drivers/net/wireless/brcm80211/brcmfmac/dhd_sdio.c

   1 /*
   2  * Copyright (c) 2010 Broadcom Corporation
   3  *
   4  * Permission to use, copy, modify, and/or distribute this software for any
   5  * purpose with or without fee is hereby granted, provided that the above
   6  * copyright notice and this permission notice appear in all copies.
   7  *
   8  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
   9  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  10  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
  11  * SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  12  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
  13  * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
  14  * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  15  */
  16
  17 #include <linux/types.h>
  18 #include <linux/kernel.h>
  19 #include <linux/kthread.h>
  20 #include <linux/printk.h>
  21 #include <linux/pci_ids.h>
  22 #include <linux/netdevice.h>
  23 #include <linux/interrupt.h>
  24 #include <linux/sched.h>
  25 #include <linux/mmc/sdio.h>
  26 #include <linux/mmc/sdio_func.h>
  27 #include <linux/mmc/card.h>
  28 #include <linux/semaphore.h>
  29 #include <linux/firmware.h>
  30 #include <linux/module.h>
  31 #include <linux/bcma/bcma.h>
  32 #include <asm/unaligned.h>
  33 #include <defs.h>
  34 #include <brcmu_wifi.h>
  35 #include <brcmu_utils.h>
  36 #include <brcm_hw_ids.h>
  37 #include <soc.h>
  38 #include "sdio_host.h"
  39 #include "sdio_chip.h"
  40
  41 #define DCMD_RESP_TIMEOUT  2000 /* In milli second */
  42
  43 #ifdef BCMDBG
  44
  45 #define BRCMF_TRAP_INFO_SIZE    80
  46
  47 #define CBUF_LEN        (128)
  48
  49 struct rte_log_le {
  50         __le32 buf;             /* Can't be pointer on (64-bit) hosts */
  51         __le32 buf_size;
  52         __le32 idx;
  53         char *_buf_compat;      /* Redundant pointer for backward compat. */
  54 };
  55
  56 struct rte_console {
  57         /* Virtual UART
  58          * When there is no UART (e.g. Quickturn),
  59          * the host should write a complete
  60          * input line directly into cbuf and then write
  61          * the length into vcons_in.
  62          * This may also be used when there is a real UART
  63          * (at risk of conflicting with
  64          * the real UART).  vcons_out is currently unused.
  65          */
  66         uint vcons_in;
  67         uint vcons_out;
  68
  69         /* Output (logging) buffer
  70          * Console output is written to a ring buffer log_buf at index log_idx.
  71          * The host may read the output when it sees log_idx advance.
  72          * Output will be lost if the output wraps around faster than the host
  73          * polls.
  74          */
  75         struct rte_log_le log_le;
  76
  77         /* Console input line buffer
  78          * Characters are read one at a time into cbuf
  79          * until <CR> is received, then
  80          * the buffer is processed as a command line.
  81          * Also used for virtual UART.
  82          */
  83         uint cbuf_idx;
  84         char cbuf[CBUF_LEN];
  85 };
  86
  87 #endif                          /* BCMDBG */
  88 #include <chipcommon.h>
  89
  90 #include "dhd.h"
  91 #include "dhd_bus.h"
  92 #include "dhd_proto.h"
  93 #include "dhd_dbg.h"
  94
  95 #define TXQLEN          2048    /* bulk tx queue length */
  96 #define TXHI            (TXQLEN - 256)  /* turn on flow control above TXHI */
  97 #define TXLOW           (TXHI - 256)    /* turn off flow control below TXLOW */
  98 #define PRIOMASK        7
  99
 100 #define TXRETRIES       2       /* # of retries for tx frames */
 101
 102 #define BRCMF_RXBOUND   50      /* Default for max rx frames in
 103                                  one scheduling */
 104
 105 #define BRCMF_TXBOUND   20      /* Default for max tx frames in
 106                                  one scheduling */
 107
 108 #define BRCMF_TXMINMAX  1       /* Max tx frames if rx still pending */
 109
 110 #define MEMBLOCK        2048    /* Block size used for downloading
 111                                  of dongle image */
 112 #define MAX_DATA_BUF    (32 * 1024)     /* Must be large enough to hold
 113                                  biggest possible glom */
 114
 115 #define BRCMF_FIRSTREAD (1 << 6)
 116
 117
 118 /* SBSDIO_DEVICE_CTL */
 119
 120 /* 1: device will assert busy signal when receiving CMD53 */
 121 #define SBSDIO_DEVCTL_SETBUSY           0x01
 122 /* 1: assertion of sdio interrupt is synchronous to the sdio clock */
 123 #define SBSDIO_DEVCTL_SPI_INTR_SYNC     0x02
 124 /* 1: mask all interrupts to host except the chipActive (rev 8) */
 125 #define SBSDIO_DEVCTL_CA_INT_ONLY       0x04
 126 /* 1: isolate internal sdio signals, put external pads in tri-state; requires
 127  * sdio bus power cycle to clear (rev 9) */
 128 #define SBSDIO_DEVCTL_PADS_ISO          0x08
 129 /* Force SD->SB reset mapping (rev 11) */
 130 #define SBSDIO_DEVCTL_SB_RST_CTL        0x30
 131 /*   Determined by CoreControl bit */
 132 #define SBSDIO_DEVCTL_RST_CORECTL       0x00
 133 /*   Force backplane reset */
 134 #define SBSDIO_DEVCTL_RST_BPRESET       0x10
 135 /*   Force no backplane reset */
 136 #define SBSDIO_DEVCTL_RST_NOBPRESET     0x20
 137
 138 /* direct(mapped) cis space */
 139
 140 /* MAPPED common CIS address */
 141 #define SBSDIO_CIS_BASE_COMMON          0x1000
 142 /* maximum bytes in one CIS */
 143 #define SBSDIO_CIS_SIZE_LIMIT           0x200
 144 /* cis offset addr is < 17 bits */
 145 #define SBSDIO_CIS_OFT_ADDR_MASK        0x1FFFF
 146
 147 /* manfid tuple length, include tuple, link bytes */
 148 #define SBSDIO_CIS_MANFID_TUPLE_LEN     6
 149
 150 /* intstatus */
 151 #define I_SMB_SW0       (1 << 0)        /* To SB Mail S/W interrupt 0 */
 152 #define I_SMB_SW1       (1 << 1)        /* To SB Mail S/W interrupt 1 */
 153 #define I_SMB_SW2       (1 << 2)        /* To SB Mail S/W interrupt 2 */
 154 #define I_SMB_SW3       (1 << 3)        /* To SB Mail S/W interrupt 3 */
 155 #define I_SMB_SW_MASK   0x0000000f      /* To SB Mail S/W interrupts mask */
 156 #define I_SMB_SW_SHIFT  0       /* To SB Mail S/W interrupts shift */
 157 #define I_HMB_SW0       (1 << 4)        /* To Host Mail S/W interrupt 0 */
 158 #define I_HMB_SW1       (1 << 5)        /* To Host Mail S/W interrupt 1 */
 159 #define I_HMB_SW2       (1 << 6)        /* To Host Mail S/W interrupt 2 */
 160 #define I_HMB_SW3       (1 << 7)        /* To Host Mail S/W interrupt 3 */
 161 #define I_HMB_SW_MASK   0x000000f0      /* To Host Mail S/W interrupts mask */
 162 #define I_HMB_SW_SHIFT  4       /* To Host Mail S/W interrupts shift */
 163 #define I_WR_OOSYNC     (1 << 8)        /* Write Frame Out Of Sync */
 164 #define I_RD_OOSYNC     (1 << 9)        /* Read Frame Out Of Sync */
 165 #define I_PC            (1 << 10)       /* descriptor error */
 166 #define I_PD            (1 << 11)       /* data error */
 167 #define I_DE            (1 << 12)       /* Descriptor protocol Error */
 168 #define I_RU            (1 << 13)       /* Receive descriptor Underflow */
 169 #define I_RO            (1 << 14)       /* Receive fifo Overflow */
 170 #define I_XU            (1 << 15)       /* Transmit fifo Underflow */
 171 #define I_RI            (1 << 16)       /* Receive Interrupt */
 172 #define I_BUSPWR        (1 << 17)       /* SDIO Bus Power Change (rev 9) */
 173 #define I_XMTDATA_AVAIL (1 << 23)       /* bits in fifo */
 174 #define I_XI            (1 << 24)       /* Transmit Interrupt */
 175 #define I_RF_TERM       (1 << 25)       /* Read Frame Terminate */
 176 #define I_WF_TERM       (1 << 26)       /* Write Frame Terminate */
 177 #define I_PCMCIA_XU     (1 << 27)       /* PCMCIA Transmit FIFO Underflow */
 178 #define I_SBINT         (1 << 28)       /* sbintstatus Interrupt */
 179 #define I_CHIPACTIVE    (1 << 29)       /* chip from doze to active state */
 180 #define I_SRESET        (1 << 30)       /* CCCR RES interrupt */
 181 #define I_IOE2          (1U << 31)      /* CCCR IOE2 Bit Changed */
 182 #define I_ERRORS        (I_PC | I_PD | I_DE | I_RU | I_RO | I_XU)
 183 #define I_DMA           (I_RI | I_XI | I_ERRORS)
 184
 185 /* corecontrol */
 186 #define CC_CISRDY               (1 << 0)        /* CIS Ready */
 187 #define CC_BPRESEN              (1 << 1)        /* CCCR RES signal */
 188 #define CC_F2RDY                (1 << 2)        /* set CCCR IOR2 bit */
 189 #define CC_CLRPADSISO           (1 << 3)        /* clear SDIO pads isolation */
 190 #define CC_XMTDATAAVAIL_MODE    (1 << 4)
 191 #define CC_XMTDATAAVAIL_CTRL    (1 << 5)
 192
 193 /* SDA_FRAMECTRL */
 194 #define SFC_RF_TERM     (1 << 0)        /* Read Frame Terminate */
 195 #define SFC_WF_TERM     (1 << 1)        /* Write Frame Terminate */
 196 #define SFC_CRC4WOOS    (1 << 2)        /* CRC error for write out of sync */
 197 #define SFC_ABORTALL    (1 << 3)        /* Abort all in-progress frames */
 198
 199 /* HW frame tag */
 200 #define SDPCM_FRAMETAG_LEN      4       /* 2 bytes len, 2 bytes check val */
 201
 202 /* Total length of frame header for dongle protocol */
 203 #define SDPCM_HDRLEN    (SDPCM_FRAMETAG_LEN + SDPCM_SWHEADER_LEN)
 204 #define SDPCM_RESERVE   (SDPCM_HDRLEN + BRCMF_SDALIGN)
 205
 206 /*
 207  * Software allocation of To SB Mailbox resources
 208  */
 209
 210 /* tosbmailbox bits corresponding to intstatus bits */
 211 #define SMB_NAK         (1 << 0)        /* Frame NAK */
 212 #define SMB_INT_ACK     (1 << 1)        /* Host Interrupt ACK */
 213 #define SMB_USE_OOB     (1 << 2)        /* Use OOB Wakeup */
 214 #define SMB_DEV_INT     (1 << 3)        /* Miscellaneous Interrupt */
 215
 216 /* tosbmailboxdata */
 217 #define SMB_DATA_VERSION_SHIFT  16      /* host protocol version */
 218
 219 /*
 220  * Software allocation of To Host Mailbox resources
 221  */
 222
 223 /* intstatus bits */
 224 #define I_HMB_FC_STATE  I_HMB_SW0       /* Flow Control State */
 225 #define I_HMB_FC_CHANGE I_HMB_SW1       /* Flow Control State Changed */
 226 #define I_HMB_FRAME_IND I_HMB_SW2       /* Frame Indication */
 227 #define I_HMB_HOST_INT  I_HMB_SW3       /* Miscellaneous Interrupt */
 228
 229 /* tohostmailboxdata */
 230 #define HMB_DATA_NAKHANDLED     1       /* retransmit NAK'd frame */
 231 #define HMB_DATA_DEVREADY       2       /* talk to host after enable */
 232 #define HMB_DATA_FC             4       /* per prio flowcontrol update flag */
 233 #define HMB_DATA_FWREADY        8       /* fw ready for protocol activity */
 234
 235 #define HMB_DATA_FCDATA_MASK    0xff000000
 236 #define HMB_DATA_FCDATA_SHIFT   24
 237
 238 #define HMB_DATA_VERSION_MASK   0x00ff0000
 239 #define HMB_DATA_VERSION_SHIFT  16
 240
 241 /*
 242  * Software-defined protocol header
 243  */
 244
 245 /* Current protocol version */
 246 #define SDPCM_PROT_VERSION      4
 247
 248 /* SW frame header */
 249 #define SDPCM_PACKET_SEQUENCE(p)        (((u8 *)p)[0] & 0xff)
 250
 251 #define SDPCM_CHANNEL_MASK              0x00000f00
 252 #define SDPCM_CHANNEL_SHIFT             8
 253 #define SDPCM_PACKET_CHANNEL(p)         (((u8 *)p)[1] & 0x0f)
 254
 255 #define SDPCM_NEXTLEN_OFFSET            2
 256
 257 /* Data Offset from SOF (HW Tag, SW Tag, Pad) */
 258 #define SDPCM_DOFFSET_OFFSET            3       /* Data Offset */
 259 #define SDPCM_DOFFSET_VALUE(p)          (((u8 *)p)[SDPCM_DOFFSET_OFFSET] & 0xff)
 260 #define SDPCM_DOFFSET_MASK              0xff000000
 261 #define SDPCM_DOFFSET_SHIFT             24
 262 #define SDPCM_FCMASK_OFFSET             4       /* Flow control */
 263 #define SDPCM_FCMASK_VALUE(p)           (((u8 *)p)[SDPCM_FCMASK_OFFSET] & 0xff)
 264 #define SDPCM_WINDOW_OFFSET             5       /* Credit based fc */
 265 #define SDPCM_WINDOW_VALUE(p)           (((u8 *)p)[SDPCM_WINDOW_OFFSET] & 0xff)
 266
 267 #define SDPCM_SWHEADER_LEN      8       /* SW header is 64 bits */
 268
 269 /* logical channel numbers */
 270 #define SDPCM_CONTROL_CHANNEL   0       /* Control channel Id */
 271 #define SDPCM_EVENT_CHANNEL     1       /* Asyc Event Indication Channel Id */
 272 #define SDPCM_DATA_CHANNEL      2       /* Data Xmit/Recv Channel Id */
 273 #define SDPCM_GLOM_CHANNEL      3       /* For coalesced packets */
 274 #define SDPCM_TEST_CHANNEL      15      /* Reserved for test/debug packets */
 275
 276 #define SDPCM_SEQUENCE_WRAP     256     /* wrap-around val for 8bit frame seq */
 277
 278 #define SDPCM_GLOMDESC(p)       (((u8 *)p)[1] & 0x80)
 279
 280 /*
 281  * Shared structure between dongle and the host.
 282  * The structure contains pointers to trap or assert information.
 283  */
 284 #define SDPCM_SHARED_VERSION       0x0002
 285 #define SDPCM_SHARED_VERSION_MASK  0x00FF
 286 #define SDPCM_SHARED_ASSERT_BUILT  0x0100
 287 #define SDPCM_SHARED_ASSERT        0x0200
 288 #define SDPCM_SHARED_TRAP          0x0400
 289
 290 /* Space for header read, limit for data packets */
 291 #define MAX_HDR_READ    (1 << 6)
 292 #define MAX_RX_DATASZ   2048
 293
 294 /* Maximum milliseconds to wait for F2 to come up */
 295 #define BRCMF_WAIT_F2RDY        3000
 296
 297 /* Bump up limit on waiting for HT to account for first startup;
 298  * if the image is doing a CRC calculation before programming the PMU
 299  * for HT availability, it could take a couple hundred ms more, so
 300  * max out at a 1 second (1000000us).
 301  */
 302 #undef PMU_MAX_TRANSITION_DLY
 303 #define PMU_MAX_TRANSITION_DLY 1000000
 304
 305 /* Value for ChipClockCSR during initial setup */
 306 #define BRCMF_INIT_CLKCTL1      (SBSDIO_FORCE_HW_CLKREQ_OFF |   \
 307                                         SBSDIO_ALP_AVAIL_REQ)
 308
 309 /* Flags for SDH calls */
 310 #define F2SYNC  (SDIO_REQ_4BYTE | SDIO_REQ_FIXED)
 311
 312 #define BRCMFMAC_FW_NAME        "brcm/brcmfmac.bin"
 313 #define BRCMFMAC_NV_NAME        "brcm/brcmfmac.txt"
 314 MODULE_FIRMWARE(BRCMFMAC_FW_NAME);
 315 MODULE_FIRMWARE(BRCMFMAC_NV_NAME);
 316
 317 /*
 318  * Conversion of 802.1D priority to precedence level
 319  */
 320 static uint prio2prec(u32 prio)
 321 {
 322         return (prio == PRIO_8021D_NONE || prio == PRIO_8021D_BE) ?
 323                (prio^2) : prio;
 324 }
 325
 326 /* core registers */
 327 struct sdpcmd_regs {
 328         u32 corecontrol;                /* 0x00, rev8 */
 329         u32 corestatus;                 /* rev8 */
 330         u32 PAD[1];
 331         u32 biststatus;                 /* rev8 */
 332
 333         /* PCMCIA access */
 334         u16 pcmciamesportaladdr;        /* 0x010, rev8 */
 335         u16 PAD[1];
 336         u16 pcmciamesportalmask;        /* rev8 */
 337         u16 PAD[1];
 338         u16 pcmciawrframebc;            /* rev8 */
 339         u16 PAD[1];
 340         u16 pcmciaunderflowtimer;       /* rev8 */
 341         u16 PAD[1];
 342
 343         /* interrupt */
 344         u32 intstatus;                  /* 0x020, rev8 */
 345         u32 hostintmask;                /* rev8 */
 346         u32 intmask;                    /* rev8 */
 347         u32 sbintstatus;                /* rev8 */
 348         u32 sbintmask;                  /* rev8 */
 349         u32 funcintmask;                /* rev4 */
 350         u32 PAD[2];
 351         u32 tosbmailbox;                /* 0x040, rev8 */
 352         u32 tohostmailbox;              /* rev8 */
 353         u32 tosbmailboxdata;            /* rev8 */
 354         u32 tohostmailboxdata;          /* rev8 */
 355
 356         /* synchronized access to registers in SDIO clock domain */
 357         u32 sdioaccess;                 /* 0x050, rev8 */
 358         u32 PAD[3];
 359
 360         /* PCMCIA frame control */
 361         u8 pcmciaframectrl;             /* 0x060, rev8 */
 362         u8 PAD[3];
 363         u8 pcmciawatermark;             /* rev8 */
 364         u8 PAD[155];
 365
 366         /* interrupt batching control */
 367         u32 intrcvlazy;                 /* 0x100, rev8 */
 368         u32 PAD[3];
 369
 370         /* counters */
 371         u32 cmd52rd;                    /* 0x110, rev8 */
 372         u32 cmd52wr;                    /* rev8 */
 373         u32 cmd53rd;                    /* rev8 */
 374         u32 cmd53wr;                    /* rev8 */
 375         u32 abort;                      /* rev8 */
 376         u32 datacrcerror;               /* rev8 */
 377         u32 rdoutofsync;                /* rev8 */
 378         u32 wroutofsync;                /* rev8 */
 379         u32 writebusy;                  /* rev8 */
 380         u32 readwait;                   /* rev8 */
 381         u32 readterm;                   /* rev8 */
 382         u32 writeterm;                  /* rev8 */
 383         u32 PAD[40];
 384         u32 clockctlstatus;             /* rev8 */
 385         u32 PAD[7];
 386
 387         u32 PAD[128];                   /* DMA engines */
 388
 389         /* SDIO/PCMCIA CIS region */
 390         char cis[512];                  /* 0x400-0x5ff, rev6 */
 391
 392         /* PCMCIA function control registers */
 393         char pcmciafcr[256];            /* 0x600-6ff, rev6 */
 394         u16 PAD[55];
 395
 396         /* PCMCIA backplane access */
 397         u16 backplanecsr;               /* 0x76E, rev6 */
 398         u16 backplaneaddr0;             /* rev6 */
 399         u16 backplaneaddr1;             /* rev6 */
 400         u16 backplaneaddr2;             /* rev6 */
 401         u16 backplaneaddr3;             /* rev6 */
 402         u16 backplanedata0;             /* rev6 */
 403         u16 backplanedata1;             /* rev6 */
 404         u16 backplanedata2;             /* rev6 */
 405         u16 backplanedata3;             /* rev6 */
 406         u16 PAD[31];
 407
 408         /* sprom "size" & "blank" info */
 409         u16 spromstatus;                /* 0x7BE, rev2 */
 410         u32 PAD[464];
 411
 412         u16 PAD[0x80];
 413 };
 414
 415 #ifdef BCMDBG
 416 /* Device console log buffer state */
 417 struct brcmf_console {
 418         uint count;             /* Poll interval msec counter */
 419         uint log_addr;          /* Log struct address (fixed) */
 420         struct rte_log_le log_le;       /* Log struct (host copy) */
 421         uint bufsize;           /* Size of log buffer */
 422         u8 *buf;                /* Log buffer (host copy) */
 423         uint last;              /* Last buffer read index */
 424 };
 425 #endif                          /* BCMDBG */
 426
 427 struct sdpcm_shared {
 428         u32 flags;
 429         u32 trap_addr;
 430         u32 assert_exp_addr;
 431         u32 assert_file_addr;
 432         u32 assert_line;
 433         u32 console_addr;       /* Address of struct rte_console */
 434         u32 msgtrace_addr;
 435         u8 tag[32];
 436 };
 437
 438 struct sdpcm_shared_le {
 439         __le32 flags;
 440         __le32 trap_addr;
 441         __le32 assert_exp_addr;
 442         __le32 assert_file_addr;
 443         __le32 assert_line;
 444         __le32 console_addr;    /* Address of struct rte_console */
 445         __le32 msgtrace_addr;
 446         u8 tag[32];
 447 };
 448
 449
 450 /* misc chip info needed by some of the routines */
 451 /* Private data for SDIO bus interaction */
 452 struct brcmf_sdio {
 453         struct brcmf_pub *drvr;
 454
 455         struct brcmf_sdio_dev *sdiodev; /* sdio device handler */
 456         struct chip_info *ci;   /* Chip info struct */
 457         char *vars;             /* Variables (from CIS and/or other) */
 458         uint varsz;             /* Size of variables buffer */
 459
 460         u32 ramsize;            /* Size of RAM in SOCRAM (bytes) */
 461
 462         u32 hostintmask;        /* Copy of Host Interrupt Mask */
 463         u32 intstatus;  /* Intstatus bits (events) pending */
 464         bool dpc_sched;         /* Indicates DPC schedule (intrpt rcvd) */
 465         bool fcstate;           /* State of dongle flow-control */
 466
 467         uint blocksize;         /* Block size of SDIO transfers */
 468         uint roundup;           /* Max roundup limit */
 469
 470         struct pktq txq;        /* Queue length used for flow-control */
 471         u8 flowcontrol; /* per prio flow control bitmask */
 472         u8 tx_seq;              /* Transmit sequence number (next) */
 473         u8 tx_max;              /* Maximum transmit sequence allowed */
 474
 475         u8 hdrbuf[MAX_HDR_READ + BRCMF_SDALIGN];
 476         u8 *rxhdr;              /* Header of current rx frame (in hdrbuf) */
 477         u16 nextlen;            /* Next Read Len from last header */
 478         u8 rx_seq;              /* Receive sequence number (expected) */
 479         bool rxskip;            /* Skip receive (awaiting NAK ACK) */
 480
 481         uint rxbound;           /* Rx frames to read before resched */
 482         uint txbound;           /* Tx frames to send before resched */
 483         uint txminmax;
 484
 485         struct sk_buff *glomd;  /* Packet containing glomming descriptor */
 486         struct sk_buff_head glom; /* Packet list for glommed superframe */
 487         uint glomerr;           /* Glom packet read errors */
 488
 489         u8 *rxbuf;              /* Buffer for receiving control packets */
 490         uint rxblen;            /* Allocated length of rxbuf */
 491         u8 *rxctl;              /* Aligned pointer into rxbuf */
 492         u8 *databuf;            /* Buffer for receiving big glom packet */
 493         u8 *dataptr;            /* Aligned pointer into databuf */
 494         uint rxlen;             /* Length of valid data in buffer */
 495
 496         u8 sdpcm_ver;   /* Bus protocol reported by dongle */
 497
 498         bool intr;              /* Use interrupts */
 499         bool poll;              /* Use polling */
 500         bool ipend;             /* Device interrupt is pending */
 501         uint intrcount;         /* Count of device interrupt callbacks */
 502         uint lastintrs;         /* Count as of last watchdog timer */
 503         uint spurious;          /* Count of spurious interrupts */
 504         uint pollrate;          /* Ticks between device polls */
 505         uint polltick;          /* Tick counter */
 506         uint pollcnt;           /* Count of active polls */
 507
 508 #ifdef BCMDBG
 509         uint console_interval;
 510         struct brcmf_console console;   /* Console output polling support */
 511         uint console_addr;      /* Console address from shared struct */
 512 #endif                          /* BCMDBG */
 513
 514         uint regfails;          /* Count of R_REG failures */
 515
 516         uint clkstate;          /* State of sd and backplane clock(s) */
 517         bool activity;          /* Activity flag for clock down */
 518         s32 idletime;           /* Control for activity timeout */
 519         s32 idlecount;  /* Activity timeout counter */
 520         s32 idleclock;  /* How to set bus driver when idle */
 521         s32 sd_rxchain;
 522         bool use_rxchain;       /* If brcmf should use PKT chains */
 523         bool sleeping;          /* Is SDIO bus sleeping? */
 524         bool rxflow_mode;       /* Rx flow control mode */
 525         bool rxflow;            /* Is rx flow control on */
 526         bool alp_only;          /* Don't use HT clock (ALP only) */
 527 /* Field to decide if rx of control frames happen in rxbuf or lb-pool */
 528         bool usebufpool;
 529
 530         /* Some additional counters */
 531         uint tx_sderrs;         /* Count of tx attempts with sd errors */
 532         uint fcqueued;          /* Tx packets that got queued */
 533         uint rxrtx;             /* Count of rtx requests (NAK to dongle) */
 534         uint rx_toolong;        /* Receive frames too long to receive */
 535         uint rxc_errors;        /* SDIO errors when reading control frames */
 536         uint rx_hdrfail;        /* SDIO errors on header reads */
 537         uint rx_badhdr;         /* Bad received headers (roosync?) */
 538         uint rx_badseq;         /* Mismatched rx sequence number */
 539         uint fc_rcvd;           /* Number of flow-control events received */
 540         uint fc_xoff;           /* Number which turned on flow-control */
 541         uint fc_xon;            /* Number which turned off flow-control */
 542         uint rxglomfail;        /* Failed deglom attempts */
 543         uint rxglomframes;      /* Number of glom frames (superframes) */
 544         uint rxglompkts;        /* Number of packets from glom frames */
 545         uint f2rxhdrs;          /* Number of header reads */
 546         uint f2rxdata;          /* Number of frame data reads */
 547         uint f2txdata;          /* Number of f2 frame writes */
 548         uint f1regdata;         /* Number of f1 register accesses */
 549
 550         u8 *ctrl_frame_buf;
 551         u32 ctrl_frame_len;
 552         bool ctrl_frame_stat;
 553
 554         spinlock_t txqlock;
 555         wait_queue_head_t ctrl_wait;
 556         wait_queue_head_t dcmd_resp_wait;
 557
 558         struct timer_list timer;
 559         struct completion watchdog_wait;
 560         struct task_struct *watchdog_tsk;
 561         bool wd_timer_valid;
 562         uint save_ms;
 563
 564         struct task_struct *dpc_tsk;
 565         struct completion dpc_wait;
 566
 567         struct semaphore sdsem;
 568
 569         const struct firmware *firmware;
 570         u32 fw_ptr;
 571 };
 572
 573 /* clkstate */
 574 #define CLK_NONE        0
 575 #define CLK_SDONLY      1
 576 #define CLK_PENDING     2       /* Not used yet */
 577 #define CLK_AVAIL       3
 578
 579 #ifdef BCMDBG
 580 static int qcount[NUMPRIO];
 581 static int tx_packets[NUMPRIO];
 582 #endif                          /* BCMDBG */
 583
 584 #define SDIO_DRIVE_STRENGTH     6       /* in milliamps */
 585
 586 #define RETRYCHAN(chan) ((chan) == SDPCM_EVENT_CHANNEL)
 587
 588 /* Retry count for register access failures */
 589 static const uint retry_limit = 2;
 590
 591 /* Limit on rounding up frames */
 592 static const uint max_roundup = 512;
 593
 594 #define ALIGNMENT  4
 595
 596 static void pkt_align(struct sk_buff *p, int len, int align)
 597 {
 598         uint datalign;
 599         datalign = (unsigned long)(p->data);
 600         datalign = roundup(datalign, (align)) - datalign;
 601         if (datalign)
 602                 skb_pull(p, datalign);
 603         __skb_trim(p, len);
 604 }
 605
 606 /* To check if there's window offered */
 607 static bool data_ok(struct brcmf_sdio *bus)
 608 {
 609         return (u8)(bus->tx_max - bus->tx_seq) != 0 &&
 610                ((u8)(bus->tx_max - bus->tx_seq) & 0x80) == 0;
 611 }
 612
 613 /*
 614  * Reads a register in the SDIO hardware block. This block occupies a series of
 615  * adresses on the 32 bit backplane bus.
 616  */
 617 static void
 618 r_sdreg32(struct brcmf_sdio *bus, u32 *regvar, u32 reg_offset, u32 *retryvar)
 619 {
 620         u8 idx = brcmf_sdio_chip_getinfidx(bus->ci, BCMA_CORE_SDIO_DEV);
 621         *retryvar = 0;
 622         do {
 623                 *regvar = brcmf_sdcard_reg_read(bus->sdiodev,
 624                                 bus->ci->c_inf[idx].base + reg_offset,
 625                                 sizeof(u32));
 626         } while (brcmf_sdcard_regfail(bus->sdiodev) &&
 627                  (++(*retryvar) <= retry_limit));
 628         if (*retryvar) {
 629                 bus->regfails += (*retryvar-1);
 630                 if (*retryvar > retry_limit) {
 631                         brcmf_dbg(ERROR, "FAILED READ %Xh\n", reg_offset);
 632                         *regvar = 0;
 633                 }
 634         }
 635 }
 636
 637 static void
 638 w_sdreg32(struct brcmf_sdio *bus, u32 regval, u32 reg_offset, u32 *retryvar)
 639 {
 640         u8 idx = brcmf_sdio_chip_getinfidx(bus->ci, BCMA_CORE_SDIO_DEV);
 641         *retryvar = 0;
 642         do {
 643                 brcmf_sdcard_reg_write(bus->sdiodev,
 644                                        bus->ci->c_inf[idx].base + reg_offset,
 645                                        sizeof(u32), regval);
 646         } while (brcmf_sdcard_regfail(bus->sdiodev) &&
 647                  (++(*retryvar) <= retry_limit));
 648         if (*retryvar) {
 649                 bus->regfails += (*retryvar-1);
 650                 if (*retryvar > retry_limit)
 651                         brcmf_dbg(ERROR, "FAILED REGISTER WRITE %Xh\n",
 652                                   reg_offset);
 653         }
 654 }
 655
 656 #define PKT_AVAILABLE()         (intstatus & I_HMB_FRAME_IND)
 657
 658 #define HOSTINTMASK             (I_HMB_SW_MASK | I_CHIPACTIVE)
 659
 660 /* Packet free applicable unconditionally for sdio and sdspi.
 661  * Conditional if bufpool was present for gspi bus.
 662  */
 663 static void brcmf_sdbrcm_pktfree2(struct brcmf_sdio *bus, struct sk_buff *pkt)
 664 {
 665         if (bus->usebufpool)
 666                 brcmu_pkt_buf_free_skb(pkt);
 667 }
 668
 669 /* Turn backplane clock on or off */
 670 static int brcmf_sdbrcm_htclk(struct brcmf_sdio *bus, bool on, bool pendok)
 671 {
 672         int err;
 673         u8 clkctl, clkreq, devctl;
 674         unsigned long timeout;
 675
 676         brcmf_dbg(TRACE, "Enter\n");
 677
 678         clkctl = 0;
 679
 680         if (on) {
 681                 /* Request HT Avail */
 682                 clkreq =
 683                     bus->alp_only ? SBSDIO_ALP_AVAIL_REQ : SBSDIO_HT_AVAIL_REQ;
 684
 685                 brcmf_sdcard_cfg_write(bus->sdiodev, SDIO_FUNC_1,
 686                                        SBSDIO_FUNC1_CHIPCLKCSR, clkreq, &err);
 687                 if (err) {
 688                         brcmf_dbg(ERROR, "HT Avail request error: %d\n", err);
 689                         return -EBADE;
 690                 }
 691
 692                 /* Check current status */
 693                 clkctl = brcmf_sdcard_cfg_read(bus->sdiodev, SDIO_FUNC_1,
 694                                                SBSDIO_FUNC1_CHIPCLKCSR, &err);
 695                 if (err) {
 696                         brcmf_dbg(ERROR, "HT Avail read error: %d\n", err);
 697                         return -EBADE;
 698                 }
 699
 700                 /* Go to pending and await interrupt if appropriate */
 701                 if (!SBSDIO_CLKAV(clkctl, bus->alp_only) && pendok) {
 702                         /* Allow only clock-available interrupt */
 703                         devctl = brcmf_sdcard_cfg_read(bus->sdiodev,
 704                                         SDIO_FUNC_1,
 705                                         SBSDIO_DEVICE_CTL, &err);
 706                         if (err) {
 707                                 brcmf_dbg(ERROR, "Devctl error setting CA: %d\n",
 708                                           err);
 709                                 return -EBADE;
 710                         }
 711
 712                         devctl |= SBSDIO_DEVCTL_CA_INT_ONLY;
 713                         brcmf_sdcard_cfg_write(bus->sdiodev, SDIO_FUNC_1,
 714                                                SBSDIO_DEVICE_CTL, devctl, &err);
 715                         brcmf_dbg(INFO, "CLKCTL: set PENDING\n");
 716                         bus->clkstate = CLK_PENDING;
 717
 718                         return 0;
 719                 } else if (bus->clkstate == CLK_PENDING) {
 720                         /* Cancel CA-only interrupt filter */
 721                         devctl =
 722                             brcmf_sdcard_cfg_read(bus->sdiodev, SDIO_FUNC_1,
 723                                                   SBSDIO_DEVICE_CTL, &err);
 724                         devctl &= ~SBSDIO_DEVCTL_CA_INT_ONLY;
 725                         brcmf_sdcard_cfg_write(bus->sdiodev, SDIO_FUNC_1,
 726                                 SBSDIO_DEVICE_CTL, devctl, &err);
 727                 }
 728
 729                 /* Otherwise, wait here (polling) for HT Avail */
 730                 timeout = jiffies +
 731                           msecs_to_jiffies(PMU_MAX_TRANSITION_DLY/1000);
 732                 while (!SBSDIO_CLKAV(clkctl, bus->alp_only)) {
 733                         clkctl = brcmf_sdcard_cfg_read(bus->sdiodev,
 734                                                        SDIO_FUNC_1,
 735                                                        SBSDIO_FUNC1_CHIPCLKCSR,
 736                                                        &err);
 737                         if (time_after(jiffies, timeout))
 738                                 break;
 739                         else
 740                                 usleep_range(5000, 10000);
 741                 }
 742                 if (err) {
 743                         brcmf_dbg(ERROR, "HT Avail request error: %d\n", err);
 744                         return -EBADE;
 745                 }
 746                 if (!SBSDIO_CLKAV(clkctl, bus->alp_only)) {
 747                         brcmf_dbg(ERROR, "HT Avail timeout (%d): clkctl 0x%02x\n",
 748                                   PMU_MAX_TRANSITION_DLY, clkctl);
 749                         return -EBADE;
 750                 }
 751
 752                 /* Mark clock available */
 753                 bus->clkstate = CLK_AVAIL;
 754                 brcmf_dbg(INFO, "CLKCTL: turned ON\n");
 755
 756 #if defined(BCMDBG)
 757                 if (bus->alp_only != true) {
 758                         if (SBSDIO_ALPONLY(clkctl))
 759                                 brcmf_dbg(ERROR, "HT Clock should be on\n");
 760                 }
 761 #endif                          /* defined (BCMDBG) */
 762
 763                 bus->activity = true;
 764         } else {
 765                 clkreq = 0;
 766
 767                 if (bus->clkstate == CLK_PENDING) {
 768                         /* Cancel CA-only interrupt filter */
 769                         devctl = brcmf_sdcard_cfg_read(bus->sdiodev,
 770                                         SDIO_FUNC_1,
 771                                         SBSDIO_DEVICE_CTL, &err);
 772                         devctl &= ~SBSDIO_DEVCTL_CA_INT_ONLY;
 773                         brcmf_sdcard_cfg_write(bus->sdiodev, SDIO_FUNC_1,
 774                                 SBSDIO_DEVICE_CTL, devctl, &err);
 775                 }
 776
 777                 bus->clkstate = CLK_SDONLY;
 778                 brcmf_sdcard_cfg_write(bus->sdiodev, SDIO_FUNC_1,
 779                         SBSDIO_FUNC1_CHIPCLKCSR, clkreq, &err);
 780                 brcmf_dbg(INFO, "CLKCTL: turned OFF\n");
 781                 if (err) {
 782                         brcmf_dbg(ERROR, "Failed access turning clock off: %d\n",
 783                                   err);
 784                         return -EBADE;
 785                 }
 786         }
 787         return 0;
 788 }
 789
 790 /* Change idle/active SD state */
 791 static int brcmf_sdbrcm_sdclk(struct brcmf_sdio *bus, bool on)
 792 {
 793         brcmf_dbg(TRACE, "Enter\n");
 794
 795         if (on)
 796                 bus->clkstate = CLK_SDONLY;
 797         else
 798                 bus->clkstate = CLK_NONE;
 799
 800         return 0;
 801 }
 802
 803 /* Transition SD and backplane clock readiness */
 804 static int brcmf_sdbrcm_clkctl(struct brcmf_sdio *bus, uint target, bool pendok)
 805 {
 806 #ifdef BCMDBG
 807         uint oldstate = bus->clkstate;
 808 #endif                          /* BCMDBG */
 809
 810         brcmf_dbg(TRACE, "Enter\n");
 811
 812         /* Early exit if we're already there */
 813         if (bus->clkstate == target) {
 814                 if (target == CLK_AVAIL) {
 815                         brcmf_sdbrcm_wd_timer(bus, BRCMF_WD_POLL_MS);
 816                         bus->activity = true;
 817                 }
 818                 return 0;
 819         }
 820
 821         switch (target) {
 822         case CLK_AVAIL:
 823                 /* Make sure SD clock is available */
 824                 if (bus->clkstate == CLK_NONE)
 825                         brcmf_sdbrcm_sdclk(bus, true);
 826                 /* Now request HT Avail on the backplane */
 827                 brcmf_sdbrcm_htclk(bus, true, pendok);
 828                 brcmf_sdbrcm_wd_timer(bus, BRCMF_WD_POLL_MS);
 829                 bus->activity = true;
 830                 break;
 831
 832         case CLK_SDONLY:
 833                 /* Remove HT request, or bring up SD clock */
 834                 if (bus->clkstate == CLK_NONE)
 835                         brcmf_sdbrcm_sdclk(bus, true);
 836                 else if (bus->clkstate == CLK_AVAIL)
 837                         brcmf_sdbrcm_htclk(bus, false, false);
 838                 else
 839                         brcmf_dbg(ERROR, "request for %d -> %d\n",
 840                                   bus->clkstate, target);
 841                 brcmf_sdbrcm_wd_timer(bus, BRCMF_WD_POLL_MS);
 842                 break;
 843
 844         case CLK_NONE:
 845                 /* Make sure to remove HT request */
 846                 if (bus->clkstate == CLK_AVAIL)
 847                         brcmf_sdbrcm_htclk(bus, false, false);
 848                 /* Now remove the SD clock */
 849                 brcmf_sdbrcm_sdclk(bus, false);
 850                 brcmf_sdbrcm_wd_timer(bus, 0);
 851                 break;
 852         }
 853 #ifdef BCMDBG
 854         brcmf_dbg(INFO, "%d -> %d\n", oldstate, bus->clkstate);
 855 #endif                          /* BCMDBG */
 856
 857         return 0;
 858 }
 859
 860 static int brcmf_sdbrcm_bussleep(struct brcmf_sdio *bus, bool sleep)
 861 {
 862         uint retries = 0;
 863
 864         brcmf_dbg(INFO, "request %s (currently %s)\n",
 865                   sleep ? "SLEEP" : "WAKE",
 866                   bus->sleeping ? "SLEEP" : "WAKE");
 867
 868         /* Done if we're already in the requested state */
 869         if (sleep == bus->sleeping)
 870                 return 0;
 871
 872         /* Going to sleep: set the alarm and turn off the lights... */
 873         if (sleep) {
 874                 /* Don't sleep if something is pending */
 875                 if (bus->dpc_sched || bus->rxskip || pktq_len(&bus->txq))
 876                         return -EBUSY;
 877
 878                 /* Make sure the controller has the bus up */
 879                 brcmf_sdbrcm_clkctl(bus, CLK_AVAIL, false);
 880
 881                 /* Tell device to start using OOB wakeup */
 882                 w_sdreg32(bus, SMB_USE_OOB,
 883                           offsetof(struct sdpcmd_regs, tosbmailbox), &retries);
 884                 if (retries > retry_limit)
 885                         brcmf_dbg(ERROR, "CANNOT SIGNAL CHIP, WILL NOT WAKE UP!!\n");
 886
 887                 /* Turn off our contribution to the HT clock request */
 888                 brcmf_sdbrcm_clkctl(bus, CLK_SDONLY, false);
 889
 890                 brcmf_sdcard_cfg_write(bus->sdiodev, SDIO_FUNC_1,
 891                         SBSDIO_FUNC1_CHIPCLKCSR,
 892                         SBSDIO_FORCE_HW_CLKREQ_OFF, NULL);
 893
 894                 /* Isolate the bus */
 895                 brcmf_sdcard_cfg_write(bus->sdiodev, SDIO_FUNC_1,
 896                         SBSDIO_DEVICE_CTL,
 897                         SBSDIO_DEVCTL_PADS_ISO, NULL);
 898
 899                 /* Change state */
 900                 bus->sleeping = true;
 901
 902         } else {
 903                 /* Waking up: bus power up is ok, set local state */
 904
 905                 brcmf_sdcard_cfg_write(bus->sdiodev, SDIO_FUNC_1,
 906                         SBSDIO_FUNC1_CHIPCLKCSR, 0, NULL);
 907
 908                 /* Make sure the controller has the bus up */
 909                 brcmf_sdbrcm_clkctl(bus, CLK_AVAIL, false);
 910
 911                 /* Send misc interrupt to indicate OOB not needed */
 912                 w_sdreg32(bus, 0, offsetof(struct sdpcmd_regs, tosbmailboxdata),
 913                           &retries);
 914                 if (retries <= retry_limit)
 915                         w_sdreg32(bus, SMB_DEV_INT,
 916                                   offsetof(struct sdpcmd_regs, tosbmailbox),
 917                                   &retries);
 918
 919                 if (retries > retry_limit)
 920                         brcmf_dbg(ERROR, "CANNOT SIGNAL CHIP TO CLEAR OOB!!\n");
 921
 922                 /* Make sure we have SD bus access */
 923                 brcmf_sdbrcm_clkctl(bus, CLK_SDONLY, false);
 924
 925                 /* Change state */
 926                 bus->sleeping = false;
 927         }
 928
 929         return 0;
 930 }
 931
 932 static void bus_wake(struct brcmf_sdio *bus)
 933 {
 934         if (bus->sleeping)
 935                 brcmf_sdbrcm_bussleep(bus, false);
 936 }
 937
 938 static u32 brcmf_sdbrcm_hostmail(struct brcmf_sdio *bus)
 939 {
 940         u32 intstatus = 0;
 941         u32 hmb_data;
 942         u8 fcbits;
 943         uint retries = 0;
 944
 945         brcmf_dbg(TRACE, "Enter\n");
 946
 947         /* Read mailbox data and ack that we did so */
 948         r_sdreg32(bus, &hmb_data,
 949                   offsetof(struct sdpcmd_regs, tohostmailboxdata), &retries);
 950
 951         if (retries <= retry_limit)
 952                 w_sdreg32(bus, SMB_INT_ACK,
 953                           offsetof(struct sdpcmd_regs, tosbmailbox), &retries);
 954         bus->f1regdata += 2;
 955
 956         /* Dongle recomposed rx frames, accept them again */
 957         if (hmb_data & HMB_DATA_NAKHANDLED) {
 958                 brcmf_dbg(INFO, "Dongle reports NAK handled, expect rtx of %d\n",
 959                           bus->rx_seq);
 960                 if (!bus->rxskip)
 961                         brcmf_dbg(ERROR, "unexpected NAKHANDLED!\n");
 962
 963                 bus->rxskip = false;
 964                 intstatus |= I_HMB_FRAME_IND;
 965         }
 966
 967         /*
 968          * DEVREADY does not occur with gSPI.
 969          */
 970         if (hmb_data & (HMB_DATA_DEVREADY | HMB_DATA_FWREADY)) {
 971                 bus->sdpcm_ver =
 972                     (hmb_data & HMB_DATA_VERSION_MASK) >>
 973                     HMB_DATA_VERSION_SHIFT;
 974                 if (bus->sdpcm_ver != SDPCM_PROT_VERSION)
 975                         brcmf_dbg(ERROR, "Version mismatch, dongle reports %d, "
 976                                   "expecting %d\n",
 977                                   bus->sdpcm_ver, SDPCM_PROT_VERSION);
 978                 else
 979                         brcmf_dbg(INFO, "Dongle ready, protocol version %d\n",
 980                                   bus->sdpcm_ver);
 981         }
 982
 983         /*
 984          * Flow Control has been moved into the RX headers and this out of band
 985          * method isn't used any more.
 986          * remaining backward compatible with older dongles.
 987          */
 988         if (hmb_data & HMB_DATA_FC) {
 989                 fcbits = (hmb_data & HMB_DATA_FCDATA_MASK) >>
 990                                                         HMB_DATA_FCDATA_SHIFT;
 991
 992                 if (fcbits & ~bus->flowcontrol)
 993                         bus->fc_xoff++;
 994
 995                 if (bus->flowcontrol & ~fcbits)
 996                         bus->fc_xon++;
 997
 998                 bus->fc_rcvd++;
 999                 bus->flowcontrol = fcbits;
1000         }
1001
1002         /* Shouldn't be any others */
1003         if (hmb_data & ~(HMB_DATA_DEVREADY |
1004                          HMB_DATA_NAKHANDLED |
1005                          HMB_DATA_FC |
1006                          HMB_DATA_FWREADY |
1007                          HMB_DATA_FCDATA_MASK | HMB_DATA_VERSION_MASK))
1008                 brcmf_dbg(ERROR, "Unknown mailbox data content: 0x%02x\n",
1009                           hmb_data);
1010
1011         return intstatus;
1012 }
1013
1014 static void brcmf_sdbrcm_rxfail(struct brcmf_sdio *bus, bool abort, bool rtx)
1015 {
1016         uint retries = 0;
1017         u16 lastrbc;
1018         u8 hi, lo;
1019         int err;
1020
1021         brcmf_dbg(ERROR, "%sterminate frame%s\n",
1022                   abort ? "abort command, " : "",
1023                   rtx ? ", send NAK" : "");
1024
1025         if (abort)
1026                 brcmf_sdcard_abort(bus->sdiodev, SDIO_FUNC_2);
1027
1028         brcmf_sdcard_cfg_write(bus->sdiodev, SDIO_FUNC_1,
1029                                SBSDIO_FUNC1_FRAMECTRL,
1030                                SFC_RF_TERM, &err);
1031         bus->f1regdata++;
1032
1033         /* Wait until the packet has been flushed (device/FIFO stable) */
1034         for (lastrbc = retries = 0xffff; retries > 0; retries--) {
1035                 hi = brcmf_sdcard_cfg_read(bus->sdiodev, SDIO_FUNC_1,
1036                                            SBSDIO_FUNC1_RFRAMEBCHI, NULL);
1037                 lo = brcmf_sdcard_cfg_read(bus->sdiodev, SDIO_FUNC_1,
1038                                            SBSDIO_FUNC1_RFRAMEBCLO, NULL);
1039                 bus->f1regdata += 2;
1040
1041                 if ((hi == 0) && (lo == 0))
1042                         break;
1043
1044                 if ((hi > (lastrbc >> 8)) && (lo > (lastrbc & 0x00ff))) {
1045                         brcmf_dbg(ERROR, "count growing: last 0x%04x now 0x%04x\n",
1046                                   lastrbc, (hi << 8) + lo);
1047                 }
1048                 lastrbc = (hi << 8) + lo;
1049         }
1050
1051         if (!retries)
1052                 brcmf_dbg(ERROR, "count never zeroed: last 0x%04x\n", lastrbc);
1053         else
1054                 brcmf_dbg(INFO, "flush took %d iterations\n", 0xffff - retries);
1055
1056         if (rtx) {
1057                 bus->rxrtx++;
1058                 w_sdreg32(bus, SMB_NAK,
1059                           offsetof(struct sdpcmd_regs, tosbmailbox), &retries);
1060
1061                 bus->f1regdata++;
1062                 if (retries <= retry_limit)
1063                         bus->rxskip = true;
1064         }
1065
1066         /* Clear partial in any case */
1067         bus->nextlen = 0;
1068
1069         /* If we can't reach the device, signal failure */
1070         if (err || brcmf_sdcard_regfail(bus->sdiodev))
1071                 bus->drvr->bus_if->state = BRCMF_BUS_DOWN;
1072 }
1073
1074 /* copy a buffer into a pkt buffer chain */
1075 static uint brcmf_sdbrcm_glom_from_buf(struct brcmf_sdio *bus, uint len)
1076 {
1077         uint n, ret = 0;
1078         struct sk_buff *p;
1079         u8 *buf;
1080
1081         buf = bus->dataptr;
1082
1083         /* copy the data */
1084         skb_queue_walk(&bus->glom, p) {
1085                 n = min_t(uint, p->len, len);
1086                 memcpy(p->data, buf, n);
1087                 buf += n;
1088                 len -= n;
1089                 ret += n;
1090                 if (!len)
1091                         break;
1092         }
1093
1094         return ret;
1095 }
1096
1097 /* return total length of buffer chain */
1098 static uint brcmf_sdbrcm_glom_len(struct brcmf_sdio *bus)
1099 {
1100         struct sk_buff *p;
1101         uint total;
1102
1103         total = 0;
1104         skb_queue_walk(&bus->glom, p)
1105                 total += p->len;
1106         return total;
1107 }
1108
1109 static void brcmf_sdbrcm_free_glom(struct brcmf_sdio *bus)
1110 {
1111         struct sk_buff *cur, *next;
1112
1113         skb_queue_walk_safe(&bus->glom, cur, next) {
1114                 skb_unlink(cur, &bus->glom);
1115                 brcmu_pkt_buf_free_skb(cur);
1116         }
1117 }
1118
1119 static u8 brcmf_sdbrcm_rxglom(struct brcmf_sdio *bus, u8 rxseq)
1120 {
1121         u16 dlen, totlen;
1122         u8 *dptr, num = 0;
1123
1124         u16 sublen, check;
1125         struct sk_buff *pfirst, *pnext;
1126
1127         int errcode;
1128         u8 chan, seq, doff, sfdoff;
1129         u8 txmax;
1130
1131         int ifidx = 0;
1132         bool usechain = bus->use_rxchain;
1133
1134         /* If packets, issue read(s) and send up packet chain */
1135         /* Return sequence numbers consumed? */
1136
1137         brcmf_dbg(TRACE, "start: glomd %p glom %p\n",
1138                   bus->glomd, skb_peek(&bus->glom));
1139
1140         /* If there's a descriptor, generate the packet chain */
1141         if (bus->glomd) {
1142                 pfirst = pnext = NULL;
1143                 dlen = (u16) (bus->glomd->len);
1144                 dptr = bus->glomd->data;
1145                 if (!dlen || (dlen & 1)) {
1146                         brcmf_dbg(ERROR, "bad glomd len(%d), ignore descriptor\n",
1147                                   dlen);
1148                         dlen = 0;
1149                 }
1150
1151                 for (totlen = num = 0; dlen; num++) {
1152                         /* Get (and move past) next length */
1153                         sublen = get_unaligned_le16(dptr);
1154                         dlen -= sizeof(u16);
1155                         dptr += sizeof(u16);
1156                         if ((sublen < SDPCM_HDRLEN) ||
1157                             ((num == 0) && (sublen < (2 * SDPCM_HDRLEN)))) {
1158                                 brcmf_dbg(ERROR, "descriptor len %d bad: %d\n",
1159                                           num, sublen);
1160                                 pnext = NULL;
1161                                 break;
1162                         }
1163                         if (sublen % BRCMF_SDALIGN) {
1164                                 brcmf_dbg(ERROR, "sublen %d not multiple of %d\n",
1165                                           sublen, BRCMF_SDALIGN);
1166                                 usechain = false;
1167                         }
1168                         totlen += sublen;
1169
1170                         /* For last frame, adjust read len so total
1171                                  is a block multiple */
1172                         if (!dlen) {
1173                                 sublen +=
1174                                     (roundup(totlen, bus->blocksize) - totlen);
1175                                 totlen = roundup(totlen, bus->blocksize);
1176                         }
1177
1178                         /* Allocate/chain packet for next subframe */
1179                         pnext = brcmu_pkt_buf_get_skb(sublen + BRCMF_SDALIGN);
1180                         if (pnext == NULL) {
1181                                 brcmf_dbg(ERROR, "bcm_pkt_buf_get_skb failed, num %d len %d\n",
1182                                           num, sublen);
1183                                 break;
1184                         }
1185                         skb_queue_tail(&bus->glom, pnext);
1186
1187                         /* Adhere to start alignment requirements */
1188                         pkt_align(pnext, sublen, BRCMF_SDALIGN);
1189                 }
1190
1191                 /* If all allocations succeeded, save packet chain
1192                          in bus structure */
1193                 if (pnext) {
1194                         brcmf_dbg(GLOM, "allocated %d-byte packet chain for %d subframes\n",
1195                                   totlen, num);
1196                         if (BRCMF_GLOM_ON() && bus->nextlen &&
1197                             totlen != bus->nextlen) {
1198                                 brcmf_dbg(GLOM, "glomdesc mismatch: nextlen %d glomdesc %d rxseq %d\n",
1199                                           bus->nextlen, totlen, rxseq);
1200                         }
1201                         pfirst = pnext = NULL;
1202                 } else {
1203                         brcmf_sdbrcm_free_glom(bus);
1204                         num = 0;
1205                 }
1206
1207                 /* Done with descriptor packet */
1208                 brcmu_pkt_buf_free_skb(bus->glomd);
1209                 bus->glomd = NULL;
1210                 bus->nextlen = 0;
1211         }
1212
1213         /* Ok -- either we just generated a packet chain,
1214                  or had one from before */
1215         if (!skb_queue_empty(&bus->glom)) {
1216                 if (BRCMF_GLOM_ON()) {
1217                         brcmf_dbg(GLOM, "try superframe read, packet chain:\n");
1218                         skb_queue_walk(&bus->glom, pnext) {
1219                                 brcmf_dbg(GLOM, "    %p: %p len 0x%04x (%d)\n",
1220                                           pnext, (u8 *) (pnext->data),
1221                                           pnext->len, pnext->len);
1222                         }
1223                 }
1224
1225                 pfirst = skb_peek(&bus->glom);
1226                 dlen = (u16) brcmf_sdbrcm_glom_len(bus);
1227
1228                 /* Do an SDIO read for the superframe.  Configurable iovar to
1229                  * read directly into the chained packet, or allocate a large
1230                  * packet and and copy into the chain.
1231                  */
1232                 if (usechain) {
1233                         errcode = brcmf_sdcard_recv_chain(bus->sdiodev,
1234                                         bus->sdiodev->sbwad,
1235                                         SDIO_FUNC_2, F2SYNC, &bus->glom);
1236                 } else if (bus->dataptr) {
1237                         errcode = brcmf_sdcard_recv_buf(bus->sdiodev,
1238                                         bus->sdiodev->sbwad,
1239                                         SDIO_FUNC_2, F2SYNC,
1240                                         bus->dataptr, dlen);
1241                         sublen = (u16) brcmf_sdbrcm_glom_from_buf(bus, dlen);
1242                         if (sublen != dlen) {
1243                                 brcmf_dbg(ERROR, "FAILED TO COPY, dlen %d sublen %d\n",
1244                                           dlen, sublen);
1245                                 errcode = -1;
1246                         }
1247                         pnext = NULL;
1248                 } else {
1249                         brcmf_dbg(ERROR, "COULDN'T ALLOC %d-BYTE GLOM, FORCE FAILURE\n",
1250                                   dlen);
1251                         errcode = -1;
1252                 }
1253                 bus->f2rxdata++;
1254
1255                 /* On failure, kill the superframe, allow a couple retries */
1256                 if (errcode < 0) {
1257                         brcmf_dbg(ERROR, "glom read of %d bytes failed: %d\n",
1258                                   dlen, errcode);
1259                         bus->drvr->rx_errors++;
1260
1261                         if (bus->glomerr++ < 3) {
1262                                 brcmf_sdbrcm_rxfail(bus, true, true);
1263                         } else {
1264                                 bus->glomerr = 0;
1265                                 brcmf_sdbrcm_rxfail(bus, true, false);
1266                                 bus->rxglomfail++;
1267                                 brcmf_sdbrcm_free_glom(bus);
1268                         }
1269                         return 0;
1270                 }
1271 #ifdef BCMDBG
1272                 if (BRCMF_GLOM_ON()) {
1273                         printk(KERN_DEBUG "SUPERFRAME:\n");
1274                         print_hex_dump_bytes("", DUMP_PREFIX_OFFSET,
1275                                 pfirst->data, min_t(int, pfirst->len, 48));
1276                 }
1277 #endif
1278
1279                 /* Validate the superframe header */
1280                 dptr = (u8 *) (pfirst->data);
1281                 sublen = get_unaligned_le16(dptr);
1282                 check = get_unaligned_le16(dptr + sizeof(u16));
1283
1284                 chan = SDPCM_PACKET_CHANNEL(&dptr[SDPCM_FRAMETAG_LEN]);
1285                 seq = SDPCM_PACKET_SEQUENCE(&dptr[SDPCM_FRAMETAG_LEN]);
1286                 bus->nextlen = dptr[SDPCM_FRAMETAG_LEN + SDPCM_NEXTLEN_OFFSET];
1287                 if ((bus->nextlen << 4) > MAX_RX_DATASZ) {
1288                         brcmf_dbg(INFO, "nextlen too large (%d) seq %d\n",
1289                                   bus->nextlen, seq);
1290                         bus->nextlen = 0;
1291                 }
1292                 doff = SDPCM_DOFFSET_VALUE(&dptr[SDPCM_FRAMETAG_LEN]);
1293                 txmax = SDPCM_WINDOW_VALUE(&dptr[SDPCM_FRAMETAG_LEN]);
1294
1295                 errcode = 0;
1296                 if ((u16)~(sublen ^ check)) {
1297                         brcmf_dbg(ERROR, "(superframe): HW hdr error: len/check 0x%04x/0x%04x\n",
1298                                   sublen, check);
1299                         errcode = -1;
1300                 } else if (roundup(sublen, bus->blocksize) != dlen) {
1301                         brcmf_dbg(ERROR, "(superframe): len 0x%04x, rounded 0x%04x, expect 0x%04x\n",
1302                                   sublen, roundup(sublen, bus->blocksize),
1303                                   dlen);
1304                         errcode = -1;
1305                 } else if (SDPCM_PACKET_CHANNEL(&dptr[SDPCM_FRAMETAG_LEN]) !=
1306                            SDPCM_GLOM_CHANNEL) {
1307                         brcmf_dbg(ERROR, "(superframe): bad channel %d\n",
1308                                   SDPCM_PACKET_CHANNEL(
1309                                           &dptr[SDPCM_FRAMETAG_LEN]));
1310                         errcode = -1;
1311                 } else if (SDPCM_GLOMDESC(&dptr[SDPCM_FRAMETAG_LEN])) {
1312                         brcmf_dbg(ERROR, "(superframe): got 2nd descriptor?\n");
1313                         errcode = -1;
1314                 } else if ((doff < SDPCM_HDRLEN) ||
1315                            (doff > (pfirst->len - SDPCM_HDRLEN))) {
1316                         brcmf_dbg(ERROR, "(superframe): Bad data offset %d: HW %d pkt %d min %d\n",
1317                                   doff, sublen, pfirst->len, SDPCM_HDRLEN);
1318                         errcode = -1;
1319                 }
1320
1321                 /* Check sequence number of superframe SW header */
1322                 if (rxseq != seq) {
1323                         brcmf_dbg(INFO, "(superframe) rx_seq %d, expected %d\n",
1324                                   seq, rxseq);
1325                         bus->rx_badseq++;
1326                         rxseq = seq;
1327                 }
1328
1329                 /* Check window for sanity */
1330                 if ((u8) (txmax - bus->tx_seq) > 0x40) {
1331                         brcmf_dbg(ERROR, "unlikely tx max %d with tx_seq %d\n",
1332                                   txmax, bus->tx_seq);
1333                         txmax = bus->tx_seq + 2;
1334                 }
1335                 bus->tx_max = txmax;
1336
1337                 /* Remove superframe header, remember offset */
1338                 skb_pull(pfirst, doff);
1339                 sfdoff = doff;
1340                 num = 0;
1341
1342                 /* Validate all the subframe headers */
1343                 skb_queue_walk(&bus->glom, pnext) {
1344                         /* leave when invalid subframe is found */
1345                         if (errcode)
1346                                 break;
1347
1348                         dptr = (u8 *) (pnext->data);
1349                         dlen = (u16) (pnext->len);
1350                         sublen = get_unaligned_le16(dptr);
1351                         check = get_unaligned_le16(dptr + sizeof(u16));
1352                         chan = SDPCM_PACKET_CHANNEL(&dptr[SDPCM_FRAMETAG_LEN]);
1353                         doff = SDPCM_DOFFSET_VALUE(&dptr[SDPCM_FRAMETAG_LEN]);
1354 #ifdef BCMDBG
1355                         if (BRCMF_GLOM_ON()) {
1356                                 printk(KERN_DEBUG "subframe:\n");
1357                                 print_hex_dump_bytes("", DUMP_PREFIX_OFFSET,
1358                                                      dptr, 32);
1359                         }
1360 #endif
1361
1362                         if ((u16)~(sublen ^ check)) {
1363                                 brcmf_dbg(ERROR, "(subframe %d): HW hdr error: len/check 0x%04x/0x%04x\n",
1364                                           num, sublen, check);
1365                                 errcode = -1;
1366                         } else if ((sublen > dlen) || (sublen < SDPCM_HDRLEN)) {
1367                                 brcmf_dbg(ERROR, "(subframe %d): length mismatch: len 0x%04x, expect 0x%04x\n",
1368                                           num, sublen, dlen);
1369                                 errcode = -1;
1370                         } else if ((chan != SDPCM_DATA_CHANNEL) &&
1371                                    (chan != SDPCM_EVENT_CHANNEL)) {
1372                                 brcmf_dbg(ERROR, "(subframe %d): bad channel %d\n",
1373                                           num, chan);
1374                                 errcode = -1;
1375                         } else if ((doff < SDPCM_HDRLEN) || (doff > sublen)) {
1376                                 brcmf_dbg(ERROR, "(subframe %d): Bad data offset %d: HW %d min %d\n",
1377                                           num, doff, sublen, SDPCM_HDRLEN);
1378                                 errcode = -1;
1379                         }
1380                         /* increase the subframe count */
1381                         num++;
1382                 }
1383
1384                 if (errcode) {
1385                         /* Terminate frame on error, request
1386                                  a couple retries */
1387                         if (bus->glomerr++ < 3) {
1388                                 /* Restore superframe header space */
1389                                 skb_push(pfirst, sfdoff);
1390                                 brcmf_sdbrcm_rxfail(bus, true, true);
1391                         } else {
1392                                 bus->glomerr = 0;
1393                                 brcmf_sdbrcm_rxfail(bus, true, false);
1394                                 bus->rxglomfail++;
1395                                 brcmf_sdbrcm_free_glom(bus);
1396                         }
1397                         bus->nextlen = 0;
1398                         return 0;
1399                 }
1400
1401                 /* Basic SD framing looks ok - process each packet (header) */
1402
1403                 skb_queue_walk_safe(&bus->glom, pfirst, pnext) {
1404                         dptr = (u8 *) (pfirst->data);
1405                         sublen = get_unaligned_le16(dptr);
1406                         chan = SDPCM_PACKET_CHANNEL(&dptr[SDPCM_FRAMETAG_LEN]);
1407                         seq = SDPCM_PACKET_SEQUENCE(&dptr[SDPCM_FRAMETAG_LEN]);
1408                         doff = SDPCM_DOFFSET_VALUE(&dptr[SDPCM_FRAMETAG_LEN]);
1409
1410                         brcmf_dbg(GLOM, "Get subframe %d, %p(%p/%d), sublen %d chan %d seq %d\n",
1411                                   num, pfirst, pfirst->data,
1412                                   pfirst->len, sublen, chan, seq);
1413
1414                         /* precondition: chan == SDPCM_DATA_CHANNEL ||
1415                                          chan == SDPCM_EVENT_CHANNEL */
1416
1417                         if (rxseq != seq) {
1418                                 brcmf_dbg(GLOM, "rx_seq %d, expected %d\n",
1419                                           seq, rxseq);
1420                                 bus->rx_badseq++;
1421                                 rxseq = seq;
1422                         }
1423                         rxseq++;
1424
1425 #ifdef BCMDBG
1426                         if (BRCMF_BYTES_ON() && BRCMF_DATA_ON()) {
1427                                 printk(KERN_DEBUG "Rx Subframe Data:\n");
1428                                 print_hex_dump_bytes("", DUMP_PREFIX_OFFSET,
1429                                                      dptr, dlen);
1430                         }
1431 #endif
1432
1433                         __skb_trim(pfirst, sublen);
1434                         skb_pull(pfirst, doff);
1435
1436                         if (pfirst->len == 0) {
1437                                 skb_unlink(pfirst, &bus->glom);
1438                                 brcmu_pkt_buf_free_skb(pfirst);
1439                                 continue;
1440                         } else if (brcmf_proto_hdrpull(bus->drvr, &ifidx,
1441                                                        pfirst) != 0) {
1442                                 brcmf_dbg(ERROR, "rx protocol error\n");
1443                                 bus->drvr->rx_errors++;
1444                                 skb_unlink(pfirst, &bus->glom);
1445                                 brcmu_pkt_buf_free_skb(pfirst);
1446                                 continue;
1447                         }
1448
1449 #ifdef BCMDBG
1450                         if (BRCMF_GLOM_ON()) {
1451                                 brcmf_dbg(GLOM, "subframe %d to stack, %p (%p/%d) nxt/lnk %p/%p\n",
1452                                           bus->glom.qlen, pfirst, pfirst->data,
1453                                           pfirst->len, pfirst->next,
1454                                           pfirst->prev);
1455                                 print_hex_dump_bytes("", DUMP_PREFIX_OFFSET,
1456                                                 pfirst->data,
1457                                                 min_t(int, pfirst->len, 32));
1458                         }
1459 #endif                          /* BCMDBG */
1460                 }
1461                 /* sent any remaining packets up */
1462                 if (bus->glom.qlen) {
1463                         up(&bus->sdsem);
1464                         brcmf_rx_frame(bus->drvr, ifidx, &bus->glom);
1465                         down(&bus->sdsem);
1466                 }
1467
1468                 bus->rxglomframes++;
1469                 bus->rxglompkts += bus->glom.qlen;
1470         }
1471         return num;
1472 }
1473
1474 static int brcmf_sdbrcm_dcmd_resp_wait(struct brcmf_sdio *bus, uint *condition,
1475                                         bool *pending)
1476 {
1477         DECLARE_WAITQUEUE(wait, current);
1478         int timeout = msecs_to_jiffies(DCMD_RESP_TIMEOUT);
1479
1480         /* Wait until control frame is available */
1481         add_wait_queue(&bus->dcmd_resp_wait, &wait);
1482         set_current_state(TASK_INTERRUPTIBLE);
1483
1484         while (!(*condition) && (!signal_pending(current) && timeout))
1485                 timeout = schedule_timeout(timeout);
1486
1487         if (signal_pending(current))
1488                 *pending = true;
1489
1490         set_current_state(TASK_RUNNING);
1491         remove_wait_queue(&bus->dcmd_resp_wait, &wait);
1492
1493         return timeout;
1494 }
1495
1496 static int brcmf_sdbrcm_dcmd_resp_wake(struct brcmf_sdio *bus)
1497 {
1498         if (waitqueue_active(&bus->dcmd_resp_wait))
1499                 wake_up_interruptible(&bus->dcmd_resp_wait);
1500
1501         return 0;
1502 }
1503 static void
1504 brcmf_sdbrcm_read_control(struct brcmf_sdio *bus, u8 *hdr, uint len, uint doff)
1505 {
1506         uint rdlen, pad;
1507
1508         int sdret;
1509
1510         brcmf_dbg(TRACE, "Enter\n");
1511
1512         /* Set rxctl for frame (w/optional alignment) */
1513         bus->rxctl = bus->rxbuf;
1514         bus->rxctl += BRCMF_FIRSTREAD;
1515         pad = ((unsigned long)bus->rxctl % BRCMF_SDALIGN);
1516         if (pad)
1517                 bus->rxctl += (BRCMF_SDALIGN - pad);
1518         bus->rxctl -= BRCMF_FIRSTREAD;
1519
1520         /* Copy the already-read portion over */
1521         memcpy(bus->rxctl, hdr, BRCMF_FIRSTREAD);
1522         if (len <= BRCMF_FIRSTREAD)
1523                 goto gotpkt;
1524
1525         /* Raise rdlen to next SDIO block to avoid tail command */
1526         rdlen = len - BRCMF_FIRSTREAD;
1527         if (bus->roundup && bus->blocksize && (rdlen > bus->blocksize)) {
1528                 pad = bus->blocksize - (rdlen % bus->blocksize);
1529                 if ((pad <= bus->roundup) && (pad < bus->blocksize) &&
1530                     ((len + pad) < bus->drvr->maxctl))
1531                         rdlen += pad;
1532         } else if (rdlen % BRCMF_SDALIGN) {
1533                 rdlen += BRCMF_SDALIGN - (rdlen % BRCMF_SDALIGN);
1534         }
1535
1536         /* Satisfy length-alignment requirements */
1537         if (rdlen & (ALIGNMENT - 1))
1538                 rdlen = roundup(rdlen, ALIGNMENT);
1539
1540         /* Drop if the read is too big or it exceeds our maximum */
1541         if ((rdlen + BRCMF_FIRSTREAD) > bus->drvr->maxctl) {
1542                 brcmf_dbg(ERROR, "%d-byte control read exceeds %d-byte buffer\n",
1543                           rdlen, bus->drvr->maxctl);
1544                 bus->drvr->rx_errors++;
1545                 brcmf_sdbrcm_rxfail(bus, false, false);
1546                 goto done;
1547         }
1548
1549         if ((len - doff) > bus->drvr->maxctl) {
1550                 brcmf_dbg(ERROR, "%d-byte ctl frame (%d-byte ctl data) exceeds %d-byte limit\n",
1551                           len, len - doff, bus->drvr->maxctl);
1552                 bus->drvr->rx_errors++;
1553                 bus->rx_toolong++;
1554                 brcmf_sdbrcm_rxfail(bus, false, false);
1555                 goto done;
1556         }
1557
1558         /* Read remainder of frame body into the rxctl buffer */
1559         sdret = brcmf_sdcard_recv_buf(bus->sdiodev,
1560                                 bus->sdiodev->sbwad,
1561                                 SDIO_FUNC_2,
1562                                 F2SYNC, (bus->rxctl + BRCMF_FIRSTREAD), rdlen);
1563         bus->f2rxdata++;
1564
1565         /* Control frame failures need retransmission */
1566         if (sdret < 0) {
1567                 brcmf_dbg(ERROR, "read %d control bytes failed: %d\n",
1568                           rdlen, sdret);
1569                 bus->rxc_errors++;
1570                 brcmf_sdbrcm_rxfail(bus, true, true);
1571                 goto done;
1572         }
1573
1574 gotpkt:
1575
1576 #ifdef BCMDBG
1577         if (BRCMF_BYTES_ON() && BRCMF_CTL_ON()) {
1578                 printk(KERN_DEBUG "RxCtrl:\n");
1579                 print_hex_dump_bytes("", DUMP_PREFIX_OFFSET, bus->rxctl, len);
1580         }
1581 #endif
1582
1583         /* Point to valid data and indicate its length */
1584         bus->rxctl += doff;
1585         bus->rxlen = len - doff;
1586
1587 done:
1588         /* Awake any waiters */
1589         brcmf_sdbrcm_dcmd_resp_wake(bus);
1590 }
1591
1592 /* Pad read to blocksize for efficiency */
1593 static void brcmf_pad(struct brcmf_sdio *bus, u16 *pad, u16 *rdlen)
1594 {
1595         if (bus->roundup && bus->blocksize && *rdlen > bus->blocksize) {
1596                 *pad = bus->blocksize - (*rdlen % bus->blocksize);
1597                 if (*pad <= bus->roundup && *pad < bus->blocksize &&
1598                     *rdlen + *pad + BRCMF_FIRSTREAD < MAX_RX_DATASZ)
1599                         *rdlen += *pad;
1600         } else if (*rdlen % BRCMF_SDALIGN) {
1601                 *rdlen += BRCMF_SDALIGN - (*rdlen % BRCMF_SDALIGN);
1602         }
1603 }
1604
1605 static void
1606 brcmf_alloc_pkt_and_read(struct brcmf_sdio *bus, u16 rdlen,
1607                          struct sk_buff **pkt, u8 **rxbuf)
1608 {
1609         int sdret;              /* Return code from calls */
1610
1611         *pkt = brcmu_pkt_buf_get_skb(rdlen + BRCMF_SDALIGN);
1612         if (*pkt == NULL)
1613                 return;
1614
1615         pkt_align(*pkt, rdlen, BRCMF_SDALIGN);
1616         *rxbuf = (u8 *) ((*pkt)->data);
1617         /* Read the entire frame */
1618         sdret = brcmf_sdcard_recv_pkt(bus->sdiodev, bus->sdiodev->sbwad,
1619                                       SDIO_FUNC_2, F2SYNC, *pkt);
1620         bus->f2rxdata++;
1621
1622         if (sdret < 0) {
1623                 brcmf_dbg(ERROR, "(nextlen): read %d bytes failed: %d\n",
1624                           rdlen, sdret);
1625                 brcmu_pkt_buf_free_skb(*pkt);
1626                 bus->drvr->rx_errors++;
1627                 /* Force retry w/normal header read.
1628                  * Don't attempt NAK for
1629                  * gSPI
1630                  */
1631                 brcmf_sdbrcm_rxfail(bus, true, true);
1632                 *pkt = NULL;
1633         }
1634 }
1635
1636 /* Checks the header */
1637 static int
1638 brcmf_check_rxbuf(struct brcmf_sdio *bus, struct sk_buff *pkt, u8 *rxbuf,
1639                   u8 rxseq, u16 nextlen, u16 *len)
1640 {
1641         u16 check;
1642         bool len_consistent;    /* Result of comparing readahead len and
1643                                    len from hw-hdr */
1644
1645         memcpy(bus->rxhdr, rxbuf, SDPCM_HDRLEN);
1646
1647         /* Extract hardware header fields */
1648         *len = get_unaligned_le16(bus->rxhdr);
1649         check = get_unaligned_le16(bus->rxhdr + sizeof(u16));
1650
1651         /* All zeros means readahead info was bad */
1652         if (!(*len | check)) {
1653                 brcmf_dbg(INFO, "(nextlen): read zeros in HW header???\n");
1654                 goto fail;
1655         }
1656
1657         /* Validate check bytes */
1658         if ((u16)~(*len ^ check)) {
1659                 brcmf_dbg(ERROR, "(nextlen): HW hdr error: nextlen/len/check 0x%04x/0x%04x/0x%04x\n",
1660                           nextlen, *len, check);
1661                 bus->rx_badhdr++;
1662                 brcmf_sdbrcm_rxfail(bus, false, false);
1663                 goto fail;
1664         }
1665
1666         /* Validate frame length */
1667         if (*len < SDPCM_HDRLEN) {
1668                 brcmf_dbg(ERROR, "(nextlen): HW hdr length invalid: %d\n",
1669                           *len);
1670                 goto fail;
1671         }
1672
1673         /* Check for consistency with readahead info */
1674         len_consistent = (nextlen != (roundup(*len, 16) >> 4));
1675         if (len_consistent) {
1676                 /* Mismatch, force retry w/normal
1677                         header (may be >4K) */
1678                 brcmf_dbg(ERROR, "(nextlen): mismatch, nextlen %d len %d rnd %d; expected rxseq %d\n",
1679                           nextlen, *len, roundup(*len, 16),
1680                           rxseq);
1681                 brcmf_sdbrcm_rxfail(bus, true, true);
1682                 goto fail;
1683         }
1684
1685         return 0;
1686
1687 fail:
1688         brcmf_sdbrcm_pktfree2(bus, pkt);
1689         return -EINVAL;
1690 }
1691
1692 /* Return true if there may be more frames to read */
1693 static uint
1694 brcmf_sdbrcm_readframes(struct brcmf_sdio *bus, uint maxframes, bool *finished)
1695 {
1696         u16 len, check; /* Extracted hardware header fields */
1697         u8 chan, seq, doff;     /* Extracted software header fields */
1698         u8 fcbits;              /* Extracted fcbits from software header */
1699
1700         struct sk_buff *pkt;            /* Packet for event or data frames */
1701         u16 pad;                /* Number of pad bytes to read */
1702         u16 rdlen;              /* Total number of bytes to read */
1703         u8 rxseq;               /* Next sequence number to expect */
1704         uint rxleft = 0;        /* Remaining number of frames allowed */
1705         int sdret;              /* Return code from calls */
1706         u8 txmax;               /* Maximum tx sequence offered */
1707         u8 *rxbuf;
1708         int ifidx = 0;
1709         uint rxcount = 0;       /* Total frames read */
1710
1711         brcmf_dbg(TRACE, "Enter\n");
1712
1713         /* Not finished unless we encounter no more frames indication */
1714         *finished = false;
1715
1716         for (rxseq = bus->rx_seq, rxleft = maxframes;
1717              !bus->rxskip && rxleft &&
1718              bus->drvr->bus_if->state != BRCMF_BUS_DOWN;
1719              rxseq++, rxleft--) {
1720
1721                 /* Handle glomming separately */
1722                 if (bus->glomd || !skb_queue_empty(&bus->glom)) {
1723                         u8 cnt;
1724                         brcmf_dbg(GLOM, "calling rxglom: glomd %p, glom %p\n",
1725                                   bus->glomd, skb_peek(&bus->glom));
1726                         cnt = brcmf_sdbrcm_rxglom(bus, rxseq);
1727                         brcmf_dbg(GLOM, "rxglom returned %d\n", cnt);
1728                         rxseq += cnt - 1;
1729                         rxleft = (rxleft > cnt) ? (rxleft - cnt) : 1;
1730                         continue;
1731                 }
1732
1733                 /* Try doing single read if we can */
1734                 if (bus->nextlen) {
1735                         u16 nextlen = bus->nextlen;
1736                         bus->nextlen = 0;
1737
1738                         rdlen = len = nextlen << 4;
1739                         brcmf_pad(bus, &pad, &rdlen);
1740
1741                         /*
1742                          * After the frame is received we have to
1743                          * distinguish whether it is data
1744                          * or non-data frame.
1745                          */
1746                         brcmf_alloc_pkt_and_read(bus, rdlen, &pkt, &rxbuf);
1747                         if (pkt == NULL) {
1748                                 /* Give up on data, request rtx of events */
1749                                 brcmf_dbg(ERROR, "(nextlen): brcmf_alloc_pkt_and_read failed: len %d rdlen %d expected rxseq %d\n",
1750                                           len, rdlen, rxseq);
1751                                 continue;
1752                         }
1753
1754                         if (brcmf_check_rxbuf(bus, pkt, rxbuf, rxseq, nextlen,
1755                                               &len) < 0)
1756                                 continue;
1757
1758                         /* Extract software header fields */
1759                         chan = SDPCM_PACKET_CHANNEL(
1760                                         &bus->rxhdr[SDPCM_FRAMETAG_LEN]);
1761                         seq = SDPCM_PACKET_SEQUENCE(
1762                                         &bus->rxhdr[SDPCM_FRAMETAG_LEN]);
1763                         doff = SDPCM_DOFFSET_VALUE(
1764                                         &bus->rxhdr[SDPCM_FRAMETAG_LEN]);
1765                         txmax = SDPCM_WINDOW_VALUE(
1766                                         &bus->rxhdr[SDPCM_FRAMETAG_LEN]);
1767
1768                         bus->nextlen =
1769                             bus->rxhdr[SDPCM_FRAMETAG_LEN +
1770                                        SDPCM_NEXTLEN_OFFSET];
1771                         if ((bus->nextlen << 4) > MAX_RX_DATASZ) {
1772                                 brcmf_dbg(INFO, "(nextlen): got frame w/nextlen too large (%d), seq %d\n",
1773                                           bus->nextlen, seq);
1774                                 bus->nextlen = 0;
1775                         }
1776
1777                         bus->drvr->rx_readahead_cnt++;
1778
1779                         /* Handle Flow Control */
1780                         fcbits = SDPCM_FCMASK_VALUE(
1781                                         &bus->rxhdr[SDPCM_FRAMETAG_LEN]);
1782
1783                         if (bus->flowcontrol != fcbits) {
1784                                 if (~bus->flowcontrol & fcbits)
1785                                         bus->fc_xoff++;
1786
1787                                 if (bus->flowcontrol & ~fcbits)
1788                                         bus->fc_xon++;
1789
1790                                 bus->fc_rcvd++;
1791                                 bus->flowcontrol = fcbits;
1792                         }
1793
1794                         /* Check and update sequence number */
1795                         if (rxseq != seq) {
1796                                 brcmf_dbg(INFO, "(nextlen): rx_seq %d, expected %d\n",
1797                                           seq, rxseq);
1798                                 bus->rx_badseq++;
1799                                 rxseq = seq;
1800                         }
1801
1802                         /* Check window for sanity */
1803                         if ((u8) (txmax - bus->tx_seq) > 0x40) {
1804                                 brcmf_dbg(ERROR, "got unlikely tx max %d with tx_seq %d\n",
1805                                           txmax, bus->tx_seq);
1806                                 txmax = bus->tx_seq + 2;
1807                         }
1808                         bus->tx_max = txmax;
1809
1810 #ifdef BCMDBG
1811                         if (BRCMF_BYTES_ON() && BRCMF_DATA_ON()) {
1812                                 printk(KERN_DEBUG "Rx Data:\n");
1813                                 print_hex_dump_bytes("", DUMP_PREFIX_OFFSET,
1814                                                      rxbuf, len);
1815                         } else if (BRCMF_HDRS_ON()) {
1816                                 printk(KERN_DEBUG "RxHdr:\n");
1817                                 print_hex_dump_bytes("", DUMP_PREFIX_OFFSET,
1818                                                      bus->rxhdr, SDPCM_HDRLEN);
1819                         }
1820 #endif
1821
1822                         if (chan == SDPCM_CONTROL_CHANNEL) {
1823                                 brcmf_dbg(ERROR, "(nextlen): readahead on control packet %d?\n",
1824                                           seq);
1825                                 /* Force retry w/normal header read */
1826                                 bus->nextlen = 0;
1827                                 brcmf_sdbrcm_rxfail(bus, false, true);
1828                                 brcmf_sdbrcm_pktfree2(bus, pkt);
1829                                 continue;
1830                         }
1831
1832                         /* Validate data offset */
1833                         if ((doff < SDPCM_HDRLEN) || (doff > len)) {
1834                                 brcmf_dbg(ERROR, "(nextlen): bad data offset %d: HW len %d min %d\n",
1835                                           doff, len, SDPCM_HDRLEN);
1836                                 brcmf_sdbrcm_rxfail(bus, false, false);
1837                                 brcmf_sdbrcm_pktfree2(bus, pkt);
1838                                 continue;
1839                         }
1840
1841                         /* All done with this one -- now deliver the packet */
1842                         goto deliver;
1843                 }
1844
1845                 /* Read frame header (hardware and software) */
1846                 sdret = brcmf_sdcard_recv_buf(bus->sdiodev, bus->sdiodev->sbwad,
1847                                               SDIO_FUNC_2, F2SYNC, bus->rxhdr,
1848                                               BRCMF_FIRSTREAD);
1849                 bus->f2rxhdrs++;
1850
1851                 if (sdret < 0) {
1852                         brcmf_dbg(ERROR, "RXHEADER FAILED: %d\n", sdret);
1853                         bus->rx_hdrfail++;
1854                         brcmf_sdbrcm_rxfail(bus, true, true);
1855                         continue;
1856                 }
1857 #ifdef BCMDBG
1858                 if (BRCMF_BYTES_ON() || BRCMF_HDRS_ON()) {
1859                         printk(KERN_DEBUG "RxHdr:\n");
1860                         print_hex_dump_bytes("", DUMP_PREFIX_OFFSET,
1861                                              bus->rxhdr, SDPCM_HDRLEN);
1862                 }
1863 #endif
1864
1865                 /* Extract hardware header fields */
1866                 len = get_unaligned_le16(bus->rxhdr);
1867                 check = get_unaligned_le16(bus->rxhdr + sizeof(u16));
1868
1869                 /* All zeros means no more frames */
1870                 if (!(len | check)) {
1871                         *finished = true;
1872                         break;
1873                 }
1874
1875                 /* Validate check bytes */
1876                 if ((u16) ~(len ^ check)) {
1877                         brcmf_dbg(ERROR, "HW hdr err: len/check 0x%04x/0x%04x\n",
1878                                   len, check);
1879                         bus->rx_badhdr++;
1880                         brcmf_sdbrcm_rxfail(bus, false, false);
1881                         continue;
1882                 }
1883
1884                 /* Validate frame length */
1885                 if (len < SDPCM_HDRLEN) {
1886                         brcmf_dbg(ERROR, "HW hdr length invalid: %d\n", len);
1887                         continue;
1888                 }
1889
1890                 /* Extract software header fields */
1891                 chan = SDPCM_PACKET_CHANNEL(&bus->rxhdr[SDPCM_FRAMETAG_LEN]);
1892                 seq = SDPCM_PACKET_SEQUENCE(&bus->rxhdr[SDPCM_FRAMETAG_LEN]);
1893                 doff = SDPCM_DOFFSET_VALUE(&bus->rxhdr[SDPCM_FRAMETAG_LEN]);
1894                 txmax = SDPCM_WINDOW_VALUE(&bus->rxhdr[SDPCM_FRAMETAG_LEN]);
1895
1896                 /* Validate data offset */
1897                 if ((doff < SDPCM_HDRLEN) || (doff > len)) {
1898                         brcmf_dbg(ERROR, "Bad data offset %d: HW len %d, min %d seq %d\n",
1899                                   doff, len, SDPCM_HDRLEN, seq);
1900                         bus->rx_badhdr++;
1901                         brcmf_sdbrcm_rxfail(bus, false, false);
1902                         continue;
1903                 }
1904
1905                 /* Save the readahead length if there is one */
1906                 bus->nextlen =
1907                     bus->rxhdr[SDPCM_FRAMETAG_LEN + SDPCM_NEXTLEN_OFFSET];
1908                 if ((bus->nextlen << 4) > MAX_RX_DATASZ) {
1909                         brcmf_dbg(INFO, "(nextlen): got frame w/nextlen too large (%d), seq %d\n",
1910                                   bus->nextlen, seq);
1911                         bus->nextlen = 0;
1912                 }
1913
1914                 /* Handle Flow Control */
1915                 fcbits = SDPCM_FCMASK_VALUE(&bus->rxhdr[SDPCM_FRAMETAG_LEN]);
1916
1917                 if (bus->flowcontrol != fcbits) {
1918                         if (~bus->flowcontrol & fcbits)
1919                                 bus->fc_xoff++;
1920
1921                         if (bus->flowcontrol & ~fcbits)
1922                                 bus->fc_xon++;
1923
1924                         bus->fc_rcvd++;
1925                         bus->flowcontrol = fcbits;
1926                 }
1927
1928                 /* Check and update sequence number */
1929                 if (rxseq != seq) {
1930                         brcmf_dbg(INFO, "rx_seq %d, expected %d\n", seq, rxseq);
1931                         bus->rx_badseq++;
1932                         rxseq = seq;
1933                 }
1934
1935                 /* Check window for sanity */
1936                 if ((u8) (txmax - bus->tx_seq) > 0x40) {
1937                         brcmf_dbg(ERROR, "unlikely tx max %d with tx_seq %d\n",
1938                                   txmax, bus->tx_seq);
1939                         txmax = bus->tx_seq + 2;
1940                 }
1941                 bus->tx_max = txmax;
1942
1943                 /* Call a separate function for control frames */
1944                 if (chan == SDPCM_CONTROL_CHANNEL) {
1945                         brcmf_sdbrcm_read_control(bus, bus->rxhdr, len, doff);
1946                         continue;
1947                 }
1948
1949                 /* precondition: chan is either SDPCM_DATA_CHANNEL,
1950                    SDPCM_EVENT_CHANNEL, SDPCM_TEST_CHANNEL or
1951                    SDPCM_GLOM_CHANNEL */
1952
1953                 /* Length to read */
1954                 rdlen = (len > BRCMF_FIRSTREAD) ? (len - BRCMF_FIRSTREAD) : 0;
1955
1956                 /* May pad read to blocksize for efficiency */
1957                 if (bus->roundup && bus->blocksize &&
1958                         (rdlen > bus->blocksize)) {
1959                         pad = bus->blocksize - (rdlen % bus->blocksize);
1960                         if ((pad <= bus->roundup) && (pad < bus->blocksize) &&
1961                             ((rdlen + pad + BRCMF_FIRSTREAD) < MAX_RX_DATASZ))
1962                                 rdlen += pad;
1963                 } else if (rdlen % BRCMF_SDALIGN) {
1964                         rdlen += BRCMF_SDALIGN - (rdlen % BRCMF_SDALIGN);
1965                 }
1966
1967                 /* Satisfy length-alignment requirements */
1968                 if (rdlen & (ALIGNMENT - 1))
1969                         rdlen = roundup(rdlen, ALIGNMENT);
1970
1971                 if ((rdlen + BRCMF_FIRSTREAD) > MAX_RX_DATASZ) {
1972                         /* Too long -- skip this frame */
1973                         brcmf_dbg(ERROR, "too long: len %d rdlen %d\n",
1974                                   len, rdlen);
1975                         bus->drvr->rx_errors++;
1976                         bus->rx_toolong++;
1977                         brcmf_sdbrcm_rxfail(bus, false, false);
1978                         continue;
1979                 }
1980
1981                 pkt = brcmu_pkt_buf_get_skb(rdlen +
1982                                             BRCMF_FIRSTREAD + BRCMF_SDALIGN);
1983                 if (!pkt) {
1984                         /* Give up on data, request rtx of events */
1985                         brcmf_dbg(ERROR, "brcmu_pkt_buf_get_skb failed: rdlen %d chan %d\n",
1986                                   rdlen, chan);
1987                         bus->drvr->rx_dropped++;
1988                         brcmf_sdbrcm_rxfail(bus, false, RETRYCHAN(chan));
1989                         continue;
1990                 }
1991
1992                 /* Leave room for what we already read, and align remainder */
1993                 skb_pull(pkt, BRCMF_FIRSTREAD);
1994                 pkt_align(pkt, rdlen, BRCMF_SDALIGN);
1995
1996                 /* Read the remaining frame data */
1997                 sdret = brcmf_sdcard_recv_pkt(bus->sdiodev, bus->sdiodev->sbwad,
1998                                               SDIO_FUNC_2, F2SYNC, pkt);
1999                 bus->f2rxdata++;
2000
2001                 if (sdret < 0) {
2002                         brcmf_dbg(ERROR, "read %d %s bytes failed: %d\n", rdlen,
2003                                   ((chan == SDPCM_EVENT_CHANNEL) ? "event"
2004                                    : ((chan == SDPCM_DATA_CHANNEL) ? "data"
2005                                       : "test")), sdret);
2006                         brcmu_pkt_buf_free_skb(pkt);
2007                         bus->drvr->rx_errors++;
2008                         brcmf_sdbrcm_rxfail(bus, true, RETRYCHAN(chan));
2009                         continue;
2010                 }
2011
2012                 /* Copy the already-read portion */
2013                 skb_push(pkt, BRCMF_FIRSTREAD);
2014                 memcpy(pkt->data, bus->rxhdr, BRCMF_FIRSTREAD);
2015
2016 #ifdef BCMDBG
2017                 if (BRCMF_BYTES_ON() && BRCMF_DATA_ON()) {
2018                         printk(KERN_DEBUG "Rx Data:\n");
2019                         print_hex_dump_bytes("", DUMP_PREFIX_OFFSET,
2020                                              pkt->data, len);
2021                 }
2022 #endif
2023
2024 deliver:
2025                 /* Save superframe descriptor and allocate packet frame */
2026                 if (chan == SDPCM_GLOM_CHANNEL) {
2027                         if (SDPCM_GLOMDESC(&bus->rxhdr[SDPCM_FRAMETAG_LEN])) {
2028                                 brcmf_dbg(GLOM, "glom descriptor, %d bytes:\n",
2029                                           len);
2030 #ifdef BCMDBG
2031                                 if (BRCMF_GLOM_ON()) {
2032                                         printk(KERN_DEBUG "Glom Data:\n");
2033                                         print_hex_dump_bytes("",
2034                                                              DUMP_PREFIX_OFFSET,
2035                                                              pkt->data, len);
2036                                 }
2037 #endif
2038                                 __skb_trim(pkt, len);
2039                                 skb_pull(pkt, SDPCM_HDRLEN);
2040                                 bus->glomd = pkt;
2041                         } else {
2042                                 brcmf_dbg(ERROR, "%s: glom superframe w/o "
2043                                           "descriptor!\n", __func__);
2044                                 brcmf_sdbrcm_rxfail(bus, false, false);
2045                         }
2046                         continue;
2047                 }
2048
2049                 /* Fill in packet len and prio, deliver upward */
2050                 __skb_trim(pkt, len);
2051                 skb_pull(pkt, doff);
2052
2053                 if (pkt->len == 0) {
2054                         brcmu_pkt_buf_free_skb(pkt);
2055                         continue;
2056                 } else if (brcmf_proto_hdrpull(bus->drvr, &ifidx, pkt) != 0) {
2057                         brcmf_dbg(ERROR, "rx protocol error\n");
2058                         brcmu_pkt_buf_free_skb(pkt);
2059                         bus->drvr->rx_errors++;
2060                         continue;
2061                 }
2062
2063                 /* Unlock during rx call */
2064                 up(&bus->sdsem);
2065                 brcmf_rx_packet(bus->drvr, ifidx, pkt);
2066                 down(&bus->sdsem);
2067         }
2068         rxcount = maxframes - rxleft;
2069 #ifdef BCMDBG
2070         /* Message if we hit the limit */
2071         if (!rxleft)
2072                 brcmf_dbg(DATA, "hit rx limit of %d frames\n",
2073                           maxframes);
2074         else
2075 #endif                          /* BCMDBG */
2076                 brcmf_dbg(DATA, "processed %d frames\n", rxcount);
2077         /* Back off rxseq if awaiting rtx, update rx_seq */
2078         if (bus->rxskip)
2079                 rxseq--;
2080         bus->rx_seq = rxseq;
2081
2082         return rxcount;
2083 }
2084
2085 static void
2086 brcmf_sdbrcm_wait_for_event(struct brcmf_sdio *bus, bool *lockvar)
2087 {
2088         up(&bus->sdsem);
2089         wait_event_interruptible_timeout(bus->ctrl_wait,
2090                                          (*lockvar == false), HZ * 2);
2091         down(&bus->sdsem);
2092         return;
2093 }
2094
2095 static void
2096 brcmf_sdbrcm_wait_event_wakeup(struct brcmf_sdio *bus)
2097 {
2098         if (waitqueue_active(&bus->ctrl_wait))
2099                 wake_up_interruptible(&bus->ctrl_wait);
2100         return;
2101 }
2102
2103 /* Writes a HW/SW header into the packet and sends it. */
2104 /* Assumes: (a) header space already there, (b) caller holds lock */
2105 static int brcmf_sdbrcm_txpkt(struct brcmf_sdio *bus, struct sk_buff *pkt,
2106                               uint chan, bool free_pkt)
2107 {
2108         int ret;
2109         u8 *frame;
2110         u16 len, pad = 0;
2111         u32 swheader;
2112         struct sk_buff *new;
2113         int i;
2114
2115         brcmf_dbg(TRACE, "Enter\n");
2116
2117         frame = (u8 *) (pkt->data);
2118
2119         /* Add alignment padding, allocate new packet if needed */
2120         pad = ((unsigned long)frame % BRCMF_SDALIGN);
2121         if (pad) {
2122                 if (skb_headroom(pkt) < pad) {
2123                         brcmf_dbg(INFO, "insufficient headroom %d for %d pad\n",
2124                                   skb_headroom(pkt), pad);
2125                         bus->drvr->tx_realloc++;
2126                         new = brcmu_pkt_buf_get_skb(pkt->len + BRCMF_SDALIGN);
2127                         if (!new) {
2128                                 brcmf_dbg(ERROR, "couldn't allocate new %d-byte packet\n",
2129                                           pkt->len + BRCMF_SDALIGN);
2130                                 ret = -ENOMEM;
2131                                 goto done;
2132                         }
2133
2134                         pkt_align(new, pkt->len, BRCMF_SDALIGN);
2135                         memcpy(new->data, pkt->data, pkt->len);
2136                         if (free_pkt)
2137                                 brcmu_pkt_buf_free_skb(pkt);
2138                         /* free the pkt if canned one is not used */
2139                         free_pkt = true;
2140                         pkt = new;
2141                         frame = (u8 *) (pkt->data);
2142                         /* precondition: (frame % BRCMF_SDALIGN) == 0) */
2143                         pad = 0;
2144                 } else {
2145                         skb_push(pkt, pad);
2146                         frame = (u8 *) (pkt->data);
2147                         /* precondition: pad + SDPCM_HDRLEN <= pkt->len */
2148                         memset(frame, 0, pad + SDPCM_HDRLEN);
2149                 }
2150         }
2151         /* precondition: pad < BRCMF_SDALIGN */
2152
2153         /* Hardware tag: 2 byte len followed by 2 byte ~len check (all LE) */
2154         len = (u16) (pkt->len);
2155         *(__le16 *) frame = cpu_to_le16(len);
2156         *(((__le16 *) frame) + 1) = cpu_to_le16(~len);
2157
2158         /* Software tag: channel, sequence number, data offset */
2159         swheader =
2160             ((chan << SDPCM_CHANNEL_SHIFT) & SDPCM_CHANNEL_MASK) | bus->tx_seq |
2161             (((pad +
2162                SDPCM_HDRLEN) << SDPCM_DOFFSET_SHIFT) & SDPCM_DOFFSET_MASK);
2163
2164         put_unaligned_le32(swheader, frame + SDPCM_FRAMETAG_LEN);
2165         put_unaligned_le32(0, frame + SDPCM_FRAMETAG_LEN + sizeof(swheader));
2166
2167 #ifdef BCMDBG
2168         tx_packets[pkt->priority]++;
2169         if (BRCMF_BYTES_ON() &&
2170             (((BRCMF_CTL_ON() && (chan == SDPCM_CONTROL_CHANNEL)) ||
2171               (BRCMF_DATA_ON() && (chan != SDPCM_CONTROL_CHANNEL))))) {
2172                 printk(KERN_DEBUG "Tx Frame:\n");
2173                 print_hex_dump_bytes("", DUMP_PREFIX_OFFSET, frame, len);
2174         } else if (BRCMF_HDRS_ON()) {
2175                 printk(KERN_DEBUG "TxHdr:\n");
2176                 print_hex_dump_bytes("", DUMP_PREFIX_OFFSET,
2177                                      frame, min_t(u16, len, 16));
2178         }
2179 #endif
2180
2181         /* Raise len to next SDIO block to eliminate tail command */
2182         if (bus->roundup && bus->blocksize && (len > bus->blocksize)) {
2183                 u16 pad = bus->blocksize - (len % bus->blocksize);
2184                 if ((pad <= bus->roundup) && (pad < bus->blocksize))
2185                                 len += pad;
2186         } else if (len % BRCMF_SDALIGN) {
2187                 len += BRCMF_SDALIGN - (len % BRCMF_SDALIGN);
2188         }
2189
2190         /* Some controllers have trouble with odd bytes -- round to even */
2191         if (len & (ALIGNMENT - 1))
2192                         len = roundup(len, ALIGNMENT);
2193
2194         ret = brcmf_sdcard_send_pkt(bus->sdiodev, bus->sdiodev->sbwad,
2195                                     SDIO_FUNC_2, F2SYNC, pkt);
2196         bus->f2txdata++;
2197
2198         if (ret < 0) {
2199                 /* On failure, abort the command and terminate the frame */
2200                 brcmf_dbg(INFO, "sdio error %d, abort command and terminate frame\n",
2201                           ret);
2202                 bus->tx_sderrs++;
2203
2204                 brcmf_sdcard_abort(bus->sdiodev, SDIO_FUNC_2);
2205                 brcmf_sdcard_cfg_write(bus->sdiodev, SDIO_FUNC_1,
2206                                  SBSDIO_FUNC1_FRAMECTRL, SFC_WF_TERM,
2207                                  NULL);
2208                 bus->f1regdata++;
2209
2210                 for (i = 0; i < 3; i++) {
2211                         u8 hi, lo;
2212                         hi = brcmf_sdcard_cfg_read(bus->sdiodev,
2213                                              SDIO_FUNC_1,
2214                                              SBSDIO_FUNC1_WFRAMEBCHI,
2215                                              NULL);
2216                         lo = brcmf_sdcard_cfg_read(bus->sdiodev,
2217                                              SDIO_FUNC_1,
2218                                              SBSDIO_FUNC1_WFRAMEBCLO,
2219                                              NULL);
2220                         bus->f1regdata += 2;
2221                         if ((hi == 0) && (lo == 0))
2222                                 break;
2223                 }
2224
2225         }
2226         if (ret == 0)
2227                 bus->tx_seq = (bus->tx_seq + 1) % SDPCM_SEQUENCE_WRAP;
2228
2229 done:
2230         /* restore pkt buffer pointer before calling tx complete routine */
2231         skb_pull(pkt, SDPCM_HDRLEN + pad);
2232         up(&bus->sdsem);
2233         brcmf_txcomplete(bus->drvr, pkt, ret != 0);
2234         down(&bus->sdsem);
2235
2236         if (free_pkt)
2237                 brcmu_pkt_buf_free_skb(pkt);
2238
2239         return ret;
2240 }
2241
2242 static uint brcmf_sdbrcm_sendfromq(struct brcmf_sdio *bus, uint maxframes)
2243 {
2244         struct sk_buff *pkt;
2245         u32 intstatus = 0;
2246         uint retries = 0;
2247         int ret = 0, prec_out;
2248         uint cnt = 0;
2249         uint datalen;
2250         u8 tx_prec_map;
2251
2252         struct brcmf_pub *drvr = bus->drvr;
2253
2254         brcmf_dbg(TRACE, "Enter\n");
2255
2256         tx_prec_map = ~bus->flowcontrol;
2257
2258         /* Send frames until the limit or some other event */
2259         for (cnt = 0; (cnt < maxframes) && data_ok(bus); cnt++) {
2260                 spin_lock_bh(&bus->txqlock);
2261                 pkt = brcmu_pktq_mdeq(&bus->txq, tx_prec_map, &prec_out);
2262                 if (pkt == NULL) {
2263                         spin_unlock_bh(&bus->txqlock);
2264                         break;
2265                 }
2266                 spin_unlock_bh(&bus->txqlock);
2267                 datalen = pkt->len - SDPCM_HDRLEN;
2268
2269                 ret = brcmf_sdbrcm_txpkt(bus, pkt, SDPCM_DATA_CHANNEL, true);
2270                 if (ret)
2271                         bus->drvr->tx_errors++;
2272                 else
2273                         bus->drvr->dstats.tx_bytes += datalen;
2274
2275                 /* In poll mode, need to check for other events */
2276                 if (!bus->intr && cnt) {
2277                         /* Check device status, signal pending interrupt */
2278                         r_sdreg32(bus, &intstatus,
2279                                   offsetof(struct sdpcmd_regs, intstatus),
2280                                   &retries);
2281                         bus->f2txdata++;
2282                         if (brcmf_sdcard_regfail(bus->sdiodev))
2283                                 break;
2284                         if (intstatus & bus->hostintmask)
2285                                 bus->ipend = true;
2286                 }
2287         }
2288
2289         /* Deflow-control stack if needed */
2290         if (drvr->up && (drvr->bus_if->state == BRCMF_BUS_DATA) &&
2291             drvr->txoff && (pktq_len(&bus->txq) < TXLOW))
2292                 brcmf_txflowcontrol(bus->sdiodev->dev, 0, OFF);
2293
2294         return cnt;
2295 }
2296
2297 static bool brcmf_sdbrcm_dpc(struct brcmf_sdio *bus)
2298 {
2299         u32 intstatus, newstatus = 0;
2300         uint retries = 0;
2301         uint rxlimit = bus->rxbound;    /* Rx frames to read before resched */
2302         uint txlimit = bus->txbound;    /* Tx frames to send before resched */
2303         uint framecnt = 0;      /* Temporary counter of tx/rx frames */
2304         bool rxdone = true;     /* Flag for no more read data */
2305         bool resched = false;   /* Flag indicating resched wanted */
2306
2307         brcmf_dbg(TRACE, "Enter\n");
2308
2309         /* Start with leftover status bits */
2310         intstatus = bus->intstatus;
2311
2312         down(&bus->sdsem);
2313
2314         /* If waiting for HTAVAIL, check status */
2315         if (bus->clkstate == CLK_PENDING) {
2316                 int err;
2317                 u8 clkctl, devctl = 0;
2318
2319 #ifdef BCMDBG
2320                 /* Check for inconsistent device control */
2321                 devctl = brcmf_sdcard_cfg_read(bus->sdiodev, SDIO_FUNC_1,
2322                                                SBSDIO_DEVICE_CTL, &err);
2323                 if (err) {
2324                         brcmf_dbg(ERROR, "error reading DEVCTL: %d\n", err);
2325                         bus->drvr->bus_if->state = BRCMF_BUS_DOWN;
2326                 }
2327 #endif                          /* BCMDBG */
2328
2329                 /* Read CSR, if clock on switch to AVAIL, else ignore */
2330                 clkctl = brcmf_sdcard_cfg_read(bus->sdiodev, SDIO_FUNC_1,
2331                                                SBSDIO_FUNC1_CHIPCLKCSR, &err);
2332                 if (err) {
2333                         brcmf_dbg(ERROR, "error reading CSR: %d\n",
2334                                   err);
2335                         bus->drvr->bus_if->state = BRCMF_BUS_DOWN;
2336                 }
2337
2338                 brcmf_dbg(INFO, "DPC: PENDING, devctl 0x%02x clkctl 0x%02x\n",
2339                           devctl, clkctl);
2340
2341                 if (SBSDIO_HTAV(clkctl)) {
2342                         devctl = brcmf_sdcard_cfg_read(bus->sdiodev,
2343                                                        SDIO_FUNC_1,
2344                                                        SBSDIO_DEVICE_CTL, &err);
2345                         if (err) {
2346                                 brcmf_dbg(ERROR, "error reading DEVCTL: %d\n",
2347                                           err);
2348                                 bus->drvr->bus_if->state = BRCMF_BUS_DOWN;
2349                         }
2350                         devctl &= ~SBSDIO_DEVCTL_CA_INT_ONLY;
2351                         brcmf_sdcard_cfg_write(bus->sdiodev, SDIO_FUNC_1,
2352                                 SBSDIO_DEVICE_CTL, devctl, &err);
2353                         if (err) {
2354                                 brcmf_dbg(ERROR, "error writing DEVCTL: %d\n",
2355                                           err);
2356                                 bus->drvr->bus_if->state = BRCMF_BUS_DOWN;
2357                         }
2358                         bus->clkstate = CLK_AVAIL;
2359                 } else {
2360                         goto clkwait;
2361                 }
2362         }
2363
2364         bus_wake(bus);
2365
2366         /* Make sure backplane clock is on */
2367         brcmf_sdbrcm_clkctl(bus, CLK_AVAIL, true);
2368         if (bus->clkstate == CLK_PENDING)
2369                 goto clkwait;
2370
2371         /* Pending interrupt indicates new device status */
2372         if (bus->ipend) {
2373                 bus->ipend = false;
2374                 r_sdreg32(bus, &newstatus,
2375                           offsetof(struct sdpcmd_regs, intstatus), &retries);
2376                 bus->f1regdata++;
2377                 if (brcmf_sdcard_regfail(bus->sdiodev))
2378                         newstatus = 0;
2379                 newstatus &= bus->hostintmask;
2380                 bus->fcstate = !!(newstatus & I_HMB_FC_STATE);
2381                 if (newstatus) {
2382                         w_sdreg32(bus, newstatus,
2383                                   offsetof(struct sdpcmd_regs, intstatus),
2384                                   &retries);
2385                         bus->f1regdata++;
2386                 }
2387         }
2388
2389         /* Merge new bits with previous */
2390         intstatus |= newstatus;
2391         bus->intstatus = 0;
2392
2393         /* Handle flow-control change: read new state in case our ack
2394          * crossed another change interrupt.  If change still set, assume
2395          * FC ON for safety, let next loop through do the debounce.
2396          */
2397         if (intstatus & I_HMB_FC_CHANGE) {
2398                 intstatus &= ~I_HMB_FC_CHANGE;
2399                 w_sdreg32(bus, I_HMB_FC_CHANGE,
2400                           offsetof(struct sdpcmd_regs, intstatus), &retries);
2401
2402                 r_sdreg32(bus, &newstatus,
2403                           offsetof(struct sdpcmd_regs, intstatus), &retries);
2404                 bus->f1regdata += 2;
2405                 bus->fcstate =
2406                     !!(newstatus & (I_HMB_FC_STATE | I_HMB_FC_CHANGE));
2407                 intstatus |= (newstatus & bus->hostintmask);
2408         }
2409
2410         /* Handle host mailbox indication */
2411         if (intstatus & I_HMB_HOST_INT) {
2412                 intstatus &= ~I_HMB_HOST_INT;
2413                 intstatus |= brcmf_sdbrcm_hostmail(bus);
2414         }
2415
2416         /* Generally don't ask for these, can get CRC errors... */
2417         if (intstatus & I_WR_OOSYNC) {
2418                 brcmf_dbg(ERROR, "Dongle reports WR_OOSYNC\n");
2419                 intstatus &= ~I_WR_OOSYNC;
2420         }
2421
2422         if (intstatus & I_RD_OOSYNC) {
2423                 brcmf_dbg(ERROR, "Dongle reports RD_OOSYNC\n");
2424                 intstatus &= ~I_RD_OOSYNC;
2425         }
2426
2427         if (intstatus & I_SBINT) {
2428                 brcmf_dbg(ERROR, "Dongle reports SBINT\n");
2429                 intstatus &= ~I_SBINT;
2430         }
2431
2432         /* Would be active due to wake-wlan in gSPI */
2433         if (intstatus & I_CHIPACTIVE) {
2434                 brcmf_dbg(INFO, "Dongle reports CHIPACTIVE\n");
2435                 intstatus &= ~I_CHIPACTIVE;
2436         }
2437
2438         /* Ignore frame indications if rxskip is set */
2439         if (bus->rxskip)
2440                 intstatus &= ~I_HMB_FRAME_IND;
2441
2442         /* On frame indication, read available frames */
2443         if (PKT_AVAILABLE()) {
2444                 framecnt = brcmf_sdbrcm_readframes(bus, rxlimit, &rxdone);
2445                 if (rxdone || bus->rxskip)
2446                         intstatus &= ~I_HMB_FRAME_IND;
2447                 rxlimit -= min(framecnt, rxlimit);
2448         }
2449
2450         /* Keep still-pending events for next scheduling */
2451         bus->intstatus = intstatus;
2452
2453 clkwait:
2454         if (data_ok(bus) && bus->ctrl_frame_stat &&
2455                 (bus->clkstate == CLK_AVAIL)) {
2456                 int ret, i;
2457
2458                 ret = brcmf_sdcard_send_buf(bus->sdiodev, bus->sdiodev->sbwad,
2459                         SDIO_FUNC_2, F2SYNC, (u8 *) bus->ctrl_frame_buf,
2460                         (u32) bus->ctrl_frame_len);
2461
2462                 if (ret < 0) {
2463                         /* On failure, abort the command and
2464                                 terminate the frame */
2465                         brcmf_dbg(INFO, "sdio error %d, abort command and terminate frame\n",
2466                                   ret);
2467                         bus->tx_sderrs++;
2468
2469                         brcmf_sdcard_abort(bus->sdiodev, SDIO_FUNC_2);
2470
2471                         brcmf_sdcard_cfg_write(bus->sdiodev, SDIO_FUNC_1,
2472                                          SBSDIO_FUNC1_FRAMECTRL, SFC_WF_TERM,
2473                                          NULL);
2474                         bus->f1regdata++;
2475
2476                         for (i = 0; i < 3; i++) {
2477                                 u8 hi, lo;
2478                                 hi = brcmf_sdcard_cfg_read(bus->sdiodev,
2479                                                      SDIO_FUNC_1,
2480                                                      SBSDIO_FUNC1_WFRAMEBCHI,
2481                                                      NULL);
2482                                 lo = brcmf_sdcard_cfg_read(bus->sdiodev,
2483                                                      SDIO_FUNC_1,
2484                                                      SBSDIO_FUNC1_WFRAMEBCLO,
2485                                                      NULL);
2486                                 bus->f1regdata += 2;
2487                                 if ((hi == 0) && (lo == 0))
2488                                         break;
2489                         }
2490
2491                 }
2492                 if (ret == 0)
2493                         bus->tx_seq = (bus->tx_seq + 1) % SDPCM_SEQUENCE_WRAP;
2494
2495                 brcmf_dbg(INFO, "Return_dpc value is : %d\n", ret);
2496                 bus->ctrl_frame_stat = false;
2497                 brcmf_sdbrcm_wait_event_wakeup(bus);
2498         }
2499         /* Send queued frames (limit 1 if rx may still be pending) */
2500         else if ((bus->clkstate == CLK_AVAIL) && !bus->fcstate &&
2501                  brcmu_pktq_mlen(&bus->txq, ~bus->flowcontrol) && txlimit
2502                  && data_ok(bus)) {
2503                 framecnt = rxdone ? txlimit : min(txlimit, bus->txminmax);
2504                 framecnt = brcmf_sdbrcm_sendfromq(bus, framecnt);
2505                 txlimit -= framecnt;
2506         }
2507
2508         /* Resched if events or tx frames are pending,
2509                  else await next interrupt */
2510         /* On failed register access, all bets are off:
2511                  no resched or interrupts */
2512         if ((bus->drvr->bus_if->state == BRCMF_BUS_DOWN) ||
2513             brcmf_sdcard_regfail(bus->sdiodev)) {
2514                 brcmf_dbg(ERROR, "failed backplane access over SDIO, halting operation %d\n",
2515                           brcmf_sdcard_regfail(bus->sdiodev));
2516                 bus->drvr->bus_if->state = BRCMF_BUS_DOWN;
2517                 bus->intstatus = 0;
2518         } else if (bus->clkstate == CLK_PENDING) {
2519                 brcmf_dbg(INFO, "rescheduled due to CLK_PENDING awaiting I_CHIPACTIVE interrupt\n");
2520                 resched = true;
2521         } else if (bus->intstatus || bus->ipend ||
2522                 (!bus->fcstate && brcmu_pktq_mlen(&bus->txq, ~bus->flowcontrol)
2523                  && data_ok(bus)) || PKT_AVAILABLE()) {
2524                 resched = true;
2525         }
2526
2527         bus->dpc_sched = resched;
2528
2529         /* If we're done for now, turn off clock request. */
2530         if ((bus->clkstate != CLK_PENDING)
2531             && bus->idletime == BRCMF_IDLE_IMMEDIATE) {
2532                 bus->activity = false;
2533                 brcmf_sdbrcm_clkctl(bus, CLK_NONE, false);
2534         }
2535
2536         up(&bus->sdsem);
2537
2538         return resched;
2539 }
2540
2541 static int brcmf_sdbrcm_dpc_thread(void *data)
2542 {
2543         struct brcmf_sdio *bus = (struct brcmf_sdio *) data;
2544
2545         allow_signal(SIGTERM);
2546         /* Run until signal received */
2547         while (1) {
2548                 if (kthread_should_stop())
2549                         break;
2550                 if (!wait_for_completion_interruptible(&bus->dpc_wait)) {
2551                         /* Call bus dpc unless it indicated down
2552                         (then clean stop) */
2553                         if (bus->drvr->bus_if->state != BRCMF_BUS_DOWN) {
2554                                 if (brcmf_sdbrcm_dpc(bus))
2555                                         complete(&bus->dpc_wait);
2556                         } else {
2557                                 /* after stopping the bus, exit thread */
2558                                 brcmf_sdbrcm_bus_stop(bus->sdiodev->dev);
2559                                 bus->dpc_tsk = NULL;
2560                                 break;
2561                         }
2562                 } else
2563                         break;
2564         }
2565         return 0;
2566 }
2567
2568 int brcmf_sdbrcm_bus_txdata(struct device *dev, struct sk_buff *pkt)
2569 {
2570         int ret = -EBADE;
2571         uint datalen, prec;
2572         struct brcmf_bus *bus_if = dev_get_drvdata(dev);
2573         struct brcmf_sdio_dev *sdiodev = bus_if->bus_priv;
2574         struct brcmf_sdio *bus = sdiodev->bus;
2575
2576         brcmf_dbg(TRACE, "Enter\n");
2577
2578         datalen = pkt->len;
2579
2580         /* Add space for the header */
2581         skb_push(pkt, SDPCM_HDRLEN);
2582         /* precondition: IS_ALIGNED((unsigned long)(pkt->data), 2) */
2583
2584         prec = prio2prec((pkt->priority & PRIOMASK));
2585
2586         /* Check for existing queue, current flow-control,
2587                          pending event, or pending clock */
2588         brcmf_dbg(TRACE, "deferring pktq len %d\n", pktq_len(&bus->txq));
2589         bus->fcqueued++;
2590
2591         /* Priority based enq */
2592         spin_lock_bh(&bus->txqlock);
2593         if (brcmf_c_prec_enq(bus->drvr, &bus->txq, pkt, prec) == false) {
2594                 skb_pull(pkt, SDPCM_HDRLEN);
2595                 brcmf_txcomplete(bus->drvr, pkt, false);
2596                 brcmu_pkt_buf_free_skb(pkt);
2597                 brcmf_dbg(ERROR, "out of bus->txq !!!\n");
2598                 ret = -ENOSR;
2599         } else {
2600                 ret = 0;
2601         }
2602         spin_unlock_bh(&bus->txqlock);
2603
2604         if (pktq_len(&bus->txq) >= TXHI)
2605                 brcmf_txflowcontrol(bus->sdiodev->dev, 0, ON);
2606
2607 #ifdef BCMDBG
2608         if (pktq_plen(&bus->txq, prec) > qcount[prec])
2609                 qcount[prec] = pktq_plen(&bus->txq, prec);
2610 #endif
2611         /* Schedule DPC if needed to send queued packet(s) */
2612         if (!bus->dpc_sched) {
2613                 bus->dpc_sched = true;
2614                 if (bus->dpc_tsk)
2615                         complete(&bus->dpc_wait);
2616         }
2617
2618         return ret;
2619 }
2620
2621 static int
2622 brcmf_sdbrcm_membytes(struct brcmf_sdio *bus, bool write, u32 address, u8 *data,
2623                  uint size)
2624 {
2625         int bcmerror = 0;
2626         u32 sdaddr;
2627         uint dsize;
2628
2629         /* Determine initial transfer parameters */
2630         sdaddr = address & SBSDIO_SB_OFT_ADDR_MASK;
2631         if ((sdaddr + size) & SBSDIO_SBWINDOW_MASK)
2632                 dsize = (SBSDIO_SB_OFT_ADDR_LIMIT - sdaddr);
2633         else
2634                 dsize = size;
2635
2636         /* Set the backplane window to include the start address */
2637         bcmerror = brcmf_sdcard_set_sbaddr_window(bus->sdiodev, address);
2638         if (bcmerror) {
2639                 brcmf_dbg(ERROR, "window change failed\n");
2640                 goto xfer_done;
2641         }
2642
2643         /* Do the transfer(s) */
2644         while (size) {
2645                 brcmf_dbg(INFO, "%s %d bytes at offset 0x%08x in window 0x%08x\n",
2646                           write ? "write" : "read", dsize,
2647                           sdaddr, address & SBSDIO_SBWINDOW_MASK);
2648                 bcmerror = brcmf_sdcard_rwdata(bus->sdiodev, write,
2649                                                sdaddr, data, dsize);
2650                 if (bcmerror) {
2651                         brcmf_dbg(ERROR, "membytes transfer failed\n");
2652                         break;
2653                 }
2654
2655                 /* Adjust for next transfer (if any) */
2656                 size -= dsize;
2657                 if (size) {
2658                         data += dsize;
2659                         address += dsize;
2660                         bcmerror = brcmf_sdcard_set_sbaddr_window(bus->sdiodev,
2661                                                                   address);
2662                         if (bcmerror) {
2663                                 brcmf_dbg(ERROR, "window change failed\n");
2664                                 break;
2665                         }
2666                         sdaddr = 0;
2667                         dsize = min_t(uint, SBSDIO_SB_OFT_ADDR_LIMIT, size);
2668                 }
2669         }
2670
2671 xfer_done:
2672         /* Return the window to backplane enumeration space for core access */
2673         if (brcmf_sdcard_set_sbaddr_window(bus->sdiodev, bus->sdiodev->sbwad))
2674                 brcmf_dbg(ERROR, "FAILED to set window back to 0x%x\n",
2675                           bus->sdiodev->sbwad);
2676
2677         return bcmerror;
2678 }
2679
2680 #ifdef BCMDBG
2681 #define CONSOLE_LINE_MAX        192
2682
2683 static int brcmf_sdbrcm_readconsole(struct brcmf_sdio *bus)
2684 {
2685         struct brcmf_console *c = &bus->console;
2686         u8 line[CONSOLE_LINE_MAX], ch;
2687         u32 n, idx, addr;
2688         int rv;
2689
2690         /* Don't do anything until FWREADY updates console address */
2691         if (bus->console_addr == 0)
2692                 return 0;
2693
2694         /* Read console log struct */
2695         addr = bus->console_addr + offsetof(struct rte_console, log_le);
2696         rv = brcmf_sdbrcm_membytes(bus, false, addr, (u8 *)&c->log_le,
2697                                    sizeof(c->log_le));
2698         if (rv < 0)
2699                 return rv;
2700
2701         /* Allocate console buffer (one time only) */
2702         if (c->buf == NULL) {
2703                 c->bufsize = le32_to_cpu(c->log_le.buf_size);
2704                 c->buf = kmalloc(c->bufsize, GFP_ATOMIC);
2705                 if (c->buf == NULL)
2706                         return -ENOMEM;
2707         }
2708
2709         idx = le32_to_cpu(c->log_le.idx);
2710
2711         /* Protect against corrupt value */
2712         if (idx > c->bufsize)
2713                 return -EBADE;
2714
2715         /* Skip reading the console buffer if the index pointer
2716          has not moved */
2717         if (idx == c->last)
2718                 return 0;
2719
2720         /* Read the console buffer */
2721         addr = le32_to_cpu(c->log_le.buf);
2722         rv = brcmf_sdbrcm_membytes(bus, false, addr, c->buf, c->bufsize);
2723         if (rv < 0)
2724                 return rv;
2725
2726         while (c->last != idx) {
2727                 for (n = 0; n < CONSOLE_LINE_MAX - 2; n++) {
2728                         if (c->last == idx) {
2729                                 /* This would output a partial line.
2730                                  * Instead, back up
2731                                  * the buffer pointer and output this
2732                                  * line next time around.
2733                                  */
2734                                 if (c->last >= n)
2735                                         c->last -= n;
2736                                 else
2737                                         c->last = c->bufsize - n;
2738                                 goto break2;
2739                         }
2740                         ch = c->buf[c->last];
2741                         c->last = (c->last + 1) % c->bufsize;
2742                         if (ch == '\n')
2743                                 break;
2744                         line[n] = ch;
2745                 }
2746
2747                 if (n > 0) {
2748                         if (line[n - 1] == '\r')
2749                                 n--;
2750                         line[n] = 0;
2751                         printk(KERN_DEBUG "CONSOLE: %s\n", line);
2752                 }
2753         }
2754 break2:
2755
2756         return 0;
2757 }
2758 #endif                          /* BCMDBG */
2759
2760 static int brcmf_tx_frame(struct brcmf_sdio *bus, u8 *frame, u16 len)
2761 {
2762         int i;
2763         int ret;
2764
2765         bus->ctrl_frame_stat = false;
2766         ret = brcmf_sdcard_send_buf(bus->sdiodev, bus->sdiodev->sbwad,
2767                                     SDIO_FUNC_2, F2SYNC, frame, len);
2768
2769         if (ret < 0) {
2770                 /* On failure, abort the command and terminate the frame */
2771                 brcmf_dbg(INFO, "sdio error %d, abort command and terminate frame\n",
2772                           ret);
2773                 bus->tx_sderrs++;
2774
2775                 brcmf_sdcard_abort(bus->sdiodev, SDIO_FUNC_2);
2776
2777                 brcmf_sdcard_cfg_write(bus->sdiodev, SDIO_FUNC_1,
2778                                        SBSDIO_FUNC1_FRAMECTRL,
2779                                        SFC_WF_TERM, NULL);
2780                 bus->f1regdata++;
2781
2782                 for (i = 0; i < 3; i++) {
2783                         u8 hi, lo;
2784                         hi = brcmf_sdcard_cfg_read(bus->sdiodev, SDIO_FUNC_1,
2785                                                    SBSDIO_FUNC1_WFRAMEBCHI,
2786                                                    NULL);
2787                         lo = brcmf_sdcard_cfg_read(bus->sdiodev, SDIO_FUNC_1,
2788                                                    SBSDIO_FUNC1_WFRAMEBCLO,
2789                                                    NULL);
2790                         bus->f1regdata += 2;
2791                         if (hi == 0 && lo == 0)
2792                                 break;
2793                 }
2794                 return ret;
2795         }
2796
2797         bus->tx_seq = (bus->tx_seq + 1) % SDPCM_SEQUENCE_WRAP;
2798
2799         return ret;
2800 }
2801
2802 int
2803 brcmf_sdbrcm_bus_txctl(struct device *dev, unsigned char *msg, uint msglen)
2804 {
2805         u8 *frame;
2806         u16 len;
2807         u32 swheader;
2808         uint retries = 0;
2809         u8 doff = 0;
2810         int ret = -1;
2811         struct brcmf_bus *bus_if = dev_get_drvdata(dev);
2812         struct brcmf_sdio_dev *sdiodev = bus_if->bus_priv;
2813         struct brcmf_sdio *bus = sdiodev->bus;
2814
2815         brcmf_dbg(TRACE, "Enter\n");
2816
2817         /* Back the pointer to make a room for bus header */
2818         frame = msg - SDPCM_HDRLEN;
2819         len = (msglen += SDPCM_HDRLEN);
2820
2821         /* Add alignment padding (optional for ctl frames) */
2822         doff = ((unsigned long)frame % BRCMF_SDALIGN);
2823         if (doff) {
2824                 frame -= doff;
2825                 len += doff;
2826                 msglen += doff;
2827                 memset(frame, 0, doff + SDPCM_HDRLEN);
2828         }
2829         /* precondition: doff < BRCMF_SDALIGN */
2830         doff += SDPCM_HDRLEN;
2831
2832         /* Round send length to next SDIO block */
2833         if (bus->roundup && bus->blocksize && (len > bus->blocksize)) {
2834                 u16 pad = bus->blocksize - (len % bus->blocksize);
2835                 if ((pad <= bus->roundup) && (pad < bus->blocksize))
2836                         len += pad;
2837         } else if (len % BRCMF_SDALIGN) {
2838                 len += BRCMF_SDALIGN - (len % BRCMF_SDALIGN);
2839         }
2840
2841         /* Satisfy length-alignment requirements */
2842         if (len & (ALIGNMENT - 1))
2843                 len = roundup(len, ALIGNMENT);
2844
2845         /* precondition: IS_ALIGNED((unsigned long)frame, 2) */
2846
2847         /* Need to lock here to protect txseq and SDIO tx calls */
2848         down(&bus->sdsem);
2849
2850         bus_wake(bus);
2851
2852         /* Make sure backplane clock is on */
2853         brcmf_sdbrcm_clkctl(bus, CLK_AVAIL, false);
2854
2855         /* Hardware tag: 2 byte len followed by 2 byte ~len check (all LE) */
2856         *(__le16 *) frame = cpu_to_le16((u16) msglen);
2857         *(((__le16 *) frame) + 1) = cpu_to_le16(~msglen);
2858
2859         /* Software tag: channel, sequence number, data offset */
2860         swheader =
2861             ((SDPCM_CONTROL_CHANNEL << SDPCM_CHANNEL_SHIFT) &
2862              SDPCM_CHANNEL_MASK)
2863             | bus->tx_seq | ((doff << SDPCM_DOFFSET_SHIFT) &
2864                              SDPCM_DOFFSET_MASK);
2865         put_unaligned_le32(swheader, frame + SDPCM_FRAMETAG_LEN);
2866         put_unaligned_le32(0, frame + SDPCM_FRAMETAG_LEN + sizeof(swheader));
2867
2868         if (!data_ok(bus)) {
2869                 brcmf_dbg(INFO, "No bus credit bus->tx_max %d, bus->tx_seq %d\n",
2870                           bus->tx_max, bus->tx_seq);
2871                 bus->ctrl_frame_stat = true;
2872                 /* Send from dpc */
2873                 bus->ctrl_frame_buf = frame;
2874                 bus->ctrl_frame_len = len;
2875
2876                 brcmf_sdbrcm_wait_for_event(bus, &bus->ctrl_frame_stat);
2877
2878                 if (bus->ctrl_frame_stat == false) {
2879                         brcmf_dbg(INFO, "ctrl_frame_stat == false\n");
2880                         ret = 0;
2881                 } else {
2882                         brcmf_dbg(INFO, "ctrl_frame_stat == true\n");
2883                         ret = -1;
2884                 }
2885         }
2886
2887         if (ret == -1) {
2888 #ifdef BCMDBG
2889                 if (BRCMF_BYTES_ON() && BRCMF_CTL_ON()) {
2890                         printk(KERN_DEBUG "Tx Frame:\n");
2891                         print_hex_dump_bytes("", DUMP_PREFIX_OFFSET,
2892                                              frame, len);
2893                 } else if (BRCMF_HDRS_ON()) {
2894                         printk(KERN_DEBUG "TxHdr:\n");
2895                         print_hex_dump_bytes("", DUMP_PREFIX_OFFSET,
2896                                              frame, min_t(u16, len, 16));
2897                 }
2898 #endif
2899
2900                 do {
2901                         ret = brcmf_tx_frame(bus, frame, len);
2902                 } while (ret < 0 && retries++ < TXRETRIES);
2903         }
2904
2905         if ((bus->idletime == BRCMF_IDLE_IMMEDIATE) && !bus->dpc_sched) {
2906                 bus->activity = false;
2907                 brcmf_sdbrcm_clkctl(bus, CLK_NONE, true);
2908         }
2909
2910         up(&bus->sdsem);
2911
2912         if (ret)
2913                 bus->drvr->tx_ctlerrs++;
2914         else
2915                 bus->drvr->tx_ctlpkts++;
2916
2917         return ret ? -EIO : 0;
2918 }
2919
2920 int
2921 brcmf_sdbrcm_bus_rxctl(struct device *dev, unsigned char *msg, uint msglen)
2922 {
2923         int timeleft;
2924         uint rxlen = 0;
2925         bool pending;
2926         struct brcmf_bus *bus_if = dev_get_drvdata(dev);
2927         struct brcmf_sdio_dev *sdiodev = bus_if->bus_priv;
2928         struct brcmf_sdio *bus = sdiodev->bus;
2929
2930         brcmf_dbg(TRACE, "Enter\n");
2931
2932         /* Wait until control frame is available */
2933         timeleft = brcmf_sdbrcm_dcmd_resp_wait(bus, &bus->rxlen, &pending);
2934
2935         down(&bus->sdsem);
2936         rxlen = bus->rxlen;
2937         memcpy(msg, bus->rxctl, min(msglen, rxlen));
2938         bus->rxlen = 0;
2939         up(&bus->sdsem);
2940
2941         if (rxlen) {
2942                 brcmf_dbg(CTL, "resumed on rxctl frame, got %d expected %d\n",
2943                           rxlen, msglen);
2944         } else if (timeleft == 0) {
2945                 brcmf_dbg(ERROR, "resumed on timeout\n");
2946         } else if (pending == true) {
2947                 brcmf_dbg(CTL, "cancelled\n");
2948                 return -ERESTARTSYS;
2949         } else {
2950                 brcmf_dbg(CTL, "resumed for unknown reason?\n");
2951         }
2952
2953         if (rxlen)
2954                 bus->drvr->rx_ctlpkts++;
2955         else
2956                 bus->drvr->rx_ctlerrs++;
2957
2958         return rxlen ? (int)rxlen : -ETIMEDOUT;
2959 }
2960
2961 static int brcmf_sdbrcm_downloadvars(struct brcmf_sdio *bus, void *arg, int len)
2962 {
2963         int bcmerror = 0;
2964
2965         brcmf_dbg(TRACE, "Enter\n");
2966
2967         /* Basic sanity checks */
2968         if (bus->drvr->up) {
2969                 bcmerror = -EISCONN;
2970                 goto err;
2971         }
2972         if (!len) {
2973                 bcmerror = -EOVERFLOW;
2974                 goto err;
2975         }
2976
2977         /* Free the old ones and replace with passed variables */
2978         kfree(bus->vars);
2979
2980         bus->vars = kmalloc(len, GFP_ATOMIC);
2981         bus->varsz = bus->vars ? len : 0;
2982         if (bus->vars == NULL) {
2983                 bcmerror = -ENOMEM;
2984                 goto err;
2985         }
2986
2987         /* Copy the passed variables, which should include the
2988                  terminating double-null */
2989         memcpy(bus->vars, arg, bus->varsz);
2990 err:
2991         return bcmerror;
2992 }
2993
2994 static int brcmf_sdbrcm_write_vars(struct brcmf_sdio *bus)
2995 {
2996         int bcmerror = 0;
2997         u32 varsize;
2998         u32 varaddr;
2999         u8 *vbuffer;
3000         u32 varsizew;
3001         __le32 varsizew_le;
3002 #ifdef BCMDBG
3003         char *nvram_ularray;
3004 #endif                          /* BCMDBG */
3005
3006         /* Even if there are no vars are to be written, we still
3007                  need to set the ramsize. */
3008         varsize = bus->varsz ? roundup(bus->varsz, 4) : 0;
3009         varaddr = (bus->ramsize - 4) - varsize;
3010
3011         if (bus->vars) {
3012                 vbuffer = kzalloc(varsize, GFP_ATOMIC);
3013                 if (!vbuffer)
3014                         return -ENOMEM;
3015
3016                 memcpy(vbuffer, bus->vars, bus->varsz);
3017
3018                 /* Write the vars list */
3019                 bcmerror =
3020                     brcmf_sdbrcm_membytes(bus, true, varaddr, vbuffer, varsize);
3021 #ifdef BCMDBG
3022                 /* Verify NVRAM bytes */
3023                 brcmf_dbg(INFO, "Compare NVRAM dl & ul; varsize=%d\n", varsize);
3024                 nvram_ularray = kmalloc(varsize, GFP_ATOMIC);
3025                 if (!nvram_ularray)
3026                         return -ENOMEM;
3027
3028                 /* Upload image to verify downloaded contents. */
3029                 memset(nvram_ularray, 0xaa, varsize);
3030
3031                 /* Read the vars list to temp buffer for comparison */
3032                 bcmerror =
3033                     brcmf_sdbrcm_membytes(bus, false, varaddr, nvram_ularray,
3034                                      varsize);
3035                 if (bcmerror) {
3036                         brcmf_dbg(ERROR, "error %d on reading %d nvram bytes at 0x%08x\n",
3037                                   bcmerror, varsize, varaddr);
3038                 }
3039                 /* Compare the org NVRAM with the one read from RAM */
3040                 if (memcmp(vbuffer, nvram_ularray, varsize))
3041                         brcmf_dbg(ERROR, "Downloaded NVRAM image is corrupted\n");
3042                 else
3043                         brcmf_dbg(ERROR, "Download/Upload/Compare of NVRAM ok\n");
3044
3045                 kfree(nvram_ularray);
3046 #endif                          /* BCMDBG */
3047
3048                 kfree(vbuffer);
3049         }
3050
3051         /* adjust to the user specified RAM */
3052         brcmf_dbg(INFO, "Physical memory size: %d\n", bus->ramsize);
3053         brcmf_dbg(INFO, "Vars are at %d, orig varsize is %d\n",
3054                   varaddr, varsize);
3055         varsize = ((bus->ramsize - 4) - varaddr);
3056
3057         /*
3058          * Determine the length token:
3059          * Varsize, converted to words, in lower 16-bits, checksum
3060          * in upper 16-bits.
3061          */
3062         if (bcmerror) {
3063                 varsizew = 0;
3064                 varsizew_le = cpu_to_le32(0);
3065         } else {
3066                 varsizew = varsize / 4;
3067                 varsizew = (~varsizew << 16) | (varsizew & 0x0000FFFF);
3068                 varsizew_le = cpu_to_le32(varsizew);
3069         }
3070
3071         brcmf_dbg(INFO, "New varsize is %d, length token=0x%08x\n",
3072                   varsize, varsizew);
3073
3074         /* Write the length token to the last word */
3075         bcmerror = brcmf_sdbrcm_membytes(bus, true, (bus->ramsize - 4),
3076                                          (u8 *)&varsizew_le, 4);
3077
3078         return bcmerror;
3079 }
3080
3081 static int brcmf_sdbrcm_download_state(struct brcmf_sdio *bus, bool enter)
3082 {
3083         uint retries;
3084         int bcmerror = 0;
3085         struct chip_info *ci = bus->ci;
3086
3087         /* To enter download state, disable ARM and reset SOCRAM.
3088          * To exit download state, simply reset ARM (default is RAM boot).
3089          */
3090         if (enter) {
3091                 bus->alp_only = true;
3092
3093                 ci->coredisable(bus->sdiodev, ci, BCMA_CORE_ARM_CM3);
3094
3095                 ci->resetcore(bus->sdiodev, ci, BCMA_CORE_INTERNAL_MEM);
3096
3097                 /* Clear the top bit of memory */
3098                 if (bus->ramsize) {
3099                         u32 zeros = 0;
3100                         brcmf_sdbrcm_membytes(bus, true, bus->ramsize - 4,
3101                                          (u8 *)&zeros, 4);
3102                 }
3103         } else {
3104                 if (!ci->iscoreup(bus->sdiodev, ci, BCMA_CORE_INTERNAL_MEM)) {
3105                         brcmf_dbg(ERROR, "SOCRAM core is down after reset?\n");
3106                         bcmerror = -EBADE;
3107                         goto fail;
3108                 }
3109
3110                 bcmerror = brcmf_sdbrcm_write_vars(bus);
3111                 if (bcmerror) {
3112                         brcmf_dbg(ERROR, "no vars written to RAM\n");
3113                         bcmerror = 0;
3114                 }
3115
3116                 w_sdreg32(bus, 0xFFFFFFFF,
3117                           offsetof(struct sdpcmd_regs, intstatus), &retries);
3118
3119                 ci->resetcore(bus->sdiodev, ci, BCMA_CORE_ARM_CM3);
3120
3121                 /* Allow HT Clock now that the ARM is running. */
3122                 bus->alp_only = false;
3123
3124                 bus->drvr->bus_if->state = BRCMF_BUS_LOAD;
3125         }
3126 fail:
3127         return bcmerror;
3128 }
3129
3130 static int brcmf_sdbrcm_get_image(char *buf, int len, struct brcmf_sdio *bus)
3131 {
3132         if (bus->firmware->size < bus->fw_ptr + len)
3133                 len = bus->firmware->size - bus->fw_ptr;
3134
3135         memcpy(buf, &bus->firmware->data[bus->fw_ptr], len);
3136         bus->fw_ptr += len;
3137         return len;
3138 }
3139
3140 static int brcmf_sdbrcm_download_code_file(struct brcmf_sdio *bus)
3141 {
3142         int offset = 0;
3143         uint len;
3144         u8 *memblock = NULL, *memptr;
3145         int ret;
3146
3147         brcmf_dbg(INFO, "Enter\n");
3148
3149         ret = request_firmware(&bus->firmware, BRCMFMAC_FW_NAME,
3150                                &bus->sdiodev->func[2]->dev);
3151         if (ret) {
3152                 brcmf_dbg(ERROR, "Fail to request firmware %d\n", ret);
3153                 return ret;
3154         }
3155         bus->fw_ptr = 0;
3156
3157         memptr = memblock = kmalloc(MEMBLOCK + BRCMF_SDALIGN, GFP_ATOMIC);
3158         if (memblock == NULL) {
3159                 ret = -ENOMEM;
3160                 goto err;
3161         }
3162         if ((u32)(unsigned long)memblock % BRCMF_SDALIGN)
3163                 memptr += (BRCMF_SDALIGN -
3164                            ((u32)(unsigned long)memblock % BRCMF_SDALIGN));
3165
3166         /* Download image */
3167         while ((len =
3168                 brcmf_sdbrcm_get_image((char *)memptr, MEMBLOCK, bus))) {
3169                 ret = brcmf_sdbrcm_membytes(bus, true, offset, memptr, len);
3170                 if (ret) {
3171                         brcmf_dbg(ERROR, "error %d on writing %d membytes at 0x%08x\n",
3172                                   ret, MEMBLOCK, offset);
3173                         goto err;
3174                 }
3175
3176                 offset += MEMBLOCK;
3177         }
3178
3179 err:
3180         kfree(memblock);
3181
3182         release_firmware(bus->firmware);
3183         bus->fw_ptr = 0;
3184
3185         return ret;
3186 }
3187
3188 /*
3189  * ProcessVars:Takes a buffer of "<var>=<value>\n" lines read from a file
3190  * and ending in a NUL.
3191  * Removes carriage returns, empty lines, comment lines, and converts
3192  * newlines to NULs.
3193  * Shortens buffer as needed and pads with NULs.  End of buffer is marked
3194  * by two NULs.
3195 */
3196
3197 static uint brcmf_process_nvram_vars(char *varbuf, uint len)
3198 {
3199         char *dp;
3200         bool findNewline;
3201         int column;
3202         uint buf_len, n;
3203
3204         dp = varbuf;
3205
3206         findNewline = false;
3207         column = 0;
3208
3209         for (n = 0; n < len; n++) {
3210                 if (varbuf[n] == 0)
3211                         break;
3212                 if (varbuf[n] == '\r')
3213                         continue;
3214                 if (findNewline && varbuf[n] != '\n')
3215                         continue;
3216                 findNewline = false;
3217                 if (varbuf[n] == '#') {
3218                         findNewline = true;
3219                         continue;
3220                 }
3221                 if (varbuf[n] == '\n') {
3222                         if (column == 0)
3223                                 continue;
3224                         *dp++ = 0;
3225                         column = 0;
3226                         continue;
3227                 }
3228                 *dp++ = varbuf[n];
3229                 column++;
3230         }
3231         buf_len = dp - varbuf;
3232
3233         while (dp < varbuf + n)
3234                 *dp++ = 0;
3235
3236         return buf_len;
3237 }
3238
3239 static int brcmf_sdbrcm_download_nvram(struct brcmf_sdio *bus)
3240 {
3241         uint len;
3242         char *memblock = NULL;
3243         char *bufp;
3244         int ret;
3245
3246         ret = request_firmware(&bus->firmware, BRCMFMAC_NV_NAME,
3247                                &bus->sdiodev->func[2]->dev);
3248         if (ret) {
3249                 brcmf_dbg(ERROR, "Fail to request nvram %d\n", ret);
3250                 return ret;
3251         }
3252         bus->fw_ptr = 0;
3253
3254         memblock = kmalloc(MEMBLOCK, GFP_ATOMIC);
3255         if (memblock == NULL) {
3256                 ret = -ENOMEM;
3257                 goto err;
3258         }
3259
3260         len = brcmf_sdbrcm_get_image(memblock, MEMBLOCK, bus);
3261
3262         if (len > 0 && len < MEMBLOCK) {
3263                 bufp = (char *)memblock;
3264                 bufp[len] = 0;
3265                 len = brcmf_process_nvram_vars(bufp, len);
3266                 bufp += len;
3267                 *bufp++ = 0;
3268                 if (len)
3269                         ret = brcmf_sdbrcm_downloadvars(bus, memblock, len + 1);
3270                 if (ret)
3271                         brcmf_dbg(ERROR, "error downloading vars: %d\n", ret);
3272         } else {
3273                 brcmf_dbg(ERROR, "error reading nvram file: %d\n", len);
3274                 ret = -EIO;
3275         }
3276
3277 err:
3278         kfree(memblock);
3279
3280         release_firmware(bus->firmware);
3281         bus->fw_ptr = 0;
3282
3283         return ret;
3284 }
3285
3286 static int _brcmf_sdbrcm_download_firmware(struct brcmf_sdio *bus)
3287 {
3288         int bcmerror = -1;
3289
3290         /* Keep arm in reset */
3291         if (brcmf_sdbrcm_download_state(bus, true)) {
3292                 brcmf_dbg(ERROR, "error placing ARM core in reset\n");
3293                 goto err;
3294         }
3295
3296         /* External image takes precedence if specified */
3297         if (brcmf_sdbrcm_download_code_file(bus)) {
3298                 brcmf_dbg(ERROR, "dongle image file download failed\n");
3299                 goto err;
3300         }
3301
3302         /* External nvram takes precedence if specified */
3303         if (brcmf_sdbrcm_download_nvram(bus))
3304                 brcmf_dbg(ERROR, "dongle nvram file download failed\n");
3305
3306         /* Take arm out of reset */
3307         if (brcmf_sdbrcm_download_state(bus, false)) {
3308                 brcmf_dbg(ERROR, "error getting out of ARM core reset\n");
3309                 goto err;
3310         }
3311
3312         bcmerror = 0;
3313
3314 err:
3315         return bcmerror;
3316 }
3317
3318 static bool
3319 brcmf_sdbrcm_download_firmware(struct brcmf_sdio *bus)
3320 {
3321         bool ret;
3322
3323         /* Download the firmware */
3324         brcmf_sdbrcm_clkctl(bus, CLK_AVAIL, false);
3325
3326         ret = _brcmf_sdbrcm_download_firmware(bus) == 0;
3327
3328         brcmf_sdbrcm_clkctl(bus, CLK_SDONLY, false);
3329
3330         return ret;
3331 }
3332
3333 void brcmf_sdbrcm_bus_stop(struct device *dev)
3334 {
3335         u32 local_hostintmask;
3336         u8 saveclk;
3337         uint retries;
3338         int err;
3339         struct brcmf_bus *bus_if = dev_get_drvdata(dev);
3340         struct brcmf_sdio_dev *sdiodev = bus_if->bus_priv;
3341         struct brcmf_sdio *bus = sdiodev->bus;
3342
3343         brcmf_dbg(TRACE, "Enter\n");
3344
3345         if (bus->watchdog_tsk) {
3346                 send_sig(SIGTERM, bus->watchdog_tsk, 1);
3347                 kthread_stop(bus->watchdog_tsk);
3348                 bus->watchdog_tsk = NULL;
3349         }
3350
3351         if (bus->dpc_tsk && bus->dpc_tsk != current) {
3352                 send_sig(SIGTERM, bus->dpc_tsk, 1);
3353                 kthread_stop(bus->dpc_tsk);
3354                 bus->dpc_tsk = NULL;
3355         }
3356
3357         down(&bus->sdsem);
3358
3359         bus_wake(bus);
3360
3361         /* Enable clock for device interrupts */
3362         brcmf_sdbrcm_clkctl(bus, CLK_AVAIL, false);
3363
3364         /* Disable and clear interrupts at the chip level also */
3365         w_sdreg32(bus, 0, offsetof(struct sdpcmd_regs, hostintmask), &retries);
3366         local_hostintmask = bus->hostintmask;
3367         bus->hostintmask = 0;
3368
3369         /* Change our idea of bus state */
3370         bus->drvr->bus_if->state = BRCMF_BUS_DOWN;
3371
3372         /* Force clocks on backplane to be sure F2 interrupt propagates */
3373         saveclk = brcmf_sdcard_cfg_read(bus->sdiodev, SDIO_FUNC_1,
3374                                         SBSDIO_FUNC1_CHIPCLKCSR, &err);
3375         if (!err) {
3376                 brcmf_sdcard_cfg_write(bus->sdiodev, SDIO_FUNC_1,
3377                                        SBSDIO_FUNC1_CHIPCLKCSR,
3378                                        (saveclk | SBSDIO_FORCE_HT), &err);
3379         }
3380         if (err)
3381                 brcmf_dbg(ERROR, "Failed to force clock for F2: err %d\n", err);
3382
3383         /* Turn off the bus (F2), free any pending packets */
3384         brcmf_dbg(INTR, "disable SDIO interrupts\n");
3385         brcmf_sdcard_cfg_write(bus->sdiodev, SDIO_FUNC_0, SDIO_CCCR_IOEx,
3386                          SDIO_FUNC_ENABLE_1, NULL);
3387
3388         /* Clear any pending interrupts now that F2 is disabled */
3389         w_sdreg32(bus, local_hostintmask,
3390                   offsetof(struct sdpcmd_regs, intstatus), &retries);
3391
3392         /* Turn off the backplane clock (only) */
3393         brcmf_sdbrcm_clkctl(bus, CLK_SDONLY, false);
3394
3395         /* Clear the data packet queues */
3396         brcmu_pktq_flush(&bus->txq, true, NULL, NULL);
3397
3398         /* Clear any held glomming stuff */
3399         if (bus->glomd)
3400                 brcmu_pkt_buf_free_skb(bus->glomd);
3401         brcmf_sdbrcm_free_glom(bus);
3402
3403         /* Clear rx control and wake any waiters */
3404         bus->rxlen = 0;
3405         brcmf_sdbrcm_dcmd_resp_wake(bus);
3406
3407         /* Reset some F2 state stuff */
3408         bus->rxskip = false;
3409         bus->tx_seq = bus->rx_seq = 0;
3410
3411         up(&bus->sdsem);
3412 }
3413
3414 int brcmf_sdbrcm_bus_init(struct device *dev)
3415 {
3416         struct brcmf_bus *bus_if = dev_get_drvdata(dev);
3417         struct brcmf_sdio_dev *sdiodev = bus_if->bus_priv;
3418         struct brcmf_sdio *bus = sdiodev->bus;
3419         unsigned long timeout;
3420         uint retries = 0;
3421         u8 ready, enable;
3422         int err, ret = 0;
3423         u8 saveclk;
3424
3425         brcmf_dbg(TRACE, "Enter\n");
3426
3427         /* try to download image and nvram to the dongle */
3428         if (bus_if->state == BRCMF_BUS_DOWN) {
3429                 if (!(brcmf_sdbrcm_download_firmware(bus)))
3430                         return -1;
3431         }
3432
3433         if (!bus->drvr)
3434                 return 0;
3435
3436         /* Start the watchdog timer */
3437         bus->drvr->tickcnt = 0;
3438         brcmf_sdbrcm_wd_timer(bus, BRCMF_WD_POLL_MS);
3439
3440         down(&bus->sdsem);
3441
3442         /* Make sure backplane clock is on, needed to generate F2 interrupt */
3443         brcmf_sdbrcm_clkctl(bus, CLK_AVAIL, false);
3444         if (bus->clkstate != CLK_AVAIL)
3445                 goto exit;
3446
3447         /* Force clocks on backplane to be sure F2 interrupt propagates */
3448         saveclk =
3449             brcmf_sdcard_cfg_read(bus->sdiodev, SDIO_FUNC_1,
3450                                   SBSDIO_FUNC1_CHIPCLKCSR, &err);
3451         if (!err) {
3452                 brcmf_sdcard_cfg_write(bus->sdiodev, SDIO_FUNC_1,
3453                                        SBSDIO_FUNC1_CHIPCLKCSR,
3454                                        (saveclk | SBSDIO_FORCE_HT), &err);
3455         }
3456         if (err) {
3457                 brcmf_dbg(ERROR, "Failed to force clock for F2: err %d\n", err);
3458                 goto exit;
3459         }
3460
3461         /* Enable function 2 (frame transfers) */
3462         w_sdreg32(bus, SDPCM_PROT_VERSION << SMB_DATA_VERSION_SHIFT,
3463                   offsetof(struct sdpcmd_regs, tosbmailboxdata), &retries);
3464         enable = (SDIO_FUNC_ENABLE_1 | SDIO_FUNC_ENABLE_2);
3465
3466         brcmf_sdcard_cfg_write(bus->sdiodev, SDIO_FUNC_0, SDIO_CCCR_IOEx,
3467                                enable, NULL);
3468
3469         timeout = jiffies + msecs_to_jiffies(BRCMF_WAIT_F2RDY);
3470         ready = 0;
3471         while (enable != ready) {
3472                 ready = brcmf_sdcard_cfg_read(bus->sdiodev, SDIO_FUNC_0,
3473                                               SDIO_CCCR_IORx, NULL);
3474                 if (time_after(jiffies, timeout))
3475                         break;
3476                 else if (time_after(jiffies, timeout - BRCMF_WAIT_F2RDY + 50))
3477                         /* prevent busy waiting if it takes too long */
3478                         msleep_interruptible(20);
3479         }
3480
3481         brcmf_dbg(INFO, "enable 0x%02x, ready 0x%02x\n", enable, ready);
3482
3483         /* If F2 successfully enabled, set core and enable interrupts */
3484         if (ready == enable) {
3485                 /* Set up the interrupt mask and enable interrupts */
3486                 bus->hostintmask = HOSTINTMASK;
3487                 w_sdreg32(bus, bus->hostintmask,
3488                           offsetof(struct sdpcmd_regs, hostintmask), &retries);
3489
3490                 brcmf_sdcard_cfg_write(bus->sdiodev, SDIO_FUNC_1,
3491                                        SBSDIO_WATERMARK, 8, &err);
3492
3493                 /* Set bus state according to enable result */
3494                 bus_if->state = BRCMF_BUS_DATA;
3495         }
3496
3497         else {
3498                 /* Disable F2 again */
3499                 enable = SDIO_FUNC_ENABLE_1;
3500                 brcmf_sdcard_cfg_write(bus->sdiodev, SDIO_FUNC_0,
3501                                        SDIO_CCCR_IOEx, enable, NULL);
3502         }
3503
3504         /* Restore previous clock setting */
3505         brcmf_sdcard_cfg_write(bus->sdiodev, SDIO_FUNC_1,
3506                                SBSDIO_FUNC1_CHIPCLKCSR, saveclk, &err);
3507
3508         /* If we didn't come up, turn off backplane clock */
3509         if (bus_if->state != BRCMF_BUS_DATA)
3510                 brcmf_sdbrcm_clkctl(bus, CLK_NONE, false);
3511
3512 exit:
3513         up(&bus->sdsem);
3514
3515         return ret;
3516 }
3517
3518 void brcmf_sdbrcm_isr(void *arg)
3519 {
3520         struct brcmf_sdio *bus = (struct brcmf_sdio *) arg;
3521
3522         brcmf_dbg(TRACE, "Enter\n");
3523
3524         if (!bus) {
3525                 brcmf_dbg(ERROR, "bus is null pointer, exiting\n");
3526                 return;
3527         }
3528
3529         if (bus->drvr->bus_if->state == BRCMF_BUS_DOWN) {
3530                 brcmf_dbg(ERROR, "bus is down. we have nothing to do\n");
3531                 return;
3532         }
3533         /* Count the interrupt call */
3534         bus->intrcount++;
3535         bus->ipend = true;
3536
3537         /* Shouldn't get this interrupt if we're sleeping? */
3538         if (bus->sleeping) {
3539                 brcmf_dbg(ERROR, "INTERRUPT WHILE SLEEPING??\n");
3540                 return;
3541         }
3542
3543         /* Disable additional interrupts (is this needed now)? */
3544         if (!bus->intr)
3545                 brcmf_dbg(ERROR, "isr w/o interrupt configured!\n");
3546
3547         bus->dpc_sched = true;
3548         if (bus->dpc_tsk)
3549                 complete(&bus->dpc_wait);
3550 }
3551
3552 static bool brcmf_sdbrcm_bus_watchdog(struct brcmf_sdio *bus)
3553 {
3554 #ifdef BCMDBG
3555         struct brcmf_bus *bus_if = dev_get_drvdata(bus->sdiodev->dev);
3556 #endif  /* BCMDBG */
3557
3558         brcmf_dbg(TIMER, "Enter\n");
3559
3560         /* Ignore the timer if simulating bus down */
3561         if (bus->sleeping)
3562                 return false;
3563
3564         down(&bus->sdsem);
3565
3566         /* Poll period: check device if appropriate. */
3567         if (bus->poll && (++bus->polltick >= bus->pollrate)) {
3568                 u32 intstatus = 0;
3569
3570                 /* Reset poll tick */
3571                 bus->polltick = 0;
3572
3573                 /* Check device if no interrupts */
3574                 if (!bus->intr || (bus->intrcount == bus->lastintrs)) {
3575
3576                         if (!bus->dpc_sched) {
3577                                 u8 devpend;
3578                                 devpend = brcmf_sdcard_cfg_read(bus->sdiodev,
3579                                                 SDIO_FUNC_0, SDIO_CCCR_INTx,
3580                                                 NULL);
3581                                 intstatus =
3582                                     devpend & (INTR_STATUS_FUNC1 |
3583                                                INTR_STATUS_FUNC2);
3584                         }
3585
3586                         /* If there is something, make like the ISR and
3587                                  schedule the DPC */
3588                         if (intstatus) {
3589                                 bus->pollcnt++;
3590                                 bus->ipend = true;
3591
3592                                 bus->dpc_sched = true;
3593                                 if (bus->dpc_tsk)
3594                                         complete(&bus->dpc_wait);
3595                         }
3596                 }
3597
3598                 /* Update interrupt tracking */
3599                 bus->lastintrs = bus->intrcount;
3600         }
3601 #ifdef BCMDBG
3602         /* Poll for console output periodically */
3603         if (bus_if->state == BRCMF_BUS_DATA &&
3604             bus->console_interval != 0) {
3605                 bus->console.count += BRCMF_WD_POLL_MS;
3606                 if (bus->console.count >= bus->console_interval) {
3607                         bus->console.count -= bus->console_interval;
3608                         /* Make sure backplane clock is on */
3609                         brcmf_sdbrcm_clkctl(bus, CLK_AVAIL, false);
3610                         if (brcmf_sdbrcm_readconsole(bus) < 0)
3611                                 /* stop on error */
3612                                 bus->console_interval = 0;
3613                 }
3614         }
3615 #endif                          /* BCMDBG */
3616
3617         /* On idle timeout clear activity flag and/or turn off clock */
3618         if ((bus->idletime > 0) && (bus->clkstate == CLK_AVAIL)) {
3619                 if (++bus->idlecount >= bus->idletime) {
3620                         bus->idlecount = 0;
3621                         if (bus->activity) {
3622                                 bus->activity = false;
3623                                 brcmf_sdbrcm_wd_timer(bus, BRCMF_WD_POLL_MS);
3624                         } else {
3625                                 brcmf_sdbrcm_clkctl(bus, CLK_NONE, false);
3626                         }
3627                 }
3628         }
3629
3630         up(&bus->sdsem);
3631
3632         return bus->ipend;
3633 }
3634
3635 static bool brcmf_sdbrcm_chipmatch(u16 chipid)
3636 {
3637         if (chipid == BCM4329_CHIP_ID)
3638                 return true;
3639         if (chipid == BCM4330_CHIP_ID)
3640                 return true;
3641         return false;
3642 }
3643
3644 static void brcmf_sdbrcm_release_malloc(struct brcmf_sdio *bus)
3645 {
3646         brcmf_dbg(TRACE, "Enter\n");
3647
3648         kfree(bus->rxbuf);
3649         bus->rxctl = bus->rxbuf = NULL;
3650         bus->rxlen = 0;
3651
3652         kfree(bus->databuf);
3653         bus->databuf = NULL;
3654 }
3655
3656 static bool brcmf_sdbrcm_probe_malloc(struct brcmf_sdio *bus)
3657 {
3658         brcmf_dbg(TRACE, "Enter\n");
3659
3660         if (bus->drvr->maxctl) {
3661                 bus->rxblen =
3662                     roundup((bus->drvr->maxctl + SDPCM_HDRLEN),
3663                             ALIGNMENT) + BRCMF_SDALIGN;
3664                 bus->rxbuf = kmalloc(bus->rxblen, GFP_ATOMIC);
3665                 if (!(bus->rxbuf))
3666                         goto fail;
3667         }
3668
3669         /* Allocate buffer to receive glomed packet */
3670         bus->databuf = kmalloc(MAX_DATA_BUF, GFP_ATOMIC);
3671         if (!(bus->databuf)) {
3672                 /* release rxbuf which was already located as above */
3673                 if (!bus->rxblen)
3674                         kfree(bus->rxbuf);
3675                 goto fail;
3676         }
3677
3678         /* Align the buffer */
3679         if ((unsigned long)bus->databuf % BRCMF_SDALIGN)
3680                 bus->dataptr = bus->databuf + (BRCMF_SDALIGN -
3681                                ((unsigned long)bus->databuf % BRCMF_SDALIGN));
3682         else
3683                 bus->dataptr = bus->databuf;
3684
3685         return true;
3686
3687 fail:
3688         return false;
3689 }
3690
3691 static bool
3692 brcmf_sdbrcm_probe_attach(struct brcmf_sdio *bus, u32 regsva)
3693 {
3694         u8 clkctl = 0;
3695         int err = 0;
3696         int reg_addr;
3697         u32 reg_val;
3698         u8 idx;
3699
3700         bus->alp_only = true;
3701
3702         /* Return the window to backplane enumeration space for core access */
3703         if (brcmf_sdcard_set_sbaddr_window(bus->sdiodev, SI_ENUM_BASE))
3704                 brcmf_dbg(ERROR, "FAILED to return to SI_ENUM_BASE\n");
3705
3706 #ifdef BCMDBG
3707         printk(KERN_DEBUG "F1 signature read @0x18000000=0x%4x\n",
3708                brcmf_sdcard_reg_read(bus->sdiodev, SI_ENUM_BASE, 4));
3709
3710 #endif                          /* BCMDBG */
3711
3712         /*
3713          * Force PLL off until brcmf_sdio_chip_attach()
3714          * programs PLL control regs
3715          */
3716
3717         brcmf_sdcard_cfg_write(bus->sdiodev, SDIO_FUNC_1,
3718                                SBSDIO_FUNC1_CHIPCLKCSR,
3719                                BRCMF_INIT_CLKCTL1, &err);
3720         if (!err)
3721                 clkctl =
3722                     brcmf_sdcard_cfg_read(bus->sdiodev, SDIO_FUNC_1,
3723                                           SBSDIO_FUNC1_CHIPCLKCSR, &err);
3724
3725         if (err || ((clkctl & ~SBSDIO_AVBITS) != BRCMF_INIT_CLKCTL1)) {
3726                 brcmf_dbg(ERROR, "ChipClkCSR access: err %d wrote 0x%02x read 0x%02x\n",
3727                           err, BRCMF_INIT_CLKCTL1, clkctl);
3728                 goto fail;
3729         }
3730
3731         if (brcmf_sdio_chip_attach(bus->sdiodev, &bus->ci, regsva)) {
3732                 brcmf_dbg(ERROR, "brcmf_sdio_chip_attach failed!\n");
3733                 goto fail;
3734         }
3735
3736         if (!brcmf_sdbrcm_chipmatch((u16) bus->ci->chip)) {
3737                 brcmf_dbg(ERROR, "unsupported chip: 0x%04x\n", bus->ci->chip);
3738                 goto fail;
3739         }
3740
3741         brcmf_sdio_chip_drivestrengthinit(bus->sdiodev, bus->ci,
3742                                           SDIO_DRIVE_STRENGTH);
3743
3744         /* Get info on the SOCRAM cores... */
3745         bus->ramsize = bus->ci->ramsize;
3746         if (!(bus->ramsize)) {
3747                 brcmf_dbg(ERROR, "failed to find SOCRAM memory!\n");
3748                 goto fail;
3749         }
3750
3751         /* Set core control so an SDIO reset does a backplane reset */
3752         idx = brcmf_sdio_chip_getinfidx(bus->ci, BCMA_CORE_SDIO_DEV);
3753         reg_addr = bus->ci->c_inf[idx].base +
3754                    offsetof(struct sdpcmd_regs, corecontrol);
3755         reg_val = brcmf_sdcard_reg_read(bus->sdiodev, reg_addr, sizeof(u32));
3756         brcmf_sdcard_reg_write(bus->sdiodev, reg_addr, sizeof(u32),
3757                                reg_val | CC_BPRESEN);
3758
3759         brcmu_pktq_init(&bus->txq, (PRIOMASK + 1), TXQLEN);
3760
3761         /* Locate an appropriately-aligned portion of hdrbuf */
3762         bus->rxhdr = (u8 *) roundup((unsigned long)&bus->hdrbuf[0],
3763                                     BRCMF_SDALIGN);
3764
3765         /* Set the poll and/or interrupt flags */
3766         bus->intr = true;
3767         bus->poll = false;
3768         if (bus->poll)
3769                 bus->pollrate = 1;
3770
3771         return true;
3772
3773 fail:
3774         return false;
3775 }
3776
3777 static bool brcmf_sdbrcm_probe_init(struct brcmf_sdio *bus)
3778 {
3779         brcmf_dbg(TRACE, "Enter\n");
3780
3781         /* Disable F2 to clear any intermediate frame state on the dongle */
3782         brcmf_sdcard_cfg_write(bus->sdiodev, SDIO_FUNC_0, SDIO_CCCR_IOEx,
3783                                SDIO_FUNC_ENABLE_1, NULL);
3784
3785         bus->drvr->bus_if->state = BRCMF_BUS_DOWN;
3786         bus->sleeping = false;
3787         bus->rxflow = false;
3788
3789         /* Done with backplane-dependent accesses, can drop clock... */
3790         brcmf_sdcard_cfg_write(bus->sdiodev, SDIO_FUNC_1,
3791                                SBSDIO_FUNC1_CHIPCLKCSR, 0, NULL);
3792
3793         /* ...and initialize clock/power states */
3794         bus->clkstate = CLK_SDONLY;
3795         bus->idletime = BRCMF_IDLE_INTERVAL;
3796         bus->idleclock = BRCMF_IDLE_ACTIVE;
3797
3798         /* Query the F2 block size, set roundup accordingly */
3799         bus->blocksize = bus->sdiodev->func[2]->cur_blksize;
3800         bus->roundup = min(max_roundup, bus->blocksize);
3801
3802         /* bus module does not support packet chaining */
3803         bus->use_rxchain = false;
3804         bus->sd_rxchain = false;
3805
3806         return true;
3807 }
3808
3809 static int
3810 brcmf_sdbrcm_watchdog_thread(void *data)
3811 {
3812         struct brcmf_sdio *bus = (struct brcmf_sdio *)data;
3813
3814         allow_signal(SIGTERM);
3815         /* Run until signal received */
3816         while (1) {
3817                 if (kthread_should_stop())
3818                         break;
3819                 if (!wait_for_completion_interruptible(&bus->watchdog_wait)) {
3820                         brcmf_sdbrcm_bus_watchdog(bus);
3821                         /* Count the tick for reference */
3822                         bus->drvr->tickcnt++;
3823                 } else
3824                         break;
3825         }
3826         return 0;
3827 }
3828
3829 static void
3830 brcmf_sdbrcm_watchdog(unsigned long data)
3831 {
3832         struct brcmf_sdio *bus = (struct brcmf_sdio *)data;
3833
3834         if (bus->watchdog_tsk) {
3835                 complete(&bus->watchdog_wait);
3836                 /* Reschedule the watchdog */
3837                 if (bus->wd_timer_valid)
3838                         mod_timer(&bus->timer,
3839                                   jiffies + BRCMF_WD_POLL_MS * HZ / 1000);
3840         }
3841 }
3842
3843 static void brcmf_sdbrcm_release_dongle(struct brcmf_sdio *bus)
3844 {
3845         brcmf_dbg(TRACE, "Enter\n");
3846
3847         if (bus->ci) {
3848                 brcmf_sdbrcm_clkctl(bus, CLK_AVAIL, false);
3849                 brcmf_sdbrcm_clkctl(bus, CLK_NONE, false);
3850                 brcmf_sdio_chip_detach(&bus->ci);
3851                 if (bus->vars && bus->varsz)
3852                         kfree(bus->vars);
3853                 bus->vars = NULL;
3854         }
3855
3856         brcmf_dbg(TRACE, "Disconnected\n");
3857 }
3858
3859 /* Detach and free everything */
3860 static void brcmf_sdbrcm_release(struct brcmf_sdio *bus)
3861 {
3862         brcmf_dbg(TRACE, "Enter\n");
3863
3864         if (bus) {
3865                 /* De-register interrupt handler */
3866                 brcmf_sdcard_intr_dereg(bus->sdiodev);
3867
3868                 if (bus->sdiodev->bus_if->drvr) {
3869                         brcmf_detach(bus->sdiodev->dev);
3870                         brcmf_sdbrcm_release_dongle(bus);
3871                         bus->drvr = NULL;
3872                 }
3873
3874                 brcmf_sdbrcm_release_malloc(bus);
3875
3876                 kfree(bus);
3877         }
3878
3879         brcmf_dbg(TRACE, "Disconnected\n");
3880 }
3881
3882 void *brcmf_sdbrcm_probe(u32 regsva, struct brcmf_sdio_dev *sdiodev)
3883 {
3884         int ret;
3885         struct brcmf_sdio *bus;
3886
3887         brcmf_dbg(TRACE, "Enter\n");
3888
3889         /* We make an assumption about address window mappings:
3890          * regsva == SI_ENUM_BASE*/
3891
3892         /* Allocate private bus interface state */
3893         bus = kzalloc(sizeof(struct brcmf_sdio), GFP_ATOMIC);
3894         if (!bus)
3895                 goto fail;
3896
3897         bus->sdiodev = sdiodev;
3898         sdiodev->bus = bus;
3899         skb_queue_head_init(&bus->glom);
3900         bus->txbound = BRCMF_TXBOUND;
3901         bus->rxbound = BRCMF_RXBOUND;
3902         bus->txminmax = BRCMF_TXMINMAX;
3903         bus->tx_seq = SDPCM_SEQUENCE_WRAP - 1;
3904         bus->usebufpool = false;        /* Use bufpool if allocated,
3905                                          else use locally malloced rxbuf */
3906
3907         /* attempt to attach to the dongle */
3908         if (!(brcmf_sdbrcm_probe_attach(bus, regsva))) {
3909                 brcmf_dbg(ERROR, "brcmf_sdbrcm_probe_attach failed\n");
3910                 goto fail;
3911         }
3912
3913         spin_lock_init(&bus->txqlock);
3914         init_waitqueue_head(&bus->ctrl_wait);
3915         init_waitqueue_head(&bus->dcmd_resp_wait);
3916
3917         /* Set up the watchdog timer */
3918         init_timer(&bus->timer);
3919         bus->timer.data = (unsigned long)bus;
3920         bus->timer.function = brcmf_sdbrcm_watchdog;
3921
3922         /* Initialize thread based operation and lock */
3923         sema_init(&bus->sdsem, 1);
3924
3925         /* Initialize watchdog thread */
3926         init_completion(&bus->watchdog_wait);
3927         bus->watchdog_tsk = kthread_run(brcmf_sdbrcm_watchdog_thread,
3928                                         bus, "brcmf_watchdog");
3929         if (IS_ERR(bus->watchdog_tsk)) {
3930                 printk(KERN_WARNING
3931                        "brcmf_watchdog thread failed to start\n");
3932                 bus->watchdog_tsk = NULL;
3933         }
3934         /* Initialize DPC thread */
3935         init_completion(&bus->dpc_wait);
3936         bus->dpc_tsk = kthread_run(brcmf_sdbrcm_dpc_thread,
3937                                    bus, "brcmf_dpc");
3938         if (IS_ERR(bus->dpc_tsk)) {
3939                 printk(KERN_WARNING
3940                        "brcmf_dpc thread failed to start\n");
3941                 bus->dpc_tsk = NULL;
3942         }
3943
3944         /* Attach to the brcmf/OS/network interface */
3945         bus->drvr = brcmf_attach(bus, SDPCM_RESERVE, bus->sdiodev->dev);
3946         if (!bus->drvr) {
3947                 brcmf_dbg(ERROR, "brcmf_attach failed\n");
3948                 goto fail;
3949         }
3950
3951         /* Allocate buffers */
3952         if (!(brcmf_sdbrcm_probe_malloc(bus))) {
3953                 brcmf_dbg(ERROR, "brcmf_sdbrcm_probe_malloc failed\n");
3954                 goto fail;
3955         }
3956
3957         if (!(brcmf_sdbrcm_probe_init(bus))) {
3958                 brcmf_dbg(ERROR, "brcmf_sdbrcm_probe_init failed\n");
3959                 goto fail;
3960         }
3961
3962         /* Register interrupt callback, but mask it (not operational yet). */
3963         brcmf_dbg(INTR, "disable SDIO interrupts (not interested yet)\n");
3964         ret = brcmf_sdcard_intr_reg(bus->sdiodev);
3965         if (ret != 0) {
3966                 brcmf_dbg(ERROR, "FAILED: sdcard_intr_reg returned %d\n", ret);
3967                 goto fail;
3968         }
3969         brcmf_dbg(INTR, "registered SDIO interrupt function ok\n");
3970
3971         brcmf_dbg(INFO, "completed!!\n");
3972
3973         /* if firmware path present try to download and bring up bus */
3974         ret = brcmf_bus_start(bus->sdiodev->dev);
3975         if (ret != 0) {
3976                 if (ret == -ENOLINK) {
3977                         brcmf_dbg(ERROR, "dongle is not responding\n");
3978                         goto fail;
3979                 }
3980         }
3981
3982         /* add interface and open for business */
3983         if (brcmf_add_if(bus->sdiodev->dev, 0, "wlan%d", NULL)) {
3984                 brcmf_dbg(ERROR, "Add primary net device interface failed!!\n");
3985                 goto fail;
3986         }
3987
3988         return bus;
3989
3990 fail:
3991         brcmf_sdbrcm_release(bus);
3992         return NULL;
3993 }
3994
3995 void brcmf_sdbrcm_disconnect(void *ptr)
3996 {
3997         struct brcmf_sdio *bus = (struct brcmf_sdio *)ptr;
3998
3999         brcmf_dbg(TRACE, "Enter\n");
4000
4001         if (bus)
4002                 brcmf_sdbrcm_release(bus);
4003
4004         brcmf_dbg(TRACE, "Disconnected\n");
4005 }
4006
4007 void
4008 brcmf_sdbrcm_wd_timer(struct brcmf_sdio *bus, uint wdtick)
4009 {
4010         /* Totally stop the timer */
4011         if (!wdtick && bus->wd_timer_valid == true) {
4012                 del_timer_sync(&bus->timer);
4013                 bus->wd_timer_valid = false;
4014                 bus->save_ms = wdtick;
4015                 return;
4016         }
4017
4018         /* don't start the wd until fw is loaded */
4019         if (bus->drvr->bus_if->state == BRCMF_BUS_DOWN)
4020                 return;
4021
4022         if (wdtick) {
4023                 if (bus->save_ms != BRCMF_WD_POLL_MS) {
4024                         if (bus->wd_timer_valid == true)
4025                                 /* Stop timer and restart at new value */
4026                                 del_timer_sync(&bus->timer);
4027
4028                         /* Create timer again when watchdog period is
4029                            dynamically changed or in the first instance
4030                          */
4031                         bus->timer.expires =
4032                                 jiffies + BRCMF_WD_POLL_MS * HZ / 1000;
4033                         add_timer(&bus->timer);
4034
4035                 } else {
4036                         /* Re arm the timer, at last watchdog period */
4037                         mod_timer(&bus->timer,
4038                                 jiffies + BRCMF_WD_POLL_MS * HZ / 1000);
4039                 }
4040
4041                 bus->wd_timer_valid = true;
4042                 bus->save_ms = wdtick;
4043         }
4044 }