drivers/net/sb1250-mac.c

   1 /*
   2  * Copyright (C) 2001,2002,2003,2004 Broadcom Corporation
   3  *
   4  * This program is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU General Public License
   6  * as published by the Free Software Foundation; either version 2
   7  * of the License, or (at your option) any later version.
   8  *
   9  * This program is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License
  15  * along with this program; if not, write to the Free Software
  16  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  17  *
  18  *
  19  * This driver is designed for the Broadcom SiByte SOC built-in
  20  * Ethernet controllers. Written by Mitch Lichtenberg at Broadcom Corp.
  21  */
  22 #include <linux/module.h>
  23 #include <linux/kernel.h>
  24 #include <linux/string.h>
  25 #include <linux/timer.h>
  26 #include <linux/errno.h>
  27 #include <linux/ioport.h>
  28 #include <linux/slab.h>
  29 #include <linux/interrupt.h>
  30 #include <linux/netdevice.h>
  31 #include <linux/etherdevice.h>
  32 #include <linux/skbuff.h>
  33 #include <linux/init.h>
  34 #include <linux/bitops.h>
  35 #include <asm/processor.h>              /* Processor type for cache alignment. */
  36 #include <asm/io.h>
  37 #include <asm/cache.h>
  38
  39 /* This is only here until the firmware is ready.  In that case,
  40    the firmware leaves the ethernet address in the register for us. */
  41 #ifdef CONFIG_SIBYTE_STANDALONE
  42 #define SBMAC_ETH0_HWADDR "40:00:00:00:01:00"
  43 #define SBMAC_ETH1_HWADDR "40:00:00:00:01:01"
  44 #define SBMAC_ETH2_HWADDR "40:00:00:00:01:02"
  45 #define SBMAC_ETH3_HWADDR "40:00:00:00:01:03"
  46 #endif
  47
  48
  49 /* These identify the driver base version and may not be removed. */
  50 #if 0
  51 static char version1[] __devinitdata =
  52 "sb1250-mac.c:1.00 1/11/2001 Written by Mitch Lichtenberg\n";
  53 #endif
  54
  55
  56 /* Operational parameters that usually are not changed. */
  57
  58 #define CONFIG_SBMAC_COALESCE
  59
  60 #define MAX_UNITS 4             /* More are supported, limit only on options */
  61
  62 /* Time in jiffies before concluding the transmitter is hung. */
  63 #define TX_TIMEOUT  (2*HZ)
  64
  65
  66 MODULE_AUTHOR("Mitch Lichtenberg (Broadcom Corp.)");
  67 MODULE_DESCRIPTION("Broadcom SiByte SOC GB Ethernet driver");
  68
  69 /* A few user-configurable values which may be modified when a driver
  70    module is loaded. */
  71
  72 /* 1 normal messages, 0 quiet .. 7 verbose. */
  73 static int debug = 1;
  74 module_param(debug, int, S_IRUGO);
  75 MODULE_PARM_DESC(debug, "Debug messages");
  76
  77 /* mii status msgs */
  78 static int noisy_mii = 1;
  79 module_param(noisy_mii, int, S_IRUGO);
  80 MODULE_PARM_DESC(noisy_mii, "MII status messages");
  81
  82 /* Used to pass the media type, etc.
  83    Both 'options[]' and 'full_duplex[]' should exist for driver
  84    interoperability.
  85    The media type is usually passed in 'options[]'.
  86 */
  87 #ifdef MODULE
  88 static int options[MAX_UNITS] = {-1, -1, -1, -1};
  89 module_param_array(options, int, NULL, S_IRUGO);
  90 MODULE_PARM_DESC(options, "1-" __MODULE_STRING(MAX_UNITS));
  91
  92 static int full_duplex[MAX_UNITS] = {-1, -1, -1, -1};
  93 module_param_array(full_duplex, int, NULL, S_IRUGO);
  94 MODULE_PARM_DESC(full_duplex, "1-" __MODULE_STRING(MAX_UNITS));
  95 #endif
  96
  97 #ifdef CONFIG_SBMAC_COALESCE
  98 static int int_pktcnt_tx = 255;
  99 module_param(int_pktcnt_tx, int, S_IRUGO);
 100 MODULE_PARM_DESC(int_pktcnt_tx, "TX packet count");
 101
 102 static int int_timeout_tx = 255;
 103 module_param(int_timeout_tx, int, S_IRUGO);
 104 MODULE_PARM_DESC(int_timeout_tx, "TX timeout value");
 105
 106 static int int_pktcnt_rx = 64;
 107 module_param(int_pktcnt_rx, int, S_IRUGO);
 108 MODULE_PARM_DESC(int_pktcnt_rx, "RX packet count");
 109
 110 static int int_timeout_rx = 64;
 111 module_param(int_timeout_rx, int, S_IRUGO);
 112 MODULE_PARM_DESC(int_timeout_rx, "RX timeout value");
 113 #endif
 114
 115 #include <asm/sibyte/sb1250.h>
 116 #if defined(CONFIG_SIBYTE_BCM1x55) || defined(CONFIG_SIBYTE_BCM1x80)
 117 #include <asm/sibyte/bcm1480_regs.h>
 118 #include <asm/sibyte/bcm1480_int.h>
 119 #define R_MAC_DMA_OODPKTLOST_RX R_MAC_DMA_OODPKTLOST
 120 #elif defined(CONFIG_SIBYTE_SB1250) || defined(CONFIG_SIBYTE_BCM112X)
 121 #include <asm/sibyte/sb1250_regs.h>
 122 #include <asm/sibyte/sb1250_int.h>
 123 #else
 124 #error invalid SiByte MAC configuation
 125 #endif
 126 #include <asm/sibyte/sb1250_scd.h>
 127 #include <asm/sibyte/sb1250_mac.h>
 128 #include <asm/sibyte/sb1250_dma.h>
 129
 130 #if defined(CONFIG_SIBYTE_BCM1x55) || defined(CONFIG_SIBYTE_BCM1x80)
 131 #define UNIT_INT(n)             (K_BCM1480_INT_MAC_0 + ((n) * 2))
 132 #elif defined(CONFIG_SIBYTE_SB1250) || defined(CONFIG_SIBYTE_BCM112X)
 133 #define UNIT_INT(n)             (K_INT_MAC_0 + (n))
 134 #else
 135 #error invalid SiByte MAC configuation
 136 #endif
 137
 138 /**********************************************************************
 139  *  Simple types
 140  ********************************************************************* */
 141
 142
 143 typedef enum { sbmac_speed_auto, sbmac_speed_10,
 144                sbmac_speed_100, sbmac_speed_1000 } sbmac_speed_t;
 145
 146 typedef enum { sbmac_duplex_auto, sbmac_duplex_half,
 147                sbmac_duplex_full } sbmac_duplex_t;
 148
 149 typedef enum { sbmac_fc_auto, sbmac_fc_disabled, sbmac_fc_frame,
 150                sbmac_fc_collision, sbmac_fc_carrier } sbmac_fc_t;
 151
 152 typedef enum { sbmac_state_uninit, sbmac_state_off, sbmac_state_on,
 153                sbmac_state_broken } sbmac_state_t;
 154
 155
 156 /**********************************************************************
 157  *  Macros
 158  ********************************************************************* */
 159
 160
 161 #define SBDMA_NEXTBUF(d,f) ((((d)->f+1) == (d)->sbdma_dscrtable_end) ? \
 162                           (d)->sbdma_dscrtable : (d)->f+1)
 163
 164
 165 #define NUMCACHEBLKS(x) (((x)+SMP_CACHE_BYTES-1)/SMP_CACHE_BYTES)
 166
 167 #define SBMAC_MAX_TXDESCR       256
 168 #define SBMAC_MAX_RXDESCR       256
 169
 170 #define ETHER_ALIGN     2
 171 #define ETHER_ADDR_LEN  6
 172 #define ENET_PACKET_SIZE        1518
 173 /*#define ENET_PACKET_SIZE      9216 */
 174
 175 /**********************************************************************
 176  *  DMA Descriptor structure
 177  ********************************************************************* */
 178
 179 typedef struct sbdmadscr_s {
 180         uint64_t  dscr_a;
 181         uint64_t  dscr_b;
 182 } sbdmadscr_t;
 183
 184 typedef unsigned long paddr_t;
 185
 186 /**********************************************************************
 187  *  DMA Controller structure
 188  ********************************************************************* */
 189
 190 typedef struct sbmacdma_s {
 191
 192         /*
 193          * This stuff is used to identify the channel and the registers
 194          * associated with it.
 195          */
 196
 197         struct sbmac_softc *sbdma_eth;      /* back pointer to associated MAC */
 198         int              sbdma_channel;     /* channel number */
 199         int              sbdma_txdir;       /* direction (1=transmit) */
 200         int              sbdma_maxdescr;    /* total # of descriptors in ring */
 201 #ifdef CONFIG_SBMAC_COALESCE
 202         int              sbdma_int_pktcnt;  /* # descriptors rx/tx before interrupt*/
 203         int              sbdma_int_timeout; /* # usec rx/tx interrupt */
 204 #endif
 205
 206         volatile void __iomem *sbdma_config0;   /* DMA config register 0 */
 207         volatile void __iomem *sbdma_config1;   /* DMA config register 1 */
 208         volatile void __iomem *sbdma_dscrbase;  /* Descriptor base address */
 209         volatile void __iomem *sbdma_dscrcnt;   /* Descriptor count register */
 210         volatile void __iomem *sbdma_curdscr;   /* current descriptor address */
 211         volatile void __iomem *sbdma_oodpktlost;/* pkt drop (rx only) */
 212
 213
 214         /*
 215          * This stuff is for maintenance of the ring
 216          */
 217
 218         sbdmadscr_t     *sbdma_dscrtable_unaligned;
 219         sbdmadscr_t     *sbdma_dscrtable;       /* base of descriptor table */
 220         sbdmadscr_t     *sbdma_dscrtable_end; /* end of descriptor table */
 221
 222         struct sk_buff **sbdma_ctxtable;    /* context table, one per descr */
 223
 224         paddr_t          sbdma_dscrtable_phys; /* and also the phys addr */
 225         sbdmadscr_t     *sbdma_addptr;  /* next dscr for sw to add */
 226         sbdmadscr_t     *sbdma_remptr;  /* next dscr for sw to remove */
 227 } sbmacdma_t;
 228
 229
 230 /**********************************************************************
 231  *  Ethernet softc structure
 232  ********************************************************************* */
 233
 234 struct sbmac_softc {
 235
 236         /*
 237          * Linux-specific things
 238          */
 239
 240         struct net_device *sbm_dev;             /* pointer to linux device */
 241         struct napi_struct napi;
 242         spinlock_t sbm_lock;            /* spin lock */
 243         struct timer_list sbm_timer;            /* for monitoring MII */
 244         struct net_device_stats sbm_stats;
 245         int sbm_devflags;                       /* current device flags */
 246
 247         int          sbm_phy_oldbmsr;
 248         int          sbm_phy_oldanlpar;
 249         int          sbm_phy_oldk1stsr;
 250         int          sbm_phy_oldlinkstat;
 251         int sbm_buffersize;
 252
 253         unsigned char sbm_phys[2];
 254
 255         /*
 256          * Controller-specific things
 257          */
 258
 259         void __iomem            *sbm_base;          /* MAC's base address */
 260         sbmac_state_t    sbm_state;         /* current state */
 261
 262         volatile void __iomem   *sbm_macenable; /* MAC Enable Register */
 263         volatile void __iomem   *sbm_maccfg;    /* MAC Configuration Register */
 264         volatile void __iomem   *sbm_fifocfg;   /* FIFO configuration register */
 265         volatile void __iomem   *sbm_framecfg;  /* Frame configuration register */
 266         volatile void __iomem   *sbm_rxfilter;  /* receive filter register */
 267         volatile void __iomem   *sbm_isr;       /* Interrupt status register */
 268         volatile void __iomem   *sbm_imr;       /* Interrupt mask register */
 269         volatile void __iomem   *sbm_mdio;      /* MDIO register */
 270
 271         sbmac_speed_t    sbm_speed;             /* current speed */
 272         sbmac_duplex_t   sbm_duplex;    /* current duplex */
 273         sbmac_fc_t       sbm_fc;                /* current flow control setting */
 274
 275         unsigned char    sbm_hwaddr[ETHER_ADDR_LEN];
 276
 277         sbmacdma_t       sbm_txdma;             /* for now, only use channel 0 */
 278         sbmacdma_t       sbm_rxdma;
 279         int              rx_hw_checksum;
 280         int              sbe_idx;
 281 };
 282
 283
 284 /**********************************************************************
 285  *  Externs
 286  ********************************************************************* */
 287
 288 /**********************************************************************
 289  *  Prototypes
 290  ********************************************************************* */
 291
 292 static void sbdma_initctx(sbmacdma_t *d,
 293                           struct sbmac_softc *s,
 294                           int chan,
 295                           int txrx,
 296                           int maxdescr);
 297 static void sbdma_channel_start(sbmacdma_t *d, int rxtx);
 298 static int sbdma_add_rcvbuffer(sbmacdma_t *d,struct sk_buff *m);
 299 static int sbdma_add_txbuffer(sbmacdma_t *d,struct sk_buff *m);
 300 static void sbdma_emptyring(sbmacdma_t *d);
 301 static void sbdma_fillring(sbmacdma_t *d);
 302 static int sbdma_rx_process(struct sbmac_softc *sc,sbmacdma_t *d, int work_to_do, int poll);
 303 static void sbdma_tx_process(struct sbmac_softc *sc,sbmacdma_t *d, int poll);
 304 static int sbmac_initctx(struct sbmac_softc *s);
 305 static void sbmac_channel_start(struct sbmac_softc *s);
 306 static void sbmac_channel_stop(struct sbmac_softc *s);
 307 static sbmac_state_t sbmac_set_channel_state(struct sbmac_softc *,sbmac_state_t);
 308 static void sbmac_promiscuous_mode(struct sbmac_softc *sc,int onoff);
 309 static uint64_t sbmac_addr2reg(unsigned char *ptr);
 310 static irqreturn_t sbmac_intr(int irq,void *dev_instance);
 311 static int sbmac_start_tx(struct sk_buff *skb, struct net_device *dev);
 312 static void sbmac_setmulti(struct sbmac_softc *sc);
 313 static int sbmac_init(struct net_device *dev, int idx);
 314 static int sbmac_set_speed(struct sbmac_softc *s,sbmac_speed_t speed);
 315 static int sbmac_set_duplex(struct sbmac_softc *s,sbmac_duplex_t duplex,sbmac_fc_t fc);
 316
 317 static int sbmac_open(struct net_device *dev);
 318 static void sbmac_timer(unsigned long data);
 319 static void sbmac_tx_timeout (struct net_device *dev);
 320 static struct net_device_stats *sbmac_get_stats(struct net_device *dev);
 321 static void sbmac_set_rx_mode(struct net_device *dev);
 322 static int sbmac_mii_ioctl(struct net_device *dev, struct ifreq *rq, int cmd);
 323 static int sbmac_close(struct net_device *dev);
 324 static int sbmac_poll(struct napi_struct *napi, int budget);
 325
 326 static int sbmac_mii_poll(struct sbmac_softc *s,int noisy);
 327 static int sbmac_mii_probe(struct net_device *dev);
 328
 329 static void sbmac_mii_sync(struct sbmac_softc *s);
 330 static void sbmac_mii_senddata(struct sbmac_softc *s,unsigned int data, int bitcnt);
 331 static unsigned int sbmac_mii_read(struct sbmac_softc *s,int phyaddr,int regidx);
 332 static void sbmac_mii_write(struct sbmac_softc *s,int phyaddr,int regidx,
 333                             unsigned int regval);
 334
 335
 336 /**********************************************************************
 337  *  Globals
 338  ********************************************************************* */
 339
 340 static uint64_t sbmac_orig_hwaddr[MAX_UNITS];
 341
 342
 343 /**********************************************************************
 344  *  MDIO constants
 345  ********************************************************************* */
 346
 347 #define MII_COMMAND_START       0x01
 348 #define MII_COMMAND_READ        0x02
 349 #define MII_COMMAND_WRITE       0x01
 350 #define MII_COMMAND_ACK         0x02
 351
 352 #define BMCR_RESET     0x8000
 353 #define BMCR_LOOPBACK  0x4000
 354 #define BMCR_SPEED0    0x2000
 355 #define BMCR_ANENABLE  0x1000
 356 #define BMCR_POWERDOWN 0x0800
 357 #define BMCR_ISOLATE   0x0400
 358 #define BMCR_RESTARTAN 0x0200
 359 #define BMCR_DUPLEX    0x0100
 360 #define BMCR_COLTEST   0x0080
 361 #define BMCR_SPEED1    0x0040
 362 #define BMCR_SPEED1000  BMCR_SPEED1
 363 #define BMCR_SPEED100   BMCR_SPEED0
 364 #define BMCR_SPEED10    0
 365
 366 #define BMSR_100BT4     0x8000
 367 #define BMSR_100BT_FDX  0x4000
 368 #define BMSR_100BT_HDX  0x2000
 369 #define BMSR_10BT_FDX   0x1000
 370 #define BMSR_10BT_HDX   0x0800
 371 #define BMSR_100BT2_FDX 0x0400
 372 #define BMSR_100BT2_HDX 0x0200
 373 #define BMSR_1000BT_XSR 0x0100
 374 #define BMSR_PRESUP     0x0040
 375 #define BMSR_ANCOMPLT   0x0020
 376 #define BMSR_REMFAULT   0x0010
 377 #define BMSR_AUTONEG    0x0008
 378 #define BMSR_LINKSTAT   0x0004
 379 #define BMSR_JABDETECT  0x0002
 380 #define BMSR_EXTCAPAB   0x0001
 381
 382 #define PHYIDR1         0x2000
 383 #define PHYIDR2         0x5C60
 384
 385 #define ANAR_NP         0x8000
 386 #define ANAR_RF         0x2000
 387 #define ANAR_ASYPAUSE   0x0800
 388 #define ANAR_PAUSE      0x0400
 389 #define ANAR_T4         0x0200
 390 #define ANAR_TXFD       0x0100
 391 #define ANAR_TXHD       0x0080
 392 #define ANAR_10FD       0x0040
 393 #define ANAR_10HD       0x0020
 394 #define ANAR_PSB        0x0001
 395
 396 #define ANLPAR_NP       0x8000
 397 #define ANLPAR_ACK      0x4000
 398 #define ANLPAR_RF       0x2000
 399 #define ANLPAR_ASYPAUSE 0x0800
 400 #define ANLPAR_PAUSE    0x0400
 401 #define ANLPAR_T4       0x0200
 402 #define ANLPAR_TXFD     0x0100
 403 #define ANLPAR_TXHD     0x0080
 404 #define ANLPAR_10FD     0x0040
 405 #define ANLPAR_10HD     0x0020
 406 #define ANLPAR_PSB      0x0001  /* 802.3 */
 407
 408 #define ANER_PDF        0x0010
 409 #define ANER_LPNPABLE   0x0008
 410 #define ANER_NPABLE     0x0004
 411 #define ANER_PAGERX     0x0002
 412 #define ANER_LPANABLE   0x0001
 413
 414 #define ANNPTR_NP       0x8000
 415 #define ANNPTR_MP       0x2000
 416 #define ANNPTR_ACK2     0x1000
 417 #define ANNPTR_TOGTX    0x0800
 418 #define ANNPTR_CODE     0x0008
 419
 420 #define ANNPRR_NP       0x8000
 421 #define ANNPRR_MP       0x2000
 422 #define ANNPRR_ACK3     0x1000
 423 #define ANNPRR_TOGTX    0x0800
 424 #define ANNPRR_CODE     0x0008
 425
 426 #define K1TCR_TESTMODE  0x0000
 427 #define K1TCR_MSMCE     0x1000
 428 #define K1TCR_MSCV      0x0800
 429 #define K1TCR_RPTR      0x0400
 430 #define K1TCR_1000BT_FDX 0x200
 431 #define K1TCR_1000BT_HDX 0x100
 432
 433 #define K1STSR_MSMCFLT  0x8000
 434 #define K1STSR_MSCFGRES 0x4000
 435 #define K1STSR_LRSTAT   0x2000
 436 #define K1STSR_RRSTAT   0x1000
 437 #define K1STSR_LP1KFD   0x0800
 438 #define K1STSR_LP1KHD   0x0400
 439 #define K1STSR_LPASMDIR 0x0200
 440
 441 #define K1SCR_1KX_FDX   0x8000
 442 #define K1SCR_1KX_HDX   0x4000
 443 #define K1SCR_1KT_FDX   0x2000
 444 #define K1SCR_1KT_HDX   0x1000
 445
 446 #define STRAP_PHY1      0x0800
 447 #define STRAP_NCMODE    0x0400
 448 #define STRAP_MANMSCFG  0x0200
 449 #define STRAP_ANENABLE  0x0100
 450 #define STRAP_MSVAL     0x0080
 451 #define STRAP_1KHDXADV  0x0010
 452 #define STRAP_1KFDXADV  0x0008
 453 #define STRAP_100ADV    0x0004
 454 #define STRAP_SPEEDSEL  0x0000
 455 #define STRAP_SPEED100  0x0001
 456
 457 #define PHYSUP_SPEED1000 0x10
 458 #define PHYSUP_SPEED100  0x08
 459 #define PHYSUP_SPEED10   0x00
 460 #define PHYSUP_LINKUP    0x04
 461 #define PHYSUP_FDX       0x02
 462
 463 #define MII_BMCR        0x00    /* Basic mode control register (rw) */
 464 #define MII_BMSR        0x01    /* Basic mode status register (ro) */
 465 #define MII_PHYIDR1     0x02
 466 #define MII_PHYIDR2     0x03
 467
 468 #define MII_K1STSR      0x0A    /* 1K Status Register (ro) */
 469 #define MII_ANLPAR      0x05    /* Autonegotiation lnk partner abilities (rw) */
 470
 471
 472 #define M_MAC_MDIO_DIR_OUTPUT   0               /* for clarity */
 473
 474 #define ENABLE          1
 475 #define DISABLE         0
 476
 477 /**********************************************************************
 478  *  SBMAC_MII_SYNC(s)
 479  *
 480  *  Synchronize with the MII - send a pattern of bits to the MII
 481  *  that will guarantee that it is ready to accept a command.
 482  *
 483  *  Input parameters:
 484  *         s - sbmac structure
 485  *
 486  *  Return value:
 487  *         nothing
 488  ********************************************************************* */
 489
 490 static void sbmac_mii_sync(struct sbmac_softc *s)
 491 {
 492         int cnt;
 493         uint64_t bits;
 494         int mac_mdio_genc;
 495
 496         mac_mdio_genc = __raw_readq(s->sbm_mdio) & M_MAC_GENC;
 497
 498         bits = M_MAC_MDIO_DIR_OUTPUT | M_MAC_MDIO_OUT;
 499
 500         __raw_writeq(bits | mac_mdio_genc, s->sbm_mdio);
 501
 502         for (cnt = 0; cnt < 32; cnt++) {
 503                 __raw_writeq(bits | M_MAC_MDC | mac_mdio_genc, s->sbm_mdio);
 504                 __raw_writeq(bits | mac_mdio_genc, s->sbm_mdio);
 505         }
 506 }
 507
 508 /**********************************************************************
 509  *  SBMAC_MII_SENDDATA(s,data,bitcnt)
 510  *
 511  *  Send some bits to the MII.  The bits to be sent are right-
 512  *  justified in the 'data' parameter.
 513  *
 514  *  Input parameters:
 515  *         s - sbmac structure
 516  *         data - data to send
 517  *         bitcnt - number of bits to send
 518  ********************************************************************* */
 519
 520 static void sbmac_mii_senddata(struct sbmac_softc *s,unsigned int data, int bitcnt)
 521 {
 522         int i;
 523         uint64_t bits;
 524         unsigned int curmask;
 525         int mac_mdio_genc;
 526
 527         mac_mdio_genc = __raw_readq(s->sbm_mdio) & M_MAC_GENC;
 528
 529         bits = M_MAC_MDIO_DIR_OUTPUT;
 530         __raw_writeq(bits | mac_mdio_genc, s->sbm_mdio);
 531
 532         curmask = 1 << (bitcnt - 1);
 533
 534         for (i = 0; i < bitcnt; i++) {
 535                 if (data & curmask)
 536                         bits |= M_MAC_MDIO_OUT;
 537                 else bits &= ~M_MAC_MDIO_OUT;
 538                 __raw_writeq(bits | mac_mdio_genc, s->sbm_mdio);
 539                 __raw_writeq(bits | M_MAC_MDC | mac_mdio_genc, s->sbm_mdio);
 540                 __raw_writeq(bits | mac_mdio_genc, s->sbm_mdio);
 541                 curmask >>= 1;
 542         }
 543 }
 544
 545
 546
 547 /**********************************************************************
 548  *  SBMAC_MII_READ(s,phyaddr,regidx)
 549  *
 550  *  Read a PHY register.
 551  *
 552  *  Input parameters:
 553  *         s - sbmac structure
 554  *         phyaddr - PHY's address
 555  *         regidx = index of register to read
 556  *
 557  *  Return value:
 558  *         value read, or 0 if an error occurred.
 559  ********************************************************************* */
 560
 561 static unsigned int sbmac_mii_read(struct sbmac_softc *s,int phyaddr,int regidx)
 562 {
 563         int idx;
 564         int error;
 565         int regval;
 566         int mac_mdio_genc;
 567
 568         /*
 569          * Synchronize ourselves so that the PHY knows the next
 570          * thing coming down is a command
 571          */
 572
 573         sbmac_mii_sync(s);
 574
 575         /*
 576          * Send the data to the PHY.  The sequence is
 577          * a "start" command (2 bits)
 578          * a "read" command (2 bits)
 579          * the PHY addr (5 bits)
 580          * the register index (5 bits)
 581          */
 582
 583         sbmac_mii_senddata(s,MII_COMMAND_START, 2);
 584         sbmac_mii_senddata(s,MII_COMMAND_READ, 2);
 585         sbmac_mii_senddata(s,phyaddr, 5);
 586         sbmac_mii_senddata(s,regidx, 5);
 587
 588         mac_mdio_genc = __raw_readq(s->sbm_mdio) & M_MAC_GENC;
 589
 590         /*
 591          * Switch the port around without a clock transition.
 592          */
 593         __raw_writeq(M_MAC_MDIO_DIR_INPUT | mac_mdio_genc, s->sbm_mdio);
 594
 595         /*
 596          * Send out a clock pulse to signal we want the status
 597          */
 598
 599         __raw_writeq(M_MAC_MDIO_DIR_INPUT | M_MAC_MDC | mac_mdio_genc, s->sbm_mdio);
 600         __raw_writeq(M_MAC_MDIO_DIR_INPUT | mac_mdio_genc, s->sbm_mdio);
 601
 602         /*
 603          * If an error occurred, the PHY will signal '1' back
 604          */
 605         error = __raw_readq(s->sbm_mdio) & M_MAC_MDIO_IN;
 606
 607         /*
 608          * Issue an 'idle' clock pulse, but keep the direction
 609          * the same.
 610          */
 611         __raw_writeq(M_MAC_MDIO_DIR_INPUT | M_MAC_MDC | mac_mdio_genc, s->sbm_mdio);
 612         __raw_writeq(M_MAC_MDIO_DIR_INPUT | mac_mdio_genc, s->sbm_mdio);
 613
 614         regval = 0;
 615
 616         for (idx = 0; idx < 16; idx++) {
 617                 regval <<= 1;
 618
 619                 if (error == 0) {
 620                         if (__raw_readq(s->sbm_mdio) & M_MAC_MDIO_IN)
 621                                 regval |= 1;
 622                 }
 623
 624                 __raw_writeq(M_MAC_MDIO_DIR_INPUT|M_MAC_MDC | mac_mdio_genc, s->sbm_mdio);
 625                 __raw_writeq(M_MAC_MDIO_DIR_INPUT | mac_mdio_genc, s->sbm_mdio);
 626         }
 627
 628         /* Switch back to output */
 629         __raw_writeq(M_MAC_MDIO_DIR_OUTPUT | mac_mdio_genc, s->sbm_mdio);
 630
 631         if (error == 0)
 632                 return regval;
 633         return 0;
 634 }
 635
 636
 637 /**********************************************************************
 638  *  SBMAC_MII_WRITE(s,phyaddr,regidx,regval)
 639  *
 640  *  Write a value to a PHY register.
 641  *
 642  *  Input parameters:
 643  *         s - sbmac structure
 644  *         phyaddr - PHY to use
 645  *         regidx - register within the PHY
 646  *         regval - data to write to register
 647  *
 648  *  Return value:
 649  *         nothing
 650  ********************************************************************* */
 651
 652 static void sbmac_mii_write(struct sbmac_softc *s,int phyaddr,int regidx,
 653                             unsigned int regval)
 654 {
 655         int mac_mdio_genc;
 656
 657         sbmac_mii_sync(s);
 658
 659         sbmac_mii_senddata(s,MII_COMMAND_START,2);
 660         sbmac_mii_senddata(s,MII_COMMAND_WRITE,2);
 661         sbmac_mii_senddata(s,phyaddr, 5);
 662         sbmac_mii_senddata(s,regidx, 5);
 663         sbmac_mii_senddata(s,MII_COMMAND_ACK,2);
 664         sbmac_mii_senddata(s,regval,16);
 665
 666         mac_mdio_genc = __raw_readq(s->sbm_mdio) & M_MAC_GENC;
 667
 668         __raw_writeq(M_MAC_MDIO_DIR_OUTPUT | mac_mdio_genc, s->sbm_mdio);
 669 }
 670
 671
 672
 673 /**********************************************************************
 674  *  SBDMA_INITCTX(d,s,chan,txrx,maxdescr)
 675  *
 676  *  Initialize a DMA channel context.  Since there are potentially
 677  *  eight DMA channels per MAC, it's nice to do this in a standard
 678  *  way.
 679  *
 680  *  Input parameters:
 681  *         d - sbmacdma_t structure (DMA channel context)
 682  *         s - sbmac_softc structure (pointer to a MAC)
 683  *         chan - channel number (0..1 right now)
 684  *         txrx - Identifies DMA_TX or DMA_RX for channel direction
 685  *      maxdescr - number of descriptors
 686  *
 687  *  Return value:
 688  *         nothing
 689  ********************************************************************* */
 690
 691 static void sbdma_initctx(sbmacdma_t *d,
 692                           struct sbmac_softc *s,
 693                           int chan,
 694                           int txrx,
 695                           int maxdescr)
 696 {
 697 #ifdef CONFIG_SBMAC_COALESCE
 698         int int_pktcnt, int_timeout;
 699 #endif
 700
 701         /*
 702          * Save away interesting stuff in the structure
 703          */
 704
 705         d->sbdma_eth       = s;
 706         d->sbdma_channel   = chan;
 707         d->sbdma_txdir     = txrx;
 708
 709 #if 0
 710         /* RMON clearing */
 711         s->sbe_idx =(s->sbm_base - A_MAC_BASE_0)/MAC_SPACING;
 712 #endif
 713
 714         __raw_writeq(0, IOADDR(A_MAC_REGISTER(s->sbe_idx, R_MAC_RMON_TX_BYTES)));
 715         __raw_writeq(0, IOADDR(A_MAC_REGISTER(s->sbe_idx, R_MAC_RMON_COLLISIONS)));
 716         __raw_writeq(0, IOADDR(A_MAC_REGISTER(s->sbe_idx, R_MAC_RMON_LATE_COL)));
 717         __raw_writeq(0, IOADDR(A_MAC_REGISTER(s->sbe_idx, R_MAC_RMON_EX_COL)));
 718         __raw_writeq(0, IOADDR(A_MAC_REGISTER(s->sbe_idx, R_MAC_RMON_FCS_ERROR)));
 719         __raw_writeq(0, IOADDR(A_MAC_REGISTER(s->sbe_idx, R_MAC_RMON_TX_ABORT)));
 720         __raw_writeq(0, IOADDR(A_MAC_REGISTER(s->sbe_idx, R_MAC_RMON_TX_BAD)));
 721         __raw_writeq(0, IOADDR(A_MAC_REGISTER(s->sbe_idx, R_MAC_RMON_TX_GOOD)));
 722         __raw_writeq(0, IOADDR(A_MAC_REGISTER(s->sbe_idx, R_MAC_RMON_TX_RUNT)));
 723         __raw_writeq(0, IOADDR(A_MAC_REGISTER(s->sbe_idx, R_MAC_RMON_TX_OVERSIZE)));
 724         __raw_writeq(0, IOADDR(A_MAC_REGISTER(s->sbe_idx, R_MAC_RMON_RX_BYTES)));
 725         __raw_writeq(0, IOADDR(A_MAC_REGISTER(s->sbe_idx, R_MAC_RMON_RX_MCAST)));
 726         __raw_writeq(0, IOADDR(A_MAC_REGISTER(s->sbe_idx, R_MAC_RMON_RX_BCAST)));
 727         __raw_writeq(0, IOADDR(A_MAC_REGISTER(s->sbe_idx, R_MAC_RMON_RX_BAD)));
 728         __raw_writeq(0, IOADDR(A_MAC_REGISTER(s->sbe_idx, R_MAC_RMON_RX_GOOD)));
 729         __raw_writeq(0, IOADDR(A_MAC_REGISTER(s->sbe_idx, R_MAC_RMON_RX_RUNT)));
 730         __raw_writeq(0, IOADDR(A_MAC_REGISTER(s->sbe_idx, R_MAC_RMON_RX_OVERSIZE)));
 731         __raw_writeq(0, IOADDR(A_MAC_REGISTER(s->sbe_idx, R_MAC_RMON_RX_FCS_ERROR)));
 732         __raw_writeq(0, IOADDR(A_MAC_REGISTER(s->sbe_idx, R_MAC_RMON_RX_LENGTH_ERROR)));
 733         __raw_writeq(0, IOADDR(A_MAC_REGISTER(s->sbe_idx, R_MAC_RMON_RX_CODE_ERROR)));
 734         __raw_writeq(0, IOADDR(A_MAC_REGISTER(s->sbe_idx, R_MAC_RMON_RX_ALIGN_ERROR)));
 735
 736         /*
 737          * initialize register pointers
 738          */
 739
 740         d->sbdma_config0 =
 741                 s->sbm_base + R_MAC_DMA_REGISTER(txrx,chan,R_MAC_DMA_CONFIG0);
 742         d->sbdma_config1 =
 743                 s->sbm_base + R_MAC_DMA_REGISTER(txrx,chan,R_MAC_DMA_CONFIG1);
 744         d->sbdma_dscrbase =
 745                 s->sbm_base + R_MAC_DMA_REGISTER(txrx,chan,R_MAC_DMA_DSCR_BASE);
 746         d->sbdma_dscrcnt =
 747                 s->sbm_base + R_MAC_DMA_REGISTER(txrx,chan,R_MAC_DMA_DSCR_CNT);
 748         d->sbdma_curdscr =
 749                 s->sbm_base + R_MAC_DMA_REGISTER(txrx,chan,R_MAC_DMA_CUR_DSCRADDR);
 750         if (d->sbdma_txdir)
 751                 d->sbdma_oodpktlost = NULL;
 752         else
 753                 d->sbdma_oodpktlost =
 754                         s->sbm_base + R_MAC_DMA_REGISTER(txrx,chan,R_MAC_DMA_OODPKTLOST_RX);
 755
 756         /*
 757          * Allocate memory for the ring
 758          */
 759
 760         d->sbdma_maxdescr = maxdescr;
 761
 762         d->sbdma_dscrtable_unaligned =
 763         d->sbdma_dscrtable = (sbdmadscr_t *)
 764                 kmalloc((d->sbdma_maxdescr+1)*sizeof(sbdmadscr_t), GFP_KERNEL);
 765
 766         /*
 767          * The descriptor table must be aligned to at least 16 bytes or the
 768          * MAC will corrupt it.
 769          */
 770         d->sbdma_dscrtable = (sbdmadscr_t *)
 771                 ALIGN((unsigned long)d->sbdma_dscrtable, sizeof(sbdmadscr_t));
 772
 773         memset(d->sbdma_dscrtable,0,d->sbdma_maxdescr*sizeof(sbdmadscr_t));
 774
 775         d->sbdma_dscrtable_end = d->sbdma_dscrtable + d->sbdma_maxdescr;
 776
 777         d->sbdma_dscrtable_phys = virt_to_phys(d->sbdma_dscrtable);
 778
 779         /*
 780          * And context table
 781          */
 782
 783         d->sbdma_ctxtable = (struct sk_buff **)
 784                 kmalloc(d->sbdma_maxdescr*sizeof(struct sk_buff *), GFP_KERNEL);
 785
 786         memset(d->sbdma_ctxtable,0,d->sbdma_maxdescr*sizeof(struct sk_buff *));
 787
 788 #ifdef CONFIG_SBMAC_COALESCE
 789         /*
 790          * Setup Rx/Tx DMA coalescing defaults
 791          */
 792
 793         int_pktcnt = (txrx == DMA_TX) ? int_pktcnt_tx : int_pktcnt_rx;
 794         if ( int_pktcnt ) {
 795                 d->sbdma_int_pktcnt = int_pktcnt;
 796         } else {
 797                 d->sbdma_int_pktcnt = 1;
 798         }
 799
 800         int_timeout = (txrx == DMA_TX) ? int_timeout_tx : int_timeout_rx;
 801         if ( int_timeout ) {
 802                 d->sbdma_int_timeout = int_timeout;
 803         } else {
 804                 d->sbdma_int_timeout = 0;
 805         }
 806 #endif
 807
 808 }
 809
 810 /**********************************************************************
 811  *  SBDMA_CHANNEL_START(d)
 812  *
 813  *  Initialize the hardware registers for a DMA channel.
 814  *
 815  *  Input parameters:
 816  *         d - DMA channel to init (context must be previously init'd
 817  *         rxtx - DMA_RX or DMA_TX depending on what type of channel
 818  *
 819  *  Return value:
 820  *         nothing
 821  ********************************************************************* */
 822
 823 static void sbdma_channel_start(sbmacdma_t *d, int rxtx )
 824 {
 825         /*
 826          * Turn on the DMA channel
 827          */
 828
 829 #ifdef CONFIG_SBMAC_COALESCE
 830         __raw_writeq(V_DMA_INT_TIMEOUT(d->sbdma_int_timeout) |
 831                        0, d->sbdma_config1);
 832         __raw_writeq(M_DMA_EOP_INT_EN |
 833                        V_DMA_RINGSZ(d->sbdma_maxdescr) |
 834                        V_DMA_INT_PKTCNT(d->sbdma_int_pktcnt) |
 835                        0, d->sbdma_config0);
 836 #else
 837         __raw_writeq(0, d->sbdma_config1);
 838         __raw_writeq(V_DMA_RINGSZ(d->sbdma_maxdescr) |
 839                        0, d->sbdma_config0);
 840 #endif
 841
 842         __raw_writeq(d->sbdma_dscrtable_phys, d->sbdma_dscrbase);
 843
 844         /*
 845          * Initialize ring pointers
 846          */
 847
 848         d->sbdma_addptr = d->sbdma_dscrtable;
 849         d->sbdma_remptr = d->sbdma_dscrtable;
 850 }
 851
 852 /**********************************************************************
 853  *  SBDMA_CHANNEL_STOP(d)
 854  *
 855  *  Initialize the hardware registers for a DMA channel.
 856  *
 857  *  Input parameters:
 858  *         d - DMA channel to init (context must be previously init'd
 859  *
 860  *  Return value:
 861  *         nothing
 862  ********************************************************************* */
 863
 864 static void sbdma_channel_stop(sbmacdma_t *d)
 865 {
 866         /*
 867          * Turn off the DMA channel
 868          */
 869
 870         __raw_writeq(0, d->sbdma_config1);
 871
 872         __raw_writeq(0, d->sbdma_dscrbase);
 873
 874         __raw_writeq(0, d->sbdma_config0);
 875
 876         /*
 877          * Zero ring pointers
 878          */
 879
 880         d->sbdma_addptr = NULL;
 881         d->sbdma_remptr = NULL;
 882 }
 883
 884 static void sbdma_align_skb(struct sk_buff *skb,int power2,int offset)
 885 {
 886         unsigned long addr;
 887         unsigned long newaddr;
 888
 889         addr = (unsigned long) skb->data;
 890
 891         newaddr = (addr + power2 - 1) & ~(power2 - 1);
 892
 893         skb_reserve(skb,newaddr-addr+offset);
 894 }
 895
 896
 897 /**********************************************************************
 898  *  SBDMA_ADD_RCVBUFFER(d,sb)
 899  *
 900  *  Add a buffer to the specified DMA channel.   For receive channels,
 901  *  this queues a buffer for inbound packets.
 902  *
 903  *  Input parameters:
 904  *         d - DMA channel descriptor
 905  *         sb - sk_buff to add, or NULL if we should allocate one
 906  *
 907  *  Return value:
 908  *         0 if buffer could not be added (ring is full)
 909  *         1 if buffer added successfully
 910  ********************************************************************* */
 911
 912
 913 static int sbdma_add_rcvbuffer(sbmacdma_t *d,struct sk_buff *sb)
 914 {
 915         sbdmadscr_t *dsc;
 916         sbdmadscr_t *nextdsc;
 917         struct sk_buff *sb_new = NULL;
 918         int pktsize = ENET_PACKET_SIZE;
 919
 920         /* get pointer to our current place in the ring */
 921
 922         dsc = d->sbdma_addptr;
 923         nextdsc = SBDMA_NEXTBUF(d,sbdma_addptr);
 924
 925         /*
 926          * figure out if the ring is full - if the next descriptor
 927          * is the same as the one that we're going to remove from
 928          * the ring, the ring is full
 929          */
 930
 931         if (nextdsc == d->sbdma_remptr) {
 932                 return -ENOSPC;
 933         }
 934
 935         /*
 936          * Allocate a sk_buff if we don't already have one.
 937          * If we do have an sk_buff, reset it so that it's empty.
 938          *
 939          * Note: sk_buffs don't seem to be guaranteed to have any sort
 940          * of alignment when they are allocated.  Therefore, allocate enough
 941          * extra space to make sure that:
 942          *
 943          *    1. the data does not start in the middle of a cache line.
 944          *    2. The data does not end in the middle of a cache line
 945          *    3. The buffer can be aligned such that the IP addresses are
 946          *       naturally aligned.
 947          *
 948          *  Remember, the SOCs MAC writes whole cache lines at a time,
 949          *  without reading the old contents first.  So, if the sk_buff's
 950          *  data portion starts in the middle of a cache line, the SOC
 951          *  DMA will trash the beginning (and ending) portions.
 952          */
 953
 954         if (sb == NULL) {
 955                 sb_new = dev_alloc_skb(ENET_PACKET_SIZE + SMP_CACHE_BYTES * 2 + ETHER_ALIGN);
 956                 if (sb_new == NULL) {
 957                         printk(KERN_INFO "%s: sk_buff allocation failed\n",
 958                                d->sbdma_eth->sbm_dev->name);
 959                         return -ENOBUFS;
 960                 }
 961
 962                 sbdma_align_skb(sb_new, SMP_CACHE_BYTES, ETHER_ALIGN);
 963         }
 964         else {
 965                 sb_new = sb;
 966                 /*
 967                  * nothing special to reinit buffer, it's already aligned
 968                  * and sb->data already points to a good place.
 969                  */
 970         }
 971
 972         /*
 973          * fill in the descriptor
 974          */
 975
 976 #ifdef CONFIG_SBMAC_COALESCE
 977         /*
 978          * Do not interrupt per DMA transfer.
 979          */
 980         dsc->dscr_a = virt_to_phys(sb_new->data) |
 981                 V_DMA_DSCRA_A_SIZE(NUMCACHEBLKS(pktsize+ETHER_ALIGN)) | 0;
 982 #else
 983         dsc->dscr_a = virt_to_phys(sb_new->data) |
 984                 V_DMA_DSCRA_A_SIZE(NUMCACHEBLKS(pktsize+ETHER_ALIGN)) |
 985                 M_DMA_DSCRA_INTERRUPT;
 986 #endif
 987
 988         /* receiving: no options */
 989         dsc->dscr_b = 0;
 990
 991         /*
 992          * fill in the context
 993          */
 994
 995         d->sbdma_ctxtable[dsc-d->sbdma_dscrtable] = sb_new;
 996
 997         /*
 998          * point at next packet
 999          */
1000
1001         d->sbdma_addptr = nextdsc;
1002
1003         /*
1004          * Give the buffer to the DMA engine.
1005          */
1006
1007         __raw_writeq(1, d->sbdma_dscrcnt);
1008
1009         return 0;                                       /* we did it */
1010 }
1011
1012 /**********************************************************************
1013  *  SBDMA_ADD_TXBUFFER(d,sb)
1014  *
1015  *  Add a transmit buffer to the specified DMA channel, causing a
1016  *  transmit to start.
1017  *
1018  *  Input parameters:
1019  *         d - DMA channel descriptor
1020  *         sb - sk_buff to add
1021  *
1022  *  Return value:
1023  *         0 transmit queued successfully
1024  *         otherwise error code
1025  ********************************************************************* */
1026
1027
1028 static int sbdma_add_txbuffer(sbmacdma_t *d,struct sk_buff *sb)
1029 {
1030         sbdmadscr_t *dsc;
1031         sbdmadscr_t *nextdsc;
1032         uint64_t phys;
1033         uint64_t ncb;
1034         int length;
1035
1036         /* get pointer to our current place in the ring */
1037
1038         dsc = d->sbdma_addptr;
1039         nextdsc = SBDMA_NEXTBUF(d,sbdma_addptr);
1040
1041         /*
1042          * figure out if the ring is full - if the next descriptor
1043          * is the same as the one that we're going to remove from
1044          * the ring, the ring is full
1045          */
1046
1047         if (nextdsc == d->sbdma_remptr) {
1048                 return -ENOSPC;
1049         }
1050
1051         /*
1052          * Under Linux, it's not necessary to copy/coalesce buffers
1053          * like it is on NetBSD.  We think they're all contiguous,
1054          * but that may not be true for GBE.
1055          */
1056
1057         length = sb->len;
1058
1059         /*
1060          * fill in the descriptor.  Note that the number of cache
1061          * blocks in the descriptor is the number of blocks
1062          * *spanned*, so we need to add in the offset (if any)
1063          * while doing the calculation.
1064          */
1065
1066         phys = virt_to_phys(sb->data);
1067         ncb = NUMCACHEBLKS(length+(phys & (SMP_CACHE_BYTES - 1)));
1068
1069         dsc->dscr_a = phys |
1070                 V_DMA_DSCRA_A_SIZE(ncb) |
1071 #ifndef CONFIG_SBMAC_COALESCE
1072                 M_DMA_DSCRA_INTERRUPT |
1073 #endif
1074                 M_DMA_ETHTX_SOP;
1075
1076         /* transmitting: set outbound options and length */
1077
1078         dsc->dscr_b = V_DMA_DSCRB_OPTIONS(K_DMA_ETHTX_APPENDCRC_APPENDPAD) |
1079                 V_DMA_DSCRB_PKT_SIZE(length);
1080
1081         /*
1082          * fill in the context
1083          */
1084
1085         d->sbdma_ctxtable[dsc-d->sbdma_dscrtable] = sb;
1086
1087         /*
1088          * point at next packet
1089          */
1090
1091         d->sbdma_addptr = nextdsc;
1092
1093         /*
1094          * Give the buffer to the DMA engine.
1095          */
1096
1097         __raw_writeq(1, d->sbdma_dscrcnt);
1098
1099         return 0;                                       /* we did it */
1100 }
1101
1102
1103
1104
1105 /**********************************************************************
1106  *  SBDMA_EMPTYRING(d)
1107  *
1108  *  Free all allocated sk_buffs on the specified DMA channel;
1109  *
1110  *  Input parameters:
1111  *         d  - DMA channel
1112  *
1113  *  Return value:
1114  *         nothing
1115  ********************************************************************* */
1116
1117 static void sbdma_emptyring(sbmacdma_t *d)
1118 {
1119         int idx;
1120         struct sk_buff *sb;
1121
1122         for (idx = 0; idx < d->sbdma_maxdescr; idx++) {
1123                 sb = d->sbdma_ctxtable[idx];
1124                 if (sb) {
1125                         dev_kfree_skb(sb);
1126                         d->sbdma_ctxtable[idx] = NULL;
1127                 }
1128         }
1129 }
1130
1131
1132 /**********************************************************************
1133  *  SBDMA_FILLRING(d)
1134  *
1135  *  Fill the specified DMA channel (must be receive channel)
1136  *  with sk_buffs
1137  *
1138  *  Input parameters:
1139  *         d - DMA channel
1140  *
1141  *  Return value:
1142  *         nothing
1143  ********************************************************************* */
1144
1145 static void sbdma_fillring(sbmacdma_t *d)
1146 {
1147         int idx;
1148
1149         for (idx = 0; idx < SBMAC_MAX_RXDESCR-1; idx++) {
1150                 if (sbdma_add_rcvbuffer(d,NULL) != 0)
1151                         break;
1152         }
1153 }
1154
1155 #ifdef CONFIG_NET_POLL_CONTROLLER
1156 static void sbmac_netpoll(struct net_device *netdev)
1157 {
1158         struct sbmac_softc *sc = netdev_priv(netdev);
1159         int irq = sc->sbm_dev->irq;
1160
1161         __raw_writeq(0, sc->sbm_imr);
1162
1163         sbmac_intr(irq, netdev);
1164
1165 #ifdef CONFIG_SBMAC_COALESCE
1166         __raw_writeq(((M_MAC_INT_EOP_COUNT | M_MAC_INT_EOP_TIMER) << S_MAC_TX_CH0) |
1167         ((M_MAC_INT_EOP_COUNT | M_MAC_INT_EOP_TIMER) << S_MAC_RX_CH0),
1168         sc->sbm_imr);
1169 #else
1170         __raw_writeq((M_MAC_INT_CHANNEL << S_MAC_TX_CH0) |
1171         (M_MAC_INT_CHANNEL << S_MAC_RX_CH0), sc->sbm_imr);
1172 #endif
1173 }
1174 #endif
1175
1176 /**********************************************************************
1177  *  SBDMA_RX_PROCESS(sc,d,work_to_do,poll)
1178  *
1179  *  Process "completed" receive buffers on the specified DMA channel.
1180  *
1181  *  Input parameters:
1182  *            sc - softc structure
1183  *             d - DMA channel context
1184  *    work_to_do - no. of packets to process before enabling interrupt
1185  *                 again (for NAPI)
1186  *          poll - 1: using polling (for NAPI)
1187  *
1188  *  Return value:
1189  *         nothing
1190  ********************************************************************* */
1191
1192 static int sbdma_rx_process(struct sbmac_softc *sc,sbmacdma_t *d,
1193                              int work_to_do, int poll)
1194 {
1195         int curidx;
1196         int hwidx;
1197         sbdmadscr_t *dsc;
1198         struct sk_buff *sb;
1199         int len;
1200         int work_done = 0;
1201         int dropped = 0;
1202
1203         prefetch(d);
1204
1205 again:
1206         /* Check if the HW dropped any frames */
1207         sc->sbm_stats.rx_fifo_errors
1208             += __raw_readq(sc->sbm_rxdma.sbdma_oodpktlost) & 0xffff;
1209         __raw_writeq(0, sc->sbm_rxdma.sbdma_oodpktlost);
1210
1211         while (work_to_do-- > 0) {
1212                 /*
1213                  * figure out where we are (as an index) and where
1214                  * the hardware is (also as an index)
1215                  *
1216                  * This could be done faster if (for example) the
1217                  * descriptor table was page-aligned and contiguous in
1218                  * both virtual and physical memory -- you could then
1219                  * just compare the low-order bits of the virtual address
1220                  * (sbdma_remptr) and the physical address (sbdma_curdscr CSR)
1221                  */
1222
1223                 dsc = d->sbdma_remptr;
1224                 curidx = dsc - d->sbdma_dscrtable;
1225
1226                 prefetch(dsc);
1227                 prefetch(&d->sbdma_ctxtable[curidx]);
1228
1229                 hwidx = (int) (((__raw_readq(d->sbdma_curdscr) & M_DMA_CURDSCR_ADDR) -
1230                                 d->sbdma_dscrtable_phys) / sizeof(sbdmadscr_t));
1231
1232                 /*
1233                  * If they're the same, that means we've processed all
1234                  * of the descriptors up to (but not including) the one that
1235                  * the hardware is working on right now.
1236                  */
1237
1238                 if (curidx == hwidx)
1239                         goto done;
1240
1241                 /*
1242                  * Otherwise, get the packet's sk_buff ptr back
1243                  */
1244
1245                 sb = d->sbdma_ctxtable[curidx];
1246                 d->sbdma_ctxtable[curidx] = NULL;
1247
1248                 len = (int)G_DMA_DSCRB_PKT_SIZE(dsc->dscr_b) - 4;
1249
1250                 /*
1251                  * Check packet status.  If good, process it.
1252                  * If not, silently drop it and put it back on the
1253                  * receive ring.
1254                  */
1255
1256                 if (likely (!(dsc->dscr_a & M_DMA_ETHRX_BAD))) {
1257
1258                         /*
1259                          * Add a new buffer to replace the old one.  If we fail
1260                          * to allocate a buffer, we're going to drop this
1261                          * packet and put it right back on the receive ring.
1262                          */
1263
1264                         if (unlikely (sbdma_add_rcvbuffer(d,NULL) ==
1265                                       -ENOBUFS)) {
1266                                 sc->sbm_stats.rx_dropped++;
1267                                 sbdma_add_rcvbuffer(d,sb); /* re-add old buffer */
1268                                 /* No point in continuing at the moment */
1269                                 printk(KERN_ERR "dropped packet (1)\n");
1270                                 d->sbdma_remptr = SBDMA_NEXTBUF(d,sbdma_remptr);
1271                                 goto done;
1272                         } else {
1273                                 /*
1274                                  * Set length into the packet
1275                                  */
1276                                 skb_put(sb,len);
1277
1278                                 /*
1279                                  * Buffer has been replaced on the
1280                                  * receive ring.  Pass the buffer to
1281                                  * the kernel
1282                                  */
1283                                 sb->protocol = eth_type_trans(sb,d->sbdma_eth->sbm_dev);
1284                                 /* Check hw IPv4/TCP checksum if supported */
1285                                 if (sc->rx_hw_checksum == ENABLE) {
1286                                         if (!((dsc->dscr_a) & M_DMA_ETHRX_BADIP4CS) &&
1287                                             !((dsc->dscr_a) & M_DMA_ETHRX_BADTCPCS)) {
1288                                                 sb->ip_summed = CHECKSUM_UNNECESSARY;
1289                                                 /* don't need to set sb->csum */
1290                                         } else {
1291                                                 sb->ip_summed = CHECKSUM_NONE;
1292                                         }
1293                                 }
1294                                 prefetch(sb->data);
1295                                 prefetch((const void *)(((char *)sb->data)+32));
1296                                 if (poll)
1297                                         dropped = netif_receive_skb(sb);
1298                                 else
1299                                         dropped = netif_rx(sb);
1300
1301                                 if (dropped == NET_RX_DROP) {
1302                                         sc->sbm_stats.rx_dropped++;
1303                                         d->sbdma_remptr = SBDMA_NEXTBUF(d,sbdma_remptr);
1304                                         goto done;
1305                                 }
1306                                 else {
1307                                         sc->sbm_stats.rx_bytes += len;
1308                                         sc->sbm_stats.rx_packets++;
1309                                 }
1310                         }
1311                 } else {
1312                         /*
1313                          * Packet was mangled somehow.  Just drop it and
1314                          * put it back on the receive ring.
1315                          */
1316                         sc->sbm_stats.rx_errors++;
1317                         sbdma_add_rcvbuffer(d,sb);
1318                 }
1319
1320
1321                 /*
1322                  * .. and advance to the next buffer.
1323                  */
1324
1325                 d->sbdma_remptr = SBDMA_NEXTBUF(d,sbdma_remptr);
1326                 work_done++;
1327         }
1328         if (!poll) {
1329                 work_to_do = 32;
1330                 goto again; /* collect fifo drop statistics again */
1331         }
1332 done:
1333         return work_done;
1334 }
1335
1336 /**********************************************************************
1337  *  SBDMA_TX_PROCESS(sc,d)
1338  *
1339  *  Process "completed" transmit buffers on the specified DMA channel.
1340  *  This is normally called within the interrupt service routine.
1341  *  Note that this isn't really ideal for priority channels, since
1342  *  it processes all of the packets on a given channel before
1343  *  returning.
1344  *
1345  *  Input parameters:
1346  *      sc - softc structure
1347  *       d - DMA channel context
1348  *    poll - 1: using polling (for NAPI)
1349  *
1350  *  Return value:
1351  *         nothing
1352  ********************************************************************* */
1353
1354 static void sbdma_tx_process(struct sbmac_softc *sc,sbmacdma_t *d, int poll)
1355 {
1356         int curidx;
1357         int hwidx;
1358         sbdmadscr_t *dsc;
1359         struct sk_buff *sb;
1360         unsigned long flags;
1361         int packets_handled = 0;
1362
1363         spin_lock_irqsave(&(sc->sbm_lock), flags);
1364
1365         if (d->sbdma_remptr == d->sbdma_addptr)
1366           goto end_unlock;
1367
1368         hwidx = (int) (((__raw_readq(d->sbdma_curdscr) & M_DMA_CURDSCR_ADDR) -
1369                         d->sbdma_dscrtable_phys) / sizeof(sbdmadscr_t));
1370
1371         for (;;) {
1372                 /*
1373                  * figure out where we are (as an index) and where
1374                  * the hardware is (also as an index)
1375                  *
1376                  * This could be done faster if (for example) the
1377                  * descriptor table was page-aligned and contiguous in
1378                  * both virtual and physical memory -- you could then
1379                  * just compare the low-order bits of the virtual address
1380                  * (sbdma_remptr) and the physical address (sbdma_curdscr CSR)
1381                  */
1382
1383                 curidx = d->sbdma_remptr - d->sbdma_dscrtable;
1384
1385                 /*
1386                  * If they're the same, that means we've processed all
1387                  * of the descriptors up to (but not including) the one that
1388                  * the hardware is working on right now.
1389                  */
1390
1391                 if (curidx == hwidx)
1392                         break;
1393
1394                 /*
1395                  * Otherwise, get the packet's sk_buff ptr back
1396                  */
1397
1398                 dsc = &(d->sbdma_dscrtable[curidx]);
1399                 sb = d->sbdma_ctxtable[curidx];
1400                 d->sbdma_ctxtable[curidx] = NULL;
1401
1402                 /*
1403                  * Stats
1404                  */
1405
1406                 sc->sbm_stats.tx_bytes += sb->len;
1407                 sc->sbm_stats.tx_packets++;
1408
1409                 /*
1410                  * for transmits, we just free buffers.
1411                  */
1412
1413                 dev_kfree_skb_irq(sb);
1414
1415                 /*
1416                  * .. and advance to the next buffer.
1417                  */
1418
1419                 d->sbdma_remptr = SBDMA_NEXTBUF(d,sbdma_remptr);
1420
1421                 packets_handled++;
1422
1423         }
1424
1425         /*
1426          * Decide if we should wake up the protocol or not.
1427          * Other drivers seem to do this when we reach a low
1428          * watermark on the transmit queue.
1429          */
1430
1431         if (packets_handled)
1432                 netif_wake_queue(d->sbdma_eth->sbm_dev);
1433
1434 end_unlock:
1435         spin_unlock_irqrestore(&(sc->sbm_lock), flags);
1436
1437 }
1438
1439
1440
1441 /**********************************************************************
1442  *  SBMAC_INITCTX(s)
1443  *
1444  *  Initialize an Ethernet context structure - this is called
1445  *  once per MAC on the 1250.  Memory is allocated here, so don't
1446  *  call it again from inside the ioctl routines that bring the
1447  *  interface up/down
1448  *
1449  *  Input parameters:
1450  *         s - sbmac context structure
1451  *
1452  *  Return value:
1453  *         0
1454  ********************************************************************* */
1455
1456 static int sbmac_initctx(struct sbmac_softc *s)
1457 {
1458
1459         /*
1460          * figure out the addresses of some ports
1461          */
1462
1463         s->sbm_macenable = s->sbm_base + R_MAC_ENABLE;
1464         s->sbm_maccfg    = s->sbm_base + R_MAC_CFG;
1465         s->sbm_fifocfg   = s->sbm_base + R_MAC_THRSH_CFG;
1466         s->sbm_framecfg  = s->sbm_base + R_MAC_FRAMECFG;
1467         s->sbm_rxfilter  = s->sbm_base + R_MAC_ADFILTER_CFG;
1468         s->sbm_isr       = s->sbm_base + R_MAC_STATUS;
1469         s->sbm_imr       = s->sbm_base + R_MAC_INT_MASK;
1470         s->sbm_mdio      = s->sbm_base + R_MAC_MDIO;
1471
1472         s->sbm_phys[0]   = 1;
1473         s->sbm_phys[1]   = 0;
1474
1475         s->sbm_phy_oldbmsr = 0;
1476         s->sbm_phy_oldanlpar = 0;
1477         s->sbm_phy_oldk1stsr = 0;
1478         s->sbm_phy_oldlinkstat = 0;
1479
1480         /*
1481          * Initialize the DMA channels.  Right now, only one per MAC is used
1482          * Note: Only do this _once_, as it allocates memory from the kernel!
1483          */
1484
1485         sbdma_initctx(&(s->sbm_txdma),s,0,DMA_TX,SBMAC_MAX_TXDESCR);
1486         sbdma_initctx(&(s->sbm_rxdma),s,0,DMA_RX,SBMAC_MAX_RXDESCR);
1487
1488         /*
1489          * initial state is OFF
1490          */
1491
1492         s->sbm_state = sbmac_state_off;
1493
1494         /*
1495          * Initial speed is (XXX TEMP) 10MBit/s HDX no FC
1496          */
1497
1498         s->sbm_speed = sbmac_speed_10;
1499         s->sbm_duplex = sbmac_duplex_half;
1500         s->sbm_fc = sbmac_fc_disabled;
1501
1502         return 0;
1503 }
1504
1505
1506 static void sbdma_uninitctx(struct sbmacdma_s *d)
1507 {
1508         if (d->sbdma_dscrtable_unaligned) {
1509                 kfree(d->sbdma_dscrtable_unaligned);
1510                 d->sbdma_dscrtable_unaligned = d->sbdma_dscrtable = NULL;
1511         }
1512
1513         if (d->sbdma_ctxtable) {
1514                 kfree(d->sbdma_ctxtable);
1515                 d->sbdma_ctxtable = NULL;
1516         }
1517 }
1518
1519
1520 static void sbmac_uninitctx(struct sbmac_softc *sc)
1521 {
1522         sbdma_uninitctx(&(sc->sbm_txdma));
1523         sbdma_uninitctx(&(sc->sbm_rxdma));
1524 }
1525
1526
1527 /**********************************************************************
1528  *  SBMAC_CHANNEL_START(s)
1529  *
1530  *  Start packet processing on this MAC.
1531  *
1532  *  Input parameters:
1533  *         s - sbmac structure
1534  *
1535  *  Return value:
1536  *         nothing
1537  ********************************************************************* */
1538
1539 static void sbmac_channel_start(struct sbmac_softc *s)
1540 {
1541         uint64_t reg;
1542         volatile void __iomem *port;
1543         uint64_t cfg,fifo,framecfg;
1544         int idx, th_value;
1545
1546         /*
1547          * Don't do this if running
1548          */
1549
1550         if (s->sbm_state == sbmac_state_on)
1551                 return;
1552
1553         /*
1554          * Bring the controller out of reset, but leave it off.
1555          */
1556
1557         __raw_writeq(0, s->sbm_macenable);
1558
1559         /*
1560          * Ignore all received packets
1561          */
1562
1563         __raw_writeq(0, s->sbm_rxfilter);
1564
1565         /*
1566          * Calculate values for various control registers.
1567          */
1568
1569         cfg = M_MAC_RETRY_EN |
1570                 M_MAC_TX_HOLD_SOP_EN |
1571                 V_MAC_TX_PAUSE_CNT_16K |
1572                 M_MAC_AP_STAT_EN |
1573                 M_MAC_FAST_SYNC |
1574                 M_MAC_SS_EN |
1575                 0;
1576
1577         /*
1578          * Be sure that RD_THRSH+WR_THRSH <= 32 for pass1 pars
1579          * and make sure that RD_THRSH + WR_THRSH <=128 for pass2 and above
1580          * Use a larger RD_THRSH for gigabit
1581          */
1582         if (soc_type == K_SYS_SOC_TYPE_BCM1250 && periph_rev < 2)
1583                 th_value = 28;
1584         else
1585                 th_value = 64;
1586
1587         fifo = V_MAC_TX_WR_THRSH(4) |   /* Must be '4' or '8' */
1588                 ((s->sbm_speed == sbmac_speed_1000)
1589                  ? V_MAC_TX_RD_THRSH(th_value) : V_MAC_TX_RD_THRSH(4)) |
1590                 V_MAC_TX_RL_THRSH(4) |
1591                 V_MAC_RX_PL_THRSH(4) |
1592                 V_MAC_RX_RD_THRSH(4) |  /* Must be '4' */
1593                 V_MAC_RX_PL_THRSH(4) |
1594                 V_MAC_RX_RL_THRSH(8) |
1595                 0;
1596
1597         framecfg = V_MAC_MIN_FRAMESZ_DEFAULT |
1598                 V_MAC_MAX_FRAMESZ_DEFAULT |
1599                 V_MAC_BACKOFF_SEL(1);
1600
1601         /*
1602          * Clear out the hash address map
1603          */
1604
1605         port = s->sbm_base + R_MAC_HASH_BASE;
1606         for (idx = 0; idx < MAC_HASH_COUNT; idx++) {
1607                 __raw_writeq(0, port);
1608                 port += sizeof(uint64_t);
1609         }
1610
1611         /*
1612          * Clear out the exact-match table
1613          */
1614
1615         port = s->sbm_base + R_MAC_ADDR_BASE;
1616         for (idx = 0; idx < MAC_ADDR_COUNT; idx++) {
1617                 __raw_writeq(0, port);
1618                 port += sizeof(uint64_t);
1619         }
1620
1621         /*
1622          * Clear out the DMA Channel mapping table registers
1623          */
1624
1625         port = s->sbm_base + R_MAC_CHUP0_BASE;
1626         for (idx = 0; idx < MAC_CHMAP_COUNT; idx++) {
1627                 __raw_writeq(0, port);
1628                 port += sizeof(uint64_t);
1629         }
1630
1631
1632         port = s->sbm_base + R_MAC_CHLO0_BASE;
1633         for (idx = 0; idx < MAC_CHMAP_COUNT; idx++) {
1634                 __raw_writeq(0, port);
1635                 port += sizeof(uint64_t);
1636         }
1637
1638         /*
1639          * Program the hardware address.  It goes into the hardware-address
1640          * register as well as the first filter register.
1641          */
1642
1643         reg = sbmac_addr2reg(s->sbm_hwaddr);
1644
1645         port = s->sbm_base + R_MAC_ADDR_BASE;
1646         __raw_writeq(reg, port);
1647         port = s->sbm_base + R_MAC_ETHERNET_ADDR;
1648
1649 #ifdef CONFIG_SB1_PASS_1_WORKAROUNDS
1650         /*
1651          * Pass1 SOCs do not receive packets addressed to the
1652          * destination address in the R_MAC_ETHERNET_ADDR register.
1653          * Set the value to zero.
1654          */
1655         __raw_writeq(0, port);
1656 #else
1657         __raw_writeq(reg, port);
1658 #endif
1659
1660         /*
1661          * Set the receive filter for no packets, and write values
1662          * to the various config registers
1663          */
1664
1665         __raw_writeq(0, s->sbm_rxfilter);
1666         __raw_writeq(0, s->sbm_imr);
1667         __raw_writeq(framecfg, s->sbm_framecfg);
1668         __raw_writeq(fifo, s->sbm_fifocfg);
1669         __raw_writeq(cfg, s->sbm_maccfg);
1670
1671         /*
1672          * Initialize DMA channels (rings should be ok now)
1673          */
1674
1675         sbdma_channel_start(&(s->sbm_rxdma), DMA_RX);
1676         sbdma_channel_start(&(s->sbm_txdma), DMA_TX);
1677
1678         /*
1679          * Configure the speed, duplex, and flow control
1680          */
1681
1682         sbmac_set_speed(s,s->sbm_speed);
1683         sbmac_set_duplex(s,s->sbm_duplex,s->sbm_fc);
1684
1685         /*
1686          * Fill the receive ring
1687          */
1688
1689         sbdma_fillring(&(s->sbm_rxdma));
1690
1691         /*
1692          * Turn on the rest of the bits in the enable register
1693          */
1694
1695 #if defined(CONFIG_SIBYTE_BCM1x55) || defined(CONFIG_SIBYTE_BCM1x80)
1696         __raw_writeq(M_MAC_RXDMA_EN0 |
1697                        M_MAC_TXDMA_EN0, s->sbm_macenable);
1698 #elif defined(CONFIG_SIBYTE_SB1250) || defined(CONFIG_SIBYTE_BCM112X)
1699         __raw_writeq(M_MAC_RXDMA_EN0 |
1700                        M_MAC_TXDMA_EN0 |
1701                        M_MAC_RX_ENABLE |
1702                        M_MAC_TX_ENABLE, s->sbm_macenable);
1703 #else
1704 #error invalid SiByte MAC configuation
1705 #endif
1706
1707 #ifdef CONFIG_SBMAC_COALESCE
1708         __raw_writeq(((M_MAC_INT_EOP_COUNT | M_MAC_INT_EOP_TIMER) << S_MAC_TX_CH0) |
1709                        ((M_MAC_INT_EOP_COUNT | M_MAC_INT_EOP_TIMER) << S_MAC_RX_CH0), s->sbm_imr);
1710 #else
1711         __raw_writeq((M_MAC_INT_CHANNEL << S_MAC_TX_CH0) |
1712                        (M_MAC_INT_CHANNEL << S_MAC_RX_CH0), s->sbm_imr);
1713 #endif
1714
1715         /*
1716          * Enable receiving unicasts and broadcasts
1717          */
1718
1719         __raw_writeq(M_MAC_UCAST_EN | M_MAC_BCAST_EN, s->sbm_rxfilter);
1720
1721         /*
1722          * we're running now.
1723          */
1724
1725         s->sbm_state = sbmac_state_on;
1726
1727         /*
1728          * Program multicast addresses
1729          */
1730
1731         sbmac_setmulti(s);
1732
1733         /*
1734          * If channel was in promiscuous mode before, turn that on
1735          */
1736
1737         if (s->sbm_devflags & IFF_PROMISC) {
1738                 sbmac_promiscuous_mode(s,1);
1739         }
1740
1741 }
1742
1743
1744 /**********************************************************************
1745  *  SBMAC_CHANNEL_STOP(s)
1746  *
1747  *  Stop packet processing on this MAC.
1748  *
1749  *  Input parameters:
1750  *         s - sbmac structure
1751  *
1752  *  Return value:
1753  *         nothing
1754  ********************************************************************* */
1755
1756 static void sbmac_channel_stop(struct sbmac_softc *s)
1757 {
1758         /* don't do this if already stopped */
1759
1760         if (s->sbm_state == sbmac_state_off)
1761                 return;
1762
1763         /* don't accept any packets, disable all interrupts */
1764
1765         __raw_writeq(0, s->sbm_rxfilter);
1766         __raw_writeq(0, s->sbm_imr);
1767
1768         /* Turn off ticker */
1769
1770         /* XXX */
1771
1772         /* turn off receiver and transmitter */
1773
1774         __raw_writeq(0, s->sbm_macenable);
1775
1776         /* We're stopped now. */
1777
1778         s->sbm_state = sbmac_state_off;
1779
1780         /*
1781          * Stop DMA channels (rings should be ok now)
1782          */
1783
1784         sbdma_channel_stop(&(s->sbm_rxdma));
1785         sbdma_channel_stop(&(s->sbm_txdma));
1786
1787         /* Empty the receive and transmit rings */
1788
1789         sbdma_emptyring(&(s->sbm_rxdma));
1790         sbdma_emptyring(&(s->sbm_txdma));
1791
1792 }
1793
1794 /**********************************************************************
1795  *  SBMAC_SET_CHANNEL_STATE(state)
1796  *
1797  *  Set the channel's state ON or OFF
1798  *
1799  *  Input parameters:
1800  *         state - new state
1801  *
1802  *  Return value:
1803  *         old state
1804  ********************************************************************* */
1805 static sbmac_state_t sbmac_set_channel_state(struct sbmac_softc *sc,
1806                                              sbmac_state_t state)
1807 {
1808         sbmac_state_t oldstate = sc->sbm_state;
1809
1810         /*
1811          * If same as previous state, return
1812          */
1813
1814         if (state == oldstate) {
1815                 return oldstate;
1816         }
1817
1818         /*
1819          * If new state is ON, turn channel on
1820          */
1821
1822         if (state == sbmac_state_on) {
1823                 sbmac_channel_start(sc);
1824         }
1825         else {
1826                 sbmac_channel_stop(sc);
1827         }
1828
1829         /*
1830          * Return previous state
1831          */
1832
1833         return oldstate;
1834 }
1835
1836
1837 /**********************************************************************
1838  *  SBMAC_PROMISCUOUS_MODE(sc,onoff)
1839  *
1840  *  Turn on or off promiscuous mode
1841  *
1842  *  Input parameters:
1843  *         sc - softc
1844  *      onoff - 1 to turn on, 0 to turn off
1845  *
1846  *  Return value:
1847  *         nothing
1848  ********************************************************************* */
1849
1850 static void sbmac_promiscuous_mode(struct sbmac_softc *sc,int onoff)
1851 {
1852         uint64_t reg;
1853
1854         if (sc->sbm_state != sbmac_state_on)
1855                 return;
1856
1857         if (onoff) {
1858                 reg = __raw_readq(sc->sbm_rxfilter);
1859                 reg |= M_MAC_ALLPKT_EN;
1860                 __raw_writeq(reg, sc->sbm_rxfilter);
1861         }
1862         else {
1863                 reg = __raw_readq(sc->sbm_rxfilter);
1864                 reg &= ~M_MAC_ALLPKT_EN;
1865                 __raw_writeq(reg, sc->sbm_rxfilter);
1866         }
1867 }
1868
1869 /**********************************************************************
1870  *  SBMAC_SETIPHDR_OFFSET(sc,onoff)
1871  *
1872  *  Set the iphdr offset as 15 assuming ethernet encapsulation
1873  *
1874  *  Input parameters:
1875  *         sc - softc
1876  *
1877  *  Return value:
1878  *         nothing
1879  ********************************************************************* */
1880
1881 static void sbmac_set_iphdr_offset(struct sbmac_softc *sc)
1882 {
1883         uint64_t reg;
1884
1885         /* Hard code the off set to 15 for now */
1886         reg = __raw_readq(sc->sbm_rxfilter);
1887         reg &= ~M_MAC_IPHDR_OFFSET | V_MAC_IPHDR_OFFSET(15);
1888         __raw_writeq(reg, sc->sbm_rxfilter);
1889
1890         /* BCM1250 pass1 didn't have hardware checksum.  Everything
1891            later does.  */
1892         if (soc_type == K_SYS_SOC_TYPE_BCM1250 && periph_rev < 2) {
1893                 sc->rx_hw_checksum = DISABLE;
1894         } else {
1895                 sc->rx_hw_checksum = ENABLE;
1896         }
1897 }
1898
1899
1900 /**********************************************************************
1901  *  SBMAC_ADDR2REG(ptr)
1902  *
1903  *  Convert six bytes into the 64-bit register value that
1904  *  we typically write into the SBMAC's address/mcast registers
1905  *
1906  *  Input parameters:
1907  *         ptr - pointer to 6 bytes
1908  *
1909  *  Return value:
1910  *         register value
1911  ********************************************************************* */
1912
1913 static uint64_t sbmac_addr2reg(unsigned char *ptr)
1914 {
1915         uint64_t reg = 0;
1916
1917         ptr += 6;
1918
1919         reg |= (uint64_t) *(--ptr);
1920         reg <<= 8;
1921         reg |= (uint64_t) *(--ptr);
1922         reg <<= 8;
1923         reg |= (uint64_t) *(--ptr);
1924         reg <<= 8;
1925         reg |= (uint64_t) *(--ptr);
1926         reg <<= 8;
1927         reg |= (uint64_t) *(--ptr);
1928         reg <<= 8;
1929         reg |= (uint64_t) *(--ptr);
1930
1931         return reg;
1932 }
1933
1934
1935 /**********************************************************************
1936  *  SBMAC_SET_SPEED(s,speed)
1937  *
1938  *  Configure LAN speed for the specified MAC.
1939  *  Warning: must be called when MAC is off!
1940  *
1941  *  Input parameters:
1942  *         s - sbmac structure
1943  *         speed - speed to set MAC to (see sbmac_speed_t enum)
1944  *
1945  *  Return value:
1946  *         1 if successful
1947  *      0 indicates invalid parameters
1948  ********************************************************************* */
1949
1950 static int sbmac_set_speed(struct sbmac_softc *s,sbmac_speed_t speed)
1951 {
1952         uint64_t cfg;
1953         uint64_t framecfg;
1954
1955         /*
1956          * Save new current values
1957          */
1958
1959         s->sbm_speed = speed;
1960
1961         if (s->sbm_state == sbmac_state_on)
1962                 return 0;       /* save for next restart */
1963
1964         /*
1965          * Read current register values
1966          */
1967
1968         cfg = __raw_readq(s->sbm_maccfg);
1969         framecfg = __raw_readq(s->sbm_framecfg);
1970
1971         /*
1972          * Mask out the stuff we want to change
1973          */
1974
1975         cfg &= ~(M_MAC_BURST_EN | M_MAC_SPEED_SEL);
1976         framecfg &= ~(M_MAC_IFG_RX | M_MAC_IFG_TX | M_MAC_IFG_THRSH |
1977                       M_MAC_SLOT_SIZE);
1978
1979         /*
1980          * Now add in the new bits
1981          */
1982
1983         switch (speed) {
1984         case sbmac_speed_10:
1985                 framecfg |= V_MAC_IFG_RX_10 |
1986                         V_MAC_IFG_TX_10 |
1987                         K_MAC_IFG_THRSH_10 |
1988                         V_MAC_SLOT_SIZE_10;
1989                 cfg |= V_MAC_SPEED_SEL_10MBPS;
1990                 break;
1991
1992         case sbmac_speed_100:
1993                 framecfg |= V_MAC_IFG_RX_100 |
1994                         V_MAC_IFG_TX_100 |
1995                         V_MAC_IFG_THRSH_100 |
1996                         V_MAC_SLOT_SIZE_100;
1997                 cfg |= V_MAC_SPEED_SEL_100MBPS ;
1998                 break;
1999
2000         case sbmac_speed_1000:
2001                 framecfg |= V_MAC_IFG_RX_1000 |
2002                         V_MAC_IFG_TX_1000 |
2003                         V_MAC_IFG_THRSH_1000 |
2004                         V_MAC_SLOT_SIZE_1000;
2005                 cfg |= V_MAC_SPEED_SEL_1000MBPS | M_MAC_BURST_EN;
2006                 break;
2007
2008         case sbmac_speed_auto:          /* XXX not implemented */
2009                 /* fall through */
2010         default:
2011                 return 0;
2012         }
2013
2014         /*
2015          * Send the bits back to the hardware
2016          */
2017
2018         __raw_writeq(framecfg, s->sbm_framecfg);
2019         __raw_writeq(cfg, s->sbm_maccfg);
2020
2021         return 1;
2022 }
2023
2024 /**********************************************************************
2025  *  SBMAC_SET_DUPLEX(s,duplex,fc)
2026  *
2027  *  Set Ethernet duplex and flow control options for this MAC
2028  *  Warning: must be called when MAC is off!
2029  *
2030  *  Input parameters:
2031  *         s - sbmac structure
2032  *         duplex - duplex setting (see sbmac_duplex_t)
2033  *         fc - flow control setting (see sbmac_fc_t)
2034  *
2035  *  Return value:
2036  *         1 if ok
2037  *         0 if an invalid parameter combination was specified
2038  ********************************************************************* */
2039
2040 static int sbmac_set_duplex(struct sbmac_softc *s,sbmac_duplex_t duplex,sbmac_fc_t fc)
2041 {
2042         uint64_t cfg;
2043
2044         /*
2045          * Save new current values
2046          */
2047
2048         s->sbm_duplex = duplex;
2049         s->sbm_fc = fc;
2050
2051         if (s->sbm_state == sbmac_state_on)
2052                 return 0;       /* save for next restart */
2053
2054         /*
2055          * Read current register values
2056          */
2057
2058         cfg = __raw_readq(s->sbm_maccfg);
2059
2060         /*
2061          * Mask off the stuff we're about to change
2062          */
2063
2064         cfg &= ~(M_MAC_FC_SEL | M_MAC_FC_CMD | M_MAC_HDX_EN);
2065
2066
2067         switch (duplex) {
2068         case sbmac_duplex_half:
2069                 switch (fc) {
2070                 case sbmac_fc_disabled:
2071                         cfg |= M_MAC_HDX_EN | V_MAC_FC_CMD_DISABLED;
2072                         break;
2073
2074                 case sbmac_fc_collision:
2075                         cfg |= M_MAC_HDX_EN | V_MAC_FC_CMD_ENABLED;
2076                         break;
2077
2078                 case sbmac_fc_carrier:
2079                         cfg |= M_MAC_HDX_EN | V_MAC_FC_CMD_ENAB_FALSECARR;
2080                         break;
2081
2082                 case sbmac_fc_auto:             /* XXX not implemented */
2083                         /* fall through */
2084                 case sbmac_fc_frame:            /* not valid in half duplex */
2085                 default:                        /* invalid selection */
2086                         return 0;
2087                 }
2088                 break;
2089
2090         case sbmac_duplex_full:
2091                 switch (fc) {
2092                 case sbmac_fc_disabled:
2093                         cfg |= V_MAC_FC_CMD_DISABLED;
2094                         break;
2095
2096                 case sbmac_fc_frame:
2097                         cfg |= V_MAC_FC_CMD_ENABLED;
2098                         break;
2099
2100                 case sbmac_fc_collision:        /* not valid in full duplex */
2101                 case sbmac_fc_carrier:          /* not valid in full duplex */
2102                 case sbmac_fc_auto:             /* XXX not implemented */
2103                         /* fall through */
2104                 default:
2105                         return 0;
2106                 }
2107                 break;
2108         case sbmac_duplex_auto:
2109                 /* XXX not implemented */
2110                 break;
2111         }
2112
2113         /*
2114          * Send the bits back to the hardware
2115          */
2116
2117         __raw_writeq(cfg, s->sbm_maccfg);
2118
2119         return 1;
2120 }
2121
2122
2123
2124
2125 /**********************************************************************
2126  *  SBMAC_INTR()
2127  *
2128  *  Interrupt handler for MAC interrupts
2129  *
2130  *  Input parameters:
2131  *         MAC structure
2132  *
2133  *  Return value:
2134  *         nothing
2135  ********************************************************************* */
2136 static irqreturn_t sbmac_intr(int irq,void *dev_instance)
2137 {
2138         struct net_device *dev = (struct net_device *) dev_instance;
2139         struct sbmac_softc *sc = netdev_priv(dev);
2140         uint64_t isr;
2141         int handled = 0;
2142
2143         /*
2144          * Read the ISR (this clears the bits in the real
2145          * register, except for counter addr)
2146          */
2147
2148         isr = __raw_readq(sc->sbm_isr) & ~M_MAC_COUNTER_ADDR;
2149
2150         if (isr == 0)
2151                 return IRQ_RETVAL(0);
2152         handled = 1;
2153
2154         /*
2155          * Transmits on channel 0
2156          */
2157
2158         if (isr & (M_MAC_INT_CHANNEL << S_MAC_TX_CH0))
2159                 sbdma_tx_process(sc,&(sc->sbm_txdma), 0);
2160
2161         if (isr & (M_MAC_INT_CHANNEL << S_MAC_RX_CH0)) {
2162                 if (netif_rx_schedule_prep(dev, &sc->napi)) {
2163                         __raw_writeq(0, sc->sbm_imr);
2164                         __netif_rx_schedule(dev, &sc->napi);
2165                         /* Depend on the exit from poll to reenable intr */
2166                 }
2167                 else {
2168                         /* may leave some packets behind */
2169                         sbdma_rx_process(sc,&(sc->sbm_rxdma),
2170                                          SBMAC_MAX_RXDESCR * 2, 0);
2171                 }
2172         }
2173         return IRQ_RETVAL(handled);
2174 }
2175
2176 /**********************************************************************
2177  *  SBMAC_START_TX(skb,dev)
2178  *
2179  *  Start output on the specified interface.  Basically, we
2180  *  queue as many buffers as we can until the ring fills up, or
2181  *  we run off the end of the queue, whichever comes first.
2182  *
2183  *  Input parameters:
2184  *
2185  *
2186  *  Return value:
2187  *         nothing
2188  ********************************************************************* */
2189 static int sbmac_start_tx(struct sk_buff *skb, struct net_device *dev)
2190 {
2191         struct sbmac_softc *sc = netdev_priv(dev);
2192
2193         /* lock eth irq */
2194         spin_lock_irq (&sc->sbm_lock);
2195
2196         /*
2197          * Put the buffer on the transmit ring.  If we
2198          * don't have room, stop the queue.
2199          */
2200
2201         if (sbdma_add_txbuffer(&(sc->sbm_txdma),skb)) {
2202                 /* XXX save skb that we could not send */
2203                 netif_stop_queue(dev);
2204                 spin_unlock_irq(&sc->sbm_lock);
2205
2206                 return 1;
2207         }
2208
2209         dev->trans_start = jiffies;
2210
2211         spin_unlock_irq (&sc->sbm_lock);
2212
2213         return 0;
2214 }
2215
2216 /**********************************************************************
2217  *  SBMAC_SETMULTI(sc)
2218  *
2219  *  Reprogram the multicast table into the hardware, given
2220  *  the list of multicasts associated with the interface
2221  *  structure.
2222  *
2223  *  Input parameters:
2224  *         sc - softc
2225  *
2226  *  Return value:
2227  *         nothing
2228  ********************************************************************* */
2229
2230 static void sbmac_setmulti(struct sbmac_softc *sc)
2231 {
2232         uint64_t reg;
2233         volatile void __iomem *port;
2234         int idx;
2235         struct dev_mc_list *mclist;
2236         struct net_device *dev = sc->sbm_dev;
2237
2238         /*
2239          * Clear out entire multicast table.  We do this by nuking
2240          * the entire hash table and all the direct matches except
2241          * the first one, which is used for our station address
2242          */
2243
2244         for (idx = 1; idx < MAC_ADDR_COUNT; idx++) {
2245                 port = sc->sbm_base + R_MAC_ADDR_BASE+(idx*sizeof(uint64_t));
2246                 __raw_writeq(0, port);
2247         }
2248
2249         for (idx = 0; idx < MAC_HASH_COUNT; idx++) {
2250                 port = sc->sbm_base + R_MAC_HASH_BASE+(idx*sizeof(uint64_t));
2251                 __raw_writeq(0, port);
2252         }
2253
2254         /*
2255          * Clear the filter to say we don't want any multicasts.
2256          */
2257
2258         reg = __raw_readq(sc->sbm_rxfilter);
2259         reg &= ~(M_MAC_MCAST_INV | M_MAC_MCAST_EN);
2260         __raw_writeq(reg, sc->sbm_rxfilter);
2261
2262         if (dev->flags & IFF_ALLMULTI) {
2263                 /*
2264                  * Enable ALL multicasts.  Do this by inverting the
2265                  * multicast enable bit.
2266                  */
2267                 reg = __raw_readq(sc->sbm_rxfilter);
2268                 reg |= (M_MAC_MCAST_INV | M_MAC_MCAST_EN);
2269                 __raw_writeq(reg, sc->sbm_rxfilter);
2270                 return;
2271         }
2272
2273
2274         /*
2275          * Progam new multicast entries.  For now, only use the
2276          * perfect filter.  In the future we'll need to use the
2277          * hash filter if the perfect filter overflows
2278          */
2279
2280         /* XXX only using perfect filter for now, need to use hash
2281          * XXX if the table overflows */
2282
2283         idx = 1;                /* skip station address */
2284         mclist = dev->mc_list;
2285         while (mclist && (idx < MAC_ADDR_COUNT)) {
2286                 reg = sbmac_addr2reg(mclist->dmi_addr);
2287                 port = sc->sbm_base + R_MAC_ADDR_BASE+(idx * sizeof(uint64_t));
2288                 __raw_writeq(reg, port);
2289                 idx++;
2290                 mclist = mclist->next;
2291         }
2292
2293         /*
2294          * Enable the "accept multicast bits" if we programmed at least one
2295          * multicast.
2296          */
2297
2298         if (idx > 1) {
2299                 reg = __raw_readq(sc->sbm_rxfilter);
2300                 reg |= M_MAC_MCAST_EN;
2301                 __raw_writeq(reg, sc->sbm_rxfilter);
2302         }
2303 }
2304
2305 #if defined(SBMAC_ETH0_HWADDR) || defined(SBMAC_ETH1_HWADDR) || defined(SBMAC_ETH2_HWADDR) || defined(SBMAC_ETH3_HWADDR)
2306 /**********************************************************************
2307  *  SBMAC_PARSE_XDIGIT(str)
2308  *
2309  *  Parse a hex digit, returning its value
2310  *
2311  *  Input parameters:
2312  *         str - character
2313  *
2314  *  Return value:
2315  *         hex value, or -1 if invalid
2316  ********************************************************************* */
2317
2318 static int sbmac_parse_xdigit(char str)
2319 {
2320         int digit;
2321
2322         if ((str >= '0') && (str <= '9'))
2323                 digit = str - '0';
2324         else if ((str >= 'a') && (str <= 'f'))
2325                 digit = str - 'a' + 10;
2326         else if ((str >= 'A') && (str <= 'F'))
2327                 digit = str - 'A' + 10;
2328         else
2329                 return -1;
2330
2331         return digit;
2332 }
2333
2334 /**********************************************************************
2335  *  SBMAC_PARSE_HWADDR(str,hwaddr)
2336  *
2337  *  Convert a string in the form xx:xx:xx:xx:xx:xx into a 6-byte
2338  *  Ethernet address.
2339  *
2340  *  Input parameters:
2341  *         str - string
2342  *         hwaddr - pointer to hardware address
2343  *
2344  *  Return value:
2345  *         0 if ok, else -1
2346  ********************************************************************* */
2347
2348 static int sbmac_parse_hwaddr(char *str, unsigned char *hwaddr)
2349 {
2350         int digit1,digit2;
2351         int idx = 6;
2352
2353         while (*str && (idx > 0)) {
2354                 digit1 = sbmac_parse_xdigit(*str);
2355                 if (digit1 < 0)
2356                         return -1;
2357                 str++;
2358                 if (!*str)
2359                         return -1;
2360
2361                 if ((*str == ':') || (*str == '-')) {
2362                         digit2 = digit1;
2363                         digit1 = 0;
2364                 }
2365                 else {
2366                         digit2 = sbmac_parse_xdigit(*str);
2367                         if (digit2 < 0)
2368                                 return -1;
2369                         str++;
2370                 }
2371
2372                 *hwaddr++ = (digit1 << 4) | digit2;
2373                 idx--;
2374
2375                 if (*str == '-')
2376                         str++;
2377                 if (*str == ':')
2378                         str++;
2379         }
2380         return 0;
2381 }
2382 #endif
2383
2384 static int sb1250_change_mtu(struct net_device *_dev, int new_mtu)
2385 {
2386         if (new_mtu >  ENET_PACKET_SIZE)
2387                 return -EINVAL;
2388         _dev->mtu = new_mtu;
2389         printk(KERN_INFO "changing the mtu to %d\n", new_mtu);
2390         return 0;
2391 }
2392
2393 /**********************************************************************
2394  *  SBMAC_INIT(dev)
2395  *
2396  *  Attach routine - init hardware and hook ourselves into linux
2397  *
2398  *  Input parameters:
2399  *         dev - net_device structure
2400  *
2401  *  Return value:
2402  *         status
2403  ********************************************************************* */
2404
2405 static int sbmac_init(struct net_device *dev, int idx)
2406 {
2407         struct sbmac_softc *sc;
2408         unsigned char *eaddr;
2409         uint64_t ea_reg;
2410         int i;
2411         int err;
2412
2413         sc = netdev_priv(dev);
2414
2415         /* Determine controller base address */
2416
2417         sc->sbm_base = IOADDR(dev->base_addr);
2418         sc->sbm_dev = dev;
2419         sc->sbe_idx = idx;
2420
2421         eaddr = sc->sbm_hwaddr;
2422
2423         /*
2424          * Read the ethernet address.  The firwmare left this programmed
2425          * for us in the ethernet address register for each mac.
2426          */
2427
2428         ea_reg = __raw_readq(sc->sbm_base + R_MAC_ETHERNET_ADDR);
2429         __raw_writeq(0, sc->sbm_base + R_MAC_ETHERNET_ADDR);
2430         for (i = 0; i < 6; i++) {
2431                 eaddr[i] = (uint8_t) (ea_reg & 0xFF);
2432                 ea_reg >>= 8;
2433         }
2434
2435         for (i = 0; i < 6; i++) {
2436                 dev->dev_addr[i] = eaddr[i];
2437         }
2438
2439
2440         /*
2441          * Init packet size
2442          */
2443
2444         sc->sbm_buffersize = ENET_PACKET_SIZE + SMP_CACHE_BYTES * 2 + ETHER_ALIGN;
2445
2446         /*
2447          * Initialize context (get pointers to registers and stuff), then
2448          * allocate the memory for the descriptor tables.
2449          */
2450
2451         sbmac_initctx(sc);
2452
2453         /*
2454          * Set up Linux device callins
2455          */
2456
2457         spin_lock_init(&(sc->sbm_lock));
2458
2459         dev->open               = sbmac_open;
2460         dev->hard_start_xmit    = sbmac_start_tx;
2461         dev->stop               = sbmac_close;
2462         dev->get_stats          = sbmac_get_stats;
2463         dev->set_multicast_list = sbmac_set_rx_mode;
2464         dev->do_ioctl           = sbmac_mii_ioctl;
2465         dev->tx_timeout         = sbmac_tx_timeout;
2466         dev->watchdog_timeo     = TX_TIMEOUT;
2467
2468         netif_napi_add(dev, &sc->napi, sbmac_poll, 16);
2469
2470         dev->change_mtu         = sb1250_change_mtu;
2471 #ifdef CONFIG_NET_POLL_CONTROLLER
2472         dev->poll_controller = sbmac_netpoll;
2473 #endif
2474
2475         /* This is needed for PASS2 for Rx H/W checksum feature */
2476         sbmac_set_iphdr_offset(sc);
2477
2478         err = register_netdev(dev);
2479         if (err)
2480                 goto out_uninit;
2481
2482         if (sc->rx_hw_checksum == ENABLE) {
2483                 printk(KERN_INFO "%s: enabling TCP rcv checksum\n",
2484                         sc->sbm_dev->name);
2485         }
2486
2487         /*
2488          * Display Ethernet address (this is called during the config
2489          * process so we need to finish off the config message that
2490          * was being displayed)
2491          */
2492         printk(KERN_INFO
2493                "%s: SiByte Ethernet at 0x%08lX, address: %02X:%02X:%02X:%02X:%02X:%02X\n",
2494                dev->name, dev->base_addr,
2495                eaddr[0],eaddr[1],eaddr[2],eaddr[3],eaddr[4],eaddr[5]);
2496
2497
2498         return 0;
2499
2500 out_uninit:
2501         sbmac_uninitctx(sc);
2502
2503         return err;
2504 }
2505
2506
2507 static int sbmac_open(struct net_device *dev)
2508 {
2509         struct sbmac_softc *sc = netdev_priv(dev);
2510
2511         if (debug > 1) {
2512                 printk(KERN_DEBUG "%s: sbmac_open() irq %d.\n", dev->name, dev->irq);
2513         }
2514
2515         /*
2516          * map/route interrupt (clear status first, in case something
2517          * weird is pending; we haven't initialized the mac registers
2518          * yet)
2519          */
2520
2521         __raw_readq(sc->sbm_isr);
2522         if (request_irq(dev->irq, &sbmac_intr, IRQF_SHARED, dev->name, dev))
2523                 return -EBUSY;
2524
2525         /*
2526          * Probe phy address
2527          */
2528
2529         if(sbmac_mii_probe(dev) == -1) {
2530                 printk("%s: failed to probe PHY.\n", dev->name);
2531                 return -EINVAL;
2532         }
2533
2534         napi_enable(&sc->napi);
2535
2536         /*
2537          * Configure default speed
2538          */
2539
2540         sbmac_mii_poll(sc,noisy_mii);
2541
2542         /*
2543          * Turn on the channel
2544          */
2545
2546         sbmac_set_channel_state(sc,sbmac_state_on);
2547
2548         /*
2549          * XXX Station address is in dev->dev_addr
2550          */
2551
2552         if (dev->if_port == 0)
2553                 dev->if_port = 0;
2554
2555         netif_start_queue(dev);
2556
2557         sbmac_set_rx_mode(dev);
2558
2559         /* Set the timer to check for link beat. */
2560         init_timer(&sc->sbm_timer);
2561         sc->sbm_timer.expires = jiffies + 2 * HZ/100;
2562         sc->sbm_timer.data = (unsigned long)dev;
2563         sc->sbm_timer.function = &sbmac_timer;
2564         add_timer(&sc->sbm_timer);
2565
2566         return 0;
2567 }
2568
2569 static int sbmac_mii_probe(struct net_device *dev)
2570 {
2571         int i;
2572         struct sbmac_softc *s = netdev_priv(dev);
2573         u16 bmsr, id1, id2;
2574         u32 vendor, device;
2575
2576         for (i=1; i<31; i++) {
2577         bmsr = sbmac_mii_read(s, i, MII_BMSR);
2578                 if (bmsr != 0) {
2579                         s->sbm_phys[0] = i;
2580                         id1 = sbmac_mii_read(s, i, MII_PHYIDR1);
2581                         id2 = sbmac_mii_read(s, i, MII_PHYIDR2);
2582                         vendor = ((u32)id1 << 6) | ((id2 >> 10) & 0x3f);
2583                         device = (id2 >> 4) & 0x3f;
2584
2585                         printk(KERN_INFO "%s: found phy %d, vendor %06x part %02x\n",
2586                                 dev->name, i, vendor, device);
2587                         return i;
2588                 }
2589         }
2590         return -1;
2591 }
2592
2593
2594 static int sbmac_mii_poll(struct sbmac_softc *s,int noisy)
2595 {
2596     int bmsr,bmcr,k1stsr,anlpar;
2597     int chg;
2598     char buffer[100];
2599     char *p = buffer;
2600
2601     /* Read the mode status and mode control registers. */
2602     bmsr = sbmac_mii_read(s,s->sbm_phys[0],MII_BMSR);
2603     bmcr = sbmac_mii_read(s,s->sbm_phys[0],MII_BMCR);
2604
2605     /* get the link partner status */
2606     anlpar = sbmac_mii_read(s,s->sbm_phys[0],MII_ANLPAR);
2607
2608     /* if supported, read the 1000baseT register */
2609     if (bmsr & BMSR_1000BT_XSR) {
2610         k1stsr = sbmac_mii_read(s,s->sbm_phys[0],MII_K1STSR);
2611         }
2612     else {
2613         k1stsr = 0;
2614         }
2615
2616     chg = 0;
2617
2618     if ((bmsr & BMSR_LINKSTAT) == 0) {
2619         /*
2620          * If link status is down, clear out old info so that when
2621          * it comes back up it will force us to reconfigure speed
2622          */
2623         s->sbm_phy_oldbmsr = 0;
2624         s->sbm_phy_oldanlpar = 0;
2625         s->sbm_phy_oldk1stsr = 0;
2626         return 0;
2627         }
2628
2629     if ((s->sbm_phy_oldbmsr != bmsr) ||
2630         (s->sbm_phy_oldanlpar != anlpar) ||
2631         (s->sbm_phy_oldk1stsr != k1stsr)) {
2632         if (debug > 1) {
2633             printk(KERN_DEBUG "%s: bmsr:%x/%x anlpar:%x/%x  k1stsr:%x/%x\n",
2634                s->sbm_dev->name,
2635                s->sbm_phy_oldbmsr,bmsr,
2636                s->sbm_phy_oldanlpar,anlpar,
2637                s->sbm_phy_oldk1stsr,k1stsr);
2638             }
2639         s->sbm_phy_oldbmsr = bmsr;
2640         s->sbm_phy_oldanlpar = anlpar;
2641         s->sbm_phy_oldk1stsr = k1stsr;
2642         chg = 1;
2643         }
2644
2645     if (chg == 0)
2646             return 0;
2647
2648     p += sprintf(p,"Link speed: ");
2649
2650     if (k1stsr & K1STSR_LP1KFD) {
2651         s->sbm_speed = sbmac_speed_1000;
2652         s->sbm_duplex = sbmac_duplex_full;
2653         s->sbm_fc = sbmac_fc_frame;
2654         p += sprintf(p,"1000BaseT FDX");
2655         }
2656     else if (k1stsr & K1STSR_LP1KHD) {
2657         s->sbm_speed = sbmac_speed_1000;
2658         s->sbm_duplex = sbmac_duplex_half;
2659         s->sbm_fc = sbmac_fc_disabled;
2660         p += sprintf(p,"1000BaseT HDX");
2661         }
2662     else if (anlpar & ANLPAR_TXFD) {
2663         s->sbm_speed = sbmac_speed_100;
2664         s->sbm_duplex = sbmac_duplex_full;
2665         s->sbm_fc = (anlpar & ANLPAR_PAUSE) ? sbmac_fc_frame : sbmac_fc_disabled;
2666         p += sprintf(p,"100BaseT FDX");
2667         }
2668     else if (anlpar & ANLPAR_TXHD) {
2669         s->sbm_speed = sbmac_speed_100;
2670         s->sbm_duplex = sbmac_duplex_half;
2671         s->sbm_fc = sbmac_fc_disabled;
2672         p += sprintf(p,"100BaseT HDX");
2673         }
2674     else if (anlpar & ANLPAR_10FD) {
2675         s->sbm_speed = sbmac_speed_10;
2676         s->sbm_duplex = sbmac_duplex_full;
2677         s->sbm_fc = sbmac_fc_frame;
2678         p += sprintf(p,"10BaseT FDX");
2679         }
2680     else if (anlpar & ANLPAR_10HD) {
2681         s->sbm_speed = sbmac_speed_10;
2682         s->sbm_duplex = sbmac_duplex_half;
2683         s->sbm_fc = sbmac_fc_collision;
2684         p += sprintf(p,"10BaseT HDX");
2685         }
2686     else {
2687         p += sprintf(p,"Unknown");
2688         }
2689
2690     if (noisy) {
2691             printk(KERN_INFO "%s: %s\n",s->sbm_dev->name,buffer);
2692             }
2693
2694     return 1;
2695 }
2696
2697
2698 static void sbmac_timer(unsigned long data)
2699 {
2700         struct net_device *dev = (struct net_device *)data;
2701         struct sbmac_softc *sc = netdev_priv(dev);
2702         int next_tick = HZ;
2703         int mii_status;
2704
2705         spin_lock_irq (&sc->sbm_lock);
2706
2707         /* make IFF_RUNNING follow the MII status bit "Link established" */
2708         mii_status = sbmac_mii_read(sc, sc->sbm_phys[0], MII_BMSR);
2709
2710         if ( (mii_status & BMSR_LINKSTAT) != (sc->sbm_phy_oldlinkstat) ) {
2711                 sc->sbm_phy_oldlinkstat = mii_status & BMSR_LINKSTAT;
2712                 if (mii_status & BMSR_LINKSTAT) {
2713                         netif_carrier_on(dev);
2714                 }
2715                 else {
2716                         netif_carrier_off(dev);
2717                 }
2718         }
2719
2720         /*
2721          * Poll the PHY to see what speed we should be running at
2722          */
2723
2724         if (sbmac_mii_poll(sc,noisy_mii)) {
2725                 if (sc->sbm_state != sbmac_state_off) {
2726                         /*
2727                          * something changed, restart the channel
2728                          */
2729                         if (debug > 1) {
2730                                 printk("%s: restarting channel because speed changed\n",
2731                                        sc->sbm_dev->name);
2732                         }
2733                         sbmac_channel_stop(sc);
2734                         sbmac_channel_start(sc);
2735                 }
2736         }
2737
2738         spin_unlock_irq (&sc->sbm_lock);
2739
2740         sc->sbm_timer.expires = jiffies + next_tick;
2741         add_timer(&sc->sbm_timer);
2742 }
2743
2744
2745 static void sbmac_tx_timeout (struct net_device *dev)
2746 {
2747         struct sbmac_softc *sc = netdev_priv(dev);
2748
2749         spin_lock_irq (&sc->sbm_lock);
2750
2751
2752         dev->trans_start = jiffies;
2753         sc->sbm_stats.tx_errors++;
2754
2755         spin_unlock_irq (&sc->sbm_lock);
2756
2757         printk (KERN_WARNING "%s: Transmit timed out\n",dev->name);
2758 }
2759
2760
2761
2762
2763 static struct net_device_stats *sbmac_get_stats(struct net_device *dev)
2764 {
2765         struct sbmac_softc *sc = netdev_priv(dev);
2766         unsigned long flags;
2767
2768         spin_lock_irqsave(&sc->sbm_lock, flags);
2769
2770         /* XXX update other stats here */
2771
2772         spin_unlock_irqrestore(&sc->sbm_lock, flags);
2773
2774         return &sc->sbm_stats;
2775 }
2776
2777
2778
2779 static void sbmac_set_rx_mode(struct net_device *dev)
2780 {
2781         unsigned long flags;
2782         struct sbmac_softc *sc = netdev_priv(dev);
2783
2784         spin_lock_irqsave(&sc->sbm_lock, flags);
2785         if ((dev->flags ^ sc->sbm_devflags) & IFF_PROMISC) {
2786                 /*
2787                  * Promiscuous changed.
2788                  */
2789
2790                 if (dev->flags & IFF_PROMISC) {
2791                         sbmac_promiscuous_mode(sc,1);
2792                 }
2793                 else {
2794                         sbmac_promiscuous_mode(sc,0);
2795                 }
2796         }
2797         spin_unlock_irqrestore(&sc->sbm_lock, flags);
2798
2799         /*
2800          * Program the multicasts.  Do this every time.
2801          */
2802
2803         sbmac_setmulti(sc);
2804
2805 }
2806
2807 static int sbmac_mii_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
2808 {
2809         struct sbmac_softc *sc = netdev_priv(dev);
2810         u16 *data = (u16 *)&rq->ifr_ifru;
2811         unsigned long flags;
2812         int retval;
2813
2814         spin_lock_irqsave(&sc->sbm_lock, flags);
2815         retval = 0;
2816
2817         switch(cmd) {
2818         case SIOCDEVPRIVATE:            /* Get the address of the PHY in use. */
2819                 data[0] = sc->sbm_phys[0] & 0x1f;
2820                 /* Fall Through */
2821         case SIOCDEVPRIVATE+1:          /* Read the specified MII register. */
2822                 data[3] = sbmac_mii_read(sc, data[0] & 0x1f, data[1] & 0x1f);
2823                 break;
2824         case SIOCDEVPRIVATE+2:          /* Write the specified MII register */
2825                 if (!capable(CAP_NET_ADMIN)) {
2826                         retval = -EPERM;
2827                         break;
2828                 }
2829                 if (debug > 1) {
2830                     printk(KERN_DEBUG "%s: sbmac_mii_ioctl: write %02X %02X %02X\n",dev->name,
2831                        data[0],data[1],data[2]);
2832                     }
2833                 sbmac_mii_write(sc, data[0] & 0x1f, data[1] & 0x1f, data[2]);
2834                 break;
2835         default:
2836                 retval = -EOPNOTSUPP;
2837         }
2838
2839         spin_unlock_irqrestore(&sc->sbm_lock, flags);
2840         return retval;
2841 }
2842
2843 static int sbmac_close(struct net_device *dev)
2844 {
2845         struct sbmac_softc *sc = netdev_priv(dev);
2846         unsigned long flags;
2847         int irq;
2848
2849         napi_disable(&sc->napi);
2850
2851         sbmac_set_channel_state(sc,sbmac_state_off);
2852
2853         del_timer_sync(&sc->sbm_timer);
2854
2855         spin_lock_irqsave(&sc->sbm_lock, flags);
2856
2857         netif_stop_queue(dev);
2858
2859         if (debug > 1) {
2860                 printk(KERN_DEBUG "%s: Shutting down ethercard\n",dev->name);
2861         }
2862
2863         spin_unlock_irqrestore(&sc->sbm_lock, flags);
2864
2865         irq = dev->irq;
2866         synchronize_irq(irq);
2867         free_irq(irq, dev);
2868
2869         sbdma_emptyring(&(sc->sbm_txdma));
2870         sbdma_emptyring(&(sc->sbm_rxdma));
2871
2872         return 0;
2873 }
2874
2875 static int sbmac_poll(struct napi_struct *napi, int budget)
2876 {
2877         struct sbmac_softc *sc = container_of(napi, struct sbmac_softc, napi);
2878         struct net_device *dev = sc->sbm_dev;
2879         int work_done;
2880
2881         work_done = sbdma_rx_process(sc, &(sc->sbm_rxdma), budget, 1);
2882         sbdma_tx_process(sc, &(sc->sbm_txdma), 1);
2883
2884         if (work_done < budget) {
2885                 netif_rx_complete(dev, napi);
2886
2887 #ifdef CONFIG_SBMAC_COALESCE
2888                 __raw_writeq(((M_MAC_INT_EOP_COUNT | M_MAC_INT_EOP_TIMER) << S_MAC_TX_CH0) |
2889                              ((M_MAC_INT_EOP_COUNT | M_MAC_INT_EOP_TIMER) << S_MAC_RX_CH0),
2890                              sc->sbm_imr);
2891 #else
2892                 __raw_writeq((M_MAC_INT_CHANNEL << S_MAC_TX_CH0) |
2893                              (M_MAC_INT_CHANNEL << S_MAC_RX_CH0), sc->sbm_imr);
2894 #endif
2895         }
2896
2897         return work_done;
2898 }
2899
2900 #if defined(SBMAC_ETH0_HWADDR) || defined(SBMAC_ETH1_HWADDR) || defined(SBMAC_ETH2_HWADDR) || defined(SBMAC_ETH3_HWADDR)
2901 static void
2902 sbmac_setup_hwaddr(int chan,char *addr)
2903 {
2904         uint8_t eaddr[6];
2905         uint64_t val;
2906         unsigned long port;
2907
2908         port = A_MAC_CHANNEL_BASE(chan);
2909         sbmac_parse_hwaddr(addr,eaddr);
2910         val = sbmac_addr2reg(eaddr);
2911         __raw_writeq(val, IOADDR(port+R_MAC_ETHERNET_ADDR));
2912         val = __raw_readq(IOADDR(port+R_MAC_ETHERNET_ADDR));
2913 }
2914 #endif
2915
2916 static struct net_device *dev_sbmac[MAX_UNITS];
2917
2918 static int __init
2919 sbmac_init_module(void)
2920 {
2921         int idx;
2922         struct net_device *dev;
2923         unsigned long port;
2924         int chip_max_units;
2925
2926         /* Set the number of available units based on the SOC type.  */
2927         switch (soc_type) {
2928         case K_SYS_SOC_TYPE_BCM1250:
2929         case K_SYS_SOC_TYPE_BCM1250_ALT:
2930                 chip_max_units = 3;
2931                 break;
2932         case K_SYS_SOC_TYPE_BCM1120:
2933         case K_SYS_SOC_TYPE_BCM1125:
2934         case K_SYS_SOC_TYPE_BCM1125H:
2935         case K_SYS_SOC_TYPE_BCM1250_ALT2: /* Hybrid */
2936                 chip_max_units = 2;
2937                 break;
2938         case K_SYS_SOC_TYPE_BCM1x55:
2939         case K_SYS_SOC_TYPE_BCM1x80:
2940                 chip_max_units = 4;
2941                 break;
2942         default:
2943                 chip_max_units = 0;
2944                 break;
2945         }
2946         if (chip_max_units > MAX_UNITS)
2947                 chip_max_units = MAX_UNITS;
2948
2949         /*
2950          * For bringup when not using the firmware, we can pre-fill
2951          * the MAC addresses using the environment variables
2952          * specified in this file (or maybe from the config file?)
2953          */
2954 #ifdef SBMAC_ETH0_HWADDR
2955         if (chip_max_units > 0)
2956           sbmac_setup_hwaddr(0,SBMAC_ETH0_HWADDR);
2957 #endif
2958 #ifdef SBMAC_ETH1_HWADDR
2959         if (chip_max_units > 1)
2960           sbmac_setup_hwaddr(1,SBMAC_ETH1_HWADDR);
2961 #endif
2962 #ifdef SBMAC_ETH2_HWADDR
2963         if (chip_max_units > 2)
2964           sbmac_setup_hwaddr(2,SBMAC_ETH2_HWADDR);
2965 #endif
2966 #ifdef SBMAC_ETH3_HWADDR
2967         if (chip_max_units > 3)
2968           sbmac_setup_hwaddr(3,SBMAC_ETH3_HWADDR);
2969 #endif
2970
2971         /*
2972          * Walk through the Ethernet controllers and find
2973          * those who have their MAC addresses set.
2974          */
2975         for (idx = 0; idx < chip_max_units; idx++) {
2976
2977                 /*
2978                  * This is the base address of the MAC.
2979                  */
2980
2981                 port = A_MAC_CHANNEL_BASE(idx);
2982
2983                 /*
2984                  * The R_MAC_ETHERNET_ADDR register will be set to some nonzero
2985                  * value for us by the firmware if we are going to use this MAC.
2986                  * If we find a zero, skip this MAC.
2987                  */
2988
2989                 sbmac_orig_hwaddr[idx] = __raw_readq(IOADDR(port+R_MAC_ETHERNET_ADDR));
2990                 if (sbmac_orig_hwaddr[idx] == 0) {
2991                         printk(KERN_DEBUG "sbmac: not configuring MAC at "
2992                                "%lx\n", port);
2993                     continue;
2994                 }
2995
2996                 /*
2997                  * Okay, cool.  Initialize this MAC.
2998                  */
2999
3000                 dev = alloc_etherdev(sizeof(struct sbmac_softc));
3001                 if (!dev)
3002                         return -ENOMEM;
3003
3004                 printk(KERN_DEBUG "sbmac: configuring MAC at %lx\n", port);
3005
3006                 dev->irq = UNIT_INT(idx);
3007                 dev->base_addr = port;
3008                 dev->mem_end = 0;
3009                 if (sbmac_init(dev, idx)) {
3010                         port = A_MAC_CHANNEL_BASE(idx);
3011                         __raw_writeq(sbmac_orig_hwaddr[idx], IOADDR(port+R_MAC_ETHERNET_ADDR));
3012                         free_netdev(dev);
3013                         continue;
3014                 }
3015                 dev_sbmac[idx] = dev;
3016         }
3017         return 0;
3018 }
3019
3020
3021 static void __exit
3022 sbmac_cleanup_module(void)
3023 {
3024         struct net_device *dev;
3025         int idx;
3026
3027         for (idx = 0; idx < MAX_UNITS; idx++) {
3028                 struct sbmac_softc *sc;
3029                 dev = dev_sbmac[idx];
3030                 if (!dev)
3031                         continue;
3032
3033                 sc = netdev_priv(dev);
3034                 unregister_netdev(dev);
3035                 sbmac_uninitctx(sc);
3036                 free_netdev(dev);
3037         }
3038 }
3039
3040 module_init(sbmac_init_module);
3041 module_exit(sbmac_cleanup_module);