drivers/usb/serial/io_edgeport.c

   1 /*
   2  * Edgeport USB Serial Converter driver
   3  *
   4  * Copyright (C) 2000 Inside Out Networks, All rights reserved.
   5  * Copyright (C) 2001-2002 Greg Kroah-Hartman <greg@kroah.com>
   6  *
   7  *      This program is free software; you can redistribute it and/or modify
   8  *      it under the terms of the GNU General Public License as published by
   9  *      the Free Software Foundation; either version 2 of the License, or
  10  *      (at your option) any later version.
  11  *
  12  * Supports the following devices:
  13  *      Edgeport/4
  14  *      Edgeport/4t
  15  *      Edgeport/2
  16  *      Edgeport/4i
  17  *      Edgeport/2i
  18  *      Edgeport/421
  19  *      Edgeport/21
  20  *      Rapidport/4
  21  *      Edgeport/8
  22  *      Edgeport/2D8
  23  *      Edgeport/4D8
  24  *      Edgeport/8i
  25  *
  26  * For questions or problems with this driver, contact Inside Out
  27  * Networks technical support, or Peter Berger <pberger@brimson.com>,
  28  * or Al Borchers <alborchers@steinerpoint.com>.
  29  *
  30  */
  31
  32 #include <linux/kernel.h>
  33 #include <linux/jiffies.h>
  34 #include <linux/errno.h>
  35 #include <linux/init.h>
  36 #include <linux/slab.h>
  37 #include <linux/tty.h>
  38 #include <linux/tty_driver.h>
  39 #include <linux/tty_flip.h>
  40 #include <linux/module.h>
  41 #include <linux/spinlock.h>
  42 #include <linux/serial.h>
  43 #include <linux/ioctl.h>
  44 #include <linux/wait.h>
  45 #include <linux/firmware.h>
  46 #include <linux/ihex.h>
  47 #include <linux/uaccess.h>
  48 #include <linux/usb.h>
  49 #include <linux/usb/serial.h>
  50 #include "io_edgeport.h"
  51 #include "io_ionsp.h"           /* info for the iosp messages */
  52 #include "io_16654.h"           /* 16654 UART defines */
  53
  54 /*
  55  * Version Information
  56  */
  57 #define DRIVER_VERSION "v2.7"
  58 #define DRIVER_AUTHOR "Greg Kroah-Hartman <greg@kroah.com> and David Iacovelli"
  59 #define DRIVER_DESC "Edgeport USB Serial Driver"
  60
  61 #define MAX_NAME_LEN            64
  62
  63 #define CHASE_TIMEOUT           (5*HZ)          /* 5 seconds */
  64 #define OPEN_TIMEOUT            (5*HZ)          /* 5 seconds */
  65 #define COMMAND_TIMEOUT         (5*HZ)          /* 5 seconds */
  66
  67 /* receive port state */
  68 enum RXSTATE {
  69         EXPECT_HDR1 = 0,    /* Expect header byte 1 */
  70         EXPECT_HDR2 = 1,    /* Expect header byte 2 */
  71         EXPECT_DATA = 2,    /* Expect 'RxBytesRemaining' data */
  72         EXPECT_HDR3 = 3,    /* Expect header byte 3 (for status hdrs only) */
  73 };
  74
  75
  76 /* Transmit Fifo
  77  * This Transmit queue is an extension of the edgeport Rx buffer.
  78  * The maximum amount of data buffered in both the edgeport
  79  * Rx buffer (maxTxCredits) and this buffer will never exceed maxTxCredits.
  80  */
  81 struct TxFifo {
  82         unsigned int    head;   /* index to head pointer (write) */
  83         unsigned int    tail;   /* index to tail pointer (read)  */
  84         unsigned int    count;  /* Bytes in queue */
  85         unsigned int    size;   /* Max size of queue (equal to Max number of TxCredits) */
  86         unsigned char   *fifo;  /* allocated Buffer */
  87 };
  88
  89 /* This structure holds all of the local port information */
  90 struct edgeport_port {
  91         __u16                   txCredits;              /* our current credits for this port */
  92         __u16                   maxTxCredits;           /* the max size of the port */
  93
  94         struct TxFifo           txfifo;                 /* transmit fifo -- size will be maxTxCredits */
  95         struct urb              *write_urb;             /* write URB for this port */
  96         bool                    write_in_progress;      /* 'true' while a write URB is outstanding */
  97         spinlock_t              ep_lock;
  98
  99         __u8                    shadowLCR;              /* last LCR value received */
 100         __u8                    shadowMCR;              /* last MCR value received */
 101         __u8                    shadowMSR;              /* last MSR value received */
 102         __u8                    shadowLSR;              /* last LSR value received */
 103         __u8                    shadowXonChar;          /* last value set as XON char in Edgeport */
 104         __u8                    shadowXoffChar;         /* last value set as XOFF char in Edgeport */
 105         __u8                    validDataMask;
 106         __u32                   baudRate;
 107
 108         bool                    open;
 109         bool                    openPending;
 110         bool                    commandPending;
 111         bool                    closePending;
 112         bool                    chaseResponsePending;
 113
 114         wait_queue_head_t       wait_chase;             /* for handling sleeping while waiting for chase to finish */
 115         wait_queue_head_t       wait_open;              /* for handling sleeping while waiting for open to finish */
 116         wait_queue_head_t       wait_command;           /* for handling sleeping while waiting for command to finish */
 117         wait_queue_head_t       delta_msr_wait;         /* for handling sleeping while waiting for msr change to happen */
 118
 119         struct async_icount     icount;
 120         struct usb_serial_port  *port;                  /* loop back to the owner of this object */
 121 };
 122
 123
 124 /* This structure holds all of the individual device information */
 125 struct edgeport_serial {
 126         char                    name[MAX_NAME_LEN+2];           /* string name of this device */
 127
 128         struct edge_manuf_descriptor    manuf_descriptor;       /* the manufacturer descriptor */
 129         struct edge_boot_descriptor     boot_descriptor;        /* the boot firmware descriptor */
 130         struct edgeport_product_info    product_info;           /* Product Info */
 131         struct edge_compatibility_descriptor epic_descriptor;   /* Edgeport compatible descriptor */
 132         int                     is_epic;                        /* flag if EPiC device or not */
 133
 134         __u8                    interrupt_in_endpoint;          /* the interrupt endpoint handle */
 135         unsigned char           *interrupt_in_buffer;           /* the buffer we use for the interrupt endpoint */
 136         struct urb              *interrupt_read_urb;            /* our interrupt urb */
 137
 138         __u8                    bulk_in_endpoint;               /* the bulk in endpoint handle */
 139         unsigned char           *bulk_in_buffer;                /* the buffer we use for the bulk in endpoint */
 140         struct urb              *read_urb;                      /* our bulk read urb */
 141         bool                    read_in_progress;
 142         spinlock_t              es_lock;
 143
 144         __u8                    bulk_out_endpoint;              /* the bulk out endpoint handle */
 145
 146         __s16                   rxBytesAvail;                   /* the number of bytes that we need to read from this device */
 147
 148         enum RXSTATE            rxState;                        /* the current state of the bulk receive processor */
 149         __u8                    rxHeader1;                      /* receive header byte 1 */
 150         __u8                    rxHeader2;                      /* receive header byte 2 */
 151         __u8                    rxHeader3;                      /* receive header byte 3 */
 152         __u8                    rxPort;                         /* the port that we are currently receiving data for */
 153         __u8                    rxStatusCode;                   /* the receive status code */
 154         __u8                    rxStatusParam;                  /* the receive status paramater */
 155         __s16                   rxBytesRemaining;               /* the number of port bytes left to read */
 156         struct usb_serial       *serial;                        /* loop back to the owner of this object */
 157 };
 158
 159 /* baud rate information */
 160 struct divisor_table_entry {
 161         __u32   BaudRate;
 162         __u16  Divisor;
 163 };
 164
 165 /*
 166  * Define table of divisors for Rev A EdgePort/4 hardware
 167  * These assume a 3.6864MHz crystal, the standard /16, and
 168  * MCR.7 = 0.
 169  */
 170
 171 static const struct divisor_table_entry divisor_table[] = {
 172         {   50,         4608},
 173         {   75,         3072},
 174         {   110,        2095},  /* 2094.545455 => 230450   => .0217 % over */
 175         {   134,        1713},  /* 1713.011152 => 230398.5 => .00065% under */
 176         {   150,        1536},
 177         {   300,        768},
 178         {   600,        384},
 179         {   1200,       192},
 180         {   1800,       128},
 181         {   2400,       96},
 182         {   4800,       48},
 183         {   7200,       32},
 184         {   9600,       24},
 185         {   14400,      16},
 186         {   19200,      12},
 187         {   38400,      6},
 188         {   57600,      4},
 189         {   115200,     2},
 190         {   230400,     1},
 191 };
 192
 193 /* local variables */
 194 static bool debug;
 195
 196 static atomic_t CmdUrbs;        /* Number of outstanding Command Write Urbs */
 197
 198
 199 /* local function prototypes */
 200
 201 /* function prototypes for all URB callbacks */
 202 static void edge_interrupt_callback(struct urb *urb);
 203 static void edge_bulk_in_callback(struct urb *urb);
 204 static void edge_bulk_out_data_callback(struct urb *urb);
 205 static void edge_bulk_out_cmd_callback(struct urb *urb);
 206
 207 /* function prototypes for the usbserial callbacks */
 208 static int edge_open(struct tty_struct *tty, struct usb_serial_port *port);
 209 static void edge_close(struct usb_serial_port *port);
 210 static int edge_write(struct tty_struct *tty, struct usb_serial_port *port,
 211                                         const unsigned char *buf, int count);
 212 static int edge_write_room(struct tty_struct *tty);
 213 static int edge_chars_in_buffer(struct tty_struct *tty);
 214 static void edge_throttle(struct tty_struct *tty);
 215 static void edge_unthrottle(struct tty_struct *tty);
 216 static void edge_set_termios(struct tty_struct *tty,
 217                                         struct usb_serial_port *port,
 218                                         struct ktermios *old_termios);
 219 static int  edge_ioctl(struct tty_struct *tty,
 220                                         unsigned int cmd, unsigned long arg);
 221 static void edge_break(struct tty_struct *tty, int break_state);
 222 static int  edge_tiocmget(struct tty_struct *tty);
 223 static int  edge_tiocmset(struct tty_struct *tty,
 224                                         unsigned int set, unsigned int clear);
 225 static int  edge_get_icount(struct tty_struct *tty,
 226                                 struct serial_icounter_struct *icount);
 227 static int  edge_startup(struct usb_serial *serial);
 228 static void edge_disconnect(struct usb_serial *serial);
 229 static void edge_release(struct usb_serial *serial);
 230
 231 #include "io_tables.h"  /* all of the devices that this driver supports */
 232
 233 /* function prototypes for all of our local functions */
 234
 235 static void  process_rcvd_data(struct edgeport_serial *edge_serial,
 236                                 unsigned char *buffer, __u16 bufferLength);
 237 static void process_rcvd_status(struct edgeport_serial *edge_serial,
 238                                 __u8 byte2, __u8 byte3);
 239 static void edge_tty_recv(struct device *dev, struct tty_struct *tty,
 240                                 unsigned char *data, int length);
 241 static void handle_new_msr(struct edgeport_port *edge_port, __u8 newMsr);
 242 static void handle_new_lsr(struct edgeport_port *edge_port, __u8 lsrData,
 243                                 __u8 lsr, __u8 data);
 244 static int  send_iosp_ext_cmd(struct edgeport_port *edge_port, __u8 command,
 245                                 __u8 param);
 246 static int  calc_baud_rate_divisor(int baud_rate, int *divisor);
 247 static int  send_cmd_write_baud_rate(struct edgeport_port *edge_port,
 248                                 int baudRate);
 249 static void change_port_settings(struct tty_struct *tty,
 250                                 struct edgeport_port *edge_port,
 251                                 struct ktermios *old_termios);
 252 static int  send_cmd_write_uart_register(struct edgeport_port *edge_port,
 253                                 __u8 regNum, __u8 regValue);
 254 static int  write_cmd_usb(struct edgeport_port *edge_port,
 255                                 unsigned char *buffer, int writeLength);
 256 static void send_more_port_data(struct edgeport_serial *edge_serial,
 257                                 struct edgeport_port *edge_port);
 258
 259 static int sram_write(struct usb_serial *serial, __u16 extAddr, __u16 addr,
 260                                         __u16 length, const __u8 *data);
 261 static int rom_read(struct usb_serial *serial, __u16 extAddr, __u16 addr,
 262                                                 __u16 length, __u8 *data);
 263 static int rom_write(struct usb_serial *serial, __u16 extAddr, __u16 addr,
 264                                         __u16 length, const __u8 *data);
 265 static void get_manufacturing_desc(struct edgeport_serial *edge_serial);
 266 static void get_boot_desc(struct edgeport_serial *edge_serial);
 267 static void load_application_firmware(struct edgeport_serial *edge_serial);
 268
 269 static void unicode_to_ascii(char *string, int buflen,
 270                                 __le16 *unicode, int unicode_size);
 271
 272
 273 /* ************************************************************************ */
 274 /* ************************************************************************ */
 275 /* ************************************************************************ */
 276 /* ************************************************************************ */
 277
 278 /************************************************************************
 279  *                                                                      *
 280  * update_edgeport_E2PROM()     Compare current versions of             *
 281  *                              Boot ROM and Manufacture                *
 282  *                              Descriptors with versions               *
 283  *                              embedded in this driver                 *
 284  *                                                                      *
 285  ************************************************************************/
 286 static void update_edgeport_E2PROM(struct edgeport_serial *edge_serial)
 287 {
 288         __u32 BootCurVer;
 289         __u32 BootNewVer;
 290         __u8 BootMajorVersion;
 291         __u8 BootMinorVersion;
 292         __u16 BootBuildNumber;
 293         __u32 Bootaddr;
 294         const struct ihex_binrec *rec;
 295         const struct firmware *fw;
 296         const char *fw_name;
 297         int response;
 298
 299         switch (edge_serial->product_info.iDownloadFile) {
 300         case EDGE_DOWNLOAD_FILE_I930:
 301                 fw_name = "edgeport/boot.fw";
 302                 break;
 303         case EDGE_DOWNLOAD_FILE_80251:
 304                 fw_name = "edgeport/boot2.fw";
 305                 break;
 306         default:
 307                 return;
 308         }
 309
 310         response = request_ihex_firmware(&fw, fw_name,
 311                                          &edge_serial->serial->dev->dev);
 312         if (response) {
 313                 printk(KERN_ERR "Failed to load image \"%s\" err %d\n",
 314                        fw_name, response);
 315                 return;
 316         }
 317
 318         rec = (const struct ihex_binrec *)fw->data;
 319         BootMajorVersion = rec->data[0];
 320         BootMinorVersion = rec->data[1];
 321         BootBuildNumber = (rec->data[2] << 8) | rec->data[3];
 322
 323         /* Check Boot Image Version */
 324         BootCurVer = (edge_serial->boot_descriptor.MajorVersion << 24) +
 325                      (edge_serial->boot_descriptor.MinorVersion << 16) +
 326                       le16_to_cpu(edge_serial->boot_descriptor.BuildNumber);
 327
 328         BootNewVer = (BootMajorVersion << 24) +
 329                      (BootMinorVersion << 16) +
 330                       BootBuildNumber;
 331
 332         dbg("Current Boot Image version %d.%d.%d",
 333             edge_serial->boot_descriptor.MajorVersion,
 334             edge_serial->boot_descriptor.MinorVersion,
 335             le16_to_cpu(edge_serial->boot_descriptor.BuildNumber));
 336
 337
 338         if (BootNewVer > BootCurVer) {
 339                 dbg("**Update Boot Image from %d.%d.%d to %d.%d.%d",
 340                     edge_serial->boot_descriptor.MajorVersion,
 341                     edge_serial->boot_descriptor.MinorVersion,
 342                     le16_to_cpu(edge_serial->boot_descriptor.BuildNumber),
 343                     BootMajorVersion, BootMinorVersion, BootBuildNumber);
 344
 345                 dbg("Downloading new Boot Image");
 346
 347                 for (rec = ihex_next_binrec(rec); rec;
 348                      rec = ihex_next_binrec(rec)) {
 349                         Bootaddr = be32_to_cpu(rec->addr);
 350                         response = rom_write(edge_serial->serial,
 351                                              Bootaddr >> 16,
 352                                              Bootaddr & 0xFFFF,
 353                                              be16_to_cpu(rec->len),
 354                                              &rec->data[0]);
 355                         if (response < 0) {
 356                                 dev_err(&edge_serial->serial->dev->dev,
 357                                         "rom_write failed (%x, %x, %d)\n",
 358                                         Bootaddr >> 16, Bootaddr & 0xFFFF,
 359                                         be16_to_cpu(rec->len));
 360                                 break;
 361                         }
 362                 }
 363         } else {
 364                 dbg("Boot Image -- already up to date");
 365         }
 366         release_firmware(fw);
 367 }
 368
 369 #if 0
 370 /************************************************************************
 371  *
 372  *  Get string descriptor from device
 373  *
 374  ************************************************************************/
 375 static int get_string_desc(struct usb_device *dev, int Id,
 376                                 struct usb_string_descriptor **pRetDesc)
 377 {
 378         struct usb_string_descriptor StringDesc;
 379         struct usb_string_descriptor *pStringDesc;
 380
 381         dbg("%s - USB String ID = %d", __func__, Id);
 382
 383         if (!usb_get_descriptor(dev, USB_DT_STRING, Id, &StringDesc,
 384                                                 sizeof(StringDesc)))
 385                 return 0;
 386
 387         pStringDesc = kmalloc(StringDesc.bLength, GFP_KERNEL);
 388         if (!pStringDesc)
 389                 return -1;
 390
 391         if (!usb_get_descriptor(dev, USB_DT_STRING, Id, pStringDesc,
 392                                                         StringDesc.bLength)) {
 393                 kfree(pStringDesc);
 394                 return -1;
 395         }
 396
 397         *pRetDesc = pStringDesc;
 398         return 0;
 399 }
 400 #endif
 401
 402 static void dump_product_info(struct edgeport_product_info *product_info)
 403 {
 404         /* Dump Product Info structure */
 405         dbg("**Product Information:");
 406         dbg("  ProductId             %x", product_info->ProductId);
 407         dbg("  NumPorts              %d", product_info->NumPorts);
 408         dbg("  ProdInfoVer           %d", product_info->ProdInfoVer);
 409         dbg("  IsServer              %d", product_info->IsServer);
 410         dbg("  IsRS232               %d", product_info->IsRS232);
 411         dbg("  IsRS422               %d", product_info->IsRS422);
 412         dbg("  IsRS485               %d", product_info->IsRS485);
 413         dbg("  RomSize               %d", product_info->RomSize);
 414         dbg("  RamSize               %d", product_info->RamSize);
 415         dbg("  CpuRev                %x", product_info->CpuRev);
 416         dbg("  BoardRev              %x", product_info->BoardRev);
 417         dbg("  BootMajorVersion      %d.%d.%d", product_info->BootMajorVersion,
 418             product_info->BootMinorVersion,
 419             le16_to_cpu(product_info->BootBuildNumber));
 420         dbg("  FirmwareMajorVersion  %d.%d.%d",
 421                         product_info->FirmwareMajorVersion,
 422                         product_info->FirmwareMinorVersion,
 423                         le16_to_cpu(product_info->FirmwareBuildNumber));
 424         dbg("  ManufactureDescDate   %d/%d/%d",
 425                         product_info->ManufactureDescDate[0],
 426                         product_info->ManufactureDescDate[1],
 427                         product_info->ManufactureDescDate[2]+1900);
 428         dbg("  iDownloadFile         0x%x", product_info->iDownloadFile);
 429         dbg("  EpicVer               %d", product_info->EpicVer);
 430 }
 431
 432 static void get_product_info(struct edgeport_serial *edge_serial)
 433 {
 434         struct edgeport_product_info *product_info = &edge_serial->product_info;
 435
 436         memset(product_info, 0, sizeof(struct edgeport_product_info));
 437
 438         product_info->ProductId = (__u16)(le16_to_cpu(edge_serial->serial->dev->descriptor.idProduct) & ~ION_DEVICE_ID_80251_NETCHIP);
 439         product_info->NumPorts = edge_serial->manuf_descriptor.NumPorts;
 440         product_info->ProdInfoVer = 0;
 441
 442         product_info->RomSize = edge_serial->manuf_descriptor.RomSize;
 443         product_info->RamSize = edge_serial->manuf_descriptor.RamSize;
 444         product_info->CpuRev = edge_serial->manuf_descriptor.CpuRev;
 445         product_info->BoardRev = edge_serial->manuf_descriptor.BoardRev;
 446
 447         product_info->BootMajorVersion =
 448                                 edge_serial->boot_descriptor.MajorVersion;
 449         product_info->BootMinorVersion =
 450                                 edge_serial->boot_descriptor.MinorVersion;
 451         product_info->BootBuildNumber =
 452                                 edge_serial->boot_descriptor.BuildNumber;
 453
 454         memcpy(product_info->ManufactureDescDate,
 455                         edge_serial->manuf_descriptor.DescDate,
 456                         sizeof(edge_serial->manuf_descriptor.DescDate));
 457
 458         /* check if this is 2nd generation hardware */
 459         if (le16_to_cpu(edge_serial->serial->dev->descriptor.idProduct)
 460                                             & ION_DEVICE_ID_80251_NETCHIP)
 461                 product_info->iDownloadFile = EDGE_DOWNLOAD_FILE_80251;
 462         else
 463                 product_info->iDownloadFile = EDGE_DOWNLOAD_FILE_I930;
 464
 465         /* Determine Product type and set appropriate flags */
 466         switch (DEVICE_ID_FROM_USB_PRODUCT_ID(product_info->ProductId)) {
 467         case ION_DEVICE_ID_EDGEPORT_COMPATIBLE:
 468         case ION_DEVICE_ID_EDGEPORT_4T:
 469         case ION_DEVICE_ID_EDGEPORT_4:
 470         case ION_DEVICE_ID_EDGEPORT_2:
 471         case ION_DEVICE_ID_EDGEPORT_8_DUAL_CPU:
 472         case ION_DEVICE_ID_EDGEPORT_8:
 473         case ION_DEVICE_ID_EDGEPORT_421:
 474         case ION_DEVICE_ID_EDGEPORT_21:
 475         case ION_DEVICE_ID_EDGEPORT_2_DIN:
 476         case ION_DEVICE_ID_EDGEPORT_4_DIN:
 477         case ION_DEVICE_ID_EDGEPORT_16_DUAL_CPU:
 478                 product_info->IsRS232 = 1;
 479                 break;
 480
 481         case ION_DEVICE_ID_EDGEPORT_2I: /* Edgeport/2 RS422/RS485 */
 482                 product_info->IsRS422 = 1;
 483                 product_info->IsRS485 = 1;
 484                 break;
 485
 486         case ION_DEVICE_ID_EDGEPORT_8I: /* Edgeport/4 RS422 */
 487         case ION_DEVICE_ID_EDGEPORT_4I: /* Edgeport/4 RS422 */
 488                 product_info->IsRS422 = 1;
 489                 break;
 490         }
 491
 492         dump_product_info(product_info);
 493 }
 494
 495 static int get_epic_descriptor(struct edgeport_serial *ep)
 496 {
 497         int result;
 498         struct usb_serial *serial = ep->serial;
 499         struct edgeport_product_info *product_info = &ep->product_info;
 500         struct edge_compatibility_descriptor *epic = &ep->epic_descriptor;
 501         struct edge_compatibility_bits *bits;
 502
 503         ep->is_epic = 0;
 504         result = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
 505                                  USB_REQUEST_ION_GET_EPIC_DESC,
 506                                  0xC0, 0x00, 0x00,
 507                                  &ep->epic_descriptor,
 508                                  sizeof(struct edge_compatibility_descriptor),
 509                                  300);
 510
 511         dbg("%s result = %d", __func__, result);
 512
 513         if (result > 0) {
 514                 ep->is_epic = 1;
 515                 memset(product_info, 0, sizeof(struct edgeport_product_info));
 516
 517                 product_info->NumPorts = epic->NumPorts;
 518                 product_info->ProdInfoVer = 0;
 519                 product_info->FirmwareMajorVersion = epic->MajorVersion;
 520                 product_info->FirmwareMinorVersion = epic->MinorVersion;
 521                 product_info->FirmwareBuildNumber = epic->BuildNumber;
 522                 product_info->iDownloadFile = epic->iDownloadFile;
 523                 product_info->EpicVer = epic->EpicVer;
 524                 product_info->Epic = epic->Supports;
 525                 product_info->ProductId = ION_DEVICE_ID_EDGEPORT_COMPATIBLE;
 526                 dump_product_info(product_info);
 527
 528                 bits = &ep->epic_descriptor.Supports;
 529                 dbg("**EPIC descriptor:");
 530                 dbg("  VendEnableSuspend: %s", bits->VendEnableSuspend  ? "TRUE": "FALSE");
 531                 dbg("  IOSPOpen         : %s", bits->IOSPOpen           ? "TRUE": "FALSE");
 532                 dbg("  IOSPClose        : %s", bits->IOSPClose          ? "TRUE": "FALSE");
 533                 dbg("  IOSPChase        : %s", bits->IOSPChase          ? "TRUE": "FALSE");
 534                 dbg("  IOSPSetRxFlow    : %s", bits->IOSPSetRxFlow      ? "TRUE": "FALSE");
 535                 dbg("  IOSPSetTxFlow    : %s", bits->IOSPSetTxFlow      ? "TRUE": "FALSE");
 536                 dbg("  IOSPSetXChar     : %s", bits->IOSPSetXChar       ? "TRUE": "FALSE");
 537                 dbg("  IOSPRxCheck      : %s", bits->IOSPRxCheck        ? "TRUE": "FALSE");
 538                 dbg("  IOSPSetClrBreak  : %s", bits->IOSPSetClrBreak    ? "TRUE": "FALSE");
 539                 dbg("  IOSPWriteMCR     : %s", bits->IOSPWriteMCR       ? "TRUE": "FALSE");
 540                 dbg("  IOSPWriteLCR     : %s", bits->IOSPWriteLCR       ? "TRUE": "FALSE");
 541                 dbg("  IOSPSetBaudRate  : %s", bits->IOSPSetBaudRate    ? "TRUE": "FALSE");
 542                 dbg("  TrueEdgeport     : %s", bits->TrueEdgeport       ? "TRUE": "FALSE");
 543         }
 544
 545         return result;
 546 }
 547
 548
 549 /************************************************************************/
 550 /************************************************************************/
 551 /*            U S B  C A L L B A C K   F U N C T I O N S                */
 552 /*            U S B  C A L L B A C K   F U N C T I O N S                */
 553 /************************************************************************/
 554 /************************************************************************/
 555
 556 /*****************************************************************************
 557  * edge_interrupt_callback
 558  *      this is the callback function for when we have received data on the
 559  *      interrupt endpoint.
 560  *****************************************************************************/
 561 static void edge_interrupt_callback(struct urb *urb)
 562 {
 563         struct edgeport_serial  *edge_serial = urb->context;
 564         struct edgeport_port *edge_port;
 565         struct usb_serial_port *port;
 566         struct tty_struct *tty;
 567         unsigned char *data = urb->transfer_buffer;
 568         int length = urb->actual_length;
 569         int bytes_avail;
 570         int position;
 571         int txCredits;
 572         int portNumber;
 573         int result;
 574         int status = urb->status;
 575
 576         dbg("%s", __func__);
 577
 578         switch (status) {
 579         case 0:
 580                 /* success */
 581                 break;
 582         case -ECONNRESET:
 583         case -ENOENT:
 584         case -ESHUTDOWN:
 585                 /* this urb is terminated, clean up */
 586                 dbg("%s - urb shutting down with status: %d",
 587                                                 __func__, status);
 588                 return;
 589         default:
 590                 dbg("%s - nonzero urb status received: %d", __func__, status);
 591                 goto exit;
 592         }
 593
 594         /* process this interrupt-read even if there are no ports open */
 595         if (length) {
 596                 usb_serial_debug_data(debug, &edge_serial->serial->dev->dev,
 597                                                 __func__, length, data);
 598
 599                 if (length > 1) {
 600                         bytes_avail = data[0] | (data[1] << 8);
 601                         if (bytes_avail) {
 602                                 spin_lock(&edge_serial->es_lock);
 603                                 edge_serial->rxBytesAvail += bytes_avail;
 604                                 dbg("%s - bytes_avail=%d, rxBytesAvail=%d, read_in_progress=%d", __func__, bytes_avail, edge_serial->rxBytesAvail, edge_serial->read_in_progress);
 605
 606                                 if (edge_serial->rxBytesAvail > 0 &&
 607                                     !edge_serial->read_in_progress) {
 608                                         dbg("%s - posting a read", __func__);
 609                                         edge_serial->read_in_progress = true;
 610
 611                                         /* we have pending bytes on the
 612                                            bulk in pipe, send a request */
 613                                         result = usb_submit_urb(edge_serial->read_urb, GFP_ATOMIC);
 614                                         if (result) {
 615                                                 dev_err(&edge_serial->serial->dev->dev, "%s - usb_submit_urb(read bulk) failed with result = %d\n", __func__, result);
 616                                                 edge_serial->read_in_progress = false;
 617                                         }
 618                                 }
 619                                 spin_unlock(&edge_serial->es_lock);
 620                         }
 621                 }
 622                 /* grab the txcredits for the ports if available */
 623                 position = 2;
 624                 portNumber = 0;
 625                 while ((position < length) &&
 626                                 (portNumber < edge_serial->serial->num_ports)) {
 627                         txCredits = data[position] | (data[position+1] << 8);
 628                         if (txCredits) {
 629                                 port = edge_serial->serial->port[portNumber];
 630                                 edge_port = usb_get_serial_port_data(port);
 631                                 if (edge_port->open) {
 632                                         spin_lock(&edge_port->ep_lock);
 633                                         edge_port->txCredits += txCredits;
 634                                         spin_unlock(&edge_port->ep_lock);
 635                                         dbg("%s - txcredits for port%d = %d",
 636                                                         __func__, portNumber,
 637                                                         edge_port->txCredits);
 638
 639                                         /* tell the tty driver that something
 640                                            has changed */
 641                                         tty = tty_port_tty_get(
 642                                                 &edge_port->port->port);
 643                                         if (tty) {
 644                                                 tty_wakeup(tty);
 645                                                 tty_kref_put(tty);
 646                                         }
 647                                         /* Since we have more credit, check
 648                                            if more data can be sent */
 649                                         send_more_port_data(edge_serial,
 650                                                                 edge_port);
 651                                 }
 652                         }
 653                         position += 2;
 654                         ++portNumber;
 655                 }
 656         }
 657
 658 exit:
 659         result = usb_submit_urb(urb, GFP_ATOMIC);
 660         if (result)
 661                 dev_err(&urb->dev->dev,
 662                         "%s - Error %d submitting control urb\n",
 663                                                 __func__, result);
 664 }
 665
 666
 667 /*****************************************************************************
 668  * edge_bulk_in_callback
 669  *      this is the callback function for when we have received data on the
 670  *      bulk in endpoint.
 671  *****************************************************************************/
 672 static void edge_bulk_in_callback(struct urb *urb)
 673 {
 674         struct edgeport_serial  *edge_serial = urb->context;
 675         unsigned char           *data = urb->transfer_buffer;
 676         int                     retval;
 677         __u16                   raw_data_length;
 678         int status = urb->status;
 679
 680         dbg("%s", __func__);
 681
 682         if (status) {
 683                 dbg("%s - nonzero read bulk status received: %d",
 684                     __func__, status);
 685                 edge_serial->read_in_progress = false;
 686                 return;
 687         }
 688
 689         if (urb->actual_length == 0) {
 690                 dbg("%s - read bulk callback with no data", __func__);
 691                 edge_serial->read_in_progress = false;
 692                 return;
 693         }
 694
 695         raw_data_length = urb->actual_length;
 696
 697         usb_serial_debug_data(debug, &edge_serial->serial->dev->dev,
 698                                         __func__, raw_data_length, data);
 699
 700         spin_lock(&edge_serial->es_lock);
 701
 702         /* decrement our rxBytes available by the number that we just got */
 703         edge_serial->rxBytesAvail -= raw_data_length;
 704
 705         dbg("%s - Received = %d, rxBytesAvail %d", __func__,
 706                                 raw_data_length, edge_serial->rxBytesAvail);
 707
 708         process_rcvd_data(edge_serial, data, urb->actual_length);
 709
 710         /* check to see if there's any more data for us to read */
 711         if (edge_serial->rxBytesAvail > 0) {
 712                 dbg("%s - posting a read", __func__);
 713                 retval = usb_submit_urb(edge_serial->read_urb, GFP_ATOMIC);
 714                 if (retval) {
 715                         dev_err(&urb->dev->dev,
 716                                 "%s - usb_submit_urb(read bulk) failed, "
 717                                 "retval = %d\n", __func__, retval);
 718                         edge_serial->read_in_progress = false;
 719                 }
 720         } else {
 721                 edge_serial->read_in_progress = false;
 722         }
 723
 724         spin_unlock(&edge_serial->es_lock);
 725 }
 726
 727
 728 /*****************************************************************************
 729  * edge_bulk_out_data_callback
 730  *      this is the callback function for when we have finished sending
 731  *      serial data on the bulk out endpoint.
 732  *****************************************************************************/
 733 static void edge_bulk_out_data_callback(struct urb *urb)
 734 {
 735         struct edgeport_port *edge_port = urb->context;
 736         struct tty_struct *tty;
 737         int status = urb->status;
 738
 739         dbg("%s", __func__);
 740
 741         if (status) {
 742                 dbg("%s - nonzero write bulk status received: %d",
 743                     __func__, status);
 744         }
 745
 746         tty = tty_port_tty_get(&edge_port->port->port);
 747
 748         if (tty && edge_port->open) {
 749                 /* let the tty driver wakeup if it has a special
 750                    write_wakeup function */
 751                 tty_wakeup(tty);
 752         }
 753         tty_kref_put(tty);
 754
 755         /* Release the Write URB */
 756         edge_port->write_in_progress = false;
 757
 758         /* Check if more data needs to be sent */
 759         send_more_port_data((struct edgeport_serial *)
 760                 (usb_get_serial_data(edge_port->port->serial)), edge_port);
 761 }
 762
 763
 764 /*****************************************************************************
 765  * BulkOutCmdCallback
 766  *      this is the callback function for when we have finished sending a
 767  *      command on the bulk out endpoint.
 768  *****************************************************************************/
 769 static void edge_bulk_out_cmd_callback(struct urb *urb)
 770 {
 771         struct edgeport_port *edge_port = urb->context;
 772         struct tty_struct *tty;
 773         int status = urb->status;
 774
 775         dbg("%s", __func__);
 776
 777         atomic_dec(&CmdUrbs);
 778         dbg("%s - FREE URB %p (outstanding %d)", __func__,
 779                                         urb, atomic_read(&CmdUrbs));
 780
 781
 782         /* clean up the transfer buffer */
 783         kfree(urb->transfer_buffer);
 784
 785         /* Free the command urb */
 786         usb_free_urb(urb);
 787
 788         if (status) {
 789                 dbg("%s - nonzero write bulk status received: %d",
 790                                                         __func__, status);
 791                 return;
 792         }
 793
 794         /* Get pointer to tty */
 795         tty = tty_port_tty_get(&edge_port->port->port);
 796
 797         /* tell the tty driver that something has changed */
 798         if (tty && edge_port->open)
 799                 tty_wakeup(tty);
 800         tty_kref_put(tty);
 801
 802         /* we have completed the command */
 803         edge_port->commandPending = false;
 804         wake_up(&edge_port->wait_command);
 805 }
 806
 807
 808 /*****************************************************************************
 809  * Driver tty interface functions
 810  *****************************************************************************/
 811
 812 /*****************************************************************************
 813  * SerialOpen
 814  *      this function is called by the tty driver when a port is opened
 815  *      If successful, we return 0
 816  *      Otherwise we return a negative error number.
 817  *****************************************************************************/
 818 static int edge_open(struct tty_struct *tty, struct usb_serial_port *port)
 819 {
 820         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
 821         struct usb_serial *serial;
 822         struct edgeport_serial *edge_serial;
 823         int response;
 824
 825         dbg("%s - port %d", __func__, port->number);
 826
 827         if (edge_port == NULL)
 828                 return -ENODEV;
 829
 830         /* see if we've set up our endpoint info yet (can't set it up
 831            in edge_startup as the structures were not set up at that time.) */
 832         serial = port->serial;
 833         edge_serial = usb_get_serial_data(serial);
 834         if (edge_serial == NULL)
 835                 return -ENODEV;
 836         if (edge_serial->interrupt_in_buffer == NULL) {
 837                 struct usb_serial_port *port0 = serial->port[0];
 838
 839                 /* not set up yet, so do it now */
 840                 edge_serial->interrupt_in_buffer =
 841                                         port0->interrupt_in_buffer;
 842                 edge_serial->interrupt_in_endpoint =
 843                                         port0->interrupt_in_endpointAddress;
 844                 edge_serial->interrupt_read_urb = port0->interrupt_in_urb;
 845                 edge_serial->bulk_in_buffer = port0->bulk_in_buffer;
 846                 edge_serial->bulk_in_endpoint =
 847                                         port0->bulk_in_endpointAddress;
 848                 edge_serial->read_urb = port0->read_urb;
 849                 edge_serial->bulk_out_endpoint =
 850                                         port0->bulk_out_endpointAddress;
 851
 852                 /* set up our interrupt urb */
 853                 usb_fill_int_urb(edge_serial->interrupt_read_urb,
 854                       serial->dev,
 855                       usb_rcvintpipe(serial->dev,
 856                                 port0->interrupt_in_endpointAddress),
 857                       port0->interrupt_in_buffer,
 858                       edge_serial->interrupt_read_urb->transfer_buffer_length,
 859                       edge_interrupt_callback, edge_serial,
 860                       edge_serial->interrupt_read_urb->interval);
 861
 862                 /* set up our bulk in urb */
 863                 usb_fill_bulk_urb(edge_serial->read_urb, serial->dev,
 864                         usb_rcvbulkpipe(serial->dev,
 865                                 port0->bulk_in_endpointAddress),
 866                         port0->bulk_in_buffer,
 867                         edge_serial->read_urb->transfer_buffer_length,
 868                         edge_bulk_in_callback, edge_serial);
 869                 edge_serial->read_in_progress = false;
 870
 871                 /* start interrupt read for this edgeport
 872                  * this interrupt will continue as long
 873                  * as the edgeport is connected */
 874                 response = usb_submit_urb(edge_serial->interrupt_read_urb,
 875                                                                 GFP_KERNEL);
 876                 if (response) {
 877                         dev_err(&port->dev,
 878                                 "%s - Error %d submitting control urb\n",
 879                                                         __func__, response);
 880                 }
 881         }
 882
 883         /* initialize our wait queues */
 884         init_waitqueue_head(&edge_port->wait_open);
 885         init_waitqueue_head(&edge_port->wait_chase);
 886         init_waitqueue_head(&edge_port->delta_msr_wait);
 887         init_waitqueue_head(&edge_port->wait_command);
 888
 889         /* initialize our icount structure */
 890         memset(&(edge_port->icount), 0x00, sizeof(edge_port->icount));
 891
 892         /* initialize our port settings */
 893         edge_port->txCredits = 0;       /* Can't send any data yet */
 894         /* Must always set this bit to enable ints! */
 895         edge_port->shadowMCR = MCR_MASTER_IE;
 896         edge_port->chaseResponsePending = false;
 897
 898         /* send a open port command */
 899         edge_port->openPending = true;
 900         edge_port->open        = false;
 901         response = send_iosp_ext_cmd(edge_port, IOSP_CMD_OPEN_PORT, 0);
 902
 903         if (response < 0) {
 904                 dev_err(&port->dev, "%s - error sending open port command\n",
 905                                                                 __func__);
 906                 edge_port->openPending = false;
 907                 return -ENODEV;
 908         }
 909
 910         /* now wait for the port to be completely opened */
 911         wait_event_timeout(edge_port->wait_open, !edge_port->openPending,
 912                                                                 OPEN_TIMEOUT);
 913
 914         if (!edge_port->open) {
 915                 /* open timed out */
 916                 dbg("%s - open timedout", __func__);
 917                 edge_port->openPending = false;
 918                 return -ENODEV;
 919         }
 920
 921         /* create the txfifo */
 922         edge_port->txfifo.head  = 0;
 923         edge_port->txfifo.tail  = 0;
 924         edge_port->txfifo.count = 0;
 925         edge_port->txfifo.size  = edge_port->maxTxCredits;
 926         edge_port->txfifo.fifo  = kmalloc(edge_port->maxTxCredits, GFP_KERNEL);
 927
 928         if (!edge_port->txfifo.fifo) {
 929                 dbg("%s - no memory", __func__);
 930                 edge_close(port);
 931                 return -ENOMEM;
 932         }
 933
 934         /* Allocate a URB for the write */
 935         edge_port->write_urb = usb_alloc_urb(0, GFP_KERNEL);
 936         edge_port->write_in_progress = false;
 937
 938         if (!edge_port->write_urb) {
 939                 dbg("%s - no memory", __func__);
 940                 edge_close(port);
 941                 return -ENOMEM;
 942         }
 943
 944         dbg("%s(%d) - Initialize TX fifo to %d bytes",
 945                         __func__, port->number, edge_port->maxTxCredits);
 946
 947         dbg("%s exited", __func__);
 948
 949         return 0;
 950 }
 951
 952
 953 /************************************************************************
 954  *
 955  * block_until_chase_response
 956  *
 957  *      This function will block the close until one of the following:
 958  *              1. Response to our Chase comes from Edgeport
 959  *              2. A timeout of 10 seconds without activity has expired
 960  *                 (1K of Edgeport data @ 2400 baud ==> 4 sec to empty)
 961  *
 962  ************************************************************************/
 963 static void block_until_chase_response(struct edgeport_port *edge_port)
 964 {
 965         DEFINE_WAIT(wait);
 966         __u16 lastCredits;
 967         int timeout = 1*HZ;
 968         int loop = 10;
 969
 970         while (1) {
 971                 /* Save Last credits */
 972                 lastCredits = edge_port->txCredits;
 973
 974                 /* Did we get our Chase response */
 975                 if (!edge_port->chaseResponsePending) {
 976                         dbg("%s - Got Chase Response", __func__);
 977
 978                         /* did we get all of our credit back? */
 979                         if (edge_port->txCredits == edge_port->maxTxCredits) {
 980                                 dbg("%s - Got all credits", __func__);
 981                                 return;
 982                         }
 983                 }
 984
 985                 /* Block the thread for a while */
 986                 prepare_to_wait(&edge_port->wait_chase, &wait,
 987                                                 TASK_UNINTERRUPTIBLE);
 988                 schedule_timeout(timeout);
 989                 finish_wait(&edge_port->wait_chase, &wait);
 990
 991                 if (lastCredits == edge_port->txCredits) {
 992                         /* No activity.. count down. */
 993                         loop--;
 994                         if (loop == 0) {
 995                                 edge_port->chaseResponsePending = false;
 996                                 dbg("%s - Chase TIMEOUT", __func__);
 997                                 return;
 998                         }
 999                 } else {
1000                         /* Reset timeout value back to 10 seconds */
1001                         dbg("%s - Last %d, Current %d", __func__,
1002                                         lastCredits, edge_port->txCredits);
1003                         loop = 10;
1004                 }
1005         }
1006 }
1007
1008
1009 /************************************************************************
1010  *
1011  * block_until_tx_empty
1012  *
1013  *      This function will block the close until one of the following:
1014  *              1. TX count are 0
1015  *              2. The edgeport has stopped
1016  *              3. A timeout of 3 seconds without activity has expired
1017  *
1018  ************************************************************************/
1019 static void block_until_tx_empty(struct edgeport_port *edge_port)
1020 {
1021         DEFINE_WAIT(wait);
1022         struct TxFifo *fifo = &edge_port->txfifo;
1023         __u32 lastCount;
1024         int timeout = HZ/10;
1025         int loop = 30;
1026
1027         while (1) {
1028                 /* Save Last count */
1029                 lastCount = fifo->count;
1030
1031                 /* Is the Edgeport Buffer empty? */
1032                 if (lastCount == 0) {
1033                         dbg("%s - TX Buffer Empty", __func__);
1034                         return;
1035                 }
1036
1037                 /* Block the thread for a while */
1038                 prepare_to_wait(&edge_port->wait_chase, &wait,
1039                                                 TASK_UNINTERRUPTIBLE);
1040                 schedule_timeout(timeout);
1041                 finish_wait(&edge_port->wait_chase, &wait);
1042
1043                 dbg("%s wait", __func__);
1044
1045                 if (lastCount == fifo->count) {
1046                         /* No activity.. count down. */
1047                         loop--;
1048                         if (loop == 0) {
1049                                 dbg("%s - TIMEOUT", __func__);
1050                                 return;
1051                         }
1052                 } else {
1053                         /* Reset timeout value back to seconds */
1054                         loop = 30;
1055                 }
1056         }
1057 }
1058
1059
1060 /*****************************************************************************
1061  * edge_close
1062  *      this function is called by the tty driver when a port is closed
1063  *****************************************************************************/
1064 static void edge_close(struct usb_serial_port *port)
1065 {
1066         struct edgeport_serial *edge_serial;
1067         struct edgeport_port *edge_port;
1068         int status;
1069
1070         dbg("%s - port %d", __func__, port->number);
1071
1072         edge_serial = usb_get_serial_data(port->serial);
1073         edge_port = usb_get_serial_port_data(port);
1074         if (edge_serial == NULL || edge_port == NULL)
1075                 return;
1076
1077         /* block until tx is empty */
1078         block_until_tx_empty(edge_port);
1079
1080         edge_port->closePending = true;
1081
1082         if ((!edge_serial->is_epic) ||
1083             ((edge_serial->is_epic) &&
1084              (edge_serial->epic_descriptor.Supports.IOSPChase))) {
1085                 /* flush and chase */
1086                 edge_port->chaseResponsePending = true;
1087
1088                 dbg("%s - Sending IOSP_CMD_CHASE_PORT", __func__);
1089                 status = send_iosp_ext_cmd(edge_port, IOSP_CMD_CHASE_PORT, 0);
1090                 if (status == 0)
1091                         /* block until chase finished */
1092                         block_until_chase_response(edge_port);
1093                 else
1094                         edge_port->chaseResponsePending = false;
1095         }
1096
1097         if ((!edge_serial->is_epic) ||
1098             ((edge_serial->is_epic) &&
1099              (edge_serial->epic_descriptor.Supports.IOSPClose))) {
1100                /* close the port */
1101                 dbg("%s - Sending IOSP_CMD_CLOSE_PORT", __func__);
1102                 send_iosp_ext_cmd(edge_port, IOSP_CMD_CLOSE_PORT, 0);
1103         }
1104
1105         /* port->close = true; */
1106         edge_port->closePending = false;
1107         edge_port->open = false;
1108         edge_port->openPending = false;
1109
1110         usb_kill_urb(edge_port->write_urb);
1111
1112         if (edge_port->write_urb) {
1113                 /* if this urb had a transfer buffer already
1114                                 (old transfer) free it */
1115                 kfree(edge_port->write_urb->transfer_buffer);
1116                 usb_free_urb(edge_port->write_urb);
1117                 edge_port->write_urb = NULL;
1118         }
1119         kfree(edge_port->txfifo.fifo);
1120         edge_port->txfifo.fifo = NULL;
1121
1122         dbg("%s exited", __func__);
1123 }
1124
1125 /*****************************************************************************
1126  * SerialWrite
1127  *      this function is called by the tty driver when data should be written
1128  *      to the port.
1129  *      If successful, we return the number of bytes written, otherwise we
1130  *      return a negative error number.
1131  *****************************************************************************/
1132 static int edge_write(struct tty_struct *tty, struct usb_serial_port *port,
1133                                         const unsigned char *data, int count)
1134 {
1135         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1136         struct TxFifo *fifo;
1137         int copySize;
1138         int bytesleft;
1139         int firsthalf;
1140         int secondhalf;
1141         unsigned long flags;
1142
1143         dbg("%s - port %d", __func__, port->number);
1144
1145         if (edge_port == NULL)
1146                 return -ENODEV;
1147
1148         /* get a pointer to the Tx fifo */
1149         fifo = &edge_port->txfifo;
1150
1151         spin_lock_irqsave(&edge_port->ep_lock, flags);
1152
1153         /* calculate number of bytes to put in fifo */
1154         copySize = min((unsigned int)count,
1155                                 (edge_port->txCredits - fifo->count));
1156
1157         dbg("%s(%d) of %d byte(s) Fifo room  %d -- will copy %d bytes",
1158                         __func__, port->number, count,
1159                         edge_port->txCredits - fifo->count, copySize);
1160
1161         /* catch writes of 0 bytes which the tty driver likes to give us,
1162            and when txCredits is empty */
1163         if (copySize == 0) {
1164                 dbg("%s - copySize = Zero", __func__);
1165                 goto finish_write;
1166         }
1167
1168         /* queue the data
1169          * since we can never overflow the buffer we do not have to check for a
1170          * full condition
1171          *
1172          * the copy is done is two parts -- first fill to the end of the buffer
1173          * then copy the reset from the start of the buffer
1174          */
1175         bytesleft = fifo->size - fifo->head;
1176         firsthalf = min(bytesleft, copySize);
1177         dbg("%s - copy %d bytes of %d into fifo ", __func__,
1178                                         firsthalf, bytesleft);
1179
1180         /* now copy our data */
1181         memcpy(&fifo->fifo[fifo->head], data, firsthalf);
1182         usb_serial_debug_data(debug, &port->dev, __func__,
1183                                         firsthalf, &fifo->fifo[fifo->head]);
1184
1185         /* update the index and size */
1186         fifo->head  += firsthalf;
1187         fifo->count += firsthalf;
1188
1189         /* wrap the index */
1190         if (fifo->head == fifo->size)
1191                 fifo->head = 0;
1192
1193         secondhalf = copySize-firsthalf;
1194
1195         if (secondhalf) {
1196                 dbg("%s - copy rest of data %d", __func__, secondhalf);
1197                 memcpy(&fifo->fifo[fifo->head], &data[firsthalf], secondhalf);
1198                 usb_serial_debug_data(debug, &port->dev, __func__,
1199                                         secondhalf, &fifo->fifo[fifo->head]);
1200                 /* update the index and size */
1201                 fifo->count += secondhalf;
1202                 fifo->head  += secondhalf;
1203                 /* No need to check for wrap since we can not get to end of
1204                  * the fifo in this part
1205                  */
1206         }
1207
1208 finish_write:
1209         spin_unlock_irqrestore(&edge_port->ep_lock, flags);
1210
1211         send_more_port_data((struct edgeport_serial *)
1212                         usb_get_serial_data(port->serial), edge_port);
1213
1214         dbg("%s wrote %d byte(s) TxCredits %d, Fifo %d", __func__,
1215                                 copySize, edge_port->txCredits, fifo->count);
1216
1217         return copySize;
1218 }
1219
1220
1221 /************************************************************************
1222  *
1223  * send_more_port_data()
1224  *
1225  *      This routine attempts to write additional UART transmit data
1226  *      to a port over the USB bulk pipe. It is called (1) when new
1227  *      data has been written to a port's TxBuffer from higher layers
1228  *      (2) when the peripheral sends us additional TxCredits indicating
1229  *      that it can accept more Tx data for a given port; and (3) when
1230  *      a bulk write completes successfully and we want to see if we
1231  *      can transmit more.
1232  *
1233  ************************************************************************/
1234 static void send_more_port_data(struct edgeport_serial *edge_serial,
1235                                         struct edgeport_port *edge_port)
1236 {
1237         struct TxFifo   *fifo = &edge_port->txfifo;
1238         struct urb      *urb;
1239         unsigned char   *buffer;
1240         int             status;
1241         int             count;
1242         int             bytesleft;
1243         int             firsthalf;
1244         int             secondhalf;
1245         unsigned long   flags;
1246
1247         dbg("%s(%d)", __func__, edge_port->port->number);
1248
1249         spin_lock_irqsave(&edge_port->ep_lock, flags);
1250
1251         if (edge_port->write_in_progress ||
1252             !edge_port->open             ||
1253             (fifo->count == 0)) {
1254                 dbg("%s(%d) EXIT - fifo %d, PendingWrite = %d",
1255                                 __func__, edge_port->port->number,
1256                                 fifo->count, edge_port->write_in_progress);
1257                 goto exit_send;
1258         }
1259
1260         /* since the amount of data in the fifo will always fit into the
1261          * edgeport buffer we do not need to check the write length
1262          *
1263          * Do we have enough credits for this port to make it worthwhile
1264          * to bother queueing a write. If it's too small, say a few bytes,
1265          * it's better to wait for more credits so we can do a larger write.
1266          */
1267         if (edge_port->txCredits < EDGE_FW_GET_TX_CREDITS_SEND_THRESHOLD(edge_port->maxTxCredits, EDGE_FW_BULK_MAX_PACKET_SIZE)) {
1268                 dbg("%s(%d) Not enough credit - fifo %d TxCredit %d",
1269                         __func__, edge_port->port->number, fifo->count,
1270                         edge_port->txCredits);
1271                 goto exit_send;
1272         }
1273
1274         /* lock this write */
1275         edge_port->write_in_progress = true;
1276
1277         /* get a pointer to the write_urb */
1278         urb = edge_port->write_urb;
1279
1280         /* make sure transfer buffer is freed */
1281         kfree(urb->transfer_buffer);
1282         urb->transfer_buffer = NULL;
1283
1284         /* build the data header for the buffer and port that we are about
1285            to send out */
1286         count = fifo->count;
1287         buffer = kmalloc(count+2, GFP_ATOMIC);
1288         if (buffer == NULL) {
1289                 dev_err_console(edge_port->port,
1290                                 "%s - no more kernel memory...\n", __func__);
1291                 edge_port->write_in_progress = false;
1292                 goto exit_send;
1293         }
1294         buffer[0] = IOSP_BUILD_DATA_HDR1(edge_port->port->number
1295                                 - edge_port->port->serial->minor, count);
1296         buffer[1] = IOSP_BUILD_DATA_HDR2(edge_port->port->number
1297                                 - edge_port->port->serial->minor, count);
1298
1299         /* now copy our data */
1300         bytesleft =  fifo->size - fifo->tail;
1301         firsthalf = min(bytesleft, count);
1302         memcpy(&buffer[2], &fifo->fifo[fifo->tail], firsthalf);
1303         fifo->tail  += firsthalf;
1304         fifo->count -= firsthalf;
1305         if (fifo->tail == fifo->size)
1306                 fifo->tail = 0;
1307
1308         secondhalf = count-firsthalf;
1309         if (secondhalf) {
1310                 memcpy(&buffer[2+firsthalf], &fifo->fifo[fifo->tail],
1311                                                                 secondhalf);
1312                 fifo->tail  += secondhalf;
1313                 fifo->count -= secondhalf;
1314         }
1315
1316         if (count)
1317                 usb_serial_debug_data(debug, &edge_port->port->dev,
1318                                                 __func__, count, &buffer[2]);
1319
1320         /* fill up the urb with all of our data and submit it */
1321         usb_fill_bulk_urb(urb, edge_serial->serial->dev,
1322                         usb_sndbulkpipe(edge_serial->serial->dev,
1323                                         edge_serial->bulk_out_endpoint),
1324                         buffer, count+2,
1325                         edge_bulk_out_data_callback, edge_port);
1326
1327         /* decrement the number of credits we have by the number we just sent */
1328         edge_port->txCredits -= count;
1329         edge_port->icount.tx += count;
1330
1331         status = usb_submit_urb(urb, GFP_ATOMIC);
1332         if (status) {
1333                 /* something went wrong */
1334                 dev_err_console(edge_port->port,
1335                         "%s - usb_submit_urb(write bulk) failed, status = %d, data lost\n",
1336                                 __func__, status);
1337                 edge_port->write_in_progress = false;
1338
1339                 /* revert the credits as something bad happened. */
1340                 edge_port->txCredits += count;
1341                 edge_port->icount.tx -= count;
1342         }
1343         dbg("%s wrote %d byte(s) TxCredit %d, Fifo %d",
1344                         __func__, count, edge_port->txCredits, fifo->count);
1345
1346 exit_send:
1347         spin_unlock_irqrestore(&edge_port->ep_lock, flags);
1348 }
1349
1350
1351 /*****************************************************************************
1352  * edge_write_room
1353  *      this function is called by the tty driver when it wants to know how
1354  *      many bytes of data we can accept for a specific port. If successful,
1355  *      we return the amount of room that we have for this port (the txCredits)
1356  *      otherwise we return a negative error number.
1357  *****************************************************************************/
1358 static int edge_write_room(struct tty_struct *tty)
1359 {
1360         struct usb_serial_port *port = tty->driver_data;
1361         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1362         int room;
1363         unsigned long flags;
1364
1365         dbg("%s", __func__);
1366
1367         if (edge_port == NULL)
1368                 return 0;
1369         if (edge_port->closePending)
1370                 return 0;
1371
1372         dbg("%s - port %d", __func__, port->number);
1373
1374         if (!edge_port->open) {
1375                 dbg("%s - port not opened", __func__);
1376                 return 0;
1377         }
1378
1379         /* total of both buffers is still txCredit */
1380         spin_lock_irqsave(&edge_port->ep_lock, flags);
1381         room = edge_port->txCredits - edge_port->txfifo.count;
1382         spin_unlock_irqrestore(&edge_port->ep_lock, flags);
1383
1384         dbg("%s - returns %d", __func__, room);
1385         return room;
1386 }
1387
1388
1389 /*****************************************************************************
1390  * edge_chars_in_buffer
1391  *      this function is called by the tty driver when it wants to know how
1392  *      many bytes of data we currently have outstanding in the port (data that
1393  *      has been written, but hasn't made it out the port yet)
1394  *      If successful, we return the number of bytes left to be written in the
1395  *      system,
1396  *      Otherwise we return a negative error number.
1397  *****************************************************************************/
1398 static int edge_chars_in_buffer(struct tty_struct *tty)
1399 {
1400         struct usb_serial_port *port = tty->driver_data;
1401         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1402         int num_chars;
1403         unsigned long flags;
1404
1405         dbg("%s", __func__);
1406
1407         if (edge_port == NULL)
1408                 return 0;
1409         if (edge_port->closePending)
1410                 return 0;
1411
1412         if (!edge_port->open) {
1413                 dbg("%s - port not opened", __func__);
1414                 return 0;
1415         }
1416
1417         spin_lock_irqsave(&edge_port->ep_lock, flags);
1418         num_chars = edge_port->maxTxCredits - edge_port->txCredits +
1419                                                 edge_port->txfifo.count;
1420         spin_unlock_irqrestore(&edge_port->ep_lock, flags);
1421         if (num_chars) {
1422                 dbg("%s(port %d) - returns %d", __func__,
1423                                                 port->number, num_chars);
1424         }
1425
1426         return num_chars;
1427 }
1428
1429
1430 /*****************************************************************************
1431  * SerialThrottle
1432  *      this function is called by the tty driver when it wants to stop the data
1433  *      being read from the port.
1434  *****************************************************************************/
1435 static void edge_throttle(struct tty_struct *tty)
1436 {
1437         struct usb_serial_port *port = tty->driver_data;
1438         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1439         int status;
1440
1441         dbg("%s - port %d", __func__, port->number);
1442
1443         if (edge_port == NULL)
1444                 return;
1445
1446         if (!edge_port->open) {
1447                 dbg("%s - port not opened", __func__);
1448                 return;
1449         }
1450
1451         /* if we are implementing XON/XOFF, send the stop character */
1452         if (I_IXOFF(tty)) {
1453                 unsigned char stop_char = STOP_CHAR(tty);
1454                 status = edge_write(tty, port, &stop_char, 1);
1455                 if (status <= 0)
1456                         return;
1457         }
1458
1459         /* if we are implementing RTS/CTS, toggle that line */
1460         if (tty->termios->c_cflag & CRTSCTS) {
1461                 edge_port->shadowMCR &= ~MCR_RTS;
1462                 status = send_cmd_write_uart_register(edge_port, MCR,
1463                                                         edge_port->shadowMCR);
1464                 if (status != 0)
1465                         return;
1466         }
1467 }
1468
1469
1470 /*****************************************************************************
1471  * edge_unthrottle
1472  *      this function is called by the tty driver when it wants to resume the
1473  *      data being read from the port (called after SerialThrottle is called)
1474  *****************************************************************************/
1475 static void edge_unthrottle(struct tty_struct *tty)
1476 {
1477         struct usb_serial_port *port = tty->driver_data;
1478         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1479         int status;
1480
1481         dbg("%s - port %d", __func__, port->number);
1482
1483         if (edge_port == NULL)
1484                 return;
1485
1486         if (!edge_port->open) {
1487                 dbg("%s - port not opened", __func__);
1488                 return;
1489         }
1490
1491         /* if we are implementing XON/XOFF, send the start character */
1492         if (I_IXOFF(tty)) {
1493                 unsigned char start_char = START_CHAR(tty);
1494                 status = edge_write(tty, port, &start_char, 1);
1495                 if (status <= 0)
1496                         return;
1497         }
1498         /* if we are implementing RTS/CTS, toggle that line */
1499         if (tty->termios->c_cflag & CRTSCTS) {
1500                 edge_port->shadowMCR |= MCR_RTS;
1501                 send_cmd_write_uart_register(edge_port, MCR,
1502                                                 edge_port->shadowMCR);
1503         }
1504 }
1505
1506
1507 /*****************************************************************************
1508  * SerialSetTermios
1509  *      this function is called by the tty driver when it wants to change
1510  * the termios structure
1511  *****************************************************************************/
1512 static void edge_set_termios(struct tty_struct *tty,
1513         struct usb_serial_port *port, struct ktermios *old_termios)
1514 {
1515         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1516         unsigned int cflag;
1517
1518         cflag = tty->termios->c_cflag;
1519         dbg("%s - clfag %08x iflag %08x", __func__,
1520             tty->termios->c_cflag, tty->termios->c_iflag);
1521         dbg("%s - old clfag %08x old iflag %08x", __func__,
1522             old_termios->c_cflag, old_termios->c_iflag);
1523
1524         dbg("%s - port %d", __func__, port->number);
1525
1526         if (edge_port == NULL)
1527                 return;
1528
1529         if (!edge_port->open) {
1530                 dbg("%s - port not opened", __func__);
1531                 return;
1532         }
1533
1534         /* change the port settings to the new ones specified */
1535         change_port_settings(tty, edge_port, old_termios);
1536 }
1537
1538
1539 /*****************************************************************************
1540  * get_lsr_info - get line status register info
1541  *
1542  * Purpose: Let user call ioctl() to get info when the UART physically
1543  *          is emptied.  On bus types like RS485, the transmitter must
1544  *          release the bus after transmitting. This must be done when
1545  *          the transmit shift register is empty, not be done when the
1546  *          transmit holding register is empty.  This functionality
1547  *          allows an RS485 driver to be written in user space.
1548  *****************************************************************************/
1549 static int get_lsr_info(struct edgeport_port *edge_port,
1550                                                 unsigned int __user *value)
1551 {
1552         unsigned int result = 0;
1553         unsigned long flags;
1554
1555         spin_lock_irqsave(&edge_port->ep_lock, flags);
1556         if (edge_port->maxTxCredits == edge_port->txCredits &&
1557             edge_port->txfifo.count == 0) {
1558                 dbg("%s -- Empty", __func__);
1559                 result = TIOCSER_TEMT;
1560         }
1561         spin_unlock_irqrestore(&edge_port->ep_lock, flags);
1562
1563         if (copy_to_user(value, &result, sizeof(int)))
1564                 return -EFAULT;
1565         return 0;
1566 }
1567
1568 static int edge_tiocmset(struct tty_struct *tty,
1569                                         unsigned int set, unsigned int clear)
1570 {
1571         struct usb_serial_port *port = tty->driver_data;
1572         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1573         unsigned int mcr;
1574
1575         dbg("%s - port %d", __func__, port->number);
1576
1577         mcr = edge_port->shadowMCR;
1578         if (set & TIOCM_RTS)
1579                 mcr |= MCR_RTS;
1580         if (set & TIOCM_DTR)
1581                 mcr |= MCR_DTR;
1582         if (set & TIOCM_LOOP)
1583                 mcr |= MCR_LOOPBACK;
1584
1585         if (clear & TIOCM_RTS)
1586                 mcr &= ~MCR_RTS;
1587         if (clear & TIOCM_DTR)
1588                 mcr &= ~MCR_DTR;
1589         if (clear & TIOCM_LOOP)
1590                 mcr &= ~MCR_LOOPBACK;
1591
1592         edge_port->shadowMCR = mcr;
1593
1594         send_cmd_write_uart_register(edge_port, MCR, edge_port->shadowMCR);
1595
1596         return 0;
1597 }
1598
1599 static int edge_tiocmget(struct tty_struct *tty)
1600 {
1601         struct usb_serial_port *port = tty->driver_data;
1602         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1603         unsigned int result = 0;
1604         unsigned int msr;
1605         unsigned int mcr;
1606
1607         dbg("%s - port %d", __func__, port->number);
1608
1609         msr = edge_port->shadowMSR;
1610         mcr = edge_port->shadowMCR;
1611         result = ((mcr & MCR_DTR)       ? TIOCM_DTR: 0)   /* 0x002 */
1612                   | ((mcr & MCR_RTS)    ? TIOCM_RTS: 0)   /* 0x004 */
1613                   | ((msr & EDGEPORT_MSR_CTS)   ? TIOCM_CTS: 0)   /* 0x020 */
1614                   | ((msr & EDGEPORT_MSR_CD)    ? TIOCM_CAR: 0)   /* 0x040 */
1615                   | ((msr & EDGEPORT_MSR_RI)    ? TIOCM_RI:  0)   /* 0x080 */
1616                   | ((msr & EDGEPORT_MSR_DSR)   ? TIOCM_DSR: 0);  /* 0x100 */
1617
1618
1619         dbg("%s -- %x", __func__, result);
1620
1621         return result;
1622 }
1623
1624 static int edge_get_icount(struct tty_struct *tty,
1625                                 struct serial_icounter_struct *icount)
1626 {
1627         struct usb_serial_port *port = tty->driver_data;
1628         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1629         struct async_icount cnow;
1630         cnow = edge_port->icount;
1631
1632         icount->cts = cnow.cts;
1633         icount->dsr = cnow.dsr;
1634         icount->rng = cnow.rng;
1635         icount->dcd = cnow.dcd;
1636         icount->rx = cnow.rx;
1637         icount->tx = cnow.tx;
1638         icount->frame = cnow.frame;
1639         icount->overrun = cnow.overrun;
1640         icount->parity = cnow.parity;
1641         icount->brk = cnow.brk;
1642         icount->buf_overrun = cnow.buf_overrun;
1643
1644         dbg("%s (%d) TIOCGICOUNT RX=%d, TX=%d",
1645                         __func__,  port->number, icount->rx, icount->tx);
1646         return 0;
1647 }
1648
1649 static int get_serial_info(struct edgeport_port *edge_port,
1650                                 struct serial_struct __user *retinfo)
1651 {
1652         struct serial_struct tmp;
1653
1654         if (!retinfo)
1655                 return -EFAULT;
1656
1657         memset(&tmp, 0, sizeof(tmp));
1658
1659         tmp.type                = PORT_16550A;
1660         tmp.line                = edge_port->port->serial->minor;
1661         tmp.port                = edge_port->port->number;
1662         tmp.irq                 = 0;
1663         tmp.flags               = ASYNC_SKIP_TEST | ASYNC_AUTO_IRQ;
1664         tmp.xmit_fifo_size      = edge_port->maxTxCredits;
1665         tmp.baud_base           = 9600;
1666         tmp.close_delay         = 5*HZ;
1667         tmp.closing_wait        = 30*HZ;
1668
1669         if (copy_to_user(retinfo, &tmp, sizeof(*retinfo)))
1670                 return -EFAULT;
1671         return 0;
1672 }
1673
1674
1675 /*****************************************************************************
1676  * SerialIoctl
1677  *      this function handles any ioctl calls to the driver
1678  *****************************************************************************/
1679 static int edge_ioctl(struct tty_struct *tty,
1680                                         unsigned int cmd, unsigned long arg)
1681 {
1682         struct usb_serial_port *port = tty->driver_data;
1683         DEFINE_WAIT(wait);
1684         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1685         struct async_icount cnow;
1686         struct async_icount cprev;
1687
1688         dbg("%s - port %d, cmd = 0x%x", __func__, port->number, cmd);
1689
1690         switch (cmd) {
1691         case TIOCSERGETLSR:
1692                 dbg("%s (%d) TIOCSERGETLSR", __func__,  port->number);
1693                 return get_lsr_info(edge_port, (unsigned int __user *) arg);
1694
1695         case TIOCGSERIAL:
1696                 dbg("%s (%d) TIOCGSERIAL", __func__,  port->number);
1697                 return get_serial_info(edge_port, (struct serial_struct __user *) arg);
1698
1699         case TIOCMIWAIT:
1700                 dbg("%s (%d) TIOCMIWAIT", __func__,  port->number);
1701                 cprev = edge_port->icount;
1702                 while (1) {
1703                         prepare_to_wait(&edge_port->delta_msr_wait,
1704                                                 &wait, TASK_INTERRUPTIBLE);
1705                         schedule();
1706                         finish_wait(&edge_port->delta_msr_wait, &wait);
1707                         /* see if a signal did it */
1708                         if (signal_pending(current))
1709                                 return -ERESTARTSYS;
1710                         cnow = edge_port->icount;
1711                         if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr &&
1712                             cnow.dcd == cprev.dcd && cnow.cts == cprev.cts)
1713                                 return -EIO; /* no change => error */
1714                         if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
1715                             ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
1716                             ((arg & TIOCM_CD)  && (cnow.dcd != cprev.dcd)) ||
1717                             ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts))) {
1718                                 return 0;
1719                         }
1720                         cprev = cnow;
1721                 }
1722                 /* NOTREACHED */
1723                 break;
1724
1725         }
1726         return -ENOIOCTLCMD;
1727 }
1728
1729
1730 /*****************************************************************************
1731  * SerialBreak
1732  *      this function sends a break to the port
1733  *****************************************************************************/
1734 static void edge_break(struct tty_struct *tty, int break_state)
1735 {
1736         struct usb_serial_port *port = tty->driver_data;
1737         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1738         struct edgeport_serial *edge_serial = usb_get_serial_data(port->serial);
1739         int status;
1740
1741         if ((!edge_serial->is_epic) ||
1742             ((edge_serial->is_epic) &&
1743              (edge_serial->epic_descriptor.Supports.IOSPChase))) {
1744                 /* flush and chase */
1745                 edge_port->chaseResponsePending = true;
1746
1747                 dbg("%s - Sending IOSP_CMD_CHASE_PORT", __func__);
1748                 status = send_iosp_ext_cmd(edge_port, IOSP_CMD_CHASE_PORT, 0);
1749                 if (status == 0) {
1750                         /* block until chase finished */
1751                         block_until_chase_response(edge_port);
1752                 } else {
1753                         edge_port->chaseResponsePending = false;
1754                 }
1755         }
1756
1757         if ((!edge_serial->is_epic) ||
1758             ((edge_serial->is_epic) &&
1759              (edge_serial->epic_descriptor.Supports.IOSPSetClrBreak))) {
1760                 if (break_state == -1) {
1761                         dbg("%s - Sending IOSP_CMD_SET_BREAK", __func__);
1762                         status = send_iosp_ext_cmd(edge_port,
1763                                                 IOSP_CMD_SET_BREAK, 0);
1764                 } else {
1765                         dbg("%s - Sending IOSP_CMD_CLEAR_BREAK", __func__);
1766                         status = send_iosp_ext_cmd(edge_port,
1767                                                 IOSP_CMD_CLEAR_BREAK, 0);
1768                 }
1769                 if (status)
1770                         dbg("%s - error sending break set/clear command.",
1771                                 __func__);
1772         }
1773 }
1774
1775
1776 /*****************************************************************************
1777  * process_rcvd_data
1778  *      this function handles the data received on the bulk in pipe.
1779  *****************************************************************************/
1780 static void process_rcvd_data(struct edgeport_serial *edge_serial,
1781                                 unsigned char *buffer, __u16 bufferLength)
1782 {
1783         struct usb_serial_port *port;
1784         struct edgeport_port *edge_port;
1785         struct tty_struct *tty;
1786         __u16 lastBufferLength;
1787         __u16 rxLen;
1788
1789         dbg("%s", __func__);
1790
1791         lastBufferLength = bufferLength + 1;
1792
1793         while (bufferLength > 0) {
1794                 /* failsafe incase we get a message that we don't understand */
1795                 if (lastBufferLength == bufferLength) {
1796                         dbg("%s - stuck in loop, exiting it.", __func__);
1797                         break;
1798                 }
1799                 lastBufferLength = bufferLength;
1800
1801                 switch (edge_serial->rxState) {
1802                 case EXPECT_HDR1:
1803                         edge_serial->rxHeader1 = *buffer;
1804                         ++buffer;
1805                         --bufferLength;
1806
1807                         if (bufferLength == 0) {
1808                                 edge_serial->rxState = EXPECT_HDR2;
1809                                 break;
1810                         }
1811                         /* otherwise, drop on through */
1812                 case EXPECT_HDR2:
1813                         edge_serial->rxHeader2 = *buffer;
1814                         ++buffer;
1815                         --bufferLength;
1816
1817                         dbg("%s - Hdr1=%02X Hdr2=%02X", __func__,
1818                             edge_serial->rxHeader1, edge_serial->rxHeader2);
1819                         /* Process depending on whether this header is
1820                          * data or status */
1821
1822                         if (IS_CMD_STAT_HDR(edge_serial->rxHeader1)) {
1823                                 /* Decode this status header and go to
1824                                  * EXPECT_HDR1 (if we can process the status
1825                                  * with only 2 bytes), or go to EXPECT_HDR3 to
1826                                  * get the third byte. */
1827                                 edge_serial->rxPort =
1828                                     IOSP_GET_HDR_PORT(edge_serial->rxHeader1);
1829                                 edge_serial->rxStatusCode =
1830                                     IOSP_GET_STATUS_CODE(
1831                                                 edge_serial->rxHeader1);
1832
1833                                 if (!IOSP_STATUS_IS_2BYTE(
1834                                                 edge_serial->rxStatusCode)) {
1835                                         /* This status needs additional bytes.
1836                                          * Save what we have and then wait for
1837                                          * more data.
1838                                          */
1839                                         edge_serial->rxStatusParam
1840                                                 = edge_serial->rxHeader2;
1841                                         edge_serial->rxState = EXPECT_HDR3;
1842                                         break;
1843                                 }
1844                                 /* We have all the header bytes, process the
1845                                    status now */
1846                                 process_rcvd_status(edge_serial,
1847                                                 edge_serial->rxHeader2, 0);
1848                                 edge_serial->rxState = EXPECT_HDR1;
1849                                 break;
1850                         } else {
1851                                 edge_serial->rxPort =
1852                                     IOSP_GET_HDR_PORT(edge_serial->rxHeader1);
1853                                 edge_serial->rxBytesRemaining =
1854                                     IOSP_GET_HDR_DATA_LEN(
1855                                                 edge_serial->rxHeader1,
1856                                                 edge_serial->rxHeader2);
1857                                 dbg("%s - Data for Port %u Len %u",
1858                                                 __func__,
1859                                                 edge_serial->rxPort,
1860                                                 edge_serial->rxBytesRemaining);
1861
1862                                 /* ASSERT(DevExt->RxPort < DevExt->NumPorts);
1863                                  * ASSERT(DevExt->RxBytesRemaining <
1864                                  *              IOSP_MAX_DATA_LENGTH);
1865                                  */
1866
1867                                 if (bufferLength == 0) {
1868                                         edge_serial->rxState = EXPECT_DATA;
1869                                         break;
1870                                 }
1871                                 /* Else, drop through */
1872                         }
1873                 case EXPECT_DATA: /* Expect data */
1874                         if (bufferLength < edge_serial->rxBytesRemaining) {
1875                                 rxLen = bufferLength;
1876                                 /* Expect data to start next buffer */
1877                                 edge_serial->rxState = EXPECT_DATA;
1878                         } else {
1879                                 /* BufLen >= RxBytesRemaining */
1880                                 rxLen = edge_serial->rxBytesRemaining;
1881                                 /* Start another header next time */
1882                                 edge_serial->rxState = EXPECT_HDR1;
1883                         }
1884
1885                         bufferLength -= rxLen;
1886                         edge_serial->rxBytesRemaining -= rxLen;
1887
1888                         /* spit this data back into the tty driver if this
1889                            port is open */
1890                         if (rxLen) {
1891                                 port = edge_serial->serial->port[
1892                                                         edge_serial->rxPort];
1893                                 edge_port = usb_get_serial_port_data(port);
1894                                 if (edge_port->open) {
1895                                         tty = tty_port_tty_get(
1896                                                 &edge_port->port->port);
1897                                         if (tty) {
1898                                                 dbg("%s - Sending %d bytes to TTY for port %d",
1899                                                         __func__, rxLen, edge_serial->rxPort);
1900                                                 edge_tty_recv(&edge_serial->serial->dev->dev, tty, buffer, rxLen);
1901                                                 tty_kref_put(tty);
1902                                         }
1903                                         edge_port->icount.rx += rxLen;
1904                                 }
1905                                 buffer += rxLen;
1906                         }
1907                         break;
1908
1909                 case EXPECT_HDR3:       /* Expect 3rd byte of status header */
1910                         edge_serial->rxHeader3 = *buffer;
1911                         ++buffer;
1912                         --bufferLength;
1913
1914                         /* We have all the header bytes, process the
1915                            status now */
1916                         process_rcvd_status(edge_serial,
1917                                 edge_serial->rxStatusParam,
1918                                 edge_serial->rxHeader3);
1919                         edge_serial->rxState = EXPECT_HDR1;
1920                         break;
1921                 }
1922         }
1923 }
1924
1925
1926 /*****************************************************************************
1927  * process_rcvd_status
1928  *      this function handles the any status messages received on the
1929  *      bulk in pipe.
1930  *****************************************************************************/
1931 static void process_rcvd_status(struct edgeport_serial *edge_serial,
1932                                                 __u8 byte2, __u8 byte3)
1933 {
1934         struct usb_serial_port *port;
1935         struct edgeport_port *edge_port;
1936         struct tty_struct *tty;
1937         __u8 code = edge_serial->rxStatusCode;
1938
1939         /* switch the port pointer to the one being currently talked about */
1940         port = edge_serial->serial->port[edge_serial->rxPort];
1941         edge_port = usb_get_serial_port_data(port);
1942         if (edge_port == NULL) {
1943                 dev_err(&edge_serial->serial->dev->dev,
1944                         "%s - edge_port == NULL for port %d\n",
1945                                         __func__, edge_serial->rxPort);
1946                 return;
1947         }
1948
1949         dbg("%s - port %d", __func__, edge_serial->rxPort);
1950
1951         if (code == IOSP_EXT_STATUS) {
1952                 switch (byte2) {
1953                 case IOSP_EXT_STATUS_CHASE_RSP:
1954                         /* we want to do EXT status regardless of port
1955                          * open/closed */
1956                         dbg("%s - Port %u EXT CHASE_RSP Data = %02x",
1957                                         __func__, edge_serial->rxPort, byte3);
1958                         /* Currently, the only EXT_STATUS is Chase, so process
1959                          * here instead of one more call to one more subroutine
1960                          * If/when more EXT_STATUS, there'll be more work to do
1961                          * Also, we currently clear flag and close the port
1962                          * regardless of content of above's Byte3.
1963                          * We could choose to do something else when Byte3 says
1964                          * Timeout on Chase from Edgeport, like wait longer in
1965                          * block_until_chase_response, but for now we don't.
1966                          */
1967                         edge_port->chaseResponsePending = false;
1968                         wake_up(&edge_port->wait_chase);
1969                         return;
1970
1971                 case IOSP_EXT_STATUS_RX_CHECK_RSP:
1972                         dbg("%s ========== Port %u CHECK_RSP Sequence = %02x =============", __func__, edge_serial->rxPort, byte3);
1973                         /* Port->RxCheckRsp = true; */
1974                         return;
1975                 }
1976         }
1977
1978         if (code == IOSP_STATUS_OPEN_RSP) {
1979                 edge_port->txCredits = GET_TX_BUFFER_SIZE(byte3);
1980                 edge_port->maxTxCredits = edge_port->txCredits;
1981                 dbg("%s - Port %u Open Response Initial MSR = %02x TxBufferSize = %d", __func__, edge_serial->rxPort, byte2, edge_port->txCredits);
1982                 handle_new_msr(edge_port, byte2);
1983
1984                 /* send the current line settings to the port so we are
1985                    in sync with any further termios calls */
1986                 tty = tty_port_tty_get(&edge_port->port->port);
1987                 if (tty) {
1988                         change_port_settings(tty,
1989                                 edge_port, tty->termios);
1990                         tty_kref_put(tty);
1991                 }
1992
1993                 /* we have completed the open */
1994                 edge_port->openPending = false;
1995                 edge_port->open = true;
1996                 wake_up(&edge_port->wait_open);
1997                 return;
1998         }
1999
2000         /* If port is closed, silently discard all rcvd status. We can
2001          * have cases where buffered status is received AFTER the close
2002          * port command is sent to the Edgeport.
2003          */
2004         if (!edge_port->open || edge_port->closePending)
2005                 return;
2006
2007         switch (code) {
2008         /* Not currently sent by Edgeport */
2009         case IOSP_STATUS_LSR:
2010                 dbg("%s - Port %u LSR Status = %02x",
2011                                         __func__, edge_serial->rxPort, byte2);
2012                 handle_new_lsr(edge_port, false, byte2, 0);
2013                 break;
2014
2015         case IOSP_STATUS_LSR_DATA:
2016                 dbg("%s - Port %u LSR Status = %02x, Data = %02x",
2017                                 __func__, edge_serial->rxPort, byte2, byte3);
2018                 /* byte2 is LSR Register */
2019                 /* byte3 is broken data byte */
2020                 handle_new_lsr(edge_port, true, byte2, byte3);
2021                 break;
2022         /*
2023          *      case IOSP_EXT_4_STATUS:
2024          *              dbg("%s - Port %u LSR Status = %02x Data = %02x",
2025          *                      __func__, edge_serial->rxPort, byte2, byte3);
2026          *              break;
2027          */
2028         case IOSP_STATUS_MSR:
2029                 dbg("%s - Port %u MSR Status = %02x",
2030                                         __func__, edge_serial->rxPort, byte2);
2031                 /*
2032                  * Process this new modem status and generate appropriate
2033                  * events, etc, based on the new status. This routine
2034                  * also saves the MSR in Port->ShadowMsr.
2035                  */
2036                 handle_new_msr(edge_port, byte2);
2037                 break;
2038
2039         default:
2040                 dbg("%s - Unrecognized IOSP status code %u", __func__, code);
2041                 break;
2042         }
2043 }
2044
2045
2046 /*****************************************************************************
2047  * edge_tty_recv
2048  *      this function passes data on to the tty flip buffer
2049  *****************************************************************************/
2050 static void edge_tty_recv(struct device *dev, struct tty_struct *tty,
2051                                         unsigned char *data, int length)
2052 {
2053         int cnt;
2054
2055         cnt = tty_insert_flip_string(tty, data, length);
2056         if (cnt < length) {
2057                 dev_err(dev, "%s - dropping data, %d bytes lost\n",
2058                                 __func__, length - cnt);
2059         }
2060         data += cnt;
2061         length -= cnt;
2062
2063         tty_flip_buffer_push(tty);
2064 }
2065
2066
2067 /*****************************************************************************
2068  * handle_new_msr
2069  *      this function handles any change to the msr register for a port.
2070  *****************************************************************************/
2071 static void handle_new_msr(struct edgeport_port *edge_port, __u8 newMsr)
2072 {
2073         struct  async_icount *icount;
2074
2075         dbg("%s %02x", __func__, newMsr);
2076
2077         if (newMsr & (EDGEPORT_MSR_DELTA_CTS | EDGEPORT_MSR_DELTA_DSR |
2078                         EDGEPORT_MSR_DELTA_RI | EDGEPORT_MSR_DELTA_CD)) {
2079                 icount = &edge_port->icount;
2080
2081                 /* update input line counters */
2082                 if (newMsr & EDGEPORT_MSR_DELTA_CTS)
2083                         icount->cts++;
2084                 if (newMsr & EDGEPORT_MSR_DELTA_DSR)
2085                         icount->dsr++;
2086                 if (newMsr & EDGEPORT_MSR_DELTA_CD)
2087                         icount->dcd++;
2088                 if (newMsr & EDGEPORT_MSR_DELTA_RI)
2089                         icount->rng++;
2090                 wake_up_interruptible(&edge_port->delta_msr_wait);
2091         }
2092
2093         /* Save the new modem status */
2094         edge_port->shadowMSR = newMsr & 0xf0;
2095 }
2096
2097
2098 /*****************************************************************************
2099  * handle_new_lsr
2100  *      this function handles any change to the lsr register for a port.
2101  *****************************************************************************/
2102 static void handle_new_lsr(struct edgeport_port *edge_port, __u8 lsrData,
2103                                                         __u8 lsr, __u8 data)
2104 {
2105         __u8 newLsr = (__u8) (lsr & (__u8)
2106                 (LSR_OVER_ERR | LSR_PAR_ERR | LSR_FRM_ERR | LSR_BREAK));
2107         struct async_icount *icount;
2108
2109         dbg("%s - %02x", __func__, newLsr);
2110
2111         edge_port->shadowLSR = lsr;
2112
2113         if (newLsr & LSR_BREAK) {
2114                 /*
2115                  * Parity and Framing errors only count if they
2116                  * occur exclusive of a break being
2117                  * received.
2118                  */
2119                 newLsr &= (__u8)(LSR_OVER_ERR | LSR_BREAK);
2120         }
2121
2122         /* Place LSR data byte into Rx buffer */
2123         if (lsrData) {
2124                 struct tty_struct *tty =
2125                                 tty_port_tty_get(&edge_port->port->port);
2126                 if (tty) {
2127                         edge_tty_recv(&edge_port->port->dev, tty, &data, 1);
2128                         tty_kref_put(tty);
2129                 }
2130         }
2131         /* update input line counters */
2132         icount = &edge_port->icount;
2133         if (newLsr & LSR_BREAK)
2134                 icount->brk++;
2135         if (newLsr & LSR_OVER_ERR)
2136                 icount->overrun++;
2137         if (newLsr & LSR_PAR_ERR)
2138                 icount->parity++;
2139         if (newLsr & LSR_FRM_ERR)
2140                 icount->frame++;
2141 }
2142
2143
2144 /****************************************************************************
2145  * sram_write
2146  *      writes a number of bytes to the Edgeport device's sram starting at the
2147  *      given address.
2148  *      If successful returns the number of bytes written, otherwise it returns
2149  *      a negative error number of the problem.
2150  ****************************************************************************/
2151 static int sram_write(struct usb_serial *serial, __u16 extAddr, __u16 addr,
2152                                         __u16 length, const __u8 *data)
2153 {
2154         int result;
2155         __u16 current_length;
2156         unsigned char *transfer_buffer;
2157
2158         dbg("%s - %x, %x, %d", __func__, extAddr, addr, length);
2159
2160         transfer_buffer =  kmalloc(64, GFP_KERNEL);
2161         if (!transfer_buffer) {
2162                 dev_err(&serial->dev->dev, "%s - kmalloc(%d) failed.\n",
2163                                                         __func__, 64);
2164                 return -ENOMEM;
2165         }
2166
2167         /* need to split these writes up into 64 byte chunks */
2168         result = 0;
2169         while (length > 0) {
2170                 if (length > 64)
2171                         current_length = 64;
2172                 else
2173                         current_length = length;
2174
2175 /*              dbg("%s - writing %x, %x, %d", __func__,
2176                                         extAddr, addr, current_length); */
2177                 memcpy(transfer_buffer, data, current_length);
2178                 result = usb_control_msg(serial->dev,
2179                                         usb_sndctrlpipe(serial->dev, 0),
2180                                         USB_REQUEST_ION_WRITE_RAM,
2181                                         0x40, addr, extAddr, transfer_buffer,
2182                                         current_length, 300);
2183                 if (result < 0)
2184                         break;
2185                 length -= current_length;
2186                 addr += current_length;
2187                 data += current_length;
2188         }
2189
2190         kfree(transfer_buffer);
2191         return result;
2192 }
2193
2194
2195 /****************************************************************************
2196  * rom_write
2197  *      writes a number of bytes to the Edgeport device's ROM starting at the
2198  *      given address.
2199  *      If successful returns the number of bytes written, otherwise it returns
2200  *      a negative error number of the problem.
2201  ****************************************************************************/
2202 static int rom_write(struct usb_serial *serial, __u16 extAddr, __u16 addr,
2203                                         __u16 length, const __u8 *data)
2204 {
2205         int result;
2206         __u16 current_length;
2207         unsigned char *transfer_buffer;
2208
2209 /*      dbg("%s - %x, %x, %d", __func__, extAddr, addr, length); */
2210
2211         transfer_buffer =  kmalloc(64, GFP_KERNEL);
2212         if (!transfer_buffer) {
2213                 dev_err(&serial->dev->dev, "%s - kmalloc(%d) failed.\n",
2214                                                                 __func__, 64);
2215                 return -ENOMEM;
2216         }
2217
2218         /* need to split these writes up into 64 byte chunks */
2219         result = 0;
2220         while (length > 0) {
2221                 if (length > 64)
2222                         current_length = 64;
2223                 else
2224                         current_length = length;
2225 /*              dbg("%s - writing %x, %x, %d", __func__,
2226                                         extAddr, addr, current_length); */
2227                 memcpy(transfer_buffer, data, current_length);
2228                 result = usb_control_msg(serial->dev,
2229                                         usb_sndctrlpipe(serial->dev, 0),
2230                                         USB_REQUEST_ION_WRITE_ROM, 0x40,
2231                                         addr, extAddr,
2232                                         transfer_buffer, current_length, 300);
2233                 if (result < 0)
2234                         break;
2235                 length -= current_length;
2236                 addr += current_length;
2237                 data += current_length;
2238         }
2239
2240         kfree(transfer_buffer);
2241         return result;
2242 }
2243
2244
2245 /****************************************************************************
2246  * rom_read
2247  *      reads a number of bytes from the Edgeport device starting at the given
2248  *      address.
2249  *      If successful returns the number of bytes read, otherwise it returns
2250  *      a negative error number of the problem.
2251  ****************************************************************************/
2252 static int rom_read(struct usb_serial *serial, __u16 extAddr,
2253                                         __u16 addr, __u16 length, __u8 *data)
2254 {
2255         int result;
2256         __u16 current_length;
2257         unsigned char *transfer_buffer;
2258
2259         dbg("%s - %x, %x, %d", __func__, extAddr, addr, length);
2260
2261         transfer_buffer =  kmalloc(64, GFP_KERNEL);
2262         if (!transfer_buffer) {
2263                 dev_err(&serial->dev->dev,
2264                         "%s - kmalloc(%d) failed.\n", __func__, 64);
2265                 return -ENOMEM;
2266         }
2267
2268         /* need to split these reads up into 64 byte chunks */
2269         result = 0;
2270         while (length > 0) {
2271                 if (length > 64)
2272                         current_length = 64;
2273                 else
2274                         current_length = length;
2275 /*              dbg("%s - %x, %x, %d", __func__,
2276                                 extAddr, addr, current_length); */
2277                 result = usb_control_msg(serial->dev,
2278                                         usb_rcvctrlpipe(serial->dev, 0),
2279                                         USB_REQUEST_ION_READ_ROM,
2280                                         0xC0, addr, extAddr, transfer_buffer,
2281                                         current_length, 300);
2282                 if (result < 0)
2283                         break;
2284                 memcpy(data, transfer_buffer, current_length);
2285                 length -= current_length;
2286                 addr += current_length;
2287                 data += current_length;
2288         }
2289
2290         kfree(transfer_buffer);
2291         return result;
2292 }
2293
2294
2295 /****************************************************************************
2296  * send_iosp_ext_cmd
2297  *      Is used to send a IOSP message to the Edgeport device
2298  ****************************************************************************/
2299 static int send_iosp_ext_cmd(struct edgeport_port *edge_port,
2300                                                 __u8 command, __u8 param)
2301 {
2302         unsigned char   *buffer;
2303         unsigned char   *currentCommand;
2304         int             length = 0;
2305         int             status = 0;
2306
2307         dbg("%s - %d, %d", __func__, command, param);
2308
2309         buffer = kmalloc(10, GFP_ATOMIC);
2310         if (!buffer) {
2311                 dev_err(&edge_port->port->dev,
2312                                 "%s - kmalloc(%d) failed.\n", __func__, 10);
2313                 return -ENOMEM;
2314         }
2315
2316         currentCommand = buffer;
2317
2318         MAKE_CMD_EXT_CMD(&currentCommand, &length,
2319                 edge_port->port->number - edge_port->port->serial->minor,
2320                 command, param);
2321
2322         status = write_cmd_usb(edge_port, buffer, length);
2323         if (status) {
2324                 /* something bad happened, let's free up the memory */
2325                 kfree(buffer);
2326         }
2327
2328         return status;
2329 }
2330
2331
2332 /*****************************************************************************
2333  * write_cmd_usb
2334  *      this function writes the given buffer out to the bulk write endpoint.
2335  *****************************************************************************/
2336 static int write_cmd_usb(struct edgeport_port *edge_port,
2337                                         unsigned char *buffer, int length)
2338 {
2339         struct edgeport_serial *edge_serial =
2340                                 usb_get_serial_data(edge_port->port->serial);
2341         int status = 0;
2342         struct urb *urb;
2343
2344         usb_serial_debug_data(debug, &edge_port->port->dev,
2345                                                 __func__, length, buffer);
2346
2347         /* Allocate our next urb */
2348         urb = usb_alloc_urb(0, GFP_ATOMIC);
2349         if (!urb)
2350                 return -ENOMEM;
2351
2352         atomic_inc(&CmdUrbs);
2353         dbg("%s - ALLOCATE URB %p (outstanding %d)",
2354                                 __func__, urb, atomic_read(&CmdUrbs));
2355
2356         usb_fill_bulk_urb(urb, edge_serial->serial->dev,
2357                         usb_sndbulkpipe(edge_serial->serial->dev,
2358                                         edge_serial->bulk_out_endpoint),
2359                         buffer, length, edge_bulk_out_cmd_callback, edge_port);
2360
2361         edge_port->commandPending = true;
2362         status = usb_submit_urb(urb, GFP_ATOMIC);
2363
2364         if (status) {
2365                 /* something went wrong */
2366                 dev_err(&edge_port->port->dev,
2367                     "%s - usb_submit_urb(write command) failed, status = %d\n",
2368                                                         __func__, status);
2369                 usb_kill_urb(urb);
2370                 usb_free_urb(urb);
2371                 atomic_dec(&CmdUrbs);
2372                 return status;
2373         }
2374
2375 #if 0
2376         wait_event(&edge_port->wait_command, !edge_port->commandPending);
2377
2378         if (edge_port->commandPending) {
2379                 /* command timed out */
2380                 dbg("%s - command timed out", __func__);
2381                 status = -EINVAL;
2382         }
2383 #endif
2384         return status;
2385 }
2386
2387
2388 /*****************************************************************************
2389  * send_cmd_write_baud_rate
2390  *      this function sends the proper command to change the baud rate of the
2391  *      specified port.
2392  *****************************************************************************/
2393 static int send_cmd_write_baud_rate(struct edgeport_port *edge_port,
2394                                                                 int baudRate)
2395 {
2396         struct edgeport_serial *edge_serial =
2397                                 usb_get_serial_data(edge_port->port->serial);
2398         unsigned char *cmdBuffer;
2399         unsigned char *currCmd;
2400         int cmdLen = 0;
2401         int divisor;
2402         int status;
2403         unsigned char number =
2404                 edge_port->port->number - edge_port->port->serial->minor;
2405
2406         if (edge_serial->is_epic &&
2407             !edge_serial->epic_descriptor.Supports.IOSPSetBaudRate) {
2408                 dbg("SendCmdWriteBaudRate - NOT Setting baud rate for port = %d, baud = %d",
2409                     edge_port->port->number, baudRate);
2410                 return 0;
2411         }
2412
2413         dbg("%s - port = %d, baud = %d", __func__,
2414                                         edge_port->port->number, baudRate);
2415
2416         status = calc_baud_rate_divisor(baudRate, &divisor);
2417         if (status) {
2418                 dev_err(&edge_port->port->dev, "%s - bad baud rate\n",
2419                                                                 __func__);
2420                 return status;
2421         }
2422
2423         /* Alloc memory for the string of commands. */
2424         cmdBuffer =  kmalloc(0x100, GFP_ATOMIC);
2425         if (!cmdBuffer) {
2426                 dev_err(&edge_port->port->dev,
2427                         "%s - kmalloc(%d) failed.\n", __func__, 0x100);
2428                 return -ENOMEM;
2429         }
2430         currCmd = cmdBuffer;
2431
2432         /* Enable access to divisor latch */
2433         MAKE_CMD_WRITE_REG(&currCmd, &cmdLen, number, LCR, LCR_DL_ENABLE);
2434
2435         /* Write the divisor itself */
2436         MAKE_CMD_WRITE_REG(&currCmd, &cmdLen, number, DLL, LOW8(divisor));
2437         MAKE_CMD_WRITE_REG(&currCmd, &cmdLen, number, DLM, HIGH8(divisor));
2438
2439         /* Restore original value to disable access to divisor latch */
2440         MAKE_CMD_WRITE_REG(&currCmd, &cmdLen, number, LCR,
2441                                                 edge_port->shadowLCR);
2442
2443         status = write_cmd_usb(edge_port, cmdBuffer, cmdLen);
2444         if (status) {
2445                 /* something bad happened, let's free up the memory */
2446                 kfree(cmdBuffer);
2447         }
2448
2449         return status;
2450 }
2451
2452
2453 /*****************************************************************************
2454  * calc_baud_rate_divisor
2455  *      this function calculates the proper baud rate divisor for the specified
2456  *      baud rate.
2457  *****************************************************************************/
2458 static int calc_baud_rate_divisor(int baudrate, int *divisor)
2459 {
2460         int i;
2461         __u16 custom;
2462
2463
2464         dbg("%s - %d", __func__, baudrate);
2465
2466         for (i = 0; i < ARRAY_SIZE(divisor_table); i++) {
2467                 if (divisor_table[i].BaudRate == baudrate) {
2468                         *divisor = divisor_table[i].Divisor;
2469                         return 0;
2470                 }
2471         }
2472
2473         /* We have tried all of the standard baud rates
2474          * lets try to calculate the divisor for this baud rate
2475          * Make sure the baud rate is reasonable */
2476         if (baudrate > 50 && baudrate < 230400) {
2477                 /* get divisor */
2478                 custom = (__u16)((230400L + baudrate/2) / baudrate);
2479
2480                 *divisor = custom;
2481
2482                 dbg("%s - Baud %d = %d", __func__, baudrate, custom);
2483                 return 0;
2484         }
2485
2486         return -1;
2487 }
2488
2489
2490 /*****************************************************************************
2491  * send_cmd_write_uart_register
2492  *  this function builds up a uart register message and sends to the device.
2493  *****************************************************************************/
2494 static int send_cmd_write_uart_register(struct edgeport_port *edge_port,
2495                                                 __u8 regNum, __u8 regValue)
2496 {
2497         struct edgeport_serial *edge_serial =
2498                                 usb_get_serial_data(edge_port->port->serial);
2499         unsigned char *cmdBuffer;
2500         unsigned char *currCmd;
2501         unsigned long cmdLen = 0;
2502         int status;
2503
2504         dbg("%s - write to %s register 0x%02x",
2505                         (regNum == MCR) ? "MCR" : "LCR", __func__, regValue);
2506
2507         if (edge_serial->is_epic &&
2508             !edge_serial->epic_descriptor.Supports.IOSPWriteMCR &&
2509             regNum == MCR) {
2510                 dbg("SendCmdWriteUartReg - Not writing to MCR Register");
2511                 return 0;
2512         }
2513
2514         if (edge_serial->is_epic &&
2515             !edge_serial->epic_descriptor.Supports.IOSPWriteLCR &&
2516             regNum == LCR) {
2517                 dbg("SendCmdWriteUartReg - Not writing to LCR Register");
2518                 return 0;
2519         }
2520
2521         /* Alloc memory for the string of commands. */
2522         cmdBuffer = kmalloc(0x10, GFP_ATOMIC);
2523         if (cmdBuffer == NULL)
2524                 return -ENOMEM;
2525
2526         currCmd = cmdBuffer;
2527
2528         /* Build a cmd in the buffer to write the given register */
2529         MAKE_CMD_WRITE_REG(&currCmd, &cmdLen,
2530                 edge_port->port->number - edge_port->port->serial->minor,
2531                 regNum, regValue);
2532
2533         status = write_cmd_usb(edge_port, cmdBuffer, cmdLen);
2534         if (status) {
2535                 /* something bad happened, let's free up the memory */
2536                 kfree(cmdBuffer);
2537         }
2538
2539         return status;
2540 }
2541
2542
2543 /*****************************************************************************
2544  * change_port_settings
2545  *      This routine is called to set the UART on the device to match the
2546  *      specified new settings.
2547  *****************************************************************************/
2548
2549 static void change_port_settings(struct tty_struct *tty,
2550         struct edgeport_port *edge_port, struct ktermios *old_termios)
2551 {
2552         struct edgeport_serial *edge_serial =
2553                         usb_get_serial_data(edge_port->port->serial);
2554         int baud;
2555         unsigned cflag;
2556         __u8 mask = 0xff;
2557         __u8 lData;
2558         __u8 lParity;
2559         __u8 lStop;
2560         __u8 rxFlow;
2561         __u8 txFlow;
2562         int status;
2563
2564         dbg("%s - port %d", __func__, edge_port->port->number);
2565
2566         if (!edge_port->open &&
2567             !edge_port->openPending) {
2568                 dbg("%s - port not opened", __func__);
2569                 return;
2570         }
2571
2572         cflag = tty->termios->c_cflag;
2573
2574         switch (cflag & CSIZE) {
2575         case CS5:
2576                 lData = LCR_BITS_5; mask = 0x1f;
2577                 dbg("%s - data bits = 5", __func__);
2578                 break;
2579         case CS6:
2580                 lData = LCR_BITS_6; mask = 0x3f;
2581                 dbg("%s - data bits = 6", __func__);
2582                 break;
2583         case CS7:
2584                 lData = LCR_BITS_7; mask = 0x7f;
2585                 dbg("%s - data bits = 7", __func__);
2586                 break;
2587         default:
2588         case CS8:
2589                 lData = LCR_BITS_8;
2590                 dbg("%s - data bits = 8", __func__);
2591                 break;
2592         }
2593
2594         lParity = LCR_PAR_NONE;
2595         if (cflag & PARENB) {
2596                 if (cflag & CMSPAR) {
2597                         if (cflag & PARODD) {
2598                                 lParity = LCR_PAR_MARK;
2599                                 dbg("%s - parity = mark", __func__);
2600                         } else {
2601                                 lParity = LCR_PAR_SPACE;
2602                                 dbg("%s - parity = space", __func__);
2603                         }
2604                 } else if (cflag & PARODD) {
2605                         lParity = LCR_PAR_ODD;
2606                         dbg("%s - parity = odd", __func__);
2607                 } else {
2608                         lParity = LCR_PAR_EVEN;
2609                         dbg("%s - parity = even", __func__);
2610                 }
2611         } else {
2612                 dbg("%s - parity = none", __func__);
2613         }
2614
2615         if (cflag & CSTOPB) {
2616                 lStop = LCR_STOP_2;
2617                 dbg("%s - stop bits = 2", __func__);
2618         } else {
2619                 lStop = LCR_STOP_1;
2620                 dbg("%s - stop bits = 1", __func__);
2621         }
2622
2623         /* figure out the flow control settings */
2624         rxFlow = txFlow = 0x00;
2625         if (cflag & CRTSCTS) {
2626                 rxFlow |= IOSP_RX_FLOW_RTS;
2627                 txFlow |= IOSP_TX_FLOW_CTS;
2628                 dbg("%s - RTS/CTS is enabled", __func__);
2629         } else {
2630                 dbg("%s - RTS/CTS is disabled", __func__);
2631         }
2632
2633         /* if we are implementing XON/XOFF, set the start and stop character
2634            in the device */
2635         if (I_IXOFF(tty) || I_IXON(tty)) {
2636                 unsigned char stop_char  = STOP_CHAR(tty);
2637                 unsigned char start_char = START_CHAR(tty);
2638
2639                 if ((!edge_serial->is_epic) ||
2640                     ((edge_serial->is_epic) &&
2641                      (edge_serial->epic_descriptor.Supports.IOSPSetXChar))) {
2642                         send_iosp_ext_cmd(edge_port,
2643                                         IOSP_CMD_SET_XON_CHAR, start_char);
2644                         send_iosp_ext_cmd(edge_port,
2645                                         IOSP_CMD_SET_XOFF_CHAR, stop_char);
2646                 }
2647
2648                 /* if we are implementing INBOUND XON/XOFF */
2649                 if (I_IXOFF(tty)) {
2650                         rxFlow |= IOSP_RX_FLOW_XON_XOFF;
2651                         dbg("%s - INBOUND XON/XOFF is enabled, XON = %2x, XOFF = %2x",
2652                                         __func__, start_char, stop_char);
2653                 } else {
2654                         dbg("%s - INBOUND XON/XOFF is disabled", __func__);
2655                 }
2656
2657                 /* if we are implementing OUTBOUND XON/XOFF */
2658                 if (I_IXON(tty)) {
2659                         txFlow |= IOSP_TX_FLOW_XON_XOFF;
2660                         dbg("%s - OUTBOUND XON/XOFF is enabled, XON = %2x, XOFF = %2x",
2661                                         __func__, start_char, stop_char);
2662                 } else {
2663                         dbg("%s - OUTBOUND XON/XOFF is disabled", __func__);
2664                 }
2665         }
2666
2667         /* Set flow control to the configured value */
2668         if ((!edge_serial->is_epic) ||
2669             ((edge_serial->is_epic) &&
2670              (edge_serial->epic_descriptor.Supports.IOSPSetRxFlow)))
2671                 send_iosp_ext_cmd(edge_port, IOSP_CMD_SET_RX_FLOW, rxFlow);
2672         if ((!edge_serial->is_epic) ||
2673             ((edge_serial->is_epic) &&
2674              (edge_serial->epic_descriptor.Supports.IOSPSetTxFlow)))
2675                 send_iosp_ext_cmd(edge_port, IOSP_CMD_SET_TX_FLOW, txFlow);
2676
2677
2678         edge_port->shadowLCR &= ~(LCR_BITS_MASK | LCR_STOP_MASK | LCR_PAR_MASK);
2679         edge_port->shadowLCR |= (lData | lParity | lStop);
2680
2681         edge_port->validDataMask = mask;
2682
2683         /* Send the updated LCR value to the EdgePort */
2684         status = send_cmd_write_uart_register(edge_port, LCR,
2685                                                         edge_port->shadowLCR);
2686         if (status != 0)
2687                 return;
2688
2689         /* set up the MCR register and send it to the EdgePort */
2690         edge_port->shadowMCR = MCR_MASTER_IE;
2691         if (cflag & CBAUD)
2692                 edge_port->shadowMCR |= (MCR_DTR | MCR_RTS);
2693
2694         status = send_cmd_write_uart_register(edge_port, MCR,
2695                                                 edge_port->shadowMCR);
2696         if (status != 0)
2697                 return;
2698
2699         /* Determine divisor based on baud rate */
2700         baud = tty_get_baud_rate(tty);
2701         if (!baud) {
2702                 /* pick a default, any default... */
2703                 baud = 9600;
2704         }
2705
2706         dbg("%s - baud rate = %d", __func__, baud);
2707         status = send_cmd_write_baud_rate(edge_port, baud);
2708         if (status == -1) {
2709                 /* Speed change was not possible - put back the old speed */
2710                 baud = tty_termios_baud_rate(old_termios);
2711                 tty_encode_baud_rate(tty, baud, baud);
2712         }
2713 }
2714
2715
2716 /****************************************************************************
2717  * unicode_to_ascii
2718  *      Turns a string from Unicode into ASCII.
2719  *      Doesn't do a good job with any characters that are outside the normal
2720  *      ASCII range, but it's only for debugging...
2721  *      NOTE: expects the unicode in LE format
2722  ****************************************************************************/
2723 static void unicode_to_ascii(char *string, int buflen,
2724                                         __le16 *unicode, int unicode_size)
2725 {
2726         int i;
2727
2728         if (buflen <= 0)        /* never happens, but... */
2729                 return;
2730         --buflen;               /* space for nul */
2731
2732         for (i = 0; i < unicode_size; i++) {
2733                 if (i >= buflen)
2734                         break;
2735                 string[i] = (char)(le16_to_cpu(unicode[i]));
2736         }
2737         string[i] = 0x00;
2738 }
2739
2740
2741 /****************************************************************************
2742  * get_manufacturing_desc
2743  *      reads in the manufacturing descriptor and stores it into the serial
2744  *      structure.
2745  ****************************************************************************/
2746 static void get_manufacturing_desc(struct edgeport_serial *edge_serial)
2747 {
2748         int response;
2749
2750         dbg("getting manufacturer descriptor");
2751
2752         response = rom_read(edge_serial->serial,
2753                                 (EDGE_MANUF_DESC_ADDR & 0xffff0000) >> 16,
2754                                 (__u16)(EDGE_MANUF_DESC_ADDR & 0x0000ffff),
2755                                 EDGE_MANUF_DESC_LEN,
2756                                 (__u8 *)(&edge_serial->manuf_descriptor));
2757
2758         if (response < 1)
2759                 dev_err(&edge_serial->serial->dev->dev,
2760                         "error in getting manufacturer descriptor\n");
2761         else {
2762                 char string[30];
2763                 dbg("**Manufacturer Descriptor");
2764                 dbg("  RomSize:        %dK",
2765                         edge_serial->manuf_descriptor.RomSize);
2766                 dbg("  RamSize:        %dK",
2767                         edge_serial->manuf_descriptor.RamSize);
2768                 dbg("  CpuRev:         %d",
2769                         edge_serial->manuf_descriptor.CpuRev);
2770                 dbg("  BoardRev:       %d",
2771                         edge_serial->manuf_descriptor.BoardRev);
2772                 dbg("  NumPorts:       %d",
2773                         edge_serial->manuf_descriptor.NumPorts);
2774                 dbg("  DescDate:       %d/%d/%d",
2775                         edge_serial->manuf_descriptor.DescDate[0],
2776                         edge_serial->manuf_descriptor.DescDate[1],
2777                         edge_serial->manuf_descriptor.DescDate[2]+1900);
2778                 unicode_to_ascii(string, sizeof(string),
2779                         edge_serial->manuf_descriptor.SerialNumber,
2780                         edge_serial->manuf_descriptor.SerNumLength/2);
2781                 dbg("  SerialNumber: %s", string);
2782                 unicode_to_ascii(string, sizeof(string),
2783                         edge_serial->manuf_descriptor.AssemblyNumber,
2784                         edge_serial->manuf_descriptor.AssemblyNumLength/2);
2785                 dbg("  AssemblyNumber: %s", string);
2786                 unicode_to_ascii(string, sizeof(string),
2787                     edge_serial->manuf_descriptor.OemAssyNumber,
2788                     edge_serial->manuf_descriptor.OemAssyNumLength/2);
2789                 dbg("  OemAssyNumber:  %s", string);
2790                 dbg("  UartType:       %d",
2791                         edge_serial->manuf_descriptor.UartType);
2792                 dbg("  IonPid:         %d",
2793                         edge_serial->manuf_descriptor.IonPid);
2794                 dbg("  IonConfig:      %d",
2795                         edge_serial->manuf_descriptor.IonConfig);
2796         }
2797 }
2798
2799
2800 /****************************************************************************
2801  * get_boot_desc
2802  *      reads in the bootloader descriptor and stores it into the serial
2803  *      structure.
2804  ****************************************************************************/
2805 static void get_boot_desc(struct edgeport_serial *edge_serial)
2806 {
2807         int response;
2808
2809         dbg("getting boot descriptor");
2810
2811         response = rom_read(edge_serial->serial,
2812                                 (EDGE_BOOT_DESC_ADDR & 0xffff0000) >> 16,
2813                                 (__u16)(EDGE_BOOT_DESC_ADDR & 0x0000ffff),
2814                                 EDGE_BOOT_DESC_LEN,
2815                                 (__u8 *)(&edge_serial->boot_descriptor));
2816
2817         if (response < 1)
2818                 dev_err(&edge_serial->serial->dev->dev,
2819                                 "error in getting boot descriptor\n");
2820         else {
2821                 dbg("**Boot Descriptor:");
2822                 dbg("  BootCodeLength: %d",
2823                     le16_to_cpu(edge_serial->boot_descriptor.BootCodeLength));
2824                 dbg("  MajorVersion:   %d",
2825                         edge_serial->boot_descriptor.MajorVersion);
2826                 dbg("  MinorVersion:   %d",
2827                         edge_serial->boot_descriptor.MinorVersion);
2828                 dbg("  BuildNumber:    %d",
2829                         le16_to_cpu(edge_serial->boot_descriptor.BuildNumber));
2830                 dbg("  Capabilities:   0x%x",
2831                       le16_to_cpu(edge_serial->boot_descriptor.Capabilities));
2832                 dbg("  UConfig0:       %d",
2833                         edge_serial->boot_descriptor.UConfig0);
2834                 dbg("  UConfig1:       %d",
2835                         edge_serial->boot_descriptor.UConfig1);
2836         }
2837 }
2838
2839
2840 /****************************************************************************
2841  * load_application_firmware
2842  *      This is called to load the application firmware to the device
2843  ****************************************************************************/
2844 static void load_application_firmware(struct edgeport_serial *edge_serial)
2845 {
2846         const struct ihex_binrec *rec;
2847         const struct firmware *fw;
2848         const char *fw_name;
2849         const char *fw_info;
2850         int response;
2851         __u32 Operaddr;
2852         __u16 build;
2853
2854         switch (edge_serial->product_info.iDownloadFile) {
2855                 case EDGE_DOWNLOAD_FILE_I930:
2856                         fw_info = "downloading firmware version (930)";
2857                         fw_name = "edgeport/down.fw";
2858                         break;
2859
2860                 case EDGE_DOWNLOAD_FILE_80251:
2861                         fw_info = "downloading firmware version (80251)";
2862                         fw_name = "edgeport/down2.fw";
2863                         break;
2864
2865                 case EDGE_DOWNLOAD_FILE_NONE:
2866                         dbg("No download file specified, skipping download");
2867                         return;
2868
2869                 default:
2870                         return;
2871         }
2872
2873         response = request_ihex_firmware(&fw, fw_name,
2874                                     &edge_serial->serial->dev->dev);
2875         if (response) {
2876                 printk(KERN_ERR "Failed to load image \"%s\" err %d\n",
2877                        fw_name, response);
2878                 return;
2879         }
2880
2881         rec = (const struct ihex_binrec *)fw->data;
2882         build = (rec->data[2] << 8) | rec->data[3];
2883
2884         dbg("%s %d.%d.%d", fw_info, rec->data[0], rec->data[1], build);
2885
2886         edge_serial->product_info.FirmwareMajorVersion = rec->data[0];
2887         edge_serial->product_info.FirmwareMinorVersion = rec->data[1];
2888         edge_serial->product_info.FirmwareBuildNumber = cpu_to_le16(build);
2889
2890         for (rec = ihex_next_binrec(rec); rec;
2891              rec = ihex_next_binrec(rec)) {
2892                 Operaddr = be32_to_cpu(rec->addr);
2893                 response = sram_write(edge_serial->serial,
2894                                      Operaddr >> 16,
2895                                      Operaddr & 0xFFFF,
2896                                      be16_to_cpu(rec->len),
2897                                      &rec->data[0]);
2898                 if (response < 0) {
2899                         dev_err(&edge_serial->serial->dev->dev,
2900                                 "sram_write failed (%x, %x, %d)\n",
2901                                 Operaddr >> 16, Operaddr & 0xFFFF,
2902                                 be16_to_cpu(rec->len));
2903                         break;
2904                 }
2905         }
2906
2907         dbg("sending exec_dl_code");
2908         response = usb_control_msg (edge_serial->serial->dev,
2909                                     usb_sndctrlpipe(edge_serial->serial->dev, 0),
2910                                     USB_REQUEST_ION_EXEC_DL_CODE,
2911                                     0x40, 0x4000, 0x0001, NULL, 0, 3000);
2912
2913         release_firmware(fw);
2914 }
2915
2916
2917 /****************************************************************************
2918  * edge_startup
2919  ****************************************************************************/
2920 static int edge_startup(struct usb_serial *serial)
2921 {
2922         struct edgeport_serial *edge_serial;
2923         struct edgeport_port *edge_port;
2924         struct usb_device *dev;
2925         int i, j;
2926         int response;
2927         bool interrupt_in_found;
2928         bool bulk_in_found;
2929         bool bulk_out_found;
2930         static __u32 descriptor[3] = {  EDGE_COMPATIBILITY_MASK0,
2931                                         EDGE_COMPATIBILITY_MASK1,
2932                                         EDGE_COMPATIBILITY_MASK2 };
2933
2934         dev = serial->dev;
2935
2936         /* create our private serial structure */
2937         edge_serial = kzalloc(sizeof(struct edgeport_serial), GFP_KERNEL);
2938         if (edge_serial == NULL) {
2939                 dev_err(&serial->dev->dev, "%s - Out of memory\n", __func__);
2940                 return -ENOMEM;
2941         }
2942         spin_lock_init(&edge_serial->es_lock);
2943         edge_serial->serial = serial;
2944         usb_set_serial_data(serial, edge_serial);
2945
2946         /* get the name for the device from the device */
2947         i = usb_string(dev, dev->descriptor.iManufacturer,
2948             &edge_serial->name[0], MAX_NAME_LEN+1);
2949         if (i < 0)
2950                 i = 0;
2951         edge_serial->name[i++] = ' ';
2952         usb_string(dev, dev->descriptor.iProduct,
2953             &edge_serial->name[i], MAX_NAME_LEN+2 - i);
2954
2955         dev_info(&serial->dev->dev, "%s detected\n", edge_serial->name);
2956
2957         /* Read the epic descriptor */
2958         if (get_epic_descriptor(edge_serial) <= 0) {
2959                 /* memcpy descriptor to Supports structures */
2960                 memcpy(&edge_serial->epic_descriptor.Supports, descriptor,
2961                        sizeof(struct edge_compatibility_bits));
2962
2963                 /* get the manufacturing descriptor for this device */
2964                 get_manufacturing_desc(edge_serial);
2965
2966                 /* get the boot descriptor */
2967                 get_boot_desc(edge_serial);
2968
2969                 get_product_info(edge_serial);
2970         }
2971
2972         /* set the number of ports from the manufacturing description */
2973         /* serial->num_ports = serial->product_info.NumPorts; */
2974         if ((!edge_serial->is_epic) &&
2975             (edge_serial->product_info.NumPorts != serial->num_ports)) {
2976                 dev_warn(&serial->dev->dev, "Device Reported %d serial ports "
2977                          "vs. core thinking we have %d ports, email "
2978                          "greg@kroah.com this information.\n",
2979                          edge_serial->product_info.NumPorts,
2980                          serial->num_ports);
2981         }
2982
2983         dbg("%s - time 1 %ld", __func__, jiffies);
2984
2985         /* If not an EPiC device */
2986         if (!edge_serial->is_epic) {
2987                 /* now load the application firmware into this device */
2988                 load_application_firmware(edge_serial);
2989
2990                 dbg("%s - time 2 %ld", __func__, jiffies);
2991
2992                 /* Check current Edgeport EEPROM and update if necessary */
2993                 update_edgeport_E2PROM(edge_serial);
2994
2995                 dbg("%s - time 3 %ld", __func__, jiffies);
2996
2997                 /* set the configuration to use #1 */
2998 /*              dbg("set_configuration 1"); */
2999 /*              usb_set_configuration (dev, 1); */
3000         }
3001         dbg("  FirmwareMajorVersion  %d.%d.%d",
3002             edge_serial->product_info.FirmwareMajorVersion,
3003             edge_serial->product_info.FirmwareMinorVersion,
3004             le16_to_cpu(edge_serial->product_info.FirmwareBuildNumber));
3005
3006         /* we set up the pointers to the endpoints in the edge_open function,
3007          * as the structures aren't created yet. */
3008
3009         /* set up our port private structures */
3010         for (i = 0; i < serial->num_ports; ++i) {
3011                 edge_port = kzalloc(sizeof(struct edgeport_port), GFP_KERNEL);
3012                 if (edge_port == NULL) {
3013                         dev_err(&serial->dev->dev, "%s - Out of memory\n",
3014                                                                    __func__);
3015                         for (j = 0; j < i; ++j) {
3016                                 kfree(usb_get_serial_port_data(serial->port[j]));
3017                                 usb_set_serial_port_data(serial->port[j],
3018                                                                         NULL);
3019                         }
3020                         usb_set_serial_data(serial, NULL);
3021                         kfree(edge_serial);
3022                         return -ENOMEM;
3023                 }
3024                 spin_lock_init(&edge_port->ep_lock);
3025                 edge_port->port = serial->port[i];
3026                 usb_set_serial_port_data(serial->port[i], edge_port);
3027         }
3028
3029         response = 0;
3030
3031         if (edge_serial->is_epic) {
3032                 /* EPIC thing, set up our interrupt polling now and our read
3033                  * urb, so that the device knows it really is connected. */
3034                 interrupt_in_found = bulk_in_found = bulk_out_found = false;
3035                 for (i = 0; i < serial->interface->altsetting[0]
3036                                                 .desc.bNumEndpoints; ++i) {
3037                         struct usb_endpoint_descriptor *endpoint;
3038                         int buffer_size;
3039
3040                         endpoint = &serial->interface->altsetting[0].
3041                                                         endpoint[i].desc;
3042                         buffer_size = usb_endpoint_maxp(endpoint);
3043                         if (!interrupt_in_found &&
3044                             (usb_endpoint_is_int_in(endpoint))) {
3045                                 /* we found a interrupt in endpoint */
3046                                 dbg("found interrupt in");
3047
3048                                 /* not set up yet, so do it now */
3049                                 edge_serial->interrupt_read_urb =
3050                                                 usb_alloc_urb(0, GFP_KERNEL);
3051                                 if (!edge_serial->interrupt_read_urb) {
3052                                         dev_err(&dev->dev, "out of memory\n");
3053                                         return -ENOMEM;
3054                                 }
3055                                 edge_serial->interrupt_in_buffer =
3056                                         kmalloc(buffer_size, GFP_KERNEL);
3057                                 if (!edge_serial->interrupt_in_buffer) {
3058                                         dev_err(&dev->dev, "out of memory\n");
3059                                         usb_free_urb(edge_serial->interrupt_read_urb);
3060                                         return -ENOMEM;
3061                                 }
3062                                 edge_serial->interrupt_in_endpoint =
3063                                                 endpoint->bEndpointAddress;
3064
3065                                 /* set up our interrupt urb */
3066                                 usb_fill_int_urb(
3067                                         edge_serial->interrupt_read_urb,
3068                                         dev,
3069                                         usb_rcvintpipe(dev,
3070                                                 endpoint->bEndpointAddress),
3071                                         edge_serial->interrupt_in_buffer,
3072                                         buffer_size,
3073                                         edge_interrupt_callback,
3074                                         edge_serial,
3075                                         endpoint->bInterval);
3076
3077                                 interrupt_in_found = true;
3078                         }
3079
3080                         if (!bulk_in_found &&
3081                                 (usb_endpoint_is_bulk_in(endpoint))) {
3082                                 /* we found a bulk in endpoint */
3083                                 dbg("found bulk in");
3084
3085                                 /* not set up yet, so do it now */
3086                                 edge_serial->read_urb =
3087                                                 usb_alloc_urb(0, GFP_KERNEL);
3088                                 if (!edge_serial->read_urb) {
3089                                         dev_err(&dev->dev, "out of memory\n");
3090                                         return -ENOMEM;
3091                                 }
3092                                 edge_serial->bulk_in_buffer =
3093                                         kmalloc(buffer_size, GFP_KERNEL);
3094                                 if (!edge_serial->bulk_in_buffer) {
3095                                         dev_err(&dev->dev, "out of memory\n");
3096                                         usb_free_urb(edge_serial->read_urb);
3097                                         return -ENOMEM;
3098                                 }
3099                                 edge_serial->bulk_in_endpoint =
3100                                                 endpoint->bEndpointAddress;
3101
3102                                 /* set up our bulk in urb */
3103                                 usb_fill_bulk_urb(edge_serial->read_urb, dev,
3104                                         usb_rcvbulkpipe(dev,
3105                                                 endpoint->bEndpointAddress),
3106                                         edge_serial->bulk_in_buffer,
3107                                         usb_endpoint_maxp(endpoint),
3108                                         edge_bulk_in_callback,
3109                                         edge_serial);
3110                                 bulk_in_found = true;
3111                         }
3112
3113                         if (!bulk_out_found &&
3114                             (usb_endpoint_is_bulk_out(endpoint))) {
3115                                 /* we found a bulk out endpoint */
3116                                 dbg("found bulk out");
3117                                 edge_serial->bulk_out_endpoint =
3118                                                 endpoint->bEndpointAddress;
3119                                 bulk_out_found = true;
3120                         }
3121                 }
3122
3123                 if (!interrupt_in_found || !bulk_in_found || !bulk_out_found) {
3124                         dev_err(&dev->dev, "Error - the proper endpoints "
3125                                 "were not found!\n");
3126                         return -ENODEV;
3127                 }
3128
3129                 /* start interrupt read for this edgeport this interrupt will
3130                  * continue as long as the edgeport is connected */
3131                 response = usb_submit_urb(edge_serial->interrupt_read_urb,
3132                                                                 GFP_KERNEL);
3133                 if (response)
3134                         dev_err(&dev->dev,
3135                                 "%s - Error %d submitting control urb\n",
3136                                 __func__, response);
3137         }
3138         return response;
3139 }
3140
3141
3142 /****************************************************************************
3143  * edge_disconnect
3144  *      This function is called whenever the device is removed from the usb bus.
3145  ****************************************************************************/
3146 static void edge_disconnect(struct usb_serial *serial)
3147 {
3148         struct edgeport_serial *edge_serial = usb_get_serial_data(serial);
3149
3150         dbg("%s", __func__);
3151
3152         /* stop reads and writes on all ports */
3153         /* free up our endpoint stuff */
3154         if (edge_serial->is_epic) {
3155                 usb_kill_urb(edge_serial->interrupt_read_urb);
3156                 usb_free_urb(edge_serial->interrupt_read_urb);
3157                 kfree(edge_serial->interrupt_in_buffer);
3158
3159                 usb_kill_urb(edge_serial->read_urb);
3160                 usb_free_urb(edge_serial->read_urb);
3161                 kfree(edge_serial->bulk_in_buffer);
3162         }
3163 }
3164
3165
3166 /****************************************************************************
3167  * edge_release
3168  *      This function is called when the device structure is deallocated.
3169  ****************************************************************************/
3170 static void edge_release(struct usb_serial *serial)
3171 {
3172         struct edgeport_serial *edge_serial = usb_get_serial_data(serial);
3173         int i;
3174
3175         dbg("%s", __func__);
3176
3177         for (i = 0; i < serial->num_ports; ++i)
3178                 kfree(usb_get_serial_port_data(serial->port[i]));
3179
3180         kfree(edge_serial);
3181 }
3182
3183
3184 /****************************************************************************
3185  * edgeport_init
3186  *      This is called by the module subsystem, or on startup to initialize us
3187  ****************************************************************************/
3188 static int __init edgeport_init(void)
3189 {
3190         int retval;
3191
3192         retval = usb_serial_register(&edgeport_2port_device);
3193         if (retval)
3194                 goto failed_2port_device_register;
3195         retval = usb_serial_register(&edgeport_4port_device);
3196         if (retval)
3197                 goto failed_4port_device_register;
3198         retval = usb_serial_register(&edgeport_8port_device);
3199         if (retval)
3200                 goto failed_8port_device_register;
3201         retval = usb_serial_register(&epic_device);
3202         if (retval)
3203                 goto failed_epic_device_register;
3204         retval = usb_register(&io_driver);
3205         if (retval)
3206                 goto failed_usb_register;
3207         atomic_set(&CmdUrbs, 0);
3208         printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_VERSION ":"
3209                DRIVER_DESC "\n");
3210         return 0;
3211
3212 failed_usb_register:
3213         usb_serial_deregister(&epic_device);
3214 failed_epic_device_register:
3215         usb_serial_deregister(&edgeport_8port_device);
3216 failed_8port_device_register:
3217         usb_serial_deregister(&edgeport_4port_device);
3218 failed_4port_device_register:
3219         usb_serial_deregister(&edgeport_2port_device);
3220 failed_2port_device_register:
3221         return retval;
3222 }
3223
3224
3225 /****************************************************************************
3226  * edgeport_exit
3227  *      Called when the driver is about to be unloaded.
3228  ****************************************************************************/
3229 static void __exit edgeport_exit (void)
3230 {
3231         usb_deregister(&io_driver);
3232         usb_serial_deregister(&edgeport_2port_device);
3233         usb_serial_deregister(&edgeport_4port_device);
3234         usb_serial_deregister(&edgeport_8port_device);
3235         usb_serial_deregister(&epic_device);
3236 }
3237
3238 module_init(edgeport_init);
3239 module_exit(edgeport_exit);
3240
3241 /* Module information */
3242 MODULE_AUTHOR(DRIVER_AUTHOR);
3243 MODULE_DESCRIPTION(DRIVER_DESC);
3244 MODULE_LICENSE("GPL");
3245 MODULE_FIRMWARE("edgeport/boot.fw");
3246 MODULE_FIRMWARE("edgeport/boot2.fw");
3247 MODULE_FIRMWARE("edgeport/down.fw");
3248 MODULE_FIRMWARE("edgeport/down2.fw");
3249
3250 module_param(debug, bool, S_IRUGO | S_IWUSR);
3251 MODULE_PARM_DESC(debug, "Debug enabled or not");