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/slab.h>
  36 #include <linux/tty.h>
  37 #include <linux/tty_driver.h>
  38 #include <linux/tty_flip.h>
  39 #include <linux/module.h>
  40 #include <linux/spinlock.h>
  41 #include <linux/serial.h>
  42 #include <linux/ioctl.h>
  43 #include <linux/wait.h>
  44 #include <linux/firmware.h>
  45 #include <linux/ihex.h>
  46 #include <linux/uaccess.h>
  47 #include <linux/usb.h>
  48 #include <linux/usb/serial.h>
  49 #include "io_edgeport.h"
  50 #include "io_ionsp.h"           /* info for the iosp messages */
  51 #include "io_16654.h"           /* 16654 UART defines */
  52
  53 #define DRIVER_AUTHOR "Greg Kroah-Hartman <greg@kroah.com> and David Iacovelli"
  54 #define DRIVER_DESC "Edgeport USB Serial Driver"
  55
  56 #define MAX_NAME_LEN            64
  57
  58 #define OPEN_TIMEOUT            (5*HZ)          /* 5 seconds */
  59
  60 /* receive port state */
  61 enum RXSTATE {
  62         EXPECT_HDR1 = 0,    /* Expect header byte 1 */
  63         EXPECT_HDR2 = 1,    /* Expect header byte 2 */
  64         EXPECT_DATA = 2,    /* Expect 'RxBytesRemaining' data */
  65         EXPECT_HDR3 = 3,    /* Expect header byte 3 (for status hdrs only) */
  66 };
  67
  68
  69 /* Transmit Fifo
  70  * This Transmit queue is an extension of the edgeport Rx buffer.
  71  * The maximum amount of data buffered in both the edgeport
  72  * Rx buffer (maxTxCredits) and this buffer will never exceed maxTxCredits.
  73  */
  74 struct TxFifo {
  75         unsigned int    head;   /* index to head pointer (write) */
  76         unsigned int    tail;   /* index to tail pointer (read)  */
  77         unsigned int    count;  /* Bytes in queue */
  78         unsigned int    size;   /* Max size of queue (equal to Max number of TxCredits) */
  79         unsigned char   *fifo;  /* allocated Buffer */
  80 };
  81
  82 /* This structure holds all of the local port information */
  83 struct edgeport_port {
  84         __u16                   txCredits;              /* our current credits for this port */
  85         __u16                   maxTxCredits;           /* the max size of the port */
  86
  87         struct TxFifo           txfifo;                 /* transmit fifo -- size will be maxTxCredits */
  88         struct urb              *write_urb;             /* write URB for this port */
  89         bool                    write_in_progress;      /* 'true' while a write URB is outstanding */
  90         spinlock_t              ep_lock;
  91
  92         __u8                    shadowLCR;              /* last LCR value received */
  93         __u8                    shadowMCR;              /* last MCR value received */
  94         __u8                    shadowMSR;              /* last MSR value received */
  95         __u8                    shadowLSR;              /* last LSR value received */
  96         __u8                    shadowXonChar;          /* last value set as XON char in Edgeport */
  97         __u8                    shadowXoffChar;         /* last value set as XOFF char in Edgeport */
  98         __u8                    validDataMask;
  99         __u32                   baudRate;
 100
 101         bool                    open;
 102         bool                    openPending;
 103         bool                    commandPending;
 104         bool                    closePending;
 105         bool                    chaseResponsePending;
 106
 107         wait_queue_head_t       wait_chase;             /* for handling sleeping while waiting for chase to finish */
 108         wait_queue_head_t       wait_open;              /* for handling sleeping while waiting for open to finish */
 109         wait_queue_head_t       wait_command;           /* for handling sleeping while waiting for command to finish */
 110
 111         struct usb_serial_port  *port;                  /* loop back to the owner of this object */
 112 };
 113
 114
 115 /* This structure holds all of the individual device information */
 116 struct edgeport_serial {
 117         char                    name[MAX_NAME_LEN+2];           /* string name of this device */
 118
 119         struct edge_manuf_descriptor    manuf_descriptor;       /* the manufacturer descriptor */
 120         struct edge_boot_descriptor     boot_descriptor;        /* the boot firmware descriptor */
 121         struct edgeport_product_info    product_info;           /* Product Info */
 122         struct edge_compatibility_descriptor epic_descriptor;   /* Edgeport compatible descriptor */
 123         int                     is_epic;                        /* flag if EPiC device or not */
 124
 125         __u8                    interrupt_in_endpoint;          /* the interrupt endpoint handle */
 126         unsigned char           *interrupt_in_buffer;           /* the buffer we use for the interrupt endpoint */
 127         struct urb              *interrupt_read_urb;            /* our interrupt urb */
 128
 129         __u8                    bulk_in_endpoint;               /* the bulk in endpoint handle */
 130         unsigned char           *bulk_in_buffer;                /* the buffer we use for the bulk in endpoint */
 131         struct urb              *read_urb;                      /* our bulk read urb */
 132         bool                    read_in_progress;
 133         spinlock_t              es_lock;
 134
 135         __u8                    bulk_out_endpoint;              /* the bulk out endpoint handle */
 136
 137         __s16                   rxBytesAvail;                   /* the number of bytes that we need to read from this device */
 138
 139         enum RXSTATE            rxState;                        /* the current state of the bulk receive processor */
 140         __u8                    rxHeader1;                      /* receive header byte 1 */
 141         __u8                    rxHeader2;                      /* receive header byte 2 */
 142         __u8                    rxHeader3;                      /* receive header byte 3 */
 143         __u8                    rxPort;                         /* the port that we are currently receiving data for */
 144         __u8                    rxStatusCode;                   /* the receive status code */
 145         __u8                    rxStatusParam;                  /* the receive status paramater */
 146         __s16                   rxBytesRemaining;               /* the number of port bytes left to read */
 147         struct usb_serial       *serial;                        /* loop back to the owner of this object */
 148 };
 149
 150 /* baud rate information */
 151 struct divisor_table_entry {
 152         __u32   BaudRate;
 153         __u16  Divisor;
 154 };
 155
 156 /*
 157  * Define table of divisors for Rev A EdgePort/4 hardware
 158  * These assume a 3.6864MHz crystal, the standard /16, and
 159  * MCR.7 = 0.
 160  */
 161
 162 static const struct divisor_table_entry divisor_table[] = {
 163         {   50,         4608},
 164         {   75,         3072},
 165         {   110,        2095},  /* 2094.545455 => 230450   => .0217 % over */
 166         {   134,        1713},  /* 1713.011152 => 230398.5 => .00065% under */
 167         {   150,        1536},
 168         {   300,        768},
 169         {   600,        384},
 170         {   1200,       192},
 171         {   1800,       128},
 172         {   2400,       96},
 173         {   4800,       48},
 174         {   7200,       32},
 175         {   9600,       24},
 176         {   14400,      16},
 177         {   19200,      12},
 178         {   38400,      6},
 179         {   57600,      4},
 180         {   115200,     2},
 181         {   230400,     1},
 182 };
 183
 184 /* Number of outstanding Command Write Urbs */
 185 static atomic_t CmdUrbs = ATOMIC_INIT(0);
 186
 187
 188 /* local function prototypes */
 189
 190 /* function prototypes for all URB callbacks */
 191 static void edge_interrupt_callback(struct urb *urb);
 192 static void edge_bulk_in_callback(struct urb *urb);
 193 static void edge_bulk_out_data_callback(struct urb *urb);
 194 static void edge_bulk_out_cmd_callback(struct urb *urb);
 195
 196 /* function prototypes for the usbserial callbacks */
 197 static int edge_open(struct tty_struct *tty, struct usb_serial_port *port);
 198 static void edge_close(struct usb_serial_port *port);
 199 static int edge_write(struct tty_struct *tty, struct usb_serial_port *port,
 200                                         const unsigned char *buf, int count);
 201 static int edge_write_room(struct tty_struct *tty);
 202 static int edge_chars_in_buffer(struct tty_struct *tty);
 203 static void edge_throttle(struct tty_struct *tty);
 204 static void edge_unthrottle(struct tty_struct *tty);
 205 static void edge_set_termios(struct tty_struct *tty,
 206                                         struct usb_serial_port *port,
 207                                         struct ktermios *old_termios);
 208 static int  edge_ioctl(struct tty_struct *tty,
 209                                         unsigned int cmd, unsigned long arg);
 210 static void edge_break(struct tty_struct *tty, int break_state);
 211 static int  edge_tiocmget(struct tty_struct *tty);
 212 static int  edge_tiocmset(struct tty_struct *tty,
 213                                         unsigned int set, unsigned int clear);
 214 static int  edge_startup(struct usb_serial *serial);
 215 static void edge_disconnect(struct usb_serial *serial);
 216 static void edge_release(struct usb_serial *serial);
 217 static int edge_port_probe(struct usb_serial_port *port);
 218 static int edge_port_remove(struct usb_serial_port *port);
 219
 220 #include "io_tables.h"  /* all of the devices that this driver supports */
 221
 222 /* function prototypes for all of our local functions */
 223
 224 static void  process_rcvd_data(struct edgeport_serial *edge_serial,
 225                                 unsigned char *buffer, __u16 bufferLength);
 226 static void process_rcvd_status(struct edgeport_serial *edge_serial,
 227                                 __u8 byte2, __u8 byte3);
 228 static void edge_tty_recv(struct usb_serial_port *port, unsigned char *data,
 229                 int length);
 230 static void handle_new_msr(struct edgeport_port *edge_port, __u8 newMsr);
 231 static void handle_new_lsr(struct edgeport_port *edge_port, __u8 lsrData,
 232                                 __u8 lsr, __u8 data);
 233 static int  send_iosp_ext_cmd(struct edgeport_port *edge_port, __u8 command,
 234                                 __u8 param);
 235 static int  calc_baud_rate_divisor(struct device *dev, int baud_rate, int *divisor);
 236 static int  send_cmd_write_baud_rate(struct edgeport_port *edge_port,
 237                                 int baudRate);
 238 static void change_port_settings(struct tty_struct *tty,
 239                                 struct edgeport_port *edge_port,
 240                                 struct ktermios *old_termios);
 241 static int  send_cmd_write_uart_register(struct edgeport_port *edge_port,
 242                                 __u8 regNum, __u8 regValue);
 243 static int  write_cmd_usb(struct edgeport_port *edge_port,
 244                                 unsigned char *buffer, int writeLength);
 245 static void send_more_port_data(struct edgeport_serial *edge_serial,
 246                                 struct edgeport_port *edge_port);
 247
 248 static int sram_write(struct usb_serial *serial, __u16 extAddr, __u16 addr,
 249                                         __u16 length, const __u8 *data);
 250 static int rom_read(struct usb_serial *serial, __u16 extAddr, __u16 addr,
 251                                                 __u16 length, __u8 *data);
 252 static int rom_write(struct usb_serial *serial, __u16 extAddr, __u16 addr,
 253                                         __u16 length, const __u8 *data);
 254 static void get_manufacturing_desc(struct edgeport_serial *edge_serial);
 255 static void get_boot_desc(struct edgeport_serial *edge_serial);
 256 static void load_application_firmware(struct edgeport_serial *edge_serial);
 257
 258 static void unicode_to_ascii(char *string, int buflen,
 259                                 __le16 *unicode, int unicode_size);
 260
 261
 262 /* ************************************************************************ */
 263 /* ************************************************************************ */
 264 /* ************************************************************************ */
 265 /* ************************************************************************ */
 266
 267 /************************************************************************
 268  *                                                                      *
 269  * update_edgeport_E2PROM()     Compare current versions of             *
 270  *                              Boot ROM and Manufacture                *
 271  *                              Descriptors with versions               *
 272  *                              embedded in this driver                 *
 273  *                                                                      *
 274  ************************************************************************/
 275 static void update_edgeport_E2PROM(struct edgeport_serial *edge_serial)
 276 {
 277         struct device *dev = &edge_serial->serial->dev->dev;
 278         __u32 BootCurVer;
 279         __u32 BootNewVer;
 280         __u8 BootMajorVersion;
 281         __u8 BootMinorVersion;
 282         __u16 BootBuildNumber;
 283         __u32 Bootaddr;
 284         const struct ihex_binrec *rec;
 285         const struct firmware *fw;
 286         const char *fw_name;
 287         int response;
 288
 289         switch (edge_serial->product_info.iDownloadFile) {
 290         case EDGE_DOWNLOAD_FILE_I930:
 291                 fw_name = "edgeport/boot.fw";
 292                 break;
 293         case EDGE_DOWNLOAD_FILE_80251:
 294                 fw_name = "edgeport/boot2.fw";
 295                 break;
 296         default:
 297                 return;
 298         }
 299
 300         response = request_ihex_firmware(&fw, fw_name,
 301                                          &edge_serial->serial->dev->dev);
 302         if (response) {
 303                 dev_err(dev, "Failed to load image \"%s\" err %d\n",
 304                        fw_name, response);
 305                 return;
 306         }
 307
 308         rec = (const struct ihex_binrec *)fw->data;
 309         BootMajorVersion = rec->data[0];
 310         BootMinorVersion = rec->data[1];
 311         BootBuildNumber = (rec->data[2] << 8) | rec->data[3];
 312
 313         /* Check Boot Image Version */
 314         BootCurVer = (edge_serial->boot_descriptor.MajorVersion << 24) +
 315                      (edge_serial->boot_descriptor.MinorVersion << 16) +
 316                       le16_to_cpu(edge_serial->boot_descriptor.BuildNumber);
 317
 318         BootNewVer = (BootMajorVersion << 24) +
 319                      (BootMinorVersion << 16) +
 320                       BootBuildNumber;
 321
 322         dev_dbg(dev, "Current Boot Image version %d.%d.%d\n",
 323             edge_serial->boot_descriptor.MajorVersion,
 324             edge_serial->boot_descriptor.MinorVersion,
 325             le16_to_cpu(edge_serial->boot_descriptor.BuildNumber));
 326
 327
 328         if (BootNewVer > BootCurVer) {
 329                 dev_dbg(dev, "**Update Boot Image from %d.%d.%d to %d.%d.%d\n",
 330                     edge_serial->boot_descriptor.MajorVersion,
 331                     edge_serial->boot_descriptor.MinorVersion,
 332                     le16_to_cpu(edge_serial->boot_descriptor.BuildNumber),
 333                     BootMajorVersion, BootMinorVersion, BootBuildNumber);
 334
 335                 dev_dbg(dev, "Downloading new Boot Image\n");
 336
 337                 for (rec = ihex_next_binrec(rec); rec;
 338                      rec = ihex_next_binrec(rec)) {
 339                         Bootaddr = be32_to_cpu(rec->addr);
 340                         response = rom_write(edge_serial->serial,
 341                                              Bootaddr >> 16,
 342                                              Bootaddr & 0xFFFF,
 343                                              be16_to_cpu(rec->len),
 344                                              &rec->data[0]);
 345                         if (response < 0) {
 346                                 dev_err(&edge_serial->serial->dev->dev,
 347                                         "rom_write failed (%x, %x, %d)\n",
 348                                         Bootaddr >> 16, Bootaddr & 0xFFFF,
 349                                         be16_to_cpu(rec->len));
 350                                 break;
 351                         }
 352                 }
 353         } else {
 354                 dev_dbg(dev, "Boot Image -- already up to date\n");
 355         }
 356         release_firmware(fw);
 357 }
 358
 359 #if 0
 360 /************************************************************************
 361  *
 362  *  Get string descriptor from device
 363  *
 364  ************************************************************************/
 365 static int get_string_desc(struct usb_device *dev, int Id,
 366                                 struct usb_string_descriptor **pRetDesc)
 367 {
 368         struct usb_string_descriptor StringDesc;
 369         struct usb_string_descriptor *pStringDesc;
 370
 371         dev_dbg(&dev->dev, "%s - USB String ID = %d\n", __func__, Id);
 372
 373         if (!usb_get_descriptor(dev, USB_DT_STRING, Id, &StringDesc,
 374                                                 sizeof(StringDesc)))
 375                 return 0;
 376
 377         pStringDesc = kmalloc(StringDesc.bLength, GFP_KERNEL);
 378         if (!pStringDesc)
 379                 return -1;
 380
 381         if (!usb_get_descriptor(dev, USB_DT_STRING, Id, pStringDesc,
 382                                                         StringDesc.bLength)) {
 383                 kfree(pStringDesc);
 384                 return -1;
 385         }
 386
 387         *pRetDesc = pStringDesc;
 388         return 0;
 389 }
 390 #endif
 391
 392 static void dump_product_info(struct edgeport_serial *edge_serial,
 393                               struct edgeport_product_info *product_info)
 394 {
 395         struct device *dev = &edge_serial->serial->dev->dev;
 396
 397         /* Dump Product Info structure */
 398         dev_dbg(dev, "**Product Information:\n");
 399         dev_dbg(dev, "  ProductId             %x\n", product_info->ProductId);
 400         dev_dbg(dev, "  NumPorts              %d\n", product_info->NumPorts);
 401         dev_dbg(dev, "  ProdInfoVer           %d\n", product_info->ProdInfoVer);
 402         dev_dbg(dev, "  IsServer              %d\n", product_info->IsServer);
 403         dev_dbg(dev, "  IsRS232               %d\n", product_info->IsRS232);
 404         dev_dbg(dev, "  IsRS422               %d\n", product_info->IsRS422);
 405         dev_dbg(dev, "  IsRS485               %d\n", product_info->IsRS485);
 406         dev_dbg(dev, "  RomSize               %d\n", product_info->RomSize);
 407         dev_dbg(dev, "  RamSize               %d\n", product_info->RamSize);
 408         dev_dbg(dev, "  CpuRev                %x\n", product_info->CpuRev);
 409         dev_dbg(dev, "  BoardRev              %x\n", product_info->BoardRev);
 410         dev_dbg(dev, "  BootMajorVersion      %d.%d.%d\n",
 411                 product_info->BootMajorVersion,
 412                 product_info->BootMinorVersion,
 413                 le16_to_cpu(product_info->BootBuildNumber));
 414         dev_dbg(dev, "  FirmwareMajorVersion  %d.%d.%d\n",
 415                 product_info->FirmwareMajorVersion,
 416                 product_info->FirmwareMinorVersion,
 417                 le16_to_cpu(product_info->FirmwareBuildNumber));
 418         dev_dbg(dev, "  ManufactureDescDate   %d/%d/%d\n",
 419                 product_info->ManufactureDescDate[0],
 420                 product_info->ManufactureDescDate[1],
 421                 product_info->ManufactureDescDate[2]+1900);
 422         dev_dbg(dev, "  iDownloadFile         0x%x\n",
 423                 product_info->iDownloadFile);
 424         dev_dbg(dev, "  EpicVer               %d\n", product_info->EpicVer);
 425 }
 426
 427 static void get_product_info(struct edgeport_serial *edge_serial)
 428 {
 429         struct edgeport_product_info *product_info = &edge_serial->product_info;
 430
 431         memset(product_info, 0, sizeof(struct edgeport_product_info));
 432
 433         product_info->ProductId = (__u16)(le16_to_cpu(edge_serial->serial->dev->descriptor.idProduct) & ~ION_DEVICE_ID_80251_NETCHIP);
 434         product_info->NumPorts = edge_serial->manuf_descriptor.NumPorts;
 435         product_info->ProdInfoVer = 0;
 436
 437         product_info->RomSize = edge_serial->manuf_descriptor.RomSize;
 438         product_info->RamSize = edge_serial->manuf_descriptor.RamSize;
 439         product_info->CpuRev = edge_serial->manuf_descriptor.CpuRev;
 440         product_info->BoardRev = edge_serial->manuf_descriptor.BoardRev;
 441
 442         product_info->BootMajorVersion =
 443                                 edge_serial->boot_descriptor.MajorVersion;
 444         product_info->BootMinorVersion =
 445                                 edge_serial->boot_descriptor.MinorVersion;
 446         product_info->BootBuildNumber =
 447                                 edge_serial->boot_descriptor.BuildNumber;
 448
 449         memcpy(product_info->ManufactureDescDate,
 450                         edge_serial->manuf_descriptor.DescDate,
 451                         sizeof(edge_serial->manuf_descriptor.DescDate));
 452
 453         /* check if this is 2nd generation hardware */
 454         if (le16_to_cpu(edge_serial->serial->dev->descriptor.idProduct)
 455                                             & ION_DEVICE_ID_80251_NETCHIP)
 456                 product_info->iDownloadFile = EDGE_DOWNLOAD_FILE_80251;
 457         else
 458                 product_info->iDownloadFile = EDGE_DOWNLOAD_FILE_I930;
 459
 460         /* Determine Product type and set appropriate flags */
 461         switch (DEVICE_ID_FROM_USB_PRODUCT_ID(product_info->ProductId)) {
 462         case ION_DEVICE_ID_EDGEPORT_COMPATIBLE:
 463         case ION_DEVICE_ID_EDGEPORT_4T:
 464         case ION_DEVICE_ID_EDGEPORT_4:
 465         case ION_DEVICE_ID_EDGEPORT_2:
 466         case ION_DEVICE_ID_EDGEPORT_8_DUAL_CPU:
 467         case ION_DEVICE_ID_EDGEPORT_8:
 468         case ION_DEVICE_ID_EDGEPORT_421:
 469         case ION_DEVICE_ID_EDGEPORT_21:
 470         case ION_DEVICE_ID_EDGEPORT_2_DIN:
 471         case ION_DEVICE_ID_EDGEPORT_4_DIN:
 472         case ION_DEVICE_ID_EDGEPORT_16_DUAL_CPU:
 473                 product_info->IsRS232 = 1;
 474                 break;
 475
 476         case ION_DEVICE_ID_EDGEPORT_2I: /* Edgeport/2 RS422/RS485 */
 477                 product_info->IsRS422 = 1;
 478                 product_info->IsRS485 = 1;
 479                 break;
 480
 481         case ION_DEVICE_ID_EDGEPORT_8I: /* Edgeport/4 RS422 */
 482         case ION_DEVICE_ID_EDGEPORT_4I: /* Edgeport/4 RS422 */
 483                 product_info->IsRS422 = 1;
 484                 break;
 485         }
 486
 487         dump_product_info(edge_serial, product_info);
 488 }
 489
 490 static int get_epic_descriptor(struct edgeport_serial *ep)
 491 {
 492         int result;
 493         struct usb_serial *serial = ep->serial;
 494         struct edgeport_product_info *product_info = &ep->product_info;
 495         struct edge_compatibility_descriptor *epic = &ep->epic_descriptor;
 496         struct edge_compatibility_bits *bits;
 497         struct device *dev = &serial->dev->dev;
 498
 499         ep->is_epic = 0;
 500         result = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
 501                                  USB_REQUEST_ION_GET_EPIC_DESC,
 502                                  0xC0, 0x00, 0x00,
 503                                  &ep->epic_descriptor,
 504                                  sizeof(struct edge_compatibility_descriptor),
 505                                  300);
 506
 507         if (result > 0) {
 508                 ep->is_epic = 1;
 509                 memset(product_info, 0, sizeof(struct edgeport_product_info));
 510
 511                 product_info->NumPorts = epic->NumPorts;
 512                 product_info->ProdInfoVer = 0;
 513                 product_info->FirmwareMajorVersion = epic->MajorVersion;
 514                 product_info->FirmwareMinorVersion = epic->MinorVersion;
 515                 product_info->FirmwareBuildNumber = epic->BuildNumber;
 516                 product_info->iDownloadFile = epic->iDownloadFile;
 517                 product_info->EpicVer = epic->EpicVer;
 518                 product_info->Epic = epic->Supports;
 519                 product_info->ProductId = ION_DEVICE_ID_EDGEPORT_COMPATIBLE;
 520                 dump_product_info(ep, product_info);
 521
 522                 bits = &ep->epic_descriptor.Supports;
 523                 dev_dbg(dev, "**EPIC descriptor:\n");
 524                 dev_dbg(dev, "  VendEnableSuspend: %s\n", bits->VendEnableSuspend ? "TRUE": "FALSE");
 525                 dev_dbg(dev, "  IOSPOpen         : %s\n", bits->IOSPOpen        ? "TRUE": "FALSE");
 526                 dev_dbg(dev, "  IOSPClose        : %s\n", bits->IOSPClose       ? "TRUE": "FALSE");
 527                 dev_dbg(dev, "  IOSPChase        : %s\n", bits->IOSPChase       ? "TRUE": "FALSE");
 528                 dev_dbg(dev, "  IOSPSetRxFlow    : %s\n", bits->IOSPSetRxFlow   ? "TRUE": "FALSE");
 529                 dev_dbg(dev, "  IOSPSetTxFlow    : %s\n", bits->IOSPSetTxFlow   ? "TRUE": "FALSE");
 530                 dev_dbg(dev, "  IOSPSetXChar     : %s\n", bits->IOSPSetXChar    ? "TRUE": "FALSE");
 531                 dev_dbg(dev, "  IOSPRxCheck      : %s\n", bits->IOSPRxCheck     ? "TRUE": "FALSE");
 532                 dev_dbg(dev, "  IOSPSetClrBreak  : %s\n", bits->IOSPSetClrBreak ? "TRUE": "FALSE");
 533                 dev_dbg(dev, "  IOSPWriteMCR     : %s\n", bits->IOSPWriteMCR    ? "TRUE": "FALSE");
 534                 dev_dbg(dev, "  IOSPWriteLCR     : %s\n", bits->IOSPWriteLCR    ? "TRUE": "FALSE");
 535                 dev_dbg(dev, "  IOSPSetBaudRate  : %s\n", bits->IOSPSetBaudRate ? "TRUE": "FALSE");
 536                 dev_dbg(dev, "  TrueEdgeport     : %s\n", bits->TrueEdgeport    ? "TRUE": "FALSE");
 537         }
 538
 539         return result;
 540 }
 541
 542
 543 /************************************************************************/
 544 /************************************************************************/
 545 /*            U S B  C A L L B A C K   F U N C T I O N S                */
 546 /*            U S B  C A L L B A C K   F U N C T I O N S                */
 547 /************************************************************************/
 548 /************************************************************************/
 549
 550 /*****************************************************************************
 551  * edge_interrupt_callback
 552  *      this is the callback function for when we have received data on the
 553  *      interrupt endpoint.
 554  *****************************************************************************/
 555 static void edge_interrupt_callback(struct urb *urb)
 556 {
 557         struct edgeport_serial *edge_serial = urb->context;
 558         struct device *dev;
 559         struct edgeport_port *edge_port;
 560         struct usb_serial_port *port;
 561         unsigned char *data = urb->transfer_buffer;
 562         int length = urb->actual_length;
 563         int bytes_avail;
 564         int position;
 565         int txCredits;
 566         int portNumber;
 567         int result;
 568         int status = urb->status;
 569
 570         switch (status) {
 571         case 0:
 572                 /* success */
 573                 break;
 574         case -ECONNRESET:
 575         case -ENOENT:
 576         case -ESHUTDOWN:
 577                 /* this urb is terminated, clean up */
 578                 dev_dbg(&urb->dev->dev, "%s - urb shutting down with status: %d\n", __func__, status);
 579                 return;
 580         default:
 581                 dev_dbg(&urb->dev->dev, "%s - nonzero urb status received: %d\n", __func__, status);
 582                 goto exit;
 583         }
 584
 585         dev = &edge_serial->serial->dev->dev;
 586
 587         /* process this interrupt-read even if there are no ports open */
 588         if (length) {
 589                 usb_serial_debug_data(dev, __func__, length, data);
 590
 591                 if (length > 1) {
 592                         bytes_avail = data[0] | (data[1] << 8);
 593                         if (bytes_avail) {
 594                                 spin_lock(&edge_serial->es_lock);
 595                                 edge_serial->rxBytesAvail += bytes_avail;
 596                                 dev_dbg(dev,
 597                                         "%s - bytes_avail=%d, rxBytesAvail=%d, read_in_progress=%d\n",
 598                                         __func__, bytes_avail,
 599                                         edge_serial->rxBytesAvail,
 600                                         edge_serial->read_in_progress);
 601
 602                                 if (edge_serial->rxBytesAvail > 0 &&
 603                                     !edge_serial->read_in_progress) {
 604                                         dev_dbg(dev, "%s - posting a read\n", __func__);
 605                                         edge_serial->read_in_progress = true;
 606
 607                                         /* we have pending bytes on the
 608                                            bulk in pipe, send a request */
 609                                         result = usb_submit_urb(edge_serial->read_urb, GFP_ATOMIC);
 610                                         if (result) {
 611                                                 dev_err(dev,
 612                                                         "%s - usb_submit_urb(read bulk) failed with result = %d\n",
 613                                                         __func__, result);
 614                                                 edge_serial->read_in_progress = false;
 615                                         }
 616                                 }
 617                                 spin_unlock(&edge_serial->es_lock);
 618                         }
 619                 }
 620                 /* grab the txcredits for the ports if available */
 621                 position = 2;
 622                 portNumber = 0;
 623                 while ((position < length) &&
 624                                 (portNumber < edge_serial->serial->num_ports)) {
 625                         txCredits = data[position] | (data[position+1] << 8);
 626                         if (txCredits) {
 627                                 port = edge_serial->serial->port[portNumber];
 628                                 edge_port = usb_get_serial_port_data(port);
 629                                 if (edge_port->open) {
 630                                         spin_lock(&edge_port->ep_lock);
 631                                         edge_port->txCredits += txCredits;
 632                                         spin_unlock(&edge_port->ep_lock);
 633                                         dev_dbg(dev, "%s - txcredits for port%d = %d\n",
 634                                                 __func__, portNumber,
 635                                                 edge_port->txCredits);
 636
 637                                         /* tell the tty driver that something
 638                                            has changed */
 639                                         tty_port_tty_wakeup(&edge_port->port->port);
 640                                         /* Since we have more credit, check
 641                                            if more data can be sent */
 642                                         send_more_port_data(edge_serial,
 643                                                                 edge_port);
 644                                 }
 645                         }
 646                         position += 2;
 647                         ++portNumber;
 648                 }
 649         }
 650
 651 exit:
 652         result = usb_submit_urb(urb, GFP_ATOMIC);
 653         if (result)
 654                 dev_err(&urb->dev->dev,
 655                         "%s - Error %d submitting control urb\n",
 656                                                 __func__, result);
 657 }
 658
 659
 660 /*****************************************************************************
 661  * edge_bulk_in_callback
 662  *      this is the callback function for when we have received data on the
 663  *      bulk in endpoint.
 664  *****************************************************************************/
 665 static void edge_bulk_in_callback(struct urb *urb)
 666 {
 667         struct edgeport_serial  *edge_serial = urb->context;
 668         struct device *dev;
 669         unsigned char           *data = urb->transfer_buffer;
 670         int                     retval;
 671         __u16                   raw_data_length;
 672         int status = urb->status;
 673
 674         if (status) {
 675                 dev_dbg(&urb->dev->dev, "%s - nonzero read bulk status received: %d\n",
 676                         __func__, status);
 677                 edge_serial->read_in_progress = false;
 678                 return;
 679         }
 680
 681         if (urb->actual_length == 0) {
 682                 dev_dbg(&urb->dev->dev, "%s - read bulk callback with no data\n", __func__);
 683                 edge_serial->read_in_progress = false;
 684                 return;
 685         }
 686
 687         dev = &edge_serial->serial->dev->dev;
 688         raw_data_length = urb->actual_length;
 689
 690         usb_serial_debug_data(dev, __func__, raw_data_length, data);
 691
 692         spin_lock(&edge_serial->es_lock);
 693
 694         /* decrement our rxBytes available by the number that we just got */
 695         edge_serial->rxBytesAvail -= raw_data_length;
 696
 697         dev_dbg(dev, "%s - Received = %d, rxBytesAvail %d\n", __func__,
 698                 raw_data_length, edge_serial->rxBytesAvail);
 699
 700         process_rcvd_data(edge_serial, data, urb->actual_length);
 701
 702         /* check to see if there's any more data for us to read */
 703         if (edge_serial->rxBytesAvail > 0) {
 704                 dev_dbg(dev, "%s - posting a read\n", __func__);
 705                 retval = usb_submit_urb(edge_serial->read_urb, GFP_ATOMIC);
 706                 if (retval) {
 707                         dev_err(dev,
 708                                 "%s - usb_submit_urb(read bulk) failed, retval = %d\n",
 709                                 __func__, retval);
 710                         edge_serial->read_in_progress = false;
 711                 }
 712         } else {
 713                 edge_serial->read_in_progress = false;
 714         }
 715
 716         spin_unlock(&edge_serial->es_lock);
 717 }
 718
 719
 720 /*****************************************************************************
 721  * edge_bulk_out_data_callback
 722  *      this is the callback function for when we have finished sending
 723  *      serial data on the bulk out endpoint.
 724  *****************************************************************************/
 725 static void edge_bulk_out_data_callback(struct urb *urb)
 726 {
 727         struct edgeport_port *edge_port = urb->context;
 728         int status = urb->status;
 729
 730         if (status) {
 731                 dev_dbg(&urb->dev->dev,
 732                         "%s - nonzero write bulk status received: %d\n",
 733                         __func__, status);
 734         }
 735
 736         if (edge_port->open)
 737                 tty_port_tty_wakeup(&edge_port->port->port);
 738
 739         /* Release the Write URB */
 740         edge_port->write_in_progress = false;
 741
 742         /* Check if more data needs to be sent */
 743         send_more_port_data((struct edgeport_serial *)
 744                 (usb_get_serial_data(edge_port->port->serial)), edge_port);
 745 }
 746
 747
 748 /*****************************************************************************
 749  * BulkOutCmdCallback
 750  *      this is the callback function for when we have finished sending a
 751  *      command on the bulk out endpoint.
 752  *****************************************************************************/
 753 static void edge_bulk_out_cmd_callback(struct urb *urb)
 754 {
 755         struct edgeport_port *edge_port = urb->context;
 756         int status = urb->status;
 757
 758         atomic_dec(&CmdUrbs);
 759         dev_dbg(&urb->dev->dev, "%s - FREE URB %p (outstanding %d)\n",
 760                 __func__, urb, atomic_read(&CmdUrbs));
 761
 762
 763         /* clean up the transfer buffer */
 764         kfree(urb->transfer_buffer);
 765
 766         /* Free the command urb */
 767         usb_free_urb(urb);
 768
 769         if (status) {
 770                 dev_dbg(&urb->dev->dev,
 771                         "%s - nonzero write bulk status received: %d\n",
 772                         __func__, status);
 773                 return;
 774         }
 775
 776         /* tell the tty driver that something has changed */
 777         if (edge_port->open)
 778                 tty_port_tty_wakeup(&edge_port->port->port);
 779
 780         /* we have completed the command */
 781         edge_port->commandPending = false;
 782         wake_up(&edge_port->wait_command);
 783 }
 784
 785
 786 /*****************************************************************************
 787  * Driver tty interface functions
 788  *****************************************************************************/
 789
 790 /*****************************************************************************
 791  * SerialOpen
 792  *      this function is called by the tty driver when a port is opened
 793  *      If successful, we return 0
 794  *      Otherwise we return a negative error number.
 795  *****************************************************************************/
 796 static int edge_open(struct tty_struct *tty, struct usb_serial_port *port)
 797 {
 798         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
 799         struct device *dev = &port->dev;
 800         struct usb_serial *serial;
 801         struct edgeport_serial *edge_serial;
 802         int response;
 803
 804         if (edge_port == NULL)
 805                 return -ENODEV;
 806
 807         /* see if we've set up our endpoint info yet (can't set it up
 808            in edge_startup as the structures were not set up at that time.) */
 809         serial = port->serial;
 810         edge_serial = usb_get_serial_data(serial);
 811         if (edge_serial == NULL)
 812                 return -ENODEV;
 813         if (edge_serial->interrupt_in_buffer == NULL) {
 814                 struct usb_serial_port *port0 = serial->port[0];
 815
 816                 /* not set up yet, so do it now */
 817                 edge_serial->interrupt_in_buffer =
 818                                         port0->interrupt_in_buffer;
 819                 edge_serial->interrupt_in_endpoint =
 820                                         port0->interrupt_in_endpointAddress;
 821                 edge_serial->interrupt_read_urb = port0->interrupt_in_urb;
 822                 edge_serial->bulk_in_buffer = port0->bulk_in_buffer;
 823                 edge_serial->bulk_in_endpoint =
 824                                         port0->bulk_in_endpointAddress;
 825                 edge_serial->read_urb = port0->read_urb;
 826                 edge_serial->bulk_out_endpoint =
 827                                         port0->bulk_out_endpointAddress;
 828
 829                 /* set up our interrupt urb */
 830                 usb_fill_int_urb(edge_serial->interrupt_read_urb,
 831                       serial->dev,
 832                       usb_rcvintpipe(serial->dev,
 833                                 port0->interrupt_in_endpointAddress),
 834                       port0->interrupt_in_buffer,
 835                       edge_serial->interrupt_read_urb->transfer_buffer_length,
 836                       edge_interrupt_callback, edge_serial,
 837                       edge_serial->interrupt_read_urb->interval);
 838
 839                 /* set up our bulk in urb */
 840                 usb_fill_bulk_urb(edge_serial->read_urb, serial->dev,
 841                         usb_rcvbulkpipe(serial->dev,
 842                                 port0->bulk_in_endpointAddress),
 843                         port0->bulk_in_buffer,
 844                         edge_serial->read_urb->transfer_buffer_length,
 845                         edge_bulk_in_callback, edge_serial);
 846                 edge_serial->read_in_progress = false;
 847
 848                 /* start interrupt read for this edgeport
 849                  * this interrupt will continue as long
 850                  * as the edgeport is connected */
 851                 response = usb_submit_urb(edge_serial->interrupt_read_urb,
 852                                                                 GFP_KERNEL);
 853                 if (response) {
 854                         dev_err(dev, "%s - Error %d submitting control urb\n",
 855                                 __func__, response);
 856                 }
 857         }
 858
 859         /* initialize our wait queues */
 860         init_waitqueue_head(&edge_port->wait_open);
 861         init_waitqueue_head(&edge_port->wait_chase);
 862         init_waitqueue_head(&edge_port->wait_command);
 863
 864         /* initialize our port settings */
 865         edge_port->txCredits = 0;       /* Can't send any data yet */
 866         /* Must always set this bit to enable ints! */
 867         edge_port->shadowMCR = MCR_MASTER_IE;
 868         edge_port->chaseResponsePending = false;
 869
 870         /* send a open port command */
 871         edge_port->openPending = true;
 872         edge_port->open        = false;
 873         response = send_iosp_ext_cmd(edge_port, IOSP_CMD_OPEN_PORT, 0);
 874
 875         if (response < 0) {
 876                 dev_err(dev, "%s - error sending open port command\n", __func__);
 877                 edge_port->openPending = false;
 878                 return -ENODEV;
 879         }
 880
 881         /* now wait for the port to be completely opened */
 882         wait_event_timeout(edge_port->wait_open, !edge_port->openPending,
 883                                                                 OPEN_TIMEOUT);
 884
 885         if (!edge_port->open) {
 886                 /* open timed out */
 887                 dev_dbg(dev, "%s - open timedout\n", __func__);
 888                 edge_port->openPending = false;
 889                 return -ENODEV;
 890         }
 891
 892         /* create the txfifo */
 893         edge_port->txfifo.head  = 0;
 894         edge_port->txfifo.tail  = 0;
 895         edge_port->txfifo.count = 0;
 896         edge_port->txfifo.size  = edge_port->maxTxCredits;
 897         edge_port->txfifo.fifo  = kmalloc(edge_port->maxTxCredits, GFP_KERNEL);
 898
 899         if (!edge_port->txfifo.fifo) {
 900                 edge_close(port);
 901                 return -ENOMEM;
 902         }
 903
 904         /* Allocate a URB for the write */
 905         edge_port->write_urb = usb_alloc_urb(0, GFP_KERNEL);
 906         edge_port->write_in_progress = false;
 907
 908         if (!edge_port->write_urb) {
 909                 edge_close(port);
 910                 return -ENOMEM;
 911         }
 912
 913         dev_dbg(dev, "%s - Initialize TX fifo to %d bytes\n",
 914                 __func__, edge_port->maxTxCredits);
 915
 916         return 0;
 917 }
 918
 919
 920 /************************************************************************
 921  *
 922  * block_until_chase_response
 923  *
 924  *      This function will block the close until one of the following:
 925  *              1. Response to our Chase comes from Edgeport
 926  *              2. A timeout of 10 seconds without activity has expired
 927  *                 (1K of Edgeport data @ 2400 baud ==> 4 sec to empty)
 928  *
 929  ************************************************************************/
 930 static void block_until_chase_response(struct edgeport_port *edge_port)
 931 {
 932         struct device *dev = &edge_port->port->dev;
 933         DEFINE_WAIT(wait);
 934         __u16 lastCredits;
 935         int timeout = 1*HZ;
 936         int loop = 10;
 937
 938         while (1) {
 939                 /* Save Last credits */
 940                 lastCredits = edge_port->txCredits;
 941
 942                 /* Did we get our Chase response */
 943                 if (!edge_port->chaseResponsePending) {
 944                         dev_dbg(dev, "%s - Got Chase Response\n", __func__);
 945
 946                         /* did we get all of our credit back? */
 947                         if (edge_port->txCredits == edge_port->maxTxCredits) {
 948                                 dev_dbg(dev, "%s - Got all credits\n", __func__);
 949                                 return;
 950                         }
 951                 }
 952
 953                 /* Block the thread for a while */
 954                 prepare_to_wait(&edge_port->wait_chase, &wait,
 955                                                 TASK_UNINTERRUPTIBLE);
 956                 schedule_timeout(timeout);
 957                 finish_wait(&edge_port->wait_chase, &wait);
 958
 959                 if (lastCredits == edge_port->txCredits) {
 960                         /* No activity.. count down. */
 961                         loop--;
 962                         if (loop == 0) {
 963                                 edge_port->chaseResponsePending = false;
 964                                 dev_dbg(dev, "%s - Chase TIMEOUT\n", __func__);
 965                                 return;
 966                         }
 967                 } else {
 968                         /* Reset timeout value back to 10 seconds */
 969                         dev_dbg(dev, "%s - Last %d, Current %d\n", __func__,
 970                                         lastCredits, edge_port->txCredits);
 971                         loop = 10;
 972                 }
 973         }
 974 }
 975
 976
 977 /************************************************************************
 978  *
 979  * block_until_tx_empty
 980  *
 981  *      This function will block the close until one of the following:
 982  *              1. TX count are 0
 983  *              2. The edgeport has stopped
 984  *              3. A timeout of 3 seconds without activity has expired
 985  *
 986  ************************************************************************/
 987 static void block_until_tx_empty(struct edgeport_port *edge_port)
 988 {
 989         struct device *dev = &edge_port->port->dev;
 990         DEFINE_WAIT(wait);
 991         struct TxFifo *fifo = &edge_port->txfifo;
 992         __u32 lastCount;
 993         int timeout = HZ/10;
 994         int loop = 30;
 995
 996         while (1) {
 997                 /* Save Last count */
 998                 lastCount = fifo->count;
 999
1000                 /* Is the Edgeport Buffer empty? */
1001                 if (lastCount == 0) {
1002                         dev_dbg(dev, "%s - TX Buffer Empty\n", __func__);
1003                         return;
1004                 }
1005
1006                 /* Block the thread for a while */
1007                 prepare_to_wait(&edge_port->wait_chase, &wait,
1008                                                 TASK_UNINTERRUPTIBLE);
1009                 schedule_timeout(timeout);
1010                 finish_wait(&edge_port->wait_chase, &wait);
1011
1012                 dev_dbg(dev, "%s wait\n", __func__);
1013
1014                 if (lastCount == fifo->count) {
1015                         /* No activity.. count down. */
1016                         loop--;
1017                         if (loop == 0) {
1018                                 dev_dbg(dev, "%s - TIMEOUT\n", __func__);
1019                                 return;
1020                         }
1021                 } else {
1022                         /* Reset timeout value back to seconds */
1023                         loop = 30;
1024                 }
1025         }
1026 }
1027
1028
1029 /*****************************************************************************
1030  * edge_close
1031  *      this function is called by the tty driver when a port is closed
1032  *****************************************************************************/
1033 static void edge_close(struct usb_serial_port *port)
1034 {
1035         struct edgeport_serial *edge_serial;
1036         struct edgeport_port *edge_port;
1037         int status;
1038
1039         edge_serial = usb_get_serial_data(port->serial);
1040         edge_port = usb_get_serial_port_data(port);
1041         if (edge_serial == NULL || edge_port == NULL)
1042                 return;
1043
1044         /* block until tx is empty */
1045         block_until_tx_empty(edge_port);
1046
1047         edge_port->closePending = true;
1048
1049         if (!edge_serial->is_epic ||
1050             edge_serial->epic_descriptor.Supports.IOSPChase) {
1051                 /* flush and chase */
1052                 edge_port->chaseResponsePending = true;
1053
1054                 dev_dbg(&port->dev, "%s - Sending IOSP_CMD_CHASE_PORT\n", __func__);
1055                 status = send_iosp_ext_cmd(edge_port, IOSP_CMD_CHASE_PORT, 0);
1056                 if (status == 0)
1057                         /* block until chase finished */
1058                         block_until_chase_response(edge_port);
1059                 else
1060                         edge_port->chaseResponsePending = false;
1061         }
1062
1063         if (!edge_serial->is_epic ||
1064             edge_serial->epic_descriptor.Supports.IOSPClose) {
1065                /* close the port */
1066                 dev_dbg(&port->dev, "%s - Sending IOSP_CMD_CLOSE_PORT\n", __func__);
1067                 send_iosp_ext_cmd(edge_port, IOSP_CMD_CLOSE_PORT, 0);
1068         }
1069
1070         /* port->close = true; */
1071         edge_port->closePending = false;
1072         edge_port->open = false;
1073         edge_port->openPending = false;
1074
1075         usb_kill_urb(edge_port->write_urb);
1076
1077         if (edge_port->write_urb) {
1078                 /* if this urb had a transfer buffer already
1079                                 (old transfer) free it */
1080                 kfree(edge_port->write_urb->transfer_buffer);
1081                 usb_free_urb(edge_port->write_urb);
1082                 edge_port->write_urb = NULL;
1083         }
1084         kfree(edge_port->txfifo.fifo);
1085         edge_port->txfifo.fifo = NULL;
1086 }
1087
1088 /*****************************************************************************
1089  * SerialWrite
1090  *      this function is called by the tty driver when data should be written
1091  *      to the port.
1092  *      If successful, we return the number of bytes written, otherwise we
1093  *      return a negative error number.
1094  *****************************************************************************/
1095 static int edge_write(struct tty_struct *tty, struct usb_serial_port *port,
1096                                         const unsigned char *data, int count)
1097 {
1098         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1099         struct TxFifo *fifo;
1100         int copySize;
1101         int bytesleft;
1102         int firsthalf;
1103         int secondhalf;
1104         unsigned long flags;
1105
1106         if (edge_port == NULL)
1107                 return -ENODEV;
1108
1109         /* get a pointer to the Tx fifo */
1110         fifo = &edge_port->txfifo;
1111
1112         spin_lock_irqsave(&edge_port->ep_lock, flags);
1113
1114         /* calculate number of bytes to put in fifo */
1115         copySize = min((unsigned int)count,
1116                                 (edge_port->txCredits - fifo->count));
1117
1118         dev_dbg(&port->dev, "%s of %d byte(s) Fifo room  %d -- will copy %d bytes\n",
1119                 __func__, count, edge_port->txCredits - fifo->count, copySize);
1120
1121         /* catch writes of 0 bytes which the tty driver likes to give us,
1122            and when txCredits is empty */
1123         if (copySize == 0) {
1124                 dev_dbg(&port->dev, "%s - copySize = Zero\n", __func__);
1125                 goto finish_write;
1126         }
1127
1128         /* queue the data
1129          * since we can never overflow the buffer we do not have to check for a
1130          * full condition
1131          *
1132          * the copy is done is two parts -- first fill to the end of the buffer
1133          * then copy the reset from the start of the buffer
1134          */
1135         bytesleft = fifo->size - fifo->head;
1136         firsthalf = min(bytesleft, copySize);
1137         dev_dbg(&port->dev, "%s - copy %d bytes of %d into fifo \n", __func__,
1138                 firsthalf, bytesleft);
1139
1140         /* now copy our data */
1141         memcpy(&fifo->fifo[fifo->head], data, firsthalf);
1142         usb_serial_debug_data(&port->dev, __func__, firsthalf, &fifo->fifo[fifo->head]);
1143
1144         /* update the index and size */
1145         fifo->head  += firsthalf;
1146         fifo->count += firsthalf;
1147
1148         /* wrap the index */
1149         if (fifo->head == fifo->size)
1150                 fifo->head = 0;
1151
1152         secondhalf = copySize-firsthalf;
1153
1154         if (secondhalf) {
1155                 dev_dbg(&port->dev, "%s - copy rest of data %d\n", __func__, secondhalf);
1156                 memcpy(&fifo->fifo[fifo->head], &data[firsthalf], secondhalf);
1157                 usb_serial_debug_data(&port->dev, __func__, secondhalf, &fifo->fifo[fifo->head]);
1158                 /* update the index and size */
1159                 fifo->count += secondhalf;
1160                 fifo->head  += secondhalf;
1161                 /* No need to check for wrap since we can not get to end of
1162                  * the fifo in this part
1163                  */
1164         }
1165
1166 finish_write:
1167         spin_unlock_irqrestore(&edge_port->ep_lock, flags);
1168
1169         send_more_port_data((struct edgeport_serial *)
1170                         usb_get_serial_data(port->serial), edge_port);
1171
1172         dev_dbg(&port->dev, "%s wrote %d byte(s) TxCredits %d, Fifo %d\n",
1173                 __func__, copySize, edge_port->txCredits, fifo->count);
1174
1175         return copySize;
1176 }
1177
1178
1179 /************************************************************************
1180  *
1181  * send_more_port_data()
1182  *
1183  *      This routine attempts to write additional UART transmit data
1184  *      to a port over the USB bulk pipe. It is called (1) when new
1185  *      data has been written to a port's TxBuffer from higher layers
1186  *      (2) when the peripheral sends us additional TxCredits indicating
1187  *      that it can accept more Tx data for a given port; and (3) when
1188  *      a bulk write completes successfully and we want to see if we
1189  *      can transmit more.
1190  *
1191  ************************************************************************/
1192 static void send_more_port_data(struct edgeport_serial *edge_serial,
1193                                         struct edgeport_port *edge_port)
1194 {
1195         struct TxFifo   *fifo = &edge_port->txfifo;
1196         struct device   *dev = &edge_port->port->dev;
1197         struct urb      *urb;
1198         unsigned char   *buffer;
1199         int             status;
1200         int             count;
1201         int             bytesleft;
1202         int             firsthalf;
1203         int             secondhalf;
1204         unsigned long   flags;
1205
1206         spin_lock_irqsave(&edge_port->ep_lock, flags);
1207
1208         if (edge_port->write_in_progress ||
1209             !edge_port->open             ||
1210             (fifo->count == 0)) {
1211                 dev_dbg(dev, "%s EXIT - fifo %d, PendingWrite = %d\n",
1212                         __func__, fifo->count, edge_port->write_in_progress);
1213                 goto exit_send;
1214         }
1215
1216         /* since the amount of data in the fifo will always fit into the
1217          * edgeport buffer we do not need to check the write length
1218          *
1219          * Do we have enough credits for this port to make it worthwhile
1220          * to bother queueing a write. If it's too small, say a few bytes,
1221          * it's better to wait for more credits so we can do a larger write.
1222          */
1223         if (edge_port->txCredits < EDGE_FW_GET_TX_CREDITS_SEND_THRESHOLD(edge_port->maxTxCredits, EDGE_FW_BULK_MAX_PACKET_SIZE)) {
1224                 dev_dbg(dev, "%s Not enough credit - fifo %d TxCredit %d\n",
1225                         __func__, fifo->count, edge_port->txCredits);
1226                 goto exit_send;
1227         }
1228
1229         /* lock this write */
1230         edge_port->write_in_progress = true;
1231
1232         /* get a pointer to the write_urb */
1233         urb = edge_port->write_urb;
1234
1235         /* make sure transfer buffer is freed */
1236         kfree(urb->transfer_buffer);
1237         urb->transfer_buffer = NULL;
1238
1239         /* build the data header for the buffer and port that we are about
1240            to send out */
1241         count = fifo->count;
1242         buffer = kmalloc(count+2, GFP_ATOMIC);
1243         if (!buffer) {
1244                 edge_port->write_in_progress = false;
1245                 goto exit_send;
1246         }
1247         buffer[0] = IOSP_BUILD_DATA_HDR1(edge_port->port->port_number, count);
1248         buffer[1] = IOSP_BUILD_DATA_HDR2(edge_port->port->port_number, count);
1249
1250         /* now copy our data */
1251         bytesleft =  fifo->size - fifo->tail;
1252         firsthalf = min(bytesleft, count);
1253         memcpy(&buffer[2], &fifo->fifo[fifo->tail], firsthalf);
1254         fifo->tail  += firsthalf;
1255         fifo->count -= firsthalf;
1256         if (fifo->tail == fifo->size)
1257                 fifo->tail = 0;
1258
1259         secondhalf = count-firsthalf;
1260         if (secondhalf) {
1261                 memcpy(&buffer[2+firsthalf], &fifo->fifo[fifo->tail],
1262                                                                 secondhalf);
1263                 fifo->tail  += secondhalf;
1264                 fifo->count -= secondhalf;
1265         }
1266
1267         if (count)
1268                 usb_serial_debug_data(&edge_port->port->dev, __func__, count, &buffer[2]);
1269
1270         /* fill up the urb with all of our data and submit it */
1271         usb_fill_bulk_urb(urb, edge_serial->serial->dev,
1272                         usb_sndbulkpipe(edge_serial->serial->dev,
1273                                         edge_serial->bulk_out_endpoint),
1274                         buffer, count+2,
1275                         edge_bulk_out_data_callback, edge_port);
1276
1277         /* decrement the number of credits we have by the number we just sent */
1278         edge_port->txCredits -= count;
1279         edge_port->port->icount.tx += count;
1280
1281         status = usb_submit_urb(urb, GFP_ATOMIC);
1282         if (status) {
1283                 /* something went wrong */
1284                 dev_err_console(edge_port->port,
1285                         "%s - usb_submit_urb(write bulk) failed, status = %d, data lost\n",
1286                                 __func__, status);
1287                 edge_port->write_in_progress = false;
1288
1289                 /* revert the credits as something bad happened. */
1290                 edge_port->txCredits += count;
1291                 edge_port->port->icount.tx -= count;
1292         }
1293         dev_dbg(dev, "%s wrote %d byte(s) TxCredit %d, Fifo %d\n",
1294                 __func__, count, edge_port->txCredits, fifo->count);
1295
1296 exit_send:
1297         spin_unlock_irqrestore(&edge_port->ep_lock, flags);
1298 }
1299
1300
1301 /*****************************************************************************
1302  * edge_write_room
1303  *      this function is called by the tty driver when it wants to know how
1304  *      many bytes of data we can accept for a specific port. If successful,
1305  *      we return the amount of room that we have for this port (the txCredits)
1306  *      otherwise we return a negative error number.
1307  *****************************************************************************/
1308 static int edge_write_room(struct tty_struct *tty)
1309 {
1310         struct usb_serial_port *port = tty->driver_data;
1311         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1312         int room;
1313         unsigned long flags;
1314
1315         if (edge_port == NULL)
1316                 return 0;
1317         if (edge_port->closePending)
1318                 return 0;
1319
1320         if (!edge_port->open) {
1321                 dev_dbg(&port->dev, "%s - port not opened\n", __func__);
1322                 return 0;
1323         }
1324
1325         /* total of both buffers is still txCredit */
1326         spin_lock_irqsave(&edge_port->ep_lock, flags);
1327         room = edge_port->txCredits - edge_port->txfifo.count;
1328         spin_unlock_irqrestore(&edge_port->ep_lock, flags);
1329
1330         dev_dbg(&port->dev, "%s - returns %d\n", __func__, room);
1331         return room;
1332 }
1333
1334
1335 /*****************************************************************************
1336  * edge_chars_in_buffer
1337  *      this function is called by the tty driver when it wants to know how
1338  *      many bytes of data we currently have outstanding in the port (data that
1339  *      has been written, but hasn't made it out the port yet)
1340  *      If successful, we return the number of bytes left to be written in the
1341  *      system,
1342  *      Otherwise we return a negative error number.
1343  *****************************************************************************/
1344 static int edge_chars_in_buffer(struct tty_struct *tty)
1345 {
1346         struct usb_serial_port *port = tty->driver_data;
1347         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1348         int num_chars;
1349         unsigned long flags;
1350
1351         if (edge_port == NULL)
1352                 return 0;
1353         if (edge_port->closePending)
1354                 return 0;
1355
1356         if (!edge_port->open) {
1357                 dev_dbg(&port->dev, "%s - port not opened\n", __func__);
1358                 return 0;
1359         }
1360
1361         spin_lock_irqsave(&edge_port->ep_lock, flags);
1362         num_chars = edge_port->maxTxCredits - edge_port->txCredits +
1363                                                 edge_port->txfifo.count;
1364         spin_unlock_irqrestore(&edge_port->ep_lock, flags);
1365         if (num_chars) {
1366                 dev_dbg(&port->dev, "%s - returns %d\n", __func__, num_chars);
1367         }
1368
1369         return num_chars;
1370 }
1371
1372
1373 /*****************************************************************************
1374  * SerialThrottle
1375  *      this function is called by the tty driver when it wants to stop the data
1376  *      being read from the port.
1377  *****************************************************************************/
1378 static void edge_throttle(struct tty_struct *tty)
1379 {
1380         struct usb_serial_port *port = tty->driver_data;
1381         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1382         int status;
1383
1384         if (edge_port == NULL)
1385                 return;
1386
1387         if (!edge_port->open) {
1388                 dev_dbg(&port->dev, "%s - port not opened\n", __func__);
1389                 return;
1390         }
1391
1392         /* if we are implementing XON/XOFF, send the stop character */
1393         if (I_IXOFF(tty)) {
1394                 unsigned char stop_char = STOP_CHAR(tty);
1395                 status = edge_write(tty, port, &stop_char, 1);
1396                 if (status <= 0)
1397                         return;
1398         }
1399
1400         /* if we are implementing RTS/CTS, toggle that line */
1401         if (C_CRTSCTS(tty)) {
1402                 edge_port->shadowMCR &= ~MCR_RTS;
1403                 status = send_cmd_write_uart_register(edge_port, MCR,
1404                                                         edge_port->shadowMCR);
1405                 if (status != 0)
1406                         return;
1407         }
1408 }
1409
1410
1411 /*****************************************************************************
1412  * edge_unthrottle
1413  *      this function is called by the tty driver when it wants to resume the
1414  *      data being read from the port (called after SerialThrottle is called)
1415  *****************************************************************************/
1416 static void edge_unthrottle(struct tty_struct *tty)
1417 {
1418         struct usb_serial_port *port = tty->driver_data;
1419         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1420         int status;
1421
1422         if (edge_port == NULL)
1423                 return;
1424
1425         if (!edge_port->open) {
1426                 dev_dbg(&port->dev, "%s - port not opened\n", __func__);
1427                 return;
1428         }
1429
1430         /* if we are implementing XON/XOFF, send the start character */
1431         if (I_IXOFF(tty)) {
1432                 unsigned char start_char = START_CHAR(tty);
1433                 status = edge_write(tty, port, &start_char, 1);
1434                 if (status <= 0)
1435                         return;
1436         }
1437         /* if we are implementing RTS/CTS, toggle that line */
1438         if (C_CRTSCTS(tty)) {
1439                 edge_port->shadowMCR |= MCR_RTS;
1440                 send_cmd_write_uart_register(edge_port, MCR,
1441                                                 edge_port->shadowMCR);
1442         }
1443 }
1444
1445
1446 /*****************************************************************************
1447  * SerialSetTermios
1448  *      this function is called by the tty driver when it wants to change
1449  * the termios structure
1450  *****************************************************************************/
1451 static void edge_set_termios(struct tty_struct *tty,
1452         struct usb_serial_port *port, struct ktermios *old_termios)
1453 {
1454         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1455         unsigned int cflag;
1456
1457         cflag = tty->termios.c_cflag;
1458         dev_dbg(&port->dev, "%s - clfag %08x iflag %08x\n", __func__, tty->termios.c_cflag, tty->termios.c_iflag);
1459         dev_dbg(&port->dev, "%s - old clfag %08x old iflag %08x\n", __func__, old_termios->c_cflag, old_termios->c_iflag);
1460
1461         if (edge_port == NULL)
1462                 return;
1463
1464         if (!edge_port->open) {
1465                 dev_dbg(&port->dev, "%s - port not opened\n", __func__);
1466                 return;
1467         }
1468
1469         /* change the port settings to the new ones specified */
1470         change_port_settings(tty, edge_port, old_termios);
1471 }
1472
1473
1474 /*****************************************************************************
1475  * get_lsr_info - get line status register info
1476  *
1477  * Purpose: Let user call ioctl() to get info when the UART physically
1478  *          is emptied.  On bus types like RS485, the transmitter must
1479  *          release the bus after transmitting. This must be done when
1480  *          the transmit shift register is empty, not be done when the
1481  *          transmit holding register is empty.  This functionality
1482  *          allows an RS485 driver to be written in user space.
1483  *****************************************************************************/
1484 static int get_lsr_info(struct edgeport_port *edge_port,
1485                                                 unsigned int __user *value)
1486 {
1487         unsigned int result = 0;
1488         unsigned long flags;
1489
1490         spin_lock_irqsave(&edge_port->ep_lock, flags);
1491         if (edge_port->maxTxCredits == edge_port->txCredits &&
1492             edge_port->txfifo.count == 0) {
1493                 dev_dbg(&edge_port->port->dev, "%s -- Empty\n", __func__);
1494                 result = TIOCSER_TEMT;
1495         }
1496         spin_unlock_irqrestore(&edge_port->ep_lock, flags);
1497
1498         if (copy_to_user(value, &result, sizeof(int)))
1499                 return -EFAULT;
1500         return 0;
1501 }
1502
1503 static int edge_tiocmset(struct tty_struct *tty,
1504                                         unsigned int set, unsigned int clear)
1505 {
1506         struct usb_serial_port *port = tty->driver_data;
1507         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1508         unsigned int mcr;
1509
1510         mcr = edge_port->shadowMCR;
1511         if (set & TIOCM_RTS)
1512                 mcr |= MCR_RTS;
1513         if (set & TIOCM_DTR)
1514                 mcr |= MCR_DTR;
1515         if (set & TIOCM_LOOP)
1516                 mcr |= MCR_LOOPBACK;
1517
1518         if (clear & TIOCM_RTS)
1519                 mcr &= ~MCR_RTS;
1520         if (clear & TIOCM_DTR)
1521                 mcr &= ~MCR_DTR;
1522         if (clear & TIOCM_LOOP)
1523                 mcr &= ~MCR_LOOPBACK;
1524
1525         edge_port->shadowMCR = mcr;
1526
1527         send_cmd_write_uart_register(edge_port, MCR, edge_port->shadowMCR);
1528
1529         return 0;
1530 }
1531
1532 static int edge_tiocmget(struct tty_struct *tty)
1533 {
1534         struct usb_serial_port *port = tty->driver_data;
1535         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1536         unsigned int result = 0;
1537         unsigned int msr;
1538         unsigned int mcr;
1539
1540         msr = edge_port->shadowMSR;
1541         mcr = edge_port->shadowMCR;
1542         result = ((mcr & MCR_DTR)       ? TIOCM_DTR: 0)   /* 0x002 */
1543                   | ((mcr & MCR_RTS)    ? TIOCM_RTS: 0)   /* 0x004 */
1544                   | ((msr & EDGEPORT_MSR_CTS)   ? TIOCM_CTS: 0)   /* 0x020 */
1545                   | ((msr & EDGEPORT_MSR_CD)    ? TIOCM_CAR: 0)   /* 0x040 */
1546                   | ((msr & EDGEPORT_MSR_RI)    ? TIOCM_RI:  0)   /* 0x080 */
1547                   | ((msr & EDGEPORT_MSR_DSR)   ? TIOCM_DSR: 0);  /* 0x100 */
1548
1549         return result;
1550 }
1551
1552 static int get_serial_info(struct edgeport_port *edge_port,
1553                                 struct serial_struct __user *retinfo)
1554 {
1555         struct serial_struct tmp;
1556
1557         if (!retinfo)
1558                 return -EFAULT;
1559
1560         memset(&tmp, 0, sizeof(tmp));
1561
1562         tmp.type                = PORT_16550A;
1563         tmp.line                = edge_port->port->minor;
1564         tmp.port                = edge_port->port->port_number;
1565         tmp.irq                 = 0;
1566         tmp.flags               = ASYNC_SKIP_TEST | ASYNC_AUTO_IRQ;
1567         tmp.xmit_fifo_size      = edge_port->maxTxCredits;
1568         tmp.baud_base           = 9600;
1569         tmp.close_delay         = 5*HZ;
1570         tmp.closing_wait        = 30*HZ;
1571
1572         if (copy_to_user(retinfo, &tmp, sizeof(*retinfo)))
1573                 return -EFAULT;
1574         return 0;
1575 }
1576
1577
1578 /*****************************************************************************
1579  * SerialIoctl
1580  *      this function handles any ioctl calls to the driver
1581  *****************************************************************************/
1582 static int edge_ioctl(struct tty_struct *tty,
1583                                         unsigned int cmd, unsigned long arg)
1584 {
1585         struct usb_serial_port *port = tty->driver_data;
1586         DEFINE_WAIT(wait);
1587         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1588
1589         switch (cmd) {
1590         case TIOCSERGETLSR:
1591                 dev_dbg(&port->dev, "%s TIOCSERGETLSR\n", __func__);
1592                 return get_lsr_info(edge_port, (unsigned int __user *) arg);
1593
1594         case TIOCGSERIAL:
1595                 dev_dbg(&port->dev, "%s TIOCGSERIAL\n", __func__);
1596                 return get_serial_info(edge_port, (struct serial_struct __user *) arg);
1597         }
1598         return -ENOIOCTLCMD;
1599 }
1600
1601
1602 /*****************************************************************************
1603  * SerialBreak
1604  *      this function sends a break to the port
1605  *****************************************************************************/
1606 static void edge_break(struct tty_struct *tty, int break_state)
1607 {
1608         struct usb_serial_port *port = tty->driver_data;
1609         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1610         struct edgeport_serial *edge_serial = usb_get_serial_data(port->serial);
1611         int status;
1612
1613         if (!edge_serial->is_epic ||
1614             edge_serial->epic_descriptor.Supports.IOSPChase) {
1615                 /* flush and chase */
1616                 edge_port->chaseResponsePending = true;
1617
1618                 dev_dbg(&port->dev, "%s - Sending IOSP_CMD_CHASE_PORT\n", __func__);
1619                 status = send_iosp_ext_cmd(edge_port, IOSP_CMD_CHASE_PORT, 0);
1620                 if (status == 0) {
1621                         /* block until chase finished */
1622                         block_until_chase_response(edge_port);
1623                 } else {
1624                         edge_port->chaseResponsePending = false;
1625                 }
1626         }
1627
1628         if (!edge_serial->is_epic ||
1629             edge_serial->epic_descriptor.Supports.IOSPSetClrBreak) {
1630                 if (break_state == -1) {
1631                         dev_dbg(&port->dev, "%s - Sending IOSP_CMD_SET_BREAK\n", __func__);
1632                         status = send_iosp_ext_cmd(edge_port,
1633                                                 IOSP_CMD_SET_BREAK, 0);
1634                 } else {
1635                         dev_dbg(&port->dev, "%s - Sending IOSP_CMD_CLEAR_BREAK\n", __func__);
1636                         status = send_iosp_ext_cmd(edge_port,
1637                                                 IOSP_CMD_CLEAR_BREAK, 0);
1638                 }
1639                 if (status)
1640                         dev_dbg(&port->dev, "%s - error sending break set/clear command.\n",
1641                                 __func__);
1642         }
1643 }
1644
1645
1646 /*****************************************************************************
1647  * process_rcvd_data
1648  *      this function handles the data received on the bulk in pipe.
1649  *****************************************************************************/
1650 static void process_rcvd_data(struct edgeport_serial *edge_serial,
1651                                 unsigned char *buffer, __u16 bufferLength)
1652 {
1653         struct device *dev = &edge_serial->serial->dev->dev;
1654         struct usb_serial_port *port;
1655         struct edgeport_port *edge_port;
1656         __u16 lastBufferLength;
1657         __u16 rxLen;
1658
1659         lastBufferLength = bufferLength + 1;
1660
1661         while (bufferLength > 0) {
1662                 /* failsafe incase we get a message that we don't understand */
1663                 if (lastBufferLength == bufferLength) {
1664                         dev_dbg(dev, "%s - stuck in loop, exiting it.\n", __func__);
1665                         break;
1666                 }
1667                 lastBufferLength = bufferLength;
1668
1669                 switch (edge_serial->rxState) {
1670                 case EXPECT_HDR1:
1671                         edge_serial->rxHeader1 = *buffer;
1672                         ++buffer;
1673                         --bufferLength;
1674
1675                         if (bufferLength == 0) {
1676                                 edge_serial->rxState = EXPECT_HDR2;
1677                                 break;
1678                         }
1679                         /* otherwise, drop on through */
1680                 case EXPECT_HDR2:
1681                         edge_serial->rxHeader2 = *buffer;
1682                         ++buffer;
1683                         --bufferLength;
1684
1685                         dev_dbg(dev, "%s - Hdr1=%02X Hdr2=%02X\n", __func__,
1686                                 edge_serial->rxHeader1, edge_serial->rxHeader2);
1687                         /* Process depending on whether this header is
1688                          * data or status */
1689
1690                         if (IS_CMD_STAT_HDR(edge_serial->rxHeader1)) {
1691                                 /* Decode this status header and go to
1692                                  * EXPECT_HDR1 (if we can process the status
1693                                  * with only 2 bytes), or go to EXPECT_HDR3 to
1694                                  * get the third byte. */
1695                                 edge_serial->rxPort =
1696                                     IOSP_GET_HDR_PORT(edge_serial->rxHeader1);
1697                                 edge_serial->rxStatusCode =
1698                                     IOSP_GET_STATUS_CODE(
1699                                                 edge_serial->rxHeader1);
1700
1701                                 if (!IOSP_STATUS_IS_2BYTE(
1702                                                 edge_serial->rxStatusCode)) {
1703                                         /* This status needs additional bytes.
1704                                          * Save what we have and then wait for
1705                                          * more data.
1706                                          */
1707                                         edge_serial->rxStatusParam
1708                                                 = edge_serial->rxHeader2;
1709                                         edge_serial->rxState = EXPECT_HDR3;
1710                                         break;
1711                                 }
1712                                 /* We have all the header bytes, process the
1713                                    status now */
1714                                 process_rcvd_status(edge_serial,
1715                                                 edge_serial->rxHeader2, 0);
1716                                 edge_serial->rxState = EXPECT_HDR1;
1717                                 break;
1718                         } else {
1719                                 edge_serial->rxPort =
1720                                     IOSP_GET_HDR_PORT(edge_serial->rxHeader1);
1721                                 edge_serial->rxBytesRemaining =
1722                                     IOSP_GET_HDR_DATA_LEN(
1723                                                 edge_serial->rxHeader1,
1724                                                 edge_serial->rxHeader2);
1725                                 dev_dbg(dev, "%s - Data for Port %u Len %u\n",
1726                                         __func__,
1727                                         edge_serial->rxPort,
1728                                         edge_serial->rxBytesRemaining);
1729
1730                                 /* ASSERT(DevExt->RxPort < DevExt->NumPorts);
1731                                  * ASSERT(DevExt->RxBytesRemaining <
1732                                  *              IOSP_MAX_DATA_LENGTH);
1733                                  */
1734
1735                                 if (bufferLength == 0) {
1736                                         edge_serial->rxState = EXPECT_DATA;
1737                                         break;
1738                                 }
1739                                 /* Else, drop through */
1740                         }
1741                 case EXPECT_DATA: /* Expect data */
1742                         if (bufferLength < edge_serial->rxBytesRemaining) {
1743                                 rxLen = bufferLength;
1744                                 /* Expect data to start next buffer */
1745                                 edge_serial->rxState = EXPECT_DATA;
1746                         } else {
1747                                 /* BufLen >= RxBytesRemaining */
1748                                 rxLen = edge_serial->rxBytesRemaining;
1749                                 /* Start another header next time */
1750                                 edge_serial->rxState = EXPECT_HDR1;
1751                         }
1752
1753                         bufferLength -= rxLen;
1754                         edge_serial->rxBytesRemaining -= rxLen;
1755
1756                         /* spit this data back into the tty driver if this
1757                            port is open */
1758                         if (rxLen) {
1759                                 port = edge_serial->serial->port[
1760                                                         edge_serial->rxPort];
1761                                 edge_port = usb_get_serial_port_data(port);
1762                                 if (edge_port->open) {
1763                                         dev_dbg(dev, "%s - Sending %d bytes to TTY for port %d\n",
1764                                                 __func__, rxLen,
1765                                                 edge_serial->rxPort);
1766                                         edge_tty_recv(edge_port->port, buffer,
1767                                                         rxLen);
1768                                         edge_port->port->icount.rx += rxLen;
1769                                 }
1770                                 buffer += rxLen;
1771                         }
1772                         break;
1773
1774                 case EXPECT_HDR3:       /* Expect 3rd byte of status header */
1775                         edge_serial->rxHeader3 = *buffer;
1776                         ++buffer;
1777                         --bufferLength;
1778
1779                         /* We have all the header bytes, process the
1780                            status now */
1781                         process_rcvd_status(edge_serial,
1782                                 edge_serial->rxStatusParam,
1783                                 edge_serial->rxHeader3);
1784                         edge_serial->rxState = EXPECT_HDR1;
1785                         break;
1786                 }
1787         }
1788 }
1789
1790
1791 /*****************************************************************************
1792  * process_rcvd_status
1793  *      this function handles the any status messages received on the
1794  *      bulk in pipe.
1795  *****************************************************************************/
1796 static void process_rcvd_status(struct edgeport_serial *edge_serial,
1797                                                 __u8 byte2, __u8 byte3)
1798 {
1799         struct usb_serial_port *port;
1800         struct edgeport_port *edge_port;
1801         struct tty_struct *tty;
1802         struct device *dev;
1803         __u8 code = edge_serial->rxStatusCode;
1804
1805         /* switch the port pointer to the one being currently talked about */
1806         port = edge_serial->serial->port[edge_serial->rxPort];
1807         edge_port = usb_get_serial_port_data(port);
1808         if (edge_port == NULL) {
1809                 dev_err(&edge_serial->serial->dev->dev,
1810                         "%s - edge_port == NULL for port %d\n",
1811                                         __func__, edge_serial->rxPort);
1812                 return;
1813         }
1814         dev = &port->dev;
1815
1816         if (code == IOSP_EXT_STATUS) {
1817                 switch (byte2) {
1818                 case IOSP_EXT_STATUS_CHASE_RSP:
1819                         /* we want to do EXT status regardless of port
1820                          * open/closed */
1821                         dev_dbg(dev, "%s - Port %u EXT CHASE_RSP Data = %02x\n",
1822                                 __func__, edge_serial->rxPort, byte3);
1823                         /* Currently, the only EXT_STATUS is Chase, so process
1824                          * here instead of one more call to one more subroutine
1825                          * If/when more EXT_STATUS, there'll be more work to do
1826                          * Also, we currently clear flag and close the port
1827                          * regardless of content of above's Byte3.
1828                          * We could choose to do something else when Byte3 says
1829                          * Timeout on Chase from Edgeport, like wait longer in
1830                          * block_until_chase_response, but for now we don't.
1831                          */
1832                         edge_port->chaseResponsePending = false;
1833                         wake_up(&edge_port->wait_chase);
1834                         return;
1835
1836                 case IOSP_EXT_STATUS_RX_CHECK_RSP:
1837                         dev_dbg(dev, "%s ========== Port %u CHECK_RSP Sequence = %02x =============\n",
1838                                 __func__, edge_serial->rxPort, byte3);
1839                         /* Port->RxCheckRsp = true; */
1840                         return;
1841                 }
1842         }
1843
1844         if (code == IOSP_STATUS_OPEN_RSP) {
1845                 edge_port->txCredits = GET_TX_BUFFER_SIZE(byte3);
1846                 edge_port->maxTxCredits = edge_port->txCredits;
1847                 dev_dbg(dev, "%s - Port %u Open Response Initial MSR = %02x TxBufferSize = %d\n",
1848                         __func__, edge_serial->rxPort, byte2, edge_port->txCredits);
1849                 handle_new_msr(edge_port, byte2);
1850
1851                 /* send the current line settings to the port so we are
1852                    in sync with any further termios calls */
1853                 tty = tty_port_tty_get(&edge_port->port->port);
1854                 if (tty) {
1855                         change_port_settings(tty,
1856                                 edge_port, &tty->termios);
1857                         tty_kref_put(tty);
1858                 }
1859
1860                 /* we have completed the open */
1861                 edge_port->openPending = false;
1862                 edge_port->open = true;
1863                 wake_up(&edge_port->wait_open);
1864                 return;
1865         }
1866
1867         /* If port is closed, silently discard all rcvd status. We can
1868          * have cases where buffered status is received AFTER the close
1869          * port command is sent to the Edgeport.
1870          */
1871         if (!edge_port->open || edge_port->closePending)
1872                 return;
1873
1874         switch (code) {
1875         /* Not currently sent by Edgeport */
1876         case IOSP_STATUS_LSR:
1877                 dev_dbg(dev, "%s - Port %u LSR Status = %02x\n",
1878                         __func__, edge_serial->rxPort, byte2);
1879                 handle_new_lsr(edge_port, false, byte2, 0);
1880                 break;
1881
1882         case IOSP_STATUS_LSR_DATA:
1883                 dev_dbg(dev, "%s - Port %u LSR Status = %02x, Data = %02x\n",
1884                         __func__, edge_serial->rxPort, byte2, byte3);
1885                 /* byte2 is LSR Register */
1886                 /* byte3 is broken data byte */
1887                 handle_new_lsr(edge_port, true, byte2, byte3);
1888                 break;
1889         /*
1890          *      case IOSP_EXT_4_STATUS:
1891          *              dev_dbg(dev, "%s - Port %u LSR Status = %02x Data = %02x\n",
1892          *                      __func__, edge_serial->rxPort, byte2, byte3);
1893          *              break;
1894          */
1895         case IOSP_STATUS_MSR:
1896                 dev_dbg(dev, "%s - Port %u MSR Status = %02x\n",
1897                         __func__, edge_serial->rxPort, byte2);
1898                 /*
1899                  * Process this new modem status and generate appropriate
1900                  * events, etc, based on the new status. This routine
1901                  * also saves the MSR in Port->ShadowMsr.
1902                  */
1903                 handle_new_msr(edge_port, byte2);
1904                 break;
1905
1906         default:
1907                 dev_dbg(dev, "%s - Unrecognized IOSP status code %u\n", __func__, code);
1908                 break;
1909         }
1910 }
1911
1912
1913 /*****************************************************************************
1914  * edge_tty_recv
1915  *      this function passes data on to the tty flip buffer
1916  *****************************************************************************/
1917 static void edge_tty_recv(struct usb_serial_port *port, unsigned char *data,
1918                 int length)
1919 {
1920         int cnt;
1921
1922         cnt = tty_insert_flip_string(&port->port, data, length);
1923         if (cnt < length) {
1924                 dev_err(&port->dev, "%s - dropping data, %d bytes lost\n",
1925                                 __func__, length - cnt);
1926         }
1927         data += cnt;
1928         length -= cnt;
1929
1930         tty_flip_buffer_push(&port->port);
1931 }
1932
1933
1934 /*****************************************************************************
1935  * handle_new_msr
1936  *      this function handles any change to the msr register for a port.
1937  *****************************************************************************/
1938 static void handle_new_msr(struct edgeport_port *edge_port, __u8 newMsr)
1939 {
1940         struct  async_icount *icount;
1941
1942         if (newMsr & (EDGEPORT_MSR_DELTA_CTS | EDGEPORT_MSR_DELTA_DSR |
1943                         EDGEPORT_MSR_DELTA_RI | EDGEPORT_MSR_DELTA_CD)) {
1944                 icount = &edge_port->port->icount;
1945
1946                 /* update input line counters */
1947                 if (newMsr & EDGEPORT_MSR_DELTA_CTS)
1948                         icount->cts++;
1949                 if (newMsr & EDGEPORT_MSR_DELTA_DSR)
1950                         icount->dsr++;
1951                 if (newMsr & EDGEPORT_MSR_DELTA_CD)
1952                         icount->dcd++;
1953                 if (newMsr & EDGEPORT_MSR_DELTA_RI)
1954                         icount->rng++;
1955                 wake_up_interruptible(&edge_port->port->port.delta_msr_wait);
1956         }
1957
1958         /* Save the new modem status */
1959         edge_port->shadowMSR = newMsr & 0xf0;
1960 }
1961
1962
1963 /*****************************************************************************
1964  * handle_new_lsr
1965  *      this function handles any change to the lsr register for a port.
1966  *****************************************************************************/
1967 static void handle_new_lsr(struct edgeport_port *edge_port, __u8 lsrData,
1968                                                         __u8 lsr, __u8 data)
1969 {
1970         __u8 newLsr = (__u8) (lsr & (__u8)
1971                 (LSR_OVER_ERR | LSR_PAR_ERR | LSR_FRM_ERR | LSR_BREAK));
1972         struct async_icount *icount;
1973
1974         edge_port->shadowLSR = lsr;
1975
1976         if (newLsr & LSR_BREAK) {
1977                 /*
1978                  * Parity and Framing errors only count if they
1979                  * occur exclusive of a break being
1980                  * received.
1981                  */
1982                 newLsr &= (__u8)(LSR_OVER_ERR | LSR_BREAK);
1983         }
1984
1985         /* Place LSR data byte into Rx buffer */
1986         if (lsrData)
1987                 edge_tty_recv(edge_port->port, &data, 1);
1988
1989         /* update input line counters */
1990         icount = &edge_port->port->icount;
1991         if (newLsr & LSR_BREAK)
1992                 icount->brk++;
1993         if (newLsr & LSR_OVER_ERR)
1994                 icount->overrun++;
1995         if (newLsr & LSR_PAR_ERR)
1996                 icount->parity++;
1997         if (newLsr & LSR_FRM_ERR)
1998                 icount->frame++;
1999 }
2000
2001
2002 /****************************************************************************
2003  * sram_write
2004  *      writes a number of bytes to the Edgeport device's sram starting at the
2005  *      given address.
2006  *      If successful returns the number of bytes written, otherwise it returns
2007  *      a negative error number of the problem.
2008  ****************************************************************************/
2009 static int sram_write(struct usb_serial *serial, __u16 extAddr, __u16 addr,
2010                                         __u16 length, const __u8 *data)
2011 {
2012         int result;
2013         __u16 current_length;
2014         unsigned char *transfer_buffer;
2015
2016         dev_dbg(&serial->dev->dev, "%s - %x, %x, %d\n", __func__, extAddr, addr, length);
2017
2018         transfer_buffer =  kmalloc(64, GFP_KERNEL);
2019         if (!transfer_buffer)
2020                 return -ENOMEM;
2021
2022         /* need to split these writes up into 64 byte chunks */
2023         result = 0;
2024         while (length > 0) {
2025                 if (length > 64)
2026                         current_length = 64;
2027                 else
2028                         current_length = length;
2029
2030 /*              dev_dbg(&serial->dev->dev, "%s - writing %x, %x, %d\n", __func__, extAddr, addr, current_length); */
2031                 memcpy(transfer_buffer, data, current_length);
2032                 result = usb_control_msg(serial->dev,
2033                                         usb_sndctrlpipe(serial->dev, 0),
2034                                         USB_REQUEST_ION_WRITE_RAM,
2035                                         0x40, addr, extAddr, transfer_buffer,
2036                                         current_length, 300);
2037                 if (result < 0)
2038                         break;
2039                 length -= current_length;
2040                 addr += current_length;
2041                 data += current_length;
2042         }
2043
2044         kfree(transfer_buffer);
2045         return result;
2046 }
2047
2048
2049 /****************************************************************************
2050  * rom_write
2051  *      writes a number of bytes to the Edgeport device's ROM starting at the
2052  *      given address.
2053  *      If successful returns the number of bytes written, otherwise it returns
2054  *      a negative error number of the problem.
2055  ****************************************************************************/
2056 static int rom_write(struct usb_serial *serial, __u16 extAddr, __u16 addr,
2057                                         __u16 length, const __u8 *data)
2058 {
2059         int result;
2060         __u16 current_length;
2061         unsigned char *transfer_buffer;
2062
2063         transfer_buffer =  kmalloc(64, GFP_KERNEL);
2064         if (!transfer_buffer)
2065                 return -ENOMEM;
2066
2067         /* need to split these writes up into 64 byte chunks */
2068         result = 0;
2069         while (length > 0) {
2070                 if (length > 64)
2071                         current_length = 64;
2072                 else
2073                         current_length = length;
2074                 memcpy(transfer_buffer, data, current_length);
2075                 result = usb_control_msg(serial->dev,
2076                                         usb_sndctrlpipe(serial->dev, 0),
2077                                         USB_REQUEST_ION_WRITE_ROM, 0x40,
2078                                         addr, extAddr,
2079                                         transfer_buffer, current_length, 300);
2080                 if (result < 0)
2081                         break;
2082                 length -= current_length;
2083                 addr += current_length;
2084                 data += current_length;
2085         }
2086
2087         kfree(transfer_buffer);
2088         return result;
2089 }
2090
2091
2092 /****************************************************************************
2093  * rom_read
2094  *      reads a number of bytes from the Edgeport device starting at the given
2095  *      address.
2096  *      If successful returns the number of bytes read, otherwise it returns
2097  *      a negative error number of the problem.
2098  ****************************************************************************/
2099 static int rom_read(struct usb_serial *serial, __u16 extAddr,
2100                                         __u16 addr, __u16 length, __u8 *data)
2101 {
2102         int result;
2103         __u16 current_length;
2104         unsigned char *transfer_buffer;
2105
2106         transfer_buffer =  kmalloc(64, GFP_KERNEL);
2107         if (!transfer_buffer)
2108                 return -ENOMEM;
2109
2110         /* need to split these reads up into 64 byte chunks */
2111         result = 0;
2112         while (length > 0) {
2113                 if (length > 64)
2114                         current_length = 64;
2115                 else
2116                         current_length = length;
2117                 result = usb_control_msg(serial->dev,
2118                                         usb_rcvctrlpipe(serial->dev, 0),
2119                                         USB_REQUEST_ION_READ_ROM,
2120                                         0xC0, addr, extAddr, transfer_buffer,
2121                                         current_length, 300);
2122                 if (result < 0)
2123                         break;
2124                 memcpy(data, transfer_buffer, current_length);
2125                 length -= current_length;
2126                 addr += current_length;
2127                 data += current_length;
2128         }
2129
2130         kfree(transfer_buffer);
2131         return result;
2132 }
2133
2134
2135 /****************************************************************************
2136  * send_iosp_ext_cmd
2137  *      Is used to send a IOSP message to the Edgeport device
2138  ****************************************************************************/
2139 static int send_iosp_ext_cmd(struct edgeport_port *edge_port,
2140                                                 __u8 command, __u8 param)
2141 {
2142         unsigned char   *buffer;
2143         unsigned char   *currentCommand;
2144         int             length = 0;
2145         int             status = 0;
2146
2147         buffer = kmalloc(10, GFP_ATOMIC);
2148         if (!buffer)
2149                 return -ENOMEM;
2150
2151         currentCommand = buffer;
2152
2153         MAKE_CMD_EXT_CMD(&currentCommand, &length, edge_port->port->port_number,
2154                          command, param);
2155
2156         status = write_cmd_usb(edge_port, buffer, length);
2157         if (status) {
2158                 /* something bad happened, let's free up the memory */
2159                 kfree(buffer);
2160         }
2161
2162         return status;
2163 }
2164
2165
2166 /*****************************************************************************
2167  * write_cmd_usb
2168  *      this function writes the given buffer out to the bulk write endpoint.
2169  *****************************************************************************/
2170 static int write_cmd_usb(struct edgeport_port *edge_port,
2171                                         unsigned char *buffer, int length)
2172 {
2173         struct edgeport_serial *edge_serial =
2174                                 usb_get_serial_data(edge_port->port->serial);
2175         struct device *dev = &edge_port->port->dev;
2176         int status = 0;
2177         struct urb *urb;
2178
2179         usb_serial_debug_data(dev, __func__, length, buffer);
2180
2181         /* Allocate our next urb */
2182         urb = usb_alloc_urb(0, GFP_ATOMIC);
2183         if (!urb)
2184                 return -ENOMEM;
2185
2186         atomic_inc(&CmdUrbs);
2187         dev_dbg(dev, "%s - ALLOCATE URB %p (outstanding %d)\n",
2188                 __func__, urb, atomic_read(&CmdUrbs));
2189
2190         usb_fill_bulk_urb(urb, edge_serial->serial->dev,
2191                         usb_sndbulkpipe(edge_serial->serial->dev,
2192                                         edge_serial->bulk_out_endpoint),
2193                         buffer, length, edge_bulk_out_cmd_callback, edge_port);
2194
2195         edge_port->commandPending = true;
2196         status = usb_submit_urb(urb, GFP_ATOMIC);
2197
2198         if (status) {
2199                 /* something went wrong */
2200                 dev_err(dev, "%s - usb_submit_urb(write command) failed, status = %d\n",
2201                         __func__, status);
2202                 usb_kill_urb(urb);
2203                 usb_free_urb(urb);
2204                 atomic_dec(&CmdUrbs);
2205                 return status;
2206         }
2207
2208 #if 0
2209         wait_event(&edge_port->wait_command, !edge_port->commandPending);
2210
2211         if (edge_port->commandPending) {
2212                 /* command timed out */
2213                 dev_dbg(dev, "%s - command timed out\n", __func__);
2214                 status = -EINVAL;
2215         }
2216 #endif
2217         return status;
2218 }
2219
2220
2221 /*****************************************************************************
2222  * send_cmd_write_baud_rate
2223  *      this function sends the proper command to change the baud rate of the
2224  *      specified port.
2225  *****************************************************************************/
2226 static int send_cmd_write_baud_rate(struct edgeport_port *edge_port,
2227                                                                 int baudRate)
2228 {
2229         struct edgeport_serial *edge_serial =
2230                                 usb_get_serial_data(edge_port->port->serial);
2231         struct device *dev = &edge_port->port->dev;
2232         unsigned char *cmdBuffer;
2233         unsigned char *currCmd;
2234         int cmdLen = 0;
2235         int divisor;
2236         int status;
2237         u32 number = edge_port->port->port_number;
2238
2239         if (edge_serial->is_epic &&
2240             !edge_serial->epic_descriptor.Supports.IOSPSetBaudRate) {
2241                 dev_dbg(dev, "SendCmdWriteBaudRate - NOT Setting baud rate for port, baud = %d\n",
2242                         baudRate);
2243                 return 0;
2244         }
2245
2246         dev_dbg(dev, "%s - baud = %d\n", __func__, baudRate);
2247
2248         status = calc_baud_rate_divisor(dev, baudRate, &divisor);
2249         if (status) {
2250                 dev_err(dev, "%s - bad baud rate\n", __func__);
2251                 return status;
2252         }
2253
2254         /* Alloc memory for the string of commands. */
2255         cmdBuffer =  kmalloc(0x100, GFP_ATOMIC);
2256         if (!cmdBuffer)
2257                 return -ENOMEM;
2258
2259         currCmd = cmdBuffer;
2260
2261         /* Enable access to divisor latch */
2262         MAKE_CMD_WRITE_REG(&currCmd, &cmdLen, number, LCR, LCR_DL_ENABLE);
2263
2264         /* Write the divisor itself */
2265         MAKE_CMD_WRITE_REG(&currCmd, &cmdLen, number, DLL, LOW8(divisor));
2266         MAKE_CMD_WRITE_REG(&currCmd, &cmdLen, number, DLM, HIGH8(divisor));
2267
2268         /* Restore original value to disable access to divisor latch */
2269         MAKE_CMD_WRITE_REG(&currCmd, &cmdLen, number, LCR,
2270                                                 edge_port->shadowLCR);
2271
2272         status = write_cmd_usb(edge_port, cmdBuffer, cmdLen);
2273         if (status) {
2274                 /* something bad happened, let's free up the memory */
2275                 kfree(cmdBuffer);
2276         }
2277
2278         return status;
2279 }
2280
2281
2282 /*****************************************************************************
2283  * calc_baud_rate_divisor
2284  *      this function calculates the proper baud rate divisor for the specified
2285  *      baud rate.
2286  *****************************************************************************/
2287 static int calc_baud_rate_divisor(struct device *dev, int baudrate, int *divisor)
2288 {
2289         int i;
2290         __u16 custom;
2291
2292         for (i = 0; i < ARRAY_SIZE(divisor_table); i++) {
2293                 if (divisor_table[i].BaudRate == baudrate) {
2294                         *divisor = divisor_table[i].Divisor;
2295                         return 0;
2296                 }
2297         }
2298
2299         /* We have tried all of the standard baud rates
2300          * lets try to calculate the divisor for this baud rate
2301          * Make sure the baud rate is reasonable */
2302         if (baudrate > 50 && baudrate < 230400) {
2303                 /* get divisor */
2304                 custom = (__u16)((230400L + baudrate/2) / baudrate);
2305
2306                 *divisor = custom;
2307
2308                 dev_dbg(dev, "%s - Baud %d = %d\n", __func__, baudrate, custom);
2309                 return 0;
2310         }
2311
2312         return -1;
2313 }
2314
2315
2316 /*****************************************************************************
2317  * send_cmd_write_uart_register
2318  *  this function builds up a uart register message and sends to the device.
2319  *****************************************************************************/
2320 static int send_cmd_write_uart_register(struct edgeport_port *edge_port,
2321                                                 __u8 regNum, __u8 regValue)
2322 {
2323         struct edgeport_serial *edge_serial =
2324                                 usb_get_serial_data(edge_port->port->serial);
2325         struct device *dev = &edge_port->port->dev;
2326         unsigned char *cmdBuffer;
2327         unsigned char *currCmd;
2328         unsigned long cmdLen = 0;
2329         int status;
2330
2331         dev_dbg(dev, "%s - write to %s register 0x%02x\n",
2332                 (regNum == MCR) ? "MCR" : "LCR", __func__, regValue);
2333
2334         if (edge_serial->is_epic &&
2335             !edge_serial->epic_descriptor.Supports.IOSPWriteMCR &&
2336             regNum == MCR) {
2337                 dev_dbg(dev, "SendCmdWriteUartReg - Not writing to MCR Register\n");
2338                 return 0;
2339         }
2340
2341         if (edge_serial->is_epic &&
2342             !edge_serial->epic_descriptor.Supports.IOSPWriteLCR &&
2343             regNum == LCR) {
2344                 dev_dbg(dev, "SendCmdWriteUartReg - Not writing to LCR Register\n");
2345                 return 0;
2346         }
2347
2348         /* Alloc memory for the string of commands. */
2349         cmdBuffer = kmalloc(0x10, GFP_ATOMIC);
2350         if (cmdBuffer == NULL)
2351                 return -ENOMEM;
2352
2353         currCmd = cmdBuffer;
2354
2355         /* Build a cmd in the buffer to write the given register */
2356         MAKE_CMD_WRITE_REG(&currCmd, &cmdLen, edge_port->port->port_number,
2357                            regNum, regValue);
2358
2359         status = write_cmd_usb(edge_port, cmdBuffer, cmdLen);
2360         if (status) {
2361                 /* something bad happened, let's free up the memory */
2362                 kfree(cmdBuffer);
2363         }
2364
2365         return status;
2366 }
2367
2368
2369 /*****************************************************************************
2370  * change_port_settings
2371  *      This routine is called to set the UART on the device to match the
2372  *      specified new settings.
2373  *****************************************************************************/
2374
2375 static void change_port_settings(struct tty_struct *tty,
2376         struct edgeport_port *edge_port, struct ktermios *old_termios)
2377 {
2378         struct device *dev = &edge_port->port->dev;
2379         struct edgeport_serial *edge_serial =
2380                         usb_get_serial_data(edge_port->port->serial);
2381         int baud;
2382         unsigned cflag;
2383         __u8 mask = 0xff;
2384         __u8 lData;
2385         __u8 lParity;
2386         __u8 lStop;
2387         __u8 rxFlow;
2388         __u8 txFlow;
2389         int status;
2390
2391         if (!edge_port->open &&
2392             !edge_port->openPending) {
2393                 dev_dbg(dev, "%s - port not opened\n", __func__);
2394                 return;
2395         }
2396
2397         cflag = tty->termios.c_cflag;
2398
2399         switch (cflag & CSIZE) {
2400         case CS5:
2401                 lData = LCR_BITS_5; mask = 0x1f;
2402                 dev_dbg(dev, "%s - data bits = 5\n", __func__);
2403                 break;
2404         case CS6:
2405                 lData = LCR_BITS_6; mask = 0x3f;
2406                 dev_dbg(dev, "%s - data bits = 6\n", __func__);
2407                 break;
2408         case CS7:
2409                 lData = LCR_BITS_7; mask = 0x7f;
2410                 dev_dbg(dev, "%s - data bits = 7\n", __func__);
2411                 break;
2412         default:
2413         case CS8:
2414                 lData = LCR_BITS_8;
2415                 dev_dbg(dev, "%s - data bits = 8\n", __func__);
2416                 break;
2417         }
2418
2419         lParity = LCR_PAR_NONE;
2420         if (cflag & PARENB) {
2421                 if (cflag & CMSPAR) {
2422                         if (cflag & PARODD) {
2423                                 lParity = LCR_PAR_MARK;
2424                                 dev_dbg(dev, "%s - parity = mark\n", __func__);
2425                         } else {
2426                                 lParity = LCR_PAR_SPACE;
2427                                 dev_dbg(dev, "%s - parity = space\n", __func__);
2428                         }
2429                 } else if (cflag & PARODD) {
2430                         lParity = LCR_PAR_ODD;
2431                         dev_dbg(dev, "%s - parity = odd\n", __func__);
2432                 } else {
2433                         lParity = LCR_PAR_EVEN;
2434                         dev_dbg(dev, "%s - parity = even\n", __func__);
2435                 }
2436         } else {
2437                 dev_dbg(dev, "%s - parity = none\n", __func__);
2438         }
2439
2440         if (cflag & CSTOPB) {
2441                 lStop = LCR_STOP_2;
2442                 dev_dbg(dev, "%s - stop bits = 2\n", __func__);
2443         } else {
2444                 lStop = LCR_STOP_1;
2445                 dev_dbg(dev, "%s - stop bits = 1\n", __func__);
2446         }
2447
2448         /* figure out the flow control settings */
2449         rxFlow = txFlow = 0x00;
2450         if (cflag & CRTSCTS) {
2451                 rxFlow |= IOSP_RX_FLOW_RTS;
2452                 txFlow |= IOSP_TX_FLOW_CTS;
2453                 dev_dbg(dev, "%s - RTS/CTS is enabled\n", __func__);
2454         } else {
2455                 dev_dbg(dev, "%s - RTS/CTS is disabled\n", __func__);
2456         }
2457
2458         /* if we are implementing XON/XOFF, set the start and stop character
2459            in the device */
2460         if (I_IXOFF(tty) || I_IXON(tty)) {
2461                 unsigned char stop_char  = STOP_CHAR(tty);
2462                 unsigned char start_char = START_CHAR(tty);
2463
2464                 if (!edge_serial->is_epic ||
2465                     edge_serial->epic_descriptor.Supports.IOSPSetXChar) {
2466                         send_iosp_ext_cmd(edge_port,
2467                                         IOSP_CMD_SET_XON_CHAR, start_char);
2468                         send_iosp_ext_cmd(edge_port,
2469                                         IOSP_CMD_SET_XOFF_CHAR, stop_char);
2470                 }
2471
2472                 /* if we are implementing INBOUND XON/XOFF */
2473                 if (I_IXOFF(tty)) {
2474                         rxFlow |= IOSP_RX_FLOW_XON_XOFF;
2475                         dev_dbg(dev, "%s - INBOUND XON/XOFF is enabled, XON = %2x, XOFF = %2x\n",
2476                                 __func__, start_char, stop_char);
2477                 } else {
2478                         dev_dbg(dev, "%s - INBOUND XON/XOFF is disabled\n", __func__);
2479                 }
2480
2481                 /* if we are implementing OUTBOUND XON/XOFF */
2482                 if (I_IXON(tty)) {
2483                         txFlow |= IOSP_TX_FLOW_XON_XOFF;
2484                         dev_dbg(dev, "%s - OUTBOUND XON/XOFF is enabled, XON = %2x, XOFF = %2x\n",
2485                                 __func__, start_char, stop_char);
2486                 } else {
2487                         dev_dbg(dev, "%s - OUTBOUND XON/XOFF is disabled\n", __func__);
2488                 }
2489         }
2490
2491         /* Set flow control to the configured value */
2492         if (!edge_serial->is_epic ||
2493             edge_serial->epic_descriptor.Supports.IOSPSetRxFlow)
2494                 send_iosp_ext_cmd(edge_port, IOSP_CMD_SET_RX_FLOW, rxFlow);
2495         if (!edge_serial->is_epic ||
2496             edge_serial->epic_descriptor.Supports.IOSPSetTxFlow)
2497                 send_iosp_ext_cmd(edge_port, IOSP_CMD_SET_TX_FLOW, txFlow);
2498
2499
2500         edge_port->shadowLCR &= ~(LCR_BITS_MASK | LCR_STOP_MASK | LCR_PAR_MASK);
2501         edge_port->shadowLCR |= (lData | lParity | lStop);
2502
2503         edge_port->validDataMask = mask;
2504
2505         /* Send the updated LCR value to the EdgePort */
2506         status = send_cmd_write_uart_register(edge_port, LCR,
2507                                                         edge_port->shadowLCR);
2508         if (status != 0)
2509                 return;
2510
2511         /* set up the MCR register and send it to the EdgePort */
2512         edge_port->shadowMCR = MCR_MASTER_IE;
2513         if (cflag & CBAUD)
2514                 edge_port->shadowMCR |= (MCR_DTR | MCR_RTS);
2515
2516         status = send_cmd_write_uart_register(edge_port, MCR,
2517                                                 edge_port->shadowMCR);
2518         if (status != 0)
2519                 return;
2520
2521         /* Determine divisor based on baud rate */
2522         baud = tty_get_baud_rate(tty);
2523         if (!baud) {
2524                 /* pick a default, any default... */
2525                 baud = 9600;
2526         }
2527
2528         dev_dbg(dev, "%s - baud rate = %d\n", __func__, baud);
2529         status = send_cmd_write_baud_rate(edge_port, baud);
2530         if (status == -1) {
2531                 /* Speed change was not possible - put back the old speed */
2532                 baud = tty_termios_baud_rate(old_termios);
2533                 tty_encode_baud_rate(tty, baud, baud);
2534         }
2535 }
2536
2537
2538 /****************************************************************************
2539  * unicode_to_ascii
2540  *      Turns a string from Unicode into ASCII.
2541  *      Doesn't do a good job with any characters that are outside the normal
2542  *      ASCII range, but it's only for debugging...
2543  *      NOTE: expects the unicode in LE format
2544  ****************************************************************************/
2545 static void unicode_to_ascii(char *string, int buflen,
2546                                         __le16 *unicode, int unicode_size)
2547 {
2548         int i;
2549
2550         if (buflen <= 0)        /* never happens, but... */
2551                 return;
2552         --buflen;               /* space for nul */
2553
2554         for (i = 0; i < unicode_size; i++) {
2555                 if (i >= buflen)
2556                         break;
2557                 string[i] = (char)(le16_to_cpu(unicode[i]));
2558         }
2559         string[i] = 0x00;
2560 }
2561
2562
2563 /****************************************************************************
2564  * get_manufacturing_desc
2565  *      reads in the manufacturing descriptor and stores it into the serial
2566  *      structure.
2567  ****************************************************************************/
2568 static void get_manufacturing_desc(struct edgeport_serial *edge_serial)
2569 {
2570         struct device *dev = &edge_serial->serial->dev->dev;
2571         int response;
2572
2573         dev_dbg(dev, "getting manufacturer descriptor\n");
2574
2575         response = rom_read(edge_serial->serial,
2576                                 (EDGE_MANUF_DESC_ADDR & 0xffff0000) >> 16,
2577                                 (__u16)(EDGE_MANUF_DESC_ADDR & 0x0000ffff),
2578                                 EDGE_MANUF_DESC_LEN,
2579                                 (__u8 *)(&edge_serial->manuf_descriptor));
2580
2581         if (response < 1)
2582                 dev_err(dev, "error in getting manufacturer descriptor\n");
2583         else {
2584                 char string[30];
2585                 dev_dbg(dev, "**Manufacturer Descriptor\n");
2586                 dev_dbg(dev, "  RomSize:        %dK\n",
2587                         edge_serial->manuf_descriptor.RomSize);
2588                 dev_dbg(dev, "  RamSize:        %dK\n",
2589                         edge_serial->manuf_descriptor.RamSize);
2590                 dev_dbg(dev, "  CpuRev:         %d\n",
2591                         edge_serial->manuf_descriptor.CpuRev);
2592                 dev_dbg(dev, "  BoardRev:       %d\n",
2593                         edge_serial->manuf_descriptor.BoardRev);
2594                 dev_dbg(dev, "  NumPorts:       %d\n",
2595                         edge_serial->manuf_descriptor.NumPorts);
2596                 dev_dbg(dev, "  DescDate:       %d/%d/%d\n",
2597                         edge_serial->manuf_descriptor.DescDate[0],
2598                         edge_serial->manuf_descriptor.DescDate[1],
2599                         edge_serial->manuf_descriptor.DescDate[2]+1900);
2600                 unicode_to_ascii(string, sizeof(string),
2601                         edge_serial->manuf_descriptor.SerialNumber,
2602                         edge_serial->manuf_descriptor.SerNumLength/2);
2603                 dev_dbg(dev, "  SerialNumber: %s\n", string);
2604                 unicode_to_ascii(string, sizeof(string),
2605                         edge_serial->manuf_descriptor.AssemblyNumber,
2606                         edge_serial->manuf_descriptor.AssemblyNumLength/2);
2607                 dev_dbg(dev, "  AssemblyNumber: %s\n", string);
2608                 unicode_to_ascii(string, sizeof(string),
2609                     edge_serial->manuf_descriptor.OemAssyNumber,
2610                     edge_serial->manuf_descriptor.OemAssyNumLength/2);
2611                 dev_dbg(dev, "  OemAssyNumber:  %s\n", string);
2612                 dev_dbg(dev, "  UartType:       %d\n",
2613                         edge_serial->manuf_descriptor.UartType);
2614                 dev_dbg(dev, "  IonPid:         %d\n",
2615                         edge_serial->manuf_descriptor.IonPid);
2616                 dev_dbg(dev, "  IonConfig:      %d\n",
2617                         edge_serial->manuf_descriptor.IonConfig);
2618         }
2619 }
2620
2621
2622 /****************************************************************************
2623  * get_boot_desc
2624  *      reads in the bootloader descriptor and stores it into the serial
2625  *      structure.
2626  ****************************************************************************/
2627 static void get_boot_desc(struct edgeport_serial *edge_serial)
2628 {
2629         struct device *dev = &edge_serial->serial->dev->dev;
2630         int response;
2631
2632         dev_dbg(dev, "getting boot descriptor\n");
2633
2634         response = rom_read(edge_serial->serial,
2635                                 (EDGE_BOOT_DESC_ADDR & 0xffff0000) >> 16,
2636                                 (__u16)(EDGE_BOOT_DESC_ADDR & 0x0000ffff),
2637                                 EDGE_BOOT_DESC_LEN,
2638                                 (__u8 *)(&edge_serial->boot_descriptor));
2639
2640         if (response < 1)
2641                 dev_err(dev, "error in getting boot descriptor\n");
2642         else {
2643                 dev_dbg(dev, "**Boot Descriptor:\n");
2644                 dev_dbg(dev, "  BootCodeLength: %d\n",
2645                         le16_to_cpu(edge_serial->boot_descriptor.BootCodeLength));
2646                 dev_dbg(dev, "  MajorVersion:   %d\n",
2647                         edge_serial->boot_descriptor.MajorVersion);
2648                 dev_dbg(dev, "  MinorVersion:   %d\n",
2649                         edge_serial->boot_descriptor.MinorVersion);
2650                 dev_dbg(dev, "  BuildNumber:    %d\n",
2651                         le16_to_cpu(edge_serial->boot_descriptor.BuildNumber));
2652                 dev_dbg(dev, "  Capabilities:   0x%x\n",
2653                       le16_to_cpu(edge_serial->boot_descriptor.Capabilities));
2654                 dev_dbg(dev, "  UConfig0:       %d\n",
2655                         edge_serial->boot_descriptor.UConfig0);
2656                 dev_dbg(dev, "  UConfig1:       %d\n",
2657                         edge_serial->boot_descriptor.UConfig1);
2658         }
2659 }
2660
2661
2662 /****************************************************************************
2663  * load_application_firmware
2664  *      This is called to load the application firmware to the device
2665  ****************************************************************************/
2666 static void load_application_firmware(struct edgeport_serial *edge_serial)
2667 {
2668         struct device *dev = &edge_serial->serial->dev->dev;
2669         const struct ihex_binrec *rec;
2670         const struct firmware *fw;
2671         const char *fw_name;
2672         const char *fw_info;
2673         int response;
2674         __u32 Operaddr;
2675         __u16 build;
2676
2677         switch (edge_serial->product_info.iDownloadFile) {
2678                 case EDGE_DOWNLOAD_FILE_I930:
2679                         fw_info = "downloading firmware version (930)";
2680                         fw_name = "edgeport/down.fw";
2681                         break;
2682
2683                 case EDGE_DOWNLOAD_FILE_80251:
2684                         fw_info = "downloading firmware version (80251)";
2685                         fw_name = "edgeport/down2.fw";
2686                         break;
2687
2688                 case EDGE_DOWNLOAD_FILE_NONE:
2689                         dev_dbg(dev, "No download file specified, skipping download\n");
2690                         return;
2691
2692                 default:
2693                         return;
2694         }
2695
2696         response = request_ihex_firmware(&fw, fw_name,
2697                                     &edge_serial->serial->dev->dev);
2698         if (response) {
2699                 dev_err(dev, "Failed to load image \"%s\" err %d\n",
2700                        fw_name, response);
2701                 return;
2702         }
2703
2704         rec = (const struct ihex_binrec *)fw->data;
2705         build = (rec->data[2] << 8) | rec->data[3];
2706
2707         dev_dbg(dev, "%s %d.%d.%d\n", fw_info, rec->data[0], rec->data[1], build);
2708
2709         edge_serial->product_info.FirmwareMajorVersion = rec->data[0];
2710         edge_serial->product_info.FirmwareMinorVersion = rec->data[1];
2711         edge_serial->product_info.FirmwareBuildNumber = cpu_to_le16(build);
2712
2713         for (rec = ihex_next_binrec(rec); rec;
2714              rec = ihex_next_binrec(rec)) {
2715                 Operaddr = be32_to_cpu(rec->addr);
2716                 response = sram_write(edge_serial->serial,
2717                                      Operaddr >> 16,
2718                                      Operaddr & 0xFFFF,
2719                                      be16_to_cpu(rec->len),
2720                                      &rec->data[0]);
2721                 if (response < 0) {
2722                         dev_err(&edge_serial->serial->dev->dev,
2723                                 "sram_write failed (%x, %x, %d)\n",
2724                                 Operaddr >> 16, Operaddr & 0xFFFF,
2725                                 be16_to_cpu(rec->len));
2726                         break;
2727                 }
2728         }
2729
2730         dev_dbg(dev, "sending exec_dl_code\n");
2731         response = usb_control_msg (edge_serial->serial->dev,
2732                                     usb_sndctrlpipe(edge_serial->serial->dev, 0),
2733                                     USB_REQUEST_ION_EXEC_DL_CODE,
2734                                     0x40, 0x4000, 0x0001, NULL, 0, 3000);
2735
2736         release_firmware(fw);
2737 }
2738
2739
2740 /****************************************************************************
2741  * edge_startup
2742  ****************************************************************************/
2743 static int edge_startup(struct usb_serial *serial)
2744 {
2745         struct edgeport_serial *edge_serial;
2746         struct usb_device *dev;
2747         struct device *ddev = &serial->dev->dev;
2748         int i;
2749         int response;
2750         bool interrupt_in_found;
2751         bool bulk_in_found;
2752         bool bulk_out_found;
2753         static __u32 descriptor[3] = {  EDGE_COMPATIBILITY_MASK0,
2754                                         EDGE_COMPATIBILITY_MASK1,
2755                                         EDGE_COMPATIBILITY_MASK2 };
2756
2757         dev = serial->dev;
2758
2759         /* create our private serial structure */
2760         edge_serial = kzalloc(sizeof(struct edgeport_serial), GFP_KERNEL);
2761         if (!edge_serial)
2762                 return -ENOMEM;
2763
2764         spin_lock_init(&edge_serial->es_lock);
2765         edge_serial->serial = serial;
2766         usb_set_serial_data(serial, edge_serial);
2767
2768         /* get the name for the device from the device */
2769         i = usb_string(dev, dev->descriptor.iManufacturer,
2770             &edge_serial->name[0], MAX_NAME_LEN+1);
2771         if (i < 0)
2772                 i = 0;
2773         edge_serial->name[i++] = ' ';
2774         usb_string(dev, dev->descriptor.iProduct,
2775             &edge_serial->name[i], MAX_NAME_LEN+2 - i);
2776
2777         dev_info(&serial->dev->dev, "%s detected\n", edge_serial->name);
2778
2779         /* Read the epic descriptor */
2780         if (get_epic_descriptor(edge_serial) <= 0) {
2781                 /* memcpy descriptor to Supports structures */
2782                 memcpy(&edge_serial->epic_descriptor.Supports, descriptor,
2783                        sizeof(struct edge_compatibility_bits));
2784
2785                 /* get the manufacturing descriptor for this device */
2786                 get_manufacturing_desc(edge_serial);
2787
2788                 /* get the boot descriptor */
2789                 get_boot_desc(edge_serial);
2790
2791                 get_product_info(edge_serial);
2792         }
2793
2794         /* set the number of ports from the manufacturing description */
2795         /* serial->num_ports = serial->product_info.NumPorts; */
2796         if ((!edge_serial->is_epic) &&
2797             (edge_serial->product_info.NumPorts != serial->num_ports)) {
2798                 dev_warn(ddev,
2799                         "Device Reported %d serial ports vs. core thinking we have %d ports, email greg@kroah.com this information.\n",
2800                          edge_serial->product_info.NumPorts,
2801                          serial->num_ports);
2802         }
2803
2804         dev_dbg(ddev, "%s - time 1 %ld\n", __func__, jiffies);
2805
2806         /* If not an EPiC device */
2807         if (!edge_serial->is_epic) {
2808                 /* now load the application firmware into this device */
2809                 load_application_firmware(edge_serial);
2810
2811                 dev_dbg(ddev, "%s - time 2 %ld\n", __func__, jiffies);
2812
2813                 /* Check current Edgeport EEPROM and update if necessary */
2814                 update_edgeport_E2PROM(edge_serial);
2815
2816                 dev_dbg(ddev, "%s - time 3 %ld\n", __func__, jiffies);
2817
2818                 /* set the configuration to use #1 */
2819 /*              dev_dbg(ddev, "set_configuration 1\n"); */
2820 /*              usb_set_configuration (dev, 1); */
2821         }
2822         dev_dbg(ddev, "  FirmwareMajorVersion  %d.%d.%d\n",
2823             edge_serial->product_info.FirmwareMajorVersion,
2824             edge_serial->product_info.FirmwareMinorVersion,
2825             le16_to_cpu(edge_serial->product_info.FirmwareBuildNumber));
2826
2827         /* we set up the pointers to the endpoints in the edge_open function,
2828          * as the structures aren't created yet. */
2829
2830         response = 0;
2831
2832         if (edge_serial->is_epic) {
2833                 /* EPIC thing, set up our interrupt polling now and our read
2834                  * urb, so that the device knows it really is connected. */
2835                 interrupt_in_found = bulk_in_found = bulk_out_found = false;
2836                 for (i = 0; i < serial->interface->altsetting[0]
2837                                                 .desc.bNumEndpoints; ++i) {
2838                         struct usb_endpoint_descriptor *endpoint;
2839                         int buffer_size;
2840
2841                         endpoint = &serial->interface->altsetting[0].
2842                                                         endpoint[i].desc;
2843                         buffer_size = usb_endpoint_maxp(endpoint);
2844                         if (!interrupt_in_found &&
2845                             (usb_endpoint_is_int_in(endpoint))) {
2846                                 /* we found a interrupt in endpoint */
2847                                 dev_dbg(ddev, "found interrupt in\n");
2848
2849                                 /* not set up yet, so do it now */
2850                                 edge_serial->interrupt_read_urb =
2851                                                 usb_alloc_urb(0, GFP_KERNEL);
2852                                 if (!edge_serial->interrupt_read_urb)
2853                                         return -ENOMEM;
2854
2855                                 edge_serial->interrupt_in_buffer =
2856                                         kmalloc(buffer_size, GFP_KERNEL);
2857                                 if (!edge_serial->interrupt_in_buffer) {
2858                                         usb_free_urb(edge_serial->interrupt_read_urb);
2859                                         return -ENOMEM;
2860                                 }
2861                                 edge_serial->interrupt_in_endpoint =
2862                                                 endpoint->bEndpointAddress;
2863
2864                                 /* set up our interrupt urb */
2865                                 usb_fill_int_urb(
2866                                         edge_serial->interrupt_read_urb,
2867                                         dev,
2868                                         usb_rcvintpipe(dev,
2869                                                 endpoint->bEndpointAddress),
2870                                         edge_serial->interrupt_in_buffer,
2871                                         buffer_size,
2872                                         edge_interrupt_callback,
2873                                         edge_serial,
2874                                         endpoint->bInterval);
2875
2876                                 interrupt_in_found = true;
2877                         }
2878
2879                         if (!bulk_in_found &&
2880                                 (usb_endpoint_is_bulk_in(endpoint))) {
2881                                 /* we found a bulk in endpoint */
2882                                 dev_dbg(ddev, "found bulk in\n");
2883
2884                                 /* not set up yet, so do it now */
2885                                 edge_serial->read_urb =
2886                                                 usb_alloc_urb(0, GFP_KERNEL);
2887                                 if (!edge_serial->read_urb)
2888                                         return -ENOMEM;
2889
2890                                 edge_serial->bulk_in_buffer =
2891                                         kmalloc(buffer_size, GFP_KERNEL);
2892                                 if (!edge_serial->bulk_in_buffer) {
2893                                         usb_free_urb(edge_serial->read_urb);
2894                                         return -ENOMEM;
2895                                 }
2896                                 edge_serial->bulk_in_endpoint =
2897                                                 endpoint->bEndpointAddress;
2898
2899                                 /* set up our bulk in urb */
2900                                 usb_fill_bulk_urb(edge_serial->read_urb, dev,
2901                                         usb_rcvbulkpipe(dev,
2902                                                 endpoint->bEndpointAddress),
2903                                         edge_serial->bulk_in_buffer,
2904                                         usb_endpoint_maxp(endpoint),
2905                                         edge_bulk_in_callback,
2906                                         edge_serial);
2907                                 bulk_in_found = true;
2908                         }
2909
2910                         if (!bulk_out_found &&
2911                             (usb_endpoint_is_bulk_out(endpoint))) {
2912                                 /* we found a bulk out endpoint */
2913                                 dev_dbg(ddev, "found bulk out\n");
2914                                 edge_serial->bulk_out_endpoint =
2915                                                 endpoint->bEndpointAddress;
2916                                 bulk_out_found = true;
2917                         }
2918                 }
2919
2920                 if (!interrupt_in_found || !bulk_in_found || !bulk_out_found) {
2921                         dev_err(ddev, "Error - the proper endpoints were not found!\n");
2922                         return -ENODEV;
2923                 }
2924
2925                 /* start interrupt read for this edgeport this interrupt will
2926                  * continue as long as the edgeport is connected */
2927                 response = usb_submit_urb(edge_serial->interrupt_read_urb,
2928                                                                 GFP_KERNEL);
2929                 if (response)
2930                         dev_err(ddev, "%s - Error %d submitting control urb\n",
2931                                 __func__, response);
2932         }
2933         return response;
2934 }
2935
2936
2937 /****************************************************************************
2938  * edge_disconnect
2939  *      This function is called whenever the device is removed from the usb bus.
2940  ****************************************************************************/
2941 static void edge_disconnect(struct usb_serial *serial)
2942 {
2943         struct edgeport_serial *edge_serial = usb_get_serial_data(serial);
2944
2945         /* stop reads and writes on all ports */
2946         /* free up our endpoint stuff */
2947         if (edge_serial->is_epic) {
2948                 usb_kill_urb(edge_serial->interrupt_read_urb);
2949                 usb_free_urb(edge_serial->interrupt_read_urb);
2950                 kfree(edge_serial->interrupt_in_buffer);
2951
2952                 usb_kill_urb(edge_serial->read_urb);
2953                 usb_free_urb(edge_serial->read_urb);
2954                 kfree(edge_serial->bulk_in_buffer);
2955         }
2956 }
2957
2958
2959 /****************************************************************************
2960  * edge_release
2961  *      This function is called when the device structure is deallocated.
2962  ****************************************************************************/
2963 static void edge_release(struct usb_serial *serial)
2964 {
2965         struct edgeport_serial *edge_serial = usb_get_serial_data(serial);
2966
2967         kfree(edge_serial);
2968 }
2969
2970 static int edge_port_probe(struct usb_serial_port *port)
2971 {
2972         struct edgeport_port *edge_port;
2973
2974         edge_port = kzalloc(sizeof(*edge_port), GFP_KERNEL);
2975         if (!edge_port)
2976                 return -ENOMEM;
2977
2978         spin_lock_init(&edge_port->ep_lock);
2979         edge_port->port = port;
2980
2981         usb_set_serial_port_data(port, edge_port);
2982
2983         return 0;
2984 }
2985
2986 static int edge_port_remove(struct usb_serial_port *port)
2987 {
2988         struct edgeport_port *edge_port;
2989
2990         edge_port = usb_get_serial_port_data(port);
2991         kfree(edge_port);
2992
2993         return 0;
2994 }
2995
2996 module_usb_serial_driver(serial_drivers, id_table_combined);
2997
2998 MODULE_AUTHOR(DRIVER_AUTHOR);
2999 MODULE_DESCRIPTION(DRIVER_DESC);
3000 MODULE_LICENSE("GPL");
3001 MODULE_FIRMWARE("edgeport/boot.fw");
3002 MODULE_FIRMWARE("edgeport/boot2.fw");
3003 MODULE_FIRMWARE("edgeport/down.fw");
3004 MODULE_FIRMWARE("edgeport/down2.fw");