kernel/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->is_epic) &&
1051              (edge_serial->epic_descriptor.Supports.IOSPChase))) {
1052                 /* flush and chase */
1053                 edge_port->chaseResponsePending = true;
1054
1055                 dev_dbg(&port->dev, "%s - Sending IOSP_CMD_CHASE_PORT\n", __func__);
1056                 status = send_iosp_ext_cmd(edge_port, IOSP_CMD_CHASE_PORT, 0);
1057                 if (status == 0)
1058                         /* block until chase finished */
1059                         block_until_chase_response(edge_port);
1060                 else
1061                         edge_port->chaseResponsePending = false;
1062         }
1063
1064         if ((!edge_serial->is_epic) ||
1065             ((edge_serial->is_epic) &&
1066              (edge_serial->epic_descriptor.Supports.IOSPClose))) {
1067                /* close the port */
1068                 dev_dbg(&port->dev, "%s - Sending IOSP_CMD_CLOSE_PORT\n", __func__);
1069                 send_iosp_ext_cmd(edge_port, IOSP_CMD_CLOSE_PORT, 0);
1070         }
1071
1072         /* port->close = true; */
1073         edge_port->closePending = false;
1074         edge_port->open = false;
1075         edge_port->openPending = false;
1076
1077         usb_kill_urb(edge_port->write_urb);
1078
1079         if (edge_port->write_urb) {
1080                 /* if this urb had a transfer buffer already
1081                                 (old transfer) free it */
1082                 kfree(edge_port->write_urb->transfer_buffer);
1083                 usb_free_urb(edge_port->write_urb);
1084                 edge_port->write_urb = NULL;
1085         }
1086         kfree(edge_port->txfifo.fifo);
1087         edge_port->txfifo.fifo = NULL;
1088 }
1089
1090 /*****************************************************************************
1091  * SerialWrite
1092  *      this function is called by the tty driver when data should be written
1093  *      to the port.
1094  *      If successful, we return the number of bytes written, otherwise we
1095  *      return a negative error number.
1096  *****************************************************************************/
1097 static int edge_write(struct tty_struct *tty, struct usb_serial_port *port,
1098                                         const unsigned char *data, int count)
1099 {
1100         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1101         struct TxFifo *fifo;
1102         int copySize;
1103         int bytesleft;
1104         int firsthalf;
1105         int secondhalf;
1106         unsigned long flags;
1107
1108         if (edge_port == NULL)
1109                 return -ENODEV;
1110
1111         /* get a pointer to the Tx fifo */
1112         fifo = &edge_port->txfifo;
1113
1114         spin_lock_irqsave(&edge_port->ep_lock, flags);
1115
1116         /* calculate number of bytes to put in fifo */
1117         copySize = min((unsigned int)count,
1118                                 (edge_port->txCredits - fifo->count));
1119
1120         dev_dbg(&port->dev, "%s of %d byte(s) Fifo room  %d -- will copy %d bytes\n",
1121                 __func__, count, edge_port->txCredits - fifo->count, copySize);
1122
1123         /* catch writes of 0 bytes which the tty driver likes to give us,
1124            and when txCredits is empty */
1125         if (copySize == 0) {
1126                 dev_dbg(&port->dev, "%s - copySize = Zero\n", __func__);
1127                 goto finish_write;
1128         }
1129
1130         /* queue the data
1131          * since we can never overflow the buffer we do not have to check for a
1132          * full condition
1133          *
1134          * the copy is done is two parts -- first fill to the end of the buffer
1135          * then copy the reset from the start of the buffer
1136          */
1137         bytesleft = fifo->size - fifo->head;
1138         firsthalf = min(bytesleft, copySize);
1139         dev_dbg(&port->dev, "%s - copy %d bytes of %d into fifo \n", __func__,
1140                 firsthalf, bytesleft);
1141
1142         /* now copy our data */
1143         memcpy(&fifo->fifo[fifo->head], data, firsthalf);
1144         usb_serial_debug_data(&port->dev, __func__, firsthalf, &fifo->fifo[fifo->head]);
1145
1146         /* update the index and size */
1147         fifo->head  += firsthalf;
1148         fifo->count += firsthalf;
1149
1150         /* wrap the index */
1151         if (fifo->head == fifo->size)
1152                 fifo->head = 0;
1153
1154         secondhalf = copySize-firsthalf;
1155
1156         if (secondhalf) {
1157                 dev_dbg(&port->dev, "%s - copy rest of data %d\n", __func__, secondhalf);
1158                 memcpy(&fifo->fifo[fifo->head], &data[firsthalf], secondhalf);
1159                 usb_serial_debug_data(&port->dev, __func__, secondhalf, &fifo->fifo[fifo->head]);
1160                 /* update the index and size */
1161                 fifo->count += secondhalf;
1162                 fifo->head  += secondhalf;
1163                 /* No need to check for wrap since we can not get to end of
1164                  * the fifo in this part
1165                  */
1166         }
1167
1168 finish_write:
1169         spin_unlock_irqrestore(&edge_port->ep_lock, flags);
1170
1171         send_more_port_data((struct edgeport_serial *)
1172                         usb_get_serial_data(port->serial), edge_port);
1173
1174         dev_dbg(&port->dev, "%s wrote %d byte(s) TxCredits %d, Fifo %d\n",
1175                 __func__, copySize, edge_port->txCredits, fifo->count);
1176
1177         return copySize;
1178 }
1179
1180
1181 /************************************************************************
1182  *
1183  * send_more_port_data()
1184  *
1185  *      This routine attempts to write additional UART transmit data
1186  *      to a port over the USB bulk pipe. It is called (1) when new
1187  *      data has been written to a port's TxBuffer from higher layers
1188  *      (2) when the peripheral sends us additional TxCredits indicating
1189  *      that it can accept more Tx data for a given port; and (3) when
1190  *      a bulk write completes successfully and we want to see if we
1191  *      can transmit more.
1192  *
1193  ************************************************************************/
1194 static void send_more_port_data(struct edgeport_serial *edge_serial,
1195                                         struct edgeport_port *edge_port)
1196 {
1197         struct TxFifo   *fifo = &edge_port->txfifo;
1198         struct device   *dev = &edge_port->port->dev;
1199         struct urb      *urb;
1200         unsigned char   *buffer;
1201         int             status;
1202         int             count;
1203         int             bytesleft;
1204         int             firsthalf;
1205         int             secondhalf;
1206         unsigned long   flags;
1207
1208         spin_lock_irqsave(&edge_port->ep_lock, flags);
1209
1210         if (edge_port->write_in_progress ||
1211             !edge_port->open             ||
1212             (fifo->count == 0)) {
1213                 dev_dbg(dev, "%s EXIT - fifo %d, PendingWrite = %d\n",
1214                         __func__, fifo->count, edge_port->write_in_progress);
1215                 goto exit_send;
1216         }
1217
1218         /* since the amount of data in the fifo will always fit into the
1219          * edgeport buffer we do not need to check the write length
1220          *
1221          * Do we have enough credits for this port to make it worthwhile
1222          * to bother queueing a write. If it's too small, say a few bytes,
1223          * it's better to wait for more credits so we can do a larger write.
1224          */
1225         if (edge_port->txCredits < EDGE_FW_GET_TX_CREDITS_SEND_THRESHOLD(edge_port->maxTxCredits, EDGE_FW_BULK_MAX_PACKET_SIZE)) {
1226                 dev_dbg(dev, "%s Not enough credit - fifo %d TxCredit %d\n",
1227                         __func__, fifo->count, edge_port->txCredits);
1228                 goto exit_send;
1229         }
1230
1231         /* lock this write */
1232         edge_port->write_in_progress = true;
1233
1234         /* get a pointer to the write_urb */
1235         urb = edge_port->write_urb;
1236
1237         /* make sure transfer buffer is freed */
1238         kfree(urb->transfer_buffer);
1239         urb->transfer_buffer = NULL;
1240
1241         /* build the data header for the buffer and port that we are about
1242            to send out */
1243         count = fifo->count;
1244         buffer = kmalloc(count+2, GFP_ATOMIC);
1245         if (!buffer) {
1246                 edge_port->write_in_progress = false;
1247                 goto exit_send;
1248         }
1249         buffer[0] = IOSP_BUILD_DATA_HDR1(edge_port->port->port_number, count);
1250         buffer[1] = IOSP_BUILD_DATA_HDR2(edge_port->port->port_number, count);
1251
1252         /* now copy our data */
1253         bytesleft =  fifo->size - fifo->tail;
1254         firsthalf = min(bytesleft, count);
1255         memcpy(&buffer[2], &fifo->fifo[fifo->tail], firsthalf);
1256         fifo->tail  += firsthalf;
1257         fifo->count -= firsthalf;
1258         if (fifo->tail == fifo->size)
1259                 fifo->tail = 0;
1260
1261         secondhalf = count-firsthalf;
1262         if (secondhalf) {
1263                 memcpy(&buffer[2+firsthalf], &fifo->fifo[fifo->tail],
1264                                                                 secondhalf);
1265                 fifo->tail  += secondhalf;
1266                 fifo->count -= secondhalf;
1267         }
1268
1269         if (count)
1270                 usb_serial_debug_data(&edge_port->port->dev, __func__, count, &buffer[2]);
1271
1272         /* fill up the urb with all of our data and submit it */
1273         usb_fill_bulk_urb(urb, edge_serial->serial->dev,
1274                         usb_sndbulkpipe(edge_serial->serial->dev,
1275                                         edge_serial->bulk_out_endpoint),
1276                         buffer, count+2,
1277                         edge_bulk_out_data_callback, edge_port);
1278
1279         /* decrement the number of credits we have by the number we just sent */
1280         edge_port->txCredits -= count;
1281         edge_port->port->icount.tx += count;
1282
1283         status = usb_submit_urb(urb, GFP_ATOMIC);
1284         if (status) {
1285                 /* something went wrong */
1286                 dev_err_console(edge_port->port,
1287                         "%s - usb_submit_urb(write bulk) failed, status = %d, data lost\n",
1288                                 __func__, status);
1289                 edge_port->write_in_progress = false;
1290
1291                 /* revert the credits as something bad happened. */
1292                 edge_port->txCredits += count;
1293                 edge_port->port->icount.tx -= count;
1294         }
1295         dev_dbg(dev, "%s wrote %d byte(s) TxCredit %d, Fifo %d\n",
1296                 __func__, count, edge_port->txCredits, fifo->count);
1297
1298 exit_send:
1299         spin_unlock_irqrestore(&edge_port->ep_lock, flags);
1300 }
1301
1302
1303 /*****************************************************************************
1304  * edge_write_room
1305  *      this function is called by the tty driver when it wants to know how
1306  *      many bytes of data we can accept for a specific port. If successful,
1307  *      we return the amount of room that we have for this port (the txCredits)
1308  *      otherwise we return a negative error number.
1309  *****************************************************************************/
1310 static int edge_write_room(struct tty_struct *tty)
1311 {
1312         struct usb_serial_port *port = tty->driver_data;
1313         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1314         int room;
1315         unsigned long flags;
1316
1317         if (edge_port == NULL)
1318                 return 0;
1319         if (edge_port->closePending)
1320                 return 0;
1321
1322         if (!edge_port->open) {
1323                 dev_dbg(&port->dev, "%s - port not opened\n", __func__);
1324                 return 0;
1325         }
1326
1327         /* total of both buffers is still txCredit */
1328         spin_lock_irqsave(&edge_port->ep_lock, flags);
1329         room = edge_port->txCredits - edge_port->txfifo.count;
1330         spin_unlock_irqrestore(&edge_port->ep_lock, flags);
1331
1332         dev_dbg(&port->dev, "%s - returns %d\n", __func__, room);
1333         return room;
1334 }
1335
1336
1337 /*****************************************************************************
1338  * edge_chars_in_buffer
1339  *      this function is called by the tty driver when it wants to know how
1340  *      many bytes of data we currently have outstanding in the port (data that
1341  *      has been written, but hasn't made it out the port yet)
1342  *      If successful, we return the number of bytes left to be written in the
1343  *      system,
1344  *      Otherwise we return a negative error number.
1345  *****************************************************************************/
1346 static int edge_chars_in_buffer(struct tty_struct *tty)
1347 {
1348         struct usb_serial_port *port = tty->driver_data;
1349         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1350         int num_chars;
1351         unsigned long flags;
1352
1353         if (edge_port == NULL)
1354                 return 0;
1355         if (edge_port->closePending)
1356                 return 0;
1357
1358         if (!edge_port->open) {
1359                 dev_dbg(&port->dev, "%s - port not opened\n", __func__);
1360                 return 0;
1361         }
1362
1363         spin_lock_irqsave(&edge_port->ep_lock, flags);
1364         num_chars = edge_port->maxTxCredits - edge_port->txCredits +
1365                                                 edge_port->txfifo.count;
1366         spin_unlock_irqrestore(&edge_port->ep_lock, flags);
1367         if (num_chars) {
1368                 dev_dbg(&port->dev, "%s - returns %d\n", __func__, num_chars);
1369         }
1370
1371         return num_chars;
1372 }
1373
1374
1375 /*****************************************************************************
1376  * SerialThrottle
1377  *      this function is called by the tty driver when it wants to stop the data
1378  *      being read from the port.
1379  *****************************************************************************/
1380 static void edge_throttle(struct tty_struct *tty)
1381 {
1382         struct usb_serial_port *port = tty->driver_data;
1383         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1384         int status;
1385
1386         if (edge_port == NULL)
1387                 return;
1388
1389         if (!edge_port->open) {
1390                 dev_dbg(&port->dev, "%s - port not opened\n", __func__);
1391                 return;
1392         }
1393
1394         /* if we are implementing XON/XOFF, send the stop character */
1395         if (I_IXOFF(tty)) {
1396                 unsigned char stop_char = STOP_CHAR(tty);
1397                 status = edge_write(tty, port, &stop_char, 1);
1398                 if (status <= 0)
1399                         return;
1400         }
1401
1402         /* if we are implementing RTS/CTS, toggle that line */
1403         if (tty->termios.c_cflag & CRTSCTS) {
1404                 edge_port->shadowMCR &= ~MCR_RTS;
1405                 status = send_cmd_write_uart_register(edge_port, MCR,
1406                                                         edge_port->shadowMCR);
1407                 if (status != 0)
1408                         return;
1409         }
1410 }
1411
1412
1413 /*****************************************************************************
1414  * edge_unthrottle
1415  *      this function is called by the tty driver when it wants to resume the
1416  *      data being read from the port (called after SerialThrottle is called)
1417  *****************************************************************************/
1418 static void edge_unthrottle(struct tty_struct *tty)
1419 {
1420         struct usb_serial_port *port = tty->driver_data;
1421         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1422         int status;
1423
1424         if (edge_port == NULL)
1425                 return;
1426
1427         if (!edge_port->open) {
1428                 dev_dbg(&port->dev, "%s - port not opened\n", __func__);
1429                 return;
1430         }
1431
1432         /* if we are implementing XON/XOFF, send the start character */
1433         if (I_IXOFF(tty)) {
1434                 unsigned char start_char = START_CHAR(tty);
1435                 status = edge_write(tty, port, &start_char, 1);
1436                 if (status <= 0)
1437                         return;
1438         }
1439         /* if we are implementing RTS/CTS, toggle that line */
1440         if (tty->termios.c_cflag & CRTSCTS) {
1441                 edge_port->shadowMCR |= MCR_RTS;
1442                 send_cmd_write_uart_register(edge_port, MCR,
1443                                                 edge_port->shadowMCR);
1444         }
1445 }
1446
1447
1448 /*****************************************************************************
1449  * SerialSetTermios
1450  *      this function is called by the tty driver when it wants to change
1451  * the termios structure
1452  *****************************************************************************/
1453 static void edge_set_termios(struct tty_struct *tty,
1454         struct usb_serial_port *port, struct ktermios *old_termios)
1455 {
1456         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1457         unsigned int cflag;
1458
1459         cflag = tty->termios.c_cflag;
1460         dev_dbg(&port->dev, "%s - clfag %08x iflag %08x\n", __func__, tty->termios.c_cflag, tty->termios.c_iflag);
1461         dev_dbg(&port->dev, "%s - old clfag %08x old iflag %08x\n", __func__, old_termios->c_cflag, old_termios->c_iflag);
1462
1463         if (edge_port == NULL)
1464                 return;
1465
1466         if (!edge_port->open) {
1467                 dev_dbg(&port->dev, "%s - port not opened\n", __func__);
1468                 return;
1469         }
1470
1471         /* change the port settings to the new ones specified */
1472         change_port_settings(tty, edge_port, old_termios);
1473 }
1474
1475
1476 /*****************************************************************************
1477  * get_lsr_info - get line status register info
1478  *
1479  * Purpose: Let user call ioctl() to get info when the UART physically
1480  *          is emptied.  On bus types like RS485, the transmitter must
1481  *          release the bus after transmitting. This must be done when
1482  *          the transmit shift register is empty, not be done when the
1483  *          transmit holding register is empty.  This functionality
1484  *          allows an RS485 driver to be written in user space.
1485  *****************************************************************************/
1486 static int get_lsr_info(struct edgeport_port *edge_port,
1487                                                 unsigned int __user *value)
1488 {
1489         unsigned int result = 0;
1490         unsigned long flags;
1491
1492         spin_lock_irqsave(&edge_port->ep_lock, flags);
1493         if (edge_port->maxTxCredits == edge_port->txCredits &&
1494             edge_port->txfifo.count == 0) {
1495                 dev_dbg(&edge_port->port->dev, "%s -- Empty\n", __func__);
1496                 result = TIOCSER_TEMT;
1497         }
1498         spin_unlock_irqrestore(&edge_port->ep_lock, flags);
1499
1500         if (copy_to_user(value, &result, sizeof(int)))
1501                 return -EFAULT;
1502         return 0;
1503 }
1504
1505 static int edge_tiocmset(struct tty_struct *tty,
1506                                         unsigned int set, unsigned int clear)
1507 {
1508         struct usb_serial_port *port = tty->driver_data;
1509         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1510         unsigned int mcr;
1511
1512         mcr = edge_port->shadowMCR;
1513         if (set & TIOCM_RTS)
1514                 mcr |= MCR_RTS;
1515         if (set & TIOCM_DTR)
1516                 mcr |= MCR_DTR;
1517         if (set & TIOCM_LOOP)
1518                 mcr |= MCR_LOOPBACK;
1519
1520         if (clear & TIOCM_RTS)
1521                 mcr &= ~MCR_RTS;
1522         if (clear & TIOCM_DTR)
1523                 mcr &= ~MCR_DTR;
1524         if (clear & TIOCM_LOOP)
1525                 mcr &= ~MCR_LOOPBACK;
1526
1527         edge_port->shadowMCR = mcr;
1528
1529         send_cmd_write_uart_register(edge_port, MCR, edge_port->shadowMCR);
1530
1531         return 0;
1532 }
1533
1534 static int edge_tiocmget(struct tty_struct *tty)
1535 {
1536         struct usb_serial_port *port = tty->driver_data;
1537         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1538         unsigned int result = 0;
1539         unsigned int msr;
1540         unsigned int mcr;
1541
1542         msr = edge_port->shadowMSR;
1543         mcr = edge_port->shadowMCR;
1544         result = ((mcr & MCR_DTR)       ? TIOCM_DTR: 0)   /* 0x002 */
1545                   | ((mcr & MCR_RTS)    ? TIOCM_RTS: 0)   /* 0x004 */
1546                   | ((msr & EDGEPORT_MSR_CTS)   ? TIOCM_CTS: 0)   /* 0x020 */
1547                   | ((msr & EDGEPORT_MSR_CD)    ? TIOCM_CAR: 0)   /* 0x040 */
1548                   | ((msr & EDGEPORT_MSR_RI)    ? TIOCM_RI:  0)   /* 0x080 */
1549                   | ((msr & EDGEPORT_MSR_DSR)   ? TIOCM_DSR: 0);  /* 0x100 */
1550
1551         return result;
1552 }
1553
1554 static int get_serial_info(struct edgeport_port *edge_port,
1555                                 struct serial_struct __user *retinfo)
1556 {
1557         struct serial_struct tmp;
1558
1559         if (!retinfo)
1560                 return -EFAULT;
1561
1562         memset(&tmp, 0, sizeof(tmp));
1563
1564         tmp.type                = PORT_16550A;
1565         tmp.line                = edge_port->port->minor;
1566         tmp.port                = edge_port->port->port_number;
1567         tmp.irq                 = 0;
1568         tmp.flags               = ASYNC_SKIP_TEST | ASYNC_AUTO_IRQ;
1569         tmp.xmit_fifo_size      = edge_port->maxTxCredits;
1570         tmp.baud_base           = 9600;
1571         tmp.close_delay         = 5*HZ;
1572         tmp.closing_wait        = 30*HZ;
1573
1574         if (copy_to_user(retinfo, &tmp, sizeof(*retinfo)))
1575                 return -EFAULT;
1576         return 0;
1577 }
1578
1579
1580 /*****************************************************************************
1581  * SerialIoctl
1582  *      this function handles any ioctl calls to the driver
1583  *****************************************************************************/
1584 static int edge_ioctl(struct tty_struct *tty,
1585                                         unsigned int cmd, unsigned long arg)
1586 {
1587         struct usb_serial_port *port = tty->driver_data;
1588         DEFINE_WAIT(wait);
1589         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1590
1591         switch (cmd) {
1592         case TIOCSERGETLSR:
1593                 dev_dbg(&port->dev, "%s TIOCSERGETLSR\n", __func__);
1594                 return get_lsr_info(edge_port, (unsigned int __user *) arg);
1595
1596         case TIOCGSERIAL:
1597                 dev_dbg(&port->dev, "%s TIOCGSERIAL\n", __func__);
1598                 return get_serial_info(edge_port, (struct serial_struct __user *) arg);
1599         }
1600         return -ENOIOCTLCMD;
1601 }
1602
1603
1604 /*****************************************************************************
1605  * SerialBreak
1606  *      this function sends a break to the port
1607  *****************************************************************************/
1608 static void edge_break(struct tty_struct *tty, int break_state)
1609 {
1610         struct usb_serial_port *port = tty->driver_data;
1611         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1612         struct edgeport_serial *edge_serial = usb_get_serial_data(port->serial);
1613         int status;
1614
1615         if ((!edge_serial->is_epic) ||
1616             ((edge_serial->is_epic) &&
1617              (edge_serial->epic_descriptor.Supports.IOSPChase))) {
1618                 /* flush and chase */
1619                 edge_port->chaseResponsePending = true;
1620
1621                 dev_dbg(&port->dev, "%s - Sending IOSP_CMD_CHASE_PORT\n", __func__);
1622                 status = send_iosp_ext_cmd(edge_port, IOSP_CMD_CHASE_PORT, 0);
1623                 if (status == 0) {
1624                         /* block until chase finished */
1625                         block_until_chase_response(edge_port);
1626                 } else {
1627                         edge_port->chaseResponsePending = false;
1628                 }
1629         }
1630
1631         if ((!edge_serial->is_epic) ||
1632             ((edge_serial->is_epic) &&
1633              (edge_serial->epic_descriptor.Supports.IOSPSetClrBreak))) {
1634                 if (break_state == -1) {
1635                         dev_dbg(&port->dev, "%s - Sending IOSP_CMD_SET_BREAK\n", __func__);
1636                         status = send_iosp_ext_cmd(edge_port,
1637                                                 IOSP_CMD_SET_BREAK, 0);
1638                 } else {
1639                         dev_dbg(&port->dev, "%s - Sending IOSP_CMD_CLEAR_BREAK\n", __func__);
1640                         status = send_iosp_ext_cmd(edge_port,
1641                                                 IOSP_CMD_CLEAR_BREAK, 0);
1642                 }
1643                 if (status)
1644                         dev_dbg(&port->dev, "%s - error sending break set/clear command.\n",
1645                                 __func__);
1646         }
1647 }
1648
1649
1650 /*****************************************************************************
1651  * process_rcvd_data
1652  *      this function handles the data received on the bulk in pipe.
1653  *****************************************************************************/
1654 static void process_rcvd_data(struct edgeport_serial *edge_serial,
1655                                 unsigned char *buffer, __u16 bufferLength)
1656 {
1657         struct device *dev = &edge_serial->serial->dev->dev;
1658         struct usb_serial_port *port;
1659         struct edgeport_port *edge_port;
1660         __u16 lastBufferLength;
1661         __u16 rxLen;
1662
1663         lastBufferLength = bufferLength + 1;
1664
1665         while (bufferLength > 0) {
1666                 /* failsafe incase we get a message that we don't understand */
1667                 if (lastBufferLength == bufferLength) {
1668                         dev_dbg(dev, "%s - stuck in loop, exiting it.\n", __func__);
1669                         break;
1670                 }
1671                 lastBufferLength = bufferLength;
1672
1673                 switch (edge_serial->rxState) {
1674                 case EXPECT_HDR1:
1675                         edge_serial->rxHeader1 = *buffer;
1676                         ++buffer;
1677                         --bufferLength;
1678
1679                         if (bufferLength == 0) {
1680                                 edge_serial->rxState = EXPECT_HDR2;
1681                                 break;
1682                         }
1683                         /* otherwise, drop on through */
1684                 case EXPECT_HDR2:
1685                         edge_serial->rxHeader2 = *buffer;
1686                         ++buffer;
1687                         --bufferLength;
1688
1689                         dev_dbg(dev, "%s - Hdr1=%02X Hdr2=%02X\n", __func__,
1690                                 edge_serial->rxHeader1, edge_serial->rxHeader2);
1691                         /* Process depending on whether this header is
1692                          * data or status */
1693
1694                         if (IS_CMD_STAT_HDR(edge_serial->rxHeader1)) {
1695                                 /* Decode this status header and go to
1696                                  * EXPECT_HDR1 (if we can process the status
1697                                  * with only 2 bytes), or go to EXPECT_HDR3 to
1698                                  * get the third byte. */
1699                                 edge_serial->rxPort =
1700                                     IOSP_GET_HDR_PORT(edge_serial->rxHeader1);
1701                                 edge_serial->rxStatusCode =
1702                                     IOSP_GET_STATUS_CODE(
1703                                                 edge_serial->rxHeader1);
1704
1705                                 if (!IOSP_STATUS_IS_2BYTE(
1706                                                 edge_serial->rxStatusCode)) {
1707                                         /* This status needs additional bytes.
1708                                          * Save what we have and then wait for
1709                                          * more data.
1710                                          */
1711                                         edge_serial->rxStatusParam
1712                                                 = edge_serial->rxHeader2;
1713                                         edge_serial->rxState = EXPECT_HDR3;
1714                                         break;
1715                                 }
1716                                 /* We have all the header bytes, process the
1717                                    status now */
1718                                 process_rcvd_status(edge_serial,
1719                                                 edge_serial->rxHeader2, 0);
1720                                 edge_serial->rxState = EXPECT_HDR1;
1721                                 break;
1722                         } else {
1723                                 edge_serial->rxPort =
1724                                     IOSP_GET_HDR_PORT(edge_serial->rxHeader1);
1725                                 edge_serial->rxBytesRemaining =
1726                                     IOSP_GET_HDR_DATA_LEN(
1727                                                 edge_serial->rxHeader1,
1728                                                 edge_serial->rxHeader2);
1729                                 dev_dbg(dev, "%s - Data for Port %u Len %u\n",
1730                                         __func__,
1731                                         edge_serial->rxPort,
1732                                         edge_serial->rxBytesRemaining);
1733
1734                                 /* ASSERT(DevExt->RxPort < DevExt->NumPorts);
1735                                  * ASSERT(DevExt->RxBytesRemaining <
1736                                  *              IOSP_MAX_DATA_LENGTH);
1737                                  */
1738
1739                                 if (bufferLength == 0) {
1740                                         edge_serial->rxState = EXPECT_DATA;
1741                                         break;
1742                                 }
1743                                 /* Else, drop through */
1744                         }
1745                 case EXPECT_DATA: /* Expect data */
1746                         if (bufferLength < edge_serial->rxBytesRemaining) {
1747                                 rxLen = bufferLength;
1748                                 /* Expect data to start next buffer */
1749                                 edge_serial->rxState = EXPECT_DATA;
1750                         } else {
1751                                 /* BufLen >= RxBytesRemaining */
1752                                 rxLen = edge_serial->rxBytesRemaining;
1753                                 /* Start another header next time */
1754                                 edge_serial->rxState = EXPECT_HDR1;
1755                         }
1756
1757                         bufferLength -= rxLen;
1758                         edge_serial->rxBytesRemaining -= rxLen;
1759
1760                         /* spit this data back into the tty driver if this
1761                            port is open */
1762                         if (rxLen) {
1763                                 port = edge_serial->serial->port[
1764                                                         edge_serial->rxPort];
1765                                 edge_port = usb_get_serial_port_data(port);
1766                                 if (edge_port->open) {
1767                                         dev_dbg(dev, "%s - Sending %d bytes to TTY for port %d\n",
1768                                                 __func__, rxLen,
1769                                                 edge_serial->rxPort);
1770                                         edge_tty_recv(edge_port->port, buffer,
1771                                                         rxLen);
1772                                         edge_port->port->icount.rx += rxLen;
1773                                 }
1774                                 buffer += rxLen;
1775                         }
1776                         break;
1777
1778                 case EXPECT_HDR3:       /* Expect 3rd byte of status header */
1779                         edge_serial->rxHeader3 = *buffer;
1780                         ++buffer;
1781                         --bufferLength;
1782
1783                         /* We have all the header bytes, process the
1784                            status now */
1785                         process_rcvd_status(edge_serial,
1786                                 edge_serial->rxStatusParam,
1787                                 edge_serial->rxHeader3);
1788                         edge_serial->rxState = EXPECT_HDR1;
1789                         break;
1790                 }
1791         }
1792 }
1793
1794
1795 /*****************************************************************************
1796  * process_rcvd_status
1797  *      this function handles the any status messages received on the
1798  *      bulk in pipe.
1799  *****************************************************************************/
1800 static void process_rcvd_status(struct edgeport_serial *edge_serial,
1801                                                 __u8 byte2, __u8 byte3)
1802 {
1803         struct usb_serial_port *port;
1804         struct edgeport_port *edge_port;
1805         struct tty_struct *tty;
1806         struct device *dev;
1807         __u8 code = edge_serial->rxStatusCode;
1808
1809         /* switch the port pointer to the one being currently talked about */
1810         port = edge_serial->serial->port[edge_serial->rxPort];
1811         edge_port = usb_get_serial_port_data(port);
1812         if (edge_port == NULL) {
1813                 dev_err(&edge_serial->serial->dev->dev,
1814                         "%s - edge_port == NULL for port %d\n",
1815                                         __func__, edge_serial->rxPort);
1816                 return;
1817         }
1818         dev = &port->dev;
1819
1820         if (code == IOSP_EXT_STATUS) {
1821                 switch (byte2) {
1822                 case IOSP_EXT_STATUS_CHASE_RSP:
1823                         /* we want to do EXT status regardless of port
1824                          * open/closed */
1825                         dev_dbg(dev, "%s - Port %u EXT CHASE_RSP Data = %02x\n",
1826                                 __func__, edge_serial->rxPort, byte3);
1827                         /* Currently, the only EXT_STATUS is Chase, so process
1828                          * here instead of one more call to one more subroutine
1829                          * If/when more EXT_STATUS, there'll be more work to do
1830                          * Also, we currently clear flag and close the port
1831                          * regardless of content of above's Byte3.
1832                          * We could choose to do something else when Byte3 says
1833                          * Timeout on Chase from Edgeport, like wait longer in
1834                          * block_until_chase_response, but for now we don't.
1835                          */
1836                         edge_port->chaseResponsePending = false;
1837                         wake_up(&edge_port->wait_chase);
1838                         return;
1839
1840                 case IOSP_EXT_STATUS_RX_CHECK_RSP:
1841                         dev_dbg(dev, "%s ========== Port %u CHECK_RSP Sequence = %02x =============\n",
1842                                 __func__, edge_serial->rxPort, byte3);
1843                         /* Port->RxCheckRsp = true; */
1844                         return;
1845                 }
1846         }
1847
1848         if (code == IOSP_STATUS_OPEN_RSP) {
1849                 edge_port->txCredits = GET_TX_BUFFER_SIZE(byte3);
1850                 edge_port->maxTxCredits = edge_port->txCredits;
1851                 dev_dbg(dev, "%s - Port %u Open Response Initial MSR = %02x TxBufferSize = %d\n",
1852                         __func__, edge_serial->rxPort, byte2, edge_port->txCredits);
1853                 handle_new_msr(edge_port, byte2);
1854
1855                 /* send the current line settings to the port so we are
1856                    in sync with any further termios calls */
1857                 tty = tty_port_tty_get(&edge_port->port->port);
1858                 if (tty) {
1859                         change_port_settings(tty,
1860                                 edge_port, &tty->termios);
1861                         tty_kref_put(tty);
1862                 }
1863
1864                 /* we have completed the open */
1865                 edge_port->openPending = false;
1866                 edge_port->open = true;
1867                 wake_up(&edge_port->wait_open);
1868                 return;
1869         }
1870
1871         /* If port is closed, silently discard all rcvd status. We can
1872          * have cases where buffered status is received AFTER the close
1873          * port command is sent to the Edgeport.
1874          */
1875         if (!edge_port->open || edge_port->closePending)
1876                 return;
1877
1878         switch (code) {
1879         /* Not currently sent by Edgeport */
1880         case IOSP_STATUS_LSR:
1881                 dev_dbg(dev, "%s - Port %u LSR Status = %02x\n",
1882                         __func__, edge_serial->rxPort, byte2);
1883                 handle_new_lsr(edge_port, false, byte2, 0);
1884                 break;
1885
1886         case IOSP_STATUS_LSR_DATA:
1887                 dev_dbg(dev, "%s - Port %u LSR Status = %02x, Data = %02x\n",
1888                         __func__, edge_serial->rxPort, byte2, byte3);
1889                 /* byte2 is LSR Register */
1890                 /* byte3 is broken data byte */
1891                 handle_new_lsr(edge_port, true, byte2, byte3);
1892                 break;
1893         /*
1894          *      case IOSP_EXT_4_STATUS:
1895          *              dev_dbg(dev, "%s - Port %u LSR Status = %02x Data = %02x\n",
1896          *                      __func__, edge_serial->rxPort, byte2, byte3);
1897          *              break;
1898          */
1899         case IOSP_STATUS_MSR:
1900                 dev_dbg(dev, "%s - Port %u MSR Status = %02x\n",
1901                         __func__, edge_serial->rxPort, byte2);
1902                 /*
1903                  * Process this new modem status and generate appropriate
1904                  * events, etc, based on the new status. This routine
1905                  * also saves the MSR in Port->ShadowMsr.
1906                  */
1907                 handle_new_msr(edge_port, byte2);
1908                 break;
1909
1910         default:
1911                 dev_dbg(dev, "%s - Unrecognized IOSP status code %u\n", __func__, code);
1912                 break;
1913         }
1914 }
1915
1916
1917 /*****************************************************************************
1918  * edge_tty_recv
1919  *      this function passes data on to the tty flip buffer
1920  *****************************************************************************/
1921 static void edge_tty_recv(struct usb_serial_port *port, unsigned char *data,
1922                 int length)
1923 {
1924         int cnt;
1925
1926         cnt = tty_insert_flip_string(&port->port, data, length);
1927         if (cnt < length) {
1928                 dev_err(&port->dev, "%s - dropping data, %d bytes lost\n",
1929                                 __func__, length - cnt);
1930         }
1931         data += cnt;
1932         length -= cnt;
1933
1934         tty_flip_buffer_push(&port->port);
1935 }
1936
1937
1938 /*****************************************************************************
1939  * handle_new_msr
1940  *      this function handles any change to the msr register for a port.
1941  *****************************************************************************/
1942 static void handle_new_msr(struct edgeport_port *edge_port, __u8 newMsr)
1943 {
1944         struct  async_icount *icount;
1945
1946         if (newMsr & (EDGEPORT_MSR_DELTA_CTS | EDGEPORT_MSR_DELTA_DSR |
1947                         EDGEPORT_MSR_DELTA_RI | EDGEPORT_MSR_DELTA_CD)) {
1948                 icount = &edge_port->port->icount;
1949
1950                 /* update input line counters */
1951                 if (newMsr & EDGEPORT_MSR_DELTA_CTS)
1952                         icount->cts++;
1953                 if (newMsr & EDGEPORT_MSR_DELTA_DSR)
1954                         icount->dsr++;
1955                 if (newMsr & EDGEPORT_MSR_DELTA_CD)
1956                         icount->dcd++;
1957                 if (newMsr & EDGEPORT_MSR_DELTA_RI)
1958                         icount->rng++;
1959                 wake_up_interruptible(&edge_port->port->port.delta_msr_wait);
1960         }
1961
1962         /* Save the new modem status */
1963         edge_port->shadowMSR = newMsr & 0xf0;
1964 }
1965
1966
1967 /*****************************************************************************
1968  * handle_new_lsr
1969  *      this function handles any change to the lsr register for a port.
1970  *****************************************************************************/
1971 static void handle_new_lsr(struct edgeport_port *edge_port, __u8 lsrData,
1972                                                         __u8 lsr, __u8 data)
1973 {
1974         __u8 newLsr = (__u8) (lsr & (__u8)
1975                 (LSR_OVER_ERR | LSR_PAR_ERR | LSR_FRM_ERR | LSR_BREAK));
1976         struct async_icount *icount;
1977
1978         edge_port->shadowLSR = lsr;
1979
1980         if (newLsr & LSR_BREAK) {
1981                 /*
1982                  * Parity and Framing errors only count if they
1983                  * occur exclusive of a break being
1984                  * received.
1985                  */
1986                 newLsr &= (__u8)(LSR_OVER_ERR | LSR_BREAK);
1987         }
1988
1989         /* Place LSR data byte into Rx buffer */
1990         if (lsrData)
1991                 edge_tty_recv(edge_port->port, &data, 1);
1992
1993         /* update input line counters */
1994         icount = &edge_port->port->icount;
1995         if (newLsr & LSR_BREAK)
1996                 icount->brk++;
1997         if (newLsr & LSR_OVER_ERR)
1998                 icount->overrun++;
1999         if (newLsr & LSR_PAR_ERR)
2000                 icount->parity++;
2001         if (newLsr & LSR_FRM_ERR)
2002                 icount->frame++;
2003 }
2004
2005
2006 /****************************************************************************
2007  * sram_write
2008  *      writes a number of bytes to the Edgeport device's sram starting at the
2009  *      given address.
2010  *      If successful returns the number of bytes written, otherwise it returns
2011  *      a negative error number of the problem.
2012  ****************************************************************************/
2013 static int sram_write(struct usb_serial *serial, __u16 extAddr, __u16 addr,
2014                                         __u16 length, const __u8 *data)
2015 {
2016         int result;
2017         __u16 current_length;
2018         unsigned char *transfer_buffer;
2019
2020         dev_dbg(&serial->dev->dev, "%s - %x, %x, %d\n", __func__, extAddr, addr, length);
2021
2022         transfer_buffer =  kmalloc(64, GFP_KERNEL);
2023         if (!transfer_buffer)
2024                 return -ENOMEM;
2025
2026         /* need to split these writes up into 64 byte chunks */
2027         result = 0;
2028         while (length > 0) {
2029                 if (length > 64)
2030                         current_length = 64;
2031                 else
2032                         current_length = length;
2033
2034 /*              dev_dbg(&serial->dev->dev, "%s - writing %x, %x, %d\n", __func__, extAddr, addr, current_length); */
2035                 memcpy(transfer_buffer, data, current_length);
2036                 result = usb_control_msg(serial->dev,
2037                                         usb_sndctrlpipe(serial->dev, 0),
2038                                         USB_REQUEST_ION_WRITE_RAM,
2039                                         0x40, addr, extAddr, transfer_buffer,
2040                                         current_length, 300);
2041                 if (result < 0)
2042                         break;
2043                 length -= current_length;
2044                 addr += current_length;
2045                 data += current_length;
2046         }
2047
2048         kfree(transfer_buffer);
2049         return result;
2050 }
2051
2052
2053 /****************************************************************************
2054  * rom_write
2055  *      writes a number of bytes to the Edgeport device's ROM starting at the
2056  *      given address.
2057  *      If successful returns the number of bytes written, otherwise it returns
2058  *      a negative error number of the problem.
2059  ****************************************************************************/
2060 static int rom_write(struct usb_serial *serial, __u16 extAddr, __u16 addr,
2061                                         __u16 length, const __u8 *data)
2062 {
2063         int result;
2064         __u16 current_length;
2065         unsigned char *transfer_buffer;
2066
2067         transfer_buffer =  kmalloc(64, GFP_KERNEL);
2068         if (!transfer_buffer)
2069                 return -ENOMEM;
2070
2071         /* need to split these writes up into 64 byte chunks */
2072         result = 0;
2073         while (length > 0) {
2074                 if (length > 64)
2075                         current_length = 64;
2076                 else
2077                         current_length = length;
2078                 memcpy(transfer_buffer, data, current_length);
2079                 result = usb_control_msg(serial->dev,
2080                                         usb_sndctrlpipe(serial->dev, 0),
2081                                         USB_REQUEST_ION_WRITE_ROM, 0x40,
2082                                         addr, extAddr,
2083                                         transfer_buffer, current_length, 300);
2084                 if (result < 0)
2085                         break;
2086                 length -= current_length;
2087                 addr += current_length;
2088                 data += current_length;
2089         }
2090
2091         kfree(transfer_buffer);
2092         return result;
2093 }
2094
2095
2096 /****************************************************************************
2097  * rom_read
2098  *      reads a number of bytes from the Edgeport device starting at the given
2099  *      address.
2100  *      If successful returns the number of bytes read, otherwise it returns
2101  *      a negative error number of the problem.
2102  ****************************************************************************/
2103 static int rom_read(struct usb_serial *serial, __u16 extAddr,
2104                                         __u16 addr, __u16 length, __u8 *data)
2105 {
2106         int result;
2107         __u16 current_length;
2108         unsigned char *transfer_buffer;
2109
2110         transfer_buffer =  kmalloc(64, GFP_KERNEL);
2111         if (!transfer_buffer)
2112                 return -ENOMEM;
2113
2114         /* need to split these reads up into 64 byte chunks */
2115         result = 0;
2116         while (length > 0) {
2117                 if (length > 64)
2118                         current_length = 64;
2119                 else
2120                         current_length = length;
2121                 result = usb_control_msg(serial->dev,
2122                                         usb_rcvctrlpipe(serial->dev, 0),
2123                                         USB_REQUEST_ION_READ_ROM,
2124                                         0xC0, addr, extAddr, transfer_buffer,
2125                                         current_length, 300);
2126                 if (result < 0)
2127                         break;
2128                 memcpy(data, transfer_buffer, current_length);
2129                 length -= current_length;
2130                 addr += current_length;
2131                 data += current_length;
2132         }
2133
2134         kfree(transfer_buffer);
2135         return result;
2136 }
2137
2138
2139 /****************************************************************************
2140  * send_iosp_ext_cmd
2141  *      Is used to send a IOSP message to the Edgeport device
2142  ****************************************************************************/
2143 static int send_iosp_ext_cmd(struct edgeport_port *edge_port,
2144                                                 __u8 command, __u8 param)
2145 {
2146         unsigned char   *buffer;
2147         unsigned char   *currentCommand;
2148         int             length = 0;
2149         int             status = 0;
2150
2151         buffer = kmalloc(10, GFP_ATOMIC);
2152         if (!buffer)
2153                 return -ENOMEM;
2154
2155         currentCommand = buffer;
2156
2157         MAKE_CMD_EXT_CMD(&currentCommand, &length, edge_port->port->port_number,
2158                          command, param);
2159
2160         status = write_cmd_usb(edge_port, buffer, length);
2161         if (status) {
2162                 /* something bad happened, let's free up the memory */
2163                 kfree(buffer);
2164         }
2165
2166         return status;
2167 }
2168
2169
2170 /*****************************************************************************
2171  * write_cmd_usb
2172  *      this function writes the given buffer out to the bulk write endpoint.
2173  *****************************************************************************/
2174 static int write_cmd_usb(struct edgeport_port *edge_port,
2175                                         unsigned char *buffer, int length)
2176 {
2177         struct edgeport_serial *edge_serial =
2178                                 usb_get_serial_data(edge_port->port->serial);
2179         struct device *dev = &edge_port->port->dev;
2180         int status = 0;
2181         struct urb *urb;
2182
2183         usb_serial_debug_data(dev, __func__, length, buffer);
2184
2185         /* Allocate our next urb */
2186         urb = usb_alloc_urb(0, GFP_ATOMIC);
2187         if (!urb)
2188                 return -ENOMEM;
2189
2190         atomic_inc(&CmdUrbs);
2191         dev_dbg(dev, "%s - ALLOCATE URB %p (outstanding %d)\n",
2192                 __func__, urb, atomic_read(&CmdUrbs));
2193
2194         usb_fill_bulk_urb(urb, edge_serial->serial->dev,
2195                         usb_sndbulkpipe(edge_serial->serial->dev,
2196                                         edge_serial->bulk_out_endpoint),
2197                         buffer, length, edge_bulk_out_cmd_callback, edge_port);
2198
2199         edge_port->commandPending = true;
2200         status = usb_submit_urb(urb, GFP_ATOMIC);
2201
2202         if (status) {
2203                 /* something went wrong */
2204                 dev_err(dev, "%s - usb_submit_urb(write command) failed, status = %d\n",
2205                         __func__, status);
2206                 usb_kill_urb(urb);
2207                 usb_free_urb(urb);
2208                 atomic_dec(&CmdUrbs);
2209                 return status;
2210         }
2211
2212 #if 0
2213         wait_event(&edge_port->wait_command, !edge_port->commandPending);
2214
2215         if (edge_port->commandPending) {
2216                 /* command timed out */
2217                 dev_dbg(dev, "%s - command timed out\n", __func__);
2218                 status = -EINVAL;
2219         }
2220 #endif
2221         return status;
2222 }
2223
2224
2225 /*****************************************************************************
2226  * send_cmd_write_baud_rate
2227  *      this function sends the proper command to change the baud rate of the
2228  *      specified port.
2229  *****************************************************************************/
2230 static int send_cmd_write_baud_rate(struct edgeport_port *edge_port,
2231                                                                 int baudRate)
2232 {
2233         struct edgeport_serial *edge_serial =
2234                                 usb_get_serial_data(edge_port->port->serial);
2235         struct device *dev = &edge_port->port->dev;
2236         unsigned char *cmdBuffer;
2237         unsigned char *currCmd;
2238         int cmdLen = 0;
2239         int divisor;
2240         int status;
2241         u32 number = edge_port->port->port_number;
2242
2243         if (edge_serial->is_epic &&
2244             !edge_serial->epic_descriptor.Supports.IOSPSetBaudRate) {
2245                 dev_dbg(dev, "SendCmdWriteBaudRate - NOT Setting baud rate for port, baud = %d\n",
2246                         baudRate);
2247                 return 0;
2248         }
2249
2250         dev_dbg(dev, "%s - baud = %d\n", __func__, baudRate);
2251
2252         status = calc_baud_rate_divisor(dev, baudRate, &divisor);
2253         if (status) {
2254                 dev_err(dev, "%s - bad baud rate\n", __func__);
2255                 return status;
2256         }
2257
2258         /* Alloc memory for the string of commands. */
2259         cmdBuffer =  kmalloc(0x100, GFP_ATOMIC);
2260         if (!cmdBuffer)
2261                 return -ENOMEM;
2262
2263         currCmd = cmdBuffer;
2264
2265         /* Enable access to divisor latch */
2266         MAKE_CMD_WRITE_REG(&currCmd, &cmdLen, number, LCR, LCR_DL_ENABLE);
2267
2268         /* Write the divisor itself */
2269         MAKE_CMD_WRITE_REG(&currCmd, &cmdLen, number, DLL, LOW8(divisor));
2270         MAKE_CMD_WRITE_REG(&currCmd, &cmdLen, number, DLM, HIGH8(divisor));
2271
2272         /* Restore original value to disable access to divisor latch */
2273         MAKE_CMD_WRITE_REG(&currCmd, &cmdLen, number, LCR,
2274                                                 edge_port->shadowLCR);
2275
2276         status = write_cmd_usb(edge_port, cmdBuffer, cmdLen);
2277         if (status) {
2278                 /* something bad happened, let's free up the memory */
2279                 kfree(cmdBuffer);
2280         }
2281
2282         return status;
2283 }
2284
2285
2286 /*****************************************************************************
2287  * calc_baud_rate_divisor
2288  *      this function calculates the proper baud rate divisor for the specified
2289  *      baud rate.
2290  *****************************************************************************/
2291 static int calc_baud_rate_divisor(struct device *dev, int baudrate, int *divisor)
2292 {
2293         int i;
2294         __u16 custom;
2295
2296         for (i = 0; i < ARRAY_SIZE(divisor_table); i++) {
2297                 if (divisor_table[i].BaudRate == baudrate) {
2298                         *divisor = divisor_table[i].Divisor;
2299                         return 0;
2300                 }
2301         }
2302
2303         /* We have tried all of the standard baud rates
2304          * lets try to calculate the divisor for this baud rate
2305          * Make sure the baud rate is reasonable */
2306         if (baudrate > 50 && baudrate < 230400) {
2307                 /* get divisor */
2308                 custom = (__u16)((230400L + baudrate/2) / baudrate);
2309
2310                 *divisor = custom;
2311
2312                 dev_dbg(dev, "%s - Baud %d = %d\n", __func__, baudrate, custom);
2313                 return 0;
2314         }
2315
2316         return -1;
2317 }
2318
2319
2320 /*****************************************************************************
2321  * send_cmd_write_uart_register
2322  *  this function builds up a uart register message and sends to the device.
2323  *****************************************************************************/
2324 static int send_cmd_write_uart_register(struct edgeport_port *edge_port,
2325                                                 __u8 regNum, __u8 regValue)
2326 {
2327         struct edgeport_serial *edge_serial =
2328                                 usb_get_serial_data(edge_port->port->serial);
2329         struct device *dev = &edge_port->port->dev;
2330         unsigned char *cmdBuffer;
2331         unsigned char *currCmd;
2332         unsigned long cmdLen = 0;
2333         int status;
2334
2335         dev_dbg(dev, "%s - write to %s register 0x%02x\n",
2336                 (regNum == MCR) ? "MCR" : "LCR", __func__, regValue);
2337
2338         if (edge_serial->is_epic &&
2339             !edge_serial->epic_descriptor.Supports.IOSPWriteMCR &&
2340             regNum == MCR) {
2341                 dev_dbg(dev, "SendCmdWriteUartReg - Not writing to MCR Register\n");
2342                 return 0;
2343         }
2344
2345         if (edge_serial->is_epic &&
2346             !edge_serial->epic_descriptor.Supports.IOSPWriteLCR &&
2347             regNum == LCR) {
2348                 dev_dbg(dev, "SendCmdWriteUartReg - Not writing to LCR Register\n");
2349                 return 0;
2350         }
2351
2352         /* Alloc memory for the string of commands. */
2353         cmdBuffer = kmalloc(0x10, GFP_ATOMIC);
2354         if (cmdBuffer == NULL)
2355                 return -ENOMEM;
2356
2357         currCmd = cmdBuffer;
2358
2359         /* Build a cmd in the buffer to write the given register */
2360         MAKE_CMD_WRITE_REG(&currCmd, &cmdLen, edge_port->port->port_number,
2361                            regNum, regValue);
2362
2363         status = write_cmd_usb(edge_port, cmdBuffer, cmdLen);
2364         if (status) {
2365                 /* something bad happened, let's free up the memory */
2366                 kfree(cmdBuffer);
2367         }
2368
2369         return status;
2370 }
2371
2372
2373 /*****************************************************************************
2374  * change_port_settings
2375  *      This routine is called to set the UART on the device to match the
2376  *      specified new settings.
2377  *****************************************************************************/
2378
2379 static void change_port_settings(struct tty_struct *tty,
2380         struct edgeport_port *edge_port, struct ktermios *old_termios)
2381 {
2382         struct device *dev = &edge_port->port->dev;
2383         struct edgeport_serial *edge_serial =
2384                         usb_get_serial_data(edge_port->port->serial);
2385         int baud;
2386         unsigned cflag;
2387         __u8 mask = 0xff;
2388         __u8 lData;
2389         __u8 lParity;
2390         __u8 lStop;
2391         __u8 rxFlow;
2392         __u8 txFlow;
2393         int status;
2394
2395         if (!edge_port->open &&
2396             !edge_port->openPending) {
2397                 dev_dbg(dev, "%s - port not opened\n", __func__);
2398                 return;
2399         }
2400
2401         cflag = tty->termios.c_cflag;
2402
2403         switch (cflag & CSIZE) {
2404         case CS5:
2405                 lData = LCR_BITS_5; mask = 0x1f;
2406                 dev_dbg(dev, "%s - data bits = 5\n", __func__);
2407                 break;
2408         case CS6:
2409                 lData = LCR_BITS_6; mask = 0x3f;
2410                 dev_dbg(dev, "%s - data bits = 6\n", __func__);
2411                 break;
2412         case CS7:
2413                 lData = LCR_BITS_7; mask = 0x7f;
2414                 dev_dbg(dev, "%s - data bits = 7\n", __func__);
2415                 break;
2416         default:
2417         case CS8:
2418                 lData = LCR_BITS_8;
2419                 dev_dbg(dev, "%s - data bits = 8\n", __func__);
2420                 break;
2421         }
2422
2423         lParity = LCR_PAR_NONE;
2424         if (cflag & PARENB) {
2425                 if (cflag & CMSPAR) {
2426                         if (cflag & PARODD) {
2427                                 lParity = LCR_PAR_MARK;
2428                                 dev_dbg(dev, "%s - parity = mark\n", __func__);
2429                         } else {
2430                                 lParity = LCR_PAR_SPACE;
2431                                 dev_dbg(dev, "%s - parity = space\n", __func__);
2432                         }
2433                 } else if (cflag & PARODD) {
2434                         lParity = LCR_PAR_ODD;
2435                         dev_dbg(dev, "%s - parity = odd\n", __func__);
2436                 } else {
2437                         lParity = LCR_PAR_EVEN;
2438                         dev_dbg(dev, "%s - parity = even\n", __func__);
2439                 }
2440         } else {
2441                 dev_dbg(dev, "%s - parity = none\n", __func__);
2442         }
2443
2444         if (cflag & CSTOPB) {
2445                 lStop = LCR_STOP_2;
2446                 dev_dbg(dev, "%s - stop bits = 2\n", __func__);
2447         } else {
2448                 lStop = LCR_STOP_1;
2449                 dev_dbg(dev, "%s - stop bits = 1\n", __func__);
2450         }
2451
2452         /* figure out the flow control settings */
2453         rxFlow = txFlow = 0x00;
2454         if (cflag & CRTSCTS) {
2455                 rxFlow |= IOSP_RX_FLOW_RTS;
2456                 txFlow |= IOSP_TX_FLOW_CTS;
2457                 dev_dbg(dev, "%s - RTS/CTS is enabled\n", __func__);
2458         } else {
2459                 dev_dbg(dev, "%s - RTS/CTS is disabled\n", __func__);
2460         }
2461
2462         /* if we are implementing XON/XOFF, set the start and stop character
2463            in the device */
2464         if (I_IXOFF(tty) || I_IXON(tty)) {
2465                 unsigned char stop_char  = STOP_CHAR(tty);
2466                 unsigned char start_char = START_CHAR(tty);
2467
2468                 if ((!edge_serial->is_epic) ||
2469                     ((edge_serial->is_epic) &&
2470                      (edge_serial->epic_descriptor.Supports.IOSPSetXChar))) {
2471                         send_iosp_ext_cmd(edge_port,
2472                                         IOSP_CMD_SET_XON_CHAR, start_char);
2473                         send_iosp_ext_cmd(edge_port,
2474                                         IOSP_CMD_SET_XOFF_CHAR, stop_char);
2475                 }
2476
2477                 /* if we are implementing INBOUND XON/XOFF */
2478                 if (I_IXOFF(tty)) {
2479                         rxFlow |= IOSP_RX_FLOW_XON_XOFF;
2480                         dev_dbg(dev, "%s - INBOUND XON/XOFF is enabled, XON = %2x, XOFF = %2x\n",
2481                                 __func__, start_char, stop_char);
2482                 } else {
2483                         dev_dbg(dev, "%s - INBOUND XON/XOFF is disabled\n", __func__);
2484                 }
2485
2486                 /* if we are implementing OUTBOUND XON/XOFF */
2487                 if (I_IXON(tty)) {
2488                         txFlow |= IOSP_TX_FLOW_XON_XOFF;
2489                         dev_dbg(dev, "%s - OUTBOUND XON/XOFF is enabled, XON = %2x, XOFF = %2x\n",
2490                                 __func__, start_char, stop_char);
2491                 } else {
2492                         dev_dbg(dev, "%s - OUTBOUND XON/XOFF is disabled\n", __func__);
2493                 }
2494         }
2495
2496         /* Set flow control to the configured value */
2497         if ((!edge_serial->is_epic) ||
2498             ((edge_serial->is_epic) &&
2499              (edge_serial->epic_descriptor.Supports.IOSPSetRxFlow)))
2500                 send_iosp_ext_cmd(edge_port, IOSP_CMD_SET_RX_FLOW, rxFlow);
2501         if ((!edge_serial->is_epic) ||
2502             ((edge_serial->is_epic) &&
2503              (edge_serial->epic_descriptor.Supports.IOSPSetTxFlow)))
2504                 send_iosp_ext_cmd(edge_port, IOSP_CMD_SET_TX_FLOW, txFlow);
2505
2506
2507         edge_port->shadowLCR &= ~(LCR_BITS_MASK | LCR_STOP_MASK | LCR_PAR_MASK);
2508         edge_port->shadowLCR |= (lData | lParity | lStop);
2509
2510         edge_port->validDataMask = mask;
2511
2512         /* Send the updated LCR value to the EdgePort */
2513         status = send_cmd_write_uart_register(edge_port, LCR,
2514                                                         edge_port->shadowLCR);
2515         if (status != 0)
2516                 return;
2517
2518         /* set up the MCR register and send it to the EdgePort */
2519         edge_port->shadowMCR = MCR_MASTER_IE;
2520         if (cflag & CBAUD)
2521                 edge_port->shadowMCR |= (MCR_DTR | MCR_RTS);
2522
2523         status = send_cmd_write_uart_register(edge_port, MCR,
2524                                                 edge_port->shadowMCR);
2525         if (status != 0)
2526                 return;
2527
2528         /* Determine divisor based on baud rate */
2529         baud = tty_get_baud_rate(tty);
2530         if (!baud) {
2531                 /* pick a default, any default... */
2532                 baud = 9600;
2533         }
2534
2535         dev_dbg(dev, "%s - baud rate = %d\n", __func__, baud);
2536         status = send_cmd_write_baud_rate(edge_port, baud);
2537         if (status == -1) {
2538                 /* Speed change was not possible - put back the old speed */
2539                 baud = tty_termios_baud_rate(old_termios);
2540                 tty_encode_baud_rate(tty, baud, baud);
2541         }
2542 }
2543
2544
2545 /****************************************************************************
2546  * unicode_to_ascii
2547  *      Turns a string from Unicode into ASCII.
2548  *      Doesn't do a good job with any characters that are outside the normal
2549  *      ASCII range, but it's only for debugging...
2550  *      NOTE: expects the unicode in LE format
2551  ****************************************************************************/
2552 static void unicode_to_ascii(char *string, int buflen,
2553                                         __le16 *unicode, int unicode_size)
2554 {
2555         int i;
2556
2557         if (buflen <= 0)        /* never happens, but... */
2558                 return;
2559         --buflen;               /* space for nul */
2560
2561         for (i = 0; i < unicode_size; i++) {
2562                 if (i >= buflen)
2563                         break;
2564                 string[i] = (char)(le16_to_cpu(unicode[i]));
2565         }
2566         string[i] = 0x00;
2567 }
2568
2569
2570 /****************************************************************************
2571  * get_manufacturing_desc
2572  *      reads in the manufacturing descriptor and stores it into the serial
2573  *      structure.
2574  ****************************************************************************/
2575 static void get_manufacturing_desc(struct edgeport_serial *edge_serial)
2576 {
2577         struct device *dev = &edge_serial->serial->dev->dev;
2578         int response;
2579
2580         dev_dbg(dev, "getting manufacturer descriptor\n");
2581
2582         response = rom_read(edge_serial->serial,
2583                                 (EDGE_MANUF_DESC_ADDR & 0xffff0000) >> 16,
2584                                 (__u16)(EDGE_MANUF_DESC_ADDR & 0x0000ffff),
2585                                 EDGE_MANUF_DESC_LEN,
2586                                 (__u8 *)(&edge_serial->manuf_descriptor));
2587
2588         if (response < 1)
2589                 dev_err(dev, "error in getting manufacturer descriptor\n");
2590         else {
2591                 char string[30];
2592                 dev_dbg(dev, "**Manufacturer Descriptor\n");
2593                 dev_dbg(dev, "  RomSize:        %dK\n",
2594                         edge_serial->manuf_descriptor.RomSize);
2595                 dev_dbg(dev, "  RamSize:        %dK\n",
2596                         edge_serial->manuf_descriptor.RamSize);
2597                 dev_dbg(dev, "  CpuRev:         %d\n",
2598                         edge_serial->manuf_descriptor.CpuRev);
2599                 dev_dbg(dev, "  BoardRev:       %d\n",
2600                         edge_serial->manuf_descriptor.BoardRev);
2601                 dev_dbg(dev, "  NumPorts:       %d\n",
2602                         edge_serial->manuf_descriptor.NumPorts);
2603                 dev_dbg(dev, "  DescDate:       %d/%d/%d\n",
2604                         edge_serial->manuf_descriptor.DescDate[0],
2605                         edge_serial->manuf_descriptor.DescDate[1],
2606                         edge_serial->manuf_descriptor.DescDate[2]+1900);
2607                 unicode_to_ascii(string, sizeof(string),
2608                         edge_serial->manuf_descriptor.SerialNumber,
2609                         edge_serial->manuf_descriptor.SerNumLength/2);
2610                 dev_dbg(dev, "  SerialNumber: %s\n", string);
2611                 unicode_to_ascii(string, sizeof(string),
2612                         edge_serial->manuf_descriptor.AssemblyNumber,
2613                         edge_serial->manuf_descriptor.AssemblyNumLength/2);
2614                 dev_dbg(dev, "  AssemblyNumber: %s\n", string);
2615                 unicode_to_ascii(string, sizeof(string),
2616                     edge_serial->manuf_descriptor.OemAssyNumber,
2617                     edge_serial->manuf_descriptor.OemAssyNumLength/2);
2618                 dev_dbg(dev, "  OemAssyNumber:  %s\n", string);
2619                 dev_dbg(dev, "  UartType:       %d\n",
2620                         edge_serial->manuf_descriptor.UartType);
2621                 dev_dbg(dev, "  IonPid:         %d\n",
2622                         edge_serial->manuf_descriptor.IonPid);
2623                 dev_dbg(dev, "  IonConfig:      %d\n",
2624                         edge_serial->manuf_descriptor.IonConfig);
2625         }
2626 }
2627
2628
2629 /****************************************************************************
2630  * get_boot_desc
2631  *      reads in the bootloader descriptor and stores it into the serial
2632  *      structure.
2633  ****************************************************************************/
2634 static void get_boot_desc(struct edgeport_serial *edge_serial)
2635 {
2636         struct device *dev = &edge_serial->serial->dev->dev;
2637         int response;
2638
2639         dev_dbg(dev, "getting boot descriptor\n");
2640
2641         response = rom_read(edge_serial->serial,
2642                                 (EDGE_BOOT_DESC_ADDR & 0xffff0000) >> 16,
2643                                 (__u16)(EDGE_BOOT_DESC_ADDR & 0x0000ffff),
2644                                 EDGE_BOOT_DESC_LEN,
2645                                 (__u8 *)(&edge_serial->boot_descriptor));
2646
2647         if (response < 1)
2648                 dev_err(dev, "error in getting boot descriptor\n");
2649         else {
2650                 dev_dbg(dev, "**Boot Descriptor:\n");
2651                 dev_dbg(dev, "  BootCodeLength: %d\n",
2652                         le16_to_cpu(edge_serial->boot_descriptor.BootCodeLength));
2653                 dev_dbg(dev, "  MajorVersion:   %d\n",
2654                         edge_serial->boot_descriptor.MajorVersion);
2655                 dev_dbg(dev, "  MinorVersion:   %d\n",
2656                         edge_serial->boot_descriptor.MinorVersion);
2657                 dev_dbg(dev, "  BuildNumber:    %d\n",
2658                         le16_to_cpu(edge_serial->boot_descriptor.BuildNumber));
2659                 dev_dbg(dev, "  Capabilities:   0x%x\n",
2660                       le16_to_cpu(edge_serial->boot_descriptor.Capabilities));
2661                 dev_dbg(dev, "  UConfig0:       %d\n",
2662                         edge_serial->boot_descriptor.UConfig0);
2663                 dev_dbg(dev, "  UConfig1:       %d\n",
2664                         edge_serial->boot_descriptor.UConfig1);
2665         }
2666 }
2667
2668
2669 /****************************************************************************
2670  * load_application_firmware
2671  *      This is called to load the application firmware to the device
2672  ****************************************************************************/
2673 static void load_application_firmware(struct edgeport_serial *edge_serial)
2674 {
2675         struct device *dev = &edge_serial->serial->dev->dev;
2676         const struct ihex_binrec *rec;
2677         const struct firmware *fw;
2678         const char *fw_name;
2679         const char *fw_info;
2680         int response;
2681         __u32 Operaddr;
2682         __u16 build;
2683
2684         switch (edge_serial->product_info.iDownloadFile) {
2685                 case EDGE_DOWNLOAD_FILE_I930:
2686                         fw_info = "downloading firmware version (930)";
2687                         fw_name = "edgeport/down.fw";
2688                         break;
2689
2690                 case EDGE_DOWNLOAD_FILE_80251:
2691                         fw_info = "downloading firmware version (80251)";
2692                         fw_name = "edgeport/down2.fw";
2693                         break;
2694
2695                 case EDGE_DOWNLOAD_FILE_NONE:
2696                         dev_dbg(dev, "No download file specified, skipping download\n");
2697                         return;
2698
2699                 default:
2700                         return;
2701         }
2702
2703         response = request_ihex_firmware(&fw, fw_name,
2704                                     &edge_serial->serial->dev->dev);
2705         if (response) {
2706                 dev_err(dev, "Failed to load image \"%s\" err %d\n",
2707                        fw_name, response);
2708                 return;
2709         }
2710
2711         rec = (const struct ihex_binrec *)fw->data;
2712         build = (rec->data[2] << 8) | rec->data[3];
2713
2714         dev_dbg(dev, "%s %d.%d.%d\n", fw_info, rec->data[0], rec->data[1], build);
2715
2716         edge_serial->product_info.FirmwareMajorVersion = rec->data[0];
2717         edge_serial->product_info.FirmwareMinorVersion = rec->data[1];
2718         edge_serial->product_info.FirmwareBuildNumber = cpu_to_le16(build);
2719
2720         for (rec = ihex_next_binrec(rec); rec;
2721              rec = ihex_next_binrec(rec)) {
2722                 Operaddr = be32_to_cpu(rec->addr);
2723                 response = sram_write(edge_serial->serial,
2724                                      Operaddr >> 16,
2725                                      Operaddr & 0xFFFF,
2726                                      be16_to_cpu(rec->len),
2727                                      &rec->data[0]);
2728                 if (response < 0) {
2729                         dev_err(&edge_serial->serial->dev->dev,
2730                                 "sram_write failed (%x, %x, %d)\n",
2731                                 Operaddr >> 16, Operaddr & 0xFFFF,
2732                                 be16_to_cpu(rec->len));
2733                         break;
2734                 }
2735         }
2736
2737         dev_dbg(dev, "sending exec_dl_code\n");
2738         response = usb_control_msg (edge_serial->serial->dev,
2739                                     usb_sndctrlpipe(edge_serial->serial->dev, 0),
2740                                     USB_REQUEST_ION_EXEC_DL_CODE,
2741                                     0x40, 0x4000, 0x0001, NULL, 0, 3000);
2742
2743         release_firmware(fw);
2744 }
2745
2746
2747 /****************************************************************************
2748  * edge_startup
2749  ****************************************************************************/
2750 static int edge_startup(struct usb_serial *serial)
2751 {
2752         struct edgeport_serial *edge_serial;
2753         struct usb_device *dev;
2754         struct device *ddev = &serial->dev->dev;
2755         int i;
2756         int response;
2757         bool interrupt_in_found;
2758         bool bulk_in_found;
2759         bool bulk_out_found;
2760         static __u32 descriptor[3] = {  EDGE_COMPATIBILITY_MASK0,
2761                                         EDGE_COMPATIBILITY_MASK1,
2762                                         EDGE_COMPATIBILITY_MASK2 };
2763
2764         dev = serial->dev;
2765
2766         /* create our private serial structure */
2767         edge_serial = kzalloc(sizeof(struct edgeport_serial), GFP_KERNEL);
2768         if (!edge_serial)
2769                 return -ENOMEM;
2770
2771         spin_lock_init(&edge_serial->es_lock);
2772         edge_serial->serial = serial;
2773         usb_set_serial_data(serial, edge_serial);
2774
2775         /* get the name for the device from the device */
2776         i = usb_string(dev, dev->descriptor.iManufacturer,
2777             &edge_serial->name[0], MAX_NAME_LEN+1);
2778         if (i < 0)
2779                 i = 0;
2780         edge_serial->name[i++] = ' ';
2781         usb_string(dev, dev->descriptor.iProduct,
2782             &edge_serial->name[i], MAX_NAME_LEN+2 - i);
2783
2784         dev_info(&serial->dev->dev, "%s detected\n", edge_serial->name);
2785
2786         /* Read the epic descriptor */
2787         if (get_epic_descriptor(edge_serial) <= 0) {
2788                 /* memcpy descriptor to Supports structures */
2789                 memcpy(&edge_serial->epic_descriptor.Supports, descriptor,
2790                        sizeof(struct edge_compatibility_bits));
2791
2792                 /* get the manufacturing descriptor for this device */
2793                 get_manufacturing_desc(edge_serial);
2794
2795                 /* get the boot descriptor */
2796                 get_boot_desc(edge_serial);
2797
2798                 get_product_info(edge_serial);
2799         }
2800
2801         /* set the number of ports from the manufacturing description */
2802         /* serial->num_ports = serial->product_info.NumPorts; */
2803         if ((!edge_serial->is_epic) &&
2804             (edge_serial->product_info.NumPorts != serial->num_ports)) {
2805                 dev_warn(ddev,
2806                         "Device Reported %d serial ports vs. core thinking we have %d ports, email greg@kroah.com this information.\n",
2807                          edge_serial->product_info.NumPorts,
2808                          serial->num_ports);
2809         }
2810
2811         dev_dbg(ddev, "%s - time 1 %ld\n", __func__, jiffies);
2812
2813         /* If not an EPiC device */
2814         if (!edge_serial->is_epic) {
2815                 /* now load the application firmware into this device */
2816                 load_application_firmware(edge_serial);
2817
2818                 dev_dbg(ddev, "%s - time 2 %ld\n", __func__, jiffies);
2819
2820                 /* Check current Edgeport EEPROM and update if necessary */
2821                 update_edgeport_E2PROM(edge_serial);
2822
2823                 dev_dbg(ddev, "%s - time 3 %ld\n", __func__, jiffies);
2824
2825                 /* set the configuration to use #1 */
2826 /*              dev_dbg(ddev, "set_configuration 1\n"); */
2827 /*              usb_set_configuration (dev, 1); */
2828         }
2829         dev_dbg(ddev, "  FirmwareMajorVersion  %d.%d.%d\n",
2830             edge_serial->product_info.FirmwareMajorVersion,
2831             edge_serial->product_info.FirmwareMinorVersion,
2832             le16_to_cpu(edge_serial->product_info.FirmwareBuildNumber));
2833
2834         /* we set up the pointers to the endpoints in the edge_open function,
2835          * as the structures aren't created yet. */
2836
2837         response = 0;
2838
2839         if (edge_serial->is_epic) {
2840                 /* EPIC thing, set up our interrupt polling now and our read
2841                  * urb, so that the device knows it really is connected. */
2842                 interrupt_in_found = bulk_in_found = bulk_out_found = false;
2843                 for (i = 0; i < serial->interface->altsetting[0]
2844                                                 .desc.bNumEndpoints; ++i) {
2845                         struct usb_endpoint_descriptor *endpoint;
2846                         int buffer_size;
2847
2848                         endpoint = &serial->interface->altsetting[0].
2849                                                         endpoint[i].desc;
2850                         buffer_size = usb_endpoint_maxp(endpoint);
2851                         if (!interrupt_in_found &&
2852                             (usb_endpoint_is_int_in(endpoint))) {
2853                                 /* we found a interrupt in endpoint */
2854                                 dev_dbg(ddev, "found interrupt in\n");
2855
2856                                 /* not set up yet, so do it now */
2857                                 edge_serial->interrupt_read_urb =
2858                                                 usb_alloc_urb(0, GFP_KERNEL);
2859                                 if (!edge_serial->interrupt_read_urb)
2860                                         return -ENOMEM;
2861
2862                                 edge_serial->interrupt_in_buffer =
2863                                         kmalloc(buffer_size, GFP_KERNEL);
2864                                 if (!edge_serial->interrupt_in_buffer) {
2865                                         usb_free_urb(edge_serial->interrupt_read_urb);
2866                                         return -ENOMEM;
2867                                 }
2868                                 edge_serial->interrupt_in_endpoint =
2869                                                 endpoint->bEndpointAddress;
2870
2871                                 /* set up our interrupt urb */
2872                                 usb_fill_int_urb(
2873                                         edge_serial->interrupt_read_urb,
2874                                         dev,
2875                                         usb_rcvintpipe(dev,
2876                                                 endpoint->bEndpointAddress),
2877                                         edge_serial->interrupt_in_buffer,
2878                                         buffer_size,
2879                                         edge_interrupt_callback,
2880                                         edge_serial,
2881                                         endpoint->bInterval);
2882
2883                                 interrupt_in_found = true;
2884                         }
2885
2886                         if (!bulk_in_found &&
2887                                 (usb_endpoint_is_bulk_in(endpoint))) {
2888                                 /* we found a bulk in endpoint */
2889                                 dev_dbg(ddev, "found bulk in\n");
2890
2891                                 /* not set up yet, so do it now */
2892                                 edge_serial->read_urb =
2893                                                 usb_alloc_urb(0, GFP_KERNEL);
2894                                 if (!edge_serial->read_urb)
2895                                         return -ENOMEM;
2896
2897                                 edge_serial->bulk_in_buffer =
2898                                         kmalloc(buffer_size, GFP_KERNEL);
2899                                 if (!edge_serial->bulk_in_buffer) {
2900                                         usb_free_urb(edge_serial->read_urb);
2901                                         return -ENOMEM;
2902                                 }
2903                                 edge_serial->bulk_in_endpoint =
2904                                                 endpoint->bEndpointAddress;
2905
2906                                 /* set up our bulk in urb */
2907                                 usb_fill_bulk_urb(edge_serial->read_urb, dev,
2908                                         usb_rcvbulkpipe(dev,
2909                                                 endpoint->bEndpointAddress),
2910                                         edge_serial->bulk_in_buffer,
2911                                         usb_endpoint_maxp(endpoint),
2912                                         edge_bulk_in_callback,
2913                                         edge_serial);
2914                                 bulk_in_found = true;
2915                         }
2916
2917                         if (!bulk_out_found &&
2918                             (usb_endpoint_is_bulk_out(endpoint))) {
2919                                 /* we found a bulk out endpoint */
2920                                 dev_dbg(ddev, "found bulk out\n");
2921                                 edge_serial->bulk_out_endpoint =
2922                                                 endpoint->bEndpointAddress;
2923                                 bulk_out_found = true;
2924                         }
2925                 }
2926
2927                 if (!interrupt_in_found || !bulk_in_found || !bulk_out_found) {
2928                         dev_err(ddev, "Error - the proper endpoints were not found!\n");
2929                         return -ENODEV;
2930                 }
2931
2932                 /* start interrupt read for this edgeport this interrupt will
2933                  * continue as long as the edgeport is connected */
2934                 response = usb_submit_urb(edge_serial->interrupt_read_urb,
2935                                                                 GFP_KERNEL);
2936                 if (response)
2937                         dev_err(ddev, "%s - Error %d submitting control urb\n",
2938                                 __func__, response);
2939         }
2940         return response;
2941 }
2942
2943
2944 /****************************************************************************
2945  * edge_disconnect
2946  *      This function is called whenever the device is removed from the usb bus.
2947  ****************************************************************************/
2948 static void edge_disconnect(struct usb_serial *serial)
2949 {
2950         struct edgeport_serial *edge_serial = usb_get_serial_data(serial);
2951
2952         /* stop reads and writes on all ports */
2953         /* free up our endpoint stuff */
2954         if (edge_serial->is_epic) {
2955                 usb_kill_urb(edge_serial->interrupt_read_urb);
2956                 usb_free_urb(edge_serial->interrupt_read_urb);
2957                 kfree(edge_serial->interrupt_in_buffer);
2958
2959                 usb_kill_urb(edge_serial->read_urb);
2960                 usb_free_urb(edge_serial->read_urb);
2961                 kfree(edge_serial->bulk_in_buffer);
2962         }
2963 }
2964
2965
2966 /****************************************************************************
2967  * edge_release
2968  *      This function is called when the device structure is deallocated.
2969  ****************************************************************************/
2970 static void edge_release(struct usb_serial *serial)
2971 {
2972         struct edgeport_serial *edge_serial = usb_get_serial_data(serial);
2973
2974         kfree(edge_serial);
2975 }
2976
2977 static int edge_port_probe(struct usb_serial_port *port)
2978 {
2979         struct edgeport_port *edge_port;
2980
2981         edge_port = kzalloc(sizeof(*edge_port), GFP_KERNEL);
2982         if (!edge_port)
2983                 return -ENOMEM;
2984
2985         spin_lock_init(&edge_port->ep_lock);
2986         edge_port->port = port;
2987
2988         usb_set_serial_port_data(port, edge_port);
2989
2990         return 0;
2991 }
2992
2993 static int edge_port_remove(struct usb_serial_port *port)
2994 {
2995         struct edgeport_port *edge_port;
2996
2997         edge_port = usb_get_serial_port_data(port);
2998         kfree(edge_port);
2999
3000         return 0;
3001 }
3002
3003 module_usb_serial_driver(serial_drivers, id_table_combined);
3004
3005 MODULE_AUTHOR(DRIVER_AUTHOR);
3006 MODULE_DESCRIPTION(DRIVER_DESC);
3007 MODULE_LICENSE("GPL");
3008 MODULE_FIRMWARE("edgeport/boot.fw");
3009 MODULE_FIRMWARE("edgeport/boot2.fw");
3010 MODULE_FIRMWARE("edgeport/down.fw");
3011 MODULE_FIRMWARE("edgeport/down2.fw");