drivers/usb/serial/io_edgeport.c

   1 /*
   2  * Edgeport USB Serial Converter driver
   3  *
   4  * Copyright (C) 2000 Inside Out Networks, All rights reserved.
   5  * Copyright (C) 2001-2002 Greg Kroah-Hartman <greg@kroah.com>
   6  *
   7  *      This program is free software; you can redistribute it and/or modify
   8  *      it under the terms of the GNU General Public License as published by
   9  *      the Free Software Foundation; either version 2 of the License, or
  10  *      (at your option) any later version.
  11  *
  12  * Supports the following devices:
  13  *      Edgeport/4
  14  *      Edgeport/4t
  15  *      Edgeport/2
  16  *      Edgeport/4i
  17  *      Edgeport/2i
  18  *      Edgeport/421
  19  *      Edgeport/21
  20  *      Rapidport/4
  21  *      Edgeport/8
  22  *      Edgeport/2D8
  23  *      Edgeport/4D8
  24  *      Edgeport/8i
  25  *
  26  * For questions or problems with this driver, contact Inside Out
  27  * Networks technical support, or Peter Berger <pberger@brimson.com>,
  28  * or Al Borchers <alborchers@steinerpoint.com>.
  29  *
  30  */
  31
  32 #include <linux/kernel.h>
  33 #include <linux/jiffies.h>
  34 #include <linux/errno.h>
  35 #include <linux/init.h>
  36 #include <linux/slab.h>
  37 #include <linux/tty.h>
  38 #include <linux/tty_driver.h>
  39 #include <linux/tty_flip.h>
  40 #include <linux/module.h>
  41 #include <linux/spinlock.h>
  42 #include <linux/serial.h>
  43 #include <linux/ioctl.h>
  44 #include <linux/wait.h>
  45 #include <linux/firmware.h>
  46 #include <linux/ihex.h>
  47 #include <linux/uaccess.h>
  48 #include <linux/usb.h>
  49 #include <linux/usb/serial.h>
  50 #include "io_edgeport.h"
  51 #include "io_ionsp.h"           /* info for the iosp messages */
  52 #include "io_16654.h"           /* 16654 UART defines */
  53
  54 /*
  55  * Version Information
  56  */
  57 #define DRIVER_VERSION "v2.7"
  58 #define DRIVER_AUTHOR "Greg Kroah-Hartman <greg@kroah.com> and David Iacovelli"
  59 #define DRIVER_DESC "Edgeport USB Serial Driver"
  60
  61 #define MAX_NAME_LEN            64
  62
  63 #define CHASE_TIMEOUT           (5*HZ)          /* 5 seconds */
  64 #define OPEN_TIMEOUT            (5*HZ)          /* 5 seconds */
  65 #define COMMAND_TIMEOUT         (5*HZ)          /* 5 seconds */
  66
  67 /* receive port state */
  68 enum RXSTATE {
  69         EXPECT_HDR1 = 0,    /* Expect header byte 1 */
  70         EXPECT_HDR2 = 1,    /* Expect header byte 2 */
  71         EXPECT_DATA = 2,    /* Expect 'RxBytesRemaining' data */
  72         EXPECT_HDR3 = 3,    /* Expect header byte 3 (for status hdrs only) */
  73 };
  74
  75
  76 /* Transmit Fifo
  77  * This Transmit queue is an extension of the edgeport Rx buffer.
  78  * The maximum amount of data buffered in both the edgeport
  79  * Rx buffer (maxTxCredits) and this buffer will never exceed maxTxCredits.
  80  */
  81 struct TxFifo {
  82         unsigned int    head;   /* index to head pointer (write) */
  83         unsigned int    tail;   /* index to tail pointer (read)  */
  84         unsigned int    count;  /* Bytes in queue */
  85         unsigned int    size;   /* Max size of queue (equal to Max number of TxCredits) */
  86         unsigned char   *fifo;  /* allocated Buffer */
  87 };
  88
  89 /* This structure holds all of the local port information */
  90 struct edgeport_port {
  91         __u16                   txCredits;              /* our current credits for this port */
  92         __u16                   maxTxCredits;           /* the max size of the port */
  93
  94         struct TxFifo           txfifo;                 /* transmit fifo -- size will be maxTxCredits */
  95         struct urb              *write_urb;             /* write URB for this port */
  96         bool                    write_in_progress;      /* 'true' while a write URB is outstanding */
  97         spinlock_t              ep_lock;
  98
  99         __u8                    shadowLCR;              /* last LCR value received */
 100         __u8                    shadowMCR;              /* last MCR value received */
 101         __u8                    shadowMSR;              /* last MSR value received */
 102         __u8                    shadowLSR;              /* last LSR value received */
 103         __u8                    shadowXonChar;          /* last value set as XON char in Edgeport */
 104         __u8                    shadowXoffChar;         /* last value set as XOFF char in Edgeport */
 105         __u8                    validDataMask;
 106         __u32                   baudRate;
 107
 108         bool                    open;
 109         bool                    openPending;
 110         bool                    commandPending;
 111         bool                    closePending;
 112         bool                    chaseResponsePending;
 113
 114         wait_queue_head_t       wait_chase;             /* for handling sleeping while waiting for chase to finish */
 115         wait_queue_head_t       wait_open;              /* for handling sleeping while waiting for open to finish */
 116         wait_queue_head_t       wait_command;           /* for handling sleeping while waiting for command to finish */
 117         wait_queue_head_t       delta_msr_wait;         /* for handling sleeping while waiting for msr change to happen */
 118
 119         struct async_icount     icount;
 120         struct usb_serial_port  *port;                  /* loop back to the owner of this object */
 121 };
 122
 123
 124 /* This structure holds all of the individual device information */
 125 struct edgeport_serial {
 126         char                    name[MAX_NAME_LEN+2];           /* string name of this device */
 127
 128         struct edge_manuf_descriptor    manuf_descriptor;       /* the manufacturer descriptor */
 129         struct edge_boot_descriptor     boot_descriptor;        /* the boot firmware descriptor */
 130         struct edgeport_product_info    product_info;           /* Product Info */
 131         struct edge_compatibility_descriptor epic_descriptor;   /* Edgeport compatible descriptor */
 132         int                     is_epic;                        /* flag if EPiC device or not */
 133
 134         __u8                    interrupt_in_endpoint;          /* the interrupt endpoint handle */
 135         unsigned char           *interrupt_in_buffer;           /* the buffer we use for the interrupt endpoint */
 136         struct urb              *interrupt_read_urb;            /* our interrupt urb */
 137
 138         __u8                    bulk_in_endpoint;               /* the bulk in endpoint handle */
 139         unsigned char           *bulk_in_buffer;                /* the buffer we use for the bulk in endpoint */
 140         struct urb              *read_urb;                      /* our bulk read urb */
 141         bool                    read_in_progress;
 142         spinlock_t              es_lock;
 143
 144         __u8                    bulk_out_endpoint;              /* the bulk out endpoint handle */
 145
 146         __s16                   rxBytesAvail;                   /* the number of bytes that we need to read from this device */
 147
 148         enum RXSTATE            rxState;                        /* the current state of the bulk receive processor */
 149         __u8                    rxHeader1;                      /* receive header byte 1 */
 150         __u8                    rxHeader2;                      /* receive header byte 2 */
 151         __u8                    rxHeader3;                      /* receive header byte 3 */
 152         __u8                    rxPort;                         /* the port that we are currently receiving data for */
 153         __u8                    rxStatusCode;                   /* the receive status code */
 154         __u8                    rxStatusParam;                  /* the receive status paramater */
 155         __s16                   rxBytesRemaining;               /* the number of port bytes left to read */
 156         struct usb_serial       *serial;                        /* loop back to the owner of this object */
 157 };
 158
 159 /* baud rate information */
 160 struct divisor_table_entry {
 161         __u32   BaudRate;
 162         __u16  Divisor;
 163 };
 164
 165 /*
 166  * Define table of divisors for Rev A EdgePort/4 hardware
 167  * These assume a 3.6864MHz crystal, the standard /16, and
 168  * MCR.7 = 0.
 169  */
 170
 171 static const struct divisor_table_entry divisor_table[] = {
 172         {   50,         4608},
 173         {   75,         3072},
 174         {   110,        2095},  /* 2094.545455 => 230450   => .0217 % over */
 175         {   134,        1713},  /* 1713.011152 => 230398.5 => .00065% under */
 176         {   150,        1536},
 177         {   300,        768},
 178         {   600,        384},
 179         {   1200,       192},
 180         {   1800,       128},
 181         {   2400,       96},
 182         {   4800,       48},
 183         {   7200,       32},
 184         {   9600,       24},
 185         {   14400,      16},
 186         {   19200,      12},
 187         {   38400,      6},
 188         {   57600,      4},
 189         {   115200,     2},
 190         {   230400,     1},
 191 };
 192
 193 /* local variables */
 194 static int debug;
 195
 196 static atomic_t CmdUrbs;        /* Number of outstanding Command Write Urbs */
 197
 198
 199 /* local function prototypes */
 200
 201 /* function prototypes for all URB callbacks */
 202 static void edge_interrupt_callback(struct urb *urb);
 203 static void edge_bulk_in_callback(struct urb *urb);
 204 static void edge_bulk_out_data_callback(struct urb *urb);
 205 static void edge_bulk_out_cmd_callback(struct urb *urb);
 206
 207 /* function prototypes for the usbserial callbacks */
 208 static int edge_open(struct tty_struct *tty, struct usb_serial_port *port,
 209                                         struct file *filp);
 210 static void edge_close(struct tty_struct *tty, struct usb_serial_port *port,
 211                                         struct file *filp);
 212 static int edge_write(struct tty_struct *tty, struct usb_serial_port *port,
 213                                         const unsigned char *buf, int count);
 214 static int edge_write_room(struct tty_struct *tty);
 215 static int edge_chars_in_buffer(struct tty_struct *tty);
 216 static void edge_throttle(struct tty_struct *tty);
 217 static void edge_unthrottle(struct tty_struct *tty);
 218 static void edge_set_termios(struct tty_struct *tty,
 219                                         struct usb_serial_port *port,
 220                                         struct ktermios *old_termios);
 221 static int  edge_ioctl(struct tty_struct *tty, struct file *file,
 222                                         unsigned int cmd, unsigned long arg);
 223 static void edge_break(struct tty_struct *tty, int break_state);
 224 static int  edge_tiocmget(struct tty_struct *tty, struct file *file);
 225 static int  edge_tiocmset(struct tty_struct *tty, struct file *file,
 226                                         unsigned int set, unsigned int clear);
 227 static int  edge_startup(struct usb_serial *serial);
 228 static void edge_shutdown(struct usb_serial *serial);
 229
 230 #include "io_tables.h"  /* all of the devices that this driver supports */
 231
 232 /* function prototypes for all of our local functions */
 233
 234 static void  process_rcvd_data(struct edgeport_serial *edge_serial,
 235                                 unsigned char *buffer, __u16 bufferLength);
 236 static void process_rcvd_status(struct edgeport_serial *edge_serial,
 237                                 __u8 byte2, __u8 byte3);
 238 static void edge_tty_recv(struct device *dev, struct tty_struct *tty,
 239                                 unsigned char *data, int length);
 240 static void handle_new_msr(struct edgeport_port *edge_port, __u8 newMsr);
 241 static void handle_new_lsr(struct edgeport_port *edge_port, __u8 lsrData,
 242                                 __u8 lsr, __u8 data);
 243 static int  send_iosp_ext_cmd(struct edgeport_port *edge_port, __u8 command,
 244                                 __u8 param);
 245 static int  calc_baud_rate_divisor(int baud_rate, int *divisor);
 246 static int  send_cmd_write_baud_rate(struct edgeport_port *edge_port,
 247                                 int baudRate);
 248 static void change_port_settings(struct tty_struct *tty,
 249                                 struct edgeport_port *edge_port,
 250                                 struct ktermios *old_termios);
 251 static int  send_cmd_write_uart_register(struct edgeport_port *edge_port,
 252                                 __u8 regNum, __u8 regValue);
 253 static int  write_cmd_usb(struct edgeport_port *edge_port,
 254                                 unsigned char *buffer, int writeLength);
 255 static void send_more_port_data(struct edgeport_serial *edge_serial,
 256                                 struct edgeport_port *edge_port);
 257
 258 static int sram_write(struct usb_serial *serial, __u16 extAddr, __u16 addr,
 259                                         __u16 length, const __u8 *data);
 260 static int rom_read(struct usb_serial *serial, __u16 extAddr, __u16 addr,
 261                                                 __u16 length, __u8 *data);
 262 static int rom_write(struct usb_serial *serial, __u16 extAddr, __u16 addr,
 263                                         __u16 length, const __u8 *data);
 264 static void get_manufacturing_desc(struct edgeport_serial *edge_serial);
 265 static void get_boot_desc(struct edgeport_serial *edge_serial);
 266 static void load_application_firmware(struct edgeport_serial *edge_serial);
 267
 268 static void unicode_to_ascii(char *string, int buflen,
 269                                 __le16 *unicode, int unicode_size);
 270
 271
 272 /* ************************************************************************ */
 273 /* ************************************************************************ */
 274 /* ************************************************************************ */
 275 /* ************************************************************************ */
 276
 277 /************************************************************************
 278  *                                                                      *
 279  * update_edgeport_E2PROM()     Compare current versions of             *
 280  *                              Boot ROM and Manufacture                *
 281  *                              Descriptors with versions               *
 282  *                              embedded in this driver                 *
 283  *                                                                      *
 284  ************************************************************************/
 285 static void update_edgeport_E2PROM(struct edgeport_serial *edge_serial)
 286 {
 287         __u32 BootCurVer;
 288         __u32 BootNewVer;
 289         __u8 BootMajorVersion;
 290         __u8 BootMinorVersion;
 291         __u16 BootBuildNumber;
 292         __u32 Bootaddr;
 293         const struct ihex_binrec *rec;
 294         const struct firmware *fw;
 295         const char *fw_name;
 296         int response;
 297
 298         switch (edge_serial->product_info.iDownloadFile) {
 299         case EDGE_DOWNLOAD_FILE_I930:
 300                 fw_name = "edgeport/boot.fw";
 301                 break;
 302         case EDGE_DOWNLOAD_FILE_80251:
 303                 fw_name = "edgeport/boot2.fw";
 304                 break;
 305         default:
 306                 return;
 307         }
 308
 309         response = request_ihex_firmware(&fw, fw_name,
 310                                          &edge_serial->serial->dev->dev);
 311         if (response) {
 312                 printk(KERN_ERR "Failed to load image \"%s\" err %d\n",
 313                        fw_name, response);
 314                 return;
 315         }
 316
 317         rec = (const struct ihex_binrec *)fw->data;
 318         BootMajorVersion = rec->data[0];
 319         BootMinorVersion = rec->data[1];
 320         BootBuildNumber = (rec->data[2] << 8) | rec->data[3];
 321
 322         /* Check Boot Image Version */
 323         BootCurVer = (edge_serial->boot_descriptor.MajorVersion << 24) +
 324                      (edge_serial->boot_descriptor.MinorVersion << 16) +
 325                       le16_to_cpu(edge_serial->boot_descriptor.BuildNumber);
 326
 327         BootNewVer = (BootMajorVersion << 24) +
 328                      (BootMinorVersion << 16) +
 329                       BootBuildNumber;
 330
 331         dbg("Current Boot Image version %d.%d.%d",
 332             edge_serial->boot_descriptor.MajorVersion,
 333             edge_serial->boot_descriptor.MinorVersion,
 334             le16_to_cpu(edge_serial->boot_descriptor.BuildNumber));
 335
 336
 337         if (BootNewVer > BootCurVer) {
 338                 dbg("**Update Boot Image from %d.%d.%d to %d.%d.%d",
 339                     edge_serial->boot_descriptor.MajorVersion,
 340                     edge_serial->boot_descriptor.MinorVersion,
 341                     le16_to_cpu(edge_serial->boot_descriptor.BuildNumber),
 342                     BootMajorVersion, BootMinorVersion, BootBuildNumber);
 343
 344                 dbg("Downloading new Boot Image");
 345
 346                 for (rec = ihex_next_binrec(rec); rec;
 347                      rec = ihex_next_binrec(rec)) {
 348                         Bootaddr = be32_to_cpu(rec->addr);
 349                         response = rom_write(edge_serial->serial,
 350                                              Bootaddr >> 16,
 351                                              Bootaddr & 0xFFFF,
 352                                              be16_to_cpu(rec->len),
 353                                              &rec->data[0]);
 354                         if (response < 0) {
 355                                 dev_err(&edge_serial->serial->dev->dev,
 356                                         "rom_write failed (%x, %x, %d)\n",
 357                                         Bootaddr >> 16, Bootaddr & 0xFFFF,
 358                                         be16_to_cpu(rec->len));
 359                                 break;
 360                         }
 361                 }
 362         } else {
 363                 dbg("Boot Image -- already up to date");
 364         }
 365         release_firmware(fw);
 366 }
 367
 368
 369 /************************************************************************
 370  *                                                                      *
 371  *  Get string descriptor from device                                   *
 372  *                                                                      *
 373  ************************************************************************/
 374 static int get_string(struct usb_device *dev, int Id, char *string, int buflen)
 375 {
 376         struct usb_string_descriptor StringDesc;
 377         struct usb_string_descriptor *pStringDesc;
 378
 379         dbg("%s - USB String ID = %d", __func__, Id);
 380
 381         if (!usb_get_descriptor(dev, USB_DT_STRING, Id,
 382                                         &StringDesc, sizeof(StringDesc)))
 383                 return 0;
 384
 385         pStringDesc = kmalloc(StringDesc.bLength, GFP_KERNEL);
 386         if (!pStringDesc)
 387                 return 0;
 388
 389         if (!usb_get_descriptor(dev, USB_DT_STRING, Id,
 390                                         pStringDesc, StringDesc.bLength)) {
 391                 kfree(pStringDesc);
 392                 return 0;
 393         }
 394
 395         unicode_to_ascii(string, buflen,
 396                                 pStringDesc->wData, pStringDesc->bLength/2);
 397
 398         kfree(pStringDesc);
 399         dbg("%s - USB String %s", __func__, string);
 400         return strlen(string);
 401 }
 402
 403
 404 #if 0
 405 /************************************************************************
 406  *
 407  *  Get string descriptor from device
 408  *
 409  ************************************************************************/
 410 static int get_string_desc(struct usb_device *dev, int Id,
 411                                 struct usb_string_descriptor **pRetDesc)
 412 {
 413         struct usb_string_descriptor StringDesc;
 414         struct usb_string_descriptor *pStringDesc;
 415
 416         dbg("%s - USB String ID = %d", __func__, Id);
 417
 418         if (!usb_get_descriptor(dev, USB_DT_STRING, Id, &StringDesc,
 419                                                 sizeof(StringDesc)))
 420                 return 0;
 421
 422         pStringDesc = kmalloc(StringDesc.bLength, GFP_KERNEL);
 423         if (!pStringDesc)
 424                 return -1;
 425
 426         if (!usb_get_descriptor(dev, USB_DT_STRING, Id, pStringDesc,
 427                                                         StringDesc.bLength)) {
 428                 kfree(pStringDesc);
 429                 return -1;
 430         }
 431
 432         *pRetDesc = pStringDesc;
 433         return 0;
 434 }
 435 #endif
 436
 437 static void dump_product_info(struct edgeport_product_info *product_info)
 438 {
 439         /* Dump Product Info structure */
 440         dbg("**Product Information:");
 441         dbg("  ProductId             %x", product_info->ProductId);
 442         dbg("  NumPorts              %d", product_info->NumPorts);
 443         dbg("  ProdInfoVer           %d", product_info->ProdInfoVer);
 444         dbg("  IsServer              %d", product_info->IsServer);
 445         dbg("  IsRS232               %d", product_info->IsRS232);
 446         dbg("  IsRS422               %d", product_info->IsRS422);
 447         dbg("  IsRS485               %d", product_info->IsRS485);
 448         dbg("  RomSize               %d", product_info->RomSize);
 449         dbg("  RamSize               %d", product_info->RamSize);
 450         dbg("  CpuRev                %x", product_info->CpuRev);
 451         dbg("  BoardRev              %x", product_info->BoardRev);
 452         dbg("  BootMajorVersion      %d.%d.%d", product_info->BootMajorVersion,
 453             product_info->BootMinorVersion,
 454             le16_to_cpu(product_info->BootBuildNumber));
 455         dbg("  FirmwareMajorVersion  %d.%d.%d",
 456                         product_info->FirmwareMajorVersion,
 457                         product_info->FirmwareMinorVersion,
 458                         le16_to_cpu(product_info->FirmwareBuildNumber));
 459         dbg("  ManufactureDescDate   %d/%d/%d",
 460                         product_info->ManufactureDescDate[0],
 461                         product_info->ManufactureDescDate[1],
 462                         product_info->ManufactureDescDate[2]+1900);
 463         dbg("  iDownloadFile         0x%x", product_info->iDownloadFile);
 464         dbg("  EpicVer               %d", product_info->EpicVer);
 465 }
 466
 467 static void get_product_info(struct edgeport_serial *edge_serial)
 468 {
 469         struct edgeport_product_info *product_info = &edge_serial->product_info;
 470
 471         memset(product_info, 0, sizeof(struct edgeport_product_info));
 472
 473         product_info->ProductId = (__u16)(le16_to_cpu(edge_serial->serial->dev->descriptor.idProduct) & ~ION_DEVICE_ID_80251_NETCHIP);
 474         product_info->NumPorts = edge_serial->manuf_descriptor.NumPorts;
 475         product_info->ProdInfoVer = 0;
 476
 477         product_info->RomSize = edge_serial->manuf_descriptor.RomSize;
 478         product_info->RamSize = edge_serial->manuf_descriptor.RamSize;
 479         product_info->CpuRev = edge_serial->manuf_descriptor.CpuRev;
 480         product_info->BoardRev = edge_serial->manuf_descriptor.BoardRev;
 481
 482         product_info->BootMajorVersion =
 483                                 edge_serial->boot_descriptor.MajorVersion;
 484         product_info->BootMinorVersion =
 485                                 edge_serial->boot_descriptor.MinorVersion;
 486         product_info->BootBuildNumber =
 487                                 edge_serial->boot_descriptor.BuildNumber;
 488
 489         memcpy(product_info->ManufactureDescDate,
 490                         edge_serial->manuf_descriptor.DescDate,
 491                         sizeof(edge_serial->manuf_descriptor.DescDate));
 492
 493         /* check if this is 2nd generation hardware */
 494         if (le16_to_cpu(edge_serial->serial->dev->descriptor.idProduct)
 495                                             & ION_DEVICE_ID_80251_NETCHIP)
 496                 product_info->iDownloadFile = EDGE_DOWNLOAD_FILE_80251;
 497         else
 498                 product_info->iDownloadFile = EDGE_DOWNLOAD_FILE_I930;
 499
 500         /* Determine Product type and set appropriate flags */
 501         switch (DEVICE_ID_FROM_USB_PRODUCT_ID(product_info->ProductId)) {
 502         case ION_DEVICE_ID_EDGEPORT_COMPATIBLE:
 503         case ION_DEVICE_ID_EDGEPORT_4T:
 504         case ION_DEVICE_ID_EDGEPORT_4:
 505         case ION_DEVICE_ID_EDGEPORT_2:
 506         case ION_DEVICE_ID_EDGEPORT_8_DUAL_CPU:
 507         case ION_DEVICE_ID_EDGEPORT_8:
 508         case ION_DEVICE_ID_EDGEPORT_421:
 509         case ION_DEVICE_ID_EDGEPORT_21:
 510         case ION_DEVICE_ID_EDGEPORT_2_DIN:
 511         case ION_DEVICE_ID_EDGEPORT_4_DIN:
 512         case ION_DEVICE_ID_EDGEPORT_16_DUAL_CPU:
 513                 product_info->IsRS232 = 1;
 514                 break;
 515
 516         case ION_DEVICE_ID_EDGEPORT_2I: /* Edgeport/2 RS422/RS485 */
 517                 product_info->IsRS422 = 1;
 518                 product_info->IsRS485 = 1;
 519                 break;
 520
 521         case ION_DEVICE_ID_EDGEPORT_8I: /* Edgeport/4 RS422 */
 522         case ION_DEVICE_ID_EDGEPORT_4I: /* Edgeport/4 RS422 */
 523                 product_info->IsRS422 = 1;
 524                 break;
 525         }
 526
 527         dump_product_info(product_info);
 528 }
 529
 530 static int get_epic_descriptor(struct edgeport_serial *ep)
 531 {
 532         int result;
 533         struct usb_serial *serial = ep->serial;
 534         struct edgeport_product_info *product_info = &ep->product_info;
 535         struct edge_compatibility_descriptor *epic = &ep->epic_descriptor;
 536         struct edge_compatibility_bits *bits;
 537
 538         ep->is_epic = 0;
 539         result = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
 540                                  USB_REQUEST_ION_GET_EPIC_DESC,
 541                                  0xC0, 0x00, 0x00,
 542                                  &ep->epic_descriptor,
 543                                  sizeof(struct edge_compatibility_descriptor),
 544                                  300);
 545
 546         dbg("%s result = %d", __func__, result);
 547
 548         if (result > 0) {
 549                 ep->is_epic = 1;
 550                 memset(product_info, 0, sizeof(struct edgeport_product_info));
 551
 552                 product_info->NumPorts = epic->NumPorts;
 553                 product_info->ProdInfoVer = 0;
 554                 product_info->FirmwareMajorVersion = epic->MajorVersion;
 555                 product_info->FirmwareMinorVersion = epic->MinorVersion;
 556                 product_info->FirmwareBuildNumber = epic->BuildNumber;
 557                 product_info->iDownloadFile = epic->iDownloadFile;
 558                 product_info->EpicVer = epic->EpicVer;
 559                 product_info->Epic = epic->Supports;
 560                 product_info->ProductId = ION_DEVICE_ID_EDGEPORT_COMPATIBLE;
 561                 dump_product_info(product_info);
 562
 563                 bits = &ep->epic_descriptor.Supports;
 564                 dbg("**EPIC descriptor:");
 565                 dbg("  VendEnableSuspend: %s", bits->VendEnableSuspend  ? "TRUE": "FALSE");
 566                 dbg("  IOSPOpen         : %s", bits->IOSPOpen           ? "TRUE": "FALSE");
 567                 dbg("  IOSPClose        : %s", bits->IOSPClose          ? "TRUE": "FALSE");
 568                 dbg("  IOSPChase        : %s", bits->IOSPChase          ? "TRUE": "FALSE");
 569                 dbg("  IOSPSetRxFlow    : %s", bits->IOSPSetRxFlow      ? "TRUE": "FALSE");
 570                 dbg("  IOSPSetTxFlow    : %s", bits->IOSPSetTxFlow      ? "TRUE": "FALSE");
 571                 dbg("  IOSPSetXChar     : %s", bits->IOSPSetXChar       ? "TRUE": "FALSE");
 572                 dbg("  IOSPRxCheck      : %s", bits->IOSPRxCheck        ? "TRUE": "FALSE");
 573                 dbg("  IOSPSetClrBreak  : %s", bits->IOSPSetClrBreak    ? "TRUE": "FALSE");
 574                 dbg("  IOSPWriteMCR     : %s", bits->IOSPWriteMCR       ? "TRUE": "FALSE");
 575                 dbg("  IOSPWriteLCR     : %s", bits->IOSPWriteLCR       ? "TRUE": "FALSE");
 576                 dbg("  IOSPSetBaudRate  : %s", bits->IOSPSetBaudRate    ? "TRUE": "FALSE");
 577                 dbg("  TrueEdgeport     : %s", bits->TrueEdgeport       ? "TRUE": "FALSE");
 578         }
 579
 580         return result;
 581 }
 582
 583
 584 /************************************************************************/
 585 /************************************************************************/
 586 /*            U S B  C A L L B A C K   F U N C T I O N S                */
 587 /*            U S B  C A L L B A C K   F U N C T I O N S                */
 588 /************************************************************************/
 589 /************************************************************************/
 590
 591 /*****************************************************************************
 592  * edge_interrupt_callback
 593  *      this is the callback function for when we have received data on the
 594  *      interrupt endpoint.
 595  *****************************************************************************/
 596 static void edge_interrupt_callback(struct urb *urb)
 597 {
 598         struct edgeport_serial  *edge_serial = urb->context;
 599         struct edgeport_port *edge_port;
 600         struct usb_serial_port *port;
 601         struct tty_struct *tty;
 602         unsigned char *data = urb->transfer_buffer;
 603         int length = urb->actual_length;
 604         int bytes_avail;
 605         int position;
 606         int txCredits;
 607         int portNumber;
 608         int result;
 609         int status = urb->status;
 610
 611         dbg("%s", __func__);
 612
 613         switch (status) {
 614         case 0:
 615                 /* success */
 616                 break;
 617         case -ECONNRESET:
 618         case -ENOENT:
 619         case -ESHUTDOWN:
 620                 /* this urb is terminated, clean up */
 621                 dbg("%s - urb shutting down with status: %d",
 622                                                 __func__, status);
 623                 return;
 624         default:
 625                 dbg("%s - nonzero urb status received: %d", __func__, status);
 626                 goto exit;
 627         }
 628
 629         /* process this interrupt-read even if there are no ports open */
 630         if (length) {
 631                 usb_serial_debug_data(debug, &edge_serial->serial->dev->dev,
 632                                                 __func__, length, data);
 633
 634                 if (length > 1) {
 635                         bytes_avail = data[0] | (data[1] << 8);
 636                         if (bytes_avail) {
 637                                 spin_lock(&edge_serial->es_lock);
 638                                 edge_serial->rxBytesAvail += bytes_avail;
 639                                 dbg("%s - bytes_avail=%d, rxBytesAvail=%d, read_in_progress=%d", __func__, bytes_avail, edge_serial->rxBytesAvail, edge_serial->read_in_progress);
 640
 641                                 if (edge_serial->rxBytesAvail > 0 &&
 642                                     !edge_serial->read_in_progress) {
 643                                         dbg("%s - posting a read", __func__);
 644                                         edge_serial->read_in_progress = true;
 645
 646                                         /* we have pending bytes on the
 647                                            bulk in pipe, send a request */
 648                                         edge_serial->read_urb->dev = edge_serial->serial->dev;
 649                                         result = usb_submit_urb(edge_serial->read_urb, GFP_ATOMIC);
 650                                         if (result) {
 651                                                 dev_err(&edge_serial->serial->dev->dev, "%s - usb_submit_urb(read bulk) failed with result = %d\n", __func__, result);
 652                                                 edge_serial->read_in_progress = false;
 653                                         }
 654                                 }
 655                                 spin_unlock(&edge_serial->es_lock);
 656                         }
 657                 }
 658                 /* grab the txcredits for the ports if available */
 659                 position = 2;
 660                 portNumber = 0;
 661                 while ((position < length) &&
 662                                 (portNumber < edge_serial->serial->num_ports)) {
 663                         txCredits = data[position] | (data[position+1] << 8);
 664                         if (txCredits) {
 665                                 port = edge_serial->serial->port[portNumber];
 666                                 edge_port = usb_get_serial_port_data(port);
 667                                 if (edge_port->open) {
 668                                         spin_lock(&edge_port->ep_lock);
 669                                         edge_port->txCredits += txCredits;
 670                                         spin_unlock(&edge_port->ep_lock);
 671                                         dbg("%s - txcredits for port%d = %d",
 672                                                         __func__, portNumber,
 673                                                         edge_port->txCredits);
 674
 675                                         /* tell the tty driver that something
 676                                            has changed */
 677                                         tty = tty_port_tty_get(
 678                                                 &edge_port->port->port);
 679                                         if (tty) {
 680                                                 tty_wakeup(tty);
 681                                                 tty_kref_put(tty);
 682                                         }
 683                                         /* Since we have more credit, check
 684                                            if more data can be sent */
 685                                         send_more_port_data(edge_serial,
 686                                                                 edge_port);
 687                                 }
 688                         }
 689                         position += 2;
 690                         ++portNumber;
 691                 }
 692         }
 693
 694 exit:
 695         result = usb_submit_urb(urb, GFP_ATOMIC);
 696         if (result)
 697                 dev_err(&urb->dev->dev,
 698                         "%s - Error %d submitting control urb\n",
 699                                                 __func__, result);
 700 }
 701
 702
 703 /*****************************************************************************
 704  * edge_bulk_in_callback
 705  *      this is the callback function for when we have received data on the
 706  *      bulk in endpoint.
 707  *****************************************************************************/
 708 static void edge_bulk_in_callback(struct urb *urb)
 709 {
 710         struct edgeport_serial  *edge_serial = urb->context;
 711         unsigned char           *data = urb->transfer_buffer;
 712         int                     retval;
 713         __u16                   raw_data_length;
 714         int status = urb->status;
 715
 716         dbg("%s", __func__);
 717
 718         if (status) {
 719                 dbg("%s - nonzero read bulk status received: %d",
 720                     __func__, status);
 721                 edge_serial->read_in_progress = false;
 722                 return;
 723         }
 724
 725         if (urb->actual_length == 0) {
 726                 dbg("%s - read bulk callback with no data", __func__);
 727                 edge_serial->read_in_progress = false;
 728                 return;
 729         }
 730
 731         raw_data_length = urb->actual_length;
 732
 733         usb_serial_debug_data(debug, &edge_serial->serial->dev->dev,
 734                                         __func__, raw_data_length, data);
 735
 736         spin_lock(&edge_serial->es_lock);
 737
 738         /* decrement our rxBytes available by the number that we just got */
 739         edge_serial->rxBytesAvail -= raw_data_length;
 740
 741         dbg("%s - Received = %d, rxBytesAvail %d", __func__,
 742                                 raw_data_length, edge_serial->rxBytesAvail);
 743
 744         process_rcvd_data(edge_serial, data, urb->actual_length);
 745
 746         /* check to see if there's any more data for us to read */
 747         if (edge_serial->rxBytesAvail > 0) {
 748                 dbg("%s - posting a read", __func__);
 749                 edge_serial->read_urb->dev = edge_serial->serial->dev;
 750                 retval = usb_submit_urb(edge_serial->read_urb, GFP_ATOMIC);
 751                 if (retval) {
 752                         dev_err(&urb->dev->dev,
 753                                 "%s - usb_submit_urb(read bulk) failed, "
 754                                 "retval = %d\n", __func__, retval);
 755                         edge_serial->read_in_progress = false;
 756                 }
 757         } else {
 758                 edge_serial->read_in_progress = false;
 759         }
 760
 761         spin_unlock(&edge_serial->es_lock);
 762 }
 763
 764
 765 /*****************************************************************************
 766  * edge_bulk_out_data_callback
 767  *      this is the callback function for when we have finished sending
 768  *      serial data on the bulk out endpoint.
 769  *****************************************************************************/
 770 static void edge_bulk_out_data_callback(struct urb *urb)
 771 {
 772         struct edgeport_port *edge_port = urb->context;
 773         struct tty_struct *tty;
 774         int status = urb->status;
 775
 776         dbg("%s", __func__);
 777
 778         if (status) {
 779                 dbg("%s - nonzero write bulk status received: %d",
 780                     __func__, status);
 781         }
 782
 783         tty = tty_port_tty_get(&edge_port->port->port);
 784
 785         if (tty && edge_port->open) {
 786                 /* let the tty driver wakeup if it has a special
 787                    write_wakeup function */
 788                 tty_wakeup(tty);
 789         }
 790         tty_kref_put(tty);
 791
 792         /* Release the Write URB */
 793         edge_port->write_in_progress = false;
 794
 795         /* Check if more data needs to be sent */
 796         send_more_port_data((struct edgeport_serial *)
 797                 (usb_get_serial_data(edge_port->port->serial)), edge_port);
 798 }
 799
 800
 801 /*****************************************************************************
 802  * BulkOutCmdCallback
 803  *      this is the callback function for when we have finished sending a
 804  *      command on the bulk out endpoint.
 805  *****************************************************************************/
 806 static void edge_bulk_out_cmd_callback(struct urb *urb)
 807 {
 808         struct edgeport_port *edge_port = urb->context;
 809         struct tty_struct *tty;
 810         int status = urb->status;
 811
 812         dbg("%s", __func__);
 813
 814         atomic_dec(&CmdUrbs);
 815         dbg("%s - FREE URB %p (outstanding %d)", __func__,
 816                                         urb, atomic_read(&CmdUrbs));
 817
 818
 819         /* clean up the transfer buffer */
 820         kfree(urb->transfer_buffer);
 821
 822         /* Free the command urb */
 823         usb_free_urb(urb);
 824
 825         if (status) {
 826                 dbg("%s - nonzero write bulk status received: %d",
 827                                                         __func__, status);
 828                 return;
 829         }
 830
 831         /* Get pointer to tty */
 832         tty = tty_port_tty_get(&edge_port->port->port);
 833
 834         /* tell the tty driver that something has changed */
 835         if (tty && edge_port->open)
 836                 tty_wakeup(tty);
 837         tty_kref_put(tty);
 838
 839         /* we have completed the command */
 840         edge_port->commandPending = false;
 841         wake_up(&edge_port->wait_command);
 842 }
 843
 844
 845 /*****************************************************************************
 846  * Driver tty interface functions
 847  *****************************************************************************/
 848
 849 /*****************************************************************************
 850  * SerialOpen
 851  *      this function is called by the tty driver when a port is opened
 852  *      If successful, we return 0
 853  *      Otherwise we return a negative error number.
 854  *****************************************************************************/
 855 static int edge_open(struct tty_struct *tty,
 856                         struct usb_serial_port *port, struct file *filp)
 857 {
 858         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
 859         struct usb_serial *serial;
 860         struct edgeport_serial *edge_serial;
 861         int response;
 862
 863         dbg("%s - port %d", __func__, port->number);
 864
 865         if (edge_port == NULL)
 866                 return -ENODEV;
 867
 868         /* see if we've set up our endpoint info yet (can't set it up
 869            in edge_startup as the structures were not set up at that time.) */
 870         serial = port->serial;
 871         edge_serial = usb_get_serial_data(serial);
 872         if (edge_serial == NULL)
 873                 return -ENODEV;
 874         if (edge_serial->interrupt_in_buffer == NULL) {
 875                 struct usb_serial_port *port0 = serial->port[0];
 876
 877                 /* not set up yet, so do it now */
 878                 edge_serial->interrupt_in_buffer =
 879                                         port0->interrupt_in_buffer;
 880                 edge_serial->interrupt_in_endpoint =
 881                                         port0->interrupt_in_endpointAddress;
 882                 edge_serial->interrupt_read_urb = port0->interrupt_in_urb;
 883                 edge_serial->bulk_in_buffer = port0->bulk_in_buffer;
 884                 edge_serial->bulk_in_endpoint =
 885                                         port0->bulk_in_endpointAddress;
 886                 edge_serial->read_urb = port0->read_urb;
 887                 edge_serial->bulk_out_endpoint =
 888                                         port0->bulk_out_endpointAddress;
 889
 890                 /* set up our interrupt urb */
 891                 usb_fill_int_urb(edge_serial->interrupt_read_urb,
 892                       serial->dev,
 893                       usb_rcvintpipe(serial->dev,
 894                                 port0->interrupt_in_endpointAddress),
 895                       port0->interrupt_in_buffer,
 896                       edge_serial->interrupt_read_urb->transfer_buffer_length,
 897                       edge_interrupt_callback, edge_serial,
 898                       edge_serial->interrupt_read_urb->interval);
 899
 900                 /* set up our bulk in urb */
 901                 usb_fill_bulk_urb(edge_serial->read_urb, serial->dev,
 902                         usb_rcvbulkpipe(serial->dev,
 903                                 port0->bulk_in_endpointAddress),
 904                         port0->bulk_in_buffer,
 905                         edge_serial->read_urb->transfer_buffer_length,
 906                         edge_bulk_in_callback, edge_serial);
 907                 edge_serial->read_in_progress = false;
 908
 909                 /* start interrupt read for this edgeport
 910                  * this interrupt will continue as long
 911                  * as the edgeport is connected */
 912                 response = usb_submit_urb(edge_serial->interrupt_read_urb,
 913                                                                 GFP_KERNEL);
 914                 if (response) {
 915                         dev_err(&port->dev,
 916                                 "%s - Error %d submitting control urb\n",
 917                                                         __func__, response);
 918                 }
 919         }
 920
 921         /* initialize our wait queues */
 922         init_waitqueue_head(&edge_port->wait_open);
 923         init_waitqueue_head(&edge_port->wait_chase);
 924         init_waitqueue_head(&edge_port->delta_msr_wait);
 925         init_waitqueue_head(&edge_port->wait_command);
 926
 927         /* initialize our icount structure */
 928         memset(&(edge_port->icount), 0x00, sizeof(edge_port->icount));
 929
 930         /* initialize our port settings */
 931         edge_port->txCredits = 0;       /* Can't send any data yet */
 932         /* Must always set this bit to enable ints! */
 933         edge_port->shadowMCR = MCR_MASTER_IE;
 934         edge_port->chaseResponsePending = false;
 935
 936         /* send a open port command */
 937         edge_port->openPending = true;
 938         edge_port->open        = false;
 939         response = send_iosp_ext_cmd(edge_port, IOSP_CMD_OPEN_PORT, 0);
 940
 941         if (response < 0) {
 942                 dev_err(&port->dev, "%s - error sending open port command\n",
 943                                                                 __func__);
 944                 edge_port->openPending = false;
 945                 return -ENODEV;
 946         }
 947
 948         /* now wait for the port to be completely opened */
 949         wait_event_timeout(edge_port->wait_open, !edge_port->openPending,
 950                                                                 OPEN_TIMEOUT);
 951
 952         if (!edge_port->open) {
 953                 /* open timed out */
 954                 dbg("%s - open timedout", __func__);
 955                 edge_port->openPending = false;
 956                 return -ENODEV;
 957         }
 958
 959         /* create the txfifo */
 960         edge_port->txfifo.head  = 0;
 961         edge_port->txfifo.tail  = 0;
 962         edge_port->txfifo.count = 0;
 963         edge_port->txfifo.size  = edge_port->maxTxCredits;
 964         edge_port->txfifo.fifo  = kmalloc(edge_port->maxTxCredits, GFP_KERNEL);
 965
 966         if (!edge_port->txfifo.fifo) {
 967                 dbg("%s - no memory", __func__);
 968                 edge_close(tty, port, filp);
 969                 return -ENOMEM;
 970         }
 971
 972         /* Allocate a URB for the write */
 973         edge_port->write_urb = usb_alloc_urb(0, GFP_KERNEL);
 974         edge_port->write_in_progress = false;
 975
 976         if (!edge_port->write_urb) {
 977                 dbg("%s - no memory", __func__);
 978                 edge_close(tty, port, filp);
 979                 return -ENOMEM;
 980         }
 981
 982         dbg("%s(%d) - Initialize TX fifo to %d bytes",
 983                         __func__, port->number, edge_port->maxTxCredits);
 984
 985         dbg("%s exited", __func__);
 986
 987         return 0;
 988 }
 989
 990
 991 /************************************************************************
 992  *
 993  * block_until_chase_response
 994  *
 995  *      This function will block the close until one of the following:
 996  *              1. Response to our Chase comes from Edgeport
 997  *              2. A timeout of 10 seconds without activity has expired
 998  *                 (1K of Edgeport data @ 2400 baud ==> 4 sec to empty)
 999  *
1000  ************************************************************************/
1001 static void block_until_chase_response(struct edgeport_port *edge_port)
1002 {
1003         DEFINE_WAIT(wait);
1004         __u16 lastCredits;
1005         int timeout = 1*HZ;
1006         int loop = 10;
1007
1008         while (1) {
1009                 /* Save Last credits */
1010                 lastCredits = edge_port->txCredits;
1011
1012                 /* Did we get our Chase response */
1013                 if (!edge_port->chaseResponsePending) {
1014                         dbg("%s - Got Chase Response", __func__);
1015
1016                         /* did we get all of our credit back? */
1017                         if (edge_port->txCredits == edge_port->maxTxCredits) {
1018                                 dbg("%s - Got all credits", __func__);
1019                                 return;
1020                         }
1021                 }
1022
1023                 /* Block the thread for a while */
1024                 prepare_to_wait(&edge_port->wait_chase, &wait,
1025                                                 TASK_UNINTERRUPTIBLE);
1026                 schedule_timeout(timeout);
1027                 finish_wait(&edge_port->wait_chase, &wait);
1028
1029                 if (lastCredits == edge_port->txCredits) {
1030                         /* No activity.. count down. */
1031                         loop--;
1032                         if (loop == 0) {
1033                                 edge_port->chaseResponsePending = false;
1034                                 dbg("%s - Chase TIMEOUT", __func__);
1035                                 return;
1036                         }
1037                 } else {
1038                         /* Reset timeout value back to 10 seconds */
1039                         dbg("%s - Last %d, Current %d", __func__,
1040                                         lastCredits, edge_port->txCredits);
1041                         loop = 10;
1042                 }
1043         }
1044 }
1045
1046
1047 /************************************************************************
1048  *
1049  * block_until_tx_empty
1050  *
1051  *      This function will block the close until one of the following:
1052  *              1. TX count are 0
1053  *              2. The edgeport has stopped
1054  *              3. A timeout of 3 seconds without activity has expired
1055  *
1056  ************************************************************************/
1057 static void block_until_tx_empty(struct edgeport_port *edge_port)
1058 {
1059         DEFINE_WAIT(wait);
1060         struct TxFifo *fifo = &edge_port->txfifo;
1061         __u32 lastCount;
1062         int timeout = HZ/10;
1063         int loop = 30;
1064
1065         while (1) {
1066                 /* Save Last count */
1067                 lastCount = fifo->count;
1068
1069                 /* Is the Edgeport Buffer empty? */
1070                 if (lastCount == 0) {
1071                         dbg("%s - TX Buffer Empty", __func__);
1072                         return;
1073                 }
1074
1075                 /* Block the thread for a while */
1076                 prepare_to_wait(&edge_port->wait_chase, &wait,
1077                                                 TASK_UNINTERRUPTIBLE);
1078                 schedule_timeout(timeout);
1079                 finish_wait(&edge_port->wait_chase, &wait);
1080
1081                 dbg("%s wait", __func__);
1082
1083                 if (lastCount == fifo->count) {
1084                         /* No activity.. count down. */
1085                         loop--;
1086                         if (loop == 0) {
1087                                 dbg("%s - TIMEOUT", __func__);
1088                                 return;
1089                         }
1090                 } else {
1091                         /* Reset timeout value back to seconds */
1092                         loop = 30;
1093                 }
1094         }
1095 }
1096
1097
1098 /*****************************************************************************
1099  * edge_close
1100  *      this function is called by the tty driver when a port is closed
1101  *****************************************************************************/
1102 static void edge_close(struct tty_struct *tty,
1103                         struct usb_serial_port *port, struct file *filp)
1104 {
1105         struct edgeport_serial *edge_serial;
1106         struct edgeport_port *edge_port;
1107         int status;
1108
1109         dbg("%s - port %d", __func__, port->number);
1110
1111         edge_serial = usb_get_serial_data(port->serial);
1112         edge_port = usb_get_serial_port_data(port);
1113         if (edge_serial == NULL || edge_port == NULL)
1114                 return;
1115
1116         /* block until tx is empty */
1117         block_until_tx_empty(edge_port);
1118
1119         edge_port->closePending = true;
1120
1121         if ((!edge_serial->is_epic) ||
1122             ((edge_serial->is_epic) &&
1123              (edge_serial->epic_descriptor.Supports.IOSPChase))) {
1124                 /* flush and chase */
1125                 edge_port->chaseResponsePending = true;
1126
1127                 dbg("%s - Sending IOSP_CMD_CHASE_PORT", __func__);
1128                 status = send_iosp_ext_cmd(edge_port, IOSP_CMD_CHASE_PORT, 0);
1129                 if (status == 0)
1130                         /* block until chase finished */
1131                         block_until_chase_response(edge_port);
1132                 else
1133                         edge_port->chaseResponsePending = false;
1134         }
1135
1136         if ((!edge_serial->is_epic) ||
1137             ((edge_serial->is_epic) &&
1138              (edge_serial->epic_descriptor.Supports.IOSPClose))) {
1139                /* close the port */
1140                 dbg("%s - Sending IOSP_CMD_CLOSE_PORT", __func__);
1141                 send_iosp_ext_cmd(edge_port, IOSP_CMD_CLOSE_PORT, 0);
1142         }
1143
1144         /* port->close = true; */
1145         edge_port->closePending = false;
1146         edge_port->open = false;
1147         edge_port->openPending = false;
1148
1149         usb_kill_urb(edge_port->write_urb);
1150
1151         if (edge_port->write_urb) {
1152                 /* if this urb had a transfer buffer already
1153                                 (old transfer) free it */
1154                 kfree(edge_port->write_urb->transfer_buffer);
1155                 usb_free_urb(edge_port->write_urb);
1156                 edge_port->write_urb = NULL;
1157         }
1158         kfree(edge_port->txfifo.fifo);
1159         edge_port->txfifo.fifo = NULL;
1160
1161         dbg("%s exited", __func__);
1162 }
1163
1164 /*****************************************************************************
1165  * SerialWrite
1166  *      this function is called by the tty driver when data should be written
1167  *      to the port.
1168  *      If successful, we return the number of bytes written, otherwise we
1169  *      return a negative error number.
1170  *****************************************************************************/
1171 static int edge_write(struct tty_struct *tty, struct usb_serial_port *port,
1172                                         const unsigned char *data, int count)
1173 {
1174         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1175         struct TxFifo *fifo;
1176         int copySize;
1177         int bytesleft;
1178         int firsthalf;
1179         int secondhalf;
1180         unsigned long flags;
1181
1182         dbg("%s - port %d", __func__, port->number);
1183
1184         if (edge_port == NULL)
1185                 return -ENODEV;
1186
1187         /* get a pointer to the Tx fifo */
1188         fifo = &edge_port->txfifo;
1189
1190         spin_lock_irqsave(&edge_port->ep_lock, flags);
1191
1192         /* calculate number of bytes to put in fifo */
1193         copySize = min((unsigned int)count,
1194                                 (edge_port->txCredits - fifo->count));
1195
1196         dbg("%s(%d) of %d byte(s) Fifo room  %d -- will copy %d bytes",
1197                         __func__, port->number, count,
1198                         edge_port->txCredits - fifo->count, copySize);
1199
1200         /* catch writes of 0 bytes which the tty driver likes to give us,
1201            and when txCredits is empty */
1202         if (copySize == 0) {
1203                 dbg("%s - copySize = Zero", __func__);
1204                 goto finish_write;
1205         }
1206
1207         /* queue the data
1208          * since we can never overflow the buffer we do not have to check for a
1209          * full condition
1210          *
1211          * the copy is done is two parts -- first fill to the end of the buffer
1212          * then copy the reset from the start of the buffer
1213          */
1214         bytesleft = fifo->size - fifo->head;
1215         firsthalf = min(bytesleft, copySize);
1216         dbg("%s - copy %d bytes of %d into fifo ", __func__,
1217                                         firsthalf, bytesleft);
1218
1219         /* now copy our data */
1220         memcpy(&fifo->fifo[fifo->head], data, firsthalf);
1221         usb_serial_debug_data(debug, &port->dev, __func__,
1222                                         firsthalf, &fifo->fifo[fifo->head]);
1223
1224         /* update the index and size */
1225         fifo->head  += firsthalf;
1226         fifo->count += firsthalf;
1227
1228         /* wrap the index */
1229         if (fifo->head == fifo->size)
1230                 fifo->head = 0;
1231
1232         secondhalf = copySize-firsthalf;
1233
1234         if (secondhalf) {
1235                 dbg("%s - copy rest of data %d", __func__, secondhalf);
1236                 memcpy(&fifo->fifo[fifo->head], &data[firsthalf], secondhalf);
1237                 usb_serial_debug_data(debug, &port->dev, __func__,
1238                                         secondhalf, &fifo->fifo[fifo->head]);
1239                 /* update the index and size */
1240                 fifo->count += secondhalf;
1241                 fifo->head  += secondhalf;
1242                 /* No need to check for wrap since we can not get to end of
1243                  * the fifo in this part
1244                  */
1245         }
1246
1247 finish_write:
1248         spin_unlock_irqrestore(&edge_port->ep_lock, flags);
1249
1250         send_more_port_data((struct edgeport_serial *)
1251                         usb_get_serial_data(port->serial), edge_port);
1252
1253         dbg("%s wrote %d byte(s) TxCredits %d, Fifo %d", __func__,
1254                                 copySize, edge_port->txCredits, fifo->count);
1255
1256         return copySize;
1257 }
1258
1259
1260 /************************************************************************
1261  *
1262  * send_more_port_data()
1263  *
1264  *      This routine attempts to write additional UART transmit data
1265  *      to a port over the USB bulk pipe. It is called (1) when new
1266  *      data has been written to a port's TxBuffer from higher layers
1267  *      (2) when the peripheral sends us additional TxCredits indicating
1268  *      that it can accept more Tx data for a given port; and (3) when
1269  *      a bulk write completes successfully and we want to see if we
1270  *      can transmit more.
1271  *
1272  ************************************************************************/
1273 static void send_more_port_data(struct edgeport_serial *edge_serial,
1274                                         struct edgeport_port *edge_port)
1275 {
1276         struct TxFifo   *fifo = &edge_port->txfifo;
1277         struct urb      *urb;
1278         unsigned char   *buffer;
1279         int             status;
1280         int             count;
1281         int             bytesleft;
1282         int             firsthalf;
1283         int             secondhalf;
1284         unsigned long   flags;
1285
1286         dbg("%s(%d)", __func__, edge_port->port->number);
1287
1288         spin_lock_irqsave(&edge_port->ep_lock, flags);
1289
1290         if (edge_port->write_in_progress ||
1291             !edge_port->open             ||
1292             (fifo->count == 0)) {
1293                 dbg("%s(%d) EXIT - fifo %d, PendingWrite = %d",
1294                                 __func__, edge_port->port->number,
1295                                 fifo->count, edge_port->write_in_progress);
1296                 goto exit_send;
1297         }
1298
1299         /* since the amount of data in the fifo will always fit into the
1300          * edgeport buffer we do not need to check the write length
1301          *
1302          * Do we have enough credits for this port to make it worthwhile
1303          * to bother queueing a write. If it's too small, say a few bytes,
1304          * it's better to wait for more credits so we can do a larger write.
1305          */
1306         if (edge_port->txCredits < EDGE_FW_GET_TX_CREDITS_SEND_THRESHOLD(edge_port->maxTxCredits, EDGE_FW_BULK_MAX_PACKET_SIZE)) {
1307                 dbg("%s(%d) Not enough credit - fifo %d TxCredit %d",
1308                         __func__, edge_port->port->number, fifo->count,
1309                         edge_port->txCredits);
1310                 goto exit_send;
1311         }
1312
1313         /* lock this write */
1314         edge_port->write_in_progress = true;
1315
1316         /* get a pointer to the write_urb */
1317         urb = edge_port->write_urb;
1318
1319         /* make sure transfer buffer is freed */
1320         kfree(urb->transfer_buffer);
1321         urb->transfer_buffer = NULL;
1322
1323         /* build the data header for the buffer and port that we are about
1324            to send out */
1325         count = fifo->count;
1326         buffer = kmalloc(count+2, GFP_ATOMIC);
1327         if (buffer == NULL) {
1328                 dev_err(&edge_port->port->dev,
1329                                 "%s - no more kernel memory...\n", __func__);
1330                 edge_port->write_in_progress = false;
1331                 goto exit_send;
1332         }
1333         buffer[0] = IOSP_BUILD_DATA_HDR1(edge_port->port->number
1334                                 - edge_port->port->serial->minor, count);
1335         buffer[1] = IOSP_BUILD_DATA_HDR2(edge_port->port->number
1336                                 - edge_port->port->serial->minor, count);
1337
1338         /* now copy our data */
1339         bytesleft =  fifo->size - fifo->tail;
1340         firsthalf = min(bytesleft, count);
1341         memcpy(&buffer[2], &fifo->fifo[fifo->tail], firsthalf);
1342         fifo->tail  += firsthalf;
1343         fifo->count -= firsthalf;
1344         if (fifo->tail == fifo->size)
1345                 fifo->tail = 0;
1346
1347         secondhalf = count-firsthalf;
1348         if (secondhalf) {
1349                 memcpy(&buffer[2+firsthalf], &fifo->fifo[fifo->tail],
1350                                                                 secondhalf);
1351                 fifo->tail  += secondhalf;
1352                 fifo->count -= secondhalf;
1353         }
1354
1355         if (count)
1356                 usb_serial_debug_data(debug, &edge_port->port->dev,
1357                                                 __func__, count, &buffer[2]);
1358
1359         /* fill up the urb with all of our data and submit it */
1360         usb_fill_bulk_urb(urb, edge_serial->serial->dev,
1361                         usb_sndbulkpipe(edge_serial->serial->dev,
1362                                         edge_serial->bulk_out_endpoint),
1363                         buffer, count+2,
1364                         edge_bulk_out_data_callback, edge_port);
1365
1366         /* decrement the number of credits we have by the number we just sent */
1367         edge_port->txCredits -= count;
1368         edge_port->icount.tx += count;
1369
1370         urb->dev = edge_serial->serial->dev;
1371         status = usb_submit_urb(urb, GFP_ATOMIC);
1372         if (status) {
1373                 /* something went wrong */
1374                 dev_err(&edge_port->port->dev,
1375                         "%s - usb_submit_urb(write bulk) failed, status = %d, data lost\n",
1376                                 __func__, status);
1377                 edge_port->write_in_progress = false;
1378
1379                 /* revert the credits as something bad happened. */
1380                 edge_port->txCredits += count;
1381                 edge_port->icount.tx -= count;
1382         }
1383         dbg("%s wrote %d byte(s) TxCredit %d, Fifo %d",
1384                         __func__, count, edge_port->txCredits, fifo->count);
1385
1386 exit_send:
1387         spin_unlock_irqrestore(&edge_port->ep_lock, flags);
1388 }
1389
1390
1391 /*****************************************************************************
1392  * edge_write_room
1393  *      this function is called by the tty driver when it wants to know how
1394  *      many bytes of data we can accept for a specific port. If successful,
1395  *      we return the amount of room that we have for this port (the txCredits)
1396  *      otherwise we return a negative error number.
1397  *****************************************************************************/
1398 static int edge_write_room(struct tty_struct *tty)
1399 {
1400         struct usb_serial_port *port = tty->driver_data;
1401         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1402         int room;
1403         unsigned long flags;
1404
1405         dbg("%s", __func__);
1406
1407         if (edge_port == NULL)
1408                 return 0;
1409         if (edge_port->closePending)
1410                 return 0;
1411
1412         dbg("%s - port %d", __func__, port->number);
1413
1414         if (!edge_port->open) {
1415                 dbg("%s - port not opened", __func__);
1416                 return 0;
1417         }
1418
1419         /* total of both buffers is still txCredit */
1420         spin_lock_irqsave(&edge_port->ep_lock, flags);
1421         room = edge_port->txCredits - edge_port->txfifo.count;
1422         spin_unlock_irqrestore(&edge_port->ep_lock, flags);
1423
1424         dbg("%s - returns %d", __func__, room);
1425         return room;
1426 }
1427
1428
1429 /*****************************************************************************
1430  * edge_chars_in_buffer
1431  *      this function is called by the tty driver when it wants to know how
1432  *      many bytes of data we currently have outstanding in the port (data that
1433  *      has been written, but hasn't made it out the port yet)
1434  *      If successful, we return the number of bytes left to be written in the
1435  *      system,
1436  *      Otherwise we return a negative error number.
1437  *****************************************************************************/
1438 static int edge_chars_in_buffer(struct tty_struct *tty)
1439 {
1440         struct usb_serial_port *port = tty->driver_data;
1441         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1442         int num_chars;
1443         unsigned long flags;
1444
1445         dbg("%s", __func__);
1446
1447         if (edge_port == NULL)
1448                 return 0;
1449         if (edge_port->closePending)
1450                 return 0;
1451
1452         if (!edge_port->open) {
1453                 dbg("%s - port not opened", __func__);
1454                 return 0;
1455         }
1456
1457         spin_lock_irqsave(&edge_port->ep_lock, flags);
1458         num_chars = edge_port->maxTxCredits - edge_port->txCredits +
1459                                                 edge_port->txfifo.count;
1460         spin_unlock_irqrestore(&edge_port->ep_lock, flags);
1461         if (num_chars) {
1462                 dbg("%s(port %d) - returns %d", __func__,
1463                                                 port->number, num_chars);
1464         }
1465
1466         return num_chars;
1467 }
1468
1469
1470 /*****************************************************************************
1471  * SerialThrottle
1472  *      this function is called by the tty driver when it wants to stop the data
1473  *      being read from the port.
1474  *****************************************************************************/
1475 static void edge_throttle(struct tty_struct *tty)
1476 {
1477         struct usb_serial_port *port = tty->driver_data;
1478         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1479         int status;
1480
1481         dbg("%s - port %d", __func__, port->number);
1482
1483         if (edge_port == NULL)
1484                 return;
1485
1486         if (!edge_port->open) {
1487                 dbg("%s - port not opened", __func__);
1488                 return;
1489         }
1490
1491         /* if we are implementing XON/XOFF, send the stop character */
1492         if (I_IXOFF(tty)) {
1493                 unsigned char stop_char = STOP_CHAR(tty);
1494                 status = edge_write(tty, port, &stop_char, 1);
1495                 if (status <= 0)
1496                         return;
1497         }
1498
1499         /* if we are implementing RTS/CTS, toggle that line */
1500         if (tty->termios->c_cflag & CRTSCTS) {
1501                 edge_port->shadowMCR &= ~MCR_RTS;
1502                 status = send_cmd_write_uart_register(edge_port, MCR,
1503                                                         edge_port->shadowMCR);
1504                 if (status != 0)
1505                         return;
1506         }
1507
1508         return;
1509 }
1510
1511
1512 /*****************************************************************************
1513  * edge_unthrottle
1514  *      this function is called by the tty driver when it wants to resume the
1515  *      data being read from the port (called after SerialThrottle is called)
1516  *****************************************************************************/
1517 static void edge_unthrottle(struct tty_struct *tty)
1518 {
1519         struct usb_serial_port *port = tty->driver_data;
1520         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1521         int status;
1522
1523         dbg("%s - port %d", __func__, port->number);
1524
1525         if (edge_port == NULL)
1526                 return;
1527
1528         if (!edge_port->open) {
1529                 dbg("%s - port not opened", __func__);
1530                 return;
1531         }
1532
1533         /* if we are implementing XON/XOFF, send the start character */
1534         if (I_IXOFF(tty)) {
1535                 unsigned char start_char = START_CHAR(tty);
1536                 status = edge_write(tty, port, &start_char, 1);
1537                 if (status <= 0)
1538                         return;
1539         }
1540         /* if we are implementing RTS/CTS, toggle that line */
1541         if (tty->termios->c_cflag & CRTSCTS) {
1542                 edge_port->shadowMCR |= MCR_RTS;
1543                 send_cmd_write_uart_register(edge_port, MCR,
1544                                                 edge_port->shadowMCR);
1545         }
1546 }
1547
1548
1549 /*****************************************************************************
1550  * SerialSetTermios
1551  *      this function is called by the tty driver when it wants to change
1552  * the termios structure
1553  *****************************************************************************/
1554 static void edge_set_termios(struct tty_struct *tty,
1555         struct usb_serial_port *port, struct ktermios *old_termios)
1556 {
1557         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1558         unsigned int cflag;
1559
1560         cflag = tty->termios->c_cflag;
1561         dbg("%s - clfag %08x iflag %08x", __func__,
1562             tty->termios->c_cflag, tty->termios->c_iflag);
1563         dbg("%s - old clfag %08x old iflag %08x", __func__,
1564             old_termios->c_cflag, old_termios->c_iflag);
1565
1566         dbg("%s - port %d", __func__, port->number);
1567
1568         if (edge_port == NULL)
1569                 return;
1570
1571         if (!edge_port->open) {
1572                 dbg("%s - port not opened", __func__);
1573                 return;
1574         }
1575
1576         /* change the port settings to the new ones specified */
1577         change_port_settings(tty, edge_port, old_termios);
1578 }
1579
1580
1581 /*****************************************************************************
1582  * get_lsr_info - get line status register info
1583  *
1584  * Purpose: Let user call ioctl() to get info when the UART physically
1585  *          is emptied.  On bus types like RS485, the transmitter must
1586  *          release the bus after transmitting. This must be done when
1587  *          the transmit shift register is empty, not be done when the
1588  *          transmit holding register is empty.  This functionality
1589  *          allows an RS485 driver to be written in user space.
1590  *****************************************************************************/
1591 static int get_lsr_info(struct edgeport_port *edge_port,
1592                                                 unsigned int __user *value)
1593 {
1594         unsigned int result = 0;
1595         unsigned long flags;
1596
1597         spin_lock_irqsave(&edge_port->ep_lock, flags);
1598         if (edge_port->maxTxCredits == edge_port->txCredits &&
1599             edge_port->txfifo.count == 0) {
1600                 dbg("%s -- Empty", __func__);
1601                 result = TIOCSER_TEMT;
1602         }
1603         spin_unlock_irqrestore(&edge_port->ep_lock, flags);
1604
1605         if (copy_to_user(value, &result, sizeof(int)))
1606                 return -EFAULT;
1607         return 0;
1608 }
1609
1610 static int edge_tiocmset(struct tty_struct *tty, struct file *file,
1611                                         unsigned int set, unsigned int clear)
1612 {
1613         struct usb_serial_port *port = tty->driver_data;
1614         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1615         unsigned int mcr;
1616
1617         dbg("%s - port %d", __func__, port->number);
1618
1619         mcr = edge_port->shadowMCR;
1620         if (set & TIOCM_RTS)
1621                 mcr |= MCR_RTS;
1622         if (set & TIOCM_DTR)
1623                 mcr |= MCR_DTR;
1624         if (set & TIOCM_LOOP)
1625                 mcr |= MCR_LOOPBACK;
1626
1627         if (clear & TIOCM_RTS)
1628                 mcr &= ~MCR_RTS;
1629         if (clear & TIOCM_DTR)
1630                 mcr &= ~MCR_DTR;
1631         if (clear & TIOCM_LOOP)
1632                 mcr &= ~MCR_LOOPBACK;
1633
1634         edge_port->shadowMCR = mcr;
1635
1636         send_cmd_write_uart_register(edge_port, MCR, edge_port->shadowMCR);
1637
1638         return 0;
1639 }
1640
1641 static int edge_tiocmget(struct tty_struct *tty, struct file *file)
1642 {
1643         struct usb_serial_port *port = tty->driver_data;
1644         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1645         unsigned int result = 0;
1646         unsigned int msr;
1647         unsigned int mcr;
1648
1649         dbg("%s - port %d", __func__, port->number);
1650
1651         msr = edge_port->shadowMSR;
1652         mcr = edge_port->shadowMCR;
1653         result = ((mcr & MCR_DTR)       ? TIOCM_DTR: 0)   /* 0x002 */
1654                   | ((mcr & MCR_RTS)    ? TIOCM_RTS: 0)   /* 0x004 */
1655                   | ((msr & EDGEPORT_MSR_CTS)   ? TIOCM_CTS: 0)   /* 0x020 */
1656                   | ((msr & EDGEPORT_MSR_CD)    ? TIOCM_CAR: 0)   /* 0x040 */
1657                   | ((msr & EDGEPORT_MSR_RI)    ? TIOCM_RI:  0)   /* 0x080 */
1658                   | ((msr & EDGEPORT_MSR_DSR)   ? TIOCM_DSR: 0);  /* 0x100 */
1659
1660
1661         dbg("%s -- %x", __func__, result);
1662
1663         return result;
1664 }
1665
1666 static int get_serial_info(struct edgeport_port *edge_port,
1667                                 struct serial_struct __user *retinfo)
1668 {
1669         struct serial_struct tmp;
1670
1671         if (!retinfo)
1672                 return -EFAULT;
1673
1674         memset(&tmp, 0, sizeof(tmp));
1675
1676         tmp.type                = PORT_16550A;
1677         tmp.line                = edge_port->port->serial->minor;
1678         tmp.port                = edge_port->port->number;
1679         tmp.irq                 = 0;
1680         tmp.flags               = ASYNC_SKIP_TEST | ASYNC_AUTO_IRQ;
1681         tmp.xmit_fifo_size      = edge_port->maxTxCredits;
1682         tmp.baud_base           = 9600;
1683         tmp.close_delay         = 5*HZ;
1684         tmp.closing_wait        = 30*HZ;
1685
1686         if (copy_to_user(retinfo, &tmp, sizeof(*retinfo)))
1687                 return -EFAULT;
1688         return 0;
1689 }
1690
1691
1692
1693 /*****************************************************************************
1694  * SerialIoctl
1695  *      this function handles any ioctl calls to the driver
1696  *****************************************************************************/
1697 static int edge_ioctl(struct tty_struct *tty, struct file *file,
1698                                         unsigned int cmd, unsigned long arg)
1699 {
1700         struct usb_serial_port *port = tty->driver_data;
1701         DEFINE_WAIT(wait);
1702         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1703         struct async_icount cnow;
1704         struct async_icount cprev;
1705         struct serial_icounter_struct icount;
1706
1707         dbg("%s - port %d, cmd = 0x%x", __func__, port->number, cmd);
1708
1709         switch (cmd) {
1710         case TIOCSERGETLSR:
1711                 dbg("%s (%d) TIOCSERGETLSR", __func__,  port->number);
1712                 return get_lsr_info(edge_port, (unsigned int __user *) arg);
1713
1714         case TIOCGSERIAL:
1715                 dbg("%s (%d) TIOCGSERIAL", __func__,  port->number);
1716                 return get_serial_info(edge_port, (struct serial_struct __user *) arg);
1717
1718         case TIOCMIWAIT:
1719                 dbg("%s (%d) TIOCMIWAIT", __func__,  port->number);
1720                 cprev = edge_port->icount;
1721                 while (1) {
1722                         prepare_to_wait(&edge_port->delta_msr_wait,
1723                                                 &wait, TASK_INTERRUPTIBLE);
1724                         schedule();
1725                         finish_wait(&edge_port->delta_msr_wait, &wait);
1726                         /* see if a signal did it */
1727                         if (signal_pending(current))
1728                                 return -ERESTARTSYS;
1729                         cnow = edge_port->icount;
1730                         if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr &&
1731                             cnow.dcd == cprev.dcd && cnow.cts == cprev.cts)
1732                                 return -EIO; /* no change => error */
1733                         if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
1734                             ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
1735                             ((arg & TIOCM_CD)  && (cnow.dcd != cprev.dcd)) ||
1736                             ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts))) {
1737                                 return 0;
1738                         }
1739                         cprev = cnow;
1740                 }
1741                 /* NOTREACHED */
1742                 break;
1743
1744         case TIOCGICOUNT:
1745                 cnow = edge_port->icount;
1746                 memset(&icount, 0, sizeof(icount));
1747                 icount.cts = cnow.cts;
1748                 icount.dsr = cnow.dsr;
1749                 icount.rng = cnow.rng;
1750                 icount.dcd = cnow.dcd;
1751                 icount.rx = cnow.rx;
1752                 icount.tx = cnow.tx;
1753                 icount.frame = cnow.frame;
1754                 icount.overrun = cnow.overrun;
1755                 icount.parity = cnow.parity;
1756                 icount.brk = cnow.brk;
1757                 icount.buf_overrun = cnow.buf_overrun;
1758
1759                 dbg("%s (%d) TIOCGICOUNT RX=%d, TX=%d",
1760                                 __func__,  port->number, icount.rx, icount.tx);
1761                 if (copy_to_user((void __user *)arg, &icount, sizeof(icount)))
1762                         return -EFAULT;
1763                 return 0;
1764         }
1765         return -ENOIOCTLCMD;
1766 }
1767
1768
1769 /*****************************************************************************
1770  * SerialBreak
1771  *      this function sends a break to the port
1772  *****************************************************************************/
1773 static void edge_break(struct tty_struct *tty, int break_state)
1774 {
1775         struct usb_serial_port *port = tty->driver_data;
1776         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1777         struct edgeport_serial *edge_serial = usb_get_serial_data(port->serial);
1778         int status;
1779
1780         if ((!edge_serial->is_epic) ||
1781             ((edge_serial->is_epic) &&
1782              (edge_serial->epic_descriptor.Supports.IOSPChase))) {
1783                 /* flush and chase */
1784                 edge_port->chaseResponsePending = true;
1785
1786                 dbg("%s - Sending IOSP_CMD_CHASE_PORT", __func__);
1787                 status = send_iosp_ext_cmd(edge_port, IOSP_CMD_CHASE_PORT, 0);
1788                 if (status == 0) {
1789                         /* block until chase finished */
1790                         block_until_chase_response(edge_port);
1791                 } else {
1792                         edge_port->chaseResponsePending = false;
1793                 }
1794         }
1795
1796         if ((!edge_serial->is_epic) ||
1797             ((edge_serial->is_epic) &&
1798              (edge_serial->epic_descriptor.Supports.IOSPSetClrBreak))) {
1799                 if (break_state == -1) {
1800                         dbg("%s - Sending IOSP_CMD_SET_BREAK", __func__);
1801                         status = send_iosp_ext_cmd(edge_port,
1802                                                 IOSP_CMD_SET_BREAK, 0);
1803                 } else {
1804                         dbg("%s - Sending IOSP_CMD_CLEAR_BREAK", __func__);
1805                         status = send_iosp_ext_cmd(edge_port,
1806                                                 IOSP_CMD_CLEAR_BREAK, 0);
1807                 }
1808                 if (status)
1809                         dbg("%s - error sending break set/clear command.",
1810                                 __func__);
1811         }
1812
1813         return;
1814 }
1815
1816
1817 /*****************************************************************************
1818  * process_rcvd_data
1819  *      this function handles the data received on the bulk in pipe.
1820  *****************************************************************************/
1821 static void process_rcvd_data(struct edgeport_serial *edge_serial,
1822                                 unsigned char *buffer, __u16 bufferLength)
1823 {
1824         struct usb_serial_port *port;
1825         struct edgeport_port *edge_port;
1826         struct tty_struct *tty;
1827         __u16 lastBufferLength;
1828         __u16 rxLen;
1829
1830         dbg("%s", __func__);
1831
1832         lastBufferLength = bufferLength + 1;
1833
1834         while (bufferLength > 0) {
1835                 /* failsafe incase we get a message that we don't understand */
1836                 if (lastBufferLength == bufferLength) {
1837                         dbg("%s - stuck in loop, exiting it.", __func__);
1838                         break;
1839                 }
1840                 lastBufferLength = bufferLength;
1841
1842                 switch (edge_serial->rxState) {
1843                 case EXPECT_HDR1:
1844                         edge_serial->rxHeader1 = *buffer;
1845                         ++buffer;
1846                         --bufferLength;
1847
1848                         if (bufferLength == 0) {
1849                                 edge_serial->rxState = EXPECT_HDR2;
1850                                 break;
1851                         }
1852                         /* otherwise, drop on through */
1853                 case EXPECT_HDR2:
1854                         edge_serial->rxHeader2 = *buffer;
1855                         ++buffer;
1856                         --bufferLength;
1857
1858                         dbg("%s - Hdr1=%02X Hdr2=%02X", __func__,
1859                             edge_serial->rxHeader1, edge_serial->rxHeader2);
1860                         /* Process depending on whether this header is
1861                          * data or status */
1862
1863                         if (IS_CMD_STAT_HDR(edge_serial->rxHeader1)) {
1864                                 /* Decode this status header and go to
1865                                  * EXPECT_HDR1 (if we can process the status
1866                                  * with only 2 bytes), or go to EXPECT_HDR3 to
1867                                  * get the third byte. */
1868                                 edge_serial->rxPort =
1869                                     IOSP_GET_HDR_PORT(edge_serial->rxHeader1);
1870                                 edge_serial->rxStatusCode =
1871                                     IOSP_GET_STATUS_CODE(
1872                                                 edge_serial->rxHeader1);
1873
1874                                 if (!IOSP_STATUS_IS_2BYTE(
1875                                                 edge_serial->rxStatusCode)) {
1876                                         /* This status needs additional bytes.
1877                                          * Save what we have and then wait for
1878                                          * more data.
1879                                          */
1880                                         edge_serial->rxStatusParam
1881                                                 = edge_serial->rxHeader2;
1882                                         edge_serial->rxState = EXPECT_HDR3;
1883                                         break;
1884                                 }
1885                                 /* We have all the header bytes, process the
1886                                    status now */
1887                                 process_rcvd_status(edge_serial,
1888                                                 edge_serial->rxHeader2, 0);
1889                                 edge_serial->rxState = EXPECT_HDR1;
1890                                 break;
1891                         } else {
1892                                 edge_serial->rxPort =
1893                                     IOSP_GET_HDR_PORT(edge_serial->rxHeader1);
1894                                 edge_serial->rxBytesRemaining =
1895                                     IOSP_GET_HDR_DATA_LEN(
1896                                                 edge_serial->rxHeader1,
1897                                                 edge_serial->rxHeader2);
1898                                 dbg("%s - Data for Port %u Len %u",
1899                                                 __func__,
1900                                                 edge_serial->rxPort,
1901                                                 edge_serial->rxBytesRemaining);
1902
1903                                 /* ASSERT(DevExt->RxPort < DevExt->NumPorts);
1904                                  * ASSERT(DevExt->RxBytesRemaining <
1905                                  *              IOSP_MAX_DATA_LENGTH);
1906                                  */
1907
1908                                 if (bufferLength == 0) {
1909                                         edge_serial->rxState = EXPECT_DATA;
1910                                         break;
1911                                 }
1912                                 /* Else, drop through */
1913                         }
1914                 case EXPECT_DATA: /* Expect data */
1915                         if (bufferLength < edge_serial->rxBytesRemaining) {
1916                                 rxLen = bufferLength;
1917                                 /* Expect data to start next buffer */
1918                                 edge_serial->rxState = EXPECT_DATA;
1919                         } else {
1920                                 /* BufLen >= RxBytesRemaining */
1921                                 rxLen = edge_serial->rxBytesRemaining;
1922                                 /* Start another header next time */
1923                                 edge_serial->rxState = EXPECT_HDR1;
1924                         }
1925
1926                         bufferLength -= rxLen;
1927                         edge_serial->rxBytesRemaining -= rxLen;
1928
1929                         /* spit this data back into the tty driver if this
1930                            port is open */
1931                         if (rxLen) {
1932                                 port = edge_serial->serial->port[
1933                                                         edge_serial->rxPort];
1934                                 edge_port = usb_get_serial_port_data(port);
1935                                 if (edge_port->open) {
1936                                         tty = tty_port_tty_get(
1937                                                 &edge_port->port->port);
1938                                         if (tty) {
1939                                                 dbg("%s - Sending %d bytes to TTY for port %d",
1940                                                         __func__, rxLen, edge_serial->rxPort);
1941                                                 edge_tty_recv(&edge_serial->serial->dev->dev, tty, buffer, rxLen);
1942                                                 tty_kref_put(tty);
1943                                         }
1944                                         edge_port->icount.rx += rxLen;
1945                                 }
1946                                 buffer += rxLen;
1947                         }
1948                         break;
1949
1950                 case EXPECT_HDR3:       /* Expect 3rd byte of status header */
1951                         edge_serial->rxHeader3 = *buffer;
1952                         ++buffer;
1953                         --bufferLength;
1954
1955                         /* We have all the header bytes, process the
1956                            status now */
1957                         process_rcvd_status(edge_serial,
1958                                 edge_serial->rxStatusParam,
1959                                 edge_serial->rxHeader3);
1960                         edge_serial->rxState = EXPECT_HDR1;
1961                         break;
1962                 }
1963         }
1964 }
1965
1966
1967 /*****************************************************************************
1968  * process_rcvd_status
1969  *      this function handles the any status messages received on the
1970  *      bulk in pipe.
1971  *****************************************************************************/
1972 static void process_rcvd_status(struct edgeport_serial *edge_serial,
1973                                                 __u8 byte2, __u8 byte3)
1974 {
1975         struct usb_serial_port *port;
1976         struct edgeport_port *edge_port;
1977         struct tty_struct *tty;
1978         __u8 code = edge_serial->rxStatusCode;
1979
1980         /* switch the port pointer to the one being currently talked about */
1981         port = edge_serial->serial->port[edge_serial->rxPort];
1982         edge_port = usb_get_serial_port_data(port);
1983         if (edge_port == NULL) {
1984                 dev_err(&edge_serial->serial->dev->dev,
1985                         "%s - edge_port == NULL for port %d\n",
1986                                         __func__, edge_serial->rxPort);
1987                 return;
1988         }
1989
1990         dbg("%s - port %d", __func__, edge_serial->rxPort);
1991
1992         if (code == IOSP_EXT_STATUS) {
1993                 switch (byte2) {
1994                 case IOSP_EXT_STATUS_CHASE_RSP:
1995                         /* we want to do EXT status regardless of port
1996                          * open/closed */
1997                         dbg("%s - Port %u EXT CHASE_RSP Data = %02x",
1998                                         __func__, edge_serial->rxPort, byte3);
1999                         /* Currently, the only EXT_STATUS is Chase, so process
2000                          * here instead of one more call to one more subroutine
2001                          * If/when more EXT_STATUS, there'll be more work to do
2002                          * Also, we currently clear flag and close the port
2003                          * regardless of content of above's Byte3.
2004                          * We could choose to do something else when Byte3 says
2005                          * Timeout on Chase from Edgeport, like wait longer in
2006                          * block_until_chase_response, but for now we don't.
2007                          */
2008                         edge_port->chaseResponsePending = false;
2009                         wake_up(&edge_port->wait_chase);
2010                         return;
2011
2012                 case IOSP_EXT_STATUS_RX_CHECK_RSP:
2013                         dbg("%s ========== Port %u CHECK_RSP Sequence = %02x =============\n", __func__, edge_serial->rxPort, byte3);
2014                         /* Port->RxCheckRsp = true; */
2015                         return;
2016                 }
2017         }
2018
2019         if (code == IOSP_STATUS_OPEN_RSP) {
2020                 edge_port->txCredits = GET_TX_BUFFER_SIZE(byte3);
2021                 edge_port->maxTxCredits = edge_port->txCredits;
2022                 dbg("%s - Port %u Open Response Inital MSR = %02x TxBufferSize = %d", __func__, edge_serial->rxPort, byte2, edge_port->txCredits);
2023                 handle_new_msr(edge_port, byte2);
2024
2025                 /* send the current line settings to the port so we are
2026                    in sync with any further termios calls */
2027                 tty = tty_port_tty_get(&edge_port->port->port);
2028                 if (tty) {
2029                         change_port_settings(tty,
2030                                 edge_port, tty->termios);
2031                         tty_kref_put(tty);
2032                 }
2033
2034                 /* we have completed the open */
2035                 edge_port->openPending = false;
2036                 edge_port->open = true;
2037                 wake_up(&edge_port->wait_open);
2038                 return;
2039         }
2040
2041         /* If port is closed, silently discard all rcvd status. We can
2042          * have cases where buffered status is received AFTER the close
2043          * port command is sent to the Edgeport.
2044          */
2045         if (!edge_port->open || edge_port->closePending)
2046                 return;
2047
2048         switch (code) {
2049         /* Not currently sent by Edgeport */
2050         case IOSP_STATUS_LSR:
2051                 dbg("%s - Port %u LSR Status = %02x",
2052                                         __func__, edge_serial->rxPort, byte2);
2053                 handle_new_lsr(edge_port, false, byte2, 0);
2054                 break;
2055
2056         case IOSP_STATUS_LSR_DATA:
2057                 dbg("%s - Port %u LSR Status = %02x, Data = %02x",
2058                                 __func__, edge_serial->rxPort, byte2, byte3);
2059                 /* byte2 is LSR Register */
2060                 /* byte3 is broken data byte */
2061                 handle_new_lsr(edge_port, true, byte2, byte3);
2062                 break;
2063         /*
2064          *      case IOSP_EXT_4_STATUS:
2065          *              dbg("%s - Port %u LSR Status = %02x Data = %02x",
2066          *                      __func__, edge_serial->rxPort, byte2, byte3);
2067          *              break;
2068          */
2069         case IOSP_STATUS_MSR:
2070                 dbg("%s - Port %u MSR Status = %02x",
2071                                         __func__, edge_serial->rxPort, byte2);
2072                 /*
2073                  * Process this new modem status and generate appropriate
2074                  * events, etc, based on the new status. This routine
2075                  * also saves the MSR in Port->ShadowMsr.
2076                  */
2077                 handle_new_msr(edge_port, byte2);
2078                 break;
2079
2080         default:
2081                 dbg("%s - Unrecognized IOSP status code %u\n", __func__, code);
2082                 break;
2083         }
2084         return;
2085 }
2086
2087
2088 /*****************************************************************************
2089  * edge_tty_recv
2090  *      this function passes data on to the tty flip buffer
2091  *****************************************************************************/
2092 static void edge_tty_recv(struct device *dev, struct tty_struct *tty,
2093                                         unsigned char *data, int length)
2094 {
2095         int cnt;
2096
2097         do {
2098                 cnt = tty_buffer_request_room(tty, length);
2099                 if (cnt < length) {
2100                         dev_err(dev, "%s - dropping data, %d bytes lost\n",
2101                                         __func__, length - cnt);
2102                         if (cnt == 0)
2103                                 break;
2104                 }
2105                 tty_insert_flip_string(tty, data, cnt);
2106                 data += cnt;
2107                 length -= cnt;
2108         } while (length > 0);
2109
2110         tty_flip_buffer_push(tty);
2111 }
2112
2113
2114 /*****************************************************************************
2115  * handle_new_msr
2116  *      this function handles any change to the msr register for a port.
2117  *****************************************************************************/
2118 static void handle_new_msr(struct edgeport_port *edge_port, __u8 newMsr)
2119 {
2120         struct  async_icount *icount;
2121
2122         dbg("%s %02x", __func__, newMsr);
2123
2124         if (newMsr & (EDGEPORT_MSR_DELTA_CTS | EDGEPORT_MSR_DELTA_DSR |
2125                         EDGEPORT_MSR_DELTA_RI | EDGEPORT_MSR_DELTA_CD)) {
2126                 icount = &edge_port->icount;
2127
2128                 /* update input line counters */
2129                 if (newMsr & EDGEPORT_MSR_DELTA_CTS)
2130                         icount->cts++;
2131                 if (newMsr & EDGEPORT_MSR_DELTA_DSR)
2132                         icount->dsr++;
2133                 if (newMsr & EDGEPORT_MSR_DELTA_CD)
2134                         icount->dcd++;
2135                 if (newMsr & EDGEPORT_MSR_DELTA_RI)
2136                         icount->rng++;
2137                 wake_up_interruptible(&edge_port->delta_msr_wait);
2138         }
2139
2140         /* Save the new modem status */
2141         edge_port->shadowMSR = newMsr & 0xf0;
2142
2143         return;
2144 }
2145
2146
2147 /*****************************************************************************
2148  * handle_new_lsr
2149  *      this function handles any change to the lsr register for a port.
2150  *****************************************************************************/
2151 static void handle_new_lsr(struct edgeport_port *edge_port, __u8 lsrData,
2152                                                         __u8 lsr, __u8 data)
2153 {
2154         __u8 newLsr = (__u8) (lsr & (__u8)
2155                 (LSR_OVER_ERR | LSR_PAR_ERR | LSR_FRM_ERR | LSR_BREAK));
2156         struct async_icount *icount;
2157
2158         dbg("%s - %02x", __func__, newLsr);
2159
2160         edge_port->shadowLSR = lsr;
2161
2162         if (newLsr & LSR_BREAK) {
2163                 /*
2164                  * Parity and Framing errors only count if they
2165                  * occur exclusive of a break being
2166                  * received.
2167                  */
2168                 newLsr &= (__u8)(LSR_OVER_ERR | LSR_BREAK);
2169         }
2170
2171         /* Place LSR data byte into Rx buffer */
2172         if (lsrData) {
2173                 struct tty_struct *tty =
2174                                 tty_port_tty_get(&edge_port->port->port);
2175                 if (tty) {
2176                         edge_tty_recv(&edge_port->port->dev, tty, &data, 1);
2177                         tty_kref_put(tty);
2178                 }
2179         }
2180         /* update input line counters */
2181         icount = &edge_port->icount;
2182         if (newLsr & LSR_BREAK)
2183                 icount->brk++;
2184         if (newLsr & LSR_OVER_ERR)
2185                 icount->overrun++;
2186         if (newLsr & LSR_PAR_ERR)
2187                 icount->parity++;
2188         if (newLsr & LSR_FRM_ERR)
2189                 icount->frame++;
2190
2191         return;
2192 }
2193
2194
2195 /****************************************************************************
2196  * sram_write
2197  *      writes a number of bytes to the Edgeport device's sram starting at the
2198  *      given address.
2199  *      If successful returns the number of bytes written, otherwise it returns
2200  *      a negative error number of the problem.
2201  ****************************************************************************/
2202 static int sram_write(struct usb_serial *serial, __u16 extAddr, __u16 addr,
2203                                         __u16 length, const __u8 *data)
2204 {
2205         int result;
2206         __u16 current_length;
2207         unsigned char *transfer_buffer;
2208
2209         dbg("%s - %x, %x, %d", __func__, extAddr, addr, length);
2210
2211         transfer_buffer =  kmalloc(64, GFP_KERNEL);
2212         if (!transfer_buffer) {
2213                 dev_err(&serial->dev->dev, "%s - kmalloc(%d) failed.\n",
2214                                                         __func__, 64);
2215                 return -ENOMEM;
2216         }
2217
2218         /* need to split these writes up into 64 byte chunks */
2219         result = 0;
2220         while (length > 0) {
2221                 if (length > 64)
2222                         current_length = 64;
2223                 else
2224                         current_length = length;
2225
2226 /*              dbg("%s - writing %x, %x, %d", __func__,
2227                                         extAddr, addr, current_length); */
2228                 memcpy(transfer_buffer, data, current_length);
2229                 result = usb_control_msg(serial->dev,
2230                                         usb_sndctrlpipe(serial->dev, 0),
2231                                         USB_REQUEST_ION_WRITE_RAM,
2232                                         0x40, addr, extAddr, transfer_buffer,
2233                                         current_length, 300);
2234                 if (result < 0)
2235                         break;
2236                 length -= current_length;
2237                 addr += current_length;
2238                 data += current_length;
2239         }
2240
2241         kfree(transfer_buffer);
2242         return result;
2243 }
2244
2245
2246 /****************************************************************************
2247  * rom_write
2248  *      writes a number of bytes to the Edgeport device's ROM starting at the
2249  *      given address.
2250  *      If successful returns the number of bytes written, otherwise it returns
2251  *      a negative error number of the problem.
2252  ****************************************************************************/
2253 static int rom_write(struct usb_serial *serial, __u16 extAddr, __u16 addr,
2254                                         __u16 length, const __u8 *data)
2255 {
2256         int result;
2257         __u16 current_length;
2258         unsigned char *transfer_buffer;
2259
2260 /*      dbg("%s - %x, %x, %d", __func__, extAddr, addr, length); */
2261
2262         transfer_buffer =  kmalloc(64, GFP_KERNEL);
2263         if (!transfer_buffer) {
2264                 dev_err(&serial->dev->dev, "%s - kmalloc(%d) failed.\n",
2265                                                                 __func__, 64);
2266                 return -ENOMEM;
2267         }
2268
2269         /* need to split these writes up into 64 byte chunks */
2270         result = 0;
2271         while (length > 0) {
2272                 if (length > 64)
2273                         current_length = 64;
2274                 else
2275                         current_length = length;
2276 /*              dbg("%s - writing %x, %x, %d", __func__,
2277                                         extAddr, addr, current_length); */
2278                 memcpy(transfer_buffer, data, current_length);
2279                 result = usb_control_msg(serial->dev,
2280                                         usb_sndctrlpipe(serial->dev, 0),
2281                                         USB_REQUEST_ION_WRITE_ROM, 0x40,
2282                                         addr, extAddr,
2283                                         transfer_buffer, current_length, 300);
2284                 if (result < 0)
2285                         break;
2286                 length -= current_length;
2287                 addr += current_length;
2288                 data += current_length;
2289         }
2290
2291         kfree(transfer_buffer);
2292         return result;
2293 }
2294
2295
2296 /****************************************************************************
2297  * rom_read
2298  *      reads a number of bytes from the Edgeport device starting at the given
2299  *      address.
2300  *      If successful returns the number of bytes read, otherwise it returns
2301  *      a negative error number of the problem.
2302  ****************************************************************************/
2303 static int rom_read(struct usb_serial *serial, __u16 extAddr,
2304                                         __u16 addr, __u16 length, __u8 *data)
2305 {
2306         int result;
2307         __u16 current_length;
2308         unsigned char *transfer_buffer;
2309
2310         dbg("%s - %x, %x, %d", __func__, extAddr, addr, length);
2311
2312         transfer_buffer =  kmalloc(64, GFP_KERNEL);
2313         if (!transfer_buffer) {
2314                 dev_err(&serial->dev->dev,
2315                         "%s - kmalloc(%d) failed.\n", __func__, 64);
2316                 return -ENOMEM;
2317         }
2318
2319         /* need to split these reads up into 64 byte chunks */
2320         result = 0;
2321         while (length > 0) {
2322                 if (length > 64)
2323                         current_length = 64;
2324                 else
2325                         current_length = length;
2326 /*              dbg("%s - %x, %x, %d", __func__,
2327                                 extAddr, addr, current_length); */
2328                 result = usb_control_msg(serial->dev,
2329                                         usb_rcvctrlpipe(serial->dev, 0),
2330                                         USB_REQUEST_ION_READ_ROM,
2331                                         0xC0, addr, extAddr, transfer_buffer,
2332                                         current_length, 300);
2333                 if (result < 0)
2334                         break;
2335                 memcpy(data, transfer_buffer, current_length);
2336                 length -= current_length;
2337                 addr += current_length;
2338                 data += current_length;
2339         }
2340
2341         kfree(transfer_buffer);
2342         return result;
2343 }
2344
2345
2346 /****************************************************************************
2347  * send_iosp_ext_cmd
2348  *      Is used to send a IOSP message to the Edgeport device
2349  ****************************************************************************/
2350 static int send_iosp_ext_cmd(struct edgeport_port *edge_port,
2351                                                 __u8 command, __u8 param)
2352 {
2353         unsigned char   *buffer;
2354         unsigned char   *currentCommand;
2355         int             length = 0;
2356         int             status = 0;
2357
2358         dbg("%s - %d, %d", __func__, command, param);
2359
2360         buffer = kmalloc(10, GFP_ATOMIC);
2361         if (!buffer) {
2362                 dev_err(&edge_port->port->dev,
2363                                 "%s - kmalloc(%d) failed.\n", __func__, 10);
2364                 return -ENOMEM;
2365         }
2366
2367         currentCommand = buffer;
2368
2369         MAKE_CMD_EXT_CMD(&currentCommand, &length,
2370                 edge_port->port->number - edge_port->port->serial->minor,
2371                 command, param);
2372
2373         status = write_cmd_usb(edge_port, buffer, length);
2374         if (status) {
2375                 /* something bad happened, let's free up the memory */
2376                 kfree(buffer);
2377         }
2378
2379         return status;
2380 }
2381
2382
2383 /*****************************************************************************
2384  * write_cmd_usb
2385  *      this function writes the given buffer out to the bulk write endpoint.
2386  *****************************************************************************/
2387 static int write_cmd_usb(struct edgeport_port *edge_port,
2388                                         unsigned char *buffer, int length)
2389 {
2390         struct edgeport_serial *edge_serial =
2391                                 usb_get_serial_data(edge_port->port->serial);
2392         int status = 0;
2393         struct urb *urb;
2394         int timeout;
2395
2396         usb_serial_debug_data(debug, &edge_port->port->dev,
2397                                                 __func__, length, buffer);
2398
2399         /* Allocate our next urb */
2400         urb = usb_alloc_urb(0, GFP_ATOMIC);
2401         if (!urb)
2402                 return -ENOMEM;
2403
2404         atomic_inc(&CmdUrbs);
2405         dbg("%s - ALLOCATE URB %p (outstanding %d)",
2406                                 __func__, urb, atomic_read(&CmdUrbs));
2407
2408         usb_fill_bulk_urb(urb, edge_serial->serial->dev,
2409                         usb_sndbulkpipe(edge_serial->serial->dev,
2410                                         edge_serial->bulk_out_endpoint),
2411                         buffer, length, edge_bulk_out_cmd_callback, edge_port);
2412
2413         edge_port->commandPending = true;
2414         status = usb_submit_urb(urb, GFP_ATOMIC);
2415
2416         if (status) {
2417                 /* something went wrong */
2418                 dev_err(&edge_port->port->dev,
2419                     "%s - usb_submit_urb(write command) failed, status = %d\n",
2420                                                         __func__, status);
2421                 usb_kill_urb(urb);
2422                 usb_free_urb(urb);
2423                 atomic_dec(&CmdUrbs);
2424                 return status;
2425         }
2426
2427         /* wait for command to finish */
2428         timeout = COMMAND_TIMEOUT;
2429 #if 0
2430         wait_event(&edge_port->wait_command, !edge_port->commandPending);
2431
2432         if (edge_port->commandPending) {
2433                 /* command timed out */
2434                 dbg("%s - command timed out", __func__);
2435                 status = -EINVAL;
2436         }
2437 #endif
2438         return status;
2439 }
2440
2441
2442 /*****************************************************************************
2443  * send_cmd_write_baud_rate
2444  *      this function sends the proper command to change the baud rate of the
2445  *      specified port.
2446  *****************************************************************************/
2447 static int send_cmd_write_baud_rate(struct edgeport_port *edge_port,
2448                                                                 int baudRate)
2449 {
2450         struct edgeport_serial *edge_serial =
2451                                 usb_get_serial_data(edge_port->port->serial);
2452         unsigned char *cmdBuffer;
2453         unsigned char *currCmd;
2454         int cmdLen = 0;
2455         int divisor;
2456         int status;
2457         unsigned char number =
2458                 edge_port->port->number - edge_port->port->serial->minor;
2459
2460         if (edge_serial->is_epic &&
2461             !edge_serial->epic_descriptor.Supports.IOSPSetBaudRate) {
2462                 dbg("SendCmdWriteBaudRate - NOT Setting baud rate for port = %d, baud = %d",
2463                     edge_port->port->number, baudRate);
2464                 return 0;
2465         }
2466
2467         dbg("%s - port = %d, baud = %d", __func__,
2468                                         edge_port->port->number, baudRate);
2469
2470         status = calc_baud_rate_divisor(baudRate, &divisor);
2471         if (status) {
2472                 dev_err(&edge_port->port->dev, "%s - bad baud rate\n",
2473                                                                 __func__);
2474                 return status;
2475         }
2476
2477         /* Alloc memory for the string of commands. */
2478         cmdBuffer =  kmalloc(0x100, GFP_ATOMIC);
2479         if (!cmdBuffer) {
2480                 dev_err(&edge_port->port->dev,
2481                         "%s - kmalloc(%d) failed.\n", __func__, 0x100);
2482                 return -ENOMEM;
2483         }
2484         currCmd = cmdBuffer;
2485
2486         /* Enable access to divisor latch */
2487         MAKE_CMD_WRITE_REG(&currCmd, &cmdLen, number, LCR, LCR_DL_ENABLE);
2488
2489         /* Write the divisor itself */
2490         MAKE_CMD_WRITE_REG(&currCmd, &cmdLen, number, DLL, LOW8(divisor));
2491         MAKE_CMD_WRITE_REG(&currCmd, &cmdLen, number, DLM, HIGH8(divisor));
2492
2493         /* Restore original value to disable access to divisor latch */
2494         MAKE_CMD_WRITE_REG(&currCmd, &cmdLen, number, LCR,
2495                                                 edge_port->shadowLCR);
2496
2497         status = write_cmd_usb(edge_port, cmdBuffer, cmdLen);
2498         if (status) {
2499                 /* something bad happened, let's free up the memory */
2500                 kfree(cmdBuffer);
2501         }
2502
2503         return status;
2504 }
2505
2506
2507 /*****************************************************************************
2508  * calc_baud_rate_divisor
2509  *      this function calculates the proper baud rate divisor for the specified
2510  *      baud rate.
2511  *****************************************************************************/
2512 static int calc_baud_rate_divisor(int baudrate, int *divisor)
2513 {
2514         int i;
2515         __u16 custom;
2516
2517
2518         dbg("%s - %d", __func__, baudrate);
2519
2520         for (i = 0; i < ARRAY_SIZE(divisor_table); i++) {
2521                 if (divisor_table[i].BaudRate == baudrate) {
2522                         *divisor = divisor_table[i].Divisor;
2523                         return 0;
2524                 }
2525         }
2526
2527         /* We have tried all of the standard baud rates
2528          * lets try to calculate the divisor for this baud rate
2529          * Make sure the baud rate is reasonable */
2530         if (baudrate > 50 && baudrate < 230400) {
2531                 /* get divisor */
2532                 custom = (__u16)((230400L + baudrate/2) / baudrate);
2533
2534                 *divisor = custom;
2535
2536                 dbg("%s - Baud %d = %d\n", __func__, baudrate, custom);
2537                 return 0;
2538         }
2539
2540         return -1;
2541 }
2542
2543
2544 /*****************************************************************************
2545  * send_cmd_write_uart_register
2546  *  this function builds up a uart register message and sends to to the device.
2547  *****************************************************************************/
2548 static int send_cmd_write_uart_register(struct edgeport_port *edge_port,
2549                                                 __u8 regNum, __u8 regValue)
2550 {
2551         struct edgeport_serial *edge_serial =
2552                                 usb_get_serial_data(edge_port->port->serial);
2553         unsigned char *cmdBuffer;
2554         unsigned char *currCmd;
2555         unsigned long cmdLen = 0;
2556         int status;
2557
2558         dbg("%s - write to %s register 0x%02x",
2559                         (regNum == MCR) ? "MCR" : "LCR", __func__, regValue);
2560
2561         if (edge_serial->is_epic &&
2562             !edge_serial->epic_descriptor.Supports.IOSPWriteMCR &&
2563             regNum == MCR) {
2564                 dbg("SendCmdWriteUartReg - Not writing to MCR Register");
2565                 return 0;
2566         }
2567
2568         if (edge_serial->is_epic &&
2569             !edge_serial->epic_descriptor.Supports.IOSPWriteLCR &&
2570             regNum == LCR) {
2571                 dbg("SendCmdWriteUartReg - Not writing to LCR Register");
2572                 return 0;
2573         }
2574
2575         /* Alloc memory for the string of commands. */
2576         cmdBuffer = kmalloc(0x10, GFP_ATOMIC);
2577         if (cmdBuffer == NULL)
2578                 return -ENOMEM;
2579
2580         currCmd = cmdBuffer;
2581
2582         /* Build a cmd in the buffer to write the given register */
2583         MAKE_CMD_WRITE_REG(&currCmd, &cmdLen,
2584                 edge_port->port->number - edge_port->port->serial->minor,
2585                 regNum, regValue);
2586
2587         status = write_cmd_usb(edge_port, cmdBuffer, cmdLen);
2588         if (status) {
2589                 /* something bad happened, let's free up the memory */
2590                 kfree(cmdBuffer);
2591         }
2592
2593         return status;
2594 }
2595
2596
2597 /*****************************************************************************
2598  * change_port_settings
2599  *      This routine is called to set the UART on the device to match the
2600  *      specified new settings.
2601  *****************************************************************************/
2602
2603 static void change_port_settings(struct tty_struct *tty,
2604         struct edgeport_port *edge_port, struct ktermios *old_termios)
2605 {
2606         struct edgeport_serial *edge_serial =
2607                         usb_get_serial_data(edge_port->port->serial);
2608         int baud;
2609         unsigned cflag;
2610         __u8 mask = 0xff;
2611         __u8 lData;
2612         __u8 lParity;
2613         __u8 lStop;
2614         __u8 rxFlow;
2615         __u8 txFlow;
2616         int status;
2617
2618         dbg("%s - port %d", __func__, edge_port->port->number);
2619
2620         if (!edge_port->open &&
2621             !edge_port->openPending) {
2622                 dbg("%s - port not opened", __func__);
2623                 return;
2624         }
2625
2626         cflag = tty->termios->c_cflag;
2627
2628         switch (cflag & CSIZE) {
2629         case CS5:
2630                 lData = LCR_BITS_5; mask = 0x1f;
2631                 dbg("%s - data bits = 5", __func__);
2632                 break;
2633         case CS6:
2634                 lData = LCR_BITS_6; mask = 0x3f;
2635                 dbg("%s - data bits = 6", __func__);
2636                 break;
2637         case CS7:
2638                 lData = LCR_BITS_7; mask = 0x7f;
2639                 dbg("%s - data bits = 7", __func__);
2640                 break;
2641         default:
2642         case CS8:
2643                 lData = LCR_BITS_8;
2644                 dbg("%s - data bits = 8", __func__);
2645                 break;
2646         }
2647
2648         lParity = LCR_PAR_NONE;
2649         if (cflag & PARENB) {
2650                 if (cflag & CMSPAR) {
2651                         if (cflag & PARODD) {
2652                                 lParity = LCR_PAR_MARK;
2653                                 dbg("%s - parity = mark", __func__);
2654                         } else {
2655                                 lParity = LCR_PAR_SPACE;
2656                                 dbg("%s - parity = space", __func__);
2657                         }
2658                 } else if (cflag & PARODD) {
2659                         lParity = LCR_PAR_ODD;
2660                         dbg("%s - parity = odd", __func__);
2661                 } else {
2662                         lParity = LCR_PAR_EVEN;
2663                         dbg("%s - parity = even", __func__);
2664                 }
2665         } else {
2666                 dbg("%s - parity = none", __func__);
2667         }
2668
2669         if (cflag & CSTOPB) {
2670                 lStop = LCR_STOP_2;
2671                 dbg("%s - stop bits = 2", __func__);
2672         } else {
2673                 lStop = LCR_STOP_1;
2674                 dbg("%s - stop bits = 1", __func__);
2675         }
2676
2677         /* figure out the flow control settings */
2678         rxFlow = txFlow = 0x00;
2679         if (cflag & CRTSCTS) {
2680                 rxFlow |= IOSP_RX_FLOW_RTS;
2681                 txFlow |= IOSP_TX_FLOW_CTS;
2682                 dbg("%s - RTS/CTS is enabled", __func__);
2683         } else {
2684                 dbg("%s - RTS/CTS is disabled", __func__);
2685         }
2686
2687         /* if we are implementing XON/XOFF, set the start and stop character
2688            in the device */
2689         if (I_IXOFF(tty) || I_IXON(tty)) {
2690                 unsigned char stop_char  = STOP_CHAR(tty);
2691                 unsigned char start_char = START_CHAR(tty);
2692
2693                 if ((!edge_serial->is_epic) ||
2694                     ((edge_serial->is_epic) &&
2695                      (edge_serial->epic_descriptor.Supports.IOSPSetXChar))) {
2696                         send_iosp_ext_cmd(edge_port,
2697                                         IOSP_CMD_SET_XON_CHAR, start_char);
2698                         send_iosp_ext_cmd(edge_port,
2699                                         IOSP_CMD_SET_XOFF_CHAR, stop_char);
2700                 }
2701
2702                 /* if we are implementing INBOUND XON/XOFF */
2703                 if (I_IXOFF(tty)) {
2704                         rxFlow |= IOSP_RX_FLOW_XON_XOFF;
2705                         dbg("%s - INBOUND XON/XOFF is enabled, XON = %2x, XOFF = %2x",
2706                                         __func__, start_char, stop_char);
2707                 } else {
2708                         dbg("%s - INBOUND XON/XOFF is disabled", __func__);
2709                 }
2710
2711                 /* if we are implementing OUTBOUND XON/XOFF */
2712                 if (I_IXON(tty)) {
2713                         txFlow |= IOSP_TX_FLOW_XON_XOFF;
2714                         dbg("%s - OUTBOUND XON/XOFF is enabled, XON = %2x, XOFF = %2x",
2715                                         __func__, start_char, stop_char);
2716                 } else {
2717                         dbg("%s - OUTBOUND XON/XOFF is disabled", __func__);
2718                 }
2719         }
2720
2721         /* Set flow control to the configured value */
2722         if ((!edge_serial->is_epic) ||
2723             ((edge_serial->is_epic) &&
2724              (edge_serial->epic_descriptor.Supports.IOSPSetRxFlow)))
2725                 send_iosp_ext_cmd(edge_port, IOSP_CMD_SET_RX_FLOW, rxFlow);
2726         if ((!edge_serial->is_epic) ||
2727             ((edge_serial->is_epic) &&
2728              (edge_serial->epic_descriptor.Supports.IOSPSetTxFlow)))
2729                 send_iosp_ext_cmd(edge_port, IOSP_CMD_SET_TX_FLOW, txFlow);
2730
2731
2732         edge_port->shadowLCR &= ~(LCR_BITS_MASK | LCR_STOP_MASK | LCR_PAR_MASK);
2733         edge_port->shadowLCR |= (lData | lParity | lStop);
2734
2735         edge_port->validDataMask = mask;
2736
2737         /* Send the updated LCR value to the EdgePort */
2738         status = send_cmd_write_uart_register(edge_port, LCR,
2739                                                         edge_port->shadowLCR);
2740         if (status != 0)
2741                 return;
2742
2743         /* set up the MCR register and send it to the EdgePort */
2744         edge_port->shadowMCR = MCR_MASTER_IE;
2745         if (cflag & CBAUD)
2746                 edge_port->shadowMCR |= (MCR_DTR | MCR_RTS);
2747
2748         status = send_cmd_write_uart_register(edge_port, MCR,
2749                                                 edge_port->shadowMCR);
2750         if (status != 0)
2751                 return;
2752
2753         /* Determine divisor based on baud rate */
2754         baud = tty_get_baud_rate(tty);
2755         if (!baud) {
2756                 /* pick a default, any default... */
2757                 baud = 9600;
2758         }
2759
2760         dbg("%s - baud rate = %d", __func__, baud);
2761         status = send_cmd_write_baud_rate(edge_port, baud);
2762         if (status == -1) {
2763                 /* Speed change was not possible - put back the old speed */
2764                 baud = tty_termios_baud_rate(old_termios);
2765                 tty_encode_baud_rate(tty, baud, baud);
2766         }
2767         return;
2768 }
2769
2770
2771 /****************************************************************************
2772  * unicode_to_ascii
2773  *      Turns a string from Unicode into ASCII.
2774  *      Doesn't do a good job with any characters that are outside the normal
2775  *      ASCII range, but it's only for debugging...
2776  *      NOTE: expects the unicode in LE format
2777  ****************************************************************************/
2778 static void unicode_to_ascii(char *string, int buflen,
2779                                         __le16 *unicode, int unicode_size)
2780 {
2781         int i;
2782
2783         if (buflen <= 0)        /* never happens, but... */
2784                 return;
2785         --buflen;               /* space for nul */
2786
2787         for (i = 0; i < unicode_size; i++) {
2788                 if (i >= buflen)
2789                         break;
2790                 string[i] = (char)(le16_to_cpu(unicode[i]));
2791         }
2792         string[i] = 0x00;
2793 }
2794
2795
2796 /****************************************************************************
2797  * get_manufacturing_desc
2798  *      reads in the manufacturing descriptor and stores it into the serial
2799  *      structure.
2800  ****************************************************************************/
2801 static void get_manufacturing_desc(struct edgeport_serial *edge_serial)
2802 {
2803         int response;
2804
2805         dbg("getting manufacturer descriptor");
2806
2807         response = rom_read(edge_serial->serial,
2808                                 (EDGE_MANUF_DESC_ADDR & 0xffff0000) >> 16,
2809                                 (__u16)(EDGE_MANUF_DESC_ADDR & 0x0000ffff),
2810                                 EDGE_MANUF_DESC_LEN,
2811                                 (__u8 *)(&edge_serial->manuf_descriptor));
2812
2813         if (response < 1)
2814                 dev_err(&edge_serial->serial->dev->dev,
2815                         "error in getting manufacturer descriptor\n");
2816         else {
2817                 char string[30];
2818                 dbg("**Manufacturer Descriptor");
2819                 dbg("  RomSize:        %dK",
2820                         edge_serial->manuf_descriptor.RomSize);
2821                 dbg("  RamSize:        %dK",
2822                         edge_serial->manuf_descriptor.RamSize);
2823                 dbg("  CpuRev:         %d",
2824                         edge_serial->manuf_descriptor.CpuRev);
2825                 dbg("  BoardRev:       %d",
2826                         edge_serial->manuf_descriptor.BoardRev);
2827                 dbg("  NumPorts:       %d",
2828                         edge_serial->manuf_descriptor.NumPorts);
2829                 dbg("  DescDate:       %d/%d/%d",
2830                         edge_serial->manuf_descriptor.DescDate[0],
2831                         edge_serial->manuf_descriptor.DescDate[1],
2832                         edge_serial->manuf_descriptor.DescDate[2]+1900);
2833                 unicode_to_ascii(string, sizeof(string),
2834                         edge_serial->manuf_descriptor.SerialNumber,
2835                         edge_serial->manuf_descriptor.SerNumLength/2);
2836                 dbg("  SerialNumber: %s", string);
2837                 unicode_to_ascii(string, sizeof(string),
2838                         edge_serial->manuf_descriptor.AssemblyNumber,
2839                         edge_serial->manuf_descriptor.AssemblyNumLength/2);
2840                 dbg("  AssemblyNumber: %s", string);
2841                 unicode_to_ascii(string, sizeof(string),
2842                     edge_serial->manuf_descriptor.OemAssyNumber,
2843                     edge_serial->manuf_descriptor.OemAssyNumLength/2);
2844                 dbg("  OemAssyNumber:  %s", string);
2845                 dbg("  UartType:       %d",
2846                         edge_serial->manuf_descriptor.UartType);
2847                 dbg("  IonPid:         %d",
2848                         edge_serial->manuf_descriptor.IonPid);
2849                 dbg("  IonConfig:      %d",
2850                         edge_serial->manuf_descriptor.IonConfig);
2851         }
2852 }
2853
2854
2855 /****************************************************************************
2856  * get_boot_desc
2857  *      reads in the bootloader descriptor and stores it into the serial
2858  *      structure.
2859  ****************************************************************************/
2860 static void get_boot_desc(struct edgeport_serial *edge_serial)
2861 {
2862         int response;
2863
2864         dbg("getting boot descriptor");
2865
2866         response = rom_read(edge_serial->serial,
2867                                 (EDGE_BOOT_DESC_ADDR & 0xffff0000) >> 16,
2868                                 (__u16)(EDGE_BOOT_DESC_ADDR & 0x0000ffff),
2869                                 EDGE_BOOT_DESC_LEN,
2870                                 (__u8 *)(&edge_serial->boot_descriptor));
2871
2872         if (response < 1)
2873                 dev_err(&edge_serial->serial->dev->dev,
2874                                 "error in getting boot descriptor\n");
2875         else {
2876                 dbg("**Boot Descriptor:");
2877                 dbg("  BootCodeLength: %d",
2878                     le16_to_cpu(edge_serial->boot_descriptor.BootCodeLength));
2879                 dbg("  MajorVersion:   %d",
2880                         edge_serial->boot_descriptor.MajorVersion);
2881                 dbg("  MinorVersion:   %d",
2882                         edge_serial->boot_descriptor.MinorVersion);
2883                 dbg("  BuildNumber:    %d",
2884                         le16_to_cpu(edge_serial->boot_descriptor.BuildNumber));
2885                 dbg("  Capabilities:   0x%x",
2886                       le16_to_cpu(edge_serial->boot_descriptor.Capabilities));
2887                 dbg("  UConfig0:       %d",
2888                         edge_serial->boot_descriptor.UConfig0);
2889                 dbg("  UConfig1:       %d",
2890                         edge_serial->boot_descriptor.UConfig1);
2891         }
2892 }
2893
2894
2895 /****************************************************************************
2896  * load_application_firmware
2897  *      This is called to load the application firmware to the device
2898  ****************************************************************************/
2899 static void load_application_firmware(struct edgeport_serial *edge_serial)
2900 {
2901         const struct ihex_binrec *rec;
2902         const struct firmware *fw;
2903         const char *fw_name;
2904         const char *fw_info;
2905         int response;
2906         __u32 Operaddr;
2907         __u16 build;
2908
2909         switch (edge_serial->product_info.iDownloadFile) {
2910                 case EDGE_DOWNLOAD_FILE_I930:
2911                         fw_info = "downloading firmware version (930)";
2912                         fw_name = "edgeport/down.fw";
2913                         break;
2914
2915                 case EDGE_DOWNLOAD_FILE_80251:
2916                         fw_info = "downloading firmware version (80251)";
2917                         fw_name = "edgeport/down2.fw";
2918                         break;
2919
2920                 case EDGE_DOWNLOAD_FILE_NONE:
2921                         dbg     ("No download file specified, skipping download\n");
2922                         return;
2923
2924                 default:
2925                         return;
2926         }
2927
2928         response = request_ihex_firmware(&fw, fw_name,
2929                                     &edge_serial->serial->dev->dev);
2930         if (response) {
2931                 printk(KERN_ERR "Failed to load image \"%s\" err %d\n",
2932                        fw_name, response);
2933                 return;
2934         }
2935
2936         rec = (const struct ihex_binrec *)fw->data;
2937         build = (rec->data[2] << 8) | rec->data[3];
2938
2939         dbg("%s %d.%d.%d", fw_info, rec->data[0], rec->data[1], build);
2940
2941         edge_serial->product_info.FirmwareMajorVersion = fw->data[0];
2942         edge_serial->product_info.FirmwareMinorVersion = fw->data[1];
2943         edge_serial->product_info.FirmwareBuildNumber = cpu_to_le16(build);
2944
2945         for (rec = ihex_next_binrec(rec); rec;
2946              rec = ihex_next_binrec(rec)) {
2947                 Operaddr = be32_to_cpu(rec->addr);
2948                 response = sram_write(edge_serial->serial,
2949                                      Operaddr >> 16,
2950                                      Operaddr & 0xFFFF,
2951                                      be16_to_cpu(rec->len),
2952                                      &rec->data[0]);
2953                 if (response < 0) {
2954                         dev_err(&edge_serial->serial->dev->dev,
2955                                 "sram_write failed (%x, %x, %d)\n",
2956                                 Operaddr >> 16, Operaddr & 0xFFFF,
2957                                 be16_to_cpu(rec->len));
2958                         break;
2959                 }
2960         }
2961
2962         dbg("sending exec_dl_code");
2963         response = usb_control_msg (edge_serial->serial->dev,
2964                                     usb_sndctrlpipe(edge_serial->serial->dev, 0),
2965                                     USB_REQUEST_ION_EXEC_DL_CODE,
2966                                     0x40, 0x4000, 0x0001, NULL, 0, 3000);
2967
2968         release_firmware(fw);
2969         return;
2970 }
2971
2972
2973 /****************************************************************************
2974  * edge_startup
2975  ****************************************************************************/
2976 static int edge_startup(struct usb_serial *serial)
2977 {
2978         struct edgeport_serial *edge_serial;
2979         struct edgeport_port *edge_port;
2980         struct usb_device *dev;
2981         int i, j;
2982         int response;
2983         bool interrupt_in_found;
2984         bool bulk_in_found;
2985         bool bulk_out_found;
2986         static __u32 descriptor[3] = {  EDGE_COMPATIBILITY_MASK0,
2987                                         EDGE_COMPATIBILITY_MASK1,
2988                                         EDGE_COMPATIBILITY_MASK2 };
2989
2990         dev = serial->dev;
2991
2992         /* create our private serial structure */
2993         edge_serial = kzalloc(sizeof(struct edgeport_serial), GFP_KERNEL);
2994         if (edge_serial == NULL) {
2995                 dev_err(&serial->dev->dev, "%s - Out of memory\n", __func__);
2996                 return -ENOMEM;
2997         }
2998         spin_lock_init(&edge_serial->es_lock);
2999         edge_serial->serial = serial;
3000         usb_set_serial_data(serial, edge_serial);
3001
3002         /* get the name for the device from the device */
3003         i = get_string(dev, dev->descriptor.iManufacturer,
3004             &edge_serial->name[0], MAX_NAME_LEN+1);
3005         edge_serial->name[i++] = ' ';
3006         get_string(dev, dev->descriptor.iProduct,
3007             &edge_serial->name[i], MAX_NAME_LEN+2 - i);
3008
3009         dev_info(&serial->dev->dev, "%s detected\n", edge_serial->name);
3010
3011         /* Read the epic descriptor */
3012         if (get_epic_descriptor(edge_serial) <= 0) {
3013                 /* memcpy descriptor to Supports structures */
3014                 memcpy(&edge_serial->epic_descriptor.Supports, descriptor,
3015                        sizeof(struct edge_compatibility_bits));
3016
3017                 /* get the manufacturing descriptor for this device */
3018                 get_manufacturing_desc(edge_serial);
3019
3020                 /* get the boot descriptor */
3021                 get_boot_desc(edge_serial);
3022
3023                 get_product_info(edge_serial);
3024         }
3025
3026         /* set the number of ports from the manufacturing description */
3027         /* serial->num_ports = serial->product_info.NumPorts; */
3028         if ((!edge_serial->is_epic) &&
3029             (edge_serial->product_info.NumPorts != serial->num_ports)) {
3030                 dev_warn(&serial->dev->dev, "Device Reported %d serial ports "
3031                          "vs. core thinking we have %d ports, email "
3032                          "greg@kroah.com this information.\n",
3033                          edge_serial->product_info.NumPorts,
3034                          serial->num_ports);
3035         }
3036
3037         dbg("%s - time 1 %ld", __func__, jiffies);
3038
3039         /* If not an EPiC device */
3040         if (!edge_serial->is_epic) {
3041                 /* now load the application firmware into this device */
3042                 load_application_firmware(edge_serial);
3043
3044                 dbg("%s - time 2 %ld", __func__, jiffies);
3045
3046                 /* Check current Edgeport EEPROM and update if necessary */
3047                 update_edgeport_E2PROM(edge_serial);
3048
3049                 dbg("%s - time 3 %ld", __func__, jiffies);
3050
3051                 /* set the configuration to use #1 */
3052 /*              dbg("set_configuration 1"); */
3053 /*              usb_set_configuration (dev, 1); */
3054         }
3055         dbg("  FirmwareMajorVersion  %d.%d.%d",
3056             edge_serial->product_info.FirmwareMajorVersion,
3057             edge_serial->product_info.FirmwareMinorVersion,
3058             le16_to_cpu(edge_serial->product_info.FirmwareBuildNumber));
3059
3060         /* we set up the pointers to the endpoints in the edge_open function,
3061          * as the structures aren't created yet. */
3062
3063         /* set up our port private structures */
3064         for (i = 0; i < serial->num_ports; ++i) {
3065                 edge_port = kmalloc(sizeof(struct edgeport_port), GFP_KERNEL);
3066                 if (edge_port == NULL) {
3067                         dev_err(&serial->dev->dev, "%s - Out of memory\n",
3068                                                                    __func__);
3069                         for (j = 0; j < i; ++j) {
3070                                 kfree(usb_get_serial_port_data(serial->port[j]));
3071                                 usb_set_serial_port_data(serial->port[j],
3072                                                                         NULL);
3073                         }
3074                         usb_set_serial_data(serial, NULL);
3075                         kfree(edge_serial);
3076                         return -ENOMEM;
3077                 }
3078                 memset(edge_port, 0, sizeof(struct edgeport_port));
3079                 spin_lock_init(&edge_port->ep_lock);
3080                 edge_port->port = serial->port[i];
3081                 usb_set_serial_port_data(serial->port[i], edge_port);
3082         }
3083
3084         response = 0;
3085
3086         if (edge_serial->is_epic) {
3087                 /* EPIC thing, set up our interrupt polling now and our read
3088                  * urb, so that the device knows it really is connected. */
3089                 interrupt_in_found = bulk_in_found = bulk_out_found = false;
3090                 for (i = 0; i < serial->interface->altsetting[0]
3091                                                 .desc.bNumEndpoints; ++i) {
3092                         struct usb_endpoint_descriptor *endpoint;
3093                         int buffer_size;
3094
3095                         endpoint = &serial->interface->altsetting[0].
3096                                                         endpoint[i].desc;
3097                         buffer_size = le16_to_cpu(endpoint->wMaxPacketSize);
3098                         if (!interrupt_in_found &&
3099                             (usb_endpoint_is_int_in(endpoint))) {
3100                                 /* we found a interrupt in endpoint */
3101                                 dbg("found interrupt in");
3102
3103                                 /* not set up yet, so do it now */
3104                                 edge_serial->interrupt_read_urb =
3105                                                 usb_alloc_urb(0, GFP_KERNEL);
3106                                 if (!edge_serial->interrupt_read_urb) {
3107                                         dev_err(&dev->dev, "out of memory\n");
3108                                         return -ENOMEM;
3109                                 }
3110                                 edge_serial->interrupt_in_buffer =
3111                                         kmalloc(buffer_size, GFP_KERNEL);
3112                                 if (!edge_serial->interrupt_in_buffer) {
3113                                         dev_err(&dev->dev, "out of memory\n");
3114                                         usb_free_urb(edge_serial->interrupt_read_urb);
3115                                         return -ENOMEM;
3116                                 }
3117                                 edge_serial->interrupt_in_endpoint =
3118                                                 endpoint->bEndpointAddress;
3119
3120                                 /* set up our interrupt urb */
3121                                 usb_fill_int_urb(
3122                                         edge_serial->interrupt_read_urb,
3123                                         dev,
3124                                         usb_rcvintpipe(dev,
3125                                                 endpoint->bEndpointAddress),
3126                                         edge_serial->interrupt_in_buffer,
3127                                         buffer_size,
3128                                         edge_interrupt_callback,
3129                                         edge_serial,
3130                                         endpoint->bInterval);
3131
3132                                 interrupt_in_found = true;
3133                         }
3134
3135                         if (!bulk_in_found &&
3136                                 (usb_endpoint_is_bulk_in(endpoint))) {
3137                                 /* we found a bulk in endpoint */
3138                                 dbg("found bulk in");
3139
3140                                 /* not set up yet, so do it now */
3141                                 edge_serial->read_urb =
3142                                                 usb_alloc_urb(0, GFP_KERNEL);
3143                                 if (!edge_serial->read_urb) {
3144                                         dev_err(&dev->dev, "out of memory\n");
3145                                         return -ENOMEM;
3146                                 }
3147                                 edge_serial->bulk_in_buffer =
3148                                         kmalloc(buffer_size, GFP_KERNEL);
3149                                 if (!edge_serial->bulk_in_buffer) {
3150                                         dev_err(&dev->dev, "out of memory\n");
3151                                         usb_free_urb(edge_serial->read_urb);
3152                                         return -ENOMEM;
3153                                 }
3154                                 edge_serial->bulk_in_endpoint =
3155                                                 endpoint->bEndpointAddress;
3156
3157                                 /* set up our bulk in urb */
3158                                 usb_fill_bulk_urb(edge_serial->read_urb, dev,
3159                                         usb_rcvbulkpipe(dev,
3160                                                 endpoint->bEndpointAddress),
3161                                         edge_serial->bulk_in_buffer,
3162                                         le16_to_cpu(endpoint->wMaxPacketSize),
3163                                         edge_bulk_in_callback,
3164                                         edge_serial);
3165                                 bulk_in_found = true;
3166                         }
3167
3168                         if (!bulk_out_found &&
3169                             (usb_endpoint_is_bulk_out(endpoint))) {
3170                                 /* we found a bulk out endpoint */
3171                                 dbg("found bulk out");
3172                                 edge_serial->bulk_out_endpoint =
3173                                                 endpoint->bEndpointAddress;
3174                                 bulk_out_found = true;
3175                         }
3176                 }
3177
3178                 if (!interrupt_in_found || !bulk_in_found || !bulk_out_found) {
3179                         dev_err(&dev->dev, "Error - the proper endpoints "
3180                                 "were not found!\n");
3181                         return -ENODEV;
3182                 }
3183
3184                 /* start interrupt read for this edgeport this interrupt will
3185                  * continue as long as the edgeport is connected */
3186                 response = usb_submit_urb(edge_serial->interrupt_read_urb,
3187                                                                 GFP_KERNEL);
3188                 if (response)
3189                         dev_err(&dev->dev,
3190                                 "%s - Error %d submitting control urb\n",
3191                                 __func__, response);
3192         }
3193         return response;
3194 }
3195
3196
3197 /****************************************************************************
3198  * edge_shutdown
3199  *      This function is called whenever the device is removed from the usb bus.
3200  ****************************************************************************/
3201 static void edge_shutdown(struct usb_serial *serial)
3202 {
3203         struct edgeport_serial *edge_serial = usb_get_serial_data(serial);
3204         int i;
3205
3206         dbg("%s", __func__);
3207
3208         /* stop reads and writes on all ports */
3209         for (i = 0; i < serial->num_ports; ++i) {
3210                 kfree(usb_get_serial_port_data(serial->port[i]));
3211                 usb_set_serial_port_data(serial->port[i],  NULL);
3212         }
3213         /* free up our endpoint stuff */
3214         if (edge_serial->is_epic) {
3215                 usb_kill_urb(edge_serial->interrupt_read_urb);
3216                 usb_free_urb(edge_serial->interrupt_read_urb);
3217                 kfree(edge_serial->interrupt_in_buffer);
3218
3219                 usb_kill_urb(edge_serial->read_urb);
3220                 usb_free_urb(edge_serial->read_urb);
3221                 kfree(edge_serial->bulk_in_buffer);
3222         }
3223
3224         kfree(edge_serial);
3225         usb_set_serial_data(serial, NULL);
3226 }
3227
3228
3229 /****************************************************************************
3230  * edgeport_init
3231  *      This is called by the module subsystem, or on startup to initialize us
3232  ****************************************************************************/
3233 static int __init edgeport_init(void)
3234 {
3235         int retval;
3236
3237         retval = usb_serial_register(&edgeport_2port_device);
3238         if (retval)
3239                 goto failed_2port_device_register;
3240         retval = usb_serial_register(&edgeport_4port_device);
3241         if (retval)
3242                 goto failed_4port_device_register;
3243         retval = usb_serial_register(&edgeport_8port_device);
3244         if (retval)
3245                 goto failed_8port_device_register;
3246         retval = usb_serial_register(&epic_device);
3247         if (retval)
3248                 goto failed_epic_device_register;
3249         retval = usb_register(&io_driver);
3250         if (retval)
3251                 goto failed_usb_register;
3252         atomic_set(&CmdUrbs, 0);
3253         printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_VERSION ":"
3254                DRIVER_DESC "\n");
3255         return 0;
3256
3257 failed_usb_register:
3258         usb_serial_deregister(&epic_device);
3259 failed_epic_device_register:
3260         usb_serial_deregister(&edgeport_8port_device);
3261 failed_8port_device_register:
3262         usb_serial_deregister(&edgeport_4port_device);
3263 failed_4port_device_register:
3264         usb_serial_deregister(&edgeport_2port_device);
3265 failed_2port_device_register:
3266         return retval;
3267 }
3268
3269
3270 /****************************************************************************
3271  * edgeport_exit
3272  *      Called when the driver is about to be unloaded.
3273  ****************************************************************************/
3274 static void __exit edgeport_exit (void)
3275 {
3276         usb_deregister(&io_driver);
3277         usb_serial_deregister(&edgeport_2port_device);
3278         usb_serial_deregister(&edgeport_4port_device);
3279         usb_serial_deregister(&edgeport_8port_device);
3280         usb_serial_deregister(&epic_device);
3281 }
3282
3283 module_init(edgeport_init);
3284 module_exit(edgeport_exit);
3285
3286 /* Module information */
3287 MODULE_AUTHOR(DRIVER_AUTHOR);
3288 MODULE_DESCRIPTION(DRIVER_DESC);
3289 MODULE_LICENSE("GPL");
3290 MODULE_FIRMWARE("edgeport/boot.fw");
3291 MODULE_FIRMWARE("edgeport/boot2.fw");
3292 MODULE_FIRMWARE("edgeport/down.fw");
3293 MODULE_FIRMWARE("edgeport/down2.fw");
3294
3295 module_param(debug, bool, S_IRUGO | S_IWUSR);
3296 MODULE_PARM_DESC(debug, "Debug enabled or not");