git.oblomov.eu Git - linux-2.6/blob - 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 usb_serial_port *port);
 211 static int edge_write(struct tty_struct *tty, struct usb_serial_port *port,
 212                                         const unsigned char *buf, int count);
 213 static int edge_write_room(struct tty_struct *tty);
 214 static int edge_chars_in_buffer(struct tty_struct *tty);
 215 static void edge_throttle(struct tty_struct *tty);
 216 static void edge_unthrottle(struct tty_struct *tty);
 217 static void edge_set_termios(struct tty_struct *tty,
 218                                         struct usb_serial_port *port,
 219                                         struct ktermios *old_termios);
 220 static int  edge_ioctl(struct tty_struct *tty, struct file *file,
 221                                         unsigned int cmd, unsigned long arg);
 222 static void edge_break(struct tty_struct *tty, int break_state);
 223 static int  edge_tiocmget(struct tty_struct *tty, struct file *file);
 224 static int  edge_tiocmset(struct tty_struct *tty, struct file *file,
 225                                         unsigned int set, unsigned int clear);
 226 static int  edge_startup(struct usb_serial *serial);
 227 static void edge_disconnect(struct usb_serial *serial);
 228 static void edge_release(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(port);
 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(port);
 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 usb_serial_port *port)
1103 {
1104         struct edgeport_serial *edge_serial;
1105         struct edgeport_port *edge_port;
1106         int status;
1107
1108         dbg("%s - port %d", __func__, port->number);
1109
1110         edge_serial = usb_get_serial_data(port->serial);
1111         edge_port = usb_get_serial_port_data(port);
1112         if (edge_serial == NULL || edge_port == NULL)
1113                 return;
1114
1115         /* block until tx is empty */
1116         block_until_tx_empty(edge_port);
1117
1118         edge_port->closePending = true;
1119
1120         if ((!edge_serial->is_epic) ||
1121             ((edge_serial->is_epic) &&
1122              (edge_serial->epic_descriptor.Supports.IOSPChase))) {
1123                 /* flush and chase */
1124                 edge_port->chaseResponsePending = true;
1125
1126                 dbg("%s - Sending IOSP_CMD_CHASE_PORT", __func__);
1127                 status = send_iosp_ext_cmd(edge_port, IOSP_CMD_CHASE_PORT, 0);
1128                 if (status == 0)
1129                         /* block until chase finished */
1130                         block_until_chase_response(edge_port);
1131                 else
1132                         edge_port->chaseResponsePending = false;
1133         }
1134
1135         if ((!edge_serial->is_epic) ||
1136             ((edge_serial->is_epic) &&
1137              (edge_serial->epic_descriptor.Supports.IOSPClose))) {
1138                /* close the port */
1139                 dbg("%s - Sending IOSP_CMD_CLOSE_PORT", __func__);
1140                 send_iosp_ext_cmd(edge_port, IOSP_CMD_CLOSE_PORT, 0);
1141         }
1142
1143         /* port->close = true; */
1144         edge_port->closePending = false;
1145         edge_port->open = false;
1146         edge_port->openPending = false;
1147
1148         usb_kill_urb(edge_port->write_urb);
1149
1150         if (edge_port->write_urb) {
1151                 /* if this urb had a transfer buffer already
1152                                 (old transfer) free it */
1153                 kfree(edge_port->write_urb->transfer_buffer);
1154                 usb_free_urb(edge_port->write_urb);
1155                 edge_port->write_urb = NULL;
1156         }
1157         kfree(edge_port->txfifo.fifo);
1158         edge_port->txfifo.fifo = NULL;
1159
1160         dbg("%s exited", __func__);
1161 }
1162
1163 /*****************************************************************************
1164  * SerialWrite
1165  *      this function is called by the tty driver when data should be written
1166  *      to the port.
1167  *      If successful, we return the number of bytes written, otherwise we
1168  *      return a negative error number.
1169  *****************************************************************************/
1170 static int edge_write(struct tty_struct *tty, struct usb_serial_port *port,
1171                                         const unsigned char *data, int count)
1172 {
1173         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1174         struct TxFifo *fifo;
1175         int copySize;
1176         int bytesleft;
1177         int firsthalf;
1178         int secondhalf;
1179         unsigned long flags;
1180
1181         dbg("%s - port %d", __func__, port->number);
1182
1183         if (edge_port == NULL)
1184                 return -ENODEV;
1185
1186         /* get a pointer to the Tx fifo */
1187         fifo = &edge_port->txfifo;
1188
1189         spin_lock_irqsave(&edge_port->ep_lock, flags);
1190
1191         /* calculate number of bytes to put in fifo */
1192         copySize = min((unsigned int)count,
1193                                 (edge_port->txCredits - fifo->count));
1194
1195         dbg("%s(%d) of %d byte(s) Fifo room  %d -- will copy %d bytes",
1196                         __func__, port->number, count,
1197                         edge_port->txCredits - fifo->count, copySize);
1198
1199         /* catch writes of 0 bytes which the tty driver likes to give us,
1200            and when txCredits is empty */
1201         if (copySize == 0) {
1202                 dbg("%s - copySize = Zero", __func__);
1203                 goto finish_write;
1204         }
1205
1206         /* queue the data
1207          * since we can never overflow the buffer we do not have to check for a
1208          * full condition
1209          *
1210          * the copy is done is two parts -- first fill to the end of the buffer
1211          * then copy the reset from the start of the buffer
1212          */
1213         bytesleft = fifo->size - fifo->head;
1214         firsthalf = min(bytesleft, copySize);
1215         dbg("%s - copy %d bytes of %d into fifo ", __func__,
1216                                         firsthalf, bytesleft);
1217
1218         /* now copy our data */
1219         memcpy(&fifo->fifo[fifo->head], data, firsthalf);
1220         usb_serial_debug_data(debug, &port->dev, __func__,
1221                                         firsthalf, &fifo->fifo[fifo->head]);
1222
1223         /* update the index and size */
1224         fifo->head  += firsthalf;
1225         fifo->count += firsthalf;
1226
1227         /* wrap the index */
1228         if (fifo->head == fifo->size)
1229                 fifo->head = 0;
1230
1231         secondhalf = copySize-firsthalf;
1232
1233         if (secondhalf) {
1234                 dbg("%s - copy rest of data %d", __func__, secondhalf);
1235                 memcpy(&fifo->fifo[fifo->head], &data[firsthalf], secondhalf);
1236                 usb_serial_debug_data(debug, &port->dev, __func__,
1237                                         secondhalf, &fifo->fifo[fifo->head]);
1238                 /* update the index and size */
1239                 fifo->count += secondhalf;
1240                 fifo->head  += secondhalf;
1241                 /* No need to check for wrap since we can not get to end of
1242                  * the fifo in this part
1243                  */
1244         }
1245
1246 finish_write:
1247         spin_unlock_irqrestore(&edge_port->ep_lock, flags);
1248
1249         send_more_port_data((struct edgeport_serial *)
1250                         usb_get_serial_data(port->serial), edge_port);
1251
1252         dbg("%s wrote %d byte(s) TxCredits %d, Fifo %d", __func__,
1253                                 copySize, edge_port->txCredits, fifo->count);
1254
1255         return copySize;
1256 }
1257
1258
1259 /************************************************************************
1260  *
1261  * send_more_port_data()
1262  *
1263  *      This routine attempts to write additional UART transmit data
1264  *      to a port over the USB bulk pipe. It is called (1) when new
1265  *      data has been written to a port's TxBuffer from higher layers
1266  *      (2) when the peripheral sends us additional TxCredits indicating
1267  *      that it can accept more Tx data for a given port; and (3) when
1268  *      a bulk write completes successfully and we want to see if we
1269  *      can transmit more.
1270  *
1271  ************************************************************************/
1272 static void send_more_port_data(struct edgeport_serial *edge_serial,
1273                                         struct edgeport_port *edge_port)
1274 {
1275         struct TxFifo   *fifo = &edge_port->txfifo;
1276         struct urb      *urb;
1277         unsigned char   *buffer;
1278         int             status;
1279         int             count;
1280         int             bytesleft;
1281         int             firsthalf;
1282         int             secondhalf;
1283         unsigned long   flags;
1284
1285         dbg("%s(%d)", __func__, edge_port->port->number);
1286
1287         spin_lock_irqsave(&edge_port->ep_lock, flags);
1288
1289         if (edge_port->write_in_progress ||
1290             !edge_port->open             ||
1291             (fifo->count == 0)) {
1292                 dbg("%s(%d) EXIT - fifo %d, PendingWrite = %d",
1293                                 __func__, edge_port->port->number,
1294                                 fifo->count, edge_port->write_in_progress);
1295                 goto exit_send;
1296         }
1297
1298         /* since the amount of data in the fifo will always fit into the
1299          * edgeport buffer we do not need to check the write length
1300          *
1301          * Do we have enough credits for this port to make it worthwhile
1302          * to bother queueing a write. If it's too small, say a few bytes,
1303          * it's better to wait for more credits so we can do a larger write.
1304          */
1305         if (edge_port->txCredits < EDGE_FW_GET_TX_CREDITS_SEND_THRESHOLD(edge_port->maxTxCredits, EDGE_FW_BULK_MAX_PACKET_SIZE)) {
1306                 dbg("%s(%d) Not enough credit - fifo %d TxCredit %d",
1307                         __func__, edge_port->port->number, fifo->count,
1308                         edge_port->txCredits);
1309                 goto exit_send;
1310         }
1311
1312         /* lock this write */
1313         edge_port->write_in_progress = true;
1314
1315         /* get a pointer to the write_urb */
1316         urb = edge_port->write_urb;
1317
1318         /* make sure transfer buffer is freed */
1319         kfree(urb->transfer_buffer);
1320         urb->transfer_buffer = NULL;
1321
1322         /* build the data header for the buffer and port that we are about
1323            to send out */
1324         count = fifo->count;
1325         buffer = kmalloc(count+2, GFP_ATOMIC);
1326         if (buffer == NULL) {
1327                 dev_err(&edge_port->port->dev,
1328                                 "%s - no more kernel memory...\n", __func__);
1329                 edge_port->write_in_progress = false;
1330                 goto exit_send;
1331         }
1332         buffer[0] = IOSP_BUILD_DATA_HDR1(edge_port->port->number
1333                                 - edge_port->port->serial->minor, count);
1334         buffer[1] = IOSP_BUILD_DATA_HDR2(edge_port->port->number
1335                                 - edge_port->port->serial->minor, count);
1336
1337         /* now copy our data */
1338         bytesleft =  fifo->size - fifo->tail;
1339         firsthalf = min(bytesleft, count);
1340         memcpy(&buffer[2], &fifo->fifo[fifo->tail], firsthalf);
1341         fifo->tail  += firsthalf;
1342         fifo->count -= firsthalf;
1343         if (fifo->tail == fifo->size)
1344                 fifo->tail = 0;
1345
1346         secondhalf = count-firsthalf;
1347         if (secondhalf) {
1348                 memcpy(&buffer[2+firsthalf], &fifo->fifo[fifo->tail],
1349                                                                 secondhalf);
1350                 fifo->tail  += secondhalf;
1351                 fifo->count -= secondhalf;
1352         }
1353
1354         if (count)
1355                 usb_serial_debug_data(debug, &edge_port->port->dev,
1356                                                 __func__, count, &buffer[2]);
1357
1358         /* fill up the urb with all of our data and submit it */
1359         usb_fill_bulk_urb(urb, edge_serial->serial->dev,
1360                         usb_sndbulkpipe(edge_serial->serial->dev,
1361                                         edge_serial->bulk_out_endpoint),
1362                         buffer, count+2,
1363                         edge_bulk_out_data_callback, edge_port);
1364
1365         /* decrement the number of credits we have by the number we just sent */
1366         edge_port->txCredits -= count;
1367         edge_port->icount.tx += count;
1368
1369         urb->dev = edge_serial->serial->dev;
1370         status = usb_submit_urb(urb, GFP_ATOMIC);
1371         if (status) {
1372                 /* something went wrong */
1373                 dev_err(&edge_port->port->dev,
1374                         "%s - usb_submit_urb(write bulk) failed, status = %d, data lost\n",
1375                                 __func__, status);
1376                 edge_port->write_in_progress = false;
1377
1378                 /* revert the credits as something bad happened. */
1379                 edge_port->txCredits += count;
1380                 edge_port->icount.tx -= count;
1381         }
1382         dbg("%s wrote %d byte(s) TxCredit %d, Fifo %d",
1383                         __func__, count, edge_port->txCredits, fifo->count);
1384
1385 exit_send:
1386         spin_unlock_irqrestore(&edge_port->ep_lock, flags);
1387 }
1388
1389
1390 /*****************************************************************************
1391  * edge_write_room
1392  *      this function is called by the tty driver when it wants to know how
1393  *      many bytes of data we can accept for a specific port. If successful,
1394  *      we return the amount of room that we have for this port (the txCredits)
1395  *      otherwise we return a negative error number.
1396  *****************************************************************************/
1397 static int edge_write_room(struct tty_struct *tty)
1398 {
1399         struct usb_serial_port *port = tty->driver_data;
1400         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1401         int room;
1402         unsigned long flags;
1403
1404         dbg("%s", __func__);
1405
1406         if (edge_port == NULL)
1407                 return 0;
1408         if (edge_port->closePending)
1409                 return 0;
1410
1411         dbg("%s - port %d", __func__, port->number);
1412
1413         if (!edge_port->open) {
1414                 dbg("%s - port not opened", __func__);
1415                 return 0;
1416         }
1417
1418         /* total of both buffers is still txCredit */
1419         spin_lock_irqsave(&edge_port->ep_lock, flags);
1420         room = edge_port->txCredits - edge_port->txfifo.count;
1421         spin_unlock_irqrestore(&edge_port->ep_lock, flags);
1422
1423         dbg("%s - returns %d", __func__, room);
1424         return room;
1425 }
1426
1427
1428 /*****************************************************************************
1429  * edge_chars_in_buffer
1430  *      this function is called by the tty driver when it wants to know how
1431  *      many bytes of data we currently have outstanding in the port (data that
1432  *      has been written, but hasn't made it out the port yet)
1433  *      If successful, we return the number of bytes left to be written in the
1434  *      system,
1435  *      Otherwise we return a negative error number.
1436  *****************************************************************************/
1437 static int edge_chars_in_buffer(struct tty_struct *tty)
1438 {
1439         struct usb_serial_port *port = tty->driver_data;
1440         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1441         int num_chars;
1442         unsigned long flags;
1443
1444         dbg("%s", __func__);
1445
1446         if (edge_port == NULL)
1447                 return 0;
1448         if (edge_port->closePending)
1449                 return 0;
1450
1451         if (!edge_port->open) {
1452                 dbg("%s - port not opened", __func__);
1453                 return 0;
1454         }
1455
1456         spin_lock_irqsave(&edge_port->ep_lock, flags);
1457         num_chars = edge_port->maxTxCredits - edge_port->txCredits +
1458                                                 edge_port->txfifo.count;
1459         spin_unlock_irqrestore(&edge_port->ep_lock, flags);
1460         if (num_chars) {
1461                 dbg("%s(port %d) - returns %d", __func__,
1462                                                 port->number, num_chars);
1463         }
1464
1465         return num_chars;
1466 }
1467
1468
1469 /*****************************************************************************
1470  * SerialThrottle
1471  *      this function is called by the tty driver when it wants to stop the data
1472  *      being read from the port.
1473  *****************************************************************************/
1474 static void edge_throttle(struct tty_struct *tty)
1475 {
1476         struct usb_serial_port *port = tty->driver_data;
1477         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1478         int status;
1479
1480         dbg("%s - port %d", __func__, port->number);
1481
1482         if (edge_port == NULL)
1483                 return;
1484
1485         if (!edge_port->open) {
1486                 dbg("%s - port not opened", __func__);
1487                 return;
1488         }
1489
1490         /* if we are implementing XON/XOFF, send the stop character */
1491         if (I_IXOFF(tty)) {
1492                 unsigned char stop_char = STOP_CHAR(tty);
1493                 status = edge_write(tty, port, &stop_char, 1);
1494                 if (status <= 0)
1495                         return;
1496         }
1497
1498         /* if we are implementing RTS/CTS, toggle that line */
1499         if (tty->termios->c_cflag & CRTSCTS) {
1500                 edge_port->shadowMCR &= ~MCR_RTS;
1501                 status = send_cmd_write_uart_register(edge_port, MCR,
1502                                                         edge_port->shadowMCR);
1503                 if (status != 0)
1504                         return;
1505         }
1506
1507         return;
1508 }
1509
1510
1511 /*****************************************************************************
1512  * edge_unthrottle
1513  *      this function is called by the tty driver when it wants to resume the
1514  *      data being read from the port (called after SerialThrottle is called)
1515  *****************************************************************************/
1516 static void edge_unthrottle(struct tty_struct *tty)
1517 {
1518         struct usb_serial_port *port = tty->driver_data;
1519         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1520         int status;
1521
1522         dbg("%s - port %d", __func__, port->number);
1523
1524         if (edge_port == NULL)
1525                 return;
1526
1527         if (!edge_port->open) {
1528                 dbg("%s - port not opened", __func__);
1529                 return;
1530         }
1531
1532         /* if we are implementing XON/XOFF, send the start character */
1533         if (I_IXOFF(tty)) {
1534                 unsigned char start_char = START_CHAR(tty);
1535                 status = edge_write(tty, port, &start_char, 1);
1536                 if (status <= 0)
1537                         return;
1538         }
1539         /* if we are implementing RTS/CTS, toggle that line */
1540         if (tty->termios->c_cflag & CRTSCTS) {
1541                 edge_port->shadowMCR |= MCR_RTS;
1542                 send_cmd_write_uart_register(edge_port, MCR,
1543                                                 edge_port->shadowMCR);
1544         }
1545 }
1546
1547
1548 /*****************************************************************************
1549  * SerialSetTermios
1550  *      this function is called by the tty driver when it wants to change
1551  * the termios structure
1552  *****************************************************************************/
1553 static void edge_set_termios(struct tty_struct *tty,
1554         struct usb_serial_port *port, struct ktermios *old_termios)
1555 {
1556         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1557         unsigned int cflag;
1558
1559         cflag = tty->termios->c_cflag;
1560         dbg("%s - clfag %08x iflag %08x", __func__,
1561             tty->termios->c_cflag, tty->termios->c_iflag);
1562         dbg("%s - old clfag %08x old iflag %08x", __func__,
1563             old_termios->c_cflag, old_termios->c_iflag);
1564
1565         dbg("%s - port %d", __func__, port->number);
1566
1567         if (edge_port == NULL)
1568                 return;
1569
1570         if (!edge_port->open) {
1571                 dbg("%s - port not opened", __func__);
1572                 return;
1573         }
1574
1575         /* change the port settings to the new ones specified */
1576         change_port_settings(tty, edge_port, old_termios);
1577 }
1578
1579
1580 /*****************************************************************************
1581  * get_lsr_info - get line status register info
1582  *
1583  * Purpose: Let user call ioctl() to get info when the UART physically
1584  *          is emptied.  On bus types like RS485, the transmitter must
1585  *          release the bus after transmitting. This must be done when
1586  *          the transmit shift register is empty, not be done when the
1587  *          transmit holding register is empty.  This functionality
1588  *          allows an RS485 driver to be written in user space.
1589  *****************************************************************************/
1590 static int get_lsr_info(struct edgeport_port *edge_port,
1591                                                 unsigned int __user *value)
1592 {
1593         unsigned int result = 0;
1594         unsigned long flags;
1595
1596         spin_lock_irqsave(&edge_port->ep_lock, flags);
1597         if (edge_port->maxTxCredits == edge_port->txCredits &&
1598             edge_port->txfifo.count == 0) {
1599                 dbg("%s -- Empty", __func__);
1600                 result = TIOCSER_TEMT;
1601         }
1602         spin_unlock_irqrestore(&edge_port->ep_lock, flags);
1603
1604         if (copy_to_user(value, &result, sizeof(int)))
1605                 return -EFAULT;
1606         return 0;
1607 }
1608
1609 static int edge_tiocmset(struct tty_struct *tty, struct file *file,
1610                                         unsigned int set, unsigned int clear)
1611 {
1612         struct usb_serial_port *port = tty->driver_data;
1613         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1614         unsigned int mcr;
1615
1616         dbg("%s - port %d", __func__, port->number);
1617
1618         mcr = edge_port->shadowMCR;
1619         if (set & TIOCM_RTS)
1620                 mcr |= MCR_RTS;
1621         if (set & TIOCM_DTR)
1622                 mcr |= MCR_DTR;
1623         if (set & TIOCM_LOOP)
1624                 mcr |= MCR_LOOPBACK;
1625
1626         if (clear & TIOCM_RTS)
1627                 mcr &= ~MCR_RTS;
1628         if (clear & TIOCM_DTR)
1629                 mcr &= ~MCR_DTR;
1630         if (clear & TIOCM_LOOP)
1631                 mcr &= ~MCR_LOOPBACK;
1632
1633         edge_port->shadowMCR = mcr;
1634
1635         send_cmd_write_uart_register(edge_port, MCR, edge_port->shadowMCR);
1636
1637         return 0;
1638 }
1639
1640 static int edge_tiocmget(struct tty_struct *tty, struct file *file)
1641 {
1642         struct usb_serial_port *port = tty->driver_data;
1643         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1644         unsigned int result = 0;
1645         unsigned int msr;
1646         unsigned int mcr;
1647
1648         dbg("%s - port %d", __func__, port->number);
1649
1650         msr = edge_port->shadowMSR;
1651         mcr = edge_port->shadowMCR;
1652         result = ((mcr & MCR_DTR)       ? TIOCM_DTR: 0)   /* 0x002 */
1653                   | ((mcr & MCR_RTS)    ? TIOCM_RTS: 0)   /* 0x004 */
1654                   | ((msr & EDGEPORT_MSR_CTS)   ? TIOCM_CTS: 0)   /* 0x020 */
1655                   | ((msr & EDGEPORT_MSR_CD)    ? TIOCM_CAR: 0)   /* 0x040 */
1656                   | ((msr & EDGEPORT_MSR_RI)    ? TIOCM_RI:  0)   /* 0x080 */
1657                   | ((msr & EDGEPORT_MSR_DSR)   ? TIOCM_DSR: 0);  /* 0x100 */
1658
1659
1660         dbg("%s -- %x", __func__, result);
1661
1662         return result;
1663 }
1664
1665 static int get_serial_info(struct edgeport_port *edge_port,
1666                                 struct serial_struct __user *retinfo)
1667 {
1668         struct serial_struct tmp;
1669
1670         if (!retinfo)
1671                 return -EFAULT;
1672
1673         memset(&tmp, 0, sizeof(tmp));
1674
1675         tmp.type                = PORT_16550A;
1676         tmp.line                = edge_port->port->serial->minor;
1677         tmp.port                = edge_port->port->number;
1678         tmp.irq                 = 0;
1679         tmp.flags               = ASYNC_SKIP_TEST | ASYNC_AUTO_IRQ;
1680         tmp.xmit_fifo_size      = edge_port->maxTxCredits;
1681         tmp.baud_base           = 9600;
1682         tmp.close_delay         = 5*HZ;
1683         tmp.closing_wait        = 30*HZ;
1684
1685         if (copy_to_user(retinfo, &tmp, sizeof(*retinfo)))
1686                 return -EFAULT;
1687         return 0;
1688 }
1689
1690
1691
1692 /*****************************************************************************
1693  * SerialIoctl
1694  *      this function handles any ioctl calls to the driver
1695  *****************************************************************************/
1696 static int edge_ioctl(struct tty_struct *tty, struct file *file,
1697                                         unsigned int cmd, unsigned long arg)
1698 {
1699         struct usb_serial_port *port = tty->driver_data;
1700         DEFINE_WAIT(wait);
1701         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1702         struct async_icount cnow;
1703         struct async_icount cprev;
1704         struct serial_icounter_struct icount;
1705
1706         dbg("%s - port %d, cmd = 0x%x", __func__, port->number, cmd);
1707
1708         switch (cmd) {
1709         case TIOCSERGETLSR:
1710                 dbg("%s (%d) TIOCSERGETLSR", __func__,  port->number);
1711                 return get_lsr_info(edge_port, (unsigned int __user *) arg);
1712
1713         case TIOCGSERIAL:
1714                 dbg("%s (%d) TIOCGSERIAL", __func__,  port->number);
1715                 return get_serial_info(edge_port, (struct serial_struct __user *) arg);
1716
1717         case TIOCMIWAIT:
1718                 dbg("%s (%d) TIOCMIWAIT", __func__,  port->number);
1719                 cprev = edge_port->icount;
1720                 while (1) {
1721                         prepare_to_wait(&edge_port->delta_msr_wait,
1722                                                 &wait, TASK_INTERRUPTIBLE);
1723                         schedule();
1724                         finish_wait(&edge_port->delta_msr_wait, &wait);
1725                         /* see if a signal did it */
1726                         if (signal_pending(current))
1727                                 return -ERESTARTSYS;
1728                         cnow = edge_port->icount;
1729                         if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr &&
1730                             cnow.dcd == cprev.dcd && cnow.cts == cprev.cts)
1731                                 return -EIO; /* no change => error */
1732                         if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
1733                             ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
1734                             ((arg & TIOCM_CD)  && (cnow.dcd != cprev.dcd)) ||
1735                             ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts))) {
1736                                 return 0;
1737                         }
1738                         cprev = cnow;
1739                 }
1740                 /* NOTREACHED */
1741                 break;
1742
1743         case TIOCGICOUNT:
1744                 cnow = edge_port->icount;
1745                 memset(&icount, 0, sizeof(icount));
1746                 icount.cts = cnow.cts;
1747                 icount.dsr = cnow.dsr;
1748                 icount.rng = cnow.rng;
1749                 icount.dcd = cnow.dcd;
1750                 icount.rx = cnow.rx;
1751                 icount.tx = cnow.tx;
1752                 icount.frame = cnow.frame;
1753                 icount.overrun = cnow.overrun;
1754                 icount.parity = cnow.parity;
1755                 icount.brk = cnow.brk;
1756                 icount.buf_overrun = cnow.buf_overrun;
1757
1758                 dbg("%s (%d) TIOCGICOUNT RX=%d, TX=%d",
1759                                 __func__,  port->number, icount.rx, icount.tx);
1760                 if (copy_to_user((void __user *)arg, &icount, sizeof(icount)))
1761                         return -EFAULT;
1762                 return 0;
1763         }
1764         return -ENOIOCTLCMD;
1765 }
1766
1767
1768 /*****************************************************************************
1769  * SerialBreak
1770  *      this function sends a break to the port
1771  *****************************************************************************/
1772 static void edge_break(struct tty_struct *tty, int break_state)
1773 {
1774         struct usb_serial_port *port = tty->driver_data;
1775         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1776         struct edgeport_serial *edge_serial = usb_get_serial_data(port->serial);
1777         int status;
1778
1779         if ((!edge_serial->is_epic) ||
1780             ((edge_serial->is_epic) &&
1781              (edge_serial->epic_descriptor.Supports.IOSPChase))) {
1782                 /* flush and chase */
1783                 edge_port->chaseResponsePending = true;
1784
1785                 dbg("%s - Sending IOSP_CMD_CHASE_PORT", __func__);
1786                 status = send_iosp_ext_cmd(edge_port, IOSP_CMD_CHASE_PORT, 0);
1787                 if (status == 0) {
1788                         /* block until chase finished */
1789                         block_until_chase_response(edge_port);
1790                 } else {
1791                         edge_port->chaseResponsePending = false;
1792                 }
1793         }
1794
1795         if ((!edge_serial->is_epic) ||
1796             ((edge_serial->is_epic) &&
1797              (edge_serial->epic_descriptor.Supports.IOSPSetClrBreak))) {
1798                 if (break_state == -1) {
1799                         dbg("%s - Sending IOSP_CMD_SET_BREAK", __func__);
1800                         status = send_iosp_ext_cmd(edge_port,
1801                                                 IOSP_CMD_SET_BREAK, 0);
1802                 } else {
1803                         dbg("%s - Sending IOSP_CMD_CLEAR_BREAK", __func__);
1804                         status = send_iosp_ext_cmd(edge_port,
1805                                                 IOSP_CMD_CLEAR_BREAK, 0);
1806                 }
1807                 if (status)
1808                         dbg("%s - error sending break set/clear command.",
1809                                 __func__);
1810         }
1811
1812         return;
1813 }
1814
1815
1816 /*****************************************************************************
1817  * process_rcvd_data
1818  *      this function handles the data received on the bulk in pipe.
1819  *****************************************************************************/
1820 static void process_rcvd_data(struct edgeport_serial *edge_serial,
1821                                 unsigned char *buffer, __u16 bufferLength)
1822 {
1823         struct usb_serial_port *port;
1824         struct edgeport_port *edge_port;
1825         struct tty_struct *tty;
1826         __u16 lastBufferLength;
1827         __u16 rxLen;
1828
1829         dbg("%s", __func__);
1830
1831         lastBufferLength = bufferLength + 1;
1832
1833         while (bufferLength > 0) {
1834                 /* failsafe incase we get a message that we don't understand */
1835                 if (lastBufferLength == bufferLength) {
1836                         dbg("%s - stuck in loop, exiting it.", __func__);
1837                         break;
1838                 }
1839                 lastBufferLength = bufferLength;
1840
1841                 switch (edge_serial->rxState) {
1842                 case EXPECT_HDR1:
1843                         edge_serial->rxHeader1 = *buffer;
1844                         ++buffer;
1845                         --bufferLength;
1846
1847                         if (bufferLength == 0) {
1848                                 edge_serial->rxState = EXPECT_HDR2;
1849                                 break;
1850                         }
1851                         /* otherwise, drop on through */
1852                 case EXPECT_HDR2:
1853                         edge_serial->rxHeader2 = *buffer;
1854                         ++buffer;
1855                         --bufferLength;
1856
1857                         dbg("%s - Hdr1=%02X Hdr2=%02X", __func__,
1858                             edge_serial->rxHeader1, edge_serial->rxHeader2);
1859                         /* Process depending on whether this header is
1860                          * data or status */
1861
1862                         if (IS_CMD_STAT_HDR(edge_serial->rxHeader1)) {
1863                                 /* Decode this status header and go to
1864                                  * EXPECT_HDR1 (if we can process the status
1865                                  * with only 2 bytes), or go to EXPECT_HDR3 to
1866                                  * get the third byte. */
1867                                 edge_serial->rxPort =
1868                                     IOSP_GET_HDR_PORT(edge_serial->rxHeader1);
1869                                 edge_serial->rxStatusCode =
1870                                     IOSP_GET_STATUS_CODE(
1871                                                 edge_serial->rxHeader1);
1872
1873                                 if (!IOSP_STATUS_IS_2BYTE(
1874                                                 edge_serial->rxStatusCode)) {
1875                                         /* This status needs additional bytes.
1876                                          * Save what we have and then wait for
1877                                          * more data.
1878                                          */
1879                                         edge_serial->rxStatusParam
1880                                                 = edge_serial->rxHeader2;
1881                                         edge_serial->rxState = EXPECT_HDR3;
1882                                         break;
1883                                 }
1884                                 /* We have all the header bytes, process the
1885                                    status now */
1886                                 process_rcvd_status(edge_serial,
1887                                                 edge_serial->rxHeader2, 0);
1888                                 edge_serial->rxState = EXPECT_HDR1;
1889                                 break;
1890                         } else {
1891                                 edge_serial->rxPort =
1892                                     IOSP_GET_HDR_PORT(edge_serial->rxHeader1);
1893                                 edge_serial->rxBytesRemaining =
1894                                     IOSP_GET_HDR_DATA_LEN(
1895                                                 edge_serial->rxHeader1,
1896                                                 edge_serial->rxHeader2);
1897                                 dbg("%s - Data for Port %u Len %u",
1898                                                 __func__,
1899                                                 edge_serial->rxPort,
1900                                                 edge_serial->rxBytesRemaining);
1901
1902                                 /* ASSERT(DevExt->RxPort < DevExt->NumPorts);
1903                                  * ASSERT(DevExt->RxBytesRemaining <
1904                                  *              IOSP_MAX_DATA_LENGTH);
1905                                  */
1906
1907                                 if (bufferLength == 0) {
1908                                         edge_serial->rxState = EXPECT_DATA;
1909                                         break;
1910                                 }
1911                                 /* Else, drop through */
1912                         }
1913                 case EXPECT_DATA: /* Expect data */
1914                         if (bufferLength < edge_serial->rxBytesRemaining) {
1915                                 rxLen = bufferLength;
1916                                 /* Expect data to start next buffer */
1917                                 edge_serial->rxState = EXPECT_DATA;
1918                         } else {
1919                                 /* BufLen >= RxBytesRemaining */
1920                                 rxLen = edge_serial->rxBytesRemaining;
1921                                 /* Start another header next time */
1922                                 edge_serial->rxState = EXPECT_HDR1;
1923                         }
1924
1925                         bufferLength -= rxLen;
1926                         edge_serial->rxBytesRemaining -= rxLen;
1927
1928                         /* spit this data back into the tty driver if this
1929                            port is open */
1930                         if (rxLen) {
1931                                 port = edge_serial->serial->port[
1932                                                         edge_serial->rxPort];
1933                                 edge_port = usb_get_serial_port_data(port);
1934                                 if (edge_port->open) {
1935                                         tty = tty_port_tty_get(
1936                                                 &edge_port->port->port);
1937                                         if (tty) {
1938                                                 dbg("%s - Sending %d bytes to TTY for port %d",
1939                                                         __func__, rxLen, edge_serial->rxPort);
1940                                                 edge_tty_recv(&edge_serial->serial->dev->dev, tty, buffer, rxLen);
1941                                                 tty_kref_put(tty);
1942                                         }
1943                                         edge_port->icount.rx += rxLen;
1944                                 }
1945                                 buffer += rxLen;
1946                         }
1947                         break;
1948
1949                 case EXPECT_HDR3:       /* Expect 3rd byte of status header */
1950                         edge_serial->rxHeader3 = *buffer;
1951                         ++buffer;
1952                         --bufferLength;
1953
1954                         /* We have all the header bytes, process the
1955                            status now */
1956                         process_rcvd_status(edge_serial,
1957                                 edge_serial->rxStatusParam,
1958                                 edge_serial->rxHeader3);
1959                         edge_serial->rxState = EXPECT_HDR1;
1960                         break;
1961                 }
1962         }
1963 }
1964
1965
1966 /*****************************************************************************
1967  * process_rcvd_status
1968  *      this function handles the any status messages received on the
1969  *      bulk in pipe.
1970  *****************************************************************************/
1971 static void process_rcvd_status(struct edgeport_serial *edge_serial,
1972                                                 __u8 byte2, __u8 byte3)
1973 {
1974         struct usb_serial_port *port;
1975         struct edgeport_port *edge_port;
1976         struct tty_struct *tty;
1977         __u8 code = edge_serial->rxStatusCode;
1978
1979         /* switch the port pointer to the one being currently talked about */
1980         port = edge_serial->serial->port[edge_serial->rxPort];
1981         edge_port = usb_get_serial_port_data(port);
1982         if (edge_port == NULL) {
1983                 dev_err(&edge_serial->serial->dev->dev,
1984                         "%s - edge_port == NULL for port %d\n",
1985                                         __func__, edge_serial->rxPort);
1986                 return;
1987         }
1988
1989         dbg("%s - port %d", __func__, edge_serial->rxPort);
1990
1991         if (code == IOSP_EXT_STATUS) {
1992                 switch (byte2) {
1993                 case IOSP_EXT_STATUS_CHASE_RSP:
1994                         /* we want to do EXT status regardless of port
1995                          * open/closed */
1996                         dbg("%s - Port %u EXT CHASE_RSP Data = %02x",
1997                                         __func__, edge_serial->rxPort, byte3);
1998                         /* Currently, the only EXT_STATUS is Chase, so process
1999                          * here instead of one more call to one more subroutine
2000                          * If/when more EXT_STATUS, there'll be more work to do
2001                          * Also, we currently clear flag and close the port
2002                          * regardless of content of above's Byte3.
2003                          * We could choose to do something else when Byte3 says
2004                          * Timeout on Chase from Edgeport, like wait longer in
2005                          * block_until_chase_response, but for now we don't.
2006                          */
2007                         edge_port->chaseResponsePending = false;
2008                         wake_up(&edge_port->wait_chase);
2009                         return;
2010
2011                 case IOSP_EXT_STATUS_RX_CHECK_RSP:
2012                         dbg("%s ========== Port %u CHECK_RSP Sequence = %02x =============\n", __func__, edge_serial->rxPort, byte3);
2013                         /* Port->RxCheckRsp = true; */
2014                         return;
2015                 }
2016         }
2017
2018         if (code == IOSP_STATUS_OPEN_RSP) {
2019                 edge_port->txCredits = GET_TX_BUFFER_SIZE(byte3);
2020                 edge_port->maxTxCredits = edge_port->txCredits;
2021                 dbg("%s - Port %u Open Response Inital MSR = %02x TxBufferSize = %d", __func__, edge_serial->rxPort, byte2, edge_port->txCredits);
2022                 handle_new_msr(edge_port, byte2);
2023
2024                 /* send the current line settings to the port so we are
2025                    in sync with any further termios calls */
2026                 tty = tty_port_tty_get(&edge_port->port->port);
2027                 if (tty) {
2028                         change_port_settings(tty,
2029                                 edge_port, tty->termios);
2030                         tty_kref_put(tty);
2031                 }
2032
2033                 /* we have completed the open */
2034                 edge_port->openPending = false;
2035                 edge_port->open = true;
2036                 wake_up(&edge_port->wait_open);
2037                 return;
2038         }
2039
2040         /* If port is closed, silently discard all rcvd status. We can
2041          * have cases where buffered status is received AFTER the close
2042          * port command is sent to the Edgeport.
2043          */
2044         if (!edge_port->open || edge_port->closePending)
2045                 return;
2046
2047         switch (code) {
2048         /* Not currently sent by Edgeport */
2049         case IOSP_STATUS_LSR:
2050                 dbg("%s - Port %u LSR Status = %02x",
2051                                         __func__, edge_serial->rxPort, byte2);
2052                 handle_new_lsr(edge_port, false, byte2, 0);
2053                 break;
2054
2055         case IOSP_STATUS_LSR_DATA:
2056                 dbg("%s - Port %u LSR Status = %02x, Data = %02x",
2057                                 __func__, edge_serial->rxPort, byte2, byte3);
2058                 /* byte2 is LSR Register */
2059                 /* byte3 is broken data byte */
2060                 handle_new_lsr(edge_port, true, byte2, byte3);
2061                 break;
2062         /*
2063          *      case IOSP_EXT_4_STATUS:
2064          *              dbg("%s - Port %u LSR Status = %02x Data = %02x",
2065          *                      __func__, edge_serial->rxPort, byte2, byte3);
2066          *              break;
2067          */
2068         case IOSP_STATUS_MSR:
2069                 dbg("%s - Port %u MSR Status = %02x",
2070                                         __func__, edge_serial->rxPort, byte2);
2071                 /*
2072                  * Process this new modem status and generate appropriate
2073                  * events, etc, based on the new status. This routine
2074                  * also saves the MSR in Port->ShadowMsr.
2075                  */
2076                 handle_new_msr(edge_port, byte2);
2077                 break;
2078
2079         default:
2080                 dbg("%s - Unrecognized IOSP status code %u\n", __func__, code);
2081                 break;
2082         }
2083         return;
2084 }
2085
2086
2087 /*****************************************************************************
2088  * edge_tty_recv
2089  *      this function passes data on to the tty flip buffer
2090  *****************************************************************************/
2091 static void edge_tty_recv(struct device *dev, struct tty_struct *tty,
2092                                         unsigned char *data, int length)
2093 {
2094         int cnt;
2095
2096         do {
2097                 cnt = tty_buffer_request_room(tty, length);
2098                 if (cnt < length) {
2099                         dev_err(dev, "%s - dropping data, %d bytes lost\n",
2100                                         __func__, length - cnt);
2101                         if (cnt == 0)
2102                                 break;
2103                 }
2104                 tty_insert_flip_string(tty, data, cnt);
2105                 data += cnt;
2106                 length -= cnt;
2107         } while (length > 0);
2108
2109         tty_flip_buffer_push(tty);
2110 }
2111
2112
2113 /*****************************************************************************
2114  * handle_new_msr
2115  *      this function handles any change to the msr register for a port.
2116  *****************************************************************************/
2117 static void handle_new_msr(struct edgeport_port *edge_port, __u8 newMsr)
2118 {
2119         struct  async_icount *icount;
2120
2121         dbg("%s %02x", __func__, newMsr);
2122
2123         if (newMsr & (EDGEPORT_MSR_DELTA_CTS | EDGEPORT_MSR_DELTA_DSR |
2124                         EDGEPORT_MSR_DELTA_RI | EDGEPORT_MSR_DELTA_CD)) {
2125                 icount = &edge_port->icount;
2126
2127                 /* update input line counters */
2128                 if (newMsr & EDGEPORT_MSR_DELTA_CTS)
2129                         icount->cts++;
2130                 if (newMsr & EDGEPORT_MSR_DELTA_DSR)
2131                         icount->dsr++;
2132                 if (newMsr & EDGEPORT_MSR_DELTA_CD)
2133                         icount->dcd++;
2134                 if (newMsr & EDGEPORT_MSR_DELTA_RI)
2135                         icount->rng++;
2136                 wake_up_interruptible(&edge_port->delta_msr_wait);
2137         }
2138
2139         /* Save the new modem status */
2140         edge_port->shadowMSR = newMsr & 0xf0;
2141
2142         return;
2143 }
2144
2145
2146 /*****************************************************************************
2147  * handle_new_lsr
2148  *      this function handles any change to the lsr register for a port.
2149  *****************************************************************************/
2150 static void handle_new_lsr(struct edgeport_port *edge_port, __u8 lsrData,
2151                                                         __u8 lsr, __u8 data)
2152 {
2153         __u8 newLsr = (__u8) (lsr & (__u8)
2154                 (LSR_OVER_ERR | LSR_PAR_ERR | LSR_FRM_ERR | LSR_BREAK));
2155         struct async_icount *icount;
2156
2157         dbg("%s - %02x", __func__, newLsr);
2158
2159         edge_port->shadowLSR = lsr;
2160
2161         if (newLsr & LSR_BREAK) {
2162                 /*
2163                  * Parity and Framing errors only count if they
2164                  * occur exclusive of a break being
2165                  * received.
2166                  */
2167                 newLsr &= (__u8)(LSR_OVER_ERR | LSR_BREAK);
2168         }
2169
2170         /* Place LSR data byte into Rx buffer */
2171         if (lsrData) {
2172                 struct tty_struct *tty =
2173                                 tty_port_tty_get(&edge_port->port->port);
2174                 if (tty) {
2175                         edge_tty_recv(&edge_port->port->dev, tty, &data, 1);
2176                         tty_kref_put(tty);
2177                 }
2178         }
2179         /* update input line counters */
2180         icount = &edge_port->icount;
2181         if (newLsr & LSR_BREAK)
2182                 icount->brk++;
2183         if (newLsr & LSR_OVER_ERR)
2184                 icount->overrun++;
2185         if (newLsr & LSR_PAR_ERR)
2186                 icount->parity++;
2187         if (newLsr & LSR_FRM_ERR)
2188                 icount->frame++;
2189
2190         return;
2191 }
2192
2193
2194 /****************************************************************************
2195  * sram_write
2196  *      writes a number of bytes to the Edgeport device's sram starting at the
2197  *      given address.
2198  *      If successful returns the number of bytes written, otherwise it returns
2199  *      a negative error number of the problem.
2200  ****************************************************************************/
2201 static int sram_write(struct usb_serial *serial, __u16 extAddr, __u16 addr,
2202                                         __u16 length, const __u8 *data)
2203 {
2204         int result;
2205         __u16 current_length;
2206         unsigned char *transfer_buffer;
2207
2208         dbg("%s - %x, %x, %d", __func__, extAddr, addr, length);
2209
2210         transfer_buffer =  kmalloc(64, GFP_KERNEL);
2211         if (!transfer_buffer) {
2212                 dev_err(&serial->dev->dev, "%s - kmalloc(%d) failed.\n",
2213                                                         __func__, 64);
2214                 return -ENOMEM;
2215         }
2216
2217         /* need to split these writes up into 64 byte chunks */
2218         result = 0;
2219         while (length > 0) {
2220                 if (length > 64)
2221                         current_length = 64;
2222                 else
2223                         current_length = length;
2224
2225 /*              dbg("%s - writing %x, %x, %d", __func__,
2226                                         extAddr, addr, current_length); */
2227                 memcpy(transfer_buffer, data, current_length);
2228                 result = usb_control_msg(serial->dev,
2229                                         usb_sndctrlpipe(serial->dev, 0),
2230                                         USB_REQUEST_ION_WRITE_RAM,
2231                                         0x40, addr, extAddr, transfer_buffer,
2232                                         current_length, 300);
2233                 if (result < 0)
2234                         break;
2235                 length -= current_length;
2236                 addr += current_length;
2237                 data += current_length;
2238         }
2239
2240         kfree(transfer_buffer);
2241         return result;
2242 }
2243
2244
2245 /****************************************************************************
2246  * rom_write
2247  *      writes a number of bytes to the Edgeport device's ROM starting at the
2248  *      given address.
2249  *      If successful returns the number of bytes written, otherwise it returns
2250  *      a negative error number of the problem.
2251  ****************************************************************************/
2252 static int rom_write(struct usb_serial *serial, __u16 extAddr, __u16 addr,
2253                                         __u16 length, const __u8 *data)
2254 {
2255         int result;
2256         __u16 current_length;
2257         unsigned char *transfer_buffer;
2258
2259 /*      dbg("%s - %x, %x, %d", __func__, extAddr, addr, length); */
2260
2261         transfer_buffer =  kmalloc(64, GFP_KERNEL);
2262         if (!transfer_buffer) {
2263                 dev_err(&serial->dev->dev, "%s - kmalloc(%d) failed.\n",
2264                                                                 __func__, 64);
2265                 return -ENOMEM;
2266         }
2267
2268         /* need to split these writes up into 64 byte chunks */
2269         result = 0;
2270         while (length > 0) {
2271                 if (length > 64)
2272                         current_length = 64;
2273                 else
2274                         current_length = length;
2275 /*              dbg("%s - writing %x, %x, %d", __func__,
2276                                         extAddr, addr, current_length); */
2277                 memcpy(transfer_buffer, data, current_length);
2278                 result = usb_control_msg(serial->dev,
2279                                         usb_sndctrlpipe(serial->dev, 0),
2280                                         USB_REQUEST_ION_WRITE_ROM, 0x40,
2281                                         addr, extAddr,
2282                                         transfer_buffer, current_length, 300);
2283                 if (result < 0)
2284                         break;
2285                 length -= current_length;
2286                 addr += current_length;
2287                 data += current_length;
2288         }
2289
2290         kfree(transfer_buffer);
2291         return result;
2292 }
2293
2294
2295 /****************************************************************************
2296  * rom_read
2297  *      reads a number of bytes from the Edgeport device starting at the given
2298  *      address.
2299  *      If successful returns the number of bytes read, otherwise it returns
2300  *      a negative error number of the problem.
2301  ****************************************************************************/
2302 static int rom_read(struct usb_serial *serial, __u16 extAddr,
2303                                         __u16 addr, __u16 length, __u8 *data)
2304 {
2305         int result;
2306         __u16 current_length;
2307         unsigned char *transfer_buffer;
2308
2309         dbg("%s - %x, %x, %d", __func__, extAddr, addr, length);
2310
2311         transfer_buffer =  kmalloc(64, GFP_KERNEL);
2312         if (!transfer_buffer) {
2313                 dev_err(&serial->dev->dev,
2314                         "%s - kmalloc(%d) failed.\n", __func__, 64);
2315                 return -ENOMEM;
2316         }
2317
2318         /* need to split these reads up into 64 byte chunks */
2319         result = 0;
2320         while (length > 0) {
2321                 if (length > 64)
2322                         current_length = 64;
2323                 else
2324                         current_length = length;
2325 /*              dbg("%s - %x, %x, %d", __func__,
2326                                 extAddr, addr, current_length); */
2327                 result = usb_control_msg(serial->dev,
2328                                         usb_rcvctrlpipe(serial->dev, 0),
2329                                         USB_REQUEST_ION_READ_ROM,
2330                                         0xC0, addr, extAddr, transfer_buffer,
2331                                         current_length, 300);
2332                 if (result < 0)
2333                         break;
2334                 memcpy(data, transfer_buffer, current_length);
2335                 length -= current_length;
2336                 addr += current_length;
2337                 data += current_length;
2338         }
2339
2340         kfree(transfer_buffer);
2341         return result;
2342 }
2343
2344
2345 /****************************************************************************
2346  * send_iosp_ext_cmd
2347  *      Is used to send a IOSP message to the Edgeport device
2348  ****************************************************************************/
2349 static int send_iosp_ext_cmd(struct edgeport_port *edge_port,
2350                                                 __u8 command, __u8 param)
2351 {
2352         unsigned char   *buffer;
2353         unsigned char   *currentCommand;
2354         int             length = 0;
2355         int             status = 0;
2356
2357         dbg("%s - %d, %d", __func__, command, param);
2358
2359         buffer = kmalloc(10, GFP_ATOMIC);
2360         if (!buffer) {
2361                 dev_err(&edge_port->port->dev,
2362                                 "%s - kmalloc(%d) failed.\n", __func__, 10);
2363                 return -ENOMEM;
2364         }
2365
2366         currentCommand = buffer;
2367
2368         MAKE_CMD_EXT_CMD(&currentCommand, &length,
2369                 edge_port->port->number - edge_port->port->serial->minor,
2370                 command, param);
2371
2372         status = write_cmd_usb(edge_port, buffer, length);
2373         if (status) {
2374                 /* something bad happened, let's free up the memory */
2375                 kfree(buffer);
2376         }
2377
2378         return status;
2379 }
2380
2381
2382 /*****************************************************************************
2383  * write_cmd_usb
2384  *      this function writes the given buffer out to the bulk write endpoint.
2385  *****************************************************************************/
2386 static int write_cmd_usb(struct edgeport_port *edge_port,
2387                                         unsigned char *buffer, int length)
2388 {
2389         struct edgeport_serial *edge_serial =
2390                                 usb_get_serial_data(edge_port->port->serial);
2391         int status = 0;
2392         struct urb *urb;
2393         int timeout;
2394
2395         usb_serial_debug_data(debug, &edge_port->port->dev,
2396                                                 __func__, length, buffer);
2397
2398         /* Allocate our next urb */
2399         urb = usb_alloc_urb(0, GFP_ATOMIC);
2400         if (!urb)
2401                 return -ENOMEM;
2402
2403         atomic_inc(&CmdUrbs);
2404         dbg("%s - ALLOCATE URB %p (outstanding %d)",
2405                                 __func__, urb, atomic_read(&CmdUrbs));
2406
2407         usb_fill_bulk_urb(urb, edge_serial->serial->dev,
2408                         usb_sndbulkpipe(edge_serial->serial->dev,
2409                                         edge_serial->bulk_out_endpoint),
2410                         buffer, length, edge_bulk_out_cmd_callback, edge_port);
2411
2412         edge_port->commandPending = true;
2413         status = usb_submit_urb(urb, GFP_ATOMIC);
2414
2415         if (status) {
2416                 /* something went wrong */
2417                 dev_err(&edge_port->port->dev,
2418                     "%s - usb_submit_urb(write command) failed, status = %d\n",
2419                                                         __func__, status);
2420                 usb_kill_urb(urb);
2421                 usb_free_urb(urb);
2422                 atomic_dec(&CmdUrbs);
2423                 return status;
2424         }
2425
2426         /* wait for command to finish */
2427         timeout = COMMAND_TIMEOUT;
2428 #if 0
2429         wait_event(&edge_port->wait_command, !edge_port->commandPending);
2430
2431         if (edge_port->commandPending) {
2432                 /* command timed out */
2433                 dbg("%s - command timed out", __func__);
2434                 status = -EINVAL;
2435         }
2436 #endif
2437         return status;
2438 }
2439
2440
2441 /*****************************************************************************
2442  * send_cmd_write_baud_rate
2443  *      this function sends the proper command to change the baud rate of the
2444  *      specified port.
2445  *****************************************************************************/
2446 static int send_cmd_write_baud_rate(struct edgeport_port *edge_port,
2447                                                                 int baudRate)
2448 {
2449         struct edgeport_serial *edge_serial =
2450                                 usb_get_serial_data(edge_port->port->serial);
2451         unsigned char *cmdBuffer;
2452         unsigned char *currCmd;
2453         int cmdLen = 0;
2454         int divisor;
2455         int status;
2456         unsigned char number =
2457                 edge_port->port->number - edge_port->port->serial->minor;
2458
2459         if (edge_serial->is_epic &&
2460             !edge_serial->epic_descriptor.Supports.IOSPSetBaudRate) {
2461                 dbg("SendCmdWriteBaudRate - NOT Setting baud rate for port = %d, baud = %d",
2462                     edge_port->port->number, baudRate);
2463                 return 0;
2464         }
2465
2466         dbg("%s - port = %d, baud = %d", __func__,
2467                                         edge_port->port->number, baudRate);
2468
2469         status = calc_baud_rate_divisor(baudRate, &divisor);
2470         if (status) {
2471                 dev_err(&edge_port->port->dev, "%s - bad baud rate\n",
2472                                                                 __func__);
2473                 return status;
2474         }
2475
2476         /* Alloc memory for the string of commands. */
2477         cmdBuffer =  kmalloc(0x100, GFP_ATOMIC);
2478         if (!cmdBuffer) {
2479                 dev_err(&edge_port->port->dev,
2480                         "%s - kmalloc(%d) failed.\n", __func__, 0x100);
2481                 return -ENOMEM;
2482         }
2483         currCmd = cmdBuffer;
2484
2485         /* Enable access to divisor latch */
2486         MAKE_CMD_WRITE_REG(&currCmd, &cmdLen, number, LCR, LCR_DL_ENABLE);
2487
2488         /* Write the divisor itself */
2489         MAKE_CMD_WRITE_REG(&currCmd, &cmdLen, number, DLL, LOW8(divisor));
2490         MAKE_CMD_WRITE_REG(&currCmd, &cmdLen, number, DLM, HIGH8(divisor));
2491
2492         /* Restore original value to disable access to divisor latch */
2493         MAKE_CMD_WRITE_REG(&currCmd, &cmdLen, number, LCR,
2494                                                 edge_port->shadowLCR);
2495
2496         status = write_cmd_usb(edge_port, cmdBuffer, cmdLen);
2497         if (status) {
2498                 /* something bad happened, let's free up the memory */
2499                 kfree(cmdBuffer);
2500         }
2501
2502         return status;
2503 }
2504
2505
2506 /*****************************************************************************
2507  * calc_baud_rate_divisor
2508  *      this function calculates the proper baud rate divisor for the specified
2509  *      baud rate.
2510  *****************************************************************************/
2511 static int calc_baud_rate_divisor(int baudrate, int *divisor)
2512 {
2513         int i;
2514         __u16 custom;
2515
2516
2517         dbg("%s - %d", __func__, baudrate);
2518
2519         for (i = 0; i < ARRAY_SIZE(divisor_table); i++) {
2520                 if (divisor_table[i].BaudRate == baudrate) {
2521                         *divisor = divisor_table[i].Divisor;
2522                         return 0;
2523                 }
2524         }
2525
2526         /* We have tried all of the standard baud rates
2527          * lets try to calculate the divisor for this baud rate
2528          * Make sure the baud rate is reasonable */
2529         if (baudrate > 50 && baudrate < 230400) {
2530                 /* get divisor */
2531                 custom = (__u16)((230400L + baudrate/2) / baudrate);
2532
2533                 *divisor = custom;
2534
2535                 dbg("%s - Baud %d = %d\n", __func__, baudrate, custom);
2536                 return 0;
2537         }
2538
2539         return -1;
2540 }
2541
2542
2543 /*****************************************************************************
2544  * send_cmd_write_uart_register
2545  *  this function builds up a uart register message and sends to to the device.
2546  *****************************************************************************/
2547 static int send_cmd_write_uart_register(struct edgeport_port *edge_port,
2548                                                 __u8 regNum, __u8 regValue)
2549 {
2550         struct edgeport_serial *edge_serial =
2551                                 usb_get_serial_data(edge_port->port->serial);
2552         unsigned char *cmdBuffer;
2553         unsigned char *currCmd;
2554         unsigned long cmdLen = 0;
2555         int status;
2556
2557         dbg("%s - write to %s register 0x%02x",
2558                         (regNum == MCR) ? "MCR" : "LCR", __func__, regValue);
2559
2560         if (edge_serial->is_epic &&
2561             !edge_serial->epic_descriptor.Supports.IOSPWriteMCR &&
2562             regNum == MCR) {
2563                 dbg("SendCmdWriteUartReg - Not writing to MCR Register");
2564                 return 0;
2565         }
2566
2567         if (edge_serial->is_epic &&
2568             !edge_serial->epic_descriptor.Supports.IOSPWriteLCR &&
2569             regNum == LCR) {
2570                 dbg("SendCmdWriteUartReg - Not writing to LCR Register");
2571                 return 0;
2572         }
2573
2574         /* Alloc memory for the string of commands. */
2575         cmdBuffer = kmalloc(0x10, GFP_ATOMIC);
2576         if (cmdBuffer == NULL)
2577                 return -ENOMEM;
2578
2579         currCmd = cmdBuffer;
2580
2581         /* Build a cmd in the buffer to write the given register */
2582         MAKE_CMD_WRITE_REG(&currCmd, &cmdLen,
2583                 edge_port->port->number - edge_port->port->serial->minor,
2584                 regNum, regValue);
2585
2586         status = write_cmd_usb(edge_port, cmdBuffer, cmdLen);
2587         if (status) {
2588                 /* something bad happened, let's free up the memory */
2589                 kfree(cmdBuffer);
2590         }
2591
2592         return status;
2593 }
2594
2595
2596 /*****************************************************************************
2597  * change_port_settings
2598  *      This routine is called to set the UART on the device to match the
2599  *      specified new settings.
2600  *****************************************************************************/
2601
2602 static void change_port_settings(struct tty_struct *tty,
2603         struct edgeport_port *edge_port, struct ktermios *old_termios)
2604 {
2605         struct edgeport_serial *edge_serial =
2606                         usb_get_serial_data(edge_port->port->serial);
2607         int baud;
2608         unsigned cflag;
2609         __u8 mask = 0xff;
2610         __u8 lData;
2611         __u8 lParity;
2612         __u8 lStop;
2613         __u8 rxFlow;
2614         __u8 txFlow;
2615         int status;
2616
2617         dbg("%s - port %d", __func__, edge_port->port->number);
2618
2619         if (!edge_port->open &&
2620             !edge_port->openPending) {
2621                 dbg("%s - port not opened", __func__);
2622                 return;
2623         }
2624
2625         cflag = tty->termios->c_cflag;
2626
2627         switch (cflag & CSIZE) {
2628         case CS5:
2629                 lData = LCR_BITS_5; mask = 0x1f;
2630                 dbg("%s - data bits = 5", __func__);
2631                 break;
2632         case CS6:
2633                 lData = LCR_BITS_6; mask = 0x3f;
2634                 dbg("%s - data bits = 6", __func__);
2635                 break;
2636         case CS7:
2637                 lData = LCR_BITS_7; mask = 0x7f;
2638                 dbg("%s - data bits = 7", __func__);
2639                 break;
2640         default:
2641         case CS8:
2642                 lData = LCR_BITS_8;
2643                 dbg("%s - data bits = 8", __func__);
2644                 break;
2645         }
2646
2647         lParity = LCR_PAR_NONE;
2648         if (cflag & PARENB) {
2649                 if (cflag & CMSPAR) {
2650                         if (cflag & PARODD) {
2651                                 lParity = LCR_PAR_MARK;
2652                                 dbg("%s - parity = mark", __func__);
2653                         } else {
2654                                 lParity = LCR_PAR_SPACE;
2655                                 dbg("%s - parity = space", __func__);
2656                         }
2657                 } else if (cflag & PARODD) {
2658                         lParity = LCR_PAR_ODD;
2659                         dbg("%s - parity = odd", __func__);
2660                 } else {
2661                         lParity = LCR_PAR_EVEN;
2662                         dbg("%s - parity = even", __func__);
2663                 }
2664         } else {
2665                 dbg("%s - parity = none", __func__);
2666         }
2667
2668         if (cflag & CSTOPB) {
2669                 lStop = LCR_STOP_2;
2670                 dbg("%s - stop bits = 2", __func__);
2671         } else {
2672                 lStop = LCR_STOP_1;
2673                 dbg("%s - stop bits = 1", __func__);
2674         }
2675
2676         /* figure out the flow control settings */
2677         rxFlow = txFlow = 0x00;
2678         if (cflag & CRTSCTS) {
2679                 rxFlow |= IOSP_RX_FLOW_RTS;
2680                 txFlow |= IOSP_TX_FLOW_CTS;
2681                 dbg("%s - RTS/CTS is enabled", __func__);
2682         } else {
2683                 dbg("%s - RTS/CTS is disabled", __func__);
2684         }
2685
2686         /* if we are implementing XON/XOFF, set the start and stop character
2687            in the device */
2688         if (I_IXOFF(tty) || I_IXON(tty)) {
2689                 unsigned char stop_char  = STOP_CHAR(tty);
2690                 unsigned char start_char = START_CHAR(tty);
2691
2692                 if ((!edge_serial->is_epic) ||
2693                     ((edge_serial->is_epic) &&
2694                      (edge_serial->epic_descriptor.Supports.IOSPSetXChar))) {
2695                         send_iosp_ext_cmd(edge_port,
2696                                         IOSP_CMD_SET_XON_CHAR, start_char);
2697                         send_iosp_ext_cmd(edge_port,
2698                                         IOSP_CMD_SET_XOFF_CHAR, stop_char);
2699                 }
2700
2701                 /* if we are implementing INBOUND XON/XOFF */
2702                 if (I_IXOFF(tty)) {
2703                         rxFlow |= IOSP_RX_FLOW_XON_XOFF;
2704                         dbg("%s - INBOUND XON/XOFF is enabled, XON = %2x, XOFF = %2x",
2705                                         __func__, start_char, stop_char);
2706                 } else {
2707                         dbg("%s - INBOUND XON/XOFF is disabled", __func__);
2708                 }
2709
2710                 /* if we are implementing OUTBOUND XON/XOFF */
2711                 if (I_IXON(tty)) {
2712                         txFlow |= IOSP_TX_FLOW_XON_XOFF;
2713                         dbg("%s - OUTBOUND XON/XOFF is enabled, XON = %2x, XOFF = %2x",
2714                                         __func__, start_char, stop_char);
2715                 } else {
2716                         dbg("%s - OUTBOUND XON/XOFF is disabled", __func__);
2717                 }
2718         }
2719
2720         /* Set flow control to the configured value */
2721         if ((!edge_serial->is_epic) ||
2722             ((edge_serial->is_epic) &&
2723              (edge_serial->epic_descriptor.Supports.IOSPSetRxFlow)))
2724                 send_iosp_ext_cmd(edge_port, IOSP_CMD_SET_RX_FLOW, rxFlow);
2725         if ((!edge_serial->is_epic) ||
2726             ((edge_serial->is_epic) &&
2727              (edge_serial->epic_descriptor.Supports.IOSPSetTxFlow)))
2728                 send_iosp_ext_cmd(edge_port, IOSP_CMD_SET_TX_FLOW, txFlow);
2729
2730
2731         edge_port->shadowLCR &= ~(LCR_BITS_MASK | LCR_STOP_MASK | LCR_PAR_MASK);
2732         edge_port->shadowLCR |= (lData | lParity | lStop);
2733
2734         edge_port->validDataMask = mask;
2735
2736         /* Send the updated LCR value to the EdgePort */
2737         status = send_cmd_write_uart_register(edge_port, LCR,
2738                                                         edge_port->shadowLCR);
2739         if (status != 0)
2740                 return;
2741
2742         /* set up the MCR register and send it to the EdgePort */
2743         edge_port->shadowMCR = MCR_MASTER_IE;
2744         if (cflag & CBAUD)
2745                 edge_port->shadowMCR |= (MCR_DTR | MCR_RTS);
2746
2747         status = send_cmd_write_uart_register(edge_port, MCR,
2748                                                 edge_port->shadowMCR);
2749         if (status != 0)
2750                 return;
2751
2752         /* Determine divisor based on baud rate */
2753         baud = tty_get_baud_rate(tty);
2754         if (!baud) {
2755                 /* pick a default, any default... */
2756                 baud = 9600;
2757         }
2758
2759         dbg("%s - baud rate = %d", __func__, baud);
2760         status = send_cmd_write_baud_rate(edge_port, baud);
2761         if (status == -1) {
2762                 /* Speed change was not possible - put back the old speed */
2763                 baud = tty_termios_baud_rate(old_termios);
2764                 tty_encode_baud_rate(tty, baud, baud);
2765         }
2766         return;
2767 }
2768
2769
2770 /****************************************************************************
2771  * unicode_to_ascii
2772  *      Turns a string from Unicode into ASCII.
2773  *      Doesn't do a good job with any characters that are outside the normal
2774  *      ASCII range, but it's only for debugging...
2775  *      NOTE: expects the unicode in LE format
2776  ****************************************************************************/
2777 static void unicode_to_ascii(char *string, int buflen,
2778                                         __le16 *unicode, int unicode_size)
2779 {
2780         int i;
2781
2782         if (buflen <= 0)        /* never happens, but... */
2783                 return;
2784         --buflen;               /* space for nul */
2785
2786         for (i = 0; i < unicode_size; i++) {
2787                 if (i >= buflen)
2788                         break;
2789                 string[i] = (char)(le16_to_cpu(unicode[i]));
2790         }
2791         string[i] = 0x00;
2792 }
2793
2794
2795 /****************************************************************************
2796  * get_manufacturing_desc
2797  *      reads in the manufacturing descriptor and stores it into the serial
2798  *      structure.
2799  ****************************************************************************/
2800 static void get_manufacturing_desc(struct edgeport_serial *edge_serial)
2801 {
2802         int response;
2803
2804         dbg("getting manufacturer descriptor");
2805
2806         response = rom_read(edge_serial->serial,
2807                                 (EDGE_MANUF_DESC_ADDR & 0xffff0000) >> 16,
2808                                 (__u16)(EDGE_MANUF_DESC_ADDR & 0x0000ffff),
2809                                 EDGE_MANUF_DESC_LEN,
2810                                 (__u8 *)(&edge_serial->manuf_descriptor));
2811
2812         if (response < 1)
2813                 dev_err(&edge_serial->serial->dev->dev,
2814                         "error in getting manufacturer descriptor\n");
2815         else {
2816                 char string[30];
2817                 dbg("**Manufacturer Descriptor");
2818                 dbg("  RomSize:        %dK",
2819                         edge_serial->manuf_descriptor.RomSize);
2820                 dbg("  RamSize:        %dK",
2821                         edge_serial->manuf_descriptor.RamSize);
2822                 dbg("  CpuRev:         %d",
2823                         edge_serial->manuf_descriptor.CpuRev);
2824                 dbg("  BoardRev:       %d",
2825                         edge_serial->manuf_descriptor.BoardRev);
2826                 dbg("  NumPorts:       %d",
2827                         edge_serial->manuf_descriptor.NumPorts);
2828                 dbg("  DescDate:       %d/%d/%d",
2829                         edge_serial->manuf_descriptor.DescDate[0],
2830                         edge_serial->manuf_descriptor.DescDate[1],
2831                         edge_serial->manuf_descriptor.DescDate[2]+1900);
2832                 unicode_to_ascii(string, sizeof(string),
2833                         edge_serial->manuf_descriptor.SerialNumber,
2834                         edge_serial->manuf_descriptor.SerNumLength/2);
2835                 dbg("  SerialNumber: %s", string);
2836                 unicode_to_ascii(string, sizeof(string),
2837                         edge_serial->manuf_descriptor.AssemblyNumber,
2838                         edge_serial->manuf_descriptor.AssemblyNumLength/2);
2839                 dbg("  AssemblyNumber: %s", string);
2840                 unicode_to_ascii(string, sizeof(string),
2841                     edge_serial->manuf_descriptor.OemAssyNumber,
2842                     edge_serial->manuf_descriptor.OemAssyNumLength/2);
2843                 dbg("  OemAssyNumber:  %s", string);
2844                 dbg("  UartType:       %d",
2845                         edge_serial->manuf_descriptor.UartType);
2846                 dbg("  IonPid:         %d",
2847                         edge_serial->manuf_descriptor.IonPid);
2848                 dbg("  IonConfig:      %d",
2849                         edge_serial->manuf_descriptor.IonConfig);
2850         }
2851 }
2852
2853
2854 /****************************************************************************
2855  * get_boot_desc
2856  *      reads in the bootloader descriptor and stores it into the serial
2857  *      structure.
2858  ****************************************************************************/
2859 static void get_boot_desc(struct edgeport_serial *edge_serial)
2860 {
2861         int response;
2862
2863         dbg("getting boot descriptor");
2864
2865         response = rom_read(edge_serial->serial,
2866                                 (EDGE_BOOT_DESC_ADDR & 0xffff0000) >> 16,
2867                                 (__u16)(EDGE_BOOT_DESC_ADDR & 0x0000ffff),
2868                                 EDGE_BOOT_DESC_LEN,
2869                                 (__u8 *)(&edge_serial->boot_descriptor));
2870
2871         if (response < 1)
2872                 dev_err(&edge_serial->serial->dev->dev,
2873                                 "error in getting boot descriptor\n");
2874         else {
2875                 dbg("**Boot Descriptor:");
2876                 dbg("  BootCodeLength: %d",
2877                     le16_to_cpu(edge_serial->boot_descriptor.BootCodeLength));
2878                 dbg("  MajorVersion:   %d",
2879                         edge_serial->boot_descriptor.MajorVersion);
2880                 dbg("  MinorVersion:   %d",
2881                         edge_serial->boot_descriptor.MinorVersion);
2882                 dbg("  BuildNumber:    %d",
2883                         le16_to_cpu(edge_serial->boot_descriptor.BuildNumber));
2884                 dbg("  Capabilities:   0x%x",
2885                       le16_to_cpu(edge_serial->boot_descriptor.Capabilities));
2886                 dbg("  UConfig0:       %d",
2887                         edge_serial->boot_descriptor.UConfig0);
2888                 dbg("  UConfig1:       %d",
2889                         edge_serial->boot_descriptor.UConfig1);
2890         }
2891 }
2892
2893
2894 /****************************************************************************
2895  * load_application_firmware
2896  *      This is called to load the application firmware to the device
2897  ****************************************************************************/
2898 static void load_application_firmware(struct edgeport_serial *edge_serial)
2899 {
2900         const struct ihex_binrec *rec;
2901         const struct firmware *fw;
2902         const char *fw_name;
2903         const char *fw_info;
2904         int response;
2905         __u32 Operaddr;
2906         __u16 build;
2907
2908         switch (edge_serial->product_info.iDownloadFile) {
2909                 case EDGE_DOWNLOAD_FILE_I930:
2910                         fw_info = "downloading firmware version (930)";
2911                         fw_name = "edgeport/down.fw";
2912                         break;
2913
2914                 case EDGE_DOWNLOAD_FILE_80251:
2915                         fw_info = "downloading firmware version (80251)";
2916                         fw_name = "edgeport/down2.fw";
2917                         break;
2918
2919                 case EDGE_DOWNLOAD_FILE_NONE:
2920                         dbg     ("No download file specified, skipping download\n");
2921                         return;
2922
2923                 default:
2924                         return;
2925         }
2926
2927         response = request_ihex_firmware(&fw, fw_name,
2928                                     &edge_serial->serial->dev->dev);
2929         if (response) {
2930                 printk(KERN_ERR "Failed to load image \"%s\" err %d\n",
2931                        fw_name, response);
2932                 return;
2933         }
2934
2935         rec = (const struct ihex_binrec *)fw->data;
2936         build = (rec->data[2] << 8) | rec->data[3];
2937
2938         dbg("%s %d.%d.%d", fw_info, rec->data[0], rec->data[1], build);
2939
2940         edge_serial->product_info.FirmwareMajorVersion = fw->data[0];
2941         edge_serial->product_info.FirmwareMinorVersion = fw->data[1];
2942         edge_serial->product_info.FirmwareBuildNumber = cpu_to_le16(build);
2943
2944         for (rec = ihex_next_binrec(rec); rec;
2945              rec = ihex_next_binrec(rec)) {
2946                 Operaddr = be32_to_cpu(rec->addr);
2947                 response = sram_write(edge_serial->serial,
2948                                      Operaddr >> 16,
2949                                      Operaddr & 0xFFFF,
2950                                      be16_to_cpu(rec->len),
2951                                      &rec->data[0]);
2952                 if (response < 0) {
2953                         dev_err(&edge_serial->serial->dev->dev,
2954                                 "sram_write failed (%x, %x, %d)\n",
2955                                 Operaddr >> 16, Operaddr & 0xFFFF,
2956                                 be16_to_cpu(rec->len));
2957                         break;
2958                 }
2959         }
2960
2961         dbg("sending exec_dl_code");
2962         response = usb_control_msg (edge_serial->serial->dev,
2963                                     usb_sndctrlpipe(edge_serial->serial->dev, 0),
2964                                     USB_REQUEST_ION_EXEC_DL_CODE,
2965                                     0x40, 0x4000, 0x0001, NULL, 0, 3000);
2966
2967         release_firmware(fw);
2968         return;
2969 }
2970
2971
2972 /****************************************************************************
2973  * edge_startup
2974  ****************************************************************************/
2975 static int edge_startup(struct usb_serial *serial)
2976 {
2977         struct edgeport_serial *edge_serial;
2978         struct edgeport_port *edge_port;
2979         struct usb_device *dev;
2980         int i, j;
2981         int response;
2982         bool interrupt_in_found;
2983         bool bulk_in_found;
2984         bool bulk_out_found;
2985         static __u32 descriptor[3] = {  EDGE_COMPATIBILITY_MASK0,
2986                                         EDGE_COMPATIBILITY_MASK1,
2987                                         EDGE_COMPATIBILITY_MASK2 };
2988
2989         dev = serial->dev;
2990
2991         /* create our private serial structure */
2992         edge_serial = kzalloc(sizeof(struct edgeport_serial), GFP_KERNEL);
2993         if (edge_serial == NULL) {
2994                 dev_err(&serial->dev->dev, "%s - Out of memory\n", __func__);
2995                 return -ENOMEM;
2996         }
2997         spin_lock_init(&edge_serial->es_lock);
2998         edge_serial->serial = serial;
2999         usb_set_serial_data(serial, edge_serial);
3000
3001         /* get the name for the device from the device */
3002         i = get_string(dev, dev->descriptor.iManufacturer,
3003             &edge_serial->name[0], MAX_NAME_LEN+1);
3004         edge_serial->name[i++] = ' ';
3005         get_string(dev, dev->descriptor.iProduct,
3006             &edge_serial->name[i], MAX_NAME_LEN+2 - i);
3007
3008         dev_info(&serial->dev->dev, "%s detected\n", edge_serial->name);
3009
3010         /* Read the epic descriptor */
3011         if (get_epic_descriptor(edge_serial) <= 0) {
3012                 /* memcpy descriptor to Supports structures */
3013                 memcpy(&edge_serial->epic_descriptor.Supports, descriptor,
3014                        sizeof(struct edge_compatibility_bits));
3015
3016                 /* get the manufacturing descriptor for this device */
3017                 get_manufacturing_desc(edge_serial);
3018
3019                 /* get the boot descriptor */
3020                 get_boot_desc(edge_serial);
3021
3022                 get_product_info(edge_serial);
3023         }
3024
3025         /* set the number of ports from the manufacturing description */
3026         /* serial->num_ports = serial->product_info.NumPorts; */
3027         if ((!edge_serial->is_epic) &&
3028             (edge_serial->product_info.NumPorts != serial->num_ports)) {
3029                 dev_warn(&serial->dev->dev, "Device Reported %d serial ports "
3030                          "vs. core thinking we have %d ports, email "
3031                          "greg@kroah.com this information.\n",
3032                          edge_serial->product_info.NumPorts,
3033                          serial->num_ports);
3034         }
3035
3036         dbg("%s - time 1 %ld", __func__, jiffies);
3037
3038         /* If not an EPiC device */
3039         if (!edge_serial->is_epic) {
3040                 /* now load the application firmware into this device */
3041                 load_application_firmware(edge_serial);
3042
3043                 dbg("%s - time 2 %ld", __func__, jiffies);
3044
3045                 /* Check current Edgeport EEPROM and update if necessary */
3046                 update_edgeport_E2PROM(edge_serial);
3047
3048                 dbg("%s - time 3 %ld", __func__, jiffies);
3049
3050                 /* set the configuration to use #1 */
3051 /*              dbg("set_configuration 1"); */
3052 /*              usb_set_configuration (dev, 1); */
3053         }
3054         dbg("  FirmwareMajorVersion  %d.%d.%d",
3055             edge_serial->product_info.FirmwareMajorVersion,
3056             edge_serial->product_info.FirmwareMinorVersion,
3057             le16_to_cpu(edge_serial->product_info.FirmwareBuildNumber));
3058
3059         /* we set up the pointers to the endpoints in the edge_open function,
3060          * as the structures aren't created yet. */
3061
3062         /* set up our port private structures */
3063         for (i = 0; i < serial->num_ports; ++i) {
3064                 edge_port = kmalloc(sizeof(struct edgeport_port), GFP_KERNEL);
3065                 if (edge_port == NULL) {
3066                         dev_err(&serial->dev->dev, "%s - Out of memory\n",
3067                                                                    __func__);
3068                         for (j = 0; j < i; ++j) {
3069                                 kfree(usb_get_serial_port_data(serial->port[j]));
3070                                 usb_set_serial_port_data(serial->port[j],
3071                                                                         NULL);
3072                         }
3073                         usb_set_serial_data(serial, NULL);
3074                         kfree(edge_serial);
3075                         return -ENOMEM;
3076                 }
3077                 memset(edge_port, 0, sizeof(struct edgeport_port));
3078                 spin_lock_init(&edge_port->ep_lock);
3079                 edge_port->port = serial->port[i];
3080                 usb_set_serial_port_data(serial->port[i], edge_port);
3081         }
3082
3083         response = 0;
3084
3085         if (edge_serial->is_epic) {
3086                 /* EPIC thing, set up our interrupt polling now and our read
3087                  * urb, so that the device knows it really is connected. */
3088                 interrupt_in_found = bulk_in_found = bulk_out_found = false;
3089                 for (i = 0; i < serial->interface->altsetting[0]
3090                                                 .desc.bNumEndpoints; ++i) {
3091                         struct usb_endpoint_descriptor *endpoint;
3092                         int buffer_size;
3093
3094                         endpoint = &serial->interface->altsetting[0].
3095                                                         endpoint[i].desc;
3096                         buffer_size = le16_to_cpu(endpoint->wMaxPacketSize);
3097                         if (!interrupt_in_found &&
3098                             (usb_endpoint_is_int_in(endpoint))) {
3099                                 /* we found a interrupt in endpoint */
3100                                 dbg("found interrupt in");
3101
3102                                 /* not set up yet, so do it now */
3103                                 edge_serial->interrupt_read_urb =
3104                                                 usb_alloc_urb(0, GFP_KERNEL);
3105                                 if (!edge_serial->interrupt_read_urb) {
3106                                         dev_err(&dev->dev, "out of memory\n");
3107                                         return -ENOMEM;
3108                                 }
3109                                 edge_serial->interrupt_in_buffer =
3110                                         kmalloc(buffer_size, GFP_KERNEL);
3111                                 if (!edge_serial->interrupt_in_buffer) {
3112                                         dev_err(&dev->dev, "out of memory\n");
3113                                         usb_free_urb(edge_serial->interrupt_read_urb);
3114                                         return -ENOMEM;
3115                                 }
3116                                 edge_serial->interrupt_in_endpoint =
3117                                                 endpoint->bEndpointAddress;
3118
3119                                 /* set up our interrupt urb */
3120                                 usb_fill_int_urb(
3121                                         edge_serial->interrupt_read_urb,
3122                                         dev,
3123                                         usb_rcvintpipe(dev,
3124                                                 endpoint->bEndpointAddress),
3125                                         edge_serial->interrupt_in_buffer,
3126                                         buffer_size,
3127                                         edge_interrupt_callback,
3128                                         edge_serial,
3129                                         endpoint->bInterval);
3130
3131                                 interrupt_in_found = true;
3132                         }
3133
3134                         if (!bulk_in_found &&
3135                                 (usb_endpoint_is_bulk_in(endpoint))) {
3136                                 /* we found a bulk in endpoint */
3137                                 dbg("found bulk in");
3138
3139                                 /* not set up yet, so do it now */
3140                                 edge_serial->read_urb =
3141                                                 usb_alloc_urb(0, GFP_KERNEL);
3142                                 if (!edge_serial->read_urb) {
3143                                         dev_err(&dev->dev, "out of memory\n");
3144                                         return -ENOMEM;
3145                                 }
3146                                 edge_serial->bulk_in_buffer =
3147                                         kmalloc(buffer_size, GFP_KERNEL);
3148                                 if (!edge_serial->bulk_in_buffer) {
3149                                         dev_err(&dev->dev, "out of memory\n");
3150                                         usb_free_urb(edge_serial->read_urb);
3151                                         return -ENOMEM;
3152                                 }
3153                                 edge_serial->bulk_in_endpoint =
3154                                                 endpoint->bEndpointAddress;
3155
3156                                 /* set up our bulk in urb */
3157                                 usb_fill_bulk_urb(edge_serial->read_urb, dev,
3158                                         usb_rcvbulkpipe(dev,
3159                                                 endpoint->bEndpointAddress),
3160                                         edge_serial->bulk_in_buffer,
3161                                         le16_to_cpu(endpoint->wMaxPacketSize),
3162                                         edge_bulk_in_callback,
3163                                         edge_serial);
3164                                 bulk_in_found = true;
3165                         }
3166
3167                         if (!bulk_out_found &&
3168                             (usb_endpoint_is_bulk_out(endpoint))) {
3169                                 /* we found a bulk out endpoint */
3170                                 dbg("found bulk out");
3171                                 edge_serial->bulk_out_endpoint =
3172                                                 endpoint->bEndpointAddress;
3173                                 bulk_out_found = true;
3174                         }
3175                 }
3176
3177                 if (!interrupt_in_found || !bulk_in_found || !bulk_out_found) {
3178                         dev_err(&dev->dev, "Error - the proper endpoints "
3179                                 "were not found!\n");
3180                         return -ENODEV;
3181                 }
3182
3183                 /* start interrupt read for this edgeport this interrupt will
3184                  * continue as long as the edgeport is connected */
3185                 response = usb_submit_urb(edge_serial->interrupt_read_urb,
3186                                                                 GFP_KERNEL);
3187                 if (response)
3188                         dev_err(&dev->dev,
3189                                 "%s - Error %d submitting control urb\n",
3190                                 __func__, response);
3191         }
3192         return response;
3193 }
3194
3195
3196 /****************************************************************************
3197  * edge_disconnect
3198  *      This function is called whenever the device is removed from the usb bus.
3199  ****************************************************************************/
3200 static void edge_disconnect(struct usb_serial *serial)
3201 {
3202         struct edgeport_serial *edge_serial = usb_get_serial_data(serial);
3203
3204         dbg("%s", __func__);
3205
3206         /* stop reads and writes on all ports */
3207         /* free up our endpoint stuff */
3208         if (edge_serial->is_epic) {
3209                 usb_kill_urb(edge_serial->interrupt_read_urb);
3210                 usb_free_urb(edge_serial->interrupt_read_urb);
3211                 kfree(edge_serial->interrupt_in_buffer);
3212
3213                 usb_kill_urb(edge_serial->read_urb);
3214                 usb_free_urb(edge_serial->read_urb);
3215                 kfree(edge_serial->bulk_in_buffer);
3216         }
3217 }
3218
3219
3220 /****************************************************************************
3221  * edge_release
3222  *      This function is called when the device structure is deallocated.
3223  ****************************************************************************/
3224 static void edge_release(struct usb_serial *serial)
3225 {
3226         struct edgeport_serial *edge_serial = usb_get_serial_data(serial);
3227         int i;
3228
3229         dbg("%s", __func__);
3230
3231         for (i = 0; i < serial->num_ports; ++i)
3232                 kfree(usb_get_serial_port_data(serial->port[i]));
3233
3234         kfree(edge_serial);
3235 }
3236
3237
3238 /****************************************************************************
3239  * edgeport_init
3240  *      This is called by the module subsystem, or on startup to initialize us
3241  ****************************************************************************/
3242 static int __init edgeport_init(void)
3243 {
3244         int retval;
3245
3246         retval = usb_serial_register(&edgeport_2port_device);
3247         if (retval)
3248                 goto failed_2port_device_register;
3249         retval = usb_serial_register(&edgeport_4port_device);
3250         if (retval)
3251                 goto failed_4port_device_register;
3252         retval = usb_serial_register(&edgeport_8port_device);
3253         if (retval)
3254                 goto failed_8port_device_register;
3255         retval = usb_serial_register(&epic_device);
3256         if (retval)
3257                 goto failed_epic_device_register;
3258         retval = usb_register(&io_driver);
3259         if (retval)
3260                 goto failed_usb_register;
3261         atomic_set(&CmdUrbs, 0);
3262         printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_VERSION ":"
3263                DRIVER_DESC "\n");
3264         return 0;
3265
3266 failed_usb_register:
3267         usb_serial_deregister(&epic_device);
3268 failed_epic_device_register:
3269         usb_serial_deregister(&edgeport_8port_device);
3270 failed_8port_device_register:
3271         usb_serial_deregister(&edgeport_4port_device);
3272 failed_4port_device_register:
3273         usb_serial_deregister(&edgeport_2port_device);
3274 failed_2port_device_register:
3275         return retval;
3276 }
3277
3278
3279 /****************************************************************************
3280  * edgeport_exit
3281  *      Called when the driver is about to be unloaded.
3282  ****************************************************************************/
3283 static void __exit edgeport_exit (void)
3284 {
3285         usb_deregister(&io_driver);
3286         usb_serial_deregister(&edgeport_2port_device);
3287         usb_serial_deregister(&edgeport_4port_device);
3288         usb_serial_deregister(&edgeport_8port_device);
3289         usb_serial_deregister(&epic_device);
3290 }
3291
3292 module_init(edgeport_init);
3293 module_exit(edgeport_exit);
3294
3295 /* Module information */
3296 MODULE_AUTHOR(DRIVER_AUTHOR);
3297 MODULE_DESCRIPTION(DRIVER_DESC);
3298 MODULE_LICENSE("GPL");
3299 MODULE_FIRMWARE("edgeport/boot.fw");
3300 MODULE_FIRMWARE("edgeport/boot2.fw");
3301 MODULE_FIRMWARE("edgeport/down.fw");
3302 MODULE_FIRMWARE("edgeport/down2.fw");
3303
3304 module_param(debug, bool, S_IRUGO | S_IWUSR);
3305 MODULE_PARM_DESC(debug, "Debug enabled or not");