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