Pileus Git - ~andy/linux/blob - drivers/usb/serial/io_edgeport.c

   1 /*
   2  * Edgeport USB Serial Converter driver
   3  *
   4  * Copyright (C) 2000 Inside Out Networks, All rights reserved.
   5  * Copyright (C) 2001-2002 Greg Kroah-Hartman <greg@kroah.com>
   6  *
   7  *      This program is free software; you can redistribute it and/or modify
   8  *      it under the terms of the GNU General Public License as published by
   9  *      the Free Software Foundation; either version 2 of the License, or
  10  *      (at your option) any later version.
  11  *
  12  * Supports the following devices:
  13  *      Edgeport/4
  14  *      Edgeport/4t
  15  *      Edgeport/2
  16  *      Edgeport/4i
  17  *      Edgeport/2i
  18  *      Edgeport/421
  19  *      Edgeport/21
  20  *      Rapidport/4
  21  *      Edgeport/8
  22  *      Edgeport/2D8
  23  *      Edgeport/4D8
  24  *      Edgeport/8i
  25  *
  26  * For questions or problems with this driver, contact Inside Out
  27  * Networks technical support, or Peter Berger <pberger@brimson.com>,
  28  * or Al Borchers <alborchers@steinerpoint.com>.
  29  *
  30  */
  31
  32 #include <linux/kernel.h>
  33 #include <linux/jiffies.h>
  34 #include <linux/errno.h>
  35 #include <linux/init.h>
  36 #include <linux/slab.h>
  37 #include <linux/tty.h>
  38 #include <linux/tty_driver.h>
  39 #include <linux/tty_flip.h>
  40 #include <linux/module.h>
  41 #include <linux/spinlock.h>
  42 #include <linux/serial.h>
  43 #include <linux/ioctl.h>
  44 #include <linux/wait.h>
  45 #include <linux/firmware.h>
  46 #include <linux/ihex.h>
  47 #include <linux/uaccess.h>
  48 #include <linux/usb.h>
  49 #include <linux/usb/serial.h>
  50 #include "io_edgeport.h"
  51 #include "io_ionsp.h"           /* info for the iosp messages */
  52 #include "io_16654.h"           /* 16654 UART defines */
  53
  54 #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 OPEN_TIMEOUT            (5*HZ)          /* 5 seconds */
  60
  61 /* receive port state */
  62 enum RXSTATE {
  63         EXPECT_HDR1 = 0,    /* Expect header byte 1 */
  64         EXPECT_HDR2 = 1,    /* Expect header byte 2 */
  65         EXPECT_DATA = 2,    /* Expect 'RxBytesRemaining' data */
  66         EXPECT_HDR3 = 3,    /* Expect header byte 3 (for status hdrs only) */
  67 };
  68
  69
  70 /* Transmit Fifo
  71  * This Transmit queue is an extension of the edgeport Rx buffer.
  72  * The maximum amount of data buffered in both the edgeport
  73  * Rx buffer (maxTxCredits) and this buffer will never exceed maxTxCredits.
  74  */
  75 struct TxFifo {
  76         unsigned int    head;   /* index to head pointer (write) */
  77         unsigned int    tail;   /* index to tail pointer (read)  */
  78         unsigned int    count;  /* Bytes in queue */
  79         unsigned int    size;   /* Max size of queue (equal to Max number of TxCredits) */
  80         unsigned char   *fifo;  /* allocated Buffer */
  81 };
  82
  83 /* This structure holds all of the local port information */
  84 struct edgeport_port {
  85         __u16                   txCredits;              /* our current credits for this port */
  86         __u16                   maxTxCredits;           /* the max size of the port */
  87
  88         struct TxFifo           txfifo;                 /* transmit fifo -- size will be maxTxCredits */
  89         struct urb              *write_urb;             /* write URB for this port */
  90         bool                    write_in_progress;      /* 'true' while a write URB is outstanding */
  91         spinlock_t              ep_lock;
  92
  93         __u8                    shadowLCR;              /* last LCR value received */
  94         __u8                    shadowMCR;              /* last MCR value received */
  95         __u8                    shadowMSR;              /* last MSR value received */
  96         __u8                    shadowLSR;              /* last LSR value received */
  97         __u8                    shadowXonChar;          /* last value set as XON char in Edgeport */
  98         __u8                    shadowXoffChar;         /* last value set as XOFF char in Edgeport */
  99         __u8                    validDataMask;
 100         __u32                   baudRate;
 101
 102         bool                    open;
 103         bool                    openPending;
 104         bool                    commandPending;
 105         bool                    closePending;
 106         bool                    chaseResponsePending;
 107
 108         wait_queue_head_t       wait_chase;             /* for handling sleeping while waiting for chase to finish */
 109         wait_queue_head_t       wait_open;              /* for handling sleeping while waiting for open to finish */
 110         wait_queue_head_t       wait_command;           /* for handling sleeping while waiting for command to finish */
 111
 112         struct usb_serial_port  *port;                  /* loop back to the owner of this object */
 113 };
 114
 115
 116 /* This structure holds all of the individual device information */
 117 struct edgeport_serial {
 118         char                    name[MAX_NAME_LEN+2];           /* string name of this device */
 119
 120         struct edge_manuf_descriptor    manuf_descriptor;       /* the manufacturer descriptor */
 121         struct edge_boot_descriptor     boot_descriptor;        /* the boot firmware descriptor */
 122         struct edgeport_product_info    product_info;           /* Product Info */
 123         struct edge_compatibility_descriptor epic_descriptor;   /* Edgeport compatible descriptor */
 124         int                     is_epic;                        /* flag if EPiC device or not */
 125
 126         __u8                    interrupt_in_endpoint;          /* the interrupt endpoint handle */
 127         unsigned char           *interrupt_in_buffer;           /* the buffer we use for the interrupt endpoint */
 128         struct urb              *interrupt_read_urb;            /* our interrupt urb */
 129
 130         __u8                    bulk_in_endpoint;               /* the bulk in endpoint handle */
 131         unsigned char           *bulk_in_buffer;                /* the buffer we use for the bulk in endpoint */
 132         struct urb              *read_urb;                      /* our bulk read urb */
 133         bool                    read_in_progress;
 134         spinlock_t              es_lock;
 135
 136         __u8                    bulk_out_endpoint;              /* the bulk out endpoint handle */
 137
 138         __s16                   rxBytesAvail;                   /* the number of bytes that we need to read from this device */
 139
 140         enum RXSTATE            rxState;                        /* the current state of the bulk receive processor */
 141         __u8                    rxHeader1;                      /* receive header byte 1 */
 142         __u8                    rxHeader2;                      /* receive header byte 2 */
 143         __u8                    rxHeader3;                      /* receive header byte 3 */
 144         __u8                    rxPort;                         /* the port that we are currently receiving data for */
 145         __u8                    rxStatusCode;                   /* the receive status code */
 146         __u8                    rxStatusParam;                  /* the receive status paramater */
 147         __s16                   rxBytesRemaining;               /* the number of port bytes left to read */
 148         struct usb_serial       *serial;                        /* loop back to the owner of this object */
 149 };
 150
 151 /* baud rate information */
 152 struct divisor_table_entry {
 153         __u32   BaudRate;
 154         __u16  Divisor;
 155 };
 156
 157 /*
 158  * Define table of divisors for Rev A EdgePort/4 hardware
 159  * These assume a 3.6864MHz crystal, the standard /16, and
 160  * MCR.7 = 0.
 161  */
 162
 163 static const struct divisor_table_entry divisor_table[] = {
 164         {   50,         4608},
 165         {   75,         3072},
 166         {   110,        2095},  /* 2094.545455 => 230450   => .0217 % over */
 167         {   134,        1713},  /* 1713.011152 => 230398.5 => .00065% under */
 168         {   150,        1536},
 169         {   300,        768},
 170         {   600,        384},
 171         {   1200,       192},
 172         {   1800,       128},
 173         {   2400,       96},
 174         {   4800,       48},
 175         {   7200,       32},
 176         {   9600,       24},
 177         {   14400,      16},
 178         {   19200,      12},
 179         {   38400,      6},
 180         {   57600,      4},
 181         {   115200,     2},
 182         {   230400,     1},
 183 };
 184
 185 /* Number of outstanding Command Write Urbs */
 186 static atomic_t CmdUrbs = ATOMIC_INIT(0);
 187
 188
 189 /* local function prototypes */
 190
 191 /* function prototypes for all URB callbacks */
 192 static void edge_interrupt_callback(struct urb *urb);
 193 static void edge_bulk_in_callback(struct urb *urb);
 194 static void edge_bulk_out_data_callback(struct urb *urb);
 195 static void edge_bulk_out_cmd_callback(struct urb *urb);
 196
 197 /* function prototypes for the usbserial callbacks */
 198 static int edge_open(struct tty_struct *tty, struct usb_serial_port *port);
 199 static void edge_close(struct usb_serial_port *port);
 200 static int edge_write(struct tty_struct *tty, struct usb_serial_port *port,
 201                                         const unsigned char *buf, int count);
 202 static int edge_write_room(struct tty_struct *tty);
 203 static int edge_chars_in_buffer(struct tty_struct *tty);
 204 static void edge_throttle(struct tty_struct *tty);
 205 static void edge_unthrottle(struct tty_struct *tty);
 206 static void edge_set_termios(struct tty_struct *tty,
 207                                         struct usb_serial_port *port,
 208                                         struct ktermios *old_termios);
 209 static int  edge_ioctl(struct tty_struct *tty,
 210                                         unsigned int cmd, unsigned long arg);
 211 static void edge_break(struct tty_struct *tty, int break_state);
 212 static int  edge_tiocmget(struct tty_struct *tty);
 213 static int  edge_tiocmset(struct tty_struct *tty,
 214                                         unsigned int set, unsigned int clear);
 215 static int  edge_startup(struct usb_serial *serial);
 216 static void edge_disconnect(struct usb_serial *serial);
 217 static void edge_release(struct usb_serial *serial);
 218 static int edge_port_probe(struct usb_serial_port *port);
 219 static int edge_port_remove(struct usb_serial_port *port);
 220
 221 #include "io_tables.h"  /* all of the devices that this driver supports */
 222
 223 /* function prototypes for all of our local functions */
 224
 225 static void  process_rcvd_data(struct edgeport_serial *edge_serial,
 226                                 unsigned char *buffer, __u16 bufferLength);
 227 static void process_rcvd_status(struct edgeport_serial *edge_serial,
 228                                 __u8 byte2, __u8 byte3);
 229 static void edge_tty_recv(struct usb_serial_port *port, unsigned char *data,
 230                 int length);
 231 static void handle_new_msr(struct edgeport_port *edge_port, __u8 newMsr);
 232 static void handle_new_lsr(struct edgeport_port *edge_port, __u8 lsrData,
 233                                 __u8 lsr, __u8 data);
 234 static int  send_iosp_ext_cmd(struct edgeport_port *edge_port, __u8 command,
 235                                 __u8 param);
 236 static int  calc_baud_rate_divisor(struct device *dev, int baud_rate, int *divisor);
 237 static int  send_cmd_write_baud_rate(struct edgeport_port *edge_port,
 238                                 int baudRate);
 239 static void change_port_settings(struct tty_struct *tty,
 240                                 struct edgeport_port *edge_port,
 241                                 struct ktermios *old_termios);
 242 static int  send_cmd_write_uart_register(struct edgeport_port *edge_port,
 243                                 __u8 regNum, __u8 regValue);
 244 static int  write_cmd_usb(struct edgeport_port *edge_port,
 245                                 unsigned char *buffer, int writeLength);
 246 static void send_more_port_data(struct edgeport_serial *edge_serial,
 247                                 struct edgeport_port *edge_port);
 248
 249 static int sram_write(struct usb_serial *serial, __u16 extAddr, __u16 addr,
 250                                         __u16 length, const __u8 *data);
 251 static int rom_read(struct usb_serial *serial, __u16 extAddr, __u16 addr,
 252                                                 __u16 length, __u8 *data);
 253 static int rom_write(struct usb_serial *serial, __u16 extAddr, __u16 addr,
 254                                         __u16 length, const __u8 *data);
 255 static void get_manufacturing_desc(struct edgeport_serial *edge_serial);
 256 static void get_boot_desc(struct edgeport_serial *edge_serial);
 257 static void load_application_firmware(struct edgeport_serial *edge_serial);
 258
 259 static void unicode_to_ascii(char *string, int buflen,
 260                                 __le16 *unicode, int unicode_size);
 261
 262
 263 /* ************************************************************************ */
 264 /* ************************************************************************ */
 265 /* ************************************************************************ */
 266 /* ************************************************************************ */
 267
 268 /************************************************************************
 269  *                                                                      *
 270  * update_edgeport_E2PROM()     Compare current versions of             *
 271  *                              Boot ROM and Manufacture                *
 272  *                              Descriptors with versions               *
 273  *                              embedded in this driver                 *
 274  *                                                                      *
 275  ************************************************************************/
 276 static void update_edgeport_E2PROM(struct edgeport_serial *edge_serial)
 277 {
 278         struct device *dev = &edge_serial->serial->dev->dev;
 279         __u32 BootCurVer;
 280         __u32 BootNewVer;
 281         __u8 BootMajorVersion;
 282         __u8 BootMinorVersion;
 283         __u16 BootBuildNumber;
 284         __u32 Bootaddr;
 285         const struct ihex_binrec *rec;
 286         const struct firmware *fw;
 287         const char *fw_name;
 288         int response;
 289
 290         switch (edge_serial->product_info.iDownloadFile) {
 291         case EDGE_DOWNLOAD_FILE_I930:
 292                 fw_name = "edgeport/boot.fw";
 293                 break;
 294         case EDGE_DOWNLOAD_FILE_80251:
 295                 fw_name = "edgeport/boot2.fw";
 296                 break;
 297         default:
 298                 return;
 299         }
 300
 301         response = request_ihex_firmware(&fw, fw_name,
 302                                          &edge_serial->serial->dev->dev);
 303         if (response) {
 304                 dev_err(dev, "Failed to load image \"%s\" err %d\n",
 305                        fw_name, response);
 306                 return;
 307         }
 308
 309         rec = (const struct ihex_binrec *)fw->data;
 310         BootMajorVersion = rec->data[0];
 311         BootMinorVersion = rec->data[1];
 312         BootBuildNumber = (rec->data[2] << 8) | rec->data[3];
 313
 314         /* Check Boot Image Version */
 315         BootCurVer = (edge_serial->boot_descriptor.MajorVersion << 24) +
 316                      (edge_serial->boot_descriptor.MinorVersion << 16) +
 317                       le16_to_cpu(edge_serial->boot_descriptor.BuildNumber);
 318
 319         BootNewVer = (BootMajorVersion << 24) +
 320                      (BootMinorVersion << 16) +
 321                       BootBuildNumber;
 322
 323         dev_dbg(dev, "Current Boot Image version %d.%d.%d\n",
 324             edge_serial->boot_descriptor.MajorVersion,
 325             edge_serial->boot_descriptor.MinorVersion,
 326             le16_to_cpu(edge_serial->boot_descriptor.BuildNumber));
 327
 328
 329         if (BootNewVer > BootCurVer) {
 330                 dev_dbg(dev, "**Update Boot Image from %d.%d.%d to %d.%d.%d\n",
 331                     edge_serial->boot_descriptor.MajorVersion,
 332                     edge_serial->boot_descriptor.MinorVersion,
 333                     le16_to_cpu(edge_serial->boot_descriptor.BuildNumber),
 334                     BootMajorVersion, BootMinorVersion, BootBuildNumber);
 335
 336                 dev_dbg(dev, "Downloading new Boot Image\n");
 337
 338                 for (rec = ihex_next_binrec(rec); rec;
 339                      rec = ihex_next_binrec(rec)) {
 340                         Bootaddr = be32_to_cpu(rec->addr);
 341                         response = rom_write(edge_serial->serial,
 342                                              Bootaddr >> 16,
 343                                              Bootaddr & 0xFFFF,
 344                                              be16_to_cpu(rec->len),
 345                                              &rec->data[0]);
 346                         if (response < 0) {
 347                                 dev_err(&edge_serial->serial->dev->dev,
 348                                         "rom_write failed (%x, %x, %d)\n",
 349                                         Bootaddr >> 16, Bootaddr & 0xFFFF,
 350                                         be16_to_cpu(rec->len));
 351                                 break;
 352                         }
 353                 }
 354         } else {
 355                 dev_dbg(dev, "Boot Image -- already up to date\n");
 356         }
 357         release_firmware(fw);
 358 }
 359
 360 #if 0
 361 /************************************************************************
 362  *
 363  *  Get string descriptor from device
 364  *
 365  ************************************************************************/
 366 static int get_string_desc(struct usb_device *dev, int Id,
 367                                 struct usb_string_descriptor **pRetDesc)
 368 {
 369         struct usb_string_descriptor StringDesc;
 370         struct usb_string_descriptor *pStringDesc;
 371
 372         dev_dbg(&dev->dev, "%s - USB String ID = %d\n", __func__, Id);
 373
 374         if (!usb_get_descriptor(dev, USB_DT_STRING, Id, &StringDesc,
 375                                                 sizeof(StringDesc)))
 376                 return 0;
 377
 378         pStringDesc = kmalloc(StringDesc.bLength, GFP_KERNEL);
 379         if (!pStringDesc)
 380                 return -1;
 381
 382         if (!usb_get_descriptor(dev, USB_DT_STRING, Id, pStringDesc,
 383                                                         StringDesc.bLength)) {
 384                 kfree(pStringDesc);
 385                 return -1;
 386         }
 387
 388         *pRetDesc = pStringDesc;
 389         return 0;
 390 }
 391 #endif
 392
 393 static void dump_product_info(struct edgeport_serial *edge_serial,
 394                               struct edgeport_product_info *product_info)
 395 {
 396         struct device *dev = &edge_serial->serial->dev->dev;
 397
 398         /* Dump Product Info structure */
 399         dev_dbg(dev, "**Product Information:\n");
 400         dev_dbg(dev, "  ProductId             %x\n", product_info->ProductId);
 401         dev_dbg(dev, "  NumPorts              %d\n", product_info->NumPorts);
 402         dev_dbg(dev, "  ProdInfoVer           %d\n", product_info->ProdInfoVer);
 403         dev_dbg(dev, "  IsServer              %d\n", product_info->IsServer);
 404         dev_dbg(dev, "  IsRS232               %d\n", product_info->IsRS232);
 405         dev_dbg(dev, "  IsRS422               %d\n", product_info->IsRS422);
 406         dev_dbg(dev, "  IsRS485               %d\n", product_info->IsRS485);
 407         dev_dbg(dev, "  RomSize               %d\n", product_info->RomSize);
 408         dev_dbg(dev, "  RamSize               %d\n", product_info->RamSize);
 409         dev_dbg(dev, "  CpuRev                %x\n", product_info->CpuRev);
 410         dev_dbg(dev, "  BoardRev              %x\n", product_info->BoardRev);
 411         dev_dbg(dev, "  BootMajorVersion      %d.%d.%d\n",
 412                 product_info->BootMajorVersion,
 413                 product_info->BootMinorVersion,
 414                 le16_to_cpu(product_info->BootBuildNumber));
 415         dev_dbg(dev, "  FirmwareMajorVersion  %d.%d.%d\n",
 416                 product_info->FirmwareMajorVersion,
 417                 product_info->FirmwareMinorVersion,
 418                 le16_to_cpu(product_info->FirmwareBuildNumber));
 419         dev_dbg(dev, "  ManufactureDescDate   %d/%d/%d\n",
 420                 product_info->ManufactureDescDate[0],
 421                 product_info->ManufactureDescDate[1],
 422                 product_info->ManufactureDescDate[2]+1900);
 423         dev_dbg(dev, "  iDownloadFile         0x%x\n",
 424                 product_info->iDownloadFile);
 425         dev_dbg(dev, "  EpicVer               %d\n", product_info->EpicVer);
 426 }
 427
 428 static void get_product_info(struct edgeport_serial *edge_serial)
 429 {
 430         struct edgeport_product_info *product_info = &edge_serial->product_info;
 431
 432         memset(product_info, 0, sizeof(struct edgeport_product_info));
 433
 434         product_info->ProductId = (__u16)(le16_to_cpu(edge_serial->serial->dev->descriptor.idProduct) & ~ION_DEVICE_ID_80251_NETCHIP);
 435         product_info->NumPorts = edge_serial->manuf_descriptor.NumPorts;
 436         product_info->ProdInfoVer = 0;
 437
 438         product_info->RomSize = edge_serial->manuf_descriptor.RomSize;
 439         product_info->RamSize = edge_serial->manuf_descriptor.RamSize;
 440         product_info->CpuRev = edge_serial->manuf_descriptor.CpuRev;
 441         product_info->BoardRev = edge_serial->manuf_descriptor.BoardRev;
 442
 443         product_info->BootMajorVersion =
 444                                 edge_serial->boot_descriptor.MajorVersion;
 445         product_info->BootMinorVersion =
 446                                 edge_serial->boot_descriptor.MinorVersion;
 447         product_info->BootBuildNumber =
 448                                 edge_serial->boot_descriptor.BuildNumber;
 449
 450         memcpy(product_info->ManufactureDescDate,
 451                         edge_serial->manuf_descriptor.DescDate,
 452                         sizeof(edge_serial->manuf_descriptor.DescDate));
 453
 454         /* check if this is 2nd generation hardware */
 455         if (le16_to_cpu(edge_serial->serial->dev->descriptor.idProduct)
 456                                             & ION_DEVICE_ID_80251_NETCHIP)
 457                 product_info->iDownloadFile = EDGE_DOWNLOAD_FILE_80251;
 458         else
 459                 product_info->iDownloadFile = EDGE_DOWNLOAD_FILE_I930;
 460
 461         /* Determine Product type and set appropriate flags */
 462         switch (DEVICE_ID_FROM_USB_PRODUCT_ID(product_info->ProductId)) {
 463         case ION_DEVICE_ID_EDGEPORT_COMPATIBLE:
 464         case ION_DEVICE_ID_EDGEPORT_4T:
 465         case ION_DEVICE_ID_EDGEPORT_4:
 466         case ION_DEVICE_ID_EDGEPORT_2:
 467         case ION_DEVICE_ID_EDGEPORT_8_DUAL_CPU:
 468         case ION_DEVICE_ID_EDGEPORT_8:
 469         case ION_DEVICE_ID_EDGEPORT_421:
 470         case ION_DEVICE_ID_EDGEPORT_21:
 471         case ION_DEVICE_ID_EDGEPORT_2_DIN:
 472         case ION_DEVICE_ID_EDGEPORT_4_DIN:
 473         case ION_DEVICE_ID_EDGEPORT_16_DUAL_CPU:
 474                 product_info->IsRS232 = 1;
 475                 break;
 476
 477         case ION_DEVICE_ID_EDGEPORT_2I: /* Edgeport/2 RS422/RS485 */
 478                 product_info->IsRS422 = 1;
 479                 product_info->IsRS485 = 1;
 480                 break;
 481
 482         case ION_DEVICE_ID_EDGEPORT_8I: /* Edgeport/4 RS422 */
 483         case ION_DEVICE_ID_EDGEPORT_4I: /* Edgeport/4 RS422 */
 484                 product_info->IsRS422 = 1;
 485                 break;
 486         }
 487
 488         dump_product_info(edge_serial, product_info);
 489 }
 490
 491 static int get_epic_descriptor(struct edgeport_serial *ep)
 492 {
 493         int result;
 494         struct usb_serial *serial = ep->serial;
 495         struct edgeport_product_info *product_info = &ep->product_info;
 496         struct edge_compatibility_descriptor *epic = &ep->epic_descriptor;
 497         struct edge_compatibility_bits *bits;
 498         struct device *dev = &serial->dev->dev;
 499
 500         ep->is_epic = 0;
 501         result = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
 502                                  USB_REQUEST_ION_GET_EPIC_DESC,
 503                                  0xC0, 0x00, 0x00,
 504                                  &ep->epic_descriptor,
 505                                  sizeof(struct edge_compatibility_descriptor),
 506                                  300);
 507
 508         if (result > 0) {
 509                 ep->is_epic = 1;
 510                 memset(product_info, 0, sizeof(struct edgeport_product_info));
 511
 512                 product_info->NumPorts = epic->NumPorts;
 513                 product_info->ProdInfoVer = 0;
 514                 product_info->FirmwareMajorVersion = epic->MajorVersion;
 515                 product_info->FirmwareMinorVersion = epic->MinorVersion;
 516                 product_info->FirmwareBuildNumber = epic->BuildNumber;
 517                 product_info->iDownloadFile = epic->iDownloadFile;
 518                 product_info->EpicVer = epic->EpicVer;
 519                 product_info->Epic = epic->Supports;
 520                 product_info->ProductId = ION_DEVICE_ID_EDGEPORT_COMPATIBLE;
 521                 dump_product_info(ep, product_info);
 522
 523                 bits = &ep->epic_descriptor.Supports;
 524                 dev_dbg(dev, "**EPIC descriptor:\n");
 525                 dev_dbg(dev, "  VendEnableSuspend: %s\n", bits->VendEnableSuspend ? "TRUE": "FALSE");
 526                 dev_dbg(dev, "  IOSPOpen         : %s\n", bits->IOSPOpen        ? "TRUE": "FALSE");
 527                 dev_dbg(dev, "  IOSPClose        : %s\n", bits->IOSPClose       ? "TRUE": "FALSE");
 528                 dev_dbg(dev, "  IOSPChase        : %s\n", bits->IOSPChase       ? "TRUE": "FALSE");
 529                 dev_dbg(dev, "  IOSPSetRxFlow    : %s\n", bits->IOSPSetRxFlow   ? "TRUE": "FALSE");
 530                 dev_dbg(dev, "  IOSPSetTxFlow    : %s\n", bits->IOSPSetTxFlow   ? "TRUE": "FALSE");
 531                 dev_dbg(dev, "  IOSPSetXChar     : %s\n", bits->IOSPSetXChar    ? "TRUE": "FALSE");
 532                 dev_dbg(dev, "  IOSPRxCheck      : %s\n", bits->IOSPRxCheck     ? "TRUE": "FALSE");
 533                 dev_dbg(dev, "  IOSPSetClrBreak  : %s\n", bits->IOSPSetClrBreak ? "TRUE": "FALSE");
 534                 dev_dbg(dev, "  IOSPWriteMCR     : %s\n", bits->IOSPWriteMCR    ? "TRUE": "FALSE");
 535                 dev_dbg(dev, "  IOSPWriteLCR     : %s\n", bits->IOSPWriteLCR    ? "TRUE": "FALSE");
 536                 dev_dbg(dev, "  IOSPSetBaudRate  : %s\n", bits->IOSPSetBaudRate ? "TRUE": "FALSE");
 537                 dev_dbg(dev, "  TrueEdgeport     : %s\n", bits->TrueEdgeport    ? "TRUE": "FALSE");
 538         }
 539
 540         return result;
 541 }
 542
 543
 544 /************************************************************************/
 545 /************************************************************************/
 546 /*            U S B  C A L L B A C K   F U N C T I O N S                */
 547 /*            U S B  C A L L B A C K   F U N C T I O N S                */
 548 /************************************************************************/
 549 /************************************************************************/
 550
 551 /*****************************************************************************
 552  * edge_interrupt_callback
 553  *      this is the callback function for when we have received data on the
 554  *      interrupt endpoint.
 555  *****************************************************************************/
 556 static void edge_interrupt_callback(struct urb *urb)
 557 {
 558         struct edgeport_serial *edge_serial = urb->context;
 559         struct device *dev;
 560         struct edgeport_port *edge_port;
 561         struct usb_serial_port *port;
 562         unsigned char *data = urb->transfer_buffer;
 563         int length = urb->actual_length;
 564         int bytes_avail;
 565         int position;
 566         int txCredits;
 567         int portNumber;
 568         int result;
 569         int status = urb->status;
 570
 571         switch (status) {
 572         case 0:
 573                 /* success */
 574                 break;
 575         case -ECONNRESET:
 576         case -ENOENT:
 577         case -ESHUTDOWN:
 578                 /* this urb is terminated, clean up */
 579                 dev_dbg(&urb->dev->dev, "%s - urb shutting down with status: %d\n", __func__, status);
 580                 return;
 581         default:
 582                 dev_dbg(&urb->dev->dev, "%s - nonzero urb status received: %d\n", __func__, status);
 583                 goto exit;
 584         }
 585
 586         dev = &edge_serial->serial->dev->dev;
 587
 588         /* process this interrupt-read even if there are no ports open */
 589         if (length) {
 590                 usb_serial_debug_data(dev, __func__, length, data);
 591
 592                 if (length > 1) {
 593                         bytes_avail = data[0] | (data[1] << 8);
 594                         if (bytes_avail) {
 595                                 spin_lock(&edge_serial->es_lock);
 596                                 edge_serial->rxBytesAvail += bytes_avail;
 597                                 dev_dbg(dev,
 598                                         "%s - bytes_avail=%d, rxBytesAvail=%d, read_in_progress=%d\n",
 599                                         __func__, bytes_avail,
 600                                         edge_serial->rxBytesAvail,
 601                                         edge_serial->read_in_progress);
 602
 603                                 if (edge_serial->rxBytesAvail > 0 &&
 604                                     !edge_serial->read_in_progress) {
 605                                         dev_dbg(dev, "%s - posting a read\n", __func__);
 606                                         edge_serial->read_in_progress = true;
 607
 608                                         /* we have pending bytes on the
 609                                            bulk in pipe, send a request */
 610                                         result = usb_submit_urb(edge_serial->read_urb, GFP_ATOMIC);
 611                                         if (result) {
 612                                                 dev_err(dev,
 613                                                         "%s - usb_submit_urb(read bulk) failed with result = %d\n",
 614                                                         __func__, result);
 615                                                 edge_serial->read_in_progress = false;
 616                                         }
 617                                 }
 618                                 spin_unlock(&edge_serial->es_lock);
 619                         }
 620                 }
 621                 /* grab the txcredits for the ports if available */
 622                 position = 2;
 623                 portNumber = 0;
 624                 while ((position < length) &&
 625                                 (portNumber < edge_serial->serial->num_ports)) {
 626                         txCredits = data[position] | (data[position+1] << 8);
 627                         if (txCredits) {
 628                                 port = edge_serial->serial->port[portNumber];
 629                                 edge_port = usb_get_serial_port_data(port);
 630                                 if (edge_port->open) {
 631                                         spin_lock(&edge_port->ep_lock);
 632                                         edge_port->txCredits += txCredits;
 633                                         spin_unlock(&edge_port->ep_lock);
 634                                         dev_dbg(dev, "%s - txcredits for port%d = %d\n",
 635                                                 __func__, portNumber,
 636                                                 edge_port->txCredits);
 637
 638                                         /* tell the tty driver that something
 639                                            has changed */
 640                                         tty_port_tty_wakeup(&edge_port->port->port);
 641                                         /* Since we have more credit, check
 642                                            if more data can be sent */
 643                                         send_more_port_data(edge_serial,
 644                                                                 edge_port);
 645                                 }
 646                         }
 647                         position += 2;
 648                         ++portNumber;
 649                 }
 650         }
 651
 652 exit:
 653         result = usb_submit_urb(urb, GFP_ATOMIC);
 654         if (result)
 655                 dev_err(&urb->dev->dev,
 656                         "%s - Error %d submitting control urb\n",
 657                                                 __func__, result);
 658 }
 659
 660
 661 /*****************************************************************************
 662  * edge_bulk_in_callback
 663  *      this is the callback function for when we have received data on the
 664  *      bulk in endpoint.
 665  *****************************************************************************/
 666 static void edge_bulk_in_callback(struct urb *urb)
 667 {
 668         struct edgeport_serial  *edge_serial = urb->context;
 669         struct device *dev;
 670         unsigned char           *data = urb->transfer_buffer;
 671         int                     retval;
 672         __u16                   raw_data_length;
 673         int status = urb->status;
 674
 675         if (status) {
 676                 dev_dbg(&urb->dev->dev, "%s - nonzero read bulk status received: %d\n",
 677                         __func__, status);
 678                 edge_serial->read_in_progress = false;
 679                 return;
 680         }
 681
 682         if (urb->actual_length == 0) {
 683                 dev_dbg(&urb->dev->dev, "%s - read bulk callback with no data\n", __func__);
 684                 edge_serial->read_in_progress = false;
 685                 return;
 686         }
 687
 688         dev = &edge_serial->serial->dev->dev;
 689         raw_data_length = urb->actual_length;
 690
 691         usb_serial_debug_data(dev, __func__, raw_data_length, data);
 692
 693         spin_lock(&edge_serial->es_lock);
 694
 695         /* decrement our rxBytes available by the number that we just got */
 696         edge_serial->rxBytesAvail -= raw_data_length;
 697
 698         dev_dbg(dev, "%s - Received = %d, rxBytesAvail %d\n", __func__,
 699                 raw_data_length, edge_serial->rxBytesAvail);
 700
 701         process_rcvd_data(edge_serial, data, urb->actual_length);
 702
 703         /* check to see if there's any more data for us to read */
 704         if (edge_serial->rxBytesAvail > 0) {
 705                 dev_dbg(dev, "%s - posting a read\n", __func__);
 706                 retval = usb_submit_urb(edge_serial->read_urb, GFP_ATOMIC);
 707                 if (retval) {
 708                         dev_err(dev,
 709                                 "%s - usb_submit_urb(read bulk) failed, retval = %d\n",
 710                                 __func__, retval);
 711                         edge_serial->read_in_progress = false;
 712                 }
 713         } else {
 714                 edge_serial->read_in_progress = false;
 715         }
 716
 717         spin_unlock(&edge_serial->es_lock);
 718 }
 719
 720
 721 /*****************************************************************************
 722  * edge_bulk_out_data_callback
 723  *      this is the callback function for when we have finished sending
 724  *      serial data on the bulk out endpoint.
 725  *****************************************************************************/
 726 static void edge_bulk_out_data_callback(struct urb *urb)
 727 {
 728         struct edgeport_port *edge_port = urb->context;
 729         int status = urb->status;
 730
 731         if (status) {
 732                 dev_dbg(&urb->dev->dev,
 733                         "%s - nonzero write bulk status received: %d\n",
 734                         __func__, status);
 735         }
 736
 737         if (edge_port->open)
 738                 tty_port_tty_wakeup(&edge_port->port->port);
 739
 740         /* Release the Write URB */
 741         edge_port->write_in_progress = false;
 742
 743         /* Check if more data needs to be sent */
 744         send_more_port_data((struct edgeport_serial *)
 745                 (usb_get_serial_data(edge_port->port->serial)), edge_port);
 746 }
 747
 748
 749 /*****************************************************************************
 750  * BulkOutCmdCallback
 751  *      this is the callback function for when we have finished sending a
 752  *      command on the bulk out endpoint.
 753  *****************************************************************************/
 754 static void edge_bulk_out_cmd_callback(struct urb *urb)
 755 {
 756         struct edgeport_port *edge_port = urb->context;
 757         int status = urb->status;
 758
 759         atomic_dec(&CmdUrbs);
 760         dev_dbg(&urb->dev->dev, "%s - FREE URB %p (outstanding %d)\n",
 761                 __func__, urb, atomic_read(&CmdUrbs));
 762
 763
 764         /* clean up the transfer buffer */
 765         kfree(urb->transfer_buffer);
 766
 767         /* Free the command urb */
 768         usb_free_urb(urb);
 769
 770         if (status) {
 771                 dev_dbg(&urb->dev->dev,
 772                         "%s - nonzero write bulk status received: %d\n",
 773                         __func__, status);
 774                 return;
 775         }
 776
 777         /* tell the tty driver that something has changed */
 778         if (edge_port->open)
 779                 tty_port_tty_wakeup(&edge_port->port->port);
 780
 781         /* we have completed the command */
 782         edge_port->commandPending = false;
 783         wake_up(&edge_port->wait_command);
 784 }
 785
 786
 787 /*****************************************************************************
 788  * Driver tty interface functions
 789  *****************************************************************************/
 790
 791 /*****************************************************************************
 792  * SerialOpen
 793  *      this function is called by the tty driver when a port is opened
 794  *      If successful, we return 0
 795  *      Otherwise we return a negative error number.
 796  *****************************************************************************/
 797 static int edge_open(struct tty_struct *tty, struct usb_serial_port *port)
 798 {
 799         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
 800         struct device *dev = &port->dev;
 801         struct usb_serial *serial;
 802         struct edgeport_serial *edge_serial;
 803         int response;
 804
 805         if (edge_port == NULL)
 806                 return -ENODEV;
 807
 808         /* see if we've set up our endpoint info yet (can't set it up
 809            in edge_startup as the structures were not set up at that time.) */
 810         serial = port->serial;
 811         edge_serial = usb_get_serial_data(serial);
 812         if (edge_serial == NULL)
 813                 return -ENODEV;
 814         if (edge_serial->interrupt_in_buffer == NULL) {
 815                 struct usb_serial_port *port0 = serial->port[0];
 816
 817                 /* not set up yet, so do it now */
 818                 edge_serial->interrupt_in_buffer =
 819                                         port0->interrupt_in_buffer;
 820                 edge_serial->interrupt_in_endpoint =
 821                                         port0->interrupt_in_endpointAddress;
 822                 edge_serial->interrupt_read_urb = port0->interrupt_in_urb;
 823                 edge_serial->bulk_in_buffer = port0->bulk_in_buffer;
 824                 edge_serial->bulk_in_endpoint =
 825                                         port0->bulk_in_endpointAddress;
 826                 edge_serial->read_urb = port0->read_urb;
 827                 edge_serial->bulk_out_endpoint =
 828                                         port0->bulk_out_endpointAddress;
 829
 830                 /* set up our interrupt urb */
 831                 usb_fill_int_urb(edge_serial->interrupt_read_urb,
 832                       serial->dev,
 833                       usb_rcvintpipe(serial->dev,
 834                                 port0->interrupt_in_endpointAddress),
 835                       port0->interrupt_in_buffer,
 836                       edge_serial->interrupt_read_urb->transfer_buffer_length,
 837                       edge_interrupt_callback, edge_serial,
 838                       edge_serial->interrupt_read_urb->interval);
 839
 840                 /* set up our bulk in urb */
 841                 usb_fill_bulk_urb(edge_serial->read_urb, serial->dev,
 842                         usb_rcvbulkpipe(serial->dev,
 843                                 port0->bulk_in_endpointAddress),
 844                         port0->bulk_in_buffer,
 845                         edge_serial->read_urb->transfer_buffer_length,
 846                         edge_bulk_in_callback, edge_serial);
 847                 edge_serial->read_in_progress = false;
 848
 849                 /* start interrupt read for this edgeport
 850                  * this interrupt will continue as long
 851                  * as the edgeport is connected */
 852                 response = usb_submit_urb(edge_serial->interrupt_read_urb,
 853                                                                 GFP_KERNEL);
 854                 if (response) {
 855                         dev_err(dev, "%s - Error %d submitting control urb\n",
 856                                 __func__, response);
 857                 }
 858         }
 859
 860         /* initialize our wait queues */
 861         init_waitqueue_head(&edge_port->wait_open);
 862         init_waitqueue_head(&edge_port->wait_chase);
 863         init_waitqueue_head(&edge_port->wait_command);
 864
 865         /* initialize our port settings */
 866         edge_port->txCredits = 0;       /* Can't send any data yet */
 867         /* Must always set this bit to enable ints! */
 868         edge_port->shadowMCR = MCR_MASTER_IE;
 869         edge_port->chaseResponsePending = false;
 870
 871         /* send a open port command */
 872         edge_port->openPending = true;
 873         edge_port->open        = false;
 874         response = send_iosp_ext_cmd(edge_port, IOSP_CMD_OPEN_PORT, 0);
 875
 876         if (response < 0) {
 877                 dev_err(dev, "%s - error sending open port command\n", __func__);
 878                 edge_port->openPending = false;
 879                 return -ENODEV;
 880         }
 881
 882         /* now wait for the port to be completely opened */
 883         wait_event_timeout(edge_port->wait_open, !edge_port->openPending,
 884                                                                 OPEN_TIMEOUT);
 885
 886         if (!edge_port->open) {
 887                 /* open timed out */
 888                 dev_dbg(dev, "%s - open timedout\n", __func__);
 889                 edge_port->openPending = false;
 890                 return -ENODEV;
 891         }
 892
 893         /* create the txfifo */
 894         edge_port->txfifo.head  = 0;
 895         edge_port->txfifo.tail  = 0;
 896         edge_port->txfifo.count = 0;
 897         edge_port->txfifo.size  = edge_port->maxTxCredits;
 898         edge_port->txfifo.fifo  = kmalloc(edge_port->maxTxCredits, GFP_KERNEL);
 899
 900         if (!edge_port->txfifo.fifo) {
 901                 dev_dbg(dev, "%s - no memory\n", __func__);
 902                 edge_close(port);
 903                 return -ENOMEM;
 904         }
 905
 906         /* Allocate a URB for the write */
 907         edge_port->write_urb = usb_alloc_urb(0, GFP_KERNEL);
 908         edge_port->write_in_progress = false;
 909
 910         if (!edge_port->write_urb) {
 911                 dev_dbg(dev, "%s - no memory\n", __func__);
 912                 edge_close(port);
 913                 return -ENOMEM;
 914         }
 915
 916         dev_dbg(dev, "%s - Initialize TX fifo to %d bytes\n",
 917                 __func__, edge_port->maxTxCredits);
 918
 919         return 0;
 920 }
 921
 922
 923 /************************************************************************
 924  *
 925  * block_until_chase_response
 926  *
 927  *      This function will block the close until one of the following:
 928  *              1. Response to our Chase comes from Edgeport
 929  *              2. A timeout of 10 seconds without activity has expired
 930  *                 (1K of Edgeport data @ 2400 baud ==> 4 sec to empty)
 931  *
 932  ************************************************************************/
 933 static void block_until_chase_response(struct edgeport_port *edge_port)
 934 {
 935         struct device *dev = &edge_port->port->dev;
 936         DEFINE_WAIT(wait);
 937         __u16 lastCredits;
 938         int timeout = 1*HZ;
 939         int loop = 10;
 940
 941         while (1) {
 942                 /* Save Last credits */
 943                 lastCredits = edge_port->txCredits;
 944
 945                 /* Did we get our Chase response */
 946                 if (!edge_port->chaseResponsePending) {
 947                         dev_dbg(dev, "%s - Got Chase Response\n", __func__);
 948
 949                         /* did we get all of our credit back? */
 950                         if (edge_port->txCredits == edge_port->maxTxCredits) {
 951                                 dev_dbg(dev, "%s - Got all credits\n", __func__);
 952                                 return;
 953                         }
 954                 }
 955
 956                 /* Block the thread for a while */
 957                 prepare_to_wait(&edge_port->wait_chase, &wait,
 958                                                 TASK_UNINTERRUPTIBLE);
 959                 schedule_timeout(timeout);
 960                 finish_wait(&edge_port->wait_chase, &wait);
 961
 962                 if (lastCredits == edge_port->txCredits) {
 963                         /* No activity.. count down. */
 964                         loop--;
 965                         if (loop == 0) {
 966                                 edge_port->chaseResponsePending = false;
 967                                 dev_dbg(dev, "%s - Chase TIMEOUT\n", __func__);
 968                                 return;
 969                         }
 970                 } else {
 971                         /* Reset timeout value back to 10 seconds */
 972                         dev_dbg(dev, "%s - Last %d, Current %d\n", __func__,
 973                                         lastCredits, edge_port->txCredits);
 974                         loop = 10;
 975                 }
 976         }
 977 }
 978
 979
 980 /************************************************************************
 981  *
 982  * block_until_tx_empty
 983  *
 984  *      This function will block the close until one of the following:
 985  *              1. TX count are 0
 986  *              2. The edgeport has stopped
 987  *              3. A timeout of 3 seconds without activity has expired
 988  *
 989  ************************************************************************/
 990 static void block_until_tx_empty(struct edgeport_port *edge_port)
 991 {
 992         struct device *dev = &edge_port->port->dev;
 993         DEFINE_WAIT(wait);
 994         struct TxFifo *fifo = &edge_port->txfifo;
 995         __u32 lastCount;
 996         int timeout = HZ/10;
 997         int loop = 30;
 998
 999         while (1) {
1000                 /* Save Last count */
1001                 lastCount = fifo->count;
1002
1003                 /* Is the Edgeport Buffer empty? */
1004                 if (lastCount == 0) {
1005                         dev_dbg(dev, "%s - TX Buffer Empty\n", __func__);
1006                         return;
1007                 }
1008
1009                 /* Block the thread for a while */
1010                 prepare_to_wait(&edge_port->wait_chase, &wait,
1011                                                 TASK_UNINTERRUPTIBLE);
1012                 schedule_timeout(timeout);
1013                 finish_wait(&edge_port->wait_chase, &wait);
1014
1015                 dev_dbg(dev, "%s wait\n", __func__);
1016
1017                 if (lastCount == fifo->count) {
1018                         /* No activity.. count down. */
1019                         loop--;
1020                         if (loop == 0) {
1021                                 dev_dbg(dev, "%s - TIMEOUT\n", __func__);
1022                                 return;
1023                         }
1024                 } else {
1025                         /* Reset timeout value back to seconds */
1026                         loop = 30;
1027                 }
1028         }
1029 }
1030
1031
1032 /*****************************************************************************
1033  * edge_close
1034  *      this function is called by the tty driver when a port is closed
1035  *****************************************************************************/
1036 static void edge_close(struct usb_serial_port *port)
1037 {
1038         struct edgeport_serial *edge_serial;
1039         struct edgeport_port *edge_port;
1040         int status;
1041
1042         edge_serial = usb_get_serial_data(port->serial);
1043         edge_port = usb_get_serial_port_data(port);
1044         if (edge_serial == NULL || edge_port == NULL)
1045                 return;
1046
1047         /* block until tx is empty */
1048         block_until_tx_empty(edge_port);
1049
1050         edge_port->closePending = true;
1051
1052         if ((!edge_serial->is_epic) ||
1053             ((edge_serial->is_epic) &&
1054              (edge_serial->epic_descriptor.Supports.IOSPChase))) {
1055                 /* flush and chase */
1056                 edge_port->chaseResponsePending = true;
1057
1058                 dev_dbg(&port->dev, "%s - Sending IOSP_CMD_CHASE_PORT\n", __func__);
1059                 status = send_iosp_ext_cmd(edge_port, IOSP_CMD_CHASE_PORT, 0);
1060                 if (status == 0)
1061                         /* block until chase finished */
1062                         block_until_chase_response(edge_port);
1063                 else
1064                         edge_port->chaseResponsePending = false;
1065         }
1066
1067         if ((!edge_serial->is_epic) ||
1068             ((edge_serial->is_epic) &&
1069              (edge_serial->epic_descriptor.Supports.IOSPClose))) {
1070                /* close the port */
1071                 dev_dbg(&port->dev, "%s - Sending IOSP_CMD_CLOSE_PORT\n", __func__);
1072                 send_iosp_ext_cmd(edge_port, IOSP_CMD_CLOSE_PORT, 0);
1073         }
1074
1075         /* port->close = true; */
1076         edge_port->closePending = false;
1077         edge_port->open = false;
1078         edge_port->openPending = false;
1079
1080         usb_kill_urb(edge_port->write_urb);
1081
1082         if (edge_port->write_urb) {
1083                 /* if this urb had a transfer buffer already
1084                                 (old transfer) free it */
1085                 kfree(edge_port->write_urb->transfer_buffer);
1086                 usb_free_urb(edge_port->write_urb);
1087                 edge_port->write_urb = NULL;
1088         }
1089         kfree(edge_port->txfifo.fifo);
1090         edge_port->txfifo.fifo = NULL;
1091 }
1092
1093 /*****************************************************************************
1094  * SerialWrite
1095  *      this function is called by the tty driver when data should be written
1096  *      to the port.
1097  *      If successful, we return the number of bytes written, otherwise we
1098  *      return a negative error number.
1099  *****************************************************************************/
1100 static int edge_write(struct tty_struct *tty, struct usb_serial_port *port,
1101                                         const unsigned char *data, int count)
1102 {
1103         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1104         struct TxFifo *fifo;
1105         int copySize;
1106         int bytesleft;
1107         int firsthalf;
1108         int secondhalf;
1109         unsigned long flags;
1110
1111         if (edge_port == NULL)
1112                 return -ENODEV;
1113
1114         /* get a pointer to the Tx fifo */
1115         fifo = &edge_port->txfifo;
1116
1117         spin_lock_irqsave(&edge_port->ep_lock, flags);
1118
1119         /* calculate number of bytes to put in fifo */
1120         copySize = min((unsigned int)count,
1121                                 (edge_port->txCredits - fifo->count));
1122
1123         dev_dbg(&port->dev, "%s of %d byte(s) Fifo room  %d -- will copy %d bytes\n",
1124                 __func__, count, edge_port->txCredits - fifo->count, copySize);
1125
1126         /* catch writes of 0 bytes which the tty driver likes to give us,
1127            and when txCredits is empty */
1128         if (copySize == 0) {
1129                 dev_dbg(&port->dev, "%s - copySize = Zero\n", __func__);
1130                 goto finish_write;
1131         }
1132
1133         /* queue the data
1134          * since we can never overflow the buffer we do not have to check for a
1135          * full condition
1136          *
1137          * the copy is done is two parts -- first fill to the end of the buffer
1138          * then copy the reset from the start of the buffer
1139          */
1140         bytesleft = fifo->size - fifo->head;
1141         firsthalf = min(bytesleft, copySize);
1142         dev_dbg(&port->dev, "%s - copy %d bytes of %d into fifo \n", __func__,
1143                 firsthalf, bytesleft);
1144
1145         /* now copy our data */
1146         memcpy(&fifo->fifo[fifo->head], data, firsthalf);
1147         usb_serial_debug_data(&port->dev, __func__, firsthalf, &fifo->fifo[fifo->head]);
1148
1149         /* update the index and size */
1150         fifo->head  += firsthalf;
1151         fifo->count += firsthalf;
1152
1153         /* wrap the index */
1154         if (fifo->head == fifo->size)
1155                 fifo->head = 0;
1156
1157         secondhalf = copySize-firsthalf;
1158
1159         if (secondhalf) {
1160                 dev_dbg(&port->dev, "%s - copy rest of data %d\n", __func__, secondhalf);
1161                 memcpy(&fifo->fifo[fifo->head], &data[firsthalf], secondhalf);
1162                 usb_serial_debug_data(&port->dev, __func__, secondhalf, &fifo->fifo[fifo->head]);
1163                 /* update the index and size */
1164                 fifo->count += secondhalf;
1165                 fifo->head  += secondhalf;
1166                 /* No need to check for wrap since we can not get to end of
1167                  * the fifo in this part
1168                  */
1169         }
1170
1171 finish_write:
1172         spin_unlock_irqrestore(&edge_port->ep_lock, flags);
1173
1174         send_more_port_data((struct edgeport_serial *)
1175                         usb_get_serial_data(port->serial), edge_port);
1176
1177         dev_dbg(&port->dev, "%s wrote %d byte(s) TxCredits %d, Fifo %d\n",
1178                 __func__, copySize, edge_port->txCredits, fifo->count);
1179
1180         return copySize;
1181 }
1182
1183
1184 /************************************************************************
1185  *
1186  * send_more_port_data()
1187  *
1188  *      This routine attempts to write additional UART transmit data
1189  *      to a port over the USB bulk pipe. It is called (1) when new
1190  *      data has been written to a port's TxBuffer from higher layers
1191  *      (2) when the peripheral sends us additional TxCredits indicating
1192  *      that it can accept more Tx data for a given port; and (3) when
1193  *      a bulk write completes successfully and we want to see if we
1194  *      can transmit more.
1195  *
1196  ************************************************************************/
1197 static void send_more_port_data(struct edgeport_serial *edge_serial,
1198                                         struct edgeport_port *edge_port)
1199 {
1200         struct TxFifo   *fifo = &edge_port->txfifo;
1201         struct device   *dev = &edge_port->port->dev;
1202         struct urb      *urb;
1203         unsigned char   *buffer;
1204         int             status;
1205         int             count;
1206         int             bytesleft;
1207         int             firsthalf;
1208         int             secondhalf;
1209         unsigned long   flags;
1210
1211         spin_lock_irqsave(&edge_port->ep_lock, flags);
1212
1213         if (edge_port->write_in_progress ||
1214             !edge_port->open             ||
1215             (fifo->count == 0)) {
1216                 dev_dbg(dev, "%s EXIT - fifo %d, PendingWrite = %d\n",
1217                         __func__, fifo->count, edge_port->write_in_progress);
1218                 goto exit_send;
1219         }
1220
1221         /* since the amount of data in the fifo will always fit into the
1222          * edgeport buffer we do not need to check the write length
1223          *
1224          * Do we have enough credits for this port to make it worthwhile
1225          * to bother queueing a write. If it's too small, say a few bytes,
1226          * it's better to wait for more credits so we can do a larger write.
1227          */
1228         if (edge_port->txCredits < EDGE_FW_GET_TX_CREDITS_SEND_THRESHOLD(edge_port->maxTxCredits, EDGE_FW_BULK_MAX_PACKET_SIZE)) {
1229                 dev_dbg(dev, "%s Not enough credit - fifo %d TxCredit %d\n",
1230                         __func__, fifo->count, edge_port->txCredits);
1231                 goto exit_send;
1232         }
1233
1234         /* lock this write */
1235         edge_port->write_in_progress = true;
1236
1237         /* get a pointer to the write_urb */
1238         urb = edge_port->write_urb;
1239
1240         /* make sure transfer buffer is freed */
1241         kfree(urb->transfer_buffer);
1242         urb->transfer_buffer = NULL;
1243
1244         /* build the data header for the buffer and port that we are about
1245            to send out */
1246         count = fifo->count;
1247         buffer = kmalloc(count+2, GFP_ATOMIC);
1248         if (buffer == NULL) {
1249                 dev_err_console(edge_port->port,
1250                                 "%s - no more kernel memory...\n", __func__);
1251                 edge_port->write_in_progress = false;
1252                 goto exit_send;
1253         }
1254         buffer[0] = IOSP_BUILD_DATA_HDR1(edge_port->port->port_number, count);
1255         buffer[1] = IOSP_BUILD_DATA_HDR2(edge_port->port->port_number, count);
1256
1257         /* now copy our data */
1258         bytesleft =  fifo->size - fifo->tail;
1259         firsthalf = min(bytesleft, count);
1260         memcpy(&buffer[2], &fifo->fifo[fifo->tail], firsthalf);
1261         fifo->tail  += firsthalf;
1262         fifo->count -= firsthalf;
1263         if (fifo->tail == fifo->size)
1264                 fifo->tail = 0;
1265
1266         secondhalf = count-firsthalf;
1267         if (secondhalf) {
1268                 memcpy(&buffer[2+firsthalf], &fifo->fifo[fifo->tail],
1269                                                                 secondhalf);
1270                 fifo->tail  += secondhalf;
1271                 fifo->count -= secondhalf;
1272         }
1273
1274         if (count)
1275                 usb_serial_debug_data(&edge_port->port->dev, __func__, count, &buffer[2]);
1276
1277         /* fill up the urb with all of our data and submit it */
1278         usb_fill_bulk_urb(urb, edge_serial->serial->dev,
1279                         usb_sndbulkpipe(edge_serial->serial->dev,
1280                                         edge_serial->bulk_out_endpoint),
1281                         buffer, count+2,
1282                         edge_bulk_out_data_callback, edge_port);
1283
1284         /* decrement the number of credits we have by the number we just sent */
1285         edge_port->txCredits -= count;
1286         edge_port->port->icount.tx += count;
1287
1288         status = usb_submit_urb(urb, GFP_ATOMIC);
1289         if (status) {
1290                 /* something went wrong */
1291                 dev_err_console(edge_port->port,
1292                         "%s - usb_submit_urb(write bulk) failed, status = %d, data lost\n",
1293                                 __func__, status);
1294                 edge_port->write_in_progress = false;
1295
1296                 /* revert the credits as something bad happened. */
1297                 edge_port->txCredits += count;
1298                 edge_port->port->icount.tx -= count;
1299         }
1300         dev_dbg(dev, "%s wrote %d byte(s) TxCredit %d, Fifo %d\n",
1301                 __func__, count, edge_port->txCredits, fifo->count);
1302
1303 exit_send:
1304         spin_unlock_irqrestore(&edge_port->ep_lock, flags);
1305 }
1306
1307
1308 /*****************************************************************************
1309  * edge_write_room
1310  *      this function is called by the tty driver when it wants to know how
1311  *      many bytes of data we can accept for a specific port. If successful,
1312  *      we return the amount of room that we have for this port (the txCredits)
1313  *      otherwise we return a negative error number.
1314  *****************************************************************************/
1315 static int edge_write_room(struct tty_struct *tty)
1316 {
1317         struct usb_serial_port *port = tty->driver_data;
1318         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1319         int room;
1320         unsigned long flags;
1321
1322         if (edge_port == NULL)
1323                 return 0;
1324         if (edge_port->closePending)
1325                 return 0;
1326
1327         if (!edge_port->open) {
1328                 dev_dbg(&port->dev, "%s - port not opened\n", __func__);
1329                 return 0;
1330         }
1331
1332         /* total of both buffers is still txCredit */
1333         spin_lock_irqsave(&edge_port->ep_lock, flags);
1334         room = edge_port->txCredits - edge_port->txfifo.count;
1335         spin_unlock_irqrestore(&edge_port->ep_lock, flags);
1336
1337         dev_dbg(&port->dev, "%s - returns %d\n", __func__, room);
1338         return room;
1339 }
1340
1341
1342 /*****************************************************************************
1343  * edge_chars_in_buffer
1344  *      this function is called by the tty driver when it wants to know how
1345  *      many bytes of data we currently have outstanding in the port (data that
1346  *      has been written, but hasn't made it out the port yet)
1347  *      If successful, we return the number of bytes left to be written in the
1348  *      system,
1349  *      Otherwise we return a negative error number.
1350  *****************************************************************************/
1351 static int edge_chars_in_buffer(struct tty_struct *tty)
1352 {
1353         struct usb_serial_port *port = tty->driver_data;
1354         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1355         int num_chars;
1356         unsigned long flags;
1357
1358         if (edge_port == NULL)
1359                 return 0;
1360         if (edge_port->closePending)
1361                 return 0;
1362
1363         if (!edge_port->open) {
1364                 dev_dbg(&port->dev, "%s - port not opened\n", __func__);
1365                 return 0;
1366         }
1367
1368         spin_lock_irqsave(&edge_port->ep_lock, flags);
1369         num_chars = edge_port->maxTxCredits - edge_port->txCredits +
1370                                                 edge_port->txfifo.count;
1371         spin_unlock_irqrestore(&edge_port->ep_lock, flags);
1372         if (num_chars) {
1373                 dev_dbg(&port->dev, "%s - returns %d\n", __func__, num_chars);
1374         }
1375
1376         return num_chars;
1377 }
1378
1379
1380 /*****************************************************************************
1381  * SerialThrottle
1382  *      this function is called by the tty driver when it wants to stop the data
1383  *      being read from the port.
1384  *****************************************************************************/
1385 static void edge_throttle(struct tty_struct *tty)
1386 {
1387         struct usb_serial_port *port = tty->driver_data;
1388         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1389         int status;
1390
1391         if (edge_port == NULL)
1392                 return;
1393
1394         if (!edge_port->open) {
1395                 dev_dbg(&port->dev, "%s - port not opened\n", __func__);
1396                 return;
1397         }
1398
1399         /* if we are implementing XON/XOFF, send the stop character */
1400         if (I_IXOFF(tty)) {
1401                 unsigned char stop_char = STOP_CHAR(tty);
1402                 status = edge_write(tty, port, &stop_char, 1);
1403                 if (status <= 0)
1404                         return;
1405         }
1406
1407         /* if we are implementing RTS/CTS, toggle that line */
1408         if (tty->termios.c_cflag & CRTSCTS) {
1409                 edge_port->shadowMCR &= ~MCR_RTS;
1410                 status = send_cmd_write_uart_register(edge_port, MCR,
1411                                                         edge_port->shadowMCR);
1412                 if (status != 0)
1413                         return;
1414         }
1415 }
1416
1417
1418 /*****************************************************************************
1419  * edge_unthrottle
1420  *      this function is called by the tty driver when it wants to resume the
1421  *      data being read from the port (called after SerialThrottle is called)
1422  *****************************************************************************/
1423 static void edge_unthrottle(struct tty_struct *tty)
1424 {
1425         struct usb_serial_port *port = tty->driver_data;
1426         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1427         int status;
1428
1429         if (edge_port == NULL)
1430                 return;
1431
1432         if (!edge_port->open) {
1433                 dev_dbg(&port->dev, "%s - port not opened\n", __func__);
1434                 return;
1435         }
1436
1437         /* if we are implementing XON/XOFF, send the start character */
1438         if (I_IXOFF(tty)) {
1439                 unsigned char start_char = START_CHAR(tty);
1440                 status = edge_write(tty, port, &start_char, 1);
1441                 if (status <= 0)
1442                         return;
1443         }
1444         /* if we are implementing RTS/CTS, toggle that line */
1445         if (tty->termios.c_cflag & CRTSCTS) {
1446                 edge_port->shadowMCR |= MCR_RTS;
1447                 send_cmd_write_uart_register(edge_port, MCR,
1448                                                 edge_port->shadowMCR);
1449         }
1450 }
1451
1452
1453 /*****************************************************************************
1454  * SerialSetTermios
1455  *      this function is called by the tty driver when it wants to change
1456  * the termios structure
1457  *****************************************************************************/
1458 static void edge_set_termios(struct tty_struct *tty,
1459         struct usb_serial_port *port, struct ktermios *old_termios)
1460 {
1461         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1462         unsigned int cflag;
1463
1464         cflag = tty->termios.c_cflag;
1465         dev_dbg(&port->dev, "%s - clfag %08x iflag %08x\n", __func__, tty->termios.c_cflag, tty->termios.c_iflag);
1466         dev_dbg(&port->dev, "%s - old clfag %08x old iflag %08x\n", __func__, old_termios->c_cflag, old_termios->c_iflag);
1467
1468         if (edge_port == NULL)
1469                 return;
1470
1471         if (!edge_port->open) {
1472                 dev_dbg(&port->dev, "%s - port not opened\n", __func__);
1473                 return;
1474         }
1475
1476         /* change the port settings to the new ones specified */
1477         change_port_settings(tty, edge_port, old_termios);
1478 }
1479
1480
1481 /*****************************************************************************
1482  * get_lsr_info - get line status register info
1483  *
1484  * Purpose: Let user call ioctl() to get info when the UART physically
1485  *          is emptied.  On bus types like RS485, the transmitter must
1486  *          release the bus after transmitting. This must be done when
1487  *          the transmit shift register is empty, not be done when the
1488  *          transmit holding register is empty.  This functionality
1489  *          allows an RS485 driver to be written in user space.
1490  *****************************************************************************/
1491 static int get_lsr_info(struct edgeport_port *edge_port,
1492                                                 unsigned int __user *value)
1493 {
1494         unsigned int result = 0;
1495         unsigned long flags;
1496
1497         spin_lock_irqsave(&edge_port->ep_lock, flags);
1498         if (edge_port->maxTxCredits == edge_port->txCredits &&
1499             edge_port->txfifo.count == 0) {
1500                 dev_dbg(&edge_port->port->dev, "%s -- Empty\n", __func__);
1501                 result = TIOCSER_TEMT;
1502         }
1503         spin_unlock_irqrestore(&edge_port->ep_lock, flags);
1504
1505         if (copy_to_user(value, &result, sizeof(int)))
1506                 return -EFAULT;
1507         return 0;
1508 }
1509
1510 static int edge_tiocmset(struct tty_struct *tty,
1511                                         unsigned int set, unsigned int clear)
1512 {
1513         struct usb_serial_port *port = tty->driver_data;
1514         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1515         unsigned int mcr;
1516
1517         mcr = edge_port->shadowMCR;
1518         if (set & TIOCM_RTS)
1519                 mcr |= MCR_RTS;
1520         if (set & TIOCM_DTR)
1521                 mcr |= MCR_DTR;
1522         if (set & TIOCM_LOOP)
1523                 mcr |= MCR_LOOPBACK;
1524
1525         if (clear & TIOCM_RTS)
1526                 mcr &= ~MCR_RTS;
1527         if (clear & TIOCM_DTR)
1528                 mcr &= ~MCR_DTR;
1529         if (clear & TIOCM_LOOP)
1530                 mcr &= ~MCR_LOOPBACK;
1531
1532         edge_port->shadowMCR = mcr;
1533
1534         send_cmd_write_uart_register(edge_port, MCR, edge_port->shadowMCR);
1535
1536         return 0;
1537 }
1538
1539 static int edge_tiocmget(struct tty_struct *tty)
1540 {
1541         struct usb_serial_port *port = tty->driver_data;
1542         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1543         unsigned int result = 0;
1544         unsigned int msr;
1545         unsigned int mcr;
1546
1547         msr = edge_port->shadowMSR;
1548         mcr = edge_port->shadowMCR;
1549         result = ((mcr & MCR_DTR)       ? TIOCM_DTR: 0)   /* 0x002 */
1550                   | ((mcr & MCR_RTS)    ? TIOCM_RTS: 0)   /* 0x004 */
1551                   | ((msr & EDGEPORT_MSR_CTS)   ? TIOCM_CTS: 0)   /* 0x020 */
1552                   | ((msr & EDGEPORT_MSR_CD)    ? TIOCM_CAR: 0)   /* 0x040 */
1553                   | ((msr & EDGEPORT_MSR_RI)    ? TIOCM_RI:  0)   /* 0x080 */
1554                   | ((msr & EDGEPORT_MSR_DSR)   ? TIOCM_DSR: 0);  /* 0x100 */
1555
1556         return result;
1557 }
1558
1559 static int get_serial_info(struct edgeport_port *edge_port,
1560                                 struct serial_struct __user *retinfo)
1561 {
1562         struct serial_struct tmp;
1563
1564         if (!retinfo)
1565                 return -EFAULT;
1566
1567         memset(&tmp, 0, sizeof(tmp));
1568
1569         tmp.type                = PORT_16550A;
1570         tmp.line                = edge_port->port->minor;
1571         tmp.port                = edge_port->port->port_number;
1572         tmp.irq                 = 0;
1573         tmp.flags               = ASYNC_SKIP_TEST | ASYNC_AUTO_IRQ;
1574         tmp.xmit_fifo_size      = edge_port->maxTxCredits;
1575         tmp.baud_base           = 9600;
1576         tmp.close_delay         = 5*HZ;
1577         tmp.closing_wait        = 30*HZ;
1578
1579         if (copy_to_user(retinfo, &tmp, sizeof(*retinfo)))
1580                 return -EFAULT;
1581         return 0;
1582 }
1583
1584
1585 /*****************************************************************************
1586  * SerialIoctl
1587  *      this function handles any ioctl calls to the driver
1588  *****************************************************************************/
1589 static int edge_ioctl(struct tty_struct *tty,
1590                                         unsigned int cmd, unsigned long arg)
1591 {
1592         struct usb_serial_port *port = tty->driver_data;
1593         DEFINE_WAIT(wait);
1594         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1595
1596         dev_dbg(&port->dev, "%s - cmd = 0x%x\n", __func__, cmd);
1597
1598         switch (cmd) {
1599         case TIOCSERGETLSR:
1600                 dev_dbg(&port->dev, "%s TIOCSERGETLSR\n", __func__);
1601                 return get_lsr_info(edge_port, (unsigned int __user *) arg);
1602
1603         case TIOCGSERIAL:
1604                 dev_dbg(&port->dev, "%s TIOCGSERIAL\n", __func__);
1605                 return get_serial_info(edge_port, (struct serial_struct __user *) arg);
1606         }
1607         return -ENOIOCTLCMD;
1608 }
1609
1610
1611 /*****************************************************************************
1612  * SerialBreak
1613  *      this function sends a break to the port
1614  *****************************************************************************/
1615 static void edge_break(struct tty_struct *tty, int break_state)
1616 {
1617         struct usb_serial_port *port = tty->driver_data;
1618         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1619         struct edgeport_serial *edge_serial = usb_get_serial_data(port->serial);
1620         int status;
1621
1622         if ((!edge_serial->is_epic) ||
1623             ((edge_serial->is_epic) &&
1624              (edge_serial->epic_descriptor.Supports.IOSPChase))) {
1625                 /* flush and chase */
1626                 edge_port->chaseResponsePending = true;
1627
1628                 dev_dbg(&port->dev, "%s - Sending IOSP_CMD_CHASE_PORT\n", __func__);
1629                 status = send_iosp_ext_cmd(edge_port, IOSP_CMD_CHASE_PORT, 0);
1630                 if (status == 0) {
1631                         /* block until chase finished */
1632                         block_until_chase_response(edge_port);
1633                 } else {
1634                         edge_port->chaseResponsePending = false;
1635                 }
1636         }
1637
1638         if ((!edge_serial->is_epic) ||
1639             ((edge_serial->is_epic) &&
1640              (edge_serial->epic_descriptor.Supports.IOSPSetClrBreak))) {
1641                 if (break_state == -1) {
1642                         dev_dbg(&port->dev, "%s - Sending IOSP_CMD_SET_BREAK\n", __func__);
1643                         status = send_iosp_ext_cmd(edge_port,
1644                                                 IOSP_CMD_SET_BREAK, 0);
1645                 } else {
1646                         dev_dbg(&port->dev, "%s - Sending IOSP_CMD_CLEAR_BREAK\n", __func__);
1647                         status = send_iosp_ext_cmd(edge_port,
1648                                                 IOSP_CMD_CLEAR_BREAK, 0);
1649                 }
1650                 if (status)
1651                         dev_dbg(&port->dev, "%s - error sending break set/clear command.\n",
1652                                 __func__);
1653         }
1654 }
1655
1656
1657 /*****************************************************************************
1658  * process_rcvd_data
1659  *      this function handles the data received on the bulk in pipe.
1660  *****************************************************************************/
1661 static void process_rcvd_data(struct edgeport_serial *edge_serial,
1662                                 unsigned char *buffer, __u16 bufferLength)
1663 {
1664         struct device *dev = &edge_serial->serial->dev->dev;
1665         struct usb_serial_port *port;
1666         struct edgeport_port *edge_port;
1667         __u16 lastBufferLength;
1668         __u16 rxLen;
1669
1670         lastBufferLength = bufferLength + 1;
1671
1672         while (bufferLength > 0) {
1673                 /* failsafe incase we get a message that we don't understand */
1674                 if (lastBufferLength == bufferLength) {
1675                         dev_dbg(dev, "%s - stuck in loop, exiting it.\n", __func__);
1676                         break;
1677                 }
1678                 lastBufferLength = bufferLength;
1679
1680                 switch (edge_serial->rxState) {
1681                 case EXPECT_HDR1:
1682                         edge_serial->rxHeader1 = *buffer;
1683                         ++buffer;
1684                         --bufferLength;
1685
1686                         if (bufferLength == 0) {
1687                                 edge_serial->rxState = EXPECT_HDR2;
1688                                 break;
1689                         }
1690                         /* otherwise, drop on through */
1691                 case EXPECT_HDR2:
1692                         edge_serial->rxHeader2 = *buffer;
1693                         ++buffer;
1694                         --bufferLength;
1695
1696                         dev_dbg(dev, "%s - Hdr1=%02X Hdr2=%02X\n", __func__,
1697                                 edge_serial->rxHeader1, edge_serial->rxHeader2);
1698                         /* Process depending on whether this header is
1699                          * data or status */
1700
1701                         if (IS_CMD_STAT_HDR(edge_serial->rxHeader1)) {
1702                                 /* Decode this status header and go to
1703                                  * EXPECT_HDR1 (if we can process the status
1704                                  * with only 2 bytes), or go to EXPECT_HDR3 to
1705                                  * get the third byte. */
1706                                 edge_serial->rxPort =
1707                                     IOSP_GET_HDR_PORT(edge_serial->rxHeader1);
1708                                 edge_serial->rxStatusCode =
1709                                     IOSP_GET_STATUS_CODE(
1710                                                 edge_serial->rxHeader1);
1711
1712                                 if (!IOSP_STATUS_IS_2BYTE(
1713                                                 edge_serial->rxStatusCode)) {
1714                                         /* This status needs additional bytes.
1715                                          * Save what we have and then wait for
1716                                          * more data.
1717                                          */
1718                                         edge_serial->rxStatusParam
1719                                                 = edge_serial->rxHeader2;
1720                                         edge_serial->rxState = EXPECT_HDR3;
1721                                         break;
1722                                 }
1723                                 /* We have all the header bytes, process the
1724                                    status now */
1725                                 process_rcvd_status(edge_serial,
1726                                                 edge_serial->rxHeader2, 0);
1727                                 edge_serial->rxState = EXPECT_HDR1;
1728                                 break;
1729                         } else {
1730                                 edge_serial->rxPort =
1731                                     IOSP_GET_HDR_PORT(edge_serial->rxHeader1);
1732                                 edge_serial->rxBytesRemaining =
1733                                     IOSP_GET_HDR_DATA_LEN(
1734                                                 edge_serial->rxHeader1,
1735                                                 edge_serial->rxHeader2);
1736                                 dev_dbg(dev, "%s - Data for Port %u Len %u\n",
1737                                         __func__,
1738                                         edge_serial->rxPort,
1739                                         edge_serial->rxBytesRemaining);
1740
1741                                 /* ASSERT(DevExt->RxPort < DevExt->NumPorts);
1742                                  * ASSERT(DevExt->RxBytesRemaining <
1743                                  *              IOSP_MAX_DATA_LENGTH);
1744                                  */
1745
1746                                 if (bufferLength == 0) {
1747                                         edge_serial->rxState = EXPECT_DATA;
1748                                         break;
1749                                 }
1750                                 /* Else, drop through */
1751                         }
1752                 case EXPECT_DATA: /* Expect data */
1753                         if (bufferLength < edge_serial->rxBytesRemaining) {
1754                                 rxLen = bufferLength;
1755                                 /* Expect data to start next buffer */
1756                                 edge_serial->rxState = EXPECT_DATA;
1757                         } else {
1758                                 /* BufLen >= RxBytesRemaining */
1759                                 rxLen = edge_serial->rxBytesRemaining;
1760                                 /* Start another header next time */
1761                                 edge_serial->rxState = EXPECT_HDR1;
1762                         }
1763
1764                         bufferLength -= rxLen;
1765                         edge_serial->rxBytesRemaining -= rxLen;
1766
1767                         /* spit this data back into the tty driver if this
1768                            port is open */
1769                         if (rxLen) {
1770                                 port = edge_serial->serial->port[
1771                                                         edge_serial->rxPort];
1772                                 edge_port = usb_get_serial_port_data(port);
1773                                 if (edge_port->open) {
1774                                         dev_dbg(dev, "%s - Sending %d bytes to TTY for port %d\n",
1775                                                 __func__, rxLen,
1776                                                 edge_serial->rxPort);
1777                                         edge_tty_recv(edge_port->port, buffer,
1778                                                         rxLen);
1779                                         edge_port->port->icount.rx += rxLen;
1780                                 }
1781                                 buffer += rxLen;
1782                         }
1783                         break;
1784
1785                 case EXPECT_HDR3:       /* Expect 3rd byte of status header */
1786                         edge_serial->rxHeader3 = *buffer;
1787                         ++buffer;
1788                         --bufferLength;
1789
1790                         /* We have all the header bytes, process the
1791                            status now */
1792                         process_rcvd_status(edge_serial,
1793                                 edge_serial->rxStatusParam,
1794                                 edge_serial->rxHeader3);
1795                         edge_serial->rxState = EXPECT_HDR1;
1796                         break;
1797                 }
1798         }
1799 }
1800
1801
1802 /*****************************************************************************
1803  * process_rcvd_status
1804  *      this function handles the any status messages received on the
1805  *      bulk in pipe.
1806  *****************************************************************************/
1807 static void process_rcvd_status(struct edgeport_serial *edge_serial,
1808                                                 __u8 byte2, __u8 byte3)
1809 {
1810         struct usb_serial_port *port;
1811         struct edgeport_port *edge_port;
1812         struct tty_struct *tty;
1813         struct device *dev;
1814         __u8 code = edge_serial->rxStatusCode;
1815
1816         /* switch the port pointer to the one being currently talked about */
1817         port = edge_serial->serial->port[edge_serial->rxPort];
1818         edge_port = usb_get_serial_port_data(port);
1819         if (edge_port == NULL) {
1820                 dev_err(&edge_serial->serial->dev->dev,
1821                         "%s - edge_port == NULL for port %d\n",
1822                                         __func__, edge_serial->rxPort);
1823                 return;
1824         }
1825         dev = &port->dev;
1826
1827         if (code == IOSP_EXT_STATUS) {
1828                 switch (byte2) {
1829                 case IOSP_EXT_STATUS_CHASE_RSP:
1830                         /* we want to do EXT status regardless of port
1831                          * open/closed */
1832                         dev_dbg(dev, "%s - Port %u EXT CHASE_RSP Data = %02x\n",
1833                                 __func__, edge_serial->rxPort, byte3);
1834                         /* Currently, the only EXT_STATUS is Chase, so process
1835                          * here instead of one more call to one more subroutine
1836                          * If/when more EXT_STATUS, there'll be more work to do
1837                          * Also, we currently clear flag and close the port
1838                          * regardless of content of above's Byte3.
1839                          * We could choose to do something else when Byte3 says
1840                          * Timeout on Chase from Edgeport, like wait longer in
1841                          * block_until_chase_response, but for now we don't.
1842                          */
1843                         edge_port->chaseResponsePending = false;
1844                         wake_up(&edge_port->wait_chase);
1845                         return;
1846
1847                 case IOSP_EXT_STATUS_RX_CHECK_RSP:
1848                         dev_dbg(dev, "%s ========== Port %u CHECK_RSP Sequence = %02x =============\n",
1849                                 __func__, edge_serial->rxPort, byte3);
1850                         /* Port->RxCheckRsp = true; */
1851                         return;
1852                 }
1853         }
1854
1855         if (code == IOSP_STATUS_OPEN_RSP) {
1856                 edge_port->txCredits = GET_TX_BUFFER_SIZE(byte3);
1857                 edge_port->maxTxCredits = edge_port->txCredits;
1858                 dev_dbg(dev, "%s - Port %u Open Response Initial MSR = %02x TxBufferSize = %d\n",
1859                         __func__, edge_serial->rxPort, byte2, edge_port->txCredits);
1860                 handle_new_msr(edge_port, byte2);
1861
1862                 /* send the current line settings to the port so we are
1863                    in sync with any further termios calls */
1864                 tty = tty_port_tty_get(&edge_port->port->port);
1865                 if (tty) {
1866                         change_port_settings(tty,
1867                                 edge_port, &tty->termios);
1868                         tty_kref_put(tty);
1869                 }
1870
1871                 /* we have completed the open */
1872                 edge_port->openPending = false;
1873                 edge_port->open = true;
1874                 wake_up(&edge_port->wait_open);
1875                 return;
1876         }
1877
1878         /* If port is closed, silently discard all rcvd status. We can
1879          * have cases where buffered status is received AFTER the close
1880          * port command is sent to the Edgeport.
1881          */
1882         if (!edge_port->open || edge_port->closePending)
1883                 return;
1884
1885         switch (code) {
1886         /* Not currently sent by Edgeport */
1887         case IOSP_STATUS_LSR:
1888                 dev_dbg(dev, "%s - Port %u LSR Status = %02x\n",
1889                         __func__, edge_serial->rxPort, byte2);
1890                 handle_new_lsr(edge_port, false, byte2, 0);
1891                 break;
1892
1893         case IOSP_STATUS_LSR_DATA:
1894                 dev_dbg(dev, "%s - Port %u LSR Status = %02x, Data = %02x\n",
1895                         __func__, edge_serial->rxPort, byte2, byte3);
1896                 /* byte2 is LSR Register */
1897                 /* byte3 is broken data byte */
1898                 handle_new_lsr(edge_port, true, byte2, byte3);
1899                 break;
1900         /*
1901          *      case IOSP_EXT_4_STATUS:
1902          *              dev_dbg(dev, "%s - Port %u LSR Status = %02x Data = %02x\n",
1903          *                      __func__, edge_serial->rxPort, byte2, byte3);
1904          *              break;
1905          */
1906         case IOSP_STATUS_MSR:
1907                 dev_dbg(dev, "%s - Port %u MSR Status = %02x\n",
1908                         __func__, edge_serial->rxPort, byte2);
1909                 /*
1910                  * Process this new modem status and generate appropriate
1911                  * events, etc, based on the new status. This routine
1912                  * also saves the MSR in Port->ShadowMsr.
1913                  */
1914                 handle_new_msr(edge_port, byte2);
1915                 break;
1916
1917         default:
1918                 dev_dbg(dev, "%s - Unrecognized IOSP status code %u\n", __func__, code);
1919                 break;
1920         }
1921 }
1922
1923
1924 /*****************************************************************************
1925  * edge_tty_recv
1926  *      this function passes data on to the tty flip buffer
1927  *****************************************************************************/
1928 static void edge_tty_recv(struct usb_serial_port *port, unsigned char *data,
1929                 int length)
1930 {
1931         int cnt;
1932
1933         cnt = tty_insert_flip_string(&port->port, data, length);
1934         if (cnt < length) {
1935                 dev_err(&port->dev, "%s - dropping data, %d bytes lost\n",
1936                                 __func__, length - cnt);
1937         }
1938         data += cnt;
1939         length -= cnt;
1940
1941         tty_flip_buffer_push(&port->port);
1942 }
1943
1944
1945 /*****************************************************************************
1946  * handle_new_msr
1947  *      this function handles any change to the msr register for a port.
1948  *****************************************************************************/
1949 static void handle_new_msr(struct edgeport_port *edge_port, __u8 newMsr)
1950 {
1951         struct  async_icount *icount;
1952
1953         if (newMsr & (EDGEPORT_MSR_DELTA_CTS | EDGEPORT_MSR_DELTA_DSR |
1954                         EDGEPORT_MSR_DELTA_RI | EDGEPORT_MSR_DELTA_CD)) {
1955                 icount = &edge_port->port->icount;
1956
1957                 /* update input line counters */
1958                 if (newMsr & EDGEPORT_MSR_DELTA_CTS)
1959                         icount->cts++;
1960                 if (newMsr & EDGEPORT_MSR_DELTA_DSR)
1961                         icount->dsr++;
1962                 if (newMsr & EDGEPORT_MSR_DELTA_CD)
1963                         icount->dcd++;
1964                 if (newMsr & EDGEPORT_MSR_DELTA_RI)
1965                         icount->rng++;
1966                 wake_up_interruptible(&edge_port->port->port.delta_msr_wait);
1967         }
1968
1969         /* Save the new modem status */
1970         edge_port->shadowMSR = newMsr & 0xf0;
1971 }
1972
1973
1974 /*****************************************************************************
1975  * handle_new_lsr
1976  *      this function handles any change to the lsr register for a port.
1977  *****************************************************************************/
1978 static void handle_new_lsr(struct edgeport_port *edge_port, __u8 lsrData,
1979                                                         __u8 lsr, __u8 data)
1980 {
1981         __u8 newLsr = (__u8) (lsr & (__u8)
1982                 (LSR_OVER_ERR | LSR_PAR_ERR | LSR_FRM_ERR | LSR_BREAK));
1983         struct async_icount *icount;
1984
1985         edge_port->shadowLSR = lsr;
1986
1987         if (newLsr & LSR_BREAK) {
1988                 /*
1989                  * Parity and Framing errors only count if they
1990                  * occur exclusive of a break being
1991                  * received.
1992                  */
1993                 newLsr &= (__u8)(LSR_OVER_ERR | LSR_BREAK);
1994         }
1995
1996         /* Place LSR data byte into Rx buffer */
1997         if (lsrData)
1998                 edge_tty_recv(edge_port->port, &data, 1);
1999
2000         /* update input line counters */
2001         icount = &edge_port->port->icount;
2002         if (newLsr & LSR_BREAK)
2003                 icount->brk++;
2004         if (newLsr & LSR_OVER_ERR)
2005                 icount->overrun++;
2006         if (newLsr & LSR_PAR_ERR)
2007                 icount->parity++;
2008         if (newLsr & LSR_FRM_ERR)
2009                 icount->frame++;
2010 }
2011
2012
2013 /****************************************************************************
2014  * sram_write
2015  *      writes a number of bytes to the Edgeport device's sram starting at the
2016  *      given address.
2017  *      If successful returns the number of bytes written, otherwise it returns
2018  *      a negative error number of the problem.
2019  ****************************************************************************/
2020 static int sram_write(struct usb_serial *serial, __u16 extAddr, __u16 addr,
2021                                         __u16 length, const __u8 *data)
2022 {
2023         int result;
2024         __u16 current_length;
2025         unsigned char *transfer_buffer;
2026
2027         dev_dbg(&serial->dev->dev, "%s - %x, %x, %d\n", __func__, extAddr, addr, length);
2028
2029         transfer_buffer =  kmalloc(64, GFP_KERNEL);
2030         if (!transfer_buffer) {
2031                 dev_err(&serial->dev->dev, "%s - kmalloc(%d) failed.\n",
2032                                                         __func__, 64);
2033                 return -ENOMEM;
2034         }
2035
2036         /* need to split these writes up into 64 byte chunks */
2037         result = 0;
2038         while (length > 0) {
2039                 if (length > 64)
2040                         current_length = 64;
2041                 else
2042                         current_length = length;
2043
2044 /*              dev_dbg(&serial->dev->dev, "%s - writing %x, %x, %d\n", __func__, extAddr, addr, current_length); */
2045                 memcpy(transfer_buffer, data, current_length);
2046                 result = usb_control_msg(serial->dev,
2047                                         usb_sndctrlpipe(serial->dev, 0),
2048                                         USB_REQUEST_ION_WRITE_RAM,
2049                                         0x40, addr, extAddr, transfer_buffer,
2050                                         current_length, 300);
2051                 if (result < 0)
2052                         break;
2053                 length -= current_length;
2054                 addr += current_length;
2055                 data += current_length;
2056         }
2057
2058         kfree(transfer_buffer);
2059         return result;
2060 }
2061
2062
2063 /****************************************************************************
2064  * rom_write
2065  *      writes a number of bytes to the Edgeport device's ROM starting at the
2066  *      given address.
2067  *      If successful returns the number of bytes written, otherwise it returns
2068  *      a negative error number of the problem.
2069  ****************************************************************************/
2070 static int rom_write(struct usb_serial *serial, __u16 extAddr, __u16 addr,
2071                                         __u16 length, const __u8 *data)
2072 {
2073         int result;
2074         __u16 current_length;
2075         unsigned char *transfer_buffer;
2076
2077         transfer_buffer =  kmalloc(64, GFP_KERNEL);
2078         if (!transfer_buffer) {
2079                 dev_err(&serial->dev->dev, "%s - kmalloc(%d) failed.\n",
2080                                                                 __func__, 64);
2081                 return -ENOMEM;
2082         }
2083
2084         /* need to split these writes up into 64 byte chunks */
2085         result = 0;
2086         while (length > 0) {
2087                 if (length > 64)
2088                         current_length = 64;
2089                 else
2090                         current_length = length;
2091                 memcpy(transfer_buffer, data, current_length);
2092                 result = usb_control_msg(serial->dev,
2093                                         usb_sndctrlpipe(serial->dev, 0),
2094                                         USB_REQUEST_ION_WRITE_ROM, 0x40,
2095                                         addr, extAddr,
2096                                         transfer_buffer, current_length, 300);
2097                 if (result < 0)
2098                         break;
2099                 length -= current_length;
2100                 addr += current_length;
2101                 data += current_length;
2102         }
2103
2104         kfree(transfer_buffer);
2105         return result;
2106 }
2107
2108
2109 /****************************************************************************
2110  * rom_read
2111  *      reads a number of bytes from the Edgeport device starting at the given
2112  *      address.
2113  *      If successful returns the number of bytes read, otherwise it returns
2114  *      a negative error number of the problem.
2115  ****************************************************************************/
2116 static int rom_read(struct usb_serial *serial, __u16 extAddr,
2117                                         __u16 addr, __u16 length, __u8 *data)
2118 {
2119         int result;
2120         __u16 current_length;
2121         unsigned char *transfer_buffer;
2122
2123         transfer_buffer =  kmalloc(64, GFP_KERNEL);
2124         if (!transfer_buffer) {
2125                 dev_err(&serial->dev->dev,
2126                         "%s - kmalloc(%d) failed.\n", __func__, 64);
2127                 return -ENOMEM;
2128         }
2129
2130         /* need to split these reads up into 64 byte chunks */
2131         result = 0;
2132         while (length > 0) {
2133                 if (length > 64)
2134                         current_length = 64;
2135                 else
2136                         current_length = length;
2137                 result = usb_control_msg(serial->dev,
2138                                         usb_rcvctrlpipe(serial->dev, 0),
2139                                         USB_REQUEST_ION_READ_ROM,
2140                                         0xC0, addr, extAddr, transfer_buffer,
2141                                         current_length, 300);
2142                 if (result < 0)
2143                         break;
2144                 memcpy(data, transfer_buffer, current_length);
2145                 length -= current_length;
2146                 addr += current_length;
2147                 data += current_length;
2148         }
2149
2150         kfree(transfer_buffer);
2151         return result;
2152 }
2153
2154
2155 /****************************************************************************
2156  * send_iosp_ext_cmd
2157  *      Is used to send a IOSP message to the Edgeport device
2158  ****************************************************************************/
2159 static int send_iosp_ext_cmd(struct edgeport_port *edge_port,
2160                                                 __u8 command, __u8 param)
2161 {
2162         unsigned char   *buffer;
2163         unsigned char   *currentCommand;
2164         int             length = 0;
2165         int             status = 0;
2166
2167         buffer = kmalloc(10, GFP_ATOMIC);
2168         if (!buffer) {
2169                 dev_err(&edge_port->port->dev,
2170                                 "%s - kmalloc(%d) failed.\n", __func__, 10);
2171                 return -ENOMEM;
2172         }
2173
2174         currentCommand = buffer;
2175
2176         MAKE_CMD_EXT_CMD(&currentCommand, &length, edge_port->port->port_number,
2177                          command, param);
2178
2179         status = write_cmd_usb(edge_port, buffer, length);
2180         if (status) {
2181                 /* something bad happened, let's free up the memory */
2182                 kfree(buffer);
2183         }
2184
2185         return status;
2186 }
2187
2188
2189 /*****************************************************************************
2190  * write_cmd_usb
2191  *      this function writes the given buffer out to the bulk write endpoint.
2192  *****************************************************************************/
2193 static int write_cmd_usb(struct edgeport_port *edge_port,
2194                                         unsigned char *buffer, int length)
2195 {
2196         struct edgeport_serial *edge_serial =
2197                                 usb_get_serial_data(edge_port->port->serial);
2198         struct device *dev = &edge_port->port->dev;
2199         int status = 0;
2200         struct urb *urb;
2201
2202         usb_serial_debug_data(dev, __func__, length, buffer);
2203
2204         /* Allocate our next urb */
2205         urb = usb_alloc_urb(0, GFP_ATOMIC);
2206         if (!urb)
2207                 return -ENOMEM;
2208
2209         atomic_inc(&CmdUrbs);
2210         dev_dbg(dev, "%s - ALLOCATE URB %p (outstanding %d)\n",
2211                 __func__, urb, atomic_read(&CmdUrbs));
2212
2213         usb_fill_bulk_urb(urb, edge_serial->serial->dev,
2214                         usb_sndbulkpipe(edge_serial->serial->dev,
2215                                         edge_serial->bulk_out_endpoint),
2216                         buffer, length, edge_bulk_out_cmd_callback, edge_port);
2217
2218         edge_port->commandPending = true;
2219         status = usb_submit_urb(urb, GFP_ATOMIC);
2220
2221         if (status) {
2222                 /* something went wrong */
2223                 dev_err(dev, "%s - usb_submit_urb(write command) failed, status = %d\n",
2224                         __func__, status);
2225                 usb_kill_urb(urb);
2226                 usb_free_urb(urb);
2227                 atomic_dec(&CmdUrbs);
2228                 return status;
2229         }
2230
2231 #if 0
2232         wait_event(&edge_port->wait_command, !edge_port->commandPending);
2233
2234         if (edge_port->commandPending) {
2235                 /* command timed out */
2236                 dev_dbg(dev, "%s - command timed out\n", __func__);
2237                 status = -EINVAL;
2238         }
2239 #endif
2240         return status;
2241 }
2242
2243
2244 /*****************************************************************************
2245  * send_cmd_write_baud_rate
2246  *      this function sends the proper command to change the baud rate of the
2247  *      specified port.
2248  *****************************************************************************/
2249 static int send_cmd_write_baud_rate(struct edgeport_port *edge_port,
2250                                                                 int baudRate)
2251 {
2252         struct edgeport_serial *edge_serial =
2253                                 usb_get_serial_data(edge_port->port->serial);
2254         struct device *dev = &edge_port->port->dev;
2255         unsigned char *cmdBuffer;
2256         unsigned char *currCmd;
2257         int cmdLen = 0;
2258         int divisor;
2259         int status;
2260         u32 number = edge_port->port->port_number;
2261
2262         if (edge_serial->is_epic &&
2263             !edge_serial->epic_descriptor.Supports.IOSPSetBaudRate) {
2264                 dev_dbg(dev, "SendCmdWriteBaudRate - NOT Setting baud rate for port, baud = %d\n",
2265                         baudRate);
2266                 return 0;
2267         }
2268
2269         dev_dbg(dev, "%s - baud = %d\n", __func__, baudRate);
2270
2271         status = calc_baud_rate_divisor(dev, baudRate, &divisor);
2272         if (status) {
2273                 dev_err(dev, "%s - bad baud rate\n", __func__);
2274                 return status;
2275         }
2276
2277         /* Alloc memory for the string of commands. */
2278         cmdBuffer =  kmalloc(0x100, GFP_ATOMIC);
2279         if (!cmdBuffer) {
2280                 dev_err(dev, "%s - kmalloc(%d) failed.\n", __func__, 0x100);
2281                 return -ENOMEM;
2282         }
2283         currCmd = cmdBuffer;
2284
2285         /* Enable access to divisor latch */
2286         MAKE_CMD_WRITE_REG(&currCmd, &cmdLen, number, LCR, LCR_DL_ENABLE);
2287
2288         /* Write the divisor itself */
2289         MAKE_CMD_WRITE_REG(&currCmd, &cmdLen, number, DLL, LOW8(divisor));
2290         MAKE_CMD_WRITE_REG(&currCmd, &cmdLen, number, DLM, HIGH8(divisor));
2291
2292         /* Restore original value to disable access to divisor latch */
2293         MAKE_CMD_WRITE_REG(&currCmd, &cmdLen, number, LCR,
2294                                                 edge_port->shadowLCR);
2295
2296         status = write_cmd_usb(edge_port, cmdBuffer, cmdLen);
2297         if (status) {
2298                 /* something bad happened, let's free up the memory */
2299                 kfree(cmdBuffer);
2300         }
2301
2302         return status;
2303 }
2304
2305
2306 /*****************************************************************************
2307  * calc_baud_rate_divisor
2308  *      this function calculates the proper baud rate divisor for the specified
2309  *      baud rate.
2310  *****************************************************************************/
2311 static int calc_baud_rate_divisor(struct device *dev, int baudrate, int *divisor)
2312 {
2313         int i;
2314         __u16 custom;
2315
2316         for (i = 0; i < ARRAY_SIZE(divisor_table); i++) {
2317                 if (divisor_table[i].BaudRate == baudrate) {
2318                         *divisor = divisor_table[i].Divisor;
2319                         return 0;
2320                 }
2321         }
2322
2323         /* We have tried all of the standard baud rates
2324          * lets try to calculate the divisor for this baud rate
2325          * Make sure the baud rate is reasonable */
2326         if (baudrate > 50 && baudrate < 230400) {
2327                 /* get divisor */
2328                 custom = (__u16)((230400L + baudrate/2) / baudrate);
2329
2330                 *divisor = custom;
2331
2332                 dev_dbg(dev, "%s - Baud %d = %d\n", __func__, baudrate, custom);
2333                 return 0;
2334         }
2335
2336         return -1;
2337 }
2338
2339
2340 /*****************************************************************************
2341  * send_cmd_write_uart_register
2342  *  this function builds up a uart register message and sends to the device.
2343  *****************************************************************************/
2344 static int send_cmd_write_uart_register(struct edgeport_port *edge_port,
2345                                                 __u8 regNum, __u8 regValue)
2346 {
2347         struct edgeport_serial *edge_serial =
2348                                 usb_get_serial_data(edge_port->port->serial);
2349         struct device *dev = &edge_port->port->dev;
2350         unsigned char *cmdBuffer;
2351         unsigned char *currCmd;
2352         unsigned long cmdLen = 0;
2353         int status;
2354
2355         dev_dbg(dev, "%s - write to %s register 0x%02x\n",
2356                 (regNum == MCR) ? "MCR" : "LCR", __func__, regValue);
2357
2358         if (edge_serial->is_epic &&
2359             !edge_serial->epic_descriptor.Supports.IOSPWriteMCR &&
2360             regNum == MCR) {
2361                 dev_dbg(dev, "SendCmdWriteUartReg - Not writing to MCR Register\n");
2362                 return 0;
2363         }
2364
2365         if (edge_serial->is_epic &&
2366             !edge_serial->epic_descriptor.Supports.IOSPWriteLCR &&
2367             regNum == LCR) {
2368                 dev_dbg(dev, "SendCmdWriteUartReg - Not writing to LCR Register\n");
2369                 return 0;
2370         }
2371
2372         /* Alloc memory for the string of commands. */
2373         cmdBuffer = kmalloc(0x10, GFP_ATOMIC);
2374         if (cmdBuffer == NULL)
2375                 return -ENOMEM;
2376
2377         currCmd = cmdBuffer;
2378
2379         /* Build a cmd in the buffer to write the given register */
2380         MAKE_CMD_WRITE_REG(&currCmd, &cmdLen, edge_port->port->port_number,
2381                            regNum, regValue);
2382
2383         status = write_cmd_usb(edge_port, cmdBuffer, cmdLen);
2384         if (status) {
2385                 /* something bad happened, let's free up the memory */
2386                 kfree(cmdBuffer);
2387         }
2388
2389         return status;
2390 }
2391
2392
2393 /*****************************************************************************
2394  * change_port_settings
2395  *      This routine is called to set the UART on the device to match the
2396  *      specified new settings.
2397  *****************************************************************************/
2398
2399 static void change_port_settings(struct tty_struct *tty,
2400         struct edgeport_port *edge_port, struct ktermios *old_termios)
2401 {
2402         struct device *dev = &edge_port->port->dev;
2403         struct edgeport_serial *edge_serial =
2404                         usb_get_serial_data(edge_port->port->serial);
2405         int baud;
2406         unsigned cflag;
2407         __u8 mask = 0xff;
2408         __u8 lData;
2409         __u8 lParity;
2410         __u8 lStop;
2411         __u8 rxFlow;
2412         __u8 txFlow;
2413         int status;
2414
2415         if (!edge_port->open &&
2416             !edge_port->openPending) {
2417                 dev_dbg(dev, "%s - port not opened\n", __func__);
2418                 return;
2419         }
2420
2421         cflag = tty->termios.c_cflag;
2422
2423         switch (cflag & CSIZE) {
2424         case CS5:
2425                 lData = LCR_BITS_5; mask = 0x1f;
2426                 dev_dbg(dev, "%s - data bits = 5\n", __func__);
2427                 break;
2428         case CS6:
2429                 lData = LCR_BITS_6; mask = 0x3f;
2430                 dev_dbg(dev, "%s - data bits = 6\n", __func__);
2431                 break;
2432         case CS7:
2433                 lData = LCR_BITS_7; mask = 0x7f;
2434                 dev_dbg(dev, "%s - data bits = 7\n", __func__);
2435                 break;
2436         default:
2437         case CS8:
2438                 lData = LCR_BITS_8;
2439                 dev_dbg(dev, "%s - data bits = 8\n", __func__);
2440                 break;
2441         }
2442
2443         lParity = LCR_PAR_NONE;
2444         if (cflag & PARENB) {
2445                 if (cflag & CMSPAR) {
2446                         if (cflag & PARODD) {
2447                                 lParity = LCR_PAR_MARK;
2448                                 dev_dbg(dev, "%s - parity = mark\n", __func__);
2449                         } else {
2450                                 lParity = LCR_PAR_SPACE;
2451                                 dev_dbg(dev, "%s - parity = space\n", __func__);
2452                         }
2453                 } else if (cflag & PARODD) {
2454                         lParity = LCR_PAR_ODD;
2455                         dev_dbg(dev, "%s - parity = odd\n", __func__);
2456                 } else {
2457                         lParity = LCR_PAR_EVEN;
2458                         dev_dbg(dev, "%s - parity = even\n", __func__);
2459                 }
2460         } else {
2461                 dev_dbg(dev, "%s - parity = none\n", __func__);
2462         }
2463
2464         if (cflag & CSTOPB) {
2465                 lStop = LCR_STOP_2;
2466                 dev_dbg(dev, "%s - stop bits = 2\n", __func__);
2467         } else {
2468                 lStop = LCR_STOP_1;
2469                 dev_dbg(dev, "%s - stop bits = 1\n", __func__);
2470         }
2471
2472         /* figure out the flow control settings */
2473         rxFlow = txFlow = 0x00;
2474         if (cflag & CRTSCTS) {
2475                 rxFlow |= IOSP_RX_FLOW_RTS;
2476                 txFlow |= IOSP_TX_FLOW_CTS;
2477                 dev_dbg(dev, "%s - RTS/CTS is enabled\n", __func__);
2478         } else {
2479                 dev_dbg(dev, "%s - RTS/CTS is disabled\n", __func__);
2480         }
2481
2482         /* if we are implementing XON/XOFF, set the start and stop character
2483            in the device */
2484         if (I_IXOFF(tty) || I_IXON(tty)) {
2485                 unsigned char stop_char  = STOP_CHAR(tty);
2486                 unsigned char start_char = START_CHAR(tty);
2487
2488                 if ((!edge_serial->is_epic) ||
2489                     ((edge_serial->is_epic) &&
2490                      (edge_serial->epic_descriptor.Supports.IOSPSetXChar))) {
2491                         send_iosp_ext_cmd(edge_port,
2492                                         IOSP_CMD_SET_XON_CHAR, start_char);
2493                         send_iosp_ext_cmd(edge_port,
2494                                         IOSP_CMD_SET_XOFF_CHAR, stop_char);
2495                 }
2496
2497                 /* if we are implementing INBOUND XON/XOFF */
2498                 if (I_IXOFF(tty)) {
2499                         rxFlow |= IOSP_RX_FLOW_XON_XOFF;
2500                         dev_dbg(dev, "%s - INBOUND XON/XOFF is enabled, XON = %2x, XOFF = %2x\n",
2501                                 __func__, start_char, stop_char);
2502                 } else {
2503                         dev_dbg(dev, "%s - INBOUND XON/XOFF is disabled\n", __func__);
2504                 }
2505
2506                 /* if we are implementing OUTBOUND XON/XOFF */
2507                 if (I_IXON(tty)) {
2508                         txFlow |= IOSP_TX_FLOW_XON_XOFF;
2509                         dev_dbg(dev, "%s - OUTBOUND XON/XOFF is enabled, XON = %2x, XOFF = %2x\n",
2510                                 __func__, start_char, stop_char);
2511                 } else {
2512                         dev_dbg(dev, "%s - OUTBOUND XON/XOFF is disabled\n", __func__);
2513                 }
2514         }
2515
2516         /* Set flow control to the configured value */
2517         if ((!edge_serial->is_epic) ||
2518             ((edge_serial->is_epic) &&
2519              (edge_serial->epic_descriptor.Supports.IOSPSetRxFlow)))
2520                 send_iosp_ext_cmd(edge_port, IOSP_CMD_SET_RX_FLOW, rxFlow);
2521         if ((!edge_serial->is_epic) ||
2522             ((edge_serial->is_epic) &&
2523              (edge_serial->epic_descriptor.Supports.IOSPSetTxFlow)))
2524                 send_iosp_ext_cmd(edge_port, IOSP_CMD_SET_TX_FLOW, txFlow);
2525
2526
2527         edge_port->shadowLCR &= ~(LCR_BITS_MASK | LCR_STOP_MASK | LCR_PAR_MASK);
2528         edge_port->shadowLCR |= (lData | lParity | lStop);
2529
2530         edge_port->validDataMask = mask;
2531
2532         /* Send the updated LCR value to the EdgePort */
2533         status = send_cmd_write_uart_register(edge_port, LCR,
2534                                                         edge_port->shadowLCR);
2535         if (status != 0)
2536                 return;
2537
2538         /* set up the MCR register and send it to the EdgePort */
2539         edge_port->shadowMCR = MCR_MASTER_IE;
2540         if (cflag & CBAUD)
2541                 edge_port->shadowMCR |= (MCR_DTR | MCR_RTS);
2542
2543         status = send_cmd_write_uart_register(edge_port, MCR,
2544                                                 edge_port->shadowMCR);
2545         if (status != 0)
2546                 return;
2547
2548         /* Determine divisor based on baud rate */
2549         baud = tty_get_baud_rate(tty);
2550         if (!baud) {
2551                 /* pick a default, any default... */
2552                 baud = 9600;
2553         }
2554
2555         dev_dbg(dev, "%s - baud rate = %d\n", __func__, baud);
2556         status = send_cmd_write_baud_rate(edge_port, baud);
2557         if (status == -1) {
2558                 /* Speed change was not possible - put back the old speed */
2559                 baud = tty_termios_baud_rate(old_termios);
2560                 tty_encode_baud_rate(tty, baud, baud);
2561         }
2562 }
2563
2564
2565 /****************************************************************************
2566  * unicode_to_ascii
2567  *      Turns a string from Unicode into ASCII.
2568  *      Doesn't do a good job with any characters that are outside the normal
2569  *      ASCII range, but it's only for debugging...
2570  *      NOTE: expects the unicode in LE format
2571  ****************************************************************************/
2572 static void unicode_to_ascii(char *string, int buflen,
2573                                         __le16 *unicode, int unicode_size)
2574 {
2575         int i;
2576
2577         if (buflen <= 0)        /* never happens, but... */
2578                 return;
2579         --buflen;               /* space for nul */
2580
2581         for (i = 0; i < unicode_size; i++) {
2582                 if (i >= buflen)
2583                         break;
2584                 string[i] = (char)(le16_to_cpu(unicode[i]));
2585         }
2586         string[i] = 0x00;
2587 }
2588
2589
2590 /****************************************************************************
2591  * get_manufacturing_desc
2592  *      reads in the manufacturing descriptor and stores it into the serial
2593  *      structure.
2594  ****************************************************************************/
2595 static void get_manufacturing_desc(struct edgeport_serial *edge_serial)
2596 {
2597         struct device *dev = &edge_serial->serial->dev->dev;
2598         int response;
2599
2600         dev_dbg(dev, "getting manufacturer descriptor\n");
2601
2602         response = rom_read(edge_serial->serial,
2603                                 (EDGE_MANUF_DESC_ADDR & 0xffff0000) >> 16,
2604                                 (__u16)(EDGE_MANUF_DESC_ADDR & 0x0000ffff),
2605                                 EDGE_MANUF_DESC_LEN,
2606                                 (__u8 *)(&edge_serial->manuf_descriptor));
2607
2608         if (response < 1)
2609                 dev_err(dev, "error in getting manufacturer descriptor\n");
2610         else {
2611                 char string[30];
2612                 dev_dbg(dev, "**Manufacturer Descriptor\n");
2613                 dev_dbg(dev, "  RomSize:        %dK\n",
2614                         edge_serial->manuf_descriptor.RomSize);
2615                 dev_dbg(dev, "  RamSize:        %dK\n",
2616                         edge_serial->manuf_descriptor.RamSize);
2617                 dev_dbg(dev, "  CpuRev:         %d\n",
2618                         edge_serial->manuf_descriptor.CpuRev);
2619                 dev_dbg(dev, "  BoardRev:       %d\n",
2620                         edge_serial->manuf_descriptor.BoardRev);
2621                 dev_dbg(dev, "  NumPorts:       %d\n",
2622                         edge_serial->manuf_descriptor.NumPorts);
2623                 dev_dbg(dev, "  DescDate:       %d/%d/%d\n",
2624                         edge_serial->manuf_descriptor.DescDate[0],
2625                         edge_serial->manuf_descriptor.DescDate[1],
2626                         edge_serial->manuf_descriptor.DescDate[2]+1900);
2627                 unicode_to_ascii(string, sizeof(string),
2628                         edge_serial->manuf_descriptor.SerialNumber,
2629                         edge_serial->manuf_descriptor.SerNumLength/2);
2630                 dev_dbg(dev, "  SerialNumber: %s\n", string);
2631                 unicode_to_ascii(string, sizeof(string),
2632                         edge_serial->manuf_descriptor.AssemblyNumber,
2633                         edge_serial->manuf_descriptor.AssemblyNumLength/2);
2634                 dev_dbg(dev, "  AssemblyNumber: %s\n", string);
2635                 unicode_to_ascii(string, sizeof(string),
2636                     edge_serial->manuf_descriptor.OemAssyNumber,
2637                     edge_serial->manuf_descriptor.OemAssyNumLength/2);
2638                 dev_dbg(dev, "  OemAssyNumber:  %s\n", string);
2639                 dev_dbg(dev, "  UartType:       %d\n",
2640                         edge_serial->manuf_descriptor.UartType);
2641                 dev_dbg(dev, "  IonPid:         %d\n",
2642                         edge_serial->manuf_descriptor.IonPid);
2643                 dev_dbg(dev, "  IonConfig:      %d\n",
2644                         edge_serial->manuf_descriptor.IonConfig);
2645         }
2646 }
2647
2648
2649 /****************************************************************************
2650  * get_boot_desc
2651  *      reads in the bootloader descriptor and stores it into the serial
2652  *      structure.
2653  ****************************************************************************/
2654 static void get_boot_desc(struct edgeport_serial *edge_serial)
2655 {
2656         struct device *dev = &edge_serial->serial->dev->dev;
2657         int response;
2658
2659         dev_dbg(dev, "getting boot descriptor\n");
2660
2661         response = rom_read(edge_serial->serial,
2662                                 (EDGE_BOOT_DESC_ADDR & 0xffff0000) >> 16,
2663                                 (__u16)(EDGE_BOOT_DESC_ADDR & 0x0000ffff),
2664                                 EDGE_BOOT_DESC_LEN,
2665                                 (__u8 *)(&edge_serial->boot_descriptor));
2666
2667         if (response < 1)
2668                 dev_err(dev, "error in getting boot descriptor\n");
2669         else {
2670                 dev_dbg(dev, "**Boot Descriptor:\n");
2671                 dev_dbg(dev, "  BootCodeLength: %d\n",
2672                         le16_to_cpu(edge_serial->boot_descriptor.BootCodeLength));
2673                 dev_dbg(dev, "  MajorVersion:   %d\n",
2674                         edge_serial->boot_descriptor.MajorVersion);
2675                 dev_dbg(dev, "  MinorVersion:   %d\n",
2676                         edge_serial->boot_descriptor.MinorVersion);
2677                 dev_dbg(dev, "  BuildNumber:    %d\n",
2678                         le16_to_cpu(edge_serial->boot_descriptor.BuildNumber));
2679                 dev_dbg(dev, "  Capabilities:   0x%x\n",
2680                       le16_to_cpu(edge_serial->boot_descriptor.Capabilities));
2681                 dev_dbg(dev, "  UConfig0:       %d\n",
2682                         edge_serial->boot_descriptor.UConfig0);
2683                 dev_dbg(dev, "  UConfig1:       %d\n",
2684                         edge_serial->boot_descriptor.UConfig1);
2685         }
2686 }
2687
2688
2689 /****************************************************************************
2690  * load_application_firmware
2691  *      This is called to load the application firmware to the device
2692  ****************************************************************************/
2693 static void load_application_firmware(struct edgeport_serial *edge_serial)
2694 {
2695         struct device *dev = &edge_serial->serial->dev->dev;
2696         const struct ihex_binrec *rec;
2697         const struct firmware *fw;
2698         const char *fw_name;
2699         const char *fw_info;
2700         int response;
2701         __u32 Operaddr;
2702         __u16 build;
2703
2704         switch (edge_serial->product_info.iDownloadFile) {
2705                 case EDGE_DOWNLOAD_FILE_I930:
2706                         fw_info = "downloading firmware version (930)";
2707                         fw_name = "edgeport/down.fw";
2708                         break;
2709
2710                 case EDGE_DOWNLOAD_FILE_80251:
2711                         fw_info = "downloading firmware version (80251)";
2712                         fw_name = "edgeport/down2.fw";
2713                         break;
2714
2715                 case EDGE_DOWNLOAD_FILE_NONE:
2716                         dev_dbg(dev, "No download file specified, skipping download\n");
2717                         return;
2718
2719                 default:
2720                         return;
2721         }
2722
2723         response = request_ihex_firmware(&fw, fw_name,
2724                                     &edge_serial->serial->dev->dev);
2725         if (response) {
2726                 dev_err(dev, "Failed to load image \"%s\" err %d\n",
2727                        fw_name, response);
2728                 return;
2729         }
2730
2731         rec = (const struct ihex_binrec *)fw->data;
2732         build = (rec->data[2] << 8) | rec->data[3];
2733
2734         dev_dbg(dev, "%s %d.%d.%d\n", fw_info, rec->data[0], rec->data[1], build);
2735
2736         edge_serial->product_info.FirmwareMajorVersion = rec->data[0];
2737         edge_serial->product_info.FirmwareMinorVersion = rec->data[1];
2738         edge_serial->product_info.FirmwareBuildNumber = cpu_to_le16(build);
2739
2740         for (rec = ihex_next_binrec(rec); rec;
2741              rec = ihex_next_binrec(rec)) {
2742                 Operaddr = be32_to_cpu(rec->addr);
2743                 response = sram_write(edge_serial->serial,
2744                                      Operaddr >> 16,
2745                                      Operaddr & 0xFFFF,
2746                                      be16_to_cpu(rec->len),
2747                                      &rec->data[0]);
2748                 if (response < 0) {
2749                         dev_err(&edge_serial->serial->dev->dev,
2750                                 "sram_write failed (%x, %x, %d)\n",
2751                                 Operaddr >> 16, Operaddr & 0xFFFF,
2752                                 be16_to_cpu(rec->len));
2753                         break;
2754                 }
2755         }
2756
2757         dev_dbg(dev, "sending exec_dl_code\n");
2758         response = usb_control_msg (edge_serial->serial->dev,
2759                                     usb_sndctrlpipe(edge_serial->serial->dev, 0),
2760                                     USB_REQUEST_ION_EXEC_DL_CODE,
2761                                     0x40, 0x4000, 0x0001, NULL, 0, 3000);
2762
2763         release_firmware(fw);
2764 }
2765
2766
2767 /****************************************************************************
2768  * edge_startup
2769  ****************************************************************************/
2770 static int edge_startup(struct usb_serial *serial)
2771 {
2772         struct edgeport_serial *edge_serial;
2773         struct usb_device *dev;
2774         struct device *ddev = &serial->dev->dev;
2775         int i;
2776         int response;
2777         bool interrupt_in_found;
2778         bool bulk_in_found;
2779         bool bulk_out_found;
2780         static __u32 descriptor[3] = {  EDGE_COMPATIBILITY_MASK0,
2781                                         EDGE_COMPATIBILITY_MASK1,
2782                                         EDGE_COMPATIBILITY_MASK2 };
2783
2784         dev = serial->dev;
2785
2786         /* create our private serial structure */
2787         edge_serial = kzalloc(sizeof(struct edgeport_serial), GFP_KERNEL);
2788         if (edge_serial == NULL) {
2789                 dev_err(&serial->dev->dev, "%s - Out of memory\n", __func__);
2790                 return -ENOMEM;
2791         }
2792         spin_lock_init(&edge_serial->es_lock);
2793         edge_serial->serial = serial;
2794         usb_set_serial_data(serial, edge_serial);
2795
2796         /* get the name for the device from the device */
2797         i = usb_string(dev, dev->descriptor.iManufacturer,
2798             &edge_serial->name[0], MAX_NAME_LEN+1);
2799         if (i < 0)
2800                 i = 0;
2801         edge_serial->name[i++] = ' ';
2802         usb_string(dev, dev->descriptor.iProduct,
2803             &edge_serial->name[i], MAX_NAME_LEN+2 - i);
2804
2805         dev_info(&serial->dev->dev, "%s detected\n", edge_serial->name);
2806
2807         /* Read the epic descriptor */
2808         if (get_epic_descriptor(edge_serial) <= 0) {
2809                 /* memcpy descriptor to Supports structures */
2810                 memcpy(&edge_serial->epic_descriptor.Supports, descriptor,
2811                        sizeof(struct edge_compatibility_bits));
2812
2813                 /* get the manufacturing descriptor for this device */
2814                 get_manufacturing_desc(edge_serial);
2815
2816                 /* get the boot descriptor */
2817                 get_boot_desc(edge_serial);
2818
2819                 get_product_info(edge_serial);
2820         }
2821
2822         /* set the number of ports from the manufacturing description */
2823         /* serial->num_ports = serial->product_info.NumPorts; */
2824         if ((!edge_serial->is_epic) &&
2825             (edge_serial->product_info.NumPorts != serial->num_ports)) {
2826                 dev_warn(ddev,
2827                         "Device Reported %d serial ports vs. core thinking we have %d ports, email greg@kroah.com this information.\n",
2828                          edge_serial->product_info.NumPorts,
2829                          serial->num_ports);
2830         }
2831
2832         dev_dbg(ddev, "%s - time 1 %ld\n", __func__, jiffies);
2833
2834         /* If not an EPiC device */
2835         if (!edge_serial->is_epic) {
2836                 /* now load the application firmware into this device */
2837                 load_application_firmware(edge_serial);
2838
2839                 dev_dbg(ddev, "%s - time 2 %ld\n", __func__, jiffies);
2840
2841                 /* Check current Edgeport EEPROM and update if necessary */
2842                 update_edgeport_E2PROM(edge_serial);
2843
2844                 dev_dbg(ddev, "%s - time 3 %ld\n", __func__, jiffies);
2845
2846                 /* set the configuration to use #1 */
2847 /*              dev_dbg(ddev, "set_configuration 1\n"); */
2848 /*              usb_set_configuration (dev, 1); */
2849         }
2850         dev_dbg(ddev, "  FirmwareMajorVersion  %d.%d.%d\n",
2851             edge_serial->product_info.FirmwareMajorVersion,
2852             edge_serial->product_info.FirmwareMinorVersion,
2853             le16_to_cpu(edge_serial->product_info.FirmwareBuildNumber));
2854
2855         /* we set up the pointers to the endpoints in the edge_open function,
2856          * as the structures aren't created yet. */
2857
2858         response = 0;
2859
2860         if (edge_serial->is_epic) {
2861                 /* EPIC thing, set up our interrupt polling now and our read
2862                  * urb, so that the device knows it really is connected. */
2863                 interrupt_in_found = bulk_in_found = bulk_out_found = false;
2864                 for (i = 0; i < serial->interface->altsetting[0]
2865                                                 .desc.bNumEndpoints; ++i) {
2866                         struct usb_endpoint_descriptor *endpoint;
2867                         int buffer_size;
2868
2869                         endpoint = &serial->interface->altsetting[0].
2870                                                         endpoint[i].desc;
2871                         buffer_size = usb_endpoint_maxp(endpoint);
2872                         if (!interrupt_in_found &&
2873                             (usb_endpoint_is_int_in(endpoint))) {
2874                                 /* we found a interrupt in endpoint */
2875                                 dev_dbg(ddev, "found interrupt in\n");
2876
2877                                 /* not set up yet, so do it now */
2878                                 edge_serial->interrupt_read_urb =
2879                                                 usb_alloc_urb(0, GFP_KERNEL);
2880                                 if (!edge_serial->interrupt_read_urb) {
2881                                         dev_err(ddev, "out of memory\n");
2882                                         return -ENOMEM;
2883                                 }
2884                                 edge_serial->interrupt_in_buffer =
2885                                         kmalloc(buffer_size, GFP_KERNEL);
2886                                 if (!edge_serial->interrupt_in_buffer) {
2887                                         dev_err(ddev, "out of memory\n");
2888                                         usb_free_urb(edge_serial->interrupt_read_urb);
2889                                         return -ENOMEM;
2890                                 }
2891                                 edge_serial->interrupt_in_endpoint =
2892                                                 endpoint->bEndpointAddress;
2893
2894                                 /* set up our interrupt urb */
2895                                 usb_fill_int_urb(
2896                                         edge_serial->interrupt_read_urb,
2897                                         dev,
2898                                         usb_rcvintpipe(dev,
2899                                                 endpoint->bEndpointAddress),
2900                                         edge_serial->interrupt_in_buffer,
2901                                         buffer_size,
2902                                         edge_interrupt_callback,
2903                                         edge_serial,
2904                                         endpoint->bInterval);
2905
2906                                 interrupt_in_found = true;
2907                         }
2908
2909                         if (!bulk_in_found &&
2910                                 (usb_endpoint_is_bulk_in(endpoint))) {
2911                                 /* we found a bulk in endpoint */
2912                                 dev_dbg(ddev, "found bulk in\n");
2913
2914                                 /* not set up yet, so do it now */
2915                                 edge_serial->read_urb =
2916                                                 usb_alloc_urb(0, GFP_KERNEL);
2917                                 if (!edge_serial->read_urb) {
2918                                         dev_err(ddev, "out of memory\n");
2919                                         return -ENOMEM;
2920                                 }
2921                                 edge_serial->bulk_in_buffer =
2922                                         kmalloc(buffer_size, GFP_KERNEL);
2923                                 if (!edge_serial->bulk_in_buffer) {
2924                                         dev_err(&dev->dev, "out of memory\n");
2925                                         usb_free_urb(edge_serial->read_urb);
2926                                         return -ENOMEM;
2927                                 }
2928                                 edge_serial->bulk_in_endpoint =
2929                                                 endpoint->bEndpointAddress;
2930
2931                                 /* set up our bulk in urb */
2932                                 usb_fill_bulk_urb(edge_serial->read_urb, dev,
2933                                         usb_rcvbulkpipe(dev,
2934                                                 endpoint->bEndpointAddress),
2935                                         edge_serial->bulk_in_buffer,
2936                                         usb_endpoint_maxp(endpoint),
2937                                         edge_bulk_in_callback,
2938                                         edge_serial);
2939                                 bulk_in_found = true;
2940                         }
2941
2942                         if (!bulk_out_found &&
2943                             (usb_endpoint_is_bulk_out(endpoint))) {
2944                                 /* we found a bulk out endpoint */
2945                                 dev_dbg(ddev, "found bulk out\n");
2946                                 edge_serial->bulk_out_endpoint =
2947                                                 endpoint->bEndpointAddress;
2948                                 bulk_out_found = true;
2949                         }
2950                 }
2951
2952                 if (!interrupt_in_found || !bulk_in_found || !bulk_out_found) {
2953                         dev_err(ddev, "Error - the proper endpoints were not found!\n");
2954                         return -ENODEV;
2955                 }
2956
2957                 /* start interrupt read for this edgeport this interrupt will
2958                  * continue as long as the edgeport is connected */
2959                 response = usb_submit_urb(edge_serial->interrupt_read_urb,
2960                                                                 GFP_KERNEL);
2961                 if (response)
2962                         dev_err(ddev, "%s - Error %d submitting control urb\n",
2963                                 __func__, response);
2964         }
2965         return response;
2966 }
2967
2968
2969 /****************************************************************************
2970  * edge_disconnect
2971  *      This function is called whenever the device is removed from the usb bus.
2972  ****************************************************************************/
2973 static void edge_disconnect(struct usb_serial *serial)
2974 {
2975         struct edgeport_serial *edge_serial = usb_get_serial_data(serial);
2976
2977         /* stop reads and writes on all ports */
2978         /* free up our endpoint stuff */
2979         if (edge_serial->is_epic) {
2980                 usb_kill_urb(edge_serial->interrupt_read_urb);
2981                 usb_free_urb(edge_serial->interrupt_read_urb);
2982                 kfree(edge_serial->interrupt_in_buffer);
2983
2984                 usb_kill_urb(edge_serial->read_urb);
2985                 usb_free_urb(edge_serial->read_urb);
2986                 kfree(edge_serial->bulk_in_buffer);
2987         }
2988 }
2989
2990
2991 /****************************************************************************
2992  * edge_release
2993  *      This function is called when the device structure is deallocated.
2994  ****************************************************************************/
2995 static void edge_release(struct usb_serial *serial)
2996 {
2997         struct edgeport_serial *edge_serial = usb_get_serial_data(serial);
2998
2999         kfree(edge_serial);
3000 }
3001
3002 static int edge_port_probe(struct usb_serial_port *port)
3003 {
3004         struct edgeport_port *edge_port;
3005
3006         edge_port = kzalloc(sizeof(*edge_port), GFP_KERNEL);
3007         if (!edge_port)
3008                 return -ENOMEM;
3009
3010         spin_lock_init(&edge_port->ep_lock);
3011         edge_port->port = port;
3012
3013         usb_set_serial_port_data(port, edge_port);
3014
3015         return 0;
3016 }
3017
3018 static int edge_port_remove(struct usb_serial_port *port)
3019 {
3020         struct edgeport_port *edge_port;
3021
3022         edge_port = usb_get_serial_port_data(port);
3023         kfree(edge_port);
3024
3025         return 0;
3026 }
3027
3028 module_usb_serial_driver(serial_drivers, id_table_combined);
3029
3030 MODULE_AUTHOR(DRIVER_AUTHOR);
3031 MODULE_DESCRIPTION(DRIVER_DESC);
3032 MODULE_LICENSE("GPL");
3033 MODULE_FIRMWARE("edgeport/boot.fw");
3034 MODULE_FIRMWARE("edgeport/boot2.fw");
3035 MODULE_FIRMWARE("edgeport/down.fw");
3036 MODULE_FIRMWARE("edgeport/down2.fw");