drivers/usb/serial/io_edgeport.c

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