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