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/slab.h>
  36 #include <linux/tty.h>
  37 #include <linux/tty_driver.h>
  38 #include <linux/tty_flip.h>
  39 #include <linux/module.h>
  40 #include <linux/spinlock.h>
  41 #include <linux/serial.h>
  42 #include <linux/ioctl.h>
  43 #include <linux/wait.h>
  44 #include <linux/firmware.h>
  45 #include <linux/ihex.h>
  46 #include <linux/uaccess.h>
  47 #include <linux/usb.h>
  48 #include <linux/usb/serial.h>
  49 #include "io_edgeport.h"
  50 #include "io_ionsp.h"           /* info for the iosp messages */
  51 #include "io_16654.h"           /* 16654 UART defines */
  52
  53 #define DRIVER_AUTHOR "Greg Kroah-Hartman <greg@kroah.com> and David Iacovelli"
  54 #define DRIVER_DESC "Edgeport USB Serial Driver"
  55
  56 #define MAX_NAME_LEN            64
  57
  58 #define OPEN_TIMEOUT            (5*HZ)          /* 5 seconds */
  59
  60 /* receive port state */
  61 enum RXSTATE {
  62         EXPECT_HDR1 = 0,    /* Expect header byte 1 */
  63         EXPECT_HDR2 = 1,    /* Expect header byte 2 */
  64         EXPECT_DATA = 2,    /* Expect 'RxBytesRemaining' data */
  65         EXPECT_HDR3 = 3,    /* Expect header byte 3 (for status hdrs only) */
  66 };
  67
  68
  69 /* Transmit Fifo
  70  * This Transmit queue is an extension of the edgeport Rx buffer.
  71  * The maximum amount of data buffered in both the edgeport
  72  * Rx buffer (maxTxCredits) and this buffer will never exceed maxTxCredits.
  73  */
  74 struct TxFifo {
  75         unsigned int    head;   /* index to head pointer (write) */
  76         unsigned int    tail;   /* index to tail pointer (read)  */
  77         unsigned int    count;  /* Bytes in queue */
  78         unsigned int    size;   /* Max size of queue (equal to Max number of TxCredits) */
  79         unsigned char   *fifo;  /* allocated Buffer */
  80 };
  81
  82 /* This structure holds all of the local port information */
  83 struct edgeport_port {
  84         __u16                   txCredits;              /* our current credits for this port */
  85         __u16                   maxTxCredits;           /* the max size of the port */
  86
  87         struct TxFifo           txfifo;                 /* transmit fifo -- size will be maxTxCredits */
  88         struct urb              *write_urb;             /* write URB for this port */
  89         bool                    write_in_progress;      /* 'true' while a write URB is outstanding */
  90         spinlock_t              ep_lock;
  91
  92         __u8                    shadowLCR;              /* last LCR value received */
  93         __u8                    shadowMCR;              /* last MCR value received */
  94         __u8                    shadowMSR;              /* last MSR value received */
  95         __u8                    shadowLSR;              /* last LSR value received */
  96         __u8                    shadowXonChar;          /* last value set as XON char in Edgeport */
  97         __u8                    shadowXoffChar;         /* last value set as XOFF char in Edgeport */
  98         __u8                    validDataMask;
  99         __u32                   baudRate;
 100
 101         bool                    open;
 102         bool                    openPending;
 103         bool                    commandPending;
 104         bool                    closePending;
 105         bool                    chaseResponsePending;
 106
 107         wait_queue_head_t       wait_chase;             /* for handling sleeping while waiting for chase to finish */
 108         wait_queue_head_t       wait_open;              /* for handling sleeping while waiting for open to finish */
 109         wait_queue_head_t       wait_command;           /* for handling sleeping while waiting for command to finish */
 110
 111         struct usb_serial_port  *port;                  /* loop back to the owner of this object */
 112 };
 113
 114
 115 /* This structure holds all of the individual device information */
 116 struct edgeport_serial {
 117         char                    name[MAX_NAME_LEN+2];           /* string name of this device */
 118
 119         struct edge_manuf_descriptor    manuf_descriptor;       /* the manufacturer descriptor */
 120         struct edge_boot_descriptor     boot_descriptor;        /* the boot firmware descriptor */
 121         struct edgeport_product_info    product_info;           /* Product Info */
 122         struct edge_compatibility_descriptor epic_descriptor;   /* Edgeport compatible descriptor */
 123         int                     is_epic;                        /* flag if EPiC device or not */
 124
 125         __u8                    interrupt_in_endpoint;          /* the interrupt endpoint handle */
 126         unsigned char           *interrupt_in_buffer;           /* the buffer we use for the interrupt endpoint */
 127         struct urb              *interrupt_read_urb;            /* our interrupt urb */
 128
 129         __u8                    bulk_in_endpoint;               /* the bulk in endpoint handle */
 130         unsigned char           *bulk_in_buffer;                /* the buffer we use for the bulk in endpoint */
 131         struct urb              *read_urb;                      /* our bulk read urb */
 132         bool                    read_in_progress;
 133         spinlock_t              es_lock;
 134
 135         __u8                    bulk_out_endpoint;              /* the bulk out endpoint handle */
 136
 137         __s16                   rxBytesAvail;                   /* the number of bytes that we need to read from this device */
 138
 139         enum RXSTATE            rxState;                        /* the current state of the bulk receive processor */
 140         __u8                    rxHeader1;                      /* receive header byte 1 */
 141         __u8                    rxHeader2;                      /* receive header byte 2 */
 142         __u8                    rxHeader3;                      /* receive header byte 3 */
 143         __u8                    rxPort;                         /* the port that we are currently receiving data for */
 144         __u8                    rxStatusCode;                   /* the receive status code */
 145         __u8                    rxStatusParam;                  /* the receive status paramater */
 146         __s16                   rxBytesRemaining;               /* the number of port bytes left to read */
 147         struct usb_serial       *serial;                        /* loop back to the owner of this object */
 148 };
 149
 150 /* baud rate information */
 151 struct divisor_table_entry {
 152         __u32   BaudRate;
 153         __u16  Divisor;
 154 };
 155
 156 /*
 157  * Define table of divisors for Rev A EdgePort/4 hardware
 158  * These assume a 3.6864MHz crystal, the standard /16, and
 159  * MCR.7 = 0.
 160  */
 161
 162 static const struct divisor_table_entry divisor_table[] = {
 163         {   50,         4608},
 164         {   75,         3072},
 165         {   110,        2095},  /* 2094.545455 => 230450   => .0217 % over */
 166         {   134,        1713},  /* 1713.011152 => 230398.5 => .00065% under */
 167         {   150,        1536},
 168         {   300,        768},
 169         {   600,        384},
 170         {   1200,       192},
 171         {   1800,       128},
 172         {   2400,       96},
 173         {   4800,       48},
 174         {   7200,       32},
 175         {   9600,       24},
 176         {   14400,      16},
 177         {   19200,      12},
 178         {   38400,      6},
 179         {   57600,      4},
 180         {   115200,     2},
 181         {   230400,     1},
 182 };
 183
 184 /* Number of outstanding Command Write Urbs */
 185 static atomic_t CmdUrbs = ATOMIC_INIT(0);
 186
 187
 188 /* local function prototypes */
 189
 190 /* function prototypes for all URB callbacks */
 191 static void edge_interrupt_callback(struct urb *urb);
 192 static void edge_bulk_in_callback(struct urb *urb);
 193 static void edge_bulk_out_data_callback(struct urb *urb);
 194 static void edge_bulk_out_cmd_callback(struct urb *urb);
 195
 196 /* function prototypes for the usbserial callbacks */
 197 static int edge_open(struct tty_struct *tty, struct usb_serial_port *port);
 198 static void edge_close(struct usb_serial_port *port);
 199 static int edge_write(struct tty_struct *tty, struct usb_serial_port *port,
 200                                         const unsigned char *buf, int count);
 201 static int edge_write_room(struct tty_struct *tty);
 202 static int edge_chars_in_buffer(struct tty_struct *tty);
 203 static void edge_throttle(struct tty_struct *tty);
 204 static void edge_unthrottle(struct tty_struct *tty);
 205 static void edge_set_termios(struct tty_struct *tty,
 206                                         struct usb_serial_port *port,
 207                                         struct ktermios *old_termios);
 208 static int  edge_ioctl(struct tty_struct *tty,
 209                                         unsigned int cmd, unsigned long arg);
 210 static void edge_break(struct tty_struct *tty, int break_state);
 211 static int  edge_tiocmget(struct tty_struct *tty);
 212 static int  edge_tiocmset(struct tty_struct *tty,
 213                                         unsigned int set, unsigned int clear);
 214 static int  edge_startup(struct usb_serial *serial);
 215 static void edge_disconnect(struct usb_serial *serial);
 216 static void edge_release(struct usb_serial *serial);
 217 static int edge_port_probe(struct usb_serial_port *port);
 218 static int edge_port_remove(struct usb_serial_port *port);
 219
 220 #include "io_tables.h"  /* all of the devices that this driver supports */
 221
 222 /* function prototypes for all of our local functions */
 223
 224 static void  process_rcvd_data(struct edgeport_serial *edge_serial,
 225                                 unsigned char *buffer, __u16 bufferLength);
 226 static void process_rcvd_status(struct edgeport_serial *edge_serial,
 227                                 __u8 byte2, __u8 byte3);
 228 static void edge_tty_recv(struct usb_serial_port *port, unsigned char *data,
 229                 int length);
 230 static void handle_new_msr(struct edgeport_port *edge_port, __u8 newMsr);
 231 static void handle_new_lsr(struct edgeport_port *edge_port, __u8 lsrData,
 232                                 __u8 lsr, __u8 data);
 233 static int  send_iosp_ext_cmd(struct edgeport_port *edge_port, __u8 command,
 234                                 __u8 param);
 235 static int  calc_baud_rate_divisor(struct device *dev, int baud_rate, int *divisor);
 236 static int  send_cmd_write_baud_rate(struct edgeport_port *edge_port,
 237                                 int baudRate);
 238 static void change_port_settings(struct tty_struct *tty,
 239                                 struct edgeport_port *edge_port,
 240                                 struct ktermios *old_termios);
 241 static int  send_cmd_write_uart_register(struct edgeport_port *edge_port,
 242                                 __u8 regNum, __u8 regValue);
 243 static int  write_cmd_usb(struct edgeport_port *edge_port,
 244                                 unsigned char *buffer, int writeLength);
 245 static void send_more_port_data(struct edgeport_serial *edge_serial,
 246                                 struct edgeport_port *edge_port);
 247
 248 static int sram_write(struct usb_serial *serial, __u16 extAddr, __u16 addr,
 249                                         __u16 length, const __u8 *data);
 250 static int rom_read(struct usb_serial *serial, __u16 extAddr, __u16 addr,
 251                                                 __u16 length, __u8 *data);
 252 static int rom_write(struct usb_serial *serial, __u16 extAddr, __u16 addr,
 253                                         __u16 length, const __u8 *data);
 254 static void get_manufacturing_desc(struct edgeport_serial *edge_serial);
 255 static void get_boot_desc(struct edgeport_serial *edge_serial);
 256 static void load_application_firmware(struct edgeport_serial *edge_serial);
 257
 258 static void unicode_to_ascii(char *string, int buflen,
 259                                 __le16 *unicode, int unicode_size);
 260
 261
 262 /* ************************************************************************ */
 263 /* ************************************************************************ */
 264 /* ************************************************************************ */
 265 /* ************************************************************************ */
 266
 267 /************************************************************************
 268  *                                                                      *
 269  * update_edgeport_E2PROM()     Compare current versions of             *
 270  *                              Boot ROM and Manufacture                *
 271  *                              Descriptors with versions               *
 272  *                              embedded in this driver                 *
 273  *                                                                      *
 274  ************************************************************************/
 275 static void update_edgeport_E2PROM(struct edgeport_serial *edge_serial)
 276 {
 277         struct device *dev = &edge_serial->serial->dev->dev;
 278         __u32 BootCurVer;
 279         __u32 BootNewVer;
 280         __u8 BootMajorVersion;
 281         __u8 BootMinorVersion;
 282         __u16 BootBuildNumber;
 283         __u32 Bootaddr;
 284         const struct ihex_binrec *rec;
 285         const struct firmware *fw;
 286         const char *fw_name;
 287         int response;
 288
 289         switch (edge_serial->product_info.iDownloadFile) {
 290         case EDGE_DOWNLOAD_FILE_I930:
 291                 fw_name = "edgeport/boot.fw";
 292                 break;
 293         case EDGE_DOWNLOAD_FILE_80251:
 294                 fw_name = "edgeport/boot2.fw";
 295                 break;
 296         default:
 297                 return;
 298         }
 299
 300         response = request_ihex_firmware(&fw, fw_name,
 301                                          &edge_serial->serial->dev->dev);
 302         if (response) {
 303                 dev_err(dev, "Failed to load image \"%s\" err %d\n",
 304                        fw_name, response);
 305                 return;
 306         }
 307
 308         rec = (const struct ihex_binrec *)fw->data;
 309         BootMajorVersion = rec->data[0];
 310         BootMinorVersion = rec->data[1];
 311         BootBuildNumber = (rec->data[2] << 8) | rec->data[3];
 312
 313         /* Check Boot Image Version */
 314         BootCurVer = (edge_serial->boot_descriptor.MajorVersion << 24) +
 315                      (edge_serial->boot_descriptor.MinorVersion << 16) +
 316                       le16_to_cpu(edge_serial->boot_descriptor.BuildNumber);
 317
 318         BootNewVer = (BootMajorVersion << 24) +
 319                      (BootMinorVersion << 16) +
 320                       BootBuildNumber;
 321
 322         dev_dbg(dev, "Current Boot Image version %d.%d.%d\n",
 323             edge_serial->boot_descriptor.MajorVersion,
 324             edge_serial->boot_descriptor.MinorVersion,
 325             le16_to_cpu(edge_serial->boot_descriptor.BuildNumber));
 326
 327
 328         if (BootNewVer > BootCurVer) {
 329                 dev_dbg(dev, "**Update Boot Image from %d.%d.%d to %d.%d.%d\n",
 330                     edge_serial->boot_descriptor.MajorVersion,
 331                     edge_serial->boot_descriptor.MinorVersion,
 332                     le16_to_cpu(edge_serial->boot_descriptor.BuildNumber),
 333                     BootMajorVersion, BootMinorVersion, BootBuildNumber);
 334
 335                 dev_dbg(dev, "Downloading new Boot Image\n");
 336
 337                 for (rec = ihex_next_binrec(rec); rec;
 338                      rec = ihex_next_binrec(rec)) {
 339                         Bootaddr = be32_to_cpu(rec->addr);
 340                         response = rom_write(edge_serial->serial,
 341                                              Bootaddr >> 16,
 342                                              Bootaddr & 0xFFFF,
 343                                              be16_to_cpu(rec->len),
 344                                              &rec->data[0]);
 345                         if (response < 0) {
 346                                 dev_err(&edge_serial->serial->dev->dev,
 347                                         "rom_write failed (%x, %x, %d)\n",
 348                                         Bootaddr >> 16, Bootaddr & 0xFFFF,
 349                                         be16_to_cpu(rec->len));
 350                                 break;
 351                         }
 352                 }
 353         } else {
 354                 dev_dbg(dev, "Boot Image -- already up to date\n");
 355         }
 356         release_firmware(fw);
 357 }
 358
 359 #if 0
 360 /************************************************************************
 361  *
 362  *  Get string descriptor from device
 363  *
 364  ************************************************************************/
 365 static int get_string_desc(struct usb_device *dev, int Id,
 366                                 struct usb_string_descriptor **pRetDesc)
 367 {
 368         struct usb_string_descriptor StringDesc;
 369         struct usb_string_descriptor *pStringDesc;
 370
 371         dev_dbg(&dev->dev, "%s - USB String ID = %d\n", __func__, Id);
 372
 373         if (!usb_get_descriptor(dev, USB_DT_STRING, Id, &StringDesc,
 374                                                 sizeof(StringDesc)))
 375                 return 0;
 376
 377         pStringDesc = kmalloc(StringDesc.bLength, GFP_KERNEL);
 378         if (!pStringDesc)
 379                 return -1;
 380
 381         if (!usb_get_descriptor(dev, USB_DT_STRING, Id, pStringDesc,
 382                                                         StringDesc.bLength)) {
 383                 kfree(pStringDesc);
 384                 return -1;
 385         }
 386
 387         *pRetDesc = pStringDesc;
 388         return 0;
 389 }
 390 #endif
 391
 392 static void dump_product_info(struct edgeport_serial *edge_serial,
 393                               struct edgeport_product_info *product_info)
 394 {
 395         struct device *dev = &edge_serial->serial->dev->dev;
 396
 397         /* Dump Product Info structure */
 398         dev_dbg(dev, "**Product Information:\n");
 399         dev_dbg(dev, "  ProductId             %x\n", product_info->ProductId);
 400         dev_dbg(dev, "  NumPorts              %d\n", product_info->NumPorts);
 401         dev_dbg(dev, "  ProdInfoVer           %d\n", product_info->ProdInfoVer);
 402         dev_dbg(dev, "  IsServer              %d\n", product_info->IsServer);
 403         dev_dbg(dev, "  IsRS232               %d\n", product_info->IsRS232);
 404         dev_dbg(dev, "  IsRS422               %d\n", product_info->IsRS422);
 405         dev_dbg(dev, "  IsRS485               %d\n", product_info->IsRS485);
 406         dev_dbg(dev, "  RomSize               %d\n", product_info->RomSize);
 407         dev_dbg(dev, "  RamSize               %d\n", product_info->RamSize);
 408         dev_dbg(dev, "  CpuRev                %x\n", product_info->CpuRev);
 409         dev_dbg(dev, "  BoardRev              %x\n", product_info->BoardRev);
 410         dev_dbg(dev, "  BootMajorVersion      %d.%d.%d\n",
 411                 product_info->BootMajorVersion,
 412                 product_info->BootMinorVersion,
 413                 le16_to_cpu(product_info->BootBuildNumber));
 414         dev_dbg(dev, "  FirmwareMajorVersion  %d.%d.%d\n",
 415                 product_info->FirmwareMajorVersion,
 416                 product_info->FirmwareMinorVersion,
 417                 le16_to_cpu(product_info->FirmwareBuildNumber));
 418         dev_dbg(dev, "  ManufactureDescDate   %d/%d/%d\n",
 419                 product_info->ManufactureDescDate[0],
 420                 product_info->ManufactureDescDate[1],
 421                 product_info->ManufactureDescDate[2]+1900);
 422         dev_dbg(dev, "  iDownloadFile         0x%x\n",
 423                 product_info->iDownloadFile);
 424         dev_dbg(dev, "  EpicVer               %d\n", product_info->EpicVer);
 425 }
 426
 427 static void get_product_info(struct edgeport_serial *edge_serial)
 428 {
 429         struct edgeport_product_info *product_info = &edge_serial->product_info;
 430
 431         memset(product_info, 0, sizeof(struct edgeport_product_info));
 432
 433         product_info->ProductId = (__u16)(le16_to_cpu(edge_serial->serial->dev->descriptor.idProduct) & ~ION_DEVICE_ID_80251_NETCHIP);
 434         product_info->NumPorts = edge_serial->manuf_descriptor.NumPorts;
 435         product_info->ProdInfoVer = 0;
 436
 437         product_info->RomSize = edge_serial->manuf_descriptor.RomSize;
 438         product_info->RamSize = edge_serial->manuf_descriptor.RamSize;
 439         product_info->CpuRev = edge_serial->manuf_descriptor.CpuRev;
 440         product_info->BoardRev = edge_serial->manuf_descriptor.BoardRev;
 441
 442         product_info->BootMajorVersion =
 443                                 edge_serial->boot_descriptor.MajorVersion;
 444         product_info->BootMinorVersion =
 445                                 edge_serial->boot_descriptor.MinorVersion;
 446         product_info->BootBuildNumber =
 447                                 edge_serial->boot_descriptor.BuildNumber;
 448
 449         memcpy(product_info->ManufactureDescDate,
 450                         edge_serial->manuf_descriptor.DescDate,
 451                         sizeof(edge_serial->manuf_descriptor.DescDate));
 452
 453         /* check if this is 2nd generation hardware */
 454         if (le16_to_cpu(edge_serial->serial->dev->descriptor.idProduct)
 455                                             & ION_DEVICE_ID_80251_NETCHIP)
 456                 product_info->iDownloadFile = EDGE_DOWNLOAD_FILE_80251;
 457         else
 458                 product_info->iDownloadFile = EDGE_DOWNLOAD_FILE_I930;
 459
 460         /* Determine Product type and set appropriate flags */
 461         switch (DEVICE_ID_FROM_USB_PRODUCT_ID(product_info->ProductId)) {
 462         case ION_DEVICE_ID_EDGEPORT_COMPATIBLE:
 463         case ION_DEVICE_ID_EDGEPORT_4T:
 464         case ION_DEVICE_ID_EDGEPORT_4:
 465         case ION_DEVICE_ID_EDGEPORT_2:
 466         case ION_DEVICE_ID_EDGEPORT_8_DUAL_CPU:
 467         case ION_DEVICE_ID_EDGEPORT_8:
 468         case ION_DEVICE_ID_EDGEPORT_421:
 469         case ION_DEVICE_ID_EDGEPORT_21:
 470         case ION_DEVICE_ID_EDGEPORT_2_DIN:
 471         case ION_DEVICE_ID_EDGEPORT_4_DIN:
 472         case ION_DEVICE_ID_EDGEPORT_16_DUAL_CPU:
 473                 product_info->IsRS232 = 1;
 474                 break;
 475
 476         case ION_DEVICE_ID_EDGEPORT_2I: /* Edgeport/2 RS422/RS485 */
 477                 product_info->IsRS422 = 1;
 478                 product_info->IsRS485 = 1;
 479                 break;
 480
 481         case ION_DEVICE_ID_EDGEPORT_8I: /* Edgeport/4 RS422 */
 482         case ION_DEVICE_ID_EDGEPORT_4I: /* Edgeport/4 RS422 */
 483                 product_info->IsRS422 = 1;
 484                 break;
 485         }
 486
 487         dump_product_info(edge_serial, product_info);
 488 }
 489
 490 static int get_epic_descriptor(struct edgeport_serial *ep)
 491 {
 492         int result;
 493         struct usb_serial *serial = ep->serial;
 494         struct edgeport_product_info *product_info = &ep->product_info;
 495         struct edge_compatibility_descriptor *epic;
 496         struct edge_compatibility_bits *bits;
 497         struct device *dev = &serial->dev->dev;
 498
 499         ep->is_epic = 0;
 500
 501         epic = kmalloc(sizeof(*epic), GFP_KERNEL);
 502         if (!epic)
 503                 return -ENOMEM;
 504
 505         result = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
 506                                  USB_REQUEST_ION_GET_EPIC_DESC,
 507                                  0xC0, 0x00, 0x00,
 508                                  epic, sizeof(*epic),
 509                                  300);
 510         if (result == sizeof(*epic)) {
 511                 ep->is_epic = 1;
 512                 memcpy(&ep->epic_descriptor, epic, sizeof(*epic));
 513                 memset(product_info, 0, sizeof(struct edgeport_product_info));
 514
 515                 product_info->NumPorts = epic->NumPorts;
 516                 product_info->ProdInfoVer = 0;
 517                 product_info->FirmwareMajorVersion = epic->MajorVersion;
 518                 product_info->FirmwareMinorVersion = epic->MinorVersion;
 519                 product_info->FirmwareBuildNumber = epic->BuildNumber;
 520                 product_info->iDownloadFile = epic->iDownloadFile;
 521                 product_info->EpicVer = epic->EpicVer;
 522                 product_info->Epic = epic->Supports;
 523                 product_info->ProductId = ION_DEVICE_ID_EDGEPORT_COMPATIBLE;
 524                 dump_product_info(ep, product_info);
 525
 526                 bits = &ep->epic_descriptor.Supports;
 527                 dev_dbg(dev, "**EPIC descriptor:\n");
 528                 dev_dbg(dev, "  VendEnableSuspend: %s\n", bits->VendEnableSuspend ? "TRUE": "FALSE");
 529                 dev_dbg(dev, "  IOSPOpen         : %s\n", bits->IOSPOpen        ? "TRUE": "FALSE");
 530                 dev_dbg(dev, "  IOSPClose        : %s\n", bits->IOSPClose       ? "TRUE": "FALSE");
 531                 dev_dbg(dev, "  IOSPChase        : %s\n", bits->IOSPChase       ? "TRUE": "FALSE");
 532                 dev_dbg(dev, "  IOSPSetRxFlow    : %s\n", bits->IOSPSetRxFlow   ? "TRUE": "FALSE");
 533                 dev_dbg(dev, "  IOSPSetTxFlow    : %s\n", bits->IOSPSetTxFlow   ? "TRUE": "FALSE");
 534                 dev_dbg(dev, "  IOSPSetXChar     : %s\n", bits->IOSPSetXChar    ? "TRUE": "FALSE");
 535                 dev_dbg(dev, "  IOSPRxCheck      : %s\n", bits->IOSPRxCheck     ? "TRUE": "FALSE");
 536                 dev_dbg(dev, "  IOSPSetClrBreak  : %s\n", bits->IOSPSetClrBreak ? "TRUE": "FALSE");
 537                 dev_dbg(dev, "  IOSPWriteMCR     : %s\n", bits->IOSPWriteMCR    ? "TRUE": "FALSE");
 538                 dev_dbg(dev, "  IOSPWriteLCR     : %s\n", bits->IOSPWriteLCR    ? "TRUE": "FALSE");
 539                 dev_dbg(dev, "  IOSPSetBaudRate  : %s\n", bits->IOSPSetBaudRate ? "TRUE": "FALSE");
 540                 dev_dbg(dev, "  TrueEdgeport     : %s\n", bits->TrueEdgeport    ? "TRUE": "FALSE");
 541
 542                 result = 0;
 543         } else if (result >= 0) {
 544                 dev_warn(&serial->interface->dev, "short epic descriptor received: %d\n",
 545                          result);
 546                 result = -EIO;
 547         }
 548
 549         kfree(epic);
 550
 551         return result;
 552 }
 553
 554
 555 /************************************************************************/
 556 /************************************************************************/
 557 /*            U S B  C A L L B A C K   F U N C T I O N S                */
 558 /*            U S B  C A L L B A C K   F U N C T I O N S                */
 559 /************************************************************************/
 560 /************************************************************************/
 561
 562 /*****************************************************************************
 563  * edge_interrupt_callback
 564  *      this is the callback function for when we have received data on the
 565  *      interrupt endpoint.
 566  *****************************************************************************/
 567 static void edge_interrupt_callback(struct urb *urb)
 568 {
 569         struct edgeport_serial *edge_serial = urb->context;
 570         struct device *dev;
 571         struct edgeport_port *edge_port;
 572         struct usb_serial_port *port;
 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_port_tty_wakeup(&edge_port->port->port);
 652                                         /* Since we have more credit, check
 653                                            if more data can be sent */
 654                                         send_more_port_data(edge_serial,
 655                                                                 edge_port);
 656                                 }
 657                         }
 658                         position += 2;
 659                         ++portNumber;
 660                 }
 661         }
 662
 663 exit:
 664         result = usb_submit_urb(urb, GFP_ATOMIC);
 665         if (result)
 666                 dev_err(&urb->dev->dev,
 667                         "%s - Error %d submitting control urb\n",
 668                                                 __func__, result);
 669 }
 670
 671
 672 /*****************************************************************************
 673  * edge_bulk_in_callback
 674  *      this is the callback function for when we have received data on the
 675  *      bulk in endpoint.
 676  *****************************************************************************/
 677 static void edge_bulk_in_callback(struct urb *urb)
 678 {
 679         struct edgeport_serial  *edge_serial = urb->context;
 680         struct device *dev;
 681         unsigned char           *data = urb->transfer_buffer;
 682         int                     retval;
 683         __u16                   raw_data_length;
 684         int status = urb->status;
 685
 686         if (status) {
 687                 dev_dbg(&urb->dev->dev, "%s - nonzero read bulk status received: %d\n",
 688                         __func__, status);
 689                 edge_serial->read_in_progress = false;
 690                 return;
 691         }
 692
 693         if (urb->actual_length == 0) {
 694                 dev_dbg(&urb->dev->dev, "%s - read bulk callback with no data\n", __func__);
 695                 edge_serial->read_in_progress = false;
 696                 return;
 697         }
 698
 699         dev = &edge_serial->serial->dev->dev;
 700         raw_data_length = urb->actual_length;
 701
 702         usb_serial_debug_data(dev, __func__, raw_data_length, data);
 703
 704         spin_lock(&edge_serial->es_lock);
 705
 706         /* decrement our rxBytes available by the number that we just got */
 707         edge_serial->rxBytesAvail -= raw_data_length;
 708
 709         dev_dbg(dev, "%s - Received = %d, rxBytesAvail %d\n", __func__,
 710                 raw_data_length, edge_serial->rxBytesAvail);
 711
 712         process_rcvd_data(edge_serial, data, urb->actual_length);
 713
 714         /* check to see if there's any more data for us to read */
 715         if (edge_serial->rxBytesAvail > 0) {
 716                 dev_dbg(dev, "%s - posting a read\n", __func__);
 717                 retval = usb_submit_urb(edge_serial->read_urb, GFP_ATOMIC);
 718                 if (retval) {
 719                         dev_err(dev,
 720                                 "%s - usb_submit_urb(read bulk) failed, retval = %d\n",
 721                                 __func__, retval);
 722                         edge_serial->read_in_progress = false;
 723                 }
 724         } else {
 725                 edge_serial->read_in_progress = false;
 726         }
 727
 728         spin_unlock(&edge_serial->es_lock);
 729 }
 730
 731
 732 /*****************************************************************************
 733  * edge_bulk_out_data_callback
 734  *      this is the callback function for when we have finished sending
 735  *      serial data on the bulk out endpoint.
 736  *****************************************************************************/
 737 static void edge_bulk_out_data_callback(struct urb *urb)
 738 {
 739         struct edgeport_port *edge_port = urb->context;
 740         int status = urb->status;
 741
 742         if (status) {
 743                 dev_dbg(&urb->dev->dev,
 744                         "%s - nonzero write bulk status received: %d\n",
 745                         __func__, status);
 746         }
 747
 748         if (edge_port->open)
 749                 tty_port_tty_wakeup(&edge_port->port->port);
 750
 751         /* Release the Write URB */
 752         edge_port->write_in_progress = false;
 753
 754         /* Check if more data needs to be sent */
 755         send_more_port_data((struct edgeport_serial *)
 756                 (usb_get_serial_data(edge_port->port->serial)), edge_port);
 757 }
 758
 759
 760 /*****************************************************************************
 761  * BulkOutCmdCallback
 762  *      this is the callback function for when we have finished sending a
 763  *      command on the bulk out endpoint.
 764  *****************************************************************************/
 765 static void edge_bulk_out_cmd_callback(struct urb *urb)
 766 {
 767         struct edgeport_port *edge_port = urb->context;
 768         int status = urb->status;
 769
 770         atomic_dec(&CmdUrbs);
 771         dev_dbg(&urb->dev->dev, "%s - FREE URB %p (outstanding %d)\n",
 772                 __func__, urb, atomic_read(&CmdUrbs));
 773
 774
 775         /* clean up the transfer buffer */
 776         kfree(urb->transfer_buffer);
 777
 778         /* Free the command urb */
 779         usb_free_urb(urb);
 780
 781         if (status) {
 782                 dev_dbg(&urb->dev->dev,
 783                         "%s - nonzero write bulk status received: %d\n",
 784                         __func__, status);
 785                 return;
 786         }
 787
 788         /* tell the tty driver that something has changed */
 789         if (edge_port->open)
 790                 tty_port_tty_wakeup(&edge_port->port->port);
 791
 792         /* we have completed the command */
 793         edge_port->commandPending = false;
 794         wake_up(&edge_port->wait_command);
 795 }
 796
 797
 798 /*****************************************************************************
 799  * Driver tty interface functions
 800  *****************************************************************************/
 801
 802 /*****************************************************************************
 803  * SerialOpen
 804  *      this function is called by the tty driver when a port is opened
 805  *      If successful, we return 0
 806  *      Otherwise we return a negative error number.
 807  *****************************************************************************/
 808 static int edge_open(struct tty_struct *tty, struct usb_serial_port *port)
 809 {
 810         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
 811         struct device *dev = &port->dev;
 812         struct usb_serial *serial;
 813         struct edgeport_serial *edge_serial;
 814         int response;
 815
 816         if (edge_port == NULL)
 817                 return -ENODEV;
 818
 819         /* see if we've set up our endpoint info yet (can't set it up
 820            in edge_startup as the structures were not set up at that time.) */
 821         serial = port->serial;
 822         edge_serial = usb_get_serial_data(serial);
 823         if (edge_serial == NULL)
 824                 return -ENODEV;
 825         if (edge_serial->interrupt_in_buffer == NULL) {
 826                 struct usb_serial_port *port0 = serial->port[0];
 827
 828                 /* not set up yet, so do it now */
 829                 edge_serial->interrupt_in_buffer =
 830                                         port0->interrupt_in_buffer;
 831                 edge_serial->interrupt_in_endpoint =
 832                                         port0->interrupt_in_endpointAddress;
 833                 edge_serial->interrupt_read_urb = port0->interrupt_in_urb;
 834                 edge_serial->bulk_in_buffer = port0->bulk_in_buffer;
 835                 edge_serial->bulk_in_endpoint =
 836                                         port0->bulk_in_endpointAddress;
 837                 edge_serial->read_urb = port0->read_urb;
 838                 edge_serial->bulk_out_endpoint =
 839                                         port0->bulk_out_endpointAddress;
 840
 841                 /* set up our interrupt urb */
 842                 usb_fill_int_urb(edge_serial->interrupt_read_urb,
 843                       serial->dev,
 844                       usb_rcvintpipe(serial->dev,
 845                                 port0->interrupt_in_endpointAddress),
 846                       port0->interrupt_in_buffer,
 847                       edge_serial->interrupt_read_urb->transfer_buffer_length,
 848                       edge_interrupt_callback, edge_serial,
 849                       edge_serial->interrupt_read_urb->interval);
 850
 851                 /* set up our bulk in urb */
 852                 usb_fill_bulk_urb(edge_serial->read_urb, serial->dev,
 853                         usb_rcvbulkpipe(serial->dev,
 854                                 port0->bulk_in_endpointAddress),
 855                         port0->bulk_in_buffer,
 856                         edge_serial->read_urb->transfer_buffer_length,
 857                         edge_bulk_in_callback, edge_serial);
 858                 edge_serial->read_in_progress = false;
 859
 860                 /* start interrupt read for this edgeport
 861                  * this interrupt will continue as long
 862                  * as the edgeport is connected */
 863                 response = usb_submit_urb(edge_serial->interrupt_read_urb,
 864                                                                 GFP_KERNEL);
 865                 if (response) {
 866                         dev_err(dev, "%s - Error %d submitting control urb\n",
 867                                 __func__, response);
 868                 }
 869         }
 870
 871         /* initialize our wait queues */
 872         init_waitqueue_head(&edge_port->wait_open);
 873         init_waitqueue_head(&edge_port->wait_chase);
 874         init_waitqueue_head(&edge_port->wait_command);
 875
 876         /* initialize our port settings */
 877         edge_port->txCredits = 0;       /* Can't send any data yet */
 878         /* Must always set this bit to enable ints! */
 879         edge_port->shadowMCR = MCR_MASTER_IE;
 880         edge_port->chaseResponsePending = false;
 881
 882         /* send a open port command */
 883         edge_port->openPending = true;
 884         edge_port->open        = false;
 885         response = send_iosp_ext_cmd(edge_port, IOSP_CMD_OPEN_PORT, 0);
 886
 887         if (response < 0) {
 888                 dev_err(dev, "%s - error sending open port command\n", __func__);
 889                 edge_port->openPending = false;
 890                 return -ENODEV;
 891         }
 892
 893         /* now wait for the port to be completely opened */
 894         wait_event_timeout(edge_port->wait_open, !edge_port->openPending,
 895                                                                 OPEN_TIMEOUT);
 896
 897         if (!edge_port->open) {
 898                 /* open timed out */
 899                 dev_dbg(dev, "%s - open timedout\n", __func__);
 900                 edge_port->openPending = false;
 901                 return -ENODEV;
 902         }
 903
 904         /* create the txfifo */
 905         edge_port->txfifo.head  = 0;
 906         edge_port->txfifo.tail  = 0;
 907         edge_port->txfifo.count = 0;
 908         edge_port->txfifo.size  = edge_port->maxTxCredits;
 909         edge_port->txfifo.fifo  = kmalloc(edge_port->maxTxCredits, GFP_KERNEL);
 910
 911         if (!edge_port->txfifo.fifo) {
 912                 edge_close(port);
 913                 return -ENOMEM;
 914         }
 915
 916         /* Allocate a URB for the write */
 917         edge_port->write_urb = usb_alloc_urb(0, GFP_KERNEL);
 918         edge_port->write_in_progress = false;
 919
 920         if (!edge_port->write_urb) {
 921                 edge_close(port);
 922                 return -ENOMEM;
 923         }
 924
 925         dev_dbg(dev, "%s - Initialize TX fifo to %d bytes\n",
 926                 __func__, edge_port->maxTxCredits);
 927
 928         return 0;
 929 }
 930
 931
 932 /************************************************************************
 933  *
 934  * block_until_chase_response
 935  *
 936  *      This function will block the close until one of the following:
 937  *              1. Response to our Chase comes from Edgeport
 938  *              2. A timeout of 10 seconds without activity has expired
 939  *                 (1K of Edgeport data @ 2400 baud ==> 4 sec to empty)
 940  *
 941  ************************************************************************/
 942 static void block_until_chase_response(struct edgeport_port *edge_port)
 943 {
 944         struct device *dev = &edge_port->port->dev;
 945         DEFINE_WAIT(wait);
 946         __u16 lastCredits;
 947         int timeout = 1*HZ;
 948         int loop = 10;
 949
 950         while (1) {
 951                 /* Save Last credits */
 952                 lastCredits = edge_port->txCredits;
 953
 954                 /* Did we get our Chase response */
 955                 if (!edge_port->chaseResponsePending) {
 956                         dev_dbg(dev, "%s - Got Chase Response\n", __func__);
 957
 958                         /* did we get all of our credit back? */
 959                         if (edge_port->txCredits == edge_port->maxTxCredits) {
 960                                 dev_dbg(dev, "%s - Got all credits\n", __func__);
 961                                 return;
 962                         }
 963                 }
 964
 965                 /* Block the thread for a while */
 966                 prepare_to_wait(&edge_port->wait_chase, &wait,
 967                                                 TASK_UNINTERRUPTIBLE);
 968                 schedule_timeout(timeout);
 969                 finish_wait(&edge_port->wait_chase, &wait);
 970
 971                 if (lastCredits == edge_port->txCredits) {
 972                         /* No activity.. count down. */
 973                         loop--;
 974                         if (loop == 0) {
 975                                 edge_port->chaseResponsePending = false;
 976                                 dev_dbg(dev, "%s - Chase TIMEOUT\n", __func__);
 977                                 return;
 978                         }
 979                 } else {
 980                         /* Reset timeout value back to 10 seconds */
 981                         dev_dbg(dev, "%s - Last %d, Current %d\n", __func__,
 982                                         lastCredits, edge_port->txCredits);
 983                         loop = 10;
 984                 }
 985         }
 986 }
 987
 988
 989 /************************************************************************
 990  *
 991  * block_until_tx_empty
 992  *
 993  *      This function will block the close until one of the following:
 994  *              1. TX count are 0
 995  *              2. The edgeport has stopped
 996  *              3. A timeout of 3 seconds without activity has expired
 997  *
 998  ************************************************************************/
 999 static void block_until_tx_empty(struct edgeport_port *edge_port)
1000 {
1001         struct device *dev = &edge_port->port->dev;
1002         DEFINE_WAIT(wait);
1003         struct TxFifo *fifo = &edge_port->txfifo;
1004         __u32 lastCount;
1005         int timeout = HZ/10;
1006         int loop = 30;
1007
1008         while (1) {
1009                 /* Save Last count */
1010                 lastCount = fifo->count;
1011
1012                 /* Is the Edgeport Buffer empty? */
1013                 if (lastCount == 0) {
1014                         dev_dbg(dev, "%s - TX Buffer Empty\n", __func__);
1015                         return;
1016                 }
1017
1018                 /* Block the thread for a while */
1019                 prepare_to_wait(&edge_port->wait_chase, &wait,
1020                                                 TASK_UNINTERRUPTIBLE);
1021                 schedule_timeout(timeout);
1022                 finish_wait(&edge_port->wait_chase, &wait);
1023
1024                 dev_dbg(dev, "%s wait\n", __func__);
1025
1026                 if (lastCount == fifo->count) {
1027                         /* No activity.. count down. */
1028                         loop--;
1029                         if (loop == 0) {
1030                                 dev_dbg(dev, "%s - TIMEOUT\n", __func__);
1031                                 return;
1032                         }
1033                 } else {
1034                         /* Reset timeout value back to seconds */
1035                         loop = 30;
1036                 }
1037         }
1038 }
1039
1040
1041 /*****************************************************************************
1042  * edge_close
1043  *      this function is called by the tty driver when a port is closed
1044  *****************************************************************************/
1045 static void edge_close(struct usb_serial_port *port)
1046 {
1047         struct edgeport_serial *edge_serial;
1048         struct edgeport_port *edge_port;
1049         int status;
1050
1051         edge_serial = usb_get_serial_data(port->serial);
1052         edge_port = usb_get_serial_port_data(port);
1053         if (edge_serial == NULL || edge_port == NULL)
1054                 return;
1055
1056         /* block until tx is empty */
1057         block_until_tx_empty(edge_port);
1058
1059         edge_port->closePending = true;
1060
1061         if ((!edge_serial->is_epic) ||
1062             ((edge_serial->is_epic) &&
1063              (edge_serial->epic_descriptor.Supports.IOSPChase))) {
1064                 /* flush and chase */
1065                 edge_port->chaseResponsePending = true;
1066
1067                 dev_dbg(&port->dev, "%s - Sending IOSP_CMD_CHASE_PORT\n", __func__);
1068                 status = send_iosp_ext_cmd(edge_port, IOSP_CMD_CHASE_PORT, 0);
1069                 if (status == 0)
1070                         /* block until chase finished */
1071                         block_until_chase_response(edge_port);
1072                 else
1073                         edge_port->chaseResponsePending = false;
1074         }
1075
1076         if ((!edge_serial->is_epic) ||
1077             ((edge_serial->is_epic) &&
1078              (edge_serial->epic_descriptor.Supports.IOSPClose))) {
1079                /* close the port */
1080                 dev_dbg(&port->dev, "%s - Sending IOSP_CMD_CLOSE_PORT\n", __func__);
1081                 send_iosp_ext_cmd(edge_port, IOSP_CMD_CLOSE_PORT, 0);
1082         }
1083
1084         /* port->close = true; */
1085         edge_port->closePending = false;
1086         edge_port->open = false;
1087         edge_port->openPending = false;
1088
1089         usb_kill_urb(edge_port->write_urb);
1090
1091         if (edge_port->write_urb) {
1092                 /* if this urb had a transfer buffer already
1093                                 (old transfer) free it */
1094                 kfree(edge_port->write_urb->transfer_buffer);
1095                 usb_free_urb(edge_port->write_urb);
1096                 edge_port->write_urb = NULL;
1097         }
1098         kfree(edge_port->txfifo.fifo);
1099         edge_port->txfifo.fifo = NULL;
1100 }
1101
1102 /*****************************************************************************
1103  * SerialWrite
1104  *      this function is called by the tty driver when data should be written
1105  *      to the port.
1106  *      If successful, we return the number of bytes written, otherwise we
1107  *      return a negative error number.
1108  *****************************************************************************/
1109 static int edge_write(struct tty_struct *tty, struct usb_serial_port *port,
1110                                         const unsigned char *data, int count)
1111 {
1112         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1113         struct TxFifo *fifo;
1114         int copySize;
1115         int bytesleft;
1116         int firsthalf;
1117         int secondhalf;
1118         unsigned long flags;
1119
1120         if (edge_port == NULL)
1121                 return -ENODEV;
1122
1123         /* get a pointer to the Tx fifo */
1124         fifo = &edge_port->txfifo;
1125
1126         spin_lock_irqsave(&edge_port->ep_lock, flags);
1127
1128         /* calculate number of bytes to put in fifo */
1129         copySize = min((unsigned int)count,
1130                                 (edge_port->txCredits - fifo->count));
1131
1132         dev_dbg(&port->dev, "%s of %d byte(s) Fifo room  %d -- will copy %d bytes\n",
1133                 __func__, count, edge_port->txCredits - fifo->count, copySize);
1134
1135         /* catch writes of 0 bytes which the tty driver likes to give us,
1136            and when txCredits is empty */
1137         if (copySize == 0) {
1138                 dev_dbg(&port->dev, "%s - copySize = Zero\n", __func__);
1139                 goto finish_write;
1140         }
1141
1142         /* queue the data
1143          * since we can never overflow the buffer we do not have to check for a
1144          * full condition
1145          *
1146          * the copy is done is two parts -- first fill to the end of the buffer
1147          * then copy the reset from the start of the buffer
1148          */
1149         bytesleft = fifo->size - fifo->head;
1150         firsthalf = min(bytesleft, copySize);
1151         dev_dbg(&port->dev, "%s - copy %d bytes of %d into fifo \n", __func__,
1152                 firsthalf, bytesleft);
1153
1154         /* now copy our data */
1155         memcpy(&fifo->fifo[fifo->head], data, firsthalf);
1156         usb_serial_debug_data(&port->dev, __func__, firsthalf, &fifo->fifo[fifo->head]);
1157
1158         /* update the index and size */
1159         fifo->head  += firsthalf;
1160         fifo->count += firsthalf;
1161
1162         /* wrap the index */
1163         if (fifo->head == fifo->size)
1164                 fifo->head = 0;
1165
1166         secondhalf = copySize-firsthalf;
1167
1168         if (secondhalf) {
1169                 dev_dbg(&port->dev, "%s - copy rest of data %d\n", __func__, secondhalf);
1170                 memcpy(&fifo->fifo[fifo->head], &data[firsthalf], secondhalf);
1171                 usb_serial_debug_data(&port->dev, __func__, secondhalf, &fifo->fifo[fifo->head]);
1172                 /* update the index and size */
1173                 fifo->count += secondhalf;
1174                 fifo->head  += secondhalf;
1175                 /* No need to check for wrap since we can not get to end of
1176                  * the fifo in this part
1177                  */
1178         }
1179
1180 finish_write:
1181         spin_unlock_irqrestore(&edge_port->ep_lock, flags);
1182
1183         send_more_port_data((struct edgeport_serial *)
1184                         usb_get_serial_data(port->serial), edge_port);
1185
1186         dev_dbg(&port->dev, "%s wrote %d byte(s) TxCredits %d, Fifo %d\n",
1187                 __func__, copySize, edge_port->txCredits, fifo->count);
1188
1189         return copySize;
1190 }
1191
1192
1193 /************************************************************************
1194  *
1195  * send_more_port_data()
1196  *
1197  *      This routine attempts to write additional UART transmit data
1198  *      to a port over the USB bulk pipe. It is called (1) when new
1199  *      data has been written to a port's TxBuffer from higher layers
1200  *      (2) when the peripheral sends us additional TxCredits indicating
1201  *      that it can accept more Tx data for a given port; and (3) when
1202  *      a bulk write completes successfully and we want to see if we
1203  *      can transmit more.
1204  *
1205  ************************************************************************/
1206 static void send_more_port_data(struct edgeport_serial *edge_serial,
1207                                         struct edgeport_port *edge_port)
1208 {
1209         struct TxFifo   *fifo = &edge_port->txfifo;
1210         struct device   *dev = &edge_port->port->dev;
1211         struct urb      *urb;
1212         unsigned char   *buffer;
1213         int             status;
1214         int             count;
1215         int             bytesleft;
1216         int             firsthalf;
1217         int             secondhalf;
1218         unsigned long   flags;
1219
1220         spin_lock_irqsave(&edge_port->ep_lock, flags);
1221
1222         if (edge_port->write_in_progress ||
1223             !edge_port->open             ||
1224             (fifo->count == 0)) {
1225                 dev_dbg(dev, "%s EXIT - fifo %d, PendingWrite = %d\n",
1226                         __func__, fifo->count, edge_port->write_in_progress);
1227                 goto exit_send;
1228         }
1229
1230         /* since the amount of data in the fifo will always fit into the
1231          * edgeport buffer we do not need to check the write length
1232          *
1233          * Do we have enough credits for this port to make it worthwhile
1234          * to bother queueing a write. If it's too small, say a few bytes,
1235          * it's better to wait for more credits so we can do a larger write.
1236          */
1237         if (edge_port->txCredits < EDGE_FW_GET_TX_CREDITS_SEND_THRESHOLD(edge_port->maxTxCredits, EDGE_FW_BULK_MAX_PACKET_SIZE)) {
1238                 dev_dbg(dev, "%s Not enough credit - fifo %d TxCredit %d\n",
1239                         __func__, fifo->count, edge_port->txCredits);
1240                 goto exit_send;
1241         }
1242
1243         /* lock this write */
1244         edge_port->write_in_progress = true;
1245
1246         /* get a pointer to the write_urb */
1247         urb = edge_port->write_urb;
1248
1249         /* make sure transfer buffer is freed */
1250         kfree(urb->transfer_buffer);
1251         urb->transfer_buffer = NULL;
1252
1253         /* build the data header for the buffer and port that we are about
1254            to send out */
1255         count = fifo->count;
1256         buffer = kmalloc(count+2, GFP_ATOMIC);
1257         if (!buffer) {
1258                 edge_port->write_in_progress = false;
1259                 goto exit_send;
1260         }
1261         buffer[0] = IOSP_BUILD_DATA_HDR1(edge_port->port->port_number, count);
1262         buffer[1] = IOSP_BUILD_DATA_HDR2(edge_port->port->port_number, count);
1263
1264         /* now copy our data */
1265         bytesleft =  fifo->size - fifo->tail;
1266         firsthalf = min(bytesleft, count);
1267         memcpy(&buffer[2], &fifo->fifo[fifo->tail], firsthalf);
1268         fifo->tail  += firsthalf;
1269         fifo->count -= firsthalf;
1270         if (fifo->tail == fifo->size)
1271                 fifo->tail = 0;
1272
1273         secondhalf = count-firsthalf;
1274         if (secondhalf) {
1275                 memcpy(&buffer[2+firsthalf], &fifo->fifo[fifo->tail],
1276                                                                 secondhalf);
1277                 fifo->tail  += secondhalf;
1278                 fifo->count -= secondhalf;
1279         }
1280
1281         if (count)
1282                 usb_serial_debug_data(&edge_port->port->dev, __func__, count, &buffer[2]);
1283
1284         /* fill up the urb with all of our data and submit it */
1285         usb_fill_bulk_urb(urb, edge_serial->serial->dev,
1286                         usb_sndbulkpipe(edge_serial->serial->dev,
1287                                         edge_serial->bulk_out_endpoint),
1288                         buffer, count+2,
1289                         edge_bulk_out_data_callback, edge_port);
1290
1291         /* decrement the number of credits we have by the number we just sent */
1292         edge_port->txCredits -= count;
1293         edge_port->port->icount.tx += count;
1294
1295         status = usb_submit_urb(urb, GFP_ATOMIC);
1296         if (status) {
1297                 /* something went wrong */
1298                 dev_err_console(edge_port->port,
1299                         "%s - usb_submit_urb(write bulk) failed, status = %d, data lost\n",
1300                                 __func__, status);
1301                 edge_port->write_in_progress = false;
1302
1303                 /* revert the credits as something bad happened. */
1304                 edge_port->txCredits += count;
1305                 edge_port->port->icount.tx -= count;
1306         }
1307         dev_dbg(dev, "%s wrote %d byte(s) TxCredit %d, Fifo %d\n",
1308                 __func__, count, edge_port->txCredits, fifo->count);
1309
1310 exit_send:
1311         spin_unlock_irqrestore(&edge_port->ep_lock, flags);
1312 }
1313
1314
1315 /*****************************************************************************
1316  * edge_write_room
1317  *      this function is called by the tty driver when it wants to know how
1318  *      many bytes of data we can accept for a specific port. If successful,
1319  *      we return the amount of room that we have for this port (the txCredits)
1320  *      otherwise we return a negative error number.
1321  *****************************************************************************/
1322 static int edge_write_room(struct tty_struct *tty)
1323 {
1324         struct usb_serial_port *port = tty->driver_data;
1325         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1326         int room;
1327         unsigned long flags;
1328
1329         if (edge_port == NULL)
1330                 return 0;
1331         if (edge_port->closePending)
1332                 return 0;
1333
1334         if (!edge_port->open) {
1335                 dev_dbg(&port->dev, "%s - port not opened\n", __func__);
1336                 return 0;
1337         }
1338
1339         /* total of both buffers is still txCredit */
1340         spin_lock_irqsave(&edge_port->ep_lock, flags);
1341         room = edge_port->txCredits - edge_port->txfifo.count;
1342         spin_unlock_irqrestore(&edge_port->ep_lock, flags);
1343
1344         dev_dbg(&port->dev, "%s - returns %d\n", __func__, room);
1345         return room;
1346 }
1347
1348
1349 /*****************************************************************************
1350  * edge_chars_in_buffer
1351  *      this function is called by the tty driver when it wants to know how
1352  *      many bytes of data we currently have outstanding in the port (data that
1353  *      has been written, but hasn't made it out the port yet)
1354  *      If successful, we return the number of bytes left to be written in the
1355  *      system,
1356  *      Otherwise we return a negative error number.
1357  *****************************************************************************/
1358 static int edge_chars_in_buffer(struct tty_struct *tty)
1359 {
1360         struct usb_serial_port *port = tty->driver_data;
1361         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1362         int num_chars;
1363         unsigned long flags;
1364
1365         if (edge_port == NULL)
1366                 return 0;
1367         if (edge_port->closePending)
1368                 return 0;
1369
1370         if (!edge_port->open) {
1371                 dev_dbg(&port->dev, "%s - port not opened\n", __func__);
1372                 return 0;
1373         }
1374
1375         spin_lock_irqsave(&edge_port->ep_lock, flags);
1376         num_chars = edge_port->maxTxCredits - edge_port->txCredits +
1377                                                 edge_port->txfifo.count;
1378         spin_unlock_irqrestore(&edge_port->ep_lock, flags);
1379         if (num_chars) {
1380                 dev_dbg(&port->dev, "%s - returns %d\n", __func__, num_chars);
1381         }
1382
1383         return num_chars;
1384 }
1385
1386
1387 /*****************************************************************************
1388  * SerialThrottle
1389  *      this function is called by the tty driver when it wants to stop the data
1390  *      being read from the port.
1391  *****************************************************************************/
1392 static void edge_throttle(struct tty_struct *tty)
1393 {
1394         struct usb_serial_port *port = tty->driver_data;
1395         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1396         int status;
1397
1398         if (edge_port == NULL)
1399                 return;
1400
1401         if (!edge_port->open) {
1402                 dev_dbg(&port->dev, "%s - port not opened\n", __func__);
1403                 return;
1404         }
1405
1406         /* if we are implementing XON/XOFF, send the stop character */
1407         if (I_IXOFF(tty)) {
1408                 unsigned char stop_char = STOP_CHAR(tty);
1409                 status = edge_write(tty, port, &stop_char, 1);
1410                 if (status <= 0)
1411                         return;
1412         }
1413
1414         /* if we are implementing RTS/CTS, toggle that line */
1415         if (tty->termios.c_cflag & CRTSCTS) {
1416                 edge_port->shadowMCR &= ~MCR_RTS;
1417                 status = send_cmd_write_uart_register(edge_port, MCR,
1418                                                         edge_port->shadowMCR);
1419                 if (status != 0)
1420                         return;
1421         }
1422 }
1423
1424
1425 /*****************************************************************************
1426  * edge_unthrottle
1427  *      this function is called by the tty driver when it wants to resume the
1428  *      data being read from the port (called after SerialThrottle is called)
1429  *****************************************************************************/
1430 static void edge_unthrottle(struct tty_struct *tty)
1431 {
1432         struct usb_serial_port *port = tty->driver_data;
1433         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1434         int status;
1435
1436         if (edge_port == NULL)
1437                 return;
1438
1439         if (!edge_port->open) {
1440                 dev_dbg(&port->dev, "%s - port not opened\n", __func__);
1441                 return;
1442         }
1443
1444         /* if we are implementing XON/XOFF, send the start character */
1445         if (I_IXOFF(tty)) {
1446                 unsigned char start_char = START_CHAR(tty);
1447                 status = edge_write(tty, port, &start_char, 1);
1448                 if (status <= 0)
1449                         return;
1450         }
1451         /* if we are implementing RTS/CTS, toggle that line */
1452         if (tty->termios.c_cflag & CRTSCTS) {
1453                 edge_port->shadowMCR |= MCR_RTS;
1454                 send_cmd_write_uart_register(edge_port, MCR,
1455                                                 edge_port->shadowMCR);
1456         }
1457 }
1458
1459
1460 /*****************************************************************************
1461  * SerialSetTermios
1462  *      this function is called by the tty driver when it wants to change
1463  * the termios structure
1464  *****************************************************************************/
1465 static void edge_set_termios(struct tty_struct *tty,
1466         struct usb_serial_port *port, struct ktermios *old_termios)
1467 {
1468         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1469         unsigned int cflag;
1470
1471         cflag = tty->termios.c_cflag;
1472         dev_dbg(&port->dev, "%s - clfag %08x iflag %08x\n", __func__, tty->termios.c_cflag, tty->termios.c_iflag);
1473         dev_dbg(&port->dev, "%s - old clfag %08x old iflag %08x\n", __func__, old_termios->c_cflag, old_termios->c_iflag);
1474
1475         if (edge_port == NULL)
1476                 return;
1477
1478         if (!edge_port->open) {
1479                 dev_dbg(&port->dev, "%s - port not opened\n", __func__);
1480                 return;
1481         }
1482
1483         /* change the port settings to the new ones specified */
1484         change_port_settings(tty, edge_port, old_termios);
1485 }
1486
1487
1488 /*****************************************************************************
1489  * get_lsr_info - get line status register info
1490  *
1491  * Purpose: Let user call ioctl() to get info when the UART physically
1492  *          is emptied.  On bus types like RS485, the transmitter must
1493  *          release the bus after transmitting. This must be done when
1494  *          the transmit shift register is empty, not be done when the
1495  *          transmit holding register is empty.  This functionality
1496  *          allows an RS485 driver to be written in user space.
1497  *****************************************************************************/
1498 static int get_lsr_info(struct edgeport_port *edge_port,
1499                                                 unsigned int __user *value)
1500 {
1501         unsigned int result = 0;
1502         unsigned long flags;
1503
1504         spin_lock_irqsave(&edge_port->ep_lock, flags);
1505         if (edge_port->maxTxCredits == edge_port->txCredits &&
1506             edge_port->txfifo.count == 0) {
1507                 dev_dbg(&edge_port->port->dev, "%s -- Empty\n", __func__);
1508                 result = TIOCSER_TEMT;
1509         }
1510         spin_unlock_irqrestore(&edge_port->ep_lock, flags);
1511
1512         if (copy_to_user(value, &result, sizeof(int)))
1513                 return -EFAULT;
1514         return 0;
1515 }
1516
1517 static int edge_tiocmset(struct tty_struct *tty,
1518                                         unsigned int set, unsigned int clear)
1519 {
1520         struct usb_serial_port *port = tty->driver_data;
1521         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1522         unsigned int mcr;
1523
1524         mcr = edge_port->shadowMCR;
1525         if (set & TIOCM_RTS)
1526                 mcr |= MCR_RTS;
1527         if (set & TIOCM_DTR)
1528                 mcr |= MCR_DTR;
1529         if (set & TIOCM_LOOP)
1530                 mcr |= MCR_LOOPBACK;
1531
1532         if (clear & TIOCM_RTS)
1533                 mcr &= ~MCR_RTS;
1534         if (clear & TIOCM_DTR)
1535                 mcr &= ~MCR_DTR;
1536         if (clear & TIOCM_LOOP)
1537                 mcr &= ~MCR_LOOPBACK;
1538
1539         edge_port->shadowMCR = mcr;
1540
1541         send_cmd_write_uart_register(edge_port, MCR, edge_port->shadowMCR);
1542
1543         return 0;
1544 }
1545
1546 static int edge_tiocmget(struct tty_struct *tty)
1547 {
1548         struct usb_serial_port *port = tty->driver_data;
1549         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1550         unsigned int result = 0;
1551         unsigned int msr;
1552         unsigned int mcr;
1553
1554         msr = edge_port->shadowMSR;
1555         mcr = edge_port->shadowMCR;
1556         result = ((mcr & MCR_DTR)       ? TIOCM_DTR: 0)   /* 0x002 */
1557                   | ((mcr & MCR_RTS)    ? TIOCM_RTS: 0)   /* 0x004 */
1558                   | ((msr & EDGEPORT_MSR_CTS)   ? TIOCM_CTS: 0)   /* 0x020 */
1559                   | ((msr & EDGEPORT_MSR_CD)    ? TIOCM_CAR: 0)   /* 0x040 */
1560                   | ((msr & EDGEPORT_MSR_RI)    ? TIOCM_RI:  0)   /* 0x080 */
1561                   | ((msr & EDGEPORT_MSR_DSR)   ? TIOCM_DSR: 0);  /* 0x100 */
1562
1563         return result;
1564 }
1565
1566 static int get_serial_info(struct edgeport_port *edge_port,
1567                                 struct serial_struct __user *retinfo)
1568 {
1569         struct serial_struct tmp;
1570
1571         if (!retinfo)
1572                 return -EFAULT;
1573
1574         memset(&tmp, 0, sizeof(tmp));
1575
1576         tmp.type                = PORT_16550A;
1577         tmp.line                = edge_port->port->minor;
1578         tmp.port                = edge_port->port->port_number;
1579         tmp.irq                 = 0;
1580         tmp.flags               = ASYNC_SKIP_TEST | ASYNC_AUTO_IRQ;
1581         tmp.xmit_fifo_size      = edge_port->maxTxCredits;
1582         tmp.baud_base           = 9600;
1583         tmp.close_delay         = 5*HZ;
1584         tmp.closing_wait        = 30*HZ;
1585
1586         if (copy_to_user(retinfo, &tmp, sizeof(*retinfo)))
1587                 return -EFAULT;
1588         return 0;
1589 }
1590
1591
1592 /*****************************************************************************
1593  * SerialIoctl
1594  *      this function handles any ioctl calls to the driver
1595  *****************************************************************************/
1596 static int edge_ioctl(struct tty_struct *tty,
1597                                         unsigned int cmd, unsigned long arg)
1598 {
1599         struct usb_serial_port *port = tty->driver_data;
1600         DEFINE_WAIT(wait);
1601         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1602
1603         switch (cmd) {
1604         case TIOCSERGETLSR:
1605                 dev_dbg(&port->dev, "%s TIOCSERGETLSR\n", __func__);
1606                 return get_lsr_info(edge_port, (unsigned int __user *) arg);
1607
1608         case TIOCGSERIAL:
1609                 dev_dbg(&port->dev, "%s TIOCGSERIAL\n", __func__);
1610                 return get_serial_info(edge_port, (struct serial_struct __user *) arg);
1611         }
1612         return -ENOIOCTLCMD;
1613 }
1614
1615
1616 /*****************************************************************************
1617  * SerialBreak
1618  *      this function sends a break to the port
1619  *****************************************************************************/
1620 static void edge_break(struct tty_struct *tty, int break_state)
1621 {
1622         struct usb_serial_port *port = tty->driver_data;
1623         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1624         struct edgeport_serial *edge_serial = usb_get_serial_data(port->serial);
1625         int status;
1626
1627         if ((!edge_serial->is_epic) ||
1628             ((edge_serial->is_epic) &&
1629              (edge_serial->epic_descriptor.Supports.IOSPChase))) {
1630                 /* flush and chase */
1631                 edge_port->chaseResponsePending = true;
1632
1633                 dev_dbg(&port->dev, "%s - Sending IOSP_CMD_CHASE_PORT\n", __func__);
1634                 status = send_iosp_ext_cmd(edge_port, IOSP_CMD_CHASE_PORT, 0);
1635                 if (status == 0) {
1636                         /* block until chase finished */
1637                         block_until_chase_response(edge_port);
1638                 } else {
1639                         edge_port->chaseResponsePending = false;
1640                 }
1641         }
1642
1643         if ((!edge_serial->is_epic) ||
1644             ((edge_serial->is_epic) &&
1645              (edge_serial->epic_descriptor.Supports.IOSPSetClrBreak))) {
1646                 if (break_state == -1) {
1647                         dev_dbg(&port->dev, "%s - Sending IOSP_CMD_SET_BREAK\n", __func__);
1648                         status = send_iosp_ext_cmd(edge_port,
1649                                                 IOSP_CMD_SET_BREAK, 0);
1650                 } else {
1651                         dev_dbg(&port->dev, "%s - Sending IOSP_CMD_CLEAR_BREAK\n", __func__);
1652                         status = send_iosp_ext_cmd(edge_port,
1653                                                 IOSP_CMD_CLEAR_BREAK, 0);
1654                 }
1655                 if (status)
1656                         dev_dbg(&port->dev, "%s - error sending break set/clear command.\n",
1657                                 __func__);
1658         }
1659 }
1660
1661
1662 /*****************************************************************************
1663  * process_rcvd_data
1664  *      this function handles the data received on the bulk in pipe.
1665  *****************************************************************************/
1666 static void process_rcvd_data(struct edgeport_serial *edge_serial,
1667                                 unsigned char *buffer, __u16 bufferLength)
1668 {
1669         struct device *dev = &edge_serial->serial->dev->dev;
1670         struct usb_serial_port *port;
1671         struct edgeport_port *edge_port;
1672         __u16 lastBufferLength;
1673         __u16 rxLen;
1674
1675         lastBufferLength = bufferLength + 1;
1676
1677         while (bufferLength > 0) {
1678                 /* failsafe incase we get a message that we don't understand */
1679                 if (lastBufferLength == bufferLength) {
1680                         dev_dbg(dev, "%s - stuck in loop, exiting it.\n", __func__);
1681                         break;
1682                 }
1683                 lastBufferLength = bufferLength;
1684
1685                 switch (edge_serial->rxState) {
1686                 case EXPECT_HDR1:
1687                         edge_serial->rxHeader1 = *buffer;
1688                         ++buffer;
1689                         --bufferLength;
1690
1691                         if (bufferLength == 0) {
1692                                 edge_serial->rxState = EXPECT_HDR2;
1693                                 break;
1694                         }
1695                         /* otherwise, drop on through */
1696                 case EXPECT_HDR2:
1697                         edge_serial->rxHeader2 = *buffer;
1698                         ++buffer;
1699                         --bufferLength;
1700
1701                         dev_dbg(dev, "%s - Hdr1=%02X Hdr2=%02X\n", __func__,
1702                                 edge_serial->rxHeader1, edge_serial->rxHeader2);
1703                         /* Process depending on whether this header is
1704                          * data or status */
1705
1706                         if (IS_CMD_STAT_HDR(edge_serial->rxHeader1)) {
1707                                 /* Decode this status header and go to
1708                                  * EXPECT_HDR1 (if we can process the status
1709                                  * with only 2 bytes), or go to EXPECT_HDR3 to
1710                                  * get the third byte. */
1711                                 edge_serial->rxPort =
1712                                     IOSP_GET_HDR_PORT(edge_serial->rxHeader1);
1713                                 edge_serial->rxStatusCode =
1714                                     IOSP_GET_STATUS_CODE(
1715                                                 edge_serial->rxHeader1);
1716
1717                                 if (!IOSP_STATUS_IS_2BYTE(
1718                                                 edge_serial->rxStatusCode)) {
1719                                         /* This status needs additional bytes.
1720                                          * Save what we have and then wait for
1721                                          * more data.
1722                                          */
1723                                         edge_serial->rxStatusParam
1724                                                 = edge_serial->rxHeader2;
1725                                         edge_serial->rxState = EXPECT_HDR3;
1726                                         break;
1727                                 }
1728                                 /* We have all the header bytes, process the
1729                                    status now */
1730                                 process_rcvd_status(edge_serial,
1731                                                 edge_serial->rxHeader2, 0);
1732                                 edge_serial->rxState = EXPECT_HDR1;
1733                                 break;
1734                         } else {
1735                                 edge_serial->rxPort =
1736                                     IOSP_GET_HDR_PORT(edge_serial->rxHeader1);
1737                                 edge_serial->rxBytesRemaining =
1738                                     IOSP_GET_HDR_DATA_LEN(
1739                                                 edge_serial->rxHeader1,
1740                                                 edge_serial->rxHeader2);
1741                                 dev_dbg(dev, "%s - Data for Port %u Len %u\n",
1742                                         __func__,
1743                                         edge_serial->rxPort,
1744                                         edge_serial->rxBytesRemaining);
1745
1746                                 /* ASSERT(DevExt->RxPort < DevExt->NumPorts);
1747                                  * ASSERT(DevExt->RxBytesRemaining <
1748                                  *              IOSP_MAX_DATA_LENGTH);
1749                                  */
1750
1751                                 if (bufferLength == 0) {
1752                                         edge_serial->rxState = EXPECT_DATA;
1753                                         break;
1754                                 }
1755                                 /* Else, drop through */
1756                         }
1757                 case EXPECT_DATA: /* Expect data */
1758                         if (bufferLength < edge_serial->rxBytesRemaining) {
1759                                 rxLen = bufferLength;
1760                                 /* Expect data to start next buffer */
1761                                 edge_serial->rxState = EXPECT_DATA;
1762                         } else {
1763                                 /* BufLen >= RxBytesRemaining */
1764                                 rxLen = edge_serial->rxBytesRemaining;
1765                                 /* Start another header next time */
1766                                 edge_serial->rxState = EXPECT_HDR1;
1767                         }
1768
1769                         bufferLength -= rxLen;
1770                         edge_serial->rxBytesRemaining -= rxLen;
1771
1772                         /* spit this data back into the tty driver if this
1773                            port is open */
1774                         if (rxLen) {
1775                                 port = edge_serial->serial->port[
1776                                                         edge_serial->rxPort];
1777                                 edge_port = usb_get_serial_port_data(port);
1778                                 if (edge_port->open) {
1779                                         dev_dbg(dev, "%s - Sending %d bytes to TTY for port %d\n",
1780                                                 __func__, rxLen,
1781                                                 edge_serial->rxPort);
1782                                         edge_tty_recv(edge_port->port, buffer,
1783                                                         rxLen);
1784                                         edge_port->port->icount.rx += rxLen;
1785                                 }
1786                                 buffer += rxLen;
1787                         }
1788                         break;
1789
1790                 case EXPECT_HDR3:       /* Expect 3rd byte of status header */
1791                         edge_serial->rxHeader3 = *buffer;
1792                         ++buffer;
1793                         --bufferLength;
1794
1795                         /* We have all the header bytes, process the
1796                            status now */
1797                         process_rcvd_status(edge_serial,
1798                                 edge_serial->rxStatusParam,
1799                                 edge_serial->rxHeader3);
1800                         edge_serial->rxState = EXPECT_HDR1;
1801                         break;
1802                 }
1803         }
1804 }
1805
1806
1807 /*****************************************************************************
1808  * process_rcvd_status
1809  *      this function handles the any status messages received on the
1810  *      bulk in pipe.
1811  *****************************************************************************/
1812 static void process_rcvd_status(struct edgeport_serial *edge_serial,
1813                                                 __u8 byte2, __u8 byte3)
1814 {
1815         struct usb_serial_port *port;
1816         struct edgeport_port *edge_port;
1817         struct tty_struct *tty;
1818         struct device *dev;
1819         __u8 code = edge_serial->rxStatusCode;
1820
1821         /* switch the port pointer to the one being currently talked about */
1822         port = edge_serial->serial->port[edge_serial->rxPort];
1823         edge_port = usb_get_serial_port_data(port);
1824         if (edge_port == NULL) {
1825                 dev_err(&edge_serial->serial->dev->dev,
1826                         "%s - edge_port == NULL for port %d\n",
1827                                         __func__, edge_serial->rxPort);
1828                 return;
1829         }
1830         dev = &port->dev;
1831
1832         if (code == IOSP_EXT_STATUS) {
1833                 switch (byte2) {
1834                 case IOSP_EXT_STATUS_CHASE_RSP:
1835                         /* we want to do EXT status regardless of port
1836                          * open/closed */
1837                         dev_dbg(dev, "%s - Port %u EXT CHASE_RSP Data = %02x\n",
1838                                 __func__, edge_serial->rxPort, byte3);
1839                         /* Currently, the only EXT_STATUS is Chase, so process
1840                          * here instead of one more call to one more subroutine
1841                          * If/when more EXT_STATUS, there'll be more work to do
1842                          * Also, we currently clear flag and close the port
1843                          * regardless of content of above's Byte3.
1844                          * We could choose to do something else when Byte3 says
1845                          * Timeout on Chase from Edgeport, like wait longer in
1846                          * block_until_chase_response, but for now we don't.
1847                          */
1848                         edge_port->chaseResponsePending = false;
1849                         wake_up(&edge_port->wait_chase);
1850                         return;
1851
1852                 case IOSP_EXT_STATUS_RX_CHECK_RSP:
1853                         dev_dbg(dev, "%s ========== Port %u CHECK_RSP Sequence = %02x =============\n",
1854                                 __func__, edge_serial->rxPort, byte3);
1855                         /* Port->RxCheckRsp = true; */
1856                         return;
1857                 }
1858         }
1859
1860         if (code == IOSP_STATUS_OPEN_RSP) {
1861                 edge_port->txCredits = GET_TX_BUFFER_SIZE(byte3);
1862                 edge_port->maxTxCredits = edge_port->txCredits;
1863                 dev_dbg(dev, "%s - Port %u Open Response Initial MSR = %02x TxBufferSize = %d\n",
1864                         __func__, edge_serial->rxPort, byte2, edge_port->txCredits);
1865                 handle_new_msr(edge_port, byte2);
1866
1867                 /* send the current line settings to the port so we are
1868                    in sync with any further termios calls */
1869                 tty = tty_port_tty_get(&edge_port->port->port);
1870                 if (tty) {
1871                         change_port_settings(tty,
1872                                 edge_port, &tty->termios);
1873                         tty_kref_put(tty);
1874                 }
1875
1876                 /* we have completed the open */
1877                 edge_port->openPending = false;
1878                 edge_port->open = true;
1879                 wake_up(&edge_port->wait_open);
1880                 return;
1881         }
1882
1883         /* If port is closed, silently discard all rcvd status. We can
1884          * have cases where buffered status is received AFTER the close
1885          * port command is sent to the Edgeport.
1886          */
1887         if (!edge_port->open || edge_port->closePending)
1888                 return;
1889
1890         switch (code) {
1891         /* Not currently sent by Edgeport */
1892         case IOSP_STATUS_LSR:
1893                 dev_dbg(dev, "%s - Port %u LSR Status = %02x\n",
1894                         __func__, edge_serial->rxPort, byte2);
1895                 handle_new_lsr(edge_port, false, byte2, 0);
1896                 break;
1897
1898         case IOSP_STATUS_LSR_DATA:
1899                 dev_dbg(dev, "%s - Port %u LSR Status = %02x, Data = %02x\n",
1900                         __func__, edge_serial->rxPort, byte2, byte3);
1901                 /* byte2 is LSR Register */
1902                 /* byte3 is broken data byte */
1903                 handle_new_lsr(edge_port, true, byte2, byte3);
1904                 break;
1905         /*
1906          *      case IOSP_EXT_4_STATUS:
1907          *              dev_dbg(dev, "%s - Port %u LSR Status = %02x Data = %02x\n",
1908          *                      __func__, edge_serial->rxPort, byte2, byte3);
1909          *              break;
1910          */
1911         case IOSP_STATUS_MSR:
1912                 dev_dbg(dev, "%s - Port %u MSR Status = %02x\n",
1913                         __func__, edge_serial->rxPort, byte2);
1914                 /*
1915                  * Process this new modem status and generate appropriate
1916                  * events, etc, based on the new status. This routine
1917                  * also saves the MSR in Port->ShadowMsr.
1918                  */
1919                 handle_new_msr(edge_port, byte2);
1920                 break;
1921
1922         default:
1923                 dev_dbg(dev, "%s - Unrecognized IOSP status code %u\n", __func__, code);
1924                 break;
1925         }
1926 }
1927
1928
1929 /*****************************************************************************
1930  * edge_tty_recv
1931  *      this function passes data on to the tty flip buffer
1932  *****************************************************************************/
1933 static void edge_tty_recv(struct usb_serial_port *port, unsigned char *data,
1934                 int length)
1935 {
1936         int cnt;
1937
1938         cnt = tty_insert_flip_string(&port->port, data, length);
1939         if (cnt < length) {
1940                 dev_err(&port->dev, "%s - dropping data, %d bytes lost\n",
1941                                 __func__, length - cnt);
1942         }
1943         data += cnt;
1944         length -= cnt;
1945
1946         tty_flip_buffer_push(&port->port);
1947 }
1948
1949
1950 /*****************************************************************************
1951  * handle_new_msr
1952  *      this function handles any change to the msr register for a port.
1953  *****************************************************************************/
1954 static void handle_new_msr(struct edgeport_port *edge_port, __u8 newMsr)
1955 {
1956         struct  async_icount *icount;
1957
1958         if (newMsr & (EDGEPORT_MSR_DELTA_CTS | EDGEPORT_MSR_DELTA_DSR |
1959                         EDGEPORT_MSR_DELTA_RI | EDGEPORT_MSR_DELTA_CD)) {
1960                 icount = &edge_port->port->icount;
1961
1962                 /* update input line counters */
1963                 if (newMsr & EDGEPORT_MSR_DELTA_CTS)
1964                         icount->cts++;
1965                 if (newMsr & EDGEPORT_MSR_DELTA_DSR)
1966                         icount->dsr++;
1967                 if (newMsr & EDGEPORT_MSR_DELTA_CD)
1968                         icount->dcd++;
1969                 if (newMsr & EDGEPORT_MSR_DELTA_RI)
1970                         icount->rng++;
1971                 wake_up_interruptible(&edge_port->port->port.delta_msr_wait);
1972         }
1973
1974         /* Save the new modem status */
1975         edge_port->shadowMSR = newMsr & 0xf0;
1976 }
1977
1978
1979 /*****************************************************************************
1980  * handle_new_lsr
1981  *      this function handles any change to the lsr register for a port.
1982  *****************************************************************************/
1983 static void handle_new_lsr(struct edgeport_port *edge_port, __u8 lsrData,
1984                                                         __u8 lsr, __u8 data)
1985 {
1986         __u8 newLsr = (__u8) (lsr & (__u8)
1987                 (LSR_OVER_ERR | LSR_PAR_ERR | LSR_FRM_ERR | LSR_BREAK));
1988         struct async_icount *icount;
1989
1990         edge_port->shadowLSR = lsr;
1991
1992         if (newLsr & LSR_BREAK) {
1993                 /*
1994                  * Parity and Framing errors only count if they
1995                  * occur exclusive of a break being
1996                  * received.
1997                  */
1998                 newLsr &= (__u8)(LSR_OVER_ERR | LSR_BREAK);
1999         }
2000
2001         /* Place LSR data byte into Rx buffer */
2002         if (lsrData)
2003                 edge_tty_recv(edge_port->port, &data, 1);
2004
2005         /* update input line counters */
2006         icount = &edge_port->port->icount;
2007         if (newLsr & LSR_BREAK)
2008                 icount->brk++;
2009         if (newLsr & LSR_OVER_ERR)
2010                 icount->overrun++;
2011         if (newLsr & LSR_PAR_ERR)
2012                 icount->parity++;
2013         if (newLsr & LSR_FRM_ERR)
2014                 icount->frame++;
2015 }
2016
2017
2018 /****************************************************************************
2019  * sram_write
2020  *      writes a number of bytes to the Edgeport device's sram starting at the
2021  *      given address.
2022  *      If successful returns the number of bytes written, otherwise it returns
2023  *      a negative error number of the problem.
2024  ****************************************************************************/
2025 static int sram_write(struct usb_serial *serial, __u16 extAddr, __u16 addr,
2026                                         __u16 length, const __u8 *data)
2027 {
2028         int result;
2029         __u16 current_length;
2030         unsigned char *transfer_buffer;
2031
2032         dev_dbg(&serial->dev->dev, "%s - %x, %x, %d\n", __func__, extAddr, addr, length);
2033
2034         transfer_buffer =  kmalloc(64, GFP_KERNEL);
2035         if (!transfer_buffer)
2036                 return -ENOMEM;
2037
2038         /* need to split these writes up into 64 byte chunks */
2039         result = 0;
2040         while (length > 0) {
2041                 if (length > 64)
2042                         current_length = 64;
2043                 else
2044                         current_length = length;
2045
2046 /*              dev_dbg(&serial->dev->dev, "%s - writing %x, %x, %d\n", __func__, extAddr, addr, current_length); */
2047                 memcpy(transfer_buffer, data, current_length);
2048                 result = usb_control_msg(serial->dev,
2049                                         usb_sndctrlpipe(serial->dev, 0),
2050                                         USB_REQUEST_ION_WRITE_RAM,
2051                                         0x40, addr, extAddr, transfer_buffer,
2052                                         current_length, 300);
2053                 if (result < 0)
2054                         break;
2055                 length -= current_length;
2056                 addr += current_length;
2057                 data += current_length;
2058         }
2059
2060         kfree(transfer_buffer);
2061         return result;
2062 }
2063
2064
2065 /****************************************************************************
2066  * rom_write
2067  *      writes a number of bytes to the Edgeport device's ROM starting at the
2068  *      given address.
2069  *      If successful returns the number of bytes written, otherwise it returns
2070  *      a negative error number of the problem.
2071  ****************************************************************************/
2072 static int rom_write(struct usb_serial *serial, __u16 extAddr, __u16 addr,
2073                                         __u16 length, const __u8 *data)
2074 {
2075         int result;
2076         __u16 current_length;
2077         unsigned char *transfer_buffer;
2078
2079         transfer_buffer =  kmalloc(64, GFP_KERNEL);
2080         if (!transfer_buffer)
2081                 return -ENOMEM;
2082
2083         /* need to split these writes up into 64 byte chunks */
2084         result = 0;
2085         while (length > 0) {
2086                 if (length > 64)
2087                         current_length = 64;
2088                 else
2089                         current_length = length;
2090                 memcpy(transfer_buffer, data, current_length);
2091                 result = usb_control_msg(serial->dev,
2092                                         usb_sndctrlpipe(serial->dev, 0),
2093                                         USB_REQUEST_ION_WRITE_ROM, 0x40,
2094                                         addr, extAddr,
2095                                         transfer_buffer, current_length, 300);
2096                 if (result < 0)
2097                         break;
2098                 length -= current_length;
2099                 addr += current_length;
2100                 data += current_length;
2101         }
2102
2103         kfree(transfer_buffer);
2104         return result;
2105 }
2106
2107
2108 /****************************************************************************
2109  * rom_read
2110  *      reads a number of bytes from the Edgeport device starting at the given
2111  *      address.
2112  *      Returns zero on success or a negative error number.
2113  ****************************************************************************/
2114 static int rom_read(struct usb_serial *serial, __u16 extAddr,
2115                                         __u16 addr, __u16 length, __u8 *data)
2116 {
2117         int result;
2118         __u16 current_length;
2119         unsigned char *transfer_buffer;
2120
2121         transfer_buffer =  kmalloc(64, GFP_KERNEL);
2122         if (!transfer_buffer)
2123                 return -ENOMEM;
2124
2125         /* need to split these reads up into 64 byte chunks */
2126         result = 0;
2127         while (length > 0) {
2128                 if (length > 64)
2129                         current_length = 64;
2130                 else
2131                         current_length = length;
2132                 result = usb_control_msg(serial->dev,
2133                                         usb_rcvctrlpipe(serial->dev, 0),
2134                                         USB_REQUEST_ION_READ_ROM,
2135                                         0xC0, addr, extAddr, transfer_buffer,
2136                                         current_length, 300);
2137                 if (result < current_length) {
2138                         if (result >= 0)
2139                                 result = -EIO;
2140                         break;
2141                 }
2142                 memcpy(data, transfer_buffer, current_length);
2143                 length -= current_length;
2144                 addr += current_length;
2145                 data += current_length;
2146
2147                 result = 0;
2148         }
2149
2150         kfree(transfer_buffer);
2151         return result;
2152 }
2153
2154
2155 /****************************************************************************
2156  * send_iosp_ext_cmd
2157  *      Is used to send a IOSP message to the Edgeport device
2158  ****************************************************************************/
2159 static int send_iosp_ext_cmd(struct edgeport_port *edge_port,
2160                                                 __u8 command, __u8 param)
2161 {
2162         unsigned char   *buffer;
2163         unsigned char   *currentCommand;
2164         int             length = 0;
2165         int             status = 0;
2166
2167         buffer = kmalloc(10, GFP_ATOMIC);
2168         if (!buffer)
2169                 return -ENOMEM;
2170
2171         currentCommand = buffer;
2172
2173         MAKE_CMD_EXT_CMD(&currentCommand, &length, edge_port->port->port_number,
2174                          command, param);
2175
2176         status = write_cmd_usb(edge_port, buffer, length);
2177         if (status) {
2178                 /* something bad happened, let's free up the memory */
2179                 kfree(buffer);
2180         }
2181
2182         return status;
2183 }
2184
2185
2186 /*****************************************************************************
2187  * write_cmd_usb
2188  *      this function writes the given buffer out to the bulk write endpoint.
2189  *****************************************************************************/
2190 static int write_cmd_usb(struct edgeport_port *edge_port,
2191                                         unsigned char *buffer, int length)
2192 {
2193         struct edgeport_serial *edge_serial =
2194                                 usb_get_serial_data(edge_port->port->serial);
2195         struct device *dev = &edge_port->port->dev;
2196         int status = 0;
2197         struct urb *urb;
2198
2199         usb_serial_debug_data(dev, __func__, length, buffer);
2200
2201         /* Allocate our next urb */
2202         urb = usb_alloc_urb(0, GFP_ATOMIC);
2203         if (!urb)
2204                 return -ENOMEM;
2205
2206         atomic_inc(&CmdUrbs);
2207         dev_dbg(dev, "%s - ALLOCATE URB %p (outstanding %d)\n",
2208                 __func__, urb, atomic_read(&CmdUrbs));
2209
2210         usb_fill_bulk_urb(urb, edge_serial->serial->dev,
2211                         usb_sndbulkpipe(edge_serial->serial->dev,
2212                                         edge_serial->bulk_out_endpoint),
2213                         buffer, length, edge_bulk_out_cmd_callback, edge_port);
2214
2215         edge_port->commandPending = true;
2216         status = usb_submit_urb(urb, GFP_ATOMIC);
2217
2218         if (status) {
2219                 /* something went wrong */
2220                 dev_err(dev, "%s - usb_submit_urb(write command) failed, status = %d\n",
2221                         __func__, status);
2222                 usb_free_urb(urb);
2223                 atomic_dec(&CmdUrbs);
2224                 return status;
2225         }
2226
2227 #if 0
2228         wait_event(&edge_port->wait_command, !edge_port->commandPending);
2229
2230         if (edge_port->commandPending) {
2231                 /* command timed out */
2232                 dev_dbg(dev, "%s - command timed out\n", __func__);
2233                 status = -EINVAL;
2234         }
2235 #endif
2236         return status;
2237 }
2238
2239
2240 /*****************************************************************************
2241  * send_cmd_write_baud_rate
2242  *      this function sends the proper command to change the baud rate of the
2243  *      specified port.
2244  *****************************************************************************/
2245 static int send_cmd_write_baud_rate(struct edgeport_port *edge_port,
2246                                                                 int baudRate)
2247 {
2248         struct edgeport_serial *edge_serial =
2249                                 usb_get_serial_data(edge_port->port->serial);
2250         struct device *dev = &edge_port->port->dev;
2251         unsigned char *cmdBuffer;
2252         unsigned char *currCmd;
2253         int cmdLen = 0;
2254         int divisor;
2255         int status;
2256         u32 number = edge_port->port->port_number;
2257
2258         if (edge_serial->is_epic &&
2259             !edge_serial->epic_descriptor.Supports.IOSPSetBaudRate) {
2260                 dev_dbg(dev, "SendCmdWriteBaudRate - NOT Setting baud rate for port, baud = %d\n",
2261                         baudRate);
2262                 return 0;
2263         }
2264
2265         dev_dbg(dev, "%s - baud = %d\n", __func__, baudRate);
2266
2267         status = calc_baud_rate_divisor(dev, baudRate, &divisor);
2268         if (status) {
2269                 dev_err(dev, "%s - bad baud rate\n", __func__);
2270                 return status;
2271         }
2272
2273         /* Alloc memory for the string of commands. */
2274         cmdBuffer =  kmalloc(0x100, GFP_ATOMIC);
2275         if (!cmdBuffer)
2276                 return -ENOMEM;
2277
2278         currCmd = cmdBuffer;
2279
2280         /* Enable access to divisor latch */
2281         MAKE_CMD_WRITE_REG(&currCmd, &cmdLen, number, LCR, LCR_DL_ENABLE);
2282
2283         /* Write the divisor itself */
2284         MAKE_CMD_WRITE_REG(&currCmd, &cmdLen, number, DLL, LOW8(divisor));
2285         MAKE_CMD_WRITE_REG(&currCmd, &cmdLen, number, DLM, HIGH8(divisor));
2286
2287         /* Restore original value to disable access to divisor latch */
2288         MAKE_CMD_WRITE_REG(&currCmd, &cmdLen, number, LCR,
2289                                                 edge_port->shadowLCR);
2290
2291         status = write_cmd_usb(edge_port, cmdBuffer, cmdLen);
2292         if (status) {
2293                 /* something bad happened, let's free up the memory */
2294                 kfree(cmdBuffer);
2295         }
2296
2297         return status;
2298 }
2299
2300
2301 /*****************************************************************************
2302  * calc_baud_rate_divisor
2303  *      this function calculates the proper baud rate divisor for the specified
2304  *      baud rate.
2305  *****************************************************************************/
2306 static int calc_baud_rate_divisor(struct device *dev, int baudrate, int *divisor)
2307 {
2308         int i;
2309         __u16 custom;
2310
2311         for (i = 0; i < ARRAY_SIZE(divisor_table); i++) {
2312                 if (divisor_table[i].BaudRate == baudrate) {
2313                         *divisor = divisor_table[i].Divisor;
2314                         return 0;
2315                 }
2316         }
2317
2318         /* We have tried all of the standard baud rates
2319          * lets try to calculate the divisor for this baud rate
2320          * Make sure the baud rate is reasonable */
2321         if (baudrate > 50 && baudrate < 230400) {
2322                 /* get divisor */
2323                 custom = (__u16)((230400L + baudrate/2) / baudrate);
2324
2325                 *divisor = custom;
2326
2327                 dev_dbg(dev, "%s - Baud %d = %d\n", __func__, baudrate, custom);
2328                 return 0;
2329         }
2330
2331         return -1;
2332 }
2333
2334
2335 /*****************************************************************************
2336  * send_cmd_write_uart_register
2337  *  this function builds up a uart register message and sends to the device.
2338  *****************************************************************************/
2339 static int send_cmd_write_uart_register(struct edgeport_port *edge_port,
2340                                                 __u8 regNum, __u8 regValue)
2341 {
2342         struct edgeport_serial *edge_serial =
2343                                 usb_get_serial_data(edge_port->port->serial);
2344         struct device *dev = &edge_port->port->dev;
2345         unsigned char *cmdBuffer;
2346         unsigned char *currCmd;
2347         unsigned long cmdLen = 0;
2348         int status;
2349
2350         dev_dbg(dev, "%s - write to %s register 0x%02x\n",
2351                 (regNum == MCR) ? "MCR" : "LCR", __func__, regValue);
2352
2353         if (edge_serial->is_epic &&
2354             !edge_serial->epic_descriptor.Supports.IOSPWriteMCR &&
2355             regNum == MCR) {
2356                 dev_dbg(dev, "SendCmdWriteUartReg - Not writing to MCR Register\n");
2357                 return 0;
2358         }
2359
2360         if (edge_serial->is_epic &&
2361             !edge_serial->epic_descriptor.Supports.IOSPWriteLCR &&
2362             regNum == LCR) {
2363                 dev_dbg(dev, "SendCmdWriteUartReg - Not writing to LCR Register\n");
2364                 return 0;
2365         }
2366
2367         /* Alloc memory for the string of commands. */
2368         cmdBuffer = kmalloc(0x10, GFP_ATOMIC);
2369         if (cmdBuffer == NULL)
2370                 return -ENOMEM;
2371
2372         currCmd = cmdBuffer;
2373
2374         /* Build a cmd in the buffer to write the given register */
2375         MAKE_CMD_WRITE_REG(&currCmd, &cmdLen, edge_port->port->port_number,
2376                            regNum, regValue);
2377
2378         status = write_cmd_usb(edge_port, cmdBuffer, cmdLen);
2379         if (status) {
2380                 /* something bad happened, let's free up the memory */
2381                 kfree(cmdBuffer);
2382         }
2383
2384         return status;
2385 }
2386
2387
2388 /*****************************************************************************
2389  * change_port_settings
2390  *      This routine is called to set the UART on the device to match the
2391  *      specified new settings.
2392  *****************************************************************************/
2393
2394 static void change_port_settings(struct tty_struct *tty,
2395         struct edgeport_port *edge_port, struct ktermios *old_termios)
2396 {
2397         struct device *dev = &edge_port->port->dev;
2398         struct edgeport_serial *edge_serial =
2399                         usb_get_serial_data(edge_port->port->serial);
2400         int baud;
2401         unsigned cflag;
2402         __u8 mask = 0xff;
2403         __u8 lData;
2404         __u8 lParity;
2405         __u8 lStop;
2406         __u8 rxFlow;
2407         __u8 txFlow;
2408         int status;
2409
2410         if (!edge_port->open &&
2411             !edge_port->openPending) {
2412                 dev_dbg(dev, "%s - port not opened\n", __func__);
2413                 return;
2414         }
2415
2416         cflag = tty->termios.c_cflag;
2417
2418         switch (cflag & CSIZE) {
2419         case CS5:
2420                 lData = LCR_BITS_5; mask = 0x1f;
2421                 dev_dbg(dev, "%s - data bits = 5\n", __func__);
2422                 break;
2423         case CS6:
2424                 lData = LCR_BITS_6; mask = 0x3f;
2425                 dev_dbg(dev, "%s - data bits = 6\n", __func__);
2426                 break;
2427         case CS7:
2428                 lData = LCR_BITS_7; mask = 0x7f;
2429                 dev_dbg(dev, "%s - data bits = 7\n", __func__);
2430                 break;
2431         default:
2432         case CS8:
2433                 lData = LCR_BITS_8;
2434                 dev_dbg(dev, "%s - data bits = 8\n", __func__);
2435                 break;
2436         }
2437
2438         lParity = LCR_PAR_NONE;
2439         if (cflag & PARENB) {
2440                 if (cflag & CMSPAR) {
2441                         if (cflag & PARODD) {
2442                                 lParity = LCR_PAR_MARK;
2443                                 dev_dbg(dev, "%s - parity = mark\n", __func__);
2444                         } else {
2445                                 lParity = LCR_PAR_SPACE;
2446                                 dev_dbg(dev, "%s - parity = space\n", __func__);
2447                         }
2448                 } else if (cflag & PARODD) {
2449                         lParity = LCR_PAR_ODD;
2450                         dev_dbg(dev, "%s - parity = odd\n", __func__);
2451                 } else {
2452                         lParity = LCR_PAR_EVEN;
2453                         dev_dbg(dev, "%s - parity = even\n", __func__);
2454                 }
2455         } else {
2456                 dev_dbg(dev, "%s - parity = none\n", __func__);
2457         }
2458
2459         if (cflag & CSTOPB) {
2460                 lStop = LCR_STOP_2;
2461                 dev_dbg(dev, "%s - stop bits = 2\n", __func__);
2462         } else {
2463                 lStop = LCR_STOP_1;
2464                 dev_dbg(dev, "%s - stop bits = 1\n", __func__);
2465         }
2466
2467         /* figure out the flow control settings */
2468         rxFlow = txFlow = 0x00;
2469         if (cflag & CRTSCTS) {
2470                 rxFlow |= IOSP_RX_FLOW_RTS;
2471                 txFlow |= IOSP_TX_FLOW_CTS;
2472                 dev_dbg(dev, "%s - RTS/CTS is enabled\n", __func__);
2473         } else {
2474                 dev_dbg(dev, "%s - RTS/CTS is disabled\n", __func__);
2475         }
2476
2477         /* if we are implementing XON/XOFF, set the start and stop character
2478            in the device */
2479         if (I_IXOFF(tty) || I_IXON(tty)) {
2480                 unsigned char stop_char  = STOP_CHAR(tty);
2481                 unsigned char start_char = START_CHAR(tty);
2482
2483                 if ((!edge_serial->is_epic) ||
2484                     ((edge_serial->is_epic) &&
2485                      (edge_serial->epic_descriptor.Supports.IOSPSetXChar))) {
2486                         send_iosp_ext_cmd(edge_port,
2487                                         IOSP_CMD_SET_XON_CHAR, start_char);
2488                         send_iosp_ext_cmd(edge_port,
2489                                         IOSP_CMD_SET_XOFF_CHAR, stop_char);
2490                 }
2491
2492                 /* if we are implementing INBOUND XON/XOFF */
2493                 if (I_IXOFF(tty)) {
2494                         rxFlow |= IOSP_RX_FLOW_XON_XOFF;
2495                         dev_dbg(dev, "%s - INBOUND XON/XOFF is enabled, XON = %2x, XOFF = %2x\n",
2496                                 __func__, start_char, stop_char);
2497                 } else {
2498                         dev_dbg(dev, "%s - INBOUND XON/XOFF is disabled\n", __func__);
2499                 }
2500
2501                 /* if we are implementing OUTBOUND XON/XOFF */
2502                 if (I_IXON(tty)) {
2503                         txFlow |= IOSP_TX_FLOW_XON_XOFF;
2504                         dev_dbg(dev, "%s - OUTBOUND XON/XOFF is enabled, XON = %2x, XOFF = %2x\n",
2505                                 __func__, start_char, stop_char);
2506                 } else {
2507                         dev_dbg(dev, "%s - OUTBOUND XON/XOFF is disabled\n", __func__);
2508                 }
2509         }
2510
2511         /* Set flow control to the configured value */
2512         if ((!edge_serial->is_epic) ||
2513             ((edge_serial->is_epic) &&
2514              (edge_serial->epic_descriptor.Supports.IOSPSetRxFlow)))
2515                 send_iosp_ext_cmd(edge_port, IOSP_CMD_SET_RX_FLOW, rxFlow);
2516         if ((!edge_serial->is_epic) ||
2517             ((edge_serial->is_epic) &&
2518              (edge_serial->epic_descriptor.Supports.IOSPSetTxFlow)))
2519                 send_iosp_ext_cmd(edge_port, IOSP_CMD_SET_TX_FLOW, txFlow);
2520
2521
2522         edge_port->shadowLCR &= ~(LCR_BITS_MASK | LCR_STOP_MASK | LCR_PAR_MASK);
2523         edge_port->shadowLCR |= (lData | lParity | lStop);
2524
2525         edge_port->validDataMask = mask;
2526
2527         /* Send the updated LCR value to the EdgePort */
2528         status = send_cmd_write_uart_register(edge_port, LCR,
2529                                                         edge_port->shadowLCR);
2530         if (status != 0)
2531                 return;
2532
2533         /* set up the MCR register and send it to the EdgePort */
2534         edge_port->shadowMCR = MCR_MASTER_IE;
2535         if (cflag & CBAUD)
2536                 edge_port->shadowMCR |= (MCR_DTR | MCR_RTS);
2537
2538         status = send_cmd_write_uart_register(edge_port, MCR,
2539                                                 edge_port->shadowMCR);
2540         if (status != 0)
2541                 return;
2542
2543         /* Determine divisor based on baud rate */
2544         baud = tty_get_baud_rate(tty);
2545         if (!baud) {
2546                 /* pick a default, any default... */
2547                 baud = 9600;
2548         }
2549
2550         dev_dbg(dev, "%s - baud rate = %d\n", __func__, baud);
2551         status = send_cmd_write_baud_rate(edge_port, baud);
2552         if (status == -1) {
2553                 /* Speed change was not possible - put back the old speed */
2554                 baud = tty_termios_baud_rate(old_termios);
2555                 tty_encode_baud_rate(tty, baud, baud);
2556         }
2557 }
2558
2559
2560 /****************************************************************************
2561  * unicode_to_ascii
2562  *      Turns a string from Unicode into ASCII.
2563  *      Doesn't do a good job with any characters that are outside the normal
2564  *      ASCII range, but it's only for debugging...
2565  *      NOTE: expects the unicode in LE format
2566  ****************************************************************************/
2567 static void unicode_to_ascii(char *string, int buflen,
2568                                         __le16 *unicode, int unicode_size)
2569 {
2570         int i;
2571
2572         if (buflen <= 0)        /* never happens, but... */
2573                 return;
2574         --buflen;               /* space for nul */
2575
2576         for (i = 0; i < unicode_size; i++) {
2577                 if (i >= buflen)
2578                         break;
2579                 string[i] = (char)(le16_to_cpu(unicode[i]));
2580         }
2581         string[i] = 0x00;
2582 }
2583
2584
2585 /****************************************************************************
2586  * get_manufacturing_desc
2587  *      reads in the manufacturing descriptor and stores it into the serial
2588  *      structure.
2589  ****************************************************************************/
2590 static void get_manufacturing_desc(struct edgeport_serial *edge_serial)
2591 {
2592         struct device *dev = &edge_serial->serial->dev->dev;
2593         int response;
2594
2595         dev_dbg(dev, "getting manufacturer descriptor\n");
2596
2597         response = rom_read(edge_serial->serial,
2598                                 (EDGE_MANUF_DESC_ADDR & 0xffff0000) >> 16,
2599                                 (__u16)(EDGE_MANUF_DESC_ADDR & 0x0000ffff),
2600                                 EDGE_MANUF_DESC_LEN,
2601                                 (__u8 *)(&edge_serial->manuf_descriptor));
2602
2603         if (response < 0) {
2604                 dev_err(dev, "error in getting manufacturer descriptor: %d\n",
2605                                 response);
2606         } else {
2607                 char string[30];
2608                 dev_dbg(dev, "**Manufacturer Descriptor\n");
2609                 dev_dbg(dev, "  RomSize:        %dK\n",
2610                         edge_serial->manuf_descriptor.RomSize);
2611                 dev_dbg(dev, "  RamSize:        %dK\n",
2612                         edge_serial->manuf_descriptor.RamSize);
2613                 dev_dbg(dev, "  CpuRev:         %d\n",
2614                         edge_serial->manuf_descriptor.CpuRev);
2615                 dev_dbg(dev, "  BoardRev:       %d\n",
2616                         edge_serial->manuf_descriptor.BoardRev);
2617                 dev_dbg(dev, "  NumPorts:       %d\n",
2618                         edge_serial->manuf_descriptor.NumPorts);
2619                 dev_dbg(dev, "  DescDate:       %d/%d/%d\n",
2620                         edge_serial->manuf_descriptor.DescDate[0],
2621                         edge_serial->manuf_descriptor.DescDate[1],
2622                         edge_serial->manuf_descriptor.DescDate[2]+1900);
2623                 unicode_to_ascii(string, sizeof(string),
2624                         edge_serial->manuf_descriptor.SerialNumber,
2625                         edge_serial->manuf_descriptor.SerNumLength/2);
2626                 dev_dbg(dev, "  SerialNumber: %s\n", string);
2627                 unicode_to_ascii(string, sizeof(string),
2628                         edge_serial->manuf_descriptor.AssemblyNumber,
2629                         edge_serial->manuf_descriptor.AssemblyNumLength/2);
2630                 dev_dbg(dev, "  AssemblyNumber: %s\n", string);
2631                 unicode_to_ascii(string, sizeof(string),
2632                     edge_serial->manuf_descriptor.OemAssyNumber,
2633                     edge_serial->manuf_descriptor.OemAssyNumLength/2);
2634                 dev_dbg(dev, "  OemAssyNumber:  %s\n", string);
2635                 dev_dbg(dev, "  UartType:       %d\n",
2636                         edge_serial->manuf_descriptor.UartType);
2637                 dev_dbg(dev, "  IonPid:         %d\n",
2638                         edge_serial->manuf_descriptor.IonPid);
2639                 dev_dbg(dev, "  IonConfig:      %d\n",
2640                         edge_serial->manuf_descriptor.IonConfig);
2641         }
2642 }
2643
2644
2645 /****************************************************************************
2646  * get_boot_desc
2647  *      reads in the bootloader descriptor and stores it into the serial
2648  *      structure.
2649  ****************************************************************************/
2650 static void get_boot_desc(struct edgeport_serial *edge_serial)
2651 {
2652         struct device *dev = &edge_serial->serial->dev->dev;
2653         int response;
2654
2655         dev_dbg(dev, "getting boot descriptor\n");
2656
2657         response = rom_read(edge_serial->serial,
2658                                 (EDGE_BOOT_DESC_ADDR & 0xffff0000) >> 16,
2659                                 (__u16)(EDGE_BOOT_DESC_ADDR & 0x0000ffff),
2660                                 EDGE_BOOT_DESC_LEN,
2661                                 (__u8 *)(&edge_serial->boot_descriptor));
2662
2663         if (response < 0) {
2664                 dev_err(dev, "error in getting boot descriptor: %d\n",
2665                                 response);
2666         } else {
2667                 dev_dbg(dev, "**Boot Descriptor:\n");
2668                 dev_dbg(dev, "  BootCodeLength: %d\n",
2669                         le16_to_cpu(edge_serial->boot_descriptor.BootCodeLength));
2670                 dev_dbg(dev, "  MajorVersion:   %d\n",
2671                         edge_serial->boot_descriptor.MajorVersion);
2672                 dev_dbg(dev, "  MinorVersion:   %d\n",
2673                         edge_serial->boot_descriptor.MinorVersion);
2674                 dev_dbg(dev, "  BuildNumber:    %d\n",
2675                         le16_to_cpu(edge_serial->boot_descriptor.BuildNumber));
2676                 dev_dbg(dev, "  Capabilities:   0x%x\n",
2677                       le16_to_cpu(edge_serial->boot_descriptor.Capabilities));
2678                 dev_dbg(dev, "  UConfig0:       %d\n",
2679                         edge_serial->boot_descriptor.UConfig0);
2680                 dev_dbg(dev, "  UConfig1:       %d\n",
2681                         edge_serial->boot_descriptor.UConfig1);
2682         }
2683 }
2684
2685
2686 /****************************************************************************
2687  * load_application_firmware
2688  *      This is called to load the application firmware to the device
2689  ****************************************************************************/
2690 static void load_application_firmware(struct edgeport_serial *edge_serial)
2691 {
2692         struct device *dev = &edge_serial->serial->dev->dev;
2693         const struct ihex_binrec *rec;
2694         const struct firmware *fw;
2695         const char *fw_name;
2696         const char *fw_info;
2697         int response;
2698         __u32 Operaddr;
2699         __u16 build;
2700
2701         switch (edge_serial->product_info.iDownloadFile) {
2702                 case EDGE_DOWNLOAD_FILE_I930:
2703                         fw_info = "downloading firmware version (930)";
2704                         fw_name = "edgeport/down.fw";
2705                         break;
2706
2707                 case EDGE_DOWNLOAD_FILE_80251:
2708                         fw_info = "downloading firmware version (80251)";
2709                         fw_name = "edgeport/down2.fw";
2710                         break;
2711
2712                 case EDGE_DOWNLOAD_FILE_NONE:
2713                         dev_dbg(dev, "No download file specified, skipping download\n");
2714                         return;
2715
2716                 default:
2717                         return;
2718         }
2719
2720         response = request_ihex_firmware(&fw, fw_name,
2721                                     &edge_serial->serial->dev->dev);
2722         if (response) {
2723                 dev_err(dev, "Failed to load image \"%s\" err %d\n",
2724                        fw_name, response);
2725                 return;
2726         }
2727
2728         rec = (const struct ihex_binrec *)fw->data;
2729         build = (rec->data[2] << 8) | rec->data[3];
2730
2731         dev_dbg(dev, "%s %d.%d.%d\n", fw_info, rec->data[0], rec->data[1], build);
2732
2733         edge_serial->product_info.FirmwareMajorVersion = rec->data[0];
2734         edge_serial->product_info.FirmwareMinorVersion = rec->data[1];
2735         edge_serial->product_info.FirmwareBuildNumber = cpu_to_le16(build);
2736
2737         for (rec = ihex_next_binrec(rec); rec;
2738              rec = ihex_next_binrec(rec)) {
2739                 Operaddr = be32_to_cpu(rec->addr);
2740                 response = sram_write(edge_serial->serial,
2741                                      Operaddr >> 16,
2742                                      Operaddr & 0xFFFF,
2743                                      be16_to_cpu(rec->len),
2744                                      &rec->data[0]);
2745                 if (response < 0) {
2746                         dev_err(&edge_serial->serial->dev->dev,
2747                                 "sram_write failed (%x, %x, %d)\n",
2748                                 Operaddr >> 16, Operaddr & 0xFFFF,
2749                                 be16_to_cpu(rec->len));
2750                         break;
2751                 }
2752         }
2753
2754         dev_dbg(dev, "sending exec_dl_code\n");
2755         response = usb_control_msg (edge_serial->serial->dev,
2756                                     usb_sndctrlpipe(edge_serial->serial->dev, 0),
2757                                     USB_REQUEST_ION_EXEC_DL_CODE,
2758                                     0x40, 0x4000, 0x0001, NULL, 0, 3000);
2759
2760         release_firmware(fw);
2761 }
2762
2763
2764 /****************************************************************************
2765  * edge_startup
2766  ****************************************************************************/
2767 static int edge_startup(struct usb_serial *serial)
2768 {
2769         struct edgeport_serial *edge_serial;
2770         struct usb_device *dev;
2771         struct device *ddev = &serial->dev->dev;
2772         int i;
2773         int response;
2774         bool interrupt_in_found;
2775         bool bulk_in_found;
2776         bool bulk_out_found;
2777         static __u32 descriptor[3] = {  EDGE_COMPATIBILITY_MASK0,
2778                                         EDGE_COMPATIBILITY_MASK1,
2779                                         EDGE_COMPATIBILITY_MASK2 };
2780
2781         if (serial->num_bulk_in < 1 || serial->num_interrupt_in < 1) {
2782                 dev_err(&serial->interface->dev, "missing endpoints\n");
2783                 return -ENODEV;
2784         }
2785
2786         dev = serial->dev;
2787
2788         /* create our private serial structure */
2789         edge_serial = kzalloc(sizeof(struct edgeport_serial), GFP_KERNEL);
2790         if (!edge_serial)
2791                 return -ENOMEM;
2792
2793         spin_lock_init(&edge_serial->es_lock);
2794         edge_serial->serial = serial;
2795         usb_set_serial_data(serial, edge_serial);
2796
2797         /* get the name for the device from the device */
2798         i = usb_string(dev, dev->descriptor.iManufacturer,
2799             &edge_serial->name[0], MAX_NAME_LEN+1);
2800         if (i < 0)
2801                 i = 0;
2802         edge_serial->name[i++] = ' ';
2803         usb_string(dev, dev->descriptor.iProduct,
2804             &edge_serial->name[i], MAX_NAME_LEN+2 - i);
2805
2806         dev_info(&serial->dev->dev, "%s detected\n", edge_serial->name);
2807
2808         /* Read the epic descriptor */
2809         if (get_epic_descriptor(edge_serial) < 0) {
2810                 /* memcpy descriptor to Supports structures */
2811                 memcpy(&edge_serial->epic_descriptor.Supports, descriptor,
2812                        sizeof(struct edge_compatibility_bits));
2813
2814                 /* get the manufacturing descriptor for this device */
2815                 get_manufacturing_desc(edge_serial);
2816
2817                 /* get the boot descriptor */
2818                 get_boot_desc(edge_serial);
2819
2820                 get_product_info(edge_serial);
2821         }
2822
2823         /* set the number of ports from the manufacturing description */
2824         /* serial->num_ports = serial->product_info.NumPorts; */
2825         if ((!edge_serial->is_epic) &&
2826             (edge_serial->product_info.NumPorts != serial->num_ports)) {
2827                 dev_warn(ddev,
2828                         "Device Reported %d serial ports vs. core thinking we have %d ports, email greg@kroah.com this information.\n",
2829                          edge_serial->product_info.NumPorts,
2830                          serial->num_ports);
2831         }
2832
2833         dev_dbg(ddev, "%s - time 1 %ld\n", __func__, jiffies);
2834
2835         /* If not an EPiC device */
2836         if (!edge_serial->is_epic) {
2837                 /* now load the application firmware into this device */
2838                 load_application_firmware(edge_serial);
2839
2840                 dev_dbg(ddev, "%s - time 2 %ld\n", __func__, jiffies);
2841
2842                 /* Check current Edgeport EEPROM and update if necessary */
2843                 update_edgeport_E2PROM(edge_serial);
2844
2845                 dev_dbg(ddev, "%s - time 3 %ld\n", __func__, jiffies);
2846
2847                 /* set the configuration to use #1 */
2848 /*              dev_dbg(ddev, "set_configuration 1\n"); */
2849 /*              usb_set_configuration (dev, 1); */
2850         }
2851         dev_dbg(ddev, "  FirmwareMajorVersion  %d.%d.%d\n",
2852             edge_serial->product_info.FirmwareMajorVersion,
2853             edge_serial->product_info.FirmwareMinorVersion,
2854             le16_to_cpu(edge_serial->product_info.FirmwareBuildNumber));
2855
2856         /* we set up the pointers to the endpoints in the edge_open function,
2857          * as the structures aren't created yet. */
2858
2859         response = 0;
2860
2861         if (edge_serial->is_epic) {
2862                 struct usb_host_interface *alt;
2863
2864                 alt = serial->interface->cur_altsetting;
2865
2866                 /* EPIC thing, set up our interrupt polling now and our read
2867                  * urb, so that the device knows it really is connected. */
2868                 interrupt_in_found = bulk_in_found = bulk_out_found = false;
2869                 for (i = 0; i < alt->desc.bNumEndpoints; ++i) {
2870                         struct usb_endpoint_descriptor *endpoint;
2871                         int buffer_size;
2872
2873                         endpoint = &alt->endpoint[i].desc;
2874                         buffer_size = usb_endpoint_maxp(endpoint);
2875                         if (!interrupt_in_found &&
2876                             (usb_endpoint_is_int_in(endpoint))) {
2877                                 /* we found a interrupt in endpoint */
2878                                 dev_dbg(ddev, "found interrupt in\n");
2879
2880                                 /* not set up yet, so do it now */
2881                                 edge_serial->interrupt_read_urb =
2882                                                 usb_alloc_urb(0, GFP_KERNEL);
2883                                 if (!edge_serial->interrupt_read_urb) {
2884                                         response = -ENOMEM;
2885                                         break;
2886                                 }
2887
2888                                 edge_serial->interrupt_in_buffer =
2889                                         kmalloc(buffer_size, GFP_KERNEL);
2890                                 if (!edge_serial->interrupt_in_buffer) {
2891                                         response = -ENOMEM;
2892                                         break;
2893                                 }
2894                                 edge_serial->interrupt_in_endpoint =
2895                                                 endpoint->bEndpointAddress;
2896
2897                                 /* set up our interrupt urb */
2898                                 usb_fill_int_urb(
2899                                         edge_serial->interrupt_read_urb,
2900                                         dev,
2901                                         usb_rcvintpipe(dev,
2902                                                 endpoint->bEndpointAddress),
2903                                         edge_serial->interrupt_in_buffer,
2904                                         buffer_size,
2905                                         edge_interrupt_callback,
2906                                         edge_serial,
2907                                         endpoint->bInterval);
2908
2909                                 interrupt_in_found = true;
2910                         }
2911
2912                         if (!bulk_in_found &&
2913                                 (usb_endpoint_is_bulk_in(endpoint))) {
2914                                 /* we found a bulk in endpoint */
2915                                 dev_dbg(ddev, "found bulk in\n");
2916
2917                                 /* not set up yet, so do it now */
2918                                 edge_serial->read_urb =
2919                                                 usb_alloc_urb(0, GFP_KERNEL);
2920                                 if (!edge_serial->read_urb) {
2921                                         response = -ENOMEM;
2922                                         break;
2923                                 }
2924
2925                                 edge_serial->bulk_in_buffer =
2926                                         kmalloc(buffer_size, GFP_KERNEL);
2927                                 if (!edge_serial->bulk_in_buffer) {
2928                                         response = -ENOMEM;
2929                                         break;
2930                                 }
2931                                 edge_serial->bulk_in_endpoint =
2932                                                 endpoint->bEndpointAddress;
2933
2934                                 /* set up our bulk in urb */
2935                                 usb_fill_bulk_urb(edge_serial->read_urb, dev,
2936                                         usb_rcvbulkpipe(dev,
2937                                                 endpoint->bEndpointAddress),
2938                                         edge_serial->bulk_in_buffer,
2939                                         usb_endpoint_maxp(endpoint),
2940                                         edge_bulk_in_callback,
2941                                         edge_serial);
2942                                 bulk_in_found = true;
2943                         }
2944
2945                         if (!bulk_out_found &&
2946                             (usb_endpoint_is_bulk_out(endpoint))) {
2947                                 /* we found a bulk out endpoint */
2948                                 dev_dbg(ddev, "found bulk out\n");
2949                                 edge_serial->bulk_out_endpoint =
2950                                                 endpoint->bEndpointAddress;
2951                                 bulk_out_found = true;
2952                         }
2953                 }
2954
2955                 if (response || !interrupt_in_found || !bulk_in_found ||
2956                                                         !bulk_out_found) {
2957                         if (!response) {
2958                                 dev_err(ddev, "expected endpoints not found\n");
2959                                 response = -ENODEV;
2960                         }
2961
2962                         usb_free_urb(edge_serial->interrupt_read_urb);
2963                         kfree(edge_serial->interrupt_in_buffer);
2964
2965                         usb_free_urb(edge_serial->read_urb);
2966                         kfree(edge_serial->bulk_in_buffer);
2967
2968                         kfree(edge_serial);
2969
2970                         return response;
2971                 }
2972
2973                 /* start interrupt read for this edgeport this interrupt will
2974                  * continue as long as the edgeport is connected */
2975                 response = usb_submit_urb(edge_serial->interrupt_read_urb,
2976                                                                 GFP_KERNEL);
2977                 if (response)
2978                         dev_err(ddev, "%s - Error %d submitting control urb\n",
2979                                 __func__, response);
2980         }
2981         return response;
2982 }
2983
2984
2985 /****************************************************************************
2986  * edge_disconnect
2987  *      This function is called whenever the device is removed from the usb bus.
2988  ****************************************************************************/
2989 static void edge_disconnect(struct usb_serial *serial)
2990 {
2991         struct edgeport_serial *edge_serial = usb_get_serial_data(serial);
2992
2993         if (edge_serial->is_epic) {
2994                 usb_kill_urb(edge_serial->interrupt_read_urb);
2995                 usb_kill_urb(edge_serial->read_urb);
2996         }
2997 }
2998
2999
3000 /****************************************************************************
3001  * edge_release
3002  *      This function is called when the device structure is deallocated.
3003  ****************************************************************************/
3004 static void edge_release(struct usb_serial *serial)
3005 {
3006         struct edgeport_serial *edge_serial = usb_get_serial_data(serial);
3007
3008         if (edge_serial->is_epic) {
3009                 usb_kill_urb(edge_serial->interrupt_read_urb);
3010                 usb_free_urb(edge_serial->interrupt_read_urb);
3011                 kfree(edge_serial->interrupt_in_buffer);
3012
3013                 usb_kill_urb(edge_serial->read_urb);
3014                 usb_free_urb(edge_serial->read_urb);
3015                 kfree(edge_serial->bulk_in_buffer);
3016         }
3017
3018         kfree(edge_serial);
3019 }
3020
3021 static int edge_port_probe(struct usb_serial_port *port)
3022 {
3023         struct edgeport_port *edge_port;
3024
3025         edge_port = kzalloc(sizeof(*edge_port), GFP_KERNEL);
3026         if (!edge_port)
3027                 return -ENOMEM;
3028
3029         spin_lock_init(&edge_port->ep_lock);
3030         edge_port->port = port;
3031
3032         usb_set_serial_port_data(port, edge_port);
3033
3034         return 0;
3035 }
3036
3037 static int edge_port_remove(struct usb_serial_port *port)
3038 {
3039         struct edgeport_port *edge_port;
3040
3041         edge_port = usb_get_serial_port_data(port);
3042         kfree(edge_port);
3043
3044         return 0;
3045 }
3046
3047 module_usb_serial_driver(serial_drivers, id_table_combined);
3048
3049 MODULE_AUTHOR(DRIVER_AUTHOR);
3050 MODULE_DESCRIPTION(DRIVER_DESC);
3051 MODULE_LICENSE("GPL");
3052 MODULE_FIRMWARE("edgeport/boot.fw");
3053 MODULE_FIRMWARE("edgeport/boot2.fw");
3054 MODULE_FIRMWARE("edgeport/down.fw");
3055 MODULE_FIRMWARE("edgeport/down2.fw");