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 = "/*(DEBLOBBED)*/";
 292                 break;
 293         case EDGE_DOWNLOAD_FILE_80251:
 294                 fw_name = "/*(DEBLOBBED)*/";
 295                 break;
 296         default:
 297                 return;
 298         }
 299
 300         response = reject_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         unsigned long flags;
 576         int bytes_avail;
 577         int position;
 578         int txCredits;
 579         int portNumber;
 580         int result;
 581         int status = urb->status;
 582
 583         switch (status) {
 584         case 0:
 585                 /* success */
 586                 break;
 587         case -ECONNRESET:
 588         case -ENOENT:
 589         case -ESHUTDOWN:
 590                 /* this urb is terminated, clean up */
 591                 dev_dbg(&urb->dev->dev, "%s - urb shutting down with status: %d\n", __func__, status);
 592                 return;
 593         default:
 594                 dev_dbg(&urb->dev->dev, "%s - nonzero urb status received: %d\n", __func__, status);
 595                 goto exit;
 596         }
 597
 598         dev = &edge_serial->serial->dev->dev;
 599
 600         /* process this interrupt-read even if there are no ports open */
 601         if (length) {
 602                 usb_serial_debug_data(dev, __func__, length, data);
 603
 604                 if (length > 1) {
 605                         bytes_avail = data[0] | (data[1] << 8);
 606                         if (bytes_avail) {
 607                                 spin_lock_irqsave(&edge_serial->es_lock, flags);
 608                                 edge_serial->rxBytesAvail += bytes_avail;
 609                                 dev_dbg(dev,
 610                                         "%s - bytes_avail=%d, rxBytesAvail=%d, read_in_progress=%d\n",
 611                                         __func__, bytes_avail,
 612                                         edge_serial->rxBytesAvail,
 613                                         edge_serial->read_in_progress);
 614
 615                                 if (edge_serial->rxBytesAvail > 0 &&
 616                                     !edge_serial->read_in_progress) {
 617                                         dev_dbg(dev, "%s - posting a read\n", __func__);
 618                                         edge_serial->read_in_progress = true;
 619
 620                                         /* we have pending bytes on the
 621                                            bulk in pipe, send a request */
 622                                         result = usb_submit_urb(edge_serial->read_urb, GFP_ATOMIC);
 623                                         if (result) {
 624                                                 dev_err(dev,
 625                                                         "%s - usb_submit_urb(read bulk) failed with result = %d\n",
 626                                                         __func__, result);
 627                                                 edge_serial->read_in_progress = false;
 628                                         }
 629                                 }
 630                                 spin_unlock_irqrestore(&edge_serial->es_lock,
 631                                                        flags);
 632                         }
 633                 }
 634                 /* grab the txcredits for the ports if available */
 635                 position = 2;
 636                 portNumber = 0;
 637                 while ((position < length - 1) &&
 638                                 (portNumber < edge_serial->serial->num_ports)) {
 639                         txCredits = data[position] | (data[position+1] << 8);
 640                         if (txCredits) {
 641                                 port = edge_serial->serial->port[portNumber];
 642                                 edge_port = usb_get_serial_port_data(port);
 643                                 if (edge_port && edge_port->open) {
 644                                         spin_lock_irqsave(&edge_port->ep_lock,
 645                                                           flags);
 646                                         edge_port->txCredits += txCredits;
 647                                         spin_unlock_irqrestore(&edge_port->ep_lock,
 648                                                                flags);
 649                                         dev_dbg(dev, "%s - txcredits for port%d = %d\n",
 650                                                 __func__, portNumber,
 651                                                 edge_port->txCredits);
 652
 653                                         /* tell the tty driver that something
 654                                            has changed */
 655                                         tty_port_tty_wakeup(&edge_port->port->port);
 656                                         /* Since we have more credit, check
 657                                            if more data can be sent */
 658                                         send_more_port_data(edge_serial,
 659                                                                 edge_port);
 660                                 }
 661                         }
 662                         position += 2;
 663                         ++portNumber;
 664                 }
 665         }
 666
 667 exit:
 668         result = usb_submit_urb(urb, GFP_ATOMIC);
 669         if (result)
 670                 dev_err(&urb->dev->dev,
 671                         "%s - Error %d submitting control urb\n",
 672                                                 __func__, result);
 673 }
 674
 675
 676 /*****************************************************************************
 677  * edge_bulk_in_callback
 678  *      this is the callback function for when we have received data on the
 679  *      bulk in endpoint.
 680  *****************************************************************************/
 681 static void edge_bulk_in_callback(struct urb *urb)
 682 {
 683         struct edgeport_serial  *edge_serial = urb->context;
 684         struct device *dev;
 685         unsigned char           *data = urb->transfer_buffer;
 686         int                     retval;
 687         __u16                   raw_data_length;
 688         int status = urb->status;
 689         unsigned long flags;
 690
 691         if (status) {
 692                 dev_dbg(&urb->dev->dev, "%s - nonzero read bulk status received: %d\n",
 693                         __func__, status);
 694                 edge_serial->read_in_progress = false;
 695                 return;
 696         }
 697
 698         if (urb->actual_length == 0) {
 699                 dev_dbg(&urb->dev->dev, "%s - read bulk callback with no data\n", __func__);
 700                 edge_serial->read_in_progress = false;
 701                 return;
 702         }
 703
 704         dev = &edge_serial->serial->dev->dev;
 705         raw_data_length = urb->actual_length;
 706
 707         usb_serial_debug_data(dev, __func__, raw_data_length, data);
 708
 709         spin_lock_irqsave(&edge_serial->es_lock, flags);
 710
 711         /* decrement our rxBytes available by the number that we just got */
 712         edge_serial->rxBytesAvail -= raw_data_length;
 713
 714         dev_dbg(dev, "%s - Received = %d, rxBytesAvail %d\n", __func__,
 715                 raw_data_length, edge_serial->rxBytesAvail);
 716
 717         process_rcvd_data(edge_serial, data, urb->actual_length);
 718
 719         /* check to see if there's any more data for us to read */
 720         if (edge_serial->rxBytesAvail > 0) {
 721                 dev_dbg(dev, "%s - posting a read\n", __func__);
 722                 retval = usb_submit_urb(edge_serial->read_urb, GFP_ATOMIC);
 723                 if (retval) {
 724                         dev_err(dev,
 725                                 "%s - usb_submit_urb(read bulk) failed, retval = %d\n",
 726                                 __func__, retval);
 727                         edge_serial->read_in_progress = false;
 728                 }
 729         } else {
 730                 edge_serial->read_in_progress = false;
 731         }
 732
 733         spin_unlock_irqrestore(&edge_serial->es_lock, flags);
 734 }
 735
 736
 737 /*****************************************************************************
 738  * edge_bulk_out_data_callback
 739  *      this is the callback function for when we have finished sending
 740  *      serial data on the bulk out endpoint.
 741  *****************************************************************************/
 742 static void edge_bulk_out_data_callback(struct urb *urb)
 743 {
 744         struct edgeport_port *edge_port = urb->context;
 745         int status = urb->status;
 746
 747         if (status) {
 748                 dev_dbg(&urb->dev->dev,
 749                         "%s - nonzero write bulk status received: %d\n",
 750                         __func__, status);
 751         }
 752
 753         if (edge_port->open)
 754                 tty_port_tty_wakeup(&edge_port->port->port);
 755
 756         /* Release the Write URB */
 757         edge_port->write_in_progress = false;
 758
 759         /* Check if more data needs to be sent */
 760         send_more_port_data((struct edgeport_serial *)
 761                 (usb_get_serial_data(edge_port->port->serial)), edge_port);
 762 }
 763
 764
 765 /*****************************************************************************
 766  * BulkOutCmdCallback
 767  *      this is the callback function for when we have finished sending a
 768  *      command on the bulk out endpoint.
 769  *****************************************************************************/
 770 static void edge_bulk_out_cmd_callback(struct urb *urb)
 771 {
 772         struct edgeport_port *edge_port = urb->context;
 773         int status = urb->status;
 774
 775         atomic_dec(&CmdUrbs);
 776         dev_dbg(&urb->dev->dev, "%s - FREE URB %p (outstanding %d)\n",
 777                 __func__, urb, atomic_read(&CmdUrbs));
 778
 779
 780         /* clean up the transfer buffer */
 781         kfree(urb->transfer_buffer);
 782
 783         /* Free the command urb */
 784         usb_free_urb(urb);
 785
 786         if (status) {
 787                 dev_dbg(&urb->dev->dev,
 788                         "%s - nonzero write bulk status received: %d\n",
 789                         __func__, status);
 790                 return;
 791         }
 792
 793         /* tell the tty driver that something has changed */
 794         if (edge_port->open)
 795                 tty_port_tty_wakeup(&edge_port->port->port);
 796
 797         /* we have completed the command */
 798         edge_port->commandPending = false;
 799         wake_up(&edge_port->wait_command);
 800 }
 801
 802
 803 /*****************************************************************************
 804  * Driver tty interface functions
 805  *****************************************************************************/
 806
 807 /*****************************************************************************
 808  * SerialOpen
 809  *      this function is called by the tty driver when a port is opened
 810  *      If successful, we return 0
 811  *      Otherwise we return a negative error number.
 812  *****************************************************************************/
 813 static int edge_open(struct tty_struct *tty, struct usb_serial_port *port)
 814 {
 815         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
 816         struct device *dev = &port->dev;
 817         struct usb_serial *serial;
 818         struct edgeport_serial *edge_serial;
 819         int response;
 820
 821         if (edge_port == NULL)
 822                 return -ENODEV;
 823
 824         /* see if we've set up our endpoint info yet (can't set it up
 825            in edge_startup as the structures were not set up at that time.) */
 826         serial = port->serial;
 827         edge_serial = usb_get_serial_data(serial);
 828         if (edge_serial == NULL)
 829                 return -ENODEV;
 830         if (edge_serial->interrupt_in_buffer == NULL) {
 831                 struct usb_serial_port *port0 = serial->port[0];
 832
 833                 /* not set up yet, so do it now */
 834                 edge_serial->interrupt_in_buffer =
 835                                         port0->interrupt_in_buffer;
 836                 edge_serial->interrupt_in_endpoint =
 837                                         port0->interrupt_in_endpointAddress;
 838                 edge_serial->interrupt_read_urb = port0->interrupt_in_urb;
 839                 edge_serial->bulk_in_buffer = port0->bulk_in_buffer;
 840                 edge_serial->bulk_in_endpoint =
 841                                         port0->bulk_in_endpointAddress;
 842                 edge_serial->read_urb = port0->read_urb;
 843                 edge_serial->bulk_out_endpoint =
 844                                         port0->bulk_out_endpointAddress;
 845
 846                 /* set up our interrupt urb */
 847                 usb_fill_int_urb(edge_serial->interrupt_read_urb,
 848                       serial->dev,
 849                       usb_rcvintpipe(serial->dev,
 850                                 port0->interrupt_in_endpointAddress),
 851                       port0->interrupt_in_buffer,
 852                       edge_serial->interrupt_read_urb->transfer_buffer_length,
 853                       edge_interrupt_callback, edge_serial,
 854                       edge_serial->interrupt_read_urb->interval);
 855
 856                 /* set up our bulk in urb */
 857                 usb_fill_bulk_urb(edge_serial->read_urb, serial->dev,
 858                         usb_rcvbulkpipe(serial->dev,
 859                                 port0->bulk_in_endpointAddress),
 860                         port0->bulk_in_buffer,
 861                         edge_serial->read_urb->transfer_buffer_length,
 862                         edge_bulk_in_callback, edge_serial);
 863                 edge_serial->read_in_progress = false;
 864
 865                 /* start interrupt read for this edgeport
 866                  * this interrupt will continue as long
 867                  * as the edgeport is connected */
 868                 response = usb_submit_urb(edge_serial->interrupt_read_urb,
 869                                                                 GFP_KERNEL);
 870                 if (response) {
 871                         dev_err(dev, "%s - Error %d submitting control urb\n",
 872                                 __func__, response);
 873                 }
 874         }
 875
 876         /* initialize our wait queues */
 877         init_waitqueue_head(&edge_port->wait_open);
 878         init_waitqueue_head(&edge_port->wait_chase);
 879         init_waitqueue_head(&edge_port->wait_command);
 880
 881         /* initialize our port settings */
 882         edge_port->txCredits = 0;       /* Can't send any data yet */
 883         /* Must always set this bit to enable ints! */
 884         edge_port->shadowMCR = MCR_MASTER_IE;
 885         edge_port->chaseResponsePending = false;
 886
 887         /* send a open port command */
 888         edge_port->openPending = true;
 889         edge_port->open        = false;
 890         response = send_iosp_ext_cmd(edge_port, IOSP_CMD_OPEN_PORT, 0);
 891
 892         if (response < 0) {
 893                 dev_err(dev, "%s - error sending open port command\n", __func__);
 894                 edge_port->openPending = false;
 895                 return -ENODEV;
 896         }
 897
 898         /* now wait for the port to be completely opened */
 899         wait_event_timeout(edge_port->wait_open, !edge_port->openPending,
 900                                                                 OPEN_TIMEOUT);
 901
 902         if (!edge_port->open) {
 903                 /* open timed out */
 904                 dev_dbg(dev, "%s - open timedout\n", __func__);
 905                 edge_port->openPending = false;
 906                 return -ENODEV;
 907         }
 908
 909         /* create the txfifo */
 910         edge_port->txfifo.head  = 0;
 911         edge_port->txfifo.tail  = 0;
 912         edge_port->txfifo.count = 0;
 913         edge_port->txfifo.size  = edge_port->maxTxCredits;
 914         edge_port->txfifo.fifo  = kmalloc(edge_port->maxTxCredits, GFP_KERNEL);
 915
 916         if (!edge_port->txfifo.fifo) {
 917                 edge_close(port);
 918                 return -ENOMEM;
 919         }
 920
 921         /* Allocate a URB for the write */
 922         edge_port->write_urb = usb_alloc_urb(0, GFP_KERNEL);
 923         edge_port->write_in_progress = false;
 924
 925         if (!edge_port->write_urb) {
 926                 edge_close(port);
 927                 return -ENOMEM;
 928         }
 929
 930         dev_dbg(dev, "%s - Initialize TX fifo to %d bytes\n",
 931                 __func__, edge_port->maxTxCredits);
 932
 933         return 0;
 934 }
 935
 936
 937 /************************************************************************
 938  *
 939  * block_until_chase_response
 940  *
 941  *      This function will block the close until one of the following:
 942  *              1. Response to our Chase comes from Edgeport
 943  *              2. A timeout of 10 seconds without activity has expired
 944  *                 (1K of Edgeport data @ 2400 baud ==> 4 sec to empty)
 945  *
 946  ************************************************************************/
 947 static void block_until_chase_response(struct edgeport_port *edge_port)
 948 {
 949         struct device *dev = &edge_port->port->dev;
 950         DEFINE_WAIT(wait);
 951         __u16 lastCredits;
 952         int timeout = 1*HZ;
 953         int loop = 10;
 954
 955         while (1) {
 956                 /* Save Last credits */
 957                 lastCredits = edge_port->txCredits;
 958
 959                 /* Did we get our Chase response */
 960                 if (!edge_port->chaseResponsePending) {
 961                         dev_dbg(dev, "%s - Got Chase Response\n", __func__);
 962
 963                         /* did we get all of our credit back? */
 964                         if (edge_port->txCredits == edge_port->maxTxCredits) {
 965                                 dev_dbg(dev, "%s - Got all credits\n", __func__);
 966                                 return;
 967                         }
 968                 }
 969
 970                 /* Block the thread for a while */
 971                 prepare_to_wait(&edge_port->wait_chase, &wait,
 972                                                 TASK_UNINTERRUPTIBLE);
 973                 schedule_timeout(timeout);
 974                 finish_wait(&edge_port->wait_chase, &wait);
 975
 976                 if (lastCredits == edge_port->txCredits) {
 977                         /* No activity.. count down. */
 978                         loop--;
 979                         if (loop == 0) {
 980                                 edge_port->chaseResponsePending = false;
 981                                 dev_dbg(dev, "%s - Chase TIMEOUT\n", __func__);
 982                                 return;
 983                         }
 984                 } else {
 985                         /* Reset timeout value back to 10 seconds */
 986                         dev_dbg(dev, "%s - Last %d, Current %d\n", __func__,
 987                                         lastCredits, edge_port->txCredits);
 988                         loop = 10;
 989                 }
 990         }
 991 }
 992
 993
 994 /************************************************************************
 995  *
 996  * block_until_tx_empty
 997  *
 998  *      This function will block the close until one of the following:
 999  *              1. TX count are 0
1000  *              2. The edgeport has stopped
1001  *              3. A timeout of 3 seconds without activity has expired
1002  *
1003  ************************************************************************/
1004 static void block_until_tx_empty(struct edgeport_port *edge_port)
1005 {
1006         struct device *dev = &edge_port->port->dev;
1007         DEFINE_WAIT(wait);
1008         struct TxFifo *fifo = &edge_port->txfifo;
1009         __u32 lastCount;
1010         int timeout = HZ/10;
1011         int loop = 30;
1012
1013         while (1) {
1014                 /* Save Last count */
1015                 lastCount = fifo->count;
1016
1017                 /* Is the Edgeport Buffer empty? */
1018                 if (lastCount == 0) {
1019                         dev_dbg(dev, "%s - TX Buffer Empty\n", __func__);
1020                         return;
1021                 }
1022
1023                 /* Block the thread for a while */
1024                 prepare_to_wait(&edge_port->wait_chase, &wait,
1025                                                 TASK_UNINTERRUPTIBLE);
1026                 schedule_timeout(timeout);
1027                 finish_wait(&edge_port->wait_chase, &wait);
1028
1029                 dev_dbg(dev, "%s wait\n", __func__);
1030
1031                 if (lastCount == fifo->count) {
1032                         /* No activity.. count down. */
1033                         loop--;
1034                         if (loop == 0) {
1035                                 dev_dbg(dev, "%s - TIMEOUT\n", __func__);
1036                                 return;
1037                         }
1038                 } else {
1039                         /* Reset timeout value back to seconds */
1040                         loop = 30;
1041                 }
1042         }
1043 }
1044
1045
1046 /*****************************************************************************
1047  * edge_close
1048  *      this function is called by the tty driver when a port is closed
1049  *****************************************************************************/
1050 static void edge_close(struct usb_serial_port *port)
1051 {
1052         struct edgeport_serial *edge_serial;
1053         struct edgeport_port *edge_port;
1054         int status;
1055
1056         edge_serial = usb_get_serial_data(port->serial);
1057         edge_port = usb_get_serial_port_data(port);
1058         if (edge_serial == NULL || edge_port == NULL)
1059                 return;
1060
1061         /* block until tx is empty */
1062         block_until_tx_empty(edge_port);
1063
1064         edge_port->closePending = true;
1065
1066         if (!edge_serial->is_epic ||
1067             edge_serial->epic_descriptor.Supports.IOSPChase) {
1068                 /* flush and chase */
1069                 edge_port->chaseResponsePending = true;
1070
1071                 dev_dbg(&port->dev, "%s - Sending IOSP_CMD_CHASE_PORT\n", __func__);
1072                 status = send_iosp_ext_cmd(edge_port, IOSP_CMD_CHASE_PORT, 0);
1073                 if (status == 0)
1074                         /* block until chase finished */
1075                         block_until_chase_response(edge_port);
1076                 else
1077                         edge_port->chaseResponsePending = false;
1078         }
1079
1080         if (!edge_serial->is_epic ||
1081             edge_serial->epic_descriptor.Supports.IOSPClose) {
1082                /* close the port */
1083                 dev_dbg(&port->dev, "%s - Sending IOSP_CMD_CLOSE_PORT\n", __func__);
1084                 send_iosp_ext_cmd(edge_port, IOSP_CMD_CLOSE_PORT, 0);
1085         }
1086
1087         /* port->close = true; */
1088         edge_port->closePending = false;
1089         edge_port->open = false;
1090         edge_port->openPending = false;
1091
1092         usb_kill_urb(edge_port->write_urb);
1093
1094         if (edge_port->write_urb) {
1095                 /* if this urb had a transfer buffer already
1096                                 (old transfer) free it */
1097                 kfree(edge_port->write_urb->transfer_buffer);
1098                 usb_free_urb(edge_port->write_urb);
1099                 edge_port->write_urb = NULL;
1100         }
1101         kfree(edge_port->txfifo.fifo);
1102         edge_port->txfifo.fifo = NULL;
1103 }
1104
1105 /*****************************************************************************
1106  * SerialWrite
1107  *      this function is called by the tty driver when data should be written
1108  *      to the port.
1109  *      If successful, we return the number of bytes written, otherwise we
1110  *      return a negative error number.
1111  *****************************************************************************/
1112 static int edge_write(struct tty_struct *tty, struct usb_serial_port *port,
1113                                         const unsigned char *data, int count)
1114 {
1115         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1116         struct TxFifo *fifo;
1117         int copySize;
1118         int bytesleft;
1119         int firsthalf;
1120         int secondhalf;
1121         unsigned long flags;
1122
1123         if (edge_port == NULL)
1124                 return -ENODEV;
1125
1126         /* get a pointer to the Tx fifo */
1127         fifo = &edge_port->txfifo;
1128
1129         spin_lock_irqsave(&edge_port->ep_lock, flags);
1130
1131         /* calculate number of bytes to put in fifo */
1132         copySize = min((unsigned int)count,
1133                                 (edge_port->txCredits - fifo->count));
1134
1135         dev_dbg(&port->dev, "%s of %d byte(s) Fifo room  %d -- will copy %d bytes\n",
1136                 __func__, count, edge_port->txCredits - fifo->count, copySize);
1137
1138         /* catch writes of 0 bytes which the tty driver likes to give us,
1139            and when txCredits is empty */
1140         if (copySize == 0) {
1141                 dev_dbg(&port->dev, "%s - copySize = Zero\n", __func__);
1142                 goto finish_write;
1143         }
1144
1145         /* queue the data
1146          * since we can never overflow the buffer we do not have to check for a
1147          * full condition
1148          *
1149          * the copy is done is two parts -- first fill to the end of the buffer
1150          * then copy the reset from the start of the buffer
1151          */
1152         bytesleft = fifo->size - fifo->head;
1153         firsthalf = min(bytesleft, copySize);
1154         dev_dbg(&port->dev, "%s - copy %d bytes of %d into fifo \n", __func__,
1155                 firsthalf, bytesleft);
1156
1157         /* now copy our data */
1158         memcpy(&fifo->fifo[fifo->head], data, firsthalf);
1159         usb_serial_debug_data(&port->dev, __func__, firsthalf, &fifo->fifo[fifo->head]);
1160
1161         /* update the index and size */
1162         fifo->head  += firsthalf;
1163         fifo->count += firsthalf;
1164
1165         /* wrap the index */
1166         if (fifo->head == fifo->size)
1167                 fifo->head = 0;
1168
1169         secondhalf = copySize-firsthalf;
1170
1171         if (secondhalf) {
1172                 dev_dbg(&port->dev, "%s - copy rest of data %d\n", __func__, secondhalf);
1173                 memcpy(&fifo->fifo[fifo->head], &data[firsthalf], secondhalf);
1174                 usb_serial_debug_data(&port->dev, __func__, secondhalf, &fifo->fifo[fifo->head]);
1175                 /* update the index and size */
1176                 fifo->count += secondhalf;
1177                 fifo->head  += secondhalf;
1178                 /* No need to check for wrap since we can not get to end of
1179                  * the fifo in this part
1180                  */
1181         }
1182
1183 finish_write:
1184         spin_unlock_irqrestore(&edge_port->ep_lock, flags);
1185
1186         send_more_port_data((struct edgeport_serial *)
1187                         usb_get_serial_data(port->serial), edge_port);
1188
1189         dev_dbg(&port->dev, "%s wrote %d byte(s) TxCredits %d, Fifo %d\n",
1190                 __func__, copySize, edge_port->txCredits, fifo->count);
1191
1192         return copySize;
1193 }
1194
1195
1196 /************************************************************************
1197  *
1198  * send_more_port_data()
1199  *
1200  *      This routine attempts to write additional UART transmit data
1201  *      to a port over the USB bulk pipe. It is called (1) when new
1202  *      data has been written to a port's TxBuffer from higher layers
1203  *      (2) when the peripheral sends us additional TxCredits indicating
1204  *      that it can accept more Tx data for a given port; and (3) when
1205  *      a bulk write completes successfully and we want to see if we
1206  *      can transmit more.
1207  *
1208  ************************************************************************/
1209 static void send_more_port_data(struct edgeport_serial *edge_serial,
1210                                         struct edgeport_port *edge_port)
1211 {
1212         struct TxFifo   *fifo = &edge_port->txfifo;
1213         struct device   *dev = &edge_port->port->dev;
1214         struct urb      *urb;
1215         unsigned char   *buffer;
1216         int             status;
1217         int             count;
1218         int             bytesleft;
1219         int             firsthalf;
1220         int             secondhalf;
1221         unsigned long   flags;
1222
1223         spin_lock_irqsave(&edge_port->ep_lock, flags);
1224
1225         if (edge_port->write_in_progress ||
1226             !edge_port->open             ||
1227             (fifo->count == 0)) {
1228                 dev_dbg(dev, "%s EXIT - fifo %d, PendingWrite = %d\n",
1229                         __func__, fifo->count, edge_port->write_in_progress);
1230                 goto exit_send;
1231         }
1232
1233         /* since the amount of data in the fifo will always fit into the
1234          * edgeport buffer we do not need to check the write length
1235          *
1236          * Do we have enough credits for this port to make it worthwhile
1237          * to bother queueing a write. If it's too small, say a few bytes,
1238          * it's better to wait for more credits so we can do a larger write.
1239          */
1240         if (edge_port->txCredits < EDGE_FW_GET_TX_CREDITS_SEND_THRESHOLD(edge_port->maxTxCredits, EDGE_FW_BULK_MAX_PACKET_SIZE)) {
1241                 dev_dbg(dev, "%s Not enough credit - fifo %d TxCredit %d\n",
1242                         __func__, fifo->count, edge_port->txCredits);
1243                 goto exit_send;
1244         }
1245
1246         /* lock this write */
1247         edge_port->write_in_progress = true;
1248
1249         /* get a pointer to the write_urb */
1250         urb = edge_port->write_urb;
1251
1252         /* make sure transfer buffer is freed */
1253         kfree(urb->transfer_buffer);
1254         urb->transfer_buffer = NULL;
1255
1256         /* build the data header for the buffer and port that we are about
1257            to send out */
1258         count = fifo->count;
1259         buffer = kmalloc(count+2, GFP_ATOMIC);
1260         if (!buffer) {
1261                 edge_port->write_in_progress = false;
1262                 goto exit_send;
1263         }
1264         buffer[0] = IOSP_BUILD_DATA_HDR1(edge_port->port->port_number, count);
1265         buffer[1] = IOSP_BUILD_DATA_HDR2(edge_port->port->port_number, count);
1266
1267         /* now copy our data */
1268         bytesleft =  fifo->size - fifo->tail;
1269         firsthalf = min(bytesleft, count);
1270         memcpy(&buffer[2], &fifo->fifo[fifo->tail], firsthalf);
1271         fifo->tail  += firsthalf;
1272         fifo->count -= firsthalf;
1273         if (fifo->tail == fifo->size)
1274                 fifo->tail = 0;
1275
1276         secondhalf = count-firsthalf;
1277         if (secondhalf) {
1278                 memcpy(&buffer[2+firsthalf], &fifo->fifo[fifo->tail],
1279                                                                 secondhalf);
1280                 fifo->tail  += secondhalf;
1281                 fifo->count -= secondhalf;
1282         }
1283
1284         if (count)
1285                 usb_serial_debug_data(&edge_port->port->dev, __func__, count, &buffer[2]);
1286
1287         /* fill up the urb with all of our data and submit it */
1288         usb_fill_bulk_urb(urb, edge_serial->serial->dev,
1289                         usb_sndbulkpipe(edge_serial->serial->dev,
1290                                         edge_serial->bulk_out_endpoint),
1291                         buffer, count+2,
1292                         edge_bulk_out_data_callback, edge_port);
1293
1294         /* decrement the number of credits we have by the number we just sent */
1295         edge_port->txCredits -= count;
1296         edge_port->port->icount.tx += count;
1297
1298         status = usb_submit_urb(urb, GFP_ATOMIC);
1299         if (status) {
1300                 /* something went wrong */
1301                 dev_err_console(edge_port->port,
1302                         "%s - usb_submit_urb(write bulk) failed, status = %d, data lost\n",
1303                                 __func__, status);
1304                 edge_port->write_in_progress = false;
1305
1306                 /* revert the credits as something bad happened. */
1307                 edge_port->txCredits += count;
1308                 edge_port->port->icount.tx -= count;
1309         }
1310         dev_dbg(dev, "%s wrote %d byte(s) TxCredit %d, Fifo %d\n",
1311                 __func__, count, edge_port->txCredits, fifo->count);
1312
1313 exit_send:
1314         spin_unlock_irqrestore(&edge_port->ep_lock, flags);
1315 }
1316
1317
1318 /*****************************************************************************
1319  * edge_write_room
1320  *      this function is called by the tty driver when it wants to know how
1321  *      many bytes of data we can accept for a specific port. If successful,
1322  *      we return the amount of room that we have for this port (the txCredits)
1323  *      otherwise we return a negative error number.
1324  *****************************************************************************/
1325 static int edge_write_room(struct tty_struct *tty)
1326 {
1327         struct usb_serial_port *port = tty->driver_data;
1328         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1329         int room;
1330         unsigned long flags;
1331
1332         if (edge_port == NULL)
1333                 return 0;
1334         if (edge_port->closePending)
1335                 return 0;
1336
1337         if (!edge_port->open) {
1338                 dev_dbg(&port->dev, "%s - port not opened\n", __func__);
1339                 return 0;
1340         }
1341
1342         /* total of both buffers is still txCredit */
1343         spin_lock_irqsave(&edge_port->ep_lock, flags);
1344         room = edge_port->txCredits - edge_port->txfifo.count;
1345         spin_unlock_irqrestore(&edge_port->ep_lock, flags);
1346
1347         dev_dbg(&port->dev, "%s - returns %d\n", __func__, room);
1348         return room;
1349 }
1350
1351
1352 /*****************************************************************************
1353  * edge_chars_in_buffer
1354  *      this function is called by the tty driver when it wants to know how
1355  *      many bytes of data we currently have outstanding in the port (data that
1356  *      has been written, but hasn't made it out the port yet)
1357  *      If successful, we return the number of bytes left to be written in the
1358  *      system,
1359  *      Otherwise we return a negative error number.
1360  *****************************************************************************/
1361 static int edge_chars_in_buffer(struct tty_struct *tty)
1362 {
1363         struct usb_serial_port *port = tty->driver_data;
1364         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1365         int num_chars;
1366         unsigned long flags;
1367
1368         if (edge_port == NULL)
1369                 return 0;
1370         if (edge_port->closePending)
1371                 return 0;
1372
1373         if (!edge_port->open) {
1374                 dev_dbg(&port->dev, "%s - port not opened\n", __func__);
1375                 return 0;
1376         }
1377
1378         spin_lock_irqsave(&edge_port->ep_lock, flags);
1379         num_chars = edge_port->maxTxCredits - edge_port->txCredits +
1380                                                 edge_port->txfifo.count;
1381         spin_unlock_irqrestore(&edge_port->ep_lock, flags);
1382         if (num_chars) {
1383                 dev_dbg(&port->dev, "%s - returns %d\n", __func__, num_chars);
1384         }
1385
1386         return num_chars;
1387 }
1388
1389
1390 /*****************************************************************************
1391  * SerialThrottle
1392  *      this function is called by the tty driver when it wants to stop the data
1393  *      being read from the port.
1394  *****************************************************************************/
1395 static void edge_throttle(struct tty_struct *tty)
1396 {
1397         struct usb_serial_port *port = tty->driver_data;
1398         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1399         int status;
1400
1401         if (edge_port == NULL)
1402                 return;
1403
1404         if (!edge_port->open) {
1405                 dev_dbg(&port->dev, "%s - port not opened\n", __func__);
1406                 return;
1407         }
1408
1409         /* if we are implementing XON/XOFF, send the stop character */
1410         if (I_IXOFF(tty)) {
1411                 unsigned char stop_char = STOP_CHAR(tty);
1412                 status = edge_write(tty, port, &stop_char, 1);
1413                 if (status <= 0)
1414                         return;
1415         }
1416
1417         /* if we are implementing RTS/CTS, toggle that line */
1418         if (C_CRTSCTS(tty)) {
1419                 edge_port->shadowMCR &= ~MCR_RTS;
1420                 status = send_cmd_write_uart_register(edge_port, MCR,
1421                                                         edge_port->shadowMCR);
1422                 if (status != 0)
1423                         return;
1424         }
1425 }
1426
1427
1428 /*****************************************************************************
1429  * edge_unthrottle
1430  *      this function is called by the tty driver when it wants to resume the
1431  *      data being read from the port (called after SerialThrottle is called)
1432  *****************************************************************************/
1433 static void edge_unthrottle(struct tty_struct *tty)
1434 {
1435         struct usb_serial_port *port = tty->driver_data;
1436         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1437         int status;
1438
1439         if (edge_port == NULL)
1440                 return;
1441
1442         if (!edge_port->open) {
1443                 dev_dbg(&port->dev, "%s - port not opened\n", __func__);
1444                 return;
1445         }
1446
1447         /* if we are implementing XON/XOFF, send the start character */
1448         if (I_IXOFF(tty)) {
1449                 unsigned char start_char = START_CHAR(tty);
1450                 status = edge_write(tty, port, &start_char, 1);
1451                 if (status <= 0)
1452                         return;
1453         }
1454         /* if we are implementing RTS/CTS, toggle that line */
1455         if (C_CRTSCTS(tty)) {
1456                 edge_port->shadowMCR |= MCR_RTS;
1457                 send_cmd_write_uart_register(edge_port, MCR,
1458                                                 edge_port->shadowMCR);
1459         }
1460 }
1461
1462
1463 /*****************************************************************************
1464  * SerialSetTermios
1465  *      this function is called by the tty driver when it wants to change
1466  * the termios structure
1467  *****************************************************************************/
1468 static void edge_set_termios(struct tty_struct *tty,
1469         struct usb_serial_port *port, struct ktermios *old_termios)
1470 {
1471         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1472         unsigned int cflag;
1473
1474         cflag = tty->termios.c_cflag;
1475         dev_dbg(&port->dev, "%s - clfag %08x iflag %08x\n", __func__, tty->termios.c_cflag, tty->termios.c_iflag);
1476         dev_dbg(&port->dev, "%s - old clfag %08x old iflag %08x\n", __func__, old_termios->c_cflag, old_termios->c_iflag);
1477
1478         if (edge_port == NULL)
1479                 return;
1480
1481         if (!edge_port->open) {
1482                 dev_dbg(&port->dev, "%s - port not opened\n", __func__);
1483                 return;
1484         }
1485
1486         /* change the port settings to the new ones specified */
1487         change_port_settings(tty, edge_port, old_termios);
1488 }
1489
1490
1491 /*****************************************************************************
1492  * get_lsr_info - get line status register info
1493  *
1494  * Purpose: Let user call ioctl() to get info when the UART physically
1495  *          is emptied.  On bus types like RS485, the transmitter must
1496  *          release the bus after transmitting. This must be done when
1497  *          the transmit shift register is empty, not be done when the
1498  *          transmit holding register is empty.  This functionality
1499  *          allows an RS485 driver to be written in user space.
1500  *****************************************************************************/
1501 static int get_lsr_info(struct edgeport_port *edge_port,
1502                                                 unsigned int __user *value)
1503 {
1504         unsigned int result = 0;
1505         unsigned long flags;
1506
1507         spin_lock_irqsave(&edge_port->ep_lock, flags);
1508         if (edge_port->maxTxCredits == edge_port->txCredits &&
1509             edge_port->txfifo.count == 0) {
1510                 dev_dbg(&edge_port->port->dev, "%s -- Empty\n", __func__);
1511                 result = TIOCSER_TEMT;
1512         }
1513         spin_unlock_irqrestore(&edge_port->ep_lock, flags);
1514
1515         if (copy_to_user(value, &result, sizeof(int)))
1516                 return -EFAULT;
1517         return 0;
1518 }
1519
1520 static int edge_tiocmset(struct tty_struct *tty,
1521                                         unsigned int set, unsigned int clear)
1522 {
1523         struct usb_serial_port *port = tty->driver_data;
1524         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1525         unsigned int mcr;
1526
1527         mcr = edge_port->shadowMCR;
1528         if (set & TIOCM_RTS)
1529                 mcr |= MCR_RTS;
1530         if (set & TIOCM_DTR)
1531                 mcr |= MCR_DTR;
1532         if (set & TIOCM_LOOP)
1533                 mcr |= MCR_LOOPBACK;
1534
1535         if (clear & TIOCM_RTS)
1536                 mcr &= ~MCR_RTS;
1537         if (clear & TIOCM_DTR)
1538                 mcr &= ~MCR_DTR;
1539         if (clear & TIOCM_LOOP)
1540                 mcr &= ~MCR_LOOPBACK;
1541
1542         edge_port->shadowMCR = mcr;
1543
1544         send_cmd_write_uart_register(edge_port, MCR, edge_port->shadowMCR);
1545
1546         return 0;
1547 }
1548
1549 static int edge_tiocmget(struct tty_struct *tty)
1550 {
1551         struct usb_serial_port *port = tty->driver_data;
1552         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1553         unsigned int result = 0;
1554         unsigned int msr;
1555         unsigned int mcr;
1556
1557         msr = edge_port->shadowMSR;
1558         mcr = edge_port->shadowMCR;
1559         result = ((mcr & MCR_DTR)       ? TIOCM_DTR: 0)   /* 0x002 */
1560                   | ((mcr & MCR_RTS)    ? TIOCM_RTS: 0)   /* 0x004 */
1561                   | ((msr & EDGEPORT_MSR_CTS)   ? TIOCM_CTS: 0)   /* 0x020 */
1562                   | ((msr & EDGEPORT_MSR_CD)    ? TIOCM_CAR: 0)   /* 0x040 */
1563                   | ((msr & EDGEPORT_MSR_RI)    ? TIOCM_RI:  0)   /* 0x080 */
1564                   | ((msr & EDGEPORT_MSR_DSR)   ? TIOCM_DSR: 0);  /* 0x100 */
1565
1566         return result;
1567 }
1568
1569 static int get_serial_info(struct edgeport_port *edge_port,
1570                                 struct serial_struct __user *retinfo)
1571 {
1572         struct serial_struct tmp;
1573
1574         if (!retinfo)
1575                 return -EFAULT;
1576
1577         memset(&tmp, 0, sizeof(tmp));
1578
1579         tmp.type                = PORT_16550A;
1580         tmp.line                = edge_port->port->minor;
1581         tmp.port                = edge_port->port->port_number;
1582         tmp.irq                 = 0;
1583         tmp.flags               = ASYNC_SKIP_TEST | ASYNC_AUTO_IRQ;
1584         tmp.xmit_fifo_size      = edge_port->maxTxCredits;
1585         tmp.baud_base           = 9600;
1586         tmp.close_delay         = 5*HZ;
1587         tmp.closing_wait        = 30*HZ;
1588
1589         if (copy_to_user(retinfo, &tmp, sizeof(*retinfo)))
1590                 return -EFAULT;
1591         return 0;
1592 }
1593
1594
1595 /*****************************************************************************
1596  * SerialIoctl
1597  *      this function handles any ioctl calls to the driver
1598  *****************************************************************************/
1599 static int edge_ioctl(struct tty_struct *tty,
1600                                         unsigned int cmd, unsigned long arg)
1601 {
1602         struct usb_serial_port *port = tty->driver_data;
1603         DEFINE_WAIT(wait);
1604         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1605
1606         switch (cmd) {
1607         case TIOCSERGETLSR:
1608                 dev_dbg(&port->dev, "%s TIOCSERGETLSR\n", __func__);
1609                 return get_lsr_info(edge_port, (unsigned int __user *) arg);
1610
1611         case TIOCGSERIAL:
1612                 dev_dbg(&port->dev, "%s TIOCGSERIAL\n", __func__);
1613                 return get_serial_info(edge_port, (struct serial_struct __user *) arg);
1614         }
1615         return -ENOIOCTLCMD;
1616 }
1617
1618
1619 /*****************************************************************************
1620  * SerialBreak
1621  *      this function sends a break to the port
1622  *****************************************************************************/
1623 static void edge_break(struct tty_struct *tty, int break_state)
1624 {
1625         struct usb_serial_port *port = tty->driver_data;
1626         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1627         struct edgeport_serial *edge_serial = usb_get_serial_data(port->serial);
1628         int status;
1629
1630         if (!edge_serial->is_epic ||
1631             edge_serial->epic_descriptor.Supports.IOSPChase) {
1632                 /* flush and chase */
1633                 edge_port->chaseResponsePending = true;
1634
1635                 dev_dbg(&port->dev, "%s - Sending IOSP_CMD_CHASE_PORT\n", __func__);
1636                 status = send_iosp_ext_cmd(edge_port, IOSP_CMD_CHASE_PORT, 0);
1637                 if (status == 0) {
1638                         /* block until chase finished */
1639                         block_until_chase_response(edge_port);
1640                 } else {
1641                         edge_port->chaseResponsePending = false;
1642                 }
1643         }
1644
1645         if (!edge_serial->is_epic ||
1646             edge_serial->epic_descriptor.Supports.IOSPSetClrBreak) {
1647                 if (break_state == -1) {
1648                         dev_dbg(&port->dev, "%s - Sending IOSP_CMD_SET_BREAK\n", __func__);
1649                         status = send_iosp_ext_cmd(edge_port,
1650                                                 IOSP_CMD_SET_BREAK, 0);
1651                 } else {
1652                         dev_dbg(&port->dev, "%s - Sending IOSP_CMD_CLEAR_BREAK\n", __func__);
1653                         status = send_iosp_ext_cmd(edge_port,
1654                                                 IOSP_CMD_CLEAR_BREAK, 0);
1655                 }
1656                 if (status)
1657                         dev_dbg(&port->dev, "%s - error sending break set/clear command.\n",
1658                                 __func__);
1659         }
1660 }
1661
1662
1663 /*****************************************************************************
1664  * process_rcvd_data
1665  *      this function handles the data received on the bulk in pipe.
1666  *****************************************************************************/
1667 static void process_rcvd_data(struct edgeport_serial *edge_serial,
1668                                 unsigned char *buffer, __u16 bufferLength)
1669 {
1670         struct usb_serial *serial = edge_serial->serial;
1671         struct device *dev = &serial->dev->dev;
1672         struct usb_serial_port *port;
1673         struct edgeport_port *edge_port;
1674         __u16 lastBufferLength;
1675         __u16 rxLen;
1676
1677         lastBufferLength = bufferLength + 1;
1678
1679         while (bufferLength > 0) {
1680                 /* failsafe incase we get a message that we don't understand */
1681                 if (lastBufferLength == bufferLength) {
1682                         dev_dbg(dev, "%s - stuck in loop, exiting it.\n", __func__);
1683                         break;
1684                 }
1685                 lastBufferLength = bufferLength;
1686
1687                 switch (edge_serial->rxState) {
1688                 case EXPECT_HDR1:
1689                         edge_serial->rxHeader1 = *buffer;
1690                         ++buffer;
1691                         --bufferLength;
1692
1693                         if (bufferLength == 0) {
1694                                 edge_serial->rxState = EXPECT_HDR2;
1695                                 break;
1696                         }
1697                         /* otherwise, drop on through */
1698                 case EXPECT_HDR2:
1699                         edge_serial->rxHeader2 = *buffer;
1700                         ++buffer;
1701                         --bufferLength;
1702
1703                         dev_dbg(dev, "%s - Hdr1=%02X Hdr2=%02X\n", __func__,
1704                                 edge_serial->rxHeader1, edge_serial->rxHeader2);
1705                         /* Process depending on whether this header is
1706                          * data or status */
1707
1708                         if (IS_CMD_STAT_HDR(edge_serial->rxHeader1)) {
1709                                 /* Decode this status header and go to
1710                                  * EXPECT_HDR1 (if we can process the status
1711                                  * with only 2 bytes), or go to EXPECT_HDR3 to
1712                                  * get the third byte. */
1713                                 edge_serial->rxPort =
1714                                     IOSP_GET_HDR_PORT(edge_serial->rxHeader1);
1715                                 edge_serial->rxStatusCode =
1716                                     IOSP_GET_STATUS_CODE(
1717                                                 edge_serial->rxHeader1);
1718
1719                                 if (!IOSP_STATUS_IS_2BYTE(
1720                                                 edge_serial->rxStatusCode)) {
1721                                         /* This status needs additional bytes.
1722                                          * Save what we have and then wait for
1723                                          * more data.
1724                                          */
1725                                         edge_serial->rxStatusParam
1726                                                 = edge_serial->rxHeader2;
1727                                         edge_serial->rxState = EXPECT_HDR3;
1728                                         break;
1729                                 }
1730                                 /* We have all the header bytes, process the
1731                                    status now */
1732                                 process_rcvd_status(edge_serial,
1733                                                 edge_serial->rxHeader2, 0);
1734                                 edge_serial->rxState = EXPECT_HDR1;
1735                                 break;
1736                         } else {
1737                                 edge_serial->rxPort =
1738                                     IOSP_GET_HDR_PORT(edge_serial->rxHeader1);
1739                                 edge_serial->rxBytesRemaining =
1740                                     IOSP_GET_HDR_DATA_LEN(
1741                                                 edge_serial->rxHeader1,
1742                                                 edge_serial->rxHeader2);
1743                                 dev_dbg(dev, "%s - Data for Port %u Len %u\n",
1744                                         __func__,
1745                                         edge_serial->rxPort,
1746                                         edge_serial->rxBytesRemaining);
1747
1748                                 /* ASSERT(DevExt->RxPort < DevExt->NumPorts);
1749                                  * ASSERT(DevExt->RxBytesRemaining <
1750                                  *              IOSP_MAX_DATA_LENGTH);
1751                                  */
1752
1753                                 if (bufferLength == 0) {
1754                                         edge_serial->rxState = EXPECT_DATA;
1755                                         break;
1756                                 }
1757                                 /* Else, drop through */
1758                         }
1759                 case EXPECT_DATA: /* Expect data */
1760                         if (bufferLength < edge_serial->rxBytesRemaining) {
1761                                 rxLen = bufferLength;
1762                                 /* Expect data to start next buffer */
1763                                 edge_serial->rxState = EXPECT_DATA;
1764                         } else {
1765                                 /* BufLen >= RxBytesRemaining */
1766                                 rxLen = edge_serial->rxBytesRemaining;
1767                                 /* Start another header next time */
1768                                 edge_serial->rxState = EXPECT_HDR1;
1769                         }
1770
1771                         bufferLength -= rxLen;
1772                         edge_serial->rxBytesRemaining -= rxLen;
1773
1774                         /* spit this data back into the tty driver if this
1775                            port is open */
1776                         if (rxLen && edge_serial->rxPort < serial->num_ports) {
1777                                 port = serial->port[edge_serial->rxPort];
1778                                 edge_port = usb_get_serial_port_data(port);
1779                                 if (edge_port && edge_port->open) {
1780                                         dev_dbg(dev, "%s - Sending %d bytes to TTY for port %d\n",
1781                                                 __func__, rxLen,
1782                                                 edge_serial->rxPort);
1783                                         edge_tty_recv(edge_port->port, buffer,
1784                                                         rxLen);
1785                                         edge_port->port->icount.rx += rxLen;
1786                                 }
1787                         }
1788                         buffer += rxLen;
1789                         break;
1790
1791                 case EXPECT_HDR3:       /* Expect 3rd byte of status header */
1792                         edge_serial->rxHeader3 = *buffer;
1793                         ++buffer;
1794                         --bufferLength;
1795
1796                         /* We have all the header bytes, process the
1797                            status now */
1798                         process_rcvd_status(edge_serial,
1799                                 edge_serial->rxStatusParam,
1800                                 edge_serial->rxHeader3);
1801                         edge_serial->rxState = EXPECT_HDR1;
1802                         break;
1803                 }
1804         }
1805 }
1806
1807
1808 /*****************************************************************************
1809  * process_rcvd_status
1810  *      this function handles the any status messages received on the
1811  *      bulk in pipe.
1812  *****************************************************************************/
1813 static void process_rcvd_status(struct edgeport_serial *edge_serial,
1814                                                 __u8 byte2, __u8 byte3)
1815 {
1816         struct usb_serial_port *port;
1817         struct edgeport_port *edge_port;
1818         struct tty_struct *tty;
1819         struct device *dev;
1820         __u8 code = edge_serial->rxStatusCode;
1821
1822         /* switch the port pointer to the one being currently talked about */
1823         if (edge_serial->rxPort >= edge_serial->serial->num_ports)
1824                 return;
1825         port = edge_serial->serial->port[edge_serial->rxPort];
1826         edge_port = usb_get_serial_port_data(port);
1827         if (edge_port == NULL) {
1828                 dev_err(&edge_serial->serial->dev->dev,
1829                         "%s - edge_port == NULL for port %d\n",
1830                                         __func__, edge_serial->rxPort);
1831                 return;
1832         }
1833         dev = &port->dev;
1834
1835         if (code == IOSP_EXT_STATUS) {
1836                 switch (byte2) {
1837                 case IOSP_EXT_STATUS_CHASE_RSP:
1838                         /* we want to do EXT status regardless of port
1839                          * open/closed */
1840                         dev_dbg(dev, "%s - Port %u EXT CHASE_RSP Data = %02x\n",
1841                                 __func__, edge_serial->rxPort, byte3);
1842                         /* Currently, the only EXT_STATUS is Chase, so process
1843                          * here instead of one more call to one more subroutine
1844                          * If/when more EXT_STATUS, there'll be more work to do
1845                          * Also, we currently clear flag and close the port
1846                          * regardless of content of above's Byte3.
1847                          * We could choose to do something else when Byte3 says
1848                          * Timeout on Chase from Edgeport, like wait longer in
1849                          * block_until_chase_response, but for now we don't.
1850                          */
1851                         edge_port->chaseResponsePending = false;
1852                         wake_up(&edge_port->wait_chase);
1853                         return;
1854
1855                 case IOSP_EXT_STATUS_RX_CHECK_RSP:
1856                         dev_dbg(dev, "%s ========== Port %u CHECK_RSP Sequence = %02x =============\n",
1857                                 __func__, edge_serial->rxPort, byte3);
1858                         /* Port->RxCheckRsp = true; */
1859                         return;
1860                 }
1861         }
1862
1863         if (code == IOSP_STATUS_OPEN_RSP) {
1864                 edge_port->txCredits = GET_TX_BUFFER_SIZE(byte3);
1865                 edge_port->maxTxCredits = edge_port->txCredits;
1866                 dev_dbg(dev, "%s - Port %u Open Response Initial MSR = %02x TxBufferSize = %d\n",
1867                         __func__, edge_serial->rxPort, byte2, edge_port->txCredits);
1868                 handle_new_msr(edge_port, byte2);
1869
1870                 /* send the current line settings to the port so we are
1871                    in sync with any further termios calls */
1872                 tty = tty_port_tty_get(&edge_port->port->port);
1873                 if (tty) {
1874                         change_port_settings(tty,
1875                                 edge_port, &tty->termios);
1876                         tty_kref_put(tty);
1877                 }
1878
1879                 /* we have completed the open */
1880                 edge_port->openPending = false;
1881                 edge_port->open = true;
1882                 wake_up(&edge_port->wait_open);
1883                 return;
1884         }
1885
1886         /* If port is closed, silently discard all rcvd status. We can
1887          * have cases where buffered status is received AFTER the close
1888          * port command is sent to the Edgeport.
1889          */
1890         if (!edge_port->open || edge_port->closePending)
1891                 return;
1892
1893         switch (code) {
1894         /* Not currently sent by Edgeport */
1895         case IOSP_STATUS_LSR:
1896                 dev_dbg(dev, "%s - Port %u LSR Status = %02x\n",
1897                         __func__, edge_serial->rxPort, byte2);
1898                 handle_new_lsr(edge_port, false, byte2, 0);
1899                 break;
1900
1901         case IOSP_STATUS_LSR_DATA:
1902                 dev_dbg(dev, "%s - Port %u LSR Status = %02x, Data = %02x\n",
1903                         __func__, edge_serial->rxPort, byte2, byte3);
1904                 /* byte2 is LSR Register */
1905                 /* byte3 is broken data byte */
1906                 handle_new_lsr(edge_port, true, byte2, byte3);
1907                 break;
1908         /*
1909          *      case IOSP_EXT_4_STATUS:
1910          *              dev_dbg(dev, "%s - Port %u LSR Status = %02x Data = %02x\n",
1911          *                      __func__, edge_serial->rxPort, byte2, byte3);
1912          *              break;
1913          */
1914         case IOSP_STATUS_MSR:
1915                 dev_dbg(dev, "%s - Port %u MSR Status = %02x\n",
1916                         __func__, edge_serial->rxPort, byte2);
1917                 /*
1918                  * Process this new modem status and generate appropriate
1919                  * events, etc, based on the new status. This routine
1920                  * also saves the MSR in Port->ShadowMsr.
1921                  */
1922                 handle_new_msr(edge_port, byte2);
1923                 break;
1924
1925         default:
1926                 dev_dbg(dev, "%s - Unrecognized IOSP status code %u\n", __func__, code);
1927                 break;
1928         }
1929 }
1930
1931
1932 /*****************************************************************************
1933  * edge_tty_recv
1934  *      this function passes data on to the tty flip buffer
1935  *****************************************************************************/
1936 static void edge_tty_recv(struct usb_serial_port *port, unsigned char *data,
1937                 int length)
1938 {
1939         int cnt;
1940
1941         cnt = tty_insert_flip_string(&port->port, data, length);
1942         if (cnt < length) {
1943                 dev_err(&port->dev, "%s - dropping data, %d bytes lost\n",
1944                                 __func__, length - cnt);
1945         }
1946         data += cnt;
1947         length -= cnt;
1948
1949         tty_flip_buffer_push(&port->port);
1950 }
1951
1952
1953 /*****************************************************************************
1954  * handle_new_msr
1955  *      this function handles any change to the msr register for a port.
1956  *****************************************************************************/
1957 static void handle_new_msr(struct edgeport_port *edge_port, __u8 newMsr)
1958 {
1959         struct  async_icount *icount;
1960
1961         if (newMsr & (EDGEPORT_MSR_DELTA_CTS | EDGEPORT_MSR_DELTA_DSR |
1962                         EDGEPORT_MSR_DELTA_RI | EDGEPORT_MSR_DELTA_CD)) {
1963                 icount = &edge_port->port->icount;
1964
1965                 /* update input line counters */
1966                 if (newMsr & EDGEPORT_MSR_DELTA_CTS)
1967                         icount->cts++;
1968                 if (newMsr & EDGEPORT_MSR_DELTA_DSR)
1969                         icount->dsr++;
1970                 if (newMsr & EDGEPORT_MSR_DELTA_CD)
1971                         icount->dcd++;
1972                 if (newMsr & EDGEPORT_MSR_DELTA_RI)
1973                         icount->rng++;
1974                 wake_up_interruptible(&edge_port->port->port.delta_msr_wait);
1975         }
1976
1977         /* Save the new modem status */
1978         edge_port->shadowMSR = newMsr & 0xf0;
1979 }
1980
1981
1982 /*****************************************************************************
1983  * handle_new_lsr
1984  *      this function handles any change to the lsr register for a port.
1985  *****************************************************************************/
1986 static void handle_new_lsr(struct edgeport_port *edge_port, __u8 lsrData,
1987                                                         __u8 lsr, __u8 data)
1988 {
1989         __u8 newLsr = (__u8) (lsr & (__u8)
1990                 (LSR_OVER_ERR | LSR_PAR_ERR | LSR_FRM_ERR | LSR_BREAK));
1991         struct async_icount *icount;
1992
1993         edge_port->shadowLSR = lsr;
1994
1995         if (newLsr & LSR_BREAK) {
1996                 /*
1997                  * Parity and Framing errors only count if they
1998                  * occur exclusive of a break being
1999                  * received.
2000                  */
2001                 newLsr &= (__u8)(LSR_OVER_ERR | LSR_BREAK);
2002         }
2003
2004         /* Place LSR data byte into Rx buffer */
2005         if (lsrData)
2006                 edge_tty_recv(edge_port->port, &data, 1);
2007
2008         /* update input line counters */
2009         icount = &edge_port->port->icount;
2010         if (newLsr & LSR_BREAK)
2011                 icount->brk++;
2012         if (newLsr & LSR_OVER_ERR)
2013                 icount->overrun++;
2014         if (newLsr & LSR_PAR_ERR)
2015                 icount->parity++;
2016         if (newLsr & LSR_FRM_ERR)
2017                 icount->frame++;
2018 }
2019
2020
2021 /****************************************************************************
2022  * sram_write
2023  *      writes a number of bytes to the Edgeport device's sram starting at the
2024  *      given address.
2025  *      If successful returns the number of bytes written, otherwise it returns
2026  *      a negative error number of the problem.
2027  ****************************************************************************/
2028 static int sram_write(struct usb_serial *serial, __u16 extAddr, __u16 addr,
2029                                         __u16 length, const __u8 *data)
2030 {
2031         int result;
2032         __u16 current_length;
2033         unsigned char *transfer_buffer;
2034
2035         dev_dbg(&serial->dev->dev, "%s - %x, %x, %d\n", __func__, extAddr, addr, length);
2036
2037         transfer_buffer =  kmalloc(64, GFP_KERNEL);
2038         if (!transfer_buffer)
2039                 return -ENOMEM;
2040
2041         /* need to split these writes up into 64 byte chunks */
2042         result = 0;
2043         while (length > 0) {
2044                 if (length > 64)
2045                         current_length = 64;
2046                 else
2047                         current_length = length;
2048
2049 /*              dev_dbg(&serial->dev->dev, "%s - writing %x, %x, %d\n", __func__, extAddr, addr, current_length); */
2050                 memcpy(transfer_buffer, data, current_length);
2051                 result = usb_control_msg(serial->dev,
2052                                         usb_sndctrlpipe(serial->dev, 0),
2053                                         USB_REQUEST_ION_WRITE_RAM,
2054                                         0x40, addr, extAddr, transfer_buffer,
2055                                         current_length, 300);
2056                 if (result < 0)
2057                         break;
2058                 length -= current_length;
2059                 addr += current_length;
2060                 data += current_length;
2061         }
2062
2063         kfree(transfer_buffer);
2064         return result;
2065 }
2066
2067
2068 /****************************************************************************
2069  * rom_write
2070  *      writes a number of bytes to the Edgeport device's ROM starting at the
2071  *      given address.
2072  *      If successful returns the number of bytes written, otherwise it returns
2073  *      a negative error number of the problem.
2074  ****************************************************************************/
2075 static int rom_write(struct usb_serial *serial, __u16 extAddr, __u16 addr,
2076                                         __u16 length, const __u8 *data)
2077 {
2078         int result;
2079         __u16 current_length;
2080         unsigned char *transfer_buffer;
2081
2082         transfer_buffer =  kmalloc(64, GFP_KERNEL);
2083         if (!transfer_buffer)
2084                 return -ENOMEM;
2085
2086         /* need to split these writes up into 64 byte chunks */
2087         result = 0;
2088         while (length > 0) {
2089                 if (length > 64)
2090                         current_length = 64;
2091                 else
2092                         current_length = length;
2093                 memcpy(transfer_buffer, data, current_length);
2094                 result = usb_control_msg(serial->dev,
2095                                         usb_sndctrlpipe(serial->dev, 0),
2096                                         USB_REQUEST_ION_WRITE_ROM, 0x40,
2097                                         addr, extAddr,
2098                                         transfer_buffer, current_length, 300);
2099                 if (result < 0)
2100                         break;
2101                 length -= current_length;
2102                 addr += current_length;
2103                 data += current_length;
2104         }
2105
2106         kfree(transfer_buffer);
2107         return result;
2108 }
2109
2110
2111 /****************************************************************************
2112  * rom_read
2113  *      reads a number of bytes from the Edgeport device starting at the given
2114  *      address.
2115  *      Returns zero on success or a negative error number.
2116  ****************************************************************************/
2117 static int rom_read(struct usb_serial *serial, __u16 extAddr,
2118                                         __u16 addr, __u16 length, __u8 *data)
2119 {
2120         int result;
2121         __u16 current_length;
2122         unsigned char *transfer_buffer;
2123
2124         transfer_buffer =  kmalloc(64, GFP_KERNEL);
2125         if (!transfer_buffer)
2126                 return -ENOMEM;
2127
2128         /* need to split these reads up into 64 byte chunks */
2129         result = 0;
2130         while (length > 0) {
2131                 if (length > 64)
2132                         current_length = 64;
2133                 else
2134                         current_length = length;
2135                 result = usb_control_msg(serial->dev,
2136                                         usb_rcvctrlpipe(serial->dev, 0),
2137                                         USB_REQUEST_ION_READ_ROM,
2138                                         0xC0, addr, extAddr, transfer_buffer,
2139                                         current_length, 300);
2140                 if (result < current_length) {
2141                         if (result >= 0)
2142                                 result = -EIO;
2143                         break;
2144                 }
2145                 memcpy(data, transfer_buffer, current_length);
2146                 length -= current_length;
2147                 addr += current_length;
2148                 data += current_length;
2149
2150                 result = 0;
2151         }
2152
2153         kfree(transfer_buffer);
2154         return result;
2155 }
2156
2157
2158 /****************************************************************************
2159  * send_iosp_ext_cmd
2160  *      Is used to send a IOSP message to the Edgeport device
2161  ****************************************************************************/
2162 static int send_iosp_ext_cmd(struct edgeport_port *edge_port,
2163                                                 __u8 command, __u8 param)
2164 {
2165         unsigned char   *buffer;
2166         unsigned char   *currentCommand;
2167         int             length = 0;
2168         int             status = 0;
2169
2170         buffer = kmalloc(10, GFP_ATOMIC);
2171         if (!buffer)
2172                 return -ENOMEM;
2173
2174         currentCommand = buffer;
2175
2176         MAKE_CMD_EXT_CMD(&currentCommand, &length, edge_port->port->port_number,
2177                          command, param);
2178
2179         status = write_cmd_usb(edge_port, buffer, length);
2180         if (status) {
2181                 /* something bad happened, let's free up the memory */
2182                 kfree(buffer);
2183         }
2184
2185         return status;
2186 }
2187
2188
2189 /*****************************************************************************
2190  * write_cmd_usb
2191  *      this function writes the given buffer out to the bulk write endpoint.
2192  *****************************************************************************/
2193 static int write_cmd_usb(struct edgeport_port *edge_port,
2194                                         unsigned char *buffer, int length)
2195 {
2196         struct edgeport_serial *edge_serial =
2197                                 usb_get_serial_data(edge_port->port->serial);
2198         struct device *dev = &edge_port->port->dev;
2199         int status = 0;
2200         struct urb *urb;
2201
2202         usb_serial_debug_data(dev, __func__, length, buffer);
2203
2204         /* Allocate our next urb */
2205         urb = usb_alloc_urb(0, GFP_ATOMIC);
2206         if (!urb)
2207                 return -ENOMEM;
2208
2209         atomic_inc(&CmdUrbs);
2210         dev_dbg(dev, "%s - ALLOCATE URB %p (outstanding %d)\n",
2211                 __func__, urb, atomic_read(&CmdUrbs));
2212
2213         usb_fill_bulk_urb(urb, edge_serial->serial->dev,
2214                         usb_sndbulkpipe(edge_serial->serial->dev,
2215                                         edge_serial->bulk_out_endpoint),
2216                         buffer, length, edge_bulk_out_cmd_callback, edge_port);
2217
2218         edge_port->commandPending = true;
2219         status = usb_submit_urb(urb, GFP_ATOMIC);
2220
2221         if (status) {
2222                 /* something went wrong */
2223                 dev_err(dev, "%s - usb_submit_urb(write command) failed, status = %d\n",
2224                         __func__, status);
2225                 usb_free_urb(urb);
2226                 atomic_dec(&CmdUrbs);
2227                 return status;
2228         }
2229
2230 #if 0
2231         wait_event(&edge_port->wait_command, !edge_port->commandPending);
2232
2233         if (edge_port->commandPending) {
2234                 /* command timed out */
2235                 dev_dbg(dev, "%s - command timed out\n", __func__);
2236                 status = -EINVAL;
2237         }
2238 #endif
2239         return status;
2240 }
2241
2242
2243 /*****************************************************************************
2244  * send_cmd_write_baud_rate
2245  *      this function sends the proper command to change the baud rate of the
2246  *      specified port.
2247  *****************************************************************************/
2248 static int send_cmd_write_baud_rate(struct edgeport_port *edge_port,
2249                                                                 int baudRate)
2250 {
2251         struct edgeport_serial *edge_serial =
2252                                 usb_get_serial_data(edge_port->port->serial);
2253         struct device *dev = &edge_port->port->dev;
2254         unsigned char *cmdBuffer;
2255         unsigned char *currCmd;
2256         int cmdLen = 0;
2257         int divisor;
2258         int status;
2259         u32 number = edge_port->port->port_number;
2260
2261         if (edge_serial->is_epic &&
2262             !edge_serial->epic_descriptor.Supports.IOSPSetBaudRate) {
2263                 dev_dbg(dev, "SendCmdWriteBaudRate - NOT Setting baud rate for port, baud = %d\n",
2264                         baudRate);
2265                 return 0;
2266         }
2267
2268         dev_dbg(dev, "%s - baud = %d\n", __func__, baudRate);
2269
2270         status = calc_baud_rate_divisor(dev, baudRate, &divisor);
2271         if (status) {
2272                 dev_err(dev, "%s - bad baud rate\n", __func__);
2273                 return status;
2274         }
2275
2276         /* Alloc memory for the string of commands. */
2277         cmdBuffer =  kmalloc(0x100, GFP_ATOMIC);
2278         if (!cmdBuffer)
2279                 return -ENOMEM;
2280
2281         currCmd = cmdBuffer;
2282
2283         /* Enable access to divisor latch */
2284         MAKE_CMD_WRITE_REG(&currCmd, &cmdLen, number, LCR, LCR_DL_ENABLE);
2285
2286         /* Write the divisor itself */
2287         MAKE_CMD_WRITE_REG(&currCmd, &cmdLen, number, DLL, LOW8(divisor));
2288         MAKE_CMD_WRITE_REG(&currCmd, &cmdLen, number, DLM, HIGH8(divisor));
2289
2290         /* Restore original value to disable access to divisor latch */
2291         MAKE_CMD_WRITE_REG(&currCmd, &cmdLen, number, LCR,
2292                                                 edge_port->shadowLCR);
2293
2294         status = write_cmd_usb(edge_port, cmdBuffer, cmdLen);
2295         if (status) {
2296                 /* something bad happened, let's free up the memory */
2297                 kfree(cmdBuffer);
2298         }
2299
2300         return status;
2301 }
2302
2303
2304 /*****************************************************************************
2305  * calc_baud_rate_divisor
2306  *      this function calculates the proper baud rate divisor for the specified
2307  *      baud rate.
2308  *****************************************************************************/
2309 static int calc_baud_rate_divisor(struct device *dev, int baudrate, int *divisor)
2310 {
2311         int i;
2312         __u16 custom;
2313
2314         for (i = 0; i < ARRAY_SIZE(divisor_table); i++) {
2315                 if (divisor_table[i].BaudRate == baudrate) {
2316                         *divisor = divisor_table[i].Divisor;
2317                         return 0;
2318                 }
2319         }
2320
2321         /* We have tried all of the standard baud rates
2322          * lets try to calculate the divisor for this baud rate
2323          * Make sure the baud rate is reasonable */
2324         if (baudrate > 50 && baudrate < 230400) {
2325                 /* get divisor */
2326                 custom = (__u16)((230400L + baudrate/2) / baudrate);
2327
2328                 *divisor = custom;
2329
2330                 dev_dbg(dev, "%s - Baud %d = %d\n", __func__, baudrate, custom);
2331                 return 0;
2332         }
2333
2334         return -1;
2335 }
2336
2337
2338 /*****************************************************************************
2339  * send_cmd_write_uart_register
2340  *  this function builds up a uart register message and sends to the device.
2341  *****************************************************************************/
2342 static int send_cmd_write_uart_register(struct edgeport_port *edge_port,
2343                                                 __u8 regNum, __u8 regValue)
2344 {
2345         struct edgeport_serial *edge_serial =
2346                                 usb_get_serial_data(edge_port->port->serial);
2347         struct device *dev = &edge_port->port->dev;
2348         unsigned char *cmdBuffer;
2349         unsigned char *currCmd;
2350         unsigned long cmdLen = 0;
2351         int status;
2352
2353         dev_dbg(dev, "%s - write to %s register 0x%02x\n",
2354                 (regNum == MCR) ? "MCR" : "LCR", __func__, regValue);
2355
2356         if (edge_serial->is_epic &&
2357             !edge_serial->epic_descriptor.Supports.IOSPWriteMCR &&
2358             regNum == MCR) {
2359                 dev_dbg(dev, "SendCmdWriteUartReg - Not writing to MCR Register\n");
2360                 return 0;
2361         }
2362
2363         if (edge_serial->is_epic &&
2364             !edge_serial->epic_descriptor.Supports.IOSPWriteLCR &&
2365             regNum == LCR) {
2366                 dev_dbg(dev, "SendCmdWriteUartReg - Not writing to LCR Register\n");
2367                 return 0;
2368         }
2369
2370         /* Alloc memory for the string of commands. */
2371         cmdBuffer = kmalloc(0x10, GFP_ATOMIC);
2372         if (cmdBuffer == NULL)
2373                 return -ENOMEM;
2374
2375         currCmd = cmdBuffer;
2376
2377         /* Build a cmd in the buffer to write the given register */
2378         MAKE_CMD_WRITE_REG(&currCmd, &cmdLen, edge_port->port->port_number,
2379                            regNum, regValue);
2380
2381         status = write_cmd_usb(edge_port, cmdBuffer, cmdLen);
2382         if (status) {
2383                 /* something bad happened, let's free up the memory */
2384                 kfree(cmdBuffer);
2385         }
2386
2387         return status;
2388 }
2389
2390
2391 /*****************************************************************************
2392  * change_port_settings
2393  *      This routine is called to set the UART on the device to match the
2394  *      specified new settings.
2395  *****************************************************************************/
2396
2397 static void change_port_settings(struct tty_struct *tty,
2398         struct edgeport_port *edge_port, struct ktermios *old_termios)
2399 {
2400         struct device *dev = &edge_port->port->dev;
2401         struct edgeport_serial *edge_serial =
2402                         usb_get_serial_data(edge_port->port->serial);
2403         int baud;
2404         unsigned cflag;
2405         __u8 mask = 0xff;
2406         __u8 lData;
2407         __u8 lParity;
2408         __u8 lStop;
2409         __u8 rxFlow;
2410         __u8 txFlow;
2411         int status;
2412
2413         if (!edge_port->open &&
2414             !edge_port->openPending) {
2415                 dev_dbg(dev, "%s - port not opened\n", __func__);
2416                 return;
2417         }
2418
2419         cflag = tty->termios.c_cflag;
2420
2421         switch (cflag & CSIZE) {
2422         case CS5:
2423                 lData = LCR_BITS_5; mask = 0x1f;
2424                 dev_dbg(dev, "%s - data bits = 5\n", __func__);
2425                 break;
2426         case CS6:
2427                 lData = LCR_BITS_6; mask = 0x3f;
2428                 dev_dbg(dev, "%s - data bits = 6\n", __func__);
2429                 break;
2430         case CS7:
2431                 lData = LCR_BITS_7; mask = 0x7f;
2432                 dev_dbg(dev, "%s - data bits = 7\n", __func__);
2433                 break;
2434         default:
2435         case CS8:
2436                 lData = LCR_BITS_8;
2437                 dev_dbg(dev, "%s - data bits = 8\n", __func__);
2438                 break;
2439         }
2440
2441         lParity = LCR_PAR_NONE;
2442         if (cflag & PARENB) {
2443                 if (cflag & CMSPAR) {
2444                         if (cflag & PARODD) {
2445                                 lParity = LCR_PAR_MARK;
2446                                 dev_dbg(dev, "%s - parity = mark\n", __func__);
2447                         } else {
2448                                 lParity = LCR_PAR_SPACE;
2449                                 dev_dbg(dev, "%s - parity = space\n", __func__);
2450                         }
2451                 } else if (cflag & PARODD) {
2452                         lParity = LCR_PAR_ODD;
2453                         dev_dbg(dev, "%s - parity = odd\n", __func__);
2454                 } else {
2455                         lParity = LCR_PAR_EVEN;
2456                         dev_dbg(dev, "%s - parity = even\n", __func__);
2457                 }
2458         } else {
2459                 dev_dbg(dev, "%s - parity = none\n", __func__);
2460         }
2461
2462         if (cflag & CSTOPB) {
2463                 lStop = LCR_STOP_2;
2464                 dev_dbg(dev, "%s - stop bits = 2\n", __func__);
2465         } else {
2466                 lStop = LCR_STOP_1;
2467                 dev_dbg(dev, "%s - stop bits = 1\n", __func__);
2468         }
2469
2470         /* figure out the flow control settings */
2471         rxFlow = txFlow = 0x00;
2472         if (cflag & CRTSCTS) {
2473                 rxFlow |= IOSP_RX_FLOW_RTS;
2474                 txFlow |= IOSP_TX_FLOW_CTS;
2475                 dev_dbg(dev, "%s - RTS/CTS is enabled\n", __func__);
2476         } else {
2477                 dev_dbg(dev, "%s - RTS/CTS is disabled\n", __func__);
2478         }
2479
2480         /* if we are implementing XON/XOFF, set the start and stop character
2481            in the device */
2482         if (I_IXOFF(tty) || I_IXON(tty)) {
2483                 unsigned char stop_char  = STOP_CHAR(tty);
2484                 unsigned char start_char = START_CHAR(tty);
2485
2486                 if (!edge_serial->is_epic ||
2487                     edge_serial->epic_descriptor.Supports.IOSPSetXChar) {
2488                         send_iosp_ext_cmd(edge_port,
2489                                         IOSP_CMD_SET_XON_CHAR, start_char);
2490                         send_iosp_ext_cmd(edge_port,
2491                                         IOSP_CMD_SET_XOFF_CHAR, stop_char);
2492                 }
2493
2494                 /* if we are implementing INBOUND XON/XOFF */
2495                 if (I_IXOFF(tty)) {
2496                         rxFlow |= IOSP_RX_FLOW_XON_XOFF;
2497                         dev_dbg(dev, "%s - INBOUND XON/XOFF is enabled, XON = %2x, XOFF = %2x\n",
2498                                 __func__, start_char, stop_char);
2499                 } else {
2500                         dev_dbg(dev, "%s - INBOUND XON/XOFF is disabled\n", __func__);
2501                 }
2502
2503                 /* if we are implementing OUTBOUND XON/XOFF */
2504                 if (I_IXON(tty)) {
2505                         txFlow |= IOSP_TX_FLOW_XON_XOFF;
2506                         dev_dbg(dev, "%s - OUTBOUND XON/XOFF is enabled, XON = %2x, XOFF = %2x\n",
2507                                 __func__, start_char, stop_char);
2508                 } else {
2509                         dev_dbg(dev, "%s - OUTBOUND XON/XOFF is disabled\n", __func__);
2510                 }
2511         }
2512
2513         /* Set flow control to the configured value */
2514         if (!edge_serial->is_epic ||
2515             edge_serial->epic_descriptor.Supports.IOSPSetRxFlow)
2516                 send_iosp_ext_cmd(edge_port, IOSP_CMD_SET_RX_FLOW, rxFlow);
2517         if (!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 = "/*(DEBLOBBED)*/";
2705                         break;
2706
2707                 case EDGE_DOWNLOAD_FILE_80251:
2708                         fw_info = "downloading firmware version (80251)";
2709                         fw_name = "/*(DEBLOBBED)*/";
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 = reject_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                         goto error;
2963                 }
2964
2965                 /* start interrupt read for this edgeport this interrupt will
2966                  * continue as long as the edgeport is connected */
2967                 response = usb_submit_urb(edge_serial->interrupt_read_urb,
2968                                                                 GFP_KERNEL);
2969                 if (response) {
2970                         dev_err(ddev, "%s - Error %d submitting control urb\n",
2971                                 __func__, response);
2972
2973                         goto error;
2974                 }
2975         }
2976         return response;
2977
2978 error:
2979         usb_free_urb(edge_serial->interrupt_read_urb);
2980         kfree(edge_serial->interrupt_in_buffer);
2981
2982         usb_free_urb(edge_serial->read_urb);
2983         kfree(edge_serial->bulk_in_buffer);
2984
2985         kfree(edge_serial);
2986
2987         return response;
2988 }
2989
2990
2991 /****************************************************************************
2992  * edge_disconnect
2993  *      This function is called whenever the device is removed from the usb bus.
2994  ****************************************************************************/
2995 static void edge_disconnect(struct usb_serial *serial)
2996 {
2997         struct edgeport_serial *edge_serial = usb_get_serial_data(serial);
2998
2999         if (edge_serial->is_epic) {
3000                 usb_kill_urb(edge_serial->interrupt_read_urb);
3001                 usb_kill_urb(edge_serial->read_urb);
3002         }
3003 }
3004
3005
3006 /****************************************************************************
3007  * edge_release
3008  *      This function is called when the device structure is deallocated.
3009  ****************************************************************************/
3010 static void edge_release(struct usb_serial *serial)
3011 {
3012         struct edgeport_serial *edge_serial = usb_get_serial_data(serial);
3013
3014         if (edge_serial->is_epic) {
3015                 usb_kill_urb(edge_serial->interrupt_read_urb);
3016                 usb_free_urb(edge_serial->interrupt_read_urb);
3017                 kfree(edge_serial->interrupt_in_buffer);
3018
3019                 usb_kill_urb(edge_serial->read_urb);
3020                 usb_free_urb(edge_serial->read_urb);
3021                 kfree(edge_serial->bulk_in_buffer);
3022         }
3023
3024         kfree(edge_serial);
3025 }
3026
3027 static int edge_port_probe(struct usb_serial_port *port)
3028 {
3029         struct edgeport_port *edge_port;
3030
3031         edge_port = kzalloc(sizeof(*edge_port), GFP_KERNEL);
3032         if (!edge_port)
3033                 return -ENOMEM;
3034
3035         spin_lock_init(&edge_port->ep_lock);
3036         edge_port->port = port;
3037
3038         usb_set_serial_port_data(port, edge_port);
3039
3040         return 0;
3041 }
3042
3043 static int edge_port_remove(struct usb_serial_port *port)
3044 {
3045         struct edgeport_port *edge_port;
3046
3047         edge_port = usb_get_serial_port_data(port);
3048         kfree(edge_port);
3049
3050         return 0;
3051 }
3052
3053 module_usb_serial_driver(serial_drivers, id_table_combined);
3054
3055 MODULE_AUTHOR(DRIVER_AUTHOR);
3056 MODULE_DESCRIPTION(DRIVER_DESC);
3057 MODULE_LICENSE("GPL");
3058 /*(DEBLOBBED)*/