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->is_epic) &&
1068              (edge_serial->epic_descriptor.Supports.IOSPChase))) {
1069                 /* flush and chase */
1070                 edge_port->chaseResponsePending = true;
1071
1072                 dev_dbg(&port->dev, "%s - Sending IOSP_CMD_CHASE_PORT\n", __func__);
1073                 status = send_iosp_ext_cmd(edge_port, IOSP_CMD_CHASE_PORT, 0);
1074                 if (status == 0)
1075                         /* block until chase finished */
1076                         block_until_chase_response(edge_port);
1077                 else
1078                         edge_port->chaseResponsePending = false;
1079         }
1080
1081         if ((!edge_serial->is_epic) ||
1082             ((edge_serial->is_epic) &&
1083              (edge_serial->epic_descriptor.Supports.IOSPClose))) {
1084                /* close the port */
1085                 dev_dbg(&port->dev, "%s - Sending IOSP_CMD_CLOSE_PORT\n", __func__);
1086                 send_iosp_ext_cmd(edge_port, IOSP_CMD_CLOSE_PORT, 0);
1087         }
1088
1089         /* port->close = true; */
1090         edge_port->closePending = false;
1091         edge_port->open = false;
1092         edge_port->openPending = false;
1093
1094         usb_kill_urb(edge_port->write_urb);
1095
1096         if (edge_port->write_urb) {
1097                 /* if this urb had a transfer buffer already
1098                                 (old transfer) free it */
1099                 kfree(edge_port->write_urb->transfer_buffer);
1100                 usb_free_urb(edge_port->write_urb);
1101                 edge_port->write_urb = NULL;
1102         }
1103         kfree(edge_port->txfifo.fifo);
1104         edge_port->txfifo.fifo = NULL;
1105 }
1106
1107 /*****************************************************************************
1108  * SerialWrite
1109  *      this function is called by the tty driver when data should be written
1110  *      to the port.
1111  *      If successful, we return the number of bytes written, otherwise we
1112  *      return a negative error number.
1113  *****************************************************************************/
1114 static int edge_write(struct tty_struct *tty, struct usb_serial_port *port,
1115                                         const unsigned char *data, int count)
1116 {
1117         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1118         struct TxFifo *fifo;
1119         int copySize;
1120         int bytesleft;
1121         int firsthalf;
1122         int secondhalf;
1123         unsigned long flags;
1124
1125         if (edge_port == NULL)
1126                 return -ENODEV;
1127
1128         /* get a pointer to the Tx fifo */
1129         fifo = &edge_port->txfifo;
1130
1131         spin_lock_irqsave(&edge_port->ep_lock, flags);
1132
1133         /* calculate number of bytes to put in fifo */
1134         copySize = min((unsigned int)count,
1135                                 (edge_port->txCredits - fifo->count));
1136
1137         dev_dbg(&port->dev, "%s of %d byte(s) Fifo room  %d -- will copy %d bytes\n",
1138                 __func__, count, edge_port->txCredits - fifo->count, copySize);
1139
1140         /* catch writes of 0 bytes which the tty driver likes to give us,
1141            and when txCredits is empty */
1142         if (copySize == 0) {
1143                 dev_dbg(&port->dev, "%s - copySize = Zero\n", __func__);
1144                 goto finish_write;
1145         }
1146
1147         /* queue the data
1148          * since we can never overflow the buffer we do not have to check for a
1149          * full condition
1150          *
1151          * the copy is done is two parts -- first fill to the end of the buffer
1152          * then copy the reset from the start of the buffer
1153          */
1154         bytesleft = fifo->size - fifo->head;
1155         firsthalf = min(bytesleft, copySize);
1156         dev_dbg(&port->dev, "%s - copy %d bytes of %d into fifo \n", __func__,
1157                 firsthalf, bytesleft);
1158
1159         /* now copy our data */
1160         memcpy(&fifo->fifo[fifo->head], data, firsthalf);
1161         usb_serial_debug_data(&port->dev, __func__, firsthalf, &fifo->fifo[fifo->head]);
1162
1163         /* update the index and size */
1164         fifo->head  += firsthalf;
1165         fifo->count += firsthalf;
1166
1167         /* wrap the index */
1168         if (fifo->head == fifo->size)
1169                 fifo->head = 0;
1170
1171         secondhalf = copySize-firsthalf;
1172
1173         if (secondhalf) {
1174                 dev_dbg(&port->dev, "%s - copy rest of data %d\n", __func__, secondhalf);
1175                 memcpy(&fifo->fifo[fifo->head], &data[firsthalf], secondhalf);
1176                 usb_serial_debug_data(&port->dev, __func__, secondhalf, &fifo->fifo[fifo->head]);
1177                 /* update the index and size */
1178                 fifo->count += secondhalf;
1179                 fifo->head  += secondhalf;
1180                 /* No need to check for wrap since we can not get to end of
1181                  * the fifo in this part
1182                  */
1183         }
1184
1185 finish_write:
1186         spin_unlock_irqrestore(&edge_port->ep_lock, flags);
1187
1188         send_more_port_data((struct edgeport_serial *)
1189                         usb_get_serial_data(port->serial), edge_port);
1190
1191         dev_dbg(&port->dev, "%s wrote %d byte(s) TxCredits %d, Fifo %d\n",
1192                 __func__, copySize, edge_port->txCredits, fifo->count);
1193
1194         return copySize;
1195 }
1196
1197
1198 /************************************************************************
1199  *
1200  * send_more_port_data()
1201  *
1202  *      This routine attempts to write additional UART transmit data
1203  *      to a port over the USB bulk pipe. It is called (1) when new
1204  *      data has been written to a port's TxBuffer from higher layers
1205  *      (2) when the peripheral sends us additional TxCredits indicating
1206  *      that it can accept more Tx data for a given port; and (3) when
1207  *      a bulk write completes successfully and we want to see if we
1208  *      can transmit more.
1209  *
1210  ************************************************************************/
1211 static void send_more_port_data(struct edgeport_serial *edge_serial,
1212                                         struct edgeport_port *edge_port)
1213 {
1214         struct TxFifo   *fifo = &edge_port->txfifo;
1215         struct device   *dev = &edge_port->port->dev;
1216         struct urb      *urb;
1217         unsigned char   *buffer;
1218         int             status;
1219         int             count;
1220         int             bytesleft;
1221         int             firsthalf;
1222         int             secondhalf;
1223         unsigned long   flags;
1224
1225         spin_lock_irqsave(&edge_port->ep_lock, flags);
1226
1227         if (edge_port->write_in_progress ||
1228             !edge_port->open             ||
1229             (fifo->count == 0)) {
1230                 dev_dbg(dev, "%s EXIT - fifo %d, PendingWrite = %d\n",
1231                         __func__, fifo->count, edge_port->write_in_progress);
1232                 goto exit_send;
1233         }
1234
1235         /* since the amount of data in the fifo will always fit into the
1236          * edgeport buffer we do not need to check the write length
1237          *
1238          * Do we have enough credits for this port to make it worthwhile
1239          * to bother queueing a write. If it's too small, say a few bytes,
1240          * it's better to wait for more credits so we can do a larger write.
1241          */
1242         if (edge_port->txCredits < EDGE_FW_GET_TX_CREDITS_SEND_THRESHOLD(edge_port->maxTxCredits, EDGE_FW_BULK_MAX_PACKET_SIZE)) {
1243                 dev_dbg(dev, "%s Not enough credit - fifo %d TxCredit %d\n",
1244                         __func__, fifo->count, edge_port->txCredits);
1245                 goto exit_send;
1246         }
1247
1248         /* lock this write */
1249         edge_port->write_in_progress = true;
1250
1251         /* get a pointer to the write_urb */
1252         urb = edge_port->write_urb;
1253
1254         /* make sure transfer buffer is freed */
1255         kfree(urb->transfer_buffer);
1256         urb->transfer_buffer = NULL;
1257
1258         /* build the data header for the buffer and port that we are about
1259            to send out */
1260         count = fifo->count;
1261         buffer = kmalloc(count+2, GFP_ATOMIC);
1262         if (!buffer) {
1263                 edge_port->write_in_progress = false;
1264                 goto exit_send;
1265         }
1266         buffer[0] = IOSP_BUILD_DATA_HDR1(edge_port->port->port_number, count);
1267         buffer[1] = IOSP_BUILD_DATA_HDR2(edge_port->port->port_number, count);
1268
1269         /* now copy our data */
1270         bytesleft =  fifo->size - fifo->tail;
1271         firsthalf = min(bytesleft, count);
1272         memcpy(&buffer[2], &fifo->fifo[fifo->tail], firsthalf);
1273         fifo->tail  += firsthalf;
1274         fifo->count -= firsthalf;
1275         if (fifo->tail == fifo->size)
1276                 fifo->tail = 0;
1277
1278         secondhalf = count-firsthalf;
1279         if (secondhalf) {
1280                 memcpy(&buffer[2+firsthalf], &fifo->fifo[fifo->tail],
1281                                                                 secondhalf);
1282                 fifo->tail  += secondhalf;
1283                 fifo->count -= secondhalf;
1284         }
1285
1286         if (count)
1287                 usb_serial_debug_data(&edge_port->port->dev, __func__, count, &buffer[2]);
1288
1289         /* fill up the urb with all of our data and submit it */
1290         usb_fill_bulk_urb(urb, edge_serial->serial->dev,
1291                         usb_sndbulkpipe(edge_serial->serial->dev,
1292                                         edge_serial->bulk_out_endpoint),
1293                         buffer, count+2,
1294                         edge_bulk_out_data_callback, edge_port);
1295
1296         /* decrement the number of credits we have by the number we just sent */
1297         edge_port->txCredits -= count;
1298         edge_port->port->icount.tx += count;
1299
1300         status = usb_submit_urb(urb, GFP_ATOMIC);
1301         if (status) {
1302                 /* something went wrong */
1303                 dev_err_console(edge_port->port,
1304                         "%s - usb_submit_urb(write bulk) failed, status = %d, data lost\n",
1305                                 __func__, status);
1306                 edge_port->write_in_progress = false;
1307
1308                 /* revert the credits as something bad happened. */
1309                 edge_port->txCredits += count;
1310                 edge_port->port->icount.tx -= count;
1311         }
1312         dev_dbg(dev, "%s wrote %d byte(s) TxCredit %d, Fifo %d\n",
1313                 __func__, count, edge_port->txCredits, fifo->count);
1314
1315 exit_send:
1316         spin_unlock_irqrestore(&edge_port->ep_lock, flags);
1317 }
1318
1319
1320 /*****************************************************************************
1321  * edge_write_room
1322  *      this function is called by the tty driver when it wants to know how
1323  *      many bytes of data we can accept for a specific port. If successful,
1324  *      we return the amount of room that we have for this port (the txCredits)
1325  *      otherwise we return a negative error number.
1326  *****************************************************************************/
1327 static int edge_write_room(struct tty_struct *tty)
1328 {
1329         struct usb_serial_port *port = tty->driver_data;
1330         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1331         int room;
1332         unsigned long flags;
1333
1334         if (edge_port == NULL)
1335                 return 0;
1336         if (edge_port->closePending)
1337                 return 0;
1338
1339         if (!edge_port->open) {
1340                 dev_dbg(&port->dev, "%s - port not opened\n", __func__);
1341                 return 0;
1342         }
1343
1344         /* total of both buffers is still txCredit */
1345         spin_lock_irqsave(&edge_port->ep_lock, flags);
1346         room = edge_port->txCredits - edge_port->txfifo.count;
1347         spin_unlock_irqrestore(&edge_port->ep_lock, flags);
1348
1349         dev_dbg(&port->dev, "%s - returns %d\n", __func__, room);
1350         return room;
1351 }
1352
1353
1354 /*****************************************************************************
1355  * edge_chars_in_buffer
1356  *      this function is called by the tty driver when it wants to know how
1357  *      many bytes of data we currently have outstanding in the port (data that
1358  *      has been written, but hasn't made it out the port yet)
1359  *      If successful, we return the number of bytes left to be written in the
1360  *      system,
1361  *      Otherwise we return a negative error number.
1362  *****************************************************************************/
1363 static int edge_chars_in_buffer(struct tty_struct *tty)
1364 {
1365         struct usb_serial_port *port = tty->driver_data;
1366         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1367         int num_chars;
1368         unsigned long flags;
1369
1370         if (edge_port == NULL)
1371                 return 0;
1372         if (edge_port->closePending)
1373                 return 0;
1374
1375         if (!edge_port->open) {
1376                 dev_dbg(&port->dev, "%s - port not opened\n", __func__);
1377                 return 0;
1378         }
1379
1380         spin_lock_irqsave(&edge_port->ep_lock, flags);
1381         num_chars = edge_port->maxTxCredits - edge_port->txCredits +
1382                                                 edge_port->txfifo.count;
1383         spin_unlock_irqrestore(&edge_port->ep_lock, flags);
1384         if (num_chars) {
1385                 dev_dbg(&port->dev, "%s - returns %d\n", __func__, num_chars);
1386         }
1387
1388         return num_chars;
1389 }
1390
1391
1392 /*****************************************************************************
1393  * SerialThrottle
1394  *      this function is called by the tty driver when it wants to stop the data
1395  *      being read from the port.
1396  *****************************************************************************/
1397 static void edge_throttle(struct tty_struct *tty)
1398 {
1399         struct usb_serial_port *port = tty->driver_data;
1400         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1401         int status;
1402
1403         if (edge_port == NULL)
1404                 return;
1405
1406         if (!edge_port->open) {
1407                 dev_dbg(&port->dev, "%s - port not opened\n", __func__);
1408                 return;
1409         }
1410
1411         /* if we are implementing XON/XOFF, send the stop character */
1412         if (I_IXOFF(tty)) {
1413                 unsigned char stop_char = STOP_CHAR(tty);
1414                 status = edge_write(tty, port, &stop_char, 1);
1415                 if (status <= 0)
1416                         return;
1417         }
1418
1419         /* if we are implementing RTS/CTS, toggle that line */
1420         if (tty->termios.c_cflag & CRTSCTS) {
1421                 edge_port->shadowMCR &= ~MCR_RTS;
1422                 status = send_cmd_write_uart_register(edge_port, MCR,
1423                                                         edge_port->shadowMCR);
1424                 if (status != 0)
1425                         return;
1426         }
1427 }
1428
1429
1430 /*****************************************************************************
1431  * edge_unthrottle
1432  *      this function is called by the tty driver when it wants to resume the
1433  *      data being read from the port (called after SerialThrottle is called)
1434  *****************************************************************************/
1435 static void edge_unthrottle(struct tty_struct *tty)
1436 {
1437         struct usb_serial_port *port = tty->driver_data;
1438         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1439         int status;
1440
1441         if (edge_port == NULL)
1442                 return;
1443
1444         if (!edge_port->open) {
1445                 dev_dbg(&port->dev, "%s - port not opened\n", __func__);
1446                 return;
1447         }
1448
1449         /* if we are implementing XON/XOFF, send the start character */
1450         if (I_IXOFF(tty)) {
1451                 unsigned char start_char = START_CHAR(tty);
1452                 status = edge_write(tty, port, &start_char, 1);
1453                 if (status <= 0)
1454                         return;
1455         }
1456         /* if we are implementing RTS/CTS, toggle that line */
1457         if (tty->termios.c_cflag & CRTSCTS) {
1458                 edge_port->shadowMCR |= MCR_RTS;
1459                 send_cmd_write_uart_register(edge_port, MCR,
1460                                                 edge_port->shadowMCR);
1461         }
1462 }
1463
1464
1465 /*****************************************************************************
1466  * SerialSetTermios
1467  *      this function is called by the tty driver when it wants to change
1468  * the termios structure
1469  *****************************************************************************/
1470 static void edge_set_termios(struct tty_struct *tty,
1471         struct usb_serial_port *port, struct ktermios *old_termios)
1472 {
1473         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1474         unsigned int cflag;
1475
1476         cflag = tty->termios.c_cflag;
1477         dev_dbg(&port->dev, "%s - clfag %08x iflag %08x\n", __func__, tty->termios.c_cflag, tty->termios.c_iflag);
1478         dev_dbg(&port->dev, "%s - old clfag %08x old iflag %08x\n", __func__, old_termios->c_cflag, old_termios->c_iflag);
1479
1480         if (edge_port == NULL)
1481                 return;
1482
1483         if (!edge_port->open) {
1484                 dev_dbg(&port->dev, "%s - port not opened\n", __func__);
1485                 return;
1486         }
1487
1488         /* change the port settings to the new ones specified */
1489         change_port_settings(tty, edge_port, old_termios);
1490 }
1491
1492
1493 /*****************************************************************************
1494  * get_lsr_info - get line status register info
1495  *
1496  * Purpose: Let user call ioctl() to get info when the UART physically
1497  *          is emptied.  On bus types like RS485, the transmitter must
1498  *          release the bus after transmitting. This must be done when
1499  *          the transmit shift register is empty, not be done when the
1500  *          transmit holding register is empty.  This functionality
1501  *          allows an RS485 driver to be written in user space.
1502  *****************************************************************************/
1503 static int get_lsr_info(struct edgeport_port *edge_port,
1504                                                 unsigned int __user *value)
1505 {
1506         unsigned int result = 0;
1507         unsigned long flags;
1508
1509         spin_lock_irqsave(&edge_port->ep_lock, flags);
1510         if (edge_port->maxTxCredits == edge_port->txCredits &&
1511             edge_port->txfifo.count == 0) {
1512                 dev_dbg(&edge_port->port->dev, "%s -- Empty\n", __func__);
1513                 result = TIOCSER_TEMT;
1514         }
1515         spin_unlock_irqrestore(&edge_port->ep_lock, flags);
1516
1517         if (copy_to_user(value, &result, sizeof(int)))
1518                 return -EFAULT;
1519         return 0;
1520 }
1521
1522 static int edge_tiocmset(struct tty_struct *tty,
1523                                         unsigned int set, unsigned int clear)
1524 {
1525         struct usb_serial_port *port = tty->driver_data;
1526         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1527         unsigned int mcr;
1528
1529         mcr = edge_port->shadowMCR;
1530         if (set & TIOCM_RTS)
1531                 mcr |= MCR_RTS;
1532         if (set & TIOCM_DTR)
1533                 mcr |= MCR_DTR;
1534         if (set & TIOCM_LOOP)
1535                 mcr |= MCR_LOOPBACK;
1536
1537         if (clear & TIOCM_RTS)
1538                 mcr &= ~MCR_RTS;
1539         if (clear & TIOCM_DTR)
1540                 mcr &= ~MCR_DTR;
1541         if (clear & TIOCM_LOOP)
1542                 mcr &= ~MCR_LOOPBACK;
1543
1544         edge_port->shadowMCR = mcr;
1545
1546         send_cmd_write_uart_register(edge_port, MCR, edge_port->shadowMCR);
1547
1548         return 0;
1549 }
1550
1551 static int edge_tiocmget(struct tty_struct *tty)
1552 {
1553         struct usb_serial_port *port = tty->driver_data;
1554         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1555         unsigned int result = 0;
1556         unsigned int msr;
1557         unsigned int mcr;
1558
1559         msr = edge_port->shadowMSR;
1560         mcr = edge_port->shadowMCR;
1561         result = ((mcr & MCR_DTR)       ? TIOCM_DTR: 0)   /* 0x002 */
1562                   | ((mcr & MCR_RTS)    ? TIOCM_RTS: 0)   /* 0x004 */
1563                   | ((msr & EDGEPORT_MSR_CTS)   ? TIOCM_CTS: 0)   /* 0x020 */
1564                   | ((msr & EDGEPORT_MSR_CD)    ? TIOCM_CAR: 0)   /* 0x040 */
1565                   | ((msr & EDGEPORT_MSR_RI)    ? TIOCM_RI:  0)   /* 0x080 */
1566                   | ((msr & EDGEPORT_MSR_DSR)   ? TIOCM_DSR: 0);  /* 0x100 */
1567
1568         return result;
1569 }
1570
1571 static int get_serial_info(struct edgeport_port *edge_port,
1572                                 struct serial_struct __user *retinfo)
1573 {
1574         struct serial_struct tmp;
1575
1576         if (!retinfo)
1577                 return -EFAULT;
1578
1579         memset(&tmp, 0, sizeof(tmp));
1580
1581         tmp.type                = PORT_16550A;
1582         tmp.line                = edge_port->port->minor;
1583         tmp.port                = edge_port->port->port_number;
1584         tmp.irq                 = 0;
1585         tmp.flags               = ASYNC_SKIP_TEST | ASYNC_AUTO_IRQ;
1586         tmp.xmit_fifo_size      = edge_port->maxTxCredits;
1587         tmp.baud_base           = 9600;
1588         tmp.close_delay         = 5*HZ;
1589         tmp.closing_wait        = 30*HZ;
1590
1591         if (copy_to_user(retinfo, &tmp, sizeof(*retinfo)))
1592                 return -EFAULT;
1593         return 0;
1594 }
1595
1596
1597 /*****************************************************************************
1598  * SerialIoctl
1599  *      this function handles any ioctl calls to the driver
1600  *****************************************************************************/
1601 static int edge_ioctl(struct tty_struct *tty,
1602                                         unsigned int cmd, unsigned long arg)
1603 {
1604         struct usb_serial_port *port = tty->driver_data;
1605         DEFINE_WAIT(wait);
1606         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1607
1608         switch (cmd) {
1609         case TIOCSERGETLSR:
1610                 dev_dbg(&port->dev, "%s TIOCSERGETLSR\n", __func__);
1611                 return get_lsr_info(edge_port, (unsigned int __user *) arg);
1612
1613         case TIOCGSERIAL:
1614                 dev_dbg(&port->dev, "%s TIOCGSERIAL\n", __func__);
1615                 return get_serial_info(edge_port, (struct serial_struct __user *) arg);
1616         }
1617         return -ENOIOCTLCMD;
1618 }
1619
1620
1621 /*****************************************************************************
1622  * SerialBreak
1623  *      this function sends a break to the port
1624  *****************************************************************************/
1625 static void edge_break(struct tty_struct *tty, int break_state)
1626 {
1627         struct usb_serial_port *port = tty->driver_data;
1628         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1629         struct edgeport_serial *edge_serial = usb_get_serial_data(port->serial);
1630         int status;
1631
1632         if ((!edge_serial->is_epic) ||
1633             ((edge_serial->is_epic) &&
1634              (edge_serial->epic_descriptor.Supports.IOSPChase))) {
1635                 /* flush and chase */
1636                 edge_port->chaseResponsePending = true;
1637
1638                 dev_dbg(&port->dev, "%s - Sending IOSP_CMD_CHASE_PORT\n", __func__);
1639                 status = send_iosp_ext_cmd(edge_port, IOSP_CMD_CHASE_PORT, 0);
1640                 if (status == 0) {
1641                         /* block until chase finished */
1642                         block_until_chase_response(edge_port);
1643                 } else {
1644                         edge_port->chaseResponsePending = false;
1645                 }
1646         }
1647
1648         if ((!edge_serial->is_epic) ||
1649             ((edge_serial->is_epic) &&
1650              (edge_serial->epic_descriptor.Supports.IOSPSetClrBreak))) {
1651                 if (break_state == -1) {
1652                         dev_dbg(&port->dev, "%s - Sending IOSP_CMD_SET_BREAK\n", __func__);
1653                         status = send_iosp_ext_cmd(edge_port,
1654                                                 IOSP_CMD_SET_BREAK, 0);
1655                 } else {
1656                         dev_dbg(&port->dev, "%s - Sending IOSP_CMD_CLEAR_BREAK\n", __func__);
1657                         status = send_iosp_ext_cmd(edge_port,
1658                                                 IOSP_CMD_CLEAR_BREAK, 0);
1659                 }
1660                 if (status)
1661                         dev_dbg(&port->dev, "%s - error sending break set/clear command.\n",
1662                                 __func__);
1663         }
1664 }
1665
1666
1667 /*****************************************************************************
1668  * process_rcvd_data
1669  *      this function handles the data received on the bulk in pipe.
1670  *****************************************************************************/
1671 static void process_rcvd_data(struct edgeport_serial *edge_serial,
1672                                 unsigned char *buffer, __u16 bufferLength)
1673 {
1674         struct usb_serial *serial = edge_serial->serial;
1675         struct device *dev = &serial->dev->dev;
1676         struct usb_serial_port *port;
1677         struct edgeport_port *edge_port;
1678         __u16 lastBufferLength;
1679         __u16 rxLen;
1680
1681         lastBufferLength = bufferLength + 1;
1682
1683         while (bufferLength > 0) {
1684                 /* failsafe incase we get a message that we don't understand */
1685                 if (lastBufferLength == bufferLength) {
1686                         dev_dbg(dev, "%s - stuck in loop, exiting it.\n", __func__);
1687                         break;
1688                 }
1689                 lastBufferLength = bufferLength;
1690
1691                 switch (edge_serial->rxState) {
1692                 case EXPECT_HDR1:
1693                         edge_serial->rxHeader1 = *buffer;
1694                         ++buffer;
1695                         --bufferLength;
1696
1697                         if (bufferLength == 0) {
1698                                 edge_serial->rxState = EXPECT_HDR2;
1699                                 break;
1700                         }
1701                         /* otherwise, drop on through */
1702                 case EXPECT_HDR2:
1703                         edge_serial->rxHeader2 = *buffer;
1704                         ++buffer;
1705                         --bufferLength;
1706
1707                         dev_dbg(dev, "%s - Hdr1=%02X Hdr2=%02X\n", __func__,
1708                                 edge_serial->rxHeader1, edge_serial->rxHeader2);
1709                         /* Process depending on whether this header is
1710                          * data or status */
1711
1712                         if (IS_CMD_STAT_HDR(edge_serial->rxHeader1)) {
1713                                 /* Decode this status header and go to
1714                                  * EXPECT_HDR1 (if we can process the status
1715                                  * with only 2 bytes), or go to EXPECT_HDR3 to
1716                                  * get the third byte. */
1717                                 edge_serial->rxPort =
1718                                     IOSP_GET_HDR_PORT(edge_serial->rxHeader1);
1719                                 edge_serial->rxStatusCode =
1720                                     IOSP_GET_STATUS_CODE(
1721                                                 edge_serial->rxHeader1);
1722
1723                                 if (!IOSP_STATUS_IS_2BYTE(
1724                                                 edge_serial->rxStatusCode)) {
1725                                         /* This status needs additional bytes.
1726                                          * Save what we have and then wait for
1727                                          * more data.
1728                                          */
1729                                         edge_serial->rxStatusParam
1730                                                 = edge_serial->rxHeader2;
1731                                         edge_serial->rxState = EXPECT_HDR3;
1732                                         break;
1733                                 }
1734                                 /* We have all the header bytes, process the
1735                                    status now */
1736                                 process_rcvd_status(edge_serial,
1737                                                 edge_serial->rxHeader2, 0);
1738                                 edge_serial->rxState = EXPECT_HDR1;
1739                                 break;
1740                         } else {
1741                                 edge_serial->rxPort =
1742                                     IOSP_GET_HDR_PORT(edge_serial->rxHeader1);
1743                                 edge_serial->rxBytesRemaining =
1744                                     IOSP_GET_HDR_DATA_LEN(
1745                                                 edge_serial->rxHeader1,
1746                                                 edge_serial->rxHeader2);
1747                                 dev_dbg(dev, "%s - Data for Port %u Len %u\n",
1748                                         __func__,
1749                                         edge_serial->rxPort,
1750                                         edge_serial->rxBytesRemaining);
1751
1752                                 /* ASSERT(DevExt->RxPort < DevExt->NumPorts);
1753                                  * ASSERT(DevExt->RxBytesRemaining <
1754                                  *              IOSP_MAX_DATA_LENGTH);
1755                                  */
1756
1757                                 if (bufferLength == 0) {
1758                                         edge_serial->rxState = EXPECT_DATA;
1759                                         break;
1760                                 }
1761                                 /* Else, drop through */
1762                         }
1763                 case EXPECT_DATA: /* Expect data */
1764                         if (bufferLength < edge_serial->rxBytesRemaining) {
1765                                 rxLen = bufferLength;
1766                                 /* Expect data to start next buffer */
1767                                 edge_serial->rxState = EXPECT_DATA;
1768                         } else {
1769                                 /* BufLen >= RxBytesRemaining */
1770                                 rxLen = edge_serial->rxBytesRemaining;
1771                                 /* Start another header next time */
1772                                 edge_serial->rxState = EXPECT_HDR1;
1773                         }
1774
1775                         bufferLength -= rxLen;
1776                         edge_serial->rxBytesRemaining -= rxLen;
1777
1778                         /* spit this data back into the tty driver if this
1779                            port is open */
1780                         if (rxLen && edge_serial->rxPort < serial->num_ports) {
1781                                 port = serial->port[edge_serial->rxPort];
1782                                 edge_port = usb_get_serial_port_data(port);
1783                                 if (edge_port && edge_port->open) {
1784                                         dev_dbg(dev, "%s - Sending %d bytes to TTY for port %d\n",
1785                                                 __func__, rxLen,
1786                                                 edge_serial->rxPort);
1787                                         edge_tty_recv(edge_port->port, buffer,
1788                                                         rxLen);
1789                                         edge_port->port->icount.rx += rxLen;
1790                                 }
1791                         }
1792                         buffer += rxLen;
1793                         break;
1794
1795                 case EXPECT_HDR3:       /* Expect 3rd byte of status header */
1796                         edge_serial->rxHeader3 = *buffer;
1797                         ++buffer;
1798                         --bufferLength;
1799
1800                         /* We have all the header bytes, process the
1801                            status now */
1802                         process_rcvd_status(edge_serial,
1803                                 edge_serial->rxStatusParam,
1804                                 edge_serial->rxHeader3);
1805                         edge_serial->rxState = EXPECT_HDR1;
1806                         break;
1807                 }
1808         }
1809 }
1810
1811
1812 /*****************************************************************************
1813  * process_rcvd_status
1814  *      this function handles the any status messages received on the
1815  *      bulk in pipe.
1816  *****************************************************************************/
1817 static void process_rcvd_status(struct edgeport_serial *edge_serial,
1818                                                 __u8 byte2, __u8 byte3)
1819 {
1820         struct usb_serial_port *port;
1821         struct edgeport_port *edge_port;
1822         struct tty_struct *tty;
1823         struct device *dev;
1824         __u8 code = edge_serial->rxStatusCode;
1825
1826         /* switch the port pointer to the one being currently talked about */
1827         if (edge_serial->rxPort >= edge_serial->serial->num_ports)
1828                 return;
1829         port = edge_serial->serial->port[edge_serial->rxPort];
1830         edge_port = usb_get_serial_port_data(port);
1831         if (edge_port == NULL) {
1832                 dev_err(&edge_serial->serial->dev->dev,
1833                         "%s - edge_port == NULL for port %d\n",
1834                                         __func__, edge_serial->rxPort);
1835                 return;
1836         }
1837         dev = &port->dev;
1838
1839         if (code == IOSP_EXT_STATUS) {
1840                 switch (byte2) {
1841                 case IOSP_EXT_STATUS_CHASE_RSP:
1842                         /* we want to do EXT status regardless of port
1843                          * open/closed */
1844                         dev_dbg(dev, "%s - Port %u EXT CHASE_RSP Data = %02x\n",
1845                                 __func__, edge_serial->rxPort, byte3);
1846                         /* Currently, the only EXT_STATUS is Chase, so process
1847                          * here instead of one more call to one more subroutine
1848                          * If/when more EXT_STATUS, there'll be more work to do
1849                          * Also, we currently clear flag and close the port
1850                          * regardless of content of above's Byte3.
1851                          * We could choose to do something else when Byte3 says
1852                          * Timeout on Chase from Edgeport, like wait longer in
1853                          * block_until_chase_response, but for now we don't.
1854                          */
1855                         edge_port->chaseResponsePending = false;
1856                         wake_up(&edge_port->wait_chase);
1857                         return;
1858
1859                 case IOSP_EXT_STATUS_RX_CHECK_RSP:
1860                         dev_dbg(dev, "%s ========== Port %u CHECK_RSP Sequence = %02x =============\n",
1861                                 __func__, edge_serial->rxPort, byte3);
1862                         /* Port->RxCheckRsp = true; */
1863                         return;
1864                 }
1865         }
1866
1867         if (code == IOSP_STATUS_OPEN_RSP) {
1868                 edge_port->txCredits = GET_TX_BUFFER_SIZE(byte3);
1869                 edge_port->maxTxCredits = edge_port->txCredits;
1870                 dev_dbg(dev, "%s - Port %u Open Response Initial MSR = %02x TxBufferSize = %d\n",
1871                         __func__, edge_serial->rxPort, byte2, edge_port->txCredits);
1872                 handle_new_msr(edge_port, byte2);
1873
1874                 /* send the current line settings to the port so we are
1875                    in sync with any further termios calls */
1876                 tty = tty_port_tty_get(&edge_port->port->port);
1877                 if (tty) {
1878                         change_port_settings(tty,
1879                                 edge_port, &tty->termios);
1880                         tty_kref_put(tty);
1881                 }
1882
1883                 /* we have completed the open */
1884                 edge_port->openPending = false;
1885                 edge_port->open = true;
1886                 wake_up(&edge_port->wait_open);
1887                 return;
1888         }
1889
1890         /* If port is closed, silently discard all rcvd status. We can
1891          * have cases where buffered status is received AFTER the close
1892          * port command is sent to the Edgeport.
1893          */
1894         if (!edge_port->open || edge_port->closePending)
1895                 return;
1896
1897         switch (code) {
1898         /* Not currently sent by Edgeport */
1899         case IOSP_STATUS_LSR:
1900                 dev_dbg(dev, "%s - Port %u LSR Status = %02x\n",
1901                         __func__, edge_serial->rxPort, byte2);
1902                 handle_new_lsr(edge_port, false, byte2, 0);
1903                 break;
1904
1905         case IOSP_STATUS_LSR_DATA:
1906                 dev_dbg(dev, "%s - Port %u LSR Status = %02x, Data = %02x\n",
1907                         __func__, edge_serial->rxPort, byte2, byte3);
1908                 /* byte2 is LSR Register */
1909                 /* byte3 is broken data byte */
1910                 handle_new_lsr(edge_port, true, byte2, byte3);
1911                 break;
1912         /*
1913          *      case IOSP_EXT_4_STATUS:
1914          *              dev_dbg(dev, "%s - Port %u LSR Status = %02x Data = %02x\n",
1915          *                      __func__, edge_serial->rxPort, byte2, byte3);
1916          *              break;
1917          */
1918         case IOSP_STATUS_MSR:
1919                 dev_dbg(dev, "%s - Port %u MSR Status = %02x\n",
1920                         __func__, edge_serial->rxPort, byte2);
1921                 /*
1922                  * Process this new modem status and generate appropriate
1923                  * events, etc, based on the new status. This routine
1924                  * also saves the MSR in Port->ShadowMsr.
1925                  */
1926                 handle_new_msr(edge_port, byte2);
1927                 break;
1928
1929         default:
1930                 dev_dbg(dev, "%s - Unrecognized IOSP status code %u\n", __func__, code);
1931                 break;
1932         }
1933 }
1934
1935
1936 /*****************************************************************************
1937  * edge_tty_recv
1938  *      this function passes data on to the tty flip buffer
1939  *****************************************************************************/
1940 static void edge_tty_recv(struct usb_serial_port *port, unsigned char *data,
1941                 int length)
1942 {
1943         int cnt;
1944
1945         cnt = tty_insert_flip_string(&port->port, data, length);
1946         if (cnt < length) {
1947                 dev_err(&port->dev, "%s - dropping data, %d bytes lost\n",
1948                                 __func__, length - cnt);
1949         }
1950         data += cnt;
1951         length -= cnt;
1952
1953         tty_flip_buffer_push(&port->port);
1954 }
1955
1956
1957 /*****************************************************************************
1958  * handle_new_msr
1959  *      this function handles any change to the msr register for a port.
1960  *****************************************************************************/
1961 static void handle_new_msr(struct edgeport_port *edge_port, __u8 newMsr)
1962 {
1963         struct  async_icount *icount;
1964
1965         if (newMsr & (EDGEPORT_MSR_DELTA_CTS | EDGEPORT_MSR_DELTA_DSR |
1966                         EDGEPORT_MSR_DELTA_RI | EDGEPORT_MSR_DELTA_CD)) {
1967                 icount = &edge_port->port->icount;
1968
1969                 /* update input line counters */
1970                 if (newMsr & EDGEPORT_MSR_DELTA_CTS)
1971                         icount->cts++;
1972                 if (newMsr & EDGEPORT_MSR_DELTA_DSR)
1973                         icount->dsr++;
1974                 if (newMsr & EDGEPORT_MSR_DELTA_CD)
1975                         icount->dcd++;
1976                 if (newMsr & EDGEPORT_MSR_DELTA_RI)
1977                         icount->rng++;
1978                 wake_up_interruptible(&edge_port->port->port.delta_msr_wait);
1979         }
1980
1981         /* Save the new modem status */
1982         edge_port->shadowMSR = newMsr & 0xf0;
1983 }
1984
1985
1986 /*****************************************************************************
1987  * handle_new_lsr
1988  *      this function handles any change to the lsr register for a port.
1989  *****************************************************************************/
1990 static void handle_new_lsr(struct edgeport_port *edge_port, __u8 lsrData,
1991                                                         __u8 lsr, __u8 data)
1992 {
1993         __u8 newLsr = (__u8) (lsr & (__u8)
1994                 (LSR_OVER_ERR | LSR_PAR_ERR | LSR_FRM_ERR | LSR_BREAK));
1995         struct async_icount *icount;
1996
1997         edge_port->shadowLSR = lsr;
1998
1999         if (newLsr & LSR_BREAK) {
2000                 /*
2001                  * Parity and Framing errors only count if they
2002                  * occur exclusive of a break being
2003                  * received.
2004                  */
2005                 newLsr &= (__u8)(LSR_OVER_ERR | LSR_BREAK);
2006         }
2007
2008         /* Place LSR data byte into Rx buffer */
2009         if (lsrData)
2010                 edge_tty_recv(edge_port->port, &data, 1);
2011
2012         /* update input line counters */
2013         icount = &edge_port->port->icount;
2014         if (newLsr & LSR_BREAK)
2015                 icount->brk++;
2016         if (newLsr & LSR_OVER_ERR)
2017                 icount->overrun++;
2018         if (newLsr & LSR_PAR_ERR)
2019                 icount->parity++;
2020         if (newLsr & LSR_FRM_ERR)
2021                 icount->frame++;
2022 }
2023
2024
2025 /****************************************************************************
2026  * sram_write
2027  *      writes a number of bytes to the Edgeport device's sram starting at the
2028  *      given address.
2029  *      If successful returns the number of bytes written, otherwise it returns
2030  *      a negative error number of the problem.
2031  ****************************************************************************/
2032 static int sram_write(struct usb_serial *serial, __u16 extAddr, __u16 addr,
2033                                         __u16 length, const __u8 *data)
2034 {
2035         int result;
2036         __u16 current_length;
2037         unsigned char *transfer_buffer;
2038
2039         dev_dbg(&serial->dev->dev, "%s - %x, %x, %d\n", __func__, extAddr, addr, length);
2040
2041         transfer_buffer =  kmalloc(64, GFP_KERNEL);
2042         if (!transfer_buffer)
2043                 return -ENOMEM;
2044
2045         /* need to split these writes up into 64 byte chunks */
2046         result = 0;
2047         while (length > 0) {
2048                 if (length > 64)
2049                         current_length = 64;
2050                 else
2051                         current_length = length;
2052
2053 /*              dev_dbg(&serial->dev->dev, "%s - writing %x, %x, %d\n", __func__, extAddr, addr, current_length); */
2054                 memcpy(transfer_buffer, data, current_length);
2055                 result = usb_control_msg(serial->dev,
2056                                         usb_sndctrlpipe(serial->dev, 0),
2057                                         USB_REQUEST_ION_WRITE_RAM,
2058                                         0x40, addr, extAddr, transfer_buffer,
2059                                         current_length, 300);
2060                 if (result < 0)
2061                         break;
2062                 length -= current_length;
2063                 addr += current_length;
2064                 data += current_length;
2065         }
2066
2067         kfree(transfer_buffer);
2068         return result;
2069 }
2070
2071
2072 /****************************************************************************
2073  * rom_write
2074  *      writes a number of bytes to the Edgeport device's ROM starting at the
2075  *      given address.
2076  *      If successful returns the number of bytes written, otherwise it returns
2077  *      a negative error number of the problem.
2078  ****************************************************************************/
2079 static int rom_write(struct usb_serial *serial, __u16 extAddr, __u16 addr,
2080                                         __u16 length, const __u8 *data)
2081 {
2082         int result;
2083         __u16 current_length;
2084         unsigned char *transfer_buffer;
2085
2086         transfer_buffer =  kmalloc(64, GFP_KERNEL);
2087         if (!transfer_buffer)
2088                 return -ENOMEM;
2089
2090         /* need to split these writes up into 64 byte chunks */
2091         result = 0;
2092         while (length > 0) {
2093                 if (length > 64)
2094                         current_length = 64;
2095                 else
2096                         current_length = length;
2097                 memcpy(transfer_buffer, data, current_length);
2098                 result = usb_control_msg(serial->dev,
2099                                         usb_sndctrlpipe(serial->dev, 0),
2100                                         USB_REQUEST_ION_WRITE_ROM, 0x40,
2101                                         addr, extAddr,
2102                                         transfer_buffer, current_length, 300);
2103                 if (result < 0)
2104                         break;
2105                 length -= current_length;
2106                 addr += current_length;
2107                 data += current_length;
2108         }
2109
2110         kfree(transfer_buffer);
2111         return result;
2112 }
2113
2114
2115 /****************************************************************************
2116  * rom_read
2117  *      reads a number of bytes from the Edgeport device starting at the given
2118  *      address.
2119  *      Returns zero on success or a negative error number.
2120  ****************************************************************************/
2121 static int rom_read(struct usb_serial *serial, __u16 extAddr,
2122                                         __u16 addr, __u16 length, __u8 *data)
2123 {
2124         int result;
2125         __u16 current_length;
2126         unsigned char *transfer_buffer;
2127
2128         transfer_buffer =  kmalloc(64, GFP_KERNEL);
2129         if (!transfer_buffer)
2130                 return -ENOMEM;
2131
2132         /* need to split these reads up into 64 byte chunks */
2133         result = 0;
2134         while (length > 0) {
2135                 if (length > 64)
2136                         current_length = 64;
2137                 else
2138                         current_length = length;
2139                 result = usb_control_msg(serial->dev,
2140                                         usb_rcvctrlpipe(serial->dev, 0),
2141                                         USB_REQUEST_ION_READ_ROM,
2142                                         0xC0, addr, extAddr, transfer_buffer,
2143                                         current_length, 300);
2144                 if (result < current_length) {
2145                         if (result >= 0)
2146                                 result = -EIO;
2147                         break;
2148                 }
2149                 memcpy(data, transfer_buffer, current_length);
2150                 length -= current_length;
2151                 addr += current_length;
2152                 data += current_length;
2153
2154                 result = 0;
2155         }
2156
2157         kfree(transfer_buffer);
2158         return result;
2159 }
2160
2161
2162 /****************************************************************************
2163  * send_iosp_ext_cmd
2164  *      Is used to send a IOSP message to the Edgeport device
2165  ****************************************************************************/
2166 static int send_iosp_ext_cmd(struct edgeport_port *edge_port,
2167                                                 __u8 command, __u8 param)
2168 {
2169         unsigned char   *buffer;
2170         unsigned char   *currentCommand;
2171         int             length = 0;
2172         int             status = 0;
2173
2174         buffer = kmalloc(10, GFP_ATOMIC);
2175         if (!buffer)
2176                 return -ENOMEM;
2177
2178         currentCommand = buffer;
2179
2180         MAKE_CMD_EXT_CMD(&currentCommand, &length, edge_port->port->port_number,
2181                          command, param);
2182
2183         status = write_cmd_usb(edge_port, buffer, length);
2184         if (status) {
2185                 /* something bad happened, let's free up the memory */
2186                 kfree(buffer);
2187         }
2188
2189         return status;
2190 }
2191
2192
2193 /*****************************************************************************
2194  * write_cmd_usb
2195  *      this function writes the given buffer out to the bulk write endpoint.
2196  *****************************************************************************/
2197 static int write_cmd_usb(struct edgeport_port *edge_port,
2198                                         unsigned char *buffer, int length)
2199 {
2200         struct edgeport_serial *edge_serial =
2201                                 usb_get_serial_data(edge_port->port->serial);
2202         struct device *dev = &edge_port->port->dev;
2203         int status = 0;
2204         struct urb *urb;
2205
2206         usb_serial_debug_data(dev, __func__, length, buffer);
2207
2208         /* Allocate our next urb */
2209         urb = usb_alloc_urb(0, GFP_ATOMIC);
2210         if (!urb)
2211                 return -ENOMEM;
2212
2213         atomic_inc(&CmdUrbs);
2214         dev_dbg(dev, "%s - ALLOCATE URB %p (outstanding %d)\n",
2215                 __func__, urb, atomic_read(&CmdUrbs));
2216
2217         usb_fill_bulk_urb(urb, edge_serial->serial->dev,
2218                         usb_sndbulkpipe(edge_serial->serial->dev,
2219                                         edge_serial->bulk_out_endpoint),
2220                         buffer, length, edge_bulk_out_cmd_callback, edge_port);
2221
2222         edge_port->commandPending = true;
2223         status = usb_submit_urb(urb, GFP_ATOMIC);
2224
2225         if (status) {
2226                 /* something went wrong */
2227                 dev_err(dev, "%s - usb_submit_urb(write command) failed, status = %d\n",
2228                         __func__, status);
2229                 usb_free_urb(urb);
2230                 atomic_dec(&CmdUrbs);
2231                 return status;
2232         }
2233
2234 #if 0
2235         wait_event(&edge_port->wait_command, !edge_port->commandPending);
2236
2237         if (edge_port->commandPending) {
2238                 /* command timed out */
2239                 dev_dbg(dev, "%s - command timed out\n", __func__);
2240                 status = -EINVAL;
2241         }
2242 #endif
2243         return status;
2244 }
2245
2246
2247 /*****************************************************************************
2248  * send_cmd_write_baud_rate
2249  *      this function sends the proper command to change the baud rate of the
2250  *      specified port.
2251  *****************************************************************************/
2252 static int send_cmd_write_baud_rate(struct edgeport_port *edge_port,
2253                                                                 int baudRate)
2254 {
2255         struct edgeport_serial *edge_serial =
2256                                 usb_get_serial_data(edge_port->port->serial);
2257         struct device *dev = &edge_port->port->dev;
2258         unsigned char *cmdBuffer;
2259         unsigned char *currCmd;
2260         int cmdLen = 0;
2261         int divisor;
2262         int status;
2263         u32 number = edge_port->port->port_number;
2264
2265         if (edge_serial->is_epic &&
2266             !edge_serial->epic_descriptor.Supports.IOSPSetBaudRate) {
2267                 dev_dbg(dev, "SendCmdWriteBaudRate - NOT Setting baud rate for port, baud = %d\n",
2268                         baudRate);
2269                 return 0;
2270         }
2271
2272         dev_dbg(dev, "%s - baud = %d\n", __func__, baudRate);
2273
2274         status = calc_baud_rate_divisor(dev, baudRate, &divisor);
2275         if (status) {
2276                 dev_err(dev, "%s - bad baud rate\n", __func__);
2277                 return status;
2278         }
2279
2280         /* Alloc memory for the string of commands. */
2281         cmdBuffer =  kmalloc(0x100, GFP_ATOMIC);
2282         if (!cmdBuffer)
2283                 return -ENOMEM;
2284
2285         currCmd = cmdBuffer;
2286
2287         /* Enable access to divisor latch */
2288         MAKE_CMD_WRITE_REG(&currCmd, &cmdLen, number, LCR, LCR_DL_ENABLE);
2289
2290         /* Write the divisor itself */
2291         MAKE_CMD_WRITE_REG(&currCmd, &cmdLen, number, DLL, LOW8(divisor));
2292         MAKE_CMD_WRITE_REG(&currCmd, &cmdLen, number, DLM, HIGH8(divisor));
2293
2294         /* Restore original value to disable access to divisor latch */
2295         MAKE_CMD_WRITE_REG(&currCmd, &cmdLen, number, LCR,
2296                                                 edge_port->shadowLCR);
2297
2298         status = write_cmd_usb(edge_port, cmdBuffer, cmdLen);
2299         if (status) {
2300                 /* something bad happened, let's free up the memory */
2301                 kfree(cmdBuffer);
2302         }
2303
2304         return status;
2305 }
2306
2307
2308 /*****************************************************************************
2309  * calc_baud_rate_divisor
2310  *      this function calculates the proper baud rate divisor for the specified
2311  *      baud rate.
2312  *****************************************************************************/
2313 static int calc_baud_rate_divisor(struct device *dev, int baudrate, int *divisor)
2314 {
2315         int i;
2316         __u16 custom;
2317
2318         for (i = 0; i < ARRAY_SIZE(divisor_table); i++) {
2319                 if (divisor_table[i].BaudRate == baudrate) {
2320                         *divisor = divisor_table[i].Divisor;
2321                         return 0;
2322                 }
2323         }
2324
2325         /* We have tried all of the standard baud rates
2326          * lets try to calculate the divisor for this baud rate
2327          * Make sure the baud rate is reasonable */
2328         if (baudrate > 50 && baudrate < 230400) {
2329                 /* get divisor */
2330                 custom = (__u16)((230400L + baudrate/2) / baudrate);
2331
2332                 *divisor = custom;
2333
2334                 dev_dbg(dev, "%s - Baud %d = %d\n", __func__, baudrate, custom);
2335                 return 0;
2336         }
2337
2338         return -1;
2339 }
2340
2341
2342 /*****************************************************************************
2343  * send_cmd_write_uart_register
2344  *  this function builds up a uart register message and sends to the device.
2345  *****************************************************************************/
2346 static int send_cmd_write_uart_register(struct edgeport_port *edge_port,
2347                                                 __u8 regNum, __u8 regValue)
2348 {
2349         struct edgeport_serial *edge_serial =
2350                                 usb_get_serial_data(edge_port->port->serial);
2351         struct device *dev = &edge_port->port->dev;
2352         unsigned char *cmdBuffer;
2353         unsigned char *currCmd;
2354         unsigned long cmdLen = 0;
2355         int status;
2356
2357         dev_dbg(dev, "%s - write to %s register 0x%02x\n",
2358                 (regNum == MCR) ? "MCR" : "LCR", __func__, regValue);
2359
2360         if (edge_serial->is_epic &&
2361             !edge_serial->epic_descriptor.Supports.IOSPWriteMCR &&
2362             regNum == MCR) {
2363                 dev_dbg(dev, "SendCmdWriteUartReg - Not writing to MCR Register\n");
2364                 return 0;
2365         }
2366
2367         if (edge_serial->is_epic &&
2368             !edge_serial->epic_descriptor.Supports.IOSPWriteLCR &&
2369             regNum == LCR) {
2370                 dev_dbg(dev, "SendCmdWriteUartReg - Not writing to LCR Register\n");
2371                 return 0;
2372         }
2373
2374         /* Alloc memory for the string of commands. */
2375         cmdBuffer = kmalloc(0x10, GFP_ATOMIC);
2376         if (cmdBuffer == NULL)
2377                 return -ENOMEM;
2378
2379         currCmd = cmdBuffer;
2380
2381         /* Build a cmd in the buffer to write the given register */
2382         MAKE_CMD_WRITE_REG(&currCmd, &cmdLen, edge_port->port->port_number,
2383                            regNum, regValue);
2384
2385         status = write_cmd_usb(edge_port, cmdBuffer, cmdLen);
2386         if (status) {
2387                 /* something bad happened, let's free up the memory */
2388                 kfree(cmdBuffer);
2389         }
2390
2391         return status;
2392 }
2393
2394
2395 /*****************************************************************************
2396  * change_port_settings
2397  *      This routine is called to set the UART on the device to match the
2398  *      specified new settings.
2399  *****************************************************************************/
2400
2401 static void change_port_settings(struct tty_struct *tty,
2402         struct edgeport_port *edge_port, struct ktermios *old_termios)
2403 {
2404         struct device *dev = &edge_port->port->dev;
2405         struct edgeport_serial *edge_serial =
2406                         usb_get_serial_data(edge_port->port->serial);
2407         int baud;
2408         unsigned cflag;
2409         __u8 mask = 0xff;
2410         __u8 lData;
2411         __u8 lParity;
2412         __u8 lStop;
2413         __u8 rxFlow;
2414         __u8 txFlow;
2415         int status;
2416
2417         if (!edge_port->open &&
2418             !edge_port->openPending) {
2419                 dev_dbg(dev, "%s - port not opened\n", __func__);
2420                 return;
2421         }
2422
2423         cflag = tty->termios.c_cflag;
2424
2425         switch (cflag & CSIZE) {
2426         case CS5:
2427                 lData = LCR_BITS_5; mask = 0x1f;
2428                 dev_dbg(dev, "%s - data bits = 5\n", __func__);
2429                 break;
2430         case CS6:
2431                 lData = LCR_BITS_6; mask = 0x3f;
2432                 dev_dbg(dev, "%s - data bits = 6\n", __func__);
2433                 break;
2434         case CS7:
2435                 lData = LCR_BITS_7; mask = 0x7f;
2436                 dev_dbg(dev, "%s - data bits = 7\n", __func__);
2437                 break;
2438         default:
2439         case CS8:
2440                 lData = LCR_BITS_8;
2441                 dev_dbg(dev, "%s - data bits = 8\n", __func__);
2442                 break;
2443         }
2444
2445         lParity = LCR_PAR_NONE;
2446         if (cflag & PARENB) {
2447                 if (cflag & CMSPAR) {
2448                         if (cflag & PARODD) {
2449                                 lParity = LCR_PAR_MARK;
2450                                 dev_dbg(dev, "%s - parity = mark\n", __func__);
2451                         } else {
2452                                 lParity = LCR_PAR_SPACE;
2453                                 dev_dbg(dev, "%s - parity = space\n", __func__);
2454                         }
2455                 } else if (cflag & PARODD) {
2456                         lParity = LCR_PAR_ODD;
2457                         dev_dbg(dev, "%s - parity = odd\n", __func__);
2458                 } else {
2459                         lParity = LCR_PAR_EVEN;
2460                         dev_dbg(dev, "%s - parity = even\n", __func__);
2461                 }
2462         } else {
2463                 dev_dbg(dev, "%s - parity = none\n", __func__);
2464         }
2465
2466         if (cflag & CSTOPB) {
2467                 lStop = LCR_STOP_2;
2468                 dev_dbg(dev, "%s - stop bits = 2\n", __func__);
2469         } else {
2470                 lStop = LCR_STOP_1;
2471                 dev_dbg(dev, "%s - stop bits = 1\n", __func__);
2472         }
2473
2474         /* figure out the flow control settings */
2475         rxFlow = txFlow = 0x00;
2476         if (cflag & CRTSCTS) {
2477                 rxFlow |= IOSP_RX_FLOW_RTS;
2478                 txFlow |= IOSP_TX_FLOW_CTS;
2479                 dev_dbg(dev, "%s - RTS/CTS is enabled\n", __func__);
2480         } else {
2481                 dev_dbg(dev, "%s - RTS/CTS is disabled\n", __func__);
2482         }
2483
2484         /* if we are implementing XON/XOFF, set the start and stop character
2485            in the device */
2486         if (I_IXOFF(tty) || I_IXON(tty)) {
2487                 unsigned char stop_char  = STOP_CHAR(tty);
2488                 unsigned char start_char = START_CHAR(tty);
2489
2490                 if ((!edge_serial->is_epic) ||
2491                     ((edge_serial->is_epic) &&
2492                      (edge_serial->epic_descriptor.Supports.IOSPSetXChar))) {
2493                         send_iosp_ext_cmd(edge_port,
2494                                         IOSP_CMD_SET_XON_CHAR, start_char);
2495                         send_iosp_ext_cmd(edge_port,
2496                                         IOSP_CMD_SET_XOFF_CHAR, stop_char);
2497                 }
2498
2499                 /* if we are implementing INBOUND XON/XOFF */
2500                 if (I_IXOFF(tty)) {
2501                         rxFlow |= IOSP_RX_FLOW_XON_XOFF;
2502                         dev_dbg(dev, "%s - INBOUND XON/XOFF is enabled, XON = %2x, XOFF = %2x\n",
2503                                 __func__, start_char, stop_char);
2504                 } else {
2505                         dev_dbg(dev, "%s - INBOUND XON/XOFF is disabled\n", __func__);
2506                 }
2507
2508                 /* if we are implementing OUTBOUND XON/XOFF */
2509                 if (I_IXON(tty)) {
2510                         txFlow |= IOSP_TX_FLOW_XON_XOFF;
2511                         dev_dbg(dev, "%s - OUTBOUND XON/XOFF is enabled, XON = %2x, XOFF = %2x\n",
2512                                 __func__, start_char, stop_char);
2513                 } else {
2514                         dev_dbg(dev, "%s - OUTBOUND XON/XOFF is disabled\n", __func__);
2515                 }
2516         }
2517
2518         /* Set flow control to the configured value */
2519         if ((!edge_serial->is_epic) ||
2520             ((edge_serial->is_epic) &&
2521              (edge_serial->epic_descriptor.Supports.IOSPSetRxFlow)))
2522                 send_iosp_ext_cmd(edge_port, IOSP_CMD_SET_RX_FLOW, rxFlow);
2523         if ((!edge_serial->is_epic) ||
2524             ((edge_serial->is_epic) &&
2525              (edge_serial->epic_descriptor.Supports.IOSPSetTxFlow)))
2526                 send_iosp_ext_cmd(edge_port, IOSP_CMD_SET_TX_FLOW, txFlow);
2527
2528
2529         edge_port->shadowLCR &= ~(LCR_BITS_MASK | LCR_STOP_MASK | LCR_PAR_MASK);
2530         edge_port->shadowLCR |= (lData | lParity | lStop);
2531
2532         edge_port->validDataMask = mask;
2533
2534         /* Send the updated LCR value to the EdgePort */
2535         status = send_cmd_write_uart_register(edge_port, LCR,
2536                                                         edge_port->shadowLCR);
2537         if (status != 0)
2538                 return;
2539
2540         /* set up the MCR register and send it to the EdgePort */
2541         edge_port->shadowMCR = MCR_MASTER_IE;
2542         if (cflag & CBAUD)
2543                 edge_port->shadowMCR |= (MCR_DTR | MCR_RTS);
2544
2545         status = send_cmd_write_uart_register(edge_port, MCR,
2546                                                 edge_port->shadowMCR);
2547         if (status != 0)
2548                 return;
2549
2550         /* Determine divisor based on baud rate */
2551         baud = tty_get_baud_rate(tty);
2552         if (!baud) {
2553                 /* pick a default, any default... */
2554                 baud = 9600;
2555         }
2556
2557         dev_dbg(dev, "%s - baud rate = %d\n", __func__, baud);
2558         status = send_cmd_write_baud_rate(edge_port, baud);
2559         if (status == -1) {
2560                 /* Speed change was not possible - put back the old speed */
2561                 baud = tty_termios_baud_rate(old_termios);
2562                 tty_encode_baud_rate(tty, baud, baud);
2563         }
2564 }
2565
2566
2567 /****************************************************************************
2568  * unicode_to_ascii
2569  *      Turns a string from Unicode into ASCII.
2570  *      Doesn't do a good job with any characters that are outside the normal
2571  *      ASCII range, but it's only for debugging...
2572  *      NOTE: expects the unicode in LE format
2573  ****************************************************************************/
2574 static void unicode_to_ascii(char *string, int buflen,
2575                                         __le16 *unicode, int unicode_size)
2576 {
2577         int i;
2578
2579         if (buflen <= 0)        /* never happens, but... */
2580                 return;
2581         --buflen;               /* space for nul */
2582
2583         for (i = 0; i < unicode_size; i++) {
2584                 if (i >= buflen)
2585                         break;
2586                 string[i] = (char)(le16_to_cpu(unicode[i]));
2587         }
2588         string[i] = 0x00;
2589 }
2590
2591
2592 /****************************************************************************
2593  * get_manufacturing_desc
2594  *      reads in the manufacturing descriptor and stores it into the serial
2595  *      structure.
2596  ****************************************************************************/
2597 static void get_manufacturing_desc(struct edgeport_serial *edge_serial)
2598 {
2599         struct device *dev = &edge_serial->serial->dev->dev;
2600         int response;
2601
2602         dev_dbg(dev, "getting manufacturer descriptor\n");
2603
2604         response = rom_read(edge_serial->serial,
2605                                 (EDGE_MANUF_DESC_ADDR & 0xffff0000) >> 16,
2606                                 (__u16)(EDGE_MANUF_DESC_ADDR & 0x0000ffff),
2607                                 EDGE_MANUF_DESC_LEN,
2608                                 (__u8 *)(&edge_serial->manuf_descriptor));
2609
2610         if (response < 0) {
2611                 dev_err(dev, "error in getting manufacturer descriptor: %d\n",
2612                                 response);
2613         } else {
2614                 char string[30];
2615                 dev_dbg(dev, "**Manufacturer Descriptor\n");
2616                 dev_dbg(dev, "  RomSize:        %dK\n",
2617                         edge_serial->manuf_descriptor.RomSize);
2618                 dev_dbg(dev, "  RamSize:        %dK\n",
2619                         edge_serial->manuf_descriptor.RamSize);
2620                 dev_dbg(dev, "  CpuRev:         %d\n",
2621                         edge_serial->manuf_descriptor.CpuRev);
2622                 dev_dbg(dev, "  BoardRev:       %d\n",
2623                         edge_serial->manuf_descriptor.BoardRev);
2624                 dev_dbg(dev, "  NumPorts:       %d\n",
2625                         edge_serial->manuf_descriptor.NumPorts);
2626                 dev_dbg(dev, "  DescDate:       %d/%d/%d\n",
2627                         edge_serial->manuf_descriptor.DescDate[0],
2628                         edge_serial->manuf_descriptor.DescDate[1],
2629                         edge_serial->manuf_descriptor.DescDate[2]+1900);
2630                 unicode_to_ascii(string, sizeof(string),
2631                         edge_serial->manuf_descriptor.SerialNumber,
2632                         edge_serial->manuf_descriptor.SerNumLength/2);
2633                 dev_dbg(dev, "  SerialNumber: %s\n", string);
2634                 unicode_to_ascii(string, sizeof(string),
2635                         edge_serial->manuf_descriptor.AssemblyNumber,
2636                         edge_serial->manuf_descriptor.AssemblyNumLength/2);
2637                 dev_dbg(dev, "  AssemblyNumber: %s\n", string);
2638                 unicode_to_ascii(string, sizeof(string),
2639                     edge_serial->manuf_descriptor.OemAssyNumber,
2640                     edge_serial->manuf_descriptor.OemAssyNumLength/2);
2641                 dev_dbg(dev, "  OemAssyNumber:  %s\n", string);
2642                 dev_dbg(dev, "  UartType:       %d\n",
2643                         edge_serial->manuf_descriptor.UartType);
2644                 dev_dbg(dev, "  IonPid:         %d\n",
2645                         edge_serial->manuf_descriptor.IonPid);
2646                 dev_dbg(dev, "  IonConfig:      %d\n",
2647                         edge_serial->manuf_descriptor.IonConfig);
2648         }
2649 }
2650
2651
2652 /****************************************************************************
2653  * get_boot_desc
2654  *      reads in the bootloader descriptor and stores it into the serial
2655  *      structure.
2656  ****************************************************************************/
2657 static void get_boot_desc(struct edgeport_serial *edge_serial)
2658 {
2659         struct device *dev = &edge_serial->serial->dev->dev;
2660         int response;
2661
2662         dev_dbg(dev, "getting boot descriptor\n");
2663
2664         response = rom_read(edge_serial->serial,
2665                                 (EDGE_BOOT_DESC_ADDR & 0xffff0000) >> 16,
2666                                 (__u16)(EDGE_BOOT_DESC_ADDR & 0x0000ffff),
2667                                 EDGE_BOOT_DESC_LEN,
2668                                 (__u8 *)(&edge_serial->boot_descriptor));
2669
2670         if (response < 0) {
2671                 dev_err(dev, "error in getting boot descriptor: %d\n",
2672                                 response);
2673         } else {
2674                 dev_dbg(dev, "**Boot Descriptor:\n");
2675                 dev_dbg(dev, "  BootCodeLength: %d\n",
2676                         le16_to_cpu(edge_serial->boot_descriptor.BootCodeLength));
2677                 dev_dbg(dev, "  MajorVersion:   %d\n",
2678                         edge_serial->boot_descriptor.MajorVersion);
2679                 dev_dbg(dev, "  MinorVersion:   %d\n",
2680                         edge_serial->boot_descriptor.MinorVersion);
2681                 dev_dbg(dev, "  BuildNumber:    %d\n",
2682                         le16_to_cpu(edge_serial->boot_descriptor.BuildNumber));
2683                 dev_dbg(dev, "  Capabilities:   0x%x\n",
2684                       le16_to_cpu(edge_serial->boot_descriptor.Capabilities));
2685                 dev_dbg(dev, "  UConfig0:       %d\n",
2686                         edge_serial->boot_descriptor.UConfig0);
2687                 dev_dbg(dev, "  UConfig1:       %d\n",
2688                         edge_serial->boot_descriptor.UConfig1);
2689         }
2690 }
2691
2692
2693 /****************************************************************************
2694  * load_application_firmware
2695  *      This is called to load the application firmware to the device
2696  ****************************************************************************/
2697 static void load_application_firmware(struct edgeport_serial *edge_serial)
2698 {
2699         struct device *dev = &edge_serial->serial->dev->dev;
2700         const struct ihex_binrec *rec;
2701         const struct firmware *fw;
2702         const char *fw_name;
2703         const char *fw_info;
2704         int response;
2705         __u32 Operaddr;
2706         __u16 build;
2707
2708         switch (edge_serial->product_info.iDownloadFile) {
2709                 case EDGE_DOWNLOAD_FILE_I930:
2710                         fw_info = "downloading firmware version (930)";
2711                         fw_name = "/*(DEBLOBBED)*/";
2712                         break;
2713
2714                 case EDGE_DOWNLOAD_FILE_80251:
2715                         fw_info = "downloading firmware version (80251)";
2716                         fw_name = "/*(DEBLOBBED)*/";
2717                         break;
2718
2719                 case EDGE_DOWNLOAD_FILE_NONE:
2720                         dev_dbg(dev, "No download file specified, skipping download\n");
2721                         return;
2722
2723                 default:
2724                         return;
2725         }
2726
2727         response = reject_firmware(&fw, fw_name,
2728                                     &edge_serial->serial->dev->dev);
2729         if (response) {
2730                 dev_err(dev, "Failed to load image \"%s\" err %d\n",
2731                        fw_name, response);
2732                 return;
2733         }
2734
2735         rec = (const struct ihex_binrec *)fw->data;
2736         build = (rec->data[2] << 8) | rec->data[3];
2737
2738         dev_dbg(dev, "%s %d.%d.%d\n", fw_info, rec->data[0], rec->data[1], build);
2739
2740         edge_serial->product_info.FirmwareMajorVersion = rec->data[0];
2741         edge_serial->product_info.FirmwareMinorVersion = rec->data[1];
2742         edge_serial->product_info.FirmwareBuildNumber = cpu_to_le16(build);
2743
2744         for (rec = ihex_next_binrec(rec); rec;
2745              rec = ihex_next_binrec(rec)) {
2746                 Operaddr = be32_to_cpu(rec->addr);
2747                 response = sram_write(edge_serial->serial,
2748                                      Operaddr >> 16,
2749                                      Operaddr & 0xFFFF,
2750                                      be16_to_cpu(rec->len),
2751                                      &rec->data[0]);
2752                 if (response < 0) {
2753                         dev_err(&edge_serial->serial->dev->dev,
2754                                 "sram_write failed (%x, %x, %d)\n",
2755                                 Operaddr >> 16, Operaddr & 0xFFFF,
2756                                 be16_to_cpu(rec->len));
2757                         break;
2758                 }
2759         }
2760
2761         dev_dbg(dev, "sending exec_dl_code\n");
2762         response = usb_control_msg (edge_serial->serial->dev,
2763                                     usb_sndctrlpipe(edge_serial->serial->dev, 0),
2764                                     USB_REQUEST_ION_EXEC_DL_CODE,
2765                                     0x40, 0x4000, 0x0001, NULL, 0, 3000);
2766
2767         release_firmware(fw);
2768 }
2769
2770
2771 /****************************************************************************
2772  * edge_startup
2773  ****************************************************************************/
2774 static int edge_startup(struct usb_serial *serial)
2775 {
2776         struct edgeport_serial *edge_serial;
2777         struct usb_device *dev;
2778         struct device *ddev = &serial->dev->dev;
2779         int i;
2780         int response;
2781         bool interrupt_in_found;
2782         bool bulk_in_found;
2783         bool bulk_out_found;
2784         static __u32 descriptor[3] = {  EDGE_COMPATIBILITY_MASK0,
2785                                         EDGE_COMPATIBILITY_MASK1,
2786                                         EDGE_COMPATIBILITY_MASK2 };
2787
2788         if (serial->num_bulk_in < 1 || serial->num_interrupt_in < 1) {
2789                 dev_err(&serial->interface->dev, "missing endpoints\n");
2790                 return -ENODEV;
2791         }
2792
2793         dev = serial->dev;
2794
2795         /* create our private serial structure */
2796         edge_serial = kzalloc(sizeof(struct edgeport_serial), GFP_KERNEL);
2797         if (!edge_serial)
2798                 return -ENOMEM;
2799
2800         spin_lock_init(&edge_serial->es_lock);
2801         edge_serial->serial = serial;
2802         usb_set_serial_data(serial, edge_serial);
2803
2804         /* get the name for the device from the device */
2805         i = usb_string(dev, dev->descriptor.iManufacturer,
2806             &edge_serial->name[0], MAX_NAME_LEN+1);
2807         if (i < 0)
2808                 i = 0;
2809         edge_serial->name[i++] = ' ';
2810         usb_string(dev, dev->descriptor.iProduct,
2811             &edge_serial->name[i], MAX_NAME_LEN+2 - i);
2812
2813         dev_info(&serial->dev->dev, "%s detected\n", edge_serial->name);
2814
2815         /* Read the epic descriptor */
2816         if (get_epic_descriptor(edge_serial) < 0) {
2817                 /* memcpy descriptor to Supports structures */
2818                 memcpy(&edge_serial->epic_descriptor.Supports, descriptor,
2819                        sizeof(struct edge_compatibility_bits));
2820
2821                 /* get the manufacturing descriptor for this device */
2822                 get_manufacturing_desc(edge_serial);
2823
2824                 /* get the boot descriptor */
2825                 get_boot_desc(edge_serial);
2826
2827                 get_product_info(edge_serial);
2828         }
2829
2830         /* set the number of ports from the manufacturing description */
2831         /* serial->num_ports = serial->product_info.NumPorts; */
2832         if ((!edge_serial->is_epic) &&
2833             (edge_serial->product_info.NumPorts != serial->num_ports)) {
2834                 dev_warn(ddev,
2835                         "Device Reported %d serial ports vs. core thinking we have %d ports, email greg@kroah.com this information.\n",
2836                          edge_serial->product_info.NumPorts,
2837                          serial->num_ports);
2838         }
2839
2840         dev_dbg(ddev, "%s - time 1 %ld\n", __func__, jiffies);
2841
2842         /* If not an EPiC device */
2843         if (!edge_serial->is_epic) {
2844                 /* now load the application firmware into this device */
2845                 load_application_firmware(edge_serial);
2846
2847                 dev_dbg(ddev, "%s - time 2 %ld\n", __func__, jiffies);
2848
2849                 /* Check current Edgeport EEPROM and update if necessary */
2850                 update_edgeport_E2PROM(edge_serial);
2851
2852                 dev_dbg(ddev, "%s - time 3 %ld\n", __func__, jiffies);
2853
2854                 /* set the configuration to use #1 */
2855 /*              dev_dbg(ddev, "set_configuration 1\n"); */
2856 /*              usb_set_configuration (dev, 1); */
2857         }
2858         dev_dbg(ddev, "  FirmwareMajorVersion  %d.%d.%d\n",
2859             edge_serial->product_info.FirmwareMajorVersion,
2860             edge_serial->product_info.FirmwareMinorVersion,
2861             le16_to_cpu(edge_serial->product_info.FirmwareBuildNumber));
2862
2863         /* we set up the pointers to the endpoints in the edge_open function,
2864          * as the structures aren't created yet. */
2865
2866         response = 0;
2867
2868         if (edge_serial->is_epic) {
2869                 struct usb_host_interface *alt;
2870
2871                 alt = serial->interface->cur_altsetting;
2872
2873                 /* EPIC thing, set up our interrupt polling now and our read
2874                  * urb, so that the device knows it really is connected. */
2875                 interrupt_in_found = bulk_in_found = bulk_out_found = false;
2876                 for (i = 0; i < alt->desc.bNumEndpoints; ++i) {
2877                         struct usb_endpoint_descriptor *endpoint;
2878                         int buffer_size;
2879
2880                         endpoint = &alt->endpoint[i].desc;
2881                         buffer_size = usb_endpoint_maxp(endpoint);
2882                         if (!interrupt_in_found &&
2883                             (usb_endpoint_is_int_in(endpoint))) {
2884                                 /* we found a interrupt in endpoint */
2885                                 dev_dbg(ddev, "found interrupt in\n");
2886
2887                                 /* not set up yet, so do it now */
2888                                 edge_serial->interrupt_read_urb =
2889                                                 usb_alloc_urb(0, GFP_KERNEL);
2890                                 if (!edge_serial->interrupt_read_urb) {
2891                                         response = -ENOMEM;
2892                                         break;
2893                                 }
2894
2895                                 edge_serial->interrupt_in_buffer =
2896                                         kmalloc(buffer_size, GFP_KERNEL);
2897                                 if (!edge_serial->interrupt_in_buffer) {
2898                                         response = -ENOMEM;
2899                                         break;
2900                                 }
2901                                 edge_serial->interrupt_in_endpoint =
2902                                                 endpoint->bEndpointAddress;
2903
2904                                 /* set up our interrupt urb */
2905                                 usb_fill_int_urb(
2906                                         edge_serial->interrupt_read_urb,
2907                                         dev,
2908                                         usb_rcvintpipe(dev,
2909                                                 endpoint->bEndpointAddress),
2910                                         edge_serial->interrupt_in_buffer,
2911                                         buffer_size,
2912                                         edge_interrupt_callback,
2913                                         edge_serial,
2914                                         endpoint->bInterval);
2915
2916                                 interrupt_in_found = true;
2917                         }
2918
2919                         if (!bulk_in_found &&
2920                                 (usb_endpoint_is_bulk_in(endpoint))) {
2921                                 /* we found a bulk in endpoint */
2922                                 dev_dbg(ddev, "found bulk in\n");
2923
2924                                 /* not set up yet, so do it now */
2925                                 edge_serial->read_urb =
2926                                                 usb_alloc_urb(0, GFP_KERNEL);
2927                                 if (!edge_serial->read_urb) {
2928                                         response = -ENOMEM;
2929                                         break;
2930                                 }
2931
2932                                 edge_serial->bulk_in_buffer =
2933                                         kmalloc(buffer_size, GFP_KERNEL);
2934                                 if (!edge_serial->bulk_in_buffer) {
2935                                         response = -ENOMEM;
2936                                         break;
2937                                 }
2938                                 edge_serial->bulk_in_endpoint =
2939                                                 endpoint->bEndpointAddress;
2940
2941                                 /* set up our bulk in urb */
2942                                 usb_fill_bulk_urb(edge_serial->read_urb, dev,
2943                                         usb_rcvbulkpipe(dev,
2944                                                 endpoint->bEndpointAddress),
2945                                         edge_serial->bulk_in_buffer,
2946                                         usb_endpoint_maxp(endpoint),
2947                                         edge_bulk_in_callback,
2948                                         edge_serial);
2949                                 bulk_in_found = true;
2950                         }
2951
2952                         if (!bulk_out_found &&
2953                             (usb_endpoint_is_bulk_out(endpoint))) {
2954                                 /* we found a bulk out endpoint */
2955                                 dev_dbg(ddev, "found bulk out\n");
2956                                 edge_serial->bulk_out_endpoint =
2957                                                 endpoint->bEndpointAddress;
2958                                 bulk_out_found = true;
2959                         }
2960                 }
2961
2962                 if (response || !interrupt_in_found || !bulk_in_found ||
2963                                                         !bulk_out_found) {
2964                         if (!response) {
2965                                 dev_err(ddev, "expected endpoints not found\n");
2966                                 response = -ENODEV;
2967                         }
2968
2969                         goto error;
2970                 }
2971
2972                 /* start interrupt read for this edgeport this interrupt will
2973                  * continue as long as the edgeport is connected */
2974                 response = usb_submit_urb(edge_serial->interrupt_read_urb,
2975                                                                 GFP_KERNEL);
2976                 if (response) {
2977                         dev_err(ddev, "%s - Error %d submitting control urb\n",
2978                                 __func__, response);
2979
2980                         goto error;
2981                 }
2982         }
2983         return response;
2984
2985 error:
2986         usb_free_urb(edge_serial->interrupt_read_urb);
2987         kfree(edge_serial->interrupt_in_buffer);
2988
2989         usb_free_urb(edge_serial->read_urb);
2990         kfree(edge_serial->bulk_in_buffer);
2991
2992         kfree(edge_serial);
2993
2994         return response;
2995 }
2996
2997
2998 /****************************************************************************
2999  * edge_disconnect
3000  *      This function is called whenever the device is removed from the usb bus.
3001  ****************************************************************************/
3002 static void edge_disconnect(struct usb_serial *serial)
3003 {
3004         struct edgeport_serial *edge_serial = usb_get_serial_data(serial);
3005
3006         if (edge_serial->is_epic) {
3007                 usb_kill_urb(edge_serial->interrupt_read_urb);
3008                 usb_kill_urb(edge_serial->read_urb);
3009         }
3010 }
3011
3012
3013 /****************************************************************************
3014  * edge_release
3015  *      This function is called when the device structure is deallocated.
3016  ****************************************************************************/
3017 static void edge_release(struct usb_serial *serial)
3018 {
3019         struct edgeport_serial *edge_serial = usb_get_serial_data(serial);
3020
3021         if (edge_serial->is_epic) {
3022                 usb_kill_urb(edge_serial->interrupt_read_urb);
3023                 usb_free_urb(edge_serial->interrupt_read_urb);
3024                 kfree(edge_serial->interrupt_in_buffer);
3025
3026                 usb_kill_urb(edge_serial->read_urb);
3027                 usb_free_urb(edge_serial->read_urb);
3028                 kfree(edge_serial->bulk_in_buffer);
3029         }
3030
3031         kfree(edge_serial);
3032 }
3033
3034 static int edge_port_probe(struct usb_serial_port *port)
3035 {
3036         struct edgeport_port *edge_port;
3037
3038         edge_port = kzalloc(sizeof(*edge_port), GFP_KERNEL);
3039         if (!edge_port)
3040                 return -ENOMEM;
3041
3042         spin_lock_init(&edge_port->ep_lock);
3043         edge_port->port = port;
3044
3045         usb_set_serial_port_data(port, edge_port);
3046
3047         return 0;
3048 }
3049
3050 static int edge_port_remove(struct usb_serial_port *port)
3051 {
3052         struct edgeport_port *edge_port;
3053
3054         edge_port = usb_get_serial_port_data(port);
3055         kfree(edge_port);
3056
3057         return 0;
3058 }
3059
3060 module_usb_serial_driver(serial_drivers, id_table_combined);
3061
3062 MODULE_AUTHOR(DRIVER_AUTHOR);
3063 MODULE_DESCRIPTION(DRIVER_DESC);
3064 MODULE_LICENSE("GPL");
3065 /*(DEBLOBBED)*/