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         int bytes_avail;
 576         int position;
 577         int txCredits;
 578         int portNumber;
 579         int result;
 580         int status = urb->status;
 581
 582         switch (status) {
 583         case 0:
 584                 /* success */
 585                 break;
 586         case -ECONNRESET:
 587         case -ENOENT:
 588         case -ESHUTDOWN:
 589                 /* this urb is terminated, clean up */
 590                 dev_dbg(&urb->dev->dev, "%s - urb shutting down with status: %d\n", __func__, status);
 591                 return;
 592         default:
 593                 dev_dbg(&urb->dev->dev, "%s - nonzero urb status received: %d\n", __func__, status);
 594                 goto exit;
 595         }
 596
 597         dev = &edge_serial->serial->dev->dev;
 598
 599         /* process this interrupt-read even if there are no ports open */
 600         if (length) {
 601                 usb_serial_debug_data(dev, __func__, length, data);
 602
 603                 if (length > 1) {
 604                         bytes_avail = data[0] | (data[1] << 8);
 605                         if (bytes_avail) {
 606                                 spin_lock(&edge_serial->es_lock);
 607                                 edge_serial->rxBytesAvail += bytes_avail;
 608                                 dev_dbg(dev,
 609                                         "%s - bytes_avail=%d, rxBytesAvail=%d, read_in_progress=%d\n",
 610                                         __func__, bytes_avail,
 611                                         edge_serial->rxBytesAvail,
 612                                         edge_serial->read_in_progress);
 613
 614                                 if (edge_serial->rxBytesAvail > 0 &&
 615                                     !edge_serial->read_in_progress) {
 616                                         dev_dbg(dev, "%s - posting a read\n", __func__);
 617                                         edge_serial->read_in_progress = true;
 618
 619                                         /* we have pending bytes on the
 620                                            bulk in pipe, send a request */
 621                                         result = usb_submit_urb(edge_serial->read_urb, GFP_ATOMIC);
 622                                         if (result) {
 623                                                 dev_err(dev,
 624                                                         "%s - usb_submit_urb(read bulk) failed with result = %d\n",
 625                                                         __func__, result);
 626                                                 edge_serial->read_in_progress = false;
 627                                         }
 628                                 }
 629                                 spin_unlock(&edge_serial->es_lock);
 630                         }
 631                 }
 632                 /* grab the txcredits for the ports if available */
 633                 position = 2;
 634                 portNumber = 0;
 635                 while ((position < length) &&
 636                                 (portNumber < edge_serial->serial->num_ports)) {
 637                         txCredits = data[position] | (data[position+1] << 8);
 638                         if (txCredits) {
 639                                 port = edge_serial->serial->port[portNumber];
 640                                 edge_port = usb_get_serial_port_data(port);
 641                                 if (edge_port && edge_port->open) {
 642                                         spin_lock(&edge_port->ep_lock);
 643                                         edge_port->txCredits += txCredits;
 644                                         spin_unlock(&edge_port->ep_lock);
 645                                         dev_dbg(dev, "%s - txcredits for port%d = %d\n",
 646                                                 __func__, portNumber,
 647                                                 edge_port->txCredits);
 648
 649                                         /* tell the tty driver that something
 650                                            has changed */
 651                                         tty_port_tty_wakeup(&edge_port->port->port);
 652                                         /* Since we have more credit, check
 653                                            if more data can be sent */
 654                                         send_more_port_data(edge_serial,
 655                                                                 edge_port);
 656                                 }
 657                         }
 658                         position += 2;
 659                         ++portNumber;
 660                 }
 661         }
 662
 663 exit:
 664         result = usb_submit_urb(urb, GFP_ATOMIC);
 665         if (result)
 666                 dev_err(&urb->dev->dev,
 667                         "%s - Error %d submitting control urb\n",
 668                                                 __func__, result);
 669 }
 670
 671
 672 /*****************************************************************************
 673  * edge_bulk_in_callback
 674  *      this is the callback function for when we have received data on the
 675  *      bulk in endpoint.
 676  *****************************************************************************/
 677 static void edge_bulk_in_callback(struct urb *urb)
 678 {
 679         struct edgeport_serial  *edge_serial = urb->context;
 680         struct device *dev;
 681         unsigned char           *data = urb->transfer_buffer;
 682         int                     retval;
 683         __u16                   raw_data_length;
 684         int status = urb->status;
 685
 686         if (status) {
 687                 dev_dbg(&urb->dev->dev, "%s - nonzero read bulk status received: %d\n",
 688                         __func__, status);
 689                 edge_serial->read_in_progress = false;
 690                 return;
 691         }
 692
 693         if (urb->actual_length == 0) {
 694                 dev_dbg(&urb->dev->dev, "%s - read bulk callback with no data\n", __func__);
 695                 edge_serial->read_in_progress = false;
 696                 return;
 697         }
 698
 699         dev = &edge_serial->serial->dev->dev;
 700         raw_data_length = urb->actual_length;
 701
 702         usb_serial_debug_data(dev, __func__, raw_data_length, data);
 703
 704         spin_lock(&edge_serial->es_lock);
 705
 706         /* decrement our rxBytes available by the number that we just got */
 707         edge_serial->rxBytesAvail -= raw_data_length;
 708
 709         dev_dbg(dev, "%s - Received = %d, rxBytesAvail %d\n", __func__,
 710                 raw_data_length, edge_serial->rxBytesAvail);
 711
 712         process_rcvd_data(edge_serial, data, urb->actual_length);
 713
 714         /* check to see if there's any more data for us to read */
 715         if (edge_serial->rxBytesAvail > 0) {
 716                 dev_dbg(dev, "%s - posting a read\n", __func__);
 717                 retval = usb_submit_urb(edge_serial->read_urb, GFP_ATOMIC);
 718                 if (retval) {
 719                         dev_err(dev,
 720                                 "%s - usb_submit_urb(read bulk) failed, retval = %d\n",
 721                                 __func__, retval);
 722                         edge_serial->read_in_progress = false;
 723                 }
 724         } else {
 725                 edge_serial->read_in_progress = false;
 726         }
 727
 728         spin_unlock(&edge_serial->es_lock);
 729 }
 730
 731
 732 /*****************************************************************************
 733  * edge_bulk_out_data_callback
 734  *      this is the callback function for when we have finished sending
 735  *      serial data on the bulk out endpoint.
 736  *****************************************************************************/
 737 static void edge_bulk_out_data_callback(struct urb *urb)
 738 {
 739         struct edgeport_port *edge_port = urb->context;
 740         int status = urb->status;
 741
 742         if (status) {
 743                 dev_dbg(&urb->dev->dev,
 744                         "%s - nonzero write bulk status received: %d\n",
 745                         __func__, status);
 746         }
 747
 748         if (edge_port->open)
 749                 tty_port_tty_wakeup(&edge_port->port->port);
 750
 751         /* Release the Write URB */
 752         edge_port->write_in_progress = false;
 753
 754         /* Check if more data needs to be sent */
 755         send_more_port_data((struct edgeport_serial *)
 756                 (usb_get_serial_data(edge_port->port->serial)), edge_port);
 757 }
 758
 759
 760 /*****************************************************************************
 761  * BulkOutCmdCallback
 762  *      this is the callback function for when we have finished sending a
 763  *      command on the bulk out endpoint.
 764  *****************************************************************************/
 765 static void edge_bulk_out_cmd_callback(struct urb *urb)
 766 {
 767         struct edgeport_port *edge_port = urb->context;
 768         int status = urb->status;
 769
 770         atomic_dec(&CmdUrbs);
 771         dev_dbg(&urb->dev->dev, "%s - FREE URB %p (outstanding %d)\n",
 772                 __func__, urb, atomic_read(&CmdUrbs));
 773
 774
 775         /* clean up the transfer buffer */
 776         kfree(urb->transfer_buffer);
 777
 778         /* Free the command urb */
 779         usb_free_urb(urb);
 780
 781         if (status) {
 782                 dev_dbg(&urb->dev->dev,
 783                         "%s - nonzero write bulk status received: %d\n",
 784                         __func__, status);
 785                 return;
 786         }
 787
 788         /* tell the tty driver that something has changed */
 789         if (edge_port->open)
 790                 tty_port_tty_wakeup(&edge_port->port->port);
 791
 792         /* we have completed the command */
 793         edge_port->commandPending = false;
 794         wake_up(&edge_port->wait_command);
 795 }
 796
 797
 798 /*****************************************************************************
 799  * Driver tty interface functions
 800  *****************************************************************************/
 801
 802 /*****************************************************************************
 803  * SerialOpen
 804  *      this function is called by the tty driver when a port is opened
 805  *      If successful, we return 0
 806  *      Otherwise we return a negative error number.
 807  *****************************************************************************/
 808 static int edge_open(struct tty_struct *tty, struct usb_serial_port *port)
 809 {
 810         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
 811         struct device *dev = &port->dev;
 812         struct usb_serial *serial;
 813         struct edgeport_serial *edge_serial;
 814         int response;
 815
 816         if (edge_port == NULL)
 817                 return -ENODEV;
 818
 819         /* see if we've set up our endpoint info yet (can't set it up
 820            in edge_startup as the structures were not set up at that time.) */
 821         serial = port->serial;
 822         edge_serial = usb_get_serial_data(serial);
 823         if (edge_serial == NULL)
 824                 return -ENODEV;
 825         if (edge_serial->interrupt_in_buffer == NULL) {
 826                 struct usb_serial_port *port0 = serial->port[0];
 827
 828                 /* not set up yet, so do it now */
 829                 edge_serial->interrupt_in_buffer =
 830                                         port0->interrupt_in_buffer;
 831                 edge_serial->interrupt_in_endpoint =
 832                                         port0->interrupt_in_endpointAddress;
 833                 edge_serial->interrupt_read_urb = port0->interrupt_in_urb;
 834                 edge_serial->bulk_in_buffer = port0->bulk_in_buffer;
 835                 edge_serial->bulk_in_endpoint =
 836                                         port0->bulk_in_endpointAddress;
 837                 edge_serial->read_urb = port0->read_urb;
 838                 edge_serial->bulk_out_endpoint =
 839                                         port0->bulk_out_endpointAddress;
 840
 841                 /* set up our interrupt urb */
 842                 usb_fill_int_urb(edge_serial->interrupt_read_urb,
 843                       serial->dev,
 844                       usb_rcvintpipe(serial->dev,
 845                                 port0->interrupt_in_endpointAddress),
 846                       port0->interrupt_in_buffer,
 847                       edge_serial->interrupt_read_urb->transfer_buffer_length,
 848                       edge_interrupt_callback, edge_serial,
 849                       edge_serial->interrupt_read_urb->interval);
 850
 851                 /* set up our bulk in urb */
 852                 usb_fill_bulk_urb(edge_serial->read_urb, serial->dev,
 853                         usb_rcvbulkpipe(serial->dev,
 854                                 port0->bulk_in_endpointAddress),
 855                         port0->bulk_in_buffer,
 856                         edge_serial->read_urb->transfer_buffer_length,
 857                         edge_bulk_in_callback, edge_serial);
 858                 edge_serial->read_in_progress = false;
 859
 860                 /* start interrupt read for this edgeport
 861                  * this interrupt will continue as long
 862                  * as the edgeport is connected */
 863                 response = usb_submit_urb(edge_serial->interrupt_read_urb,
 864                                                                 GFP_KERNEL);
 865                 if (response) {
 866                         dev_err(dev, "%s - Error %d submitting control urb\n",
 867                                 __func__, response);
 868                 }
 869         }
 870
 871         /* initialize our wait queues */
 872         init_waitqueue_head(&edge_port->wait_open);
 873         init_waitqueue_head(&edge_port->wait_chase);
 874         init_waitqueue_head(&edge_port->wait_command);
 875
 876         /* initialize our port settings */
 877         edge_port->txCredits = 0;       /* Can't send any data yet */
 878         /* Must always set this bit to enable ints! */
 879         edge_port->shadowMCR = MCR_MASTER_IE;
 880         edge_port->chaseResponsePending = false;
 881
 882         /* send a open port command */
 883         edge_port->openPending = true;
 884         edge_port->open        = false;
 885         response = send_iosp_ext_cmd(edge_port, IOSP_CMD_OPEN_PORT, 0);
 886
 887         if (response < 0) {
 888                 dev_err(dev, "%s - error sending open port command\n", __func__);
 889                 edge_port->openPending = false;
 890                 return -ENODEV;
 891         }
 892
 893         /* now wait for the port to be completely opened */
 894         wait_event_timeout(edge_port->wait_open, !edge_port->openPending,
 895                                                                 OPEN_TIMEOUT);
 896
 897         if (!edge_port->open) {
 898                 /* open timed out */
 899                 dev_dbg(dev, "%s - open timedout\n", __func__);
 900                 edge_port->openPending = false;
 901                 return -ENODEV;
 902         }
 903
 904         /* create the txfifo */
 905         edge_port->txfifo.head  = 0;
 906         edge_port->txfifo.tail  = 0;
 907         edge_port->txfifo.count = 0;
 908         edge_port->txfifo.size  = edge_port->maxTxCredits;
 909         edge_port->txfifo.fifo  = kmalloc(edge_port->maxTxCredits, GFP_KERNEL);
 910
 911         if (!edge_port->txfifo.fifo) {
 912                 edge_close(port);
 913                 return -ENOMEM;
 914         }
 915
 916         /* Allocate a URB for the write */
 917         edge_port->write_urb = usb_alloc_urb(0, GFP_KERNEL);
 918         edge_port->write_in_progress = false;
 919
 920         if (!edge_port->write_urb) {
 921                 edge_close(port);
 922                 return -ENOMEM;
 923         }
 924
 925         dev_dbg(dev, "%s - Initialize TX fifo to %d bytes\n",
 926                 __func__, edge_port->maxTxCredits);
 927
 928         return 0;
 929 }
 930
 931
 932 /************************************************************************
 933  *
 934  * block_until_chase_response
 935  *
 936  *      This function will block the close until one of the following:
 937  *              1. Response to our Chase comes from Edgeport
 938  *              2. A timeout of 10 seconds without activity has expired
 939  *                 (1K of Edgeport data @ 2400 baud ==> 4 sec to empty)
 940  *
 941  ************************************************************************/
 942 static void block_until_chase_response(struct edgeport_port *edge_port)
 943 {
 944         struct device *dev = &edge_port->port->dev;
 945         DEFINE_WAIT(wait);
 946         __u16 lastCredits;
 947         int timeout = 1*HZ;
 948         int loop = 10;
 949
 950         while (1) {
 951                 /* Save Last credits */
 952                 lastCredits = edge_port->txCredits;
 953
 954                 /* Did we get our Chase response */
 955                 if (!edge_port->chaseResponsePending) {
 956                         dev_dbg(dev, "%s - Got Chase Response\n", __func__);
 957
 958                         /* did we get all of our credit back? */
 959                         if (edge_port->txCredits == edge_port->maxTxCredits) {
 960                                 dev_dbg(dev, "%s - Got all credits\n", __func__);
 961                                 return;
 962                         }
 963                 }
 964
 965                 /* Block the thread for a while */
 966                 prepare_to_wait(&edge_port->wait_chase, &wait,
 967                                                 TASK_UNINTERRUPTIBLE);
 968                 schedule_timeout(timeout);
 969                 finish_wait(&edge_port->wait_chase, &wait);
 970
 971                 if (lastCredits == edge_port->txCredits) {
 972                         /* No activity.. count down. */
 973                         loop--;
 974                         if (loop == 0) {
 975                                 edge_port->chaseResponsePending = false;
 976                                 dev_dbg(dev, "%s - Chase TIMEOUT\n", __func__);
 977                                 return;
 978                         }
 979                 } else {
 980                         /* Reset timeout value back to 10 seconds */
 981                         dev_dbg(dev, "%s - Last %d, Current %d\n", __func__,
 982                                         lastCredits, edge_port->txCredits);
 983                         loop = 10;
 984                 }
 985         }
 986 }
 987
 988
 989 /************************************************************************
 990  *
 991  * block_until_tx_empty
 992  *
 993  *      This function will block the close until one of the following:
 994  *              1. TX count are 0
 995  *              2. The edgeport has stopped
 996  *              3. A timeout of 3 seconds without activity has expired
 997  *
 998  ************************************************************************/
 999 static void block_until_tx_empty(struct edgeport_port *edge_port)
1000 {
1001         struct device *dev = &edge_port->port->dev;
1002         DEFINE_WAIT(wait);
1003         struct TxFifo *fifo = &edge_port->txfifo;
1004         __u32 lastCount;
1005         int timeout = HZ/10;
1006         int loop = 30;
1007
1008         while (1) {
1009                 /* Save Last count */
1010                 lastCount = fifo->count;
1011
1012                 /* Is the Edgeport Buffer empty? */
1013                 if (lastCount == 0) {
1014                         dev_dbg(dev, "%s - TX Buffer Empty\n", __func__);
1015                         return;
1016                 }
1017
1018                 /* Block the thread for a while */
1019                 prepare_to_wait(&edge_port->wait_chase, &wait,
1020                                                 TASK_UNINTERRUPTIBLE);
1021                 schedule_timeout(timeout);
1022                 finish_wait(&edge_port->wait_chase, &wait);
1023
1024                 dev_dbg(dev, "%s wait\n", __func__);
1025
1026                 if (lastCount == fifo->count) {
1027                         /* No activity.. count down. */
1028                         loop--;
1029                         if (loop == 0) {
1030                                 dev_dbg(dev, "%s - TIMEOUT\n", __func__);
1031                                 return;
1032                         }
1033                 } else {
1034                         /* Reset timeout value back to seconds */
1035                         loop = 30;
1036                 }
1037         }
1038 }
1039
1040
1041 /*****************************************************************************
1042  * edge_close
1043  *      this function is called by the tty driver when a port is closed
1044  *****************************************************************************/
1045 static void edge_close(struct usb_serial_port *port)
1046 {
1047         struct edgeport_serial *edge_serial;
1048         struct edgeport_port *edge_port;
1049         int status;
1050
1051         edge_serial = usb_get_serial_data(port->serial);
1052         edge_port = usb_get_serial_port_data(port);
1053         if (edge_serial == NULL || edge_port == NULL)
1054                 return;
1055
1056         /* block until tx is empty */
1057         block_until_tx_empty(edge_port);
1058
1059         edge_port->closePending = true;
1060
1061         if ((!edge_serial->is_epic) ||
1062             ((edge_serial->is_epic) &&
1063              (edge_serial->epic_descriptor.Supports.IOSPChase))) {
1064                 /* flush and chase */
1065                 edge_port->chaseResponsePending = true;
1066
1067                 dev_dbg(&port->dev, "%s - Sending IOSP_CMD_CHASE_PORT\n", __func__);
1068                 status = send_iosp_ext_cmd(edge_port, IOSP_CMD_CHASE_PORT, 0);
1069                 if (status == 0)
1070                         /* block until chase finished */
1071                         block_until_chase_response(edge_port);
1072                 else
1073                         edge_port->chaseResponsePending = false;
1074         }
1075
1076         if ((!edge_serial->is_epic) ||
1077             ((edge_serial->is_epic) &&
1078              (edge_serial->epic_descriptor.Supports.IOSPClose))) {
1079                /* close the port */
1080                 dev_dbg(&port->dev, "%s - Sending IOSP_CMD_CLOSE_PORT\n", __func__);
1081                 send_iosp_ext_cmd(edge_port, IOSP_CMD_CLOSE_PORT, 0);
1082         }
1083
1084         /* port->close = true; */
1085         edge_port->closePending = false;
1086         edge_port->open = false;
1087         edge_port->openPending = false;
1088
1089         usb_kill_urb(edge_port->write_urb);
1090
1091         if (edge_port->write_urb) {
1092                 /* if this urb had a transfer buffer already
1093                                 (old transfer) free it */
1094                 kfree(edge_port->write_urb->transfer_buffer);
1095                 usb_free_urb(edge_port->write_urb);
1096                 edge_port->write_urb = NULL;
1097         }
1098         kfree(edge_port->txfifo.fifo);
1099         edge_port->txfifo.fifo = NULL;
1100 }
1101
1102 /*****************************************************************************
1103  * SerialWrite
1104  *      this function is called by the tty driver when data should be written
1105  *      to the port.
1106  *      If successful, we return the number of bytes written, otherwise we
1107  *      return a negative error number.
1108  *****************************************************************************/
1109 static int edge_write(struct tty_struct *tty, struct usb_serial_port *port,
1110                                         const unsigned char *data, int count)
1111 {
1112         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1113         struct TxFifo *fifo;
1114         int copySize;
1115         int bytesleft;
1116         int firsthalf;
1117         int secondhalf;
1118         unsigned long flags;
1119
1120         if (edge_port == NULL)
1121                 return -ENODEV;
1122
1123         /* get a pointer to the Tx fifo */
1124         fifo = &edge_port->txfifo;
1125
1126         spin_lock_irqsave(&edge_port->ep_lock, flags);
1127
1128         /* calculate number of bytes to put in fifo */
1129         copySize = min((unsigned int)count,
1130                                 (edge_port->txCredits - fifo->count));
1131
1132         dev_dbg(&port->dev, "%s of %d byte(s) Fifo room  %d -- will copy %d bytes\n",
1133                 __func__, count, edge_port->txCredits - fifo->count, copySize);
1134
1135         /* catch writes of 0 bytes which the tty driver likes to give us,
1136            and when txCredits is empty */
1137         if (copySize == 0) {
1138                 dev_dbg(&port->dev, "%s - copySize = Zero\n", __func__);
1139                 goto finish_write;
1140         }
1141
1142         /* queue the data
1143          * since we can never overflow the buffer we do not have to check for a
1144          * full condition
1145          *
1146          * the copy is done is two parts -- first fill to the end of the buffer
1147          * then copy the reset from the start of the buffer
1148          */
1149         bytesleft = fifo->size - fifo->head;
1150         firsthalf = min(bytesleft, copySize);
1151         dev_dbg(&port->dev, "%s - copy %d bytes of %d into fifo \n", __func__,
1152                 firsthalf, bytesleft);
1153
1154         /* now copy our data */
1155         memcpy(&fifo->fifo[fifo->head], data, firsthalf);
1156         usb_serial_debug_data(&port->dev, __func__, firsthalf, &fifo->fifo[fifo->head]);
1157
1158         /* update the index and size */
1159         fifo->head  += firsthalf;
1160         fifo->count += firsthalf;
1161
1162         /* wrap the index */
1163         if (fifo->head == fifo->size)
1164                 fifo->head = 0;
1165
1166         secondhalf = copySize-firsthalf;
1167
1168         if (secondhalf) {
1169                 dev_dbg(&port->dev, "%s - copy rest of data %d\n", __func__, secondhalf);
1170                 memcpy(&fifo->fifo[fifo->head], &data[firsthalf], secondhalf);
1171                 usb_serial_debug_data(&port->dev, __func__, secondhalf, &fifo->fifo[fifo->head]);
1172                 /* update the index and size */
1173                 fifo->count += secondhalf;
1174                 fifo->head  += secondhalf;
1175                 /* No need to check for wrap since we can not get to end of
1176                  * the fifo in this part
1177                  */
1178         }
1179
1180 finish_write:
1181         spin_unlock_irqrestore(&edge_port->ep_lock, flags);
1182
1183         send_more_port_data((struct edgeport_serial *)
1184                         usb_get_serial_data(port->serial), edge_port);
1185
1186         dev_dbg(&port->dev, "%s wrote %d byte(s) TxCredits %d, Fifo %d\n",
1187                 __func__, copySize, edge_port->txCredits, fifo->count);
1188
1189         return copySize;
1190 }
1191
1192
1193 /************************************************************************
1194  *
1195  * send_more_port_data()
1196  *
1197  *      This routine attempts to write additional UART transmit data
1198  *      to a port over the USB bulk pipe. It is called (1) when new
1199  *      data has been written to a port's TxBuffer from higher layers
1200  *      (2) when the peripheral sends us additional TxCredits indicating
1201  *      that it can accept more Tx data for a given port; and (3) when
1202  *      a bulk write completes successfully and we want to see if we
1203  *      can transmit more.
1204  *
1205  ************************************************************************/
1206 static void send_more_port_data(struct edgeport_serial *edge_serial,
1207                                         struct edgeport_port *edge_port)
1208 {
1209         struct TxFifo   *fifo = &edge_port->txfifo;
1210         struct device   *dev = &edge_port->port->dev;
1211         struct urb      *urb;
1212         unsigned char   *buffer;
1213         int             status;
1214         int             count;
1215         int             bytesleft;
1216         int             firsthalf;
1217         int             secondhalf;
1218         unsigned long   flags;
1219
1220         spin_lock_irqsave(&edge_port->ep_lock, flags);
1221
1222         if (edge_port->write_in_progress ||
1223             !edge_port->open             ||
1224             (fifo->count == 0)) {
1225                 dev_dbg(dev, "%s EXIT - fifo %d, PendingWrite = %d\n",
1226                         __func__, fifo->count, edge_port->write_in_progress);
1227                 goto exit_send;
1228         }
1229
1230         /* since the amount of data in the fifo will always fit into the
1231          * edgeport buffer we do not need to check the write length
1232          *
1233          * Do we have enough credits for this port to make it worthwhile
1234          * to bother queueing a write. If it's too small, say a few bytes,
1235          * it's better to wait for more credits so we can do a larger write.
1236          */
1237         if (edge_port->txCredits < EDGE_FW_GET_TX_CREDITS_SEND_THRESHOLD(edge_port->maxTxCredits, EDGE_FW_BULK_MAX_PACKET_SIZE)) {
1238                 dev_dbg(dev, "%s Not enough credit - fifo %d TxCredit %d\n",
1239                         __func__, fifo->count, edge_port->txCredits);
1240                 goto exit_send;
1241         }
1242
1243         /* lock this write */
1244         edge_port->write_in_progress = true;
1245
1246         /* get a pointer to the write_urb */
1247         urb = edge_port->write_urb;
1248
1249         /* make sure transfer buffer is freed */
1250         kfree(urb->transfer_buffer);
1251         urb->transfer_buffer = NULL;
1252
1253         /* build the data header for the buffer and port that we are about
1254            to send out */
1255         count = fifo->count;
1256         buffer = kmalloc(count+2, GFP_ATOMIC);
1257         if (!buffer) {
1258                 edge_port->write_in_progress = false;
1259                 goto exit_send;
1260         }
1261         buffer[0] = IOSP_BUILD_DATA_HDR1(edge_port->port->port_number, count);
1262         buffer[1] = IOSP_BUILD_DATA_HDR2(edge_port->port->port_number, count);
1263
1264         /* now copy our data */
1265         bytesleft =  fifo->size - fifo->tail;
1266         firsthalf = min(bytesleft, count);
1267         memcpy(&buffer[2], &fifo->fifo[fifo->tail], firsthalf);
1268         fifo->tail  += firsthalf;
1269         fifo->count -= firsthalf;
1270         if (fifo->tail == fifo->size)
1271                 fifo->tail = 0;
1272
1273         secondhalf = count-firsthalf;
1274         if (secondhalf) {
1275                 memcpy(&buffer[2+firsthalf], &fifo->fifo[fifo->tail],
1276                                                                 secondhalf);
1277                 fifo->tail  += secondhalf;
1278                 fifo->count -= secondhalf;
1279         }
1280
1281         if (count)
1282                 usb_serial_debug_data(&edge_port->port->dev, __func__, count, &buffer[2]);
1283
1284         /* fill up the urb with all of our data and submit it */
1285         usb_fill_bulk_urb(urb, edge_serial->serial->dev,
1286                         usb_sndbulkpipe(edge_serial->serial->dev,
1287                                         edge_serial->bulk_out_endpoint),
1288                         buffer, count+2,
1289                         edge_bulk_out_data_callback, edge_port);
1290
1291         /* decrement the number of credits we have by the number we just sent */
1292         edge_port->txCredits -= count;
1293         edge_port->port->icount.tx += count;
1294
1295         status = usb_submit_urb(urb, GFP_ATOMIC);
1296         if (status) {
1297                 /* something went wrong */
1298                 dev_err_console(edge_port->port,
1299                         "%s - usb_submit_urb(write bulk) failed, status = %d, data lost\n",
1300                                 __func__, status);
1301                 edge_port->write_in_progress = false;
1302
1303                 /* revert the credits as something bad happened. */
1304                 edge_port->txCredits += count;
1305                 edge_port->port->icount.tx -= count;
1306         }
1307         dev_dbg(dev, "%s wrote %d byte(s) TxCredit %d, Fifo %d\n",
1308                 __func__, count, edge_port->txCredits, fifo->count);
1309
1310 exit_send:
1311         spin_unlock_irqrestore(&edge_port->ep_lock, flags);
1312 }
1313
1314
1315 /*****************************************************************************
1316  * edge_write_room
1317  *      this function is called by the tty driver when it wants to know how
1318  *      many bytes of data we can accept for a specific port. If successful,
1319  *      we return the amount of room that we have for this port (the txCredits)
1320  *      otherwise we return a negative error number.
1321  *****************************************************************************/
1322 static int edge_write_room(struct tty_struct *tty)
1323 {
1324         struct usb_serial_port *port = tty->driver_data;
1325         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1326         int room;
1327         unsigned long flags;
1328
1329         if (edge_port == NULL)
1330                 return 0;
1331         if (edge_port->closePending)
1332                 return 0;
1333
1334         if (!edge_port->open) {
1335                 dev_dbg(&port->dev, "%s - port not opened\n", __func__);
1336                 return 0;
1337         }
1338
1339         /* total of both buffers is still txCredit */
1340         spin_lock_irqsave(&edge_port->ep_lock, flags);
1341         room = edge_port->txCredits - edge_port->txfifo.count;
1342         spin_unlock_irqrestore(&edge_port->ep_lock, flags);
1343
1344         dev_dbg(&port->dev, "%s - returns %d\n", __func__, room);
1345         return room;
1346 }
1347
1348
1349 /*****************************************************************************
1350  * edge_chars_in_buffer
1351  *      this function is called by the tty driver when it wants to know how
1352  *      many bytes of data we currently have outstanding in the port (data that
1353  *      has been written, but hasn't made it out the port yet)
1354  *      If successful, we return the number of bytes left to be written in the
1355  *      system,
1356  *      Otherwise we return a negative error number.
1357  *****************************************************************************/
1358 static int edge_chars_in_buffer(struct tty_struct *tty)
1359 {
1360         struct usb_serial_port *port = tty->driver_data;
1361         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1362         int num_chars;
1363         unsigned long flags;
1364
1365         if (edge_port == NULL)
1366                 return 0;
1367         if (edge_port->closePending)
1368                 return 0;
1369
1370         if (!edge_port->open) {
1371                 dev_dbg(&port->dev, "%s - port not opened\n", __func__);
1372                 return 0;
1373         }
1374
1375         spin_lock_irqsave(&edge_port->ep_lock, flags);
1376         num_chars = edge_port->maxTxCredits - edge_port->txCredits +
1377                                                 edge_port->txfifo.count;
1378         spin_unlock_irqrestore(&edge_port->ep_lock, flags);
1379         if (num_chars) {
1380                 dev_dbg(&port->dev, "%s - returns %d\n", __func__, num_chars);
1381         }
1382
1383         return num_chars;
1384 }
1385
1386
1387 /*****************************************************************************
1388  * SerialThrottle
1389  *      this function is called by the tty driver when it wants to stop the data
1390  *      being read from the port.
1391  *****************************************************************************/
1392 static void edge_throttle(struct tty_struct *tty)
1393 {
1394         struct usb_serial_port *port = tty->driver_data;
1395         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1396         int status;
1397
1398         if (edge_port == NULL)
1399                 return;
1400
1401         if (!edge_port->open) {
1402                 dev_dbg(&port->dev, "%s - port not opened\n", __func__);
1403                 return;
1404         }
1405
1406         /* if we are implementing XON/XOFF, send the stop character */
1407         if (I_IXOFF(tty)) {
1408                 unsigned char stop_char = STOP_CHAR(tty);
1409                 status = edge_write(tty, port, &stop_char, 1);
1410                 if (status <= 0)
1411                         return;
1412         }
1413
1414         /* if we are implementing RTS/CTS, toggle that line */
1415         if (tty->termios.c_cflag & CRTSCTS) {
1416                 edge_port->shadowMCR &= ~MCR_RTS;
1417                 status = send_cmd_write_uart_register(edge_port, MCR,
1418                                                         edge_port->shadowMCR);
1419                 if (status != 0)
1420                         return;
1421         }
1422 }
1423
1424
1425 /*****************************************************************************
1426  * edge_unthrottle
1427  *      this function is called by the tty driver when it wants to resume the
1428  *      data being read from the port (called after SerialThrottle is called)
1429  *****************************************************************************/
1430 static void edge_unthrottle(struct tty_struct *tty)
1431 {
1432         struct usb_serial_port *port = tty->driver_data;
1433         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1434         int status;
1435
1436         if (edge_port == NULL)
1437                 return;
1438
1439         if (!edge_port->open) {
1440                 dev_dbg(&port->dev, "%s - port not opened\n", __func__);
1441                 return;
1442         }
1443
1444         /* if we are implementing XON/XOFF, send the start character */
1445         if (I_IXOFF(tty)) {
1446                 unsigned char start_char = START_CHAR(tty);
1447                 status = edge_write(tty, port, &start_char, 1);
1448                 if (status <= 0)
1449                         return;
1450         }
1451         /* if we are implementing RTS/CTS, toggle that line */
1452         if (tty->termios.c_cflag & CRTSCTS) {
1453                 edge_port->shadowMCR |= MCR_RTS;
1454                 send_cmd_write_uart_register(edge_port, MCR,
1455                                                 edge_port->shadowMCR);
1456         }
1457 }
1458
1459
1460 /*****************************************************************************
1461  * SerialSetTermios
1462  *      this function is called by the tty driver when it wants to change
1463  * the termios structure
1464  *****************************************************************************/
1465 static void edge_set_termios(struct tty_struct *tty,
1466         struct usb_serial_port *port, struct ktermios *old_termios)
1467 {
1468         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1469         unsigned int cflag;
1470
1471         cflag = tty->termios.c_cflag;
1472         dev_dbg(&port->dev, "%s - clfag %08x iflag %08x\n", __func__, tty->termios.c_cflag, tty->termios.c_iflag);
1473         dev_dbg(&port->dev, "%s - old clfag %08x old iflag %08x\n", __func__, old_termios->c_cflag, old_termios->c_iflag);
1474
1475         if (edge_port == NULL)
1476                 return;
1477
1478         if (!edge_port->open) {
1479                 dev_dbg(&port->dev, "%s - port not opened\n", __func__);
1480                 return;
1481         }
1482
1483         /* change the port settings to the new ones specified */
1484         change_port_settings(tty, edge_port, old_termios);
1485 }
1486
1487
1488 /*****************************************************************************
1489  * get_lsr_info - get line status register info
1490  *
1491  * Purpose: Let user call ioctl() to get info when the UART physically
1492  *          is emptied.  On bus types like RS485, the transmitter must
1493  *          release the bus after transmitting. This must be done when
1494  *          the transmit shift register is empty, not be done when the
1495  *          transmit holding register is empty.  This functionality
1496  *          allows an RS485 driver to be written in user space.
1497  *****************************************************************************/
1498 static int get_lsr_info(struct edgeport_port *edge_port,
1499                                                 unsigned int __user *value)
1500 {
1501         unsigned int result = 0;
1502         unsigned long flags;
1503
1504         spin_lock_irqsave(&edge_port->ep_lock, flags);
1505         if (edge_port->maxTxCredits == edge_port->txCredits &&
1506             edge_port->txfifo.count == 0) {
1507                 dev_dbg(&edge_port->port->dev, "%s -- Empty\n", __func__);
1508                 result = TIOCSER_TEMT;
1509         }
1510         spin_unlock_irqrestore(&edge_port->ep_lock, flags);
1511
1512         if (copy_to_user(value, &result, sizeof(int)))
1513                 return -EFAULT;
1514         return 0;
1515 }
1516
1517 static int edge_tiocmset(struct tty_struct *tty,
1518                                         unsigned int set, unsigned int clear)
1519 {
1520         struct usb_serial_port *port = tty->driver_data;
1521         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1522         unsigned int mcr;
1523
1524         mcr = edge_port->shadowMCR;
1525         if (set & TIOCM_RTS)
1526                 mcr |= MCR_RTS;
1527         if (set & TIOCM_DTR)
1528                 mcr |= MCR_DTR;
1529         if (set & TIOCM_LOOP)
1530                 mcr |= MCR_LOOPBACK;
1531
1532         if (clear & TIOCM_RTS)
1533                 mcr &= ~MCR_RTS;
1534         if (clear & TIOCM_DTR)
1535                 mcr &= ~MCR_DTR;
1536         if (clear & TIOCM_LOOP)
1537                 mcr &= ~MCR_LOOPBACK;
1538
1539         edge_port->shadowMCR = mcr;
1540
1541         send_cmd_write_uart_register(edge_port, MCR, edge_port->shadowMCR);
1542
1543         return 0;
1544 }
1545
1546 static int edge_tiocmget(struct tty_struct *tty)
1547 {
1548         struct usb_serial_port *port = tty->driver_data;
1549         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1550         unsigned int result = 0;
1551         unsigned int msr;
1552         unsigned int mcr;
1553
1554         msr = edge_port->shadowMSR;
1555         mcr = edge_port->shadowMCR;
1556         result = ((mcr & MCR_DTR)       ? TIOCM_DTR: 0)   /* 0x002 */
1557                   | ((mcr & MCR_RTS)    ? TIOCM_RTS: 0)   /* 0x004 */
1558                   | ((msr & EDGEPORT_MSR_CTS)   ? TIOCM_CTS: 0)   /* 0x020 */
1559                   | ((msr & EDGEPORT_MSR_CD)    ? TIOCM_CAR: 0)   /* 0x040 */
1560                   | ((msr & EDGEPORT_MSR_RI)    ? TIOCM_RI:  0)   /* 0x080 */
1561                   | ((msr & EDGEPORT_MSR_DSR)   ? TIOCM_DSR: 0);  /* 0x100 */
1562
1563         return result;
1564 }
1565
1566 static int get_serial_info(struct edgeport_port *edge_port,
1567                                 struct serial_struct __user *retinfo)
1568 {
1569         struct serial_struct tmp;
1570
1571         if (!retinfo)
1572                 return -EFAULT;
1573
1574         memset(&tmp, 0, sizeof(tmp));
1575
1576         tmp.type                = PORT_16550A;
1577         tmp.line                = edge_port->port->minor;
1578         tmp.port                = edge_port->port->port_number;
1579         tmp.irq                 = 0;
1580         tmp.flags               = ASYNC_SKIP_TEST | ASYNC_AUTO_IRQ;
1581         tmp.xmit_fifo_size      = edge_port->maxTxCredits;
1582         tmp.baud_base           = 9600;
1583         tmp.close_delay         = 5*HZ;
1584         tmp.closing_wait        = 30*HZ;
1585
1586         if (copy_to_user(retinfo, &tmp, sizeof(*retinfo)))
1587                 return -EFAULT;
1588         return 0;
1589 }
1590
1591
1592 /*****************************************************************************
1593  * SerialIoctl
1594  *      this function handles any ioctl calls to the driver
1595  *****************************************************************************/
1596 static int edge_ioctl(struct tty_struct *tty,
1597                                         unsigned int cmd, unsigned long arg)
1598 {
1599         struct usb_serial_port *port = tty->driver_data;
1600         DEFINE_WAIT(wait);
1601         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1602
1603         switch (cmd) {
1604         case TIOCSERGETLSR:
1605                 dev_dbg(&port->dev, "%s TIOCSERGETLSR\n", __func__);
1606                 return get_lsr_info(edge_port, (unsigned int __user *) arg);
1607
1608         case TIOCGSERIAL:
1609                 dev_dbg(&port->dev, "%s TIOCGSERIAL\n", __func__);
1610                 return get_serial_info(edge_port, (struct serial_struct __user *) arg);
1611         }
1612         return -ENOIOCTLCMD;
1613 }
1614
1615
1616 /*****************************************************************************
1617  * SerialBreak
1618  *      this function sends a break to the port
1619  *****************************************************************************/
1620 static void edge_break(struct tty_struct *tty, int break_state)
1621 {
1622         struct usb_serial_port *port = tty->driver_data;
1623         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1624         struct edgeport_serial *edge_serial = usb_get_serial_data(port->serial);
1625         int status;
1626
1627         if ((!edge_serial->is_epic) ||
1628             ((edge_serial->is_epic) &&
1629              (edge_serial->epic_descriptor.Supports.IOSPChase))) {
1630                 /* flush and chase */
1631                 edge_port->chaseResponsePending = true;
1632
1633                 dev_dbg(&port->dev, "%s - Sending IOSP_CMD_CHASE_PORT\n", __func__);
1634                 status = send_iosp_ext_cmd(edge_port, IOSP_CMD_CHASE_PORT, 0);
1635                 if (status == 0) {
1636                         /* block until chase finished */
1637                         block_until_chase_response(edge_port);
1638                 } else {
1639                         edge_port->chaseResponsePending = false;
1640                 }
1641         }
1642
1643         if ((!edge_serial->is_epic) ||
1644             ((edge_serial->is_epic) &&
1645              (edge_serial->epic_descriptor.Supports.IOSPSetClrBreak))) {
1646                 if (break_state == -1) {
1647                         dev_dbg(&port->dev, "%s - Sending IOSP_CMD_SET_BREAK\n", __func__);
1648                         status = send_iosp_ext_cmd(edge_port,
1649                                                 IOSP_CMD_SET_BREAK, 0);
1650                 } else {
1651                         dev_dbg(&port->dev, "%s - Sending IOSP_CMD_CLEAR_BREAK\n", __func__);
1652                         status = send_iosp_ext_cmd(edge_port,
1653                                                 IOSP_CMD_CLEAR_BREAK, 0);
1654                 }
1655                 if (status)
1656                         dev_dbg(&port->dev, "%s - error sending break set/clear command.\n",
1657                                 __func__);
1658         }
1659 }
1660
1661
1662 /*****************************************************************************
1663  * process_rcvd_data
1664  *      this function handles the data received on the bulk in pipe.
1665  *****************************************************************************/
1666 static void process_rcvd_data(struct edgeport_serial *edge_serial,
1667                                 unsigned char *buffer, __u16 bufferLength)
1668 {
1669         struct usb_serial *serial = edge_serial->serial;
1670         struct device *dev = &serial->dev->dev;
1671         struct usb_serial_port *port;
1672         struct edgeport_port *edge_port;
1673         __u16 lastBufferLength;
1674         __u16 rxLen;
1675
1676         lastBufferLength = bufferLength + 1;
1677
1678         while (bufferLength > 0) {
1679                 /* failsafe incase we get a message that we don't understand */
1680                 if (lastBufferLength == bufferLength) {
1681                         dev_dbg(dev, "%s - stuck in loop, exiting it.\n", __func__);
1682                         break;
1683                 }
1684                 lastBufferLength = bufferLength;
1685
1686                 switch (edge_serial->rxState) {
1687                 case EXPECT_HDR1:
1688                         edge_serial->rxHeader1 = *buffer;
1689                         ++buffer;
1690                         --bufferLength;
1691
1692                         if (bufferLength == 0) {
1693                                 edge_serial->rxState = EXPECT_HDR2;
1694                                 break;
1695                         }
1696                         /* otherwise, drop on through */
1697                 case EXPECT_HDR2:
1698                         edge_serial->rxHeader2 = *buffer;
1699                         ++buffer;
1700                         --bufferLength;
1701
1702                         dev_dbg(dev, "%s - Hdr1=%02X Hdr2=%02X\n", __func__,
1703                                 edge_serial->rxHeader1, edge_serial->rxHeader2);
1704                         /* Process depending on whether this header is
1705                          * data or status */
1706
1707                         if (IS_CMD_STAT_HDR(edge_serial->rxHeader1)) {
1708                                 /* Decode this status header and go to
1709                                  * EXPECT_HDR1 (if we can process the status
1710                                  * with only 2 bytes), or go to EXPECT_HDR3 to
1711                                  * get the third byte. */
1712                                 edge_serial->rxPort =
1713                                     IOSP_GET_HDR_PORT(edge_serial->rxHeader1);
1714                                 edge_serial->rxStatusCode =
1715                                     IOSP_GET_STATUS_CODE(
1716                                                 edge_serial->rxHeader1);
1717
1718                                 if (!IOSP_STATUS_IS_2BYTE(
1719                                                 edge_serial->rxStatusCode)) {
1720                                         /* This status needs additional bytes.
1721                                          * Save what we have and then wait for
1722                                          * more data.
1723                                          */
1724                                         edge_serial->rxStatusParam
1725                                                 = edge_serial->rxHeader2;
1726                                         edge_serial->rxState = EXPECT_HDR3;
1727                                         break;
1728                                 }
1729                                 /* We have all the header bytes, process the
1730                                    status now */
1731                                 process_rcvd_status(edge_serial,
1732                                                 edge_serial->rxHeader2, 0);
1733                                 edge_serial->rxState = EXPECT_HDR1;
1734                                 break;
1735                         } else {
1736                                 edge_serial->rxPort =
1737                                     IOSP_GET_HDR_PORT(edge_serial->rxHeader1);
1738                                 edge_serial->rxBytesRemaining =
1739                                     IOSP_GET_HDR_DATA_LEN(
1740                                                 edge_serial->rxHeader1,
1741                                                 edge_serial->rxHeader2);
1742                                 dev_dbg(dev, "%s - Data for Port %u Len %u\n",
1743                                         __func__,
1744                                         edge_serial->rxPort,
1745                                         edge_serial->rxBytesRemaining);
1746
1747                                 /* ASSERT(DevExt->RxPort < DevExt->NumPorts);
1748                                  * ASSERT(DevExt->RxBytesRemaining <
1749                                  *              IOSP_MAX_DATA_LENGTH);
1750                                  */
1751
1752                                 if (bufferLength == 0) {
1753                                         edge_serial->rxState = EXPECT_DATA;
1754                                         break;
1755                                 }
1756                                 /* Else, drop through */
1757                         }
1758                 case EXPECT_DATA: /* Expect data */
1759                         if (bufferLength < edge_serial->rxBytesRemaining) {
1760                                 rxLen = bufferLength;
1761                                 /* Expect data to start next buffer */
1762                                 edge_serial->rxState = EXPECT_DATA;
1763                         } else {
1764                                 /* BufLen >= RxBytesRemaining */
1765                                 rxLen = edge_serial->rxBytesRemaining;
1766                                 /* Start another header next time */
1767                                 edge_serial->rxState = EXPECT_HDR1;
1768                         }
1769
1770                         bufferLength -= rxLen;
1771                         edge_serial->rxBytesRemaining -= rxLen;
1772
1773                         /* spit this data back into the tty driver if this
1774                            port is open */
1775                         if (rxLen && edge_serial->rxPort < serial->num_ports) {
1776                                 port = serial->port[edge_serial->rxPort];
1777                                 edge_port = usb_get_serial_port_data(port);
1778                                 if (edge_port && edge_port->open) {
1779                                         dev_dbg(dev, "%s - Sending %d bytes to TTY for port %d\n",
1780                                                 __func__, rxLen,
1781                                                 edge_serial->rxPort);
1782                                         edge_tty_recv(edge_port->port, buffer,
1783                                                         rxLen);
1784                                         edge_port->port->icount.rx += rxLen;
1785                                 }
1786                         }
1787                         buffer += rxLen;
1788                         break;
1789
1790                 case EXPECT_HDR3:       /* Expect 3rd byte of status header */
1791                         edge_serial->rxHeader3 = *buffer;
1792                         ++buffer;
1793                         --bufferLength;
1794
1795                         /* We have all the header bytes, process the
1796                            status now */
1797                         process_rcvd_status(edge_serial,
1798                                 edge_serial->rxStatusParam,
1799                                 edge_serial->rxHeader3);
1800                         edge_serial->rxState = EXPECT_HDR1;
1801                         break;
1802                 }
1803         }
1804 }
1805
1806
1807 /*****************************************************************************
1808  * process_rcvd_status
1809  *      this function handles the any status messages received on the
1810  *      bulk in pipe.
1811  *****************************************************************************/
1812 static void process_rcvd_status(struct edgeport_serial *edge_serial,
1813                                                 __u8 byte2, __u8 byte3)
1814 {
1815         struct usb_serial_port *port;
1816         struct edgeport_port *edge_port;
1817         struct tty_struct *tty;
1818         struct device *dev;
1819         __u8 code = edge_serial->rxStatusCode;
1820
1821         /* switch the port pointer to the one being currently talked about */
1822         if (edge_serial->rxPort >= edge_serial->serial->num_ports)
1823                 return;
1824         port = edge_serial->serial->port[edge_serial->rxPort];
1825         edge_port = usb_get_serial_port_data(port);
1826         if (edge_port == NULL) {
1827                 dev_err(&edge_serial->serial->dev->dev,
1828                         "%s - edge_port == NULL for port %d\n",
1829                                         __func__, edge_serial->rxPort);
1830                 return;
1831         }
1832         dev = &port->dev;
1833
1834         if (code == IOSP_EXT_STATUS) {
1835                 switch (byte2) {
1836                 case IOSP_EXT_STATUS_CHASE_RSP:
1837                         /* we want to do EXT status regardless of port
1838                          * open/closed */
1839                         dev_dbg(dev, "%s - Port %u EXT CHASE_RSP Data = %02x\n",
1840                                 __func__, edge_serial->rxPort, byte3);
1841                         /* Currently, the only EXT_STATUS is Chase, so process
1842                          * here instead of one more call to one more subroutine
1843                          * If/when more EXT_STATUS, there'll be more work to do
1844                          * Also, we currently clear flag and close the port
1845                          * regardless of content of above's Byte3.
1846                          * We could choose to do something else when Byte3 says
1847                          * Timeout on Chase from Edgeport, like wait longer in
1848                          * block_until_chase_response, but for now we don't.
1849                          */
1850                         edge_port->chaseResponsePending = false;
1851                         wake_up(&edge_port->wait_chase);
1852                         return;
1853
1854                 case IOSP_EXT_STATUS_RX_CHECK_RSP:
1855                         dev_dbg(dev, "%s ========== Port %u CHECK_RSP Sequence = %02x =============\n",
1856                                 __func__, edge_serial->rxPort, byte3);
1857                         /* Port->RxCheckRsp = true; */
1858                         return;
1859                 }
1860         }
1861
1862         if (code == IOSP_STATUS_OPEN_RSP) {
1863                 edge_port->txCredits = GET_TX_BUFFER_SIZE(byte3);
1864                 edge_port->maxTxCredits = edge_port->txCredits;
1865                 dev_dbg(dev, "%s - Port %u Open Response Initial MSR = %02x TxBufferSize = %d\n",
1866                         __func__, edge_serial->rxPort, byte2, edge_port->txCredits);
1867                 handle_new_msr(edge_port, byte2);
1868
1869                 /* send the current line settings to the port so we are
1870                    in sync with any further termios calls */
1871                 tty = tty_port_tty_get(&edge_port->port->port);
1872                 if (tty) {
1873                         change_port_settings(tty,
1874                                 edge_port, &tty->termios);
1875                         tty_kref_put(tty);
1876                 }
1877
1878                 /* we have completed the open */
1879                 edge_port->openPending = false;
1880                 edge_port->open = true;
1881                 wake_up(&edge_port->wait_open);
1882                 return;
1883         }
1884
1885         /* If port is closed, silently discard all rcvd status. We can
1886          * have cases where buffered status is received AFTER the close
1887          * port command is sent to the Edgeport.
1888          */
1889         if (!edge_port->open || edge_port->closePending)
1890                 return;
1891
1892         switch (code) {
1893         /* Not currently sent by Edgeport */
1894         case IOSP_STATUS_LSR:
1895                 dev_dbg(dev, "%s - Port %u LSR Status = %02x\n",
1896                         __func__, edge_serial->rxPort, byte2);
1897                 handle_new_lsr(edge_port, false, byte2, 0);
1898                 break;
1899
1900         case IOSP_STATUS_LSR_DATA:
1901                 dev_dbg(dev, "%s - Port %u LSR Status = %02x, Data = %02x\n",
1902                         __func__, edge_serial->rxPort, byte2, byte3);
1903                 /* byte2 is LSR Register */
1904                 /* byte3 is broken data byte */
1905                 handle_new_lsr(edge_port, true, byte2, byte3);
1906                 break;
1907         /*
1908          *      case IOSP_EXT_4_STATUS:
1909          *              dev_dbg(dev, "%s - Port %u LSR Status = %02x Data = %02x\n",
1910          *                      __func__, edge_serial->rxPort, byte2, byte3);
1911          *              break;
1912          */
1913         case IOSP_STATUS_MSR:
1914                 dev_dbg(dev, "%s - Port %u MSR Status = %02x\n",
1915                         __func__, edge_serial->rxPort, byte2);
1916                 /*
1917                  * Process this new modem status and generate appropriate
1918                  * events, etc, based on the new status. This routine
1919                  * also saves the MSR in Port->ShadowMsr.
1920                  */
1921                 handle_new_msr(edge_port, byte2);
1922                 break;
1923
1924         default:
1925                 dev_dbg(dev, "%s - Unrecognized IOSP status code %u\n", __func__, code);
1926                 break;
1927         }
1928 }
1929
1930
1931 /*****************************************************************************
1932  * edge_tty_recv
1933  *      this function passes data on to the tty flip buffer
1934  *****************************************************************************/
1935 static void edge_tty_recv(struct usb_serial_port *port, unsigned char *data,
1936                 int length)
1937 {
1938         int cnt;
1939
1940         cnt = tty_insert_flip_string(&port->port, data, length);
1941         if (cnt < length) {
1942                 dev_err(&port->dev, "%s - dropping data, %d bytes lost\n",
1943                                 __func__, length - cnt);
1944         }
1945         data += cnt;
1946         length -= cnt;
1947
1948         tty_flip_buffer_push(&port->port);
1949 }
1950
1951
1952 /*****************************************************************************
1953  * handle_new_msr
1954  *      this function handles any change to the msr register for a port.
1955  *****************************************************************************/
1956 static void handle_new_msr(struct edgeport_port *edge_port, __u8 newMsr)
1957 {
1958         struct  async_icount *icount;
1959
1960         if (newMsr & (EDGEPORT_MSR_DELTA_CTS | EDGEPORT_MSR_DELTA_DSR |
1961                         EDGEPORT_MSR_DELTA_RI | EDGEPORT_MSR_DELTA_CD)) {
1962                 icount = &edge_port->port->icount;
1963
1964                 /* update input line counters */
1965                 if (newMsr & EDGEPORT_MSR_DELTA_CTS)
1966                         icount->cts++;
1967                 if (newMsr & EDGEPORT_MSR_DELTA_DSR)
1968                         icount->dsr++;
1969                 if (newMsr & EDGEPORT_MSR_DELTA_CD)
1970                         icount->dcd++;
1971                 if (newMsr & EDGEPORT_MSR_DELTA_RI)
1972                         icount->rng++;
1973                 wake_up_interruptible(&edge_port->port->port.delta_msr_wait);
1974         }
1975
1976         /* Save the new modem status */
1977         edge_port->shadowMSR = newMsr & 0xf0;
1978 }
1979
1980
1981 /*****************************************************************************
1982  * handle_new_lsr
1983  *      this function handles any change to the lsr register for a port.
1984  *****************************************************************************/
1985 static void handle_new_lsr(struct edgeport_port *edge_port, __u8 lsrData,
1986                                                         __u8 lsr, __u8 data)
1987 {
1988         __u8 newLsr = (__u8) (lsr & (__u8)
1989                 (LSR_OVER_ERR | LSR_PAR_ERR | LSR_FRM_ERR | LSR_BREAK));
1990         struct async_icount *icount;
1991
1992         edge_port->shadowLSR = lsr;
1993
1994         if (newLsr & LSR_BREAK) {
1995                 /*
1996                  * Parity and Framing errors only count if they
1997                  * occur exclusive of a break being
1998                  * received.
1999                  */
2000                 newLsr &= (__u8)(LSR_OVER_ERR | LSR_BREAK);
2001         }
2002
2003         /* Place LSR data byte into Rx buffer */
2004         if (lsrData)
2005                 edge_tty_recv(edge_port->port, &data, 1);
2006
2007         /* update input line counters */
2008         icount = &edge_port->port->icount;
2009         if (newLsr & LSR_BREAK)
2010                 icount->brk++;
2011         if (newLsr & LSR_OVER_ERR)
2012                 icount->overrun++;
2013         if (newLsr & LSR_PAR_ERR)
2014                 icount->parity++;
2015         if (newLsr & LSR_FRM_ERR)
2016                 icount->frame++;
2017 }
2018
2019
2020 /****************************************************************************
2021  * sram_write
2022  *      writes a number of bytes to the Edgeport device's sram starting at the
2023  *      given address.
2024  *      If successful returns the number of bytes written, otherwise it returns
2025  *      a negative error number of the problem.
2026  ****************************************************************************/
2027 static int sram_write(struct usb_serial *serial, __u16 extAddr, __u16 addr,
2028                                         __u16 length, const __u8 *data)
2029 {
2030         int result;
2031         __u16 current_length;
2032         unsigned char *transfer_buffer;
2033
2034         dev_dbg(&serial->dev->dev, "%s - %x, %x, %d\n", __func__, extAddr, addr, length);
2035
2036         transfer_buffer =  kmalloc(64, GFP_KERNEL);
2037         if (!transfer_buffer)
2038                 return -ENOMEM;
2039
2040         /* need to split these writes up into 64 byte chunks */
2041         result = 0;
2042         while (length > 0) {
2043                 if (length > 64)
2044                         current_length = 64;
2045                 else
2046                         current_length = length;
2047
2048 /*              dev_dbg(&serial->dev->dev, "%s - writing %x, %x, %d\n", __func__, extAddr, addr, current_length); */
2049                 memcpy(transfer_buffer, data, current_length);
2050                 result = usb_control_msg(serial->dev,
2051                                         usb_sndctrlpipe(serial->dev, 0),
2052                                         USB_REQUEST_ION_WRITE_RAM,
2053                                         0x40, addr, extAddr, transfer_buffer,
2054                                         current_length, 300);
2055                 if (result < 0)
2056                         break;
2057                 length -= current_length;
2058                 addr += current_length;
2059                 data += current_length;
2060         }
2061
2062         kfree(transfer_buffer);
2063         return result;
2064 }
2065
2066
2067 /****************************************************************************
2068  * rom_write
2069  *      writes a number of bytes to the Edgeport device's ROM starting at the
2070  *      given address.
2071  *      If successful returns the number of bytes written, otherwise it returns
2072  *      a negative error number of the problem.
2073  ****************************************************************************/
2074 static int rom_write(struct usb_serial *serial, __u16 extAddr, __u16 addr,
2075                                         __u16 length, const __u8 *data)
2076 {
2077         int result;
2078         __u16 current_length;
2079         unsigned char *transfer_buffer;
2080
2081         transfer_buffer =  kmalloc(64, GFP_KERNEL);
2082         if (!transfer_buffer)
2083                 return -ENOMEM;
2084
2085         /* need to split these writes up into 64 byte chunks */
2086         result = 0;
2087         while (length > 0) {
2088                 if (length > 64)
2089                         current_length = 64;
2090                 else
2091                         current_length = length;
2092                 memcpy(transfer_buffer, data, current_length);
2093                 result = usb_control_msg(serial->dev,
2094                                         usb_sndctrlpipe(serial->dev, 0),
2095                                         USB_REQUEST_ION_WRITE_ROM, 0x40,
2096                                         addr, extAddr,
2097                                         transfer_buffer, current_length, 300);
2098                 if (result < 0)
2099                         break;
2100                 length -= current_length;
2101                 addr += current_length;
2102                 data += current_length;
2103         }
2104
2105         kfree(transfer_buffer);
2106         return result;
2107 }
2108
2109
2110 /****************************************************************************
2111  * rom_read
2112  *      reads a number of bytes from the Edgeport device starting at the given
2113  *      address.
2114  *      Returns zero on success or a negative error number.
2115  ****************************************************************************/
2116 static int rom_read(struct usb_serial *serial, __u16 extAddr,
2117                                         __u16 addr, __u16 length, __u8 *data)
2118 {
2119         int result;
2120         __u16 current_length;
2121         unsigned char *transfer_buffer;
2122
2123         transfer_buffer =  kmalloc(64, GFP_KERNEL);
2124         if (!transfer_buffer)
2125                 return -ENOMEM;
2126
2127         /* need to split these reads up into 64 byte chunks */
2128         result = 0;
2129         while (length > 0) {
2130                 if (length > 64)
2131                         current_length = 64;
2132                 else
2133                         current_length = length;
2134                 result = usb_control_msg(serial->dev,
2135                                         usb_rcvctrlpipe(serial->dev, 0),
2136                                         USB_REQUEST_ION_READ_ROM,
2137                                         0xC0, addr, extAddr, transfer_buffer,
2138                                         current_length, 300);
2139                 if (result < current_length) {
2140                         if (result >= 0)
2141                                 result = -EIO;
2142                         break;
2143                 }
2144                 memcpy(data, transfer_buffer, current_length);
2145                 length -= current_length;
2146                 addr += current_length;
2147                 data += current_length;
2148
2149                 result = 0;
2150         }
2151
2152         kfree(transfer_buffer);
2153         return result;
2154 }
2155
2156
2157 /****************************************************************************
2158  * send_iosp_ext_cmd
2159  *      Is used to send a IOSP message to the Edgeport device
2160  ****************************************************************************/
2161 static int send_iosp_ext_cmd(struct edgeport_port *edge_port,
2162                                                 __u8 command, __u8 param)
2163 {
2164         unsigned char   *buffer;
2165         unsigned char   *currentCommand;
2166         int             length = 0;
2167         int             status = 0;
2168
2169         buffer = kmalloc(10, GFP_ATOMIC);
2170         if (!buffer)
2171                 return -ENOMEM;
2172
2173         currentCommand = buffer;
2174
2175         MAKE_CMD_EXT_CMD(&currentCommand, &length, edge_port->port->port_number,
2176                          command, param);
2177
2178         status = write_cmd_usb(edge_port, buffer, length);
2179         if (status) {
2180                 /* something bad happened, let's free up the memory */
2181                 kfree(buffer);
2182         }
2183
2184         return status;
2185 }
2186
2187
2188 /*****************************************************************************
2189  * write_cmd_usb
2190  *      this function writes the given buffer out to the bulk write endpoint.
2191  *****************************************************************************/
2192 static int write_cmd_usb(struct edgeport_port *edge_port,
2193                                         unsigned char *buffer, int length)
2194 {
2195         struct edgeport_serial *edge_serial =
2196                                 usb_get_serial_data(edge_port->port->serial);
2197         struct device *dev = &edge_port->port->dev;
2198         int status = 0;
2199         struct urb *urb;
2200
2201         usb_serial_debug_data(dev, __func__, length, buffer);
2202
2203         /* Allocate our next urb */
2204         urb = usb_alloc_urb(0, GFP_ATOMIC);
2205         if (!urb)
2206                 return -ENOMEM;
2207
2208         atomic_inc(&CmdUrbs);
2209         dev_dbg(dev, "%s - ALLOCATE URB %p (outstanding %d)\n",
2210                 __func__, urb, atomic_read(&CmdUrbs));
2211
2212         usb_fill_bulk_urb(urb, edge_serial->serial->dev,
2213                         usb_sndbulkpipe(edge_serial->serial->dev,
2214                                         edge_serial->bulk_out_endpoint),
2215                         buffer, length, edge_bulk_out_cmd_callback, edge_port);
2216
2217         edge_port->commandPending = true;
2218         status = usb_submit_urb(urb, GFP_ATOMIC);
2219
2220         if (status) {
2221                 /* something went wrong */
2222                 dev_err(dev, "%s - usb_submit_urb(write command) failed, status = %d\n",
2223                         __func__, status);
2224                 usb_free_urb(urb);
2225                 atomic_dec(&CmdUrbs);
2226                 return status;
2227         }
2228
2229 #if 0
2230         wait_event(&edge_port->wait_command, !edge_port->commandPending);
2231
2232         if (edge_port->commandPending) {
2233                 /* command timed out */
2234                 dev_dbg(dev, "%s - command timed out\n", __func__);
2235                 status = -EINVAL;
2236         }
2237 #endif
2238         return status;
2239 }
2240
2241
2242 /*****************************************************************************
2243  * send_cmd_write_baud_rate
2244  *      this function sends the proper command to change the baud rate of the
2245  *      specified port.
2246  *****************************************************************************/
2247 static int send_cmd_write_baud_rate(struct edgeport_port *edge_port,
2248                                                                 int baudRate)
2249 {
2250         struct edgeport_serial *edge_serial =
2251                                 usb_get_serial_data(edge_port->port->serial);
2252         struct device *dev = &edge_port->port->dev;
2253         unsigned char *cmdBuffer;
2254         unsigned char *currCmd;
2255         int cmdLen = 0;
2256         int divisor;
2257         int status;
2258         u32 number = edge_port->port->port_number;
2259
2260         if (edge_serial->is_epic &&
2261             !edge_serial->epic_descriptor.Supports.IOSPSetBaudRate) {
2262                 dev_dbg(dev, "SendCmdWriteBaudRate - NOT Setting baud rate for port, baud = %d\n",
2263                         baudRate);
2264                 return 0;
2265         }
2266
2267         dev_dbg(dev, "%s - baud = %d\n", __func__, baudRate);
2268
2269         status = calc_baud_rate_divisor(dev, baudRate, &divisor);
2270         if (status) {
2271                 dev_err(dev, "%s - bad baud rate\n", __func__);
2272                 return status;
2273         }
2274
2275         /* Alloc memory for the string of commands. */
2276         cmdBuffer =  kmalloc(0x100, GFP_ATOMIC);
2277         if (!cmdBuffer)
2278                 return -ENOMEM;
2279
2280         currCmd = cmdBuffer;
2281
2282         /* Enable access to divisor latch */
2283         MAKE_CMD_WRITE_REG(&currCmd, &cmdLen, number, LCR, LCR_DL_ENABLE);
2284
2285         /* Write the divisor itself */
2286         MAKE_CMD_WRITE_REG(&currCmd, &cmdLen, number, DLL, LOW8(divisor));
2287         MAKE_CMD_WRITE_REG(&currCmd, &cmdLen, number, DLM, HIGH8(divisor));
2288
2289         /* Restore original value to disable access to divisor latch */
2290         MAKE_CMD_WRITE_REG(&currCmd, &cmdLen, number, LCR,
2291                                                 edge_port->shadowLCR);
2292
2293         status = write_cmd_usb(edge_port, cmdBuffer, cmdLen);
2294         if (status) {
2295                 /* something bad happened, let's free up the memory */
2296                 kfree(cmdBuffer);
2297         }
2298
2299         return status;
2300 }
2301
2302
2303 /*****************************************************************************
2304  * calc_baud_rate_divisor
2305  *      this function calculates the proper baud rate divisor for the specified
2306  *      baud rate.
2307  *****************************************************************************/
2308 static int calc_baud_rate_divisor(struct device *dev, int baudrate, int *divisor)
2309 {
2310         int i;
2311         __u16 custom;
2312
2313         for (i = 0; i < ARRAY_SIZE(divisor_table); i++) {
2314                 if (divisor_table[i].BaudRate == baudrate) {
2315                         *divisor = divisor_table[i].Divisor;
2316                         return 0;
2317                 }
2318         }
2319
2320         /* We have tried all of the standard baud rates
2321          * lets try to calculate the divisor for this baud rate
2322          * Make sure the baud rate is reasonable */
2323         if (baudrate > 50 && baudrate < 230400) {
2324                 /* get divisor */
2325                 custom = (__u16)((230400L + baudrate/2) / baudrate);
2326
2327                 *divisor = custom;
2328
2329                 dev_dbg(dev, "%s - Baud %d = %d\n", __func__, baudrate, custom);
2330                 return 0;
2331         }
2332
2333         return -1;
2334 }
2335
2336
2337 /*****************************************************************************
2338  * send_cmd_write_uart_register
2339  *  this function builds up a uart register message and sends to the device.
2340  *****************************************************************************/
2341 static int send_cmd_write_uart_register(struct edgeport_port *edge_port,
2342                                                 __u8 regNum, __u8 regValue)
2343 {
2344         struct edgeport_serial *edge_serial =
2345                                 usb_get_serial_data(edge_port->port->serial);
2346         struct device *dev = &edge_port->port->dev;
2347         unsigned char *cmdBuffer;
2348         unsigned char *currCmd;
2349         unsigned long cmdLen = 0;
2350         int status;
2351
2352         dev_dbg(dev, "%s - write to %s register 0x%02x\n",
2353                 (regNum == MCR) ? "MCR" : "LCR", __func__, regValue);
2354
2355         if (edge_serial->is_epic &&
2356             !edge_serial->epic_descriptor.Supports.IOSPWriteMCR &&
2357             regNum == MCR) {
2358                 dev_dbg(dev, "SendCmdWriteUartReg - Not writing to MCR Register\n");
2359                 return 0;
2360         }
2361
2362         if (edge_serial->is_epic &&
2363             !edge_serial->epic_descriptor.Supports.IOSPWriteLCR &&
2364             regNum == LCR) {
2365                 dev_dbg(dev, "SendCmdWriteUartReg - Not writing to LCR Register\n");
2366                 return 0;
2367         }
2368
2369         /* Alloc memory for the string of commands. */
2370         cmdBuffer = kmalloc(0x10, GFP_ATOMIC);
2371         if (cmdBuffer == NULL)
2372                 return -ENOMEM;
2373
2374         currCmd = cmdBuffer;
2375
2376         /* Build a cmd in the buffer to write the given register */
2377         MAKE_CMD_WRITE_REG(&currCmd, &cmdLen, edge_port->port->port_number,
2378                            regNum, regValue);
2379
2380         status = write_cmd_usb(edge_port, cmdBuffer, cmdLen);
2381         if (status) {
2382                 /* something bad happened, let's free up the memory */
2383                 kfree(cmdBuffer);
2384         }
2385
2386         return status;
2387 }
2388
2389
2390 /*****************************************************************************
2391  * change_port_settings
2392  *      This routine is called to set the UART on the device to match the
2393  *      specified new settings.
2394  *****************************************************************************/
2395
2396 static void change_port_settings(struct tty_struct *tty,
2397         struct edgeport_port *edge_port, struct ktermios *old_termios)
2398 {
2399         struct device *dev = &edge_port->port->dev;
2400         struct edgeport_serial *edge_serial =
2401                         usb_get_serial_data(edge_port->port->serial);
2402         int baud;
2403         unsigned cflag;
2404         __u8 mask = 0xff;
2405         __u8 lData;
2406         __u8 lParity;
2407         __u8 lStop;
2408         __u8 rxFlow;
2409         __u8 txFlow;
2410         int status;
2411
2412         if (!edge_port->open &&
2413             !edge_port->openPending) {
2414                 dev_dbg(dev, "%s - port not opened\n", __func__);
2415                 return;
2416         }
2417
2418         cflag = tty->termios.c_cflag;
2419
2420         switch (cflag & CSIZE) {
2421         case CS5:
2422                 lData = LCR_BITS_5; mask = 0x1f;
2423                 dev_dbg(dev, "%s - data bits = 5\n", __func__);
2424                 break;
2425         case CS6:
2426                 lData = LCR_BITS_6; mask = 0x3f;
2427                 dev_dbg(dev, "%s - data bits = 6\n", __func__);
2428                 break;
2429         case CS7:
2430                 lData = LCR_BITS_7; mask = 0x7f;
2431                 dev_dbg(dev, "%s - data bits = 7\n", __func__);
2432                 break;
2433         default:
2434         case CS8:
2435                 lData = LCR_BITS_8;
2436                 dev_dbg(dev, "%s - data bits = 8\n", __func__);
2437                 break;
2438         }
2439
2440         lParity = LCR_PAR_NONE;
2441         if (cflag & PARENB) {
2442                 if (cflag & CMSPAR) {
2443                         if (cflag & PARODD) {
2444                                 lParity = LCR_PAR_MARK;
2445                                 dev_dbg(dev, "%s - parity = mark\n", __func__);
2446                         } else {
2447                                 lParity = LCR_PAR_SPACE;
2448                                 dev_dbg(dev, "%s - parity = space\n", __func__);
2449                         }
2450                 } else if (cflag & PARODD) {
2451                         lParity = LCR_PAR_ODD;
2452                         dev_dbg(dev, "%s - parity = odd\n", __func__);
2453                 } else {
2454                         lParity = LCR_PAR_EVEN;
2455                         dev_dbg(dev, "%s - parity = even\n", __func__);
2456                 }
2457         } else {
2458                 dev_dbg(dev, "%s - parity = none\n", __func__);
2459         }
2460
2461         if (cflag & CSTOPB) {
2462                 lStop = LCR_STOP_2;
2463                 dev_dbg(dev, "%s - stop bits = 2\n", __func__);
2464         } else {
2465                 lStop = LCR_STOP_1;
2466                 dev_dbg(dev, "%s - stop bits = 1\n", __func__);
2467         }
2468
2469         /* figure out the flow control settings */
2470         rxFlow = txFlow = 0x00;
2471         if (cflag & CRTSCTS) {
2472                 rxFlow |= IOSP_RX_FLOW_RTS;
2473                 txFlow |= IOSP_TX_FLOW_CTS;
2474                 dev_dbg(dev, "%s - RTS/CTS is enabled\n", __func__);
2475         } else {
2476                 dev_dbg(dev, "%s - RTS/CTS is disabled\n", __func__);
2477         }
2478
2479         /* if we are implementing XON/XOFF, set the start and stop character
2480            in the device */
2481         if (I_IXOFF(tty) || I_IXON(tty)) {
2482                 unsigned char stop_char  = STOP_CHAR(tty);
2483                 unsigned char start_char = START_CHAR(tty);
2484
2485                 if ((!edge_serial->is_epic) ||
2486                     ((edge_serial->is_epic) &&
2487                      (edge_serial->epic_descriptor.Supports.IOSPSetXChar))) {
2488                         send_iosp_ext_cmd(edge_port,
2489                                         IOSP_CMD_SET_XON_CHAR, start_char);
2490                         send_iosp_ext_cmd(edge_port,
2491                                         IOSP_CMD_SET_XOFF_CHAR, stop_char);
2492                 }
2493
2494                 /* if we are implementing INBOUND XON/XOFF */
2495                 if (I_IXOFF(tty)) {
2496                         rxFlow |= IOSP_RX_FLOW_XON_XOFF;
2497                         dev_dbg(dev, "%s - INBOUND XON/XOFF is enabled, XON = %2x, XOFF = %2x\n",
2498                                 __func__, start_char, stop_char);
2499                 } else {
2500                         dev_dbg(dev, "%s - INBOUND XON/XOFF is disabled\n", __func__);
2501                 }
2502
2503                 /* if we are implementing OUTBOUND XON/XOFF */
2504                 if (I_IXON(tty)) {
2505                         txFlow |= IOSP_TX_FLOW_XON_XOFF;
2506                         dev_dbg(dev, "%s - OUTBOUND XON/XOFF is enabled, XON = %2x, XOFF = %2x\n",
2507                                 __func__, start_char, stop_char);
2508                 } else {
2509                         dev_dbg(dev, "%s - OUTBOUND XON/XOFF is disabled\n", __func__);
2510                 }
2511         }
2512
2513         /* Set flow control to the configured value */
2514         if ((!edge_serial->is_epic) ||
2515             ((edge_serial->is_epic) &&
2516              (edge_serial->epic_descriptor.Supports.IOSPSetRxFlow)))
2517                 send_iosp_ext_cmd(edge_port, IOSP_CMD_SET_RX_FLOW, rxFlow);
2518         if ((!edge_serial->is_epic) ||
2519             ((edge_serial->is_epic) &&
2520              (edge_serial->epic_descriptor.Supports.IOSPSetTxFlow)))
2521                 send_iosp_ext_cmd(edge_port, IOSP_CMD_SET_TX_FLOW, txFlow);
2522
2523
2524         edge_port->shadowLCR &= ~(LCR_BITS_MASK | LCR_STOP_MASK | LCR_PAR_MASK);
2525         edge_port->shadowLCR |= (lData | lParity | lStop);
2526
2527         edge_port->validDataMask = mask;
2528
2529         /* Send the updated LCR value to the EdgePort */
2530         status = send_cmd_write_uart_register(edge_port, LCR,
2531                                                         edge_port->shadowLCR);
2532         if (status != 0)
2533                 return;
2534
2535         /* set up the MCR register and send it to the EdgePort */
2536         edge_port->shadowMCR = MCR_MASTER_IE;
2537         if (cflag & CBAUD)
2538                 edge_port->shadowMCR |= (MCR_DTR | MCR_RTS);
2539
2540         status = send_cmd_write_uart_register(edge_port, MCR,
2541                                                 edge_port->shadowMCR);
2542         if (status != 0)
2543                 return;
2544
2545         /* Determine divisor based on baud rate */
2546         baud = tty_get_baud_rate(tty);
2547         if (!baud) {
2548                 /* pick a default, any default... */
2549                 baud = 9600;
2550         }
2551
2552         dev_dbg(dev, "%s - baud rate = %d\n", __func__, baud);
2553         status = send_cmd_write_baud_rate(edge_port, baud);
2554         if (status == -1) {
2555                 /* Speed change was not possible - put back the old speed */
2556                 baud = tty_termios_baud_rate(old_termios);
2557                 tty_encode_baud_rate(tty, baud, baud);
2558         }
2559 }
2560
2561
2562 /****************************************************************************
2563  * unicode_to_ascii
2564  *      Turns a string from Unicode into ASCII.
2565  *      Doesn't do a good job with any characters that are outside the normal
2566  *      ASCII range, but it's only for debugging...
2567  *      NOTE: expects the unicode in LE format
2568  ****************************************************************************/
2569 static void unicode_to_ascii(char *string, int buflen,
2570                                         __le16 *unicode, int unicode_size)
2571 {
2572         int i;
2573
2574         if (buflen <= 0)        /* never happens, but... */
2575                 return;
2576         --buflen;               /* space for nul */
2577
2578         for (i = 0; i < unicode_size; i++) {
2579                 if (i >= buflen)
2580                         break;
2581                 string[i] = (char)(le16_to_cpu(unicode[i]));
2582         }
2583         string[i] = 0x00;
2584 }
2585
2586
2587 /****************************************************************************
2588  * get_manufacturing_desc
2589  *      reads in the manufacturing descriptor and stores it into the serial
2590  *      structure.
2591  ****************************************************************************/
2592 static void get_manufacturing_desc(struct edgeport_serial *edge_serial)
2593 {
2594         struct device *dev = &edge_serial->serial->dev->dev;
2595         int response;
2596
2597         dev_dbg(dev, "getting manufacturer descriptor\n");
2598
2599         response = rom_read(edge_serial->serial,
2600                                 (EDGE_MANUF_DESC_ADDR & 0xffff0000) >> 16,
2601                                 (__u16)(EDGE_MANUF_DESC_ADDR & 0x0000ffff),
2602                                 EDGE_MANUF_DESC_LEN,
2603                                 (__u8 *)(&edge_serial->manuf_descriptor));
2604
2605         if (response < 0) {
2606                 dev_err(dev, "error in getting manufacturer descriptor: %d\n",
2607                                 response);
2608         } else {
2609                 char string[30];
2610                 dev_dbg(dev, "**Manufacturer Descriptor\n");
2611                 dev_dbg(dev, "  RomSize:        %dK\n",
2612                         edge_serial->manuf_descriptor.RomSize);
2613                 dev_dbg(dev, "  RamSize:        %dK\n",
2614                         edge_serial->manuf_descriptor.RamSize);
2615                 dev_dbg(dev, "  CpuRev:         %d\n",
2616                         edge_serial->manuf_descriptor.CpuRev);
2617                 dev_dbg(dev, "  BoardRev:       %d\n",
2618                         edge_serial->manuf_descriptor.BoardRev);
2619                 dev_dbg(dev, "  NumPorts:       %d\n",
2620                         edge_serial->manuf_descriptor.NumPorts);
2621                 dev_dbg(dev, "  DescDate:       %d/%d/%d\n",
2622                         edge_serial->manuf_descriptor.DescDate[0],
2623                         edge_serial->manuf_descriptor.DescDate[1],
2624                         edge_serial->manuf_descriptor.DescDate[2]+1900);
2625                 unicode_to_ascii(string, sizeof(string),
2626                         edge_serial->manuf_descriptor.SerialNumber,
2627                         edge_serial->manuf_descriptor.SerNumLength/2);
2628                 dev_dbg(dev, "  SerialNumber: %s\n", string);
2629                 unicode_to_ascii(string, sizeof(string),
2630                         edge_serial->manuf_descriptor.AssemblyNumber,
2631                         edge_serial->manuf_descriptor.AssemblyNumLength/2);
2632                 dev_dbg(dev, "  AssemblyNumber: %s\n", string);
2633                 unicode_to_ascii(string, sizeof(string),
2634                     edge_serial->manuf_descriptor.OemAssyNumber,
2635                     edge_serial->manuf_descriptor.OemAssyNumLength/2);
2636                 dev_dbg(dev, "  OemAssyNumber:  %s\n", string);
2637                 dev_dbg(dev, "  UartType:       %d\n",
2638                         edge_serial->manuf_descriptor.UartType);
2639                 dev_dbg(dev, "  IonPid:         %d\n",
2640                         edge_serial->manuf_descriptor.IonPid);
2641                 dev_dbg(dev, "  IonConfig:      %d\n",
2642                         edge_serial->manuf_descriptor.IonConfig);
2643         }
2644 }
2645
2646
2647 /****************************************************************************
2648  * get_boot_desc
2649  *      reads in the bootloader descriptor and stores it into the serial
2650  *      structure.
2651  ****************************************************************************/
2652 static void get_boot_desc(struct edgeport_serial *edge_serial)
2653 {
2654         struct device *dev = &edge_serial->serial->dev->dev;
2655         int response;
2656
2657         dev_dbg(dev, "getting boot descriptor\n");
2658
2659         response = rom_read(edge_serial->serial,
2660                                 (EDGE_BOOT_DESC_ADDR & 0xffff0000) >> 16,
2661                                 (__u16)(EDGE_BOOT_DESC_ADDR & 0x0000ffff),
2662                                 EDGE_BOOT_DESC_LEN,
2663                                 (__u8 *)(&edge_serial->boot_descriptor));
2664
2665         if (response < 0) {
2666                 dev_err(dev, "error in getting boot descriptor: %d\n",
2667                                 response);
2668         } else {
2669                 dev_dbg(dev, "**Boot Descriptor:\n");
2670                 dev_dbg(dev, "  BootCodeLength: %d\n",
2671                         le16_to_cpu(edge_serial->boot_descriptor.BootCodeLength));
2672                 dev_dbg(dev, "  MajorVersion:   %d\n",
2673                         edge_serial->boot_descriptor.MajorVersion);
2674                 dev_dbg(dev, "  MinorVersion:   %d\n",
2675                         edge_serial->boot_descriptor.MinorVersion);
2676                 dev_dbg(dev, "  BuildNumber:    %d\n",
2677                         le16_to_cpu(edge_serial->boot_descriptor.BuildNumber));
2678                 dev_dbg(dev, "  Capabilities:   0x%x\n",
2679                       le16_to_cpu(edge_serial->boot_descriptor.Capabilities));
2680                 dev_dbg(dev, "  UConfig0:       %d\n",
2681                         edge_serial->boot_descriptor.UConfig0);
2682                 dev_dbg(dev, "  UConfig1:       %d\n",
2683                         edge_serial->boot_descriptor.UConfig1);
2684         }
2685 }
2686
2687
2688 /****************************************************************************
2689  * load_application_firmware
2690  *      This is called to load the application firmware to the device
2691  ****************************************************************************/
2692 static void load_application_firmware(struct edgeport_serial *edge_serial)
2693 {
2694         struct device *dev = &edge_serial->serial->dev->dev;
2695         const struct ihex_binrec *rec;
2696         const struct firmware *fw;
2697         const char *fw_name;
2698         const char *fw_info;
2699         int response;
2700         __u32 Operaddr;
2701         __u16 build;
2702
2703         switch (edge_serial->product_info.iDownloadFile) {
2704                 case EDGE_DOWNLOAD_FILE_I930:
2705                         fw_info = "downloading firmware version (930)";
2706                         fw_name = "/*(DEBLOBBED)*/";
2707                         break;
2708
2709                 case EDGE_DOWNLOAD_FILE_80251:
2710                         fw_info = "downloading firmware version (80251)";
2711                         fw_name = "/*(DEBLOBBED)*/";
2712                         break;
2713
2714                 case EDGE_DOWNLOAD_FILE_NONE:
2715                         dev_dbg(dev, "No download file specified, skipping download\n");
2716                         return;
2717
2718                 default:
2719                         return;
2720         }
2721
2722         response = reject_firmware(&fw, fw_name,
2723                                     &edge_serial->serial->dev->dev);
2724         if (response) {
2725                 dev_err(dev, "Failed to load image \"%s\" err %d\n",
2726                        fw_name, response);
2727                 return;
2728         }
2729
2730         rec = (const struct ihex_binrec *)fw->data;
2731         build = (rec->data[2] << 8) | rec->data[3];
2732
2733         dev_dbg(dev, "%s %d.%d.%d\n", fw_info, rec->data[0], rec->data[1], build);
2734
2735         edge_serial->product_info.FirmwareMajorVersion = rec->data[0];
2736         edge_serial->product_info.FirmwareMinorVersion = rec->data[1];
2737         edge_serial->product_info.FirmwareBuildNumber = cpu_to_le16(build);
2738
2739         for (rec = ihex_next_binrec(rec); rec;
2740              rec = ihex_next_binrec(rec)) {
2741                 Operaddr = be32_to_cpu(rec->addr);
2742                 response = sram_write(edge_serial->serial,
2743                                      Operaddr >> 16,
2744                                      Operaddr & 0xFFFF,
2745                                      be16_to_cpu(rec->len),
2746                                      &rec->data[0]);
2747                 if (response < 0) {
2748                         dev_err(&edge_serial->serial->dev->dev,
2749                                 "sram_write failed (%x, %x, %d)\n",
2750                                 Operaddr >> 16, Operaddr & 0xFFFF,
2751                                 be16_to_cpu(rec->len));
2752                         break;
2753                 }
2754         }
2755
2756         dev_dbg(dev, "sending exec_dl_code\n");
2757         response = usb_control_msg (edge_serial->serial->dev,
2758                                     usb_sndctrlpipe(edge_serial->serial->dev, 0),
2759                                     USB_REQUEST_ION_EXEC_DL_CODE,
2760                                     0x40, 0x4000, 0x0001, NULL, 0, 3000);
2761
2762         release_firmware(fw);
2763 }
2764
2765
2766 /****************************************************************************
2767  * edge_startup
2768  ****************************************************************************/
2769 static int edge_startup(struct usb_serial *serial)
2770 {
2771         struct edgeport_serial *edge_serial;
2772         struct usb_device *dev;
2773         struct device *ddev = &serial->dev->dev;
2774         int i;
2775         int response;
2776         bool interrupt_in_found;
2777         bool bulk_in_found;
2778         bool bulk_out_found;
2779         static __u32 descriptor[3] = {  EDGE_COMPATIBILITY_MASK0,
2780                                         EDGE_COMPATIBILITY_MASK1,
2781                                         EDGE_COMPATIBILITY_MASK2 };
2782
2783         if (serial->num_bulk_in < 1 || serial->num_interrupt_in < 1) {
2784                 dev_err(&serial->interface->dev, "missing endpoints\n");
2785                 return -ENODEV;
2786         }
2787
2788         dev = serial->dev;
2789
2790         /* create our private serial structure */
2791         edge_serial = kzalloc(sizeof(struct edgeport_serial), GFP_KERNEL);
2792         if (!edge_serial)
2793                 return -ENOMEM;
2794
2795         spin_lock_init(&edge_serial->es_lock);
2796         edge_serial->serial = serial;
2797         usb_set_serial_data(serial, edge_serial);
2798
2799         /* get the name for the device from the device */
2800         i = usb_string(dev, dev->descriptor.iManufacturer,
2801             &edge_serial->name[0], MAX_NAME_LEN+1);
2802         if (i < 0)
2803                 i = 0;
2804         edge_serial->name[i++] = ' ';
2805         usb_string(dev, dev->descriptor.iProduct,
2806             &edge_serial->name[i], MAX_NAME_LEN+2 - i);
2807
2808         dev_info(&serial->dev->dev, "%s detected\n", edge_serial->name);
2809
2810         /* Read the epic descriptor */
2811         if (get_epic_descriptor(edge_serial) < 0) {
2812                 /* memcpy descriptor to Supports structures */
2813                 memcpy(&edge_serial->epic_descriptor.Supports, descriptor,
2814                        sizeof(struct edge_compatibility_bits));
2815
2816                 /* get the manufacturing descriptor for this device */
2817                 get_manufacturing_desc(edge_serial);
2818
2819                 /* get the boot descriptor */
2820                 get_boot_desc(edge_serial);
2821
2822                 get_product_info(edge_serial);
2823         }
2824
2825         /* set the number of ports from the manufacturing description */
2826         /* serial->num_ports = serial->product_info.NumPorts; */
2827         if ((!edge_serial->is_epic) &&
2828             (edge_serial->product_info.NumPorts != serial->num_ports)) {
2829                 dev_warn(ddev,
2830                         "Device Reported %d serial ports vs. core thinking we have %d ports, email greg@kroah.com this information.\n",
2831                          edge_serial->product_info.NumPorts,
2832                          serial->num_ports);
2833         }
2834
2835         dev_dbg(ddev, "%s - time 1 %ld\n", __func__, jiffies);
2836
2837         /* If not an EPiC device */
2838         if (!edge_serial->is_epic) {
2839                 /* now load the application firmware into this device */
2840                 load_application_firmware(edge_serial);
2841
2842                 dev_dbg(ddev, "%s - time 2 %ld\n", __func__, jiffies);
2843
2844                 /* Check current Edgeport EEPROM and update if necessary */
2845                 update_edgeport_E2PROM(edge_serial);
2846
2847                 dev_dbg(ddev, "%s - time 3 %ld\n", __func__, jiffies);
2848
2849                 /* set the configuration to use #1 */
2850 /*              dev_dbg(ddev, "set_configuration 1\n"); */
2851 /*              usb_set_configuration (dev, 1); */
2852         }
2853         dev_dbg(ddev, "  FirmwareMajorVersion  %d.%d.%d\n",
2854             edge_serial->product_info.FirmwareMajorVersion,
2855             edge_serial->product_info.FirmwareMinorVersion,
2856             le16_to_cpu(edge_serial->product_info.FirmwareBuildNumber));
2857
2858         /* we set up the pointers to the endpoints in the edge_open function,
2859          * as the structures aren't created yet. */
2860
2861         response = 0;
2862
2863         if (edge_serial->is_epic) {
2864                 struct usb_host_interface *alt;
2865
2866                 alt = serial->interface->cur_altsetting;
2867
2868                 /* EPIC thing, set up our interrupt polling now and our read
2869                  * urb, so that the device knows it really is connected. */
2870                 interrupt_in_found = bulk_in_found = bulk_out_found = false;
2871                 for (i = 0; i < alt->desc.bNumEndpoints; ++i) {
2872                         struct usb_endpoint_descriptor *endpoint;
2873                         int buffer_size;
2874
2875                         endpoint = &alt->endpoint[i].desc;
2876                         buffer_size = usb_endpoint_maxp(endpoint);
2877                         if (!interrupt_in_found &&
2878                             (usb_endpoint_is_int_in(endpoint))) {
2879                                 /* we found a interrupt in endpoint */
2880                                 dev_dbg(ddev, "found interrupt in\n");
2881
2882                                 /* not set up yet, so do it now */
2883                                 edge_serial->interrupt_read_urb =
2884                                                 usb_alloc_urb(0, GFP_KERNEL);
2885                                 if (!edge_serial->interrupt_read_urb) {
2886                                         response = -ENOMEM;
2887                                         break;
2888                                 }
2889
2890                                 edge_serial->interrupt_in_buffer =
2891                                         kmalloc(buffer_size, GFP_KERNEL);
2892                                 if (!edge_serial->interrupt_in_buffer) {
2893                                         response = -ENOMEM;
2894                                         break;
2895                                 }
2896                                 edge_serial->interrupt_in_endpoint =
2897                                                 endpoint->bEndpointAddress;
2898
2899                                 /* set up our interrupt urb */
2900                                 usb_fill_int_urb(
2901                                         edge_serial->interrupt_read_urb,
2902                                         dev,
2903                                         usb_rcvintpipe(dev,
2904                                                 endpoint->bEndpointAddress),
2905                                         edge_serial->interrupt_in_buffer,
2906                                         buffer_size,
2907                                         edge_interrupt_callback,
2908                                         edge_serial,
2909                                         endpoint->bInterval);
2910
2911                                 interrupt_in_found = true;
2912                         }
2913
2914                         if (!bulk_in_found &&
2915                                 (usb_endpoint_is_bulk_in(endpoint))) {
2916                                 /* we found a bulk in endpoint */
2917                                 dev_dbg(ddev, "found bulk in\n");
2918
2919                                 /* not set up yet, so do it now */
2920                                 edge_serial->read_urb =
2921                                                 usb_alloc_urb(0, GFP_KERNEL);
2922                                 if (!edge_serial->read_urb) {
2923                                         response = -ENOMEM;
2924                                         break;
2925                                 }
2926
2927                                 edge_serial->bulk_in_buffer =
2928                                         kmalloc(buffer_size, GFP_KERNEL);
2929                                 if (!edge_serial->bulk_in_buffer) {
2930                                         response = -ENOMEM;
2931                                         break;
2932                                 }
2933                                 edge_serial->bulk_in_endpoint =
2934                                                 endpoint->bEndpointAddress;
2935
2936                                 /* set up our bulk in urb */
2937                                 usb_fill_bulk_urb(edge_serial->read_urb, dev,
2938                                         usb_rcvbulkpipe(dev,
2939                                                 endpoint->bEndpointAddress),
2940                                         edge_serial->bulk_in_buffer,
2941                                         usb_endpoint_maxp(endpoint),
2942                                         edge_bulk_in_callback,
2943                                         edge_serial);
2944                                 bulk_in_found = true;
2945                         }
2946
2947                         if (!bulk_out_found &&
2948                             (usb_endpoint_is_bulk_out(endpoint))) {
2949                                 /* we found a bulk out endpoint */
2950                                 dev_dbg(ddev, "found bulk out\n");
2951                                 edge_serial->bulk_out_endpoint =
2952                                                 endpoint->bEndpointAddress;
2953                                 bulk_out_found = true;
2954                         }
2955                 }
2956
2957                 if (response || !interrupt_in_found || !bulk_in_found ||
2958                                                         !bulk_out_found) {
2959                         if (!response) {
2960                                 dev_err(ddev, "expected endpoints not found\n");
2961                                 response = -ENODEV;
2962                         }
2963
2964                         usb_free_urb(edge_serial->interrupt_read_urb);
2965                         kfree(edge_serial->interrupt_in_buffer);
2966
2967                         usb_free_urb(edge_serial->read_urb);
2968                         kfree(edge_serial->bulk_in_buffer);
2969
2970                         kfree(edge_serial);
2971
2972                         return response;
2973                 }
2974
2975                 /* start interrupt read for this edgeport this interrupt will
2976                  * continue as long as the edgeport is connected */
2977                 response = usb_submit_urb(edge_serial->interrupt_read_urb,
2978                                                                 GFP_KERNEL);
2979                 if (response)
2980                         dev_err(ddev, "%s - Error %d submitting control urb\n",
2981                                 __func__, response);
2982         }
2983         return response;
2984 }
2985
2986
2987 /****************************************************************************
2988  * edge_disconnect
2989  *      This function is called whenever the device is removed from the usb bus.
2990  ****************************************************************************/
2991 static void edge_disconnect(struct usb_serial *serial)
2992 {
2993         struct edgeport_serial *edge_serial = usb_get_serial_data(serial);
2994
2995         if (edge_serial->is_epic) {
2996                 usb_kill_urb(edge_serial->interrupt_read_urb);
2997                 usb_kill_urb(edge_serial->read_urb);
2998         }
2999 }
3000
3001
3002 /****************************************************************************
3003  * edge_release
3004  *      This function is called when the device structure is deallocated.
3005  ****************************************************************************/
3006 static void edge_release(struct usb_serial *serial)
3007 {
3008         struct edgeport_serial *edge_serial = usb_get_serial_data(serial);
3009
3010         if (edge_serial->is_epic) {
3011                 usb_kill_urb(edge_serial->interrupt_read_urb);
3012                 usb_free_urb(edge_serial->interrupt_read_urb);
3013                 kfree(edge_serial->interrupt_in_buffer);
3014
3015                 usb_kill_urb(edge_serial->read_urb);
3016                 usb_free_urb(edge_serial->read_urb);
3017                 kfree(edge_serial->bulk_in_buffer);
3018         }
3019
3020         kfree(edge_serial);
3021 }
3022
3023 static int edge_port_probe(struct usb_serial_port *port)
3024 {
3025         struct edgeport_port *edge_port;
3026
3027         edge_port = kzalloc(sizeof(*edge_port), GFP_KERNEL);
3028         if (!edge_port)
3029                 return -ENOMEM;
3030
3031         spin_lock_init(&edge_port->ep_lock);
3032         edge_port->port = port;
3033
3034         usb_set_serial_port_data(port, edge_port);
3035
3036         return 0;
3037 }
3038
3039 static int edge_port_remove(struct usb_serial_port *port)
3040 {
3041         struct edgeport_port *edge_port;
3042
3043         edge_port = usb_get_serial_port_data(port);
3044         kfree(edge_port);
3045
3046         return 0;
3047 }
3048
3049 module_usb_serial_driver(serial_drivers, id_table_combined);
3050
3051 MODULE_AUTHOR(DRIVER_AUTHOR);
3052 MODULE_DESCRIPTION(DRIVER_DESC);
3053 MODULE_LICENSE("GPL");
3054 /*(DEBLOBBED)*/