drivers/usb/serial/io_edgeport.c

   1 /*
   2  * Edgeport USB Serial Converter driver
   3  *
   4  * Copyright (C) 2000 Inside Out Networks, All rights reserved.
   5  * Copyright (C) 2001-2002 Greg Kroah-Hartman <greg@kroah.com>
   6  *
   7  *      This program is free software; you can redistribute it and/or modify
   8  *      it under the terms of the GNU General Public License as published by
   9  *      the Free Software Foundation; either version 2 of the License, or
  10  *      (at your option) any later version.
  11  *
  12  * Supports the following devices:
  13  *      Edgeport/4
  14  *      Edgeport/4t
  15  *      Edgeport/2
  16  *      Edgeport/4i
  17  *      Edgeport/2i
  18  *      Edgeport/421
  19  *      Edgeport/21
  20  *      Rapidport/4
  21  *      Edgeport/8
  22  *      Edgeport/2D8
  23  *      Edgeport/4D8
  24  *      Edgeport/8i
  25  *
  26  * For questions or problems with this driver, contact Inside Out
  27  * Networks technical support, or Peter Berger <pberger@brimson.com>,
  28  * or Al Borchers <alborchers@steinerpoint.com>.
  29  *
  30  */
  31
  32 #include <linux/kernel.h>
  33 #include <linux/jiffies.h>
  34 #include <linux/errno.h>
  35 #include <linux/init.h>
  36 #include <linux/slab.h>
  37 #include <linux/tty.h>
  38 #include <linux/tty_driver.h>
  39 #include <linux/tty_flip.h>
  40 #include <linux/module.h>
  41 #include <linux/spinlock.h>
  42 #include <linux/serial.h>
  43 #include <linux/ioctl.h>
  44 #include <linux/wait.h>
  45 #include <linux/firmware.h>
  46 #include <linux/ihex.h>
  47 #include <linux/uaccess.h>
  48 #include <linux/usb.h>
  49 #include <linux/usb/serial.h>
  50 #include "io_edgeport.h"
  51 #include "io_ionsp.h"           /* info for the iosp messages */
  52 #include "io_16654.h"           /* 16654 UART defines */
  53
  54 #define DRIVER_AUTHOR "Greg Kroah-Hartman <greg@kroah.com> and David Iacovelli"
  55 #define DRIVER_DESC "Edgeport USB Serial Driver"
  56
  57 #define MAX_NAME_LEN            64
  58
  59 #define CHASE_TIMEOUT           (5*HZ)          /* 5 seconds */
  60 #define OPEN_TIMEOUT            (5*HZ)          /* 5 seconds */
  61 #define COMMAND_TIMEOUT         (5*HZ)          /* 5 seconds */
  62
  63 /* receive port state */
  64 enum RXSTATE {
  65         EXPECT_HDR1 = 0,    /* Expect header byte 1 */
  66         EXPECT_HDR2 = 1,    /* Expect header byte 2 */
  67         EXPECT_DATA = 2,    /* Expect 'RxBytesRemaining' data */
  68         EXPECT_HDR3 = 3,    /* Expect header byte 3 (for status hdrs only) */
  69 };
  70
  71
  72 /* Transmit Fifo
  73  * This Transmit queue is an extension of the edgeport Rx buffer.
  74  * The maximum amount of data buffered in both the edgeport
  75  * Rx buffer (maxTxCredits) and this buffer will never exceed maxTxCredits.
  76  */
  77 struct TxFifo {
  78         unsigned int    head;   /* index to head pointer (write) */
  79         unsigned int    tail;   /* index to tail pointer (read)  */
  80         unsigned int    count;  /* Bytes in queue */
  81         unsigned int    size;   /* Max size of queue (equal to Max number of TxCredits) */
  82         unsigned char   *fifo;  /* allocated Buffer */
  83 };
  84
  85 /* This structure holds all of the local port information */
  86 struct edgeport_port {
  87         __u16                   txCredits;              /* our current credits for this port */
  88         __u16                   maxTxCredits;           /* the max size of the port */
  89
  90         struct TxFifo           txfifo;                 /* transmit fifo -- size will be maxTxCredits */
  91         struct urb              *write_urb;             /* write URB for this port */
  92         bool                    write_in_progress;      /* 'true' while a write URB is outstanding */
  93         spinlock_t              ep_lock;
  94
  95         __u8                    shadowLCR;              /* last LCR value received */
  96         __u8                    shadowMCR;              /* last MCR value received */
  97         __u8                    shadowMSR;              /* last MSR value received */
  98         __u8                    shadowLSR;              /* last LSR value received */
  99         __u8                    shadowXonChar;          /* last value set as XON char in Edgeport */
 100         __u8                    shadowXoffChar;         /* last value set as XOFF char in Edgeport */
 101         __u8                    validDataMask;
 102         __u32                   baudRate;
 103
 104         bool                    open;
 105         bool                    openPending;
 106         bool                    commandPending;
 107         bool                    closePending;
 108         bool                    chaseResponsePending;
 109
 110         wait_queue_head_t       wait_chase;             /* for handling sleeping while waiting for chase to finish */
 111         wait_queue_head_t       wait_open;              /* for handling sleeping while waiting for open to finish */
 112         wait_queue_head_t       wait_command;           /* for handling sleeping while waiting for command to finish */
 113
 114         struct usb_serial_port  *port;                  /* loop back to the owner of this object */
 115 };
 116
 117
 118 /* This structure holds all of the individual device information */
 119 struct edgeport_serial {
 120         char                    name[MAX_NAME_LEN+2];           /* string name of this device */
 121
 122         struct edge_manuf_descriptor    manuf_descriptor;       /* the manufacturer descriptor */
 123         struct edge_boot_descriptor     boot_descriptor;        /* the boot firmware descriptor */
 124         struct edgeport_product_info    product_info;           /* Product Info */
 125         struct edge_compatibility_descriptor epic_descriptor;   /* Edgeport compatible descriptor */
 126         int                     is_epic;                        /* flag if EPiC device or not */
 127
 128         __u8                    interrupt_in_endpoint;          /* the interrupt endpoint handle */
 129         unsigned char           *interrupt_in_buffer;           /* the buffer we use for the interrupt endpoint */
 130         struct urb              *interrupt_read_urb;            /* our interrupt urb */
 131
 132         __u8                    bulk_in_endpoint;               /* the bulk in endpoint handle */
 133         unsigned char           *bulk_in_buffer;                /* the buffer we use for the bulk in endpoint */
 134         struct urb              *read_urb;                      /* our bulk read urb */
 135         bool                    read_in_progress;
 136         spinlock_t              es_lock;
 137
 138         __u8                    bulk_out_endpoint;              /* the bulk out endpoint handle */
 139
 140         __s16                   rxBytesAvail;                   /* the number of bytes that we need to read from this device */
 141
 142         enum RXSTATE            rxState;                        /* the current state of the bulk receive processor */
 143         __u8                    rxHeader1;                      /* receive header byte 1 */
 144         __u8                    rxHeader2;                      /* receive header byte 2 */
 145         __u8                    rxHeader3;                      /* receive header byte 3 */
 146         __u8                    rxPort;                         /* the port that we are currently receiving data for */
 147         __u8                    rxStatusCode;                   /* the receive status code */
 148         __u8                    rxStatusParam;                  /* the receive status paramater */
 149         __s16                   rxBytesRemaining;               /* the number of port bytes left to read */
 150         struct usb_serial       *serial;                        /* loop back to the owner of this object */
 151 };
 152
 153 /* baud rate information */
 154 struct divisor_table_entry {
 155         __u32   BaudRate;
 156         __u16  Divisor;
 157 };
 158
 159 /*
 160  * Define table of divisors for Rev A EdgePort/4 hardware
 161  * These assume a 3.6864MHz crystal, the standard /16, and
 162  * MCR.7 = 0.
 163  */
 164
 165 static const struct divisor_table_entry divisor_table[] = {
 166         {   50,         4608},
 167         {   75,         3072},
 168         {   110,        2095},  /* 2094.545455 => 230450   => .0217 % over */
 169         {   134,        1713},  /* 1713.011152 => 230398.5 => .00065% under */
 170         {   150,        1536},
 171         {   300,        768},
 172         {   600,        384},
 173         {   1200,       192},
 174         {   1800,       128},
 175         {   2400,       96},
 176         {   4800,       48},
 177         {   7200,       32},
 178         {   9600,       24},
 179         {   14400,      16},
 180         {   19200,      12},
 181         {   38400,      6},
 182         {   57600,      4},
 183         {   115200,     2},
 184         {   230400,     1},
 185 };
 186
 187 /* Number of outstanding Command Write Urbs */
 188 static atomic_t CmdUrbs = ATOMIC_INIT(0);
 189
 190
 191 /* local function prototypes */
 192
 193 /* function prototypes for all URB callbacks */
 194 static void edge_interrupt_callback(struct urb *urb);
 195 static void edge_bulk_in_callback(struct urb *urb);
 196 static void edge_bulk_out_data_callback(struct urb *urb);
 197 static void edge_bulk_out_cmd_callback(struct urb *urb);
 198
 199 /* function prototypes for the usbserial callbacks */
 200 static int edge_open(struct tty_struct *tty, struct usb_serial_port *port);
 201 static void edge_close(struct usb_serial_port *port);
 202 static int edge_write(struct tty_struct *tty, struct usb_serial_port *port,
 203                                         const unsigned char *buf, int count);
 204 static int edge_write_room(struct tty_struct *tty);
 205 static int edge_chars_in_buffer(struct tty_struct *tty);
 206 static void edge_throttle(struct tty_struct *tty);
 207 static void edge_unthrottle(struct tty_struct *tty);
 208 static void edge_set_termios(struct tty_struct *tty,
 209                                         struct usb_serial_port *port,
 210                                         struct ktermios *old_termios);
 211 static int  edge_ioctl(struct tty_struct *tty,
 212                                         unsigned int cmd, unsigned long arg);
 213 static void edge_break(struct tty_struct *tty, int break_state);
 214 static int  edge_tiocmget(struct tty_struct *tty);
 215 static int  edge_tiocmset(struct tty_struct *tty,
 216                                         unsigned int set, unsigned int clear);
 217 static int  edge_startup(struct usb_serial *serial);
 218 static void edge_disconnect(struct usb_serial *serial);
 219 static void edge_release(struct usb_serial *serial);
 220 static int edge_port_probe(struct usb_serial_port *port);
 221 static int edge_port_remove(struct usb_serial_port *port);
 222
 223 #include "io_tables.h"  /* all of the devices that this driver supports */
 224
 225 /* function prototypes for all of our local functions */
 226
 227 static void  process_rcvd_data(struct edgeport_serial *edge_serial,
 228                                 unsigned char *buffer, __u16 bufferLength);
 229 static void process_rcvd_status(struct edgeport_serial *edge_serial,
 230                                 __u8 byte2, __u8 byte3);
 231 static void edge_tty_recv(struct usb_serial_port *port, unsigned char *data,
 232                 int length);
 233 static void handle_new_msr(struct edgeport_port *edge_port, __u8 newMsr);
 234 static void handle_new_lsr(struct edgeport_port *edge_port, __u8 lsrData,
 235                                 __u8 lsr, __u8 data);
 236 static int  send_iosp_ext_cmd(struct edgeport_port *edge_port, __u8 command,
 237                                 __u8 param);
 238 static int  calc_baud_rate_divisor(struct device *dev, int baud_rate, int *divisor);
 239 static int  send_cmd_write_baud_rate(struct edgeport_port *edge_port,
 240                                 int baudRate);
 241 static void change_port_settings(struct tty_struct *tty,
 242                                 struct edgeport_port *edge_port,
 243                                 struct ktermios *old_termios);
 244 static int  send_cmd_write_uart_register(struct edgeport_port *edge_port,
 245                                 __u8 regNum, __u8 regValue);
 246 static int  write_cmd_usb(struct edgeport_port *edge_port,
 247                                 unsigned char *buffer, int writeLength);
 248 static void send_more_port_data(struct edgeport_serial *edge_serial,
 249                                 struct edgeport_port *edge_port);
 250
 251 static int sram_write(struct usb_serial *serial, __u16 extAddr, __u16 addr,
 252                                         __u16 length, const __u8 *data);
 253 static int rom_read(struct usb_serial *serial, __u16 extAddr, __u16 addr,
 254                                                 __u16 length, __u8 *data);
 255 static int rom_write(struct usb_serial *serial, __u16 extAddr, __u16 addr,
 256                                         __u16 length, const __u8 *data);
 257 static void get_manufacturing_desc(struct edgeport_serial *edge_serial);
 258 static void get_boot_desc(struct edgeport_serial *edge_serial);
 259 static void load_application_firmware(struct edgeport_serial *edge_serial);
 260
 261 static void unicode_to_ascii(char *string, int buflen,
 262                                 __le16 *unicode, int unicode_size);
 263
 264
 265 /* ************************************************************************ */
 266 /* ************************************************************************ */
 267 /* ************************************************************************ */
 268 /* ************************************************************************ */
 269
 270 /************************************************************************
 271  *                                                                      *
 272  * update_edgeport_E2PROM()     Compare current versions of             *
 273  *                              Boot ROM and Manufacture                *
 274  *                              Descriptors with versions               *
 275  *                              embedded in this driver                 *
 276  *                                                                      *
 277  ************************************************************************/
 278 static void update_edgeport_E2PROM(struct edgeport_serial *edge_serial)
 279 {
 280         struct device *dev = &edge_serial->serial->dev->dev;
 281         __u32 BootCurVer;
 282         __u32 BootNewVer;
 283         __u8 BootMajorVersion;
 284         __u8 BootMinorVersion;
 285         __u16 BootBuildNumber;
 286         __u32 Bootaddr;
 287         const struct ihex_binrec *rec;
 288         const struct firmware *fw;
 289         const char *fw_name;
 290         int response;
 291
 292         switch (edge_serial->product_info.iDownloadFile) {
 293         case EDGE_DOWNLOAD_FILE_I930:
 294                 fw_name = "edgeport/boot.fw";
 295                 break;
 296         case EDGE_DOWNLOAD_FILE_80251:
 297                 fw_name = "edgeport/boot2.fw";
 298                 break;
 299         default:
 300                 return;
 301         }
 302
 303         response = request_ihex_firmware(&fw, fw_name,
 304                                          &edge_serial->serial->dev->dev);
 305         if (response) {
 306                 dev_err(dev, "Failed to load image \"%s\" err %d\n",
 307                        fw_name, response);
 308                 return;
 309         }
 310
 311         rec = (const struct ihex_binrec *)fw->data;
 312         BootMajorVersion = rec->data[0];
 313         BootMinorVersion = rec->data[1];
 314         BootBuildNumber = (rec->data[2] << 8) | rec->data[3];
 315
 316         /* Check Boot Image Version */
 317         BootCurVer = (edge_serial->boot_descriptor.MajorVersion << 24) +
 318                      (edge_serial->boot_descriptor.MinorVersion << 16) +
 319                       le16_to_cpu(edge_serial->boot_descriptor.BuildNumber);
 320
 321         BootNewVer = (BootMajorVersion << 24) +
 322                      (BootMinorVersion << 16) +
 323                       BootBuildNumber;
 324
 325         dev_dbg(dev, "Current Boot Image version %d.%d.%d\n",
 326             edge_serial->boot_descriptor.MajorVersion,
 327             edge_serial->boot_descriptor.MinorVersion,
 328             le16_to_cpu(edge_serial->boot_descriptor.BuildNumber));
 329
 330
 331         if (BootNewVer > BootCurVer) {
 332                 dev_dbg(dev, "**Update Boot Image from %d.%d.%d to %d.%d.%d\n",
 333                     edge_serial->boot_descriptor.MajorVersion,
 334                     edge_serial->boot_descriptor.MinorVersion,
 335                     le16_to_cpu(edge_serial->boot_descriptor.BuildNumber),
 336                     BootMajorVersion, BootMinorVersion, BootBuildNumber);
 337
 338                 dev_dbg(dev, "Downloading new Boot Image\n");
 339
 340                 for (rec = ihex_next_binrec(rec); rec;
 341                      rec = ihex_next_binrec(rec)) {
 342                         Bootaddr = be32_to_cpu(rec->addr);
 343                         response = rom_write(edge_serial->serial,
 344                                              Bootaddr >> 16,
 345                                              Bootaddr & 0xFFFF,
 346                                              be16_to_cpu(rec->len),
 347                                              &rec->data[0]);
 348                         if (response < 0) {
 349                                 dev_err(&edge_serial->serial->dev->dev,
 350                                         "rom_write failed (%x, %x, %d)\n",
 351                                         Bootaddr >> 16, Bootaddr & 0xFFFF,
 352                                         be16_to_cpu(rec->len));
 353                                 break;
 354                         }
 355                 }
 356         } else {
 357                 dev_dbg(dev, "Boot Image -- already up to date\n");
 358         }
 359         release_firmware(fw);
 360 }
 361
 362 #if 0
 363 /************************************************************************
 364  *
 365  *  Get string descriptor from device
 366  *
 367  ************************************************************************/
 368 static int get_string_desc(struct usb_device *dev, int Id,
 369                                 struct usb_string_descriptor **pRetDesc)
 370 {
 371         struct usb_string_descriptor StringDesc;
 372         struct usb_string_descriptor *pStringDesc;
 373
 374         dev_dbg(&dev->dev, "%s - USB String ID = %d\n", __func__, Id);
 375
 376         if (!usb_get_descriptor(dev, USB_DT_STRING, Id, &StringDesc,
 377                                                 sizeof(StringDesc)))
 378                 return 0;
 379
 380         pStringDesc = kmalloc(StringDesc.bLength, GFP_KERNEL);
 381         if (!pStringDesc)
 382                 return -1;
 383
 384         if (!usb_get_descriptor(dev, USB_DT_STRING, Id, pStringDesc,
 385                                                         StringDesc.bLength)) {
 386                 kfree(pStringDesc);
 387                 return -1;
 388         }
 389
 390         *pRetDesc = pStringDesc;
 391         return 0;
 392 }
 393 #endif
 394
 395 static void dump_product_info(struct edgeport_serial *edge_serial,
 396                               struct edgeport_product_info *product_info)
 397 {
 398         struct device *dev = &edge_serial->serial->dev->dev;
 399
 400         /* Dump Product Info structure */
 401         dev_dbg(dev, "**Product Information:\n");
 402         dev_dbg(dev, "  ProductId             %x\n", product_info->ProductId);
 403         dev_dbg(dev, "  NumPorts              %d\n", product_info->NumPorts);
 404         dev_dbg(dev, "  ProdInfoVer           %d\n", product_info->ProdInfoVer);
 405         dev_dbg(dev, "  IsServer              %d\n", product_info->IsServer);
 406         dev_dbg(dev, "  IsRS232               %d\n", product_info->IsRS232);
 407         dev_dbg(dev, "  IsRS422               %d\n", product_info->IsRS422);
 408         dev_dbg(dev, "  IsRS485               %d\n", product_info->IsRS485);
 409         dev_dbg(dev, "  RomSize               %d\n", product_info->RomSize);
 410         dev_dbg(dev, "  RamSize               %d\n", product_info->RamSize);
 411         dev_dbg(dev, "  CpuRev                %x\n", product_info->CpuRev);
 412         dev_dbg(dev, "  BoardRev              %x\n", product_info->BoardRev);
 413         dev_dbg(dev, "  BootMajorVersion      %d.%d.%d\n",
 414                 product_info->BootMajorVersion,
 415                 product_info->BootMinorVersion,
 416                 le16_to_cpu(product_info->BootBuildNumber));
 417         dev_dbg(dev, "  FirmwareMajorVersion  %d.%d.%d\n",
 418                 product_info->FirmwareMajorVersion,
 419                 product_info->FirmwareMinorVersion,
 420                 le16_to_cpu(product_info->FirmwareBuildNumber));
 421         dev_dbg(dev, "  ManufactureDescDate   %d/%d/%d\n",
 422                 product_info->ManufactureDescDate[0],
 423                 product_info->ManufactureDescDate[1],
 424                 product_info->ManufactureDescDate[2]+1900);
 425         dev_dbg(dev, "  iDownloadFile         0x%x\n",
 426                 product_info->iDownloadFile);
 427         dev_dbg(dev, "  EpicVer               %d\n", product_info->EpicVer);
 428 }
 429
 430 static void get_product_info(struct edgeport_serial *edge_serial)
 431 {
 432         struct edgeport_product_info *product_info = &edge_serial->product_info;
 433
 434         memset(product_info, 0, sizeof(struct edgeport_product_info));
 435
 436         product_info->ProductId = (__u16)(le16_to_cpu(edge_serial->serial->dev->descriptor.idProduct) & ~ION_DEVICE_ID_80251_NETCHIP);
 437         product_info->NumPorts = edge_serial->manuf_descriptor.NumPorts;
 438         product_info->ProdInfoVer = 0;
 439
 440         product_info->RomSize = edge_serial->manuf_descriptor.RomSize;
 441         product_info->RamSize = edge_serial->manuf_descriptor.RamSize;
 442         product_info->CpuRev = edge_serial->manuf_descriptor.CpuRev;
 443         product_info->BoardRev = edge_serial->manuf_descriptor.BoardRev;
 444
 445         product_info->BootMajorVersion =
 446                                 edge_serial->boot_descriptor.MajorVersion;
 447         product_info->BootMinorVersion =
 448                                 edge_serial->boot_descriptor.MinorVersion;
 449         product_info->BootBuildNumber =
 450                                 edge_serial->boot_descriptor.BuildNumber;
 451
 452         memcpy(product_info->ManufactureDescDate,
 453                         edge_serial->manuf_descriptor.DescDate,
 454                         sizeof(edge_serial->manuf_descriptor.DescDate));
 455
 456         /* check if this is 2nd generation hardware */
 457         if (le16_to_cpu(edge_serial->serial->dev->descriptor.idProduct)
 458                                             & ION_DEVICE_ID_80251_NETCHIP)
 459                 product_info->iDownloadFile = EDGE_DOWNLOAD_FILE_80251;
 460         else
 461                 product_info->iDownloadFile = EDGE_DOWNLOAD_FILE_I930;
 462
 463         /* Determine Product type and set appropriate flags */
 464         switch (DEVICE_ID_FROM_USB_PRODUCT_ID(product_info->ProductId)) {
 465         case ION_DEVICE_ID_EDGEPORT_COMPATIBLE:
 466         case ION_DEVICE_ID_EDGEPORT_4T:
 467         case ION_DEVICE_ID_EDGEPORT_4:
 468         case ION_DEVICE_ID_EDGEPORT_2:
 469         case ION_DEVICE_ID_EDGEPORT_8_DUAL_CPU:
 470         case ION_DEVICE_ID_EDGEPORT_8:
 471         case ION_DEVICE_ID_EDGEPORT_421:
 472         case ION_DEVICE_ID_EDGEPORT_21:
 473         case ION_DEVICE_ID_EDGEPORT_2_DIN:
 474         case ION_DEVICE_ID_EDGEPORT_4_DIN:
 475         case ION_DEVICE_ID_EDGEPORT_16_DUAL_CPU:
 476                 product_info->IsRS232 = 1;
 477                 break;
 478
 479         case ION_DEVICE_ID_EDGEPORT_2I: /* Edgeport/2 RS422/RS485 */
 480                 product_info->IsRS422 = 1;
 481                 product_info->IsRS485 = 1;
 482                 break;
 483
 484         case ION_DEVICE_ID_EDGEPORT_8I: /* Edgeport/4 RS422 */
 485         case ION_DEVICE_ID_EDGEPORT_4I: /* Edgeport/4 RS422 */
 486                 product_info->IsRS422 = 1;
 487                 break;
 488         }
 489
 490         dump_product_info(edge_serial, product_info);
 491 }
 492
 493 static int get_epic_descriptor(struct edgeport_serial *ep)
 494 {
 495         int result;
 496         struct usb_serial *serial = ep->serial;
 497         struct edgeport_product_info *product_info = &ep->product_info;
 498         struct edge_compatibility_descriptor *epic = &ep->epic_descriptor;
 499         struct edge_compatibility_bits *bits;
 500         struct device *dev = &serial->dev->dev;
 501
 502         ep->is_epic = 0;
 503         result = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
 504                                  USB_REQUEST_ION_GET_EPIC_DESC,
 505                                  0xC0, 0x00, 0x00,
 506                                  &ep->epic_descriptor,
 507                                  sizeof(struct edge_compatibility_descriptor),
 508                                  300);
 509
 510         if (result > 0) {
 511                 ep->is_epic = 1;
 512                 memset(product_info, 0, sizeof(struct edgeport_product_info));
 513
 514                 product_info->NumPorts = epic->NumPorts;
 515                 product_info->ProdInfoVer = 0;
 516                 product_info->FirmwareMajorVersion = epic->MajorVersion;
 517                 product_info->FirmwareMinorVersion = epic->MinorVersion;
 518                 product_info->FirmwareBuildNumber = epic->BuildNumber;
 519                 product_info->iDownloadFile = epic->iDownloadFile;
 520                 product_info->EpicVer = epic->EpicVer;
 521                 product_info->Epic = epic->Supports;
 522                 product_info->ProductId = ION_DEVICE_ID_EDGEPORT_COMPATIBLE;
 523                 dump_product_info(ep, product_info);
 524
 525                 bits = &ep->epic_descriptor.Supports;
 526                 dev_dbg(dev, "**EPIC descriptor:\n");
 527                 dev_dbg(dev, "  VendEnableSuspend: %s\n", bits->VendEnableSuspend ? "TRUE": "FALSE");
 528                 dev_dbg(dev, "  IOSPOpen         : %s\n", bits->IOSPOpen        ? "TRUE": "FALSE");
 529                 dev_dbg(dev, "  IOSPClose        : %s\n", bits->IOSPClose       ? "TRUE": "FALSE");
 530                 dev_dbg(dev, "  IOSPChase        : %s\n", bits->IOSPChase       ? "TRUE": "FALSE");
 531                 dev_dbg(dev, "  IOSPSetRxFlow    : %s\n", bits->IOSPSetRxFlow   ? "TRUE": "FALSE");
 532                 dev_dbg(dev, "  IOSPSetTxFlow    : %s\n", bits->IOSPSetTxFlow   ? "TRUE": "FALSE");
 533                 dev_dbg(dev, "  IOSPSetXChar     : %s\n", bits->IOSPSetXChar    ? "TRUE": "FALSE");
 534                 dev_dbg(dev, "  IOSPRxCheck      : %s\n", bits->IOSPRxCheck     ? "TRUE": "FALSE");
 535                 dev_dbg(dev, "  IOSPSetClrBreak  : %s\n", bits->IOSPSetClrBreak ? "TRUE": "FALSE");
 536                 dev_dbg(dev, "  IOSPWriteMCR     : %s\n", bits->IOSPWriteMCR    ? "TRUE": "FALSE");
 537                 dev_dbg(dev, "  IOSPWriteLCR     : %s\n", bits->IOSPWriteLCR    ? "TRUE": "FALSE");
 538                 dev_dbg(dev, "  IOSPSetBaudRate  : %s\n", bits->IOSPSetBaudRate ? "TRUE": "FALSE");
 539                 dev_dbg(dev, "  TrueEdgeport     : %s\n", bits->TrueEdgeport    ? "TRUE": "FALSE");
 540         }
 541
 542         return result;
 543 }
 544
 545
 546 /************************************************************************/
 547 /************************************************************************/
 548 /*            U S B  C A L L B A C K   F U N C T I O N S                */
 549 /*            U S B  C A L L B A C K   F U N C T I O N S                */
 550 /************************************************************************/
 551 /************************************************************************/
 552
 553 /*****************************************************************************
 554  * edge_interrupt_callback
 555  *      this is the callback function for when we have received data on the
 556  *      interrupt endpoint.
 557  *****************************************************************************/
 558 static void edge_interrupt_callback(struct urb *urb)
 559 {
 560         struct edgeport_serial *edge_serial = urb->context;
 561         struct device *dev;
 562         struct edgeport_port *edge_port;
 563         struct usb_serial_port *port;
 564         unsigned char *data = urb->transfer_buffer;
 565         int length = urb->actual_length;
 566         int bytes_avail;
 567         int position;
 568         int txCredits;
 569         int portNumber;
 570         int result;
 571         int status = urb->status;
 572
 573         switch (status) {
 574         case 0:
 575                 /* success */
 576                 break;
 577         case -ECONNRESET:
 578         case -ENOENT:
 579         case -ESHUTDOWN:
 580                 /* this urb is terminated, clean up */
 581                 dev_dbg(&urb->dev->dev, "%s - urb shutting down with status: %d\n", __func__, status);
 582                 return;
 583         default:
 584                 dev_dbg(&urb->dev->dev, "%s - nonzero urb status received: %d\n", __func__, status);
 585                 goto exit;
 586         }
 587
 588         dev = &edge_serial->serial->dev->dev;
 589
 590         /* process this interrupt-read even if there are no ports open */
 591         if (length) {
 592                 usb_serial_debug_data(dev, __func__, length, data);
 593
 594                 if (length > 1) {
 595                         bytes_avail = data[0] | (data[1] << 8);
 596                         if (bytes_avail) {
 597                                 spin_lock(&edge_serial->es_lock);
 598                                 edge_serial->rxBytesAvail += bytes_avail;
 599                                 dev_dbg(dev,
 600                                         "%s - bytes_avail=%d, rxBytesAvail=%d, read_in_progress=%d\n",
 601                                         __func__, bytes_avail,
 602                                         edge_serial->rxBytesAvail,
 603                                         edge_serial->read_in_progress);
 604
 605                                 if (edge_serial->rxBytesAvail > 0 &&
 606                                     !edge_serial->read_in_progress) {
 607                                         dev_dbg(dev, "%s - posting a read\n", __func__);
 608                                         edge_serial->read_in_progress = true;
 609
 610                                         /* we have pending bytes on the
 611                                            bulk in pipe, send a request */
 612                                         result = usb_submit_urb(edge_serial->read_urb, GFP_ATOMIC);
 613                                         if (result) {
 614                                                 dev_err(dev,
 615                                                         "%s - usb_submit_urb(read bulk) failed with result = %d\n",
 616                                                         __func__, result);
 617                                                 edge_serial->read_in_progress = false;
 618                                         }
 619                                 }
 620                                 spin_unlock(&edge_serial->es_lock);
 621                         }
 622                 }
 623                 /* grab the txcredits for the ports if available */
 624                 position = 2;
 625                 portNumber = 0;
 626                 while ((position < length) &&
 627                                 (portNumber < edge_serial->serial->num_ports)) {
 628                         txCredits = data[position] | (data[position+1] << 8);
 629                         if (txCredits) {
 630                                 port = edge_serial->serial->port[portNumber];
 631                                 edge_port = usb_get_serial_port_data(port);
 632                                 if (edge_port->open) {
 633                                         spin_lock(&edge_port->ep_lock);
 634                                         edge_port->txCredits += txCredits;
 635                                         spin_unlock(&edge_port->ep_lock);
 636                                         dev_dbg(dev, "%s - txcredits for port%d = %d\n",
 637                                                 __func__, portNumber,
 638                                                 edge_port->txCredits);
 639
 640                                         /* tell the tty driver that something
 641                                            has changed */
 642                                         tty_port_tty_wakeup(&edge_port->port->port);
 643                                         /* Since we have more credit, check
 644                                            if more data can be sent */
 645                                         send_more_port_data(edge_serial,
 646                                                                 edge_port);
 647                                 }
 648                         }
 649                         position += 2;
 650                         ++portNumber;
 651                 }
 652         }
 653
 654 exit:
 655         result = usb_submit_urb(urb, GFP_ATOMIC);
 656         if (result)
 657                 dev_err(&urb->dev->dev,
 658                         "%s - Error %d submitting control urb\n",
 659                                                 __func__, result);
 660 }
 661
 662
 663 /*****************************************************************************
 664  * edge_bulk_in_callback
 665  *      this is the callback function for when we have received data on the
 666  *      bulk in endpoint.
 667  *****************************************************************************/
 668 static void edge_bulk_in_callback(struct urb *urb)
 669 {
 670         struct edgeport_serial  *edge_serial = urb->context;
 671         struct device *dev;
 672         unsigned char           *data = urb->transfer_buffer;
 673         int                     retval;
 674         __u16                   raw_data_length;
 675         int status = urb->status;
 676
 677         if (status) {
 678                 dev_dbg(&urb->dev->dev, "%s - nonzero read bulk status received: %d\n",
 679                         __func__, status);
 680                 edge_serial->read_in_progress = false;
 681                 return;
 682         }
 683
 684         if (urb->actual_length == 0) {
 685                 dev_dbg(&urb->dev->dev, "%s - read bulk callback with no data\n", __func__);
 686                 edge_serial->read_in_progress = false;
 687                 return;
 688         }
 689
 690         dev = &edge_serial->serial->dev->dev;
 691         raw_data_length = urb->actual_length;
 692
 693         usb_serial_debug_data(dev, __func__, raw_data_length, data);
 694
 695         spin_lock(&edge_serial->es_lock);
 696
 697         /* decrement our rxBytes available by the number that we just got */
 698         edge_serial->rxBytesAvail -= raw_data_length;
 699
 700         dev_dbg(dev, "%s - Received = %d, rxBytesAvail %d\n", __func__,
 701                 raw_data_length, edge_serial->rxBytesAvail);
 702
 703         process_rcvd_data(edge_serial, data, urb->actual_length);
 704
 705         /* check to see if there's any more data for us to read */
 706         if (edge_serial->rxBytesAvail > 0) {
 707                 dev_dbg(dev, "%s - posting a read\n", __func__);
 708                 retval = usb_submit_urb(edge_serial->read_urb, GFP_ATOMIC);
 709                 if (retval) {
 710                         dev_err(dev,
 711                                 "%s - usb_submit_urb(read bulk) failed, retval = %d\n",
 712                                 __func__, retval);
 713                         edge_serial->read_in_progress = false;
 714                 }
 715         } else {
 716                 edge_serial->read_in_progress = false;
 717         }
 718
 719         spin_unlock(&edge_serial->es_lock);
 720 }
 721
 722
 723 /*****************************************************************************
 724  * edge_bulk_out_data_callback
 725  *      this is the callback function for when we have finished sending
 726  *      serial data on the bulk out endpoint.
 727  *****************************************************************************/
 728 static void edge_bulk_out_data_callback(struct urb *urb)
 729 {
 730         struct edgeport_port *edge_port = urb->context;
 731         int status = urb->status;
 732
 733         if (status) {
 734                 dev_dbg(&urb->dev->dev,
 735                         "%s - nonzero write bulk status received: %d\n",
 736                         __func__, status);
 737         }
 738
 739         if (edge_port->open)
 740                 tty_port_tty_wakeup(&edge_port->port->port);
 741
 742         /* Release the Write URB */
 743         edge_port->write_in_progress = false;
 744
 745         /* Check if more data needs to be sent */
 746         send_more_port_data((struct edgeport_serial *)
 747                 (usb_get_serial_data(edge_port->port->serial)), edge_port);
 748 }
 749
 750
 751 /*****************************************************************************
 752  * BulkOutCmdCallback
 753  *      this is the callback function for when we have finished sending a
 754  *      command on the bulk out endpoint.
 755  *****************************************************************************/
 756 static void edge_bulk_out_cmd_callback(struct urb *urb)
 757 {
 758         struct edgeport_port *edge_port = urb->context;
 759         int status = urb->status;
 760
 761         atomic_dec(&CmdUrbs);
 762         dev_dbg(&urb->dev->dev, "%s - FREE URB %p (outstanding %d)\n",
 763                 __func__, urb, atomic_read(&CmdUrbs));
 764
 765
 766         /* clean up the transfer buffer */
 767         kfree(urb->transfer_buffer);
 768
 769         /* Free the command urb */
 770         usb_free_urb(urb);
 771
 772         if (status) {
 773                 dev_dbg(&urb->dev->dev,
 774                         "%s - nonzero write bulk status received: %d\n",
 775                         __func__, status);
 776                 return;
 777         }
 778
 779         /* tell the tty driver that something has changed */
 780         if (edge_port->open)
 781                 tty_port_tty_wakeup(&edge_port->port->port);
 782
 783         /* we have completed the command */
 784         edge_port->commandPending = false;
 785         wake_up(&edge_port->wait_command);
 786 }
 787
 788
 789 /*****************************************************************************
 790  * Driver tty interface functions
 791  *****************************************************************************/
 792
 793 /*****************************************************************************
 794  * SerialOpen
 795  *      this function is called by the tty driver when a port is opened
 796  *      If successful, we return 0
 797  *      Otherwise we return a negative error number.
 798  *****************************************************************************/
 799 static int edge_open(struct tty_struct *tty, struct usb_serial_port *port)
 800 {
 801         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
 802         struct device *dev = &port->dev;
 803         struct usb_serial *serial;
 804         struct edgeport_serial *edge_serial;
 805         int response;
 806
 807         if (edge_port == NULL)
 808                 return -ENODEV;
 809
 810         /* see if we've set up our endpoint info yet (can't set it up
 811            in edge_startup as the structures were not set up at that time.) */
 812         serial = port->serial;
 813         edge_serial = usb_get_serial_data(serial);
 814         if (edge_serial == NULL)
 815                 return -ENODEV;
 816         if (edge_serial->interrupt_in_buffer == NULL) {
 817                 struct usb_serial_port *port0 = serial->port[0];
 818
 819                 /* not set up yet, so do it now */
 820                 edge_serial->interrupt_in_buffer =
 821                                         port0->interrupt_in_buffer;
 822                 edge_serial->interrupt_in_endpoint =
 823                                         port0->interrupt_in_endpointAddress;
 824                 edge_serial->interrupt_read_urb = port0->interrupt_in_urb;
 825                 edge_serial->bulk_in_buffer = port0->bulk_in_buffer;
 826                 edge_serial->bulk_in_endpoint =
 827                                         port0->bulk_in_endpointAddress;
 828                 edge_serial->read_urb = port0->read_urb;
 829                 edge_serial->bulk_out_endpoint =
 830                                         port0->bulk_out_endpointAddress;
 831
 832                 /* set up our interrupt urb */
 833                 usb_fill_int_urb(edge_serial->interrupt_read_urb,
 834                       serial->dev,
 835                       usb_rcvintpipe(serial->dev,
 836                                 port0->interrupt_in_endpointAddress),
 837                       port0->interrupt_in_buffer,
 838                       edge_serial->interrupt_read_urb->transfer_buffer_length,
 839                       edge_interrupt_callback, edge_serial,
 840                       edge_serial->interrupt_read_urb->interval);
 841
 842                 /* set up our bulk in urb */
 843                 usb_fill_bulk_urb(edge_serial->read_urb, serial->dev,
 844                         usb_rcvbulkpipe(serial->dev,
 845                                 port0->bulk_in_endpointAddress),
 846                         port0->bulk_in_buffer,
 847                         edge_serial->read_urb->transfer_buffer_length,
 848                         edge_bulk_in_callback, edge_serial);
 849                 edge_serial->read_in_progress = false;
 850
 851                 /* start interrupt read for this edgeport
 852                  * this interrupt will continue as long
 853                  * as the edgeport is connected */
 854                 response = usb_submit_urb(edge_serial->interrupt_read_urb,
 855                                                                 GFP_KERNEL);
 856                 if (response) {
 857                         dev_err(dev, "%s - Error %d submitting control urb\n",
 858                                 __func__, response);
 859                 }
 860         }
 861
 862         /* initialize our wait queues */
 863         init_waitqueue_head(&edge_port->wait_open);
 864         init_waitqueue_head(&edge_port->wait_chase);
 865         init_waitqueue_head(&edge_port->wait_command);
 866
 867         /* initialize our port settings */
 868         edge_port->txCredits = 0;       /* Can't send any data yet */
 869         /* Must always set this bit to enable ints! */
 870         edge_port->shadowMCR = MCR_MASTER_IE;
 871         edge_port->chaseResponsePending = false;
 872
 873         /* send a open port command */
 874         edge_port->openPending = true;
 875         edge_port->open        = false;
 876         response = send_iosp_ext_cmd(edge_port, IOSP_CMD_OPEN_PORT, 0);
 877
 878         if (response < 0) {
 879                 dev_err(dev, "%s - error sending open port command\n", __func__);
 880                 edge_port->openPending = false;
 881                 return -ENODEV;
 882         }
 883
 884         /* now wait for the port to be completely opened */
 885         wait_event_timeout(edge_port->wait_open, !edge_port->openPending,
 886                                                                 OPEN_TIMEOUT);
 887
 888         if (!edge_port->open) {
 889                 /* open timed out */
 890                 dev_dbg(dev, "%s - open timedout\n", __func__);
 891                 edge_port->openPending = false;
 892                 return -ENODEV;
 893         }
 894
 895         /* create the txfifo */
 896         edge_port->txfifo.head  = 0;
 897         edge_port->txfifo.tail  = 0;
 898         edge_port->txfifo.count = 0;
 899         edge_port->txfifo.size  = edge_port->maxTxCredits;
 900         edge_port->txfifo.fifo  = kmalloc(edge_port->maxTxCredits, GFP_KERNEL);
 901
 902         if (!edge_port->txfifo.fifo) {
 903                 dev_dbg(dev, "%s - no memory\n", __func__);
 904                 edge_close(port);
 905                 return -ENOMEM;
 906         }
 907
 908         /* Allocate a URB for the write */
 909         edge_port->write_urb = usb_alloc_urb(0, GFP_KERNEL);
 910         edge_port->write_in_progress = false;
 911
 912         if (!edge_port->write_urb) {
 913                 dev_dbg(dev, "%s - no memory\n", __func__);
 914                 edge_close(port);
 915                 return -ENOMEM;
 916         }
 917
 918         dev_dbg(dev, "%s(%d) - Initialize TX fifo to %d bytes\n",
 919                 __func__, port->number, edge_port->maxTxCredits);
 920
 921         return 0;
 922 }
 923
 924
 925 /************************************************************************
 926  *
 927  * block_until_chase_response
 928  *
 929  *      This function will block the close until one of the following:
 930  *              1. Response to our Chase comes from Edgeport
 931  *              2. A timeout of 10 seconds without activity has expired
 932  *                 (1K of Edgeport data @ 2400 baud ==> 4 sec to empty)
 933  *
 934  ************************************************************************/
 935 static void block_until_chase_response(struct edgeport_port *edge_port)
 936 {
 937         struct device *dev = &edge_port->port->dev;
 938         DEFINE_WAIT(wait);
 939         __u16 lastCredits;
 940         int timeout = 1*HZ;
 941         int loop = 10;
 942
 943         while (1) {
 944                 /* Save Last credits */
 945                 lastCredits = edge_port->txCredits;
 946
 947                 /* Did we get our Chase response */
 948                 if (!edge_port->chaseResponsePending) {
 949                         dev_dbg(dev, "%s - Got Chase Response\n", __func__);
 950
 951                         /* did we get all of our credit back? */
 952                         if (edge_port->txCredits == edge_port->maxTxCredits) {
 953                                 dev_dbg(dev, "%s - Got all credits\n", __func__);
 954                                 return;
 955                         }
 956                 }
 957
 958                 /* Block the thread for a while */
 959                 prepare_to_wait(&edge_port->wait_chase, &wait,
 960                                                 TASK_UNINTERRUPTIBLE);
 961                 schedule_timeout(timeout);
 962                 finish_wait(&edge_port->wait_chase, &wait);
 963
 964                 if (lastCredits == edge_port->txCredits) {
 965                         /* No activity.. count down. */
 966                         loop--;
 967                         if (loop == 0) {
 968                                 edge_port->chaseResponsePending = false;
 969                                 dev_dbg(dev, "%s - Chase TIMEOUT\n", __func__);
 970                                 return;
 971                         }
 972                 } else {
 973                         /* Reset timeout value back to 10 seconds */
 974                         dev_dbg(dev, "%s - Last %d, Current %d\n", __func__,
 975                                         lastCredits, edge_port->txCredits);
 976                         loop = 10;
 977                 }
 978         }
 979 }
 980
 981
 982 /************************************************************************
 983  *
 984  * block_until_tx_empty
 985  *
 986  *      This function will block the close until one of the following:
 987  *              1. TX count are 0
 988  *              2. The edgeport has stopped
 989  *              3. A timeout of 3 seconds without activity has expired
 990  *
 991  ************************************************************************/
 992 static void block_until_tx_empty(struct edgeport_port *edge_port)
 993 {
 994         struct device *dev = &edge_port->port->dev;
 995         DEFINE_WAIT(wait);
 996         struct TxFifo *fifo = &edge_port->txfifo;
 997         __u32 lastCount;
 998         int timeout = HZ/10;
 999         int loop = 30;
1000
1001         while (1) {
1002                 /* Save Last count */
1003                 lastCount = fifo->count;
1004
1005                 /* Is the Edgeport Buffer empty? */
1006                 if (lastCount == 0) {
1007                         dev_dbg(dev, "%s - TX Buffer Empty\n", __func__);
1008                         return;
1009                 }
1010
1011                 /* Block the thread for a while */
1012                 prepare_to_wait(&edge_port->wait_chase, &wait,
1013                                                 TASK_UNINTERRUPTIBLE);
1014                 schedule_timeout(timeout);
1015                 finish_wait(&edge_port->wait_chase, &wait);
1016
1017                 dev_dbg(dev, "%s wait\n", __func__);
1018
1019                 if (lastCount == fifo->count) {
1020                         /* No activity.. count down. */
1021                         loop--;
1022                         if (loop == 0) {
1023                                 dev_dbg(dev, "%s - TIMEOUT\n", __func__);
1024                                 return;
1025                         }
1026                 } else {
1027                         /* Reset timeout value back to seconds */
1028                         loop = 30;
1029                 }
1030         }
1031 }
1032
1033
1034 /*****************************************************************************
1035  * edge_close
1036  *      this function is called by the tty driver when a port is closed
1037  *****************************************************************************/
1038 static void edge_close(struct usb_serial_port *port)
1039 {
1040         struct edgeport_serial *edge_serial;
1041         struct edgeport_port *edge_port;
1042         int status;
1043
1044         edge_serial = usb_get_serial_data(port->serial);
1045         edge_port = usb_get_serial_port_data(port);
1046         if (edge_serial == NULL || edge_port == NULL)
1047                 return;
1048
1049         /* block until tx is empty */
1050         block_until_tx_empty(edge_port);
1051
1052         edge_port->closePending = true;
1053
1054         if ((!edge_serial->is_epic) ||
1055             ((edge_serial->is_epic) &&
1056              (edge_serial->epic_descriptor.Supports.IOSPChase))) {
1057                 /* flush and chase */
1058                 edge_port->chaseResponsePending = true;
1059
1060                 dev_dbg(&port->dev, "%s - Sending IOSP_CMD_CHASE_PORT\n", __func__);
1061                 status = send_iosp_ext_cmd(edge_port, IOSP_CMD_CHASE_PORT, 0);
1062                 if (status == 0)
1063                         /* block until chase finished */
1064                         block_until_chase_response(edge_port);
1065                 else
1066                         edge_port->chaseResponsePending = false;
1067         }
1068
1069         if ((!edge_serial->is_epic) ||
1070             ((edge_serial->is_epic) &&
1071              (edge_serial->epic_descriptor.Supports.IOSPClose))) {
1072                /* close the port */
1073                 dev_dbg(&port->dev, "%s - Sending IOSP_CMD_CLOSE_PORT\n", __func__);
1074                 send_iosp_ext_cmd(edge_port, IOSP_CMD_CLOSE_PORT, 0);
1075         }
1076
1077         /* port->close = true; */
1078         edge_port->closePending = false;
1079         edge_port->open = false;
1080         edge_port->openPending = false;
1081
1082         usb_kill_urb(edge_port->write_urb);
1083
1084         if (edge_port->write_urb) {
1085                 /* if this urb had a transfer buffer already
1086                                 (old transfer) free it */
1087                 kfree(edge_port->write_urb->transfer_buffer);
1088                 usb_free_urb(edge_port->write_urb);
1089                 edge_port->write_urb = NULL;
1090         }
1091         kfree(edge_port->txfifo.fifo);
1092         edge_port->txfifo.fifo = NULL;
1093 }
1094
1095 /*****************************************************************************
1096  * SerialWrite
1097  *      this function is called by the tty driver when data should be written
1098  *      to the port.
1099  *      If successful, we return the number of bytes written, otherwise we
1100  *      return a negative error number.
1101  *****************************************************************************/
1102 static int edge_write(struct tty_struct *tty, struct usb_serial_port *port,
1103                                         const unsigned char *data, int count)
1104 {
1105         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1106         struct TxFifo *fifo;
1107         int copySize;
1108         int bytesleft;
1109         int firsthalf;
1110         int secondhalf;
1111         unsigned long flags;
1112
1113         if (edge_port == NULL)
1114                 return -ENODEV;
1115
1116         /* get a pointer to the Tx fifo */
1117         fifo = &edge_port->txfifo;
1118
1119         spin_lock_irqsave(&edge_port->ep_lock, flags);
1120
1121         /* calculate number of bytes to put in fifo */
1122         copySize = min((unsigned int)count,
1123                                 (edge_port->txCredits - fifo->count));
1124
1125         dev_dbg(&port->dev, "%s(%d) of %d byte(s) Fifo room  %d -- will copy %d bytes\n",
1126                 __func__, port->number, count,
1127                         edge_port->txCredits - fifo->count, copySize);
1128
1129         /* catch writes of 0 bytes which the tty driver likes to give us,
1130            and when txCredits is empty */
1131         if (copySize == 0) {
1132                 dev_dbg(&port->dev, "%s - copySize = Zero\n", __func__);
1133                 goto finish_write;
1134         }
1135
1136         /* queue the data
1137          * since we can never overflow the buffer we do not have to check for a
1138          * full condition
1139          *
1140          * the copy is done is two parts -- first fill to the end of the buffer
1141          * then copy the reset from the start of the buffer
1142          */
1143         bytesleft = fifo->size - fifo->head;
1144         firsthalf = min(bytesleft, copySize);
1145         dev_dbg(&port->dev, "%s - copy %d bytes of %d into fifo \n", __func__,
1146                 firsthalf, bytesleft);
1147
1148         /* now copy our data */
1149         memcpy(&fifo->fifo[fifo->head], data, firsthalf);
1150         usb_serial_debug_data(&port->dev, __func__, firsthalf, &fifo->fifo[fifo->head]);
1151
1152         /* update the index and size */
1153         fifo->head  += firsthalf;
1154         fifo->count += firsthalf;
1155
1156         /* wrap the index */
1157         if (fifo->head == fifo->size)
1158                 fifo->head = 0;
1159
1160         secondhalf = copySize-firsthalf;
1161
1162         if (secondhalf) {
1163                 dev_dbg(&port->dev, "%s - copy rest of data %d\n", __func__, secondhalf);
1164                 memcpy(&fifo->fifo[fifo->head], &data[firsthalf], secondhalf);
1165                 usb_serial_debug_data(&port->dev, __func__, secondhalf, &fifo->fifo[fifo->head]);
1166                 /* update the index and size */
1167                 fifo->count += secondhalf;
1168                 fifo->head  += secondhalf;
1169                 /* No need to check for wrap since we can not get to end of
1170                  * the fifo in this part
1171                  */
1172         }
1173
1174 finish_write:
1175         spin_unlock_irqrestore(&edge_port->ep_lock, flags);
1176
1177         send_more_port_data((struct edgeport_serial *)
1178                         usb_get_serial_data(port->serial), edge_port);
1179
1180         dev_dbg(&port->dev, "%s wrote %d byte(s) TxCredits %d, Fifo %d\n",
1181                 __func__, copySize, edge_port->txCredits, fifo->count);
1182
1183         return copySize;
1184 }
1185
1186
1187 /************************************************************************
1188  *
1189  * send_more_port_data()
1190  *
1191  *      This routine attempts to write additional UART transmit data
1192  *      to a port over the USB bulk pipe. It is called (1) when new
1193  *      data has been written to a port's TxBuffer from higher layers
1194  *      (2) when the peripheral sends us additional TxCredits indicating
1195  *      that it can accept more Tx data for a given port; and (3) when
1196  *      a bulk write completes successfully and we want to see if we
1197  *      can transmit more.
1198  *
1199  ************************************************************************/
1200 static void send_more_port_data(struct edgeport_serial *edge_serial,
1201                                         struct edgeport_port *edge_port)
1202 {
1203         struct TxFifo   *fifo = &edge_port->txfifo;
1204         struct device   *dev = &edge_port->port->dev;
1205         struct urb      *urb;
1206         unsigned char   *buffer;
1207         int             status;
1208         int             count;
1209         int             bytesleft;
1210         int             firsthalf;
1211         int             secondhalf;
1212         unsigned long   flags;
1213
1214         spin_lock_irqsave(&edge_port->ep_lock, flags);
1215
1216         if (edge_port->write_in_progress ||
1217             !edge_port->open             ||
1218             (fifo->count == 0)) {
1219                 dev_dbg(dev, "%s(%d) EXIT - fifo %d, PendingWrite = %d\n",
1220                         __func__, edge_port->port->number,
1221                         fifo->count, edge_port->write_in_progress);
1222                 goto exit_send;
1223         }
1224
1225         /* since the amount of data in the fifo will always fit into the
1226          * edgeport buffer we do not need to check the write length
1227          *
1228          * Do we have enough credits for this port to make it worthwhile
1229          * to bother queueing a write. If it's too small, say a few bytes,
1230          * it's better to wait for more credits so we can do a larger write.
1231          */
1232         if (edge_port->txCredits < EDGE_FW_GET_TX_CREDITS_SEND_THRESHOLD(edge_port->maxTxCredits, EDGE_FW_BULK_MAX_PACKET_SIZE)) {
1233                 dev_dbg(dev, "%s(%d) Not enough credit - fifo %d TxCredit %d\n",
1234                         __func__, edge_port->port->number, fifo->count,
1235                         edge_port->txCredits);
1236                 goto exit_send;
1237         }
1238
1239         /* lock this write */
1240         edge_port->write_in_progress = true;
1241
1242         /* get a pointer to the write_urb */
1243         urb = edge_port->write_urb;
1244
1245         /* make sure transfer buffer is freed */
1246         kfree(urb->transfer_buffer);
1247         urb->transfer_buffer = NULL;
1248
1249         /* build the data header for the buffer and port that we are about
1250            to send out */
1251         count = fifo->count;
1252         buffer = kmalloc(count+2, GFP_ATOMIC);
1253         if (buffer == NULL) {
1254                 dev_err_console(edge_port->port,
1255                                 "%s - no more kernel memory...\n", __func__);
1256                 edge_port->write_in_progress = false;
1257                 goto exit_send;
1258         }
1259         buffer[0] = IOSP_BUILD_DATA_HDR1(edge_port->port->number
1260                                 - edge_port->port->serial->minor, count);
1261         buffer[1] = IOSP_BUILD_DATA_HDR2(edge_port->port->number
1262                                 - edge_port->port->serial->minor, 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(port %d) - returns %d\n", __func__,
1381                         port->number, num_chars);
1382         }
1383
1384         return num_chars;
1385 }
1386
1387
1388 /*****************************************************************************
1389  * SerialThrottle
1390  *      this function is called by the tty driver when it wants to stop the data
1391  *      being read from the port.
1392  *****************************************************************************/
1393 static void edge_throttle(struct tty_struct *tty)
1394 {
1395         struct usb_serial_port *port = tty->driver_data;
1396         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1397         int status;
1398
1399         if (edge_port == NULL)
1400                 return;
1401
1402         if (!edge_port->open) {
1403                 dev_dbg(&port->dev, "%s - port not opened\n", __func__);
1404                 return;
1405         }
1406
1407         /* if we are implementing XON/XOFF, send the stop character */
1408         if (I_IXOFF(tty)) {
1409                 unsigned char stop_char = STOP_CHAR(tty);
1410                 status = edge_write(tty, port, &stop_char, 1);
1411                 if (status <= 0)
1412                         return;
1413         }
1414
1415         /* if we are implementing RTS/CTS, toggle that line */
1416         if (tty->termios.c_cflag & CRTSCTS) {
1417                 edge_port->shadowMCR &= ~MCR_RTS;
1418                 status = send_cmd_write_uart_register(edge_port, MCR,
1419                                                         edge_port->shadowMCR);
1420                 if (status != 0)
1421                         return;
1422         }
1423 }
1424
1425
1426 /*****************************************************************************
1427  * edge_unthrottle
1428  *      this function is called by the tty driver when it wants to resume the
1429  *      data being read from the port (called after SerialThrottle is called)
1430  *****************************************************************************/
1431 static void edge_unthrottle(struct tty_struct *tty)
1432 {
1433         struct usb_serial_port *port = tty->driver_data;
1434         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1435         int status;
1436
1437         if (edge_port == NULL)
1438                 return;
1439
1440         if (!edge_port->open) {
1441                 dev_dbg(&port->dev, "%s - port not opened\n", __func__);
1442                 return;
1443         }
1444
1445         /* if we are implementing XON/XOFF, send the start character */
1446         if (I_IXOFF(tty)) {
1447                 unsigned char start_char = START_CHAR(tty);
1448                 status = edge_write(tty, port, &start_char, 1);
1449                 if (status <= 0)
1450                         return;
1451         }
1452         /* if we are implementing RTS/CTS, toggle that line */
1453         if (tty->termios.c_cflag & CRTSCTS) {
1454                 edge_port->shadowMCR |= MCR_RTS;
1455                 send_cmd_write_uart_register(edge_port, MCR,
1456                                                 edge_port->shadowMCR);
1457         }
1458 }
1459
1460
1461 /*****************************************************************************
1462  * SerialSetTermios
1463  *      this function is called by the tty driver when it wants to change
1464  * the termios structure
1465  *****************************************************************************/
1466 static void edge_set_termios(struct tty_struct *tty,
1467         struct usb_serial_port *port, struct ktermios *old_termios)
1468 {
1469         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1470         unsigned int cflag;
1471
1472         cflag = tty->termios.c_cflag;
1473         dev_dbg(&port->dev, "%s - clfag %08x iflag %08x\n", __func__, tty->termios.c_cflag, tty->termios.c_iflag);
1474         dev_dbg(&port->dev, "%s - old clfag %08x old iflag %08x\n", __func__, old_termios->c_cflag, old_termios->c_iflag);
1475
1476         if (edge_port == NULL)
1477                 return;
1478
1479         if (!edge_port->open) {
1480                 dev_dbg(&port->dev, "%s - port not opened\n", __func__);
1481                 return;
1482         }
1483
1484         /* change the port settings to the new ones specified */
1485         change_port_settings(tty, edge_port, old_termios);
1486 }
1487
1488
1489 /*****************************************************************************
1490  * get_lsr_info - get line status register info
1491  *
1492  * Purpose: Let user call ioctl() to get info when the UART physically
1493  *          is emptied.  On bus types like RS485, the transmitter must
1494  *          release the bus after transmitting. This must be done when
1495  *          the transmit shift register is empty, not be done when the
1496  *          transmit holding register is empty.  This functionality
1497  *          allows an RS485 driver to be written in user space.
1498  *****************************************************************************/
1499 static int get_lsr_info(struct edgeport_port *edge_port,
1500                                                 unsigned int __user *value)
1501 {
1502         unsigned int result = 0;
1503         unsigned long flags;
1504
1505         spin_lock_irqsave(&edge_port->ep_lock, flags);
1506         if (edge_port->maxTxCredits == edge_port->txCredits &&
1507             edge_port->txfifo.count == 0) {
1508                 dev_dbg(&edge_port->port->dev, "%s -- Empty\n", __func__);
1509                 result = TIOCSER_TEMT;
1510         }
1511         spin_unlock_irqrestore(&edge_port->ep_lock, flags);
1512
1513         if (copy_to_user(value, &result, sizeof(int)))
1514                 return -EFAULT;
1515         return 0;
1516 }
1517
1518 static int edge_tiocmset(struct tty_struct *tty,
1519                                         unsigned int set, unsigned int clear)
1520 {
1521         struct usb_serial_port *port = tty->driver_data;
1522         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1523         unsigned int mcr;
1524
1525         mcr = edge_port->shadowMCR;
1526         if (set & TIOCM_RTS)
1527                 mcr |= MCR_RTS;
1528         if (set & TIOCM_DTR)
1529                 mcr |= MCR_DTR;
1530         if (set & TIOCM_LOOP)
1531                 mcr |= MCR_LOOPBACK;
1532
1533         if (clear & TIOCM_RTS)
1534                 mcr &= ~MCR_RTS;
1535         if (clear & TIOCM_DTR)
1536                 mcr &= ~MCR_DTR;
1537         if (clear & TIOCM_LOOP)
1538                 mcr &= ~MCR_LOOPBACK;
1539
1540         edge_port->shadowMCR = mcr;
1541
1542         send_cmd_write_uart_register(edge_port, MCR, edge_port->shadowMCR);
1543
1544         return 0;
1545 }
1546
1547 static int edge_tiocmget(struct tty_struct *tty)
1548 {
1549         struct usb_serial_port *port = tty->driver_data;
1550         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1551         unsigned int result = 0;
1552         unsigned int msr;
1553         unsigned int mcr;
1554
1555         msr = edge_port->shadowMSR;
1556         mcr = edge_port->shadowMCR;
1557         result = ((mcr & MCR_DTR)       ? TIOCM_DTR: 0)   /* 0x002 */
1558                   | ((mcr & MCR_RTS)    ? TIOCM_RTS: 0)   /* 0x004 */
1559                   | ((msr & EDGEPORT_MSR_CTS)   ? TIOCM_CTS: 0)   /* 0x020 */
1560                   | ((msr & EDGEPORT_MSR_CD)    ? TIOCM_CAR: 0)   /* 0x040 */
1561                   | ((msr & EDGEPORT_MSR_RI)    ? TIOCM_RI:  0)   /* 0x080 */
1562                   | ((msr & EDGEPORT_MSR_DSR)   ? TIOCM_DSR: 0);  /* 0x100 */
1563
1564         return result;
1565 }
1566
1567 static int get_serial_info(struct edgeport_port *edge_port,
1568                                 struct serial_struct __user *retinfo)
1569 {
1570         struct serial_struct tmp;
1571
1572         if (!retinfo)
1573                 return -EFAULT;
1574
1575         memset(&tmp, 0, sizeof(tmp));
1576
1577         tmp.type                = PORT_16550A;
1578         tmp.line                = edge_port->port->serial->minor;
1579         tmp.port                = edge_port->port->number;
1580         tmp.irq                 = 0;
1581         tmp.flags               = ASYNC_SKIP_TEST | ASYNC_AUTO_IRQ;
1582         tmp.xmit_fifo_size      = edge_port->maxTxCredits;
1583         tmp.baud_base           = 9600;
1584         tmp.close_delay         = 5*HZ;
1585         tmp.closing_wait        = 30*HZ;
1586
1587         if (copy_to_user(retinfo, &tmp, sizeof(*retinfo)))
1588                 return -EFAULT;
1589         return 0;
1590 }
1591
1592
1593 /*****************************************************************************
1594  * SerialIoctl
1595  *      this function handles any ioctl calls to the driver
1596  *****************************************************************************/
1597 static int edge_ioctl(struct tty_struct *tty,
1598                                         unsigned int cmd, unsigned long arg)
1599 {
1600         struct usb_serial_port *port = tty->driver_data;
1601         DEFINE_WAIT(wait);
1602         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1603
1604         dev_dbg(&port->dev, "%s - port %d, cmd = 0x%x\n", __func__, port->number, cmd);
1605
1606         switch (cmd) {
1607         case TIOCSERGETLSR:
1608                 dev_dbg(&port->dev, "%s (%d) TIOCSERGETLSR\n", __func__,  port->number);
1609                 return get_lsr_info(edge_port, (unsigned int __user *) arg);
1610
1611         case TIOCGSERIAL:
1612                 dev_dbg(&port->dev, "%s (%d) TIOCGSERIAL\n", __func__,  port->number);
1613                 return get_serial_info(edge_port, (struct serial_struct __user *) arg);
1614         }
1615         return -ENOIOCTLCMD;
1616 }
1617
1618
1619 /*****************************************************************************
1620  * SerialBreak
1621  *      this function sends a break to the port
1622  *****************************************************************************/
1623 static void edge_break(struct tty_struct *tty, int break_state)
1624 {
1625         struct usb_serial_port *port = tty->driver_data;
1626         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1627         struct edgeport_serial *edge_serial = usb_get_serial_data(port->serial);
1628         int status;
1629
1630         if ((!edge_serial->is_epic) ||
1631             ((edge_serial->is_epic) &&
1632              (edge_serial->epic_descriptor.Supports.IOSPChase))) {
1633                 /* flush and chase */
1634                 edge_port->chaseResponsePending = true;
1635
1636                 dev_dbg(&port->dev, "%s - Sending IOSP_CMD_CHASE_PORT\n", __func__);
1637                 status = send_iosp_ext_cmd(edge_port, IOSP_CMD_CHASE_PORT, 0);
1638                 if (status == 0) {
1639                         /* block until chase finished */
1640                         block_until_chase_response(edge_port);
1641                 } else {
1642                         edge_port->chaseResponsePending = false;
1643                 }
1644         }
1645
1646         if ((!edge_serial->is_epic) ||
1647             ((edge_serial->is_epic) &&
1648              (edge_serial->epic_descriptor.Supports.IOSPSetClrBreak))) {
1649                 if (break_state == -1) {
1650                         dev_dbg(&port->dev, "%s - Sending IOSP_CMD_SET_BREAK\n", __func__);
1651                         status = send_iosp_ext_cmd(edge_port,
1652                                                 IOSP_CMD_SET_BREAK, 0);
1653                 } else {
1654                         dev_dbg(&port->dev, "%s - Sending IOSP_CMD_CLEAR_BREAK\n", __func__);
1655                         status = send_iosp_ext_cmd(edge_port,
1656                                                 IOSP_CMD_CLEAR_BREAK, 0);
1657                 }
1658                 if (status)
1659                         dev_dbg(&port->dev, "%s - error sending break set/clear command.\n",
1660                                 __func__);
1661         }
1662 }
1663
1664
1665 /*****************************************************************************
1666  * process_rcvd_data
1667  *      this function handles the data received on the bulk in pipe.
1668  *****************************************************************************/
1669 static void process_rcvd_data(struct edgeport_serial *edge_serial,
1670                                 unsigned char *buffer, __u16 bufferLength)
1671 {
1672         struct device *dev = &edge_serial->serial->dev->dev;
1673         struct usb_serial_port *port;
1674         struct edgeport_port *edge_port;
1675         __u16 lastBufferLength;
1676         __u16 rxLen;
1677
1678         lastBufferLength = bufferLength + 1;
1679
1680         while (bufferLength > 0) {
1681                 /* failsafe incase we get a message that we don't understand */
1682                 if (lastBufferLength == bufferLength) {
1683                         dev_dbg(dev, "%s - stuck in loop, exiting it.\n", __func__);
1684                         break;
1685                 }
1686                 lastBufferLength = bufferLength;
1687
1688                 switch (edge_serial->rxState) {
1689                 case EXPECT_HDR1:
1690                         edge_serial->rxHeader1 = *buffer;
1691                         ++buffer;
1692                         --bufferLength;
1693
1694                         if (bufferLength == 0) {
1695                                 edge_serial->rxState = EXPECT_HDR2;
1696                                 break;
1697                         }
1698                         /* otherwise, drop on through */
1699                 case EXPECT_HDR2:
1700                         edge_serial->rxHeader2 = *buffer;
1701                         ++buffer;
1702                         --bufferLength;
1703
1704                         dev_dbg(dev, "%s - Hdr1=%02X Hdr2=%02X\n", __func__,
1705                                 edge_serial->rxHeader1, edge_serial->rxHeader2);
1706                         /* Process depending on whether this header is
1707                          * data or status */
1708
1709                         if (IS_CMD_STAT_HDR(edge_serial->rxHeader1)) {
1710                                 /* Decode this status header and go to
1711                                  * EXPECT_HDR1 (if we can process the status
1712                                  * with only 2 bytes), or go to EXPECT_HDR3 to
1713                                  * get the third byte. */
1714                                 edge_serial->rxPort =
1715                                     IOSP_GET_HDR_PORT(edge_serial->rxHeader1);
1716                                 edge_serial->rxStatusCode =
1717                                     IOSP_GET_STATUS_CODE(
1718                                                 edge_serial->rxHeader1);
1719
1720                                 if (!IOSP_STATUS_IS_2BYTE(
1721                                                 edge_serial->rxStatusCode)) {
1722                                         /* This status needs additional bytes.
1723                                          * Save what we have and then wait for
1724                                          * more data.
1725                                          */
1726                                         edge_serial->rxStatusParam
1727                                                 = edge_serial->rxHeader2;
1728                                         edge_serial->rxState = EXPECT_HDR3;
1729                                         break;
1730                                 }
1731                                 /* We have all the header bytes, process the
1732                                    status now */
1733                                 process_rcvd_status(edge_serial,
1734                                                 edge_serial->rxHeader2, 0);
1735                                 edge_serial->rxState = EXPECT_HDR1;
1736                                 break;
1737                         } else {
1738                                 edge_serial->rxPort =
1739                                     IOSP_GET_HDR_PORT(edge_serial->rxHeader1);
1740                                 edge_serial->rxBytesRemaining =
1741                                     IOSP_GET_HDR_DATA_LEN(
1742                                                 edge_serial->rxHeader1,
1743                                                 edge_serial->rxHeader2);
1744                                 dev_dbg(dev, "%s - Data for Port %u Len %u\n",
1745                                         __func__,
1746                                         edge_serial->rxPort,
1747                                         edge_serial->rxBytesRemaining);
1748
1749                                 /* ASSERT(DevExt->RxPort < DevExt->NumPorts);
1750                                  * ASSERT(DevExt->RxBytesRemaining <
1751                                  *              IOSP_MAX_DATA_LENGTH);
1752                                  */
1753
1754                                 if (bufferLength == 0) {
1755                                         edge_serial->rxState = EXPECT_DATA;
1756                                         break;
1757                                 }
1758                                 /* Else, drop through */
1759                         }
1760                 case EXPECT_DATA: /* Expect data */
1761                         if (bufferLength < edge_serial->rxBytesRemaining) {
1762                                 rxLen = bufferLength;
1763                                 /* Expect data to start next buffer */
1764                                 edge_serial->rxState = EXPECT_DATA;
1765                         } else {
1766                                 /* BufLen >= RxBytesRemaining */
1767                                 rxLen = edge_serial->rxBytesRemaining;
1768                                 /* Start another header next time */
1769                                 edge_serial->rxState = EXPECT_HDR1;
1770                         }
1771
1772                         bufferLength -= rxLen;
1773                         edge_serial->rxBytesRemaining -= rxLen;
1774
1775                         /* spit this data back into the tty driver if this
1776                            port is open */
1777                         if (rxLen) {
1778                                 port = edge_serial->serial->port[
1779                                                         edge_serial->rxPort];
1780                                 edge_port = usb_get_serial_port_data(port);
1781                                 if (edge_port->open) {
1782                                         dev_dbg(dev, "%s - Sending %d bytes to TTY for port %d\n",
1783                                                 __func__, rxLen,
1784                                                 edge_serial->rxPort);
1785                                         edge_tty_recv(edge_port->port, buffer,
1786                                                         rxLen);
1787                                         edge_port->port->icount.rx += rxLen;
1788                                 }
1789                                 buffer += rxLen;
1790                         }
1791                         break;
1792
1793                 case EXPECT_HDR3:       /* Expect 3rd byte of status header */
1794                         edge_serial->rxHeader3 = *buffer;
1795                         ++buffer;
1796                         --bufferLength;
1797
1798                         /* We have all the header bytes, process the
1799                            status now */
1800                         process_rcvd_status(edge_serial,
1801                                 edge_serial->rxStatusParam,
1802                                 edge_serial->rxHeader3);
1803                         edge_serial->rxState = EXPECT_HDR1;
1804                         break;
1805                 }
1806         }
1807 }
1808
1809
1810 /*****************************************************************************
1811  * process_rcvd_status
1812  *      this function handles the any status messages received on the
1813  *      bulk in pipe.
1814  *****************************************************************************/
1815 static void process_rcvd_status(struct edgeport_serial *edge_serial,
1816                                                 __u8 byte2, __u8 byte3)
1817 {
1818         struct usb_serial_port *port;
1819         struct edgeport_port *edge_port;
1820         struct tty_struct *tty;
1821         struct device *dev;
1822         __u8 code = edge_serial->rxStatusCode;
1823
1824         /* switch the port pointer to the one being currently talked about */
1825         port = edge_serial->serial->port[edge_serial->rxPort];
1826         edge_port = usb_get_serial_port_data(port);
1827         if (edge_port == NULL) {
1828                 dev_err(&edge_serial->serial->dev->dev,
1829                         "%s - edge_port == NULL for port %d\n",
1830                                         __func__, edge_serial->rxPort);
1831                 return;
1832         }
1833         dev = &port->dev;
1834
1835         if (code == IOSP_EXT_STATUS) {
1836                 switch (byte2) {
1837                 case IOSP_EXT_STATUS_CHASE_RSP:
1838                         /* we want to do EXT status regardless of port
1839                          * open/closed */
1840                         dev_dbg(dev, "%s - Port %u EXT CHASE_RSP Data = %02x\n",
1841                                 __func__, edge_serial->rxPort, byte3);
1842                         /* Currently, the only EXT_STATUS is Chase, so process
1843                          * here instead of one more call to one more subroutine
1844                          * If/when more EXT_STATUS, there'll be more work to do
1845                          * Also, we currently clear flag and close the port
1846                          * regardless of content of above's Byte3.
1847                          * We could choose to do something else when Byte3 says
1848                          * Timeout on Chase from Edgeport, like wait longer in
1849                          * block_until_chase_response, but for now we don't.
1850                          */
1851                         edge_port->chaseResponsePending = false;
1852                         wake_up(&edge_port->wait_chase);
1853                         return;
1854
1855                 case IOSP_EXT_STATUS_RX_CHECK_RSP:
1856                         dev_dbg(dev, "%s ========== Port %u CHECK_RSP Sequence = %02x =============\n",
1857                                 __func__, edge_serial->rxPort, byte3);
1858                         /* Port->RxCheckRsp = true; */
1859                         return;
1860                 }
1861         }
1862
1863         if (code == IOSP_STATUS_OPEN_RSP) {
1864                 edge_port->txCredits = GET_TX_BUFFER_SIZE(byte3);
1865                 edge_port->maxTxCredits = edge_port->txCredits;
1866                 dev_dbg(dev, "%s - Port %u Open Response Initial MSR = %02x TxBufferSize = %d\n",
1867                         __func__, edge_serial->rxPort, byte2, edge_port->txCredits);
1868                 handle_new_msr(edge_port, byte2);
1869
1870                 /* send the current line settings to the port so we are
1871                    in sync with any further termios calls */
1872                 tty = tty_port_tty_get(&edge_port->port->port);
1873                 if (tty) {
1874                         change_port_settings(tty,
1875                                 edge_port, &tty->termios);
1876                         tty_kref_put(tty);
1877                 }
1878
1879                 /* we have completed the open */
1880                 edge_port->openPending = false;
1881                 edge_port->open = true;
1882                 wake_up(&edge_port->wait_open);
1883                 return;
1884         }
1885
1886         /* If port is closed, silently discard all rcvd status. We can
1887          * have cases where buffered status is received AFTER the close
1888          * port command is sent to the Edgeport.
1889          */
1890         if (!edge_port->open || edge_port->closePending)
1891                 return;
1892
1893         switch (code) {
1894         /* Not currently sent by Edgeport */
1895         case IOSP_STATUS_LSR:
1896                 dev_dbg(dev, "%s - Port %u LSR Status = %02x\n",
1897                         __func__, edge_serial->rxPort, byte2);
1898                 handle_new_lsr(edge_port, false, byte2, 0);
1899                 break;
1900
1901         case IOSP_STATUS_LSR_DATA:
1902                 dev_dbg(dev, "%s - Port %u LSR Status = %02x, Data = %02x\n",
1903                         __func__, edge_serial->rxPort, byte2, byte3);
1904                 /* byte2 is LSR Register */
1905                 /* byte3 is broken data byte */
1906                 handle_new_lsr(edge_port, true, byte2, byte3);
1907                 break;
1908         /*
1909          *      case IOSP_EXT_4_STATUS:
1910          *              dev_dbg(dev, "%s - Port %u LSR Status = %02x Data = %02x\n",
1911          *                      __func__, edge_serial->rxPort, byte2, byte3);
1912          *              break;
1913          */
1914         case IOSP_STATUS_MSR:
1915                 dev_dbg(dev, "%s - Port %u MSR Status = %02x\n",
1916                         __func__, edge_serial->rxPort, byte2);
1917                 /*
1918                  * Process this new modem status and generate appropriate
1919                  * events, etc, based on the new status. This routine
1920                  * also saves the MSR in Port->ShadowMsr.
1921                  */
1922                 handle_new_msr(edge_port, byte2);
1923                 break;
1924
1925         default:
1926                 dev_dbg(dev, "%s - Unrecognized IOSP status code %u\n", __func__, code);
1927                 break;
1928         }
1929 }
1930
1931
1932 /*****************************************************************************
1933  * edge_tty_recv
1934  *      this function passes data on to the tty flip buffer
1935  *****************************************************************************/
1936 static void edge_tty_recv(struct usb_serial_port *port, unsigned char *data,
1937                 int length)
1938 {
1939         int cnt;
1940
1941         cnt = tty_insert_flip_string(&port->port, data, length);
1942         if (cnt < length) {
1943                 dev_err(&port->dev, "%s - dropping data, %d bytes lost\n",
1944                                 __func__, length - cnt);
1945         }
1946         data += cnt;
1947         length -= cnt;
1948
1949         tty_flip_buffer_push(&port->port);
1950 }
1951
1952
1953 /*****************************************************************************
1954  * handle_new_msr
1955  *      this function handles any change to the msr register for a port.
1956  *****************************************************************************/
1957 static void handle_new_msr(struct edgeport_port *edge_port, __u8 newMsr)
1958 {
1959         struct  async_icount *icount;
1960
1961         if (newMsr & (EDGEPORT_MSR_DELTA_CTS | EDGEPORT_MSR_DELTA_DSR |
1962                         EDGEPORT_MSR_DELTA_RI | EDGEPORT_MSR_DELTA_CD)) {
1963                 icount = &edge_port->port->icount;
1964
1965                 /* update input line counters */
1966                 if (newMsr & EDGEPORT_MSR_DELTA_CTS)
1967                         icount->cts++;
1968                 if (newMsr & EDGEPORT_MSR_DELTA_DSR)
1969                         icount->dsr++;
1970                 if (newMsr & EDGEPORT_MSR_DELTA_CD)
1971                         icount->dcd++;
1972                 if (newMsr & EDGEPORT_MSR_DELTA_RI)
1973                         icount->rng++;
1974                 wake_up_interruptible(&edge_port->port->port.delta_msr_wait);
1975         }
1976
1977         /* Save the new modem status */
1978         edge_port->shadowMSR = newMsr & 0xf0;
1979 }
1980
1981
1982 /*****************************************************************************
1983  * handle_new_lsr
1984  *      this function handles any change to the lsr register for a port.
1985  *****************************************************************************/
1986 static void handle_new_lsr(struct edgeport_port *edge_port, __u8 lsrData,
1987                                                         __u8 lsr, __u8 data)
1988 {
1989         __u8 newLsr = (__u8) (lsr & (__u8)
1990                 (LSR_OVER_ERR | LSR_PAR_ERR | LSR_FRM_ERR | LSR_BREAK));
1991         struct async_icount *icount;
1992
1993         edge_port->shadowLSR = lsr;
1994
1995         if (newLsr & LSR_BREAK) {
1996                 /*
1997                  * Parity and Framing errors only count if they
1998                  * occur exclusive of a break being
1999                  * received.
2000                  */
2001                 newLsr &= (__u8)(LSR_OVER_ERR | LSR_BREAK);
2002         }
2003
2004         /* Place LSR data byte into Rx buffer */
2005         if (lsrData)
2006                 edge_tty_recv(edge_port->port, &data, 1);
2007
2008         /* update input line counters */
2009         icount = &edge_port->port->icount;
2010         if (newLsr & LSR_BREAK)
2011                 icount->brk++;
2012         if (newLsr & LSR_OVER_ERR)
2013                 icount->overrun++;
2014         if (newLsr & LSR_PAR_ERR)
2015                 icount->parity++;
2016         if (newLsr & LSR_FRM_ERR)
2017                 icount->frame++;
2018 }
2019
2020
2021 /****************************************************************************
2022  * sram_write
2023  *      writes a number of bytes to the Edgeport device's sram starting at the
2024  *      given address.
2025  *      If successful returns the number of bytes written, otherwise it returns
2026  *      a negative error number of the problem.
2027  ****************************************************************************/
2028 static int sram_write(struct usb_serial *serial, __u16 extAddr, __u16 addr,
2029                                         __u16 length, const __u8 *data)
2030 {
2031         int result;
2032         __u16 current_length;
2033         unsigned char *transfer_buffer;
2034
2035         dev_dbg(&serial->dev->dev, "%s - %x, %x, %d\n", __func__, extAddr, addr, length);
2036
2037         transfer_buffer =  kmalloc(64, GFP_KERNEL);
2038         if (!transfer_buffer) {
2039                 dev_err(&serial->dev->dev, "%s - kmalloc(%d) failed.\n",
2040                                                         __func__, 64);
2041                 return -ENOMEM;
2042         }
2043
2044         /* need to split these writes up into 64 byte chunks */
2045         result = 0;
2046         while (length > 0) {
2047                 if (length > 64)
2048                         current_length = 64;
2049                 else
2050                         current_length = length;
2051
2052 /*              dev_dbg(&serial->dev->dev, "%s - writing %x, %x, %d\n", __func__, extAddr, addr, current_length); */
2053                 memcpy(transfer_buffer, data, current_length);
2054                 result = usb_control_msg(serial->dev,
2055                                         usb_sndctrlpipe(serial->dev, 0),
2056                                         USB_REQUEST_ION_WRITE_RAM,
2057                                         0x40, addr, extAddr, transfer_buffer,
2058                                         current_length, 300);
2059                 if (result < 0)
2060                         break;
2061                 length -= current_length;
2062                 addr += current_length;
2063                 data += current_length;
2064         }
2065
2066         kfree(transfer_buffer);
2067         return result;
2068 }
2069
2070
2071 /****************************************************************************
2072  * rom_write
2073  *      writes a number of bytes to the Edgeport device's ROM starting at the
2074  *      given address.
2075  *      If successful returns the number of bytes written, otherwise it returns
2076  *      a negative error number of the problem.
2077  ****************************************************************************/
2078 static int rom_write(struct usb_serial *serial, __u16 extAddr, __u16 addr,
2079                                         __u16 length, const __u8 *data)
2080 {
2081         int result;
2082         __u16 current_length;
2083         unsigned char *transfer_buffer;
2084
2085         transfer_buffer =  kmalloc(64, GFP_KERNEL);
2086         if (!transfer_buffer) {
2087                 dev_err(&serial->dev->dev, "%s - kmalloc(%d) failed.\n",
2088                                                                 __func__, 64);
2089                 return -ENOMEM;
2090         }
2091
2092         /* need to split these writes up into 64 byte chunks */
2093         result = 0;
2094         while (length > 0) {
2095                 if (length > 64)
2096                         current_length = 64;
2097                 else
2098                         current_length = length;
2099                 memcpy(transfer_buffer, data, current_length);
2100                 result = usb_control_msg(serial->dev,
2101                                         usb_sndctrlpipe(serial->dev, 0),
2102                                         USB_REQUEST_ION_WRITE_ROM, 0x40,
2103                                         addr, extAddr,
2104                                         transfer_buffer, current_length, 300);
2105                 if (result < 0)
2106                         break;
2107                 length -= current_length;
2108                 addr += current_length;
2109                 data += current_length;
2110         }
2111
2112         kfree(transfer_buffer);
2113         return result;
2114 }
2115
2116
2117 /****************************************************************************
2118  * rom_read
2119  *      reads a number of bytes from the Edgeport device starting at the given
2120  *      address.
2121  *      If successful returns the number of bytes read, otherwise it returns
2122  *      a negative error number of the problem.
2123  ****************************************************************************/
2124 static int rom_read(struct usb_serial *serial, __u16 extAddr,
2125                                         __u16 addr, __u16 length, __u8 *data)
2126 {
2127         int result;
2128         __u16 current_length;
2129         unsigned char *transfer_buffer;
2130
2131         transfer_buffer =  kmalloc(64, GFP_KERNEL);
2132         if (!transfer_buffer) {
2133                 dev_err(&serial->dev->dev,
2134                         "%s - kmalloc(%d) failed.\n", __func__, 64);
2135                 return -ENOMEM;
2136         }
2137
2138         /* need to split these reads up into 64 byte chunks */
2139         result = 0;
2140         while (length > 0) {
2141                 if (length > 64)
2142                         current_length = 64;
2143                 else
2144                         current_length = length;
2145                 result = usb_control_msg(serial->dev,
2146                                         usb_rcvctrlpipe(serial->dev, 0),
2147                                         USB_REQUEST_ION_READ_ROM,
2148                                         0xC0, addr, extAddr, transfer_buffer,
2149                                         current_length, 300);
2150                 if (result < 0)
2151                         break;
2152                 memcpy(data, transfer_buffer, current_length);
2153                 length -= current_length;
2154                 addr += current_length;
2155                 data += current_length;
2156         }
2157
2158         kfree(transfer_buffer);
2159         return result;
2160 }
2161
2162
2163 /****************************************************************************
2164  * send_iosp_ext_cmd
2165  *      Is used to send a IOSP message to the Edgeport device
2166  ****************************************************************************/
2167 static int send_iosp_ext_cmd(struct edgeport_port *edge_port,
2168                                                 __u8 command, __u8 param)
2169 {
2170         unsigned char   *buffer;
2171         unsigned char   *currentCommand;
2172         int             length = 0;
2173         int             status = 0;
2174
2175         buffer = kmalloc(10, GFP_ATOMIC);
2176         if (!buffer) {
2177                 dev_err(&edge_port->port->dev,
2178                                 "%s - kmalloc(%d) failed.\n", __func__, 10);
2179                 return -ENOMEM;
2180         }
2181
2182         currentCommand = buffer;
2183
2184         MAKE_CMD_EXT_CMD(&currentCommand, &length,
2185                 edge_port->port->number - edge_port->port->serial->minor,
2186                 command, param);
2187
2188         status = write_cmd_usb(edge_port, buffer, length);
2189         if (status) {
2190                 /* something bad happened, let's free up the memory */
2191                 kfree(buffer);
2192         }
2193
2194         return status;
2195 }
2196
2197
2198 /*****************************************************************************
2199  * write_cmd_usb
2200  *      this function writes the given buffer out to the bulk write endpoint.
2201  *****************************************************************************/
2202 static int write_cmd_usb(struct edgeport_port *edge_port,
2203                                         unsigned char *buffer, int length)
2204 {
2205         struct edgeport_serial *edge_serial =
2206                                 usb_get_serial_data(edge_port->port->serial);
2207         struct device *dev = &edge_port->port->dev;
2208         int status = 0;
2209         struct urb *urb;
2210
2211         usb_serial_debug_data(dev, __func__, length, buffer);
2212
2213         /* Allocate our next urb */
2214         urb = usb_alloc_urb(0, GFP_ATOMIC);
2215         if (!urb)
2216                 return -ENOMEM;
2217
2218         atomic_inc(&CmdUrbs);
2219         dev_dbg(dev, "%s - ALLOCATE URB %p (outstanding %d)\n",
2220                 __func__, urb, atomic_read(&CmdUrbs));
2221
2222         usb_fill_bulk_urb(urb, edge_serial->serial->dev,
2223                         usb_sndbulkpipe(edge_serial->serial->dev,
2224                                         edge_serial->bulk_out_endpoint),
2225                         buffer, length, edge_bulk_out_cmd_callback, edge_port);
2226
2227         edge_port->commandPending = true;
2228         status = usb_submit_urb(urb, GFP_ATOMIC);
2229
2230         if (status) {
2231                 /* something went wrong */
2232                 dev_err(dev, "%s - usb_submit_urb(write command) failed, status = %d\n",
2233                         __func__, status);
2234                 usb_kill_urb(urb);
2235                 usb_free_urb(urb);
2236                 atomic_dec(&CmdUrbs);
2237                 return status;
2238         }
2239
2240 #if 0
2241         wait_event(&edge_port->wait_command, !edge_port->commandPending);
2242
2243         if (edge_port->commandPending) {
2244                 /* command timed out */
2245                 dev_dbg(dev, "%s - command timed out\n", __func__);
2246                 status = -EINVAL;
2247         }
2248 #endif
2249         return status;
2250 }
2251
2252
2253 /*****************************************************************************
2254  * send_cmd_write_baud_rate
2255  *      this function sends the proper command to change the baud rate of the
2256  *      specified port.
2257  *****************************************************************************/
2258 static int send_cmd_write_baud_rate(struct edgeport_port *edge_port,
2259                                                                 int baudRate)
2260 {
2261         struct edgeport_serial *edge_serial =
2262                                 usb_get_serial_data(edge_port->port->serial);
2263         struct device *dev = &edge_port->port->dev;
2264         unsigned char *cmdBuffer;
2265         unsigned char *currCmd;
2266         int cmdLen = 0;
2267         int divisor;
2268         int status;
2269         unsigned char number =
2270                 edge_port->port->number - edge_port->port->serial->minor;
2271
2272         if (edge_serial->is_epic &&
2273             !edge_serial->epic_descriptor.Supports.IOSPSetBaudRate) {
2274                 dev_dbg(dev, "SendCmdWriteBaudRate - NOT Setting baud rate for port = %d, baud = %d\n",
2275                         edge_port->port->number, baudRate);
2276                 return 0;
2277         }
2278
2279         dev_dbg(dev, "%s - port = %d, baud = %d\n", __func__,
2280                 edge_port->port->number, baudRate);
2281
2282         status = calc_baud_rate_divisor(dev, baudRate, &divisor);
2283         if (status) {
2284                 dev_err(dev, "%s - bad baud rate\n", __func__);
2285                 return status;
2286         }
2287
2288         /* Alloc memory for the string of commands. */
2289         cmdBuffer =  kmalloc(0x100, GFP_ATOMIC);
2290         if (!cmdBuffer) {
2291                 dev_err(dev, "%s - kmalloc(%d) failed.\n", __func__, 0x100);
2292                 return -ENOMEM;
2293         }
2294         currCmd = cmdBuffer;
2295
2296         /* Enable access to divisor latch */
2297         MAKE_CMD_WRITE_REG(&currCmd, &cmdLen, number, LCR, LCR_DL_ENABLE);
2298
2299         /* Write the divisor itself */
2300         MAKE_CMD_WRITE_REG(&currCmd, &cmdLen, number, DLL, LOW8(divisor));
2301         MAKE_CMD_WRITE_REG(&currCmd, &cmdLen, number, DLM, HIGH8(divisor));
2302
2303         /* Restore original value to disable access to divisor latch */
2304         MAKE_CMD_WRITE_REG(&currCmd, &cmdLen, number, LCR,
2305                                                 edge_port->shadowLCR);
2306
2307         status = write_cmd_usb(edge_port, cmdBuffer, cmdLen);
2308         if (status) {
2309                 /* something bad happened, let's free up the memory */
2310                 kfree(cmdBuffer);
2311         }
2312
2313         return status;
2314 }
2315
2316
2317 /*****************************************************************************
2318  * calc_baud_rate_divisor
2319  *      this function calculates the proper baud rate divisor for the specified
2320  *      baud rate.
2321  *****************************************************************************/
2322 static int calc_baud_rate_divisor(struct device *dev, int baudrate, int *divisor)
2323 {
2324         int i;
2325         __u16 custom;
2326
2327         for (i = 0; i < ARRAY_SIZE(divisor_table); i++) {
2328                 if (divisor_table[i].BaudRate == baudrate) {
2329                         *divisor = divisor_table[i].Divisor;
2330                         return 0;
2331                 }
2332         }
2333
2334         /* We have tried all of the standard baud rates
2335          * lets try to calculate the divisor for this baud rate
2336          * Make sure the baud rate is reasonable */
2337         if (baudrate > 50 && baudrate < 230400) {
2338                 /* get divisor */
2339                 custom = (__u16)((230400L + baudrate/2) / baudrate);
2340
2341                 *divisor = custom;
2342
2343                 dev_dbg(dev, "%s - Baud %d = %d\n", __func__, baudrate, custom);
2344                 return 0;
2345         }
2346
2347         return -1;
2348 }
2349
2350
2351 /*****************************************************************************
2352  * send_cmd_write_uart_register
2353  *  this function builds up a uart register message and sends to the device.
2354  *****************************************************************************/
2355 static int send_cmd_write_uart_register(struct edgeport_port *edge_port,
2356                                                 __u8 regNum, __u8 regValue)
2357 {
2358         struct edgeport_serial *edge_serial =
2359                                 usb_get_serial_data(edge_port->port->serial);
2360         struct device *dev = &edge_port->port->dev;
2361         unsigned char *cmdBuffer;
2362         unsigned char *currCmd;
2363         unsigned long cmdLen = 0;
2364         int status;
2365
2366         dev_dbg(dev, "%s - write to %s register 0x%02x\n",
2367                 (regNum == MCR) ? "MCR" : "LCR", __func__, regValue);
2368
2369         if (edge_serial->is_epic &&
2370             !edge_serial->epic_descriptor.Supports.IOSPWriteMCR &&
2371             regNum == MCR) {
2372                 dev_dbg(dev, "SendCmdWriteUartReg - Not writing to MCR Register\n");
2373                 return 0;
2374         }
2375
2376         if (edge_serial->is_epic &&
2377             !edge_serial->epic_descriptor.Supports.IOSPWriteLCR &&
2378             regNum == LCR) {
2379                 dev_dbg(dev, "SendCmdWriteUartReg - Not writing to LCR Register\n");
2380                 return 0;
2381         }
2382
2383         /* Alloc memory for the string of commands. */
2384         cmdBuffer = kmalloc(0x10, GFP_ATOMIC);
2385         if (cmdBuffer == NULL)
2386                 return -ENOMEM;
2387
2388         currCmd = cmdBuffer;
2389
2390         /* Build a cmd in the buffer to write the given register */
2391         MAKE_CMD_WRITE_REG(&currCmd, &cmdLen,
2392                 edge_port->port->number - edge_port->port->serial->minor,
2393                 regNum, regValue);
2394
2395         status = write_cmd_usb(edge_port, cmdBuffer, cmdLen);
2396         if (status) {
2397                 /* something bad happened, let's free up the memory */
2398                 kfree(cmdBuffer);
2399         }
2400
2401         return status;
2402 }
2403
2404
2405 /*****************************************************************************
2406  * change_port_settings
2407  *      This routine is called to set the UART on the device to match the
2408  *      specified new settings.
2409  *****************************************************************************/
2410
2411 static void change_port_settings(struct tty_struct *tty,
2412         struct edgeport_port *edge_port, struct ktermios *old_termios)
2413 {
2414         struct device *dev = &edge_port->port->dev;
2415         struct edgeport_serial *edge_serial =
2416                         usb_get_serial_data(edge_port->port->serial);
2417         int baud;
2418         unsigned cflag;
2419         __u8 mask = 0xff;
2420         __u8 lData;
2421         __u8 lParity;
2422         __u8 lStop;
2423         __u8 rxFlow;
2424         __u8 txFlow;
2425         int status;
2426
2427         dev_dbg(dev, "%s - port %d\n", __func__, edge_port->port->number);
2428
2429         if (!edge_port->open &&
2430             !edge_port->openPending) {
2431                 dev_dbg(dev, "%s - port not opened\n", __func__);
2432                 return;
2433         }
2434
2435         cflag = tty->termios.c_cflag;
2436
2437         switch (cflag & CSIZE) {
2438         case CS5:
2439                 lData = LCR_BITS_5; mask = 0x1f;
2440                 dev_dbg(dev, "%s - data bits = 5\n", __func__);
2441                 break;
2442         case CS6:
2443                 lData = LCR_BITS_6; mask = 0x3f;
2444                 dev_dbg(dev, "%s - data bits = 6\n", __func__);
2445                 break;
2446         case CS7:
2447                 lData = LCR_BITS_7; mask = 0x7f;
2448                 dev_dbg(dev, "%s - data bits = 7\n", __func__);
2449                 break;
2450         default:
2451         case CS8:
2452                 lData = LCR_BITS_8;
2453                 dev_dbg(dev, "%s - data bits = 8\n", __func__);
2454                 break;
2455         }
2456
2457         lParity = LCR_PAR_NONE;
2458         if (cflag & PARENB) {
2459                 if (cflag & CMSPAR) {
2460                         if (cflag & PARODD) {
2461                                 lParity = LCR_PAR_MARK;
2462                                 dev_dbg(dev, "%s - parity = mark\n", __func__);
2463                         } else {
2464                                 lParity = LCR_PAR_SPACE;
2465                                 dev_dbg(dev, "%s - parity = space\n", __func__);
2466                         }
2467                 } else if (cflag & PARODD) {
2468                         lParity = LCR_PAR_ODD;
2469                         dev_dbg(dev, "%s - parity = odd\n", __func__);
2470                 } else {
2471                         lParity = LCR_PAR_EVEN;
2472                         dev_dbg(dev, "%s - parity = even\n", __func__);
2473                 }
2474         } else {
2475                 dev_dbg(dev, "%s - parity = none\n", __func__);
2476         }
2477
2478         if (cflag & CSTOPB) {
2479                 lStop = LCR_STOP_2;
2480                 dev_dbg(dev, "%s - stop bits = 2\n", __func__);
2481         } else {
2482                 lStop = LCR_STOP_1;
2483                 dev_dbg(dev, "%s - stop bits = 1\n", __func__);
2484         }
2485
2486         /* figure out the flow control settings */
2487         rxFlow = txFlow = 0x00;
2488         if (cflag & CRTSCTS) {
2489                 rxFlow |= IOSP_RX_FLOW_RTS;
2490                 txFlow |= IOSP_TX_FLOW_CTS;
2491                 dev_dbg(dev, "%s - RTS/CTS is enabled\n", __func__);
2492         } else {
2493                 dev_dbg(dev, "%s - RTS/CTS is disabled\n", __func__);
2494         }
2495
2496         /* if we are implementing XON/XOFF, set the start and stop character
2497            in the device */
2498         if (I_IXOFF(tty) || I_IXON(tty)) {
2499                 unsigned char stop_char  = STOP_CHAR(tty);
2500                 unsigned char start_char = START_CHAR(tty);
2501
2502                 if ((!edge_serial->is_epic) ||
2503                     ((edge_serial->is_epic) &&
2504                      (edge_serial->epic_descriptor.Supports.IOSPSetXChar))) {
2505                         send_iosp_ext_cmd(edge_port,
2506                                         IOSP_CMD_SET_XON_CHAR, start_char);
2507                         send_iosp_ext_cmd(edge_port,
2508                                         IOSP_CMD_SET_XOFF_CHAR, stop_char);
2509                 }
2510
2511                 /* if we are implementing INBOUND XON/XOFF */
2512                 if (I_IXOFF(tty)) {
2513                         rxFlow |= IOSP_RX_FLOW_XON_XOFF;
2514                         dev_dbg(dev, "%s - INBOUND XON/XOFF is enabled, XON = %2x, XOFF = %2x\n",
2515                                 __func__, start_char, stop_char);
2516                 } else {
2517                         dev_dbg(dev, "%s - INBOUND XON/XOFF is disabled\n", __func__);
2518                 }
2519
2520                 /* if we are implementing OUTBOUND XON/XOFF */
2521                 if (I_IXON(tty)) {
2522                         txFlow |= IOSP_TX_FLOW_XON_XOFF;
2523                         dev_dbg(dev, "%s - OUTBOUND XON/XOFF is enabled, XON = %2x, XOFF = %2x\n",
2524                                 __func__, start_char, stop_char);
2525                 } else {
2526                         dev_dbg(dev, "%s - OUTBOUND XON/XOFF is disabled\n", __func__);
2527                 }
2528         }
2529
2530         /* Set flow control to the configured value */
2531         if ((!edge_serial->is_epic) ||
2532             ((edge_serial->is_epic) &&
2533              (edge_serial->epic_descriptor.Supports.IOSPSetRxFlow)))
2534                 send_iosp_ext_cmd(edge_port, IOSP_CMD_SET_RX_FLOW, rxFlow);
2535         if ((!edge_serial->is_epic) ||
2536             ((edge_serial->is_epic) &&
2537              (edge_serial->epic_descriptor.Supports.IOSPSetTxFlow)))
2538                 send_iosp_ext_cmd(edge_port, IOSP_CMD_SET_TX_FLOW, txFlow);
2539
2540
2541         edge_port->shadowLCR &= ~(LCR_BITS_MASK | LCR_STOP_MASK | LCR_PAR_MASK);
2542         edge_port->shadowLCR |= (lData | lParity | lStop);
2543
2544         edge_port->validDataMask = mask;
2545
2546         /* Send the updated LCR value to the EdgePort */
2547         status = send_cmd_write_uart_register(edge_port, LCR,
2548                                                         edge_port->shadowLCR);
2549         if (status != 0)
2550                 return;
2551
2552         /* set up the MCR register and send it to the EdgePort */
2553         edge_port->shadowMCR = MCR_MASTER_IE;
2554         if (cflag & CBAUD)
2555                 edge_port->shadowMCR |= (MCR_DTR | MCR_RTS);
2556
2557         status = send_cmd_write_uart_register(edge_port, MCR,
2558                                                 edge_port->shadowMCR);
2559         if (status != 0)
2560                 return;
2561
2562         /* Determine divisor based on baud rate */
2563         baud = tty_get_baud_rate(tty);
2564         if (!baud) {
2565                 /* pick a default, any default... */
2566                 baud = 9600;
2567         }
2568
2569         dev_dbg(dev, "%s - baud rate = %d\n", __func__, baud);
2570         status = send_cmd_write_baud_rate(edge_port, baud);
2571         if (status == -1) {
2572                 /* Speed change was not possible - put back the old speed */
2573                 baud = tty_termios_baud_rate(old_termios);
2574                 tty_encode_baud_rate(tty, baud, baud);
2575         }
2576 }
2577
2578
2579 /****************************************************************************
2580  * unicode_to_ascii
2581  *      Turns a string from Unicode into ASCII.
2582  *      Doesn't do a good job with any characters that are outside the normal
2583  *      ASCII range, but it's only for debugging...
2584  *      NOTE: expects the unicode in LE format
2585  ****************************************************************************/
2586 static void unicode_to_ascii(char *string, int buflen,
2587                                         __le16 *unicode, int unicode_size)
2588 {
2589         int i;
2590
2591         if (buflen <= 0)        /* never happens, but... */
2592                 return;
2593         --buflen;               /* space for nul */
2594
2595         for (i = 0; i < unicode_size; i++) {
2596                 if (i >= buflen)
2597                         break;
2598                 string[i] = (char)(le16_to_cpu(unicode[i]));
2599         }
2600         string[i] = 0x00;
2601 }
2602
2603
2604 /****************************************************************************
2605  * get_manufacturing_desc
2606  *      reads in the manufacturing descriptor and stores it into the serial
2607  *      structure.
2608  ****************************************************************************/
2609 static void get_manufacturing_desc(struct edgeport_serial *edge_serial)
2610 {
2611         struct device *dev = &edge_serial->serial->dev->dev;
2612         int response;
2613
2614         dev_dbg(dev, "getting manufacturer descriptor\n");
2615
2616         response = rom_read(edge_serial->serial,
2617                                 (EDGE_MANUF_DESC_ADDR & 0xffff0000) >> 16,
2618                                 (__u16)(EDGE_MANUF_DESC_ADDR & 0x0000ffff),
2619                                 EDGE_MANUF_DESC_LEN,
2620                                 (__u8 *)(&edge_serial->manuf_descriptor));
2621
2622         if (response < 1)
2623                 dev_err(dev, "error in getting manufacturer descriptor\n");
2624         else {
2625                 char string[30];
2626                 dev_dbg(dev, "**Manufacturer Descriptor\n");
2627                 dev_dbg(dev, "  RomSize:        %dK\n",
2628                         edge_serial->manuf_descriptor.RomSize);
2629                 dev_dbg(dev, "  RamSize:        %dK\n",
2630                         edge_serial->manuf_descriptor.RamSize);
2631                 dev_dbg(dev, "  CpuRev:         %d\n",
2632                         edge_serial->manuf_descriptor.CpuRev);
2633                 dev_dbg(dev, "  BoardRev:       %d\n",
2634                         edge_serial->manuf_descriptor.BoardRev);
2635                 dev_dbg(dev, "  NumPorts:       %d\n",
2636                         edge_serial->manuf_descriptor.NumPorts);
2637                 dev_dbg(dev, "  DescDate:       %d/%d/%d\n",
2638                         edge_serial->manuf_descriptor.DescDate[0],
2639                         edge_serial->manuf_descriptor.DescDate[1],
2640                         edge_serial->manuf_descriptor.DescDate[2]+1900);
2641                 unicode_to_ascii(string, sizeof(string),
2642                         edge_serial->manuf_descriptor.SerialNumber,
2643                         edge_serial->manuf_descriptor.SerNumLength/2);
2644                 dev_dbg(dev, "  SerialNumber: %s\n", string);
2645                 unicode_to_ascii(string, sizeof(string),
2646                         edge_serial->manuf_descriptor.AssemblyNumber,
2647                         edge_serial->manuf_descriptor.AssemblyNumLength/2);
2648                 dev_dbg(dev, "  AssemblyNumber: %s\n", string);
2649                 unicode_to_ascii(string, sizeof(string),
2650                     edge_serial->manuf_descriptor.OemAssyNumber,
2651                     edge_serial->manuf_descriptor.OemAssyNumLength/2);
2652                 dev_dbg(dev, "  OemAssyNumber:  %s\n", string);
2653                 dev_dbg(dev, "  UartType:       %d\n",
2654                         edge_serial->manuf_descriptor.UartType);
2655                 dev_dbg(dev, "  IonPid:         %d\n",
2656                         edge_serial->manuf_descriptor.IonPid);
2657                 dev_dbg(dev, "  IonConfig:      %d\n",
2658                         edge_serial->manuf_descriptor.IonConfig);
2659         }
2660 }
2661
2662
2663 /****************************************************************************
2664  * get_boot_desc
2665  *      reads in the bootloader descriptor and stores it into the serial
2666  *      structure.
2667  ****************************************************************************/
2668 static void get_boot_desc(struct edgeport_serial *edge_serial)
2669 {
2670         struct device *dev = &edge_serial->serial->dev->dev;
2671         int response;
2672
2673         dev_dbg(dev, "getting boot descriptor\n");
2674
2675         response = rom_read(edge_serial->serial,
2676                                 (EDGE_BOOT_DESC_ADDR & 0xffff0000) >> 16,
2677                                 (__u16)(EDGE_BOOT_DESC_ADDR & 0x0000ffff),
2678                                 EDGE_BOOT_DESC_LEN,
2679                                 (__u8 *)(&edge_serial->boot_descriptor));
2680
2681         if (response < 1)
2682                 dev_err(dev, "error in getting boot descriptor\n");
2683         else {
2684                 dev_dbg(dev, "**Boot Descriptor:\n");
2685                 dev_dbg(dev, "  BootCodeLength: %d\n",
2686                         le16_to_cpu(edge_serial->boot_descriptor.BootCodeLength));
2687                 dev_dbg(dev, "  MajorVersion:   %d\n",
2688                         edge_serial->boot_descriptor.MajorVersion);
2689                 dev_dbg(dev, "  MinorVersion:   %d\n",
2690                         edge_serial->boot_descriptor.MinorVersion);
2691                 dev_dbg(dev, "  BuildNumber:    %d\n",
2692                         le16_to_cpu(edge_serial->boot_descriptor.BuildNumber));
2693                 dev_dbg(dev, "  Capabilities:   0x%x\n",
2694                       le16_to_cpu(edge_serial->boot_descriptor.Capabilities));
2695                 dev_dbg(dev, "  UConfig0:       %d\n",
2696                         edge_serial->boot_descriptor.UConfig0);
2697                 dev_dbg(dev, "  UConfig1:       %d\n",
2698                         edge_serial->boot_descriptor.UConfig1);
2699         }
2700 }
2701
2702
2703 /****************************************************************************
2704  * load_application_firmware
2705  *      This is called to load the application firmware to the device
2706  ****************************************************************************/
2707 static void load_application_firmware(struct edgeport_serial *edge_serial)
2708 {
2709         struct device *dev = &edge_serial->serial->dev->dev;
2710         const struct ihex_binrec *rec;
2711         const struct firmware *fw;
2712         const char *fw_name;
2713         const char *fw_info;
2714         int response;
2715         __u32 Operaddr;
2716         __u16 build;
2717
2718         switch (edge_serial->product_info.iDownloadFile) {
2719                 case EDGE_DOWNLOAD_FILE_I930:
2720                         fw_info = "downloading firmware version (930)";
2721                         fw_name = "edgeport/down.fw";
2722                         break;
2723
2724                 case EDGE_DOWNLOAD_FILE_80251:
2725                         fw_info = "downloading firmware version (80251)";
2726                         fw_name = "edgeport/down2.fw";
2727                         break;
2728
2729                 case EDGE_DOWNLOAD_FILE_NONE:
2730                         dev_dbg(dev, "No download file specified, skipping download\n");
2731                         return;
2732
2733                 default:
2734                         return;
2735         }
2736
2737         response = request_ihex_firmware(&fw, fw_name,
2738                                     &edge_serial->serial->dev->dev);
2739         if (response) {
2740                 dev_err(dev, "Failed to load image \"%s\" err %d\n",
2741                        fw_name, response);
2742                 return;
2743         }
2744
2745         rec = (const struct ihex_binrec *)fw->data;
2746         build = (rec->data[2] << 8) | rec->data[3];
2747
2748         dev_dbg(dev, "%s %d.%d.%d\n", fw_info, rec->data[0], rec->data[1], build);
2749
2750         edge_serial->product_info.FirmwareMajorVersion = rec->data[0];
2751         edge_serial->product_info.FirmwareMinorVersion = rec->data[1];
2752         edge_serial->product_info.FirmwareBuildNumber = cpu_to_le16(build);
2753
2754         for (rec = ihex_next_binrec(rec); rec;
2755              rec = ihex_next_binrec(rec)) {
2756                 Operaddr = be32_to_cpu(rec->addr);
2757                 response = sram_write(edge_serial->serial,
2758                                      Operaddr >> 16,
2759                                      Operaddr & 0xFFFF,
2760                                      be16_to_cpu(rec->len),
2761                                      &rec->data[0]);
2762                 if (response < 0) {
2763                         dev_err(&edge_serial->serial->dev->dev,
2764                                 "sram_write failed (%x, %x, %d)\n",
2765                                 Operaddr >> 16, Operaddr & 0xFFFF,
2766                                 be16_to_cpu(rec->len));
2767                         break;
2768                 }
2769         }
2770
2771         dev_dbg(dev, "sending exec_dl_code\n");
2772         response = usb_control_msg (edge_serial->serial->dev,
2773                                     usb_sndctrlpipe(edge_serial->serial->dev, 0),
2774                                     USB_REQUEST_ION_EXEC_DL_CODE,
2775                                     0x40, 0x4000, 0x0001, NULL, 0, 3000);
2776
2777         release_firmware(fw);
2778 }
2779
2780
2781 /****************************************************************************
2782  * edge_startup
2783  ****************************************************************************/
2784 static int edge_startup(struct usb_serial *serial)
2785 {
2786         struct edgeport_serial *edge_serial;
2787         struct usb_device *dev;
2788         struct device *ddev = &serial->dev->dev;
2789         int i;
2790         int response;
2791         bool interrupt_in_found;
2792         bool bulk_in_found;
2793         bool bulk_out_found;
2794         static __u32 descriptor[3] = {  EDGE_COMPATIBILITY_MASK0,
2795                                         EDGE_COMPATIBILITY_MASK1,
2796                                         EDGE_COMPATIBILITY_MASK2 };
2797
2798         dev = serial->dev;
2799
2800         /* create our private serial structure */
2801         edge_serial = kzalloc(sizeof(struct edgeport_serial), GFP_KERNEL);
2802         if (edge_serial == NULL) {
2803                 dev_err(&serial->dev->dev, "%s - Out of memory\n", __func__);
2804                 return -ENOMEM;
2805         }
2806         spin_lock_init(&edge_serial->es_lock);
2807         edge_serial->serial = serial;
2808         usb_set_serial_data(serial, edge_serial);
2809
2810         /* get the name for the device from the device */
2811         i = usb_string(dev, dev->descriptor.iManufacturer,
2812             &edge_serial->name[0], MAX_NAME_LEN+1);
2813         if (i < 0)
2814                 i = 0;
2815         edge_serial->name[i++] = ' ';
2816         usb_string(dev, dev->descriptor.iProduct,
2817             &edge_serial->name[i], MAX_NAME_LEN+2 - i);
2818
2819         dev_info(&serial->dev->dev, "%s detected\n", edge_serial->name);
2820
2821         /* Read the epic descriptor */
2822         if (get_epic_descriptor(edge_serial) <= 0) {
2823                 /* memcpy descriptor to Supports structures */
2824                 memcpy(&edge_serial->epic_descriptor.Supports, descriptor,
2825                        sizeof(struct edge_compatibility_bits));
2826
2827                 /* get the manufacturing descriptor for this device */
2828                 get_manufacturing_desc(edge_serial);
2829
2830                 /* get the boot descriptor */
2831                 get_boot_desc(edge_serial);
2832
2833                 get_product_info(edge_serial);
2834         }
2835
2836         /* set the number of ports from the manufacturing description */
2837         /* serial->num_ports = serial->product_info.NumPorts; */
2838         if ((!edge_serial->is_epic) &&
2839             (edge_serial->product_info.NumPorts != serial->num_ports)) {
2840                 dev_warn(ddev,
2841                         "Device Reported %d serial ports vs. core thinking we have %d ports, email greg@kroah.com this information.\n",
2842                          edge_serial->product_info.NumPorts,
2843                          serial->num_ports);
2844         }
2845
2846         dev_dbg(ddev, "%s - time 1 %ld\n", __func__, jiffies);
2847
2848         /* If not an EPiC device */
2849         if (!edge_serial->is_epic) {
2850                 /* now load the application firmware into this device */
2851                 load_application_firmware(edge_serial);
2852
2853                 dev_dbg(ddev, "%s - time 2 %ld\n", __func__, jiffies);
2854
2855                 /* Check current Edgeport EEPROM and update if necessary */
2856                 update_edgeport_E2PROM(edge_serial);
2857
2858                 dev_dbg(ddev, "%s - time 3 %ld\n", __func__, jiffies);
2859
2860                 /* set the configuration to use #1 */
2861 /*              dev_dbg(ddev, "set_configuration 1\n"); */
2862 /*              usb_set_configuration (dev, 1); */
2863         }
2864         dev_dbg(ddev, "  FirmwareMajorVersion  %d.%d.%d\n",
2865             edge_serial->product_info.FirmwareMajorVersion,
2866             edge_serial->product_info.FirmwareMinorVersion,
2867             le16_to_cpu(edge_serial->product_info.FirmwareBuildNumber));
2868
2869         /* we set up the pointers to the endpoints in the edge_open function,
2870          * as the structures aren't created yet. */
2871
2872         response = 0;
2873
2874         if (edge_serial->is_epic) {
2875                 /* EPIC thing, set up our interrupt polling now and our read
2876                  * urb, so that the device knows it really is connected. */
2877                 interrupt_in_found = bulk_in_found = bulk_out_found = false;
2878                 for (i = 0; i < serial->interface->altsetting[0]
2879                                                 .desc.bNumEndpoints; ++i) {
2880                         struct usb_endpoint_descriptor *endpoint;
2881                         int buffer_size;
2882
2883                         endpoint = &serial->interface->altsetting[0].
2884                                                         endpoint[i].desc;
2885                         buffer_size = usb_endpoint_maxp(endpoint);
2886                         if (!interrupt_in_found &&
2887                             (usb_endpoint_is_int_in(endpoint))) {
2888                                 /* we found a interrupt in endpoint */
2889                                 dev_dbg(ddev, "found interrupt in\n");
2890
2891                                 /* not set up yet, so do it now */
2892                                 edge_serial->interrupt_read_urb =
2893                                                 usb_alloc_urb(0, GFP_KERNEL);
2894                                 if (!edge_serial->interrupt_read_urb) {
2895                                         dev_err(ddev, "out of memory\n");
2896                                         return -ENOMEM;
2897                                 }
2898                                 edge_serial->interrupt_in_buffer =
2899                                         kmalloc(buffer_size, GFP_KERNEL);
2900                                 if (!edge_serial->interrupt_in_buffer) {
2901                                         dev_err(ddev, "out of memory\n");
2902                                         usb_free_urb(edge_serial->interrupt_read_urb);
2903                                         return -ENOMEM;
2904                                 }
2905                                 edge_serial->interrupt_in_endpoint =
2906                                                 endpoint->bEndpointAddress;
2907
2908                                 /* set up our interrupt urb */
2909                                 usb_fill_int_urb(
2910                                         edge_serial->interrupt_read_urb,
2911                                         dev,
2912                                         usb_rcvintpipe(dev,
2913                                                 endpoint->bEndpointAddress),
2914                                         edge_serial->interrupt_in_buffer,
2915                                         buffer_size,
2916                                         edge_interrupt_callback,
2917                                         edge_serial,
2918                                         endpoint->bInterval);
2919
2920                                 interrupt_in_found = true;
2921                         }
2922
2923                         if (!bulk_in_found &&
2924                                 (usb_endpoint_is_bulk_in(endpoint))) {
2925                                 /* we found a bulk in endpoint */
2926                                 dev_dbg(ddev, "found bulk in\n");
2927
2928                                 /* not set up yet, so do it now */
2929                                 edge_serial->read_urb =
2930                                                 usb_alloc_urb(0, GFP_KERNEL);
2931                                 if (!edge_serial->read_urb) {
2932                                         dev_err(ddev, "out of memory\n");
2933                                         return -ENOMEM;
2934                                 }
2935                                 edge_serial->bulk_in_buffer =
2936                                         kmalloc(buffer_size, GFP_KERNEL);
2937                                 if (!edge_serial->bulk_in_buffer) {
2938                                         dev_err(&dev->dev, "out of memory\n");
2939                                         usb_free_urb(edge_serial->read_urb);
2940                                         return -ENOMEM;
2941                                 }
2942                                 edge_serial->bulk_in_endpoint =
2943                                                 endpoint->bEndpointAddress;
2944
2945                                 /* set up our bulk in urb */
2946                                 usb_fill_bulk_urb(edge_serial->read_urb, dev,
2947                                         usb_rcvbulkpipe(dev,
2948                                                 endpoint->bEndpointAddress),
2949                                         edge_serial->bulk_in_buffer,
2950                                         usb_endpoint_maxp(endpoint),
2951                                         edge_bulk_in_callback,
2952                                         edge_serial);
2953                                 bulk_in_found = true;
2954                         }
2955
2956                         if (!bulk_out_found &&
2957                             (usb_endpoint_is_bulk_out(endpoint))) {
2958                                 /* we found a bulk out endpoint */
2959                                 dev_dbg(ddev, "found bulk out\n");
2960                                 edge_serial->bulk_out_endpoint =
2961                                                 endpoint->bEndpointAddress;
2962                                 bulk_out_found = true;
2963                         }
2964                 }
2965
2966                 if (!interrupt_in_found || !bulk_in_found || !bulk_out_found) {
2967                         dev_err(ddev, "Error - the proper endpoints were not found!\n");
2968                         return -ENODEV;
2969                 }
2970
2971                 /* start interrupt read for this edgeport this interrupt will
2972                  * continue as long as the edgeport is connected */
2973                 response = usb_submit_urb(edge_serial->interrupt_read_urb,
2974                                                                 GFP_KERNEL);
2975                 if (response)
2976                         dev_err(ddev, "%s - Error %d submitting control urb\n",
2977                                 __func__, response);
2978         }
2979         return response;
2980 }
2981
2982
2983 /****************************************************************************
2984  * edge_disconnect
2985  *      This function is called whenever the device is removed from the usb bus.
2986  ****************************************************************************/
2987 static void edge_disconnect(struct usb_serial *serial)
2988 {
2989         struct edgeport_serial *edge_serial = usb_get_serial_data(serial);
2990
2991         /* stop reads and writes on all ports */
2992         /* free up our endpoint stuff */
2993         if (edge_serial->is_epic) {
2994                 usb_kill_urb(edge_serial->interrupt_read_urb);
2995                 usb_free_urb(edge_serial->interrupt_read_urb);
2996                 kfree(edge_serial->interrupt_in_buffer);
2997
2998                 usb_kill_urb(edge_serial->read_urb);
2999                 usb_free_urb(edge_serial->read_urb);
3000                 kfree(edge_serial->bulk_in_buffer);
3001         }
3002 }
3003
3004
3005 /****************************************************************************
3006  * edge_release
3007  *      This function is called when the device structure is deallocated.
3008  ****************************************************************************/
3009 static void edge_release(struct usb_serial *serial)
3010 {
3011         struct edgeport_serial *edge_serial = usb_get_serial_data(serial);
3012
3013         kfree(edge_serial);
3014 }
3015
3016 static int edge_port_probe(struct usb_serial_port *port)
3017 {
3018         struct edgeport_port *edge_port;
3019
3020         edge_port = kzalloc(sizeof(*edge_port), GFP_KERNEL);
3021         if (!edge_port)
3022                 return -ENOMEM;
3023
3024         spin_lock_init(&edge_port->ep_lock);
3025         edge_port->port = port;
3026
3027         usb_set_serial_port_data(port, edge_port);
3028
3029         return 0;
3030 }
3031
3032 static int edge_port_remove(struct usb_serial_port *port)
3033 {
3034         struct edgeport_port *edge_port;
3035
3036         edge_port = usb_get_serial_port_data(port);
3037         kfree(edge_port);
3038
3039         return 0;
3040 }
3041
3042 module_usb_serial_driver(serial_drivers, id_table_combined);
3043
3044 MODULE_AUTHOR(DRIVER_AUTHOR);
3045 MODULE_DESCRIPTION(DRIVER_DESC);
3046 MODULE_LICENSE("GPL");
3047 MODULE_FIRMWARE("edgeport/boot.fw");
3048 MODULE_FIRMWARE("edgeport/boot2.fw");
3049 MODULE_FIRMWARE("edgeport/down.fw");
3050 MODULE_FIRMWARE("edgeport/down2.fw");