Pileus Git - ~andy/linux/blob - 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         wait_queue_head_t       delta_msr_wait;         /* for handling sleeping while waiting for msr change to happen */
 114
 115         struct async_icount     icount;
 116         struct usb_serial_port  *port;                  /* loop back to the owner of this object */
 117 };
 118
 119
 120 /* This structure holds all of the individual device information */
 121 struct edgeport_serial {
 122         char                    name[MAX_NAME_LEN+2];           /* string name of this device */
 123
 124         struct edge_manuf_descriptor    manuf_descriptor;       /* the manufacturer descriptor */
 125         struct edge_boot_descriptor     boot_descriptor;        /* the boot firmware descriptor */
 126         struct edgeport_product_info    product_info;           /* Product Info */
 127         struct edge_compatibility_descriptor epic_descriptor;   /* Edgeport compatible descriptor */
 128         int                     is_epic;                        /* flag if EPiC device or not */
 129
 130         __u8                    interrupt_in_endpoint;          /* the interrupt endpoint handle */
 131         unsigned char           *interrupt_in_buffer;           /* the buffer we use for the interrupt endpoint */
 132         struct urb              *interrupt_read_urb;            /* our interrupt urb */
 133
 134         __u8                    bulk_in_endpoint;               /* the bulk in endpoint handle */
 135         unsigned char           *bulk_in_buffer;                /* the buffer we use for the bulk in endpoint */
 136         struct urb              *read_urb;                      /* our bulk read urb */
 137         bool                    read_in_progress;
 138         spinlock_t              es_lock;
 139
 140         __u8                    bulk_out_endpoint;              /* the bulk out endpoint handle */
 141
 142         __s16                   rxBytesAvail;                   /* the number of bytes that we need to read from this device */
 143
 144         enum RXSTATE            rxState;                        /* the current state of the bulk receive processor */
 145         __u8                    rxHeader1;                      /* receive header byte 1 */
 146         __u8                    rxHeader2;                      /* receive header byte 2 */
 147         __u8                    rxHeader3;                      /* receive header byte 3 */
 148         __u8                    rxPort;                         /* the port that we are currently receiving data for */
 149         __u8                    rxStatusCode;                   /* the receive status code */
 150         __u8                    rxStatusParam;                  /* the receive status paramater */
 151         __s16                   rxBytesRemaining;               /* the number of port bytes left to read */
 152         struct usb_serial       *serial;                        /* loop back to the owner of this object */
 153 };
 154
 155 /* baud rate information */
 156 struct divisor_table_entry {
 157         __u32   BaudRate;
 158         __u16  Divisor;
 159 };
 160
 161 /*
 162  * Define table of divisors for Rev A EdgePort/4 hardware
 163  * These assume a 3.6864MHz crystal, the standard /16, and
 164  * MCR.7 = 0.
 165  */
 166
 167 static const struct divisor_table_entry divisor_table[] = {
 168         {   50,         4608},
 169         {   75,         3072},
 170         {   110,        2095},  /* 2094.545455 => 230450   => .0217 % over */
 171         {   134,        1713},  /* 1713.011152 => 230398.5 => .00065% under */
 172         {   150,        1536},
 173         {   300,        768},
 174         {   600,        384},
 175         {   1200,       192},
 176         {   1800,       128},
 177         {   2400,       96},
 178         {   4800,       48},
 179         {   7200,       32},
 180         {   9600,       24},
 181         {   14400,      16},
 182         {   19200,      12},
 183         {   38400,      6},
 184         {   57600,      4},
 185         {   115200,     2},
 186         {   230400,     1},
 187 };
 188
 189 /* Number of outstanding Command Write Urbs */
 190 static atomic_t CmdUrbs = ATOMIC_INIT(0);
 191
 192
 193 /* local function prototypes */
 194
 195 /* function prototypes for all URB callbacks */
 196 static void edge_interrupt_callback(struct urb *urb);
 197 static void edge_bulk_in_callback(struct urb *urb);
 198 static void edge_bulk_out_data_callback(struct urb *urb);
 199 static void edge_bulk_out_cmd_callback(struct urb *urb);
 200
 201 /* function prototypes for the usbserial callbacks */
 202 static int edge_open(struct tty_struct *tty, struct usb_serial_port *port);
 203 static void edge_close(struct usb_serial_port *port);
 204 static int edge_write(struct tty_struct *tty, struct usb_serial_port *port,
 205                                         const unsigned char *buf, int count);
 206 static int edge_write_room(struct tty_struct *tty);
 207 static int edge_chars_in_buffer(struct tty_struct *tty);
 208 static void edge_throttle(struct tty_struct *tty);
 209 static void edge_unthrottle(struct tty_struct *tty);
 210 static void edge_set_termios(struct tty_struct *tty,
 211                                         struct usb_serial_port *port,
 212                                         struct ktermios *old_termios);
 213 static int  edge_ioctl(struct tty_struct *tty,
 214                                         unsigned int cmd, unsigned long arg);
 215 static void edge_break(struct tty_struct *tty, int break_state);
 216 static int  edge_tiocmget(struct tty_struct *tty);
 217 static int  edge_tiocmset(struct tty_struct *tty,
 218                                         unsigned int set, unsigned int clear);
 219 static int  edge_get_icount(struct tty_struct *tty,
 220                                 struct serial_icounter_struct *icount);
 221 static int  edge_startup(struct usb_serial *serial);
 222 static void edge_disconnect(struct usb_serial *serial);
 223 static void edge_release(struct usb_serial *serial);
 224 static int edge_port_probe(struct usb_serial_port *port);
 225 static int edge_port_remove(struct usb_serial_port *port);
 226
 227 #include "io_tables.h"  /* all of the devices that this driver supports */
 228
 229 /* function prototypes for all of our local functions */
 230
 231 static void  process_rcvd_data(struct edgeport_serial *edge_serial,
 232                                 unsigned char *buffer, __u16 bufferLength);
 233 static void process_rcvd_status(struct edgeport_serial *edge_serial,
 234                                 __u8 byte2, __u8 byte3);
 235 static void edge_tty_recv(struct usb_serial_port *port, unsigned char *data,
 236                 int length);
 237 static void handle_new_msr(struct edgeport_port *edge_port, __u8 newMsr);
 238 static void handle_new_lsr(struct edgeport_port *edge_port, __u8 lsrData,
 239                                 __u8 lsr, __u8 data);
 240 static int  send_iosp_ext_cmd(struct edgeport_port *edge_port, __u8 command,
 241                                 __u8 param);
 242 static int  calc_baud_rate_divisor(struct device *dev, int baud_rate, int *divisor);
 243 static int  send_cmd_write_baud_rate(struct edgeport_port *edge_port,
 244                                 int baudRate);
 245 static void change_port_settings(struct tty_struct *tty,
 246                                 struct edgeport_port *edge_port,
 247                                 struct ktermios *old_termios);
 248 static int  send_cmd_write_uart_register(struct edgeport_port *edge_port,
 249                                 __u8 regNum, __u8 regValue);
 250 static int  write_cmd_usb(struct edgeport_port *edge_port,
 251                                 unsigned char *buffer, int writeLength);
 252 static void send_more_port_data(struct edgeport_serial *edge_serial,
 253                                 struct edgeport_port *edge_port);
 254
 255 static int sram_write(struct usb_serial *serial, __u16 extAddr, __u16 addr,
 256                                         __u16 length, const __u8 *data);
 257 static int rom_read(struct usb_serial *serial, __u16 extAddr, __u16 addr,
 258                                                 __u16 length, __u8 *data);
 259 static int rom_write(struct usb_serial *serial, __u16 extAddr, __u16 addr,
 260                                         __u16 length, const __u8 *data);
 261 static void get_manufacturing_desc(struct edgeport_serial *edge_serial);
 262 static void get_boot_desc(struct edgeport_serial *edge_serial);
 263 static void load_application_firmware(struct edgeport_serial *edge_serial);
 264
 265 static void unicode_to_ascii(char *string, int buflen,
 266                                 __le16 *unicode, int unicode_size);
 267
 268
 269 /* ************************************************************************ */
 270 /* ************************************************************************ */
 271 /* ************************************************************************ */
 272 /* ************************************************************************ */
 273
 274 /************************************************************************
 275  *                                                                      *
 276  * update_edgeport_E2PROM()     Compare current versions of             *
 277  *                              Boot ROM and Manufacture                *
 278  *                              Descriptors with versions               *
 279  *                              embedded in this driver                 *
 280  *                                                                      *
 281  ************************************************************************/
 282 static void update_edgeport_E2PROM(struct edgeport_serial *edge_serial)
 283 {
 284         struct device *dev = &edge_serial->serial->dev->dev;
 285         __u32 BootCurVer;
 286         __u32 BootNewVer;
 287         __u8 BootMajorVersion;
 288         __u8 BootMinorVersion;
 289         __u16 BootBuildNumber;
 290         __u32 Bootaddr;
 291         const struct ihex_binrec *rec;
 292         const struct firmware *fw;
 293         const char *fw_name;
 294         int response;
 295
 296         switch (edge_serial->product_info.iDownloadFile) {
 297         case EDGE_DOWNLOAD_FILE_I930:
 298                 fw_name = "edgeport/boot.fw";
 299                 break;
 300         case EDGE_DOWNLOAD_FILE_80251:
 301                 fw_name = "edgeport/boot2.fw";
 302                 break;
 303         default:
 304                 return;
 305         }
 306
 307         response = request_ihex_firmware(&fw, fw_name,
 308                                          &edge_serial->serial->dev->dev);
 309         if (response) {
 310                 dev_err(dev, "Failed to load image \"%s\" err %d\n",
 311                        fw_name, response);
 312                 return;
 313         }
 314
 315         rec = (const struct ihex_binrec *)fw->data;
 316         BootMajorVersion = rec->data[0];
 317         BootMinorVersion = rec->data[1];
 318         BootBuildNumber = (rec->data[2] << 8) | rec->data[3];
 319
 320         /* Check Boot Image Version */
 321         BootCurVer = (edge_serial->boot_descriptor.MajorVersion << 24) +
 322                      (edge_serial->boot_descriptor.MinorVersion << 16) +
 323                       le16_to_cpu(edge_serial->boot_descriptor.BuildNumber);
 324
 325         BootNewVer = (BootMajorVersion << 24) +
 326                      (BootMinorVersion << 16) +
 327                       BootBuildNumber;
 328
 329         dev_dbg(dev, "Current Boot Image version %d.%d.%d\n",
 330             edge_serial->boot_descriptor.MajorVersion,
 331             edge_serial->boot_descriptor.MinorVersion,
 332             le16_to_cpu(edge_serial->boot_descriptor.BuildNumber));
 333
 334
 335         if (BootNewVer > BootCurVer) {
 336                 dev_dbg(dev, "**Update Boot Image from %d.%d.%d to %d.%d.%d\n",
 337                     edge_serial->boot_descriptor.MajorVersion,
 338                     edge_serial->boot_descriptor.MinorVersion,
 339                     le16_to_cpu(edge_serial->boot_descriptor.BuildNumber),
 340                     BootMajorVersion, BootMinorVersion, BootBuildNumber);
 341
 342                 dev_dbg(dev, "Downloading new Boot Image\n");
 343
 344                 for (rec = ihex_next_binrec(rec); rec;
 345                      rec = ihex_next_binrec(rec)) {
 346                         Bootaddr = be32_to_cpu(rec->addr);
 347                         response = rom_write(edge_serial->serial,
 348                                              Bootaddr >> 16,
 349                                              Bootaddr & 0xFFFF,
 350                                              be16_to_cpu(rec->len),
 351                                              &rec->data[0]);
 352                         if (response < 0) {
 353                                 dev_err(&edge_serial->serial->dev->dev,
 354                                         "rom_write failed (%x, %x, %d)\n",
 355                                         Bootaddr >> 16, Bootaddr & 0xFFFF,
 356                                         be16_to_cpu(rec->len));
 357                                 break;
 358                         }
 359                 }
 360         } else {
 361                 dev_dbg(dev, "Boot Image -- already up to date\n");
 362         }
 363         release_firmware(fw);
 364 }
 365
 366 #if 0
 367 /************************************************************************
 368  *
 369  *  Get string descriptor from device
 370  *
 371  ************************************************************************/
 372 static int get_string_desc(struct usb_device *dev, int Id,
 373                                 struct usb_string_descriptor **pRetDesc)
 374 {
 375         struct usb_string_descriptor StringDesc;
 376         struct usb_string_descriptor *pStringDesc;
 377
 378         dev_dbg(&dev->dev, "%s - USB String ID = %d\n", __func__, Id);
 379
 380         if (!usb_get_descriptor(dev, USB_DT_STRING, Id, &StringDesc,
 381                                                 sizeof(StringDesc)))
 382                 return 0;
 383
 384         pStringDesc = kmalloc(StringDesc.bLength, GFP_KERNEL);
 385         if (!pStringDesc)
 386                 return -1;
 387
 388         if (!usb_get_descriptor(dev, USB_DT_STRING, Id, pStringDesc,
 389                                                         StringDesc.bLength)) {
 390                 kfree(pStringDesc);
 391                 return -1;
 392         }
 393
 394         *pRetDesc = pStringDesc;
 395         return 0;
 396 }
 397 #endif
 398
 399 static void dump_product_info(struct edgeport_serial *edge_serial,
 400                               struct edgeport_product_info *product_info)
 401 {
 402         struct device *dev = &edge_serial->serial->dev->dev;
 403
 404         /* Dump Product Info structure */
 405         dev_dbg(dev, "**Product Information:\n");
 406         dev_dbg(dev, "  ProductId             %x\n", product_info->ProductId);
 407         dev_dbg(dev, "  NumPorts              %d\n", product_info->NumPorts);
 408         dev_dbg(dev, "  ProdInfoVer           %d\n", product_info->ProdInfoVer);
 409         dev_dbg(dev, "  IsServer              %d\n", product_info->IsServer);
 410         dev_dbg(dev, "  IsRS232               %d\n", product_info->IsRS232);
 411         dev_dbg(dev, "  IsRS422               %d\n", product_info->IsRS422);
 412         dev_dbg(dev, "  IsRS485               %d\n", product_info->IsRS485);
 413         dev_dbg(dev, "  RomSize               %d\n", product_info->RomSize);
 414         dev_dbg(dev, "  RamSize               %d\n", product_info->RamSize);
 415         dev_dbg(dev, "  CpuRev                %x\n", product_info->CpuRev);
 416         dev_dbg(dev, "  BoardRev              %x\n", product_info->BoardRev);
 417         dev_dbg(dev, "  BootMajorVersion      %d.%d.%d\n",
 418                 product_info->BootMajorVersion,
 419                 product_info->BootMinorVersion,
 420                 le16_to_cpu(product_info->BootBuildNumber));
 421         dev_dbg(dev, "  FirmwareMajorVersion  %d.%d.%d\n",
 422                 product_info->FirmwareMajorVersion,
 423                 product_info->FirmwareMinorVersion,
 424                 le16_to_cpu(product_info->FirmwareBuildNumber));
 425         dev_dbg(dev, "  ManufactureDescDate   %d/%d/%d\n",
 426                 product_info->ManufactureDescDate[0],
 427                 product_info->ManufactureDescDate[1],
 428                 product_info->ManufactureDescDate[2]+1900);
 429         dev_dbg(dev, "  iDownloadFile         0x%x\n",
 430                 product_info->iDownloadFile);
 431         dev_dbg(dev, "  EpicVer               %d\n", product_info->EpicVer);
 432 }
 433
 434 static void get_product_info(struct edgeport_serial *edge_serial)
 435 {
 436         struct edgeport_product_info *product_info = &edge_serial->product_info;
 437
 438         memset(product_info, 0, sizeof(struct edgeport_product_info));
 439
 440         product_info->ProductId = (__u16)(le16_to_cpu(edge_serial->serial->dev->descriptor.idProduct) & ~ION_DEVICE_ID_80251_NETCHIP);
 441         product_info->NumPorts = edge_serial->manuf_descriptor.NumPorts;
 442         product_info->ProdInfoVer = 0;
 443
 444         product_info->RomSize = edge_serial->manuf_descriptor.RomSize;
 445         product_info->RamSize = edge_serial->manuf_descriptor.RamSize;
 446         product_info->CpuRev = edge_serial->manuf_descriptor.CpuRev;
 447         product_info->BoardRev = edge_serial->manuf_descriptor.BoardRev;
 448
 449         product_info->BootMajorVersion =
 450                                 edge_serial->boot_descriptor.MajorVersion;
 451         product_info->BootMinorVersion =
 452                                 edge_serial->boot_descriptor.MinorVersion;
 453         product_info->BootBuildNumber =
 454                                 edge_serial->boot_descriptor.BuildNumber;
 455
 456         memcpy(product_info->ManufactureDescDate,
 457                         edge_serial->manuf_descriptor.DescDate,
 458                         sizeof(edge_serial->manuf_descriptor.DescDate));
 459
 460         /* check if this is 2nd generation hardware */
 461         if (le16_to_cpu(edge_serial->serial->dev->descriptor.idProduct)
 462                                             & ION_DEVICE_ID_80251_NETCHIP)
 463                 product_info->iDownloadFile = EDGE_DOWNLOAD_FILE_80251;
 464         else
 465                 product_info->iDownloadFile = EDGE_DOWNLOAD_FILE_I930;
 466
 467         /* Determine Product type and set appropriate flags */
 468         switch (DEVICE_ID_FROM_USB_PRODUCT_ID(product_info->ProductId)) {
 469         case ION_DEVICE_ID_EDGEPORT_COMPATIBLE:
 470         case ION_DEVICE_ID_EDGEPORT_4T:
 471         case ION_DEVICE_ID_EDGEPORT_4:
 472         case ION_DEVICE_ID_EDGEPORT_2:
 473         case ION_DEVICE_ID_EDGEPORT_8_DUAL_CPU:
 474         case ION_DEVICE_ID_EDGEPORT_8:
 475         case ION_DEVICE_ID_EDGEPORT_421:
 476         case ION_DEVICE_ID_EDGEPORT_21:
 477         case ION_DEVICE_ID_EDGEPORT_2_DIN:
 478         case ION_DEVICE_ID_EDGEPORT_4_DIN:
 479         case ION_DEVICE_ID_EDGEPORT_16_DUAL_CPU:
 480                 product_info->IsRS232 = 1;
 481                 break;
 482
 483         case ION_DEVICE_ID_EDGEPORT_2I: /* Edgeport/2 RS422/RS485 */
 484                 product_info->IsRS422 = 1;
 485                 product_info->IsRS485 = 1;
 486                 break;
 487
 488         case ION_DEVICE_ID_EDGEPORT_8I: /* Edgeport/4 RS422 */
 489         case ION_DEVICE_ID_EDGEPORT_4I: /* Edgeport/4 RS422 */
 490                 product_info->IsRS422 = 1;
 491                 break;
 492         }
 493
 494         dump_product_info(edge_serial, product_info);
 495 }
 496
 497 static int get_epic_descriptor(struct edgeport_serial *ep)
 498 {
 499         int result;
 500         struct usb_serial *serial = ep->serial;
 501         struct edgeport_product_info *product_info = &ep->product_info;
 502         struct edge_compatibility_descriptor *epic = &ep->epic_descriptor;
 503         struct edge_compatibility_bits *bits;
 504         struct device *dev = &serial->dev->dev;
 505
 506         ep->is_epic = 0;
 507         result = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
 508                                  USB_REQUEST_ION_GET_EPIC_DESC,
 509                                  0xC0, 0x00, 0x00,
 510                                  &ep->epic_descriptor,
 511                                  sizeof(struct edge_compatibility_descriptor),
 512                                  300);
 513
 514         if (result > 0) {
 515                 ep->is_epic = 1;
 516                 memset(product_info, 0, sizeof(struct edgeport_product_info));
 517
 518                 product_info->NumPorts = epic->NumPorts;
 519                 product_info->ProdInfoVer = 0;
 520                 product_info->FirmwareMajorVersion = epic->MajorVersion;
 521                 product_info->FirmwareMinorVersion = epic->MinorVersion;
 522                 product_info->FirmwareBuildNumber = epic->BuildNumber;
 523                 product_info->iDownloadFile = epic->iDownloadFile;
 524                 product_info->EpicVer = epic->EpicVer;
 525                 product_info->Epic = epic->Supports;
 526                 product_info->ProductId = ION_DEVICE_ID_EDGEPORT_COMPATIBLE;
 527                 dump_product_info(ep, product_info);
 528
 529                 bits = &ep->epic_descriptor.Supports;
 530                 dev_dbg(dev, "**EPIC descriptor:\n");
 531                 dev_dbg(dev, "  VendEnableSuspend: %s\n", bits->VendEnableSuspend ? "TRUE": "FALSE");
 532                 dev_dbg(dev, "  IOSPOpen         : %s\n", bits->IOSPOpen        ? "TRUE": "FALSE");
 533                 dev_dbg(dev, "  IOSPClose        : %s\n", bits->IOSPClose       ? "TRUE": "FALSE");
 534                 dev_dbg(dev, "  IOSPChase        : %s\n", bits->IOSPChase       ? "TRUE": "FALSE");
 535                 dev_dbg(dev, "  IOSPSetRxFlow    : %s\n", bits->IOSPSetRxFlow   ? "TRUE": "FALSE");
 536                 dev_dbg(dev, "  IOSPSetTxFlow    : %s\n", bits->IOSPSetTxFlow   ? "TRUE": "FALSE");
 537                 dev_dbg(dev, "  IOSPSetXChar     : %s\n", bits->IOSPSetXChar    ? "TRUE": "FALSE");
 538                 dev_dbg(dev, "  IOSPRxCheck      : %s\n", bits->IOSPRxCheck     ? "TRUE": "FALSE");
 539                 dev_dbg(dev, "  IOSPSetClrBreak  : %s\n", bits->IOSPSetClrBreak ? "TRUE": "FALSE");
 540                 dev_dbg(dev, "  IOSPWriteMCR     : %s\n", bits->IOSPWriteMCR    ? "TRUE": "FALSE");
 541                 dev_dbg(dev, "  IOSPWriteLCR     : %s\n", bits->IOSPWriteLCR    ? "TRUE": "FALSE");
 542                 dev_dbg(dev, "  IOSPSetBaudRate  : %s\n", bits->IOSPSetBaudRate ? "TRUE": "FALSE");
 543                 dev_dbg(dev, "  TrueEdgeport     : %s\n", bits->TrueEdgeport    ? "TRUE": "FALSE");
 544         }
 545
 546         return result;
 547 }
 548
 549
 550 /************************************************************************/
 551 /************************************************************************/
 552 /*            U S B  C A L L B A C K   F U N C T I O N S                */
 553 /*            U S B  C A L L B A C K   F U N C T I O N S                */
 554 /************************************************************************/
 555 /************************************************************************/
 556
 557 /*****************************************************************************
 558  * edge_interrupt_callback
 559  *      this is the callback function for when we have received data on the
 560  *      interrupt endpoint.
 561  *****************************************************************************/
 562 static void edge_interrupt_callback(struct urb *urb)
 563 {
 564         struct edgeport_serial *edge_serial = urb->context;
 565         struct device *dev;
 566         struct edgeport_port *edge_port;
 567         struct usb_serial_port *port;
 568         struct tty_struct *tty;
 569         unsigned char *data = urb->transfer_buffer;
 570         int length = urb->actual_length;
 571         int bytes_avail;
 572         int position;
 573         int txCredits;
 574         int portNumber;
 575         int result;
 576         int status = urb->status;
 577
 578         switch (status) {
 579         case 0:
 580                 /* success */
 581                 break;
 582         case -ECONNRESET:
 583         case -ENOENT:
 584         case -ESHUTDOWN:
 585                 /* this urb is terminated, clean up */
 586                 dev_dbg(&urb->dev->dev, "%s - urb shutting down with status: %d\n", __func__, status);
 587                 return;
 588         default:
 589                 dev_dbg(&urb->dev->dev, "%s - nonzero urb status received: %d\n", __func__, status);
 590                 goto exit;
 591         }
 592
 593         dev = &edge_serial->serial->dev->dev;
 594
 595         /* process this interrupt-read even if there are no ports open */
 596         if (length) {
 597                 usb_serial_debug_data(dev, __func__, length, data);
 598
 599                 if (length > 1) {
 600                         bytes_avail = data[0] | (data[1] << 8);
 601                         if (bytes_avail) {
 602                                 spin_lock(&edge_serial->es_lock);
 603                                 edge_serial->rxBytesAvail += bytes_avail;
 604                                 dev_dbg(dev,
 605                                         "%s - bytes_avail=%d, rxBytesAvail=%d, read_in_progress=%d\n",
 606                                         __func__, bytes_avail,
 607                                         edge_serial->rxBytesAvail,
 608                                         edge_serial->read_in_progress);
 609
 610                                 if (edge_serial->rxBytesAvail > 0 &&
 611                                     !edge_serial->read_in_progress) {
 612                                         dev_dbg(dev, "%s - posting a read\n", __func__);
 613                                         edge_serial->read_in_progress = true;
 614
 615                                         /* we have pending bytes on the
 616                                            bulk in pipe, send a request */
 617                                         result = usb_submit_urb(edge_serial->read_urb, GFP_ATOMIC);
 618                                         if (result) {
 619                                                 dev_err(dev,
 620                                                         "%s - usb_submit_urb(read bulk) failed with result = %d\n",
 621                                                         __func__, result);
 622                                                 edge_serial->read_in_progress = false;
 623                                         }
 624                                 }
 625                                 spin_unlock(&edge_serial->es_lock);
 626                         }
 627                 }
 628                 /* grab the txcredits for the ports if available */
 629                 position = 2;
 630                 portNumber = 0;
 631                 while ((position < length) &&
 632                                 (portNumber < edge_serial->serial->num_ports)) {
 633                         txCredits = data[position] | (data[position+1] << 8);
 634                         if (txCredits) {
 635                                 port = edge_serial->serial->port[portNumber];
 636                                 edge_port = usb_get_serial_port_data(port);
 637                                 if (edge_port->open) {
 638                                         spin_lock(&edge_port->ep_lock);
 639                                         edge_port->txCredits += txCredits;
 640                                         spin_unlock(&edge_port->ep_lock);
 641                                         dev_dbg(dev, "%s - txcredits for port%d = %d\n",
 642                                                 __func__, portNumber,
 643                                                 edge_port->txCredits);
 644
 645                                         /* tell the tty driver that something
 646                                            has changed */
 647                                         tty = tty_port_tty_get(
 648                                                 &edge_port->port->port);
 649                                         if (tty) {
 650                                                 tty_wakeup(tty);
 651                                                 tty_kref_put(tty);
 652                                         }
 653                                         /* Since we have more credit, check
 654                                            if more data can be sent */
 655                                         send_more_port_data(edge_serial,
 656                                                                 edge_port);
 657                                 }
 658                         }
 659                         position += 2;
 660                         ++portNumber;
 661                 }
 662         }
 663
 664 exit:
 665         result = usb_submit_urb(urb, GFP_ATOMIC);
 666         if (result)
 667                 dev_err(&urb->dev->dev,
 668                         "%s - Error %d submitting control urb\n",
 669                                                 __func__, result);
 670 }
 671
 672
 673 /*****************************************************************************
 674  * edge_bulk_in_callback
 675  *      this is the callback function for when we have received data on the
 676  *      bulk in endpoint.
 677  *****************************************************************************/
 678 static void edge_bulk_in_callback(struct urb *urb)
 679 {
 680         struct edgeport_serial  *edge_serial = urb->context;
 681         struct device *dev;
 682         unsigned char           *data = urb->transfer_buffer;
 683         int                     retval;
 684         __u16                   raw_data_length;
 685         int status = urb->status;
 686
 687         if (status) {
 688                 dev_dbg(&urb->dev->dev, "%s - nonzero read bulk status received: %d\n",
 689                         __func__, status);
 690                 edge_serial->read_in_progress = false;
 691                 return;
 692         }
 693
 694         if (urb->actual_length == 0) {
 695                 dev_dbg(&urb->dev->dev, "%s - read bulk callback with no data\n", __func__);
 696                 edge_serial->read_in_progress = false;
 697                 return;
 698         }
 699
 700         dev = &edge_serial->serial->dev->dev;
 701         raw_data_length = urb->actual_length;
 702
 703         usb_serial_debug_data(dev, __func__, raw_data_length, data);
 704
 705         spin_lock(&edge_serial->es_lock);
 706
 707         /* decrement our rxBytes available by the number that we just got */
 708         edge_serial->rxBytesAvail -= raw_data_length;
 709
 710         dev_dbg(dev, "%s - Received = %d, rxBytesAvail %d\n", __func__,
 711                 raw_data_length, edge_serial->rxBytesAvail);
 712
 713         process_rcvd_data(edge_serial, data, urb->actual_length);
 714
 715         /* check to see if there's any more data for us to read */
 716         if (edge_serial->rxBytesAvail > 0) {
 717                 dev_dbg(dev, "%s - posting a read\n", __func__);
 718                 retval = usb_submit_urb(edge_serial->read_urb, GFP_ATOMIC);
 719                 if (retval) {
 720                         dev_err(dev,
 721                                 "%s - usb_submit_urb(read bulk) failed, retval = %d\n",
 722                                 __func__, retval);
 723                         edge_serial->read_in_progress = false;
 724                 }
 725         } else {
 726                 edge_serial->read_in_progress = false;
 727         }
 728
 729         spin_unlock(&edge_serial->es_lock);
 730 }
 731
 732
 733 /*****************************************************************************
 734  * edge_bulk_out_data_callback
 735  *      this is the callback function for when we have finished sending
 736  *      serial data on the bulk out endpoint.
 737  *****************************************************************************/
 738 static void edge_bulk_out_data_callback(struct urb *urb)
 739 {
 740         struct edgeport_port *edge_port = urb->context;
 741         struct tty_struct *tty;
 742         int status = urb->status;
 743
 744         if (status) {
 745                 dev_dbg(&urb->dev->dev,
 746                         "%s - nonzero write bulk status received: %d\n",
 747                         __func__, status);
 748         }
 749
 750         tty = tty_port_tty_get(&edge_port->port->port);
 751
 752         if (tty && edge_port->open) {
 753                 /* let the tty driver wakeup if it has a special
 754                    write_wakeup function */
 755                 tty_wakeup(tty);
 756         }
 757         tty_kref_put(tty);
 758
 759         /* Release the Write URB */
 760         edge_port->write_in_progress = false;
 761
 762         /* Check if more data needs to be sent */
 763         send_more_port_data((struct edgeport_serial *)
 764                 (usb_get_serial_data(edge_port->port->serial)), edge_port);
 765 }
 766
 767
 768 /*****************************************************************************
 769  * BulkOutCmdCallback
 770  *      this is the callback function for when we have finished sending a
 771  *      command on the bulk out endpoint.
 772  *****************************************************************************/
 773 static void edge_bulk_out_cmd_callback(struct urb *urb)
 774 {
 775         struct edgeport_port *edge_port = urb->context;
 776         struct tty_struct *tty;
 777         int status = urb->status;
 778
 779         atomic_dec(&CmdUrbs);
 780         dev_dbg(&urb->dev->dev, "%s - FREE URB %p (outstanding %d)\n",
 781                 __func__, urb, atomic_read(&CmdUrbs));
 782
 783
 784         /* clean up the transfer buffer */
 785         kfree(urb->transfer_buffer);
 786
 787         /* Free the command urb */
 788         usb_free_urb(urb);
 789
 790         if (status) {
 791                 dev_dbg(&urb->dev->dev,
 792                         "%s - nonzero write bulk status received: %d\n",
 793                         __func__, status);
 794                 return;
 795         }
 796
 797         /* Get pointer to tty */
 798         tty = tty_port_tty_get(&edge_port->port->port);
 799
 800         /* tell the tty driver that something has changed */
 801         if (tty && edge_port->open)
 802                 tty_wakeup(tty);
 803         tty_kref_put(tty);
 804
 805         /* we have completed the command */
 806         edge_port->commandPending = false;
 807         wake_up(&edge_port->wait_command);
 808 }
 809
 810
 811 /*****************************************************************************
 812  * Driver tty interface functions
 813  *****************************************************************************/
 814
 815 /*****************************************************************************
 816  * SerialOpen
 817  *      this function is called by the tty driver when a port is opened
 818  *      If successful, we return 0
 819  *      Otherwise we return a negative error number.
 820  *****************************************************************************/
 821 static int edge_open(struct tty_struct *tty, struct usb_serial_port *port)
 822 {
 823         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
 824         struct device *dev = &port->dev;
 825         struct usb_serial *serial;
 826         struct edgeport_serial *edge_serial;
 827         int response;
 828
 829         if (edge_port == NULL)
 830                 return -ENODEV;
 831
 832         /* see if we've set up our endpoint info yet (can't set it up
 833            in edge_startup as the structures were not set up at that time.) */
 834         serial = port->serial;
 835         edge_serial = usb_get_serial_data(serial);
 836         if (edge_serial == NULL)
 837                 return -ENODEV;
 838         if (edge_serial->interrupt_in_buffer == NULL) {
 839                 struct usb_serial_port *port0 = serial->port[0];
 840
 841                 /* not set up yet, so do it now */
 842                 edge_serial->interrupt_in_buffer =
 843                                         port0->interrupt_in_buffer;
 844                 edge_serial->interrupt_in_endpoint =
 845                                         port0->interrupt_in_endpointAddress;
 846                 edge_serial->interrupt_read_urb = port0->interrupt_in_urb;
 847                 edge_serial->bulk_in_buffer = port0->bulk_in_buffer;
 848                 edge_serial->bulk_in_endpoint =
 849                                         port0->bulk_in_endpointAddress;
 850                 edge_serial->read_urb = port0->read_urb;
 851                 edge_serial->bulk_out_endpoint =
 852                                         port0->bulk_out_endpointAddress;
 853
 854                 /* set up our interrupt urb */
 855                 usb_fill_int_urb(edge_serial->interrupt_read_urb,
 856                       serial->dev,
 857                       usb_rcvintpipe(serial->dev,
 858                                 port0->interrupt_in_endpointAddress),
 859                       port0->interrupt_in_buffer,
 860                       edge_serial->interrupt_read_urb->transfer_buffer_length,
 861                       edge_interrupt_callback, edge_serial,
 862                       edge_serial->interrupt_read_urb->interval);
 863
 864                 /* set up our bulk in urb */
 865                 usb_fill_bulk_urb(edge_serial->read_urb, serial->dev,
 866                         usb_rcvbulkpipe(serial->dev,
 867                                 port0->bulk_in_endpointAddress),
 868                         port0->bulk_in_buffer,
 869                         edge_serial->read_urb->transfer_buffer_length,
 870                         edge_bulk_in_callback, edge_serial);
 871                 edge_serial->read_in_progress = false;
 872
 873                 /* start interrupt read for this edgeport
 874                  * this interrupt will continue as long
 875                  * as the edgeport is connected */
 876                 response = usb_submit_urb(edge_serial->interrupt_read_urb,
 877                                                                 GFP_KERNEL);
 878                 if (response) {
 879                         dev_err(dev, "%s - Error %d submitting control urb\n",
 880                                 __func__, response);
 881                 }
 882         }
 883
 884         /* initialize our wait queues */
 885         init_waitqueue_head(&edge_port->wait_open);
 886         init_waitqueue_head(&edge_port->wait_chase);
 887         init_waitqueue_head(&edge_port->delta_msr_wait);
 888         init_waitqueue_head(&edge_port->wait_command);
 889
 890         /* initialize our icount structure */
 891         memset(&(edge_port->icount), 0x00, sizeof(edge_port->icount));
 892
 893         /* initialize our port settings */
 894         edge_port->txCredits = 0;       /* Can't send any data yet */
 895         /* Must always set this bit to enable ints! */
 896         edge_port->shadowMCR = MCR_MASTER_IE;
 897         edge_port->chaseResponsePending = false;
 898
 899         /* send a open port command */
 900         edge_port->openPending = true;
 901         edge_port->open        = false;
 902         response = send_iosp_ext_cmd(edge_port, IOSP_CMD_OPEN_PORT, 0);
 903
 904         if (response < 0) {
 905                 dev_err(dev, "%s - error sending open port command\n", __func__);
 906                 edge_port->openPending = false;
 907                 return -ENODEV;
 908         }
 909
 910         /* now wait for the port to be completely opened */
 911         wait_event_timeout(edge_port->wait_open, !edge_port->openPending,
 912                                                                 OPEN_TIMEOUT);
 913
 914         if (!edge_port->open) {
 915                 /* open timed out */
 916                 dev_dbg(dev, "%s - open timedout\n", __func__);
 917                 edge_port->openPending = false;
 918                 return -ENODEV;
 919         }
 920
 921         /* create the txfifo */
 922         edge_port->txfifo.head  = 0;
 923         edge_port->txfifo.tail  = 0;
 924         edge_port->txfifo.count = 0;
 925         edge_port->txfifo.size  = edge_port->maxTxCredits;
 926         edge_port->txfifo.fifo  = kmalloc(edge_port->maxTxCredits, GFP_KERNEL);
 927
 928         if (!edge_port->txfifo.fifo) {
 929                 dev_dbg(dev, "%s - no memory\n", __func__);
 930                 edge_close(port);
 931                 return -ENOMEM;
 932         }
 933
 934         /* Allocate a URB for the write */
 935         edge_port->write_urb = usb_alloc_urb(0, GFP_KERNEL);
 936         edge_port->write_in_progress = false;
 937
 938         if (!edge_port->write_urb) {
 939                 dev_dbg(dev, "%s - no memory\n", __func__);
 940                 edge_close(port);
 941                 return -ENOMEM;
 942         }
 943
 944         dev_dbg(dev, "%s(%d) - Initialize TX fifo to %d bytes\n",
 945                 __func__, port->number, edge_port->maxTxCredits);
 946
 947         return 0;
 948 }
 949
 950
 951 /************************************************************************
 952  *
 953  * block_until_chase_response
 954  *
 955  *      This function will block the close until one of the following:
 956  *              1. Response to our Chase comes from Edgeport
 957  *              2. A timeout of 10 seconds without activity has expired
 958  *                 (1K of Edgeport data @ 2400 baud ==> 4 sec to empty)
 959  *
 960  ************************************************************************/
 961 static void block_until_chase_response(struct edgeport_port *edge_port)
 962 {
 963         struct device *dev = &edge_port->port->dev;
 964         DEFINE_WAIT(wait);
 965         __u16 lastCredits;
 966         int timeout = 1*HZ;
 967         int loop = 10;
 968
 969         while (1) {
 970                 /* Save Last credits */
 971                 lastCredits = edge_port->txCredits;
 972
 973                 /* Did we get our Chase response */
 974                 if (!edge_port->chaseResponsePending) {
 975                         dev_dbg(dev, "%s - Got Chase Response\n", __func__);
 976
 977                         /* did we get all of our credit back? */
 978                         if (edge_port->txCredits == edge_port->maxTxCredits) {
 979                                 dev_dbg(dev, "%s - Got all credits\n", __func__);
 980                                 return;
 981                         }
 982                 }
 983
 984                 /* Block the thread for a while */
 985                 prepare_to_wait(&edge_port->wait_chase, &wait,
 986                                                 TASK_UNINTERRUPTIBLE);
 987                 schedule_timeout(timeout);
 988                 finish_wait(&edge_port->wait_chase, &wait);
 989
 990                 if (lastCredits == edge_port->txCredits) {
 991                         /* No activity.. count down. */
 992                         loop--;
 993                         if (loop == 0) {
 994                                 edge_port->chaseResponsePending = false;
 995                                 dev_dbg(dev, "%s - Chase TIMEOUT\n", __func__);
 996                                 return;
 997                         }
 998                 } else {
 999                         /* Reset timeout value back to 10 seconds */
1000                         dev_dbg(dev, "%s - Last %d, Current %d\n", __func__,
1001                                         lastCredits, edge_port->txCredits);
1002                         loop = 10;
1003                 }
1004         }
1005 }
1006
1007
1008 /************************************************************************
1009  *
1010  * block_until_tx_empty
1011  *
1012  *      This function will block the close until one of the following:
1013  *              1. TX count are 0
1014  *              2. The edgeport has stopped
1015  *              3. A timeout of 3 seconds without activity has expired
1016  *
1017  ************************************************************************/
1018 static void block_until_tx_empty(struct edgeport_port *edge_port)
1019 {
1020         struct device *dev = &edge_port->port->dev;
1021         DEFINE_WAIT(wait);
1022         struct TxFifo *fifo = &edge_port->txfifo;
1023         __u32 lastCount;
1024         int timeout = HZ/10;
1025         int loop = 30;
1026
1027         while (1) {
1028                 /* Save Last count */
1029                 lastCount = fifo->count;
1030
1031                 /* Is the Edgeport Buffer empty? */
1032                 if (lastCount == 0) {
1033                         dev_dbg(dev, "%s - TX Buffer Empty\n", __func__);
1034                         return;
1035                 }
1036
1037                 /* Block the thread for a while */
1038                 prepare_to_wait(&edge_port->wait_chase, &wait,
1039                                                 TASK_UNINTERRUPTIBLE);
1040                 schedule_timeout(timeout);
1041                 finish_wait(&edge_port->wait_chase, &wait);
1042
1043                 dev_dbg(dev, "%s wait\n", __func__);
1044
1045                 if (lastCount == fifo->count) {
1046                         /* No activity.. count down. */
1047                         loop--;
1048                         if (loop == 0) {
1049                                 dev_dbg(dev, "%s - TIMEOUT\n", __func__);
1050                                 return;
1051                         }
1052                 } else {
1053                         /* Reset timeout value back to seconds */
1054                         loop = 30;
1055                 }
1056         }
1057 }
1058
1059
1060 /*****************************************************************************
1061  * edge_close
1062  *      this function is called by the tty driver when a port is closed
1063  *****************************************************************************/
1064 static void edge_close(struct usb_serial_port *port)
1065 {
1066         struct edgeport_serial *edge_serial;
1067         struct edgeport_port *edge_port;
1068         int status;
1069
1070         edge_serial = usb_get_serial_data(port->serial);
1071         edge_port = usb_get_serial_port_data(port);
1072         if (edge_serial == NULL || edge_port == NULL)
1073                 return;
1074
1075         /* block until tx is empty */
1076         block_until_tx_empty(edge_port);
1077
1078         edge_port->closePending = true;
1079
1080         if ((!edge_serial->is_epic) ||
1081             ((edge_serial->is_epic) &&
1082              (edge_serial->epic_descriptor.Supports.IOSPChase))) {
1083                 /* flush and chase */
1084                 edge_port->chaseResponsePending = true;
1085
1086                 dev_dbg(&port->dev, "%s - Sending IOSP_CMD_CHASE_PORT\n", __func__);
1087                 status = send_iosp_ext_cmd(edge_port, IOSP_CMD_CHASE_PORT, 0);
1088                 if (status == 0)
1089                         /* block until chase finished */
1090                         block_until_chase_response(edge_port);
1091                 else
1092                         edge_port->chaseResponsePending = false;
1093         }
1094
1095         if ((!edge_serial->is_epic) ||
1096             ((edge_serial->is_epic) &&
1097              (edge_serial->epic_descriptor.Supports.IOSPClose))) {
1098                /* close the port */
1099                 dev_dbg(&port->dev, "%s - Sending IOSP_CMD_CLOSE_PORT\n", __func__);
1100                 send_iosp_ext_cmd(edge_port, IOSP_CMD_CLOSE_PORT, 0);
1101         }
1102
1103         /* port->close = true; */
1104         edge_port->closePending = false;
1105         edge_port->open = false;
1106         edge_port->openPending = false;
1107
1108         usb_kill_urb(edge_port->write_urb);
1109
1110         if (edge_port->write_urb) {
1111                 /* if this urb had a transfer buffer already
1112                                 (old transfer) free it */
1113                 kfree(edge_port->write_urb->transfer_buffer);
1114                 usb_free_urb(edge_port->write_urb);
1115                 edge_port->write_urb = NULL;
1116         }
1117         kfree(edge_port->txfifo.fifo);
1118         edge_port->txfifo.fifo = NULL;
1119 }
1120
1121 /*****************************************************************************
1122  * SerialWrite
1123  *      this function is called by the tty driver when data should be written
1124  *      to the port.
1125  *      If successful, we return the number of bytes written, otherwise we
1126  *      return a negative error number.
1127  *****************************************************************************/
1128 static int edge_write(struct tty_struct *tty, struct usb_serial_port *port,
1129                                         const unsigned char *data, int count)
1130 {
1131         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1132         struct TxFifo *fifo;
1133         int copySize;
1134         int bytesleft;
1135         int firsthalf;
1136         int secondhalf;
1137         unsigned long flags;
1138
1139         if (edge_port == NULL)
1140                 return -ENODEV;
1141
1142         /* get a pointer to the Tx fifo */
1143         fifo = &edge_port->txfifo;
1144
1145         spin_lock_irqsave(&edge_port->ep_lock, flags);
1146
1147         /* calculate number of bytes to put in fifo */
1148         copySize = min((unsigned int)count,
1149                                 (edge_port->txCredits - fifo->count));
1150
1151         dev_dbg(&port->dev, "%s(%d) of %d byte(s) Fifo room  %d -- will copy %d bytes\n",
1152                 __func__, port->number, count,
1153                         edge_port->txCredits - fifo->count, copySize);
1154
1155         /* catch writes of 0 bytes which the tty driver likes to give us,
1156            and when txCredits is empty */
1157         if (copySize == 0) {
1158                 dev_dbg(&port->dev, "%s - copySize = Zero\n", __func__);
1159                 goto finish_write;
1160         }
1161
1162         /* queue the data
1163          * since we can never overflow the buffer we do not have to check for a
1164          * full condition
1165          *
1166          * the copy is done is two parts -- first fill to the end of the buffer
1167          * then copy the reset from the start of the buffer
1168          */
1169         bytesleft = fifo->size - fifo->head;
1170         firsthalf = min(bytesleft, copySize);
1171         dev_dbg(&port->dev, "%s - copy %d bytes of %d into fifo \n", __func__,
1172                 firsthalf, bytesleft);
1173
1174         /* now copy our data */
1175         memcpy(&fifo->fifo[fifo->head], data, firsthalf);
1176         usb_serial_debug_data(&port->dev, __func__, firsthalf, &fifo->fifo[fifo->head]);
1177
1178         /* update the index and size */
1179         fifo->head  += firsthalf;
1180         fifo->count += firsthalf;
1181
1182         /* wrap the index */
1183         if (fifo->head == fifo->size)
1184                 fifo->head = 0;
1185
1186         secondhalf = copySize-firsthalf;
1187
1188         if (secondhalf) {
1189                 dev_dbg(&port->dev, "%s - copy rest of data %d\n", __func__, secondhalf);
1190                 memcpy(&fifo->fifo[fifo->head], &data[firsthalf], secondhalf);
1191                 usb_serial_debug_data(&port->dev, __func__, secondhalf, &fifo->fifo[fifo->head]);
1192                 /* update the index and size */
1193                 fifo->count += secondhalf;
1194                 fifo->head  += secondhalf;
1195                 /* No need to check for wrap since we can not get to end of
1196                  * the fifo in this part
1197                  */
1198         }
1199
1200 finish_write:
1201         spin_unlock_irqrestore(&edge_port->ep_lock, flags);
1202
1203         send_more_port_data((struct edgeport_serial *)
1204                         usb_get_serial_data(port->serial), edge_port);
1205
1206         dev_dbg(&port->dev, "%s wrote %d byte(s) TxCredits %d, Fifo %d\n",
1207                 __func__, copySize, edge_port->txCredits, fifo->count);
1208
1209         return copySize;
1210 }
1211
1212
1213 /************************************************************************
1214  *
1215  * send_more_port_data()
1216  *
1217  *      This routine attempts to write additional UART transmit data
1218  *      to a port over the USB bulk pipe. It is called (1) when new
1219  *      data has been written to a port's TxBuffer from higher layers
1220  *      (2) when the peripheral sends us additional TxCredits indicating
1221  *      that it can accept more Tx data for a given port; and (3) when
1222  *      a bulk write completes successfully and we want to see if we
1223  *      can transmit more.
1224  *
1225  ************************************************************************/
1226 static void send_more_port_data(struct edgeport_serial *edge_serial,
1227                                         struct edgeport_port *edge_port)
1228 {
1229         struct TxFifo   *fifo = &edge_port->txfifo;
1230         struct device   *dev = &edge_port->port->dev;
1231         struct urb      *urb;
1232         unsigned char   *buffer;
1233         int             status;
1234         int             count;
1235         int             bytesleft;
1236         int             firsthalf;
1237         int             secondhalf;
1238         unsigned long   flags;
1239
1240         spin_lock_irqsave(&edge_port->ep_lock, flags);
1241
1242         if (edge_port->write_in_progress ||
1243             !edge_port->open             ||
1244             (fifo->count == 0)) {
1245                 dev_dbg(dev, "%s(%d) EXIT - fifo %d, PendingWrite = %d\n",
1246                         __func__, edge_port->port->number,
1247                         fifo->count, edge_port->write_in_progress);
1248                 goto exit_send;
1249         }
1250
1251         /* since the amount of data in the fifo will always fit into the
1252          * edgeport buffer we do not need to check the write length
1253          *
1254          * Do we have enough credits for this port to make it worthwhile
1255          * to bother queueing a write. If it's too small, say a few bytes,
1256          * it's better to wait for more credits so we can do a larger write.
1257          */
1258         if (edge_port->txCredits < EDGE_FW_GET_TX_CREDITS_SEND_THRESHOLD(edge_port->maxTxCredits, EDGE_FW_BULK_MAX_PACKET_SIZE)) {
1259                 dev_dbg(dev, "%s(%d) Not enough credit - fifo %d TxCredit %d\n",
1260                         __func__, edge_port->port->number, fifo->count,
1261                         edge_port->txCredits);
1262                 goto exit_send;
1263         }
1264
1265         /* lock this write */
1266         edge_port->write_in_progress = true;
1267
1268         /* get a pointer to the write_urb */
1269         urb = edge_port->write_urb;
1270
1271         /* make sure transfer buffer is freed */
1272         kfree(urb->transfer_buffer);
1273         urb->transfer_buffer = NULL;
1274
1275         /* build the data header for the buffer and port that we are about
1276            to send out */
1277         count = fifo->count;
1278         buffer = kmalloc(count+2, GFP_ATOMIC);
1279         if (buffer == NULL) {
1280                 dev_err_console(edge_port->port,
1281                                 "%s - no more kernel memory...\n", __func__);
1282                 edge_port->write_in_progress = false;
1283                 goto exit_send;
1284         }
1285         buffer[0] = IOSP_BUILD_DATA_HDR1(edge_port->port->number
1286                                 - edge_port->port->serial->minor, count);
1287         buffer[1] = IOSP_BUILD_DATA_HDR2(edge_port->port->number
1288                                 - edge_port->port->serial->minor, count);
1289
1290         /* now copy our data */
1291         bytesleft =  fifo->size - fifo->tail;
1292         firsthalf = min(bytesleft, count);
1293         memcpy(&buffer[2], &fifo->fifo[fifo->tail], firsthalf);
1294         fifo->tail  += firsthalf;
1295         fifo->count -= firsthalf;
1296         if (fifo->tail == fifo->size)
1297                 fifo->tail = 0;
1298
1299         secondhalf = count-firsthalf;
1300         if (secondhalf) {
1301                 memcpy(&buffer[2+firsthalf], &fifo->fifo[fifo->tail],
1302                                                                 secondhalf);
1303                 fifo->tail  += secondhalf;
1304                 fifo->count -= secondhalf;
1305         }
1306
1307         if (count)
1308                 usb_serial_debug_data(&edge_port->port->dev, __func__, count, &buffer[2]);
1309
1310         /* fill up the urb with all of our data and submit it */
1311         usb_fill_bulk_urb(urb, edge_serial->serial->dev,
1312                         usb_sndbulkpipe(edge_serial->serial->dev,
1313                                         edge_serial->bulk_out_endpoint),
1314                         buffer, count+2,
1315                         edge_bulk_out_data_callback, edge_port);
1316
1317         /* decrement the number of credits we have by the number we just sent */
1318         edge_port->txCredits -= count;
1319         edge_port->icount.tx += count;
1320
1321         status = usb_submit_urb(urb, GFP_ATOMIC);
1322         if (status) {
1323                 /* something went wrong */
1324                 dev_err_console(edge_port->port,
1325                         "%s - usb_submit_urb(write bulk) failed, status = %d, data lost\n",
1326                                 __func__, status);
1327                 edge_port->write_in_progress = false;
1328
1329                 /* revert the credits as something bad happened. */
1330                 edge_port->txCredits += count;
1331                 edge_port->icount.tx -= count;
1332         }
1333         dev_dbg(dev, "%s wrote %d byte(s) TxCredit %d, Fifo %d\n",
1334                 __func__, count, edge_port->txCredits, fifo->count);
1335
1336 exit_send:
1337         spin_unlock_irqrestore(&edge_port->ep_lock, flags);
1338 }
1339
1340
1341 /*****************************************************************************
1342  * edge_write_room
1343  *      this function is called by the tty driver when it wants to know how
1344  *      many bytes of data we can accept for a specific port. If successful,
1345  *      we return the amount of room that we have for this port (the txCredits)
1346  *      otherwise we return a negative error number.
1347  *****************************************************************************/
1348 static int edge_write_room(struct tty_struct *tty)
1349 {
1350         struct usb_serial_port *port = tty->driver_data;
1351         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1352         int room;
1353         unsigned long flags;
1354
1355         if (edge_port == NULL)
1356                 return 0;
1357         if (edge_port->closePending)
1358                 return 0;
1359
1360         if (!edge_port->open) {
1361                 dev_dbg(&port->dev, "%s - port not opened\n", __func__);
1362                 return 0;
1363         }
1364
1365         /* total of both buffers is still txCredit */
1366         spin_lock_irqsave(&edge_port->ep_lock, flags);
1367         room = edge_port->txCredits - edge_port->txfifo.count;
1368         spin_unlock_irqrestore(&edge_port->ep_lock, flags);
1369
1370         dev_dbg(&port->dev, "%s - returns %d\n", __func__, room);
1371         return room;
1372 }
1373
1374
1375 /*****************************************************************************
1376  * edge_chars_in_buffer
1377  *      this function is called by the tty driver when it wants to know how
1378  *      many bytes of data we currently have outstanding in the port (data that
1379  *      has been written, but hasn't made it out the port yet)
1380  *      If successful, we return the number of bytes left to be written in the
1381  *      system,
1382  *      Otherwise we return a negative error number.
1383  *****************************************************************************/
1384 static int edge_chars_in_buffer(struct tty_struct *tty)
1385 {
1386         struct usb_serial_port *port = tty->driver_data;
1387         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1388         int num_chars;
1389         unsigned long flags;
1390
1391         if (edge_port == NULL)
1392                 return 0;
1393         if (edge_port->closePending)
1394                 return 0;
1395
1396         if (!edge_port->open) {
1397                 dev_dbg(&port->dev, "%s - port not opened\n", __func__);
1398                 return 0;
1399         }
1400
1401         spin_lock_irqsave(&edge_port->ep_lock, flags);
1402         num_chars = edge_port->maxTxCredits - edge_port->txCredits +
1403                                                 edge_port->txfifo.count;
1404         spin_unlock_irqrestore(&edge_port->ep_lock, flags);
1405         if (num_chars) {
1406                 dev_dbg(&port->dev, "%s(port %d) - returns %d\n", __func__,
1407                         port->number, num_chars);
1408         }
1409
1410         return num_chars;
1411 }
1412
1413
1414 /*****************************************************************************
1415  * SerialThrottle
1416  *      this function is called by the tty driver when it wants to stop the data
1417  *      being read from the port.
1418  *****************************************************************************/
1419 static void edge_throttle(struct tty_struct *tty)
1420 {
1421         struct usb_serial_port *port = tty->driver_data;
1422         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1423         int status;
1424
1425         if (edge_port == NULL)
1426                 return;
1427
1428         if (!edge_port->open) {
1429                 dev_dbg(&port->dev, "%s - port not opened\n", __func__);
1430                 return;
1431         }
1432
1433         /* if we are implementing XON/XOFF, send the stop character */
1434         if (I_IXOFF(tty)) {
1435                 unsigned char stop_char = STOP_CHAR(tty);
1436                 status = edge_write(tty, port, &stop_char, 1);
1437                 if (status <= 0)
1438                         return;
1439         }
1440
1441         /* if we are implementing RTS/CTS, toggle that line */
1442         if (tty->termios.c_cflag & CRTSCTS) {
1443                 edge_port->shadowMCR &= ~MCR_RTS;
1444                 status = send_cmd_write_uart_register(edge_port, MCR,
1445                                                         edge_port->shadowMCR);
1446                 if (status != 0)
1447                         return;
1448         }
1449 }
1450
1451
1452 /*****************************************************************************
1453  * edge_unthrottle
1454  *      this function is called by the tty driver when it wants to resume the
1455  *      data being read from the port (called after SerialThrottle is called)
1456  *****************************************************************************/
1457 static void edge_unthrottle(struct tty_struct *tty)
1458 {
1459         struct usb_serial_port *port = tty->driver_data;
1460         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1461         int status;
1462
1463         if (edge_port == NULL)
1464                 return;
1465
1466         if (!edge_port->open) {
1467                 dev_dbg(&port->dev, "%s - port not opened\n", __func__);
1468                 return;
1469         }
1470
1471         /* if we are implementing XON/XOFF, send the start character */
1472         if (I_IXOFF(tty)) {
1473                 unsigned char start_char = START_CHAR(tty);
1474                 status = edge_write(tty, port, &start_char, 1);
1475                 if (status <= 0)
1476                         return;
1477         }
1478         /* if we are implementing RTS/CTS, toggle that line */
1479         if (tty->termios.c_cflag & CRTSCTS) {
1480                 edge_port->shadowMCR |= MCR_RTS;
1481                 send_cmd_write_uart_register(edge_port, MCR,
1482                                                 edge_port->shadowMCR);
1483         }
1484 }
1485
1486
1487 /*****************************************************************************
1488  * SerialSetTermios
1489  *      this function is called by the tty driver when it wants to change
1490  * the termios structure
1491  *****************************************************************************/
1492 static void edge_set_termios(struct tty_struct *tty,
1493         struct usb_serial_port *port, struct ktermios *old_termios)
1494 {
1495         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1496         unsigned int cflag;
1497
1498         cflag = tty->termios.c_cflag;
1499         dev_dbg(&port->dev, "%s - clfag %08x iflag %08x\n", __func__, tty->termios.c_cflag, tty->termios.c_iflag);
1500         dev_dbg(&port->dev, "%s - old clfag %08x old iflag %08x\n", __func__, old_termios->c_cflag, old_termios->c_iflag);
1501
1502         if (edge_port == NULL)
1503                 return;
1504
1505         if (!edge_port->open) {
1506                 dev_dbg(&port->dev, "%s - port not opened\n", __func__);
1507                 return;
1508         }
1509
1510         /* change the port settings to the new ones specified */
1511         change_port_settings(tty, edge_port, old_termios);
1512 }
1513
1514
1515 /*****************************************************************************
1516  * get_lsr_info - get line status register info
1517  *
1518  * Purpose: Let user call ioctl() to get info when the UART physically
1519  *          is emptied.  On bus types like RS485, the transmitter must
1520  *          release the bus after transmitting. This must be done when
1521  *          the transmit shift register is empty, not be done when the
1522  *          transmit holding register is empty.  This functionality
1523  *          allows an RS485 driver to be written in user space.
1524  *****************************************************************************/
1525 static int get_lsr_info(struct edgeport_port *edge_port,
1526                                                 unsigned int __user *value)
1527 {
1528         unsigned int result = 0;
1529         unsigned long flags;
1530
1531         spin_lock_irqsave(&edge_port->ep_lock, flags);
1532         if (edge_port->maxTxCredits == edge_port->txCredits &&
1533             edge_port->txfifo.count == 0) {
1534                 dev_dbg(&edge_port->port->dev, "%s -- Empty\n", __func__);
1535                 result = TIOCSER_TEMT;
1536         }
1537         spin_unlock_irqrestore(&edge_port->ep_lock, flags);
1538
1539         if (copy_to_user(value, &result, sizeof(int)))
1540                 return -EFAULT;
1541         return 0;
1542 }
1543
1544 static int edge_tiocmset(struct tty_struct *tty,
1545                                         unsigned int set, unsigned int clear)
1546 {
1547         struct usb_serial_port *port = tty->driver_data;
1548         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1549         unsigned int mcr;
1550
1551         mcr = edge_port->shadowMCR;
1552         if (set & TIOCM_RTS)
1553                 mcr |= MCR_RTS;
1554         if (set & TIOCM_DTR)
1555                 mcr |= MCR_DTR;
1556         if (set & TIOCM_LOOP)
1557                 mcr |= MCR_LOOPBACK;
1558
1559         if (clear & TIOCM_RTS)
1560                 mcr &= ~MCR_RTS;
1561         if (clear & TIOCM_DTR)
1562                 mcr &= ~MCR_DTR;
1563         if (clear & TIOCM_LOOP)
1564                 mcr &= ~MCR_LOOPBACK;
1565
1566         edge_port->shadowMCR = mcr;
1567
1568         send_cmd_write_uart_register(edge_port, MCR, edge_port->shadowMCR);
1569
1570         return 0;
1571 }
1572
1573 static int edge_tiocmget(struct tty_struct *tty)
1574 {
1575         struct usb_serial_port *port = tty->driver_data;
1576         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1577         unsigned int result = 0;
1578         unsigned int msr;
1579         unsigned int mcr;
1580
1581         msr = edge_port->shadowMSR;
1582         mcr = edge_port->shadowMCR;
1583         result = ((mcr & MCR_DTR)       ? TIOCM_DTR: 0)   /* 0x002 */
1584                   | ((mcr & MCR_RTS)    ? TIOCM_RTS: 0)   /* 0x004 */
1585                   | ((msr & EDGEPORT_MSR_CTS)   ? TIOCM_CTS: 0)   /* 0x020 */
1586                   | ((msr & EDGEPORT_MSR_CD)    ? TIOCM_CAR: 0)   /* 0x040 */
1587                   | ((msr & EDGEPORT_MSR_RI)    ? TIOCM_RI:  0)   /* 0x080 */
1588                   | ((msr & EDGEPORT_MSR_DSR)   ? TIOCM_DSR: 0);  /* 0x100 */
1589
1590         return result;
1591 }
1592
1593 static int edge_get_icount(struct tty_struct *tty,
1594                                 struct serial_icounter_struct *icount)
1595 {
1596         struct usb_serial_port *port = tty->driver_data;
1597         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1598         struct async_icount cnow;
1599         cnow = edge_port->icount;
1600
1601         icount->cts = cnow.cts;
1602         icount->dsr = cnow.dsr;
1603         icount->rng = cnow.rng;
1604         icount->dcd = cnow.dcd;
1605         icount->rx = cnow.rx;
1606         icount->tx = cnow.tx;
1607         icount->frame = cnow.frame;
1608         icount->overrun = cnow.overrun;
1609         icount->parity = cnow.parity;
1610         icount->brk = cnow.brk;
1611         icount->buf_overrun = cnow.buf_overrun;
1612
1613         dev_dbg(&port->dev, "%s (%d) TIOCGICOUNT RX=%d, TX=%d\n", __func__,
1614                 port->number, icount->rx, icount->tx);
1615         return 0;
1616 }
1617
1618 static int get_serial_info(struct edgeport_port *edge_port,
1619                                 struct serial_struct __user *retinfo)
1620 {
1621         struct serial_struct tmp;
1622
1623         if (!retinfo)
1624                 return -EFAULT;
1625
1626         memset(&tmp, 0, sizeof(tmp));
1627
1628         tmp.type                = PORT_16550A;
1629         tmp.line                = edge_port->port->serial->minor;
1630         tmp.port                = edge_port->port->number;
1631         tmp.irq                 = 0;
1632         tmp.flags               = ASYNC_SKIP_TEST | ASYNC_AUTO_IRQ;
1633         tmp.xmit_fifo_size      = edge_port->maxTxCredits;
1634         tmp.baud_base           = 9600;
1635         tmp.close_delay         = 5*HZ;
1636         tmp.closing_wait        = 30*HZ;
1637
1638         if (copy_to_user(retinfo, &tmp, sizeof(*retinfo)))
1639                 return -EFAULT;
1640         return 0;
1641 }
1642
1643
1644 /*****************************************************************************
1645  * SerialIoctl
1646  *      this function handles any ioctl calls to the driver
1647  *****************************************************************************/
1648 static int edge_ioctl(struct tty_struct *tty,
1649                                         unsigned int cmd, unsigned long arg)
1650 {
1651         struct usb_serial_port *port = tty->driver_data;
1652         DEFINE_WAIT(wait);
1653         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1654         struct async_icount cnow;
1655         struct async_icount cprev;
1656
1657         dev_dbg(&port->dev, "%s - port %d, cmd = 0x%x\n", __func__, port->number, cmd);
1658
1659         switch (cmd) {
1660         case TIOCSERGETLSR:
1661                 dev_dbg(&port->dev, "%s (%d) TIOCSERGETLSR\n", __func__,  port->number);
1662                 return get_lsr_info(edge_port, (unsigned int __user *) arg);
1663
1664         case TIOCGSERIAL:
1665                 dev_dbg(&port->dev, "%s (%d) TIOCGSERIAL\n", __func__,  port->number);
1666                 return get_serial_info(edge_port, (struct serial_struct __user *) arg);
1667
1668         case TIOCMIWAIT:
1669                 dev_dbg(&port->dev, "%s (%d) TIOCMIWAIT\n", __func__,  port->number);
1670                 cprev = edge_port->icount;
1671                 while (1) {
1672                         prepare_to_wait(&edge_port->delta_msr_wait,
1673                                                 &wait, TASK_INTERRUPTIBLE);
1674                         schedule();
1675                         finish_wait(&edge_port->delta_msr_wait, &wait);
1676                         /* see if a signal did it */
1677                         if (signal_pending(current))
1678                                 return -ERESTARTSYS;
1679                         cnow = edge_port->icount;
1680                         if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr &&
1681                             cnow.dcd == cprev.dcd && cnow.cts == cprev.cts)
1682                                 return -EIO; /* no change => error */
1683                         if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
1684                             ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
1685                             ((arg & TIOCM_CD)  && (cnow.dcd != cprev.dcd)) ||
1686                             ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts))) {
1687                                 return 0;
1688                         }
1689                         cprev = cnow;
1690                 }
1691                 /* NOTREACHED */
1692                 break;
1693
1694         }
1695         return -ENOIOCTLCMD;
1696 }
1697
1698
1699 /*****************************************************************************
1700  * SerialBreak
1701  *      this function sends a break to the port
1702  *****************************************************************************/
1703 static void edge_break(struct tty_struct *tty, int break_state)
1704 {
1705         struct usb_serial_port *port = tty->driver_data;
1706         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1707         struct edgeport_serial *edge_serial = usb_get_serial_data(port->serial);
1708         int status;
1709
1710         if ((!edge_serial->is_epic) ||
1711             ((edge_serial->is_epic) &&
1712              (edge_serial->epic_descriptor.Supports.IOSPChase))) {
1713                 /* flush and chase */
1714                 edge_port->chaseResponsePending = true;
1715
1716                 dev_dbg(&port->dev, "%s - Sending IOSP_CMD_CHASE_PORT\n", __func__);
1717                 status = send_iosp_ext_cmd(edge_port, IOSP_CMD_CHASE_PORT, 0);
1718                 if (status == 0) {
1719                         /* block until chase finished */
1720                         block_until_chase_response(edge_port);
1721                 } else {
1722                         edge_port->chaseResponsePending = false;
1723                 }
1724         }
1725
1726         if ((!edge_serial->is_epic) ||
1727             ((edge_serial->is_epic) &&
1728              (edge_serial->epic_descriptor.Supports.IOSPSetClrBreak))) {
1729                 if (break_state == -1) {
1730                         dev_dbg(&port->dev, "%s - Sending IOSP_CMD_SET_BREAK\n", __func__);
1731                         status = send_iosp_ext_cmd(edge_port,
1732                                                 IOSP_CMD_SET_BREAK, 0);
1733                 } else {
1734                         dev_dbg(&port->dev, "%s - Sending IOSP_CMD_CLEAR_BREAK\n", __func__);
1735                         status = send_iosp_ext_cmd(edge_port,
1736                                                 IOSP_CMD_CLEAR_BREAK, 0);
1737                 }
1738                 if (status)
1739                         dev_dbg(&port->dev, "%s - error sending break set/clear command.\n",
1740                                 __func__);
1741         }
1742 }
1743
1744
1745 /*****************************************************************************
1746  * process_rcvd_data
1747  *      this function handles the data received on the bulk in pipe.
1748  *****************************************************************************/
1749 static void process_rcvd_data(struct edgeport_serial *edge_serial,
1750                                 unsigned char *buffer, __u16 bufferLength)
1751 {
1752         struct device *dev = &edge_serial->serial->dev->dev;
1753         struct usb_serial_port *port;
1754         struct edgeport_port *edge_port;
1755         __u16 lastBufferLength;
1756         __u16 rxLen;
1757
1758         lastBufferLength = bufferLength + 1;
1759
1760         while (bufferLength > 0) {
1761                 /* failsafe incase we get a message that we don't understand */
1762                 if (lastBufferLength == bufferLength) {
1763                         dev_dbg(dev, "%s - stuck in loop, exiting it.\n", __func__);
1764                         break;
1765                 }
1766                 lastBufferLength = bufferLength;
1767
1768                 switch (edge_serial->rxState) {
1769                 case EXPECT_HDR1:
1770                         edge_serial->rxHeader1 = *buffer;
1771                         ++buffer;
1772                         --bufferLength;
1773
1774                         if (bufferLength == 0) {
1775                                 edge_serial->rxState = EXPECT_HDR2;
1776                                 break;
1777                         }
1778                         /* otherwise, drop on through */
1779                 case EXPECT_HDR2:
1780                         edge_serial->rxHeader2 = *buffer;
1781                         ++buffer;
1782                         --bufferLength;
1783
1784                         dev_dbg(dev, "%s - Hdr1=%02X Hdr2=%02X\n", __func__,
1785                                 edge_serial->rxHeader1, edge_serial->rxHeader2);
1786                         /* Process depending on whether this header is
1787                          * data or status */
1788
1789                         if (IS_CMD_STAT_HDR(edge_serial->rxHeader1)) {
1790                                 /* Decode this status header and go to
1791                                  * EXPECT_HDR1 (if we can process the status
1792                                  * with only 2 bytes), or go to EXPECT_HDR3 to
1793                                  * get the third byte. */
1794                                 edge_serial->rxPort =
1795                                     IOSP_GET_HDR_PORT(edge_serial->rxHeader1);
1796                                 edge_serial->rxStatusCode =
1797                                     IOSP_GET_STATUS_CODE(
1798                                                 edge_serial->rxHeader1);
1799
1800                                 if (!IOSP_STATUS_IS_2BYTE(
1801                                                 edge_serial->rxStatusCode)) {
1802                                         /* This status needs additional bytes.
1803                                          * Save what we have and then wait for
1804                                          * more data.
1805                                          */
1806                                         edge_serial->rxStatusParam
1807                                                 = edge_serial->rxHeader2;
1808                                         edge_serial->rxState = EXPECT_HDR3;
1809                                         break;
1810                                 }
1811                                 /* We have all the header bytes, process the
1812                                    status now */
1813                                 process_rcvd_status(edge_serial,
1814                                                 edge_serial->rxHeader2, 0);
1815                                 edge_serial->rxState = EXPECT_HDR1;
1816                                 break;
1817                         } else {
1818                                 edge_serial->rxPort =
1819                                     IOSP_GET_HDR_PORT(edge_serial->rxHeader1);
1820                                 edge_serial->rxBytesRemaining =
1821                                     IOSP_GET_HDR_DATA_LEN(
1822                                                 edge_serial->rxHeader1,
1823                                                 edge_serial->rxHeader2);
1824                                 dev_dbg(dev, "%s - Data for Port %u Len %u\n",
1825                                         __func__,
1826                                         edge_serial->rxPort,
1827                                         edge_serial->rxBytesRemaining);
1828
1829                                 /* ASSERT(DevExt->RxPort < DevExt->NumPorts);
1830                                  * ASSERT(DevExt->RxBytesRemaining <
1831                                  *              IOSP_MAX_DATA_LENGTH);
1832                                  */
1833
1834                                 if (bufferLength == 0) {
1835                                         edge_serial->rxState = EXPECT_DATA;
1836                                         break;
1837                                 }
1838                                 /* Else, drop through */
1839                         }
1840                 case EXPECT_DATA: /* Expect data */
1841                         if (bufferLength < edge_serial->rxBytesRemaining) {
1842                                 rxLen = bufferLength;
1843                                 /* Expect data to start next buffer */
1844                                 edge_serial->rxState = EXPECT_DATA;
1845                         } else {
1846                                 /* BufLen >= RxBytesRemaining */
1847                                 rxLen = edge_serial->rxBytesRemaining;
1848                                 /* Start another header next time */
1849                                 edge_serial->rxState = EXPECT_HDR1;
1850                         }
1851
1852                         bufferLength -= rxLen;
1853                         edge_serial->rxBytesRemaining -= rxLen;
1854
1855                         /* spit this data back into the tty driver if this
1856                            port is open */
1857                         if (rxLen) {
1858                                 port = edge_serial->serial->port[
1859                                                         edge_serial->rxPort];
1860                                 edge_port = usb_get_serial_port_data(port);
1861                                 if (edge_port->open) {
1862                                         dev_dbg(dev, "%s - Sending %d bytes to TTY for port %d\n",
1863                                                 __func__, rxLen,
1864                                                 edge_serial->rxPort);
1865                                         edge_tty_recv(edge_port->port, buffer,
1866                                                         rxLen);
1867                                         edge_port->icount.rx += rxLen;
1868                                 }
1869                                 buffer += rxLen;
1870                         }
1871                         break;
1872
1873                 case EXPECT_HDR3:       /* Expect 3rd byte of status header */
1874                         edge_serial->rxHeader3 = *buffer;
1875                         ++buffer;
1876                         --bufferLength;
1877
1878                         /* We have all the header bytes, process the
1879                            status now */
1880                         process_rcvd_status(edge_serial,
1881                                 edge_serial->rxStatusParam,
1882                                 edge_serial->rxHeader3);
1883                         edge_serial->rxState = EXPECT_HDR1;
1884                         break;
1885                 }
1886         }
1887 }
1888
1889
1890 /*****************************************************************************
1891  * process_rcvd_status
1892  *      this function handles the any status messages received on the
1893  *      bulk in pipe.
1894  *****************************************************************************/
1895 static void process_rcvd_status(struct edgeport_serial *edge_serial,
1896                                                 __u8 byte2, __u8 byte3)
1897 {
1898         struct usb_serial_port *port;
1899         struct edgeport_port *edge_port;
1900         struct tty_struct *tty;
1901         struct device *dev;
1902         __u8 code = edge_serial->rxStatusCode;
1903
1904         /* switch the port pointer to the one being currently talked about */
1905         port = edge_serial->serial->port[edge_serial->rxPort];
1906         edge_port = usb_get_serial_port_data(port);
1907         if (edge_port == NULL) {
1908                 dev_err(&edge_serial->serial->dev->dev,
1909                         "%s - edge_port == NULL for port %d\n",
1910                                         __func__, edge_serial->rxPort);
1911                 return;
1912         }
1913         dev = &port->dev;
1914
1915         if (code == IOSP_EXT_STATUS) {
1916                 switch (byte2) {
1917                 case IOSP_EXT_STATUS_CHASE_RSP:
1918                         /* we want to do EXT status regardless of port
1919                          * open/closed */
1920                         dev_dbg(dev, "%s - Port %u EXT CHASE_RSP Data = %02x\n",
1921                                 __func__, edge_serial->rxPort, byte3);
1922                         /* Currently, the only EXT_STATUS is Chase, so process
1923                          * here instead of one more call to one more subroutine
1924                          * If/when more EXT_STATUS, there'll be more work to do
1925                          * Also, we currently clear flag and close the port
1926                          * regardless of content of above's Byte3.
1927                          * We could choose to do something else when Byte3 says
1928                          * Timeout on Chase from Edgeport, like wait longer in
1929                          * block_until_chase_response, but for now we don't.
1930                          */
1931                         edge_port->chaseResponsePending = false;
1932                         wake_up(&edge_port->wait_chase);
1933                         return;
1934
1935                 case IOSP_EXT_STATUS_RX_CHECK_RSP:
1936                         dev_dbg(dev, "%s ========== Port %u CHECK_RSP Sequence = %02x =============\n",
1937                                 __func__, edge_serial->rxPort, byte3);
1938                         /* Port->RxCheckRsp = true; */
1939                         return;
1940                 }
1941         }
1942
1943         if (code == IOSP_STATUS_OPEN_RSP) {
1944                 edge_port->txCredits = GET_TX_BUFFER_SIZE(byte3);
1945                 edge_port->maxTxCredits = edge_port->txCredits;
1946                 dev_dbg(dev, "%s - Port %u Open Response Initial MSR = %02x TxBufferSize = %d\n",
1947                         __func__, edge_serial->rxPort, byte2, edge_port->txCredits);
1948                 handle_new_msr(edge_port, byte2);
1949
1950                 /* send the current line settings to the port so we are
1951                    in sync with any further termios calls */
1952                 tty = tty_port_tty_get(&edge_port->port->port);
1953                 if (tty) {
1954                         change_port_settings(tty,
1955                                 edge_port, &tty->termios);
1956                         tty_kref_put(tty);
1957                 }
1958
1959                 /* we have completed the open */
1960                 edge_port->openPending = false;
1961                 edge_port->open = true;
1962                 wake_up(&edge_port->wait_open);
1963                 return;
1964         }
1965
1966         /* If port is closed, silently discard all rcvd status. We can
1967          * have cases where buffered status is received AFTER the close
1968          * port command is sent to the Edgeport.
1969          */
1970         if (!edge_port->open || edge_port->closePending)
1971                 return;
1972
1973         switch (code) {
1974         /* Not currently sent by Edgeport */
1975         case IOSP_STATUS_LSR:
1976                 dev_dbg(dev, "%s - Port %u LSR Status = %02x\n",
1977                         __func__, edge_serial->rxPort, byte2);
1978                 handle_new_lsr(edge_port, false, byte2, 0);
1979                 break;
1980
1981         case IOSP_STATUS_LSR_DATA:
1982                 dev_dbg(dev, "%s - Port %u LSR Status = %02x, Data = %02x\n",
1983                         __func__, edge_serial->rxPort, byte2, byte3);
1984                 /* byte2 is LSR Register */
1985                 /* byte3 is broken data byte */
1986                 handle_new_lsr(edge_port, true, byte2, byte3);
1987                 break;
1988         /*
1989          *      case IOSP_EXT_4_STATUS:
1990          *              dev_dbg(dev, "%s - Port %u LSR Status = %02x Data = %02x\n",
1991          *                      __func__, edge_serial->rxPort, byte2, byte3);
1992          *              break;
1993          */
1994         case IOSP_STATUS_MSR:
1995                 dev_dbg(dev, "%s - Port %u MSR Status = %02x\n",
1996                         __func__, edge_serial->rxPort, byte2);
1997                 /*
1998                  * Process this new modem status and generate appropriate
1999                  * events, etc, based on the new status. This routine
2000                  * also saves the MSR in Port->ShadowMsr.
2001                  */
2002                 handle_new_msr(edge_port, byte2);
2003                 break;
2004
2005         default:
2006                 dev_dbg(dev, "%s - Unrecognized IOSP status code %u\n", __func__, code);
2007                 break;
2008         }
2009 }
2010
2011
2012 /*****************************************************************************
2013  * edge_tty_recv
2014  *      this function passes data on to the tty flip buffer
2015  *****************************************************************************/
2016 static void edge_tty_recv(struct usb_serial_port *port, unsigned char *data,
2017                 int length)
2018 {
2019         int cnt;
2020
2021         cnt = tty_insert_flip_string(&port->port, data, length);
2022         if (cnt < length) {
2023                 dev_err(&port->dev, "%s - dropping data, %d bytes lost\n",
2024                                 __func__, length - cnt);
2025         }
2026         data += cnt;
2027         length -= cnt;
2028
2029         tty_flip_buffer_push(&port->port);
2030 }
2031
2032
2033 /*****************************************************************************
2034  * handle_new_msr
2035  *      this function handles any change to the msr register for a port.
2036  *****************************************************************************/
2037 static void handle_new_msr(struct edgeport_port *edge_port, __u8 newMsr)
2038 {
2039         struct  async_icount *icount;
2040
2041         if (newMsr & (EDGEPORT_MSR_DELTA_CTS | EDGEPORT_MSR_DELTA_DSR |
2042                         EDGEPORT_MSR_DELTA_RI | EDGEPORT_MSR_DELTA_CD)) {
2043                 icount = &edge_port->icount;
2044
2045                 /* update input line counters */
2046                 if (newMsr & EDGEPORT_MSR_DELTA_CTS)
2047                         icount->cts++;
2048                 if (newMsr & EDGEPORT_MSR_DELTA_DSR)
2049                         icount->dsr++;
2050                 if (newMsr & EDGEPORT_MSR_DELTA_CD)
2051                         icount->dcd++;
2052                 if (newMsr & EDGEPORT_MSR_DELTA_RI)
2053                         icount->rng++;
2054                 wake_up_interruptible(&edge_port->delta_msr_wait);
2055         }
2056
2057         /* Save the new modem status */
2058         edge_port->shadowMSR = newMsr & 0xf0;
2059 }
2060
2061
2062 /*****************************************************************************
2063  * handle_new_lsr
2064  *      this function handles any change to the lsr register for a port.
2065  *****************************************************************************/
2066 static void handle_new_lsr(struct edgeport_port *edge_port, __u8 lsrData,
2067                                                         __u8 lsr, __u8 data)
2068 {
2069         __u8 newLsr = (__u8) (lsr & (__u8)
2070                 (LSR_OVER_ERR | LSR_PAR_ERR | LSR_FRM_ERR | LSR_BREAK));
2071         struct async_icount *icount;
2072
2073         edge_port->shadowLSR = lsr;
2074
2075         if (newLsr & LSR_BREAK) {
2076                 /*
2077                  * Parity and Framing errors only count if they
2078                  * occur exclusive of a break being
2079                  * received.
2080                  */
2081                 newLsr &= (__u8)(LSR_OVER_ERR | LSR_BREAK);
2082         }
2083
2084         /* Place LSR data byte into Rx buffer */
2085         if (lsrData)
2086                 edge_tty_recv(edge_port->port, &data, 1);
2087
2088         /* update input line counters */
2089         icount = &edge_port->icount;
2090         if (newLsr & LSR_BREAK)
2091                 icount->brk++;
2092         if (newLsr & LSR_OVER_ERR)
2093                 icount->overrun++;
2094         if (newLsr & LSR_PAR_ERR)
2095                 icount->parity++;
2096         if (newLsr & LSR_FRM_ERR)
2097                 icount->frame++;
2098 }
2099
2100
2101 /****************************************************************************
2102  * sram_write
2103  *      writes a number of bytes to the Edgeport device's sram starting at the
2104  *      given address.
2105  *      If successful returns the number of bytes written, otherwise it returns
2106  *      a negative error number of the problem.
2107  ****************************************************************************/
2108 static int sram_write(struct usb_serial *serial, __u16 extAddr, __u16 addr,
2109                                         __u16 length, const __u8 *data)
2110 {
2111         int result;
2112         __u16 current_length;
2113         unsigned char *transfer_buffer;
2114
2115         dev_dbg(&serial->dev->dev, "%s - %x, %x, %d\n", __func__, extAddr, addr, length);
2116
2117         transfer_buffer =  kmalloc(64, GFP_KERNEL);
2118         if (!transfer_buffer) {
2119                 dev_err(&serial->dev->dev, "%s - kmalloc(%d) failed.\n",
2120                                                         __func__, 64);
2121                 return -ENOMEM;
2122         }
2123
2124         /* need to split these writes up into 64 byte chunks */
2125         result = 0;
2126         while (length > 0) {
2127                 if (length > 64)
2128                         current_length = 64;
2129                 else
2130                         current_length = length;
2131
2132 /*              dev_dbg(&serial->dev->dev, "%s - writing %x, %x, %d\n", __func__, extAddr, addr, current_length); */
2133                 memcpy(transfer_buffer, data, current_length);
2134                 result = usb_control_msg(serial->dev,
2135                                         usb_sndctrlpipe(serial->dev, 0),
2136                                         USB_REQUEST_ION_WRITE_RAM,
2137                                         0x40, addr, extAddr, transfer_buffer,
2138                                         current_length, 300);
2139                 if (result < 0)
2140                         break;
2141                 length -= current_length;
2142                 addr += current_length;
2143                 data += current_length;
2144         }
2145
2146         kfree(transfer_buffer);
2147         return result;
2148 }
2149
2150
2151 /****************************************************************************
2152  * rom_write
2153  *      writes a number of bytes to the Edgeport device's ROM starting at the
2154  *      given address.
2155  *      If successful returns the number of bytes written, otherwise it returns
2156  *      a negative error number of the problem.
2157  ****************************************************************************/
2158 static int rom_write(struct usb_serial *serial, __u16 extAddr, __u16 addr,
2159                                         __u16 length, const __u8 *data)
2160 {
2161         int result;
2162         __u16 current_length;
2163         unsigned char *transfer_buffer;
2164
2165         transfer_buffer =  kmalloc(64, GFP_KERNEL);
2166         if (!transfer_buffer) {
2167                 dev_err(&serial->dev->dev, "%s - kmalloc(%d) failed.\n",
2168                                                                 __func__, 64);
2169                 return -ENOMEM;
2170         }
2171
2172         /* need to split these writes up into 64 byte chunks */
2173         result = 0;
2174         while (length > 0) {
2175                 if (length > 64)
2176                         current_length = 64;
2177                 else
2178                         current_length = length;
2179                 memcpy(transfer_buffer, data, current_length);
2180                 result = usb_control_msg(serial->dev,
2181                                         usb_sndctrlpipe(serial->dev, 0),
2182                                         USB_REQUEST_ION_WRITE_ROM, 0x40,
2183                                         addr, extAddr,
2184                                         transfer_buffer, current_length, 300);
2185                 if (result < 0)
2186                         break;
2187                 length -= current_length;
2188                 addr += current_length;
2189                 data += current_length;
2190         }
2191
2192         kfree(transfer_buffer);
2193         return result;
2194 }
2195
2196
2197 /****************************************************************************
2198  * rom_read
2199  *      reads a number of bytes from the Edgeport device starting at the given
2200  *      address.
2201  *      If successful returns the number of bytes read, otherwise it returns
2202  *      a negative error number of the problem.
2203  ****************************************************************************/
2204 static int rom_read(struct usb_serial *serial, __u16 extAddr,
2205                                         __u16 addr, __u16 length, __u8 *data)
2206 {
2207         int result;
2208         __u16 current_length;
2209         unsigned char *transfer_buffer;
2210
2211         transfer_buffer =  kmalloc(64, GFP_KERNEL);
2212         if (!transfer_buffer) {
2213                 dev_err(&serial->dev->dev,
2214                         "%s - kmalloc(%d) failed.\n", __func__, 64);
2215                 return -ENOMEM;
2216         }
2217
2218         /* need to split these reads up into 64 byte chunks */
2219         result = 0;
2220         while (length > 0) {
2221                 if (length > 64)
2222                         current_length = 64;
2223                 else
2224                         current_length = length;
2225                 result = usb_control_msg(serial->dev,
2226                                         usb_rcvctrlpipe(serial->dev, 0),
2227                                         USB_REQUEST_ION_READ_ROM,
2228                                         0xC0, addr, extAddr, transfer_buffer,
2229                                         current_length, 300);
2230                 if (result < 0)
2231                         break;
2232                 memcpy(data, transfer_buffer, current_length);
2233                 length -= current_length;
2234                 addr += current_length;
2235                 data += current_length;
2236         }
2237
2238         kfree(transfer_buffer);
2239         return result;
2240 }
2241
2242
2243 /****************************************************************************
2244  * send_iosp_ext_cmd
2245  *      Is used to send a IOSP message to the Edgeport device
2246  ****************************************************************************/
2247 static int send_iosp_ext_cmd(struct edgeport_port *edge_port,
2248                                                 __u8 command, __u8 param)
2249 {
2250         unsigned char   *buffer;
2251         unsigned char   *currentCommand;
2252         int             length = 0;
2253         int             status = 0;
2254
2255         buffer = kmalloc(10, GFP_ATOMIC);
2256         if (!buffer) {
2257                 dev_err(&edge_port->port->dev,
2258                                 "%s - kmalloc(%d) failed.\n", __func__, 10);
2259                 return -ENOMEM;
2260         }
2261
2262         currentCommand = buffer;
2263
2264         MAKE_CMD_EXT_CMD(&currentCommand, &length,
2265                 edge_port->port->number - edge_port->port->serial->minor,
2266                 command, param);
2267
2268         status = write_cmd_usb(edge_port, buffer, length);
2269         if (status) {
2270                 /* something bad happened, let's free up the memory */
2271                 kfree(buffer);
2272         }
2273
2274         return status;
2275 }
2276
2277
2278 /*****************************************************************************
2279  * write_cmd_usb
2280  *      this function writes the given buffer out to the bulk write endpoint.
2281  *****************************************************************************/
2282 static int write_cmd_usb(struct edgeport_port *edge_port,
2283                                         unsigned char *buffer, int length)
2284 {
2285         struct edgeport_serial *edge_serial =
2286                                 usb_get_serial_data(edge_port->port->serial);
2287         struct device *dev = &edge_port->port->dev;
2288         int status = 0;
2289         struct urb *urb;
2290
2291         usb_serial_debug_data(dev, __func__, length, buffer);
2292
2293         /* Allocate our next urb */
2294         urb = usb_alloc_urb(0, GFP_ATOMIC);
2295         if (!urb)
2296                 return -ENOMEM;
2297
2298         atomic_inc(&CmdUrbs);
2299         dev_dbg(dev, "%s - ALLOCATE URB %p (outstanding %d)\n",
2300                 __func__, urb, atomic_read(&CmdUrbs));
2301
2302         usb_fill_bulk_urb(urb, edge_serial->serial->dev,
2303                         usb_sndbulkpipe(edge_serial->serial->dev,
2304                                         edge_serial->bulk_out_endpoint),
2305                         buffer, length, edge_bulk_out_cmd_callback, edge_port);
2306
2307         edge_port->commandPending = true;
2308         status = usb_submit_urb(urb, GFP_ATOMIC);
2309
2310         if (status) {
2311                 /* something went wrong */
2312                 dev_err(dev, "%s - usb_submit_urb(write command) failed, status = %d\n",
2313                         __func__, status);
2314                 usb_kill_urb(urb);
2315                 usb_free_urb(urb);
2316                 atomic_dec(&CmdUrbs);
2317                 return status;
2318         }
2319
2320 #if 0
2321         wait_event(&edge_port->wait_command, !edge_port->commandPending);
2322
2323         if (edge_port->commandPending) {
2324                 /* command timed out */
2325                 dev_dbg(dev, "%s - command timed out\n", __func__);
2326                 status = -EINVAL;
2327         }
2328 #endif
2329         return status;
2330 }
2331
2332
2333 /*****************************************************************************
2334  * send_cmd_write_baud_rate
2335  *      this function sends the proper command to change the baud rate of the
2336  *      specified port.
2337  *****************************************************************************/
2338 static int send_cmd_write_baud_rate(struct edgeport_port *edge_port,
2339                                                                 int baudRate)
2340 {
2341         struct edgeport_serial *edge_serial =
2342                                 usb_get_serial_data(edge_port->port->serial);
2343         struct device *dev = &edge_port->port->dev;
2344         unsigned char *cmdBuffer;
2345         unsigned char *currCmd;
2346         int cmdLen = 0;
2347         int divisor;
2348         int status;
2349         unsigned char number =
2350                 edge_port->port->number - edge_port->port->serial->minor;
2351
2352         if (edge_serial->is_epic &&
2353             !edge_serial->epic_descriptor.Supports.IOSPSetBaudRate) {
2354                 dev_dbg(dev, "SendCmdWriteBaudRate - NOT Setting baud rate for port = %d, baud = %d\n",
2355                         edge_port->port->number, baudRate);
2356                 return 0;
2357         }
2358
2359         dev_dbg(dev, "%s - port = %d, baud = %d\n", __func__,
2360                 edge_port->port->number, baudRate);
2361
2362         status = calc_baud_rate_divisor(dev, baudRate, &divisor);
2363         if (status) {
2364                 dev_err(dev, "%s - bad baud rate\n", __func__);
2365                 return status;
2366         }
2367
2368         /* Alloc memory for the string of commands. */
2369         cmdBuffer =  kmalloc(0x100, GFP_ATOMIC);
2370         if (!cmdBuffer) {
2371                 dev_err(dev, "%s - kmalloc(%d) failed.\n", __func__, 0x100);
2372                 return -ENOMEM;
2373         }
2374         currCmd = cmdBuffer;
2375
2376         /* Enable access to divisor latch */
2377         MAKE_CMD_WRITE_REG(&currCmd, &cmdLen, number, LCR, LCR_DL_ENABLE);
2378
2379         /* Write the divisor itself */
2380         MAKE_CMD_WRITE_REG(&currCmd, &cmdLen, number, DLL, LOW8(divisor));
2381         MAKE_CMD_WRITE_REG(&currCmd, &cmdLen, number, DLM, HIGH8(divisor));
2382
2383         /* Restore original value to disable access to divisor latch */
2384         MAKE_CMD_WRITE_REG(&currCmd, &cmdLen, number, LCR,
2385                                                 edge_port->shadowLCR);
2386
2387         status = write_cmd_usb(edge_port, cmdBuffer, cmdLen);
2388         if (status) {
2389                 /* something bad happened, let's free up the memory */
2390                 kfree(cmdBuffer);
2391         }
2392
2393         return status;
2394 }
2395
2396
2397 /*****************************************************************************
2398  * calc_baud_rate_divisor
2399  *      this function calculates the proper baud rate divisor for the specified
2400  *      baud rate.
2401  *****************************************************************************/
2402 static int calc_baud_rate_divisor(struct device *dev, int baudrate, int *divisor)
2403 {
2404         int i;
2405         __u16 custom;
2406
2407         for (i = 0; i < ARRAY_SIZE(divisor_table); i++) {
2408                 if (divisor_table[i].BaudRate == baudrate) {
2409                         *divisor = divisor_table[i].Divisor;
2410                         return 0;
2411                 }
2412         }
2413
2414         /* We have tried all of the standard baud rates
2415          * lets try to calculate the divisor for this baud rate
2416          * Make sure the baud rate is reasonable */
2417         if (baudrate > 50 && baudrate < 230400) {
2418                 /* get divisor */
2419                 custom = (__u16)((230400L + baudrate/2) / baudrate);
2420
2421                 *divisor = custom;
2422
2423                 dev_dbg(dev, "%s - Baud %d = %d\n", __func__, baudrate, custom);
2424                 return 0;
2425         }
2426
2427         return -1;
2428 }
2429
2430
2431 /*****************************************************************************
2432  * send_cmd_write_uart_register
2433  *  this function builds up a uart register message and sends to the device.
2434  *****************************************************************************/
2435 static int send_cmd_write_uart_register(struct edgeport_port *edge_port,
2436                                                 __u8 regNum, __u8 regValue)
2437 {
2438         struct edgeport_serial *edge_serial =
2439                                 usb_get_serial_data(edge_port->port->serial);
2440         struct device *dev = &edge_port->port->dev;
2441         unsigned char *cmdBuffer;
2442         unsigned char *currCmd;
2443         unsigned long cmdLen = 0;
2444         int status;
2445
2446         dev_dbg(dev, "%s - write to %s register 0x%02x\n",
2447                 (regNum == MCR) ? "MCR" : "LCR", __func__, regValue);
2448
2449         if (edge_serial->is_epic &&
2450             !edge_serial->epic_descriptor.Supports.IOSPWriteMCR &&
2451             regNum == MCR) {
2452                 dev_dbg(dev, "SendCmdWriteUartReg - Not writing to MCR Register\n");
2453                 return 0;
2454         }
2455
2456         if (edge_serial->is_epic &&
2457             !edge_serial->epic_descriptor.Supports.IOSPWriteLCR &&
2458             regNum == LCR) {
2459                 dev_dbg(dev, "SendCmdWriteUartReg - Not writing to LCR Register\n");
2460                 return 0;
2461         }
2462
2463         /* Alloc memory for the string of commands. */
2464         cmdBuffer = kmalloc(0x10, GFP_ATOMIC);
2465         if (cmdBuffer == NULL)
2466                 return -ENOMEM;
2467
2468         currCmd = cmdBuffer;
2469
2470         /* Build a cmd in the buffer to write the given register */
2471         MAKE_CMD_WRITE_REG(&currCmd, &cmdLen,
2472                 edge_port->port->number - edge_port->port->serial->minor,
2473                 regNum, regValue);
2474
2475         status = write_cmd_usb(edge_port, cmdBuffer, cmdLen);
2476         if (status) {
2477                 /* something bad happened, let's free up the memory */
2478                 kfree(cmdBuffer);
2479         }
2480
2481         return status;
2482 }
2483
2484
2485 /*****************************************************************************
2486  * change_port_settings
2487  *      This routine is called to set the UART on the device to match the
2488  *      specified new settings.
2489  *****************************************************************************/
2490
2491 static void change_port_settings(struct tty_struct *tty,
2492         struct edgeport_port *edge_port, struct ktermios *old_termios)
2493 {
2494         struct device *dev = &edge_port->port->dev;
2495         struct edgeport_serial *edge_serial =
2496                         usb_get_serial_data(edge_port->port->serial);
2497         int baud;
2498         unsigned cflag;
2499         __u8 mask = 0xff;
2500         __u8 lData;
2501         __u8 lParity;
2502         __u8 lStop;
2503         __u8 rxFlow;
2504         __u8 txFlow;
2505         int status;
2506
2507         dev_dbg(dev, "%s - port %d\n", __func__, edge_port->port->number);
2508
2509         if (!edge_port->open &&
2510             !edge_port->openPending) {
2511                 dev_dbg(dev, "%s - port not opened\n", __func__);
2512                 return;
2513         }
2514
2515         cflag = tty->termios.c_cflag;
2516
2517         switch (cflag & CSIZE) {
2518         case CS5:
2519                 lData = LCR_BITS_5; mask = 0x1f;
2520                 dev_dbg(dev, "%s - data bits = 5\n", __func__);
2521                 break;
2522         case CS6:
2523                 lData = LCR_BITS_6; mask = 0x3f;
2524                 dev_dbg(dev, "%s - data bits = 6\n", __func__);
2525                 break;
2526         case CS7:
2527                 lData = LCR_BITS_7; mask = 0x7f;
2528                 dev_dbg(dev, "%s - data bits = 7\n", __func__);
2529                 break;
2530         default:
2531         case CS8:
2532                 lData = LCR_BITS_8;
2533                 dev_dbg(dev, "%s - data bits = 8\n", __func__);
2534                 break;
2535         }
2536
2537         lParity = LCR_PAR_NONE;
2538         if (cflag & PARENB) {
2539                 if (cflag & CMSPAR) {
2540                         if (cflag & PARODD) {
2541                                 lParity = LCR_PAR_MARK;
2542                                 dev_dbg(dev, "%s - parity = mark\n", __func__);
2543                         } else {
2544                                 lParity = LCR_PAR_SPACE;
2545                                 dev_dbg(dev, "%s - parity = space\n", __func__);
2546                         }
2547                 } else if (cflag & PARODD) {
2548                         lParity = LCR_PAR_ODD;
2549                         dev_dbg(dev, "%s - parity = odd\n", __func__);
2550                 } else {
2551                         lParity = LCR_PAR_EVEN;
2552                         dev_dbg(dev, "%s - parity = even\n", __func__);
2553                 }
2554         } else {
2555                 dev_dbg(dev, "%s - parity = none\n", __func__);
2556         }
2557
2558         if (cflag & CSTOPB) {
2559                 lStop = LCR_STOP_2;
2560                 dev_dbg(dev, "%s - stop bits = 2\n", __func__);
2561         } else {
2562                 lStop = LCR_STOP_1;
2563                 dev_dbg(dev, "%s - stop bits = 1\n", __func__);
2564         }
2565
2566         /* figure out the flow control settings */
2567         rxFlow = txFlow = 0x00;
2568         if (cflag & CRTSCTS) {
2569                 rxFlow |= IOSP_RX_FLOW_RTS;
2570                 txFlow |= IOSP_TX_FLOW_CTS;
2571                 dev_dbg(dev, "%s - RTS/CTS is enabled\n", __func__);
2572         } else {
2573                 dev_dbg(dev, "%s - RTS/CTS is disabled\n", __func__);
2574         }
2575
2576         /* if we are implementing XON/XOFF, set the start and stop character
2577            in the device */
2578         if (I_IXOFF(tty) || I_IXON(tty)) {
2579                 unsigned char stop_char  = STOP_CHAR(tty);
2580                 unsigned char start_char = START_CHAR(tty);
2581
2582                 if ((!edge_serial->is_epic) ||
2583                     ((edge_serial->is_epic) &&
2584                      (edge_serial->epic_descriptor.Supports.IOSPSetXChar))) {
2585                         send_iosp_ext_cmd(edge_port,
2586                                         IOSP_CMD_SET_XON_CHAR, start_char);
2587                         send_iosp_ext_cmd(edge_port,
2588                                         IOSP_CMD_SET_XOFF_CHAR, stop_char);
2589                 }
2590
2591                 /* if we are implementing INBOUND XON/XOFF */
2592                 if (I_IXOFF(tty)) {
2593                         rxFlow |= IOSP_RX_FLOW_XON_XOFF;
2594                         dev_dbg(dev, "%s - INBOUND XON/XOFF is enabled, XON = %2x, XOFF = %2x\n",
2595                                 __func__, start_char, stop_char);
2596                 } else {
2597                         dev_dbg(dev, "%s - INBOUND XON/XOFF is disabled\n", __func__);
2598                 }
2599
2600                 /* if we are implementing OUTBOUND XON/XOFF */
2601                 if (I_IXON(tty)) {
2602                         txFlow |= IOSP_TX_FLOW_XON_XOFF;
2603                         dev_dbg(dev, "%s - OUTBOUND XON/XOFF is enabled, XON = %2x, XOFF = %2x\n",
2604                                 __func__, start_char, stop_char);
2605                 } else {
2606                         dev_dbg(dev, "%s - OUTBOUND XON/XOFF is disabled\n", __func__);
2607                 }
2608         }
2609
2610         /* Set flow control to the configured value */
2611         if ((!edge_serial->is_epic) ||
2612             ((edge_serial->is_epic) &&
2613              (edge_serial->epic_descriptor.Supports.IOSPSetRxFlow)))
2614                 send_iosp_ext_cmd(edge_port, IOSP_CMD_SET_RX_FLOW, rxFlow);
2615         if ((!edge_serial->is_epic) ||
2616             ((edge_serial->is_epic) &&
2617              (edge_serial->epic_descriptor.Supports.IOSPSetTxFlow)))
2618                 send_iosp_ext_cmd(edge_port, IOSP_CMD_SET_TX_FLOW, txFlow);
2619
2620
2621         edge_port->shadowLCR &= ~(LCR_BITS_MASK | LCR_STOP_MASK | LCR_PAR_MASK);
2622         edge_port->shadowLCR |= (lData | lParity | lStop);
2623
2624         edge_port->validDataMask = mask;
2625
2626         /* Send the updated LCR value to the EdgePort */
2627         status = send_cmd_write_uart_register(edge_port, LCR,
2628                                                         edge_port->shadowLCR);
2629         if (status != 0)
2630                 return;
2631
2632         /* set up the MCR register and send it to the EdgePort */
2633         edge_port->shadowMCR = MCR_MASTER_IE;
2634         if (cflag & CBAUD)
2635                 edge_port->shadowMCR |= (MCR_DTR | MCR_RTS);
2636
2637         status = send_cmd_write_uart_register(edge_port, MCR,
2638                                                 edge_port->shadowMCR);
2639         if (status != 0)
2640                 return;
2641
2642         /* Determine divisor based on baud rate */
2643         baud = tty_get_baud_rate(tty);
2644         if (!baud) {
2645                 /* pick a default, any default... */
2646                 baud = 9600;
2647         }
2648
2649         dev_dbg(dev, "%s - baud rate = %d\n", __func__, baud);
2650         status = send_cmd_write_baud_rate(edge_port, baud);
2651         if (status == -1) {
2652                 /* Speed change was not possible - put back the old speed */
2653                 baud = tty_termios_baud_rate(old_termios);
2654                 tty_encode_baud_rate(tty, baud, baud);
2655         }
2656 }
2657
2658
2659 /****************************************************************************
2660  * unicode_to_ascii
2661  *      Turns a string from Unicode into ASCII.
2662  *      Doesn't do a good job with any characters that are outside the normal
2663  *      ASCII range, but it's only for debugging...
2664  *      NOTE: expects the unicode in LE format
2665  ****************************************************************************/
2666 static void unicode_to_ascii(char *string, int buflen,
2667                                         __le16 *unicode, int unicode_size)
2668 {
2669         int i;
2670
2671         if (buflen <= 0)        /* never happens, but... */
2672                 return;
2673         --buflen;               /* space for nul */
2674
2675         for (i = 0; i < unicode_size; i++) {
2676                 if (i >= buflen)
2677                         break;
2678                 string[i] = (char)(le16_to_cpu(unicode[i]));
2679         }
2680         string[i] = 0x00;
2681 }
2682
2683
2684 /****************************************************************************
2685  * get_manufacturing_desc
2686  *      reads in the manufacturing descriptor and stores it into the serial
2687  *      structure.
2688  ****************************************************************************/
2689 static void get_manufacturing_desc(struct edgeport_serial *edge_serial)
2690 {
2691         struct device *dev = &edge_serial->serial->dev->dev;
2692         int response;
2693
2694         dev_dbg(dev, "getting manufacturer descriptor\n");
2695
2696         response = rom_read(edge_serial->serial,
2697                                 (EDGE_MANUF_DESC_ADDR & 0xffff0000) >> 16,
2698                                 (__u16)(EDGE_MANUF_DESC_ADDR & 0x0000ffff),
2699                                 EDGE_MANUF_DESC_LEN,
2700                                 (__u8 *)(&edge_serial->manuf_descriptor));
2701
2702         if (response < 1)
2703                 dev_err(dev, "error in getting manufacturer descriptor\n");
2704         else {
2705                 char string[30];
2706                 dev_dbg(dev, "**Manufacturer Descriptor\n");
2707                 dev_dbg(dev, "  RomSize:        %dK\n",
2708                         edge_serial->manuf_descriptor.RomSize);
2709                 dev_dbg(dev, "  RamSize:        %dK\n",
2710                         edge_serial->manuf_descriptor.RamSize);
2711                 dev_dbg(dev, "  CpuRev:         %d\n",
2712                         edge_serial->manuf_descriptor.CpuRev);
2713                 dev_dbg(dev, "  BoardRev:       %d\n",
2714                         edge_serial->manuf_descriptor.BoardRev);
2715                 dev_dbg(dev, "  NumPorts:       %d\n",
2716                         edge_serial->manuf_descriptor.NumPorts);
2717                 dev_dbg(dev, "  DescDate:       %d/%d/%d\n",
2718                         edge_serial->manuf_descriptor.DescDate[0],
2719                         edge_serial->manuf_descriptor.DescDate[1],
2720                         edge_serial->manuf_descriptor.DescDate[2]+1900);
2721                 unicode_to_ascii(string, sizeof(string),
2722                         edge_serial->manuf_descriptor.SerialNumber,
2723                         edge_serial->manuf_descriptor.SerNumLength/2);
2724                 dev_dbg(dev, "  SerialNumber: %s\n", string);
2725                 unicode_to_ascii(string, sizeof(string),
2726                         edge_serial->manuf_descriptor.AssemblyNumber,
2727                         edge_serial->manuf_descriptor.AssemblyNumLength/2);
2728                 dev_dbg(dev, "  AssemblyNumber: %s\n", string);
2729                 unicode_to_ascii(string, sizeof(string),
2730                     edge_serial->manuf_descriptor.OemAssyNumber,
2731                     edge_serial->manuf_descriptor.OemAssyNumLength/2);
2732                 dev_dbg(dev, "  OemAssyNumber:  %s\n", string);
2733                 dev_dbg(dev, "  UartType:       %d\n",
2734                         edge_serial->manuf_descriptor.UartType);
2735                 dev_dbg(dev, "  IonPid:         %d\n",
2736                         edge_serial->manuf_descriptor.IonPid);
2737                 dev_dbg(dev, "  IonConfig:      %d\n",
2738                         edge_serial->manuf_descriptor.IonConfig);
2739         }
2740 }
2741
2742
2743 /****************************************************************************
2744  * get_boot_desc
2745  *      reads in the bootloader descriptor and stores it into the serial
2746  *      structure.
2747  ****************************************************************************/
2748 static void get_boot_desc(struct edgeport_serial *edge_serial)
2749 {
2750         struct device *dev = &edge_serial->serial->dev->dev;
2751         int response;
2752
2753         dev_dbg(dev, "getting boot descriptor\n");
2754
2755         response = rom_read(edge_serial->serial,
2756                                 (EDGE_BOOT_DESC_ADDR & 0xffff0000) >> 16,
2757                                 (__u16)(EDGE_BOOT_DESC_ADDR & 0x0000ffff),
2758                                 EDGE_BOOT_DESC_LEN,
2759                                 (__u8 *)(&edge_serial->boot_descriptor));
2760
2761         if (response < 1)
2762                 dev_err(dev, "error in getting boot descriptor\n");
2763         else {
2764                 dev_dbg(dev, "**Boot Descriptor:\n");
2765                 dev_dbg(dev, "  BootCodeLength: %d\n",
2766                         le16_to_cpu(edge_serial->boot_descriptor.BootCodeLength));
2767                 dev_dbg(dev, "  MajorVersion:   %d\n",
2768                         edge_serial->boot_descriptor.MajorVersion);
2769                 dev_dbg(dev, "  MinorVersion:   %d\n",
2770                         edge_serial->boot_descriptor.MinorVersion);
2771                 dev_dbg(dev, "  BuildNumber:    %d\n",
2772                         le16_to_cpu(edge_serial->boot_descriptor.BuildNumber));
2773                 dev_dbg(dev, "  Capabilities:   0x%x\n",
2774                       le16_to_cpu(edge_serial->boot_descriptor.Capabilities));
2775                 dev_dbg(dev, "  UConfig0:       %d\n",
2776                         edge_serial->boot_descriptor.UConfig0);
2777                 dev_dbg(dev, "  UConfig1:       %d\n",
2778                         edge_serial->boot_descriptor.UConfig1);
2779         }
2780 }
2781
2782
2783 /****************************************************************************
2784  * load_application_firmware
2785  *      This is called to load the application firmware to the device
2786  ****************************************************************************/
2787 static void load_application_firmware(struct edgeport_serial *edge_serial)
2788 {
2789         struct device *dev = &edge_serial->serial->dev->dev;
2790         const struct ihex_binrec *rec;
2791         const struct firmware *fw;
2792         const char *fw_name;
2793         const char *fw_info;
2794         int response;
2795         __u32 Operaddr;
2796         __u16 build;
2797
2798         switch (edge_serial->product_info.iDownloadFile) {
2799                 case EDGE_DOWNLOAD_FILE_I930:
2800                         fw_info = "downloading firmware version (930)";
2801                         fw_name = "edgeport/down.fw";
2802                         break;
2803
2804                 case EDGE_DOWNLOAD_FILE_80251:
2805                         fw_info = "downloading firmware version (80251)";
2806                         fw_name = "edgeport/down2.fw";
2807                         break;
2808
2809                 case EDGE_DOWNLOAD_FILE_NONE:
2810                         dev_dbg(dev, "No download file specified, skipping download\n");
2811                         return;
2812
2813                 default:
2814                         return;
2815         }
2816
2817         response = request_ihex_firmware(&fw, fw_name,
2818                                     &edge_serial->serial->dev->dev);
2819         if (response) {
2820                 dev_err(dev, "Failed to load image \"%s\" err %d\n",
2821                        fw_name, response);
2822                 return;
2823         }
2824
2825         rec = (const struct ihex_binrec *)fw->data;
2826         build = (rec->data[2] << 8) | rec->data[3];
2827
2828         dev_dbg(dev, "%s %d.%d.%d\n", fw_info, rec->data[0], rec->data[1], build);
2829
2830         edge_serial->product_info.FirmwareMajorVersion = rec->data[0];
2831         edge_serial->product_info.FirmwareMinorVersion = rec->data[1];
2832         edge_serial->product_info.FirmwareBuildNumber = cpu_to_le16(build);
2833
2834         for (rec = ihex_next_binrec(rec); rec;
2835              rec = ihex_next_binrec(rec)) {
2836                 Operaddr = be32_to_cpu(rec->addr);
2837                 response = sram_write(edge_serial->serial,
2838                                      Operaddr >> 16,
2839                                      Operaddr & 0xFFFF,
2840                                      be16_to_cpu(rec->len),
2841                                      &rec->data[0]);
2842                 if (response < 0) {
2843                         dev_err(&edge_serial->serial->dev->dev,
2844                                 "sram_write failed (%x, %x, %d)\n",
2845                                 Operaddr >> 16, Operaddr & 0xFFFF,
2846                                 be16_to_cpu(rec->len));
2847                         break;
2848                 }
2849         }
2850
2851         dev_dbg(dev, "sending exec_dl_code\n");
2852         response = usb_control_msg (edge_serial->serial->dev,
2853                                     usb_sndctrlpipe(edge_serial->serial->dev, 0),
2854                                     USB_REQUEST_ION_EXEC_DL_CODE,
2855                                     0x40, 0x4000, 0x0001, NULL, 0, 3000);
2856
2857         release_firmware(fw);
2858 }
2859
2860
2861 /****************************************************************************
2862  * edge_startup
2863  ****************************************************************************/
2864 static int edge_startup(struct usb_serial *serial)
2865 {
2866         struct edgeport_serial *edge_serial;
2867         struct usb_device *dev;
2868         struct device *ddev = &serial->dev->dev;
2869         int i;
2870         int response;
2871         bool interrupt_in_found;
2872         bool bulk_in_found;
2873         bool bulk_out_found;
2874         static __u32 descriptor[3] = {  EDGE_COMPATIBILITY_MASK0,
2875                                         EDGE_COMPATIBILITY_MASK1,
2876                                         EDGE_COMPATIBILITY_MASK2 };
2877
2878         dev = serial->dev;
2879
2880         /* create our private serial structure */
2881         edge_serial = kzalloc(sizeof(struct edgeport_serial), GFP_KERNEL);
2882         if (edge_serial == NULL) {
2883                 dev_err(&serial->dev->dev, "%s - Out of memory\n", __func__);
2884                 return -ENOMEM;
2885         }
2886         spin_lock_init(&edge_serial->es_lock);
2887         edge_serial->serial = serial;
2888         usb_set_serial_data(serial, edge_serial);
2889
2890         /* get the name for the device from the device */
2891         i = usb_string(dev, dev->descriptor.iManufacturer,
2892             &edge_serial->name[0], MAX_NAME_LEN+1);
2893         if (i < 0)
2894                 i = 0;
2895         edge_serial->name[i++] = ' ';
2896         usb_string(dev, dev->descriptor.iProduct,
2897             &edge_serial->name[i], MAX_NAME_LEN+2 - i);
2898
2899         dev_info(&serial->dev->dev, "%s detected\n", edge_serial->name);
2900
2901         /* Read the epic descriptor */
2902         if (get_epic_descriptor(edge_serial) <= 0) {
2903                 /* memcpy descriptor to Supports structures */
2904                 memcpy(&edge_serial->epic_descriptor.Supports, descriptor,
2905                        sizeof(struct edge_compatibility_bits));
2906
2907                 /* get the manufacturing descriptor for this device */
2908                 get_manufacturing_desc(edge_serial);
2909
2910                 /* get the boot descriptor */
2911                 get_boot_desc(edge_serial);
2912
2913                 get_product_info(edge_serial);
2914         }
2915
2916         /* set the number of ports from the manufacturing description */
2917         /* serial->num_ports = serial->product_info.NumPorts; */
2918         if ((!edge_serial->is_epic) &&
2919             (edge_serial->product_info.NumPorts != serial->num_ports)) {
2920                 dev_warn(ddev,
2921                         "Device Reported %d serial ports vs. core thinking we have %d ports, email greg@kroah.com this information.\n",
2922                          edge_serial->product_info.NumPorts,
2923                          serial->num_ports);
2924         }
2925
2926         dev_dbg(ddev, "%s - time 1 %ld\n", __func__, jiffies);
2927
2928         /* If not an EPiC device */
2929         if (!edge_serial->is_epic) {
2930                 /* now load the application firmware into this device */
2931                 load_application_firmware(edge_serial);
2932
2933                 dev_dbg(ddev, "%s - time 2 %ld\n", __func__, jiffies);
2934
2935                 /* Check current Edgeport EEPROM and update if necessary */
2936                 update_edgeport_E2PROM(edge_serial);
2937
2938                 dev_dbg(ddev, "%s - time 3 %ld\n", __func__, jiffies);
2939
2940                 /* set the configuration to use #1 */
2941 /*              dev_dbg(ddev, "set_configuration 1\n"); */
2942 /*              usb_set_configuration (dev, 1); */
2943         }
2944         dev_dbg(ddev, "  FirmwareMajorVersion  %d.%d.%d\n",
2945             edge_serial->product_info.FirmwareMajorVersion,
2946             edge_serial->product_info.FirmwareMinorVersion,
2947             le16_to_cpu(edge_serial->product_info.FirmwareBuildNumber));
2948
2949         /* we set up the pointers to the endpoints in the edge_open function,
2950          * as the structures aren't created yet. */
2951
2952         response = 0;
2953
2954         if (edge_serial->is_epic) {
2955                 /* EPIC thing, set up our interrupt polling now and our read
2956                  * urb, so that the device knows it really is connected. */
2957                 interrupt_in_found = bulk_in_found = bulk_out_found = false;
2958                 for (i = 0; i < serial->interface->altsetting[0]
2959                                                 .desc.bNumEndpoints; ++i) {
2960                         struct usb_endpoint_descriptor *endpoint;
2961                         int buffer_size;
2962
2963                         endpoint = &serial->interface->altsetting[0].
2964                                                         endpoint[i].desc;
2965                         buffer_size = usb_endpoint_maxp(endpoint);
2966                         if (!interrupt_in_found &&
2967                             (usb_endpoint_is_int_in(endpoint))) {
2968                                 /* we found a interrupt in endpoint */
2969                                 dev_dbg(ddev, "found interrupt in\n");
2970
2971                                 /* not set up yet, so do it now */
2972                                 edge_serial->interrupt_read_urb =
2973                                                 usb_alloc_urb(0, GFP_KERNEL);
2974                                 if (!edge_serial->interrupt_read_urb) {
2975                                         dev_err(ddev, "out of memory\n");
2976                                         return -ENOMEM;
2977                                 }
2978                                 edge_serial->interrupt_in_buffer =
2979                                         kmalloc(buffer_size, GFP_KERNEL);
2980                                 if (!edge_serial->interrupt_in_buffer) {
2981                                         dev_err(ddev, "out of memory\n");
2982                                         usb_free_urb(edge_serial->interrupt_read_urb);
2983                                         return -ENOMEM;
2984                                 }
2985                                 edge_serial->interrupt_in_endpoint =
2986                                                 endpoint->bEndpointAddress;
2987
2988                                 /* set up our interrupt urb */
2989                                 usb_fill_int_urb(
2990                                         edge_serial->interrupt_read_urb,
2991                                         dev,
2992                                         usb_rcvintpipe(dev,
2993                                                 endpoint->bEndpointAddress),
2994                                         edge_serial->interrupt_in_buffer,
2995                                         buffer_size,
2996                                         edge_interrupt_callback,
2997                                         edge_serial,
2998                                         endpoint->bInterval);
2999
3000                                 interrupt_in_found = true;
3001                         }
3002
3003                         if (!bulk_in_found &&
3004                                 (usb_endpoint_is_bulk_in(endpoint))) {
3005                                 /* we found a bulk in endpoint */
3006                                 dev_dbg(ddev, "found bulk in\n");
3007
3008                                 /* not set up yet, so do it now */
3009                                 edge_serial->read_urb =
3010                                                 usb_alloc_urb(0, GFP_KERNEL);
3011                                 if (!edge_serial->read_urb) {
3012                                         dev_err(ddev, "out of memory\n");
3013                                         return -ENOMEM;
3014                                 }
3015                                 edge_serial->bulk_in_buffer =
3016                                         kmalloc(buffer_size, GFP_KERNEL);
3017                                 if (!edge_serial->bulk_in_buffer) {
3018                                         dev_err(&dev->dev, "out of memory\n");
3019                                         usb_free_urb(edge_serial->read_urb);
3020                                         return -ENOMEM;
3021                                 }
3022                                 edge_serial->bulk_in_endpoint =
3023                                                 endpoint->bEndpointAddress;
3024
3025                                 /* set up our bulk in urb */
3026                                 usb_fill_bulk_urb(edge_serial->read_urb, dev,
3027                                         usb_rcvbulkpipe(dev,
3028                                                 endpoint->bEndpointAddress),
3029                                         edge_serial->bulk_in_buffer,
3030                                         usb_endpoint_maxp(endpoint),
3031                                         edge_bulk_in_callback,
3032                                         edge_serial);
3033                                 bulk_in_found = true;
3034                         }
3035
3036                         if (!bulk_out_found &&
3037                             (usb_endpoint_is_bulk_out(endpoint))) {
3038                                 /* we found a bulk out endpoint */
3039                                 dev_dbg(ddev, "found bulk out\n");
3040                                 edge_serial->bulk_out_endpoint =
3041                                                 endpoint->bEndpointAddress;
3042                                 bulk_out_found = true;
3043                         }
3044                 }
3045
3046                 if (!interrupt_in_found || !bulk_in_found || !bulk_out_found) {
3047                         dev_err(ddev, "Error - the proper endpoints were not found!\n");
3048                         return -ENODEV;
3049                 }
3050
3051                 /* start interrupt read for this edgeport this interrupt will
3052                  * continue as long as the edgeport is connected */
3053                 response = usb_submit_urb(edge_serial->interrupt_read_urb,
3054                                                                 GFP_KERNEL);
3055                 if (response)
3056                         dev_err(ddev, "%s - Error %d submitting control urb\n",
3057                                 __func__, response);
3058         }
3059         return response;
3060 }
3061
3062
3063 /****************************************************************************
3064  * edge_disconnect
3065  *      This function is called whenever the device is removed from the usb bus.
3066  ****************************************************************************/
3067 static void edge_disconnect(struct usb_serial *serial)
3068 {
3069         struct edgeport_serial *edge_serial = usb_get_serial_data(serial);
3070
3071         /* stop reads and writes on all ports */
3072         /* free up our endpoint stuff */
3073         if (edge_serial->is_epic) {
3074                 usb_kill_urb(edge_serial->interrupt_read_urb);
3075                 usb_free_urb(edge_serial->interrupt_read_urb);
3076                 kfree(edge_serial->interrupt_in_buffer);
3077
3078                 usb_kill_urb(edge_serial->read_urb);
3079                 usb_free_urb(edge_serial->read_urb);
3080                 kfree(edge_serial->bulk_in_buffer);
3081         }
3082 }
3083
3084
3085 /****************************************************************************
3086  * edge_release
3087  *      This function is called when the device structure is deallocated.
3088  ****************************************************************************/
3089 static void edge_release(struct usb_serial *serial)
3090 {
3091         struct edgeport_serial *edge_serial = usb_get_serial_data(serial);
3092
3093         kfree(edge_serial);
3094 }
3095
3096 static int edge_port_probe(struct usb_serial_port *port)
3097 {
3098         struct edgeport_port *edge_port;
3099
3100         edge_port = kzalloc(sizeof(*edge_port), GFP_KERNEL);
3101         if (!edge_port)
3102                 return -ENOMEM;
3103
3104         spin_lock_init(&edge_port->ep_lock);
3105         edge_port->port = port;
3106
3107         usb_set_serial_port_data(port, edge_port);
3108
3109         return 0;
3110 }
3111
3112 static int edge_port_remove(struct usb_serial_port *port)
3113 {
3114         struct edgeport_port *edge_port;
3115
3116         edge_port = usb_get_serial_port_data(port);
3117         kfree(edge_port);
3118
3119         return 0;
3120 }
3121
3122 module_usb_serial_driver(serial_drivers, id_table_combined);
3123
3124 MODULE_AUTHOR(DRIVER_AUTHOR);
3125 MODULE_DESCRIPTION(DRIVER_DESC);
3126 MODULE_LICENSE("GPL");
3127 MODULE_FIRMWARE("edgeport/boot.fw");
3128 MODULE_FIRMWARE("edgeport/boot2.fw");
3129 MODULE_FIRMWARE("edgeport/down.fw");
3130 MODULE_FIRMWARE("edgeport/down2.fw");