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 <asm/uaccess.h>
  46 #include <linux/usb.h>
  47 #include <linux/usb/serial.h>
  48 #include "io_edgeport.h"
  49 #include "io_ionsp.h"           /* info for the iosp messages */
  50 #include "io_16654.h"           /* 16654 UART defines */
  51
  52 /*
  53  * Version Information
  54  */
  55 #define DRIVER_VERSION "v2.7"
  56 #define DRIVER_AUTHOR "Greg Kroah-Hartman <greg@kroah.com> and David Iacovelli"
  57 #define DRIVER_DESC "Edgeport USB Serial Driver"
  58
  59 /* First, the latest boot code - for first generation edgeports */
  60 #define IMAGE_ARRAY_NAME        BootCodeImage_GEN1
  61 #define IMAGE_VERSION_NAME      BootCodeImageVersion_GEN1
  62 #include "io_fw_boot.h"         /* the bootloader firmware to download to a device, if it needs it */
  63
  64 /* for second generation edgeports */
  65 #define IMAGE_ARRAY_NAME        BootCodeImage_GEN2
  66 #define IMAGE_VERSION_NAME      BootCodeImageVersion_GEN2
  67 #include "io_fw_boot2.h"        /* the bootloader firmware to download to a device, if it needs it */
  68
  69 /* Then finally the main run-time operational code - for first generation edgeports */
  70 #define IMAGE_ARRAY_NAME        OperationalCodeImage_GEN1
  71 #define IMAGE_VERSION_NAME      OperationalCodeImageVersion_GEN1
  72 #include "io_fw_down.h"         /* Define array OperationalCodeImage[] */
  73
  74 /* for second generation edgeports */
  75 #define IMAGE_ARRAY_NAME        OperationalCodeImage_GEN2
  76 #define IMAGE_VERSION_NAME      OperationalCodeImageVersion_GEN2
  77 #include "io_fw_down2.h"        /* Define array OperationalCodeImage[] */
  78
  79 #define MAX_NAME_LEN            64
  80
  81 #define CHASE_TIMEOUT           (5*HZ)          /* 5 seconds */
  82 #define OPEN_TIMEOUT            (5*HZ)          /* 5 seconds */
  83 #define COMMAND_TIMEOUT         (5*HZ)          /* 5 seconds */
  84
  85 /* receive port state */
  86 enum RXSTATE {
  87         EXPECT_HDR1 = 0,        /* Expect header byte 1 */
  88         EXPECT_HDR2 = 1,        /* Expect header byte 2 */
  89         EXPECT_DATA = 2,        /* Expect 'RxBytesRemaining' data */
  90         EXPECT_HDR3 = 3,        /* Expect header byte 3 (for status hdrs only) */
  91 };
  92
  93
  94 /* Transmit Fifo
  95  * This Transmit queue is an extension of the edgeport Rx buffer.
  96  * The maximum amount of data buffered in both the edgeport
  97  * Rx buffer (maxTxCredits) and this buffer will never exceed maxTxCredits.
  98  */
  99 struct TxFifo {
 100         unsigned int    head;   /* index to head pointer (write) */
 101         unsigned int    tail;   /* index to tail pointer (read)  */
 102         unsigned int    count;  /* Bytes in queue */
 103         unsigned int    size;   /* Max size of queue (equal to Max number of TxCredits) */
 104         unsigned char   *fifo;  /* allocated Buffer */
 105 };
 106
 107 /* This structure holds all of the local port information */
 108 struct edgeport_port {
 109         __u16                   txCredits;              /* our current credits for this port */
 110         __u16                   maxTxCredits;           /* the max size of the port */
 111
 112         struct TxFifo           txfifo;                 /* transmit fifo -- size will be maxTxCredits */
 113         struct urb              *write_urb;             /* write URB for this port */
 114         bool                    write_in_progress;      /* 'true' while a write URB is outstanding */
 115         spinlock_t              ep_lock;
 116
 117         __u8                    shadowLCR;              /* last LCR value received */
 118         __u8                    shadowMCR;              /* last MCR value received */
 119         __u8                    shadowMSR;              /* last MSR value received */
 120         __u8                    shadowLSR;              /* last LSR value received */
 121         __u8                    shadowXonChar;          /* last value set as XON char in Edgeport */
 122         __u8                    shadowXoffChar;         /* last value set as XOFF char in Edgeport */
 123         __u8                    validDataMask;
 124         __u32                   baudRate;
 125
 126         bool                    open;
 127         bool                    openPending;
 128         bool                    commandPending;
 129         bool                    closePending;
 130         bool                    chaseResponsePending;
 131
 132         wait_queue_head_t       wait_chase;             /* for handling sleeping while waiting for chase to finish */
 133         wait_queue_head_t       wait_open;              /* for handling sleeping while waiting for open to finish */
 134         wait_queue_head_t       wait_command;           /* for handling sleeping while waiting for command to finish */
 135         wait_queue_head_t       delta_msr_wait;         /* for handling sleeping while waiting for msr change to happen */
 136
 137         struct async_icount     icount;
 138         struct usb_serial_port  *port;                  /* loop back to the owner of this object */
 139 };
 140
 141
 142 /* This structure holds all of the individual device information */
 143 struct edgeport_serial {
 144         char                    name[MAX_NAME_LEN+2];           /* string name of this device */
 145
 146         struct edge_manuf_descriptor    manuf_descriptor;       /* the manufacturer descriptor */
 147         struct edge_boot_descriptor     boot_descriptor;        /* the boot firmware descriptor */
 148         struct edgeport_product_info    product_info;           /* Product Info */
 149         struct edge_compatibility_descriptor epic_descriptor;   /* Edgeport compatible descriptor */
 150         int                     is_epic;                        /* flag if EPiC device or not */
 151
 152         __u8                    interrupt_in_endpoint;          /* the interrupt endpoint handle */
 153         unsigned char *         interrupt_in_buffer;            /* the buffer we use for the interrupt endpoint */
 154         struct urb *            interrupt_read_urb;             /* our interrupt urb */
 155
 156         __u8                    bulk_in_endpoint;               /* the bulk in endpoint handle */
 157         unsigned char *         bulk_in_buffer;                 /* the buffer we use for the bulk in endpoint */
 158         struct urb *            read_urb;                       /* our bulk read urb */
 159         bool                    read_in_progress;
 160         spinlock_t              es_lock;
 161
 162         __u8                    bulk_out_endpoint;              /* the bulk out endpoint handle */
 163
 164         __s16                   rxBytesAvail;                   /* the number of bytes that we need to read from this device */
 165
 166         enum RXSTATE            rxState;                        /* the current state of the bulk receive processor */
 167         __u8                    rxHeader1;                      /* receive header byte 1 */
 168         __u8                    rxHeader2;                      /* receive header byte 2 */
 169         __u8                    rxHeader3;                      /* receive header byte 3 */
 170         __u8                    rxPort;                         /* the port that we are currently receiving data for */
 171         __u8                    rxStatusCode;                   /* the receive status code */
 172         __u8                    rxStatusParam;                  /* the receive status paramater */
 173         __s16                   rxBytesRemaining;               /* the number of port bytes left to read */
 174         struct usb_serial       *serial;                        /* loop back to the owner of this object */
 175 };
 176
 177 /* baud rate information */
 178 struct divisor_table_entry {
 179         __u32   BaudRate;
 180         __u16  Divisor;
 181 };
 182
 183 //
 184 // Define table of divisors for Rev A EdgePort/4 hardware
 185 // These assume a 3.6864MHz crystal, the standard /16, and
 186 // MCR.7 = 0.
 187 //
 188 static const struct divisor_table_entry divisor_table[] = {
 189         {   50,         4608},
 190         {   75,         3072},
 191         {   110,        2095},          /* 2094.545455 => 230450   => .0217 % over */
 192         {   134,        1713},          /* 1713.011152 => 230398.5 => .00065% under */
 193         {   150,        1536},
 194         {   300,        768},
 195         {   600,        384},
 196         {   1200,       192},
 197         {   1800,       128},
 198         {   2400,       96},
 199         {   4800,       48},
 200         {   7200,       32},
 201         {   9600,       24},
 202         {   14400,      16},
 203         {   19200,      12},
 204         {   38400,      6},
 205         {   57600,      4},
 206         {   115200,     2},
 207         {   230400,     1},
 208 };
 209
 210 /* local variables */
 211 static int debug;
 212
 213 static int low_latency = 1;     /* tty low latency flag, on by default */
 214
 215 static atomic_t CmdUrbs;                /* Number of outstanding Command Write Urbs */
 216
 217
 218 /* local function prototypes */
 219
 220 /* function prototypes for all URB callbacks */
 221 static void edge_interrupt_callback     (struct urb *urb);
 222 static void edge_bulk_in_callback       (struct urb *urb);
 223 static void edge_bulk_out_data_callback (struct urb *urb);
 224 static void edge_bulk_out_cmd_callback  (struct urb *urb);
 225
 226 /* function prototypes for the usbserial callbacks */
 227 static int  edge_open                   (struct usb_serial_port *port, struct file *filp);
 228 static void edge_close                  (struct usb_serial_port *port, struct file *filp);
 229 static int  edge_write                  (struct usb_serial_port *port, const unsigned char *buf, int count);
 230 static int  edge_write_room             (struct usb_serial_port *port);
 231 static int  edge_chars_in_buffer        (struct usb_serial_port *port);
 232 static void edge_throttle               (struct usb_serial_port *port);
 233 static void edge_unthrottle             (struct usb_serial_port *port);
 234 static void edge_set_termios            (struct usb_serial_port *port, struct ktermios *old_termios);
 235 static int  edge_ioctl                  (struct usb_serial_port *port, struct file *file, unsigned int cmd, unsigned long arg);
 236 static void edge_break                  (struct usb_serial_port *port, int break_state);
 237 static int  edge_tiocmget               (struct usb_serial_port *port, struct file *file);
 238 static int  edge_tiocmset               (struct usb_serial_port *port, struct file *file, unsigned int set, unsigned int clear);
 239 static int  edge_startup                (struct usb_serial *serial);
 240 static void edge_shutdown               (struct usb_serial *serial);
 241
 242
 243 #include "io_tables.h"  /* all of the devices that this driver supports */
 244
 245 /* function prototypes for all of our local functions */
 246 static void  process_rcvd_data          (struct edgeport_serial *edge_serial, unsigned char *buffer, __u16 bufferLength);
 247 static void process_rcvd_status         (struct edgeport_serial *edge_serial, __u8 byte2, __u8 byte3);
 248 static void edge_tty_recv                       (struct device *dev, struct tty_struct *tty, unsigned char *data, int length);
 249 static void handle_new_msr              (struct edgeport_port *edge_port, __u8 newMsr);
 250 static void handle_new_lsr              (struct edgeport_port *edge_port, __u8 lsrData, __u8 lsr, __u8 data);
 251 static int  send_iosp_ext_cmd           (struct edgeport_port *edge_port, __u8 command, __u8 param);
 252 static int  calc_baud_rate_divisor      (int baud_rate, int *divisor);
 253 static int  send_cmd_write_baud_rate    (struct edgeport_port *edge_port, int baudRate);
 254 static void change_port_settings        (struct edgeport_port *edge_port, struct ktermios *old_termios);
 255 static int  send_cmd_write_uart_register        (struct edgeport_port *edge_port, __u8 regNum, __u8 regValue);
 256 static int  write_cmd_usb               (struct edgeport_port *edge_port, unsigned char *buffer, int writeLength);
 257 static void send_more_port_data         (struct edgeport_serial *edge_serial, struct edgeport_port *edge_port);
 258
 259 static int  sram_write                  (struct usb_serial *serial, __u16 extAddr, __u16 addr, __u16 length, __u8 *data);
 260 static int  rom_read                    (struct usb_serial *serial, __u16 extAddr, __u16 addr, __u16 length, __u8 *data);
 261 static int  rom_write                   (struct usb_serial *serial, __u16 extAddr, __u16 addr, __u16 length, __u8 *data);
 262 static void get_manufacturing_desc      (struct edgeport_serial *edge_serial);
 263 static void get_boot_desc               (struct edgeport_serial *edge_serial);
 264 static void load_application_firmware   (struct edgeport_serial *edge_serial);
 265
 266 static void unicode_to_ascii(char *string, int buflen, __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         __u32 BootCurVer;
 285         __u32 BootNewVer;
 286         __u8 BootMajorVersion;
 287         __u8 BootMinorVersion;
 288         __le16 BootBuildNumber;
 289         __u8 *BootImage;
 290         __u32 BootSize;
 291         struct edge_firmware_image_record *record;
 292         unsigned char *firmware;
 293         int response;
 294
 295
 296         switch (edge_serial->product_info.iDownloadFile) {
 297                 case EDGE_DOWNLOAD_FILE_I930:
 298                         BootMajorVersion        = BootCodeImageVersion_GEN1.MajorVersion;
 299                         BootMinorVersion        = BootCodeImageVersion_GEN1.MinorVersion;
 300                         BootBuildNumber         = cpu_to_le16(BootCodeImageVersion_GEN1.BuildNumber);
 301                         BootImage               = &BootCodeImage_GEN1[0];
 302                         BootSize                = sizeof( BootCodeImage_GEN1 );
 303                         break;
 304
 305                 case EDGE_DOWNLOAD_FILE_80251:
 306                         BootMajorVersion        = BootCodeImageVersion_GEN2.MajorVersion;
 307                         BootMinorVersion        = BootCodeImageVersion_GEN2.MinorVersion;
 308                         BootBuildNumber         = cpu_to_le16(BootCodeImageVersion_GEN2.BuildNumber);
 309                         BootImage               = &BootCodeImage_GEN2[0];
 310                         BootSize                = sizeof( BootCodeImage_GEN2 );
 311                         break;
 312
 313                 default:
 314                         return;
 315         }
 316
 317         // Check Boot Image Version
 318         BootCurVer = (edge_serial->boot_descriptor.MajorVersion << 24) +
 319                      (edge_serial->boot_descriptor.MinorVersion << 16) +
 320                       le16_to_cpu(edge_serial->boot_descriptor.BuildNumber);
 321
 322         BootNewVer = (BootMajorVersion << 24) +
 323                      (BootMinorVersion << 16) +
 324                       le16_to_cpu(BootBuildNumber);
 325
 326         dbg("Current Boot Image version %d.%d.%d",
 327             edge_serial->boot_descriptor.MajorVersion,
 328             edge_serial->boot_descriptor.MinorVersion,
 329             le16_to_cpu(edge_serial->boot_descriptor.BuildNumber));
 330
 331
 332         if (BootNewVer > BootCurVer) {
 333                 dbg("**Update Boot Image from %d.%d.%d to %d.%d.%d",
 334                     edge_serial->boot_descriptor.MajorVersion,
 335                     edge_serial->boot_descriptor.MinorVersion,
 336                     le16_to_cpu(edge_serial->boot_descriptor.BuildNumber),
 337                     BootMajorVersion,
 338                     BootMinorVersion,
 339                     le16_to_cpu(BootBuildNumber));
 340
 341
 342                 dbg("Downloading new Boot Image");
 343
 344                 firmware = BootImage;
 345
 346                 for (;;) {
 347                         record = (struct edge_firmware_image_record *)firmware;
 348                         response = rom_write (edge_serial->serial, le16_to_cpu(record->ExtAddr), le16_to_cpu(record->Addr), le16_to_cpu(record->Len), &record->Data[0]);
 349                         if (response < 0) {
 350                                 dev_err(&edge_serial->serial->dev->dev, "rom_write failed (%x, %x, %d)\n", le16_to_cpu(record->ExtAddr), le16_to_cpu(record->Addr), le16_to_cpu(record->Len));
 351                                 break;
 352                         }
 353                         firmware += sizeof (struct edge_firmware_image_record) + le16_to_cpu(record->Len);
 354                         if (firmware >= &BootImage[BootSize]) {
 355                                 break;
 356                         }
 357                 }
 358         } else {
 359                 dbg("Boot Image -- already up to date");
 360         }
 361 }
 362
 363
 364 /************************************************************************
 365  *                                                                      *
 366  *  Get string descriptor from device                                   *
 367  *                                                                      *
 368  ************************************************************************/
 369 static int get_string (struct usb_device *dev, int Id, char *string, int buflen)
 370 {
 371         struct usb_string_descriptor StringDesc;
 372         struct usb_string_descriptor *pStringDesc;
 373
 374         dbg("%s - USB String ID = %d", __FUNCTION__, Id );
 375
 376         if (!usb_get_descriptor(dev, USB_DT_STRING, Id, &StringDesc, sizeof(StringDesc))) {
 377                 return 0;
 378         }
 379
 380         pStringDesc = kmalloc (StringDesc.bLength, GFP_KERNEL);
 381
 382         if (!pStringDesc) {
 383                 return 0;
 384         }
 385
 386         if (!usb_get_descriptor(dev, USB_DT_STRING, Id, pStringDesc, StringDesc.bLength )) {
 387                 kfree(pStringDesc);
 388                 return 0;
 389         }
 390
 391         unicode_to_ascii(string, buflen, pStringDesc->wData, pStringDesc->bLength/2);
 392
 393         kfree(pStringDesc);
 394         dbg("%s - USB String %s", __FUNCTION__, string);
 395         return strlen(string);
 396 }
 397
 398
 399 #if 0
 400 /************************************************************************
 401  *
 402  *  Get string descriptor from device
 403  *
 404  ************************************************************************/
 405 static int get_string_desc (struct usb_device *dev, int Id, struct usb_string_descriptor **pRetDesc)
 406 {
 407         struct usb_string_descriptor StringDesc;
 408         struct usb_string_descriptor *pStringDesc;
 409
 410         dbg("%s - USB String ID = %d", __FUNCTION__, Id );
 411
 412         if (!usb_get_descriptor(dev, USB_DT_STRING, Id, &StringDesc, sizeof(StringDesc))) {
 413                 return 0;
 414         }
 415
 416         pStringDesc = kmalloc (StringDesc.bLength, GFP_KERNEL);
 417
 418         if (!pStringDesc) {
 419                 return -1;
 420         }
 421
 422         if (!usb_get_descriptor(dev, USB_DT_STRING, Id, pStringDesc, StringDesc.bLength )) {
 423                 kfree(pStringDesc);
 424                 return -1;
 425         }
 426
 427         *pRetDesc = pStringDesc;
 428         return 0;
 429 }
 430 #endif
 431
 432 static void dump_product_info(struct edgeport_product_info *product_info)
 433 {
 434         // Dump Product Info structure
 435         dbg("**Product Information:");
 436         dbg("  ProductId             %x", product_info->ProductId );
 437         dbg("  NumPorts              %d", product_info->NumPorts );
 438         dbg("  ProdInfoVer           %d", product_info->ProdInfoVer );
 439         dbg("  IsServer              %d", product_info->IsServer);
 440         dbg("  IsRS232               %d", product_info->IsRS232 );
 441         dbg("  IsRS422               %d", product_info->IsRS422 );
 442         dbg("  IsRS485               %d", product_info->IsRS485 );
 443         dbg("  RomSize               %d", product_info->RomSize );
 444         dbg("  RamSize               %d", product_info->RamSize );
 445         dbg("  CpuRev                %x", product_info->CpuRev  );
 446         dbg("  BoardRev              %x", product_info->BoardRev);
 447         dbg("  BootMajorVersion      %d.%d.%d", product_info->BootMajorVersion,
 448             product_info->BootMinorVersion,
 449             le16_to_cpu(product_info->BootBuildNumber));
 450         dbg("  FirmwareMajorVersion  %d.%d.%d", product_info->FirmwareMajorVersion,
 451             product_info->FirmwareMinorVersion,
 452             le16_to_cpu(product_info->FirmwareBuildNumber));
 453         dbg("  ManufactureDescDate   %d/%d/%d", product_info->ManufactureDescDate[0],
 454             product_info->ManufactureDescDate[1],
 455             product_info->ManufactureDescDate[2]+1900);
 456         dbg("  iDownloadFile         0x%x", product_info->iDownloadFile);
 457         dbg("  EpicVer               %d", product_info->EpicVer);
 458 }
 459
 460 static void get_product_info(struct edgeport_serial *edge_serial)
 461 {
 462         struct edgeport_product_info *product_info = &edge_serial->product_info;
 463
 464         memset (product_info, 0, sizeof(struct edgeport_product_info));
 465
 466         product_info->ProductId         = (__u16)(le16_to_cpu(edge_serial->serial->dev->descriptor.idProduct) & ~ION_DEVICE_ID_80251_NETCHIP);
 467         product_info->NumPorts          = edge_serial->manuf_descriptor.NumPorts;
 468         product_info->ProdInfoVer       = 0;
 469
 470         product_info->RomSize           = edge_serial->manuf_descriptor.RomSize;
 471         product_info->RamSize           = edge_serial->manuf_descriptor.RamSize;
 472         product_info->CpuRev            = edge_serial->manuf_descriptor.CpuRev;
 473         product_info->BoardRev          = edge_serial->manuf_descriptor.BoardRev;
 474
 475         product_info->BootMajorVersion  = edge_serial->boot_descriptor.MajorVersion;
 476         product_info->BootMinorVersion  = edge_serial->boot_descriptor.MinorVersion;
 477         product_info->BootBuildNumber   = edge_serial->boot_descriptor.BuildNumber;
 478
 479         memcpy(product_info->ManufactureDescDate, edge_serial->manuf_descriptor.DescDate, sizeof(edge_serial->manuf_descriptor.DescDate));
 480
 481         // check if this is 2nd generation hardware
 482         if (le16_to_cpu(edge_serial->serial->dev->descriptor.idProduct) & ION_DEVICE_ID_80251_NETCHIP) {
 483                 product_info->FirmwareMajorVersion      = OperationalCodeImageVersion_GEN2.MajorVersion;
 484                 product_info->FirmwareMinorVersion      = OperationalCodeImageVersion_GEN2.MinorVersion;
 485                 product_info->FirmwareBuildNumber       = cpu_to_le16(OperationalCodeImageVersion_GEN2.BuildNumber);
 486                 product_info->iDownloadFile             = EDGE_DOWNLOAD_FILE_80251;
 487         } else {
 488                 product_info->FirmwareMajorVersion      = OperationalCodeImageVersion_GEN1.MajorVersion;
 489                 product_info->FirmwareMinorVersion      = OperationalCodeImageVersion_GEN1.MinorVersion;
 490                 product_info->FirmwareBuildNumber       = cpu_to_le16(OperationalCodeImageVersion_GEN1.BuildNumber);
 491                 product_info->iDownloadFile             = EDGE_DOWNLOAD_FILE_I930;
 492         }
 493
 494         // Determine Product type and set appropriate flags
 495         switch (DEVICE_ID_FROM_USB_PRODUCT_ID(product_info->ProductId)) {
 496                 case ION_DEVICE_ID_EDGEPORT_COMPATIBLE:
 497                 case ION_DEVICE_ID_EDGEPORT_4T:
 498                 case ION_DEVICE_ID_EDGEPORT_4:
 499                 case ION_DEVICE_ID_EDGEPORT_2:
 500                 case ION_DEVICE_ID_EDGEPORT_8_DUAL_CPU:
 501                 case ION_DEVICE_ID_EDGEPORT_8:
 502                 case ION_DEVICE_ID_EDGEPORT_421:
 503                 case ION_DEVICE_ID_EDGEPORT_21:
 504                 case ION_DEVICE_ID_EDGEPORT_2_DIN:
 505                 case ION_DEVICE_ID_EDGEPORT_4_DIN:
 506                 case ION_DEVICE_ID_EDGEPORT_16_DUAL_CPU:
 507                         product_info->IsRS232 = 1;
 508                         break;
 509
 510                 case ION_DEVICE_ID_EDGEPORT_2I:                            // Edgeport/2 RS422/RS485
 511                         product_info->IsRS422 = 1;
 512                         product_info->IsRS485 = 1;
 513                         break;
 514
 515                 case ION_DEVICE_ID_EDGEPORT_8I:                            // Edgeport/4 RS422
 516                 case ION_DEVICE_ID_EDGEPORT_4I:                            // Edgeport/4 RS422
 517                         product_info->IsRS422 = 1;
 518                         break;
 519         }
 520
 521         dump_product_info(product_info);
 522 }
 523
 524 static int get_epic_descriptor(struct edgeport_serial *ep)
 525 {
 526         int result;
 527         struct usb_serial *serial = ep->serial;
 528         struct edgeport_product_info *product_info = &ep->product_info;
 529         struct edge_compatibility_descriptor *epic = &ep->epic_descriptor;
 530         struct edge_compatibility_bits *bits;
 531
 532         ep->is_epic = 0;
 533         result = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
 534                                  USB_REQUEST_ION_GET_EPIC_DESC,
 535                                  0xC0, 0x00, 0x00,
 536                                  &ep->epic_descriptor,
 537                                  sizeof(struct edge_compatibility_descriptor),
 538                                  300);
 539
 540         dbg("%s result = %d", __FUNCTION__, result);
 541
 542         if (result > 0) {
 543                 ep->is_epic = 1;
 544                 memset(product_info, 0, sizeof(struct edgeport_product_info));
 545
 546                 product_info->NumPorts                  = epic->NumPorts;
 547                 product_info->ProdInfoVer               = 0;
 548                 product_info->FirmwareMajorVersion      = epic->MajorVersion;
 549                 product_info->FirmwareMinorVersion      = epic->MinorVersion;
 550                 product_info->FirmwareBuildNumber       = epic->BuildNumber;
 551                 product_info->iDownloadFile             = epic->iDownloadFile;
 552                 product_info->EpicVer                   = epic->EpicVer;
 553                 product_info->Epic                      = epic->Supports;
 554                 product_info->ProductId                 = ION_DEVICE_ID_EDGEPORT_COMPATIBLE;
 555                 dump_product_info(product_info);
 556
 557                 bits = &ep->epic_descriptor.Supports;
 558                 dbg("**EPIC descriptor:");
 559                 dbg("  VendEnableSuspend: %s", bits->VendEnableSuspend  ? "TRUE": "FALSE");
 560                 dbg("  IOSPOpen         : %s", bits->IOSPOpen           ? "TRUE": "FALSE" );
 561                 dbg("  IOSPClose        : %s", bits->IOSPClose          ? "TRUE": "FALSE" );
 562                 dbg("  IOSPChase        : %s", bits->IOSPChase          ? "TRUE": "FALSE" );
 563                 dbg("  IOSPSetRxFlow    : %s", bits->IOSPSetRxFlow      ? "TRUE": "FALSE" );
 564                 dbg("  IOSPSetTxFlow    : %s", bits->IOSPSetTxFlow      ? "TRUE": "FALSE" );
 565                 dbg("  IOSPSetXChar     : %s", bits->IOSPSetXChar       ? "TRUE": "FALSE" );
 566                 dbg("  IOSPRxCheck      : %s", bits->IOSPRxCheck        ? "TRUE": "FALSE" );
 567                 dbg("  IOSPSetClrBreak  : %s", bits->IOSPSetClrBreak    ? "TRUE": "FALSE" );
 568                 dbg("  IOSPWriteMCR     : %s", bits->IOSPWriteMCR       ? "TRUE": "FALSE" );
 569                 dbg("  IOSPWriteLCR     : %s", bits->IOSPWriteLCR       ? "TRUE": "FALSE" );
 570                 dbg("  IOSPSetBaudRate  : %s", bits->IOSPSetBaudRate    ? "TRUE": "FALSE" );
 571                 dbg("  TrueEdgeport     : %s", bits->TrueEdgeport       ? "TRUE": "FALSE" );
 572         }
 573
 574         return result;
 575 }
 576
 577
 578 /************************************************************************/
 579 /************************************************************************/
 580 /*            U S B  C A L L B A C K   F U N C T I O N S                */
 581 /*            U S B  C A L L B A C K   F U N C T I O N S                */
 582 /************************************************************************/
 583 /************************************************************************/
 584
 585 /*****************************************************************************
 586  * edge_interrupt_callback
 587  *      this is the callback function for when we have received data on the
 588  *      interrupt endpoint.
 589  *****************************************************************************/
 590 static void edge_interrupt_callback (struct urb *urb)
 591 {
 592         struct edgeport_serial  *edge_serial = (struct edgeport_serial *)urb->context;
 593         struct edgeport_port *edge_port;
 594         struct usb_serial_port *port;
 595         unsigned char *data = urb->transfer_buffer;
 596         int length = urb->actual_length;
 597         int bytes_avail;
 598         int position;
 599         int txCredits;
 600         int portNumber;
 601         int result;
 602         int status = urb->status;
 603
 604         dbg("%s", __FUNCTION__);
 605
 606         switch (status) {
 607         case 0:
 608                 /* success */
 609                 break;
 610         case -ECONNRESET:
 611         case -ENOENT:
 612         case -ESHUTDOWN:
 613                 /* this urb is terminated, clean up */
 614                 dbg("%s - urb shutting down with status: %d",
 615                     __FUNCTION__, status);
 616                 return;
 617         default:
 618                 dbg("%s - nonzero urb status received: %d",
 619                     __FUNCTION__, status);
 620                 goto exit;
 621         }
 622
 623         // process this interrupt-read even if there are no ports open
 624         if (length) {
 625                 usb_serial_debug_data(debug, &edge_serial->serial->dev->dev, __FUNCTION__, length, data);
 626
 627                 if (length > 1) {
 628                         bytes_avail = data[0] | (data[1] << 8);
 629                         if (bytes_avail) {
 630                                 spin_lock(&edge_serial->es_lock);
 631                                 edge_serial->rxBytesAvail += bytes_avail;
 632                                 dbg("%s - bytes_avail=%d, rxBytesAvail=%d, read_in_progress=%d", __FUNCTION__, bytes_avail, edge_serial->rxBytesAvail, edge_serial->read_in_progress);
 633
 634                                 if (edge_serial->rxBytesAvail > 0 &&
 635                                     !edge_serial->read_in_progress) {
 636                                         dbg("%s - posting a read", __FUNCTION__);
 637                                         edge_serial->read_in_progress = true;
 638
 639                                         /* we have pending bytes on the bulk in pipe, send a request */
 640                                         edge_serial->read_urb->dev = edge_serial->serial->dev;
 641                                         result = usb_submit_urb(edge_serial->read_urb, GFP_ATOMIC);
 642                                         if (result) {
 643                                                 dev_err(&edge_serial->serial->dev->dev, "%s - usb_submit_urb(read bulk) failed with result = %d\n", __FUNCTION__, result);
 644                                                 edge_serial->read_in_progress = false;
 645                                         }
 646                                 }
 647                                 spin_unlock(&edge_serial->es_lock);
 648                         }
 649                 }
 650                 /* grab the txcredits for the ports if available */
 651                 position = 2;
 652                 portNumber = 0;
 653                 while ((position < length) && (portNumber < edge_serial->serial->num_ports)) {
 654                         txCredits = data[position] | (data[position+1] << 8);
 655                         if (txCredits) {
 656                                 port = edge_serial->serial->port[portNumber];
 657                                 edge_port = usb_get_serial_port_data(port);
 658                                 if (edge_port->open) {
 659                                         spin_lock(&edge_port->ep_lock);
 660                                         edge_port->txCredits += txCredits;
 661                                         spin_unlock(&edge_port->ep_lock);
 662                                         dbg("%s - txcredits for port%d = %d", __FUNCTION__, portNumber, edge_port->txCredits);
 663
 664                                         /* tell the tty driver that something has changed */
 665                                         if (edge_port->port->tty)
 666                                                 tty_wakeup(edge_port->port->tty);
 667
 668                                         // Since we have more credit, check if more data can be sent
 669                                         send_more_port_data(edge_serial, edge_port);
 670                                 }
 671                         }
 672                         position += 2;
 673                         ++portNumber;
 674                 }
 675         }
 676
 677 exit:
 678         result = usb_submit_urb (urb, GFP_ATOMIC);
 679         if (result) {
 680                 dev_err(&urb->dev->dev, "%s - Error %d submitting control urb\n", __FUNCTION__, result);
 681         }
 682 }
 683
 684
 685 /*****************************************************************************
 686  * edge_bulk_in_callback
 687  *      this is the callback function for when we have received data on the
 688  *      bulk in endpoint.
 689  *****************************************************************************/
 690 static void edge_bulk_in_callback (struct urb *urb)
 691 {
 692         struct edgeport_serial  *edge_serial = (struct edgeport_serial *)urb->context;
 693         unsigned char           *data = urb->transfer_buffer;
 694         int                     retval;
 695         __u16                   raw_data_length;
 696         int status = urb->status;
 697
 698         dbg("%s", __FUNCTION__);
 699
 700         if (status) {
 701                 dbg("%s - nonzero read bulk status received: %d",
 702                     __FUNCTION__, status);
 703                 edge_serial->read_in_progress = false;
 704                 return;
 705         }
 706
 707         if (urb->actual_length == 0) {
 708                 dbg("%s - read bulk callback with no data", __FUNCTION__);
 709                 edge_serial->read_in_progress = false;
 710                 return;
 711         }
 712
 713         raw_data_length = urb->actual_length;
 714
 715         usb_serial_debug_data(debug, &edge_serial->serial->dev->dev, __FUNCTION__, raw_data_length, data);
 716
 717         spin_lock(&edge_serial->es_lock);
 718
 719         /* decrement our rxBytes available by the number that we just got */
 720         edge_serial->rxBytesAvail -= raw_data_length;
 721
 722         dbg("%s - Received = %d, rxBytesAvail %d", __FUNCTION__, raw_data_length, edge_serial->rxBytesAvail);
 723
 724         process_rcvd_data (edge_serial, data, urb->actual_length);
 725
 726         /* check to see if there's any more data for us to read */
 727         if (edge_serial->rxBytesAvail > 0) {
 728                 dbg("%s - posting a read", __FUNCTION__);
 729                 edge_serial->read_urb->dev = edge_serial->serial->dev;
 730                 retval = usb_submit_urb(edge_serial->read_urb, GFP_ATOMIC);
 731                 if (retval) {
 732                         dev_err(&urb->dev->dev,
 733                                 "%s - usb_submit_urb(read bulk) failed, "
 734                                 "retval = %d\n", __FUNCTION__, retval);
 735                         edge_serial->read_in_progress = false;
 736                 }
 737         } else {
 738                 edge_serial->read_in_progress = false;
 739         }
 740
 741         spin_unlock(&edge_serial->es_lock);
 742 }
 743
 744
 745 /*****************************************************************************
 746  * edge_bulk_out_data_callback
 747  *      this is the callback function for when we have finished sending serial data
 748  *      on the bulk out endpoint.
 749  *****************************************************************************/
 750 static void edge_bulk_out_data_callback (struct urb *urb)
 751 {
 752         struct edgeport_port *edge_port = (struct edgeport_port *)urb->context;
 753         struct tty_struct *tty;
 754         int status = urb->status;
 755
 756         dbg("%s", __FUNCTION__);
 757
 758         if (status) {
 759                 dbg("%s - nonzero write bulk status received: %d",
 760                     __FUNCTION__, status);
 761         }
 762
 763         tty = edge_port->port->tty;
 764
 765         if (tty && edge_port->open) {
 766                 /* let the tty driver wakeup if it has a special write_wakeup function */
 767                 tty_wakeup(tty);
 768         }
 769
 770         // Release the Write URB
 771         edge_port->write_in_progress = false;
 772
 773         // Check if more data needs to be sent
 774         send_more_port_data((struct edgeport_serial *)(usb_get_serial_data(edge_port->port->serial)), edge_port);
 775 }
 776
 777
 778 /*****************************************************************************
 779  * BulkOutCmdCallback
 780  *      this is the callback function for when we have finished sending a command
 781  *      on the bulk out endpoint.
 782  *****************************************************************************/
 783 static void edge_bulk_out_cmd_callback (struct urb *urb)
 784 {
 785         struct edgeport_port *edge_port = (struct edgeport_port *)urb->context;
 786         struct tty_struct *tty;
 787         int status = urb->status;
 788
 789         dbg("%s", __FUNCTION__);
 790
 791         atomic_dec(&CmdUrbs);
 792         dbg("%s - FREE URB %p (outstanding %d)", __FUNCTION__, urb, atomic_read(&CmdUrbs));
 793
 794
 795         /* clean up the transfer buffer */
 796         kfree(urb->transfer_buffer);
 797
 798         /* Free the command urb */
 799         usb_free_urb (urb);
 800
 801         if (status) {
 802                 dbg("%s - nonzero write bulk status received: %d", __FUNCTION__, status);
 803                 return;
 804         }
 805
 806         /* Get pointer to tty */
 807         tty = edge_port->port->tty;
 808
 809         /* tell the tty driver that something has changed */
 810         if (tty && edge_port->open)
 811                 tty_wakeup(tty);
 812
 813         /* we have completed the command */
 814         edge_port->commandPending = false;
 815         wake_up(&edge_port->wait_command);
 816 }
 817
 818
 819 /*****************************************************************************
 820  * Driver tty interface functions
 821  *****************************************************************************/
 822
 823 /*****************************************************************************
 824  * SerialOpen
 825  *      this function is called by the tty driver when a port is opened
 826  *      If successful, we return 0
 827  *      Otherwise we return a negative error number.
 828  *****************************************************************************/
 829 static int edge_open (struct usb_serial_port *port, struct file * filp)
 830 {
 831         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
 832         struct usb_serial *serial;
 833         struct edgeport_serial *edge_serial;
 834         int response;
 835
 836         dbg("%s - port %d", __FUNCTION__, port->number);
 837
 838         if (edge_port == NULL)
 839                 return -ENODEV;
 840
 841         if (port->tty)
 842                 port->tty->low_latency = low_latency;
 843
 844         /* see if we've set up our endpoint info yet (can't set it up in edge_startup
 845            as the structures were not set up at that time.) */
 846         serial = port->serial;
 847         edge_serial = usb_get_serial_data(serial);
 848         if (edge_serial == NULL) {
 849                 return -ENODEV;
 850         }
 851         if (edge_serial->interrupt_in_buffer == NULL) {
 852                 struct usb_serial_port *port0 = serial->port[0];
 853
 854                 /* not set up yet, so do it now */
 855                 edge_serial->interrupt_in_buffer = port0->interrupt_in_buffer;
 856                 edge_serial->interrupt_in_endpoint = port0->interrupt_in_endpointAddress;
 857                 edge_serial->interrupt_read_urb = port0->interrupt_in_urb;
 858                 edge_serial->bulk_in_buffer = port0->bulk_in_buffer;
 859                 edge_serial->bulk_in_endpoint = port0->bulk_in_endpointAddress;
 860                 edge_serial->read_urb = port0->read_urb;
 861                 edge_serial->bulk_out_endpoint = port0->bulk_out_endpointAddress;
 862
 863                 /* set up our interrupt urb */
 864                 usb_fill_int_urb(edge_serial->interrupt_read_urb,
 865                                  serial->dev,
 866                                  usb_rcvintpipe(serial->dev,
 867                                                 port0->interrupt_in_endpointAddress),
 868                                  port0->interrupt_in_buffer,
 869                                  edge_serial->interrupt_read_urb->transfer_buffer_length,
 870                                  edge_interrupt_callback, edge_serial,
 871                                  edge_serial->interrupt_read_urb->interval);
 872
 873                 /* set up our bulk in urb */
 874                 usb_fill_bulk_urb(edge_serial->read_urb, serial->dev,
 875                                   usb_rcvbulkpipe(serial->dev,
 876                                                   port0->bulk_in_endpointAddress),
 877                                   port0->bulk_in_buffer,
 878                                   edge_serial->read_urb->transfer_buffer_length,
 879                                   edge_bulk_in_callback, edge_serial);
 880                 edge_serial->read_in_progress = false;
 881
 882                 /* start interrupt read for this edgeport
 883                  * this interrupt will continue as long as the edgeport is connected */
 884                 response = usb_submit_urb (edge_serial->interrupt_read_urb, GFP_KERNEL);
 885                 if (response) {
 886                         dev_err(&port->dev, "%s - Error %d submitting control urb\n", __FUNCTION__, response);
 887                 }
 888         }
 889
 890         /* initialize our wait queues */
 891         init_waitqueue_head(&edge_port->wait_open);
 892         init_waitqueue_head(&edge_port->wait_chase);
 893         init_waitqueue_head(&edge_port->delta_msr_wait);
 894         init_waitqueue_head(&edge_port->wait_command);
 895
 896         /* initialize our icount structure */
 897         memset (&(edge_port->icount), 0x00, sizeof(edge_port->icount));
 898
 899         /* initialize our port settings */
 900         edge_port->txCredits            = 0;                    /* Can't send any data yet */
 901         edge_port->shadowMCR            = MCR_MASTER_IE;        /* Must always set this bit to enable ints! */
 902         edge_port->chaseResponsePending = false;
 903
 904         /* send a open port command */
 905         edge_port->openPending = true;
 906         edge_port->open        = false;
 907         response = send_iosp_ext_cmd (edge_port, IOSP_CMD_OPEN_PORT, 0);
 908
 909         if (response < 0) {
 910                 dev_err(&port->dev, "%s - error sending open port command\n", __FUNCTION__);
 911                 edge_port->openPending = false;
 912                 return -ENODEV;
 913         }
 914
 915         /* now wait for the port to be completely opened */
 916         wait_event_timeout(edge_port->wait_open, !edge_port->openPending, OPEN_TIMEOUT);
 917
 918         if (!edge_port->open) {
 919                 /* open timed out */
 920                 dbg("%s - open timedout", __FUNCTION__);
 921                 edge_port->openPending = false;
 922                 return -ENODEV;
 923         }
 924
 925         /* create the txfifo */
 926         edge_port->txfifo.head  = 0;
 927         edge_port->txfifo.tail  = 0;
 928         edge_port->txfifo.count = 0;
 929         edge_port->txfifo.size  = edge_port->maxTxCredits;
 930         edge_port->txfifo.fifo  = kmalloc (edge_port->maxTxCredits, GFP_KERNEL);
 931
 932         if (!edge_port->txfifo.fifo) {
 933                 dbg("%s - no memory", __FUNCTION__);
 934                 edge_close (port, filp);
 935                 return -ENOMEM;
 936         }
 937
 938         /* Allocate a URB for the write */
 939         edge_port->write_urb = usb_alloc_urb (0, GFP_KERNEL);
 940         edge_port->write_in_progress = false;
 941
 942         if (!edge_port->write_urb) {
 943                 dbg("%s - no memory", __FUNCTION__);
 944                 edge_close (port, filp);
 945                 return -ENOMEM;
 946         }
 947
 948         dbg("%s(%d) - Initialize TX fifo to %d bytes", __FUNCTION__, port->number, edge_port->maxTxCredits);
 949
 950         dbg("%s exited", __FUNCTION__);
 951
 952         return 0;
 953 }
 954
 955
 956 /************************************************************************
 957  *
 958  * block_until_chase_response
 959  *
 960  *      This function will block the close until one of the following:
 961  *              1. Response to our Chase comes from Edgeport
 962  *              2. A timout of 10 seconds without activity has expired
 963  *                 (1K of Edgeport data @ 2400 baud ==> 4 sec to empty)
 964  *
 965  ************************************************************************/
 966 static void block_until_chase_response(struct edgeport_port *edge_port)
 967 {
 968         DEFINE_WAIT(wait);
 969         __u16 lastCredits;
 970         int timeout = 1*HZ;
 971         int loop = 10;
 972
 973         while (1) {
 974                 // Save Last credits
 975                 lastCredits = edge_port->txCredits;
 976
 977                 // Did we get our Chase response
 978                 if (!edge_port->chaseResponsePending) {
 979                         dbg("%s - Got Chase Response", __FUNCTION__);
 980
 981                         // did we get all of our credit back?
 982                         if (edge_port->txCredits == edge_port->maxTxCredits ) {
 983                                 dbg("%s - Got all credits", __FUNCTION__);
 984                                 return;
 985                         }
 986                 }
 987
 988                 // Block the thread for a while
 989                 prepare_to_wait(&edge_port->wait_chase, &wait, TASK_UNINTERRUPTIBLE);
 990                 schedule_timeout(timeout);
 991                 finish_wait(&edge_port->wait_chase, &wait);
 992
 993                 if (lastCredits == edge_port->txCredits) {
 994                         // No activity.. count down.
 995                         loop--;
 996                         if (loop == 0) {
 997                                 edge_port->chaseResponsePending = false;
 998                                 dbg("%s - Chase TIMEOUT", __FUNCTION__);
 999                                 return;
1000                         }
1001                 } else {
1002                         // Reset timout value back to 10 seconds
1003                         dbg("%s - Last %d, Current %d", __FUNCTION__, lastCredits, edge_port->txCredits);
1004                         loop = 10;
1005                 }
1006         }
1007 }
1008
1009
1010 /************************************************************************
1011  *
1012  * block_until_tx_empty
1013  *
1014  *      This function will block the close until one of the following:
1015  *              1. TX count are 0
1016  *              2. The edgeport has stopped
1017  *              3. A timout of 3 seconds without activity has expired
1018  *
1019  ************************************************************************/
1020 static void block_until_tx_empty (struct edgeport_port *edge_port)
1021 {
1022         DEFINE_WAIT(wait);
1023         struct TxFifo *fifo = &edge_port->txfifo;
1024         __u32 lastCount;
1025         int timeout = HZ/10;
1026         int loop = 30;
1027
1028         while (1) {
1029                 // Save Last count
1030                 lastCount = fifo->count;
1031
1032                 // Is the Edgeport Buffer empty?
1033                 if (lastCount == 0) {
1034                         dbg("%s - TX Buffer Empty", __FUNCTION__);
1035                         return;
1036                 }
1037
1038                 // Block the thread for a while
1039                 prepare_to_wait (&edge_port->wait_chase, &wait, TASK_UNINTERRUPTIBLE);
1040                 schedule_timeout(timeout);
1041                 finish_wait(&edge_port->wait_chase, &wait);
1042
1043                 dbg("%s wait", __FUNCTION__);
1044
1045                 if (lastCount == fifo->count) {
1046                         // No activity.. count down.
1047                         loop--;
1048                         if (loop == 0) {
1049                                 dbg("%s - TIMEOUT", __FUNCTION__);
1050                                 return;
1051                         }
1052                 } else {
1053                         // Reset timout 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, struct file * filp)
1065 {
1066         struct edgeport_serial *edge_serial;
1067         struct edgeport_port *edge_port;
1068         int status;
1069
1070         dbg("%s - port %d", __FUNCTION__, port->number);
1071
1072         edge_serial = usb_get_serial_data(port->serial);
1073         edge_port = usb_get_serial_port_data(port);
1074         if ((edge_serial == NULL) || (edge_port == NULL))
1075                 return;
1076
1077         // block until tx is empty
1078         block_until_tx_empty(edge_port);
1079
1080         edge_port->closePending = true;
1081
1082         if ((!edge_serial->is_epic) ||
1083             ((edge_serial->is_epic) &&
1084              (edge_serial->epic_descriptor.Supports.IOSPChase))) {
1085                 /* flush and chase */
1086                 edge_port->chaseResponsePending = true;
1087
1088                 dbg("%s - Sending IOSP_CMD_CHASE_PORT", __FUNCTION__);
1089                 status = send_iosp_ext_cmd (edge_port, IOSP_CMD_CHASE_PORT, 0);
1090                 if (status == 0) {
1091                         // block until chase finished
1092                         block_until_chase_response(edge_port);
1093                 } else {
1094                         edge_port->chaseResponsePending = false;
1095                 }
1096         }
1097
1098         if ((!edge_serial->is_epic) ||
1099             ((edge_serial->is_epic) &&
1100              (edge_serial->epic_descriptor.Supports.IOSPClose))) {
1101                /* close the port */
1102                 dbg("%s - Sending IOSP_CMD_CLOSE_PORT", __FUNCTION__);
1103                 send_iosp_ext_cmd (edge_port, IOSP_CMD_CLOSE_PORT, 0);
1104         }
1105
1106         //port->close = true;
1107         edge_port->closePending = false;
1108         edge_port->open = false;
1109         edge_port->openPending = false;
1110
1111         usb_kill_urb(edge_port->write_urb);
1112
1113         if (edge_port->write_urb) {
1114                 /* if this urb had a transfer buffer already (old transfer) free it */
1115                 kfree(edge_port->write_urb->transfer_buffer);
1116                 usb_free_urb(edge_port->write_urb);
1117                 edge_port->write_urb = NULL;
1118         }
1119         kfree(edge_port->txfifo.fifo);
1120         edge_port->txfifo.fifo = NULL;
1121
1122         dbg("%s exited", __FUNCTION__);
1123 }
1124
1125 /*****************************************************************************
1126  * SerialWrite
1127  *      this function is called by the tty driver when data should be written to
1128  *      the port.
1129  *      If successful, we return the number of bytes written, otherwise we return
1130  *      a negative error number.
1131  *****************************************************************************/
1132 static int edge_write (struct usb_serial_port *port, const unsigned char *data, int count)
1133 {
1134         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1135         struct TxFifo *fifo;
1136         int copySize;
1137         int bytesleft;
1138         int firsthalf;
1139         int secondhalf;
1140         unsigned long flags;
1141
1142         dbg("%s - port %d", __FUNCTION__, port->number);
1143
1144         if (edge_port == NULL)
1145                 return -ENODEV;
1146
1147         // get a pointer to the Tx fifo
1148         fifo = &edge_port->txfifo;
1149
1150         spin_lock_irqsave(&edge_port->ep_lock, flags);
1151
1152         // calculate number of bytes to put in fifo
1153         copySize = min ((unsigned int)count, (edge_port->txCredits - fifo->count));
1154
1155         dbg("%s(%d) of %d byte(s) Fifo room  %d -- will copy %d bytes", __FUNCTION__,
1156             port->number, count, edge_port->txCredits - fifo->count, copySize);
1157
1158         /* catch writes of 0 bytes which the tty driver likes to give us, and when txCredits is empty */
1159         if (copySize == 0) {
1160                 dbg("%s - copySize = Zero", __FUNCTION__);
1161                 goto finish_write;
1162         }
1163
1164         // queue the data
1165         // since we can never overflow the buffer we do not have to check for full condition
1166
1167         // the copy is done is two parts -- first fill to the end of the buffer
1168         // then copy the reset from the start of the buffer
1169
1170         bytesleft = fifo->size - fifo->head;
1171         firsthalf = min (bytesleft, copySize);
1172         dbg("%s - copy %d bytes of %d into fifo ", __FUNCTION__, firsthalf, bytesleft);
1173
1174         /* now copy our data */
1175         memcpy(&fifo->fifo[fifo->head], data, firsthalf);
1176         usb_serial_debug_data(debug, &port->dev, __FUNCTION__, 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
1187         secondhalf = copySize-firsthalf;
1188
1189         if (secondhalf) {
1190                 dbg("%s - copy rest of data %d", __FUNCTION__, secondhalf);
1191                 memcpy(&fifo->fifo[fifo->head], &data[firsthalf], secondhalf);
1192                 usb_serial_debug_data(debug, &port->dev, __FUNCTION__, secondhalf, &fifo->fifo[fifo->head]);
1193                 // update the index and size
1194                 fifo->count += secondhalf;
1195                 fifo->head  += secondhalf;
1196                 // No need to check for wrap since we can not get to end of fifo in this part
1197         }
1198
1199 finish_write:
1200         spin_unlock_irqrestore(&edge_port->ep_lock, flags);
1201
1202         send_more_port_data((struct edgeport_serial *)usb_get_serial_data(port->serial), edge_port);
1203
1204         dbg("%s wrote %d byte(s) TxCredits %d, Fifo %d", __FUNCTION__, copySize, edge_port->txCredits, fifo->count);
1205
1206         return copySize;
1207 }
1208
1209
1210 /************************************************************************
1211  *
1212  * send_more_port_data()
1213  *
1214  *      This routine attempts to write additional UART transmit data
1215  *      to a port over the USB bulk pipe. It is called (1) when new
1216  *      data has been written to a port's TxBuffer from higher layers
1217  *      (2) when the peripheral sends us additional TxCredits indicating
1218  *      that it can accept more Tx data for a given port; and (3) when
1219  *      a bulk write completes successfully and we want to see if we
1220  *      can transmit more.
1221  *
1222  ************************************************************************/
1223 static void send_more_port_data(struct edgeport_serial *edge_serial, struct edgeport_port *edge_port)
1224 {
1225         struct TxFifo   *fifo = &edge_port->txfifo;
1226         struct urb      *urb;
1227         unsigned char   *buffer;
1228         int             status;
1229         int             count;
1230         int             bytesleft;
1231         int             firsthalf;
1232         int             secondhalf;
1233         unsigned long   flags;
1234
1235         dbg("%s(%d)", __FUNCTION__, edge_port->port->number);
1236
1237         spin_lock_irqsave(&edge_port->ep_lock, flags);
1238
1239         if (edge_port->write_in_progress ||
1240             !edge_port->open             ||
1241             (fifo->count == 0)) {
1242                 dbg("%s(%d) EXIT - fifo %d, PendingWrite = %d", __FUNCTION__, edge_port->port->number, fifo->count, edge_port->write_in_progress);
1243                 goto exit_send;
1244         }
1245
1246         // since the amount of data in the fifo will always fit into the
1247         // edgeport buffer we do not need to check the write length
1248
1249         //      Do we have enough credits for this port to make it worthwhile
1250         //      to bother queueing a write. If it's too small, say a few bytes,
1251         //      it's better to wait for more credits so we can do a larger
1252         //      write.
1253         if (edge_port->txCredits < EDGE_FW_GET_TX_CREDITS_SEND_THRESHOLD(edge_port->maxTxCredits,EDGE_FW_BULK_MAX_PACKET_SIZE)) {
1254                 dbg("%s(%d) Not enough credit - fifo %d TxCredit %d", __FUNCTION__, edge_port->port->number, fifo->count, edge_port->txCredits );
1255                 goto exit_send;
1256         }
1257
1258         // lock this write
1259         edge_port->write_in_progress = true;
1260
1261         // get a pointer to the write_urb
1262         urb = edge_port->write_urb;
1263
1264         /* make sure transfer buffer is freed */
1265         kfree(urb->transfer_buffer);
1266         urb->transfer_buffer = NULL;
1267
1268         /* build the data header for the buffer and port that we are about to send out */
1269         count = fifo->count;
1270         buffer = kmalloc (count+2, GFP_ATOMIC);
1271         if (buffer == NULL) {
1272                 dev_err(&edge_port->port->dev, "%s - no more kernel memory...\n", __FUNCTION__);
1273                 edge_port->write_in_progress = false;
1274                 goto exit_send;
1275         }
1276         buffer[0] = IOSP_BUILD_DATA_HDR1 (edge_port->port->number - edge_port->port->serial->minor, count);
1277         buffer[1] = IOSP_BUILD_DATA_HDR2 (edge_port->port->number - edge_port->port->serial->minor, count);
1278
1279         /* now copy our data */
1280         bytesleft =  fifo->size - fifo->tail;
1281         firsthalf = min (bytesleft, count);
1282         memcpy(&buffer[2], &fifo->fifo[fifo->tail], firsthalf);
1283         fifo->tail  += firsthalf;
1284         fifo->count -= firsthalf;
1285         if (fifo->tail == fifo->size) {
1286                 fifo->tail = 0;
1287         }
1288
1289         secondhalf = count-firsthalf;
1290         if (secondhalf) {
1291                 memcpy(&buffer[2+firsthalf], &fifo->fifo[fifo->tail], secondhalf);
1292                 fifo->tail  += secondhalf;
1293                 fifo->count -= secondhalf;
1294         }
1295
1296         if (count)
1297                 usb_serial_debug_data(debug, &edge_port->port->dev, __FUNCTION__, count, &buffer[2]);
1298
1299         /* fill up the urb with all of our data and submit it */
1300         usb_fill_bulk_urb (urb, edge_serial->serial->dev,
1301                        usb_sndbulkpipe(edge_serial->serial->dev, edge_serial->bulk_out_endpoint),
1302                        buffer, count+2, edge_bulk_out_data_callback, edge_port);
1303
1304         /* decrement the number of credits we have by the number we just sent */
1305         edge_port->txCredits -= count;
1306         edge_port->icount.tx += count;
1307
1308         urb->dev = edge_serial->serial->dev;
1309         status = usb_submit_urb(urb, GFP_ATOMIC);
1310         if (status) {
1311                 /* something went wrong */
1312                 dev_err(&edge_port->port->dev, "%s - usb_submit_urb(write bulk) failed, status = %d, data lost\n", __FUNCTION__, status);
1313                 edge_port->write_in_progress = false;
1314
1315                 /* revert the credits as something bad happened. */
1316                 edge_port->txCredits += count;
1317                 edge_port->icount.tx -= count;
1318         }
1319         dbg("%s wrote %d byte(s) TxCredit %d, Fifo %d", __FUNCTION__, count, edge_port->txCredits, fifo->count);
1320
1321 exit_send:
1322         spin_unlock_irqrestore(&edge_port->ep_lock, flags);
1323 }
1324
1325
1326 /*****************************************************************************
1327  * edge_write_room
1328  *      this function is called by the tty driver when it wants to know how many
1329  *      bytes of data we can accept for a specific port.
1330  *      If successful, we return the amount of room that we have for this port
1331  *      (the txCredits),
1332  *      Otherwise we return a negative error number.
1333  *****************************************************************************/
1334 static int edge_write_room (struct usb_serial_port *port)
1335 {
1336         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1337         int room;
1338         unsigned long flags;
1339
1340         dbg("%s", __FUNCTION__);
1341
1342         if (edge_port == NULL)
1343                 return -ENODEV;
1344         if (edge_port->closePending)
1345                 return -ENODEV;
1346
1347         dbg("%s - port %d", __FUNCTION__, port->number);
1348
1349         if (!edge_port->open) {
1350                 dbg("%s - port not opened", __FUNCTION__);
1351                 return -EINVAL;
1352         }
1353
1354         // total of both buffers is still txCredit
1355         spin_lock_irqsave(&edge_port->ep_lock, flags);
1356         room = edge_port->txCredits - edge_port->txfifo.count;
1357         spin_unlock_irqrestore(&edge_port->ep_lock, flags);
1358
1359         dbg("%s - returns %d", __FUNCTION__, room);
1360         return room;
1361 }
1362
1363
1364 /*****************************************************************************
1365  * edge_chars_in_buffer
1366  *      this function is called by the tty driver when it wants to know how many
1367  *      bytes of data we currently have outstanding in the port (data that has
1368  *      been written, but hasn't made it out the port yet)
1369  *      If successful, we return the number of bytes left to be written in the
1370  *      system,
1371  *      Otherwise we return a negative error number.
1372  *****************************************************************************/
1373 static int edge_chars_in_buffer (struct usb_serial_port *port)
1374 {
1375         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1376         int num_chars;
1377         unsigned long flags;
1378
1379         dbg("%s", __FUNCTION__);
1380
1381         if (edge_port == NULL)
1382                 return -ENODEV;
1383         if (edge_port->closePending)
1384                 return -ENODEV;
1385
1386         if (!edge_port->open) {
1387                 dbg("%s - port not opened", __FUNCTION__);
1388                 return -EINVAL;
1389         }
1390
1391         spin_lock_irqsave(&edge_port->ep_lock, flags);
1392         num_chars = edge_port->maxTxCredits - edge_port->txCredits + edge_port->txfifo.count;
1393         spin_unlock_irqrestore(&edge_port->ep_lock, flags);
1394         if (num_chars) {
1395                 dbg("%s(port %d) - returns %d", __FUNCTION__, port->number, num_chars);
1396         }
1397
1398         return num_chars;
1399 }
1400
1401
1402 /*****************************************************************************
1403  * SerialThrottle
1404  *      this function is called by the tty driver when it wants to stop the data
1405  *      being read from the port.
1406  *****************************************************************************/
1407 static void edge_throttle (struct usb_serial_port *port)
1408 {
1409         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1410         struct tty_struct *tty;
1411         int status;
1412
1413         dbg("%s - port %d", __FUNCTION__, port->number);
1414
1415         if (edge_port == NULL)
1416                 return;
1417
1418         if (!edge_port->open) {
1419                 dbg("%s - port not opened", __FUNCTION__);
1420                 return;
1421         }
1422
1423         tty = port->tty;
1424         if (!tty) {
1425                 dbg ("%s - no tty available", __FUNCTION__);
1426                 return;
1427         }
1428
1429         /* if we are implementing XON/XOFF, send the stop character */
1430         if (I_IXOFF(tty)) {
1431                 unsigned char stop_char = STOP_CHAR(tty);
1432                 status = edge_write (port, &stop_char, 1);
1433                 if (status <= 0) {
1434                         return;
1435                 }
1436         }
1437
1438         /* if we are implementing RTS/CTS, toggle that line */
1439         if (tty->termios->c_cflag & CRTSCTS) {
1440                 edge_port->shadowMCR &= ~MCR_RTS;
1441                 status = send_cmd_write_uart_register(edge_port, MCR, edge_port->shadowMCR);
1442                 if (status != 0) {
1443                         return;
1444                 }
1445         }
1446
1447         return;
1448 }
1449
1450
1451 /*****************************************************************************
1452  * edge_unthrottle
1453  *      this function is called by the tty driver when it wants to resume the data
1454  *      being read from the port (called after SerialThrottle is called)
1455  *****************************************************************************/
1456 static void edge_unthrottle (struct usb_serial_port *port)
1457 {
1458         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1459         struct tty_struct *tty;
1460         int status;
1461
1462         dbg("%s - port %d", __FUNCTION__, port->number);
1463
1464         if (edge_port == NULL)
1465                 return;
1466
1467         if (!edge_port->open) {
1468                 dbg("%s - port not opened", __FUNCTION__);
1469                 return;
1470         }
1471
1472         tty = port->tty;
1473         if (!tty) {
1474                 dbg ("%s - no tty available", __FUNCTION__);
1475                 return;
1476         }
1477
1478         /* if we are implementing XON/XOFF, send the start character */
1479         if (I_IXOFF(tty)) {
1480                 unsigned char start_char = START_CHAR(tty);
1481                 status = edge_write (port, &start_char, 1);
1482                 if (status <= 0) {
1483                         return;
1484                 }
1485         }
1486
1487         /* if we are implementing RTS/CTS, toggle that line */
1488         if (tty->termios->c_cflag & CRTSCTS) {
1489                 edge_port->shadowMCR |= MCR_RTS;
1490                 status = send_cmd_write_uart_register(edge_port, MCR, edge_port->shadowMCR);
1491                 if (status != 0) {
1492                         return;
1493                 }
1494         }
1495
1496         return;
1497 }
1498
1499
1500 /*****************************************************************************
1501  * SerialSetTermios
1502  *      this function is called by the tty driver when it wants to change the termios structure
1503  *****************************************************************************/
1504 static void edge_set_termios (struct usb_serial_port *port, struct ktermios *old_termios)
1505 {
1506         /* FIXME: This function appears unused ?? */
1507         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1508         struct tty_struct *tty = port->tty;
1509         unsigned int cflag;
1510
1511         cflag = tty->termios->c_cflag;
1512         dbg("%s - clfag %08x iflag %08x", __FUNCTION__,
1513             tty->termios->c_cflag, tty->termios->c_iflag);
1514         dbg("%s - old clfag %08x old iflag %08x", __FUNCTION__,
1515             old_termios->c_cflag, old_termios->c_iflag);
1516
1517         dbg("%s - port %d", __FUNCTION__, port->number);
1518
1519         if (edge_port == NULL)
1520                 return;
1521
1522         if (!edge_port->open) {
1523                 dbg("%s - port not opened", __FUNCTION__);
1524                 return;
1525         }
1526
1527         /* change the port settings to the new ones specified */
1528         change_port_settings (edge_port, old_termios);
1529
1530         return;
1531 }
1532
1533
1534 /*****************************************************************************
1535  * get_lsr_info - get line status register info
1536  *
1537  * Purpose: Let user call ioctl() to get info when the UART physically
1538  *          is emptied.  On bus types like RS485, the transmitter must
1539  *          release the bus after transmitting. This must be done when
1540  *          the transmit shift register is empty, not be done when the
1541  *          transmit holding register is empty.  This functionality
1542  *          allows an RS485 driver to be written in user space.
1543  *****************************************************************************/
1544 static int get_lsr_info(struct edgeport_port *edge_port, unsigned int __user *value)
1545 {
1546         unsigned int result = 0;
1547         unsigned long flags;
1548
1549         spin_lock_irqsave(&edge_port->ep_lock, flags);
1550         if (edge_port->maxTxCredits == edge_port->txCredits &&
1551             edge_port->txfifo.count == 0) {
1552                 dbg("%s -- Empty", __FUNCTION__);
1553                 result = TIOCSER_TEMT;
1554         }
1555         spin_unlock_irqrestore(&edge_port->ep_lock, flags);
1556
1557         if (copy_to_user(value, &result, sizeof(int)))
1558                 return -EFAULT;
1559         return 0;
1560 }
1561
1562 static int get_number_bytes_avail(struct edgeport_port *edge_port, unsigned int __user *value)
1563 {
1564         unsigned int result = 0;
1565         struct tty_struct *tty = edge_port->port->tty;
1566
1567         if (!tty)
1568                 return -ENOIOCTLCMD;
1569
1570         result = tty->read_cnt;
1571
1572         dbg("%s(%d) = %d", __FUNCTION__,  edge_port->port->number, result);
1573         if (copy_to_user(value, &result, sizeof(int)))
1574                 return -EFAULT;
1575         //return 0;
1576         return -ENOIOCTLCMD;
1577 }
1578
1579 static int edge_tiocmset (struct usb_serial_port *port, struct file *file, unsigned int set, unsigned int clear)
1580 {
1581         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1582         unsigned int mcr;
1583
1584         dbg("%s - port %d", __FUNCTION__, port->number);
1585
1586         mcr = edge_port->shadowMCR;
1587         if (set & TIOCM_RTS)
1588                 mcr |= MCR_RTS;
1589         if (set & TIOCM_DTR)
1590                 mcr |= MCR_DTR;
1591         if (set & TIOCM_LOOP)
1592                 mcr |= MCR_LOOPBACK;
1593
1594         if (clear & TIOCM_RTS)
1595                 mcr &= ~MCR_RTS;
1596         if (clear & TIOCM_DTR)
1597                 mcr &= ~MCR_DTR;
1598         if (clear & TIOCM_LOOP)
1599                 mcr &= ~MCR_LOOPBACK;
1600
1601         edge_port->shadowMCR = mcr;
1602
1603         send_cmd_write_uart_register(edge_port, MCR, edge_port->shadowMCR);
1604
1605         return 0;
1606 }
1607
1608 static int edge_tiocmget(struct usb_serial_port *port, struct file *file)
1609 {
1610         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1611         unsigned int result = 0;
1612         unsigned int msr;
1613         unsigned int mcr;
1614
1615         dbg("%s - port %d", __FUNCTION__, port->number);
1616
1617         msr = edge_port->shadowMSR;
1618         mcr = edge_port->shadowMCR;
1619         result = ((mcr & MCR_DTR)       ? TIOCM_DTR: 0)   /* 0x002 */
1620                   | ((mcr & MCR_RTS)    ? TIOCM_RTS: 0)   /* 0x004 */
1621                   | ((msr & EDGEPORT_MSR_CTS)   ? TIOCM_CTS: 0)   /* 0x020 */
1622                   | ((msr & EDGEPORT_MSR_CD)    ? TIOCM_CAR: 0)   /* 0x040 */
1623                   | ((msr & EDGEPORT_MSR_RI)    ? TIOCM_RI:  0)   /* 0x080 */
1624                   | ((msr & EDGEPORT_MSR_DSR)   ? TIOCM_DSR: 0);  /* 0x100 */
1625
1626
1627         dbg("%s -- %x", __FUNCTION__, result);
1628
1629         return result;
1630 }
1631
1632 static int get_serial_info(struct edgeport_port *edge_port, struct serial_struct __user *retinfo)
1633 {
1634         struct serial_struct tmp;
1635
1636         if (!retinfo)
1637                 return -EFAULT;
1638
1639         memset(&tmp, 0, sizeof(tmp));
1640
1641         tmp.type                = PORT_16550A;
1642         tmp.line                = edge_port->port->serial->minor;
1643         tmp.port                = edge_port->port->number;
1644         tmp.irq                 = 0;
1645         tmp.flags               = ASYNC_SKIP_TEST | ASYNC_AUTO_IRQ;
1646         tmp.xmit_fifo_size      = edge_port->maxTxCredits;
1647         tmp.baud_base           = 9600;
1648         tmp.close_delay         = 5*HZ;
1649         tmp.closing_wait        = 30*HZ;
1650 //      tmp.custom_divisor      = state->custom_divisor;
1651 //      tmp.hub6                = state->hub6;
1652 //      tmp.io_type             = state->io_type;
1653
1654         if (copy_to_user(retinfo, &tmp, sizeof(*retinfo)))
1655                 return -EFAULT;
1656         return 0;
1657 }
1658
1659
1660
1661 /*****************************************************************************
1662  * SerialIoctl
1663  *      this function handles any ioctl calls to the driver
1664  *****************************************************************************/
1665 static int edge_ioctl (struct usb_serial_port *port, struct file *file, unsigned int cmd, unsigned long arg)
1666 {
1667         DEFINE_WAIT(wait);
1668         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1669         struct async_icount cnow;
1670         struct async_icount cprev;
1671         struct serial_icounter_struct icount;
1672
1673         dbg("%s - port %d, cmd = 0x%x", __FUNCTION__, port->number, cmd);
1674
1675         switch (cmd) {
1676                 // return number of bytes available
1677                 case TIOCINQ:
1678                         dbg("%s (%d) TIOCINQ", __FUNCTION__,  port->number);
1679                         return get_number_bytes_avail(edge_port, (unsigned int __user *) arg);
1680                         break;
1681
1682                 case TIOCSERGETLSR:
1683                         dbg("%s (%d) TIOCSERGETLSR", __FUNCTION__,  port->number);
1684                         return get_lsr_info(edge_port, (unsigned int __user *) arg);
1685                         return 0;
1686
1687                 case TIOCGSERIAL:
1688                         dbg("%s (%d) TIOCGSERIAL", __FUNCTION__,  port->number);
1689                         return get_serial_info(edge_port, (struct serial_struct __user *) arg);
1690
1691                 case TIOCSSERIAL:
1692                         dbg("%s (%d) TIOCSSERIAL", __FUNCTION__,  port->number);
1693                         break;
1694
1695                 case TIOCMIWAIT:
1696                         dbg("%s (%d) TIOCMIWAIT", __FUNCTION__,  port->number);
1697                         cprev = edge_port->icount;
1698                         while (1) {
1699                                 prepare_to_wait(&edge_port->delta_msr_wait, &wait, TASK_INTERRUPTIBLE);
1700                                 schedule();
1701                                 finish_wait(&edge_port->delta_msr_wait, &wait);
1702                                 /* see if a signal did it */
1703                                 if (signal_pending(current))
1704                                         return -ERESTARTSYS;
1705                                 cnow = edge_port->icount;
1706                                 if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr &&
1707                                     cnow.dcd == cprev.dcd && cnow.cts == cprev.cts)
1708                                         return -EIO; /* no change => error */
1709                                 if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
1710                                     ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
1711                                     ((arg & TIOCM_CD)  && (cnow.dcd != cprev.dcd)) ||
1712                                     ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts)) ) {
1713                                         return 0;
1714                                 }
1715                                 cprev = cnow;
1716                         }
1717                         /* NOTREACHED */
1718                         break;
1719
1720                 case TIOCGICOUNT:
1721                         cnow = edge_port->icount;
1722                         memset(&icount, 0, sizeof(icount));
1723                         icount.cts = cnow.cts;
1724                         icount.dsr = cnow.dsr;
1725                         icount.rng = cnow.rng;
1726                         icount.dcd = cnow.dcd;
1727                         icount.rx = cnow.rx;
1728                         icount.tx = cnow.tx;
1729                         icount.frame = cnow.frame;
1730                         icount.overrun = cnow.overrun;
1731                         icount.parity = cnow.parity;
1732                         icount.brk = cnow.brk;
1733                         icount.buf_overrun = cnow.buf_overrun;
1734
1735                         dbg("%s (%d) TIOCGICOUNT RX=%d, TX=%d", __FUNCTION__,  port->number, icount.rx, icount.tx );
1736                         if (copy_to_user((void __user *)arg, &icount, sizeof(icount)))
1737                                 return -EFAULT;
1738                         return 0;
1739         }
1740
1741         return -ENOIOCTLCMD;
1742 }
1743
1744
1745 /*****************************************************************************
1746  * SerialBreak
1747  *      this function sends a break to the port
1748  *****************************************************************************/
1749 static void edge_break (struct usb_serial_port *port, int break_state)
1750 {
1751         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1752         struct edgeport_serial *edge_serial = usb_get_serial_data(port->serial);
1753         int status;
1754
1755         if ((!edge_serial->is_epic) ||
1756             ((edge_serial->is_epic) &&
1757              (edge_serial->epic_descriptor.Supports.IOSPChase))) {
1758                 /* flush and chase */
1759                 edge_port->chaseResponsePending = true;
1760
1761                 dbg("%s - Sending IOSP_CMD_CHASE_PORT", __FUNCTION__);
1762                 status = send_iosp_ext_cmd (edge_port, IOSP_CMD_CHASE_PORT, 0);
1763                 if (status == 0) {
1764                         // block until chase finished
1765                         block_until_chase_response(edge_port);
1766                 } else {
1767                         edge_port->chaseResponsePending = false;
1768                 }
1769         }
1770
1771         if ((!edge_serial->is_epic) ||
1772             ((edge_serial->is_epic) &&
1773              (edge_serial->epic_descriptor.Supports.IOSPSetClrBreak))) {
1774                 if (break_state == -1) {
1775                         dbg("%s - Sending IOSP_CMD_SET_BREAK", __FUNCTION__);
1776                         status = send_iosp_ext_cmd (edge_port, IOSP_CMD_SET_BREAK, 0);
1777                 } else {
1778                         dbg("%s - Sending IOSP_CMD_CLEAR_BREAK", __FUNCTION__);
1779                         status = send_iosp_ext_cmd (edge_port, IOSP_CMD_CLEAR_BREAK, 0);
1780                 }
1781                 if (status) {
1782                         dbg("%s - error sending break set/clear command.", __FUNCTION__);
1783                 }
1784         }
1785
1786         return;
1787 }
1788
1789
1790 /*****************************************************************************
1791  * process_rcvd_data
1792  *      this function handles the data received on the bulk in pipe.
1793  *****************************************************************************/
1794 static void process_rcvd_data (struct edgeport_serial *edge_serial, unsigned char * buffer, __u16 bufferLength)
1795 {
1796         struct usb_serial_port *port;
1797         struct edgeport_port *edge_port;
1798         struct tty_struct *tty;
1799         __u16 lastBufferLength;
1800         __u16 rxLen;
1801
1802         dbg("%s", __FUNCTION__);
1803
1804         lastBufferLength = bufferLength + 1;
1805
1806         while (bufferLength > 0) {
1807                 /* failsafe incase we get a message that we don't understand */
1808                 if (lastBufferLength == bufferLength) {
1809                         dbg("%s - stuck in loop, exiting it.", __FUNCTION__);
1810                         break;
1811                 }
1812                 lastBufferLength = bufferLength;
1813
1814                 switch (edge_serial->rxState) {
1815                         case EXPECT_HDR1:
1816                                 edge_serial->rxHeader1 = *buffer;
1817                                 ++buffer;
1818                                 --bufferLength;
1819
1820                                 if (bufferLength == 0) {
1821                                         edge_serial->rxState = EXPECT_HDR2;
1822                                         break;
1823                                 }
1824                                 /* otherwise, drop on through */
1825
1826                         case EXPECT_HDR2:
1827                                 edge_serial->rxHeader2 = *buffer;
1828                                 ++buffer;
1829                                 --bufferLength;
1830
1831                                 dbg("%s - Hdr1=%02X Hdr2=%02X", __FUNCTION__, edge_serial->rxHeader1, edge_serial->rxHeader2);
1832
1833                                 // Process depending on whether this header is
1834                                 // data or status
1835
1836                                 if (IS_CMD_STAT_HDR(edge_serial->rxHeader1)) {
1837                                         // Decode this status header and goto EXPECT_HDR1 (if we
1838                                         // can process the status with only 2 bytes), or goto
1839                                         // EXPECT_HDR3 to get the third byte.
1840
1841                                         edge_serial->rxPort       = IOSP_GET_HDR_PORT(edge_serial->rxHeader1);
1842                                         edge_serial->rxStatusCode = IOSP_GET_STATUS_CODE(edge_serial->rxHeader1);
1843
1844                                         if (!IOSP_STATUS_IS_2BYTE(edge_serial->rxStatusCode)) {
1845                                                 // This status needs additional bytes. Save what we have
1846                                                 // and then wait for more data.
1847                                                 edge_serial->rxStatusParam = edge_serial->rxHeader2;
1848
1849                                                 edge_serial->rxState = EXPECT_HDR3;
1850                                                 break;
1851                                         }
1852
1853                                         // We have all the header bytes, process the status now
1854                                         process_rcvd_status (edge_serial, edge_serial->rxHeader2, 0);
1855                                         edge_serial->rxState = EXPECT_HDR1;
1856                                         break;
1857                                 } else {
1858                                         edge_serial->rxPort = IOSP_GET_HDR_PORT(edge_serial->rxHeader1);
1859                                         edge_serial->rxBytesRemaining = IOSP_GET_HDR_DATA_LEN(edge_serial->rxHeader1, edge_serial->rxHeader2);
1860
1861                                         dbg("%s - Data for Port %u Len %u", __FUNCTION__, edge_serial->rxPort, edge_serial->rxBytesRemaining);
1862
1863                                         //ASSERT( DevExt->RxPort < DevExt->NumPorts );
1864                                         //ASSERT( DevExt->RxBytesRemaining < IOSP_MAX_DATA_LENGTH );
1865
1866                                         if (bufferLength == 0 ) {
1867                                                 edge_serial->rxState = EXPECT_DATA;
1868                                                 break;
1869                                         }
1870                                         // Else, drop through
1871                                 }
1872
1873                         case EXPECT_DATA:       // Expect data
1874
1875                                 if (bufferLength < edge_serial->rxBytesRemaining) {
1876                                         rxLen = bufferLength;
1877                                         edge_serial->rxState = EXPECT_DATA;     // Expect data to start next buffer
1878                                 } else {
1879                                         // BufLen >= RxBytesRemaining
1880                                         rxLen = edge_serial->rxBytesRemaining;
1881                                         edge_serial->rxState = EXPECT_HDR1;     // Start another header next time
1882                                 }
1883
1884                                 bufferLength -= rxLen;
1885                                 edge_serial->rxBytesRemaining -= rxLen;
1886
1887                                 /* spit this data back into the tty driver if this port is open */
1888                                 if (rxLen) {
1889                                         port = edge_serial->serial->port[edge_serial->rxPort];
1890                                         edge_port = usb_get_serial_port_data(port);
1891                                         if (edge_port->open) {
1892                                                 tty = edge_port->port->tty;
1893                                                 if (tty) {
1894                                                         dbg("%s - Sending %d bytes to TTY for port %d", __FUNCTION__, rxLen, edge_serial->rxPort);
1895                                                         edge_tty_recv(&edge_serial->serial->dev->dev, tty, buffer, rxLen);
1896                                                 }
1897                                                 edge_port->icount.rx += rxLen;
1898                                         }
1899                                         buffer += rxLen;
1900                                 }
1901
1902                                 break;
1903
1904                         case EXPECT_HDR3:                       // Expect 3rd byte of status header
1905                                 edge_serial->rxHeader3 = *buffer;
1906                                 ++buffer;
1907                                 --bufferLength;
1908
1909                                 // We have all the header bytes, process the status now
1910                                 process_rcvd_status (edge_serial, edge_serial->rxStatusParam, edge_serial->rxHeader3);
1911                                 edge_serial->rxState = EXPECT_HDR1;
1912                                 break;
1913
1914                 }
1915         }
1916 }
1917
1918
1919 /*****************************************************************************
1920  * process_rcvd_status
1921  *      this function handles the any status messages received on the bulk in pipe.
1922  *****************************************************************************/
1923 static void process_rcvd_status (struct edgeport_serial *edge_serial, __u8 byte2, __u8 byte3)
1924 {
1925         struct usb_serial_port *port;
1926         struct edgeport_port *edge_port;
1927         __u8 code = edge_serial->rxStatusCode;
1928
1929         /* switch the port pointer to the one being currently talked about */
1930         port = edge_serial->serial->port[edge_serial->rxPort];
1931         edge_port = usb_get_serial_port_data(port);
1932         if (edge_port == NULL) {
1933                 dev_err(&edge_serial->serial->dev->dev, "%s - edge_port == NULL for port %d\n", __FUNCTION__, edge_serial->rxPort);
1934                 return;
1935         }
1936
1937         dbg("%s - port %d", __FUNCTION__, edge_serial->rxPort);
1938
1939         if (code == IOSP_EXT_STATUS) {
1940                 switch (byte2) {
1941                         case IOSP_EXT_STATUS_CHASE_RSP:
1942                                 // we want to do EXT status regardless of port open/closed
1943                                 dbg("%s - Port %u EXT CHASE_RSP Data = %02x", __FUNCTION__, edge_serial->rxPort, byte3 );
1944                                 // Currently, the only EXT_STATUS is Chase, so process here instead of one more call
1945                                 // to one more subroutine. If/when more EXT_STATUS, there'll be more work to do.
1946                                 // Also, we currently clear flag and close the port regardless of content of above's Byte3.
1947                                 // We could choose to do something else when Byte3 says Timeout on Chase from Edgeport,
1948                                 // like wait longer in block_until_chase_response, but for now we don't.
1949                                 edge_port->chaseResponsePending = false;
1950                                 wake_up (&edge_port->wait_chase);
1951                                 return;
1952
1953                         case IOSP_EXT_STATUS_RX_CHECK_RSP:
1954                                 dbg("%s ========== Port %u CHECK_RSP Sequence = %02x =============\n", __FUNCTION__, edge_serial->rxPort, byte3 );
1955                                 //Port->RxCheckRsp = true;
1956                                 return;
1957                 }
1958         }
1959
1960         if (code == IOSP_STATUS_OPEN_RSP) {
1961                 edge_port->txCredits = GET_TX_BUFFER_SIZE(byte3);
1962                 edge_port->maxTxCredits = edge_port->txCredits;
1963                 dbg("%s - Port %u Open Response Inital MSR = %02x TxBufferSize = %d", __FUNCTION__, edge_serial->rxPort, byte2, edge_port->txCredits);
1964                 handle_new_msr (edge_port, byte2);
1965
1966                 /* send the current line settings to the port so we are in sync with any further termios calls */
1967                 if (edge_port->port->tty)
1968                         change_port_settings (edge_port, edge_port->port->tty->termios);
1969
1970                 /* we have completed the open */
1971                 edge_port->openPending = false;
1972                 edge_port->open = true;
1973                 wake_up(&edge_port->wait_open);
1974                 return;
1975         }
1976
1977         // If port is closed, silently discard all rcvd status. We can
1978         // have cases where buffered status is received AFTER the close
1979         // port command is sent to the Edgeport.
1980         if (!edge_port->open || edge_port->closePending) {
1981                 return;
1982         }
1983
1984         switch (code) {
1985                 // Not currently sent by Edgeport
1986                 case IOSP_STATUS_LSR:
1987                         dbg("%s - Port %u LSR Status = %02x", __FUNCTION__, edge_serial->rxPort, byte2);
1988                         handle_new_lsr(edge_port, false, byte2, 0);
1989                         break;
1990
1991                 case IOSP_STATUS_LSR_DATA:
1992                         dbg("%s - Port %u LSR Status = %02x, Data = %02x", __FUNCTION__, edge_serial->rxPort, byte2, byte3);
1993                         // byte2 is LSR Register
1994                         // byte3 is broken data byte
1995                         handle_new_lsr(edge_port, true, byte2, byte3);
1996                         break;
1997                         //
1998                         //      case IOSP_EXT_4_STATUS:
1999                         //              dbg("%s - Port %u LSR Status = %02x Data = %02x", __FUNCTION__, edge_serial->rxPort, byte2, byte3);
2000                         //              break;
2001                         //
2002                 case IOSP_STATUS_MSR:
2003                         dbg("%s - Port %u MSR Status = %02x", __FUNCTION__, edge_serial->rxPort, byte2);
2004
2005                         // Process this new modem status and generate appropriate
2006                         // events, etc, based on the new status. This routine
2007                         // also saves the MSR in Port->ShadowMsr.
2008                         handle_new_msr(edge_port, byte2);
2009                         break;
2010
2011                 default:
2012                         dbg("%s - Unrecognized IOSP status code %u\n", __FUNCTION__, code);
2013                         break;
2014         }
2015
2016         return;
2017 }
2018
2019
2020 /*****************************************************************************
2021  * edge_tty_recv
2022  *      this function passes data on to the tty flip buffer
2023  *****************************************************************************/
2024 static void edge_tty_recv(struct device *dev, struct tty_struct *tty, unsigned char *data, int length)
2025 {
2026         int cnt;
2027
2028         do {
2029                 cnt = tty_buffer_request_room(tty, length);
2030                 if (cnt < length) {
2031                         dev_err(dev, "%s - dropping data, %d bytes lost\n",
2032                                         __FUNCTION__, length - cnt);
2033                         if(cnt == 0)
2034                                 break;
2035                 }
2036                 tty_insert_flip_string(tty, data, cnt);
2037                 data += cnt;
2038                 length -= cnt;
2039         } while (length > 0);
2040
2041         tty_flip_buffer_push(tty);
2042 }
2043
2044
2045 /*****************************************************************************
2046  * handle_new_msr
2047  *      this function handles any change to the msr register for a port.
2048  *****************************************************************************/
2049 static void handle_new_msr(struct edgeport_port *edge_port, __u8 newMsr)
2050 {
2051         struct  async_icount *icount;
2052
2053         dbg("%s %02x", __FUNCTION__, newMsr);
2054
2055         if (newMsr & (EDGEPORT_MSR_DELTA_CTS | EDGEPORT_MSR_DELTA_DSR | EDGEPORT_MSR_DELTA_RI | EDGEPORT_MSR_DELTA_CD)) {
2056                 icount = &edge_port->icount;
2057
2058                 /* update input line counters */
2059                 if (newMsr & EDGEPORT_MSR_DELTA_CTS) {
2060                         icount->cts++;
2061                 }
2062                 if (newMsr & EDGEPORT_MSR_DELTA_DSR) {
2063                         icount->dsr++;
2064                 }
2065                 if (newMsr & EDGEPORT_MSR_DELTA_CD) {
2066                         icount->dcd++;
2067                 }
2068                 if (newMsr & EDGEPORT_MSR_DELTA_RI) {
2069                         icount->rng++;
2070                 }
2071                 wake_up_interruptible(&edge_port->delta_msr_wait);
2072         }
2073
2074         /* Save the new modem status */
2075         edge_port->shadowMSR = newMsr & 0xf0;
2076
2077         return;
2078 }
2079
2080
2081 /*****************************************************************************
2082  * handle_new_lsr
2083  *      this function handles any change to the lsr register for a port.
2084  *****************************************************************************/
2085 static void handle_new_lsr(struct edgeport_port *edge_port, __u8 lsrData, __u8 lsr, __u8 data)
2086 {
2087         __u8    newLsr = (__u8)(lsr & (__u8)(LSR_OVER_ERR | LSR_PAR_ERR | LSR_FRM_ERR | LSR_BREAK));
2088         struct  async_icount *icount;
2089
2090         dbg("%s - %02x", __FUNCTION__, newLsr);
2091
2092         edge_port->shadowLSR = lsr;
2093
2094         if (newLsr & LSR_BREAK) {
2095                 //
2096                 // Parity and Framing errors only count if they
2097                 // occur exclusive of a break being
2098                 // received.
2099                 //
2100                 newLsr &= (__u8)(LSR_OVER_ERR | LSR_BREAK);
2101         }
2102
2103         /* Place LSR data byte into Rx buffer */
2104         if (lsrData && edge_port->port->tty)
2105                 edge_tty_recv(&edge_port->port->dev, edge_port->port->tty, &data, 1);
2106
2107         /* update input line counters */
2108         icount = &edge_port->icount;
2109         if (newLsr & LSR_BREAK) {
2110                 icount->brk++;
2111         }
2112         if (newLsr & LSR_OVER_ERR) {
2113                 icount->overrun++;
2114         }
2115         if (newLsr & LSR_PAR_ERR) {
2116                 icount->parity++;
2117         }
2118         if (newLsr & LSR_FRM_ERR) {
2119                 icount->frame++;
2120         }
2121
2122         return;
2123 }
2124
2125
2126 /****************************************************************************
2127  * sram_write
2128  *      writes a number of bytes to the Edgeport device's sram starting at the
2129  *      given address.
2130  *      If successful returns the number of bytes written, otherwise it returns
2131  *      a negative error number of the problem.
2132  ****************************************************************************/
2133 static int sram_write (struct usb_serial *serial, __u16 extAddr, __u16 addr, __u16 length, __u8 *data)
2134 {
2135         int result;
2136         __u16 current_length;
2137         unsigned char *transfer_buffer;
2138
2139         dbg("%s - %x, %x, %d", __FUNCTION__, extAddr, addr, length);
2140
2141         transfer_buffer =  kmalloc (64, GFP_KERNEL);
2142         if (!transfer_buffer) {
2143                 dev_err(&serial->dev->dev, "%s - kmalloc(%d) failed.\n", __FUNCTION__, 64);
2144                 return -ENOMEM;
2145         }
2146
2147         /* need to split these writes up into 64 byte chunks */
2148         result = 0;
2149         while (length > 0) {
2150                 if (length > 64) {
2151                         current_length = 64;
2152                 } else {
2153                         current_length = length;
2154                 }
2155 //              dbg("%s - writing %x, %x, %d", __FUNCTION__, extAddr, addr, current_length);
2156                 memcpy (transfer_buffer, data, current_length);
2157                 result = usb_control_msg (serial->dev, usb_sndctrlpipe(serial->dev, 0), USB_REQUEST_ION_WRITE_RAM,
2158                                           0x40, addr, extAddr, transfer_buffer, current_length, 300);
2159                 if (result < 0)
2160                         break;
2161                 length -= current_length;
2162                 addr += current_length;
2163                 data += current_length;
2164         }
2165
2166         kfree (transfer_buffer);
2167         return result;
2168 }
2169
2170
2171 /****************************************************************************
2172  * rom_write
2173  *      writes a number of bytes to the Edgeport device's ROM starting at the
2174  *      given address.
2175  *      If successful returns the number of bytes written, otherwise it returns
2176  *      a negative error number of the problem.
2177  ****************************************************************************/
2178 static int rom_write (struct usb_serial *serial, __u16 extAddr, __u16 addr, __u16 length, __u8 *data)
2179 {
2180         int result;
2181         __u16 current_length;
2182         unsigned char *transfer_buffer;
2183
2184 //      dbg("%s - %x, %x, %d", __FUNCTION__, extAddr, addr, length);
2185
2186         transfer_buffer =  kmalloc (64, GFP_KERNEL);
2187         if (!transfer_buffer) {
2188                 dev_err(&serial->dev->dev, "%s - kmalloc(%d) failed.\n", __FUNCTION__, 64);
2189                 return -ENOMEM;
2190         }
2191
2192         /* need to split these writes up into 64 byte chunks */
2193         result = 0;
2194         while (length > 0) {
2195                 if (length > 64) {
2196                         current_length = 64;
2197                 } else {
2198                         current_length = length;
2199                 }
2200 //              dbg("%s - writing %x, %x, %d", __FUNCTION__, extAddr, addr, current_length);
2201                 memcpy (transfer_buffer, data, current_length);
2202                 result = usb_control_msg (serial->dev, usb_sndctrlpipe(serial->dev, 0), USB_REQUEST_ION_WRITE_ROM,
2203                                           0x40, addr, extAddr, transfer_buffer, current_length, 300);
2204                 if (result < 0)
2205                         break;
2206                 length -= current_length;
2207                 addr += current_length;
2208                 data += current_length;
2209         }
2210
2211         kfree (transfer_buffer);
2212         return result;
2213 }
2214
2215
2216 /****************************************************************************
2217  * rom_read
2218  *      reads a number of bytes from the Edgeport device starting at the given
2219  *      address.
2220  *      If successful returns the number of bytes read, otherwise it returns
2221  *      a negative error number of the problem.
2222  ****************************************************************************/
2223 static int rom_read (struct usb_serial *serial, __u16 extAddr, __u16 addr, __u16 length, __u8 *data)
2224 {
2225         int result;
2226         __u16 current_length;
2227         unsigned char *transfer_buffer;
2228
2229         dbg("%s - %x, %x, %d", __FUNCTION__, extAddr, addr, length);
2230
2231         transfer_buffer =  kmalloc (64, GFP_KERNEL);
2232         if (!transfer_buffer) {
2233                 dev_err(&serial->dev->dev, "%s - kmalloc(%d) failed.\n", __FUNCTION__, 64);
2234                 return -ENOMEM;
2235         }
2236
2237         /* need to split these reads up into 64 byte chunks */
2238         result = 0;
2239         while (length > 0) {
2240                 if (length > 64) {
2241                         current_length = 64;
2242                 } else {
2243                         current_length = length;
2244                 }
2245 //              dbg("%s - %x, %x, %d", __FUNCTION__, extAddr, addr, current_length);
2246                 result = usb_control_msg (serial->dev, usb_rcvctrlpipe(serial->dev, 0), USB_REQUEST_ION_READ_ROM,
2247                                           0xC0, addr, extAddr, transfer_buffer, current_length, 300);
2248                 if (result < 0)
2249                         break;
2250                 memcpy (data, transfer_buffer, current_length);
2251                 length -= current_length;
2252                 addr += current_length;
2253                 data += current_length;
2254         }
2255
2256         kfree (transfer_buffer);
2257         return result;
2258 }
2259
2260
2261 /****************************************************************************
2262  * send_iosp_ext_cmd
2263  *      Is used to send a IOSP message to the Edgeport device
2264  ****************************************************************************/
2265 static int send_iosp_ext_cmd (struct edgeport_port *edge_port, __u8 command, __u8 param)
2266 {
2267         unsigned char   *buffer;
2268         unsigned char   *currentCommand;
2269         int             length = 0;
2270         int             status = 0;
2271
2272         dbg("%s - %d, %d", __FUNCTION__, command, param);
2273
2274         buffer =  kmalloc (10, GFP_ATOMIC);
2275         if (!buffer) {
2276                 dev_err(&edge_port->port->dev, "%s - kmalloc(%d) failed.\n", __FUNCTION__, 10);
2277                 return -ENOMEM;
2278         }
2279
2280         currentCommand = buffer;
2281
2282         MAKE_CMD_EXT_CMD (&currentCommand, &length,
2283                           edge_port->port->number - edge_port->port->serial->minor,
2284                           command, param);
2285
2286         status = write_cmd_usb (edge_port, buffer, length);
2287         if (status) {
2288                 /* something bad happened, let's free up the memory */
2289                 kfree(buffer);
2290         }
2291
2292         return status;
2293 }
2294
2295
2296 /*****************************************************************************
2297  * write_cmd_usb
2298  *      this function writes the given buffer out to the bulk write endpoint.
2299  *****************************************************************************/
2300 static int write_cmd_usb (struct edgeport_port *edge_port, unsigned char *buffer, int length)
2301 {
2302         struct edgeport_serial *edge_serial = usb_get_serial_data(edge_port->port->serial);
2303         int status = 0;
2304         struct urb *urb;
2305         int timeout;
2306
2307         usb_serial_debug_data(debug, &edge_port->port->dev, __FUNCTION__, length, buffer);
2308
2309         /* Allocate our next urb */
2310         urb = usb_alloc_urb (0, GFP_ATOMIC);
2311         if (!urb)
2312                 return -ENOMEM;
2313
2314         atomic_inc(&CmdUrbs);
2315         dbg("%s - ALLOCATE URB %p (outstanding %d)", __FUNCTION__, urb, atomic_read(&CmdUrbs));
2316
2317         usb_fill_bulk_urb (urb, edge_serial->serial->dev,
2318                        usb_sndbulkpipe(edge_serial->serial->dev, edge_serial->bulk_out_endpoint),
2319                        buffer, length, edge_bulk_out_cmd_callback, edge_port);
2320
2321         edge_port->commandPending = true;
2322         status = usb_submit_urb(urb, GFP_ATOMIC);
2323
2324         if (status) {
2325                 /* something went wrong */
2326                 dev_err(&edge_port->port->dev, "%s - usb_submit_urb(write command) failed, status = %d\n", __FUNCTION__, status);
2327                 usb_kill_urb(urb);
2328                 usb_free_urb(urb);
2329                 atomic_dec(&CmdUrbs);
2330                 return status;
2331         }
2332
2333         // wait for command to finish
2334         timeout = COMMAND_TIMEOUT;
2335 #if 0
2336         wait_event (&edge_port->wait_command, !edge_port->commandPending);
2337
2338         if (edge_port->commandPending) {
2339                 /* command timed out */
2340                 dbg("%s - command timed out", __FUNCTION__);
2341                 status = -EINVAL;
2342         }
2343 #endif
2344         return status;
2345 }
2346
2347
2348 /*****************************************************************************
2349  * send_cmd_write_baud_rate
2350  *      this function sends the proper command to change the baud rate of the
2351  *      specified port.
2352  *****************************************************************************/
2353 static int send_cmd_write_baud_rate (struct edgeport_port *edge_port, int baudRate)
2354 {
2355         struct edgeport_serial *edge_serial = usb_get_serial_data(edge_port->port->serial);
2356         unsigned char *cmdBuffer;
2357         unsigned char *currCmd;
2358         int cmdLen = 0;
2359         int divisor;
2360         int status;
2361         unsigned char number = edge_port->port->number - edge_port->port->serial->minor;
2362
2363         if (edge_serial->is_epic &&
2364             !edge_serial->epic_descriptor.Supports.IOSPSetBaudRate) {
2365                 dbg("SendCmdWriteBaudRate - NOT Setting baud rate for port = %d, baud = %d",
2366                     edge_port->port->number, baudRate);
2367                 return 0;
2368         }
2369
2370         dbg("%s - port = %d, baud = %d", __FUNCTION__, edge_port->port->number, baudRate);
2371
2372         status = calc_baud_rate_divisor (baudRate, &divisor);
2373         if (status) {
2374                 dev_err(&edge_port->port->dev, "%s - bad baud rate\n", __FUNCTION__);
2375                 return status;
2376         }
2377
2378         // Alloc memory for the string of commands.
2379         cmdBuffer =  kmalloc (0x100, GFP_ATOMIC);
2380         if (!cmdBuffer) {
2381                 dev_err(&edge_port->port->dev, "%s - kmalloc(%d) failed.\n", __FUNCTION__, 0x100);
2382                 return -ENOMEM;
2383         }
2384         currCmd = cmdBuffer;
2385
2386         // Enable access to divisor latch
2387         MAKE_CMD_WRITE_REG( &currCmd, &cmdLen, number, LCR, LCR_DL_ENABLE );
2388
2389         // Write the divisor itself
2390         MAKE_CMD_WRITE_REG( &currCmd, &cmdLen, number, DLL, LOW8 (divisor) );
2391         MAKE_CMD_WRITE_REG( &currCmd, &cmdLen, number, DLM, HIGH8(divisor) );
2392
2393         // Restore original value to disable access to divisor latch
2394         MAKE_CMD_WRITE_REG( &currCmd, &cmdLen, number, LCR, edge_port->shadowLCR);
2395
2396         status = write_cmd_usb(edge_port, cmdBuffer, cmdLen );
2397         if (status) {
2398                 /* something bad happened, let's free up the memory */
2399                 kfree (cmdBuffer);
2400         }
2401
2402         return status;
2403 }
2404
2405
2406 /*****************************************************************************
2407  * calc_baud_rate_divisor
2408  *      this function calculates the proper baud rate divisor for the specified
2409  *      baud rate.
2410  *****************************************************************************/
2411 static int calc_baud_rate_divisor (int baudrate, int *divisor)
2412 {
2413         int i;
2414         __u16 custom;
2415
2416
2417         dbg("%s - %d", __FUNCTION__, baudrate);
2418
2419         for (i = 0; i < ARRAY_SIZE(divisor_table); i++) {
2420                 if ( divisor_table[i].BaudRate == baudrate ) {
2421                         *divisor = divisor_table[i].Divisor;
2422                         return 0;
2423                 }
2424         }
2425
2426         // We have tried all of the standard baud rates
2427         // lets try to calculate the divisor for this baud rate
2428         // Make sure the baud rate is reasonable
2429         if (baudrate > 50 && baudrate < 230400) {
2430                 // get divisor
2431                 custom = (__u16)((230400L + baudrate/2) / baudrate);
2432
2433                 *divisor = custom;
2434
2435                 dbg("%s - Baud %d = %d\n", __FUNCTION__, baudrate, custom);
2436                 return 0;
2437         }
2438
2439         return -1;
2440 }
2441
2442
2443 /*****************************************************************************
2444  * send_cmd_write_uart_register
2445  *      this function builds up a uart register message and sends to to the device.
2446  *****************************************************************************/
2447 static int send_cmd_write_uart_register (struct edgeport_port *edge_port, __u8 regNum, __u8 regValue)
2448 {
2449         struct edgeport_serial *edge_serial = usb_get_serial_data(edge_port->port->serial);
2450         unsigned char *cmdBuffer;
2451         unsigned char *currCmd;
2452         unsigned long cmdLen = 0;
2453         int status;
2454
2455         dbg("%s - write to %s register 0x%02x", (regNum == MCR) ? "MCR" : "LCR", __FUNCTION__, regValue);
2456
2457         if (edge_serial->is_epic &&
2458             !edge_serial->epic_descriptor.Supports.IOSPWriteMCR &&
2459             regNum == MCR) {
2460                 dbg("SendCmdWriteUartReg - Not writing to MCR Register");
2461                 return 0;
2462         }
2463
2464         if (edge_serial->is_epic &&
2465             !edge_serial->epic_descriptor.Supports.IOSPWriteLCR &&
2466             regNum == LCR) {
2467                 dbg ("SendCmdWriteUartReg - Not writing to LCR Register");
2468                 return 0;
2469         }
2470
2471         // Alloc memory for the string of commands.
2472         cmdBuffer = kmalloc (0x10, GFP_ATOMIC);
2473         if (cmdBuffer == NULL ) {
2474                 return -ENOMEM;
2475         }
2476
2477         currCmd = cmdBuffer;
2478
2479         // Build a cmd in the buffer to write the given register
2480         MAKE_CMD_WRITE_REG (&currCmd, &cmdLen,
2481                             edge_port->port->number - edge_port->port->serial->minor,
2482                             regNum, regValue);
2483
2484         status = write_cmd_usb(edge_port, cmdBuffer, cmdLen);
2485         if (status) {
2486                 /* something bad happened, let's free up the memory */
2487                 kfree (cmdBuffer);
2488         }
2489
2490         return status;
2491 }
2492
2493
2494 /*****************************************************************************
2495  * change_port_settings
2496  *      This routine is called to set the UART on the device to match the specified
2497  *      new settings.
2498  *****************************************************************************/
2499 #ifndef CMSPAR
2500 #define CMSPAR 0
2501 #endif
2502 static void change_port_settings (struct edgeport_port *edge_port, struct ktermios *old_termios)
2503 {
2504         struct edgeport_serial *edge_serial = usb_get_serial_data(edge_port->port->serial);
2505         struct tty_struct *tty;
2506         int baud;
2507         unsigned cflag;
2508         __u8 mask = 0xff;
2509         __u8 lData;
2510         __u8 lParity;
2511         __u8 lStop;
2512         __u8 rxFlow;
2513         __u8 txFlow;
2514         int status;
2515
2516         dbg("%s - port %d", __FUNCTION__, edge_port->port->number);
2517
2518         if (!edge_port->open &&
2519             !edge_port->openPending) {
2520                 dbg("%s - port not opened", __FUNCTION__);
2521                 return;
2522         }
2523
2524         tty = edge_port->port->tty;
2525         if ((!tty) ||
2526             (!tty->termios)) {
2527                 dbg("%s - no tty structures", __FUNCTION__);
2528                 return;
2529         }
2530
2531         cflag = tty->termios->c_cflag;
2532
2533         switch (cflag & CSIZE) {
2534                 case CS5:   lData = LCR_BITS_5; mask = 0x1f;    dbg("%s - data bits = 5", __FUNCTION__);   break;
2535                 case CS6:   lData = LCR_BITS_6; mask = 0x3f;    dbg("%s - data bits = 6", __FUNCTION__);   break;
2536                 case CS7:   lData = LCR_BITS_7; mask = 0x7f;    dbg("%s - data bits = 7", __FUNCTION__);   break;
2537                 default:
2538                 case CS8:   lData = LCR_BITS_8;                 dbg("%s - data bits = 8", __FUNCTION__);   break;
2539         }
2540
2541         lParity = LCR_PAR_NONE;
2542         if (cflag & PARENB) {
2543                 if (cflag & CMSPAR) {
2544                         if (cflag & PARODD) {
2545                                 lParity = LCR_PAR_MARK;
2546                                 dbg("%s - parity = mark", __FUNCTION__);
2547                         } else {
2548                                 lParity = LCR_PAR_SPACE;
2549                                 dbg("%s - parity = space", __FUNCTION__);
2550                         }
2551                 } else if (cflag & PARODD) {
2552                         lParity = LCR_PAR_ODD;
2553                         dbg("%s - parity = odd", __FUNCTION__);
2554                 } else {
2555                         lParity = LCR_PAR_EVEN;
2556                         dbg("%s - parity = even", __FUNCTION__);
2557                 }
2558         } else {
2559                 dbg("%s - parity = none", __FUNCTION__);
2560         }
2561
2562         if (cflag & CSTOPB) {
2563                 lStop = LCR_STOP_2;
2564                 dbg("%s - stop bits = 2", __FUNCTION__);
2565         } else {
2566                 lStop = LCR_STOP_1;
2567                 dbg("%s - stop bits = 1", __FUNCTION__);
2568         }
2569
2570         /* figure out the flow control settings */
2571         rxFlow = txFlow = 0x00;
2572         if (cflag & CRTSCTS) {
2573                 rxFlow |= IOSP_RX_FLOW_RTS;
2574                 txFlow |= IOSP_TX_FLOW_CTS;
2575                 dbg("%s - RTS/CTS is enabled", __FUNCTION__);
2576         } else {
2577                 dbg("%s - RTS/CTS is disabled", __FUNCTION__);
2578         }
2579
2580         /* if we are implementing XON/XOFF, set the start and stop character in the device */
2581         if (I_IXOFF(tty) || I_IXON(tty)) {
2582                 unsigned char stop_char  = STOP_CHAR(tty);
2583                 unsigned char start_char = START_CHAR(tty);
2584
2585                 if ((!edge_serial->is_epic) ||
2586                     ((edge_serial->is_epic) &&
2587                      (edge_serial->epic_descriptor.Supports.IOSPSetXChar))) {
2588                         send_iosp_ext_cmd(edge_port, IOSP_CMD_SET_XON_CHAR, start_char);
2589                         send_iosp_ext_cmd(edge_port, IOSP_CMD_SET_XOFF_CHAR, stop_char);
2590                 }
2591
2592                 /* if we are implementing INBOUND XON/XOFF */
2593                 if (I_IXOFF(tty)) {
2594                         rxFlow |= IOSP_RX_FLOW_XON_XOFF;
2595                         dbg("%s - INBOUND XON/XOFF is enabled, XON = %2x, XOFF = %2x", __FUNCTION__, start_char, stop_char);
2596                 } else {
2597                         dbg("%s - INBOUND XON/XOFF is disabled", __FUNCTION__);
2598                 }
2599
2600                 /* if we are implementing OUTBOUND XON/XOFF */
2601                 if (I_IXON(tty)) {
2602                         txFlow |= IOSP_TX_FLOW_XON_XOFF;
2603                         dbg("%s - OUTBOUND XON/XOFF is enabled, XON = %2x, XOFF = %2x", __FUNCTION__, start_char, stop_char);
2604                 } else {
2605                         dbg("%s - OUTBOUND XON/XOFF is disabled", __FUNCTION__);
2606                 }
2607         }
2608
2609         /* Set flow control to the configured value */
2610         if ((!edge_serial->is_epic) ||
2611             ((edge_serial->is_epic) &&
2612              (edge_serial->epic_descriptor.Supports.IOSPSetRxFlow)))
2613                 send_iosp_ext_cmd(edge_port, IOSP_CMD_SET_RX_FLOW, rxFlow);
2614         if ((!edge_serial->is_epic) ||
2615             ((edge_serial->is_epic) &&
2616              (edge_serial->epic_descriptor.Supports.IOSPSetTxFlow)))
2617                 send_iosp_ext_cmd(edge_port, IOSP_CMD_SET_TX_FLOW, txFlow);
2618
2619
2620         edge_port->shadowLCR &= ~(LCR_BITS_MASK | LCR_STOP_MASK | LCR_PAR_MASK);
2621         edge_port->shadowLCR |= (lData | lParity | lStop);
2622
2623         edge_port->validDataMask = mask;
2624
2625         /* Send the updated LCR value to the EdgePort */
2626         status = send_cmd_write_uart_register(edge_port, LCR, edge_port->shadowLCR);
2627         if (status != 0) {
2628                 return;
2629         }
2630
2631         /* set up the MCR register and send it to the EdgePort */
2632         edge_port->shadowMCR = MCR_MASTER_IE;
2633         if (cflag & CBAUD) {
2634                 edge_port->shadowMCR |= (MCR_DTR | MCR_RTS);
2635         }
2636         status = send_cmd_write_uart_register(edge_port, MCR, edge_port->shadowMCR);
2637         if (status != 0) {
2638                 return;
2639         }
2640
2641         /* Determine divisor based on baud rate */
2642         baud = tty_get_baud_rate(tty);
2643         if (!baud) {
2644                 /* pick a default, any default... */
2645                 baud = 9600;
2646         }
2647
2648         dbg("%s - baud rate = %d", __FUNCTION__, baud);
2649         status = send_cmd_write_baud_rate (edge_port, baud);
2650         if (status == -1) {
2651                 /* Speed change was not possible - put back the old speed */
2652                 baud = tty_termios_baud_rate(old_termios);
2653                 tty_encode_baud_rate(tty, baud, baud);
2654         }
2655         return;
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, __le16 *unicode, int unicode_size)
2667 {
2668         int i;
2669
2670         if (buflen <= 0)        /* never happens, but... */
2671                 return;
2672         --buflen;               /* space for nul */
2673
2674         for (i = 0; i < unicode_size; i++) {
2675                 if (i >= buflen)
2676                         break;
2677                 string[i] = (char)(le16_to_cpu(unicode[i]));
2678         }
2679         string[i] = 0x00;
2680 }
2681
2682
2683 /****************************************************************************
2684  * get_manufacturing_desc
2685  *      reads in the manufacturing descriptor and stores it into the serial
2686  *      structure.
2687  ****************************************************************************/
2688 static void get_manufacturing_desc (struct edgeport_serial *edge_serial)
2689 {
2690         int response;
2691
2692         dbg("getting manufacturer descriptor");
2693
2694         response = rom_read (edge_serial->serial, (EDGE_MANUF_DESC_ADDR & 0xffff0000) >> 16,
2695                             (__u16)(EDGE_MANUF_DESC_ADDR & 0x0000ffff), EDGE_MANUF_DESC_LEN,
2696                             (__u8 *)(&edge_serial->manuf_descriptor));
2697
2698         if (response < 1) {
2699                 dev_err(&edge_serial->serial->dev->dev, "error in getting manufacturer descriptor\n");
2700         } else {
2701                 char string[30];
2702                 dbg("**Manufacturer Descriptor");
2703                 dbg("  RomSize:        %dK", edge_serial->manuf_descriptor.RomSize);
2704                 dbg("  RamSize:        %dK", edge_serial->manuf_descriptor.RamSize);
2705                 dbg("  CpuRev:         %d", edge_serial->manuf_descriptor.CpuRev);
2706                 dbg("  BoardRev:       %d", edge_serial->manuf_descriptor.BoardRev);
2707                 dbg("  NumPorts:       %d", edge_serial->manuf_descriptor.NumPorts);
2708                 dbg("  DescDate:       %d/%d/%d", edge_serial->manuf_descriptor.DescDate[0], edge_serial->manuf_descriptor.DescDate[1], edge_serial->manuf_descriptor.DescDate[2]+1900);
2709                 unicode_to_ascii(string, sizeof(string),
2710                     edge_serial->manuf_descriptor.SerialNumber,
2711                     edge_serial->manuf_descriptor.SerNumLength/2);
2712                 dbg("  SerialNumber: %s", string);
2713                 unicode_to_ascii(string, sizeof(string),
2714                     edge_serial->manuf_descriptor.AssemblyNumber,
2715                     edge_serial->manuf_descriptor.AssemblyNumLength/2);
2716                 dbg("  AssemblyNumber: %s", string);
2717                 unicode_to_ascii(string, sizeof(string),
2718                     edge_serial->manuf_descriptor.OemAssyNumber,
2719                     edge_serial->manuf_descriptor.OemAssyNumLength/2);
2720                 dbg("  OemAssyNumber:  %s", string);
2721                 dbg("  UartType:       %d", edge_serial->manuf_descriptor.UartType);
2722                 dbg("  IonPid:         %d", edge_serial->manuf_descriptor.IonPid);
2723                 dbg("  IonConfig:      %d", edge_serial->manuf_descriptor.IonConfig);
2724         }
2725 }
2726
2727
2728 /****************************************************************************
2729  * get_boot_desc
2730  *      reads in the bootloader descriptor and stores it into the serial
2731  *      structure.
2732  ****************************************************************************/
2733 static void get_boot_desc (struct edgeport_serial *edge_serial)
2734 {
2735         int response;
2736
2737         dbg("getting boot descriptor");
2738
2739         response = rom_read (edge_serial->serial, (EDGE_BOOT_DESC_ADDR & 0xffff0000) >> 16,
2740                             (__u16)(EDGE_BOOT_DESC_ADDR & 0x0000ffff), EDGE_BOOT_DESC_LEN,
2741                             (__u8 *)(&edge_serial->boot_descriptor));
2742
2743         if (response < 1) {
2744                 dev_err(&edge_serial->serial->dev->dev, "error in getting boot descriptor\n");
2745         } else {
2746                 dbg("**Boot Descriptor:");
2747                 dbg("  BootCodeLength: %d", le16_to_cpu(edge_serial->boot_descriptor.BootCodeLength));
2748                 dbg("  MajorVersion:   %d", edge_serial->boot_descriptor.MajorVersion);
2749                 dbg("  MinorVersion:   %d", edge_serial->boot_descriptor.MinorVersion);
2750                 dbg("  BuildNumber:    %d", le16_to_cpu(edge_serial->boot_descriptor.BuildNumber));
2751                 dbg("  Capabilities:   0x%x", le16_to_cpu(edge_serial->boot_descriptor.Capabilities));
2752                 dbg("  UConfig0:       %d", edge_serial->boot_descriptor.UConfig0);
2753                 dbg("  UConfig1:       %d", edge_serial->boot_descriptor.UConfig1);
2754         }
2755 }
2756
2757
2758 /****************************************************************************
2759  * load_application_firmware
2760  *      This is called to load the application firmware to the device
2761  ****************************************************************************/
2762 static void load_application_firmware (struct edgeport_serial *edge_serial)
2763 {
2764         struct edge_firmware_image_record *record;
2765         unsigned char *firmware;
2766         unsigned char *FirmwareImage;
2767         int ImageSize;
2768         int response;
2769
2770
2771         switch (edge_serial->product_info.iDownloadFile) {
2772                 case EDGE_DOWNLOAD_FILE_I930:
2773                         dbg("downloading firmware version (930) %d.%d.%d",
2774                             OperationalCodeImageVersion_GEN1.MajorVersion,
2775                             OperationalCodeImageVersion_GEN1.MinorVersion,
2776                             OperationalCodeImageVersion_GEN1.BuildNumber);
2777                         firmware = &OperationalCodeImage_GEN1[0];
2778                         FirmwareImage = &OperationalCodeImage_GEN1[0];
2779                         ImageSize = sizeof(OperationalCodeImage_GEN1);
2780                         break;
2781
2782                 case EDGE_DOWNLOAD_FILE_80251:
2783                         dbg("downloading firmware version (80251) %d.%d.%d",
2784                             OperationalCodeImageVersion_GEN2.MajorVersion,
2785                             OperationalCodeImageVersion_GEN2.MinorVersion,
2786                             OperationalCodeImageVersion_GEN2.BuildNumber);
2787                         firmware = &OperationalCodeImage_GEN2[0];
2788                         FirmwareImage = &OperationalCodeImage_GEN2[0];
2789                         ImageSize = sizeof(OperationalCodeImage_GEN2);
2790                         break;
2791
2792                 case EDGE_DOWNLOAD_FILE_NONE:
2793                         dbg     ("No download file specified, skipping download\n");
2794                         return;
2795
2796                 default:
2797                         return;
2798         }
2799
2800
2801         for (;;) {
2802                 record = (struct edge_firmware_image_record *)firmware;
2803                 response = sram_write (edge_serial->serial, le16_to_cpu(record->ExtAddr), le16_to_cpu(record->Addr), le16_to_cpu(record->Len), &record->Data[0]);
2804                 if (response < 0) {
2805                         dev_err(&edge_serial->serial->dev->dev, "sram_write failed (%x, %x, %d)\n", le16_to_cpu(record->ExtAddr), le16_to_cpu(record->Addr), le16_to_cpu(record->Len));
2806                         break;
2807                 }
2808                 firmware += sizeof (struct edge_firmware_image_record) + le16_to_cpu(record->Len);
2809                 if (firmware >= &FirmwareImage[ImageSize]) {
2810                         break;
2811                 }
2812         }
2813
2814         dbg("sending exec_dl_code");
2815         response = usb_control_msg (edge_serial->serial->dev,
2816                                     usb_sndctrlpipe(edge_serial->serial->dev, 0),
2817                                     USB_REQUEST_ION_EXEC_DL_CODE,
2818                                     0x40, 0x4000, 0x0001, NULL, 0, 3000);
2819
2820         return;
2821 }
2822
2823
2824 /****************************************************************************
2825  * edge_startup
2826  ****************************************************************************/
2827 static int edge_startup (struct usb_serial *serial)
2828 {
2829         struct edgeport_serial *edge_serial;
2830         struct edgeport_port *edge_port;
2831         struct usb_device *dev;
2832         int i, j;
2833         int response;
2834         bool interrupt_in_found;
2835         bool bulk_in_found;
2836         bool bulk_out_found;
2837         static __u32 descriptor[3] = {  EDGE_COMPATIBILITY_MASK0,
2838                                         EDGE_COMPATIBILITY_MASK1,
2839                                         EDGE_COMPATIBILITY_MASK2 };
2840
2841         dev = serial->dev;
2842
2843         /* create our private serial structure */
2844         edge_serial = kzalloc(sizeof(struct edgeport_serial), GFP_KERNEL);
2845         if (edge_serial == NULL) {
2846                 dev_err(&serial->dev->dev, "%s - Out of memory\n", __FUNCTION__);
2847                 return -ENOMEM;
2848         }
2849         spin_lock_init(&edge_serial->es_lock);
2850         edge_serial->serial = serial;
2851         usb_set_serial_data(serial, edge_serial);
2852
2853         /* get the name for the device from the device */
2854         i = get_string(dev, dev->descriptor.iManufacturer,
2855             &edge_serial->name[0], MAX_NAME_LEN+1);
2856         edge_serial->name[i++] = ' ';
2857         get_string(dev, dev->descriptor.iProduct,
2858             &edge_serial->name[i], MAX_NAME_LEN+2 - i);
2859
2860         dev_info(&serial->dev->dev, "%s detected\n", edge_serial->name);
2861
2862         /* Read the epic descriptor */
2863         if (get_epic_descriptor(edge_serial) <= 0) {
2864                 /* memcpy descriptor to Supports structures */
2865                 memcpy(&edge_serial->epic_descriptor.Supports, descriptor,
2866                        sizeof(struct edge_compatibility_bits));
2867
2868                 /* get the manufacturing descriptor for this device */
2869                 get_manufacturing_desc (edge_serial);
2870
2871                 /* get the boot descriptor */
2872                 get_boot_desc (edge_serial);
2873
2874                 get_product_info(edge_serial);
2875         }
2876
2877         /* set the number of ports from the manufacturing description */
2878         /* serial->num_ports = serial->product_info.NumPorts; */
2879         if ((!edge_serial->is_epic) &&
2880             (edge_serial->product_info.NumPorts != serial->num_ports)) {
2881                 dev_warn(&serial->dev->dev, "Device Reported %d serial ports "
2882                          "vs. core thinking we have %d ports, email "
2883                          "greg@kroah.com this information.\n",
2884                          edge_serial->product_info.NumPorts,
2885                          serial->num_ports);
2886         }
2887
2888         dbg("%s - time 1 %ld", __FUNCTION__, jiffies);
2889
2890         /* If not an EPiC device */
2891         if (!edge_serial->is_epic) {
2892                 /* now load the application firmware into this device */
2893                 load_application_firmware (edge_serial);
2894
2895                 dbg("%s - time 2 %ld", __FUNCTION__, jiffies);
2896
2897                 /* Check current Edgeport EEPROM and update if necessary */
2898                 update_edgeport_E2PROM (edge_serial);
2899
2900                 dbg("%s - time 3 %ld", __FUNCTION__, jiffies);
2901
2902                 /* set the configuration to use #1 */
2903 //              dbg("set_configuration 1");
2904 //              usb_set_configuration (dev, 1);
2905         }
2906
2907         /* we set up the pointers to the endpoints in the edge_open function,
2908          * as the structures aren't created yet. */
2909
2910         /* set up our port private structures */
2911         for (i = 0; i < serial->num_ports; ++i) {
2912                 edge_port = kmalloc (sizeof(struct edgeport_port), GFP_KERNEL);
2913                 if (edge_port == NULL) {
2914                         dev_err(&serial->dev->dev, "%s - Out of memory\n", __FUNCTION__);
2915                         for (j = 0; j < i; ++j) {
2916                                 kfree (usb_get_serial_port_data(serial->port[j]));
2917                                 usb_set_serial_port_data(serial->port[j],  NULL);
2918                         }
2919                         usb_set_serial_data(serial, NULL);
2920                         kfree(edge_serial);
2921                         return -ENOMEM;
2922                 }
2923                 memset (edge_port, 0, sizeof(struct edgeport_port));
2924                 spin_lock_init(&edge_port->ep_lock);
2925                 edge_port->port = serial->port[i];
2926                 usb_set_serial_port_data(serial->port[i], edge_port);
2927         }
2928
2929         response = 0;
2930
2931         if (edge_serial->is_epic) {
2932                 /* EPIC thing, set up our interrupt polling now and our read urb, so
2933                  * that the device knows it really is connected. */
2934                 interrupt_in_found = bulk_in_found = bulk_out_found = false;
2935                 for (i = 0; i < serial->interface->altsetting[0].desc.bNumEndpoints; ++i) {
2936                         struct usb_endpoint_descriptor *endpoint;
2937                         int buffer_size;
2938
2939                         endpoint = &serial->interface->altsetting[0].endpoint[i].desc;
2940                         buffer_size = le16_to_cpu(endpoint->wMaxPacketSize);
2941                         if (!interrupt_in_found &&
2942                             (usb_endpoint_is_int_in(endpoint))) {
2943                                 /* we found a interrupt in endpoint */
2944                                 dbg("found interrupt in");
2945
2946                                 /* not set up yet, so do it now */
2947                                 edge_serial->interrupt_read_urb = usb_alloc_urb(0, GFP_KERNEL);
2948                                 if (!edge_serial->interrupt_read_urb) {
2949                                         err("out of memory");
2950                                         return -ENOMEM;
2951                                 }
2952                                 edge_serial->interrupt_in_buffer = kmalloc(buffer_size, GFP_KERNEL);
2953                                 if (!edge_serial->interrupt_in_buffer) {
2954                                         err("out of memory");
2955                                         usb_free_urb(edge_serial->interrupt_read_urb);
2956                                         return -ENOMEM;
2957                                 }
2958                                 edge_serial->interrupt_in_endpoint = endpoint->bEndpointAddress;
2959
2960                                 /* set up our interrupt urb */
2961                                 usb_fill_int_urb(edge_serial->interrupt_read_urb,
2962                                                  dev,
2963                                                  usb_rcvintpipe(dev, endpoint->bEndpointAddress),
2964                                                  edge_serial->interrupt_in_buffer,
2965                                                  buffer_size,
2966                                                  edge_interrupt_callback,
2967                                                  edge_serial,
2968                                                  endpoint->bInterval);
2969
2970                                 interrupt_in_found = true;
2971                         }
2972
2973                         if (!bulk_in_found &&
2974                             (usb_endpoint_is_bulk_in(endpoint))) {
2975                                 /* we found a bulk in endpoint */
2976                                 dbg("found bulk in");
2977
2978                                 /* not set up yet, so do it now */
2979                                 edge_serial->read_urb = usb_alloc_urb(0, GFP_KERNEL);
2980                                 if (!edge_serial->read_urb) {
2981                                         err("out of memory");
2982                                         return -ENOMEM;
2983                                 }
2984                                 edge_serial->bulk_in_buffer = kmalloc(buffer_size, GFP_KERNEL);
2985                                 if (!edge_serial->bulk_in_buffer) {
2986                                         err ("out of memory");
2987                                         usb_free_urb(edge_serial->read_urb);
2988                                         return -ENOMEM;
2989                                 }
2990                                 edge_serial->bulk_in_endpoint = endpoint->bEndpointAddress;
2991
2992                                 /* set up our bulk in urb */
2993                                 usb_fill_bulk_urb(edge_serial->read_urb, dev,
2994                                                   usb_rcvbulkpipe(dev, endpoint->bEndpointAddress),
2995                                                   edge_serial->bulk_in_buffer,
2996                                                   endpoint->wMaxPacketSize,
2997                                                   edge_bulk_in_callback,
2998                                                   edge_serial);
2999                                 bulk_in_found = true;
3000                         }
3001
3002                         if (!bulk_out_found &&
3003                             (usb_endpoint_is_bulk_out(endpoint))) {
3004                                 /* we found a bulk out endpoint */
3005                                 dbg("found bulk out");
3006                                 edge_serial->bulk_out_endpoint = endpoint->bEndpointAddress;
3007                                 bulk_out_found = true;
3008                         }
3009                 }
3010
3011                 if (!interrupt_in_found || !bulk_in_found || !bulk_out_found) {
3012                         err ("Error - the proper endpoints were not found!");
3013                         return -ENODEV;
3014                 }
3015
3016                 /* start interrupt read for this edgeport this interrupt will
3017                  * continue as long as the edgeport is connected */
3018                 response = usb_submit_urb(edge_serial->interrupt_read_urb, GFP_KERNEL);
3019                 if (response)
3020                         err("%s - Error %d submitting control urb", __FUNCTION__, response);
3021         }
3022         return response;
3023 }
3024
3025
3026 /****************************************************************************
3027  * edge_shutdown
3028  *      This function is called whenever the device is removed from the usb bus.
3029  ****************************************************************************/
3030 static void edge_shutdown (struct usb_serial *serial)
3031 {
3032         struct edgeport_serial *edge_serial = usb_get_serial_data(serial);
3033         int i;
3034
3035         dbg("%s", __FUNCTION__);
3036
3037         /* stop reads and writes on all ports */
3038         for (i=0; i < serial->num_ports; ++i) {
3039                 kfree (usb_get_serial_port_data(serial->port[i]));
3040                 usb_set_serial_port_data(serial->port[i],  NULL);
3041         }
3042         /* free up our endpoint stuff */
3043         if (edge_serial->is_epic) {
3044                 usb_kill_urb(edge_serial->interrupt_read_urb);
3045                 usb_free_urb(edge_serial->interrupt_read_urb);
3046                 kfree(edge_serial->interrupt_in_buffer);
3047
3048                 usb_kill_urb(edge_serial->read_urb);
3049                 usb_free_urb(edge_serial->read_urb);
3050                 kfree(edge_serial->bulk_in_buffer);
3051         }
3052
3053         kfree(edge_serial);
3054         usb_set_serial_data(serial, NULL);
3055 }
3056
3057
3058 /****************************************************************************
3059  * edgeport_init
3060  *      This is called by the module subsystem, or on startup to initialize us
3061  ****************************************************************************/
3062 static int __init edgeport_init(void)
3063 {
3064         int retval;
3065
3066         retval = usb_serial_register(&edgeport_2port_device);
3067         if (retval)
3068                 goto failed_2port_device_register;
3069         retval = usb_serial_register(&edgeport_4port_device);
3070         if (retval)
3071                 goto failed_4port_device_register;
3072         retval = usb_serial_register(&edgeport_8port_device);
3073         if (retval)
3074                 goto failed_8port_device_register;
3075         retval = usb_serial_register(&epic_device);
3076         if (retval)
3077                 goto failed_epic_device_register;
3078         retval = usb_register(&io_driver);
3079         if (retval)
3080                 goto failed_usb_register;
3081         atomic_set(&CmdUrbs, 0);
3082         info(DRIVER_DESC " " DRIVER_VERSION);
3083         return 0;
3084
3085 failed_usb_register:
3086         usb_serial_deregister(&epic_device);
3087 failed_epic_device_register:
3088         usb_serial_deregister(&edgeport_8port_device);
3089 failed_8port_device_register:
3090         usb_serial_deregister(&edgeport_4port_device);
3091 failed_4port_device_register:
3092         usb_serial_deregister(&edgeport_2port_device);
3093 failed_2port_device_register:
3094         return retval;
3095 }
3096
3097
3098 /****************************************************************************
3099  * edgeport_exit
3100  *      Called when the driver is about to be unloaded.
3101  ****************************************************************************/
3102 static void __exit edgeport_exit (void)
3103 {
3104         usb_deregister (&io_driver);
3105         usb_serial_deregister (&edgeport_2port_device);
3106         usb_serial_deregister (&edgeport_4port_device);
3107         usb_serial_deregister (&edgeport_8port_device);
3108         usb_serial_deregister (&epic_device);
3109 }
3110
3111 module_init(edgeport_init);
3112 module_exit(edgeport_exit);
3113
3114 /* Module information */
3115 MODULE_AUTHOR( DRIVER_AUTHOR );
3116 MODULE_DESCRIPTION( DRIVER_DESC );
3117 MODULE_LICENSE("GPL");
3118
3119 module_param(debug, bool, S_IRUGO | S_IWUSR);
3120 MODULE_PARM_DESC(debug, "Debug enabled or not");
3121
3122 module_param(low_latency, bool, S_IRUGO | S_IWUSR);
3123 MODULE_PARM_DESC(low_latency, "Low latency enabled or not");