SAFE public projects git trees. - safe/jmp/linux-2.6/blob - drivers/usb/serial/io_edgeport.c

   1 /*
   2  * Edgeport USB Serial Converter driver
   3  *
   4  * Copyright (C) 2000 Inside Out Networks, All rights reserved.
   5  * Copyright (C) 2001-2002 Greg Kroah-Hartman <greg@kroah.com>
   6  *
   7  *      This program is free software; you can redistribute it and/or modify
   8  *      it under the terms of the GNU General Public License as published by
   9  *      the Free Software Foundation; either version 2 of the License, or
  10  *      (at your option) any later version.
  11  *
  12  * Supports the following devices:
  13  *      Edgeport/4
  14  *      Edgeport/4t
  15  *      Edgeport/2
  16  *      Edgeport/4i
  17  *      Edgeport/2i
  18  *      Edgeport/421
  19  *      Edgeport/21
  20  *      Rapidport/4
  21  *      Edgeport/8
  22  *      Edgeport/2D8
  23  *      Edgeport/4D8
  24  *      Edgeport/8i
  25  *
  26  * For questions or problems with this driver, contact Inside Out
  27  * Networks technical support, or Peter Berger <pberger@brimson.com>,
  28  * or Al Borchers <alborchers@steinerpoint.com>.
  29  *
  30  */
  31
  32 #include <linux/kernel.h>
  33 #include <linux/jiffies.h>
  34 #include <linux/errno.h>
  35 #include <linux/init.h>
  36 #include <linux/slab.h>
  37 #include <linux/tty.h>
  38 #include <linux/tty_driver.h>
  39 #include <linux/tty_flip.h>
  40 #include <linux/module.h>
  41 #include <linux/spinlock.h>
  42 #include <linux/serial.h>
  43 #include <linux/ioctl.h>
  44 #include <linux/wait.h>
  45 #include <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         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1507         struct tty_struct *tty = port->tty;
1508         unsigned int cflag;
1509
1510         if (!port->tty || !port->tty->termios) {
1511                 dbg ("%s - no tty or termios", __FUNCTION__);
1512                 return;
1513         }
1514
1515         cflag = tty->termios->c_cflag;
1516         /* check that they really want us to change something */
1517         if (old_termios) {
1518                 if (cflag == old_termios->c_cflag &&
1519                     tty->termios->c_iflag == old_termios->c_iflag) {
1520                         dbg("%s - nothing to change", __FUNCTION__);
1521                         return;
1522                 }
1523         }
1524
1525         dbg("%s - clfag %08x iflag %08x", __FUNCTION__,
1526             tty->termios->c_cflag, tty->termios->c_iflag);
1527         if (old_termios) {
1528                 dbg("%s - old clfag %08x old iflag %08x", __FUNCTION__,
1529                     old_termios->c_cflag, old_termios->c_iflag);
1530         }
1531
1532         dbg("%s - port %d", __FUNCTION__, port->number);
1533
1534         if (edge_port == NULL)
1535                 return;
1536
1537         if (!edge_port->open) {
1538                 dbg("%s - port not opened", __FUNCTION__);
1539                 return;
1540         }
1541
1542         /* change the port settings to the new ones specified */
1543         change_port_settings (edge_port, old_termios);
1544
1545         return;
1546 }
1547
1548
1549 /*****************************************************************************
1550  * get_lsr_info - get line status register info
1551  *
1552  * Purpose: Let user call ioctl() to get info when the UART physically
1553  *          is emptied.  On bus types like RS485, the transmitter must
1554  *          release the bus after transmitting. This must be done when
1555  *          the transmit shift register is empty, not be done when the
1556  *          transmit holding register is empty.  This functionality
1557  *          allows an RS485 driver to be written in user space.
1558  *****************************************************************************/
1559 static int get_lsr_info(struct edgeport_port *edge_port, unsigned int __user *value)
1560 {
1561         unsigned int result = 0;
1562         unsigned long flags;
1563
1564         spin_lock_irqsave(&edge_port->ep_lock, flags);
1565         if (edge_port->maxTxCredits == edge_port->txCredits &&
1566             edge_port->txfifo.count == 0) {
1567                 dbg("%s -- Empty", __FUNCTION__);
1568                 result = TIOCSER_TEMT;
1569         }
1570         spin_unlock_irqrestore(&edge_port->ep_lock, flags);
1571
1572         if (copy_to_user(value, &result, sizeof(int)))
1573                 return -EFAULT;
1574         return 0;
1575 }
1576
1577 static int get_number_bytes_avail(struct edgeport_port *edge_port, unsigned int __user *value)
1578 {
1579         unsigned int result = 0;
1580         struct tty_struct *tty = edge_port->port->tty;
1581
1582         if (!tty)
1583                 return -ENOIOCTLCMD;
1584
1585         result = tty->read_cnt;
1586
1587         dbg("%s(%d) = %d", __FUNCTION__,  edge_port->port->number, result);
1588         if (copy_to_user(value, &result, sizeof(int)))
1589                 return -EFAULT;
1590         //return 0;
1591         return -ENOIOCTLCMD;
1592 }
1593
1594 static int edge_tiocmset (struct usb_serial_port *port, struct file *file, unsigned int set, unsigned int clear)
1595 {
1596         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1597         unsigned int mcr;
1598
1599         dbg("%s - port %d", __FUNCTION__, port->number);
1600
1601         mcr = edge_port->shadowMCR;
1602         if (set & TIOCM_RTS)
1603                 mcr |= MCR_RTS;
1604         if (set & TIOCM_DTR)
1605                 mcr |= MCR_DTR;
1606         if (set & TIOCM_LOOP)
1607                 mcr |= MCR_LOOPBACK;
1608
1609         if (clear & TIOCM_RTS)
1610                 mcr &= ~MCR_RTS;
1611         if (clear & TIOCM_DTR)
1612                 mcr &= ~MCR_DTR;
1613         if (clear & TIOCM_LOOP)
1614                 mcr &= ~MCR_LOOPBACK;
1615
1616         edge_port->shadowMCR = mcr;
1617
1618         send_cmd_write_uart_register(edge_port, MCR, edge_port->shadowMCR);
1619
1620         return 0;
1621 }
1622
1623 static int edge_tiocmget(struct usb_serial_port *port, struct file *file)
1624 {
1625         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1626         unsigned int result = 0;
1627         unsigned int msr;
1628         unsigned int mcr;
1629
1630         dbg("%s - port %d", __FUNCTION__, port->number);
1631
1632         msr = edge_port->shadowMSR;
1633         mcr = edge_port->shadowMCR;
1634         result = ((mcr & MCR_DTR)       ? TIOCM_DTR: 0)   /* 0x002 */
1635                   | ((mcr & MCR_RTS)    ? TIOCM_RTS: 0)   /* 0x004 */
1636                   | ((msr & EDGEPORT_MSR_CTS)   ? TIOCM_CTS: 0)   /* 0x020 */
1637                   | ((msr & EDGEPORT_MSR_CD)    ? TIOCM_CAR: 0)   /* 0x040 */
1638                   | ((msr & EDGEPORT_MSR_RI)    ? TIOCM_RI:  0)   /* 0x080 */
1639                   | ((msr & EDGEPORT_MSR_DSR)   ? TIOCM_DSR: 0);  /* 0x100 */
1640
1641
1642         dbg("%s -- %x", __FUNCTION__, result);
1643
1644         return result;
1645 }
1646
1647 static int get_serial_info(struct edgeport_port *edge_port, struct serial_struct __user *retinfo)
1648 {
1649         struct serial_struct tmp;
1650
1651         if (!retinfo)
1652                 return -EFAULT;
1653
1654         memset(&tmp, 0, sizeof(tmp));
1655
1656         tmp.type                = PORT_16550A;
1657         tmp.line                = edge_port->port->serial->minor;
1658         tmp.port                = edge_port->port->number;
1659         tmp.irq                 = 0;
1660         tmp.flags               = ASYNC_SKIP_TEST | ASYNC_AUTO_IRQ;
1661         tmp.xmit_fifo_size      = edge_port->maxTxCredits;
1662         tmp.baud_base           = 9600;
1663         tmp.close_delay         = 5*HZ;
1664         tmp.closing_wait        = 30*HZ;
1665 //      tmp.custom_divisor      = state->custom_divisor;
1666 //      tmp.hub6                = state->hub6;
1667 //      tmp.io_type             = state->io_type;
1668
1669         if (copy_to_user(retinfo, &tmp, sizeof(*retinfo)))
1670                 return -EFAULT;
1671         return 0;
1672 }
1673
1674
1675
1676 /*****************************************************************************
1677  * SerialIoctl
1678  *      this function handles any ioctl calls to the driver
1679  *****************************************************************************/
1680 static int edge_ioctl (struct usb_serial_port *port, struct file *file, unsigned int cmd, unsigned long arg)
1681 {
1682         DEFINE_WAIT(wait);
1683         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1684         struct async_icount cnow;
1685         struct async_icount cprev;
1686         struct serial_icounter_struct icount;
1687
1688         dbg("%s - port %d, cmd = 0x%x", __FUNCTION__, port->number, cmd);
1689
1690         switch (cmd) {
1691                 // return number of bytes available
1692                 case TIOCINQ:
1693                         dbg("%s (%d) TIOCINQ", __FUNCTION__,  port->number);
1694                         return get_number_bytes_avail(edge_port, (unsigned int __user *) arg);
1695                         break;
1696
1697                 case TIOCSERGETLSR:
1698                         dbg("%s (%d) TIOCSERGETLSR", __FUNCTION__,  port->number);
1699                         return get_lsr_info(edge_port, (unsigned int __user *) arg);
1700                         return 0;
1701
1702                 case TIOCGSERIAL:
1703                         dbg("%s (%d) TIOCGSERIAL", __FUNCTION__,  port->number);
1704                         return get_serial_info(edge_port, (struct serial_struct __user *) arg);
1705
1706                 case TIOCSSERIAL:
1707                         dbg("%s (%d) TIOCSSERIAL", __FUNCTION__,  port->number);
1708                         break;
1709
1710                 case TIOCMIWAIT:
1711                         dbg("%s (%d) TIOCMIWAIT", __FUNCTION__,  port->number);
1712                         cprev = edge_port->icount;
1713                         while (1) {
1714                                 prepare_to_wait(&edge_port->delta_msr_wait, &wait, TASK_INTERRUPTIBLE);
1715                                 schedule();
1716                                 finish_wait(&edge_port->delta_msr_wait, &wait);
1717                                 /* see if a signal did it */
1718                                 if (signal_pending(current))
1719                                         return -ERESTARTSYS;
1720                                 cnow = edge_port->icount;
1721                                 if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr &&
1722                                     cnow.dcd == cprev.dcd && cnow.cts == cprev.cts)
1723                                         return -EIO; /* no change => error */
1724                                 if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
1725                                     ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
1726                                     ((arg & TIOCM_CD)  && (cnow.dcd != cprev.dcd)) ||
1727                                     ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts)) ) {
1728                                         return 0;
1729                                 }
1730                                 cprev = cnow;
1731                         }
1732                         /* NOTREACHED */
1733                         break;
1734
1735                 case TIOCGICOUNT:
1736                         cnow = edge_port->icount;
1737                         memset(&icount, 0, sizeof(icount));
1738                         icount.cts = cnow.cts;
1739                         icount.dsr = cnow.dsr;
1740                         icount.rng = cnow.rng;
1741                         icount.dcd = cnow.dcd;
1742                         icount.rx = cnow.rx;
1743                         icount.tx = cnow.tx;
1744                         icount.frame = cnow.frame;
1745                         icount.overrun = cnow.overrun;
1746                         icount.parity = cnow.parity;
1747                         icount.brk = cnow.brk;
1748                         icount.buf_overrun = cnow.buf_overrun;
1749
1750                         dbg("%s (%d) TIOCGICOUNT RX=%d, TX=%d", __FUNCTION__,  port->number, icount.rx, icount.tx );
1751                         if (copy_to_user((void __user *)arg, &icount, sizeof(icount)))
1752                                 return -EFAULT;
1753                         return 0;
1754         }
1755
1756         return -ENOIOCTLCMD;
1757 }
1758
1759
1760 /*****************************************************************************
1761  * SerialBreak
1762  *      this function sends a break to the port
1763  *****************************************************************************/
1764 static void edge_break (struct usb_serial_port *port, int break_state)
1765 {
1766         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1767         struct edgeport_serial *edge_serial = usb_get_serial_data(port->serial);
1768         int status;
1769
1770         if ((!edge_serial->is_epic) ||
1771             ((edge_serial->is_epic) &&
1772              (edge_serial->epic_descriptor.Supports.IOSPChase))) {
1773                 /* flush and chase */
1774                 edge_port->chaseResponsePending = true;
1775
1776                 dbg("%s - Sending IOSP_CMD_CHASE_PORT", __FUNCTION__);
1777                 status = send_iosp_ext_cmd (edge_port, IOSP_CMD_CHASE_PORT, 0);
1778                 if (status == 0) {
1779                         // block until chase finished
1780                         block_until_chase_response(edge_port);
1781                 } else {
1782                         edge_port->chaseResponsePending = false;
1783                 }
1784         }
1785
1786         if ((!edge_serial->is_epic) ||
1787             ((edge_serial->is_epic) &&
1788              (edge_serial->epic_descriptor.Supports.IOSPSetClrBreak))) {
1789                 if (break_state == -1) {
1790                         dbg("%s - Sending IOSP_CMD_SET_BREAK", __FUNCTION__);
1791                         status = send_iosp_ext_cmd (edge_port, IOSP_CMD_SET_BREAK, 0);
1792                 } else {
1793                         dbg("%s - Sending IOSP_CMD_CLEAR_BREAK", __FUNCTION__);
1794                         status = send_iosp_ext_cmd (edge_port, IOSP_CMD_CLEAR_BREAK, 0);
1795                 }
1796                 if (status) {
1797                         dbg("%s - error sending break set/clear command.", __FUNCTION__);
1798                 }
1799         }
1800
1801         return;
1802 }
1803
1804
1805 /*****************************************************************************
1806  * process_rcvd_data
1807  *      this function handles the data received on the bulk in pipe.
1808  *****************************************************************************/
1809 static void process_rcvd_data (struct edgeport_serial *edge_serial, unsigned char * buffer, __u16 bufferLength)
1810 {
1811         struct usb_serial_port *port;
1812         struct edgeport_port *edge_port;
1813         struct tty_struct *tty;
1814         __u16 lastBufferLength;
1815         __u16 rxLen;
1816
1817         dbg("%s", __FUNCTION__);
1818
1819         lastBufferLength = bufferLength + 1;
1820
1821         while (bufferLength > 0) {
1822                 /* failsafe incase we get a message that we don't understand */
1823                 if (lastBufferLength == bufferLength) {
1824                         dbg("%s - stuck in loop, exiting it.", __FUNCTION__);
1825                         break;
1826                 }
1827                 lastBufferLength = bufferLength;
1828
1829                 switch (edge_serial->rxState) {
1830                         case EXPECT_HDR1:
1831                                 edge_serial->rxHeader1 = *buffer;
1832                                 ++buffer;
1833                                 --bufferLength;
1834
1835                                 if (bufferLength == 0) {
1836                                         edge_serial->rxState = EXPECT_HDR2;
1837                                         break;
1838                                 }
1839                                 /* otherwise, drop on through */
1840
1841                         case EXPECT_HDR2:
1842                                 edge_serial->rxHeader2 = *buffer;
1843                                 ++buffer;
1844                                 --bufferLength;
1845
1846                                 dbg("%s - Hdr1=%02X Hdr2=%02X", __FUNCTION__, edge_serial->rxHeader1, edge_serial->rxHeader2);
1847
1848                                 // Process depending on whether this header is
1849                                 // data or status
1850
1851                                 if (IS_CMD_STAT_HDR(edge_serial->rxHeader1)) {
1852                                         // Decode this status header and goto EXPECT_HDR1 (if we
1853                                         // can process the status with only 2 bytes), or goto
1854                                         // EXPECT_HDR3 to get the third byte.
1855
1856                                         edge_serial->rxPort       = IOSP_GET_HDR_PORT(edge_serial->rxHeader1);
1857                                         edge_serial->rxStatusCode = IOSP_GET_STATUS_CODE(edge_serial->rxHeader1);
1858
1859                                         if (!IOSP_STATUS_IS_2BYTE(edge_serial->rxStatusCode)) {
1860                                                 // This status needs additional bytes. Save what we have
1861                                                 // and then wait for more data.
1862                                                 edge_serial->rxStatusParam = edge_serial->rxHeader2;
1863
1864                                                 edge_serial->rxState = EXPECT_HDR3;
1865                                                 break;
1866                                         }
1867
1868                                         // We have all the header bytes, process the status now
1869                                         process_rcvd_status (edge_serial, edge_serial->rxHeader2, 0);
1870                                         edge_serial->rxState = EXPECT_HDR1;
1871                                         break;
1872                                 } else {
1873                                         edge_serial->rxPort = IOSP_GET_HDR_PORT(edge_serial->rxHeader1);
1874                                         edge_serial->rxBytesRemaining = IOSP_GET_HDR_DATA_LEN(edge_serial->rxHeader1, edge_serial->rxHeader2);
1875
1876                                         dbg("%s - Data for Port %u Len %u", __FUNCTION__, edge_serial->rxPort, edge_serial->rxBytesRemaining);
1877
1878                                         //ASSERT( DevExt->RxPort < DevExt->NumPorts );
1879                                         //ASSERT( DevExt->RxBytesRemaining < IOSP_MAX_DATA_LENGTH );
1880
1881                                         if (bufferLength == 0 ) {
1882                                                 edge_serial->rxState = EXPECT_DATA;
1883                                                 break;
1884                                         }
1885                                         // Else, drop through
1886                                 }
1887
1888                         case EXPECT_DATA:       // Expect data
1889
1890                                 if (bufferLength < edge_serial->rxBytesRemaining) {
1891                                         rxLen = bufferLength;
1892                                         edge_serial->rxState = EXPECT_DATA;     // Expect data to start next buffer
1893                                 } else {
1894                                         // BufLen >= RxBytesRemaining
1895                                         rxLen = edge_serial->rxBytesRemaining;
1896                                         edge_serial->rxState = EXPECT_HDR1;     // Start another header next time
1897                                 }
1898
1899                                 bufferLength -= rxLen;
1900                                 edge_serial->rxBytesRemaining -= rxLen;
1901
1902                                 /* spit this data back into the tty driver if this port is open */
1903                                 if (rxLen) {
1904                                         port = edge_serial->serial->port[edge_serial->rxPort];
1905                                         edge_port = usb_get_serial_port_data(port);
1906                                         if (edge_port->open) {
1907                                                 tty = edge_port->port->tty;
1908                                                 if (tty) {
1909                                                         dbg("%s - Sending %d bytes to TTY for port %d", __FUNCTION__, rxLen, edge_serial->rxPort);
1910                                                         edge_tty_recv(&edge_serial->serial->dev->dev, tty, buffer, rxLen);
1911                                                 }
1912                                                 edge_port->icount.rx += rxLen;
1913                                         }
1914                                         buffer += rxLen;
1915                                 }
1916
1917                                 break;
1918
1919                         case EXPECT_HDR3:                       // Expect 3rd byte of status header
1920                                 edge_serial->rxHeader3 = *buffer;
1921                                 ++buffer;
1922                                 --bufferLength;
1923
1924                                 // We have all the header bytes, process the status now
1925                                 process_rcvd_status (edge_serial, edge_serial->rxStatusParam, edge_serial->rxHeader3);
1926                                 edge_serial->rxState = EXPECT_HDR1;
1927                                 break;
1928
1929                 }
1930         }
1931 }
1932
1933
1934 /*****************************************************************************
1935  * process_rcvd_status
1936  *      this function handles the any status messages received on the bulk in pipe.
1937  *****************************************************************************/
1938 static void process_rcvd_status (struct edgeport_serial *edge_serial, __u8 byte2, __u8 byte3)
1939 {
1940         struct usb_serial_port *port;
1941         struct edgeport_port *edge_port;
1942         __u8 code = edge_serial->rxStatusCode;
1943
1944         /* switch the port pointer to the one being currently talked about */
1945         port = edge_serial->serial->port[edge_serial->rxPort];
1946         edge_port = usb_get_serial_port_data(port);
1947         if (edge_port == NULL) {
1948                 dev_err(&edge_serial->serial->dev->dev, "%s - edge_port == NULL for port %d\n", __FUNCTION__, edge_serial->rxPort);
1949                 return;
1950         }
1951
1952         dbg("%s - port %d", __FUNCTION__, edge_serial->rxPort);
1953
1954         if (code == IOSP_EXT_STATUS) {
1955                 switch (byte2) {
1956                         case IOSP_EXT_STATUS_CHASE_RSP:
1957                                 // we want to do EXT status regardless of port open/closed
1958                                 dbg("%s - Port %u EXT CHASE_RSP Data = %02x", __FUNCTION__, edge_serial->rxPort, byte3 );
1959                                 // Currently, the only EXT_STATUS is Chase, so process here instead of one more call
1960                                 // to one more subroutine. If/when more EXT_STATUS, there'll be more work to do.
1961                                 // Also, we currently clear flag and close the port regardless of content of above's Byte3.
1962                                 // We could choose to do something else when Byte3 says Timeout on Chase from Edgeport,
1963                                 // like wait longer in block_until_chase_response, but for now we don't.
1964                                 edge_port->chaseResponsePending = false;
1965                                 wake_up (&edge_port->wait_chase);
1966                                 return;
1967
1968                         case IOSP_EXT_STATUS_RX_CHECK_RSP:
1969                                 dbg("%s ========== Port %u CHECK_RSP Sequence = %02x =============\n", __FUNCTION__, edge_serial->rxPort, byte3 );
1970                                 //Port->RxCheckRsp = true;
1971                                 return;
1972                 }
1973         }
1974
1975         if (code == IOSP_STATUS_OPEN_RSP) {
1976                 edge_port->txCredits = GET_TX_BUFFER_SIZE(byte3);
1977                 edge_port->maxTxCredits = edge_port->txCredits;
1978                 dbg("%s - Port %u Open Response Inital MSR = %02x TxBufferSize = %d", __FUNCTION__, edge_serial->rxPort, byte2, edge_port->txCredits);
1979                 handle_new_msr (edge_port, byte2);
1980
1981                 /* send the current line settings to the port so we are in sync with any further termios calls */
1982                 if (edge_port->port->tty)
1983                         change_port_settings (edge_port, edge_port->port->tty->termios);
1984
1985                 /* we have completed the open */
1986                 edge_port->openPending = false;
1987                 edge_port->open = true;
1988                 wake_up(&edge_port->wait_open);
1989                 return;
1990         }
1991
1992         // If port is closed, silently discard all rcvd status. We can
1993         // have cases where buffered status is received AFTER the close
1994         // port command is sent to the Edgeport.
1995         if (!edge_port->open || edge_port->closePending) {
1996                 return;
1997         }
1998
1999         switch (code) {
2000                 // Not currently sent by Edgeport
2001                 case IOSP_STATUS_LSR:
2002                         dbg("%s - Port %u LSR Status = %02x", __FUNCTION__, edge_serial->rxPort, byte2);
2003                         handle_new_lsr(edge_port, false, byte2, 0);
2004                         break;
2005
2006                 case IOSP_STATUS_LSR_DATA:
2007                         dbg("%s - Port %u LSR Status = %02x, Data = %02x", __FUNCTION__, edge_serial->rxPort, byte2, byte3);
2008                         // byte2 is LSR Register
2009                         // byte3 is broken data byte
2010                         handle_new_lsr(edge_port, true, byte2, byte3);
2011                         break;
2012                         //
2013                         //      case IOSP_EXT_4_STATUS:
2014                         //              dbg("%s - Port %u LSR Status = %02x Data = %02x", __FUNCTION__, edge_serial->rxPort, byte2, byte3);
2015                         //              break;
2016                         //
2017                 case IOSP_STATUS_MSR:
2018                         dbg("%s - Port %u MSR Status = %02x", __FUNCTION__, edge_serial->rxPort, byte2);
2019
2020                         // Process this new modem status and generate appropriate
2021                         // events, etc, based on the new status. This routine
2022                         // also saves the MSR in Port->ShadowMsr.
2023                         handle_new_msr(edge_port, byte2);
2024                         break;
2025
2026                 default:
2027                         dbg("%s - Unrecognized IOSP status code %u\n", __FUNCTION__, code);
2028                         break;
2029         }
2030
2031         return;
2032 }
2033
2034
2035 /*****************************************************************************
2036  * edge_tty_recv
2037  *      this function passes data on to the tty flip buffer
2038  *****************************************************************************/
2039 static void edge_tty_recv(struct device *dev, struct tty_struct *tty, unsigned char *data, int length)
2040 {
2041         int cnt;
2042
2043         do {
2044                 cnt = tty_buffer_request_room(tty, length);
2045                 if (cnt < length) {
2046                         dev_err(dev, "%s - dropping data, %d bytes lost\n",
2047                                         __FUNCTION__, length - cnt);
2048                         if(cnt == 0)
2049                                 break;
2050                 }
2051                 tty_insert_flip_string(tty, data, cnt);
2052                 data += cnt;
2053                 length -= cnt;
2054         } while (length > 0);
2055
2056         tty_flip_buffer_push(tty);
2057 }
2058
2059
2060 /*****************************************************************************
2061  * handle_new_msr
2062  *      this function handles any change to the msr register for a port.
2063  *****************************************************************************/
2064 static void handle_new_msr(struct edgeport_port *edge_port, __u8 newMsr)
2065 {
2066         struct  async_icount *icount;
2067
2068         dbg("%s %02x", __FUNCTION__, newMsr);
2069
2070         if (newMsr & (EDGEPORT_MSR_DELTA_CTS | EDGEPORT_MSR_DELTA_DSR | EDGEPORT_MSR_DELTA_RI | EDGEPORT_MSR_DELTA_CD)) {
2071                 icount = &edge_port->icount;
2072
2073                 /* update input line counters */
2074                 if (newMsr & EDGEPORT_MSR_DELTA_CTS) {
2075                         icount->cts++;
2076                 }
2077                 if (newMsr & EDGEPORT_MSR_DELTA_DSR) {
2078                         icount->dsr++;
2079                 }
2080                 if (newMsr & EDGEPORT_MSR_DELTA_CD) {
2081                         icount->dcd++;
2082                 }
2083                 if (newMsr & EDGEPORT_MSR_DELTA_RI) {
2084                         icount->rng++;
2085                 }
2086                 wake_up_interruptible(&edge_port->delta_msr_wait);
2087         }
2088
2089         /* Save the new modem status */
2090         edge_port->shadowMSR = newMsr & 0xf0;
2091
2092         return;
2093 }
2094
2095
2096 /*****************************************************************************
2097  * handle_new_lsr
2098  *      this function handles any change to the lsr register for a port.
2099  *****************************************************************************/
2100 static void handle_new_lsr(struct edgeport_port *edge_port, __u8 lsrData, __u8 lsr, __u8 data)
2101 {
2102         __u8    newLsr = (__u8)(lsr & (__u8)(LSR_OVER_ERR | LSR_PAR_ERR | LSR_FRM_ERR | LSR_BREAK));
2103         struct  async_icount *icount;
2104
2105         dbg("%s - %02x", __FUNCTION__, newLsr);
2106
2107         edge_port->shadowLSR = lsr;
2108
2109         if (newLsr & LSR_BREAK) {
2110                 //
2111                 // Parity and Framing errors only count if they
2112                 // occur exclusive of a break being
2113                 // received.
2114                 //
2115                 newLsr &= (__u8)(LSR_OVER_ERR | LSR_BREAK);
2116         }
2117
2118         /* Place LSR data byte into Rx buffer */
2119         if (lsrData && edge_port->port->tty)
2120                 edge_tty_recv(&edge_port->port->dev, edge_port->port->tty, &data, 1);
2121
2122         /* update input line counters */
2123         icount = &edge_port->icount;
2124         if (newLsr & LSR_BREAK) {
2125                 icount->brk++;
2126         }
2127         if (newLsr & LSR_OVER_ERR) {
2128                 icount->overrun++;
2129         }
2130         if (newLsr & LSR_PAR_ERR) {
2131                 icount->parity++;
2132         }
2133         if (newLsr & LSR_FRM_ERR) {
2134                 icount->frame++;
2135         }
2136
2137         return;
2138 }
2139
2140
2141 /****************************************************************************
2142  * sram_write
2143  *      writes a number of bytes to the Edgeport device's sram starting at the
2144  *      given address.
2145  *      If successful returns the number of bytes written, otherwise it returns
2146  *      a negative error number of the problem.
2147  ****************************************************************************/
2148 static int sram_write (struct usb_serial *serial, __u16 extAddr, __u16 addr, __u16 length, __u8 *data)
2149 {
2150         int result;
2151         __u16 current_length;
2152         unsigned char *transfer_buffer;
2153
2154         dbg("%s - %x, %x, %d", __FUNCTION__, extAddr, addr, length);
2155
2156         transfer_buffer =  kmalloc (64, GFP_KERNEL);
2157         if (!transfer_buffer) {
2158                 dev_err(&serial->dev->dev, "%s - kmalloc(%d) failed.\n", __FUNCTION__, 64);
2159                 return -ENOMEM;
2160         }
2161
2162         /* need to split these writes up into 64 byte chunks */
2163         result = 0;
2164         while (length > 0) {
2165                 if (length > 64) {
2166                         current_length = 64;
2167                 } else {
2168                         current_length = length;
2169                 }
2170 //              dbg("%s - writing %x, %x, %d", __FUNCTION__, extAddr, addr, current_length);
2171                 memcpy (transfer_buffer, data, current_length);
2172                 result = usb_control_msg (serial->dev, usb_sndctrlpipe(serial->dev, 0), USB_REQUEST_ION_WRITE_RAM,
2173                                           0x40, addr, extAddr, transfer_buffer, current_length, 300);
2174                 if (result < 0)
2175                         break;
2176                 length -= current_length;
2177                 addr += current_length;
2178                 data += current_length;
2179         }
2180
2181         kfree (transfer_buffer);
2182         return result;
2183 }
2184
2185
2186 /****************************************************************************
2187  * rom_write
2188  *      writes a number of bytes to the Edgeport device's ROM starting at the
2189  *      given address.
2190  *      If successful returns the number of bytes written, otherwise it returns
2191  *      a negative error number of the problem.
2192  ****************************************************************************/
2193 static int rom_write (struct usb_serial *serial, __u16 extAddr, __u16 addr, __u16 length, __u8 *data)
2194 {
2195         int result;
2196         __u16 current_length;
2197         unsigned char *transfer_buffer;
2198
2199 //      dbg("%s - %x, %x, %d", __FUNCTION__, extAddr, addr, length);
2200
2201         transfer_buffer =  kmalloc (64, GFP_KERNEL);
2202         if (!transfer_buffer) {
2203                 dev_err(&serial->dev->dev, "%s - kmalloc(%d) failed.\n", __FUNCTION__, 64);
2204                 return -ENOMEM;
2205         }
2206
2207         /* need to split these writes up into 64 byte chunks */
2208         result = 0;
2209         while (length > 0) {
2210                 if (length > 64) {
2211                         current_length = 64;
2212                 } else {
2213                         current_length = length;
2214                 }
2215 //              dbg("%s - writing %x, %x, %d", __FUNCTION__, extAddr, addr, current_length);
2216                 memcpy (transfer_buffer, data, current_length);
2217                 result = usb_control_msg (serial->dev, usb_sndctrlpipe(serial->dev, 0), USB_REQUEST_ION_WRITE_ROM,
2218                                           0x40, addr, extAddr, transfer_buffer, current_length, 300);
2219                 if (result < 0)
2220                         break;
2221                 length -= current_length;
2222                 addr += current_length;
2223                 data += current_length;
2224         }
2225
2226         kfree (transfer_buffer);
2227         return result;
2228 }
2229
2230
2231 /****************************************************************************
2232  * rom_read
2233  *      reads a number of bytes from the Edgeport device starting at the given
2234  *      address.
2235  *      If successful returns the number of bytes read, otherwise it returns
2236  *      a negative error number of the problem.
2237  ****************************************************************************/
2238 static int rom_read (struct usb_serial *serial, __u16 extAddr, __u16 addr, __u16 length, __u8 *data)
2239 {
2240         int result;
2241         __u16 current_length;
2242         unsigned char *transfer_buffer;
2243
2244         dbg("%s - %x, %x, %d", __FUNCTION__, extAddr, addr, length);
2245
2246         transfer_buffer =  kmalloc (64, GFP_KERNEL);
2247         if (!transfer_buffer) {
2248                 dev_err(&serial->dev->dev, "%s - kmalloc(%d) failed.\n", __FUNCTION__, 64);
2249                 return -ENOMEM;
2250         }
2251
2252         /* need to split these reads up into 64 byte chunks */
2253         result = 0;
2254         while (length > 0) {
2255                 if (length > 64) {
2256                         current_length = 64;
2257                 } else {
2258                         current_length = length;
2259                 }
2260 //              dbg("%s - %x, %x, %d", __FUNCTION__, extAddr, addr, current_length);
2261                 result = usb_control_msg (serial->dev, usb_rcvctrlpipe(serial->dev, 0), USB_REQUEST_ION_READ_ROM,
2262                                           0xC0, addr, extAddr, transfer_buffer, current_length, 300);
2263                 if (result < 0)
2264                         break;
2265                 memcpy (data, transfer_buffer, current_length);
2266                 length -= current_length;
2267                 addr += current_length;
2268                 data += current_length;
2269         }
2270
2271         kfree (transfer_buffer);
2272         return result;
2273 }
2274
2275
2276 /****************************************************************************
2277  * send_iosp_ext_cmd
2278  *      Is used to send a IOSP message to the Edgeport device
2279  ****************************************************************************/
2280 static int send_iosp_ext_cmd (struct edgeport_port *edge_port, __u8 command, __u8 param)
2281 {
2282         unsigned char   *buffer;
2283         unsigned char   *currentCommand;
2284         int             length = 0;
2285         int             status = 0;
2286
2287         dbg("%s - %d, %d", __FUNCTION__, command, param);
2288
2289         buffer =  kmalloc (10, GFP_ATOMIC);
2290         if (!buffer) {
2291                 dev_err(&edge_port->port->dev, "%s - kmalloc(%d) failed.\n", __FUNCTION__, 10);
2292                 return -ENOMEM;
2293         }
2294
2295         currentCommand = buffer;
2296
2297         MAKE_CMD_EXT_CMD (&currentCommand, &length,
2298                           edge_port->port->number - edge_port->port->serial->minor,
2299                           command, param);
2300
2301         status = write_cmd_usb (edge_port, buffer, length);
2302         if (status) {
2303                 /* something bad happened, let's free up the memory */
2304                 kfree(buffer);
2305         }
2306
2307         return status;
2308 }
2309
2310
2311 /*****************************************************************************
2312  * write_cmd_usb
2313  *      this function writes the given buffer out to the bulk write endpoint.
2314  *****************************************************************************/
2315 static int write_cmd_usb (struct edgeport_port *edge_port, unsigned char *buffer, int length)
2316 {
2317         struct edgeport_serial *edge_serial = usb_get_serial_data(edge_port->port->serial);
2318         int status = 0;
2319         struct urb *urb;
2320         int timeout;
2321
2322         usb_serial_debug_data(debug, &edge_port->port->dev, __FUNCTION__, length, buffer);
2323
2324         /* Allocate our next urb */
2325         urb = usb_alloc_urb (0, GFP_ATOMIC);
2326         if (!urb)
2327                 return -ENOMEM;
2328
2329         atomic_inc(&CmdUrbs);
2330         dbg("%s - ALLOCATE URB %p (outstanding %d)", __FUNCTION__, urb, atomic_read(&CmdUrbs));
2331
2332         usb_fill_bulk_urb (urb, edge_serial->serial->dev,
2333                        usb_sndbulkpipe(edge_serial->serial->dev, edge_serial->bulk_out_endpoint),
2334                        buffer, length, edge_bulk_out_cmd_callback, edge_port);
2335
2336         edge_port->commandPending = true;
2337         status = usb_submit_urb(urb, GFP_ATOMIC);
2338
2339         if (status) {
2340                 /* something went wrong */
2341                 dev_err(&edge_port->port->dev, "%s - usb_submit_urb(write command) failed, status = %d\n", __FUNCTION__, status);
2342                 usb_kill_urb(urb);
2343                 usb_free_urb(urb);
2344                 atomic_dec(&CmdUrbs);
2345                 return status;
2346         }
2347
2348         // wait for command to finish
2349         timeout = COMMAND_TIMEOUT;
2350 #if 0
2351         wait_event (&edge_port->wait_command, !edge_port->commandPending);
2352
2353         if (edge_port->commandPending) {
2354                 /* command timed out */
2355                 dbg("%s - command timed out", __FUNCTION__);
2356                 status = -EINVAL;
2357         }
2358 #endif
2359         return status;
2360 }
2361
2362
2363 /*****************************************************************************
2364  * send_cmd_write_baud_rate
2365  *      this function sends the proper command to change the baud rate of the
2366  *      specified port.
2367  *****************************************************************************/
2368 static int send_cmd_write_baud_rate (struct edgeport_port *edge_port, int baudRate)
2369 {
2370         struct edgeport_serial *edge_serial = usb_get_serial_data(edge_port->port->serial);
2371         unsigned char *cmdBuffer;
2372         unsigned char *currCmd;
2373         int cmdLen = 0;
2374         int divisor;
2375         int status;
2376         unsigned char number = edge_port->port->number - edge_port->port->serial->minor;
2377
2378         if ((!edge_serial->is_epic) ||
2379             ((edge_serial->is_epic) &&
2380              (!edge_serial->epic_descriptor.Supports.IOSPSetBaudRate))) {
2381                 dbg("SendCmdWriteBaudRate - NOT Setting baud rate for port = %d, baud = %d",
2382                     edge_port->port->number, baudRate);
2383                 return 0;
2384         }
2385
2386         dbg("%s - port = %d, baud = %d", __FUNCTION__, edge_port->port->number, baudRate);
2387
2388         status = calc_baud_rate_divisor (baudRate, &divisor);
2389         if (status) {
2390                 dev_err(&edge_port->port->dev, "%s - bad baud rate\n", __FUNCTION__);
2391                 return status;
2392         }
2393
2394         // Alloc memory for the string of commands.
2395         cmdBuffer =  kmalloc (0x100, GFP_ATOMIC);
2396         if (!cmdBuffer) {
2397                 dev_err(&edge_port->port->dev, "%s - kmalloc(%d) failed.\n", __FUNCTION__, 0x100);
2398                 return -ENOMEM;
2399         }
2400         currCmd = cmdBuffer;
2401
2402         // Enable access to divisor latch
2403         MAKE_CMD_WRITE_REG( &currCmd, &cmdLen, number, LCR, LCR_DL_ENABLE );
2404
2405         // Write the divisor itself
2406         MAKE_CMD_WRITE_REG( &currCmd, &cmdLen, number, DLL, LOW8 (divisor) );
2407         MAKE_CMD_WRITE_REG( &currCmd, &cmdLen, number, DLM, HIGH8(divisor) );
2408
2409         // Restore original value to disable access to divisor latch
2410         MAKE_CMD_WRITE_REG( &currCmd, &cmdLen, number, LCR, edge_port->shadowLCR);
2411
2412         status = write_cmd_usb(edge_port, cmdBuffer, cmdLen );
2413         if (status) {
2414                 /* something bad happened, let's free up the memory */
2415                 kfree (cmdBuffer);
2416         }
2417
2418         return status;
2419 }
2420
2421
2422 /*****************************************************************************
2423  * calc_baud_rate_divisor
2424  *      this function calculates the proper baud rate divisor for the specified
2425  *      baud rate.
2426  *****************************************************************************/
2427 static int calc_baud_rate_divisor (int baudrate, int *divisor)
2428 {
2429         int i;
2430         __u16 custom;
2431
2432
2433         dbg("%s - %d", __FUNCTION__, baudrate);
2434
2435         for (i = 0; i < ARRAY_SIZE(divisor_table); i++) {
2436                 if ( divisor_table[i].BaudRate == baudrate ) {
2437                         *divisor = divisor_table[i].Divisor;
2438                         return 0;
2439                 }
2440         }
2441
2442         // We have tried all of the standard baud rates
2443         // lets try to calculate the divisor for this baud rate
2444         // Make sure the baud rate is reasonable
2445         if (baudrate > 50 && baudrate < 230400) {
2446                 // get divisor
2447                 custom = (__u16)((230400L + baudrate/2) / baudrate);
2448
2449                 *divisor = custom;
2450
2451                 dbg("%s - Baud %d = %d\n", __FUNCTION__, baudrate, custom);
2452                 return 0;
2453         }
2454
2455         return -1;
2456 }
2457
2458
2459 /*****************************************************************************
2460  * send_cmd_write_uart_register
2461  *      this function builds up a uart register message and sends to to the device.
2462  *****************************************************************************/
2463 static int send_cmd_write_uart_register (struct edgeport_port *edge_port, __u8 regNum, __u8 regValue)
2464 {
2465         struct edgeport_serial *edge_serial = usb_get_serial_data(edge_port->port->serial);
2466         unsigned char *cmdBuffer;
2467         unsigned char *currCmd;
2468         unsigned long cmdLen = 0;
2469         int status;
2470
2471         dbg("%s - write to %s register 0x%02x", (regNum == MCR) ? "MCR" : "LCR", __FUNCTION__, regValue);
2472
2473         if ((!edge_serial->is_epic) ||
2474             ((edge_serial->is_epic) &&
2475              (!edge_serial->epic_descriptor.Supports.IOSPWriteMCR) &&
2476              (regNum == MCR))) {
2477                 dbg("SendCmdWriteUartReg - Not writing to MCR Register");
2478                 return 0;
2479         }
2480
2481         if ((!edge_serial->is_epic) ||
2482             ((edge_serial->is_epic) &&
2483              (!edge_serial->epic_descriptor.Supports.IOSPWriteLCR) &&
2484              (regNum == LCR))) {
2485                 dbg ("SendCmdWriteUartReg - Not writing to LCR Register");
2486                 return 0;
2487         }
2488
2489         // Alloc memory for the string of commands.
2490         cmdBuffer = kmalloc (0x10, GFP_ATOMIC);
2491         if (cmdBuffer == NULL ) {
2492                 return -ENOMEM;
2493         }
2494
2495         currCmd = cmdBuffer;
2496
2497         // Build a cmd in the buffer to write the given register
2498         MAKE_CMD_WRITE_REG (&currCmd, &cmdLen,
2499                             edge_port->port->number - edge_port->port->serial->minor,
2500                             regNum, regValue);
2501
2502         status = write_cmd_usb(edge_port, cmdBuffer, cmdLen);
2503         if (status) {
2504                 /* something bad happened, let's free up the memory */
2505                 kfree (cmdBuffer);
2506         }
2507
2508         return status;
2509 }
2510
2511
2512 /*****************************************************************************
2513  * change_port_settings
2514  *      This routine is called to set the UART on the device to match the specified
2515  *      new settings.
2516  *****************************************************************************/
2517 #ifndef CMSPAR
2518 #define CMSPAR 0
2519 #endif
2520 static void change_port_settings (struct edgeport_port *edge_port, struct ktermios *old_termios)
2521 {
2522         struct edgeport_serial *edge_serial = usb_get_serial_data(edge_port->port->serial);
2523         struct tty_struct *tty;
2524         int baud;
2525         unsigned cflag;
2526         __u8 mask = 0xff;
2527         __u8 lData;
2528         __u8 lParity;
2529         __u8 lStop;
2530         __u8 rxFlow;
2531         __u8 txFlow;
2532         int status;
2533
2534         dbg("%s - port %d", __FUNCTION__, edge_port->port->number);
2535
2536         if (!edge_port->open &&
2537             !edge_port->openPending) {
2538                 dbg("%s - port not opened", __FUNCTION__);
2539                 return;
2540         }
2541
2542         tty = edge_port->port->tty;
2543         if ((!tty) ||
2544             (!tty->termios)) {
2545                 dbg("%s - no tty structures", __FUNCTION__);
2546                 return;
2547         }
2548
2549         cflag = tty->termios->c_cflag;
2550
2551         switch (cflag & CSIZE) {
2552                 case CS5:   lData = LCR_BITS_5; mask = 0x1f;    dbg("%s - data bits = 5", __FUNCTION__);   break;
2553                 case CS6:   lData = LCR_BITS_6; mask = 0x3f;    dbg("%s - data bits = 6", __FUNCTION__);   break;
2554                 case CS7:   lData = LCR_BITS_7; mask = 0x7f;    dbg("%s - data bits = 7", __FUNCTION__);   break;
2555                 default:
2556                 case CS8:   lData = LCR_BITS_8;                 dbg("%s - data bits = 8", __FUNCTION__);   break;
2557         }
2558
2559         lParity = LCR_PAR_NONE;
2560         if (cflag & PARENB) {
2561                 if (cflag & CMSPAR) {
2562                         if (cflag & PARODD) {
2563                                 lParity = LCR_PAR_MARK;
2564                                 dbg("%s - parity = mark", __FUNCTION__);
2565                         } else {
2566                                 lParity = LCR_PAR_SPACE;
2567                                 dbg("%s - parity = space", __FUNCTION__);
2568                         }
2569                 } else if (cflag & PARODD) {
2570                         lParity = LCR_PAR_ODD;
2571                         dbg("%s - parity = odd", __FUNCTION__);
2572                 } else {
2573                         lParity = LCR_PAR_EVEN;
2574                         dbg("%s - parity = even", __FUNCTION__);
2575                 }
2576         } else {
2577                 dbg("%s - parity = none", __FUNCTION__);
2578         }
2579
2580         if (cflag & CSTOPB) {
2581                 lStop = LCR_STOP_2;
2582                 dbg("%s - stop bits = 2", __FUNCTION__);
2583         } else {
2584                 lStop = LCR_STOP_1;
2585                 dbg("%s - stop bits = 1", __FUNCTION__);
2586         }
2587
2588         /* figure out the flow control settings */
2589         rxFlow = txFlow = 0x00;
2590         if (cflag & CRTSCTS) {
2591                 rxFlow |= IOSP_RX_FLOW_RTS;
2592                 txFlow |= IOSP_TX_FLOW_CTS;
2593                 dbg("%s - RTS/CTS is enabled", __FUNCTION__);
2594         } else {
2595                 dbg("%s - RTS/CTS is disabled", __FUNCTION__);
2596         }
2597
2598         /* if we are implementing XON/XOFF, set the start and stop character in the device */
2599         if (I_IXOFF(tty) || I_IXON(tty)) {
2600                 unsigned char stop_char  = STOP_CHAR(tty);
2601                 unsigned char start_char = START_CHAR(tty);
2602
2603                 if ((!edge_serial->is_epic) ||
2604                     ((edge_serial->is_epic) &&
2605                      (edge_serial->epic_descriptor.Supports.IOSPSetXChar))) {
2606                         send_iosp_ext_cmd(edge_port, IOSP_CMD_SET_XON_CHAR, start_char);
2607                         send_iosp_ext_cmd(edge_port, IOSP_CMD_SET_XOFF_CHAR, stop_char);
2608                 }
2609
2610                 /* if we are implementing INBOUND XON/XOFF */
2611                 if (I_IXOFF(tty)) {
2612                         rxFlow |= IOSP_RX_FLOW_XON_XOFF;
2613                         dbg("%s - INBOUND XON/XOFF is enabled, XON = %2x, XOFF = %2x", __FUNCTION__, start_char, stop_char);
2614                 } else {
2615                         dbg("%s - INBOUND XON/XOFF is disabled", __FUNCTION__);
2616                 }
2617
2618                 /* if we are implementing OUTBOUND XON/XOFF */
2619                 if (I_IXON(tty)) {
2620                         txFlow |= IOSP_TX_FLOW_XON_XOFF;
2621                         dbg("%s - OUTBOUND XON/XOFF is enabled, XON = %2x, XOFF = %2x", __FUNCTION__, start_char, stop_char);
2622                 } else {
2623                         dbg("%s - OUTBOUND XON/XOFF is disabled", __FUNCTION__);
2624                 }
2625         }
2626
2627         /* Set flow control to the configured value */
2628         if ((!edge_serial->is_epic) ||
2629             ((edge_serial->is_epic) &&
2630              (edge_serial->epic_descriptor.Supports.IOSPSetRxFlow)))
2631                 send_iosp_ext_cmd(edge_port, IOSP_CMD_SET_RX_FLOW, rxFlow);
2632         if ((!edge_serial->is_epic) ||
2633             ((edge_serial->is_epic) &&
2634              (edge_serial->epic_descriptor.Supports.IOSPSetTxFlow)))
2635                 send_iosp_ext_cmd(edge_port, IOSP_CMD_SET_TX_FLOW, txFlow);
2636
2637
2638         edge_port->shadowLCR &= ~(LCR_BITS_MASK | LCR_STOP_MASK | LCR_PAR_MASK);
2639         edge_port->shadowLCR |= (lData | lParity | lStop);
2640
2641         edge_port->validDataMask = mask;
2642
2643         /* Send the updated LCR value to the EdgePort */
2644         status = send_cmd_write_uart_register(edge_port, LCR, edge_port->shadowLCR);
2645         if (status != 0) {
2646                 return;
2647         }
2648
2649         /* set up the MCR register and send it to the EdgePort */
2650         edge_port->shadowMCR = MCR_MASTER_IE;
2651         if (cflag & CBAUD) {
2652                 edge_port->shadowMCR |= (MCR_DTR | MCR_RTS);
2653         }
2654         status = send_cmd_write_uart_register(edge_port, MCR, edge_port->shadowMCR);
2655         if (status != 0) {
2656                 return;
2657         }
2658
2659         /* Determine divisor based on baud rate */
2660         baud = tty_get_baud_rate(tty);
2661         if (!baud) {
2662                 /* pick a default, any default... */
2663                 baud = 9600;
2664         }
2665
2666         dbg("%s - baud rate = %d", __FUNCTION__, baud);
2667         status = send_cmd_write_baud_rate (edge_port, baud);
2668
2669         return;
2670 }
2671
2672
2673 /****************************************************************************
2674  * unicode_to_ascii
2675  *      Turns a string from Unicode into ASCII.
2676  *      Doesn't do a good job with any characters that are outside the normal
2677  *      ASCII range, but it's only for debugging...
2678  *      NOTE: expects the unicode in LE format
2679  ****************************************************************************/
2680 static void unicode_to_ascii(char *string, int buflen, __le16 *unicode, int unicode_size)
2681 {
2682         int i;
2683
2684         if (buflen <= 0)        /* never happens, but... */
2685                 return;
2686         --buflen;               /* space for nul */
2687
2688         for (i = 0; i < unicode_size; i++) {
2689                 if (i >= buflen)
2690                         break;
2691                 string[i] = (char)(le16_to_cpu(unicode[i]));
2692         }
2693         string[i] = 0x00;
2694 }
2695
2696
2697 /****************************************************************************
2698  * get_manufacturing_desc
2699  *      reads in the manufacturing descriptor and stores it into the serial
2700  *      structure.
2701  ****************************************************************************/
2702 static void get_manufacturing_desc (struct edgeport_serial *edge_serial)
2703 {
2704         int response;
2705
2706         dbg("getting manufacturer descriptor");
2707
2708         response = rom_read (edge_serial->serial, (EDGE_MANUF_DESC_ADDR & 0xffff0000) >> 16,
2709                             (__u16)(EDGE_MANUF_DESC_ADDR & 0x0000ffff), EDGE_MANUF_DESC_LEN,
2710                             (__u8 *)(&edge_serial->manuf_descriptor));
2711
2712         if (response < 1) {
2713                 dev_err(&edge_serial->serial->dev->dev, "error in getting manufacturer descriptor\n");
2714         } else {
2715                 char string[30];
2716                 dbg("**Manufacturer Descriptor");
2717                 dbg("  RomSize:        %dK", edge_serial->manuf_descriptor.RomSize);
2718                 dbg("  RamSize:        %dK", edge_serial->manuf_descriptor.RamSize);
2719                 dbg("  CpuRev:         %d", edge_serial->manuf_descriptor.CpuRev);
2720                 dbg("  BoardRev:       %d", edge_serial->manuf_descriptor.BoardRev);
2721                 dbg("  NumPorts:       %d", edge_serial->manuf_descriptor.NumPorts);
2722                 dbg("  DescDate:       %d/%d/%d", edge_serial->manuf_descriptor.DescDate[0], edge_serial->manuf_descriptor.DescDate[1], edge_serial->manuf_descriptor.DescDate[2]+1900);
2723                 unicode_to_ascii(string, sizeof(string),
2724                     edge_serial->manuf_descriptor.SerialNumber,
2725                     edge_serial->manuf_descriptor.SerNumLength/2);
2726                 dbg("  SerialNumber: %s", string);
2727                 unicode_to_ascii(string, sizeof(string),
2728                     edge_serial->manuf_descriptor.AssemblyNumber,
2729                     edge_serial->manuf_descriptor.AssemblyNumLength/2);
2730                 dbg("  AssemblyNumber: %s", string);
2731                 unicode_to_ascii(string, sizeof(string),
2732                     edge_serial->manuf_descriptor.OemAssyNumber,
2733                     edge_serial->manuf_descriptor.OemAssyNumLength/2);
2734                 dbg("  OemAssyNumber:  %s", string);
2735                 dbg("  UartType:       %d", edge_serial->manuf_descriptor.UartType);
2736                 dbg("  IonPid:         %d", edge_serial->manuf_descriptor.IonPid);
2737                 dbg("  IonConfig:      %d", edge_serial->manuf_descriptor.IonConfig);
2738         }
2739 }
2740
2741
2742 /****************************************************************************
2743  * get_boot_desc
2744  *      reads in the bootloader descriptor and stores it into the serial
2745  *      structure.
2746  ****************************************************************************/
2747 static void get_boot_desc (struct edgeport_serial *edge_serial)
2748 {
2749         int response;
2750
2751         dbg("getting boot descriptor");
2752
2753         response = rom_read (edge_serial->serial, (EDGE_BOOT_DESC_ADDR & 0xffff0000) >> 16,
2754                             (__u16)(EDGE_BOOT_DESC_ADDR & 0x0000ffff), EDGE_BOOT_DESC_LEN,
2755                             (__u8 *)(&edge_serial->boot_descriptor));
2756
2757         if (response < 1) {
2758                 dev_err(&edge_serial->serial->dev->dev, "error in getting boot descriptor\n");
2759         } else {
2760                 dbg("**Boot Descriptor:");
2761                 dbg("  BootCodeLength: %d", le16_to_cpu(edge_serial->boot_descriptor.BootCodeLength));
2762                 dbg("  MajorVersion:   %d", edge_serial->boot_descriptor.MajorVersion);
2763                 dbg("  MinorVersion:   %d", edge_serial->boot_descriptor.MinorVersion);
2764                 dbg("  BuildNumber:    %d", le16_to_cpu(edge_serial->boot_descriptor.BuildNumber));
2765                 dbg("  Capabilities:   0x%x", le16_to_cpu(edge_serial->boot_descriptor.Capabilities));
2766                 dbg("  UConfig0:       %d", edge_serial->boot_descriptor.UConfig0);
2767                 dbg("  UConfig1:       %d", edge_serial->boot_descriptor.UConfig1);
2768         }
2769 }
2770
2771
2772 /****************************************************************************
2773  * load_application_firmware
2774  *      This is called to load the application firmware to the device
2775  ****************************************************************************/
2776 static void load_application_firmware (struct edgeport_serial *edge_serial)
2777 {
2778         struct edge_firmware_image_record *record;
2779         unsigned char *firmware;
2780         unsigned char *FirmwareImage;
2781         int ImageSize;
2782         int response;
2783
2784
2785         switch (edge_serial->product_info.iDownloadFile) {
2786                 case EDGE_DOWNLOAD_FILE_I930:
2787                         dbg("downloading firmware version (930) %d.%d.%d",
2788                             OperationalCodeImageVersion_GEN1.MajorVersion,
2789                             OperationalCodeImageVersion_GEN1.MinorVersion,
2790                             OperationalCodeImageVersion_GEN1.BuildNumber);
2791                         firmware = &OperationalCodeImage_GEN1[0];
2792                         FirmwareImage = &OperationalCodeImage_GEN1[0];
2793                         ImageSize = sizeof(OperationalCodeImage_GEN1);
2794                         break;
2795
2796                 case EDGE_DOWNLOAD_FILE_80251:
2797                         dbg("downloading firmware version (80251) %d.%d.%d",
2798                             OperationalCodeImageVersion_GEN2.MajorVersion,
2799                             OperationalCodeImageVersion_GEN2.MinorVersion,
2800                             OperationalCodeImageVersion_GEN2.BuildNumber);
2801                         firmware = &OperationalCodeImage_GEN2[0];
2802                         FirmwareImage = &OperationalCodeImage_GEN2[0];
2803                         ImageSize = sizeof(OperationalCodeImage_GEN2);
2804                         break;
2805
2806                 case EDGE_DOWNLOAD_FILE_NONE:
2807                         dbg     ("No download file specified, skipping download\n");
2808                         return;
2809
2810                 default:
2811                         return;
2812         }
2813
2814
2815         for (;;) {
2816                 record = (struct edge_firmware_image_record *)firmware;
2817                 response = sram_write (edge_serial->serial, le16_to_cpu(record->ExtAddr), le16_to_cpu(record->Addr), le16_to_cpu(record->Len), &record->Data[0]);
2818                 if (response < 0) {
2819                         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));
2820                         break;
2821                 }
2822                 firmware += sizeof (struct edge_firmware_image_record) + le16_to_cpu(record->Len);
2823                 if (firmware >= &FirmwareImage[ImageSize]) {
2824                         break;
2825                 }
2826         }
2827
2828         dbg("sending exec_dl_code");
2829         response = usb_control_msg (edge_serial->serial->dev,
2830                                     usb_sndctrlpipe(edge_serial->serial->dev, 0),
2831                                     USB_REQUEST_ION_EXEC_DL_CODE,
2832                                     0x40, 0x4000, 0x0001, NULL, 0, 3000);
2833
2834         return;
2835 }
2836
2837
2838 /****************************************************************************
2839  * edge_startup
2840  ****************************************************************************/
2841 static int edge_startup (struct usb_serial *serial)
2842 {
2843         struct edgeport_serial *edge_serial;
2844         struct edgeport_port *edge_port;
2845         struct usb_device *dev;
2846         int i, j;
2847         int response;
2848         bool interrupt_in_found;
2849         bool bulk_in_found;
2850         bool bulk_out_found;
2851         static __u32 descriptor[3] = {  EDGE_COMPATIBILITY_MASK0,
2852                                         EDGE_COMPATIBILITY_MASK1,
2853                                         EDGE_COMPATIBILITY_MASK2 };
2854
2855         dev = serial->dev;
2856
2857         /* create our private serial structure */
2858         edge_serial = kzalloc(sizeof(struct edgeport_serial), GFP_KERNEL);
2859         if (edge_serial == NULL) {
2860                 dev_err(&serial->dev->dev, "%s - Out of memory\n", __FUNCTION__);
2861                 return -ENOMEM;
2862         }
2863         spin_lock_init(&edge_serial->es_lock);
2864         edge_serial->serial = serial;
2865         usb_set_serial_data(serial, edge_serial);
2866
2867         /* get the name for the device from the device */
2868         i = get_string(dev, dev->descriptor.iManufacturer,
2869             &edge_serial->name[0], MAX_NAME_LEN+1);
2870         edge_serial->name[i++] = ' ';
2871         get_string(dev, dev->descriptor.iProduct,
2872             &edge_serial->name[i], MAX_NAME_LEN+2 - i);
2873
2874         dev_info(&serial->dev->dev, "%s detected\n", edge_serial->name);
2875
2876         /* Read the epic descriptor */
2877         if (get_epic_descriptor(edge_serial) <= 0) {
2878                 /* memcpy descriptor to Supports structures */
2879                 memcpy(&edge_serial->epic_descriptor.Supports, descriptor,
2880                        sizeof(struct edge_compatibility_bits));
2881
2882                 /* get the manufacturing descriptor for this device */
2883                 get_manufacturing_desc (edge_serial);
2884
2885                 /* get the boot descriptor */
2886                 get_boot_desc (edge_serial);
2887
2888                 get_product_info(edge_serial);
2889         }
2890
2891         /* set the number of ports from the manufacturing description */
2892         /* serial->num_ports = serial->product_info.NumPorts; */
2893         if ((!edge_serial->is_epic) &&
2894             (edge_serial->product_info.NumPorts != serial->num_ports)) {
2895                 dev_warn(&serial->dev->dev, "Device Reported %d serial ports "
2896                          "vs. core thinking we have %d ports, email "
2897                          "greg@kroah.com this information.",
2898                          edge_serial->product_info.NumPorts,
2899                          serial->num_ports);
2900         }
2901
2902         dbg("%s - time 1 %ld", __FUNCTION__, jiffies);
2903
2904         /* If not an EPiC device */
2905         if (!edge_serial->is_epic) {
2906                 /* now load the application firmware into this device */
2907                 load_application_firmware (edge_serial);
2908
2909                 dbg("%s - time 2 %ld", __FUNCTION__, jiffies);
2910
2911                 /* Check current Edgeport EEPROM and update if necessary */
2912                 update_edgeport_E2PROM (edge_serial);
2913
2914                 dbg("%s - time 3 %ld", __FUNCTION__, jiffies);
2915
2916                 /* set the configuration to use #1 */
2917 //              dbg("set_configuration 1");
2918 //              usb_set_configuration (dev, 1);
2919         }
2920
2921         /* we set up the pointers to the endpoints in the edge_open function,
2922          * as the structures aren't created yet. */
2923
2924         /* set up our port private structures */
2925         for (i = 0; i < serial->num_ports; ++i) {
2926                 edge_port = kmalloc (sizeof(struct edgeport_port), GFP_KERNEL);
2927                 if (edge_port == NULL) {
2928                         dev_err(&serial->dev->dev, "%s - Out of memory\n", __FUNCTION__);
2929                         for (j = 0; j < i; ++j) {
2930                                 kfree (usb_get_serial_port_data(serial->port[j]));
2931                                 usb_set_serial_port_data(serial->port[j],  NULL);
2932                         }
2933                         usb_set_serial_data(serial, NULL);
2934                         kfree(edge_serial);
2935                         return -ENOMEM;
2936                 }
2937                 memset (edge_port, 0, sizeof(struct edgeport_port));
2938                 spin_lock_init(&edge_port->ep_lock);
2939                 edge_port->port = serial->port[i];
2940                 usb_set_serial_port_data(serial->port[i], edge_port);
2941         }
2942
2943         response = 0;
2944
2945         if (edge_serial->is_epic) {
2946                 /* EPIC thing, set up our interrupt polling now and our read urb, so
2947                  * that the device knows it really is connected. */
2948                 interrupt_in_found = bulk_in_found = bulk_out_found = false;
2949                 for (i = 0; i < serial->interface->altsetting[0].desc.bNumEndpoints; ++i) {
2950                         struct usb_endpoint_descriptor *endpoint;
2951                         int buffer_size;
2952
2953                         endpoint = &serial->interface->altsetting[0].endpoint[i].desc;
2954                         buffer_size = le16_to_cpu(endpoint->wMaxPacketSize);
2955                         if (!interrupt_in_found &&
2956                             (usb_endpoint_is_int_in(endpoint))) {
2957                                 /* we found a interrupt in endpoint */
2958                                 dbg("found interrupt in");
2959
2960                                 /* not set up yet, so do it now */
2961                                 edge_serial->interrupt_read_urb = usb_alloc_urb(0, GFP_KERNEL);
2962                                 if (!edge_serial->interrupt_read_urb) {
2963                                         err("out of memory");
2964                                         return -ENOMEM;
2965                                 }
2966                                 edge_serial->interrupt_in_buffer = kmalloc(buffer_size, GFP_KERNEL);
2967                                 if (!edge_serial->interrupt_in_buffer) {
2968                                         err("out of memory");
2969                                         usb_free_urb(edge_serial->interrupt_read_urb);
2970                                         return -ENOMEM;
2971                                 }
2972                                 edge_serial->interrupt_in_endpoint = endpoint->bEndpointAddress;
2973
2974                                 /* set up our interrupt urb */
2975                                 usb_fill_int_urb(edge_serial->interrupt_read_urb,
2976                                                  dev,
2977                                                  usb_rcvintpipe(dev, endpoint->bEndpointAddress),
2978                                                  edge_serial->interrupt_in_buffer,
2979                                                  buffer_size,
2980                                                  edge_interrupt_callback,
2981                                                  edge_serial,
2982                                                  endpoint->bInterval);
2983
2984                                 interrupt_in_found = true;
2985                         }
2986
2987                         if (!bulk_in_found &&
2988                             (usb_endpoint_is_bulk_in(endpoint))) {
2989                                 /* we found a bulk in endpoint */
2990                                 dbg("found bulk in");
2991
2992                                 /* not set up yet, so do it now */
2993                                 edge_serial->read_urb = usb_alloc_urb(0, GFP_KERNEL);
2994                                 if (!edge_serial->read_urb) {
2995                                         err("out of memory");
2996                                         return -ENOMEM;
2997                                 }
2998                                 edge_serial->bulk_in_buffer = kmalloc(buffer_size, GFP_KERNEL);
2999                                 if (!edge_serial->bulk_in_buffer) {
3000                                         err ("out of memory");
3001                                         usb_free_urb(edge_serial->read_urb);
3002                                         return -ENOMEM;
3003                                 }
3004                                 edge_serial->bulk_in_endpoint = endpoint->bEndpointAddress;
3005
3006                                 /* set up our bulk in urb */
3007                                 usb_fill_bulk_urb(edge_serial->read_urb, dev,
3008                                                   usb_rcvbulkpipe(dev, endpoint->bEndpointAddress),
3009                                                   edge_serial->bulk_in_buffer,
3010                                                   endpoint->wMaxPacketSize,
3011                                                   edge_bulk_in_callback,
3012                                                   edge_serial);
3013                                 bulk_in_found = true;
3014                         }
3015
3016                         if (!bulk_out_found &&
3017                             (usb_endpoint_is_bulk_out(endpoint))) {
3018                                 /* we found a bulk out endpoint */
3019                                 dbg("found bulk out");
3020                                 edge_serial->bulk_out_endpoint = endpoint->bEndpointAddress;
3021                                 bulk_out_found = true;
3022                         }
3023                 }
3024
3025                 if (!interrupt_in_found || !bulk_in_found || !bulk_out_found) {
3026                         err ("Error - the proper endpoints were not found!");
3027                         return -ENODEV;
3028                 }
3029
3030                 /* start interrupt read for this edgeport this interrupt will
3031                  * continue as long as the edgeport is connected */
3032                 response = usb_submit_urb(edge_serial->interrupt_read_urb, GFP_KERNEL);
3033                 if (response)
3034                         err("%s - Error %d submitting control urb", __FUNCTION__, response);
3035         }
3036         return response;
3037 }
3038
3039
3040 /****************************************************************************
3041  * edge_shutdown
3042  *      This function is called whenever the device is removed from the usb bus.
3043  ****************************************************************************/
3044 static void edge_shutdown (struct usb_serial *serial)
3045 {
3046         struct edgeport_serial *edge_serial = usb_get_serial_data(serial);
3047         int i;
3048
3049         dbg("%s", __FUNCTION__);
3050
3051         /* stop reads and writes on all ports */
3052         for (i=0; i < serial->num_ports; ++i) {
3053                 kfree (usb_get_serial_port_data(serial->port[i]));
3054                 usb_set_serial_port_data(serial->port[i],  NULL);
3055         }
3056         /* free up our endpoint stuff */
3057         if (edge_serial->is_epic) {
3058                 usb_kill_urb(edge_serial->interrupt_read_urb);
3059                 usb_free_urb(edge_serial->interrupt_read_urb);
3060                 kfree(edge_serial->interrupt_in_buffer);
3061
3062                 usb_kill_urb(edge_serial->read_urb);
3063                 usb_free_urb(edge_serial->read_urb);
3064                 kfree(edge_serial->bulk_in_buffer);
3065         }
3066
3067         kfree(edge_serial);
3068         usb_set_serial_data(serial, NULL);
3069 }
3070
3071
3072 /****************************************************************************
3073  * edgeport_init
3074  *      This is called by the module subsystem, or on startup to initialize us
3075  ****************************************************************************/
3076 static int __init edgeport_init(void)
3077 {
3078         int retval;
3079
3080         retval = usb_serial_register(&edgeport_2port_device);
3081         if (retval)
3082                 goto failed_2port_device_register;
3083         retval = usb_serial_register(&edgeport_4port_device);
3084         if (retval)
3085                 goto failed_4port_device_register;
3086         retval = usb_serial_register(&edgeport_8port_device);
3087         if (retval)
3088                 goto failed_8port_device_register;
3089         retval = usb_serial_register(&epic_device);
3090         if (retval)
3091                 goto failed_epic_device_register;
3092         retval = usb_register(&io_driver);
3093         if (retval)
3094                 goto failed_usb_register;
3095         atomic_set(&CmdUrbs, 0);
3096         info(DRIVER_DESC " " DRIVER_VERSION);
3097         return 0;
3098
3099 failed_usb_register:
3100         usb_serial_deregister(&epic_device);
3101 failed_epic_device_register:
3102         usb_serial_deregister(&edgeport_8port_device);
3103 failed_8port_device_register:
3104         usb_serial_deregister(&edgeport_4port_device);
3105 failed_4port_device_register:
3106         usb_serial_deregister(&edgeport_2port_device);
3107 failed_2port_device_register:
3108         return retval;
3109 }
3110
3111
3112 /****************************************************************************
3113  * edgeport_exit
3114  *      Called when the driver is about to be unloaded.
3115  ****************************************************************************/
3116 static void __exit edgeport_exit (void)
3117 {
3118         usb_deregister (&io_driver);
3119         usb_serial_deregister (&edgeport_2port_device);
3120         usb_serial_deregister (&edgeport_4port_device);
3121         usb_serial_deregister (&edgeport_8port_device);
3122         usb_serial_deregister (&epic_device);
3123 }
3124
3125 module_init(edgeport_init);
3126 module_exit(edgeport_exit);
3127
3128 /* Module information */
3129 MODULE_AUTHOR( DRIVER_AUTHOR );
3130 MODULE_DESCRIPTION( DRIVER_DESC );
3131 MODULE_LICENSE("GPL");
3132
3133 module_param(debug, bool, S_IRUGO | S_IWUSR);
3134 MODULE_PARM_DESC(debug, "Debug enabled or not");
3135
3136 module_param(low_latency, bool, S_IRUGO | S_IWUSR);
3137 MODULE_PARM_DESC(low_latency, "Low latency enabled or not");