drivers/usb/serial/io_edgeport.c

   1 /*
   2  * Edgeport USB Serial Converter driver
   3  *
   4  * Copyright (C) 2000 Inside Out Networks, All rights reserved.
   5  * Copyright (C) 2001-2002 Greg Kroah-Hartman <greg@kroah.com>
   6  *
   7  *      This program is free software; you can redistribute it and/or modify
   8  *      it under the terms of the GNU General Public License as published by
   9  *      the Free Software Foundation; either version 2 of the License, or
  10  *      (at your option) any later version.
  11  *
  12  * Supports the following devices:
  13  *      Edgeport/4
  14  *      Edgeport/4t
  15  *      Edgeport/2
  16  *      Edgeport/4i
  17  *      Edgeport/2i
  18  *      Edgeport/421
  19  *      Edgeport/21
  20  *      Rapidport/4
  21  *      Edgeport/8
  22  *      Edgeport/2D8
  23  *      Edgeport/4D8
  24  *      Edgeport/8i
  25  *
  26  * For questions or problems with this driver, contact Inside Out
  27  * Networks technical support, or Peter Berger <pberger@brimson.com>,
  28  * or Al Borchers <alborchers@steinerpoint.com>.
  29  *
  30  */
  31
  32 #include <linux/kernel.h>
  33 #include <linux/jiffies.h>
  34 #include <linux/errno.h>
  35 #include <linux/init.h>
  36 #include <linux/slab.h>
  37 #include <linux/tty.h>
  38 #include <linux/tty_driver.h>
  39 #include <linux/tty_flip.h>
  40 #include <linux/module.h>
  41 #include <linux/spinlock.h>
  42 #include <linux/serial.h>
  43 #include <linux/ioctl.h>
  44 #include <linux/wait.h>
  45 #include <linux/firmware.h>
  46 #include <linux/ihex.h>
  47 #include <linux/uaccess.h>
  48 #include <linux/usb.h>
  49 #include <linux/usb/serial.h>
  50 #include "io_edgeport.h"
  51 #include "io_ionsp.h"           /* info for the iosp messages */
  52 #include "io_16654.h"           /* 16654 UART defines */
  53
  54 /*
  55  * Version Information
  56  */
  57 #define DRIVER_VERSION "v2.7"
  58 #define DRIVER_AUTHOR "Greg Kroah-Hartman <greg@kroah.com> and David Iacovelli"
  59 #define DRIVER_DESC "Edgeport USB Serial Driver"
  60
  61 #define MAX_NAME_LEN            64
  62
  63 #define CHASE_TIMEOUT           (5*HZ)          /* 5 seconds */
  64 #define OPEN_TIMEOUT            (5*HZ)          /* 5 seconds */
  65 #define COMMAND_TIMEOUT         (5*HZ)          /* 5 seconds */
  66
  67 /* receive port state */
  68 enum RXSTATE {
  69         EXPECT_HDR1 = 0,    /* Expect header byte 1 */
  70         EXPECT_HDR2 = 1,    /* Expect header byte 2 */
  71         EXPECT_DATA = 2,    /* Expect 'RxBytesRemaining' data */
  72         EXPECT_HDR3 = 3,    /* Expect header byte 3 (for status hdrs only) */
  73 };
  74
  75
  76 /* Transmit Fifo
  77  * This Transmit queue is an extension of the edgeport Rx buffer.
  78  * The maximum amount of data buffered in both the edgeport
  79  * Rx buffer (maxTxCredits) and this buffer will never exceed maxTxCredits.
  80  */
  81 struct TxFifo {
  82         unsigned int    head;   /* index to head pointer (write) */
  83         unsigned int    tail;   /* index to tail pointer (read)  */
  84         unsigned int    count;  /* Bytes in queue */
  85         unsigned int    size;   /* Max size of queue (equal to Max number of TxCredits) */
  86         unsigned char   *fifo;  /* allocated Buffer */
  87 };
  88
  89 /* This structure holds all of the local port information */
  90 struct edgeport_port {
  91         __u16                   txCredits;              /* our current credits for this port */
  92         __u16                   maxTxCredits;           /* the max size of the port */
  93
  94         struct TxFifo           txfifo;                 /* transmit fifo -- size will be maxTxCredits */
  95         struct urb              *write_urb;             /* write URB for this port */
  96         bool                    write_in_progress;      /* 'true' while a write URB is outstanding */
  97         spinlock_t              ep_lock;
  98
  99         __u8                    shadowLCR;              /* last LCR value received */
 100         __u8                    shadowMCR;              /* last MCR value received */
 101         __u8                    shadowMSR;              /* last MSR value received */
 102         __u8                    shadowLSR;              /* last LSR value received */
 103         __u8                    shadowXonChar;          /* last value set as XON char in Edgeport */
 104         __u8                    shadowXoffChar;         /* last value set as XOFF char in Edgeport */
 105         __u8                    validDataMask;
 106         __u32                   baudRate;
 107
 108         bool                    open;
 109         bool                    openPending;
 110         bool                    commandPending;
 111         bool                    closePending;
 112         bool                    chaseResponsePending;
 113
 114         wait_queue_head_t       wait_chase;             /* for handling sleeping while waiting for chase to finish */
 115         wait_queue_head_t       wait_open;              /* for handling sleeping while waiting for open to finish */
 116         wait_queue_head_t       wait_command;           /* for handling sleeping while waiting for command to finish */
 117         wait_queue_head_t       delta_msr_wait;         /* for handling sleeping while waiting for msr change to happen */
 118
 119         struct async_icount     icount;
 120         struct usb_serial_port  *port;                  /* loop back to the owner of this object */
 121 };
 122
 123
 124 /* This structure holds all of the individual device information */
 125 struct edgeport_serial {
 126         char                    name[MAX_NAME_LEN+2];           /* string name of this device */
 127
 128         struct edge_manuf_descriptor    manuf_descriptor;       /* the manufacturer descriptor */
 129         struct edge_boot_descriptor     boot_descriptor;        /* the boot firmware descriptor */
 130         struct edgeport_product_info    product_info;           /* Product Info */
 131         struct edge_compatibility_descriptor epic_descriptor;   /* Edgeport compatible descriptor */
 132         int                     is_epic;                        /* flag if EPiC device or not */
 133
 134         __u8                    interrupt_in_endpoint;          /* the interrupt endpoint handle */
 135         unsigned char           *interrupt_in_buffer;           /* the buffer we use for the interrupt endpoint */
 136         struct urb              *interrupt_read_urb;            /* our interrupt urb */
 137
 138         __u8                    bulk_in_endpoint;               /* the bulk in endpoint handle */
 139         unsigned char           *bulk_in_buffer;                /* the buffer we use for the bulk in endpoint */
 140         struct urb              *read_urb;                      /* our bulk read urb */
 141         bool                    read_in_progress;
 142         spinlock_t              es_lock;
 143
 144         __u8                    bulk_out_endpoint;              /* the bulk out endpoint handle */
 145
 146         __s16                   rxBytesAvail;                   /* the number of bytes that we need to read from this device */
 147
 148         enum RXSTATE            rxState;                        /* the current state of the bulk receive processor */
 149         __u8                    rxHeader1;                      /* receive header byte 1 */
 150         __u8                    rxHeader2;                      /* receive header byte 2 */
 151         __u8                    rxHeader3;                      /* receive header byte 3 */
 152         __u8                    rxPort;                         /* the port that we are currently receiving data for */
 153         __u8                    rxStatusCode;                   /* the receive status code */
 154         __u8                    rxStatusParam;                  /* the receive status paramater */
 155         __s16                   rxBytesRemaining;               /* the number of port bytes left to read */
 156         struct usb_serial       *serial;                        /* loop back to the owner of this object */
 157 };
 158
 159 /* baud rate information */
 160 struct divisor_table_entry {
 161         __u32   BaudRate;
 162         __u16  Divisor;
 163 };
 164
 165 /*
 166  * Define table of divisors for Rev A EdgePort/4 hardware
 167  * These assume a 3.6864MHz crystal, the standard /16, and
 168  * MCR.7 = 0.
 169  */
 170
 171 static const struct divisor_table_entry divisor_table[] = {
 172         {   50,         4608},
 173         {   75,         3072},
 174         {   110,        2095},  /* 2094.545455 => 230450   => .0217 % over */
 175         {   134,        1713},  /* 1713.011152 => 230398.5 => .00065% under */
 176         {   150,        1536},
 177         {   300,        768},
 178         {   600,        384},
 179         {   1200,       192},
 180         {   1800,       128},
 181         {   2400,       96},
 182         {   4800,       48},
 183         {   7200,       32},
 184         {   9600,       24},
 185         {   14400,      16},
 186         {   19200,      12},
 187         {   38400,      6},
 188         {   57600,      4},
 189         {   115200,     2},
 190         {   230400,     1},
 191 };
 192
 193 /* local variables */
 194 static bool debug;
 195
 196 /* Number of outstanding Command Write Urbs */
 197 static atomic_t CmdUrbs = ATOMIC_INIT(0);
 198
 199
 200 /* local function prototypes */
 201
 202 /* function prototypes for all URB callbacks */
 203 static void edge_interrupt_callback(struct urb *urb);
 204 static void edge_bulk_in_callback(struct urb *urb);
 205 static void edge_bulk_out_data_callback(struct urb *urb);
 206 static void edge_bulk_out_cmd_callback(struct urb *urb);
 207
 208 /* function prototypes for the usbserial callbacks */
 209 static int edge_open(struct tty_struct *tty, struct usb_serial_port *port);
 210 static void edge_close(struct usb_serial_port *port);
 211 static int edge_write(struct tty_struct *tty, struct usb_serial_port *port,
 212                                         const unsigned char *buf, int count);
 213 static int edge_write_room(struct tty_struct *tty);
 214 static int edge_chars_in_buffer(struct tty_struct *tty);
 215 static void edge_throttle(struct tty_struct *tty);
 216 static void edge_unthrottle(struct tty_struct *tty);
 217 static void edge_set_termios(struct tty_struct *tty,
 218                                         struct usb_serial_port *port,
 219                                         struct ktermios *old_termios);
 220 static int  edge_ioctl(struct tty_struct *tty,
 221                                         unsigned int cmd, unsigned long arg);
 222 static void edge_break(struct tty_struct *tty, int break_state);
 223 static int  edge_tiocmget(struct tty_struct *tty);
 224 static int  edge_tiocmset(struct tty_struct *tty,
 225                                         unsigned int set, unsigned int clear);
 226 static int  edge_get_icount(struct tty_struct *tty,
 227                                 struct serial_icounter_struct *icount);
 228 static int  edge_startup(struct usb_serial *serial);
 229 static void edge_disconnect(struct usb_serial *serial);
 230 static void edge_release(struct usb_serial *serial);
 231
 232 #include "io_tables.h"  /* all of the devices that this driver supports */
 233
 234 /* function prototypes for all of our local functions */
 235
 236 static void  process_rcvd_data(struct edgeport_serial *edge_serial,
 237                                 unsigned char *buffer, __u16 bufferLength);
 238 static void process_rcvd_status(struct edgeport_serial *edge_serial,
 239                                 __u8 byte2, __u8 byte3);
 240 static void edge_tty_recv(struct device *dev, struct tty_struct *tty,
 241                                 unsigned char *data, int length);
 242 static void handle_new_msr(struct edgeport_port *edge_port, __u8 newMsr);
 243 static void handle_new_lsr(struct edgeport_port *edge_port, __u8 lsrData,
 244                                 __u8 lsr, __u8 data);
 245 static int  send_iosp_ext_cmd(struct edgeport_port *edge_port, __u8 command,
 246                                 __u8 param);
 247 static int  calc_baud_rate_divisor(int baud_rate, int *divisor);
 248 static int  send_cmd_write_baud_rate(struct edgeport_port *edge_port,
 249                                 int baudRate);
 250 static void change_port_settings(struct tty_struct *tty,
 251                                 struct edgeport_port *edge_port,
 252                                 struct ktermios *old_termios);
 253 static int  send_cmd_write_uart_register(struct edgeport_port *edge_port,
 254                                 __u8 regNum, __u8 regValue);
 255 static int  write_cmd_usb(struct edgeport_port *edge_port,
 256                                 unsigned char *buffer, int writeLength);
 257 static void send_more_port_data(struct edgeport_serial *edge_serial,
 258                                 struct edgeport_port *edge_port);
 259
 260 static int sram_write(struct usb_serial *serial, __u16 extAddr, __u16 addr,
 261                                         __u16 length, const __u8 *data);
 262 static int rom_read(struct usb_serial *serial, __u16 extAddr, __u16 addr,
 263                                                 __u16 length, __u8 *data);
 264 static int rom_write(struct usb_serial *serial, __u16 extAddr, __u16 addr,
 265                                         __u16 length, const __u8 *data);
 266 static void get_manufacturing_desc(struct edgeport_serial *edge_serial);
 267 static void get_boot_desc(struct edgeport_serial *edge_serial);
 268 static void load_application_firmware(struct edgeport_serial *edge_serial);
 269
 270 static void unicode_to_ascii(char *string, int buflen,
 271                                 __le16 *unicode, int unicode_size);
 272
 273
 274 /* ************************************************************************ */
 275 /* ************************************************************************ */
 276 /* ************************************************************************ */
 277 /* ************************************************************************ */
 278
 279 /************************************************************************
 280  *                                                                      *
 281  * update_edgeport_E2PROM()     Compare current versions of             *
 282  *                              Boot ROM and Manufacture                *
 283  *                              Descriptors with versions               *
 284  *                              embedded in this driver                 *
 285  *                                                                      *
 286  ************************************************************************/
 287 static void update_edgeport_E2PROM(struct edgeport_serial *edge_serial)
 288 {
 289         __u32 BootCurVer;
 290         __u32 BootNewVer;
 291         __u8 BootMajorVersion;
 292         __u8 BootMinorVersion;
 293         __u16 BootBuildNumber;
 294         __u32 Bootaddr;
 295         const struct ihex_binrec *rec;
 296         const struct firmware *fw;
 297         const char *fw_name;
 298         int response;
 299
 300         switch (edge_serial->product_info.iDownloadFile) {
 301         case EDGE_DOWNLOAD_FILE_I930:
 302                 fw_name = "edgeport/boot.fw";
 303                 break;
 304         case EDGE_DOWNLOAD_FILE_80251:
 305                 fw_name = "edgeport/boot2.fw";
 306                 break;
 307         default:
 308                 return;
 309         }
 310
 311         response = request_ihex_firmware(&fw, fw_name,
 312                                          &edge_serial->serial->dev->dev);
 313         if (response) {
 314                 printk(KERN_ERR "Failed to load image \"%s\" err %d\n",
 315                        fw_name, response);
 316                 return;
 317         }
 318
 319         rec = (const struct ihex_binrec *)fw->data;
 320         BootMajorVersion = rec->data[0];
 321         BootMinorVersion = rec->data[1];
 322         BootBuildNumber = (rec->data[2] << 8) | rec->data[3];
 323
 324         /* Check Boot Image Version */
 325         BootCurVer = (edge_serial->boot_descriptor.MajorVersion << 24) +
 326                      (edge_serial->boot_descriptor.MinorVersion << 16) +
 327                       le16_to_cpu(edge_serial->boot_descriptor.BuildNumber);
 328
 329         BootNewVer = (BootMajorVersion << 24) +
 330                      (BootMinorVersion << 16) +
 331                       BootBuildNumber;
 332
 333         dbg("Current Boot Image version %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
 338
 339         if (BootNewVer > BootCurVer) {
 340                 dbg("**Update Boot Image from %d.%d.%d to %d.%d.%d",
 341                     edge_serial->boot_descriptor.MajorVersion,
 342                     edge_serial->boot_descriptor.MinorVersion,
 343                     le16_to_cpu(edge_serial->boot_descriptor.BuildNumber),
 344                     BootMajorVersion, BootMinorVersion, BootBuildNumber);
 345
 346                 dbg("Downloading new Boot Image");
 347
 348                 for (rec = ihex_next_binrec(rec); rec;
 349                      rec = ihex_next_binrec(rec)) {
 350                         Bootaddr = be32_to_cpu(rec->addr);
 351                         response = rom_write(edge_serial->serial,
 352                                              Bootaddr >> 16,
 353                                              Bootaddr & 0xFFFF,
 354                                              be16_to_cpu(rec->len),
 355                                              &rec->data[0]);
 356                         if (response < 0) {
 357                                 dev_err(&edge_serial->serial->dev->dev,
 358                                         "rom_write failed (%x, %x, %d)\n",
 359                                         Bootaddr >> 16, Bootaddr & 0xFFFF,
 360                                         be16_to_cpu(rec->len));
 361                                 break;
 362                         }
 363                 }
 364         } else {
 365                 dbg("Boot Image -- already up to date");
 366         }
 367         release_firmware(fw);
 368 }
 369
 370 #if 0
 371 /************************************************************************
 372  *
 373  *  Get string descriptor from device
 374  *
 375  ************************************************************************/
 376 static int get_string_desc(struct usb_device *dev, int Id,
 377                                 struct usb_string_descriptor **pRetDesc)
 378 {
 379         struct usb_string_descriptor StringDesc;
 380         struct usb_string_descriptor *pStringDesc;
 381
 382         dbg("%s - USB String ID = %d", __func__, Id);
 383
 384         if (!usb_get_descriptor(dev, USB_DT_STRING, Id, &StringDesc,
 385                                                 sizeof(StringDesc)))
 386                 return 0;
 387
 388         pStringDesc = kmalloc(StringDesc.bLength, GFP_KERNEL);
 389         if (!pStringDesc)
 390                 return -1;
 391
 392         if (!usb_get_descriptor(dev, USB_DT_STRING, Id, pStringDesc,
 393                                                         StringDesc.bLength)) {
 394                 kfree(pStringDesc);
 395                 return -1;
 396         }
 397
 398         *pRetDesc = pStringDesc;
 399         return 0;
 400 }
 401 #endif
 402
 403 static void dump_product_info(struct edgeport_product_info *product_info)
 404 {
 405         /* Dump Product Info structure */
 406         dbg("**Product Information:");
 407         dbg("  ProductId             %x", product_info->ProductId);
 408         dbg("  NumPorts              %d", product_info->NumPorts);
 409         dbg("  ProdInfoVer           %d", product_info->ProdInfoVer);
 410         dbg("  IsServer              %d", product_info->IsServer);
 411         dbg("  IsRS232               %d", product_info->IsRS232);
 412         dbg("  IsRS422               %d", product_info->IsRS422);
 413         dbg("  IsRS485               %d", product_info->IsRS485);
 414         dbg("  RomSize               %d", product_info->RomSize);
 415         dbg("  RamSize               %d", product_info->RamSize);
 416         dbg("  CpuRev                %x", product_info->CpuRev);
 417         dbg("  BoardRev              %x", product_info->BoardRev);
 418         dbg("  BootMajorVersion      %d.%d.%d", product_info->BootMajorVersion,
 419             product_info->BootMinorVersion,
 420             le16_to_cpu(product_info->BootBuildNumber));
 421         dbg("  FirmwareMajorVersion  %d.%d.%d",
 422                         product_info->FirmwareMajorVersion,
 423                         product_info->FirmwareMinorVersion,
 424                         le16_to_cpu(product_info->FirmwareBuildNumber));
 425         dbg("  ManufactureDescDate   %d/%d/%d",
 426                         product_info->ManufactureDescDate[0],
 427                         product_info->ManufactureDescDate[1],
 428                         product_info->ManufactureDescDate[2]+1900);
 429         dbg("  iDownloadFile         0x%x", product_info->iDownloadFile);
 430         dbg("  EpicVer               %d", product_info->EpicVer);
 431 }
 432
 433 static void get_product_info(struct edgeport_serial *edge_serial)
 434 {
 435         struct edgeport_product_info *product_info = &edge_serial->product_info;
 436
 437         memset(product_info, 0, sizeof(struct edgeport_product_info));
 438
 439         product_info->ProductId = (__u16)(le16_to_cpu(edge_serial->serial->dev->descriptor.idProduct) & ~ION_DEVICE_ID_80251_NETCHIP);
 440         product_info->NumPorts = edge_serial->manuf_descriptor.NumPorts;
 441         product_info->ProdInfoVer = 0;
 442
 443         product_info->RomSize = edge_serial->manuf_descriptor.RomSize;
 444         product_info->RamSize = edge_serial->manuf_descriptor.RamSize;
 445         product_info->CpuRev = edge_serial->manuf_descriptor.CpuRev;
 446         product_info->BoardRev = edge_serial->manuf_descriptor.BoardRev;
 447
 448         product_info->BootMajorVersion =
 449                                 edge_serial->boot_descriptor.MajorVersion;
 450         product_info->BootMinorVersion =
 451                                 edge_serial->boot_descriptor.MinorVersion;
 452         product_info->BootBuildNumber =
 453                                 edge_serial->boot_descriptor.BuildNumber;
 454
 455         memcpy(product_info->ManufactureDescDate,
 456                         edge_serial->manuf_descriptor.DescDate,
 457                         sizeof(edge_serial->manuf_descriptor.DescDate));
 458
 459         /* check if this is 2nd generation hardware */
 460         if (le16_to_cpu(edge_serial->serial->dev->descriptor.idProduct)
 461                                             & ION_DEVICE_ID_80251_NETCHIP)
 462                 product_info->iDownloadFile = EDGE_DOWNLOAD_FILE_80251;
 463         else
 464                 product_info->iDownloadFile = EDGE_DOWNLOAD_FILE_I930;
 465
 466         /* Determine Product type and set appropriate flags */
 467         switch (DEVICE_ID_FROM_USB_PRODUCT_ID(product_info->ProductId)) {
 468         case ION_DEVICE_ID_EDGEPORT_COMPATIBLE:
 469         case ION_DEVICE_ID_EDGEPORT_4T:
 470         case ION_DEVICE_ID_EDGEPORT_4:
 471         case ION_DEVICE_ID_EDGEPORT_2:
 472         case ION_DEVICE_ID_EDGEPORT_8_DUAL_CPU:
 473         case ION_DEVICE_ID_EDGEPORT_8:
 474         case ION_DEVICE_ID_EDGEPORT_421:
 475         case ION_DEVICE_ID_EDGEPORT_21:
 476         case ION_DEVICE_ID_EDGEPORT_2_DIN:
 477         case ION_DEVICE_ID_EDGEPORT_4_DIN:
 478         case ION_DEVICE_ID_EDGEPORT_16_DUAL_CPU:
 479                 product_info->IsRS232 = 1;
 480                 break;
 481
 482         case ION_DEVICE_ID_EDGEPORT_2I: /* Edgeport/2 RS422/RS485 */
 483                 product_info->IsRS422 = 1;
 484                 product_info->IsRS485 = 1;
 485                 break;
 486
 487         case ION_DEVICE_ID_EDGEPORT_8I: /* Edgeport/4 RS422 */
 488         case ION_DEVICE_ID_EDGEPORT_4I: /* Edgeport/4 RS422 */
 489                 product_info->IsRS422 = 1;
 490                 break;
 491         }
 492
 493         dump_product_info(product_info);
 494 }
 495
 496 static int get_epic_descriptor(struct edgeport_serial *ep)
 497 {
 498         int result;
 499         struct usb_serial *serial = ep->serial;
 500         struct edgeport_product_info *product_info = &ep->product_info;
 501         struct edge_compatibility_descriptor *epic = &ep->epic_descriptor;
 502         struct edge_compatibility_bits *bits;
 503
 504         ep->is_epic = 0;
 505         result = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
 506                                  USB_REQUEST_ION_GET_EPIC_DESC,
 507                                  0xC0, 0x00, 0x00,
 508                                  &ep->epic_descriptor,
 509                                  sizeof(struct edge_compatibility_descriptor),
 510                                  300);
 511
 512         dbg("%s result = %d", __func__, result);
 513
 514         if (result > 0) {
 515                 ep->is_epic = 1;
 516                 memset(product_info, 0, sizeof(struct edgeport_product_info));
 517
 518                 product_info->NumPorts = epic->NumPorts;
 519                 product_info->ProdInfoVer = 0;
 520                 product_info->FirmwareMajorVersion = epic->MajorVersion;
 521                 product_info->FirmwareMinorVersion = epic->MinorVersion;
 522                 product_info->FirmwareBuildNumber = epic->BuildNumber;
 523                 product_info->iDownloadFile = epic->iDownloadFile;
 524                 product_info->EpicVer = epic->EpicVer;
 525                 product_info->Epic = epic->Supports;
 526                 product_info->ProductId = ION_DEVICE_ID_EDGEPORT_COMPATIBLE;
 527                 dump_product_info(product_info);
 528
 529                 bits = &ep->epic_descriptor.Supports;
 530                 dbg("**EPIC descriptor:");
 531                 dbg("  VendEnableSuspend: %s", bits->VendEnableSuspend  ? "TRUE": "FALSE");
 532                 dbg("  IOSPOpen         : %s", bits->IOSPOpen           ? "TRUE": "FALSE");
 533                 dbg("  IOSPClose        : %s", bits->IOSPClose          ? "TRUE": "FALSE");
 534                 dbg("  IOSPChase        : %s", bits->IOSPChase          ? "TRUE": "FALSE");
 535                 dbg("  IOSPSetRxFlow    : %s", bits->IOSPSetRxFlow      ? "TRUE": "FALSE");
 536                 dbg("  IOSPSetTxFlow    : %s", bits->IOSPSetTxFlow      ? "TRUE": "FALSE");
 537                 dbg("  IOSPSetXChar     : %s", bits->IOSPSetXChar       ? "TRUE": "FALSE");
 538                 dbg("  IOSPRxCheck      : %s", bits->IOSPRxCheck        ? "TRUE": "FALSE");
 539                 dbg("  IOSPSetClrBreak  : %s", bits->IOSPSetClrBreak    ? "TRUE": "FALSE");
 540                 dbg("  IOSPWriteMCR     : %s", bits->IOSPWriteMCR       ? "TRUE": "FALSE");
 541                 dbg("  IOSPWriteLCR     : %s", bits->IOSPWriteLCR       ? "TRUE": "FALSE");
 542                 dbg("  IOSPSetBaudRate  : %s", bits->IOSPSetBaudRate    ? "TRUE": "FALSE");
 543                 dbg("  TrueEdgeport     : %s", bits->TrueEdgeport       ? "TRUE": "FALSE");
 544         }
 545
 546         return result;
 547 }
 548
 549
 550 /************************************************************************/
 551 /************************************************************************/
 552 /*            U S B  C A L L B A C K   F U N C T I O N S                */
 553 /*            U S B  C A L L B A C K   F U N C T I O N S                */
 554 /************************************************************************/
 555 /************************************************************************/
 556
 557 /*****************************************************************************
 558  * edge_interrupt_callback
 559  *      this is the callback function for when we have received data on the
 560  *      interrupt endpoint.
 561  *****************************************************************************/
 562 static void edge_interrupt_callback(struct urb *urb)
 563 {
 564         struct edgeport_serial  *edge_serial = urb->context;
 565         struct edgeport_port *edge_port;
 566         struct usb_serial_port *port;
 567         struct tty_struct *tty;
 568         unsigned char *data = urb->transfer_buffer;
 569         int length = urb->actual_length;
 570         int bytes_avail;
 571         int position;
 572         int txCredits;
 573         int portNumber;
 574         int result;
 575         int status = urb->status;
 576
 577         dbg("%s", __func__);
 578
 579         switch (status) {
 580         case 0:
 581                 /* success */
 582                 break;
 583         case -ECONNRESET:
 584         case -ENOENT:
 585         case -ESHUTDOWN:
 586                 /* this urb is terminated, clean up */
 587                 dbg("%s - urb shutting down with status: %d",
 588                                                 __func__, status);
 589                 return;
 590         default:
 591                 dbg("%s - nonzero urb status received: %d", __func__, status);
 592                 goto exit;
 593         }
 594
 595         /* process this interrupt-read even if there are no ports open */
 596         if (length) {
 597                 usb_serial_debug_data(debug, &edge_serial->serial->dev->dev,
 598                                                 __func__, length, data);
 599
 600                 if (length > 1) {
 601                         bytes_avail = data[0] | (data[1] << 8);
 602                         if (bytes_avail) {
 603                                 spin_lock(&edge_serial->es_lock);
 604                                 edge_serial->rxBytesAvail += bytes_avail;
 605                                 dbg("%s - bytes_avail=%d, rxBytesAvail=%d, read_in_progress=%d", __func__, bytes_avail, edge_serial->rxBytesAvail, edge_serial->read_in_progress);
 606
 607                                 if (edge_serial->rxBytesAvail > 0 &&
 608                                     !edge_serial->read_in_progress) {
 609                                         dbg("%s - posting a read", __func__);
 610                                         edge_serial->read_in_progress = true;
 611
 612                                         /* we have pending bytes on the
 613                                            bulk in pipe, send a request */
 614                                         result = usb_submit_urb(edge_serial->read_urb, GFP_ATOMIC);
 615                                         if (result) {
 616                                                 dev_err(&edge_serial->serial->dev->dev, "%s - usb_submit_urb(read bulk) failed with result = %d\n", __func__, result);
 617                                                 edge_serial->read_in_progress = false;
 618                                         }
 619                                 }
 620                                 spin_unlock(&edge_serial->es_lock);
 621                         }
 622                 }
 623                 /* grab the txcredits for the ports if available */
 624                 position = 2;
 625                 portNumber = 0;
 626                 while ((position < length) &&
 627                                 (portNumber < edge_serial->serial->num_ports)) {
 628                         txCredits = data[position] | (data[position+1] << 8);
 629                         if (txCredits) {
 630                                 port = edge_serial->serial->port[portNumber];
 631                                 edge_port = usb_get_serial_port_data(port);
 632                                 if (edge_port->open) {
 633                                         spin_lock(&edge_port->ep_lock);
 634                                         edge_port->txCredits += txCredits;
 635                                         spin_unlock(&edge_port->ep_lock);
 636                                         dbg("%s - txcredits for port%d = %d",
 637                                                         __func__, portNumber,
 638                                                         edge_port->txCredits);
 639
 640                                         /* tell the tty driver that something
 641                                            has changed */
 642                                         tty = tty_port_tty_get(
 643                                                 &edge_port->port->port);
 644                                         if (tty) {
 645                                                 tty_wakeup(tty);
 646                                                 tty_kref_put(tty);
 647                                         }
 648                                         /* Since we have more credit, check
 649                                            if more data can be sent */
 650                                         send_more_port_data(edge_serial,
 651                                                                 edge_port);
 652                                 }
 653                         }
 654                         position += 2;
 655                         ++portNumber;
 656                 }
 657         }
 658
 659 exit:
 660         result = usb_submit_urb(urb, GFP_ATOMIC);
 661         if (result)
 662                 dev_err(&urb->dev->dev,
 663                         "%s - Error %d submitting control urb\n",
 664                                                 __func__, result);
 665 }
 666
 667
 668 /*****************************************************************************
 669  * edge_bulk_in_callback
 670  *      this is the callback function for when we have received data on the
 671  *      bulk in endpoint.
 672  *****************************************************************************/
 673 static void edge_bulk_in_callback(struct urb *urb)
 674 {
 675         struct edgeport_serial  *edge_serial = urb->context;
 676         unsigned char           *data = urb->transfer_buffer;
 677         int                     retval;
 678         __u16                   raw_data_length;
 679         int status = urb->status;
 680
 681         dbg("%s", __func__);
 682
 683         if (status) {
 684                 dbg("%s - nonzero read bulk status received: %d",
 685                     __func__, status);
 686                 edge_serial->read_in_progress = false;
 687                 return;
 688         }
 689
 690         if (urb->actual_length == 0) {
 691                 dbg("%s - read bulk callback with no data", __func__);
 692                 edge_serial->read_in_progress = false;
 693                 return;
 694         }
 695
 696         raw_data_length = urb->actual_length;
 697
 698         usb_serial_debug_data(debug, &edge_serial->serial->dev->dev,
 699                                         __func__, raw_data_length, data);
 700
 701         spin_lock(&edge_serial->es_lock);
 702
 703         /* decrement our rxBytes available by the number that we just got */
 704         edge_serial->rxBytesAvail -= raw_data_length;
 705
 706         dbg("%s - Received = %d, rxBytesAvail %d", __func__,
 707                                 raw_data_length, edge_serial->rxBytesAvail);
 708
 709         process_rcvd_data(edge_serial, data, urb->actual_length);
 710
 711         /* check to see if there's any more data for us to read */
 712         if (edge_serial->rxBytesAvail > 0) {
 713                 dbg("%s - posting a read", __func__);
 714                 retval = usb_submit_urb(edge_serial->read_urb, GFP_ATOMIC);
 715                 if (retval) {
 716                         dev_err(&urb->dev->dev,
 717                                 "%s - usb_submit_urb(read bulk) failed, "
 718                                 "retval = %d\n", __func__, retval);
 719                         edge_serial->read_in_progress = false;
 720                 }
 721         } else {
 722                 edge_serial->read_in_progress = false;
 723         }
 724
 725         spin_unlock(&edge_serial->es_lock);
 726 }
 727
 728
 729 /*****************************************************************************
 730  * edge_bulk_out_data_callback
 731  *      this is the callback function for when we have finished sending
 732  *      serial data on the bulk out endpoint.
 733  *****************************************************************************/
 734 static void edge_bulk_out_data_callback(struct urb *urb)
 735 {
 736         struct edgeport_port *edge_port = urb->context;
 737         struct tty_struct *tty;
 738         int status = urb->status;
 739
 740         dbg("%s", __func__);
 741
 742         if (status) {
 743                 dbg("%s - nonzero write bulk status received: %d",
 744                     __func__, status);
 745         }
 746
 747         tty = tty_port_tty_get(&edge_port->port->port);
 748
 749         if (tty && edge_port->open) {
 750                 /* let the tty driver wakeup if it has a special
 751                    write_wakeup function */
 752                 tty_wakeup(tty);
 753         }
 754         tty_kref_put(tty);
 755
 756         /* Release the Write URB */
 757         edge_port->write_in_progress = false;
 758
 759         /* Check if more data needs to be sent */
 760         send_more_port_data((struct edgeport_serial *)
 761                 (usb_get_serial_data(edge_port->port->serial)), edge_port);
 762 }
 763
 764
 765 /*****************************************************************************
 766  * BulkOutCmdCallback
 767  *      this is the callback function for when we have finished sending a
 768  *      command on the bulk out endpoint.
 769  *****************************************************************************/
 770 static void edge_bulk_out_cmd_callback(struct urb *urb)
 771 {
 772         struct edgeport_port *edge_port = urb->context;
 773         struct tty_struct *tty;
 774         int status = urb->status;
 775
 776         dbg("%s", __func__);
 777
 778         atomic_dec(&CmdUrbs);
 779         dbg("%s - FREE URB %p (outstanding %d)", __func__,
 780                                         urb, atomic_read(&CmdUrbs));
 781
 782
 783         /* clean up the transfer buffer */
 784         kfree(urb->transfer_buffer);
 785
 786         /* Free the command urb */
 787         usb_free_urb(urb);
 788
 789         if (status) {
 790                 dbg("%s - nonzero write bulk status received: %d",
 791                                                         __func__, status);
 792                 return;
 793         }
 794
 795         /* Get pointer to tty */
 796         tty = tty_port_tty_get(&edge_port->port->port);
 797
 798         /* tell the tty driver that something has changed */
 799         if (tty && edge_port->open)
 800                 tty_wakeup(tty);
 801         tty_kref_put(tty);
 802
 803         /* we have completed the command */
 804         edge_port->commandPending = false;
 805         wake_up(&edge_port->wait_command);
 806 }
 807
 808
 809 /*****************************************************************************
 810  * Driver tty interface functions
 811  *****************************************************************************/
 812
 813 /*****************************************************************************
 814  * SerialOpen
 815  *      this function is called by the tty driver when a port is opened
 816  *      If successful, we return 0
 817  *      Otherwise we return a negative error number.
 818  *****************************************************************************/
 819 static int edge_open(struct tty_struct *tty, struct usb_serial_port *port)
 820 {
 821         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
 822         struct usb_serial *serial;
 823         struct edgeport_serial *edge_serial;
 824         int response;
 825
 826         dbg("%s - port %d", __func__, port->number);
 827
 828         if (edge_port == NULL)
 829                 return -ENODEV;
 830
 831         /* see if we've set up our endpoint info yet (can't set it up
 832            in edge_startup as the structures were not set up at that time.) */
 833         serial = port->serial;
 834         edge_serial = usb_get_serial_data(serial);
 835         if (edge_serial == NULL)
 836                 return -ENODEV;
 837         if (edge_serial->interrupt_in_buffer == NULL) {
 838                 struct usb_serial_port *port0 = serial->port[0];
 839
 840                 /* not set up yet, so do it now */
 841                 edge_serial->interrupt_in_buffer =
 842                                         port0->interrupt_in_buffer;
 843                 edge_serial->interrupt_in_endpoint =
 844                                         port0->interrupt_in_endpointAddress;
 845                 edge_serial->interrupt_read_urb = port0->interrupt_in_urb;
 846                 edge_serial->bulk_in_buffer = port0->bulk_in_buffer;
 847                 edge_serial->bulk_in_endpoint =
 848                                         port0->bulk_in_endpointAddress;
 849                 edge_serial->read_urb = port0->read_urb;
 850                 edge_serial->bulk_out_endpoint =
 851                                         port0->bulk_out_endpointAddress;
 852
 853                 /* set up our interrupt urb */
 854                 usb_fill_int_urb(edge_serial->interrupt_read_urb,
 855                       serial->dev,
 856                       usb_rcvintpipe(serial->dev,
 857                                 port0->interrupt_in_endpointAddress),
 858                       port0->interrupt_in_buffer,
 859                       edge_serial->interrupt_read_urb->transfer_buffer_length,
 860                       edge_interrupt_callback, edge_serial,
 861                       edge_serial->interrupt_read_urb->interval);
 862
 863                 /* set up our bulk in urb */
 864                 usb_fill_bulk_urb(edge_serial->read_urb, serial->dev,
 865                         usb_rcvbulkpipe(serial->dev,
 866                                 port0->bulk_in_endpointAddress),
 867                         port0->bulk_in_buffer,
 868                         edge_serial->read_urb->transfer_buffer_length,
 869                         edge_bulk_in_callback, edge_serial);
 870                 edge_serial->read_in_progress = false;
 871
 872                 /* start interrupt read for this edgeport
 873                  * this interrupt will continue as long
 874                  * as the edgeport is connected */
 875                 response = usb_submit_urb(edge_serial->interrupt_read_urb,
 876                                                                 GFP_KERNEL);
 877                 if (response) {
 878                         dev_err(&port->dev,
 879                                 "%s - Error %d submitting control urb\n",
 880                                                         __func__, response);
 881                 }
 882         }
 883
 884         /* initialize our wait queues */
 885         init_waitqueue_head(&edge_port->wait_open);
 886         init_waitqueue_head(&edge_port->wait_chase);
 887         init_waitqueue_head(&edge_port->delta_msr_wait);
 888         init_waitqueue_head(&edge_port->wait_command);
 889
 890         /* initialize our icount structure */
 891         memset(&(edge_port->icount), 0x00, sizeof(edge_port->icount));
 892
 893         /* initialize our port settings */
 894         edge_port->txCredits = 0;       /* Can't send any data yet */
 895         /* Must always set this bit to enable ints! */
 896         edge_port->shadowMCR = MCR_MASTER_IE;
 897         edge_port->chaseResponsePending = false;
 898
 899         /* send a open port command */
 900         edge_port->openPending = true;
 901         edge_port->open        = false;
 902         response = send_iosp_ext_cmd(edge_port, IOSP_CMD_OPEN_PORT, 0);
 903
 904         if (response < 0) {
 905                 dev_err(&port->dev, "%s - error sending open port command\n",
 906                                                                 __func__);
 907                 edge_port->openPending = false;
 908                 return -ENODEV;
 909         }
 910
 911         /* now wait for the port to be completely opened */
 912         wait_event_timeout(edge_port->wait_open, !edge_port->openPending,
 913                                                                 OPEN_TIMEOUT);
 914
 915         if (!edge_port->open) {
 916                 /* open timed out */
 917                 dbg("%s - open timedout", __func__);
 918                 edge_port->openPending = false;
 919                 return -ENODEV;
 920         }
 921
 922         /* create the txfifo */
 923         edge_port->txfifo.head  = 0;
 924         edge_port->txfifo.tail  = 0;
 925         edge_port->txfifo.count = 0;
 926         edge_port->txfifo.size  = edge_port->maxTxCredits;
 927         edge_port->txfifo.fifo  = kmalloc(edge_port->maxTxCredits, GFP_KERNEL);
 928
 929         if (!edge_port->txfifo.fifo) {
 930                 dbg("%s - no memory", __func__);
 931                 edge_close(port);
 932                 return -ENOMEM;
 933         }
 934
 935         /* Allocate a URB for the write */
 936         edge_port->write_urb = usb_alloc_urb(0, GFP_KERNEL);
 937         edge_port->write_in_progress = false;
 938
 939         if (!edge_port->write_urb) {
 940                 dbg("%s - no memory", __func__);
 941                 edge_close(port);
 942                 return -ENOMEM;
 943         }
 944
 945         dbg("%s(%d) - Initialize TX fifo to %d bytes",
 946                         __func__, port->number, edge_port->maxTxCredits);
 947
 948         dbg("%s exited", __func__);
 949
 950         return 0;
 951 }
 952
 953
 954 /************************************************************************
 955  *
 956  * block_until_chase_response
 957  *
 958  *      This function will block the close until one of the following:
 959  *              1. Response to our Chase comes from Edgeport
 960  *              2. A timeout of 10 seconds without activity has expired
 961  *                 (1K of Edgeport data @ 2400 baud ==> 4 sec to empty)
 962  *
 963  ************************************************************************/
 964 static void block_until_chase_response(struct edgeport_port *edge_port)
 965 {
 966         DEFINE_WAIT(wait);
 967         __u16 lastCredits;
 968         int timeout = 1*HZ;
 969         int loop = 10;
 970
 971         while (1) {
 972                 /* Save Last credits */
 973                 lastCredits = edge_port->txCredits;
 974
 975                 /* Did we get our Chase response */
 976                 if (!edge_port->chaseResponsePending) {
 977                         dbg("%s - Got Chase Response", __func__);
 978
 979                         /* did we get all of our credit back? */
 980                         if (edge_port->txCredits == edge_port->maxTxCredits) {
 981                                 dbg("%s - Got all credits", __func__);
 982                                 return;
 983                         }
 984                 }
 985
 986                 /* Block the thread for a while */
 987                 prepare_to_wait(&edge_port->wait_chase, &wait,
 988                                                 TASK_UNINTERRUPTIBLE);
 989                 schedule_timeout(timeout);
 990                 finish_wait(&edge_port->wait_chase, &wait);
 991
 992                 if (lastCredits == edge_port->txCredits) {
 993                         /* No activity.. count down. */
 994                         loop--;
 995                         if (loop == 0) {
 996                                 edge_port->chaseResponsePending = false;
 997                                 dbg("%s - Chase TIMEOUT", __func__);
 998                                 return;
 999                         }
1000                 } else {
1001                         /* Reset timeout value back to 10 seconds */
1002                         dbg("%s - Last %d, Current %d", __func__,
1003                                         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 timeout 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", __func__);
1035                         return;
1036                 }
1037
1038                 /* Block the thread for a while */
1039                 prepare_to_wait(&edge_port->wait_chase, &wait,
1040                                                 TASK_UNINTERRUPTIBLE);
1041                 schedule_timeout(timeout);
1042                 finish_wait(&edge_port->wait_chase, &wait);
1043
1044                 dbg("%s wait", __func__);
1045
1046                 if (lastCount == fifo->count) {
1047                         /* No activity.. count down. */
1048                         loop--;
1049                         if (loop == 0) {
1050                                 dbg("%s - TIMEOUT", __func__);
1051                                 return;
1052                         }
1053                 } else {
1054                         /* Reset timeout value back to seconds */
1055                         loop = 30;
1056                 }
1057         }
1058 }
1059
1060
1061 /*****************************************************************************
1062  * edge_close
1063  *      this function is called by the tty driver when a port is closed
1064  *****************************************************************************/
1065 static void edge_close(struct usb_serial_port *port)
1066 {
1067         struct edgeport_serial *edge_serial;
1068         struct edgeport_port *edge_port;
1069         int status;
1070
1071         dbg("%s - port %d", __func__, port->number);
1072
1073         edge_serial = usb_get_serial_data(port->serial);
1074         edge_port = usb_get_serial_port_data(port);
1075         if (edge_serial == NULL || edge_port == NULL)
1076                 return;
1077
1078         /* block until tx is empty */
1079         block_until_tx_empty(edge_port);
1080
1081         edge_port->closePending = true;
1082
1083         if ((!edge_serial->is_epic) ||
1084             ((edge_serial->is_epic) &&
1085              (edge_serial->epic_descriptor.Supports.IOSPChase))) {
1086                 /* flush and chase */
1087                 edge_port->chaseResponsePending = true;
1088
1089                 dbg("%s - Sending IOSP_CMD_CHASE_PORT", __func__);
1090                 status = send_iosp_ext_cmd(edge_port, IOSP_CMD_CHASE_PORT, 0);
1091                 if (status == 0)
1092                         /* block until chase finished */
1093                         block_until_chase_response(edge_port);
1094                 else
1095                         edge_port->chaseResponsePending = false;
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", __func__);
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
1115                                 (old transfer) free it */
1116                 kfree(edge_port->write_urb->transfer_buffer);
1117                 usb_free_urb(edge_port->write_urb);
1118                 edge_port->write_urb = NULL;
1119         }
1120         kfree(edge_port->txfifo.fifo);
1121         edge_port->txfifo.fifo = NULL;
1122
1123         dbg("%s exited", __func__);
1124 }
1125
1126 /*****************************************************************************
1127  * SerialWrite
1128  *      this function is called by the tty driver when data should be written
1129  *      to the port.
1130  *      If successful, we return the number of bytes written, otherwise we
1131  *      return a negative error number.
1132  *****************************************************************************/
1133 static int edge_write(struct tty_struct *tty, struct usb_serial_port *port,
1134                                         const unsigned char *data, int count)
1135 {
1136         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1137         struct TxFifo *fifo;
1138         int copySize;
1139         int bytesleft;
1140         int firsthalf;
1141         int secondhalf;
1142         unsigned long flags;
1143
1144         dbg("%s - port %d", __func__, port->number);
1145
1146         if (edge_port == NULL)
1147                 return -ENODEV;
1148
1149         /* get a pointer to the Tx fifo */
1150         fifo = &edge_port->txfifo;
1151
1152         spin_lock_irqsave(&edge_port->ep_lock, flags);
1153
1154         /* calculate number of bytes to put in fifo */
1155         copySize = min((unsigned int)count,
1156                                 (edge_port->txCredits - fifo->count));
1157
1158         dbg("%s(%d) of %d byte(s) Fifo room  %d -- will copy %d bytes",
1159                         __func__, port->number, count,
1160                         edge_port->txCredits - fifo->count, copySize);
1161
1162         /* catch writes of 0 bytes which the tty driver likes to give us,
1163            and when txCredits is empty */
1164         if (copySize == 0) {
1165                 dbg("%s - copySize = Zero", __func__);
1166                 goto finish_write;
1167         }
1168
1169         /* queue the data
1170          * since we can never overflow the buffer we do not have to check for a
1171          * full condition
1172          *
1173          * the copy is done is two parts -- first fill to the end of the buffer
1174          * then copy the reset from the start of the buffer
1175          */
1176         bytesleft = fifo->size - fifo->head;
1177         firsthalf = min(bytesleft, copySize);
1178         dbg("%s - copy %d bytes of %d into fifo ", __func__,
1179                                         firsthalf, bytesleft);
1180
1181         /* now copy our data */
1182         memcpy(&fifo->fifo[fifo->head], data, firsthalf);
1183         usb_serial_debug_data(debug, &port->dev, __func__,
1184                                         firsthalf, &fifo->fifo[fifo->head]);
1185
1186         /* update the index and size */
1187         fifo->head  += firsthalf;
1188         fifo->count += firsthalf;
1189
1190         /* wrap the index */
1191         if (fifo->head == fifo->size)
1192                 fifo->head = 0;
1193
1194         secondhalf = copySize-firsthalf;
1195
1196         if (secondhalf) {
1197                 dbg("%s - copy rest of data %d", __func__, secondhalf);
1198                 memcpy(&fifo->fifo[fifo->head], &data[firsthalf], secondhalf);
1199                 usb_serial_debug_data(debug, &port->dev, __func__,
1200                                         secondhalf, &fifo->fifo[fifo->head]);
1201                 /* update the index and size */
1202                 fifo->count += secondhalf;
1203                 fifo->head  += secondhalf;
1204                 /* No need to check for wrap since we can not get to end of
1205                  * the fifo in this part
1206                  */
1207         }
1208
1209 finish_write:
1210         spin_unlock_irqrestore(&edge_port->ep_lock, flags);
1211
1212         send_more_port_data((struct edgeport_serial *)
1213                         usb_get_serial_data(port->serial), edge_port);
1214
1215         dbg("%s wrote %d byte(s) TxCredits %d, Fifo %d", __func__,
1216                                 copySize, edge_port->txCredits, fifo->count);
1217
1218         return copySize;
1219 }
1220
1221
1222 /************************************************************************
1223  *
1224  * send_more_port_data()
1225  *
1226  *      This routine attempts to write additional UART transmit data
1227  *      to a port over the USB bulk pipe. It is called (1) when new
1228  *      data has been written to a port's TxBuffer from higher layers
1229  *      (2) when the peripheral sends us additional TxCredits indicating
1230  *      that it can accept more Tx data for a given port; and (3) when
1231  *      a bulk write completes successfully and we want to see if we
1232  *      can transmit more.
1233  *
1234  ************************************************************************/
1235 static void send_more_port_data(struct edgeport_serial *edge_serial,
1236                                         struct edgeport_port *edge_port)
1237 {
1238         struct TxFifo   *fifo = &edge_port->txfifo;
1239         struct urb      *urb;
1240         unsigned char   *buffer;
1241         int             status;
1242         int             count;
1243         int             bytesleft;
1244         int             firsthalf;
1245         int             secondhalf;
1246         unsigned long   flags;
1247
1248         dbg("%s(%d)", __func__, edge_port->port->number);
1249
1250         spin_lock_irqsave(&edge_port->ep_lock, flags);
1251
1252         if (edge_port->write_in_progress ||
1253             !edge_port->open             ||
1254             (fifo->count == 0)) {
1255                 dbg("%s(%d) EXIT - fifo %d, PendingWrite = %d",
1256                                 __func__, edge_port->port->number,
1257                                 fifo->count, edge_port->write_in_progress);
1258                 goto exit_send;
1259         }
1260
1261         /* since the amount of data in the fifo will always fit into the
1262          * edgeport buffer we do not need to check the write length
1263          *
1264          * Do we have enough credits for this port to make it worthwhile
1265          * to bother queueing a write. If it's too small, say a few bytes,
1266          * it's better to wait for more credits so we can do a larger write.
1267          */
1268         if (edge_port->txCredits < EDGE_FW_GET_TX_CREDITS_SEND_THRESHOLD(edge_port->maxTxCredits, EDGE_FW_BULK_MAX_PACKET_SIZE)) {
1269                 dbg("%s(%d) Not enough credit - fifo %d TxCredit %d",
1270                         __func__, edge_port->port->number, fifo->count,
1271                         edge_port->txCredits);
1272                 goto exit_send;
1273         }
1274
1275         /* lock this write */
1276         edge_port->write_in_progress = true;
1277
1278         /* get a pointer to the write_urb */
1279         urb = edge_port->write_urb;
1280
1281         /* make sure transfer buffer is freed */
1282         kfree(urb->transfer_buffer);
1283         urb->transfer_buffer = NULL;
1284
1285         /* build the data header for the buffer and port that we are about
1286            to send out */
1287         count = fifo->count;
1288         buffer = kmalloc(count+2, GFP_ATOMIC);
1289         if (buffer == NULL) {
1290                 dev_err_console(edge_port->port,
1291                                 "%s - no more kernel memory...\n", __func__);
1292                 edge_port->write_in_progress = false;
1293                 goto exit_send;
1294         }
1295         buffer[0] = IOSP_BUILD_DATA_HDR1(edge_port->port->number
1296                                 - edge_port->port->serial->minor, count);
1297         buffer[1] = IOSP_BUILD_DATA_HDR2(edge_port->port->number
1298                                 - edge_port->port->serial->minor, count);
1299
1300         /* now copy our data */
1301         bytesleft =  fifo->size - fifo->tail;
1302         firsthalf = min(bytesleft, count);
1303         memcpy(&buffer[2], &fifo->fifo[fifo->tail], firsthalf);
1304         fifo->tail  += firsthalf;
1305         fifo->count -= firsthalf;
1306         if (fifo->tail == fifo->size)
1307                 fifo->tail = 0;
1308
1309         secondhalf = count-firsthalf;
1310         if (secondhalf) {
1311                 memcpy(&buffer[2+firsthalf], &fifo->fifo[fifo->tail],
1312                                                                 secondhalf);
1313                 fifo->tail  += secondhalf;
1314                 fifo->count -= secondhalf;
1315         }
1316
1317         if (count)
1318                 usb_serial_debug_data(debug, &edge_port->port->dev,
1319                                                 __func__, count, &buffer[2]);
1320
1321         /* fill up the urb with all of our data and submit it */
1322         usb_fill_bulk_urb(urb, edge_serial->serial->dev,
1323                         usb_sndbulkpipe(edge_serial->serial->dev,
1324                                         edge_serial->bulk_out_endpoint),
1325                         buffer, count+2,
1326                         edge_bulk_out_data_callback, edge_port);
1327
1328         /* decrement the number of credits we have by the number we just sent */
1329         edge_port->txCredits -= count;
1330         edge_port->icount.tx += count;
1331
1332         status = usb_submit_urb(urb, GFP_ATOMIC);
1333         if (status) {
1334                 /* something went wrong */
1335                 dev_err_console(edge_port->port,
1336                         "%s - usb_submit_urb(write bulk) failed, status = %d, data lost\n",
1337                                 __func__, status);
1338                 edge_port->write_in_progress = false;
1339
1340                 /* revert the credits as something bad happened. */
1341                 edge_port->txCredits += count;
1342                 edge_port->icount.tx -= count;
1343         }
1344         dbg("%s wrote %d byte(s) TxCredit %d, Fifo %d",
1345                         __func__, count, edge_port->txCredits, fifo->count);
1346
1347 exit_send:
1348         spin_unlock_irqrestore(&edge_port->ep_lock, flags);
1349 }
1350
1351
1352 /*****************************************************************************
1353  * edge_write_room
1354  *      this function is called by the tty driver when it wants to know how
1355  *      many bytes of data we can accept for a specific port. If successful,
1356  *      we return the amount of room that we have for this port (the txCredits)
1357  *      otherwise we return a negative error number.
1358  *****************************************************************************/
1359 static int edge_write_room(struct tty_struct *tty)
1360 {
1361         struct usb_serial_port *port = tty->driver_data;
1362         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1363         int room;
1364         unsigned long flags;
1365
1366         dbg("%s", __func__);
1367
1368         if (edge_port == NULL)
1369                 return 0;
1370         if (edge_port->closePending)
1371                 return 0;
1372
1373         dbg("%s - port %d", __func__, port->number);
1374
1375         if (!edge_port->open) {
1376                 dbg("%s - port not opened", __func__);
1377                 return 0;
1378         }
1379
1380         /* total of both buffers is still txCredit */
1381         spin_lock_irqsave(&edge_port->ep_lock, flags);
1382         room = edge_port->txCredits - edge_port->txfifo.count;
1383         spin_unlock_irqrestore(&edge_port->ep_lock, flags);
1384
1385         dbg("%s - returns %d", __func__, room);
1386         return room;
1387 }
1388
1389
1390 /*****************************************************************************
1391  * edge_chars_in_buffer
1392  *      this function is called by the tty driver when it wants to know how
1393  *      many bytes of data we currently have outstanding in the port (data that
1394  *      has been written, but hasn't made it out the port yet)
1395  *      If successful, we return the number of bytes left to be written in the
1396  *      system,
1397  *      Otherwise we return a negative error number.
1398  *****************************************************************************/
1399 static int edge_chars_in_buffer(struct tty_struct *tty)
1400 {
1401         struct usb_serial_port *port = tty->driver_data;
1402         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1403         int num_chars;
1404         unsigned long flags;
1405
1406         dbg("%s", __func__);
1407
1408         if (edge_port == NULL)
1409                 return 0;
1410         if (edge_port->closePending)
1411                 return 0;
1412
1413         if (!edge_port->open) {
1414                 dbg("%s - port not opened", __func__);
1415                 return 0;
1416         }
1417
1418         spin_lock_irqsave(&edge_port->ep_lock, flags);
1419         num_chars = edge_port->maxTxCredits - edge_port->txCredits +
1420                                                 edge_port->txfifo.count;
1421         spin_unlock_irqrestore(&edge_port->ep_lock, flags);
1422         if (num_chars) {
1423                 dbg("%s(port %d) - returns %d", __func__,
1424                                                 port->number, num_chars);
1425         }
1426
1427         return num_chars;
1428 }
1429
1430
1431 /*****************************************************************************
1432  * SerialThrottle
1433  *      this function is called by the tty driver when it wants to stop the data
1434  *      being read from the port.
1435  *****************************************************************************/
1436 static void edge_throttle(struct tty_struct *tty)
1437 {
1438         struct usb_serial_port *port = tty->driver_data;
1439         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1440         int status;
1441
1442         dbg("%s - port %d", __func__, port->number);
1443
1444         if (edge_port == NULL)
1445                 return;
1446
1447         if (!edge_port->open) {
1448                 dbg("%s - port not opened", __func__);
1449                 return;
1450         }
1451
1452         /* if we are implementing XON/XOFF, send the stop character */
1453         if (I_IXOFF(tty)) {
1454                 unsigned char stop_char = STOP_CHAR(tty);
1455                 status = edge_write(tty, port, &stop_char, 1);
1456                 if (status <= 0)
1457                         return;
1458         }
1459
1460         /* if we are implementing RTS/CTS, toggle that line */
1461         if (tty->termios.c_cflag & CRTSCTS) {
1462                 edge_port->shadowMCR &= ~MCR_RTS;
1463                 status = send_cmd_write_uart_register(edge_port, MCR,
1464                                                         edge_port->shadowMCR);
1465                 if (status != 0)
1466                         return;
1467         }
1468 }
1469
1470
1471 /*****************************************************************************
1472  * edge_unthrottle
1473  *      this function is called by the tty driver when it wants to resume the
1474  *      data being read from the port (called after SerialThrottle is called)
1475  *****************************************************************************/
1476 static void edge_unthrottle(struct tty_struct *tty)
1477 {
1478         struct usb_serial_port *port = tty->driver_data;
1479         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1480         int status;
1481
1482         dbg("%s - port %d", __func__, port->number);
1483
1484         if (edge_port == NULL)
1485                 return;
1486
1487         if (!edge_port->open) {
1488                 dbg("%s - port not opened", __func__);
1489                 return;
1490         }
1491
1492         /* if we are implementing XON/XOFF, send the start character */
1493         if (I_IXOFF(tty)) {
1494                 unsigned char start_char = START_CHAR(tty);
1495                 status = edge_write(tty, port, &start_char, 1);
1496                 if (status <= 0)
1497                         return;
1498         }
1499         /* if we are implementing RTS/CTS, toggle that line */
1500         if (tty->termios.c_cflag & CRTSCTS) {
1501                 edge_port->shadowMCR |= MCR_RTS;
1502                 send_cmd_write_uart_register(edge_port, MCR,
1503                                                 edge_port->shadowMCR);
1504         }
1505 }
1506
1507
1508 /*****************************************************************************
1509  * SerialSetTermios
1510  *      this function is called by the tty driver when it wants to change
1511  * the termios structure
1512  *****************************************************************************/
1513 static void edge_set_termios(struct tty_struct *tty,
1514         struct usb_serial_port *port, struct ktermios *old_termios)
1515 {
1516         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1517         unsigned int cflag;
1518
1519         cflag = tty->termios.c_cflag;
1520         dbg("%s - clfag %08x iflag %08x", __func__,
1521             tty->termios.c_cflag, tty->termios.c_iflag);
1522         dbg("%s - old clfag %08x old iflag %08x", __func__,
1523             old_termios->c_cflag, old_termios->c_iflag);
1524
1525         dbg("%s - port %d", __func__, port->number);
1526
1527         if (edge_port == NULL)
1528                 return;
1529
1530         if (!edge_port->open) {
1531                 dbg("%s - port not opened", __func__);
1532                 return;
1533         }
1534
1535         /* change the port settings to the new ones specified */
1536         change_port_settings(tty, edge_port, old_termios);
1537 }
1538
1539
1540 /*****************************************************************************
1541  * get_lsr_info - get line status register info
1542  *
1543  * Purpose: Let user call ioctl() to get info when the UART physically
1544  *          is emptied.  On bus types like RS485, the transmitter must
1545  *          release the bus after transmitting. This must be done when
1546  *          the transmit shift register is empty, not be done when the
1547  *          transmit holding register is empty.  This functionality
1548  *          allows an RS485 driver to be written in user space.
1549  *****************************************************************************/
1550 static int get_lsr_info(struct edgeport_port *edge_port,
1551                                                 unsigned int __user *value)
1552 {
1553         unsigned int result = 0;
1554         unsigned long flags;
1555
1556         spin_lock_irqsave(&edge_port->ep_lock, flags);
1557         if (edge_port->maxTxCredits == edge_port->txCredits &&
1558             edge_port->txfifo.count == 0) {
1559                 dbg("%s -- Empty", __func__);
1560                 result = TIOCSER_TEMT;
1561         }
1562         spin_unlock_irqrestore(&edge_port->ep_lock, flags);
1563
1564         if (copy_to_user(value, &result, sizeof(int)))
1565                 return -EFAULT;
1566         return 0;
1567 }
1568
1569 static int edge_tiocmset(struct tty_struct *tty,
1570                                         unsigned int set, unsigned int clear)
1571 {
1572         struct usb_serial_port *port = tty->driver_data;
1573         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1574         unsigned int mcr;
1575
1576         dbg("%s - port %d", __func__, port->number);
1577
1578         mcr = edge_port->shadowMCR;
1579         if (set & TIOCM_RTS)
1580                 mcr |= MCR_RTS;
1581         if (set & TIOCM_DTR)
1582                 mcr |= MCR_DTR;
1583         if (set & TIOCM_LOOP)
1584                 mcr |= MCR_LOOPBACK;
1585
1586         if (clear & TIOCM_RTS)
1587                 mcr &= ~MCR_RTS;
1588         if (clear & TIOCM_DTR)
1589                 mcr &= ~MCR_DTR;
1590         if (clear & TIOCM_LOOP)
1591                 mcr &= ~MCR_LOOPBACK;
1592
1593         edge_port->shadowMCR = mcr;
1594
1595         send_cmd_write_uart_register(edge_port, MCR, edge_port->shadowMCR);
1596
1597         return 0;
1598 }
1599
1600 static int edge_tiocmget(struct tty_struct *tty)
1601 {
1602         struct usb_serial_port *port = tty->driver_data;
1603         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1604         unsigned int result = 0;
1605         unsigned int msr;
1606         unsigned int mcr;
1607
1608         dbg("%s - port %d", __func__, port->number);
1609
1610         msr = edge_port->shadowMSR;
1611         mcr = edge_port->shadowMCR;
1612         result = ((mcr & MCR_DTR)       ? TIOCM_DTR: 0)   /* 0x002 */
1613                   | ((mcr & MCR_RTS)    ? TIOCM_RTS: 0)   /* 0x004 */
1614                   | ((msr & EDGEPORT_MSR_CTS)   ? TIOCM_CTS: 0)   /* 0x020 */
1615                   | ((msr & EDGEPORT_MSR_CD)    ? TIOCM_CAR: 0)   /* 0x040 */
1616                   | ((msr & EDGEPORT_MSR_RI)    ? TIOCM_RI:  0)   /* 0x080 */
1617                   | ((msr & EDGEPORT_MSR_DSR)   ? TIOCM_DSR: 0);  /* 0x100 */
1618
1619
1620         dbg("%s -- %x", __func__, result);
1621
1622         return result;
1623 }
1624
1625 static int edge_get_icount(struct tty_struct *tty,
1626                                 struct serial_icounter_struct *icount)
1627 {
1628         struct usb_serial_port *port = tty->driver_data;
1629         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1630         struct async_icount cnow;
1631         cnow = edge_port->icount;
1632
1633         icount->cts = cnow.cts;
1634         icount->dsr = cnow.dsr;
1635         icount->rng = cnow.rng;
1636         icount->dcd = cnow.dcd;
1637         icount->rx = cnow.rx;
1638         icount->tx = cnow.tx;
1639         icount->frame = cnow.frame;
1640         icount->overrun = cnow.overrun;
1641         icount->parity = cnow.parity;
1642         icount->brk = cnow.brk;
1643         icount->buf_overrun = cnow.buf_overrun;
1644
1645         dbg("%s (%d) TIOCGICOUNT RX=%d, TX=%d",
1646                         __func__,  port->number, icount->rx, icount->tx);
1647         return 0;
1648 }
1649
1650 static int get_serial_info(struct edgeport_port *edge_port,
1651                                 struct serial_struct __user *retinfo)
1652 {
1653         struct serial_struct tmp;
1654
1655         if (!retinfo)
1656                 return -EFAULT;
1657
1658         memset(&tmp, 0, sizeof(tmp));
1659
1660         tmp.type                = PORT_16550A;
1661         tmp.line                = edge_port->port->serial->minor;
1662         tmp.port                = edge_port->port->number;
1663         tmp.irq                 = 0;
1664         tmp.flags               = ASYNC_SKIP_TEST | ASYNC_AUTO_IRQ;
1665         tmp.xmit_fifo_size      = edge_port->maxTxCredits;
1666         tmp.baud_base           = 9600;
1667         tmp.close_delay         = 5*HZ;
1668         tmp.closing_wait        = 30*HZ;
1669
1670         if (copy_to_user(retinfo, &tmp, sizeof(*retinfo)))
1671                 return -EFAULT;
1672         return 0;
1673 }
1674
1675
1676 /*****************************************************************************
1677  * SerialIoctl
1678  *      this function handles any ioctl calls to the driver
1679  *****************************************************************************/
1680 static int edge_ioctl(struct tty_struct *tty,
1681                                         unsigned int cmd, unsigned long arg)
1682 {
1683         struct usb_serial_port *port = tty->driver_data;
1684         DEFINE_WAIT(wait);
1685         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1686         struct async_icount cnow;
1687         struct async_icount cprev;
1688
1689         dbg("%s - port %d, cmd = 0x%x", __func__, port->number, cmd);
1690
1691         switch (cmd) {
1692         case TIOCSERGETLSR:
1693                 dbg("%s (%d) TIOCSERGETLSR", __func__,  port->number);
1694                 return get_lsr_info(edge_port, (unsigned int __user *) arg);
1695
1696         case TIOCGSERIAL:
1697                 dbg("%s (%d) TIOCGSERIAL", __func__,  port->number);
1698                 return get_serial_info(edge_port, (struct serial_struct __user *) arg);
1699
1700         case TIOCMIWAIT:
1701                 dbg("%s (%d) TIOCMIWAIT", __func__,  port->number);
1702                 cprev = edge_port->icount;
1703                 while (1) {
1704                         prepare_to_wait(&edge_port->delta_msr_wait,
1705                                                 &wait, TASK_INTERRUPTIBLE);
1706                         schedule();
1707                         finish_wait(&edge_port->delta_msr_wait, &wait);
1708                         /* see if a signal did it */
1709                         if (signal_pending(current))
1710                                 return -ERESTARTSYS;
1711                         cnow = edge_port->icount;
1712                         if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr &&
1713                             cnow.dcd == cprev.dcd && cnow.cts == cprev.cts)
1714                                 return -EIO; /* no change => error */
1715                         if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
1716                             ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
1717                             ((arg & TIOCM_CD)  && (cnow.dcd != cprev.dcd)) ||
1718                             ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts))) {
1719                                 return 0;
1720                         }
1721                         cprev = cnow;
1722                 }
1723                 /* NOTREACHED */
1724                 break;
1725
1726         }
1727         return -ENOIOCTLCMD;
1728 }
1729
1730
1731 /*****************************************************************************
1732  * SerialBreak
1733  *      this function sends a break to the port
1734  *****************************************************************************/
1735 static void edge_break(struct tty_struct *tty, int break_state)
1736 {
1737         struct usb_serial_port *port = tty->driver_data;
1738         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1739         struct edgeport_serial *edge_serial = usb_get_serial_data(port->serial);
1740         int status;
1741
1742         if ((!edge_serial->is_epic) ||
1743             ((edge_serial->is_epic) &&
1744              (edge_serial->epic_descriptor.Supports.IOSPChase))) {
1745                 /* flush and chase */
1746                 edge_port->chaseResponsePending = true;
1747
1748                 dbg("%s - Sending IOSP_CMD_CHASE_PORT", __func__);
1749                 status = send_iosp_ext_cmd(edge_port, IOSP_CMD_CHASE_PORT, 0);
1750                 if (status == 0) {
1751                         /* block until chase finished */
1752                         block_until_chase_response(edge_port);
1753                 } else {
1754                         edge_port->chaseResponsePending = false;
1755                 }
1756         }
1757
1758         if ((!edge_serial->is_epic) ||
1759             ((edge_serial->is_epic) &&
1760              (edge_serial->epic_descriptor.Supports.IOSPSetClrBreak))) {
1761                 if (break_state == -1) {
1762                         dbg("%s - Sending IOSP_CMD_SET_BREAK", __func__);
1763                         status = send_iosp_ext_cmd(edge_port,
1764                                                 IOSP_CMD_SET_BREAK, 0);
1765                 } else {
1766                         dbg("%s - Sending IOSP_CMD_CLEAR_BREAK", __func__);
1767                         status = send_iosp_ext_cmd(edge_port,
1768                                                 IOSP_CMD_CLEAR_BREAK, 0);
1769                 }
1770                 if (status)
1771                         dbg("%s - error sending break set/clear command.",
1772                                 __func__);
1773         }
1774 }
1775
1776
1777 /*****************************************************************************
1778  * process_rcvd_data
1779  *      this function handles the data received on the bulk in pipe.
1780  *****************************************************************************/
1781 static void process_rcvd_data(struct edgeport_serial *edge_serial,
1782                                 unsigned char *buffer, __u16 bufferLength)
1783 {
1784         struct usb_serial_port *port;
1785         struct edgeport_port *edge_port;
1786         struct tty_struct *tty;
1787         __u16 lastBufferLength;
1788         __u16 rxLen;
1789
1790         dbg("%s", __func__);
1791
1792         lastBufferLength = bufferLength + 1;
1793
1794         while (bufferLength > 0) {
1795                 /* failsafe incase we get a message that we don't understand */
1796                 if (lastBufferLength == bufferLength) {
1797                         dbg("%s - stuck in loop, exiting it.", __func__);
1798                         break;
1799                 }
1800                 lastBufferLength = bufferLength;
1801
1802                 switch (edge_serial->rxState) {
1803                 case EXPECT_HDR1:
1804                         edge_serial->rxHeader1 = *buffer;
1805                         ++buffer;
1806                         --bufferLength;
1807
1808                         if (bufferLength == 0) {
1809                                 edge_serial->rxState = EXPECT_HDR2;
1810                                 break;
1811                         }
1812                         /* otherwise, drop on through */
1813                 case EXPECT_HDR2:
1814                         edge_serial->rxHeader2 = *buffer;
1815                         ++buffer;
1816                         --bufferLength;
1817
1818                         dbg("%s - Hdr1=%02X Hdr2=%02X", __func__,
1819                             edge_serial->rxHeader1, edge_serial->rxHeader2);
1820                         /* Process depending on whether this header is
1821                          * data or status */
1822
1823                         if (IS_CMD_STAT_HDR(edge_serial->rxHeader1)) {
1824                                 /* Decode this status header and go to
1825                                  * EXPECT_HDR1 (if we can process the status
1826                                  * with only 2 bytes), or go to EXPECT_HDR3 to
1827                                  * get the third byte. */
1828                                 edge_serial->rxPort =
1829                                     IOSP_GET_HDR_PORT(edge_serial->rxHeader1);
1830                                 edge_serial->rxStatusCode =
1831                                     IOSP_GET_STATUS_CODE(
1832                                                 edge_serial->rxHeader1);
1833
1834                                 if (!IOSP_STATUS_IS_2BYTE(
1835                                                 edge_serial->rxStatusCode)) {
1836                                         /* This status needs additional bytes.
1837                                          * Save what we have and then wait for
1838                                          * more data.
1839                                          */
1840                                         edge_serial->rxStatusParam
1841                                                 = edge_serial->rxHeader2;
1842                                         edge_serial->rxState = EXPECT_HDR3;
1843                                         break;
1844                                 }
1845                                 /* We have all the header bytes, process the
1846                                    status now */
1847                                 process_rcvd_status(edge_serial,
1848                                                 edge_serial->rxHeader2, 0);
1849                                 edge_serial->rxState = EXPECT_HDR1;
1850                                 break;
1851                         } else {
1852                                 edge_serial->rxPort =
1853                                     IOSP_GET_HDR_PORT(edge_serial->rxHeader1);
1854                                 edge_serial->rxBytesRemaining =
1855                                     IOSP_GET_HDR_DATA_LEN(
1856                                                 edge_serial->rxHeader1,
1857                                                 edge_serial->rxHeader2);
1858                                 dbg("%s - Data for Port %u Len %u",
1859                                                 __func__,
1860                                                 edge_serial->rxPort,
1861                                                 edge_serial->rxBytesRemaining);
1862
1863                                 /* ASSERT(DevExt->RxPort < DevExt->NumPorts);
1864                                  * ASSERT(DevExt->RxBytesRemaining <
1865                                  *              IOSP_MAX_DATA_LENGTH);
1866                                  */
1867
1868                                 if (bufferLength == 0) {
1869                                         edge_serial->rxState = EXPECT_DATA;
1870                                         break;
1871                                 }
1872                                 /* Else, drop through */
1873                         }
1874                 case EXPECT_DATA: /* Expect data */
1875                         if (bufferLength < edge_serial->rxBytesRemaining) {
1876                                 rxLen = bufferLength;
1877                                 /* Expect data to start next buffer */
1878                                 edge_serial->rxState = EXPECT_DATA;
1879                         } else {
1880                                 /* BufLen >= RxBytesRemaining */
1881                                 rxLen = edge_serial->rxBytesRemaining;
1882                                 /* Start another header next time */
1883                                 edge_serial->rxState = EXPECT_HDR1;
1884                         }
1885
1886                         bufferLength -= rxLen;
1887                         edge_serial->rxBytesRemaining -= rxLen;
1888
1889                         /* spit this data back into the tty driver if this
1890                            port is open */
1891                         if (rxLen) {
1892                                 port = edge_serial->serial->port[
1893                                                         edge_serial->rxPort];
1894                                 edge_port = usb_get_serial_port_data(port);
1895                                 if (edge_port->open) {
1896                                         tty = tty_port_tty_get(
1897                                                 &edge_port->port->port);
1898                                         if (tty) {
1899                                                 dbg("%s - Sending %d bytes to TTY for port %d",
1900                                                         __func__, rxLen, edge_serial->rxPort);
1901                                                 edge_tty_recv(&edge_serial->serial->dev->dev, tty, buffer, rxLen);
1902                                                 tty_kref_put(tty);
1903                                         }
1904                                         edge_port->icount.rx += rxLen;
1905                                 }
1906                                 buffer += rxLen;
1907                         }
1908                         break;
1909
1910                 case EXPECT_HDR3:       /* Expect 3rd byte of status header */
1911                         edge_serial->rxHeader3 = *buffer;
1912                         ++buffer;
1913                         --bufferLength;
1914
1915                         /* We have all the header bytes, process the
1916                            status now */
1917                         process_rcvd_status(edge_serial,
1918                                 edge_serial->rxStatusParam,
1919                                 edge_serial->rxHeader3);
1920                         edge_serial->rxState = EXPECT_HDR1;
1921                         break;
1922                 }
1923         }
1924 }
1925
1926
1927 /*****************************************************************************
1928  * process_rcvd_status
1929  *      this function handles the any status messages received on the
1930  *      bulk in pipe.
1931  *****************************************************************************/
1932 static void process_rcvd_status(struct edgeport_serial *edge_serial,
1933                                                 __u8 byte2, __u8 byte3)
1934 {
1935         struct usb_serial_port *port;
1936         struct edgeport_port *edge_port;
1937         struct tty_struct *tty;
1938         __u8 code = edge_serial->rxStatusCode;
1939
1940         /* switch the port pointer to the one being currently talked about */
1941         port = edge_serial->serial->port[edge_serial->rxPort];
1942         edge_port = usb_get_serial_port_data(port);
1943         if (edge_port == NULL) {
1944                 dev_err(&edge_serial->serial->dev->dev,
1945                         "%s - edge_port == NULL for port %d\n",
1946                                         __func__, edge_serial->rxPort);
1947                 return;
1948         }
1949
1950         dbg("%s - port %d", __func__, edge_serial->rxPort);
1951
1952         if (code == IOSP_EXT_STATUS) {
1953                 switch (byte2) {
1954                 case IOSP_EXT_STATUS_CHASE_RSP:
1955                         /* we want to do EXT status regardless of port
1956                          * open/closed */
1957                         dbg("%s - Port %u EXT CHASE_RSP Data = %02x",
1958                                         __func__, edge_serial->rxPort, byte3);
1959                         /* Currently, the only EXT_STATUS is Chase, so process
1960                          * here instead of one more call to one more subroutine
1961                          * If/when more EXT_STATUS, there'll be more work to do
1962                          * Also, we currently clear flag and close the port
1963                          * regardless of content of above's Byte3.
1964                          * We could choose to do something else when Byte3 says
1965                          * Timeout on Chase from Edgeport, like wait longer in
1966                          * block_until_chase_response, but for now we don't.
1967                          */
1968                         edge_port->chaseResponsePending = false;
1969                         wake_up(&edge_port->wait_chase);
1970                         return;
1971
1972                 case IOSP_EXT_STATUS_RX_CHECK_RSP:
1973                         dbg("%s ========== Port %u CHECK_RSP Sequence = %02x =============", __func__, edge_serial->rxPort, byte3);
1974                         /* Port->RxCheckRsp = true; */
1975                         return;
1976                 }
1977         }
1978
1979         if (code == IOSP_STATUS_OPEN_RSP) {
1980                 edge_port->txCredits = GET_TX_BUFFER_SIZE(byte3);
1981                 edge_port->maxTxCredits = edge_port->txCredits;
1982                 dbg("%s - Port %u Open Response Initial MSR = %02x TxBufferSize = %d", __func__, edge_serial->rxPort, byte2, edge_port->txCredits);
1983                 handle_new_msr(edge_port, byte2);
1984
1985                 /* send the current line settings to the port so we are
1986                    in sync with any further termios calls */
1987                 tty = tty_port_tty_get(&edge_port->port->port);
1988                 if (tty) {
1989                         change_port_settings(tty,
1990                                 edge_port, &tty->termios);
1991                         tty_kref_put(tty);
1992                 }
1993
1994                 /* we have completed the open */
1995                 edge_port->openPending = false;
1996                 edge_port->open = true;
1997                 wake_up(&edge_port->wait_open);
1998                 return;
1999         }
2000
2001         /* If port is closed, silently discard all rcvd status. We can
2002          * have cases where buffered status is received AFTER the close
2003          * port command is sent to the Edgeport.
2004          */
2005         if (!edge_port->open || edge_port->closePending)
2006                 return;
2007
2008         switch (code) {
2009         /* Not currently sent by Edgeport */
2010         case IOSP_STATUS_LSR:
2011                 dbg("%s - Port %u LSR Status = %02x",
2012                                         __func__, edge_serial->rxPort, byte2);
2013                 handle_new_lsr(edge_port, false, byte2, 0);
2014                 break;
2015
2016         case IOSP_STATUS_LSR_DATA:
2017                 dbg("%s - Port %u LSR Status = %02x, Data = %02x",
2018                                 __func__, edge_serial->rxPort, byte2, byte3);
2019                 /* byte2 is LSR Register */
2020                 /* byte3 is broken data byte */
2021                 handle_new_lsr(edge_port, true, byte2, byte3);
2022                 break;
2023         /*
2024          *      case IOSP_EXT_4_STATUS:
2025          *              dbg("%s - Port %u LSR Status = %02x Data = %02x",
2026          *                      __func__, edge_serial->rxPort, byte2, byte3);
2027          *              break;
2028          */
2029         case IOSP_STATUS_MSR:
2030                 dbg("%s - Port %u MSR Status = %02x",
2031                                         __func__, edge_serial->rxPort, byte2);
2032                 /*
2033                  * Process this new modem status and generate appropriate
2034                  * events, etc, based on the new status. This routine
2035                  * also saves the MSR in Port->ShadowMsr.
2036                  */
2037                 handle_new_msr(edge_port, byte2);
2038                 break;
2039
2040         default:
2041                 dbg("%s - Unrecognized IOSP status code %u", __func__, code);
2042                 break;
2043         }
2044 }
2045
2046
2047 /*****************************************************************************
2048  * edge_tty_recv
2049  *      this function passes data on to the tty flip buffer
2050  *****************************************************************************/
2051 static void edge_tty_recv(struct device *dev, struct tty_struct *tty,
2052                                         unsigned char *data, int length)
2053 {
2054         int cnt;
2055
2056         cnt = tty_insert_flip_string(tty, data, length);
2057         if (cnt < length) {
2058                 dev_err(dev, "%s - dropping data, %d bytes lost\n",
2059                                 __func__, length - cnt);
2060         }
2061         data += cnt;
2062         length -= cnt;
2063
2064         tty_flip_buffer_push(tty);
2065 }
2066
2067
2068 /*****************************************************************************
2069  * handle_new_msr
2070  *      this function handles any change to the msr register for a port.
2071  *****************************************************************************/
2072 static void handle_new_msr(struct edgeport_port *edge_port, __u8 newMsr)
2073 {
2074         struct  async_icount *icount;
2075
2076         dbg("%s %02x", __func__, newMsr);
2077
2078         if (newMsr & (EDGEPORT_MSR_DELTA_CTS | EDGEPORT_MSR_DELTA_DSR |
2079                         EDGEPORT_MSR_DELTA_RI | EDGEPORT_MSR_DELTA_CD)) {
2080                 icount = &edge_port->icount;
2081
2082                 /* update input line counters */
2083                 if (newMsr & EDGEPORT_MSR_DELTA_CTS)
2084                         icount->cts++;
2085                 if (newMsr & EDGEPORT_MSR_DELTA_DSR)
2086                         icount->dsr++;
2087                 if (newMsr & EDGEPORT_MSR_DELTA_CD)
2088                         icount->dcd++;
2089                 if (newMsr & EDGEPORT_MSR_DELTA_RI)
2090                         icount->rng++;
2091                 wake_up_interruptible(&edge_port->delta_msr_wait);
2092         }
2093
2094         /* Save the new modem status */
2095         edge_port->shadowMSR = newMsr & 0xf0;
2096 }
2097
2098
2099 /*****************************************************************************
2100  * handle_new_lsr
2101  *      this function handles any change to the lsr register for a port.
2102  *****************************************************************************/
2103 static void handle_new_lsr(struct edgeport_port *edge_port, __u8 lsrData,
2104                                                         __u8 lsr, __u8 data)
2105 {
2106         __u8 newLsr = (__u8) (lsr & (__u8)
2107                 (LSR_OVER_ERR | LSR_PAR_ERR | LSR_FRM_ERR | LSR_BREAK));
2108         struct async_icount *icount;
2109
2110         dbg("%s - %02x", __func__, newLsr);
2111
2112         edge_port->shadowLSR = lsr;
2113
2114         if (newLsr & LSR_BREAK) {
2115                 /*
2116                  * Parity and Framing errors only count if they
2117                  * occur exclusive of a break being
2118                  * received.
2119                  */
2120                 newLsr &= (__u8)(LSR_OVER_ERR | LSR_BREAK);
2121         }
2122
2123         /* Place LSR data byte into Rx buffer */
2124         if (lsrData) {
2125                 struct tty_struct *tty =
2126                                 tty_port_tty_get(&edge_port->port->port);
2127                 if (tty) {
2128                         edge_tty_recv(&edge_port->port->dev, tty, &data, 1);
2129                         tty_kref_put(tty);
2130                 }
2131         }
2132         /* update input line counters */
2133         icount = &edge_port->icount;
2134         if (newLsr & LSR_BREAK)
2135                 icount->brk++;
2136         if (newLsr & LSR_OVER_ERR)
2137                 icount->overrun++;
2138         if (newLsr & LSR_PAR_ERR)
2139                 icount->parity++;
2140         if (newLsr & LSR_FRM_ERR)
2141                 icount->frame++;
2142 }
2143
2144
2145 /****************************************************************************
2146  * sram_write
2147  *      writes a number of bytes to the Edgeport device's sram starting at the
2148  *      given address.
2149  *      If successful returns the number of bytes written, otherwise it returns
2150  *      a negative error number of the problem.
2151  ****************************************************************************/
2152 static int sram_write(struct usb_serial *serial, __u16 extAddr, __u16 addr,
2153                                         __u16 length, const __u8 *data)
2154 {
2155         int result;
2156         __u16 current_length;
2157         unsigned char *transfer_buffer;
2158
2159         dbg("%s - %x, %x, %d", __func__, extAddr, addr, length);
2160
2161         transfer_buffer =  kmalloc(64, GFP_KERNEL);
2162         if (!transfer_buffer) {
2163                 dev_err(&serial->dev->dev, "%s - kmalloc(%d) failed.\n",
2164                                                         __func__, 64);
2165                 return -ENOMEM;
2166         }
2167
2168         /* need to split these writes up into 64 byte chunks */
2169         result = 0;
2170         while (length > 0) {
2171                 if (length > 64)
2172                         current_length = 64;
2173                 else
2174                         current_length = length;
2175
2176 /*              dbg("%s - writing %x, %x, %d", __func__,
2177                                         extAddr, addr, current_length); */
2178                 memcpy(transfer_buffer, data, current_length);
2179                 result = usb_control_msg(serial->dev,
2180                                         usb_sndctrlpipe(serial->dev, 0),
2181                                         USB_REQUEST_ION_WRITE_RAM,
2182                                         0x40, addr, extAddr, transfer_buffer,
2183                                         current_length, 300);
2184                 if (result < 0)
2185                         break;
2186                 length -= current_length;
2187                 addr += current_length;
2188                 data += current_length;
2189         }
2190
2191         kfree(transfer_buffer);
2192         return result;
2193 }
2194
2195
2196 /****************************************************************************
2197  * rom_write
2198  *      writes a number of bytes to the Edgeport device's ROM starting at the
2199  *      given address.
2200  *      If successful returns the number of bytes written, otherwise it returns
2201  *      a negative error number of the problem.
2202  ****************************************************************************/
2203 static int rom_write(struct usb_serial *serial, __u16 extAddr, __u16 addr,
2204                                         __u16 length, const __u8 *data)
2205 {
2206         int result;
2207         __u16 current_length;
2208         unsigned char *transfer_buffer;
2209
2210 /*      dbg("%s - %x, %x, %d", __func__, extAddr, addr, length); */
2211
2212         transfer_buffer =  kmalloc(64, GFP_KERNEL);
2213         if (!transfer_buffer) {
2214                 dev_err(&serial->dev->dev, "%s - kmalloc(%d) failed.\n",
2215                                                                 __func__, 64);
2216                 return -ENOMEM;
2217         }
2218
2219         /* need to split these writes up into 64 byte chunks */
2220         result = 0;
2221         while (length > 0) {
2222                 if (length > 64)
2223                         current_length = 64;
2224                 else
2225                         current_length = length;
2226 /*              dbg("%s - writing %x, %x, %d", __func__,
2227                                         extAddr, addr, current_length); */
2228                 memcpy(transfer_buffer, data, current_length);
2229                 result = usb_control_msg(serial->dev,
2230                                         usb_sndctrlpipe(serial->dev, 0),
2231                                         USB_REQUEST_ION_WRITE_ROM, 0x40,
2232                                         addr, extAddr,
2233                                         transfer_buffer, current_length, 300);
2234                 if (result < 0)
2235                         break;
2236                 length -= current_length;
2237                 addr += current_length;
2238                 data += current_length;
2239         }
2240
2241         kfree(transfer_buffer);
2242         return result;
2243 }
2244
2245
2246 /****************************************************************************
2247  * rom_read
2248  *      reads a number of bytes from the Edgeport device starting at the given
2249  *      address.
2250  *      If successful returns the number of bytes read, otherwise it returns
2251  *      a negative error number of the problem.
2252  ****************************************************************************/
2253 static int rom_read(struct usb_serial *serial, __u16 extAddr,
2254                                         __u16 addr, __u16 length, __u8 *data)
2255 {
2256         int result;
2257         __u16 current_length;
2258         unsigned char *transfer_buffer;
2259
2260         dbg("%s - %x, %x, %d", __func__, extAddr, addr, length);
2261
2262         transfer_buffer =  kmalloc(64, GFP_KERNEL);
2263         if (!transfer_buffer) {
2264                 dev_err(&serial->dev->dev,
2265                         "%s - kmalloc(%d) failed.\n", __func__, 64);
2266                 return -ENOMEM;
2267         }
2268
2269         /* need to split these reads up into 64 byte chunks */
2270         result = 0;
2271         while (length > 0) {
2272                 if (length > 64)
2273                         current_length = 64;
2274                 else
2275                         current_length = length;
2276 /*              dbg("%s - %x, %x, %d", __func__,
2277                                 extAddr, addr, current_length); */
2278                 result = usb_control_msg(serial->dev,
2279                                         usb_rcvctrlpipe(serial->dev, 0),
2280                                         USB_REQUEST_ION_READ_ROM,
2281                                         0xC0, addr, extAddr, transfer_buffer,
2282                                         current_length, 300);
2283                 if (result < 0)
2284                         break;
2285                 memcpy(data, transfer_buffer, current_length);
2286                 length -= current_length;
2287                 addr += current_length;
2288                 data += current_length;
2289         }
2290
2291         kfree(transfer_buffer);
2292         return result;
2293 }
2294
2295
2296 /****************************************************************************
2297  * send_iosp_ext_cmd
2298  *      Is used to send a IOSP message to the Edgeport device
2299  ****************************************************************************/
2300 static int send_iosp_ext_cmd(struct edgeport_port *edge_port,
2301                                                 __u8 command, __u8 param)
2302 {
2303         unsigned char   *buffer;
2304         unsigned char   *currentCommand;
2305         int             length = 0;
2306         int             status = 0;
2307
2308         dbg("%s - %d, %d", __func__, command, param);
2309
2310         buffer = kmalloc(10, GFP_ATOMIC);
2311         if (!buffer) {
2312                 dev_err(&edge_port->port->dev,
2313                                 "%s - kmalloc(%d) failed.\n", __func__, 10);
2314                 return -ENOMEM;
2315         }
2316
2317         currentCommand = buffer;
2318
2319         MAKE_CMD_EXT_CMD(&currentCommand, &length,
2320                 edge_port->port->number - edge_port->port->serial->minor,
2321                 command, param);
2322
2323         status = write_cmd_usb(edge_port, buffer, length);
2324         if (status) {
2325                 /* something bad happened, let's free up the memory */
2326                 kfree(buffer);
2327         }
2328
2329         return status;
2330 }
2331
2332
2333 /*****************************************************************************
2334  * write_cmd_usb
2335  *      this function writes the given buffer out to the bulk write endpoint.
2336  *****************************************************************************/
2337 static int write_cmd_usb(struct edgeport_port *edge_port,
2338                                         unsigned char *buffer, int length)
2339 {
2340         struct edgeport_serial *edge_serial =
2341                                 usb_get_serial_data(edge_port->port->serial);
2342         int status = 0;
2343         struct urb *urb;
2344
2345         usb_serial_debug_data(debug, &edge_port->port->dev,
2346                                                 __func__, length, buffer);
2347
2348         /* Allocate our next urb */
2349         urb = usb_alloc_urb(0, GFP_ATOMIC);
2350         if (!urb)
2351                 return -ENOMEM;
2352
2353         atomic_inc(&CmdUrbs);
2354         dbg("%s - ALLOCATE URB %p (outstanding %d)",
2355                                 __func__, urb, atomic_read(&CmdUrbs));
2356
2357         usb_fill_bulk_urb(urb, edge_serial->serial->dev,
2358                         usb_sndbulkpipe(edge_serial->serial->dev,
2359                                         edge_serial->bulk_out_endpoint),
2360                         buffer, length, edge_bulk_out_cmd_callback, edge_port);
2361
2362         edge_port->commandPending = true;
2363         status = usb_submit_urb(urb, GFP_ATOMIC);
2364
2365         if (status) {
2366                 /* something went wrong */
2367                 dev_err(&edge_port->port->dev,
2368                     "%s - usb_submit_urb(write command) failed, status = %d\n",
2369                                                         __func__, status);
2370                 usb_kill_urb(urb);
2371                 usb_free_urb(urb);
2372                 atomic_dec(&CmdUrbs);
2373                 return status;
2374         }
2375
2376 #if 0
2377         wait_event(&edge_port->wait_command, !edge_port->commandPending);
2378
2379         if (edge_port->commandPending) {
2380                 /* command timed out */
2381                 dbg("%s - command timed out", __func__);
2382                 status = -EINVAL;
2383         }
2384 #endif
2385         return status;
2386 }
2387
2388
2389 /*****************************************************************************
2390  * send_cmd_write_baud_rate
2391  *      this function sends the proper command to change the baud rate of the
2392  *      specified port.
2393  *****************************************************************************/
2394 static int send_cmd_write_baud_rate(struct edgeport_port *edge_port,
2395                                                                 int baudRate)
2396 {
2397         struct edgeport_serial *edge_serial =
2398                                 usb_get_serial_data(edge_port->port->serial);
2399         unsigned char *cmdBuffer;
2400         unsigned char *currCmd;
2401         int cmdLen = 0;
2402         int divisor;
2403         int status;
2404         unsigned char number =
2405                 edge_port->port->number - edge_port->port->serial->minor;
2406
2407         if (edge_serial->is_epic &&
2408             !edge_serial->epic_descriptor.Supports.IOSPSetBaudRate) {
2409                 dbg("SendCmdWriteBaudRate - NOT Setting baud rate for port = %d, baud = %d",
2410                     edge_port->port->number, baudRate);
2411                 return 0;
2412         }
2413
2414         dbg("%s - port = %d, baud = %d", __func__,
2415                                         edge_port->port->number, baudRate);
2416
2417         status = calc_baud_rate_divisor(baudRate, &divisor);
2418         if (status) {
2419                 dev_err(&edge_port->port->dev, "%s - bad baud rate\n",
2420                                                                 __func__);
2421                 return status;
2422         }
2423
2424         /* Alloc memory for the string of commands. */
2425         cmdBuffer =  kmalloc(0x100, GFP_ATOMIC);
2426         if (!cmdBuffer) {
2427                 dev_err(&edge_port->port->dev,
2428                         "%s - kmalloc(%d) failed.\n", __func__, 0x100);
2429                 return -ENOMEM;
2430         }
2431         currCmd = cmdBuffer;
2432
2433         /* Enable access to divisor latch */
2434         MAKE_CMD_WRITE_REG(&currCmd, &cmdLen, number, LCR, LCR_DL_ENABLE);
2435
2436         /* Write the divisor itself */
2437         MAKE_CMD_WRITE_REG(&currCmd, &cmdLen, number, DLL, LOW8(divisor));
2438         MAKE_CMD_WRITE_REG(&currCmd, &cmdLen, number, DLM, HIGH8(divisor));
2439
2440         /* Restore original value to disable access to divisor latch */
2441         MAKE_CMD_WRITE_REG(&currCmd, &cmdLen, number, LCR,
2442                                                 edge_port->shadowLCR);
2443
2444         status = write_cmd_usb(edge_port, cmdBuffer, cmdLen);
2445         if (status) {
2446                 /* something bad happened, let's free up the memory */
2447                 kfree(cmdBuffer);
2448         }
2449
2450         return status;
2451 }
2452
2453
2454 /*****************************************************************************
2455  * calc_baud_rate_divisor
2456  *      this function calculates the proper baud rate divisor for the specified
2457  *      baud rate.
2458  *****************************************************************************/
2459 static int calc_baud_rate_divisor(int baudrate, int *divisor)
2460 {
2461         int i;
2462         __u16 custom;
2463
2464
2465         dbg("%s - %d", __func__, baudrate);
2466
2467         for (i = 0; i < ARRAY_SIZE(divisor_table); i++) {
2468                 if (divisor_table[i].BaudRate == baudrate) {
2469                         *divisor = divisor_table[i].Divisor;
2470                         return 0;
2471                 }
2472         }
2473
2474         /* We have tried all of the standard baud rates
2475          * lets try to calculate the divisor for this baud rate
2476          * Make sure the baud rate is reasonable */
2477         if (baudrate > 50 && baudrate < 230400) {
2478                 /* get divisor */
2479                 custom = (__u16)((230400L + baudrate/2) / baudrate);
2480
2481                 *divisor = custom;
2482
2483                 dbg("%s - Baud %d = %d", __func__, baudrate, custom);
2484                 return 0;
2485         }
2486
2487         return -1;
2488 }
2489
2490
2491 /*****************************************************************************
2492  * send_cmd_write_uart_register
2493  *  this function builds up a uart register message and sends to the device.
2494  *****************************************************************************/
2495 static int send_cmd_write_uart_register(struct edgeport_port *edge_port,
2496                                                 __u8 regNum, __u8 regValue)
2497 {
2498         struct edgeport_serial *edge_serial =
2499                                 usb_get_serial_data(edge_port->port->serial);
2500         unsigned char *cmdBuffer;
2501         unsigned char *currCmd;
2502         unsigned long cmdLen = 0;
2503         int status;
2504
2505         dbg("%s - write to %s register 0x%02x",
2506                         (regNum == MCR) ? "MCR" : "LCR", __func__, regValue);
2507
2508         if (edge_serial->is_epic &&
2509             !edge_serial->epic_descriptor.Supports.IOSPWriteMCR &&
2510             regNum == MCR) {
2511                 dbg("SendCmdWriteUartReg - Not writing to MCR Register");
2512                 return 0;
2513         }
2514
2515         if (edge_serial->is_epic &&
2516             !edge_serial->epic_descriptor.Supports.IOSPWriteLCR &&
2517             regNum == LCR) {
2518                 dbg("SendCmdWriteUartReg - Not writing to LCR Register");
2519                 return 0;
2520         }
2521
2522         /* Alloc memory for the string of commands. */
2523         cmdBuffer = kmalloc(0x10, GFP_ATOMIC);
2524         if (cmdBuffer == NULL)
2525                 return -ENOMEM;
2526
2527         currCmd = cmdBuffer;
2528
2529         /* Build a cmd in the buffer to write the given register */
2530         MAKE_CMD_WRITE_REG(&currCmd, &cmdLen,
2531                 edge_port->port->number - edge_port->port->serial->minor,
2532                 regNum, regValue);
2533
2534         status = write_cmd_usb(edge_port, cmdBuffer, cmdLen);
2535         if (status) {
2536                 /* something bad happened, let's free up the memory */
2537                 kfree(cmdBuffer);
2538         }
2539
2540         return status;
2541 }
2542
2543
2544 /*****************************************************************************
2545  * change_port_settings
2546  *      This routine is called to set the UART on the device to match the
2547  *      specified new settings.
2548  *****************************************************************************/
2549
2550 static void change_port_settings(struct tty_struct *tty,
2551         struct edgeport_port *edge_port, struct ktermios *old_termios)
2552 {
2553         struct edgeport_serial *edge_serial =
2554                         usb_get_serial_data(edge_port->port->serial);
2555         int baud;
2556         unsigned cflag;
2557         __u8 mask = 0xff;
2558         __u8 lData;
2559         __u8 lParity;
2560         __u8 lStop;
2561         __u8 rxFlow;
2562         __u8 txFlow;
2563         int status;
2564
2565         dbg("%s - port %d", __func__, edge_port->port->number);
2566
2567         if (!edge_port->open &&
2568             !edge_port->openPending) {
2569                 dbg("%s - port not opened", __func__);
2570                 return;
2571         }
2572
2573         cflag = tty->termios.c_cflag;
2574
2575         switch (cflag & CSIZE) {
2576         case CS5:
2577                 lData = LCR_BITS_5; mask = 0x1f;
2578                 dbg("%s - data bits = 5", __func__);
2579                 break;
2580         case CS6:
2581                 lData = LCR_BITS_6; mask = 0x3f;
2582                 dbg("%s - data bits = 6", __func__);
2583                 break;
2584         case CS7:
2585                 lData = LCR_BITS_7; mask = 0x7f;
2586                 dbg("%s - data bits = 7", __func__);
2587                 break;
2588         default:
2589         case CS8:
2590                 lData = LCR_BITS_8;
2591                 dbg("%s - data bits = 8", __func__);
2592                 break;
2593         }
2594
2595         lParity = LCR_PAR_NONE;
2596         if (cflag & PARENB) {
2597                 if (cflag & CMSPAR) {
2598                         if (cflag & PARODD) {
2599                                 lParity = LCR_PAR_MARK;
2600                                 dbg("%s - parity = mark", __func__);
2601                         } else {
2602                                 lParity = LCR_PAR_SPACE;
2603                                 dbg("%s - parity = space", __func__);
2604                         }
2605                 } else if (cflag & PARODD) {
2606                         lParity = LCR_PAR_ODD;
2607                         dbg("%s - parity = odd", __func__);
2608                 } else {
2609                         lParity = LCR_PAR_EVEN;
2610                         dbg("%s - parity = even", __func__);
2611                 }
2612         } else {
2613                 dbg("%s - parity = none", __func__);
2614         }
2615
2616         if (cflag & CSTOPB) {
2617                 lStop = LCR_STOP_2;
2618                 dbg("%s - stop bits = 2", __func__);
2619         } else {
2620                 lStop = LCR_STOP_1;
2621                 dbg("%s - stop bits = 1", __func__);
2622         }
2623
2624         /* figure out the flow control settings */
2625         rxFlow = txFlow = 0x00;
2626         if (cflag & CRTSCTS) {
2627                 rxFlow |= IOSP_RX_FLOW_RTS;
2628                 txFlow |= IOSP_TX_FLOW_CTS;
2629                 dbg("%s - RTS/CTS is enabled", __func__);
2630         } else {
2631                 dbg("%s - RTS/CTS is disabled", __func__);
2632         }
2633
2634         /* if we are implementing XON/XOFF, set the start and stop character
2635            in the device */
2636         if (I_IXOFF(tty) || I_IXON(tty)) {
2637                 unsigned char stop_char  = STOP_CHAR(tty);
2638                 unsigned char start_char = START_CHAR(tty);
2639
2640                 if ((!edge_serial->is_epic) ||
2641                     ((edge_serial->is_epic) &&
2642                      (edge_serial->epic_descriptor.Supports.IOSPSetXChar))) {
2643                         send_iosp_ext_cmd(edge_port,
2644                                         IOSP_CMD_SET_XON_CHAR, start_char);
2645                         send_iosp_ext_cmd(edge_port,
2646                                         IOSP_CMD_SET_XOFF_CHAR, stop_char);
2647                 }
2648
2649                 /* if we are implementing INBOUND XON/XOFF */
2650                 if (I_IXOFF(tty)) {
2651                         rxFlow |= IOSP_RX_FLOW_XON_XOFF;
2652                         dbg("%s - INBOUND XON/XOFF is enabled, XON = %2x, XOFF = %2x",
2653                                         __func__, start_char, stop_char);
2654                 } else {
2655                         dbg("%s - INBOUND XON/XOFF is disabled", __func__);
2656                 }
2657
2658                 /* if we are implementing OUTBOUND XON/XOFF */
2659                 if (I_IXON(tty)) {
2660                         txFlow |= IOSP_TX_FLOW_XON_XOFF;
2661                         dbg("%s - OUTBOUND XON/XOFF is enabled, XON = %2x, XOFF = %2x",
2662                                         __func__, start_char, stop_char);
2663                 } else {
2664                         dbg("%s - OUTBOUND XON/XOFF is disabled", __func__);
2665                 }
2666         }
2667
2668         /* Set flow control to the configured value */
2669         if ((!edge_serial->is_epic) ||
2670             ((edge_serial->is_epic) &&
2671              (edge_serial->epic_descriptor.Supports.IOSPSetRxFlow)))
2672                 send_iosp_ext_cmd(edge_port, IOSP_CMD_SET_RX_FLOW, rxFlow);
2673         if ((!edge_serial->is_epic) ||
2674             ((edge_serial->is_epic) &&
2675              (edge_serial->epic_descriptor.Supports.IOSPSetTxFlow)))
2676                 send_iosp_ext_cmd(edge_port, IOSP_CMD_SET_TX_FLOW, txFlow);
2677
2678
2679         edge_port->shadowLCR &= ~(LCR_BITS_MASK | LCR_STOP_MASK | LCR_PAR_MASK);
2680         edge_port->shadowLCR |= (lData | lParity | lStop);
2681
2682         edge_port->validDataMask = mask;
2683
2684         /* Send the updated LCR value to the EdgePort */
2685         status = send_cmd_write_uart_register(edge_port, LCR,
2686                                                         edge_port->shadowLCR);
2687         if (status != 0)
2688                 return;
2689
2690         /* set up the MCR register and send it to the EdgePort */
2691         edge_port->shadowMCR = MCR_MASTER_IE;
2692         if (cflag & CBAUD)
2693                 edge_port->shadowMCR |= (MCR_DTR | MCR_RTS);
2694
2695         status = send_cmd_write_uart_register(edge_port, MCR,
2696                                                 edge_port->shadowMCR);
2697         if (status != 0)
2698                 return;
2699
2700         /* Determine divisor based on baud rate */
2701         baud = tty_get_baud_rate(tty);
2702         if (!baud) {
2703                 /* pick a default, any default... */
2704                 baud = 9600;
2705         }
2706
2707         dbg("%s - baud rate = %d", __func__, baud);
2708         status = send_cmd_write_baud_rate(edge_port, baud);
2709         if (status == -1) {
2710                 /* Speed change was not possible - put back the old speed */
2711                 baud = tty_termios_baud_rate(old_termios);
2712                 tty_encode_baud_rate(tty, baud, baud);
2713         }
2714 }
2715
2716
2717 /****************************************************************************
2718  * unicode_to_ascii
2719  *      Turns a string from Unicode into ASCII.
2720  *      Doesn't do a good job with any characters that are outside the normal
2721  *      ASCII range, but it's only for debugging...
2722  *      NOTE: expects the unicode in LE format
2723  ****************************************************************************/
2724 static void unicode_to_ascii(char *string, int buflen,
2725                                         __le16 *unicode, int unicode_size)
2726 {
2727         int i;
2728
2729         if (buflen <= 0)        /* never happens, but... */
2730                 return;
2731         --buflen;               /* space for nul */
2732
2733         for (i = 0; i < unicode_size; i++) {
2734                 if (i >= buflen)
2735                         break;
2736                 string[i] = (char)(le16_to_cpu(unicode[i]));
2737         }
2738         string[i] = 0x00;
2739 }
2740
2741
2742 /****************************************************************************
2743  * get_manufacturing_desc
2744  *      reads in the manufacturing descriptor and stores it into the serial
2745  *      structure.
2746  ****************************************************************************/
2747 static void get_manufacturing_desc(struct edgeport_serial *edge_serial)
2748 {
2749         int response;
2750
2751         dbg("getting manufacturer descriptor");
2752
2753         response = rom_read(edge_serial->serial,
2754                                 (EDGE_MANUF_DESC_ADDR & 0xffff0000) >> 16,
2755                                 (__u16)(EDGE_MANUF_DESC_ADDR & 0x0000ffff),
2756                                 EDGE_MANUF_DESC_LEN,
2757                                 (__u8 *)(&edge_serial->manuf_descriptor));
2758
2759         if (response < 1)
2760                 dev_err(&edge_serial->serial->dev->dev,
2761                         "error in getting manufacturer descriptor\n");
2762         else {
2763                 char string[30];
2764                 dbg("**Manufacturer Descriptor");
2765                 dbg("  RomSize:        %dK",
2766                         edge_serial->manuf_descriptor.RomSize);
2767                 dbg("  RamSize:        %dK",
2768                         edge_serial->manuf_descriptor.RamSize);
2769                 dbg("  CpuRev:         %d",
2770                         edge_serial->manuf_descriptor.CpuRev);
2771                 dbg("  BoardRev:       %d",
2772                         edge_serial->manuf_descriptor.BoardRev);
2773                 dbg("  NumPorts:       %d",
2774                         edge_serial->manuf_descriptor.NumPorts);
2775                 dbg("  DescDate:       %d/%d/%d",
2776                         edge_serial->manuf_descriptor.DescDate[0],
2777                         edge_serial->manuf_descriptor.DescDate[1],
2778                         edge_serial->manuf_descriptor.DescDate[2]+1900);
2779                 unicode_to_ascii(string, sizeof(string),
2780                         edge_serial->manuf_descriptor.SerialNumber,
2781                         edge_serial->manuf_descriptor.SerNumLength/2);
2782                 dbg("  SerialNumber: %s", string);
2783                 unicode_to_ascii(string, sizeof(string),
2784                         edge_serial->manuf_descriptor.AssemblyNumber,
2785                         edge_serial->manuf_descriptor.AssemblyNumLength/2);
2786                 dbg("  AssemblyNumber: %s", string);
2787                 unicode_to_ascii(string, sizeof(string),
2788                     edge_serial->manuf_descriptor.OemAssyNumber,
2789                     edge_serial->manuf_descriptor.OemAssyNumLength/2);
2790                 dbg("  OemAssyNumber:  %s", string);
2791                 dbg("  UartType:       %d",
2792                         edge_serial->manuf_descriptor.UartType);
2793                 dbg("  IonPid:         %d",
2794                         edge_serial->manuf_descriptor.IonPid);
2795                 dbg("  IonConfig:      %d",
2796                         edge_serial->manuf_descriptor.IonConfig);
2797         }
2798 }
2799
2800
2801 /****************************************************************************
2802  * get_boot_desc
2803  *      reads in the bootloader descriptor and stores it into the serial
2804  *      structure.
2805  ****************************************************************************/
2806 static void get_boot_desc(struct edgeport_serial *edge_serial)
2807 {
2808         int response;
2809
2810         dbg("getting boot descriptor");
2811
2812         response = rom_read(edge_serial->serial,
2813                                 (EDGE_BOOT_DESC_ADDR & 0xffff0000) >> 16,
2814                                 (__u16)(EDGE_BOOT_DESC_ADDR & 0x0000ffff),
2815                                 EDGE_BOOT_DESC_LEN,
2816                                 (__u8 *)(&edge_serial->boot_descriptor));
2817
2818         if (response < 1)
2819                 dev_err(&edge_serial->serial->dev->dev,
2820                                 "error in getting boot descriptor\n");
2821         else {
2822                 dbg("**Boot Descriptor:");
2823                 dbg("  BootCodeLength: %d",
2824                     le16_to_cpu(edge_serial->boot_descriptor.BootCodeLength));
2825                 dbg("  MajorVersion:   %d",
2826                         edge_serial->boot_descriptor.MajorVersion);
2827                 dbg("  MinorVersion:   %d",
2828                         edge_serial->boot_descriptor.MinorVersion);
2829                 dbg("  BuildNumber:    %d",
2830                         le16_to_cpu(edge_serial->boot_descriptor.BuildNumber));
2831                 dbg("  Capabilities:   0x%x",
2832                       le16_to_cpu(edge_serial->boot_descriptor.Capabilities));
2833                 dbg("  UConfig0:       %d",
2834                         edge_serial->boot_descriptor.UConfig0);
2835                 dbg("  UConfig1:       %d",
2836                         edge_serial->boot_descriptor.UConfig1);
2837         }
2838 }
2839
2840
2841 /****************************************************************************
2842  * load_application_firmware
2843  *      This is called to load the application firmware to the device
2844  ****************************************************************************/
2845 static void load_application_firmware(struct edgeport_serial *edge_serial)
2846 {
2847         const struct ihex_binrec *rec;
2848         const struct firmware *fw;
2849         const char *fw_name;
2850         const char *fw_info;
2851         int response;
2852         __u32 Operaddr;
2853         __u16 build;
2854
2855         switch (edge_serial->product_info.iDownloadFile) {
2856                 case EDGE_DOWNLOAD_FILE_I930:
2857                         fw_info = "downloading firmware version (930)";
2858                         fw_name = "edgeport/down.fw";
2859                         break;
2860
2861                 case EDGE_DOWNLOAD_FILE_80251:
2862                         fw_info = "downloading firmware version (80251)";
2863                         fw_name = "edgeport/down2.fw";
2864                         break;
2865
2866                 case EDGE_DOWNLOAD_FILE_NONE:
2867                         dbg("No download file specified, skipping download");
2868                         return;
2869
2870                 default:
2871                         return;
2872         }
2873
2874         response = request_ihex_firmware(&fw, fw_name,
2875                                     &edge_serial->serial->dev->dev);
2876         if (response) {
2877                 printk(KERN_ERR "Failed to load image \"%s\" err %d\n",
2878                        fw_name, response);
2879                 return;
2880         }
2881
2882         rec = (const struct ihex_binrec *)fw->data;
2883         build = (rec->data[2] << 8) | rec->data[3];
2884
2885         dbg("%s %d.%d.%d", fw_info, rec->data[0], rec->data[1], build);
2886
2887         edge_serial->product_info.FirmwareMajorVersion = rec->data[0];
2888         edge_serial->product_info.FirmwareMinorVersion = rec->data[1];
2889         edge_serial->product_info.FirmwareBuildNumber = cpu_to_le16(build);
2890
2891         for (rec = ihex_next_binrec(rec); rec;
2892              rec = ihex_next_binrec(rec)) {
2893                 Operaddr = be32_to_cpu(rec->addr);
2894                 response = sram_write(edge_serial->serial,
2895                                      Operaddr >> 16,
2896                                      Operaddr & 0xFFFF,
2897                                      be16_to_cpu(rec->len),
2898                                      &rec->data[0]);
2899                 if (response < 0) {
2900                         dev_err(&edge_serial->serial->dev->dev,
2901                                 "sram_write failed (%x, %x, %d)\n",
2902                                 Operaddr >> 16, Operaddr & 0xFFFF,
2903                                 be16_to_cpu(rec->len));
2904                         break;
2905                 }
2906         }
2907
2908         dbg("sending exec_dl_code");
2909         response = usb_control_msg (edge_serial->serial->dev,
2910                                     usb_sndctrlpipe(edge_serial->serial->dev, 0),
2911                                     USB_REQUEST_ION_EXEC_DL_CODE,
2912                                     0x40, 0x4000, 0x0001, NULL, 0, 3000);
2913
2914         release_firmware(fw);
2915 }
2916
2917
2918 /****************************************************************************
2919  * edge_startup
2920  ****************************************************************************/
2921 static int edge_startup(struct usb_serial *serial)
2922 {
2923         struct edgeport_serial *edge_serial;
2924         struct edgeport_port *edge_port;
2925         struct usb_device *dev;
2926         int i, j;
2927         int response;
2928         bool interrupt_in_found;
2929         bool bulk_in_found;
2930         bool bulk_out_found;
2931         static __u32 descriptor[3] = {  EDGE_COMPATIBILITY_MASK0,
2932                                         EDGE_COMPATIBILITY_MASK1,
2933                                         EDGE_COMPATIBILITY_MASK2 };
2934
2935         dev = serial->dev;
2936
2937         /* create our private serial structure */
2938         edge_serial = kzalloc(sizeof(struct edgeport_serial), GFP_KERNEL);
2939         if (edge_serial == NULL) {
2940                 dev_err(&serial->dev->dev, "%s - Out of memory\n", __func__);
2941                 return -ENOMEM;
2942         }
2943         spin_lock_init(&edge_serial->es_lock);
2944         edge_serial->serial = serial;
2945         usb_set_serial_data(serial, edge_serial);
2946
2947         /* get the name for the device from the device */
2948         i = usb_string(dev, dev->descriptor.iManufacturer,
2949             &edge_serial->name[0], MAX_NAME_LEN+1);
2950         if (i < 0)
2951                 i = 0;
2952         edge_serial->name[i++] = ' ';
2953         usb_string(dev, dev->descriptor.iProduct,
2954             &edge_serial->name[i], MAX_NAME_LEN+2 - i);
2955
2956         dev_info(&serial->dev->dev, "%s detected\n", edge_serial->name);
2957
2958         /* Read the epic descriptor */
2959         if (get_epic_descriptor(edge_serial) <= 0) {
2960                 /* memcpy descriptor to Supports structures */
2961                 memcpy(&edge_serial->epic_descriptor.Supports, descriptor,
2962                        sizeof(struct edge_compatibility_bits));
2963
2964                 /* get the manufacturing descriptor for this device */
2965                 get_manufacturing_desc(edge_serial);
2966
2967                 /* get the boot descriptor */
2968                 get_boot_desc(edge_serial);
2969
2970                 get_product_info(edge_serial);
2971         }
2972
2973         /* set the number of ports from the manufacturing description */
2974         /* serial->num_ports = serial->product_info.NumPorts; */
2975         if ((!edge_serial->is_epic) &&
2976             (edge_serial->product_info.NumPorts != serial->num_ports)) {
2977                 dev_warn(&serial->dev->dev, "Device Reported %d serial ports "
2978                          "vs. core thinking we have %d ports, email "
2979                          "greg@kroah.com this information.\n",
2980                          edge_serial->product_info.NumPorts,
2981                          serial->num_ports);
2982         }
2983
2984         dbg("%s - time 1 %ld", __func__, jiffies);
2985
2986         /* If not an EPiC device */
2987         if (!edge_serial->is_epic) {
2988                 /* now load the application firmware into this device */
2989                 load_application_firmware(edge_serial);
2990
2991                 dbg("%s - time 2 %ld", __func__, jiffies);
2992
2993                 /* Check current Edgeport EEPROM and update if necessary */
2994                 update_edgeport_E2PROM(edge_serial);
2995
2996                 dbg("%s - time 3 %ld", __func__, jiffies);
2997
2998                 /* set the configuration to use #1 */
2999 /*              dbg("set_configuration 1"); */
3000 /*              usb_set_configuration (dev, 1); */
3001         }
3002         dbg("  FirmwareMajorVersion  %d.%d.%d",
3003             edge_serial->product_info.FirmwareMajorVersion,
3004             edge_serial->product_info.FirmwareMinorVersion,
3005             le16_to_cpu(edge_serial->product_info.FirmwareBuildNumber));
3006
3007         /* we set up the pointers to the endpoints in the edge_open function,
3008          * as the structures aren't created yet. */
3009
3010         /* set up our port private structures */
3011         for (i = 0; i < serial->num_ports; ++i) {
3012                 edge_port = kzalloc(sizeof(struct edgeport_port), GFP_KERNEL);
3013                 if (edge_port == NULL) {
3014                         dev_err(&serial->dev->dev, "%s - Out of memory\n",
3015                                                                    __func__);
3016                         for (j = 0; j < i; ++j) {
3017                                 kfree(usb_get_serial_port_data(serial->port[j]));
3018                                 usb_set_serial_port_data(serial->port[j],
3019                                                                         NULL);
3020                         }
3021                         usb_set_serial_data(serial, NULL);
3022                         kfree(edge_serial);
3023                         return -ENOMEM;
3024                 }
3025                 spin_lock_init(&edge_port->ep_lock);
3026                 edge_port->port = serial->port[i];
3027                 usb_set_serial_port_data(serial->port[i], edge_port);
3028         }
3029
3030         response = 0;
3031
3032         if (edge_serial->is_epic) {
3033                 /* EPIC thing, set up our interrupt polling now and our read
3034                  * urb, so that the device knows it really is connected. */
3035                 interrupt_in_found = bulk_in_found = bulk_out_found = false;
3036                 for (i = 0; i < serial->interface->altsetting[0]
3037                                                 .desc.bNumEndpoints; ++i) {
3038                         struct usb_endpoint_descriptor *endpoint;
3039                         int buffer_size;
3040
3041                         endpoint = &serial->interface->altsetting[0].
3042                                                         endpoint[i].desc;
3043                         buffer_size = usb_endpoint_maxp(endpoint);
3044                         if (!interrupt_in_found &&
3045                             (usb_endpoint_is_int_in(endpoint))) {
3046                                 /* we found a interrupt in endpoint */
3047                                 dbg("found interrupt in");
3048
3049                                 /* not set up yet, so do it now */
3050                                 edge_serial->interrupt_read_urb =
3051                                                 usb_alloc_urb(0, GFP_KERNEL);
3052                                 if (!edge_serial->interrupt_read_urb) {
3053                                         dev_err(&dev->dev, "out of memory\n");
3054                                         return -ENOMEM;
3055                                 }
3056                                 edge_serial->interrupt_in_buffer =
3057                                         kmalloc(buffer_size, GFP_KERNEL);
3058                                 if (!edge_serial->interrupt_in_buffer) {
3059                                         dev_err(&dev->dev, "out of memory\n");
3060                                         usb_free_urb(edge_serial->interrupt_read_urb);
3061                                         return -ENOMEM;
3062                                 }
3063                                 edge_serial->interrupt_in_endpoint =
3064                                                 endpoint->bEndpointAddress;
3065
3066                                 /* set up our interrupt urb */
3067                                 usb_fill_int_urb(
3068                                         edge_serial->interrupt_read_urb,
3069                                         dev,
3070                                         usb_rcvintpipe(dev,
3071                                                 endpoint->bEndpointAddress),
3072                                         edge_serial->interrupt_in_buffer,
3073                                         buffer_size,
3074                                         edge_interrupt_callback,
3075                                         edge_serial,
3076                                         endpoint->bInterval);
3077
3078                                 interrupt_in_found = true;
3079                         }
3080
3081                         if (!bulk_in_found &&
3082                                 (usb_endpoint_is_bulk_in(endpoint))) {
3083                                 /* we found a bulk in endpoint */
3084                                 dbg("found bulk in");
3085
3086                                 /* not set up yet, so do it now */
3087                                 edge_serial->read_urb =
3088                                                 usb_alloc_urb(0, GFP_KERNEL);
3089                                 if (!edge_serial->read_urb) {
3090                                         dev_err(&dev->dev, "out of memory\n");
3091                                         return -ENOMEM;
3092                                 }
3093                                 edge_serial->bulk_in_buffer =
3094                                         kmalloc(buffer_size, GFP_KERNEL);
3095                                 if (!edge_serial->bulk_in_buffer) {
3096                                         dev_err(&dev->dev, "out of memory\n");
3097                                         usb_free_urb(edge_serial->read_urb);
3098                                         return -ENOMEM;
3099                                 }
3100                                 edge_serial->bulk_in_endpoint =
3101                                                 endpoint->bEndpointAddress;
3102
3103                                 /* set up our bulk in urb */
3104                                 usb_fill_bulk_urb(edge_serial->read_urb, dev,
3105                                         usb_rcvbulkpipe(dev,
3106                                                 endpoint->bEndpointAddress),
3107                                         edge_serial->bulk_in_buffer,
3108                                         usb_endpoint_maxp(endpoint),
3109                                         edge_bulk_in_callback,
3110                                         edge_serial);
3111                                 bulk_in_found = true;
3112                         }
3113
3114                         if (!bulk_out_found &&
3115                             (usb_endpoint_is_bulk_out(endpoint))) {
3116                                 /* we found a bulk out endpoint */
3117                                 dbg("found bulk out");
3118                                 edge_serial->bulk_out_endpoint =
3119                                                 endpoint->bEndpointAddress;
3120                                 bulk_out_found = true;
3121                         }
3122                 }
3123
3124                 if (!interrupt_in_found || !bulk_in_found || !bulk_out_found) {
3125                         dev_err(&dev->dev, "Error - the proper endpoints "
3126                                 "were not found!\n");
3127                         return -ENODEV;
3128                 }
3129
3130                 /* start interrupt read for this edgeport this interrupt will
3131                  * continue as long as the edgeport is connected */
3132                 response = usb_submit_urb(edge_serial->interrupt_read_urb,
3133                                                                 GFP_KERNEL);
3134                 if (response)
3135                         dev_err(&dev->dev,
3136                                 "%s - Error %d submitting control urb\n",
3137                                 __func__, response);
3138         }
3139         return response;
3140 }
3141
3142
3143 /****************************************************************************
3144  * edge_disconnect
3145  *      This function is called whenever the device is removed from the usb bus.
3146  ****************************************************************************/
3147 static void edge_disconnect(struct usb_serial *serial)
3148 {
3149         struct edgeport_serial *edge_serial = usb_get_serial_data(serial);
3150
3151         dbg("%s", __func__);
3152
3153         /* stop reads and writes on all ports */
3154         /* free up our endpoint stuff */
3155         if (edge_serial->is_epic) {
3156                 usb_kill_urb(edge_serial->interrupt_read_urb);
3157                 usb_free_urb(edge_serial->interrupt_read_urb);
3158                 kfree(edge_serial->interrupt_in_buffer);
3159
3160                 usb_kill_urb(edge_serial->read_urb);
3161                 usb_free_urb(edge_serial->read_urb);
3162                 kfree(edge_serial->bulk_in_buffer);
3163         }
3164 }
3165
3166
3167 /****************************************************************************
3168  * edge_release
3169  *      This function is called when the device structure is deallocated.
3170  ****************************************************************************/
3171 static void edge_release(struct usb_serial *serial)
3172 {
3173         struct edgeport_serial *edge_serial = usb_get_serial_data(serial);
3174         int i;
3175
3176         dbg("%s", __func__);
3177
3178         for (i = 0; i < serial->num_ports; ++i)
3179                 kfree(usb_get_serial_port_data(serial->port[i]));
3180
3181         kfree(edge_serial);
3182 }
3183
3184 module_usb_serial_driver(serial_drivers, id_table_combined);
3185
3186 MODULE_AUTHOR(DRIVER_AUTHOR);
3187 MODULE_DESCRIPTION(DRIVER_DESC);
3188 MODULE_LICENSE("GPL");
3189 MODULE_FIRMWARE("edgeport/boot.fw");
3190 MODULE_FIRMWARE("edgeport/boot2.fw");
3191 MODULE_FIRMWARE("edgeport/down.fw");
3192 MODULE_FIRMWARE("edgeport/down2.fw");
3193
3194 module_param(debug, bool, S_IRUGO | S_IWUSR);
3195 MODULE_PARM_DESC(debug, "Debug enabled or not");