LXR linux/drivers/usb/serial/io

   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 */
  68enum 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 */
  81struct 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 */
  90struct 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 */
 125struct 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 */
 160struct 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
 171static 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 */
 194static int debug;
 195
 196static atomic_t CmdUrbs;        /* Number of outstanding Command Write Urbs */
 197
 198
 199/* local function prototypes */
 200
 201/* function prototypes for all URB callbacks */
 202static void edge_interrupt_callback(struct urb *urb);
 203static void edge_bulk_in_callback(struct urb *urb);
 204static void edge_bulk_out_data_callback(struct urb *urb);
 205static void edge_bulk_out_cmd_callback(struct urb *urb);
 206
 207/* function prototypes for the usbserial callbacks */
 208static int edge_open(struct tty_struct *tty, struct usb_serial_port *port);
 209static void edge_close(struct usb_serial_port *port);
 210static int edge_write(struct tty_struct *tty, struct usb_serial_port *port,
 211                                        const unsigned char *buf, int count);
 212static int edge_write_room(struct tty_struct *tty);
 213static int edge_chars_in_buffer(struct tty_struct *tty);
 214static void edge_throttle(struct tty_struct *tty);
 215static void edge_unthrottle(struct tty_struct *tty);
 216static void edge_set_termios(struct tty_struct *tty,
 217                                        struct usb_serial_port *port,
 218                                        struct ktermios *old_termios);
 219static int  edge_ioctl(struct tty_struct *tty, struct file *file,
 220                                        unsigned int cmd, unsigned long arg);
 221static void edge_break(struct tty_struct *tty, int break_state);
 222static int  edge_tiocmget(struct tty_struct *tty, struct file *file);
 223static int  edge_tiocmset(struct tty_struct *tty, struct file *file,
 224                                        unsigned int set, unsigned int clear);
 225static int  edge_get_icount(struct tty_struct *tty,
 226                                struct serial_icounter_struct *icount);
 227static int  edge_startup(struct usb_serial *serial);
 228static void edge_disconnect(struct usb_serial *serial);
 229static void edge_release(struct usb_serial *serial);
 230
 231#include "io_tables.h"  /* all of the devices that this driver supports */
 232
 233/* function prototypes for all of our local functions */
 234
 235static void  process_rcvd_data(struct edgeport_serial *edge_serial,
 236                                unsigned char *buffer, __u16 bufferLength);
 237static void process_rcvd_status(struct edgeport_serial *edge_serial,
 238                                __u8 byte2, __u8 byte3);
 239static void edge_tty_recv(struct device *dev, struct tty_struct *tty,
 240                                unsigned char *data, int length);
 241static void handle_new_msr(struct edgeport_port *edge_port, __u8 newMsr);
 242static void handle_new_lsr(struct edgeport_port *edge_port, __u8 lsrData,
 243                                __u8 lsr, __u8 data);
 244static int  send_iosp_ext_cmd(struct edgeport_port *edge_port, __u8 command,
 245                                __u8 param);
 246static int  calc_baud_rate_divisor(int baud_rate, int *divisor);
 247static int  send_cmd_write_baud_rate(struct edgeport_port *edge_port,
 248                                int baudRate);
 249static void change_port_settings(struct tty_struct *tty,
 250                                struct edgeport_port *edge_port,
 251                                struct ktermios *old_termios);
 252static int  send_cmd_write_uart_register(struct edgeport_port *edge_port,
 253                                __u8 regNum, __u8 regValue);
 254static int  write_cmd_usb(struct edgeport_port *edge_port,
 255                                unsigned char *buffer, int writeLength);
 256static void send_more_port_data(struct edgeport_serial *edge_serial,
 257                                struct edgeport_port *edge_port);
 258
 259static int sram_write(struct usb_serial *serial, __u16 extAddr, __u16 addr,
 260                                        __u16 length, const __u8 *data);
 261static int rom_read(struct usb_serial *serial, __u16 extAddr, __u16 addr,
 262                                                __u16 length, __u8 *data);
 263static int rom_write(struct usb_serial *serial, __u16 extAddr, __u16 addr,
 264                                        __u16 length, const __u8 *data);
 265static void get_manufacturing_desc(struct edgeport_serial *edge_serial);
 266static void get_boot_desc(struct edgeport_serial *edge_serial);
 267static void load_application_firmware(struct edgeport_serial *edge_serial);
 268
 269static void unicode_to_ascii(char *string, int buflen,
 270                                __le16 *unicode, int unicode_size);
 271
 272
 273/* ************************************************************************ */
 274/* ************************************************************************ */
 275/* ************************************************************************ */
 276/* ************************************************************************ */
 277
 278/************************************************************************
 279 *                                                                      *
 280 * update_edgeport_E2PROM()     Compare current versions of             *
 281 *                              Boot ROM and Manufacture                *
 282 *                              Descriptors with versions               *
 283 *                              embedded in this driver                 *
 284 *                                                                      *
 285 ************************************************************************/
 286static void update_edgeport_E2PROM(struct edgeport_serial *edge_serial)
 287{
 288        __u32 BootCurVer;
 289        __u32 BootNewVer;
 290        __u8 BootMajorVersion;
 291        __u8 BootMinorVersion;
 292        __u16 BootBuildNumber;
 293        __u32 Bootaddr;
 294        const struct ihex_binrec *rec;
 295        const struct firmware *fw;
 296        const char *fw_name;
 297        int response;
 298
 299        switch (edge_serial->product_info.iDownloadFile) {
 300        case EDGE_DOWNLOAD_FILE_I930:
 301                fw_name = "edgeport/boot.fw";
 302                break;
 303        case EDGE_DOWNLOAD_FILE_80251:
 304                fw_name = "edgeport/boot2.fw";
 305                break;
 306        default:
 307                return;
 308        }
 309
 310        response = request_ihex_firmware(&fw, fw_name,
 311                                         &edge_serial->serial->dev->dev);
 312        if (response) {
 313                printk(KERN_ERR "Failed to load image \"%s\" err %d\n",
 314                       fw_name, response);
 315                return;
 316        }
 317
 318        rec = (const struct ihex_binrec *)fw->data;
 319        BootMajorVersion = rec->data[0];
 320        BootMinorVersion = rec->data[1];
 321        BootBuildNumber = (rec->data[2] << 8) | rec->data[3];
 322
 323        /* Check Boot Image Version */
 324        BootCurVer = (edge_serial->boot_descriptor.MajorVersion << 24) +
 325                     (edge_serial->boot_descriptor.MinorVersion << 16) +
 326                      le16_to_cpu(edge_serial->boot_descriptor.BuildNumber);
 327
 328        BootNewVer = (BootMajorVersion << 24) +
 329                     (BootMinorVersion << 16) +
 330                      BootBuildNumber;
 331
 332        dbg("Current Boot Image version %d.%d.%d",
 333            edge_serial->boot_descriptor.MajorVersion,
 334            edge_serial->boot_descriptor.MinorVersion,
 335            le16_to_cpu(edge_serial->boot_descriptor.BuildNumber));
 336
 337
 338        if (BootNewVer > BootCurVer) {
 339                dbg("**Update Boot Image from %d.%d.%d to %d.%d.%d",
 340                    edge_serial->boot_descriptor.MajorVersion,
 341                    edge_serial->boot_descriptor.MinorVersion,
 342                    le16_to_cpu(edge_serial->boot_descriptor.BuildNumber),
 343                    BootMajorVersion, BootMinorVersion, BootBuildNumber);
 344
 345                dbg("Downloading new Boot Image");
 346
 347                for (rec = ihex_next_binrec(rec); rec;
 348                     rec = ihex_next_binrec(rec)) {
 349                        Bootaddr = be32_to_cpu(rec->addr);
 350                        response = rom_write(edge_serial->serial,
 351                                             Bootaddr >> 16,
 352                                             Bootaddr & 0xFFFF,
 353                                             be16_to_cpu(rec->len),
 354                                             &rec->data[0]);
 355                        if (response < 0) {
 356                                dev_err(&edge_serial->serial->dev->dev,
 357                                        "rom_write failed (%x, %x, %d)\n",
 358                                        Bootaddr >> 16, Bootaddr & 0xFFFF,
 359                                        be16_to_cpu(rec->len));
 360                                break;
 361                        }
 362                }
 363        } else {
 364                dbg("Boot Image -- already up to date");
 365        }
 366        release_firmware(fw);
 367}
 368
 369#if 0
 370/************************************************************************
 371 *
 372 *  Get string descriptor from device
 373 *
 374 ************************************************************************/
 375static int get_string_desc(struct usb_device *dev, int Id,
 376                                struct usb_string_descriptor **pRetDesc)
 377{
 378        struct usb_string_descriptor StringDesc;
 379        struct usb_string_descriptor *pStringDesc;
 380
 381        dbg("%s - USB String ID = %d", __func__, Id);
 382
 383        if (!usb_get_descriptor(dev, USB_DT_STRING, Id, &StringDesc,
 384                                                sizeof(StringDesc)))
 385                return 0;
 386
 387        pStringDesc = kmalloc(StringDesc.bLength, GFP_KERNEL);
 388        if (!pStringDesc)
 389                return -1;
 390
 391        if (!usb_get_descriptor(dev, USB_DT_STRING, Id, pStringDesc,
 392                                                        StringDesc.bLength)) {
 393                kfree(pStringDesc);
 394                return -1;
 395        }
 396
 397        *pRetDesc = pStringDesc;
 398        return 0;
 399}
 400#endif
 401
 402static void dump_product_info(struct edgeport_product_info *product_info)
 403{
 404        /* Dump Product Info structure */
 405        dbg("**Product Information:");
 406        dbg("  ProductId             %x", product_info->ProductId);
 407        dbg("  NumPorts              %d", product_info->NumPorts);
 408        dbg("  ProdInfoVer           %d", product_info->ProdInfoVer);
 409        dbg("  IsServer              %d", product_info->IsServer);
 410        dbg("  IsRS232               %d", product_info->IsRS232);
 411        dbg("  IsRS422               %d", product_info->IsRS422);
 412        dbg("  IsRS485               %d", product_info->IsRS485);
 413        dbg("  RomSize               %d", product_info->RomSize);
 414        dbg("  RamSize               %d", product_info->RamSize);
 415        dbg("  CpuRev                %x", product_info->CpuRev);
 416        dbg("  BoardRev              %x", product_info->BoardRev);
 417        dbg("  BootMajorVersion      %d.%d.%d", product_info->BootMajorVersion,
 418            product_info->BootMinorVersion,
 419            le16_to_cpu(product_info->BootBuildNumber));
 420        dbg("  FirmwareMajorVersion  %d.%d.%d",
 421                        product_info->FirmwareMajorVersion,
 422                        product_info->FirmwareMinorVersion,
 423                        le16_to_cpu(product_info->FirmwareBuildNumber));
 424        dbg("  ManufactureDescDate   %d/%d/%d",
 425                        product_info->ManufactureDescDate[0],
 426                        product_info->ManufactureDescDate[1],
 427                        product_info->ManufactureDescDate[2]+1900);
 428        dbg("  iDownloadFile         0x%x", product_info->iDownloadFile);
 429        dbg("  EpicVer               %d", product_info->EpicVer);
 430}
 431
 432static void get_product_info(struct edgeport_serial *edge_serial)
 433{
 434        struct edgeport_product_info *product_info = &edge_serial->product_info;
 435
 436        memset(product_info, 0, sizeof(struct edgeport_product_info));
 437
 438        product_info->ProductId = (__u16)(le16_to_cpu(edge_serial->serial->dev->descriptor.idProduct) & ~ION_DEVICE_ID_80251_NETCHIP);
 439        product_info->NumPorts = edge_serial->manuf_descriptor.NumPorts;
 440        product_info->ProdInfoVer = 0;
 441
 442        product_info->RomSize = edge_serial->manuf_descriptor.RomSize;
 443        product_info->RamSize = edge_serial->manuf_descriptor.RamSize;
 444        product_info->CpuRev = edge_serial->manuf_descriptor.CpuRev;
 445        product_info->BoardRev = edge_serial->manuf_descriptor.BoardRev;
 446
 447        product_info->BootMajorVersion =
 448                                edge_serial->boot_descriptor.MajorVersion;
 449        product_info->BootMinorVersion =
 450                                edge_serial->boot_descriptor.MinorVersion;
 451        product_info->BootBuildNumber =
 452                                edge_serial->boot_descriptor.BuildNumber;
 453
 454        memcpy(product_info->ManufactureDescDate,
 455                        edge_serial->manuf_descriptor.DescDate,
 456                        sizeof(edge_serial->manuf_descriptor.DescDate));
 457
 458        /* check if this is 2nd generation hardware */
 459        if (le16_to_cpu(edge_serial->serial->dev->descriptor.idProduct)
 460                                            & ION_DEVICE_ID_80251_NETCHIP)
 461                product_info->iDownloadFile = EDGE_DOWNLOAD_FILE_80251;
 462        else
 463                product_info->iDownloadFile = EDGE_DOWNLOAD_FILE_I930;
 464 
 465        /* Determine Product type and set appropriate flags */
 466        switch (DEVICE_ID_FROM_USB_PRODUCT_ID(product_info->ProductId)) {
 467        case ION_DEVICE_ID_EDGEPORT_COMPATIBLE:
 468        case ION_DEVICE_ID_EDGEPORT_4T:
 469        case ION_DEVICE_ID_EDGEPORT_4:
 470        case ION_DEVICE_ID_EDGEPORT_2:
 471        case ION_DEVICE_ID_EDGEPORT_8_DUAL_CPU:
 472        case ION_DEVICE_ID_EDGEPORT_8:
 473        case ION_DEVICE_ID_EDGEPORT_421:
 474        case ION_DEVICE_ID_EDGEPORT_21:
 475        case ION_DEVICE_ID_EDGEPORT_2_DIN:
 476        case ION_DEVICE_ID_EDGEPORT_4_DIN:
 477        case ION_DEVICE_ID_EDGEPORT_16_DUAL_CPU:
 478                product_info->IsRS232 = 1;
 479                break;
 480
 481        case ION_DEVICE_ID_EDGEPORT_2I: /* Edgeport/2 RS422/RS485 */
 482                product_info->IsRS422 = 1;
 483                product_info->IsRS485 = 1;
 484                break;
 485
 486        case ION_DEVICE_ID_EDGEPORT_8I: /* Edgeport/4 RS422 */
 487        case ION_DEVICE_ID_EDGEPORT_4I: /* Edgeport/4 RS422 */
 488                product_info->IsRS422 = 1;
 489                break;
 490        }
 491
 492        dump_product_info(product_info);
 493}
 494
 495static int get_epic_descriptor(struct edgeport_serial *ep)
 496{
 497        int result;
 498        struct usb_serial *serial = ep->serial;
 499        struct edgeport_product_info *product_info = &ep->product_info;
 500        struct edge_compatibility_descriptor *epic = &ep->epic_descriptor;
 501        struct edge_compatibility_bits *bits;
 502
 503        ep->is_epic = 0;
 504        result = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
 505                                 USB_REQUEST_ION_GET_EPIC_DESC,
 506                                 0xC0, 0x00, 0x00,
 507                                 &ep->epic_descriptor,
 508                                 sizeof(struct edge_compatibility_descriptor),
 509                                 300);
 510
 511        dbg("%s result = %d", __func__, result);
 512
 513        if (result > 0) {
 514                ep->is_epic = 1;
 515                memset(product_info, 0, sizeof(struct edgeport_product_info));
 516
 517                product_info->NumPorts = epic->NumPorts;
 518                product_info->ProdInfoVer = 0;
 519                product_info->FirmwareMajorVersion = epic->MajorVersion;
 520                product_info->FirmwareMinorVersion = epic->MinorVersion;
 521                product_info->FirmwareBuildNumber = epic->BuildNumber;
 522                product_info->iDownloadFile = epic->iDownloadFile;
 523                product_info->EpicVer = epic->EpicVer;
 524                product_info->Epic = epic->Supports;
 525                product_info->ProductId = ION_DEVICE_ID_EDGEPORT_COMPATIBLE;
 526                dump_product_info(product_info);
 527
 528                bits = &ep->epic_descriptor.Supports;
 529                dbg("**EPIC descriptor:");
 530                dbg("  VendEnableSuspend: %s", bits->VendEnableSuspend  ? "TRUE": "FALSE");
 531                dbg("  IOSPOpen         : %s", bits->IOSPOpen           ? "TRUE": "FALSE");
 532                dbg("  IOSPClose        : %s", bits->IOSPClose          ? "TRUE": "FALSE");
 533                dbg("  IOSPChase        : %s", bits->IOSPChase          ? "TRUE": "FALSE");
 534                dbg("  IOSPSetRxFlow    : %s", bits->IOSPSetRxFlow      ? "TRUE": "FALSE");
 535                dbg("  IOSPSetTxFlow    : %s", bits->IOSPSetTxFlow      ? "TRUE": "FALSE");
 536                dbg("  IOSPSetXChar     : %s", bits->IOSPSetXChar       ? "TRUE": "FALSE");
 537                dbg("  IOSPRxCheck      : %s", bits->IOSPRxCheck        ? "TRUE": "FALSE");
 538                dbg("  IOSPSetClrBreak  : %s", bits->IOSPSetClrBreak    ? "TRUE": "FALSE");
 539                dbg("  IOSPWriteMCR     : %s", bits->IOSPWriteMCR       ? "TRUE": "FALSE");
 540                dbg("  IOSPWriteLCR     : %s", bits->IOSPWriteLCR       ? "TRUE": "FALSE");
 541                dbg("  IOSPSetBaudRate  : %s", bits->IOSPSetBaudRate    ? "TRUE": "FALSE");
 542                dbg("  TrueEdgeport     : %s", bits->TrueEdgeport       ? "TRUE": "FALSE");
 543        }
 544
 545        return result;
 546}
 547
 548
 549/************************************************************************/
 550/************************************************************************/
 551/*            U S B  C A L L B A C K   F U N C T I O N S                */
 552/*            U S B  C A L L B A C K   F U N C T I O N S                */
 553/************************************************************************/
 554/************************************************************************/
 555
 556/*****************************************************************************
 557 * edge_interrupt_callback
 558 *      this is the callback function for when we have received data on the
 559 *      interrupt endpoint.
 560 *****************************************************************************/
 561static void edge_interrupt_callback(struct urb *urb)
 562{
 563        struct edgeport_serial  *edge_serial = urb->context;
 564        struct edgeport_port *edge_port;
 565        struct usb_serial_port *port;
 566        struct tty_struct *tty;
 567        unsigned char *data = urb->transfer_buffer;
 568        int length = urb->actual_length;
 569        int bytes_avail;
 570        int position;
 571        int txCredits;
 572        int portNumber;
 573        int result;
 574        int status = urb->status;
 575
 576        dbg("%s", __func__);
 577
 578        switch (status) {
 579        case 0:
 580                /* success */
 581                break;
 582        case -ECONNRESET:
 583        case -ENOENT:
 584        case -ESHUTDOWN:
 585                /* this urb is terminated, clean up */
 586                dbg("%s - urb shutting down with status: %d",
 587                                                __func__, status);
 588                return;
 589        default:
 590                dbg("%s - nonzero urb status received: %d", __func__, status);
 591                goto exit;
 592        }
 593
 594        /* process this interrupt-read even if there are no ports open */
 595        if (length) {
 596                usb_serial_debug_data(debug, &edge_serial->serial->dev->dev,
 597                                                __func__, length, data);
 598
 599                if (length > 1) {
 600                        bytes_avail = data[0] | (data[1] << 8);
 601                        if (bytes_avail) {
 602                                spin_lock(&edge_serial->es_lock);
 603                                edge_serial->rxBytesAvail += bytes_avail;
 604                                dbg("%s - bytes_avail=%d, rxBytesAvail=%d, read_in_progress=%d", __func__, bytes_avail, edge_serial->rxBytesAvail, edge_serial->read_in_progress);
 605
 606                                if (edge_serial->rxBytesAvail > 0 &&
 607                                    !edge_serial->read_in_progress) {
 608                                        dbg("%s - posting a read", __func__);
 609                                        edge_serial->read_in_progress = true;
 610
 611                                        /* we have pending bytes on the
 612                                           bulk in pipe, send a request */
 613                                        edge_serial->read_urb->dev = edge_serial->serial->dev;
 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
 659exit:
 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 *****************************************************************************/
 673static 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                edge_serial->read_urb->dev = edge_serial->serial->dev;
 715                retval = usb_submit_urb(edge_serial->read_urb, GFP_ATOMIC);
 716                if (retval) {
 717                        dev_err(&urb->dev->dev,
 718                                "%s - usb_submit_urb(read bulk) failed, "
 719                                "retval = %d\n", __func__, retval);
 720                        edge_serial->read_in_progress = false;
 721                }
 722        } else {
 723                edge_serial->read_in_progress = false;
 724        }
 725
 726        spin_unlock(&edge_serial->es_lock);
 727}
 728
 729
 730/*****************************************************************************
 731 * edge_bulk_out_data_callback
 732 *      this is the callback function for when we have finished sending
 733 *      serial data on the bulk out endpoint.
 734 *****************************************************************************/
 735static void edge_bulk_out_data_callback(struct urb *urb)
 736{
 737        struct edgeport_port *edge_port = urb->context;
 738        struct tty_struct *tty;
 739        int status = urb->status;
 740
 741        dbg("%s", __func__);
 742
 743        if (status) {
 744                dbg("%s - nonzero write bulk status received: %d",
 745                    __func__, status);
 746        }
 747
 748        tty = tty_port_tty_get(&edge_port->port->port);
 749
 750        if (tty && edge_port->open) {
 751                /* let the tty driver wakeup if it has a special
 752                   write_wakeup function */
 753                tty_wakeup(tty);
 754        }
 755        tty_kref_put(tty);
 756
 757        /* Release the Write URB */
 758        edge_port->write_in_progress = false;
 759
 760        /* Check if more data needs to be sent */
 761        send_more_port_data((struct edgeport_serial *)
 762                (usb_get_serial_data(edge_port->port->serial)), edge_port);
 763}
 764
 765
 766/*****************************************************************************
 767 * BulkOutCmdCallback
 768 *      this is the callback function for when we have finished sending a
 769 *      command on the bulk out endpoint.
 770 *****************************************************************************/
 771static void edge_bulk_out_cmd_callback(struct urb *urb)
 772{
 773        struct edgeport_port *edge_port = urb->context;
 774        struct tty_struct *tty;
 775        int status = urb->status;
 776
 777        dbg("%s", __func__);
 778
 779        atomic_dec(&CmdUrbs);
 780        dbg("%s - FREE URB %p (outstanding %d)", __func__,
 781                                        urb, atomic_read(&CmdUrbs));
 782
 783
 784        /* clean up the transfer buffer */
 785        kfree(urb->transfer_buffer);
 786
 787        /* Free the command urb */
 788        usb_free_urb(urb);
 789
 790        if (status) {
 791                dbg("%s - nonzero write bulk status received: %d",
 792                                                        __func__, status);
 793                return;
 794        }
 795
 796        /* Get pointer to tty */
 797        tty = tty_port_tty_get(&edge_port->port->port);
 798
 799        /* tell the tty driver that something has changed */
 800        if (tty && edge_port->open)
 801                tty_wakeup(tty);
 802        tty_kref_put(tty);
 803
 804        /* we have completed the command */
 805        edge_port->commandPending = false;
 806        wake_up(&edge_port->wait_command);
 807}
 808
 809
 810/*****************************************************************************
 811 * Driver tty interface functions
 812 *****************************************************************************/
 813
 814/*****************************************************************************
 815 * SerialOpen
 816 *      this function is called by the tty driver when a port is opened
 817 *      If successful, we return 0
 818 *      Otherwise we return a negative error number.
 819 *****************************************************************************/
 820static int edge_open(struct tty_struct *tty, struct usb_serial_port *port)
 821{
 822        struct edgeport_port *edge_port = usb_get_serial_port_data(port);
 823        struct usb_serial *serial;
 824        struct edgeport_serial *edge_serial;
 825        int response;
 826
 827        dbg("%s - port %d", __func__, port->number);
 828
 829        if (edge_port == NULL)
 830                return -ENODEV;
 831
 832        /* see if we've set up our endpoint info yet (can't set it up
 833           in edge_startup as the structures were not set up at that time.) */
 834        serial = port->serial;
 835        edge_serial = usb_get_serial_data(serial);
 836        if (edge_serial == NULL)
 837                return -ENODEV;
 838        if (edge_serial->interrupt_in_buffer == NULL) {
 839                struct usb_serial_port *port0 = serial->port[0];
 840
 841                /* not set up yet, so do it now */
 842                edge_serial->interrupt_in_buffer =
 843                                        port0->interrupt_in_buffer;
 844                edge_serial->interrupt_in_endpoint =
 845                                        port0->interrupt_in_endpointAddress;
 846                edge_serial->interrupt_read_urb = port0->interrupt_in_urb;
 847                edge_serial->bulk_in_buffer = port0->bulk_in_buffer;
 848                edge_serial->bulk_in_endpoint =
 849                                        port0->bulk_in_endpointAddress;
 850                edge_serial->read_urb = port0->read_urb;
 851                edge_serial->bulk_out_endpoint =
 852                                        port0->bulk_out_endpointAddress;
 853
 854                /* set up our interrupt urb */
 855                usb_fill_int_urb(edge_serial->interrupt_read_urb,
 856                      serial->dev,
 857                      usb_rcvintpipe(serial->dev,
 858                                port0->interrupt_in_endpointAddress),
 859                      port0->interrupt_in_buffer,
 860                      edge_serial->interrupt_read_urb->transfer_buffer_length,
 861                      edge_interrupt_callback, edge_serial,
 862                      edge_serial->interrupt_read_urb->interval);
 863
 864                /* set up our bulk in urb */
 865                usb_fill_bulk_urb(edge_serial->read_urb, serial->dev,
 866                        usb_rcvbulkpipe(serial->dev,
 867                                port0->bulk_in_endpointAddress),
 868                        port0->bulk_in_buffer,
 869                        edge_serial->read_urb->transfer_buffer_length,
 870                        edge_bulk_in_callback, edge_serial);
 871                edge_serial->read_in_progress = false;
 872
 873                /* start interrupt read for this edgeport
 874                 * this interrupt will continue as long
 875                 * as the edgeport is connected */
 876                response = usb_submit_urb(edge_serial->interrupt_read_urb,
 877                                                                GFP_KERNEL);
 878                if (response) {
 879                        dev_err(&port->dev,
 880                                "%s - Error %d submitting control urb\n",
 881                                                        __func__, response);
 882                }
 883        }
 884
 885        /* initialize our wait queues */
 886        init_waitqueue_head(&edge_port->wait_open);
 887        init_waitqueue_head(&edge_port->wait_chase);
 888        init_waitqueue_head(&edge_port->delta_msr_wait);
 889        init_waitqueue_head(&edge_port->wait_command);
 890
 891        /* initialize our icount structure */
 892        memset(&(edge_port->icount), 0x00, sizeof(edge_port->icount));
 893
 894        /* initialize our port settings */
 895        edge_port->txCredits = 0;       /* Can't send any data yet */
 896        /* Must always set this bit to enable ints! */
 897        edge_port->shadowMCR = MCR_MASTER_IE;
 898        edge_port->chaseResponsePending = false;
 899
 900        /* send a open port command */
 901        edge_port->openPending = true;
 902        edge_port->open        = false;
 903        response = send_iosp_ext_cmd(edge_port, IOSP_CMD_OPEN_PORT, 0);
 904
 905        if (response < 0) {
 906                dev_err(&port->dev, "%s - error sending open port command\n",
 907                                                                __func__);
 908                edge_port->openPending = false;
 909                return -ENODEV;
 910        }
 911
 912        /* now wait for the port to be completely opened */
 913        wait_event_timeout(edge_port->wait_open, !edge_port->openPending,
 914                                                                OPEN_TIMEOUT);
 915
 916        if (!edge_port->open) {
 917                /* open timed out */
 918                dbg("%s - open timedout", __func__);
 919                edge_port->openPending = false;
 920                return -ENODEV;
 921        }
 922
 923        /* create the txfifo */
 924        edge_port->txfifo.head  = 0;
 925        edge_port->txfifo.tail  = 0;
 926        edge_port->txfifo.count = 0;
 927        edge_port->txfifo.size  = edge_port->maxTxCredits;
 928        edge_port->txfifo.fifo  = kmalloc(edge_port->maxTxCredits, GFP_KERNEL);
 929
 930        if (!edge_port->txfifo.fifo) {
 931                dbg("%s - no memory", __func__);
 932                edge_close(port);
 933                return -ENOMEM;
 934        }
 935
 936        /* Allocate a URB for the write */
 937        edge_port->write_urb = usb_alloc_urb(0, GFP_KERNEL);
 938        edge_port->write_in_progress = false;
 939
 940        if (!edge_port->write_urb) {
 941                dbg("%s - no memory", __func__);
 942                edge_close(port);
 943                return -ENOMEM;
 944        }
 945
 946        dbg("%s(%d) - Initialize TX fifo to %d bytes",
 947                        __func__, port->number, edge_port->maxTxCredits);
 948
 949        dbg("%s exited", __func__);
 950
 951        return 0;
 952}
 953
 954
 955/************************************************************************
 956 *
 957 * block_until_chase_response
 958 *
 959 *      This function will block the close until one of the following:
 960 *              1. Response to our Chase comes from Edgeport
 961 *              2. A timeout of 10 seconds without activity has expired
 962 *                 (1K of Edgeport data @ 2400 baud ==> 4 sec to empty)
 963 *
 964 ************************************************************************/
 965static void block_until_chase_response(struct edgeport_port *edge_port)
 966{
 967        DEFINE_WAIT(wait);
 968        __u16 lastCredits;
 969        int timeout = 1*HZ;
 970        int loop = 10;
 971
 972        while (1) {
 973                /* Save Last credits */
 974                lastCredits = edge_port->txCredits;
 975
 976                /* Did we get our Chase response */
 977                if (!edge_port->chaseResponsePending) {
 978                        dbg("%s - Got Chase Response", __func__);
 979
 980                        /* did we get all of our credit back? */
 981                        if (edge_port->txCredits == edge_port->maxTxCredits) {
 982                                dbg("%s - Got all credits", __func__);
 983                                return;
 984                        }
 985                }
 986
 987                /* Block the thread for a while */
 988                prepare_to_wait(&edge_port->wait_chase, &wait,
 989                                                TASK_UNINTERRUPTIBLE);
 990                schedule_timeout(timeout);
 991                finish_wait(&edge_port->wait_chase, &wait);
 992
 993                if (lastCredits == edge_port->txCredits) {
 994                        /* No activity.. count down. */
 995                        loop--;
 996                        if (loop == 0) {
 997                                edge_port->chaseResponsePending = false;
 998                                dbg("%s - Chase TIMEOUT", __func__);
 999                                return;
1000                        }

1001                } else {
1002                        /* Reset timeout value back to 10 seconds */
1003                        dbg("%s - Last %d, Current %d", __func__,
1004                                        lastCredits, edge_port->txCredits);
1005                        loop = 10;
1006                }
1007        }
1008}
1009
1010
1011/************************************************************************
1012 *
1013 * block_until_tx_empty
1014 *
1015 *      This function will block the close until one of the following:
1016 *              1. TX count are 0
1017 *              2. The edgeport has stopped
1018 *              3. A timeout of 3 seconds without activity has expired
1019 *
1020 ************************************************************************/
1021static void block_until_tx_empty(struct edgeport_port *edge_port)
1022{
1023        DEFINE_WAIT(wait);
1024        struct TxFifo *fifo = &edge_port->txfifo;
1025        __u32 lastCount;
1026        int timeout = HZ/10;
1027        int loop = 30;
1028
1029        while (1) {
1030                /* Save Last count */
1031                lastCount = fifo->count;
1032
1033                /* Is the Edgeport Buffer empty? */
1034                if (lastCount == 0) {
1035                        dbg("%s - TX Buffer Empty", __func__);
1036                        return;
1037                }
1038
1039                /* Block the thread for a while */
1040                prepare_to_wait(&edge_port->wait_chase, &wait,
1041                                                TASK_UNINTERRUPTIBLE);
1042                schedule_timeout(timeout);
1043                finish_wait(&edge_port->wait_chase, &wait);
1044
1045                dbg("%s wait", __func__);
1046
1047                if (lastCount == fifo->count) {
1048                        /* No activity.. count down. */
1049                        loop--;
1050                        if (loop == 0) {
1051                                dbg("%s - TIMEOUT", __func__);
1052                                return;
1053                        }
1054                } else {
1055                        /* Reset timeout value back to seconds */
1056                        loop = 30;
1057                }
1058        }
1059}
1060
1061
1062/*****************************************************************************
1063 * edge_close
1064 *      this function is called by the tty driver when a port is closed
1065 *****************************************************************************/
1066static void edge_close(struct usb_serial_port *port)
1067{
1068        struct edgeport_serial *edge_serial;
1069        struct edgeport_port *edge_port;
1070        int status;
1071
1072        dbg("%s - port %d", __func__, port->number);
1073
1074        edge_serial = usb_get_serial_data(port->serial);
1075        edge_port = usb_get_serial_port_data(port);
1076        if (edge_serial == NULL || edge_port == NULL)
1077                return;
1078
1079        /* block until tx is empty */
1080        block_until_tx_empty(edge_port);
1081
1082        edge_port->closePending = true;
1083
1084        if ((!edge_serial->is_epic) ||
1085            ((edge_serial->is_epic) &&
1086             (edge_serial->epic_descriptor.Supports.IOSPChase))) {
1087                /* flush and chase */
1088                edge_port->chaseResponsePending = true;
1089
1090                dbg("%s - Sending IOSP_CMD_CHASE_PORT", __func__);
1091                status = send_iosp_ext_cmd(edge_port, IOSP_CMD_CHASE_PORT, 0);
1092                if (status == 0)
1093                        /* block until chase finished */
1094                        block_until_chase_response(edge_port);
1095                else
1096                        edge_port->chaseResponsePending = false;
1097        }
1098
1099        if ((!edge_serial->is_epic) ||
1100            ((edge_serial->is_epic) &&
1101             (edge_serial->epic_descriptor.Supports.IOSPClose))) {
1102               /* close the port */
1103                dbg("%s - Sending IOSP_CMD_CLOSE_PORT", __func__);
1104                send_iosp_ext_cmd(edge_port, IOSP_CMD_CLOSE_PORT, 0);
1105        }
1106
1107        /* port->close = true; */
1108        edge_port->closePending = false;
1109        edge_port->open = false;
1110        edge_port->openPending = false;
1111
1112        usb_kill_urb(edge_port->write_urb);
1113
1114        if (edge_port->write_urb) {
1115                /* if this urb had a transfer buffer already
1116                                (old transfer) free it */
1117                kfree(edge_port->write_urb->transfer_buffer);
1118                usb_free_urb(edge_port->write_urb);
1119                edge_port->write_urb = NULL;
1120        }
1121        kfree(edge_port->txfifo.fifo);
1122        edge_port->txfifo.fifo = NULL;
1123
1124        dbg("%s exited", __func__);
1125}
1126
1127/*****************************************************************************
1128 * SerialWrite
1129 *      this function is called by the tty driver when data should be written
1130 *      to the port.
1131 *      If successful, we return the number of bytes written, otherwise we
1132 *      return a negative error number.
1133 *****************************************************************************/
1134static int edge_write(struct tty_struct *tty, struct usb_serial_port *port,
1135                                        const unsigned char *data, int count)
1136{
1137        struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1138        struct TxFifo *fifo;
1139        int copySize;
1140        int bytesleft;
1141        int firsthalf;
1142        int secondhalf;
1143        unsigned long flags;
1144
1145        dbg("%s - port %d", __func__, port->number);
1146
1147        if (edge_port == NULL)
1148                return -ENODEV;
1149
1150        /* get a pointer to the Tx fifo */
1151        fifo = &edge_port->txfifo;
1152
1153        spin_lock_irqsave(&edge_port->ep_lock, flags);
1154
1155        /* calculate number of bytes to put in fifo */
1156        copySize = min((unsigned int)count,
1157                                (edge_port->txCredits - fifo->count));
1158
1159        dbg("%s(%d) of %d byte(s) Fifo room  %d -- will copy %d bytes",
1160                        __func__, port->number, count,
1161                        edge_port->txCredits - fifo->count, copySize);
1162
1163        /* catch writes of 0 bytes which the tty driver likes to give us,
1164           and when txCredits is empty */
1165        if (copySize == 0) {
1166                dbg("%s - copySize = Zero", __func__);
1167                goto finish_write;
1168        }
1169
1170        /* queue the data
1171         * since we can never overflow the buffer we do not have to check for a
1172         * full condition
1173         *
1174         * the copy is done is two parts -- first fill to the end of the buffer
1175         * then copy the reset from the start of the buffer
1176         */
1177        bytesleft = fifo->size - fifo->head;
1178        firsthalf = min(bytesleft, copySize);
1179        dbg("%s - copy %d bytes of %d into fifo ", __func__,
1180                                        firsthalf, bytesleft);
1181
1182        /* now copy our data */
1183        memcpy(&fifo->fifo[fifo->head], data, firsthalf);
1184        usb_serial_debug_data(debug, &port->dev, __func__,
1185                                        firsthalf, &fifo->fifo[fifo->head]);
1186
1187        /* update the index and size */
1188        fifo->head  += firsthalf;
1189        fifo->count += firsthalf;
1190
1191        /* wrap the index */
1192        if (fifo->head == fifo->size)
1193                fifo->head = 0;
1194
1195        secondhalf = copySize-firsthalf;
1196
1197        if (secondhalf) {
1198                dbg("%s - copy rest of data %d", __func__, secondhalf);
1199                memcpy(&fifo->fifo[fifo->head], &data[firsthalf], secondhalf);
1200                usb_serial_debug_data(debug, &port->dev, __func__,
1201                                        secondhalf, &fifo->fifo[fifo->head]);
1202                /* update the index and size */
1203                fifo->count += secondhalf;
1204                fifo->head  += secondhalf;
1205                /* No need to check for wrap since we can not get to end of
1206                 * the fifo in this part
1207                 */
1208        }
1209
1210finish_write:
1211        spin_unlock_irqrestore(&edge_port->ep_lock, flags);
1212
1213        send_more_port_data((struct edgeport_serial *)
1214                        usb_get_serial_data(port->serial), edge_port);
1215
1216        dbg("%s wrote %d byte(s) TxCredits %d, Fifo %d", __func__,
1217                                copySize, edge_port->txCredits, fifo->count);
1218
1219        return copySize;
1220}
1221
1222
1223/************************************************************************
1224 *
1225 * send_more_port_data()
1226 *
1227 *      This routine attempts to write additional UART transmit data
1228 *      to a port over the USB bulk pipe. It is called (1) when new
1229 *      data has been written to a port's TxBuffer from higher layers
1230 *      (2) when the peripheral sends us additional TxCredits indicating
1231 *      that it can accept more Tx data for a given port; and (3) when
1232 *      a bulk write completes successfully and we want to see if we
1233 *      can transmit more.
1234 *
1235 ************************************************************************/
1236static void send_more_port_data(struct edgeport_serial *edge_serial,
1237                                        struct edgeport_port *edge_port)
1238{
1239        struct TxFifo   *fifo = &edge_port->txfifo;
1240        struct urb      *urb;
1241        unsigned char   *buffer;
1242        int             status;
1243        int             count;
1244        int             bytesleft;
1245        int             firsthalf;
1246        int             secondhalf;
1247        unsigned long   flags;
1248
1249        dbg("%s(%d)", __func__, edge_port->port->number);
1250
1251        spin_lock_irqsave(&edge_port->ep_lock, flags);
1252
1253        if (edge_port->write_in_progress ||
1254            !edge_port->open             ||
1255            (fifo->count == 0)) {
1256                dbg("%s(%d) EXIT - fifo %d, PendingWrite = %d",
1257                                __func__, edge_port->port->number,
1258                                fifo->count, edge_port->write_in_progress);
1259                goto exit_send;
1260        }
1261
1262        /* since the amount of data in the fifo will always fit into the
1263         * edgeport buffer we do not need to check the write length
1264         *
1265         * Do we have enough credits for this port to make it worthwhile
1266         * to bother queueing a write. If it's too small, say a few bytes,
1267         * it's better to wait for more credits so we can do a larger write.
1268         */
1269        if (edge_port->txCredits < EDGE_FW_GET_TX_CREDITS_SEND_THRESHOLD(edge_port->maxTxCredits, EDGE_FW_BULK_MAX_PACKET_SIZE)) {
1270                dbg("%s(%d) Not enough credit - fifo %d TxCredit %d",
1271                        __func__, edge_port->port->number, fifo->count,
1272                        edge_port->txCredits);
1273                goto exit_send;
1274        }
1275
1276        /* lock this write */
1277        edge_port->write_in_progress = true;
1278
1279        /* get a pointer to the write_urb */
1280        urb = edge_port->write_urb;
1281
1282        /* make sure transfer buffer is freed */
1283        kfree(urb->transfer_buffer);
1284        urb->transfer_buffer = NULL;
1285
1286        /* build the data header for the buffer and port that we are about
1287           to send out */
1288        count = fifo->count;
1289        buffer = kmalloc(count+2, GFP_ATOMIC);
1290        if (buffer == NULL) {
1291                dev_err(&edge_port->port->dev,
1292                                "%s - no more kernel memory...\n", __func__);
1293                edge_port->write_in_progress = false;
1294                goto exit_send;
1295        }
1296        buffer[0] = IOSP_BUILD_DATA_HDR1(edge_port->port->number
1297                                - edge_port->port->serial->minor, count);
1298        buffer[1] = IOSP_BUILD_DATA_HDR2(edge_port->port->number
1299                                - edge_port->port->serial->minor, count);
1300
1301        /* now copy our data */
1302        bytesleft =  fifo->size - fifo->tail;
1303        firsthalf = min(bytesleft, count);
1304        memcpy(&buffer[2], &fifo->fifo[fifo->tail], firsthalf);
1305        fifo->tail  += firsthalf;
1306        fifo->count -= firsthalf;
1307        if (fifo->tail == fifo->size)
1308                fifo->tail = 0;
1309
1310        secondhalf = count-firsthalf;
1311        if (secondhalf) {
1312                memcpy(&buffer[2+firsthalf], &fifo->fifo[fifo->tail],
1313                                                                secondhalf);
1314                fifo->tail  += secondhalf;
1315                fifo->count -= secondhalf;
1316        }
1317
1318        if (count)
1319                usb_serial_debug_data(debug, &edge_port->port->dev,
1320                                                __func__, count, &buffer[2]);
1321
1322        /* fill up the urb with all of our data and submit it */
1323        usb_fill_bulk_urb(urb, edge_serial->serial->dev,
1324                        usb_sndbulkpipe(edge_serial->serial->dev,
1325                                        edge_serial->bulk_out_endpoint),
1326                        buffer, count+2,
1327                        edge_bulk_out_data_callback, edge_port);
1328
1329        /* decrement the number of credits we have by the number we just sent */
1330        edge_port->txCredits -= count;
1331        edge_port->icount.tx += count;
1332
1333        urb->dev = edge_serial->serial->dev;
1334        status = usb_submit_urb(urb, GFP_ATOMIC);
1335        if (status) {
1336                /* something went wrong */
1337                dev_err(&edge_port->port->dev,
1338                        "%s - usb_submit_urb(write bulk) failed, status = %d, data lost\n",
1339                                __func__, status);
1340                edge_port->write_in_progress = false;
1341
1342                /* revert the credits as something bad happened. */
1343                edge_port->txCredits += count;
1344                edge_port->icount.tx -= count;
1345        }
1346        dbg("%s wrote %d byte(s) TxCredit %d, Fifo %d",
1347                        __func__, count, edge_port->txCredits, fifo->count);
1348
1349exit_send:
1350        spin_unlock_irqrestore(&edge_port->ep_lock, flags);
1351}
1352
1353
1354/*****************************************************************************
1355 * edge_write_room
1356 *      this function is called by the tty driver when it wants to know how
1357 *      many bytes of data we can accept for a specific port. If successful,
1358 *      we return the amount of room that we have for this port (the txCredits)
1359 *      otherwise we return a negative error number.
1360 *****************************************************************************/
1361static int edge_write_room(struct tty_struct *tty)
1362{
1363        struct usb_serial_port *port = tty->driver_data;
1364        struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1365        int room;
1366        unsigned long flags;
1367
1368        dbg("%s", __func__);
1369
1370        if (edge_port == NULL)
1371                return 0;
1372        if (edge_port->closePending)
1373                return 0;
1374
1375        dbg("%s - port %d", __func__, port->number);
1376
1377        if (!edge_port->open) {
1378                dbg("%s - port not opened", __func__);
1379                return 0;
1380        }
1381
1382        /* total of both buffers is still txCredit */
1383        spin_lock_irqsave(&edge_port->ep_lock, flags);
1384        room = edge_port->txCredits - edge_port->txfifo.count;
1385        spin_unlock_irqrestore(&edge_port->ep_lock, flags);
1386
1387        dbg("%s - returns %d", __func__, room);
1388        return room;
1389}
1390
1391
1392/*****************************************************************************
1393 * edge_chars_in_buffer
1394 *      this function is called by the tty driver when it wants to know how
1395 *      many bytes of data we currently have outstanding in the port (data that
1396 *      has been written, but hasn't made it out the port yet)
1397 *      If successful, we return the number of bytes left to be written in the
1398 *      system,
1399 *      Otherwise we return a negative error number.
1400 *****************************************************************************/
1401static int edge_chars_in_buffer(struct tty_struct *tty)
1402{
1403        struct usb_serial_port *port = tty->driver_data;
1404        struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1405        int num_chars;
1406        unsigned long flags;
1407
1408        dbg("%s", __func__);
1409
1410        if (edge_port == NULL)
1411                return 0;
1412        if (edge_port->closePending)
1413                return 0;
1414
1415        if (!edge_port->open) {
1416                dbg("%s - port not opened", __func__);
1417                return 0;
1418        }
1419
1420        spin_lock_irqsave(&edge_port->ep_lock, flags);
1421        num_chars = edge_port->maxTxCredits - edge_port->txCredits +
1422                                                edge_port->txfifo.count;
1423        spin_unlock_irqrestore(&edge_port->ep_lock, flags);
1424        if (num_chars) {
1425                dbg("%s(port %d) - returns %d", __func__,
1426                                                port->number, num_chars);
1427        }
1428
1429        return num_chars;
1430}
1431
1432
1433/*****************************************************************************
1434 * SerialThrottle
1435 *      this function is called by the tty driver when it wants to stop the data
1436 *      being read from the port.
1437 *****************************************************************************/
1438static void edge_throttle(struct tty_struct *tty)
1439{
1440        struct usb_serial_port *port = tty->driver_data;
1441        struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1442        int status;
1443
1444        dbg("%s - port %d", __func__, port->number);
1445
1446        if (edge_port == NULL)
1447                return;
1448
1449        if (!edge_port->open) {
1450                dbg("%s - port not opened", __func__);
1451                return;
1452        }
1453
1454        /* if we are implementing XON/XOFF, send the stop character */
1455        if (I_IXOFF(tty)) {
1456                unsigned char stop_char = STOP_CHAR(tty);
1457                status = edge_write(tty, port, &stop_char, 1);
1458                if (status <= 0)
1459                        return;
1460        }
1461
1462        /* if we are implementing RTS/CTS, toggle that line */
1463        if (tty->termios->c_cflag & CRTSCTS) {
1464                edge_port->shadowMCR &= ~MCR_RTS;
1465                status = send_cmd_write_uart_register(edge_port, MCR,
1466                                                        edge_port->shadowMCR);
1467                if (status != 0)
1468                        return;
1469        }
1470}
1471
1472
1473/*****************************************************************************
1474 * edge_unthrottle
1475 *      this function is called by the tty driver when it wants to resume the
1476 *      data being read from the port (called after SerialThrottle is called)
1477 *****************************************************************************/
1478static void edge_unthrottle(struct tty_struct *tty)
1479{
1480        struct usb_serial_port *port = tty->driver_data;
1481        struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1482        int status;
1483
1484        dbg("%s - port %d", __func__, port->number);
1485
1486        if (edge_port == NULL)
1487                return;
1488
1489        if (!edge_port->open) {
1490                dbg("%s - port not opened", __func__);
1491                return;
1492        }
1493
1494        /* if we are implementing XON/XOFF, send the start character */
1495        if (I_IXOFF(tty)) {
1496                unsigned char start_char = START_CHAR(tty);
1497                status = edge_write(tty, port, &start_char, 1);
1498                if (status <= 0)
1499                        return;
1500        }
1501        /* if we are implementing RTS/CTS, toggle that line */
1502        if (tty->termios->c_cflag & CRTSCTS) {
1503                edge_port->shadowMCR |= MCR_RTS;
1504                send_cmd_write_uart_register(edge_port, MCR,
1505                                                edge_port->shadowMCR);
1506        }
1507}
1508
1509
1510/*****************************************************************************
1511 * SerialSetTermios
1512 *      this function is called by the tty driver when it wants to change
1513 * the termios structure
1514 *****************************************************************************/
1515static void edge_set_termios(struct tty_struct *tty,
1516        struct usb_serial_port *port, struct ktermios *old_termios)
1517{
1518        struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1519        unsigned int cflag;
1520
1521        cflag = tty->termios->c_cflag;
1522        dbg("%s - clfag %08x iflag %08x", __func__,
1523            tty->termios->c_cflag, tty->termios->c_iflag);
1524        dbg("%s - old clfag %08x old iflag %08x", __func__,
1525            old_termios->c_cflag, old_termios->c_iflag);
1526
1527        dbg("%s - port %d", __func__, port->number);
1528
1529        if (edge_port == NULL)
1530                return;
1531
1532        if (!edge_port->open) {
1533                dbg("%s - port not opened", __func__);
1534                return;
1535        }
1536
1537        /* change the port settings to the new ones specified */
1538        change_port_settings(tty, edge_port, old_termios);
1539}
1540
1541
1542/*****************************************************************************
1543 * get_lsr_info - get line status register info
1544 *
1545 * Purpose: Let user call ioctl() to get info when the UART physically
1546 *          is emptied.  On bus types like RS485, the transmitter must
1547 *          release the bus after transmitting. This must be done when
1548 *          the transmit shift register is empty, not be done when the
1549 *          transmit holding register is empty.  This functionality
1550 *          allows an RS485 driver to be written in user space.
1551 *****************************************************************************/
1552static int get_lsr_info(struct edgeport_port *edge_port,
1553                                                unsigned int __user *value)
1554{
1555        unsigned int result = 0;
1556        unsigned long flags;
1557
1558        spin_lock_irqsave(&edge_port->ep_lock, flags);
1559        if (edge_port->maxTxCredits == edge_port->txCredits &&
1560            edge_port->txfifo.count == 0) {
1561                dbg("%s -- Empty", __func__);
1562                result = TIOCSER_TEMT;
1563        }
1564        spin_unlock_irqrestore(&edge_port->ep_lock, flags);
1565
1566        if (copy_to_user(value, &result, sizeof(int)))
1567                return -EFAULT;
1568        return 0;
1569}
1570
1571static int edge_tiocmset(struct tty_struct *tty, struct file *file,
1572                                        unsigned int set, unsigned int clear)
1573{
1574        struct usb_serial_port *port = tty->driver_data;
1575        struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1576        unsigned int mcr;
1577
1578        dbg("%s - port %d", __func__, port->number);
1579
1580        mcr = edge_port->shadowMCR;
1581        if (set & TIOCM_RTS)
1582                mcr |= MCR_RTS;
1583        if (set & TIOCM_DTR)
1584                mcr |= MCR_DTR;
1585        if (set & TIOCM_LOOP)
1586                mcr |= MCR_LOOPBACK;
1587
1588        if (clear & TIOCM_RTS)
1589                mcr &= ~MCR_RTS;
1590        if (clear & TIOCM_DTR)
1591                mcr &= ~MCR_DTR;
1592        if (clear & TIOCM_LOOP)
1593                mcr &= ~MCR_LOOPBACK;
1594
1595        edge_port->shadowMCR = mcr;
1596
1597        send_cmd_write_uart_register(edge_port, MCR, edge_port->shadowMCR);
1598
1599        return 0;
1600}
1601
1602static int edge_tiocmget(struct tty_struct *tty, struct file *file)
1603{
1604        struct usb_serial_port *port = tty->driver_data;
1605        struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1606        unsigned int result = 0;
1607        unsigned int msr;
1608        unsigned int mcr;
1609
1610        dbg("%s - port %d", __func__, port->number);
1611
1612        msr = edge_port->shadowMSR;
1613        mcr = edge_port->shadowMCR;
1614        result = ((mcr & MCR_DTR)       ? TIOCM_DTR: 0)   /* 0x002 */
1615                  | ((mcr & MCR_RTS)    ? TIOCM_RTS: 0)   /* 0x004 */
1616                  | ((msr & EDGEPORT_MSR_CTS)   ? TIOCM_CTS: 0)   /* 0x020 */
1617                  | ((msr & EDGEPORT_MSR_CD)    ? TIOCM_CAR: 0)   /* 0x040 */
1618                  | ((msr & EDGEPORT_MSR_RI)    ? TIOCM_RI:  0)   /* 0x080 */
1619                  | ((msr & EDGEPORT_MSR_DSR)   ? TIOCM_DSR: 0);  /* 0x100 */
1620
1621
1622        dbg("%s -- %x", __func__, result);
1623
1624        return result;
1625}
1626
1627static int edge_get_icount(struct tty_struct *tty,
1628                                struct serial_icounter_struct *icount)
1629{
1630        struct usb_serial_port *port = tty->driver_data;
1631        struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1632        struct async_icount cnow;
1633        cnow = edge_port->icount;
1634
1635        icount->cts = cnow.cts;
1636        icount->dsr = cnow.dsr;
1637        icount->rng = cnow.rng;
1638        icount->dcd = cnow.dcd;
1639        icount->rx = cnow.rx;
1640        icount->tx = cnow.tx;
1641        icount->frame = cnow.frame;
1642        icount->overrun = cnow.overrun;
1643        icount->parity = cnow.parity;
1644        icount->brk = cnow.brk;
1645        icount->buf_overrun = cnow.buf_overrun;
1646
1647        dbg("%s (%d) TIOCGICOUNT RX=%d, TX=%d",
1648                        __func__,  port->number, icount->rx, icount->tx);
1649        return 0;
1650}
1651
1652static int get_serial_info(struct edgeport_port *edge_port,
1653                                struct serial_struct __user *retinfo)
1654{
1655        struct serial_struct tmp;
1656
1657        if (!retinfo)
1658                return -EFAULT;
1659
1660        memset(&tmp, 0, sizeof(tmp));
1661
1662        tmp.type                = PORT_16550A;
1663        tmp.line                = edge_port->port->serial->minor;
1664        tmp.port                = edge_port->port->number;
1665        tmp.irq                 = 0;
1666        tmp.flags               = ASYNC_SKIP_TEST | ASYNC_AUTO_IRQ;
1667        tmp.xmit_fifo_size      = edge_port->maxTxCredits;
1668        tmp.baud_base           = 9600;
1669        tmp.close_delay         = 5*HZ;
1670        tmp.closing_wait        = 30*HZ;
1671
1672        if (copy_to_user(retinfo, &tmp, sizeof(*retinfo)))
1673                return -EFAULT;
1674        return 0;
1675}
1676
1677
1678/*****************************************************************************
1679 * SerialIoctl
1680 *      this function handles any ioctl calls to the driver
1681 *****************************************************************************/
1682static int edge_ioctl(struct tty_struct *tty, struct file *file,
1683                                        unsigned int cmd, unsigned long arg)
1684{
1685        struct usb_serial_port *port = tty->driver_data;
1686        DEFINE_WAIT(wait);
1687        struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1688        struct async_icount cnow;
1689        struct async_icount cprev;
1690
1691        dbg("%s - port %d, cmd = 0x%x", __func__, port->number, cmd);
1692
1693        switch (cmd) {
1694        case TIOCSERGETLSR:
1695                dbg("%s (%d) TIOCSERGETLSR", __func__,  port->number);
1696                return get_lsr_info(edge_port, (unsigned int __user *) arg);
1697
1698        case TIOCGSERIAL:
1699                dbg("%s (%d) TIOCGSERIAL", __func__,  port->number);
1700                return get_serial_info(edge_port, (struct serial_struct __user *) arg);
1701
1702        case TIOCMIWAIT:
1703                dbg("%s (%d) TIOCMIWAIT", __func__,  port->number);
1704                cprev = edge_port->icount;
1705                while (1) {
1706                        prepare_to_wait(&edge_port->delta_msr_wait,
1707                                                &wait, TASK_INTERRUPTIBLE);
1708                        schedule();
1709                        finish_wait(&edge_port->delta_msr_wait, &wait);
1710                        /* see if a signal did it */
1711                        if (signal_pending(current))
1712                                return -ERESTARTSYS;
1713                        cnow = edge_port->icount;
1714                        if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr &&
1715                            cnow.dcd == cprev.dcd && cnow.cts == cprev.cts)
1716                                return -EIO; /* no change => error */
1717                        if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
1718                            ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
1719                            ((arg & TIOCM_CD)  && (cnow.dcd != cprev.dcd)) ||
1720                            ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts))) {
1721                                return 0;
1722                        }
1723                        cprev = cnow;
1724                }
1725                /* NOTREACHED */
1726                break;
1727
1728        }
1729        return -ENOIOCTLCMD;
1730}
1731
1732
1733/*****************************************************************************
1734 * SerialBreak
1735 *      this function sends a break to the port
1736 *****************************************************************************/
1737static void edge_break(struct tty_struct *tty, int break_state)
1738{
1739        struct usb_serial_port *port = tty->driver_data;
1740        struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1741        struct edgeport_serial *edge_serial = usb_get_serial_data(port->serial);
1742        int status;
1743
1744        if ((!edge_serial->is_epic) ||
1745            ((edge_serial->is_epic) &&
1746             (edge_serial->epic_descriptor.Supports.IOSPChase))) {
1747                /* flush and chase */
1748                edge_port->chaseResponsePending = true;
1749
1750                dbg("%s - Sending IOSP_CMD_CHASE_PORT", __func__);
1751                status = send_iosp_ext_cmd(edge_port, IOSP_CMD_CHASE_PORT, 0);
1752                if (status == 0) {
1753                        /* block until chase finished */
1754                        block_until_chase_response(edge_port);
1755                } else {
1756                        edge_port->chaseResponsePending = false;
1757                }
1758        }
1759
1760        if ((!edge_serial->is_epic) ||
1761            ((edge_serial->is_epic) &&
1762             (edge_serial->epic_descriptor.Supports.IOSPSetClrBreak))) {
1763                if (break_state == -1) {
1764                        dbg("%s - Sending IOSP_CMD_SET_BREAK", __func__);
1765                        status = send_iosp_ext_cmd(edge_port,
1766                                                IOSP_CMD_SET_BREAK, 0);
1767                } else {
1768                        dbg("%s - Sending IOSP_CMD_CLEAR_BREAK", __func__);
1769                        status = send_iosp_ext_cmd(edge_port,
1770                                                IOSP_CMD_CLEAR_BREAK, 0);
1771                }
1772                if (status)
1773                        dbg("%s - error sending break set/clear command.",
1774                                __func__);
1775        }
1776}
1777
1778
1779/*****************************************************************************
1780 * process_rcvd_data
1781 *      this function handles the data received on the bulk in pipe.
1782 *****************************************************************************/
1783static void process_rcvd_data(struct edgeport_serial *edge_serial,
1784                                unsigned char *buffer, __u16 bufferLength)
1785{
1786        struct usb_serial_port *port;
1787        struct edgeport_port *edge_port;
1788        struct tty_struct *tty;
1789        __u16 lastBufferLength;
1790        __u16 rxLen;
1791
1792        dbg("%s", __func__);
1793
1794        lastBufferLength = bufferLength + 1;
1795
1796        while (bufferLength > 0) {
1797                /* failsafe incase we get a message that we don't understand */
1798                if (lastBufferLength == bufferLength) {
1799                        dbg("%s - stuck in loop, exiting it.", __func__);
1800                        break;
1801                }
1802                lastBufferLength = bufferLength;
1803
1804                switch (edge_serial->rxState) {
1805                case EXPECT_HDR1:
1806                        edge_serial->rxHeader1 = *buffer;
1807                        ++buffer;
1808                        --bufferLength;
1809
1810                        if (bufferLength == 0) {
1811                                edge_serial->rxState = EXPECT_HDR2;
1812                                break;
1813                        }
1814                        /* otherwise, drop on through */
1815                case EXPECT_HDR2:
1816                        edge_serial->rxHeader2 = *buffer;
1817                        ++buffer;
1818                        --bufferLength;
1819
1820                        dbg("%s - Hdr1=%02X Hdr2=%02X", __func__,
1821                            edge_serial->rxHeader1, edge_serial->rxHeader2);
1822                        /* Process depending on whether this header is
1823                         * data or status */
1824
1825                        if (IS_CMD_STAT_HDR(edge_serial->rxHeader1)) {
1826                                /* Decode this status header and go to
1827                                 * EXPECT_HDR1 (if we can process the status
1828                                 * with only 2 bytes), or go to EXPECT_HDR3 to
1829                                 * get the third byte. */
1830                                edge_serial->rxPort =
1831                                    IOSP_GET_HDR_PORT(edge_serial->rxHeader1);
1832                                edge_serial->rxStatusCode =
1833                                    IOSP_GET_STATUS_CODE(
1834                                                edge_serial->rxHeader1);
1835
1836                                if (!IOSP_STATUS_IS_2BYTE(
1837                                                edge_serial->rxStatusCode)) {
1838                                        /* This status needs additional bytes.
1839                                         * Save what we have and then wait for
1840                                         * more data.
1841                                         */
1842                                        edge_serial->rxStatusParam
1843                                                = edge_serial->rxHeader2;
1844                                        edge_serial->rxState = EXPECT_HDR3;
1845                                        break;
1846                                }
1847                                /* We have all the header bytes, process the
1848                                   status now */
1849                                process_rcvd_status(edge_serial,
1850                                                edge_serial->rxHeader2, 0);
1851                                edge_serial->rxState = EXPECT_HDR1;
1852                                break;
1853                        } else {
1854                                edge_serial->rxPort =
1855                                    IOSP_GET_HDR_PORT(edge_serial->rxHeader1);
1856                                edge_serial->rxBytesRemaining =
1857                                    IOSP_GET_HDR_DATA_LEN(
1858                                                edge_serial->rxHeader1,
1859                                                edge_serial->rxHeader2);
1860                                dbg("%s - Data for Port %u Len %u",
1861                                                __func__,
1862                                                edge_serial->rxPort,
1863                                                edge_serial->rxBytesRemaining);
1864
1865                                /* ASSERT(DevExt->RxPort < DevExt->NumPorts);
1866                                 * ASSERT(DevExt->RxBytesRemaining <
1867                                 *              IOSP_MAX_DATA_LENGTH);
1868                                 */
1869
1870                                if (bufferLength == 0) {
1871                                        edge_serial->rxState = EXPECT_DATA;
1872                                        break;
1873                                }
1874                                /* Else, drop through */
1875                        }
1876                case EXPECT_DATA: /* Expect data */
1877                        if (bufferLength < edge_serial->rxBytesRemaining) {
1878                                rxLen = bufferLength;
1879                                /* Expect data to start next buffer */
1880                                edge_serial->rxState = EXPECT_DATA;
1881                        } else {
1882                                /* BufLen >= RxBytesRemaining */
1883                                rxLen = edge_serial->rxBytesRemaining;
1884                                /* Start another header next time */
1885                                edge_serial->rxState = EXPECT_HDR1;
1886                        }
1887
1888                        bufferLength -= rxLen;
1889                        edge_serial->rxBytesRemaining -= rxLen;
1890
1891                        /* spit this data back into the tty driver if this
1892                           port is open */
1893                        if (rxLen) {
1894                                port = edge_serial->serial->port[
1895                                                        edge_serial->rxPort];
1896                                edge_port = usb_get_serial_port_data(port);
1897                                if (edge_port->open) {
1898                                        tty = tty_port_tty_get(
1899                                                &edge_port->port->port);
1900                                        if (tty) {
1901                                                dbg("%s - Sending %d bytes to TTY for port %d",
1902                                                        __func__, rxLen, edge_serial->rxPort);
1903                                                edge_tty_recv(&edge_serial->serial->dev->dev, tty, buffer, rxLen);
1904                                                tty_kref_put(tty);
1905                                        }
1906                                        edge_port->icount.rx += rxLen;
1907                                }
1908                                buffer += rxLen;
1909                        }
1910                        break;
1911
1912                case EXPECT_HDR3:       /* Expect 3rd byte of status header */
1913                        edge_serial->rxHeader3 = *buffer;
1914                        ++buffer;
1915                        --bufferLength;
1916
1917                        /* We have all the header bytes, process the
1918                           status now */
1919                        process_rcvd_status(edge_serial,
1920                                edge_serial->rxStatusParam,
1921                                edge_serial->rxHeader3);
1922                        edge_serial->rxState = EXPECT_HDR1;
1923                        break;
1924                }
1925        }
1926}
1927
1928
1929/*****************************************************************************
1930 * process_rcvd_status
1931 *      this function handles the any status messages received on the
1932 *      bulk in pipe.
1933 *****************************************************************************/
1934static void process_rcvd_status(struct edgeport_serial *edge_serial,
1935                                                __u8 byte2, __u8 byte3)
1936{
1937        struct usb_serial_port *port;
1938        struct edgeport_port *edge_port;
1939        struct tty_struct *tty;
1940        __u8 code = edge_serial->rxStatusCode;
1941
1942        /* switch the port pointer to the one being currently talked about */
1943        port = edge_serial->serial->port[edge_serial->rxPort];
1944        edge_port = usb_get_serial_port_data(port);
1945        if (edge_port == NULL) {
1946                dev_err(&edge_serial->serial->dev->dev,
1947                        "%s - edge_port == NULL for port %d\n",
1948                                        __func__, edge_serial->rxPort);
1949                return;
1950        }
1951
1952        dbg("%s - port %d", __func__, edge_serial->rxPort);
1953
1954        if (code == IOSP_EXT_STATUS) {
1955                switch (byte2) {
1956                case IOSP_EXT_STATUS_CHASE_RSP:
1957                        /* we want to do EXT status regardless of port
1958                         * open/closed */
1959                        dbg("%s - Port %u EXT CHASE_RSP Data = %02x",
1960                                        __func__, edge_serial->rxPort, byte3);
1961                        /* Currently, the only EXT_STATUS is Chase, so process
1962                         * here instead of one more call to one more subroutine
1963                         * If/when more EXT_STATUS, there'll be more work to do
1964                         * Also, we currently clear flag and close the port
1965                         * regardless of content of above's Byte3.
1966                         * We could choose to do something else when Byte3 says
1967                         * Timeout on Chase from Edgeport, like wait longer in
1968                         * block_until_chase_response, but for now we don't.
1969                         */
1970                        edge_port->chaseResponsePending = false;
1971                        wake_up(&edge_port->wait_chase);
1972                        return;
1973
1974                case IOSP_EXT_STATUS_RX_CHECK_RSP:
1975                        dbg("%s ========== Port %u CHECK_RSP Sequence = %02x =============", __func__, edge_serial->rxPort, byte3);
1976                        /* Port->RxCheckRsp = true; */
1977                        return;
1978                }
1979        }
1980
1981        if (code == IOSP_STATUS_OPEN_RSP) {
1982                edge_port->txCredits = GET_TX_BUFFER_SIZE(byte3);
1983                edge_port->maxTxCredits = edge_port->txCredits;
1984                dbg("%s - Port %u Open Response Inital MSR = %02x TxBufferSize = %d", __func__, edge_serial->rxPort, byte2, edge_port->txCredits);
1985                handle_new_msr(edge_port, byte2);
1986
1987                /* send the current line settings to the port so we are
1988                   in sync with any further termios calls */
1989                tty = tty_port_tty_get(&edge_port->port->port);
1990                if (tty) {
1991                        change_port_settings(tty,
1992                                edge_port, tty->termios);
1993                        tty_kref_put(tty);
1994                }
1995
1996                /* we have completed the open */
1997                edge_port->openPending = false;
1998                edge_port->open = true;
1999                wake_up(&edge_port->wait_open);
2000                return;

2001        }
2002
2003        /* If port is closed, silently discard all rcvd status. We can
2004         * have cases where buffered status is received AFTER the close
2005         * port command is sent to the Edgeport.
2006         */
2007        if (!edge_port->open || edge_port->closePending)
2008                return;
2009
2010        switch (code) {
2011        /* Not currently sent by Edgeport */
2012        case IOSP_STATUS_LSR:
2013                dbg("%s - Port %u LSR Status = %02x",
2014                                        __func__, edge_serial->rxPort, byte2);
2015                handle_new_lsr(edge_port, false, byte2, 0);
2016                break;
2017
2018        case IOSP_STATUS_LSR_DATA:
2019                dbg("%s - Port %u LSR Status = %02x, Data = %02x",
2020                                __func__, edge_serial->rxPort, byte2, byte3);
2021                /* byte2 is LSR Register */
2022                /* byte3 is broken data byte */
2023                handle_new_lsr(edge_port, true, byte2, byte3);
2024                break;
2025        /*
2026         *      case IOSP_EXT_4_STATUS:
2027         *              dbg("%s - Port %u LSR Status = %02x Data = %02x",
2028         *                      __func__, edge_serial->rxPort, byte2, byte3);
2029         *              break;
2030         */
2031        case IOSP_STATUS_MSR:
2032                dbg("%s - Port %u MSR Status = %02x",
2033                                        __func__, edge_serial->rxPort, byte2);
2034                /*
2035                 * Process this new modem status and generate appropriate
2036                 * events, etc, based on the new status. This routine
2037                 * also saves the MSR in Port->ShadowMsr.
2038                 */
2039                handle_new_msr(edge_port, byte2);
2040                break;
2041
2042        default:
2043                dbg("%s - Unrecognized IOSP status code %u", __func__, code);
2044                break;
2045        }
2046}
2047
2048
2049/*****************************************************************************
2050 * edge_tty_recv
2051 *      this function passes data on to the tty flip buffer
2052 *****************************************************************************/
2053static void edge_tty_recv(struct device *dev, struct tty_struct *tty,
2054                                        unsigned char *data, int length)
2055{
2056        int cnt;
2057
2058        cnt = tty_insert_flip_string(tty, data, length);
2059        if (cnt < length) {
2060                dev_err(dev, "%s - dropping data, %d bytes lost\n",
2061                                __func__, length - cnt);
2062        }
2063        data += cnt;
2064        length -= cnt;
2065
2066        tty_flip_buffer_push(tty);
2067}
2068
2069
2070/*****************************************************************************
2071 * handle_new_msr
2072 *      this function handles any change to the msr register for a port.
2073 *****************************************************************************/
2074static void handle_new_msr(struct edgeport_port *edge_port, __u8 newMsr)
2075{
2076        struct  async_icount *icount;
2077
2078        dbg("%s %02x", __func__, newMsr);
2079
2080        if (newMsr & (EDGEPORT_MSR_DELTA_CTS | EDGEPORT_MSR_DELTA_DSR |
2081                        EDGEPORT_MSR_DELTA_RI | EDGEPORT_MSR_DELTA_CD)) {
2082                icount = &edge_port->icount;
2083
2084                /* update input line counters */
2085                if (newMsr & EDGEPORT_MSR_DELTA_CTS)
2086                        icount->cts++;
2087                if (newMsr & EDGEPORT_MSR_DELTA_DSR)
2088                        icount->dsr++;
2089                if (newMsr & EDGEPORT_MSR_DELTA_CD)
2090                        icount->dcd++;
2091                if (newMsr & EDGEPORT_MSR_DELTA_RI)
2092                        icount->rng++;
2093                wake_up_interruptible(&edge_port->delta_msr_wait);
2094        }
2095
2096        /* Save the new modem status */
2097        edge_port->shadowMSR = newMsr & 0xf0;
2098}
2099
2100
2101/*****************************************************************************
2102 * handle_new_lsr
2103 *      this function handles any change to the lsr register for a port.
2104 *****************************************************************************/
2105static void handle_new_lsr(struct edgeport_port *edge_port, __u8 lsrData,
2106                                                        __u8 lsr, __u8 data)
2107{
2108        __u8 newLsr = (__u8) (lsr & (__u8)
2109                (LSR_OVER_ERR | LSR_PAR_ERR | LSR_FRM_ERR | LSR_BREAK));
2110        struct async_icount *icount;
2111
2112        dbg("%s - %02x", __func__, newLsr);
2113
2114        edge_port->shadowLSR = lsr;
2115
2116        if (newLsr & LSR_BREAK) {
2117                /*
2118                 * Parity and Framing errors only count if they
2119                 * occur exclusive of a break being
2120                 * received.
2121                 */
2122                newLsr &= (__u8)(LSR_OVER_ERR | LSR_BREAK);
2123        }
2124
2125        /* Place LSR data byte into Rx buffer */
2126        if (lsrData) {
2127                struct tty_struct *tty =
2128                                tty_port_tty_get(&edge_port->port->port);
2129                if (tty) {
2130                        edge_tty_recv(&edge_port->port->dev, tty, &data, 1);
2131                        tty_kref_put(tty);
2132                }
2133        }
2134        /* update input line counters */
2135        icount = &edge_port->icount;
2136        if (newLsr & LSR_BREAK)
2137                icount->brk++;
2138        if (newLsr & LSR_OVER_ERR)
2139                icount->overrun++;
2140        if (newLsr & LSR_PAR_ERR)
2141                icount->parity++;
2142        if (newLsr & LSR_FRM_ERR)
2143                icount->frame++;
2144}
2145
2146
2147/****************************************************************************
2148 * sram_write
2149 *      writes a number of bytes to the Edgeport device's sram starting at the
2150 *      given address.
2151 *      If successful returns the number of bytes written, otherwise it returns
2152 *      a negative error number of the problem.
2153 ****************************************************************************/
2154static int sram_write(struct usb_serial *serial, __u16 extAddr, __u16 addr,
2155                                        __u16 length, const __u8 *data)
2156{
2157        int result;
2158        __u16 current_length;
2159        unsigned char *transfer_buffer;
2160
2161        dbg("%s - %x, %x, %d", __func__, extAddr, addr, length);
2162
2163        transfer_buffer =  kmalloc(64, GFP_KERNEL);
2164        if (!transfer_buffer) {
2165                dev_err(&serial->dev->dev, "%s - kmalloc(%d) failed.\n",
2166                                                        __func__, 64);
2167                return -ENOMEM;
2168        }
2169
2170        /* need to split these writes up into 64 byte chunks */
2171        result = 0;
2172        while (length > 0) {
2173                if (length > 64)
2174                        current_length = 64;
2175                else
2176                        current_length = length;
2177
2178/*              dbg("%s - writing %x, %x, %d", __func__,
2179                                        extAddr, addr, current_length); */
2180                memcpy(transfer_buffer, data, current_length);
2181                result = usb_control_msg(serial->dev,
2182                                        usb_sndctrlpipe(serial->dev, 0),
2183                                        USB_REQUEST_ION_WRITE_RAM,
2184                                        0x40, addr, extAddr, transfer_buffer,
2185                                        current_length, 300);
2186                if (result < 0)
2187                        break;
2188                length -= current_length;
2189                addr += current_length;
2190                data += current_length;
2191        }
2192
2193        kfree(transfer_buffer);
2194        return result;
2195}
2196
2197
2198/****************************************************************************
2199 * rom_write
2200 *      writes a number of bytes to the Edgeport device's ROM starting at the
2201 *      given address.
2202 *      If successful returns the number of bytes written, otherwise it returns
2203 *      a negative error number of the problem.
2204 ****************************************************************************/
2205static int rom_write(struct usb_serial *serial, __u16 extAddr, __u16 addr,
2206                                        __u16 length, const __u8 *data)
2207{
2208        int result;
2209        __u16 current_length;
2210        unsigned char *transfer_buffer;
2211
2212/*      dbg("%s - %x, %x, %d", __func__, extAddr, addr, length); */
2213
2214        transfer_buffer =  kmalloc(64, GFP_KERNEL);
2215        if (!transfer_buffer) {
2216                dev_err(&serial->dev->dev, "%s - kmalloc(%d) failed.\n",
2217                                                                __func__, 64);
2218                return -ENOMEM;
2219        }
2220
2221        /* need to split these writes up into 64 byte chunks */
2222        result = 0;
2223        while (length > 0) {
2224                if (length > 64)
2225                        current_length = 64;
2226                else
2227                        current_length = length;
2228/*              dbg("%s - writing %x, %x, %d", __func__,
2229                                        extAddr, addr, current_length); */
2230                memcpy(transfer_buffer, data, current_length);
2231                result = usb_control_msg(serial->dev,
2232                                        usb_sndctrlpipe(serial->dev, 0),
2233                                        USB_REQUEST_ION_WRITE_ROM, 0x40,
2234                                        addr, extAddr,
2235                                        transfer_buffer, current_length, 300);
2236                if (result < 0)
2237                        break;
2238                length -= current_length;
2239                addr += current_length;
2240                data += current_length;
2241        }
2242
2243        kfree(transfer_buffer);
2244        return result;
2245}
2246
2247
2248/****************************************************************************
2249 * rom_read
2250 *      reads a number of bytes from the Edgeport device starting at the given
2251 *      address.
2252 *      If successful returns the number of bytes read, otherwise it returns
2253 *      a negative error number of the problem.
2254 ****************************************************************************/
2255static int rom_read(struct usb_serial *serial, __u16 extAddr,
2256                                        __u16 addr, __u16 length, __u8 *data)
2257{
2258        int result;
2259        __u16 current_length;
2260        unsigned char *transfer_buffer;
2261
2262        dbg("%s - %x, %x, %d", __func__, extAddr, addr, length);
2263
2264        transfer_buffer =  kmalloc(64, GFP_KERNEL);
2265        if (!transfer_buffer) {
2266                dev_err(&serial->dev->dev,
2267                        "%s - kmalloc(%d) failed.\n", __func__, 64);
2268                return -ENOMEM;
2269        }
2270
2271        /* need to split these reads up into 64 byte chunks */
2272        result = 0;
2273        while (length > 0) {
2274                if (length > 64)
2275                        current_length = 64;
2276                else
2277                        current_length = length;
2278/*              dbg("%s - %x, %x, %d", __func__,
2279                                extAddr, addr, current_length); */
2280                result = usb_control_msg(serial->dev,
2281                                        usb_rcvctrlpipe(serial->dev, 0),
2282                                        USB_REQUEST_ION_READ_ROM,
2283                                        0xC0, addr, extAddr, transfer_buffer,
2284                                        current_length, 300);
2285                if (result < 0)
2286                        break;
2287                memcpy(data, transfer_buffer, current_length);
2288                length -= current_length;
2289                addr += current_length;
2290                data += current_length;
2291        }
2292
2293        kfree(transfer_buffer);
2294        return result;
2295}
2296
2297
2298/****************************************************************************
2299 * send_iosp_ext_cmd
2300 *      Is used to send a IOSP message to the Edgeport device
2301 ****************************************************************************/
2302static int send_iosp_ext_cmd(struct edgeport_port *edge_port,
2303                                                __u8 command, __u8 param)
2304{
2305        unsigned char   *buffer;
2306        unsigned char   *currentCommand;
2307        int             length = 0;
2308        int             status = 0;
2309
2310        dbg("%s - %d, %d", __func__, command, param);
2311
2312        buffer = kmalloc(10, GFP_ATOMIC);
2313        if (!buffer) {
2314                dev_err(&edge_port->port->dev,
2315                                "%s - kmalloc(%d) failed.\n", __func__, 10);
2316                return -ENOMEM;
2317        }
2318
2319        currentCommand = buffer;
2320
2321        MAKE_CMD_EXT_CMD(&currentCommand, &length,
2322                edge_port->port->number - edge_port->port->serial->minor,
2323                command, param);
2324
2325        status = write_cmd_usb(edge_port, buffer, length);
2326        if (status) {
2327                /* something bad happened, let's free up the memory */
2328                kfree(buffer);
2329        }
2330
2331        return status;
2332}
2333
2334
2335/*****************************************************************************
2336 * write_cmd_usb
2337 *      this function writes the given buffer out to the bulk write endpoint.
2338 *****************************************************************************/
2339static int write_cmd_usb(struct edgeport_port *edge_port,
2340                                        unsigned char *buffer, int length)
2341{
2342        struct edgeport_serial *edge_serial =
2343                                usb_get_serial_data(edge_port->port->serial);
2344        int status = 0;
2345        struct urb *urb;
2346        int timeout;
2347
2348        usb_serial_debug_data(debug, &edge_port->port->dev,
2349                                                __func__, length, buffer);
2350
2351        /* Allocate our next urb */
2352        urb = usb_alloc_urb(0, GFP_ATOMIC);
2353        if (!urb)
2354                return -ENOMEM;
2355
2356        atomic_inc(&CmdUrbs);
2357        dbg("%s - ALLOCATE URB %p (outstanding %d)",
2358                                __func__, urb, atomic_read(&CmdUrbs));
2359
2360        usb_fill_bulk_urb(urb, edge_serial->serial->dev,
2361                        usb_sndbulkpipe(edge_serial->serial->dev,
2362                                        edge_serial->bulk_out_endpoint),
2363                        buffer, length, edge_bulk_out_cmd_callback, edge_port);
2364
2365        edge_port->commandPending = true;
2366        status = usb_submit_urb(urb, GFP_ATOMIC);
2367
2368        if (status) {
2369                /* something went wrong */
2370                dev_err(&edge_port->port->dev,
2371                    "%s - usb_submit_urb(write command) failed, status = %d\n",
2372                                                        __func__, status);
2373                usb_kill_urb(urb);
2374                usb_free_urb(urb);
2375                atomic_dec(&CmdUrbs);
2376                return status;
2377        }
2378
2379        /* wait for command to finish */
2380        timeout = COMMAND_TIMEOUT;
2381#if 0
2382        wait_event(&edge_port->wait_command, !edge_port->commandPending);
2383
2384        if (edge_port->commandPending) {
2385                /* command timed out */
2386                dbg("%s - command timed out", __func__);
2387                status = -EINVAL;
2388        }
2389#endif
2390        return status;
2391}
2392
2393
2394/*****************************************************************************
2395 * send_cmd_write_baud_rate
2396 *      this function sends the proper command to change the baud rate of the
2397 *      specified port.
2398 *****************************************************************************/
2399static int send_cmd_write_baud_rate(struct edgeport_port *edge_port,
2400                                                                int baudRate)
2401{
2402        struct edgeport_serial *edge_serial =
2403                                usb_get_serial_data(edge_port->port->serial);
2404        unsigned char *cmdBuffer;
2405        unsigned char *currCmd;
2406        int cmdLen = 0;
2407        int divisor;
2408        int status;
2409        unsigned char number =
2410                edge_port->port->number - edge_port->port->serial->minor;
2411
2412        if (edge_serial->is_epic &&
2413            !edge_serial->epic_descriptor.Supports.IOSPSetBaudRate) {
2414                dbg("SendCmdWriteBaudRate - NOT Setting baud rate for port = %d, baud = %d",
2415                    edge_port->port->number, baudRate);
2416                return 0;
2417        }
2418
2419        dbg("%s - port = %d, baud = %d", __func__,
2420                                        edge_port->port->number, baudRate);
2421
2422        status = calc_baud_rate_divisor(baudRate, &divisor);
2423        if (status) {
2424                dev_err(&edge_port->port->dev, "%s - bad baud rate\n",
2425                                                                __func__);
2426                return status;
2427        }
2428
2429        /* Alloc memory for the string of commands. */
2430        cmdBuffer =  kmalloc(0x100, GFP_ATOMIC);
2431        if (!cmdBuffer) {
2432                dev_err(&edge_port->port->dev,
2433                        "%s - kmalloc(%d) failed.\n", __func__, 0x100);
2434                return -ENOMEM;
2435        }
2436        currCmd = cmdBuffer;
2437
2438        /* Enable access to divisor latch */
2439        MAKE_CMD_WRITE_REG(&currCmd, &cmdLen, number, LCR, LCR_DL_ENABLE);
2440
2441        /* Write the divisor itself */
2442        MAKE_CMD_WRITE_REG(&currCmd, &cmdLen, number, DLL, LOW8(divisor));
2443        MAKE_CMD_WRITE_REG(&currCmd, &cmdLen, number, DLM, HIGH8(divisor));
2444
2445        /* Restore original value to disable access to divisor latch */
2446        MAKE_CMD_WRITE_REG(&currCmd, &cmdLen, number, LCR,
2447                                                edge_port->shadowLCR);
2448
2449        status = write_cmd_usb(edge_port, cmdBuffer, cmdLen);
2450        if (status) {
2451                /* something bad happened, let's free up the memory */
2452                kfree(cmdBuffer);
2453        }
2454
2455        return status;
2456}
2457
2458
2459/*****************************************************************************
2460 * calc_baud_rate_divisor
2461 *      this function calculates the proper baud rate divisor for the specified
2462 *      baud rate.
2463 *****************************************************************************/
2464static int calc_baud_rate_divisor(int baudrate, int *divisor)
2465{
2466        int i;
2467        __u16 custom;
2468
2469
2470        dbg("%s - %d", __func__, baudrate);
2471
2472        for (i = 0; i < ARRAY_SIZE(divisor_table); i++) {
2473                if (divisor_table[i].BaudRate == baudrate) {
2474                        *divisor = divisor_table[i].Divisor;
2475                        return 0;
2476                }
2477        }
2478
2479        /* We have tried all of the standard baud rates
2480         * lets try to calculate the divisor for this baud rate
2481         * Make sure the baud rate is reasonable */
2482        if (baudrate > 50 && baudrate < 230400) {
2483                /* get divisor */
2484                custom = (__u16)((230400L + baudrate/2) / baudrate);
2485
2486                *divisor = custom;
2487
2488                dbg("%s - Baud %d = %d", __func__, baudrate, custom);
2489                return 0;
2490        }
2491
2492        return -1;
2493}
2494
2495
2496/*****************************************************************************
2497 * send_cmd_write_uart_register
2498 *  this function builds up a uart register message and sends to the device.
2499 *****************************************************************************/
2500static int send_cmd_write_uart_register(struct edgeport_port *edge_port,
2501                                                __u8 regNum, __u8 regValue)
2502{
2503        struct edgeport_serial *edge_serial =
2504                                usb_get_serial_data(edge_port->port->serial);
2505        unsigned char *cmdBuffer;
2506        unsigned char *currCmd;
2507        unsigned long cmdLen = 0;
2508        int status;
2509
2510        dbg("%s - write to %s register 0x%02x",
2511                        (regNum == MCR) ? "MCR" : "LCR", __func__, regValue);
2512
2513        if (edge_serial->is_epic &&
2514            !edge_serial->epic_descriptor.Supports.IOSPWriteMCR &&
2515            regNum == MCR) {
2516                dbg("SendCmdWriteUartReg - Not writing to MCR Register");
2517                return 0;
2518        }
2519
2520        if (edge_serial->is_epic &&
2521            !edge_serial->epic_descriptor.Supports.IOSPWriteLCR &&
2522            regNum == LCR) {
2523                dbg("SendCmdWriteUartReg - Not writing to LCR Register");
2524                return 0;
2525        }
2526
2527        /* Alloc memory for the string of commands. */
2528        cmdBuffer = kmalloc(0x10, GFP_ATOMIC);
2529        if (cmdBuffer == NULL)
2530                return -ENOMEM;
2531
2532        currCmd = cmdBuffer;
2533
2534        /* Build a cmd in the buffer to write the given register */
2535        MAKE_CMD_WRITE_REG(&currCmd, &cmdLen,
2536                edge_port->port->number - edge_port->port->serial->minor,
2537                regNum, regValue);
2538
2539        status = write_cmd_usb(edge_port, cmdBuffer, cmdLen);
2540        if (status) {
2541                /* something bad happened, let's free up the memory */
2542                kfree(cmdBuffer);
2543        }
2544
2545        return status;
2546}
2547
2548
2549/*****************************************************************************
2550 * change_port_settings
2551 *      This routine is called to set the UART on the device to match the
2552 *      specified new settings.
2553 *****************************************************************************/
2554
2555static void change_port_settings(struct tty_struct *tty,
2556        struct edgeport_port *edge_port, struct ktermios *old_termios)
2557{
2558        struct edgeport_serial *edge_serial =
2559                        usb_get_serial_data(edge_port->port->serial);
2560        int baud;
2561        unsigned cflag;
2562        __u8 mask = 0xff;
2563        __u8 lData;
2564        __u8 lParity;
2565        __u8 lStop;
2566        __u8 rxFlow;
2567        __u8 txFlow;
2568        int status;
2569
2570        dbg("%s - port %d", __func__, edge_port->port->number);
2571
2572        if (!edge_port->open &&
2573            !edge_port->openPending) {
2574                dbg("%s - port not opened", __func__);
2575                return;
2576        }
2577
2578        cflag = tty->termios->c_cflag;
2579
2580        switch (cflag & CSIZE) {
2581        case CS5:
2582                lData = LCR_BITS_5; mask = 0x1f;
2583                dbg("%s - data bits = 5", __func__);
2584                break;
2585        case CS6:
2586                lData = LCR_BITS_6; mask = 0x3f;
2587                dbg("%s - data bits = 6", __func__);
2588                break;
2589        case CS7:
2590                lData = LCR_BITS_7; mask = 0x7f;
2591                dbg("%s - data bits = 7", __func__);
2592                break;
2593        default:
2594        case CS8:
2595                lData = LCR_BITS_8;
2596                dbg("%s - data bits = 8", __func__);
2597                break;
2598        }
2599
2600        lParity = LCR_PAR_NONE;
2601        if (cflag & PARENB) {
2602                if (cflag & CMSPAR) {
2603                        if (cflag & PARODD) {
2604                                lParity = LCR_PAR_MARK;
2605                                dbg("%s - parity = mark", __func__);
2606                        } else {
2607                                lParity = LCR_PAR_SPACE;
2608                                dbg("%s - parity = space", __func__);
2609                        }
2610                } else if (cflag & PARODD) {
2611                        lParity = LCR_PAR_ODD;
2612                        dbg("%s - parity = odd", __func__);
2613                } else {
2614                        lParity = LCR_PAR_EVEN;
2615                        dbg("%s - parity = even", __func__);
2616                }
2617        } else {
2618                dbg("%s - parity = none", __func__);
2619        }
2620
2621        if (cflag & CSTOPB) {
2622                lStop = LCR_STOP_2;
2623                dbg("%s - stop bits = 2", __func__);
2624        } else {
2625                lStop = LCR_STOP_1;
2626                dbg("%s - stop bits = 1", __func__);
2627        }
2628
2629        /* figure out the flow control settings */
2630        rxFlow = txFlow = 0x00;
2631        if (cflag & CRTSCTS) {
2632                rxFlow |= IOSP_RX_FLOW_RTS;
2633                txFlow |= IOSP_TX_FLOW_CTS;
2634                dbg("%s - RTS/CTS is enabled", __func__);
2635        } else {
2636                dbg("%s - RTS/CTS is disabled", __func__);
2637        }
2638
2639        /* if we are implementing XON/XOFF, set the start and stop character
2640           in the device */
2641        if (I_IXOFF(tty) || I_IXON(tty)) {
2642                unsigned char stop_char  = STOP_CHAR(tty);
2643                unsigned char start_char = START_CHAR(tty);
2644
2645                if ((!edge_serial->is_epic) ||
2646                    ((edge_serial->is_epic) &&
2647                     (edge_serial->epic_descriptor.Supports.IOSPSetXChar))) {
2648                        send_iosp_ext_cmd(edge_port,
2649                                        IOSP_CMD_SET_XON_CHAR, start_char);
2650                        send_iosp_ext_cmd(edge_port,
2651                                        IOSP_CMD_SET_XOFF_CHAR, stop_char);
2652                }
2653
2654                /* if we are implementing INBOUND XON/XOFF */
2655                if (I_IXOFF(tty)) {
2656                        rxFlow |= IOSP_RX_FLOW_XON_XOFF;
2657                        dbg("%s - INBOUND XON/XOFF is enabled, XON = %2x, XOFF = %2x",
2658                                        __func__, start_char, stop_char);
2659                } else {
2660                        dbg("%s - INBOUND XON/XOFF is disabled", __func__);
2661                }
2662
2663                /* if we are implementing OUTBOUND XON/XOFF */
2664                if (I_IXON(tty)) {
2665                        txFlow |= IOSP_TX_FLOW_XON_XOFF;
2666                        dbg("%s - OUTBOUND XON/XOFF is enabled, XON = %2x, XOFF = %2x",
2667                                        __func__, start_char, stop_char);
2668                } else {
2669                        dbg("%s - OUTBOUND XON/XOFF is disabled", __func__);
2670                }
2671        }
2672
2673        /* Set flow control to the configured value */
2674        if ((!edge_serial->is_epic) ||
2675            ((edge_serial->is_epic) &&
2676             (edge_serial->epic_descriptor.Supports.IOSPSetRxFlow)))
2677                send_iosp_ext_cmd(edge_port, IOSP_CMD_SET_RX_FLOW, rxFlow);
2678        if ((!edge_serial->is_epic) ||
2679            ((edge_serial->is_epic) &&
2680             (edge_serial->epic_descriptor.Supports.IOSPSetTxFlow)))
2681                send_iosp_ext_cmd(edge_port, IOSP_CMD_SET_TX_FLOW, txFlow);
2682
2683
2684        edge_port->shadowLCR &= ~(LCR_BITS_MASK | LCR_STOP_MASK | LCR_PAR_MASK);
2685        edge_port->shadowLCR |= (lData | lParity | lStop);
2686
2687        edge_port->validDataMask = mask;
2688
2689        /* Send the updated LCR value to the EdgePort */
2690        status = send_cmd_write_uart_register(edge_port, LCR,
2691                                                        edge_port->shadowLCR);
2692        if (status != 0)
2693                return;
2694
2695        /* set up the MCR register and send it to the EdgePort */
2696        edge_port->shadowMCR = MCR_MASTER_IE;
2697        if (cflag & CBAUD)
2698                edge_port->shadowMCR |= (MCR_DTR | MCR_RTS);
2699
2700        status = send_cmd_write_uart_register(edge_port, MCR,
2701                                                edge_port->shadowMCR);
2702        if (status != 0)
2703                return;
2704
2705        /* Determine divisor based on baud rate */
2706        baud = tty_get_baud_rate(tty);
2707        if (!baud) {
2708                /* pick a default, any default... */
2709                baud = 9600;
2710        }
2711
2712        dbg("%s - baud rate = %d", __func__, baud);
2713        status = send_cmd_write_baud_rate(edge_port, baud);
2714        if (status == -1) {
2715                /* Speed change was not possible - put back the old speed */
2716                baud = tty_termios_baud_rate(old_termios);
2717                tty_encode_baud_rate(tty, baud, baud);
2718        }
2719}
2720
2721
2722/****************************************************************************
2723 * unicode_to_ascii
2724 *      Turns a string from Unicode into ASCII.
2725 *      Doesn't do a good job with any characters that are outside the normal
2726 *      ASCII range, but it's only for debugging...
2727 *      NOTE: expects the unicode in LE format
2728 ****************************************************************************/
2729static void unicode_to_ascii(char *string, int buflen,
2730                                        __le16 *unicode, int unicode_size)
2731{
2732        int i;
2733
2734        if (buflen <= 0)        /* never happens, but... */
2735                return;
2736        --buflen;               /* space for nul */
2737
2738        for (i = 0; i < unicode_size; i++) {
2739                if (i >= buflen)
2740                        break;
2741                string[i] = (char)(le16_to_cpu(unicode[i]));
2742        }
2743        string[i] = 0x00;
2744}
2745
2746
2747/****************************************************************************
2748 * get_manufacturing_desc
2749 *      reads in the manufacturing descriptor and stores it into the serial
2750 *      structure.
2751 ****************************************************************************/
2752static void get_manufacturing_desc(struct edgeport_serial *edge_serial)
2753{
2754        int response;
2755
2756        dbg("getting manufacturer descriptor");
2757
2758        response = rom_read(edge_serial->serial,
2759                                (EDGE_MANUF_DESC_ADDR & 0xffff0000) >> 16,
2760                                (__u16)(EDGE_MANUF_DESC_ADDR & 0x0000ffff),
2761                                EDGE_MANUF_DESC_LEN,
2762                                (__u8 *)(&edge_serial->manuf_descriptor));
2763
2764        if (response < 1)
2765                dev_err(&edge_serial->serial->dev->dev,
2766                        "error in getting manufacturer descriptor\n");
2767        else {
2768                char string[30];
2769                dbg("**Manufacturer Descriptor");
2770                dbg("  RomSize:        %dK",
2771                        edge_serial->manuf_descriptor.RomSize);
2772                dbg("  RamSize:        %dK",
2773                        edge_serial->manuf_descriptor.RamSize);
2774                dbg("  CpuRev:         %d",
2775                        edge_serial->manuf_descriptor.CpuRev);
2776                dbg("  BoardRev:       %d",
2777                        edge_serial->manuf_descriptor.BoardRev);
2778                dbg("  NumPorts:       %d",
2779                        edge_serial->manuf_descriptor.NumPorts);
2780                dbg("  DescDate:       %d/%d/%d",
2781                        edge_serial->manuf_descriptor.DescDate[0],
2782                        edge_serial->manuf_descriptor.DescDate[1],
2783                        edge_serial->manuf_descriptor.DescDate[2]+1900);
2784                unicode_to_ascii(string, sizeof(string),
2785                        edge_serial->manuf_descriptor.SerialNumber,
2786                        edge_serial->manuf_descriptor.SerNumLength/2);
2787                dbg("  SerialNumber: %s", string);
2788                unicode_to_ascii(string, sizeof(string),
2789                        edge_serial->manuf_descriptor.AssemblyNumber,
2790                        edge_serial->manuf_descriptor.AssemblyNumLength/2);
2791                dbg("  AssemblyNumber: %s", string);
2792                unicode_to_ascii(string, sizeof(string),
2793                    edge_serial->manuf_descriptor.OemAssyNumber,
2794                    edge_serial->manuf_descriptor.OemAssyNumLength/2);
2795                dbg("  OemAssyNumber:  %s", string);
2796                dbg("  UartType:       %d",
2797                        edge_serial->manuf_descriptor.UartType);
2798                dbg("  IonPid:         %d",
2799                        edge_serial->manuf_descriptor.IonPid);
2800                dbg("  IonConfig:      %d",
2801                        edge_serial->manuf_descriptor.IonConfig);
2802        }
2803}
2804
2805
2806/****************************************************************************
2807 * get_boot_desc
2808 *      reads in the bootloader descriptor and stores it into the serial
2809 *      structure.
2810 ****************************************************************************/
2811static void get_boot_desc(struct edgeport_serial *edge_serial)
2812{
2813        int response;
2814
2815        dbg("getting boot descriptor");
2816
2817        response = rom_read(edge_serial->serial,
2818                                (EDGE_BOOT_DESC_ADDR & 0xffff0000) >> 16,
2819                                (__u16)(EDGE_BOOT_DESC_ADDR & 0x0000ffff),
2820                                EDGE_BOOT_DESC_LEN,
2821                                (__u8 *)(&edge_serial->boot_descriptor));
2822
2823        if (response < 1)
2824                dev_err(&edge_serial->serial->dev->dev,
2825                                "error in getting boot descriptor\n");
2826        else {
2827                dbg("**Boot Descriptor:");
2828                dbg("  BootCodeLength: %d",
2829                    le16_to_cpu(edge_serial->boot_descriptor.BootCodeLength));
2830                dbg("  MajorVersion:   %d",
2831                        edge_serial->boot_descriptor.MajorVersion);
2832                dbg("  MinorVersion:   %d",
2833                        edge_serial->boot_descriptor.MinorVersion);
2834                dbg("  BuildNumber:    %d",
2835                        le16_to_cpu(edge_serial->boot_descriptor.BuildNumber));
2836                dbg("  Capabilities:   0x%x",
2837                      le16_to_cpu(edge_serial->boot_descriptor.Capabilities));
2838                dbg("  UConfig0:       %d",
2839                        edge_serial->boot_descriptor.UConfig0);
2840                dbg("  UConfig1:       %d",
2841                        edge_serial->boot_descriptor.UConfig1);
2842        }
2843}
2844
2845
2846/****************************************************************************
2847 * load_application_firmware
2848 *      This is called to load the application firmware to the device
2849 ****************************************************************************/
2850static void load_application_firmware(struct edgeport_serial *edge_serial)
2851{
2852        const struct ihex_binrec *rec;
2853        const struct firmware *fw;
2854        const char *fw_name;
2855        const char *fw_info;
2856        int response;
2857        __u32 Operaddr;
2858        __u16 build;
2859
2860        switch (edge_serial->product_info.iDownloadFile) {
2861                case EDGE_DOWNLOAD_FILE_I930:
2862                        fw_info = "downloading firmware version (930)";
2863                        fw_name = "edgeport/down.fw";
2864                        break;
2865
2866                case EDGE_DOWNLOAD_FILE_80251:
2867                        fw_info = "downloading firmware version (80251)";
2868                        fw_name = "edgeport/down2.fw";
2869                        break;
2870
2871                case EDGE_DOWNLOAD_FILE_NONE:
2872                        dbg("No download file specified, skipping download");
2873                        return;
2874
2875                default:
2876                        return;
2877        }
2878
2879        response = request_ihex_firmware(&fw, fw_name,
2880                                    &edge_serial->serial->dev->dev);
2881        if (response) {
2882                printk(KERN_ERR "Failed to load image \"%s\" err %d\n",
2883                       fw_name, response);
2884                return;
2885        }
2886
2887        rec = (const struct ihex_binrec *)fw->data;
2888        build = (rec->data[2] << 8) | rec->data[3];
2889
2890        dbg("%s %d.%d.%d", fw_info, rec->data[0], rec->data[1], build);
2891
2892        edge_serial->product_info.FirmwareMajorVersion = rec->data[0];
2893        edge_serial->product_info.FirmwareMinorVersion = rec->data[1];
2894        edge_serial->product_info.FirmwareBuildNumber = cpu_to_le16(build);
2895
2896        for (rec = ihex_next_binrec(rec); rec;
2897             rec = ihex_next_binrec(rec)) {
2898                Operaddr = be32_to_cpu(rec->addr);
2899                response = sram_write(edge_serial->serial,
2900                                     Operaddr >> 16,
2901                                     Operaddr & 0xFFFF,
2902                                     be16_to_cpu(rec->len),
2903                                     &rec->data[0]);
2904                if (response < 0) {
2905                        dev_err(&edge_serial->serial->dev->dev,
2906                                "sram_write failed (%x, %x, %d)\n",
2907                                Operaddr >> 16, Operaddr & 0xFFFF,
2908                                be16_to_cpu(rec->len));
2909                        break;
2910                }
2911        }
2912
2913        dbg("sending exec_dl_code");
2914        response = usb_control_msg (edge_serial->serial->dev, 
2915                                    usb_sndctrlpipe(edge_serial->serial->dev, 0), 
2916                                    USB_REQUEST_ION_EXEC_DL_CODE, 
2917                                    0x40, 0x4000, 0x0001, NULL, 0, 3000);
2918
2919        release_firmware(fw);
2920}
2921
2922
2923/****************************************************************************
2924 * edge_startup
2925 ****************************************************************************/
2926static int edge_startup(struct usb_serial *serial)
2927{
2928        struct edgeport_serial *edge_serial;
2929        struct edgeport_port *edge_port;
2930        struct usb_device *dev;
2931        int i, j;
2932        int response;
2933        bool interrupt_in_found;
2934        bool bulk_in_found;
2935        bool bulk_out_found;
2936        static __u32 descriptor[3] = {  EDGE_COMPATIBILITY_MASK0,
2937                                        EDGE_COMPATIBILITY_MASK1,
2938                                        EDGE_COMPATIBILITY_MASK2 };
2939
2940        dev = serial->dev;
2941
2942        /* create our private serial structure */
2943        edge_serial = kzalloc(sizeof(struct edgeport_serial), GFP_KERNEL);
2944        if (edge_serial == NULL) {
2945                dev_err(&serial->dev->dev, "%s - Out of memory\n", __func__);
2946                return -ENOMEM;
2947        }
2948        spin_lock_init(&edge_serial->es_lock);
2949        edge_serial->serial = serial;
2950        usb_set_serial_data(serial, edge_serial);
2951
2952        /* get the name for the device from the device */
2953        i = usb_string(dev, dev->descriptor.iManufacturer,
2954            &edge_serial->name[0], MAX_NAME_LEN+1);
2955        if (i < 0)
2956                i = 0;
2957        edge_serial->name[i++] = ' ';
2958        usb_string(dev, dev->descriptor.iProduct,
2959            &edge_serial->name[i], MAX_NAME_LEN+2 - i);
2960
2961        dev_info(&serial->dev->dev, "%s detected\n", edge_serial->name);
2962
2963        /* Read the epic descriptor */
2964        if (get_epic_descriptor(edge_serial) <= 0) {
2965                /* memcpy descriptor to Supports structures */
2966                memcpy(&edge_serial->epic_descriptor.Supports, descriptor,
2967                       sizeof(struct edge_compatibility_bits));
2968
2969                /* get the manufacturing descriptor for this device */
2970                get_manufacturing_desc(edge_serial);
2971
2972                /* get the boot descriptor */
2973                get_boot_desc(edge_serial);
2974
2975                get_product_info(edge_serial);
2976        }
2977
2978        /* set the number of ports from the manufacturing description */
2979        /* serial->num_ports = serial->product_info.NumPorts; */
2980        if ((!edge_serial->is_epic) &&
2981            (edge_serial->product_info.NumPorts != serial->num_ports)) {
2982                dev_warn(&serial->dev->dev, "Device Reported %d serial ports "
2983                         "vs. core thinking we have %d ports, email "
2984                         "greg@kroah.com this information.\n",
2985                         edge_serial->product_info.NumPorts,
2986                         serial->num_ports);
2987        }
2988
2989        dbg("%s - time 1 %ld", __func__, jiffies);
2990
2991        /* If not an EPiC device */
2992        if (!edge_serial->is_epic) {
2993                /* now load the application firmware into this device */
2994                load_application_firmware(edge_serial);
2995
2996                dbg("%s - time 2 %ld", __func__, jiffies);
2997
2998                /* Check current Edgeport EEPROM and update if necessary */
2999                update_edgeport_E2PROM(edge_serial);
3000

3001                dbg("%s - time 3 %ld", __func__, jiffies);
3002
3003                /* set the configuration to use #1 */
3004/*              dbg("set_configuration 1"); */
3005/*              usb_set_configuration (dev, 1); */
3006        }
3007        dbg("  FirmwareMajorVersion  %d.%d.%d",
3008            edge_serial->product_info.FirmwareMajorVersion,
3009            edge_serial->product_info.FirmwareMinorVersion,
3010            le16_to_cpu(edge_serial->product_info.FirmwareBuildNumber));
3011
3012        /* we set up the pointers to the endpoints in the edge_open function,
3013         * as the structures aren't created yet. */
3014
3015        /* set up our port private structures */
3016        for (i = 0; i < serial->num_ports; ++i) {
3017                edge_port = kzalloc(sizeof(struct edgeport_port), GFP_KERNEL);
3018                if (edge_port == NULL) {
3019                        dev_err(&serial->dev->dev, "%s - Out of memory\n",
3020                                                                   __func__);
3021                        for (j = 0; j < i; ++j) {
3022                                kfree(usb_get_serial_port_data(serial->port[j]));
3023                                usb_set_serial_port_data(serial->port[j],
3024                                                                        NULL);
3025                        }
3026                        usb_set_serial_data(serial, NULL);
3027                        kfree(edge_serial);
3028                        return -ENOMEM;
3029                }
3030                spin_lock_init(&edge_port->ep_lock);
3031                edge_port->port = serial->port[i];
3032                usb_set_serial_port_data(serial->port[i], edge_port);
3033        }
3034
3035        response = 0;
3036
3037        if (edge_serial->is_epic) {
3038                /* EPIC thing, set up our interrupt polling now and our read
3039                 * urb, so that the device knows it really is connected. */
3040                interrupt_in_found = bulk_in_found = bulk_out_found = false;
3041                for (i = 0; i < serial->interface->altsetting[0]
3042                                                .desc.bNumEndpoints; ++i) {
3043                        struct usb_endpoint_descriptor *endpoint;
3044                        int buffer_size;
3045
3046                        endpoint = &serial->interface->altsetting[0].
3047                                                        endpoint[i].desc;
3048                        buffer_size = le16_to_cpu(endpoint->wMaxPacketSize);
3049                        if (!interrupt_in_found &&
3050                            (usb_endpoint_is_int_in(endpoint))) {
3051                                /* we found a interrupt in endpoint */
3052                                dbg("found interrupt in");
3053
3054                                /* not set up yet, so do it now */
3055                                edge_serial->interrupt_read_urb =
3056                                                usb_alloc_urb(0, GFP_KERNEL);
3057                                if (!edge_serial->interrupt_read_urb) {
3058                                        dev_err(&dev->dev, "out of memory\n");
3059                                        return -ENOMEM;
3060                                }
3061                                edge_serial->interrupt_in_buffer =
3062                                        kmalloc(buffer_size, GFP_KERNEL);
3063                                if (!edge_serial->interrupt_in_buffer) {
3064                                        dev_err(&dev->dev, "out of memory\n");
3065                                        usb_free_urb(edge_serial->interrupt_read_urb);
3066                                        return -ENOMEM;
3067                                }
3068                                edge_serial->interrupt_in_endpoint =
3069                                                endpoint->bEndpointAddress;
3070
3071                                /* set up our interrupt urb */
3072                                usb_fill_int_urb(
3073                                        edge_serial->interrupt_read_urb,
3074                                        dev,
3075                                        usb_rcvintpipe(dev,
3076                                                endpoint->bEndpointAddress),
3077                                        edge_serial->interrupt_in_buffer,
3078                                        buffer_size,
3079                                        edge_interrupt_callback,
3080                                        edge_serial,
3081                                        endpoint->bInterval);
3082
3083                                interrupt_in_found = true;
3084                        }
3085
3086                        if (!bulk_in_found &&
3087                                (usb_endpoint_is_bulk_in(endpoint))) {
3088                                /* we found a bulk in endpoint */
3089                                dbg("found bulk in");
3090
3091                                /* not set up yet, so do it now */
3092                                edge_serial->read_urb =
3093                                                usb_alloc_urb(0, GFP_KERNEL);
3094                                if (!edge_serial->read_urb) {
3095                                        dev_err(&dev->dev, "out of memory\n");
3096                                        return -ENOMEM;
3097                                }
3098                                edge_serial->bulk_in_buffer =
3099                                        kmalloc(buffer_size, GFP_KERNEL);
3100                                if (!edge_serial->bulk_in_buffer) {
3101                                        dev_err(&dev->dev, "out of memory\n");
3102                                        usb_free_urb(edge_serial->read_urb);
3103                                        return -ENOMEM;
3104                                }
3105                                edge_serial->bulk_in_endpoint =
3106                                                endpoint->bEndpointAddress;
3107
3108                                /* set up our bulk in urb */
3109                                usb_fill_bulk_urb(edge_serial->read_urb, dev,
3110                                        usb_rcvbulkpipe(dev,
3111                                                endpoint->bEndpointAddress),
3112                                        edge_serial->bulk_in_buffer,
3113                                        le16_to_cpu(endpoint->wMaxPacketSize),
3114                                        edge_bulk_in_callback,
3115                                        edge_serial);
3116                                bulk_in_found = true;
3117                        }
3118
3119                        if (!bulk_out_found &&
3120                            (usb_endpoint_is_bulk_out(endpoint))) {
3121                                /* we found a bulk out endpoint */
3122                                dbg("found bulk out");
3123                                edge_serial->bulk_out_endpoint =
3124                                                endpoint->bEndpointAddress;
3125                                bulk_out_found = true;
3126                        }
3127                }
3128
3129                if (!interrupt_in_found || !bulk_in_found || !bulk_out_found) {
3130                        dev_err(&dev->dev, "Error - the proper endpoints "
3131                                "were not found!\n");
3132                        return -ENODEV;
3133                }
3134
3135                /* start interrupt read for this edgeport this interrupt will
3136                 * continue as long as the edgeport is connected */
3137                response = usb_submit_urb(edge_serial->interrupt_read_urb,
3138                                                                GFP_KERNEL);
3139                if (response)
3140                        dev_err(&dev->dev,
3141                                "%s - Error %d submitting control urb\n",
3142                                __func__, response);
3143        }
3144        return response;
3145}
3146
3147
3148/****************************************************************************
3149 * edge_disconnect
3150 *      This function is called whenever the device is removed from the usb bus.
3151 ****************************************************************************/
3152static void edge_disconnect(struct usb_serial *serial)
3153{
3154        struct edgeport_serial *edge_serial = usb_get_serial_data(serial);
3155
3156        dbg("%s", __func__);
3157
3158        /* stop reads and writes on all ports */
3159        /* free up our endpoint stuff */
3160        if (edge_serial->is_epic) {
3161                usb_kill_urb(edge_serial->interrupt_read_urb);
3162                usb_free_urb(edge_serial->interrupt_read_urb);
3163                kfree(edge_serial->interrupt_in_buffer);
3164
3165                usb_kill_urb(edge_serial->read_urb);
3166                usb_free_urb(edge_serial->read_urb);
3167                kfree(edge_serial->bulk_in_buffer);
3168        }
3169}
3170
3171
3172/****************************************************************************
3173 * edge_release
3174 *      This function is called when the device structure is deallocated.
3175 ****************************************************************************/
3176static void edge_release(struct usb_serial *serial)
3177{
3178        struct edgeport_serial *edge_serial = usb_get_serial_data(serial);
3179        int i;
3180
3181        dbg("%s", __func__);
3182
3183        for (i = 0; i < serial->num_ports; ++i)
3184                kfree(usb_get_serial_port_data(serial->port[i]));
3185
3186        kfree(edge_serial);
3187}
3188
3189
3190/****************************************************************************
3191 * edgeport_init
3192 *      This is called by the module subsystem, or on startup to initialize us
3193 ****************************************************************************/
3194static int __init edgeport_init(void)
3195{
3196        int retval;
3197
3198        retval = usb_serial_register(&edgeport_2port_device);
3199        if (retval)
3200                goto failed_2port_device_register;
3201        retval = usb_serial_register(&edgeport_4port_device);
3202        if (retval)
3203                goto failed_4port_device_register;
3204        retval = usb_serial_register(&edgeport_8port_device);
3205        if (retval)
3206                goto failed_8port_device_register;
3207        retval = usb_serial_register(&epic_device);
3208        if (retval)
3209                goto failed_epic_device_register;
3210        retval = usb_register(&io_driver);
3211        if (retval)
3212                goto failed_usb_register;
3213        atomic_set(&CmdUrbs, 0);
3214        printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_VERSION ":"
3215               DRIVER_DESC "\n");
3216        return 0;
3217
3218failed_usb_register:
3219        usb_serial_deregister(&epic_device);
3220failed_epic_device_register:
3221        usb_serial_deregister(&edgeport_8port_device);
3222failed_8port_device_register:
3223        usb_serial_deregister(&edgeport_4port_device);
3224failed_4port_device_register:
3225        usb_serial_deregister(&edgeport_2port_device);
3226failed_2port_device_register:
3227        return retval;
3228}
3229
3230
3231/****************************************************************************
3232 * edgeport_exit
3233 *      Called when the driver is about to be unloaded.
3234 ****************************************************************************/
3235static void __exit edgeport_exit (void)
3236{
3237        usb_deregister(&io_driver);
3238        usb_serial_deregister(&edgeport_2port_device);
3239        usb_serial_deregister(&edgeport_4port_device);
3240        usb_serial_deregister(&edgeport_8port_device);
3241        usb_serial_deregister(&epic_device);
3242}
3243
3244module_init(edgeport_init);
3245module_exit(edgeport_exit);
3246
3247/* Module information */
3248MODULE_AUTHOR(DRIVER_AUTHOR);
3249MODULE_DESCRIPTION(DRIVER_DESC);
3250MODULE_LICENSE("GPL");
3251MODULE_FIRMWARE("edgeport/boot.fw");
3252MODULE_FIRMWARE("edgeport/boot2.fw");
3253MODULE_FIRMWARE("edgeport/down.fw");
3254MODULE_FIRMWARE("edgeport/down2.fw");
3255
3256module_param(debug, bool, S_IRUGO | S_IWUSR);
3257MODULE_PARM_DESC(debug, "Debug enabled or not");
3258