linux/drivers/usb/serial/io_edgeport.c
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   1// SPDX-License-Identifier: GPL-2.0+
   2/*
   3 * Edgeport USB Serial Converter driver
   4 *
   5 * Copyright (C) 2000 Inside Out Networks, All rights reserved.
   6 * Copyright (C) 2001-2002 Greg Kroah-Hartman <greg@kroah.com>
   7 *
   8 * Supports the following devices:
   9 *      Edgeport/4
  10 *      Edgeport/4t
  11 *      Edgeport/2
  12 *      Edgeport/4i
  13 *      Edgeport/2i
  14 *      Edgeport/421
  15 *      Edgeport/21
  16 *      Rapidport/4
  17 *      Edgeport/8
  18 *      Edgeport/2D8
  19 *      Edgeport/4D8
  20 *      Edgeport/8i
  21 *
  22 * For questions or problems with this driver, contact Inside Out
  23 * Networks technical support, or Peter Berger <pberger@brimson.com>,
  24 * or Al Borchers <alborchers@steinerpoint.com>.
  25 *
  26 */
  27
  28#include <linux/kernel.h>
  29#include <linux/jiffies.h>
  30#include <linux/errno.h>
  31#include <linux/slab.h>
  32#include <linux/tty.h>
  33#include <linux/tty_driver.h>
  34#include <linux/tty_flip.h>
  35#include <linux/module.h>
  36#include <linux/spinlock.h>
  37#include <linux/serial.h>
  38#include <linux/ioctl.h>
  39#include <linux/wait.h>
  40#include <linux/firmware.h>
  41#include <linux/ihex.h>
  42#include <linux/uaccess.h>
  43#include <linux/usb.h>
  44#include <linux/usb/serial.h>
  45#include "io_edgeport.h"
  46#include "io_ionsp.h"           /* info for the iosp messages */
  47#include "io_16654.h"           /* 16654 UART defines */
  48
  49#define DRIVER_AUTHOR "Greg Kroah-Hartman <greg@kroah.com> and David Iacovelli"
  50#define DRIVER_DESC "Edgeport USB Serial Driver"
  51
  52#define MAX_NAME_LEN            64
  53
  54#define OPEN_TIMEOUT            (5*HZ)          /* 5 seconds */
  55
  56static const struct usb_device_id edgeport_2port_id_table[] = {
  57        { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_2) },
  58        { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_2I) },
  59        { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_421) },
  60        { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_21) },
  61        { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_2_DIN) },
  62        { }
  63};
  64
  65static const struct usb_device_id edgeport_4port_id_table[] = {
  66        { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_4) },
  67        { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_RAPIDPORT_4) },
  68        { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_4T) },
  69        { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_MT4X56USB) },
  70        { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_4I) },
  71        { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_8_DUAL_CPU) },
  72        { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_4_DIN) },
  73        { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_22I) },
  74        { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_412_4) },
  75        { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_COMPATIBLE) },
  76        { }
  77};
  78
  79static const struct usb_device_id edgeport_8port_id_table[] = {
  80        { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_8) },
  81        { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_16_DUAL_CPU) },
  82        { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_8I) },
  83        { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_8R) },
  84        { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_8RR) },
  85        { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_412_8) },
  86        { }
  87};
  88
  89static const struct usb_device_id Epic_port_id_table[] = {
  90        { USB_DEVICE(USB_VENDOR_ID_NCR, NCR_DEVICE_ID_EPIC_0202) },
  91        { USB_DEVICE(USB_VENDOR_ID_NCR, NCR_DEVICE_ID_EPIC_0203) },
  92        { USB_DEVICE(USB_VENDOR_ID_NCR, NCR_DEVICE_ID_EPIC_0310) },
  93        { USB_DEVICE(USB_VENDOR_ID_NCR, NCR_DEVICE_ID_EPIC_0311) },
  94        { USB_DEVICE(USB_VENDOR_ID_NCR, NCR_DEVICE_ID_EPIC_0312) },
  95        { USB_DEVICE(USB_VENDOR_ID_AXIOHM, AXIOHM_DEVICE_ID_EPIC_A758) },
  96        { USB_DEVICE(USB_VENDOR_ID_AXIOHM, AXIOHM_DEVICE_ID_EPIC_A794) },
  97        { USB_DEVICE(USB_VENDOR_ID_AXIOHM, AXIOHM_DEVICE_ID_EPIC_A225) },
  98        { }
  99};
 100
 101/* Devices that this driver supports */
 102static const struct usb_device_id id_table_combined[] = {
 103        { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_4) },
 104        { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_RAPIDPORT_4) },
 105        { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_4T) },
 106        { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_MT4X56USB) },
 107        { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_2) },
 108        { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_4I) },
 109        { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_2I) },
 110        { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_421) },
 111        { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_21) },
 112        { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_8_DUAL_CPU) },
 113        { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_8) },
 114        { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_2_DIN) },
 115        { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_4_DIN) },
 116        { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_16_DUAL_CPU) },
 117        { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_22I) },
 118        { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_412_4) },
 119        { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_COMPATIBLE) },
 120        { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_8I) },
 121        { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_8R) },
 122        { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_8RR) },
 123        { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_412_8) },
 124        { USB_DEVICE(USB_VENDOR_ID_NCR, NCR_DEVICE_ID_EPIC_0202) },
 125        { USB_DEVICE(USB_VENDOR_ID_NCR, NCR_DEVICE_ID_EPIC_0203) },
 126        { USB_DEVICE(USB_VENDOR_ID_NCR, NCR_DEVICE_ID_EPIC_0310) },
 127        { USB_DEVICE(USB_VENDOR_ID_NCR, NCR_DEVICE_ID_EPIC_0311) },
 128        { USB_DEVICE(USB_VENDOR_ID_NCR, NCR_DEVICE_ID_EPIC_0312) },
 129        { USB_DEVICE(USB_VENDOR_ID_AXIOHM, AXIOHM_DEVICE_ID_EPIC_A758) },
 130        { USB_DEVICE(USB_VENDOR_ID_AXIOHM, AXIOHM_DEVICE_ID_EPIC_A794) },
 131        { USB_DEVICE(USB_VENDOR_ID_AXIOHM, AXIOHM_DEVICE_ID_EPIC_A225) },
 132        { } /* Terminating entry */
 133};
 134
 135MODULE_DEVICE_TABLE(usb, id_table_combined);
 136
 137
 138/* receive port state */
 139enum RXSTATE {
 140        EXPECT_HDR1 = 0,    /* Expect header byte 1 */
 141        EXPECT_HDR2 = 1,    /* Expect header byte 2 */
 142        EXPECT_DATA = 2,    /* Expect 'RxBytesRemaining' data */
 143        EXPECT_HDR3 = 3,    /* Expect header byte 3 (for status hdrs only) */
 144};
 145
 146
 147/* Transmit Fifo
 148 * This Transmit queue is an extension of the edgeport Rx buffer.
 149 * The maximum amount of data buffered in both the edgeport
 150 * Rx buffer (maxTxCredits) and this buffer will never exceed maxTxCredits.
 151 */
 152struct TxFifo {
 153        unsigned int    head;   /* index to head pointer (write) */
 154        unsigned int    tail;   /* index to tail pointer (read)  */
 155        unsigned int    count;  /* Bytes in queue */
 156        unsigned int    size;   /* Max size of queue (equal to Max number of TxCredits) */
 157        unsigned char   *fifo;  /* allocated Buffer */
 158};
 159
 160/* This structure holds all of the local port information */
 161struct edgeport_port {
 162        __u16                   txCredits;              /* our current credits for this port */
 163        __u16                   maxTxCredits;           /* the max size of the port */
 164
 165        struct TxFifo           txfifo;                 /* transmit fifo -- size will be maxTxCredits */
 166        struct urb              *write_urb;             /* write URB for this port */
 167        bool                    write_in_progress;      /* 'true' while a write URB is outstanding */
 168        spinlock_t              ep_lock;
 169
 170        __u8                    shadowLCR;              /* last LCR value received */
 171        __u8                    shadowMCR;              /* last MCR value received */
 172        __u8                    shadowMSR;              /* last MSR value received */
 173        __u8                    shadowLSR;              /* last LSR value received */
 174        __u8                    shadowXonChar;          /* last value set as XON char in Edgeport */
 175        __u8                    shadowXoffChar;         /* last value set as XOFF char in Edgeport */
 176        __u8                    validDataMask;
 177        __u32                   baudRate;
 178
 179        bool                    open;
 180        bool                    openPending;
 181        bool                    commandPending;
 182        bool                    closePending;
 183        bool                    chaseResponsePending;
 184
 185        wait_queue_head_t       wait_chase;             /* for handling sleeping while waiting for chase to finish */
 186        wait_queue_head_t       wait_open;              /* for handling sleeping while waiting for open to finish */
 187        wait_queue_head_t       wait_command;           /* for handling sleeping while waiting for command to finish */
 188
 189        struct usb_serial_port  *port;                  /* loop back to the owner of this object */
 190};
 191
 192
 193/* This structure holds all of the individual device information */
 194struct edgeport_serial {
 195        char                    name[MAX_NAME_LEN+2];           /* string name of this device */
 196
 197        struct edge_manuf_descriptor    manuf_descriptor;       /* the manufacturer descriptor */
 198        struct edge_boot_descriptor     boot_descriptor;        /* the boot firmware descriptor */
 199        struct edgeport_product_info    product_info;           /* Product Info */
 200        struct edge_compatibility_descriptor epic_descriptor;   /* Edgeport compatible descriptor */
 201        int                     is_epic;                        /* flag if EPiC device or not */
 202
 203        __u8                    interrupt_in_endpoint;          /* the interrupt endpoint handle */
 204        unsigned char           *interrupt_in_buffer;           /* the buffer we use for the interrupt endpoint */
 205        struct urb              *interrupt_read_urb;            /* our interrupt urb */
 206
 207        __u8                    bulk_in_endpoint;               /* the bulk in endpoint handle */
 208        unsigned char           *bulk_in_buffer;                /* the buffer we use for the bulk in endpoint */
 209        struct urb              *read_urb;                      /* our bulk read urb */
 210        bool                    read_in_progress;
 211        spinlock_t              es_lock;
 212
 213        __u8                    bulk_out_endpoint;              /* the bulk out endpoint handle */
 214
 215        __s16                   rxBytesAvail;                   /* the number of bytes that we need to read from this device */
 216
 217        enum RXSTATE            rxState;                        /* the current state of the bulk receive processor */
 218        __u8                    rxHeader1;                      /* receive header byte 1 */
 219        __u8                    rxHeader2;                      /* receive header byte 2 */
 220        __u8                    rxHeader3;                      /* receive header byte 3 */
 221        __u8                    rxPort;                         /* the port that we are currently receiving data for */
 222        __u8                    rxStatusCode;                   /* the receive status code */
 223        __u8                    rxStatusParam;                  /* the receive status paramater */
 224        __s16                   rxBytesRemaining;               /* the number of port bytes left to read */
 225        struct usb_serial       *serial;                        /* loop back to the owner of this object */
 226};
 227
 228/* baud rate information */
 229struct divisor_table_entry {
 230        __u32   BaudRate;
 231        __u16  Divisor;
 232};
 233
 234/*
 235 * Define table of divisors for Rev A EdgePort/4 hardware
 236 * These assume a 3.6864MHz crystal, the standard /16, and
 237 * MCR.7 = 0.
 238 */
 239
 240static const struct divisor_table_entry divisor_table[] = {
 241        {   50,         4608},
 242        {   75,         3072},
 243        {   110,        2095},  /* 2094.545455 => 230450   => .0217 % over */
 244        {   134,        1713},  /* 1713.011152 => 230398.5 => .00065% under */
 245        {   150,        1536},
 246        {   300,        768},
 247        {   600,        384},
 248        {   1200,       192},
 249        {   1800,       128},
 250        {   2400,       96},
 251        {   4800,       48},
 252        {   7200,       32},
 253        {   9600,       24},
 254        {   14400,      16},
 255        {   19200,      12},
 256        {   38400,      6},
 257        {   57600,      4},
 258        {   115200,     2},
 259        {   230400,     1},
 260};
 261
 262/* Number of outstanding Command Write Urbs */
 263static atomic_t CmdUrbs = ATOMIC_INIT(0);
 264
 265
 266/* local function prototypes */
 267
 268/* function prototypes for all URB callbacks */
 269static void edge_interrupt_callback(struct urb *urb);
 270static void edge_bulk_in_callback(struct urb *urb);
 271static void edge_bulk_out_data_callback(struct urb *urb);
 272static void edge_bulk_out_cmd_callback(struct urb *urb);
 273
 274/* function prototypes for the usbserial callbacks */
 275static int edge_open(struct tty_struct *tty, struct usb_serial_port *port);
 276static void edge_close(struct usb_serial_port *port);
 277static int edge_write(struct tty_struct *tty, struct usb_serial_port *port,
 278                                        const unsigned char *buf, int count);
 279static int edge_write_room(struct tty_struct *tty);
 280static int edge_chars_in_buffer(struct tty_struct *tty);
 281static void edge_throttle(struct tty_struct *tty);
 282static void edge_unthrottle(struct tty_struct *tty);
 283static void edge_set_termios(struct tty_struct *tty,
 284                                        struct usb_serial_port *port,
 285                                        struct ktermios *old_termios);
 286static int  edge_ioctl(struct tty_struct *tty,
 287                                        unsigned int cmd, unsigned long arg);
 288static void edge_break(struct tty_struct *tty, int break_state);
 289static int  edge_tiocmget(struct tty_struct *tty);
 290static int  edge_tiocmset(struct tty_struct *tty,
 291                                        unsigned int set, unsigned int clear);
 292static int  edge_startup(struct usb_serial *serial);
 293static void edge_disconnect(struct usb_serial *serial);
 294static void edge_release(struct usb_serial *serial);
 295static int edge_port_probe(struct usb_serial_port *port);
 296static int edge_port_remove(struct usb_serial_port *port);
 297
 298/* function prototypes for all of our local functions */
 299
 300static void  process_rcvd_data(struct edgeport_serial *edge_serial,
 301                                unsigned char *buffer, __u16 bufferLength);
 302static void process_rcvd_status(struct edgeport_serial *edge_serial,
 303                                __u8 byte2, __u8 byte3);
 304static void edge_tty_recv(struct usb_serial_port *port, unsigned char *data,
 305                int length);
 306static void handle_new_msr(struct edgeport_port *edge_port, __u8 newMsr);
 307static void handle_new_lsr(struct edgeport_port *edge_port, __u8 lsrData,
 308                                __u8 lsr, __u8 data);
 309static int  send_iosp_ext_cmd(struct edgeport_port *edge_port, __u8 command,
 310                                __u8 param);
 311static int  calc_baud_rate_divisor(struct device *dev, int baud_rate, int *divisor);
 312static int  send_cmd_write_baud_rate(struct edgeport_port *edge_port,
 313                                int baudRate);
 314static void change_port_settings(struct tty_struct *tty,
 315                                struct edgeport_port *edge_port,
 316                                struct ktermios *old_termios);
 317static int  send_cmd_write_uart_register(struct edgeport_port *edge_port,
 318                                __u8 regNum, __u8 regValue);
 319static int  write_cmd_usb(struct edgeport_port *edge_port,
 320                                unsigned char *buffer, int writeLength);
 321static void send_more_port_data(struct edgeport_serial *edge_serial,
 322                                struct edgeport_port *edge_port);
 323
 324static int sram_write(struct usb_serial *serial, __u16 extAddr, __u16 addr,
 325                                        __u16 length, const __u8 *data);
 326static int rom_read(struct usb_serial *serial, __u16 extAddr, __u16 addr,
 327                                                __u16 length, __u8 *data);
 328static int rom_write(struct usb_serial *serial, __u16 extAddr, __u16 addr,
 329                                        __u16 length, const __u8 *data);
 330static void get_manufacturing_desc(struct edgeport_serial *edge_serial);
 331static void get_boot_desc(struct edgeport_serial *edge_serial);
 332static void load_application_firmware(struct edgeport_serial *edge_serial);
 333
 334static void unicode_to_ascii(char *string, int buflen,
 335                                __le16 *unicode, int unicode_size);
 336
 337
 338/* ************************************************************************ */
 339/* ************************************************************************ */
 340/* ************************************************************************ */
 341/* ************************************************************************ */
 342
 343/************************************************************************
 344 *                                                                      *
 345 * update_edgeport_E2PROM()     Compare current versions of             *
 346 *                              Boot ROM and Manufacture                *
 347 *                              Descriptors with versions               *
 348 *                              embedded in this driver                 *
 349 *                                                                      *
 350 ************************************************************************/
 351static void update_edgeport_E2PROM(struct edgeport_serial *edge_serial)
 352{
 353        struct device *dev = &edge_serial->serial->dev->dev;
 354        __u32 BootCurVer;
 355        __u32 BootNewVer;
 356        __u8 BootMajorVersion;
 357        __u8 BootMinorVersion;
 358        __u16 BootBuildNumber;
 359        __u32 Bootaddr;
 360        const struct ihex_binrec *rec;
 361        const struct firmware *fw;
 362        const char *fw_name;
 363        int response;
 364
 365        switch (edge_serial->product_info.iDownloadFile) {
 366        case EDGE_DOWNLOAD_FILE_I930:
 367                fw_name = "edgeport/boot.fw";
 368                break;
 369        case EDGE_DOWNLOAD_FILE_80251:
 370                fw_name = "edgeport/boot2.fw";
 371                break;
 372        default:
 373                return;
 374        }
 375
 376        response = request_ihex_firmware(&fw, fw_name,
 377                                         &edge_serial->serial->dev->dev);
 378        if (response) {
 379                dev_err(dev, "Failed to load image \"%s\" err %d\n",
 380                       fw_name, response);
 381                return;
 382        }
 383
 384        rec = (const struct ihex_binrec *)fw->data;
 385        BootMajorVersion = rec->data[0];
 386        BootMinorVersion = rec->data[1];
 387        BootBuildNumber = (rec->data[2] << 8) | rec->data[3];
 388
 389        /* Check Boot Image Version */
 390        BootCurVer = (edge_serial->boot_descriptor.MajorVersion << 24) +
 391                     (edge_serial->boot_descriptor.MinorVersion << 16) +
 392                      le16_to_cpu(edge_serial->boot_descriptor.BuildNumber);
 393
 394        BootNewVer = (BootMajorVersion << 24) +
 395                     (BootMinorVersion << 16) +
 396                      BootBuildNumber;
 397
 398        dev_dbg(dev, "Current Boot Image version %d.%d.%d\n",
 399            edge_serial->boot_descriptor.MajorVersion,
 400            edge_serial->boot_descriptor.MinorVersion,
 401            le16_to_cpu(edge_serial->boot_descriptor.BuildNumber));
 402
 403
 404        if (BootNewVer > BootCurVer) {
 405                dev_dbg(dev, "**Update Boot Image from %d.%d.%d to %d.%d.%d\n",
 406                    edge_serial->boot_descriptor.MajorVersion,
 407                    edge_serial->boot_descriptor.MinorVersion,
 408                    le16_to_cpu(edge_serial->boot_descriptor.BuildNumber),
 409                    BootMajorVersion, BootMinorVersion, BootBuildNumber);
 410
 411                dev_dbg(dev, "Downloading new Boot Image\n");
 412
 413                for (rec = ihex_next_binrec(rec); rec;
 414                     rec = ihex_next_binrec(rec)) {
 415                        Bootaddr = be32_to_cpu(rec->addr);
 416                        response = rom_write(edge_serial->serial,
 417                                             Bootaddr >> 16,
 418                                             Bootaddr & 0xFFFF,
 419                                             be16_to_cpu(rec->len),
 420                                             &rec->data[0]);
 421                        if (response < 0) {
 422                                dev_err(&edge_serial->serial->dev->dev,
 423                                        "rom_write failed (%x, %x, %d)\n",
 424                                        Bootaddr >> 16, Bootaddr & 0xFFFF,
 425                                        be16_to_cpu(rec->len));
 426                                break;
 427                        }
 428                }
 429        } else {
 430                dev_dbg(dev, "Boot Image -- already up to date\n");
 431        }
 432        release_firmware(fw);
 433}
 434
 435#if 0
 436/************************************************************************
 437 *
 438 *  Get string descriptor from device
 439 *
 440 ************************************************************************/
 441static int get_string_desc(struct usb_device *dev, int Id,
 442                                struct usb_string_descriptor **pRetDesc)
 443{
 444        struct usb_string_descriptor StringDesc;
 445        struct usb_string_descriptor *pStringDesc;
 446
 447        dev_dbg(&dev->dev, "%s - USB String ID = %d\n", __func__, Id);
 448
 449        if (!usb_get_descriptor(dev, USB_DT_STRING, Id, &StringDesc,
 450                                                sizeof(StringDesc)))
 451                return 0;
 452
 453        pStringDesc = kmalloc(StringDesc.bLength, GFP_KERNEL);
 454        if (!pStringDesc)
 455                return -1;
 456
 457        if (!usb_get_descriptor(dev, USB_DT_STRING, Id, pStringDesc,
 458                                                        StringDesc.bLength)) {
 459                kfree(pStringDesc);
 460                return -1;
 461        }
 462
 463        *pRetDesc = pStringDesc;
 464        return 0;
 465}
 466#endif
 467
 468static void dump_product_info(struct edgeport_serial *edge_serial,
 469                              struct edgeport_product_info *product_info)
 470{
 471        struct device *dev = &edge_serial->serial->dev->dev;
 472
 473        /* Dump Product Info structure */
 474        dev_dbg(dev, "**Product Information:\n");
 475        dev_dbg(dev, "  ProductId             %x\n", product_info->ProductId);
 476        dev_dbg(dev, "  NumPorts              %d\n", product_info->NumPorts);
 477        dev_dbg(dev, "  ProdInfoVer           %d\n", product_info->ProdInfoVer);
 478        dev_dbg(dev, "  IsServer              %d\n", product_info->IsServer);
 479        dev_dbg(dev, "  IsRS232               %d\n", product_info->IsRS232);
 480        dev_dbg(dev, "  IsRS422               %d\n", product_info->IsRS422);
 481        dev_dbg(dev, "  IsRS485               %d\n", product_info->IsRS485);
 482        dev_dbg(dev, "  RomSize               %d\n", product_info->RomSize);
 483        dev_dbg(dev, "  RamSize               %d\n", product_info->RamSize);
 484        dev_dbg(dev, "  CpuRev                %x\n", product_info->CpuRev);
 485        dev_dbg(dev, "  BoardRev              %x\n", product_info->BoardRev);
 486        dev_dbg(dev, "  BootMajorVersion      %d.%d.%d\n",
 487                product_info->BootMajorVersion,
 488                product_info->BootMinorVersion,
 489                le16_to_cpu(product_info->BootBuildNumber));
 490        dev_dbg(dev, "  FirmwareMajorVersion  %d.%d.%d\n",
 491                product_info->FirmwareMajorVersion,
 492                product_info->FirmwareMinorVersion,
 493                le16_to_cpu(product_info->FirmwareBuildNumber));
 494        dev_dbg(dev, "  ManufactureDescDate   %d/%d/%d\n",
 495                product_info->ManufactureDescDate[0],
 496                product_info->ManufactureDescDate[1],
 497                product_info->ManufactureDescDate[2]+1900);
 498        dev_dbg(dev, "  iDownloadFile         0x%x\n",
 499                product_info->iDownloadFile);
 500        dev_dbg(dev, "  EpicVer               %d\n", product_info->EpicVer);
 501}
 502
 503static void get_product_info(struct edgeport_serial *edge_serial)
 504{
 505        struct edgeport_product_info *product_info = &edge_serial->product_info;
 506
 507        memset(product_info, 0, sizeof(struct edgeport_product_info));
 508
 509        product_info->ProductId = (__u16)(le16_to_cpu(edge_serial->serial->dev->descriptor.idProduct) & ~ION_DEVICE_ID_80251_NETCHIP);
 510        product_info->NumPorts = edge_serial->manuf_descriptor.NumPorts;
 511        product_info->ProdInfoVer = 0;
 512
 513        product_info->RomSize = edge_serial->manuf_descriptor.RomSize;
 514        product_info->RamSize = edge_serial->manuf_descriptor.RamSize;
 515        product_info->CpuRev = edge_serial->manuf_descriptor.CpuRev;
 516        product_info->BoardRev = edge_serial->manuf_descriptor.BoardRev;
 517
 518        product_info->BootMajorVersion =
 519                                edge_serial->boot_descriptor.MajorVersion;
 520        product_info->BootMinorVersion =
 521                                edge_serial->boot_descriptor.MinorVersion;
 522        product_info->BootBuildNumber =
 523                                edge_serial->boot_descriptor.BuildNumber;
 524
 525        memcpy(product_info->ManufactureDescDate,
 526                        edge_serial->manuf_descriptor.DescDate,
 527                        sizeof(edge_serial->manuf_descriptor.DescDate));
 528
 529        /* check if this is 2nd generation hardware */
 530        if (le16_to_cpu(edge_serial->serial->dev->descriptor.idProduct)
 531                                            & ION_DEVICE_ID_80251_NETCHIP)
 532                product_info->iDownloadFile = EDGE_DOWNLOAD_FILE_80251;
 533        else
 534                product_info->iDownloadFile = EDGE_DOWNLOAD_FILE_I930;
 535
 536        /* Determine Product type and set appropriate flags */
 537        switch (DEVICE_ID_FROM_USB_PRODUCT_ID(product_info->ProductId)) {
 538        case ION_DEVICE_ID_EDGEPORT_COMPATIBLE:
 539        case ION_DEVICE_ID_EDGEPORT_4T:
 540        case ION_DEVICE_ID_EDGEPORT_4:
 541        case ION_DEVICE_ID_EDGEPORT_2:
 542        case ION_DEVICE_ID_EDGEPORT_8_DUAL_CPU:
 543        case ION_DEVICE_ID_EDGEPORT_8:
 544        case ION_DEVICE_ID_EDGEPORT_421:
 545        case ION_DEVICE_ID_EDGEPORT_21:
 546        case ION_DEVICE_ID_EDGEPORT_2_DIN:
 547        case ION_DEVICE_ID_EDGEPORT_4_DIN:
 548        case ION_DEVICE_ID_EDGEPORT_16_DUAL_CPU:
 549                product_info->IsRS232 = 1;
 550                break;
 551
 552        case ION_DEVICE_ID_EDGEPORT_2I: /* Edgeport/2 RS422/RS485 */
 553                product_info->IsRS422 = 1;
 554                product_info->IsRS485 = 1;
 555                break;
 556
 557        case ION_DEVICE_ID_EDGEPORT_8I: /* Edgeport/4 RS422 */
 558        case ION_DEVICE_ID_EDGEPORT_4I: /* Edgeport/4 RS422 */
 559                product_info->IsRS422 = 1;
 560                break;
 561        }
 562
 563        dump_product_info(edge_serial, product_info);
 564}
 565
 566static int get_epic_descriptor(struct edgeport_serial *ep)
 567{
 568        int result;
 569        struct usb_serial *serial = ep->serial;
 570        struct edgeport_product_info *product_info = &ep->product_info;
 571        struct edge_compatibility_descriptor *epic;
 572        struct edge_compatibility_bits *bits;
 573        struct device *dev = &serial->dev->dev;
 574
 575        ep->is_epic = 0;
 576
 577        epic = kmalloc(sizeof(*epic), GFP_KERNEL);
 578        if (!epic)
 579                return -ENOMEM;
 580
 581        result = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
 582                                 USB_REQUEST_ION_GET_EPIC_DESC,
 583                                 0xC0, 0x00, 0x00,
 584                                 epic, sizeof(*epic),
 585                                 300);
 586        if (result == sizeof(*epic)) {
 587                ep->is_epic = 1;
 588                memcpy(&ep->epic_descriptor, epic, sizeof(*epic));
 589                memset(product_info, 0, sizeof(struct edgeport_product_info));
 590
 591                product_info->NumPorts = epic->NumPorts;
 592                product_info->ProdInfoVer = 0;
 593                product_info->FirmwareMajorVersion = epic->MajorVersion;
 594                product_info->FirmwareMinorVersion = epic->MinorVersion;
 595                product_info->FirmwareBuildNumber = epic->BuildNumber;
 596                product_info->iDownloadFile = epic->iDownloadFile;
 597                product_info->EpicVer = epic->EpicVer;
 598                product_info->Epic = epic->Supports;
 599                product_info->ProductId = ION_DEVICE_ID_EDGEPORT_COMPATIBLE;
 600                dump_product_info(ep, product_info);
 601
 602                bits = &ep->epic_descriptor.Supports;
 603                dev_dbg(dev, "**EPIC descriptor:\n");
 604                dev_dbg(dev, "  VendEnableSuspend: %s\n", bits->VendEnableSuspend ? "TRUE": "FALSE");
 605                dev_dbg(dev, "  IOSPOpen         : %s\n", bits->IOSPOpen        ? "TRUE": "FALSE");
 606                dev_dbg(dev, "  IOSPClose        : %s\n", bits->IOSPClose       ? "TRUE": "FALSE");
 607                dev_dbg(dev, "  IOSPChase        : %s\n", bits->IOSPChase       ? "TRUE": "FALSE");
 608                dev_dbg(dev, "  IOSPSetRxFlow    : %s\n", bits->IOSPSetRxFlow   ? "TRUE": "FALSE");
 609                dev_dbg(dev, "  IOSPSetTxFlow    : %s\n", bits->IOSPSetTxFlow   ? "TRUE": "FALSE");
 610                dev_dbg(dev, "  IOSPSetXChar     : %s\n", bits->IOSPSetXChar    ? "TRUE": "FALSE");
 611                dev_dbg(dev, "  IOSPRxCheck      : %s\n", bits->IOSPRxCheck     ? "TRUE": "FALSE");
 612                dev_dbg(dev, "  IOSPSetClrBreak  : %s\n", bits->IOSPSetClrBreak ? "TRUE": "FALSE");
 613                dev_dbg(dev, "  IOSPWriteMCR     : %s\n", bits->IOSPWriteMCR    ? "TRUE": "FALSE");
 614                dev_dbg(dev, "  IOSPWriteLCR     : %s\n", bits->IOSPWriteLCR    ? "TRUE": "FALSE");
 615                dev_dbg(dev, "  IOSPSetBaudRate  : %s\n", bits->IOSPSetBaudRate ? "TRUE": "FALSE");
 616                dev_dbg(dev, "  TrueEdgeport     : %s\n", bits->TrueEdgeport    ? "TRUE": "FALSE");
 617
 618                result = 0;
 619        } else if (result >= 0) {
 620                dev_warn(&serial->interface->dev, "short epic descriptor received: %d\n",
 621                         result);
 622                result = -EIO;
 623        }
 624
 625        kfree(epic);
 626
 627        return result;
 628}
 629
 630
 631/************************************************************************/
 632/************************************************************************/
 633/*            U S B  C A L L B A C K   F U N C T I O N S                */
 634/*            U S B  C A L L B A C K   F U N C T I O N S                */
 635/************************************************************************/
 636/************************************************************************/
 637
 638/*****************************************************************************
 639 * edge_interrupt_callback
 640 *      this is the callback function for when we have received data on the
 641 *      interrupt endpoint.
 642 *****************************************************************************/
 643static void edge_interrupt_callback(struct urb *urb)
 644{
 645        struct edgeport_serial *edge_serial = urb->context;
 646        struct device *dev;
 647        struct edgeport_port *edge_port;
 648        struct usb_serial_port *port;
 649        unsigned char *data = urb->transfer_buffer;
 650        int length = urb->actual_length;
 651        unsigned long flags;
 652        int bytes_avail;
 653        int position;
 654        int txCredits;
 655        int portNumber;
 656        int result;
 657        int status = urb->status;
 658
 659        switch (status) {
 660        case 0:
 661                /* success */
 662                break;
 663        case -ECONNRESET:
 664        case -ENOENT:
 665        case -ESHUTDOWN:
 666                /* this urb is terminated, clean up */
 667                dev_dbg(&urb->dev->dev, "%s - urb shutting down with status: %d\n", __func__, status);
 668                return;
 669        default:
 670                dev_dbg(&urb->dev->dev, "%s - nonzero urb status received: %d\n", __func__, status);
 671                goto exit;
 672        }
 673
 674        dev = &edge_serial->serial->dev->dev;
 675
 676        /* process this interrupt-read even if there are no ports open */
 677        if (length) {
 678                usb_serial_debug_data(dev, __func__, length, data);
 679
 680                if (length > 1) {
 681                        bytes_avail = data[0] | (data[1] << 8);
 682                        if (bytes_avail) {
 683                                spin_lock_irqsave(&edge_serial->es_lock, flags);
 684                                edge_serial->rxBytesAvail += bytes_avail;
 685                                dev_dbg(dev,
 686                                        "%s - bytes_avail=%d, rxBytesAvail=%d, read_in_progress=%d\n",
 687                                        __func__, bytes_avail,
 688                                        edge_serial->rxBytesAvail,
 689                                        edge_serial->read_in_progress);
 690
 691                                if (edge_serial->rxBytesAvail > 0 &&
 692                                    !edge_serial->read_in_progress) {
 693                                        dev_dbg(dev, "%s - posting a read\n", __func__);
 694                                        edge_serial->read_in_progress = true;
 695
 696                                        /* we have pending bytes on the
 697                                           bulk in pipe, send a request */
 698                                        result = usb_submit_urb(edge_serial->read_urb, GFP_ATOMIC);
 699                                        if (result) {
 700                                                dev_err(dev,
 701                                                        "%s - usb_submit_urb(read bulk) failed with result = %d\n",
 702                                                        __func__, result);
 703                                                edge_serial->read_in_progress = false;
 704                                        }
 705                                }
 706                                spin_unlock_irqrestore(&edge_serial->es_lock,
 707                                                       flags);
 708                        }
 709                }
 710                /* grab the txcredits for the ports if available */
 711                position = 2;
 712                portNumber = 0;
 713                while ((position < length) &&
 714                                (portNumber < edge_serial->serial->num_ports)) {
 715                        txCredits = data[position] | (data[position+1] << 8);
 716                        if (txCredits) {
 717                                port = edge_serial->serial->port[portNumber];
 718                                edge_port = usb_get_serial_port_data(port);
 719                                if (edge_port && edge_port->open) {
 720                                        spin_lock_irqsave(&edge_port->ep_lock,
 721                                                          flags);
 722                                        edge_port->txCredits += txCredits;
 723                                        spin_unlock_irqrestore(&edge_port->ep_lock,
 724                                                               flags);
 725                                        dev_dbg(dev, "%s - txcredits for port%d = %d\n",
 726                                                __func__, portNumber,
 727                                                edge_port->txCredits);
 728
 729                                        /* tell the tty driver that something
 730                                           has changed */
 731                                        tty_port_tty_wakeup(&edge_port->port->port);
 732                                        /* Since we have more credit, check
 733                                           if more data can be sent */
 734                                        send_more_port_data(edge_serial,
 735                                                                edge_port);
 736                                }
 737                        }
 738                        position += 2;
 739                        ++portNumber;
 740                }
 741        }
 742
 743exit:
 744        result = usb_submit_urb(urb, GFP_ATOMIC);
 745        if (result)
 746                dev_err(&urb->dev->dev,
 747                        "%s - Error %d submitting control urb\n",
 748                                                __func__, result);
 749}
 750
 751
 752/*****************************************************************************
 753 * edge_bulk_in_callback
 754 *      this is the callback function for when we have received data on the
 755 *      bulk in endpoint.
 756 *****************************************************************************/
 757static void edge_bulk_in_callback(struct urb *urb)
 758{
 759        struct edgeport_serial  *edge_serial = urb->context;
 760        struct device *dev;
 761        unsigned char           *data = urb->transfer_buffer;
 762        int                     retval;
 763        __u16                   raw_data_length;
 764        int status = urb->status;
 765        unsigned long flags;
 766
 767        if (status) {
 768                dev_dbg(&urb->dev->dev, "%s - nonzero read bulk status received: %d\n",
 769                        __func__, status);
 770                edge_serial->read_in_progress = false;
 771                return;
 772        }
 773
 774        if (urb->actual_length == 0) {
 775                dev_dbg(&urb->dev->dev, "%s - read bulk callback with no data\n", __func__);
 776                edge_serial->read_in_progress = false;
 777                return;
 778        }
 779
 780        dev = &edge_serial->serial->dev->dev;
 781        raw_data_length = urb->actual_length;
 782
 783        usb_serial_debug_data(dev, __func__, raw_data_length, data);
 784
 785        spin_lock_irqsave(&edge_serial->es_lock, flags);
 786
 787        /* decrement our rxBytes available by the number that we just got */
 788        edge_serial->rxBytesAvail -= raw_data_length;
 789
 790        dev_dbg(dev, "%s - Received = %d, rxBytesAvail %d\n", __func__,
 791                raw_data_length, edge_serial->rxBytesAvail);
 792
 793        process_rcvd_data(edge_serial, data, urb->actual_length);
 794
 795        /* check to see if there's any more data for us to read */
 796        if (edge_serial->rxBytesAvail > 0) {
 797                dev_dbg(dev, "%s - posting a read\n", __func__);
 798                retval = usb_submit_urb(edge_serial->read_urb, GFP_ATOMIC);
 799                if (retval) {
 800                        dev_err(dev,
 801                                "%s - usb_submit_urb(read bulk) failed, retval = %d\n",
 802                                __func__, retval);
 803                        edge_serial->read_in_progress = false;
 804                }
 805        } else {
 806                edge_serial->read_in_progress = false;
 807        }
 808
 809        spin_unlock_irqrestore(&edge_serial->es_lock, flags);
 810}
 811
 812
 813/*****************************************************************************
 814 * edge_bulk_out_data_callback
 815 *      this is the callback function for when we have finished sending
 816 *      serial data on the bulk out endpoint.
 817 *****************************************************************************/
 818static void edge_bulk_out_data_callback(struct urb *urb)
 819{
 820        struct edgeport_port *edge_port = urb->context;
 821        int status = urb->status;
 822
 823        if (status) {
 824                dev_dbg(&urb->dev->dev,
 825                        "%s - nonzero write bulk status received: %d\n",
 826                        __func__, status);
 827        }
 828
 829        if (edge_port->open)
 830                tty_port_tty_wakeup(&edge_port->port->port);
 831
 832        /* Release the Write URB */
 833        edge_port->write_in_progress = false;
 834
 835        /* Check if more data needs to be sent */
 836        send_more_port_data((struct edgeport_serial *)
 837                (usb_get_serial_data(edge_port->port->serial)), edge_port);
 838}
 839
 840
 841/*****************************************************************************
 842 * BulkOutCmdCallback
 843 *      this is the callback function for when we have finished sending a
 844 *      command on the bulk out endpoint.
 845 *****************************************************************************/
 846static void edge_bulk_out_cmd_callback(struct urb *urb)
 847{
 848        struct edgeport_port *edge_port = urb->context;
 849        int status = urb->status;
 850
 851        atomic_dec(&CmdUrbs);
 852        dev_dbg(&urb->dev->dev, "%s - FREE URB %p (outstanding %d)\n",
 853                __func__, urb, atomic_read(&CmdUrbs));
 854
 855
 856        /* clean up the transfer buffer */
 857        kfree(urb->transfer_buffer);
 858
 859        /* Free the command urb */
 860        usb_free_urb(urb);
 861
 862        if (status) {
 863                dev_dbg(&urb->dev->dev,
 864                        "%s - nonzero write bulk status received: %d\n",
 865                        __func__, status);
 866                return;
 867        }
 868
 869        /* tell the tty driver that something has changed */
 870        if (edge_port->open)
 871                tty_port_tty_wakeup(&edge_port->port->port);
 872
 873        /* we have completed the command */
 874        edge_port->commandPending = false;
 875        wake_up(&edge_port->wait_command);
 876}
 877
 878
 879/*****************************************************************************
 880 * Driver tty interface functions
 881 *****************************************************************************/
 882
 883/*****************************************************************************
 884 * SerialOpen
 885 *      this function is called by the tty driver when a port is opened
 886 *      If successful, we return 0
 887 *      Otherwise we return a negative error number.
 888 *****************************************************************************/
 889static int edge_open(struct tty_struct *tty, struct usb_serial_port *port)
 890{
 891        struct edgeport_port *edge_port = usb_get_serial_port_data(port);
 892        struct device *dev = &port->dev;
 893        struct usb_serial *serial;
 894        struct edgeport_serial *edge_serial;
 895        int response;
 896
 897        if (edge_port == NULL)
 898                return -ENODEV;
 899
 900        /* see if we've set up our endpoint info yet (can't set it up
 901           in edge_startup as the structures were not set up at that time.) */
 902        serial = port->serial;
 903        edge_serial = usb_get_serial_data(serial);
 904        if (edge_serial == NULL)
 905                return -ENODEV;
 906        if (edge_serial->interrupt_in_buffer == NULL) {
 907                struct usb_serial_port *port0 = serial->port[0];
 908
 909                /* not set up yet, so do it now */
 910                edge_serial->interrupt_in_buffer =
 911                                        port0->interrupt_in_buffer;
 912                edge_serial->interrupt_in_endpoint =
 913                                        port0->interrupt_in_endpointAddress;
 914                edge_serial->interrupt_read_urb = port0->interrupt_in_urb;
 915                edge_serial->bulk_in_buffer = port0->bulk_in_buffer;
 916                edge_serial->bulk_in_endpoint =
 917                                        port0->bulk_in_endpointAddress;
 918                edge_serial->read_urb = port0->read_urb;
 919                edge_serial->bulk_out_endpoint =
 920                                        port0->bulk_out_endpointAddress;
 921
 922                /* set up our interrupt urb */
 923                usb_fill_int_urb(edge_serial->interrupt_read_urb,
 924                      serial->dev,
 925                      usb_rcvintpipe(serial->dev,
 926                                port0->interrupt_in_endpointAddress),
 927                      port0->interrupt_in_buffer,
 928                      edge_serial->interrupt_read_urb->transfer_buffer_length,
 929                      edge_interrupt_callback, edge_serial,
 930                      edge_serial->interrupt_read_urb->interval);
 931
 932                /* set up our bulk in urb */
 933                usb_fill_bulk_urb(edge_serial->read_urb, serial->dev,
 934                        usb_rcvbulkpipe(serial->dev,
 935                                port0->bulk_in_endpointAddress),
 936                        port0->bulk_in_buffer,
 937                        edge_serial->read_urb->transfer_buffer_length,
 938                        edge_bulk_in_callback, edge_serial);
 939                edge_serial->read_in_progress = false;
 940
 941                /* start interrupt read for this edgeport
 942                 * this interrupt will continue as long
 943                 * as the edgeport is connected */
 944                response = usb_submit_urb(edge_serial->interrupt_read_urb,
 945                                                                GFP_KERNEL);
 946                if (response) {
 947                        dev_err(dev, "%s - Error %d submitting control urb\n",
 948                                __func__, response);
 949                }
 950        }
 951
 952        /* initialize our wait queues */
 953        init_waitqueue_head(&edge_port->wait_open);
 954        init_waitqueue_head(&edge_port->wait_chase);
 955        init_waitqueue_head(&edge_port->wait_command);
 956
 957        /* initialize our port settings */
 958        edge_port->txCredits = 0;       /* Can't send any data yet */
 959        /* Must always set this bit to enable ints! */
 960        edge_port->shadowMCR = MCR_MASTER_IE;
 961        edge_port->chaseResponsePending = false;
 962
 963        /* send a open port command */
 964        edge_port->openPending = true;
 965        edge_port->open        = false;
 966        response = send_iosp_ext_cmd(edge_port, IOSP_CMD_OPEN_PORT, 0);
 967
 968        if (response < 0) {
 969                dev_err(dev, "%s - error sending open port command\n", __func__);
 970                edge_port->openPending = false;
 971                return -ENODEV;
 972        }
 973
 974        /* now wait for the port to be completely opened */
 975        wait_event_timeout(edge_port->wait_open, !edge_port->openPending,
 976                                                                OPEN_TIMEOUT);
 977
 978        if (!edge_port->open) {
 979                /* open timed out */
 980                dev_dbg(dev, "%s - open timedout\n", __func__);
 981                edge_port->openPending = false;
 982                return -ENODEV;
 983        }
 984
 985        /* create the txfifo */
 986        edge_port->txfifo.head  = 0;
 987        edge_port->txfifo.tail  = 0;
 988        edge_port->txfifo.count = 0;
 989        edge_port->txfifo.size  = edge_port->maxTxCredits;
 990        edge_port->txfifo.fifo  = kmalloc(edge_port->maxTxCredits, GFP_KERNEL);
 991
 992        if (!edge_port->txfifo.fifo) {
 993                edge_close(port);
 994                return -ENOMEM;
 995        }
 996
 997        /* Allocate a URB for the write */
 998        edge_port->write_urb = usb_alloc_urb(0, GFP_KERNEL);
 999        edge_port->write_in_progress = false;
1000
1001        if (!edge_port->write_urb) {
1002                edge_close(port);
1003                return -ENOMEM;
1004        }
1005
1006        dev_dbg(dev, "%s - Initialize TX fifo to %d bytes\n",
1007                __func__, edge_port->maxTxCredits);
1008
1009        return 0;
1010}
1011
1012
1013/************************************************************************
1014 *
1015 * block_until_chase_response
1016 *
1017 *      This function will block the close until one of the following:
1018 *              1. Response to our Chase comes from Edgeport
1019 *              2. A timeout of 10 seconds without activity has expired
1020 *                 (1K of Edgeport data @ 2400 baud ==> 4 sec to empty)
1021 *
1022 ************************************************************************/
1023static void block_until_chase_response(struct edgeport_port *edge_port)
1024{
1025        struct device *dev = &edge_port->port->dev;
1026        DEFINE_WAIT(wait);
1027        __u16 lastCredits;
1028        int timeout = 1*HZ;
1029        int loop = 10;
1030
1031        while (1) {
1032                /* Save Last credits */
1033                lastCredits = edge_port->txCredits;
1034
1035                /* Did we get our Chase response */
1036                if (!edge_port->chaseResponsePending) {
1037                        dev_dbg(dev, "%s - Got Chase Response\n", __func__);
1038
1039                        /* did we get all of our credit back? */
1040                        if (edge_port->txCredits == edge_port->maxTxCredits) {
1041                                dev_dbg(dev, "%s - Got all credits\n", __func__);
1042                                return;
1043                        }
1044                }
1045
1046                /* Block the thread for a while */
1047                prepare_to_wait(&edge_port->wait_chase, &wait,
1048                                                TASK_UNINTERRUPTIBLE);
1049                schedule_timeout(timeout);
1050                finish_wait(&edge_port->wait_chase, &wait);
1051
1052                if (lastCredits == edge_port->txCredits) {
1053                        /* No activity.. count down. */
1054                        loop--;
1055                        if (loop == 0) {
1056                                edge_port->chaseResponsePending = false;
1057                                dev_dbg(dev, "%s - Chase TIMEOUT\n", __func__);
1058                                return;
1059                        }
1060                } else {
1061                        /* Reset timeout value back to 10 seconds */
1062                        dev_dbg(dev, "%s - Last %d, Current %d\n", __func__,
1063                                        lastCredits, edge_port->txCredits);
1064                        loop = 10;
1065                }
1066        }
1067}
1068
1069
1070/************************************************************************
1071 *
1072 * block_until_tx_empty
1073 *
1074 *      This function will block the close until one of the following:
1075 *              1. TX count are 0
1076 *              2. The edgeport has stopped
1077 *              3. A timeout of 3 seconds without activity has expired
1078 *
1079 ************************************************************************/
1080static void block_until_tx_empty(struct edgeport_port *edge_port)
1081{
1082        struct device *dev = &edge_port->port->dev;
1083        DEFINE_WAIT(wait);
1084        struct TxFifo *fifo = &edge_port->txfifo;
1085        __u32 lastCount;
1086        int timeout = HZ/10;
1087        int loop = 30;
1088
1089        while (1) {
1090                /* Save Last count */
1091                lastCount = fifo->count;
1092
1093                /* Is the Edgeport Buffer empty? */
1094                if (lastCount == 0) {
1095                        dev_dbg(dev, "%s - TX Buffer Empty\n", __func__);
1096                        return;
1097                }
1098
1099                /* Block the thread for a while */
1100                prepare_to_wait(&edge_port->wait_chase, &wait,
1101                                                TASK_UNINTERRUPTIBLE);
1102                schedule_timeout(timeout);
1103                finish_wait(&edge_port->wait_chase, &wait);
1104
1105                dev_dbg(dev, "%s wait\n", __func__);
1106
1107                if (lastCount == fifo->count) {
1108                        /* No activity.. count down. */
1109                        loop--;
1110                        if (loop == 0) {
1111                                dev_dbg(dev, "%s - TIMEOUT\n", __func__);
1112                                return;
1113                        }
1114                } else {
1115                        /* Reset timeout value back to seconds */
1116                        loop = 30;
1117                }
1118        }
1119}
1120
1121
1122/*****************************************************************************
1123 * edge_close
1124 *      this function is called by the tty driver when a port is closed
1125 *****************************************************************************/
1126static void edge_close(struct usb_serial_port *port)
1127{
1128        struct edgeport_serial *edge_serial;
1129        struct edgeport_port *edge_port;
1130        int status;
1131
1132        edge_serial = usb_get_serial_data(port->serial);
1133        edge_port = usb_get_serial_port_data(port);
1134        if (edge_serial == NULL || edge_port == NULL)
1135                return;
1136
1137        /* block until tx is empty */
1138        block_until_tx_empty(edge_port);
1139
1140        edge_port->closePending = true;
1141
1142        if (!edge_serial->is_epic ||
1143            edge_serial->epic_descriptor.Supports.IOSPChase) {
1144                /* flush and chase */
1145                edge_port->chaseResponsePending = true;
1146
1147                dev_dbg(&port->dev, "%s - Sending IOSP_CMD_CHASE_PORT\n", __func__);
1148                status = send_iosp_ext_cmd(edge_port, IOSP_CMD_CHASE_PORT, 0);
1149                if (status == 0)
1150                        /* block until chase finished */
1151                        block_until_chase_response(edge_port);
1152                else
1153                        edge_port->chaseResponsePending = false;
1154        }
1155
1156        if (!edge_serial->is_epic ||
1157            edge_serial->epic_descriptor.Supports.IOSPClose) {
1158               /* close the port */
1159                dev_dbg(&port->dev, "%s - Sending IOSP_CMD_CLOSE_PORT\n", __func__);
1160                send_iosp_ext_cmd(edge_port, IOSP_CMD_CLOSE_PORT, 0);
1161        }
1162
1163        /* port->close = true; */
1164        edge_port->closePending = false;
1165        edge_port->open = false;
1166        edge_port->openPending = false;
1167
1168        usb_kill_urb(edge_port->write_urb);
1169
1170        if (edge_port->write_urb) {
1171                /* if this urb had a transfer buffer already
1172                                (old transfer) free it */
1173                kfree(edge_port->write_urb->transfer_buffer);
1174                usb_free_urb(edge_port->write_urb);
1175                edge_port->write_urb = NULL;
1176        }
1177        kfree(edge_port->txfifo.fifo);
1178        edge_port->txfifo.fifo = NULL;
1179}
1180
1181/*****************************************************************************
1182 * SerialWrite
1183 *      this function is called by the tty driver when data should be written
1184 *      to the port.
1185 *      If successful, we return the number of bytes written, otherwise we
1186 *      return a negative error number.
1187 *****************************************************************************/
1188static int edge_write(struct tty_struct *tty, struct usb_serial_port *port,
1189                                        const unsigned char *data, int count)
1190{
1191        struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1192        struct TxFifo *fifo;
1193        int copySize;
1194        int bytesleft;
1195        int firsthalf;
1196        int secondhalf;
1197        unsigned long flags;
1198
1199        if (edge_port == NULL)
1200                return -ENODEV;
1201
1202        /* get a pointer to the Tx fifo */
1203        fifo = &edge_port->txfifo;
1204
1205        spin_lock_irqsave(&edge_port->ep_lock, flags);
1206
1207        /* calculate number of bytes to put in fifo */
1208        copySize = min((unsigned int)count,
1209                                (edge_port->txCredits - fifo->count));
1210
1211        dev_dbg(&port->dev, "%s of %d byte(s) Fifo room  %d -- will copy %d bytes\n",
1212                __func__, count, edge_port->txCredits - fifo->count, copySize);
1213
1214        /* catch writes of 0 bytes which the tty driver likes to give us,
1215           and when txCredits is empty */
1216        if (copySize == 0) {
1217                dev_dbg(&port->dev, "%s - copySize = Zero\n", __func__);
1218                goto finish_write;
1219        }
1220
1221        /* queue the data
1222         * since we can never overflow the buffer we do not have to check for a
1223         * full condition
1224         *
1225         * the copy is done is two parts -- first fill to the end of the buffer
1226         * then copy the reset from the start of the buffer
1227         */
1228        bytesleft = fifo->size - fifo->head;
1229        firsthalf = min(bytesleft, copySize);
1230        dev_dbg(&port->dev, "%s - copy %d bytes of %d into fifo \n", __func__,
1231                firsthalf, bytesleft);
1232
1233        /* now copy our data */
1234        memcpy(&fifo->fifo[fifo->head], data, firsthalf);
1235        usb_serial_debug_data(&port->dev, __func__, firsthalf, &fifo->fifo[fifo->head]);
1236
1237        /* update the index and size */
1238        fifo->head  += firsthalf;
1239        fifo->count += firsthalf;
1240
1241        /* wrap the index */
1242        if (fifo->head == fifo->size)
1243                fifo->head = 0;
1244
1245        secondhalf = copySize-firsthalf;
1246
1247        if (secondhalf) {
1248                dev_dbg(&port->dev, "%s - copy rest of data %d\n", __func__, secondhalf);
1249                memcpy(&fifo->fifo[fifo->head], &data[firsthalf], secondhalf);
1250                usb_serial_debug_data(&port->dev, __func__, secondhalf, &fifo->fifo[fifo->head]);
1251                /* update the index and size */
1252                fifo->count += secondhalf;
1253                fifo->head  += secondhalf;
1254                /* No need to check for wrap since we can not get to end of
1255                 * the fifo in this part
1256                 */
1257        }
1258
1259finish_write:
1260        spin_unlock_irqrestore(&edge_port->ep_lock, flags);
1261
1262        send_more_port_data((struct edgeport_serial *)
1263                        usb_get_serial_data(port->serial), edge_port);
1264
1265        dev_dbg(&port->dev, "%s wrote %d byte(s) TxCredits %d, Fifo %d\n",
1266                __func__, copySize, edge_port->txCredits, fifo->count);
1267
1268        return copySize;
1269}
1270
1271
1272/************************************************************************
1273 *
1274 * send_more_port_data()
1275 *
1276 *      This routine attempts to write additional UART transmit data
1277 *      to a port over the USB bulk pipe. It is called (1) when new
1278 *      data has been written to a port's TxBuffer from higher layers
1279 *      (2) when the peripheral sends us additional TxCredits indicating
1280 *      that it can accept more Tx data for a given port; and (3) when
1281 *      a bulk write completes successfully and we want to see if we
1282 *      can transmit more.
1283 *
1284 ************************************************************************/
1285static void send_more_port_data(struct edgeport_serial *edge_serial,
1286                                        struct edgeport_port *edge_port)
1287{
1288        struct TxFifo   *fifo = &edge_port->txfifo;
1289        struct device   *dev = &edge_port->port->dev;
1290        struct urb      *urb;
1291        unsigned char   *buffer;
1292        int             status;
1293        int             count;
1294        int             bytesleft;
1295        int             firsthalf;
1296        int             secondhalf;
1297        unsigned long   flags;
1298
1299        spin_lock_irqsave(&edge_port->ep_lock, flags);
1300
1301        if (edge_port->write_in_progress ||
1302            !edge_port->open             ||
1303            (fifo->count == 0)) {
1304                dev_dbg(dev, "%s EXIT - fifo %d, PendingWrite = %d\n",
1305                        __func__, fifo->count, edge_port->write_in_progress);
1306                goto exit_send;
1307        }
1308
1309        /* since the amount of data in the fifo will always fit into the
1310         * edgeport buffer we do not need to check the write length
1311         *
1312         * Do we have enough credits for this port to make it worthwhile
1313         * to bother queueing a write. If it's too small, say a few bytes,
1314         * it's better to wait for more credits so we can do a larger write.
1315         */
1316        if (edge_port->txCredits < EDGE_FW_GET_TX_CREDITS_SEND_THRESHOLD(edge_port->maxTxCredits, EDGE_FW_BULK_MAX_PACKET_SIZE)) {
1317                dev_dbg(dev, "%s Not enough credit - fifo %d TxCredit %d\n",
1318                        __func__, fifo->count, edge_port->txCredits);
1319                goto exit_send;
1320        }
1321
1322        /* lock this write */
1323        edge_port->write_in_progress = true;
1324
1325        /* get a pointer to the write_urb */
1326        urb = edge_port->write_urb;
1327
1328        /* make sure transfer buffer is freed */
1329        kfree(urb->transfer_buffer);
1330        urb->transfer_buffer = NULL;
1331
1332        /* build the data header for the buffer and port that we are about
1333           to send out */
1334        count = fifo->count;
1335        buffer = kmalloc(count+2, GFP_ATOMIC);
1336        if (!buffer) {
1337                edge_port->write_in_progress = false;
1338                goto exit_send;
1339        }
1340        buffer[0] = IOSP_BUILD_DATA_HDR1(edge_port->port->port_number, count);
1341        buffer[1] = IOSP_BUILD_DATA_HDR2(edge_port->port->port_number, count);
1342
1343        /* now copy our data */
1344        bytesleft =  fifo->size - fifo->tail;
1345        firsthalf = min(bytesleft, count);
1346        memcpy(&buffer[2], &fifo->fifo[fifo->tail], firsthalf);
1347        fifo->tail  += firsthalf;
1348        fifo->count -= firsthalf;
1349        if (fifo->tail == fifo->size)
1350                fifo->tail = 0;
1351
1352        secondhalf = count-firsthalf;
1353        if (secondhalf) {
1354                memcpy(&buffer[2+firsthalf], &fifo->fifo[fifo->tail],
1355                                                                secondhalf);
1356                fifo->tail  += secondhalf;
1357                fifo->count -= secondhalf;
1358        }
1359
1360        if (count)
1361                usb_serial_debug_data(&edge_port->port->dev, __func__, count, &buffer[2]);
1362
1363        /* fill up the urb with all of our data and submit it */
1364        usb_fill_bulk_urb(urb, edge_serial->serial->dev,
1365                        usb_sndbulkpipe(edge_serial->serial->dev,
1366                                        edge_serial->bulk_out_endpoint),
1367                        buffer, count+2,
1368                        edge_bulk_out_data_callback, edge_port);
1369
1370        /* decrement the number of credits we have by the number we just sent */
1371        edge_port->txCredits -= count;
1372        edge_port->port->icount.tx += count;
1373
1374        status = usb_submit_urb(urb, GFP_ATOMIC);
1375        if (status) {
1376                /* something went wrong */
1377                dev_err_console(edge_port->port,
1378                        "%s - usb_submit_urb(write bulk) failed, status = %d, data lost\n",
1379                                __func__, status);
1380                edge_port->write_in_progress = false;
1381
1382                /* revert the credits as something bad happened. */
1383                edge_port->txCredits += count;
1384                edge_port->port->icount.tx -= count;
1385        }
1386        dev_dbg(dev, "%s wrote %d byte(s) TxCredit %d, Fifo %d\n",
1387                __func__, count, edge_port->txCredits, fifo->count);
1388
1389exit_send:
1390        spin_unlock_irqrestore(&edge_port->ep_lock, flags);
1391}
1392
1393
1394/*****************************************************************************
1395 * edge_write_room
1396 *      this function is called by the tty driver when it wants to know how
1397 *      many bytes of data we can accept for a specific port. If successful,
1398 *      we return the amount of room that we have for this port (the txCredits)
1399 *      otherwise we return a negative error number.
1400 *****************************************************************************/
1401static int edge_write_room(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 room;
1406        unsigned long flags;
1407
1408        if (edge_port == NULL)
1409                return 0;
1410        if (edge_port->closePending)
1411                return 0;
1412
1413        if (!edge_port->open) {
1414                dev_dbg(&port->dev, "%s - port not opened\n", __func__);
1415                return 0;
1416        }
1417
1418        /* total of both buffers is still txCredit */
1419        spin_lock_irqsave(&edge_port->ep_lock, flags);
1420        room = edge_port->txCredits - edge_port->txfifo.count;
1421        spin_unlock_irqrestore(&edge_port->ep_lock, flags);
1422
1423        dev_dbg(&port->dev, "%s - returns %d\n", __func__, room);
1424        return room;
1425}
1426
1427
1428/*****************************************************************************
1429 * edge_chars_in_buffer
1430 *      this function is called by the tty driver when it wants to know how
1431 *      many bytes of data we currently have outstanding in the port (data that
1432 *      has been written, but hasn't made it out the port yet)
1433 *      If successful, we return the number of bytes left to be written in the
1434 *      system,
1435 *      Otherwise we return a negative error number.
1436 *****************************************************************************/
1437static int edge_chars_in_buffer(struct tty_struct *tty)
1438{
1439        struct usb_serial_port *port = tty->driver_data;
1440        struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1441        int num_chars;
1442        unsigned long flags;
1443
1444        if (edge_port == NULL)
1445                return 0;
1446        if (edge_port->closePending)
1447                return 0;
1448
1449        if (!edge_port->open) {
1450                dev_dbg(&port->dev, "%s - port not opened\n", __func__);
1451                return 0;
1452        }
1453
1454        spin_lock_irqsave(&edge_port->ep_lock, flags);
1455        num_chars = edge_port->maxTxCredits - edge_port->txCredits +
1456                                                edge_port->txfifo.count;
1457        spin_unlock_irqrestore(&edge_port->ep_lock, flags);
1458        if (num_chars) {
1459                dev_dbg(&port->dev, "%s - returns %d\n", __func__, num_chars);
1460        }
1461
1462        return num_chars;
1463}
1464
1465
1466/*****************************************************************************
1467 * SerialThrottle
1468 *      this function is called by the tty driver when it wants to stop the data
1469 *      being read from the port.
1470 *****************************************************************************/
1471static void edge_throttle(struct tty_struct *tty)
1472{
1473        struct usb_serial_port *port = tty->driver_data;
1474        struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1475        int status;
1476
1477        if (edge_port == NULL)
1478                return;
1479
1480        if (!edge_port->open) {
1481                dev_dbg(&port->dev, "%s - port not opened\n", __func__);
1482                return;
1483        }
1484
1485        /* if we are implementing XON/XOFF, send the stop character */
1486        if (I_IXOFF(tty)) {
1487                unsigned char stop_char = STOP_CHAR(tty);
1488                status = edge_write(tty, port, &stop_char, 1);
1489                if (status <= 0)
1490                        return;
1491        }
1492
1493        /* if we are implementing RTS/CTS, toggle that line */
1494        if (C_CRTSCTS(tty)) {
1495                edge_port->shadowMCR &= ~MCR_RTS;
1496                status = send_cmd_write_uart_register(edge_port, MCR,
1497                                                        edge_port->shadowMCR);
1498                if (status != 0)
1499                        return;
1500        }
1501}
1502
1503
1504/*****************************************************************************
1505 * edge_unthrottle
1506 *      this function is called by the tty driver when it wants to resume the
1507 *      data being read from the port (called after SerialThrottle is called)
1508 *****************************************************************************/
1509static void edge_unthrottle(struct tty_struct *tty)
1510{
1511        struct usb_serial_port *port = tty->driver_data;
1512        struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1513        int status;
1514
1515        if (edge_port == NULL)
1516                return;
1517
1518        if (!edge_port->open) {
1519                dev_dbg(&port->dev, "%s - port not opened\n", __func__);
1520                return;
1521        }
1522
1523        /* if we are implementing XON/XOFF, send the start character */
1524        if (I_IXOFF(tty)) {
1525                unsigned char start_char = START_CHAR(tty);
1526                status = edge_write(tty, port, &start_char, 1);
1527                if (status <= 0)
1528                        return;
1529        }
1530        /* if we are implementing RTS/CTS, toggle that line */
1531        if (C_CRTSCTS(tty)) {
1532                edge_port->shadowMCR |= MCR_RTS;
1533                send_cmd_write_uart_register(edge_port, MCR,
1534                                                edge_port->shadowMCR);
1535        }
1536}
1537
1538
1539/*****************************************************************************
1540 * SerialSetTermios
1541 *      this function is called by the tty driver when it wants to change
1542 * the termios structure
1543 *****************************************************************************/
1544static void edge_set_termios(struct tty_struct *tty,
1545        struct usb_serial_port *port, struct ktermios *old_termios)
1546{
1547        struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1548
1549        if (edge_port == NULL)
1550                return;
1551
1552        if (!edge_port->open) {
1553                dev_dbg(&port->dev, "%s - port not opened\n", __func__);
1554                return;
1555        }
1556
1557        /* change the port settings to the new ones specified */
1558        change_port_settings(tty, edge_port, old_termios);
1559}
1560
1561
1562/*****************************************************************************
1563 * get_lsr_info - get line status register info
1564 *
1565 * Purpose: Let user call ioctl() to get info when the UART physically
1566 *          is emptied.  On bus types like RS485, the transmitter must
1567 *          release the bus after transmitting. This must be done when
1568 *          the transmit shift register is empty, not be done when the
1569 *          transmit holding register is empty.  This functionality
1570 *          allows an RS485 driver to be written in user space.
1571 *****************************************************************************/
1572static int get_lsr_info(struct edgeport_port *edge_port,
1573                                                unsigned int __user *value)
1574{
1575        unsigned int result = 0;
1576        unsigned long flags;
1577
1578        spin_lock_irqsave(&edge_port->ep_lock, flags);
1579        if (edge_port->maxTxCredits == edge_port->txCredits &&
1580            edge_port->txfifo.count == 0) {
1581                dev_dbg(&edge_port->port->dev, "%s -- Empty\n", __func__);
1582                result = TIOCSER_TEMT;
1583        }
1584        spin_unlock_irqrestore(&edge_port->ep_lock, flags);
1585
1586        if (copy_to_user(value, &result, sizeof(int)))
1587                return -EFAULT;
1588        return 0;
1589}
1590
1591static int edge_tiocmset(struct tty_struct *tty,
1592                                        unsigned int set, unsigned int clear)
1593{
1594        struct usb_serial_port *port = tty->driver_data;
1595        struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1596        unsigned int mcr;
1597
1598        mcr = edge_port->shadowMCR;
1599        if (set & TIOCM_RTS)
1600                mcr |= MCR_RTS;
1601        if (set & TIOCM_DTR)
1602                mcr |= MCR_DTR;
1603        if (set & TIOCM_LOOP)
1604                mcr |= MCR_LOOPBACK;
1605
1606        if (clear & TIOCM_RTS)
1607                mcr &= ~MCR_RTS;
1608        if (clear & TIOCM_DTR)
1609                mcr &= ~MCR_DTR;
1610        if (clear & TIOCM_LOOP)
1611                mcr &= ~MCR_LOOPBACK;
1612
1613        edge_port->shadowMCR = mcr;
1614
1615        send_cmd_write_uart_register(edge_port, MCR, edge_port->shadowMCR);
1616
1617        return 0;
1618}
1619
1620static int edge_tiocmget(struct tty_struct *tty)
1621{
1622        struct usb_serial_port *port = tty->driver_data;
1623        struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1624        unsigned int result = 0;
1625        unsigned int msr;
1626        unsigned int mcr;
1627
1628        msr = edge_port->shadowMSR;
1629        mcr = edge_port->shadowMCR;
1630        result = ((mcr & MCR_DTR)       ? TIOCM_DTR: 0)   /* 0x002 */
1631                  | ((mcr & MCR_RTS)    ? TIOCM_RTS: 0)   /* 0x004 */
1632                  | ((msr & EDGEPORT_MSR_CTS)   ? TIOCM_CTS: 0)   /* 0x020 */
1633                  | ((msr & EDGEPORT_MSR_CD)    ? TIOCM_CAR: 0)   /* 0x040 */
1634                  | ((msr & EDGEPORT_MSR_RI)    ? TIOCM_RI:  0)   /* 0x080 */
1635                  | ((msr & EDGEPORT_MSR_DSR)   ? TIOCM_DSR: 0);  /* 0x100 */
1636
1637        return result;
1638}
1639
1640static int get_serial_info(struct tty_struct *tty,
1641                                struct serial_struct *ss)
1642{
1643        struct usb_serial_port *port = tty->driver_data;
1644        struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1645
1646        ss->type                = PORT_16550A;
1647        ss->line                = edge_port->port->minor;
1648        ss->port                = edge_port->port->port_number;
1649        ss->irq                 = 0;
1650        ss->xmit_fifo_size      = edge_port->maxTxCredits;
1651        ss->baud_base           = 9600;
1652        ss->close_delay         = 5*HZ;
1653        ss->closing_wait        = 30*HZ;
1654        return 0;
1655}
1656
1657
1658/*****************************************************************************
1659 * SerialIoctl
1660 *      this function handles any ioctl calls to the driver
1661 *****************************************************************************/
1662static int edge_ioctl(struct tty_struct *tty,
1663                                        unsigned int cmd, unsigned long arg)
1664{
1665        struct usb_serial_port *port = tty->driver_data;
1666        struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1667
1668        switch (cmd) {
1669        case TIOCSERGETLSR:
1670                dev_dbg(&port->dev, "%s TIOCSERGETLSR\n", __func__);
1671                return get_lsr_info(edge_port, (unsigned int __user *) arg);
1672        }
1673        return -ENOIOCTLCMD;
1674}
1675
1676
1677/*****************************************************************************
1678 * SerialBreak
1679 *      this function sends a break to the port
1680 *****************************************************************************/
1681static void edge_break(struct tty_struct *tty, int break_state)
1682{
1683        struct usb_serial_port *port = tty->driver_data;
1684        struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1685        struct edgeport_serial *edge_serial = usb_get_serial_data(port->serial);
1686        int status;
1687
1688        if (!edge_serial->is_epic ||
1689            edge_serial->epic_descriptor.Supports.IOSPChase) {
1690                /* flush and chase */
1691                edge_port->chaseResponsePending = true;
1692
1693                dev_dbg(&port->dev, "%s - Sending IOSP_CMD_CHASE_PORT\n", __func__);
1694                status = send_iosp_ext_cmd(edge_port, IOSP_CMD_CHASE_PORT, 0);
1695                if (status == 0) {
1696                        /* block until chase finished */
1697                        block_until_chase_response(edge_port);
1698                } else {
1699                        edge_port->chaseResponsePending = false;
1700                }
1701        }
1702
1703        if (!edge_serial->is_epic ||
1704            edge_serial->epic_descriptor.Supports.IOSPSetClrBreak) {
1705                if (break_state == -1) {
1706                        dev_dbg(&port->dev, "%s - Sending IOSP_CMD_SET_BREAK\n", __func__);
1707                        status = send_iosp_ext_cmd(edge_port,
1708                                                IOSP_CMD_SET_BREAK, 0);
1709                } else {
1710                        dev_dbg(&port->dev, "%s - Sending IOSP_CMD_CLEAR_BREAK\n", __func__);
1711                        status = send_iosp_ext_cmd(edge_port,
1712                                                IOSP_CMD_CLEAR_BREAK, 0);
1713                }
1714                if (status)
1715                        dev_dbg(&port->dev, "%s - error sending break set/clear command.\n",
1716                                __func__);
1717        }
1718}
1719
1720
1721/*****************************************************************************
1722 * process_rcvd_data
1723 *      this function handles the data received on the bulk in pipe.
1724 *****************************************************************************/
1725static void process_rcvd_data(struct edgeport_serial *edge_serial,
1726                                unsigned char *buffer, __u16 bufferLength)
1727{
1728        struct usb_serial *serial = edge_serial->serial;
1729        struct device *dev = &serial->dev->dev;
1730        struct usb_serial_port *port;
1731        struct edgeport_port *edge_port;
1732        __u16 lastBufferLength;
1733        __u16 rxLen;
1734
1735        lastBufferLength = bufferLength + 1;
1736
1737        while (bufferLength > 0) {
1738                /* failsafe incase we get a message that we don't understand */
1739                if (lastBufferLength == bufferLength) {
1740                        dev_dbg(dev, "%s - stuck in loop, exiting it.\n", __func__);
1741                        break;
1742                }
1743                lastBufferLength = bufferLength;
1744
1745                switch (edge_serial->rxState) {
1746                case EXPECT_HDR1:
1747                        edge_serial->rxHeader1 = *buffer;
1748                        ++buffer;
1749                        --bufferLength;
1750
1751                        if (bufferLength == 0) {
1752                                edge_serial->rxState = EXPECT_HDR2;
1753                                break;
1754                        }
1755                        /* Fall through */
1756                case EXPECT_HDR2:
1757                        edge_serial->rxHeader2 = *buffer;
1758                        ++buffer;
1759                        --bufferLength;
1760
1761                        dev_dbg(dev, "%s - Hdr1=%02X Hdr2=%02X\n", __func__,
1762                                edge_serial->rxHeader1, edge_serial->rxHeader2);
1763                        /* Process depending on whether this header is
1764                         * data or status */
1765
1766                        if (IS_CMD_STAT_HDR(edge_serial->rxHeader1)) {
1767                                /* Decode this status header and go to
1768                                 * EXPECT_HDR1 (if we can process the status
1769                                 * with only 2 bytes), or go to EXPECT_HDR3 to
1770                                 * get the third byte. */
1771                                edge_serial->rxPort =
1772                                    IOSP_GET_HDR_PORT(edge_serial->rxHeader1);
1773                                edge_serial->rxStatusCode =
1774                                    IOSP_GET_STATUS_CODE(
1775                                                edge_serial->rxHeader1);
1776
1777                                if (!IOSP_STATUS_IS_2BYTE(
1778                                                edge_serial->rxStatusCode)) {
1779                                        /* This status needs additional bytes.
1780                                         * Save what we have and then wait for
1781                                         * more data.
1782                                         */
1783                                        edge_serial->rxStatusParam
1784                                                = edge_serial->rxHeader2;
1785                                        edge_serial->rxState = EXPECT_HDR3;
1786                                        break;
1787                                }
1788                                /* We have all the header bytes, process the
1789                                   status now */
1790                                process_rcvd_status(edge_serial,
1791                                                edge_serial->rxHeader2, 0);
1792                                edge_serial->rxState = EXPECT_HDR1;
1793                                break;
1794                        }
1795
1796                        edge_serial->rxPort = IOSP_GET_HDR_PORT(edge_serial->rxHeader1);
1797                        edge_serial->rxBytesRemaining = IOSP_GET_HDR_DATA_LEN(edge_serial->rxHeader1,
1798                                                                              edge_serial->rxHeader2);
1799                        dev_dbg(dev, "%s - Data for Port %u Len %u\n", __func__,
1800                                edge_serial->rxPort,
1801                                edge_serial->rxBytesRemaining);
1802
1803                        if (bufferLength == 0) {
1804                                edge_serial->rxState = EXPECT_DATA;
1805                                break;
1806                        }
1807                        /* Fall through */
1808                case EXPECT_DATA: /* Expect data */
1809                        if (bufferLength < edge_serial->rxBytesRemaining) {
1810                                rxLen = bufferLength;
1811                                /* Expect data to start next buffer */
1812                                edge_serial->rxState = EXPECT_DATA;
1813                        } else {
1814                                /* BufLen >= RxBytesRemaining */
1815                                rxLen = edge_serial->rxBytesRemaining;
1816                                /* Start another header next time */
1817                                edge_serial->rxState = EXPECT_HDR1;
1818                        }
1819
1820                        bufferLength -= rxLen;
1821                        edge_serial->rxBytesRemaining -= rxLen;
1822
1823                        /* spit this data back into the tty driver if this
1824                           port is open */
1825                        if (rxLen && edge_serial->rxPort < serial->num_ports) {
1826                                port = serial->port[edge_serial->rxPort];
1827                                edge_port = usb_get_serial_port_data(port);
1828                                if (edge_port && edge_port->open) {
1829                                        dev_dbg(dev, "%s - Sending %d bytes to TTY for port %d\n",
1830                                                __func__, rxLen,
1831                                                edge_serial->rxPort);
1832                                        edge_tty_recv(edge_port->port, buffer,
1833                                                        rxLen);
1834                                        edge_port->port->icount.rx += rxLen;
1835                                }
1836                        }
1837                        buffer += rxLen;
1838                        break;
1839
1840                case EXPECT_HDR3:       /* Expect 3rd byte of status header */
1841                        edge_serial->rxHeader3 = *buffer;
1842                        ++buffer;
1843                        --bufferLength;
1844
1845                        /* We have all the header bytes, process the
1846                           status now */
1847                        process_rcvd_status(edge_serial,
1848                                edge_serial->rxStatusParam,
1849                                edge_serial->rxHeader3);
1850                        edge_serial->rxState = EXPECT_HDR1;
1851                        break;
1852                }
1853        }
1854}
1855
1856
1857/*****************************************************************************
1858 * process_rcvd_status
1859 *      this function handles the any status messages received on the
1860 *      bulk in pipe.
1861 *****************************************************************************/
1862static void process_rcvd_status(struct edgeport_serial *edge_serial,
1863                                                __u8 byte2, __u8 byte3)
1864{
1865        struct usb_serial_port *port;
1866        struct edgeport_port *edge_port;
1867        struct tty_struct *tty;
1868        struct device *dev;
1869        __u8 code = edge_serial->rxStatusCode;
1870
1871        /* switch the port pointer to the one being currently talked about */
1872        if (edge_serial->rxPort >= edge_serial->serial->num_ports)
1873                return;
1874        port = edge_serial->serial->port[edge_serial->rxPort];
1875        edge_port = usb_get_serial_port_data(port);
1876        if (edge_port == NULL) {
1877                dev_err(&edge_serial->serial->dev->dev,
1878                        "%s - edge_port == NULL for port %d\n",
1879                                        __func__, edge_serial->rxPort);
1880                return;
1881        }
1882        dev = &port->dev;
1883
1884        if (code == IOSP_EXT_STATUS) {
1885                switch (byte2) {
1886                case IOSP_EXT_STATUS_CHASE_RSP:
1887                        /* we want to do EXT status regardless of port
1888                         * open/closed */
1889                        dev_dbg(dev, "%s - Port %u EXT CHASE_RSP Data = %02x\n",
1890                                __func__, edge_serial->rxPort, byte3);
1891                        /* Currently, the only EXT_STATUS is Chase, so process
1892                         * here instead of one more call to one more subroutine
1893                         * If/when more EXT_STATUS, there'll be more work to do
1894                         * Also, we currently clear flag and close the port
1895                         * regardless of content of above's Byte3.
1896                         * We could choose to do something else when Byte3 says
1897                         * Timeout on Chase from Edgeport, like wait longer in
1898                         * block_until_chase_response, but for now we don't.
1899                         */
1900                        edge_port->chaseResponsePending = false;
1901                        wake_up(&edge_port->wait_chase);
1902                        return;
1903
1904                case IOSP_EXT_STATUS_RX_CHECK_RSP:
1905                        dev_dbg(dev, "%s ========== Port %u CHECK_RSP Sequence = %02x =============\n",
1906                                __func__, edge_serial->rxPort, byte3);
1907                        /* Port->RxCheckRsp = true; */
1908                        return;
1909                }
1910        }
1911
1912        if (code == IOSP_STATUS_OPEN_RSP) {
1913                edge_port->txCredits = GET_TX_BUFFER_SIZE(byte3);
1914                edge_port->maxTxCredits = edge_port->txCredits;
1915                dev_dbg(dev, "%s - Port %u Open Response Initial MSR = %02x TxBufferSize = %d\n",
1916                        __func__, edge_serial->rxPort, byte2, edge_port->txCredits);
1917                handle_new_msr(edge_port, byte2);
1918
1919                /* send the current line settings to the port so we are
1920                   in sync with any further termios calls */
1921                tty = tty_port_tty_get(&edge_port->port->port);
1922                if (tty) {
1923                        change_port_settings(tty,
1924                                edge_port, &tty->termios);
1925                        tty_kref_put(tty);
1926                }
1927
1928                /* we have completed the open */
1929                edge_port->openPending = false;
1930                edge_port->open = true;
1931                wake_up(&edge_port->wait_open);
1932                return;
1933        }
1934
1935        /* If port is closed, silently discard all rcvd status. We can
1936         * have cases where buffered status is received AFTER the close
1937         * port command is sent to the Edgeport.
1938         */
1939        if (!edge_port->open || edge_port->closePending)
1940                return;
1941
1942        switch (code) {
1943        /* Not currently sent by Edgeport */
1944        case IOSP_STATUS_LSR:
1945                dev_dbg(dev, "%s - Port %u LSR Status = %02x\n",
1946                        __func__, edge_serial->rxPort, byte2);
1947                handle_new_lsr(edge_port, false, byte2, 0);
1948                break;
1949
1950        case IOSP_STATUS_LSR_DATA:
1951                dev_dbg(dev, "%s - Port %u LSR Status = %02x, Data = %02x\n",
1952                        __func__, edge_serial->rxPort, byte2, byte3);
1953                /* byte2 is LSR Register */
1954                /* byte3 is broken data byte */
1955                handle_new_lsr(edge_port, true, byte2, byte3);
1956                break;
1957        /*
1958         *      case IOSP_EXT_4_STATUS:
1959         *              dev_dbg(dev, "%s - Port %u LSR Status = %02x Data = %02x\n",
1960         *                      __func__, edge_serial->rxPort, byte2, byte3);
1961         *              break;
1962         */
1963        case IOSP_STATUS_MSR:
1964                dev_dbg(dev, "%s - Port %u MSR Status = %02x\n",
1965                        __func__, edge_serial->rxPort, byte2);
1966                /*
1967                 * Process this new modem status and generate appropriate
1968                 * events, etc, based on the new status. This routine
1969                 * also saves the MSR in Port->ShadowMsr.
1970                 */
1971                handle_new_msr(edge_port, byte2);
1972                break;
1973
1974        default:
1975                dev_dbg(dev, "%s - Unrecognized IOSP status code %u\n", __func__, code);
1976                break;
1977        }
1978}
1979
1980
1981/*****************************************************************************
1982 * edge_tty_recv
1983 *      this function passes data on to the tty flip buffer
1984 *****************************************************************************/
1985static void edge_tty_recv(struct usb_serial_port *port, unsigned char *data,
1986                int length)
1987{
1988        int cnt;
1989
1990        cnt = tty_insert_flip_string(&port->port, data, length);
1991        if (cnt < length) {
1992                dev_err(&port->dev, "%s - dropping data, %d bytes lost\n",
1993                                __func__, length - cnt);
1994        }
1995        data += cnt;
1996        length -= cnt;
1997
1998        tty_flip_buffer_push(&port->port);
1999}
2000
2001
2002/*****************************************************************************
2003 * handle_new_msr
2004 *      this function handles any change to the msr register for a port.
2005 *****************************************************************************/
2006static void handle_new_msr(struct edgeport_port *edge_port, __u8 newMsr)
2007{
2008        struct  async_icount *icount;
2009
2010        if (newMsr & (EDGEPORT_MSR_DELTA_CTS | EDGEPORT_MSR_DELTA_DSR |
2011                        EDGEPORT_MSR_DELTA_RI | EDGEPORT_MSR_DELTA_CD)) {
2012                icount = &edge_port->port->icount;
2013
2014                /* update input line counters */
2015                if (newMsr & EDGEPORT_MSR_DELTA_CTS)
2016                        icount->cts++;
2017                if (newMsr & EDGEPORT_MSR_DELTA_DSR)
2018                        icount->dsr++;
2019                if (newMsr & EDGEPORT_MSR_DELTA_CD)
2020                        icount->dcd++;
2021                if (newMsr & EDGEPORT_MSR_DELTA_RI)
2022                        icount->rng++;
2023                wake_up_interruptible(&edge_port->port->port.delta_msr_wait);
2024        }
2025
2026        /* Save the new modem status */
2027        edge_port->shadowMSR = newMsr & 0xf0;
2028}
2029
2030
2031/*****************************************************************************
2032 * handle_new_lsr
2033 *      this function handles any change to the lsr register for a port.
2034 *****************************************************************************/
2035static void handle_new_lsr(struct edgeport_port *edge_port, __u8 lsrData,
2036                                                        __u8 lsr, __u8 data)
2037{
2038        __u8 newLsr = (__u8) (lsr & (__u8)
2039                (LSR_OVER_ERR | LSR_PAR_ERR | LSR_FRM_ERR | LSR_BREAK));
2040        struct async_icount *icount;
2041
2042        edge_port->shadowLSR = lsr;
2043
2044        if (newLsr & LSR_BREAK) {
2045                /*
2046                 * Parity and Framing errors only count if they
2047                 * occur exclusive of a break being
2048                 * received.
2049                 */
2050                newLsr &= (__u8)(LSR_OVER_ERR | LSR_BREAK);
2051        }
2052
2053        /* Place LSR data byte into Rx buffer */
2054        if (lsrData)
2055                edge_tty_recv(edge_port->port, &data, 1);
2056
2057        /* update input line counters */
2058        icount = &edge_port->port->icount;
2059        if (newLsr & LSR_BREAK)
2060                icount->brk++;
2061        if (newLsr & LSR_OVER_ERR)
2062                icount->overrun++;
2063        if (newLsr & LSR_PAR_ERR)
2064                icount->parity++;
2065        if (newLsr & LSR_FRM_ERR)
2066                icount->frame++;
2067}
2068
2069
2070/****************************************************************************
2071 * sram_write
2072 *      writes a number of bytes to the Edgeport device's sram starting at the
2073 *      given address.
2074 *      If successful returns the number of bytes written, otherwise it returns
2075 *      a negative error number of the problem.
2076 ****************************************************************************/
2077static int sram_write(struct usb_serial *serial, __u16 extAddr, __u16 addr,
2078                                        __u16 length, const __u8 *data)
2079{
2080        int result;
2081        __u16 current_length;
2082        unsigned char *transfer_buffer;
2083
2084        dev_dbg(&serial->dev->dev, "%s - %x, %x, %d\n", __func__, extAddr, addr, length);
2085
2086        transfer_buffer =  kmalloc(64, GFP_KERNEL);
2087        if (!transfer_buffer)
2088                return -ENOMEM;
2089
2090        /* need to split these writes up into 64 byte chunks */
2091        result = 0;
2092        while (length > 0) {
2093                if (length > 64)
2094                        current_length = 64;
2095                else
2096                        current_length = length;
2097
2098/*              dev_dbg(&serial->dev->dev, "%s - writing %x, %x, %d\n", __func__, extAddr, addr, current_length); */
2099                memcpy(transfer_buffer, data, current_length);
2100                result = usb_control_msg(serial->dev,
2101                                        usb_sndctrlpipe(serial->dev, 0),
2102                                        USB_REQUEST_ION_WRITE_RAM,
2103                                        0x40, addr, extAddr, transfer_buffer,
2104                                        current_length, 300);
2105                if (result < 0)
2106                        break;
2107                length -= current_length;
2108                addr += current_length;
2109                data += current_length;
2110        }
2111
2112        kfree(transfer_buffer);
2113        return result;
2114}
2115
2116
2117/****************************************************************************
2118 * rom_write
2119 *      writes a number of bytes to the Edgeport device's ROM starting at the
2120 *      given address.
2121 *      If successful returns the number of bytes written, otherwise it returns
2122 *      a negative error number of the problem.
2123 ****************************************************************************/
2124static int rom_write(struct usb_serial *serial, __u16 extAddr, __u16 addr,
2125                                        __u16 length, const __u8 *data)
2126{
2127        int result;
2128        __u16 current_length;
2129        unsigned char *transfer_buffer;
2130
2131        transfer_buffer =  kmalloc(64, GFP_KERNEL);
2132        if (!transfer_buffer)
2133                return -ENOMEM;
2134
2135        /* need to split these writes up into 64 byte chunks */
2136        result = 0;
2137        while (length > 0) {
2138                if (length > 64)
2139                        current_length = 64;
2140                else
2141                        current_length = length;
2142                memcpy(transfer_buffer, data, current_length);
2143                result = usb_control_msg(serial->dev,
2144                                        usb_sndctrlpipe(serial->dev, 0),
2145                                        USB_REQUEST_ION_WRITE_ROM, 0x40,
2146                                        addr, extAddr,
2147                                        transfer_buffer, current_length, 300);
2148                if (result < 0)
2149                        break;
2150                length -= current_length;
2151                addr += current_length;
2152                data += current_length;
2153        }
2154
2155        kfree(transfer_buffer);
2156        return result;
2157}
2158
2159
2160/****************************************************************************
2161 * rom_read
2162 *      reads a number of bytes from the Edgeport device starting at the given
2163 *      address.
2164 *      Returns zero on success or a negative error number.
2165 ****************************************************************************/
2166static int rom_read(struct usb_serial *serial, __u16 extAddr,
2167                                        __u16 addr, __u16 length, __u8 *data)
2168{
2169        int result;
2170        __u16 current_length;
2171        unsigned char *transfer_buffer;
2172
2173        transfer_buffer =  kmalloc(64, GFP_KERNEL);
2174        if (!transfer_buffer)
2175                return -ENOMEM;
2176
2177        /* need to split these reads up into 64 byte chunks */
2178        result = 0;
2179        while (length > 0) {
2180                if (length > 64)
2181                        current_length = 64;
2182                else
2183                        current_length = length;
2184                result = usb_control_msg(serial->dev,
2185                                        usb_rcvctrlpipe(serial->dev, 0),
2186                                        USB_REQUEST_ION_READ_ROM,
2187                                        0xC0, addr, extAddr, transfer_buffer,
2188                                        current_length, 300);
2189                if (result < current_length) {
2190                        if (result >= 0)
2191                                result = -EIO;
2192                        break;
2193                }
2194                memcpy(data, transfer_buffer, current_length);
2195                length -= current_length;
2196                addr += current_length;
2197                data += current_length;
2198
2199                result = 0;
2200        }
2201
2202        kfree(transfer_buffer);
2203        return result;
2204}
2205
2206
2207/****************************************************************************
2208 * send_iosp_ext_cmd
2209 *      Is used to send a IOSP message to the Edgeport device
2210 ****************************************************************************/
2211static int send_iosp_ext_cmd(struct edgeport_port *edge_port,
2212                                                __u8 command, __u8 param)
2213{
2214        unsigned char   *buffer;
2215        unsigned char   *currentCommand;
2216        int             length = 0;
2217        int             status = 0;
2218
2219        buffer = kmalloc(10, GFP_ATOMIC);
2220        if (!buffer)
2221                return -ENOMEM;
2222
2223        currentCommand = buffer;
2224
2225        MAKE_CMD_EXT_CMD(&currentCommand, &length, edge_port->port->port_number,
2226                         command, param);
2227
2228        status = write_cmd_usb(edge_port, buffer, length);
2229        if (status) {
2230                /* something bad happened, let's free up the memory */
2231                kfree(buffer);
2232        }
2233
2234        return status;
2235}
2236
2237
2238/*****************************************************************************
2239 * write_cmd_usb
2240 *      this function writes the given buffer out to the bulk write endpoint.
2241 *****************************************************************************/
2242static int write_cmd_usb(struct edgeport_port *edge_port,
2243                                        unsigned char *buffer, int length)
2244{
2245        struct edgeport_serial *edge_serial =
2246                                usb_get_serial_data(edge_port->port->serial);
2247        struct device *dev = &edge_port->port->dev;
2248        int status = 0;
2249        struct urb *urb;
2250
2251        usb_serial_debug_data(dev, __func__, length, buffer);
2252
2253        /* Allocate our next urb */
2254        urb = usb_alloc_urb(0, GFP_ATOMIC);
2255        if (!urb)
2256                return -ENOMEM;
2257
2258        atomic_inc(&CmdUrbs);
2259        dev_dbg(dev, "%s - ALLOCATE URB %p (outstanding %d)\n",
2260                __func__, urb, atomic_read(&CmdUrbs));
2261
2262        usb_fill_bulk_urb(urb, edge_serial->serial->dev,
2263                        usb_sndbulkpipe(edge_serial->serial->dev,
2264                                        edge_serial->bulk_out_endpoint),
2265                        buffer, length, edge_bulk_out_cmd_callback, edge_port);
2266
2267        edge_port->commandPending = true;
2268        status = usb_submit_urb(urb, GFP_ATOMIC);
2269
2270        if (status) {
2271                /* something went wrong */
2272                dev_err(dev, "%s - usb_submit_urb(write command) failed, status = %d\n",
2273                        __func__, status);
2274                usb_free_urb(urb);
2275                atomic_dec(&CmdUrbs);
2276                return status;
2277        }
2278
2279#if 0
2280        wait_event(&edge_port->wait_command, !edge_port->commandPending);
2281
2282        if (edge_port->commandPending) {
2283                /* command timed out */
2284                dev_dbg(dev, "%s - command timed out\n", __func__);
2285                status = -EINVAL;
2286        }
2287#endif
2288        return status;
2289}
2290
2291
2292/*****************************************************************************
2293 * send_cmd_write_baud_rate
2294 *      this function sends the proper command to change the baud rate of the
2295 *      specified port.
2296 *****************************************************************************/
2297static int send_cmd_write_baud_rate(struct edgeport_port *edge_port,
2298                                                                int baudRate)
2299{
2300        struct edgeport_serial *edge_serial =
2301                                usb_get_serial_data(edge_port->port->serial);
2302        struct device *dev = &edge_port->port->dev;
2303        unsigned char *cmdBuffer;
2304        unsigned char *currCmd;
2305        int cmdLen = 0;
2306        int divisor;
2307        int status;
2308        u32 number = edge_port->port->port_number;
2309
2310        if (edge_serial->is_epic &&
2311            !edge_serial->epic_descriptor.Supports.IOSPSetBaudRate) {
2312                dev_dbg(dev, "SendCmdWriteBaudRate - NOT Setting baud rate for port, baud = %d\n",
2313                        baudRate);
2314                return 0;
2315        }
2316
2317        dev_dbg(dev, "%s - baud = %d\n", __func__, baudRate);
2318
2319        status = calc_baud_rate_divisor(dev, baudRate, &divisor);
2320        if (status) {
2321                dev_err(dev, "%s - bad baud rate\n", __func__);
2322                return status;
2323        }
2324
2325        /* Alloc memory for the string of commands. */
2326        cmdBuffer =  kmalloc(0x100, GFP_ATOMIC);
2327        if (!cmdBuffer)
2328                return -ENOMEM;
2329
2330        currCmd = cmdBuffer;
2331
2332        /* Enable access to divisor latch */
2333        MAKE_CMD_WRITE_REG(&currCmd, &cmdLen, number, LCR, LCR_DL_ENABLE);
2334
2335        /* Write the divisor itself */
2336        MAKE_CMD_WRITE_REG(&currCmd, &cmdLen, number, DLL, LOW8(divisor));
2337        MAKE_CMD_WRITE_REG(&currCmd, &cmdLen, number, DLM, HIGH8(divisor));
2338
2339        /* Restore original value to disable access to divisor latch */
2340        MAKE_CMD_WRITE_REG(&currCmd, &cmdLen, number, LCR,
2341                                                edge_port->shadowLCR);
2342
2343        status = write_cmd_usb(edge_port, cmdBuffer, cmdLen);
2344        if (status) {
2345                /* something bad happened, let's free up the memory */
2346                kfree(cmdBuffer);
2347        }
2348
2349        return status;
2350}
2351
2352
2353/*****************************************************************************
2354 * calc_baud_rate_divisor
2355 *      this function calculates the proper baud rate divisor for the specified
2356 *      baud rate.
2357 *****************************************************************************/
2358static int calc_baud_rate_divisor(struct device *dev, int baudrate, int *divisor)
2359{
2360        int i;
2361        __u16 custom;
2362
2363        for (i = 0; i < ARRAY_SIZE(divisor_table); i++) {
2364                if (divisor_table[i].BaudRate == baudrate) {
2365                        *divisor = divisor_table[i].Divisor;
2366                        return 0;
2367                }
2368        }
2369
2370        /* We have tried all of the standard baud rates
2371         * lets try to calculate the divisor for this baud rate
2372         * Make sure the baud rate is reasonable */
2373        if (baudrate > 50 && baudrate < 230400) {
2374                /* get divisor */
2375                custom = (__u16)((230400L + baudrate/2) / baudrate);
2376
2377                *divisor = custom;
2378
2379                dev_dbg(dev, "%s - Baud %d = %d\n", __func__, baudrate, custom);
2380                return 0;
2381        }
2382
2383        return -1;
2384}
2385
2386
2387/*****************************************************************************
2388 * send_cmd_write_uart_register
2389 *  this function builds up a uart register message and sends to the device.
2390 *****************************************************************************/
2391static int send_cmd_write_uart_register(struct edgeport_port *edge_port,
2392                                                __u8 regNum, __u8 regValue)
2393{
2394        struct edgeport_serial *edge_serial =
2395                                usb_get_serial_data(edge_port->port->serial);
2396        struct device *dev = &edge_port->port->dev;
2397        unsigned char *cmdBuffer;
2398        unsigned char *currCmd;
2399        unsigned long cmdLen = 0;
2400        int status;
2401
2402        dev_dbg(dev, "%s - write to %s register 0x%02x\n",
2403                (regNum == MCR) ? "MCR" : "LCR", __func__, regValue);
2404
2405        if (edge_serial->is_epic &&
2406            !edge_serial->epic_descriptor.Supports.IOSPWriteMCR &&
2407            regNum == MCR) {
2408                dev_dbg(dev, "SendCmdWriteUartReg - Not writing to MCR Register\n");
2409                return 0;
2410        }
2411
2412        if (edge_serial->is_epic &&
2413            !edge_serial->epic_descriptor.Supports.IOSPWriteLCR &&
2414            regNum == LCR) {
2415                dev_dbg(dev, "SendCmdWriteUartReg - Not writing to LCR Register\n");
2416                return 0;
2417        }
2418
2419        /* Alloc memory for the string of commands. */
2420        cmdBuffer = kmalloc(0x10, GFP_ATOMIC);
2421        if (cmdBuffer == NULL)
2422                return -ENOMEM;
2423
2424        currCmd = cmdBuffer;
2425
2426        /* Build a cmd in the buffer to write the given register */
2427        MAKE_CMD_WRITE_REG(&currCmd, &cmdLen, edge_port->port->port_number,
2428                           regNum, regValue);
2429
2430        status = write_cmd_usb(edge_port, cmdBuffer, cmdLen);
2431        if (status) {
2432                /* something bad happened, let's free up the memory */
2433                kfree(cmdBuffer);
2434        }
2435
2436        return status;
2437}
2438
2439
2440/*****************************************************************************
2441 * change_port_settings
2442 *      This routine is called to set the UART on the device to match the
2443 *      specified new settings.
2444 *****************************************************************************/
2445
2446static void change_port_settings(struct tty_struct *tty,
2447        struct edgeport_port *edge_port, struct ktermios *old_termios)
2448{
2449        struct device *dev = &edge_port->port->dev;
2450        struct edgeport_serial *edge_serial =
2451                        usb_get_serial_data(edge_port->port->serial);
2452        int baud;
2453        unsigned cflag;
2454        __u8 mask = 0xff;
2455        __u8 lData;
2456        __u8 lParity;
2457        __u8 lStop;
2458        __u8 rxFlow;
2459        __u8 txFlow;
2460        int status;
2461
2462        if (!edge_port->open &&
2463            !edge_port->openPending) {
2464                dev_dbg(dev, "%s - port not opened\n", __func__);
2465                return;
2466        }
2467
2468        cflag = tty->termios.c_cflag;
2469
2470        switch (cflag & CSIZE) {
2471        case CS5:
2472                lData = LCR_BITS_5; mask = 0x1f;
2473                dev_dbg(dev, "%s - data bits = 5\n", __func__);
2474                break;
2475        case CS6:
2476                lData = LCR_BITS_6; mask = 0x3f;
2477                dev_dbg(dev, "%s - data bits = 6\n", __func__);
2478                break;
2479        case CS7:
2480                lData = LCR_BITS_7; mask = 0x7f;
2481                dev_dbg(dev, "%s - data bits = 7\n", __func__);
2482                break;
2483        default:
2484        case CS8:
2485                lData = LCR_BITS_8;
2486                dev_dbg(dev, "%s - data bits = 8\n", __func__);
2487                break;
2488        }
2489
2490        lParity = LCR_PAR_NONE;
2491        if (cflag & PARENB) {
2492                if (cflag & CMSPAR) {
2493                        if (cflag & PARODD) {
2494                                lParity = LCR_PAR_MARK;
2495                                dev_dbg(dev, "%s - parity = mark\n", __func__);
2496                        } else {
2497                                lParity = LCR_PAR_SPACE;
2498                                dev_dbg(dev, "%s - parity = space\n", __func__);
2499                        }
2500                } else if (cflag & PARODD) {
2501                        lParity = LCR_PAR_ODD;
2502                        dev_dbg(dev, "%s - parity = odd\n", __func__);
2503                } else {
2504                        lParity = LCR_PAR_EVEN;
2505                        dev_dbg(dev, "%s - parity = even\n", __func__);
2506                }
2507        } else {
2508                dev_dbg(dev, "%s - parity = none\n", __func__);
2509        }
2510
2511        if (cflag & CSTOPB) {
2512                lStop = LCR_STOP_2;
2513                dev_dbg(dev, "%s - stop bits = 2\n", __func__);
2514        } else {
2515                lStop = LCR_STOP_1;
2516                dev_dbg(dev, "%s - stop bits = 1\n", __func__);
2517        }
2518
2519        /* figure out the flow control settings */
2520        rxFlow = txFlow = 0x00;
2521        if (cflag & CRTSCTS) {
2522                rxFlow |= IOSP_RX_FLOW_RTS;
2523                txFlow |= IOSP_TX_FLOW_CTS;
2524                dev_dbg(dev, "%s - RTS/CTS is enabled\n", __func__);
2525        } else {
2526                dev_dbg(dev, "%s - RTS/CTS is disabled\n", __func__);
2527        }
2528
2529        /* if we are implementing XON/XOFF, set the start and stop character
2530           in the device */
2531        if (I_IXOFF(tty) || I_IXON(tty)) {
2532                unsigned char stop_char  = STOP_CHAR(tty);
2533                unsigned char start_char = START_CHAR(tty);
2534
2535                if (!edge_serial->is_epic ||
2536                    edge_serial->epic_descriptor.Supports.IOSPSetXChar) {
2537                        send_iosp_ext_cmd(edge_port,
2538                                        IOSP_CMD_SET_XON_CHAR, start_char);
2539                        send_iosp_ext_cmd(edge_port,
2540                                        IOSP_CMD_SET_XOFF_CHAR, stop_char);
2541                }
2542
2543                /* if we are implementing INBOUND XON/XOFF */
2544                if (I_IXOFF(tty)) {
2545                        rxFlow |= IOSP_RX_FLOW_XON_XOFF;
2546                        dev_dbg(dev, "%s - INBOUND XON/XOFF is enabled, XON = %2x, XOFF = %2x\n",
2547                                __func__, start_char, stop_char);
2548                } else {
2549                        dev_dbg(dev, "%s - INBOUND XON/XOFF is disabled\n", __func__);
2550                }
2551
2552                /* if we are implementing OUTBOUND XON/XOFF */
2553                if (I_IXON(tty)) {
2554                        txFlow |= IOSP_TX_FLOW_XON_XOFF;
2555                        dev_dbg(dev, "%s - OUTBOUND XON/XOFF is enabled, XON = %2x, XOFF = %2x\n",
2556                                __func__, start_char, stop_char);
2557                } else {
2558                        dev_dbg(dev, "%s - OUTBOUND XON/XOFF is disabled\n", __func__);
2559                }
2560        }
2561
2562        /* Set flow control to the configured value */
2563        if (!edge_serial->is_epic ||
2564            edge_serial->epic_descriptor.Supports.IOSPSetRxFlow)
2565                send_iosp_ext_cmd(edge_port, IOSP_CMD_SET_RX_FLOW, rxFlow);
2566        if (!edge_serial->is_epic ||
2567            edge_serial->epic_descriptor.Supports.IOSPSetTxFlow)
2568                send_iosp_ext_cmd(edge_port, IOSP_CMD_SET_TX_FLOW, txFlow);
2569
2570
2571        edge_port->shadowLCR &= ~(LCR_BITS_MASK | LCR_STOP_MASK | LCR_PAR_MASK);
2572        edge_port->shadowLCR |= (lData | lParity | lStop);
2573
2574        edge_port->validDataMask = mask;
2575
2576        /* Send the updated LCR value to the EdgePort */
2577        status = send_cmd_write_uart_register(edge_port, LCR,
2578                                                        edge_port->shadowLCR);
2579        if (status != 0)
2580                return;
2581
2582        /* set up the MCR register and send it to the EdgePort */
2583        edge_port->shadowMCR = MCR_MASTER_IE;
2584        if (cflag & CBAUD)
2585                edge_port->shadowMCR |= (MCR_DTR | MCR_RTS);
2586
2587        status = send_cmd_write_uart_register(edge_port, MCR,
2588                                                edge_port->shadowMCR);
2589        if (status != 0)
2590                return;
2591
2592        /* Determine divisor based on baud rate */
2593        baud = tty_get_baud_rate(tty);
2594        if (!baud) {
2595                /* pick a default, any default... */
2596                baud = 9600;
2597        }
2598
2599        dev_dbg(dev, "%s - baud rate = %d\n", __func__, baud);
2600        status = send_cmd_write_baud_rate(edge_port, baud);
2601        if (status == -1) {
2602                /* Speed change was not possible - put back the old speed */
2603                baud = tty_termios_baud_rate(old_termios);
2604                tty_encode_baud_rate(tty, baud, baud);
2605        }
2606}
2607
2608
2609/****************************************************************************
2610 * unicode_to_ascii
2611 *      Turns a string from Unicode into ASCII.
2612 *      Doesn't do a good job with any characters that are outside the normal
2613 *      ASCII range, but it's only for debugging...
2614 *      NOTE: expects the unicode in LE format
2615 ****************************************************************************/
2616static void unicode_to_ascii(char *string, int buflen,
2617                                        __le16 *unicode, int unicode_size)
2618{
2619        int i;
2620
2621        if (buflen <= 0)        /* never happens, but... */
2622                return;
2623        --buflen;               /* space for nul */
2624
2625        for (i = 0; i < unicode_size; i++) {
2626                if (i >= buflen)
2627                        break;
2628                string[i] = (char)(le16_to_cpu(unicode[i]));
2629        }
2630        string[i] = 0x00;
2631}
2632
2633
2634/****************************************************************************
2635 * get_manufacturing_desc
2636 *      reads in the manufacturing descriptor and stores it into the serial
2637 *      structure.
2638 ****************************************************************************/
2639static void get_manufacturing_desc(struct edgeport_serial *edge_serial)
2640{
2641        struct device *dev = &edge_serial->serial->dev->dev;
2642        int response;
2643
2644        dev_dbg(dev, "getting manufacturer descriptor\n");
2645
2646        response = rom_read(edge_serial->serial,
2647                                (EDGE_MANUF_DESC_ADDR & 0xffff0000) >> 16,
2648                                (__u16)(EDGE_MANUF_DESC_ADDR & 0x0000ffff),
2649                                EDGE_MANUF_DESC_LEN,
2650                                (__u8 *)(&edge_serial->manuf_descriptor));
2651
2652        if (response < 0) {
2653                dev_err(dev, "error in getting manufacturer descriptor: %d\n",
2654                                response);
2655        } else {
2656                char string[30];
2657                dev_dbg(dev, "**Manufacturer Descriptor\n");
2658                dev_dbg(dev, "  RomSize:        %dK\n",
2659                        edge_serial->manuf_descriptor.RomSize);
2660                dev_dbg(dev, "  RamSize:        %dK\n",
2661                        edge_serial->manuf_descriptor.RamSize);
2662                dev_dbg(dev, "  CpuRev:         %d\n",
2663                        edge_serial->manuf_descriptor.CpuRev);
2664                dev_dbg(dev, "  BoardRev:       %d\n",
2665                        edge_serial->manuf_descriptor.BoardRev);
2666                dev_dbg(dev, "  NumPorts:       %d\n",
2667                        edge_serial->manuf_descriptor.NumPorts);
2668                dev_dbg(dev, "  DescDate:       %d/%d/%d\n",
2669                        edge_serial->manuf_descriptor.DescDate[0],
2670                        edge_serial->manuf_descriptor.DescDate[1],
2671                        edge_serial->manuf_descriptor.DescDate[2]+1900);
2672                unicode_to_ascii(string, sizeof(string),
2673                        edge_serial->manuf_descriptor.SerialNumber,
2674                        edge_serial->manuf_descriptor.SerNumLength/2);
2675                dev_dbg(dev, "  SerialNumber: %s\n", string);
2676                unicode_to_ascii(string, sizeof(string),
2677                        edge_serial->manuf_descriptor.AssemblyNumber,
2678                        edge_serial->manuf_descriptor.AssemblyNumLength/2);
2679                dev_dbg(dev, "  AssemblyNumber: %s\n", string);
2680                unicode_to_ascii(string, sizeof(string),
2681                    edge_serial->manuf_descriptor.OemAssyNumber,
2682                    edge_serial->manuf_descriptor.OemAssyNumLength/2);
2683                dev_dbg(dev, "  OemAssyNumber:  %s\n", string);
2684                dev_dbg(dev, "  UartType:       %d\n",
2685                        edge_serial->manuf_descriptor.UartType);
2686                dev_dbg(dev, "  IonPid:         %d\n",
2687                        edge_serial->manuf_descriptor.IonPid);
2688                dev_dbg(dev, "  IonConfig:      %d\n",
2689                        edge_serial->manuf_descriptor.IonConfig);
2690        }
2691}
2692
2693
2694/****************************************************************************
2695 * get_boot_desc
2696 *      reads in the bootloader descriptor and stores it into the serial
2697 *      structure.
2698 ****************************************************************************/
2699static void get_boot_desc(struct edgeport_serial *edge_serial)
2700{
2701        struct device *dev = &edge_serial->serial->dev->dev;
2702        int response;
2703
2704        dev_dbg(dev, "getting boot descriptor\n");
2705
2706        response = rom_read(edge_serial->serial,
2707                                (EDGE_BOOT_DESC_ADDR & 0xffff0000) >> 16,
2708                                (__u16)(EDGE_BOOT_DESC_ADDR & 0x0000ffff),
2709                                EDGE_BOOT_DESC_LEN,
2710                                (__u8 *)(&edge_serial->boot_descriptor));
2711
2712        if (response < 0) {
2713                dev_err(dev, "error in getting boot descriptor: %d\n",
2714                                response);
2715        } else {
2716                dev_dbg(dev, "**Boot Descriptor:\n");
2717                dev_dbg(dev, "  BootCodeLength: %d\n",
2718                        le16_to_cpu(edge_serial->boot_descriptor.BootCodeLength));
2719                dev_dbg(dev, "  MajorVersion:   %d\n",
2720                        edge_serial->boot_descriptor.MajorVersion);
2721                dev_dbg(dev, "  MinorVersion:   %d\n",
2722                        edge_serial->boot_descriptor.MinorVersion);
2723                dev_dbg(dev, "  BuildNumber:    %d\n",
2724                        le16_to_cpu(edge_serial->boot_descriptor.BuildNumber));
2725                dev_dbg(dev, "  Capabilities:   0x%x\n",
2726                      le16_to_cpu(edge_serial->boot_descriptor.Capabilities));
2727                dev_dbg(dev, "  UConfig0:       %d\n",
2728                        edge_serial->boot_descriptor.UConfig0);
2729                dev_dbg(dev, "  UConfig1:       %d\n",
2730                        edge_serial->boot_descriptor.UConfig1);
2731        }
2732}
2733
2734
2735/****************************************************************************
2736 * load_application_firmware
2737 *      This is called to load the application firmware to the device
2738 ****************************************************************************/
2739static void load_application_firmware(struct edgeport_serial *edge_serial)
2740{
2741        struct device *dev = &edge_serial->serial->dev->dev;
2742        const struct ihex_binrec *rec;
2743        const struct firmware *fw;
2744        const char *fw_name;
2745        const char *fw_info;
2746        int response;
2747        __u32 Operaddr;
2748        __u16 build;
2749
2750        switch (edge_serial->product_info.iDownloadFile) {
2751                case EDGE_DOWNLOAD_FILE_I930:
2752                        fw_info = "downloading firmware version (930)";
2753                        fw_name = "edgeport/down.fw";
2754                        break;
2755
2756                case EDGE_DOWNLOAD_FILE_80251:
2757                        fw_info = "downloading firmware version (80251)";
2758                        fw_name = "edgeport/down2.fw";
2759                        break;
2760
2761                case EDGE_DOWNLOAD_FILE_NONE:
2762                        dev_dbg(dev, "No download file specified, skipping download\n");
2763                        return;
2764
2765                default:
2766                        return;
2767        }
2768
2769        response = request_ihex_firmware(&fw, fw_name,
2770                                    &edge_serial->serial->dev->dev);
2771        if (response) {
2772                dev_err(dev, "Failed to load image \"%s\" err %d\n",
2773                       fw_name, response);
2774                return;
2775        }
2776
2777        rec = (const struct ihex_binrec *)fw->data;
2778        build = (rec->data[2] << 8) | rec->data[3];
2779
2780        dev_dbg(dev, "%s %d.%d.%d\n", fw_info, rec->data[0], rec->data[1], build);
2781
2782        edge_serial->product_info.FirmwareMajorVersion = rec->data[0];
2783        edge_serial->product_info.FirmwareMinorVersion = rec->data[1];
2784        edge_serial->product_info.FirmwareBuildNumber = cpu_to_le16(build);
2785
2786        for (rec = ihex_next_binrec(rec); rec;
2787             rec = ihex_next_binrec(rec)) {
2788                Operaddr = be32_to_cpu(rec->addr);
2789                response = sram_write(edge_serial->serial,
2790                                     Operaddr >> 16,
2791                                     Operaddr & 0xFFFF,
2792                                     be16_to_cpu(rec->len),
2793                                     &rec->data[0]);
2794                if (response < 0) {
2795                        dev_err(&edge_serial->serial->dev->dev,
2796                                "sram_write failed (%x, %x, %d)\n",
2797                                Operaddr >> 16, Operaddr & 0xFFFF,
2798                                be16_to_cpu(rec->len));
2799                        break;
2800                }
2801        }
2802
2803        dev_dbg(dev, "sending exec_dl_code\n");
2804        response = usb_control_msg (edge_serial->serial->dev,
2805                                    usb_sndctrlpipe(edge_serial->serial->dev, 0),
2806                                    USB_REQUEST_ION_EXEC_DL_CODE,
2807                                    0x40, 0x4000, 0x0001, NULL, 0, 3000);
2808
2809        release_firmware(fw);
2810}
2811
2812
2813/****************************************************************************
2814 * edge_startup
2815 ****************************************************************************/
2816static int edge_startup(struct usb_serial *serial)
2817{
2818        struct edgeport_serial *edge_serial;
2819        struct usb_device *dev;
2820        struct device *ddev = &serial->dev->dev;
2821        int i;
2822        int response;
2823        bool interrupt_in_found;
2824        bool bulk_in_found;
2825        bool bulk_out_found;
2826        static const __u32 descriptor[3] = {    EDGE_COMPATIBILITY_MASK0,
2827                                                EDGE_COMPATIBILITY_MASK1,
2828                                                EDGE_COMPATIBILITY_MASK2 };
2829
2830        dev = serial->dev;
2831
2832        /* create our private serial structure */
2833        edge_serial = kzalloc(sizeof(struct edgeport_serial), GFP_KERNEL);
2834        if (!edge_serial)
2835                return -ENOMEM;
2836
2837        spin_lock_init(&edge_serial->es_lock);
2838        edge_serial->serial = serial;
2839        usb_set_serial_data(serial, edge_serial);
2840
2841        /* get the name for the device from the device */
2842        i = usb_string(dev, dev->descriptor.iManufacturer,
2843            &edge_serial->name[0], MAX_NAME_LEN+1);
2844        if (i < 0)
2845                i = 0;
2846        edge_serial->name[i++] = ' ';
2847        usb_string(dev, dev->descriptor.iProduct,
2848            &edge_serial->name[i], MAX_NAME_LEN+2 - i);
2849
2850        dev_info(&serial->dev->dev, "%s detected\n", edge_serial->name);
2851
2852        /* Read the epic descriptor */
2853        if (get_epic_descriptor(edge_serial) < 0) {
2854                /* memcpy descriptor to Supports structures */
2855                memcpy(&edge_serial->epic_descriptor.Supports, descriptor,
2856                       sizeof(struct edge_compatibility_bits));
2857
2858                /* get the manufacturing descriptor for this device */
2859                get_manufacturing_desc(edge_serial);
2860
2861                /* get the boot descriptor */
2862                get_boot_desc(edge_serial);
2863
2864                get_product_info(edge_serial);
2865        }
2866
2867        /* set the number of ports from the manufacturing description */
2868        /* serial->num_ports = serial->product_info.NumPorts; */
2869        if ((!edge_serial->is_epic) &&
2870            (edge_serial->product_info.NumPorts != serial->num_ports)) {
2871                dev_warn(ddev,
2872                        "Device Reported %d serial ports vs. core thinking we have %d ports, email greg@kroah.com this information.\n",
2873                         edge_serial->product_info.NumPorts,
2874                         serial->num_ports);
2875        }
2876
2877        dev_dbg(ddev, "%s - time 1 %ld\n", __func__, jiffies);
2878
2879        /* If not an EPiC device */
2880        if (!edge_serial->is_epic) {
2881                /* now load the application firmware into this device */
2882                load_application_firmware(edge_serial);
2883
2884                dev_dbg(ddev, "%s - time 2 %ld\n", __func__, jiffies);
2885
2886                /* Check current Edgeport EEPROM and update if necessary */
2887                update_edgeport_E2PROM(edge_serial);
2888
2889                dev_dbg(ddev, "%s - time 3 %ld\n", __func__, jiffies);
2890
2891                /* set the configuration to use #1 */
2892/*              dev_dbg(ddev, "set_configuration 1\n"); */
2893/*              usb_set_configuration (dev, 1); */
2894        }
2895        dev_dbg(ddev, "  FirmwareMajorVersion  %d.%d.%d\n",
2896            edge_serial->product_info.FirmwareMajorVersion,
2897            edge_serial->product_info.FirmwareMinorVersion,
2898            le16_to_cpu(edge_serial->product_info.FirmwareBuildNumber));
2899
2900        /* we set up the pointers to the endpoints in the edge_open function,
2901         * as the structures aren't created yet. */
2902
2903        response = 0;
2904
2905        if (edge_serial->is_epic) {
2906                struct usb_host_interface *alt;
2907
2908                alt = serial->interface->cur_altsetting;
2909
2910                /* EPIC thing, set up our interrupt polling now and our read
2911                 * urb, so that the device knows it really is connected. */
2912                interrupt_in_found = bulk_in_found = bulk_out_found = false;
2913                for (i = 0; i < alt->desc.bNumEndpoints; ++i) {
2914                        struct usb_endpoint_descriptor *endpoint;
2915                        int buffer_size;
2916
2917                        endpoint = &alt->endpoint[i].desc;
2918                        buffer_size = usb_endpoint_maxp(endpoint);
2919                        if (!interrupt_in_found &&
2920                            (usb_endpoint_is_int_in(endpoint))) {
2921                                /* we found a interrupt in endpoint */
2922                                dev_dbg(ddev, "found interrupt in\n");
2923
2924                                /* not set up yet, so do it now */
2925                                edge_serial->interrupt_read_urb =
2926                                                usb_alloc_urb(0, GFP_KERNEL);
2927                                if (!edge_serial->interrupt_read_urb) {
2928                                        response = -ENOMEM;
2929                                        break;
2930                                }
2931
2932                                edge_serial->interrupt_in_buffer =
2933                                        kmalloc(buffer_size, GFP_KERNEL);
2934                                if (!edge_serial->interrupt_in_buffer) {
2935                                        response = -ENOMEM;
2936                                        break;
2937                                }
2938                                edge_serial->interrupt_in_endpoint =
2939                                                endpoint->bEndpointAddress;
2940
2941                                /* set up our interrupt urb */
2942                                usb_fill_int_urb(
2943                                        edge_serial->interrupt_read_urb,
2944                                        dev,
2945                                        usb_rcvintpipe(dev,
2946                                                endpoint->bEndpointAddress),
2947                                        edge_serial->interrupt_in_buffer,
2948                                        buffer_size,
2949                                        edge_interrupt_callback,
2950                                        edge_serial,
2951                                        endpoint->bInterval);
2952
2953                                interrupt_in_found = true;
2954                        }
2955
2956                        if (!bulk_in_found &&
2957                                (usb_endpoint_is_bulk_in(endpoint))) {
2958                                /* we found a bulk in endpoint */
2959                                dev_dbg(ddev, "found bulk in\n");
2960
2961                                /* not set up yet, so do it now */
2962                                edge_serial->read_urb =
2963                                                usb_alloc_urb(0, GFP_KERNEL);
2964                                if (!edge_serial->read_urb) {
2965                                        response = -ENOMEM;
2966                                        break;
2967                                }
2968
2969                                edge_serial->bulk_in_buffer =
2970                                        kmalloc(buffer_size, GFP_KERNEL);
2971                                if (!edge_serial->bulk_in_buffer) {
2972                                        response = -ENOMEM;
2973                                        break;
2974                                }
2975                                edge_serial->bulk_in_endpoint =
2976                                                endpoint->bEndpointAddress;
2977
2978                                /* set up our bulk in urb */
2979                                usb_fill_bulk_urb(edge_serial->read_urb, dev,
2980                                        usb_rcvbulkpipe(dev,
2981                                                endpoint->bEndpointAddress),
2982                                        edge_serial->bulk_in_buffer,
2983                                        usb_endpoint_maxp(endpoint),
2984                                        edge_bulk_in_callback,
2985                                        edge_serial);
2986                                bulk_in_found = true;
2987                        }
2988
2989                        if (!bulk_out_found &&
2990                            (usb_endpoint_is_bulk_out(endpoint))) {
2991                                /* we found a bulk out endpoint */
2992                                dev_dbg(ddev, "found bulk out\n");
2993                                edge_serial->bulk_out_endpoint =
2994                                                endpoint->bEndpointAddress;
2995                                bulk_out_found = true;
2996                        }
2997                }
2998
2999                if (response || !interrupt_in_found || !bulk_in_found ||
3000                                                        !bulk_out_found) {
3001                        if (!response) {
3002                                dev_err(ddev, "expected endpoints not found\n");
3003                                response = -ENODEV;
3004                        }
3005
3006                        usb_free_urb(edge_serial->interrupt_read_urb);
3007                        kfree(edge_serial->interrupt_in_buffer);
3008
3009                        usb_free_urb(edge_serial->read_urb);
3010                        kfree(edge_serial->bulk_in_buffer);
3011
3012                        kfree(edge_serial);
3013
3014                        return response;
3015                }
3016
3017                /* start interrupt read for this edgeport this interrupt will
3018                 * continue as long as the edgeport is connected */
3019                response = usb_submit_urb(edge_serial->interrupt_read_urb,
3020                                                                GFP_KERNEL);
3021                if (response)
3022                        dev_err(ddev, "%s - Error %d submitting control urb\n",
3023                                __func__, response);
3024        }
3025        return response;
3026}
3027
3028
3029/****************************************************************************
3030 * edge_disconnect
3031 *      This function is called whenever the device is removed from the usb bus.
3032 ****************************************************************************/
3033static void edge_disconnect(struct usb_serial *serial)
3034{
3035        struct edgeport_serial *edge_serial = usb_get_serial_data(serial);
3036
3037        if (edge_serial->is_epic) {
3038                usb_kill_urb(edge_serial->interrupt_read_urb);
3039                usb_kill_urb(edge_serial->read_urb);
3040        }
3041}
3042
3043
3044/****************************************************************************
3045 * edge_release
3046 *      This function is called when the device structure is deallocated.
3047 ****************************************************************************/
3048static void edge_release(struct usb_serial *serial)
3049{
3050        struct edgeport_serial *edge_serial = usb_get_serial_data(serial);
3051
3052        if (edge_serial->is_epic) {
3053                usb_kill_urb(edge_serial->interrupt_read_urb);
3054                usb_free_urb(edge_serial->interrupt_read_urb);
3055                kfree(edge_serial->interrupt_in_buffer);
3056
3057                usb_kill_urb(edge_serial->read_urb);
3058                usb_free_urb(edge_serial->read_urb);
3059                kfree(edge_serial->bulk_in_buffer);
3060        }
3061
3062        kfree(edge_serial);
3063}
3064
3065static int edge_port_probe(struct usb_serial_port *port)
3066{
3067        struct edgeport_port *edge_port;
3068
3069        edge_port = kzalloc(sizeof(*edge_port), GFP_KERNEL);
3070        if (!edge_port)
3071                return -ENOMEM;
3072
3073        spin_lock_init(&edge_port->ep_lock);
3074        edge_port->port = port;
3075
3076        usb_set_serial_port_data(port, edge_port);
3077
3078        return 0;
3079}
3080
3081static int edge_port_remove(struct usb_serial_port *port)
3082{
3083        struct edgeport_port *edge_port;
3084
3085        edge_port = usb_get_serial_port_data(port);
3086        kfree(edge_port);
3087
3088        return 0;
3089}
3090
3091static struct usb_serial_driver edgeport_2port_device = {
3092        .driver = {
3093                .owner          = THIS_MODULE,
3094                .name           = "edgeport_2",
3095        },
3096        .description            = "Edgeport 2 port adapter",
3097        .id_table               = edgeport_2port_id_table,
3098        .num_ports              = 2,
3099        .num_bulk_in            = 1,
3100        .num_bulk_out           = 1,
3101        .num_interrupt_in       = 1,
3102        .open                   = edge_open,
3103        .close                  = edge_close,
3104        .throttle               = edge_throttle,
3105        .unthrottle             = edge_unthrottle,
3106        .attach                 = edge_startup,
3107        .disconnect             = edge_disconnect,
3108        .release                = edge_release,
3109        .port_probe             = edge_port_probe,
3110        .port_remove            = edge_port_remove,
3111        .ioctl                  = edge_ioctl,
3112        .set_termios            = edge_set_termios,
3113        .tiocmget               = edge_tiocmget,
3114        .tiocmset               = edge_tiocmset,
3115        .get_serial             = get_serial_info,
3116        .tiocmiwait             = usb_serial_generic_tiocmiwait,
3117        .get_icount             = usb_serial_generic_get_icount,
3118        .write                  = edge_write,
3119        .write_room             = edge_write_room,
3120        .chars_in_buffer        = edge_chars_in_buffer,
3121        .break_ctl              = edge_break,
3122        .read_int_callback      = edge_interrupt_callback,
3123        .read_bulk_callback     = edge_bulk_in_callback,
3124        .write_bulk_callback    = edge_bulk_out_data_callback,
3125};
3126
3127static struct usb_serial_driver edgeport_4port_device = {
3128        .driver = {
3129                .owner          = THIS_MODULE,
3130                .name           = "edgeport_4",
3131        },
3132        .description            = "Edgeport 4 port adapter",
3133        .id_table               = edgeport_4port_id_table,
3134        .num_ports              = 4,
3135        .num_bulk_in            = 1,
3136        .num_bulk_out           = 1,
3137        .num_interrupt_in       = 1,
3138        .open                   = edge_open,
3139        .close                  = edge_close,
3140        .throttle               = edge_throttle,
3141        .unthrottle             = edge_unthrottle,
3142        .attach                 = edge_startup,
3143        .disconnect             = edge_disconnect,
3144        .release                = edge_release,
3145        .port_probe             = edge_port_probe,
3146        .port_remove            = edge_port_remove,
3147        .ioctl                  = edge_ioctl,
3148        .set_termios            = edge_set_termios,
3149        .tiocmget               = edge_tiocmget,
3150        .tiocmset               = edge_tiocmset,
3151        .get_serial             = get_serial_info,
3152        .tiocmiwait             = usb_serial_generic_tiocmiwait,
3153        .get_icount             = usb_serial_generic_get_icount,
3154        .write                  = edge_write,
3155        .write_room             = edge_write_room,
3156        .chars_in_buffer        = edge_chars_in_buffer,
3157        .break_ctl              = edge_break,
3158        .read_int_callback      = edge_interrupt_callback,
3159        .read_bulk_callback     = edge_bulk_in_callback,
3160        .write_bulk_callback    = edge_bulk_out_data_callback,
3161};
3162
3163static struct usb_serial_driver edgeport_8port_device = {
3164        .driver = {
3165                .owner          = THIS_MODULE,
3166                .name           = "edgeport_8",
3167        },
3168        .description            = "Edgeport 8 port adapter",
3169        .id_table               = edgeport_8port_id_table,
3170        .num_ports              = 8,
3171        .num_bulk_in            = 1,
3172        .num_bulk_out           = 1,
3173        .num_interrupt_in       = 1,
3174        .open                   = edge_open,
3175        .close                  = edge_close,
3176        .throttle               = edge_throttle,
3177        .unthrottle             = edge_unthrottle,
3178        .attach                 = edge_startup,
3179        .disconnect             = edge_disconnect,
3180        .release                = edge_release,
3181        .port_probe             = edge_port_probe,
3182        .port_remove            = edge_port_remove,
3183        .ioctl                  = edge_ioctl,
3184        .set_termios            = edge_set_termios,
3185        .tiocmget               = edge_tiocmget,
3186        .tiocmset               = edge_tiocmset,
3187        .get_serial             = get_serial_info,
3188        .tiocmiwait             = usb_serial_generic_tiocmiwait,
3189        .get_icount             = usb_serial_generic_get_icount,
3190        .write                  = edge_write,
3191        .write_room             = edge_write_room,
3192        .chars_in_buffer        = edge_chars_in_buffer,
3193        .break_ctl              = edge_break,
3194        .read_int_callback      = edge_interrupt_callback,
3195        .read_bulk_callback     = edge_bulk_in_callback,
3196        .write_bulk_callback    = edge_bulk_out_data_callback,
3197};
3198
3199static struct usb_serial_driver epic_device = {
3200        .driver = {
3201                .owner          = THIS_MODULE,
3202                .name           = "epic",
3203        },
3204        .description            = "EPiC device",
3205        .id_table               = Epic_port_id_table,
3206        .num_ports              = 1,
3207        .num_bulk_in            = 1,
3208        .num_bulk_out           = 1,
3209        .num_interrupt_in       = 1,
3210        .open                   = edge_open,
3211        .close                  = edge_close,
3212        .throttle               = edge_throttle,
3213        .unthrottle             = edge_unthrottle,
3214        .attach                 = edge_startup,
3215        .disconnect             = edge_disconnect,
3216        .release                = edge_release,
3217        .port_probe             = edge_port_probe,
3218        .port_remove            = edge_port_remove,
3219        .ioctl                  = edge_ioctl,
3220        .set_termios            = edge_set_termios,
3221        .tiocmget               = edge_tiocmget,
3222        .tiocmset               = edge_tiocmset,
3223        .get_serial             = get_serial_info,
3224        .tiocmiwait             = usb_serial_generic_tiocmiwait,
3225        .get_icount             = usb_serial_generic_get_icount,
3226        .write                  = edge_write,
3227        .write_room             = edge_write_room,
3228        .chars_in_buffer        = edge_chars_in_buffer,
3229        .break_ctl              = edge_break,
3230        .read_int_callback      = edge_interrupt_callback,
3231        .read_bulk_callback     = edge_bulk_in_callback,
3232        .write_bulk_callback    = edge_bulk_out_data_callback,
3233};
3234
3235static struct usb_serial_driver * const serial_drivers[] = {
3236        &edgeport_2port_device, &edgeport_4port_device,
3237        &edgeport_8port_device, &epic_device, NULL
3238};
3239
3240module_usb_serial_driver(serial_drivers, id_table_combined);
3241
3242MODULE_AUTHOR(DRIVER_AUTHOR);
3243MODULE_DESCRIPTION(DRIVER_DESC);
3244MODULE_LICENSE("GPL");
3245MODULE_FIRMWARE("edgeport/boot.fw");
3246MODULE_FIRMWARE("edgeport/boot2.fw");
3247MODULE_FIRMWARE("edgeport/down.fw");
3248MODULE_FIRMWARE("edgeport/down2.fw");
3249