LXR linux/drivers/usb/serial/visor.c

   1// SPDX-License-Identifier: GPL-2.0
   2/*
   3 * USB HandSpring Visor, Palm m50x, and Sony Clie driver
   4 * (supports all of the Palm OS USB devices)
   5 *
   6 *      Copyright (C) 1999 - 2004
   7 *          Greg Kroah-Hartman (greg@kroah.com)
   8 *
   9 * See Documentation/usb/usb-serial.txt for more information on using this
  10 * driver
  11 *
  12 */
  13
  14#include <linux/kernel.h>
  15#include <linux/errno.h>
  16#include <linux/slab.h>
  17#include <linux/tty.h>
  18#include <linux/tty_driver.h>
  19#include <linux/tty_flip.h>
  20#include <linux/module.h>
  21#include <linux/moduleparam.h>
  22#include <linux/spinlock.h>
  23#include <linux/uaccess.h>
  24#include <linux/usb.h>
  25#include <linux/usb/serial.h>
  26#include <linux/usb/cdc.h>
  27#include "visor.h"
  28
  29/*
  30 * Version Information
  31 */
  32#define DRIVER_AUTHOR "Greg Kroah-Hartman <greg@kroah.com>"
  33#define DRIVER_DESC "USB HandSpring Visor / Palm OS driver"
  34
  35/* function prototypes for a handspring visor */
  36static int  visor_open(struct tty_struct *tty, struct usb_serial_port *port);
  37static void visor_close(struct usb_serial_port *port);
  38static int  visor_probe(struct usb_serial *serial,
  39                                        const struct usb_device_id *id);
  40static int  visor_calc_num_ports(struct usb_serial *serial,
  41                                        struct usb_serial_endpoints *epds);
  42static int  clie_5_calc_num_ports(struct usb_serial *serial,
  43                                        struct usb_serial_endpoints *epds);
  44static void visor_read_int_callback(struct urb *urb);
  45static int  clie_3_5_startup(struct usb_serial *serial);
  46static int palm_os_3_probe(struct usb_serial *serial,
  47                                        const struct usb_device_id *id);
  48static int palm_os_4_probe(struct usb_serial *serial,
  49                                        const struct usb_device_id *id);
  50
  51static const struct usb_device_id id_table[] = {
  52        { USB_DEVICE(HANDSPRING_VENDOR_ID, HANDSPRING_VISOR_ID),
  53                .driver_info = (kernel_ulong_t)&palm_os_3_probe },
  54        { USB_DEVICE(HANDSPRING_VENDOR_ID, HANDSPRING_TREO_ID),
  55                .driver_info = (kernel_ulong_t)&palm_os_4_probe },
  56        { USB_DEVICE(HANDSPRING_VENDOR_ID, HANDSPRING_TREO600_ID),
  57                .driver_info = (kernel_ulong_t)&palm_os_4_probe },
  58        { USB_DEVICE(GSPDA_VENDOR_ID, GSPDA_XPLORE_M68_ID),
  59                .driver_info = (kernel_ulong_t)&palm_os_4_probe },
  60        { USB_DEVICE(PALM_VENDOR_ID, PALM_M500_ID),
  61                .driver_info = (kernel_ulong_t)&palm_os_4_probe },
  62        { USB_DEVICE(PALM_VENDOR_ID, PALM_M505_ID),
  63                .driver_info = (kernel_ulong_t)&palm_os_4_probe },
  64        { USB_DEVICE(PALM_VENDOR_ID, PALM_M515_ID),
  65                .driver_info = (kernel_ulong_t)&palm_os_4_probe },
  66        { USB_DEVICE(PALM_VENDOR_ID, PALM_I705_ID),
  67                .driver_info = (kernel_ulong_t)&palm_os_4_probe },
  68        { USB_DEVICE(PALM_VENDOR_ID, PALM_M100_ID),
  69                .driver_info = (kernel_ulong_t)&palm_os_4_probe },
  70        { USB_DEVICE(PALM_VENDOR_ID, PALM_M125_ID),
  71                .driver_info = (kernel_ulong_t)&palm_os_4_probe },
  72        { USB_DEVICE(PALM_VENDOR_ID, PALM_M130_ID),
  73                .driver_info = (kernel_ulong_t)&palm_os_4_probe },
  74        { USB_DEVICE(PALM_VENDOR_ID, PALM_TUNGSTEN_T_ID),
  75                .driver_info = (kernel_ulong_t)&palm_os_4_probe },
  76        { USB_DEVICE(PALM_VENDOR_ID, PALM_TREO_650),
  77                .driver_info = (kernel_ulong_t)&palm_os_4_probe },
  78        { USB_DEVICE(PALM_VENDOR_ID, PALM_TUNGSTEN_Z_ID),
  79                .driver_info = (kernel_ulong_t)&palm_os_4_probe },
  80        { USB_DEVICE(PALM_VENDOR_ID, PALM_ZIRE_ID),
  81                .driver_info = (kernel_ulong_t)&palm_os_4_probe },
  82        { USB_DEVICE(SONY_VENDOR_ID, SONY_CLIE_4_0_ID),
  83                .driver_info = (kernel_ulong_t)&palm_os_4_probe },
  84        { USB_DEVICE(SONY_VENDOR_ID, SONY_CLIE_S360_ID),
  85                .driver_info = (kernel_ulong_t)&palm_os_4_probe },
  86        { USB_DEVICE(SONY_VENDOR_ID, SONY_CLIE_4_1_ID),
  87                .driver_info = (kernel_ulong_t)&palm_os_4_probe },
  88        { USB_DEVICE(SONY_VENDOR_ID, SONY_CLIE_NX60_ID),
  89                .driver_info = (kernel_ulong_t)&palm_os_4_probe },
  90        { USB_DEVICE(SONY_VENDOR_ID, SONY_CLIE_NZ90V_ID),
  91                .driver_info = (kernel_ulong_t)&palm_os_4_probe },
  92        { USB_DEVICE(SONY_VENDOR_ID, SONY_CLIE_TJ25_ID),
  93                .driver_info = (kernel_ulong_t)&palm_os_4_probe },
  94        { USB_DEVICE(ACER_VENDOR_ID, ACER_S10_ID),
  95                .driver_info = (kernel_ulong_t)&palm_os_4_probe },
  96        { USB_DEVICE_INTERFACE_CLASS(SAMSUNG_VENDOR_ID, SAMSUNG_SCH_I330_ID, 0xff),
  97                .driver_info = (kernel_ulong_t)&palm_os_4_probe },
  98        { USB_DEVICE(SAMSUNG_VENDOR_ID, SAMSUNG_SPH_I500_ID),
  99                .driver_info = (kernel_ulong_t)&palm_os_4_probe },
 100        { USB_DEVICE(TAPWAVE_VENDOR_ID, TAPWAVE_ZODIAC_ID),
 101                .driver_info = (kernel_ulong_t)&palm_os_4_probe },
 102        { USB_DEVICE(GARMIN_VENDOR_ID, GARMIN_IQUE_3600_ID),
 103                .driver_info = (kernel_ulong_t)&palm_os_4_probe },
 104        { USB_DEVICE(ACEECA_VENDOR_ID, ACEECA_MEZ1000_ID),
 105                .driver_info = (kernel_ulong_t)&palm_os_4_probe },
 106        { USB_DEVICE(KYOCERA_VENDOR_ID, KYOCERA_7135_ID),
 107                .driver_info = (kernel_ulong_t)&palm_os_4_probe },
 108        { USB_DEVICE(FOSSIL_VENDOR_ID, FOSSIL_ABACUS_ID),
 109                .driver_info = (kernel_ulong_t)&palm_os_4_probe },
 110        { }                                     /* Terminating entry */
 111};
 112
 113static const struct usb_device_id clie_id_5_table[] = {
 114        { USB_DEVICE(SONY_VENDOR_ID, SONY_CLIE_UX50_ID),
 115                .driver_info = (kernel_ulong_t)&palm_os_4_probe },
 116        { }                                     /* Terminating entry */
 117};
 118
 119static const struct usb_device_id clie_id_3_5_table[] = {
 120        { USB_DEVICE(SONY_VENDOR_ID, SONY_CLIE_3_5_ID) },
 121        { }                                     /* Terminating entry */
 122};
 123
 124static const struct usb_device_id id_table_combined[] = {
 125        { USB_DEVICE(HANDSPRING_VENDOR_ID, HANDSPRING_VISOR_ID) },
 126        { USB_DEVICE(HANDSPRING_VENDOR_ID, HANDSPRING_TREO_ID) },
 127        { USB_DEVICE(HANDSPRING_VENDOR_ID, HANDSPRING_TREO600_ID) },
 128        { USB_DEVICE(GSPDA_VENDOR_ID, GSPDA_XPLORE_M68_ID) },
 129        { USB_DEVICE(PALM_VENDOR_ID, PALM_M500_ID) },
 130        { USB_DEVICE(PALM_VENDOR_ID, PALM_M505_ID) },
 131        { USB_DEVICE(PALM_VENDOR_ID, PALM_M515_ID) },
 132        { USB_DEVICE(PALM_VENDOR_ID, PALM_I705_ID) },
 133        { USB_DEVICE(PALM_VENDOR_ID, PALM_M100_ID) },
 134        { USB_DEVICE(PALM_VENDOR_ID, PALM_M125_ID) },
 135        { USB_DEVICE(PALM_VENDOR_ID, PALM_M130_ID) },
 136        { USB_DEVICE(PALM_VENDOR_ID, PALM_TUNGSTEN_T_ID) },
 137        { USB_DEVICE(PALM_VENDOR_ID, PALM_TREO_650) },
 138        { USB_DEVICE(PALM_VENDOR_ID, PALM_TUNGSTEN_Z_ID) },
 139        { USB_DEVICE(PALM_VENDOR_ID, PALM_ZIRE_ID) },
 140        { USB_DEVICE(SONY_VENDOR_ID, SONY_CLIE_3_5_ID) },
 141        { USB_DEVICE(SONY_VENDOR_ID, SONY_CLIE_4_0_ID) },
 142        { USB_DEVICE(SONY_VENDOR_ID, SONY_CLIE_S360_ID) },
 143        { USB_DEVICE(SONY_VENDOR_ID, SONY_CLIE_4_1_ID) },
 144        { USB_DEVICE(SONY_VENDOR_ID, SONY_CLIE_NX60_ID) },
 145        { USB_DEVICE(SONY_VENDOR_ID, SONY_CLIE_NZ90V_ID) },
 146        { USB_DEVICE(SONY_VENDOR_ID, SONY_CLIE_UX50_ID) },
 147        { USB_DEVICE(SONY_VENDOR_ID, SONY_CLIE_TJ25_ID) },
 148        { USB_DEVICE(SAMSUNG_VENDOR_ID, SAMSUNG_SCH_I330_ID) },
 149        { USB_DEVICE(SAMSUNG_VENDOR_ID, SAMSUNG_SPH_I500_ID) },
 150        { USB_DEVICE(TAPWAVE_VENDOR_ID, TAPWAVE_ZODIAC_ID) },
 151        { USB_DEVICE(GARMIN_VENDOR_ID, GARMIN_IQUE_3600_ID) },
 152        { USB_DEVICE(ACEECA_VENDOR_ID, ACEECA_MEZ1000_ID) },
 153        { USB_DEVICE(KYOCERA_VENDOR_ID, KYOCERA_7135_ID) },
 154        { USB_DEVICE(FOSSIL_VENDOR_ID, FOSSIL_ABACUS_ID) },
 155        { }                                     /* Terminating entry */
 156};
 157
 158MODULE_DEVICE_TABLE(usb, id_table_combined);
 159
 160/* All of the device info needed for the Handspring Visor,
 161   and Palm 4.0 devices */
 162static struct usb_serial_driver handspring_device = {
 163        .driver = {
 164                .owner =        THIS_MODULE,
 165                .name =         "visor",
 166        },
 167        .description =          "Handspring Visor / Palm OS",
 168        .id_table =             id_table,
 169        .num_ports =            2,
 170        .bulk_out_size =        256,
 171        .open =                 visor_open,
 172        .close =                visor_close,
 173        .throttle =             usb_serial_generic_throttle,
 174        .unthrottle =           usb_serial_generic_unthrottle,
 175        .probe =                visor_probe,
 176        .calc_num_ports =       visor_calc_num_ports,
 177        .read_int_callback =    visor_read_int_callback,
 178};
 179
 180/* All of the device info needed for the Clie UX50, TH55 Palm 5.0 devices */
 181static struct usb_serial_driver clie_5_device = {
 182        .driver = {
 183                .owner =        THIS_MODULE,
 184                .name =         "clie_5",
 185        },
 186        .description =          "Sony Clie 5.0",
 187        .id_table =             clie_id_5_table,
 188        .num_ports =            2,
 189        .num_bulk_out =         2,
 190        .bulk_out_size =        256,
 191        .open =                 visor_open,
 192        .close =                visor_close,
 193        .throttle =             usb_serial_generic_throttle,
 194        .unthrottle =           usb_serial_generic_unthrottle,
 195        .probe =                visor_probe,
 196        .calc_num_ports =       clie_5_calc_num_ports,
 197        .read_int_callback =    visor_read_int_callback,
 198};
 199
 200/* device info for the Sony Clie OS version 3.5 */
 201static struct usb_serial_driver clie_3_5_device = {
 202        .driver = {
 203                .owner =        THIS_MODULE,
 204                .name =         "clie_3.5",
 205        },
 206        .description =          "Sony Clie 3.5",
 207        .id_table =             clie_id_3_5_table,
 208        .num_ports =            1,
 209        .bulk_out_size =        256,
 210        .open =                 visor_open,
 211        .close =                visor_close,
 212        .throttle =             usb_serial_generic_throttle,
 213        .unthrottle =           usb_serial_generic_unthrottle,
 214        .attach =               clie_3_5_startup,
 215};
 216
 217static struct usb_serial_driver * const serial_drivers[] = {
 218        &handspring_device, &clie_5_device, &clie_3_5_device, NULL
 219};
 220
 221/******************************************************************************
 222 * Handspring Visor specific driver functions
 223 ******************************************************************************/
 224static int visor_open(struct tty_struct *tty, struct usb_serial_port *port)
 225{
 226        int result = 0;
 227
 228        if (!port->read_urb) {
 229                /* this is needed for some brain dead Sony devices */
 230                dev_err(&port->dev, "Device lied about number of ports, please use a lower one.\n");
 231                return -ENODEV;
 232        }
 233
 234        /* Start reading from the device */
 235        result = usb_serial_generic_open(tty, port);
 236        if (result)
 237                goto exit;
 238
 239        if (port->interrupt_in_urb) {
 240                dev_dbg(&port->dev, "adding interrupt input for treo\n");
 241                result = usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL);
 242                if (result)
 243                        dev_err(&port->dev,
 244                            "%s - failed submitting interrupt urb, error %d\n",
 245                                                        __func__, result);
 246        }
 247exit:
 248        return result;
 249}
 250
 251
 252static void visor_close(struct usb_serial_port *port)
 253{
 254        unsigned char *transfer_buffer;
 255
 256        usb_serial_generic_close(port);
 257        usb_kill_urb(port->interrupt_in_urb);
 258
 259        transfer_buffer = kmalloc(0x12, GFP_KERNEL);
 260        if (!transfer_buffer)
 261                return;
 262        usb_control_msg(port->serial->dev,
 263                                         usb_rcvctrlpipe(port->serial->dev, 0),
 264                                         VISOR_CLOSE_NOTIFICATION, 0xc2,
 265                                         0x0000, 0x0000,
 266                                         transfer_buffer, 0x12, 300);
 267        kfree(transfer_buffer);
 268}
 269
 270static void visor_read_int_callback(struct urb *urb)
 271{
 272        struct usb_serial_port *port = urb->context;
 273        int status = urb->status;
 274        int result;
 275
 276        switch (status) {
 277        case 0:
 278                /* success */
 279                break;
 280        case -ECONNRESET:
 281        case -ENOENT:
 282        case -ESHUTDOWN:
 283                /* this urb is terminated, clean up */
 284                dev_dbg(&port->dev, "%s - urb shutting down with status: %d\n",
 285                        __func__, status);
 286                return;
 287        default:
 288                dev_dbg(&port->dev, "%s - nonzero urb status received: %d\n",
 289                        __func__, status);
 290                goto exit;
 291        }
 292
 293        /*
 294         * This information is still unknown what it can be used for.
 295         * If anyone has an idea, please let the author know...
 296         *
 297         * Rumor has it this endpoint is used to notify when data
 298         * is ready to be read from the bulk ones.
 299         */
 300        usb_serial_debug_data(&port->dev, __func__, urb->actual_length,
 301                              urb->transfer_buffer);
 302
 303exit:
 304        result = usb_submit_urb(urb, GFP_ATOMIC);
 305        if (result)
 306                dev_err(&urb->dev->dev,
 307                                "%s - Error %d submitting interrupt urb\n",
 308                                                        __func__, result);
 309}
 310
 311static int palm_os_3_probe(struct usb_serial *serial,
 312                                                const struct usb_device_id *id)
 313{
 314        struct device *dev = &serial->dev->dev;
 315        struct visor_connection_info *connection_info;
 316        unsigned char *transfer_buffer;
 317        char *string;
 318        int retval = 0;
 319        int i;
 320        int num_ports = 0;
 321
 322        transfer_buffer = kmalloc(sizeof(*connection_info), GFP_KERNEL);
 323        if (!transfer_buffer)
 324                return -ENOMEM;
 325
 326        /* send a get connection info request */
 327        retval = usb_control_msg(serial->dev,
 328                                  usb_rcvctrlpipe(serial->dev, 0),
 329                                  VISOR_GET_CONNECTION_INFORMATION,
 330                                  0xc2, 0x0000, 0x0000, transfer_buffer,
 331                                  sizeof(*connection_info), 300);
 332        if (retval < 0) {
 333                dev_err(dev, "%s - error %d getting connection information\n",
 334                        __func__, retval);
 335                goto exit;
 336        }
 337
 338        if (retval != sizeof(*connection_info)) {
 339                dev_err(dev, "Invalid connection information received from device\n");
 340                retval = -ENODEV;
 341                goto exit;
 342        }
 343
 344        connection_info = (struct visor_connection_info *)transfer_buffer;
 345
 346        num_ports = le16_to_cpu(connection_info->num_ports);
 347
 348        /* Handle devices that report invalid stuff here. */
 349        if (num_ports == 0 || num_ports > 2) {
 350                dev_warn(dev, "%s: No valid connect info available\n",
 351                        serial->type->description);
 352                num_ports = 2;
 353        }
 354
 355        for (i = 0; i < num_ports; ++i) {
 356                switch (connection_info->connections[i].port_function_id) {
 357                case VISOR_FUNCTION_GENERIC:
 358                        string = "Generic";
 359                        break;
 360                case VISOR_FUNCTION_DEBUGGER:
 361                        string = "Debugger";
 362                        break;
 363                case VISOR_FUNCTION_HOTSYNC:
 364                        string = "HotSync";
 365                        break;
 366                case VISOR_FUNCTION_CONSOLE:
 367                        string = "Console";
 368                        break;
 369                case VISOR_FUNCTION_REMOTE_FILE_SYS:
 370                        string = "Remote File System";
 371                        break;
 372                default:
 373                        string = "unknown";
 374                        break;
 375                }
 376                dev_info(dev, "%s: port %d, is for %s use\n",
 377                        serial->type->description,
 378                        connection_info->connections[i].port, string);
 379        }
 380        dev_info(dev, "%s: Number of ports: %d\n", serial->type->description,
 381                num_ports);
 382
 383        /*
 384         * save off our num_ports info so that we can use it in the
 385         * calc_num_ports callback
 386         */
 387        usb_set_serial_data(serial, (void *)(long)num_ports);
 388
 389        /* ask for the number of bytes available, but ignore the
 390           response as it is broken */
 391        retval = usb_control_msg(serial->dev,
 392                                  usb_rcvctrlpipe(serial->dev, 0),
 393                                  VISOR_REQUEST_BYTES_AVAILABLE,
 394                                  0xc2, 0x0000, 0x0005, transfer_buffer,
 395                                  0x02, 300);
 396        if (retval < 0)
 397                dev_err(dev, "%s - error %d getting bytes available request\n",
 398                        __func__, retval);
 399        retval = 0;
 400
 401exit:
 402        kfree(transfer_buffer);
 403
 404        return retval;
 405}
 406
 407static int palm_os_4_probe(struct usb_serial *serial,
 408                                                const struct usb_device_id *id)
 409{
 410        struct device *dev = &serial->dev->dev;
 411        struct palm_ext_connection_info *connection_info;
 412        unsigned char *transfer_buffer;
 413        int retval;
 414
 415        transfer_buffer =  kmalloc(sizeof(*connection_info), GFP_KERNEL);
 416        if (!transfer_buffer)
 417                return -ENOMEM;
 418
 419        retval = usb_control_msg(serial->dev,
 420                                  usb_rcvctrlpipe(serial->dev, 0),
 421                                  PALM_GET_EXT_CONNECTION_INFORMATION,
 422                                  0xc2, 0x0000, 0x0000, transfer_buffer,
 423                                  sizeof(*connection_info), 300);
 424        if (retval < 0)
 425                dev_err(dev, "%s - error %d getting connection info\n",
 426                        __func__, retval);
 427        else
 428                usb_serial_debug_data(dev, __func__, retval, transfer_buffer);
 429
 430        kfree(transfer_buffer);
 431        return 0;
 432}
 433
 434
 435static int visor_probe(struct usb_serial *serial,
 436                                        const struct usb_device_id *id)
 437{
 438        int retval = 0;
 439        int (*startup)(struct usb_serial *serial,
 440                                        const struct usb_device_id *id);
 441
 442        /*
 443         * some Samsung Android phones in modem mode have the same ID
 444         * as SPH-I500, but they are ACM devices, so dont bind to them
 445         */
 446        if (id->idVendor == SAMSUNG_VENDOR_ID &&
 447                id->idProduct == SAMSUNG_SPH_I500_ID &&
 448                serial->dev->descriptor.bDeviceClass == USB_CLASS_COMM &&
 449                serial->dev->descriptor.bDeviceSubClass ==
 450                        USB_CDC_SUBCLASS_ACM)
 451                return -ENODEV;
 452
 453        if (serial->dev->actconfig->desc.bConfigurationValue != 1) {
 454                dev_err(&serial->dev->dev, "active config #%d != 1 ??\n",
 455                        serial->dev->actconfig->desc.bConfigurationValue);
 456                return -ENODEV;
 457        }
 458
 459        if (id->driver_info) {
 460                startup = (void *)id->driver_info;
 461                retval = startup(serial, id);
 462        }
 463
 464        return retval;
 465}
 466
 467static int visor_calc_num_ports(struct usb_serial *serial,
 468                                        struct usb_serial_endpoints *epds)
 469{
 470        unsigned int vid = le16_to_cpu(serial->dev->descriptor.idVendor);
 471        int num_ports = (int)(long)(usb_get_serial_data(serial));
 472
 473        if (num_ports)
 474                usb_set_serial_data(serial, NULL);
 475
 476        /*
 477         * Only swap the bulk endpoints for the Handspring devices with
 478         * interrupt in endpoints, which for now are the Treo devices.
 479         */
 480        if (!(vid == HANDSPRING_VENDOR_ID || vid == KYOCERA_VENDOR_ID) ||
 481                        epds->num_interrupt_in == 0)
 482                goto out;
 483
 484        if (epds->num_bulk_in < 2 || epds->num_interrupt_in < 2) {
 485                dev_err(&serial->interface->dev, "missing endpoints\n");
 486                return -ENODEV;
 487        }
 488
 489        /*
 490         * It appears that Treos and Kyoceras want to use the
 491         * 1st bulk in endpoint to communicate with the 2nd bulk out endpoint,
 492         * so let's swap the 1st and 2nd bulk in and interrupt endpoints.
 493         * Note that swapping the bulk out endpoints would break lots of
 494         * apps that want to communicate on the second port.
 495         */
 496        swap(epds->bulk_in[0], epds->bulk_in[1]);
 497        swap(epds->interrupt_in[0], epds->interrupt_in[1]);
 498out:
 499        return num_ports;
 500}
 501
 502static int clie_5_calc_num_ports(struct usb_serial *serial,
 503                                        struct usb_serial_endpoints *epds)
 504{
 505        /*
 506         * TH55 registers 2 ports.
 507         * Communication in from the UX50/TH55 uses the first bulk-in
 508         * endpoint, while communication out to the UX50/TH55 uses the second
 509         * bulk-out endpoint.
 510         */
 511
 512        /*
 513         * FIXME: Should we swap the descriptors instead of using the same
 514         *        bulk-out endpoint for both ports?
 515         */
 516        epds->bulk_out[0] = epds->bulk_out[1];
 517
 518        return serial->type->num_ports;
 519}
 520
 521static int clie_3_5_startup(struct usb_serial *serial)
 522{
 523        struct device *dev = &serial->dev->dev;
 524        int result;
 525        u8 *data;
 526
 527        data = kmalloc(1, GFP_KERNEL);
 528        if (!data)
 529                return -ENOMEM;
 530
 531        /*
 532         * Note that PEG-300 series devices expect the following two calls.
 533         */
 534
 535        /* get the config number */
 536        result = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
 537                                  USB_REQ_GET_CONFIGURATION, USB_DIR_IN,
 538                                  0, 0, data, 1, 3000);
 539        if (result < 0) {
 540                dev_err(dev, "%s: get config number failed: %d\n",
 541                                                        __func__, result);
 542                goto out;
 543        }
 544        if (result != 1) {
 545                dev_err(dev, "%s: get config number bad return length: %d\n",
 546                                                        __func__, result);
 547                result = -EIO;
 548                goto out;
 549        }
 550
 551        /* get the interface number */
 552        result = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
 553                                  USB_REQ_GET_INTERFACE,
 554                                  USB_DIR_IN | USB_RECIP_INTERFACE,
 555                                  0, 0, data, 1, 3000);
 556        if (result < 0) {
 557                dev_err(dev, "%s: get interface number failed: %d\n",
 558                                                        __func__, result);
 559                goto out;
 560        }
 561        if (result != 1) {
 562                dev_err(dev,
 563                        "%s: get interface number bad return length: %d\n",
 564                                                        __func__, result);
 565                result = -EIO;
 566                goto out;
 567        }
 568
 569        result = 0;
 570out:
 571        kfree(data);
 572
 573        return result;
 574}
 575
 576module_usb_serial_driver(serial_drivers, id_table_combined);
 577
 578MODULE_AUTHOR(DRIVER_AUTHOR);
 579MODULE_DESCRIPTION(DRIVER_DESC);
 580MODULE_LICENSE("GPL v2");
 581