drivers/usb/serial/kobil_sct.c

   1 /*
   2  *  KOBIL USB Smart Card Terminal Driver
   3  *
   4  *  Copyright (C) 2002  KOBIL Systems GmbH
   5  *  Author: Thomas Wahrenbruch
   6  *
   7  *  Contact: linuxusb@kobil.de
   8  *
   9  *  This program is largely derived from work by the linux-usb group
  10  *  and associated source files.  Please see the usb/serial files for
  11  *  individual credits and copyrights.
  12  *
  13  *  This program is free software; you can redistribute it and/or modify
  14  *  it under the terms of the GNU General Public License as published by
  15  *  the Free Software Foundation; either version 2 of the License, or
  16  *  (at your option) any later version.
  17  *
  18  *  Thanks to Greg Kroah-Hartman (greg@kroah.com) for his help and
  19  *  patience.
  20  *
  21  * Supported readers: USB TWIN, KAAN Standard Plus and SecOVID Reader Plus
  22  * (Adapter K), B1 Professional and KAAN Professional (Adapter B)
  23  */
  24
  25
  26 #include <linux/kernel.h>
  27 #include <linux/errno.h>
  28 #include <linux/slab.h>
  29 #include <linux/tty.h>
  30 #include <linux/tty_driver.h>
  31 #include <linux/tty_flip.h>
  32 #include <linux/module.h>
  33 #include <linux/spinlock.h>
  34 #include <linux/uaccess.h>
  35 #include <linux/usb.h>
  36 #include <linux/usb/serial.h>
  37 #include <linux/ioctl.h>
  38 #include "kobil_sct.h"
  39
  40 #define DRIVER_AUTHOR "KOBIL Systems GmbH - http://www.kobil.com"
  41 #define DRIVER_DESC "KOBIL USB Smart Card Terminal Driver (experimental)"
  42
  43 #define KOBIL_VENDOR_ID                 0x0D46
  44 #define KOBIL_ADAPTER_B_PRODUCT_ID      0x2011
  45 #define KOBIL_ADAPTER_K_PRODUCT_ID      0x2012
  46 #define KOBIL_USBTWIN_PRODUCT_ID        0x0078
  47 #define KOBIL_KAAN_SIM_PRODUCT_ID       0x0081
  48
  49 #define KOBIL_TIMEOUT           500
  50 #define KOBIL_BUF_LENGTH        300
  51
  52
  53 /* Function prototypes */
  54 static int kobil_port_probe(struct usb_serial_port *probe);
  55 static int kobil_port_remove(struct usb_serial_port *probe);
  56 static int  kobil_open(struct tty_struct *tty, struct usb_serial_port *port);
  57 static void kobil_close(struct usb_serial_port *port);
  58 static int  kobil_write(struct tty_struct *tty, struct usb_serial_port *port,
  59                          const unsigned char *buf, int count);
  60 static int  kobil_write_room(struct tty_struct *tty);
  61 static int  kobil_ioctl(struct tty_struct *tty,
  62                         unsigned int cmd, unsigned long arg);
  63 static int  kobil_tiocmget(struct tty_struct *tty);
  64 static int  kobil_tiocmset(struct tty_struct *tty,
  65                            unsigned int set, unsigned int clear);
  66 static void kobil_read_int_callback(struct urb *urb);
  67 static void kobil_write_int_callback(struct urb *urb);
  68 static void kobil_set_termios(struct tty_struct *tty,
  69                         struct usb_serial_port *port, struct ktermios *old);
  70 static void kobil_init_termios(struct tty_struct *tty);
  71
  72 static const struct usb_device_id id_table[] = {
  73         { USB_DEVICE(KOBIL_VENDOR_ID, KOBIL_ADAPTER_B_PRODUCT_ID) },
  74         { USB_DEVICE(KOBIL_VENDOR_ID, KOBIL_ADAPTER_K_PRODUCT_ID) },
  75         { USB_DEVICE(KOBIL_VENDOR_ID, KOBIL_USBTWIN_PRODUCT_ID) },
  76         { USB_DEVICE(KOBIL_VENDOR_ID, KOBIL_KAAN_SIM_PRODUCT_ID) },
  77         { }                     /* Terminating entry */
  78 };
  79 MODULE_DEVICE_TABLE(usb, id_table);
  80
  81 static struct usb_serial_driver kobil_device = {
  82         .driver = {
  83                 .owner =        THIS_MODULE,
  84                 .name =         "kobil",
  85         },
  86         .description =          "KOBIL USB smart card terminal",
  87         .id_table =             id_table,
  88         .num_ports =            1,
  89         .num_interrupt_out =    1,
  90         .port_probe =           kobil_port_probe,
  91         .port_remove =          kobil_port_remove,
  92         .ioctl =                kobil_ioctl,
  93         .set_termios =          kobil_set_termios,
  94         .init_termios =         kobil_init_termios,
  95         .tiocmget =             kobil_tiocmget,
  96         .tiocmset =             kobil_tiocmset,
  97         .open =                 kobil_open,
  98         .close =                kobil_close,
  99         .write =                kobil_write,
 100         .write_room =           kobil_write_room,
 101         .read_int_callback =    kobil_read_int_callback,
 102         .write_int_callback =   kobil_write_int_callback,
 103 };
 104
 105 static struct usb_serial_driver * const serial_drivers[] = {
 106         &kobil_device, NULL
 107 };
 108
 109 struct kobil_private {
 110         unsigned char buf[KOBIL_BUF_LENGTH]; /* buffer for the APDU to send */
 111         int filled;  /* index of the last char in buf */
 112         int cur_pos; /* index of the next char to send in buf */
 113         __u16 device_type;
 114 };
 115
 116
 117 static int kobil_port_probe(struct usb_serial_port *port)
 118 {
 119         struct usb_serial *serial = port->serial;
 120         struct kobil_private *priv;
 121
 122         priv = kmalloc(sizeof(struct kobil_private), GFP_KERNEL);
 123         if (!priv)
 124                 return -ENOMEM;
 125
 126         priv->filled = 0;
 127         priv->cur_pos = 0;
 128         priv->device_type = le16_to_cpu(serial->dev->descriptor.idProduct);
 129
 130         switch (priv->device_type) {
 131         case KOBIL_ADAPTER_B_PRODUCT_ID:
 132                 dev_dbg(&serial->dev->dev, "KOBIL B1 PRO / KAAN PRO detected\n");
 133                 break;
 134         case KOBIL_ADAPTER_K_PRODUCT_ID:
 135                 dev_dbg(&serial->dev->dev, "KOBIL KAAN Standard Plus / SecOVID Reader Plus detected\n");
 136                 break;
 137         case KOBIL_USBTWIN_PRODUCT_ID:
 138                 dev_dbg(&serial->dev->dev, "KOBIL USBTWIN detected\n");
 139                 break;
 140         case KOBIL_KAAN_SIM_PRODUCT_ID:
 141                 dev_dbg(&serial->dev->dev, "KOBIL KAAN SIM detected\n");
 142                 break;
 143         }
 144         usb_set_serial_port_data(port, priv);
 145
 146         return 0;
 147 }
 148
 149
 150 static int kobil_port_remove(struct usb_serial_port *port)
 151 {
 152         struct kobil_private *priv;
 153
 154         priv = usb_get_serial_port_data(port);
 155         kfree(priv);
 156
 157         return 0;
 158 }
 159
 160 static void kobil_init_termios(struct tty_struct *tty)
 161 {
 162         /* Default to echo off and other sane device settings */
 163         tty->termios.c_lflag = 0;
 164         tty->termios.c_iflag &= ~(ISIG | ICANON | ECHO | IEXTEN | XCASE);
 165         tty->termios.c_iflag |= IGNBRK | IGNPAR | IXOFF;
 166         /* do NOT translate CR to CR-NL (0x0A -> 0x0A 0x0D) */
 167         tty->termios.c_oflag &= ~ONLCR;
 168 }
 169
 170 static int kobil_open(struct tty_struct *tty, struct usb_serial_port *port)
 171 {
 172         struct device *dev = &port->dev;
 173         int result = 0;
 174         struct kobil_private *priv;
 175         unsigned char *transfer_buffer;
 176         int transfer_buffer_length = 8;
 177
 178         priv = usb_get_serial_port_data(port);
 179
 180         /* allocate memory for transfer buffer */
 181         transfer_buffer = kzalloc(transfer_buffer_length, GFP_KERNEL);
 182         if (!transfer_buffer)
 183                 return -ENOMEM;
 184
 185         /* get hardware version */
 186         result = usb_control_msg(port->serial->dev,
 187                           usb_rcvctrlpipe(port->serial->dev, 0),
 188                           SUSBCRequest_GetMisc,
 189                           USB_TYPE_VENDOR | USB_RECIP_ENDPOINT | USB_DIR_IN,
 190                           SUSBCR_MSC_GetHWVersion,
 191                           0,
 192                           transfer_buffer,
 193                           transfer_buffer_length,
 194                           KOBIL_TIMEOUT
 195         );
 196         dev_dbg(dev, "%s - Send get_HW_version URB returns: %i\n", __func__, result);
 197         dev_dbg(dev, "Hardware version: %i.%i.%i\n", transfer_buffer[0],
 198                 transfer_buffer[1], transfer_buffer[2]);
 199
 200         /* get firmware version */
 201         result = usb_control_msg(port->serial->dev,
 202                           usb_rcvctrlpipe(port->serial->dev, 0),
 203                           SUSBCRequest_GetMisc,
 204                           USB_TYPE_VENDOR | USB_RECIP_ENDPOINT | USB_DIR_IN,
 205                           SUSBCR_MSC_GetFWVersion,
 206                           0,
 207                           transfer_buffer,
 208                           transfer_buffer_length,
 209                           KOBIL_TIMEOUT
 210         );
 211         dev_dbg(dev, "%s - Send get_FW_version URB returns: %i\n", __func__, result);
 212         dev_dbg(dev, "Firmware version: %i.%i.%i\n", transfer_buffer[0],
 213                 transfer_buffer[1], transfer_buffer[2]);
 214
 215         if (priv->device_type == KOBIL_ADAPTER_B_PRODUCT_ID ||
 216                         priv->device_type == KOBIL_ADAPTER_K_PRODUCT_ID) {
 217                 /* Setting Baudrate, Parity and Stopbits */
 218                 result = usb_control_msg(port->serial->dev,
 219                           usb_sndctrlpipe(port->serial->dev, 0),
 220                           SUSBCRequest_SetBaudRateParityAndStopBits,
 221                           USB_TYPE_VENDOR | USB_RECIP_ENDPOINT | USB_DIR_OUT,
 222                           SUSBCR_SBR_9600 | SUSBCR_SPASB_EvenParity |
 223                                                         SUSBCR_SPASB_1StopBit,
 224                           0,
 225                           NULL,
 226                           0,
 227                           KOBIL_TIMEOUT
 228                 );
 229                 dev_dbg(dev, "%s - Send set_baudrate URB returns: %i\n", __func__, result);
 230
 231                 /* reset all queues */
 232                 result = usb_control_msg(port->serial->dev,
 233                           usb_sndctrlpipe(port->serial->dev, 0),
 234                           SUSBCRequest_Misc,
 235                           USB_TYPE_VENDOR | USB_RECIP_ENDPOINT | USB_DIR_OUT,
 236                           SUSBCR_MSC_ResetAllQueues,
 237                           0,
 238                           NULL,
 239                           0,
 240                           KOBIL_TIMEOUT
 241                 );
 242                 dev_dbg(dev, "%s - Send reset_all_queues URB returns: %i\n", __func__, result);
 243         }
 244         if (priv->device_type == KOBIL_USBTWIN_PRODUCT_ID ||
 245             priv->device_type == KOBIL_ADAPTER_B_PRODUCT_ID ||
 246             priv->device_type == KOBIL_KAAN_SIM_PRODUCT_ID) {
 247                 /* start reading (Adapter B 'cause PNP string) */
 248                 result = usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL);
 249                 dev_dbg(dev, "%s - Send read URB returns: %i\n", __func__, result);
 250         }
 251
 252         kfree(transfer_buffer);
 253         return 0;
 254 }
 255
 256
 257 static void kobil_close(struct usb_serial_port *port)
 258 {
 259         /* FIXME: Add rts/dtr methods */
 260         usb_kill_urb(port->interrupt_out_urb);
 261         usb_kill_urb(port->interrupt_in_urb);
 262 }
 263
 264
 265 static void kobil_read_int_callback(struct urb *urb)
 266 {
 267         int result;
 268         struct usb_serial_port *port = urb->context;
 269         unsigned char *data = urb->transfer_buffer;
 270         int status = urb->status;
 271
 272         if (status) {
 273                 dev_dbg(&port->dev, "%s - Read int status not zero: %d\n", __func__, status);
 274                 return;
 275         }
 276
 277         if (urb->actual_length) {
 278                 usb_serial_debug_data(&port->dev, __func__, urb->actual_length,
 279                                                                         data);
 280                 tty_insert_flip_string(&port->port, data, urb->actual_length);
 281                 tty_flip_buffer_push(&port->port);
 282         }
 283
 284         result = usb_submit_urb(port->interrupt_in_urb, GFP_ATOMIC);
 285         dev_dbg(&port->dev, "%s - Send read URB returns: %i\n", __func__, result);
 286 }
 287
 288
 289 static void kobil_write_int_callback(struct urb *urb)
 290 {
 291 }
 292
 293
 294 static int kobil_write(struct tty_struct *tty, struct usb_serial_port *port,
 295                         const unsigned char *buf, int count)
 296 {
 297         int length = 0;
 298         int result = 0;
 299         int todo = 0;
 300         struct kobil_private *priv;
 301
 302         if (count == 0) {
 303                 dev_dbg(&port->dev, "%s - write request of 0 bytes\n", __func__);
 304                 return 0;
 305         }
 306
 307         priv = usb_get_serial_port_data(port);
 308
 309         if (count > (KOBIL_BUF_LENGTH - priv->filled)) {
 310                 dev_dbg(&port->dev, "%s - Error: write request bigger than buffer size\n", __func__);
 311                 return -ENOMEM;
 312         }
 313
 314         /* Copy data to buffer */
 315         memcpy(priv->buf + priv->filled, buf, count);
 316         usb_serial_debug_data(&port->dev, __func__, count, priv->buf + priv->filled);
 317         priv->filled = priv->filled + count;
 318
 319         /* only send complete block. TWIN, KAAN SIM and adapter K
 320            use the same protocol. */
 321         if (((priv->device_type != KOBIL_ADAPTER_B_PRODUCT_ID) && (priv->filled > 2) && (priv->filled >= (priv->buf[1] + 3))) ||
 322              ((priv->device_type == KOBIL_ADAPTER_B_PRODUCT_ID) && (priv->filled > 3) && (priv->filled >= (priv->buf[2] + 4)))) {
 323                 /* stop reading (except TWIN and KAAN SIM) */
 324                 if ((priv->device_type == KOBIL_ADAPTER_B_PRODUCT_ID)
 325                         || (priv->device_type == KOBIL_ADAPTER_K_PRODUCT_ID))
 326                         usb_kill_urb(port->interrupt_in_urb);
 327
 328                 todo = priv->filled - priv->cur_pos;
 329
 330                 while (todo > 0) {
 331                         /* max 8 byte in one urb (endpoint size) */
 332                         length = min(todo, port->interrupt_out_size);
 333                         /* copy data to transfer buffer */
 334                         memcpy(port->interrupt_out_buffer,
 335                                         priv->buf + priv->cur_pos, length);
 336                         port->interrupt_out_urb->transfer_buffer_length = length;
 337
 338                         priv->cur_pos = priv->cur_pos + length;
 339                         result = usb_submit_urb(port->interrupt_out_urb,
 340                                         GFP_ATOMIC);
 341                         dev_dbg(&port->dev, "%s - Send write URB returns: %i\n", __func__, result);
 342                         todo = priv->filled - priv->cur_pos;
 343
 344                         if (todo > 0)
 345                                 msleep(24);
 346                 }
 347
 348                 priv->filled = 0;
 349                 priv->cur_pos = 0;
 350
 351                 /* start reading (except TWIN and KAAN SIM) */
 352                 if (priv->device_type == KOBIL_ADAPTER_B_PRODUCT_ID ||
 353                         priv->device_type == KOBIL_ADAPTER_K_PRODUCT_ID) {
 354                         result = usb_submit_urb(port->interrupt_in_urb,
 355                                         GFP_ATOMIC);
 356                         dev_dbg(&port->dev, "%s - Send read URB returns: %i\n", __func__, result);
 357                 }
 358         }
 359         return count;
 360 }
 361
 362
 363 static int kobil_write_room(struct tty_struct *tty)
 364 {
 365         /* FIXME */
 366         return 8;
 367 }
 368
 369
 370 static int kobil_tiocmget(struct tty_struct *tty)
 371 {
 372         struct usb_serial_port *port = tty->driver_data;
 373         struct kobil_private *priv;
 374         int result;
 375         unsigned char *transfer_buffer;
 376         int transfer_buffer_length = 8;
 377
 378         priv = usb_get_serial_port_data(port);
 379         if (priv->device_type == KOBIL_USBTWIN_PRODUCT_ID
 380                         || priv->device_type == KOBIL_KAAN_SIM_PRODUCT_ID) {
 381                 /* This device doesn't support ioctl calls */
 382                 return -EINVAL;
 383         }
 384
 385         /* allocate memory for transfer buffer */
 386         transfer_buffer = kzalloc(transfer_buffer_length, GFP_KERNEL);
 387         if (!transfer_buffer)
 388                 return -ENOMEM;
 389
 390         result = usb_control_msg(port->serial->dev,
 391                           usb_rcvctrlpipe(port->serial->dev, 0),
 392                           SUSBCRequest_GetStatusLineState,
 393                           USB_TYPE_VENDOR | USB_RECIP_ENDPOINT | USB_DIR_IN,
 394                           0,
 395                           0,
 396                           transfer_buffer,
 397                           transfer_buffer_length,
 398                           KOBIL_TIMEOUT);
 399
 400         dev_dbg(&port->dev, "Send get_status_line_state URB returns: %i\n",
 401                         result);
 402         if (result < 1) {
 403                 if (result >= 0)
 404                         result = -EIO;
 405                 goto out_free;
 406         }
 407
 408         dev_dbg(&port->dev, "Statusline: %02x\n", transfer_buffer[0]);
 409
 410         result = 0;
 411         if ((transfer_buffer[0] & SUSBCR_GSL_DSR) != 0)
 412                 result = TIOCM_DSR;
 413 out_free:
 414         kfree(transfer_buffer);
 415         return result;
 416 }
 417
 418 static int kobil_tiocmset(struct tty_struct *tty,
 419                            unsigned int set, unsigned int clear)
 420 {
 421         struct usb_serial_port *port = tty->driver_data;
 422         struct device *dev = &port->dev;
 423         struct kobil_private *priv;
 424         int result;
 425         int dtr = 0;
 426         int rts = 0;
 427
 428         /* FIXME: locking ? */
 429         priv = usb_get_serial_port_data(port);
 430         if (priv->device_type == KOBIL_USBTWIN_PRODUCT_ID
 431                 || priv->device_type == KOBIL_KAAN_SIM_PRODUCT_ID) {
 432                 /* This device doesn't support ioctl calls */
 433                 return -EINVAL;
 434         }
 435
 436         if (set & TIOCM_RTS)
 437                 rts = 1;
 438         if (set & TIOCM_DTR)
 439                 dtr = 1;
 440         if (clear & TIOCM_RTS)
 441                 rts = 0;
 442         if (clear & TIOCM_DTR)
 443                 dtr = 0;
 444
 445         if (priv->device_type == KOBIL_ADAPTER_B_PRODUCT_ID) {
 446                 if (dtr != 0)
 447                         dev_dbg(dev, "%s - Setting DTR\n", __func__);
 448                 else
 449                         dev_dbg(dev, "%s - Clearing DTR\n", __func__);
 450                 result = usb_control_msg(port->serial->dev,
 451                           usb_sndctrlpipe(port->serial->dev, 0),
 452                           SUSBCRequest_SetStatusLinesOrQueues,
 453                           USB_TYPE_VENDOR | USB_RECIP_ENDPOINT | USB_DIR_OUT,
 454                           ((dtr != 0) ? SUSBCR_SSL_SETDTR : SUSBCR_SSL_CLRDTR),
 455                           0,
 456                           NULL,
 457                           0,
 458                           KOBIL_TIMEOUT);
 459         } else {
 460                 if (rts != 0)
 461                         dev_dbg(dev, "%s - Setting RTS\n", __func__);
 462                 else
 463                         dev_dbg(dev, "%s - Clearing RTS\n", __func__);
 464                 result = usb_control_msg(port->serial->dev,
 465                         usb_sndctrlpipe(port->serial->dev, 0),
 466                         SUSBCRequest_SetStatusLinesOrQueues,
 467                         USB_TYPE_VENDOR | USB_RECIP_ENDPOINT | USB_DIR_OUT,
 468                         ((rts != 0) ? SUSBCR_SSL_SETRTS : SUSBCR_SSL_CLRRTS),
 469                         0,
 470                         NULL,
 471                         0,
 472                         KOBIL_TIMEOUT);
 473         }
 474         dev_dbg(dev, "%s - Send set_status_line URB returns: %i\n", __func__, result);
 475         return (result < 0) ? result : 0;
 476 }
 477
 478 static void kobil_set_termios(struct tty_struct *tty,
 479                         struct usb_serial_port *port, struct ktermios *old)
 480 {
 481         struct kobil_private *priv;
 482         int result;
 483         unsigned short urb_val = 0;
 484         int c_cflag = tty->termios.c_cflag;
 485         speed_t speed;
 486
 487         priv = usb_get_serial_port_data(port);
 488         if (priv->device_type == KOBIL_USBTWIN_PRODUCT_ID ||
 489                         priv->device_type == KOBIL_KAAN_SIM_PRODUCT_ID) {
 490                 /* This device doesn't support ioctl calls */
 491                 tty_termios_copy_hw(&tty->termios, old);
 492                 return;
 493         }
 494
 495         speed = tty_get_baud_rate(tty);
 496         switch (speed) {
 497         case 1200:
 498                 urb_val = SUSBCR_SBR_1200;
 499                 break;
 500         default:
 501                 speed = 9600;
 502         case 9600:
 503                 urb_val = SUSBCR_SBR_9600;
 504                 break;
 505         }
 506         urb_val |= (c_cflag & CSTOPB) ? SUSBCR_SPASB_2StopBits :
 507                                                         SUSBCR_SPASB_1StopBit;
 508         if (c_cflag & PARENB) {
 509                 if  (c_cflag & PARODD)
 510                         urb_val |= SUSBCR_SPASB_OddParity;
 511                 else
 512                         urb_val |= SUSBCR_SPASB_EvenParity;
 513         } else
 514                 urb_val |= SUSBCR_SPASB_NoParity;
 515         tty->termios.c_cflag &= ~CMSPAR;
 516         tty_encode_baud_rate(tty, speed, speed);
 517
 518         result = usb_control_msg(port->serial->dev,
 519                   usb_sndctrlpipe(port->serial->dev, 0),
 520                   SUSBCRequest_SetBaudRateParityAndStopBits,
 521                   USB_TYPE_VENDOR | USB_RECIP_ENDPOINT | USB_DIR_OUT,
 522                   urb_val,
 523                   0,
 524                   NULL,
 525                   0,
 526                   KOBIL_TIMEOUT
 527                 );
 528 }
 529
 530 static int kobil_ioctl(struct tty_struct *tty,
 531                                         unsigned int cmd, unsigned long arg)
 532 {
 533         struct usb_serial_port *port = tty->driver_data;
 534         struct kobil_private *priv = usb_get_serial_port_data(port);
 535         int result;
 536
 537         if (priv->device_type == KOBIL_USBTWIN_PRODUCT_ID ||
 538                         priv->device_type == KOBIL_KAAN_SIM_PRODUCT_ID)
 539                 /* This device doesn't support ioctl calls */
 540                 return -ENOIOCTLCMD;
 541
 542         switch (cmd) {
 543         case TCFLSH:
 544                 result = usb_control_msg(port->serial->dev,
 545                           usb_sndctrlpipe(port->serial->dev, 0),
 546                           SUSBCRequest_Misc,
 547                           USB_TYPE_VENDOR | USB_RECIP_ENDPOINT | USB_DIR_OUT,
 548                           SUSBCR_MSC_ResetAllQueues,
 549                           0,
 550                           NULL,
 551                           0,
 552                           KOBIL_TIMEOUT
 553                         );
 554
 555                 dev_dbg(&port->dev,
 556                         "%s - Send reset_all_queues (FLUSH) URB returns: %i\n",
 557                         __func__, result);
 558                 return (result < 0) ? -EIO: 0;
 559         default:
 560                 return -ENOIOCTLCMD;
 561         }
 562 }
 563
 564 module_usb_serial_driver(serial_drivers, id_table);
 565
 566 MODULE_AUTHOR(DRIVER_AUTHOR);
 567 MODULE_DESCRIPTION(DRIVER_DESC);
 568 MODULE_LICENSE("GPL");