drivers/usb/serial/spcp8x5.c

   1 /*
   2  * spcp8x5 USB to serial adaptor driver
   3  *
   4  * Copyright (C) 2010 Johan Hovold (jhovold@gmail.com)
   5  * Copyright (C) 2006 Linxb (xubin.lin@worldplus.com.cn)
   6  * Copyright (C) 2006 S1 Corp.
   7  *
   8  * Original driver for 2.6.10 pl2303 driver by
   9  *   Greg Kroah-Hartman (greg@kroah.com)
  10  * Changes for 2.6.20 by Harald Klein <hari@vt100.at>
  11  *
  12  *      This program is free software; you can redistribute it and/or modify
  13  *      it under the terms of the GNU General Public License as published by
  14  *      the Free Software Foundation; either version 2 of the License, or
  15  *      (at your option) any later version.
  16  *
  17  *
  18  */
  19 #include <linux/kernel.h>
  20 #include <linux/errno.h>
  21 #include <linux/init.h>
  22 #include <linux/slab.h>
  23 #include <linux/tty.h>
  24 #include <linux/tty_driver.h>
  25 #include <linux/tty_flip.h>
  26 #include <linux/module.h>
  27 #include <linux/spinlock.h>
  28 #include <linux/usb.h>
  29 #include <linux/usb/serial.h>
  30
  31
  32 /* Version Information */
  33 #define DRIVER_VERSION  "v0.10"
  34 #define DRIVER_DESC     "SPCP8x5 USB to serial adaptor driver"
  35
  36 static bool debug;
  37
  38 #define SPCP8x5_007_VID         0x04FC
  39 #define SPCP8x5_007_PID         0x0201
  40 #define SPCP8x5_008_VID         0x04fc
  41 #define SPCP8x5_008_PID         0x0235
  42 #define SPCP8x5_PHILIPS_VID     0x0471
  43 #define SPCP8x5_PHILIPS_PID     0x081e
  44 #define SPCP8x5_INTERMATIC_VID  0x04FC
  45 #define SPCP8x5_INTERMATIC_PID  0x0204
  46 #define SPCP8x5_835_VID         0x04fc
  47 #define SPCP8x5_835_PID         0x0231
  48
  49 static const struct usb_device_id id_table[] = {
  50         { USB_DEVICE(SPCP8x5_PHILIPS_VID , SPCP8x5_PHILIPS_PID)},
  51         { USB_DEVICE(SPCP8x5_INTERMATIC_VID, SPCP8x5_INTERMATIC_PID)},
  52         { USB_DEVICE(SPCP8x5_835_VID, SPCP8x5_835_PID)},
  53         { USB_DEVICE(SPCP8x5_008_VID, SPCP8x5_008_PID)},
  54         { USB_DEVICE(SPCP8x5_007_VID, SPCP8x5_007_PID)},
  55         { }                                     /* Terminating entry */
  56 };
  57 MODULE_DEVICE_TABLE(usb, id_table);
  58
  59 struct spcp8x5_usb_ctrl_arg {
  60         u8      type;
  61         u8      cmd;
  62         u8      cmd_type;
  63         u16     value;
  64         u16     index;
  65         u16     length;
  66 };
  67
  68
  69 /* spcp8x5 spec register define */
  70 #define MCR_CONTROL_LINE_RTS            0x02
  71 #define MCR_CONTROL_LINE_DTR            0x01
  72 #define MCR_DTR                         0x01
  73 #define MCR_RTS                         0x02
  74
  75 #define MSR_STATUS_LINE_DCD             0x80
  76 #define MSR_STATUS_LINE_RI              0x40
  77 #define MSR_STATUS_LINE_DSR             0x20
  78 #define MSR_STATUS_LINE_CTS             0x10
  79
  80 /* verdor command here , we should define myself */
  81 #define SET_DEFAULT                     0x40
  82 #define SET_DEFAULT_TYPE                0x20
  83
  84 #define SET_UART_FORMAT                 0x40
  85 #define SET_UART_FORMAT_TYPE            0x21
  86 #define SET_UART_FORMAT_SIZE_5          0x00
  87 #define SET_UART_FORMAT_SIZE_6          0x01
  88 #define SET_UART_FORMAT_SIZE_7          0x02
  89 #define SET_UART_FORMAT_SIZE_8          0x03
  90 #define SET_UART_FORMAT_STOP_1          0x00
  91 #define SET_UART_FORMAT_STOP_2          0x04
  92 #define SET_UART_FORMAT_PAR_NONE        0x00
  93 #define SET_UART_FORMAT_PAR_ODD         0x10
  94 #define SET_UART_FORMAT_PAR_EVEN        0x30
  95 #define SET_UART_FORMAT_PAR_MASK        0xD0
  96 #define SET_UART_FORMAT_PAR_SPACE       0x90
  97
  98 #define GET_UART_STATUS_TYPE            0xc0
  99 #define GET_UART_STATUS                 0x22
 100 #define GET_UART_STATUS_MSR             0x06
 101
 102 #define SET_UART_STATUS                 0x40
 103 #define SET_UART_STATUS_TYPE            0x23
 104 #define SET_UART_STATUS_MCR             0x0004
 105 #define SET_UART_STATUS_MCR_DTR         0x01
 106 #define SET_UART_STATUS_MCR_RTS         0x02
 107 #define SET_UART_STATUS_MCR_LOOP        0x10
 108
 109 #define SET_WORKING_MODE                0x40
 110 #define SET_WORKING_MODE_TYPE           0x24
 111 #define SET_WORKING_MODE_U2C            0x00
 112 #define SET_WORKING_MODE_RS485          0x01
 113 #define SET_WORKING_MODE_PDMA           0x02
 114 #define SET_WORKING_MODE_SPP            0x03
 115
 116 #define SET_FLOWCTL_CHAR                0x40
 117 #define SET_FLOWCTL_CHAR_TYPE           0x25
 118
 119 #define GET_VERSION                     0xc0
 120 #define GET_VERSION_TYPE                0x26
 121
 122 #define SET_REGISTER                    0x40
 123 #define SET_REGISTER_TYPE               0x27
 124
 125 #define GET_REGISTER                    0xc0
 126 #define GET_REGISTER_TYPE               0x28
 127
 128 #define SET_RAM                         0x40
 129 #define SET_RAM_TYPE                    0x31
 130
 131 #define GET_RAM                         0xc0
 132 #define GET_RAM_TYPE                    0x32
 133
 134 /* how come ??? */
 135 #define UART_STATE                      0x08
 136 #define UART_STATE_TRANSIENT_MASK       0x75
 137 #define UART_DCD                        0x01
 138 #define UART_DSR                        0x02
 139 #define UART_BREAK_ERROR                0x04
 140 #define UART_RING                       0x08
 141 #define UART_FRAME_ERROR                0x10
 142 #define UART_PARITY_ERROR               0x20
 143 #define UART_OVERRUN_ERROR              0x40
 144 #define UART_CTS                        0x80
 145
 146 enum spcp8x5_type {
 147         SPCP825_007_TYPE,
 148         SPCP825_008_TYPE,
 149         SPCP825_PHILIP_TYPE,
 150         SPCP825_INTERMATIC_TYPE,
 151         SPCP835_TYPE,
 152 };
 153
 154 static struct usb_driver spcp8x5_driver = {
 155         .name =                 "spcp8x5",
 156         .disconnect =           usb_serial_disconnect,
 157         .id_table =             id_table,
 158 };
 159
 160
 161 struct spcp8x5_private {
 162         spinlock_t      lock;
 163         enum spcp8x5_type       type;
 164         wait_queue_head_t       delta_msr_wait;
 165         u8                      line_control;
 166         u8                      line_status;
 167 };
 168
 169 /* desc : when device plug in,this function would be called.
 170  * thanks to usb_serial subsystem,then do almost every things for us. And what
 171  * we should do just alloc the buffer */
 172 static int spcp8x5_startup(struct usb_serial *serial)
 173 {
 174         struct spcp8x5_private *priv;
 175         int i;
 176         enum spcp8x5_type type = SPCP825_007_TYPE;
 177         u16 product = le16_to_cpu(serial->dev->descriptor.idProduct);
 178
 179         if (product == 0x0201)
 180                 type = SPCP825_007_TYPE;
 181         else if (product == 0x0231)
 182                 type = SPCP835_TYPE;
 183         else if (product == 0x0235)
 184                 type = SPCP825_008_TYPE;
 185         else if (product == 0x0204)
 186                 type = SPCP825_INTERMATIC_TYPE;
 187         else if (product == 0x0471 &&
 188                  serial->dev->descriptor.idVendor == cpu_to_le16(0x081e))
 189                 type = SPCP825_PHILIP_TYPE;
 190         dev_dbg(&serial->dev->dev, "device type = %d\n", (int)type);
 191
 192         for (i = 0; i < serial->num_ports; ++i) {
 193                 priv = kzalloc(sizeof(struct spcp8x5_private), GFP_KERNEL);
 194                 if (!priv)
 195                         goto cleanup;
 196
 197                 spin_lock_init(&priv->lock);
 198                 init_waitqueue_head(&priv->delta_msr_wait);
 199                 priv->type = type;
 200                 usb_set_serial_port_data(serial->port[i] , priv);
 201         }
 202
 203         return 0;
 204 cleanup:
 205         for (--i; i >= 0; --i) {
 206                 priv = usb_get_serial_port_data(serial->port[i]);
 207                 kfree(priv);
 208                 usb_set_serial_port_data(serial->port[i] , NULL);
 209         }
 210         return -ENOMEM;
 211 }
 212
 213 /* call when the device plug out. free all the memory alloced by probe */
 214 static void spcp8x5_release(struct usb_serial *serial)
 215 {
 216         int i;
 217
 218         for (i = 0; i < serial->num_ports; i++)
 219                 kfree(usb_get_serial_port_data(serial->port[i]));
 220 }
 221
 222 /* set the modem control line of the device.
 223  * NOTE spcp825-007 not supported this */
 224 static int spcp8x5_set_ctrlLine(struct usb_device *dev, u8 value,
 225                                 enum spcp8x5_type type)
 226 {
 227         int retval;
 228         u8 mcr = 0 ;
 229
 230         if (type == SPCP825_007_TYPE)
 231                 return -EPERM;
 232
 233         mcr = (unsigned short)value;
 234         retval = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
 235                                  SET_UART_STATUS_TYPE, SET_UART_STATUS,
 236                                  mcr, 0x04, NULL, 0, 100);
 237         if (retval != 0)
 238                 dev_dbg(&dev->dev, "usb_control_msg return %#x\n", retval);
 239         return retval;
 240 }
 241
 242 /* get the modem status register of the device
 243  * NOTE spcp825-007 not supported this */
 244 static int spcp8x5_get_msr(struct usb_device *dev, u8 *status,
 245                            enum spcp8x5_type type)
 246 {
 247         u8 *status_buffer;
 248         int ret;
 249
 250         /* I return Permited not support here but seem inval device
 251          * is more fix */
 252         if (type == SPCP825_007_TYPE)
 253                 return -EPERM;
 254         if (status == NULL)
 255                 return -EINVAL;
 256
 257         status_buffer = kmalloc(1, GFP_KERNEL);
 258         if (!status_buffer)
 259                 return -ENOMEM;
 260         status_buffer[0] = status[0];
 261
 262         ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
 263                               GET_UART_STATUS, GET_UART_STATUS_TYPE,
 264                               0, GET_UART_STATUS_MSR, status_buffer, 1, 100);
 265         if (ret < 0)
 266                 dev_dbg(&dev->dev, "Get MSR = 0x%p failed (error = %d)",
 267                         status_buffer, ret);
 268
 269         dev_dbg(&dev->dev, "0xc0:0x22:0:6  %d - 0x%p ", ret, status_buffer);
 270         status[0] = status_buffer[0];
 271         kfree(status_buffer);
 272
 273         return ret;
 274 }
 275
 276 /* select the work mode.
 277  * NOTE this function not supported by spcp825-007 */
 278 static void spcp8x5_set_workMode(struct usb_device *dev, u16 value,
 279                                  u16 index, enum spcp8x5_type type)
 280 {
 281         int ret;
 282
 283         /* I return Permited not support here but seem inval device
 284          * is more fix */
 285         if (type == SPCP825_007_TYPE)
 286                 return;
 287
 288         ret = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
 289                               SET_WORKING_MODE_TYPE, SET_WORKING_MODE,
 290                               value, index, NULL, 0, 100);
 291         dev_dbg(&dev->dev, "value = %#x , index = %#x\n", value, index);
 292         if (ret < 0)
 293                 dev_dbg(&dev->dev,
 294                         "RTSCTS usb_control_msg(enable flowctrl) = %d\n", ret);
 295 }
 296
 297 static int spcp8x5_carrier_raised(struct usb_serial_port *port)
 298 {
 299         struct spcp8x5_private *priv = usb_get_serial_port_data(port);
 300         if (priv->line_status & MSR_STATUS_LINE_DCD)
 301                 return 1;
 302         return 0;
 303 }
 304
 305 static void spcp8x5_dtr_rts(struct usb_serial_port *port, int on)
 306 {
 307         struct spcp8x5_private *priv = usb_get_serial_port_data(port);
 308         unsigned long flags;
 309         u8 control;
 310
 311         spin_lock_irqsave(&priv->lock, flags);
 312         if (on)
 313                 priv->line_control = MCR_CONTROL_LINE_DTR
 314                                                 | MCR_CONTROL_LINE_RTS;
 315         else
 316                 priv->line_control &= ~ (MCR_CONTROL_LINE_DTR
 317                                                 | MCR_CONTROL_LINE_RTS);
 318         control = priv->line_control;
 319         spin_unlock_irqrestore(&priv->lock, flags);
 320         spcp8x5_set_ctrlLine(port->serial->dev, control , priv->type);
 321 }
 322
 323 static void spcp8x5_init_termios(struct tty_struct *tty)
 324 {
 325         /* for the 1st time call this function */
 326         *(tty->termios) = tty_std_termios;
 327         tty->termios->c_cflag = B115200 | CS8 | CREAD | HUPCL | CLOCAL;
 328         tty->termios->c_ispeed = 115200;
 329         tty->termios->c_ospeed = 115200;
 330 }
 331
 332 /* set the serial param for transfer. we should check if we really need to
 333  * transfer. if we set flow control we should do this too. */
 334 static void spcp8x5_set_termios(struct tty_struct *tty,
 335                 struct usb_serial_port *port, struct ktermios *old_termios)
 336 {
 337         struct usb_serial *serial = port->serial;
 338         struct spcp8x5_private *priv = usb_get_serial_port_data(port);
 339         unsigned long flags;
 340         unsigned int cflag = tty->termios->c_cflag;
 341         unsigned int old_cflag = old_termios->c_cflag;
 342         unsigned short uartdata;
 343         unsigned char buf[2] = {0, 0};
 344         int baud;
 345         int i;
 346         u8 control;
 347
 348
 349         /* check that they really want us to change something */
 350         if (!tty_termios_hw_change(tty->termios, old_termios))
 351                 return;
 352
 353         /* set DTR/RTS active */
 354         spin_lock_irqsave(&priv->lock, flags);
 355         control = priv->line_control;
 356         if ((old_cflag & CBAUD) == B0) {
 357                 priv->line_control |= MCR_DTR;
 358                 if (!(old_cflag & CRTSCTS))
 359                         priv->line_control |= MCR_RTS;
 360         }
 361         if (control != priv->line_control) {
 362                 control = priv->line_control;
 363                 spin_unlock_irqrestore(&priv->lock, flags);
 364                 spcp8x5_set_ctrlLine(serial->dev, control , priv->type);
 365         } else {
 366                 spin_unlock_irqrestore(&priv->lock, flags);
 367         }
 368
 369         /* Set Baud Rate */
 370         baud = tty_get_baud_rate(tty);
 371         switch (baud) {
 372         case 300:       buf[0] = 0x00;  break;
 373         case 600:       buf[0] = 0x01;  break;
 374         case 1200:      buf[0] = 0x02;  break;
 375         case 2400:      buf[0] = 0x03;  break;
 376         case 4800:      buf[0] = 0x04;  break;
 377         case 9600:      buf[0] = 0x05;  break;
 378         case 19200:     buf[0] = 0x07;  break;
 379         case 38400:     buf[0] = 0x09;  break;
 380         case 57600:     buf[0] = 0x0a;  break;
 381         case 115200:    buf[0] = 0x0b;  break;
 382         case 230400:    buf[0] = 0x0c;  break;
 383         case 460800:    buf[0] = 0x0d;  break;
 384         case 921600:    buf[0] = 0x0e;  break;
 385 /*      case 1200000:   buf[0] = 0x0f;  break; */
 386 /*      case 2400000:   buf[0] = 0x10;  break; */
 387         case 3000000:   buf[0] = 0x11;  break;
 388 /*      case 6000000:   buf[0] = 0x12;  break; */
 389         case 0:
 390         case 1000000:
 391                         buf[0] = 0x0b;  break;
 392         default:
 393                 dev_err(&port->dev, "spcp825 driver does not support the "
 394                         "baudrate requested, using default of 9600.\n");
 395         }
 396
 397         /* Set Data Length : 00:5bit, 01:6bit, 10:7bit, 11:8bit */
 398         if (cflag & CSIZE) {
 399                 switch (cflag & CSIZE) {
 400                 case CS5:
 401                         buf[1] |= SET_UART_FORMAT_SIZE_5;
 402                         break;
 403                 case CS6:
 404                         buf[1] |= SET_UART_FORMAT_SIZE_6;
 405                         break;
 406                 case CS7:
 407                         buf[1] |= SET_UART_FORMAT_SIZE_7;
 408                         break;
 409                 default:
 410                 case CS8:
 411                         buf[1] |= SET_UART_FORMAT_SIZE_8;
 412                         break;
 413                 }
 414         }
 415
 416         /* Set Stop bit2 : 0:1bit 1:2bit */
 417         buf[1] |= (cflag & CSTOPB) ? SET_UART_FORMAT_STOP_2 :
 418                                      SET_UART_FORMAT_STOP_1;
 419
 420         /* Set Parity bit3-4 01:Odd 11:Even */
 421         if (cflag & PARENB) {
 422                 buf[1] |= (cflag & PARODD) ?
 423                 SET_UART_FORMAT_PAR_ODD : SET_UART_FORMAT_PAR_EVEN ;
 424         } else
 425                 buf[1] |= SET_UART_FORMAT_PAR_NONE;
 426
 427         uartdata = buf[0] | buf[1]<<8;
 428
 429         i = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
 430                             SET_UART_FORMAT_TYPE, SET_UART_FORMAT,
 431                             uartdata, 0, NULL, 0, 100);
 432         if (i < 0)
 433                 dev_err(&port->dev, "Set UART format %#x failed (error = %d)\n",
 434                         uartdata, i);
 435         dbg("0x21:0x40:0:0  %d", i);
 436
 437         if (cflag & CRTSCTS) {
 438                 /* enable hardware flow control */
 439                 spcp8x5_set_workMode(serial->dev, 0x000a,
 440                                      SET_WORKING_MODE_U2C, priv->type);
 441         }
 442 }
 443
 444 /* open the serial port. do some usb system call. set termios and get the line
 445  * status of the device. */
 446 static int spcp8x5_open(struct tty_struct *tty, struct usb_serial_port *port)
 447 {
 448         struct ktermios tmp_termios;
 449         struct usb_serial *serial = port->serial;
 450         struct spcp8x5_private *priv = usb_get_serial_port_data(port);
 451         int ret;
 452         unsigned long flags;
 453         u8 status = 0x30;
 454         /* status 0x30 means DSR and CTS = 1 other CDC RI and delta = 0 */
 455
 456         usb_clear_halt(serial->dev, port->write_urb->pipe);
 457         usb_clear_halt(serial->dev, port->read_urb->pipe);
 458
 459         ret = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
 460                               0x09, 0x00,
 461                               0x01, 0x00, NULL, 0x00, 100);
 462         if (ret)
 463                 return ret;
 464
 465         spcp8x5_set_ctrlLine(serial->dev, priv->line_control , priv->type);
 466
 467         /* Setup termios */
 468         if (tty)
 469                 spcp8x5_set_termios(tty, port, &tmp_termios);
 470
 471         spcp8x5_get_msr(serial->dev, &status, priv->type);
 472
 473         /* may be we should update uart status here but now we did not do */
 474         spin_lock_irqsave(&priv->lock, flags);
 475         priv->line_status = status & 0xf0 ;
 476         spin_unlock_irqrestore(&priv->lock, flags);
 477
 478         port->port.drain_delay = 256;
 479
 480         return usb_serial_generic_open(tty, port);
 481 }
 482
 483 static void spcp8x5_process_read_urb(struct urb *urb)
 484 {
 485         struct usb_serial_port *port = urb->context;
 486         struct spcp8x5_private *priv = usb_get_serial_port_data(port);
 487         struct tty_struct *tty;
 488         unsigned char *data = urb->transfer_buffer;
 489         unsigned long flags;
 490         u8 status;
 491         char tty_flag;
 492
 493         /* get tty_flag from status */
 494         tty_flag = TTY_NORMAL;
 495
 496         spin_lock_irqsave(&priv->lock, flags);
 497         status = priv->line_status;
 498         priv->line_status &= ~UART_STATE_TRANSIENT_MASK;
 499         spin_unlock_irqrestore(&priv->lock, flags);
 500         /* wake up the wait for termios */
 501         wake_up_interruptible(&priv->delta_msr_wait);
 502
 503         if (!urb->actual_length)
 504                 return;
 505
 506         tty = tty_port_tty_get(&port->port);
 507         if (!tty)
 508                 return;
 509
 510         if (status & UART_STATE_TRANSIENT_MASK) {
 511                 /* break takes precedence over parity, which takes precedence
 512                  * over framing errors */
 513                 if (status & UART_BREAK_ERROR)
 514                         tty_flag = TTY_BREAK;
 515                 else if (status & UART_PARITY_ERROR)
 516                         tty_flag = TTY_PARITY;
 517                 else if (status & UART_FRAME_ERROR)
 518                         tty_flag = TTY_FRAME;
 519                 dev_dbg(&port->dev, "tty_flag = %d\n", tty_flag);
 520
 521                 /* overrun is special, not associated with a char */
 522                 if (status & UART_OVERRUN_ERROR)
 523                         tty_insert_flip_char(tty, 0, TTY_OVERRUN);
 524
 525                 if (status & UART_DCD)
 526                         usb_serial_handle_dcd_change(port, tty,
 527                                    priv->line_status & MSR_STATUS_LINE_DCD);
 528         }
 529
 530         tty_insert_flip_string_fixed_flag(tty, data, tty_flag,
 531                                                         urb->actual_length);
 532         tty_flip_buffer_push(tty);
 533         tty_kref_put(tty);
 534 }
 535
 536 static int spcp8x5_wait_modem_info(struct usb_serial_port *port,
 537                                    unsigned int arg)
 538 {
 539         struct spcp8x5_private *priv = usb_get_serial_port_data(port);
 540         unsigned long flags;
 541         unsigned int prevstatus;
 542         unsigned int status;
 543         unsigned int changed;
 544
 545         spin_lock_irqsave(&priv->lock, flags);
 546         prevstatus = priv->line_status;
 547         spin_unlock_irqrestore(&priv->lock, flags);
 548
 549         while (1) {
 550                 /* wake up in bulk read */
 551                 interruptible_sleep_on(&priv->delta_msr_wait);
 552
 553                 /* see if a signal did it */
 554                 if (signal_pending(current))
 555                         return -ERESTARTSYS;
 556
 557                 spin_lock_irqsave(&priv->lock, flags);
 558                 status = priv->line_status;
 559                 spin_unlock_irqrestore(&priv->lock, flags);
 560
 561                 changed = prevstatus^status;
 562
 563                 if (((arg & TIOCM_RNG) && (changed & MSR_STATUS_LINE_RI)) ||
 564                     ((arg & TIOCM_DSR) && (changed & MSR_STATUS_LINE_DSR)) ||
 565                     ((arg & TIOCM_CD)  && (changed & MSR_STATUS_LINE_DCD)) ||
 566                     ((arg & TIOCM_CTS) && (changed & MSR_STATUS_LINE_CTS)))
 567                         return 0;
 568
 569                 prevstatus = status;
 570         }
 571         /* NOTREACHED */
 572         return 0;
 573 }
 574
 575 static int spcp8x5_ioctl(struct tty_struct *tty,
 576                          unsigned int cmd, unsigned long arg)
 577 {
 578         struct usb_serial_port *port = tty->driver_data;
 579         dbg("%s (%d) cmd = 0x%04x", __func__, port->number, cmd);
 580
 581         switch (cmd) {
 582         case TIOCMIWAIT:
 583                 dbg("%s (%d) TIOCMIWAIT", __func__,  port->number);
 584                 return spcp8x5_wait_modem_info(port, arg);
 585
 586         default:
 587                 dbg("%s not supported = 0x%04x", __func__, cmd);
 588                 break;
 589         }
 590
 591         return -ENOIOCTLCMD;
 592 }
 593
 594 static int spcp8x5_tiocmset(struct tty_struct *tty,
 595                             unsigned int set, unsigned int clear)
 596 {
 597         struct usb_serial_port *port = tty->driver_data;
 598         struct spcp8x5_private *priv = usb_get_serial_port_data(port);
 599         unsigned long flags;
 600         u8 control;
 601
 602         spin_lock_irqsave(&priv->lock, flags);
 603         if (set & TIOCM_RTS)
 604                 priv->line_control |= MCR_RTS;
 605         if (set & TIOCM_DTR)
 606                 priv->line_control |= MCR_DTR;
 607         if (clear & TIOCM_RTS)
 608                 priv->line_control &= ~MCR_RTS;
 609         if (clear & TIOCM_DTR)
 610                 priv->line_control &= ~MCR_DTR;
 611         control = priv->line_control;
 612         spin_unlock_irqrestore(&priv->lock, flags);
 613
 614         return spcp8x5_set_ctrlLine(port->serial->dev, control , priv->type);
 615 }
 616
 617 static int spcp8x5_tiocmget(struct tty_struct *tty)
 618 {
 619         struct usb_serial_port *port = tty->driver_data;
 620         struct spcp8x5_private *priv = usb_get_serial_port_data(port);
 621         unsigned long flags;
 622         unsigned int mcr;
 623         unsigned int status;
 624         unsigned int result;
 625
 626         spin_lock_irqsave(&priv->lock, flags);
 627         mcr = priv->line_control;
 628         status = priv->line_status;
 629         spin_unlock_irqrestore(&priv->lock, flags);
 630
 631         result = ((mcr & MCR_DTR)                       ? TIOCM_DTR : 0)
 632                   | ((mcr & MCR_RTS)                    ? TIOCM_RTS : 0)
 633                   | ((status & MSR_STATUS_LINE_CTS)     ? TIOCM_CTS : 0)
 634                   | ((status & MSR_STATUS_LINE_DSR)     ? TIOCM_DSR : 0)
 635                   | ((status & MSR_STATUS_LINE_RI)      ? TIOCM_RI  : 0)
 636                   | ((status & MSR_STATUS_LINE_DCD)     ? TIOCM_CD  : 0);
 637
 638         return result;
 639 }
 640
 641 /* All of the device info needed for the spcp8x5 SIO serial converter */
 642 static struct usb_serial_driver spcp8x5_device = {
 643         .driver = {
 644                 .owner =        THIS_MODULE,
 645                 .name =         "SPCP8x5",
 646         },
 647         .id_table               = id_table,
 648         .num_ports              = 1,
 649         .open                   = spcp8x5_open,
 650         .dtr_rts                = spcp8x5_dtr_rts,
 651         .carrier_raised         = spcp8x5_carrier_raised,
 652         .set_termios            = spcp8x5_set_termios,
 653         .init_termios           = spcp8x5_init_termios,
 654         .ioctl                  = spcp8x5_ioctl,
 655         .tiocmget               = spcp8x5_tiocmget,
 656         .tiocmset               = spcp8x5_tiocmset,
 657         .attach                 = spcp8x5_startup,
 658         .release                = spcp8x5_release,
 659         .process_read_urb       = spcp8x5_process_read_urb,
 660 };
 661
 662 static struct usb_serial_driver * const serial_drivers[] = {
 663         &spcp8x5_device, NULL
 664 };
 665
 666 module_usb_serial_driver(spcp8x5_driver, serial_drivers);
 667
 668 MODULE_DESCRIPTION(DRIVER_DESC);
 669 MODULE_VERSION(DRIVER_VERSION);
 670 MODULE_LICENSE("GPL");
 671
 672 module_param(debug, bool, S_IRUGO | S_IWUSR);
 673 MODULE_PARM_DESC(debug, "Debug enabled or not");