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 struct spcp8x5_private {
 155         spinlock_t      lock;
 156         enum spcp8x5_type       type;
 157         wait_queue_head_t       delta_msr_wait;
 158         u8                      line_control;
 159         u8                      line_status;
 160 };
 161
 162 static int spcp8x5_port_probe(struct usb_serial_port *port)
 163 {
 164         struct usb_serial *serial = port->serial;
 165         struct spcp8x5_private *priv;
 166         enum spcp8x5_type type = SPCP825_007_TYPE;
 167         u16 product = le16_to_cpu(serial->dev->descriptor.idProduct);
 168
 169         if (product == 0x0201)
 170                 type = SPCP825_007_TYPE;
 171         else if (product == 0x0231)
 172                 type = SPCP835_TYPE;
 173         else if (product == 0x0235)
 174                 type = SPCP825_008_TYPE;
 175         else if (product == 0x0204)
 176                 type = SPCP825_INTERMATIC_TYPE;
 177         else if (product == 0x0471 &&
 178                  serial->dev->descriptor.idVendor == cpu_to_le16(0x081e))
 179                 type = SPCP825_PHILIP_TYPE;
 180         dev_dbg(&serial->dev->dev, "device type = %d\n", (int)type);
 181
 182         priv = kzalloc(sizeof(*priv), GFP_KERNEL);
 183         if (!priv)
 184                 return -ENOMEM;
 185
 186         spin_lock_init(&priv->lock);
 187         init_waitqueue_head(&priv->delta_msr_wait);
 188         priv->type = type;
 189
 190         usb_set_serial_port_data(port , priv);
 191
 192         return 0;
 193 }
 194
 195 static int spcp8x5_port_remove(struct usb_serial_port *port)
 196 {
 197         struct spcp8x5_private *priv;
 198
 199         priv = usb_get_serial_port_data(port);
 200         kfree(priv);
 201
 202         return 0;
 203 }
 204
 205 /* set the modem control line of the device.
 206  * NOTE spcp825-007 not supported this */
 207 static int spcp8x5_set_ctrlLine(struct usb_device *dev, u8 value,
 208                                 enum spcp8x5_type type)
 209 {
 210         int retval;
 211         u8 mcr = 0 ;
 212
 213         if (type == SPCP825_007_TYPE)
 214                 return -EPERM;
 215
 216         mcr = (unsigned short)value;
 217         retval = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
 218                                  SET_UART_STATUS_TYPE, SET_UART_STATUS,
 219                                  mcr, 0x04, NULL, 0, 100);
 220         if (retval != 0)
 221                 dev_dbg(&dev->dev, "usb_control_msg return %#x\n", retval);
 222         return retval;
 223 }
 224
 225 /* get the modem status register of the device
 226  * NOTE spcp825-007 not supported this */
 227 static int spcp8x5_get_msr(struct usb_device *dev, u8 *status,
 228                            enum spcp8x5_type type)
 229 {
 230         u8 *status_buffer;
 231         int ret;
 232
 233         /* I return Permited not support here but seem inval device
 234          * is more fix */
 235         if (type == SPCP825_007_TYPE)
 236                 return -EPERM;
 237         if (status == NULL)
 238                 return -EINVAL;
 239
 240         status_buffer = kmalloc(1, GFP_KERNEL);
 241         if (!status_buffer)
 242                 return -ENOMEM;
 243         status_buffer[0] = status[0];
 244
 245         ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
 246                               GET_UART_STATUS, GET_UART_STATUS_TYPE,
 247                               0, GET_UART_STATUS_MSR, status_buffer, 1, 100);
 248         if (ret < 0)
 249                 dev_dbg(&dev->dev, "Get MSR = 0x%p failed (error = %d)",
 250                         status_buffer, ret);
 251
 252         dev_dbg(&dev->dev, "0xc0:0x22:0:6  %d - 0x%p ", ret, status_buffer);
 253         status[0] = status_buffer[0];
 254         kfree(status_buffer);
 255
 256         return ret;
 257 }
 258
 259 /* select the work mode.
 260  * NOTE this function not supported by spcp825-007 */
 261 static void spcp8x5_set_workMode(struct usb_device *dev, u16 value,
 262                                  u16 index, enum spcp8x5_type type)
 263 {
 264         int ret;
 265
 266         /* I return Permited not support here but seem inval device
 267          * is more fix */
 268         if (type == SPCP825_007_TYPE)
 269                 return;
 270
 271         ret = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
 272                               SET_WORKING_MODE_TYPE, SET_WORKING_MODE,
 273                               value, index, NULL, 0, 100);
 274         dev_dbg(&dev->dev, "value = %#x , index = %#x\n", value, index);
 275         if (ret < 0)
 276                 dev_dbg(&dev->dev,
 277                         "RTSCTS usb_control_msg(enable flowctrl) = %d\n", ret);
 278 }
 279
 280 static int spcp8x5_carrier_raised(struct usb_serial_port *port)
 281 {
 282         struct spcp8x5_private *priv = usb_get_serial_port_data(port);
 283         if (priv->line_status & MSR_STATUS_LINE_DCD)
 284                 return 1;
 285         return 0;
 286 }
 287
 288 static void spcp8x5_dtr_rts(struct usb_serial_port *port, int on)
 289 {
 290         struct spcp8x5_private *priv = usb_get_serial_port_data(port);
 291         unsigned long flags;
 292         u8 control;
 293
 294         spin_lock_irqsave(&priv->lock, flags);
 295         if (on)
 296                 priv->line_control = MCR_CONTROL_LINE_DTR
 297                                                 | MCR_CONTROL_LINE_RTS;
 298         else
 299                 priv->line_control &= ~ (MCR_CONTROL_LINE_DTR
 300                                                 | MCR_CONTROL_LINE_RTS);
 301         control = priv->line_control;
 302         spin_unlock_irqrestore(&priv->lock, flags);
 303         spcp8x5_set_ctrlLine(port->serial->dev, control , priv->type);
 304 }
 305
 306 static void spcp8x5_init_termios(struct tty_struct *tty)
 307 {
 308         /* for the 1st time call this function */
 309         *(tty->termios) = tty_std_termios;
 310         tty->termios->c_cflag = B115200 | CS8 | CREAD | HUPCL | CLOCAL;
 311         tty->termios->c_ispeed = 115200;
 312         tty->termios->c_ospeed = 115200;
 313 }
 314
 315 /* set the serial param for transfer. we should check if we really need to
 316  * transfer. if we set flow control we should do this too. */
 317 static void spcp8x5_set_termios(struct tty_struct *tty,
 318                 struct usb_serial_port *port, struct ktermios *old_termios)
 319 {
 320         struct usb_serial *serial = port->serial;
 321         struct spcp8x5_private *priv = usb_get_serial_port_data(port);
 322         unsigned long flags;
 323         unsigned int cflag = tty->termios->c_cflag;
 324         unsigned int old_cflag = old_termios->c_cflag;
 325         unsigned short uartdata;
 326         unsigned char buf[2] = {0, 0};
 327         int baud;
 328         int i;
 329         u8 control;
 330
 331
 332         /* check that they really want us to change something */
 333         if (!tty_termios_hw_change(tty->termios, old_termios))
 334                 return;
 335
 336         /* set DTR/RTS active */
 337         spin_lock_irqsave(&priv->lock, flags);
 338         control = priv->line_control;
 339         if ((old_cflag & CBAUD) == B0) {
 340                 priv->line_control |= MCR_DTR;
 341                 if (!(old_cflag & CRTSCTS))
 342                         priv->line_control |= MCR_RTS;
 343         }
 344         if (control != priv->line_control) {
 345                 control = priv->line_control;
 346                 spin_unlock_irqrestore(&priv->lock, flags);
 347                 spcp8x5_set_ctrlLine(serial->dev, control , priv->type);
 348         } else {
 349                 spin_unlock_irqrestore(&priv->lock, flags);
 350         }
 351
 352         /* Set Baud Rate */
 353         baud = tty_get_baud_rate(tty);
 354         switch (baud) {
 355         case 300:       buf[0] = 0x00;  break;
 356         case 600:       buf[0] = 0x01;  break;
 357         case 1200:      buf[0] = 0x02;  break;
 358         case 2400:      buf[0] = 0x03;  break;
 359         case 4800:      buf[0] = 0x04;  break;
 360         case 9600:      buf[0] = 0x05;  break;
 361         case 19200:     buf[0] = 0x07;  break;
 362         case 38400:     buf[0] = 0x09;  break;
 363         case 57600:     buf[0] = 0x0a;  break;
 364         case 115200:    buf[0] = 0x0b;  break;
 365         case 230400:    buf[0] = 0x0c;  break;
 366         case 460800:    buf[0] = 0x0d;  break;
 367         case 921600:    buf[0] = 0x0e;  break;
 368 /*      case 1200000:   buf[0] = 0x0f;  break; */
 369 /*      case 2400000:   buf[0] = 0x10;  break; */
 370         case 3000000:   buf[0] = 0x11;  break;
 371 /*      case 6000000:   buf[0] = 0x12;  break; */
 372         case 0:
 373         case 1000000:
 374                         buf[0] = 0x0b;  break;
 375         default:
 376                 dev_err(&port->dev, "spcp825 driver does not support the "
 377                         "baudrate requested, using default of 9600.\n");
 378         }
 379
 380         /* Set Data Length : 00:5bit, 01:6bit, 10:7bit, 11:8bit */
 381         if (cflag & CSIZE) {
 382                 switch (cflag & CSIZE) {
 383                 case CS5:
 384                         buf[1] |= SET_UART_FORMAT_SIZE_5;
 385                         break;
 386                 case CS6:
 387                         buf[1] |= SET_UART_FORMAT_SIZE_6;
 388                         break;
 389                 case CS7:
 390                         buf[1] |= SET_UART_FORMAT_SIZE_7;
 391                         break;
 392                 default:
 393                 case CS8:
 394                         buf[1] |= SET_UART_FORMAT_SIZE_8;
 395                         break;
 396                 }
 397         }
 398
 399         /* Set Stop bit2 : 0:1bit 1:2bit */
 400         buf[1] |= (cflag & CSTOPB) ? SET_UART_FORMAT_STOP_2 :
 401                                      SET_UART_FORMAT_STOP_1;
 402
 403         /* Set Parity bit3-4 01:Odd 11:Even */
 404         if (cflag & PARENB) {
 405                 buf[1] |= (cflag & PARODD) ?
 406                 SET_UART_FORMAT_PAR_ODD : SET_UART_FORMAT_PAR_EVEN ;
 407         } else
 408                 buf[1] |= SET_UART_FORMAT_PAR_NONE;
 409
 410         uartdata = buf[0] | buf[1]<<8;
 411
 412         i = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
 413                             SET_UART_FORMAT_TYPE, SET_UART_FORMAT,
 414                             uartdata, 0, NULL, 0, 100);
 415         if (i < 0)
 416                 dev_err(&port->dev, "Set UART format %#x failed (error = %d)\n",
 417                         uartdata, i);
 418         dev_dbg(&port->dev, "0x21:0x40:0:0  %d\n", i);
 419
 420         if (cflag & CRTSCTS) {
 421                 /* enable hardware flow control */
 422                 spcp8x5_set_workMode(serial->dev, 0x000a,
 423                                      SET_WORKING_MODE_U2C, priv->type);
 424         }
 425 }
 426
 427 /* open the serial port. do some usb system call. set termios and get the line
 428  * status of the device. */
 429 static int spcp8x5_open(struct tty_struct *tty, struct usb_serial_port *port)
 430 {
 431         struct ktermios tmp_termios;
 432         struct usb_serial *serial = port->serial;
 433         struct spcp8x5_private *priv = usb_get_serial_port_data(port);
 434         int ret;
 435         unsigned long flags;
 436         u8 status = 0x30;
 437         /* status 0x30 means DSR and CTS = 1 other CDC RI and delta = 0 */
 438
 439         usb_clear_halt(serial->dev, port->write_urb->pipe);
 440         usb_clear_halt(serial->dev, port->read_urb->pipe);
 441
 442         ret = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
 443                               0x09, 0x00,
 444                               0x01, 0x00, NULL, 0x00, 100);
 445         if (ret)
 446                 return ret;
 447
 448         spcp8x5_set_ctrlLine(serial->dev, priv->line_control , priv->type);
 449
 450         /* Setup termios */
 451         if (tty)
 452                 spcp8x5_set_termios(tty, port, &tmp_termios);
 453
 454         spcp8x5_get_msr(serial->dev, &status, priv->type);
 455
 456         /* may be we should update uart status here but now we did not do */
 457         spin_lock_irqsave(&priv->lock, flags);
 458         priv->line_status = status & 0xf0 ;
 459         spin_unlock_irqrestore(&priv->lock, flags);
 460
 461         port->port.drain_delay = 256;
 462
 463         return usb_serial_generic_open(tty, port);
 464 }
 465
 466 static void spcp8x5_process_read_urb(struct urb *urb)
 467 {
 468         struct usb_serial_port *port = urb->context;
 469         struct spcp8x5_private *priv = usb_get_serial_port_data(port);
 470         struct tty_struct *tty;
 471         unsigned char *data = urb->transfer_buffer;
 472         unsigned long flags;
 473         u8 status;
 474         char tty_flag;
 475
 476         /* get tty_flag from status */
 477         tty_flag = TTY_NORMAL;
 478
 479         spin_lock_irqsave(&priv->lock, flags);
 480         status = priv->line_status;
 481         priv->line_status &= ~UART_STATE_TRANSIENT_MASK;
 482         spin_unlock_irqrestore(&priv->lock, flags);
 483         /* wake up the wait for termios */
 484         wake_up_interruptible(&priv->delta_msr_wait);
 485
 486         if (!urb->actual_length)
 487                 return;
 488
 489         tty = tty_port_tty_get(&port->port);
 490         if (!tty)
 491                 return;
 492
 493         if (status & UART_STATE_TRANSIENT_MASK) {
 494                 /* break takes precedence over parity, which takes precedence
 495                  * over framing errors */
 496                 if (status & UART_BREAK_ERROR)
 497                         tty_flag = TTY_BREAK;
 498                 else if (status & UART_PARITY_ERROR)
 499                         tty_flag = TTY_PARITY;
 500                 else if (status & UART_FRAME_ERROR)
 501                         tty_flag = TTY_FRAME;
 502                 dev_dbg(&port->dev, "tty_flag = %d\n", tty_flag);
 503
 504                 /* overrun is special, not associated with a char */
 505                 if (status & UART_OVERRUN_ERROR)
 506                         tty_insert_flip_char(tty, 0, TTY_OVERRUN);
 507
 508                 if (status & UART_DCD)
 509                         usb_serial_handle_dcd_change(port, tty,
 510                                    priv->line_status & MSR_STATUS_LINE_DCD);
 511         }
 512
 513         tty_insert_flip_string_fixed_flag(tty, data, tty_flag,
 514                                                         urb->actual_length);
 515         tty_flip_buffer_push(tty);
 516         tty_kref_put(tty);
 517 }
 518
 519 static int spcp8x5_wait_modem_info(struct usb_serial_port *port,
 520                                    unsigned int arg)
 521 {
 522         struct spcp8x5_private *priv = usb_get_serial_port_data(port);
 523         unsigned long flags;
 524         unsigned int prevstatus;
 525         unsigned int status;
 526         unsigned int changed;
 527
 528         spin_lock_irqsave(&priv->lock, flags);
 529         prevstatus = priv->line_status;
 530         spin_unlock_irqrestore(&priv->lock, flags);
 531
 532         while (1) {
 533                 /* wake up in bulk read */
 534                 interruptible_sleep_on(&priv->delta_msr_wait);
 535
 536                 /* see if a signal did it */
 537                 if (signal_pending(current))
 538                         return -ERESTARTSYS;
 539
 540                 spin_lock_irqsave(&priv->lock, flags);
 541                 status = priv->line_status;
 542                 spin_unlock_irqrestore(&priv->lock, flags);
 543
 544                 changed = prevstatus^status;
 545
 546                 if (((arg & TIOCM_RNG) && (changed & MSR_STATUS_LINE_RI)) ||
 547                     ((arg & TIOCM_DSR) && (changed & MSR_STATUS_LINE_DSR)) ||
 548                     ((arg & TIOCM_CD)  && (changed & MSR_STATUS_LINE_DCD)) ||
 549                     ((arg & TIOCM_CTS) && (changed & MSR_STATUS_LINE_CTS)))
 550                         return 0;
 551
 552                 prevstatus = status;
 553         }
 554         /* NOTREACHED */
 555         return 0;
 556 }
 557
 558 static int spcp8x5_ioctl(struct tty_struct *tty,
 559                          unsigned int cmd, unsigned long arg)
 560 {
 561         struct usb_serial_port *port = tty->driver_data;
 562
 563         dev_dbg(&port->dev, "%s (%d) cmd = 0x%04x\n", __func__,
 564                 port->number, cmd);
 565
 566         switch (cmd) {
 567         case TIOCMIWAIT:
 568                 dev_dbg(&port->dev, "%s (%d) TIOCMIWAIT\n", __func__,
 569                         port->number);
 570                 return spcp8x5_wait_modem_info(port, arg);
 571
 572         default:
 573                 dev_dbg(&port->dev, "%s not supported = 0x%04x", __func__,
 574                         cmd);
 575                 break;
 576         }
 577
 578         return -ENOIOCTLCMD;
 579 }
 580
 581 static int spcp8x5_tiocmset(struct tty_struct *tty,
 582                             unsigned int set, unsigned int clear)
 583 {
 584         struct usb_serial_port *port = tty->driver_data;
 585         struct spcp8x5_private *priv = usb_get_serial_port_data(port);
 586         unsigned long flags;
 587         u8 control;
 588
 589         spin_lock_irqsave(&priv->lock, flags);
 590         if (set & TIOCM_RTS)
 591                 priv->line_control |= MCR_RTS;
 592         if (set & TIOCM_DTR)
 593                 priv->line_control |= MCR_DTR;
 594         if (clear & TIOCM_RTS)
 595                 priv->line_control &= ~MCR_RTS;
 596         if (clear & TIOCM_DTR)
 597                 priv->line_control &= ~MCR_DTR;
 598         control = priv->line_control;
 599         spin_unlock_irqrestore(&priv->lock, flags);
 600
 601         return spcp8x5_set_ctrlLine(port->serial->dev, control , priv->type);
 602 }
 603
 604 static int spcp8x5_tiocmget(struct tty_struct *tty)
 605 {
 606         struct usb_serial_port *port = tty->driver_data;
 607         struct spcp8x5_private *priv = usb_get_serial_port_data(port);
 608         unsigned long flags;
 609         unsigned int mcr;
 610         unsigned int status;
 611         unsigned int result;
 612
 613         spin_lock_irqsave(&priv->lock, flags);
 614         mcr = priv->line_control;
 615         status = priv->line_status;
 616         spin_unlock_irqrestore(&priv->lock, flags);
 617
 618         result = ((mcr & MCR_DTR)                       ? TIOCM_DTR : 0)
 619                   | ((mcr & MCR_RTS)                    ? TIOCM_RTS : 0)
 620                   | ((status & MSR_STATUS_LINE_CTS)     ? TIOCM_CTS : 0)
 621                   | ((status & MSR_STATUS_LINE_DSR)     ? TIOCM_DSR : 0)
 622                   | ((status & MSR_STATUS_LINE_RI)      ? TIOCM_RI  : 0)
 623                   | ((status & MSR_STATUS_LINE_DCD)     ? TIOCM_CD  : 0);
 624
 625         return result;
 626 }
 627
 628 /* All of the device info needed for the spcp8x5 SIO serial converter */
 629 static struct usb_serial_driver spcp8x5_device = {
 630         .driver = {
 631                 .owner =        THIS_MODULE,
 632                 .name =         "SPCP8x5",
 633         },
 634         .id_table               = id_table,
 635         .num_ports              = 1,
 636         .open                   = spcp8x5_open,
 637         .dtr_rts                = spcp8x5_dtr_rts,
 638         .carrier_raised         = spcp8x5_carrier_raised,
 639         .set_termios            = spcp8x5_set_termios,
 640         .init_termios           = spcp8x5_init_termios,
 641         .ioctl                  = spcp8x5_ioctl,
 642         .tiocmget               = spcp8x5_tiocmget,
 643         .tiocmset               = spcp8x5_tiocmset,
 644         .port_probe             = spcp8x5_port_probe,
 645         .port_remove            = spcp8x5_port_remove,
 646         .process_read_urb       = spcp8x5_process_read_urb,
 647 };
 648
 649 static struct usb_serial_driver * const serial_drivers[] = {
 650         &spcp8x5_device, NULL
 651 };
 652
 653 module_usb_serial_driver(serial_drivers, id_table);
 654
 655 MODULE_DESCRIPTION(DRIVER_DESC);
 656 MODULE_VERSION(DRIVER_VERSION);
 657 MODULE_LICENSE("GPL");
 658
 659 module_param(debug, bool, S_IRUGO | S_IWUSR);
 660 MODULE_PARM_DESC(debug, "Debug enabled or not");