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 #define DRIVER_DESC     "SPCP8x5 USB to serial adaptor driver"
  32
  33 #define SPCP8x5_007_VID         0x04FC
  34 #define SPCP8x5_007_PID         0x0201
  35 #define SPCP8x5_008_VID         0x04fc
  36 #define SPCP8x5_008_PID         0x0235
  37 #define SPCP8x5_PHILIPS_VID     0x0471
  38 #define SPCP8x5_PHILIPS_PID     0x081e
  39 #define SPCP8x5_INTERMATIC_VID  0x04FC
  40 #define SPCP8x5_INTERMATIC_PID  0x0204
  41 #define SPCP8x5_835_VID         0x04fc
  42 #define SPCP8x5_835_PID         0x0231
  43
  44 static const struct usb_device_id id_table[] = {
  45         { USB_DEVICE(SPCP8x5_PHILIPS_VID , SPCP8x5_PHILIPS_PID)},
  46         { USB_DEVICE(SPCP8x5_INTERMATIC_VID, SPCP8x5_INTERMATIC_PID)},
  47         { USB_DEVICE(SPCP8x5_835_VID, SPCP8x5_835_PID)},
  48         { USB_DEVICE(SPCP8x5_008_VID, SPCP8x5_008_PID)},
  49         { USB_DEVICE(SPCP8x5_007_VID, SPCP8x5_007_PID)},
  50         { }                                     /* Terminating entry */
  51 };
  52 MODULE_DEVICE_TABLE(usb, id_table);
  53
  54 struct spcp8x5_usb_ctrl_arg {
  55         u8      type;
  56         u8      cmd;
  57         u8      cmd_type;
  58         u16     value;
  59         u16     index;
  60         u16     length;
  61 };
  62
  63
  64 /* spcp8x5 spec register define */
  65 #define MCR_CONTROL_LINE_RTS            0x02
  66 #define MCR_CONTROL_LINE_DTR            0x01
  67 #define MCR_DTR                         0x01
  68 #define MCR_RTS                         0x02
  69
  70 #define MSR_STATUS_LINE_DCD             0x80
  71 #define MSR_STATUS_LINE_RI              0x40
  72 #define MSR_STATUS_LINE_DSR             0x20
  73 #define MSR_STATUS_LINE_CTS             0x10
  74
  75 /* verdor command here , we should define myself */
  76 #define SET_DEFAULT                     0x40
  77 #define SET_DEFAULT_TYPE                0x20
  78
  79 #define SET_UART_FORMAT                 0x40
  80 #define SET_UART_FORMAT_TYPE            0x21
  81 #define SET_UART_FORMAT_SIZE_5          0x00
  82 #define SET_UART_FORMAT_SIZE_6          0x01
  83 #define SET_UART_FORMAT_SIZE_7          0x02
  84 #define SET_UART_FORMAT_SIZE_8          0x03
  85 #define SET_UART_FORMAT_STOP_1          0x00
  86 #define SET_UART_FORMAT_STOP_2          0x04
  87 #define SET_UART_FORMAT_PAR_NONE        0x00
  88 #define SET_UART_FORMAT_PAR_ODD         0x10
  89 #define SET_UART_FORMAT_PAR_EVEN        0x30
  90 #define SET_UART_FORMAT_PAR_MASK        0xD0
  91 #define SET_UART_FORMAT_PAR_SPACE       0x90
  92
  93 #define GET_UART_STATUS_TYPE            0xc0
  94 #define GET_UART_STATUS                 0x22
  95 #define GET_UART_STATUS_MSR             0x06
  96
  97 #define SET_UART_STATUS                 0x40
  98 #define SET_UART_STATUS_TYPE            0x23
  99 #define SET_UART_STATUS_MCR             0x0004
 100 #define SET_UART_STATUS_MCR_DTR         0x01
 101 #define SET_UART_STATUS_MCR_RTS         0x02
 102 #define SET_UART_STATUS_MCR_LOOP        0x10
 103
 104 #define SET_WORKING_MODE                0x40
 105 #define SET_WORKING_MODE_TYPE           0x24
 106 #define SET_WORKING_MODE_U2C            0x00
 107 #define SET_WORKING_MODE_RS485          0x01
 108 #define SET_WORKING_MODE_PDMA           0x02
 109 #define SET_WORKING_MODE_SPP            0x03
 110
 111 #define SET_FLOWCTL_CHAR                0x40
 112 #define SET_FLOWCTL_CHAR_TYPE           0x25
 113
 114 #define GET_VERSION                     0xc0
 115 #define GET_VERSION_TYPE                0x26
 116
 117 #define SET_REGISTER                    0x40
 118 #define SET_REGISTER_TYPE               0x27
 119
 120 #define GET_REGISTER                    0xc0
 121 #define GET_REGISTER_TYPE               0x28
 122
 123 #define SET_RAM                         0x40
 124 #define SET_RAM_TYPE                    0x31
 125
 126 #define GET_RAM                         0xc0
 127 #define GET_RAM_TYPE                    0x32
 128
 129 /* how come ??? */
 130 #define UART_STATE                      0x08
 131 #define UART_STATE_TRANSIENT_MASK       0x75
 132 #define UART_DCD                        0x01
 133 #define UART_DSR                        0x02
 134 #define UART_BREAK_ERROR                0x04
 135 #define UART_RING                       0x08
 136 #define UART_FRAME_ERROR                0x10
 137 #define UART_PARITY_ERROR               0x20
 138 #define UART_OVERRUN_ERROR              0x40
 139 #define UART_CTS                        0x80
 140
 141 enum spcp8x5_type {
 142         SPCP825_007_TYPE,
 143         SPCP825_008_TYPE,
 144         SPCP825_PHILIP_TYPE,
 145         SPCP825_INTERMATIC_TYPE,
 146         SPCP835_TYPE,
 147 };
 148
 149 struct spcp8x5_private {
 150         spinlock_t      lock;
 151         enum spcp8x5_type       type;
 152         wait_queue_head_t       delta_msr_wait;
 153         u8                      line_control;
 154         u8                      line_status;
 155 };
 156
 157 static int spcp8x5_port_probe(struct usb_serial_port *port)
 158 {
 159         struct usb_serial *serial = port->serial;
 160         struct spcp8x5_private *priv;
 161         enum spcp8x5_type type = SPCP825_007_TYPE;
 162         u16 product = le16_to_cpu(serial->dev->descriptor.idProduct);
 163
 164         if (product == 0x0201)
 165                 type = SPCP825_007_TYPE;
 166         else if (product == 0x0231)
 167                 type = SPCP835_TYPE;
 168         else if (product == 0x0235)
 169                 type = SPCP825_008_TYPE;
 170         else if (product == 0x0204)
 171                 type = SPCP825_INTERMATIC_TYPE;
 172         else if (product == 0x0471 &&
 173                  serial->dev->descriptor.idVendor == cpu_to_le16(0x081e))
 174                 type = SPCP825_PHILIP_TYPE;
 175         dev_dbg(&serial->dev->dev, "device type = %d\n", (int)type);
 176
 177         priv = kzalloc(sizeof(*priv), GFP_KERNEL);
 178         if (!priv)
 179                 return -ENOMEM;
 180
 181         spin_lock_init(&priv->lock);
 182         init_waitqueue_head(&priv->delta_msr_wait);
 183         priv->type = type;
 184
 185         usb_set_serial_port_data(port , priv);
 186
 187         return 0;
 188 }
 189
 190 static int spcp8x5_port_remove(struct usb_serial_port *port)
 191 {
 192         struct spcp8x5_private *priv;
 193
 194         priv = usb_get_serial_port_data(port);
 195         kfree(priv);
 196
 197         return 0;
 198 }
 199
 200 /* set the modem control line of the device.
 201  * NOTE spcp825-007 not supported this */
 202 static int spcp8x5_set_ctrlLine(struct usb_device *dev, u8 value,
 203                                 enum spcp8x5_type type)
 204 {
 205         int retval;
 206         u8 mcr = 0 ;
 207
 208         if (type == SPCP825_007_TYPE)
 209                 return -EPERM;
 210
 211         mcr = (unsigned short)value;
 212         retval = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
 213                                  SET_UART_STATUS_TYPE, SET_UART_STATUS,
 214                                  mcr, 0x04, NULL, 0, 100);
 215         if (retval != 0)
 216                 dev_dbg(&dev->dev, "usb_control_msg return %#x\n", retval);
 217         return retval;
 218 }
 219
 220 /* get the modem status register of the device
 221  * NOTE spcp825-007 not supported this */
 222 static int spcp8x5_get_msr(struct usb_device *dev, u8 *status,
 223                            enum spcp8x5_type type)
 224 {
 225         u8 *status_buffer;
 226         int ret;
 227
 228         /* I return Permited not support here but seem inval device
 229          * is more fix */
 230         if (type == SPCP825_007_TYPE)
 231                 return -EPERM;
 232         if (status == NULL)
 233                 return -EINVAL;
 234
 235         status_buffer = kmalloc(1, GFP_KERNEL);
 236         if (!status_buffer)
 237                 return -ENOMEM;
 238         status_buffer[0] = status[0];
 239
 240         ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
 241                               GET_UART_STATUS, GET_UART_STATUS_TYPE,
 242                               0, GET_UART_STATUS_MSR, status_buffer, 1, 100);
 243         if (ret < 0)
 244                 dev_dbg(&dev->dev, "Get MSR = 0x%p failed (error = %d)",
 245                         status_buffer, ret);
 246
 247         dev_dbg(&dev->dev, "0xc0:0x22:0:6  %d - 0x%p ", ret, status_buffer);
 248         status[0] = status_buffer[0];
 249         kfree(status_buffer);
 250
 251         return ret;
 252 }
 253
 254 /* select the work mode.
 255  * NOTE this function not supported by spcp825-007 */
 256 static void spcp8x5_set_workMode(struct usb_device *dev, u16 value,
 257                                  u16 index, enum spcp8x5_type type)
 258 {
 259         int ret;
 260
 261         /* I return Permited not support here but seem inval device
 262          * is more fix */
 263         if (type == SPCP825_007_TYPE)
 264                 return;
 265
 266         ret = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
 267                               SET_WORKING_MODE_TYPE, SET_WORKING_MODE,
 268                               value, index, NULL, 0, 100);
 269         dev_dbg(&dev->dev, "value = %#x , index = %#x\n", value, index);
 270         if (ret < 0)
 271                 dev_dbg(&dev->dev,
 272                         "RTSCTS usb_control_msg(enable flowctrl) = %d\n", ret);
 273 }
 274
 275 static int spcp8x5_carrier_raised(struct usb_serial_port *port)
 276 {
 277         struct spcp8x5_private *priv = usb_get_serial_port_data(port);
 278         if (priv->line_status & MSR_STATUS_LINE_DCD)
 279                 return 1;
 280         return 0;
 281 }
 282
 283 static void spcp8x5_dtr_rts(struct usb_serial_port *port, int on)
 284 {
 285         struct spcp8x5_private *priv = usb_get_serial_port_data(port);
 286         unsigned long flags;
 287         u8 control;
 288
 289         spin_lock_irqsave(&priv->lock, flags);
 290         if (on)
 291                 priv->line_control = MCR_CONTROL_LINE_DTR
 292                                                 | MCR_CONTROL_LINE_RTS;
 293         else
 294                 priv->line_control &= ~ (MCR_CONTROL_LINE_DTR
 295                                                 | MCR_CONTROL_LINE_RTS);
 296         control = priv->line_control;
 297         spin_unlock_irqrestore(&priv->lock, flags);
 298         spcp8x5_set_ctrlLine(port->serial->dev, control , priv->type);
 299 }
 300
 301 static void spcp8x5_init_termios(struct tty_struct *tty)
 302 {
 303         /* for the 1st time call this function */
 304         tty->termios = tty_std_termios;
 305         tty->termios.c_cflag = B115200 | CS8 | CREAD | HUPCL | CLOCAL;
 306         tty->termios.c_ispeed = 115200;
 307         tty->termios.c_ospeed = 115200;
 308 }
 309
 310 /* set the serial param for transfer. we should check if we really need to
 311  * transfer. if we set flow control we should do this too. */
 312 static void spcp8x5_set_termios(struct tty_struct *tty,
 313                 struct usb_serial_port *port, struct ktermios *old_termios)
 314 {
 315         struct usb_serial *serial = port->serial;
 316         struct spcp8x5_private *priv = usb_get_serial_port_data(port);
 317         unsigned long flags;
 318         unsigned int cflag = tty->termios.c_cflag;
 319         unsigned int old_cflag = old_termios->c_cflag;
 320         unsigned short uartdata;
 321         unsigned char buf[2] = {0, 0};
 322         int baud;
 323         int i;
 324         u8 control;
 325
 326
 327         /* check that they really want us to change something */
 328         if (!tty_termios_hw_change(&tty->termios, old_termios))
 329                 return;
 330
 331         /* set DTR/RTS active */
 332         spin_lock_irqsave(&priv->lock, flags);
 333         control = priv->line_control;
 334         if ((old_cflag & CBAUD) == B0) {
 335                 priv->line_control |= MCR_DTR;
 336                 if (!(old_cflag & CRTSCTS))
 337                         priv->line_control |= MCR_RTS;
 338         }
 339         if (control != priv->line_control) {
 340                 control = priv->line_control;
 341                 spin_unlock_irqrestore(&priv->lock, flags);
 342                 spcp8x5_set_ctrlLine(serial->dev, control , priv->type);
 343         } else {
 344                 spin_unlock_irqrestore(&priv->lock, flags);
 345         }
 346
 347         /* Set Baud Rate */
 348         baud = tty_get_baud_rate(tty);
 349         switch (baud) {
 350         case 300:       buf[0] = 0x00;  break;
 351         case 600:       buf[0] = 0x01;  break;
 352         case 1200:      buf[0] = 0x02;  break;
 353         case 2400:      buf[0] = 0x03;  break;
 354         case 4800:      buf[0] = 0x04;  break;
 355         case 9600:      buf[0] = 0x05;  break;
 356         case 19200:     buf[0] = 0x07;  break;
 357         case 38400:     buf[0] = 0x09;  break;
 358         case 57600:     buf[0] = 0x0a;  break;
 359         case 115200:    buf[0] = 0x0b;  break;
 360         case 230400:    buf[0] = 0x0c;  break;
 361         case 460800:    buf[0] = 0x0d;  break;
 362         case 921600:    buf[0] = 0x0e;  break;
 363 /*      case 1200000:   buf[0] = 0x0f;  break; */
 364 /*      case 2400000:   buf[0] = 0x10;  break; */
 365         case 3000000:   buf[0] = 0x11;  break;
 366 /*      case 6000000:   buf[0] = 0x12;  break; */
 367         case 0:
 368         case 1000000:
 369                         buf[0] = 0x0b;  break;
 370         default:
 371                 dev_err(&port->dev, "spcp825 driver does not support the "
 372                         "baudrate requested, using default of 9600.\n");
 373         }
 374
 375         /* Set Data Length : 00:5bit, 01:6bit, 10:7bit, 11:8bit */
 376         if (cflag & CSIZE) {
 377                 switch (cflag & CSIZE) {
 378                 case CS5:
 379                         buf[1] |= SET_UART_FORMAT_SIZE_5;
 380                         break;
 381                 case CS6:
 382                         buf[1] |= SET_UART_FORMAT_SIZE_6;
 383                         break;
 384                 case CS7:
 385                         buf[1] |= SET_UART_FORMAT_SIZE_7;
 386                         break;
 387                 default:
 388                 case CS8:
 389                         buf[1] |= SET_UART_FORMAT_SIZE_8;
 390                         break;
 391                 }
 392         }
 393
 394         /* Set Stop bit2 : 0:1bit 1:2bit */
 395         buf[1] |= (cflag & CSTOPB) ? SET_UART_FORMAT_STOP_2 :
 396                                      SET_UART_FORMAT_STOP_1;
 397
 398         /* Set Parity bit3-4 01:Odd 11:Even */
 399         if (cflag & PARENB) {
 400                 buf[1] |= (cflag & PARODD) ?
 401                 SET_UART_FORMAT_PAR_ODD : SET_UART_FORMAT_PAR_EVEN ;
 402         } else
 403                 buf[1] |= SET_UART_FORMAT_PAR_NONE;
 404
 405         uartdata = buf[0] | buf[1]<<8;
 406
 407         i = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
 408                             SET_UART_FORMAT_TYPE, SET_UART_FORMAT,
 409                             uartdata, 0, NULL, 0, 100);
 410         if (i < 0)
 411                 dev_err(&port->dev, "Set UART format %#x failed (error = %d)\n",
 412                         uartdata, i);
 413         dev_dbg(&port->dev, "0x21:0x40:0:0  %d\n", i);
 414
 415         if (cflag & CRTSCTS) {
 416                 /* enable hardware flow control */
 417                 spcp8x5_set_workMode(serial->dev, 0x000a,
 418                                      SET_WORKING_MODE_U2C, priv->type);
 419         }
 420 }
 421
 422 /* open the serial port. do some usb system call. set termios and get the line
 423  * status of the device. */
 424 static int spcp8x5_open(struct tty_struct *tty, struct usb_serial_port *port)
 425 {
 426         struct ktermios tmp_termios;
 427         struct usb_serial *serial = port->serial;
 428         struct spcp8x5_private *priv = usb_get_serial_port_data(port);
 429         int ret;
 430         unsigned long flags;
 431         u8 status = 0x30;
 432         /* status 0x30 means DSR and CTS = 1 other CDC RI and delta = 0 */
 433
 434         usb_clear_halt(serial->dev, port->write_urb->pipe);
 435         usb_clear_halt(serial->dev, port->read_urb->pipe);
 436
 437         ret = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
 438                               0x09, 0x00,
 439                               0x01, 0x00, NULL, 0x00, 100);
 440         if (ret)
 441                 return ret;
 442
 443         spcp8x5_set_ctrlLine(serial->dev, priv->line_control , priv->type);
 444
 445         /* Setup termios */
 446         if (tty)
 447                 spcp8x5_set_termios(tty, port, &tmp_termios);
 448
 449         spcp8x5_get_msr(serial->dev, &status, priv->type);
 450
 451         /* may be we should update uart status here but now we did not do */
 452         spin_lock_irqsave(&priv->lock, flags);
 453         priv->line_status = status & 0xf0 ;
 454         spin_unlock_irqrestore(&priv->lock, flags);
 455
 456         port->port.drain_delay = 256;
 457
 458         return usb_serial_generic_open(tty, port);
 459 }
 460
 461 static void spcp8x5_process_read_urb(struct urb *urb)
 462 {
 463         struct usb_serial_port *port = urb->context;
 464         struct spcp8x5_private *priv = usb_get_serial_port_data(port);
 465         struct tty_struct *tty;
 466         unsigned char *data = urb->transfer_buffer;
 467         unsigned long flags;
 468         u8 status;
 469         char tty_flag;
 470
 471         /* get tty_flag from status */
 472         tty_flag = TTY_NORMAL;
 473
 474         spin_lock_irqsave(&priv->lock, flags);
 475         status = priv->line_status;
 476         priv->line_status &= ~UART_STATE_TRANSIENT_MASK;
 477         spin_unlock_irqrestore(&priv->lock, flags);
 478         /* wake up the wait for termios */
 479         wake_up_interruptible(&priv->delta_msr_wait);
 480
 481         if (!urb->actual_length)
 482                 return;
 483
 484         tty = tty_port_tty_get(&port->port);
 485         if (!tty)
 486                 return;
 487
 488         if (status & UART_STATE_TRANSIENT_MASK) {
 489                 /* break takes precedence over parity, which takes precedence
 490                  * over framing errors */
 491                 if (status & UART_BREAK_ERROR)
 492                         tty_flag = TTY_BREAK;
 493                 else if (status & UART_PARITY_ERROR)
 494                         tty_flag = TTY_PARITY;
 495                 else if (status & UART_FRAME_ERROR)
 496                         tty_flag = TTY_FRAME;
 497                 dev_dbg(&port->dev, "tty_flag = %d\n", tty_flag);
 498
 499                 /* overrun is special, not associated with a char */
 500                 if (status & UART_OVERRUN_ERROR)
 501                         tty_insert_flip_char(&port->port, 0, TTY_OVERRUN);
 502
 503                 if (status & UART_DCD)
 504                         usb_serial_handle_dcd_change(port, tty,
 505                                    priv->line_status & MSR_STATUS_LINE_DCD);
 506         }
 507
 508         tty_insert_flip_string_fixed_flag(&port->port, data, tty_flag,
 509                                                         urb->actual_length);
 510         tty_flip_buffer_push(tty);
 511         tty_kref_put(tty);
 512 }
 513
 514 static int spcp8x5_wait_modem_info(struct usb_serial_port *port,
 515                                    unsigned int arg)
 516 {
 517         struct spcp8x5_private *priv = usb_get_serial_port_data(port);
 518         unsigned long flags;
 519         unsigned int prevstatus;
 520         unsigned int status;
 521         unsigned int changed;
 522
 523         spin_lock_irqsave(&priv->lock, flags);
 524         prevstatus = priv->line_status;
 525         spin_unlock_irqrestore(&priv->lock, flags);
 526
 527         while (1) {
 528                 /* wake up in bulk read */
 529                 interruptible_sleep_on(&priv->delta_msr_wait);
 530
 531                 /* see if a signal did it */
 532                 if (signal_pending(current))
 533                         return -ERESTARTSYS;
 534
 535                 spin_lock_irqsave(&priv->lock, flags);
 536                 status = priv->line_status;
 537                 spin_unlock_irqrestore(&priv->lock, flags);
 538
 539                 changed = prevstatus^status;
 540
 541                 if (((arg & TIOCM_RNG) && (changed & MSR_STATUS_LINE_RI)) ||
 542                     ((arg & TIOCM_DSR) && (changed & MSR_STATUS_LINE_DSR)) ||
 543                     ((arg & TIOCM_CD)  && (changed & MSR_STATUS_LINE_DCD)) ||
 544                     ((arg & TIOCM_CTS) && (changed & MSR_STATUS_LINE_CTS)))
 545                         return 0;
 546
 547                 prevstatus = status;
 548         }
 549         /* NOTREACHED */
 550         return 0;
 551 }
 552
 553 static int spcp8x5_ioctl(struct tty_struct *tty,
 554                          unsigned int cmd, unsigned long arg)
 555 {
 556         struct usb_serial_port *port = tty->driver_data;
 557
 558         dev_dbg(&port->dev, "%s (%d) cmd = 0x%04x\n", __func__,
 559                 port->number, cmd);
 560
 561         switch (cmd) {
 562         case TIOCMIWAIT:
 563                 dev_dbg(&port->dev, "%s (%d) TIOCMIWAIT\n", __func__,
 564                         port->number);
 565                 return spcp8x5_wait_modem_info(port, arg);
 566
 567         default:
 568                 dev_dbg(&port->dev, "%s not supported = 0x%04x", __func__,
 569                         cmd);
 570                 break;
 571         }
 572
 573         return -ENOIOCTLCMD;
 574 }
 575
 576 static int spcp8x5_tiocmset(struct tty_struct *tty,
 577                             unsigned int set, unsigned int clear)
 578 {
 579         struct usb_serial_port *port = tty->driver_data;
 580         struct spcp8x5_private *priv = usb_get_serial_port_data(port);
 581         unsigned long flags;
 582         u8 control;
 583
 584         spin_lock_irqsave(&priv->lock, flags);
 585         if (set & TIOCM_RTS)
 586                 priv->line_control |= MCR_RTS;
 587         if (set & TIOCM_DTR)
 588                 priv->line_control |= MCR_DTR;
 589         if (clear & TIOCM_RTS)
 590                 priv->line_control &= ~MCR_RTS;
 591         if (clear & TIOCM_DTR)
 592                 priv->line_control &= ~MCR_DTR;
 593         control = priv->line_control;
 594         spin_unlock_irqrestore(&priv->lock, flags);
 595
 596         return spcp8x5_set_ctrlLine(port->serial->dev, control , priv->type);
 597 }
 598
 599 static int spcp8x5_tiocmget(struct tty_struct *tty)
 600 {
 601         struct usb_serial_port *port = tty->driver_data;
 602         struct spcp8x5_private *priv = usb_get_serial_port_data(port);
 603         unsigned long flags;
 604         unsigned int mcr;
 605         unsigned int status;
 606         unsigned int result;
 607
 608         spin_lock_irqsave(&priv->lock, flags);
 609         mcr = priv->line_control;
 610         status = priv->line_status;
 611         spin_unlock_irqrestore(&priv->lock, flags);
 612
 613         result = ((mcr & MCR_DTR)                       ? TIOCM_DTR : 0)
 614                   | ((mcr & MCR_RTS)                    ? TIOCM_RTS : 0)
 615                   | ((status & MSR_STATUS_LINE_CTS)     ? TIOCM_CTS : 0)
 616                   | ((status & MSR_STATUS_LINE_DSR)     ? TIOCM_DSR : 0)
 617                   | ((status & MSR_STATUS_LINE_RI)      ? TIOCM_RI  : 0)
 618                   | ((status & MSR_STATUS_LINE_DCD)     ? TIOCM_CD  : 0);
 619
 620         return result;
 621 }
 622
 623 /* All of the device info needed for the spcp8x5 SIO serial converter */
 624 static struct usb_serial_driver spcp8x5_device = {
 625         .driver = {
 626                 .owner =        THIS_MODULE,
 627                 .name =         "SPCP8x5",
 628         },
 629         .id_table               = id_table,
 630         .num_ports              = 1,
 631         .open                   = spcp8x5_open,
 632         .dtr_rts                = spcp8x5_dtr_rts,
 633         .carrier_raised         = spcp8x5_carrier_raised,
 634         .set_termios            = spcp8x5_set_termios,
 635         .init_termios           = spcp8x5_init_termios,
 636         .ioctl                  = spcp8x5_ioctl,
 637         .tiocmget               = spcp8x5_tiocmget,
 638         .tiocmset               = spcp8x5_tiocmset,
 639         .port_probe             = spcp8x5_port_probe,
 640         .port_remove            = spcp8x5_port_remove,
 641         .process_read_urb       = spcp8x5_process_read_urb,
 642 };
 643
 644 static struct usb_serial_driver * const serial_drivers[] = {
 645         &spcp8x5_device, NULL
 646 };
 647
 648 module_usb_serial_driver(serial_drivers, id_table);
 649
 650 MODULE_DESCRIPTION(DRIVER_DESC);
 651 MODULE_LICENSE("GPL");