drivers/usb/serial/pl2303.c

   1 /*
   2  * Prolific PL2303 USB to serial adaptor driver
   3  *
   4  * Copyright (C) 2001-2007 Greg Kroah-Hartman (greg@kroah.com)
   5  * Copyright (C) 2003 IBM Corp.
   6  *
   7  * Original driver for 2.2.x by anonymous
   8  *
   9  *      This program is free software; you can redistribute it and/or
  10  *      modify it under the terms of the GNU General Public License version
  11  *      2 as published by the Free Software Foundation.
  12  *
  13  * See Documentation/usb/usb-serial.txt for more information on using this
  14  * driver
  15  *
  16  */
  17
  18 #include <linux/kernel.h>
  19 #include <linux/errno.h>
  20 #include <linux/init.h>
  21 #include <linux/slab.h>
  22 #include <linux/tty.h>
  23 #include <linux/tty_driver.h>
  24 #include <linux/tty_flip.h>
  25 #include <linux/serial.h>
  26 #include <linux/module.h>
  27 #include <linux/moduleparam.h>
  28 #include <linux/spinlock.h>
  29 #include <linux/uaccess.h>
  30 #include <linux/usb.h>
  31 #include <linux/usb/serial.h>
  32 #include "pl2303.h"
  33
  34 /*
  35  * Version Information
  36  */
  37 #define DRIVER_DESC "Prolific PL2303 USB to serial adaptor driver"
  38
  39 static const struct usb_device_id id_table[] = {
  40         { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID) },
  41         { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_RSAQ2) },
  42         { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_DCU11) },
  43         { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_RSAQ3) },
  44         { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_PHAROS) },
  45         { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_ALDIGA) },
  46         { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_MMX) },
  47         { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_GPRS) },
  48         { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_HCR331) },
  49         { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_MOTOROLA) },
  50         { USB_DEVICE(IODATA_VENDOR_ID, IODATA_PRODUCT_ID) },
  51         { USB_DEVICE(IODATA_VENDOR_ID, IODATA_PRODUCT_ID_RSAQ5) },
  52         { USB_DEVICE(ATEN_VENDOR_ID, ATEN_PRODUCT_ID) },
  53         { USB_DEVICE(ATEN_VENDOR_ID2, ATEN_PRODUCT_ID) },
  54         { USB_DEVICE(ELCOM_VENDOR_ID, ELCOM_PRODUCT_ID) },
  55         { USB_DEVICE(ELCOM_VENDOR_ID, ELCOM_PRODUCT_ID_UCSGT) },
  56         { USB_DEVICE(ITEGNO_VENDOR_ID, ITEGNO_PRODUCT_ID) },
  57         { USB_DEVICE(ITEGNO_VENDOR_ID, ITEGNO_PRODUCT_ID_2080) },
  58         { USB_DEVICE(MA620_VENDOR_ID, MA620_PRODUCT_ID) },
  59         { USB_DEVICE(RATOC_VENDOR_ID, RATOC_PRODUCT_ID) },
  60         { USB_DEVICE(TRIPP_VENDOR_ID, TRIPP_PRODUCT_ID) },
  61         { USB_DEVICE(RADIOSHACK_VENDOR_ID, RADIOSHACK_PRODUCT_ID) },
  62         { USB_DEVICE(DCU10_VENDOR_ID, DCU10_PRODUCT_ID) },
  63         { USB_DEVICE(SITECOM_VENDOR_ID, SITECOM_PRODUCT_ID) },
  64         { USB_DEVICE(ALCATEL_VENDOR_ID, ALCATEL_PRODUCT_ID) },
  65         { USB_DEVICE(SAMSUNG_VENDOR_ID, SAMSUNG_PRODUCT_ID) },
  66         { USB_DEVICE(SIEMENS_VENDOR_ID, SIEMENS_PRODUCT_ID_SX1) },
  67         { USB_DEVICE(SIEMENS_VENDOR_ID, SIEMENS_PRODUCT_ID_X65) },
  68         { USB_DEVICE(SIEMENS_VENDOR_ID, SIEMENS_PRODUCT_ID_X75) },
  69         { USB_DEVICE(SIEMENS_VENDOR_ID, SIEMENS_PRODUCT_ID_EF81) },
  70         { USB_DEVICE(BENQ_VENDOR_ID, BENQ_PRODUCT_ID_S81) }, /* Benq/Siemens S81 */
  71         { USB_DEVICE(SYNTECH_VENDOR_ID, SYNTECH_PRODUCT_ID) },
  72         { USB_DEVICE(NOKIA_CA42_VENDOR_ID, NOKIA_CA42_PRODUCT_ID) },
  73         { USB_DEVICE(CA_42_CA42_VENDOR_ID, CA_42_CA42_PRODUCT_ID) },
  74         { USB_DEVICE(SAGEM_VENDOR_ID, SAGEM_PRODUCT_ID) },
  75         { USB_DEVICE(LEADTEK_VENDOR_ID, LEADTEK_9531_PRODUCT_ID) },
  76         { USB_DEVICE(SPEEDDRAGON_VENDOR_ID, SPEEDDRAGON_PRODUCT_ID) },
  77         { USB_DEVICE(DATAPILOT_U2_VENDOR_ID, DATAPILOT_U2_PRODUCT_ID) },
  78         { USB_DEVICE(BELKIN_VENDOR_ID, BELKIN_PRODUCT_ID) },
  79         { USB_DEVICE(ALCOR_VENDOR_ID, ALCOR_PRODUCT_ID) },
  80         { USB_DEVICE(WS002IN_VENDOR_ID, WS002IN_PRODUCT_ID) },
  81         { USB_DEVICE(COREGA_VENDOR_ID, COREGA_PRODUCT_ID) },
  82         { USB_DEVICE(YCCABLE_VENDOR_ID, YCCABLE_PRODUCT_ID) },
  83         { USB_DEVICE(SUPERIAL_VENDOR_ID, SUPERIAL_PRODUCT_ID) },
  84         { USB_DEVICE(HP_VENDOR_ID, HP_LD220_PRODUCT_ID) },
  85         { USB_DEVICE(CRESSI_VENDOR_ID, CRESSI_EDY_PRODUCT_ID) },
  86         { USB_DEVICE(ZEAGLE_VENDOR_ID, ZEAGLE_N2ITION3_PRODUCT_ID) },
  87         { USB_DEVICE(SONY_VENDOR_ID, SONY_QN3USB_PRODUCT_ID) },
  88         { USB_DEVICE(SANWA_VENDOR_ID, SANWA_PRODUCT_ID) },
  89         { USB_DEVICE(ADLINK_VENDOR_ID, ADLINK_ND6530_PRODUCT_ID) },
  90         { USB_DEVICE(SMART_VENDOR_ID, SMART_PRODUCT_ID) },
  91         { }                                     /* Terminating entry */
  92 };
  93
  94 MODULE_DEVICE_TABLE(usb, id_table);
  95
  96 #define SET_LINE_REQUEST_TYPE           0x21
  97 #define SET_LINE_REQUEST                0x20
  98
  99 #define SET_CONTROL_REQUEST_TYPE        0x21
 100 #define SET_CONTROL_REQUEST             0x22
 101 #define CONTROL_DTR                     0x01
 102 #define CONTROL_RTS                     0x02
 103
 104 #define BREAK_REQUEST_TYPE              0x21
 105 #define BREAK_REQUEST                   0x23
 106 #define BREAK_ON                        0xffff
 107 #define BREAK_OFF                       0x0000
 108
 109 #define GET_LINE_REQUEST_TYPE           0xa1
 110 #define GET_LINE_REQUEST                0x21
 111
 112 #define VENDOR_WRITE_REQUEST_TYPE       0x40
 113 #define VENDOR_WRITE_REQUEST            0x01
 114
 115 #define VENDOR_READ_REQUEST_TYPE        0xc0
 116 #define VENDOR_READ_REQUEST             0x01
 117
 118 #define UART_STATE                      0x08
 119 #define UART_STATE_TRANSIENT_MASK       0x74
 120 #define UART_DCD                        0x01
 121 #define UART_DSR                        0x02
 122 #define UART_BREAK_ERROR                0x04
 123 #define UART_RING                       0x08
 124 #define UART_FRAME_ERROR                0x10
 125 #define UART_PARITY_ERROR               0x20
 126 #define UART_OVERRUN_ERROR              0x40
 127 #define UART_CTS                        0x80
 128
 129
 130 enum pl2303_type {
 131         type_0,         /* don't know the difference between type 0 and */
 132         type_1,         /* type 1, until someone from prolific tells us... */
 133         HX,             /* HX version of the pl2303 chip */
 134 };
 135
 136 struct pl2303_serial_private {
 137         enum pl2303_type type;
 138 };
 139
 140 struct pl2303_private {
 141         spinlock_t lock;
 142         u8 line_control;
 143         u8 line_status;
 144
 145         u8 line_settings[7];
 146 };
 147
 148 static int pl2303_vendor_read(__u16 value, __u16 index,
 149                 struct usb_serial *serial, unsigned char *buf)
 150 {
 151         int res = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
 152                         VENDOR_READ_REQUEST, VENDOR_READ_REQUEST_TYPE,
 153                         value, index, buf, 1, 100);
 154         dev_dbg(&serial->interface->dev, "0x%x:0x%x:0x%x:0x%x  %d - %x\n",
 155                 VENDOR_READ_REQUEST_TYPE, VENDOR_READ_REQUEST, value, index,
 156                 res, buf[0]);
 157         return res;
 158 }
 159
 160 static int pl2303_vendor_write(__u16 value, __u16 index,
 161                 struct usb_serial *serial)
 162 {
 163         int res = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
 164                         VENDOR_WRITE_REQUEST, VENDOR_WRITE_REQUEST_TYPE,
 165                         value, index, NULL, 0, 100);
 166         dev_dbg(&serial->interface->dev, "0x%x:0x%x:0x%x:0x%x  %d\n",
 167                 VENDOR_WRITE_REQUEST_TYPE, VENDOR_WRITE_REQUEST, value, index,
 168                 res);
 169         return res;
 170 }
 171
 172 static int pl2303_startup(struct usb_serial *serial)
 173 {
 174         struct pl2303_serial_private *spriv;
 175         enum pl2303_type type = type_0;
 176         unsigned char *buf;
 177
 178         spriv = kzalloc(sizeof(*spriv), GFP_KERNEL);
 179         if (!spriv)
 180                 return -ENOMEM;
 181
 182         buf = kmalloc(10, GFP_KERNEL);
 183         if (!buf) {
 184                 kfree(spriv);
 185                 return -ENOMEM;
 186         }
 187
 188         if (serial->dev->descriptor.bDeviceClass == 0x02)
 189                 type = type_0;
 190         else if (serial->dev->descriptor.bMaxPacketSize0 == 0x40)
 191                 type = HX;
 192         else if (serial->dev->descriptor.bDeviceClass == 0x00)
 193                 type = type_1;
 194         else if (serial->dev->descriptor.bDeviceClass == 0xFF)
 195                 type = type_1;
 196         dev_dbg(&serial->interface->dev, "device type: %d\n", type);
 197
 198         spriv->type = type;
 199         usb_set_serial_data(serial, spriv);
 200
 201         pl2303_vendor_read(0x8484, 0, serial, buf);
 202         pl2303_vendor_write(0x0404, 0, serial);
 203         pl2303_vendor_read(0x8484, 0, serial, buf);
 204         pl2303_vendor_read(0x8383, 0, serial, buf);
 205         pl2303_vendor_read(0x8484, 0, serial, buf);
 206         pl2303_vendor_write(0x0404, 1, serial);
 207         pl2303_vendor_read(0x8484, 0, serial, buf);
 208         pl2303_vendor_read(0x8383, 0, serial, buf);
 209         pl2303_vendor_write(0, 1, serial);
 210         pl2303_vendor_write(1, 0, serial);
 211         if (type == HX)
 212                 pl2303_vendor_write(2, 0x44, serial);
 213         else
 214                 pl2303_vendor_write(2, 0x24, serial);
 215
 216         kfree(buf);
 217         return 0;
 218 }
 219
 220 static void pl2303_release(struct usb_serial *serial)
 221 {
 222         struct pl2303_serial_private *spriv;
 223
 224         spriv = usb_get_serial_data(serial);
 225         kfree(spriv);
 226 }
 227
 228 static int pl2303_port_probe(struct usb_serial_port *port)
 229 {
 230         struct pl2303_private *priv;
 231
 232         priv = kzalloc(sizeof(*priv), GFP_KERNEL);
 233         if (!priv)
 234                 return -ENOMEM;
 235
 236         spin_lock_init(&priv->lock);
 237
 238         usb_set_serial_port_data(port, priv);
 239
 240         return 0;
 241 }
 242
 243 static int pl2303_port_remove(struct usb_serial_port *port)
 244 {
 245         struct pl2303_private *priv;
 246
 247         priv = usb_get_serial_port_data(port);
 248         kfree(priv);
 249
 250         return 0;
 251 }
 252
 253 static int pl2303_set_control_lines(struct usb_serial_port *port, u8 value)
 254 {
 255         struct usb_device *dev = port->serial->dev;
 256         int retval;
 257
 258         retval = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
 259                                  SET_CONTROL_REQUEST, SET_CONTROL_REQUEST_TYPE,
 260                                  value, 0, NULL, 0, 100);
 261         dev_dbg(&port->dev, "%s - value = %d, retval = %d\n", __func__,
 262                 value, retval);
 263         return retval;
 264 }
 265
 266 static void pl2303_set_termios(struct tty_struct *tty,
 267                 struct usb_serial_port *port, struct ktermios *old_termios)
 268 {
 269         struct usb_serial *serial = port->serial;
 270         struct pl2303_serial_private *spriv = usb_get_serial_data(serial);
 271         struct pl2303_private *priv = usb_get_serial_port_data(port);
 272         unsigned long flags;
 273         unsigned int cflag;
 274         unsigned char *buf;
 275         int baud;
 276         int i;
 277         u8 control;
 278         const int baud_sup[] = { 75, 150, 300, 600, 1200, 1800, 2400, 3600,
 279                                  4800, 7200, 9600, 14400, 19200, 28800, 38400,
 280                                  57600, 115200, 230400, 460800, 614400,
 281                                  921600, 1228800, 2457600, 3000000, 6000000 };
 282         int baud_floor, baud_ceil;
 283         int k;
 284
 285         if (old_termios && !tty_termios_hw_change(&tty->termios, old_termios))
 286                 return;
 287
 288         cflag = tty->termios.c_cflag;
 289
 290         buf = kzalloc(7, GFP_KERNEL);
 291         if (!buf) {
 292                 dev_err(&port->dev, "%s - out of memory.\n", __func__);
 293                 /* Report back no change occurred */
 294                 if (old_termios)
 295                         tty->termios = *old_termios;
 296                 return;
 297         }
 298
 299         i = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
 300                             GET_LINE_REQUEST, GET_LINE_REQUEST_TYPE,
 301                             0, 0, buf, 7, 100);
 302         dev_dbg(&port->dev, "0xa1:0x21:0:0  %d - %x %x %x %x %x %x %x\n", i,
 303             buf[0], buf[1], buf[2], buf[3], buf[4], buf[5], buf[6]);
 304
 305         switch (cflag & CSIZE) {
 306         case CS5:
 307                 buf[6] = 5;
 308                 break;
 309         case CS6:
 310                 buf[6] = 6;
 311                 break;
 312         case CS7:
 313                 buf[6] = 7;
 314                 break;
 315         default:
 316         case CS8:
 317                 buf[6] = 8;
 318                 break;
 319         }
 320         dev_dbg(&port->dev, "data bits = %d\n", buf[6]);
 321
 322         /* For reference buf[0]:buf[3] baud rate value */
 323         /* NOTE: Only the values defined in baud_sup are supported !
 324          *       => if unsupported values are set, the PL2303 seems to use
 325          *          9600 baud (at least my PL2303X always does)
 326          */
 327         baud = tty_get_baud_rate(tty);
 328         dev_dbg(&port->dev, "baud requested = %d\n", baud);
 329         if (baud) {
 330                 /* Set baudrate to nearest supported value */
 331                 for (k=0; k<ARRAY_SIZE(baud_sup); k++) {
 332                         if (baud_sup[k] / baud) {
 333                                 baud_ceil = baud_sup[k];
 334                                 if (k==0) {
 335                                         baud = baud_ceil;
 336                                 } else {
 337                                         baud_floor = baud_sup[k-1];
 338                                         if ((baud_ceil % baud)
 339                                             > (baud % baud_floor))
 340                                                 baud = baud_floor;
 341                                         else
 342                                                 baud = baud_ceil;
 343                                 }
 344                                 break;
 345                         }
 346                 }
 347                 if (baud > 1228800) {
 348                         /* type_0, type_1 only support up to 1228800 baud */
 349                         if (spriv->type != HX)
 350                                 baud = 1228800;
 351                         else if (baud > 6000000)
 352                                 baud = 6000000;
 353                 }
 354                 dev_dbg(&port->dev, "baud set = %d\n", baud);
 355                 if (baud <= 115200) {
 356                         buf[0] = baud & 0xff;
 357                         buf[1] = (baud >> 8) & 0xff;
 358                         buf[2] = (baud >> 16) & 0xff;
 359                         buf[3] = (baud >> 24) & 0xff;
 360                 } else {
 361                         /* apparently the formula for higher speeds is:
 362                          * baudrate = 12M * 32 / (2^buf[1]) / buf[0]
 363                          */
 364                         unsigned tmp = 12*1000*1000*32 / baud;
 365                         buf[3] = 0x80;
 366                         buf[2] = 0;
 367                         buf[1] = (tmp >= 256);
 368                         while (tmp >= 256) {
 369                                 tmp >>= 2;
 370                                 buf[1] <<= 1;
 371                         }
 372                         buf[0] = tmp;
 373                 }
 374         }
 375
 376         /* For reference buf[4]=0 is 1 stop bits */
 377         /* For reference buf[4]=1 is 1.5 stop bits */
 378         /* For reference buf[4]=2 is 2 stop bits */
 379         if (cflag & CSTOPB) {
 380                 /* NOTE: Comply with "real" UARTs / RS232:
 381                  *       use 1.5 instead of 2 stop bits with 5 data bits
 382                  */
 383                 if ((cflag & CSIZE) == CS5) {
 384                         buf[4] = 1;
 385                         dev_dbg(&port->dev, "stop bits = 1.5\n");
 386                 } else {
 387                         buf[4] = 2;
 388                         dev_dbg(&port->dev, "stop bits = 2\n");
 389                 }
 390         } else {
 391                 buf[4] = 0;
 392                 dev_dbg(&port->dev, "stop bits = 1\n");
 393         }
 394
 395         if (cflag & PARENB) {
 396                 /* For reference buf[5]=0 is none parity */
 397                 /* For reference buf[5]=1 is odd parity */
 398                 /* For reference buf[5]=2 is even parity */
 399                 /* For reference buf[5]=3 is mark parity */
 400                 /* For reference buf[5]=4 is space parity */
 401                 if (cflag & PARODD) {
 402                         if (cflag & CMSPAR) {
 403                                 buf[5] = 3;
 404                                 dev_dbg(&port->dev, "parity = mark\n");
 405                         } else {
 406                                 buf[5] = 1;
 407                                 dev_dbg(&port->dev, "parity = odd\n");
 408                         }
 409                 } else {
 410                         if (cflag & CMSPAR) {
 411                                 buf[5] = 4;
 412                                 dev_dbg(&port->dev, "parity = space\n");
 413                         } else {
 414                                 buf[5] = 2;
 415                                 dev_dbg(&port->dev, "parity = even\n");
 416                         }
 417                 }
 418         } else {
 419                 buf[5] = 0;
 420                 dev_dbg(&port->dev, "parity = none\n");
 421         }
 422
 423         /*
 424          * Some PL2303 are known to lose bytes if you change serial settings
 425          * even to the same values as before. Thus we actually need to filter
 426          * in this specific case.
 427          *
 428          * Note that the tty_termios_hw_change check above is not sufficient
 429          * as a previously requested baud rate may differ from the one
 430          * actually used (and stored in old_termios).
 431          *
 432          * NOTE: No additional locking needed for line_settings as it is
 433          *       only used in set_termios, which is serialised against itself.
 434          */
 435         if (!old_termios || memcmp(buf, priv->line_settings, 7)) {
 436                 i = usb_control_msg(serial->dev,
 437                                     usb_sndctrlpipe(serial->dev, 0),
 438                                     SET_LINE_REQUEST, SET_LINE_REQUEST_TYPE,
 439                                     0, 0, buf, 7, 100);
 440
 441                 dev_dbg(&port->dev, "0x21:0x20:0:0  %d\n", i);
 442
 443                 if (i == 7)
 444                         memcpy(priv->line_settings, buf, 7);
 445         }
 446
 447         /* change control lines if we are switching to or from B0 */
 448         spin_lock_irqsave(&priv->lock, flags);
 449         control = priv->line_control;
 450         if ((cflag & CBAUD) == B0)
 451                 priv->line_control &= ~(CONTROL_DTR | CONTROL_RTS);
 452         else if (old_termios && (old_termios->c_cflag & CBAUD) == B0)
 453                 priv->line_control |= (CONTROL_DTR | CONTROL_RTS);
 454         if (control != priv->line_control) {
 455                 control = priv->line_control;
 456                 spin_unlock_irqrestore(&priv->lock, flags);
 457                 pl2303_set_control_lines(port, control);
 458         } else {
 459                 spin_unlock_irqrestore(&priv->lock, flags);
 460         }
 461
 462         buf[0] = buf[1] = buf[2] = buf[3] = buf[4] = buf[5] = buf[6] = 0;
 463
 464         i = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
 465                             GET_LINE_REQUEST, GET_LINE_REQUEST_TYPE,
 466                             0, 0, buf, 7, 100);
 467         dev_dbg(&port->dev, "0xa1:0x21:0:0  %d - %x %x %x %x %x %x %x\n", i,
 468              buf[0], buf[1], buf[2], buf[3], buf[4], buf[5], buf[6]);
 469
 470         if (cflag & CRTSCTS) {
 471                 if (spriv->type == HX)
 472                         pl2303_vendor_write(0x0, 0x61, serial);
 473                 else
 474                         pl2303_vendor_write(0x0, 0x41, serial);
 475         } else {
 476                 pl2303_vendor_write(0x0, 0x0, serial);
 477         }
 478
 479         /* Save resulting baud rate */
 480         if (baud)
 481                 tty_encode_baud_rate(tty, baud, baud);
 482
 483         kfree(buf);
 484 }
 485
 486 static void pl2303_dtr_rts(struct usb_serial_port *port, int on)
 487 {
 488         struct pl2303_private *priv = usb_get_serial_port_data(port);
 489         unsigned long flags;
 490         u8 control;
 491
 492         spin_lock_irqsave(&priv->lock, flags);
 493         /* Change DTR and RTS */
 494         if (on)
 495                 priv->line_control |= (CONTROL_DTR | CONTROL_RTS);
 496         else
 497                 priv->line_control &= ~(CONTROL_DTR | CONTROL_RTS);
 498         control = priv->line_control;
 499         spin_unlock_irqrestore(&priv->lock, flags);
 500         pl2303_set_control_lines(port, control);
 501 }
 502
 503 static void pl2303_close(struct usb_serial_port *port)
 504 {
 505         usb_serial_generic_close(port);
 506         usb_kill_urb(port->interrupt_in_urb);
 507 }
 508
 509 static int pl2303_open(struct tty_struct *tty, struct usb_serial_port *port)
 510 {
 511         struct usb_serial *serial = port->serial;
 512         struct pl2303_serial_private *spriv = usb_get_serial_data(serial);
 513         int result;
 514
 515         if (spriv->type != HX) {
 516                 usb_clear_halt(serial->dev, port->write_urb->pipe);
 517                 usb_clear_halt(serial->dev, port->read_urb->pipe);
 518         } else {
 519                 /* reset upstream data pipes */
 520                 pl2303_vendor_write(8, 0, serial);
 521                 pl2303_vendor_write(9, 0, serial);
 522         }
 523
 524         /* Setup termios */
 525         if (tty)
 526                 pl2303_set_termios(tty, port, NULL);
 527
 528         result = usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL);
 529         if (result) {
 530                 dev_err(&port->dev, "%s - failed submitting interrupt urb,"
 531                         " error %d\n", __func__, result);
 532                 return result;
 533         }
 534
 535         result = usb_serial_generic_open(tty, port);
 536         if (result) {
 537                 usb_kill_urb(port->interrupt_in_urb);
 538                 return result;
 539         }
 540
 541         port->port.drain_delay = 256;
 542         return 0;
 543 }
 544
 545 static int pl2303_tiocmset(struct tty_struct *tty,
 546                            unsigned int set, unsigned int clear)
 547 {
 548         struct usb_serial_port *port = tty->driver_data;
 549         struct pl2303_private *priv = usb_get_serial_port_data(port);
 550         unsigned long flags;
 551         u8 control;
 552         int ret;
 553
 554         spin_lock_irqsave(&priv->lock, flags);
 555         if (set & TIOCM_RTS)
 556                 priv->line_control |= CONTROL_RTS;
 557         if (set & TIOCM_DTR)
 558                 priv->line_control |= CONTROL_DTR;
 559         if (clear & TIOCM_RTS)
 560                 priv->line_control &= ~CONTROL_RTS;
 561         if (clear & TIOCM_DTR)
 562                 priv->line_control &= ~CONTROL_DTR;
 563         control = priv->line_control;
 564         spin_unlock_irqrestore(&priv->lock, flags);
 565
 566         ret = pl2303_set_control_lines(port, control);
 567         if (ret)
 568                 return usb_translate_errors(ret);
 569
 570         return 0;
 571 }
 572
 573 static int pl2303_tiocmget(struct tty_struct *tty)
 574 {
 575         struct usb_serial_port *port = tty->driver_data;
 576         struct pl2303_private *priv = usb_get_serial_port_data(port);
 577         unsigned long flags;
 578         unsigned int mcr;
 579         unsigned int status;
 580         unsigned int result;
 581
 582         spin_lock_irqsave(&priv->lock, flags);
 583         mcr = priv->line_control;
 584         status = priv->line_status;
 585         spin_unlock_irqrestore(&priv->lock, flags);
 586
 587         result = ((mcr & CONTROL_DTR)           ? TIOCM_DTR : 0)
 588                   | ((mcr & CONTROL_RTS)        ? TIOCM_RTS : 0)
 589                   | ((status & UART_CTS)        ? TIOCM_CTS : 0)
 590                   | ((status & UART_DSR)        ? TIOCM_DSR : 0)
 591                   | ((status & UART_RING)       ? TIOCM_RI  : 0)
 592                   | ((status & UART_DCD)        ? TIOCM_CD  : 0);
 593
 594         dev_dbg(&port->dev, "%s - result = %x\n", __func__, result);
 595
 596         return result;
 597 }
 598
 599 static int pl2303_carrier_raised(struct usb_serial_port *port)
 600 {
 601         struct pl2303_private *priv = usb_get_serial_port_data(port);
 602         if (priv->line_status & UART_DCD)
 603                 return 1;
 604         return 0;
 605 }
 606
 607 static int pl2303_tiocmiwait(struct tty_struct *tty, unsigned long arg)
 608 {
 609         struct usb_serial_port *port = tty->driver_data;
 610         struct pl2303_private *priv = usb_get_serial_port_data(port);
 611         unsigned long flags;
 612         unsigned int prevstatus;
 613         unsigned int status;
 614         unsigned int changed;
 615
 616         spin_lock_irqsave(&priv->lock, flags);
 617         prevstatus = priv->line_status;
 618         spin_unlock_irqrestore(&priv->lock, flags);
 619
 620         while (1) {
 621                 interruptible_sleep_on(&port->port.delta_msr_wait);
 622                 /* see if a signal did it */
 623                 if (signal_pending(current))
 624                         return -ERESTARTSYS;
 625
 626                 if (port->serial->disconnected)
 627                         return -EIO;
 628
 629                 spin_lock_irqsave(&priv->lock, flags);
 630                 status = priv->line_status;
 631                 spin_unlock_irqrestore(&priv->lock, flags);
 632
 633                 changed = prevstatus ^ status;
 634
 635                 if (((arg & TIOCM_RNG) && (changed & UART_RING)) ||
 636                     ((arg & TIOCM_DSR) && (changed & UART_DSR)) ||
 637                     ((arg & TIOCM_CD)  && (changed & UART_DCD)) ||
 638                     ((arg & TIOCM_CTS) && (changed & UART_CTS))) {
 639                         return 0;
 640                 }
 641                 prevstatus = status;
 642         }
 643         /* NOTREACHED */
 644         return 0;
 645 }
 646
 647 static int pl2303_ioctl(struct tty_struct *tty,
 648                         unsigned int cmd, unsigned long arg)
 649 {
 650         struct serial_struct ser;
 651         struct usb_serial_port *port = tty->driver_data;
 652
 653         dev_dbg(&port->dev, "%s cmd = 0x%04x\n", __func__, cmd);
 654
 655         switch (cmd) {
 656         case TIOCGSERIAL:
 657                 memset(&ser, 0, sizeof ser);
 658                 ser.type = PORT_16654;
 659                 ser.line = port->serial->minor;
 660                 ser.port = port->number;
 661                 ser.baud_base = 460800;
 662
 663                 if (copy_to_user((void __user *)arg, &ser, sizeof ser))
 664                         return -EFAULT;
 665
 666                 return 0;
 667         default:
 668                 dev_dbg(&port->dev, "%s not supported = 0x%04x\n", __func__, cmd);
 669                 break;
 670         }
 671         return -ENOIOCTLCMD;
 672 }
 673
 674 static void pl2303_break_ctl(struct tty_struct *tty, int break_state)
 675 {
 676         struct usb_serial_port *port = tty->driver_data;
 677         struct usb_serial *serial = port->serial;
 678         u16 state;
 679         int result;
 680
 681         if (break_state == 0)
 682                 state = BREAK_OFF;
 683         else
 684                 state = BREAK_ON;
 685         dev_dbg(&port->dev, "%s - turning break %s\n", __func__,
 686                         state == BREAK_OFF ? "off" : "on");
 687
 688         result = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
 689                                  BREAK_REQUEST, BREAK_REQUEST_TYPE, state,
 690                                  0, NULL, 0, 100);
 691         if (result)
 692                 dev_err(&port->dev, "error sending break = %d\n", result);
 693 }
 694
 695 static void pl2303_update_line_status(struct usb_serial_port *port,
 696                                       unsigned char *data,
 697                                       unsigned int actual_length)
 698 {
 699
 700         struct pl2303_private *priv = usb_get_serial_port_data(port);
 701         struct tty_struct *tty;
 702         unsigned long flags;
 703         u8 status_idx = UART_STATE;
 704         u8 length = UART_STATE + 1;
 705         u8 prev_line_status;
 706         u16 idv, idp;
 707
 708         idv = le16_to_cpu(port->serial->dev->descriptor.idVendor);
 709         idp = le16_to_cpu(port->serial->dev->descriptor.idProduct);
 710
 711
 712         if (idv == SIEMENS_VENDOR_ID) {
 713                 if (idp == SIEMENS_PRODUCT_ID_X65 ||
 714                     idp == SIEMENS_PRODUCT_ID_SX1 ||
 715                     idp == SIEMENS_PRODUCT_ID_X75) {
 716
 717                         length = 1;
 718                         status_idx = 0;
 719                 }
 720         }
 721
 722         if (actual_length < length)
 723                 return;
 724
 725         /* Save off the uart status for others to look at */
 726         spin_lock_irqsave(&priv->lock, flags);
 727         prev_line_status = priv->line_status;
 728         priv->line_status = data[status_idx];
 729         spin_unlock_irqrestore(&priv->lock, flags);
 730         if (priv->line_status & UART_BREAK_ERROR)
 731                 usb_serial_handle_break(port);
 732         wake_up_interruptible(&port->port.delta_msr_wait);
 733
 734         tty = tty_port_tty_get(&port->port);
 735         if (!tty)
 736                 return;
 737         if ((priv->line_status ^ prev_line_status) & UART_DCD)
 738                 usb_serial_handle_dcd_change(port, tty,
 739                                 priv->line_status & UART_DCD);
 740         tty_kref_put(tty);
 741 }
 742
 743 static void pl2303_read_int_callback(struct urb *urb)
 744 {
 745         struct usb_serial_port *port =  urb->context;
 746         unsigned char *data = urb->transfer_buffer;
 747         unsigned int actual_length = urb->actual_length;
 748         int status = urb->status;
 749         int retval;
 750
 751         switch (status) {
 752         case 0:
 753                 /* success */
 754                 break;
 755         case -ECONNRESET:
 756         case -ENOENT:
 757         case -ESHUTDOWN:
 758                 /* this urb is terminated, clean up */
 759                 dev_dbg(&port->dev, "%s - urb shutting down with status: %d\n",
 760                         __func__, status);
 761                 return;
 762         default:
 763                 dev_dbg(&port->dev, "%s - nonzero urb status received: %d\n",
 764                         __func__, status);
 765                 goto exit;
 766         }
 767
 768         usb_serial_debug_data(&port->dev, __func__,
 769                               urb->actual_length, urb->transfer_buffer);
 770
 771         pl2303_update_line_status(port, data, actual_length);
 772
 773 exit:
 774         retval = usb_submit_urb(urb, GFP_ATOMIC);
 775         if (retval)
 776                 dev_err(&port->dev,
 777                         "%s - usb_submit_urb failed with result %d\n",
 778                         __func__, retval);
 779 }
 780
 781 static void pl2303_process_read_urb(struct urb *urb)
 782 {
 783         struct usb_serial_port *port = urb->context;
 784         struct pl2303_private *priv = usb_get_serial_port_data(port);
 785         unsigned char *data = urb->transfer_buffer;
 786         char tty_flag = TTY_NORMAL;
 787         unsigned long flags;
 788         u8 line_status;
 789         int i;
 790
 791         /* update line status */
 792         spin_lock_irqsave(&priv->lock, flags);
 793         line_status = priv->line_status;
 794         priv->line_status &= ~UART_STATE_TRANSIENT_MASK;
 795         spin_unlock_irqrestore(&priv->lock, flags);
 796         wake_up_interruptible(&port->port.delta_msr_wait);
 797
 798         if (!urb->actual_length)
 799                 return;
 800
 801         /* break takes precedence over parity, */
 802         /* which takes precedence over framing errors */
 803         if (line_status & UART_BREAK_ERROR)
 804                 tty_flag = TTY_BREAK;
 805         else if (line_status & UART_PARITY_ERROR)
 806                 tty_flag = TTY_PARITY;
 807         else if (line_status & UART_FRAME_ERROR)
 808                 tty_flag = TTY_FRAME;
 809         dev_dbg(&port->dev, "%s - tty_flag = %d\n", __func__, tty_flag);
 810
 811         /* overrun is special, not associated with a char */
 812         if (line_status & UART_OVERRUN_ERROR)
 813                 tty_insert_flip_char(&port->port, 0, TTY_OVERRUN);
 814
 815         if (port->port.console && port->sysrq) {
 816                 for (i = 0; i < urb->actual_length; ++i)
 817                         if (!usb_serial_handle_sysrq_char(port, data[i]))
 818                                 tty_insert_flip_char(&port->port, data[i],
 819                                                 tty_flag);
 820         } else {
 821                 tty_insert_flip_string_fixed_flag(&port->port, data, tty_flag,
 822                                                         urb->actual_length);
 823         }
 824
 825         tty_flip_buffer_push(&port->port);
 826 }
 827
 828 /* All of the device info needed for the PL2303 SIO serial converter */
 829 static struct usb_serial_driver pl2303_device = {
 830         .driver = {
 831                 .owner =        THIS_MODULE,
 832                 .name =         "pl2303",
 833         },
 834         .id_table =             id_table,
 835         .num_ports =            1,
 836         .bulk_in_size =         256,
 837         .bulk_out_size =        256,
 838         .open =                 pl2303_open,
 839         .close =                pl2303_close,
 840         .dtr_rts =              pl2303_dtr_rts,
 841         .carrier_raised =       pl2303_carrier_raised,
 842         .ioctl =                pl2303_ioctl,
 843         .break_ctl =            pl2303_break_ctl,
 844         .set_termios =          pl2303_set_termios,
 845         .tiocmget =             pl2303_tiocmget,
 846         .tiocmset =             pl2303_tiocmset,
 847         .tiocmiwait =           pl2303_tiocmiwait,
 848         .process_read_urb =     pl2303_process_read_urb,
 849         .read_int_callback =    pl2303_read_int_callback,
 850         .attach =               pl2303_startup,
 851         .release =              pl2303_release,
 852         .port_probe =           pl2303_port_probe,
 853         .port_remove =          pl2303_port_remove,
 854 };
 855
 856 static struct usb_serial_driver * const serial_drivers[] = {
 857         &pl2303_device, NULL
 858 };
 859
 860 module_usb_serial_driver(serial_drivers, id_table);
 861
 862 MODULE_DESCRIPTION(DRIVER_DESC);
 863 MODULE_LICENSE("GPL");