Pileus Git - ~andy/linux/blob - 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 <asm/unaligned.h>
  33 #include "pl2303.h"
  34
  35 /*
  36  * Version Information
  37  */
  38 #define DRIVER_DESC "Prolific PL2303 USB to serial adaptor driver"
  39
  40 static const struct usb_device_id id_table[] = {
  41         { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID) },
  42         { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_RSAQ2) },
  43         { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_DCU11) },
  44         { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_RSAQ3) },
  45         { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_PHAROS) },
  46         { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_ALDIGA) },
  47         { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_MMX) },
  48         { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_GPRS) },
  49         { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_HCR331) },
  50         { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_MOTOROLA) },
  51         { USB_DEVICE(IODATA_VENDOR_ID, IODATA_PRODUCT_ID) },
  52         { USB_DEVICE(IODATA_VENDOR_ID, IODATA_PRODUCT_ID_RSAQ5) },
  53         { USB_DEVICE(ATEN_VENDOR_ID, ATEN_PRODUCT_ID) },
  54         { USB_DEVICE(ATEN_VENDOR_ID2, ATEN_PRODUCT_ID) },
  55         { USB_DEVICE(ELCOM_VENDOR_ID, ELCOM_PRODUCT_ID) },
  56         { USB_DEVICE(ELCOM_VENDOR_ID, ELCOM_PRODUCT_ID_UCSGT) },
  57         { USB_DEVICE(ITEGNO_VENDOR_ID, ITEGNO_PRODUCT_ID) },
  58         { USB_DEVICE(ITEGNO_VENDOR_ID, ITEGNO_PRODUCT_ID_2080) },
  59         { USB_DEVICE(MA620_VENDOR_ID, MA620_PRODUCT_ID) },
  60         { USB_DEVICE(RATOC_VENDOR_ID, RATOC_PRODUCT_ID) },
  61         { USB_DEVICE(TRIPP_VENDOR_ID, TRIPP_PRODUCT_ID) },
  62         { USB_DEVICE(RADIOSHACK_VENDOR_ID, RADIOSHACK_PRODUCT_ID) },
  63         { USB_DEVICE(DCU10_VENDOR_ID, DCU10_PRODUCT_ID) },
  64         { USB_DEVICE(SITECOM_VENDOR_ID, SITECOM_PRODUCT_ID) },
  65         { USB_DEVICE(ALCATEL_VENDOR_ID, ALCATEL_PRODUCT_ID) },
  66         { USB_DEVICE(SAMSUNG_VENDOR_ID, SAMSUNG_PRODUCT_ID) },
  67         { USB_DEVICE(SIEMENS_VENDOR_ID, SIEMENS_PRODUCT_ID_SX1) },
  68         { USB_DEVICE(SIEMENS_VENDOR_ID, SIEMENS_PRODUCT_ID_X65) },
  69         { USB_DEVICE(SIEMENS_VENDOR_ID, SIEMENS_PRODUCT_ID_X75) },
  70         { USB_DEVICE(SIEMENS_VENDOR_ID, SIEMENS_PRODUCT_ID_EF81) },
  71         { USB_DEVICE(BENQ_VENDOR_ID, BENQ_PRODUCT_ID_S81) }, /* Benq/Siemens S81 */
  72         { USB_DEVICE(SYNTECH_VENDOR_ID, SYNTECH_PRODUCT_ID) },
  73         { USB_DEVICE(NOKIA_CA42_VENDOR_ID, NOKIA_CA42_PRODUCT_ID) },
  74         { USB_DEVICE(CA_42_CA42_VENDOR_ID, CA_42_CA42_PRODUCT_ID) },
  75         { USB_DEVICE(SAGEM_VENDOR_ID, SAGEM_PRODUCT_ID) },
  76         { USB_DEVICE(LEADTEK_VENDOR_ID, LEADTEK_9531_PRODUCT_ID) },
  77         { USB_DEVICE(SPEEDDRAGON_VENDOR_ID, SPEEDDRAGON_PRODUCT_ID) },
  78         { USB_DEVICE(DATAPILOT_U2_VENDOR_ID, DATAPILOT_U2_PRODUCT_ID) },
  79         { USB_DEVICE(BELKIN_VENDOR_ID, BELKIN_PRODUCT_ID) },
  80         { USB_DEVICE(ALCOR_VENDOR_ID, ALCOR_PRODUCT_ID) },
  81         { USB_DEVICE(WS002IN_VENDOR_ID, WS002IN_PRODUCT_ID) },
  82         { USB_DEVICE(COREGA_VENDOR_ID, COREGA_PRODUCT_ID) },
  83         { USB_DEVICE(YCCABLE_VENDOR_ID, YCCABLE_PRODUCT_ID) },
  84         { USB_DEVICE(SUPERIAL_VENDOR_ID, SUPERIAL_PRODUCT_ID) },
  85         { USB_DEVICE(HP_VENDOR_ID, HP_LD220_PRODUCT_ID) },
  86         { USB_DEVICE(CRESSI_VENDOR_ID, CRESSI_EDY_PRODUCT_ID) },
  87         { USB_DEVICE(ZEAGLE_VENDOR_ID, ZEAGLE_N2ITION3_PRODUCT_ID) },
  88         { USB_DEVICE(SONY_VENDOR_ID, SONY_QN3USB_PRODUCT_ID) },
  89         { USB_DEVICE(SANWA_VENDOR_ID, SANWA_PRODUCT_ID) },
  90         { USB_DEVICE(ADLINK_VENDOR_ID, ADLINK_ND6530_PRODUCT_ID) },
  91         { USB_DEVICE(SMART_VENDOR_ID, SMART_PRODUCT_ID) },
  92         { }                                     /* Terminating entry */
  93 };
  94
  95 MODULE_DEVICE_TABLE(usb, id_table);
  96
  97 #define SET_LINE_REQUEST_TYPE           0x21
  98 #define SET_LINE_REQUEST                0x20
  99
 100 #define SET_CONTROL_REQUEST_TYPE        0x21
 101 #define SET_CONTROL_REQUEST             0x22
 102 #define CONTROL_DTR                     0x01
 103 #define CONTROL_RTS                     0x02
 104
 105 #define BREAK_REQUEST_TYPE              0x21
 106 #define BREAK_REQUEST                   0x23
 107 #define BREAK_ON                        0xffff
 108 #define BREAK_OFF                       0x0000
 109
 110 #define GET_LINE_REQUEST_TYPE           0xa1
 111 #define GET_LINE_REQUEST                0x21
 112
 113 #define VENDOR_WRITE_REQUEST_TYPE       0x40
 114 #define VENDOR_WRITE_REQUEST            0x01
 115
 116 #define VENDOR_READ_REQUEST_TYPE        0xc0
 117 #define VENDOR_READ_REQUEST             0x01
 118
 119 #define UART_STATE                      0x08
 120 #define UART_STATE_TRANSIENT_MASK       0x74
 121 #define UART_DCD                        0x01
 122 #define UART_DSR                        0x02
 123 #define UART_BREAK_ERROR                0x04
 124 #define UART_RING                       0x08
 125 #define UART_FRAME_ERROR                0x10
 126 #define UART_PARITY_ERROR               0x20
 127 #define UART_OVERRUN_ERROR              0x40
 128 #define UART_CTS                        0x80
 129
 130
 131 enum pl2303_type {
 132         type_0,         /* don't know the difference between type 0 and */
 133         type_1,         /* type 1, until someone from prolific tells us... */
 134         HX,             /* HX version of the pl2303 chip */
 135 };
 136
 137 struct pl2303_serial_private {
 138         enum pl2303_type type;
 139 };
 140
 141 struct pl2303_private {
 142         spinlock_t lock;
 143         u8 line_control;
 144         u8 line_status;
 145
 146         u8 line_settings[7];
 147 };
 148
 149 static int pl2303_vendor_read(__u16 value, __u16 index,
 150                 struct usb_serial *serial, unsigned char *buf)
 151 {
 152         int res = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
 153                         VENDOR_READ_REQUEST, VENDOR_READ_REQUEST_TYPE,
 154                         value, index, buf, 1, 100);
 155         dev_dbg(&serial->interface->dev, "0x%x:0x%x:0x%x:0x%x  %d - %x\n",
 156                 VENDOR_READ_REQUEST_TYPE, VENDOR_READ_REQUEST, value, index,
 157                 res, buf[0]);
 158         return res;
 159 }
 160
 161 static int pl2303_vendor_write(__u16 value, __u16 index,
 162                 struct usb_serial *serial)
 163 {
 164         int res = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
 165                         VENDOR_WRITE_REQUEST, VENDOR_WRITE_REQUEST_TYPE,
 166                         value, index, NULL, 0, 100);
 167         dev_dbg(&serial->interface->dev, "0x%x:0x%x:0x%x:0x%x  %d\n",
 168                 VENDOR_WRITE_REQUEST_TYPE, VENDOR_WRITE_REQUEST, value, index,
 169                 res);
 170         return res;
 171 }
 172
 173 static int pl2303_startup(struct usb_serial *serial)
 174 {
 175         struct pl2303_serial_private *spriv;
 176         enum pl2303_type type = type_0;
 177         unsigned char *buf;
 178
 179         spriv = kzalloc(sizeof(*spriv), GFP_KERNEL);
 180         if (!spriv)
 181                 return -ENOMEM;
 182
 183         buf = kmalloc(10, GFP_KERNEL);
 184         if (!buf) {
 185                 kfree(spriv);
 186                 return -ENOMEM;
 187         }
 188
 189         if (serial->dev->descriptor.bDeviceClass == 0x02)
 190                 type = type_0;
 191         else if (serial->dev->descriptor.bMaxPacketSize0 == 0x40)
 192                 type = HX;
 193         else if (serial->dev->descriptor.bDeviceClass == 0x00)
 194                 type = type_1;
 195         else if (serial->dev->descriptor.bDeviceClass == 0xFF)
 196                 type = type_1;
 197         dev_dbg(&serial->interface->dev, "device type: %d\n", type);
 198
 199         spriv->type = type;
 200         usb_set_serial_data(serial, spriv);
 201
 202         pl2303_vendor_read(0x8484, 0, serial, buf);
 203         pl2303_vendor_write(0x0404, 0, serial);
 204         pl2303_vendor_read(0x8484, 0, serial, buf);
 205         pl2303_vendor_read(0x8383, 0, serial, buf);
 206         pl2303_vendor_read(0x8484, 0, serial, buf);
 207         pl2303_vendor_write(0x0404, 1, serial);
 208         pl2303_vendor_read(0x8484, 0, serial, buf);
 209         pl2303_vendor_read(0x8383, 0, serial, buf);
 210         pl2303_vendor_write(0, 1, serial);
 211         pl2303_vendor_write(1, 0, serial);
 212         if (type == HX)
 213                 pl2303_vendor_write(2, 0x44, serial);
 214         else
 215                 pl2303_vendor_write(2, 0x24, serial);
 216
 217         kfree(buf);
 218         return 0;
 219 }
 220
 221 static void pl2303_release(struct usb_serial *serial)
 222 {
 223         struct pl2303_serial_private *spriv;
 224
 225         spriv = usb_get_serial_data(serial);
 226         kfree(spriv);
 227 }
 228
 229 static int pl2303_port_probe(struct usb_serial_port *port)
 230 {
 231         struct pl2303_private *priv;
 232
 233         priv = kzalloc(sizeof(*priv), GFP_KERNEL);
 234         if (!priv)
 235                 return -ENOMEM;
 236
 237         spin_lock_init(&priv->lock);
 238
 239         usb_set_serial_port_data(port, priv);
 240
 241         port->port.drain_delay = 256;
 242
 243         return 0;
 244 }
 245
 246 static int pl2303_port_remove(struct usb_serial_port *port)
 247 {
 248         struct pl2303_private *priv;
 249
 250         priv = usb_get_serial_port_data(port);
 251         kfree(priv);
 252
 253         return 0;
 254 }
 255
 256 static int pl2303_set_control_lines(struct usb_serial_port *port, u8 value)
 257 {
 258         struct usb_device *dev = port->serial->dev;
 259         int retval;
 260
 261         retval = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
 262                                  SET_CONTROL_REQUEST, SET_CONTROL_REQUEST_TYPE,
 263                                  value, 0, NULL, 0, 100);
 264         dev_dbg(&port->dev, "%s - value = %d, retval = %d\n", __func__,
 265                 value, retval);
 266         return retval;
 267 }
 268
 269 static void pl2303_encode_baudrate(struct tty_struct *tty,
 270                                         struct usb_serial_port *port,
 271                                         u8 buf[4])
 272 {
 273         const int baud_sup[] = { 75, 150, 300, 600, 1200, 1800, 2400, 3600,
 274                                  4800, 7200, 9600, 14400, 19200, 28800, 38400,
 275                                  57600, 115200, 230400, 460800, 500000, 614400,
 276                                  921600, 1228800, 2457600, 3000000, 6000000 };
 277
 278         struct usb_serial *serial = port->serial;
 279         struct pl2303_serial_private *spriv = usb_get_serial_data(serial);
 280         int baud;
 281         int i;
 282
 283         /*
 284          * NOTE: Only the values defined in baud_sup are supported!
 285          *       => if unsupported values are set, the PL2303 seems to use
 286          *          9600 baud (at least my PL2303X always does)
 287          */
 288         baud = tty_get_baud_rate(tty);
 289         dev_dbg(&port->dev, "baud requested = %d\n", baud);
 290         if (!baud)
 291                 return;
 292
 293         /* Set baudrate to nearest supported value */
 294         for (i = 0; i < ARRAY_SIZE(baud_sup); ++i) {
 295                 if (baud_sup[i] > baud)
 296                         break;
 297         }
 298
 299         if (i == ARRAY_SIZE(baud_sup))
 300                 baud = baud_sup[i - 1];
 301         else if (i > 0 && (baud_sup[i] - baud) > (baud - baud_sup[i - 1]))
 302                 baud = baud_sup[i - 1];
 303         else
 304                 baud = baud_sup[i];
 305
 306         /* type_0, type_1 only support up to 1228800 baud */
 307         if (spriv->type != HX)
 308                 baud = min_t(int, baud, 1228800);
 309
 310         if (baud <= 115200) {
 311                 put_unaligned_le32(baud, buf);
 312         } else {
 313                 /*
 314                  * Apparently the formula for higher speeds is:
 315                  * baudrate = 12M * 32 / (2^buf[1]) / buf[0]
 316                  */
 317                 unsigned tmp = 12000000 * 32 / baud;
 318                 buf[3] = 0x80;
 319                 buf[2] = 0;
 320                 buf[1] = (tmp >= 256);
 321                 while (tmp >= 256) {
 322                         tmp >>= 2;
 323                         buf[1] <<= 1;
 324                 }
 325                 buf[0] = tmp;
 326         }
 327
 328         /* Save resulting baud rate */
 329         tty_encode_baud_rate(tty, baud, baud);
 330         dev_dbg(&port->dev, "baud set = %d\n", baud);
 331 }
 332
 333 static void pl2303_set_termios(struct tty_struct *tty,
 334                 struct usb_serial_port *port, struct ktermios *old_termios)
 335 {
 336         struct usb_serial *serial = port->serial;
 337         struct pl2303_serial_private *spriv = usb_get_serial_data(serial);
 338         struct pl2303_private *priv = usb_get_serial_port_data(port);
 339         unsigned long flags;
 340         unsigned char *buf;
 341         int i;
 342         u8 control;
 343
 344         if (old_termios && !tty_termios_hw_change(&tty->termios, old_termios))
 345                 return;
 346
 347         buf = kzalloc(7, GFP_KERNEL);
 348         if (!buf) {
 349                 dev_err(&port->dev, "%s - out of memory.\n", __func__);
 350                 /* Report back no change occurred */
 351                 if (old_termios)
 352                         tty->termios = *old_termios;
 353                 return;
 354         }
 355
 356         i = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
 357                             GET_LINE_REQUEST, GET_LINE_REQUEST_TYPE,
 358                             0, 0, buf, 7, 100);
 359         dev_dbg(&port->dev, "0xa1:0x21:0:0  %d - %7ph\n", i, buf);
 360
 361         switch (C_CSIZE(tty)) {
 362         case CS5:
 363                 buf[6] = 5;
 364                 break;
 365         case CS6:
 366                 buf[6] = 6;
 367                 break;
 368         case CS7:
 369                 buf[6] = 7;
 370                 break;
 371         default:
 372         case CS8:
 373                 buf[6] = 8;
 374         }
 375         dev_dbg(&port->dev, "data bits = %d\n", buf[6]);
 376
 377         /* For reference buf[0]:buf[3] baud rate value */
 378         pl2303_encode_baudrate(tty, port, &buf[0]);
 379
 380         /* For reference buf[4]=0 is 1 stop bits */
 381         /* For reference buf[4]=1 is 1.5 stop bits */
 382         /* For reference buf[4]=2 is 2 stop bits */
 383         if (C_CSTOPB(tty)) {
 384                 /*
 385                  * NOTE: Comply with "real" UARTs / RS232:
 386                  *       use 1.5 instead of 2 stop bits with 5 data bits
 387                  */
 388                 if (C_CSIZE(tty) == CS5) {
 389                         buf[4] = 1;
 390                         dev_dbg(&port->dev, "stop bits = 1.5\n");
 391                 } else {
 392                         buf[4] = 2;
 393                         dev_dbg(&port->dev, "stop bits = 2\n");
 394                 }
 395         } else {
 396                 buf[4] = 0;
 397                 dev_dbg(&port->dev, "stop bits = 1\n");
 398         }
 399
 400         if (C_PARENB(tty)) {
 401                 /* For reference buf[5]=0 is none parity */
 402                 /* For reference buf[5]=1 is odd parity */
 403                 /* For reference buf[5]=2 is even parity */
 404                 /* For reference buf[5]=3 is mark parity */
 405                 /* For reference buf[5]=4 is space parity */
 406                 if (C_PARODD(tty)) {
 407                         if (tty->termios.c_cflag & CMSPAR) {
 408                                 buf[5] = 3;
 409                                 dev_dbg(&port->dev, "parity = mark\n");
 410                         } else {
 411                                 buf[5] = 1;
 412                                 dev_dbg(&port->dev, "parity = odd\n");
 413                         }
 414                 } else {
 415                         if (tty->termios.c_cflag & CMSPAR) {
 416                                 buf[5] = 4;
 417                                 dev_dbg(&port->dev, "parity = space\n");
 418                         } else {
 419                                 buf[5] = 2;
 420                                 dev_dbg(&port->dev, "parity = even\n");
 421                         }
 422                 }
 423         } else {
 424                 buf[5] = 0;
 425                 dev_dbg(&port->dev, "parity = none\n");
 426         }
 427
 428         /*
 429          * Some PL2303 are known to lose bytes if you change serial settings
 430          * even to the same values as before. Thus we actually need to filter
 431          * in this specific case.
 432          *
 433          * Note that the tty_termios_hw_change check above is not sufficient
 434          * as a previously requested baud rate may differ from the one
 435          * actually used (and stored in old_termios).
 436          *
 437          * NOTE: No additional locking needed for line_settings as it is
 438          *       only used in set_termios, which is serialised against itself.
 439          */
 440         if (!old_termios || memcmp(buf, priv->line_settings, 7)) {
 441                 i = usb_control_msg(serial->dev,
 442                                     usb_sndctrlpipe(serial->dev, 0),
 443                                     SET_LINE_REQUEST, SET_LINE_REQUEST_TYPE,
 444                                     0, 0, buf, 7, 100);
 445
 446                 dev_dbg(&port->dev, "0x21:0x20:0:0  %d\n", i);
 447
 448                 if (i == 7)
 449                         memcpy(priv->line_settings, buf, 7);
 450         }
 451
 452         /* change control lines if we are switching to or from B0 */
 453         spin_lock_irqsave(&priv->lock, flags);
 454         control = priv->line_control;
 455         if (C_BAUD(tty) == B0)
 456                 priv->line_control &= ~(CONTROL_DTR | CONTROL_RTS);
 457         else if (old_termios && (old_termios->c_cflag & CBAUD) == B0)
 458                 priv->line_control |= (CONTROL_DTR | CONTROL_RTS);
 459         if (control != priv->line_control) {
 460                 control = priv->line_control;
 461                 spin_unlock_irqrestore(&priv->lock, flags);
 462                 pl2303_set_control_lines(port, control);
 463         } else {
 464                 spin_unlock_irqrestore(&priv->lock, flags);
 465         }
 466
 467         memset(buf, 0, 7);
 468         i = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
 469                             GET_LINE_REQUEST, GET_LINE_REQUEST_TYPE,
 470                             0, 0, buf, 7, 100);
 471         dev_dbg(&port->dev, "0xa1:0x21:0:0  %d - %7ph\n", i, buf);
 472
 473         if (C_CRTSCTS(tty)) {
 474                 if (spriv->type == HX)
 475                         pl2303_vendor_write(0x0, 0x61, serial);
 476                 else
 477                         pl2303_vendor_write(0x0, 0x41, serial);
 478         } else {
 479                 pl2303_vendor_write(0x0, 0x0, serial);
 480         }
 481
 482         kfree(buf);
 483 }
 484
 485 static void pl2303_dtr_rts(struct usb_serial_port *port, int on)
 486 {
 487         struct pl2303_private *priv = usb_get_serial_port_data(port);
 488         unsigned long flags;
 489         u8 control;
 490
 491         spin_lock_irqsave(&priv->lock, flags);
 492         /* Change DTR and RTS */
 493         if (on)
 494                 priv->line_control |= (CONTROL_DTR | CONTROL_RTS);
 495         else
 496                 priv->line_control &= ~(CONTROL_DTR | CONTROL_RTS);
 497         control = priv->line_control;
 498         spin_unlock_irqrestore(&priv->lock, flags);
 499         pl2303_set_control_lines(port, control);
 500 }
 501
 502 static void pl2303_close(struct usb_serial_port *port)
 503 {
 504         usb_serial_generic_close(port);
 505         usb_kill_urb(port->interrupt_in_urb);
 506 }
 507
 508 static int pl2303_open(struct tty_struct *tty, struct usb_serial_port *port)
 509 {
 510         struct usb_serial *serial = port->serial;
 511         struct pl2303_serial_private *spriv = usb_get_serial_data(serial);
 512         int result;
 513
 514         if (spriv->type != HX) {
 515                 usb_clear_halt(serial->dev, port->write_urb->pipe);
 516                 usb_clear_halt(serial->dev, port->read_urb->pipe);
 517         } else {
 518                 /* reset upstream data pipes */
 519                 pl2303_vendor_write(8, 0, serial);
 520                 pl2303_vendor_write(9, 0, serial);
 521         }
 522
 523         /* Setup termios */
 524         if (tty)
 525                 pl2303_set_termios(tty, port, NULL);
 526
 527         result = usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL);
 528         if (result) {
 529                 dev_err(&port->dev, "%s - failed submitting interrupt urb,"
 530                         " error %d\n", __func__, result);
 531                 return result;
 532         }
 533
 534         result = usb_serial_generic_open(tty, port);
 535         if (result) {
 536                 usb_kill_urb(port->interrupt_in_urb);
 537                 return result;
 538         }
 539
 540         return 0;
 541 }
 542
 543 static int pl2303_tiocmset(struct tty_struct *tty,
 544                            unsigned int set, unsigned int clear)
 545 {
 546         struct usb_serial_port *port = tty->driver_data;
 547         struct pl2303_private *priv = usb_get_serial_port_data(port);
 548         unsigned long flags;
 549         u8 control;
 550         int ret;
 551
 552         spin_lock_irqsave(&priv->lock, flags);
 553         if (set & TIOCM_RTS)
 554                 priv->line_control |= CONTROL_RTS;
 555         if (set & TIOCM_DTR)
 556                 priv->line_control |= CONTROL_DTR;
 557         if (clear & TIOCM_RTS)
 558                 priv->line_control &= ~CONTROL_RTS;
 559         if (clear & TIOCM_DTR)
 560                 priv->line_control &= ~CONTROL_DTR;
 561         control = priv->line_control;
 562         spin_unlock_irqrestore(&priv->lock, flags);
 563
 564         ret = pl2303_set_control_lines(port, control);
 565         if (ret)
 566                 return usb_translate_errors(ret);
 567
 568         return 0;
 569 }
 570
 571 static int pl2303_tiocmget(struct tty_struct *tty)
 572 {
 573         struct usb_serial_port *port = tty->driver_data;
 574         struct pl2303_private *priv = usb_get_serial_port_data(port);
 575         unsigned long flags;
 576         unsigned int mcr;
 577         unsigned int status;
 578         unsigned int result;
 579
 580         spin_lock_irqsave(&priv->lock, flags);
 581         mcr = priv->line_control;
 582         status = priv->line_status;
 583         spin_unlock_irqrestore(&priv->lock, flags);
 584
 585         result = ((mcr & CONTROL_DTR)           ? TIOCM_DTR : 0)
 586                   | ((mcr & CONTROL_RTS)        ? TIOCM_RTS : 0)
 587                   | ((status & UART_CTS)        ? TIOCM_CTS : 0)
 588                   | ((status & UART_DSR)        ? TIOCM_DSR : 0)
 589                   | ((status & UART_RING)       ? TIOCM_RI  : 0)
 590                   | ((status & UART_DCD)        ? TIOCM_CD  : 0);
 591
 592         dev_dbg(&port->dev, "%s - result = %x\n", __func__, result);
 593
 594         return result;
 595 }
 596
 597 static int pl2303_carrier_raised(struct usb_serial_port *port)
 598 {
 599         struct pl2303_private *priv = usb_get_serial_port_data(port);
 600         if (priv->line_status & UART_DCD)
 601                 return 1;
 602         return 0;
 603 }
 604
 605 static int pl2303_tiocmiwait(struct tty_struct *tty, unsigned long arg)
 606 {
 607         struct usb_serial_port *port = tty->driver_data;
 608         struct pl2303_private *priv = usb_get_serial_port_data(port);
 609         unsigned long flags;
 610         unsigned int prevstatus;
 611         unsigned int status;
 612         unsigned int changed;
 613
 614         spin_lock_irqsave(&priv->lock, flags);
 615         prevstatus = priv->line_status;
 616         spin_unlock_irqrestore(&priv->lock, flags);
 617
 618         while (1) {
 619                 interruptible_sleep_on(&port->port.delta_msr_wait);
 620                 /* see if a signal did it */
 621                 if (signal_pending(current))
 622                         return -ERESTARTSYS;
 623
 624                 if (port->serial->disconnected)
 625                         return -EIO;
 626
 627                 spin_lock_irqsave(&priv->lock, flags);
 628                 status = priv->line_status;
 629                 spin_unlock_irqrestore(&priv->lock, flags);
 630
 631                 changed = prevstatus ^ status;
 632
 633                 if (((arg & TIOCM_RNG) && (changed & UART_RING)) ||
 634                     ((arg & TIOCM_DSR) && (changed & UART_DSR)) ||
 635                     ((arg & TIOCM_CD)  && (changed & UART_DCD)) ||
 636                     ((arg & TIOCM_CTS) && (changed & UART_CTS))) {
 637                         return 0;
 638                 }
 639                 prevstatus = status;
 640         }
 641         /* NOTREACHED */
 642         return 0;
 643 }
 644
 645 static int pl2303_ioctl(struct tty_struct *tty,
 646                         unsigned int cmd, unsigned long arg)
 647 {
 648         struct serial_struct ser;
 649         struct usb_serial_port *port = tty->driver_data;
 650
 651         dev_dbg(&port->dev, "%s cmd = 0x%04x\n", __func__, cmd);
 652
 653         switch (cmd) {
 654         case TIOCGSERIAL:
 655                 memset(&ser, 0, sizeof ser);
 656                 ser.type = PORT_16654;
 657                 ser.line = port->minor;
 658                 ser.port = port->port_number;
 659                 ser.baud_base = 460800;
 660
 661                 if (copy_to_user((void __user *)arg, &ser, sizeof ser))
 662                         return -EFAULT;
 663
 664                 return 0;
 665         default:
 666                 dev_dbg(&port->dev, "%s not supported = 0x%04x\n", __func__, cmd);
 667                 break;
 668         }
 669         return -ENOIOCTLCMD;
 670 }
 671
 672 static void pl2303_break_ctl(struct tty_struct *tty, int break_state)
 673 {
 674         struct usb_serial_port *port = tty->driver_data;
 675         struct usb_serial *serial = port->serial;
 676         u16 state;
 677         int result;
 678
 679         if (break_state == 0)
 680                 state = BREAK_OFF;
 681         else
 682                 state = BREAK_ON;
 683         dev_dbg(&port->dev, "%s - turning break %s\n", __func__,
 684                         state == BREAK_OFF ? "off" : "on");
 685
 686         result = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
 687                                  BREAK_REQUEST, BREAK_REQUEST_TYPE, state,
 688                                  0, NULL, 0, 100);
 689         if (result)
 690                 dev_err(&port->dev, "error sending break = %d\n", result);
 691 }
 692
 693 static void pl2303_update_line_status(struct usb_serial_port *port,
 694                                       unsigned char *data,
 695                                       unsigned int actual_length)
 696 {
 697
 698         struct pl2303_private *priv = usb_get_serial_port_data(port);
 699         struct tty_struct *tty;
 700         unsigned long flags;
 701         u8 status_idx = UART_STATE;
 702         u8 length = UART_STATE + 1;
 703         u8 prev_line_status;
 704         u16 idv, idp;
 705
 706         idv = le16_to_cpu(port->serial->dev->descriptor.idVendor);
 707         idp = le16_to_cpu(port->serial->dev->descriptor.idProduct);
 708
 709
 710         if (idv == SIEMENS_VENDOR_ID) {
 711                 if (idp == SIEMENS_PRODUCT_ID_X65 ||
 712                     idp == SIEMENS_PRODUCT_ID_SX1 ||
 713                     idp == SIEMENS_PRODUCT_ID_X75) {
 714
 715                         length = 1;
 716                         status_idx = 0;
 717                 }
 718         }
 719
 720         if (actual_length < length)
 721                 return;
 722
 723         /* Save off the uart status for others to look at */
 724         spin_lock_irqsave(&priv->lock, flags);
 725         prev_line_status = priv->line_status;
 726         priv->line_status = data[status_idx];
 727         spin_unlock_irqrestore(&priv->lock, flags);
 728         if (priv->line_status & UART_BREAK_ERROR)
 729                 usb_serial_handle_break(port);
 730         wake_up_interruptible(&port->port.delta_msr_wait);
 731
 732         tty = tty_port_tty_get(&port->port);
 733         if (!tty)
 734                 return;
 735         if ((priv->line_status ^ prev_line_status) & UART_DCD)
 736                 usb_serial_handle_dcd_change(port, tty,
 737                                 priv->line_status & UART_DCD);
 738         tty_kref_put(tty);
 739 }
 740
 741 static void pl2303_read_int_callback(struct urb *urb)
 742 {
 743         struct usb_serial_port *port =  urb->context;
 744         unsigned char *data = urb->transfer_buffer;
 745         unsigned int actual_length = urb->actual_length;
 746         int status = urb->status;
 747         int retval;
 748
 749         switch (status) {
 750         case 0:
 751                 /* success */
 752                 break;
 753         case -ECONNRESET:
 754         case -ENOENT:
 755         case -ESHUTDOWN:
 756                 /* this urb is terminated, clean up */
 757                 dev_dbg(&port->dev, "%s - urb shutting down with status: %d\n",
 758                         __func__, status);
 759                 return;
 760         default:
 761                 dev_dbg(&port->dev, "%s - nonzero urb status received: %d\n",
 762                         __func__, status);
 763                 goto exit;
 764         }
 765
 766         usb_serial_debug_data(&port->dev, __func__,
 767                               urb->actual_length, urb->transfer_buffer);
 768
 769         pl2303_update_line_status(port, data, actual_length);
 770
 771 exit:
 772         retval = usb_submit_urb(urb, GFP_ATOMIC);
 773         if (retval)
 774                 dev_err(&port->dev,
 775                         "%s - usb_submit_urb failed with result %d\n",
 776                         __func__, retval);
 777 }
 778
 779 static void pl2303_process_read_urb(struct urb *urb)
 780 {
 781         struct usb_serial_port *port = urb->context;
 782         struct pl2303_private *priv = usb_get_serial_port_data(port);
 783         unsigned char *data = urb->transfer_buffer;
 784         char tty_flag = TTY_NORMAL;
 785         unsigned long flags;
 786         u8 line_status;
 787         int i;
 788
 789         /* update line status */
 790         spin_lock_irqsave(&priv->lock, flags);
 791         line_status = priv->line_status;
 792         priv->line_status &= ~UART_STATE_TRANSIENT_MASK;
 793         spin_unlock_irqrestore(&priv->lock, flags);
 794         wake_up_interruptible(&port->port.delta_msr_wait);
 795
 796         if (!urb->actual_length)
 797                 return;
 798
 799         /* break takes precedence over parity, */
 800         /* which takes precedence over framing errors */
 801         if (line_status & UART_BREAK_ERROR)
 802                 tty_flag = TTY_BREAK;
 803         else if (line_status & UART_PARITY_ERROR)
 804                 tty_flag = TTY_PARITY;
 805         else if (line_status & UART_FRAME_ERROR)
 806                 tty_flag = TTY_FRAME;
 807
 808         if (tty_flag != TTY_NORMAL)
 809                 dev_dbg(&port->dev, "%s - tty_flag = %d\n", __func__,
 810                                                                 tty_flag);
 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");