drivers/usb/serial/pl2303.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * Prolific PL2303 USB to serial adaptor driver
   4  *
   5  * Copyright (C) 2001-2007 Greg Kroah-Hartman ([email protected])
   6  * Copyright (C) 2003 IBM Corp.
   7  *
   8  * Original driver for 2.2.x by anonymous
   9  *
  10  * See Documentation/usb/usb-serial.rst for more information on using this
  11  * driver
  12  */
  13
  14 #include <linux/kernel.h>
  15 #include <linux/errno.h>
  16 #include <linux/slab.h>
  17 #include <linux/tty.h>
  18 #include <linux/tty_driver.h>
  19 #include <linux/tty_flip.h>
  20 #include <linux/serial.h>
  21 #include <linux/module.h>
  22 #include <linux/moduleparam.h>
  23 #include <linux/spinlock.h>
  24 #include <linux/uaccess.h>
  25 #include <linux/usb.h>
  26 #include <linux/usb/serial.h>
  27 #include <asm/unaligned.h>
  28 #include "pl2303.h"
  29
  30
  31 #define PL2303_QUIRK_UART_STATE_IDX0            BIT(0)
  32 #define PL2303_QUIRK_LEGACY                     BIT(1)
  33 #define PL2303_QUIRK_ENDPOINT_HACK              BIT(2)
  34
  35 static const struct usb_device_id id_table[] = {
  36         { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID),
  37                 .driver_info = PL2303_QUIRK_ENDPOINT_HACK },
  38         { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_RSAQ2) },
  39         { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_DCU11) },
  40         { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_RSAQ3) },
  41         { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_CHILITAG) },
  42         { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_PHAROS) },
  43         { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_ALDIGA) },
  44         { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_MMX) },
  45         { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_GPRS) },
  46         { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_HCR331) },
  47         { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_MOTOROLA) },
  48         { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_ZTEK) },
  49         { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_TB) },
  50         { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_GC) },
  51         { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_GB) },
  52         { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_GT) },
  53         { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_GL) },
  54         { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_GE) },
  55         { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_GS) },
  56         { USB_DEVICE(IODATA_VENDOR_ID, IODATA_PRODUCT_ID) },
  57         { USB_DEVICE(IODATA_VENDOR_ID, IODATA_PRODUCT_ID_RSAQ5) },
  58         { USB_DEVICE(ATEN_VENDOR_ID, ATEN_PRODUCT_ID),
  59                 .driver_info = PL2303_QUIRK_ENDPOINT_HACK },
  60         { USB_DEVICE(ATEN_VENDOR_ID, ATEN_PRODUCT_UC485),
  61                 .driver_info = PL2303_QUIRK_ENDPOINT_HACK },
  62         { USB_DEVICE(ATEN_VENDOR_ID, ATEN_PRODUCT_UC232B),
  63                 .driver_info = PL2303_QUIRK_ENDPOINT_HACK },
  64         { USB_DEVICE(ATEN_VENDOR_ID, ATEN_PRODUCT_ID2) },
  65         { USB_DEVICE(ATEN_VENDOR_ID2, ATEN_PRODUCT_ID) },
  66         { USB_DEVICE(ELCOM_VENDOR_ID, ELCOM_PRODUCT_ID) },
  67         { USB_DEVICE(ELCOM_VENDOR_ID, ELCOM_PRODUCT_ID_UCSGT) },
  68         { USB_DEVICE(ITEGNO_VENDOR_ID, ITEGNO_PRODUCT_ID) },
  69         { USB_DEVICE(ITEGNO_VENDOR_ID, ITEGNO_PRODUCT_ID_2080) },
  70         { USB_DEVICE(MA620_VENDOR_ID, MA620_PRODUCT_ID) },
  71         { USB_DEVICE(RATOC_VENDOR_ID, RATOC_PRODUCT_ID) },
  72         { USB_DEVICE(TRIPP_VENDOR_ID, TRIPP_PRODUCT_ID) },
  73         { USB_DEVICE(RADIOSHACK_VENDOR_ID, RADIOSHACK_PRODUCT_ID) },
  74         { USB_DEVICE(DCU10_VENDOR_ID, DCU10_PRODUCT_ID) },
  75         { USB_DEVICE(SITECOM_VENDOR_ID, SITECOM_PRODUCT_ID) },
  76         { USB_DEVICE(ALCATEL_VENDOR_ID, ALCATEL_PRODUCT_ID) },
  77         { USB_DEVICE(SIEMENS_VENDOR_ID, SIEMENS_PRODUCT_ID_SX1),
  78                 .driver_info = PL2303_QUIRK_UART_STATE_IDX0 },
  79         { USB_DEVICE(SIEMENS_VENDOR_ID, SIEMENS_PRODUCT_ID_X65),
  80                 .driver_info = PL2303_QUIRK_UART_STATE_IDX0 },
  81         { USB_DEVICE(SIEMENS_VENDOR_ID, SIEMENS_PRODUCT_ID_X75),
  82                 .driver_info = PL2303_QUIRK_UART_STATE_IDX0 },
  83         { USB_DEVICE(SIEMENS_VENDOR_ID, SIEMENS_PRODUCT_ID_EF81),
  84                 .driver_info = PL2303_QUIRK_ENDPOINT_HACK },
  85         { USB_DEVICE(BENQ_VENDOR_ID, BENQ_PRODUCT_ID_S81) }, /* Benq/Siemens S81 */
  86         { USB_DEVICE(SYNTECH_VENDOR_ID, SYNTECH_PRODUCT_ID) },
  87         { USB_DEVICE(NOKIA_CA42_VENDOR_ID, NOKIA_CA42_PRODUCT_ID) },
  88         { USB_DEVICE(CA_42_CA42_VENDOR_ID, CA_42_CA42_PRODUCT_ID) },
  89         { USB_DEVICE(SAGEM_VENDOR_ID, SAGEM_PRODUCT_ID) },
  90         { USB_DEVICE(LEADTEK_VENDOR_ID, LEADTEK_9531_PRODUCT_ID) },
  91         { USB_DEVICE(SPEEDDRAGON_VENDOR_ID, SPEEDDRAGON_PRODUCT_ID) },
  92         { USB_DEVICE(DATAPILOT_U2_VENDOR_ID, DATAPILOT_U2_PRODUCT_ID) },
  93         { USB_DEVICE(BELKIN_VENDOR_ID, BELKIN_PRODUCT_ID) },
  94         { USB_DEVICE(ALCOR_VENDOR_ID, ALCOR_PRODUCT_ID),
  95                 .driver_info = PL2303_QUIRK_ENDPOINT_HACK },
  96         { USB_DEVICE(WS002IN_VENDOR_ID, WS002IN_PRODUCT_ID) },
  97         { USB_DEVICE(COREGA_VENDOR_ID, COREGA_PRODUCT_ID) },
  98         { USB_DEVICE(YCCABLE_VENDOR_ID, YCCABLE_PRODUCT_ID) },
  99         { USB_DEVICE(SUPERIAL_VENDOR_ID, SUPERIAL_PRODUCT_ID) },
 100         { USB_DEVICE(HP_VENDOR_ID, HP_LD220_PRODUCT_ID) },
 101         { USB_DEVICE(HP_VENDOR_ID, HP_LD220TA_PRODUCT_ID) },
 102         { USB_DEVICE(HP_VENDOR_ID, HP_LD381_PRODUCT_ID) },
 103         { USB_DEVICE(HP_VENDOR_ID, HP_LD381GC_PRODUCT_ID) },
 104         { USB_DEVICE(HP_VENDOR_ID, HP_LD960_PRODUCT_ID) },
 105         { USB_DEVICE(HP_VENDOR_ID, HP_LD960TA_PRODUCT_ID) },
 106         { USB_DEVICE(HP_VENDOR_ID, HP_LCM220_PRODUCT_ID) },
 107         { USB_DEVICE(HP_VENDOR_ID, HP_LCM960_PRODUCT_ID) },
 108         { USB_DEVICE(HP_VENDOR_ID, HP_LM920_PRODUCT_ID) },
 109         { USB_DEVICE(HP_VENDOR_ID, HP_LM940_PRODUCT_ID) },
 110         { USB_DEVICE(HP_VENDOR_ID, HP_TD620_PRODUCT_ID) },
 111         { USB_DEVICE(CRESSI_VENDOR_ID, CRESSI_EDY_PRODUCT_ID) },
 112         { USB_DEVICE(ZEAGLE_VENDOR_ID, ZEAGLE_N2ITION3_PRODUCT_ID) },
 113         { USB_DEVICE(SONY_VENDOR_ID, SONY_QN3USB_PRODUCT_ID) },
 114         { USB_DEVICE(SANWA_VENDOR_ID, SANWA_PRODUCT_ID) },
 115         { USB_DEVICE(ADLINK_VENDOR_ID, ADLINK_ND6530_PRODUCT_ID) },
 116         { USB_DEVICE(SMART_VENDOR_ID, SMART_PRODUCT_ID) },
 117         { USB_DEVICE(AT_VENDOR_ID, AT_VTKIT3_PRODUCT_ID) },
 118         { }                                     /* Terminating entry */
 119 };
 120
 121 MODULE_DEVICE_TABLE(usb, id_table);
 122
 123 #define SET_LINE_REQUEST_TYPE           0x21
 124 #define SET_LINE_REQUEST                0x20
 125
 126 #define SET_CONTROL_REQUEST_TYPE        0x21
 127 #define SET_CONTROL_REQUEST             0x22
 128 #define CONTROL_DTR                     0x01
 129 #define CONTROL_RTS                     0x02
 130
 131 #define BREAK_REQUEST_TYPE              0x21
 132 #define BREAK_REQUEST                   0x23
 133 #define BREAK_ON                        0xffff
 134 #define BREAK_OFF                       0x0000
 135
 136 #define GET_LINE_REQUEST_TYPE           0xa1
 137 #define GET_LINE_REQUEST                0x21
 138
 139 #define VENDOR_WRITE_REQUEST_TYPE       0x40
 140 #define VENDOR_WRITE_REQUEST            0x01
 141 #define VENDOR_WRITE_NREQUEST           0x80
 142
 143 #define VENDOR_READ_REQUEST_TYPE        0xc0
 144 #define VENDOR_READ_REQUEST             0x01
 145 #define VENDOR_READ_NREQUEST            0x81
 146
 147 #define UART_STATE_INDEX                8
 148 #define UART_STATE_MSR_MASK             0x8b
 149 #define UART_STATE_TRANSIENT_MASK       0x74
 150 #define UART_DCD                        0x01
 151 #define UART_DSR                        0x02
 152 #define UART_BREAK_ERROR                0x04
 153 #define UART_RING                       0x08
 154 #define UART_FRAME_ERROR                0x10
 155 #define UART_PARITY_ERROR               0x20
 156 #define UART_OVERRUN_ERROR              0x40
 157 #define UART_CTS                        0x80
 158
 159 #define PL2303_FLOWCTRL_MASK            0xf0
 160
 161 #define PL2303_READ_TYPE_HX_STATUS      0x8080
 162
 163 #define PL2303_HXN_RESET_REG            0x07
 164 #define PL2303_HXN_RESET_UPSTREAM_PIPE  0x02
 165 #define PL2303_HXN_RESET_DOWNSTREAM_PIPE        0x01
 166
 167 #define PL2303_HXN_FLOWCTRL_REG         0x0a
 168 #define PL2303_HXN_FLOWCTRL_MASK        0x1c
 169 #define PL2303_HXN_FLOWCTRL_NONE        0x1c
 170 #define PL2303_HXN_FLOWCTRL_RTS_CTS     0x18
 171 #define PL2303_HXN_FLOWCTRL_XON_XOFF    0x0c
 172
 173 static void pl2303_set_break(struct usb_serial_port *port, bool enable);
 174
 175 enum pl2303_type {
 176         TYPE_01,        /* Type 0 and 1 (difference unknown) */
 177         TYPE_HX,        /* HX version of the pl2303 chip */
 178         TYPE_HXN,       /* HXN version of the pl2303 chip */
 179         TYPE_COUNT
 180 };
 181
 182 struct pl2303_type_data {
 183         speed_t max_baud_rate;
 184         unsigned long quirks;
 185         unsigned int no_autoxonxoff:1;
 186 };
 187
 188 struct pl2303_serial_private {
 189         const struct pl2303_type_data *type;
 190         unsigned long quirks;
 191 };
 192
 193 struct pl2303_private {
 194         spinlock_t lock;
 195         u8 line_control;
 196         u8 line_status;
 197
 198         u8 line_settings[7];
 199 };
 200
 201 static const struct pl2303_type_data pl2303_type_data[TYPE_COUNT] = {
 202         [TYPE_01] = {
 203                 .max_baud_rate          = 1228800,
 204                 .quirks                 = PL2303_QUIRK_LEGACY,
 205                 .no_autoxonxoff         = true,
 206         },
 207         [TYPE_HX] = {
 208                 .max_baud_rate          = 12000000,
 209         },
 210         [TYPE_HXN] = {
 211                 .max_baud_rate          = 12000000,
 212         },
 213 };
 214
 215 static int pl2303_vendor_read(struct usb_serial *serial, u16 value,
 216                                                         unsigned char buf[1])
 217 {
 218         struct pl2303_serial_private *spriv = usb_get_serial_data(serial);
 219         struct device *dev = &serial->interface->dev;
 220         u8 request;
 221         int res;
 222
 223         if (spriv->type == &pl2303_type_data[TYPE_HXN])
 224                 request = VENDOR_READ_NREQUEST;
 225         else
 226                 request = VENDOR_READ_REQUEST;
 227
 228         res = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
 229                         request, VENDOR_READ_REQUEST_TYPE,
 230                         value, 0, buf, 1, 100);
 231         if (res != 1) {
 232                 dev_err(dev, "%s - failed to read [%04x]: %d\n", __func__,
 233                                                                 value, res);
 234                 if (res >= 0)
 235                         res = -EIO;
 236
 237                 return res;
 238         }
 239
 240         dev_dbg(dev, "%s - [%04x] = %02x\n", __func__, value, buf[0]);
 241
 242         return 0;
 243 }
 244
 245 static int pl2303_vendor_write(struct usb_serial *serial, u16 value, u16 index)
 246 {
 247         struct pl2303_serial_private *spriv = usb_get_serial_data(serial);
 248         struct device *dev = &serial->interface->dev;
 249         u8 request;
 250         int res;
 251
 252         dev_dbg(dev, "%s - [%04x] = %02x\n", __func__, value, index);
 253
 254         if (spriv->type == &pl2303_type_data[TYPE_HXN])
 255                 request = VENDOR_WRITE_NREQUEST;
 256         else
 257                 request = VENDOR_WRITE_REQUEST;
 258
 259         res = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
 260                         request, VENDOR_WRITE_REQUEST_TYPE,
 261                         value, index, NULL, 0, 100);
 262         if (res) {
 263                 dev_err(dev, "%s - failed to write [%04x]: %d\n", __func__,
 264                                                                 value, res);
 265                 return res;
 266         }
 267
 268         return 0;
 269 }
 270
 271 static int pl2303_update_reg(struct usb_serial *serial, u8 reg, u8 mask, u8 val)
 272 {
 273         struct pl2303_serial_private *spriv = usb_get_serial_data(serial);
 274         int ret = 0;
 275         u8 *buf;
 276
 277         buf = kmalloc(1, GFP_KERNEL);
 278         if (!buf)
 279                 return -ENOMEM;
 280
 281         if (spriv->type == &pl2303_type_data[TYPE_HXN])
 282                 ret = pl2303_vendor_read(serial, reg, buf);
 283         else
 284                 ret = pl2303_vendor_read(serial, reg | 0x80, buf);
 285
 286         if (ret)
 287                 goto out_free;
 288
 289         *buf &= ~mask;
 290         *buf |= val & mask;
 291
 292         ret = pl2303_vendor_write(serial, reg, *buf);
 293 out_free:
 294         kfree(buf);
 295
 296         return ret;
 297 }
 298
 299 static int pl2303_probe(struct usb_serial *serial,
 300                                         const struct usb_device_id *id)
 301 {
 302         usb_set_serial_data(serial, (void *)id->driver_info);
 303
 304         return 0;
 305 }
 306
 307 /*
 308  * Use interrupt endpoint from first interface if available.
 309  *
 310  * This is needed due to the looney way its endpoints are set up.
 311  */
 312 static int pl2303_endpoint_hack(struct usb_serial *serial,
 313                                         struct usb_serial_endpoints *epds)
 314 {
 315         struct usb_interface *interface = serial->interface;
 316         struct usb_device *dev = serial->dev;
 317         struct device *ddev = &interface->dev;
 318         struct usb_host_interface *iface_desc;
 319         struct usb_endpoint_descriptor *endpoint;
 320         unsigned int i;
 321
 322         if (interface == dev->actconfig->interface[0])
 323                 return 0;
 324
 325         /* check out the endpoints of the other interface */
 326         iface_desc = dev->actconfig->interface[0]->cur_altsetting;
 327
 328         for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) {
 329                 endpoint = &iface_desc->endpoint[i].desc;
 330
 331                 if (!usb_endpoint_is_int_in(endpoint))
 332                         continue;
 333
 334                 dev_dbg(ddev, "found interrupt in on separate interface\n");
 335                 if (epds->num_interrupt_in < ARRAY_SIZE(epds->interrupt_in))
 336                         epds->interrupt_in[epds->num_interrupt_in++] = endpoint;
 337         }
 338
 339         return 0;
 340 }
 341
 342 static int pl2303_calc_num_ports(struct usb_serial *serial,
 343                                         struct usb_serial_endpoints *epds)
 344 {
 345         unsigned long quirks = (unsigned long)usb_get_serial_data(serial);
 346         struct device *dev = &serial->interface->dev;
 347         int ret;
 348
 349         if (quirks & PL2303_QUIRK_ENDPOINT_HACK) {
 350                 ret = pl2303_endpoint_hack(serial, epds);
 351                 if (ret)
 352                         return ret;
 353         }
 354
 355         if (epds->num_interrupt_in < 1) {
 356                 dev_err(dev, "required interrupt-in endpoint missing\n");
 357                 return -ENODEV;
 358         }
 359
 360         return 1;
 361 }
 362
 363 static int pl2303_startup(struct usb_serial *serial)
 364 {
 365         struct pl2303_serial_private *spriv;
 366         enum pl2303_type type = TYPE_01;
 367         unsigned char *buf;
 368         int res;
 369
 370         spriv = kzalloc(sizeof(*spriv), GFP_KERNEL);
 371         if (!spriv)
 372                 return -ENOMEM;
 373
 374         buf = kmalloc(1, GFP_KERNEL);
 375         if (!buf) {
 376                 kfree(spriv);
 377                 return -ENOMEM;
 378         }
 379
 380         if (serial->dev->descriptor.bDeviceClass == 0x02)
 381                 type = TYPE_01;         /* type 0 */
 382         else if (serial->dev->descriptor.bMaxPacketSize0 == 0x40)
 383                 type = TYPE_HX;
 384         else if (serial->dev->descriptor.bDeviceClass == 0x00)
 385                 type = TYPE_01;         /* type 1 */
 386         else if (serial->dev->descriptor.bDeviceClass == 0xFF)
 387                 type = TYPE_01;         /* type 1 */
 388         dev_dbg(&serial->interface->dev, "device type: %d\n", type);
 389
 390         if (type == TYPE_HX) {
 391                 res = usb_control_msg(serial->dev,
 392                                 usb_rcvctrlpipe(serial->dev, 0),
 393                                 VENDOR_READ_REQUEST, VENDOR_READ_REQUEST_TYPE,
 394                                 PL2303_READ_TYPE_HX_STATUS, 0, buf, 1, 100);
 395                 if (res != 1)
 396                         type = TYPE_HXN;
 397         }
 398
 399         spriv->type = &pl2303_type_data[type];
 400         spriv->quirks = (unsigned long)usb_get_serial_data(serial);
 401         spriv->quirks |= spriv->type->quirks;
 402
 403         usb_set_serial_data(serial, spriv);
 404
 405         if (type != TYPE_HXN) {
 406                 pl2303_vendor_read(serial, 0x8484, buf);
 407                 pl2303_vendor_write(serial, 0x0404, 0);
 408                 pl2303_vendor_read(serial, 0x8484, buf);
 409                 pl2303_vendor_read(serial, 0x8383, buf);
 410                 pl2303_vendor_read(serial, 0x8484, buf);
 411                 pl2303_vendor_write(serial, 0x0404, 1);
 412                 pl2303_vendor_read(serial, 0x8484, buf);
 413                 pl2303_vendor_read(serial, 0x8383, buf);
 414                 pl2303_vendor_write(serial, 0, 1);
 415                 pl2303_vendor_write(serial, 1, 0);
 416                 if (spriv->quirks & PL2303_QUIRK_LEGACY)
 417                         pl2303_vendor_write(serial, 2, 0x24);
 418                 else
 419                         pl2303_vendor_write(serial, 2, 0x44);
 420         }
 421
 422         kfree(buf);
 423
 424         return 0;
 425 }
 426
 427 static void pl2303_release(struct usb_serial *serial)
 428 {
 429         struct pl2303_serial_private *spriv = usb_get_serial_data(serial);
 430
 431         kfree(spriv);
 432 }
 433
 434 static int pl2303_port_probe(struct usb_serial_port *port)
 435 {
 436         struct pl2303_private *priv;
 437
 438         priv = kzalloc(sizeof(*priv), GFP_KERNEL);
 439         if (!priv)
 440                 return -ENOMEM;
 441
 442         spin_lock_init(&priv->lock);
 443
 444         usb_set_serial_port_data(port, priv);
 445
 446         port->port.drain_delay = 256;
 447
 448         return 0;
 449 }
 450
 451 static int pl2303_port_remove(struct usb_serial_port *port)
 452 {
 453         struct pl2303_private *priv = usb_get_serial_port_data(port);
 454
 455         kfree(priv);
 456
 457         return 0;
 458 }
 459
 460 static int pl2303_set_control_lines(struct usb_serial_port *port, u8 value)
 461 {
 462         struct usb_device *dev = port->serial->dev;
 463         int retval;
 464
 465         dev_dbg(&port->dev, "%s - %02x\n", __func__, value);
 466
 467         retval = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
 468                                  SET_CONTROL_REQUEST, SET_CONTROL_REQUEST_TYPE,
 469                                  value, 0, NULL, 0, 100);
 470         if (retval)
 471                 dev_err(&port->dev, "%s - failed: %d\n", __func__, retval);
 472
 473         return retval;
 474 }
 475
 476 /*
 477  * Returns the nearest supported baud rate that can be set directly without
 478  * using divisors.
 479  */
 480 static speed_t pl2303_get_supported_baud_rate(speed_t baud)
 481 {
 482         static const speed_t baud_sup[] = {
 483                 75, 150, 300, 600, 1200, 1800, 2400, 3600, 4800, 7200, 9600,
 484                 14400, 19200, 28800, 38400, 57600, 115200, 230400, 460800,
 485                 614400, 921600, 1228800, 2457600, 3000000, 6000000
 486         };
 487
 488         unsigned i;
 489
 490         for (i = 0; i < ARRAY_SIZE(baud_sup); ++i) {
 491                 if (baud_sup[i] > baud)
 492                         break;
 493         }
 494
 495         if (i == ARRAY_SIZE(baud_sup))
 496                 baud = baud_sup[i - 1];
 497         else if (i > 0 && (baud_sup[i] - baud) > (baud - baud_sup[i - 1]))
 498                 baud = baud_sup[i - 1];
 499         else
 500                 baud = baud_sup[i];
 501
 502         return baud;
 503 }
 504
 505 /*
 506  * NOTE: If unsupported baud rates are set directly, the PL2303 seems to
 507  *       use 9600 baud.
 508  */
 509 static speed_t pl2303_encode_baud_rate_direct(unsigned char buf[4],
 510                                                                 speed_t baud)
 511 {
 512         put_unaligned_le32(baud, buf);
 513
 514         return baud;
 515 }
 516
 517 static speed_t pl2303_encode_baud_rate_divisor(unsigned char buf[4],
 518                                                                 speed_t baud)
 519 {
 520         unsigned int baseline, mantissa, exponent;
 521
 522         /*
 523          * Apparently the formula is:
 524          *   baudrate = 12M * 32 / (mantissa * 4^exponent)
 525          * where
 526          *   mantissa = buf[8:0]
 527          *   exponent = buf[11:9]
 528          */
 529         baseline = 12000000 * 32;
 530         mantissa = baseline / baud;
 531         if (mantissa == 0)
 532                 mantissa = 1;   /* Avoid dividing by zero if baud > 32*12M. */
 533         exponent = 0;
 534         while (mantissa >= 512) {
 535                 if (exponent < 7) {
 536                         mantissa >>= 2; /* divide by 4 */
 537                         exponent++;
 538                 } else {
 539                         /* Exponent is maxed. Trim mantissa and leave. */
 540                         mantissa = 511;
 541                         break;
 542                 }
 543         }
 544
 545         buf[3] = 0x80;
 546         buf[2] = 0;
 547         buf[1] = exponent << 1 | mantissa >> 8;
 548         buf[0] = mantissa & 0xff;
 549
 550         /* Calculate and return the exact baud rate. */
 551         baud = (baseline / mantissa) >> (exponent << 1);
 552
 553         return baud;
 554 }
 555
 556 static void pl2303_encode_baud_rate(struct tty_struct *tty,
 557                                         struct usb_serial_port *port,
 558                                         u8 buf[4])
 559 {
 560         struct usb_serial *serial = port->serial;
 561         struct pl2303_serial_private *spriv = usb_get_serial_data(serial);
 562         speed_t baud_sup;
 563         speed_t baud;
 564
 565         baud = tty_get_baud_rate(tty);
 566         dev_dbg(&port->dev, "baud requested = %u\n", baud);
 567         if (!baud)
 568                 return;
 569
 570         if (spriv->type->max_baud_rate)
 571                 baud = min_t(speed_t, baud, spriv->type->max_baud_rate);
 572         /*
 573          * Use direct method for supported baud rates, otherwise use divisors.
 574          */
 575         baud_sup = pl2303_get_supported_baud_rate(baud);
 576
 577         if (baud == baud_sup)
 578                 baud = pl2303_encode_baud_rate_direct(buf, baud);
 579         else
 580                 baud = pl2303_encode_baud_rate_divisor(buf, baud);
 581
 582         /* Save resulting baud rate */
 583         tty_encode_baud_rate(tty, baud, baud);
 584         dev_dbg(&port->dev, "baud set = %u\n", baud);
 585 }
 586
 587 static int pl2303_get_line_request(struct usb_serial_port *port,
 588                                                         unsigned char buf[7])
 589 {
 590         struct usb_device *udev = port->serial->dev;
 591         int ret;
 592
 593         ret = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
 594                                 GET_LINE_REQUEST, GET_LINE_REQUEST_TYPE,
 595                                 0, 0, buf, 7, 100);
 596         if (ret != 7) {
 597                 dev_err(&port->dev, "%s - failed: %d\n", __func__, ret);
 598
 599                 if (ret >= 0)
 600                         ret = -EIO;
 601
 602                 return ret;
 603         }
 604
 605         dev_dbg(&port->dev, "%s - %7ph\n", __func__, buf);
 606
 607         return 0;
 608 }
 609
 610 static int pl2303_set_line_request(struct usb_serial_port *port,
 611                                                         unsigned char buf[7])
 612 {
 613         struct usb_device *udev = port->serial->dev;
 614         int ret;
 615
 616         ret = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
 617                                 SET_LINE_REQUEST, SET_LINE_REQUEST_TYPE,
 618                                 0, 0, buf, 7, 100);
 619         if (ret < 0) {
 620                 dev_err(&port->dev, "%s - failed: %d\n", __func__, ret);
 621                 return ret;
 622         }
 623
 624         dev_dbg(&port->dev, "%s - %7ph\n", __func__, buf);
 625
 626         return 0;
 627 }
 628
 629 static bool pl2303_termios_change(const struct ktermios *a, const struct ktermios *b)
 630 {
 631         bool ixon_change;
 632
 633         ixon_change = ((a->c_iflag ^ b->c_iflag) & (IXON | IXANY)) ||
 634                         a->c_cc[VSTART] != b->c_cc[VSTART] ||
 635                         a->c_cc[VSTOP] != b->c_cc[VSTOP];
 636
 637         return tty_termios_hw_change(a, b) || ixon_change;
 638 }
 639
 640 static bool pl2303_enable_xonxoff(struct tty_struct *tty, const struct pl2303_type_data *type)
 641 {
 642         if (!I_IXON(tty) || I_IXANY(tty))
 643                 return false;
 644
 645         if (START_CHAR(tty) != 0x11 || STOP_CHAR(tty) != 0x13)
 646                 return false;
 647
 648         if (type->no_autoxonxoff)
 649                 return false;
 650
 651         return true;
 652 }
 653
 654 static void pl2303_set_termios(struct tty_struct *tty,
 655                 struct usb_serial_port *port, struct ktermios *old_termios)
 656 {
 657         struct usb_serial *serial = port->serial;
 658         struct pl2303_serial_private *spriv = usb_get_serial_data(serial);
 659         struct pl2303_private *priv = usb_get_serial_port_data(port);
 660         unsigned long flags;
 661         unsigned char *buf;
 662         int ret;
 663         u8 control;
 664
 665         if (old_termios && !pl2303_termios_change(&tty->termios, old_termios))
 666                 return;
 667
 668         buf = kzalloc(7, GFP_KERNEL);
 669         if (!buf) {
 670                 /* Report back no change occurred */
 671                 if (old_termios)
 672                         tty->termios = *old_termios;
 673                 return;
 674         }
 675
 676         pl2303_get_line_request(port, buf);
 677
 678         switch (C_CSIZE(tty)) {
 679         case CS5:
 680                 buf[6] = 5;
 681                 break;
 682         case CS6:
 683                 buf[6] = 6;
 684                 break;
 685         case CS7:
 686                 buf[6] = 7;
 687                 break;
 688         default:
 689         case CS8:
 690                 buf[6] = 8;
 691         }
 692         dev_dbg(&port->dev, "data bits = %d\n", buf[6]);
 693
 694         /* For reference buf[0]:buf[3] baud rate value */
 695         pl2303_encode_baud_rate(tty, port, &buf[0]);
 696
 697         /* For reference buf[4]=0 is 1 stop bits */
 698         /* For reference buf[4]=1 is 1.5 stop bits */
 699         /* For reference buf[4]=2 is 2 stop bits */
 700         if (C_CSTOPB(tty)) {
 701                 /*
 702                  * NOTE: Comply with "real" UARTs / RS232:
 703                  *       use 1.5 instead of 2 stop bits with 5 data bits
 704                  */
 705                 if (C_CSIZE(tty) == CS5) {
 706                         buf[4] = 1;
 707                         dev_dbg(&port->dev, "stop bits = 1.5\n");
 708                 } else {
 709                         buf[4] = 2;
 710                         dev_dbg(&port->dev, "stop bits = 2\n");
 711                 }
 712         } else {
 713                 buf[4] = 0;
 714                 dev_dbg(&port->dev, "stop bits = 1\n");
 715         }
 716
 717         if (C_PARENB(tty)) {
 718                 /* For reference buf[5]=0 is none parity */
 719                 /* For reference buf[5]=1 is odd parity */
 720                 /* For reference buf[5]=2 is even parity */
 721                 /* For reference buf[5]=3 is mark parity */
 722                 /* For reference buf[5]=4 is space parity */
 723                 if (C_PARODD(tty)) {
 724                         if (C_CMSPAR(tty)) {
 725                                 buf[5] = 3;
 726                                 dev_dbg(&port->dev, "parity = mark\n");
 727                         } else {
 728                                 buf[5] = 1;
 729                                 dev_dbg(&port->dev, "parity = odd\n");
 730                         }
 731                 } else {
 732                         if (C_CMSPAR(tty)) {
 733                                 buf[5] = 4;
 734                                 dev_dbg(&port->dev, "parity = space\n");
 735                         } else {
 736                                 buf[5] = 2;
 737                                 dev_dbg(&port->dev, "parity = even\n");
 738                         }
 739                 }
 740         } else {
 741                 buf[5] = 0;
 742                 dev_dbg(&port->dev, "parity = none\n");
 743         }
 744
 745         /*
 746          * Some PL2303 are known to lose bytes if you change serial settings
 747          * even to the same values as before. Thus we actually need to filter
 748          * in this specific case.
 749          *
 750          * Note that the tty_termios_hw_change check above is not sufficient
 751          * as a previously requested baud rate may differ from the one
 752          * actually used (and stored in old_termios).
 753          *
 754          * NOTE: No additional locking needed for line_settings as it is
 755          *       only used in set_termios, which is serialised against itself.
 756          */
 757         if (!old_termios || memcmp(buf, priv->line_settings, 7)) {
 758                 ret = pl2303_set_line_request(port, buf);
 759                 if (!ret)
 760                         memcpy(priv->line_settings, buf, 7);
 761         }
 762
 763         /* change control lines if we are switching to or from B0 */
 764         spin_lock_irqsave(&priv->lock, flags);
 765         control = priv->line_control;
 766         if (C_BAUD(tty) == B0)
 767                 priv->line_control &= ~(CONTROL_DTR | CONTROL_RTS);
 768         else if (old_termios && (old_termios->c_cflag & CBAUD) == B0)
 769                 priv->line_control |= (CONTROL_DTR | CONTROL_RTS);
 770         if (control != priv->line_control) {
 771                 control = priv->line_control;
 772                 spin_unlock_irqrestore(&priv->lock, flags);
 773                 pl2303_set_control_lines(port, control);
 774         } else {
 775                 spin_unlock_irqrestore(&priv->lock, flags);
 776         }
 777
 778         if (C_CRTSCTS(tty)) {
 779                 if (spriv->quirks & PL2303_QUIRK_LEGACY) {
 780                         pl2303_update_reg(serial, 0, PL2303_FLOWCTRL_MASK, 0x40);
 781                 } else if (spriv->type == &pl2303_type_data[TYPE_HXN]) {
 782                         pl2303_update_reg(serial, PL2303_HXN_FLOWCTRL_REG,
 783                                         PL2303_HXN_FLOWCTRL_MASK,
 784                                         PL2303_HXN_FLOWCTRL_RTS_CTS);
 785                 } else {
 786                         pl2303_update_reg(serial, 0, PL2303_FLOWCTRL_MASK, 0x60);
 787                 }
 788         } else if (pl2303_enable_xonxoff(tty, spriv->type)) {
 789                 if (spriv->type == &pl2303_type_data[TYPE_HXN]) {
 790                         pl2303_update_reg(serial, PL2303_HXN_FLOWCTRL_REG,
 791                                         PL2303_HXN_FLOWCTRL_MASK,
 792                                         PL2303_HXN_FLOWCTRL_XON_XOFF);
 793                 } else {
 794                         pl2303_update_reg(serial, 0, PL2303_FLOWCTRL_MASK, 0xc0);
 795                 }
 796         } else {
 797                 if (spriv->type == &pl2303_type_data[TYPE_HXN]) {
 798                         pl2303_update_reg(serial, PL2303_HXN_FLOWCTRL_REG,
 799                                         PL2303_HXN_FLOWCTRL_MASK,
 800                                         PL2303_HXN_FLOWCTRL_NONE);
 801                 } else {
 802                         pl2303_update_reg(serial, 0, PL2303_FLOWCTRL_MASK, 0);
 803                 }
 804         }
 805
 806         kfree(buf);
 807 }
 808
 809 static void pl2303_dtr_rts(struct usb_serial_port *port, int on)
 810 {
 811         struct pl2303_private *priv = usb_get_serial_port_data(port);
 812         unsigned long flags;
 813         u8 control;
 814
 815         spin_lock_irqsave(&priv->lock, flags);
 816         if (on)
 817                 priv->line_control |= (CONTROL_DTR | CONTROL_RTS);
 818         else
 819                 priv->line_control &= ~(CONTROL_DTR | CONTROL_RTS);
 820         control = priv->line_control;
 821         spin_unlock_irqrestore(&priv->lock, flags);
 822
 823         pl2303_set_control_lines(port, control);
 824 }
 825
 826 static void pl2303_close(struct usb_serial_port *port)
 827 {
 828         usb_serial_generic_close(port);
 829         usb_kill_urb(port->interrupt_in_urb);
 830         pl2303_set_break(port, false);
 831 }
 832
 833 static int pl2303_open(struct tty_struct *tty, struct usb_serial_port *port)
 834 {
 835         struct usb_serial *serial = port->serial;
 836         struct pl2303_serial_private *spriv = usb_get_serial_data(serial);
 837         int result;
 838
 839         if (spriv->quirks & PL2303_QUIRK_LEGACY) {
 840                 usb_clear_halt(serial->dev, port->write_urb->pipe);
 841                 usb_clear_halt(serial->dev, port->read_urb->pipe);
 842         } else {
 843                 /* reset upstream data pipes */
 844                 if (spriv->type == &pl2303_type_data[TYPE_HXN]) {
 845                         pl2303_vendor_write(serial, PL2303_HXN_RESET_REG,
 846                                         PL2303_HXN_RESET_UPSTREAM_PIPE |
 847                                         PL2303_HXN_RESET_DOWNSTREAM_PIPE);
 848                 } else {
 849                         pl2303_vendor_write(serial, 8, 0);
 850                         pl2303_vendor_write(serial, 9, 0);
 851                 }
 852         }
 853
 854         /* Setup termios */
 855         if (tty)
 856                 pl2303_set_termios(tty, port, NULL);
 857
 858         result = usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL);
 859         if (result) {
 860                 dev_err(&port->dev, "failed to submit interrupt urb: %d\n",
 861                         result);
 862                 return result;
 863         }
 864
 865         result = usb_serial_generic_open(tty, port);
 866         if (result) {
 867                 usb_kill_urb(port->interrupt_in_urb);
 868                 return result;
 869         }
 870
 871         return 0;
 872 }
 873
 874 static int pl2303_tiocmset(struct tty_struct *tty,
 875                            unsigned int set, unsigned int clear)
 876 {
 877         struct usb_serial_port *port = tty->driver_data;
 878         struct pl2303_private *priv = usb_get_serial_port_data(port);
 879         unsigned long flags;
 880         u8 control;
 881         int ret;
 882
 883         spin_lock_irqsave(&priv->lock, flags);
 884         if (set & TIOCM_RTS)
 885                 priv->line_control |= CONTROL_RTS;
 886         if (set & TIOCM_DTR)
 887                 priv->line_control |= CONTROL_DTR;
 888         if (clear & TIOCM_RTS)
 889                 priv->line_control &= ~CONTROL_RTS;
 890         if (clear & TIOCM_DTR)
 891                 priv->line_control &= ~CONTROL_DTR;
 892         control = priv->line_control;
 893         spin_unlock_irqrestore(&priv->lock, flags);
 894
 895         ret = pl2303_set_control_lines(port, control);
 896         if (ret)
 897                 return usb_translate_errors(ret);
 898
 899         return 0;
 900 }
 901
 902 static int pl2303_tiocmget(struct tty_struct *tty)
 903 {
 904         struct usb_serial_port *port = tty->driver_data;
 905         struct pl2303_private *priv = usb_get_serial_port_data(port);
 906         unsigned long flags;
 907         unsigned int mcr;
 908         unsigned int status;
 909         unsigned int result;
 910
 911         spin_lock_irqsave(&priv->lock, flags);
 912         mcr = priv->line_control;
 913         status = priv->line_status;
 914         spin_unlock_irqrestore(&priv->lock, flags);
 915
 916         result = ((mcr & CONTROL_DTR)           ? TIOCM_DTR : 0)
 917                   | ((mcr & CONTROL_RTS)        ? TIOCM_RTS : 0)
 918                   | ((status & UART_CTS)        ? TIOCM_CTS : 0)
 919                   | ((status & UART_DSR)        ? TIOCM_DSR : 0)
 920                   | ((status & UART_RING)       ? TIOCM_RI  : 0)
 921                   | ((status & UART_DCD)        ? TIOCM_CD  : 0);
 922
 923         dev_dbg(&port->dev, "%s - result = %x\n", __func__, result);
 924
 925         return result;
 926 }
 927
 928 static int pl2303_carrier_raised(struct usb_serial_port *port)
 929 {
 930         struct pl2303_private *priv = usb_get_serial_port_data(port);
 931
 932         if (priv->line_status & UART_DCD)
 933                 return 1;
 934
 935         return 0;
 936 }
 937
 938 static int pl2303_get_serial(struct tty_struct *tty,
 939                         struct serial_struct *ss)
 940 {
 941         struct usb_serial_port *port = tty->driver_data;
 942
 943         ss->type = PORT_16654;
 944         ss->line = port->minor;
 945         ss->port = port->port_number;
 946         ss->baud_base = 460800;
 947         return 0;
 948 }
 949
 950 static void pl2303_set_break(struct usb_serial_port *port, bool enable)
 951 {
 952         struct usb_serial *serial = port->serial;
 953         u16 state;
 954         int result;
 955
 956         if (enable)
 957                 state = BREAK_ON;
 958         else
 959                 state = BREAK_OFF;
 960
 961         dev_dbg(&port->dev, "%s - turning break %s\n", __func__,
 962                         state == BREAK_OFF ? "off" : "on");
 963
 964         result = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
 965                                  BREAK_REQUEST, BREAK_REQUEST_TYPE, state,
 966                                  0, NULL, 0, 100);
 967         if (result)
 968                 dev_err(&port->dev, "error sending break = %d\n", result);
 969 }
 970
 971 static void pl2303_break_ctl(struct tty_struct *tty, int state)
 972 {
 973         struct usb_serial_port *port = tty->driver_data;
 974
 975         pl2303_set_break(port, state);
 976 }
 977
 978 static void pl2303_update_line_status(struct usb_serial_port *port,
 979                                       unsigned char *data,
 980                                       unsigned int actual_length)
 981 {
 982         struct usb_serial *serial = port->serial;
 983         struct pl2303_serial_private *spriv = usb_get_serial_data(serial);
 984         struct pl2303_private *priv = usb_get_serial_port_data(port);
 985         struct tty_struct *tty;
 986         unsigned long flags;
 987         unsigned int status_idx = UART_STATE_INDEX;
 988         u8 status;
 989         u8 delta;
 990
 991         if (spriv->quirks & PL2303_QUIRK_UART_STATE_IDX0)
 992                 status_idx = 0;
 993
 994         if (actual_length < status_idx + 1)
 995                 return;
 996
 997         status = data[status_idx];
 998
 999         /* Save off the uart status for others to look at */
1000         spin_lock_irqsave(&priv->lock, flags);
1001         delta = priv->line_status ^ status;
1002         priv->line_status = status;
1003         spin_unlock_irqrestore(&priv->lock, flags);
1004
1005         if (status & UART_BREAK_ERROR)
1006                 usb_serial_handle_break(port);
1007
1008         if (delta & UART_STATE_MSR_MASK) {
1009                 if (delta & UART_CTS)
1010                         port->icount.cts++;
1011                 if (delta & UART_DSR)
1012                         port->icount.dsr++;
1013                 if (delta & UART_RING)
1014                         port->icount.rng++;
1015                 if (delta & UART_DCD) {
1016                         port->icount.dcd++;
1017                         tty = tty_port_tty_get(&port->port);
1018                         if (tty) {
1019                                 usb_serial_handle_dcd_change(port, tty,
1020                                                         status & UART_DCD);
1021                                 tty_kref_put(tty);
1022                         }
1023                 }
1024
1025                 wake_up_interruptible(&port->port.delta_msr_wait);
1026         }
1027 }
1028
1029 static void pl2303_read_int_callback(struct urb *urb)
1030 {
1031         struct usb_serial_port *port =  urb->context;
1032         unsigned char *data = urb->transfer_buffer;
1033         unsigned int actual_length = urb->actual_length;
1034         int status = urb->status;
1035         int retval;
1036
1037         switch (status) {
1038         case 0:
1039                 /* success */
1040                 break;
1041         case -ECONNRESET:
1042         case -ENOENT:
1043         case -ESHUTDOWN:
1044                 /* this urb is terminated, clean up */
1045                 dev_dbg(&port->dev, "%s - urb shutting down with status: %d\n",
1046                         __func__, status);
1047                 return;
1048         default:
1049                 dev_dbg(&port->dev, "%s - nonzero urb status received: %d\n",
1050                         __func__, status);
1051                 goto exit;
1052         }
1053
1054         usb_serial_debug_data(&port->dev, __func__,
1055                               urb->actual_length, urb->transfer_buffer);
1056
1057         pl2303_update_line_status(port, data, actual_length);
1058
1059 exit:
1060         retval = usb_submit_urb(urb, GFP_ATOMIC);
1061         if (retval) {
1062                 dev_err(&port->dev,
1063                         "%s - usb_submit_urb failed with result %d\n",
1064                         __func__, retval);
1065         }
1066 }
1067
1068 static void pl2303_process_read_urb(struct urb *urb)
1069 {
1070         struct usb_serial_port *port = urb->context;
1071         struct pl2303_private *priv = usb_get_serial_port_data(port);
1072         unsigned char *data = urb->transfer_buffer;
1073         char tty_flag = TTY_NORMAL;
1074         unsigned long flags;
1075         u8 line_status;
1076         int i;
1077
1078         /* update line status */
1079         spin_lock_irqsave(&priv->lock, flags);
1080         line_status = priv->line_status;
1081         priv->line_status &= ~UART_STATE_TRANSIENT_MASK;
1082         spin_unlock_irqrestore(&priv->lock, flags);
1083
1084         if (!urb->actual_length)
1085                 return;
1086
1087         /*
1088          * Break takes precedence over parity, which takes precedence over
1089          * framing errors.
1090          */
1091         if (line_status & UART_BREAK_ERROR)
1092                 tty_flag = TTY_BREAK;
1093         else if (line_status & UART_PARITY_ERROR)
1094                 tty_flag = TTY_PARITY;
1095         else if (line_status & UART_FRAME_ERROR)
1096                 tty_flag = TTY_FRAME;
1097
1098         if (tty_flag != TTY_NORMAL)
1099                 dev_dbg(&port->dev, "%s - tty_flag = %d\n", __func__,
1100                                                                 tty_flag);
1101         /* overrun is special, not associated with a char */
1102         if (line_status & UART_OVERRUN_ERROR)
1103                 tty_insert_flip_char(&port->port, 0, TTY_OVERRUN);
1104
1105         if (port->sysrq) {
1106                 for (i = 0; i < urb->actual_length; ++i)
1107                         if (!usb_serial_handle_sysrq_char(port, data[i]))
1108                                 tty_insert_flip_char(&port->port, data[i],
1109                                                 tty_flag);
1110         } else {
1111                 tty_insert_flip_string_fixed_flag(&port->port, data, tty_flag,
1112                                                         urb->actual_length);
1113         }
1114
1115         tty_flip_buffer_push(&port->port);
1116 }
1117
1118 static struct usb_serial_driver pl2303_device = {
1119         .driver = {
1120                 .owner =        THIS_MODULE,
1121                 .name =         "pl2303",
1122         },
1123         .id_table =             id_table,
1124         .num_bulk_in =          1,
1125         .num_bulk_out =         1,
1126         .num_interrupt_in =     0,      /* see pl2303_calc_num_ports */
1127         .bulk_in_size =         256,
1128         .bulk_out_size =        256,
1129         .open =                 pl2303_open,
1130         .close =                pl2303_close,
1131         .dtr_rts =              pl2303_dtr_rts,
1132         .carrier_raised =       pl2303_carrier_raised,
1133         .get_serial =           pl2303_get_serial,
1134         .break_ctl =            pl2303_break_ctl,
1135         .set_termios =          pl2303_set_termios,
1136         .tiocmget =             pl2303_tiocmget,
1137         .tiocmset =             pl2303_tiocmset,
1138         .tiocmiwait =           usb_serial_generic_tiocmiwait,
1139         .process_read_urb =     pl2303_process_read_urb,
1140         .read_int_callback =    pl2303_read_int_callback,
1141         .probe =                pl2303_probe,
1142         .calc_num_ports =       pl2303_calc_num_ports,
1143         .attach =               pl2303_startup,
1144         .release =              pl2303_release,
1145         .port_probe =           pl2303_port_probe,
1146         .port_remove =          pl2303_port_remove,
1147 };
1148
1149 static struct usb_serial_driver * const serial_drivers[] = {
1150         &pl2303_device, NULL
1151 };
1152
1153 module_usb_serial_driver(serial_drivers, id_table);
1154
1155 MODULE_DESCRIPTION("Prolific PL2303 USB to serial adaptor driver");
1156 MODULE_LICENSE("GPL v2");