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_LD960_PRODUCT_ID) },
 104         { USB_DEVICE(HP_VENDOR_ID, HP_LD960TA_PRODUCT_ID) },
 105         { USB_DEVICE(HP_VENDOR_ID, HP_LCM220_PRODUCT_ID) },
 106         { USB_DEVICE(HP_VENDOR_ID, HP_LCM960_PRODUCT_ID) },
 107         { USB_DEVICE(HP_VENDOR_ID, HP_LM920_PRODUCT_ID) },
 108         { USB_DEVICE(HP_VENDOR_ID, HP_LM940_PRODUCT_ID) },
 109         { USB_DEVICE(HP_VENDOR_ID, HP_TD620_PRODUCT_ID) },
 110         { USB_DEVICE(CRESSI_VENDOR_ID, CRESSI_EDY_PRODUCT_ID) },
 111         { USB_DEVICE(ZEAGLE_VENDOR_ID, ZEAGLE_N2ITION3_PRODUCT_ID) },
 112         { USB_DEVICE(SONY_VENDOR_ID, SONY_QN3USB_PRODUCT_ID) },
 113         { USB_DEVICE(SANWA_VENDOR_ID, SANWA_PRODUCT_ID) },
 114         { USB_DEVICE(ADLINK_VENDOR_ID, ADLINK_ND6530_PRODUCT_ID) },
 115         { USB_DEVICE(SMART_VENDOR_ID, SMART_PRODUCT_ID) },
 116         { USB_DEVICE(AT_VENDOR_ID, AT_VTKIT3_PRODUCT_ID) },
 117         { }                                     /* Terminating entry */
 118 };
 119
 120 MODULE_DEVICE_TABLE(usb, id_table);
 121
 122 #define SET_LINE_REQUEST_TYPE           0x21
 123 #define SET_LINE_REQUEST                0x20
 124
 125 #define SET_CONTROL_REQUEST_TYPE        0x21
 126 #define SET_CONTROL_REQUEST             0x22
 127 #define CONTROL_DTR                     0x01
 128 #define CONTROL_RTS                     0x02
 129
 130 #define BREAK_REQUEST_TYPE              0x21
 131 #define BREAK_REQUEST                   0x23
 132 #define BREAK_ON                        0xffff
 133 #define BREAK_OFF                       0x0000
 134
 135 #define GET_LINE_REQUEST_TYPE           0xa1
 136 #define GET_LINE_REQUEST                0x21
 137
 138 #define VENDOR_WRITE_REQUEST_TYPE       0x40
 139 #define VENDOR_WRITE_REQUEST            0x01
 140 #define VENDOR_WRITE_NREQUEST           0x80
 141
 142 #define VENDOR_READ_REQUEST_TYPE        0xc0
 143 #define VENDOR_READ_REQUEST             0x01
 144 #define VENDOR_READ_NREQUEST            0x81
 145
 146 #define UART_STATE_INDEX                8
 147 #define UART_STATE_MSR_MASK             0x8b
 148 #define UART_STATE_TRANSIENT_MASK       0x74
 149 #define UART_DCD                        0x01
 150 #define UART_DSR                        0x02
 151 #define UART_BREAK_ERROR                0x04
 152 #define UART_RING                       0x08
 153 #define UART_FRAME_ERROR                0x10
 154 #define UART_PARITY_ERROR               0x20
 155 #define UART_OVERRUN_ERROR              0x40
 156 #define UART_CTS                        0x80
 157
 158 #define PL2303_FLOWCTRL_MASK            0xf0
 159
 160 #define PL2303_READ_TYPE_HX_STATUS      0x8080
 161
 162 #define PL2303_HXN_RESET_REG            0x07
 163 #define PL2303_HXN_RESET_UPSTREAM_PIPE  0x02
 164 #define PL2303_HXN_RESET_DOWNSTREAM_PIPE        0x01
 165
 166 #define PL2303_HXN_FLOWCTRL_REG         0x0a
 167 #define PL2303_HXN_FLOWCTRL_MASK        0x1c
 168 #define PL2303_HXN_FLOWCTRL_NONE        0x1c
 169 #define PL2303_HXN_FLOWCTRL_RTS_CTS     0x18
 170 #define PL2303_HXN_FLOWCTRL_XON_XOFF    0x0c
 171
 172 static void pl2303_set_break(struct usb_serial_port *port, bool enable);
 173
 174 enum pl2303_type {
 175         TYPE_01,        /* Type 0 and 1 (difference unknown) */
 176         TYPE_HX,        /* HX version of the pl2303 chip */
 177         TYPE_HXN,       /* HXN version of the pl2303 chip */
 178         TYPE_COUNT
 179 };
 180
 181 struct pl2303_type_data {
 182         speed_t max_baud_rate;
 183         unsigned long quirks;
 184         unsigned int no_autoxonxoff:1;
 185 };
 186
 187 struct pl2303_serial_private {
 188         const struct pl2303_type_data *type;
 189         unsigned long quirks;
 190 };
 191
 192 struct pl2303_private {
 193         spinlock_t lock;
 194         u8 line_control;
 195         u8 line_status;
 196
 197         u8 line_settings[7];
 198 };
 199
 200 static const struct pl2303_type_data pl2303_type_data[TYPE_COUNT] = {
 201         [TYPE_01] = {
 202                 .max_baud_rate          = 1228800,
 203                 .quirks                 = PL2303_QUIRK_LEGACY,
 204                 .no_autoxonxoff         = true,
 205         },
 206         [TYPE_HX] = {
 207                 .max_baud_rate          = 12000000,
 208         },
 209         [TYPE_HXN] = {
 210                 .max_baud_rate          = 12000000,
 211         },
 212 };
 213
 214 static int pl2303_vendor_read(struct usb_serial *serial, u16 value,
 215                                                         unsigned char buf[1])
 216 {
 217         struct pl2303_serial_private *spriv = usb_get_serial_data(serial);
 218         struct device *dev = &serial->interface->dev;
 219         u8 request;
 220         int res;
 221
 222         if (spriv->type == &pl2303_type_data[TYPE_HXN])
 223                 request = VENDOR_READ_NREQUEST;
 224         else
 225                 request = VENDOR_READ_REQUEST;
 226
 227         res = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
 228                         request, VENDOR_READ_REQUEST_TYPE,
 229                         value, 0, buf, 1, 100);
 230         if (res != 1) {
 231                 dev_err(dev, "%s - failed to read [%04x]: %d\n", __func__,
 232                                                                 value, res);
 233                 if (res >= 0)
 234                         res = -EIO;
 235
 236                 return res;
 237         }
 238
 239         dev_dbg(dev, "%s - [%04x] = %02x\n", __func__, value, buf[0]);
 240
 241         return 0;
 242 }
 243
 244 static int pl2303_vendor_write(struct usb_serial *serial, u16 value, u16 index)
 245 {
 246         struct pl2303_serial_private *spriv = usb_get_serial_data(serial);
 247         struct device *dev = &serial->interface->dev;
 248         u8 request;
 249         int res;
 250
 251         dev_dbg(dev, "%s - [%04x] = %02x\n", __func__, value, index);
 252
 253         if (spriv->type == &pl2303_type_data[TYPE_HXN])
 254                 request = VENDOR_WRITE_NREQUEST;
 255         else
 256                 request = VENDOR_WRITE_REQUEST;
 257
 258         res = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
 259                         request, VENDOR_WRITE_REQUEST_TYPE,
 260                         value, index, NULL, 0, 100);
 261         if (res) {
 262                 dev_err(dev, "%s - failed to write [%04x]: %d\n", __func__,
 263                                                                 value, res);
 264                 return res;
 265         }
 266
 267         return 0;
 268 }
 269
 270 static int pl2303_update_reg(struct usb_serial *serial, u8 reg, u8 mask, u8 val)
 271 {
 272         struct pl2303_serial_private *spriv = usb_get_serial_data(serial);
 273         int ret = 0;
 274         u8 *buf;
 275
 276         buf = kmalloc(1, GFP_KERNEL);
 277         if (!buf)
 278                 return -ENOMEM;
 279
 280         if (spriv->type == &pl2303_type_data[TYPE_HXN])
 281                 ret = pl2303_vendor_read(serial, reg, buf);
 282         else
 283                 ret = pl2303_vendor_read(serial, reg | 0x80, buf);
 284
 285         if (ret)
 286                 goto out_free;
 287
 288         *buf &= ~mask;
 289         *buf |= val & mask;
 290
 291         ret = pl2303_vendor_write(serial, reg, *buf);
 292 out_free:
 293         kfree(buf);
 294
 295         return ret;
 296 }
 297
 298 static int pl2303_probe(struct usb_serial *serial,
 299                                         const struct usb_device_id *id)
 300 {
 301         usb_set_serial_data(serial, (void *)id->driver_info);
 302
 303         return 0;
 304 }
 305
 306 /*
 307  * Use interrupt endpoint from first interface if available.
 308  *
 309  * This is needed due to the looney way its endpoints are set up.
 310  */
 311 static int pl2303_endpoint_hack(struct usb_serial *serial,
 312                                         struct usb_serial_endpoints *epds)
 313 {
 314         struct usb_interface *interface = serial->interface;
 315         struct usb_device *dev = serial->dev;
 316         struct device *ddev = &interface->dev;
 317         struct usb_host_interface *iface_desc;
 318         struct usb_endpoint_descriptor *endpoint;
 319         unsigned int i;
 320
 321         if (interface == dev->actconfig->interface[0])
 322                 return 0;
 323
 324         /* check out the endpoints of the other interface */
 325         iface_desc = dev->actconfig->interface[0]->cur_altsetting;
 326
 327         for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) {
 328                 endpoint = &iface_desc->endpoint[i].desc;
 329
 330                 if (!usb_endpoint_is_int_in(endpoint))
 331                         continue;
 332
 333                 dev_dbg(ddev, "found interrupt in on separate interface\n");
 334                 if (epds->num_interrupt_in < ARRAY_SIZE(epds->interrupt_in))
 335                         epds->interrupt_in[epds->num_interrupt_in++] = endpoint;
 336         }
 337
 338         return 0;
 339 }
 340
 341 static int pl2303_calc_num_ports(struct usb_serial *serial,
 342                                         struct usb_serial_endpoints *epds)
 343 {
 344         unsigned long quirks = (unsigned long)usb_get_serial_data(serial);
 345         struct device *dev = &serial->interface->dev;
 346         int ret;
 347
 348         if (quirks & PL2303_QUIRK_ENDPOINT_HACK) {
 349                 ret = pl2303_endpoint_hack(serial, epds);
 350                 if (ret)
 351                         return ret;
 352         }
 353
 354         if (epds->num_interrupt_in < 1) {
 355                 dev_err(dev, "required interrupt-in endpoint missing\n");
 356                 return -ENODEV;
 357         }
 358
 359         return 1;
 360 }
 361
 362 static int pl2303_startup(struct usb_serial *serial)
 363 {
 364         struct pl2303_serial_private *spriv;
 365         enum pl2303_type type = TYPE_01;
 366         unsigned char *buf;
 367         int res;
 368
 369         spriv = kzalloc(sizeof(*spriv), GFP_KERNEL);
 370         if (!spriv)
 371                 return -ENOMEM;
 372
 373         buf = kmalloc(1, GFP_KERNEL);
 374         if (!buf) {
 375                 kfree(spriv);
 376                 return -ENOMEM;
 377         }
 378
 379         if (serial->dev->descriptor.bDeviceClass == 0x02)
 380                 type = TYPE_01;         /* type 0 */
 381         else if (serial->dev->descriptor.bMaxPacketSize0 == 0x40)
 382                 type = TYPE_HX;
 383         else if (serial->dev->descriptor.bDeviceClass == 0x00)
 384                 type = TYPE_01;         /* type 1 */
 385         else if (serial->dev->descriptor.bDeviceClass == 0xFF)
 386                 type = TYPE_01;         /* type 1 */
 387         dev_dbg(&serial->interface->dev, "device type: %d\n", type);
 388
 389         if (type == TYPE_HX) {
 390                 res = usb_control_msg(serial->dev,
 391                                 usb_rcvctrlpipe(serial->dev, 0),
 392                                 VENDOR_READ_REQUEST, VENDOR_READ_REQUEST_TYPE,
 393                                 PL2303_READ_TYPE_HX_STATUS, 0, buf, 1, 100);
 394                 if (res != 1)
 395                         type = TYPE_HXN;
 396         }
 397
 398         spriv->type = &pl2303_type_data[type];
 399         spriv->quirks = (unsigned long)usb_get_serial_data(serial);
 400         spriv->quirks |= spriv->type->quirks;
 401
 402         usb_set_serial_data(serial, spriv);
 403
 404         if (type != TYPE_HXN) {
 405                 pl2303_vendor_read(serial, 0x8484, buf);
 406                 pl2303_vendor_write(serial, 0x0404, 0);
 407                 pl2303_vendor_read(serial, 0x8484, buf);
 408                 pl2303_vendor_read(serial, 0x8383, buf);
 409                 pl2303_vendor_read(serial, 0x8484, buf);
 410                 pl2303_vendor_write(serial, 0x0404, 1);
 411                 pl2303_vendor_read(serial, 0x8484, buf);
 412                 pl2303_vendor_read(serial, 0x8383, buf);
 413                 pl2303_vendor_write(serial, 0, 1);
 414                 pl2303_vendor_write(serial, 1, 0);
 415                 if (spriv->quirks & PL2303_QUIRK_LEGACY)
 416                         pl2303_vendor_write(serial, 2, 0x24);
 417                 else
 418                         pl2303_vendor_write(serial, 2, 0x44);
 419         }
 420
 421         kfree(buf);
 422
 423         return 0;
 424 }
 425
 426 static void pl2303_release(struct usb_serial *serial)
 427 {
 428         struct pl2303_serial_private *spriv = usb_get_serial_data(serial);
 429
 430         kfree(spriv);
 431 }
 432
 433 static int pl2303_port_probe(struct usb_serial_port *port)
 434 {
 435         struct pl2303_private *priv;
 436
 437         priv = kzalloc(sizeof(*priv), GFP_KERNEL);
 438         if (!priv)
 439                 return -ENOMEM;
 440
 441         spin_lock_init(&priv->lock);
 442
 443         usb_set_serial_port_data(port, priv);
 444
 445         port->port.drain_delay = 256;
 446
 447         return 0;
 448 }
 449
 450 static int pl2303_port_remove(struct usb_serial_port *port)
 451 {
 452         struct pl2303_private *priv = usb_get_serial_port_data(port);
 453
 454         kfree(priv);
 455
 456         return 0;
 457 }
 458
 459 static int pl2303_set_control_lines(struct usb_serial_port *port, u8 value)
 460 {
 461         struct usb_device *dev = port->serial->dev;
 462         int retval;
 463
 464         dev_dbg(&port->dev, "%s - %02x\n", __func__, value);
 465
 466         retval = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
 467                                  SET_CONTROL_REQUEST, SET_CONTROL_REQUEST_TYPE,
 468                                  value, 0, NULL, 0, 100);
 469         if (retval)
 470                 dev_err(&port->dev, "%s - failed: %d\n", __func__, retval);
 471
 472         return retval;
 473 }
 474
 475 /*
 476  * Returns the nearest supported baud rate that can be set directly without
 477  * using divisors.
 478  */
 479 static speed_t pl2303_get_supported_baud_rate(speed_t baud)
 480 {
 481         static const speed_t baud_sup[] = {
 482                 75, 150, 300, 600, 1200, 1800, 2400, 3600, 4800, 7200, 9600,
 483                 14400, 19200, 28800, 38400, 57600, 115200, 230400, 460800,
 484                 614400, 921600, 1228800, 2457600, 3000000, 6000000
 485         };
 486
 487         unsigned i;
 488
 489         for (i = 0; i < ARRAY_SIZE(baud_sup); ++i) {
 490                 if (baud_sup[i] > baud)
 491                         break;
 492         }
 493
 494         if (i == ARRAY_SIZE(baud_sup))
 495                 baud = baud_sup[i - 1];
 496         else if (i > 0 && (baud_sup[i] - baud) > (baud - baud_sup[i - 1]))
 497                 baud = baud_sup[i - 1];
 498         else
 499                 baud = baud_sup[i];
 500
 501         return baud;
 502 }
 503
 504 /*
 505  * NOTE: If unsupported baud rates are set directly, the PL2303 seems to
 506  *       use 9600 baud.
 507  */
 508 static speed_t pl2303_encode_baud_rate_direct(unsigned char buf[4],
 509                                                                 speed_t baud)
 510 {
 511         put_unaligned_le32(baud, buf);
 512
 513         return baud;
 514 }
 515
 516 static speed_t pl2303_encode_baud_rate_divisor(unsigned char buf[4],
 517                                                                 speed_t baud)
 518 {
 519         unsigned int baseline, mantissa, exponent;
 520
 521         /*
 522          * Apparently the formula is:
 523          *   baudrate = 12M * 32 / (mantissa * 4^exponent)
 524          * where
 525          *   mantissa = buf[8:0]
 526          *   exponent = buf[11:9]
 527          */
 528         baseline = 12000000 * 32;
 529         mantissa = baseline / baud;
 530         if (mantissa == 0)
 531                 mantissa = 1;   /* Avoid dividing by zero if baud > 32*12M. */
 532         exponent = 0;
 533         while (mantissa >= 512) {
 534                 if (exponent < 7) {
 535                         mantissa >>= 2; /* divide by 4 */
 536                         exponent++;
 537                 } else {
 538                         /* Exponent is maxed. Trim mantissa and leave. */
 539                         mantissa = 511;
 540                         break;
 541                 }
 542         }
 543
 544         buf[3] = 0x80;
 545         buf[2] = 0;
 546         buf[1] = exponent << 1 | mantissa >> 8;
 547         buf[0] = mantissa & 0xff;
 548
 549         /* Calculate and return the exact baud rate. */
 550         baud = (baseline / mantissa) >> (exponent << 1);
 551
 552         return baud;
 553 }
 554
 555 static void pl2303_encode_baud_rate(struct tty_struct *tty,
 556                                         struct usb_serial_port *port,
 557                                         u8 buf[4])
 558 {
 559         struct usb_serial *serial = port->serial;
 560         struct pl2303_serial_private *spriv = usb_get_serial_data(serial);
 561         speed_t baud_sup;
 562         speed_t baud;
 563
 564         baud = tty_get_baud_rate(tty);
 565         dev_dbg(&port->dev, "baud requested = %u\n", baud);
 566         if (!baud)
 567                 return;
 568
 569         if (spriv->type->max_baud_rate)
 570                 baud = min_t(speed_t, baud, spriv->type->max_baud_rate);
 571         /*
 572          * Use direct method for supported baud rates, otherwise use divisors.
 573          */
 574         baud_sup = pl2303_get_supported_baud_rate(baud);
 575
 576         if (baud == baud_sup)
 577                 baud = pl2303_encode_baud_rate_direct(buf, baud);
 578         else
 579                 baud = pl2303_encode_baud_rate_divisor(buf, baud);
 580
 581         /* Save resulting baud rate */
 582         tty_encode_baud_rate(tty, baud, baud);
 583         dev_dbg(&port->dev, "baud set = %u\n", baud);
 584 }
 585
 586 static int pl2303_get_line_request(struct usb_serial_port *port,
 587                                                         unsigned char buf[7])
 588 {
 589         struct usb_device *udev = port->serial->dev;
 590         int ret;
 591
 592         ret = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
 593                                 GET_LINE_REQUEST, GET_LINE_REQUEST_TYPE,
 594                                 0, 0, buf, 7, 100);
 595         if (ret != 7) {
 596                 dev_err(&port->dev, "%s - failed: %d\n", __func__, ret);
 597
 598                 if (ret >= 0)
 599                         ret = -EIO;
 600
 601                 return ret;
 602         }
 603
 604         dev_dbg(&port->dev, "%s - %7ph\n", __func__, buf);
 605
 606         return 0;
 607 }
 608
 609 static int pl2303_set_line_request(struct usb_serial_port *port,
 610                                                         unsigned char buf[7])
 611 {
 612         struct usb_device *udev = port->serial->dev;
 613         int ret;
 614
 615         ret = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
 616                                 SET_LINE_REQUEST, SET_LINE_REQUEST_TYPE,
 617                                 0, 0, buf, 7, 100);
 618         if (ret < 0) {
 619                 dev_err(&port->dev, "%s - failed: %d\n", __func__, ret);
 620                 return ret;
 621         }
 622
 623         dev_dbg(&port->dev, "%s - %7ph\n", __func__, buf);
 624
 625         return 0;
 626 }
 627
 628 static bool pl2303_termios_change(const struct ktermios *a, const struct ktermios *b)
 629 {
 630         bool ixon_change;
 631
 632         ixon_change = ((a->c_iflag ^ b->c_iflag) & (IXON | IXANY)) ||
 633                         a->c_cc[VSTART] != b->c_cc[VSTART] ||
 634                         a->c_cc[VSTOP] != b->c_cc[VSTOP];
 635
 636         return tty_termios_hw_change(a, b) || ixon_change;
 637 }
 638
 639 static bool pl2303_enable_xonxoff(struct tty_struct *tty, const struct pl2303_type_data *type)
 640 {
 641         if (!I_IXON(tty) || I_IXANY(tty))
 642                 return false;
 643
 644         if (START_CHAR(tty) != 0x11 || STOP_CHAR(tty) != 0x13)
 645                 return false;
 646
 647         if (type->no_autoxonxoff)
 648                 return false;
 649
 650         return true;
 651 }
 652
 653 static void pl2303_set_termios(struct tty_struct *tty,
 654                 struct usb_serial_port *port, struct ktermios *old_termios)
 655 {
 656         struct usb_serial *serial = port->serial;
 657         struct pl2303_serial_private *spriv = usb_get_serial_data(serial);
 658         struct pl2303_private *priv = usb_get_serial_port_data(port);
 659         unsigned long flags;
 660         unsigned char *buf;
 661         int ret;
 662         u8 control;
 663
 664         if (old_termios && !pl2303_termios_change(&tty->termios, old_termios))
 665                 return;
 666
 667         buf = kzalloc(7, GFP_KERNEL);
 668         if (!buf) {
 669                 /* Report back no change occurred */
 670                 if (old_termios)
 671                         tty->termios = *old_termios;
 672                 return;
 673         }
 674
 675         pl2303_get_line_request(port, buf);
 676
 677         switch (C_CSIZE(tty)) {
 678         case CS5:
 679                 buf[6] = 5;
 680                 break;
 681         case CS6:
 682                 buf[6] = 6;
 683                 break;
 684         case CS7:
 685                 buf[6] = 7;
 686                 break;
 687         default:
 688         case CS8:
 689                 buf[6] = 8;
 690         }
 691         dev_dbg(&port->dev, "data bits = %d\n", buf[6]);
 692
 693         /* For reference buf[0]:buf[3] baud rate value */
 694         pl2303_encode_baud_rate(tty, port, &buf[0]);
 695
 696         /* For reference buf[4]=0 is 1 stop bits */
 697         /* For reference buf[4]=1 is 1.5 stop bits */
 698         /* For reference buf[4]=2 is 2 stop bits */
 699         if (C_CSTOPB(tty)) {
 700                 /*
 701                  * NOTE: Comply with "real" UARTs / RS232:
 702                  *       use 1.5 instead of 2 stop bits with 5 data bits
 703                  */
 704                 if (C_CSIZE(tty) == CS5) {
 705                         buf[4] = 1;
 706                         dev_dbg(&port->dev, "stop bits = 1.5\n");
 707                 } else {
 708                         buf[4] = 2;
 709                         dev_dbg(&port->dev, "stop bits = 2\n");
 710                 }
 711         } else {
 712                 buf[4] = 0;
 713                 dev_dbg(&port->dev, "stop bits = 1\n");
 714         }
 715
 716         if (C_PARENB(tty)) {
 717                 /* For reference buf[5]=0 is none parity */
 718                 /* For reference buf[5]=1 is odd parity */
 719                 /* For reference buf[5]=2 is even parity */
 720                 /* For reference buf[5]=3 is mark parity */
 721                 /* For reference buf[5]=4 is space parity */
 722                 if (C_PARODD(tty)) {
 723                         if (C_CMSPAR(tty)) {
 724                                 buf[5] = 3;
 725                                 dev_dbg(&port->dev, "parity = mark\n");
 726                         } else {
 727                                 buf[5] = 1;
 728                                 dev_dbg(&port->dev, "parity = odd\n");
 729                         }
 730                 } else {
 731                         if (C_CMSPAR(tty)) {
 732                                 buf[5] = 4;
 733                                 dev_dbg(&port->dev, "parity = space\n");
 734                         } else {
 735                                 buf[5] = 2;
 736                                 dev_dbg(&port->dev, "parity = even\n");
 737                         }
 738                 }
 739         } else {
 740                 buf[5] = 0;
 741                 dev_dbg(&port->dev, "parity = none\n");
 742         }
 743
 744         /*
 745          * Some PL2303 are known to lose bytes if you change serial settings
 746          * even to the same values as before. Thus we actually need to filter
 747          * in this specific case.
 748          *
 749          * Note that the tty_termios_hw_change check above is not sufficient
 750          * as a previously requested baud rate may differ from the one
 751          * actually used (and stored in old_termios).
 752          *
 753          * NOTE: No additional locking needed for line_settings as it is
 754          *       only used in set_termios, which is serialised against itself.
 755          */
 756         if (!old_termios || memcmp(buf, priv->line_settings, 7)) {
 757                 ret = pl2303_set_line_request(port, buf);
 758                 if (!ret)
 759                         memcpy(priv->line_settings, buf, 7);
 760         }
 761
 762         /* change control lines if we are switching to or from B0 */
 763         spin_lock_irqsave(&priv->lock, flags);
 764         control = priv->line_control;
 765         if (C_BAUD(tty) == B0)
 766                 priv->line_control &= ~(CONTROL_DTR | CONTROL_RTS);
 767         else if (old_termios && (old_termios->c_cflag & CBAUD) == B0)
 768                 priv->line_control |= (CONTROL_DTR | CONTROL_RTS);
 769         if (control != priv->line_control) {
 770                 control = priv->line_control;
 771                 spin_unlock_irqrestore(&priv->lock, flags);
 772                 pl2303_set_control_lines(port, control);
 773         } else {
 774                 spin_unlock_irqrestore(&priv->lock, flags);
 775         }
 776
 777         if (C_CRTSCTS(tty)) {
 778                 if (spriv->quirks & PL2303_QUIRK_LEGACY) {
 779                         pl2303_update_reg(serial, 0, PL2303_FLOWCTRL_MASK, 0x40);
 780                 } else if (spriv->type == &pl2303_type_data[TYPE_HXN]) {
 781                         pl2303_update_reg(serial, PL2303_HXN_FLOWCTRL_REG,
 782                                         PL2303_HXN_FLOWCTRL_MASK,
 783                                         PL2303_HXN_FLOWCTRL_RTS_CTS);
 784                 } else {
 785                         pl2303_update_reg(serial, 0, PL2303_FLOWCTRL_MASK, 0x60);
 786                 }
 787         } else if (pl2303_enable_xonxoff(tty, spriv->type)) {
 788                 if (spriv->type == &pl2303_type_data[TYPE_HXN]) {
 789                         pl2303_update_reg(serial, PL2303_HXN_FLOWCTRL_REG,
 790                                         PL2303_HXN_FLOWCTRL_MASK,
 791                                         PL2303_HXN_FLOWCTRL_XON_XOFF);
 792                 } else {
 793                         pl2303_update_reg(serial, 0, PL2303_FLOWCTRL_MASK, 0xc0);
 794                 }
 795         } else {
 796                 if (spriv->type == &pl2303_type_data[TYPE_HXN]) {
 797                         pl2303_update_reg(serial, PL2303_HXN_FLOWCTRL_REG,
 798                                         PL2303_HXN_FLOWCTRL_MASK,
 799                                         PL2303_HXN_FLOWCTRL_NONE);
 800                 } else {
 801                         pl2303_update_reg(serial, 0, PL2303_FLOWCTRL_MASK, 0);
 802                 }
 803         }
 804
 805         kfree(buf);
 806 }
 807
 808 static void pl2303_dtr_rts(struct usb_serial_port *port, int on)
 809 {
 810         struct pl2303_private *priv = usb_get_serial_port_data(port);
 811         unsigned long flags;
 812         u8 control;
 813
 814         spin_lock_irqsave(&priv->lock, flags);
 815         if (on)
 816                 priv->line_control |= (CONTROL_DTR | CONTROL_RTS);
 817         else
 818                 priv->line_control &= ~(CONTROL_DTR | CONTROL_RTS);
 819         control = priv->line_control;
 820         spin_unlock_irqrestore(&priv->lock, flags);
 821
 822         pl2303_set_control_lines(port, control);
 823 }
 824
 825 static void pl2303_close(struct usb_serial_port *port)
 826 {
 827         usb_serial_generic_close(port);
 828         usb_kill_urb(port->interrupt_in_urb);
 829         pl2303_set_break(port, false);
 830 }
 831
 832 static int pl2303_open(struct tty_struct *tty, struct usb_serial_port *port)
 833 {
 834         struct usb_serial *serial = port->serial;
 835         struct pl2303_serial_private *spriv = usb_get_serial_data(serial);
 836         int result;
 837
 838         if (spriv->quirks & PL2303_QUIRK_LEGACY) {
 839                 usb_clear_halt(serial->dev, port->write_urb->pipe);
 840                 usb_clear_halt(serial->dev, port->read_urb->pipe);
 841         } else {
 842                 /* reset upstream data pipes */
 843                 if (spriv->type == &pl2303_type_data[TYPE_HXN]) {
 844                         pl2303_vendor_write(serial, PL2303_HXN_RESET_REG,
 845                                         PL2303_HXN_RESET_UPSTREAM_PIPE |
 846                                         PL2303_HXN_RESET_DOWNSTREAM_PIPE);
 847                 } else {
 848                         pl2303_vendor_write(serial, 8, 0);
 849                         pl2303_vendor_write(serial, 9, 0);
 850                 }
 851         }
 852
 853         /* Setup termios */
 854         if (tty)
 855                 pl2303_set_termios(tty, port, NULL);
 856
 857         result = usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL);
 858         if (result) {
 859                 dev_err(&port->dev, "failed to submit interrupt urb: %d\n",
 860                         result);
 861                 return result;
 862         }
 863
 864         result = usb_serial_generic_open(tty, port);
 865         if (result) {
 866                 usb_kill_urb(port->interrupt_in_urb);
 867                 return result;
 868         }
 869
 870         return 0;
 871 }
 872
 873 static int pl2303_tiocmset(struct tty_struct *tty,
 874                            unsigned int set, unsigned int clear)
 875 {
 876         struct usb_serial_port *port = tty->driver_data;
 877         struct pl2303_private *priv = usb_get_serial_port_data(port);
 878         unsigned long flags;
 879         u8 control;
 880         int ret;
 881
 882         spin_lock_irqsave(&priv->lock, flags);
 883         if (set & TIOCM_RTS)
 884                 priv->line_control |= CONTROL_RTS;
 885         if (set & TIOCM_DTR)
 886                 priv->line_control |= CONTROL_DTR;
 887         if (clear & TIOCM_RTS)
 888                 priv->line_control &= ~CONTROL_RTS;
 889         if (clear & TIOCM_DTR)
 890                 priv->line_control &= ~CONTROL_DTR;
 891         control = priv->line_control;
 892         spin_unlock_irqrestore(&priv->lock, flags);
 893
 894         ret = pl2303_set_control_lines(port, control);
 895         if (ret)
 896                 return usb_translate_errors(ret);
 897
 898         return 0;
 899 }
 900
 901 static int pl2303_tiocmget(struct tty_struct *tty)
 902 {
 903         struct usb_serial_port *port = tty->driver_data;
 904         struct pl2303_private *priv = usb_get_serial_port_data(port);
 905         unsigned long flags;
 906         unsigned int mcr;
 907         unsigned int status;
 908         unsigned int result;
 909
 910         spin_lock_irqsave(&priv->lock, flags);
 911         mcr = priv->line_control;
 912         status = priv->line_status;
 913         spin_unlock_irqrestore(&priv->lock, flags);
 914
 915         result = ((mcr & CONTROL_DTR)           ? TIOCM_DTR : 0)
 916                   | ((mcr & CONTROL_RTS)        ? TIOCM_RTS : 0)
 917                   | ((status & UART_CTS)        ? TIOCM_CTS : 0)
 918                   | ((status & UART_DSR)        ? TIOCM_DSR : 0)
 919                   | ((status & UART_RING)       ? TIOCM_RI  : 0)
 920                   | ((status & UART_DCD)        ? TIOCM_CD  : 0);
 921
 922         dev_dbg(&port->dev, "%s - result = %x\n", __func__, result);
 923
 924         return result;
 925 }
 926
 927 static int pl2303_carrier_raised(struct usb_serial_port *port)
 928 {
 929         struct pl2303_private *priv = usb_get_serial_port_data(port);
 930
 931         if (priv->line_status & UART_DCD)
 932                 return 1;
 933
 934         return 0;
 935 }
 936
 937 static int pl2303_get_serial(struct tty_struct *tty,
 938                         struct serial_struct *ss)
 939 {
 940         struct usb_serial_port *port = tty->driver_data;
 941
 942         ss->type = PORT_16654;
 943         ss->line = port->minor;
 944         ss->port = port->port_number;
 945         ss->baud_base = 460800;
 946         return 0;
 947 }
 948
 949 static void pl2303_set_break(struct usb_serial_port *port, bool enable)
 950 {
 951         struct usb_serial *serial = port->serial;
 952         u16 state;
 953         int result;
 954
 955         if (enable)
 956                 state = BREAK_ON;
 957         else
 958                 state = BREAK_OFF;
 959
 960         dev_dbg(&port->dev, "%s - turning break %s\n", __func__,
 961                         state == BREAK_OFF ? "off" : "on");
 962
 963         result = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
 964                                  BREAK_REQUEST, BREAK_REQUEST_TYPE, state,
 965                                  0, NULL, 0, 100);
 966         if (result)
 967                 dev_err(&port->dev, "error sending break = %d\n", result);
 968 }
 969
 970 static void pl2303_break_ctl(struct tty_struct *tty, int state)
 971 {
 972         struct usb_serial_port *port = tty->driver_data;
 973
 974         pl2303_set_break(port, state);
 975 }
 976
 977 static void pl2303_update_line_status(struct usb_serial_port *port,
 978                                       unsigned char *data,
 979                                       unsigned int actual_length)
 980 {
 981         struct usb_serial *serial = port->serial;
 982         struct pl2303_serial_private *spriv = usb_get_serial_data(serial);
 983         struct pl2303_private *priv = usb_get_serial_port_data(port);
 984         struct tty_struct *tty;
 985         unsigned long flags;
 986         unsigned int status_idx = UART_STATE_INDEX;
 987         u8 status;
 988         u8 delta;
 989
 990         if (spriv->quirks & PL2303_QUIRK_UART_STATE_IDX0)
 991                 status_idx = 0;
 992
 993         if (actual_length < status_idx + 1)
 994                 return;
 995
 996         status = data[status_idx];
 997
 998         /* Save off the uart status for others to look at */
 999         spin_lock_irqsave(&priv->lock, flags);
1000         delta = priv->line_status ^ status;
1001         priv->line_status = status;
1002         spin_unlock_irqrestore(&priv->lock, flags);
1003
1004         if (status & UART_BREAK_ERROR)
1005                 usb_serial_handle_break(port);
1006
1007         if (delta & UART_STATE_MSR_MASK) {
1008                 if (delta & UART_CTS)
1009                         port->icount.cts++;
1010                 if (delta & UART_DSR)
1011                         port->icount.dsr++;
1012                 if (delta & UART_RING)
1013                         port->icount.rng++;
1014                 if (delta & UART_DCD) {
1015                         port->icount.dcd++;
1016                         tty = tty_port_tty_get(&port->port);
1017                         if (tty) {
1018                                 usb_serial_handle_dcd_change(port, tty,
1019                                                         status & UART_DCD);
1020                                 tty_kref_put(tty);
1021                         }
1022                 }
1023
1024                 wake_up_interruptible(&port->port.delta_msr_wait);
1025         }
1026 }
1027
1028 static void pl2303_read_int_callback(struct urb *urb)
1029 {
1030         struct usb_serial_port *port =  urb->context;
1031         unsigned char *data = urb->transfer_buffer;
1032         unsigned int actual_length = urb->actual_length;
1033         int status = urb->status;
1034         int retval;
1035
1036         switch (status) {
1037         case 0:
1038                 /* success */
1039                 break;
1040         case -ECONNRESET:
1041         case -ENOENT:
1042         case -ESHUTDOWN:
1043                 /* this urb is terminated, clean up */
1044                 dev_dbg(&port->dev, "%s - urb shutting down with status: %d\n",
1045                         __func__, status);
1046                 return;
1047         default:
1048                 dev_dbg(&port->dev, "%s - nonzero urb status received: %d\n",
1049                         __func__, status);
1050                 goto exit;
1051         }
1052
1053         usb_serial_debug_data(&port->dev, __func__,
1054                               urb->actual_length, urb->transfer_buffer);
1055
1056         pl2303_update_line_status(port, data, actual_length);
1057
1058 exit:
1059         retval = usb_submit_urb(urb, GFP_ATOMIC);
1060         if (retval) {
1061                 dev_err(&port->dev,
1062                         "%s - usb_submit_urb failed with result %d\n",
1063                         __func__, retval);
1064         }
1065 }
1066
1067 static void pl2303_process_read_urb(struct urb *urb)
1068 {
1069         struct usb_serial_port *port = urb->context;
1070         struct pl2303_private *priv = usb_get_serial_port_data(port);
1071         unsigned char *data = urb->transfer_buffer;
1072         char tty_flag = TTY_NORMAL;
1073         unsigned long flags;
1074         u8 line_status;
1075         int i;
1076
1077         /* update line status */
1078         spin_lock_irqsave(&priv->lock, flags);
1079         line_status = priv->line_status;
1080         priv->line_status &= ~UART_STATE_TRANSIENT_MASK;
1081         spin_unlock_irqrestore(&priv->lock, flags);
1082
1083         if (!urb->actual_length)
1084                 return;
1085
1086         /*
1087          * Break takes precedence over parity, which takes precedence over
1088          * framing errors.
1089          */
1090         if (line_status & UART_BREAK_ERROR)
1091                 tty_flag = TTY_BREAK;
1092         else if (line_status & UART_PARITY_ERROR)
1093                 tty_flag = TTY_PARITY;
1094         else if (line_status & UART_FRAME_ERROR)
1095                 tty_flag = TTY_FRAME;
1096
1097         if (tty_flag != TTY_NORMAL)
1098                 dev_dbg(&port->dev, "%s - tty_flag = %d\n", __func__,
1099                                                                 tty_flag);
1100         /* overrun is special, not associated with a char */
1101         if (line_status & UART_OVERRUN_ERROR)
1102                 tty_insert_flip_char(&port->port, 0, TTY_OVERRUN);
1103
1104         if (port->sysrq) {
1105                 for (i = 0; i < urb->actual_length; ++i)
1106                         if (!usb_serial_handle_sysrq_char(port, data[i]))
1107                                 tty_insert_flip_char(&port->port, data[i],
1108                                                 tty_flag);
1109         } else {
1110                 tty_insert_flip_string_fixed_flag(&port->port, data, tty_flag,
1111                                                         urb->actual_length);
1112         }
1113
1114         tty_flip_buffer_push(&port->port);
1115 }
1116
1117 static struct usb_serial_driver pl2303_device = {
1118         .driver = {
1119                 .owner =        THIS_MODULE,
1120                 .name =         "pl2303",
1121         },
1122         .id_table =             id_table,
1123         .num_bulk_in =          1,
1124         .num_bulk_out =         1,
1125         .num_interrupt_in =     0,      /* see pl2303_calc_num_ports */
1126         .bulk_in_size =         256,
1127         .bulk_out_size =        256,
1128         .open =                 pl2303_open,
1129         .close =                pl2303_close,
1130         .dtr_rts =              pl2303_dtr_rts,
1131         .carrier_raised =       pl2303_carrier_raised,
1132         .get_serial =           pl2303_get_serial,
1133         .break_ctl =            pl2303_break_ctl,
1134         .set_termios =          pl2303_set_termios,
1135         .tiocmget =             pl2303_tiocmget,
1136         .tiocmset =             pl2303_tiocmset,
1137         .tiocmiwait =           usb_serial_generic_tiocmiwait,
1138         .process_read_urb =     pl2303_process_read_urb,
1139         .read_int_callback =    pl2303_read_int_callback,
1140         .probe =                pl2303_probe,
1141         .calc_num_ports =       pl2303_calc_num_ports,
1142         .attach =               pl2303_startup,
1143         .release =              pl2303_release,
1144         .port_probe =           pl2303_port_probe,
1145         .port_remove =          pl2303_port_remove,
1146 };
1147
1148 static struct usb_serial_driver * const serial_drivers[] = {
1149         &pl2303_device, NULL
1150 };
1151
1152 module_usb_serial_driver(serial_drivers, id_table);
1153
1154 MODULE_DESCRIPTION("Prolific PL2303 USB to serial adaptor driver");
1155 MODULE_LICENSE("GPL v2");