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 (greg@kroah.com) 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(ADLINK_VENDOR_ID, ADLINK_ND6530GC_PRODUCT_ID) }, 117 { USB_DEVICE(SMART_VENDOR_ID, SMART_PRODUCT_ID) }, 118 { USB_DEVICE(AT_VENDOR_ID, AT_VTKIT3_PRODUCT_ID) }, 119 { } /* Terminating entry */ 120 }; 121 122 MODULE_DEVICE_TABLE(usb, id_table); 123 124 #define SET_LINE_REQUEST_TYPE 0x21 125 #define SET_LINE_REQUEST 0x20 126 127 #define SET_CONTROL_REQUEST_TYPE 0x21 128 #define SET_CONTROL_REQUEST 0x22 129 #define CONTROL_DTR 0x01 130 #define CONTROL_RTS 0x02 131 132 #define BREAK_REQUEST_TYPE 0x21 133 #define BREAK_REQUEST 0x23 134 #define BREAK_ON 0xffff 135 #define BREAK_OFF 0x0000 136 137 #define GET_LINE_REQUEST_TYPE 0xa1 138 #define GET_LINE_REQUEST 0x21 139 140 #define VENDOR_WRITE_REQUEST_TYPE 0x40 141 #define VENDOR_WRITE_REQUEST 0x01 142 #define VENDOR_WRITE_NREQUEST 0x80 143 144 #define VENDOR_READ_REQUEST_TYPE 0xc0 145 #define VENDOR_READ_REQUEST 0x01 146 #define VENDOR_READ_NREQUEST 0x81 147 148 #define UART_STATE_INDEX 8 149 #define UART_STATE_MSR_MASK 0x8b 150 #define UART_STATE_TRANSIENT_MASK 0x74 151 #define UART_DCD 0x01 152 #define UART_DSR 0x02 153 #define UART_BREAK_ERROR 0x04 154 #define UART_RING 0x08 155 #define UART_FRAME_ERROR 0x10 156 #define UART_PARITY_ERROR 0x20 157 #define UART_OVERRUN_ERROR 0x40 158 #define UART_CTS 0x80 159 160 #define PL2303_FLOWCTRL_MASK 0xf0 161 162 #define PL2303_READ_TYPE_HX_STATUS 0x8080 163 164 #define PL2303_HXN_RESET_REG 0x07 165 #define PL2303_HXN_RESET_UPSTREAM_PIPE 0x02 166 #define PL2303_HXN_RESET_DOWNSTREAM_PIPE 0x01 167 168 #define PL2303_HXN_FLOWCTRL_REG 0x0a 169 #define PL2303_HXN_FLOWCTRL_MASK 0x1c 170 #define PL2303_HXN_FLOWCTRL_NONE 0x1c 171 #define PL2303_HXN_FLOWCTRL_RTS_CTS 0x18 172 #define PL2303_HXN_FLOWCTRL_XON_XOFF 0x0c 173 174 static void pl2303_set_break(struct usb_serial_port *port, bool enable); 175 176 enum pl2303_type { 177 TYPE_H, 178 TYPE_HX, 179 TYPE_TA, 180 TYPE_TB, 181 TYPE_HXD, 182 TYPE_HXN, 183 TYPE_COUNT 184 }; 185 186 struct pl2303_type_data { 187 const char *name; 188 speed_t max_baud_rate; 189 unsigned long quirks; 190 unsigned int no_autoxonxoff:1; 191 unsigned int no_divisors:1; 192 unsigned int alt_divisors:1; 193 }; 194 195 struct pl2303_serial_private { 196 const struct pl2303_type_data *type; 197 unsigned long quirks; 198 }; 199 200 struct pl2303_private { 201 spinlock_t lock; 202 u8 line_control; 203 u8 line_status; 204 205 u8 line_settings[7]; 206 }; 207 208 static const struct pl2303_type_data pl2303_type_data[TYPE_COUNT] = { 209 [TYPE_H] = { 210 .name = "H", 211 .max_baud_rate = 1228800, 212 .quirks = PL2303_QUIRK_LEGACY, 213 .no_autoxonxoff = true, 214 }, 215 [TYPE_HX] = { 216 .name = "HX", 217 .max_baud_rate = 6000000, 218 }, 219 [TYPE_TA] = { 220 .name = "TA", 221 .max_baud_rate = 6000000, 222 .alt_divisors = true, 223 }, 224 [TYPE_TB] = { 225 .name = "TB", 226 .max_baud_rate = 12000000, 227 .alt_divisors = true, 228 }, 229 [TYPE_HXD] = { 230 .name = "HXD", 231 .max_baud_rate = 12000000, 232 }, 233 [TYPE_HXN] = { 234 .name = "G", 235 .max_baud_rate = 12000000, 236 .no_divisors = true, 237 }, 238 }; 239 240 static int pl2303_vendor_read(struct usb_serial *serial, u16 value, 241 unsigned char buf[1]) 242 { 243 struct pl2303_serial_private *spriv = usb_get_serial_data(serial); 244 struct device *dev = &serial->interface->dev; 245 u8 request; 246 int res; 247 248 if (spriv->type == &pl2303_type_data[TYPE_HXN]) 249 request = VENDOR_READ_NREQUEST; 250 else 251 request = VENDOR_READ_REQUEST; 252 253 res = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0), 254 request, VENDOR_READ_REQUEST_TYPE, 255 value, 0, buf, 1, 100); 256 if (res != 1) { 257 dev_err(dev, "%s - failed to read [%04x]: %d\n", __func__, 258 value, res); 259 if (res >= 0) 260 res = -EIO; 261 262 return res; 263 } 264 265 dev_dbg(dev, "%s - [%04x] = %02x\n", __func__, value, buf[0]); 266 267 return 0; 268 } 269 270 static int pl2303_vendor_write(struct usb_serial *serial, u16 value, u16 index) 271 { 272 struct pl2303_serial_private *spriv = usb_get_serial_data(serial); 273 struct device *dev = &serial->interface->dev; 274 u8 request; 275 int res; 276 277 dev_dbg(dev, "%s - [%04x] = %02x\n", __func__, value, index); 278 279 if (spriv->type == &pl2303_type_data[TYPE_HXN]) 280 request = VENDOR_WRITE_NREQUEST; 281 else 282 request = VENDOR_WRITE_REQUEST; 283 284 res = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), 285 request, VENDOR_WRITE_REQUEST_TYPE, 286 value, index, NULL, 0, 100); 287 if (res) { 288 dev_err(dev, "%s - failed to write [%04x]: %d\n", __func__, 289 value, res); 290 return res; 291 } 292 293 return 0; 294 } 295 296 static int pl2303_update_reg(struct usb_serial *serial, u8 reg, u8 mask, u8 val) 297 { 298 struct pl2303_serial_private *spriv = usb_get_serial_data(serial); 299 int ret = 0; 300 u8 *buf; 301 302 buf = kmalloc(1, GFP_KERNEL); 303 if (!buf) 304 return -ENOMEM; 305 306 if (spriv->type == &pl2303_type_data[TYPE_HXN]) 307 ret = pl2303_vendor_read(serial, reg, buf); 308 else 309 ret = pl2303_vendor_read(serial, reg | 0x80, buf); 310 311 if (ret) 312 goto out_free; 313 314 *buf &= ~mask; 315 *buf |= val & mask; 316 317 ret = pl2303_vendor_write(serial, reg, *buf); 318 out_free: 319 kfree(buf); 320 321 return ret; 322 } 323 324 static int pl2303_probe(struct usb_serial *serial, 325 const struct usb_device_id *id) 326 { 327 usb_set_serial_data(serial, (void *)id->driver_info); 328 329 return 0; 330 } 331 332 /* 333 * Use interrupt endpoint from first interface if available. 334 * 335 * This is needed due to the looney way its endpoints are set up. 336 */ 337 static int pl2303_endpoint_hack(struct usb_serial *serial, 338 struct usb_serial_endpoints *epds) 339 { 340 struct usb_interface *interface = serial->interface; 341 struct usb_device *dev = serial->dev; 342 struct device *ddev = &interface->dev; 343 struct usb_host_interface *iface_desc; 344 struct usb_endpoint_descriptor *endpoint; 345 unsigned int i; 346 347 if (interface == dev->actconfig->interface[0]) 348 return 0; 349 350 /* check out the endpoints of the other interface */ 351 iface_desc = dev->actconfig->interface[0]->cur_altsetting; 352 353 for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) { 354 endpoint = &iface_desc->endpoint[i].desc; 355 356 if (!usb_endpoint_is_int_in(endpoint)) 357 continue; 358 359 dev_dbg(ddev, "found interrupt in on separate interface\n"); 360 if (epds->num_interrupt_in < ARRAY_SIZE(epds->interrupt_in)) 361 epds->interrupt_in[epds->num_interrupt_in++] = endpoint; 362 } 363 364 return 0; 365 } 366 367 static int pl2303_calc_num_ports(struct usb_serial *serial, 368 struct usb_serial_endpoints *epds) 369 { 370 unsigned long quirks = (unsigned long)usb_get_serial_data(serial); 371 struct device *dev = &serial->interface->dev; 372 int ret; 373 374 if (quirks & PL2303_QUIRK_ENDPOINT_HACK) { 375 ret = pl2303_endpoint_hack(serial, epds); 376 if (ret) 377 return ret; 378 } 379 380 if (epds->num_interrupt_in < 1) { 381 dev_err(dev, "required interrupt-in endpoint missing\n"); 382 return -ENODEV; 383 } 384 385 return 1; 386 } 387 388 static bool pl2303_supports_hx_status(struct usb_serial *serial) 389 { 390 int ret; 391 u8 buf; 392 393 ret = usb_control_msg_recv(serial->dev, 0, VENDOR_READ_REQUEST, 394 VENDOR_READ_REQUEST_TYPE, PL2303_READ_TYPE_HX_STATUS, 395 0, &buf, 1, 100, GFP_KERNEL); 396 397 return ret == 0; 398 } 399 400 static int pl2303_detect_type(struct usb_serial *serial) 401 { 402 struct usb_device_descriptor *desc = &serial->dev->descriptor; 403 u16 bcdDevice, bcdUSB; 404 405 /* 406 * Legacy PL2303H, variants 0 and 1 (difference unknown). 407 */ 408 if (desc->bDeviceClass == 0x02) 409 return TYPE_H; /* variant 0 */ 410 411 if (desc->bMaxPacketSize0 != 0x40) { 412 if (desc->bDeviceClass == 0x00 || desc->bDeviceClass == 0xff) 413 return TYPE_H; /* variant 1 */ 414 415 return TYPE_H; /* variant 0 */ 416 } 417 418 bcdDevice = le16_to_cpu(desc->bcdDevice); 419 bcdUSB = le16_to_cpu(desc->bcdUSB); 420 421 switch (bcdDevice) { 422 case 0x100: 423 /* 424 * Assume it's an HXN-type if the device doesn't support the old read 425 * request value. 426 */ 427 if (bcdUSB == 0x200 && !pl2303_supports_hx_status(serial)) 428 return TYPE_HXN; 429 break; 430 case 0x300: 431 if (bcdUSB == 0x200) 432 return TYPE_TA; 433 434 return TYPE_HX; 435 case 0x400: 436 return TYPE_HXD; 437 case 0x500: 438 return TYPE_TB; 439 } 440 441 dev_err(&serial->interface->dev, 442 "unknown device type, please report to linux-usb@vger.kernel.org\n"); 443 return -ENODEV; 444 } 445 446 static int pl2303_startup(struct usb_serial *serial) 447 { 448 struct pl2303_serial_private *spriv; 449 enum pl2303_type type; 450 unsigned char *buf; 451 int ret; 452 453 ret = pl2303_detect_type(serial); 454 if (ret < 0) 455 return ret; 456 457 type = ret; 458 dev_dbg(&serial->interface->dev, "device type: %s\n", pl2303_type_data[type].name); 459 460 spriv = kzalloc(sizeof(*spriv), GFP_KERNEL); 461 if (!spriv) 462 return -ENOMEM; 463 464 spriv->type = &pl2303_type_data[type]; 465 spriv->quirks = (unsigned long)usb_get_serial_data(serial); 466 spriv->quirks |= spriv->type->quirks; 467 468 usb_set_serial_data(serial, spriv); 469 470 if (type != TYPE_HXN) { 471 buf = kmalloc(1, GFP_KERNEL); 472 if (!buf) { 473 kfree(spriv); 474 return -ENOMEM; 475 } 476 477 pl2303_vendor_read(serial, 0x8484, buf); 478 pl2303_vendor_write(serial, 0x0404, 0); 479 pl2303_vendor_read(serial, 0x8484, buf); 480 pl2303_vendor_read(serial, 0x8383, buf); 481 pl2303_vendor_read(serial, 0x8484, buf); 482 pl2303_vendor_write(serial, 0x0404, 1); 483 pl2303_vendor_read(serial, 0x8484, buf); 484 pl2303_vendor_read(serial, 0x8383, buf); 485 pl2303_vendor_write(serial, 0, 1); 486 pl2303_vendor_write(serial, 1, 0); 487 if (spriv->quirks & PL2303_QUIRK_LEGACY) 488 pl2303_vendor_write(serial, 2, 0x24); 489 else 490 pl2303_vendor_write(serial, 2, 0x44); 491 492 kfree(buf); 493 } 494 495 return 0; 496 } 497 498 static void pl2303_release(struct usb_serial *serial) 499 { 500 struct pl2303_serial_private *spriv = usb_get_serial_data(serial); 501 502 kfree(spriv); 503 } 504 505 static int pl2303_port_probe(struct usb_serial_port *port) 506 { 507 struct pl2303_private *priv; 508 509 priv = kzalloc(sizeof(*priv), GFP_KERNEL); 510 if (!priv) 511 return -ENOMEM; 512 513 spin_lock_init(&priv->lock); 514 515 usb_set_serial_port_data(port, priv); 516 517 port->port.drain_delay = 256; 518 519 return 0; 520 } 521 522 static void pl2303_port_remove(struct usb_serial_port *port) 523 { 524 struct pl2303_private *priv = usb_get_serial_port_data(port); 525 526 kfree(priv); 527 } 528 529 static int pl2303_set_control_lines(struct usb_serial_port *port, u8 value) 530 { 531 struct usb_device *dev = port->serial->dev; 532 int retval; 533 534 dev_dbg(&port->dev, "%s - %02x\n", __func__, value); 535 536 retval = usb_control_msg(dev, usb_sndctrlpipe(dev, 0), 537 SET_CONTROL_REQUEST, SET_CONTROL_REQUEST_TYPE, 538 value, 0, NULL, 0, 100); 539 if (retval) 540 dev_err(&port->dev, "%s - failed: %d\n", __func__, retval); 541 542 return retval; 543 } 544 545 /* 546 * Returns the nearest supported baud rate that can be set directly without 547 * using divisors. 548 */ 549 static speed_t pl2303_get_supported_baud_rate(speed_t baud) 550 { 551 static const speed_t baud_sup[] = { 552 75, 150, 300, 600, 1200, 1800, 2400, 3600, 4800, 7200, 9600, 553 14400, 19200, 28800, 38400, 57600, 115200, 230400, 460800, 554 614400, 921600, 1228800, 2457600, 3000000, 6000000 555 }; 556 557 unsigned i; 558 559 for (i = 0; i < ARRAY_SIZE(baud_sup); ++i) { 560 if (baud_sup[i] > baud) 561 break; 562 } 563 564 if (i == ARRAY_SIZE(baud_sup)) 565 baud = baud_sup[i - 1]; 566 else if (i > 0 && (baud_sup[i] - baud) > (baud - baud_sup[i - 1])) 567 baud = baud_sup[i - 1]; 568 else 569 baud = baud_sup[i]; 570 571 return baud; 572 } 573 574 /* 575 * NOTE: If unsupported baud rates are set directly, the PL2303 seems to 576 * use 9600 baud. 577 */ 578 static speed_t pl2303_encode_baud_rate_direct(unsigned char buf[4], 579 speed_t baud) 580 { 581 put_unaligned_le32(baud, buf); 582 583 return baud; 584 } 585 586 static speed_t pl2303_encode_baud_rate_divisor(unsigned char buf[4], 587 speed_t baud) 588 { 589 unsigned int baseline, mantissa, exponent; 590 591 /* 592 * Apparently the formula is: 593 * baudrate = 12M * 32 / (mantissa * 4^exponent) 594 * where 595 * mantissa = buf[8:0] 596 * exponent = buf[11:9] 597 */ 598 baseline = 12000000 * 32; 599 mantissa = baseline / baud; 600 if (mantissa == 0) 601 mantissa = 1; /* Avoid dividing by zero if baud > 32*12M. */ 602 exponent = 0; 603 while (mantissa >= 512) { 604 if (exponent < 7) { 605 mantissa >>= 2; /* divide by 4 */ 606 exponent++; 607 } else { 608 /* Exponent is maxed. Trim mantissa and leave. */ 609 mantissa = 511; 610 break; 611 } 612 } 613 614 buf[3] = 0x80; 615 buf[2] = 0; 616 buf[1] = exponent << 1 | mantissa >> 8; 617 buf[0] = mantissa & 0xff; 618 619 /* Calculate and return the exact baud rate. */ 620 baud = (baseline / mantissa) >> (exponent << 1); 621 622 return baud; 623 } 624 625 static speed_t pl2303_encode_baud_rate_divisor_alt(unsigned char buf[4], 626 speed_t baud) 627 { 628 unsigned int baseline, mantissa, exponent; 629 630 /* 631 * Apparently, for the TA version the formula is: 632 * baudrate = 12M * 32 / (mantissa * 2^exponent) 633 * where 634 * mantissa = buf[10:0] 635 * exponent = buf[15:13 16] 636 */ 637 baseline = 12000000 * 32; 638 mantissa = baseline / baud; 639 if (mantissa == 0) 640 mantissa = 1; /* Avoid dividing by zero if baud > 32*12M. */ 641 exponent = 0; 642 while (mantissa >= 2048) { 643 if (exponent < 15) { 644 mantissa >>= 1; /* divide by 2 */ 645 exponent++; 646 } else { 647 /* Exponent is maxed. Trim mantissa and leave. */ 648 mantissa = 2047; 649 break; 650 } 651 } 652 653 buf[3] = 0x80; 654 buf[2] = exponent & 0x01; 655 buf[1] = (exponent & ~0x01) << 4 | mantissa >> 8; 656 buf[0] = mantissa & 0xff; 657 658 /* Calculate and return the exact baud rate. */ 659 baud = (baseline / mantissa) >> exponent; 660 661 return baud; 662 } 663 664 static void pl2303_encode_baud_rate(struct tty_struct *tty, 665 struct usb_serial_port *port, 666 u8 buf[4]) 667 { 668 struct usb_serial *serial = port->serial; 669 struct pl2303_serial_private *spriv = usb_get_serial_data(serial); 670 speed_t baud_sup; 671 speed_t baud; 672 673 baud = tty_get_baud_rate(tty); 674 dev_dbg(&port->dev, "baud requested = %u\n", baud); 675 if (!baud) 676 return; 677 678 if (spriv->type->max_baud_rate) 679 baud = min_t(speed_t, baud, spriv->type->max_baud_rate); 680 /* 681 * Use direct method for supported baud rates, otherwise use divisors. 682 * Newer chip types do not support divisor encoding. 683 */ 684 if (spriv->type->no_divisors) 685 baud_sup = baud; 686 else 687 baud_sup = pl2303_get_supported_baud_rate(baud); 688 689 if (baud == baud_sup) 690 baud = pl2303_encode_baud_rate_direct(buf, baud); 691 else if (spriv->type->alt_divisors) 692 baud = pl2303_encode_baud_rate_divisor_alt(buf, baud); 693 else 694 baud = pl2303_encode_baud_rate_divisor(buf, baud); 695 696 /* Save resulting baud rate */ 697 tty_encode_baud_rate(tty, baud, baud); 698 dev_dbg(&port->dev, "baud set = %u\n", baud); 699 } 700 701 static int pl2303_get_line_request(struct usb_serial_port *port, 702 unsigned char buf[7]) 703 { 704 struct usb_device *udev = port->serial->dev; 705 int ret; 706 707 ret = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0), 708 GET_LINE_REQUEST, GET_LINE_REQUEST_TYPE, 709 0, 0, buf, 7, 100); 710 if (ret != 7) { 711 dev_err(&port->dev, "%s - failed: %d\n", __func__, ret); 712 713 if (ret >= 0) 714 ret = -EIO; 715 716 return ret; 717 } 718 719 dev_dbg(&port->dev, "%s - %7ph\n", __func__, buf); 720 721 return 0; 722 } 723 724 static int pl2303_set_line_request(struct usb_serial_port *port, 725 unsigned char buf[7]) 726 { 727 struct usb_device *udev = port->serial->dev; 728 int ret; 729 730 ret = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), 731 SET_LINE_REQUEST, SET_LINE_REQUEST_TYPE, 732 0, 0, buf, 7, 100); 733 if (ret < 0) { 734 dev_err(&port->dev, "%s - failed: %d\n", __func__, ret); 735 return ret; 736 } 737 738 dev_dbg(&port->dev, "%s - %7ph\n", __func__, buf); 739 740 return 0; 741 } 742 743 static bool pl2303_termios_change(const struct ktermios *a, const struct ktermios *b) 744 { 745 bool ixon_change; 746 747 ixon_change = ((a->c_iflag ^ b->c_iflag) & (IXON | IXANY)) || 748 a->c_cc[VSTART] != b->c_cc[VSTART] || 749 a->c_cc[VSTOP] != b->c_cc[VSTOP]; 750 751 return tty_termios_hw_change(a, b) || ixon_change; 752 } 753 754 static bool pl2303_enable_xonxoff(struct tty_struct *tty, const struct pl2303_type_data *type) 755 { 756 if (!I_IXON(tty) || I_IXANY(tty)) 757 return false; 758 759 if (START_CHAR(tty) != 0x11 || STOP_CHAR(tty) != 0x13) 760 return false; 761 762 if (type->no_autoxonxoff) 763 return false; 764 765 return true; 766 } 767 768 static void pl2303_set_termios(struct tty_struct *tty, 769 struct usb_serial_port *port, struct ktermios *old_termios) 770 { 771 struct usb_serial *serial = port->serial; 772 struct pl2303_serial_private *spriv = usb_get_serial_data(serial); 773 struct pl2303_private *priv = usb_get_serial_port_data(port); 774 unsigned long flags; 775 unsigned char *buf; 776 int ret; 777 u8 control; 778 779 if (old_termios && !pl2303_termios_change(&tty->termios, old_termios)) 780 return; 781 782 buf = kzalloc(7, GFP_KERNEL); 783 if (!buf) { 784 /* Report back no change occurred */ 785 if (old_termios) 786 tty->termios = *old_termios; 787 return; 788 } 789 790 pl2303_get_line_request(port, buf); 791 792 buf[6] = tty_get_char_size(tty->termios.c_cflag); 793 dev_dbg(&port->dev, "data bits = %d\n", buf[6]); 794 795 /* For reference buf[0]:buf[3] baud rate value */ 796 pl2303_encode_baud_rate(tty, port, &buf[0]); 797 798 /* For reference buf[4]=0 is 1 stop bits */ 799 /* For reference buf[4]=1 is 1.5 stop bits */ 800 /* For reference buf[4]=2 is 2 stop bits */ 801 if (C_CSTOPB(tty)) { 802 /* 803 * NOTE: Comply with "real" UARTs / RS232: 804 * use 1.5 instead of 2 stop bits with 5 data bits 805 */ 806 if (C_CSIZE(tty) == CS5) { 807 buf[4] = 1; 808 dev_dbg(&port->dev, "stop bits = 1.5\n"); 809 } else { 810 buf[4] = 2; 811 dev_dbg(&port->dev, "stop bits = 2\n"); 812 } 813 } else { 814 buf[4] = 0; 815 dev_dbg(&port->dev, "stop bits = 1\n"); 816 } 817 818 if (C_PARENB(tty)) { 819 /* For reference buf[5]=0 is none parity */ 820 /* For reference buf[5]=1 is odd parity */ 821 /* For reference buf[5]=2 is even parity */ 822 /* For reference buf[5]=3 is mark parity */ 823 /* For reference buf[5]=4 is space parity */ 824 if (C_PARODD(tty)) { 825 if (C_CMSPAR(tty)) { 826 buf[5] = 3; 827 dev_dbg(&port->dev, "parity = mark\n"); 828 } else { 829 buf[5] = 1; 830 dev_dbg(&port->dev, "parity = odd\n"); 831 } 832 } else { 833 if (C_CMSPAR(tty)) { 834 buf[5] = 4; 835 dev_dbg(&port->dev, "parity = space\n"); 836 } else { 837 buf[5] = 2; 838 dev_dbg(&port->dev, "parity = even\n"); 839 } 840 } 841 } else { 842 buf[5] = 0; 843 dev_dbg(&port->dev, "parity = none\n"); 844 } 845 846 /* 847 * Some PL2303 are known to lose bytes if you change serial settings 848 * even to the same values as before. Thus we actually need to filter 849 * in this specific case. 850 * 851 * Note that the tty_termios_hw_change check above is not sufficient 852 * as a previously requested baud rate may differ from the one 853 * actually used (and stored in old_termios). 854 * 855 * NOTE: No additional locking needed for line_settings as it is 856 * only used in set_termios, which is serialised against itself. 857 */ 858 if (!old_termios || memcmp(buf, priv->line_settings, 7)) { 859 ret = pl2303_set_line_request(port, buf); 860 if (!ret) 861 memcpy(priv->line_settings, buf, 7); 862 } 863 864 /* change control lines if we are switching to or from B0 */ 865 spin_lock_irqsave(&priv->lock, flags); 866 control = priv->line_control; 867 if (C_BAUD(tty) == B0) 868 priv->line_control &= ~(CONTROL_DTR | CONTROL_RTS); 869 else if (old_termios && (old_termios->c_cflag & CBAUD) == B0) 870 priv->line_control |= (CONTROL_DTR | CONTROL_RTS); 871 if (control != priv->line_control) { 872 control = priv->line_control; 873 spin_unlock_irqrestore(&priv->lock, flags); 874 pl2303_set_control_lines(port, control); 875 } else { 876 spin_unlock_irqrestore(&priv->lock, flags); 877 } 878 879 if (C_CRTSCTS(tty)) { 880 if (spriv->quirks & PL2303_QUIRK_LEGACY) { 881 pl2303_update_reg(serial, 0, PL2303_FLOWCTRL_MASK, 0x40); 882 } else if (spriv->type == &pl2303_type_data[TYPE_HXN]) { 883 pl2303_update_reg(serial, PL2303_HXN_FLOWCTRL_REG, 884 PL2303_HXN_FLOWCTRL_MASK, 885 PL2303_HXN_FLOWCTRL_RTS_CTS); 886 } else { 887 pl2303_update_reg(serial, 0, PL2303_FLOWCTRL_MASK, 0x60); 888 } 889 } else if (pl2303_enable_xonxoff(tty, spriv->type)) { 890 if (spriv->type == &pl2303_type_data[TYPE_HXN]) { 891 pl2303_update_reg(serial, PL2303_HXN_FLOWCTRL_REG, 892 PL2303_HXN_FLOWCTRL_MASK, 893 PL2303_HXN_FLOWCTRL_XON_XOFF); 894 } else { 895 pl2303_update_reg(serial, 0, PL2303_FLOWCTRL_MASK, 0xc0); 896 } 897 } else { 898 if (spriv->type == &pl2303_type_data[TYPE_HXN]) { 899 pl2303_update_reg(serial, PL2303_HXN_FLOWCTRL_REG, 900 PL2303_HXN_FLOWCTRL_MASK, 901 PL2303_HXN_FLOWCTRL_NONE); 902 } else { 903 pl2303_update_reg(serial, 0, PL2303_FLOWCTRL_MASK, 0); 904 } 905 } 906 907 kfree(buf); 908 } 909 910 static void pl2303_dtr_rts(struct usb_serial_port *port, int on) 911 { 912 struct pl2303_private *priv = usb_get_serial_port_data(port); 913 unsigned long flags; 914 u8 control; 915 916 spin_lock_irqsave(&priv->lock, flags); 917 if (on) 918 priv->line_control |= (CONTROL_DTR | CONTROL_RTS); 919 else 920 priv->line_control &= ~(CONTROL_DTR | CONTROL_RTS); 921 control = priv->line_control; 922 spin_unlock_irqrestore(&priv->lock, flags); 923 924 pl2303_set_control_lines(port, control); 925 } 926 927 static void pl2303_close(struct usb_serial_port *port) 928 { 929 usb_serial_generic_close(port); 930 usb_kill_urb(port->interrupt_in_urb); 931 pl2303_set_break(port, false); 932 } 933 934 static int pl2303_open(struct tty_struct *tty, struct usb_serial_port *port) 935 { 936 struct usb_serial *serial = port->serial; 937 struct pl2303_serial_private *spriv = usb_get_serial_data(serial); 938 int result; 939 940 if (spriv->quirks & PL2303_QUIRK_LEGACY) { 941 usb_clear_halt(serial->dev, port->write_urb->pipe); 942 usb_clear_halt(serial->dev, port->read_urb->pipe); 943 } else { 944 /* reset upstream data pipes */ 945 if (spriv->type == &pl2303_type_data[TYPE_HXN]) { 946 pl2303_vendor_write(serial, PL2303_HXN_RESET_REG, 947 PL2303_HXN_RESET_UPSTREAM_PIPE | 948 PL2303_HXN_RESET_DOWNSTREAM_PIPE); 949 } else { 950 pl2303_vendor_write(serial, 8, 0); 951 pl2303_vendor_write(serial, 9, 0); 952 } 953 } 954 955 /* Setup termios */ 956 if (tty) 957 pl2303_set_termios(tty, port, NULL); 958 959 result = usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL); 960 if (result) { 961 dev_err(&port->dev, "failed to submit interrupt urb: %d\n", 962 result); 963 return result; 964 } 965 966 result = usb_serial_generic_open(tty, port); 967 if (result) { 968 usb_kill_urb(port->interrupt_in_urb); 969 return result; 970 } 971 972 return 0; 973 } 974 975 static int pl2303_tiocmset(struct tty_struct *tty, 976 unsigned int set, unsigned int clear) 977 { 978 struct usb_serial_port *port = tty->driver_data; 979 struct pl2303_private *priv = usb_get_serial_port_data(port); 980 unsigned long flags; 981 u8 control; 982 int ret; 983 984 spin_lock_irqsave(&priv->lock, flags); 985 if (set & TIOCM_RTS) 986 priv->line_control |= CONTROL_RTS; 987 if (set & TIOCM_DTR) 988 priv->line_control |= CONTROL_DTR; 989 if (clear & TIOCM_RTS) 990 priv->line_control &= ~CONTROL_RTS; 991 if (clear & TIOCM_DTR) 992 priv->line_control &= ~CONTROL_DTR; 993 control = priv->line_control; 994 spin_unlock_irqrestore(&priv->lock, flags); 995 996 ret = pl2303_set_control_lines(port, control); 997 if (ret) 998 return usb_translate_errors(ret); 999 1000 return 0; 1001 } 1002 1003 static int pl2303_tiocmget(struct tty_struct *tty) 1004 { 1005 struct usb_serial_port *port = tty->driver_data; 1006 struct pl2303_private *priv = usb_get_serial_port_data(port); 1007 unsigned long flags; 1008 unsigned int mcr; 1009 unsigned int status; 1010 unsigned int result; 1011 1012 spin_lock_irqsave(&priv->lock, flags); 1013 mcr = priv->line_control; 1014 status = priv->line_status; 1015 spin_unlock_irqrestore(&priv->lock, flags); 1016 1017 result = ((mcr & CONTROL_DTR) ? TIOCM_DTR : 0) 1018 | ((mcr & CONTROL_RTS) ? TIOCM_RTS : 0) 1019 | ((status & UART_CTS) ? TIOCM_CTS : 0) 1020 | ((status & UART_DSR) ? TIOCM_DSR : 0) 1021 | ((status & UART_RING) ? TIOCM_RI : 0) 1022 | ((status & UART_DCD) ? TIOCM_CD : 0); 1023 1024 dev_dbg(&port->dev, "%s - result = %x\n", __func__, result); 1025 1026 return result; 1027 } 1028 1029 static int pl2303_carrier_raised(struct usb_serial_port *port) 1030 { 1031 struct pl2303_private *priv = usb_get_serial_port_data(port); 1032 1033 if (priv->line_status & UART_DCD) 1034 return 1; 1035 1036 return 0; 1037 } 1038 1039 static void pl2303_set_break(struct usb_serial_port *port, bool enable) 1040 { 1041 struct usb_serial *serial = port->serial; 1042 u16 state; 1043 int result; 1044 1045 if (enable) 1046 state = BREAK_ON; 1047 else 1048 state = BREAK_OFF; 1049 1050 dev_dbg(&port->dev, "%s - turning break %s\n", __func__, 1051 state == BREAK_OFF ? "off" : "on"); 1052 1053 result = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), 1054 BREAK_REQUEST, BREAK_REQUEST_TYPE, state, 1055 0, NULL, 0, 100); 1056 if (result) 1057 dev_err(&port->dev, "error sending break = %d\n", result); 1058 } 1059 1060 static void pl2303_break_ctl(struct tty_struct *tty, int state) 1061 { 1062 struct usb_serial_port *port = tty->driver_data; 1063 1064 pl2303_set_break(port, state); 1065 } 1066 1067 static void pl2303_update_line_status(struct usb_serial_port *port, 1068 unsigned char *data, 1069 unsigned int actual_length) 1070 { 1071 struct usb_serial *serial = port->serial; 1072 struct pl2303_serial_private *spriv = usb_get_serial_data(serial); 1073 struct pl2303_private *priv = usb_get_serial_port_data(port); 1074 struct tty_struct *tty; 1075 unsigned long flags; 1076 unsigned int status_idx = UART_STATE_INDEX; 1077 u8 status; 1078 u8 delta; 1079 1080 if (spriv->quirks & PL2303_QUIRK_UART_STATE_IDX0) 1081 status_idx = 0; 1082 1083 if (actual_length < status_idx + 1) 1084 return; 1085 1086 status = data[status_idx]; 1087 1088 /* Save off the uart status for others to look at */ 1089 spin_lock_irqsave(&priv->lock, flags); 1090 delta = priv->line_status ^ status; 1091 priv->line_status = status; 1092 spin_unlock_irqrestore(&priv->lock, flags); 1093 1094 if (status & UART_BREAK_ERROR) 1095 usb_serial_handle_break(port); 1096 1097 if (delta & UART_STATE_MSR_MASK) { 1098 if (delta & UART_CTS) 1099 port->icount.cts++; 1100 if (delta & UART_DSR) 1101 port->icount.dsr++; 1102 if (delta & UART_RING) 1103 port->icount.rng++; 1104 if (delta & UART_DCD) { 1105 port->icount.dcd++; 1106 tty = tty_port_tty_get(&port->port); 1107 if (tty) { 1108 usb_serial_handle_dcd_change(port, tty, 1109 status & UART_DCD); 1110 tty_kref_put(tty); 1111 } 1112 } 1113 1114 wake_up_interruptible(&port->port.delta_msr_wait); 1115 } 1116 } 1117 1118 static void pl2303_read_int_callback(struct urb *urb) 1119 { 1120 struct usb_serial_port *port = urb->context; 1121 unsigned char *data = urb->transfer_buffer; 1122 unsigned int actual_length = urb->actual_length; 1123 int status = urb->status; 1124 int retval; 1125 1126 switch (status) { 1127 case 0: 1128 /* success */ 1129 break; 1130 case -ECONNRESET: 1131 case -ENOENT: 1132 case -ESHUTDOWN: 1133 /* this urb is terminated, clean up */ 1134 dev_dbg(&port->dev, "%s - urb shutting down with status: %d\n", 1135 __func__, status); 1136 return; 1137 default: 1138 dev_dbg(&port->dev, "%s - nonzero urb status received: %d\n", 1139 __func__, status); 1140 goto exit; 1141 } 1142 1143 usb_serial_debug_data(&port->dev, __func__, 1144 urb->actual_length, urb->transfer_buffer); 1145 1146 pl2303_update_line_status(port, data, actual_length); 1147 1148 exit: 1149 retval = usb_submit_urb(urb, GFP_ATOMIC); 1150 if (retval) { 1151 dev_err(&port->dev, 1152 "%s - usb_submit_urb failed with result %d\n", 1153 __func__, retval); 1154 } 1155 } 1156 1157 static void pl2303_process_read_urb(struct urb *urb) 1158 { 1159 struct usb_serial_port *port = urb->context; 1160 struct pl2303_private *priv = usb_get_serial_port_data(port); 1161 unsigned char *data = urb->transfer_buffer; 1162 char tty_flag = TTY_NORMAL; 1163 unsigned long flags; 1164 u8 line_status; 1165 int i; 1166 1167 /* update line status */ 1168 spin_lock_irqsave(&priv->lock, flags); 1169 line_status = priv->line_status; 1170 priv->line_status &= ~UART_STATE_TRANSIENT_MASK; 1171 spin_unlock_irqrestore(&priv->lock, flags); 1172 1173 if (!urb->actual_length) 1174 return; 1175 1176 /* 1177 * Break takes precedence over parity, which takes precedence over 1178 * framing errors. 1179 */ 1180 if (line_status & UART_BREAK_ERROR) 1181 tty_flag = TTY_BREAK; 1182 else if (line_status & UART_PARITY_ERROR) 1183 tty_flag = TTY_PARITY; 1184 else if (line_status & UART_FRAME_ERROR) 1185 tty_flag = TTY_FRAME; 1186 1187 if (tty_flag != TTY_NORMAL) 1188 dev_dbg(&port->dev, "%s - tty_flag = %d\n", __func__, 1189 tty_flag); 1190 /* overrun is special, not associated with a char */ 1191 if (line_status & UART_OVERRUN_ERROR) 1192 tty_insert_flip_char(&port->port, 0, TTY_OVERRUN); 1193 1194 if (port->sysrq) { 1195 for (i = 0; i < urb->actual_length; ++i) 1196 if (!usb_serial_handle_sysrq_char(port, data[i])) 1197 tty_insert_flip_char(&port->port, data[i], 1198 tty_flag); 1199 } else { 1200 tty_insert_flip_string_fixed_flag(&port->port, data, tty_flag, 1201 urb->actual_length); 1202 } 1203 1204 tty_flip_buffer_push(&port->port); 1205 } 1206 1207 static struct usb_serial_driver pl2303_device = { 1208 .driver = { 1209 .owner = THIS_MODULE, 1210 .name = "pl2303", 1211 }, 1212 .id_table = id_table, 1213 .num_bulk_in = 1, 1214 .num_bulk_out = 1, 1215 .num_interrupt_in = 0, /* see pl2303_calc_num_ports */ 1216 .bulk_in_size = 256, 1217 .bulk_out_size = 256, 1218 .open = pl2303_open, 1219 .close = pl2303_close, 1220 .dtr_rts = pl2303_dtr_rts, 1221 .carrier_raised = pl2303_carrier_raised, 1222 .break_ctl = pl2303_break_ctl, 1223 .set_termios = pl2303_set_termios, 1224 .tiocmget = pl2303_tiocmget, 1225 .tiocmset = pl2303_tiocmset, 1226 .tiocmiwait = usb_serial_generic_tiocmiwait, 1227 .process_read_urb = pl2303_process_read_urb, 1228 .read_int_callback = pl2303_read_int_callback, 1229 .probe = pl2303_probe, 1230 .calc_num_ports = pl2303_calc_num_ports, 1231 .attach = pl2303_startup, 1232 .release = pl2303_release, 1233 .port_probe = pl2303_port_probe, 1234 .port_remove = pl2303_port_remove, 1235 }; 1236 1237 static struct usb_serial_driver * const serial_drivers[] = { 1238 &pl2303_device, NULL 1239 }; 1240 1241 module_usb_serial_driver(serial_drivers, id_table); 1242 1243 MODULE_DESCRIPTION("Prolific PL2303 USB to serial adaptor driver"); 1244 MODULE_LICENSE("GPL v2"); 1245