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 35static 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_LM930_PRODUCT_ID) }, 110 { USB_DEVICE(HP_VENDOR_ID, HP_LM940_PRODUCT_ID) }, 111 { USB_DEVICE(HP_VENDOR_ID, HP_TD620_PRODUCT_ID) }, 112 { USB_DEVICE(CRESSI_VENDOR_ID, CRESSI_EDY_PRODUCT_ID) }, 113 { USB_DEVICE(ZEAGLE_VENDOR_ID, ZEAGLE_N2ITION3_PRODUCT_ID) }, 114 { USB_DEVICE(SONY_VENDOR_ID, SONY_QN3USB_PRODUCT_ID) }, 115 { USB_DEVICE(SANWA_VENDOR_ID, SANWA_PRODUCT_ID) }, 116 { USB_DEVICE(ADLINK_VENDOR_ID, ADLINK_ND6530_PRODUCT_ID) }, 117 { USB_DEVICE(ADLINK_VENDOR_ID, ADLINK_ND6530GC_PRODUCT_ID) }, 118 { USB_DEVICE(SMART_VENDOR_ID, SMART_PRODUCT_ID) }, 119 { USB_DEVICE(AT_VENDOR_ID, AT_VTKIT3_PRODUCT_ID) }, 120 { USB_DEVICE(IBM_VENDOR_ID, IBM_PRODUCT_ID) }, 121 { } /* Terminating entry */ 122}; 123 124MODULE_DEVICE_TABLE(usb, id_table); 125 126#define SET_LINE_REQUEST_TYPE 0x21 127#define SET_LINE_REQUEST 0x20 128 129#define SET_CONTROL_REQUEST_TYPE 0x21 130#define SET_CONTROL_REQUEST 0x22 131#define CONTROL_DTR 0x01 132#define CONTROL_RTS 0x02 133 134#define BREAK_REQUEST_TYPE 0x21 135#define BREAK_REQUEST 0x23 136#define BREAK_ON 0xffff 137#define BREAK_OFF 0x0000 138 139#define GET_LINE_REQUEST_TYPE 0xa1 140#define GET_LINE_REQUEST 0x21 141 142#define VENDOR_WRITE_REQUEST_TYPE 0x40 143#define VENDOR_WRITE_REQUEST 0x01 144#define VENDOR_WRITE_NREQUEST 0x80 145 146#define VENDOR_READ_REQUEST_TYPE 0xc0 147#define VENDOR_READ_REQUEST 0x01 148#define VENDOR_READ_NREQUEST 0x81 149 150#define UART_STATE_INDEX 8 151#define UART_STATE_MSR_MASK 0x8b 152#define UART_STATE_TRANSIENT_MASK 0x74 153#define UART_DCD 0x01 154#define UART_DSR 0x02 155#define UART_BREAK_ERROR 0x04 156#define UART_RING 0x08 157#define UART_FRAME_ERROR 0x10 158#define UART_PARITY_ERROR 0x20 159#define UART_OVERRUN_ERROR 0x40 160#define UART_CTS 0x80 161 162#define PL2303_FLOWCTRL_MASK 0xf0 163 164#define PL2303_READ_TYPE_HX_STATUS 0x8080 165 166#define PL2303_HXN_RESET_REG 0x07 167#define PL2303_HXN_RESET_UPSTREAM_PIPE 0x02 168#define PL2303_HXN_RESET_DOWNSTREAM_PIPE 0x01 169 170#define PL2303_HXN_FLOWCTRL_REG 0x0a 171#define PL2303_HXN_FLOWCTRL_MASK 0x1c 172#define PL2303_HXN_FLOWCTRL_NONE 0x1c 173#define PL2303_HXN_FLOWCTRL_RTS_CTS 0x18 174#define PL2303_HXN_FLOWCTRL_XON_XOFF 0x0c 175 176static int pl2303_set_break(struct usb_serial_port *port, bool enable); 177 178enum pl2303_type { 179 TYPE_H, 180 TYPE_HX, 181 TYPE_TA, 182 TYPE_TB, 183 TYPE_HXD, 184 TYPE_HXN, 185 TYPE_COUNT 186}; 187 188struct pl2303_type_data { 189 const char *name; 190 speed_t max_baud_rate; 191 unsigned long quirks; 192 unsigned int no_autoxonxoff:1; 193 unsigned int no_divisors:1; 194 unsigned int alt_divisors:1; 195}; 196 197struct pl2303_serial_private { 198 const struct pl2303_type_data *type; 199 unsigned long quirks; 200}; 201 202struct pl2303_private { 203 spinlock_t lock; 204 u8 line_control; 205 u8 line_status; 206 207 u8 line_settings[7]; 208}; 209 210static const struct pl2303_type_data pl2303_type_data[TYPE_COUNT] = { 211 [TYPE_H] = { 212 .name = "H", 213 .max_baud_rate = 1228800, 214 .quirks = PL2303_QUIRK_LEGACY, 215 .no_autoxonxoff = true, 216 }, 217 [TYPE_HX] = { 218 .name = "HX", 219 .max_baud_rate = 6000000, 220 }, 221 [TYPE_TA] = { 222 .name = "TA", 223 .max_baud_rate = 6000000, 224 .alt_divisors = true, 225 }, 226 [TYPE_TB] = { 227 .name = "TB", 228 .max_baud_rate = 12000000, 229 .alt_divisors = true, 230 }, 231 [TYPE_HXD] = { 232 .name = "HXD", 233 .max_baud_rate = 12000000, 234 }, 235 [TYPE_HXN] = { 236 .name = "G", 237 .max_baud_rate = 12000000, 238 .no_divisors = true, 239 }, 240}; 241 242static int pl2303_vendor_read(struct usb_serial *serial, u16 value, 243 unsigned char buf[1]) 244{ 245 struct pl2303_serial_private *spriv = usb_get_serial_data(serial); 246 struct device *dev = &serial->interface->dev; 247 u8 request; 248 int res; 249 250 if (spriv->type == &pl2303_type_data[TYPE_HXN]) 251 request = VENDOR_READ_NREQUEST; 252 else 253 request = VENDOR_READ_REQUEST; 254 255 res = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0), 256 request, VENDOR_READ_REQUEST_TYPE, 257 value, 0, buf, 1, 100); 258 if (res != 1) { 259 dev_err(dev, "%s - failed to read [%04x]: %d\n", __func__, 260 value, res); 261 if (res >= 0) 262 res = -EIO; 263 264 return res; 265 } 266 267 dev_dbg(dev, "%s - [%04x] = %02x\n", __func__, value, buf[0]); 268 269 return 0; 270} 271 272static int pl2303_vendor_write(struct usb_serial *serial, u16 value, u16 index) 273{ 274 struct pl2303_serial_private *spriv = usb_get_serial_data(serial); 275 struct device *dev = &serial->interface->dev; 276 u8 request; 277 int res; 278 279 dev_dbg(dev, "%s - [%04x] = %02x\n", __func__, value, index); 280 281 if (spriv->type == &pl2303_type_data[TYPE_HXN]) 282 request = VENDOR_WRITE_NREQUEST; 283 else 284 request = VENDOR_WRITE_REQUEST; 285 286 res = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), 287 request, VENDOR_WRITE_REQUEST_TYPE, 288 value, index, NULL, 0, 100); 289 if (res) { 290 dev_err(dev, "%s - failed to write [%04x]: %d\n", __func__, 291 value, res); 292 return res; 293 } 294 295 return 0; 296} 297 298static int pl2303_update_reg(struct usb_serial *serial, u8 reg, u8 mask, u8 val) 299{ 300 struct pl2303_serial_private *spriv = usb_get_serial_data(serial); 301 int ret = 0; 302 u8 *buf; 303 304 buf = kmalloc(1, GFP_KERNEL); 305 if (!buf) 306 return -ENOMEM; 307 308 if (spriv->type == &pl2303_type_data[TYPE_HXN]) 309 ret = pl2303_vendor_read(serial, reg, buf); 310 else 311 ret = pl2303_vendor_read(serial, reg | 0x80, buf); 312 313 if (ret) 314 goto out_free; 315 316 *buf &= ~mask; 317 *buf |= val & mask; 318 319 ret = pl2303_vendor_write(serial, reg, *buf); 320out_free: 321 kfree(buf); 322 323 return ret; 324} 325 326static int pl2303_probe(struct usb_serial *serial, 327 const struct usb_device_id *id) 328{ 329 usb_set_serial_data(serial, (void *)id->driver_info); 330 331 return 0; 332} 333 334/* 335 * Use interrupt endpoint from first interface if available. 336 * 337 * This is needed due to the looney way its endpoints are set up. 338 */ 339static int pl2303_endpoint_hack(struct usb_serial *serial, 340 struct usb_serial_endpoints *epds) 341{ 342 struct usb_interface *interface = serial->interface; 343 struct usb_device *dev = serial->dev; 344 struct device *ddev = &interface->dev; 345 struct usb_host_interface *iface_desc; 346 struct usb_endpoint_descriptor *endpoint; 347 unsigned int i; 348 349 if (interface == dev->actconfig->interface[0]) 350 return 0; 351 352 /* check out the endpoints of the other interface */ 353 iface_desc = dev->actconfig->interface[0]->cur_altsetting; 354 355 for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) { 356 endpoint = &iface_desc->endpoint[i].desc; 357 358 if (!usb_endpoint_is_int_in(endpoint)) 359 continue; 360 361 dev_dbg(ddev, "found interrupt in on separate interface\n"); 362 if (epds->num_interrupt_in < ARRAY_SIZE(epds->interrupt_in)) 363 epds->interrupt_in[epds->num_interrupt_in++] = endpoint; 364 } 365 366 return 0; 367} 368 369static int pl2303_calc_num_ports(struct usb_serial *serial, 370 struct usb_serial_endpoints *epds) 371{ 372 unsigned long quirks = (unsigned long)usb_get_serial_data(serial); 373 struct device *dev = &serial->interface->dev; 374 int ret; 375 376 if (quirks & PL2303_QUIRK_ENDPOINT_HACK) { 377 ret = pl2303_endpoint_hack(serial, epds); 378 if (ret) 379 return ret; 380 } 381 382 if (epds->num_interrupt_in < 1) { 383 dev_err(dev, "required interrupt-in endpoint missing\n"); 384 return -ENODEV; 385 } 386 387 return 1; 388} 389 390static bool pl2303_supports_hx_status(struct usb_serial *serial) 391{ 392 int ret; 393 u8 buf; 394 395 ret = usb_control_msg_recv(serial->dev, 0, VENDOR_READ_REQUEST, 396 VENDOR_READ_REQUEST_TYPE, PL2303_READ_TYPE_HX_STATUS, 397 0, &buf, 1, 100, GFP_KERNEL); 398 399 return ret == 0; 400} 401 402static int pl2303_detect_type(struct usb_serial *serial) 403{ 404 struct usb_device_descriptor *desc = &serial->dev->descriptor; 405 u16 bcdDevice, bcdUSB; 406 407 /* 408 * Legacy PL2303H, variants 0 and 1 (difference unknown). 409 */ 410 if (desc->bDeviceClass == 0x02) 411 return TYPE_H; /* variant 0 */ 412 413 if (desc->bMaxPacketSize0 != 0x40) { 414 if (desc->bDeviceClass == 0x00 || desc->bDeviceClass == 0xff) 415 return TYPE_H; /* variant 1 */ 416 417 return TYPE_H; /* variant 0 */ 418 } 419 420 bcdDevice = le16_to_cpu(desc->bcdDevice); 421 bcdUSB = le16_to_cpu(desc->bcdUSB); 422 423 switch (bcdUSB) { 424 case 0x101: 425 /* USB 1.0.1? Let's assume they meant 1.1... */ 426 fallthrough; 427 case 0x110: 428 switch (bcdDevice) { 429 case 0x300: 430 return TYPE_HX; 431 case 0x400: 432 return TYPE_HXD; 433 default: 434 return TYPE_HX; 435 } 436 break; 437 case 0x200: 438 switch (bcdDevice) { 439 case 0x100: /* GC */ 440 case 0x105: 441 return TYPE_HXN; 442 case 0x300: /* GT / TA */ 443 if (pl2303_supports_hx_status(serial)) 444 return TYPE_TA; 445 fallthrough; 446 case 0x305: 447 case 0x400: /* GL */ 448 case 0x405: 449 return TYPE_HXN; 450 case 0x500: /* GE / TB */ 451 if (pl2303_supports_hx_status(serial)) 452 return TYPE_TB; 453 fallthrough; 454 case 0x505: 455 case 0x600: /* GS */ 456 case 0x605: 457 case 0x700: /* GR */ 458 case 0x705: 459 return TYPE_HXN; 460 } 461 break; 462 } 463 464 dev_err(&serial->interface->dev, 465 "unknown device type, please report to linux-usb@vger.kernel.org\n"); 466 return -ENODEV; 467} 468 469static int pl2303_startup(struct usb_serial *serial) 470{ 471 struct pl2303_serial_private *spriv; 472 enum pl2303_type type; 473 unsigned char *buf; 474 int ret; 475 476 ret = pl2303_detect_type(serial); 477 if (ret < 0) 478 return ret; 479 480 type = ret; 481 dev_dbg(&serial->interface->dev, "device type: %s\n", pl2303_type_data[type].name); 482 483 spriv = kzalloc(sizeof(*spriv), GFP_KERNEL); 484 if (!spriv) 485 return -ENOMEM; 486 487 spriv->type = &pl2303_type_data[type]; 488 spriv->quirks = (unsigned long)usb_get_serial_data(serial); 489 spriv->quirks |= spriv->type->quirks; 490 491 usb_set_serial_data(serial, spriv); 492 493 if (type != TYPE_HXN) { 494 buf = kmalloc(1, GFP_KERNEL); 495 if (!buf) { 496 kfree(spriv); 497 return -ENOMEM; 498 } 499 500 pl2303_vendor_read(serial, 0x8484, buf); 501 pl2303_vendor_write(serial, 0x0404, 0); 502 pl2303_vendor_read(serial, 0x8484, buf); 503 pl2303_vendor_read(serial, 0x8383, buf); 504 pl2303_vendor_read(serial, 0x8484, buf); 505 pl2303_vendor_write(serial, 0x0404, 1); 506 pl2303_vendor_read(serial, 0x8484, buf); 507 pl2303_vendor_read(serial, 0x8383, buf); 508 pl2303_vendor_write(serial, 0, 1); 509 pl2303_vendor_write(serial, 1, 0); 510 if (spriv->quirks & PL2303_QUIRK_LEGACY) 511 pl2303_vendor_write(serial, 2, 0x24); 512 else 513 pl2303_vendor_write(serial, 2, 0x44); 514 515 kfree(buf); 516 } 517 518 return 0; 519} 520 521static void pl2303_release(struct usb_serial *serial) 522{ 523 struct pl2303_serial_private *spriv = usb_get_serial_data(serial); 524 525 kfree(spriv); 526} 527 528static int pl2303_port_probe(struct usb_serial_port *port) 529{ 530 struct pl2303_private *priv; 531 532 priv = kzalloc(sizeof(*priv), GFP_KERNEL); 533 if (!priv) 534 return -ENOMEM; 535 536 spin_lock_init(&priv->lock); 537 538 usb_set_serial_port_data(port, priv); 539 540 port->port.drain_delay = 256; 541 542 return 0; 543} 544 545static void pl2303_port_remove(struct usb_serial_port *port) 546{ 547 struct pl2303_private *priv = usb_get_serial_port_data(port); 548 549 kfree(priv); 550} 551 552static int pl2303_set_control_lines(struct usb_serial_port *port, u8 value) 553{ 554 struct usb_device *dev = port->serial->dev; 555 int retval; 556 557 dev_dbg(&port->dev, "%s - %02x\n", __func__, value); 558 559 retval = usb_control_msg(dev, usb_sndctrlpipe(dev, 0), 560 SET_CONTROL_REQUEST, SET_CONTROL_REQUEST_TYPE, 561 value, 0, NULL, 0, 100); 562 if (retval) 563 dev_err(&port->dev, "%s - failed: %d\n", __func__, retval); 564 565 return retval; 566} 567 568/* 569 * Returns the nearest supported baud rate that can be set directly without 570 * using divisors. 571 */ 572static speed_t pl2303_get_supported_baud_rate(speed_t baud) 573{ 574 static const speed_t baud_sup[] = { 575 75, 150, 300, 600, 1200, 1800, 2400, 3600, 4800, 7200, 9600, 576 14400, 19200, 28800, 38400, 57600, 115200, 230400, 460800, 577 614400, 921600, 1228800, 2457600, 3000000, 6000000 578 }; 579 580 unsigned i; 581 582 for (i = 0; i < ARRAY_SIZE(baud_sup); ++i) { 583 if (baud_sup[i] > baud) 584 break; 585 } 586 587 if (i == ARRAY_SIZE(baud_sup)) 588 baud = baud_sup[i - 1]; 589 else if (i > 0 && (baud_sup[i] - baud) > (baud - baud_sup[i - 1])) 590 baud = baud_sup[i - 1]; 591 else 592 baud = baud_sup[i]; 593 594 return baud; 595} 596 597/* 598 * NOTE: If unsupported baud rates are set directly, the PL2303 seems to 599 * use 9600 baud. 600 */ 601static speed_t pl2303_encode_baud_rate_direct(unsigned char buf[4], 602 speed_t baud) 603{ 604 put_unaligned_le32(baud, buf); 605 606 return baud; 607} 608 609static speed_t pl2303_encode_baud_rate_divisor(unsigned char buf[4], 610 speed_t baud) 611{ 612 unsigned int baseline, mantissa, exponent; 613 614 /* 615 * Apparently the formula is: 616 * baudrate = 12M * 32 / (mantissa * 4^exponent) 617 * where 618 * mantissa = buf[8:0] 619 * exponent = buf[11:9] 620 */ 621 baseline = 12000000 * 32; 622 mantissa = baseline / baud; 623 if (mantissa == 0) 624 mantissa = 1; /* Avoid dividing by zero if baud > 32*12M. */ 625 exponent = 0; 626 while (mantissa >= 512) { 627 if (exponent < 7) { 628 mantissa >>= 2; /* divide by 4 */ 629 exponent++; 630 } else { 631 /* Exponent is maxed. Trim mantissa and leave. */ 632 mantissa = 511; 633 break; 634 } 635 } 636 637 buf[3] = 0x80; 638 buf[2] = 0; 639 buf[1] = exponent << 1 | mantissa >> 8; 640 buf[0] = mantissa & 0xff; 641 642 /* Calculate and return the exact baud rate. */ 643 baud = (baseline / mantissa) >> (exponent << 1); 644 645 return baud; 646} 647 648static speed_t pl2303_encode_baud_rate_divisor_alt(unsigned char buf[4], 649 speed_t baud) 650{ 651 unsigned int baseline, mantissa, exponent; 652 653 /* 654 * Apparently, for the TA version the formula is: 655 * baudrate = 12M * 32 / (mantissa * 2^exponent) 656 * where 657 * mantissa = buf[10:0] 658 * exponent = buf[15:13 16] 659 */ 660 baseline = 12000000 * 32; 661 mantissa = baseline / baud; 662 if (mantissa == 0) 663 mantissa = 1; /* Avoid dividing by zero if baud > 32*12M. */ 664 exponent = 0; 665 while (mantissa >= 2048) { 666 if (exponent < 15) { 667 mantissa >>= 1; /* divide by 2 */ 668 exponent++; 669 } else { 670 /* Exponent is maxed. Trim mantissa and leave. */ 671 mantissa = 2047; 672 break; 673 } 674 } 675 676 buf[3] = 0x80; 677 buf[2] = exponent & 0x01; 678 buf[1] = (exponent & ~0x01) << 4 | mantissa >> 8; 679 buf[0] = mantissa & 0xff; 680 681 /* Calculate and return the exact baud rate. */ 682 baud = (baseline / mantissa) >> exponent; 683 684 return baud; 685} 686 687static void pl2303_encode_baud_rate(struct tty_struct *tty, 688 struct usb_serial_port *port, 689 u8 buf[4]) 690{ 691 struct usb_serial *serial = port->serial; 692 struct pl2303_serial_private *spriv = usb_get_serial_data(serial); 693 speed_t baud_sup; 694 speed_t baud; 695 696 baud = tty_get_baud_rate(tty); 697 dev_dbg(&port->dev, "baud requested = %u\n", baud); 698 if (!baud) 699 return; 700 701 if (spriv->type->max_baud_rate) 702 baud = min_t(speed_t, baud, spriv->type->max_baud_rate); 703 /* 704 * Use direct method for supported baud rates, otherwise use divisors. 705 * Newer chip types do not support divisor encoding. 706 */ 707 if (spriv->type->no_divisors) 708 baud_sup = baud; 709 else 710 baud_sup = pl2303_get_supported_baud_rate(baud); 711 712 if (baud == baud_sup) 713 baud = pl2303_encode_baud_rate_direct(buf, baud); 714 else if (spriv->type->alt_divisors) 715 baud = pl2303_encode_baud_rate_divisor_alt(buf, baud); 716 else 717 baud = pl2303_encode_baud_rate_divisor(buf, baud); 718 719 /* Save resulting baud rate */ 720 tty_encode_baud_rate(tty, baud, baud); 721 dev_dbg(&port->dev, "baud set = %u\n", baud); 722} 723 724static int pl2303_get_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_rcvctrlpipe(udev, 0), 731 GET_LINE_REQUEST, GET_LINE_REQUEST_TYPE, 732 0, 0, buf, 7, 100); 733 if (ret != 7) { 734 dev_err(&port->dev, "%s - failed: %d\n", __func__, ret); 735 736 if (ret >= 0) 737 ret = -EIO; 738 739 return ret; 740 } 741 742 dev_dbg(&port->dev, "%s - %7ph\n", __func__, buf); 743 744 return 0; 745} 746 747static int pl2303_set_line_request(struct usb_serial_port *port, 748 unsigned char buf[7]) 749{ 750 struct usb_device *udev = port->serial->dev; 751 int ret; 752 753 ret = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), 754 SET_LINE_REQUEST, SET_LINE_REQUEST_TYPE, 755 0, 0, buf, 7, 100); 756 if (ret < 0) { 757 dev_err(&port->dev, "%s - failed: %d\n", __func__, ret); 758 return ret; 759 } 760 761 dev_dbg(&port->dev, "%s - %7ph\n", __func__, buf); 762 763 return 0; 764} 765 766static bool pl2303_termios_change(const struct ktermios *a, const struct ktermios *b) 767{ 768 bool ixon_change; 769 770 ixon_change = ((a->c_iflag ^ b->c_iflag) & (IXON | IXANY)) || 771 a->c_cc[VSTART] != b->c_cc[VSTART] || 772 a->c_cc[VSTOP] != b->c_cc[VSTOP]; 773 774 return tty_termios_hw_change(a, b) || ixon_change; 775} 776 777static bool pl2303_enable_xonxoff(struct tty_struct *tty, const struct pl2303_type_data *type) 778{ 779 if (!I_IXON(tty) || I_IXANY(tty)) 780 return false; 781 782 if (START_CHAR(tty) != 0x11 || STOP_CHAR(tty) != 0x13) 783 return false; 784 785 if (type->no_autoxonxoff) 786 return false; 787 788 return true; 789} 790 791static void pl2303_set_termios(struct tty_struct *tty, 792 struct usb_serial_port *port, 793 const struct ktermios *old_termios) 794{ 795 struct usb_serial *serial = port->serial; 796 struct pl2303_serial_private *spriv = usb_get_serial_data(serial); 797 struct pl2303_private *priv = usb_get_serial_port_data(port); 798 unsigned long flags; 799 unsigned char *buf; 800 int ret; 801 u8 control; 802 803 if (old_termios && !pl2303_termios_change(&tty->termios, old_termios)) 804 return; 805 806 buf = kzalloc(7, GFP_KERNEL); 807 if (!buf) { 808 /* Report back no change occurred */ 809 if (old_termios) 810 tty->termios = *old_termios; 811 return; 812 } 813 814 pl2303_get_line_request(port, buf); 815 816 buf[6] = tty_get_char_size(tty->termios.c_cflag); 817 dev_dbg(&port->dev, "data bits = %d\n", buf[6]); 818 819 /* For reference buf[0]:buf[3] baud rate value */ 820 pl2303_encode_baud_rate(tty, port, &buf[0]); 821 822 /* For reference buf[4]=0 is 1 stop bits */ 823 /* For reference buf[4]=1 is 1.5 stop bits */ 824 /* For reference buf[4]=2 is 2 stop bits */ 825 if (C_CSTOPB(tty)) { 826 /* 827 * NOTE: Comply with "real" UARTs / RS232: 828 * use 1.5 instead of 2 stop bits with 5 data bits 829 */ 830 if (C_CSIZE(tty) == CS5) { 831 buf[4] = 1; 832 dev_dbg(&port->dev, "stop bits = 1.5\n"); 833 } else { 834 buf[4] = 2; 835 dev_dbg(&port->dev, "stop bits = 2\n"); 836 } 837 } else { 838 buf[4] = 0; 839 dev_dbg(&port->dev, "stop bits = 1\n"); 840 } 841 842 if (C_PARENB(tty)) { 843 /* For reference buf[5]=0 is none parity */ 844 /* For reference buf[5]=1 is odd parity */ 845 /* For reference buf[5]=2 is even parity */ 846 /* For reference buf[5]=3 is mark parity */ 847 /* For reference buf[5]=4 is space parity */ 848 if (C_PARODD(tty)) { 849 if (C_CMSPAR(tty)) { 850 buf[5] = 3; 851 dev_dbg(&port->dev, "parity = mark\n"); 852 } else { 853 buf[5] = 1; 854 dev_dbg(&port->dev, "parity = odd\n"); 855 } 856 } else { 857 if (C_CMSPAR(tty)) { 858 buf[5] = 4; 859 dev_dbg(&port->dev, "parity = space\n"); 860 } else { 861 buf[5] = 2; 862 dev_dbg(&port->dev, "parity = even\n"); 863 } 864 } 865 } else { 866 buf[5] = 0; 867 dev_dbg(&port->dev, "parity = none\n"); 868 } 869 870 /* 871 * Some PL2303 are known to lose bytes if you change serial settings 872 * even to the same values as before. Thus we actually need to filter 873 * in this specific case. 874 * 875 * Note that the tty_termios_hw_change check above is not sufficient 876 * as a previously requested baud rate may differ from the one 877 * actually used (and stored in old_termios). 878 * 879 * NOTE: No additional locking needed for line_settings as it is 880 * only used in set_termios, which is serialised against itself. 881 */ 882 if (!old_termios || memcmp(buf, priv->line_settings, 7)) { 883 ret = pl2303_set_line_request(port, buf); 884 if (!ret) 885 memcpy(priv->line_settings, buf, 7); 886 } 887 888 /* change control lines if we are switching to or from B0 */ 889 spin_lock_irqsave(&priv->lock, flags); 890 control = priv->line_control; 891 if (C_BAUD(tty) == B0) 892 priv->line_control &= ~(CONTROL_DTR | CONTROL_RTS); 893 else if (old_termios && (old_termios->c_cflag & CBAUD) == B0) 894 priv->line_control |= (CONTROL_DTR | CONTROL_RTS); 895 if (control != priv->line_control) { 896 control = priv->line_control; 897 spin_unlock_irqrestore(&priv->lock, flags); 898 pl2303_set_control_lines(port, control); 899 } else { 900 spin_unlock_irqrestore(&priv->lock, flags); 901 } 902 903 if (C_CRTSCTS(tty)) { 904 if (spriv->quirks & PL2303_QUIRK_LEGACY) { 905 pl2303_update_reg(serial, 0, PL2303_FLOWCTRL_MASK, 0x40); 906 } else if (spriv->type == &pl2303_type_data[TYPE_HXN]) { 907 pl2303_update_reg(serial, PL2303_HXN_FLOWCTRL_REG, 908 PL2303_HXN_FLOWCTRL_MASK, 909 PL2303_HXN_FLOWCTRL_RTS_CTS); 910 } else { 911 pl2303_update_reg(serial, 0, PL2303_FLOWCTRL_MASK, 0x60); 912 } 913 } else if (pl2303_enable_xonxoff(tty, spriv->type)) { 914 if (spriv->type == &pl2303_type_data[TYPE_HXN]) { 915 pl2303_update_reg(serial, PL2303_HXN_FLOWCTRL_REG, 916 PL2303_HXN_FLOWCTRL_MASK, 917 PL2303_HXN_FLOWCTRL_XON_XOFF); 918 } else { 919 pl2303_update_reg(serial, 0, PL2303_FLOWCTRL_MASK, 0xc0); 920 } 921 } else { 922 if (spriv->type == &pl2303_type_data[TYPE_HXN]) { 923 pl2303_update_reg(serial, PL2303_HXN_FLOWCTRL_REG, 924 PL2303_HXN_FLOWCTRL_MASK, 925 PL2303_HXN_FLOWCTRL_NONE); 926 } else { 927 pl2303_update_reg(serial, 0, PL2303_FLOWCTRL_MASK, 0); 928 } 929 } 930 931 kfree(buf); 932} 933 934static void pl2303_dtr_rts(struct usb_serial_port *port, int on) 935{ 936 struct pl2303_private *priv = usb_get_serial_port_data(port); 937 unsigned long flags; 938 u8 control; 939 940 spin_lock_irqsave(&priv->lock, flags); 941 if (on) 942 priv->line_control |= (CONTROL_DTR | CONTROL_RTS); 943 else 944 priv->line_control &= ~(CONTROL_DTR | CONTROL_RTS); 945 control = priv->line_control; 946 spin_unlock_irqrestore(&priv->lock, flags); 947 948 pl2303_set_control_lines(port, control); 949} 950 951static void pl2303_close(struct usb_serial_port *port) 952{ 953 usb_serial_generic_close(port); 954 usb_kill_urb(port->interrupt_in_urb); 955 pl2303_set_break(port, false); 956} 957 958static int pl2303_open(struct tty_struct *tty, struct usb_serial_port *port) 959{ 960 struct usb_serial *serial = port->serial; 961 struct pl2303_serial_private *spriv = usb_get_serial_data(serial); 962 int result; 963 964 if (spriv->quirks & PL2303_QUIRK_LEGACY) { 965 usb_clear_halt(serial->dev, port->write_urb->pipe); 966 usb_clear_halt(serial->dev, port->read_urb->pipe); 967 } else { 968 /* reset upstream data pipes */ 969 if (spriv->type == &pl2303_type_data[TYPE_HXN]) { 970 pl2303_vendor_write(serial, PL2303_HXN_RESET_REG, 971 PL2303_HXN_RESET_UPSTREAM_PIPE | 972 PL2303_HXN_RESET_DOWNSTREAM_PIPE); 973 } else { 974 pl2303_vendor_write(serial, 8, 0); 975 pl2303_vendor_write(serial, 9, 0); 976 } 977 } 978 979 /* Setup termios */ 980 if (tty) 981 pl2303_set_termios(tty, port, NULL); 982 983 result = usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL); 984 if (result) { 985 dev_err(&port->dev, "failed to submit interrupt urb: %d\n", 986 result); 987 return result; 988 } 989 990 result = usb_serial_generic_open(tty, port); 991 if (result) { 992 usb_kill_urb(port->interrupt_in_urb); 993 return result; 994 } 995 996 return 0; 997} 998 999static int pl2303_tiocmset(struct tty_struct *tty, 1000 unsigned int set, unsigned int clear) 1001{ 1002 struct usb_serial_port *port = tty->driver_data; 1003 struct pl2303_private *priv = usb_get_serial_port_data(port); 1004 unsigned long flags; 1005 u8 control; 1006 int ret; 1007 1008 spin_lock_irqsave(&priv->lock, flags); 1009 if (set & TIOCM_RTS) 1010 priv->line_control |= CONTROL_RTS; 1011 if (set & TIOCM_DTR) 1012 priv->line_control |= CONTROL_DTR; 1013 if (clear & TIOCM_RTS) 1014 priv->line_control &= ~CONTROL_RTS; 1015 if (clear & TIOCM_DTR) 1016 priv->line_control &= ~CONTROL_DTR; 1017 control = priv->line_control; 1018 spin_unlock_irqrestore(&priv->lock, flags); 1019 1020 ret = pl2303_set_control_lines(port, control); 1021 if (ret) 1022 return usb_translate_errors(ret); 1023 1024 return 0; 1025} 1026 1027static int pl2303_tiocmget(struct tty_struct *tty) 1028{ 1029 struct usb_serial_port *port = tty->driver_data; 1030 struct pl2303_private *priv = usb_get_serial_port_data(port); 1031 unsigned long flags; 1032 unsigned int mcr; 1033 unsigned int status; 1034 unsigned int result; 1035 1036 spin_lock_irqsave(&priv->lock, flags); 1037 mcr = priv->line_control; 1038 status = priv->line_status; 1039 spin_unlock_irqrestore(&priv->lock, flags); 1040 1041 result = ((mcr & CONTROL_DTR) ? TIOCM_DTR : 0) 1042 | ((mcr & CONTROL_RTS) ? TIOCM_RTS : 0) 1043 | ((status & UART_CTS) ? TIOCM_CTS : 0) 1044 | ((status & UART_DSR) ? TIOCM_DSR : 0) 1045 | ((status & UART_RING) ? TIOCM_RI : 0) 1046 | ((status & UART_DCD) ? TIOCM_CD : 0); 1047 1048 dev_dbg(&port->dev, "%s - result = %x\n", __func__, result); 1049 1050 return result; 1051} 1052 1053static int pl2303_carrier_raised(struct usb_serial_port *port) 1054{ 1055 struct pl2303_private *priv = usb_get_serial_port_data(port); 1056 1057 if (priv->line_status & UART_DCD) 1058 return 1; 1059 1060 return 0; 1061} 1062 1063static int pl2303_set_break(struct usb_serial_port *port, bool enable) 1064{ 1065 struct usb_serial *serial = port->serial; 1066 u16 state; 1067 int result; 1068 1069 if (enable) 1070 state = BREAK_ON; 1071 else 1072 state = BREAK_OFF; 1073 1074 dev_dbg(&port->dev, "%s - turning break %s\n", __func__, 1075 state == BREAK_OFF ? "off" : "on"); 1076 1077 result = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), 1078 BREAK_REQUEST, BREAK_REQUEST_TYPE, state, 1079 0, NULL, 0, 100); 1080 if (result) { 1081 dev_err(&port->dev, "error sending break = %d\n", result); 1082 return result; 1083 } 1084 1085 return 0; 1086} 1087 1088static int pl2303_break_ctl(struct tty_struct *tty, int state) 1089{ 1090 struct usb_serial_port *port = tty->driver_data; 1091 1092 return pl2303_set_break(port, state); 1093} 1094 1095static void pl2303_update_line_status(struct usb_serial_port *port, 1096 unsigned char *data, 1097 unsigned int actual_length) 1098{ 1099 struct usb_serial *serial = port->serial; 1100 struct pl2303_serial_private *spriv = usb_get_serial_data(serial); 1101 struct pl2303_private *priv = usb_get_serial_port_data(port); 1102 struct tty_struct *tty; 1103 unsigned long flags; 1104 unsigned int status_idx = UART_STATE_INDEX; 1105 u8 status; 1106 u8 delta; 1107 1108 if (spriv->quirks & PL2303_QUIRK_UART_STATE_IDX0) 1109 status_idx = 0; 1110 1111 if (actual_length < status_idx + 1) 1112 return; 1113 1114 status = data[status_idx]; 1115 1116 /* Save off the uart status for others to look at */ 1117 spin_lock_irqsave(&priv->lock, flags); 1118 delta = priv->line_status ^ status; 1119 priv->line_status = status; 1120 spin_unlock_irqrestore(&priv->lock, flags); 1121 1122 if (status & UART_BREAK_ERROR) 1123 usb_serial_handle_break(port); 1124 1125 if (delta & UART_STATE_MSR_MASK) { 1126 if (delta & UART_CTS) 1127 port->icount.cts++; 1128 if (delta & UART_DSR) 1129 port->icount.dsr++; 1130 if (delta & UART_RING) 1131 port->icount.rng++; 1132 if (delta & UART_DCD) { 1133 port->icount.dcd++; 1134 tty = tty_port_tty_get(&port->port); 1135 if (tty) { 1136 usb_serial_handle_dcd_change(port, tty, 1137 status & UART_DCD); 1138 tty_kref_put(tty); 1139 } 1140 } 1141 1142 wake_up_interruptible(&port->port.delta_msr_wait); 1143 } 1144} 1145 1146static void pl2303_read_int_callback(struct urb *urb) 1147{ 1148 struct usb_serial_port *port = urb->context; 1149 unsigned char *data = urb->transfer_buffer; 1150 unsigned int actual_length = urb->actual_length; 1151 int status = urb->status; 1152 int retval; 1153 1154 switch (status) { 1155 case 0: 1156 /* success */ 1157 break; 1158 case -ECONNRESET: 1159 case -ENOENT: 1160 case -ESHUTDOWN: 1161 /* this urb is terminated, clean up */ 1162 dev_dbg(&port->dev, "%s - urb shutting down with status: %d\n", 1163 __func__, status); 1164 return; 1165 default: 1166 dev_dbg(&port->dev, "%s - nonzero urb status received: %d\n", 1167 __func__, status); 1168 goto exit; 1169 } 1170 1171 usb_serial_debug_data(&port->dev, __func__, 1172 urb->actual_length, urb->transfer_buffer); 1173 1174 pl2303_update_line_status(port, data, actual_length); 1175 1176exit: 1177 retval = usb_submit_urb(urb, GFP_ATOMIC); 1178 if (retval) { 1179 dev_err(&port->dev, 1180 "%s - usb_submit_urb failed with result %d\n", 1181 __func__, retval); 1182 } 1183} 1184 1185static void pl2303_process_read_urb(struct urb *urb) 1186{ 1187 struct usb_serial_port *port = urb->context; 1188 struct pl2303_private *priv = usb_get_serial_port_data(port); 1189 unsigned char *data = urb->transfer_buffer; 1190 char tty_flag = TTY_NORMAL; 1191 unsigned long flags; 1192 u8 line_status; 1193 int i; 1194 1195 /* update line status */ 1196 spin_lock_irqsave(&priv->lock, flags); 1197 line_status = priv->line_status; 1198 priv->line_status &= ~UART_STATE_TRANSIENT_MASK; 1199 spin_unlock_irqrestore(&priv->lock, flags); 1200 1201 if (!urb->actual_length) 1202 return; 1203 1204 /* 1205 * Break takes precedence over parity, which takes precedence over 1206 * framing errors. 1207 */ 1208 if (line_status & UART_BREAK_ERROR) 1209 tty_flag = TTY_BREAK; 1210 else if (line_status & UART_PARITY_ERROR) 1211 tty_flag = TTY_PARITY; 1212 else if (line_status & UART_FRAME_ERROR) 1213 tty_flag = TTY_FRAME; 1214 1215 if (tty_flag != TTY_NORMAL) 1216 dev_dbg(&port->dev, "%s - tty_flag = %d\n", __func__, 1217 tty_flag); 1218 /* overrun is special, not associated with a char */ 1219 if (line_status & UART_OVERRUN_ERROR) 1220 tty_insert_flip_char(&port->port, 0, TTY_OVERRUN); 1221 1222 if (port->sysrq) { 1223 for (i = 0; i < urb->actual_length; ++i) 1224 if (!usb_serial_handle_sysrq_char(port, data[i])) 1225 tty_insert_flip_char(&port->port, data[i], 1226 tty_flag); 1227 } else { 1228 tty_insert_flip_string_fixed_flag(&port->port, data, tty_flag, 1229 urb->actual_length); 1230 } 1231 1232 tty_flip_buffer_push(&port->port); 1233} 1234 1235static struct usb_serial_driver pl2303_device = { 1236 .driver = { 1237 .owner = THIS_MODULE, 1238 .name = "pl2303", 1239 }, 1240 .id_table = id_table, 1241 .num_bulk_in = 1, 1242 .num_bulk_out = 1, 1243 .num_interrupt_in = 0, /* see pl2303_calc_num_ports */ 1244 .bulk_in_size = 256, 1245 .bulk_out_size = 256, 1246 .open = pl2303_open, 1247 .close = pl2303_close, 1248 .dtr_rts = pl2303_dtr_rts, 1249 .carrier_raised = pl2303_carrier_raised, 1250 .break_ctl = pl2303_break_ctl, 1251 .set_termios = pl2303_set_termios, 1252 .tiocmget = pl2303_tiocmget, 1253 .tiocmset = pl2303_tiocmset, 1254 .tiocmiwait = usb_serial_generic_tiocmiwait, 1255 .process_read_urb = pl2303_process_read_urb, 1256 .read_int_callback = pl2303_read_int_callback, 1257 .probe = pl2303_probe, 1258 .calc_num_ports = pl2303_calc_num_ports, 1259 .attach = pl2303_startup, 1260 .release = pl2303_release, 1261 .port_probe = pl2303_port_probe, 1262 .port_remove = pl2303_port_remove, 1263}; 1264 1265static struct usb_serial_driver * const serial_drivers[] = { 1266 &pl2303_device, NULL 1267}; 1268 1269module_usb_serial_driver(serial_drivers, id_table); 1270 1271MODULE_DESCRIPTION("Prolific PL2303 USB to serial adaptor driver"); 1272MODULE_LICENSE("GPL v2"); 1273