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 { USB_DEVICE(IBM_VENDOR_ID, IBM_PRODUCT_ID) }, 120 { } /* Terminating entry */ 121 }; 122 123 MODULE_DEVICE_TABLE(usb, id_table); 124 125 #define SET_LINE_REQUEST_TYPE 0x21 126 #define SET_LINE_REQUEST 0x20 127 128 #define SET_CONTROL_REQUEST_TYPE 0x21 129 #define SET_CONTROL_REQUEST 0x22 130 #define CONTROL_DTR 0x01 131 #define CONTROL_RTS 0x02 132 133 #define BREAK_REQUEST_TYPE 0x21 134 #define BREAK_REQUEST 0x23 135 #define BREAK_ON 0xffff 136 #define BREAK_OFF 0x0000 137 138 #define GET_LINE_REQUEST_TYPE 0xa1 139 #define GET_LINE_REQUEST 0x21 140 141 #define VENDOR_WRITE_REQUEST_TYPE 0x40 142 #define VENDOR_WRITE_REQUEST 0x01 143 #define VENDOR_WRITE_NREQUEST 0x80 144 145 #define VENDOR_READ_REQUEST_TYPE 0xc0 146 #define VENDOR_READ_REQUEST 0x01 147 #define VENDOR_READ_NREQUEST 0x81 148 149 #define UART_STATE_INDEX 8 150 #define UART_STATE_MSR_MASK 0x8b 151 #define UART_STATE_TRANSIENT_MASK 0x74 152 #define UART_DCD 0x01 153 #define UART_DSR 0x02 154 #define UART_BREAK_ERROR 0x04 155 #define UART_RING 0x08 156 #define UART_FRAME_ERROR 0x10 157 #define UART_PARITY_ERROR 0x20 158 #define UART_OVERRUN_ERROR 0x40 159 #define UART_CTS 0x80 160 161 #define PL2303_FLOWCTRL_MASK 0xf0 162 163 #define PL2303_READ_TYPE_HX_STATUS 0x8080 164 165 #define PL2303_HXN_RESET_REG 0x07 166 #define PL2303_HXN_RESET_UPSTREAM_PIPE 0x02 167 #define PL2303_HXN_RESET_DOWNSTREAM_PIPE 0x01 168 169 #define PL2303_HXN_FLOWCTRL_REG 0x0a 170 #define PL2303_HXN_FLOWCTRL_MASK 0x1c 171 #define PL2303_HXN_FLOWCTRL_NONE 0x1c 172 #define PL2303_HXN_FLOWCTRL_RTS_CTS 0x18 173 #define PL2303_HXN_FLOWCTRL_XON_XOFF 0x0c 174 175 static void pl2303_set_break(struct usb_serial_port *port, bool enable); 176 177 enum pl2303_type { 178 TYPE_H, 179 TYPE_HX, 180 TYPE_TA, 181 TYPE_TB, 182 TYPE_HXD, 183 TYPE_HXN, 184 TYPE_COUNT 185 }; 186 187 struct pl2303_type_data { 188 const char *name; 189 speed_t max_baud_rate; 190 unsigned long quirks; 191 unsigned int no_autoxonxoff:1; 192 unsigned int no_divisors:1; 193 unsigned int alt_divisors:1; 194 }; 195 196 struct pl2303_serial_private { 197 const struct pl2303_type_data *type; 198 unsigned long quirks; 199 }; 200 201 struct pl2303_private { 202 spinlock_t lock; 203 u8 line_control; 204 u8 line_status; 205 206 u8 line_settings[7]; 207 }; 208 209 static const struct pl2303_type_data pl2303_type_data[TYPE_COUNT] = { 210 [TYPE_H] = { 211 .name = "H", 212 .max_baud_rate = 1228800, 213 .quirks = PL2303_QUIRK_LEGACY, 214 .no_autoxonxoff = true, 215 }, 216 [TYPE_HX] = { 217 .name = "HX", 218 .max_baud_rate = 6000000, 219 }, 220 [TYPE_TA] = { 221 .name = "TA", 222 .max_baud_rate = 6000000, 223 .alt_divisors = true, 224 }, 225 [TYPE_TB] = { 226 .name = "TB", 227 .max_baud_rate = 12000000, 228 .alt_divisors = true, 229 }, 230 [TYPE_HXD] = { 231 .name = "HXD", 232 .max_baud_rate = 12000000, 233 }, 234 [TYPE_HXN] = { 235 .name = "G", 236 .max_baud_rate = 12000000, 237 .no_divisors = true, 238 }, 239 }; 240 241 static int pl2303_vendor_read(struct usb_serial *serial, u16 value, 242 unsigned char buf[1]) 243 { 244 struct pl2303_serial_private *spriv = usb_get_serial_data(serial); 245 struct device *dev = &serial->interface->dev; 246 u8 request; 247 int res; 248 249 if (spriv->type == &pl2303_type_data[TYPE_HXN]) 250 request = VENDOR_READ_NREQUEST; 251 else 252 request = VENDOR_READ_REQUEST; 253 254 res = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0), 255 request, VENDOR_READ_REQUEST_TYPE, 256 value, 0, buf, 1, 100); 257 if (res != 1) { 258 dev_err(dev, "%s - failed to read [%04x]: %d\n", __func__, 259 value, res); 260 if (res >= 0) 261 res = -EIO; 262 263 return res; 264 } 265 266 dev_dbg(dev, "%s - [%04x] = %02x\n", __func__, value, buf[0]); 267 268 return 0; 269 } 270 271 static int pl2303_vendor_write(struct usb_serial *serial, u16 value, u16 index) 272 { 273 struct pl2303_serial_private *spriv = usb_get_serial_data(serial); 274 struct device *dev = &serial->interface->dev; 275 u8 request; 276 int res; 277 278 dev_dbg(dev, "%s - [%04x] = %02x\n", __func__, value, index); 279 280 if (spriv->type == &pl2303_type_data[TYPE_HXN]) 281 request = VENDOR_WRITE_NREQUEST; 282 else 283 request = VENDOR_WRITE_REQUEST; 284 285 res = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), 286 request, VENDOR_WRITE_REQUEST_TYPE, 287 value, index, NULL, 0, 100); 288 if (res) { 289 dev_err(dev, "%s - failed to write [%04x]: %d\n", __func__, 290 value, res); 291 return res; 292 } 293 294 return 0; 295 } 296 297 static int pl2303_update_reg(struct usb_serial *serial, u8 reg, u8 mask, u8 val) 298 { 299 struct pl2303_serial_private *spriv = usb_get_serial_data(serial); 300 int ret = 0; 301 u8 *buf; 302 303 buf = kmalloc(1, GFP_KERNEL); 304 if (!buf) 305 return -ENOMEM; 306 307 if (spriv->type == &pl2303_type_data[TYPE_HXN]) 308 ret = pl2303_vendor_read(serial, reg, buf); 309 else 310 ret = pl2303_vendor_read(serial, reg | 0x80, buf); 311 312 if (ret) 313 goto out_free; 314 315 *buf &= ~mask; 316 *buf |= val & mask; 317 318 ret = pl2303_vendor_write(serial, reg, *buf); 319 out_free: 320 kfree(buf); 321 322 return ret; 323 } 324 325 static int pl2303_probe(struct usb_serial *serial, 326 const struct usb_device_id *id) 327 { 328 usb_set_serial_data(serial, (void *)id->driver_info); 329 330 return 0; 331 } 332 333 /* 334 * Use interrupt endpoint from first interface if available. 335 * 336 * This is needed due to the looney way its endpoints are set up. 337 */ 338 static int pl2303_endpoint_hack(struct usb_serial *serial, 339 struct usb_serial_endpoints *epds) 340 { 341 struct usb_interface *interface = serial->interface; 342 struct usb_device *dev = serial->dev; 343 struct device *ddev = &interface->dev; 344 struct usb_host_interface *iface_desc; 345 struct usb_endpoint_descriptor *endpoint; 346 unsigned int i; 347 348 if (interface == dev->actconfig->interface[0]) 349 return 0; 350 351 /* check out the endpoints of the other interface */ 352 iface_desc = dev->actconfig->interface[0]->cur_altsetting; 353 354 for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) { 355 endpoint = &iface_desc->endpoint[i].desc; 356 357 if (!usb_endpoint_is_int_in(endpoint)) 358 continue; 359 360 dev_dbg(ddev, "found interrupt in on separate interface\n"); 361 if (epds->num_interrupt_in < ARRAY_SIZE(epds->interrupt_in)) 362 epds->interrupt_in[epds->num_interrupt_in++] = endpoint; 363 } 364 365 return 0; 366 } 367 368 static int pl2303_calc_num_ports(struct usb_serial *serial, 369 struct usb_serial_endpoints *epds) 370 { 371 unsigned long quirks = (unsigned long)usb_get_serial_data(serial); 372 struct device *dev = &serial->interface->dev; 373 int ret; 374 375 if (quirks & PL2303_QUIRK_ENDPOINT_HACK) { 376 ret = pl2303_endpoint_hack(serial, epds); 377 if (ret) 378 return ret; 379 } 380 381 if (epds->num_interrupt_in < 1) { 382 dev_err(dev, "required interrupt-in endpoint missing\n"); 383 return -ENODEV; 384 } 385 386 return 1; 387 } 388 389 static bool pl2303_supports_hx_status(struct usb_serial *serial) 390 { 391 int ret; 392 u8 buf; 393 394 ret = usb_control_msg_recv(serial->dev, 0, VENDOR_READ_REQUEST, 395 VENDOR_READ_REQUEST_TYPE, PL2303_READ_TYPE_HX_STATUS, 396 0, &buf, 1, 100, GFP_KERNEL); 397 398 return ret == 0; 399 } 400 401 static int pl2303_detect_type(struct usb_serial *serial) 402 { 403 struct usb_device_descriptor *desc = &serial->dev->descriptor; 404 u16 bcdDevice, bcdUSB; 405 406 /* 407 * Legacy PL2303H, variants 0 and 1 (difference unknown). 408 */ 409 if (desc->bDeviceClass == 0x02) 410 return TYPE_H; /* variant 0 */ 411 412 if (desc->bMaxPacketSize0 != 0x40) { 413 if (desc->bDeviceClass == 0x00 || desc->bDeviceClass == 0xff) 414 return TYPE_H; /* variant 1 */ 415 416 return TYPE_H; /* variant 0 */ 417 } 418 419 bcdDevice = le16_to_cpu(desc->bcdDevice); 420 bcdUSB = le16_to_cpu(desc->bcdUSB); 421 422 switch (bcdUSB) { 423 case 0x110: 424 switch (bcdDevice) { 425 case 0x300: 426 return TYPE_HX; 427 case 0x400: 428 return TYPE_HXD; 429 default: 430 return TYPE_HX; 431 } 432 break; 433 case 0x200: 434 switch (bcdDevice) { 435 case 0x100: 436 case 0x105: 437 case 0x305: 438 case 0x405: 439 case 0x605: 440 /* 441 * Assume it's an HXN-type if the device doesn't 442 * support the old read request value. 443 */ 444 if (!pl2303_supports_hx_status(serial)) 445 return TYPE_HXN; 446 break; 447 case 0x300: 448 return TYPE_TA; 449 case 0x500: 450 return TYPE_TB; 451 } 452 break; 453 } 454 455 dev_err(&serial->interface->dev, 456 "unknown device type, please report to linux-usb@vger.kernel.org\n"); 457 return -ENODEV; 458 } 459 460 static int pl2303_startup(struct usb_serial *serial) 461 { 462 struct pl2303_serial_private *spriv; 463 enum pl2303_type type; 464 unsigned char *buf; 465 int ret; 466 467 ret = pl2303_detect_type(serial); 468 if (ret < 0) 469 return ret; 470 471 type = ret; 472 dev_dbg(&serial->interface->dev, "device type: %s\n", pl2303_type_data[type].name); 473 474 spriv = kzalloc(sizeof(*spriv), GFP_KERNEL); 475 if (!spriv) 476 return -ENOMEM; 477 478 spriv->type = &pl2303_type_data[type]; 479 spriv->quirks = (unsigned long)usb_get_serial_data(serial); 480 spriv->quirks |= spriv->type->quirks; 481 482 usb_set_serial_data(serial, spriv); 483 484 if (type != TYPE_HXN) { 485 buf = kmalloc(1, GFP_KERNEL); 486 if (!buf) { 487 kfree(spriv); 488 return -ENOMEM; 489 } 490 491 pl2303_vendor_read(serial, 0x8484, buf); 492 pl2303_vendor_write(serial, 0x0404, 0); 493 pl2303_vendor_read(serial, 0x8484, buf); 494 pl2303_vendor_read(serial, 0x8383, buf); 495 pl2303_vendor_read(serial, 0x8484, buf); 496 pl2303_vendor_write(serial, 0x0404, 1); 497 pl2303_vendor_read(serial, 0x8484, buf); 498 pl2303_vendor_read(serial, 0x8383, buf); 499 pl2303_vendor_write(serial, 0, 1); 500 pl2303_vendor_write(serial, 1, 0); 501 if (spriv->quirks & PL2303_QUIRK_LEGACY) 502 pl2303_vendor_write(serial, 2, 0x24); 503 else 504 pl2303_vendor_write(serial, 2, 0x44); 505 506 kfree(buf); 507 } 508 509 return 0; 510 } 511 512 static void pl2303_release(struct usb_serial *serial) 513 { 514 struct pl2303_serial_private *spriv = usb_get_serial_data(serial); 515 516 kfree(spriv); 517 } 518 519 static int pl2303_port_probe(struct usb_serial_port *port) 520 { 521 struct pl2303_private *priv; 522 523 priv = kzalloc(sizeof(*priv), GFP_KERNEL); 524 if (!priv) 525 return -ENOMEM; 526 527 spin_lock_init(&priv->lock); 528 529 usb_set_serial_port_data(port, priv); 530 531 port->port.drain_delay = 256; 532 533 return 0; 534 } 535 536 static void pl2303_port_remove(struct usb_serial_port *port) 537 { 538 struct pl2303_private *priv = usb_get_serial_port_data(port); 539 540 kfree(priv); 541 } 542 543 static int pl2303_set_control_lines(struct usb_serial_port *port, u8 value) 544 { 545 struct usb_device *dev = port->serial->dev; 546 int retval; 547 548 dev_dbg(&port->dev, "%s - %02x\n", __func__, value); 549 550 retval = usb_control_msg(dev, usb_sndctrlpipe(dev, 0), 551 SET_CONTROL_REQUEST, SET_CONTROL_REQUEST_TYPE, 552 value, 0, NULL, 0, 100); 553 if (retval) 554 dev_err(&port->dev, "%s - failed: %d\n", __func__, retval); 555 556 return retval; 557 } 558 559 /* 560 * Returns the nearest supported baud rate that can be set directly without 561 * using divisors. 562 */ 563 static speed_t pl2303_get_supported_baud_rate(speed_t baud) 564 { 565 static const speed_t baud_sup[] = { 566 75, 150, 300, 600, 1200, 1800, 2400, 3600, 4800, 7200, 9600, 567 14400, 19200, 28800, 38400, 57600, 115200, 230400, 460800, 568 614400, 921600, 1228800, 2457600, 3000000, 6000000 569 }; 570 571 unsigned i; 572 573 for (i = 0; i < ARRAY_SIZE(baud_sup); ++i) { 574 if (baud_sup[i] > baud) 575 break; 576 } 577 578 if (i == ARRAY_SIZE(baud_sup)) 579 baud = baud_sup[i - 1]; 580 else if (i > 0 && (baud_sup[i] - baud) > (baud - baud_sup[i - 1])) 581 baud = baud_sup[i - 1]; 582 else 583 baud = baud_sup[i]; 584 585 return baud; 586 } 587 588 /* 589 * NOTE: If unsupported baud rates are set directly, the PL2303 seems to 590 * use 9600 baud. 591 */ 592 static speed_t pl2303_encode_baud_rate_direct(unsigned char buf[4], 593 speed_t baud) 594 { 595 put_unaligned_le32(baud, buf); 596 597 return baud; 598 } 599 600 static speed_t pl2303_encode_baud_rate_divisor(unsigned char buf[4], 601 speed_t baud) 602 { 603 unsigned int baseline, mantissa, exponent; 604 605 /* 606 * Apparently the formula is: 607 * baudrate = 12M * 32 / (mantissa * 4^exponent) 608 * where 609 * mantissa = buf[8:0] 610 * exponent = buf[11:9] 611 */ 612 baseline = 12000000 * 32; 613 mantissa = baseline / baud; 614 if (mantissa == 0) 615 mantissa = 1; /* Avoid dividing by zero if baud > 32*12M. */ 616 exponent = 0; 617 while (mantissa >= 512) { 618 if (exponent < 7) { 619 mantissa >>= 2; /* divide by 4 */ 620 exponent++; 621 } else { 622 /* Exponent is maxed. Trim mantissa and leave. */ 623 mantissa = 511; 624 break; 625 } 626 } 627 628 buf[3] = 0x80; 629 buf[2] = 0; 630 buf[1] = exponent << 1 | mantissa >> 8; 631 buf[0] = mantissa & 0xff; 632 633 /* Calculate and return the exact baud rate. */ 634 baud = (baseline / mantissa) >> (exponent << 1); 635 636 return baud; 637 } 638 639 static speed_t pl2303_encode_baud_rate_divisor_alt(unsigned char buf[4], 640 speed_t baud) 641 { 642 unsigned int baseline, mantissa, exponent; 643 644 /* 645 * Apparently, for the TA version the formula is: 646 * baudrate = 12M * 32 / (mantissa * 2^exponent) 647 * where 648 * mantissa = buf[10:0] 649 * exponent = buf[15:13 16] 650 */ 651 baseline = 12000000 * 32; 652 mantissa = baseline / baud; 653 if (mantissa == 0) 654 mantissa = 1; /* Avoid dividing by zero if baud > 32*12M. */ 655 exponent = 0; 656 while (mantissa >= 2048) { 657 if (exponent < 15) { 658 mantissa >>= 1; /* divide by 2 */ 659 exponent++; 660 } else { 661 /* Exponent is maxed. Trim mantissa and leave. */ 662 mantissa = 2047; 663 break; 664 } 665 } 666 667 buf[3] = 0x80; 668 buf[2] = exponent & 0x01; 669 buf[1] = (exponent & ~0x01) << 4 | mantissa >> 8; 670 buf[0] = mantissa & 0xff; 671 672 /* Calculate and return the exact baud rate. */ 673 baud = (baseline / mantissa) >> exponent; 674 675 return baud; 676 } 677 678 static void pl2303_encode_baud_rate(struct tty_struct *tty, 679 struct usb_serial_port *port, 680 u8 buf[4]) 681 { 682 struct usb_serial *serial = port->serial; 683 struct pl2303_serial_private *spriv = usb_get_serial_data(serial); 684 speed_t baud_sup; 685 speed_t baud; 686 687 baud = tty_get_baud_rate(tty); 688 dev_dbg(&port->dev, "baud requested = %u\n", baud); 689 if (!baud) 690 return; 691 692 if (spriv->type->max_baud_rate) 693 baud = min_t(speed_t, baud, spriv->type->max_baud_rate); 694 /* 695 * Use direct method for supported baud rates, otherwise use divisors. 696 * Newer chip types do not support divisor encoding. 697 */ 698 if (spriv->type->no_divisors) 699 baud_sup = baud; 700 else 701 baud_sup = pl2303_get_supported_baud_rate(baud); 702 703 if (baud == baud_sup) 704 baud = pl2303_encode_baud_rate_direct(buf, baud); 705 else if (spriv->type->alt_divisors) 706 baud = pl2303_encode_baud_rate_divisor_alt(buf, baud); 707 else 708 baud = pl2303_encode_baud_rate_divisor(buf, baud); 709 710 /* Save resulting baud rate */ 711 tty_encode_baud_rate(tty, baud, baud); 712 dev_dbg(&port->dev, "baud set = %u\n", baud); 713 } 714 715 static int pl2303_get_line_request(struct usb_serial_port *port, 716 unsigned char buf[7]) 717 { 718 struct usb_device *udev = port->serial->dev; 719 int ret; 720 721 ret = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0), 722 GET_LINE_REQUEST, GET_LINE_REQUEST_TYPE, 723 0, 0, buf, 7, 100); 724 if (ret != 7) { 725 dev_err(&port->dev, "%s - failed: %d\n", __func__, ret); 726 727 if (ret >= 0) 728 ret = -EIO; 729 730 return ret; 731 } 732 733 dev_dbg(&port->dev, "%s - %7ph\n", __func__, buf); 734 735 return 0; 736 } 737 738 static int pl2303_set_line_request(struct usb_serial_port *port, 739 unsigned char buf[7]) 740 { 741 struct usb_device *udev = port->serial->dev; 742 int ret; 743 744 ret = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), 745 SET_LINE_REQUEST, SET_LINE_REQUEST_TYPE, 746 0, 0, buf, 7, 100); 747 if (ret < 0) { 748 dev_err(&port->dev, "%s - failed: %d\n", __func__, ret); 749 return ret; 750 } 751 752 dev_dbg(&port->dev, "%s - %7ph\n", __func__, buf); 753 754 return 0; 755 } 756 757 static bool pl2303_termios_change(const struct ktermios *a, const struct ktermios *b) 758 { 759 bool ixon_change; 760 761 ixon_change = ((a->c_iflag ^ b->c_iflag) & (IXON | IXANY)) || 762 a->c_cc[VSTART] != b->c_cc[VSTART] || 763 a->c_cc[VSTOP] != b->c_cc[VSTOP]; 764 765 return tty_termios_hw_change(a, b) || ixon_change; 766 } 767 768 static bool pl2303_enable_xonxoff(struct tty_struct *tty, const struct pl2303_type_data *type) 769 { 770 if (!I_IXON(tty) || I_IXANY(tty)) 771 return false; 772 773 if (START_CHAR(tty) != 0x11 || STOP_CHAR(tty) != 0x13) 774 return false; 775 776 if (type->no_autoxonxoff) 777 return false; 778 779 return true; 780 } 781 782 static void pl2303_set_termios(struct tty_struct *tty, 783 struct usb_serial_port *port, struct ktermios *old_termios) 784 { 785 struct usb_serial *serial = port->serial; 786 struct pl2303_serial_private *spriv = usb_get_serial_data(serial); 787 struct pl2303_private *priv = usb_get_serial_port_data(port); 788 unsigned long flags; 789 unsigned char *buf; 790 int ret; 791 u8 control; 792 793 if (old_termios && !pl2303_termios_change(&tty->termios, old_termios)) 794 return; 795 796 buf = kzalloc(7, GFP_KERNEL); 797 if (!buf) { 798 /* Report back no change occurred */ 799 if (old_termios) 800 tty->termios = *old_termios; 801 return; 802 } 803 804 pl2303_get_line_request(port, buf); 805 806 buf[6] = tty_get_char_size(tty->termios.c_cflag); 807 dev_dbg(&port->dev, "data bits = %d\n", buf[6]); 808 809 /* For reference buf[0]:buf[3] baud rate value */ 810 pl2303_encode_baud_rate(tty, port, &buf[0]); 811 812 /* For reference buf[4]=0 is 1 stop bits */ 813 /* For reference buf[4]=1 is 1.5 stop bits */ 814 /* For reference buf[4]=2 is 2 stop bits */ 815 if (C_CSTOPB(tty)) { 816 /* 817 * NOTE: Comply with "real" UARTs / RS232: 818 * use 1.5 instead of 2 stop bits with 5 data bits 819 */ 820 if (C_CSIZE(tty) == CS5) { 821 buf[4] = 1; 822 dev_dbg(&port->dev, "stop bits = 1.5\n"); 823 } else { 824 buf[4] = 2; 825 dev_dbg(&port->dev, "stop bits = 2\n"); 826 } 827 } else { 828 buf[4] = 0; 829 dev_dbg(&port->dev, "stop bits = 1\n"); 830 } 831 832 if (C_PARENB(tty)) { 833 /* For reference buf[5]=0 is none parity */ 834 /* For reference buf[5]=1 is odd parity */ 835 /* For reference buf[5]=2 is even parity */ 836 /* For reference buf[5]=3 is mark parity */ 837 /* For reference buf[5]=4 is space parity */ 838 if (C_PARODD(tty)) { 839 if (C_CMSPAR(tty)) { 840 buf[5] = 3; 841 dev_dbg(&port->dev, "parity = mark\n"); 842 } else { 843 buf[5] = 1; 844 dev_dbg(&port->dev, "parity = odd\n"); 845 } 846 } else { 847 if (C_CMSPAR(tty)) { 848 buf[5] = 4; 849 dev_dbg(&port->dev, "parity = space\n"); 850 } else { 851 buf[5] = 2; 852 dev_dbg(&port->dev, "parity = even\n"); 853 } 854 } 855 } else { 856 buf[5] = 0; 857 dev_dbg(&port->dev, "parity = none\n"); 858 } 859 860 /* 861 * Some PL2303 are known to lose bytes if you change serial settings 862 * even to the same values as before. Thus we actually need to filter 863 * in this specific case. 864 * 865 * Note that the tty_termios_hw_change check above is not sufficient 866 * as a previously requested baud rate may differ from the one 867 * actually used (and stored in old_termios). 868 * 869 * NOTE: No additional locking needed for line_settings as it is 870 * only used in set_termios, which is serialised against itself. 871 */ 872 if (!old_termios || memcmp(buf, priv->line_settings, 7)) { 873 ret = pl2303_set_line_request(port, buf); 874 if (!ret) 875 memcpy(priv->line_settings, buf, 7); 876 } 877 878 /* change control lines if we are switching to or from B0 */ 879 spin_lock_irqsave(&priv->lock, flags); 880 control = priv->line_control; 881 if (C_BAUD(tty) == B0) 882 priv->line_control &= ~(CONTROL_DTR | CONTROL_RTS); 883 else if (old_termios && (old_termios->c_cflag & CBAUD) == B0) 884 priv->line_control |= (CONTROL_DTR | CONTROL_RTS); 885 if (control != priv->line_control) { 886 control = priv->line_control; 887 spin_unlock_irqrestore(&priv->lock, flags); 888 pl2303_set_control_lines(port, control); 889 } else { 890 spin_unlock_irqrestore(&priv->lock, flags); 891 } 892 893 if (C_CRTSCTS(tty)) { 894 if (spriv->quirks & PL2303_QUIRK_LEGACY) { 895 pl2303_update_reg(serial, 0, PL2303_FLOWCTRL_MASK, 0x40); 896 } else if (spriv->type == &pl2303_type_data[TYPE_HXN]) { 897 pl2303_update_reg(serial, PL2303_HXN_FLOWCTRL_REG, 898 PL2303_HXN_FLOWCTRL_MASK, 899 PL2303_HXN_FLOWCTRL_RTS_CTS); 900 } else { 901 pl2303_update_reg(serial, 0, PL2303_FLOWCTRL_MASK, 0x60); 902 } 903 } else if (pl2303_enable_xonxoff(tty, spriv->type)) { 904 if (spriv->type == &pl2303_type_data[TYPE_HXN]) { 905 pl2303_update_reg(serial, PL2303_HXN_FLOWCTRL_REG, 906 PL2303_HXN_FLOWCTRL_MASK, 907 PL2303_HXN_FLOWCTRL_XON_XOFF); 908 } else { 909 pl2303_update_reg(serial, 0, PL2303_FLOWCTRL_MASK, 0xc0); 910 } 911 } else { 912 if (spriv->type == &pl2303_type_data[TYPE_HXN]) { 913 pl2303_update_reg(serial, PL2303_HXN_FLOWCTRL_REG, 914 PL2303_HXN_FLOWCTRL_MASK, 915 PL2303_HXN_FLOWCTRL_NONE); 916 } else { 917 pl2303_update_reg(serial, 0, PL2303_FLOWCTRL_MASK, 0); 918 } 919 } 920 921 kfree(buf); 922 } 923 924 static void pl2303_dtr_rts(struct usb_serial_port *port, int on) 925 { 926 struct pl2303_private *priv = usb_get_serial_port_data(port); 927 unsigned long flags; 928 u8 control; 929 930 spin_lock_irqsave(&priv->lock, flags); 931 if (on) 932 priv->line_control |= (CONTROL_DTR | CONTROL_RTS); 933 else 934 priv->line_control &= ~(CONTROL_DTR | CONTROL_RTS); 935 control = priv->line_control; 936 spin_unlock_irqrestore(&priv->lock, flags); 937 938 pl2303_set_control_lines(port, control); 939 } 940 941 static void pl2303_close(struct usb_serial_port *port) 942 { 943 usb_serial_generic_close(port); 944 usb_kill_urb(port->interrupt_in_urb); 945 pl2303_set_break(port, false); 946 } 947 948 static int pl2303_open(struct tty_struct *tty, struct usb_serial_port *port) 949 { 950 struct usb_serial *serial = port->serial; 951 struct pl2303_serial_private *spriv = usb_get_serial_data(serial); 952 int result; 953 954 if (spriv->quirks & PL2303_QUIRK_LEGACY) { 955 usb_clear_halt(serial->dev, port->write_urb->pipe); 956 usb_clear_halt(serial->dev, port->read_urb->pipe); 957 } else { 958 /* reset upstream data pipes */ 959 if (spriv->type == &pl2303_type_data[TYPE_HXN]) { 960 pl2303_vendor_write(serial, PL2303_HXN_RESET_REG, 961 PL2303_HXN_RESET_UPSTREAM_PIPE | 962 PL2303_HXN_RESET_DOWNSTREAM_PIPE); 963 } else { 964 pl2303_vendor_write(serial, 8, 0); 965 pl2303_vendor_write(serial, 9, 0); 966 } 967 } 968 969 /* Setup termios */ 970 if (tty) 971 pl2303_set_termios(tty, port, NULL); 972 973 result = usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL); 974 if (result) { 975 dev_err(&port->dev, "failed to submit interrupt urb: %d\n", 976 result); 977 return result; 978 } 979 980 result = usb_serial_generic_open(tty, port); 981 if (result) { 982 usb_kill_urb(port->interrupt_in_urb); 983 return result; 984 } 985 986 return 0; 987 } 988 989 static int pl2303_tiocmset(struct tty_struct *tty, 990 unsigned int set, unsigned int clear) 991 { 992 struct usb_serial_port *port = tty->driver_data; 993 struct pl2303_private *priv = usb_get_serial_port_data(port); 994 unsigned long flags; 995 u8 control; 996 int ret; 997 998 spin_lock_irqsave(&priv->lock, flags); 999 if (set & TIOCM_RTS) 1000 priv->line_control |= CONTROL_RTS; 1001 if (set & TIOCM_DTR) 1002 priv->line_control |= CONTROL_DTR; 1003 if (clear & TIOCM_RTS) 1004 priv->line_control &= ~CONTROL_RTS; 1005 if (clear & TIOCM_DTR) 1006 priv->line_control &= ~CONTROL_DTR; 1007 control = priv->line_control; 1008 spin_unlock_irqrestore(&priv->lock, flags); 1009 1010 ret = pl2303_set_control_lines(port, control); 1011 if (ret) 1012 return usb_translate_errors(ret); 1013 1014 return 0; 1015 } 1016 1017 static int pl2303_tiocmget(struct tty_struct *tty) 1018 { 1019 struct usb_serial_port *port = tty->driver_data; 1020 struct pl2303_private *priv = usb_get_serial_port_data(port); 1021 unsigned long flags; 1022 unsigned int mcr; 1023 unsigned int status; 1024 unsigned int result; 1025 1026 spin_lock_irqsave(&priv->lock, flags); 1027 mcr = priv->line_control; 1028 status = priv->line_status; 1029 spin_unlock_irqrestore(&priv->lock, flags); 1030 1031 result = ((mcr & CONTROL_DTR) ? TIOCM_DTR : 0) 1032 | ((mcr & CONTROL_RTS) ? TIOCM_RTS : 0) 1033 | ((status & UART_CTS) ? TIOCM_CTS : 0) 1034 | ((status & UART_DSR) ? TIOCM_DSR : 0) 1035 | ((status & UART_RING) ? TIOCM_RI : 0) 1036 | ((status & UART_DCD) ? TIOCM_CD : 0); 1037 1038 dev_dbg(&port->dev, "%s - result = %x\n", __func__, result); 1039 1040 return result; 1041 } 1042 1043 static int pl2303_carrier_raised(struct usb_serial_port *port) 1044 { 1045 struct pl2303_private *priv = usb_get_serial_port_data(port); 1046 1047 if (priv->line_status & UART_DCD) 1048 return 1; 1049 1050 return 0; 1051 } 1052 1053 static void pl2303_set_break(struct usb_serial_port *port, bool enable) 1054 { 1055 struct usb_serial *serial = port->serial; 1056 u16 state; 1057 int result; 1058 1059 if (enable) 1060 state = BREAK_ON; 1061 else 1062 state = BREAK_OFF; 1063 1064 dev_dbg(&port->dev, "%s - turning break %s\n", __func__, 1065 state == BREAK_OFF ? "off" : "on"); 1066 1067 result = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), 1068 BREAK_REQUEST, BREAK_REQUEST_TYPE, state, 1069 0, NULL, 0, 100); 1070 if (result) 1071 dev_err(&port->dev, "error sending break = %d\n", result); 1072 } 1073 1074 static void pl2303_break_ctl(struct tty_struct *tty, int state) 1075 { 1076 struct usb_serial_port *port = tty->driver_data; 1077 1078 pl2303_set_break(port, state); 1079 } 1080 1081 static void pl2303_update_line_status(struct usb_serial_port *port, 1082 unsigned char *data, 1083 unsigned int actual_length) 1084 { 1085 struct usb_serial *serial = port->serial; 1086 struct pl2303_serial_private *spriv = usb_get_serial_data(serial); 1087 struct pl2303_private *priv = usb_get_serial_port_data(port); 1088 struct tty_struct *tty; 1089 unsigned long flags; 1090 unsigned int status_idx = UART_STATE_INDEX; 1091 u8 status; 1092 u8 delta; 1093 1094 if (spriv->quirks & PL2303_QUIRK_UART_STATE_IDX0) 1095 status_idx = 0; 1096 1097 if (actual_length < status_idx + 1) 1098 return; 1099 1100 status = data[status_idx]; 1101 1102 /* Save off the uart status for others to look at */ 1103 spin_lock_irqsave(&priv->lock, flags); 1104 delta = priv->line_status ^ status; 1105 priv->line_status = status; 1106 spin_unlock_irqrestore(&priv->lock, flags); 1107 1108 if (status & UART_BREAK_ERROR) 1109 usb_serial_handle_break(port); 1110 1111 if (delta & UART_STATE_MSR_MASK) { 1112 if (delta & UART_CTS) 1113 port->icount.cts++; 1114 if (delta & UART_DSR) 1115 port->icount.dsr++; 1116 if (delta & UART_RING) 1117 port->icount.rng++; 1118 if (delta & UART_DCD) { 1119 port->icount.dcd++; 1120 tty = tty_port_tty_get(&port->port); 1121 if (tty) { 1122 usb_serial_handle_dcd_change(port, tty, 1123 status & UART_DCD); 1124 tty_kref_put(tty); 1125 } 1126 } 1127 1128 wake_up_interruptible(&port->port.delta_msr_wait); 1129 } 1130 } 1131 1132 static void pl2303_read_int_callback(struct urb *urb) 1133 { 1134 struct usb_serial_port *port = urb->context; 1135 unsigned char *data = urb->transfer_buffer; 1136 unsigned int actual_length = urb->actual_length; 1137 int status = urb->status; 1138 int retval; 1139 1140 switch (status) { 1141 case 0: 1142 /* success */ 1143 break; 1144 case -ECONNRESET: 1145 case -ENOENT: 1146 case -ESHUTDOWN: 1147 /* this urb is terminated, clean up */ 1148 dev_dbg(&port->dev, "%s - urb shutting down with status: %d\n", 1149 __func__, status); 1150 return; 1151 default: 1152 dev_dbg(&port->dev, "%s - nonzero urb status received: %d\n", 1153 __func__, status); 1154 goto exit; 1155 } 1156 1157 usb_serial_debug_data(&port->dev, __func__, 1158 urb->actual_length, urb->transfer_buffer); 1159 1160 pl2303_update_line_status(port, data, actual_length); 1161 1162 exit: 1163 retval = usb_submit_urb(urb, GFP_ATOMIC); 1164 if (retval) { 1165 dev_err(&port->dev, 1166 "%s - usb_submit_urb failed with result %d\n", 1167 __func__, retval); 1168 } 1169 } 1170 1171 static void pl2303_process_read_urb(struct urb *urb) 1172 { 1173 struct usb_serial_port *port = urb->context; 1174 struct pl2303_private *priv = usb_get_serial_port_data(port); 1175 unsigned char *data = urb->transfer_buffer; 1176 char tty_flag = TTY_NORMAL; 1177 unsigned long flags; 1178 u8 line_status; 1179 int i; 1180 1181 /* update line status */ 1182 spin_lock_irqsave(&priv->lock, flags); 1183 line_status = priv->line_status; 1184 priv->line_status &= ~UART_STATE_TRANSIENT_MASK; 1185 spin_unlock_irqrestore(&priv->lock, flags); 1186 1187 if (!urb->actual_length) 1188 return; 1189 1190 /* 1191 * Break takes precedence over parity, which takes precedence over 1192 * framing errors. 1193 */ 1194 if (line_status & UART_BREAK_ERROR) 1195 tty_flag = TTY_BREAK; 1196 else if (line_status & UART_PARITY_ERROR) 1197 tty_flag = TTY_PARITY; 1198 else if (line_status & UART_FRAME_ERROR) 1199 tty_flag = TTY_FRAME; 1200 1201 if (tty_flag != TTY_NORMAL) 1202 dev_dbg(&port->dev, "%s - tty_flag = %d\n", __func__, 1203 tty_flag); 1204 /* overrun is special, not associated with a char */ 1205 if (line_status & UART_OVERRUN_ERROR) 1206 tty_insert_flip_char(&port->port, 0, TTY_OVERRUN); 1207 1208 if (port->sysrq) { 1209 for (i = 0; i < urb->actual_length; ++i) 1210 if (!usb_serial_handle_sysrq_char(port, data[i])) 1211 tty_insert_flip_char(&port->port, data[i], 1212 tty_flag); 1213 } else { 1214 tty_insert_flip_string_fixed_flag(&port->port, data, tty_flag, 1215 urb->actual_length); 1216 } 1217 1218 tty_flip_buffer_push(&port->port); 1219 } 1220 1221 static struct usb_serial_driver pl2303_device = { 1222 .driver = { 1223 .owner = THIS_MODULE, 1224 .name = "pl2303", 1225 }, 1226 .id_table = id_table, 1227 .num_bulk_in = 1, 1228 .num_bulk_out = 1, 1229 .num_interrupt_in = 0, /* see pl2303_calc_num_ports */ 1230 .bulk_in_size = 256, 1231 .bulk_out_size = 256, 1232 .open = pl2303_open, 1233 .close = pl2303_close, 1234 .dtr_rts = pl2303_dtr_rts, 1235 .carrier_raised = pl2303_carrier_raised, 1236 .break_ctl = pl2303_break_ctl, 1237 .set_termios = pl2303_set_termios, 1238 .tiocmget = pl2303_tiocmget, 1239 .tiocmset = pl2303_tiocmset, 1240 .tiocmiwait = usb_serial_generic_tiocmiwait, 1241 .process_read_urb = pl2303_process_read_urb, 1242 .read_int_callback = pl2303_read_int_callback, 1243 .probe = pl2303_probe, 1244 .calc_num_ports = pl2303_calc_num_ports, 1245 .attach = pl2303_startup, 1246 .release = pl2303_release, 1247 .port_probe = pl2303_port_probe, 1248 .port_remove = pl2303_port_remove, 1249 }; 1250 1251 static struct usb_serial_driver * const serial_drivers[] = { 1252 &pl2303_device, NULL 1253 }; 1254 1255 module_usb_serial_driver(serial_drivers, id_table); 1256 1257 MODULE_DESCRIPTION("Prolific PL2303 USB to serial adaptor driver"); 1258 MODULE_LICENSE("GPL v2"); 1259