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_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 }; 123 124 MODULE_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 175 176 static void pl2303_set_break(struct usb_serial_port *port, bool enable); 177 178 enum pl2303_type { 179 TYPE_H, 180 TYPE_HX, 181 TYPE_TA, 182 TYPE_TB, 183 TYPE_HXD, 184 TYPE_HXN, 185 TYPE_COUNT 186 }; 187 188 struct 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 }; 196 197 struct pl2303_serial_private { 198 const struct pl2303_type_data *type; 199 unsigned long quirks; 200 }; 201 202 struct pl2303_private { 203 spinlock_t lock; 204 u8 line_control; 205 u8 line_status; 206 207 u8 line_settings[7]; 208 }; 209 210 static 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 }; 241 242 static 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 } 271 272 static 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 } 297 298 static 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); 320 out_free: 321 kfree(buf); 322 323 return ret; 324 } 325 326 static 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 */ 339 static 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 } 368 369 static 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 } 389 390 static 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 } 401 402 static 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 0x110: 425 switch (bcdDevice) { 426 case 0x300: 427 return TYPE_HX; 428 case 0x400: 429 return TYPE_HXD; 430 default: 431 return TYPE_HX; 432 } 433 break; 434 case 0x200: 435 switch (bcdDevice) { 436 case 0x100: 437 case 0x105: 438 case 0x305: 439 case 0x405: 440 case 0x605: 441 /* 442 * Assume it's an HXN-type if the device doesn't 443 * support the old read request value. 444 */ 445 if (!pl2303_supports_hx_status(serial)) 446 return TYPE_HXN; 447 break; 448 case 0x300: 449 return TYPE_TA; 450 case 0x500: 451 return TYPE_TB; 452 } 453 break; 454 } 455 456 dev_err(&serial->interface->dev, 457 "unknown device type, please report to linux-usb@vger.kernel.org\n"); 458 return -ENODEV; 459 } 460 461 static int pl2303_startup(struct usb_serial *serial) 462 { 463 struct pl2303_serial_private *spriv; 464 enum pl2303_type type; 465 unsigned char *buf; 466 int ret; 467 468 ret = pl2303_detect_type(serial); 469 if (ret < 0) 470 return ret; 471 472 type = ret; 473 dev_dbg(&serial->interface->dev, "device type: %s\n", pl2303_type_data[type].name); 474 475 spriv = kzalloc(sizeof(*spriv), GFP_KERNEL); 476 if (!spriv) 477 return -ENOMEM; 478 479 spriv->type = &pl2303_type_data[type]; 480 spriv->quirks = (unsigned long)usb_get_serial_data(serial); 481 spriv->quirks |= spriv->type->quirks; 482 483 usb_set_serial_data(serial, spriv); 484 485 if (type != TYPE_HXN) { 486 buf = kmalloc(1, GFP_KERNEL); 487 if (!buf) { 488 kfree(spriv); 489 return -ENOMEM; 490 } 491 492 pl2303_vendor_read(serial, 0x8484, buf); 493 pl2303_vendor_write(serial, 0x0404, 0); 494 pl2303_vendor_read(serial, 0x8484, buf); 495 pl2303_vendor_read(serial, 0x8383, buf); 496 pl2303_vendor_read(serial, 0x8484, buf); 497 pl2303_vendor_write(serial, 0x0404, 1); 498 pl2303_vendor_read(serial, 0x8484, buf); 499 pl2303_vendor_read(serial, 0x8383, buf); 500 pl2303_vendor_write(serial, 0, 1); 501 pl2303_vendor_write(serial, 1, 0); 502 if (spriv->quirks & PL2303_QUIRK_LEGACY) 503 pl2303_vendor_write(serial, 2, 0x24); 504 else 505 pl2303_vendor_write(serial, 2, 0x44); 506 507 kfree(buf); 508 } 509 510 return 0; 511 } 512 513 static void pl2303_release(struct usb_serial *serial) 514 { 515 struct pl2303_serial_private *spriv = usb_get_serial_data(serial); 516 517 kfree(spriv); 518 } 519 520 static int pl2303_port_probe(struct usb_serial_port *port) 521 { 522 struct pl2303_private *priv; 523 524 priv = kzalloc(sizeof(*priv), GFP_KERNEL); 525 if (!priv) 526 return -ENOMEM; 527 528 spin_lock_init(&priv->lock); 529 530 usb_set_serial_port_data(port, priv); 531 532 port->port.drain_delay = 256; 533 534 return 0; 535 } 536 537 static void pl2303_port_remove(struct usb_serial_port *port) 538 { 539 struct pl2303_private *priv = usb_get_serial_port_data(port); 540 541 kfree(priv); 542 } 543 544 static int pl2303_set_control_lines(struct usb_serial_port *port, u8 value) 545 { 546 struct usb_device *dev = port->serial->dev; 547 int retval; 548 549 dev_dbg(&port->dev, "%s - %02x\n", __func__, value); 550 551 retval = usb_control_msg(dev, usb_sndctrlpipe(dev, 0), 552 SET_CONTROL_REQUEST, SET_CONTROL_REQUEST_TYPE, 553 value, 0, NULL, 0, 100); 554 if (retval) 555 dev_err(&port->dev, "%s - failed: %d\n", __func__, retval); 556 557 return retval; 558 } 559 560 /* 561 * Returns the nearest supported baud rate that can be set directly without 562 * using divisors. 563 */ 564 static speed_t pl2303_get_supported_baud_rate(speed_t baud) 565 { 566 static const speed_t baud_sup[] = { 567 75, 150, 300, 600, 1200, 1800, 2400, 3600, 4800, 7200, 9600, 568 14400, 19200, 28800, 38400, 57600, 115200, 230400, 460800, 569 614400, 921600, 1228800, 2457600, 3000000, 6000000 570 }; 571 572 unsigned i; 573 574 for (i = 0; i < ARRAY_SIZE(baud_sup); ++i) { 575 if (baud_sup[i] > baud) 576 break; 577 } 578 579 if (i == ARRAY_SIZE(baud_sup)) 580 baud = baud_sup[i - 1]; 581 else if (i > 0 && (baud_sup[i] - baud) > (baud - baud_sup[i - 1])) 582 baud = baud_sup[i - 1]; 583 else 584 baud = baud_sup[i]; 585 586 return baud; 587 } 588 589 /* 590 * NOTE: If unsupported baud rates are set directly, the PL2303 seems to 591 * use 9600 baud. 592 */ 593 static speed_t pl2303_encode_baud_rate_direct(unsigned char buf[4], 594 speed_t baud) 595 { 596 put_unaligned_le32(baud, buf); 597 598 return baud; 599 } 600 601 static speed_t pl2303_encode_baud_rate_divisor(unsigned char buf[4], 602 speed_t baud) 603 { 604 unsigned int baseline, mantissa, exponent; 605 606 /* 607 * Apparently the formula is: 608 * baudrate = 12M * 32 / (mantissa * 4^exponent) 609 * where 610 * mantissa = buf[8:0] 611 * exponent = buf[11:9] 612 */ 613 baseline = 12000000 * 32; 614 mantissa = baseline / baud; 615 if (mantissa == 0) 616 mantissa = 1; /* Avoid dividing by zero if baud > 32*12M. */ 617 exponent = 0; 618 while (mantissa >= 512) { 619 if (exponent < 7) { 620 mantissa >>= 2; /* divide by 4 */ 621 exponent++; 622 } else { 623 /* Exponent is maxed. Trim mantissa and leave. */ 624 mantissa = 511; 625 break; 626 } 627 } 628 629 buf[3] = 0x80; 630 buf[2] = 0; 631 buf[1] = exponent << 1 | mantissa >> 8; 632 buf[0] = mantissa & 0xff; 633 634 /* Calculate and return the exact baud rate. */ 635 baud = (baseline / mantissa) >> (exponent << 1); 636 637 return baud; 638 } 639 640 static speed_t pl2303_encode_baud_rate_divisor_alt(unsigned char buf[4], 641 speed_t baud) 642 { 643 unsigned int baseline, mantissa, exponent; 644 645 /* 646 * Apparently, for the TA version the formula is: 647 * baudrate = 12M * 32 / (mantissa * 2^exponent) 648 * where 649 * mantissa = buf[10:0] 650 * exponent = buf[15:13 16] 651 */ 652 baseline = 12000000 * 32; 653 mantissa = baseline / baud; 654 if (mantissa == 0) 655 mantissa = 1; /* Avoid dividing by zero if baud > 32*12M. */ 656 exponent = 0; 657 while (mantissa >= 2048) { 658 if (exponent < 15) { 659 mantissa >>= 1; /* divide by 2 */ 660 exponent++; 661 } else { 662 /* Exponent is maxed. Trim mantissa and leave. */ 663 mantissa = 2047; 664 break; 665 } 666 } 667 668 buf[3] = 0x80; 669 buf[2] = exponent & 0x01; 670 buf[1] = (exponent & ~0x01) << 4 | mantissa >> 8; 671 buf[0] = mantissa & 0xff; 672 673 /* Calculate and return the exact baud rate. */ 674 baud = (baseline / mantissa) >> exponent; 675 676 return baud; 677 } 678 679 static void pl2303_encode_baud_rate(struct tty_struct *tty, 680 struct usb_serial_port *port, 681 u8 buf[4]) 682 { 683 struct usb_serial *serial = port->serial; 684 struct pl2303_serial_private *spriv = usb_get_serial_data(serial); 685 speed_t baud_sup; 686 speed_t baud; 687 688 baud = tty_get_baud_rate(tty); 689 dev_dbg(&port->dev, "baud requested = %u\n", baud); 690 if (!baud) 691 return; 692 693 if (spriv->type->max_baud_rate) 694 baud = min_t(speed_t, baud, spriv->type->max_baud_rate); 695 /* 696 * Use direct method for supported baud rates, otherwise use divisors. 697 * Newer chip types do not support divisor encoding. 698 */ 699 if (spriv->type->no_divisors) 700 baud_sup = baud; 701 else 702 baud_sup = pl2303_get_supported_baud_rate(baud); 703 704 if (baud == baud_sup) 705 baud = pl2303_encode_baud_rate_direct(buf, baud); 706 else if (spriv->type->alt_divisors) 707 baud = pl2303_encode_baud_rate_divisor_alt(buf, baud); 708 else 709 baud = pl2303_encode_baud_rate_divisor(buf, baud); 710 711 /* Save resulting baud rate */ 712 tty_encode_baud_rate(tty, baud, baud); 713 dev_dbg(&port->dev, "baud set = %u\n", baud); 714 } 715 716 static int pl2303_get_line_request(struct usb_serial_port *port, 717 unsigned char buf[7]) 718 { 719 struct usb_device *udev = port->serial->dev; 720 int ret; 721 722 ret = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0), 723 GET_LINE_REQUEST, GET_LINE_REQUEST_TYPE, 724 0, 0, buf, 7, 100); 725 if (ret != 7) { 726 dev_err(&port->dev, "%s - failed: %d\n", __func__, ret); 727 728 if (ret >= 0) 729 ret = -EIO; 730 731 return ret; 732 } 733 734 dev_dbg(&port->dev, "%s - %7ph\n", __func__, buf); 735 736 return 0; 737 } 738 739 static int pl2303_set_line_request(struct usb_serial_port *port, 740 unsigned char buf[7]) 741 { 742 struct usb_device *udev = port->serial->dev; 743 int ret; 744 745 ret = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), 746 SET_LINE_REQUEST, SET_LINE_REQUEST_TYPE, 747 0, 0, buf, 7, 100); 748 if (ret < 0) { 749 dev_err(&port->dev, "%s - failed: %d\n", __func__, ret); 750 return ret; 751 } 752 753 dev_dbg(&port->dev, "%s - %7ph\n", __func__, buf); 754 755 return 0; 756 } 757 758 static bool pl2303_termios_change(const struct ktermios *a, const struct ktermios *b) 759 { 760 bool ixon_change; 761 762 ixon_change = ((a->c_iflag ^ b->c_iflag) & (IXON | IXANY)) || 763 a->c_cc[VSTART] != b->c_cc[VSTART] || 764 a->c_cc[VSTOP] != b->c_cc[VSTOP]; 765 766 return tty_termios_hw_change(a, b) || ixon_change; 767 } 768 769 static bool pl2303_enable_xonxoff(struct tty_struct *tty, const struct pl2303_type_data *type) 770 { 771 if (!I_IXON(tty) || I_IXANY(tty)) 772 return false; 773 774 if (START_CHAR(tty) != 0x11 || STOP_CHAR(tty) != 0x13) 775 return false; 776 777 if (type->no_autoxonxoff) 778 return false; 779 780 return true; 781 } 782 783 static void pl2303_set_termios(struct tty_struct *tty, 784 struct usb_serial_port *port, struct ktermios *old_termios) 785 { 786 struct usb_serial *serial = port->serial; 787 struct pl2303_serial_private *spriv = usb_get_serial_data(serial); 788 struct pl2303_private *priv = usb_get_serial_port_data(port); 789 unsigned long flags; 790 unsigned char *buf; 791 int ret; 792 u8 control; 793 794 if (old_termios && !pl2303_termios_change(&tty->termios, old_termios)) 795 return; 796 797 buf = kzalloc(7, GFP_KERNEL); 798 if (!buf) { 799 /* Report back no change occurred */ 800 if (old_termios) 801 tty->termios = *old_termios; 802 return; 803 } 804 805 pl2303_get_line_request(port, buf); 806 807 buf[6] = tty_get_char_size(tty->termios.c_cflag); 808 dev_dbg(&port->dev, "data bits = %d\n", buf[6]); 809 810 /* For reference buf[0]:buf[3] baud rate value */ 811 pl2303_encode_baud_rate(tty, port, &buf[0]); 812 813 /* For reference buf[4]=0 is 1 stop bits */ 814 /* For reference buf[4]=1 is 1.5 stop bits */ 815 /* For reference buf[4]=2 is 2 stop bits */ 816 if (C_CSTOPB(tty)) { 817 /* 818 * NOTE: Comply with "real" UARTs / RS232: 819 * use 1.5 instead of 2 stop bits with 5 data bits 820 */ 821 if (C_CSIZE(tty) == CS5) { 822 buf[4] = 1; 823 dev_dbg(&port->dev, "stop bits = 1.5\n"); 824 } else { 825 buf[4] = 2; 826 dev_dbg(&port->dev, "stop bits = 2\n"); 827 } 828 } else { 829 buf[4] = 0; 830 dev_dbg(&port->dev, "stop bits = 1\n"); 831 } 832 833 if (C_PARENB(tty)) { 834 /* For reference buf[5]=0 is none parity */ 835 /* For reference buf[5]=1 is odd parity */ 836 /* For reference buf[5]=2 is even parity */ 837 /* For reference buf[5]=3 is mark parity */ 838 /* For reference buf[5]=4 is space parity */ 839 if (C_PARODD(tty)) { 840 if (C_CMSPAR(tty)) { 841 buf[5] = 3; 842 dev_dbg(&port->dev, "parity = mark\n"); 843 } else { 844 buf[5] = 1; 845 dev_dbg(&port->dev, "parity = odd\n"); 846 } 847 } else { 848 if (C_CMSPAR(tty)) { 849 buf[5] = 4; 850 dev_dbg(&port->dev, "parity = space\n"); 851 } else { 852 buf[5] = 2; 853 dev_dbg(&port->dev, "parity = even\n"); 854 } 855 } 856 } else { 857 buf[5] = 0; 858 dev_dbg(&port->dev, "parity = none\n"); 859 } 860 861 /* 862 * Some PL2303 are known to lose bytes if you change serial settings 863 * even to the same values as before. Thus we actually need to filter 864 * in this specific case. 865 * 866 * Note that the tty_termios_hw_change check above is not sufficient 867 * as a previously requested baud rate may differ from the one 868 * actually used (and stored in old_termios). 869 * 870 * NOTE: No additional locking needed for line_settings as it is 871 * only used in set_termios, which is serialised against itself. 872 */ 873 if (!old_termios || memcmp(buf, priv->line_settings, 7)) { 874 ret = pl2303_set_line_request(port, buf); 875 if (!ret) 876 memcpy(priv->line_settings, buf, 7); 877 } 878 879 /* change control lines if we are switching to or from B0 */ 880 spin_lock_irqsave(&priv->lock, flags); 881 control = priv->line_control; 882 if (C_BAUD(tty) == B0) 883 priv->line_control &= ~(CONTROL_DTR | CONTROL_RTS); 884 else if (old_termios && (old_termios->c_cflag & CBAUD) == B0) 885 priv->line_control |= (CONTROL_DTR | CONTROL_RTS); 886 if (control != priv->line_control) { 887 control = priv->line_control; 888 spin_unlock_irqrestore(&priv->lock, flags); 889 pl2303_set_control_lines(port, control); 890 } else { 891 spin_unlock_irqrestore(&priv->lock, flags); 892 } 893 894 if (C_CRTSCTS(tty)) { 895 if (spriv->quirks & PL2303_QUIRK_LEGACY) { 896 pl2303_update_reg(serial, 0, PL2303_FLOWCTRL_MASK, 0x40); 897 } else if (spriv->type == &pl2303_type_data[TYPE_HXN]) { 898 pl2303_update_reg(serial, PL2303_HXN_FLOWCTRL_REG, 899 PL2303_HXN_FLOWCTRL_MASK, 900 PL2303_HXN_FLOWCTRL_RTS_CTS); 901 } else { 902 pl2303_update_reg(serial, 0, PL2303_FLOWCTRL_MASK, 0x60); 903 } 904 } else if (pl2303_enable_xonxoff(tty, spriv->type)) { 905 if (spriv->type == &pl2303_type_data[TYPE_HXN]) { 906 pl2303_update_reg(serial, PL2303_HXN_FLOWCTRL_REG, 907 PL2303_HXN_FLOWCTRL_MASK, 908 PL2303_HXN_FLOWCTRL_XON_XOFF); 909 } else { 910 pl2303_update_reg(serial, 0, PL2303_FLOWCTRL_MASK, 0xc0); 911 } 912 } else { 913 if (spriv->type == &pl2303_type_data[TYPE_HXN]) { 914 pl2303_update_reg(serial, PL2303_HXN_FLOWCTRL_REG, 915 PL2303_HXN_FLOWCTRL_MASK, 916 PL2303_HXN_FLOWCTRL_NONE); 917 } else { 918 pl2303_update_reg(serial, 0, PL2303_FLOWCTRL_MASK, 0); 919 } 920 } 921 922 kfree(buf); 923 } 924 925 static void pl2303_dtr_rts(struct usb_serial_port *port, int on) 926 { 927 struct pl2303_private *priv = usb_get_serial_port_data(port); 928 unsigned long flags; 929 u8 control; 930 931 spin_lock_irqsave(&priv->lock, flags); 932 if (on) 933 priv->line_control |= (CONTROL_DTR | CONTROL_RTS); 934 else 935 priv->line_control &= ~(CONTROL_DTR | CONTROL_RTS); 936 control = priv->line_control; 937 spin_unlock_irqrestore(&priv->lock, flags); 938 939 pl2303_set_control_lines(port, control); 940 } 941 942 static void pl2303_close(struct usb_serial_port *port) 943 { 944 usb_serial_generic_close(port); 945 usb_kill_urb(port->interrupt_in_urb); 946 pl2303_set_break(port, false); 947 } 948 949 static int pl2303_open(struct tty_struct *tty, struct usb_serial_port *port) 950 { 951 struct usb_serial *serial = port->serial; 952 struct pl2303_serial_private *spriv = usb_get_serial_data(serial); 953 int result; 954 955 if (spriv->quirks & PL2303_QUIRK_LEGACY) { 956 usb_clear_halt(serial->dev, port->write_urb->pipe); 957 usb_clear_halt(serial->dev, port->read_urb->pipe); 958 } else { 959 /* reset upstream data pipes */ 960 if (spriv->type == &pl2303_type_data[TYPE_HXN]) { 961 pl2303_vendor_write(serial, PL2303_HXN_RESET_REG, 962 PL2303_HXN_RESET_UPSTREAM_PIPE | 963 PL2303_HXN_RESET_DOWNSTREAM_PIPE); 964 } else { 965 pl2303_vendor_write(serial, 8, 0); 966 pl2303_vendor_write(serial, 9, 0); 967 } 968 } 969 970 /* Setup termios */ 971 if (tty) 972 pl2303_set_termios(tty, port, NULL); 973 974 result = usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL); 975 if (result) { 976 dev_err(&port->dev, "failed to submit interrupt urb: %d\n", 977 result); 978 return result; 979 } 980 981 result = usb_serial_generic_open(tty, port); 982 if (result) { 983 usb_kill_urb(port->interrupt_in_urb); 984 return result; 985 } 986 987 return 0; 988 } 989 990 static int pl2303_tiocmset(struct tty_struct *tty, 991 unsigned int set, unsigned int clear) 992 { 993 struct usb_serial_port *port = tty->driver_data; 994 struct pl2303_private *priv = usb_get_serial_port_data(port); 995 unsigned long flags; 996 u8 control; 997 int ret; 998 999 spin_lock_irqsave(&priv->lock, flags); 1000 if (set & TIOCM_RTS) 1001 priv->line_control |= CONTROL_RTS; 1002 if (set & TIOCM_DTR) 1003 priv->line_control |= CONTROL_DTR; 1004 if (clear & TIOCM_RTS) 1005 priv->line_control &= ~CONTROL_RTS; 1006 if (clear & TIOCM_DTR) 1007 priv->line_control &= ~CONTROL_DTR; 1008 control = priv->line_control; 1009 spin_unlock_irqrestore(&priv->lock, flags); 1010 1011 ret = pl2303_set_control_lines(port, control); 1012 if (ret) 1013 return usb_translate_errors(ret); 1014 1015 return 0; 1016 } 1017 1018 static int pl2303_tiocmget(struct tty_struct *tty) 1019 { 1020 struct usb_serial_port *port = tty->driver_data; 1021 struct pl2303_private *priv = usb_get_serial_port_data(port); 1022 unsigned long flags; 1023 unsigned int mcr; 1024 unsigned int status; 1025 unsigned int result; 1026 1027 spin_lock_irqsave(&priv->lock, flags); 1028 mcr = priv->line_control; 1029 status = priv->line_status; 1030 spin_unlock_irqrestore(&priv->lock, flags); 1031 1032 result = ((mcr & CONTROL_DTR) ? TIOCM_DTR : 0) 1033 | ((mcr & CONTROL_RTS) ? TIOCM_RTS : 0) 1034 | ((status & UART_CTS) ? TIOCM_CTS : 0) 1035 | ((status & UART_DSR) ? TIOCM_DSR : 0) 1036 | ((status & UART_RING) ? TIOCM_RI : 0) 1037 | ((status & UART_DCD) ? TIOCM_CD : 0); 1038 1039 dev_dbg(&port->dev, "%s - result = %x\n", __func__, result); 1040 1041 return result; 1042 } 1043 1044 static int pl2303_carrier_raised(struct usb_serial_port *port) 1045 { 1046 struct pl2303_private *priv = usb_get_serial_port_data(port); 1047 1048 if (priv->line_status & UART_DCD) 1049 return 1; 1050 1051 return 0; 1052 } 1053 1054 static void pl2303_set_break(struct usb_serial_port *port, bool enable) 1055 { 1056 struct usb_serial *serial = port->serial; 1057 u16 state; 1058 int result; 1059 1060 if (enable) 1061 state = BREAK_ON; 1062 else 1063 state = BREAK_OFF; 1064 1065 dev_dbg(&port->dev, "%s - turning break %s\n", __func__, 1066 state == BREAK_OFF ? "off" : "on"); 1067 1068 result = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), 1069 BREAK_REQUEST, BREAK_REQUEST_TYPE, state, 1070 0, NULL, 0, 100); 1071 if (result) 1072 dev_err(&port->dev, "error sending break = %d\n", result); 1073 } 1074 1075 static void pl2303_break_ctl(struct tty_struct *tty, int state) 1076 { 1077 struct usb_serial_port *port = tty->driver_data; 1078 1079 pl2303_set_break(port, state); 1080 } 1081 1082 static void pl2303_update_line_status(struct usb_serial_port *port, 1083 unsigned char *data, 1084 unsigned int actual_length) 1085 { 1086 struct usb_serial *serial = port->serial; 1087 struct pl2303_serial_private *spriv = usb_get_serial_data(serial); 1088 struct pl2303_private *priv = usb_get_serial_port_data(port); 1089 struct tty_struct *tty; 1090 unsigned long flags; 1091 unsigned int status_idx = UART_STATE_INDEX; 1092 u8 status; 1093 u8 delta; 1094 1095 if (spriv->quirks & PL2303_QUIRK_UART_STATE_IDX0) 1096 status_idx = 0; 1097 1098 if (actual_length < status_idx + 1) 1099 return; 1100 1101 status = data[status_idx]; 1102 1103 /* Save off the uart status for others to look at */ 1104 spin_lock_irqsave(&priv->lock, flags); 1105 delta = priv->line_status ^ status; 1106 priv->line_status = status; 1107 spin_unlock_irqrestore(&priv->lock, flags); 1108 1109 if (status & UART_BREAK_ERROR) 1110 usb_serial_handle_break(port); 1111 1112 if (delta & UART_STATE_MSR_MASK) { 1113 if (delta & UART_CTS) 1114 port->icount.cts++; 1115 if (delta & UART_DSR) 1116 port->icount.dsr++; 1117 if (delta & UART_RING) 1118 port->icount.rng++; 1119 if (delta & UART_DCD) { 1120 port->icount.dcd++; 1121 tty = tty_port_tty_get(&port->port); 1122 if (tty) { 1123 usb_serial_handle_dcd_change(port, tty, 1124 status & UART_DCD); 1125 tty_kref_put(tty); 1126 } 1127 } 1128 1129 wake_up_interruptible(&port->port.delta_msr_wait); 1130 } 1131 } 1132 1133 static void pl2303_read_int_callback(struct urb *urb) 1134 { 1135 struct usb_serial_port *port = urb->context; 1136 unsigned char *data = urb->transfer_buffer; 1137 unsigned int actual_length = urb->actual_length; 1138 int status = urb->status; 1139 int retval; 1140 1141 switch (status) { 1142 case 0: 1143 /* success */ 1144 break; 1145 case -ECONNRESET: 1146 case -ENOENT: 1147 case -ESHUTDOWN: 1148 /* this urb is terminated, clean up */ 1149 dev_dbg(&port->dev, "%s - urb shutting down with status: %d\n", 1150 __func__, status); 1151 return; 1152 default: 1153 dev_dbg(&port->dev, "%s - nonzero urb status received: %d\n", 1154 __func__, status); 1155 goto exit; 1156 } 1157 1158 usb_serial_debug_data(&port->dev, __func__, 1159 urb->actual_length, urb->transfer_buffer); 1160 1161 pl2303_update_line_status(port, data, actual_length); 1162 1163 exit: 1164 retval = usb_submit_urb(urb, GFP_ATOMIC); 1165 if (retval) { 1166 dev_err(&port->dev, 1167 "%s - usb_submit_urb failed with result %d\n", 1168 __func__, retval); 1169 } 1170 } 1171 1172 static void pl2303_process_read_urb(struct urb *urb) 1173 { 1174 struct usb_serial_port *port = urb->context; 1175 struct pl2303_private *priv = usb_get_serial_port_data(port); 1176 unsigned char *data = urb->transfer_buffer; 1177 char tty_flag = TTY_NORMAL; 1178 unsigned long flags; 1179 u8 line_status; 1180 int i; 1181 1182 /* update line status */ 1183 spin_lock_irqsave(&priv->lock, flags); 1184 line_status = priv->line_status; 1185 priv->line_status &= ~UART_STATE_TRANSIENT_MASK; 1186 spin_unlock_irqrestore(&priv->lock, flags); 1187 1188 if (!urb->actual_length) 1189 return; 1190 1191 /* 1192 * Break takes precedence over parity, which takes precedence over 1193 * framing errors. 1194 */ 1195 if (line_status & UART_BREAK_ERROR) 1196 tty_flag = TTY_BREAK; 1197 else if (line_status & UART_PARITY_ERROR) 1198 tty_flag = TTY_PARITY; 1199 else if (line_status & UART_FRAME_ERROR) 1200 tty_flag = TTY_FRAME; 1201 1202 if (tty_flag != TTY_NORMAL) 1203 dev_dbg(&port->dev, "%s - tty_flag = %d\n", __func__, 1204 tty_flag); 1205 /* overrun is special, not associated with a char */ 1206 if (line_status & UART_OVERRUN_ERROR) 1207 tty_insert_flip_char(&port->port, 0, TTY_OVERRUN); 1208 1209 if (port->sysrq) { 1210 for (i = 0; i < urb->actual_length; ++i) 1211 if (!usb_serial_handle_sysrq_char(port, data[i])) 1212 tty_insert_flip_char(&port->port, data[i], 1213 tty_flag); 1214 } else { 1215 tty_insert_flip_string_fixed_flag(&port->port, data, tty_flag, 1216 urb->actual_length); 1217 } 1218 1219 tty_flip_buffer_push(&port->port); 1220 } 1221 1222 static struct usb_serial_driver pl2303_device = { 1223 .driver = { 1224 .owner = THIS_MODULE, 1225 .name = "pl2303", 1226 }, 1227 .id_table = id_table, 1228 .num_bulk_in = 1, 1229 .num_bulk_out = 1, 1230 .num_interrupt_in = 0, /* see pl2303_calc_num_ports */ 1231 .bulk_in_size = 256, 1232 .bulk_out_size = 256, 1233 .open = pl2303_open, 1234 .close = pl2303_close, 1235 .dtr_rts = pl2303_dtr_rts, 1236 .carrier_raised = pl2303_carrier_raised, 1237 .break_ctl = pl2303_break_ctl, 1238 .set_termios = pl2303_set_termios, 1239 .tiocmget = pl2303_tiocmget, 1240 .tiocmset = pl2303_tiocmset, 1241 .tiocmiwait = usb_serial_generic_tiocmiwait, 1242 .process_read_urb = pl2303_process_read_urb, 1243 .read_int_callback = pl2303_read_int_callback, 1244 .probe = pl2303_probe, 1245 .calc_num_ports = pl2303_calc_num_ports, 1246 .attach = pl2303_startup, 1247 .release = pl2303_release, 1248 .port_probe = pl2303_port_probe, 1249 .port_remove = pl2303_port_remove, 1250 }; 1251 1252 static struct usb_serial_driver * const serial_drivers[] = { 1253 &pl2303_device, NULL 1254 }; 1255 1256 module_usb_serial_driver(serial_drivers, id_table); 1257 1258 MODULE_DESCRIPTION("Prolific PL2303 USB to serial adaptor driver"); 1259 MODULE_LICENSE("GPL v2"); 1260