1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * Prolific PL2303 USB to serial adaptor driver 4 * 5 * Copyright (C) 2001-2007 Greg Kroah-Hartman (greg@kroah.com) 6 * Copyright (C) 2003 IBM Corp. 7 * 8 * Original driver for 2.2.x by anonymous 9 * 10 * See Documentation/usb/usb-serial.rst for more information on using this 11 * driver 12 */ 13 14 #include <linux/kernel.h> 15 #include <linux/errno.h> 16 #include <linux/slab.h> 17 #include <linux/tty.h> 18 #include <linux/tty_driver.h> 19 #include <linux/tty_flip.h> 20 #include <linux/serial.h> 21 #include <linux/module.h> 22 #include <linux/moduleparam.h> 23 #include <linux/spinlock.h> 24 #include <linux/uaccess.h> 25 #include <linux/usb.h> 26 #include <linux/usb/serial.h> 27 #include <asm/unaligned.h> 28 #include "pl2303.h" 29 30 31 #define PL2303_QUIRK_UART_STATE_IDX0 BIT(0) 32 #define PL2303_QUIRK_LEGACY BIT(1) 33 #define PL2303_QUIRK_ENDPOINT_HACK BIT(2) 34 35 static const struct usb_device_id id_table[] = { 36 { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID), 37 .driver_info = PL2303_QUIRK_ENDPOINT_HACK }, 38 { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_RSAQ2) }, 39 { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_DCU11) }, 40 { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_RSAQ3) }, 41 { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_CHILITAG) }, 42 { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_PHAROS) }, 43 { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_ALDIGA) }, 44 { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_MMX) }, 45 { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_GPRS) }, 46 { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_HCR331) }, 47 { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_MOTOROLA) }, 48 { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_ZTEK) }, 49 { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_TB) }, 50 { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_GC) }, 51 { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_GB) }, 52 { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_GT) }, 53 { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_GL) }, 54 { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_GE) }, 55 { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_GS) }, 56 { USB_DEVICE(IODATA_VENDOR_ID, IODATA_PRODUCT_ID) }, 57 { USB_DEVICE(IODATA_VENDOR_ID, IODATA_PRODUCT_ID_RSAQ5) }, 58 { USB_DEVICE(ATEN_VENDOR_ID, ATEN_PRODUCT_ID), 59 .driver_info = PL2303_QUIRK_ENDPOINT_HACK }, 60 { USB_DEVICE(ATEN_VENDOR_ID, ATEN_PRODUCT_UC485), 61 .driver_info = PL2303_QUIRK_ENDPOINT_HACK }, 62 { USB_DEVICE(ATEN_VENDOR_ID, ATEN_PRODUCT_UC232B), 63 .driver_info = PL2303_QUIRK_ENDPOINT_HACK }, 64 { USB_DEVICE(ATEN_VENDOR_ID, ATEN_PRODUCT_ID2) }, 65 { USB_DEVICE(ATEN_VENDOR_ID2, ATEN_PRODUCT_ID) }, 66 { USB_DEVICE(ELCOM_VENDOR_ID, ELCOM_PRODUCT_ID) }, 67 { USB_DEVICE(ELCOM_VENDOR_ID, ELCOM_PRODUCT_ID_UCSGT) }, 68 { USB_DEVICE(ITEGNO_VENDOR_ID, ITEGNO_PRODUCT_ID) }, 69 { USB_DEVICE(ITEGNO_VENDOR_ID, ITEGNO_PRODUCT_ID_2080) }, 70 { USB_DEVICE(MA620_VENDOR_ID, MA620_PRODUCT_ID) }, 71 { USB_DEVICE(RATOC_VENDOR_ID, RATOC_PRODUCT_ID) }, 72 { USB_DEVICE(TRIPP_VENDOR_ID, TRIPP_PRODUCT_ID) }, 73 { USB_DEVICE(RADIOSHACK_VENDOR_ID, RADIOSHACK_PRODUCT_ID) }, 74 { USB_DEVICE(DCU10_VENDOR_ID, DCU10_PRODUCT_ID) }, 75 { USB_DEVICE(SITECOM_VENDOR_ID, SITECOM_PRODUCT_ID) }, 76 { USB_DEVICE(ALCATEL_VENDOR_ID, ALCATEL_PRODUCT_ID) }, 77 { USB_DEVICE(SIEMENS_VENDOR_ID, SIEMENS_PRODUCT_ID_SX1), 78 .driver_info = PL2303_QUIRK_UART_STATE_IDX0 }, 79 { USB_DEVICE(SIEMENS_VENDOR_ID, SIEMENS_PRODUCT_ID_X65), 80 .driver_info = PL2303_QUIRK_UART_STATE_IDX0 }, 81 { USB_DEVICE(SIEMENS_VENDOR_ID, SIEMENS_PRODUCT_ID_X75), 82 .driver_info = PL2303_QUIRK_UART_STATE_IDX0 }, 83 { USB_DEVICE(SIEMENS_VENDOR_ID, SIEMENS_PRODUCT_ID_EF81), 84 .driver_info = PL2303_QUIRK_ENDPOINT_HACK }, 85 { USB_DEVICE(BENQ_VENDOR_ID, BENQ_PRODUCT_ID_S81) }, /* Benq/Siemens S81 */ 86 { USB_DEVICE(SYNTECH_VENDOR_ID, SYNTECH_PRODUCT_ID) }, 87 { USB_DEVICE(NOKIA_CA42_VENDOR_ID, NOKIA_CA42_PRODUCT_ID) }, 88 { USB_DEVICE(CA_42_CA42_VENDOR_ID, CA_42_CA42_PRODUCT_ID) }, 89 { USB_DEVICE(SAGEM_VENDOR_ID, SAGEM_PRODUCT_ID) }, 90 { USB_DEVICE(LEADTEK_VENDOR_ID, LEADTEK_9531_PRODUCT_ID) }, 91 { USB_DEVICE(SPEEDDRAGON_VENDOR_ID, SPEEDDRAGON_PRODUCT_ID) }, 92 { USB_DEVICE(DATAPILOT_U2_VENDOR_ID, DATAPILOT_U2_PRODUCT_ID) }, 93 { USB_DEVICE(BELKIN_VENDOR_ID, BELKIN_PRODUCT_ID) }, 94 { USB_DEVICE(ALCOR_VENDOR_ID, ALCOR_PRODUCT_ID), 95 .driver_info = PL2303_QUIRK_ENDPOINT_HACK }, 96 { USB_DEVICE(WS002IN_VENDOR_ID, WS002IN_PRODUCT_ID) }, 97 { USB_DEVICE(COREGA_VENDOR_ID, COREGA_PRODUCT_ID) }, 98 { USB_DEVICE(YCCABLE_VENDOR_ID, YCCABLE_PRODUCT_ID) }, 99 { USB_DEVICE(SUPERIAL_VENDOR_ID, SUPERIAL_PRODUCT_ID) }, 100 { USB_DEVICE(HP_VENDOR_ID, HP_LD220_PRODUCT_ID) }, 101 { USB_DEVICE(HP_VENDOR_ID, HP_LD220TA_PRODUCT_ID) }, 102 { USB_DEVICE(HP_VENDOR_ID, HP_LD381_PRODUCT_ID) }, 103 { USB_DEVICE(HP_VENDOR_ID, HP_LD381GC_PRODUCT_ID) }, 104 { USB_DEVICE(HP_VENDOR_ID, HP_LD960_PRODUCT_ID) }, 105 { USB_DEVICE(HP_VENDOR_ID, HP_LD960TA_PRODUCT_ID) }, 106 { USB_DEVICE(HP_VENDOR_ID, HP_LCM220_PRODUCT_ID) }, 107 { USB_DEVICE(HP_VENDOR_ID, HP_LCM960_PRODUCT_ID) }, 108 { USB_DEVICE(HP_VENDOR_ID, HP_LM920_PRODUCT_ID) }, 109 { USB_DEVICE(HP_VENDOR_ID, HP_LM940_PRODUCT_ID) }, 110 { USB_DEVICE(HP_VENDOR_ID, HP_TD620_PRODUCT_ID) }, 111 { USB_DEVICE(CRESSI_VENDOR_ID, CRESSI_EDY_PRODUCT_ID) }, 112 { USB_DEVICE(ZEAGLE_VENDOR_ID, ZEAGLE_N2ITION3_PRODUCT_ID) }, 113 { USB_DEVICE(SONY_VENDOR_ID, SONY_QN3USB_PRODUCT_ID) }, 114 { USB_DEVICE(SANWA_VENDOR_ID, SANWA_PRODUCT_ID) }, 115 { USB_DEVICE(ADLINK_VENDOR_ID, ADLINK_ND6530_PRODUCT_ID) }, 116 { USB_DEVICE(ADLINK_VENDOR_ID, ADLINK_ND6530GC_PRODUCT_ID) }, 117 { USB_DEVICE(SMART_VENDOR_ID, SMART_PRODUCT_ID) }, 118 { USB_DEVICE(AT_VENDOR_ID, AT_VTKIT3_PRODUCT_ID) }, 119 { } /* Terminating entry */ 120 }; 121 122 MODULE_DEVICE_TABLE(usb, id_table); 123 124 #define SET_LINE_REQUEST_TYPE 0x21 125 #define SET_LINE_REQUEST 0x20 126 127 #define SET_CONTROL_REQUEST_TYPE 0x21 128 #define SET_CONTROL_REQUEST 0x22 129 #define CONTROL_DTR 0x01 130 #define CONTROL_RTS 0x02 131 132 #define BREAK_REQUEST_TYPE 0x21 133 #define BREAK_REQUEST 0x23 134 #define BREAK_ON 0xffff 135 #define BREAK_OFF 0x0000 136 137 #define GET_LINE_REQUEST_TYPE 0xa1 138 #define GET_LINE_REQUEST 0x21 139 140 #define VENDOR_WRITE_REQUEST_TYPE 0x40 141 #define VENDOR_WRITE_REQUEST 0x01 142 #define VENDOR_WRITE_NREQUEST 0x80 143 144 #define VENDOR_READ_REQUEST_TYPE 0xc0 145 #define VENDOR_READ_REQUEST 0x01 146 #define VENDOR_READ_NREQUEST 0x81 147 148 #define UART_STATE_INDEX 8 149 #define UART_STATE_MSR_MASK 0x8b 150 #define UART_STATE_TRANSIENT_MASK 0x74 151 #define UART_DCD 0x01 152 #define UART_DSR 0x02 153 #define UART_BREAK_ERROR 0x04 154 #define UART_RING 0x08 155 #define UART_FRAME_ERROR 0x10 156 #define UART_PARITY_ERROR 0x20 157 #define UART_OVERRUN_ERROR 0x40 158 #define UART_CTS 0x80 159 160 #define PL2303_FLOWCTRL_MASK 0xf0 161 162 #define PL2303_READ_TYPE_HX_STATUS 0x8080 163 164 #define PL2303_HXN_RESET_REG 0x07 165 #define PL2303_HXN_RESET_UPSTREAM_PIPE 0x02 166 #define PL2303_HXN_RESET_DOWNSTREAM_PIPE 0x01 167 168 #define PL2303_HXN_FLOWCTRL_REG 0x0a 169 #define PL2303_HXN_FLOWCTRL_MASK 0x1c 170 #define PL2303_HXN_FLOWCTRL_NONE 0x1c 171 #define PL2303_HXN_FLOWCTRL_RTS_CTS 0x18 172 #define PL2303_HXN_FLOWCTRL_XON_XOFF 0x0c 173 174 static void pl2303_set_break(struct usb_serial_port *port, bool enable); 175 176 enum pl2303_type { 177 TYPE_H, 178 TYPE_HX, 179 TYPE_TA, 180 TYPE_TB, 181 TYPE_HXD, 182 TYPE_HXN, 183 TYPE_COUNT 184 }; 185 186 struct pl2303_type_data { 187 const char *name; 188 speed_t max_baud_rate; 189 unsigned long quirks; 190 unsigned int no_autoxonxoff:1; 191 unsigned int no_divisors:1; 192 unsigned int alt_divisors:1; 193 }; 194 195 struct pl2303_serial_private { 196 const struct pl2303_type_data *type; 197 unsigned long quirks; 198 }; 199 200 struct pl2303_private { 201 spinlock_t lock; 202 u8 line_control; 203 u8 line_status; 204 205 u8 line_settings[7]; 206 }; 207 208 static const struct pl2303_type_data pl2303_type_data[TYPE_COUNT] = { 209 [TYPE_H] = { 210 .name = "H", 211 .max_baud_rate = 1228800, 212 .quirks = PL2303_QUIRK_LEGACY, 213 .no_autoxonxoff = true, 214 }, 215 [TYPE_HX] = { 216 .name = "HX", 217 .max_baud_rate = 6000000, 218 }, 219 [TYPE_TA] = { 220 .name = "TA", 221 .max_baud_rate = 6000000, 222 .alt_divisors = true, 223 }, 224 [TYPE_TB] = { 225 .name = "TB", 226 .max_baud_rate = 12000000, 227 .alt_divisors = true, 228 }, 229 [TYPE_HXD] = { 230 .name = "HXD", 231 .max_baud_rate = 12000000, 232 }, 233 [TYPE_HXN] = { 234 .name = "G", 235 .max_baud_rate = 12000000, 236 .no_divisors = true, 237 }, 238 }; 239 240 static int pl2303_vendor_read(struct usb_serial *serial, u16 value, 241 unsigned char buf[1]) 242 { 243 struct pl2303_serial_private *spriv = usb_get_serial_data(serial); 244 struct device *dev = &serial->interface->dev; 245 u8 request; 246 int res; 247 248 if (spriv->type == &pl2303_type_data[TYPE_HXN]) 249 request = VENDOR_READ_NREQUEST; 250 else 251 request = VENDOR_READ_REQUEST; 252 253 res = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0), 254 request, VENDOR_READ_REQUEST_TYPE, 255 value, 0, buf, 1, 100); 256 if (res != 1) { 257 dev_err(dev, "%s - failed to read [%04x]: %d\n", __func__, 258 value, res); 259 if (res >= 0) 260 res = -EIO; 261 262 return res; 263 } 264 265 dev_dbg(dev, "%s - [%04x] = %02x\n", __func__, value, buf[0]); 266 267 return 0; 268 } 269 270 static int pl2303_vendor_write(struct usb_serial *serial, u16 value, u16 index) 271 { 272 struct pl2303_serial_private *spriv = usb_get_serial_data(serial); 273 struct device *dev = &serial->interface->dev; 274 u8 request; 275 int res; 276 277 dev_dbg(dev, "%s - [%04x] = %02x\n", __func__, value, index); 278 279 if (spriv->type == &pl2303_type_data[TYPE_HXN]) 280 request = VENDOR_WRITE_NREQUEST; 281 else 282 request = VENDOR_WRITE_REQUEST; 283 284 res = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), 285 request, VENDOR_WRITE_REQUEST_TYPE, 286 value, index, NULL, 0, 100); 287 if (res) { 288 dev_err(dev, "%s - failed to write [%04x]: %d\n", __func__, 289 value, res); 290 return res; 291 } 292 293 return 0; 294 } 295 296 static int pl2303_update_reg(struct usb_serial *serial, u8 reg, u8 mask, u8 val) 297 { 298 struct pl2303_serial_private *spriv = usb_get_serial_data(serial); 299 int ret = 0; 300 u8 *buf; 301 302 buf = kmalloc(1, GFP_KERNEL); 303 if (!buf) 304 return -ENOMEM; 305 306 if (spriv->type == &pl2303_type_data[TYPE_HXN]) 307 ret = pl2303_vendor_read(serial, reg, buf); 308 else 309 ret = pl2303_vendor_read(serial, reg | 0x80, buf); 310 311 if (ret) 312 goto out_free; 313 314 *buf &= ~mask; 315 *buf |= val & mask; 316 317 ret = pl2303_vendor_write(serial, reg, *buf); 318 out_free: 319 kfree(buf); 320 321 return ret; 322 } 323 324 static int pl2303_probe(struct usb_serial *serial, 325 const struct usb_device_id *id) 326 { 327 usb_set_serial_data(serial, (void *)id->driver_info); 328 329 return 0; 330 } 331 332 /* 333 * Use interrupt endpoint from first interface if available. 334 * 335 * This is needed due to the looney way its endpoints are set up. 336 */ 337 static int pl2303_endpoint_hack(struct usb_serial *serial, 338 struct usb_serial_endpoints *epds) 339 { 340 struct usb_interface *interface = serial->interface; 341 struct usb_device *dev = serial->dev; 342 struct device *ddev = &interface->dev; 343 struct usb_host_interface *iface_desc; 344 struct usb_endpoint_descriptor *endpoint; 345 unsigned int i; 346 347 if (interface == dev->actconfig->interface[0]) 348 return 0; 349 350 /* check out the endpoints of the other interface */ 351 iface_desc = dev->actconfig->interface[0]->cur_altsetting; 352 353 for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) { 354 endpoint = &iface_desc->endpoint[i].desc; 355 356 if (!usb_endpoint_is_int_in(endpoint)) 357 continue; 358 359 dev_dbg(ddev, "found interrupt in on separate interface\n"); 360 if (epds->num_interrupt_in < ARRAY_SIZE(epds->interrupt_in)) 361 epds->interrupt_in[epds->num_interrupt_in++] = endpoint; 362 } 363 364 return 0; 365 } 366 367 static int pl2303_calc_num_ports(struct usb_serial *serial, 368 struct usb_serial_endpoints *epds) 369 { 370 unsigned long quirks = (unsigned long)usb_get_serial_data(serial); 371 struct device *dev = &serial->interface->dev; 372 int ret; 373 374 if (quirks & PL2303_QUIRK_ENDPOINT_HACK) { 375 ret = pl2303_endpoint_hack(serial, epds); 376 if (ret) 377 return ret; 378 } 379 380 if (epds->num_interrupt_in < 1) { 381 dev_err(dev, "required interrupt-in endpoint missing\n"); 382 return -ENODEV; 383 } 384 385 return 1; 386 } 387 388 static bool pl2303_supports_hx_status(struct usb_serial *serial) 389 { 390 int ret; 391 u8 buf; 392 393 ret = usb_control_msg_recv(serial->dev, 0, VENDOR_READ_REQUEST, 394 VENDOR_READ_REQUEST_TYPE, PL2303_READ_TYPE_HX_STATUS, 395 0, &buf, 1, 100, GFP_KERNEL); 396 397 return ret == 0; 398 } 399 400 static int pl2303_detect_type(struct usb_serial *serial) 401 { 402 struct usb_device_descriptor *desc = &serial->dev->descriptor; 403 u16 bcdDevice, bcdUSB; 404 405 /* 406 * Legacy PL2303H, variants 0 and 1 (difference unknown). 407 */ 408 if (desc->bDeviceClass == 0x02) 409 return TYPE_H; /* variant 0 */ 410 411 if (desc->bMaxPacketSize0 != 0x40) { 412 if (desc->bDeviceClass == 0x00 || desc->bDeviceClass == 0xff) 413 return TYPE_H; /* variant 1 */ 414 415 return TYPE_H; /* variant 0 */ 416 } 417 418 bcdDevice = le16_to_cpu(desc->bcdDevice); 419 bcdUSB = le16_to_cpu(desc->bcdUSB); 420 421 switch (bcdUSB) { 422 case 0x110: 423 switch (bcdDevice) { 424 case 0x300: 425 return TYPE_HX; 426 case 0x400: 427 return TYPE_HXD; 428 default: 429 return TYPE_HX; 430 } 431 break; 432 case 0x200: 433 switch (bcdDevice) { 434 case 0x100: 435 case 0x305: 436 case 0x405: 437 /* 438 * Assume it's an HXN-type if the device doesn't 439 * support the old read request value. 440 */ 441 if (!pl2303_supports_hx_status(serial)) 442 return TYPE_HXN; 443 break; 444 case 0x300: 445 return TYPE_TA; 446 case 0x500: 447 return TYPE_TB; 448 } 449 break; 450 } 451 452 dev_err(&serial->interface->dev, 453 "unknown device type, please report to linux-usb@vger.kernel.org\n"); 454 return -ENODEV; 455 } 456 457 static int pl2303_startup(struct usb_serial *serial) 458 { 459 struct pl2303_serial_private *spriv; 460 enum pl2303_type type; 461 unsigned char *buf; 462 int ret; 463 464 ret = pl2303_detect_type(serial); 465 if (ret < 0) 466 return ret; 467 468 type = ret; 469 dev_dbg(&serial->interface->dev, "device type: %s\n", pl2303_type_data[type].name); 470 471 spriv = kzalloc(sizeof(*spriv), GFP_KERNEL); 472 if (!spriv) 473 return -ENOMEM; 474 475 spriv->type = &pl2303_type_data[type]; 476 spriv->quirks = (unsigned long)usb_get_serial_data(serial); 477 spriv->quirks |= spriv->type->quirks; 478 479 usb_set_serial_data(serial, spriv); 480 481 if (type != TYPE_HXN) { 482 buf = kmalloc(1, GFP_KERNEL); 483 if (!buf) { 484 kfree(spriv); 485 return -ENOMEM; 486 } 487 488 pl2303_vendor_read(serial, 0x8484, buf); 489 pl2303_vendor_write(serial, 0x0404, 0); 490 pl2303_vendor_read(serial, 0x8484, buf); 491 pl2303_vendor_read(serial, 0x8383, buf); 492 pl2303_vendor_read(serial, 0x8484, buf); 493 pl2303_vendor_write(serial, 0x0404, 1); 494 pl2303_vendor_read(serial, 0x8484, buf); 495 pl2303_vendor_read(serial, 0x8383, buf); 496 pl2303_vendor_write(serial, 0, 1); 497 pl2303_vendor_write(serial, 1, 0); 498 if (spriv->quirks & PL2303_QUIRK_LEGACY) 499 pl2303_vendor_write(serial, 2, 0x24); 500 else 501 pl2303_vendor_write(serial, 2, 0x44); 502 503 kfree(buf); 504 } 505 506 return 0; 507 } 508 509 static void pl2303_release(struct usb_serial *serial) 510 { 511 struct pl2303_serial_private *spriv = usb_get_serial_data(serial); 512 513 kfree(spriv); 514 } 515 516 static int pl2303_port_probe(struct usb_serial_port *port) 517 { 518 struct pl2303_private *priv; 519 520 priv = kzalloc(sizeof(*priv), GFP_KERNEL); 521 if (!priv) 522 return -ENOMEM; 523 524 spin_lock_init(&priv->lock); 525 526 usb_set_serial_port_data(port, priv); 527 528 port->port.drain_delay = 256; 529 530 return 0; 531 } 532 533 static void pl2303_port_remove(struct usb_serial_port *port) 534 { 535 struct pl2303_private *priv = usb_get_serial_port_data(port); 536 537 kfree(priv); 538 } 539 540 static int pl2303_set_control_lines(struct usb_serial_port *port, u8 value) 541 { 542 struct usb_device *dev = port->serial->dev; 543 int retval; 544 545 dev_dbg(&port->dev, "%s - %02x\n", __func__, value); 546 547 retval = usb_control_msg(dev, usb_sndctrlpipe(dev, 0), 548 SET_CONTROL_REQUEST, SET_CONTROL_REQUEST_TYPE, 549 value, 0, NULL, 0, 100); 550 if (retval) 551 dev_err(&port->dev, "%s - failed: %d\n", __func__, retval); 552 553 return retval; 554 } 555 556 /* 557 * Returns the nearest supported baud rate that can be set directly without 558 * using divisors. 559 */ 560 static speed_t pl2303_get_supported_baud_rate(speed_t baud) 561 { 562 static const speed_t baud_sup[] = { 563 75, 150, 300, 600, 1200, 1800, 2400, 3600, 4800, 7200, 9600, 564 14400, 19200, 28800, 38400, 57600, 115200, 230400, 460800, 565 614400, 921600, 1228800, 2457600, 3000000, 6000000 566 }; 567 568 unsigned i; 569 570 for (i = 0; i < ARRAY_SIZE(baud_sup); ++i) { 571 if (baud_sup[i] > baud) 572 break; 573 } 574 575 if (i == ARRAY_SIZE(baud_sup)) 576 baud = baud_sup[i - 1]; 577 else if (i > 0 && (baud_sup[i] - baud) > (baud - baud_sup[i - 1])) 578 baud = baud_sup[i - 1]; 579 else 580 baud = baud_sup[i]; 581 582 return baud; 583 } 584 585 /* 586 * NOTE: If unsupported baud rates are set directly, the PL2303 seems to 587 * use 9600 baud. 588 */ 589 static speed_t pl2303_encode_baud_rate_direct(unsigned char buf[4], 590 speed_t baud) 591 { 592 put_unaligned_le32(baud, buf); 593 594 return baud; 595 } 596 597 static speed_t pl2303_encode_baud_rate_divisor(unsigned char buf[4], 598 speed_t baud) 599 { 600 unsigned int baseline, mantissa, exponent; 601 602 /* 603 * Apparently the formula is: 604 * baudrate = 12M * 32 / (mantissa * 4^exponent) 605 * where 606 * mantissa = buf[8:0] 607 * exponent = buf[11:9] 608 */ 609 baseline = 12000000 * 32; 610 mantissa = baseline / baud; 611 if (mantissa == 0) 612 mantissa = 1; /* Avoid dividing by zero if baud > 32*12M. */ 613 exponent = 0; 614 while (mantissa >= 512) { 615 if (exponent < 7) { 616 mantissa >>= 2; /* divide by 4 */ 617 exponent++; 618 } else { 619 /* Exponent is maxed. Trim mantissa and leave. */ 620 mantissa = 511; 621 break; 622 } 623 } 624 625 buf[3] = 0x80; 626 buf[2] = 0; 627 buf[1] = exponent << 1 | mantissa >> 8; 628 buf[0] = mantissa & 0xff; 629 630 /* Calculate and return the exact baud rate. */ 631 baud = (baseline / mantissa) >> (exponent << 1); 632 633 return baud; 634 } 635 636 static speed_t pl2303_encode_baud_rate_divisor_alt(unsigned char buf[4], 637 speed_t baud) 638 { 639 unsigned int baseline, mantissa, exponent; 640 641 /* 642 * Apparently, for the TA version the formula is: 643 * baudrate = 12M * 32 / (mantissa * 2^exponent) 644 * where 645 * mantissa = buf[10:0] 646 * exponent = buf[15:13 16] 647 */ 648 baseline = 12000000 * 32; 649 mantissa = baseline / baud; 650 if (mantissa == 0) 651 mantissa = 1; /* Avoid dividing by zero if baud > 32*12M. */ 652 exponent = 0; 653 while (mantissa >= 2048) { 654 if (exponent < 15) { 655 mantissa >>= 1; /* divide by 2 */ 656 exponent++; 657 } else { 658 /* Exponent is maxed. Trim mantissa and leave. */ 659 mantissa = 2047; 660 break; 661 } 662 } 663 664 buf[3] = 0x80; 665 buf[2] = exponent & 0x01; 666 buf[1] = (exponent & ~0x01) << 4 | mantissa >> 8; 667 buf[0] = mantissa & 0xff; 668 669 /* Calculate and return the exact baud rate. */ 670 baud = (baseline / mantissa) >> exponent; 671 672 return baud; 673 } 674 675 static void pl2303_encode_baud_rate(struct tty_struct *tty, 676 struct usb_serial_port *port, 677 u8 buf[4]) 678 { 679 struct usb_serial *serial = port->serial; 680 struct pl2303_serial_private *spriv = usb_get_serial_data(serial); 681 speed_t baud_sup; 682 speed_t baud; 683 684 baud = tty_get_baud_rate(tty); 685 dev_dbg(&port->dev, "baud requested = %u\n", baud); 686 if (!baud) 687 return; 688 689 if (spriv->type->max_baud_rate) 690 baud = min_t(speed_t, baud, spriv->type->max_baud_rate); 691 /* 692 * Use direct method for supported baud rates, otherwise use divisors. 693 * Newer chip types do not support divisor encoding. 694 */ 695 if (spriv->type->no_divisors) 696 baud_sup = baud; 697 else 698 baud_sup = pl2303_get_supported_baud_rate(baud); 699 700 if (baud == baud_sup) 701 baud = pl2303_encode_baud_rate_direct(buf, baud); 702 else if (spriv->type->alt_divisors) 703 baud = pl2303_encode_baud_rate_divisor_alt(buf, baud); 704 else 705 baud = pl2303_encode_baud_rate_divisor(buf, baud); 706 707 /* Save resulting baud rate */ 708 tty_encode_baud_rate(tty, baud, baud); 709 dev_dbg(&port->dev, "baud set = %u\n", baud); 710 } 711 712 static int pl2303_get_line_request(struct usb_serial_port *port, 713 unsigned char buf[7]) 714 { 715 struct usb_device *udev = port->serial->dev; 716 int ret; 717 718 ret = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0), 719 GET_LINE_REQUEST, GET_LINE_REQUEST_TYPE, 720 0, 0, buf, 7, 100); 721 if (ret != 7) { 722 dev_err(&port->dev, "%s - failed: %d\n", __func__, ret); 723 724 if (ret >= 0) 725 ret = -EIO; 726 727 return ret; 728 } 729 730 dev_dbg(&port->dev, "%s - %7ph\n", __func__, buf); 731 732 return 0; 733 } 734 735 static int pl2303_set_line_request(struct usb_serial_port *port, 736 unsigned char buf[7]) 737 { 738 struct usb_device *udev = port->serial->dev; 739 int ret; 740 741 ret = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), 742 SET_LINE_REQUEST, SET_LINE_REQUEST_TYPE, 743 0, 0, buf, 7, 100); 744 if (ret < 0) { 745 dev_err(&port->dev, "%s - failed: %d\n", __func__, ret); 746 return ret; 747 } 748 749 dev_dbg(&port->dev, "%s - %7ph\n", __func__, buf); 750 751 return 0; 752 } 753 754 static bool pl2303_termios_change(const struct ktermios *a, const struct ktermios *b) 755 { 756 bool ixon_change; 757 758 ixon_change = ((a->c_iflag ^ b->c_iflag) & (IXON | IXANY)) || 759 a->c_cc[VSTART] != b->c_cc[VSTART] || 760 a->c_cc[VSTOP] != b->c_cc[VSTOP]; 761 762 return tty_termios_hw_change(a, b) || ixon_change; 763 } 764 765 static bool pl2303_enable_xonxoff(struct tty_struct *tty, const struct pl2303_type_data *type) 766 { 767 if (!I_IXON(tty) || I_IXANY(tty)) 768 return false; 769 770 if (START_CHAR(tty) != 0x11 || STOP_CHAR(tty) != 0x13) 771 return false; 772 773 if (type->no_autoxonxoff) 774 return false; 775 776 return true; 777 } 778 779 static void pl2303_set_termios(struct tty_struct *tty, 780 struct usb_serial_port *port, struct ktermios *old_termios) 781 { 782 struct usb_serial *serial = port->serial; 783 struct pl2303_serial_private *spriv = usb_get_serial_data(serial); 784 struct pl2303_private *priv = usb_get_serial_port_data(port); 785 unsigned long flags; 786 unsigned char *buf; 787 int ret; 788 u8 control; 789 790 if (old_termios && !pl2303_termios_change(&tty->termios, old_termios)) 791 return; 792 793 buf = kzalloc(7, GFP_KERNEL); 794 if (!buf) { 795 /* Report back no change occurred */ 796 if (old_termios) 797 tty->termios = *old_termios; 798 return; 799 } 800 801 pl2303_get_line_request(port, buf); 802 803 buf[6] = tty_get_char_size(tty->termios.c_cflag); 804 dev_dbg(&port->dev, "data bits = %d\n", buf[6]); 805 806 /* For reference buf[0]:buf[3] baud rate value */ 807 pl2303_encode_baud_rate(tty, port, &buf[0]); 808 809 /* For reference buf[4]=0 is 1 stop bits */ 810 /* For reference buf[4]=1 is 1.5 stop bits */ 811 /* For reference buf[4]=2 is 2 stop bits */ 812 if (C_CSTOPB(tty)) { 813 /* 814 * NOTE: Comply with "real" UARTs / RS232: 815 * use 1.5 instead of 2 stop bits with 5 data bits 816 */ 817 if (C_CSIZE(tty) == CS5) { 818 buf[4] = 1; 819 dev_dbg(&port->dev, "stop bits = 1.5\n"); 820 } else { 821 buf[4] = 2; 822 dev_dbg(&port->dev, "stop bits = 2\n"); 823 } 824 } else { 825 buf[4] = 0; 826 dev_dbg(&port->dev, "stop bits = 1\n"); 827 } 828 829 if (C_PARENB(tty)) { 830 /* For reference buf[5]=0 is none parity */ 831 /* For reference buf[5]=1 is odd parity */ 832 /* For reference buf[5]=2 is even parity */ 833 /* For reference buf[5]=3 is mark parity */ 834 /* For reference buf[5]=4 is space parity */ 835 if (C_PARODD(tty)) { 836 if (C_CMSPAR(tty)) { 837 buf[5] = 3; 838 dev_dbg(&port->dev, "parity = mark\n"); 839 } else { 840 buf[5] = 1; 841 dev_dbg(&port->dev, "parity = odd\n"); 842 } 843 } else { 844 if (C_CMSPAR(tty)) { 845 buf[5] = 4; 846 dev_dbg(&port->dev, "parity = space\n"); 847 } else { 848 buf[5] = 2; 849 dev_dbg(&port->dev, "parity = even\n"); 850 } 851 } 852 } else { 853 buf[5] = 0; 854 dev_dbg(&port->dev, "parity = none\n"); 855 } 856 857 /* 858 * Some PL2303 are known to lose bytes if you change serial settings 859 * even to the same values as before. Thus we actually need to filter 860 * in this specific case. 861 * 862 * Note that the tty_termios_hw_change check above is not sufficient 863 * as a previously requested baud rate may differ from the one 864 * actually used (and stored in old_termios). 865 * 866 * NOTE: No additional locking needed for line_settings as it is 867 * only used in set_termios, which is serialised against itself. 868 */ 869 if (!old_termios || memcmp(buf, priv->line_settings, 7)) { 870 ret = pl2303_set_line_request(port, buf); 871 if (!ret) 872 memcpy(priv->line_settings, buf, 7); 873 } 874 875 /* change control lines if we are switching to or from B0 */ 876 spin_lock_irqsave(&priv->lock, flags); 877 control = priv->line_control; 878 if (C_BAUD(tty) == B0) 879 priv->line_control &= ~(CONTROL_DTR | CONTROL_RTS); 880 else if (old_termios && (old_termios->c_cflag & CBAUD) == B0) 881 priv->line_control |= (CONTROL_DTR | CONTROL_RTS); 882 if (control != priv->line_control) { 883 control = priv->line_control; 884 spin_unlock_irqrestore(&priv->lock, flags); 885 pl2303_set_control_lines(port, control); 886 } else { 887 spin_unlock_irqrestore(&priv->lock, flags); 888 } 889 890 if (C_CRTSCTS(tty)) { 891 if (spriv->quirks & PL2303_QUIRK_LEGACY) { 892 pl2303_update_reg(serial, 0, PL2303_FLOWCTRL_MASK, 0x40); 893 } else if (spriv->type == &pl2303_type_data[TYPE_HXN]) { 894 pl2303_update_reg(serial, PL2303_HXN_FLOWCTRL_REG, 895 PL2303_HXN_FLOWCTRL_MASK, 896 PL2303_HXN_FLOWCTRL_RTS_CTS); 897 } else { 898 pl2303_update_reg(serial, 0, PL2303_FLOWCTRL_MASK, 0x60); 899 } 900 } else if (pl2303_enable_xonxoff(tty, spriv->type)) { 901 if (spriv->type == &pl2303_type_data[TYPE_HXN]) { 902 pl2303_update_reg(serial, PL2303_HXN_FLOWCTRL_REG, 903 PL2303_HXN_FLOWCTRL_MASK, 904 PL2303_HXN_FLOWCTRL_XON_XOFF); 905 } else { 906 pl2303_update_reg(serial, 0, PL2303_FLOWCTRL_MASK, 0xc0); 907 } 908 } else { 909 if (spriv->type == &pl2303_type_data[TYPE_HXN]) { 910 pl2303_update_reg(serial, PL2303_HXN_FLOWCTRL_REG, 911 PL2303_HXN_FLOWCTRL_MASK, 912 PL2303_HXN_FLOWCTRL_NONE); 913 } else { 914 pl2303_update_reg(serial, 0, PL2303_FLOWCTRL_MASK, 0); 915 } 916 } 917 918 kfree(buf); 919 } 920 921 static void pl2303_dtr_rts(struct usb_serial_port *port, int on) 922 { 923 struct pl2303_private *priv = usb_get_serial_port_data(port); 924 unsigned long flags; 925 u8 control; 926 927 spin_lock_irqsave(&priv->lock, flags); 928 if (on) 929 priv->line_control |= (CONTROL_DTR | CONTROL_RTS); 930 else 931 priv->line_control &= ~(CONTROL_DTR | CONTROL_RTS); 932 control = priv->line_control; 933 spin_unlock_irqrestore(&priv->lock, flags); 934 935 pl2303_set_control_lines(port, control); 936 } 937 938 static void pl2303_close(struct usb_serial_port *port) 939 { 940 usb_serial_generic_close(port); 941 usb_kill_urb(port->interrupt_in_urb); 942 pl2303_set_break(port, false); 943 } 944 945 static int pl2303_open(struct tty_struct *tty, struct usb_serial_port *port) 946 { 947 struct usb_serial *serial = port->serial; 948 struct pl2303_serial_private *spriv = usb_get_serial_data(serial); 949 int result; 950 951 if (spriv->quirks & PL2303_QUIRK_LEGACY) { 952 usb_clear_halt(serial->dev, port->write_urb->pipe); 953 usb_clear_halt(serial->dev, port->read_urb->pipe); 954 } else { 955 /* reset upstream data pipes */ 956 if (spriv->type == &pl2303_type_data[TYPE_HXN]) { 957 pl2303_vendor_write(serial, PL2303_HXN_RESET_REG, 958 PL2303_HXN_RESET_UPSTREAM_PIPE | 959 PL2303_HXN_RESET_DOWNSTREAM_PIPE); 960 } else { 961 pl2303_vendor_write(serial, 8, 0); 962 pl2303_vendor_write(serial, 9, 0); 963 } 964 } 965 966 /* Setup termios */ 967 if (tty) 968 pl2303_set_termios(tty, port, NULL); 969 970 result = usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL); 971 if (result) { 972 dev_err(&port->dev, "failed to submit interrupt urb: %d\n", 973 result); 974 return result; 975 } 976 977 result = usb_serial_generic_open(tty, port); 978 if (result) { 979 usb_kill_urb(port->interrupt_in_urb); 980 return result; 981 } 982 983 return 0; 984 } 985 986 static int pl2303_tiocmset(struct tty_struct *tty, 987 unsigned int set, unsigned int clear) 988 { 989 struct usb_serial_port *port = tty->driver_data; 990 struct pl2303_private *priv = usb_get_serial_port_data(port); 991 unsigned long flags; 992 u8 control; 993 int ret; 994 995 spin_lock_irqsave(&priv->lock, flags); 996 if (set & TIOCM_RTS) 997 priv->line_control |= CONTROL_RTS; 998 if (set & TIOCM_DTR) 999 priv->line_control |= CONTROL_DTR; 1000 if (clear & TIOCM_RTS) 1001 priv->line_control &= ~CONTROL_RTS; 1002 if (clear & TIOCM_DTR) 1003 priv->line_control &= ~CONTROL_DTR; 1004 control = priv->line_control; 1005 spin_unlock_irqrestore(&priv->lock, flags); 1006 1007 ret = pl2303_set_control_lines(port, control); 1008 if (ret) 1009 return usb_translate_errors(ret); 1010 1011 return 0; 1012 } 1013 1014 static int pl2303_tiocmget(struct tty_struct *tty) 1015 { 1016 struct usb_serial_port *port = tty->driver_data; 1017 struct pl2303_private *priv = usb_get_serial_port_data(port); 1018 unsigned long flags; 1019 unsigned int mcr; 1020 unsigned int status; 1021 unsigned int result; 1022 1023 spin_lock_irqsave(&priv->lock, flags); 1024 mcr = priv->line_control; 1025 status = priv->line_status; 1026 spin_unlock_irqrestore(&priv->lock, flags); 1027 1028 result = ((mcr & CONTROL_DTR) ? TIOCM_DTR : 0) 1029 | ((mcr & CONTROL_RTS) ? TIOCM_RTS : 0) 1030 | ((status & UART_CTS) ? TIOCM_CTS : 0) 1031 | ((status & UART_DSR) ? TIOCM_DSR : 0) 1032 | ((status & UART_RING) ? TIOCM_RI : 0) 1033 | ((status & UART_DCD) ? TIOCM_CD : 0); 1034 1035 dev_dbg(&port->dev, "%s - result = %x\n", __func__, result); 1036 1037 return result; 1038 } 1039 1040 static int pl2303_carrier_raised(struct usb_serial_port *port) 1041 { 1042 struct pl2303_private *priv = usb_get_serial_port_data(port); 1043 1044 if (priv->line_status & UART_DCD) 1045 return 1; 1046 1047 return 0; 1048 } 1049 1050 static void pl2303_set_break(struct usb_serial_port *port, bool enable) 1051 { 1052 struct usb_serial *serial = port->serial; 1053 u16 state; 1054 int result; 1055 1056 if (enable) 1057 state = BREAK_ON; 1058 else 1059 state = BREAK_OFF; 1060 1061 dev_dbg(&port->dev, "%s - turning break %s\n", __func__, 1062 state == BREAK_OFF ? "off" : "on"); 1063 1064 result = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), 1065 BREAK_REQUEST, BREAK_REQUEST_TYPE, state, 1066 0, NULL, 0, 100); 1067 if (result) 1068 dev_err(&port->dev, "error sending break = %d\n", result); 1069 } 1070 1071 static void pl2303_break_ctl(struct tty_struct *tty, int state) 1072 { 1073 struct usb_serial_port *port = tty->driver_data; 1074 1075 pl2303_set_break(port, state); 1076 } 1077 1078 static void pl2303_update_line_status(struct usb_serial_port *port, 1079 unsigned char *data, 1080 unsigned int actual_length) 1081 { 1082 struct usb_serial *serial = port->serial; 1083 struct pl2303_serial_private *spriv = usb_get_serial_data(serial); 1084 struct pl2303_private *priv = usb_get_serial_port_data(port); 1085 struct tty_struct *tty; 1086 unsigned long flags; 1087 unsigned int status_idx = UART_STATE_INDEX; 1088 u8 status; 1089 u8 delta; 1090 1091 if (spriv->quirks & PL2303_QUIRK_UART_STATE_IDX0) 1092 status_idx = 0; 1093 1094 if (actual_length < status_idx + 1) 1095 return; 1096 1097 status = data[status_idx]; 1098 1099 /* Save off the uart status for others to look at */ 1100 spin_lock_irqsave(&priv->lock, flags); 1101 delta = priv->line_status ^ status; 1102 priv->line_status = status; 1103 spin_unlock_irqrestore(&priv->lock, flags); 1104 1105 if (status & UART_BREAK_ERROR) 1106 usb_serial_handle_break(port); 1107 1108 if (delta & UART_STATE_MSR_MASK) { 1109 if (delta & UART_CTS) 1110 port->icount.cts++; 1111 if (delta & UART_DSR) 1112 port->icount.dsr++; 1113 if (delta & UART_RING) 1114 port->icount.rng++; 1115 if (delta & UART_DCD) { 1116 port->icount.dcd++; 1117 tty = tty_port_tty_get(&port->port); 1118 if (tty) { 1119 usb_serial_handle_dcd_change(port, tty, 1120 status & UART_DCD); 1121 tty_kref_put(tty); 1122 } 1123 } 1124 1125 wake_up_interruptible(&port->port.delta_msr_wait); 1126 } 1127 } 1128 1129 static void pl2303_read_int_callback(struct urb *urb) 1130 { 1131 struct usb_serial_port *port = urb->context; 1132 unsigned char *data = urb->transfer_buffer; 1133 unsigned int actual_length = urb->actual_length; 1134 int status = urb->status; 1135 int retval; 1136 1137 switch (status) { 1138 case 0: 1139 /* success */ 1140 break; 1141 case -ECONNRESET: 1142 case -ENOENT: 1143 case -ESHUTDOWN: 1144 /* this urb is terminated, clean up */ 1145 dev_dbg(&port->dev, "%s - urb shutting down with status: %d\n", 1146 __func__, status); 1147 return; 1148 default: 1149 dev_dbg(&port->dev, "%s - nonzero urb status received: %d\n", 1150 __func__, status); 1151 goto exit; 1152 } 1153 1154 usb_serial_debug_data(&port->dev, __func__, 1155 urb->actual_length, urb->transfer_buffer); 1156 1157 pl2303_update_line_status(port, data, actual_length); 1158 1159 exit: 1160 retval = usb_submit_urb(urb, GFP_ATOMIC); 1161 if (retval) { 1162 dev_err(&port->dev, 1163 "%s - usb_submit_urb failed with result %d\n", 1164 __func__, retval); 1165 } 1166 } 1167 1168 static void pl2303_process_read_urb(struct urb *urb) 1169 { 1170 struct usb_serial_port *port = urb->context; 1171 struct pl2303_private *priv = usb_get_serial_port_data(port); 1172 unsigned char *data = urb->transfer_buffer; 1173 char tty_flag = TTY_NORMAL; 1174 unsigned long flags; 1175 u8 line_status; 1176 int i; 1177 1178 /* update line status */ 1179 spin_lock_irqsave(&priv->lock, flags); 1180 line_status = priv->line_status; 1181 priv->line_status &= ~UART_STATE_TRANSIENT_MASK; 1182 spin_unlock_irqrestore(&priv->lock, flags); 1183 1184 if (!urb->actual_length) 1185 return; 1186 1187 /* 1188 * Break takes precedence over parity, which takes precedence over 1189 * framing errors. 1190 */ 1191 if (line_status & UART_BREAK_ERROR) 1192 tty_flag = TTY_BREAK; 1193 else if (line_status & UART_PARITY_ERROR) 1194 tty_flag = TTY_PARITY; 1195 else if (line_status & UART_FRAME_ERROR) 1196 tty_flag = TTY_FRAME; 1197 1198 if (tty_flag != TTY_NORMAL) 1199 dev_dbg(&port->dev, "%s - tty_flag = %d\n", __func__, 1200 tty_flag); 1201 /* overrun is special, not associated with a char */ 1202 if (line_status & UART_OVERRUN_ERROR) 1203 tty_insert_flip_char(&port->port, 0, TTY_OVERRUN); 1204 1205 if (port->sysrq) { 1206 for (i = 0; i < urb->actual_length; ++i) 1207 if (!usb_serial_handle_sysrq_char(port, data[i])) 1208 tty_insert_flip_char(&port->port, data[i], 1209 tty_flag); 1210 } else { 1211 tty_insert_flip_string_fixed_flag(&port->port, data, tty_flag, 1212 urb->actual_length); 1213 } 1214 1215 tty_flip_buffer_push(&port->port); 1216 } 1217 1218 static struct usb_serial_driver pl2303_device = { 1219 .driver = { 1220 .owner = THIS_MODULE, 1221 .name = "pl2303", 1222 }, 1223 .id_table = id_table, 1224 .num_bulk_in = 1, 1225 .num_bulk_out = 1, 1226 .num_interrupt_in = 0, /* see pl2303_calc_num_ports */ 1227 .bulk_in_size = 256, 1228 .bulk_out_size = 256, 1229 .open = pl2303_open, 1230 .close = pl2303_close, 1231 .dtr_rts = pl2303_dtr_rts, 1232 .carrier_raised = pl2303_carrier_raised, 1233 .break_ctl = pl2303_break_ctl, 1234 .set_termios = pl2303_set_termios, 1235 .tiocmget = pl2303_tiocmget, 1236 .tiocmset = pl2303_tiocmset, 1237 .tiocmiwait = usb_serial_generic_tiocmiwait, 1238 .process_read_urb = pl2303_process_read_urb, 1239 .read_int_callback = pl2303_read_int_callback, 1240 .probe = pl2303_probe, 1241 .calc_num_ports = pl2303_calc_num_ports, 1242 .attach = pl2303_startup, 1243 .release = pl2303_release, 1244 .port_probe = pl2303_port_probe, 1245 .port_remove = pl2303_port_remove, 1246 }; 1247 1248 static struct usb_serial_driver * const serial_drivers[] = { 1249 &pl2303_device, NULL 1250 }; 1251 1252 module_usb_serial_driver(serial_drivers, id_table); 1253 1254 MODULE_DESCRIPTION("Prolific PL2303 USB to serial adaptor driver"); 1255 MODULE_LICENSE("GPL v2"); 1256