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(SMART_VENDOR_ID, SMART_PRODUCT_ID) }, 117 { USB_DEVICE(AT_VENDOR_ID, AT_VTKIT3_PRODUCT_ID) }, 118 { } /* Terminating entry */ 119 }; 120 121 MODULE_DEVICE_TABLE(usb, id_table); 122 123 #define SET_LINE_REQUEST_TYPE 0x21 124 #define SET_LINE_REQUEST 0x20 125 126 #define SET_CONTROL_REQUEST_TYPE 0x21 127 #define SET_CONTROL_REQUEST 0x22 128 #define CONTROL_DTR 0x01 129 #define CONTROL_RTS 0x02 130 131 #define BREAK_REQUEST_TYPE 0x21 132 #define BREAK_REQUEST 0x23 133 #define BREAK_ON 0xffff 134 #define BREAK_OFF 0x0000 135 136 #define GET_LINE_REQUEST_TYPE 0xa1 137 #define GET_LINE_REQUEST 0x21 138 139 #define VENDOR_WRITE_REQUEST_TYPE 0x40 140 #define VENDOR_WRITE_REQUEST 0x01 141 #define VENDOR_WRITE_NREQUEST 0x80 142 143 #define VENDOR_READ_REQUEST_TYPE 0xc0 144 #define VENDOR_READ_REQUEST 0x01 145 #define VENDOR_READ_NREQUEST 0x81 146 147 #define UART_STATE_INDEX 8 148 #define UART_STATE_MSR_MASK 0x8b 149 #define UART_STATE_TRANSIENT_MASK 0x74 150 #define UART_DCD 0x01 151 #define UART_DSR 0x02 152 #define UART_BREAK_ERROR 0x04 153 #define UART_RING 0x08 154 #define UART_FRAME_ERROR 0x10 155 #define UART_PARITY_ERROR 0x20 156 #define UART_OVERRUN_ERROR 0x40 157 #define UART_CTS 0x80 158 159 #define PL2303_FLOWCTRL_MASK 0xf0 160 161 #define PL2303_READ_TYPE_HX_STATUS 0x8080 162 163 #define PL2303_HXN_RESET_REG 0x07 164 #define PL2303_HXN_RESET_UPSTREAM_PIPE 0x02 165 #define PL2303_HXN_RESET_DOWNSTREAM_PIPE 0x01 166 167 #define PL2303_HXN_FLOWCTRL_REG 0x0a 168 #define PL2303_HXN_FLOWCTRL_MASK 0x1c 169 #define PL2303_HXN_FLOWCTRL_NONE 0x1c 170 #define PL2303_HXN_FLOWCTRL_RTS_CTS 0x18 171 #define PL2303_HXN_FLOWCTRL_XON_XOFF 0x0c 172 173 static void pl2303_set_break(struct usb_serial_port *port, bool enable); 174 175 enum pl2303_type { 176 TYPE_H, 177 TYPE_HX, 178 TYPE_TA, 179 TYPE_TB, 180 TYPE_HXD, 181 TYPE_HXN, 182 TYPE_COUNT 183 }; 184 185 struct pl2303_type_data { 186 const char *name; 187 speed_t max_baud_rate; 188 unsigned long quirks; 189 unsigned int no_autoxonxoff:1; 190 unsigned int no_divisors:1; 191 unsigned int alt_divisors:1; 192 }; 193 194 struct pl2303_serial_private { 195 const struct pl2303_type_data *type; 196 unsigned long quirks; 197 }; 198 199 struct pl2303_private { 200 spinlock_t lock; 201 u8 line_control; 202 u8 line_status; 203 204 u8 line_settings[7]; 205 }; 206 207 static const struct pl2303_type_data pl2303_type_data[TYPE_COUNT] = { 208 [TYPE_H] = { 209 .name = "H", 210 .max_baud_rate = 1228800, 211 .quirks = PL2303_QUIRK_LEGACY, 212 .no_autoxonxoff = true, 213 }, 214 [TYPE_HX] = { 215 .name = "HX", 216 .max_baud_rate = 6000000, 217 }, 218 [TYPE_TA] = { 219 .name = "TA", 220 .max_baud_rate = 6000000, 221 .alt_divisors = true, 222 }, 223 [TYPE_TB] = { 224 .name = "TB", 225 .max_baud_rate = 12000000, 226 .alt_divisors = true, 227 }, 228 [TYPE_HXD] = { 229 .name = "HXD", 230 .max_baud_rate = 12000000, 231 }, 232 [TYPE_HXN] = { 233 .name = "G", 234 .max_baud_rate = 12000000, 235 .no_divisors = true, 236 }, 237 }; 238 239 static int pl2303_vendor_read(struct usb_serial *serial, u16 value, 240 unsigned char buf[1]) 241 { 242 struct pl2303_serial_private *spriv = usb_get_serial_data(serial); 243 struct device *dev = &serial->interface->dev; 244 u8 request; 245 int res; 246 247 if (spriv->type == &pl2303_type_data[TYPE_HXN]) 248 request = VENDOR_READ_NREQUEST; 249 else 250 request = VENDOR_READ_REQUEST; 251 252 res = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0), 253 request, VENDOR_READ_REQUEST_TYPE, 254 value, 0, buf, 1, 100); 255 if (res != 1) { 256 dev_err(dev, "%s - failed to read [%04x]: %d\n", __func__, 257 value, res); 258 if (res >= 0) 259 res = -EIO; 260 261 return res; 262 } 263 264 dev_dbg(dev, "%s - [%04x] = %02x\n", __func__, value, buf[0]); 265 266 return 0; 267 } 268 269 static int pl2303_vendor_write(struct usb_serial *serial, u16 value, u16 index) 270 { 271 struct pl2303_serial_private *spriv = usb_get_serial_data(serial); 272 struct device *dev = &serial->interface->dev; 273 u8 request; 274 int res; 275 276 dev_dbg(dev, "%s - [%04x] = %02x\n", __func__, value, index); 277 278 if (spriv->type == &pl2303_type_data[TYPE_HXN]) 279 request = VENDOR_WRITE_NREQUEST; 280 else 281 request = VENDOR_WRITE_REQUEST; 282 283 res = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), 284 request, VENDOR_WRITE_REQUEST_TYPE, 285 value, index, NULL, 0, 100); 286 if (res) { 287 dev_err(dev, "%s - failed to write [%04x]: %d\n", __func__, 288 value, res); 289 return res; 290 } 291 292 return 0; 293 } 294 295 static int pl2303_update_reg(struct usb_serial *serial, u8 reg, u8 mask, u8 val) 296 { 297 struct pl2303_serial_private *spriv = usb_get_serial_data(serial); 298 int ret = 0; 299 u8 *buf; 300 301 buf = kmalloc(1, GFP_KERNEL); 302 if (!buf) 303 return -ENOMEM; 304 305 if (spriv->type == &pl2303_type_data[TYPE_HXN]) 306 ret = pl2303_vendor_read(serial, reg, buf); 307 else 308 ret = pl2303_vendor_read(serial, reg | 0x80, buf); 309 310 if (ret) 311 goto out_free; 312 313 *buf &= ~mask; 314 *buf |= val & mask; 315 316 ret = pl2303_vendor_write(serial, reg, *buf); 317 out_free: 318 kfree(buf); 319 320 return ret; 321 } 322 323 static int pl2303_probe(struct usb_serial *serial, 324 const struct usb_device_id *id) 325 { 326 usb_set_serial_data(serial, (void *)id->driver_info); 327 328 return 0; 329 } 330 331 /* 332 * Use interrupt endpoint from first interface if available. 333 * 334 * This is needed due to the looney way its endpoints are set up. 335 */ 336 static int pl2303_endpoint_hack(struct usb_serial *serial, 337 struct usb_serial_endpoints *epds) 338 { 339 struct usb_interface *interface = serial->interface; 340 struct usb_device *dev = serial->dev; 341 struct device *ddev = &interface->dev; 342 struct usb_host_interface *iface_desc; 343 struct usb_endpoint_descriptor *endpoint; 344 unsigned int i; 345 346 if (interface == dev->actconfig->interface[0]) 347 return 0; 348 349 /* check out the endpoints of the other interface */ 350 iface_desc = dev->actconfig->interface[0]->cur_altsetting; 351 352 for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) { 353 endpoint = &iface_desc->endpoint[i].desc; 354 355 if (!usb_endpoint_is_int_in(endpoint)) 356 continue; 357 358 dev_dbg(ddev, "found interrupt in on separate interface\n"); 359 if (epds->num_interrupt_in < ARRAY_SIZE(epds->interrupt_in)) 360 epds->interrupt_in[epds->num_interrupt_in++] = endpoint; 361 } 362 363 return 0; 364 } 365 366 static int pl2303_calc_num_ports(struct usb_serial *serial, 367 struct usb_serial_endpoints *epds) 368 { 369 unsigned long quirks = (unsigned long)usb_get_serial_data(serial); 370 struct device *dev = &serial->interface->dev; 371 int ret; 372 373 if (quirks & PL2303_QUIRK_ENDPOINT_HACK) { 374 ret = pl2303_endpoint_hack(serial, epds); 375 if (ret) 376 return ret; 377 } 378 379 if (epds->num_interrupt_in < 1) { 380 dev_err(dev, "required interrupt-in endpoint missing\n"); 381 return -ENODEV; 382 } 383 384 return 1; 385 } 386 387 static bool pl2303_supports_hx_status(struct usb_serial *serial) 388 { 389 int ret; 390 u8 buf; 391 392 ret = usb_control_msg_recv(serial->dev, 0, VENDOR_READ_REQUEST, 393 VENDOR_READ_REQUEST_TYPE, PL2303_READ_TYPE_HX_STATUS, 394 0, &buf, 1, 100, GFP_KERNEL); 395 396 return ret == 0; 397 } 398 399 static int pl2303_detect_type(struct usb_serial *serial) 400 { 401 struct usb_device_descriptor *desc = &serial->dev->descriptor; 402 u16 bcdDevice, bcdUSB; 403 404 /* 405 * Legacy PL2303H, variants 0 and 1 (difference unknown). 406 */ 407 if (desc->bDeviceClass == 0x02) 408 return TYPE_H; /* variant 0 */ 409 410 if (desc->bMaxPacketSize0 != 0x40) { 411 if (desc->bDeviceClass == 0x00 || desc->bDeviceClass == 0xff) 412 return TYPE_H; /* variant 1 */ 413 414 return TYPE_H; /* variant 0 */ 415 } 416 417 bcdDevice = le16_to_cpu(desc->bcdDevice); 418 bcdUSB = le16_to_cpu(desc->bcdUSB); 419 420 switch (bcdDevice) { 421 case 0x100: 422 /* 423 * Assume it's an HXN-type if the device doesn't support the old read 424 * request value. 425 */ 426 if (bcdUSB == 0x200 && !pl2303_supports_hx_status(serial)) 427 return TYPE_HXN; 428 break; 429 case 0x300: 430 if (bcdUSB == 0x200) 431 return TYPE_TA; 432 433 return TYPE_HX; 434 case 0x400: 435 return TYPE_HXD; 436 case 0x500: 437 return TYPE_TB; 438 } 439 440 dev_err(&serial->interface->dev, 441 "unknown device type, please report to linux-usb@vger.kernel.org\n"); 442 return -ENODEV; 443 } 444 445 static int pl2303_startup(struct usb_serial *serial) 446 { 447 struct pl2303_serial_private *spriv; 448 enum pl2303_type type; 449 unsigned char *buf; 450 int ret; 451 452 ret = pl2303_detect_type(serial); 453 if (ret < 0) 454 return ret; 455 456 type = ret; 457 dev_dbg(&serial->interface->dev, "device type: %s\n", pl2303_type_data[type].name); 458 459 spriv = kzalloc(sizeof(*spriv), GFP_KERNEL); 460 if (!spriv) 461 return -ENOMEM; 462 463 spriv->type = &pl2303_type_data[type]; 464 spriv->quirks = (unsigned long)usb_get_serial_data(serial); 465 spriv->quirks |= spriv->type->quirks; 466 467 usb_set_serial_data(serial, spriv); 468 469 if (type != TYPE_HXN) { 470 buf = kmalloc(1, GFP_KERNEL); 471 if (!buf) { 472 kfree(spriv); 473 return -ENOMEM; 474 } 475 476 pl2303_vendor_read(serial, 0x8484, buf); 477 pl2303_vendor_write(serial, 0x0404, 0); 478 pl2303_vendor_read(serial, 0x8484, buf); 479 pl2303_vendor_read(serial, 0x8383, buf); 480 pl2303_vendor_read(serial, 0x8484, buf); 481 pl2303_vendor_write(serial, 0x0404, 1); 482 pl2303_vendor_read(serial, 0x8484, buf); 483 pl2303_vendor_read(serial, 0x8383, buf); 484 pl2303_vendor_write(serial, 0, 1); 485 pl2303_vendor_write(serial, 1, 0); 486 if (spriv->quirks & PL2303_QUIRK_LEGACY) 487 pl2303_vendor_write(serial, 2, 0x24); 488 else 489 pl2303_vendor_write(serial, 2, 0x44); 490 491 kfree(buf); 492 } 493 494 return 0; 495 } 496 497 static void pl2303_release(struct usb_serial *serial) 498 { 499 struct pl2303_serial_private *spriv = usb_get_serial_data(serial); 500 501 kfree(spriv); 502 } 503 504 static int pl2303_port_probe(struct usb_serial_port *port) 505 { 506 struct pl2303_private *priv; 507 508 priv = kzalloc(sizeof(*priv), GFP_KERNEL); 509 if (!priv) 510 return -ENOMEM; 511 512 spin_lock_init(&priv->lock); 513 514 usb_set_serial_port_data(port, priv); 515 516 port->port.drain_delay = 256; 517 518 return 0; 519 } 520 521 static void pl2303_port_remove(struct usb_serial_port *port) 522 { 523 struct pl2303_private *priv = usb_get_serial_port_data(port); 524 525 kfree(priv); 526 } 527 528 static int pl2303_set_control_lines(struct usb_serial_port *port, u8 value) 529 { 530 struct usb_device *dev = port->serial->dev; 531 int retval; 532 533 dev_dbg(&port->dev, "%s - %02x\n", __func__, value); 534 535 retval = usb_control_msg(dev, usb_sndctrlpipe(dev, 0), 536 SET_CONTROL_REQUEST, SET_CONTROL_REQUEST_TYPE, 537 value, 0, NULL, 0, 100); 538 if (retval) 539 dev_err(&port->dev, "%s - failed: %d\n", __func__, retval); 540 541 return retval; 542 } 543 544 /* 545 * Returns the nearest supported baud rate that can be set directly without 546 * using divisors. 547 */ 548 static speed_t pl2303_get_supported_baud_rate(speed_t baud) 549 { 550 static const speed_t baud_sup[] = { 551 75, 150, 300, 600, 1200, 1800, 2400, 3600, 4800, 7200, 9600, 552 14400, 19200, 28800, 38400, 57600, 115200, 230400, 460800, 553 614400, 921600, 1228800, 2457600, 3000000, 6000000 554 }; 555 556 unsigned i; 557 558 for (i = 0; i < ARRAY_SIZE(baud_sup); ++i) { 559 if (baud_sup[i] > baud) 560 break; 561 } 562 563 if (i == ARRAY_SIZE(baud_sup)) 564 baud = baud_sup[i - 1]; 565 else if (i > 0 && (baud_sup[i] - baud) > (baud - baud_sup[i - 1])) 566 baud = baud_sup[i - 1]; 567 else 568 baud = baud_sup[i]; 569 570 return baud; 571 } 572 573 /* 574 * NOTE: If unsupported baud rates are set directly, the PL2303 seems to 575 * use 9600 baud. 576 */ 577 static speed_t pl2303_encode_baud_rate_direct(unsigned char buf[4], 578 speed_t baud) 579 { 580 put_unaligned_le32(baud, buf); 581 582 return baud; 583 } 584 585 static speed_t pl2303_encode_baud_rate_divisor(unsigned char buf[4], 586 speed_t baud) 587 { 588 unsigned int baseline, mantissa, exponent; 589 590 /* 591 * Apparently the formula is: 592 * baudrate = 12M * 32 / (mantissa * 4^exponent) 593 * where 594 * mantissa = buf[8:0] 595 * exponent = buf[11:9] 596 */ 597 baseline = 12000000 * 32; 598 mantissa = baseline / baud; 599 if (mantissa == 0) 600 mantissa = 1; /* Avoid dividing by zero if baud > 32*12M. */ 601 exponent = 0; 602 while (mantissa >= 512) { 603 if (exponent < 7) { 604 mantissa >>= 2; /* divide by 4 */ 605 exponent++; 606 } else { 607 /* Exponent is maxed. Trim mantissa and leave. */ 608 mantissa = 511; 609 break; 610 } 611 } 612 613 buf[3] = 0x80; 614 buf[2] = 0; 615 buf[1] = exponent << 1 | mantissa >> 8; 616 buf[0] = mantissa & 0xff; 617 618 /* Calculate and return the exact baud rate. */ 619 baud = (baseline / mantissa) >> (exponent << 1); 620 621 return baud; 622 } 623 624 static speed_t pl2303_encode_baud_rate_divisor_alt(unsigned char buf[4], 625 speed_t baud) 626 { 627 unsigned int baseline, mantissa, exponent; 628 629 /* 630 * Apparently, for the TA version the formula is: 631 * baudrate = 12M * 32 / (mantissa * 2^exponent) 632 * where 633 * mantissa = buf[10:0] 634 * exponent = buf[15:13 16] 635 */ 636 baseline = 12000000 * 32; 637 mantissa = baseline / baud; 638 if (mantissa == 0) 639 mantissa = 1; /* Avoid dividing by zero if baud > 32*12M. */ 640 exponent = 0; 641 while (mantissa >= 2048) { 642 if (exponent < 15) { 643 mantissa >>= 1; /* divide by 2 */ 644 exponent++; 645 } else { 646 /* Exponent is maxed. Trim mantissa and leave. */ 647 mantissa = 2047; 648 break; 649 } 650 } 651 652 buf[3] = 0x80; 653 buf[2] = exponent & 0x01; 654 buf[1] = (exponent & ~0x01) << 4 | mantissa >> 8; 655 buf[0] = mantissa & 0xff; 656 657 /* Calculate and return the exact baud rate. */ 658 baud = (baseline / mantissa) >> exponent; 659 660 return baud; 661 } 662 663 static void pl2303_encode_baud_rate(struct tty_struct *tty, 664 struct usb_serial_port *port, 665 u8 buf[4]) 666 { 667 struct usb_serial *serial = port->serial; 668 struct pl2303_serial_private *spriv = usb_get_serial_data(serial); 669 speed_t baud_sup; 670 speed_t baud; 671 672 baud = tty_get_baud_rate(tty); 673 dev_dbg(&port->dev, "baud requested = %u\n", baud); 674 if (!baud) 675 return; 676 677 if (spriv->type->max_baud_rate) 678 baud = min_t(speed_t, baud, spriv->type->max_baud_rate); 679 /* 680 * Use direct method for supported baud rates, otherwise use divisors. 681 * Newer chip types do not support divisor encoding. 682 */ 683 if (spriv->type->no_divisors) 684 baud_sup = baud; 685 else 686 baud_sup = pl2303_get_supported_baud_rate(baud); 687 688 if (baud == baud_sup) 689 baud = pl2303_encode_baud_rate_direct(buf, baud); 690 else if (spriv->type->alt_divisors) 691 baud = pl2303_encode_baud_rate_divisor_alt(buf, baud); 692 else 693 baud = pl2303_encode_baud_rate_divisor(buf, baud); 694 695 /* Save resulting baud rate */ 696 tty_encode_baud_rate(tty, baud, baud); 697 dev_dbg(&port->dev, "baud set = %u\n", baud); 698 } 699 700 static int pl2303_get_line_request(struct usb_serial_port *port, 701 unsigned char buf[7]) 702 { 703 struct usb_device *udev = port->serial->dev; 704 int ret; 705 706 ret = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0), 707 GET_LINE_REQUEST, GET_LINE_REQUEST_TYPE, 708 0, 0, buf, 7, 100); 709 if (ret != 7) { 710 dev_err(&port->dev, "%s - failed: %d\n", __func__, ret); 711 712 if (ret >= 0) 713 ret = -EIO; 714 715 return ret; 716 } 717 718 dev_dbg(&port->dev, "%s - %7ph\n", __func__, buf); 719 720 return 0; 721 } 722 723 static int pl2303_set_line_request(struct usb_serial_port *port, 724 unsigned char buf[7]) 725 { 726 struct usb_device *udev = port->serial->dev; 727 int ret; 728 729 ret = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), 730 SET_LINE_REQUEST, SET_LINE_REQUEST_TYPE, 731 0, 0, buf, 7, 100); 732 if (ret < 0) { 733 dev_err(&port->dev, "%s - failed: %d\n", __func__, ret); 734 return ret; 735 } 736 737 dev_dbg(&port->dev, "%s - %7ph\n", __func__, buf); 738 739 return 0; 740 } 741 742 static bool pl2303_termios_change(const struct ktermios *a, const struct ktermios *b) 743 { 744 bool ixon_change; 745 746 ixon_change = ((a->c_iflag ^ b->c_iflag) & (IXON | IXANY)) || 747 a->c_cc[VSTART] != b->c_cc[VSTART] || 748 a->c_cc[VSTOP] != b->c_cc[VSTOP]; 749 750 return tty_termios_hw_change(a, b) || ixon_change; 751 } 752 753 static bool pl2303_enable_xonxoff(struct tty_struct *tty, const struct pl2303_type_data *type) 754 { 755 if (!I_IXON(tty) || I_IXANY(tty)) 756 return false; 757 758 if (START_CHAR(tty) != 0x11 || STOP_CHAR(tty) != 0x13) 759 return false; 760 761 if (type->no_autoxonxoff) 762 return false; 763 764 return true; 765 } 766 767 static void pl2303_set_termios(struct tty_struct *tty, 768 struct usb_serial_port *port, struct ktermios *old_termios) 769 { 770 struct usb_serial *serial = port->serial; 771 struct pl2303_serial_private *spriv = usb_get_serial_data(serial); 772 struct pl2303_private *priv = usb_get_serial_port_data(port); 773 unsigned long flags; 774 unsigned char *buf; 775 int ret; 776 u8 control; 777 778 if (old_termios && !pl2303_termios_change(&tty->termios, old_termios)) 779 return; 780 781 buf = kzalloc(7, GFP_KERNEL); 782 if (!buf) { 783 /* Report back no change occurred */ 784 if (old_termios) 785 tty->termios = *old_termios; 786 return; 787 } 788 789 pl2303_get_line_request(port, buf); 790 791 switch (C_CSIZE(tty)) { 792 case CS5: 793 buf[6] = 5; 794 break; 795 case CS6: 796 buf[6] = 6; 797 break; 798 case CS7: 799 buf[6] = 7; 800 break; 801 default: 802 case CS8: 803 buf[6] = 8; 804 } 805 dev_dbg(&port->dev, "data bits = %d\n", buf[6]); 806 807 /* For reference buf[0]:buf[3] baud rate value */ 808 pl2303_encode_baud_rate(tty, port, &buf[0]); 809 810 /* For reference buf[4]=0 is 1 stop bits */ 811 /* For reference buf[4]=1 is 1.5 stop bits */ 812 /* For reference buf[4]=2 is 2 stop bits */ 813 if (C_CSTOPB(tty)) { 814 /* 815 * NOTE: Comply with "real" UARTs / RS232: 816 * use 1.5 instead of 2 stop bits with 5 data bits 817 */ 818 if (C_CSIZE(tty) == CS5) { 819 buf[4] = 1; 820 dev_dbg(&port->dev, "stop bits = 1.5\n"); 821 } else { 822 buf[4] = 2; 823 dev_dbg(&port->dev, "stop bits = 2\n"); 824 } 825 } else { 826 buf[4] = 0; 827 dev_dbg(&port->dev, "stop bits = 1\n"); 828 } 829 830 if (C_PARENB(tty)) { 831 /* For reference buf[5]=0 is none parity */ 832 /* For reference buf[5]=1 is odd parity */ 833 /* For reference buf[5]=2 is even parity */ 834 /* For reference buf[5]=3 is mark parity */ 835 /* For reference buf[5]=4 is space parity */ 836 if (C_PARODD(tty)) { 837 if (C_CMSPAR(tty)) { 838 buf[5] = 3; 839 dev_dbg(&port->dev, "parity = mark\n"); 840 } else { 841 buf[5] = 1; 842 dev_dbg(&port->dev, "parity = odd\n"); 843 } 844 } else { 845 if (C_CMSPAR(tty)) { 846 buf[5] = 4; 847 dev_dbg(&port->dev, "parity = space\n"); 848 } else { 849 buf[5] = 2; 850 dev_dbg(&port->dev, "parity = even\n"); 851 } 852 } 853 } else { 854 buf[5] = 0; 855 dev_dbg(&port->dev, "parity = none\n"); 856 } 857 858 /* 859 * Some PL2303 are known to lose bytes if you change serial settings 860 * even to the same values as before. Thus we actually need to filter 861 * in this specific case. 862 * 863 * Note that the tty_termios_hw_change check above is not sufficient 864 * as a previously requested baud rate may differ from the one 865 * actually used (and stored in old_termios). 866 * 867 * NOTE: No additional locking needed for line_settings as it is 868 * only used in set_termios, which is serialised against itself. 869 */ 870 if (!old_termios || memcmp(buf, priv->line_settings, 7)) { 871 ret = pl2303_set_line_request(port, buf); 872 if (!ret) 873 memcpy(priv->line_settings, buf, 7); 874 } 875 876 /* change control lines if we are switching to or from B0 */ 877 spin_lock_irqsave(&priv->lock, flags); 878 control = priv->line_control; 879 if (C_BAUD(tty) == B0) 880 priv->line_control &= ~(CONTROL_DTR | CONTROL_RTS); 881 else if (old_termios && (old_termios->c_cflag & CBAUD) == B0) 882 priv->line_control |= (CONTROL_DTR | CONTROL_RTS); 883 if (control != priv->line_control) { 884 control = priv->line_control; 885 spin_unlock_irqrestore(&priv->lock, flags); 886 pl2303_set_control_lines(port, control); 887 } else { 888 spin_unlock_irqrestore(&priv->lock, flags); 889 } 890 891 if (C_CRTSCTS(tty)) { 892 if (spriv->quirks & PL2303_QUIRK_LEGACY) { 893 pl2303_update_reg(serial, 0, PL2303_FLOWCTRL_MASK, 0x40); 894 } else if (spriv->type == &pl2303_type_data[TYPE_HXN]) { 895 pl2303_update_reg(serial, PL2303_HXN_FLOWCTRL_REG, 896 PL2303_HXN_FLOWCTRL_MASK, 897 PL2303_HXN_FLOWCTRL_RTS_CTS); 898 } else { 899 pl2303_update_reg(serial, 0, PL2303_FLOWCTRL_MASK, 0x60); 900 } 901 } else if (pl2303_enable_xonxoff(tty, spriv->type)) { 902 if (spriv->type == &pl2303_type_data[TYPE_HXN]) { 903 pl2303_update_reg(serial, PL2303_HXN_FLOWCTRL_REG, 904 PL2303_HXN_FLOWCTRL_MASK, 905 PL2303_HXN_FLOWCTRL_XON_XOFF); 906 } else { 907 pl2303_update_reg(serial, 0, PL2303_FLOWCTRL_MASK, 0xc0); 908 } 909 } else { 910 if (spriv->type == &pl2303_type_data[TYPE_HXN]) { 911 pl2303_update_reg(serial, PL2303_HXN_FLOWCTRL_REG, 912 PL2303_HXN_FLOWCTRL_MASK, 913 PL2303_HXN_FLOWCTRL_NONE); 914 } else { 915 pl2303_update_reg(serial, 0, PL2303_FLOWCTRL_MASK, 0); 916 } 917 } 918 919 kfree(buf); 920 } 921 922 static void pl2303_dtr_rts(struct usb_serial_port *port, int on) 923 { 924 struct pl2303_private *priv = usb_get_serial_port_data(port); 925 unsigned long flags; 926 u8 control; 927 928 spin_lock_irqsave(&priv->lock, flags); 929 if (on) 930 priv->line_control |= (CONTROL_DTR | CONTROL_RTS); 931 else 932 priv->line_control &= ~(CONTROL_DTR | CONTROL_RTS); 933 control = priv->line_control; 934 spin_unlock_irqrestore(&priv->lock, flags); 935 936 pl2303_set_control_lines(port, control); 937 } 938 939 static void pl2303_close(struct usb_serial_port *port) 940 { 941 usb_serial_generic_close(port); 942 usb_kill_urb(port->interrupt_in_urb); 943 pl2303_set_break(port, false); 944 } 945 946 static int pl2303_open(struct tty_struct *tty, struct usb_serial_port *port) 947 { 948 struct usb_serial *serial = port->serial; 949 struct pl2303_serial_private *spriv = usb_get_serial_data(serial); 950 int result; 951 952 if (spriv->quirks & PL2303_QUIRK_LEGACY) { 953 usb_clear_halt(serial->dev, port->write_urb->pipe); 954 usb_clear_halt(serial->dev, port->read_urb->pipe); 955 } else { 956 /* reset upstream data pipes */ 957 if (spriv->type == &pl2303_type_data[TYPE_HXN]) { 958 pl2303_vendor_write(serial, PL2303_HXN_RESET_REG, 959 PL2303_HXN_RESET_UPSTREAM_PIPE | 960 PL2303_HXN_RESET_DOWNSTREAM_PIPE); 961 } else { 962 pl2303_vendor_write(serial, 8, 0); 963 pl2303_vendor_write(serial, 9, 0); 964 } 965 } 966 967 /* Setup termios */ 968 if (tty) 969 pl2303_set_termios(tty, port, NULL); 970 971 result = usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL); 972 if (result) { 973 dev_err(&port->dev, "failed to submit interrupt urb: %d\n", 974 result); 975 return result; 976 } 977 978 result = usb_serial_generic_open(tty, port); 979 if (result) { 980 usb_kill_urb(port->interrupt_in_urb); 981 return result; 982 } 983 984 return 0; 985 } 986 987 static int pl2303_tiocmset(struct tty_struct *tty, 988 unsigned int set, unsigned int clear) 989 { 990 struct usb_serial_port *port = tty->driver_data; 991 struct pl2303_private *priv = usb_get_serial_port_data(port); 992 unsigned long flags; 993 u8 control; 994 int ret; 995 996 spin_lock_irqsave(&priv->lock, flags); 997 if (set & TIOCM_RTS) 998 priv->line_control |= CONTROL_RTS; 999 if (set & TIOCM_DTR) 1000 priv->line_control |= CONTROL_DTR; 1001 if (clear & TIOCM_RTS) 1002 priv->line_control &= ~CONTROL_RTS; 1003 if (clear & TIOCM_DTR) 1004 priv->line_control &= ~CONTROL_DTR; 1005 control = priv->line_control; 1006 spin_unlock_irqrestore(&priv->lock, flags); 1007 1008 ret = pl2303_set_control_lines(port, control); 1009 if (ret) 1010 return usb_translate_errors(ret); 1011 1012 return 0; 1013 } 1014 1015 static int pl2303_tiocmget(struct tty_struct *tty) 1016 { 1017 struct usb_serial_port *port = tty->driver_data; 1018 struct pl2303_private *priv = usb_get_serial_port_data(port); 1019 unsigned long flags; 1020 unsigned int mcr; 1021 unsigned int status; 1022 unsigned int result; 1023 1024 spin_lock_irqsave(&priv->lock, flags); 1025 mcr = priv->line_control; 1026 status = priv->line_status; 1027 spin_unlock_irqrestore(&priv->lock, flags); 1028 1029 result = ((mcr & CONTROL_DTR) ? TIOCM_DTR : 0) 1030 | ((mcr & CONTROL_RTS) ? TIOCM_RTS : 0) 1031 | ((status & UART_CTS) ? TIOCM_CTS : 0) 1032 | ((status & UART_DSR) ? TIOCM_DSR : 0) 1033 | ((status & UART_RING) ? TIOCM_RI : 0) 1034 | ((status & UART_DCD) ? TIOCM_CD : 0); 1035 1036 dev_dbg(&port->dev, "%s - result = %x\n", __func__, result); 1037 1038 return result; 1039 } 1040 1041 static int pl2303_carrier_raised(struct usb_serial_port *port) 1042 { 1043 struct pl2303_private *priv = usb_get_serial_port_data(port); 1044 1045 if (priv->line_status & UART_DCD) 1046 return 1; 1047 1048 return 0; 1049 } 1050 1051 static void pl2303_set_break(struct usb_serial_port *port, bool enable) 1052 { 1053 struct usb_serial *serial = port->serial; 1054 u16 state; 1055 int result; 1056 1057 if (enable) 1058 state = BREAK_ON; 1059 else 1060 state = BREAK_OFF; 1061 1062 dev_dbg(&port->dev, "%s - turning break %s\n", __func__, 1063 state == BREAK_OFF ? "off" : "on"); 1064 1065 result = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), 1066 BREAK_REQUEST, BREAK_REQUEST_TYPE, state, 1067 0, NULL, 0, 100); 1068 if (result) 1069 dev_err(&port->dev, "error sending break = %d\n", result); 1070 } 1071 1072 static void pl2303_break_ctl(struct tty_struct *tty, int state) 1073 { 1074 struct usb_serial_port *port = tty->driver_data; 1075 1076 pl2303_set_break(port, state); 1077 } 1078 1079 static void pl2303_update_line_status(struct usb_serial_port *port, 1080 unsigned char *data, 1081 unsigned int actual_length) 1082 { 1083 struct usb_serial *serial = port->serial; 1084 struct pl2303_serial_private *spriv = usb_get_serial_data(serial); 1085 struct pl2303_private *priv = usb_get_serial_port_data(port); 1086 struct tty_struct *tty; 1087 unsigned long flags; 1088 unsigned int status_idx = UART_STATE_INDEX; 1089 u8 status; 1090 u8 delta; 1091 1092 if (spriv->quirks & PL2303_QUIRK_UART_STATE_IDX0) 1093 status_idx = 0; 1094 1095 if (actual_length < status_idx + 1) 1096 return; 1097 1098 status = data[status_idx]; 1099 1100 /* Save off the uart status for others to look at */ 1101 spin_lock_irqsave(&priv->lock, flags); 1102 delta = priv->line_status ^ status; 1103 priv->line_status = status; 1104 spin_unlock_irqrestore(&priv->lock, flags); 1105 1106 if (status & UART_BREAK_ERROR) 1107 usb_serial_handle_break(port); 1108 1109 if (delta & UART_STATE_MSR_MASK) { 1110 if (delta & UART_CTS) 1111 port->icount.cts++; 1112 if (delta & UART_DSR) 1113 port->icount.dsr++; 1114 if (delta & UART_RING) 1115 port->icount.rng++; 1116 if (delta & UART_DCD) { 1117 port->icount.dcd++; 1118 tty = tty_port_tty_get(&port->port); 1119 if (tty) { 1120 usb_serial_handle_dcd_change(port, tty, 1121 status & UART_DCD); 1122 tty_kref_put(tty); 1123 } 1124 } 1125 1126 wake_up_interruptible(&port->port.delta_msr_wait); 1127 } 1128 } 1129 1130 static void pl2303_read_int_callback(struct urb *urb) 1131 { 1132 struct usb_serial_port *port = urb->context; 1133 unsigned char *data = urb->transfer_buffer; 1134 unsigned int actual_length = urb->actual_length; 1135 int status = urb->status; 1136 int retval; 1137 1138 switch (status) { 1139 case 0: 1140 /* success */ 1141 break; 1142 case -ECONNRESET: 1143 case -ENOENT: 1144 case -ESHUTDOWN: 1145 /* this urb is terminated, clean up */ 1146 dev_dbg(&port->dev, "%s - urb shutting down with status: %d\n", 1147 __func__, status); 1148 return; 1149 default: 1150 dev_dbg(&port->dev, "%s - nonzero urb status received: %d\n", 1151 __func__, status); 1152 goto exit; 1153 } 1154 1155 usb_serial_debug_data(&port->dev, __func__, 1156 urb->actual_length, urb->transfer_buffer); 1157 1158 pl2303_update_line_status(port, data, actual_length); 1159 1160 exit: 1161 retval = usb_submit_urb(urb, GFP_ATOMIC); 1162 if (retval) { 1163 dev_err(&port->dev, 1164 "%s - usb_submit_urb failed with result %d\n", 1165 __func__, retval); 1166 } 1167 } 1168 1169 static void pl2303_process_read_urb(struct urb *urb) 1170 { 1171 struct usb_serial_port *port = urb->context; 1172 struct pl2303_private *priv = usb_get_serial_port_data(port); 1173 unsigned char *data = urb->transfer_buffer; 1174 char tty_flag = TTY_NORMAL; 1175 unsigned long flags; 1176 u8 line_status; 1177 int i; 1178 1179 /* update line status */ 1180 spin_lock_irqsave(&priv->lock, flags); 1181 line_status = priv->line_status; 1182 priv->line_status &= ~UART_STATE_TRANSIENT_MASK; 1183 spin_unlock_irqrestore(&priv->lock, flags); 1184 1185 if (!urb->actual_length) 1186 return; 1187 1188 /* 1189 * Break takes precedence over parity, which takes precedence over 1190 * framing errors. 1191 */ 1192 if (line_status & UART_BREAK_ERROR) 1193 tty_flag = TTY_BREAK; 1194 else if (line_status & UART_PARITY_ERROR) 1195 tty_flag = TTY_PARITY; 1196 else if (line_status & UART_FRAME_ERROR) 1197 tty_flag = TTY_FRAME; 1198 1199 if (tty_flag != TTY_NORMAL) 1200 dev_dbg(&port->dev, "%s - tty_flag = %d\n", __func__, 1201 tty_flag); 1202 /* overrun is special, not associated with a char */ 1203 if (line_status & UART_OVERRUN_ERROR) 1204 tty_insert_flip_char(&port->port, 0, TTY_OVERRUN); 1205 1206 if (port->sysrq) { 1207 for (i = 0; i < urb->actual_length; ++i) 1208 if (!usb_serial_handle_sysrq_char(port, data[i])) 1209 tty_insert_flip_char(&port->port, data[i], 1210 tty_flag); 1211 } else { 1212 tty_insert_flip_string_fixed_flag(&port->port, data, tty_flag, 1213 urb->actual_length); 1214 } 1215 1216 tty_flip_buffer_push(&port->port); 1217 } 1218 1219 static struct usb_serial_driver pl2303_device = { 1220 .driver = { 1221 .owner = THIS_MODULE, 1222 .name = "pl2303", 1223 }, 1224 .id_table = id_table, 1225 .num_bulk_in = 1, 1226 .num_bulk_out = 1, 1227 .num_interrupt_in = 0, /* see pl2303_calc_num_ports */ 1228 .bulk_in_size = 256, 1229 .bulk_out_size = 256, 1230 .open = pl2303_open, 1231 .close = pl2303_close, 1232 .dtr_rts = pl2303_dtr_rts, 1233 .carrier_raised = pl2303_carrier_raised, 1234 .break_ctl = pl2303_break_ctl, 1235 .set_termios = pl2303_set_termios, 1236 .tiocmget = pl2303_tiocmget, 1237 .tiocmset = pl2303_tiocmset, 1238 .tiocmiwait = usb_serial_generic_tiocmiwait, 1239 .process_read_urb = pl2303_process_read_urb, 1240 .read_int_callback = pl2303_read_int_callback, 1241 .probe = pl2303_probe, 1242 .calc_num_ports = pl2303_calc_num_ports, 1243 .attach = pl2303_startup, 1244 .release = pl2303_release, 1245 .port_probe = pl2303_port_probe, 1246 .port_remove = pl2303_port_remove, 1247 }; 1248 1249 static struct usb_serial_driver * const serial_drivers[] = { 1250 &pl2303_device, NULL 1251 }; 1252 1253 module_usb_serial_driver(serial_drivers, id_table); 1254 1255 MODULE_DESCRIPTION("Prolific PL2303 USB to serial adaptor driver"); 1256 MODULE_LICENSE("GPL v2"); 1257