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 0x101: 425 /* USB 1.0.1? Let's assume they meant 1.1... */ 426 fallthrough; 427 case 0x110: 428 switch (bcdDevice) { 429 case 0x300: 430 return TYPE_HX; 431 case 0x400: 432 return TYPE_HXD; 433 default: 434 return TYPE_HX; 435 } 436 break; 437 case 0x200: 438 switch (bcdDevice) { 439 case 0x100: 440 case 0x105: 441 case 0x305: 442 case 0x405: 443 case 0x605: 444 /* 445 * Assume it's an HXN-type if the device doesn't 446 * support the old read request value. 447 */ 448 if (!pl2303_supports_hx_status(serial)) 449 return TYPE_HXN; 450 break; 451 case 0x300: 452 return TYPE_TA; 453 case 0x500: 454 return TYPE_TB; 455 } 456 break; 457 } 458 459 dev_err(&serial->interface->dev, 460 "unknown device type, please report to linux-usb@vger.kernel.org\n"); 461 return -ENODEV; 462 } 463 464 static int pl2303_startup(struct usb_serial *serial) 465 { 466 struct pl2303_serial_private *spriv; 467 enum pl2303_type type; 468 unsigned char *buf; 469 int ret; 470 471 ret = pl2303_detect_type(serial); 472 if (ret < 0) 473 return ret; 474 475 type = ret; 476 dev_dbg(&serial->interface->dev, "device type: %s\n", pl2303_type_data[type].name); 477 478 spriv = kzalloc(sizeof(*spriv), GFP_KERNEL); 479 if (!spriv) 480 return -ENOMEM; 481 482 spriv->type = &pl2303_type_data[type]; 483 spriv->quirks = (unsigned long)usb_get_serial_data(serial); 484 spriv->quirks |= spriv->type->quirks; 485 486 usb_set_serial_data(serial, spriv); 487 488 if (type != TYPE_HXN) { 489 buf = kmalloc(1, GFP_KERNEL); 490 if (!buf) { 491 kfree(spriv); 492 return -ENOMEM; 493 } 494 495 pl2303_vendor_read(serial, 0x8484, buf); 496 pl2303_vendor_write(serial, 0x0404, 0); 497 pl2303_vendor_read(serial, 0x8484, buf); 498 pl2303_vendor_read(serial, 0x8383, buf); 499 pl2303_vendor_read(serial, 0x8484, buf); 500 pl2303_vendor_write(serial, 0x0404, 1); 501 pl2303_vendor_read(serial, 0x8484, buf); 502 pl2303_vendor_read(serial, 0x8383, buf); 503 pl2303_vendor_write(serial, 0, 1); 504 pl2303_vendor_write(serial, 1, 0); 505 if (spriv->quirks & PL2303_QUIRK_LEGACY) 506 pl2303_vendor_write(serial, 2, 0x24); 507 else 508 pl2303_vendor_write(serial, 2, 0x44); 509 510 kfree(buf); 511 } 512 513 return 0; 514 } 515 516 static void pl2303_release(struct usb_serial *serial) 517 { 518 struct pl2303_serial_private *spriv = usb_get_serial_data(serial); 519 520 kfree(spriv); 521 } 522 523 static int pl2303_port_probe(struct usb_serial_port *port) 524 { 525 struct pl2303_private *priv; 526 527 priv = kzalloc(sizeof(*priv), GFP_KERNEL); 528 if (!priv) 529 return -ENOMEM; 530 531 spin_lock_init(&priv->lock); 532 533 usb_set_serial_port_data(port, priv); 534 535 port->port.drain_delay = 256; 536 537 return 0; 538 } 539 540 static void pl2303_port_remove(struct usb_serial_port *port) 541 { 542 struct pl2303_private *priv = usb_get_serial_port_data(port); 543 544 kfree(priv); 545 } 546 547 static int pl2303_set_control_lines(struct usb_serial_port *port, u8 value) 548 { 549 struct usb_device *dev = port->serial->dev; 550 int retval; 551 552 dev_dbg(&port->dev, "%s - %02x\n", __func__, value); 553 554 retval = usb_control_msg(dev, usb_sndctrlpipe(dev, 0), 555 SET_CONTROL_REQUEST, SET_CONTROL_REQUEST_TYPE, 556 value, 0, NULL, 0, 100); 557 if (retval) 558 dev_err(&port->dev, "%s - failed: %d\n", __func__, retval); 559 560 return retval; 561 } 562 563 /* 564 * Returns the nearest supported baud rate that can be set directly without 565 * using divisors. 566 */ 567 static speed_t pl2303_get_supported_baud_rate(speed_t baud) 568 { 569 static const speed_t baud_sup[] = { 570 75, 150, 300, 600, 1200, 1800, 2400, 3600, 4800, 7200, 9600, 571 14400, 19200, 28800, 38400, 57600, 115200, 230400, 460800, 572 614400, 921600, 1228800, 2457600, 3000000, 6000000 573 }; 574 575 unsigned i; 576 577 for (i = 0; i < ARRAY_SIZE(baud_sup); ++i) { 578 if (baud_sup[i] > baud) 579 break; 580 } 581 582 if (i == ARRAY_SIZE(baud_sup)) 583 baud = baud_sup[i - 1]; 584 else if (i > 0 && (baud_sup[i] - baud) > (baud - baud_sup[i - 1])) 585 baud = baud_sup[i - 1]; 586 else 587 baud = baud_sup[i]; 588 589 return baud; 590 } 591 592 /* 593 * NOTE: If unsupported baud rates are set directly, the PL2303 seems to 594 * use 9600 baud. 595 */ 596 static speed_t pl2303_encode_baud_rate_direct(unsigned char buf[4], 597 speed_t baud) 598 { 599 put_unaligned_le32(baud, buf); 600 601 return baud; 602 } 603 604 static speed_t pl2303_encode_baud_rate_divisor(unsigned char buf[4], 605 speed_t baud) 606 { 607 unsigned int baseline, mantissa, exponent; 608 609 /* 610 * Apparently the formula is: 611 * baudrate = 12M * 32 / (mantissa * 4^exponent) 612 * where 613 * mantissa = buf[8:0] 614 * exponent = buf[11:9] 615 */ 616 baseline = 12000000 * 32; 617 mantissa = baseline / baud; 618 if (mantissa == 0) 619 mantissa = 1; /* Avoid dividing by zero if baud > 32*12M. */ 620 exponent = 0; 621 while (mantissa >= 512) { 622 if (exponent < 7) { 623 mantissa >>= 2; /* divide by 4 */ 624 exponent++; 625 } else { 626 /* Exponent is maxed. Trim mantissa and leave. */ 627 mantissa = 511; 628 break; 629 } 630 } 631 632 buf[3] = 0x80; 633 buf[2] = 0; 634 buf[1] = exponent << 1 | mantissa >> 8; 635 buf[0] = mantissa & 0xff; 636 637 /* Calculate and return the exact baud rate. */ 638 baud = (baseline / mantissa) >> (exponent << 1); 639 640 return baud; 641 } 642 643 static speed_t pl2303_encode_baud_rate_divisor_alt(unsigned char buf[4], 644 speed_t baud) 645 { 646 unsigned int baseline, mantissa, exponent; 647 648 /* 649 * Apparently, for the TA version the formula is: 650 * baudrate = 12M * 32 / (mantissa * 2^exponent) 651 * where 652 * mantissa = buf[10:0] 653 * exponent = buf[15:13 16] 654 */ 655 baseline = 12000000 * 32; 656 mantissa = baseline / baud; 657 if (mantissa == 0) 658 mantissa = 1; /* Avoid dividing by zero if baud > 32*12M. */ 659 exponent = 0; 660 while (mantissa >= 2048) { 661 if (exponent < 15) { 662 mantissa >>= 1; /* divide by 2 */ 663 exponent++; 664 } else { 665 /* Exponent is maxed. Trim mantissa and leave. */ 666 mantissa = 2047; 667 break; 668 } 669 } 670 671 buf[3] = 0x80; 672 buf[2] = exponent & 0x01; 673 buf[1] = (exponent & ~0x01) << 4 | mantissa >> 8; 674 buf[0] = mantissa & 0xff; 675 676 /* Calculate and return the exact baud rate. */ 677 baud = (baseline / mantissa) >> exponent; 678 679 return baud; 680 } 681 682 static void pl2303_encode_baud_rate(struct tty_struct *tty, 683 struct usb_serial_port *port, 684 u8 buf[4]) 685 { 686 struct usb_serial *serial = port->serial; 687 struct pl2303_serial_private *spriv = usb_get_serial_data(serial); 688 speed_t baud_sup; 689 speed_t baud; 690 691 baud = tty_get_baud_rate(tty); 692 dev_dbg(&port->dev, "baud requested = %u\n", baud); 693 if (!baud) 694 return; 695 696 if (spriv->type->max_baud_rate) 697 baud = min_t(speed_t, baud, spriv->type->max_baud_rate); 698 /* 699 * Use direct method for supported baud rates, otherwise use divisors. 700 * Newer chip types do not support divisor encoding. 701 */ 702 if (spriv->type->no_divisors) 703 baud_sup = baud; 704 else 705 baud_sup = pl2303_get_supported_baud_rate(baud); 706 707 if (baud == baud_sup) 708 baud = pl2303_encode_baud_rate_direct(buf, baud); 709 else if (spriv->type->alt_divisors) 710 baud = pl2303_encode_baud_rate_divisor_alt(buf, baud); 711 else 712 baud = pl2303_encode_baud_rate_divisor(buf, baud); 713 714 /* Save resulting baud rate */ 715 tty_encode_baud_rate(tty, baud, baud); 716 dev_dbg(&port->dev, "baud set = %u\n", baud); 717 } 718 719 static int pl2303_get_line_request(struct usb_serial_port *port, 720 unsigned char buf[7]) 721 { 722 struct usb_device *udev = port->serial->dev; 723 int ret; 724 725 ret = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0), 726 GET_LINE_REQUEST, GET_LINE_REQUEST_TYPE, 727 0, 0, buf, 7, 100); 728 if (ret != 7) { 729 dev_err(&port->dev, "%s - failed: %d\n", __func__, ret); 730 731 if (ret >= 0) 732 ret = -EIO; 733 734 return ret; 735 } 736 737 dev_dbg(&port->dev, "%s - %7ph\n", __func__, buf); 738 739 return 0; 740 } 741 742 static int pl2303_set_line_request(struct usb_serial_port *port, 743 unsigned char buf[7]) 744 { 745 struct usb_device *udev = port->serial->dev; 746 int ret; 747 748 ret = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), 749 SET_LINE_REQUEST, SET_LINE_REQUEST_TYPE, 750 0, 0, buf, 7, 100); 751 if (ret < 0) { 752 dev_err(&port->dev, "%s - failed: %d\n", __func__, ret); 753 return ret; 754 } 755 756 dev_dbg(&port->dev, "%s - %7ph\n", __func__, buf); 757 758 return 0; 759 } 760 761 static bool pl2303_termios_change(const struct ktermios *a, const struct ktermios *b) 762 { 763 bool ixon_change; 764 765 ixon_change = ((a->c_iflag ^ b->c_iflag) & (IXON | IXANY)) || 766 a->c_cc[VSTART] != b->c_cc[VSTART] || 767 a->c_cc[VSTOP] != b->c_cc[VSTOP]; 768 769 return tty_termios_hw_change(a, b) || ixon_change; 770 } 771 772 static bool pl2303_enable_xonxoff(struct tty_struct *tty, const struct pl2303_type_data *type) 773 { 774 if (!I_IXON(tty) || I_IXANY(tty)) 775 return false; 776 777 if (START_CHAR(tty) != 0x11 || STOP_CHAR(tty) != 0x13) 778 return false; 779 780 if (type->no_autoxonxoff) 781 return false; 782 783 return true; 784 } 785 786 static void pl2303_set_termios(struct tty_struct *tty, 787 struct usb_serial_port *port, struct ktermios *old_termios) 788 { 789 struct usb_serial *serial = port->serial; 790 struct pl2303_serial_private *spriv = usb_get_serial_data(serial); 791 struct pl2303_private *priv = usb_get_serial_port_data(port); 792 unsigned long flags; 793 unsigned char *buf; 794 int ret; 795 u8 control; 796 797 if (old_termios && !pl2303_termios_change(&tty->termios, old_termios)) 798 return; 799 800 buf = kzalloc(7, GFP_KERNEL); 801 if (!buf) { 802 /* Report back no change occurred */ 803 if (old_termios) 804 tty->termios = *old_termios; 805 return; 806 } 807 808 pl2303_get_line_request(port, buf); 809 810 buf[6] = tty_get_char_size(tty->termios.c_cflag); 811 dev_dbg(&port->dev, "data bits = %d\n", buf[6]); 812 813 /* For reference buf[0]:buf[3] baud rate value */ 814 pl2303_encode_baud_rate(tty, port, &buf[0]); 815 816 /* For reference buf[4]=0 is 1 stop bits */ 817 /* For reference buf[4]=1 is 1.5 stop bits */ 818 /* For reference buf[4]=2 is 2 stop bits */ 819 if (C_CSTOPB(tty)) { 820 /* 821 * NOTE: Comply with "real" UARTs / RS232: 822 * use 1.5 instead of 2 stop bits with 5 data bits 823 */ 824 if (C_CSIZE(tty) == CS5) { 825 buf[4] = 1; 826 dev_dbg(&port->dev, "stop bits = 1.5\n"); 827 } else { 828 buf[4] = 2; 829 dev_dbg(&port->dev, "stop bits = 2\n"); 830 } 831 } else { 832 buf[4] = 0; 833 dev_dbg(&port->dev, "stop bits = 1\n"); 834 } 835 836 if (C_PARENB(tty)) { 837 /* For reference buf[5]=0 is none parity */ 838 /* For reference buf[5]=1 is odd parity */ 839 /* For reference buf[5]=2 is even parity */ 840 /* For reference buf[5]=3 is mark parity */ 841 /* For reference buf[5]=4 is space parity */ 842 if (C_PARODD(tty)) { 843 if (C_CMSPAR(tty)) { 844 buf[5] = 3; 845 dev_dbg(&port->dev, "parity = mark\n"); 846 } else { 847 buf[5] = 1; 848 dev_dbg(&port->dev, "parity = odd\n"); 849 } 850 } else { 851 if (C_CMSPAR(tty)) { 852 buf[5] = 4; 853 dev_dbg(&port->dev, "parity = space\n"); 854 } else { 855 buf[5] = 2; 856 dev_dbg(&port->dev, "parity = even\n"); 857 } 858 } 859 } else { 860 buf[5] = 0; 861 dev_dbg(&port->dev, "parity = none\n"); 862 } 863 864 /* 865 * Some PL2303 are known to lose bytes if you change serial settings 866 * even to the same values as before. Thus we actually need to filter 867 * in this specific case. 868 * 869 * Note that the tty_termios_hw_change check above is not sufficient 870 * as a previously requested baud rate may differ from the one 871 * actually used (and stored in old_termios). 872 * 873 * NOTE: No additional locking needed for line_settings as it is 874 * only used in set_termios, which is serialised against itself. 875 */ 876 if (!old_termios || memcmp(buf, priv->line_settings, 7)) { 877 ret = pl2303_set_line_request(port, buf); 878 if (!ret) 879 memcpy(priv->line_settings, buf, 7); 880 } 881 882 /* change control lines if we are switching to or from B0 */ 883 spin_lock_irqsave(&priv->lock, flags); 884 control = priv->line_control; 885 if (C_BAUD(tty) == B0) 886 priv->line_control &= ~(CONTROL_DTR | CONTROL_RTS); 887 else if (old_termios && (old_termios->c_cflag & CBAUD) == B0) 888 priv->line_control |= (CONTROL_DTR | CONTROL_RTS); 889 if (control != priv->line_control) { 890 control = priv->line_control; 891 spin_unlock_irqrestore(&priv->lock, flags); 892 pl2303_set_control_lines(port, control); 893 } else { 894 spin_unlock_irqrestore(&priv->lock, flags); 895 } 896 897 if (C_CRTSCTS(tty)) { 898 if (spriv->quirks & PL2303_QUIRK_LEGACY) { 899 pl2303_update_reg(serial, 0, PL2303_FLOWCTRL_MASK, 0x40); 900 } else if (spriv->type == &pl2303_type_data[TYPE_HXN]) { 901 pl2303_update_reg(serial, PL2303_HXN_FLOWCTRL_REG, 902 PL2303_HXN_FLOWCTRL_MASK, 903 PL2303_HXN_FLOWCTRL_RTS_CTS); 904 } else { 905 pl2303_update_reg(serial, 0, PL2303_FLOWCTRL_MASK, 0x60); 906 } 907 } else if (pl2303_enable_xonxoff(tty, spriv->type)) { 908 if (spriv->type == &pl2303_type_data[TYPE_HXN]) { 909 pl2303_update_reg(serial, PL2303_HXN_FLOWCTRL_REG, 910 PL2303_HXN_FLOWCTRL_MASK, 911 PL2303_HXN_FLOWCTRL_XON_XOFF); 912 } else { 913 pl2303_update_reg(serial, 0, PL2303_FLOWCTRL_MASK, 0xc0); 914 } 915 } else { 916 if (spriv->type == &pl2303_type_data[TYPE_HXN]) { 917 pl2303_update_reg(serial, PL2303_HXN_FLOWCTRL_REG, 918 PL2303_HXN_FLOWCTRL_MASK, 919 PL2303_HXN_FLOWCTRL_NONE); 920 } else { 921 pl2303_update_reg(serial, 0, PL2303_FLOWCTRL_MASK, 0); 922 } 923 } 924 925 kfree(buf); 926 } 927 928 static void pl2303_dtr_rts(struct usb_serial_port *port, int on) 929 { 930 struct pl2303_private *priv = usb_get_serial_port_data(port); 931 unsigned long flags; 932 u8 control; 933 934 spin_lock_irqsave(&priv->lock, flags); 935 if (on) 936 priv->line_control |= (CONTROL_DTR | CONTROL_RTS); 937 else 938 priv->line_control &= ~(CONTROL_DTR | CONTROL_RTS); 939 control = priv->line_control; 940 spin_unlock_irqrestore(&priv->lock, flags); 941 942 pl2303_set_control_lines(port, control); 943 } 944 945 static void pl2303_close(struct usb_serial_port *port) 946 { 947 usb_serial_generic_close(port); 948 usb_kill_urb(port->interrupt_in_urb); 949 pl2303_set_break(port, false); 950 } 951 952 static int pl2303_open(struct tty_struct *tty, struct usb_serial_port *port) 953 { 954 struct usb_serial *serial = port->serial; 955 struct pl2303_serial_private *spriv = usb_get_serial_data(serial); 956 int result; 957 958 if (spriv->quirks & PL2303_QUIRK_LEGACY) { 959 usb_clear_halt(serial->dev, port->write_urb->pipe); 960 usb_clear_halt(serial->dev, port->read_urb->pipe); 961 } else { 962 /* reset upstream data pipes */ 963 if (spriv->type == &pl2303_type_data[TYPE_HXN]) { 964 pl2303_vendor_write(serial, PL2303_HXN_RESET_REG, 965 PL2303_HXN_RESET_UPSTREAM_PIPE | 966 PL2303_HXN_RESET_DOWNSTREAM_PIPE); 967 } else { 968 pl2303_vendor_write(serial, 8, 0); 969 pl2303_vendor_write(serial, 9, 0); 970 } 971 } 972 973 /* Setup termios */ 974 if (tty) 975 pl2303_set_termios(tty, port, NULL); 976 977 result = usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL); 978 if (result) { 979 dev_err(&port->dev, "failed to submit interrupt urb: %d\n", 980 result); 981 return result; 982 } 983 984 result = usb_serial_generic_open(tty, port); 985 if (result) { 986 usb_kill_urb(port->interrupt_in_urb); 987 return result; 988 } 989 990 return 0; 991 } 992 993 static int pl2303_tiocmset(struct tty_struct *tty, 994 unsigned int set, unsigned int clear) 995 { 996 struct usb_serial_port *port = tty->driver_data; 997 struct pl2303_private *priv = usb_get_serial_port_data(port); 998 unsigned long flags; 999 u8 control; 1000 int ret; 1001 1002 spin_lock_irqsave(&priv->lock, flags); 1003 if (set & TIOCM_RTS) 1004 priv->line_control |= CONTROL_RTS; 1005 if (set & TIOCM_DTR) 1006 priv->line_control |= CONTROL_DTR; 1007 if (clear & TIOCM_RTS) 1008 priv->line_control &= ~CONTROL_RTS; 1009 if (clear & TIOCM_DTR) 1010 priv->line_control &= ~CONTROL_DTR; 1011 control = priv->line_control; 1012 spin_unlock_irqrestore(&priv->lock, flags); 1013 1014 ret = pl2303_set_control_lines(port, control); 1015 if (ret) 1016 return usb_translate_errors(ret); 1017 1018 return 0; 1019 } 1020 1021 static int pl2303_tiocmget(struct tty_struct *tty) 1022 { 1023 struct usb_serial_port *port = tty->driver_data; 1024 struct pl2303_private *priv = usb_get_serial_port_data(port); 1025 unsigned long flags; 1026 unsigned int mcr; 1027 unsigned int status; 1028 unsigned int result; 1029 1030 spin_lock_irqsave(&priv->lock, flags); 1031 mcr = priv->line_control; 1032 status = priv->line_status; 1033 spin_unlock_irqrestore(&priv->lock, flags); 1034 1035 result = ((mcr & CONTROL_DTR) ? TIOCM_DTR : 0) 1036 | ((mcr & CONTROL_RTS) ? TIOCM_RTS : 0) 1037 | ((status & UART_CTS) ? TIOCM_CTS : 0) 1038 | ((status & UART_DSR) ? TIOCM_DSR : 0) 1039 | ((status & UART_RING) ? TIOCM_RI : 0) 1040 | ((status & UART_DCD) ? TIOCM_CD : 0); 1041 1042 dev_dbg(&port->dev, "%s - result = %x\n", __func__, result); 1043 1044 return result; 1045 } 1046 1047 static int pl2303_carrier_raised(struct usb_serial_port *port) 1048 { 1049 struct pl2303_private *priv = usb_get_serial_port_data(port); 1050 1051 if (priv->line_status & UART_DCD) 1052 return 1; 1053 1054 return 0; 1055 } 1056 1057 static void pl2303_set_break(struct usb_serial_port *port, bool enable) 1058 { 1059 struct usb_serial *serial = port->serial; 1060 u16 state; 1061 int result; 1062 1063 if (enable) 1064 state = BREAK_ON; 1065 else 1066 state = BREAK_OFF; 1067 1068 dev_dbg(&port->dev, "%s - turning break %s\n", __func__, 1069 state == BREAK_OFF ? "off" : "on"); 1070 1071 result = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), 1072 BREAK_REQUEST, BREAK_REQUEST_TYPE, state, 1073 0, NULL, 0, 100); 1074 if (result) 1075 dev_err(&port->dev, "error sending break = %d\n", result); 1076 } 1077 1078 static void pl2303_break_ctl(struct tty_struct *tty, int state) 1079 { 1080 struct usb_serial_port *port = tty->driver_data; 1081 1082 pl2303_set_break(port, state); 1083 } 1084 1085 static void pl2303_update_line_status(struct usb_serial_port *port, 1086 unsigned char *data, 1087 unsigned int actual_length) 1088 { 1089 struct usb_serial *serial = port->serial; 1090 struct pl2303_serial_private *spriv = usb_get_serial_data(serial); 1091 struct pl2303_private *priv = usb_get_serial_port_data(port); 1092 struct tty_struct *tty; 1093 unsigned long flags; 1094 unsigned int status_idx = UART_STATE_INDEX; 1095 u8 status; 1096 u8 delta; 1097 1098 if (spriv->quirks & PL2303_QUIRK_UART_STATE_IDX0) 1099 status_idx = 0; 1100 1101 if (actual_length < status_idx + 1) 1102 return; 1103 1104 status = data[status_idx]; 1105 1106 /* Save off the uart status for others to look at */ 1107 spin_lock_irqsave(&priv->lock, flags); 1108 delta = priv->line_status ^ status; 1109 priv->line_status = status; 1110 spin_unlock_irqrestore(&priv->lock, flags); 1111 1112 if (status & UART_BREAK_ERROR) 1113 usb_serial_handle_break(port); 1114 1115 if (delta & UART_STATE_MSR_MASK) { 1116 if (delta & UART_CTS) 1117 port->icount.cts++; 1118 if (delta & UART_DSR) 1119 port->icount.dsr++; 1120 if (delta & UART_RING) 1121 port->icount.rng++; 1122 if (delta & UART_DCD) { 1123 port->icount.dcd++; 1124 tty = tty_port_tty_get(&port->port); 1125 if (tty) { 1126 usb_serial_handle_dcd_change(port, tty, 1127 status & UART_DCD); 1128 tty_kref_put(tty); 1129 } 1130 } 1131 1132 wake_up_interruptible(&port->port.delta_msr_wait); 1133 } 1134 } 1135 1136 static void pl2303_read_int_callback(struct urb *urb) 1137 { 1138 struct usb_serial_port *port = urb->context; 1139 unsigned char *data = urb->transfer_buffer; 1140 unsigned int actual_length = urb->actual_length; 1141 int status = urb->status; 1142 int retval; 1143 1144 switch (status) { 1145 case 0: 1146 /* success */ 1147 break; 1148 case -ECONNRESET: 1149 case -ENOENT: 1150 case -ESHUTDOWN: 1151 /* this urb is terminated, clean up */ 1152 dev_dbg(&port->dev, "%s - urb shutting down with status: %d\n", 1153 __func__, status); 1154 return; 1155 default: 1156 dev_dbg(&port->dev, "%s - nonzero urb status received: %d\n", 1157 __func__, status); 1158 goto exit; 1159 } 1160 1161 usb_serial_debug_data(&port->dev, __func__, 1162 urb->actual_length, urb->transfer_buffer); 1163 1164 pl2303_update_line_status(port, data, actual_length); 1165 1166 exit: 1167 retval = usb_submit_urb(urb, GFP_ATOMIC); 1168 if (retval) { 1169 dev_err(&port->dev, 1170 "%s - usb_submit_urb failed with result %d\n", 1171 __func__, retval); 1172 } 1173 } 1174 1175 static void pl2303_process_read_urb(struct urb *urb) 1176 { 1177 struct usb_serial_port *port = urb->context; 1178 struct pl2303_private *priv = usb_get_serial_port_data(port); 1179 unsigned char *data = urb->transfer_buffer; 1180 char tty_flag = TTY_NORMAL; 1181 unsigned long flags; 1182 u8 line_status; 1183 int i; 1184 1185 /* update line status */ 1186 spin_lock_irqsave(&priv->lock, flags); 1187 line_status = priv->line_status; 1188 priv->line_status &= ~UART_STATE_TRANSIENT_MASK; 1189 spin_unlock_irqrestore(&priv->lock, flags); 1190 1191 if (!urb->actual_length) 1192 return; 1193 1194 /* 1195 * Break takes precedence over parity, which takes precedence over 1196 * framing errors. 1197 */ 1198 if (line_status & UART_BREAK_ERROR) 1199 tty_flag = TTY_BREAK; 1200 else if (line_status & UART_PARITY_ERROR) 1201 tty_flag = TTY_PARITY; 1202 else if (line_status & UART_FRAME_ERROR) 1203 tty_flag = TTY_FRAME; 1204 1205 if (tty_flag != TTY_NORMAL) 1206 dev_dbg(&port->dev, "%s - tty_flag = %d\n", __func__, 1207 tty_flag); 1208 /* overrun is special, not associated with a char */ 1209 if (line_status & UART_OVERRUN_ERROR) 1210 tty_insert_flip_char(&port->port, 0, TTY_OVERRUN); 1211 1212 if (port->sysrq) { 1213 for (i = 0; i < urb->actual_length; ++i) 1214 if (!usb_serial_handle_sysrq_char(port, data[i])) 1215 tty_insert_flip_char(&port->port, data[i], 1216 tty_flag); 1217 } else { 1218 tty_insert_flip_string_fixed_flag(&port->port, data, tty_flag, 1219 urb->actual_length); 1220 } 1221 1222 tty_flip_buffer_push(&port->port); 1223 } 1224 1225 static struct usb_serial_driver pl2303_device = { 1226 .driver = { 1227 .owner = THIS_MODULE, 1228 .name = "pl2303", 1229 }, 1230 .id_table = id_table, 1231 .num_bulk_in = 1, 1232 .num_bulk_out = 1, 1233 .num_interrupt_in = 0, /* see pl2303_calc_num_ports */ 1234 .bulk_in_size = 256, 1235 .bulk_out_size = 256, 1236 .open = pl2303_open, 1237 .close = pl2303_close, 1238 .dtr_rts = pl2303_dtr_rts, 1239 .carrier_raised = pl2303_carrier_raised, 1240 .break_ctl = pl2303_break_ctl, 1241 .set_termios = pl2303_set_termios, 1242 .tiocmget = pl2303_tiocmget, 1243 .tiocmset = pl2303_tiocmset, 1244 .tiocmiwait = usb_serial_generic_tiocmiwait, 1245 .process_read_urb = pl2303_process_read_urb, 1246 .read_int_callback = pl2303_read_int_callback, 1247 .probe = pl2303_probe, 1248 .calc_num_ports = pl2303_calc_num_ports, 1249 .attach = pl2303_startup, 1250 .release = pl2303_release, 1251 .port_probe = pl2303_port_probe, 1252 .port_remove = pl2303_port_remove, 1253 }; 1254 1255 static struct usb_serial_driver * const serial_drivers[] = { 1256 &pl2303_device, NULL 1257 }; 1258 1259 module_usb_serial_driver(serial_drivers, id_table); 1260 1261 MODULE_DESCRIPTION("Prolific PL2303 USB to serial adaptor driver"); 1262 MODULE_LICENSE("GPL v2"); 1263