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 { USB_DEVICE(MACROSILICON_VENDOR_ID, MACROSILICON_MS3020_PRODUCT_ID) }, 122 { } /* Terminating entry */ 123 }; 124 125 MODULE_DEVICE_TABLE(usb, id_table); 126 127 #define SET_LINE_REQUEST_TYPE 0x21 128 #define SET_LINE_REQUEST 0x20 129 130 #define SET_CONTROL_REQUEST_TYPE 0x21 131 #define SET_CONTROL_REQUEST 0x22 132 #define CONTROL_DTR 0x01 133 #define CONTROL_RTS 0x02 134 135 #define BREAK_REQUEST_TYPE 0x21 136 #define BREAK_REQUEST 0x23 137 #define BREAK_ON 0xffff 138 #define BREAK_OFF 0x0000 139 140 #define GET_LINE_REQUEST_TYPE 0xa1 141 #define GET_LINE_REQUEST 0x21 142 143 #define VENDOR_WRITE_REQUEST_TYPE 0x40 144 #define VENDOR_WRITE_REQUEST 0x01 145 #define VENDOR_WRITE_NREQUEST 0x80 146 147 #define VENDOR_READ_REQUEST_TYPE 0xc0 148 #define VENDOR_READ_REQUEST 0x01 149 #define VENDOR_READ_NREQUEST 0x81 150 151 #define UART_STATE_INDEX 8 152 #define UART_STATE_MSR_MASK 0x8b 153 #define UART_STATE_TRANSIENT_MASK 0x74 154 #define UART_DCD 0x01 155 #define UART_DSR 0x02 156 #define UART_BREAK_ERROR 0x04 157 #define UART_RING 0x08 158 #define UART_FRAME_ERROR 0x10 159 #define UART_PARITY_ERROR 0x20 160 #define UART_OVERRUN_ERROR 0x40 161 #define UART_CTS 0x80 162 163 #define PL2303_FLOWCTRL_MASK 0xf0 164 165 #define PL2303_READ_TYPE_HX_STATUS 0x8080 166 167 #define PL2303_HXN_RESET_REG 0x07 168 #define PL2303_HXN_RESET_UPSTREAM_PIPE 0x02 169 #define PL2303_HXN_RESET_DOWNSTREAM_PIPE 0x01 170 171 #define PL2303_HXN_FLOWCTRL_REG 0x0a 172 #define PL2303_HXN_FLOWCTRL_MASK 0x1c 173 #define PL2303_HXN_FLOWCTRL_NONE 0x1c 174 #define PL2303_HXN_FLOWCTRL_RTS_CTS 0x18 175 #define PL2303_HXN_FLOWCTRL_XON_XOFF 0x0c 176 177 static int pl2303_set_break(struct usb_serial_port *port, bool enable); 178 179 enum pl2303_type { 180 TYPE_H, 181 TYPE_HX, 182 TYPE_TA, 183 TYPE_TB, 184 TYPE_HXD, 185 TYPE_HXN, 186 TYPE_COUNT 187 }; 188 189 struct pl2303_type_data { 190 const char *name; 191 speed_t max_baud_rate; 192 unsigned long quirks; 193 unsigned int no_autoxonxoff:1; 194 unsigned int no_divisors:1; 195 unsigned int alt_divisors:1; 196 }; 197 198 struct pl2303_serial_private { 199 const struct pl2303_type_data *type; 200 unsigned long quirks; 201 }; 202 203 struct pl2303_private { 204 spinlock_t lock; 205 u8 line_control; 206 u8 line_status; 207 208 u8 line_settings[7]; 209 }; 210 211 static const struct pl2303_type_data pl2303_type_data[TYPE_COUNT] = { 212 [TYPE_H] = { 213 .name = "H", 214 .max_baud_rate = 1228800, 215 .quirks = PL2303_QUIRK_LEGACY, 216 .no_autoxonxoff = true, 217 }, 218 [TYPE_HX] = { 219 .name = "HX", 220 .max_baud_rate = 6000000, 221 }, 222 [TYPE_TA] = { 223 .name = "TA", 224 .max_baud_rate = 6000000, 225 .alt_divisors = true, 226 }, 227 [TYPE_TB] = { 228 .name = "TB", 229 .max_baud_rate = 12000000, 230 .alt_divisors = true, 231 }, 232 [TYPE_HXD] = { 233 .name = "HXD", 234 .max_baud_rate = 12000000, 235 }, 236 [TYPE_HXN] = { 237 .name = "G", 238 .max_baud_rate = 12000000, 239 .no_divisors = true, 240 }, 241 }; 242 243 static int pl2303_vendor_read(struct usb_serial *serial, u16 value, 244 unsigned char buf[1]) 245 { 246 struct pl2303_serial_private *spriv = usb_get_serial_data(serial); 247 struct device *dev = &serial->interface->dev; 248 u8 request; 249 int res; 250 251 if (spriv->type == &pl2303_type_data[TYPE_HXN]) 252 request = VENDOR_READ_NREQUEST; 253 else 254 request = VENDOR_READ_REQUEST; 255 256 res = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0), 257 request, VENDOR_READ_REQUEST_TYPE, 258 value, 0, buf, 1, 100); 259 if (res != 1) { 260 dev_err(dev, "%s - failed to read [%04x]: %d\n", __func__, 261 value, res); 262 if (res >= 0) 263 res = -EIO; 264 265 return res; 266 } 267 268 dev_dbg(dev, "%s - [%04x] = %02x\n", __func__, value, buf[0]); 269 270 return 0; 271 } 272 273 static int pl2303_vendor_write(struct usb_serial *serial, u16 value, u16 index) 274 { 275 struct pl2303_serial_private *spriv = usb_get_serial_data(serial); 276 struct device *dev = &serial->interface->dev; 277 u8 request; 278 int res; 279 280 dev_dbg(dev, "%s - [%04x] = %02x\n", __func__, value, index); 281 282 if (spriv->type == &pl2303_type_data[TYPE_HXN]) 283 request = VENDOR_WRITE_NREQUEST; 284 else 285 request = VENDOR_WRITE_REQUEST; 286 287 res = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), 288 request, VENDOR_WRITE_REQUEST_TYPE, 289 value, index, NULL, 0, 100); 290 if (res) { 291 dev_err(dev, "%s - failed to write [%04x]: %d\n", __func__, 292 value, res); 293 return res; 294 } 295 296 return 0; 297 } 298 299 static int pl2303_update_reg(struct usb_serial *serial, u8 reg, u8 mask, u8 val) 300 { 301 struct pl2303_serial_private *spriv = usb_get_serial_data(serial); 302 int ret = 0; 303 u8 *buf; 304 305 buf = kmalloc(1, GFP_KERNEL); 306 if (!buf) 307 return -ENOMEM; 308 309 if (spriv->type == &pl2303_type_data[TYPE_HXN]) 310 ret = pl2303_vendor_read(serial, reg, buf); 311 else 312 ret = pl2303_vendor_read(serial, reg | 0x80, buf); 313 314 if (ret) 315 goto out_free; 316 317 *buf &= ~mask; 318 *buf |= val & mask; 319 320 ret = pl2303_vendor_write(serial, reg, *buf); 321 out_free: 322 kfree(buf); 323 324 return ret; 325 } 326 327 static int pl2303_probe(struct usb_serial *serial, 328 const struct usb_device_id *id) 329 { 330 usb_set_serial_data(serial, (void *)id->driver_info); 331 332 return 0; 333 } 334 335 /* 336 * Use interrupt endpoint from first interface if available. 337 * 338 * This is needed due to the looney way its endpoints are set up. 339 */ 340 static int pl2303_endpoint_hack(struct usb_serial *serial, 341 struct usb_serial_endpoints *epds) 342 { 343 struct usb_interface *interface = serial->interface; 344 struct usb_device *dev = serial->dev; 345 struct device *ddev = &interface->dev; 346 struct usb_host_interface *iface_desc; 347 struct usb_endpoint_descriptor *endpoint; 348 unsigned int i; 349 350 if (interface == dev->actconfig->interface[0]) 351 return 0; 352 353 /* check out the endpoints of the other interface */ 354 iface_desc = dev->actconfig->interface[0]->cur_altsetting; 355 356 for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) { 357 endpoint = &iface_desc->endpoint[i].desc; 358 359 if (!usb_endpoint_is_int_in(endpoint)) 360 continue; 361 362 dev_dbg(ddev, "found interrupt in on separate interface\n"); 363 if (epds->num_interrupt_in < ARRAY_SIZE(epds->interrupt_in)) 364 epds->interrupt_in[epds->num_interrupt_in++] = endpoint; 365 } 366 367 return 0; 368 } 369 370 static int pl2303_calc_num_ports(struct usb_serial *serial, 371 struct usb_serial_endpoints *epds) 372 { 373 unsigned long quirks = (unsigned long)usb_get_serial_data(serial); 374 struct device *dev = &serial->interface->dev; 375 int ret; 376 377 if (quirks & PL2303_QUIRK_ENDPOINT_HACK) { 378 ret = pl2303_endpoint_hack(serial, epds); 379 if (ret) 380 return ret; 381 } 382 383 if (epds->num_interrupt_in < 1) { 384 dev_err(dev, "required interrupt-in endpoint missing\n"); 385 return -ENODEV; 386 } 387 388 return 1; 389 } 390 391 static bool pl2303_supports_hx_status(struct usb_serial *serial) 392 { 393 int ret; 394 u8 buf; 395 396 ret = usb_control_msg_recv(serial->dev, 0, VENDOR_READ_REQUEST, 397 VENDOR_READ_REQUEST_TYPE, PL2303_READ_TYPE_HX_STATUS, 398 0, &buf, 1, 100, GFP_KERNEL); 399 400 return ret == 0; 401 } 402 403 static int pl2303_detect_type(struct usb_serial *serial) 404 { 405 struct usb_device_descriptor *desc = &serial->dev->descriptor; 406 u16 bcdDevice, bcdUSB; 407 408 /* 409 * Legacy PL2303H, variants 0 and 1 (difference unknown). 410 */ 411 if (desc->bDeviceClass == 0x02) 412 return TYPE_H; /* variant 0 */ 413 414 if (desc->bMaxPacketSize0 != 0x40) { 415 if (desc->bDeviceClass == 0x00 || desc->bDeviceClass == 0xff) 416 return TYPE_H; /* variant 1 */ 417 418 return TYPE_H; /* variant 0 */ 419 } 420 421 bcdDevice = le16_to_cpu(desc->bcdDevice); 422 bcdUSB = le16_to_cpu(desc->bcdUSB); 423 424 switch (bcdUSB) { 425 case 0x101: 426 /* USB 1.0.1? Let's assume they meant 1.1... */ 427 fallthrough; 428 case 0x110: 429 switch (bcdDevice) { 430 case 0x300: 431 return TYPE_HX; 432 case 0x400: 433 return TYPE_HXD; 434 default: 435 return TYPE_HX; 436 } 437 break; 438 case 0x200: 439 switch (bcdDevice) { 440 case 0x100: /* GC */ 441 case 0x105: 442 return TYPE_HXN; 443 case 0x300: /* GT / TA */ 444 if (pl2303_supports_hx_status(serial)) 445 return TYPE_TA; 446 fallthrough; 447 case 0x305: 448 case 0x400: /* GL */ 449 case 0x405: 450 return TYPE_HXN; 451 case 0x500: /* GE / TB */ 452 if (pl2303_supports_hx_status(serial)) 453 return TYPE_TB; 454 fallthrough; 455 case 0x505: 456 case 0x600: /* GS */ 457 case 0x605: 458 case 0x700: /* GR */ 459 case 0x705: 460 return TYPE_HXN; 461 } 462 break; 463 } 464 465 dev_err(&serial->interface->dev, 466 "unknown device type, please report to linux-usb@vger.kernel.org\n"); 467 return -ENODEV; 468 } 469 470 static int pl2303_startup(struct usb_serial *serial) 471 { 472 struct pl2303_serial_private *spriv; 473 enum pl2303_type type; 474 unsigned char *buf; 475 int ret; 476 477 ret = pl2303_detect_type(serial); 478 if (ret < 0) 479 return ret; 480 481 type = ret; 482 dev_dbg(&serial->interface->dev, "device type: %s\n", pl2303_type_data[type].name); 483 484 spriv = kzalloc(sizeof(*spriv), GFP_KERNEL); 485 if (!spriv) 486 return -ENOMEM; 487 488 spriv->type = &pl2303_type_data[type]; 489 spriv->quirks = (unsigned long)usb_get_serial_data(serial); 490 spriv->quirks |= spriv->type->quirks; 491 492 usb_set_serial_data(serial, spriv); 493 494 if (type != TYPE_HXN) { 495 buf = kmalloc(1, GFP_KERNEL); 496 if (!buf) { 497 kfree(spriv); 498 return -ENOMEM; 499 } 500 501 pl2303_vendor_read(serial, 0x8484, buf); 502 pl2303_vendor_write(serial, 0x0404, 0); 503 pl2303_vendor_read(serial, 0x8484, buf); 504 pl2303_vendor_read(serial, 0x8383, buf); 505 pl2303_vendor_read(serial, 0x8484, buf); 506 pl2303_vendor_write(serial, 0x0404, 1); 507 pl2303_vendor_read(serial, 0x8484, buf); 508 pl2303_vendor_read(serial, 0x8383, buf); 509 pl2303_vendor_write(serial, 0, 1); 510 pl2303_vendor_write(serial, 1, 0); 511 if (spriv->quirks & PL2303_QUIRK_LEGACY) 512 pl2303_vendor_write(serial, 2, 0x24); 513 else 514 pl2303_vendor_write(serial, 2, 0x44); 515 516 kfree(buf); 517 } 518 519 return 0; 520 } 521 522 static void pl2303_release(struct usb_serial *serial) 523 { 524 struct pl2303_serial_private *spriv = usb_get_serial_data(serial); 525 526 kfree(spriv); 527 } 528 529 static int pl2303_port_probe(struct usb_serial_port *port) 530 { 531 struct pl2303_private *priv; 532 533 priv = kzalloc(sizeof(*priv), GFP_KERNEL); 534 if (!priv) 535 return -ENOMEM; 536 537 spin_lock_init(&priv->lock); 538 539 usb_set_serial_port_data(port, priv); 540 541 port->port.drain_delay = 256; 542 543 return 0; 544 } 545 546 static void pl2303_port_remove(struct usb_serial_port *port) 547 { 548 struct pl2303_private *priv = usb_get_serial_port_data(port); 549 550 kfree(priv); 551 } 552 553 static int pl2303_set_control_lines(struct usb_serial_port *port, u8 value) 554 { 555 struct usb_device *dev = port->serial->dev; 556 int retval; 557 558 dev_dbg(&port->dev, "%s - %02x\n", __func__, value); 559 560 retval = usb_control_msg(dev, usb_sndctrlpipe(dev, 0), 561 SET_CONTROL_REQUEST, SET_CONTROL_REQUEST_TYPE, 562 value, 0, NULL, 0, 100); 563 if (retval) 564 dev_err(&port->dev, "%s - failed: %d\n", __func__, retval); 565 566 return retval; 567 } 568 569 /* 570 * Returns the nearest supported baud rate that can be set directly without 571 * using divisors. 572 */ 573 static speed_t pl2303_get_supported_baud_rate(speed_t baud) 574 { 575 static const speed_t baud_sup[] = { 576 75, 150, 300, 600, 1200, 1800, 2400, 3600, 4800, 7200, 9600, 577 14400, 19200, 28800, 38400, 57600, 115200, 230400, 460800, 578 614400, 921600, 1228800, 2457600, 3000000, 6000000 579 }; 580 581 unsigned i; 582 583 for (i = 0; i < ARRAY_SIZE(baud_sup); ++i) { 584 if (baud_sup[i] > baud) 585 break; 586 } 587 588 if (i == ARRAY_SIZE(baud_sup)) 589 baud = baud_sup[i - 1]; 590 else if (i > 0 && (baud_sup[i] - baud) > (baud - baud_sup[i - 1])) 591 baud = baud_sup[i - 1]; 592 else 593 baud = baud_sup[i]; 594 595 return baud; 596 } 597 598 /* 599 * NOTE: If unsupported baud rates are set directly, the PL2303 seems to 600 * use 9600 baud. 601 */ 602 static speed_t pl2303_encode_baud_rate_direct(unsigned char buf[4], 603 speed_t baud) 604 { 605 put_unaligned_le32(baud, buf); 606 607 return baud; 608 } 609 610 static speed_t pl2303_encode_baud_rate_divisor(unsigned char buf[4], 611 speed_t baud) 612 { 613 unsigned int baseline, mantissa, exponent; 614 615 /* 616 * Apparently the formula is: 617 * baudrate = 12M * 32 / (mantissa * 4^exponent) 618 * where 619 * mantissa = buf[8:0] 620 * exponent = buf[11:9] 621 */ 622 baseline = 12000000 * 32; 623 mantissa = baseline / baud; 624 if (mantissa == 0) 625 mantissa = 1; /* Avoid dividing by zero if baud > 32*12M. */ 626 exponent = 0; 627 while (mantissa >= 512) { 628 if (exponent < 7) { 629 mantissa >>= 2; /* divide by 4 */ 630 exponent++; 631 } else { 632 /* Exponent is maxed. Trim mantissa and leave. */ 633 mantissa = 511; 634 break; 635 } 636 } 637 638 buf[3] = 0x80; 639 buf[2] = 0; 640 buf[1] = exponent << 1 | mantissa >> 8; 641 buf[0] = mantissa & 0xff; 642 643 /* Calculate and return the exact baud rate. */ 644 baud = (baseline / mantissa) >> (exponent << 1); 645 646 return baud; 647 } 648 649 static speed_t pl2303_encode_baud_rate_divisor_alt(unsigned char buf[4], 650 speed_t baud) 651 { 652 unsigned int baseline, mantissa, exponent; 653 654 /* 655 * Apparently, for the TA version the formula is: 656 * baudrate = 12M * 32 / (mantissa * 2^exponent) 657 * where 658 * mantissa = buf[10:0] 659 * exponent = buf[15:13 16] 660 */ 661 baseline = 12000000 * 32; 662 mantissa = baseline / baud; 663 if (mantissa == 0) 664 mantissa = 1; /* Avoid dividing by zero if baud > 32*12M. */ 665 exponent = 0; 666 while (mantissa >= 2048) { 667 if (exponent < 15) { 668 mantissa >>= 1; /* divide by 2 */ 669 exponent++; 670 } else { 671 /* Exponent is maxed. Trim mantissa and leave. */ 672 mantissa = 2047; 673 break; 674 } 675 } 676 677 buf[3] = 0x80; 678 buf[2] = exponent & 0x01; 679 buf[1] = (exponent & ~0x01) << 4 | mantissa >> 8; 680 buf[0] = mantissa & 0xff; 681 682 /* Calculate and return the exact baud rate. */ 683 baud = (baseline / mantissa) >> exponent; 684 685 return baud; 686 } 687 688 static void pl2303_encode_baud_rate(struct tty_struct *tty, 689 struct usb_serial_port *port, 690 u8 buf[4]) 691 { 692 struct usb_serial *serial = port->serial; 693 struct pl2303_serial_private *spriv = usb_get_serial_data(serial); 694 speed_t baud_sup; 695 speed_t baud; 696 697 baud = tty_get_baud_rate(tty); 698 dev_dbg(&port->dev, "baud requested = %u\n", baud); 699 if (!baud) 700 return; 701 702 if (spriv->type->max_baud_rate) 703 baud = min_t(speed_t, baud, spriv->type->max_baud_rate); 704 /* 705 * Use direct method for supported baud rates, otherwise use divisors. 706 * Newer chip types do not support divisor encoding. 707 */ 708 if (spriv->type->no_divisors) 709 baud_sup = baud; 710 else 711 baud_sup = pl2303_get_supported_baud_rate(baud); 712 713 if (baud == baud_sup) 714 baud = pl2303_encode_baud_rate_direct(buf, baud); 715 else if (spriv->type->alt_divisors) 716 baud = pl2303_encode_baud_rate_divisor_alt(buf, baud); 717 else 718 baud = pl2303_encode_baud_rate_divisor(buf, baud); 719 720 /* Save resulting baud rate */ 721 tty_encode_baud_rate(tty, baud, baud); 722 dev_dbg(&port->dev, "baud set = %u\n", baud); 723 } 724 725 static int pl2303_get_line_request(struct usb_serial_port *port, 726 unsigned char buf[7]) 727 { 728 struct usb_device *udev = port->serial->dev; 729 int ret; 730 731 ret = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0), 732 GET_LINE_REQUEST, GET_LINE_REQUEST_TYPE, 733 0, 0, buf, 7, 100); 734 if (ret != 7) { 735 dev_err(&port->dev, "%s - failed: %d\n", __func__, ret); 736 737 if (ret >= 0) 738 ret = -EIO; 739 740 return ret; 741 } 742 743 dev_dbg(&port->dev, "%s - %7ph\n", __func__, buf); 744 745 return 0; 746 } 747 748 static int pl2303_set_line_request(struct usb_serial_port *port, 749 unsigned char buf[7]) 750 { 751 struct usb_device *udev = port->serial->dev; 752 int ret; 753 754 ret = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), 755 SET_LINE_REQUEST, SET_LINE_REQUEST_TYPE, 756 0, 0, buf, 7, 100); 757 if (ret < 0) { 758 dev_err(&port->dev, "%s - failed: %d\n", __func__, ret); 759 return ret; 760 } 761 762 dev_dbg(&port->dev, "%s - %7ph\n", __func__, buf); 763 764 return 0; 765 } 766 767 static bool pl2303_termios_change(const struct ktermios *a, const struct ktermios *b) 768 { 769 bool ixon_change; 770 771 ixon_change = ((a->c_iflag ^ b->c_iflag) & (IXON | IXANY)) || 772 a->c_cc[VSTART] != b->c_cc[VSTART] || 773 a->c_cc[VSTOP] != b->c_cc[VSTOP]; 774 775 return tty_termios_hw_change(a, b) || ixon_change; 776 } 777 778 static bool pl2303_enable_xonxoff(struct tty_struct *tty, const struct pl2303_type_data *type) 779 { 780 if (!I_IXON(tty) || I_IXANY(tty)) 781 return false; 782 783 if (START_CHAR(tty) != 0x11 || STOP_CHAR(tty) != 0x13) 784 return false; 785 786 if (type->no_autoxonxoff) 787 return false; 788 789 return true; 790 } 791 792 static void pl2303_set_termios(struct tty_struct *tty, 793 struct usb_serial_port *port, 794 const struct ktermios *old_termios) 795 { 796 struct usb_serial *serial = port->serial; 797 struct pl2303_serial_private *spriv = usb_get_serial_data(serial); 798 struct pl2303_private *priv = usb_get_serial_port_data(port); 799 unsigned long flags; 800 unsigned char *buf; 801 int ret; 802 u8 control; 803 804 if (old_termios && !pl2303_termios_change(&tty->termios, old_termios)) 805 return; 806 807 buf = kzalloc(7, GFP_KERNEL); 808 if (!buf) { 809 /* Report back no change occurred */ 810 if (old_termios) 811 tty->termios = *old_termios; 812 return; 813 } 814 815 pl2303_get_line_request(port, buf); 816 817 buf[6] = tty_get_char_size(tty->termios.c_cflag); 818 dev_dbg(&port->dev, "data bits = %d\n", buf[6]); 819 820 /* For reference buf[0]:buf[3] baud rate value */ 821 pl2303_encode_baud_rate(tty, port, &buf[0]); 822 823 /* For reference buf[4]=0 is 1 stop bits */ 824 /* For reference buf[4]=1 is 1.5 stop bits */ 825 /* For reference buf[4]=2 is 2 stop bits */ 826 if (C_CSTOPB(tty)) { 827 /* 828 * NOTE: Comply with "real" UARTs / RS232: 829 * use 1.5 instead of 2 stop bits with 5 data bits 830 */ 831 if (C_CSIZE(tty) == CS5) { 832 buf[4] = 1; 833 dev_dbg(&port->dev, "stop bits = 1.5\n"); 834 } else { 835 buf[4] = 2; 836 dev_dbg(&port->dev, "stop bits = 2\n"); 837 } 838 } else { 839 buf[4] = 0; 840 dev_dbg(&port->dev, "stop bits = 1\n"); 841 } 842 843 if (C_PARENB(tty)) { 844 /* For reference buf[5]=0 is none parity */ 845 /* For reference buf[5]=1 is odd parity */ 846 /* For reference buf[5]=2 is even parity */ 847 /* For reference buf[5]=3 is mark parity */ 848 /* For reference buf[5]=4 is space parity */ 849 if (C_PARODD(tty)) { 850 if (C_CMSPAR(tty)) { 851 buf[5] = 3; 852 dev_dbg(&port->dev, "parity = mark\n"); 853 } else { 854 buf[5] = 1; 855 dev_dbg(&port->dev, "parity = odd\n"); 856 } 857 } else { 858 if (C_CMSPAR(tty)) { 859 buf[5] = 4; 860 dev_dbg(&port->dev, "parity = space\n"); 861 } else { 862 buf[5] = 2; 863 dev_dbg(&port->dev, "parity = even\n"); 864 } 865 } 866 } else { 867 buf[5] = 0; 868 dev_dbg(&port->dev, "parity = none\n"); 869 } 870 871 /* 872 * Some PL2303 are known to lose bytes if you change serial settings 873 * even to the same values as before. Thus we actually need to filter 874 * in this specific case. 875 * 876 * Note that the tty_termios_hw_change check above is not sufficient 877 * as a previously requested baud rate may differ from the one 878 * actually used (and stored in old_termios). 879 * 880 * NOTE: No additional locking needed for line_settings as it is 881 * only used in set_termios, which is serialised against itself. 882 */ 883 if (!old_termios || memcmp(buf, priv->line_settings, 7)) { 884 ret = pl2303_set_line_request(port, buf); 885 if (!ret) 886 memcpy(priv->line_settings, buf, 7); 887 } 888 889 /* change control lines if we are switching to or from B0 */ 890 spin_lock_irqsave(&priv->lock, flags); 891 control = priv->line_control; 892 if (C_BAUD(tty) == B0) 893 priv->line_control &= ~(CONTROL_DTR | CONTROL_RTS); 894 else if (old_termios && (old_termios->c_cflag & CBAUD) == B0) 895 priv->line_control |= (CONTROL_DTR | CONTROL_RTS); 896 if (control != priv->line_control) { 897 control = priv->line_control; 898 spin_unlock_irqrestore(&priv->lock, flags); 899 pl2303_set_control_lines(port, control); 900 } else { 901 spin_unlock_irqrestore(&priv->lock, flags); 902 } 903 904 if (C_CRTSCTS(tty)) { 905 if (spriv->quirks & PL2303_QUIRK_LEGACY) { 906 pl2303_update_reg(serial, 0, PL2303_FLOWCTRL_MASK, 0x40); 907 } else if (spriv->type == &pl2303_type_data[TYPE_HXN]) { 908 pl2303_update_reg(serial, PL2303_HXN_FLOWCTRL_REG, 909 PL2303_HXN_FLOWCTRL_MASK, 910 PL2303_HXN_FLOWCTRL_RTS_CTS); 911 } else { 912 pl2303_update_reg(serial, 0, PL2303_FLOWCTRL_MASK, 0x60); 913 } 914 } else if (pl2303_enable_xonxoff(tty, spriv->type)) { 915 if (spriv->type == &pl2303_type_data[TYPE_HXN]) { 916 pl2303_update_reg(serial, PL2303_HXN_FLOWCTRL_REG, 917 PL2303_HXN_FLOWCTRL_MASK, 918 PL2303_HXN_FLOWCTRL_XON_XOFF); 919 } else { 920 pl2303_update_reg(serial, 0, PL2303_FLOWCTRL_MASK, 0xc0); 921 } 922 } else { 923 if (spriv->type == &pl2303_type_data[TYPE_HXN]) { 924 pl2303_update_reg(serial, PL2303_HXN_FLOWCTRL_REG, 925 PL2303_HXN_FLOWCTRL_MASK, 926 PL2303_HXN_FLOWCTRL_NONE); 927 } else { 928 pl2303_update_reg(serial, 0, PL2303_FLOWCTRL_MASK, 0); 929 } 930 } 931 932 kfree(buf); 933 } 934 935 static void pl2303_dtr_rts(struct usb_serial_port *port, int on) 936 { 937 struct pl2303_private *priv = usb_get_serial_port_data(port); 938 unsigned long flags; 939 u8 control; 940 941 spin_lock_irqsave(&priv->lock, flags); 942 if (on) 943 priv->line_control |= (CONTROL_DTR | CONTROL_RTS); 944 else 945 priv->line_control &= ~(CONTROL_DTR | CONTROL_RTS); 946 control = priv->line_control; 947 spin_unlock_irqrestore(&priv->lock, flags); 948 949 pl2303_set_control_lines(port, control); 950 } 951 952 static void pl2303_close(struct usb_serial_port *port) 953 { 954 usb_serial_generic_close(port); 955 usb_kill_urb(port->interrupt_in_urb); 956 pl2303_set_break(port, false); 957 } 958 959 static int pl2303_open(struct tty_struct *tty, struct usb_serial_port *port) 960 { 961 struct usb_serial *serial = port->serial; 962 struct pl2303_serial_private *spriv = usb_get_serial_data(serial); 963 int result; 964 965 if (spriv->quirks & PL2303_QUIRK_LEGACY) { 966 usb_clear_halt(serial->dev, port->write_urb->pipe); 967 usb_clear_halt(serial->dev, port->read_urb->pipe); 968 } else { 969 /* reset upstream data pipes */ 970 if (spriv->type == &pl2303_type_data[TYPE_HXN]) { 971 pl2303_vendor_write(serial, PL2303_HXN_RESET_REG, 972 PL2303_HXN_RESET_UPSTREAM_PIPE | 973 PL2303_HXN_RESET_DOWNSTREAM_PIPE); 974 } else { 975 pl2303_vendor_write(serial, 8, 0); 976 pl2303_vendor_write(serial, 9, 0); 977 } 978 } 979 980 /* Setup termios */ 981 if (tty) 982 pl2303_set_termios(tty, port, NULL); 983 984 result = usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL); 985 if (result) { 986 dev_err(&port->dev, "failed to submit interrupt urb: %d\n", 987 result); 988 return result; 989 } 990 991 result = usb_serial_generic_open(tty, port); 992 if (result) { 993 usb_kill_urb(port->interrupt_in_urb); 994 return result; 995 } 996 997 return 0; 998 } 999 1000 static int pl2303_tiocmset(struct tty_struct *tty, 1001 unsigned int set, unsigned int clear) 1002 { 1003 struct usb_serial_port *port = tty->driver_data; 1004 struct pl2303_private *priv = usb_get_serial_port_data(port); 1005 unsigned long flags; 1006 u8 control; 1007 int ret; 1008 1009 spin_lock_irqsave(&priv->lock, flags); 1010 if (set & TIOCM_RTS) 1011 priv->line_control |= CONTROL_RTS; 1012 if (set & TIOCM_DTR) 1013 priv->line_control |= CONTROL_DTR; 1014 if (clear & TIOCM_RTS) 1015 priv->line_control &= ~CONTROL_RTS; 1016 if (clear & TIOCM_DTR) 1017 priv->line_control &= ~CONTROL_DTR; 1018 control = priv->line_control; 1019 spin_unlock_irqrestore(&priv->lock, flags); 1020 1021 ret = pl2303_set_control_lines(port, control); 1022 if (ret) 1023 return usb_translate_errors(ret); 1024 1025 return 0; 1026 } 1027 1028 static int pl2303_tiocmget(struct tty_struct *tty) 1029 { 1030 struct usb_serial_port *port = tty->driver_data; 1031 struct pl2303_private *priv = usb_get_serial_port_data(port); 1032 unsigned long flags; 1033 unsigned int mcr; 1034 unsigned int status; 1035 unsigned int result; 1036 1037 spin_lock_irqsave(&priv->lock, flags); 1038 mcr = priv->line_control; 1039 status = priv->line_status; 1040 spin_unlock_irqrestore(&priv->lock, flags); 1041 1042 result = ((mcr & CONTROL_DTR) ? TIOCM_DTR : 0) 1043 | ((mcr & CONTROL_RTS) ? TIOCM_RTS : 0) 1044 | ((status & UART_CTS) ? TIOCM_CTS : 0) 1045 | ((status & UART_DSR) ? TIOCM_DSR : 0) 1046 | ((status & UART_RING) ? TIOCM_RI : 0) 1047 | ((status & UART_DCD) ? TIOCM_CD : 0); 1048 1049 dev_dbg(&port->dev, "%s - result = %x\n", __func__, result); 1050 1051 return result; 1052 } 1053 1054 static int pl2303_carrier_raised(struct usb_serial_port *port) 1055 { 1056 struct pl2303_private *priv = usb_get_serial_port_data(port); 1057 1058 if (priv->line_status & UART_DCD) 1059 return 1; 1060 1061 return 0; 1062 } 1063 1064 static int pl2303_set_break(struct usb_serial_port *port, bool enable) 1065 { 1066 struct usb_serial *serial = port->serial; 1067 u16 state; 1068 int result; 1069 1070 if (enable) 1071 state = BREAK_ON; 1072 else 1073 state = BREAK_OFF; 1074 1075 dev_dbg(&port->dev, "%s - turning break %s\n", __func__, 1076 state == BREAK_OFF ? "off" : "on"); 1077 1078 result = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), 1079 BREAK_REQUEST, BREAK_REQUEST_TYPE, state, 1080 0, NULL, 0, 100); 1081 if (result) { 1082 dev_err(&port->dev, "error sending break = %d\n", result); 1083 return result; 1084 } 1085 1086 return 0; 1087 } 1088 1089 static int pl2303_break_ctl(struct tty_struct *tty, int state) 1090 { 1091 struct usb_serial_port *port = tty->driver_data; 1092 1093 return pl2303_set_break(port, state); 1094 } 1095 1096 static void pl2303_update_line_status(struct usb_serial_port *port, 1097 unsigned char *data, 1098 unsigned int actual_length) 1099 { 1100 struct usb_serial *serial = port->serial; 1101 struct pl2303_serial_private *spriv = usb_get_serial_data(serial); 1102 struct pl2303_private *priv = usb_get_serial_port_data(port); 1103 struct tty_struct *tty; 1104 unsigned long flags; 1105 unsigned int status_idx = UART_STATE_INDEX; 1106 u8 status; 1107 u8 delta; 1108 1109 if (spriv->quirks & PL2303_QUIRK_UART_STATE_IDX0) 1110 status_idx = 0; 1111 1112 if (actual_length < status_idx + 1) 1113 return; 1114 1115 status = data[status_idx]; 1116 1117 /* Save off the uart status for others to look at */ 1118 spin_lock_irqsave(&priv->lock, flags); 1119 delta = priv->line_status ^ status; 1120 priv->line_status = status; 1121 spin_unlock_irqrestore(&priv->lock, flags); 1122 1123 if (status & UART_BREAK_ERROR) 1124 usb_serial_handle_break(port); 1125 1126 if (delta & UART_STATE_MSR_MASK) { 1127 if (delta & UART_CTS) 1128 port->icount.cts++; 1129 if (delta & UART_DSR) 1130 port->icount.dsr++; 1131 if (delta & UART_RING) 1132 port->icount.rng++; 1133 if (delta & UART_DCD) { 1134 port->icount.dcd++; 1135 tty = tty_port_tty_get(&port->port); 1136 if (tty) { 1137 usb_serial_handle_dcd_change(port, tty, 1138 status & UART_DCD); 1139 tty_kref_put(tty); 1140 } 1141 } 1142 1143 wake_up_interruptible(&port->port.delta_msr_wait); 1144 } 1145 } 1146 1147 static void pl2303_read_int_callback(struct urb *urb) 1148 { 1149 struct usb_serial_port *port = urb->context; 1150 unsigned char *data = urb->transfer_buffer; 1151 unsigned int actual_length = urb->actual_length; 1152 int status = urb->status; 1153 int retval; 1154 1155 switch (status) { 1156 case 0: 1157 /* success */ 1158 break; 1159 case -ECONNRESET: 1160 case -ENOENT: 1161 case -ESHUTDOWN: 1162 /* this urb is terminated, clean up */ 1163 dev_dbg(&port->dev, "%s - urb shutting down with status: %d\n", 1164 __func__, status); 1165 return; 1166 default: 1167 dev_dbg(&port->dev, "%s - nonzero urb status received: %d\n", 1168 __func__, status); 1169 goto exit; 1170 } 1171 1172 usb_serial_debug_data(&port->dev, __func__, 1173 urb->actual_length, urb->transfer_buffer); 1174 1175 pl2303_update_line_status(port, data, actual_length); 1176 1177 exit: 1178 retval = usb_submit_urb(urb, GFP_ATOMIC); 1179 if (retval) { 1180 dev_err(&port->dev, 1181 "%s - usb_submit_urb failed with result %d\n", 1182 __func__, retval); 1183 } 1184 } 1185 1186 static void pl2303_process_read_urb(struct urb *urb) 1187 { 1188 struct usb_serial_port *port = urb->context; 1189 struct pl2303_private *priv = usb_get_serial_port_data(port); 1190 unsigned char *data = urb->transfer_buffer; 1191 char tty_flag = TTY_NORMAL; 1192 unsigned long flags; 1193 u8 line_status; 1194 int i; 1195 1196 /* update line status */ 1197 spin_lock_irqsave(&priv->lock, flags); 1198 line_status = priv->line_status; 1199 priv->line_status &= ~UART_STATE_TRANSIENT_MASK; 1200 spin_unlock_irqrestore(&priv->lock, flags); 1201 1202 if (!urb->actual_length) 1203 return; 1204 1205 /* 1206 * Break takes precedence over parity, which takes precedence over 1207 * framing errors. 1208 */ 1209 if (line_status & UART_BREAK_ERROR) 1210 tty_flag = TTY_BREAK; 1211 else if (line_status & UART_PARITY_ERROR) 1212 tty_flag = TTY_PARITY; 1213 else if (line_status & UART_FRAME_ERROR) 1214 tty_flag = TTY_FRAME; 1215 1216 if (tty_flag != TTY_NORMAL) 1217 dev_dbg(&port->dev, "%s - tty_flag = %d\n", __func__, 1218 tty_flag); 1219 /* overrun is special, not associated with a char */ 1220 if (line_status & UART_OVERRUN_ERROR) 1221 tty_insert_flip_char(&port->port, 0, TTY_OVERRUN); 1222 1223 if (port->sysrq) { 1224 for (i = 0; i < urb->actual_length; ++i) 1225 if (!usb_serial_handle_sysrq_char(port, data[i])) 1226 tty_insert_flip_char(&port->port, data[i], 1227 tty_flag); 1228 } else { 1229 tty_insert_flip_string_fixed_flag(&port->port, data, tty_flag, 1230 urb->actual_length); 1231 } 1232 1233 tty_flip_buffer_push(&port->port); 1234 } 1235 1236 static struct usb_serial_driver pl2303_device = { 1237 .driver = { 1238 .owner = THIS_MODULE, 1239 .name = "pl2303", 1240 }, 1241 .id_table = id_table, 1242 .num_bulk_in = 1, 1243 .num_bulk_out = 1, 1244 .num_interrupt_in = 0, /* see pl2303_calc_num_ports */ 1245 .bulk_in_size = 256, 1246 .bulk_out_size = 256, 1247 .open = pl2303_open, 1248 .close = pl2303_close, 1249 .dtr_rts = pl2303_dtr_rts, 1250 .carrier_raised = pl2303_carrier_raised, 1251 .break_ctl = pl2303_break_ctl, 1252 .set_termios = pl2303_set_termios, 1253 .tiocmget = pl2303_tiocmget, 1254 .tiocmset = pl2303_tiocmset, 1255 .tiocmiwait = usb_serial_generic_tiocmiwait, 1256 .process_read_urb = pl2303_process_read_urb, 1257 .read_int_callback = pl2303_read_int_callback, 1258 .probe = pl2303_probe, 1259 .calc_num_ports = pl2303_calc_num_ports, 1260 .attach = pl2303_startup, 1261 .release = pl2303_release, 1262 .port_probe = pl2303_port_probe, 1263 .port_remove = pl2303_port_remove, 1264 }; 1265 1266 static struct usb_serial_driver * const serial_drivers[] = { 1267 &pl2303_device, NULL 1268 }; 1269 1270 module_usb_serial_driver(serial_drivers, id_table); 1271 1272 MODULE_DESCRIPTION("Prolific PL2303 USB to serial adaptor driver"); 1273 MODULE_LICENSE("GPL v2"); 1274