1 /* 2 * Prolific PL2303 USB to serial adaptor driver 3 * 4 * Copyright (C) 2001-2007 Greg Kroah-Hartman (greg@kroah.com) 5 * Copyright (C) 2003 IBM Corp. 6 * 7 * Original driver for 2.2.x by anonymous 8 * 9 * This program is free software; you can redistribute it and/or 10 * modify it under the terms of the GNU General Public License version 11 * 2 as published by the Free Software Foundation. 12 * 13 * See Documentation/usb/usb-serial.txt for more information on using this 14 * driver 15 */ 16 17 #include <linux/kernel.h> 18 #include <linux/errno.h> 19 #include <linux/slab.h> 20 #include <linux/tty.h> 21 #include <linux/tty_driver.h> 22 #include <linux/tty_flip.h> 23 #include <linux/serial.h> 24 #include <linux/module.h> 25 #include <linux/moduleparam.h> 26 #include <linux/spinlock.h> 27 #include <linux/uaccess.h> 28 #include <linux/usb.h> 29 #include <linux/usb/serial.h> 30 #include <asm/unaligned.h> 31 #include "pl2303.h" 32 33 34 #define PL2303_QUIRK_UART_STATE_IDX0 BIT(0) 35 #define PL2303_QUIRK_LEGACY BIT(1) 36 37 static const struct usb_device_id id_table[] = { 38 { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID) }, 39 { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_RSAQ2) }, 40 { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_DCU11) }, 41 { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_RSAQ3) }, 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(IODATA_VENDOR_ID, IODATA_PRODUCT_ID) }, 49 { USB_DEVICE(IODATA_VENDOR_ID, IODATA_PRODUCT_ID_RSAQ5) }, 50 { USB_DEVICE(ATEN_VENDOR_ID, ATEN_PRODUCT_ID) }, 51 { USB_DEVICE(ATEN_VENDOR_ID2, ATEN_PRODUCT_ID) }, 52 { USB_DEVICE(ELCOM_VENDOR_ID, ELCOM_PRODUCT_ID) }, 53 { USB_DEVICE(ELCOM_VENDOR_ID, ELCOM_PRODUCT_ID_UCSGT) }, 54 { USB_DEVICE(ITEGNO_VENDOR_ID, ITEGNO_PRODUCT_ID) }, 55 { USB_DEVICE(ITEGNO_VENDOR_ID, ITEGNO_PRODUCT_ID_2080) }, 56 { USB_DEVICE(MA620_VENDOR_ID, MA620_PRODUCT_ID) }, 57 { USB_DEVICE(RATOC_VENDOR_ID, RATOC_PRODUCT_ID) }, 58 { USB_DEVICE(TRIPP_VENDOR_ID, TRIPP_PRODUCT_ID) }, 59 { USB_DEVICE(RADIOSHACK_VENDOR_ID, RADIOSHACK_PRODUCT_ID) }, 60 { USB_DEVICE(DCU10_VENDOR_ID, DCU10_PRODUCT_ID) }, 61 { USB_DEVICE(SITECOM_VENDOR_ID, SITECOM_PRODUCT_ID) }, 62 { USB_DEVICE(ALCATEL_VENDOR_ID, ALCATEL_PRODUCT_ID) }, 63 { USB_DEVICE(SAMSUNG_VENDOR_ID, SAMSUNG_PRODUCT_ID) }, 64 { USB_DEVICE(SIEMENS_VENDOR_ID, SIEMENS_PRODUCT_ID_SX1), 65 .driver_info = PL2303_QUIRK_UART_STATE_IDX0 }, 66 { USB_DEVICE(SIEMENS_VENDOR_ID, SIEMENS_PRODUCT_ID_X65), 67 .driver_info = PL2303_QUIRK_UART_STATE_IDX0 }, 68 { USB_DEVICE(SIEMENS_VENDOR_ID, SIEMENS_PRODUCT_ID_X75), 69 .driver_info = PL2303_QUIRK_UART_STATE_IDX0 }, 70 { USB_DEVICE(SIEMENS_VENDOR_ID, SIEMENS_PRODUCT_ID_EF81) }, 71 { USB_DEVICE(BENQ_VENDOR_ID, BENQ_PRODUCT_ID_S81) }, /* Benq/Siemens S81 */ 72 { USB_DEVICE(SYNTECH_VENDOR_ID, SYNTECH_PRODUCT_ID) }, 73 { USB_DEVICE(NOKIA_CA42_VENDOR_ID, NOKIA_CA42_PRODUCT_ID) }, 74 { USB_DEVICE(CA_42_CA42_VENDOR_ID, CA_42_CA42_PRODUCT_ID) }, 75 { USB_DEVICE(SAGEM_VENDOR_ID, SAGEM_PRODUCT_ID) }, 76 { USB_DEVICE(LEADTEK_VENDOR_ID, LEADTEK_9531_PRODUCT_ID) }, 77 { USB_DEVICE(SPEEDDRAGON_VENDOR_ID, SPEEDDRAGON_PRODUCT_ID) }, 78 { USB_DEVICE(DATAPILOT_U2_VENDOR_ID, DATAPILOT_U2_PRODUCT_ID) }, 79 { USB_DEVICE(BELKIN_VENDOR_ID, BELKIN_PRODUCT_ID) }, 80 { USB_DEVICE(ALCOR_VENDOR_ID, ALCOR_PRODUCT_ID) }, 81 { USB_DEVICE(WS002IN_VENDOR_ID, WS002IN_PRODUCT_ID) }, 82 { USB_DEVICE(COREGA_VENDOR_ID, COREGA_PRODUCT_ID) }, 83 { USB_DEVICE(YCCABLE_VENDOR_ID, YCCABLE_PRODUCT_ID) }, 84 { USB_DEVICE(SUPERIAL_VENDOR_ID, SUPERIAL_PRODUCT_ID) }, 85 { USB_DEVICE(HP_VENDOR_ID, HP_LD220_PRODUCT_ID) }, 86 { USB_DEVICE(HP_VENDOR_ID, HP_LD960_PRODUCT_ID) }, 87 { USB_DEVICE(HP_VENDOR_ID, HP_LCM220_PRODUCT_ID) }, 88 { USB_DEVICE(HP_VENDOR_ID, HP_LCM960_PRODUCT_ID) }, 89 { USB_DEVICE(CRESSI_VENDOR_ID, CRESSI_EDY_PRODUCT_ID) }, 90 { USB_DEVICE(ZEAGLE_VENDOR_ID, ZEAGLE_N2ITION3_PRODUCT_ID) }, 91 { USB_DEVICE(SONY_VENDOR_ID, SONY_QN3USB_PRODUCT_ID) }, 92 { USB_DEVICE(SANWA_VENDOR_ID, SANWA_PRODUCT_ID) }, 93 { USB_DEVICE(ADLINK_VENDOR_ID, ADLINK_ND6530_PRODUCT_ID) }, 94 { USB_DEVICE(SMART_VENDOR_ID, SMART_PRODUCT_ID) }, 95 { } /* Terminating entry */ 96 }; 97 98 MODULE_DEVICE_TABLE(usb, id_table); 99 100 #define SET_LINE_REQUEST_TYPE 0x21 101 #define SET_LINE_REQUEST 0x20 102 103 #define SET_CONTROL_REQUEST_TYPE 0x21 104 #define SET_CONTROL_REQUEST 0x22 105 #define CONTROL_DTR 0x01 106 #define CONTROL_RTS 0x02 107 108 #define BREAK_REQUEST_TYPE 0x21 109 #define BREAK_REQUEST 0x23 110 #define BREAK_ON 0xffff 111 #define BREAK_OFF 0x0000 112 113 #define GET_LINE_REQUEST_TYPE 0xa1 114 #define GET_LINE_REQUEST 0x21 115 116 #define VENDOR_WRITE_REQUEST_TYPE 0x40 117 #define VENDOR_WRITE_REQUEST 0x01 118 119 #define VENDOR_READ_REQUEST_TYPE 0xc0 120 #define VENDOR_READ_REQUEST 0x01 121 122 #define UART_STATE_INDEX 8 123 #define UART_STATE_MSR_MASK 0x8b 124 #define UART_STATE_TRANSIENT_MASK 0x74 125 #define UART_DCD 0x01 126 #define UART_DSR 0x02 127 #define UART_BREAK_ERROR 0x04 128 #define UART_RING 0x08 129 #define UART_FRAME_ERROR 0x10 130 #define UART_PARITY_ERROR 0x20 131 #define UART_OVERRUN_ERROR 0x40 132 #define UART_CTS 0x80 133 134 135 enum pl2303_type { 136 TYPE_01, /* Type 0 and 1 (difference unknown) */ 137 TYPE_HX, /* HX version of the pl2303 chip */ 138 TYPE_COUNT 139 }; 140 141 struct pl2303_type_data { 142 speed_t max_baud_rate; 143 unsigned long quirks; 144 }; 145 146 struct pl2303_serial_private { 147 const struct pl2303_type_data *type; 148 unsigned long quirks; 149 }; 150 151 struct pl2303_private { 152 spinlock_t lock; 153 u8 line_control; 154 u8 line_status; 155 156 u8 line_settings[7]; 157 }; 158 159 static const struct pl2303_type_data pl2303_type_data[TYPE_COUNT] = { 160 [TYPE_01] = { 161 .max_baud_rate = 1228800, 162 .quirks = PL2303_QUIRK_LEGACY, 163 }, 164 }; 165 166 static int pl2303_vendor_read(struct usb_serial *serial, u16 value, 167 unsigned char buf[1]) 168 { 169 struct device *dev = &serial->interface->dev; 170 int res; 171 172 res = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0), 173 VENDOR_READ_REQUEST, VENDOR_READ_REQUEST_TYPE, 174 value, 0, buf, 1, 100); 175 if (res != 1) { 176 dev_err(dev, "%s - failed to read [%04x]: %d\n", __func__, 177 value, res); 178 if (res >= 0) 179 res = -EIO; 180 181 return res; 182 } 183 184 dev_dbg(dev, "%s - [%04x] = %02x\n", __func__, value, buf[0]); 185 186 return 0; 187 } 188 189 static int pl2303_vendor_write(struct usb_serial *serial, u16 value, u16 index) 190 { 191 struct device *dev = &serial->interface->dev; 192 int res; 193 194 dev_dbg(dev, "%s - [%04x] = %02x\n", __func__, value, index); 195 196 res = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), 197 VENDOR_WRITE_REQUEST, VENDOR_WRITE_REQUEST_TYPE, 198 value, index, NULL, 0, 100); 199 if (res) { 200 dev_err(dev, "%s - failed to write [%04x]: %d\n", __func__, 201 value, res); 202 return res; 203 } 204 205 return 0; 206 } 207 208 static int pl2303_probe(struct usb_serial *serial, 209 const struct usb_device_id *id) 210 { 211 usb_set_serial_data(serial, (void *)id->driver_info); 212 213 return 0; 214 } 215 216 static int pl2303_startup(struct usb_serial *serial) 217 { 218 struct pl2303_serial_private *spriv; 219 enum pl2303_type type = TYPE_01; 220 unsigned char *buf; 221 222 spriv = kzalloc(sizeof(*spriv), GFP_KERNEL); 223 if (!spriv) 224 return -ENOMEM; 225 226 buf = kmalloc(1, GFP_KERNEL); 227 if (!buf) { 228 kfree(spriv); 229 return -ENOMEM; 230 } 231 232 if (serial->dev->descriptor.bDeviceClass == 0x02) 233 type = TYPE_01; /* type 0 */ 234 else if (serial->dev->descriptor.bMaxPacketSize0 == 0x40) 235 type = TYPE_HX; 236 else if (serial->dev->descriptor.bDeviceClass == 0x00) 237 type = TYPE_01; /* type 1 */ 238 else if (serial->dev->descriptor.bDeviceClass == 0xFF) 239 type = TYPE_01; /* type 1 */ 240 dev_dbg(&serial->interface->dev, "device type: %d\n", type); 241 242 spriv->type = &pl2303_type_data[type]; 243 spriv->quirks = (unsigned long)usb_get_serial_data(serial); 244 spriv->quirks |= spriv->type->quirks; 245 246 usb_set_serial_data(serial, spriv); 247 248 pl2303_vendor_read(serial, 0x8484, buf); 249 pl2303_vendor_write(serial, 0x0404, 0); 250 pl2303_vendor_read(serial, 0x8484, buf); 251 pl2303_vendor_read(serial, 0x8383, buf); 252 pl2303_vendor_read(serial, 0x8484, buf); 253 pl2303_vendor_write(serial, 0x0404, 1); 254 pl2303_vendor_read(serial, 0x8484, buf); 255 pl2303_vendor_read(serial, 0x8383, buf); 256 pl2303_vendor_write(serial, 0, 1); 257 pl2303_vendor_write(serial, 1, 0); 258 if (spriv->quirks & PL2303_QUIRK_LEGACY) 259 pl2303_vendor_write(serial, 2, 0x24); 260 else 261 pl2303_vendor_write(serial, 2, 0x44); 262 263 kfree(buf); 264 265 return 0; 266 } 267 268 static void pl2303_release(struct usb_serial *serial) 269 { 270 struct pl2303_serial_private *spriv = usb_get_serial_data(serial); 271 272 kfree(spriv); 273 } 274 275 static int pl2303_port_probe(struct usb_serial_port *port) 276 { 277 struct pl2303_private *priv; 278 279 priv = kzalloc(sizeof(*priv), GFP_KERNEL); 280 if (!priv) 281 return -ENOMEM; 282 283 spin_lock_init(&priv->lock); 284 285 usb_set_serial_port_data(port, priv); 286 287 port->port.drain_delay = 256; 288 289 return 0; 290 } 291 292 static int pl2303_port_remove(struct usb_serial_port *port) 293 { 294 struct pl2303_private *priv = usb_get_serial_port_data(port); 295 296 kfree(priv); 297 298 return 0; 299 } 300 301 static int pl2303_set_control_lines(struct usb_serial_port *port, u8 value) 302 { 303 struct usb_device *dev = port->serial->dev; 304 int retval; 305 306 dev_dbg(&port->dev, "%s - %02x\n", __func__, value); 307 308 retval = usb_control_msg(dev, usb_sndctrlpipe(dev, 0), 309 SET_CONTROL_REQUEST, SET_CONTROL_REQUEST_TYPE, 310 value, 0, NULL, 0, 100); 311 if (retval) 312 dev_err(&port->dev, "%s - failed: %d\n", __func__, retval); 313 314 return retval; 315 } 316 317 /* 318 * Returns the nearest supported baud rate that can be set directly without 319 * using divisors. 320 */ 321 static speed_t pl2303_get_supported_baud_rate(speed_t baud) 322 { 323 static const speed_t baud_sup[] = { 324 75, 150, 300, 600, 1200, 1800, 2400, 3600, 4800, 7200, 9600, 325 14400, 19200, 28800, 38400, 57600, 115200, 230400, 460800, 326 614400, 921600, 1228800, 2457600, 3000000, 6000000 327 }; 328 329 unsigned i; 330 331 for (i = 0; i < ARRAY_SIZE(baud_sup); ++i) { 332 if (baud_sup[i] > baud) 333 break; 334 } 335 336 if (i == ARRAY_SIZE(baud_sup)) 337 baud = baud_sup[i - 1]; 338 else if (i > 0 && (baud_sup[i] - baud) > (baud - baud_sup[i - 1])) 339 baud = baud_sup[i - 1]; 340 else 341 baud = baud_sup[i]; 342 343 return baud; 344 } 345 346 /* 347 * NOTE: If unsupported baud rates are set directly, the PL2303 seems to 348 * use 9600 baud. 349 */ 350 static speed_t pl2303_encode_baud_rate_direct(unsigned char buf[4], 351 speed_t baud) 352 { 353 put_unaligned_le32(baud, buf); 354 355 return baud; 356 } 357 358 static speed_t pl2303_encode_baud_rate_divisor(unsigned char buf[4], 359 speed_t baud) 360 { 361 unsigned int tmp; 362 363 /* 364 * Apparently the formula is: 365 * baudrate = 12M * 32 / (2^buf[1]) / buf[0] 366 */ 367 tmp = 12000000 * 32 / baud; 368 buf[3] = 0x80; 369 buf[2] = 0; 370 buf[1] = (tmp >= 256); 371 while (tmp >= 256) { 372 tmp >>= 2; 373 buf[1] <<= 1; 374 } 375 buf[0] = tmp; 376 377 return baud; 378 } 379 380 static void pl2303_encode_baud_rate(struct tty_struct *tty, 381 struct usb_serial_port *port, 382 u8 buf[4]) 383 { 384 struct usb_serial *serial = port->serial; 385 struct pl2303_serial_private *spriv = usb_get_serial_data(serial); 386 speed_t baud_sup; 387 speed_t baud; 388 389 baud = tty_get_baud_rate(tty); 390 dev_dbg(&port->dev, "baud requested = %u\n", baud); 391 if (!baud) 392 return; 393 394 if (spriv->type->max_baud_rate) 395 baud = min_t(speed_t, baud, spriv->type->max_baud_rate); 396 /* 397 * Set baud rate to nearest supported value. 398 * 399 * NOTE: Baud rate 500k can only be set using divisors. 400 */ 401 baud_sup = pl2303_get_supported_baud_rate(baud); 402 403 if (baud == 500000) 404 baud = pl2303_encode_baud_rate_divisor(buf, baud); 405 else 406 baud = pl2303_encode_baud_rate_direct(buf, baud_sup); 407 408 /* Save resulting baud rate */ 409 tty_encode_baud_rate(tty, baud, baud); 410 dev_dbg(&port->dev, "baud set = %u\n", baud); 411 } 412 413 static int pl2303_get_line_request(struct usb_serial_port *port, 414 unsigned char buf[7]) 415 { 416 struct usb_device *udev = port->serial->dev; 417 int ret; 418 419 ret = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0), 420 GET_LINE_REQUEST, GET_LINE_REQUEST_TYPE, 421 0, 0, buf, 7, 100); 422 if (ret != 7) { 423 dev_err(&port->dev, "%s - failed: %d\n", __func__, ret); 424 425 if (ret > 0) 426 ret = -EIO; 427 428 return ret; 429 } 430 431 dev_dbg(&port->dev, "%s - %7ph\n", __func__, buf); 432 433 return 0; 434 } 435 436 static int pl2303_set_line_request(struct usb_serial_port *port, 437 unsigned char buf[7]) 438 { 439 struct usb_device *udev = port->serial->dev; 440 int ret; 441 442 ret = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), 443 SET_LINE_REQUEST, SET_LINE_REQUEST_TYPE, 444 0, 0, buf, 7, 100); 445 if (ret != 7) { 446 dev_err(&port->dev, "%s - failed: %d\n", __func__, ret); 447 448 if (ret > 0) 449 ret = -EIO; 450 451 return ret; 452 } 453 454 dev_dbg(&port->dev, "%s - %7ph\n", __func__, buf); 455 456 return 0; 457 } 458 459 static void pl2303_set_termios(struct tty_struct *tty, 460 struct usb_serial_port *port, struct ktermios *old_termios) 461 { 462 struct usb_serial *serial = port->serial; 463 struct pl2303_serial_private *spriv = usb_get_serial_data(serial); 464 struct pl2303_private *priv = usb_get_serial_port_data(port); 465 unsigned long flags; 466 unsigned char *buf; 467 int ret; 468 u8 control; 469 470 if (old_termios && !tty_termios_hw_change(&tty->termios, old_termios)) 471 return; 472 473 buf = kzalloc(7, GFP_KERNEL); 474 if (!buf) { 475 /* Report back no change occurred */ 476 if (old_termios) 477 tty->termios = *old_termios; 478 return; 479 } 480 481 pl2303_get_line_request(port, buf); 482 483 switch (C_CSIZE(tty)) { 484 case CS5: 485 buf[6] = 5; 486 break; 487 case CS6: 488 buf[6] = 6; 489 break; 490 case CS7: 491 buf[6] = 7; 492 break; 493 default: 494 case CS8: 495 buf[6] = 8; 496 } 497 dev_dbg(&port->dev, "data bits = %d\n", buf[6]); 498 499 /* For reference buf[0]:buf[3] baud rate value */ 500 pl2303_encode_baud_rate(tty, port, &buf[0]); 501 502 /* For reference buf[4]=0 is 1 stop bits */ 503 /* For reference buf[4]=1 is 1.5 stop bits */ 504 /* For reference buf[4]=2 is 2 stop bits */ 505 if (C_CSTOPB(tty)) { 506 /* 507 * NOTE: Comply with "real" UARTs / RS232: 508 * use 1.5 instead of 2 stop bits with 5 data bits 509 */ 510 if (C_CSIZE(tty) == CS5) { 511 buf[4] = 1; 512 dev_dbg(&port->dev, "stop bits = 1.5\n"); 513 } else { 514 buf[4] = 2; 515 dev_dbg(&port->dev, "stop bits = 2\n"); 516 } 517 } else { 518 buf[4] = 0; 519 dev_dbg(&port->dev, "stop bits = 1\n"); 520 } 521 522 if (C_PARENB(tty)) { 523 /* For reference buf[5]=0 is none parity */ 524 /* For reference buf[5]=1 is odd parity */ 525 /* For reference buf[5]=2 is even parity */ 526 /* For reference buf[5]=3 is mark parity */ 527 /* For reference buf[5]=4 is space parity */ 528 if (C_PARODD(tty)) { 529 if (C_CMSPAR(tty)) { 530 buf[5] = 3; 531 dev_dbg(&port->dev, "parity = mark\n"); 532 } else { 533 buf[5] = 1; 534 dev_dbg(&port->dev, "parity = odd\n"); 535 } 536 } else { 537 if (C_CMSPAR(tty)) { 538 buf[5] = 4; 539 dev_dbg(&port->dev, "parity = space\n"); 540 } else { 541 buf[5] = 2; 542 dev_dbg(&port->dev, "parity = even\n"); 543 } 544 } 545 } else { 546 buf[5] = 0; 547 dev_dbg(&port->dev, "parity = none\n"); 548 } 549 550 /* 551 * Some PL2303 are known to lose bytes if you change serial settings 552 * even to the same values as before. Thus we actually need to filter 553 * in this specific case. 554 * 555 * Note that the tty_termios_hw_change check above is not sufficient 556 * as a previously requested baud rate may differ from the one 557 * actually used (and stored in old_termios). 558 * 559 * NOTE: No additional locking needed for line_settings as it is 560 * only used in set_termios, which is serialised against itself. 561 */ 562 if (!old_termios || memcmp(buf, priv->line_settings, 7)) { 563 ret = pl2303_set_line_request(port, buf); 564 if (!ret) 565 memcpy(priv->line_settings, buf, 7); 566 } 567 568 /* change control lines if we are switching to or from B0 */ 569 spin_lock_irqsave(&priv->lock, flags); 570 control = priv->line_control; 571 if (C_BAUD(tty) == B0) 572 priv->line_control &= ~(CONTROL_DTR | CONTROL_RTS); 573 else if (old_termios && (old_termios->c_cflag & CBAUD) == B0) 574 priv->line_control |= (CONTROL_DTR | CONTROL_RTS); 575 if (control != priv->line_control) { 576 control = priv->line_control; 577 spin_unlock_irqrestore(&priv->lock, flags); 578 pl2303_set_control_lines(port, control); 579 } else { 580 spin_unlock_irqrestore(&priv->lock, flags); 581 } 582 583 if (C_CRTSCTS(tty)) { 584 if (spriv->quirks & PL2303_QUIRK_LEGACY) 585 pl2303_vendor_write(serial, 0x0, 0x41); 586 else 587 pl2303_vendor_write(serial, 0x0, 0x61); 588 } else { 589 pl2303_vendor_write(serial, 0x0, 0x0); 590 } 591 592 kfree(buf); 593 } 594 595 static void pl2303_dtr_rts(struct usb_serial_port *port, int on) 596 { 597 struct pl2303_private *priv = usb_get_serial_port_data(port); 598 unsigned long flags; 599 u8 control; 600 601 spin_lock_irqsave(&priv->lock, flags); 602 if (on) 603 priv->line_control |= (CONTROL_DTR | CONTROL_RTS); 604 else 605 priv->line_control &= ~(CONTROL_DTR | CONTROL_RTS); 606 control = priv->line_control; 607 spin_unlock_irqrestore(&priv->lock, flags); 608 609 pl2303_set_control_lines(port, control); 610 } 611 612 static void pl2303_close(struct usb_serial_port *port) 613 { 614 usb_serial_generic_close(port); 615 usb_kill_urb(port->interrupt_in_urb); 616 } 617 618 static int pl2303_open(struct tty_struct *tty, struct usb_serial_port *port) 619 { 620 struct usb_serial *serial = port->serial; 621 struct pl2303_serial_private *spriv = usb_get_serial_data(serial); 622 int result; 623 624 if (spriv->quirks & PL2303_QUIRK_LEGACY) { 625 usb_clear_halt(serial->dev, port->write_urb->pipe); 626 usb_clear_halt(serial->dev, port->read_urb->pipe); 627 } else { 628 /* reset upstream data pipes */ 629 pl2303_vendor_write(serial, 8, 0); 630 pl2303_vendor_write(serial, 9, 0); 631 } 632 633 /* Setup termios */ 634 if (tty) 635 pl2303_set_termios(tty, port, NULL); 636 637 result = usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL); 638 if (result) { 639 dev_err(&port->dev, "failed to submit interrupt urb: %d\n", 640 result); 641 return result; 642 } 643 644 result = usb_serial_generic_open(tty, port); 645 if (result) { 646 usb_kill_urb(port->interrupt_in_urb); 647 return result; 648 } 649 650 return 0; 651 } 652 653 static int pl2303_tiocmset(struct tty_struct *tty, 654 unsigned int set, unsigned int clear) 655 { 656 struct usb_serial_port *port = tty->driver_data; 657 struct pl2303_private *priv = usb_get_serial_port_data(port); 658 unsigned long flags; 659 u8 control; 660 int ret; 661 662 spin_lock_irqsave(&priv->lock, flags); 663 if (set & TIOCM_RTS) 664 priv->line_control |= CONTROL_RTS; 665 if (set & TIOCM_DTR) 666 priv->line_control |= CONTROL_DTR; 667 if (clear & TIOCM_RTS) 668 priv->line_control &= ~CONTROL_RTS; 669 if (clear & TIOCM_DTR) 670 priv->line_control &= ~CONTROL_DTR; 671 control = priv->line_control; 672 spin_unlock_irqrestore(&priv->lock, flags); 673 674 ret = pl2303_set_control_lines(port, control); 675 if (ret) 676 return usb_translate_errors(ret); 677 678 return 0; 679 } 680 681 static int pl2303_tiocmget(struct tty_struct *tty) 682 { 683 struct usb_serial_port *port = tty->driver_data; 684 struct pl2303_private *priv = usb_get_serial_port_data(port); 685 unsigned long flags; 686 unsigned int mcr; 687 unsigned int status; 688 unsigned int result; 689 690 spin_lock_irqsave(&priv->lock, flags); 691 mcr = priv->line_control; 692 status = priv->line_status; 693 spin_unlock_irqrestore(&priv->lock, flags); 694 695 result = ((mcr & CONTROL_DTR) ? TIOCM_DTR : 0) 696 | ((mcr & CONTROL_RTS) ? TIOCM_RTS : 0) 697 | ((status & UART_CTS) ? TIOCM_CTS : 0) 698 | ((status & UART_DSR) ? TIOCM_DSR : 0) 699 | ((status & UART_RING) ? TIOCM_RI : 0) 700 | ((status & UART_DCD) ? TIOCM_CD : 0); 701 702 dev_dbg(&port->dev, "%s - result = %x\n", __func__, result); 703 704 return result; 705 } 706 707 static int pl2303_carrier_raised(struct usb_serial_port *port) 708 { 709 struct pl2303_private *priv = usb_get_serial_port_data(port); 710 711 if (priv->line_status & UART_DCD) 712 return 1; 713 714 return 0; 715 } 716 717 static int pl2303_ioctl(struct tty_struct *tty, 718 unsigned int cmd, unsigned long arg) 719 { 720 struct serial_struct ser; 721 struct usb_serial_port *port = tty->driver_data; 722 723 switch (cmd) { 724 case TIOCGSERIAL: 725 memset(&ser, 0, sizeof ser); 726 ser.type = PORT_16654; 727 ser.line = port->minor; 728 ser.port = port->port_number; 729 ser.baud_base = 460800; 730 731 if (copy_to_user((void __user *)arg, &ser, sizeof ser)) 732 return -EFAULT; 733 734 return 0; 735 default: 736 break; 737 } 738 739 return -ENOIOCTLCMD; 740 } 741 742 static void pl2303_break_ctl(struct tty_struct *tty, int break_state) 743 { 744 struct usb_serial_port *port = tty->driver_data; 745 struct usb_serial *serial = port->serial; 746 u16 state; 747 int result; 748 749 if (break_state == 0) 750 state = BREAK_OFF; 751 else 752 state = BREAK_ON; 753 754 dev_dbg(&port->dev, "%s - turning break %s\n", __func__, 755 state == BREAK_OFF ? "off" : "on"); 756 757 result = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), 758 BREAK_REQUEST, BREAK_REQUEST_TYPE, state, 759 0, NULL, 0, 100); 760 if (result) 761 dev_err(&port->dev, "error sending break = %d\n", result); 762 } 763 764 static void pl2303_update_line_status(struct usb_serial_port *port, 765 unsigned char *data, 766 unsigned int actual_length) 767 { 768 struct usb_serial *serial = port->serial; 769 struct pl2303_serial_private *spriv = usb_get_serial_data(serial); 770 struct pl2303_private *priv = usb_get_serial_port_data(port); 771 struct tty_struct *tty; 772 unsigned long flags; 773 unsigned int status_idx = UART_STATE_INDEX; 774 u8 status; 775 u8 delta; 776 777 if (spriv->quirks & PL2303_QUIRK_UART_STATE_IDX0) 778 status_idx = 0; 779 780 if (actual_length < status_idx + 1) 781 return; 782 783 status = data[status_idx]; 784 785 /* Save off the uart status for others to look at */ 786 spin_lock_irqsave(&priv->lock, flags); 787 delta = priv->line_status ^ status; 788 priv->line_status = status; 789 spin_unlock_irqrestore(&priv->lock, flags); 790 791 if (status & UART_BREAK_ERROR) 792 usb_serial_handle_break(port); 793 794 if (delta & UART_STATE_MSR_MASK) { 795 if (delta & UART_CTS) 796 port->icount.cts++; 797 if (delta & UART_DSR) 798 port->icount.dsr++; 799 if (delta & UART_RING) 800 port->icount.rng++; 801 if (delta & UART_DCD) { 802 port->icount.dcd++; 803 tty = tty_port_tty_get(&port->port); 804 if (tty) { 805 usb_serial_handle_dcd_change(port, tty, 806 status & UART_DCD); 807 tty_kref_put(tty); 808 } 809 } 810 811 wake_up_interruptible(&port->port.delta_msr_wait); 812 } 813 } 814 815 static void pl2303_read_int_callback(struct urb *urb) 816 { 817 struct usb_serial_port *port = urb->context; 818 unsigned char *data = urb->transfer_buffer; 819 unsigned int actual_length = urb->actual_length; 820 int status = urb->status; 821 int retval; 822 823 switch (status) { 824 case 0: 825 /* success */ 826 break; 827 case -ECONNRESET: 828 case -ENOENT: 829 case -ESHUTDOWN: 830 /* this urb is terminated, clean up */ 831 dev_dbg(&port->dev, "%s - urb shutting down with status: %d\n", 832 __func__, status); 833 return; 834 default: 835 dev_dbg(&port->dev, "%s - nonzero urb status received: %d\n", 836 __func__, status); 837 goto exit; 838 } 839 840 usb_serial_debug_data(&port->dev, __func__, 841 urb->actual_length, urb->transfer_buffer); 842 843 pl2303_update_line_status(port, data, actual_length); 844 845 exit: 846 retval = usb_submit_urb(urb, GFP_ATOMIC); 847 if (retval) { 848 dev_err(&port->dev, 849 "%s - usb_submit_urb failed with result %d\n", 850 __func__, retval); 851 } 852 } 853 854 static void pl2303_process_read_urb(struct urb *urb) 855 { 856 struct usb_serial_port *port = urb->context; 857 struct pl2303_private *priv = usb_get_serial_port_data(port); 858 unsigned char *data = urb->transfer_buffer; 859 char tty_flag = TTY_NORMAL; 860 unsigned long flags; 861 u8 line_status; 862 int i; 863 864 /* update line status */ 865 spin_lock_irqsave(&priv->lock, flags); 866 line_status = priv->line_status; 867 priv->line_status &= ~UART_STATE_TRANSIENT_MASK; 868 spin_unlock_irqrestore(&priv->lock, flags); 869 870 if (!urb->actual_length) 871 return; 872 873 /* 874 * Break takes precedence over parity, which takes precedence over 875 * framing errors. 876 */ 877 if (line_status & UART_BREAK_ERROR) 878 tty_flag = TTY_BREAK; 879 else if (line_status & UART_PARITY_ERROR) 880 tty_flag = TTY_PARITY; 881 else if (line_status & UART_FRAME_ERROR) 882 tty_flag = TTY_FRAME; 883 884 if (tty_flag != TTY_NORMAL) 885 dev_dbg(&port->dev, "%s - tty_flag = %d\n", __func__, 886 tty_flag); 887 /* overrun is special, not associated with a char */ 888 if (line_status & UART_OVERRUN_ERROR) 889 tty_insert_flip_char(&port->port, 0, TTY_OVERRUN); 890 891 if (port->port.console && port->sysrq) { 892 for (i = 0; i < urb->actual_length; ++i) 893 if (!usb_serial_handle_sysrq_char(port, data[i])) 894 tty_insert_flip_char(&port->port, data[i], 895 tty_flag); 896 } else { 897 tty_insert_flip_string_fixed_flag(&port->port, data, tty_flag, 898 urb->actual_length); 899 } 900 901 tty_flip_buffer_push(&port->port); 902 } 903 904 static struct usb_serial_driver pl2303_device = { 905 .driver = { 906 .owner = THIS_MODULE, 907 .name = "pl2303", 908 }, 909 .id_table = id_table, 910 .num_ports = 1, 911 .bulk_in_size = 256, 912 .bulk_out_size = 256, 913 .open = pl2303_open, 914 .close = pl2303_close, 915 .dtr_rts = pl2303_dtr_rts, 916 .carrier_raised = pl2303_carrier_raised, 917 .ioctl = pl2303_ioctl, 918 .break_ctl = pl2303_break_ctl, 919 .set_termios = pl2303_set_termios, 920 .tiocmget = pl2303_tiocmget, 921 .tiocmset = pl2303_tiocmset, 922 .tiocmiwait = usb_serial_generic_tiocmiwait, 923 .process_read_urb = pl2303_process_read_urb, 924 .read_int_callback = pl2303_read_int_callback, 925 .probe = pl2303_probe, 926 .attach = pl2303_startup, 927 .release = pl2303_release, 928 .port_probe = pl2303_port_probe, 929 .port_remove = pl2303_port_remove, 930 }; 931 932 static struct usb_serial_driver * const serial_drivers[] = { 933 &pl2303_device, NULL 934 }; 935 936 module_usb_serial_driver(serial_drivers, id_table); 937 938 MODULE_DESCRIPTION("Prolific PL2303 USB to serial adaptor driver"); 939 MODULE_LICENSE("GPL"); 940