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 18 #include <linux/kernel.h> 19 #include <linux/errno.h> 20 #include <linux/init.h> 21 #include <linux/slab.h> 22 #include <linux/tty.h> 23 #include <linux/tty_driver.h> 24 #include <linux/tty_flip.h> 25 #include <linux/serial.h> 26 #include <linux/module.h> 27 #include <linux/moduleparam.h> 28 #include <linux/spinlock.h> 29 #include <linux/uaccess.h> 30 #include <linux/usb.h> 31 #include <linux/usb/serial.h> 32 #include <asm/unaligned.h> 33 #include "pl2303.h" 34 35 /* 36 * Version Information 37 */ 38 #define DRIVER_DESC "Prolific PL2303 USB to serial adaptor driver" 39 40 static const struct usb_device_id id_table[] = { 41 { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID) }, 42 { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_RSAQ2) }, 43 { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_DCU11) }, 44 { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_RSAQ3) }, 45 { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_PHAROS) }, 46 { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_ALDIGA) }, 47 { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_MMX) }, 48 { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_GPRS) }, 49 { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_HCR331) }, 50 { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_MOTOROLA) }, 51 { USB_DEVICE(IODATA_VENDOR_ID, IODATA_PRODUCT_ID) }, 52 { USB_DEVICE(IODATA_VENDOR_ID, IODATA_PRODUCT_ID_RSAQ5) }, 53 { USB_DEVICE(ATEN_VENDOR_ID, ATEN_PRODUCT_ID) }, 54 { USB_DEVICE(ATEN_VENDOR_ID2, ATEN_PRODUCT_ID) }, 55 { USB_DEVICE(ELCOM_VENDOR_ID, ELCOM_PRODUCT_ID) }, 56 { USB_DEVICE(ELCOM_VENDOR_ID, ELCOM_PRODUCT_ID_UCSGT) }, 57 { USB_DEVICE(ITEGNO_VENDOR_ID, ITEGNO_PRODUCT_ID) }, 58 { USB_DEVICE(ITEGNO_VENDOR_ID, ITEGNO_PRODUCT_ID_2080) }, 59 { USB_DEVICE(MA620_VENDOR_ID, MA620_PRODUCT_ID) }, 60 { USB_DEVICE(RATOC_VENDOR_ID, RATOC_PRODUCT_ID) }, 61 { USB_DEVICE(TRIPP_VENDOR_ID, TRIPP_PRODUCT_ID) }, 62 { USB_DEVICE(RADIOSHACK_VENDOR_ID, RADIOSHACK_PRODUCT_ID) }, 63 { USB_DEVICE(DCU10_VENDOR_ID, DCU10_PRODUCT_ID) }, 64 { USB_DEVICE(SITECOM_VENDOR_ID, SITECOM_PRODUCT_ID) }, 65 { USB_DEVICE(ALCATEL_VENDOR_ID, ALCATEL_PRODUCT_ID) }, 66 { USB_DEVICE(SAMSUNG_VENDOR_ID, SAMSUNG_PRODUCT_ID) }, 67 { USB_DEVICE(SIEMENS_VENDOR_ID, SIEMENS_PRODUCT_ID_SX1) }, 68 { USB_DEVICE(SIEMENS_VENDOR_ID, SIEMENS_PRODUCT_ID_X65) }, 69 { USB_DEVICE(SIEMENS_VENDOR_ID, SIEMENS_PRODUCT_ID_X75) }, 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(CRESSI_VENDOR_ID, CRESSI_EDY_PRODUCT_ID) }, 87 { USB_DEVICE(ZEAGLE_VENDOR_ID, ZEAGLE_N2ITION3_PRODUCT_ID) }, 88 { USB_DEVICE(SONY_VENDOR_ID, SONY_QN3USB_PRODUCT_ID) }, 89 { USB_DEVICE(SANWA_VENDOR_ID, SANWA_PRODUCT_ID) }, 90 { USB_DEVICE(ADLINK_VENDOR_ID, ADLINK_ND6530_PRODUCT_ID) }, 91 { USB_DEVICE(SMART_VENDOR_ID, SMART_PRODUCT_ID) }, 92 { } /* Terminating entry */ 93 }; 94 95 MODULE_DEVICE_TABLE(usb, id_table); 96 97 #define SET_LINE_REQUEST_TYPE 0x21 98 #define SET_LINE_REQUEST 0x20 99 100 #define SET_CONTROL_REQUEST_TYPE 0x21 101 #define SET_CONTROL_REQUEST 0x22 102 #define CONTROL_DTR 0x01 103 #define CONTROL_RTS 0x02 104 105 #define BREAK_REQUEST_TYPE 0x21 106 #define BREAK_REQUEST 0x23 107 #define BREAK_ON 0xffff 108 #define BREAK_OFF 0x0000 109 110 #define GET_LINE_REQUEST_TYPE 0xa1 111 #define GET_LINE_REQUEST 0x21 112 113 #define VENDOR_WRITE_REQUEST_TYPE 0x40 114 #define VENDOR_WRITE_REQUEST 0x01 115 116 #define VENDOR_READ_REQUEST_TYPE 0xc0 117 #define VENDOR_READ_REQUEST 0x01 118 119 #define UART_STATE 0x08 120 #define UART_STATE_TRANSIENT_MASK 0x74 121 #define UART_DCD 0x01 122 #define UART_DSR 0x02 123 #define UART_BREAK_ERROR 0x04 124 #define UART_RING 0x08 125 #define UART_FRAME_ERROR 0x10 126 #define UART_PARITY_ERROR 0x20 127 #define UART_OVERRUN_ERROR 0x40 128 #define UART_CTS 0x80 129 130 131 enum pl2303_type { 132 type_0, /* don't know the difference between type 0 and */ 133 type_1, /* type 1, until someone from prolific tells us... */ 134 HX, /* HX version of the pl2303 chip */ 135 }; 136 137 struct pl2303_serial_private { 138 enum pl2303_type type; 139 }; 140 141 struct pl2303_private { 142 spinlock_t lock; 143 u8 line_control; 144 u8 line_status; 145 }; 146 147 static int pl2303_vendor_read(__u16 value, __u16 index, 148 struct usb_serial *serial, unsigned char *buf) 149 { 150 int res = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0), 151 VENDOR_READ_REQUEST, VENDOR_READ_REQUEST_TYPE, 152 value, index, buf, 1, 100); 153 dev_dbg(&serial->interface->dev, "0x%x:0x%x:0x%x:0x%x %d - %x\n", 154 VENDOR_READ_REQUEST_TYPE, VENDOR_READ_REQUEST, value, index, 155 res, buf[0]); 156 return res; 157 } 158 159 static int pl2303_vendor_write(__u16 value, __u16 index, 160 struct usb_serial *serial) 161 { 162 int res = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), 163 VENDOR_WRITE_REQUEST, VENDOR_WRITE_REQUEST_TYPE, 164 value, index, NULL, 0, 100); 165 dev_dbg(&serial->interface->dev, "0x%x:0x%x:0x%x:0x%x %d\n", 166 VENDOR_WRITE_REQUEST_TYPE, VENDOR_WRITE_REQUEST, value, index, 167 res); 168 return res; 169 } 170 171 static int pl2303_startup(struct usb_serial *serial) 172 { 173 struct pl2303_serial_private *spriv; 174 enum pl2303_type type = type_0; 175 unsigned char *buf; 176 177 spriv = kzalloc(sizeof(*spriv), GFP_KERNEL); 178 if (!spriv) 179 return -ENOMEM; 180 181 buf = kmalloc(10, GFP_KERNEL); 182 if (!buf) { 183 kfree(spriv); 184 return -ENOMEM; 185 } 186 187 if (serial->dev->descriptor.bDeviceClass == 0x02) 188 type = type_0; 189 else if (serial->dev->descriptor.bMaxPacketSize0 == 0x40) 190 type = HX; 191 else if (serial->dev->descriptor.bDeviceClass == 0x00) 192 type = type_1; 193 else if (serial->dev->descriptor.bDeviceClass == 0xFF) 194 type = type_1; 195 dev_dbg(&serial->interface->dev, "device type: %d\n", type); 196 197 spriv->type = type; 198 usb_set_serial_data(serial, spriv); 199 200 pl2303_vendor_read(0x8484, 0, serial, buf); 201 pl2303_vendor_write(0x0404, 0, serial); 202 pl2303_vendor_read(0x8484, 0, serial, buf); 203 pl2303_vendor_read(0x8383, 0, serial, buf); 204 pl2303_vendor_read(0x8484, 0, serial, buf); 205 pl2303_vendor_write(0x0404, 1, serial); 206 pl2303_vendor_read(0x8484, 0, serial, buf); 207 pl2303_vendor_read(0x8383, 0, serial, buf); 208 pl2303_vendor_write(0, 1, serial); 209 pl2303_vendor_write(1, 0, serial); 210 if (type == HX) 211 pl2303_vendor_write(2, 0x44, serial); 212 else 213 pl2303_vendor_write(2, 0x24, serial); 214 215 kfree(buf); 216 return 0; 217 } 218 219 static void pl2303_release(struct usb_serial *serial) 220 { 221 struct pl2303_serial_private *spriv; 222 223 spriv = usb_get_serial_data(serial); 224 kfree(spriv); 225 } 226 227 static int pl2303_port_probe(struct usb_serial_port *port) 228 { 229 struct pl2303_private *priv; 230 231 priv = kzalloc(sizeof(*priv), GFP_KERNEL); 232 if (!priv) 233 return -ENOMEM; 234 235 spin_lock_init(&priv->lock); 236 237 usb_set_serial_port_data(port, priv); 238 239 port->port.drain_delay = 256; 240 241 return 0; 242 } 243 244 static int pl2303_port_remove(struct usb_serial_port *port) 245 { 246 struct pl2303_private *priv; 247 248 priv = usb_get_serial_port_data(port); 249 kfree(priv); 250 251 return 0; 252 } 253 254 static int pl2303_set_control_lines(struct usb_serial_port *port, u8 value) 255 { 256 struct usb_device *dev = port->serial->dev; 257 int retval; 258 259 retval = usb_control_msg(dev, usb_sndctrlpipe(dev, 0), 260 SET_CONTROL_REQUEST, SET_CONTROL_REQUEST_TYPE, 261 value, 0, NULL, 0, 100); 262 dev_dbg(&port->dev, "%s - value = %d, retval = %d\n", __func__, 263 value, retval); 264 return retval; 265 } 266 267 static void pl2303_encode_baudrate(struct tty_struct *tty, 268 struct usb_serial_port *port, 269 u8 buf[4]) 270 { 271 const int baud_sup[] = { 75, 150, 300, 600, 1200, 1800, 2400, 3600, 272 4800, 7200, 9600, 14400, 19200, 28800, 38400, 273 57600, 115200, 230400, 460800, 500000, 614400, 274 921600, 1228800, 2457600, 3000000, 6000000 }; 275 276 struct usb_serial *serial = port->serial; 277 struct pl2303_serial_private *spriv = usb_get_serial_data(serial); 278 int baud; 279 int i; 280 281 /* 282 * NOTE: Only the values defined in baud_sup are supported! 283 * => if unsupported values are set, the PL2303 seems to use 284 * 9600 baud (at least my PL2303X always does) 285 */ 286 baud = tty_get_baud_rate(tty); 287 dev_dbg(&port->dev, "baud requested = %d\n", baud); 288 if (!baud) 289 return; 290 291 /* Set baudrate to nearest supported value */ 292 for (i = 0; i < ARRAY_SIZE(baud_sup); ++i) { 293 if (baud_sup[i] > baud) 294 break; 295 } 296 297 if (i == ARRAY_SIZE(baud_sup)) 298 baud = baud_sup[i - 1]; 299 else if (i > 0 && (baud_sup[i] - baud) > (baud - baud_sup[i - 1])) 300 baud = baud_sup[i - 1]; 301 else 302 baud = baud_sup[i]; 303 304 /* type_0, type_1 only support up to 1228800 baud */ 305 if (spriv->type != HX) 306 baud = min_t(int, baud, 1228800); 307 308 if (baud <= 115200) { 309 put_unaligned_le32(baud, buf); 310 } else { 311 /* 312 * Apparently the formula for higher speeds is: 313 * baudrate = 12M * 32 / (2^buf[1]) / buf[0] 314 */ 315 unsigned tmp = 12000000 * 32 / baud; 316 buf[3] = 0x80; 317 buf[2] = 0; 318 buf[1] = (tmp >= 256); 319 while (tmp >= 256) { 320 tmp >>= 2; 321 buf[1] <<= 1; 322 } 323 buf[0] = tmp; 324 } 325 326 /* Save resulting baud rate */ 327 tty_encode_baud_rate(tty, baud, baud); 328 dev_dbg(&port->dev, "baud set = %d\n", baud); 329 } 330 331 static void pl2303_set_termios(struct tty_struct *tty, 332 struct usb_serial_port *port, struct ktermios *old_termios) 333 { 334 struct usb_serial *serial = port->serial; 335 struct pl2303_serial_private *spriv = usb_get_serial_data(serial); 336 struct pl2303_private *priv = usb_get_serial_port_data(port); 337 unsigned long flags; 338 unsigned char *buf; 339 int i; 340 u8 control; 341 342 /* 343 * The PL2303 is reported to lose bytes if you change serial settings 344 * even to the same values as before. Thus we actually need to filter 345 * in this specific case. 346 */ 347 if (old_termios && !tty_termios_hw_change(&tty->termios, old_termios)) 348 return; 349 350 buf = kzalloc(7, GFP_KERNEL); 351 if (!buf) { 352 dev_err(&port->dev, "%s - out of memory.\n", __func__); 353 /* Report back no change occurred */ 354 if (old_termios) 355 tty->termios = *old_termios; 356 return; 357 } 358 359 i = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0), 360 GET_LINE_REQUEST, GET_LINE_REQUEST_TYPE, 361 0, 0, buf, 7, 100); 362 dev_dbg(&port->dev, "0xa1:0x21:0:0 %d - %7ph\n", i, buf); 363 364 switch (C_CSIZE(tty)) { 365 case CS5: 366 buf[6] = 5; 367 break; 368 case CS6: 369 buf[6] = 6; 370 break; 371 case CS7: 372 buf[6] = 7; 373 break; 374 default: 375 case CS8: 376 buf[6] = 8; 377 } 378 dev_dbg(&port->dev, "data bits = %d\n", buf[6]); 379 380 /* For reference buf[0]:buf[3] baud rate value */ 381 pl2303_encode_baudrate(tty, port, &buf[0]); 382 383 /* For reference buf[4]=0 is 1 stop bits */ 384 /* For reference buf[4]=1 is 1.5 stop bits */ 385 /* For reference buf[4]=2 is 2 stop bits */ 386 if (C_CSTOPB(tty)) { 387 /* 388 * NOTE: Comply with "real" UARTs / RS232: 389 * use 1.5 instead of 2 stop bits with 5 data bits 390 */ 391 if (C_CSIZE(tty) == CS5) { 392 buf[4] = 1; 393 dev_dbg(&port->dev, "stop bits = 1.5\n"); 394 } else { 395 buf[4] = 2; 396 dev_dbg(&port->dev, "stop bits = 2\n"); 397 } 398 } else { 399 buf[4] = 0; 400 dev_dbg(&port->dev, "stop bits = 1\n"); 401 } 402 403 if (C_PARENB(tty)) { 404 /* For reference buf[5]=0 is none parity */ 405 /* For reference buf[5]=1 is odd parity */ 406 /* For reference buf[5]=2 is even parity */ 407 /* For reference buf[5]=3 is mark parity */ 408 /* For reference buf[5]=4 is space parity */ 409 if (C_PARODD(tty)) { 410 if (tty->termios.c_cflag & CMSPAR) { 411 buf[5] = 3; 412 dev_dbg(&port->dev, "parity = mark\n"); 413 } else { 414 buf[5] = 1; 415 dev_dbg(&port->dev, "parity = odd\n"); 416 } 417 } else { 418 if (tty->termios.c_cflag & CMSPAR) { 419 buf[5] = 4; 420 dev_dbg(&port->dev, "parity = space\n"); 421 } else { 422 buf[5] = 2; 423 dev_dbg(&port->dev, "parity = even\n"); 424 } 425 } 426 } else { 427 buf[5] = 0; 428 dev_dbg(&port->dev, "parity = none\n"); 429 } 430 431 i = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), 432 SET_LINE_REQUEST, SET_LINE_REQUEST_TYPE, 433 0, 0, buf, 7, 100); 434 dev_dbg(&port->dev, "0x21:0x20:0:0 %d\n", i); 435 436 /* change control lines if we are switching to or from B0 */ 437 spin_lock_irqsave(&priv->lock, flags); 438 control = priv->line_control; 439 if (C_BAUD(tty) == B0) 440 priv->line_control &= ~(CONTROL_DTR | CONTROL_RTS); 441 else if (old_termios && (old_termios->c_cflag & CBAUD) == B0) 442 priv->line_control |= (CONTROL_DTR | CONTROL_RTS); 443 if (control != priv->line_control) { 444 control = priv->line_control; 445 spin_unlock_irqrestore(&priv->lock, flags); 446 pl2303_set_control_lines(port, control); 447 } else { 448 spin_unlock_irqrestore(&priv->lock, flags); 449 } 450 451 memset(buf, 0, 7); 452 i = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0), 453 GET_LINE_REQUEST, GET_LINE_REQUEST_TYPE, 454 0, 0, buf, 7, 100); 455 dev_dbg(&port->dev, "0xa1:0x21:0:0 %d - %7ph\n", i, buf); 456 457 if (C_CRTSCTS(tty)) { 458 if (spriv->type == HX) 459 pl2303_vendor_write(0x0, 0x61, serial); 460 else 461 pl2303_vendor_write(0x0, 0x41, serial); 462 } else { 463 pl2303_vendor_write(0x0, 0x0, serial); 464 } 465 466 kfree(buf); 467 } 468 469 static void pl2303_dtr_rts(struct usb_serial_port *port, int on) 470 { 471 struct pl2303_private *priv = usb_get_serial_port_data(port); 472 unsigned long flags; 473 u8 control; 474 475 spin_lock_irqsave(&priv->lock, flags); 476 /* Change DTR and RTS */ 477 if (on) 478 priv->line_control |= (CONTROL_DTR | CONTROL_RTS); 479 else 480 priv->line_control &= ~(CONTROL_DTR | CONTROL_RTS); 481 control = priv->line_control; 482 spin_unlock_irqrestore(&priv->lock, flags); 483 pl2303_set_control_lines(port, control); 484 } 485 486 static void pl2303_close(struct usb_serial_port *port) 487 { 488 usb_serial_generic_close(port); 489 usb_kill_urb(port->interrupt_in_urb); 490 } 491 492 static int pl2303_open(struct tty_struct *tty, struct usb_serial_port *port) 493 { 494 struct usb_serial *serial = port->serial; 495 struct pl2303_serial_private *spriv = usb_get_serial_data(serial); 496 int result; 497 498 if (spriv->type != HX) { 499 usb_clear_halt(serial->dev, port->write_urb->pipe); 500 usb_clear_halt(serial->dev, port->read_urb->pipe); 501 } else { 502 /* reset upstream data pipes */ 503 pl2303_vendor_write(8, 0, serial); 504 pl2303_vendor_write(9, 0, serial); 505 } 506 507 /* Setup termios */ 508 if (tty) 509 pl2303_set_termios(tty, port, NULL); 510 511 result = usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL); 512 if (result) { 513 dev_err(&port->dev, "%s - failed submitting interrupt urb," 514 " error %d\n", __func__, result); 515 return result; 516 } 517 518 result = usb_serial_generic_open(tty, port); 519 if (result) { 520 usb_kill_urb(port->interrupt_in_urb); 521 return result; 522 } 523 524 return 0; 525 } 526 527 static int pl2303_tiocmset(struct tty_struct *tty, 528 unsigned int set, unsigned int clear) 529 { 530 struct usb_serial_port *port = tty->driver_data; 531 struct pl2303_private *priv = usb_get_serial_port_data(port); 532 unsigned long flags; 533 u8 control; 534 int ret; 535 536 spin_lock_irqsave(&priv->lock, flags); 537 if (set & TIOCM_RTS) 538 priv->line_control |= CONTROL_RTS; 539 if (set & TIOCM_DTR) 540 priv->line_control |= CONTROL_DTR; 541 if (clear & TIOCM_RTS) 542 priv->line_control &= ~CONTROL_RTS; 543 if (clear & TIOCM_DTR) 544 priv->line_control &= ~CONTROL_DTR; 545 control = priv->line_control; 546 spin_unlock_irqrestore(&priv->lock, flags); 547 548 ret = pl2303_set_control_lines(port, control); 549 if (ret) 550 return usb_translate_errors(ret); 551 552 return 0; 553 } 554 555 static int pl2303_tiocmget(struct tty_struct *tty) 556 { 557 struct usb_serial_port *port = tty->driver_data; 558 struct pl2303_private *priv = usb_get_serial_port_data(port); 559 unsigned long flags; 560 unsigned int mcr; 561 unsigned int status; 562 unsigned int result; 563 564 spin_lock_irqsave(&priv->lock, flags); 565 mcr = priv->line_control; 566 status = priv->line_status; 567 spin_unlock_irqrestore(&priv->lock, flags); 568 569 result = ((mcr & CONTROL_DTR) ? TIOCM_DTR : 0) 570 | ((mcr & CONTROL_RTS) ? TIOCM_RTS : 0) 571 | ((status & UART_CTS) ? TIOCM_CTS : 0) 572 | ((status & UART_DSR) ? TIOCM_DSR : 0) 573 | ((status & UART_RING) ? TIOCM_RI : 0) 574 | ((status & UART_DCD) ? TIOCM_CD : 0); 575 576 dev_dbg(&port->dev, "%s - result = %x\n", __func__, result); 577 578 return result; 579 } 580 581 static int pl2303_carrier_raised(struct usb_serial_port *port) 582 { 583 struct pl2303_private *priv = usb_get_serial_port_data(port); 584 if (priv->line_status & UART_DCD) 585 return 1; 586 return 0; 587 } 588 589 static int pl2303_tiocmiwait(struct tty_struct *tty, unsigned long arg) 590 { 591 struct usb_serial_port *port = tty->driver_data; 592 struct pl2303_private *priv = usb_get_serial_port_data(port); 593 unsigned long flags; 594 unsigned int prevstatus; 595 unsigned int status; 596 unsigned int changed; 597 598 spin_lock_irqsave(&priv->lock, flags); 599 prevstatus = priv->line_status; 600 spin_unlock_irqrestore(&priv->lock, flags); 601 602 while (1) { 603 interruptible_sleep_on(&port->port.delta_msr_wait); 604 /* see if a signal did it */ 605 if (signal_pending(current)) 606 return -ERESTARTSYS; 607 608 if (port->serial->disconnected) 609 return -EIO; 610 611 spin_lock_irqsave(&priv->lock, flags); 612 status = priv->line_status; 613 spin_unlock_irqrestore(&priv->lock, flags); 614 615 changed = prevstatus ^ status; 616 617 if (((arg & TIOCM_RNG) && (changed & UART_RING)) || 618 ((arg & TIOCM_DSR) && (changed & UART_DSR)) || 619 ((arg & TIOCM_CD) && (changed & UART_DCD)) || 620 ((arg & TIOCM_CTS) && (changed & UART_CTS))) { 621 return 0; 622 } 623 prevstatus = status; 624 } 625 /* NOTREACHED */ 626 return 0; 627 } 628 629 static int pl2303_ioctl(struct tty_struct *tty, 630 unsigned int cmd, unsigned long arg) 631 { 632 struct serial_struct ser; 633 struct usb_serial_port *port = tty->driver_data; 634 635 dev_dbg(&port->dev, "%s cmd = 0x%04x\n", __func__, cmd); 636 637 switch (cmd) { 638 case TIOCGSERIAL: 639 memset(&ser, 0, sizeof ser); 640 ser.type = PORT_16654; 641 ser.line = port->minor; 642 ser.port = port->port_number; 643 ser.baud_base = 460800; 644 645 if (copy_to_user((void __user *)arg, &ser, sizeof ser)) 646 return -EFAULT; 647 648 return 0; 649 default: 650 dev_dbg(&port->dev, "%s not supported = 0x%04x\n", __func__, cmd); 651 break; 652 } 653 return -ENOIOCTLCMD; 654 } 655 656 static void pl2303_break_ctl(struct tty_struct *tty, int break_state) 657 { 658 struct usb_serial_port *port = tty->driver_data; 659 struct usb_serial *serial = port->serial; 660 u16 state; 661 int result; 662 663 if (break_state == 0) 664 state = BREAK_OFF; 665 else 666 state = BREAK_ON; 667 dev_dbg(&port->dev, "%s - turning break %s\n", __func__, 668 state == BREAK_OFF ? "off" : "on"); 669 670 result = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), 671 BREAK_REQUEST, BREAK_REQUEST_TYPE, state, 672 0, NULL, 0, 100); 673 if (result) 674 dev_err(&port->dev, "error sending break = %d\n", result); 675 } 676 677 static void pl2303_update_line_status(struct usb_serial_port *port, 678 unsigned char *data, 679 unsigned int actual_length) 680 { 681 682 struct pl2303_private *priv = usb_get_serial_port_data(port); 683 struct tty_struct *tty; 684 unsigned long flags; 685 u8 status_idx = UART_STATE; 686 u8 length = UART_STATE + 1; 687 u8 prev_line_status; 688 u16 idv, idp; 689 690 idv = le16_to_cpu(port->serial->dev->descriptor.idVendor); 691 idp = le16_to_cpu(port->serial->dev->descriptor.idProduct); 692 693 694 if (idv == SIEMENS_VENDOR_ID) { 695 if (idp == SIEMENS_PRODUCT_ID_X65 || 696 idp == SIEMENS_PRODUCT_ID_SX1 || 697 idp == SIEMENS_PRODUCT_ID_X75) { 698 699 length = 1; 700 status_idx = 0; 701 } 702 } 703 704 if (actual_length < length) 705 return; 706 707 /* Save off the uart status for others to look at */ 708 spin_lock_irqsave(&priv->lock, flags); 709 prev_line_status = priv->line_status; 710 priv->line_status = data[status_idx]; 711 spin_unlock_irqrestore(&priv->lock, flags); 712 if (priv->line_status & UART_BREAK_ERROR) 713 usb_serial_handle_break(port); 714 wake_up_interruptible(&port->port.delta_msr_wait); 715 716 tty = tty_port_tty_get(&port->port); 717 if (!tty) 718 return; 719 if ((priv->line_status ^ prev_line_status) & UART_DCD) 720 usb_serial_handle_dcd_change(port, tty, 721 priv->line_status & UART_DCD); 722 tty_kref_put(tty); 723 } 724 725 static void pl2303_read_int_callback(struct urb *urb) 726 { 727 struct usb_serial_port *port = urb->context; 728 unsigned char *data = urb->transfer_buffer; 729 unsigned int actual_length = urb->actual_length; 730 int status = urb->status; 731 int retval; 732 733 switch (status) { 734 case 0: 735 /* success */ 736 break; 737 case -ECONNRESET: 738 case -ENOENT: 739 case -ESHUTDOWN: 740 /* this urb is terminated, clean up */ 741 dev_dbg(&port->dev, "%s - urb shutting down with status: %d\n", 742 __func__, status); 743 return; 744 default: 745 dev_dbg(&port->dev, "%s - nonzero urb status received: %d\n", 746 __func__, status); 747 goto exit; 748 } 749 750 usb_serial_debug_data(&port->dev, __func__, 751 urb->actual_length, urb->transfer_buffer); 752 753 pl2303_update_line_status(port, data, actual_length); 754 755 exit: 756 retval = usb_submit_urb(urb, GFP_ATOMIC); 757 if (retval) 758 dev_err(&port->dev, 759 "%s - usb_submit_urb failed with result %d\n", 760 __func__, retval); 761 } 762 763 static void pl2303_process_read_urb(struct urb *urb) 764 { 765 struct usb_serial_port *port = urb->context; 766 struct pl2303_private *priv = usb_get_serial_port_data(port); 767 unsigned char *data = urb->transfer_buffer; 768 char tty_flag = TTY_NORMAL; 769 unsigned long flags; 770 u8 line_status; 771 int i; 772 773 /* update line status */ 774 spin_lock_irqsave(&priv->lock, flags); 775 line_status = priv->line_status; 776 priv->line_status &= ~UART_STATE_TRANSIENT_MASK; 777 spin_unlock_irqrestore(&priv->lock, flags); 778 wake_up_interruptible(&port->port.delta_msr_wait); 779 780 if (!urb->actual_length) 781 return; 782 783 /* break takes precedence over parity, */ 784 /* which takes precedence over framing errors */ 785 if (line_status & UART_BREAK_ERROR) 786 tty_flag = TTY_BREAK; 787 else if (line_status & UART_PARITY_ERROR) 788 tty_flag = TTY_PARITY; 789 else if (line_status & UART_FRAME_ERROR) 790 tty_flag = TTY_FRAME; 791 792 if (tty_flag != TTY_NORMAL) 793 dev_dbg(&port->dev, "%s - tty_flag = %d\n", __func__, 794 tty_flag); 795 /* overrun is special, not associated with a char */ 796 if (line_status & UART_OVERRUN_ERROR) 797 tty_insert_flip_char(&port->port, 0, TTY_OVERRUN); 798 799 if (port->port.console && port->sysrq) { 800 for (i = 0; i < urb->actual_length; ++i) 801 if (!usb_serial_handle_sysrq_char(port, data[i])) 802 tty_insert_flip_char(&port->port, data[i], 803 tty_flag); 804 } else { 805 tty_insert_flip_string_fixed_flag(&port->port, data, tty_flag, 806 urb->actual_length); 807 } 808 809 tty_flip_buffer_push(&port->port); 810 } 811 812 /* All of the device info needed for the PL2303 SIO serial converter */ 813 static struct usb_serial_driver pl2303_device = { 814 .driver = { 815 .owner = THIS_MODULE, 816 .name = "pl2303", 817 }, 818 .id_table = id_table, 819 .num_ports = 1, 820 .bulk_in_size = 256, 821 .bulk_out_size = 256, 822 .open = pl2303_open, 823 .close = pl2303_close, 824 .dtr_rts = pl2303_dtr_rts, 825 .carrier_raised = pl2303_carrier_raised, 826 .ioctl = pl2303_ioctl, 827 .break_ctl = pl2303_break_ctl, 828 .set_termios = pl2303_set_termios, 829 .tiocmget = pl2303_tiocmget, 830 .tiocmset = pl2303_tiocmset, 831 .tiocmiwait = pl2303_tiocmiwait, 832 .process_read_urb = pl2303_process_read_urb, 833 .read_int_callback = pl2303_read_int_callback, 834 .attach = pl2303_startup, 835 .release = pl2303_release, 836 .port_probe = pl2303_port_probe, 837 .port_remove = pl2303_port_remove, 838 }; 839 840 static struct usb_serial_driver * const serial_drivers[] = { 841 &pl2303_device, NULL 842 }; 843 844 module_usb_serial_driver(serial_drivers, id_table); 845 846 MODULE_DESCRIPTION(DRIVER_DESC); 847 MODULE_LICENSE("GPL"); 848