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 if (C_CSIZE(tty)) { 365 switch (C_CSIZE(tty)) { 366 case CS5: 367 buf[6] = 5; 368 break; 369 case CS6: 370 buf[6] = 6; 371 break; 372 case CS7: 373 buf[6] = 7; 374 break; 375 default: 376 case CS8: 377 buf[6] = 8; 378 } 379 dev_dbg(&port->dev, "data bits = %d\n", buf[6]); 380 } 381 382 /* For reference buf[0]:buf[3] baud rate value */ 383 pl2303_encode_baudrate(tty, port, &buf[0]); 384 385 /* For reference buf[4]=0 is 1 stop bits */ 386 /* For reference buf[4]=1 is 1.5 stop bits */ 387 /* For reference buf[4]=2 is 2 stop bits */ 388 if (C_CSTOPB(tty)) { 389 /* 390 * NOTE: Comply with "real" UARTs / RS232: 391 * use 1.5 instead of 2 stop bits with 5 data bits 392 */ 393 if (C_CSIZE(tty) == CS5) { 394 buf[4] = 1; 395 dev_dbg(&port->dev, "stop bits = 1.5\n"); 396 } else { 397 buf[4] = 2; 398 dev_dbg(&port->dev, "stop bits = 2\n"); 399 } 400 } else { 401 buf[4] = 0; 402 dev_dbg(&port->dev, "stop bits = 1\n"); 403 } 404 405 if (C_PARENB(tty)) { 406 /* For reference buf[5]=0 is none parity */ 407 /* For reference buf[5]=1 is odd parity */ 408 /* For reference buf[5]=2 is even parity */ 409 /* For reference buf[5]=3 is mark parity */ 410 /* For reference buf[5]=4 is space parity */ 411 if (C_PARODD(tty)) { 412 if (tty->termios.c_cflag & CMSPAR) { 413 buf[5] = 3; 414 dev_dbg(&port->dev, "parity = mark\n"); 415 } else { 416 buf[5] = 1; 417 dev_dbg(&port->dev, "parity = odd\n"); 418 } 419 } else { 420 if (tty->termios.c_cflag & CMSPAR) { 421 buf[5] = 4; 422 dev_dbg(&port->dev, "parity = space\n"); 423 } else { 424 buf[5] = 2; 425 dev_dbg(&port->dev, "parity = even\n"); 426 } 427 } 428 } else { 429 buf[5] = 0; 430 dev_dbg(&port->dev, "parity = none\n"); 431 } 432 433 i = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), 434 SET_LINE_REQUEST, SET_LINE_REQUEST_TYPE, 435 0, 0, buf, 7, 100); 436 dev_dbg(&port->dev, "0x21:0x20:0:0 %d\n", i); 437 438 /* change control lines if we are switching to or from B0 */ 439 spin_lock_irqsave(&priv->lock, flags); 440 control = priv->line_control; 441 if (C_BAUD(tty) == B0) 442 priv->line_control &= ~(CONTROL_DTR | CONTROL_RTS); 443 else if (old_termios && (old_termios->c_cflag & CBAUD) == B0) 444 priv->line_control |= (CONTROL_DTR | CONTROL_RTS); 445 if (control != priv->line_control) { 446 control = priv->line_control; 447 spin_unlock_irqrestore(&priv->lock, flags); 448 pl2303_set_control_lines(port, control); 449 } else { 450 spin_unlock_irqrestore(&priv->lock, flags); 451 } 452 453 memset(buf, 0, 7); 454 i = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0), 455 GET_LINE_REQUEST, GET_LINE_REQUEST_TYPE, 456 0, 0, buf, 7, 100); 457 dev_dbg(&port->dev, "0xa1:0x21:0:0 %d - %7ph\n", i, buf); 458 459 if (C_CRTSCTS(tty)) { 460 if (spriv->type == HX) 461 pl2303_vendor_write(0x0, 0x61, serial); 462 else 463 pl2303_vendor_write(0x0, 0x41, serial); 464 } else { 465 pl2303_vendor_write(0x0, 0x0, serial); 466 } 467 468 kfree(buf); 469 } 470 471 static void pl2303_dtr_rts(struct usb_serial_port *port, int on) 472 { 473 struct pl2303_private *priv = usb_get_serial_port_data(port); 474 unsigned long flags; 475 u8 control; 476 477 spin_lock_irqsave(&priv->lock, flags); 478 /* Change DTR and RTS */ 479 if (on) 480 priv->line_control |= (CONTROL_DTR | CONTROL_RTS); 481 else 482 priv->line_control &= ~(CONTROL_DTR | CONTROL_RTS); 483 control = priv->line_control; 484 spin_unlock_irqrestore(&priv->lock, flags); 485 pl2303_set_control_lines(port, control); 486 } 487 488 static void pl2303_close(struct usb_serial_port *port) 489 { 490 usb_serial_generic_close(port); 491 usb_kill_urb(port->interrupt_in_urb); 492 } 493 494 static int pl2303_open(struct tty_struct *tty, struct usb_serial_port *port) 495 { 496 struct usb_serial *serial = port->serial; 497 struct pl2303_serial_private *spriv = usb_get_serial_data(serial); 498 int result; 499 500 if (spriv->type != HX) { 501 usb_clear_halt(serial->dev, port->write_urb->pipe); 502 usb_clear_halt(serial->dev, port->read_urb->pipe); 503 } else { 504 /* reset upstream data pipes */ 505 pl2303_vendor_write(8, 0, serial); 506 pl2303_vendor_write(9, 0, serial); 507 } 508 509 /* Setup termios */ 510 if (tty) 511 pl2303_set_termios(tty, port, NULL); 512 513 result = usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL); 514 if (result) { 515 dev_err(&port->dev, "%s - failed submitting interrupt urb," 516 " error %d\n", __func__, result); 517 return result; 518 } 519 520 result = usb_serial_generic_open(tty, port); 521 if (result) { 522 usb_kill_urb(port->interrupt_in_urb); 523 return result; 524 } 525 526 return 0; 527 } 528 529 static int pl2303_tiocmset(struct tty_struct *tty, 530 unsigned int set, unsigned int clear) 531 { 532 struct usb_serial_port *port = tty->driver_data; 533 struct pl2303_private *priv = usb_get_serial_port_data(port); 534 unsigned long flags; 535 u8 control; 536 int ret; 537 538 spin_lock_irqsave(&priv->lock, flags); 539 if (set & TIOCM_RTS) 540 priv->line_control |= CONTROL_RTS; 541 if (set & TIOCM_DTR) 542 priv->line_control |= CONTROL_DTR; 543 if (clear & TIOCM_RTS) 544 priv->line_control &= ~CONTROL_RTS; 545 if (clear & TIOCM_DTR) 546 priv->line_control &= ~CONTROL_DTR; 547 control = priv->line_control; 548 spin_unlock_irqrestore(&priv->lock, flags); 549 550 ret = pl2303_set_control_lines(port, control); 551 if (ret) 552 return usb_translate_errors(ret); 553 554 return 0; 555 } 556 557 static int pl2303_tiocmget(struct tty_struct *tty) 558 { 559 struct usb_serial_port *port = tty->driver_data; 560 struct pl2303_private *priv = usb_get_serial_port_data(port); 561 unsigned long flags; 562 unsigned int mcr; 563 unsigned int status; 564 unsigned int result; 565 566 spin_lock_irqsave(&priv->lock, flags); 567 mcr = priv->line_control; 568 status = priv->line_status; 569 spin_unlock_irqrestore(&priv->lock, flags); 570 571 result = ((mcr & CONTROL_DTR) ? TIOCM_DTR : 0) 572 | ((mcr & CONTROL_RTS) ? TIOCM_RTS : 0) 573 | ((status & UART_CTS) ? TIOCM_CTS : 0) 574 | ((status & UART_DSR) ? TIOCM_DSR : 0) 575 | ((status & UART_RING) ? TIOCM_RI : 0) 576 | ((status & UART_DCD) ? TIOCM_CD : 0); 577 578 dev_dbg(&port->dev, "%s - result = %x\n", __func__, result); 579 580 return result; 581 } 582 583 static int pl2303_carrier_raised(struct usb_serial_port *port) 584 { 585 struct pl2303_private *priv = usb_get_serial_port_data(port); 586 if (priv->line_status & UART_DCD) 587 return 1; 588 return 0; 589 } 590 591 static int pl2303_tiocmiwait(struct tty_struct *tty, unsigned long arg) 592 { 593 struct usb_serial_port *port = tty->driver_data; 594 struct pl2303_private *priv = usb_get_serial_port_data(port); 595 unsigned long flags; 596 unsigned int prevstatus; 597 unsigned int status; 598 unsigned int changed; 599 600 spin_lock_irqsave(&priv->lock, flags); 601 prevstatus = priv->line_status; 602 spin_unlock_irqrestore(&priv->lock, flags); 603 604 while (1) { 605 interruptible_sleep_on(&port->port.delta_msr_wait); 606 /* see if a signal did it */ 607 if (signal_pending(current)) 608 return -ERESTARTSYS; 609 610 if (port->serial->disconnected) 611 return -EIO; 612 613 spin_lock_irqsave(&priv->lock, flags); 614 status = priv->line_status; 615 spin_unlock_irqrestore(&priv->lock, flags); 616 617 changed = prevstatus ^ status; 618 619 if (((arg & TIOCM_RNG) && (changed & UART_RING)) || 620 ((arg & TIOCM_DSR) && (changed & UART_DSR)) || 621 ((arg & TIOCM_CD) && (changed & UART_DCD)) || 622 ((arg & TIOCM_CTS) && (changed & UART_CTS))) { 623 return 0; 624 } 625 prevstatus = status; 626 } 627 /* NOTREACHED */ 628 return 0; 629 } 630 631 static int pl2303_ioctl(struct tty_struct *tty, 632 unsigned int cmd, unsigned long arg) 633 { 634 struct serial_struct ser; 635 struct usb_serial_port *port = tty->driver_data; 636 637 dev_dbg(&port->dev, "%s cmd = 0x%04x\n", __func__, cmd); 638 639 switch (cmd) { 640 case TIOCGSERIAL: 641 memset(&ser, 0, sizeof ser); 642 ser.type = PORT_16654; 643 ser.line = port->minor; 644 ser.port = port->port_number; 645 ser.baud_base = 460800; 646 647 if (copy_to_user((void __user *)arg, &ser, sizeof ser)) 648 return -EFAULT; 649 650 return 0; 651 default: 652 dev_dbg(&port->dev, "%s not supported = 0x%04x\n", __func__, cmd); 653 break; 654 } 655 return -ENOIOCTLCMD; 656 } 657 658 static void pl2303_break_ctl(struct tty_struct *tty, int break_state) 659 { 660 struct usb_serial_port *port = tty->driver_data; 661 struct usb_serial *serial = port->serial; 662 u16 state; 663 int result; 664 665 if (break_state == 0) 666 state = BREAK_OFF; 667 else 668 state = BREAK_ON; 669 dev_dbg(&port->dev, "%s - turning break %s\n", __func__, 670 state == BREAK_OFF ? "off" : "on"); 671 672 result = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), 673 BREAK_REQUEST, BREAK_REQUEST_TYPE, state, 674 0, NULL, 0, 100); 675 if (result) 676 dev_err(&port->dev, "error sending break = %d\n", result); 677 } 678 679 static void pl2303_update_line_status(struct usb_serial_port *port, 680 unsigned char *data, 681 unsigned int actual_length) 682 { 683 684 struct pl2303_private *priv = usb_get_serial_port_data(port); 685 struct tty_struct *tty; 686 unsigned long flags; 687 u8 status_idx = UART_STATE; 688 u8 length = UART_STATE + 1; 689 u8 prev_line_status; 690 u16 idv, idp; 691 692 idv = le16_to_cpu(port->serial->dev->descriptor.idVendor); 693 idp = le16_to_cpu(port->serial->dev->descriptor.idProduct); 694 695 696 if (idv == SIEMENS_VENDOR_ID) { 697 if (idp == SIEMENS_PRODUCT_ID_X65 || 698 idp == SIEMENS_PRODUCT_ID_SX1 || 699 idp == SIEMENS_PRODUCT_ID_X75) { 700 701 length = 1; 702 status_idx = 0; 703 } 704 } 705 706 if (actual_length < length) 707 return; 708 709 /* Save off the uart status for others to look at */ 710 spin_lock_irqsave(&priv->lock, flags); 711 prev_line_status = priv->line_status; 712 priv->line_status = data[status_idx]; 713 spin_unlock_irqrestore(&priv->lock, flags); 714 if (priv->line_status & UART_BREAK_ERROR) 715 usb_serial_handle_break(port); 716 wake_up_interruptible(&port->port.delta_msr_wait); 717 718 tty = tty_port_tty_get(&port->port); 719 if (!tty) 720 return; 721 if ((priv->line_status ^ prev_line_status) & UART_DCD) 722 usb_serial_handle_dcd_change(port, tty, 723 priv->line_status & UART_DCD); 724 tty_kref_put(tty); 725 } 726 727 static void pl2303_read_int_callback(struct urb *urb) 728 { 729 struct usb_serial_port *port = urb->context; 730 unsigned char *data = urb->transfer_buffer; 731 unsigned int actual_length = urb->actual_length; 732 int status = urb->status; 733 int retval; 734 735 switch (status) { 736 case 0: 737 /* success */ 738 break; 739 case -ECONNRESET: 740 case -ENOENT: 741 case -ESHUTDOWN: 742 /* this urb is terminated, clean up */ 743 dev_dbg(&port->dev, "%s - urb shutting down with status: %d\n", 744 __func__, status); 745 return; 746 default: 747 dev_dbg(&port->dev, "%s - nonzero urb status received: %d\n", 748 __func__, status); 749 goto exit; 750 } 751 752 usb_serial_debug_data(&port->dev, __func__, 753 urb->actual_length, urb->transfer_buffer); 754 755 pl2303_update_line_status(port, data, actual_length); 756 757 exit: 758 retval = usb_submit_urb(urb, GFP_ATOMIC); 759 if (retval) 760 dev_err(&port->dev, 761 "%s - usb_submit_urb failed with result %d\n", 762 __func__, retval); 763 } 764 765 static void pl2303_process_read_urb(struct urb *urb) 766 { 767 struct usb_serial_port *port = urb->context; 768 struct pl2303_private *priv = usb_get_serial_port_data(port); 769 unsigned char *data = urb->transfer_buffer; 770 char tty_flag = TTY_NORMAL; 771 unsigned long flags; 772 u8 line_status; 773 int i; 774 775 /* update line status */ 776 spin_lock_irqsave(&priv->lock, flags); 777 line_status = priv->line_status; 778 priv->line_status &= ~UART_STATE_TRANSIENT_MASK; 779 spin_unlock_irqrestore(&priv->lock, flags); 780 wake_up_interruptible(&port->port.delta_msr_wait); 781 782 if (!urb->actual_length) 783 return; 784 785 /* break takes precedence over parity, */ 786 /* which takes precedence over framing errors */ 787 if (line_status & UART_BREAK_ERROR) 788 tty_flag = TTY_BREAK; 789 else if (line_status & UART_PARITY_ERROR) 790 tty_flag = TTY_PARITY; 791 else if (line_status & UART_FRAME_ERROR) 792 tty_flag = TTY_FRAME; 793 794 if (tty_flag != TTY_NORMAL) 795 dev_dbg(&port->dev, "%s - tty_flag = %d\n", __func__, 796 tty_flag); 797 /* overrun is special, not associated with a char */ 798 if (line_status & UART_OVERRUN_ERROR) 799 tty_insert_flip_char(&port->port, 0, TTY_OVERRUN); 800 801 if (port->port.console && port->sysrq) { 802 for (i = 0; i < urb->actual_length; ++i) 803 if (!usb_serial_handle_sysrq_char(port, data[i])) 804 tty_insert_flip_char(&port->port, data[i], 805 tty_flag); 806 } else { 807 tty_insert_flip_string_fixed_flag(&port->port, data, tty_flag, 808 urb->actual_length); 809 } 810 811 tty_flip_buffer_push(&port->port); 812 } 813 814 /* All of the device info needed for the PL2303 SIO serial converter */ 815 static struct usb_serial_driver pl2303_device = { 816 .driver = { 817 .owner = THIS_MODULE, 818 .name = "pl2303", 819 }, 820 .id_table = id_table, 821 .num_ports = 1, 822 .bulk_in_size = 256, 823 .bulk_out_size = 256, 824 .open = pl2303_open, 825 .close = pl2303_close, 826 .dtr_rts = pl2303_dtr_rts, 827 .carrier_raised = pl2303_carrier_raised, 828 .ioctl = pl2303_ioctl, 829 .break_ctl = pl2303_break_ctl, 830 .set_termios = pl2303_set_termios, 831 .tiocmget = pl2303_tiocmget, 832 .tiocmset = pl2303_tiocmset, 833 .tiocmiwait = pl2303_tiocmiwait, 834 .process_read_urb = pl2303_process_read_urb, 835 .read_int_callback = pl2303_read_int_callback, 836 .attach = pl2303_startup, 837 .release = pl2303_release, 838 .port_probe = pl2303_port_probe, 839 .port_remove = pl2303_port_remove, 840 }; 841 842 static struct usb_serial_driver * const serial_drivers[] = { 843 &pl2303_device, NULL 844 }; 845 846 module_usb_serial_driver(serial_drivers, id_table); 847 848 MODULE_DESCRIPTION(DRIVER_DESC); 849 MODULE_LICENSE("GPL"); 850