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 "pl2303.h" 33 34 /* 35 * Version Information 36 */ 37 #define DRIVER_DESC "Prolific PL2303 USB to serial adaptor driver" 38 39 static const struct usb_device_id id_table[] = { 40 { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID) }, 41 { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_RSAQ2) }, 42 { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_DCU11) }, 43 { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_RSAQ3) }, 44 { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_PHAROS) }, 45 { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_ALDIGA) }, 46 { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_MMX) }, 47 { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_GPRS) }, 48 { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_HCR331) }, 49 { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_MOTOROLA) }, 50 { USB_DEVICE(IODATA_VENDOR_ID, IODATA_PRODUCT_ID) }, 51 { USB_DEVICE(IODATA_VENDOR_ID, IODATA_PRODUCT_ID_RSAQ5) }, 52 { USB_DEVICE(ATEN_VENDOR_ID, ATEN_PRODUCT_ID) }, 53 { USB_DEVICE(ATEN_VENDOR_ID2, ATEN_PRODUCT_ID) }, 54 { USB_DEVICE(ELCOM_VENDOR_ID, ELCOM_PRODUCT_ID) }, 55 { USB_DEVICE(ELCOM_VENDOR_ID, ELCOM_PRODUCT_ID_UCSGT) }, 56 { USB_DEVICE(ITEGNO_VENDOR_ID, ITEGNO_PRODUCT_ID) }, 57 { USB_DEVICE(ITEGNO_VENDOR_ID, ITEGNO_PRODUCT_ID_2080) }, 58 { USB_DEVICE(MA620_VENDOR_ID, MA620_PRODUCT_ID) }, 59 { USB_DEVICE(RATOC_VENDOR_ID, RATOC_PRODUCT_ID) }, 60 { USB_DEVICE(TRIPP_VENDOR_ID, TRIPP_PRODUCT_ID) }, 61 { USB_DEVICE(RADIOSHACK_VENDOR_ID, RADIOSHACK_PRODUCT_ID) }, 62 { USB_DEVICE(DCU10_VENDOR_ID, DCU10_PRODUCT_ID) }, 63 { USB_DEVICE(SITECOM_VENDOR_ID, SITECOM_PRODUCT_ID) }, 64 { USB_DEVICE(ALCATEL_VENDOR_ID, ALCATEL_PRODUCT_ID) }, 65 { USB_DEVICE(SAMSUNG_VENDOR_ID, SAMSUNG_PRODUCT_ID) }, 66 { USB_DEVICE(SIEMENS_VENDOR_ID, SIEMENS_PRODUCT_ID_SX1) }, 67 { USB_DEVICE(SIEMENS_VENDOR_ID, SIEMENS_PRODUCT_ID_X65) }, 68 { USB_DEVICE(SIEMENS_VENDOR_ID, SIEMENS_PRODUCT_ID_X75) }, 69 { USB_DEVICE(SIEMENS_VENDOR_ID, SIEMENS_PRODUCT_ID_EF81) }, 70 { USB_DEVICE(BENQ_VENDOR_ID, BENQ_PRODUCT_ID_S81) }, /* Benq/Siemens S81 */ 71 { USB_DEVICE(SYNTECH_VENDOR_ID, SYNTECH_PRODUCT_ID) }, 72 { USB_DEVICE(NOKIA_CA42_VENDOR_ID, NOKIA_CA42_PRODUCT_ID) }, 73 { USB_DEVICE(CA_42_CA42_VENDOR_ID, CA_42_CA42_PRODUCT_ID) }, 74 { USB_DEVICE(SAGEM_VENDOR_ID, SAGEM_PRODUCT_ID) }, 75 { USB_DEVICE(LEADTEK_VENDOR_ID, LEADTEK_9531_PRODUCT_ID) }, 76 { USB_DEVICE(SPEEDDRAGON_VENDOR_ID, SPEEDDRAGON_PRODUCT_ID) }, 77 { USB_DEVICE(DATAPILOT_U2_VENDOR_ID, DATAPILOT_U2_PRODUCT_ID) }, 78 { USB_DEVICE(BELKIN_VENDOR_ID, BELKIN_PRODUCT_ID) }, 79 { USB_DEVICE(ALCOR_VENDOR_ID, ALCOR_PRODUCT_ID) }, 80 { USB_DEVICE(WS002IN_VENDOR_ID, WS002IN_PRODUCT_ID) }, 81 { USB_DEVICE(COREGA_VENDOR_ID, COREGA_PRODUCT_ID) }, 82 { USB_DEVICE(YCCABLE_VENDOR_ID, YCCABLE_PRODUCT_ID) }, 83 { USB_DEVICE(SUPERIAL_VENDOR_ID, SUPERIAL_PRODUCT_ID) }, 84 { USB_DEVICE(HP_VENDOR_ID, HP_LD220_PRODUCT_ID) }, 85 { USB_DEVICE(CRESSI_VENDOR_ID, CRESSI_EDY_PRODUCT_ID) }, 86 { USB_DEVICE(ZEAGLE_VENDOR_ID, ZEAGLE_N2ITION3_PRODUCT_ID) }, 87 { USB_DEVICE(SONY_VENDOR_ID, SONY_QN3USB_PRODUCT_ID) }, 88 { USB_DEVICE(SANWA_VENDOR_ID, SANWA_PRODUCT_ID) }, 89 { USB_DEVICE(ADLINK_VENDOR_ID, ADLINK_ND6530_PRODUCT_ID) }, 90 { USB_DEVICE(SMART_VENDOR_ID, SMART_PRODUCT_ID) }, 91 { } /* Terminating entry */ 92 }; 93 94 MODULE_DEVICE_TABLE(usb, id_table); 95 96 #define SET_LINE_REQUEST_TYPE 0x21 97 #define SET_LINE_REQUEST 0x20 98 99 #define SET_CONTROL_REQUEST_TYPE 0x21 100 #define SET_CONTROL_REQUEST 0x22 101 #define CONTROL_DTR 0x01 102 #define CONTROL_RTS 0x02 103 104 #define BREAK_REQUEST_TYPE 0x21 105 #define BREAK_REQUEST 0x23 106 #define BREAK_ON 0xffff 107 #define BREAK_OFF 0x0000 108 109 #define GET_LINE_REQUEST_TYPE 0xa1 110 #define GET_LINE_REQUEST 0x21 111 112 #define VENDOR_WRITE_REQUEST_TYPE 0x40 113 #define VENDOR_WRITE_REQUEST 0x01 114 115 #define VENDOR_READ_REQUEST_TYPE 0xc0 116 #define VENDOR_READ_REQUEST 0x01 117 118 #define UART_STATE 0x08 119 #define UART_STATE_TRANSIENT_MASK 0x74 120 #define UART_DCD 0x01 121 #define UART_DSR 0x02 122 #define UART_BREAK_ERROR 0x04 123 #define UART_RING 0x08 124 #define UART_FRAME_ERROR 0x10 125 #define UART_PARITY_ERROR 0x20 126 #define UART_OVERRUN_ERROR 0x40 127 #define UART_CTS 0x80 128 129 130 enum pl2303_type { 131 type_0, /* don't know the difference between type 0 and */ 132 type_1, /* type 1, until someone from prolific tells us... */ 133 HX, /* HX version of the pl2303 chip */ 134 }; 135 136 struct pl2303_serial_private { 137 enum pl2303_type type; 138 }; 139 140 struct pl2303_private { 141 spinlock_t lock; 142 u8 line_control; 143 u8 line_status; 144 }; 145 146 static int pl2303_vendor_read(__u16 value, __u16 index, 147 struct usb_serial *serial, unsigned char *buf) 148 { 149 int res = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0), 150 VENDOR_READ_REQUEST, VENDOR_READ_REQUEST_TYPE, 151 value, index, buf, 1, 100); 152 dev_dbg(&serial->interface->dev, "0x%x:0x%x:0x%x:0x%x %d - %x\n", 153 VENDOR_READ_REQUEST_TYPE, VENDOR_READ_REQUEST, value, index, 154 res, buf[0]); 155 return res; 156 } 157 158 static int pl2303_vendor_write(__u16 value, __u16 index, 159 struct usb_serial *serial) 160 { 161 int res = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), 162 VENDOR_WRITE_REQUEST, VENDOR_WRITE_REQUEST_TYPE, 163 value, index, NULL, 0, 100); 164 dev_dbg(&serial->interface->dev, "0x%x:0x%x:0x%x:0x%x %d\n", 165 VENDOR_WRITE_REQUEST_TYPE, VENDOR_WRITE_REQUEST, value, index, 166 res); 167 return res; 168 } 169 170 static int pl2303_startup(struct usb_serial *serial) 171 { 172 struct pl2303_serial_private *spriv; 173 enum pl2303_type type = type_0; 174 unsigned char *buf; 175 176 spriv = kzalloc(sizeof(*spriv), GFP_KERNEL); 177 if (!spriv) 178 return -ENOMEM; 179 180 buf = kmalloc(10, GFP_KERNEL); 181 if (!buf) { 182 kfree(spriv); 183 return -ENOMEM; 184 } 185 186 if (serial->dev->descriptor.bDeviceClass == 0x02) 187 type = type_0; 188 else if (serial->dev->descriptor.bMaxPacketSize0 == 0x40) 189 type = HX; 190 else if (serial->dev->descriptor.bDeviceClass == 0x00) 191 type = type_1; 192 else if (serial->dev->descriptor.bDeviceClass == 0xFF) 193 type = type_1; 194 dev_dbg(&serial->interface->dev, "device type: %d\n", type); 195 196 spriv->type = type; 197 usb_set_serial_data(serial, spriv); 198 199 pl2303_vendor_read(0x8484, 0, serial, buf); 200 pl2303_vendor_write(0x0404, 0, serial); 201 pl2303_vendor_read(0x8484, 0, serial, buf); 202 pl2303_vendor_read(0x8383, 0, serial, buf); 203 pl2303_vendor_read(0x8484, 0, serial, buf); 204 pl2303_vendor_write(0x0404, 1, serial); 205 pl2303_vendor_read(0x8484, 0, serial, buf); 206 pl2303_vendor_read(0x8383, 0, serial, buf); 207 pl2303_vendor_write(0, 1, serial); 208 pl2303_vendor_write(1, 0, serial); 209 if (type == HX) 210 pl2303_vendor_write(2, 0x44, serial); 211 else 212 pl2303_vendor_write(2, 0x24, serial); 213 214 kfree(buf); 215 return 0; 216 } 217 218 static void pl2303_release(struct usb_serial *serial) 219 { 220 struct pl2303_serial_private *spriv; 221 222 spriv = usb_get_serial_data(serial); 223 kfree(spriv); 224 } 225 226 static int pl2303_port_probe(struct usb_serial_port *port) 227 { 228 struct pl2303_private *priv; 229 230 priv = kzalloc(sizeof(*priv), GFP_KERNEL); 231 if (!priv) 232 return -ENOMEM; 233 234 spin_lock_init(&priv->lock); 235 236 usb_set_serial_port_data(port, priv); 237 238 return 0; 239 } 240 241 static int pl2303_port_remove(struct usb_serial_port *port) 242 { 243 struct pl2303_private *priv; 244 245 priv = usb_get_serial_port_data(port); 246 kfree(priv); 247 248 return 0; 249 } 250 251 static int pl2303_set_control_lines(struct usb_serial_port *port, u8 value) 252 { 253 struct usb_device *dev = port->serial->dev; 254 int retval; 255 256 retval = usb_control_msg(dev, usb_sndctrlpipe(dev, 0), 257 SET_CONTROL_REQUEST, SET_CONTROL_REQUEST_TYPE, 258 value, 0, NULL, 0, 100); 259 dev_dbg(&port->dev, "%s - value = %d, retval = %d\n", __func__, 260 value, retval); 261 return retval; 262 } 263 264 static void pl2303_set_termios(struct tty_struct *tty, 265 struct usb_serial_port *port, struct ktermios *old_termios) 266 { 267 struct usb_serial *serial = port->serial; 268 struct pl2303_serial_private *spriv = usb_get_serial_data(serial); 269 struct pl2303_private *priv = usb_get_serial_port_data(port); 270 unsigned long flags; 271 unsigned int cflag; 272 unsigned char *buf; 273 int baud; 274 int i; 275 u8 control; 276 const int baud_sup[] = { 75, 150, 300, 600, 1200, 1800, 2400, 3600, 277 4800, 7200, 9600, 14400, 19200, 28800, 38400, 278 57600, 115200, 230400, 460800, 500000, 614400, 279 921600, 1228800, 2457600, 3000000, 6000000 }; 280 int baud_floor, baud_ceil; 281 int k; 282 283 /* The PL2303 is reported to lose bytes if you change 284 serial settings even to the same values as before. Thus 285 we actually need to filter in this specific case */ 286 287 if (old_termios && !tty_termios_hw_change(&tty->termios, old_termios)) 288 return; 289 290 cflag = tty->termios.c_cflag; 291 292 buf = kzalloc(7, GFP_KERNEL); 293 if (!buf) { 294 dev_err(&port->dev, "%s - out of memory.\n", __func__); 295 /* Report back no change occurred */ 296 if (old_termios) 297 tty->termios = *old_termios; 298 return; 299 } 300 301 i = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0), 302 GET_LINE_REQUEST, GET_LINE_REQUEST_TYPE, 303 0, 0, buf, 7, 100); 304 dev_dbg(&port->dev, "0xa1:0x21:0:0 %d - %7ph\n", i, buf); 305 306 if (cflag & CSIZE) { 307 switch (cflag & CSIZE) { 308 case CS5: 309 buf[6] = 5; 310 break; 311 case CS6: 312 buf[6] = 6; 313 break; 314 case CS7: 315 buf[6] = 7; 316 break; 317 default: 318 case CS8: 319 buf[6] = 8; 320 break; 321 } 322 dev_dbg(&port->dev, "data bits = %d\n", buf[6]); 323 } 324 325 /* For reference buf[0]:buf[3] baud rate value */ 326 /* NOTE: Only the values defined in baud_sup are supported ! 327 * => if unsupported values are set, the PL2303 seems to use 328 * 9600 baud (at least my PL2303X always does) 329 */ 330 baud = tty_get_baud_rate(tty); 331 dev_dbg(&port->dev, "baud requested = %d\n", baud); 332 if (baud) { 333 /* Set baudrate to nearest supported value */ 334 for (k=0; k<ARRAY_SIZE(baud_sup); k++) { 335 if (baud_sup[k] / baud) { 336 baud_ceil = baud_sup[k]; 337 if (k==0) { 338 baud = baud_ceil; 339 } else { 340 baud_floor = baud_sup[k-1]; 341 if ((baud_ceil % baud) 342 > (baud % baud_floor)) 343 baud = baud_floor; 344 else 345 baud = baud_ceil; 346 } 347 break; 348 } 349 } 350 if (baud > 1228800) { 351 /* type_0, type_1 only support up to 1228800 baud */ 352 if (spriv->type != HX) 353 baud = 1228800; 354 else if (baud > 6000000) 355 baud = 6000000; 356 } 357 dev_dbg(&port->dev, "baud set = %d\n", baud); 358 if (baud <= 115200) { 359 buf[0] = baud & 0xff; 360 buf[1] = (baud >> 8) & 0xff; 361 buf[2] = (baud >> 16) & 0xff; 362 buf[3] = (baud >> 24) & 0xff; 363 } else { 364 /* apparently the formula for higher speeds is: 365 * baudrate = 12M * 32 / (2^buf[1]) / buf[0] 366 */ 367 unsigned tmp = 12*1000*1000*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 } 378 379 /* For reference buf[4]=0 is 1 stop bits */ 380 /* For reference buf[4]=1 is 1.5 stop bits */ 381 /* For reference buf[4]=2 is 2 stop bits */ 382 if (cflag & CSTOPB) { 383 /* NOTE: Comply with "real" UARTs / RS232: 384 * use 1.5 instead of 2 stop bits with 5 data bits 385 */ 386 if ((cflag & CSIZE) == CS5) { 387 buf[4] = 1; 388 dev_dbg(&port->dev, "stop bits = 1.5\n"); 389 } else { 390 buf[4] = 2; 391 dev_dbg(&port->dev, "stop bits = 2\n"); 392 } 393 } else { 394 buf[4] = 0; 395 dev_dbg(&port->dev, "stop bits = 1\n"); 396 } 397 398 if (cflag & PARENB) { 399 /* For reference buf[5]=0 is none parity */ 400 /* For reference buf[5]=1 is odd parity */ 401 /* For reference buf[5]=2 is even parity */ 402 /* For reference buf[5]=3 is mark parity */ 403 /* For reference buf[5]=4 is space parity */ 404 if (cflag & PARODD) { 405 if (cflag & CMSPAR) { 406 buf[5] = 3; 407 dev_dbg(&port->dev, "parity = mark\n"); 408 } else { 409 buf[5] = 1; 410 dev_dbg(&port->dev, "parity = odd\n"); 411 } 412 } else { 413 if (cflag & CMSPAR) { 414 buf[5] = 4; 415 dev_dbg(&port->dev, "parity = space\n"); 416 } else { 417 buf[5] = 2; 418 dev_dbg(&port->dev, "parity = even\n"); 419 } 420 } 421 } else { 422 buf[5] = 0; 423 dev_dbg(&port->dev, "parity = none\n"); 424 } 425 426 i = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), 427 SET_LINE_REQUEST, SET_LINE_REQUEST_TYPE, 428 0, 0, buf, 7, 100); 429 dev_dbg(&port->dev, "0x21:0x20:0:0 %d\n", i); 430 431 /* change control lines if we are switching to or from B0 */ 432 spin_lock_irqsave(&priv->lock, flags); 433 control = priv->line_control; 434 if ((cflag & CBAUD) == B0) 435 priv->line_control &= ~(CONTROL_DTR | CONTROL_RTS); 436 else if (old_termios && (old_termios->c_cflag & CBAUD) == B0) 437 priv->line_control |= (CONTROL_DTR | CONTROL_RTS); 438 if (control != priv->line_control) { 439 control = priv->line_control; 440 spin_unlock_irqrestore(&priv->lock, flags); 441 pl2303_set_control_lines(port, control); 442 } else { 443 spin_unlock_irqrestore(&priv->lock, flags); 444 } 445 446 buf[0] = buf[1] = buf[2] = buf[3] = buf[4] = buf[5] = buf[6] = 0; 447 448 i = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0), 449 GET_LINE_REQUEST, GET_LINE_REQUEST_TYPE, 450 0, 0, buf, 7, 100); 451 dev_dbg(&port->dev, "0xa1:0x21:0:0 %d - %7ph\n", i, buf); 452 453 if (cflag & CRTSCTS) { 454 if (spriv->type == HX) 455 pl2303_vendor_write(0x0, 0x61, serial); 456 else 457 pl2303_vendor_write(0x0, 0x41, serial); 458 } else { 459 pl2303_vendor_write(0x0, 0x0, serial); 460 } 461 462 /* Save resulting baud rate */ 463 if (baud) 464 tty_encode_baud_rate(tty, baud, baud); 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 port->port.drain_delay = 256; 525 return 0; 526 } 527 528 static int pl2303_tiocmset(struct tty_struct *tty, 529 unsigned int set, unsigned int clear) 530 { 531 struct usb_serial_port *port = tty->driver_data; 532 struct pl2303_private *priv = usb_get_serial_port_data(port); 533 unsigned long flags; 534 u8 control; 535 int ret; 536 537 spin_lock_irqsave(&priv->lock, flags); 538 if (set & TIOCM_RTS) 539 priv->line_control |= CONTROL_RTS; 540 if (set & TIOCM_DTR) 541 priv->line_control |= CONTROL_DTR; 542 if (clear & TIOCM_RTS) 543 priv->line_control &= ~CONTROL_RTS; 544 if (clear & TIOCM_DTR) 545 priv->line_control &= ~CONTROL_DTR; 546 control = priv->line_control; 547 spin_unlock_irqrestore(&priv->lock, flags); 548 549 ret = pl2303_set_control_lines(port, control); 550 if (ret) 551 return usb_translate_errors(ret); 552 553 return 0; 554 } 555 556 static int pl2303_tiocmget(struct tty_struct *tty) 557 { 558 struct usb_serial_port *port = tty->driver_data; 559 struct pl2303_private *priv = usb_get_serial_port_data(port); 560 unsigned long flags; 561 unsigned int mcr; 562 unsigned int status; 563 unsigned int result; 564 565 spin_lock_irqsave(&priv->lock, flags); 566 mcr = priv->line_control; 567 status = priv->line_status; 568 spin_unlock_irqrestore(&priv->lock, flags); 569 570 result = ((mcr & CONTROL_DTR) ? TIOCM_DTR : 0) 571 | ((mcr & CONTROL_RTS) ? TIOCM_RTS : 0) 572 | ((status & UART_CTS) ? TIOCM_CTS : 0) 573 | ((status & UART_DSR) ? TIOCM_DSR : 0) 574 | ((status & UART_RING) ? TIOCM_RI : 0) 575 | ((status & UART_DCD) ? TIOCM_CD : 0); 576 577 dev_dbg(&port->dev, "%s - result = %x\n", __func__, result); 578 579 return result; 580 } 581 582 static int pl2303_carrier_raised(struct usb_serial_port *port) 583 { 584 struct pl2303_private *priv = usb_get_serial_port_data(port); 585 if (priv->line_status & UART_DCD) 586 return 1; 587 return 0; 588 } 589 590 static int pl2303_tiocmiwait(struct tty_struct *tty, unsigned long arg) 591 { 592 struct usb_serial_port *port = tty->driver_data; 593 struct pl2303_private *priv = usb_get_serial_port_data(port); 594 unsigned long flags; 595 unsigned int prevstatus; 596 unsigned int status; 597 unsigned int changed; 598 599 spin_lock_irqsave(&priv->lock, flags); 600 prevstatus = priv->line_status; 601 spin_unlock_irqrestore(&priv->lock, flags); 602 603 while (1) { 604 interruptible_sleep_on(&port->port.delta_msr_wait); 605 /* see if a signal did it */ 606 if (signal_pending(current)) 607 return -ERESTARTSYS; 608 609 if (port->serial->disconnected) 610 return -EIO; 611 612 spin_lock_irqsave(&priv->lock, flags); 613 status = priv->line_status; 614 spin_unlock_irqrestore(&priv->lock, flags); 615 616 changed = prevstatus ^ status; 617 618 if (((arg & TIOCM_RNG) && (changed & UART_RING)) || 619 ((arg & TIOCM_DSR) && (changed & UART_DSR)) || 620 ((arg & TIOCM_CD) && (changed & UART_DCD)) || 621 ((arg & TIOCM_CTS) && (changed & UART_CTS))) { 622 return 0; 623 } 624 prevstatus = status; 625 } 626 /* NOTREACHED */ 627 return 0; 628 } 629 630 static int pl2303_ioctl(struct tty_struct *tty, 631 unsigned int cmd, unsigned long arg) 632 { 633 struct serial_struct ser; 634 struct usb_serial_port *port = tty->driver_data; 635 636 dev_dbg(&port->dev, "%s cmd = 0x%04x\n", __func__, cmd); 637 638 switch (cmd) { 639 case TIOCGSERIAL: 640 memset(&ser, 0, sizeof ser); 641 ser.type = PORT_16654; 642 ser.line = port->minor; 643 ser.port = port->port_number; 644 ser.baud_base = 460800; 645 646 if (copy_to_user((void __user *)arg, &ser, sizeof ser)) 647 return -EFAULT; 648 649 return 0; 650 default: 651 dev_dbg(&port->dev, "%s not supported = 0x%04x\n", __func__, cmd); 652 break; 653 } 654 return -ENOIOCTLCMD; 655 } 656 657 static void pl2303_break_ctl(struct tty_struct *tty, int break_state) 658 { 659 struct usb_serial_port *port = tty->driver_data; 660 struct usb_serial *serial = port->serial; 661 u16 state; 662 int result; 663 664 if (break_state == 0) 665 state = BREAK_OFF; 666 else 667 state = BREAK_ON; 668 dev_dbg(&port->dev, "%s - turning break %s\n", __func__, 669 state == BREAK_OFF ? "off" : "on"); 670 671 result = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), 672 BREAK_REQUEST, BREAK_REQUEST_TYPE, state, 673 0, NULL, 0, 100); 674 if (result) 675 dev_err(&port->dev, "error sending break = %d\n", result); 676 } 677 678 static void pl2303_update_line_status(struct usb_serial_port *port, 679 unsigned char *data, 680 unsigned int actual_length) 681 { 682 683 struct pl2303_private *priv = usb_get_serial_port_data(port); 684 struct tty_struct *tty; 685 unsigned long flags; 686 u8 status_idx = UART_STATE; 687 u8 length = UART_STATE + 1; 688 u8 prev_line_status; 689 u16 idv, idp; 690 691 idv = le16_to_cpu(port->serial->dev->descriptor.idVendor); 692 idp = le16_to_cpu(port->serial->dev->descriptor.idProduct); 693 694 695 if (idv == SIEMENS_VENDOR_ID) { 696 if (idp == SIEMENS_PRODUCT_ID_X65 || 697 idp == SIEMENS_PRODUCT_ID_SX1 || 698 idp == SIEMENS_PRODUCT_ID_X75) { 699 700 length = 1; 701 status_idx = 0; 702 } 703 } 704 705 if (actual_length < length) 706 return; 707 708 /* Save off the uart status for others to look at */ 709 spin_lock_irqsave(&priv->lock, flags); 710 prev_line_status = priv->line_status; 711 priv->line_status = data[status_idx]; 712 spin_unlock_irqrestore(&priv->lock, flags); 713 if (priv->line_status & UART_BREAK_ERROR) 714 usb_serial_handle_break(port); 715 wake_up_interruptible(&port->port.delta_msr_wait); 716 717 tty = tty_port_tty_get(&port->port); 718 if (!tty) 719 return; 720 if ((priv->line_status ^ prev_line_status) & UART_DCD) 721 usb_serial_handle_dcd_change(port, tty, 722 priv->line_status & UART_DCD); 723 tty_kref_put(tty); 724 } 725 726 static void pl2303_read_int_callback(struct urb *urb) 727 { 728 struct usb_serial_port *port = urb->context; 729 unsigned char *data = urb->transfer_buffer; 730 unsigned int actual_length = urb->actual_length; 731 int status = urb->status; 732 int retval; 733 734 switch (status) { 735 case 0: 736 /* success */ 737 break; 738 case -ECONNRESET: 739 case -ENOENT: 740 case -ESHUTDOWN: 741 /* this urb is terminated, clean up */ 742 dev_dbg(&port->dev, "%s - urb shutting down with status: %d\n", 743 __func__, status); 744 return; 745 default: 746 dev_dbg(&port->dev, "%s - nonzero urb status received: %d\n", 747 __func__, status); 748 goto exit; 749 } 750 751 usb_serial_debug_data(&port->dev, __func__, 752 urb->actual_length, urb->transfer_buffer); 753 754 pl2303_update_line_status(port, data, actual_length); 755 756 exit: 757 retval = usb_submit_urb(urb, GFP_ATOMIC); 758 if (retval) 759 dev_err(&port->dev, 760 "%s - usb_submit_urb failed with result %d\n", 761 __func__, retval); 762 } 763 764 static void pl2303_process_read_urb(struct urb *urb) 765 { 766 struct usb_serial_port *port = urb->context; 767 struct pl2303_private *priv = usb_get_serial_port_data(port); 768 unsigned char *data = urb->transfer_buffer; 769 char tty_flag = TTY_NORMAL; 770 unsigned long flags; 771 u8 line_status; 772 int i; 773 774 /* update line status */ 775 spin_lock_irqsave(&priv->lock, flags); 776 line_status = priv->line_status; 777 priv->line_status &= ~UART_STATE_TRANSIENT_MASK; 778 spin_unlock_irqrestore(&priv->lock, flags); 779 wake_up_interruptible(&port->port.delta_msr_wait); 780 781 if (!urb->actual_length) 782 return; 783 784 /* break takes precedence over parity, */ 785 /* which takes precedence over framing errors */ 786 if (line_status & UART_BREAK_ERROR) 787 tty_flag = TTY_BREAK; 788 else if (line_status & UART_PARITY_ERROR) 789 tty_flag = TTY_PARITY; 790 else if (line_status & UART_FRAME_ERROR) 791 tty_flag = TTY_FRAME; 792 dev_dbg(&port->dev, "%s - tty_flag = %d\n", __func__, tty_flag); 793 794 /* overrun is special, not associated with a char */ 795 if (line_status & UART_OVERRUN_ERROR) 796 tty_insert_flip_char(&port->port, 0, TTY_OVERRUN); 797 798 if (port->port.console && port->sysrq) { 799 for (i = 0; i < urb->actual_length; ++i) 800 if (!usb_serial_handle_sysrq_char(port, data[i])) 801 tty_insert_flip_char(&port->port, data[i], 802 tty_flag); 803 } else { 804 tty_insert_flip_string_fixed_flag(&port->port, data, tty_flag, 805 urb->actual_length); 806 } 807 808 tty_flip_buffer_push(&port->port); 809 } 810 811 /* All of the device info needed for the PL2303 SIO serial converter */ 812 static struct usb_serial_driver pl2303_device = { 813 .driver = { 814 .owner = THIS_MODULE, 815 .name = "pl2303", 816 }, 817 .id_table = id_table, 818 .num_ports = 1, 819 .bulk_in_size = 256, 820 .bulk_out_size = 256, 821 .open = pl2303_open, 822 .close = pl2303_close, 823 .dtr_rts = pl2303_dtr_rts, 824 .carrier_raised = pl2303_carrier_raised, 825 .ioctl = pl2303_ioctl, 826 .break_ctl = pl2303_break_ctl, 827 .set_termios = pl2303_set_termios, 828 .tiocmget = pl2303_tiocmget, 829 .tiocmset = pl2303_tiocmset, 830 .tiocmiwait = pl2303_tiocmiwait, 831 .process_read_urb = pl2303_process_read_urb, 832 .read_int_callback = pl2303_read_int_callback, 833 .attach = pl2303_startup, 834 .release = pl2303_release, 835 .port_probe = pl2303_port_probe, 836 .port_remove = pl2303_port_remove, 837 }; 838 839 static struct usb_serial_driver * const serial_drivers[] = { 840 &pl2303_device, NULL 841 }; 842 843 module_usb_serial_driver(serial_drivers, id_table); 844 845 MODULE_DESCRIPTION(DRIVER_DESC); 846 MODULE_LICENSE("GPL"); 847