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 * Copyright (C) 2009, 2013 Frank Schäfer <fschaefer.oss@googlemail.com> 8 * - fixes, improvements and documentation for the baud rate encoding methods 9 * Copyright (C) 2013 Reinhard Max <max@suse.de> 10 * - fixes and improvements for the divisor based baud rate encoding method 11 * 12 * Original driver for 2.2.x by anonymous 13 * 14 * This program is free software; you can redistribute it and/or 15 * modify it under the terms of the GNU General Public License version 16 * 2 as published by the Free Software Foundation. 17 * 18 * See Documentation/usb/usb-serial.txt for more information on using this 19 * driver 20 * 21 */ 22 23 #include <linux/kernel.h> 24 #include <linux/errno.h> 25 #include <linux/init.h> 26 #include <linux/slab.h> 27 #include <linux/tty.h> 28 #include <linux/tty_driver.h> 29 #include <linux/tty_flip.h> 30 #include <linux/serial.h> 31 #include <linux/module.h> 32 #include <linux/moduleparam.h> 33 #include <linux/spinlock.h> 34 #include <linux/uaccess.h> 35 #include <linux/usb.h> 36 #include <linux/usb/serial.h> 37 #include <asm/unaligned.h> 38 #include "pl2303.h" 39 40 /* 41 * Version Information 42 */ 43 #define DRIVER_DESC "Prolific PL2303 USB to serial adaptor driver" 44 45 static const struct usb_device_id id_table[] = { 46 { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID) }, 47 { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_RSAQ2) }, 48 { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_DCU11) }, 49 { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_RSAQ3) }, 50 { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_PHAROS) }, 51 { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_ALDIGA) }, 52 { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_MMX) }, 53 { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_GPRS) }, 54 { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_HCR331) }, 55 { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_MOTOROLA) }, 56 { USB_DEVICE(IODATA_VENDOR_ID, IODATA_PRODUCT_ID) }, 57 { USB_DEVICE(IODATA_VENDOR_ID, IODATA_PRODUCT_ID_RSAQ5) }, 58 { USB_DEVICE(ATEN_VENDOR_ID, ATEN_PRODUCT_ID) }, 59 { USB_DEVICE(ATEN_VENDOR_ID2, ATEN_PRODUCT_ID) }, 60 { USB_DEVICE(ELCOM_VENDOR_ID, ELCOM_PRODUCT_ID) }, 61 { USB_DEVICE(ELCOM_VENDOR_ID, ELCOM_PRODUCT_ID_UCSGT) }, 62 { USB_DEVICE(ITEGNO_VENDOR_ID, ITEGNO_PRODUCT_ID) }, 63 { USB_DEVICE(ITEGNO_VENDOR_ID, ITEGNO_PRODUCT_ID_2080) }, 64 { USB_DEVICE(MA620_VENDOR_ID, MA620_PRODUCT_ID) }, 65 { USB_DEVICE(RATOC_VENDOR_ID, RATOC_PRODUCT_ID) }, 66 { USB_DEVICE(TRIPP_VENDOR_ID, TRIPP_PRODUCT_ID) }, 67 { USB_DEVICE(RADIOSHACK_VENDOR_ID, RADIOSHACK_PRODUCT_ID) }, 68 { USB_DEVICE(DCU10_VENDOR_ID, DCU10_PRODUCT_ID) }, 69 { USB_DEVICE(SITECOM_VENDOR_ID, SITECOM_PRODUCT_ID) }, 70 { USB_DEVICE(ALCATEL_VENDOR_ID, ALCATEL_PRODUCT_ID) }, 71 { USB_DEVICE(SAMSUNG_VENDOR_ID, SAMSUNG_PRODUCT_ID) }, 72 { USB_DEVICE(SIEMENS_VENDOR_ID, SIEMENS_PRODUCT_ID_SX1) }, 73 { USB_DEVICE(SIEMENS_VENDOR_ID, SIEMENS_PRODUCT_ID_X65) }, 74 { USB_DEVICE(SIEMENS_VENDOR_ID, SIEMENS_PRODUCT_ID_X75) }, 75 { USB_DEVICE(SIEMENS_VENDOR_ID, SIEMENS_PRODUCT_ID_EF81) }, 76 { USB_DEVICE(BENQ_VENDOR_ID, BENQ_PRODUCT_ID_S81) }, /* Benq/Siemens S81 */ 77 { USB_DEVICE(SYNTECH_VENDOR_ID, SYNTECH_PRODUCT_ID) }, 78 { USB_DEVICE(NOKIA_CA42_VENDOR_ID, NOKIA_CA42_PRODUCT_ID) }, 79 { USB_DEVICE(CA_42_CA42_VENDOR_ID, CA_42_CA42_PRODUCT_ID) }, 80 { USB_DEVICE(SAGEM_VENDOR_ID, SAGEM_PRODUCT_ID) }, 81 { USB_DEVICE(LEADTEK_VENDOR_ID, LEADTEK_9531_PRODUCT_ID) }, 82 { USB_DEVICE(SPEEDDRAGON_VENDOR_ID, SPEEDDRAGON_PRODUCT_ID) }, 83 { USB_DEVICE(DATAPILOT_U2_VENDOR_ID, DATAPILOT_U2_PRODUCT_ID) }, 84 { USB_DEVICE(BELKIN_VENDOR_ID, BELKIN_PRODUCT_ID) }, 85 { USB_DEVICE(ALCOR_VENDOR_ID, ALCOR_PRODUCT_ID) }, 86 { USB_DEVICE(WS002IN_VENDOR_ID, WS002IN_PRODUCT_ID) }, 87 { USB_DEVICE(COREGA_VENDOR_ID, COREGA_PRODUCT_ID) }, 88 { USB_DEVICE(YCCABLE_VENDOR_ID, YCCABLE_PRODUCT_ID) }, 89 { USB_DEVICE(SUPERIAL_VENDOR_ID, SUPERIAL_PRODUCT_ID) }, 90 { USB_DEVICE(HP_VENDOR_ID, HP_LD220_PRODUCT_ID) }, 91 { USB_DEVICE(CRESSI_VENDOR_ID, CRESSI_EDY_PRODUCT_ID) }, 92 { USB_DEVICE(ZEAGLE_VENDOR_ID, ZEAGLE_N2ITION3_PRODUCT_ID) }, 93 { USB_DEVICE(SONY_VENDOR_ID, SONY_QN3USB_PRODUCT_ID) }, 94 { USB_DEVICE(SANWA_VENDOR_ID, SANWA_PRODUCT_ID) }, 95 { USB_DEVICE(ADLINK_VENDOR_ID, ADLINK_ND6530_PRODUCT_ID) }, 96 { USB_DEVICE(SMART_VENDOR_ID, SMART_PRODUCT_ID) }, 97 { } /* Terminating entry */ 98 }; 99 100 MODULE_DEVICE_TABLE(usb, id_table); 101 102 #define SET_LINE_REQUEST_TYPE 0x21 103 #define SET_LINE_REQUEST 0x20 104 105 #define SET_CONTROL_REQUEST_TYPE 0x21 106 #define SET_CONTROL_REQUEST 0x22 107 #define CONTROL_DTR 0x01 108 #define CONTROL_RTS 0x02 109 110 #define BREAK_REQUEST_TYPE 0x21 111 #define BREAK_REQUEST 0x23 112 #define BREAK_ON 0xffff 113 #define BREAK_OFF 0x0000 114 115 #define GET_LINE_REQUEST_TYPE 0xa1 116 #define GET_LINE_REQUEST 0x21 117 118 #define VENDOR_WRITE_REQUEST_TYPE 0x40 119 #define VENDOR_WRITE_REQUEST 0x01 120 121 #define VENDOR_READ_REQUEST_TYPE 0xc0 122 #define VENDOR_READ_REQUEST 0x01 123 124 #define UART_STATE 0x08 125 #define UART_STATE_TRANSIENT_MASK 0x74 126 #define UART_DCD 0x01 127 #define UART_DSR 0x02 128 #define UART_BREAK_ERROR 0x04 129 #define UART_RING 0x08 130 #define UART_FRAME_ERROR 0x10 131 #define UART_PARITY_ERROR 0x20 132 #define UART_OVERRUN_ERROR 0x40 133 #define UART_CTS 0x80 134 135 136 enum pl2303_type { 137 type_0, /* H version ? */ 138 type_1, /* H version ? */ 139 HX_TA, /* HX(A) / X(A) / TA version */ /* TODO: improve */ 140 HXD_EA_RA_SA, /* HXD / EA / RA / SA version */ /* TODO: improve */ 141 TB, /* TB version */ 142 }; 143 /* 144 * NOTE: don't know the difference between type 0 and type 1, 145 * until someone from Prolific tells us... 146 * TODO: distinguish between X/HX, TA and HXD, EA, RA, SA variants 147 */ 148 149 struct pl2303_serial_private { 150 enum pl2303_type type; 151 }; 152 153 struct pl2303_private { 154 spinlock_t lock; 155 u8 line_control; 156 u8 line_status; 157 }; 158 159 static int pl2303_vendor_read(__u16 value, __u16 index, 160 struct usb_serial *serial, unsigned char *buf) 161 { 162 int res = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0), 163 VENDOR_READ_REQUEST, VENDOR_READ_REQUEST_TYPE, 164 value, index, buf, 1, 100); 165 dev_dbg(&serial->interface->dev, "0x%x:0x%x:0x%x:0x%x %d - %x\n", 166 VENDOR_READ_REQUEST_TYPE, VENDOR_READ_REQUEST, value, index, 167 res, buf[0]); 168 return res; 169 } 170 171 static int pl2303_vendor_write(__u16 value, __u16 index, 172 struct usb_serial *serial) 173 { 174 int res = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), 175 VENDOR_WRITE_REQUEST, VENDOR_WRITE_REQUEST_TYPE, 176 value, index, NULL, 0, 100); 177 dev_dbg(&serial->interface->dev, "0x%x:0x%x:0x%x:0x%x %d\n", 178 VENDOR_WRITE_REQUEST_TYPE, VENDOR_WRITE_REQUEST, value, index, 179 res); 180 return res; 181 } 182 183 static int pl2303_startup(struct usb_serial *serial) 184 { 185 struct pl2303_serial_private *spriv; 186 enum pl2303_type type = type_0; 187 char *type_str = "unknown (treating as type_0)"; 188 unsigned char *buf; 189 190 spriv = kzalloc(sizeof(*spriv), GFP_KERNEL); 191 if (!spriv) 192 return -ENOMEM; 193 194 buf = kmalloc(10, GFP_KERNEL); 195 if (!buf) { 196 kfree(spriv); 197 return -ENOMEM; 198 } 199 200 if (serial->dev->descriptor.bDeviceClass == 0x02) { 201 type = type_0; 202 type_str = "type_0"; 203 } else if (serial->dev->descriptor.bMaxPacketSize0 == 0x40) { 204 /* 205 * NOTE: The bcdDevice version is the only difference between 206 * the device descriptors of the X/HX, HXD, EA, RA, SA, TA, TB 207 */ 208 if (le16_to_cpu(serial->dev->descriptor.bcdDevice) == 0x300) { 209 type = HX_TA; 210 type_str = "X/HX/TA"; 211 } else if (le16_to_cpu(serial->dev->descriptor.bcdDevice) 212 == 0x400) { 213 type = HXD_EA_RA_SA; 214 type_str = "HXD/EA/RA/SA"; 215 } else if (le16_to_cpu(serial->dev->descriptor.bcdDevice) 216 == 0x500) { 217 type = TB; 218 type_str = "TB"; 219 } else { 220 dev_info(&serial->interface->dev, 221 "unknown/unsupported device type\n"); 222 kfree(spriv); 223 kfree(buf); 224 return -ENODEV; 225 } 226 } else if (serial->dev->descriptor.bDeviceClass == 0x00 227 || serial->dev->descriptor.bDeviceClass == 0xFF) { 228 type = type_1; 229 type_str = "type_1"; 230 } 231 dev_dbg(&serial->interface->dev, "device type: %s\n", type_str); 232 233 spriv->type = type; 234 usb_set_serial_data(serial, spriv); 235 236 pl2303_vendor_read(0x8484, 0, serial, buf); 237 pl2303_vendor_write(0x0404, 0, serial); 238 pl2303_vendor_read(0x8484, 0, serial, buf); 239 pl2303_vendor_read(0x8383, 0, serial, buf); 240 pl2303_vendor_read(0x8484, 0, serial, buf); 241 pl2303_vendor_write(0x0404, 1, serial); 242 pl2303_vendor_read(0x8484, 0, serial, buf); 243 pl2303_vendor_read(0x8383, 0, serial, buf); 244 pl2303_vendor_write(0, 1, serial); 245 pl2303_vendor_write(1, 0, serial); 246 if (type == type_0 || type == type_1) 247 pl2303_vendor_write(2, 0x24, serial); 248 else 249 pl2303_vendor_write(2, 0x44, serial); 250 251 kfree(buf); 252 return 0; 253 } 254 255 static void pl2303_release(struct usb_serial *serial) 256 { 257 struct pl2303_serial_private *spriv; 258 259 spriv = usb_get_serial_data(serial); 260 kfree(spriv); 261 } 262 263 static int pl2303_port_probe(struct usb_serial_port *port) 264 { 265 struct pl2303_private *priv; 266 267 priv = kzalloc(sizeof(*priv), GFP_KERNEL); 268 if (!priv) 269 return -ENOMEM; 270 271 spin_lock_init(&priv->lock); 272 273 usb_set_serial_port_data(port, priv); 274 275 port->port.drain_delay = 256; 276 277 return 0; 278 } 279 280 static int pl2303_port_remove(struct usb_serial_port *port) 281 { 282 struct pl2303_private *priv; 283 284 priv = usb_get_serial_port_data(port); 285 kfree(priv); 286 287 return 0; 288 } 289 290 static int pl2303_set_control_lines(struct usb_serial_port *port, u8 value) 291 { 292 struct usb_device *dev = port->serial->dev; 293 int retval; 294 295 retval = usb_control_msg(dev, usb_sndctrlpipe(dev, 0), 296 SET_CONTROL_REQUEST, SET_CONTROL_REQUEST_TYPE, 297 value, 0, NULL, 0, 100); 298 dev_dbg(&port->dev, "%s - value = %d, retval = %d\n", __func__, 299 value, retval); 300 return retval; 301 } 302 303 static int pl2303_baudrate_encode_direct(int baud, enum pl2303_type type, 304 u8 buf[4]) 305 { 306 /* 307 * NOTE: Only the values defined in baud_sup are supported ! 308 * => if unsupported values are set, the PL2303 seems to 309 * use 9600 baud (at least my PL2303X always does) 310 */ 311 const int baud_sup[] = { 75, 150, 300, 600, 1200, 1800, 2400, 3600, 312 4800, 7200, 9600, 14400, 19200, 28800, 38400, 313 57600, 115200, 230400, 460800, 614400, 921600, 314 1228800, 2457600, 3000000, 6000000, 12000000 }; 315 /* 316 * NOTE: With the exception of type_0/1 devices, the following 317 * additional baud rates are supported (tested with HX rev. 3A only): 318 * 110*, 56000*, 128000, 134400, 161280, 201600, 256000*, 268800, 319 * 403200, 806400. (*: not HX) 320 * 321 * Maximum values: HXD, TB: 12000000; HX, TA: 6000000; 322 * type_0+1: 1228800; RA: 921600; SA: 115200 323 * 324 * As long as we are not using this encoding method for anything else 325 * than the type_0+1 and HX chips, there is no point in complicating 326 * the code to support them. 327 */ 328 int i; 329 330 /* Set baudrate to nearest supported value */ 331 for (i = 0; i < ARRAY_SIZE(baud_sup); ++i) { 332 if (baud_sup[i] > baud) 333 break; 334 } 335 if (i == ARRAY_SIZE(baud_sup)) 336 baud = baud_sup[i - 1]; 337 else if (i > 0 && (baud_sup[i] - baud) > (baud - baud_sup[i - 1])) 338 baud = baud_sup[i - 1]; 339 else 340 baud = baud_sup[i]; 341 /* Respect the chip type specific baud rate limits */ 342 /* 343 * FIXME: as long as we don't know how to distinguish between the 344 * HXD, EA, RA, and SA chip variants, allow the max. value of 12M. 345 */ 346 if (type == HX_TA) 347 baud = min_t(int, baud, 6000000); 348 else if (type == type_0 || type == type_1) 349 baud = min_t(int, baud, 1228800); 350 /* Direct (standard) baud rate encoding method */ 351 put_unaligned_le32(baud, buf); 352 353 return baud; 354 } 355 356 static int pl2303_baudrate_encode_divisor(int baud, enum pl2303_type type, 357 u8 buf[4]) 358 { 359 /* 360 * Divisor based baud rate encoding method 361 * 362 * NOTE: it's not clear if the type_0/1 chips support this method 363 * 364 * divisor = 12MHz * 32 / baudrate = 2^A * B 365 * 366 * with 367 * 368 * A = buf[1] & 0x0e 369 * B = buf[0] + (buf[1] & 0x01) << 8 370 * 371 * Special cases: 372 * => 8 < B < 16: device seems to work not properly 373 * => B <= 8: device uses the max. value B = 512 instead 374 */ 375 unsigned int A, B; 376 377 /* 378 * NOTE: The Windows driver allows maximum baud rates of 110% of the 379 * specified maximium value. 380 * Quick tests with early (2004) HX (rev. A) chips suggest, that even 381 * higher baud rates (up to the maximum of 24M baud !) are working fine, 382 * but that should really be tested carefully in "real life" scenarios 383 * before removing the upper limit completely. 384 * Baud rates smaller than the specified 75 baud are definitely working 385 * fine. 386 */ 387 if (type == type_0 || type == type_1) 388 baud = min_t(int, baud, 1228800 * 1.1); 389 else if (type == HX_TA) 390 baud = min_t(int, baud, 6000000 * 1.1); 391 else if (type == HXD_EA_RA_SA) 392 /* HXD, EA: 12Mbps; RA: 1Mbps; SA: 115200 bps */ 393 /* 394 * FIXME: as long as we don't know how to distinguish between 395 * these chip variants, allow the max. of these values 396 */ 397 baud = min_t(int, baud, 12000000 * 1.1); 398 else if (type == TB) 399 baud = min_t(int, baud, 12000000 * 1.1); 400 /* Determine factors A and B */ 401 A = 0; 402 B = 12000000 * 32 / baud; /* 12MHz */ 403 B <<= 1; /* Add one bit for rounding */ 404 while (B > (512 << 1) && A <= 14) { 405 A += 2; 406 B >>= 2; 407 } 408 if (A > 14) { /* max. divisor = min. baudrate reached */ 409 A = 14; 410 B = 512; 411 /* => ~45.78 baud */ 412 } else { 413 B = (B + 1) >> 1; /* Round the last bit */ 414 } 415 /* Handle special cases */ 416 if (B == 512) 417 B = 0; /* also: 1 to 8 */ 418 else if (B < 16) 419 /* 420 * NOTE: With the current algorithm this happens 421 * only for A=0 and means that the min. divisor 422 * (respectively: the max. baudrate) is reached. 423 */ 424 B = 16; /* => 24 MBaud */ 425 /* Encode the baud rate */ 426 buf[3] = 0x80; /* Select divisor encoding method */ 427 buf[2] = 0; 428 buf[1] = (A & 0x0e); /* A */ 429 buf[1] |= ((B & 0x100) >> 8); /* MSB of B */ 430 buf[0] = B & 0xff; /* 8 LSBs of B */ 431 /* Calculate the actual/resulting baud rate */ 432 if (B <= 8) 433 B = 512; 434 baud = 12000000 * 32 / ((1 << A) * B); 435 436 return baud; 437 } 438 439 static void pl2303_encode_baudrate(struct tty_struct *tty, 440 struct usb_serial_port *port, 441 enum pl2303_type type, 442 u8 buf[4]) 443 { 444 int baud; 445 446 baud = tty_get_baud_rate(tty); 447 dev_dbg(&port->dev, "baud requested = %d\n", baud); 448 if (!baud) 449 return; 450 /* 451 * There are two methods for setting/encoding the baud rate 452 * 1) Direct method: encodes the baud rate value directly 453 * => supported by all chip types 454 * 2) Divisor based method: encodes a divisor to a base value (12MHz*32) 455 * => supported by HX chips (and likely not by type_0/1 chips) 456 * 457 * NOTE: Although the divisor based baud rate encoding method is much 458 * more flexible, some of the standard baud rate values can not be 459 * realized exactly. But the difference is very small (max. 0.2%) and 460 * the device likely uses the same baud rate generator for both methods 461 * so that there is likley no difference. 462 */ 463 if (type == type_0 || type == type_1) 464 baud = pl2303_baudrate_encode_direct(baud, type, buf); 465 else 466 baud = pl2303_baudrate_encode_divisor(baud, type, buf); 467 /* Save resulting baud rate */ 468 tty_encode_baud_rate(tty, baud, baud); 469 dev_dbg(&port->dev, "baud set = %d\n", baud); 470 } 471 472 static void pl2303_set_termios(struct tty_struct *tty, 473 struct usb_serial_port *port, struct ktermios *old_termios) 474 { 475 struct usb_serial *serial = port->serial; 476 struct pl2303_serial_private *spriv = usb_get_serial_data(serial); 477 struct pl2303_private *priv = usb_get_serial_port_data(port); 478 unsigned long flags; 479 unsigned char *buf; 480 int i; 481 u8 control; 482 483 /* 484 * The PL2303 is reported to lose bytes if you change serial settings 485 * even to the same values as before. Thus we actually need to filter 486 * in this specific case. 487 */ 488 if (old_termios && !tty_termios_hw_change(&tty->termios, old_termios)) 489 return; 490 491 buf = kzalloc(7, GFP_KERNEL); 492 if (!buf) { 493 dev_err(&port->dev, "%s - out of memory.\n", __func__); 494 /* Report back no change occurred */ 495 if (old_termios) 496 tty->termios = *old_termios; 497 return; 498 } 499 500 i = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0), 501 GET_LINE_REQUEST, GET_LINE_REQUEST_TYPE, 502 0, 0, buf, 7, 100); 503 dev_dbg(&port->dev, "0xa1:0x21:0:0 %d - %7ph\n", i, buf); 504 505 if (C_CSIZE(tty)) { 506 switch (C_CSIZE(tty)) { 507 case CS5: 508 buf[6] = 5; 509 break; 510 case CS6: 511 buf[6] = 6; 512 break; 513 case CS7: 514 buf[6] = 7; 515 break; 516 default: 517 case CS8: 518 buf[6] = 8; 519 } 520 dev_dbg(&port->dev, "data bits = %d\n", buf[6]); 521 } 522 523 /* For reference: buf[0]:buf[3] baud rate value */ 524 pl2303_encode_baudrate(tty, port, spriv->type, buf); 525 526 /* For reference buf[4]=0 is 1 stop bits */ 527 /* For reference buf[4]=1 is 1.5 stop bits */ 528 /* For reference buf[4]=2 is 2 stop bits */ 529 if (C_CSTOPB(tty)) { 530 /* 531 * NOTE: Comply with "real" UARTs / RS232: 532 * use 1.5 instead of 2 stop bits with 5 data bits 533 */ 534 if (C_CSIZE(tty) == CS5) { 535 buf[4] = 1; 536 dev_dbg(&port->dev, "stop bits = 1.5\n"); 537 } else { 538 buf[4] = 2; 539 dev_dbg(&port->dev, "stop bits = 2\n"); 540 } 541 } else { 542 buf[4] = 0; 543 dev_dbg(&port->dev, "stop bits = 1\n"); 544 } 545 546 if (C_PARENB(tty)) { 547 /* For reference buf[5]=0 is none parity */ 548 /* For reference buf[5]=1 is odd parity */ 549 /* For reference buf[5]=2 is even parity */ 550 /* For reference buf[5]=3 is mark parity */ 551 /* For reference buf[5]=4 is space parity */ 552 if (C_PARODD(tty)) { 553 if (tty->termios.c_cflag & CMSPAR) { 554 buf[5] = 3; 555 dev_dbg(&port->dev, "parity = mark\n"); 556 } else { 557 buf[5] = 1; 558 dev_dbg(&port->dev, "parity = odd\n"); 559 } 560 } else { 561 if (tty->termios.c_cflag & CMSPAR) { 562 buf[5] = 4; 563 dev_dbg(&port->dev, "parity = space\n"); 564 } else { 565 buf[5] = 2; 566 dev_dbg(&port->dev, "parity = even\n"); 567 } 568 } 569 } else { 570 buf[5] = 0; 571 dev_dbg(&port->dev, "parity = none\n"); 572 } 573 574 i = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), 575 SET_LINE_REQUEST, SET_LINE_REQUEST_TYPE, 576 0, 0, buf, 7, 100); 577 dev_dbg(&port->dev, "0x21:0x20:0:0 %d\n", i); 578 579 /* change control lines if we are switching to or from B0 */ 580 spin_lock_irqsave(&priv->lock, flags); 581 control = priv->line_control; 582 if (C_BAUD(tty) == B0) 583 priv->line_control &= ~(CONTROL_DTR | CONTROL_RTS); 584 else if (old_termios && (old_termios->c_cflag & CBAUD) == B0) 585 priv->line_control |= (CONTROL_DTR | CONTROL_RTS); 586 if (control != priv->line_control) { 587 control = priv->line_control; 588 spin_unlock_irqrestore(&priv->lock, flags); 589 pl2303_set_control_lines(port, control); 590 } else { 591 spin_unlock_irqrestore(&priv->lock, flags); 592 } 593 594 memset(buf, 0, 7); 595 i = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0), 596 GET_LINE_REQUEST, GET_LINE_REQUEST_TYPE, 597 0, 0, buf, 7, 100); 598 dev_dbg(&port->dev, "0xa1:0x21:0:0 %d - %7ph\n", i, buf); 599 600 if (C_CRTSCTS(tty)) { 601 if (spriv->type == type_0 || spriv->type == type_1) 602 pl2303_vendor_write(0x0, 0x41, serial); 603 else 604 pl2303_vendor_write(0x0, 0x61, serial); 605 } else { 606 pl2303_vendor_write(0x0, 0x0, serial); 607 } 608 609 kfree(buf); 610 } 611 612 static void pl2303_dtr_rts(struct usb_serial_port *port, int on) 613 { 614 struct pl2303_private *priv = usb_get_serial_port_data(port); 615 unsigned long flags; 616 u8 control; 617 618 spin_lock_irqsave(&priv->lock, flags); 619 /* Change DTR and RTS */ 620 if (on) 621 priv->line_control |= (CONTROL_DTR | CONTROL_RTS); 622 else 623 priv->line_control &= ~(CONTROL_DTR | CONTROL_RTS); 624 control = priv->line_control; 625 spin_unlock_irqrestore(&priv->lock, flags); 626 pl2303_set_control_lines(port, control); 627 } 628 629 static void pl2303_close(struct usb_serial_port *port) 630 { 631 usb_serial_generic_close(port); 632 usb_kill_urb(port->interrupt_in_urb); 633 } 634 635 static int pl2303_open(struct tty_struct *tty, struct usb_serial_port *port) 636 { 637 struct usb_serial *serial = port->serial; 638 struct pl2303_serial_private *spriv = usb_get_serial_data(serial); 639 int result; 640 641 if (spriv->type == type_0 || spriv->type == type_1) { 642 usb_clear_halt(serial->dev, port->write_urb->pipe); 643 usb_clear_halt(serial->dev, port->read_urb->pipe); 644 } else { 645 /* reset upstream data pipes */ 646 pl2303_vendor_write(8, 0, serial); 647 pl2303_vendor_write(9, 0, serial); 648 } 649 650 /* Setup termios */ 651 if (tty) 652 pl2303_set_termios(tty, port, NULL); 653 654 result = usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL); 655 if (result) { 656 dev_err(&port->dev, "%s - failed submitting interrupt urb," 657 " error %d\n", __func__, result); 658 return result; 659 } 660 661 result = usb_serial_generic_open(tty, port); 662 if (result) { 663 usb_kill_urb(port->interrupt_in_urb); 664 return result; 665 } 666 667 return 0; 668 } 669 670 static int pl2303_tiocmset(struct tty_struct *tty, 671 unsigned int set, unsigned int clear) 672 { 673 struct usb_serial_port *port = tty->driver_data; 674 struct pl2303_private *priv = usb_get_serial_port_data(port); 675 unsigned long flags; 676 u8 control; 677 int ret; 678 679 spin_lock_irqsave(&priv->lock, flags); 680 if (set & TIOCM_RTS) 681 priv->line_control |= CONTROL_RTS; 682 if (set & TIOCM_DTR) 683 priv->line_control |= CONTROL_DTR; 684 if (clear & TIOCM_RTS) 685 priv->line_control &= ~CONTROL_RTS; 686 if (clear & TIOCM_DTR) 687 priv->line_control &= ~CONTROL_DTR; 688 control = priv->line_control; 689 spin_unlock_irqrestore(&priv->lock, flags); 690 691 ret = pl2303_set_control_lines(port, control); 692 if (ret) 693 return usb_translate_errors(ret); 694 695 return 0; 696 } 697 698 static int pl2303_tiocmget(struct tty_struct *tty) 699 { 700 struct usb_serial_port *port = tty->driver_data; 701 struct pl2303_private *priv = usb_get_serial_port_data(port); 702 unsigned long flags; 703 unsigned int mcr; 704 unsigned int status; 705 unsigned int result; 706 707 spin_lock_irqsave(&priv->lock, flags); 708 mcr = priv->line_control; 709 status = priv->line_status; 710 spin_unlock_irqrestore(&priv->lock, flags); 711 712 result = ((mcr & CONTROL_DTR) ? TIOCM_DTR : 0) 713 | ((mcr & CONTROL_RTS) ? TIOCM_RTS : 0) 714 | ((status & UART_CTS) ? TIOCM_CTS : 0) 715 | ((status & UART_DSR) ? TIOCM_DSR : 0) 716 | ((status & UART_RING) ? TIOCM_RI : 0) 717 | ((status & UART_DCD) ? TIOCM_CD : 0); 718 719 dev_dbg(&port->dev, "%s - result = %x\n", __func__, result); 720 721 return result; 722 } 723 724 static int pl2303_carrier_raised(struct usb_serial_port *port) 725 { 726 struct pl2303_private *priv = usb_get_serial_port_data(port); 727 if (priv->line_status & UART_DCD) 728 return 1; 729 return 0; 730 } 731 732 static int pl2303_tiocmiwait(struct tty_struct *tty, unsigned long arg) 733 { 734 struct usb_serial_port *port = tty->driver_data; 735 struct pl2303_private *priv = usb_get_serial_port_data(port); 736 unsigned long flags; 737 unsigned int prevstatus; 738 unsigned int status; 739 unsigned int changed; 740 741 spin_lock_irqsave(&priv->lock, flags); 742 prevstatus = priv->line_status; 743 spin_unlock_irqrestore(&priv->lock, flags); 744 745 while (1) { 746 interruptible_sleep_on(&port->port.delta_msr_wait); 747 /* see if a signal did it */ 748 if (signal_pending(current)) 749 return -ERESTARTSYS; 750 751 if (port->serial->disconnected) 752 return -EIO; 753 754 spin_lock_irqsave(&priv->lock, flags); 755 status = priv->line_status; 756 spin_unlock_irqrestore(&priv->lock, flags); 757 758 changed = prevstatus ^ status; 759 760 if (((arg & TIOCM_RNG) && (changed & UART_RING)) || 761 ((arg & TIOCM_DSR) && (changed & UART_DSR)) || 762 ((arg & TIOCM_CD) && (changed & UART_DCD)) || 763 ((arg & TIOCM_CTS) && (changed & UART_CTS))) { 764 return 0; 765 } 766 prevstatus = status; 767 } 768 /* NOTREACHED */ 769 return 0; 770 } 771 772 static int pl2303_ioctl(struct tty_struct *tty, 773 unsigned int cmd, unsigned long arg) 774 { 775 struct serial_struct ser; 776 struct usb_serial_port *port = tty->driver_data; 777 778 dev_dbg(&port->dev, "%s cmd = 0x%04x\n", __func__, cmd); 779 780 switch (cmd) { 781 case TIOCGSERIAL: 782 memset(&ser, 0, sizeof ser); 783 ser.type = PORT_16654; 784 ser.line = port->minor; 785 ser.port = port->port_number; 786 ser.baud_base = 460800; 787 788 if (copy_to_user((void __user *)arg, &ser, sizeof ser)) 789 return -EFAULT; 790 791 return 0; 792 default: 793 dev_dbg(&port->dev, "%s not supported = 0x%04x\n", __func__, cmd); 794 break; 795 } 796 return -ENOIOCTLCMD; 797 } 798 799 static void pl2303_break_ctl(struct tty_struct *tty, int break_state) 800 { 801 struct usb_serial_port *port = tty->driver_data; 802 struct usb_serial *serial = port->serial; 803 u16 state; 804 int result; 805 806 if (break_state == 0) 807 state = BREAK_OFF; 808 else 809 state = BREAK_ON; 810 dev_dbg(&port->dev, "%s - turning break %s\n", __func__, 811 state == BREAK_OFF ? "off" : "on"); 812 813 result = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), 814 BREAK_REQUEST, BREAK_REQUEST_TYPE, state, 815 0, NULL, 0, 100); 816 if (result) 817 dev_err(&port->dev, "error sending break = %d\n", result); 818 } 819 820 static void pl2303_update_line_status(struct usb_serial_port *port, 821 unsigned char *data, 822 unsigned int actual_length) 823 { 824 825 struct pl2303_private *priv = usb_get_serial_port_data(port); 826 struct tty_struct *tty; 827 unsigned long flags; 828 u8 status_idx = UART_STATE; 829 u8 length = UART_STATE + 1; 830 u8 prev_line_status; 831 u16 idv, idp; 832 833 idv = le16_to_cpu(port->serial->dev->descriptor.idVendor); 834 idp = le16_to_cpu(port->serial->dev->descriptor.idProduct); 835 836 837 if (idv == SIEMENS_VENDOR_ID) { 838 if (idp == SIEMENS_PRODUCT_ID_X65 || 839 idp == SIEMENS_PRODUCT_ID_SX1 || 840 idp == SIEMENS_PRODUCT_ID_X75) { 841 842 length = 1; 843 status_idx = 0; 844 } 845 } 846 847 if (actual_length < length) 848 return; 849 850 /* Save off the uart status for others to look at */ 851 spin_lock_irqsave(&priv->lock, flags); 852 prev_line_status = priv->line_status; 853 priv->line_status = data[status_idx]; 854 spin_unlock_irqrestore(&priv->lock, flags); 855 if (priv->line_status & UART_BREAK_ERROR) 856 usb_serial_handle_break(port); 857 wake_up_interruptible(&port->port.delta_msr_wait); 858 859 tty = tty_port_tty_get(&port->port); 860 if (!tty) 861 return; 862 if ((priv->line_status ^ prev_line_status) & UART_DCD) 863 usb_serial_handle_dcd_change(port, tty, 864 priv->line_status & UART_DCD); 865 tty_kref_put(tty); 866 } 867 868 static void pl2303_read_int_callback(struct urb *urb) 869 { 870 struct usb_serial_port *port = urb->context; 871 unsigned char *data = urb->transfer_buffer; 872 unsigned int actual_length = urb->actual_length; 873 int status = urb->status; 874 int retval; 875 876 switch (status) { 877 case 0: 878 /* success */ 879 break; 880 case -ECONNRESET: 881 case -ENOENT: 882 case -ESHUTDOWN: 883 /* this urb is terminated, clean up */ 884 dev_dbg(&port->dev, "%s - urb shutting down with status: %d\n", 885 __func__, status); 886 return; 887 default: 888 dev_dbg(&port->dev, "%s - nonzero urb status received: %d\n", 889 __func__, status); 890 goto exit; 891 } 892 893 usb_serial_debug_data(&port->dev, __func__, 894 urb->actual_length, urb->transfer_buffer); 895 896 pl2303_update_line_status(port, data, actual_length); 897 898 exit: 899 retval = usb_submit_urb(urb, GFP_ATOMIC); 900 if (retval) 901 dev_err(&port->dev, 902 "%s - usb_submit_urb failed with result %d\n", 903 __func__, retval); 904 } 905 906 static void pl2303_process_read_urb(struct urb *urb) 907 { 908 struct usb_serial_port *port = urb->context; 909 struct pl2303_private *priv = usb_get_serial_port_data(port); 910 unsigned char *data = urb->transfer_buffer; 911 char tty_flag = TTY_NORMAL; 912 unsigned long flags; 913 u8 line_status; 914 int i; 915 916 /* update line status */ 917 spin_lock_irqsave(&priv->lock, flags); 918 line_status = priv->line_status; 919 priv->line_status &= ~UART_STATE_TRANSIENT_MASK; 920 spin_unlock_irqrestore(&priv->lock, flags); 921 wake_up_interruptible(&port->port.delta_msr_wait); 922 923 if (!urb->actual_length) 924 return; 925 926 /* break takes precedence over parity, */ 927 /* which takes precedence over framing errors */ 928 if (line_status & UART_BREAK_ERROR) 929 tty_flag = TTY_BREAK; 930 else if (line_status & UART_PARITY_ERROR) 931 tty_flag = TTY_PARITY; 932 else if (line_status & UART_FRAME_ERROR) 933 tty_flag = TTY_FRAME; 934 935 if (tty_flag != TTY_NORMAL) 936 dev_dbg(&port->dev, "%s - tty_flag = %d\n", __func__, 937 tty_flag); 938 /* overrun is special, not associated with a char */ 939 if (line_status & UART_OVERRUN_ERROR) 940 tty_insert_flip_char(&port->port, 0, TTY_OVERRUN); 941 942 if (port->port.console && port->sysrq) { 943 for (i = 0; i < urb->actual_length; ++i) 944 if (!usb_serial_handle_sysrq_char(port, data[i])) 945 tty_insert_flip_char(&port->port, data[i], 946 tty_flag); 947 } else { 948 tty_insert_flip_string_fixed_flag(&port->port, data, tty_flag, 949 urb->actual_length); 950 } 951 952 tty_flip_buffer_push(&port->port); 953 } 954 955 /* All of the device info needed for the PL2303 SIO serial converter */ 956 static struct usb_serial_driver pl2303_device = { 957 .driver = { 958 .owner = THIS_MODULE, 959 .name = "pl2303", 960 }, 961 .id_table = id_table, 962 .num_ports = 1, 963 .bulk_in_size = 256, 964 .bulk_out_size = 256, 965 .open = pl2303_open, 966 .close = pl2303_close, 967 .dtr_rts = pl2303_dtr_rts, 968 .carrier_raised = pl2303_carrier_raised, 969 .ioctl = pl2303_ioctl, 970 .break_ctl = pl2303_break_ctl, 971 .set_termios = pl2303_set_termios, 972 .tiocmget = pl2303_tiocmget, 973 .tiocmset = pl2303_tiocmset, 974 .tiocmiwait = pl2303_tiocmiwait, 975 .process_read_urb = pl2303_process_read_urb, 976 .read_int_callback = pl2303_read_int_callback, 977 .attach = pl2303_startup, 978 .release = pl2303_release, 979 .port_probe = pl2303_port_probe, 980 .port_remove = pl2303_port_remove, 981 }; 982 983 static struct usb_serial_driver * const serial_drivers[] = { 984 &pl2303_device, NULL 985 }; 986 987 module_usb_serial_driver(serial_drivers, id_table); 988 989 MODULE_DESCRIPTION(DRIVER_DESC); 990 MODULE_LICENSE("GPL"); 991