pl2303.c revision a969888ce91673c7f4b86520d851a6f0d5a5fa7d
1/* 2 * Prolific PL2303 USB to serial adaptor driver 3 * 4 * Copyright (C) 2001-2004 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 modify 10 * it under the terms of the GNU General Public License as published by 11 * the Free Software Foundation; either version 2 of the License. 12 * 13 * See Documentation/usb/usb-serial.txt for more information on using this driver 14 * 15 */ 16 17#include <linux/kernel.h> 18#include <linux/errno.h> 19#include <linux/init.h> 20#include <linux/slab.h> 21#include <linux/tty.h> 22#include <linux/tty_driver.h> 23#include <linux/tty_flip.h> 24#include <linux/serial.h> 25#include <linux/module.h> 26#include <linux/moduleparam.h> 27#include <linux/spinlock.h> 28#include <asm/uaccess.h> 29#include <linux/usb.h> 30#include <linux/usb/serial.h> 31#include "pl2303.h" 32 33/* 34 * Version Information 35 */ 36#define DRIVER_DESC "Prolific PL2303 USB to serial adaptor driver" 37 38static int debug; 39 40#define PL2303_CLOSING_WAIT (30*HZ) 41 42#define PL2303_BUF_SIZE 1024 43#define PL2303_TMP_BUF_SIZE 1024 44 45struct pl2303_buf { 46 unsigned int buf_size; 47 char *buf_buf; 48 char *buf_get; 49 char *buf_put; 50}; 51 52static struct usb_device_id id_table [] = { 53 { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID) }, 54 { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_RSAQ2) }, 55 { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_DCU11) }, 56 { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_RSAQ3) }, 57 { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_PHAROS) }, 58 { USB_DEVICE(IODATA_VENDOR_ID, IODATA_PRODUCT_ID) }, 59 { USB_DEVICE(ATEN_VENDOR_ID, ATEN_PRODUCT_ID) }, 60 { USB_DEVICE(ATEN_VENDOR_ID2, ATEN_PRODUCT_ID) }, 61 { USB_DEVICE(ELCOM_VENDOR_ID, ELCOM_PRODUCT_ID) }, 62 { USB_DEVICE(ELCOM_VENDOR_ID, ELCOM_PRODUCT_ID_UCSGT) }, 63 { USB_DEVICE(ITEGNO_VENDOR_ID, ITEGNO_PRODUCT_ID) }, 64 { USB_DEVICE(ITEGNO_VENDOR_ID, ITEGNO_PRODUCT_ID_2080) }, 65 { USB_DEVICE(MA620_VENDOR_ID, MA620_PRODUCT_ID) }, 66 { USB_DEVICE(RATOC_VENDOR_ID, RATOC_PRODUCT_ID) }, 67 { USB_DEVICE(TRIPP_VENDOR_ID, TRIPP_PRODUCT_ID) }, 68 { USB_DEVICE(RADIOSHACK_VENDOR_ID, RADIOSHACK_PRODUCT_ID) }, 69 { USB_DEVICE(DCU10_VENDOR_ID, DCU10_PRODUCT_ID) }, 70 { USB_DEVICE(SITECOM_VENDOR_ID, SITECOM_PRODUCT_ID) }, 71 { USB_DEVICE(ALCATEL_VENDOR_ID, ALCATEL_PRODUCT_ID) }, 72 { USB_DEVICE(SAMSUNG_VENDOR_ID, SAMSUNG_PRODUCT_ID) }, 73 { USB_DEVICE(SIEMENS_VENDOR_ID, SIEMENS_PRODUCT_ID_SX1) }, 74 { USB_DEVICE(SIEMENS_VENDOR_ID, SIEMENS_PRODUCT_ID_X65) }, 75 { USB_DEVICE(SIEMENS_VENDOR_ID, SIEMENS_PRODUCT_ID_X75) }, 76 { USB_DEVICE(SYNTECH_VENDOR_ID, SYNTECH_PRODUCT_ID) }, 77 { USB_DEVICE(NOKIA_CA42_VENDOR_ID, NOKIA_CA42_PRODUCT_ID) }, 78 { USB_DEVICE(CA_42_CA42_VENDOR_ID, CA_42_CA42_PRODUCT_ID) }, 79 { USB_DEVICE(SAGEM_VENDOR_ID, SAGEM_PRODUCT_ID) }, 80 { USB_DEVICE(LEADTEK_VENDOR_ID, LEADTEK_9531_PRODUCT_ID) }, 81 { USB_DEVICE(SPEEDDRAGON_VENDOR_ID, SPEEDDRAGON_PRODUCT_ID) }, 82 { USB_DEVICE(OTI_VENDOR_ID, OTI_PRODUCT_ID) }, 83 { USB_DEVICE(DATAPILOT_U2_VENDOR_ID, DATAPILOT_U2_PRODUCT_ID) }, 84 { } /* Terminating entry */ 85}; 86 87MODULE_DEVICE_TABLE (usb, id_table); 88 89static struct usb_driver pl2303_driver = { 90 .name = "pl2303", 91 .probe = usb_serial_probe, 92 .disconnect = usb_serial_disconnect, 93 .id_table = id_table, 94 .no_dynamic_id = 1, 95}; 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/* function prototypes for a PL2303 serial converter */ 131static int pl2303_open (struct usb_serial_port *port, struct file *filp); 132static void pl2303_close (struct usb_serial_port *port, struct file *filp); 133static void pl2303_set_termios (struct usb_serial_port *port, 134 struct termios *old); 135static int pl2303_ioctl (struct usb_serial_port *port, struct file *file, 136 unsigned int cmd, unsigned long arg); 137static void pl2303_read_int_callback (struct urb *urb, struct pt_regs *regs); 138static void pl2303_read_bulk_callback (struct urb *urb, struct pt_regs *regs); 139static void pl2303_write_bulk_callback (struct urb *urb, struct pt_regs *regs); 140static int pl2303_write (struct usb_serial_port *port, 141 const unsigned char *buf, int count); 142static void pl2303_send (struct usb_serial_port *port); 143static int pl2303_write_room(struct usb_serial_port *port); 144static int pl2303_chars_in_buffer(struct usb_serial_port *port); 145static void pl2303_break_ctl(struct usb_serial_port *port,int break_state); 146static int pl2303_tiocmget (struct usb_serial_port *port, struct file *file); 147static int pl2303_tiocmset (struct usb_serial_port *port, struct file *file, 148 unsigned int set, unsigned int clear); 149static int pl2303_startup (struct usb_serial *serial); 150static void pl2303_shutdown (struct usb_serial *serial); 151static struct pl2303_buf *pl2303_buf_alloc(unsigned int size); 152static void pl2303_buf_free(struct pl2303_buf *pb); 153static void pl2303_buf_clear(struct pl2303_buf *pb); 154static unsigned int pl2303_buf_data_avail(struct pl2303_buf *pb); 155static unsigned int pl2303_buf_space_avail(struct pl2303_buf *pb); 156static unsigned int pl2303_buf_put(struct pl2303_buf *pb, const char *buf, 157 unsigned int count); 158static unsigned int pl2303_buf_get(struct pl2303_buf *pb, char *buf, 159 unsigned int count); 160 161 162/* All of the device info needed for the PL2303 SIO serial converter */ 163static struct usb_serial_driver pl2303_device = { 164 .driver = { 165 .owner = THIS_MODULE, 166 .name = "pl2303", 167 }, 168 .id_table = id_table, 169 .num_interrupt_in = NUM_DONT_CARE, 170 .num_bulk_in = 1, 171 .num_bulk_out = 1, 172 .num_ports = 1, 173 .open = pl2303_open, 174 .close = pl2303_close, 175 .write = pl2303_write, 176 .ioctl = pl2303_ioctl, 177 .break_ctl = pl2303_break_ctl, 178 .set_termios = pl2303_set_termios, 179 .tiocmget = pl2303_tiocmget, 180 .tiocmset = pl2303_tiocmset, 181 .read_bulk_callback = pl2303_read_bulk_callback, 182 .read_int_callback = pl2303_read_int_callback, 183 .write_bulk_callback = pl2303_write_bulk_callback, 184 .write_room = pl2303_write_room, 185 .chars_in_buffer = pl2303_chars_in_buffer, 186 .attach = pl2303_startup, 187 .shutdown = pl2303_shutdown, 188}; 189 190enum pl2303_type { 191 type_0, /* don't know the difference between type 0 and */ 192 type_1, /* type 1, until someone from prolific tells us... */ 193 HX, /* HX version of the pl2303 chip */ 194}; 195 196struct pl2303_private { 197 spinlock_t lock; 198 struct pl2303_buf *buf; 199 int write_urb_in_use; 200 wait_queue_head_t delta_msr_wait; 201 u8 line_control; 202 u8 line_status; 203 u8 termios_initialized; 204 enum pl2303_type type; 205}; 206 207 208static int pl2303_startup (struct usb_serial *serial) 209{ 210 struct pl2303_private *priv; 211 enum pl2303_type type = type_0; 212 int i; 213 214 if (serial->dev->descriptor.bDeviceClass == 0x02) 215 type = type_0; 216 else if (serial->dev->descriptor.bMaxPacketSize0 == 0x40) 217 type = HX; 218 else if (serial->dev->descriptor.bDeviceClass == 0x00) 219 type = type_1; 220 else if (serial->dev->descriptor.bDeviceClass == 0xFF) 221 type = type_1; 222 dbg("device type: %d", type); 223 224 for (i = 0; i < serial->num_ports; ++i) { 225 priv = kzalloc(sizeof(struct pl2303_private), GFP_KERNEL); 226 if (!priv) 227 goto cleanup; 228 spin_lock_init(&priv->lock); 229 priv->buf = pl2303_buf_alloc(PL2303_BUF_SIZE); 230 if (priv->buf == NULL) { 231 kfree(priv); 232 goto cleanup; 233 } 234 init_waitqueue_head(&priv->delta_msr_wait); 235 priv->type = type; 236 usb_set_serial_port_data(serial->port[i], priv); 237 } 238 return 0; 239 240cleanup: 241 for (--i; i>=0; --i) { 242 priv = usb_get_serial_port_data(serial->port[i]); 243 pl2303_buf_free(priv->buf); 244 kfree(priv); 245 usb_set_serial_port_data(serial->port[i], NULL); 246 } 247 return -ENOMEM; 248} 249 250static int set_control_lines (struct usb_device *dev, u8 value) 251{ 252 int retval; 253 254 retval = usb_control_msg (dev, usb_sndctrlpipe (dev, 0), 255 SET_CONTROL_REQUEST, SET_CONTROL_REQUEST_TYPE, 256 value, 0, NULL, 0, 100); 257 dbg("%s - value = %d, retval = %d", __FUNCTION__, value, retval); 258 return retval; 259} 260 261static int pl2303_write (struct usb_serial_port *port, const unsigned char *buf, int count) 262{ 263 struct pl2303_private *priv = usb_get_serial_port_data(port); 264 unsigned long flags; 265 266 dbg("%s - port %d, %d bytes", __FUNCTION__, port->number, count); 267 268 if (!count) 269 return count; 270 271 spin_lock_irqsave(&priv->lock, flags); 272 count = pl2303_buf_put(priv->buf, buf, count); 273 spin_unlock_irqrestore(&priv->lock, flags); 274 275 pl2303_send(port); 276 277 return count; 278} 279 280static void pl2303_send(struct usb_serial_port *port) 281{ 282 int count, result; 283 struct pl2303_private *priv = usb_get_serial_port_data(port); 284 unsigned long flags; 285 286 dbg("%s - port %d", __FUNCTION__, port->number); 287 288 spin_lock_irqsave(&priv->lock, flags); 289 290 if (priv->write_urb_in_use) { 291 spin_unlock_irqrestore(&priv->lock, flags); 292 return; 293 } 294 295 count = pl2303_buf_get(priv->buf, port->write_urb->transfer_buffer, 296 port->bulk_out_size); 297 298 if (count == 0) { 299 spin_unlock_irqrestore(&priv->lock, flags); 300 return; 301 } 302 303 priv->write_urb_in_use = 1; 304 305 spin_unlock_irqrestore(&priv->lock, flags); 306 307 usb_serial_debug_data(debug, &port->dev, __FUNCTION__, count, port->write_urb->transfer_buffer); 308 309 port->write_urb->transfer_buffer_length = count; 310 port->write_urb->dev = port->serial->dev; 311 result = usb_submit_urb (port->write_urb, GFP_ATOMIC); 312 if (result) { 313 dev_err(&port->dev, "%s - failed submitting write urb, error %d\n", __FUNCTION__, result); 314 priv->write_urb_in_use = 0; 315 // TODO: reschedule pl2303_send 316 } 317 318 usb_serial_port_softint(port); 319} 320 321static int pl2303_write_room(struct usb_serial_port *port) 322{ 323 struct pl2303_private *priv = usb_get_serial_port_data(port); 324 int room = 0; 325 unsigned long flags; 326 327 dbg("%s - port %d", __FUNCTION__, port->number); 328 329 spin_lock_irqsave(&priv->lock, flags); 330 room = pl2303_buf_space_avail(priv->buf); 331 spin_unlock_irqrestore(&priv->lock, flags); 332 333 dbg("%s - returns %d", __FUNCTION__, room); 334 return room; 335} 336 337static int pl2303_chars_in_buffer(struct usb_serial_port *port) 338{ 339 struct pl2303_private *priv = usb_get_serial_port_data(port); 340 int chars = 0; 341 unsigned long flags; 342 343 dbg("%s - port %d", __FUNCTION__, port->number); 344 345 spin_lock_irqsave(&priv->lock, flags); 346 chars = pl2303_buf_data_avail(priv->buf); 347 spin_unlock_irqrestore(&priv->lock, flags); 348 349 dbg("%s - returns %d", __FUNCTION__, chars); 350 return chars; 351} 352 353static void pl2303_set_termios (struct usb_serial_port *port, struct termios *old_termios) 354{ 355 struct usb_serial *serial = port->serial; 356 struct pl2303_private *priv = usb_get_serial_port_data(port); 357 unsigned long flags; 358 unsigned int cflag; 359 unsigned char *buf; 360 int baud; 361 int i; 362 u8 control; 363 364 dbg("%s - port %d", __FUNCTION__, port->number); 365 366 if ((!port->tty) || (!port->tty->termios)) { 367 dbg("%s - no tty structures", __FUNCTION__); 368 return; 369 } 370 371 spin_lock_irqsave(&priv->lock, flags); 372 if (!priv->termios_initialized) { 373 *(port->tty->termios) = tty_std_termios; 374 port->tty->termios->c_cflag = B9600 | CS8 | CREAD | HUPCL | CLOCAL; 375 priv->termios_initialized = 1; 376 } 377 spin_unlock_irqrestore(&priv->lock, flags); 378 379 cflag = port->tty->termios->c_cflag; 380 /* check that they really want us to change something */ 381 if (old_termios) { 382 if ((cflag == old_termios->c_cflag) && 383 (RELEVANT_IFLAG(port->tty->termios->c_iflag) == RELEVANT_IFLAG(old_termios->c_iflag))) { 384 dbg("%s - nothing to change...", __FUNCTION__); 385 return; 386 } 387 } 388 389 buf = kzalloc (7, GFP_KERNEL); 390 if (!buf) { 391 dev_err(&port->dev, "%s - out of memory.\n", __FUNCTION__); 392 return; 393 } 394 395 i = usb_control_msg (serial->dev, usb_rcvctrlpipe (serial->dev, 0), 396 GET_LINE_REQUEST, GET_LINE_REQUEST_TYPE, 397 0, 0, buf, 7, 100); 398 dbg ("0xa1:0x21:0:0 %d - %x %x %x %x %x %x %x", i, 399 buf[0], buf[1], buf[2], buf[3], buf[4], buf[5], buf[6]); 400 401 402 if (cflag & CSIZE) { 403 switch (cflag & CSIZE) { 404 case CS5: buf[6] = 5; break; 405 case CS6: buf[6] = 6; break; 406 case CS7: buf[6] = 7; break; 407 default: 408 case CS8: buf[6] = 8; break; 409 } 410 dbg("%s - data bits = %d", __FUNCTION__, buf[6]); 411 } 412 413 baud = 0; 414 switch (cflag & CBAUD) { 415 case B0: baud = 0; break; 416 case B75: baud = 75; break; 417 case B150: baud = 150; break; 418 case B300: baud = 300; break; 419 case B600: baud = 600; break; 420 case B1200: baud = 1200; break; 421 case B1800: baud = 1800; break; 422 case B2400: baud = 2400; break; 423 case B4800: baud = 4800; break; 424 case B9600: baud = 9600; break; 425 case B19200: baud = 19200; break; 426 case B38400: baud = 38400; break; 427 case B57600: baud = 57600; break; 428 case B115200: baud = 115200; break; 429 case B230400: baud = 230400; break; 430 case B460800: baud = 460800; break; 431 default: 432 dev_err(&port->dev, "pl2303 driver does not support the baudrate requested (fix it)\n"); 433 break; 434 } 435 dbg("%s - baud = %d", __FUNCTION__, baud); 436 if (baud) { 437 buf[0] = baud & 0xff; 438 buf[1] = (baud >> 8) & 0xff; 439 buf[2] = (baud >> 16) & 0xff; 440 buf[3] = (baud >> 24) & 0xff; 441 } 442 443 /* For reference buf[4]=0 is 1 stop bits */ 444 /* For reference buf[4]=1 is 1.5 stop bits */ 445 /* For reference buf[4]=2 is 2 stop bits */ 446 if (cflag & CSTOPB) { 447 buf[4] = 2; 448 dbg("%s - stop bits = 2", __FUNCTION__); 449 } else { 450 buf[4] = 0; 451 dbg("%s - stop bits = 1", __FUNCTION__); 452 } 453 454 if (cflag & PARENB) { 455 /* For reference buf[5]=0 is none parity */ 456 /* For reference buf[5]=1 is odd parity */ 457 /* For reference buf[5]=2 is even parity */ 458 /* For reference buf[5]=3 is mark parity */ 459 /* For reference buf[5]=4 is space parity */ 460 if (cflag & PARODD) { 461 buf[5] = 1; 462 dbg("%s - parity = odd", __FUNCTION__); 463 } else { 464 buf[5] = 2; 465 dbg("%s - parity = even", __FUNCTION__); 466 } 467 } else { 468 buf[5] = 0; 469 dbg("%s - parity = none", __FUNCTION__); 470 } 471 472 i = usb_control_msg (serial->dev, usb_sndctrlpipe (serial->dev, 0), 473 SET_LINE_REQUEST, SET_LINE_REQUEST_TYPE, 474 0, 0, buf, 7, 100); 475 dbg ("0x21:0x20:0:0 %d", i); 476 477 /* change control lines if we are switching to or from B0 */ 478 spin_lock_irqsave(&priv->lock, flags); 479 control = priv->line_control; 480 if ((cflag & CBAUD) == B0) 481 priv->line_control &= ~(CONTROL_DTR | CONTROL_RTS); 482 else 483 priv->line_control |= (CONTROL_DTR | CONTROL_RTS); 484 if (control != priv->line_control) { 485 control = priv->line_control; 486 spin_unlock_irqrestore(&priv->lock, flags); 487 set_control_lines(serial->dev, control); 488 } else { 489 spin_unlock_irqrestore(&priv->lock, flags); 490 } 491 492 buf[0] = buf[1] = buf[2] = buf[3] = buf[4] = buf[5] = buf[6] = 0; 493 494 i = usb_control_msg (serial->dev, usb_rcvctrlpipe (serial->dev, 0), 495 GET_LINE_REQUEST, GET_LINE_REQUEST_TYPE, 496 0, 0, buf, 7, 100); 497 dbg ("0xa1:0x21:0:0 %d - %x %x %x %x %x %x %x", i, 498 buf[0], buf[1], buf[2], buf[3], buf[4], buf[5], buf[6]); 499 500 if (cflag & CRTSCTS) { 501 __u16 index; 502 if (priv->type == HX) 503 index = 0x61; 504 else 505 index = 0x41; 506 i = usb_control_msg(serial->dev, 507 usb_sndctrlpipe(serial->dev, 0), 508 VENDOR_WRITE_REQUEST, 509 VENDOR_WRITE_REQUEST_TYPE, 510 0x0, index, NULL, 0, 100); 511 dbg ("0x40:0x1:0x0:0x%x %d", index, i); 512 } 513 514 kfree (buf); 515} 516 517static int pl2303_open (struct usb_serial_port *port, struct file *filp) 518{ 519 struct termios tmp_termios; 520 struct usb_serial *serial = port->serial; 521 struct pl2303_private *priv = usb_get_serial_port_data(port); 522 unsigned char *buf; 523 int result; 524 525 dbg("%s - port %d", __FUNCTION__, port->number); 526 527 if (priv->type != HX) { 528 usb_clear_halt(serial->dev, port->write_urb->pipe); 529 usb_clear_halt(serial->dev, port->read_urb->pipe); 530 } 531 532 buf = kmalloc(10, GFP_KERNEL); 533 if (buf==NULL) 534 return -ENOMEM; 535 536#define FISH(a,b,c,d) \ 537 result=usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev,0), \ 538 b, a, c, d, buf, 1, 100); \ 539 dbg("0x%x:0x%x:0x%x:0x%x %d - %x",a,b,c,d,result,buf[0]); 540 541#define SOUP(a,b,c,d) \ 542 result=usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev,0), \ 543 b, a, c, d, NULL, 0, 100); \ 544 dbg("0x%x:0x%x:0x%x:0x%x %d",a,b,c,d,result); 545 546 FISH (VENDOR_READ_REQUEST_TYPE, VENDOR_READ_REQUEST, 0x8484, 0); 547 SOUP (VENDOR_WRITE_REQUEST_TYPE, VENDOR_WRITE_REQUEST, 0x0404, 0); 548 FISH (VENDOR_READ_REQUEST_TYPE, VENDOR_READ_REQUEST, 0x8484, 0); 549 FISH (VENDOR_READ_REQUEST_TYPE, VENDOR_READ_REQUEST, 0x8383, 0); 550 FISH (VENDOR_READ_REQUEST_TYPE, VENDOR_READ_REQUEST, 0x8484, 0); 551 SOUP (VENDOR_WRITE_REQUEST_TYPE, VENDOR_WRITE_REQUEST, 0x0404, 1); 552 FISH (VENDOR_READ_REQUEST_TYPE, VENDOR_READ_REQUEST, 0x8484, 0); 553 FISH (VENDOR_READ_REQUEST_TYPE, VENDOR_READ_REQUEST, 0x8383, 0); 554 SOUP (VENDOR_WRITE_REQUEST_TYPE, VENDOR_WRITE_REQUEST, 0, 1); 555 SOUP (VENDOR_WRITE_REQUEST_TYPE, VENDOR_WRITE_REQUEST, 1, 0); 556 557 if (priv->type == HX) { 558 /* HX chip */ 559 SOUP (VENDOR_WRITE_REQUEST_TYPE, VENDOR_WRITE_REQUEST, 2, 0x44); 560 /* reset upstream data pipes */ 561 SOUP (VENDOR_WRITE_REQUEST_TYPE, VENDOR_WRITE_REQUEST, 8, 0); 562 SOUP (VENDOR_WRITE_REQUEST_TYPE, VENDOR_WRITE_REQUEST, 9, 0); 563 } else { 564 SOUP (VENDOR_WRITE_REQUEST_TYPE, VENDOR_WRITE_REQUEST, 2, 0x24); 565 } 566 567 kfree(buf); 568 569 /* Setup termios */ 570 if (port->tty) { 571 pl2303_set_termios (port, &tmp_termios); 572 } 573 574 //FIXME: need to assert RTS and DTR if CRTSCTS off 575 576 dbg("%s - submitting read urb", __FUNCTION__); 577 port->read_urb->dev = serial->dev; 578 result = usb_submit_urb (port->read_urb, GFP_KERNEL); 579 if (result) { 580 dev_err(&port->dev, "%s - failed submitting read urb, error %d\n", __FUNCTION__, result); 581 pl2303_close (port, NULL); 582 return -EPROTO; 583 } 584 585 dbg("%s - submitting interrupt urb", __FUNCTION__); 586 port->interrupt_in_urb->dev = serial->dev; 587 result = usb_submit_urb (port->interrupt_in_urb, GFP_KERNEL); 588 if (result) { 589 dev_err(&port->dev, "%s - failed submitting interrupt urb, error %d\n", __FUNCTION__, result); 590 pl2303_close (port, NULL); 591 return -EPROTO; 592 } 593 return 0; 594} 595 596 597static void pl2303_close (struct usb_serial_port *port, struct file *filp) 598{ 599 struct pl2303_private *priv = usb_get_serial_port_data(port); 600 unsigned long flags; 601 unsigned int c_cflag; 602 int bps; 603 long timeout; 604 wait_queue_t wait; 605 606 dbg("%s - port %d", __FUNCTION__, port->number); 607 608 /* wait for data to drain from the buffer */ 609 spin_lock_irqsave(&priv->lock, flags); 610 timeout = PL2303_CLOSING_WAIT; 611 init_waitqueue_entry(&wait, current); 612 add_wait_queue(&port->tty->write_wait, &wait); 613 for (;;) { 614 set_current_state(TASK_INTERRUPTIBLE); 615 if (pl2303_buf_data_avail(priv->buf) == 0 616 || timeout == 0 || signal_pending(current) 617 || !usb_get_intfdata(port->serial->interface)) /* disconnect */ 618 break; 619 spin_unlock_irqrestore(&priv->lock, flags); 620 timeout = schedule_timeout(timeout); 621 spin_lock_irqsave(&priv->lock, flags); 622 } 623 set_current_state(TASK_RUNNING); 624 remove_wait_queue(&port->tty->write_wait, &wait); 625 /* clear out any remaining data in the buffer */ 626 pl2303_buf_clear(priv->buf); 627 spin_unlock_irqrestore(&priv->lock, flags); 628 629 /* wait for characters to drain from the device */ 630 /* (this is long enough for the entire 256 byte */ 631 /* pl2303 hardware buffer to drain with no flow */ 632 /* control for data rates of 1200 bps or more, */ 633 /* for lower rates we should really know how much */ 634 /* data is in the buffer to compute a delay */ 635 /* that is not unnecessarily long) */ 636 bps = tty_get_baud_rate(port->tty); 637 if (bps > 1200) 638 timeout = max((HZ*2560)/bps,HZ/10); 639 else 640 timeout = 2*HZ; 641 schedule_timeout_interruptible(timeout); 642 643 /* shutdown our urbs */ 644 dbg("%s - shutting down urbs", __FUNCTION__); 645 usb_kill_urb(port->write_urb); 646 usb_kill_urb(port->read_urb); 647 usb_kill_urb(port->interrupt_in_urb); 648 649 if (port->tty) { 650 c_cflag = port->tty->termios->c_cflag; 651 if (c_cflag & HUPCL) { 652 /* drop DTR and RTS */ 653 spin_lock_irqsave(&priv->lock, flags); 654 priv->line_control = 0; 655 spin_unlock_irqrestore (&priv->lock, flags); 656 set_control_lines (port->serial->dev, 0); 657 } 658 } 659} 660 661static int pl2303_tiocmset (struct usb_serial_port *port, struct file *file, 662 unsigned int set, unsigned int clear) 663{ 664 struct pl2303_private *priv = usb_get_serial_port_data(port); 665 unsigned long flags; 666 u8 control; 667 668 if (!usb_get_intfdata(port->serial->interface)) 669 return -ENODEV; 670 671 spin_lock_irqsave (&priv->lock, flags); 672 if (set & TIOCM_RTS) 673 priv->line_control |= CONTROL_RTS; 674 if (set & TIOCM_DTR) 675 priv->line_control |= CONTROL_DTR; 676 if (clear & TIOCM_RTS) 677 priv->line_control &= ~CONTROL_RTS; 678 if (clear & TIOCM_DTR) 679 priv->line_control &= ~CONTROL_DTR; 680 control = priv->line_control; 681 spin_unlock_irqrestore (&priv->lock, flags); 682 683 return set_control_lines (port->serial->dev, control); 684} 685 686static int pl2303_tiocmget (struct usb_serial_port *port, struct file *file) 687{ 688 struct pl2303_private *priv = usb_get_serial_port_data(port); 689 unsigned long flags; 690 unsigned int mcr; 691 unsigned int status; 692 unsigned int result; 693 694 dbg("%s (%d)", __FUNCTION__, port->number); 695 696 if (!usb_get_intfdata(port->serial->interface)) 697 return -ENODEV; 698 699 spin_lock_irqsave (&priv->lock, flags); 700 mcr = priv->line_control; 701 status = priv->line_status; 702 spin_unlock_irqrestore (&priv->lock, flags); 703 704 result = ((mcr & CONTROL_DTR) ? TIOCM_DTR : 0) 705 | ((mcr & CONTROL_RTS) ? TIOCM_RTS : 0) 706 | ((status & UART_CTS) ? TIOCM_CTS : 0) 707 | ((status & UART_DSR) ? TIOCM_DSR : 0) 708 | ((status & UART_RING) ? TIOCM_RI : 0) 709 | ((status & UART_DCD) ? TIOCM_CD : 0); 710 711 dbg("%s - result = %x", __FUNCTION__, result); 712 713 return result; 714} 715 716static int wait_modem_info(struct usb_serial_port *port, unsigned int arg) 717{ 718 struct pl2303_private *priv = usb_get_serial_port_data(port); 719 unsigned long flags; 720 unsigned int prevstatus; 721 unsigned int status; 722 unsigned int changed; 723 724 spin_lock_irqsave (&priv->lock, flags); 725 prevstatus = priv->line_status; 726 spin_unlock_irqrestore (&priv->lock, flags); 727 728 while (1) { 729 interruptible_sleep_on(&priv->delta_msr_wait); 730 /* see if a signal did it */ 731 if (signal_pending(current)) 732 return -ERESTARTSYS; 733 734 spin_lock_irqsave (&priv->lock, flags); 735 status = priv->line_status; 736 spin_unlock_irqrestore (&priv->lock, flags); 737 738 changed=prevstatus^status; 739 740 if (((arg & TIOCM_RNG) && (changed & UART_RING)) || 741 ((arg & TIOCM_DSR) && (changed & UART_DSR)) || 742 ((arg & TIOCM_CD) && (changed & UART_DCD)) || 743 ((arg & TIOCM_CTS) && (changed & UART_CTS)) ) { 744 return 0; 745 } 746 prevstatus = status; 747 } 748 /* NOTREACHED */ 749 return 0; 750} 751 752static int pl2303_ioctl (struct usb_serial_port *port, struct file *file, unsigned int cmd, unsigned long arg) 753{ 754 dbg("%s (%d) cmd = 0x%04x", __FUNCTION__, port->number, cmd); 755 756 switch (cmd) { 757 case TIOCMIWAIT: 758 dbg("%s (%d) TIOCMIWAIT", __FUNCTION__, port->number); 759 return wait_modem_info(port, arg); 760 761 default: 762 dbg("%s not supported = 0x%04x", __FUNCTION__, cmd); 763 break; 764 } 765 766 return -ENOIOCTLCMD; 767} 768 769static void pl2303_break_ctl (struct usb_serial_port *port, int break_state) 770{ 771 struct usb_serial *serial = port->serial; 772 u16 state; 773 int result; 774 775 dbg("%s - port %d", __FUNCTION__, port->number); 776 777 if (break_state == 0) 778 state = BREAK_OFF; 779 else 780 state = BREAK_ON; 781 dbg("%s - turning break %s", __FUNCTION__, state==BREAK_OFF ? "off" : "on"); 782 783 result = usb_control_msg (serial->dev, usb_sndctrlpipe (serial->dev, 0), 784 BREAK_REQUEST, BREAK_REQUEST_TYPE, state, 785 0, NULL, 0, 100); 786 if (result) 787 dbg("%s - error sending break = %d", __FUNCTION__, result); 788} 789 790 791static void pl2303_shutdown (struct usb_serial *serial) 792{ 793 int i; 794 struct pl2303_private *priv; 795 796 dbg("%s", __FUNCTION__); 797 798 for (i = 0; i < serial->num_ports; ++i) { 799 priv = usb_get_serial_port_data(serial->port[i]); 800 if (priv) { 801 pl2303_buf_free(priv->buf); 802 kfree(priv); 803 usb_set_serial_port_data(serial->port[i], NULL); 804 } 805 } 806} 807 808static void pl2303_update_line_status(struct usb_serial_port *port, 809 unsigned char *data, 810 unsigned int actual_length) 811{ 812 813 struct pl2303_private *priv = usb_get_serial_port_data(port); 814 unsigned long flags; 815 u8 status_idx = UART_STATE; 816 u8 length = UART_STATE + 1; 817 818 if ((le16_to_cpu(port->serial->dev->descriptor.idVendor) == SIEMENS_VENDOR_ID) && 819 (le16_to_cpu(port->serial->dev->descriptor.idProduct) == SIEMENS_PRODUCT_ID_X65 || 820 le16_to_cpu(port->serial->dev->descriptor.idProduct) == SIEMENS_PRODUCT_ID_SX1 || 821 le16_to_cpu(port->serial->dev->descriptor.idProduct) == SIEMENS_PRODUCT_ID_X75)) { 822 length = 1; 823 status_idx = 0; 824 } 825 826 if (actual_length < length) 827 goto exit; 828 829 /* Save off the uart status for others to look at */ 830 spin_lock_irqsave(&priv->lock, flags); 831 priv->line_status = data[status_idx]; 832 spin_unlock_irqrestore(&priv->lock, flags); 833 wake_up_interruptible (&priv->delta_msr_wait); 834 835exit: 836 return; 837} 838 839static void pl2303_read_int_callback (struct urb *urb, struct pt_regs *regs) 840{ 841 struct usb_serial_port *port = (struct usb_serial_port *) urb->context; 842 unsigned char *data = urb->transfer_buffer; 843 unsigned int actual_length = urb->actual_length; 844 int status; 845 846 dbg("%s (%d)", __FUNCTION__, port->number); 847 848 switch (urb->status) { 849 case 0: 850 /* success */ 851 break; 852 case -ECONNRESET: 853 case -ENOENT: 854 case -ESHUTDOWN: 855 /* this urb is terminated, clean up */ 856 dbg("%s - urb shutting down with status: %d", __FUNCTION__, urb->status); 857 return; 858 default: 859 dbg("%s - nonzero urb status received: %d", __FUNCTION__, urb->status); 860 goto exit; 861 } 862 863 usb_serial_debug_data(debug, &port->dev, __FUNCTION__, urb->actual_length, urb->transfer_buffer); 864 pl2303_update_line_status(port, data, actual_length); 865 866exit: 867 status = usb_submit_urb (urb, GFP_ATOMIC); 868 if (status) 869 dev_err(&urb->dev->dev, "%s - usb_submit_urb failed with result %d\n", 870 __FUNCTION__, status); 871} 872 873 874static void pl2303_read_bulk_callback (struct urb *urb, struct pt_regs *regs) 875{ 876 struct usb_serial_port *port = (struct usb_serial_port *) urb->context; 877 struct pl2303_private *priv = usb_get_serial_port_data(port); 878 struct tty_struct *tty; 879 unsigned char *data = urb->transfer_buffer; 880 unsigned long flags; 881 int i; 882 int result; 883 u8 status; 884 char tty_flag; 885 886 dbg("%s - port %d", __FUNCTION__, port->number); 887 888 if (urb->status) { 889 dbg("%s - urb->status = %d", __FUNCTION__, urb->status); 890 if (!port->open_count) { 891 dbg("%s - port is closed, exiting.", __FUNCTION__); 892 return; 893 } 894 if (urb->status == -EPROTO) { 895 /* PL2303 mysteriously fails with -EPROTO reschedule the read */ 896 dbg("%s - caught -EPROTO, resubmitting the urb", __FUNCTION__); 897 urb->status = 0; 898 urb->dev = port->serial->dev; 899 result = usb_submit_urb(urb, GFP_ATOMIC); 900 if (result) 901 dev_err(&urb->dev->dev, "%s - failed resubmitting read urb, error %d\n", __FUNCTION__, result); 902 return; 903 } 904 dbg("%s - unable to handle the error, exiting.", __FUNCTION__); 905 return; 906 } 907 908 usb_serial_debug_data(debug, &port->dev, __FUNCTION__, urb->actual_length, data); 909 910 /* get tty_flag from status */ 911 tty_flag = TTY_NORMAL; 912 913 spin_lock_irqsave(&priv->lock, flags); 914 status = priv->line_status; 915 priv->line_status &= ~UART_STATE_TRANSIENT_MASK; 916 spin_unlock_irqrestore(&priv->lock, flags); 917 wake_up_interruptible (&priv->delta_msr_wait); 918 919 /* break takes precedence over parity, */ 920 /* which takes precedence over framing errors */ 921 if (status & UART_BREAK_ERROR ) 922 tty_flag = TTY_BREAK; 923 else if (status & UART_PARITY_ERROR) 924 tty_flag = TTY_PARITY; 925 else if (status & UART_FRAME_ERROR) 926 tty_flag = TTY_FRAME; 927 dbg("%s - tty_flag = %d", __FUNCTION__, tty_flag); 928 929 tty = port->tty; 930 if (tty && urb->actual_length) { 931 tty_buffer_request_room(tty, urb->actual_length + 1); 932 /* overrun is special, not associated with a char */ 933 if (status & UART_OVERRUN_ERROR) 934 tty_insert_flip_char(tty, 0, TTY_OVERRUN); 935 for (i = 0; i < urb->actual_length; ++i) 936 tty_insert_flip_char (tty, data[i], tty_flag); 937 tty_flip_buffer_push (tty); 938 } 939 940 /* Schedule the next read _if_ we are still open */ 941 if (port->open_count) { 942 urb->dev = port->serial->dev; 943 result = usb_submit_urb(urb, GFP_ATOMIC); 944 if (result) 945 dev_err(&urb->dev->dev, "%s - failed resubmitting read urb, error %d\n", __FUNCTION__, result); 946 } 947 948 return; 949} 950 951 952 953static void pl2303_write_bulk_callback (struct urb *urb, struct pt_regs *regs) 954{ 955 struct usb_serial_port *port = (struct usb_serial_port *) urb->context; 956 struct pl2303_private *priv = usb_get_serial_port_data(port); 957 int result; 958 959 dbg("%s - port %d", __FUNCTION__, port->number); 960 961 switch (urb->status) { 962 case 0: 963 /* success */ 964 break; 965 case -ECONNRESET: 966 case -ENOENT: 967 case -ESHUTDOWN: 968 /* this urb is terminated, clean up */ 969 dbg("%s - urb shutting down with status: %d", __FUNCTION__, urb->status); 970 priv->write_urb_in_use = 0; 971 return; 972 default: 973 /* error in the urb, so we have to resubmit it */ 974 dbg("%s - Overflow in write", __FUNCTION__); 975 dbg("%s - nonzero write bulk status received: %d", __FUNCTION__, urb->status); 976 port->write_urb->transfer_buffer_length = 1; 977 port->write_urb->dev = port->serial->dev; 978 result = usb_submit_urb (port->write_urb, GFP_ATOMIC); 979 if (result) 980 dev_err(&urb->dev->dev, "%s - failed resubmitting write urb, error %d\n", __FUNCTION__, result); 981 else 982 return; 983 } 984 985 priv->write_urb_in_use = 0; 986 987 /* send any buffered data */ 988 pl2303_send(port); 989} 990 991 992/* 993 * pl2303_buf_alloc 994 * 995 * Allocate a circular buffer and all associated memory. 996 */ 997 998static struct pl2303_buf *pl2303_buf_alloc(unsigned int size) 999{ 1000 1001 struct pl2303_buf *pb; 1002 1003 1004 if (size == 0) 1005 return NULL; 1006 1007 pb = (struct pl2303_buf *)kmalloc(sizeof(struct pl2303_buf), GFP_KERNEL); 1008 if (pb == NULL) 1009 return NULL; 1010 1011 pb->buf_buf = kmalloc(size, GFP_KERNEL); 1012 if (pb->buf_buf == NULL) { 1013 kfree(pb); 1014 return NULL; 1015 } 1016 1017 pb->buf_size = size; 1018 pb->buf_get = pb->buf_put = pb->buf_buf; 1019 1020 return pb; 1021 1022} 1023 1024 1025/* 1026 * pl2303_buf_free 1027 * 1028 * Free the buffer and all associated memory. 1029 */ 1030 1031static void pl2303_buf_free(struct pl2303_buf *pb) 1032{ 1033 if (pb) { 1034 kfree(pb->buf_buf); 1035 kfree(pb); 1036 } 1037} 1038 1039 1040/* 1041 * pl2303_buf_clear 1042 * 1043 * Clear out all data in the circular buffer. 1044 */ 1045 1046static void pl2303_buf_clear(struct pl2303_buf *pb) 1047{ 1048 if (pb != NULL) 1049 pb->buf_get = pb->buf_put; 1050 /* equivalent to a get of all data available */ 1051} 1052 1053 1054/* 1055 * pl2303_buf_data_avail 1056 * 1057 * Return the number of bytes of data available in the circular 1058 * buffer. 1059 */ 1060 1061static unsigned int pl2303_buf_data_avail(struct pl2303_buf *pb) 1062{ 1063 if (pb != NULL) 1064 return ((pb->buf_size + pb->buf_put - pb->buf_get) % pb->buf_size); 1065 else 1066 return 0; 1067} 1068 1069 1070/* 1071 * pl2303_buf_space_avail 1072 * 1073 * Return the number of bytes of space available in the circular 1074 * buffer. 1075 */ 1076 1077static unsigned int pl2303_buf_space_avail(struct pl2303_buf *pb) 1078{ 1079 if (pb != NULL) 1080 return ((pb->buf_size + pb->buf_get - pb->buf_put - 1) % pb->buf_size); 1081 else 1082 return 0; 1083} 1084 1085 1086/* 1087 * pl2303_buf_put 1088 * 1089 * Copy data data from a user buffer and put it into the circular buffer. 1090 * Restrict to the amount of space available. 1091 * 1092 * Return the number of bytes copied. 1093 */ 1094 1095static unsigned int pl2303_buf_put(struct pl2303_buf *pb, const char *buf, 1096 unsigned int count) 1097{ 1098 1099 unsigned int len; 1100 1101 1102 if (pb == NULL) 1103 return 0; 1104 1105 len = pl2303_buf_space_avail(pb); 1106 if (count > len) 1107 count = len; 1108 1109 if (count == 0) 1110 return 0; 1111 1112 len = pb->buf_buf + pb->buf_size - pb->buf_put; 1113 if (count > len) { 1114 memcpy(pb->buf_put, buf, len); 1115 memcpy(pb->buf_buf, buf+len, count - len); 1116 pb->buf_put = pb->buf_buf + count - len; 1117 } else { 1118 memcpy(pb->buf_put, buf, count); 1119 if (count < len) 1120 pb->buf_put += count; 1121 else /* count == len */ 1122 pb->buf_put = pb->buf_buf; 1123 } 1124 1125 return count; 1126 1127} 1128 1129 1130/* 1131 * pl2303_buf_get 1132 * 1133 * Get data from the circular buffer and copy to the given buffer. 1134 * Restrict to the amount of data available. 1135 * 1136 * Return the number of bytes copied. 1137 */ 1138 1139static unsigned int pl2303_buf_get(struct pl2303_buf *pb, char *buf, 1140 unsigned int count) 1141{ 1142 1143 unsigned int len; 1144 1145 1146 if (pb == NULL) 1147 return 0; 1148 1149 len = pl2303_buf_data_avail(pb); 1150 if (count > len) 1151 count = len; 1152 1153 if (count == 0) 1154 return 0; 1155 1156 len = pb->buf_buf + pb->buf_size - pb->buf_get; 1157 if (count > len) { 1158 memcpy(buf, pb->buf_get, len); 1159 memcpy(buf+len, pb->buf_buf, count - len); 1160 pb->buf_get = pb->buf_buf + count - len; 1161 } else { 1162 memcpy(buf, pb->buf_get, count); 1163 if (count < len) 1164 pb->buf_get += count; 1165 else /* count == len */ 1166 pb->buf_get = pb->buf_buf; 1167 } 1168 1169 return count; 1170 1171} 1172 1173static int __init pl2303_init (void) 1174{ 1175 int retval; 1176 retval = usb_serial_register(&pl2303_device); 1177 if (retval) 1178 goto failed_usb_serial_register; 1179 retval = usb_register(&pl2303_driver); 1180 if (retval) 1181 goto failed_usb_register; 1182 info(DRIVER_DESC); 1183 return 0; 1184failed_usb_register: 1185 usb_serial_deregister(&pl2303_device); 1186failed_usb_serial_register: 1187 return retval; 1188} 1189 1190 1191static void __exit pl2303_exit (void) 1192{ 1193 usb_deregister (&pl2303_driver); 1194 usb_serial_deregister (&pl2303_device); 1195} 1196 1197 1198module_init(pl2303_init); 1199module_exit(pl2303_exit); 1200 1201MODULE_DESCRIPTION(DRIVER_DESC); 1202MODULE_LICENSE("GPL"); 1203 1204module_param(debug, bool, S_IRUGO | S_IWUSR); 1205MODULE_PARM_DESC(debug, "Debug enabled or not"); 1206 1207