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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
39static int debug;
40
41#define PL2303_CLOSING_WAIT (30*HZ)
42
43static const struct usb_device_id id_table[] = {
44 { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID) },
45 { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_RSAQ2) },
46 { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_DCU11) },
47 { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_RSAQ3) },
48 { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_PHAROS) },
49 { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_ALDIGA) },
50 { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_MMX) },
51 { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_GPRS) },
52 { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_HCR331) },
53 { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_MOTOROLA) },
54 { USB_DEVICE(IODATA_VENDOR_ID, IODATA_PRODUCT_ID) },
55 { USB_DEVICE(IODATA_VENDOR_ID, IODATA_PRODUCT_ID_RSAQ5) },
56 { USB_DEVICE(ATEN_VENDOR_ID, ATEN_PRODUCT_ID) },
57 { USB_DEVICE(ATEN_VENDOR_ID2, ATEN_PRODUCT_ID) },
58 { USB_DEVICE(ELCOM_VENDOR_ID, ELCOM_PRODUCT_ID) },
59 { USB_DEVICE(ELCOM_VENDOR_ID, ELCOM_PRODUCT_ID_UCSGT) },
60 { USB_DEVICE(ITEGNO_VENDOR_ID, ITEGNO_PRODUCT_ID) },
61 { USB_DEVICE(ITEGNO_VENDOR_ID, ITEGNO_PRODUCT_ID_2080) },
62 { USB_DEVICE(MA620_VENDOR_ID, MA620_PRODUCT_ID) },
63 { USB_DEVICE(RATOC_VENDOR_ID, RATOC_PRODUCT_ID) },
64 { USB_DEVICE(TRIPP_VENDOR_ID, TRIPP_PRODUCT_ID) },
65 { USB_DEVICE(RADIOSHACK_VENDOR_ID, RADIOSHACK_PRODUCT_ID) },
66 { USB_DEVICE(DCU10_VENDOR_ID, DCU10_PRODUCT_ID) },
67 { USB_DEVICE(SITECOM_VENDOR_ID, SITECOM_PRODUCT_ID) },
68 { USB_DEVICE(ALCATEL_VENDOR_ID, ALCATEL_PRODUCT_ID) },
69 { USB_DEVICE(SAMSUNG_VENDOR_ID, SAMSUNG_PRODUCT_ID) },
70 { USB_DEVICE(SIEMENS_VENDOR_ID, SIEMENS_PRODUCT_ID_SX1) },
71 { USB_DEVICE(SIEMENS_VENDOR_ID, SIEMENS_PRODUCT_ID_X65) },
72 { USB_DEVICE(SIEMENS_VENDOR_ID, SIEMENS_PRODUCT_ID_X75) },
73 { USB_DEVICE(SIEMENS_VENDOR_ID, SIEMENS_PRODUCT_ID_EF81) },
74 { USB_DEVICE(BENQ_VENDOR_ID, BENQ_PRODUCT_ID_S81) }, /* Benq/Siemens S81 */
75 { USB_DEVICE(SYNTECH_VENDOR_ID, SYNTECH_PRODUCT_ID) },
76 { USB_DEVICE(NOKIA_CA42_VENDOR_ID, NOKIA_CA42_PRODUCT_ID) },
77 { USB_DEVICE(CA_42_CA42_VENDOR_ID, CA_42_CA42_PRODUCT_ID) },
78 { USB_DEVICE(SAGEM_VENDOR_ID, SAGEM_PRODUCT_ID) },
79 { USB_DEVICE(LEADTEK_VENDOR_ID, LEADTEK_9531_PRODUCT_ID) },
80 { USB_DEVICE(SPEEDDRAGON_VENDOR_ID, SPEEDDRAGON_PRODUCT_ID) },
81 { USB_DEVICE(DATAPILOT_U2_VENDOR_ID, DATAPILOT_U2_PRODUCT_ID) },
82 { USB_DEVICE(BELKIN_VENDOR_ID, BELKIN_PRODUCT_ID) },
83 { USB_DEVICE(ALCOR_VENDOR_ID, ALCOR_PRODUCT_ID) },
84 { USB_DEVICE(WS002IN_VENDOR_ID, WS002IN_PRODUCT_ID) },
85 { USB_DEVICE(COREGA_VENDOR_ID, COREGA_PRODUCT_ID) },
86 { USB_DEVICE(YCCABLE_VENDOR_ID, YCCABLE_PRODUCT_ID) },
87 { USB_DEVICE(SUPERIAL_VENDOR_ID, SUPERIAL_PRODUCT_ID) },
88 { USB_DEVICE(HP_VENDOR_ID, HP_LD220_PRODUCT_ID) },
89 { USB_DEVICE(CRESSI_VENDOR_ID, CRESSI_EDY_PRODUCT_ID) },
90 { USB_DEVICE(ZEAGLE_VENDOR_ID, ZEAGLE_N2ITION3_PRODUCT_ID) },
91 { USB_DEVICE(SONY_VENDOR_ID, SONY_QN3USB_PRODUCT_ID) },
92 { USB_DEVICE(SANWA_VENDOR_ID, SANWA_PRODUCT_ID) },
93 { USB_DEVICE(ADLINK_VENDOR_ID, ADLINK_ND6530_PRODUCT_ID) },
94 { USB_DEVICE(WINCHIPHEAD_VENDOR_ID, WINCHIPHEAD_USBSER_PRODUCT_ID) },
95 { } /* Terminating entry */
96};
97
98MODULE_DEVICE_TABLE(usb, id_table);
99
100static struct usb_driver pl2303_driver = {
101 .name = "pl2303",
102 .probe = usb_serial_probe,
103 .disconnect = usb_serial_disconnect,
104 .id_table = id_table,
105 .suspend = usb_serial_suspend,
106 .resume = usb_serial_resume,
107 .no_dynamic_id = 1,
108 .supports_autosuspend = 1,
109};
110
111#define SET_LINE_REQUEST_TYPE 0x21
112#define SET_LINE_REQUEST 0x20
113
114#define SET_CONTROL_REQUEST_TYPE 0x21
115#define SET_CONTROL_REQUEST 0x22
116#define CONTROL_DTR 0x01
117#define CONTROL_RTS 0x02
118
119#define BREAK_REQUEST_TYPE 0x21
120#define BREAK_REQUEST 0x23
121#define BREAK_ON 0xffff
122#define BREAK_OFF 0x0000
123
124#define GET_LINE_REQUEST_TYPE 0xa1
125#define GET_LINE_REQUEST 0x21
126
127#define VENDOR_WRITE_REQUEST_TYPE 0x40
128#define VENDOR_WRITE_REQUEST 0x01
129
130#define VENDOR_READ_REQUEST_TYPE 0xc0
131#define VENDOR_READ_REQUEST 0x01
132
133#define UART_STATE 0x08
134#define UART_STATE_TRANSIENT_MASK 0x74
135#define UART_DCD 0x01
136#define UART_DSR 0x02
137#define UART_BREAK_ERROR 0x04
138#define UART_RING 0x08
139#define UART_FRAME_ERROR 0x10
140#define UART_PARITY_ERROR 0x20
141#define UART_OVERRUN_ERROR 0x40
142#define UART_CTS 0x80
143
144
145enum pl2303_type {
146 type_0, /* don't know the difference between type 0 and */
147 type_1, /* type 1, until someone from prolific tells us... */
148 HX, /* HX version of the pl2303 chip */
149};
150
151struct pl2303_private {
152 spinlock_t lock;
153 wait_queue_head_t delta_msr_wait;
154 u8 line_control;
155 u8 line_status;
156 enum pl2303_type type;
157};
158
159static 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 dbg("0x%x:0x%x:0x%x:0x%x %d - %x", VENDOR_READ_REQUEST_TYPE,
166 VENDOR_READ_REQUEST, value, index, res, buf[0]);
167 return res;
168}
169
170static int pl2303_vendor_write(__u16 value, __u16 index,
171 struct usb_serial *serial)
172{
173 int res = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
174 VENDOR_WRITE_REQUEST, VENDOR_WRITE_REQUEST_TYPE,
175 value, index, NULL, 0, 100);
176 dbg("0x%x:0x%x:0x%x:0x%x %d", VENDOR_WRITE_REQUEST_TYPE,
177 VENDOR_WRITE_REQUEST, value, index, res);
178 return res;
179}
180
181static int pl2303_startup(struct usb_serial *serial)
182{
183 struct pl2303_private *priv;
184 enum pl2303_type type = type_0;
185 unsigned char *buf;
186 int i;
187
188 buf = kmalloc(10, GFP_KERNEL);
189 if (buf == NULL)
190 return -ENOMEM;
191
192 if (serial->dev->descriptor.bDeviceClass == 0x02)
193 type = type_0;
194 else if (serial->dev->descriptor.bMaxPacketSize0 == 0x40)
195 type = HX;
196 else if (serial->dev->descriptor.bDeviceClass == 0x00)
197 type = type_1;
198 else if (serial->dev->descriptor.bDeviceClass == 0xFF)
199 type = type_1;
200 dbg("device type: %d", type);
201
202 for (i = 0; i < serial->num_ports; ++i) {
203 priv = kzalloc(sizeof(struct pl2303_private), GFP_KERNEL);
204 if (!priv)
205 goto cleanup;
206 spin_lock_init(&priv->lock);
207 init_waitqueue_head(&priv->delta_msr_wait);
208 priv->type = type;
209 usb_set_serial_port_data(serial->port[i], priv);
210 }
211
212 pl2303_vendor_read(0x8484, 0, serial, buf);
213 pl2303_vendor_write(0x0404, 0, serial);
214 pl2303_vendor_read(0x8484, 0, serial, buf);
215 pl2303_vendor_read(0x8383, 0, serial, buf);
216 pl2303_vendor_read(0x8484, 0, serial, buf);
217 pl2303_vendor_write(0x0404, 1, serial);
218 pl2303_vendor_read(0x8484, 0, serial, buf);
219 pl2303_vendor_read(0x8383, 0, serial, buf);
220 pl2303_vendor_write(0, 1, serial);
221 pl2303_vendor_write(1, 0, serial);
222 if (type == HX)
223 pl2303_vendor_write(2, 0x44, serial);
224 else
225 pl2303_vendor_write(2, 0x24, serial);
226
227 kfree(buf);
228 return 0;
229
230cleanup:
231 kfree(buf);
232 for (--i; i >= 0; --i) {
233 priv = usb_get_serial_port_data(serial->port[i]);
234 kfree(priv);
235 usb_set_serial_port_data(serial->port[i], NULL);
236 }
237 return -ENOMEM;
238}
239
240static int set_control_lines(struct usb_device *dev, u8 value)
241{
242 int retval;
243
244 retval = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
245 SET_CONTROL_REQUEST, SET_CONTROL_REQUEST_TYPE,
246 value, 0, NULL, 0, 100);
247 dbg("%s - value = %d, retval = %d", __func__, value, retval);
248 return retval;
249}
250
251static void pl2303_set_termios(struct tty_struct *tty,
252 struct usb_serial_port *port, struct ktermios *old_termios)
253{
254 struct usb_serial *serial = port->serial;
255 struct pl2303_private *priv = usb_get_serial_port_data(port);
256 unsigned long flags;
257 unsigned int cflag;
258 unsigned char *buf;
259 int baud;
260 int i;
261 u8 control;
262 const int baud_sup[] = { 75, 150, 300, 600, 1200, 1800, 2400, 3600,
263 4800, 7200, 9600, 14400, 19200, 28800, 38400,
264 57600, 115200, 230400, 460800, 614400,
265 921600, 1228800, 2457600, 3000000, 6000000 };
266 int baud_floor, baud_ceil;
267 int k;
268
269 dbg("%s - port %d", __func__, port->number);
270
271 /* The PL2303 is reported to lose bytes if you change
272 serial settings even to the same values as before. Thus
273 we actually need to filter in this specific case */
274
275 if (!tty_termios_hw_change(tty->termios, old_termios))
276 return;
277
278 cflag = tty->termios->c_cflag;
279
280 buf = kzalloc(7, GFP_KERNEL);
281 if (!buf) {
282 dev_err(&port->dev, "%s - out of memory.\n", __func__);
283 /* Report back no change occurred */
284 *tty->termios = *old_termios;
285 return;
286 }
287
288 i = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
289 GET_LINE_REQUEST, GET_LINE_REQUEST_TYPE,
290 0, 0, buf, 7, 100);
291 dbg("0xa1:0x21:0:0 %d - %x %x %x %x %x %x %x", i,
292 buf[0], buf[1], buf[2], buf[3], buf[4], buf[5], buf[6]);
293
294 if (cflag & CSIZE) {
295 switch (cflag & CSIZE) {
296 case CS5:
297 buf[6] = 5;
298 break;
299 case CS6:
300 buf[6] = 6;
301 break;
302 case CS7:
303 buf[6] = 7;
304 break;
305 default:
306 case CS8:
307 buf[6] = 8;
308 break;
309 }
310 dbg("%s - data bits = %d", __func__, buf[6]);
311 }
312
313 /* For reference buf[0]:buf[3] baud rate value */
314 /* NOTE: Only the values defined in baud_sup are supported !
315 * => if unsupported values are set, the PL2303 seems to use
316 * 9600 baud (at least my PL2303X always does)
317 */
318 baud = tty_get_baud_rate(tty);
319 dbg("%s - baud requested = %d", __func__, baud);
320 if (baud) {
321 /* Set baudrate to nearest supported value */
322 for (k=0; k<ARRAY_SIZE(baud_sup); k++) {
323 if (baud_sup[k] / baud) {
324 baud_ceil = baud_sup[k];
325 if (k==0) {
326 baud = baud_ceil;
327 } else {
328 baud_floor = baud_sup[k-1];
329 if ((baud_ceil % baud)
330 > (baud % baud_floor))
331 baud = baud_floor;
332 else
333 baud = baud_ceil;
334 }
335 break;
336 }
337 }
338 if (baud > 1228800) {
339 /* type_0, type_1 only support up to 1228800 baud */
340 if (priv->type != HX)
341 baud = 1228800;
342 else if (baud > 6000000)
343 baud = 6000000;
344 }
345 dbg("%s - baud set = %d", __func__, baud);
346 if (baud <= 115200) {
347 buf[0] = baud & 0xff;
348 buf[1] = (baud >> 8) & 0xff;
349 buf[2] = (baud >> 16) & 0xff;
350 buf[3] = (baud >> 24) & 0xff;
351 } else {
352 /* apparently the formula for higher speeds is:
353 * baudrate = 12M * 32 / (2^buf[1]) / buf[0]
354 */
355 unsigned tmp = 12*1000*1000*32 / baud;
356 buf[3] = 0x80;
357 buf[2] = 0;
358 buf[1] = (tmp >= 256);
359 while (tmp >= 256) {
360 tmp >>= 2;
361 buf[1] <<= 1;
362 }
363 if (tmp > 256) {
364 tmp %= 256;
365 }
366 buf[0] = tmp;
367 }
368 }
369
370 /* For reference buf[4]=0 is 1 stop bits */
371 /* For reference buf[4]=1 is 1.5 stop bits */
372 /* For reference buf[4]=2 is 2 stop bits */
373 if (cflag & CSTOPB) {
374 /* NOTE: Comply with "real" UARTs / RS232:
375 * use 1.5 instead of 2 stop bits with 5 data bits
376 */
377 if ((cflag & CSIZE) == CS5) {
378 buf[4] = 1;
379 dbg("%s - stop bits = 1.5", __func__);
380 } else {
381 buf[4] = 2;
382 dbg("%s - stop bits = 2", __func__);
383 }
384 } else {
385 buf[4] = 0;
386 dbg("%s - stop bits = 1", __func__);
387 }
388
389 if (cflag & PARENB) {
390 /* For reference buf[5]=0 is none parity */
391 /* For reference buf[5]=1 is odd parity */
392 /* For reference buf[5]=2 is even parity */
393 /* For reference buf[5]=3 is mark parity */
394 /* For reference buf[5]=4 is space parity */
395 if (cflag & PARODD) {
396 if (cflag & CMSPAR) {
397 buf[5] = 3;
398 dbg("%s - parity = mark", __func__);
399 } else {
400 buf[5] = 1;
401 dbg("%s - parity = odd", __func__);
402 }
403 } else {
404 if (cflag & CMSPAR) {
405 buf[5] = 4;
406 dbg("%s - parity = space", __func__);
407 } else {
408 buf[5] = 2;
409 dbg("%s - parity = even", __func__);
410 }
411 }
412 } else {
413 buf[5] = 0;
414 dbg("%s - parity = none", __func__);
415 }
416
417 i = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
418 SET_LINE_REQUEST, SET_LINE_REQUEST_TYPE,
419 0, 0, buf, 7, 100);
420 dbg("0x21:0x20:0:0 %d", i);
421
422 /* change control lines if we are switching to or from B0 */
423 spin_lock_irqsave(&priv->lock, flags);
424 control = priv->line_control;
425 if ((cflag & CBAUD) == B0)
426 priv->line_control &= ~(CONTROL_DTR | CONTROL_RTS);
427 else
428 priv->line_control |= (CONTROL_DTR | CONTROL_RTS);
429 if (control != priv->line_control) {
430 control = priv->line_control;
431 spin_unlock_irqrestore(&priv->lock, flags);
432 set_control_lines(serial->dev, control);
433 } else {
434 spin_unlock_irqrestore(&priv->lock, flags);
435 }
436
437 buf[0] = buf[1] = buf[2] = buf[3] = buf[4] = buf[5] = buf[6] = 0;
438
439 i = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
440 GET_LINE_REQUEST, GET_LINE_REQUEST_TYPE,
441 0, 0, buf, 7, 100);
442 dbg("0xa1:0x21:0:0 %d - %x %x %x %x %x %x %x", i,
443 buf[0], buf[1], buf[2], buf[3], buf[4], buf[5], buf[6]);
444
445 if (cflag & CRTSCTS) {
446 if (priv->type == HX)
447 pl2303_vendor_write(0x0, 0x61, serial);
448 else
449 pl2303_vendor_write(0x0, 0x41, serial);
450 } else {
451 pl2303_vendor_write(0x0, 0x0, serial);
452 }
453
454 /* Save resulting baud rate */
455 if (baud)
456 tty_encode_baud_rate(tty, baud, baud);
457
458 kfree(buf);
459}
460
461static void pl2303_dtr_rts(struct usb_serial_port *port, int on)
462{
463 struct pl2303_private *priv = usb_get_serial_port_data(port);
464 unsigned long flags;
465 u8 control;
466
467 spin_lock_irqsave(&priv->lock, flags);
468 /* Change DTR and RTS */
469 if (on)
470 priv->line_control |= (CONTROL_DTR | CONTROL_RTS);
471 else
472 priv->line_control &= ~(CONTROL_DTR | CONTROL_RTS);
473 control = priv->line_control;
474 spin_unlock_irqrestore(&priv->lock, flags);
475 set_control_lines(port->serial->dev, control);
476}
477
478static void pl2303_close(struct usb_serial_port *port)
479{
480 dbg("%s - port %d", __func__, port->number);
481
482 usb_serial_generic_close(port);
483 usb_kill_urb(port->interrupt_in_urb);
484}
485
486static int pl2303_open(struct tty_struct *tty, struct usb_serial_port *port)
487{
488 struct ktermios tmp_termios;
489 struct usb_serial *serial = port->serial;
490 struct pl2303_private *priv = usb_get_serial_port_data(port);
491 int result;
492
493 dbg("%s - port %d", __func__, port->number);
494
495 if (priv->type != HX) {
496 usb_clear_halt(serial->dev, port->write_urb->pipe);
497 usb_clear_halt(serial->dev, port->read_urb->pipe);
498 } else {
499 /* reset upstream data pipes */
500 pl2303_vendor_write(8, 0, serial);
501 pl2303_vendor_write(9, 0, serial);
502 }
503
504 /* Setup termios */
505 if (tty)
506 pl2303_set_termios(tty, port, &tmp_termios);
507
508 dbg("%s - submitting read urb", __func__);
509 result = usb_serial_generic_submit_read_urb(port, GFP_KERNEL);
510 if (result) {
511 pl2303_close(port);
512 return -EPROTO;
513 }
514
515 dbg("%s - submitting interrupt urb", __func__);
516 result = usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL);
517 if (result) {
518 dev_err(&port->dev, "%s - failed submitting interrupt urb,"
519 " error %d\n", __func__, result);
520 pl2303_close(port);
521 return -EPROTO;
522 }
523 port->port.drain_delay = 256;
524 return 0;
525}
526
527static int pl2303_tiocmset(struct tty_struct *tty,
528 unsigned int set, unsigned int clear)
529{
530 struct usb_serial_port *port = tty->driver_data;
531 struct pl2303_private *priv = usb_get_serial_port_data(port);
532 unsigned long flags;
533 u8 control;
534
535 if (!usb_get_intfdata(port->serial->interface))
536 return -ENODEV;
537
538 spin_lock_irqsave(&priv->lock, flags);
539 if (set & TIOCM_RTS)
540 priv->line_control |= CONTROL_RTS;
541 if (set & TIOCM_DTR)
542 priv->line_control |= CONTROL_DTR;
543 if (clear & TIOCM_RTS)
544 priv->line_control &= ~CONTROL_RTS;
545 if (clear & TIOCM_DTR)
546 priv->line_control &= ~CONTROL_DTR;
547 control = priv->line_control;
548 spin_unlock_irqrestore(&priv->lock, flags);
549
550 return set_control_lines(port->serial->dev, control);
551}
552
553static int pl2303_tiocmget(struct tty_struct *tty)
554{
555 struct usb_serial_port *port = tty->driver_data;
556 struct pl2303_private *priv = usb_get_serial_port_data(port);
557 unsigned long flags;
558 unsigned int mcr;
559 unsigned int status;
560 unsigned int result;
561
562 dbg("%s (%d)", __func__, port->number);
563
564 if (!usb_get_intfdata(port->serial->interface))
565 return -ENODEV;
566
567 spin_lock_irqsave(&priv->lock, flags);
568 mcr = priv->line_control;
569 status = priv->line_status;
570 spin_unlock_irqrestore(&priv->lock, flags);
571
572 result = ((mcr & CONTROL_DTR) ? TIOCM_DTR : 0)
573 | ((mcr & CONTROL_RTS) ? TIOCM_RTS : 0)
574 | ((status & UART_CTS) ? TIOCM_CTS : 0)
575 | ((status & UART_DSR) ? TIOCM_DSR : 0)
576 | ((status & UART_RING) ? TIOCM_RI : 0)
577 | ((status & UART_DCD) ? TIOCM_CD : 0);
578
579 dbg("%s - result = %x", __func__, result);
580
581 return result;
582}
583
584static int pl2303_carrier_raised(struct usb_serial_port *port)
585{
586 struct pl2303_private *priv = usb_get_serial_port_data(port);
587 if (priv->line_status & UART_DCD)
588 return 1;
589 return 0;
590}
591
592static int wait_modem_info(struct usb_serial_port *port, unsigned int arg)
593{
594 struct pl2303_private *priv = usb_get_serial_port_data(port);
595 unsigned long flags;
596 unsigned int prevstatus;
597 unsigned int status;
598 unsigned int changed;
599
600 spin_lock_irqsave(&priv->lock, flags);
601 prevstatus = priv->line_status;
602 spin_unlock_irqrestore(&priv->lock, flags);
603
604 while (1) {
605 interruptible_sleep_on(&priv->delta_msr_wait);
606 /* see if a signal did it */
607 if (signal_pending(current))
608 return -ERESTARTSYS;
609
610 spin_lock_irqsave(&priv->lock, flags);
611 status = priv->line_status;
612 spin_unlock_irqrestore(&priv->lock, flags);
613
614 changed = prevstatus ^ status;
615
616 if (((arg & TIOCM_RNG) && (changed & UART_RING)) ||
617 ((arg & TIOCM_DSR) && (changed & UART_DSR)) ||
618 ((arg & TIOCM_CD) && (changed & UART_DCD)) ||
619 ((arg & TIOCM_CTS) && (changed & UART_CTS))) {
620 return 0;
621 }
622 prevstatus = status;
623 }
624 /* NOTREACHED */
625 return 0;
626}
627
628static int pl2303_ioctl(struct tty_struct *tty,
629 unsigned int cmd, unsigned long arg)
630{
631 struct serial_struct ser;
632 struct usb_serial_port *port = tty->driver_data;
633 dbg("%s (%d) cmd = 0x%04x", __func__, port->number, cmd);
634
635 switch (cmd) {
636 case TIOCGSERIAL:
637 memset(&ser, 0, sizeof ser);
638 ser.type = PORT_16654;
639 ser.line = port->serial->minor;
640 ser.port = port->number;
641 ser.baud_base = 460800;
642
643 if (copy_to_user((void __user *)arg, &ser, sizeof ser))
644 return -EFAULT;
645
646 return 0;
647
648 case TIOCMIWAIT:
649 dbg("%s (%d) TIOCMIWAIT", __func__, port->number);
650 return wait_modem_info(port, arg);
651 default:
652 dbg("%s not supported = 0x%04x", __func__, cmd);
653 break;
654 }
655 return -ENOIOCTLCMD;
656}
657
658static void pl2303_break_ctl(struct tty_struct *tty, int break_state)
659{
660 struct usb_serial_port *port = tty->driver_data;
661 struct usb_serial *serial = port->serial;
662 u16 state;
663 int result;
664
665 dbg("%s - port %d", __func__, port->number);
666
667 if (break_state == 0)
668 state = BREAK_OFF;
669 else
670 state = BREAK_ON;
671 dbg("%s - turning break %s", __func__,
672 state == BREAK_OFF ? "off" : "on");
673
674 result = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
675 BREAK_REQUEST, BREAK_REQUEST_TYPE, state,
676 0, NULL, 0, 100);
677 if (result)
678 dbg("%s - error sending break = %d", __func__, result);
679}
680
681static void pl2303_release(struct usb_serial *serial)
682{
683 int i;
684 struct pl2303_private *priv;
685
686 dbg("%s", __func__);
687
688 for (i = 0; i < serial->num_ports; ++i) {
689 priv = usb_get_serial_port_data(serial->port[i]);
690 kfree(priv);
691 }
692}
693
694static void pl2303_update_line_status(struct usb_serial_port *port,
695 unsigned char *data,
696 unsigned int actual_length)
697{
698
699 struct pl2303_private *priv = usb_get_serial_port_data(port);
700 struct tty_struct *tty;
701 unsigned long flags;
702 u8 status_idx = UART_STATE;
703 u8 length = UART_STATE + 1;
704 u8 prev_line_status;
705 u16 idv, idp;
706
707 idv = le16_to_cpu(port->serial->dev->descriptor.idVendor);
708 idp = le16_to_cpu(port->serial->dev->descriptor.idProduct);
709
710
711 if (idv == SIEMENS_VENDOR_ID) {
712 if (idp == SIEMENS_PRODUCT_ID_X65 ||
713 idp == SIEMENS_PRODUCT_ID_SX1 ||
714 idp == SIEMENS_PRODUCT_ID_X75) {
715
716 length = 1;
717 status_idx = 0;
718 }
719 }
720
721 if (actual_length < length)
722 return;
723
724 /* Save off the uart status for others to look at */
725 spin_lock_irqsave(&priv->lock, flags);
726 prev_line_status = priv->line_status;
727 priv->line_status = data[status_idx];
728 spin_unlock_irqrestore(&priv->lock, flags);
729 if (priv->line_status & UART_BREAK_ERROR)
730 usb_serial_handle_break(port);
731 wake_up_interruptible(&priv->delta_msr_wait);
732
733 tty = tty_port_tty_get(&port->port);
734 if (!tty)
735 return;
736 if ((priv->line_status ^ prev_line_status) & UART_DCD)
737 usb_serial_handle_dcd_change(port, tty,
738 priv->line_status & UART_DCD);
739 tty_kref_put(tty);
740}
741
742static void pl2303_read_int_callback(struct urb *urb)
743{
744 struct usb_serial_port *port = urb->context;
745 unsigned char *data = urb->transfer_buffer;
746 unsigned int actual_length = urb->actual_length;
747 int status = urb->status;
748 int retval;
749
750 dbg("%s (%d)", __func__, port->number);
751
752 switch (status) {
753 case 0:
754 /* success */
755 break;
756 case -ECONNRESET:
757 case -ENOENT:
758 case -ESHUTDOWN:
759 /* this urb is terminated, clean up */
760 dbg("%s - urb shutting down with status: %d", __func__,
761 status);
762 return;
763 default:
764 dbg("%s - nonzero urb status received: %d", __func__,
765 status);
766 goto exit;
767 }
768
769 usb_serial_debug_data(debug, &port->dev, __func__,
770 urb->actual_length, urb->transfer_buffer);
771
772 pl2303_update_line_status(port, data, actual_length);
773
774exit:
775 retval = usb_submit_urb(urb, GFP_ATOMIC);
776 if (retval)
777 dev_err(&urb->dev->dev,
778 "%s - usb_submit_urb failed with result %d\n",
779 __func__, retval);
780}
781
782static void pl2303_process_read_urb(struct urb *urb)
783{
784 struct usb_serial_port *port = urb->context;
785 struct pl2303_private *priv = usb_get_serial_port_data(port);
786 struct tty_struct *tty;
787 unsigned char *data = urb->transfer_buffer;
788 char tty_flag = TTY_NORMAL;
789 unsigned long flags;
790 u8 line_status;
791 int i;
792
793 /* update line status */
794 spin_lock_irqsave(&priv->lock, flags);
795 line_status = priv->line_status;
796 priv->line_status &= ~UART_STATE_TRANSIENT_MASK;
797 spin_unlock_irqrestore(&priv->lock, flags);
798 wake_up_interruptible(&priv->delta_msr_wait);
799
800 if (!urb->actual_length)
801 return;
802
803 tty = tty_port_tty_get(&port->port);
804 if (!tty)
805 return;
806
807 /* break takes precedence over parity, */
808 /* which takes precedence over framing errors */
809 if (line_status & UART_BREAK_ERROR)
810 tty_flag = TTY_BREAK;
811 else if (line_status & UART_PARITY_ERROR)
812 tty_flag = TTY_PARITY;
813 else if (line_status & UART_FRAME_ERROR)
814 tty_flag = TTY_FRAME;
815 dbg("%s - tty_flag = %d", __func__, tty_flag);
816
817 /* overrun is special, not associated with a char */
818 if (line_status & UART_OVERRUN_ERROR)
819 tty_insert_flip_char(tty, 0, TTY_OVERRUN);
820
821 if (port->port.console && port->sysrq) {
822 for (i = 0; i < urb->actual_length; ++i)
823 if (!usb_serial_handle_sysrq_char(port, data[i]))
824 tty_insert_flip_char(tty, data[i], tty_flag);
825 } else {
826 tty_insert_flip_string_fixed_flag(tty, data, tty_flag,
827 urb->actual_length);
828 }
829
830 tty_flip_buffer_push(tty);
831 tty_kref_put(tty);
832}
833
834/* All of the device info needed for the PL2303 SIO serial converter */
835static struct usb_serial_driver pl2303_device = {
836 .driver = {
837 .owner = THIS_MODULE,
838 .name = "pl2303",
839 },
840 .id_table = id_table,
841 .usb_driver = &pl2303_driver,
842 .num_ports = 1,
843 .bulk_in_size = 256,
844 .bulk_out_size = 256,
845 .open = pl2303_open,
846 .close = pl2303_close,
847 .dtr_rts = pl2303_dtr_rts,
848 .carrier_raised = pl2303_carrier_raised,
849 .ioctl = pl2303_ioctl,
850 .break_ctl = pl2303_break_ctl,
851 .set_termios = pl2303_set_termios,
852 .tiocmget = pl2303_tiocmget,
853 .tiocmset = pl2303_tiocmset,
854 .process_read_urb = pl2303_process_read_urb,
855 .read_int_callback = pl2303_read_int_callback,
856 .attach = pl2303_startup,
857 .release = pl2303_release,
858};
859
860static int __init pl2303_init(void)
861{
862 int retval;
863
864 retval = usb_serial_register(&pl2303_device);
865 if (retval)
866 goto failed_usb_serial_register;
867 retval = usb_register(&pl2303_driver);
868 if (retval)
869 goto failed_usb_register;
870 printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_DESC "\n");
871 return 0;
872failed_usb_register:
873 usb_serial_deregister(&pl2303_device);
874failed_usb_serial_register:
875 return retval;
876}
877
878static void __exit pl2303_exit(void)
879{
880 usb_deregister(&pl2303_driver);
881 usb_serial_deregister(&pl2303_device);
882}
883
884module_init(pl2303_init);
885module_exit(pl2303_exit);
886
887MODULE_DESCRIPTION(DRIVER_DESC);
888MODULE_LICENSE("GPL");
889
890module_param(debug, bool, S_IRUGO | S_IWUSR);
891MODULE_PARM_DESC(debug, "Debug enabled or not");
892
1// SPDX-License-Identifier: GPL-2.0
2/*
3 * Prolific PL2303 USB to serial adaptor driver
4 *
5 * Copyright (C) 2001-2007 Greg Kroah-Hartman (greg@kroah.com)
6 * Copyright (C) 2003 IBM Corp.
7 *
8 * Original driver for 2.2.x by anonymous
9 *
10 * See Documentation/usb/usb-serial.txt for more information on using this
11 * driver
12 */
13
14#include <linux/kernel.h>
15#include <linux/errno.h>
16#include <linux/slab.h>
17#include <linux/tty.h>
18#include <linux/tty_driver.h>
19#include <linux/tty_flip.h>
20#include <linux/serial.h>
21#include <linux/module.h>
22#include <linux/moduleparam.h>
23#include <linux/spinlock.h>
24#include <linux/uaccess.h>
25#include <linux/usb.h>
26#include <linux/usb/serial.h>
27#include <asm/unaligned.h>
28#include "pl2303.h"
29
30
31#define PL2303_QUIRK_UART_STATE_IDX0 BIT(0)
32#define PL2303_QUIRK_LEGACY BIT(1)
33#define PL2303_QUIRK_ENDPOINT_HACK BIT(2)
34
35static const struct usb_device_id id_table[] = {
36 { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID),
37 .driver_info = PL2303_QUIRK_ENDPOINT_HACK },
38 { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_RSAQ2) },
39 { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_DCU11) },
40 { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_RSAQ3) },
41 { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_CHILITAG) },
42 { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_PHAROS) },
43 { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_ALDIGA) },
44 { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_MMX) },
45 { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_GPRS) },
46 { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_HCR331) },
47 { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_MOTOROLA) },
48 { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_ZTEK) },
49 { USB_DEVICE(IODATA_VENDOR_ID, IODATA_PRODUCT_ID) },
50 { USB_DEVICE(IODATA_VENDOR_ID, IODATA_PRODUCT_ID_RSAQ5) },
51 { USB_DEVICE(ATEN_VENDOR_ID, ATEN_PRODUCT_ID),
52 .driver_info = PL2303_QUIRK_ENDPOINT_HACK },
53 { USB_DEVICE(ATEN_VENDOR_ID, ATEN_PRODUCT_UC485),
54 .driver_info = PL2303_QUIRK_ENDPOINT_HACK },
55 { USB_DEVICE(ATEN_VENDOR_ID, ATEN_PRODUCT_ID2) },
56 { USB_DEVICE(ATEN_VENDOR_ID2, ATEN_PRODUCT_ID) },
57 { USB_DEVICE(ELCOM_VENDOR_ID, ELCOM_PRODUCT_ID) },
58 { USB_DEVICE(ELCOM_VENDOR_ID, ELCOM_PRODUCT_ID_UCSGT) },
59 { USB_DEVICE(ITEGNO_VENDOR_ID, ITEGNO_PRODUCT_ID) },
60 { USB_DEVICE(ITEGNO_VENDOR_ID, ITEGNO_PRODUCT_ID_2080) },
61 { USB_DEVICE(MA620_VENDOR_ID, MA620_PRODUCT_ID) },
62 { USB_DEVICE(RATOC_VENDOR_ID, RATOC_PRODUCT_ID) },
63 { USB_DEVICE(TRIPP_VENDOR_ID, TRIPP_PRODUCT_ID) },
64 { USB_DEVICE(RADIOSHACK_VENDOR_ID, RADIOSHACK_PRODUCT_ID) },
65 { USB_DEVICE(DCU10_VENDOR_ID, DCU10_PRODUCT_ID) },
66 { USB_DEVICE(SITECOM_VENDOR_ID, SITECOM_PRODUCT_ID) },
67 { USB_DEVICE(ALCATEL_VENDOR_ID, ALCATEL_PRODUCT_ID) },
68 { USB_DEVICE(SIEMENS_VENDOR_ID, SIEMENS_PRODUCT_ID_SX1),
69 .driver_info = PL2303_QUIRK_UART_STATE_IDX0 },
70 { USB_DEVICE(SIEMENS_VENDOR_ID, SIEMENS_PRODUCT_ID_X65),
71 .driver_info = PL2303_QUIRK_UART_STATE_IDX0 },
72 { USB_DEVICE(SIEMENS_VENDOR_ID, SIEMENS_PRODUCT_ID_X75),
73 .driver_info = PL2303_QUIRK_UART_STATE_IDX0 },
74 { USB_DEVICE(SIEMENS_VENDOR_ID, SIEMENS_PRODUCT_ID_EF81),
75 .driver_info = PL2303_QUIRK_ENDPOINT_HACK },
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 .driver_info = PL2303_QUIRK_ENDPOINT_HACK },
87 { USB_DEVICE(WS002IN_VENDOR_ID, WS002IN_PRODUCT_ID) },
88 { USB_DEVICE(COREGA_VENDOR_ID, COREGA_PRODUCT_ID) },
89 { USB_DEVICE(YCCABLE_VENDOR_ID, YCCABLE_PRODUCT_ID) },
90 { USB_DEVICE(SUPERIAL_VENDOR_ID, SUPERIAL_PRODUCT_ID) },
91 { USB_DEVICE(HP_VENDOR_ID, HP_LD220_PRODUCT_ID) },
92 { USB_DEVICE(HP_VENDOR_ID, HP_LD960_PRODUCT_ID) },
93 { USB_DEVICE(HP_VENDOR_ID, HP_LCM220_PRODUCT_ID) },
94 { USB_DEVICE(HP_VENDOR_ID, HP_LCM960_PRODUCT_ID) },
95 { USB_DEVICE(CRESSI_VENDOR_ID, CRESSI_EDY_PRODUCT_ID) },
96 { USB_DEVICE(ZEAGLE_VENDOR_ID, ZEAGLE_N2ITION3_PRODUCT_ID) },
97 { USB_DEVICE(SONY_VENDOR_ID, SONY_QN3USB_PRODUCT_ID) },
98 { USB_DEVICE(SANWA_VENDOR_ID, SANWA_PRODUCT_ID) },
99 { USB_DEVICE(ADLINK_VENDOR_ID, ADLINK_ND6530_PRODUCT_ID) },
100 { USB_DEVICE(SMART_VENDOR_ID, SMART_PRODUCT_ID) },
101 { } /* Terminating entry */
102};
103
104MODULE_DEVICE_TABLE(usb, id_table);
105
106#define SET_LINE_REQUEST_TYPE 0x21
107#define SET_LINE_REQUEST 0x20
108
109#define SET_CONTROL_REQUEST_TYPE 0x21
110#define SET_CONTROL_REQUEST 0x22
111#define CONTROL_DTR 0x01
112#define CONTROL_RTS 0x02
113
114#define BREAK_REQUEST_TYPE 0x21
115#define BREAK_REQUEST 0x23
116#define BREAK_ON 0xffff
117#define BREAK_OFF 0x0000
118
119#define GET_LINE_REQUEST_TYPE 0xa1
120#define GET_LINE_REQUEST 0x21
121
122#define VENDOR_WRITE_REQUEST_TYPE 0x40
123#define VENDOR_WRITE_REQUEST 0x01
124
125#define VENDOR_READ_REQUEST_TYPE 0xc0
126#define VENDOR_READ_REQUEST 0x01
127
128#define UART_STATE_INDEX 8
129#define UART_STATE_MSR_MASK 0x8b
130#define UART_STATE_TRANSIENT_MASK 0x74
131#define UART_DCD 0x01
132#define UART_DSR 0x02
133#define UART_BREAK_ERROR 0x04
134#define UART_RING 0x08
135#define UART_FRAME_ERROR 0x10
136#define UART_PARITY_ERROR 0x20
137#define UART_OVERRUN_ERROR 0x40
138#define UART_CTS 0x80
139
140static void pl2303_set_break(struct usb_serial_port *port, bool enable);
141
142enum pl2303_type {
143 TYPE_01, /* Type 0 and 1 (difference unknown) */
144 TYPE_HX, /* HX version of the pl2303 chip */
145 TYPE_COUNT
146};
147
148struct pl2303_type_data {
149 speed_t max_baud_rate;
150 unsigned long quirks;
151};
152
153struct pl2303_serial_private {
154 const struct pl2303_type_data *type;
155 unsigned long quirks;
156};
157
158struct pl2303_private {
159 spinlock_t lock;
160 u8 line_control;
161 u8 line_status;
162
163 u8 line_settings[7];
164};
165
166static const struct pl2303_type_data pl2303_type_data[TYPE_COUNT] = {
167 [TYPE_01] = {
168 .max_baud_rate = 1228800,
169 .quirks = PL2303_QUIRK_LEGACY,
170 },
171 [TYPE_HX] = {
172 .max_baud_rate = 12000000,
173 },
174};
175
176static int pl2303_vendor_read(struct usb_serial *serial, u16 value,
177 unsigned char buf[1])
178{
179 struct device *dev = &serial->interface->dev;
180 int res;
181
182 res = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
183 VENDOR_READ_REQUEST, VENDOR_READ_REQUEST_TYPE,
184 value, 0, buf, 1, 100);
185 if (res != 1) {
186 dev_err(dev, "%s - failed to read [%04x]: %d\n", __func__,
187 value, res);
188 if (res >= 0)
189 res = -EIO;
190
191 return res;
192 }
193
194 dev_dbg(dev, "%s - [%04x] = %02x\n", __func__, value, buf[0]);
195
196 return 0;
197}
198
199static int pl2303_vendor_write(struct usb_serial *serial, u16 value, u16 index)
200{
201 struct device *dev = &serial->interface->dev;
202 int res;
203
204 dev_dbg(dev, "%s - [%04x] = %02x\n", __func__, value, index);
205
206 res = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
207 VENDOR_WRITE_REQUEST, VENDOR_WRITE_REQUEST_TYPE,
208 value, index, NULL, 0, 100);
209 if (res) {
210 dev_err(dev, "%s - failed to write [%04x]: %d\n", __func__,
211 value, res);
212 return res;
213 }
214
215 return 0;
216}
217
218static int pl2303_probe(struct usb_serial *serial,
219 const struct usb_device_id *id)
220{
221 usb_set_serial_data(serial, (void *)id->driver_info);
222
223 return 0;
224}
225
226/*
227 * Use interrupt endpoint from first interface if available.
228 *
229 * This is needed due to the looney way its endpoints are set up.
230 */
231static int pl2303_endpoint_hack(struct usb_serial *serial,
232 struct usb_serial_endpoints *epds)
233{
234 struct usb_interface *interface = serial->interface;
235 struct usb_device *dev = serial->dev;
236 struct device *ddev = &interface->dev;
237 struct usb_host_interface *iface_desc;
238 struct usb_endpoint_descriptor *endpoint;
239 unsigned int i;
240
241 if (interface == dev->actconfig->interface[0])
242 return 0;
243
244 /* check out the endpoints of the other interface */
245 iface_desc = dev->actconfig->interface[0]->cur_altsetting;
246
247 for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) {
248 endpoint = &iface_desc->endpoint[i].desc;
249
250 if (!usb_endpoint_is_int_in(endpoint))
251 continue;
252
253 dev_dbg(ddev, "found interrupt in on separate interface\n");
254 if (epds->num_interrupt_in < ARRAY_SIZE(epds->interrupt_in))
255 epds->interrupt_in[epds->num_interrupt_in++] = endpoint;
256 }
257
258 return 0;
259}
260
261static int pl2303_calc_num_ports(struct usb_serial *serial,
262 struct usb_serial_endpoints *epds)
263{
264 unsigned long quirks = (unsigned long)usb_get_serial_data(serial);
265 struct device *dev = &serial->interface->dev;
266 int ret;
267
268 if (quirks & PL2303_QUIRK_ENDPOINT_HACK) {
269 ret = pl2303_endpoint_hack(serial, epds);
270 if (ret)
271 return ret;
272 }
273
274 if (epds->num_interrupt_in < 1) {
275 dev_err(dev, "required interrupt-in endpoint missing\n");
276 return -ENODEV;
277 }
278
279 return 1;
280}
281
282static int pl2303_startup(struct usb_serial *serial)
283{
284 struct pl2303_serial_private *spriv;
285 enum pl2303_type type = TYPE_01;
286 unsigned char *buf;
287
288 spriv = kzalloc(sizeof(*spriv), GFP_KERNEL);
289 if (!spriv)
290 return -ENOMEM;
291
292 buf = kmalloc(1, GFP_KERNEL);
293 if (!buf) {
294 kfree(spriv);
295 return -ENOMEM;
296 }
297
298 if (serial->dev->descriptor.bDeviceClass == 0x02)
299 type = TYPE_01; /* type 0 */
300 else if (serial->dev->descriptor.bMaxPacketSize0 == 0x40)
301 type = TYPE_HX;
302 else if (serial->dev->descriptor.bDeviceClass == 0x00)
303 type = TYPE_01; /* type 1 */
304 else if (serial->dev->descriptor.bDeviceClass == 0xFF)
305 type = TYPE_01; /* type 1 */
306 dev_dbg(&serial->interface->dev, "device type: %d\n", type);
307
308 spriv->type = &pl2303_type_data[type];
309 spriv->quirks = (unsigned long)usb_get_serial_data(serial);
310 spriv->quirks |= spriv->type->quirks;
311
312 usb_set_serial_data(serial, spriv);
313
314 pl2303_vendor_read(serial, 0x8484, buf);
315 pl2303_vendor_write(serial, 0x0404, 0);
316 pl2303_vendor_read(serial, 0x8484, buf);
317 pl2303_vendor_read(serial, 0x8383, buf);
318 pl2303_vendor_read(serial, 0x8484, buf);
319 pl2303_vendor_write(serial, 0x0404, 1);
320 pl2303_vendor_read(serial, 0x8484, buf);
321 pl2303_vendor_read(serial, 0x8383, buf);
322 pl2303_vendor_write(serial, 0, 1);
323 pl2303_vendor_write(serial, 1, 0);
324 if (spriv->quirks & PL2303_QUIRK_LEGACY)
325 pl2303_vendor_write(serial, 2, 0x24);
326 else
327 pl2303_vendor_write(serial, 2, 0x44);
328
329 kfree(buf);
330
331 return 0;
332}
333
334static void pl2303_release(struct usb_serial *serial)
335{
336 struct pl2303_serial_private *spriv = usb_get_serial_data(serial);
337
338 kfree(spriv);
339}
340
341static int pl2303_port_probe(struct usb_serial_port *port)
342{
343 struct pl2303_private *priv;
344
345 priv = kzalloc(sizeof(*priv), GFP_KERNEL);
346 if (!priv)
347 return -ENOMEM;
348
349 spin_lock_init(&priv->lock);
350
351 usb_set_serial_port_data(port, priv);
352
353 port->port.drain_delay = 256;
354
355 return 0;
356}
357
358static int pl2303_port_remove(struct usb_serial_port *port)
359{
360 struct pl2303_private *priv = usb_get_serial_port_data(port);
361
362 kfree(priv);
363
364 return 0;
365}
366
367static int pl2303_set_control_lines(struct usb_serial_port *port, u8 value)
368{
369 struct usb_device *dev = port->serial->dev;
370 int retval;
371
372 dev_dbg(&port->dev, "%s - %02x\n", __func__, value);
373
374 retval = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
375 SET_CONTROL_REQUEST, SET_CONTROL_REQUEST_TYPE,
376 value, 0, NULL, 0, 100);
377 if (retval)
378 dev_err(&port->dev, "%s - failed: %d\n", __func__, retval);
379
380 return retval;
381}
382
383/*
384 * Returns the nearest supported baud rate that can be set directly without
385 * using divisors.
386 */
387static speed_t pl2303_get_supported_baud_rate(speed_t baud)
388{
389 static const speed_t baud_sup[] = {
390 75, 150, 300, 600, 1200, 1800, 2400, 3600, 4800, 7200, 9600,
391 14400, 19200, 28800, 38400, 57600, 115200, 230400, 460800,
392 614400, 921600, 1228800, 2457600, 3000000, 6000000
393 };
394
395 unsigned i;
396
397 for (i = 0; i < ARRAY_SIZE(baud_sup); ++i) {
398 if (baud_sup[i] > baud)
399 break;
400 }
401
402 if (i == ARRAY_SIZE(baud_sup))
403 baud = baud_sup[i - 1];
404 else if (i > 0 && (baud_sup[i] - baud) > (baud - baud_sup[i - 1]))
405 baud = baud_sup[i - 1];
406 else
407 baud = baud_sup[i];
408
409 return baud;
410}
411
412/*
413 * NOTE: If unsupported baud rates are set directly, the PL2303 seems to
414 * use 9600 baud.
415 */
416static speed_t pl2303_encode_baud_rate_direct(unsigned char buf[4],
417 speed_t baud)
418{
419 put_unaligned_le32(baud, buf);
420
421 return baud;
422}
423
424static speed_t pl2303_encode_baud_rate_divisor(unsigned char buf[4],
425 speed_t baud)
426{
427 unsigned int baseline, mantissa, exponent;
428
429 /*
430 * Apparently the formula is:
431 * baudrate = 12M * 32 / (mantissa * 4^exponent)
432 * where
433 * mantissa = buf[8:0]
434 * exponent = buf[11:9]
435 */
436 baseline = 12000000 * 32;
437 mantissa = baseline / baud;
438 if (mantissa == 0)
439 mantissa = 1; /* Avoid dividing by zero if baud > 32*12M. */
440 exponent = 0;
441 while (mantissa >= 512) {
442 if (exponent < 7) {
443 mantissa >>= 2; /* divide by 4 */
444 exponent++;
445 } else {
446 /* Exponent is maxed. Trim mantissa and leave. */
447 mantissa = 511;
448 break;
449 }
450 }
451
452 buf[3] = 0x80;
453 buf[2] = 0;
454 buf[1] = exponent << 1 | mantissa >> 8;
455 buf[0] = mantissa & 0xff;
456
457 /* Calculate and return the exact baud rate. */
458 baud = (baseline / mantissa) >> (exponent << 1);
459
460 return baud;
461}
462
463static void pl2303_encode_baud_rate(struct tty_struct *tty,
464 struct usb_serial_port *port,
465 u8 buf[4])
466{
467 struct usb_serial *serial = port->serial;
468 struct pl2303_serial_private *spriv = usb_get_serial_data(serial);
469 speed_t baud_sup;
470 speed_t baud;
471
472 baud = tty_get_baud_rate(tty);
473 dev_dbg(&port->dev, "baud requested = %u\n", baud);
474 if (!baud)
475 return;
476
477 if (spriv->type->max_baud_rate)
478 baud = min_t(speed_t, baud, spriv->type->max_baud_rate);
479 /*
480 * Use direct method for supported baud rates, otherwise use divisors.
481 */
482 baud_sup = pl2303_get_supported_baud_rate(baud);
483
484 if (baud == baud_sup)
485 baud = pl2303_encode_baud_rate_direct(buf, baud);
486 else
487 baud = pl2303_encode_baud_rate_divisor(buf, baud);
488
489 /* Save resulting baud rate */
490 tty_encode_baud_rate(tty, baud, baud);
491 dev_dbg(&port->dev, "baud set = %u\n", baud);
492}
493
494static int pl2303_get_line_request(struct usb_serial_port *port,
495 unsigned char buf[7])
496{
497 struct usb_device *udev = port->serial->dev;
498 int ret;
499
500 ret = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
501 GET_LINE_REQUEST, GET_LINE_REQUEST_TYPE,
502 0, 0, buf, 7, 100);
503 if (ret != 7) {
504 dev_err(&port->dev, "%s - failed: %d\n", __func__, ret);
505
506 if (ret >= 0)
507 ret = -EIO;
508
509 return ret;
510 }
511
512 dev_dbg(&port->dev, "%s - %7ph\n", __func__, buf);
513
514 return 0;
515}
516
517static int pl2303_set_line_request(struct usb_serial_port *port,
518 unsigned char buf[7])
519{
520 struct usb_device *udev = port->serial->dev;
521 int ret;
522
523 ret = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
524 SET_LINE_REQUEST, SET_LINE_REQUEST_TYPE,
525 0, 0, buf, 7, 100);
526 if (ret < 0) {
527 dev_err(&port->dev, "%s - failed: %d\n", __func__, ret);
528 return ret;
529 }
530
531 dev_dbg(&port->dev, "%s - %7ph\n", __func__, buf);
532
533 return 0;
534}
535
536static void pl2303_set_termios(struct tty_struct *tty,
537 struct usb_serial_port *port, struct ktermios *old_termios)
538{
539 struct usb_serial *serial = port->serial;
540 struct pl2303_serial_private *spriv = usb_get_serial_data(serial);
541 struct pl2303_private *priv = usb_get_serial_port_data(port);
542 unsigned long flags;
543 unsigned char *buf;
544 int ret;
545 u8 control;
546
547 if (old_termios && !tty_termios_hw_change(&tty->termios, old_termios))
548 return;
549
550 buf = kzalloc(7, GFP_KERNEL);
551 if (!buf) {
552 /* Report back no change occurred */
553 if (old_termios)
554 tty->termios = *old_termios;
555 return;
556 }
557
558 pl2303_get_line_request(port, buf);
559
560 switch (C_CSIZE(tty)) {
561 case CS5:
562 buf[6] = 5;
563 break;
564 case CS6:
565 buf[6] = 6;
566 break;
567 case CS7:
568 buf[6] = 7;
569 break;
570 default:
571 case CS8:
572 buf[6] = 8;
573 }
574 dev_dbg(&port->dev, "data bits = %d\n", buf[6]);
575
576 /* For reference buf[0]:buf[3] baud rate value */
577 pl2303_encode_baud_rate(tty, port, &buf[0]);
578
579 /* For reference buf[4]=0 is 1 stop bits */
580 /* For reference buf[4]=1 is 1.5 stop bits */
581 /* For reference buf[4]=2 is 2 stop bits */
582 if (C_CSTOPB(tty)) {
583 /*
584 * NOTE: Comply with "real" UARTs / RS232:
585 * use 1.5 instead of 2 stop bits with 5 data bits
586 */
587 if (C_CSIZE(tty) == CS5) {
588 buf[4] = 1;
589 dev_dbg(&port->dev, "stop bits = 1.5\n");
590 } else {
591 buf[4] = 2;
592 dev_dbg(&port->dev, "stop bits = 2\n");
593 }
594 } else {
595 buf[4] = 0;
596 dev_dbg(&port->dev, "stop bits = 1\n");
597 }
598
599 if (C_PARENB(tty)) {
600 /* For reference buf[5]=0 is none parity */
601 /* For reference buf[5]=1 is odd parity */
602 /* For reference buf[5]=2 is even parity */
603 /* For reference buf[5]=3 is mark parity */
604 /* For reference buf[5]=4 is space parity */
605 if (C_PARODD(tty)) {
606 if (C_CMSPAR(tty)) {
607 buf[5] = 3;
608 dev_dbg(&port->dev, "parity = mark\n");
609 } else {
610 buf[5] = 1;
611 dev_dbg(&port->dev, "parity = odd\n");
612 }
613 } else {
614 if (C_CMSPAR(tty)) {
615 buf[5] = 4;
616 dev_dbg(&port->dev, "parity = space\n");
617 } else {
618 buf[5] = 2;
619 dev_dbg(&port->dev, "parity = even\n");
620 }
621 }
622 } else {
623 buf[5] = 0;
624 dev_dbg(&port->dev, "parity = none\n");
625 }
626
627 /*
628 * Some PL2303 are known to lose bytes if you change serial settings
629 * even to the same values as before. Thus we actually need to filter
630 * in this specific case.
631 *
632 * Note that the tty_termios_hw_change check above is not sufficient
633 * as a previously requested baud rate may differ from the one
634 * actually used (and stored in old_termios).
635 *
636 * NOTE: No additional locking needed for line_settings as it is
637 * only used in set_termios, which is serialised against itself.
638 */
639 if (!old_termios || memcmp(buf, priv->line_settings, 7)) {
640 ret = pl2303_set_line_request(port, buf);
641 if (!ret)
642 memcpy(priv->line_settings, buf, 7);
643 }
644
645 /* change control lines if we are switching to or from B0 */
646 spin_lock_irqsave(&priv->lock, flags);
647 control = priv->line_control;
648 if (C_BAUD(tty) == B0)
649 priv->line_control &= ~(CONTROL_DTR | CONTROL_RTS);
650 else if (old_termios && (old_termios->c_cflag & CBAUD) == B0)
651 priv->line_control |= (CONTROL_DTR | CONTROL_RTS);
652 if (control != priv->line_control) {
653 control = priv->line_control;
654 spin_unlock_irqrestore(&priv->lock, flags);
655 pl2303_set_control_lines(port, control);
656 } else {
657 spin_unlock_irqrestore(&priv->lock, flags);
658 }
659
660 if (C_CRTSCTS(tty)) {
661 if (spriv->quirks & PL2303_QUIRK_LEGACY)
662 pl2303_vendor_write(serial, 0x0, 0x41);
663 else
664 pl2303_vendor_write(serial, 0x0, 0x61);
665 } else {
666 pl2303_vendor_write(serial, 0x0, 0x0);
667 }
668
669 kfree(buf);
670}
671
672static void pl2303_dtr_rts(struct usb_serial_port *port, int on)
673{
674 struct pl2303_private *priv = usb_get_serial_port_data(port);
675 unsigned long flags;
676 u8 control;
677
678 spin_lock_irqsave(&priv->lock, flags);
679 if (on)
680 priv->line_control |= (CONTROL_DTR | CONTROL_RTS);
681 else
682 priv->line_control &= ~(CONTROL_DTR | CONTROL_RTS);
683 control = priv->line_control;
684 spin_unlock_irqrestore(&priv->lock, flags);
685
686 pl2303_set_control_lines(port, control);
687}
688
689static void pl2303_close(struct usb_serial_port *port)
690{
691 usb_serial_generic_close(port);
692 usb_kill_urb(port->interrupt_in_urb);
693 pl2303_set_break(port, false);
694}
695
696static int pl2303_open(struct tty_struct *tty, struct usb_serial_port *port)
697{
698 struct usb_serial *serial = port->serial;
699 struct pl2303_serial_private *spriv = usb_get_serial_data(serial);
700 int result;
701
702 if (spriv->quirks & PL2303_QUIRK_LEGACY) {
703 usb_clear_halt(serial->dev, port->write_urb->pipe);
704 usb_clear_halt(serial->dev, port->read_urb->pipe);
705 } else {
706 /* reset upstream data pipes */
707 pl2303_vendor_write(serial, 8, 0);
708 pl2303_vendor_write(serial, 9, 0);
709 }
710
711 /* Setup termios */
712 if (tty)
713 pl2303_set_termios(tty, port, NULL);
714
715 result = usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL);
716 if (result) {
717 dev_err(&port->dev, "failed to submit interrupt urb: %d\n",
718 result);
719 return result;
720 }
721
722 result = usb_serial_generic_open(tty, port);
723 if (result) {
724 usb_kill_urb(port->interrupt_in_urb);
725 return result;
726 }
727
728 return 0;
729}
730
731static int pl2303_tiocmset(struct tty_struct *tty,
732 unsigned int set, unsigned int clear)
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 u8 control;
738 int ret;
739
740 spin_lock_irqsave(&priv->lock, flags);
741 if (set & TIOCM_RTS)
742 priv->line_control |= CONTROL_RTS;
743 if (set & TIOCM_DTR)
744 priv->line_control |= CONTROL_DTR;
745 if (clear & TIOCM_RTS)
746 priv->line_control &= ~CONTROL_RTS;
747 if (clear & TIOCM_DTR)
748 priv->line_control &= ~CONTROL_DTR;
749 control = priv->line_control;
750 spin_unlock_irqrestore(&priv->lock, flags);
751
752 ret = pl2303_set_control_lines(port, control);
753 if (ret)
754 return usb_translate_errors(ret);
755
756 return 0;
757}
758
759static int pl2303_tiocmget(struct tty_struct *tty)
760{
761 struct usb_serial_port *port = tty->driver_data;
762 struct pl2303_private *priv = usb_get_serial_port_data(port);
763 unsigned long flags;
764 unsigned int mcr;
765 unsigned int status;
766 unsigned int result;
767
768 spin_lock_irqsave(&priv->lock, flags);
769 mcr = priv->line_control;
770 status = priv->line_status;
771 spin_unlock_irqrestore(&priv->lock, flags);
772
773 result = ((mcr & CONTROL_DTR) ? TIOCM_DTR : 0)
774 | ((mcr & CONTROL_RTS) ? TIOCM_RTS : 0)
775 | ((status & UART_CTS) ? TIOCM_CTS : 0)
776 | ((status & UART_DSR) ? TIOCM_DSR : 0)
777 | ((status & UART_RING) ? TIOCM_RI : 0)
778 | ((status & UART_DCD) ? TIOCM_CD : 0);
779
780 dev_dbg(&port->dev, "%s - result = %x\n", __func__, result);
781
782 return result;
783}
784
785static int pl2303_carrier_raised(struct usb_serial_port *port)
786{
787 struct pl2303_private *priv = usb_get_serial_port_data(port);
788
789 if (priv->line_status & UART_DCD)
790 return 1;
791
792 return 0;
793}
794
795static int pl2303_ioctl(struct tty_struct *tty,
796 unsigned int cmd, unsigned long arg)
797{
798 struct serial_struct ser;
799 struct usb_serial_port *port = tty->driver_data;
800
801 switch (cmd) {
802 case TIOCGSERIAL:
803 memset(&ser, 0, sizeof ser);
804 ser.type = PORT_16654;
805 ser.line = port->minor;
806 ser.port = port->port_number;
807 ser.baud_base = 460800;
808
809 if (copy_to_user((void __user *)arg, &ser, sizeof ser))
810 return -EFAULT;
811
812 return 0;
813 default:
814 break;
815 }
816
817 return -ENOIOCTLCMD;
818}
819
820static void pl2303_set_break(struct usb_serial_port *port, bool enable)
821{
822 struct usb_serial *serial = port->serial;
823 u16 state;
824 int result;
825
826 if (enable)
827 state = BREAK_ON;
828 else
829 state = BREAK_OFF;
830
831 dev_dbg(&port->dev, "%s - turning break %s\n", __func__,
832 state == BREAK_OFF ? "off" : "on");
833
834 result = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
835 BREAK_REQUEST, BREAK_REQUEST_TYPE, state,
836 0, NULL, 0, 100);
837 if (result)
838 dev_err(&port->dev, "error sending break = %d\n", result);
839}
840
841static void pl2303_break_ctl(struct tty_struct *tty, int state)
842{
843 struct usb_serial_port *port = tty->driver_data;
844
845 pl2303_set_break(port, state);
846}
847
848static void pl2303_update_line_status(struct usb_serial_port *port,
849 unsigned char *data,
850 unsigned int actual_length)
851{
852 struct usb_serial *serial = port->serial;
853 struct pl2303_serial_private *spriv = usb_get_serial_data(serial);
854 struct pl2303_private *priv = usb_get_serial_port_data(port);
855 struct tty_struct *tty;
856 unsigned long flags;
857 unsigned int status_idx = UART_STATE_INDEX;
858 u8 status;
859 u8 delta;
860
861 if (spriv->quirks & PL2303_QUIRK_UART_STATE_IDX0)
862 status_idx = 0;
863
864 if (actual_length < status_idx + 1)
865 return;
866
867 status = data[status_idx];
868
869 /* Save off the uart status for others to look at */
870 spin_lock_irqsave(&priv->lock, flags);
871 delta = priv->line_status ^ status;
872 priv->line_status = status;
873 spin_unlock_irqrestore(&priv->lock, flags);
874
875 if (status & UART_BREAK_ERROR)
876 usb_serial_handle_break(port);
877
878 if (delta & UART_STATE_MSR_MASK) {
879 if (delta & UART_CTS)
880 port->icount.cts++;
881 if (delta & UART_DSR)
882 port->icount.dsr++;
883 if (delta & UART_RING)
884 port->icount.rng++;
885 if (delta & UART_DCD) {
886 port->icount.dcd++;
887 tty = tty_port_tty_get(&port->port);
888 if (tty) {
889 usb_serial_handle_dcd_change(port, tty,
890 status & UART_DCD);
891 tty_kref_put(tty);
892 }
893 }
894
895 wake_up_interruptible(&port->port.delta_msr_wait);
896 }
897}
898
899static void pl2303_read_int_callback(struct urb *urb)
900{
901 struct usb_serial_port *port = urb->context;
902 unsigned char *data = urb->transfer_buffer;
903 unsigned int actual_length = urb->actual_length;
904 int status = urb->status;
905 int retval;
906
907 switch (status) {
908 case 0:
909 /* success */
910 break;
911 case -ECONNRESET:
912 case -ENOENT:
913 case -ESHUTDOWN:
914 /* this urb is terminated, clean up */
915 dev_dbg(&port->dev, "%s - urb shutting down with status: %d\n",
916 __func__, status);
917 return;
918 default:
919 dev_dbg(&port->dev, "%s - nonzero urb status received: %d\n",
920 __func__, status);
921 goto exit;
922 }
923
924 usb_serial_debug_data(&port->dev, __func__,
925 urb->actual_length, urb->transfer_buffer);
926
927 pl2303_update_line_status(port, data, actual_length);
928
929exit:
930 retval = usb_submit_urb(urb, GFP_ATOMIC);
931 if (retval) {
932 dev_err(&port->dev,
933 "%s - usb_submit_urb failed with result %d\n",
934 __func__, retval);
935 }
936}
937
938static void pl2303_process_read_urb(struct urb *urb)
939{
940 struct usb_serial_port *port = urb->context;
941 struct pl2303_private *priv = usb_get_serial_port_data(port);
942 unsigned char *data = urb->transfer_buffer;
943 char tty_flag = TTY_NORMAL;
944 unsigned long flags;
945 u8 line_status;
946 int i;
947
948 /* update line status */
949 spin_lock_irqsave(&priv->lock, flags);
950 line_status = priv->line_status;
951 priv->line_status &= ~UART_STATE_TRANSIENT_MASK;
952 spin_unlock_irqrestore(&priv->lock, flags);
953
954 if (!urb->actual_length)
955 return;
956
957 /*
958 * Break takes precedence over parity, which takes precedence over
959 * framing errors.
960 */
961 if (line_status & UART_BREAK_ERROR)
962 tty_flag = TTY_BREAK;
963 else if (line_status & UART_PARITY_ERROR)
964 tty_flag = TTY_PARITY;
965 else if (line_status & UART_FRAME_ERROR)
966 tty_flag = TTY_FRAME;
967
968 if (tty_flag != TTY_NORMAL)
969 dev_dbg(&port->dev, "%s - tty_flag = %d\n", __func__,
970 tty_flag);
971 /* overrun is special, not associated with a char */
972 if (line_status & UART_OVERRUN_ERROR)
973 tty_insert_flip_char(&port->port, 0, TTY_OVERRUN);
974
975 if (port->port.console && port->sysrq) {
976 for (i = 0; i < urb->actual_length; ++i)
977 if (!usb_serial_handle_sysrq_char(port, data[i]))
978 tty_insert_flip_char(&port->port, data[i],
979 tty_flag);
980 } else {
981 tty_insert_flip_string_fixed_flag(&port->port, data, tty_flag,
982 urb->actual_length);
983 }
984
985 tty_flip_buffer_push(&port->port);
986}
987
988static struct usb_serial_driver pl2303_device = {
989 .driver = {
990 .owner = THIS_MODULE,
991 .name = "pl2303",
992 },
993 .id_table = id_table,
994 .num_bulk_in = 1,
995 .num_bulk_out = 1,
996 .num_interrupt_in = 0, /* see pl2303_calc_num_ports */
997 .bulk_in_size = 256,
998 .bulk_out_size = 256,
999 .open = pl2303_open,
1000 .close = pl2303_close,
1001 .dtr_rts = pl2303_dtr_rts,
1002 .carrier_raised = pl2303_carrier_raised,
1003 .ioctl = pl2303_ioctl,
1004 .break_ctl = pl2303_break_ctl,
1005 .set_termios = pl2303_set_termios,
1006 .tiocmget = pl2303_tiocmget,
1007 .tiocmset = pl2303_tiocmset,
1008 .tiocmiwait = usb_serial_generic_tiocmiwait,
1009 .process_read_urb = pl2303_process_read_urb,
1010 .read_int_callback = pl2303_read_int_callback,
1011 .probe = pl2303_probe,
1012 .calc_num_ports = pl2303_calc_num_ports,
1013 .attach = pl2303_startup,
1014 .release = pl2303_release,
1015 .port_probe = pl2303_port_probe,
1016 .port_remove = pl2303_port_remove,
1017};
1018
1019static struct usb_serial_driver * const serial_drivers[] = {
1020 &pl2303_device, NULL
1021};
1022
1023module_usb_serial_driver(serial_drivers, id_table);
1024
1025MODULE_DESCRIPTION("Prolific PL2303 USB to serial adaptor driver");
1026MODULE_LICENSE("GPL v2");