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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
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) },
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(SMART_VENDOR_ID, SMART_PRODUCT_ID) },
95 { }
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,
147 type_1,
148 HX,
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
272
273
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
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
314
315
316
317
318 baud = tty_get_baud_rate(tty);
319 dbg("%s - baud requested = %d", __func__, baud);
320 if (baud) {
321
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
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
353
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 buf[0] = tmp;
364 }
365 }
366
367
368
369
370 if (cflag & CSTOPB) {
371
372
373
374 if ((cflag & CSIZE) == CS5) {
375 buf[4] = 1;
376 dbg("%s - stop bits = 1.5", __func__);
377 } else {
378 buf[4] = 2;
379 dbg("%s - stop bits = 2", __func__);
380 }
381 } else {
382 buf[4] = 0;
383 dbg("%s - stop bits = 1", __func__);
384 }
385
386 if (cflag & PARENB) {
387
388
389
390
391
392 if (cflag & PARODD) {
393 if (cflag & CMSPAR) {
394 buf[5] = 3;
395 dbg("%s - parity = mark", __func__);
396 } else {
397 buf[5] = 1;
398 dbg("%s - parity = odd", __func__);
399 }
400 } else {
401 if (cflag & CMSPAR) {
402 buf[5] = 4;
403 dbg("%s - parity = space", __func__);
404 } else {
405 buf[5] = 2;
406 dbg("%s - parity = even", __func__);
407 }
408 }
409 } else {
410 buf[5] = 0;
411 dbg("%s - parity = none", __func__);
412 }
413
414 i = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
415 SET_LINE_REQUEST, SET_LINE_REQUEST_TYPE,
416 0, 0, buf, 7, 100);
417 dbg("0x21:0x20:0:0 %d", i);
418
419
420 spin_lock_irqsave(&priv->lock, flags);
421 control = priv->line_control;
422 if ((cflag & CBAUD) == B0)
423 priv->line_control &= ~(CONTROL_DTR | CONTROL_RTS);
424 else
425 priv->line_control |= (CONTROL_DTR | CONTROL_RTS);
426 if (control != priv->line_control) {
427 control = priv->line_control;
428 spin_unlock_irqrestore(&priv->lock, flags);
429 set_control_lines(serial->dev, control);
430 } else {
431 spin_unlock_irqrestore(&priv->lock, flags);
432 }
433
434 buf[0] = buf[1] = buf[2] = buf[3] = buf[4] = buf[5] = buf[6] = 0;
435
436 i = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
437 GET_LINE_REQUEST, GET_LINE_REQUEST_TYPE,
438 0, 0, buf, 7, 100);
439 dbg("0xa1:0x21:0:0 %d - %x %x %x %x %x %x %x", i,
440 buf[0], buf[1], buf[2], buf[3], buf[4], buf[5], buf[6]);
441
442 if (cflag & CRTSCTS) {
443 if (priv->type == HX)
444 pl2303_vendor_write(0x0, 0x61, serial);
445 else
446 pl2303_vendor_write(0x0, 0x41, serial);
447 } else {
448 pl2303_vendor_write(0x0, 0x0, serial);
449 }
450
451
452 if (baud)
453 tty_encode_baud_rate(tty, baud, baud);
454
455 kfree(buf);
456}
457
458static void pl2303_dtr_rts(struct usb_serial_port *port, int on)
459{
460 struct pl2303_private *priv = usb_get_serial_port_data(port);
461 unsigned long flags;
462 u8 control;
463
464 spin_lock_irqsave(&priv->lock, flags);
465
466 if (on)
467 priv->line_control |= (CONTROL_DTR | CONTROL_RTS);
468 else
469 priv->line_control &= ~(CONTROL_DTR | CONTROL_RTS);
470 control = priv->line_control;
471 spin_unlock_irqrestore(&priv->lock, flags);
472 set_control_lines(port->serial->dev, control);
473}
474
475static void pl2303_close(struct usb_serial_port *port)
476{
477 dbg("%s - port %d", __func__, port->number);
478
479 usb_serial_generic_close(port);
480 usb_kill_urb(port->interrupt_in_urb);
481}
482
483static int pl2303_open(struct tty_struct *tty, struct usb_serial_port *port)
484{
485 struct ktermios tmp_termios;
486 struct usb_serial *serial = port->serial;
487 struct pl2303_private *priv = usb_get_serial_port_data(port);
488 int result;
489
490 dbg("%s - port %d", __func__, port->number);
491
492 if (priv->type != HX) {
493 usb_clear_halt(serial->dev, port->write_urb->pipe);
494 usb_clear_halt(serial->dev, port->read_urb->pipe);
495 } else {
496
497 pl2303_vendor_write(8, 0, serial);
498 pl2303_vendor_write(9, 0, serial);
499 }
500
501
502 if (tty)
503 pl2303_set_termios(tty, port, &tmp_termios);
504
505 dbg("%s - submitting read urb", __func__);
506 result = usb_serial_generic_submit_read_urb(port, GFP_KERNEL);
507 if (result) {
508 pl2303_close(port);
509 return -EPROTO;
510 }
511
512 dbg("%s - submitting interrupt urb", __func__);
513 result = usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL);
514 if (result) {
515 dev_err(&port->dev, "%s - failed submitting interrupt urb,"
516 " error %d\n", __func__, result);
517 pl2303_close(port);
518 return -EPROTO;
519 }
520 port->port.drain_delay = 256;
521 return 0;
522}
523
524static int pl2303_tiocmset(struct tty_struct *tty,
525 unsigned int set, unsigned int clear)
526{
527 struct usb_serial_port *port = tty->driver_data;
528 struct pl2303_private *priv = usb_get_serial_port_data(port);
529 unsigned long flags;
530 u8 control;
531
532 if (!usb_get_intfdata(port->serial->interface))
533 return -ENODEV;
534
535 spin_lock_irqsave(&priv->lock, flags);
536 if (set & TIOCM_RTS)
537 priv->line_control |= CONTROL_RTS;
538 if (set & TIOCM_DTR)
539 priv->line_control |= CONTROL_DTR;
540 if (clear & TIOCM_RTS)
541 priv->line_control &= ~CONTROL_RTS;
542 if (clear & TIOCM_DTR)
543 priv->line_control &= ~CONTROL_DTR;
544 control = priv->line_control;
545 spin_unlock_irqrestore(&priv->lock, flags);
546
547 return set_control_lines(port->serial->dev, control);
548}
549
550static int pl2303_tiocmget(struct tty_struct *tty)
551{
552 struct usb_serial_port *port = tty->driver_data;
553 struct pl2303_private *priv = usb_get_serial_port_data(port);
554 unsigned long flags;
555 unsigned int mcr;
556 unsigned int status;
557 unsigned int result;
558
559 dbg("%s (%d)", __func__, port->number);
560
561 if (!usb_get_intfdata(port->serial->interface))
562 return -ENODEV;
563
564 spin_lock_irqsave(&priv->lock, flags);
565 mcr = priv->line_control;
566 status = priv->line_status;
567 spin_unlock_irqrestore(&priv->lock, flags);
568
569 result = ((mcr & CONTROL_DTR) ? TIOCM_DTR : 0)
570 | ((mcr & CONTROL_RTS) ? TIOCM_RTS : 0)
571 | ((status & UART_CTS) ? TIOCM_CTS : 0)
572 | ((status & UART_DSR) ? TIOCM_DSR : 0)
573 | ((status & UART_RING) ? TIOCM_RI : 0)
574 | ((status & UART_DCD) ? TIOCM_CD : 0);
575
576 dbg("%s - result = %x", __func__, result);
577
578 return result;
579}
580
581static int pl2303_carrier_raised(struct usb_serial_port *port)
582{
583 struct pl2303_private *priv = usb_get_serial_port_data(port);
584 if (priv->line_status & UART_DCD)
585 return 1;
586 return 0;
587}
588
589static int wait_modem_info(struct usb_serial_port *port, unsigned int arg)
590{
591 struct pl2303_private *priv = usb_get_serial_port_data(port);
592 unsigned long flags;
593 unsigned int prevstatus;
594 unsigned int status;
595 unsigned int changed;
596
597 spin_lock_irqsave(&priv->lock, flags);
598 prevstatus = priv->line_status;
599 spin_unlock_irqrestore(&priv->lock, flags);
600
601 while (1) {
602 interruptible_sleep_on(&priv->delta_msr_wait);
603
604 if (signal_pending(current))
605 return -ERESTARTSYS;
606
607 spin_lock_irqsave(&priv->lock, flags);
608 status = priv->line_status;
609 spin_unlock_irqrestore(&priv->lock, flags);
610
611 changed = prevstatus ^ status;
612
613 if (((arg & TIOCM_RNG) && (changed & UART_RING)) ||
614 ((arg & TIOCM_DSR) && (changed & UART_DSR)) ||
615 ((arg & TIOCM_CD) && (changed & UART_DCD)) ||
616 ((arg & TIOCM_CTS) && (changed & UART_CTS))) {
617 return 0;
618 }
619 prevstatus = status;
620 }
621
622 return 0;
623}
624
625static int pl2303_ioctl(struct tty_struct *tty,
626 unsigned int cmd, unsigned long arg)
627{
628 struct serial_struct ser;
629 struct usb_serial_port *port = tty->driver_data;
630 dbg("%s (%d) cmd = 0x%04x", __func__, port->number, cmd);
631
632 switch (cmd) {
633 case TIOCGSERIAL:
634 memset(&ser, 0, sizeof ser);
635 ser.type = PORT_16654;
636 ser.line = port->serial->minor;
637 ser.port = port->number;
638 ser.baud_base = 460800;
639
640 if (copy_to_user((void __user *)arg, &ser, sizeof ser))
641 return -EFAULT;
642
643 return 0;
644
645 case TIOCMIWAIT:
646 dbg("%s (%d) TIOCMIWAIT", __func__, port->number);
647 return wait_modem_info(port, arg);
648 default:
649 dbg("%s not supported = 0x%04x", __func__, cmd);
650 break;
651 }
652 return -ENOIOCTLCMD;
653}
654
655static void pl2303_break_ctl(struct tty_struct *tty, int break_state)
656{
657 struct usb_serial_port *port = tty->driver_data;
658 struct usb_serial *serial = port->serial;
659 u16 state;
660 int result;
661
662 dbg("%s - port %d", __func__, port->number);
663
664 if (break_state == 0)
665 state = BREAK_OFF;
666 else
667 state = BREAK_ON;
668 dbg("%s - turning break %s", __func__,
669 state == BREAK_OFF ? "off" : "on");
670
671 result = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
672 BREAK_REQUEST, BREAK_REQUEST_TYPE, state,
673 0, NULL, 0, 100);
674 if (result)
675 dbg("%s - error sending break = %d", __func__, result);
676}
677
678static void pl2303_release(struct usb_serial *serial)
679{
680 int i;
681 struct pl2303_private *priv;
682
683 dbg("%s", __func__);
684
685 for (i = 0; i < serial->num_ports; ++i) {
686 priv = usb_get_serial_port_data(serial->port[i]);
687 kfree(priv);
688 }
689}
690
691static void pl2303_update_line_status(struct usb_serial_port *port,
692 unsigned char *data,
693 unsigned int actual_length)
694{
695
696 struct pl2303_private *priv = usb_get_serial_port_data(port);
697 struct tty_struct *tty;
698 unsigned long flags;
699 u8 status_idx = UART_STATE;
700 u8 length = UART_STATE + 1;
701 u8 prev_line_status;
702 u16 idv, idp;
703
704 idv = le16_to_cpu(port->serial->dev->descriptor.idVendor);
705 idp = le16_to_cpu(port->serial->dev->descriptor.idProduct);
706
707
708 if (idv == SIEMENS_VENDOR_ID) {
709 if (idp == SIEMENS_PRODUCT_ID_X65 ||
710 idp == SIEMENS_PRODUCT_ID_SX1 ||
711 idp == SIEMENS_PRODUCT_ID_X75) {
712
713 length = 1;
714 status_idx = 0;
715 }
716 }
717
718 if (actual_length < length)
719 return;
720
721
722 spin_lock_irqsave(&priv->lock, flags);
723 prev_line_status = priv->line_status;
724 priv->line_status = data[status_idx];
725 spin_unlock_irqrestore(&priv->lock, flags);
726 if (priv->line_status & UART_BREAK_ERROR)
727 usb_serial_handle_break(port);
728 wake_up_interruptible(&priv->delta_msr_wait);
729
730 tty = tty_port_tty_get(&port->port);
731 if (!tty)
732 return;
733 if ((priv->line_status ^ prev_line_status) & UART_DCD)
734 usb_serial_handle_dcd_change(port, tty,
735 priv->line_status & UART_DCD);
736 tty_kref_put(tty);
737}
738
739static void pl2303_read_int_callback(struct urb *urb)
740{
741 struct usb_serial_port *port = urb->context;
742 unsigned char *data = urb->transfer_buffer;
743 unsigned int actual_length = urb->actual_length;
744 int status = urb->status;
745 int retval;
746
747 dbg("%s (%d)", __func__, port->number);
748
749 switch (status) {
750 case 0:
751
752 break;
753 case -ECONNRESET:
754 case -ENOENT:
755 case -ESHUTDOWN:
756
757 dbg("%s - urb shutting down with status: %d", __func__,
758 status);
759 return;
760 default:
761 dbg("%s - nonzero urb status received: %d", __func__,
762 status);
763 goto exit;
764 }
765
766 usb_serial_debug_data(debug, &port->dev, __func__,
767 urb->actual_length, urb->transfer_buffer);
768
769 pl2303_update_line_status(port, data, actual_length);
770
771exit:
772 retval = usb_submit_urb(urb, GFP_ATOMIC);
773 if (retval)
774 dev_err(&urb->dev->dev,
775 "%s - usb_submit_urb failed with result %d\n",
776 __func__, retval);
777}
778
779static void pl2303_process_read_urb(struct urb *urb)
780{
781 struct usb_serial_port *port = urb->context;
782 struct pl2303_private *priv = usb_get_serial_port_data(port);
783 struct tty_struct *tty;
784 unsigned char *data = urb->transfer_buffer;
785 char tty_flag = TTY_NORMAL;
786 unsigned long flags;
787 u8 line_status;
788 int i;
789
790
791 spin_lock_irqsave(&priv->lock, flags);
792 line_status = priv->line_status;
793 priv->line_status &= ~UART_STATE_TRANSIENT_MASK;
794 spin_unlock_irqrestore(&priv->lock, flags);
795 wake_up_interruptible(&priv->delta_msr_wait);
796
797 if (!urb->actual_length)
798 return;
799
800 tty = tty_port_tty_get(&port->port);
801 if (!tty)
802 return;
803
804
805
806 if (line_status & UART_BREAK_ERROR)
807 tty_flag = TTY_BREAK;
808 else if (line_status & UART_PARITY_ERROR)
809 tty_flag = TTY_PARITY;
810 else if (line_status & UART_FRAME_ERROR)
811 tty_flag = TTY_FRAME;
812 dbg("%s - tty_flag = %d", __func__, tty_flag);
813
814
815 if (line_status & UART_OVERRUN_ERROR)
816 tty_insert_flip_char(tty, 0, TTY_OVERRUN);
817
818 if (port->port.console && port->sysrq) {
819 for (i = 0; i < urb->actual_length; ++i)
820 if (!usb_serial_handle_sysrq_char(port, data[i]))
821 tty_insert_flip_char(tty, data[i], tty_flag);
822 } else {
823 tty_insert_flip_string_fixed_flag(tty, data, tty_flag,
824 urb->actual_length);
825 }
826
827 tty_flip_buffer_push(tty);
828 tty_kref_put(tty);
829}
830
831
832static struct usb_serial_driver pl2303_device = {
833 .driver = {
834 .owner = THIS_MODULE,
835 .name = "pl2303",
836 },
837 .id_table = id_table,
838 .usb_driver = &pl2303_driver,
839 .num_ports = 1,
840 .bulk_in_size = 256,
841 .bulk_out_size = 256,
842 .open = pl2303_open,
843 .close = pl2303_close,
844 .dtr_rts = pl2303_dtr_rts,
845 .carrier_raised = pl2303_carrier_raised,
846 .ioctl = pl2303_ioctl,
847 .break_ctl = pl2303_break_ctl,
848 .set_termios = pl2303_set_termios,
849 .tiocmget = pl2303_tiocmget,
850 .tiocmset = pl2303_tiocmset,
851 .process_read_urb = pl2303_process_read_urb,
852 .read_int_callback = pl2303_read_int_callback,
853 .attach = pl2303_startup,
854 .release = pl2303_release,
855};
856
857static int __init pl2303_init(void)
858{
859 int retval;
860
861 retval = usb_serial_register(&pl2303_device);
862 if (retval)
863 goto failed_usb_serial_register;
864 retval = usb_register(&pl2303_driver);
865 if (retval)
866 goto failed_usb_register;
867 printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_DESC "\n");
868 return 0;
869failed_usb_register:
870 usb_serial_deregister(&pl2303_device);
871failed_usb_serial_register:
872 return retval;
873}
874
875static void __exit pl2303_exit(void)
876{
877 usb_deregister(&pl2303_driver);
878 usb_serial_deregister(&pl2303_device);
879}
880
881module_init(pl2303_init);
882module_exit(pl2303_exit);
883
884MODULE_DESCRIPTION(DRIVER_DESC);
885MODULE_LICENSE("GPL");
886
887module_param(debug, bool, S_IRUGO | S_IWUSR);
888MODULE_PARM_DESC(debug, "Debug enabled or not");
889
890
