ASoC: wm5110: Correct HPOUT3 DAPM route typo
[linux-drm-fsl-dcu.git] / drivers / usb / serial / pl2303.c
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 <asm/unaligned.h>
33 #include "pl2303.h"
34
35 /*
36  * Version Information
37  */
38 #define DRIVER_DESC "Prolific PL2303 USB to serial adaptor driver"
39
40 static const struct usb_device_id id_table[] = {
41         { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID) },
42         { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_RSAQ2) },
43         { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_DCU11) },
44         { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_RSAQ3) },
45         { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_PHAROS) },
46         { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_ALDIGA) },
47         { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_MMX) },
48         { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_GPRS) },
49         { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_HCR331) },
50         { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_MOTOROLA) },
51         { USB_DEVICE(IODATA_VENDOR_ID, IODATA_PRODUCT_ID) },
52         { USB_DEVICE(IODATA_VENDOR_ID, IODATA_PRODUCT_ID_RSAQ5) },
53         { USB_DEVICE(ATEN_VENDOR_ID, ATEN_PRODUCT_ID) },
54         { USB_DEVICE(ATEN_VENDOR_ID2, ATEN_PRODUCT_ID) },
55         { USB_DEVICE(ELCOM_VENDOR_ID, ELCOM_PRODUCT_ID) },
56         { USB_DEVICE(ELCOM_VENDOR_ID, ELCOM_PRODUCT_ID_UCSGT) },
57         { USB_DEVICE(ITEGNO_VENDOR_ID, ITEGNO_PRODUCT_ID) },
58         { USB_DEVICE(ITEGNO_VENDOR_ID, ITEGNO_PRODUCT_ID_2080) },
59         { USB_DEVICE(MA620_VENDOR_ID, MA620_PRODUCT_ID) },
60         { USB_DEVICE(RATOC_VENDOR_ID, RATOC_PRODUCT_ID) },
61         { USB_DEVICE(TRIPP_VENDOR_ID, TRIPP_PRODUCT_ID) },
62         { USB_DEVICE(RADIOSHACK_VENDOR_ID, RADIOSHACK_PRODUCT_ID) },
63         { USB_DEVICE(DCU10_VENDOR_ID, DCU10_PRODUCT_ID) },
64         { USB_DEVICE(SITECOM_VENDOR_ID, SITECOM_PRODUCT_ID) },
65         { USB_DEVICE(ALCATEL_VENDOR_ID, ALCATEL_PRODUCT_ID) },
66         { USB_DEVICE(SAMSUNG_VENDOR_ID, SAMSUNG_PRODUCT_ID) },
67         { USB_DEVICE(SIEMENS_VENDOR_ID, SIEMENS_PRODUCT_ID_SX1) },
68         { USB_DEVICE(SIEMENS_VENDOR_ID, SIEMENS_PRODUCT_ID_X65) },
69         { USB_DEVICE(SIEMENS_VENDOR_ID, SIEMENS_PRODUCT_ID_X75) },
70         { USB_DEVICE(SIEMENS_VENDOR_ID, SIEMENS_PRODUCT_ID_EF81) },
71         { USB_DEVICE(BENQ_VENDOR_ID, BENQ_PRODUCT_ID_S81) }, /* Benq/Siemens S81 */
72         { USB_DEVICE(SYNTECH_VENDOR_ID, SYNTECH_PRODUCT_ID) },
73         { USB_DEVICE(NOKIA_CA42_VENDOR_ID, NOKIA_CA42_PRODUCT_ID) },
74         { USB_DEVICE(CA_42_CA42_VENDOR_ID, CA_42_CA42_PRODUCT_ID) },
75         { USB_DEVICE(SAGEM_VENDOR_ID, SAGEM_PRODUCT_ID) },
76         { USB_DEVICE(LEADTEK_VENDOR_ID, LEADTEK_9531_PRODUCT_ID) },
77         { USB_DEVICE(SPEEDDRAGON_VENDOR_ID, SPEEDDRAGON_PRODUCT_ID) },
78         { USB_DEVICE(DATAPILOT_U2_VENDOR_ID, DATAPILOT_U2_PRODUCT_ID) },
79         { USB_DEVICE(BELKIN_VENDOR_ID, BELKIN_PRODUCT_ID) },
80         { USB_DEVICE(ALCOR_VENDOR_ID, ALCOR_PRODUCT_ID) },
81         { USB_DEVICE(WS002IN_VENDOR_ID, WS002IN_PRODUCT_ID) },
82         { USB_DEVICE(COREGA_VENDOR_ID, COREGA_PRODUCT_ID) },
83         { USB_DEVICE(YCCABLE_VENDOR_ID, YCCABLE_PRODUCT_ID) },
84         { USB_DEVICE(SUPERIAL_VENDOR_ID, SUPERIAL_PRODUCT_ID) },
85         { USB_DEVICE(HP_VENDOR_ID, HP_LD220_PRODUCT_ID) },
86         { USB_DEVICE(CRESSI_VENDOR_ID, CRESSI_EDY_PRODUCT_ID) },
87         { USB_DEVICE(ZEAGLE_VENDOR_ID, ZEAGLE_N2ITION3_PRODUCT_ID) },
88         { USB_DEVICE(SONY_VENDOR_ID, SONY_QN3USB_PRODUCT_ID) },
89         { USB_DEVICE(SANWA_VENDOR_ID, SANWA_PRODUCT_ID) },
90         { USB_DEVICE(ADLINK_VENDOR_ID, ADLINK_ND6530_PRODUCT_ID) },
91         { USB_DEVICE(SMART_VENDOR_ID, SMART_PRODUCT_ID) },
92         { }                                     /* Terminating entry */
93 };
94
95 MODULE_DEVICE_TABLE(usb, id_table);
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
131 enum pl2303_type {
132         type_0,         /* don't know the difference between type 0 and */
133         type_1,         /* type 1, until someone from prolific tells us... */
134         HX,             /* HX version of the pl2303 chip */
135 };
136
137 struct pl2303_serial_private {
138         enum pl2303_type type;
139 };
140
141 struct pl2303_private {
142         spinlock_t lock;
143         u8 line_control;
144         u8 line_status;
145 };
146
147 static int pl2303_vendor_read(__u16 value, __u16 index,
148                 struct usb_serial *serial, unsigned char *buf)
149 {
150         int res = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
151                         VENDOR_READ_REQUEST, VENDOR_READ_REQUEST_TYPE,
152                         value, index, buf, 1, 100);
153         dev_dbg(&serial->interface->dev, "0x%x:0x%x:0x%x:0x%x  %d - %x\n",
154                 VENDOR_READ_REQUEST_TYPE, VENDOR_READ_REQUEST, value, index,
155                 res, buf[0]);
156         return res;
157 }
158
159 static int pl2303_vendor_write(__u16 value, __u16 index,
160                 struct usb_serial *serial)
161 {
162         int res = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
163                         VENDOR_WRITE_REQUEST, VENDOR_WRITE_REQUEST_TYPE,
164                         value, index, NULL, 0, 100);
165         dev_dbg(&serial->interface->dev, "0x%x:0x%x:0x%x:0x%x  %d\n",
166                 VENDOR_WRITE_REQUEST_TYPE, VENDOR_WRITE_REQUEST, value, index,
167                 res);
168         return res;
169 }
170
171 static int pl2303_startup(struct usb_serial *serial)
172 {
173         struct pl2303_serial_private *spriv;
174         enum pl2303_type type = type_0;
175         unsigned char *buf;
176
177         spriv = kzalloc(sizeof(*spriv), GFP_KERNEL);
178         if (!spriv)
179                 return -ENOMEM;
180
181         buf = kmalloc(10, GFP_KERNEL);
182         if (!buf) {
183                 kfree(spriv);
184                 return -ENOMEM;
185         }
186
187         if (serial->dev->descriptor.bDeviceClass == 0x02)
188                 type = type_0;
189         else if (serial->dev->descriptor.bMaxPacketSize0 == 0x40)
190                 type = HX;
191         else if (serial->dev->descriptor.bDeviceClass == 0x00)
192                 type = type_1;
193         else if (serial->dev->descriptor.bDeviceClass == 0xFF)
194                 type = type_1;
195         dev_dbg(&serial->interface->dev, "device type: %d\n", type);
196
197         spriv->type = type;
198         usb_set_serial_data(serial, spriv);
199
200         pl2303_vendor_read(0x8484, 0, serial, buf);
201         pl2303_vendor_write(0x0404, 0, serial);
202         pl2303_vendor_read(0x8484, 0, serial, buf);
203         pl2303_vendor_read(0x8383, 0, serial, buf);
204         pl2303_vendor_read(0x8484, 0, serial, buf);
205         pl2303_vendor_write(0x0404, 1, serial);
206         pl2303_vendor_read(0x8484, 0, serial, buf);
207         pl2303_vendor_read(0x8383, 0, serial, buf);
208         pl2303_vendor_write(0, 1, serial);
209         pl2303_vendor_write(1, 0, serial);
210         if (type == HX)
211                 pl2303_vendor_write(2, 0x44, serial);
212         else
213                 pl2303_vendor_write(2, 0x24, serial);
214
215         kfree(buf);
216         return 0;
217 }
218
219 static void pl2303_release(struct usb_serial *serial)
220 {
221         struct pl2303_serial_private *spriv;
222
223         spriv = usb_get_serial_data(serial);
224         kfree(spriv);
225 }
226
227 static int pl2303_port_probe(struct usb_serial_port *port)
228 {
229         struct pl2303_private *priv;
230
231         priv = kzalloc(sizeof(*priv), GFP_KERNEL);
232         if (!priv)
233                 return -ENOMEM;
234
235         spin_lock_init(&priv->lock);
236
237         usb_set_serial_port_data(port, priv);
238
239         port->port.drain_delay = 256;
240
241         return 0;
242 }
243
244 static int pl2303_port_remove(struct usb_serial_port *port)
245 {
246         struct pl2303_private *priv;
247
248         priv = usb_get_serial_port_data(port);
249         kfree(priv);
250
251         return 0;
252 }
253
254 static int pl2303_set_control_lines(struct usb_serial_port *port, u8 value)
255 {
256         struct usb_device *dev = port->serial->dev;
257         int retval;
258
259         retval = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
260                                  SET_CONTROL_REQUEST, SET_CONTROL_REQUEST_TYPE,
261                                  value, 0, NULL, 0, 100);
262         dev_dbg(&port->dev, "%s - value = %d, retval = %d\n", __func__,
263                 value, retval);
264         return retval;
265 }
266
267 static void pl2303_encode_baudrate(struct tty_struct *tty,
268                                         struct usb_serial_port *port,
269                                         u8 buf[4])
270 {
271         const int baud_sup[] = { 75, 150, 300, 600, 1200, 1800, 2400, 3600,
272                                  4800, 7200, 9600, 14400, 19200, 28800, 38400,
273                                  57600, 115200, 230400, 460800, 500000, 614400,
274                                  921600, 1228800, 2457600, 3000000, 6000000 };
275
276         struct usb_serial *serial = port->serial;
277         struct pl2303_serial_private *spriv = usb_get_serial_data(serial);
278         int baud;
279         int i;
280
281         /*
282          * NOTE: Only the values defined in baud_sup are supported!
283          *       => if unsupported values are set, the PL2303 seems to use
284          *          9600 baud (at least my PL2303X always does)
285          */
286         baud = tty_get_baud_rate(tty);
287         dev_dbg(&port->dev, "baud requested = %d\n", baud);
288         if (!baud)
289                 return;
290
291         /* Set baudrate to nearest supported value */
292         for (i = 0; i < ARRAY_SIZE(baud_sup); ++i) {
293                 if (baud_sup[i] > baud)
294                         break;
295         }
296
297         if (i == ARRAY_SIZE(baud_sup))
298                 baud = baud_sup[i - 1];
299         else if (i > 0 && (baud_sup[i] - baud) > (baud - baud_sup[i - 1]))
300                 baud = baud_sup[i - 1];
301         else
302                 baud = baud_sup[i];
303
304         /* type_0, type_1 only support up to 1228800 baud */
305         if (spriv->type != HX)
306                 baud = min_t(int, baud, 1228800);
307
308         if (baud <= 115200) {
309                 put_unaligned_le32(baud, buf);
310         } else {
311                 /*
312                  * Apparently the formula for higher speeds is:
313                  * baudrate = 12M * 32 / (2^buf[1]) / buf[0]
314                  */
315                 unsigned tmp = 12000000 * 32 / baud;
316                 buf[3] = 0x80;
317                 buf[2] = 0;
318                 buf[1] = (tmp >= 256);
319                 while (tmp >= 256) {
320                         tmp >>= 2;
321                         buf[1] <<= 1;
322                 }
323                 buf[0] = tmp;
324         }
325
326         /* Save resulting baud rate */
327         tty_encode_baud_rate(tty, baud, baud);
328         dev_dbg(&port->dev, "baud set = %d\n", baud);
329 }
330
331 static void pl2303_set_termios(struct tty_struct *tty,
332                 struct usb_serial_port *port, struct ktermios *old_termios)
333 {
334         struct usb_serial *serial = port->serial;
335         struct pl2303_serial_private *spriv = usb_get_serial_data(serial);
336         struct pl2303_private *priv = usb_get_serial_port_data(port);
337         unsigned long flags;
338         unsigned char *buf;
339         int i;
340         u8 control;
341
342         /*
343          * The PL2303 is reported to lose bytes if you change serial settings
344          * even to the same values as before. Thus we actually need to filter
345          * in this specific case.
346          */
347         if (old_termios && !tty_termios_hw_change(&tty->termios, old_termios))
348                 return;
349
350         buf = kzalloc(7, GFP_KERNEL);
351         if (!buf) {
352                 dev_err(&port->dev, "%s - out of memory.\n", __func__);
353                 /* Report back no change occurred */
354                 if (old_termios)
355                         tty->termios = *old_termios;
356                 return;
357         }
358
359         i = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
360                             GET_LINE_REQUEST, GET_LINE_REQUEST_TYPE,
361                             0, 0, buf, 7, 100);
362         dev_dbg(&port->dev, "0xa1:0x21:0:0  %d - %7ph\n", i, buf);
363
364         if (C_CSIZE(tty)) {
365                 switch (C_CSIZE(tty)) {
366                 case CS5:
367                         buf[6] = 5;
368                         break;
369                 case CS6:
370                         buf[6] = 6;
371                         break;
372                 case CS7:
373                         buf[6] = 7;
374                         break;
375                 default:
376                 case CS8:
377                         buf[6] = 8;
378                 }
379                 dev_dbg(&port->dev, "data bits = %d\n", buf[6]);
380         }
381
382         /* For reference buf[0]:buf[3] baud rate value */
383         pl2303_encode_baudrate(tty, port, &buf[0]);
384
385         /* For reference buf[4]=0 is 1 stop bits */
386         /* For reference buf[4]=1 is 1.5 stop bits */
387         /* For reference buf[4]=2 is 2 stop bits */
388         if (C_CSTOPB(tty)) {
389                 /*
390                  * NOTE: Comply with "real" UARTs / RS232:
391                  *       use 1.5 instead of 2 stop bits with 5 data bits
392                  */
393                 if (C_CSIZE(tty) == CS5) {
394                         buf[4] = 1;
395                         dev_dbg(&port->dev, "stop bits = 1.5\n");
396                 } else {
397                         buf[4] = 2;
398                         dev_dbg(&port->dev, "stop bits = 2\n");
399                 }
400         } else {
401                 buf[4] = 0;
402                 dev_dbg(&port->dev, "stop bits = 1\n");
403         }
404
405         if (C_PARENB(tty)) {
406                 /* For reference buf[5]=0 is none parity */
407                 /* For reference buf[5]=1 is odd parity */
408                 /* For reference buf[5]=2 is even parity */
409                 /* For reference buf[5]=3 is mark parity */
410                 /* For reference buf[5]=4 is space parity */
411                 if (C_PARODD(tty)) {
412                         if (tty->termios.c_cflag & CMSPAR) {
413                                 buf[5] = 3;
414                                 dev_dbg(&port->dev, "parity = mark\n");
415                         } else {
416                                 buf[5] = 1;
417                                 dev_dbg(&port->dev, "parity = odd\n");
418                         }
419                 } else {
420                         if (tty->termios.c_cflag & CMSPAR) {
421                                 buf[5] = 4;
422                                 dev_dbg(&port->dev, "parity = space\n");
423                         } else {
424                                 buf[5] = 2;
425                                 dev_dbg(&port->dev, "parity = even\n");
426                         }
427                 }
428         } else {
429                 buf[5] = 0;
430                 dev_dbg(&port->dev, "parity = none\n");
431         }
432
433         i = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
434                             SET_LINE_REQUEST, SET_LINE_REQUEST_TYPE,
435                             0, 0, buf, 7, 100);
436         dev_dbg(&port->dev, "0x21:0x20:0:0  %d\n", i);
437
438         /* change control lines if we are switching to or from B0 */
439         spin_lock_irqsave(&priv->lock, flags);
440         control = priv->line_control;
441         if (C_BAUD(tty) == B0)
442                 priv->line_control &= ~(CONTROL_DTR | CONTROL_RTS);
443         else if (old_termios && (old_termios->c_cflag & CBAUD) == B0)
444                 priv->line_control |= (CONTROL_DTR | CONTROL_RTS);
445         if (control != priv->line_control) {
446                 control = priv->line_control;
447                 spin_unlock_irqrestore(&priv->lock, flags);
448                 pl2303_set_control_lines(port, control);
449         } else {
450                 spin_unlock_irqrestore(&priv->lock, flags);
451         }
452
453         memset(buf, 0, 7);
454         i = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
455                             GET_LINE_REQUEST, GET_LINE_REQUEST_TYPE,
456                             0, 0, buf, 7, 100);
457         dev_dbg(&port->dev, "0xa1:0x21:0:0  %d - %7ph\n", i, buf);
458
459         if (C_CRTSCTS(tty)) {
460                 if (spriv->type == HX)
461                         pl2303_vendor_write(0x0, 0x61, serial);
462                 else
463                         pl2303_vendor_write(0x0, 0x41, serial);
464         } else {
465                 pl2303_vendor_write(0x0, 0x0, serial);
466         }
467
468         kfree(buf);
469 }
470
471 static void pl2303_dtr_rts(struct usb_serial_port *port, int on)
472 {
473         struct pl2303_private *priv = usb_get_serial_port_data(port);
474         unsigned long flags;
475         u8 control;
476
477         spin_lock_irqsave(&priv->lock, flags);
478         /* Change DTR and RTS */
479         if (on)
480                 priv->line_control |= (CONTROL_DTR | CONTROL_RTS);
481         else
482                 priv->line_control &= ~(CONTROL_DTR | CONTROL_RTS);
483         control = priv->line_control;
484         spin_unlock_irqrestore(&priv->lock, flags);
485         pl2303_set_control_lines(port, control);
486 }
487
488 static void pl2303_close(struct usb_serial_port *port)
489 {
490         usb_serial_generic_close(port);
491         usb_kill_urb(port->interrupt_in_urb);
492 }
493
494 static int pl2303_open(struct tty_struct *tty, struct usb_serial_port *port)
495 {
496         struct usb_serial *serial = port->serial;
497         struct pl2303_serial_private *spriv = usb_get_serial_data(serial);
498         int result;
499
500         if (spriv->type != HX) {
501                 usb_clear_halt(serial->dev, port->write_urb->pipe);
502                 usb_clear_halt(serial->dev, port->read_urb->pipe);
503         } else {
504                 /* reset upstream data pipes */
505                 pl2303_vendor_write(8, 0, serial);
506                 pl2303_vendor_write(9, 0, serial);
507         }
508
509         /* Setup termios */
510         if (tty)
511                 pl2303_set_termios(tty, port, NULL);
512
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                 return result;
518         }
519
520         result = usb_serial_generic_open(tty, port);
521         if (result) {
522                 usb_kill_urb(port->interrupt_in_urb);
523                 return result;
524         }
525
526         return 0;
527 }
528
529 static int pl2303_tiocmset(struct tty_struct *tty,
530                            unsigned int set, unsigned int clear)
531 {
532         struct usb_serial_port *port = tty->driver_data;
533         struct pl2303_private *priv = usb_get_serial_port_data(port);
534         unsigned long flags;
535         u8 control;
536         int ret;
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         ret = pl2303_set_control_lines(port, control);
551         if (ret)
552                 return usb_translate_errors(ret);
553
554         return 0;
555 }
556
557 static int pl2303_tiocmget(struct tty_struct *tty)
558 {
559         struct usb_serial_port *port = tty->driver_data;
560         struct pl2303_private *priv = usb_get_serial_port_data(port);
561         unsigned long flags;
562         unsigned int mcr;
563         unsigned int status;
564         unsigned int result;
565
566         spin_lock_irqsave(&priv->lock, flags);
567         mcr = priv->line_control;
568         status = priv->line_status;
569         spin_unlock_irqrestore(&priv->lock, flags);
570
571         result = ((mcr & CONTROL_DTR)           ? TIOCM_DTR : 0)
572                   | ((mcr & CONTROL_RTS)        ? TIOCM_RTS : 0)
573                   | ((status & UART_CTS)        ? TIOCM_CTS : 0)
574                   | ((status & UART_DSR)        ? TIOCM_DSR : 0)
575                   | ((status & UART_RING)       ? TIOCM_RI  : 0)
576                   | ((status & UART_DCD)        ? TIOCM_CD  : 0);
577
578         dev_dbg(&port->dev, "%s - result = %x\n", __func__, result);
579
580         return result;
581 }
582
583 static int pl2303_carrier_raised(struct usb_serial_port *port)
584 {
585         struct pl2303_private *priv = usb_get_serial_port_data(port);
586         if (priv->line_status & UART_DCD)
587                 return 1;
588         return 0;
589 }
590
591 static int pl2303_tiocmiwait(struct tty_struct *tty, unsigned long arg)
592 {
593         struct usb_serial_port *port = tty->driver_data;
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(&port->port.delta_msr_wait);
606                 /* see if a signal did it */
607                 if (signal_pending(current))
608                         return -ERESTARTSYS;
609
610                 if (port->serial->disconnected)
611                         return -EIO;
612
613                 spin_lock_irqsave(&priv->lock, flags);
614                 status = priv->line_status;
615                 spin_unlock_irqrestore(&priv->lock, flags);
616
617                 changed = prevstatus ^ status;
618
619                 if (((arg & TIOCM_RNG) && (changed & UART_RING)) ||
620                     ((arg & TIOCM_DSR) && (changed & UART_DSR)) ||
621                     ((arg & TIOCM_CD)  && (changed & UART_DCD)) ||
622                     ((arg & TIOCM_CTS) && (changed & UART_CTS))) {
623                         return 0;
624                 }
625                 prevstatus = status;
626         }
627         /* NOTREACHED */
628         return 0;
629 }
630
631 static int pl2303_ioctl(struct tty_struct *tty,
632                         unsigned int cmd, unsigned long arg)
633 {
634         struct serial_struct ser;
635         struct usb_serial_port *port = tty->driver_data;
636
637         dev_dbg(&port->dev, "%s cmd = 0x%04x\n", __func__, cmd);
638
639         switch (cmd) {
640         case TIOCGSERIAL:
641                 memset(&ser, 0, sizeof ser);
642                 ser.type = PORT_16654;
643                 ser.line = port->minor;
644                 ser.port = port->port_number;
645                 ser.baud_base = 460800;
646
647                 if (copy_to_user((void __user *)arg, &ser, sizeof ser))
648                         return -EFAULT;
649
650                 return 0;
651         default:
652                 dev_dbg(&port->dev, "%s not supported = 0x%04x\n", __func__, cmd);
653                 break;
654         }
655         return -ENOIOCTLCMD;
656 }
657
658 static 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         if (break_state == 0)
666                 state = BREAK_OFF;
667         else
668                 state = BREAK_ON;
669         dev_dbg(&port->dev, "%s - turning break %s\n", __func__,
670                         state == BREAK_OFF ? "off" : "on");
671
672         result = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
673                                  BREAK_REQUEST, BREAK_REQUEST_TYPE, state,
674                                  0, NULL, 0, 100);
675         if (result)
676                 dev_err(&port->dev, "error sending break = %d\n", result);
677 }
678
679 static void pl2303_update_line_status(struct usb_serial_port *port,
680                                       unsigned char *data,
681                                       unsigned int actual_length)
682 {
683
684         struct pl2303_private *priv = usb_get_serial_port_data(port);
685         struct tty_struct *tty;
686         unsigned long flags;
687         u8 status_idx = UART_STATE;
688         u8 length = UART_STATE + 1;
689         u8 prev_line_status;
690         u16 idv, idp;
691
692         idv = le16_to_cpu(port->serial->dev->descriptor.idVendor);
693         idp = le16_to_cpu(port->serial->dev->descriptor.idProduct);
694
695
696         if (idv == SIEMENS_VENDOR_ID) {
697                 if (idp == SIEMENS_PRODUCT_ID_X65 ||
698                     idp == SIEMENS_PRODUCT_ID_SX1 ||
699                     idp == SIEMENS_PRODUCT_ID_X75) {
700
701                         length = 1;
702                         status_idx = 0;
703                 }
704         }
705
706         if (actual_length < length)
707                 return;
708
709         /* Save off the uart status for others to look at */
710         spin_lock_irqsave(&priv->lock, flags);
711         prev_line_status = priv->line_status;
712         priv->line_status = data[status_idx];
713         spin_unlock_irqrestore(&priv->lock, flags);
714         if (priv->line_status & UART_BREAK_ERROR)
715                 usb_serial_handle_break(port);
716         wake_up_interruptible(&port->port.delta_msr_wait);
717
718         tty = tty_port_tty_get(&port->port);
719         if (!tty)
720                 return;
721         if ((priv->line_status ^ prev_line_status) & UART_DCD)
722                 usb_serial_handle_dcd_change(port, tty,
723                                 priv->line_status & UART_DCD);
724         tty_kref_put(tty);
725 }
726
727 static void pl2303_read_int_callback(struct urb *urb)
728 {
729         struct usb_serial_port *port =  urb->context;
730         unsigned char *data = urb->transfer_buffer;
731         unsigned int actual_length = urb->actual_length;
732         int status = urb->status;
733         int retval;
734
735         switch (status) {
736         case 0:
737                 /* success */
738                 break;
739         case -ECONNRESET:
740         case -ENOENT:
741         case -ESHUTDOWN:
742                 /* this urb is terminated, clean up */
743                 dev_dbg(&port->dev, "%s - urb shutting down with status: %d\n",
744                         __func__, status);
745                 return;
746         default:
747                 dev_dbg(&port->dev, "%s - nonzero urb status received: %d\n",
748                         __func__, status);
749                 goto exit;
750         }
751
752         usb_serial_debug_data(&port->dev, __func__,
753                               urb->actual_length, urb->transfer_buffer);
754
755         pl2303_update_line_status(port, data, actual_length);
756
757 exit:
758         retval = usb_submit_urb(urb, GFP_ATOMIC);
759         if (retval)
760                 dev_err(&port->dev,
761                         "%s - usb_submit_urb failed with result %d\n",
762                         __func__, retval);
763 }
764
765 static void pl2303_process_read_urb(struct urb *urb)
766 {
767         struct usb_serial_port *port = urb->context;
768         struct pl2303_private *priv = usb_get_serial_port_data(port);
769         unsigned char *data = urb->transfer_buffer;
770         char tty_flag = TTY_NORMAL;
771         unsigned long flags;
772         u8 line_status;
773         int i;
774
775         /* update line status */
776         spin_lock_irqsave(&priv->lock, flags);
777         line_status = priv->line_status;
778         priv->line_status &= ~UART_STATE_TRANSIENT_MASK;
779         spin_unlock_irqrestore(&priv->lock, flags);
780         wake_up_interruptible(&port->port.delta_msr_wait);
781
782         if (!urb->actual_length)
783                 return;
784
785         /* break takes precedence over parity, */
786         /* which takes precedence over framing errors */
787         if (line_status & UART_BREAK_ERROR)
788                 tty_flag = TTY_BREAK;
789         else if (line_status & UART_PARITY_ERROR)
790                 tty_flag = TTY_PARITY;
791         else if (line_status & UART_FRAME_ERROR)
792                 tty_flag = TTY_FRAME;
793
794         if (tty_flag != TTY_NORMAL)
795                 dev_dbg(&port->dev, "%s - tty_flag = %d\n", __func__,
796                                                                 tty_flag);
797         /* overrun is special, not associated with a char */
798         if (line_status & UART_OVERRUN_ERROR)
799                 tty_insert_flip_char(&port->port, 0, TTY_OVERRUN);
800
801         if (port->port.console && port->sysrq) {
802                 for (i = 0; i < urb->actual_length; ++i)
803                         if (!usb_serial_handle_sysrq_char(port, data[i]))
804                                 tty_insert_flip_char(&port->port, data[i],
805                                                 tty_flag);
806         } else {
807                 tty_insert_flip_string_fixed_flag(&port->port, data, tty_flag,
808                                                         urb->actual_length);
809         }
810
811         tty_flip_buffer_push(&port->port);
812 }
813
814 /* All of the device info needed for the PL2303 SIO serial converter */
815 static struct usb_serial_driver pl2303_device = {
816         .driver = {
817                 .owner =        THIS_MODULE,
818                 .name =         "pl2303",
819         },
820         .id_table =             id_table,
821         .num_ports =            1,
822         .bulk_in_size =         256,
823         .bulk_out_size =        256,
824         .open =                 pl2303_open,
825         .close =                pl2303_close,
826         .dtr_rts =              pl2303_dtr_rts,
827         .carrier_raised =       pl2303_carrier_raised,
828         .ioctl =                pl2303_ioctl,
829         .break_ctl =            pl2303_break_ctl,
830         .set_termios =          pl2303_set_termios,
831         .tiocmget =             pl2303_tiocmget,
832         .tiocmset =             pl2303_tiocmset,
833         .tiocmiwait =           pl2303_tiocmiwait,
834         .process_read_urb =     pl2303_process_read_urb,
835         .read_int_callback =    pl2303_read_int_callback,
836         .attach =               pl2303_startup,
837         .release =              pl2303_release,
838         .port_probe =           pl2303_port_probe,
839         .port_remove =          pl2303_port_remove,
840 };
841
842 static struct usb_serial_driver * const serial_drivers[] = {
843         &pl2303_device, NULL
844 };
845
846 module_usb_serial_driver(serial_drivers, id_table);
847
848 MODULE_DESCRIPTION(DRIVER_DESC);
849 MODULE_LICENSE("GPL");