Pull ia64-mutex-primitives into release branch
[linux-2.6] / drivers / usb / serial / pl2303.c
1 /*
2  * Prolific PL2303 USB to serial adaptor driver
3  *
4  * Copyright (C) 2001-2004 Greg Kroah-Hartman (greg@kroah.com)
5  * Copyright (C) 2003 IBM Corp.
6  *
7  * Original driver for 2.2.x by anonymous
8  *
9  *      This program is free software; you can redistribute it and/or modify
10  *      it under the terms of the GNU General Public License as published by
11  *      the Free Software Foundation; either version 2 of the License.
12  *
13  * See Documentation/usb/usb-serial.txt for more information on using this driver
14  *
15  */
16
17 #include <linux/config.h>
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 <asm/uaccess.h>
30 #include <linux/usb.h>
31 #include "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
39 static int debug;
40
41 #define PL2303_CLOSING_WAIT     (30*HZ)
42
43 #define PL2303_BUF_SIZE         1024
44 #define PL2303_TMP_BUF_SIZE     1024
45
46 struct pl2303_buf {
47         unsigned int    buf_size;
48         char            *buf_buf;
49         char            *buf_get;
50         char            *buf_put;
51 };
52
53 static struct usb_device_id id_table [] = {
54         { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID) },
55         { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_RSAQ2) },
56         { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_RSAQ3) },
57         { USB_DEVICE(PL2303_VENDOR_ID, PL2303_PRODUCT_ID_PHAROS) },
58         { USB_DEVICE(IODATA_VENDOR_ID, IODATA_PRODUCT_ID) },
59         { USB_DEVICE(ATEN_VENDOR_ID, ATEN_PRODUCT_ID) },
60         { USB_DEVICE(ATEN_VENDOR_ID2, ATEN_PRODUCT_ID) },
61         { USB_DEVICE(ELCOM_VENDOR_ID, ELCOM_PRODUCT_ID) },
62         { USB_DEVICE(ELCOM_VENDOR_ID, ELCOM_PRODUCT_ID_UCSGT) },
63         { USB_DEVICE(ITEGNO_VENDOR_ID, ITEGNO_PRODUCT_ID) },
64         { USB_DEVICE(MA620_VENDOR_ID, MA620_PRODUCT_ID) },
65         { USB_DEVICE(RATOC_VENDOR_ID, RATOC_PRODUCT_ID) },
66         { USB_DEVICE(TRIPP_VENDOR_ID, TRIPP_PRODUCT_ID) },
67         { USB_DEVICE(RADIOSHACK_VENDOR_ID, RADIOSHACK_PRODUCT_ID) },
68         { USB_DEVICE(DCU10_VENDOR_ID, DCU10_PRODUCT_ID) },
69         { USB_DEVICE(SITECOM_VENDOR_ID, SITECOM_PRODUCT_ID) },
70         { USB_DEVICE(ALCATEL_VENDOR_ID, ALCATEL_PRODUCT_ID) },
71         { USB_DEVICE(SAMSUNG_VENDOR_ID, SAMSUNG_PRODUCT_ID) },
72         { USB_DEVICE(SIEMENS_VENDOR_ID, SIEMENS_PRODUCT_ID_SX1) },
73         { USB_DEVICE(SIEMENS_VENDOR_ID, SIEMENS_PRODUCT_ID_X65) },
74         { USB_DEVICE(SIEMENS_VENDOR_ID, SIEMENS_PRODUCT_ID_X75) },
75         { USB_DEVICE(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         { }                                     /* Terminating entry */
81 };
82
83 MODULE_DEVICE_TABLE (usb, id_table);
84
85 static struct usb_driver pl2303_driver = {
86         .name =         "pl2303",
87         .probe =        usb_serial_probe,
88         .disconnect =   usb_serial_disconnect,
89         .id_table =     id_table,
90         .no_dynamic_id =        1,
91 };
92
93 #define SET_LINE_REQUEST_TYPE           0x21
94 #define SET_LINE_REQUEST                0x20
95
96 #define SET_CONTROL_REQUEST_TYPE        0x21
97 #define SET_CONTROL_REQUEST             0x22
98 #define CONTROL_DTR                     0x01
99 #define CONTROL_RTS                     0x02
100
101 #define BREAK_REQUEST_TYPE              0x21
102 #define BREAK_REQUEST                   0x23    
103 #define BREAK_ON                        0xffff
104 #define BREAK_OFF                       0x0000
105
106 #define GET_LINE_REQUEST_TYPE           0xa1
107 #define GET_LINE_REQUEST                0x21
108
109 #define VENDOR_WRITE_REQUEST_TYPE       0x40
110 #define VENDOR_WRITE_REQUEST            0x01
111
112 #define VENDOR_READ_REQUEST_TYPE        0xc0
113 #define VENDOR_READ_REQUEST             0x01
114
115 #define UART_STATE                      0x08
116 #define UART_STATE_TRANSIENT_MASK       0x74
117 #define UART_DCD                        0x01
118 #define UART_DSR                        0x02
119 #define UART_BREAK_ERROR                0x04
120 #define UART_RING                       0x08
121 #define UART_FRAME_ERROR                0x10
122 #define UART_PARITY_ERROR               0x20
123 #define UART_OVERRUN_ERROR              0x40
124 #define UART_CTS                        0x80
125
126 /* function prototypes for a PL2303 serial converter */
127 static int pl2303_open (struct usb_serial_port *port, struct file *filp);
128 static void pl2303_close (struct usb_serial_port *port, struct file *filp);
129 static void pl2303_set_termios (struct usb_serial_port *port,
130                                 struct termios *old);
131 static int pl2303_ioctl (struct usb_serial_port *port, struct file *file,
132                          unsigned int cmd, unsigned long arg);
133 static void pl2303_read_int_callback (struct urb *urb, struct pt_regs *regs);
134 static void pl2303_read_bulk_callback (struct urb *urb, struct pt_regs *regs);
135 static void pl2303_write_bulk_callback (struct urb *urb, struct pt_regs *regs);
136 static int pl2303_write (struct usb_serial_port *port,
137                          const unsigned char *buf, int count);
138 static void pl2303_send (struct usb_serial_port *port);
139 static int pl2303_write_room(struct usb_serial_port *port);
140 static int pl2303_chars_in_buffer(struct usb_serial_port *port);
141 static void pl2303_break_ctl(struct usb_serial_port *port,int break_state);
142 static int pl2303_tiocmget (struct usb_serial_port *port, struct file *file);
143 static int pl2303_tiocmset (struct usb_serial_port *port, struct file *file,
144                             unsigned int set, unsigned int clear);
145 static int pl2303_startup (struct usb_serial *serial);
146 static void pl2303_shutdown (struct usb_serial *serial);
147 static struct pl2303_buf *pl2303_buf_alloc(unsigned int size);
148 static void pl2303_buf_free(struct pl2303_buf *pb);
149 static void pl2303_buf_clear(struct pl2303_buf *pb);
150 static unsigned int pl2303_buf_data_avail(struct pl2303_buf *pb);
151 static unsigned int pl2303_buf_space_avail(struct pl2303_buf *pb);
152 static unsigned int pl2303_buf_put(struct pl2303_buf *pb, const char *buf,
153         unsigned int count);
154 static unsigned int pl2303_buf_get(struct pl2303_buf *pb, char *buf,
155         unsigned int count);
156
157
158 /* All of the device info needed for the PL2303 SIO serial converter */
159 static struct usb_serial_driver pl2303_device = {
160         .driver = {
161                 .owner =        THIS_MODULE,
162                 .name =         "pl2303",
163         },
164         .id_table =             id_table,
165         .num_interrupt_in =     NUM_DONT_CARE,
166         .num_bulk_in =          1,
167         .num_bulk_out =         1,
168         .num_ports =            1,
169         .open =                 pl2303_open,
170         .close =                pl2303_close,
171         .write =                pl2303_write,
172         .ioctl =                pl2303_ioctl,
173         .break_ctl =            pl2303_break_ctl,
174         .set_termios =          pl2303_set_termios,
175         .tiocmget =             pl2303_tiocmget,
176         .tiocmset =             pl2303_tiocmset,
177         .read_bulk_callback =   pl2303_read_bulk_callback,
178         .read_int_callback =    pl2303_read_int_callback,
179         .write_bulk_callback =  pl2303_write_bulk_callback,
180         .write_room =           pl2303_write_room,
181         .chars_in_buffer =      pl2303_chars_in_buffer,
182         .attach =               pl2303_startup,
183         .shutdown =             pl2303_shutdown,
184 };
185
186 enum pl2303_type {
187         type_0,         /* don't know the difference between type 0 and */
188         type_1,         /* type 1, until someone from prolific tells us... */
189         HX,             /* HX version of the pl2303 chip */
190 };
191
192 struct pl2303_private {
193         spinlock_t lock;
194         struct pl2303_buf *buf;
195         int write_urb_in_use;
196         wait_queue_head_t delta_msr_wait;
197         u8 line_control;
198         u8 line_status;
199         u8 termios_initialized;
200         enum pl2303_type type;
201 };
202
203
204 static int pl2303_startup (struct usb_serial *serial)
205 {
206         struct pl2303_private *priv;
207         enum pl2303_type type = type_0;
208         int i;
209
210         if (serial->dev->descriptor.bDeviceClass == 0x02)
211                 type = type_0;
212         else if (serial->dev->descriptor.bMaxPacketSize0 == 0x40)
213                 type = HX;
214         else if (serial->dev->descriptor.bDeviceClass == 0x00)
215                 type = type_1;
216         else if (serial->dev->descriptor.bDeviceClass == 0xFF)
217                 type = type_1;
218         dbg("device type: %d", type);
219
220         for (i = 0; i < serial->num_ports; ++i) {
221                 priv = kmalloc (sizeof (struct pl2303_private), GFP_KERNEL);
222                 if (!priv)
223                         goto cleanup;
224                 memset (priv, 0x00, sizeof (struct pl2303_private));
225                 spin_lock_init(&priv->lock);
226                 priv->buf = pl2303_buf_alloc(PL2303_BUF_SIZE);
227                 if (priv->buf == NULL) {
228                         kfree(priv);
229                         goto cleanup;
230                 }
231                 init_waitqueue_head(&priv->delta_msr_wait);
232                 priv->type = type;
233                 usb_set_serial_port_data(serial->port[i], priv);
234         }
235         return 0;
236
237 cleanup:
238         for (--i; i>=0; --i) {
239                 priv = usb_get_serial_port_data(serial->port[i]);
240                 pl2303_buf_free(priv->buf);
241                 kfree(priv);
242                 usb_set_serial_port_data(serial->port[i], NULL);
243         }
244         return -ENOMEM;
245 }
246
247 static int set_control_lines (struct usb_device *dev, u8 value)
248 {
249         int retval;
250         
251         retval = usb_control_msg (dev, usb_sndctrlpipe (dev, 0),
252                                   SET_CONTROL_REQUEST, SET_CONTROL_REQUEST_TYPE,
253                                   value, 0, NULL, 0, 100);
254         dbg("%s - value = %d, retval = %d", __FUNCTION__, value, retval);
255         return retval;
256 }
257
258 static int pl2303_write (struct usb_serial_port *port,  const unsigned char *buf, int count)
259 {
260         struct pl2303_private *priv = usb_get_serial_port_data(port);
261         unsigned long flags;
262
263         dbg("%s - port %d, %d bytes", __FUNCTION__, port->number, count);
264
265         if (!count)
266                 return count;
267
268         spin_lock_irqsave(&priv->lock, flags);
269         count = pl2303_buf_put(priv->buf, buf, count);
270         spin_unlock_irqrestore(&priv->lock, flags);
271
272         pl2303_send(port);
273
274         return count;
275 }
276
277 static void pl2303_send(struct usb_serial_port *port)
278 {
279         int count, result;
280         struct pl2303_private *priv = usb_get_serial_port_data(port);
281         unsigned long flags;
282
283         dbg("%s - port %d", __FUNCTION__, port->number);
284
285         spin_lock_irqsave(&priv->lock, flags);
286
287         if (priv->write_urb_in_use) {
288                 spin_unlock_irqrestore(&priv->lock, flags);
289                 return;
290         }
291
292         count = pl2303_buf_get(priv->buf, port->write_urb->transfer_buffer,
293                 port->bulk_out_size);
294
295         if (count == 0) {
296                 spin_unlock_irqrestore(&priv->lock, flags);
297                 return;
298         }
299
300         priv->write_urb_in_use = 1;
301
302         spin_unlock_irqrestore(&priv->lock, flags);
303
304         usb_serial_debug_data(debug, &port->dev, __FUNCTION__, count, port->write_urb->transfer_buffer);
305
306         port->write_urb->transfer_buffer_length = count;
307         port->write_urb->dev = port->serial->dev;
308         result = usb_submit_urb (port->write_urb, GFP_ATOMIC);
309         if (result) {
310                 dev_err(&port->dev, "%s - failed submitting write urb, error %d\n", __FUNCTION__, result);
311                 priv->write_urb_in_use = 0;
312                 // TODO: reschedule pl2303_send
313         }
314
315         schedule_work(&port->work);
316 }
317
318 static int pl2303_write_room(struct usb_serial_port *port)
319 {
320         struct pl2303_private *priv = usb_get_serial_port_data(port);
321         int room = 0;
322         unsigned long flags;
323
324         dbg("%s - port %d", __FUNCTION__, port->number);
325
326         spin_lock_irqsave(&priv->lock, flags);
327         room = pl2303_buf_space_avail(priv->buf);
328         spin_unlock_irqrestore(&priv->lock, flags);
329
330         dbg("%s - returns %d", __FUNCTION__, room);
331         return room;
332 }
333
334 static int pl2303_chars_in_buffer(struct usb_serial_port *port)
335 {
336         struct pl2303_private *priv = usb_get_serial_port_data(port);
337         int chars = 0;
338         unsigned long flags;
339
340         dbg("%s - port %d", __FUNCTION__, port->number);
341
342         spin_lock_irqsave(&priv->lock, flags);
343         chars = pl2303_buf_data_avail(priv->buf);
344         spin_unlock_irqrestore(&priv->lock, flags);
345
346         dbg("%s - returns %d", __FUNCTION__, chars);
347         return chars;
348 }
349
350 static void pl2303_set_termios (struct usb_serial_port *port, struct termios *old_termios)
351 {
352         struct usb_serial *serial = port->serial;
353         struct pl2303_private *priv = usb_get_serial_port_data(port);
354         unsigned long flags;
355         unsigned int cflag;
356         unsigned char *buf;
357         int baud;
358         int i;
359         u8 control;
360
361         dbg("%s -  port %d", __FUNCTION__, port->number);
362
363         if ((!port->tty) || (!port->tty->termios)) {
364                 dbg("%s - no tty structures", __FUNCTION__);
365                 return;
366         }
367
368         spin_lock_irqsave(&priv->lock, flags);
369         if (!priv->termios_initialized) {
370                 *(port->tty->termios) = tty_std_termios;
371                 port->tty->termios->c_cflag = B9600 | CS8 | CREAD | HUPCL | CLOCAL;
372                 priv->termios_initialized = 1;
373         }
374         spin_unlock_irqrestore(&priv->lock, flags);
375
376         cflag = port->tty->termios->c_cflag;
377         /* check that they really want us to change something */
378         if (old_termios) {
379                 if ((cflag == old_termios->c_cflag) &&
380                     (RELEVANT_IFLAG(port->tty->termios->c_iflag) == RELEVANT_IFLAG(old_termios->c_iflag))) {
381                     dbg("%s - nothing to change...", __FUNCTION__);
382                     return;
383                 }
384         }
385
386         buf = kmalloc (7, GFP_KERNEL);
387         if (!buf) {
388                 dev_err(&port->dev, "%s - out of memory.\n", __FUNCTION__);
389                 return;
390         }
391         memset (buf, 0x00, 0x07);
392         
393         i = usb_control_msg (serial->dev, usb_rcvctrlpipe (serial->dev, 0),
394                              GET_LINE_REQUEST, GET_LINE_REQUEST_TYPE,
395                              0, 0, buf, 7, 100);
396         dbg ("0xa1:0x21:0:0  %d - %x %x %x %x %x %x %x", i,
397              buf[0], buf[1], buf[2], buf[3], buf[4], buf[5], buf[6]);
398
399
400         if (cflag & CSIZE) {
401                 switch (cflag & CSIZE) {
402                         case CS5:       buf[6] = 5;     break;
403                         case CS6:       buf[6] = 6;     break;
404                         case CS7:       buf[6] = 7;     break;
405                         default:
406                         case CS8:       buf[6] = 8;     break;
407                 }
408                 dbg("%s - data bits = %d", __FUNCTION__, buf[6]);
409         }
410
411         baud = 0;
412         switch (cflag & CBAUD) {
413                 case B0:        baud = 0;       break;
414                 case B75:       baud = 75;      break;
415                 case B150:      baud = 150;     break;
416                 case B300:      baud = 300;     break;
417                 case B600:      baud = 600;     break;
418                 case B1200:     baud = 1200;    break;
419                 case B1800:     baud = 1800;    break;
420                 case B2400:     baud = 2400;    break;
421                 case B4800:     baud = 4800;    break;
422                 case B9600:     baud = 9600;    break;
423                 case B19200:    baud = 19200;   break;
424                 case B38400:    baud = 38400;   break;
425                 case B57600:    baud = 57600;   break;
426                 case B115200:   baud = 115200;  break;
427                 case B230400:   baud = 230400;  break;
428                 case B460800:   baud = 460800;  break;
429                 default:
430                         dev_err(&port->dev, "pl2303 driver does not support the baudrate requested (fix it)\n");
431                         break;
432         }
433         dbg("%s - baud = %d", __FUNCTION__, baud);
434         if (baud) {
435                 buf[0] = baud & 0xff;
436                 buf[1] = (baud >> 8) & 0xff;
437                 buf[2] = (baud >> 16) & 0xff;
438                 buf[3] = (baud >> 24) & 0xff;
439         }
440
441         /* For reference buf[4]=0 is 1 stop bits */
442         /* For reference buf[4]=1 is 1.5 stop bits */
443         /* For reference buf[4]=2 is 2 stop bits */
444         if (cflag & CSTOPB) {
445                 buf[4] = 2;
446                 dbg("%s - stop bits = 2", __FUNCTION__);
447         } else {
448                 buf[4] = 0;
449                 dbg("%s - stop bits = 1", __FUNCTION__);
450         }
451
452         if (cflag & PARENB) {
453                 /* For reference buf[5]=0 is none parity */
454                 /* For reference buf[5]=1 is odd parity */
455                 /* For reference buf[5]=2 is even parity */
456                 /* For reference buf[5]=3 is mark parity */
457                 /* For reference buf[5]=4 is space parity */
458                 if (cflag & PARODD) {
459                         buf[5] = 1;
460                         dbg("%s - parity = odd", __FUNCTION__);
461                 } else {
462                         buf[5] = 2;
463                         dbg("%s - parity = even", __FUNCTION__);
464                 }
465         } else {
466                 buf[5] = 0;
467                 dbg("%s - parity = none", __FUNCTION__);
468         }
469
470         i = usb_control_msg (serial->dev, usb_sndctrlpipe (serial->dev, 0),
471                              SET_LINE_REQUEST, SET_LINE_REQUEST_TYPE, 
472                              0, 0, buf, 7, 100);
473         dbg ("0x21:0x20:0:0  %d", i);
474
475         /* change control lines if we are switching to or from B0 */
476         spin_lock_irqsave(&priv->lock, flags);
477         control = priv->line_control;
478         if ((cflag & CBAUD) == B0)
479                 priv->line_control &= ~(CONTROL_DTR | CONTROL_RTS);
480         else
481                 priv->line_control |= (CONTROL_DTR | CONTROL_RTS);
482         if (control != priv->line_control) {
483                 control = priv->line_control;
484                 spin_unlock_irqrestore(&priv->lock, flags);
485                 set_control_lines(serial->dev, control);
486         } else {
487                 spin_unlock_irqrestore(&priv->lock, flags);
488         }
489         
490         buf[0] = buf[1] = buf[2] = buf[3] = buf[4] = buf[5] = buf[6] = 0;
491
492         i = usb_control_msg (serial->dev, usb_rcvctrlpipe (serial->dev, 0),
493                              GET_LINE_REQUEST, GET_LINE_REQUEST_TYPE,
494                              0, 0, buf, 7, 100);
495         dbg ("0xa1:0x21:0:0  %d - %x %x %x %x %x %x %x", i,
496              buf[0], buf[1], buf[2], buf[3], buf[4], buf[5], buf[6]);
497
498         if (cflag & CRTSCTS) {
499                 __u16 index;
500                 if (priv->type == HX)
501                         index = 0x61;
502                 else
503                         index = 0x41;
504                 i = usb_control_msg(serial->dev, 
505                                     usb_sndctrlpipe(serial->dev, 0),
506                                     VENDOR_WRITE_REQUEST,
507                                     VENDOR_WRITE_REQUEST_TYPE,
508                                     0x0, index, NULL, 0, 100);
509                 dbg ("0x40:0x1:0x0:0x%x  %d", index, i);
510         }
511
512         kfree (buf);
513 }
514
515 static int pl2303_open (struct usb_serial_port *port, struct file *filp)
516 {
517         struct termios tmp_termios;
518         struct usb_serial *serial = port->serial;
519         struct pl2303_private *priv = usb_get_serial_port_data(port);
520         unsigned char *buf;
521         int result;
522
523         dbg("%s -  port %d", __FUNCTION__, port->number);
524
525         if (priv->type != HX) {
526                 usb_clear_halt(serial->dev, port->write_urb->pipe);
527                 usb_clear_halt(serial->dev, port->read_urb->pipe);
528         }
529
530         buf = kmalloc(10, GFP_KERNEL);
531         if (buf==NULL)
532                 return -ENOMEM;
533
534 #define FISH(a,b,c,d)                                                           \
535         result=usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev,0),     \
536                                b, a, c, d, buf, 1, 100);                        \
537         dbg("0x%x:0x%x:0x%x:0x%x  %d - %x",a,b,c,d,result,buf[0]);
538
539 #define SOUP(a,b,c,d)                                                           \
540         result=usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev,0),     \
541                                b, a, c, d, NULL, 0, 100);                       \
542         dbg("0x%x:0x%x:0x%x:0x%x  %d",a,b,c,d,result);
543
544         FISH (VENDOR_READ_REQUEST_TYPE, VENDOR_READ_REQUEST, 0x8484, 0);
545         SOUP (VENDOR_WRITE_REQUEST_TYPE, VENDOR_WRITE_REQUEST, 0x0404, 0);
546         FISH (VENDOR_READ_REQUEST_TYPE, VENDOR_READ_REQUEST, 0x8484, 0);
547         FISH (VENDOR_READ_REQUEST_TYPE, VENDOR_READ_REQUEST, 0x8383, 0);
548         FISH (VENDOR_READ_REQUEST_TYPE, VENDOR_READ_REQUEST, 0x8484, 0);
549         SOUP (VENDOR_WRITE_REQUEST_TYPE, VENDOR_WRITE_REQUEST, 0x0404, 1);
550         FISH (VENDOR_READ_REQUEST_TYPE, VENDOR_READ_REQUEST, 0x8484, 0);
551         FISH (VENDOR_READ_REQUEST_TYPE, VENDOR_READ_REQUEST, 0x8383, 0);
552         SOUP (VENDOR_WRITE_REQUEST_TYPE, VENDOR_WRITE_REQUEST, 0, 1);
553         SOUP (VENDOR_WRITE_REQUEST_TYPE, VENDOR_WRITE_REQUEST, 1, 0);
554
555         if (priv->type == HX) {
556                 /* HX chip */
557                 SOUP (VENDOR_WRITE_REQUEST_TYPE, VENDOR_WRITE_REQUEST, 2, 0x44);
558                 /* reset upstream data pipes */
559                 SOUP (VENDOR_WRITE_REQUEST_TYPE, VENDOR_WRITE_REQUEST, 8, 0);
560                 SOUP (VENDOR_WRITE_REQUEST_TYPE, VENDOR_WRITE_REQUEST, 9, 0);
561         } else {
562                 SOUP (VENDOR_WRITE_REQUEST_TYPE, VENDOR_WRITE_REQUEST, 2, 0x24);
563         }
564
565         kfree(buf);
566
567         /* Setup termios */
568         if (port->tty) {
569                 pl2303_set_termios (port, &tmp_termios);
570         }
571
572         //FIXME: need to assert RTS and DTR if CRTSCTS off
573
574         dbg("%s - submitting read urb", __FUNCTION__);
575         port->read_urb->dev = serial->dev;
576         result = usb_submit_urb (port->read_urb, GFP_KERNEL);
577         if (result) {
578                 dev_err(&port->dev, "%s - failed submitting read urb, error %d\n", __FUNCTION__, result);
579                 pl2303_close (port, NULL);
580                 return -EPROTO;
581         }
582
583         dbg("%s - submitting interrupt urb", __FUNCTION__);
584         port->interrupt_in_urb->dev = serial->dev;
585         result = usb_submit_urb (port->interrupt_in_urb, GFP_KERNEL);
586         if (result) {
587                 dev_err(&port->dev, "%s - failed submitting interrupt urb, error %d\n", __FUNCTION__, result);
588                 pl2303_close (port, NULL);
589                 return -EPROTO;
590         }
591         return 0;
592 }
593
594
595 static void pl2303_close (struct usb_serial_port *port, struct file *filp)
596 {
597         struct pl2303_private *priv = usb_get_serial_port_data(port);
598         unsigned long flags;
599         unsigned int c_cflag;
600         int bps;
601         long timeout;
602         wait_queue_t wait;                                              \
603
604         dbg("%s - port %d", __FUNCTION__, port->number);
605
606         /* wait for data to drain from the buffer */
607         spin_lock_irqsave(&priv->lock, flags);
608         timeout = PL2303_CLOSING_WAIT;
609         init_waitqueue_entry(&wait, current);
610         add_wait_queue(&port->tty->write_wait, &wait);
611         for (;;) {
612                 set_current_state(TASK_INTERRUPTIBLE);
613                 if (pl2303_buf_data_avail(priv->buf) == 0
614                 || timeout == 0 || signal_pending(current)
615                 || !usb_get_intfdata(port->serial->interface))  /* disconnect */
616                         break;
617                 spin_unlock_irqrestore(&priv->lock, flags);
618                 timeout = schedule_timeout(timeout);
619                 spin_lock_irqsave(&priv->lock, flags);
620         }
621         set_current_state(TASK_RUNNING);
622         remove_wait_queue(&port->tty->write_wait, &wait);
623         /* clear out any remaining data in the buffer */
624         pl2303_buf_clear(priv->buf);
625         spin_unlock_irqrestore(&priv->lock, flags);
626
627         /* wait for characters to drain from the device */
628         /* (this is long enough for the entire 256 byte */
629         /* pl2303 hardware buffer to drain with no flow */
630         /* control for data rates of 1200 bps or more, */
631         /* for lower rates we should really know how much */
632         /* data is in the buffer to compute a delay */
633         /* that is not unnecessarily long) */
634         bps = tty_get_baud_rate(port->tty);
635         if (bps > 1200)
636                 timeout = max((HZ*2560)/bps,HZ/10);
637         else
638                 timeout = 2*HZ;
639         schedule_timeout_interruptible(timeout);
640
641         /* shutdown our urbs */
642         dbg("%s - shutting down urbs", __FUNCTION__);
643         usb_kill_urb(port->write_urb);
644         usb_kill_urb(port->read_urb);
645         usb_kill_urb(port->interrupt_in_urb);
646
647         if (port->tty) {
648                 c_cflag = port->tty->termios->c_cflag;
649                 if (c_cflag & HUPCL) {
650                         /* drop DTR and RTS */
651                         spin_lock_irqsave(&priv->lock, flags);
652                         priv->line_control = 0;
653                         spin_unlock_irqrestore (&priv->lock, flags);
654                         set_control_lines (port->serial->dev, 0);
655                 }
656         }
657 }
658
659 static int pl2303_tiocmset (struct usb_serial_port *port, struct file *file,
660                             unsigned int set, unsigned int clear)
661 {
662         struct pl2303_private *priv = usb_get_serial_port_data(port);
663         unsigned long flags;
664         u8 control;
665
666         if (!usb_get_intfdata(port->serial->interface))
667                 return -ENODEV;
668
669         spin_lock_irqsave (&priv->lock, flags);
670         if (set & TIOCM_RTS)
671                 priv->line_control |= CONTROL_RTS;
672         if (set & TIOCM_DTR)
673                 priv->line_control |= CONTROL_DTR;
674         if (clear & TIOCM_RTS)
675                 priv->line_control &= ~CONTROL_RTS;
676         if (clear & TIOCM_DTR)
677                 priv->line_control &= ~CONTROL_DTR;
678         control = priv->line_control;
679         spin_unlock_irqrestore (&priv->lock, flags);
680
681         return set_control_lines (port->serial->dev, control);
682 }
683
684 static int pl2303_tiocmget (struct usb_serial_port *port, struct file *file)
685 {
686         struct pl2303_private *priv = usb_get_serial_port_data(port);
687         unsigned long flags;
688         unsigned int mcr;
689         unsigned int status;
690         unsigned int result;
691
692         dbg("%s (%d)", __FUNCTION__, port->number);
693
694         if (!usb_get_intfdata(port->serial->interface))
695                 return -ENODEV;
696
697         spin_lock_irqsave (&priv->lock, flags);
698         mcr = priv->line_control;
699         status = priv->line_status;
700         spin_unlock_irqrestore (&priv->lock, flags);
701
702         result = ((mcr & CONTROL_DTR)           ? TIOCM_DTR : 0)
703                   | ((mcr & CONTROL_RTS)        ? TIOCM_RTS : 0)
704                   | ((status & UART_CTS)        ? TIOCM_CTS : 0)
705                   | ((status & UART_DSR)        ? TIOCM_DSR : 0)
706                   | ((status & UART_RING)       ? TIOCM_RI  : 0)
707                   | ((status & UART_DCD)        ? TIOCM_CD  : 0);
708
709         dbg("%s - result = %x", __FUNCTION__, result);
710
711         return result;
712 }
713
714 static int wait_modem_info(struct usb_serial_port *port, unsigned int arg)
715 {
716         struct pl2303_private *priv = usb_get_serial_port_data(port);
717         unsigned long flags;
718         unsigned int prevstatus;
719         unsigned int status;
720         unsigned int changed;
721
722         spin_lock_irqsave (&priv->lock, flags);
723         prevstatus = priv->line_status;
724         spin_unlock_irqrestore (&priv->lock, flags);
725
726         while (1) {
727                 interruptible_sleep_on(&priv->delta_msr_wait);
728                 /* see if a signal did it */
729                 if (signal_pending(current))
730                         return -ERESTARTSYS;
731                 
732                 spin_lock_irqsave (&priv->lock, flags);
733                 status = priv->line_status;
734                 spin_unlock_irqrestore (&priv->lock, flags);
735                 
736                 changed=prevstatus^status;
737                 
738                 if (((arg & TIOCM_RNG) && (changed & UART_RING)) ||
739                     ((arg & TIOCM_DSR) && (changed & UART_DSR)) ||
740                     ((arg & TIOCM_CD)  && (changed & UART_DCD)) ||
741                     ((arg & TIOCM_CTS) && (changed & UART_CTS)) ) {
742                         return 0;
743                 }
744                 prevstatus = status;
745         }
746         /* NOTREACHED */
747         return 0;
748 }
749
750 static int pl2303_ioctl (struct usb_serial_port *port, struct file *file, unsigned int cmd, unsigned long arg)
751 {
752         dbg("%s (%d) cmd = 0x%04x", __FUNCTION__, port->number, cmd);
753
754         switch (cmd) {
755                 case TIOCMIWAIT:
756                         dbg("%s (%d) TIOCMIWAIT", __FUNCTION__,  port->number);
757                         return wait_modem_info(port, arg);
758
759                 default:
760                         dbg("%s not supported = 0x%04x", __FUNCTION__, cmd);
761                         break;
762         }
763
764         return -ENOIOCTLCMD;
765 }
766
767 static void pl2303_break_ctl (struct usb_serial_port *port, int break_state)
768 {
769         struct usb_serial *serial = port->serial;
770         u16 state;
771         int result;
772
773         dbg("%s - port %d", __FUNCTION__, port->number);
774
775         if (break_state == 0)
776                 state = BREAK_OFF;
777         else
778                 state = BREAK_ON;
779         dbg("%s - turning break %s", __FUNCTION__, state==BREAK_OFF ? "off" : "on");
780
781         result = usb_control_msg (serial->dev, usb_sndctrlpipe (serial->dev, 0),
782                                   BREAK_REQUEST, BREAK_REQUEST_TYPE, state, 
783                                   0, NULL, 0, 100);
784         if (result)
785                 dbg("%s - error sending break = %d", __FUNCTION__, result);
786 }
787
788
789 static void pl2303_shutdown (struct usb_serial *serial)
790 {
791         int i;
792         struct pl2303_private *priv;
793
794         dbg("%s", __FUNCTION__);
795
796         for (i = 0; i < serial->num_ports; ++i) {
797                 priv = usb_get_serial_port_data(serial->port[i]);
798                 if (priv) {
799                         pl2303_buf_free(priv->buf);
800                         kfree(priv);
801                         usb_set_serial_port_data(serial->port[i], NULL);
802                 }
803         }               
804 }
805
806 static void pl2303_update_line_status(struct usb_serial_port *port,
807                                       unsigned char *data,
808                                       unsigned int actual_length)
809 {
810
811         struct pl2303_private *priv = usb_get_serial_port_data(port);
812         unsigned long flags;
813         u8 status_idx = UART_STATE;
814         u8 length = UART_STATE + 1;
815
816         if ((le16_to_cpu(port->serial->dev->descriptor.idVendor) == SIEMENS_VENDOR_ID) &&
817             (le16_to_cpu(port->serial->dev->descriptor.idProduct) == SIEMENS_PRODUCT_ID_X65 ||
818              le16_to_cpu(port->serial->dev->descriptor.idProduct) == SIEMENS_PRODUCT_ID_SX1 ||
819              le16_to_cpu(port->serial->dev->descriptor.idProduct) == SIEMENS_PRODUCT_ID_X75)) {
820                 length = 1;
821                 status_idx = 0;
822         }
823
824         if (actual_length < length)
825                 goto exit;
826
827         /* Save off the uart status for others to look at */
828         spin_lock_irqsave(&priv->lock, flags);
829         priv->line_status = data[status_idx];
830         spin_unlock_irqrestore(&priv->lock, flags);
831
832 exit:
833         return;
834 }
835
836 static void pl2303_read_int_callback (struct urb *urb, struct pt_regs *regs)
837 {
838         struct usb_serial_port *port = (struct usb_serial_port *) urb->context;
839         unsigned char *data = urb->transfer_buffer;
840         unsigned int actual_length = urb->actual_length;
841         int status;
842
843         dbg("%s (%d)", __FUNCTION__, port->number);
844
845         switch (urb->status) {
846         case 0:
847                 /* success */
848                 break;
849         case -ECONNRESET:
850         case -ENOENT:
851         case -ESHUTDOWN:
852                 /* this urb is terminated, clean up */
853                 dbg("%s - urb shutting down with status: %d", __FUNCTION__, urb->status);
854                 return;
855         default:
856                 dbg("%s - nonzero urb status received: %d", __FUNCTION__, urb->status);
857                 goto exit;
858         }
859
860         usb_serial_debug_data(debug, &port->dev, __FUNCTION__, urb->actual_length, urb->transfer_buffer);
861         pl2303_update_line_status(port, data, actual_length);
862
863 exit:
864         status = usb_submit_urb (urb, GFP_ATOMIC);
865         if (status)
866                 dev_err(&urb->dev->dev, "%s - usb_submit_urb failed with result %d\n",
867                         __FUNCTION__, status);
868 }
869
870
871 static void pl2303_read_bulk_callback (struct urb *urb, struct pt_regs *regs)
872 {
873         struct usb_serial_port *port = (struct usb_serial_port *) urb->context;
874         struct pl2303_private *priv = usb_get_serial_port_data(port);
875         struct tty_struct *tty;
876         unsigned char *data = urb->transfer_buffer;
877         unsigned long flags;
878         int i;
879         int result;
880         u8 status;
881         char tty_flag;
882
883         dbg("%s - port %d", __FUNCTION__, port->number);
884
885         if (urb->status) {
886                 dbg("%s - urb->status = %d", __FUNCTION__, urb->status);
887                 if (!port->open_count) {
888                         dbg("%s - port is closed, exiting.", __FUNCTION__);
889                         return;
890                 }
891                 if (urb->status == -EPROTO) {
892                         /* PL2303 mysteriously fails with -EPROTO reschedule the read */
893                         dbg("%s - caught -EPROTO, resubmitting the urb", __FUNCTION__);
894                         urb->status = 0;
895                         urb->dev = port->serial->dev;
896                         result = usb_submit_urb(urb, GFP_ATOMIC);
897                         if (result)
898                                 dev_err(&urb->dev->dev, "%s - failed resubmitting read urb, error %d\n", __FUNCTION__, result);
899                         return;
900                 }
901                 dbg("%s - unable to handle the error, exiting.", __FUNCTION__);
902                 return;
903         }
904
905         usb_serial_debug_data(debug, &port->dev, __FUNCTION__, urb->actual_length, data);
906
907         /* get tty_flag from status */
908         tty_flag = TTY_NORMAL;
909
910         spin_lock_irqsave(&priv->lock, flags);
911         status = priv->line_status;
912         priv->line_status &= ~UART_STATE_TRANSIENT_MASK;
913         spin_unlock_irqrestore(&priv->lock, flags);
914         wake_up_interruptible (&priv->delta_msr_wait);
915
916         /* break takes precedence over parity, */
917         /* which takes precedence over framing errors */
918         if (status & UART_BREAK_ERROR )
919                 tty_flag = TTY_BREAK;
920         else if (status & UART_PARITY_ERROR)
921                 tty_flag = TTY_PARITY;
922         else if (status & UART_FRAME_ERROR)
923                 tty_flag = TTY_FRAME;
924         dbg("%s - tty_flag = %d", __FUNCTION__, tty_flag);
925
926         tty = port->tty;
927         if (tty && urb->actual_length) {
928                 tty_buffer_request_room(tty, urb->actual_length + 1);
929                 /* overrun is special, not associated with a char */
930                 if (status & UART_OVERRUN_ERROR)
931                         tty_insert_flip_char(tty, 0, TTY_OVERRUN);
932                 for (i = 0; i < urb->actual_length; ++i)
933                         tty_insert_flip_char (tty, data[i], tty_flag);
934                 tty_flip_buffer_push (tty);
935         }
936
937         /* Schedule the next read _if_ we are still open */
938         if (port->open_count) {
939                 urb->dev = port->serial->dev;
940                 result = usb_submit_urb(urb, GFP_ATOMIC);
941                 if (result)
942                         dev_err(&urb->dev->dev, "%s - failed resubmitting read urb, error %d\n", __FUNCTION__, result);
943         }
944
945         return;
946 }
947
948
949
950 static void pl2303_write_bulk_callback (struct urb *urb, struct pt_regs *regs)
951 {
952         struct usb_serial_port *port = (struct usb_serial_port *) urb->context;
953         struct pl2303_private *priv = usb_get_serial_port_data(port);
954         int result;
955
956         dbg("%s - port %d", __FUNCTION__, port->number);
957
958         switch (urb->status) {
959         case 0:
960                 /* success */
961                 break;
962         case -ECONNRESET:
963         case -ENOENT:
964         case -ESHUTDOWN:
965                 /* this urb is terminated, clean up */
966                 dbg("%s - urb shutting down with status: %d", __FUNCTION__, urb->status);
967                 priv->write_urb_in_use = 0;
968                 return;
969         default:
970                 /* error in the urb, so we have to resubmit it */
971                 dbg("%s - Overflow in write", __FUNCTION__);
972                 dbg("%s - nonzero write bulk status received: %d", __FUNCTION__, urb->status);
973                 port->write_urb->transfer_buffer_length = 1;
974                 port->write_urb->dev = port->serial->dev;
975                 result = usb_submit_urb (port->write_urb, GFP_ATOMIC);
976                 if (result)
977                         dev_err(&urb->dev->dev, "%s - failed resubmitting write urb, error %d\n", __FUNCTION__, result);
978                 else
979                         return;
980         }
981
982         priv->write_urb_in_use = 0;
983
984         /* send any buffered data */
985         pl2303_send(port);
986 }
987
988
989 /*
990  * pl2303_buf_alloc
991  *
992  * Allocate a circular buffer and all associated memory.
993  */
994
995 static struct pl2303_buf *pl2303_buf_alloc(unsigned int size)
996 {
997
998         struct pl2303_buf *pb;
999
1000
1001         if (size == 0)
1002                 return NULL;
1003
1004         pb = (struct pl2303_buf *)kmalloc(sizeof(struct pl2303_buf), GFP_KERNEL);
1005         if (pb == NULL)
1006                 return NULL;
1007
1008         pb->buf_buf = kmalloc(size, GFP_KERNEL);
1009         if (pb->buf_buf == NULL) {
1010                 kfree(pb);
1011                 return NULL;
1012         }
1013
1014         pb->buf_size = size;
1015         pb->buf_get = pb->buf_put = pb->buf_buf;
1016
1017         return pb;
1018
1019 }
1020
1021
1022 /*
1023  * pl2303_buf_free
1024  *
1025  * Free the buffer and all associated memory.
1026  */
1027
1028 static void pl2303_buf_free(struct pl2303_buf *pb)
1029 {
1030         if (pb) {
1031                 kfree(pb->buf_buf);
1032                 kfree(pb);
1033         }
1034 }
1035
1036
1037 /*
1038  * pl2303_buf_clear
1039  *
1040  * Clear out all data in the circular buffer.
1041  */
1042
1043 static void pl2303_buf_clear(struct pl2303_buf *pb)
1044 {
1045         if (pb != NULL)
1046                 pb->buf_get = pb->buf_put;
1047                 /* equivalent to a get of all data available */
1048 }
1049
1050
1051 /*
1052  * pl2303_buf_data_avail
1053  *
1054  * Return the number of bytes of data available in the circular
1055  * buffer.
1056  */
1057
1058 static unsigned int pl2303_buf_data_avail(struct pl2303_buf *pb)
1059 {
1060         if (pb != NULL)
1061                 return ((pb->buf_size + pb->buf_put - pb->buf_get) % pb->buf_size);
1062         else
1063                 return 0;
1064 }
1065
1066
1067 /*
1068  * pl2303_buf_space_avail
1069  *
1070  * Return the number of bytes of space available in the circular
1071  * buffer.
1072  */
1073
1074 static unsigned int pl2303_buf_space_avail(struct pl2303_buf *pb)
1075 {
1076         if (pb != NULL)
1077                 return ((pb->buf_size + pb->buf_get - pb->buf_put - 1) % pb->buf_size);
1078         else
1079                 return 0;
1080 }
1081
1082
1083 /*
1084  * pl2303_buf_put
1085  *
1086  * Copy data data from a user buffer and put it into the circular buffer.
1087  * Restrict to the amount of space available.
1088  *
1089  * Return the number of bytes copied.
1090  */
1091
1092 static unsigned int pl2303_buf_put(struct pl2303_buf *pb, const char *buf,
1093         unsigned int count)
1094 {
1095
1096         unsigned int len;
1097
1098
1099         if (pb == NULL)
1100                 return 0;
1101
1102         len  = pl2303_buf_space_avail(pb);
1103         if (count > len)
1104                 count = len;
1105
1106         if (count == 0)
1107                 return 0;
1108
1109         len = pb->buf_buf + pb->buf_size - pb->buf_put;
1110         if (count > len) {
1111                 memcpy(pb->buf_put, buf, len);
1112                 memcpy(pb->buf_buf, buf+len, count - len);
1113                 pb->buf_put = pb->buf_buf + count - len;
1114         } else {
1115                 memcpy(pb->buf_put, buf, count);
1116                 if (count < len)
1117                         pb->buf_put += count;
1118                 else /* count == len */
1119                         pb->buf_put = pb->buf_buf;
1120         }
1121
1122         return count;
1123
1124 }
1125
1126
1127 /*
1128  * pl2303_buf_get
1129  *
1130  * Get data from the circular buffer and copy to the given buffer.
1131  * Restrict to the amount of data available.
1132  *
1133  * Return the number of bytes copied.
1134  */
1135
1136 static unsigned int pl2303_buf_get(struct pl2303_buf *pb, char *buf,
1137         unsigned int count)
1138 {
1139
1140         unsigned int len;
1141
1142
1143         if (pb == NULL)
1144                 return 0;
1145
1146         len = pl2303_buf_data_avail(pb);
1147         if (count > len)
1148                 count = len;
1149
1150         if (count == 0)
1151                 return 0;
1152
1153         len = pb->buf_buf + pb->buf_size - pb->buf_get;
1154         if (count > len) {
1155                 memcpy(buf, pb->buf_get, len);
1156                 memcpy(buf+len, pb->buf_buf, count - len);
1157                 pb->buf_get = pb->buf_buf + count - len;
1158         } else {
1159                 memcpy(buf, pb->buf_get, count);
1160                 if (count < len)
1161                         pb->buf_get += count;
1162                 else /* count == len */
1163                         pb->buf_get = pb->buf_buf;
1164         }
1165
1166         return count;
1167
1168 }
1169
1170 static int __init pl2303_init (void)
1171 {
1172         int retval;
1173         retval = usb_serial_register(&pl2303_device);
1174         if (retval)
1175                 goto failed_usb_serial_register;
1176         retval = usb_register(&pl2303_driver);
1177         if (retval)
1178                 goto failed_usb_register;
1179         info(DRIVER_DESC);
1180         return 0;
1181 failed_usb_register:
1182         usb_serial_deregister(&pl2303_device);
1183 failed_usb_serial_register:
1184         return retval;
1185 }
1186
1187
1188 static void __exit pl2303_exit (void)
1189 {
1190         usb_deregister (&pl2303_driver);
1191         usb_serial_deregister (&pl2303_device);
1192 }
1193
1194
1195 module_init(pl2303_init);
1196 module_exit(pl2303_exit);
1197
1198 MODULE_DESCRIPTION(DRIVER_DESC);
1199 MODULE_LICENSE("GPL");
1200
1201 module_param(debug, bool, S_IRUGO | S_IWUSR);
1202 MODULE_PARM_DESC(debug, "Debug enabled or not");
1203