USB: CP210x Add new device IDs
[linux-2.6.git] / drivers / usb / serial / cp210x.c
1 /*
2  * Silicon Laboratories CP210x USB to RS232 serial adaptor driver
3  *
4  * Copyright (C) 2005 Craig Shelley (craig@microtron.org.uk)
5  *
6  *      This program is free software; you can redistribute it and/or
7  *      modify it under the terms of the GNU General Public License version
8  *      2 as published by the Free Software Foundation.
9  *
10  * Support to set flow control line levels using TIOCMGET and TIOCMSET
11  * thanks to Karl Hiramoto karl@hiramoto.org. RTSCTS hardware flow
12  * control thanks to Munir Nassar nassarmu@real-time.com
13  *
14  */
15
16 #include <linux/kernel.h>
17 #include <linux/errno.h>
18 #include <linux/slab.h>
19 #include <linux/tty.h>
20 #include <linux/tty_flip.h>
21 #include <linux/module.h>
22 #include <linux/moduleparam.h>
23 #include <linux/usb.h>
24 #include <linux/uaccess.h>
25 #include <linux/usb/serial.h>
26
27 /*
28  * Version Information
29  */
30 #define DRIVER_VERSION "v0.09"
31 #define DRIVER_DESC "Silicon Labs CP210x RS232 serial adaptor driver"
32
33 /*
34  * Function Prototypes
35  */
36 static int cp210x_open(struct tty_struct *, struct usb_serial_port *,
37                                                         struct file *);
38 static void cp210x_cleanup(struct usb_serial_port *);
39 static void cp210x_close(struct usb_serial_port *);
40 static void cp210x_get_termios(struct tty_struct *,
41         struct usb_serial_port *port);
42 static void cp210x_get_termios_port(struct usb_serial_port *port,
43         unsigned int *cflagp, unsigned int *baudp);
44 static void cp210x_set_termios(struct tty_struct *, struct usb_serial_port *,
45                                                         struct ktermios*);
46 static int cp210x_tiocmget(struct tty_struct *, struct file *);
47 static int cp210x_tiocmset(struct tty_struct *, struct file *,
48                 unsigned int, unsigned int);
49 static int cp210x_tiocmset_port(struct usb_serial_port *port, struct file *,
50                 unsigned int, unsigned int);
51 static void cp210x_break_ctl(struct tty_struct *, int);
52 static int cp210x_startup(struct usb_serial *);
53 static void cp210x_disconnect(struct usb_serial *);
54
55 static int debug;
56
57 static struct usb_device_id id_table [] = {
58         { USB_DEVICE(0x0471, 0x066A) }, /* AKTAKOM ACE-1001 cable */
59         { USB_DEVICE(0x0489, 0xE000) }, /* Pirelli Broadband S.p.A, DP-L10 SIP/GSM Mobile */
60         { USB_DEVICE(0x0745, 0x1000) }, /* CipherLab USB CCD Barcode Scanner 1000 */
61         { USB_DEVICE(0x08e6, 0x5501) }, /* Gemalto Prox-PU/CU contactless smartcard reader */
62         { USB_DEVICE(0x08FD, 0x000A) }, /* Digianswer A/S , ZigBee/802.15.4 MAC Device */
63         { USB_DEVICE(0x0FCF, 0x1003) }, /* Dynastream ANT development board */
64         { USB_DEVICE(0x0FCF, 0x1004) }, /* Dynastream ANT2USB */
65         { USB_DEVICE(0x0FCF, 0x1006) }, /* Dynastream ANT development board */
66         { USB_DEVICE(0x10A6, 0xAA26) }, /* Knock-off DCU-11 cable */
67         { USB_DEVICE(0x10AB, 0x10C5) }, /* Siemens MC60 Cable */
68         { USB_DEVICE(0x10B5, 0xAC70) }, /* Nokia CA-42 USB */
69         { USB_DEVICE(0x10C4, 0x0F91) }, /* Vstabi */
70         { USB_DEVICE(0x10C4, 0x1101) }, /* Arkham Technology DS101 Bus Monitor */
71         { USB_DEVICE(0x10C4, 0x1601) }, /* Arkham Technology DS101 Adapter */
72         { USB_DEVICE(0x10C4, 0x800A) }, /* SPORTident BSM7-D-USB main station */
73         { USB_DEVICE(0x10C4, 0x803B) }, /* Pololu USB-serial converter */
74         { USB_DEVICE(0x10C4, 0x8053) }, /* Enfora EDG1228 */
75         { USB_DEVICE(0x10C4, 0x8054) }, /* Enfora GSM2228 */
76         { USB_DEVICE(0x10C4, 0x8066) }, /* Argussoft In-System Programmer */
77         { USB_DEVICE(0x10C4, 0x807A) }, /* Crumb128 board */
78         { USB_DEVICE(0x10C4, 0x80CA) }, /* Degree Controls Inc */
79         { USB_DEVICE(0x10C4, 0x80DD) }, /* Tracient RFID */
80         { USB_DEVICE(0x10C4, 0x80F6) }, /* Suunto sports instrument */
81         { USB_DEVICE(0x10C4, 0x8115) }, /* Arygon NFC/Mifare Reader */
82         { USB_DEVICE(0x10C4, 0x813D) }, /* Burnside Telecom Deskmobile */
83         { USB_DEVICE(0x10C4, 0x813F) }, /* Tams Master Easy Control */
84         { USB_DEVICE(0x10C4, 0x814A) }, /* West Mountain Radio RIGblaster P&P */
85         { USB_DEVICE(0x10C4, 0x814B) }, /* West Mountain Radio RIGtalk */
86         { USB_DEVICE(0x10C4, 0x815E) }, /* Helicomm IP-Link 1220-DVM */
87         { USB_DEVICE(0x10C4, 0x819F) }, /* MJS USB Toslink Switcher */
88         { USB_DEVICE(0x10C4, 0x81A6) }, /* ThinkOptics WavIt */
89         { USB_DEVICE(0x10C4, 0x81AC) }, /* MSD Dash Hawk */
90         { USB_DEVICE(0x10C4, 0x81C8) }, /* Lipowsky Industrie Elektronik GmbH, Baby-JTAG */
91         { USB_DEVICE(0x10C4, 0x81E2) }, /* Lipowsky Industrie Elektronik GmbH, Baby-LIN */
92         { USB_DEVICE(0x10C4, 0x81E7) }, /* Aerocomm Radio */
93         { USB_DEVICE(0x10C4, 0x81F2) }, /* C1007 HF band RFID controller */
94         { USB_DEVICE(0x10C4, 0x8218) }, /* Lipowsky Industrie Elektronik GmbH, HARP-1 */
95         { USB_DEVICE(0x10C4, 0x822B) }, /* Modem EDGE(GSM) Comander 2 */
96         { USB_DEVICE(0x10C4, 0x826B) }, /* Cygnal Integrated Products, Inc., Fasttrax GPS demostration module */
97         { USB_DEVICE(0x10c4, 0x8293) }, /* Telegesys ETRX2USB */
98         { USB_DEVICE(0x10C4, 0x82F9) }, /* Procyon AVS */
99         { USB_DEVICE(0x10C4, 0x8341) }, /* Siemens MC35PU GPRS Modem */
100         { USB_DEVICE(0x10C4, 0x8382) }, /* Cygnal Integrated Products, Inc. */
101         { USB_DEVICE(0x10C4, 0x83A8) }, /* Amber Wireless AMB2560 */
102         { USB_DEVICE(0x10C4, 0x8411) }, /* Kyocera GPS Module */
103         { USB_DEVICE(0x10C4, 0x846E) }, /* BEI USB Sensor Interface (VCP) */
104         { USB_DEVICE(0x10C4, 0xEA60) }, /* Silicon Labs factory default */
105         { USB_DEVICE(0x10C4, 0xEA61) }, /* Silicon Labs factory default */
106         { USB_DEVICE(0x10C4, 0xF001) }, /* Elan Digital Systems USBscope50 */
107         { USB_DEVICE(0x10C4, 0xF002) }, /* Elan Digital Systems USBwave12 */
108         { USB_DEVICE(0x10C4, 0xF003) }, /* Elan Digital Systems USBpulse100 */
109         { USB_DEVICE(0x10C4, 0xF004) }, /* Elan Digital Systems USBcount50 */
110         { USB_DEVICE(0x10C5, 0xEA61) }, /* Silicon Labs MobiData GPRS USB Modem */
111         { USB_DEVICE(0x10CE, 0xEA6A) }, /* Silicon Labs MobiData GPRS USB Modem 100EU */
112         { USB_DEVICE(0x13AD, 0x9999) }, /* Baltech card reader */
113         { USB_DEVICE(0x1555, 0x0004) }, /* Owen AC4 USB-RS485 Converter */
114         { USB_DEVICE(0x166A, 0x0303) }, /* Clipsal 5500PCU C-Bus USB interface */
115         { USB_DEVICE(0x16D6, 0x0001) }, /* Jablotron serial interface */
116         { USB_DEVICE(0x18EF, 0xE00F) }, /* ELV USB-I2C-Interface */
117         { } /* Terminating Entry */
118 };
119
120 MODULE_DEVICE_TABLE(usb, id_table);
121
122 static struct usb_driver cp210x_driver = {
123         .name           = "cp210x",
124         .probe          = usb_serial_probe,
125         .disconnect     = usb_serial_disconnect,
126         .id_table       = id_table,
127         .no_dynamic_id  =       1,
128 };
129
130 static struct usb_serial_driver cp210x_device = {
131         .driver = {
132                 .owner =        THIS_MODULE,
133                 .name =         "cp210x",
134         },
135         .usb_driver             = &cp210x_driver,
136         .id_table               = id_table,
137         .num_ports              = 1,
138         .open                   = cp210x_open,
139         .close                  = cp210x_close,
140         .break_ctl              = cp210x_break_ctl,
141         .set_termios            = cp210x_set_termios,
142         .tiocmget               = cp210x_tiocmget,
143         .tiocmset               = cp210x_tiocmset,
144         .attach                 = cp210x_startup,
145         .disconnect             = cp210x_disconnect,
146 };
147
148 /* Config request types */
149 #define REQTYPE_HOST_TO_DEVICE  0x41
150 #define REQTYPE_DEVICE_TO_HOST  0xc1
151
152 /* Config request codes */
153 #define CP210X_IFC_ENABLE       0x00
154 #define CP210X_SET_BAUDDIV      0x01
155 #define CP210X_GET_BAUDDIV      0x02
156 #define CP210X_SET_LINE_CTL     0x03
157 #define CP210X_GET_LINE_CTL     0x04
158 #define CP210X_SET_BREAK        0x05
159 #define CP210X_IMM_CHAR         0x06
160 #define CP210X_SET_MHS          0x07
161 #define CP210X_GET_MDMSTS       0x08
162 #define CP210X_SET_XON          0x09
163 #define CP210X_SET_XOFF         0x0A
164 #define CP210X_SET_EVENTMASK    0x0B
165 #define CP210X_GET_EVENTMASK    0x0C
166 #define CP210X_SET_CHAR         0x0D
167 #define CP210X_GET_CHARS        0x0E
168 #define CP210X_GET_PROPS        0x0F
169 #define CP210X_GET_COMM_STATUS  0x10
170 #define CP210X_RESET            0x11
171 #define CP210X_PURGE            0x12
172 #define CP210X_SET_FLOW         0x13
173 #define CP210X_GET_FLOW         0x14
174 #define CP210X_EMBED_EVENTS     0x15
175 #define CP210X_GET_EVENTSTATE   0x16
176 #define CP210X_SET_CHARS        0x19
177
178 /* CP210X_IFC_ENABLE */
179 #define UART_ENABLE             0x0001
180 #define UART_DISABLE            0x0000
181
182 /* CP210X_(SET|GET)_BAUDDIV */
183 #define BAUD_RATE_GEN_FREQ      0x384000
184
185 /* CP210X_(SET|GET)_LINE_CTL */
186 #define BITS_DATA_MASK          0X0f00
187 #define BITS_DATA_5             0X0500
188 #define BITS_DATA_6             0X0600
189 #define BITS_DATA_7             0X0700
190 #define BITS_DATA_8             0X0800
191 #define BITS_DATA_9             0X0900
192
193 #define BITS_PARITY_MASK        0x00f0
194 #define BITS_PARITY_NONE        0x0000
195 #define BITS_PARITY_ODD         0x0010
196 #define BITS_PARITY_EVEN        0x0020
197 #define BITS_PARITY_MARK        0x0030
198 #define BITS_PARITY_SPACE       0x0040
199
200 #define BITS_STOP_MASK          0x000f
201 #define BITS_STOP_1             0x0000
202 #define BITS_STOP_1_5           0x0001
203 #define BITS_STOP_2             0x0002
204
205 /* CP210X_SET_BREAK */
206 #define BREAK_ON                0x0000
207 #define BREAK_OFF               0x0001
208
209 /* CP210X_(SET_MHS|GET_MDMSTS) */
210 #define CONTROL_DTR             0x0001
211 #define CONTROL_RTS             0x0002
212 #define CONTROL_CTS             0x0010
213 #define CONTROL_DSR             0x0020
214 #define CONTROL_RING            0x0040
215 #define CONTROL_DCD             0x0080
216 #define CONTROL_WRITE_DTR       0x0100
217 #define CONTROL_WRITE_RTS       0x0200
218
219 /*
220  * cp210x_get_config
221  * Reads from the CP210x configuration registers
222  * 'size' is specified in bytes.
223  * 'data' is a pointer to a pre-allocated array of integers large
224  * enough to hold 'size' bytes (with 4 bytes to each integer)
225  */
226 static int cp210x_get_config(struct usb_serial_port *port, u8 request,
227                 unsigned int *data, int size)
228 {
229         struct usb_serial *serial = port->serial;
230         __le32 *buf;
231         int result, i, length;
232
233         /* Number of integers required to contain the array */
234         length = (((size - 1) | 3) + 1)/4;
235
236         buf = kcalloc(length, sizeof(__le32), GFP_KERNEL);
237         if (!buf) {
238                 dev_err(&port->dev, "%s - out of memory.\n", __func__);
239                 return -ENOMEM;
240         }
241
242         /* Issue the request, attempting to read 'size' bytes */
243         result = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
244                                 request, REQTYPE_DEVICE_TO_HOST, 0x0000,
245                                 0, buf, size, 300);
246
247         /* Convert data into an array of integers */
248         for (i = 0; i < length; i++)
249                 data[i] = le32_to_cpu(buf[i]);
250
251         kfree(buf);
252
253         if (result != size) {
254                 dbg("%s - Unable to send config request, "
255                                 "request=0x%x size=%d result=%d\n",
256                                 __func__, request, size, result);
257                 return -EPROTO;
258         }
259
260         return 0;
261 }
262
263 /*
264  * cp210x_set_config
265  * Writes to the CP210x configuration registers
266  * Values less than 16 bits wide are sent directly
267  * 'size' is specified in bytes.
268  */
269 static int cp210x_set_config(struct usb_serial_port *port, u8 request,
270                 unsigned int *data, int size)
271 {
272         struct usb_serial *serial = port->serial;
273         __le32 *buf;
274         int result, i, length;
275
276         /* Number of integers required to contain the array */
277         length = (((size - 1) | 3) + 1)/4;
278
279         buf = kmalloc(length * sizeof(__le32), GFP_KERNEL);
280         if (!buf) {
281                 dev_err(&port->dev, "%s - out of memory.\n",
282                                 __func__);
283                 return -ENOMEM;
284         }
285
286         /* Array of integers into bytes */
287         for (i = 0; i < length; i++)
288                 buf[i] = cpu_to_le32(data[i]);
289
290         if (size > 2) {
291                 result = usb_control_msg(serial->dev,
292                                 usb_sndctrlpipe(serial->dev, 0),
293                                 request, REQTYPE_HOST_TO_DEVICE, 0x0000,
294                                 0, buf, size, 300);
295         } else {
296                 result = usb_control_msg(serial->dev,
297                                 usb_sndctrlpipe(serial->dev, 0),
298                                 request, REQTYPE_HOST_TO_DEVICE, data[0],
299                                 0, NULL, 0, 300);
300         }
301
302         kfree(buf);
303
304         if ((size > 2 && result != size) || result < 0) {
305                 dbg("%s - Unable to send request, "
306                                 "request=0x%x size=%d result=%d\n",
307                                 __func__, request, size, result);
308                 return -EPROTO;
309         }
310
311         /* Single data value */
312         result = usb_control_msg(serial->dev,
313                         usb_sndctrlpipe(serial->dev, 0),
314                         request, REQTYPE_HOST_TO_DEVICE, data[0],
315                         0, NULL, 0, 300);
316         return 0;
317 }
318
319 /*
320  * cp210x_set_config_single
321  * Convenience function for calling cp210x_set_config on single data values
322  * without requiring an integer pointer
323  */
324 static inline int cp210x_set_config_single(struct usb_serial_port *port,
325                 u8 request, unsigned int data)
326 {
327         return cp210x_set_config(port, request, &data, 2);
328 }
329
330 /*
331  * cp210x_quantise_baudrate
332  * Quantises the baud rate as per AN205 Table 1
333  */
334 static unsigned int cp210x_quantise_baudrate(unsigned int baud) {
335         if      (baud <= 56)       baud = 0;
336         else if (baud <= 300)      baud = 300;
337         else if (baud <= 600)      baud = 600;
338         else if (baud <= 1200)     baud = 1200;
339         else if (baud <= 1800)     baud = 1800;
340         else if (baud <= 2400)     baud = 2400;
341         else if (baud <= 4000)     baud = 4000;
342         else if (baud <= 4803)     baud = 4800;
343         else if (baud <= 7207)     baud = 7200;
344         else if (baud <= 9612)     baud = 9600;
345         else if (baud <= 14428)    baud = 14400;
346         else if (baud <= 16062)    baud = 16000;
347         else if (baud <= 19250)    baud = 19200;
348         else if (baud <= 28912)    baud = 28800;
349         else if (baud <= 38601)    baud = 38400;
350         else if (baud <= 51558)    baud = 51200;
351         else if (baud <= 56280)    baud = 56000;
352         else if (baud <= 58053)    baud = 57600;
353         else if (baud <= 64111)    baud = 64000;
354         else if (baud <= 77608)    baud = 76800;
355         else if (baud <= 117028)   baud = 115200;
356         else if (baud <= 129347)   baud = 128000;
357         else if (baud <= 156868)   baud = 153600;
358         else if (baud <= 237832)   baud = 230400;
359         else if (baud <= 254234)   baud = 250000;
360         else if (baud <= 273066)   baud = 256000;
361         else if (baud <= 491520)   baud = 460800;
362         else if (baud <= 567138)   baud = 500000;
363         else if (baud <= 670254)   baud = 576000;
364         else if (baud <= 1053257)  baud = 921600;
365         else if (baud <= 1474560)  baud = 1228800;
366         else if (baud <= 2457600)  baud = 1843200;
367         else                       baud = 3686400;
368         return baud;
369 }
370
371 static int cp210x_open(struct tty_struct *tty, struct usb_serial_port *port,
372                                 struct file *filp)
373 {
374         struct usb_serial *serial = port->serial;
375         int result;
376
377         dbg("%s - port %d", __func__, port->number);
378
379         if (cp210x_set_config_single(port, CP210X_IFC_ENABLE, UART_ENABLE)) {
380                 dev_err(&port->dev, "%s - Unable to enable UART\n",
381                                 __func__);
382                 return -EPROTO;
383         }
384
385         /* Start reading from the device */
386         usb_fill_bulk_urb(port->read_urb, serial->dev,
387                         usb_rcvbulkpipe(serial->dev,
388                         port->bulk_in_endpointAddress),
389                         port->read_urb->transfer_buffer,
390                         port->read_urb->transfer_buffer_length,
391                         serial->type->read_bulk_callback,
392                         port);
393         result = usb_submit_urb(port->read_urb, GFP_KERNEL);
394         if (result) {
395                 dev_err(&port->dev, "%s - failed resubmitting read urb, "
396                                 "error %d\n", __func__, result);
397                 return result;
398         }
399
400         /* Configure the termios structure */
401         cp210x_get_termios(tty, port);
402
403         /* Set the DTR and RTS pins low */
404         cp210x_tiocmset_port(tty ? (struct usb_serial_port *) tty->driver_data
405                         : port,
406                 NULL, TIOCM_DTR | TIOCM_RTS, 0);
407
408         return 0;
409 }
410
411 static void cp210x_cleanup(struct usb_serial_port *port)
412 {
413         struct usb_serial *serial = port->serial;
414
415         dbg("%s - port %d", __func__, port->number);
416
417         if (serial->dev) {
418                 /* shutdown any bulk reads that might be going on */
419                 if (serial->num_bulk_out)
420                         usb_kill_urb(port->write_urb);
421                 if (serial->num_bulk_in)
422                         usb_kill_urb(port->read_urb);
423         }
424 }
425
426 static void cp210x_close(struct usb_serial_port *port)
427 {
428         dbg("%s - port %d", __func__, port->number);
429
430         /* shutdown our urbs */
431         dbg("%s - shutting down urbs", __func__);
432         usb_kill_urb(port->write_urb);
433         usb_kill_urb(port->read_urb);
434
435         mutex_lock(&port->serial->disc_mutex);
436         if (!port->serial->disconnected)
437                 cp210x_set_config_single(port, CP210X_IFC_ENABLE, UART_DISABLE);
438         mutex_unlock(&port->serial->disc_mutex);
439 }
440
441 /*
442  * cp210x_get_termios
443  * Reads the baud rate, data bits, parity, stop bits and flow control mode
444  * from the device, corrects any unsupported values, and configures the
445  * termios structure to reflect the state of the device
446  */
447 static void cp210x_get_termios(struct tty_struct *tty,
448         struct usb_serial_port *port)
449 {
450         unsigned int baud;
451
452         if (tty) {
453                 cp210x_get_termios_port(tty->driver_data,
454                         &tty->termios->c_cflag, &baud);
455                 tty_encode_baud_rate(tty, baud, baud);
456         }
457
458         else {
459                 unsigned int cflag;
460                 cflag = 0;
461                 cp210x_get_termios_port(port, &cflag, &baud);
462         }
463 }
464
465 /*
466  * cp210x_get_termios_port
467  * This is the heart of cp210x_get_termios which always uses a &usb_serial_port.
468  */
469 static void cp210x_get_termios_port(struct usb_serial_port *port,
470         unsigned int *cflagp, unsigned int *baudp)
471 {
472         unsigned int cflag, modem_ctl[4];
473         unsigned int baud;
474         unsigned int bits;
475
476         dbg("%s - port %d", __func__, port->number);
477
478         cp210x_get_config(port, CP210X_GET_BAUDDIV, &baud, 2);
479         /* Convert to baudrate */
480         if (baud)
481                 baud = cp210x_quantise_baudrate((BAUD_RATE_GEN_FREQ + baud/2)/ baud);
482
483         dbg("%s - baud rate = %d", __func__, baud);
484         *baudp = baud;
485
486         cflag = *cflagp;
487
488         cp210x_get_config(port, CP210X_GET_LINE_CTL, &bits, 2);
489         cflag &= ~CSIZE;
490         switch (bits & BITS_DATA_MASK) {
491         case BITS_DATA_5:
492                 dbg("%s - data bits = 5", __func__);
493                 cflag |= CS5;
494                 break;
495         case BITS_DATA_6:
496                 dbg("%s - data bits = 6", __func__);
497                 cflag |= CS6;
498                 break;
499         case BITS_DATA_7:
500                 dbg("%s - data bits = 7", __func__);
501                 cflag |= CS7;
502                 break;
503         case BITS_DATA_8:
504                 dbg("%s - data bits = 8", __func__);
505                 cflag |= CS8;
506                 break;
507         case BITS_DATA_9:
508                 dbg("%s - data bits = 9 (not supported, using 8 data bits)",
509                                                                 __func__);
510                 cflag |= CS8;
511                 bits &= ~BITS_DATA_MASK;
512                 bits |= BITS_DATA_8;
513                 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2);
514                 break;
515         default:
516                 dbg("%s - Unknown number of data bits, using 8", __func__);
517                 cflag |= CS8;
518                 bits &= ~BITS_DATA_MASK;
519                 bits |= BITS_DATA_8;
520                 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2);
521                 break;
522         }
523
524         switch (bits & BITS_PARITY_MASK) {
525         case BITS_PARITY_NONE:
526                 dbg("%s - parity = NONE", __func__);
527                 cflag &= ~PARENB;
528                 break;
529         case BITS_PARITY_ODD:
530                 dbg("%s - parity = ODD", __func__);
531                 cflag |= (PARENB|PARODD);
532                 break;
533         case BITS_PARITY_EVEN:
534                 dbg("%s - parity = EVEN", __func__);
535                 cflag &= ~PARODD;
536                 cflag |= PARENB;
537                 break;
538         case BITS_PARITY_MARK:
539                 dbg("%s - parity = MARK (not supported, disabling parity)",
540                                 __func__);
541                 cflag &= ~PARENB;
542                 bits &= ~BITS_PARITY_MASK;
543                 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2);
544                 break;
545         case BITS_PARITY_SPACE:
546                 dbg("%s - parity = SPACE (not supported, disabling parity)",
547                                 __func__);
548                 cflag &= ~PARENB;
549                 bits &= ~BITS_PARITY_MASK;
550                 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2);
551                 break;
552         default:
553                 dbg("%s - Unknown parity mode, disabling parity", __func__);
554                 cflag &= ~PARENB;
555                 bits &= ~BITS_PARITY_MASK;
556                 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2);
557                 break;
558         }
559
560         cflag &= ~CSTOPB;
561         switch (bits & BITS_STOP_MASK) {
562         case BITS_STOP_1:
563                 dbg("%s - stop bits = 1", __func__);
564                 break;
565         case BITS_STOP_1_5:
566                 dbg("%s - stop bits = 1.5 (not supported, using 1 stop bit)",
567                                                                 __func__);
568                 bits &= ~BITS_STOP_MASK;
569                 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2);
570                 break;
571         case BITS_STOP_2:
572                 dbg("%s - stop bits = 2", __func__);
573                 cflag |= CSTOPB;
574                 break;
575         default:
576                 dbg("%s - Unknown number of stop bits, using 1 stop bit",
577                                                                 __func__);
578                 bits &= ~BITS_STOP_MASK;
579                 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2);
580                 break;
581         }
582
583         cp210x_get_config(port, CP210X_GET_FLOW, modem_ctl, 16);
584         if (modem_ctl[0] & 0x0008) {
585                 dbg("%s - flow control = CRTSCTS", __func__);
586                 cflag |= CRTSCTS;
587         } else {
588                 dbg("%s - flow control = NONE", __func__);
589                 cflag &= ~CRTSCTS;
590         }
591
592         *cflagp = cflag;
593 }
594
595 static void cp210x_set_termios(struct tty_struct *tty,
596                 struct usb_serial_port *port, struct ktermios *old_termios)
597 {
598         unsigned int cflag, old_cflag;
599         unsigned int baud = 0, bits;
600         unsigned int modem_ctl[4];
601
602         dbg("%s - port %d", __func__, port->number);
603
604         if (!tty)
605                 return;
606
607         tty->termios->c_cflag &= ~CMSPAR;
608         cflag = tty->termios->c_cflag;
609         old_cflag = old_termios->c_cflag;
610         baud = cp210x_quantise_baudrate(tty_get_baud_rate(tty));
611
612         /* If the baud rate is to be updated*/
613         if (baud != tty_termios_baud_rate(old_termios) && baud != 0) {
614                 dbg("%s - Setting baud rate to %d baud", __func__,
615                                 baud);
616                 if (cp210x_set_config_single(port, CP210X_SET_BAUDDIV,
617                                         ((BAUD_RATE_GEN_FREQ + baud/2) / baud))) {
618                         dbg("Baud rate requested not supported by device\n");
619                         baud = tty_termios_baud_rate(old_termios);
620                 }
621         }
622         /* Report back the resulting baud rate */
623         tty_encode_baud_rate(tty, baud, baud);
624
625         /* If the number of data bits is to be updated */
626         if ((cflag & CSIZE) != (old_cflag & CSIZE)) {
627                 cp210x_get_config(port, CP210X_GET_LINE_CTL, &bits, 2);
628                 bits &= ~BITS_DATA_MASK;
629                 switch (cflag & CSIZE) {
630                 case CS5:
631                         bits |= BITS_DATA_5;
632                         dbg("%s - data bits = 5", __func__);
633                         break;
634                 case CS6:
635                         bits |= BITS_DATA_6;
636                         dbg("%s - data bits = 6", __func__);
637                         break;
638                 case CS7:
639                         bits |= BITS_DATA_7;
640                         dbg("%s - data bits = 7", __func__);
641                         break;
642                 case CS8:
643                         bits |= BITS_DATA_8;
644                         dbg("%s - data bits = 8", __func__);
645                         break;
646                 /*case CS9:
647                         bits |= BITS_DATA_9;
648                         dbg("%s - data bits = 9", __func__);
649                         break;*/
650                 default:
651                         dbg("cp210x driver does not "
652                                         "support the number of bits requested,"
653                                         " using 8 bit mode\n");
654                                 bits |= BITS_DATA_8;
655                                 break;
656                 }
657                 if (cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2))
658                         dbg("Number of data bits requested "
659                                         "not supported by device\n");
660         }
661
662         if ((cflag & (PARENB|PARODD)) != (old_cflag & (PARENB|PARODD))) {
663                 cp210x_get_config(port, CP210X_GET_LINE_CTL, &bits, 2);
664                 bits &= ~BITS_PARITY_MASK;
665                 if (cflag & PARENB) {
666                         if (cflag & PARODD) {
667                                 bits |= BITS_PARITY_ODD;
668                                 dbg("%s - parity = ODD", __func__);
669                         } else {
670                                 bits |= BITS_PARITY_EVEN;
671                                 dbg("%s - parity = EVEN", __func__);
672                         }
673                 }
674                 if (cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2))
675                         dbg("Parity mode not supported "
676                                         "by device\n");
677         }
678
679         if ((cflag & CSTOPB) != (old_cflag & CSTOPB)) {
680                 cp210x_get_config(port, CP210X_GET_LINE_CTL, &bits, 2);
681                 bits &= ~BITS_STOP_MASK;
682                 if (cflag & CSTOPB) {
683                         bits |= BITS_STOP_2;
684                         dbg("%s - stop bits = 2", __func__);
685                 } else {
686                         bits |= BITS_STOP_1;
687                         dbg("%s - stop bits = 1", __func__);
688                 }
689                 if (cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2))
690                         dbg("Number of stop bits requested "
691                                         "not supported by device\n");
692         }
693
694         if ((cflag & CRTSCTS) != (old_cflag & CRTSCTS)) {
695                 cp210x_get_config(port, CP210X_GET_FLOW, modem_ctl, 16);
696                 dbg("%s - read modem controls = 0x%.4x 0x%.4x 0x%.4x 0x%.4x",
697                                 __func__, modem_ctl[0], modem_ctl[1],
698                                 modem_ctl[2], modem_ctl[3]);
699
700                 if (cflag & CRTSCTS) {
701                         modem_ctl[0] &= ~0x7B;
702                         modem_ctl[0] |= 0x09;
703                         modem_ctl[1] = 0x80;
704                         dbg("%s - flow control = CRTSCTS", __func__);
705                 } else {
706                         modem_ctl[0] &= ~0x7B;
707                         modem_ctl[0] |= 0x01;
708                         modem_ctl[1] |= 0x40;
709                         dbg("%s - flow control = NONE", __func__);
710                 }
711
712                 dbg("%s - write modem controls = 0x%.4x 0x%.4x 0x%.4x 0x%.4x",
713                                 __func__, modem_ctl[0], modem_ctl[1],
714                                 modem_ctl[2], modem_ctl[3]);
715                 cp210x_set_config(port, CP210X_SET_FLOW, modem_ctl, 16);
716         }
717
718 }
719
720 static int cp210x_tiocmset (struct tty_struct *tty, struct file *file,
721                 unsigned int set, unsigned int clear)
722 {
723         struct usb_serial_port *port = tty->driver_data;
724         return cp210x_tiocmset_port(port, file, set, clear);
725 }
726
727 static int cp210x_tiocmset_port(struct usb_serial_port *port, struct file *file,
728                 unsigned int set, unsigned int clear)
729 {
730         unsigned int control = 0;
731
732         dbg("%s - port %d", __func__, port->number);
733
734         if (set & TIOCM_RTS) {
735                 control |= CONTROL_RTS;
736                 control |= CONTROL_WRITE_RTS;
737         }
738         if (set & TIOCM_DTR) {
739                 control |= CONTROL_DTR;
740                 control |= CONTROL_WRITE_DTR;
741         }
742         if (clear & TIOCM_RTS) {
743                 control &= ~CONTROL_RTS;
744                 control |= CONTROL_WRITE_RTS;
745         }
746         if (clear & TIOCM_DTR) {
747                 control &= ~CONTROL_DTR;
748                 control |= CONTROL_WRITE_DTR;
749         }
750
751         dbg("%s - control = 0x%.4x", __func__, control);
752
753         return cp210x_set_config(port, CP210X_SET_MHS, &control, 2);
754 }
755
756 static int cp210x_tiocmget (struct tty_struct *tty, struct file *file)
757 {
758         struct usb_serial_port *port = tty->driver_data;
759         unsigned int control;
760         int result;
761
762         dbg("%s - port %d", __func__, port->number);
763
764         cp210x_get_config(port, CP210X_GET_MDMSTS, &control, 1);
765
766         result = ((control & CONTROL_DTR) ? TIOCM_DTR : 0)
767                 |((control & CONTROL_RTS) ? TIOCM_RTS : 0)
768                 |((control & CONTROL_CTS) ? TIOCM_CTS : 0)
769                 |((control & CONTROL_DSR) ? TIOCM_DSR : 0)
770                 |((control & CONTROL_RING)? TIOCM_RI  : 0)
771                 |((control & CONTROL_DCD) ? TIOCM_CD  : 0);
772
773         dbg("%s - control = 0x%.2x", __func__, control);
774
775         return result;
776 }
777
778 static void cp210x_break_ctl (struct tty_struct *tty, int break_state)
779 {
780         struct usb_serial_port *port = tty->driver_data;
781         unsigned int state;
782
783         dbg("%s - port %d", __func__, port->number);
784         if (break_state == 0)
785                 state = BREAK_OFF;
786         else
787                 state = BREAK_ON;
788         dbg("%s - turning break %s", __func__,
789                         state == BREAK_OFF ? "off" : "on");
790         cp210x_set_config(port, CP210X_SET_BREAK, &state, 2);
791 }
792
793 static int cp210x_startup(struct usb_serial *serial)
794 {
795         /* cp210x buffers behave strangely unless device is reset */
796         usb_reset_device(serial->dev);
797         return 0;
798 }
799
800 static void cp210x_disconnect(struct usb_serial *serial)
801 {
802         int i;
803
804         dbg("%s", __func__);
805
806         /* Stop reads and writes on all ports */
807         for (i = 0; i < serial->num_ports; ++i)
808                 cp210x_cleanup(serial->port[i]);
809 }
810
811 static int __init cp210x_init(void)
812 {
813         int retval;
814
815         retval = usb_serial_register(&cp210x_device);
816         if (retval)
817                 return retval; /* Failed to register */
818
819         retval = usb_register(&cp210x_driver);
820         if (retval) {
821                 /* Failed to register */
822                 usb_serial_deregister(&cp210x_device);
823                 return retval;
824         }
825
826         /* Success */
827         printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_VERSION ":"
828                DRIVER_DESC "\n");
829         return 0;
830 }
831
832 static void __exit cp210x_exit(void)
833 {
834         usb_deregister(&cp210x_driver);
835         usb_serial_deregister(&cp210x_device);
836 }
837
838 module_init(cp210x_init);
839 module_exit(cp210x_exit);
840
841 MODULE_DESCRIPTION(DRIVER_DESC);
842 MODULE_VERSION(DRIVER_VERSION);
843 MODULE_LICENSE("GPL");
844
845 module_param(debug, bool, S_IRUGO | S_IWUSR);
846 MODULE_PARM_DESC(debug, "Enable verbose debugging messages");