USB: cp210x: Add Renesas RX-Stick device ID
[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 *tty, struct usb_serial_port *);
37 static void cp210x_close(struct usb_serial_port *);
38 static void cp210x_get_termios(struct tty_struct *,
39         struct usb_serial_port *port);
40 static void cp210x_get_termios_port(struct usb_serial_port *port,
41         unsigned int *cflagp, unsigned int *baudp);
42 static void cp210x_set_termios(struct tty_struct *, struct usb_serial_port *,
43                                                         struct ktermios*);
44 static int cp210x_tiocmget(struct tty_struct *, struct file *);
45 static int cp210x_tiocmset(struct tty_struct *, struct file *,
46                 unsigned int, unsigned int);
47 static int cp210x_tiocmset_port(struct usb_serial_port *port, struct file *,
48                 unsigned int, unsigned int);
49 static void cp210x_break_ctl(struct tty_struct *, int);
50 static int cp210x_startup(struct usb_serial *);
51 static void cp210x_dtr_rts(struct usb_serial_port *p, int on);
52 static int cp210x_carrier_raised(struct usb_serial_port *p);
53
54 static int debug;
55
56 static const struct usb_device_id id_table[] = {
57         { USB_DEVICE(0x045B, 0x0053) }, /* Renesas RX610 RX-Stick */
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(0x0489, 0xE003) }, /* Pirelli Broadband S.p.A, DP-L10 SIP/GSM Mobile */
61         { USB_DEVICE(0x0745, 0x1000) }, /* CipherLab USB CCD Barcode Scanner 1000 */
62         { USB_DEVICE(0x08e6, 0x5501) }, /* Gemalto Prox-PU/CU contactless smartcard reader */
63         { USB_DEVICE(0x08FD, 0x000A) }, /* Digianswer A/S , ZigBee/802.15.4 MAC Device */
64         { USB_DEVICE(0x0BED, 0x1100) }, /* MEI (TM) Cashflow-SC Bill/Voucher Acceptor */
65         { USB_DEVICE(0x0BED, 0x1101) }, /* MEI series 2000 Combo Acceptor */
66         { USB_DEVICE(0x0FCF, 0x1003) }, /* Dynastream ANT development board */
67         { USB_DEVICE(0x0FCF, 0x1004) }, /* Dynastream ANT2USB */
68         { USB_DEVICE(0x0FCF, 0x1006) }, /* Dynastream ANT development board */
69         { USB_DEVICE(0x10A6, 0xAA26) }, /* Knock-off DCU-11 cable */
70         { USB_DEVICE(0x10AB, 0x10C5) }, /* Siemens MC60 Cable */
71         { USB_DEVICE(0x10B5, 0xAC70) }, /* Nokia CA-42 USB */
72         { USB_DEVICE(0x10C4, 0x0F91) }, /* Vstabi */
73         { USB_DEVICE(0x10C4, 0x1101) }, /* Arkham Technology DS101 Bus Monitor */
74         { USB_DEVICE(0x10C4, 0x1601) }, /* Arkham Technology DS101 Adapter */
75         { USB_DEVICE(0x10C4, 0x800A) }, /* SPORTident BSM7-D-USB main station */
76         { USB_DEVICE(0x10C4, 0x803B) }, /* Pololu USB-serial converter */
77         { USB_DEVICE(0x10C4, 0x8044) }, /* Cygnal Debug Adapter */
78         { USB_DEVICE(0x10C4, 0x804E) }, /* Software Bisque Paramount ME build-in converter */
79         { USB_DEVICE(0x10C4, 0x8053) }, /* Enfora EDG1228 */
80         { USB_DEVICE(0x10C4, 0x8054) }, /* Enfora GSM2228 */
81         { USB_DEVICE(0x10C4, 0x8066) }, /* Argussoft In-System Programmer */
82         { USB_DEVICE(0x10C4, 0x806F) }, /* IMS USB to RS422 Converter Cable */
83         { USB_DEVICE(0x10C4, 0x807A) }, /* Crumb128 board */
84         { USB_DEVICE(0x10C4, 0x80CA) }, /* Degree Controls Inc */
85         { USB_DEVICE(0x10C4, 0x80DD) }, /* Tracient RFID */
86         { USB_DEVICE(0x10C4, 0x80F6) }, /* Suunto sports instrument */
87         { USB_DEVICE(0x10C4, 0x8115) }, /* Arygon NFC/Mifare Reader */
88         { USB_DEVICE(0x10C4, 0x813D) }, /* Burnside Telecom Deskmobile */
89         { USB_DEVICE(0x10C4, 0x813F) }, /* Tams Master Easy Control */
90         { USB_DEVICE(0x10C4, 0x8149) }, /* West Mountain Radio Computerized Battery Analyzer */
91         { USB_DEVICE(0x10C4, 0x814A) }, /* West Mountain Radio RIGblaster P&P */
92         { USB_DEVICE(0x10C4, 0x814B) }, /* West Mountain Radio RIGtalk */
93         { USB_DEVICE(0x10C4, 0x8156) }, /* B&G H3000 link cable */
94         { USB_DEVICE(0x10C4, 0x815E) }, /* Helicomm IP-Link 1220-DVM */
95         { USB_DEVICE(0x10C4, 0x818B) }, /* AVIT Research USB to TTL */
96         { USB_DEVICE(0x10C4, 0x819F) }, /* MJS USB Toslink Switcher */
97         { USB_DEVICE(0x10C4, 0x81A6) }, /* ThinkOptics WavIt */
98         { USB_DEVICE(0x10C4, 0x81AC) }, /* MSD Dash Hawk */
99         { USB_DEVICE(0x10C4, 0x81AD) }, /* INSYS USB Modem */
100         { USB_DEVICE(0x10C4, 0x81C8) }, /* Lipowsky Industrie Elektronik GmbH, Baby-JTAG */
101         { USB_DEVICE(0x10C4, 0x81E2) }, /* Lipowsky Industrie Elektronik GmbH, Baby-LIN */
102         { USB_DEVICE(0x10C4, 0x81E7) }, /* Aerocomm Radio */
103         { USB_DEVICE(0x10C4, 0x81E8) }, /* Zephyr Bioharness */
104         { USB_DEVICE(0x10C4, 0x81F2) }, /* C1007 HF band RFID controller */
105         { USB_DEVICE(0x10C4, 0x8218) }, /* Lipowsky Industrie Elektronik GmbH, HARP-1 */
106         { USB_DEVICE(0x10C4, 0x822B) }, /* Modem EDGE(GSM) Comander 2 */
107         { USB_DEVICE(0x10C4, 0x826B) }, /* Cygnal Integrated Products, Inc., Fasttrax GPS demostration module */
108         { USB_DEVICE(0x10C4, 0x8293) }, /* Telegesys ETRX2USB */
109         { USB_DEVICE(0x10C4, 0x82F9) }, /* Procyon AVS */
110         { USB_DEVICE(0x10C4, 0x8341) }, /* Siemens MC35PU GPRS Modem */
111         { USB_DEVICE(0x10C4, 0x8382) }, /* Cygnal Integrated Products, Inc. */
112         { USB_DEVICE(0x10C4, 0x83A8) }, /* Amber Wireless AMB2560 */
113         { USB_DEVICE(0x10C4, 0x8411) }, /* Kyocera GPS Module */
114         { USB_DEVICE(0x10C4, 0x846E) }, /* BEI USB Sensor Interface (VCP) */
115         { USB_DEVICE(0x10C4, 0x8477) }, /* Balluff RFID */
116         { USB_DEVICE(0x10C4, 0xEA60) }, /* Silicon Labs factory default */
117         { USB_DEVICE(0x10C4, 0xEA61) }, /* Silicon Labs factory default */
118         { USB_DEVICE(0x10C4, 0xEA71) }, /* Infinity GPS-MIC-1 Radio Monophone */
119         { USB_DEVICE(0x10C4, 0xF001) }, /* Elan Digital Systems USBscope50 */
120         { USB_DEVICE(0x10C4, 0xF002) }, /* Elan Digital Systems USBwave12 */
121         { USB_DEVICE(0x10C4, 0xF003) }, /* Elan Digital Systems USBpulse100 */
122         { USB_DEVICE(0x10C4, 0xF004) }, /* Elan Digital Systems USBcount50 */
123         { USB_DEVICE(0x10C5, 0xEA61) }, /* Silicon Labs MobiData GPRS USB Modem */
124         { USB_DEVICE(0x10CE, 0xEA6A) }, /* Silicon Labs MobiData GPRS USB Modem 100EU */
125         { USB_DEVICE(0x13AD, 0x9999) }, /* Baltech card reader */
126         { USB_DEVICE(0x1555, 0x0004) }, /* Owen AC4 USB-RS485 Converter */
127         { USB_DEVICE(0x166A, 0x0303) }, /* Clipsal 5500PCU C-Bus USB interface */
128         { USB_DEVICE(0x16D6, 0x0001) }, /* Jablotron serial interface */
129         { USB_DEVICE(0x16DC, 0x0010) }, /* W-IE-NE-R Plein & Baus GmbH PL512 Power Supply */
130         { USB_DEVICE(0x16DC, 0x0011) }, /* W-IE-NE-R Plein & Baus GmbH RCM Remote Control for MARATON Power Supply */
131         { USB_DEVICE(0x16DC, 0x0012) }, /* W-IE-NE-R Plein & Baus GmbH MPOD Multi Channel Power Supply */
132         { USB_DEVICE(0x16DC, 0x0015) }, /* W-IE-NE-R Plein & Baus GmbH CML Control, Monitoring and Data Logger */
133         { USB_DEVICE(0x17F4, 0xAAAA) }, /* Wavesense Jazz blood glucose meter */
134         { USB_DEVICE(0x1843, 0x0200) }, /* Vaisala USB Instrument Cable */
135         { USB_DEVICE(0x18EF, 0xE00F) }, /* ELV USB-I2C-Interface */
136         { USB_DEVICE(0x413C, 0x9500) }, /* DW700 GPS USB interface */
137         { } /* Terminating Entry */
138 };
139
140 MODULE_DEVICE_TABLE(usb, id_table);
141
142 static struct usb_driver cp210x_driver = {
143         .name           = "cp210x",
144         .probe          = usb_serial_probe,
145         .disconnect     = usb_serial_disconnect,
146         .id_table       = id_table,
147         .no_dynamic_id  =       1,
148 };
149
150 static struct usb_serial_driver cp210x_device = {
151         .driver = {
152                 .owner =        THIS_MODULE,
153                 .name =         "cp210x",
154         },
155         .usb_driver             = &cp210x_driver,
156         .id_table               = id_table,
157         .num_ports              = 1,
158         .bulk_in_size           = 256,
159         .bulk_out_size          = 256,
160         .open                   = cp210x_open,
161         .close                  = cp210x_close,
162         .break_ctl              = cp210x_break_ctl,
163         .set_termios            = cp210x_set_termios,
164         .tiocmget               = cp210x_tiocmget,
165         .tiocmset               = cp210x_tiocmset,
166         .attach                 = cp210x_startup,
167         .dtr_rts                = cp210x_dtr_rts,
168         .carrier_raised         = cp210x_carrier_raised
169 };
170
171 /* Config request types */
172 #define REQTYPE_HOST_TO_DEVICE  0x41
173 #define REQTYPE_DEVICE_TO_HOST  0xc1
174
175 /* Config request codes */
176 #define CP210X_IFC_ENABLE       0x00
177 #define CP210X_SET_BAUDDIV      0x01
178 #define CP210X_GET_BAUDDIV      0x02
179 #define CP210X_SET_LINE_CTL     0x03
180 #define CP210X_GET_LINE_CTL     0x04
181 #define CP210X_SET_BREAK        0x05
182 #define CP210X_IMM_CHAR         0x06
183 #define CP210X_SET_MHS          0x07
184 #define CP210X_GET_MDMSTS       0x08
185 #define CP210X_SET_XON          0x09
186 #define CP210X_SET_XOFF         0x0A
187 #define CP210X_SET_EVENTMASK    0x0B
188 #define CP210X_GET_EVENTMASK    0x0C
189 #define CP210X_SET_CHAR         0x0D
190 #define CP210X_GET_CHARS        0x0E
191 #define CP210X_GET_PROPS        0x0F
192 #define CP210X_GET_COMM_STATUS  0x10
193 #define CP210X_RESET            0x11
194 #define CP210X_PURGE            0x12
195 #define CP210X_SET_FLOW         0x13
196 #define CP210X_GET_FLOW         0x14
197 #define CP210X_EMBED_EVENTS     0x15
198 #define CP210X_GET_EVENTSTATE   0x16
199 #define CP210X_SET_CHARS        0x19
200
201 /* CP210X_IFC_ENABLE */
202 #define UART_ENABLE             0x0001
203 #define UART_DISABLE            0x0000
204
205 /* CP210X_(SET|GET)_BAUDDIV */
206 #define BAUD_RATE_GEN_FREQ      0x384000
207
208 /* CP210X_(SET|GET)_LINE_CTL */
209 #define BITS_DATA_MASK          0X0f00
210 #define BITS_DATA_5             0X0500
211 #define BITS_DATA_6             0X0600
212 #define BITS_DATA_7             0X0700
213 #define BITS_DATA_8             0X0800
214 #define BITS_DATA_9             0X0900
215
216 #define BITS_PARITY_MASK        0x00f0
217 #define BITS_PARITY_NONE        0x0000
218 #define BITS_PARITY_ODD         0x0010
219 #define BITS_PARITY_EVEN        0x0020
220 #define BITS_PARITY_MARK        0x0030
221 #define BITS_PARITY_SPACE       0x0040
222
223 #define BITS_STOP_MASK          0x000f
224 #define BITS_STOP_1             0x0000
225 #define BITS_STOP_1_5           0x0001
226 #define BITS_STOP_2             0x0002
227
228 /* CP210X_SET_BREAK */
229 #define BREAK_ON                0x0001
230 #define BREAK_OFF               0x0000
231
232 /* CP210X_(SET_MHS|GET_MDMSTS) */
233 #define CONTROL_DTR             0x0001
234 #define CONTROL_RTS             0x0002
235 #define CONTROL_CTS             0x0010
236 #define CONTROL_DSR             0x0020
237 #define CONTROL_RING            0x0040
238 #define CONTROL_DCD             0x0080
239 #define CONTROL_WRITE_DTR       0x0100
240 #define CONTROL_WRITE_RTS       0x0200
241
242 /*
243  * cp210x_get_config
244  * Reads from the CP210x configuration registers
245  * 'size' is specified in bytes.
246  * 'data' is a pointer to a pre-allocated array of integers large
247  * enough to hold 'size' bytes (with 4 bytes to each integer)
248  */
249 static int cp210x_get_config(struct usb_serial_port *port, u8 request,
250                 unsigned int *data, int size)
251 {
252         struct usb_serial *serial = port->serial;
253         __le32 *buf;
254         int result, i, length;
255
256         /* Number of integers required to contain the array */
257         length = (((size - 1) | 3) + 1)/4;
258
259         buf = kcalloc(length, sizeof(__le32), GFP_KERNEL);
260         if (!buf) {
261                 dev_err(&port->dev, "%s - out of memory.\n", __func__);
262                 return -ENOMEM;
263         }
264
265         /* Issue the request, attempting to read 'size' bytes */
266         result = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
267                                 request, REQTYPE_DEVICE_TO_HOST, 0x0000,
268                                 0, buf, size, 300);
269
270         /* Convert data into an array of integers */
271         for (i = 0; i < length; i++)
272                 data[i] = le32_to_cpu(buf[i]);
273
274         kfree(buf);
275
276         if (result != size) {
277                 dbg("%s - Unable to send config request, "
278                                 "request=0x%x size=%d result=%d\n",
279                                 __func__, request, size, result);
280                 return -EPROTO;
281         }
282
283         return 0;
284 }
285
286 /*
287  * cp210x_set_config
288  * Writes to the CP210x configuration registers
289  * Values less than 16 bits wide are sent directly
290  * 'size' is specified in bytes.
291  */
292 static int cp210x_set_config(struct usb_serial_port *port, u8 request,
293                 unsigned int *data, int size)
294 {
295         struct usb_serial *serial = port->serial;
296         __le32 *buf;
297         int result, i, length;
298
299         /* Number of integers required to contain the array */
300         length = (((size - 1) | 3) + 1)/4;
301
302         buf = kmalloc(length * sizeof(__le32), GFP_KERNEL);
303         if (!buf) {
304                 dev_err(&port->dev, "%s - out of memory.\n",
305                                 __func__);
306                 return -ENOMEM;
307         }
308
309         /* Array of integers into bytes */
310         for (i = 0; i < length; i++)
311                 buf[i] = cpu_to_le32(data[i]);
312
313         if (size > 2) {
314                 result = usb_control_msg(serial->dev,
315                                 usb_sndctrlpipe(serial->dev, 0),
316                                 request, REQTYPE_HOST_TO_DEVICE, 0x0000,
317                                 0, buf, size, 300);
318         } else {
319                 result = usb_control_msg(serial->dev,
320                                 usb_sndctrlpipe(serial->dev, 0),
321                                 request, REQTYPE_HOST_TO_DEVICE, data[0],
322                                 0, NULL, 0, 300);
323         }
324
325         kfree(buf);
326
327         if ((size > 2 && result != size) || result < 0) {
328                 dbg("%s - Unable to send request, "
329                                 "request=0x%x size=%d result=%d\n",
330                                 __func__, request, size, result);
331                 return -EPROTO;
332         }
333
334         return 0;
335 }
336
337 /*
338  * cp210x_set_config_single
339  * Convenience function for calling cp210x_set_config on single data values
340  * without requiring an integer pointer
341  */
342 static inline int cp210x_set_config_single(struct usb_serial_port *port,
343                 u8 request, unsigned int data)
344 {
345         return cp210x_set_config(port, request, &data, 2);
346 }
347
348 /*
349  * cp210x_quantise_baudrate
350  * Quantises the baud rate as per AN205 Table 1
351  */
352 static unsigned int cp210x_quantise_baudrate(unsigned int baud) {
353         if      (baud <= 56)       baud = 0;
354         else if (baud <= 300)      baud = 300;
355         else if (baud <= 600)      baud = 600;
356         else if (baud <= 1200)     baud = 1200;
357         else if (baud <= 1800)     baud = 1800;
358         else if (baud <= 2400)     baud = 2400;
359         else if (baud <= 4000)     baud = 4000;
360         else if (baud <= 4803)     baud = 4800;
361         else if (baud <= 7207)     baud = 7200;
362         else if (baud <= 9612)     baud = 9600;
363         else if (baud <= 14428)    baud = 14400;
364         else if (baud <= 16062)    baud = 16000;
365         else if (baud <= 19250)    baud = 19200;
366         else if (baud <= 28912)    baud = 28800;
367         else if (baud <= 38601)    baud = 38400;
368         else if (baud <= 51558)    baud = 51200;
369         else if (baud <= 56280)    baud = 56000;
370         else if (baud <= 58053)    baud = 57600;
371         else if (baud <= 64111)    baud = 64000;
372         else if (baud <= 77608)    baud = 76800;
373         else if (baud <= 117028)   baud = 115200;
374         else if (baud <= 129347)   baud = 128000;
375         else if (baud <= 156868)   baud = 153600;
376         else if (baud <= 237832)   baud = 230400;
377         else if (baud <= 254234)   baud = 250000;
378         else if (baud <= 273066)   baud = 256000;
379         else if (baud <= 491520)   baud = 460800;
380         else if (baud <= 567138)   baud = 500000;
381         else if (baud <= 670254)   baud = 576000;
382         else if (baud <= 1053257)  baud = 921600;
383         else if (baud <= 1474560)  baud = 1228800;
384         else if (baud <= 2457600)  baud = 1843200;
385         else                       baud = 3686400;
386         return baud;
387 }
388
389 static int cp210x_open(struct tty_struct *tty, struct usb_serial_port *port)
390 {
391         int result;
392
393         dbg("%s - port %d", __func__, port->number);
394
395         if (cp210x_set_config_single(port, CP210X_IFC_ENABLE, UART_ENABLE)) {
396                 dev_err(&port->dev, "%s - Unable to enable UART\n",
397                                 __func__);
398                 return -EPROTO;
399         }
400
401         result = usb_serial_generic_open(tty, port);
402         if (result)
403                 return result;
404
405         /* Configure the termios structure */
406         cp210x_get_termios(tty, port);
407         return 0;
408 }
409
410 static void cp210x_close(struct usb_serial_port *port)
411 {
412         dbg("%s - port %d", __func__, port->number);
413
414         usb_serial_generic_close(port);
415
416         mutex_lock(&port->serial->disc_mutex);
417         if (!port->serial->disconnected)
418                 cp210x_set_config_single(port, CP210X_IFC_ENABLE, UART_DISABLE);
419         mutex_unlock(&port->serial->disc_mutex);
420 }
421
422 /*
423  * cp210x_get_termios
424  * Reads the baud rate, data bits, parity, stop bits and flow control mode
425  * from the device, corrects any unsupported values, and configures the
426  * termios structure to reflect the state of the device
427  */
428 static void cp210x_get_termios(struct tty_struct *tty,
429         struct usb_serial_port *port)
430 {
431         unsigned int baud;
432
433         if (tty) {
434                 cp210x_get_termios_port(tty->driver_data,
435                         &tty->termios->c_cflag, &baud);
436                 tty_encode_baud_rate(tty, baud, baud);
437         }
438
439         else {
440                 unsigned int cflag;
441                 cflag = 0;
442                 cp210x_get_termios_port(port, &cflag, &baud);
443         }
444 }
445
446 /*
447  * cp210x_get_termios_port
448  * This is the heart of cp210x_get_termios which always uses a &usb_serial_port.
449  */
450 static void cp210x_get_termios_port(struct usb_serial_port *port,
451         unsigned int *cflagp, unsigned int *baudp)
452 {
453         unsigned int cflag, modem_ctl[4];
454         unsigned int baud;
455         unsigned int bits;
456
457         dbg("%s - port %d", __func__, port->number);
458
459         cp210x_get_config(port, CP210X_GET_BAUDDIV, &baud, 2);
460         /* Convert to baudrate */
461         if (baud)
462                 baud = cp210x_quantise_baudrate((BAUD_RATE_GEN_FREQ + baud/2)/ baud);
463
464         dbg("%s - baud rate = %d", __func__, baud);
465         *baudp = baud;
466
467         cflag = *cflagp;
468
469         cp210x_get_config(port, CP210X_GET_LINE_CTL, &bits, 2);
470         cflag &= ~CSIZE;
471         switch (bits & BITS_DATA_MASK) {
472         case BITS_DATA_5:
473                 dbg("%s - data bits = 5", __func__);
474                 cflag |= CS5;
475                 break;
476         case BITS_DATA_6:
477                 dbg("%s - data bits = 6", __func__);
478                 cflag |= CS6;
479                 break;
480         case BITS_DATA_7:
481                 dbg("%s - data bits = 7", __func__);
482                 cflag |= CS7;
483                 break;
484         case BITS_DATA_8:
485                 dbg("%s - data bits = 8", __func__);
486                 cflag |= CS8;
487                 break;
488         case BITS_DATA_9:
489                 dbg("%s - data bits = 9 (not supported, using 8 data bits)",
490                                                                 __func__);
491                 cflag |= CS8;
492                 bits &= ~BITS_DATA_MASK;
493                 bits |= BITS_DATA_8;
494                 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2);
495                 break;
496         default:
497                 dbg("%s - Unknown number of data bits, using 8", __func__);
498                 cflag |= CS8;
499                 bits &= ~BITS_DATA_MASK;
500                 bits |= BITS_DATA_8;
501                 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2);
502                 break;
503         }
504
505         switch (bits & BITS_PARITY_MASK) {
506         case BITS_PARITY_NONE:
507                 dbg("%s - parity = NONE", __func__);
508                 cflag &= ~PARENB;
509                 break;
510         case BITS_PARITY_ODD:
511                 dbg("%s - parity = ODD", __func__);
512                 cflag |= (PARENB|PARODD);
513                 break;
514         case BITS_PARITY_EVEN:
515                 dbg("%s - parity = EVEN", __func__);
516                 cflag &= ~PARODD;
517                 cflag |= PARENB;
518                 break;
519         case BITS_PARITY_MARK:
520                 dbg("%s - parity = MARK (not supported, disabling parity)",
521                                 __func__);
522                 cflag &= ~PARENB;
523                 bits &= ~BITS_PARITY_MASK;
524                 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2);
525                 break;
526         case BITS_PARITY_SPACE:
527                 dbg("%s - parity = SPACE (not supported, disabling parity)",
528                                 __func__);
529                 cflag &= ~PARENB;
530                 bits &= ~BITS_PARITY_MASK;
531                 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2);
532                 break;
533         default:
534                 dbg("%s - Unknown parity mode, disabling parity", __func__);
535                 cflag &= ~PARENB;
536                 bits &= ~BITS_PARITY_MASK;
537                 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2);
538                 break;
539         }
540
541         cflag &= ~CSTOPB;
542         switch (bits & BITS_STOP_MASK) {
543         case BITS_STOP_1:
544                 dbg("%s - stop bits = 1", __func__);
545                 break;
546         case BITS_STOP_1_5:
547                 dbg("%s - stop bits = 1.5 (not supported, using 1 stop bit)",
548                                                                 __func__);
549                 bits &= ~BITS_STOP_MASK;
550                 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2);
551                 break;
552         case BITS_STOP_2:
553                 dbg("%s - stop bits = 2", __func__);
554                 cflag |= CSTOPB;
555                 break;
556         default:
557                 dbg("%s - Unknown number of stop bits, using 1 stop bit",
558                                                                 __func__);
559                 bits &= ~BITS_STOP_MASK;
560                 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2);
561                 break;
562         }
563
564         cp210x_get_config(port, CP210X_GET_FLOW, modem_ctl, 16);
565         if (modem_ctl[0] & 0x0008) {
566                 dbg("%s - flow control = CRTSCTS", __func__);
567                 cflag |= CRTSCTS;
568         } else {
569                 dbg("%s - flow control = NONE", __func__);
570                 cflag &= ~CRTSCTS;
571         }
572
573         *cflagp = cflag;
574 }
575
576 static void cp210x_set_termios(struct tty_struct *tty,
577                 struct usb_serial_port *port, struct ktermios *old_termios)
578 {
579         unsigned int cflag, old_cflag;
580         unsigned int baud = 0, bits;
581         unsigned int modem_ctl[4];
582
583         dbg("%s - port %d", __func__, port->number);
584
585         if (!tty)
586                 return;
587
588         tty->termios->c_cflag &= ~CMSPAR;
589         cflag = tty->termios->c_cflag;
590         old_cflag = old_termios->c_cflag;
591         baud = cp210x_quantise_baudrate(tty_get_baud_rate(tty));
592
593         /* If the baud rate is to be updated*/
594         if (baud != tty_termios_baud_rate(old_termios) && baud != 0) {
595                 dbg("%s - Setting baud rate to %d baud", __func__,
596                                 baud);
597                 if (cp210x_set_config_single(port, CP210X_SET_BAUDDIV,
598                                         ((BAUD_RATE_GEN_FREQ + baud/2) / baud))) {
599                         dbg("Baud rate requested not supported by device");
600                         baud = tty_termios_baud_rate(old_termios);
601                 }
602         }
603         /* Report back the resulting baud rate */
604         tty_encode_baud_rate(tty, baud, baud);
605
606         /* If the number of data bits is to be updated */
607         if ((cflag & CSIZE) != (old_cflag & CSIZE)) {
608                 cp210x_get_config(port, CP210X_GET_LINE_CTL, &bits, 2);
609                 bits &= ~BITS_DATA_MASK;
610                 switch (cflag & CSIZE) {
611                 case CS5:
612                         bits |= BITS_DATA_5;
613                         dbg("%s - data bits = 5", __func__);
614                         break;
615                 case CS6:
616                         bits |= BITS_DATA_6;
617                         dbg("%s - data bits = 6", __func__);
618                         break;
619                 case CS7:
620                         bits |= BITS_DATA_7;
621                         dbg("%s - data bits = 7", __func__);
622                         break;
623                 case CS8:
624                         bits |= BITS_DATA_8;
625                         dbg("%s - data bits = 8", __func__);
626                         break;
627                 /*case CS9:
628                         bits |= BITS_DATA_9;
629                         dbg("%s - data bits = 9", __func__);
630                         break;*/
631                 default:
632                         dbg("cp210x driver does not "
633                                         "support the number of bits requested,"
634                                         " using 8 bit mode\n");
635                                 bits |= BITS_DATA_8;
636                                 break;
637                 }
638                 if (cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2))
639                         dbg("Number of data bits requested "
640                                         "not supported by device\n");
641         }
642
643         if ((cflag & (PARENB|PARODD)) != (old_cflag & (PARENB|PARODD))) {
644                 cp210x_get_config(port, CP210X_GET_LINE_CTL, &bits, 2);
645                 bits &= ~BITS_PARITY_MASK;
646                 if (cflag & PARENB) {
647                         if (cflag & PARODD) {
648                                 bits |= BITS_PARITY_ODD;
649                                 dbg("%s - parity = ODD", __func__);
650                         } else {
651                                 bits |= BITS_PARITY_EVEN;
652                                 dbg("%s - parity = EVEN", __func__);
653                         }
654                 }
655                 if (cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2))
656                         dbg("Parity mode not supported "
657                                         "by device\n");
658         }
659
660         if ((cflag & CSTOPB) != (old_cflag & CSTOPB)) {
661                 cp210x_get_config(port, CP210X_GET_LINE_CTL, &bits, 2);
662                 bits &= ~BITS_STOP_MASK;
663                 if (cflag & CSTOPB) {
664                         bits |= BITS_STOP_2;
665                         dbg("%s - stop bits = 2", __func__);
666                 } else {
667                         bits |= BITS_STOP_1;
668                         dbg("%s - stop bits = 1", __func__);
669                 }
670                 if (cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2))
671                         dbg("Number of stop bits requested "
672                                         "not supported by device\n");
673         }
674
675         if ((cflag & CRTSCTS) != (old_cflag & CRTSCTS)) {
676                 cp210x_get_config(port, CP210X_GET_FLOW, modem_ctl, 16);
677                 dbg("%s - read modem controls = 0x%.4x 0x%.4x 0x%.4x 0x%.4x",
678                                 __func__, modem_ctl[0], modem_ctl[1],
679                                 modem_ctl[2], modem_ctl[3]);
680
681                 if (cflag & CRTSCTS) {
682                         modem_ctl[0] &= ~0x7B;
683                         modem_ctl[0] |= 0x09;
684                         modem_ctl[1] = 0x80;
685                         dbg("%s - flow control = CRTSCTS", __func__);
686                 } else {
687                         modem_ctl[0] &= ~0x7B;
688                         modem_ctl[0] |= 0x01;
689                         modem_ctl[1] |= 0x40;
690                         dbg("%s - flow control = NONE", __func__);
691                 }
692
693                 dbg("%s - write modem controls = 0x%.4x 0x%.4x 0x%.4x 0x%.4x",
694                                 __func__, modem_ctl[0], modem_ctl[1],
695                                 modem_ctl[2], modem_ctl[3]);
696                 cp210x_set_config(port, CP210X_SET_FLOW, modem_ctl, 16);
697         }
698
699 }
700
701 static int cp210x_tiocmset (struct tty_struct *tty, struct file *file,
702                 unsigned int set, unsigned int clear)
703 {
704         struct usb_serial_port *port = tty->driver_data;
705         return cp210x_tiocmset_port(port, file, set, clear);
706 }
707
708 static int cp210x_tiocmset_port(struct usb_serial_port *port, struct file *file,
709                 unsigned int set, unsigned int clear)
710 {
711         unsigned int control = 0;
712
713         dbg("%s - port %d", __func__, port->number);
714
715         if (set & TIOCM_RTS) {
716                 control |= CONTROL_RTS;
717                 control |= CONTROL_WRITE_RTS;
718         }
719         if (set & TIOCM_DTR) {
720                 control |= CONTROL_DTR;
721                 control |= CONTROL_WRITE_DTR;
722         }
723         if (clear & TIOCM_RTS) {
724                 control &= ~CONTROL_RTS;
725                 control |= CONTROL_WRITE_RTS;
726         }
727         if (clear & TIOCM_DTR) {
728                 control &= ~CONTROL_DTR;
729                 control |= CONTROL_WRITE_DTR;
730         }
731
732         dbg("%s - control = 0x%.4x", __func__, control);
733
734         return cp210x_set_config(port, CP210X_SET_MHS, &control, 2);
735 }
736
737 static void cp210x_dtr_rts(struct usb_serial_port *p, int on)
738 {
739         if (on)
740                 cp210x_tiocmset_port(p, NULL,  TIOCM_DTR|TIOCM_RTS, 0);
741         else
742                 cp210x_tiocmset_port(p, NULL,  0, TIOCM_DTR|TIOCM_RTS);
743 }
744
745 static int cp210x_tiocmget (struct tty_struct *tty, struct file *file)
746 {
747         struct usb_serial_port *port = tty->driver_data;
748         unsigned int control;
749         int result;
750
751         dbg("%s - port %d", __func__, port->number);
752
753         cp210x_get_config(port, CP210X_GET_MDMSTS, &control, 1);
754
755         result = ((control & CONTROL_DTR) ? TIOCM_DTR : 0)
756                 |((control & CONTROL_RTS) ? TIOCM_RTS : 0)
757                 |((control & CONTROL_CTS) ? TIOCM_CTS : 0)
758                 |((control & CONTROL_DSR) ? TIOCM_DSR : 0)
759                 |((control & CONTROL_RING)? TIOCM_RI  : 0)
760                 |((control & CONTROL_DCD) ? TIOCM_CD  : 0);
761
762         dbg("%s - control = 0x%.2x", __func__, control);
763
764         return result;
765 }
766
767 static int cp210x_carrier_raised(struct usb_serial_port *p)
768 {
769         unsigned int control;
770         cp210x_get_config(p, CP210X_GET_MDMSTS, &control, 1);
771         if (control & CONTROL_DCD)
772                 return 1;
773         return 0;
774 }
775
776 static void cp210x_break_ctl (struct tty_struct *tty, int break_state)
777 {
778         struct usb_serial_port *port = tty->driver_data;
779         unsigned int state;
780
781         dbg("%s - port %d", __func__, port->number);
782         if (break_state == 0)
783                 state = BREAK_OFF;
784         else
785                 state = BREAK_ON;
786         dbg("%s - turning break %s", __func__,
787                         state == BREAK_OFF ? "off" : "on");
788         cp210x_set_config(port, CP210X_SET_BREAK, &state, 2);
789 }
790
791 static int cp210x_startup(struct usb_serial *serial)
792 {
793         /* cp210x buffers behave strangely unless device is reset */
794         usb_reset_device(serial->dev);
795         return 0;
796 }
797
798 static int __init cp210x_init(void)
799 {
800         int retval;
801
802         retval = usb_serial_register(&cp210x_device);
803         if (retval)
804                 return retval; /* Failed to register */
805
806         retval = usb_register(&cp210x_driver);
807         if (retval) {
808                 /* Failed to register */
809                 usb_serial_deregister(&cp210x_device);
810                 return retval;
811         }
812
813         /* Success */
814         printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_VERSION ":"
815                DRIVER_DESC "\n");
816         return 0;
817 }
818
819 static void __exit cp210x_exit(void)
820 {
821         usb_deregister(&cp210x_driver);
822         usb_serial_deregister(&cp210x_device);
823 }
824
825 module_init(cp210x_init);
826 module_exit(cp210x_exit);
827
828 MODULE_DESCRIPTION(DRIVER_DESC);
829 MODULE_VERSION(DRIVER_VERSION);
830 MODULE_LICENSE("GPL");
831
832 module_param(debug, bool, S_IRUGO | S_IWUSR);
833 MODULE_PARM_DESC(debug, "Enable verbose debugging messages");