USB: cp210x: Add B&G H3000 link cable 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(0x0471, 0x066A) }, /* AKTAKOM ACE-1001 cable */
58         { USB_DEVICE(0x0489, 0xE000) }, /* Pirelli Broadband S.p.A, DP-L10 SIP/GSM Mobile */
59         { USB_DEVICE(0x0745, 0x1000) }, /* CipherLab USB CCD Barcode Scanner 1000 */
60         { USB_DEVICE(0x08e6, 0x5501) }, /* Gemalto Prox-PU/CU contactless smartcard reader */
61         { USB_DEVICE(0x08FD, 0x000A) }, /* Digianswer A/S , ZigBee/802.15.4 MAC Device */
62         { USB_DEVICE(0x0BED, 0x1100) }, /* MEI (TM) Cashflow-SC Bill/Voucher Acceptor */
63         { USB_DEVICE(0x0BED, 0x1101) }, /* MEI series 2000 Combo Acceptor */
64         { USB_DEVICE(0x0FCF, 0x1003) }, /* Dynastream ANT development board */
65         { USB_DEVICE(0x0FCF, 0x1004) }, /* Dynastream ANT2USB */
66         { USB_DEVICE(0x0FCF, 0x1006) }, /* Dynastream ANT development board */
67         { USB_DEVICE(0x10A6, 0xAA26) }, /* Knock-off DCU-11 cable */
68         { USB_DEVICE(0x10AB, 0x10C5) }, /* Siemens MC60 Cable */
69         { USB_DEVICE(0x10B5, 0xAC70) }, /* Nokia CA-42 USB */
70         { USB_DEVICE(0x10C4, 0x0F91) }, /* Vstabi */
71         { USB_DEVICE(0x10C4, 0x1101) }, /* Arkham Technology DS101 Bus Monitor */
72         { USB_DEVICE(0x10C4, 0x1601) }, /* Arkham Technology DS101 Adapter */
73         { USB_DEVICE(0x10C4, 0x800A) }, /* SPORTident BSM7-D-USB main station */
74         { USB_DEVICE(0x10C4, 0x803B) }, /* Pololu USB-serial converter */
75         { USB_DEVICE(0x10C4, 0x8044) }, /* Cygnal Debug Adapter */
76         { USB_DEVICE(0x10C4, 0x804E) }, /* Software Bisque Paramount ME build-in converter */
77         { USB_DEVICE(0x10C4, 0x8053) }, /* Enfora EDG1228 */
78         { USB_DEVICE(0x10C4, 0x8054) }, /* Enfora GSM2228 */
79         { USB_DEVICE(0x10C4, 0x8066) }, /* Argussoft In-System Programmer */
80         { USB_DEVICE(0x10C4, 0x806F) }, /* IMS USB to RS422 Converter Cable */
81         { USB_DEVICE(0x10C4, 0x807A) }, /* Crumb128 board */
82         { USB_DEVICE(0x10C4, 0x80CA) }, /* Degree Controls Inc */
83         { USB_DEVICE(0x10C4, 0x80DD) }, /* Tracient RFID */
84         { USB_DEVICE(0x10C4, 0x80F6) }, /* Suunto sports instrument */
85         { USB_DEVICE(0x10C4, 0x8115) }, /* Arygon NFC/Mifare Reader */
86         { USB_DEVICE(0x10C4, 0x813D) }, /* Burnside Telecom Deskmobile */
87         { USB_DEVICE(0x10C4, 0x813F) }, /* Tams Master Easy Control */
88         { USB_DEVICE(0x10C4, 0x8149) }, /* West Mountain Radio Computerized Battery Analyzer */
89         { USB_DEVICE(0x10C4, 0x814A) }, /* West Mountain Radio RIGblaster P&P */
90         { USB_DEVICE(0x10C4, 0x814B) }, /* West Mountain Radio RIGtalk */
91         { USB_DEVICE(0x10C4, 0x8156) }, /* B&G H3000 link cable */
92         { USB_DEVICE(0x10C4, 0x815E) }, /* Helicomm IP-Link 1220-DVM */
93         { USB_DEVICE(0x10C4, 0x818B) }, /* AVIT Research USB to TTL */
94         { USB_DEVICE(0x10C4, 0x819F) }, /* MJS USB Toslink Switcher */
95         { USB_DEVICE(0x10C4, 0x81A6) }, /* ThinkOptics WavIt */
96         { USB_DEVICE(0x10C4, 0x81AC) }, /* MSD Dash Hawk */
97         { USB_DEVICE(0x10C4, 0x81AD) }, /* INSYS USB Modem */
98         { USB_DEVICE(0x10C4, 0x81C8) }, /* Lipowsky Industrie Elektronik GmbH, Baby-JTAG */
99         { USB_DEVICE(0x10C4, 0x81E2) }, /* Lipowsky Industrie Elektronik GmbH, Baby-LIN */
100         { USB_DEVICE(0x10C4, 0x81E7) }, /* Aerocomm Radio */
101         { USB_DEVICE(0x10C4, 0x81E8) }, /* Zephyr Bioharness */
102         { USB_DEVICE(0x10C4, 0x81F2) }, /* C1007 HF band RFID controller */
103         { USB_DEVICE(0x10C4, 0x8218) }, /* Lipowsky Industrie Elektronik GmbH, HARP-1 */
104         { USB_DEVICE(0x10C4, 0x822B) }, /* Modem EDGE(GSM) Comander 2 */
105         { USB_DEVICE(0x10C4, 0x826B) }, /* Cygnal Integrated Products, Inc., Fasttrax GPS demostration module */
106         { USB_DEVICE(0x10C4, 0x8293) }, /* Telegesys ETRX2USB */
107         { USB_DEVICE(0x10C4, 0x82F9) }, /* Procyon AVS */
108         { USB_DEVICE(0x10C4, 0x8341) }, /* Siemens MC35PU GPRS Modem */
109         { USB_DEVICE(0x10C4, 0x8382) }, /* Cygnal Integrated Products, Inc. */
110         { USB_DEVICE(0x10C4, 0x83A8) }, /* Amber Wireless AMB2560 */
111         { USB_DEVICE(0x10C4, 0x8411) }, /* Kyocera GPS Module */
112         { USB_DEVICE(0x10C4, 0x846E) }, /* BEI USB Sensor Interface (VCP) */
113         { USB_DEVICE(0x10C4, 0x8477) }, /* Balluff RFID */
114         { USB_DEVICE(0x10C4, 0xEA60) }, /* Silicon Labs factory default */
115         { USB_DEVICE(0x10C4, 0xEA61) }, /* Silicon Labs factory default */
116         { USB_DEVICE(0x10C4, 0xEA71) }, /* Infinity GPS-MIC-1 Radio Monophone */
117         { USB_DEVICE(0x10C4, 0xF001) }, /* Elan Digital Systems USBscope50 */
118         { USB_DEVICE(0x10C4, 0xF002) }, /* Elan Digital Systems USBwave12 */
119         { USB_DEVICE(0x10C4, 0xF003) }, /* Elan Digital Systems USBpulse100 */
120         { USB_DEVICE(0x10C4, 0xF004) }, /* Elan Digital Systems USBcount50 */
121         { USB_DEVICE(0x10C5, 0xEA61) }, /* Silicon Labs MobiData GPRS USB Modem */
122         { USB_DEVICE(0x10CE, 0xEA6A) }, /* Silicon Labs MobiData GPRS USB Modem 100EU */
123         { USB_DEVICE(0x13AD, 0x9999) }, /* Baltech card reader */
124         { USB_DEVICE(0x1555, 0x0004) }, /* Owen AC4 USB-RS485 Converter */
125         { USB_DEVICE(0x166A, 0x0303) }, /* Clipsal 5500PCU C-Bus USB interface */
126         { USB_DEVICE(0x16D6, 0x0001) }, /* Jablotron serial interface */
127         { USB_DEVICE(0x16DC, 0x0010) }, /* W-IE-NE-R Plein & Baus GmbH PL512 Power Supply */
128         { USB_DEVICE(0x16DC, 0x0011) }, /* W-IE-NE-R Plein & Baus GmbH RCM Remote Control for MARATON Power Supply */
129         { USB_DEVICE(0x16DC, 0x0012) }, /* W-IE-NE-R Plein & Baus GmbH MPOD Multi Channel Power Supply */
130         { USB_DEVICE(0x16DC, 0x0015) }, /* W-IE-NE-R Plein & Baus GmbH CML Control, Monitoring and Data Logger */
131         { USB_DEVICE(0x17F4, 0xAAAA) }, /* Wavesense Jazz blood glucose meter */
132         { USB_DEVICE(0x1843, 0x0200) }, /* Vaisala USB Instrument Cable */
133         { USB_DEVICE(0x18EF, 0xE00F) }, /* ELV USB-I2C-Interface */
134         { USB_DEVICE(0x413C, 0x9500) }, /* DW700 GPS USB interface */
135         { } /* Terminating Entry */
136 };
137
138 MODULE_DEVICE_TABLE(usb, id_table);
139
140 static struct usb_driver cp210x_driver = {
141         .name           = "cp210x",
142         .probe          = usb_serial_probe,
143         .disconnect     = usb_serial_disconnect,
144         .id_table       = id_table,
145         .no_dynamic_id  =       1,
146 };
147
148 static struct usb_serial_driver cp210x_device = {
149         .driver = {
150                 .owner =        THIS_MODULE,
151                 .name =         "cp210x",
152         },
153         .usb_driver             = &cp210x_driver,
154         .id_table               = id_table,
155         .num_ports              = 1,
156         .bulk_in_size           = 256,
157         .bulk_out_size          = 256,
158         .open                   = cp210x_open,
159         .close                  = cp210x_close,
160         .break_ctl              = cp210x_break_ctl,
161         .set_termios            = cp210x_set_termios,
162         .tiocmget               = cp210x_tiocmget,
163         .tiocmset               = cp210x_tiocmset,
164         .attach                 = cp210x_startup,
165         .dtr_rts                = cp210x_dtr_rts,
166         .carrier_raised         = cp210x_carrier_raised
167 };
168
169 /* Config request types */
170 #define REQTYPE_HOST_TO_DEVICE  0x41
171 #define REQTYPE_DEVICE_TO_HOST  0xc1
172
173 /* Config request codes */
174 #define CP210X_IFC_ENABLE       0x00
175 #define CP210X_SET_BAUDDIV      0x01
176 #define CP210X_GET_BAUDDIV      0x02
177 #define CP210X_SET_LINE_CTL     0x03
178 #define CP210X_GET_LINE_CTL     0x04
179 #define CP210X_SET_BREAK        0x05
180 #define CP210X_IMM_CHAR         0x06
181 #define CP210X_SET_MHS          0x07
182 #define CP210X_GET_MDMSTS       0x08
183 #define CP210X_SET_XON          0x09
184 #define CP210X_SET_XOFF         0x0A
185 #define CP210X_SET_EVENTMASK    0x0B
186 #define CP210X_GET_EVENTMASK    0x0C
187 #define CP210X_SET_CHAR         0x0D
188 #define CP210X_GET_CHARS        0x0E
189 #define CP210X_GET_PROPS        0x0F
190 #define CP210X_GET_COMM_STATUS  0x10
191 #define CP210X_RESET            0x11
192 #define CP210X_PURGE            0x12
193 #define CP210X_SET_FLOW         0x13
194 #define CP210X_GET_FLOW         0x14
195 #define CP210X_EMBED_EVENTS     0x15
196 #define CP210X_GET_EVENTSTATE   0x16
197 #define CP210X_SET_CHARS        0x19
198
199 /* CP210X_IFC_ENABLE */
200 #define UART_ENABLE             0x0001
201 #define UART_DISABLE            0x0000
202
203 /* CP210X_(SET|GET)_BAUDDIV */
204 #define BAUD_RATE_GEN_FREQ      0x384000
205
206 /* CP210X_(SET|GET)_LINE_CTL */
207 #define BITS_DATA_MASK          0X0f00
208 #define BITS_DATA_5             0X0500
209 #define BITS_DATA_6             0X0600
210 #define BITS_DATA_7             0X0700
211 #define BITS_DATA_8             0X0800
212 #define BITS_DATA_9             0X0900
213
214 #define BITS_PARITY_MASK        0x00f0
215 #define BITS_PARITY_NONE        0x0000
216 #define BITS_PARITY_ODD         0x0010
217 #define BITS_PARITY_EVEN        0x0020
218 #define BITS_PARITY_MARK        0x0030
219 #define BITS_PARITY_SPACE       0x0040
220
221 #define BITS_STOP_MASK          0x000f
222 #define BITS_STOP_1             0x0000
223 #define BITS_STOP_1_5           0x0001
224 #define BITS_STOP_2             0x0002
225
226 /* CP210X_SET_BREAK */
227 #define BREAK_ON                0x0001
228 #define BREAK_OFF               0x0000
229
230 /* CP210X_(SET_MHS|GET_MDMSTS) */
231 #define CONTROL_DTR             0x0001
232 #define CONTROL_RTS             0x0002
233 #define CONTROL_CTS             0x0010
234 #define CONTROL_DSR             0x0020
235 #define CONTROL_RING            0x0040
236 #define CONTROL_DCD             0x0080
237 #define CONTROL_WRITE_DTR       0x0100
238 #define CONTROL_WRITE_RTS       0x0200
239
240 /*
241  * cp210x_get_config
242  * Reads from the CP210x configuration registers
243  * 'size' is specified in bytes.
244  * 'data' is a pointer to a pre-allocated array of integers large
245  * enough to hold 'size' bytes (with 4 bytes to each integer)
246  */
247 static int cp210x_get_config(struct usb_serial_port *port, u8 request,
248                 unsigned int *data, int size)
249 {
250         struct usb_serial *serial = port->serial;
251         __le32 *buf;
252         int result, i, length;
253
254         /* Number of integers required to contain the array */
255         length = (((size - 1) | 3) + 1)/4;
256
257         buf = kcalloc(length, sizeof(__le32), GFP_KERNEL);
258         if (!buf) {
259                 dev_err(&port->dev, "%s - out of memory.\n", __func__);
260                 return -ENOMEM;
261         }
262
263         /* Issue the request, attempting to read 'size' bytes */
264         result = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
265                                 request, REQTYPE_DEVICE_TO_HOST, 0x0000,
266                                 0, buf, size, 300);
267
268         /* Convert data into an array of integers */
269         for (i = 0; i < length; i++)
270                 data[i] = le32_to_cpu(buf[i]);
271
272         kfree(buf);
273
274         if (result != size) {
275                 dbg("%s - Unable to send config request, "
276                                 "request=0x%x size=%d result=%d\n",
277                                 __func__, request, size, result);
278                 return -EPROTO;
279         }
280
281         return 0;
282 }
283
284 /*
285  * cp210x_set_config
286  * Writes to the CP210x configuration registers
287  * Values less than 16 bits wide are sent directly
288  * 'size' is specified in bytes.
289  */
290 static int cp210x_set_config(struct usb_serial_port *port, u8 request,
291                 unsigned int *data, int size)
292 {
293         struct usb_serial *serial = port->serial;
294         __le32 *buf;
295         int result, i, length;
296
297         /* Number of integers required to contain the array */
298         length = (((size - 1) | 3) + 1)/4;
299
300         buf = kmalloc(length * sizeof(__le32), GFP_KERNEL);
301         if (!buf) {
302                 dev_err(&port->dev, "%s - out of memory.\n",
303                                 __func__);
304                 return -ENOMEM;
305         }
306
307         /* Array of integers into bytes */
308         for (i = 0; i < length; i++)
309                 buf[i] = cpu_to_le32(data[i]);
310
311         if (size > 2) {
312                 result = usb_control_msg(serial->dev,
313                                 usb_sndctrlpipe(serial->dev, 0),
314                                 request, REQTYPE_HOST_TO_DEVICE, 0x0000,
315                                 0, buf, size, 300);
316         } else {
317                 result = usb_control_msg(serial->dev,
318                                 usb_sndctrlpipe(serial->dev, 0),
319                                 request, REQTYPE_HOST_TO_DEVICE, data[0],
320                                 0, NULL, 0, 300);
321         }
322
323         kfree(buf);
324
325         if ((size > 2 && result != size) || result < 0) {
326                 dbg("%s - Unable to send request, "
327                                 "request=0x%x size=%d result=%d\n",
328                                 __func__, request, size, result);
329                 return -EPROTO;
330         }
331
332         return 0;
333 }
334
335 /*
336  * cp210x_set_config_single
337  * Convenience function for calling cp210x_set_config on single data values
338  * without requiring an integer pointer
339  */
340 static inline int cp210x_set_config_single(struct usb_serial_port *port,
341                 u8 request, unsigned int data)
342 {
343         return cp210x_set_config(port, request, &data, 2);
344 }
345
346 /*
347  * cp210x_quantise_baudrate
348  * Quantises the baud rate as per AN205 Table 1
349  */
350 static unsigned int cp210x_quantise_baudrate(unsigned int baud) {
351         if      (baud <= 56)       baud = 0;
352         else if (baud <= 300)      baud = 300;
353         else if (baud <= 600)      baud = 600;
354         else if (baud <= 1200)     baud = 1200;
355         else if (baud <= 1800)     baud = 1800;
356         else if (baud <= 2400)     baud = 2400;
357         else if (baud <= 4000)     baud = 4000;
358         else if (baud <= 4803)     baud = 4800;
359         else if (baud <= 7207)     baud = 7200;
360         else if (baud <= 9612)     baud = 9600;
361         else if (baud <= 14428)    baud = 14400;
362         else if (baud <= 16062)    baud = 16000;
363         else if (baud <= 19250)    baud = 19200;
364         else if (baud <= 28912)    baud = 28800;
365         else if (baud <= 38601)    baud = 38400;
366         else if (baud <= 51558)    baud = 51200;
367         else if (baud <= 56280)    baud = 56000;
368         else if (baud <= 58053)    baud = 57600;
369         else if (baud <= 64111)    baud = 64000;
370         else if (baud <= 77608)    baud = 76800;
371         else if (baud <= 117028)   baud = 115200;
372         else if (baud <= 129347)   baud = 128000;
373         else if (baud <= 156868)   baud = 153600;
374         else if (baud <= 237832)   baud = 230400;
375         else if (baud <= 254234)   baud = 250000;
376         else if (baud <= 273066)   baud = 256000;
377         else if (baud <= 491520)   baud = 460800;
378         else if (baud <= 567138)   baud = 500000;
379         else if (baud <= 670254)   baud = 576000;
380         else if (baud <= 1053257)  baud = 921600;
381         else if (baud <= 1474560)  baud = 1228800;
382         else if (baud <= 2457600)  baud = 1843200;
383         else                       baud = 3686400;
384         return baud;
385 }
386
387 static int cp210x_open(struct tty_struct *tty, struct usb_serial_port *port)
388 {
389         int result;
390
391         dbg("%s - port %d", __func__, port->number);
392
393         if (cp210x_set_config_single(port, CP210X_IFC_ENABLE, UART_ENABLE)) {
394                 dev_err(&port->dev, "%s - Unable to enable UART\n",
395                                 __func__);
396                 return -EPROTO;
397         }
398
399         result = usb_serial_generic_open(tty, port);
400         if (result)
401                 return result;
402
403         /* Configure the termios structure */
404         cp210x_get_termios(tty, port);
405         return 0;
406 }
407
408 static void cp210x_close(struct usb_serial_port *port)
409 {
410         dbg("%s - port %d", __func__, port->number);
411
412         usb_serial_generic_close(port);
413
414         mutex_lock(&port->serial->disc_mutex);
415         if (!port->serial->disconnected)
416                 cp210x_set_config_single(port, CP210X_IFC_ENABLE, UART_DISABLE);
417         mutex_unlock(&port->serial->disc_mutex);
418 }
419
420 /*
421  * cp210x_get_termios
422  * Reads the baud rate, data bits, parity, stop bits and flow control mode
423  * from the device, corrects any unsupported values, and configures the
424  * termios structure to reflect the state of the device
425  */
426 static void cp210x_get_termios(struct tty_struct *tty,
427         struct usb_serial_port *port)
428 {
429         unsigned int baud;
430
431         if (tty) {
432                 cp210x_get_termios_port(tty->driver_data,
433                         &tty->termios->c_cflag, &baud);
434                 tty_encode_baud_rate(tty, baud, baud);
435         }
436
437         else {
438                 unsigned int cflag;
439                 cflag = 0;
440                 cp210x_get_termios_port(port, &cflag, &baud);
441         }
442 }
443
444 /*
445  * cp210x_get_termios_port
446  * This is the heart of cp210x_get_termios which always uses a &usb_serial_port.
447  */
448 static void cp210x_get_termios_port(struct usb_serial_port *port,
449         unsigned int *cflagp, unsigned int *baudp)
450 {
451         unsigned int cflag, modem_ctl[4];
452         unsigned int baud;
453         unsigned int bits;
454
455         dbg("%s - port %d", __func__, port->number);
456
457         cp210x_get_config(port, CP210X_GET_BAUDDIV, &baud, 2);
458         /* Convert to baudrate */
459         if (baud)
460                 baud = cp210x_quantise_baudrate((BAUD_RATE_GEN_FREQ + baud/2)/ baud);
461
462         dbg("%s - baud rate = %d", __func__, baud);
463         *baudp = baud;
464
465         cflag = *cflagp;
466
467         cp210x_get_config(port, CP210X_GET_LINE_CTL, &bits, 2);
468         cflag &= ~CSIZE;
469         switch (bits & BITS_DATA_MASK) {
470         case BITS_DATA_5:
471                 dbg("%s - data bits = 5", __func__);
472                 cflag |= CS5;
473                 break;
474         case BITS_DATA_6:
475                 dbg("%s - data bits = 6", __func__);
476                 cflag |= CS6;
477                 break;
478         case BITS_DATA_7:
479                 dbg("%s - data bits = 7", __func__);
480                 cflag |= CS7;
481                 break;
482         case BITS_DATA_8:
483                 dbg("%s - data bits = 8", __func__);
484                 cflag |= CS8;
485                 break;
486         case BITS_DATA_9:
487                 dbg("%s - data bits = 9 (not supported, using 8 data bits)",
488                                                                 __func__);
489                 cflag |= CS8;
490                 bits &= ~BITS_DATA_MASK;
491                 bits |= BITS_DATA_8;
492                 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2);
493                 break;
494         default:
495                 dbg("%s - Unknown number of data bits, using 8", __func__);
496                 cflag |= CS8;
497                 bits &= ~BITS_DATA_MASK;
498                 bits |= BITS_DATA_8;
499                 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2);
500                 break;
501         }
502
503         switch (bits & BITS_PARITY_MASK) {
504         case BITS_PARITY_NONE:
505                 dbg("%s - parity = NONE", __func__);
506                 cflag &= ~PARENB;
507                 break;
508         case BITS_PARITY_ODD:
509                 dbg("%s - parity = ODD", __func__);
510                 cflag |= (PARENB|PARODD);
511                 break;
512         case BITS_PARITY_EVEN:
513                 dbg("%s - parity = EVEN", __func__);
514                 cflag &= ~PARODD;
515                 cflag |= PARENB;
516                 break;
517         case BITS_PARITY_MARK:
518                 dbg("%s - parity = MARK (not supported, disabling parity)",
519                                 __func__);
520                 cflag &= ~PARENB;
521                 bits &= ~BITS_PARITY_MASK;
522                 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2);
523                 break;
524         case BITS_PARITY_SPACE:
525                 dbg("%s - parity = SPACE (not supported, disabling parity)",
526                                 __func__);
527                 cflag &= ~PARENB;
528                 bits &= ~BITS_PARITY_MASK;
529                 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2);
530                 break;
531         default:
532                 dbg("%s - Unknown parity mode, disabling parity", __func__);
533                 cflag &= ~PARENB;
534                 bits &= ~BITS_PARITY_MASK;
535                 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2);
536                 break;
537         }
538
539         cflag &= ~CSTOPB;
540         switch (bits & BITS_STOP_MASK) {
541         case BITS_STOP_1:
542                 dbg("%s - stop bits = 1", __func__);
543                 break;
544         case BITS_STOP_1_5:
545                 dbg("%s - stop bits = 1.5 (not supported, using 1 stop bit)",
546                                                                 __func__);
547                 bits &= ~BITS_STOP_MASK;
548                 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2);
549                 break;
550         case BITS_STOP_2:
551                 dbg("%s - stop bits = 2", __func__);
552                 cflag |= CSTOPB;
553                 break;
554         default:
555                 dbg("%s - Unknown number of stop bits, using 1 stop bit",
556                                                                 __func__);
557                 bits &= ~BITS_STOP_MASK;
558                 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2);
559                 break;
560         }
561
562         cp210x_get_config(port, CP210X_GET_FLOW, modem_ctl, 16);
563         if (modem_ctl[0] & 0x0008) {
564                 dbg("%s - flow control = CRTSCTS", __func__);
565                 cflag |= CRTSCTS;
566         } else {
567                 dbg("%s - flow control = NONE", __func__);
568                 cflag &= ~CRTSCTS;
569         }
570
571         *cflagp = cflag;
572 }
573
574 static void cp210x_set_termios(struct tty_struct *tty,
575                 struct usb_serial_port *port, struct ktermios *old_termios)
576 {
577         unsigned int cflag, old_cflag;
578         unsigned int baud = 0, bits;
579         unsigned int modem_ctl[4];
580
581         dbg("%s - port %d", __func__, port->number);
582
583         if (!tty)
584                 return;
585
586         tty->termios->c_cflag &= ~CMSPAR;
587         cflag = tty->termios->c_cflag;
588         old_cflag = old_termios->c_cflag;
589         baud = cp210x_quantise_baudrate(tty_get_baud_rate(tty));
590
591         /* If the baud rate is to be updated*/
592         if (baud != tty_termios_baud_rate(old_termios) && baud != 0) {
593                 dbg("%s - Setting baud rate to %d baud", __func__,
594                                 baud);
595                 if (cp210x_set_config_single(port, CP210X_SET_BAUDDIV,
596                                         ((BAUD_RATE_GEN_FREQ + baud/2) / baud))) {
597                         dbg("Baud rate requested not supported by device");
598                         baud = tty_termios_baud_rate(old_termios);
599                 }
600         }
601         /* Report back the resulting baud rate */
602         tty_encode_baud_rate(tty, baud, baud);
603
604         /* If the number of data bits is to be updated */
605         if ((cflag & CSIZE) != (old_cflag & CSIZE)) {
606                 cp210x_get_config(port, CP210X_GET_LINE_CTL, &bits, 2);
607                 bits &= ~BITS_DATA_MASK;
608                 switch (cflag & CSIZE) {
609                 case CS5:
610                         bits |= BITS_DATA_5;
611                         dbg("%s - data bits = 5", __func__);
612                         break;
613                 case CS6:
614                         bits |= BITS_DATA_6;
615                         dbg("%s - data bits = 6", __func__);
616                         break;
617                 case CS7:
618                         bits |= BITS_DATA_7;
619                         dbg("%s - data bits = 7", __func__);
620                         break;
621                 case CS8:
622                         bits |= BITS_DATA_8;
623                         dbg("%s - data bits = 8", __func__);
624                         break;
625                 /*case CS9:
626                         bits |= BITS_DATA_9;
627                         dbg("%s - data bits = 9", __func__);
628                         break;*/
629                 default:
630                         dbg("cp210x driver does not "
631                                         "support the number of bits requested,"
632                                         " using 8 bit mode\n");
633                                 bits |= BITS_DATA_8;
634                                 break;
635                 }
636                 if (cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2))
637                         dbg("Number of data bits requested "
638                                         "not supported by device\n");
639         }
640
641         if ((cflag & (PARENB|PARODD)) != (old_cflag & (PARENB|PARODD))) {
642                 cp210x_get_config(port, CP210X_GET_LINE_CTL, &bits, 2);
643                 bits &= ~BITS_PARITY_MASK;
644                 if (cflag & PARENB) {
645                         if (cflag & PARODD) {
646                                 bits |= BITS_PARITY_ODD;
647                                 dbg("%s - parity = ODD", __func__);
648                         } else {
649                                 bits |= BITS_PARITY_EVEN;
650                                 dbg("%s - parity = EVEN", __func__);
651                         }
652                 }
653                 if (cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2))
654                         dbg("Parity mode not supported "
655                                         "by device\n");
656         }
657
658         if ((cflag & CSTOPB) != (old_cflag & CSTOPB)) {
659                 cp210x_get_config(port, CP210X_GET_LINE_CTL, &bits, 2);
660                 bits &= ~BITS_STOP_MASK;
661                 if (cflag & CSTOPB) {
662                         bits |= BITS_STOP_2;
663                         dbg("%s - stop bits = 2", __func__);
664                 } else {
665                         bits |= BITS_STOP_1;
666                         dbg("%s - stop bits = 1", __func__);
667                 }
668                 if (cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2))
669                         dbg("Number of stop bits requested "
670                                         "not supported by device\n");
671         }
672
673         if ((cflag & CRTSCTS) != (old_cflag & CRTSCTS)) {
674                 cp210x_get_config(port, CP210X_GET_FLOW, modem_ctl, 16);
675                 dbg("%s - read modem controls = 0x%.4x 0x%.4x 0x%.4x 0x%.4x",
676                                 __func__, modem_ctl[0], modem_ctl[1],
677                                 modem_ctl[2], modem_ctl[3]);
678
679                 if (cflag & CRTSCTS) {
680                         modem_ctl[0] &= ~0x7B;
681                         modem_ctl[0] |= 0x09;
682                         modem_ctl[1] = 0x80;
683                         dbg("%s - flow control = CRTSCTS", __func__);
684                 } else {
685                         modem_ctl[0] &= ~0x7B;
686                         modem_ctl[0] |= 0x01;
687                         modem_ctl[1] |= 0x40;
688                         dbg("%s - flow control = NONE", __func__);
689                 }
690
691                 dbg("%s - write modem controls = 0x%.4x 0x%.4x 0x%.4x 0x%.4x",
692                                 __func__, modem_ctl[0], modem_ctl[1],
693                                 modem_ctl[2], modem_ctl[3]);
694                 cp210x_set_config(port, CP210X_SET_FLOW, modem_ctl, 16);
695         }
696
697 }
698
699 static int cp210x_tiocmset (struct tty_struct *tty, struct file *file,
700                 unsigned int set, unsigned int clear)
701 {
702         struct usb_serial_port *port = tty->driver_data;
703         return cp210x_tiocmset_port(port, file, set, clear);
704 }
705
706 static int cp210x_tiocmset_port(struct usb_serial_port *port, struct file *file,
707                 unsigned int set, unsigned int clear)
708 {
709         unsigned int control = 0;
710
711         dbg("%s - port %d", __func__, port->number);
712
713         if (set & TIOCM_RTS) {
714                 control |= CONTROL_RTS;
715                 control |= CONTROL_WRITE_RTS;
716         }
717         if (set & TIOCM_DTR) {
718                 control |= CONTROL_DTR;
719                 control |= CONTROL_WRITE_DTR;
720         }
721         if (clear & TIOCM_RTS) {
722                 control &= ~CONTROL_RTS;
723                 control |= CONTROL_WRITE_RTS;
724         }
725         if (clear & TIOCM_DTR) {
726                 control &= ~CONTROL_DTR;
727                 control |= CONTROL_WRITE_DTR;
728         }
729
730         dbg("%s - control = 0x%.4x", __func__, control);
731
732         return cp210x_set_config(port, CP210X_SET_MHS, &control, 2);
733 }
734
735 static void cp210x_dtr_rts(struct usb_serial_port *p, int on)
736 {
737         if (on)
738                 cp210x_tiocmset_port(p, NULL,  TIOCM_DTR|TIOCM_RTS, 0);
739         else
740                 cp210x_tiocmset_port(p, NULL,  0, TIOCM_DTR|TIOCM_RTS);
741 }
742
743 static int cp210x_tiocmget (struct tty_struct *tty, struct file *file)
744 {
745         struct usb_serial_port *port = tty->driver_data;
746         unsigned int control;
747         int result;
748
749         dbg("%s - port %d", __func__, port->number);
750
751         cp210x_get_config(port, CP210X_GET_MDMSTS, &control, 1);
752
753         result = ((control & CONTROL_DTR) ? TIOCM_DTR : 0)
754                 |((control & CONTROL_RTS) ? TIOCM_RTS : 0)
755                 |((control & CONTROL_CTS) ? TIOCM_CTS : 0)
756                 |((control & CONTROL_DSR) ? TIOCM_DSR : 0)
757                 |((control & CONTROL_RING)? TIOCM_RI  : 0)
758                 |((control & CONTROL_DCD) ? TIOCM_CD  : 0);
759
760         dbg("%s - control = 0x%.2x", __func__, control);
761
762         return result;
763 }
764
765 static int cp210x_carrier_raised(struct usb_serial_port *p)
766 {
767         unsigned int control;
768         cp210x_get_config(p, CP210X_GET_MDMSTS, &control, 1);
769         if (control & CONTROL_DCD)
770                 return 1;
771         return 0;
772 }
773
774 static void cp210x_break_ctl (struct tty_struct *tty, int break_state)
775 {
776         struct usb_serial_port *port = tty->driver_data;
777         unsigned int state;
778
779         dbg("%s - port %d", __func__, port->number);
780         if (break_state == 0)
781                 state = BREAK_OFF;
782         else
783                 state = BREAK_ON;
784         dbg("%s - turning break %s", __func__,
785                         state == BREAK_OFF ? "off" : "on");
786         cp210x_set_config(port, CP210X_SET_BREAK, &state, 2);
787 }
788
789 static int cp210x_startup(struct usb_serial *serial)
790 {
791         /* cp210x buffers behave strangely unless device is reset */
792         usb_reset_device(serial->dev);
793         return 0;
794 }
795
796 static int __init cp210x_init(void)
797 {
798         int retval;
799
800         retval = usb_serial_register(&cp210x_device);
801         if (retval)
802                 return retval; /* Failed to register */
803
804         retval = usb_register(&cp210x_driver);
805         if (retval) {
806                 /* Failed to register */
807                 usb_serial_deregister(&cp210x_device);
808                 return retval;
809         }
810
811         /* Success */
812         printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_VERSION ":"
813                DRIVER_DESC "\n");
814         return 0;
815 }
816
817 static void __exit cp210x_exit(void)
818 {
819         usb_deregister(&cp210x_driver);
820         usb_serial_deregister(&cp210x_device);
821 }
822
823 module_init(cp210x_init);
824 module_exit(cp210x_exit);
825
826 MODULE_DESCRIPTION(DRIVER_DESC);
827 MODULE_VERSION(DRIVER_VERSION);
828 MODULE_LICENSE("GPL");
829
830 module_param(debug, bool, S_IRUGO | S_IWUSR);
831 MODULE_PARM_DESC(debug, "Enable verbose debugging messages");