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PM / sleep: Asynchronous threads for suspend_noirq
[linux/fpc-iii.git] / drivers / usb / serial / cp210x.c
blob95fa1217afdd7e8184377ead839c37815229a640
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 #define DRIVER_DESC "Silicon Labs CP210x RS232 serial adaptor driver"
28
29 /*
30 * Function Prototypes
31 */
32 static int cp210x_open(struct tty_struct *tty, struct usb_serial_port *);
33 static void cp210x_close(struct usb_serial_port *);
34 static void cp210x_get_termios(struct tty_struct *, struct usb_serial_port *);
35 static void cp210x_get_termios_port(struct usb_serial_port *port,
36 unsigned int *cflagp, unsigned int *baudp);
37 static void cp210x_change_speed(struct tty_struct *, struct usb_serial_port *,
38 struct ktermios *);
39 static void cp210x_set_termios(struct tty_struct *, struct usb_serial_port *,
40 struct ktermios*);
41 static int cp210x_tiocmget(struct tty_struct *);
42 static int cp210x_tiocmset(struct tty_struct *, unsigned int, unsigned int);
43 static int cp210x_tiocmset_port(struct usb_serial_port *port,
44 unsigned int, unsigned int);
45 static void cp210x_break_ctl(struct tty_struct *, int);
46 static int cp210x_startup(struct usb_serial *);
47 static void cp210x_release(struct usb_serial *);
48 static void cp210x_dtr_rts(struct usb_serial_port *p, int on);
49
50 static const struct usb_device_id id_table[] = {
51 { USB_DEVICE(0x045B, 0x0053) }, /* Renesas RX610 RX-Stick */
52 { USB_DEVICE(0x0471, 0x066A) }, /* AKTAKOM ACE-1001 cable */
53 { USB_DEVICE(0x0489, 0xE000) }, /* Pirelli Broadband S.p.A, DP-L10 SIP/GSM Mobile */
54 { USB_DEVICE(0x0489, 0xE003) }, /* Pirelli Broadband S.p.A, DP-L10 SIP/GSM Mobile */
55 { USB_DEVICE(0x0745, 0x1000) }, /* CipherLab USB CCD Barcode Scanner 1000 */
56 { USB_DEVICE(0x0846, 0x1100) }, /* NetGear Managed Switch M4100 series, M5300 series, M7100 series */
57 { USB_DEVICE(0x08e6, 0x5501) }, /* Gemalto Prox-PU/CU contactless smartcard reader */
58 { USB_DEVICE(0x08FD, 0x000A) }, /* Digianswer A/S , ZigBee/802.15.4 MAC Device */
59 { USB_DEVICE(0x0BED, 0x1100) }, /* MEI (TM) Cashflow-SC Bill/Voucher Acceptor */
60 { USB_DEVICE(0x0BED, 0x1101) }, /* MEI series 2000 Combo Acceptor */
61 { USB_DEVICE(0x0FCF, 0x1003) }, /* Dynastream ANT development board */
62 { USB_DEVICE(0x0FCF, 0x1004) }, /* Dynastream ANT2USB */
63 { USB_DEVICE(0x0FCF, 0x1006) }, /* Dynastream ANT development board */
64 { USB_DEVICE(0x0FDE, 0xCA05) }, /* OWL Wireless Electricity Monitor CM-160 */
65 { USB_DEVICE(0x10A6, 0xAA26) }, /* Knock-off DCU-11 cable */
66 { USB_DEVICE(0x10AB, 0x10C5) }, /* Siemens MC60 Cable */
67 { USB_DEVICE(0x10B5, 0xAC70) }, /* Nokia CA-42 USB */
68 { USB_DEVICE(0x10C4, 0x0F91) }, /* Vstabi */
69 { USB_DEVICE(0x10C4, 0x1101) }, /* Arkham Technology DS101 Bus Monitor */
70 { USB_DEVICE(0x10C4, 0x1601) }, /* Arkham Technology DS101 Adapter */
71 { USB_DEVICE(0x10C4, 0x800A) }, /* SPORTident BSM7-D-USB main station */
72 { USB_DEVICE(0x10C4, 0x803B) }, /* Pololu USB-serial converter */
73 { USB_DEVICE(0x10C4, 0x8044) }, /* Cygnal Debug Adapter */
74 { USB_DEVICE(0x10C4, 0x804E) }, /* Software Bisque Paramount ME build-in converter */
75 { USB_DEVICE(0x10C4, 0x8053) }, /* Enfora EDG1228 */
76 { USB_DEVICE(0x10C4, 0x8054) }, /* Enfora GSM2228 */
77 { USB_DEVICE(0x10C4, 0x8066) }, /* Argussoft In-System Programmer */
78 { USB_DEVICE(0x10C4, 0x806F) }, /* IMS USB to RS422 Converter Cable */
79 { USB_DEVICE(0x10C4, 0x807A) }, /* Crumb128 board */
80 { USB_DEVICE(0x10C4, 0x80C4) }, /* Cygnal Integrated Products, Inc., Optris infrared thermometer */
81 { USB_DEVICE(0x10C4, 0x80CA) }, /* Degree Controls Inc */
82 { USB_DEVICE(0x10C4, 0x80DD) }, /* Tracient RFID */
83 { USB_DEVICE(0x10C4, 0x80F6) }, /* Suunto sports instrument */
84 { USB_DEVICE(0x10C4, 0x8115) }, /* Arygon NFC/Mifare Reader */
85 { USB_DEVICE(0x10C4, 0x813D) }, /* Burnside Telecom Deskmobile */
86 { USB_DEVICE(0x10C4, 0x813F) }, /* Tams Master Easy Control */
87 { USB_DEVICE(0x10C4, 0x814A) }, /* West Mountain Radio RIGblaster P&P */
88 { USB_DEVICE(0x10C4, 0x814B) }, /* West Mountain Radio RIGtalk */
89 { USB_DEVICE(0x2405, 0x0003) }, /* West Mountain Radio RIGblaster Advantage */
90 { USB_DEVICE(0x10C4, 0x8156) }, /* B&G H3000 link cable */
91 { USB_DEVICE(0x10C4, 0x815E) }, /* Helicomm IP-Link 1220-DVM */
92 { USB_DEVICE(0x10C4, 0x815F) }, /* Timewave HamLinkUSB */
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, 0x81A9) }, /* Multiplex RC Interface */
97 { USB_DEVICE(0x10C4, 0x81AC) }, /* MSD Dash Hawk */
98 { USB_DEVICE(0x10C4, 0x81AD) }, /* INSYS USB Modem */
99 { USB_DEVICE(0x10C4, 0x81C8) }, /* Lipowsky Industrie Elektronik GmbH, Baby-JTAG */
100 { USB_DEVICE(0x10C4, 0x81E2) }, /* Lipowsky Industrie Elektronik GmbH, Baby-LIN */
101 { USB_DEVICE(0x10C4, 0x81E7) }, /* Aerocomm Radio */
102 { USB_DEVICE(0x10C4, 0x81E8) }, /* Zephyr Bioharness */
103 { USB_DEVICE(0x10C4, 0x81F2) }, /* C1007 HF band RFID controller */
104 { USB_DEVICE(0x10C4, 0x8218) }, /* Lipowsky Industrie Elektronik GmbH, HARP-1 */
105 { USB_DEVICE(0x10C4, 0x822B) }, /* Modem EDGE(GSM) Comander 2 */
106 { USB_DEVICE(0x10C4, 0x826B) }, /* Cygnal Integrated Products, Inc., Fasttrax GPS demonstration module */
107 { USB_DEVICE(0x10C4, 0x8293) }, /* Telegesis ETRX2USB */
108 { USB_DEVICE(0x10C4, 0x82F9) }, /* Procyon AVS */
109 { USB_DEVICE(0x10C4, 0x8341) }, /* Siemens MC35PU GPRS Modem */
110 { USB_DEVICE(0x10C4, 0x8382) }, /* Cygnal Integrated Products, Inc. */
111 { USB_DEVICE(0x10C4, 0x83A8) }, /* Amber Wireless AMB2560 */
112 { USB_DEVICE(0x10C4, 0x83D8) }, /* DekTec DTA Plus VHF/UHF Booster/Attenuator */
113 { USB_DEVICE(0x10C4, 0x8411) }, /* Kyocera GPS Module */
114 { USB_DEVICE(0x10C4, 0x8418) }, /* IRZ Automation Teleport SG-10 GSM/GPRS Modem */
115 { USB_DEVICE(0x10C4, 0x846E) }, /* BEI USB Sensor Interface (VCP) */
116 { USB_DEVICE(0x10C4, 0x8477) }, /* Balluff RFID */
117 { USB_DEVICE(0x10C4, 0x85EA) }, /* AC-Services IBUS-IF */
118 { USB_DEVICE(0x10C4, 0x85EB) }, /* AC-Services CIS-IBUS */
119 { USB_DEVICE(0x10C4, 0x85F8) }, /* Virtenio Preon32 */
120 { USB_DEVICE(0x10C4, 0x8664) }, /* AC-Services CAN-IF */
121 { USB_DEVICE(0x10C4, 0x8665) }, /* AC-Services OBD-IF */
122 { USB_DEVICE(0x10C4, 0x88A4) }, /* MMB Networks ZigBee USB Device */
123 { USB_DEVICE(0x10C4, 0x88A5) }, /* Planet Innovation Ingeni ZigBee USB Device */
124 { USB_DEVICE(0x10C4, 0xEA60) }, /* Silicon Labs factory default */
125 { USB_DEVICE(0x10C4, 0xEA61) }, /* Silicon Labs factory default */
126 { USB_DEVICE(0x10C4, 0xEA70) }, /* Silicon Labs factory default */
127 { USB_DEVICE(0x10C4, 0xEA80) }, /* Silicon Labs factory default */
128 { USB_DEVICE(0x10C4, 0xEA71) }, /* Infinity GPS-MIC-1 Radio Monophone */
129 { USB_DEVICE(0x10C4, 0xF001) }, /* Elan Digital Systems USBscope50 */
130 { USB_DEVICE(0x10C4, 0xF002) }, /* Elan Digital Systems USBwave12 */
131 { USB_DEVICE(0x10C4, 0xF003) }, /* Elan Digital Systems USBpulse100 */
132 { USB_DEVICE(0x10C4, 0xF004) }, /* Elan Digital Systems USBcount50 */
133 { USB_DEVICE(0x10C5, 0xEA61) }, /* Silicon Labs MobiData GPRS USB Modem */
134 { USB_DEVICE(0x10CE, 0xEA6A) }, /* Silicon Labs MobiData GPRS USB Modem 100EU */
135 { USB_DEVICE(0x13AD, 0x9999) }, /* Baltech card reader */
136 { USB_DEVICE(0x1555, 0x0004) }, /* Owen AC4 USB-RS485 Converter */
137 { USB_DEVICE(0x166A, 0x0201) }, /* Clipsal 5500PACA C-Bus Pascal Automation Controller */
138 { USB_DEVICE(0x166A, 0x0301) }, /* Clipsal 5800PC C-Bus Wireless PC Interface */
139 { USB_DEVICE(0x166A, 0x0303) }, /* Clipsal 5500PCU C-Bus USB interface */
140 { USB_DEVICE(0x166A, 0x0304) }, /* Clipsal 5000CT2 C-Bus Black and White Touchscreen */
141 { USB_DEVICE(0x166A, 0x0305) }, /* Clipsal C-5000CT2 C-Bus Spectrum Colour Touchscreen */
142 { USB_DEVICE(0x166A, 0x0401) }, /* Clipsal L51xx C-Bus Architectural Dimmer */
143 { USB_DEVICE(0x166A, 0x0101) }, /* Clipsal 5560884 C-Bus Multi-room Audio Matrix Switcher */
144 { USB_DEVICE(0x16D6, 0x0001) }, /* Jablotron serial interface */
145 { USB_DEVICE(0x16DC, 0x0010) }, /* W-IE-NE-R Plein & Baus GmbH PL512 Power Supply */
146 { USB_DEVICE(0x16DC, 0x0011) }, /* W-IE-NE-R Plein & Baus GmbH RCM Remote Control for MARATON Power Supply */
147 { USB_DEVICE(0x16DC, 0x0012) }, /* W-IE-NE-R Plein & Baus GmbH MPOD Multi Channel Power Supply */
148 { USB_DEVICE(0x16DC, 0x0015) }, /* W-IE-NE-R Plein & Baus GmbH CML Control, Monitoring and Data Logger */
149 { USB_DEVICE(0x17A8, 0x0001) }, /* Kamstrup Optical Eye/3-wire */
150 { USB_DEVICE(0x17A8, 0x0005) }, /* Kamstrup M-Bus Master MultiPort 250D */
151 { USB_DEVICE(0x17F4, 0xAAAA) }, /* Wavesense Jazz blood glucose meter */
152 { USB_DEVICE(0x1843, 0x0200) }, /* Vaisala USB Instrument Cable */
153 { USB_DEVICE(0x18EF, 0xE00F) }, /* ELV USB-I2C-Interface */
154 { USB_DEVICE(0x1ADB, 0x0001) }, /* Schweitzer Engineering C662 Cable */
155 { USB_DEVICE(0x1BE3, 0x07A6) }, /* WAGO 750-923 USB Service Cable */
156 { USB_DEVICE(0x1E29, 0x0102) }, /* Festo CPX-USB */
157 { USB_DEVICE(0x1E29, 0x0501) }, /* Festo CMSP */
158 { USB_DEVICE(0x1FB9, 0x0100) }, /* Lake Shore Model 121 Current Source */
159 { USB_DEVICE(0x1FB9, 0x0200) }, /* Lake Shore Model 218A Temperature Monitor */
160 { USB_DEVICE(0x1FB9, 0x0201) }, /* Lake Shore Model 219 Temperature Monitor */
161 { USB_DEVICE(0x1FB9, 0x0202) }, /* Lake Shore Model 233 Temperature Transmitter */
162 { USB_DEVICE(0x1FB9, 0x0203) }, /* Lake Shore Model 235 Temperature Transmitter */
163 { USB_DEVICE(0x1FB9, 0x0300) }, /* Lake Shore Model 335 Temperature Controller */
164 { USB_DEVICE(0x1FB9, 0x0301) }, /* Lake Shore Model 336 Temperature Controller */
165 { USB_DEVICE(0x1FB9, 0x0302) }, /* Lake Shore Model 350 Temperature Controller */
166 { USB_DEVICE(0x1FB9, 0x0303) }, /* Lake Shore Model 371 AC Bridge */
167 { USB_DEVICE(0x1FB9, 0x0400) }, /* Lake Shore Model 411 Handheld Gaussmeter */
168 { USB_DEVICE(0x1FB9, 0x0401) }, /* Lake Shore Model 425 Gaussmeter */
169 { USB_DEVICE(0x1FB9, 0x0402) }, /* Lake Shore Model 455A Gaussmeter */
170 { USB_DEVICE(0x1FB9, 0x0403) }, /* Lake Shore Model 475A Gaussmeter */
171 { USB_DEVICE(0x1FB9, 0x0404) }, /* Lake Shore Model 465 Three Axis Gaussmeter */
172 { USB_DEVICE(0x1FB9, 0x0600) }, /* Lake Shore Model 625A Superconducting MPS */
173 { USB_DEVICE(0x1FB9, 0x0601) }, /* Lake Shore Model 642A Magnet Power Supply */
174 { USB_DEVICE(0x1FB9, 0x0602) }, /* Lake Shore Model 648 Magnet Power Supply */
175 { USB_DEVICE(0x1FB9, 0x0700) }, /* Lake Shore Model 737 VSM Controller */
176 { USB_DEVICE(0x1FB9, 0x0701) }, /* Lake Shore Model 776 Hall Matrix */
177 { USB_DEVICE(0x3195, 0xF190) }, /* Link Instruments MSO-19 */
178 { USB_DEVICE(0x3195, 0xF280) }, /* Link Instruments MSO-28 */
179 { USB_DEVICE(0x3195, 0xF281) }, /* Link Instruments MSO-28 */
180 { USB_DEVICE(0x413C, 0x9500) }, /* DW700 GPS USB interface */
181 { } /* Terminating Entry */
182 };
183
184 MODULE_DEVICE_TABLE(usb, id_table);
185
186 struct cp210x_serial_private {
187 __u8 bInterfaceNumber;
188 };
189
190 static struct usb_serial_driver cp210x_device = {
191 .driver = {
192 .owner = THIS_MODULE,
193 .name = "cp210x",
194 },
195 .id_table = id_table,
196 .num_ports = 1,
197 .bulk_in_size = 256,
198 .bulk_out_size = 256,
199 .open = cp210x_open,
200 .close = cp210x_close,
201 .break_ctl = cp210x_break_ctl,
202 .set_termios = cp210x_set_termios,
203 .tiocmget = cp210x_tiocmget,
204 .tiocmset = cp210x_tiocmset,
205 .attach = cp210x_startup,
206 .release = cp210x_release,
207 .dtr_rts = cp210x_dtr_rts
208 };
209
210 static struct usb_serial_driver * const serial_drivers[] = {
211 &cp210x_device, NULL
212 };
213
214 /* Config request types */
215 #define REQTYPE_HOST_TO_INTERFACE 0x41
216 #define REQTYPE_INTERFACE_TO_HOST 0xc1
217 #define REQTYPE_HOST_TO_DEVICE 0x40
218 #define REQTYPE_DEVICE_TO_HOST 0xc0
219
220 /* Config request codes */
221 #define CP210X_IFC_ENABLE 0x00
222 #define CP210X_SET_BAUDDIV 0x01
223 #define CP210X_GET_BAUDDIV 0x02
224 #define CP210X_SET_LINE_CTL 0x03
225 #define CP210X_GET_LINE_CTL 0x04
226 #define CP210X_SET_BREAK 0x05
227 #define CP210X_IMM_CHAR 0x06
228 #define CP210X_SET_MHS 0x07
229 #define CP210X_GET_MDMSTS 0x08
230 #define CP210X_SET_XON 0x09
231 #define CP210X_SET_XOFF 0x0A
232 #define CP210X_SET_EVENTMASK 0x0B
233 #define CP210X_GET_EVENTMASK 0x0C
234 #define CP210X_SET_CHAR 0x0D
235 #define CP210X_GET_CHARS 0x0E
236 #define CP210X_GET_PROPS 0x0F
237 #define CP210X_GET_COMM_STATUS 0x10
238 #define CP210X_RESET 0x11
239 #define CP210X_PURGE 0x12
240 #define CP210X_SET_FLOW 0x13
241 #define CP210X_GET_FLOW 0x14
242 #define CP210X_EMBED_EVENTS 0x15
243 #define CP210X_GET_EVENTSTATE 0x16
244 #define CP210X_SET_CHARS 0x19
245 #define CP210X_GET_BAUDRATE 0x1D
246 #define CP210X_SET_BAUDRATE 0x1E
247
248 /* CP210X_IFC_ENABLE */
249 #define UART_ENABLE 0x0001
250 #define UART_DISABLE 0x0000
251
252 /* CP210X_(SET|GET)_BAUDDIV */
253 #define BAUD_RATE_GEN_FREQ 0x384000
254
255 /* CP210X_(SET|GET)_LINE_CTL */
256 #define BITS_DATA_MASK 0X0f00
257 #define BITS_DATA_5 0X0500
258 #define BITS_DATA_6 0X0600
259 #define BITS_DATA_7 0X0700
260 #define BITS_DATA_8 0X0800
261 #define BITS_DATA_9 0X0900
262
263 #define BITS_PARITY_MASK 0x00f0
264 #define BITS_PARITY_NONE 0x0000
265 #define BITS_PARITY_ODD 0x0010
266 #define BITS_PARITY_EVEN 0x0020
267 #define BITS_PARITY_MARK 0x0030
268 #define BITS_PARITY_SPACE 0x0040
269
270 #define BITS_STOP_MASK 0x000f
271 #define BITS_STOP_1 0x0000
272 #define BITS_STOP_1_5 0x0001
273 #define BITS_STOP_2 0x0002
274
275 /* CP210X_SET_BREAK */
276 #define BREAK_ON 0x0001
277 #define BREAK_OFF 0x0000
278
279 /* CP210X_(SET_MHS|GET_MDMSTS) */
280 #define CONTROL_DTR 0x0001
281 #define CONTROL_RTS 0x0002
282 #define CONTROL_CTS 0x0010
283 #define CONTROL_DSR 0x0020
284 #define CONTROL_RING 0x0040
285 #define CONTROL_DCD 0x0080
286 #define CONTROL_WRITE_DTR 0x0100
287 #define CONTROL_WRITE_RTS 0x0200
288
289 /*
290 * cp210x_get_config
291 * Reads from the CP210x configuration registers
292 * 'size' is specified in bytes.
293 * 'data' is a pointer to a pre-allocated array of integers large
294 * enough to hold 'size' bytes (with 4 bytes to each integer)
295 */
296 static int cp210x_get_config(struct usb_serial_port *port, u8 request,
297 unsigned int *data, int size)
298 {
299 struct usb_serial *serial = port->serial;
300 struct cp210x_serial_private *spriv = usb_get_serial_data(serial);
301 __le32 *buf;
302 int result, i, length;
303
304 /* Number of integers required to contain the array */
305 length = (((size - 1) | 3) + 1) / 4;
306
307 buf = kcalloc(length, sizeof(__le32), GFP_KERNEL);
308 if (!buf)
309 return -ENOMEM;
310
311 /* Issue the request, attempting to read 'size' bytes */
312 result = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
313 request, REQTYPE_INTERFACE_TO_HOST, 0x0000,
314 spriv->bInterfaceNumber, buf, size,
315 USB_CTRL_GET_TIMEOUT);
316
317 /* Convert data into an array of integers */
318 for (i = 0; i < length; i++)
319 data[i] = le32_to_cpu(buf[i]);
320
321 kfree(buf);
322
323 if (result != size) {
324 dev_dbg(&port->dev, "%s - Unable to send config request, request=0x%x size=%d result=%d\n",
325 __func__, request, size, result);
326 if (result > 0)
327 result = -EPROTO;
328
329 return result;
330 }
331
332 return 0;
333 }
334
335 /*
336 * cp210x_set_config
337 * Writes to the CP210x configuration registers
338 * Values less than 16 bits wide are sent directly
339 * 'size' is specified in bytes.
340 */
341 static int cp210x_set_config(struct usb_serial_port *port, u8 request,
342 unsigned int *data, int size)
343 {
344 struct usb_serial *serial = port->serial;
345 struct cp210x_serial_private *spriv = usb_get_serial_data(serial);
346 __le32 *buf;
347 int result, i, length;
348
349 /* Number of integers required to contain the array */
350 length = (((size - 1) | 3) + 1) / 4;
351
352 buf = kmalloc(length * sizeof(__le32), GFP_KERNEL);
353 if (!buf)
354 return -ENOMEM;
355
356 /* Array of integers into bytes */
357 for (i = 0; i < length; i++)
358 buf[i] = cpu_to_le32(data[i]);
359
360 if (size > 2) {
361 result = usb_control_msg(serial->dev,
362 usb_sndctrlpipe(serial->dev, 0),
363 request, REQTYPE_HOST_TO_INTERFACE, 0x0000,
364 spriv->bInterfaceNumber, buf, size,
365 USB_CTRL_SET_TIMEOUT);
366 } else {
367 result = usb_control_msg(serial->dev,
368 usb_sndctrlpipe(serial->dev, 0),
369 request, REQTYPE_HOST_TO_INTERFACE, data[0],
370 spriv->bInterfaceNumber, NULL, 0,
371 USB_CTRL_SET_TIMEOUT);
372 }
373
374 kfree(buf);
375
376 if ((size > 2 && result != size) || result < 0) {
377 dev_dbg(&port->dev, "%s - Unable to send request, request=0x%x size=%d result=%d\n",
378 __func__, request, size, result);
379 if (result > 0)
380 result = -EPROTO;
381
382 return result;
383 }
384
385 return 0;
386 }
387
388 /*
389 * cp210x_set_config_single
390 * Convenience function for calling cp210x_set_config on single data values
391 * without requiring an integer pointer
392 */
393 static inline int cp210x_set_config_single(struct usb_serial_port *port,
394 u8 request, unsigned int data)
395 {
396 return cp210x_set_config(port, request, &data, 2);
397 }
398
399 /*
400 * cp210x_quantise_baudrate
401 * Quantises the baud rate as per AN205 Table 1
402 */
403 static unsigned int cp210x_quantise_baudrate(unsigned int baud)
404 {
405 if (baud <= 300)
406 baud = 300;
407 else if (baud <= 600) baud = 600;
408 else if (baud <= 1200) baud = 1200;
409 else if (baud <= 1800) baud = 1800;
410 else if (baud <= 2400) baud = 2400;
411 else if (baud <= 4000) baud = 4000;
412 else if (baud <= 4803) baud = 4800;
413 else if (baud <= 7207) baud = 7200;
414 else if (baud <= 9612) baud = 9600;
415 else if (baud <= 14428) baud = 14400;
416 else if (baud <= 16062) baud = 16000;
417 else if (baud <= 19250) baud = 19200;
418 else if (baud <= 28912) baud = 28800;
419 else if (baud <= 38601) baud = 38400;
420 else if (baud <= 51558) baud = 51200;
421 else if (baud <= 56280) baud = 56000;
422 else if (baud <= 58053) baud = 57600;
423 else if (baud <= 64111) baud = 64000;
424 else if (baud <= 77608) baud = 76800;
425 else if (baud <= 117028) baud = 115200;
426 else if (baud <= 129347) baud = 128000;
427 else if (baud <= 156868) baud = 153600;
428 else if (baud <= 237832) baud = 230400;
429 else if (baud <= 254234) baud = 250000;
430 else if (baud <= 273066) baud = 256000;
431 else if (baud <= 491520) baud = 460800;
432 else if (baud <= 567138) baud = 500000;
433 else if (baud <= 670254) baud = 576000;
434 else if (baud < 1000000)
435 baud = 921600;
436 else if (baud > 2000000)
437 baud = 2000000;
438 return baud;
439 }
440
441 static int cp210x_open(struct tty_struct *tty, struct usb_serial_port *port)
442 {
443 int result;
444
445 result = cp210x_set_config_single(port, CP210X_IFC_ENABLE,
446 UART_ENABLE);
447 if (result) {
448 dev_err(&port->dev, "%s - Unable to enable UART\n", __func__);
449 return result;
450 }
451
452 /* Configure the termios structure */
453 cp210x_get_termios(tty, port);
454
455 /* The baud rate must be initialised on cp2104 */
456 if (tty)
457 cp210x_change_speed(tty, port, NULL);
458
459 return usb_serial_generic_open(tty, port);
460 }
461
462 static void cp210x_close(struct usb_serial_port *port)
463 {
464 usb_serial_generic_close(port);
465 cp210x_set_config_single(port, CP210X_IFC_ENABLE, UART_DISABLE);
466 }
467
468 /*
469 * cp210x_get_termios
470 * Reads the baud rate, data bits, parity, stop bits and flow control mode
471 * from the device, corrects any unsupported values, and configures the
472 * termios structure to reflect the state of the device
473 */
474 static void cp210x_get_termios(struct tty_struct *tty,
475 struct usb_serial_port *port)
476 {
477 unsigned int baud;
478
479 if (tty) {
480 cp210x_get_termios_port(tty->driver_data,
481 &tty->termios.c_cflag, &baud);
482 tty_encode_baud_rate(tty, baud, baud);
483 } else {
484 unsigned int cflag;
485 cflag = 0;
486 cp210x_get_termios_port(port, &cflag, &baud);
487 }
488 }
489
490 /*
491 * cp210x_get_termios_port
492 * This is the heart of cp210x_get_termios which always uses a &usb_serial_port.
493 */
494 static void cp210x_get_termios_port(struct usb_serial_port *port,
495 unsigned int *cflagp, unsigned int *baudp)
496 {
497 struct device *dev = &port->dev;
498 unsigned int cflag, modem_ctl[4];
499 unsigned int baud;
500 unsigned int bits;
501
502 cp210x_get_config(port, CP210X_GET_BAUDRATE, &baud, 4);
503
504 dev_dbg(dev, "%s - baud rate = %d\n", __func__, baud);
505 *baudp = baud;
506
507 cflag = *cflagp;
508
509 cp210x_get_config(port, CP210X_GET_LINE_CTL, &bits, 2);
510 cflag &= ~CSIZE;
511 switch (bits & BITS_DATA_MASK) {
512 case BITS_DATA_5:
513 dev_dbg(dev, "%s - data bits = 5\n", __func__);
514 cflag |= CS5;
515 break;
516 case BITS_DATA_6:
517 dev_dbg(dev, "%s - data bits = 6\n", __func__);
518 cflag |= CS6;
519 break;
520 case BITS_DATA_7:
521 dev_dbg(dev, "%s - data bits = 7\n", __func__);
522 cflag |= CS7;
523 break;
524 case BITS_DATA_8:
525 dev_dbg(dev, "%s - data bits = 8\n", __func__);
526 cflag |= CS8;
527 break;
528 case BITS_DATA_9:
529 dev_dbg(dev, "%s - data bits = 9 (not supported, using 8 data bits)\n", __func__);
530 cflag |= CS8;
531 bits &= ~BITS_DATA_MASK;
532 bits |= BITS_DATA_8;
533 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2);
534 break;
535 default:
536 dev_dbg(dev, "%s - Unknown number of data bits, using 8\n", __func__);
537 cflag |= CS8;
538 bits &= ~BITS_DATA_MASK;
539 bits |= BITS_DATA_8;
540 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2);
541 break;
542 }
543
544 switch (bits & BITS_PARITY_MASK) {
545 case BITS_PARITY_NONE:
546 dev_dbg(dev, "%s - parity = NONE\n", __func__);
547 cflag &= ~PARENB;
548 break;
549 case BITS_PARITY_ODD:
550 dev_dbg(dev, "%s - parity = ODD\n", __func__);
551 cflag |= (PARENB|PARODD);
552 break;
553 case BITS_PARITY_EVEN:
554 dev_dbg(dev, "%s - parity = EVEN\n", __func__);
555 cflag &= ~PARODD;
556 cflag |= PARENB;
557 break;
558 case BITS_PARITY_MARK:
559 dev_dbg(dev, "%s - parity = MARK\n", __func__);
560 cflag |= (PARENB|PARODD|CMSPAR);
561 break;
562 case BITS_PARITY_SPACE:
563 dev_dbg(dev, "%s - parity = SPACE\n", __func__);
564 cflag &= ~PARODD;
565 cflag |= (PARENB|CMSPAR);
566 break;
567 default:
568 dev_dbg(dev, "%s - Unknown parity mode, disabling parity\n", __func__);
569 cflag &= ~PARENB;
570 bits &= ~BITS_PARITY_MASK;
571 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2);
572 break;
573 }
574
575 cflag &= ~CSTOPB;
576 switch (bits & BITS_STOP_MASK) {
577 case BITS_STOP_1:
578 dev_dbg(dev, "%s - stop bits = 1\n", __func__);
579 break;
580 case BITS_STOP_1_5:
581 dev_dbg(dev, "%s - stop bits = 1.5 (not supported, using 1 stop bit)\n", __func__);
582 bits &= ~BITS_STOP_MASK;
583 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2);
584 break;
585 case BITS_STOP_2:
586 dev_dbg(dev, "%s - stop bits = 2\n", __func__);
587 cflag |= CSTOPB;
588 break;
589 default:
590 dev_dbg(dev, "%s - Unknown number of stop bits, using 1 stop bit\n", __func__);
591 bits &= ~BITS_STOP_MASK;
592 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2);
593 break;
594 }
595
596 cp210x_get_config(port, CP210X_GET_FLOW, modem_ctl, 16);
597 if (modem_ctl[0] & 0x0008) {
598 dev_dbg(dev, "%s - flow control = CRTSCTS\n", __func__);
599 cflag |= CRTSCTS;
600 } else {
601 dev_dbg(dev, "%s - flow control = NONE\n", __func__);
602 cflag &= ~CRTSCTS;
603 }
604
605 *cflagp = cflag;
606 }
607
608 /*
609 * CP2101 supports the following baud rates:
610 *
611 * 300, 600, 1200, 1800, 2400, 4800, 7200, 9600, 14400, 19200, 28800,
612 * 38400, 56000, 57600, 115200, 128000, 230400, 460800, 921600
613 *
614 * CP2102 and CP2103 support the following additional rates:
615 *
616 * 4000, 16000, 51200, 64000, 76800, 153600, 250000, 256000, 500000,
617 * 576000
618 *
619 * The device will map a requested rate to a supported one, but the result
620 * of requests for rates greater than 1053257 is undefined (see AN205).
621 *
622 * CP2104, CP2105 and CP2110 support most rates up to 2M, 921k and 1M baud,
623 * respectively, with an error less than 1%. The actual rates are determined
624 * by
625 *
626 * div = round(freq / (2 x prescale x request))
627 * actual = freq / (2 x prescale x div)
628 *
629 * For CP2104 and CP2105 freq is 48Mhz and prescale is 4 for request <= 365bps
630 * or 1 otherwise.
631 * For CP2110 freq is 24Mhz and prescale is 4 for request <= 300bps or 1
632 * otherwise.
633 */
634 static void cp210x_change_speed(struct tty_struct *tty,
635 struct usb_serial_port *port, struct ktermios *old_termios)
636 {
637 u32 baud;
638
639 baud = tty->termios.c_ospeed;
640
641 /* This maps the requested rate to a rate valid on cp2102 or cp2103,
642 * or to an arbitrary rate in [1M,2M].
643 *
644 * NOTE: B0 is not implemented.
645 */
646 baud = cp210x_quantise_baudrate(baud);
647
648 dev_dbg(&port->dev, "%s - setting baud rate to %u\n", __func__, baud);
649 if (cp210x_set_config(port, CP210X_SET_BAUDRATE, &baud,
650 sizeof(baud))) {
651 dev_warn(&port->dev, "failed to set baud rate to %u\n", baud);
652 if (old_termios)
653 baud = old_termios->c_ospeed;
654 else
655 baud = 9600;
656 }
657
658 tty_encode_baud_rate(tty, baud, baud);
659 }
660
661 static void cp210x_set_termios(struct tty_struct *tty,
662 struct usb_serial_port *port, struct ktermios *old_termios)
663 {
664 struct device *dev = &port->dev;
665 unsigned int cflag, old_cflag;
666 unsigned int bits;
667 unsigned int modem_ctl[4];
668
669 cflag = tty->termios.c_cflag;
670 old_cflag = old_termios->c_cflag;
671
672 if (tty->termios.c_ospeed != old_termios->c_ospeed)
673 cp210x_change_speed(tty, port, old_termios);
674
675 /* If the number of data bits is to be updated */
676 if ((cflag & CSIZE) != (old_cflag & CSIZE)) {
677 cp210x_get_config(port, CP210X_GET_LINE_CTL, &bits, 2);
678 bits &= ~BITS_DATA_MASK;
679 switch (cflag & CSIZE) {
680 case CS5:
681 bits |= BITS_DATA_5;
682 dev_dbg(dev, "%s - data bits = 5\n", __func__);
683 break;
684 case CS6:
685 bits |= BITS_DATA_6;
686 dev_dbg(dev, "%s - data bits = 6\n", __func__);
687 break;
688 case CS7:
689 bits |= BITS_DATA_7;
690 dev_dbg(dev, "%s - data bits = 7\n", __func__);
691 break;
692 case CS8:
693 bits |= BITS_DATA_8;
694 dev_dbg(dev, "%s - data bits = 8\n", __func__);
695 break;
696 /*case CS9:
697 bits |= BITS_DATA_9;
698 dev_dbg(dev, "%s - data bits = 9\n", __func__);
699 break;*/
700 default:
701 dev_dbg(dev, "cp210x driver does not support the number of bits requested, using 8 bit mode\n");
702 bits |= BITS_DATA_8;
703 break;
704 }
705 if (cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2))
706 dev_dbg(dev, "Number of data bits requested not supported by device\n");
707 }
708
709 if ((cflag & (PARENB|PARODD|CMSPAR)) !=
710 (old_cflag & (PARENB|PARODD|CMSPAR))) {
711 cp210x_get_config(port, CP210X_GET_LINE_CTL, &bits, 2);
712 bits &= ~BITS_PARITY_MASK;
713 if (cflag & PARENB) {
714 if (cflag & CMSPAR) {
715 if (cflag & PARODD) {
716 bits |= BITS_PARITY_MARK;
717 dev_dbg(dev, "%s - parity = MARK\n", __func__);
718 } else {
719 bits |= BITS_PARITY_SPACE;
720 dev_dbg(dev, "%s - parity = SPACE\n", __func__);
721 }
722 } else {
723 if (cflag & PARODD) {
724 bits |= BITS_PARITY_ODD;
725 dev_dbg(dev, "%s - parity = ODD\n", __func__);
726 } else {
727 bits |= BITS_PARITY_EVEN;
728 dev_dbg(dev, "%s - parity = EVEN\n", __func__);
729 }
730 }
731 }
732 if (cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2))
733 dev_dbg(dev, "Parity mode not supported by device\n");
734 }
735
736 if ((cflag & CSTOPB) != (old_cflag & CSTOPB)) {
737 cp210x_get_config(port, CP210X_GET_LINE_CTL, &bits, 2);
738 bits &= ~BITS_STOP_MASK;
739 if (cflag & CSTOPB) {
740 bits |= BITS_STOP_2;
741 dev_dbg(dev, "%s - stop bits = 2\n", __func__);
742 } else {
743 bits |= BITS_STOP_1;
744 dev_dbg(dev, "%s - stop bits = 1\n", __func__);
745 }
746 if (cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2))
747 dev_dbg(dev, "Number of stop bits requested not supported by device\n");
748 }
749
750 if ((cflag & CRTSCTS) != (old_cflag & CRTSCTS)) {
751 cp210x_get_config(port, CP210X_GET_FLOW, modem_ctl, 16);
752 dev_dbg(dev, "%s - read modem controls = 0x%.4x 0x%.4x 0x%.4x 0x%.4x\n",
753 __func__, modem_ctl[0], modem_ctl[1],
754 modem_ctl[2], modem_ctl[3]);
755
756 if (cflag & CRTSCTS) {
757 modem_ctl[0] &= ~0x7B;
758 modem_ctl[0] |= 0x09;
759 modem_ctl[1] = 0x80;
760 dev_dbg(dev, "%s - flow control = CRTSCTS\n", __func__);
761 } else {
762 modem_ctl[0] &= ~0x7B;
763 modem_ctl[0] |= 0x01;
764 modem_ctl[1] |= 0x40;
765 dev_dbg(dev, "%s - flow control = NONE\n", __func__);
766 }
767
768 dev_dbg(dev, "%s - write modem controls = 0x%.4x 0x%.4x 0x%.4x 0x%.4x\n",
769 __func__, modem_ctl[0], modem_ctl[1],
770 modem_ctl[2], modem_ctl[3]);
771 cp210x_set_config(port, CP210X_SET_FLOW, modem_ctl, 16);
772 }
773
774 }
775
776 static int cp210x_tiocmset(struct tty_struct *tty,
777 unsigned int set, unsigned int clear)
778 {
779 struct usb_serial_port *port = tty->driver_data;
780 return cp210x_tiocmset_port(port, set, clear);
781 }
782
783 static int cp210x_tiocmset_port(struct usb_serial_port *port,
784 unsigned int set, unsigned int clear)
785 {
786 unsigned int control = 0;
787
788 if (set & TIOCM_RTS) {
789 control |= CONTROL_RTS;
790 control |= CONTROL_WRITE_RTS;
791 }
792 if (set & TIOCM_DTR) {
793 control |= CONTROL_DTR;
794 control |= CONTROL_WRITE_DTR;
795 }
796 if (clear & TIOCM_RTS) {
797 control &= ~CONTROL_RTS;
798 control |= CONTROL_WRITE_RTS;
799 }
800 if (clear & TIOCM_DTR) {
801 control &= ~CONTROL_DTR;
802 control |= CONTROL_WRITE_DTR;
803 }
804
805 dev_dbg(&port->dev, "%s - control = 0x%.4x\n", __func__, control);
806
807 return cp210x_set_config(port, CP210X_SET_MHS, &control, 2);
808 }
809
810 static void cp210x_dtr_rts(struct usb_serial_port *p, int on)
811 {
812 if (on)
813 cp210x_tiocmset_port(p, TIOCM_DTR|TIOCM_RTS, 0);
814 else
815 cp210x_tiocmset_port(p, 0, TIOCM_DTR|TIOCM_RTS);
816 }
817
818 static int cp210x_tiocmget(struct tty_struct *tty)
819 {
820 struct usb_serial_port *port = tty->driver_data;
821 unsigned int control;
822 int result;
823
824 cp210x_get_config(port, CP210X_GET_MDMSTS, &control, 1);
825
826 result = ((control & CONTROL_DTR) ? TIOCM_DTR : 0)
827 |((control & CONTROL_RTS) ? TIOCM_RTS : 0)
828 |((control & CONTROL_CTS) ? TIOCM_CTS : 0)
829 |((control & CONTROL_DSR) ? TIOCM_DSR : 0)
830 |((control & CONTROL_RING)? TIOCM_RI : 0)
831 |((control & CONTROL_DCD) ? TIOCM_CD : 0);
832
833 dev_dbg(&port->dev, "%s - control = 0x%.2x\n", __func__, control);
834
835 return result;
836 }
837
838 static void cp210x_break_ctl(struct tty_struct *tty, int break_state)
839 {
840 struct usb_serial_port *port = tty->driver_data;
841 unsigned int state;
842
843 if (break_state == 0)
844 state = BREAK_OFF;
845 else
846 state = BREAK_ON;
847 dev_dbg(&port->dev, "%s - turning break %s\n", __func__,
848 state == BREAK_OFF ? "off" : "on");
849 cp210x_set_config(port, CP210X_SET_BREAK, &state, 2);
850 }
851
852 static int cp210x_startup(struct usb_serial *serial)
853 {
854 struct usb_host_interface *cur_altsetting;
855 struct cp210x_serial_private *spriv;
856
857 /* cp210x buffers behave strangely unless device is reset */
858 usb_reset_device(serial->dev);
859
860 spriv = kzalloc(sizeof(*spriv), GFP_KERNEL);
861 if (!spriv)
862 return -ENOMEM;
863
864 cur_altsetting = serial->interface->cur_altsetting;
865 spriv->bInterfaceNumber = cur_altsetting->desc.bInterfaceNumber;
866
867 usb_set_serial_data(serial, spriv);
868
869 return 0;
870 }
871
872 static void cp210x_release(struct usb_serial *serial)
873 {
874 struct cp210x_serial_private *spriv;
875
876 spriv = usb_get_serial_data(serial);
877 kfree(spriv);
878 }
879
880 module_usb_serial_driver(serial_drivers, id_table);
881
882 MODULE_DESCRIPTION(DRIVER_DESC);
883 MODULE_LICENSE("GPL");
Linux with added FPC-III support