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Linux 4.2.1
[linux/fpc-iii.git] / drivers / usb / serial / cp210x.c
blobeac7ccaa3c859cc3bae90e897fc071caa7168cfd
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(0x0908, 0x01FF) }, /* Siemens RUGGEDCOM USB Serial Console */
60 { USB_DEVICE(0x0BED, 0x1100) }, /* MEI (TM) Cashflow-SC Bill/Voucher Acceptor */
61 { USB_DEVICE(0x0BED, 0x1101) }, /* MEI series 2000 Combo Acceptor */
62 { USB_DEVICE(0x0FCF, 0x1003) }, /* Dynastream ANT development board */
63 { USB_DEVICE(0x0FCF, 0x1004) }, /* Dynastream ANT2USB */
64 { USB_DEVICE(0x0FCF, 0x1006) }, /* Dynastream ANT development board */
65 { USB_DEVICE(0x0FDE, 0xCA05) }, /* OWL Wireless Electricity Monitor CM-160 */
66 { USB_DEVICE(0x10A6, 0xAA26) }, /* Knock-off DCU-11 cable */
67 { USB_DEVICE(0x10AB, 0x10C5) }, /* Siemens MC60 Cable */
68 { USB_DEVICE(0x10B5, 0xAC70) }, /* Nokia CA-42 USB */
69 { USB_DEVICE(0x10C4, 0x0F91) }, /* Vstabi */
70 { USB_DEVICE(0x10C4, 0x1101) }, /* Arkham Technology DS101 Bus Monitor */
71 { USB_DEVICE(0x10C4, 0x1601) }, /* Arkham Technology DS101 Adapter */
72 { USB_DEVICE(0x10C4, 0x800A) }, /* SPORTident BSM7-D-USB main station */
73 { USB_DEVICE(0x10C4, 0x803B) }, /* Pololu USB-serial converter */
74 { USB_DEVICE(0x10C4, 0x8044) }, /* Cygnal Debug Adapter */
75 { USB_DEVICE(0x10C4, 0x804E) }, /* Software Bisque Paramount ME build-in converter */
76 { USB_DEVICE(0x10C4, 0x8053) }, /* Enfora EDG1228 */
77 { USB_DEVICE(0x10C4, 0x8054) }, /* Enfora GSM2228 */
78 { USB_DEVICE(0x10C4, 0x8066) }, /* Argussoft In-System Programmer */
79 { USB_DEVICE(0x10C4, 0x806F) }, /* IMS USB to RS422 Converter Cable */
80 { USB_DEVICE(0x10C4, 0x807A) }, /* Crumb128 board */
81 { USB_DEVICE(0x10C4, 0x80C4) }, /* Cygnal Integrated Products, Inc., Optris infrared thermometer */
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, 0x814A) }, /* West Mountain Radio RIGblaster P&P */
89 { USB_DEVICE(0x10C4, 0x814B) }, /* West Mountain Radio RIGtalk */
90 { USB_DEVICE(0x2405, 0x0003) }, /* West Mountain Radio RIGblaster Advantage */
91 { USB_DEVICE(0x10C4, 0x8156) }, /* B&G H3000 link cable */
92 { USB_DEVICE(0x10C4, 0x815E) }, /* Helicomm IP-Link 1220-DVM */
93 { USB_DEVICE(0x10C4, 0x815F) }, /* Timewave HamLinkUSB */
94 { USB_DEVICE(0x10C4, 0x818B) }, /* AVIT Research USB to TTL */
95 { USB_DEVICE(0x10C4, 0x819F) }, /* MJS USB Toslink Switcher */
96 { USB_DEVICE(0x10C4, 0x81A6) }, /* ThinkOptics WavIt */
97 { USB_DEVICE(0x10C4, 0x81A9) }, /* Multiplex RC Interface */
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 demonstration module */
108 { USB_DEVICE(0x10C4, 0x8281) }, /* Nanotec Plug & Drive */
109 { USB_DEVICE(0x10C4, 0x8293) }, /* Telegesis ETRX2USB */
110 { USB_DEVICE(0x10C4, 0x82F9) }, /* Procyon AVS */
111 { USB_DEVICE(0x10C4, 0x8341) }, /* Siemens MC35PU GPRS Modem */
112 { USB_DEVICE(0x10C4, 0x8382) }, /* Cygnal Integrated Products, Inc. */
113 { USB_DEVICE(0x10C4, 0x83A8) }, /* Amber Wireless AMB2560 */
114 { USB_DEVICE(0x10C4, 0x83D8) }, /* DekTec DTA Plus VHF/UHF Booster/Attenuator */
115 { USB_DEVICE(0x10C4, 0x8411) }, /* Kyocera GPS Module */
116 { USB_DEVICE(0x10C4, 0x8418) }, /* IRZ Automation Teleport SG-10 GSM/GPRS Modem */
117 { USB_DEVICE(0x10C4, 0x846E) }, /* BEI USB Sensor Interface (VCP) */
118 { USB_DEVICE(0x10C4, 0x8477) }, /* Balluff RFID */
119 { USB_DEVICE(0x10C4, 0x85EA) }, /* AC-Services IBUS-IF */
120 { USB_DEVICE(0x10C4, 0x85EB) }, /* AC-Services CIS-IBUS */
121 { USB_DEVICE(0x10C4, 0x85F8) }, /* Virtenio Preon32 */
122 { USB_DEVICE(0x10C4, 0x8664) }, /* AC-Services CAN-IF */
123 { USB_DEVICE(0x10C4, 0x8665) }, /* AC-Services OBD-IF */
124 { USB_DEVICE(0x10C4, 0x8856) }, /* CEL EM357 ZigBee USB Stick - LR */
125 { USB_DEVICE(0x10C4, 0x8857) }, /* CEL EM357 ZigBee USB Stick */
126 { USB_DEVICE(0x10C4, 0x88A4) }, /* MMB Networks ZigBee USB Device */
127 { USB_DEVICE(0x10C4, 0x88A5) }, /* Planet Innovation Ingeni ZigBee USB Device */
128 { USB_DEVICE(0x10C4, 0x8946) }, /* Ketra N1 Wireless Interface */
129 { USB_DEVICE(0x10C4, 0x8977) }, /* CEL MeshWorks DevKit Device */
130 { USB_DEVICE(0x10C4, 0x8998) }, /* KCF Technologies PRN */
131 { USB_DEVICE(0x10C4, 0x8A2A) }, /* HubZ dual ZigBee and Z-Wave dongle */
132 { USB_DEVICE(0x10C4, 0xEA60) }, /* Silicon Labs factory default */
133 { USB_DEVICE(0x10C4, 0xEA61) }, /* Silicon Labs factory default */
134 { USB_DEVICE(0x10C4, 0xEA70) }, /* Silicon Labs factory default */
135 { USB_DEVICE(0x10C4, 0xEA80) }, /* Silicon Labs factory default */
136 { USB_DEVICE(0x10C4, 0xEA71) }, /* Infinity GPS-MIC-1 Radio Monophone */
137 { USB_DEVICE(0x10C4, 0xF001) }, /* Elan Digital Systems USBscope50 */
138 { USB_DEVICE(0x10C4, 0xF002) }, /* Elan Digital Systems USBwave12 */
139 { USB_DEVICE(0x10C4, 0xF003) }, /* Elan Digital Systems USBpulse100 */
140 { USB_DEVICE(0x10C4, 0xF004) }, /* Elan Digital Systems USBcount50 */
141 { USB_DEVICE(0x10C5, 0xEA61) }, /* Silicon Labs MobiData GPRS USB Modem */
142 { USB_DEVICE(0x10CE, 0xEA6A) }, /* Silicon Labs MobiData GPRS USB Modem 100EU */
143 { USB_DEVICE(0x13AD, 0x9999) }, /* Baltech card reader */
144 { USB_DEVICE(0x1555, 0x0004) }, /* Owen AC4 USB-RS485 Converter */
145 { USB_DEVICE(0x166A, 0x0201) }, /* Clipsal 5500PACA C-Bus Pascal Automation Controller */
146 { USB_DEVICE(0x166A, 0x0301) }, /* Clipsal 5800PC C-Bus Wireless PC Interface */
147 { USB_DEVICE(0x166A, 0x0303) }, /* Clipsal 5500PCU C-Bus USB interface */
148 { USB_DEVICE(0x166A, 0x0304) }, /* Clipsal 5000CT2 C-Bus Black and White Touchscreen */
149 { USB_DEVICE(0x166A, 0x0305) }, /* Clipsal C-5000CT2 C-Bus Spectrum Colour Touchscreen */
150 { USB_DEVICE(0x166A, 0x0401) }, /* Clipsal L51xx C-Bus Architectural Dimmer */
151 { USB_DEVICE(0x166A, 0x0101) }, /* Clipsal 5560884 C-Bus Multi-room Audio Matrix Switcher */
152 { USB_DEVICE(0x16C0, 0x09B0) }, /* Lunatico Seletek */
153 { USB_DEVICE(0x16C0, 0x09B1) }, /* Lunatico Seletek */
154 { USB_DEVICE(0x16D6, 0x0001) }, /* Jablotron serial interface */
155 { USB_DEVICE(0x16DC, 0x0010) }, /* W-IE-NE-R Plein & Baus GmbH PL512 Power Supply */
156 { USB_DEVICE(0x16DC, 0x0011) }, /* W-IE-NE-R Plein & Baus GmbH RCM Remote Control for MARATON Power Supply */
157 { USB_DEVICE(0x16DC, 0x0012) }, /* W-IE-NE-R Plein & Baus GmbH MPOD Multi Channel Power Supply */
158 { USB_DEVICE(0x16DC, 0x0015) }, /* W-IE-NE-R Plein & Baus GmbH CML Control, Monitoring and Data Logger */
159 { USB_DEVICE(0x17A8, 0x0001) }, /* Kamstrup Optical Eye/3-wire */
160 { USB_DEVICE(0x17A8, 0x0005) }, /* Kamstrup M-Bus Master MultiPort 250D */
161 { USB_DEVICE(0x17F4, 0xAAAA) }, /* Wavesense Jazz blood glucose meter */
162 { USB_DEVICE(0x1843, 0x0200) }, /* Vaisala USB Instrument Cable */
163 { USB_DEVICE(0x18EF, 0xE00F) }, /* ELV USB-I2C-Interface */
164 { USB_DEVICE(0x1ADB, 0x0001) }, /* Schweitzer Engineering C662 Cable */
165 { USB_DEVICE(0x1B1C, 0x1C00) }, /* Corsair USB Dongle */
166 { USB_DEVICE(0x1BA4, 0x0002) }, /* Silicon Labs 358x factory default */
167 { USB_DEVICE(0x1BE3, 0x07A6) }, /* WAGO 750-923 USB Service Cable */
168 { USB_DEVICE(0x1D6F, 0x0010) }, /* Seluxit ApS RF Dongle */
169 { USB_DEVICE(0x1E29, 0x0102) }, /* Festo CPX-USB */
170 { USB_DEVICE(0x1E29, 0x0501) }, /* Festo CMSP */
171 { USB_DEVICE(0x1FB9, 0x0100) }, /* Lake Shore Model 121 Current Source */
172 { USB_DEVICE(0x1FB9, 0x0200) }, /* Lake Shore Model 218A Temperature Monitor */
173 { USB_DEVICE(0x1FB9, 0x0201) }, /* Lake Shore Model 219 Temperature Monitor */
174 { USB_DEVICE(0x1FB9, 0x0202) }, /* Lake Shore Model 233 Temperature Transmitter */
175 { USB_DEVICE(0x1FB9, 0x0203) }, /* Lake Shore Model 235 Temperature Transmitter */
176 { USB_DEVICE(0x1FB9, 0x0300) }, /* Lake Shore Model 335 Temperature Controller */
177 { USB_DEVICE(0x1FB9, 0x0301) }, /* Lake Shore Model 336 Temperature Controller */
178 { USB_DEVICE(0x1FB9, 0x0302) }, /* Lake Shore Model 350 Temperature Controller */
179 { USB_DEVICE(0x1FB9, 0x0303) }, /* Lake Shore Model 371 AC Bridge */
180 { USB_DEVICE(0x1FB9, 0x0400) }, /* Lake Shore Model 411 Handheld Gaussmeter */
181 { USB_DEVICE(0x1FB9, 0x0401) }, /* Lake Shore Model 425 Gaussmeter */
182 { USB_DEVICE(0x1FB9, 0x0402) }, /* Lake Shore Model 455A Gaussmeter */
183 { USB_DEVICE(0x1FB9, 0x0403) }, /* Lake Shore Model 475A Gaussmeter */
184 { USB_DEVICE(0x1FB9, 0x0404) }, /* Lake Shore Model 465 Three Axis Gaussmeter */
185 { USB_DEVICE(0x1FB9, 0x0600) }, /* Lake Shore Model 625A Superconducting MPS */
186 { USB_DEVICE(0x1FB9, 0x0601) }, /* Lake Shore Model 642A Magnet Power Supply */
187 { USB_DEVICE(0x1FB9, 0x0602) }, /* Lake Shore Model 648 Magnet Power Supply */
188 { USB_DEVICE(0x1FB9, 0x0700) }, /* Lake Shore Model 737 VSM Controller */
189 { USB_DEVICE(0x1FB9, 0x0701) }, /* Lake Shore Model 776 Hall Matrix */
190 { USB_DEVICE(0x2626, 0xEA60) }, /* Aruba Networks 7xxx USB Serial Console */
191 { USB_DEVICE(0x3195, 0xF190) }, /* Link Instruments MSO-19 */
192 { USB_DEVICE(0x3195, 0xF280) }, /* Link Instruments MSO-28 */
193 { USB_DEVICE(0x3195, 0xF281) }, /* Link Instruments MSO-28 */
194 { USB_DEVICE(0x413C, 0x9500) }, /* DW700 GPS USB interface */
195 { } /* Terminating Entry */
196 };
197
198 MODULE_DEVICE_TABLE(usb, id_table);
199
200 struct cp210x_serial_private {
201 __u8 bInterfaceNumber;
202 };
203
204 static struct usb_serial_driver cp210x_device = {
205 .driver = {
206 .owner = THIS_MODULE,
207 .name = "cp210x",
208 },
209 .id_table = id_table,
210 .num_ports = 1,
211 .bulk_in_size = 256,
212 .bulk_out_size = 256,
213 .open = cp210x_open,
214 .close = cp210x_close,
215 .break_ctl = cp210x_break_ctl,
216 .set_termios = cp210x_set_termios,
217 .tiocmget = cp210x_tiocmget,
218 .tiocmset = cp210x_tiocmset,
219 .attach = cp210x_startup,
220 .release = cp210x_release,
221 .dtr_rts = cp210x_dtr_rts
222 };
223
224 static struct usb_serial_driver * const serial_drivers[] = {
225 &cp210x_device, NULL
226 };
227
228 /* Config request types */
229 #define REQTYPE_HOST_TO_INTERFACE 0x41
230 #define REQTYPE_INTERFACE_TO_HOST 0xc1
231 #define REQTYPE_HOST_TO_DEVICE 0x40
232 #define REQTYPE_DEVICE_TO_HOST 0xc0
233
234 /* Config request codes */
235 #define CP210X_IFC_ENABLE 0x00
236 #define CP210X_SET_BAUDDIV 0x01
237 #define CP210X_GET_BAUDDIV 0x02
238 #define CP210X_SET_LINE_CTL 0x03
239 #define CP210X_GET_LINE_CTL 0x04
240 #define CP210X_SET_BREAK 0x05
241 #define CP210X_IMM_CHAR 0x06
242 #define CP210X_SET_MHS 0x07
243 #define CP210X_GET_MDMSTS 0x08
244 #define CP210X_SET_XON 0x09
245 #define CP210X_SET_XOFF 0x0A
246 #define CP210X_SET_EVENTMASK 0x0B
247 #define CP210X_GET_EVENTMASK 0x0C
248 #define CP210X_SET_CHAR 0x0D
249 #define CP210X_GET_CHARS 0x0E
250 #define CP210X_GET_PROPS 0x0F
251 #define CP210X_GET_COMM_STATUS 0x10
252 #define CP210X_RESET 0x11
253 #define CP210X_PURGE 0x12
254 #define CP210X_SET_FLOW 0x13
255 #define CP210X_GET_FLOW 0x14
256 #define CP210X_EMBED_EVENTS 0x15
257 #define CP210X_GET_EVENTSTATE 0x16
258 #define CP210X_SET_CHARS 0x19
259 #define CP210X_GET_BAUDRATE 0x1D
260 #define CP210X_SET_BAUDRATE 0x1E
261
262 /* CP210X_IFC_ENABLE */
263 #define UART_ENABLE 0x0001
264 #define UART_DISABLE 0x0000
265
266 /* CP210X_(SET|GET)_BAUDDIV */
267 #define BAUD_RATE_GEN_FREQ 0x384000
268
269 /* CP210X_(SET|GET)_LINE_CTL */
270 #define BITS_DATA_MASK 0X0f00
271 #define BITS_DATA_5 0X0500
272 #define BITS_DATA_6 0X0600
273 #define BITS_DATA_7 0X0700
274 #define BITS_DATA_8 0X0800
275 #define BITS_DATA_9 0X0900
276
277 #define BITS_PARITY_MASK 0x00f0
278 #define BITS_PARITY_NONE 0x0000
279 #define BITS_PARITY_ODD 0x0010
280 #define BITS_PARITY_EVEN 0x0020
281 #define BITS_PARITY_MARK 0x0030
282 #define BITS_PARITY_SPACE 0x0040
283
284 #define BITS_STOP_MASK 0x000f
285 #define BITS_STOP_1 0x0000
286 #define BITS_STOP_1_5 0x0001
287 #define BITS_STOP_2 0x0002
288
289 /* CP210X_SET_BREAK */
290 #define BREAK_ON 0x0001
291 #define BREAK_OFF 0x0000
292
293 /* CP210X_(SET_MHS|GET_MDMSTS) */
294 #define CONTROL_DTR 0x0001
295 #define CONTROL_RTS 0x0002
296 #define CONTROL_CTS 0x0010
297 #define CONTROL_DSR 0x0020
298 #define CONTROL_RING 0x0040
299 #define CONTROL_DCD 0x0080
300 #define CONTROL_WRITE_DTR 0x0100
301 #define CONTROL_WRITE_RTS 0x0200
302
303 /*
304 * cp210x_get_config
305 * Reads from the CP210x configuration registers
306 * 'size' is specified in bytes.
307 * 'data' is a pointer to a pre-allocated array of integers large
308 * enough to hold 'size' bytes (with 4 bytes to each integer)
309 */
310 static int cp210x_get_config(struct usb_serial_port *port, u8 request,
311 unsigned int *data, int size)
312 {
313 struct usb_serial *serial = port->serial;
314 struct cp210x_serial_private *spriv = usb_get_serial_data(serial);
315 __le32 *buf;
316 int result, i, length;
317
318 /* Number of integers required to contain the array */
319 length = (((size - 1) | 3) + 1) / 4;
320
321 buf = kcalloc(length, sizeof(__le32), GFP_KERNEL);
322 if (!buf)
323 return -ENOMEM;
324
325 /* Issue the request, attempting to read 'size' bytes */
326 result = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
327 request, REQTYPE_INTERFACE_TO_HOST, 0x0000,
328 spriv->bInterfaceNumber, buf, size,
329 USB_CTRL_GET_TIMEOUT);
330
331 /* Convert data into an array of integers */
332 for (i = 0; i < length; i++)
333 data[i] = le32_to_cpu(buf[i]);
334
335 kfree(buf);
336
337 if (result != size) {
338 dev_dbg(&port->dev, "%s - Unable to send config request, request=0x%x size=%d result=%d\n",
339 __func__, request, size, result);
340 if (result > 0)
341 result = -EPROTO;
342
343 return result;
344 }
345
346 return 0;
347 }
348
349 /*
350 * cp210x_set_config
351 * Writes to the CP210x configuration registers
352 * Values less than 16 bits wide are sent directly
353 * 'size' is specified in bytes.
354 */
355 static int cp210x_set_config(struct usb_serial_port *port, u8 request,
356 unsigned int *data, int size)
357 {
358 struct usb_serial *serial = port->serial;
359 struct cp210x_serial_private *spriv = usb_get_serial_data(serial);
360 __le32 *buf;
361 int result, i, length;
362
363 /* Number of integers required to contain the array */
364 length = (((size - 1) | 3) + 1) / 4;
365
366 buf = kmalloc(length * sizeof(__le32), GFP_KERNEL);
367 if (!buf)
368 return -ENOMEM;
369
370 /* Array of integers into bytes */
371 for (i = 0; i < length; i++)
372 buf[i] = cpu_to_le32(data[i]);
373
374 if (size > 2) {
375 result = usb_control_msg(serial->dev,
376 usb_sndctrlpipe(serial->dev, 0),
377 request, REQTYPE_HOST_TO_INTERFACE, 0x0000,
378 spriv->bInterfaceNumber, buf, size,
379 USB_CTRL_SET_TIMEOUT);
380 } else {
381 result = usb_control_msg(serial->dev,
382 usb_sndctrlpipe(serial->dev, 0),
383 request, REQTYPE_HOST_TO_INTERFACE, data[0],
384 spriv->bInterfaceNumber, NULL, 0,
385 USB_CTRL_SET_TIMEOUT);
386 }
387
388 kfree(buf);
389
390 if ((size > 2 && result != size) || result < 0) {
391 dev_dbg(&port->dev, "%s - Unable to send request, request=0x%x size=%d result=%d\n",
392 __func__, request, size, result);
393 if (result > 0)
394 result = -EPROTO;
395
396 return result;
397 }
398
399 return 0;
400 }
401
402 /*
403 * cp210x_set_config_single
404 * Convenience function for calling cp210x_set_config on single data values
405 * without requiring an integer pointer
406 */
407 static inline int cp210x_set_config_single(struct usb_serial_port *port,
408 u8 request, unsigned int data)
409 {
410 return cp210x_set_config(port, request, &data, 2);
411 }
412
413 /*
414 * cp210x_quantise_baudrate
415 * Quantises the baud rate as per AN205 Table 1
416 */
417 static unsigned int cp210x_quantise_baudrate(unsigned int baud)
418 {
419 if (baud <= 300)
420 baud = 300;
421 else if (baud <= 600) baud = 600;
422 else if (baud <= 1200) baud = 1200;
423 else if (baud <= 1800) baud = 1800;
424 else if (baud <= 2400) baud = 2400;
425 else if (baud <= 4000) baud = 4000;
426 else if (baud <= 4803) baud = 4800;
427 else if (baud <= 7207) baud = 7200;
428 else if (baud <= 9612) baud = 9600;
429 else if (baud <= 14428) baud = 14400;
430 else if (baud <= 16062) baud = 16000;
431 else if (baud <= 19250) baud = 19200;
432 else if (baud <= 28912) baud = 28800;
433 else if (baud <= 38601) baud = 38400;
434 else if (baud <= 51558) baud = 51200;
435 else if (baud <= 56280) baud = 56000;
436 else if (baud <= 58053) baud = 57600;
437 else if (baud <= 64111) baud = 64000;
438 else if (baud <= 77608) baud = 76800;
439 else if (baud <= 117028) baud = 115200;
440 else if (baud <= 129347) baud = 128000;
441 else if (baud <= 156868) baud = 153600;
442 else if (baud <= 237832) baud = 230400;
443 else if (baud <= 254234) baud = 250000;
444 else if (baud <= 273066) baud = 256000;
445 else if (baud <= 491520) baud = 460800;
446 else if (baud <= 567138) baud = 500000;
447 else if (baud <= 670254) baud = 576000;
448 else if (baud < 1000000)
449 baud = 921600;
450 else if (baud > 2000000)
451 baud = 2000000;
452 return baud;
453 }
454
455 static int cp210x_open(struct tty_struct *tty, struct usb_serial_port *port)
456 {
457 int result;
458
459 result = cp210x_set_config_single(port, CP210X_IFC_ENABLE,
460 UART_ENABLE);
461 if (result) {
462 dev_err(&port->dev, "%s - Unable to enable UART\n", __func__);
463 return result;
464 }
465
466 /* Configure the termios structure */
467 cp210x_get_termios(tty, port);
468
469 /* The baud rate must be initialised on cp2104 */
470 if (tty)
471 cp210x_change_speed(tty, port, NULL);
472
473 return usb_serial_generic_open(tty, port);
474 }
475
476 static void cp210x_close(struct usb_serial_port *port)
477 {
478 usb_serial_generic_close(port);
479 cp210x_set_config_single(port, CP210X_IFC_ENABLE, UART_DISABLE);
480 }
481
482 /*
483 * cp210x_get_termios
484 * Reads the baud rate, data bits, parity, stop bits and flow control mode
485 * from the device, corrects any unsupported values, and configures the
486 * termios structure to reflect the state of the device
487 */
488 static void cp210x_get_termios(struct tty_struct *tty,
489 struct usb_serial_port *port)
490 {
491 unsigned int baud;
492
493 if (tty) {
494 cp210x_get_termios_port(tty->driver_data,
495 &tty->termios.c_cflag, &baud);
496 tty_encode_baud_rate(tty, baud, baud);
497 } else {
498 unsigned int cflag;
499 cflag = 0;
500 cp210x_get_termios_port(port, &cflag, &baud);
501 }
502 }
503
504 /*
505 * cp210x_get_termios_port
506 * This is the heart of cp210x_get_termios which always uses a &usb_serial_port.
507 */
508 static void cp210x_get_termios_port(struct usb_serial_port *port,
509 unsigned int *cflagp, unsigned int *baudp)
510 {
511 struct device *dev = &port->dev;
512 unsigned int cflag, modem_ctl[4];
513 unsigned int baud;
514 unsigned int bits;
515
516 cp210x_get_config(port, CP210X_GET_BAUDRATE, &baud, 4);
517
518 dev_dbg(dev, "%s - baud rate = %d\n", __func__, baud);
519 *baudp = baud;
520
521 cflag = *cflagp;
522
523 cp210x_get_config(port, CP210X_GET_LINE_CTL, &bits, 2);
524 cflag &= ~CSIZE;
525 switch (bits & BITS_DATA_MASK) {
526 case BITS_DATA_5:
527 dev_dbg(dev, "%s - data bits = 5\n", __func__);
528 cflag |= CS5;
529 break;
530 case BITS_DATA_6:
531 dev_dbg(dev, "%s - data bits = 6\n", __func__);
532 cflag |= CS6;
533 break;
534 case BITS_DATA_7:
535 dev_dbg(dev, "%s - data bits = 7\n", __func__);
536 cflag |= CS7;
537 break;
538 case BITS_DATA_8:
539 dev_dbg(dev, "%s - data bits = 8\n", __func__);
540 cflag |= CS8;
541 break;
542 case BITS_DATA_9:
543 dev_dbg(dev, "%s - data bits = 9 (not supported, using 8 data bits)\n", __func__);
544 cflag |= CS8;
545 bits &= ~BITS_DATA_MASK;
546 bits |= BITS_DATA_8;
547 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2);
548 break;
549 default:
550 dev_dbg(dev, "%s - Unknown number of data bits, using 8\n", __func__);
551 cflag |= CS8;
552 bits &= ~BITS_DATA_MASK;
553 bits |= BITS_DATA_8;
554 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2);
555 break;
556 }
557
558 switch (bits & BITS_PARITY_MASK) {
559 case BITS_PARITY_NONE:
560 dev_dbg(dev, "%s - parity = NONE\n", __func__);
561 cflag &= ~PARENB;
562 break;
563 case BITS_PARITY_ODD:
564 dev_dbg(dev, "%s - parity = ODD\n", __func__);
565 cflag |= (PARENB|PARODD);
566 break;
567 case BITS_PARITY_EVEN:
568 dev_dbg(dev, "%s - parity = EVEN\n", __func__);
569 cflag &= ~PARODD;
570 cflag |= PARENB;
571 break;
572 case BITS_PARITY_MARK:
573 dev_dbg(dev, "%s - parity = MARK\n", __func__);
574 cflag |= (PARENB|PARODD|CMSPAR);
575 break;
576 case BITS_PARITY_SPACE:
577 dev_dbg(dev, "%s - parity = SPACE\n", __func__);
578 cflag &= ~PARODD;
579 cflag |= (PARENB|CMSPAR);
580 break;
581 default:
582 dev_dbg(dev, "%s - Unknown parity mode, disabling parity\n", __func__);
583 cflag &= ~PARENB;
584 bits &= ~BITS_PARITY_MASK;
585 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2);
586 break;
587 }
588
589 cflag &= ~CSTOPB;
590 switch (bits & BITS_STOP_MASK) {
591 case BITS_STOP_1:
592 dev_dbg(dev, "%s - stop bits = 1\n", __func__);
593 break;
594 case BITS_STOP_1_5:
595 dev_dbg(dev, "%s - stop bits = 1.5 (not supported, using 1 stop bit)\n", __func__);
596 bits &= ~BITS_STOP_MASK;
597 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2);
598 break;
599 case BITS_STOP_2:
600 dev_dbg(dev, "%s - stop bits = 2\n", __func__);
601 cflag |= CSTOPB;
602 break;
603 default:
604 dev_dbg(dev, "%s - Unknown number of stop bits, using 1 stop bit\n", __func__);
605 bits &= ~BITS_STOP_MASK;
606 cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2);
607 break;
608 }
609
610 cp210x_get_config(port, CP210X_GET_FLOW, modem_ctl, 16);
611 if (modem_ctl[0] & 0x0008) {
612 dev_dbg(dev, "%s - flow control = CRTSCTS\n", __func__);
613 cflag |= CRTSCTS;
614 } else {
615 dev_dbg(dev, "%s - flow control = NONE\n", __func__);
616 cflag &= ~CRTSCTS;
617 }
618
619 *cflagp = cflag;
620 }
621
622 /*
623 * CP2101 supports the following baud rates:
624 *
625 * 300, 600, 1200, 1800, 2400, 4800, 7200, 9600, 14400, 19200, 28800,
626 * 38400, 56000, 57600, 115200, 128000, 230400, 460800, 921600
627 *
628 * CP2102 and CP2103 support the following additional rates:
629 *
630 * 4000, 16000, 51200, 64000, 76800, 153600, 250000, 256000, 500000,
631 * 576000
632 *
633 * The device will map a requested rate to a supported one, but the result
634 * of requests for rates greater than 1053257 is undefined (see AN205).
635 *
636 * CP2104, CP2105 and CP2110 support most rates up to 2M, 921k and 1M baud,
637 * respectively, with an error less than 1%. The actual rates are determined
638 * by
639 *
640 * div = round(freq / (2 x prescale x request))
641 * actual = freq / (2 x prescale x div)
642 *
643 * For CP2104 and CP2105 freq is 48Mhz and prescale is 4 for request <= 365bps
644 * or 1 otherwise.
645 * For CP2110 freq is 24Mhz and prescale is 4 for request <= 300bps or 1
646 * otherwise.
647 */
648 static void cp210x_change_speed(struct tty_struct *tty,
649 struct usb_serial_port *port, struct ktermios *old_termios)
650 {
651 u32 baud;
652
653 baud = tty->termios.c_ospeed;
654
655 /* This maps the requested rate to a rate valid on cp2102 or cp2103,
656 * or to an arbitrary rate in [1M,2M].
657 *
658 * NOTE: B0 is not implemented.
659 */
660 baud = cp210x_quantise_baudrate(baud);
661
662 dev_dbg(&port->dev, "%s - setting baud rate to %u\n", __func__, baud);
663 if (cp210x_set_config(port, CP210X_SET_BAUDRATE, &baud,
664 sizeof(baud))) {
665 dev_warn(&port->dev, "failed to set baud rate to %u\n", baud);
666 if (old_termios)
667 baud = old_termios->c_ospeed;
668 else
669 baud = 9600;
670 }
671
672 tty_encode_baud_rate(tty, baud, baud);
673 }
674
675 static void cp210x_set_termios(struct tty_struct *tty,
676 struct usb_serial_port *port, struct ktermios *old_termios)
677 {
678 struct device *dev = &port->dev;
679 unsigned int cflag, old_cflag;
680 unsigned int bits;
681 unsigned int modem_ctl[4];
682
683 cflag = tty->termios.c_cflag;
684 old_cflag = old_termios->c_cflag;
685
686 if (tty->termios.c_ospeed != old_termios->c_ospeed)
687 cp210x_change_speed(tty, port, old_termios);
688
689 /* If the number of data bits is to be updated */
690 if ((cflag & CSIZE) != (old_cflag & CSIZE)) {
691 cp210x_get_config(port, CP210X_GET_LINE_CTL, &bits, 2);
692 bits &= ~BITS_DATA_MASK;
693 switch (cflag & CSIZE) {
694 case CS5:
695 bits |= BITS_DATA_5;
696 dev_dbg(dev, "%s - data bits = 5\n", __func__);
697 break;
698 case CS6:
699 bits |= BITS_DATA_6;
700 dev_dbg(dev, "%s - data bits = 6\n", __func__);
701 break;
702 case CS7:
703 bits |= BITS_DATA_7;
704 dev_dbg(dev, "%s - data bits = 7\n", __func__);
705 break;
706 case CS8:
707 bits |= BITS_DATA_8;
708 dev_dbg(dev, "%s - data bits = 8\n", __func__);
709 break;
710 /*case CS9:
711 bits |= BITS_DATA_9;
712 dev_dbg(dev, "%s - data bits = 9\n", __func__);
713 break;*/
714 default:
715 dev_dbg(dev, "cp210x driver does not support the number of bits requested, using 8 bit mode\n");
716 bits |= BITS_DATA_8;
717 break;
718 }
719 if (cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2))
720 dev_dbg(dev, "Number of data bits requested not supported by device\n");
721 }
722
723 if ((cflag & (PARENB|PARODD|CMSPAR)) !=
724 (old_cflag & (PARENB|PARODD|CMSPAR))) {
725 cp210x_get_config(port, CP210X_GET_LINE_CTL, &bits, 2);
726 bits &= ~BITS_PARITY_MASK;
727 if (cflag & PARENB) {
728 if (cflag & CMSPAR) {
729 if (cflag & PARODD) {
730 bits |= BITS_PARITY_MARK;
731 dev_dbg(dev, "%s - parity = MARK\n", __func__);
732 } else {
733 bits |= BITS_PARITY_SPACE;
734 dev_dbg(dev, "%s - parity = SPACE\n", __func__);
735 }
736 } else {
737 if (cflag & PARODD) {
738 bits |= BITS_PARITY_ODD;
739 dev_dbg(dev, "%s - parity = ODD\n", __func__);
740 } else {
741 bits |= BITS_PARITY_EVEN;
742 dev_dbg(dev, "%s - parity = EVEN\n", __func__);
743 }
744 }
745 }
746 if (cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2))
747 dev_dbg(dev, "Parity mode not supported by device\n");
748 }
749
750 if ((cflag & CSTOPB) != (old_cflag & CSTOPB)) {
751 cp210x_get_config(port, CP210X_GET_LINE_CTL, &bits, 2);
752 bits &= ~BITS_STOP_MASK;
753 if (cflag & CSTOPB) {
754 bits |= BITS_STOP_2;
755 dev_dbg(dev, "%s - stop bits = 2\n", __func__);
756 } else {
757 bits |= BITS_STOP_1;
758 dev_dbg(dev, "%s - stop bits = 1\n", __func__);
759 }
760 if (cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2))
761 dev_dbg(dev, "Number of stop bits requested not supported by device\n");
762 }
763
764 if ((cflag & CRTSCTS) != (old_cflag & CRTSCTS)) {
765 cp210x_get_config(port, CP210X_GET_FLOW, modem_ctl, 16);
766 dev_dbg(dev, "%s - read modem controls = 0x%.4x 0x%.4x 0x%.4x 0x%.4x\n",
767 __func__, modem_ctl[0], modem_ctl[1],
768 modem_ctl[2], modem_ctl[3]);
769
770 if (cflag & CRTSCTS) {
771 modem_ctl[0] &= ~0x7B;
772 modem_ctl[0] |= 0x09;
773 modem_ctl[1] = 0x80;
774 dev_dbg(dev, "%s - flow control = CRTSCTS\n", __func__);
775 } else {
776 modem_ctl[0] &= ~0x7B;
777 modem_ctl[0] |= 0x01;
778 modem_ctl[1] |= 0x40;
779 dev_dbg(dev, "%s - flow control = NONE\n", __func__);
780 }
781
782 dev_dbg(dev, "%s - write modem controls = 0x%.4x 0x%.4x 0x%.4x 0x%.4x\n",
783 __func__, modem_ctl[0], modem_ctl[1],
784 modem_ctl[2], modem_ctl[3]);
785 cp210x_set_config(port, CP210X_SET_FLOW, modem_ctl, 16);
786 }
787
788 }
789
790 static int cp210x_tiocmset(struct tty_struct *tty,
791 unsigned int set, unsigned int clear)
792 {
793 struct usb_serial_port *port = tty->driver_data;
794 return cp210x_tiocmset_port(port, set, clear);
795 }
796
797 static int cp210x_tiocmset_port(struct usb_serial_port *port,
798 unsigned int set, unsigned int clear)
799 {
800 unsigned int control = 0;
801
802 if (set & TIOCM_RTS) {
803 control |= CONTROL_RTS;
804 control |= CONTROL_WRITE_RTS;
805 }
806 if (set & TIOCM_DTR) {
807 control |= CONTROL_DTR;
808 control |= CONTROL_WRITE_DTR;
809 }
810 if (clear & TIOCM_RTS) {
811 control &= ~CONTROL_RTS;
812 control |= CONTROL_WRITE_RTS;
813 }
814 if (clear & TIOCM_DTR) {
815 control &= ~CONTROL_DTR;
816 control |= CONTROL_WRITE_DTR;
817 }
818
819 dev_dbg(&port->dev, "%s - control = 0x%.4x\n", __func__, control);
820
821 return cp210x_set_config(port, CP210X_SET_MHS, &control, 2);
822 }
823
824 static void cp210x_dtr_rts(struct usb_serial_port *p, int on)
825 {
826 if (on)
827 cp210x_tiocmset_port(p, TIOCM_DTR|TIOCM_RTS, 0);
828 else
829 cp210x_tiocmset_port(p, 0, TIOCM_DTR|TIOCM_RTS);
830 }
831
832 static int cp210x_tiocmget(struct tty_struct *tty)
833 {
834 struct usb_serial_port *port = tty->driver_data;
835 unsigned int control;
836 int result;
837
838 cp210x_get_config(port, CP210X_GET_MDMSTS, &control, 1);
839
840 result = ((control & CONTROL_DTR) ? TIOCM_DTR : 0)
841 |((control & CONTROL_RTS) ? TIOCM_RTS : 0)
842 |((control & CONTROL_CTS) ? TIOCM_CTS : 0)
843 |((control & CONTROL_DSR) ? TIOCM_DSR : 0)
844 |((control & CONTROL_RING)? TIOCM_RI : 0)
845 |((control & CONTROL_DCD) ? TIOCM_CD : 0);
846
847 dev_dbg(&port->dev, "%s - control = 0x%.2x\n", __func__, control);
848
849 return result;
850 }
851
852 static void cp210x_break_ctl(struct tty_struct *tty, int break_state)
853 {
854 struct usb_serial_port *port = tty->driver_data;
855 unsigned int state;
856
857 if (break_state == 0)
858 state = BREAK_OFF;
859 else
860 state = BREAK_ON;
861 dev_dbg(&port->dev, "%s - turning break %s\n", __func__,
862 state == BREAK_OFF ? "off" : "on");
863 cp210x_set_config(port, CP210X_SET_BREAK, &state, 2);
864 }
865
866 static int cp210x_startup(struct usb_serial *serial)
867 {
868 struct usb_host_interface *cur_altsetting;
869 struct cp210x_serial_private *spriv;
870
871 spriv = kzalloc(sizeof(*spriv), GFP_KERNEL);
872 if (!spriv)
873 return -ENOMEM;
874
875 cur_altsetting = serial->interface->cur_altsetting;
876 spriv->bInterfaceNumber = cur_altsetting->desc.bInterfaceNumber;
877
878 usb_set_serial_data(serial, spriv);
879
880 return 0;
881 }
882
883 static void cp210x_release(struct usb_serial *serial)
884 {
885 struct cp210x_serial_private *spriv;
886
887 spriv = usb_get_serial_data(serial);
888 kfree(spriv);
889 }
890
891 module_usb_serial_driver(serial_drivers, id_table);
892
893 MODULE_DESCRIPTION(DRIVER_DESC);
894 MODULE_LICENSE("GPL");
Linux with added FPC-III support