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NFS: Don't clear desc->pg_moreio in nfs_do_recoalesce()
[linux/fpc-iii.git] / drivers / usb / serial / spcp8x5.c
blobef0dbf0703c574eb62d1e2ce3be49e5186258aee
1 /*
2 * spcp8x5 USB to serial adaptor driver
3 *
4 * Copyright (C) 2010-2013 Johan Hovold (jhovold@gmail.com)
5 * Copyright (C) 2006 Linxb (xubin.lin@worldplus.com.cn)
6 * Copyright (C) 2006 S1 Corp.
7 *
8 * Original driver for 2.6.10 pl2303 driver by
9 * Greg Kroah-Hartman (greg@kroah.com)
10 * Changes for 2.6.20 by Harald Klein <hari@vt100.at>
11 *
12 * This program is free software; you can redistribute it and/or modify
13 * it under the terms of the GNU General Public License as published by
14 * the Free Software Foundation; either version 2 of the License, or
15 * (at your option) any later version.
16 */
17 #include <linux/kernel.h>
18 #include <linux/errno.h>
19 #include <linux/slab.h>
20 #include <linux/tty.h>
21 #include <linux/tty_driver.h>
22 #include <linux/tty_flip.h>
23 #include <linux/module.h>
24 #include <linux/spinlock.h>
25 #include <linux/usb.h>
26 #include <linux/usb/serial.h>
27
28 #define DRIVER_DESC "SPCP8x5 USB to serial adaptor driver"
29
30 #define SPCP825_QUIRK_NO_UART_STATUS 0x01
31 #define SPCP825_QUIRK_NO_WORK_MODE 0x02
32
33 #define SPCP8x5_007_VID 0x04FC
34 #define SPCP8x5_007_PID 0x0201
35 #define SPCP8x5_008_VID 0x04fc
36 #define SPCP8x5_008_PID 0x0235
37 #define SPCP8x5_PHILIPS_VID 0x0471
38 #define SPCP8x5_PHILIPS_PID 0x081e
39 #define SPCP8x5_INTERMATIC_VID 0x04FC
40 #define SPCP8x5_INTERMATIC_PID 0x0204
41 #define SPCP8x5_835_VID 0x04fc
42 #define SPCP8x5_835_PID 0x0231
43
44 static const struct usb_device_id id_table[] = {
45 { USB_DEVICE(SPCP8x5_PHILIPS_VID , SPCP8x5_PHILIPS_PID)},
46 { USB_DEVICE(SPCP8x5_INTERMATIC_VID, SPCP8x5_INTERMATIC_PID)},
47 { USB_DEVICE(SPCP8x5_835_VID, SPCP8x5_835_PID)},
48 { USB_DEVICE(SPCP8x5_008_VID, SPCP8x5_008_PID)},
49 { USB_DEVICE(SPCP8x5_007_VID, SPCP8x5_007_PID),
50 .driver_info = SPCP825_QUIRK_NO_UART_STATUS |
51 SPCP825_QUIRK_NO_WORK_MODE },
52 { } /* Terminating entry */
53 };
54 MODULE_DEVICE_TABLE(usb, id_table);
55
56 struct spcp8x5_usb_ctrl_arg {
57 u8 type;
58 u8 cmd;
59 u8 cmd_type;
60 u16 value;
61 u16 index;
62 u16 length;
63 };
64
65
66 /* spcp8x5 spec register define */
67 #define MCR_CONTROL_LINE_RTS 0x02
68 #define MCR_CONTROL_LINE_DTR 0x01
69 #define MCR_DTR 0x01
70 #define MCR_RTS 0x02
71
72 #define MSR_STATUS_LINE_DCD 0x80
73 #define MSR_STATUS_LINE_RI 0x40
74 #define MSR_STATUS_LINE_DSR 0x20
75 #define MSR_STATUS_LINE_CTS 0x10
76
77 /* verdor command here , we should define myself */
78 #define SET_DEFAULT 0x40
79 #define SET_DEFAULT_TYPE 0x20
80
81 #define SET_UART_FORMAT 0x40
82 #define SET_UART_FORMAT_TYPE 0x21
83 #define SET_UART_FORMAT_SIZE_5 0x00
84 #define SET_UART_FORMAT_SIZE_6 0x01
85 #define SET_UART_FORMAT_SIZE_7 0x02
86 #define SET_UART_FORMAT_SIZE_8 0x03
87 #define SET_UART_FORMAT_STOP_1 0x00
88 #define SET_UART_FORMAT_STOP_2 0x04
89 #define SET_UART_FORMAT_PAR_NONE 0x00
90 #define SET_UART_FORMAT_PAR_ODD 0x10
91 #define SET_UART_FORMAT_PAR_EVEN 0x30
92 #define SET_UART_FORMAT_PAR_MASK 0xD0
93 #define SET_UART_FORMAT_PAR_SPACE 0x90
94
95 #define GET_UART_STATUS_TYPE 0xc0
96 #define GET_UART_STATUS 0x22
97 #define GET_UART_STATUS_MSR 0x06
98
99 #define SET_UART_STATUS 0x40
100 #define SET_UART_STATUS_TYPE 0x23
101 #define SET_UART_STATUS_MCR 0x0004
102 #define SET_UART_STATUS_MCR_DTR 0x01
103 #define SET_UART_STATUS_MCR_RTS 0x02
104 #define SET_UART_STATUS_MCR_LOOP 0x10
105
106 #define SET_WORKING_MODE 0x40
107 #define SET_WORKING_MODE_TYPE 0x24
108 #define SET_WORKING_MODE_U2C 0x00
109 #define SET_WORKING_MODE_RS485 0x01
110 #define SET_WORKING_MODE_PDMA 0x02
111 #define SET_WORKING_MODE_SPP 0x03
112
113 #define SET_FLOWCTL_CHAR 0x40
114 #define SET_FLOWCTL_CHAR_TYPE 0x25
115
116 #define GET_VERSION 0xc0
117 #define GET_VERSION_TYPE 0x26
118
119 #define SET_REGISTER 0x40
120 #define SET_REGISTER_TYPE 0x27
121
122 #define GET_REGISTER 0xc0
123 #define GET_REGISTER_TYPE 0x28
124
125 #define SET_RAM 0x40
126 #define SET_RAM_TYPE 0x31
127
128 #define GET_RAM 0xc0
129 #define GET_RAM_TYPE 0x32
130
131 /* how come ??? */
132 #define UART_STATE 0x08
133 #define UART_STATE_TRANSIENT_MASK 0x75
134 #define UART_DCD 0x01
135 #define UART_DSR 0x02
136 #define UART_BREAK_ERROR 0x04
137 #define UART_RING 0x08
138 #define UART_FRAME_ERROR 0x10
139 #define UART_PARITY_ERROR 0x20
140 #define UART_OVERRUN_ERROR 0x40
141 #define UART_CTS 0x80
142
143 struct spcp8x5_private {
144 unsigned quirks;
145 spinlock_t lock;
146 u8 line_control;
147 };
148
149 static int spcp8x5_probe(struct usb_serial *serial,
150 const struct usb_device_id *id)
151 {
152 usb_set_serial_data(serial, (void *)id);
153
154 return 0;
155 }
156
157 static int spcp8x5_port_probe(struct usb_serial_port *port)
158 {
159 const struct usb_device_id *id = usb_get_serial_data(port->serial);
160 struct spcp8x5_private *priv;
161
162 priv = kzalloc(sizeof(*priv), GFP_KERNEL);
163 if (!priv)
164 return -ENOMEM;
165
166 spin_lock_init(&priv->lock);
167 priv->quirks = id->driver_info;
168
169 usb_set_serial_port_data(port, priv);
170
171 port->port.drain_delay = 256;
172
173 return 0;
174 }
175
176 static int spcp8x5_port_remove(struct usb_serial_port *port)
177 {
178 struct spcp8x5_private *priv;
179
180 priv = usb_get_serial_port_data(port);
181 kfree(priv);
182
183 return 0;
184 }
185
186 static int spcp8x5_set_ctrl_line(struct usb_serial_port *port, u8 mcr)
187 {
188 struct spcp8x5_private *priv = usb_get_serial_port_data(port);
189 struct usb_device *dev = port->serial->dev;
190 int retval;
191
192 if (priv->quirks & SPCP825_QUIRK_NO_UART_STATUS)
193 return -EPERM;
194
195 retval = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
196 SET_UART_STATUS_TYPE, SET_UART_STATUS,
197 mcr, 0x04, NULL, 0, 100);
198 if (retval != 0) {
199 dev_err(&port->dev, "failed to set control lines: %d\n",
200 retval);
201 }
202 return retval;
203 }
204
205 static int spcp8x5_get_msr(struct usb_serial_port *port, u8 *status)
206 {
207 struct spcp8x5_private *priv = usb_get_serial_port_data(port);
208 struct usb_device *dev = port->serial->dev;
209 u8 *buf;
210 int ret;
211
212 if (priv->quirks & SPCP825_QUIRK_NO_UART_STATUS)
213 return -EPERM;
214
215 buf = kzalloc(1, GFP_KERNEL);
216 if (!buf)
217 return -ENOMEM;
218
219 ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
220 GET_UART_STATUS, GET_UART_STATUS_TYPE,
221 0, GET_UART_STATUS_MSR, buf, 1, 100);
222 if (ret < 0)
223 dev_err(&port->dev, "failed to get modem status: %d\n", ret);
224
225 dev_dbg(&port->dev, "0xc0:0x22:0:6 %d - 0x02%x\n", ret, *buf);
226 *status = *buf;
227 kfree(buf);
228
229 return ret;
230 }
231
232 static void spcp8x5_set_work_mode(struct usb_serial_port *port, u16 value,
233 u16 index)
234 {
235 struct spcp8x5_private *priv = usb_get_serial_port_data(port);
236 struct usb_device *dev = port->serial->dev;
237 int ret;
238
239 if (priv->quirks & SPCP825_QUIRK_NO_WORK_MODE)
240 return;
241
242 ret = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
243 SET_WORKING_MODE_TYPE, SET_WORKING_MODE,
244 value, index, NULL, 0, 100);
245 dev_dbg(&port->dev, "value = %#x , index = %#x\n", value, index);
246 if (ret < 0)
247 dev_err(&port->dev, "failed to set work mode: %d\n", ret);
248 }
249
250 static int spcp8x5_carrier_raised(struct usb_serial_port *port)
251 {
252 u8 msr;
253 int ret;
254
255 ret = spcp8x5_get_msr(port, &msr);
256 if (ret || msr & MSR_STATUS_LINE_DCD)
257 return 1;
258
259 return 0;
260 }
261
262 static void spcp8x5_dtr_rts(struct usb_serial_port *port, int on)
263 {
264 struct spcp8x5_private *priv = usb_get_serial_port_data(port);
265 unsigned long flags;
266 u8 control;
267
268 spin_lock_irqsave(&priv->lock, flags);
269 if (on)
270 priv->line_control = MCR_CONTROL_LINE_DTR
271 | MCR_CONTROL_LINE_RTS;
272 else
273 priv->line_control &= ~ (MCR_CONTROL_LINE_DTR
274 | MCR_CONTROL_LINE_RTS);
275 control = priv->line_control;
276 spin_unlock_irqrestore(&priv->lock, flags);
277 spcp8x5_set_ctrl_line(port, control);
278 }
279
280 static void spcp8x5_init_termios(struct tty_struct *tty)
281 {
282 tty->termios = tty_std_termios;
283 tty->termios.c_cflag = B115200 | CS8 | CREAD | HUPCL | CLOCAL;
284 tty->termios.c_ispeed = 115200;
285 tty->termios.c_ospeed = 115200;
286 }
287
288 static void spcp8x5_set_termios(struct tty_struct *tty,
289 struct usb_serial_port *port, struct ktermios *old_termios)
290 {
291 struct usb_serial *serial = port->serial;
292 struct spcp8x5_private *priv = usb_get_serial_port_data(port);
293 unsigned long flags;
294 unsigned int cflag = tty->termios.c_cflag;
295 unsigned short uartdata;
296 unsigned char buf[2] = {0, 0};
297 int baud;
298 int i;
299 u8 control;
300
301 /* check that they really want us to change something */
302 if (old_termios && !tty_termios_hw_change(&tty->termios, old_termios))
303 return;
304
305 /* set DTR/RTS active */
306 spin_lock_irqsave(&priv->lock, flags);
307 control = priv->line_control;
308 if (old_termios && (old_termios->c_cflag & CBAUD) == B0) {
309 priv->line_control |= MCR_DTR;
310 if (!(old_termios->c_cflag & CRTSCTS))
311 priv->line_control |= MCR_RTS;
312 }
313 if (control != priv->line_control) {
314 control = priv->line_control;
315 spin_unlock_irqrestore(&priv->lock, flags);
316 spcp8x5_set_ctrl_line(port, control);
317 } else {
318 spin_unlock_irqrestore(&priv->lock, flags);
319 }
320
321 /* Set Baud Rate */
322 baud = tty_get_baud_rate(tty);
323 switch (baud) {
324 case 300: buf[0] = 0x00; break;
325 case 600: buf[0] = 0x01; break;
326 case 1200: buf[0] = 0x02; break;
327 case 2400: buf[0] = 0x03; break;
328 case 4800: buf[0] = 0x04; break;
329 case 9600: buf[0] = 0x05; break;
330 case 19200: buf[0] = 0x07; break;
331 case 38400: buf[0] = 0x09; break;
332 case 57600: buf[0] = 0x0a; break;
333 case 115200: buf[0] = 0x0b; break;
334 case 230400: buf[0] = 0x0c; break;
335 case 460800: buf[0] = 0x0d; break;
336 case 921600: buf[0] = 0x0e; break;
337 /* case 1200000: buf[0] = 0x0f; break; */
338 /* case 2400000: buf[0] = 0x10; break; */
339 case 3000000: buf[0] = 0x11; break;
340 /* case 6000000: buf[0] = 0x12; break; */
341 case 0:
342 case 1000000:
343 buf[0] = 0x0b; break;
344 default:
345 dev_err(&port->dev, "unsupported baudrate, using 9600\n");
346 }
347
348 /* Set Data Length : 00:5bit, 01:6bit, 10:7bit, 11:8bit */
349 switch (cflag & CSIZE) {
350 case CS5:
351 buf[1] |= SET_UART_FORMAT_SIZE_5;
352 break;
353 case CS6:
354 buf[1] |= SET_UART_FORMAT_SIZE_6;
355 break;
356 case CS7:
357 buf[1] |= SET_UART_FORMAT_SIZE_7;
358 break;
359 default:
360 case CS8:
361 buf[1] |= SET_UART_FORMAT_SIZE_8;
362 break;
363 }
364
365 /* Set Stop bit2 : 0:1bit 1:2bit */
366 buf[1] |= (cflag & CSTOPB) ? SET_UART_FORMAT_STOP_2 :
367 SET_UART_FORMAT_STOP_1;
368
369 /* Set Parity bit3-4 01:Odd 11:Even */
370 if (cflag & PARENB) {
371 buf[1] |= (cflag & PARODD) ?
372 SET_UART_FORMAT_PAR_ODD : SET_UART_FORMAT_PAR_EVEN ;
373 } else {
374 buf[1] |= SET_UART_FORMAT_PAR_NONE;
375 }
376 uartdata = buf[0] | buf[1]<<8;
377
378 i = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
379 SET_UART_FORMAT_TYPE, SET_UART_FORMAT,
380 uartdata, 0, NULL, 0, 100);
381 if (i < 0)
382 dev_err(&port->dev, "Set UART format %#x failed (error = %d)\n",
383 uartdata, i);
384 dev_dbg(&port->dev, "0x21:0x40:0:0 %d\n", i);
385
386 if (cflag & CRTSCTS) {
387 /* enable hardware flow control */
388 spcp8x5_set_work_mode(port, 0x000a, SET_WORKING_MODE_U2C);
389 }
390 }
391
392 static int spcp8x5_open(struct tty_struct *tty, struct usb_serial_port *port)
393 {
394 struct usb_serial *serial = port->serial;
395 struct spcp8x5_private *priv = usb_get_serial_port_data(port);
396 int ret;
397
398 usb_clear_halt(serial->dev, port->write_urb->pipe);
399 usb_clear_halt(serial->dev, port->read_urb->pipe);
400
401 ret = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
402 0x09, 0x00,
403 0x01, 0x00, NULL, 0x00, 100);
404 if (ret)
405 return ret;
406
407 spcp8x5_set_ctrl_line(port, priv->line_control);
408
409 if (tty)
410 spcp8x5_set_termios(tty, port, NULL);
411
412 return usb_serial_generic_open(tty, port);
413 }
414
415 static int spcp8x5_tiocmset(struct tty_struct *tty,
416 unsigned int set, unsigned int clear)
417 {
418 struct usb_serial_port *port = tty->driver_data;
419 struct spcp8x5_private *priv = usb_get_serial_port_data(port);
420 unsigned long flags;
421 u8 control;
422
423 spin_lock_irqsave(&priv->lock, flags);
424 if (set & TIOCM_RTS)
425 priv->line_control |= MCR_RTS;
426 if (set & TIOCM_DTR)
427 priv->line_control |= MCR_DTR;
428 if (clear & TIOCM_RTS)
429 priv->line_control &= ~MCR_RTS;
430 if (clear & TIOCM_DTR)
431 priv->line_control &= ~MCR_DTR;
432 control = priv->line_control;
433 spin_unlock_irqrestore(&priv->lock, flags);
434
435 return spcp8x5_set_ctrl_line(port, control);
436 }
437
438 static int spcp8x5_tiocmget(struct tty_struct *tty)
439 {
440 struct usb_serial_port *port = tty->driver_data;
441 struct spcp8x5_private *priv = usb_get_serial_port_data(port);
442 unsigned long flags;
443 unsigned int mcr;
444 u8 status;
445 unsigned int result;
446
447 result = spcp8x5_get_msr(port, &status);
448 if (result)
449 return result;
450
451 spin_lock_irqsave(&priv->lock, flags);
452 mcr = priv->line_control;
453 spin_unlock_irqrestore(&priv->lock, flags);
454
455 result = ((mcr & MCR_DTR) ? TIOCM_DTR : 0)
456 | ((mcr & MCR_RTS) ? TIOCM_RTS : 0)
457 | ((status & MSR_STATUS_LINE_CTS) ? TIOCM_CTS : 0)
458 | ((status & MSR_STATUS_LINE_DSR) ? TIOCM_DSR : 0)
459 | ((status & MSR_STATUS_LINE_RI) ? TIOCM_RI : 0)
460 | ((status & MSR_STATUS_LINE_DCD) ? TIOCM_CD : 0);
461
462 return result;
463 }
464
465 static struct usb_serial_driver spcp8x5_device = {
466 .driver = {
467 .owner = THIS_MODULE,
468 .name = "SPCP8x5",
469 },
470 .id_table = id_table,
471 .num_ports = 1,
472 .open = spcp8x5_open,
473 .dtr_rts = spcp8x5_dtr_rts,
474 .carrier_raised = spcp8x5_carrier_raised,
475 .set_termios = spcp8x5_set_termios,
476 .init_termios = spcp8x5_init_termios,
477 .tiocmget = spcp8x5_tiocmget,
478 .tiocmset = spcp8x5_tiocmset,
479 .probe = spcp8x5_probe,
480 .port_probe = spcp8x5_port_probe,
481 .port_remove = spcp8x5_port_remove,
482 };
483
484 static struct usb_serial_driver * const serial_drivers[] = {
485 &spcp8x5_device, NULL
486 };
487
488 module_usb_serial_driver(serial_drivers, id_table);
489
490 MODULE_DESCRIPTION(DRIVER_DESC);
491 MODULE_LICENSE("GPL");
Linux with added FPC-III support