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inet: frag: enforce memory limits earlier
[linux/fpc-iii.git] / drivers / usb / serial / spcp8x5.c
blobddfd787c461cb5367c1f932b3edffb42c0812832
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_attach(struct usb_serial *serial)
158 {
159 unsigned char num_ports = serial->num_ports;
160
161 if (serial->num_bulk_in < num_ports ||
162 serial->num_bulk_out < num_ports) {
163 dev_err(&serial->interface->dev, "missing endpoints\n");
164 return -ENODEV;
165 }
166
167 return 0;
168 }
169
170 static int spcp8x5_port_probe(struct usb_serial_port *port)
171 {
172 const struct usb_device_id *id = usb_get_serial_data(port->serial);
173 struct spcp8x5_private *priv;
174
175 priv = kzalloc(sizeof(*priv), GFP_KERNEL);
176 if (!priv)
177 return -ENOMEM;
178
179 spin_lock_init(&priv->lock);
180 priv->quirks = id->driver_info;
181
182 usb_set_serial_port_data(port, priv);
183
184 port->port.drain_delay = 256;
185
186 return 0;
187 }
188
189 static int spcp8x5_port_remove(struct usb_serial_port *port)
190 {
191 struct spcp8x5_private *priv;
192
193 priv = usb_get_serial_port_data(port);
194 kfree(priv);
195
196 return 0;
197 }
198
199 static int spcp8x5_set_ctrl_line(struct usb_serial_port *port, u8 mcr)
200 {
201 struct spcp8x5_private *priv = usb_get_serial_port_data(port);
202 struct usb_device *dev = port->serial->dev;
203 int retval;
204
205 if (priv->quirks & SPCP825_QUIRK_NO_UART_STATUS)
206 return -EPERM;
207
208 retval = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
209 SET_UART_STATUS_TYPE, SET_UART_STATUS,
210 mcr, 0x04, NULL, 0, 100);
211 if (retval != 0) {
212 dev_err(&port->dev, "failed to set control lines: %d\n",
213 retval);
214 }
215 return retval;
216 }
217
218 static int spcp8x5_get_msr(struct usb_serial_port *port, u8 *status)
219 {
220 struct spcp8x5_private *priv = usb_get_serial_port_data(port);
221 struct usb_device *dev = port->serial->dev;
222 u8 *buf;
223 int ret;
224
225 if (priv->quirks & SPCP825_QUIRK_NO_UART_STATUS)
226 return -EPERM;
227
228 buf = kzalloc(1, GFP_KERNEL);
229 if (!buf)
230 return -ENOMEM;
231
232 ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
233 GET_UART_STATUS, GET_UART_STATUS_TYPE,
234 0, GET_UART_STATUS_MSR, buf, 1, 100);
235 if (ret < 1) {
236 dev_err(&port->dev, "failed to get modem status: %d\n", ret);
237 if (ret >= 0)
238 ret = -EIO;
239 goto out;
240 }
241
242 dev_dbg(&port->dev, "0xc0:0x22:0:6 %d - 0x02%x\n", ret, *buf);
243 *status = *buf;
244 ret = 0;
245 out:
246 kfree(buf);
247
248 return ret;
249 }
250
251 static void spcp8x5_set_work_mode(struct usb_serial_port *port, u16 value,
252 u16 index)
253 {
254 struct spcp8x5_private *priv = usb_get_serial_port_data(port);
255 struct usb_device *dev = port->serial->dev;
256 int ret;
257
258 if (priv->quirks & SPCP825_QUIRK_NO_WORK_MODE)
259 return;
260
261 ret = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
262 SET_WORKING_MODE_TYPE, SET_WORKING_MODE,
263 value, index, NULL, 0, 100);
264 dev_dbg(&port->dev, "value = %#x , index = %#x\n", value, index);
265 if (ret < 0)
266 dev_err(&port->dev, "failed to set work mode: %d\n", ret);
267 }
268
269 static int spcp8x5_carrier_raised(struct usb_serial_port *port)
270 {
271 u8 msr;
272 int ret;
273
274 ret = spcp8x5_get_msr(port, &msr);
275 if (ret || msr & MSR_STATUS_LINE_DCD)
276 return 1;
277
278 return 0;
279 }
280
281 static void spcp8x5_dtr_rts(struct usb_serial_port *port, int on)
282 {
283 struct spcp8x5_private *priv = usb_get_serial_port_data(port);
284 unsigned long flags;
285 u8 control;
286
287 spin_lock_irqsave(&priv->lock, flags);
288 if (on)
289 priv->line_control = MCR_CONTROL_LINE_DTR
290 | MCR_CONTROL_LINE_RTS;
291 else
292 priv->line_control &= ~ (MCR_CONTROL_LINE_DTR
293 | MCR_CONTROL_LINE_RTS);
294 control = priv->line_control;
295 spin_unlock_irqrestore(&priv->lock, flags);
296 spcp8x5_set_ctrl_line(port, control);
297 }
298
299 static void spcp8x5_init_termios(struct tty_struct *tty)
300 {
301 tty->termios = tty_std_termios;
302 tty->termios.c_cflag = B115200 | CS8 | CREAD | HUPCL | CLOCAL;
303 tty->termios.c_ispeed = 115200;
304 tty->termios.c_ospeed = 115200;
305 }
306
307 static void spcp8x5_set_termios(struct tty_struct *tty,
308 struct usb_serial_port *port, struct ktermios *old_termios)
309 {
310 struct usb_serial *serial = port->serial;
311 struct spcp8x5_private *priv = usb_get_serial_port_data(port);
312 unsigned long flags;
313 unsigned int cflag = tty->termios.c_cflag;
314 unsigned short uartdata;
315 unsigned char buf[2] = {0, 0};
316 int baud;
317 int i;
318 u8 control;
319
320 /* check that they really want us to change something */
321 if (old_termios && !tty_termios_hw_change(&tty->termios, old_termios))
322 return;
323
324 /* set DTR/RTS active */
325 spin_lock_irqsave(&priv->lock, flags);
326 control = priv->line_control;
327 if (old_termios && (old_termios->c_cflag & CBAUD) == B0) {
328 priv->line_control |= MCR_DTR;
329 if (!(old_termios->c_cflag & CRTSCTS))
330 priv->line_control |= MCR_RTS;
331 }
332 if (control != priv->line_control) {
333 control = priv->line_control;
334 spin_unlock_irqrestore(&priv->lock, flags);
335 spcp8x5_set_ctrl_line(port, control);
336 } else {
337 spin_unlock_irqrestore(&priv->lock, flags);
338 }
339
340 /* Set Baud Rate */
341 baud = tty_get_baud_rate(tty);
342 switch (baud) {
343 case 300: buf[0] = 0x00; break;
344 case 600: buf[0] = 0x01; break;
345 case 1200: buf[0] = 0x02; break;
346 case 2400: buf[0] = 0x03; break;
347 case 4800: buf[0] = 0x04; break;
348 case 9600: buf[0] = 0x05; break;
349 case 19200: buf[0] = 0x07; break;
350 case 38400: buf[0] = 0x09; break;
351 case 57600: buf[0] = 0x0a; break;
352 case 115200: buf[0] = 0x0b; break;
353 case 230400: buf[0] = 0x0c; break;
354 case 460800: buf[0] = 0x0d; break;
355 case 921600: buf[0] = 0x0e; break;
356 /* case 1200000: buf[0] = 0x0f; break; */
357 /* case 2400000: buf[0] = 0x10; break; */
358 case 3000000: buf[0] = 0x11; break;
359 /* case 6000000: buf[0] = 0x12; break; */
360 case 0:
361 case 1000000:
362 buf[0] = 0x0b; break;
363 default:
364 dev_err(&port->dev, "unsupported baudrate, using 9600\n");
365 }
366
367 /* Set Data Length : 00:5bit, 01:6bit, 10:7bit, 11:8bit */
368 switch (cflag & CSIZE) {
369 case CS5:
370 buf[1] |= SET_UART_FORMAT_SIZE_5;
371 break;
372 case CS6:
373 buf[1] |= SET_UART_FORMAT_SIZE_6;
374 break;
375 case CS7:
376 buf[1] |= SET_UART_FORMAT_SIZE_7;
377 break;
378 default:
379 case CS8:
380 buf[1] |= SET_UART_FORMAT_SIZE_8;
381 break;
382 }
383
384 /* Set Stop bit2 : 0:1bit 1:2bit */
385 buf[1] |= (cflag & CSTOPB) ? SET_UART_FORMAT_STOP_2 :
386 SET_UART_FORMAT_STOP_1;
387
388 /* Set Parity bit3-4 01:Odd 11:Even */
389 if (cflag & PARENB) {
390 buf[1] |= (cflag & PARODD) ?
391 SET_UART_FORMAT_PAR_ODD : SET_UART_FORMAT_PAR_EVEN ;
392 } else {
393 buf[1] |= SET_UART_FORMAT_PAR_NONE;
394 }
395 uartdata = buf[0] | buf[1]<<8;
396
397 i = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
398 SET_UART_FORMAT_TYPE, SET_UART_FORMAT,
399 uartdata, 0, NULL, 0, 100);
400 if (i < 0)
401 dev_err(&port->dev, "Set UART format %#x failed (error = %d)\n",
402 uartdata, i);
403 dev_dbg(&port->dev, "0x21:0x40:0:0 %d\n", i);
404
405 if (cflag & CRTSCTS) {
406 /* enable hardware flow control */
407 spcp8x5_set_work_mode(port, 0x000a, SET_WORKING_MODE_U2C);
408 }
409 }
410
411 static int spcp8x5_open(struct tty_struct *tty, struct usb_serial_port *port)
412 {
413 struct usb_serial *serial = port->serial;
414 struct spcp8x5_private *priv = usb_get_serial_port_data(port);
415 int ret;
416
417 usb_clear_halt(serial->dev, port->write_urb->pipe);
418 usb_clear_halt(serial->dev, port->read_urb->pipe);
419
420 ret = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
421 0x09, 0x00,
422 0x01, 0x00, NULL, 0x00, 100);
423 if (ret)
424 return ret;
425
426 spcp8x5_set_ctrl_line(port, priv->line_control);
427
428 if (tty)
429 spcp8x5_set_termios(tty, port, NULL);
430
431 return usb_serial_generic_open(tty, port);
432 }
433
434 static int spcp8x5_tiocmset(struct tty_struct *tty,
435 unsigned int set, unsigned int clear)
436 {
437 struct usb_serial_port *port = tty->driver_data;
438 struct spcp8x5_private *priv = usb_get_serial_port_data(port);
439 unsigned long flags;
440 u8 control;
441
442 spin_lock_irqsave(&priv->lock, flags);
443 if (set & TIOCM_RTS)
444 priv->line_control |= MCR_RTS;
445 if (set & TIOCM_DTR)
446 priv->line_control |= MCR_DTR;
447 if (clear & TIOCM_RTS)
448 priv->line_control &= ~MCR_RTS;
449 if (clear & TIOCM_DTR)
450 priv->line_control &= ~MCR_DTR;
451 control = priv->line_control;
452 spin_unlock_irqrestore(&priv->lock, flags);
453
454 return spcp8x5_set_ctrl_line(port, control);
455 }
456
457 static int spcp8x5_tiocmget(struct tty_struct *tty)
458 {
459 struct usb_serial_port *port = tty->driver_data;
460 struct spcp8x5_private *priv = usb_get_serial_port_data(port);
461 unsigned long flags;
462 unsigned int mcr;
463 u8 status;
464 unsigned int result;
465
466 result = spcp8x5_get_msr(port, &status);
467 if (result)
468 return result;
469
470 spin_lock_irqsave(&priv->lock, flags);
471 mcr = priv->line_control;
472 spin_unlock_irqrestore(&priv->lock, flags);
473
474 result = ((mcr & MCR_DTR) ? TIOCM_DTR : 0)
475 | ((mcr & MCR_RTS) ? TIOCM_RTS : 0)
476 | ((status & MSR_STATUS_LINE_CTS) ? TIOCM_CTS : 0)
477 | ((status & MSR_STATUS_LINE_DSR) ? TIOCM_DSR : 0)
478 | ((status & MSR_STATUS_LINE_RI) ? TIOCM_RI : 0)
479 | ((status & MSR_STATUS_LINE_DCD) ? TIOCM_CD : 0);
480
481 return result;
482 }
483
484 static struct usb_serial_driver spcp8x5_device = {
485 .driver = {
486 .owner = THIS_MODULE,
487 .name = "SPCP8x5",
488 },
489 .id_table = id_table,
490 .num_ports = 1,
491 .open = spcp8x5_open,
492 .dtr_rts = spcp8x5_dtr_rts,
493 .carrier_raised = spcp8x5_carrier_raised,
494 .set_termios = spcp8x5_set_termios,
495 .init_termios = spcp8x5_init_termios,
496 .tiocmget = spcp8x5_tiocmget,
497 .tiocmset = spcp8x5_tiocmset,
498 .probe = spcp8x5_probe,
499 .attach = spcp8x5_attach,
500 .port_probe = spcp8x5_port_probe,
501 .port_remove = spcp8x5_port_remove,
502 };
503
504 static struct usb_serial_driver * const serial_drivers[] = {
505 &spcp8x5_device, NULL
506 };
507
508 module_usb_serial_driver(serial_drivers, id_table);
509
510 MODULE_DESCRIPTION(DRIVER_DESC);
511 MODULE_LICENSE("GPL");
Linux with added FPC-III support