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Merge branch 'media_fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab...
[cris-mirror.git] / drivers / media / rc / winbond-cir.c
blob186de55220013e8b0ea19dd726a97e7a07e8b17b
1 /*
2 * winbond-cir.c - Driver for the Consumer IR functionality of Winbond
3 * SuperI/O chips.
4 *
5 * Currently supports the Winbond WPCD376i chip (PNP id WEC1022), but
6 * could probably support others (Winbond WEC102X, NatSemi, etc)
7 * with minor modifications.
8 *
9 * Original Author: David Härdeman <david@hardeman.nu>
10 * Copyright (C) 2009 - 2010 David Härdeman <david@hardeman.nu>
11 *
12 * Dedicated to my daughter Matilda, without whose loving attention this
13 * driver would have been finished in half the time and with a fraction
14 * of the bugs.
15 *
16 * Written using:
17 * o Winbond WPCD376I datasheet helpfully provided by Jesse Barnes at Intel
18 * o NatSemi PC87338/PC97338 datasheet (for the serial port stuff)
19 * o DSDT dumps
20 *
21 * Supported features:
22 * o Wake-On-CIR functionality
23 *
24 * To do:
25 * o Learning
26 * o IR Transmit
27 *
28 * This program is free software; you can redistribute it and/or modify
29 * it under the terms of the GNU General Public License as published by
30 * the Free Software Foundation; either version 2 of the License, or
31 * (at your option) any later version.
32 *
33 * This program is distributed in the hope that it will be useful,
34 * but WITHOUT ANY WARRANTY; without even the implied warranty of
35 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
36 * GNU General Public License for more details.
37 *
38 * You should have received a copy of the GNU General Public License
39 * along with this program; if not, write to the Free Software
40 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
41 */
42
43 #include <linux/module.h>
44 #include <linux/pnp.h>
45 #include <linux/interrupt.h>
46 #include <linux/timer.h>
47 #include <linux/leds.h>
48 #include <linux/spinlock.h>
49 #include <linux/pci_ids.h>
50 #include <linux/io.h>
51 #include <linux/bitrev.h>
52 #include <linux/slab.h>
53 #include <media/rc-core.h>
54
55 #define DRVNAME "winbond-cir"
56
57 /* CEIR Wake-Up Registers, relative to data->wbase */
58 #define WBCIR_REG_WCEIR_CTL 0x03 /* CEIR Receiver Control */
59 #define WBCIR_REG_WCEIR_STS 0x04 /* CEIR Receiver Status */
60 #define WBCIR_REG_WCEIR_EV_EN 0x05 /* CEIR Receiver Event Enable */
61 #define WBCIR_REG_WCEIR_CNTL 0x06 /* CEIR Receiver Counter Low */
62 #define WBCIR_REG_WCEIR_CNTH 0x07 /* CEIR Receiver Counter High */
63 #define WBCIR_REG_WCEIR_INDEX 0x08 /* CEIR Receiver Index */
64 #define WBCIR_REG_WCEIR_DATA 0x09 /* CEIR Receiver Data */
65 #define WBCIR_REG_WCEIR_CSL 0x0A /* CEIR Re. Compare Strlen */
66 #define WBCIR_REG_WCEIR_CFG1 0x0B /* CEIR Re. Configuration 1 */
67 #define WBCIR_REG_WCEIR_CFG2 0x0C /* CEIR Re. Configuration 2 */
68
69 /* CEIR Enhanced Functionality Registers, relative to data->ebase */
70 #define WBCIR_REG_ECEIR_CTS 0x00 /* Enhanced IR Control Status */
71 #define WBCIR_REG_ECEIR_CCTL 0x01 /* Infrared Counter Control */
72 #define WBCIR_REG_ECEIR_CNT_LO 0x02 /* Infrared Counter LSB */
73 #define WBCIR_REG_ECEIR_CNT_HI 0x03 /* Infrared Counter MSB */
74 #define WBCIR_REG_ECEIR_IREM 0x04 /* Infrared Emitter Status */
75
76 /* SP3 Banked Registers, relative to data->sbase */
77 #define WBCIR_REG_SP3_BSR 0x03 /* Bank Select, all banks */
78 /* Bank 0 */
79 #define WBCIR_REG_SP3_RXDATA 0x00 /* FIFO RX data (r) */
80 #define WBCIR_REG_SP3_TXDATA 0x00 /* FIFO TX data (w) */
81 #define WBCIR_REG_SP3_IER 0x01 /* Interrupt Enable */
82 #define WBCIR_REG_SP3_EIR 0x02 /* Event Identification (r) */
83 #define WBCIR_REG_SP3_FCR 0x02 /* FIFO Control (w) */
84 #define WBCIR_REG_SP3_MCR 0x04 /* Mode Control */
85 #define WBCIR_REG_SP3_LSR 0x05 /* Link Status */
86 #define WBCIR_REG_SP3_MSR 0x06 /* Modem Status */
87 #define WBCIR_REG_SP3_ASCR 0x07 /* Aux Status and Control */
88 /* Bank 2 */
89 #define WBCIR_REG_SP3_BGDL 0x00 /* Baud Divisor LSB */
90 #define WBCIR_REG_SP3_BGDH 0x01 /* Baud Divisor MSB */
91 #define WBCIR_REG_SP3_EXCR1 0x02 /* Extended Control 1 */
92 #define WBCIR_REG_SP3_EXCR2 0x04 /* Extended Control 2 */
93 #define WBCIR_REG_SP3_TXFLV 0x06 /* TX FIFO Level */
94 #define WBCIR_REG_SP3_RXFLV 0x07 /* RX FIFO Level */
95 /* Bank 3 */
96 #define WBCIR_REG_SP3_MRID 0x00 /* Module Identification */
97 #define WBCIR_REG_SP3_SH_LCR 0x01 /* LCR Shadow */
98 #define WBCIR_REG_SP3_SH_FCR 0x02 /* FCR Shadow */
99 /* Bank 4 */
100 #define WBCIR_REG_SP3_IRCR1 0x02 /* Infrared Control 1 */
101 /* Bank 5 */
102 #define WBCIR_REG_SP3_IRCR2 0x04 /* Infrared Control 2 */
103 /* Bank 6 */
104 #define WBCIR_REG_SP3_IRCR3 0x00 /* Infrared Control 3 */
105 #define WBCIR_REG_SP3_SIR_PW 0x02 /* SIR Pulse Width */
106 /* Bank 7 */
107 #define WBCIR_REG_SP3_IRRXDC 0x00 /* IR RX Demod Control */
108 #define WBCIR_REG_SP3_IRTXMC 0x01 /* IR TX Mod Control */
109 #define WBCIR_REG_SP3_RCCFG 0x02 /* CEIR Config */
110 #define WBCIR_REG_SP3_IRCFG1 0x04 /* Infrared Config 1 */
111 #define WBCIR_REG_SP3_IRCFG4 0x07 /* Infrared Config 4 */
112
113 /*
114 * Magic values follow
115 */
116
117 /* No interrupts for WBCIR_REG_SP3_IER and WBCIR_REG_SP3_EIR */
118 #define WBCIR_IRQ_NONE 0x00
119 /* RX data bit for WBCIR_REG_SP3_IER and WBCIR_REG_SP3_EIR */
120 #define WBCIR_IRQ_RX 0x01
121 /* Over/Under-flow bit for WBCIR_REG_SP3_IER and WBCIR_REG_SP3_EIR */
122 #define WBCIR_IRQ_ERR 0x04
123 /* Led enable/disable bit for WBCIR_REG_ECEIR_CTS */
124 #define WBCIR_LED_ENABLE 0x80
125 /* RX data available bit for WBCIR_REG_SP3_LSR */
126 #define WBCIR_RX_AVAIL 0x01
127 /* RX disable bit for WBCIR_REG_SP3_ASCR */
128 #define WBCIR_RX_DISABLE 0x20
129 /* Extended mode enable bit for WBCIR_REG_SP3_EXCR1 */
130 #define WBCIR_EXT_ENABLE 0x01
131 /* Select compare register in WBCIR_REG_WCEIR_INDEX (bits 5 & 6) */
132 #define WBCIR_REGSEL_COMPARE 0x10
133 /* Select mask register in WBCIR_REG_WCEIR_INDEX (bits 5 & 6) */
134 #define WBCIR_REGSEL_MASK 0x20
135 /* Starting address of selected register in WBCIR_REG_WCEIR_INDEX */
136 #define WBCIR_REG_ADDR0 0x00
137
138 /* Valid banks for the SP3 UART */
139 enum wbcir_bank {
140 WBCIR_BANK_0 = 0x00,
141 WBCIR_BANK_1 = 0x80,
142 WBCIR_BANK_2 = 0xE0,
143 WBCIR_BANK_3 = 0xE4,
144 WBCIR_BANK_4 = 0xE8,
145 WBCIR_BANK_5 = 0xEC,
146 WBCIR_BANK_6 = 0xF0,
147 WBCIR_BANK_7 = 0xF4,
148 };
149
150 /* Supported power-on IR Protocols */
151 enum wbcir_protocol {
152 IR_PROTOCOL_RC5 = 0x0,
153 IR_PROTOCOL_NEC = 0x1,
154 IR_PROTOCOL_RC6 = 0x2,
155 };
156
157 /* Misc */
158 #define WBCIR_NAME "Winbond CIR"
159 #define WBCIR_ID_FAMILY 0xF1 /* Family ID for the WPCD376I */
160 #define WBCIR_ID_CHIP 0x04 /* Chip ID for the WPCD376I */
161 #define INVALID_SCANCODE 0x7FFFFFFF /* Invalid with all protos */
162 #define WAKEUP_IOMEM_LEN 0x10 /* Wake-Up I/O Reg Len */
163 #define EHFUNC_IOMEM_LEN 0x10 /* Enhanced Func I/O Reg Len */
164 #define SP_IOMEM_LEN 0x08 /* Serial Port 3 (IR) Reg Len */
165
166 /* Per-device data */
167 struct wbcir_data {
168 spinlock_t spinlock;
169
170 unsigned long wbase; /* Wake-Up Baseaddr */
171 unsigned long ebase; /* Enhanced Func. Baseaddr */
172 unsigned long sbase; /* Serial Port Baseaddr */
173 unsigned int irq; /* Serial Port IRQ */
174
175 struct rc_dev *dev;
176
177 struct led_trigger *rxtrigger;
178 struct led_trigger *txtrigger;
179 struct led_classdev led;
180
181 /* RX irdata state */
182 bool irdata_active;
183 bool irdata_error;
184 struct ir_raw_event ev;
185 };
186
187 static enum wbcir_protocol protocol = IR_PROTOCOL_RC6;
188 module_param(protocol, uint, 0444);
189 MODULE_PARM_DESC(protocol, "IR protocol to use for the power-on command "
190 "(0 = RC5, 1 = NEC, 2 = RC6A, default)");
191
192 static int invert; /* default = 0 */
193 module_param(invert, bool, 0444);
194 MODULE_PARM_DESC(invert, "Invert the signal from the IR receiver");
195
196 static unsigned int wake_sc = 0x800F040C;
197 module_param(wake_sc, uint, 0644);
198 MODULE_PARM_DESC(wake_sc, "Scancode of the power-on IR command");
199
200 static unsigned int wake_rc6mode = 6;
201 module_param(wake_rc6mode, uint, 0644);
202 MODULE_PARM_DESC(wake_rc6mode, "RC6 mode for the power-on command "
203 "(0 = 0, 6 = 6A, default)");
204
205
206
207 /*****************************************************************************
208 *
209 * UTILITY FUNCTIONS
210 *
211 *****************************************************************************/
212
213 /* Caller needs to hold wbcir_lock */
214 static void
215 wbcir_set_bits(unsigned long addr, u8 bits, u8 mask)
216 {
217 u8 val;
218
219 val = inb(addr);
220 val = ((val & ~mask) | (bits & mask));
221 outb(val, addr);
222 }
223
224 /* Selects the register bank for the serial port */
225 static inline void
226 wbcir_select_bank(struct wbcir_data *data, enum wbcir_bank bank)
227 {
228 outb(bank, data->sbase + WBCIR_REG_SP3_BSR);
229 }
230
231 static enum led_brightness
232 wbcir_led_brightness_get(struct led_classdev *led_cdev)
233 {
234 struct wbcir_data *data = container_of(led_cdev,
235 struct wbcir_data,
236 led);
237
238 if (inb(data->ebase + WBCIR_REG_ECEIR_CTS) & WBCIR_LED_ENABLE)
239 return LED_FULL;
240 else
241 return LED_OFF;
242 }
243
244 static void
245 wbcir_led_brightness_set(struct led_classdev *led_cdev,
246 enum led_brightness brightness)
247 {
248 struct wbcir_data *data = container_of(led_cdev,
249 struct wbcir_data,
250 led);
251
252 wbcir_set_bits(data->ebase + WBCIR_REG_ECEIR_CTS,
253 brightness == LED_OFF ? 0x00 : WBCIR_LED_ENABLE,
254 WBCIR_LED_ENABLE);
255 }
256
257 /* Manchester encodes bits to RC6 message cells (see wbcir_shutdown) */
258 static u8
259 wbcir_to_rc6cells(u8 val)
260 {
261 u8 coded = 0x00;
262 int i;
263
264 val &= 0x0F;
265 for (i = 0; i < 4; i++) {
266 if (val & 0x01)
267 coded |= 0x02 << (i * 2);
268 else
269 coded |= 0x01 << (i * 2);
270 val >>= 1;
271 }
272
273 return coded;
274 }
275
276 /*****************************************************************************
277 *
278 * INTERRUPT FUNCTIONS
279 *
280 *****************************************************************************/
281
282 static irqreturn_t
283 wbcir_irq_handler(int irqno, void *cookie)
284 {
285 struct pnp_dev *device = cookie;
286 struct wbcir_data *data = pnp_get_drvdata(device);
287 unsigned long flags;
288 u8 irdata[8];
289 u8 disable = true;
290 u8 status;
291 int i;
292
293 spin_lock_irqsave(&data->spinlock, flags);
294
295 wbcir_select_bank(data, WBCIR_BANK_0);
296
297 status = inb(data->sbase + WBCIR_REG_SP3_EIR);
298
299 if (!(status & (WBCIR_IRQ_RX | WBCIR_IRQ_ERR))) {
300 spin_unlock_irqrestore(&data->spinlock, flags);
301 return IRQ_NONE;
302 }
303
304 /* Check for e.g. buffer overflow */
305 if (status & WBCIR_IRQ_ERR) {
306 data->irdata_error = true;
307 ir_raw_event_reset(data->dev);
308 }
309
310 if (!(status & WBCIR_IRQ_RX))
311 goto out;
312
313 if (!data->irdata_active) {
314 data->irdata_active = true;
315 led_trigger_event(data->rxtrigger, LED_FULL);
316 }
317
318 /* Since RXHDLEV is set, at least 8 bytes are in the FIFO */
319 insb(data->sbase + WBCIR_REG_SP3_RXDATA, &irdata[0], 8);
320
321 for (i = 0; i < 8; i++) {
322 u8 pulse;
323 u32 duration;
324
325 if (irdata[i] != 0xFF && irdata[i] != 0x00)
326 disable = false;
327
328 if (data->irdata_error)
329 continue;
330
331 pulse = irdata[i] & 0x80 ? false : true;
332 duration = (irdata[i] & 0x7F) * 10000; /* ns */
333
334 if (data->ev.pulse != pulse) {
335 if (data->ev.duration != 0) {
336 ir_raw_event_store(data->dev, &data->ev);
337 data->ev.duration = 0;
338 }
339
340 data->ev.pulse = pulse;
341 }
342
343 data->ev.duration += duration;
344 }
345
346 if (disable) {
347 if (data->ev.duration != 0 && !data->irdata_error) {
348 ir_raw_event_store(data->dev, &data->ev);
349 data->ev.duration = 0;
350 }
351
352 /* Set RXINACTIVE */
353 outb(WBCIR_RX_DISABLE, data->sbase + WBCIR_REG_SP3_ASCR);
354
355 /* Drain the FIFO */
356 while (inb(data->sbase + WBCIR_REG_SP3_LSR) & WBCIR_RX_AVAIL)
357 inb(data->sbase + WBCIR_REG_SP3_RXDATA);
358
359 ir_raw_event_reset(data->dev);
360 data->irdata_error = false;
361 data->irdata_active = false;
362 led_trigger_event(data->rxtrigger, LED_OFF);
363 }
364
365 ir_raw_event_handle(data->dev);
366
367 out:
368 spin_unlock_irqrestore(&data->spinlock, flags);
369 return IRQ_HANDLED;
370 }
371
372
373
374 /*****************************************************************************
375 *
376 * SETUP/INIT/SUSPEND/RESUME FUNCTIONS
377 *
378 *****************************************************************************/
379
380 static void
381 wbcir_shutdown(struct pnp_dev *device)
382 {
383 struct device *dev = &device->dev;
384 struct wbcir_data *data = pnp_get_drvdata(device);
385 int do_wake = 1;
386 u8 match[11];
387 u8 mask[11];
388 u8 rc6_csl = 0;
389 int i;
390
391 memset(match, 0, sizeof(match));
392 memset(mask, 0, sizeof(mask));
393
394 if (wake_sc == INVALID_SCANCODE || !device_may_wakeup(dev)) {
395 do_wake = 0;
396 goto finish;
397 }
398
399 switch (protocol) {
400 case IR_PROTOCOL_RC5:
401 if (wake_sc > 0xFFF) {
402 do_wake = 0;
403 dev_err(dev, "RC5 - Invalid wake scancode\n");
404 break;
405 }
406
407 /* Mask = 13 bits, ex toggle */
408 mask[0] = 0xFF;
409 mask[1] = 0x17;
410
411 match[0] = (wake_sc & 0x003F); /* 6 command bits */
412 match[0] |= (wake_sc & 0x0180) >> 1; /* 2 address bits */
413 match[1] = (wake_sc & 0x0E00) >> 9; /* 3 address bits */
414 if (!(wake_sc & 0x0040)) /* 2nd start bit */
415 match[1] |= 0x10;
416
417 break;
418
419 case IR_PROTOCOL_NEC:
420 if (wake_sc > 0xFFFFFF) {
421 do_wake = 0;
422 dev_err(dev, "NEC - Invalid wake scancode\n");
423 break;
424 }
425
426 mask[0] = mask[1] = mask[2] = mask[3] = 0xFF;
427
428 match[1] = bitrev8((wake_sc & 0xFF));
429 match[0] = ~match[1];
430
431 match[3] = bitrev8((wake_sc & 0xFF00) >> 8);
432 if (wake_sc > 0xFFFF)
433 match[2] = bitrev8((wake_sc & 0xFF0000) >> 16);
434 else
435 match[2] = ~match[3];
436
437 break;
438
439 case IR_PROTOCOL_RC6:
440
441 if (wake_rc6mode == 0) {
442 if (wake_sc > 0xFFFF) {
443 do_wake = 0;
444 dev_err(dev, "RC6 - Invalid wake scancode\n");
445 break;
446 }
447
448 /* Command */
449 match[0] = wbcir_to_rc6cells(wake_sc >> 0);
450 mask[0] = 0xFF;
451 match[1] = wbcir_to_rc6cells(wake_sc >> 4);
452 mask[1] = 0xFF;
453
454 /* Address */
455 match[2] = wbcir_to_rc6cells(wake_sc >> 8);
456 mask[2] = 0xFF;
457 match[3] = wbcir_to_rc6cells(wake_sc >> 12);
458 mask[3] = 0xFF;
459
460 /* Header */
461 match[4] = 0x50; /* mode1 = mode0 = 0, ignore toggle */
462 mask[4] = 0xF0;
463 match[5] = 0x09; /* start bit = 1, mode2 = 0 */
464 mask[5] = 0x0F;
465
466 rc6_csl = 44;
467
468 } else if (wake_rc6mode == 6) {
469 i = 0;
470
471 /* Command */
472 match[i] = wbcir_to_rc6cells(wake_sc >> 0);
473 mask[i++] = 0xFF;
474 match[i] = wbcir_to_rc6cells(wake_sc >> 4);
475 mask[i++] = 0xFF;
476
477 /* Address + Toggle */
478 match[i] = wbcir_to_rc6cells(wake_sc >> 8);
479 mask[i++] = 0xFF;
480 match[i] = wbcir_to_rc6cells(wake_sc >> 12);
481 mask[i++] = 0x3F;
482
483 /* Customer bits 7 - 0 */
484 match[i] = wbcir_to_rc6cells(wake_sc >> 16);
485 mask[i++] = 0xFF;
486 match[i] = wbcir_to_rc6cells(wake_sc >> 20);
487 mask[i++] = 0xFF;
488
489 if (wake_sc & 0x80000000) {
490 /* Customer range bit and bits 15 - 8 */
491 match[i] = wbcir_to_rc6cells(wake_sc >> 24);
492 mask[i++] = 0xFF;
493 match[i] = wbcir_to_rc6cells(wake_sc >> 28);
494 mask[i++] = 0xFF;
495 rc6_csl = 76;
496 } else if (wake_sc <= 0x007FFFFF) {
497 rc6_csl = 60;
498 } else {
499 do_wake = 0;
500 dev_err(dev, "RC6 - Invalid wake scancode\n");
501 break;
502 }
503
504 /* Header */
505 match[i] = 0x93; /* mode1 = mode0 = 1, submode = 0 */
506 mask[i++] = 0xFF;
507 match[i] = 0x0A; /* start bit = 1, mode2 = 1 */
508 mask[i++] = 0x0F;
509
510 } else {
511 do_wake = 0;
512 dev_err(dev, "RC6 - Invalid wake mode\n");
513 }
514
515 break;
516
517 default:
518 do_wake = 0;
519 break;
520 }
521
522 finish:
523 if (do_wake) {
524 /* Set compare and compare mask */
525 wbcir_set_bits(data->wbase + WBCIR_REG_WCEIR_INDEX,
526 WBCIR_REGSEL_COMPARE | WBCIR_REG_ADDR0,
527 0x3F);
528 outsb(data->wbase + WBCIR_REG_WCEIR_DATA, match, 11);
529 wbcir_set_bits(data->wbase + WBCIR_REG_WCEIR_INDEX,
530 WBCIR_REGSEL_MASK | WBCIR_REG_ADDR0,
531 0x3F);
532 outsb(data->wbase + WBCIR_REG_WCEIR_DATA, mask, 11);
533
534 /* RC6 Compare String Len */
535 outb(rc6_csl, data->wbase + WBCIR_REG_WCEIR_CSL);
536
537 /* Clear status bits NEC_REP, BUFF, MSG_END, MATCH */
538 wbcir_set_bits(data->wbase + WBCIR_REG_WCEIR_STS, 0x17, 0x17);
539
540 /* Clear BUFF_EN, Clear END_EN, Set MATCH_EN */
541 wbcir_set_bits(data->wbase + WBCIR_REG_WCEIR_EV_EN, 0x01, 0x07);
542
543 /* Set CEIR_EN */
544 wbcir_set_bits(data->wbase + WBCIR_REG_WCEIR_CTL, 0x01, 0x01);
545
546 } else {
547 /* Clear BUFF_EN, Clear END_EN, Clear MATCH_EN */
548 wbcir_set_bits(data->wbase + WBCIR_REG_WCEIR_EV_EN, 0x00, 0x07);
549
550 /* Clear CEIR_EN */
551 wbcir_set_bits(data->wbase + WBCIR_REG_WCEIR_CTL, 0x00, 0x01);
552 }
553
554 /* Disable interrupts */
555 wbcir_select_bank(data, WBCIR_BANK_0);
556 outb(WBCIR_IRQ_NONE, data->sbase + WBCIR_REG_SP3_IER);
557
558 /* Disable LED */
559 data->irdata_active = false;
560 led_trigger_event(data->rxtrigger, LED_OFF);
561
562 /*
563 * ACPI will set the HW disable bit for SP3 which means that the
564 * output signals are left in an undefined state which may cause
565 * spurious interrupts which we need to ignore until the hardware
566 * is reinitialized.
567 */
568 disable_irq(data->irq);
569 }
570
571 static int
572 wbcir_suspend(struct pnp_dev *device, pm_message_t state)
573 {
574 wbcir_shutdown(device);
575 return 0;
576 }
577
578 static void
579 wbcir_init_hw(struct wbcir_data *data)
580 {
581 u8 tmp;
582
583 /* Disable interrupts */
584 wbcir_select_bank(data, WBCIR_BANK_0);
585 outb(WBCIR_IRQ_NONE, data->sbase + WBCIR_REG_SP3_IER);
586
587 /* Set PROT_SEL, RX_INV, Clear CEIR_EN (needed for the led) */
588 tmp = protocol << 4;
589 if (invert)
590 tmp |= 0x08;
591 outb(tmp, data->wbase + WBCIR_REG_WCEIR_CTL);
592
593 /* Clear status bits NEC_REP, BUFF, MSG_END, MATCH */
594 wbcir_set_bits(data->wbase + WBCIR_REG_WCEIR_STS, 0x17, 0x17);
595
596 /* Clear BUFF_EN, Clear END_EN, Clear MATCH_EN */
597 wbcir_set_bits(data->wbase + WBCIR_REG_WCEIR_EV_EN, 0x00, 0x07);
598
599 /* Set RC5 cell time to correspond to 36 kHz */
600 wbcir_set_bits(data->wbase + WBCIR_REG_WCEIR_CFG1, 0x4A, 0x7F);
601
602 /* Set IRTX_INV */
603 if (invert)
604 outb(0x04, data->ebase + WBCIR_REG_ECEIR_CCTL);
605 else
606 outb(0x00, data->ebase + WBCIR_REG_ECEIR_CCTL);
607
608 /*
609 * Clear IR LED, set SP3 clock to 24Mhz
610 * set SP3_IRRX_SW to binary 01, helpfully not documented
611 */
612 outb(0x10, data->ebase + WBCIR_REG_ECEIR_CTS);
613
614 /* Enable extended mode */
615 wbcir_select_bank(data, WBCIR_BANK_2);
616 outb(WBCIR_EXT_ENABLE, data->sbase + WBCIR_REG_SP3_EXCR1);
617
618 /*
619 * Configure baud generator, IR data will be sampled at
620 * a bitrate of: (24Mhz * prescaler) / (divisor * 16).
621 *
622 * The ECIR registers include a flag to change the
623 * 24Mhz clock freq to 48Mhz.
624 *
625 * It's not documented in the specs, but fifo levels
626 * other than 16 seems to be unsupported.
627 */
628
629 /* prescaler 1.0, tx/rx fifo lvl 16 */
630 outb(0x30, data->sbase + WBCIR_REG_SP3_EXCR2);
631
632 /* Set baud divisor to generate one byte per bit/cell */
633 switch (protocol) {
634 case IR_PROTOCOL_RC5:
635 outb(0xA7, data->sbase + WBCIR_REG_SP3_BGDL);
636 break;
637 case IR_PROTOCOL_RC6:
638 outb(0x53, data->sbase + WBCIR_REG_SP3_BGDL);
639 break;
640 case IR_PROTOCOL_NEC:
641 outb(0x69, data->sbase + WBCIR_REG_SP3_BGDL);
642 break;
643 }
644 outb(0x00, data->sbase + WBCIR_REG_SP3_BGDH);
645
646 /* Set CEIR mode */
647 wbcir_select_bank(data, WBCIR_BANK_0);
648 outb(0xC0, data->sbase + WBCIR_REG_SP3_MCR);
649 inb(data->sbase + WBCIR_REG_SP3_LSR); /* Clear LSR */
650 inb(data->sbase + WBCIR_REG_SP3_MSR); /* Clear MSR */
651
652 /* Disable RX demod, run-length encoding/decoding, set freq span */
653 wbcir_select_bank(data, WBCIR_BANK_7);
654 outb(0x10, data->sbase + WBCIR_REG_SP3_RCCFG);
655
656 /* Disable timer */
657 wbcir_select_bank(data, WBCIR_BANK_4);
658 outb(0x00, data->sbase + WBCIR_REG_SP3_IRCR1);
659
660 /* Enable MSR interrupt, Clear AUX_IRX */
661 wbcir_select_bank(data, WBCIR_BANK_5);
662 outb(0x00, data->sbase + WBCIR_REG_SP3_IRCR2);
663
664 /* Disable CRC */
665 wbcir_select_bank(data, WBCIR_BANK_6);
666 outb(0x20, data->sbase + WBCIR_REG_SP3_IRCR3);
667
668 /* Set RX/TX (de)modulation freq, not really used */
669 wbcir_select_bank(data, WBCIR_BANK_7);
670 outb(0xF2, data->sbase + WBCIR_REG_SP3_IRRXDC);
671 outb(0x69, data->sbase + WBCIR_REG_SP3_IRTXMC);
672
673 /* Set invert and pin direction */
674 if (invert)
675 outb(0x10, data->sbase + WBCIR_REG_SP3_IRCFG4);
676 else
677 outb(0x00, data->sbase + WBCIR_REG_SP3_IRCFG4);
678
679 /* Set FIFO thresholds (RX = 8, TX = 3), reset RX/TX */
680 wbcir_select_bank(data, WBCIR_BANK_0);
681 outb(0x97, data->sbase + WBCIR_REG_SP3_FCR);
682
683 /* Clear AUX status bits */
684 outb(0xE0, data->sbase + WBCIR_REG_SP3_ASCR);
685
686 /* Clear IR decoding state */
687 data->irdata_active = false;
688 led_trigger_event(data->rxtrigger, LED_OFF);
689 data->irdata_error = false;
690 data->ev.duration = 0;
691 ir_raw_event_reset(data->dev);
692 ir_raw_event_handle(data->dev);
693
694 /* Enable interrupts */
695 outb(WBCIR_IRQ_RX | WBCIR_IRQ_ERR, data->sbase + WBCIR_REG_SP3_IER);
696 }
697
698 static int
699 wbcir_resume(struct pnp_dev *device)
700 {
701 struct wbcir_data *data = pnp_get_drvdata(device);
702
703 wbcir_init_hw(data);
704 enable_irq(data->irq);
705
706 return 0;
707 }
708
709 static int __devinit
710 wbcir_probe(struct pnp_dev *device, const struct pnp_device_id *dev_id)
711 {
712 struct device *dev = &device->dev;
713 struct wbcir_data *data;
714 int err;
715
716 if (!(pnp_port_len(device, 0) == EHFUNC_IOMEM_LEN &&
717 pnp_port_len(device, 1) == WAKEUP_IOMEM_LEN &&
718 pnp_port_len(device, 2) == SP_IOMEM_LEN)) {
719 dev_err(dev, "Invalid resources\n");
720 return -ENODEV;
721 }
722
723 data = kzalloc(sizeof(*data), GFP_KERNEL);
724 if (!data) {
725 err = -ENOMEM;
726 goto exit;
727 }
728
729 pnp_set_drvdata(device, data);
730
731 spin_lock_init(&data->spinlock);
732 data->ebase = pnp_port_start(device, 0);
733 data->wbase = pnp_port_start(device, 1);
734 data->sbase = pnp_port_start(device, 2);
735 data->irq = pnp_irq(device, 0);
736
737 if (data->wbase == 0 || data->ebase == 0 ||
738 data->sbase == 0 || data->irq == 0) {
739 err = -ENODEV;
740 dev_err(dev, "Invalid resources\n");
741 goto exit_free_data;
742 }
743
744 dev_dbg(&device->dev, "Found device "
745 "(w: 0x%lX, e: 0x%lX, s: 0x%lX, i: %u)\n",
746 data->wbase, data->ebase, data->sbase, data->irq);
747
748 if (!request_region(data->wbase, WAKEUP_IOMEM_LEN, DRVNAME)) {
749 dev_err(dev, "Region 0x%lx-0x%lx already in use!\n",
750 data->wbase, data->wbase + WAKEUP_IOMEM_LEN - 1);
751 err = -EBUSY;
752 goto exit_free_data;
753 }
754
755 if (!request_region(data->ebase, EHFUNC_IOMEM_LEN, DRVNAME)) {
756 dev_err(dev, "Region 0x%lx-0x%lx already in use!\n",
757 data->ebase, data->ebase + EHFUNC_IOMEM_LEN - 1);
758 err = -EBUSY;
759 goto exit_release_wbase;
760 }
761
762 if (!request_region(data->sbase, SP_IOMEM_LEN, DRVNAME)) {
763 dev_err(dev, "Region 0x%lx-0x%lx already in use!\n",
764 data->sbase, data->sbase + SP_IOMEM_LEN - 1);
765 err = -EBUSY;
766 goto exit_release_ebase;
767 }
768
769 err = request_irq(data->irq, wbcir_irq_handler,
770 IRQF_DISABLED, DRVNAME, device);
771 if (err) {
772 dev_err(dev, "Failed to claim IRQ %u\n", data->irq);
773 err = -EBUSY;
774 goto exit_release_sbase;
775 }
776
777 led_trigger_register_simple("cir-tx", &data->txtrigger);
778 if (!data->txtrigger) {
779 err = -ENOMEM;
780 goto exit_free_irq;
781 }
782
783 led_trigger_register_simple("cir-rx", &data->rxtrigger);
784 if (!data->rxtrigger) {
785 err = -ENOMEM;
786 goto exit_unregister_txtrigger;
787 }
788
789 data->led.name = "cir::activity";
790 data->led.default_trigger = "cir-rx";
791 data->led.brightness_set = wbcir_led_brightness_set;
792 data->led.brightness_get = wbcir_led_brightness_get;
793 err = led_classdev_register(&device->dev, &data->led);
794 if (err)
795 goto exit_unregister_rxtrigger;
796
797 data->dev = rc_allocate_device();
798 if (!data->dev) {
799 err = -ENOMEM;
800 goto exit_unregister_led;
801 }
802
803 data->dev->driver_name = WBCIR_NAME;
804 data->dev->input_name = WBCIR_NAME;
805 data->dev->input_phys = "wbcir/cir0";
806 data->dev->input_id.bustype = BUS_HOST;
807 data->dev->input_id.vendor = PCI_VENDOR_ID_WINBOND;
808 data->dev->input_id.product = WBCIR_ID_FAMILY;
809 data->dev->input_id.version = WBCIR_ID_CHIP;
810 data->dev->priv = data;
811 data->dev->dev.parent = &device->dev;
812
813 err = rc_register_device(data->dev);
814 if (err)
815 goto exit_free_rc;
816
817 device_init_wakeup(&device->dev, 1);
818
819 wbcir_init_hw(data);
820
821 return 0;
822
823 exit_free_rc:
824 rc_free_device(data->dev);
825 exit_unregister_led:
826 led_classdev_unregister(&data->led);
827 exit_unregister_rxtrigger:
828 led_trigger_unregister_simple(data->rxtrigger);
829 exit_unregister_txtrigger:
830 led_trigger_unregister_simple(data->txtrigger);
831 exit_free_irq:
832 free_irq(data->irq, device);
833 exit_release_sbase:
834 release_region(data->sbase, SP_IOMEM_LEN);
835 exit_release_ebase:
836 release_region(data->ebase, EHFUNC_IOMEM_LEN);
837 exit_release_wbase:
838 release_region(data->wbase, WAKEUP_IOMEM_LEN);
839 exit_free_data:
840 kfree(data);
841 pnp_set_drvdata(device, NULL);
842 exit:
843 return err;
844 }
845
846 static void __devexit
847 wbcir_remove(struct pnp_dev *device)
848 {
849 struct wbcir_data *data = pnp_get_drvdata(device);
850
851 /* Disable interrupts */
852 wbcir_select_bank(data, WBCIR_BANK_0);
853 outb(WBCIR_IRQ_NONE, data->sbase + WBCIR_REG_SP3_IER);
854
855 free_irq(data->irq, device);
856
857 /* Clear status bits NEC_REP, BUFF, MSG_END, MATCH */
858 wbcir_set_bits(data->wbase + WBCIR_REG_WCEIR_STS, 0x17, 0x17);
859
860 /* Clear CEIR_EN */
861 wbcir_set_bits(data->wbase + WBCIR_REG_WCEIR_CTL, 0x00, 0x01);
862
863 /* Clear BUFF_EN, END_EN, MATCH_EN */
864 wbcir_set_bits(data->wbase + WBCIR_REG_WCEIR_EV_EN, 0x00, 0x07);
865
866 rc_unregister_device(data->dev);
867
868 led_trigger_unregister_simple(data->rxtrigger);
869 led_trigger_unregister_simple(data->txtrigger);
870 led_classdev_unregister(&data->led);
871
872 /* This is ok since &data->led isn't actually used */
873 wbcir_led_brightness_set(&data->led, LED_OFF);
874
875 release_region(data->wbase, WAKEUP_IOMEM_LEN);
876 release_region(data->ebase, EHFUNC_IOMEM_LEN);
877 release_region(data->sbase, SP_IOMEM_LEN);
878
879 kfree(data);
880
881 pnp_set_drvdata(device, NULL);
882 }
883
884 static const struct pnp_device_id wbcir_ids[] = {
885 { "WEC1022", 0 },
886 { "", 0 }
887 };
888 MODULE_DEVICE_TABLE(pnp, wbcir_ids);
889
890 static struct pnp_driver wbcir_driver = {
891 .name = WBCIR_NAME,
892 .id_table = wbcir_ids,
893 .probe = wbcir_probe,
894 .remove = __devexit_p(wbcir_remove),
895 .suspend = wbcir_suspend,
896 .resume = wbcir_resume,
897 .shutdown = wbcir_shutdown
898 };
899
900 static int __init
901 wbcir_init(void)
902 {
903 int ret;
904
905 switch (protocol) {
906 case IR_PROTOCOL_RC5:
907 case IR_PROTOCOL_NEC:
908 case IR_PROTOCOL_RC6:
909 break;
910 default:
911 printk(KERN_ERR DRVNAME ": Invalid power-on protocol\n");
912 }
913
914 ret = pnp_register_driver(&wbcir_driver);
915 if (ret)
916 printk(KERN_ERR DRVNAME ": Unable to register driver\n");
917
918 return ret;
919 }
920
921 static void __exit
922 wbcir_exit(void)
923 {
924 pnp_unregister_driver(&wbcir_driver);
925 }
926
927 module_init(wbcir_init);
928 module_exit(wbcir_exit);
929
930 MODULE_AUTHOR("David Härdeman <david@hardeman.nu>");
931 MODULE_DESCRIPTION("Winbond SuperI/O Consumer IR Driver");
932 MODULE_LICENSE("GPL");
CRIS linux kernel tree