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Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux...
[deliverable/linux.git] / drivers / media / rc / winbond-cir.c
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) 2012 Sean Young <sean@mess.org>
11 * Copyright (C) 2009 - 2011 David Härdeman <david@hardeman.nu>
12 *
13 * Dedicated to my daughter Matilda, without whose loving attention this
14 * driver would have been finished in half the time and with a fraction
15 * of the bugs.
16 *
17 * Written using:
18 * o Winbond WPCD376I datasheet helpfully provided by Jesse Barnes at Intel
19 * o NatSemi PC87338/PC97338 datasheet (for the serial port stuff)
20 * o DSDT dumps
21 *
22 * Supported features:
23 * o IR Receive
24 * o IR Transmit
25 * o Wake-On-CIR functionality
26 * o Carrier detection
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 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
44
45 #include <linux/module.h>
46 #include <linux/pnp.h>
47 #include <linux/interrupt.h>
48 #include <linux/timer.h>
49 #include <linux/leds.h>
50 #include <linux/spinlock.h>
51 #include <linux/pci_ids.h>
52 #include <linux/io.h>
53 #include <linux/bitrev.h>
54 #include <linux/slab.h>
55 #include <linux/wait.h>
56 #include <linux/sched.h>
57 #include <media/rc-core.h>
58
59 #define DRVNAME "winbond-cir"
60
61 /* CEIR Wake-Up Registers, relative to data->wbase */
62 #define WBCIR_REG_WCEIR_CTL 0x03 /* CEIR Receiver Control */
63 #define WBCIR_REG_WCEIR_STS 0x04 /* CEIR Receiver Status */
64 #define WBCIR_REG_WCEIR_EV_EN 0x05 /* CEIR Receiver Event Enable */
65 #define WBCIR_REG_WCEIR_CNTL 0x06 /* CEIR Receiver Counter Low */
66 #define WBCIR_REG_WCEIR_CNTH 0x07 /* CEIR Receiver Counter High */
67 #define WBCIR_REG_WCEIR_INDEX 0x08 /* CEIR Receiver Index */
68 #define WBCIR_REG_WCEIR_DATA 0x09 /* CEIR Receiver Data */
69 #define WBCIR_REG_WCEIR_CSL 0x0A /* CEIR Re. Compare Strlen */
70 #define WBCIR_REG_WCEIR_CFG1 0x0B /* CEIR Re. Configuration 1 */
71 #define WBCIR_REG_WCEIR_CFG2 0x0C /* CEIR Re. Configuration 2 */
72
73 /* CEIR Enhanced Functionality Registers, relative to data->ebase */
74 #define WBCIR_REG_ECEIR_CTS 0x00 /* Enhanced IR Control Status */
75 #define WBCIR_REG_ECEIR_CCTL 0x01 /* Infrared Counter Control */
76 #define WBCIR_REG_ECEIR_CNT_LO 0x02 /* Infrared Counter LSB */
77 #define WBCIR_REG_ECEIR_CNT_HI 0x03 /* Infrared Counter MSB */
78 #define WBCIR_REG_ECEIR_IREM 0x04 /* Infrared Emitter Status */
79
80 /* SP3 Banked Registers, relative to data->sbase */
81 #define WBCIR_REG_SP3_BSR 0x03 /* Bank Select, all banks */
82 /* Bank 0 */
83 #define WBCIR_REG_SP3_RXDATA 0x00 /* FIFO RX data (r) */
84 #define WBCIR_REG_SP3_TXDATA 0x00 /* FIFO TX data (w) */
85 #define WBCIR_REG_SP3_IER 0x01 /* Interrupt Enable */
86 #define WBCIR_REG_SP3_EIR 0x02 /* Event Identification (r) */
87 #define WBCIR_REG_SP3_FCR 0x02 /* FIFO Control (w) */
88 #define WBCIR_REG_SP3_MCR 0x04 /* Mode Control */
89 #define WBCIR_REG_SP3_LSR 0x05 /* Link Status */
90 #define WBCIR_REG_SP3_MSR 0x06 /* Modem Status */
91 #define WBCIR_REG_SP3_ASCR 0x07 /* Aux Status and Control */
92 /* Bank 2 */
93 #define WBCIR_REG_SP3_BGDL 0x00 /* Baud Divisor LSB */
94 #define WBCIR_REG_SP3_BGDH 0x01 /* Baud Divisor MSB */
95 #define WBCIR_REG_SP3_EXCR1 0x02 /* Extended Control 1 */
96 #define WBCIR_REG_SP3_EXCR2 0x04 /* Extended Control 2 */
97 #define WBCIR_REG_SP3_TXFLV 0x06 /* TX FIFO Level */
98 #define WBCIR_REG_SP3_RXFLV 0x07 /* RX FIFO Level */
99 /* Bank 3 */
100 #define WBCIR_REG_SP3_MRID 0x00 /* Module Identification */
101 #define WBCIR_REG_SP3_SH_LCR 0x01 /* LCR Shadow */
102 #define WBCIR_REG_SP3_SH_FCR 0x02 /* FCR Shadow */
103 /* Bank 4 */
104 #define WBCIR_REG_SP3_IRCR1 0x02 /* Infrared Control 1 */
105 /* Bank 5 */
106 #define WBCIR_REG_SP3_IRCR2 0x04 /* Infrared Control 2 */
107 /* Bank 6 */
108 #define WBCIR_REG_SP3_IRCR3 0x00 /* Infrared Control 3 */
109 #define WBCIR_REG_SP3_SIR_PW 0x02 /* SIR Pulse Width */
110 /* Bank 7 */
111 #define WBCIR_REG_SP3_IRRXDC 0x00 /* IR RX Demod Control */
112 #define WBCIR_REG_SP3_IRTXMC 0x01 /* IR TX Mod Control */
113 #define WBCIR_REG_SP3_RCCFG 0x02 /* CEIR Config */
114 #define WBCIR_REG_SP3_IRCFG1 0x04 /* Infrared Config 1 */
115 #define WBCIR_REG_SP3_IRCFG4 0x07 /* Infrared Config 4 */
116
117 /*
118 * Magic values follow
119 */
120
121 /* No interrupts for WBCIR_REG_SP3_IER and WBCIR_REG_SP3_EIR */
122 #define WBCIR_IRQ_NONE 0x00
123 /* RX data bit for WBCIR_REG_SP3_IER and WBCIR_REG_SP3_EIR */
124 #define WBCIR_IRQ_RX 0x01
125 /* TX data low bit for WBCIR_REG_SP3_IER and WBCIR_REG_SP3_EIR */
126 #define WBCIR_IRQ_TX_LOW 0x02
127 /* Over/Under-flow bit for WBCIR_REG_SP3_IER and WBCIR_REG_SP3_EIR */
128 #define WBCIR_IRQ_ERR 0x04
129 /* TX data empty bit for WBCEIR_REG_SP3_IER and WBCIR_REG_SP3_EIR */
130 #define WBCIR_IRQ_TX_EMPTY 0x20
131 /* Led enable/disable bit for WBCIR_REG_ECEIR_CTS */
132 #define WBCIR_LED_ENABLE 0x80
133 /* RX data available bit for WBCIR_REG_SP3_LSR */
134 #define WBCIR_RX_AVAIL 0x01
135 /* RX data overrun error bit for WBCIR_REG_SP3_LSR */
136 #define WBCIR_RX_OVERRUN 0x02
137 /* TX End-Of-Transmission bit for WBCIR_REG_SP3_ASCR */
138 #define WBCIR_TX_EOT 0x04
139 /* RX disable bit for WBCIR_REG_SP3_ASCR */
140 #define WBCIR_RX_DISABLE 0x20
141 /* TX data underrun error bit for WBCIR_REG_SP3_ASCR */
142 #define WBCIR_TX_UNDERRUN 0x40
143 /* Extended mode enable bit for WBCIR_REG_SP3_EXCR1 */
144 #define WBCIR_EXT_ENABLE 0x01
145 /* Select compare register in WBCIR_REG_WCEIR_INDEX (bits 5 & 6) */
146 #define WBCIR_REGSEL_COMPARE 0x10
147 /* Select mask register in WBCIR_REG_WCEIR_INDEX (bits 5 & 6) */
148 #define WBCIR_REGSEL_MASK 0x20
149 /* Starting address of selected register in WBCIR_REG_WCEIR_INDEX */
150 #define WBCIR_REG_ADDR0 0x00
151 /* Enable carrier counter */
152 #define WBCIR_CNTR_EN 0x01
153 /* Reset carrier counter */
154 #define WBCIR_CNTR_R 0x02
155 /* Invert TX */
156 #define WBCIR_IRTX_INV 0x04
157 /* Receiver oversampling */
158 #define WBCIR_RX_T_OV 0x40
159
160 /* Valid banks for the SP3 UART */
161 enum wbcir_bank {
162 WBCIR_BANK_0 = 0x00,
163 WBCIR_BANK_1 = 0x80,
164 WBCIR_BANK_2 = 0xE0,
165 WBCIR_BANK_3 = 0xE4,
166 WBCIR_BANK_4 = 0xE8,
167 WBCIR_BANK_5 = 0xEC,
168 WBCIR_BANK_6 = 0xF0,
169 WBCIR_BANK_7 = 0xF4,
170 };
171
172 /* Supported power-on IR Protocols */
173 enum wbcir_protocol {
174 IR_PROTOCOL_RC5 = 0x0,
175 IR_PROTOCOL_NEC = 0x1,
176 IR_PROTOCOL_RC6 = 0x2,
177 };
178
179 /* Possible states for IR reception */
180 enum wbcir_rxstate {
181 WBCIR_RXSTATE_INACTIVE = 0,
182 WBCIR_RXSTATE_ACTIVE,
183 WBCIR_RXSTATE_ERROR
184 };
185
186 /* Possible states for IR transmission */
187 enum wbcir_txstate {
188 WBCIR_TXSTATE_INACTIVE = 0,
189 WBCIR_TXSTATE_ACTIVE,
190 WBCIR_TXSTATE_ERROR
191 };
192
193 /* Misc */
194 #define WBCIR_NAME "Winbond CIR"
195 #define WBCIR_ID_FAMILY 0xF1 /* Family ID for the WPCD376I */
196 #define WBCIR_ID_CHIP 0x04 /* Chip ID for the WPCD376I */
197 #define INVALID_SCANCODE 0x7FFFFFFF /* Invalid with all protos */
198 #define WAKEUP_IOMEM_LEN 0x10 /* Wake-Up I/O Reg Len */
199 #define EHFUNC_IOMEM_LEN 0x10 /* Enhanced Func I/O Reg Len */
200 #define SP_IOMEM_LEN 0x08 /* Serial Port 3 (IR) Reg Len */
201
202 /* Per-device data */
203 struct wbcir_data {
204 spinlock_t spinlock;
205 struct rc_dev *dev;
206 struct led_classdev led;
207
208 unsigned long wbase; /* Wake-Up Baseaddr */
209 unsigned long ebase; /* Enhanced Func. Baseaddr */
210 unsigned long sbase; /* Serial Port Baseaddr */
211 unsigned int irq; /* Serial Port IRQ */
212 u8 irqmask;
213
214 /* RX state */
215 enum wbcir_rxstate rxstate;
216 int carrier_report_enabled;
217 u32 pulse_duration;
218
219 /* TX state */
220 enum wbcir_txstate txstate;
221 u32 txlen;
222 u32 txoff;
223 u32 *txbuf;
224 u8 txmask;
225 u32 txcarrier;
226 };
227
228 static enum wbcir_protocol protocol = IR_PROTOCOL_RC6;
229 module_param(protocol, uint, 0444);
230 MODULE_PARM_DESC(protocol, "IR protocol to use for the power-on command "
231 "(0 = RC5, 1 = NEC, 2 = RC6A, default)");
232
233 static bool invert; /* default = 0 */
234 module_param(invert, bool, 0444);
235 MODULE_PARM_DESC(invert, "Invert the signal from the IR receiver");
236
237 static bool txandrx; /* default = 0 */
238 module_param(txandrx, bool, 0444);
239 MODULE_PARM_DESC(txandrx, "Allow simultaneous TX and RX");
240
241 static unsigned int wake_sc = 0x800F040C;
242 module_param(wake_sc, uint, 0644);
243 MODULE_PARM_DESC(wake_sc, "Scancode of the power-on IR command");
244
245 static unsigned int wake_rc6mode = 6;
246 module_param(wake_rc6mode, uint, 0644);
247 MODULE_PARM_DESC(wake_rc6mode, "RC6 mode for the power-on command "
248 "(0 = 0, 6 = 6A, default)");
249
250
251
252 /*****************************************************************************
253 *
254 * UTILITY FUNCTIONS
255 *
256 *****************************************************************************/
257
258 /* Caller needs to hold wbcir_lock */
259 static void
260 wbcir_set_bits(unsigned long addr, u8 bits, u8 mask)
261 {
262 u8 val;
263
264 val = inb(addr);
265 val = ((val & ~mask) | (bits & mask));
266 outb(val, addr);
267 }
268
269 /* Selects the register bank for the serial port */
270 static inline void
271 wbcir_select_bank(struct wbcir_data *data, enum wbcir_bank bank)
272 {
273 outb(bank, data->sbase + WBCIR_REG_SP3_BSR);
274 }
275
276 static inline void
277 wbcir_set_irqmask(struct wbcir_data *data, u8 irqmask)
278 {
279 if (data->irqmask == irqmask)
280 return;
281
282 wbcir_select_bank(data, WBCIR_BANK_0);
283 outb(irqmask, data->sbase + WBCIR_REG_SP3_IER);
284 data->irqmask = irqmask;
285 }
286
287 static enum led_brightness
288 wbcir_led_brightness_get(struct led_classdev *led_cdev)
289 {
290 struct wbcir_data *data = container_of(led_cdev,
291 struct wbcir_data,
292 led);
293
294 if (inb(data->ebase + WBCIR_REG_ECEIR_CTS) & WBCIR_LED_ENABLE)
295 return LED_FULL;
296 else
297 return LED_OFF;
298 }
299
300 static void
301 wbcir_led_brightness_set(struct led_classdev *led_cdev,
302 enum led_brightness brightness)
303 {
304 struct wbcir_data *data = container_of(led_cdev,
305 struct wbcir_data,
306 led);
307
308 wbcir_set_bits(data->ebase + WBCIR_REG_ECEIR_CTS,
309 brightness == LED_OFF ? 0x00 : WBCIR_LED_ENABLE,
310 WBCIR_LED_ENABLE);
311 }
312
313 /* Manchester encodes bits to RC6 message cells (see wbcir_shutdown) */
314 static u8
315 wbcir_to_rc6cells(u8 val)
316 {
317 u8 coded = 0x00;
318 int i;
319
320 val &= 0x0F;
321 for (i = 0; i < 4; i++) {
322 if (val & 0x01)
323 coded |= 0x02 << (i * 2);
324 else
325 coded |= 0x01 << (i * 2);
326 val >>= 1;
327 }
328
329 return coded;
330 }
331
332 /*****************************************************************************
333 *
334 * INTERRUPT FUNCTIONS
335 *
336 *****************************************************************************/
337
338 static void
339 wbcir_carrier_report(struct wbcir_data *data)
340 {
341 unsigned counter = inb(data->ebase + WBCIR_REG_ECEIR_CNT_LO) |
342 inb(data->ebase + WBCIR_REG_ECEIR_CNT_HI) << 8;
343
344 if (counter > 0 && counter < 0xffff) {
345 DEFINE_IR_RAW_EVENT(ev);
346
347 ev.carrier_report = 1;
348 ev.carrier = DIV_ROUND_CLOSEST(counter * 1000000u,
349 data->pulse_duration);
350
351 ir_raw_event_store(data->dev, &ev);
352 }
353
354 /* reset and restart the counter */
355 data->pulse_duration = 0;
356 wbcir_set_bits(data->ebase + WBCIR_REG_ECEIR_CCTL, WBCIR_CNTR_R,
357 WBCIR_CNTR_EN | WBCIR_CNTR_R);
358 wbcir_set_bits(data->ebase + WBCIR_REG_ECEIR_CCTL, WBCIR_CNTR_EN,
359 WBCIR_CNTR_EN | WBCIR_CNTR_R);
360 }
361
362 static void
363 wbcir_idle_rx(struct rc_dev *dev, bool idle)
364 {
365 struct wbcir_data *data = dev->priv;
366
367 if (!idle && data->rxstate == WBCIR_RXSTATE_INACTIVE)
368 data->rxstate = WBCIR_RXSTATE_ACTIVE;
369
370 if (idle && data->rxstate != WBCIR_RXSTATE_INACTIVE) {
371 data->rxstate = WBCIR_RXSTATE_INACTIVE;
372
373 if (data->carrier_report_enabled)
374 wbcir_carrier_report(data);
375
376 /* Tell hardware to go idle by setting RXINACTIVE */
377 outb(WBCIR_RX_DISABLE, data->sbase + WBCIR_REG_SP3_ASCR);
378 }
379 }
380
381 static void
382 wbcir_irq_rx(struct wbcir_data *data, struct pnp_dev *device)
383 {
384 u8 irdata;
385 DEFINE_IR_RAW_EVENT(rawir);
386 unsigned duration;
387
388 /* Since RXHDLEV is set, at least 8 bytes are in the FIFO */
389 while (inb(data->sbase + WBCIR_REG_SP3_LSR) & WBCIR_RX_AVAIL) {
390 irdata = inb(data->sbase + WBCIR_REG_SP3_RXDATA);
391 if (data->rxstate == WBCIR_RXSTATE_ERROR)
392 continue;
393
394 duration = ((irdata & 0x7F) + 1) *
395 (data->carrier_report_enabled ? 2 : 10);
396 rawir.pulse = irdata & 0x80 ? false : true;
397 rawir.duration = US_TO_NS(duration);
398
399 if (rawir.pulse)
400 data->pulse_duration += duration;
401
402 ir_raw_event_store_with_filter(data->dev, &rawir);
403 }
404
405 ir_raw_event_handle(data->dev);
406 }
407
408 static void
409 wbcir_irq_tx(struct wbcir_data *data)
410 {
411 unsigned int space;
412 unsigned int used;
413 u8 bytes[16];
414 u8 byte;
415
416 if (!data->txbuf)
417 return;
418
419 switch (data->txstate) {
420 case WBCIR_TXSTATE_INACTIVE:
421 /* TX FIFO empty */
422 space = 16;
423 break;
424 case WBCIR_TXSTATE_ACTIVE:
425 /* TX FIFO low (3 bytes or less) */
426 space = 13;
427 break;
428 case WBCIR_TXSTATE_ERROR:
429 space = 0;
430 break;
431 default:
432 return;
433 }
434
435 /*
436 * TX data is run-length coded in bytes: YXXXXXXX
437 * Y = space (1) or pulse (0)
438 * X = duration, encoded as (X + 1) * 10us (i.e 10 to 1280 us)
439 */
440 for (used = 0; used < space && data->txoff != data->txlen; used++) {
441 if (data->txbuf[data->txoff] == 0) {
442 data->txoff++;
443 continue;
444 }
445 byte = min((u32)0x80, data->txbuf[data->txoff]);
446 data->txbuf[data->txoff] -= byte;
447 byte--;
448 byte |= (data->txoff % 2 ? 0x80 : 0x00); /* pulse/space */
449 bytes[used] = byte;
450 }
451
452 while (data->txbuf[data->txoff] == 0 && data->txoff != data->txlen)
453 data->txoff++;
454
455 if (used == 0) {
456 /* Finished */
457 if (data->txstate == WBCIR_TXSTATE_ERROR)
458 /* Clear TX underrun bit */
459 outb(WBCIR_TX_UNDERRUN, data->sbase + WBCIR_REG_SP3_ASCR);
460 wbcir_set_irqmask(data, WBCIR_IRQ_RX | WBCIR_IRQ_ERR);
461 kfree(data->txbuf);
462 data->txbuf = NULL;
463 data->txstate = WBCIR_TXSTATE_INACTIVE;
464 } else if (data->txoff == data->txlen) {
465 /* At the end of transmission, tell the hw before last byte */
466 outsb(data->sbase + WBCIR_REG_SP3_TXDATA, bytes, used - 1);
467 outb(WBCIR_TX_EOT, data->sbase + WBCIR_REG_SP3_ASCR);
468 outb(bytes[used - 1], data->sbase + WBCIR_REG_SP3_TXDATA);
469 wbcir_set_irqmask(data, WBCIR_IRQ_RX | WBCIR_IRQ_ERR |
470 WBCIR_IRQ_TX_EMPTY);
471 } else {
472 /* More data to follow... */
473 outsb(data->sbase + WBCIR_REG_SP3_RXDATA, bytes, used);
474 if (data->txstate == WBCIR_TXSTATE_INACTIVE) {
475 wbcir_set_irqmask(data, WBCIR_IRQ_RX | WBCIR_IRQ_ERR |
476 WBCIR_IRQ_TX_LOW);
477 data->txstate = WBCIR_TXSTATE_ACTIVE;
478 }
479 }
480 }
481
482 static irqreturn_t
483 wbcir_irq_handler(int irqno, void *cookie)
484 {
485 struct pnp_dev *device = cookie;
486 struct wbcir_data *data = pnp_get_drvdata(device);
487 unsigned long flags;
488 u8 status;
489
490 spin_lock_irqsave(&data->spinlock, flags);
491 wbcir_select_bank(data, WBCIR_BANK_0);
492 status = inb(data->sbase + WBCIR_REG_SP3_EIR);
493 status &= data->irqmask;
494
495 if (!status) {
496 spin_unlock_irqrestore(&data->spinlock, flags);
497 return IRQ_NONE;
498 }
499
500 if (status & WBCIR_IRQ_ERR) {
501 /* RX overflow? (read clears bit) */
502 if (inb(data->sbase + WBCIR_REG_SP3_LSR) & WBCIR_RX_OVERRUN) {
503 data->rxstate = WBCIR_RXSTATE_ERROR;
504 ir_raw_event_reset(data->dev);
505 }
506
507 /* TX underflow? */
508 if (inb(data->sbase + WBCIR_REG_SP3_ASCR) & WBCIR_TX_UNDERRUN)
509 data->txstate = WBCIR_TXSTATE_ERROR;
510 }
511
512 if (status & WBCIR_IRQ_RX)
513 wbcir_irq_rx(data, device);
514
515 if (status & (WBCIR_IRQ_TX_LOW | WBCIR_IRQ_TX_EMPTY))
516 wbcir_irq_tx(data);
517
518 spin_unlock_irqrestore(&data->spinlock, flags);
519 return IRQ_HANDLED;
520 }
521
522 /*****************************************************************************
523 *
524 * RC-CORE INTERFACE FUNCTIONS
525 *
526 *****************************************************************************/
527
528 static int
529 wbcir_set_carrier_report(struct rc_dev *dev, int enable)
530 {
531 struct wbcir_data *data = dev->priv;
532 unsigned long flags;
533
534 spin_lock_irqsave(&data->spinlock, flags);
535
536 if (data->carrier_report_enabled == enable) {
537 spin_unlock_irqrestore(&data->spinlock, flags);
538 return 0;
539 }
540
541 data->pulse_duration = 0;
542 wbcir_set_bits(data->ebase + WBCIR_REG_ECEIR_CCTL, WBCIR_CNTR_R,
543 WBCIR_CNTR_EN | WBCIR_CNTR_R);
544
545 if (enable && data->dev->idle)
546 wbcir_set_bits(data->ebase + WBCIR_REG_ECEIR_CCTL,
547 WBCIR_CNTR_EN, WBCIR_CNTR_EN | WBCIR_CNTR_R);
548
549 /* Set a higher sampling resolution if carrier reports are enabled */
550 wbcir_select_bank(data, WBCIR_BANK_2);
551 data->dev->rx_resolution = US_TO_NS(enable ? 2 : 10);
552 outb(enable ? 0x03 : 0x0f, data->sbase + WBCIR_REG_SP3_BGDL);
553 outb(0x00, data->sbase + WBCIR_REG_SP3_BGDH);
554
555 /* Enable oversampling if carrier reports are enabled */
556 wbcir_select_bank(data, WBCIR_BANK_7);
557 wbcir_set_bits(data->sbase + WBCIR_REG_SP3_RCCFG,
558 enable ? WBCIR_RX_T_OV : 0, WBCIR_RX_T_OV);
559
560 data->carrier_report_enabled = enable;
561 spin_unlock_irqrestore(&data->spinlock, flags);
562
563 return 0;
564 }
565
566 static int
567 wbcir_txcarrier(struct rc_dev *dev, u32 carrier)
568 {
569 struct wbcir_data *data = dev->priv;
570 unsigned long flags;
571 u8 val;
572 u32 freq;
573
574 freq = DIV_ROUND_CLOSEST(carrier, 1000);
575 if (freq < 30 || freq > 60)
576 return -EINVAL;
577
578 switch (freq) {
579 case 58:
580 case 59:
581 case 60:
582 val = freq - 58;
583 freq *= 1000;
584 break;
585 case 57:
586 val = freq - 27;
587 freq = 56900;
588 break;
589 default:
590 val = freq - 27;
591 freq *= 1000;
592 break;
593 }
594
595 spin_lock_irqsave(&data->spinlock, flags);
596 if (data->txstate != WBCIR_TXSTATE_INACTIVE) {
597 spin_unlock_irqrestore(&data->spinlock, flags);
598 return -EBUSY;
599 }
600
601 if (data->txcarrier != freq) {
602 wbcir_select_bank(data, WBCIR_BANK_7);
603 wbcir_set_bits(data->sbase + WBCIR_REG_SP3_IRTXMC, val, 0x1F);
604 data->txcarrier = freq;
605 }
606
607 spin_unlock_irqrestore(&data->spinlock, flags);
608 return 0;
609 }
610
611 static int
612 wbcir_txmask(struct rc_dev *dev, u32 mask)
613 {
614 struct wbcir_data *data = dev->priv;
615 unsigned long flags;
616 u8 val;
617
618 /* Four outputs, only one output can be enabled at a time */
619 switch (mask) {
620 case 0x1:
621 val = 0x0;
622 break;
623 case 0x2:
624 val = 0x1;
625 break;
626 case 0x4:
627 val = 0x2;
628 break;
629 case 0x8:
630 val = 0x3;
631 break;
632 default:
633 return -EINVAL;
634 }
635
636 spin_lock_irqsave(&data->spinlock, flags);
637 if (data->txstate != WBCIR_TXSTATE_INACTIVE) {
638 spin_unlock_irqrestore(&data->spinlock, flags);
639 return -EBUSY;
640 }
641
642 if (data->txmask != mask) {
643 wbcir_set_bits(data->ebase + WBCIR_REG_ECEIR_CTS, val, 0x0c);
644 data->txmask = mask;
645 }
646
647 spin_unlock_irqrestore(&data->spinlock, flags);
648 return 0;
649 }
650
651 static int
652 wbcir_tx(struct rc_dev *dev, unsigned *b, unsigned count)
653 {
654 struct wbcir_data *data = dev->priv;
655 unsigned *buf;
656 unsigned i;
657 unsigned long flags;
658
659 buf = kmalloc(count * sizeof(*b), GFP_KERNEL);
660 if (!buf)
661 return -ENOMEM;
662
663 /* Convert values to multiples of 10us */
664 for (i = 0; i < count; i++)
665 buf[i] = DIV_ROUND_CLOSEST(b[i], 10);
666
667 /* Not sure if this is possible, but better safe than sorry */
668 spin_lock_irqsave(&data->spinlock, flags);
669 if (data->txstate != WBCIR_TXSTATE_INACTIVE) {
670 spin_unlock_irqrestore(&data->spinlock, flags);
671 kfree(buf);
672 return -EBUSY;
673 }
674
675 /* Fill the TX fifo once, the irq handler will do the rest */
676 data->txbuf = buf;
677 data->txlen = count;
678 data->txoff = 0;
679 wbcir_irq_tx(data);
680
681 /* We're done */
682 spin_unlock_irqrestore(&data->spinlock, flags);
683 return count;
684 }
685
686 /*****************************************************************************
687 *
688 * SETUP/INIT/SUSPEND/RESUME FUNCTIONS
689 *
690 *****************************************************************************/
691
692 static void
693 wbcir_shutdown(struct pnp_dev *device)
694 {
695 struct device *dev = &device->dev;
696 struct wbcir_data *data = pnp_get_drvdata(device);
697 bool do_wake = true;
698 u8 match[11];
699 u8 mask[11];
700 u8 rc6_csl = 0;
701 int i;
702
703 memset(match, 0, sizeof(match));
704 memset(mask, 0, sizeof(mask));
705
706 if (wake_sc == INVALID_SCANCODE || !device_may_wakeup(dev)) {
707 do_wake = false;
708 goto finish;
709 }
710
711 switch (protocol) {
712 case IR_PROTOCOL_RC5:
713 if (wake_sc > 0xFFF) {
714 do_wake = false;
715 dev_err(dev, "RC5 - Invalid wake scancode\n");
716 break;
717 }
718
719 /* Mask = 13 bits, ex toggle */
720 mask[0] = 0xFF;
721 mask[1] = 0x17;
722
723 match[0] = (wake_sc & 0x003F); /* 6 command bits */
724 match[0] |= (wake_sc & 0x0180) >> 1; /* 2 address bits */
725 match[1] = (wake_sc & 0x0E00) >> 9; /* 3 address bits */
726 if (!(wake_sc & 0x0040)) /* 2nd start bit */
727 match[1] |= 0x10;
728
729 break;
730
731 case IR_PROTOCOL_NEC:
732 if (wake_sc > 0xFFFFFF) {
733 do_wake = false;
734 dev_err(dev, "NEC - Invalid wake scancode\n");
735 break;
736 }
737
738 mask[0] = mask[1] = mask[2] = mask[3] = 0xFF;
739
740 match[1] = bitrev8((wake_sc & 0xFF));
741 match[0] = ~match[1];
742
743 match[3] = bitrev8((wake_sc & 0xFF00) >> 8);
744 if (wake_sc > 0xFFFF)
745 match[2] = bitrev8((wake_sc & 0xFF0000) >> 16);
746 else
747 match[2] = ~match[3];
748
749 break;
750
751 case IR_PROTOCOL_RC6:
752
753 if (wake_rc6mode == 0) {
754 if (wake_sc > 0xFFFF) {
755 do_wake = false;
756 dev_err(dev, "RC6 - Invalid wake scancode\n");
757 break;
758 }
759
760 /* Command */
761 match[0] = wbcir_to_rc6cells(wake_sc >> 0);
762 mask[0] = 0xFF;
763 match[1] = wbcir_to_rc6cells(wake_sc >> 4);
764 mask[1] = 0xFF;
765
766 /* Address */
767 match[2] = wbcir_to_rc6cells(wake_sc >> 8);
768 mask[2] = 0xFF;
769 match[3] = wbcir_to_rc6cells(wake_sc >> 12);
770 mask[3] = 0xFF;
771
772 /* Header */
773 match[4] = 0x50; /* mode1 = mode0 = 0, ignore toggle */
774 mask[4] = 0xF0;
775 match[5] = 0x09; /* start bit = 1, mode2 = 0 */
776 mask[5] = 0x0F;
777
778 rc6_csl = 44;
779
780 } else if (wake_rc6mode == 6) {
781 i = 0;
782
783 /* Command */
784 match[i] = wbcir_to_rc6cells(wake_sc >> 0);
785 mask[i++] = 0xFF;
786 match[i] = wbcir_to_rc6cells(wake_sc >> 4);
787 mask[i++] = 0xFF;
788
789 /* Address + Toggle */
790 match[i] = wbcir_to_rc6cells(wake_sc >> 8);
791 mask[i++] = 0xFF;
792 match[i] = wbcir_to_rc6cells(wake_sc >> 12);
793 mask[i++] = 0x3F;
794
795 /* Customer bits 7 - 0 */
796 match[i] = wbcir_to_rc6cells(wake_sc >> 16);
797 mask[i++] = 0xFF;
798 match[i] = wbcir_to_rc6cells(wake_sc >> 20);
799 mask[i++] = 0xFF;
800
801 if (wake_sc & 0x80000000) {
802 /* Customer range bit and bits 15 - 8 */
803 match[i] = wbcir_to_rc6cells(wake_sc >> 24);
804 mask[i++] = 0xFF;
805 match[i] = wbcir_to_rc6cells(wake_sc >> 28);
806 mask[i++] = 0xFF;
807 rc6_csl = 76;
808 } else if (wake_sc <= 0x007FFFFF) {
809 rc6_csl = 60;
810 } else {
811 do_wake = false;
812 dev_err(dev, "RC6 - Invalid wake scancode\n");
813 break;
814 }
815
816 /* Header */
817 match[i] = 0x93; /* mode1 = mode0 = 1, submode = 0 */
818 mask[i++] = 0xFF;
819 match[i] = 0x0A; /* start bit = 1, mode2 = 1 */
820 mask[i++] = 0x0F;
821
822 } else {
823 do_wake = false;
824 dev_err(dev, "RC6 - Invalid wake mode\n");
825 }
826
827 break;
828
829 default:
830 do_wake = false;
831 break;
832 }
833
834 finish:
835 if (do_wake) {
836 /* Set compare and compare mask */
837 wbcir_set_bits(data->wbase + WBCIR_REG_WCEIR_INDEX,
838 WBCIR_REGSEL_COMPARE | WBCIR_REG_ADDR0,
839 0x3F);
840 outsb(data->wbase + WBCIR_REG_WCEIR_DATA, match, 11);
841 wbcir_set_bits(data->wbase + WBCIR_REG_WCEIR_INDEX,
842 WBCIR_REGSEL_MASK | WBCIR_REG_ADDR0,
843 0x3F);
844 outsb(data->wbase + WBCIR_REG_WCEIR_DATA, mask, 11);
845
846 /* RC6 Compare String Len */
847 outb(rc6_csl, data->wbase + WBCIR_REG_WCEIR_CSL);
848
849 /* Clear status bits NEC_REP, BUFF, MSG_END, MATCH */
850 wbcir_set_bits(data->wbase + WBCIR_REG_WCEIR_STS, 0x17, 0x17);
851
852 /* Clear BUFF_EN, Clear END_EN, Set MATCH_EN */
853 wbcir_set_bits(data->wbase + WBCIR_REG_WCEIR_EV_EN, 0x01, 0x07);
854
855 /* Set CEIR_EN */
856 wbcir_set_bits(data->wbase + WBCIR_REG_WCEIR_CTL, 0x01, 0x01);
857
858 } else {
859 /* Clear BUFF_EN, Clear END_EN, Clear MATCH_EN */
860 wbcir_set_bits(data->wbase + WBCIR_REG_WCEIR_EV_EN, 0x00, 0x07);
861
862 /* Clear CEIR_EN */
863 wbcir_set_bits(data->wbase + WBCIR_REG_WCEIR_CTL, 0x00, 0x01);
864 }
865
866 /*
867 * ACPI will set the HW disable bit for SP3 which means that the
868 * output signals are left in an undefined state which may cause
869 * spurious interrupts which we need to ignore until the hardware
870 * is reinitialized.
871 */
872 wbcir_set_irqmask(data, WBCIR_IRQ_NONE);
873 disable_irq(data->irq);
874 }
875
876 static int
877 wbcir_suspend(struct pnp_dev *device, pm_message_t state)
878 {
879 struct wbcir_data *data = pnp_get_drvdata(device);
880 led_classdev_suspend(&data->led);
881 wbcir_shutdown(device);
882 return 0;
883 }
884
885 static void
886 wbcir_init_hw(struct wbcir_data *data)
887 {
888 u8 tmp;
889
890 /* Disable interrupts */
891 wbcir_set_irqmask(data, WBCIR_IRQ_NONE);
892
893 /* Set PROT_SEL, RX_INV, Clear CEIR_EN (needed for the led) */
894 tmp = protocol << 4;
895 if (invert)
896 tmp |= 0x08;
897 outb(tmp, data->wbase + WBCIR_REG_WCEIR_CTL);
898
899 /* Clear status bits NEC_REP, BUFF, MSG_END, MATCH */
900 wbcir_set_bits(data->wbase + WBCIR_REG_WCEIR_STS, 0x17, 0x17);
901
902 /* Clear BUFF_EN, Clear END_EN, Clear MATCH_EN */
903 wbcir_set_bits(data->wbase + WBCIR_REG_WCEIR_EV_EN, 0x00, 0x07);
904
905 /* Set RC5 cell time to correspond to 36 kHz */
906 wbcir_set_bits(data->wbase + WBCIR_REG_WCEIR_CFG1, 0x4A, 0x7F);
907
908 /* Set IRTX_INV */
909 if (invert)
910 outb(WBCIR_IRTX_INV, data->ebase + WBCIR_REG_ECEIR_CCTL);
911 else
912 outb(0x00, data->ebase + WBCIR_REG_ECEIR_CCTL);
913
914 /*
915 * Clear IR LED, set SP3 clock to 24Mhz, set TX mask to IRTX1,
916 * set SP3_IRRX_SW to binary 01, helpfully not documented
917 */
918 outb(0x10, data->ebase + WBCIR_REG_ECEIR_CTS);
919 data->txmask = 0x1;
920
921 /* Enable extended mode */
922 wbcir_select_bank(data, WBCIR_BANK_2);
923 outb(WBCIR_EXT_ENABLE, data->sbase + WBCIR_REG_SP3_EXCR1);
924
925 /*
926 * Configure baud generator, IR data will be sampled at
927 * a bitrate of: (24Mhz * prescaler) / (divisor * 16).
928 *
929 * The ECIR registers include a flag to change the
930 * 24Mhz clock freq to 48Mhz.
931 *
932 * It's not documented in the specs, but fifo levels
933 * other than 16 seems to be unsupported.
934 */
935
936 /* prescaler 1.0, tx/rx fifo lvl 16 */
937 outb(0x30, data->sbase + WBCIR_REG_SP3_EXCR2);
938
939 /* Set baud divisor to sample every 10 us */
940 outb(0x0f, data->sbase + WBCIR_REG_SP3_BGDL);
941 outb(0x00, data->sbase + WBCIR_REG_SP3_BGDH);
942
943 /* Set CEIR mode */
944 wbcir_select_bank(data, WBCIR_BANK_0);
945 outb(0xC0, data->sbase + WBCIR_REG_SP3_MCR);
946 inb(data->sbase + WBCIR_REG_SP3_LSR); /* Clear LSR */
947 inb(data->sbase + WBCIR_REG_SP3_MSR); /* Clear MSR */
948
949 /* Disable RX demod, enable run-length enc/dec, set freq span */
950 wbcir_select_bank(data, WBCIR_BANK_7);
951 outb(0x90, data->sbase + WBCIR_REG_SP3_RCCFG);
952
953 /* Disable timer */
954 wbcir_select_bank(data, WBCIR_BANK_4);
955 outb(0x00, data->sbase + WBCIR_REG_SP3_IRCR1);
956
957 /* Disable MSR interrupt, clear AUX_IRX, mask RX during TX? */
958 wbcir_select_bank(data, WBCIR_BANK_5);
959 outb(txandrx ? 0x03 : 0x02, data->sbase + WBCIR_REG_SP3_IRCR2);
960
961 /* Disable CRC */
962 wbcir_select_bank(data, WBCIR_BANK_6);
963 outb(0x20, data->sbase + WBCIR_REG_SP3_IRCR3);
964
965 /* Set RX demodulation freq, not really used */
966 wbcir_select_bank(data, WBCIR_BANK_7);
967 outb(0xF2, data->sbase + WBCIR_REG_SP3_IRRXDC);
968
969 /* Set TX modulation, 36kHz, 7us pulse width */
970 outb(0x69, data->sbase + WBCIR_REG_SP3_IRTXMC);
971 data->txcarrier = 36000;
972
973 /* Set invert and pin direction */
974 if (invert)
975 outb(0x10, data->sbase + WBCIR_REG_SP3_IRCFG4);
976 else
977 outb(0x00, data->sbase + WBCIR_REG_SP3_IRCFG4);
978
979 /* Set FIFO thresholds (RX = 8, TX = 3), reset RX/TX */
980 wbcir_select_bank(data, WBCIR_BANK_0);
981 outb(0x97, data->sbase + WBCIR_REG_SP3_FCR);
982
983 /* Clear AUX status bits */
984 outb(0xE0, data->sbase + WBCIR_REG_SP3_ASCR);
985
986 /* Clear RX state */
987 data->rxstate = WBCIR_RXSTATE_INACTIVE;
988 ir_raw_event_reset(data->dev);
989 ir_raw_event_set_idle(data->dev, true);
990
991 /* Clear TX state */
992 if (data->txstate == WBCIR_TXSTATE_ACTIVE) {
993 kfree(data->txbuf);
994 data->txbuf = NULL;
995 data->txstate = WBCIR_TXSTATE_INACTIVE;
996 }
997
998 /* Enable interrupts */
999 wbcir_set_irqmask(data, WBCIR_IRQ_RX | WBCIR_IRQ_ERR);
1000 }
1001
1002 static int
1003 wbcir_resume(struct pnp_dev *device)
1004 {
1005 struct wbcir_data *data = pnp_get_drvdata(device);
1006
1007 wbcir_init_hw(data);
1008 enable_irq(data->irq);
1009 led_classdev_resume(&data->led);
1010
1011 return 0;
1012 }
1013
1014 static int
1015 wbcir_probe(struct pnp_dev *device, const struct pnp_device_id *dev_id)
1016 {
1017 struct device *dev = &device->dev;
1018 struct wbcir_data *data;
1019 int err;
1020
1021 if (!(pnp_port_len(device, 0) == EHFUNC_IOMEM_LEN &&
1022 pnp_port_len(device, 1) == WAKEUP_IOMEM_LEN &&
1023 pnp_port_len(device, 2) == SP_IOMEM_LEN)) {
1024 dev_err(dev, "Invalid resources\n");
1025 return -ENODEV;
1026 }
1027
1028 data = kzalloc(sizeof(*data), GFP_KERNEL);
1029 if (!data) {
1030 err = -ENOMEM;
1031 goto exit;
1032 }
1033
1034 pnp_set_drvdata(device, data);
1035
1036 spin_lock_init(&data->spinlock);
1037 data->ebase = pnp_port_start(device, 0);
1038 data->wbase = pnp_port_start(device, 1);
1039 data->sbase = pnp_port_start(device, 2);
1040 data->irq = pnp_irq(device, 0);
1041
1042 if (data->wbase == 0 || data->ebase == 0 ||
1043 data->sbase == 0 || data->irq == 0) {
1044 err = -ENODEV;
1045 dev_err(dev, "Invalid resources\n");
1046 goto exit_free_data;
1047 }
1048
1049 dev_dbg(&device->dev, "Found device "
1050 "(w: 0x%lX, e: 0x%lX, s: 0x%lX, i: %u)\n",
1051 data->wbase, data->ebase, data->sbase, data->irq);
1052
1053 data->led.name = "cir::activity";
1054 data->led.default_trigger = "rc-feedback";
1055 data->led.brightness_set = wbcir_led_brightness_set;
1056 data->led.brightness_get = wbcir_led_brightness_get;
1057 err = led_classdev_register(&device->dev, &data->led);
1058 if (err)
1059 goto exit_free_data;
1060
1061 data->dev = rc_allocate_device();
1062 if (!data->dev) {
1063 err = -ENOMEM;
1064 goto exit_unregister_led;
1065 }
1066
1067 data->dev->driver_type = RC_DRIVER_IR_RAW;
1068 data->dev->driver_name = DRVNAME;
1069 data->dev->input_name = WBCIR_NAME;
1070 data->dev->input_phys = "wbcir/cir0";
1071 data->dev->input_id.bustype = BUS_HOST;
1072 data->dev->input_id.vendor = PCI_VENDOR_ID_WINBOND;
1073 data->dev->input_id.product = WBCIR_ID_FAMILY;
1074 data->dev->input_id.version = WBCIR_ID_CHIP;
1075 data->dev->map_name = RC_MAP_RC6_MCE;
1076 data->dev->s_idle = wbcir_idle_rx;
1077 data->dev->s_carrier_report = wbcir_set_carrier_report;
1078 data->dev->s_tx_mask = wbcir_txmask;
1079 data->dev->s_tx_carrier = wbcir_txcarrier;
1080 data->dev->tx_ir = wbcir_tx;
1081 data->dev->priv = data;
1082 data->dev->dev.parent = &device->dev;
1083 data->dev->timeout = MS_TO_NS(100);
1084 data->dev->rx_resolution = US_TO_NS(2);
1085 data->dev->allowed_protocols = RC_BIT_ALL;
1086
1087 err = rc_register_device(data->dev);
1088 if (err)
1089 goto exit_free_rc;
1090
1091 if (!request_region(data->wbase, WAKEUP_IOMEM_LEN, DRVNAME)) {
1092 dev_err(dev, "Region 0x%lx-0x%lx already in use!\n",
1093 data->wbase, data->wbase + WAKEUP_IOMEM_LEN - 1);
1094 err = -EBUSY;
1095 goto exit_unregister_device;
1096 }
1097
1098 if (!request_region(data->ebase, EHFUNC_IOMEM_LEN, DRVNAME)) {
1099 dev_err(dev, "Region 0x%lx-0x%lx already in use!\n",
1100 data->ebase, data->ebase + EHFUNC_IOMEM_LEN - 1);
1101 err = -EBUSY;
1102 goto exit_release_wbase;
1103 }
1104
1105 if (!request_region(data->sbase, SP_IOMEM_LEN, DRVNAME)) {
1106 dev_err(dev, "Region 0x%lx-0x%lx already in use!\n",
1107 data->sbase, data->sbase + SP_IOMEM_LEN - 1);
1108 err = -EBUSY;
1109 goto exit_release_ebase;
1110 }
1111
1112 err = request_irq(data->irq, wbcir_irq_handler,
1113 0, DRVNAME, device);
1114 if (err) {
1115 dev_err(dev, "Failed to claim IRQ %u\n", data->irq);
1116 err = -EBUSY;
1117 goto exit_release_sbase;
1118 }
1119
1120 device_init_wakeup(&device->dev, 1);
1121
1122 wbcir_init_hw(data);
1123
1124 return 0;
1125
1126 exit_release_sbase:
1127 release_region(data->sbase, SP_IOMEM_LEN);
1128 exit_release_ebase:
1129 release_region(data->ebase, EHFUNC_IOMEM_LEN);
1130 exit_release_wbase:
1131 release_region(data->wbase, WAKEUP_IOMEM_LEN);
1132 exit_unregister_device:
1133 rc_unregister_device(data->dev);
1134 data->dev = NULL;
1135 exit_free_rc:
1136 rc_free_device(data->dev);
1137 exit_unregister_led:
1138 led_classdev_unregister(&data->led);
1139 exit_free_data:
1140 kfree(data);
1141 pnp_set_drvdata(device, NULL);
1142 exit:
1143 return err;
1144 }
1145
1146 static void
1147 wbcir_remove(struct pnp_dev *device)
1148 {
1149 struct wbcir_data *data = pnp_get_drvdata(device);
1150
1151 /* Disable interrupts */
1152 wbcir_set_irqmask(data, WBCIR_IRQ_NONE);
1153 free_irq(data->irq, device);
1154
1155 /* Clear status bits NEC_REP, BUFF, MSG_END, MATCH */
1156 wbcir_set_bits(data->wbase + WBCIR_REG_WCEIR_STS, 0x17, 0x17);
1157
1158 /* Clear CEIR_EN */
1159 wbcir_set_bits(data->wbase + WBCIR_REG_WCEIR_CTL, 0x00, 0x01);
1160
1161 /* Clear BUFF_EN, END_EN, MATCH_EN */
1162 wbcir_set_bits(data->wbase + WBCIR_REG_WCEIR_EV_EN, 0x00, 0x07);
1163
1164 rc_unregister_device(data->dev);
1165
1166 led_classdev_unregister(&data->led);
1167
1168 /* This is ok since &data->led isn't actually used */
1169 wbcir_led_brightness_set(&data->led, LED_OFF);
1170
1171 release_region(data->wbase, WAKEUP_IOMEM_LEN);
1172 release_region(data->ebase, EHFUNC_IOMEM_LEN);
1173 release_region(data->sbase, SP_IOMEM_LEN);
1174
1175 kfree(data);
1176
1177 pnp_set_drvdata(device, NULL);
1178 }
1179
1180 static const struct pnp_device_id wbcir_ids[] = {
1181 { "WEC1022", 0 },
1182 { "", 0 }
1183 };
1184 MODULE_DEVICE_TABLE(pnp, wbcir_ids);
1185
1186 static struct pnp_driver wbcir_driver = {
1187 .name = WBCIR_NAME,
1188 .id_table = wbcir_ids,
1189 .probe = wbcir_probe,
1190 .remove = wbcir_remove,
1191 .suspend = wbcir_suspend,
1192 .resume = wbcir_resume,
1193 .shutdown = wbcir_shutdown
1194 };
1195
1196 static int __init
1197 wbcir_init(void)
1198 {
1199 int ret;
1200
1201 switch (protocol) {
1202 case IR_PROTOCOL_RC5:
1203 case IR_PROTOCOL_NEC:
1204 case IR_PROTOCOL_RC6:
1205 break;
1206 default:
1207 pr_err("Invalid power-on protocol\n");
1208 }
1209
1210 ret = pnp_register_driver(&wbcir_driver);
1211 if (ret)
1212 pr_err("Unable to register driver\n");
1213
1214 return ret;
1215 }
1216
1217 static void __exit
1218 wbcir_exit(void)
1219 {
1220 pnp_unregister_driver(&wbcir_driver);
1221 }
1222
1223 module_init(wbcir_init);
1224 module_exit(wbcir_exit);
1225
1226 MODULE_AUTHOR("David Härdeman <david@hardeman.nu>");
1227 MODULE_DESCRIPTION("Winbond SuperI/O Consumer IR Driver");
1228 MODULE_LICENSE("GPL");
Linux kernel - Deliverables
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