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Merge tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/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 /* return the number of transmitters */
619 if (mask > 15)
620 return 4;
621
622 /* Four outputs, only one output can be enabled at a time */
623 switch (mask) {
624 case 0x1:
625 val = 0x0;
626 break;
627 case 0x2:
628 val = 0x1;
629 break;
630 case 0x4:
631 val = 0x2;
632 break;
633 case 0x8:
634 val = 0x3;
635 break;
636 default:
637 return -EINVAL;
638 }
639
640 spin_lock_irqsave(&data->spinlock, flags);
641 if (data->txstate != WBCIR_TXSTATE_INACTIVE) {
642 spin_unlock_irqrestore(&data->spinlock, flags);
643 return -EBUSY;
644 }
645
646 if (data->txmask != mask) {
647 wbcir_set_bits(data->ebase + WBCIR_REG_ECEIR_CTS, val, 0x0c);
648 data->txmask = mask;
649 }
650
651 spin_unlock_irqrestore(&data->spinlock, flags);
652 return 0;
653 }
654
655 static int
656 wbcir_tx(struct rc_dev *dev, unsigned *b, unsigned count)
657 {
658 struct wbcir_data *data = dev->priv;
659 unsigned *buf;
660 unsigned i;
661 unsigned long flags;
662
663 buf = kmalloc(count * sizeof(*b), GFP_KERNEL);
664 if (!buf)
665 return -ENOMEM;
666
667 /* Convert values to multiples of 10us */
668 for (i = 0; i < count; i++)
669 buf[i] = DIV_ROUND_CLOSEST(b[i], 10);
670
671 /* Not sure if this is possible, but better safe than sorry */
672 spin_lock_irqsave(&data->spinlock, flags);
673 if (data->txstate != WBCIR_TXSTATE_INACTIVE) {
674 spin_unlock_irqrestore(&data->spinlock, flags);
675 kfree(buf);
676 return -EBUSY;
677 }
678
679 /* Fill the TX fifo once, the irq handler will do the rest */
680 data->txbuf = buf;
681 data->txlen = count;
682 data->txoff = 0;
683 wbcir_irq_tx(data);
684
685 /* We're done */
686 spin_unlock_irqrestore(&data->spinlock, flags);
687 return count;
688 }
689
690 /*****************************************************************************
691 *
692 * SETUP/INIT/SUSPEND/RESUME FUNCTIONS
693 *
694 *****************************************************************************/
695
696 static void
697 wbcir_shutdown(struct pnp_dev *device)
698 {
699 struct device *dev = &device->dev;
700 struct wbcir_data *data = pnp_get_drvdata(device);
701 bool do_wake = true;
702 u8 match[11];
703 u8 mask[11];
704 u8 rc6_csl = 0;
705 int i;
706
707 memset(match, 0, sizeof(match));
708 memset(mask, 0, sizeof(mask));
709
710 if (wake_sc == INVALID_SCANCODE || !device_may_wakeup(dev)) {
711 do_wake = false;
712 goto finish;
713 }
714
715 switch (protocol) {
716 case IR_PROTOCOL_RC5:
717 if (wake_sc > 0xFFF) {
718 do_wake = false;
719 dev_err(dev, "RC5 - Invalid wake scancode\n");
720 break;
721 }
722
723 /* Mask = 13 bits, ex toggle */
724 mask[0] = 0xFF;
725 mask[1] = 0x17;
726
727 match[0] = (wake_sc & 0x003F); /* 6 command bits */
728 match[0] |= (wake_sc & 0x0180) >> 1; /* 2 address bits */
729 match[1] = (wake_sc & 0x0E00) >> 9; /* 3 address bits */
730 if (!(wake_sc & 0x0040)) /* 2nd start bit */
731 match[1] |= 0x10;
732
733 break;
734
735 case IR_PROTOCOL_NEC:
736 if (wake_sc > 0xFFFFFF) {
737 do_wake = false;
738 dev_err(dev, "NEC - Invalid wake scancode\n");
739 break;
740 }
741
742 mask[0] = mask[1] = mask[2] = mask[3] = 0xFF;
743
744 match[1] = bitrev8((wake_sc & 0xFF));
745 match[0] = ~match[1];
746
747 match[3] = bitrev8((wake_sc & 0xFF00) >> 8);
748 if (wake_sc > 0xFFFF)
749 match[2] = bitrev8((wake_sc & 0xFF0000) >> 16);
750 else
751 match[2] = ~match[3];
752
753 break;
754
755 case IR_PROTOCOL_RC6:
756
757 if (wake_rc6mode == 0) {
758 if (wake_sc > 0xFFFF) {
759 do_wake = false;
760 dev_err(dev, "RC6 - Invalid wake scancode\n");
761 break;
762 }
763
764 /* Command */
765 match[0] = wbcir_to_rc6cells(wake_sc >> 0);
766 mask[0] = 0xFF;
767 match[1] = wbcir_to_rc6cells(wake_sc >> 4);
768 mask[1] = 0xFF;
769
770 /* Address */
771 match[2] = wbcir_to_rc6cells(wake_sc >> 8);
772 mask[2] = 0xFF;
773 match[3] = wbcir_to_rc6cells(wake_sc >> 12);
774 mask[3] = 0xFF;
775
776 /* Header */
777 match[4] = 0x50; /* mode1 = mode0 = 0, ignore toggle */
778 mask[4] = 0xF0;
779 match[5] = 0x09; /* start bit = 1, mode2 = 0 */
780 mask[5] = 0x0F;
781
782 rc6_csl = 44;
783
784 } else if (wake_rc6mode == 6) {
785 i = 0;
786
787 /* Command */
788 match[i] = wbcir_to_rc6cells(wake_sc >> 0);
789 mask[i++] = 0xFF;
790 match[i] = wbcir_to_rc6cells(wake_sc >> 4);
791 mask[i++] = 0xFF;
792
793 /* Address + Toggle */
794 match[i] = wbcir_to_rc6cells(wake_sc >> 8);
795 mask[i++] = 0xFF;
796 match[i] = wbcir_to_rc6cells(wake_sc >> 12);
797 mask[i++] = 0x3F;
798
799 /* Customer bits 7 - 0 */
800 match[i] = wbcir_to_rc6cells(wake_sc >> 16);
801 mask[i++] = 0xFF;
802 match[i] = wbcir_to_rc6cells(wake_sc >> 20);
803 mask[i++] = 0xFF;
804
805 if (wake_sc & 0x80000000) {
806 /* Customer range bit and bits 15 - 8 */
807 match[i] = wbcir_to_rc6cells(wake_sc >> 24);
808 mask[i++] = 0xFF;
809 match[i] = wbcir_to_rc6cells(wake_sc >> 28);
810 mask[i++] = 0xFF;
811 rc6_csl = 76;
812 } else if (wake_sc <= 0x007FFFFF) {
813 rc6_csl = 60;
814 } else {
815 do_wake = false;
816 dev_err(dev, "RC6 - Invalid wake scancode\n");
817 break;
818 }
819
820 /* Header */
821 match[i] = 0x93; /* mode1 = mode0 = 1, submode = 0 */
822 mask[i++] = 0xFF;
823 match[i] = 0x0A; /* start bit = 1, mode2 = 1 */
824 mask[i++] = 0x0F;
825
826 } else {
827 do_wake = false;
828 dev_err(dev, "RC6 - Invalid wake mode\n");
829 }
830
831 break;
832
833 default:
834 do_wake = false;
835 break;
836 }
837
838 finish:
839 if (do_wake) {
840 /* Set compare and compare mask */
841 wbcir_set_bits(data->wbase + WBCIR_REG_WCEIR_INDEX,
842 WBCIR_REGSEL_COMPARE | WBCIR_REG_ADDR0,
843 0x3F);
844 outsb(data->wbase + WBCIR_REG_WCEIR_DATA, match, 11);
845 wbcir_set_bits(data->wbase + WBCIR_REG_WCEIR_INDEX,
846 WBCIR_REGSEL_MASK | WBCIR_REG_ADDR0,
847 0x3F);
848 outsb(data->wbase + WBCIR_REG_WCEIR_DATA, mask, 11);
849
850 /* RC6 Compare String Len */
851 outb(rc6_csl, data->wbase + WBCIR_REG_WCEIR_CSL);
852
853 /* Clear status bits NEC_REP, BUFF, MSG_END, MATCH */
854 wbcir_set_bits(data->wbase + WBCIR_REG_WCEIR_STS, 0x17, 0x17);
855
856 /* Clear BUFF_EN, Clear END_EN, Set MATCH_EN */
857 wbcir_set_bits(data->wbase + WBCIR_REG_WCEIR_EV_EN, 0x01, 0x07);
858
859 /* Set CEIR_EN */
860 wbcir_set_bits(data->wbase + WBCIR_REG_WCEIR_CTL, 0x01, 0x01);
861
862 } else {
863 /* Clear BUFF_EN, Clear END_EN, Clear MATCH_EN */
864 wbcir_set_bits(data->wbase + WBCIR_REG_WCEIR_EV_EN, 0x00, 0x07);
865
866 /* Clear CEIR_EN */
867 wbcir_set_bits(data->wbase + WBCIR_REG_WCEIR_CTL, 0x00, 0x01);
868 }
869
870 /*
871 * ACPI will set the HW disable bit for SP3 which means that the
872 * output signals are left in an undefined state which may cause
873 * spurious interrupts which we need to ignore until the hardware
874 * is reinitialized.
875 */
876 wbcir_set_irqmask(data, WBCIR_IRQ_NONE);
877 disable_irq(data->irq);
878 }
879
880 static int
881 wbcir_suspend(struct pnp_dev *device, pm_message_t state)
882 {
883 struct wbcir_data *data = pnp_get_drvdata(device);
884 led_classdev_suspend(&data->led);
885 wbcir_shutdown(device);
886 return 0;
887 }
888
889 static void
890 wbcir_init_hw(struct wbcir_data *data)
891 {
892 u8 tmp;
893
894 /* Disable interrupts */
895 wbcir_set_irqmask(data, WBCIR_IRQ_NONE);
896
897 /* Set PROT_SEL, RX_INV, Clear CEIR_EN (needed for the led) */
898 tmp = protocol << 4;
899 if (invert)
900 tmp |= 0x08;
901 outb(tmp, data->wbase + WBCIR_REG_WCEIR_CTL);
902
903 /* Clear status bits NEC_REP, BUFF, MSG_END, MATCH */
904 wbcir_set_bits(data->wbase + WBCIR_REG_WCEIR_STS, 0x17, 0x17);
905
906 /* Clear BUFF_EN, Clear END_EN, Clear MATCH_EN */
907 wbcir_set_bits(data->wbase + WBCIR_REG_WCEIR_EV_EN, 0x00, 0x07);
908
909 /* Set RC5 cell time to correspond to 36 kHz */
910 wbcir_set_bits(data->wbase + WBCIR_REG_WCEIR_CFG1, 0x4A, 0x7F);
911
912 /* Set IRTX_INV */
913 if (invert)
914 outb(WBCIR_IRTX_INV, data->ebase + WBCIR_REG_ECEIR_CCTL);
915 else
916 outb(0x00, data->ebase + WBCIR_REG_ECEIR_CCTL);
917
918 /*
919 * Clear IR LED, set SP3 clock to 24Mhz, set TX mask to IRTX1,
920 * set SP3_IRRX_SW to binary 01, helpfully not documented
921 */
922 outb(0x10, data->ebase + WBCIR_REG_ECEIR_CTS);
923 data->txmask = 0x1;
924
925 /* Enable extended mode */
926 wbcir_select_bank(data, WBCIR_BANK_2);
927 outb(WBCIR_EXT_ENABLE, data->sbase + WBCIR_REG_SP3_EXCR1);
928
929 /*
930 * Configure baud generator, IR data will be sampled at
931 * a bitrate of: (24Mhz * prescaler) / (divisor * 16).
932 *
933 * The ECIR registers include a flag to change the
934 * 24Mhz clock freq to 48Mhz.
935 *
936 * It's not documented in the specs, but fifo levels
937 * other than 16 seems to be unsupported.
938 */
939
940 /* prescaler 1.0, tx/rx fifo lvl 16 */
941 outb(0x30, data->sbase + WBCIR_REG_SP3_EXCR2);
942
943 /* Set baud divisor to sample every 10 us */
944 outb(0x0f, data->sbase + WBCIR_REG_SP3_BGDL);
945 outb(0x00, data->sbase + WBCIR_REG_SP3_BGDH);
946
947 /* Set CEIR mode */
948 wbcir_select_bank(data, WBCIR_BANK_0);
949 outb(0xC0, data->sbase + WBCIR_REG_SP3_MCR);
950 inb(data->sbase + WBCIR_REG_SP3_LSR); /* Clear LSR */
951 inb(data->sbase + WBCIR_REG_SP3_MSR); /* Clear MSR */
952
953 /* Disable RX demod, enable run-length enc/dec, set freq span */
954 wbcir_select_bank(data, WBCIR_BANK_7);
955 outb(0x90, data->sbase + WBCIR_REG_SP3_RCCFG);
956
957 /* Disable timer */
958 wbcir_select_bank(data, WBCIR_BANK_4);
959 outb(0x00, data->sbase + WBCIR_REG_SP3_IRCR1);
960
961 /* Disable MSR interrupt, clear AUX_IRX, mask RX during TX? */
962 wbcir_select_bank(data, WBCIR_BANK_5);
963 outb(txandrx ? 0x03 : 0x02, data->sbase + WBCIR_REG_SP3_IRCR2);
964
965 /* Disable CRC */
966 wbcir_select_bank(data, WBCIR_BANK_6);
967 outb(0x20, data->sbase + WBCIR_REG_SP3_IRCR3);
968
969 /* Set RX demodulation freq, not really used */
970 wbcir_select_bank(data, WBCIR_BANK_7);
971 outb(0xF2, data->sbase + WBCIR_REG_SP3_IRRXDC);
972
973 /* Set TX modulation, 36kHz, 7us pulse width */
974 outb(0x69, data->sbase + WBCIR_REG_SP3_IRTXMC);
975 data->txcarrier = 36000;
976
977 /* Set invert and pin direction */
978 if (invert)
979 outb(0x10, data->sbase + WBCIR_REG_SP3_IRCFG4);
980 else
981 outb(0x00, data->sbase + WBCIR_REG_SP3_IRCFG4);
982
983 /* Set FIFO thresholds (RX = 8, TX = 3), reset RX/TX */
984 wbcir_select_bank(data, WBCIR_BANK_0);
985 outb(0x97, data->sbase + WBCIR_REG_SP3_FCR);
986
987 /* Clear AUX status bits */
988 outb(0xE0, data->sbase + WBCIR_REG_SP3_ASCR);
989
990 /* Clear RX state */
991 data->rxstate = WBCIR_RXSTATE_INACTIVE;
992 ir_raw_event_reset(data->dev);
993 ir_raw_event_set_idle(data->dev, true);
994
995 /* Clear TX state */
996 if (data->txstate == WBCIR_TXSTATE_ACTIVE) {
997 kfree(data->txbuf);
998 data->txbuf = NULL;
999 data->txstate = WBCIR_TXSTATE_INACTIVE;
1000 }
1001
1002 /* Enable interrupts */
1003 wbcir_set_irqmask(data, WBCIR_IRQ_RX | WBCIR_IRQ_ERR);
1004 }
1005
1006 static int
1007 wbcir_resume(struct pnp_dev *device)
1008 {
1009 struct wbcir_data *data = pnp_get_drvdata(device);
1010
1011 wbcir_init_hw(data);
1012 enable_irq(data->irq);
1013 led_classdev_resume(&data->led);
1014
1015 return 0;
1016 }
1017
1018 static int
1019 wbcir_probe(struct pnp_dev *device, const struct pnp_device_id *dev_id)
1020 {
1021 struct device *dev = &device->dev;
1022 struct wbcir_data *data;
1023 int err;
1024
1025 if (!(pnp_port_len(device, 0) == EHFUNC_IOMEM_LEN &&
1026 pnp_port_len(device, 1) == WAKEUP_IOMEM_LEN &&
1027 pnp_port_len(device, 2) == SP_IOMEM_LEN)) {
1028 dev_err(dev, "Invalid resources\n");
1029 return -ENODEV;
1030 }
1031
1032 data = kzalloc(sizeof(*data), GFP_KERNEL);
1033 if (!data) {
1034 err = -ENOMEM;
1035 goto exit;
1036 }
1037
1038 pnp_set_drvdata(device, data);
1039
1040 spin_lock_init(&data->spinlock);
1041 data->ebase = pnp_port_start(device, 0);
1042 data->wbase = pnp_port_start(device, 1);
1043 data->sbase = pnp_port_start(device, 2);
1044 data->irq = pnp_irq(device, 0);
1045
1046 if (data->wbase == 0 || data->ebase == 0 ||
1047 data->sbase == 0 || data->irq == 0) {
1048 err = -ENODEV;
1049 dev_err(dev, "Invalid resources\n");
1050 goto exit_free_data;
1051 }
1052
1053 dev_dbg(&device->dev, "Found device "
1054 "(w: 0x%lX, e: 0x%lX, s: 0x%lX, i: %u)\n",
1055 data->wbase, data->ebase, data->sbase, data->irq);
1056
1057 data->led.name = "cir::activity";
1058 data->led.default_trigger = "rc-feedback";
1059 data->led.brightness_set = wbcir_led_brightness_set;
1060 data->led.brightness_get = wbcir_led_brightness_get;
1061 err = led_classdev_register(&device->dev, &data->led);
1062 if (err)
1063 goto exit_free_data;
1064
1065 data->dev = rc_allocate_device();
1066 if (!data->dev) {
1067 err = -ENOMEM;
1068 goto exit_unregister_led;
1069 }
1070
1071 data->dev->driver_type = RC_DRIVER_IR_RAW;
1072 data->dev->driver_name = DRVNAME;
1073 data->dev->input_name = WBCIR_NAME;
1074 data->dev->input_phys = "wbcir/cir0";
1075 data->dev->input_id.bustype = BUS_HOST;
1076 data->dev->input_id.vendor = PCI_VENDOR_ID_WINBOND;
1077 data->dev->input_id.product = WBCIR_ID_FAMILY;
1078 data->dev->input_id.version = WBCIR_ID_CHIP;
1079 data->dev->map_name = RC_MAP_RC6_MCE;
1080 data->dev->s_idle = wbcir_idle_rx;
1081 data->dev->s_carrier_report = wbcir_set_carrier_report;
1082 data->dev->s_tx_mask = wbcir_txmask;
1083 data->dev->s_tx_carrier = wbcir_txcarrier;
1084 data->dev->tx_ir = wbcir_tx;
1085 data->dev->priv = data;
1086 data->dev->dev.parent = &device->dev;
1087 data->dev->timeout = MS_TO_NS(100);
1088 data->dev->rx_resolution = US_TO_NS(2);
1089 data->dev->allowed_protocols = RC_BIT_ALL;
1090
1091 err = rc_register_device(data->dev);
1092 if (err)
1093 goto exit_free_rc;
1094
1095 if (!request_region(data->wbase, WAKEUP_IOMEM_LEN, DRVNAME)) {
1096 dev_err(dev, "Region 0x%lx-0x%lx already in use!\n",
1097 data->wbase, data->wbase + WAKEUP_IOMEM_LEN - 1);
1098 err = -EBUSY;
1099 goto exit_unregister_device;
1100 }
1101
1102 if (!request_region(data->ebase, EHFUNC_IOMEM_LEN, DRVNAME)) {
1103 dev_err(dev, "Region 0x%lx-0x%lx already in use!\n",
1104 data->ebase, data->ebase + EHFUNC_IOMEM_LEN - 1);
1105 err = -EBUSY;
1106 goto exit_release_wbase;
1107 }
1108
1109 if (!request_region(data->sbase, SP_IOMEM_LEN, DRVNAME)) {
1110 dev_err(dev, "Region 0x%lx-0x%lx already in use!\n",
1111 data->sbase, data->sbase + SP_IOMEM_LEN - 1);
1112 err = -EBUSY;
1113 goto exit_release_ebase;
1114 }
1115
1116 err = request_irq(data->irq, wbcir_irq_handler,
1117 0, DRVNAME, device);
1118 if (err) {
1119 dev_err(dev, "Failed to claim IRQ %u\n", data->irq);
1120 err = -EBUSY;
1121 goto exit_release_sbase;
1122 }
1123
1124 device_init_wakeup(&device->dev, 1);
1125
1126 wbcir_init_hw(data);
1127
1128 return 0;
1129
1130 exit_release_sbase:
1131 release_region(data->sbase, SP_IOMEM_LEN);
1132 exit_release_ebase:
1133 release_region(data->ebase, EHFUNC_IOMEM_LEN);
1134 exit_release_wbase:
1135 release_region(data->wbase, WAKEUP_IOMEM_LEN);
1136 exit_unregister_device:
1137 rc_unregister_device(data->dev);
1138 data->dev = NULL;
1139 exit_free_rc:
1140 rc_free_device(data->dev);
1141 exit_unregister_led:
1142 led_classdev_unregister(&data->led);
1143 exit_free_data:
1144 kfree(data);
1145 pnp_set_drvdata(device, NULL);
1146 exit:
1147 return err;
1148 }
1149
1150 static void
1151 wbcir_remove(struct pnp_dev *device)
1152 {
1153 struct wbcir_data *data = pnp_get_drvdata(device);
1154
1155 /* Disable interrupts */
1156 wbcir_set_irqmask(data, WBCIR_IRQ_NONE);
1157 free_irq(data->irq, device);
1158
1159 /* Clear status bits NEC_REP, BUFF, MSG_END, MATCH */
1160 wbcir_set_bits(data->wbase + WBCIR_REG_WCEIR_STS, 0x17, 0x17);
1161
1162 /* Clear CEIR_EN */
1163 wbcir_set_bits(data->wbase + WBCIR_REG_WCEIR_CTL, 0x00, 0x01);
1164
1165 /* Clear BUFF_EN, END_EN, MATCH_EN */
1166 wbcir_set_bits(data->wbase + WBCIR_REG_WCEIR_EV_EN, 0x00, 0x07);
1167
1168 rc_unregister_device(data->dev);
1169
1170 led_classdev_unregister(&data->led);
1171
1172 /* This is ok since &data->led isn't actually used */
1173 wbcir_led_brightness_set(&data->led, LED_OFF);
1174
1175 release_region(data->wbase, WAKEUP_IOMEM_LEN);
1176 release_region(data->ebase, EHFUNC_IOMEM_LEN);
1177 release_region(data->sbase, SP_IOMEM_LEN);
1178
1179 kfree(data);
1180
1181 pnp_set_drvdata(device, NULL);
1182 }
1183
1184 static const struct pnp_device_id wbcir_ids[] = {
1185 { "WEC1022", 0 },
1186 { "", 0 }
1187 };
1188 MODULE_DEVICE_TABLE(pnp, wbcir_ids);
1189
1190 static struct pnp_driver wbcir_driver = {
1191 .name = WBCIR_NAME,
1192 .id_table = wbcir_ids,
1193 .probe = wbcir_probe,
1194 .remove = wbcir_remove,
1195 .suspend = wbcir_suspend,
1196 .resume = wbcir_resume,
1197 .shutdown = wbcir_shutdown
1198 };
1199
1200 static int __init
1201 wbcir_init(void)
1202 {
1203 int ret;
1204
1205 switch (protocol) {
1206 case IR_PROTOCOL_RC5:
1207 case IR_PROTOCOL_NEC:
1208 case IR_PROTOCOL_RC6:
1209 break;
1210 default:
1211 pr_err("Invalid power-on protocol\n");
1212 }
1213
1214 ret = pnp_register_driver(&wbcir_driver);
1215 if (ret)
1216 pr_err("Unable to register driver\n");
1217
1218 return ret;
1219 }
1220
1221 static void __exit
1222 wbcir_exit(void)
1223 {
1224 pnp_unregister_driver(&wbcir_driver);
1225 }
1226
1227 module_init(wbcir_init);
1228 module_exit(wbcir_exit);
1229
1230 MODULE_AUTHOR("David Härdeman <david@hardeman.nu>");
1231 MODULE_DESCRIPTION("Winbond SuperI/O Consumer IR Driver");
1232 MODULE_LICENSE("GPL");
Linux kernel - Deliverables
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