1 // SPDX-License-Identifier: GPL-2.0
2 /*
3 * Driver for Amlogic Meson IR remote receiver
4 *
5 * Copyright (C) 2014 Beniamino Galvani <b.galvani@gmail.com>
6 */
7
8 #include <linux/device.h>
9 #include <linux/err.h>
10 #include <linux/interrupt.h>
11 #include <linux/io.h>
12 #include <linux/module.h>
13 #include <linux/of.h>
14 #include <linux/platform_device.h>
15 #include <linux/spinlock.h>
16 #include <linux/bitfield.h>
17 #include <linux/regmap.h>
18
19 #include <media/rc-core.h>
20
21 #define DRIVER_NAME "meson-ir"
22
23 #define IR_DEC_LDR_ACTIVE 0x00
24 #define IR_DEC_LDR_ACTIVE_MAX GENMASK(28, 16)
25 #define IR_DEC_LDR_ACTIVE_MIN GENMASK(12, 0)
26 #define IR_DEC_LDR_IDLE 0x04
27 #define IR_DEC_LDR_IDLE_MAX GENMASK(28, 16)
28 #define IR_DEC_LDR_IDLE_MIN GENMASK(12, 0)
29 #define IR_DEC_LDR_REPEAT 0x08
30 #define IR_DEC_LDR_REPEAT_MAX GENMASK(25, 16)
31 #define IR_DEC_LDR_REPEAT_MIN GENMASK(9, 0)
32 #define IR_DEC_BIT_0 0x0c
33 #define IR_DEC_BIT_0_MAX GENMASK(25, 16)
34 #define IR_DEC_BIT_0_MIN GENMASK(9, 0)
35 #define IR_DEC_REG0 0x10
36 #define IR_DEC_REG0_FILTER GENMASK(30, 28)
37 #define IR_DEC_REG0_FRAME_TIME_MAX GENMASK(24, 12)
38 #define IR_DEC_REG0_BASE_TIME GENMASK(11, 0)
39 #define IR_DEC_FRAME 0x14
40 #define IR_DEC_STATUS 0x18
41 #define IR_DEC_STATUS_BIT_1_ENABLE BIT(30)
42 #define IR_DEC_STATUS_BIT_1_MAX GENMASK(29, 20)
43 #define IR_DEC_STATUS_BIT_1_MIN GENMASK(19, 10)
44 #define IR_DEC_STATUS_PULSE BIT(8)
45 #define IR_DEC_STATUS_BUSY BIT(7)
46 #define IR_DEC_STATUS_FRAME_STATUS GENMASK(3, 0)
47 #define IR_DEC_REG1 0x1c
48 #define IR_DEC_REG1_TIME_IV GENMASK(28, 16)
49 #define IR_DEC_REG1_FRAME_LEN GENMASK(13, 8)
50 #define IR_DEC_REG1_ENABLE BIT(15)
51 #define IR_DEC_REG1_HOLD_CODE BIT(6)
52 #define IR_DEC_REG1_IRQSEL GENMASK(3, 2)
53 #define IR_DEC_REG1_RESET BIT(0)
54 /* Meson 6b uses REG1 to configure IR mode */
55 #define IR_DEC_REG1_MODE GENMASK(8, 7)
56
57 /* The following registers are only available on Meson 8b and newer */
58 #define IR_DEC_REG2 0x20
59 #define IR_DEC_REG2_TICK_MODE BIT(15)
60 #define IR_DEC_REG2_REPEAT_COUNTER BIT(13)
61 #define IR_DEC_REG2_REPEAT_TIME BIT(12)
62 #define IR_DEC_REG2_COMPARE_FRAME BIT(11)
63 #define IR_DEC_REG2_BIT_ORDER BIT(8)
64 /* Meson 8b / GXBB use REG2 to configure IR mode */
65 #define IR_DEC_REG2_MODE GENMASK(3, 0)
66 #define IR_DEC_DURATN2 0x24
67 #define IR_DEC_DURATN2_MAX GENMASK(25, 16)
68 #define IR_DEC_DURATN2_MIN GENMASK(9, 0)
69 #define IR_DEC_DURATN3 0x28
70 #define IR_DEC_DURATN3_MAX GENMASK(25, 16)
71 #define IR_DEC_DURATN3_MIN GENMASK(9, 0)
72 #define IR_DEC_FRAME1 0x2c
73
74 #define FRAME_MSB_FIRST true
75 #define FRAME_LSB_FIRST false
76
77 #define DEC_MODE_NEC 0x0
78 #define DEC_MODE_RAW 0x2
79 #define DEC_MODE_RC6 0x9
80 #define DEC_MODE_XMP 0xE
81 #define DEC_MODE_UNKNOW 0xFF
82
83 #define DEC_STATUS_VALID BIT(3)
84 #define DEC_STATUS_DATA_CODE_ERR BIT(2)
85 #define DEC_STATUS_CUSTOM_CODE_ERR BIT(1)
86 #define DEC_STATUS_REPEAT BIT(0)
87
88 #define IRQSEL_DEC_MODE 0
89 #define IRQSEL_RISE_FALL 1
90 #define IRQSEL_FALL 2
91 #define IRQSEL_RISE 3
92
93 #define MESON_RAW_TRATE 10 /* us */
94 #define MESON_HW_TRATE 20 /* us */
95
96 /**
97 * struct meson_ir_protocol - describe IR Protocol parameter
98 *
99 * @hw_protocol: select IR Protocol from IR Controller
100 * @repeat_counter_enable: enable frame-to-frame time counter, it should work
101 * with @repeat_compare_enable to detect the repeat frame
102 * @repeat_check_enable: enable repeat time check for repeat detection
103 * @repeat_compare_enable: enable to compare frame for repeat frame detection.
104 * Some IR Protocol send the same data as repeat frame.
105 * In this case, it should work with
106 * @repeat_counter_enable to detect the repeat frame.
107 * @bit_order: bit order, LSB or MSB
108 * @bit1_match_enable: enable to check bit 1
109 * @hold_code_enable: hold frame code in register IR_DEC_FRAME1, the new one
110 * frame code will not be store in IR_DEC_FRAME1.
111 * until IR_DEC_FRAME1 has been read
112 * @count_tick_mode: increasing time unit of frame-to-frame time counter.
113 * 0 = 100us, 1 = 10us
114 * @code_length: length (N-1) of data frame
115 * @frame_time_max: max time for whole frame. Unit: MESON_HW_TRATE
116 * @leader_active_max: max time for NEC/RC6 leader active part. Unit: MESON_HW_TRATE
117 * @leader_active_min: min time for NEC/RC6 leader active part. Unit: MESON_HW_TRATE
118 * @leader_idle_max: max time for NEC/RC6 leader idle part. Unit: MESON_HW_TRATE
119 * @leader_idle_min: min time for NEC/RC6 leader idle part. Unit: MESON_HW_TRATE
120 * @repeat_leader_max: max time for NEC repeat leader idle part. Unit: MESON_HW_TRATE
121 * @repeat_leader_min: min time for NEC repeat leader idle part. Unit: MESON_HW_TRATE
122 * @bit0_max: max time for NEC Logic '0', half of RC6 trailer bit, XMP Logic '00'
123 * @bit0_min: min time for NEC Logic '0', half of RC6 trailer bit, XMP Logic '00'
124 * @bit1_max: max time for NEC Logic '1', whole of RC6 trailer bit, XMP Logic '01'
125 * @bit1_min: min time for NEC Logic '1', whole of RC6 trailer bit, XMP Logic '01'
126 * @duration2_max: max time for half of RC6 normal bit, XMP Logic '10'
127 * @duration2_min: min time for half of RC6 normal bit, XMP Logic '10'
128 * @duration3_max: max time for whole of RC6 normal bit, XMP Logic '11'
129 * @duration3_min: min time for whole of RC6 normal bit, XMP Logic '11'
130 */
131
132 struct meson_ir_protocol {
133 u8 hw_protocol;
134 bool repeat_counter_enable;
135 bool repeat_check_enable;
136 bool repeat_compare_enable;
137 bool bit_order;
138 bool bit1_match_enable;
139 bool hold_code_enable;
140 bool count_tick_mode;
141 u8 code_length;
142 u16 frame_time_max;
143 u16 leader_active_max;
144 u16 leader_active_min;
145 u16 leader_idle_max;
146 u16 leader_idle_min;
147 u16 repeat_leader_max;
148 u16 repeat_leader_min;
149 u16 bit0_max;
150 u16 bit0_min;
151 u16 bit1_max;
152 u16 bit1_min;
153 u16 duration2_max;
154 u16 duration2_min;
155 u16 duration3_max;
156 u16 duration3_min;
157 };
158
159 struct meson_ir_param {
160 bool support_hw_decoder;
161 unsigned int max_register;
162 };
163
164 struct meson_ir {
165 const struct meson_ir_param *param;
166 struct regmap *reg;
167 struct rc_dev *rc;
168 spinlock_t lock;
169 };
170
171 static struct regmap_config meson_ir_regmap_config = {
172 .reg_bits = 32,
173 .val_bits = 32,
174 .reg_stride = 4,
175 };
176
177 static const struct meson_ir_protocol protocol_timings[] = {
178 /* protocol, repeat counter, repeat check, repeat compare, order */
179 {DEC_MODE_NEC, false, false, false, FRAME_LSB_FIRST,
180 /* bit 1 match, hold code, count tick, len, frame time */
181 true, false, false, 32, 4000,
182 /* leader active max/min, leader idle max/min, repeat leader max/min */
183 500, 400, 300, 200, 150, 80,
184 /* bit0 max/min, bit1 max/min, duration2 max/min, duration3 max/min */
185 72, 40, 134, 90, 0, 0, 0, 0}
186 };
187
meson_ir_nec_handler(struct meson_ir * ir)188 static void meson_ir_nec_handler(struct meson_ir *ir)
189 {
190 u32 code = 0;
191 u32 status = 0;
192 enum rc_proto proto;
193
194 regmap_read(ir->reg, IR_DEC_STATUS, &status);
195
196 if (status & DEC_STATUS_REPEAT) {
197 rc_repeat(ir->rc);
198 } else {
199 regmap_read(ir->reg, IR_DEC_FRAME, &code);
200
201 code = ir_nec_bytes_to_scancode(code, code >> 8,
202 code >> 16, code >> 24, &proto);
203 rc_keydown(ir->rc, proto, code, 0);
204 }
205 }
206
meson_ir_hw_handler(struct meson_ir * ir)207 static void meson_ir_hw_handler(struct meson_ir *ir)
208 {
209 if (ir->rc->enabled_protocols & RC_PROTO_BIT_NEC)
210 meson_ir_nec_handler(ir);
211 }
212
meson_ir_irq(int irqno,void * dev_id)213 static irqreturn_t meson_ir_irq(int irqno, void *dev_id)
214 {
215 struct meson_ir *ir = dev_id;
216 u32 duration, status;
217 struct ir_raw_event rawir = {};
218
219 spin_lock(&ir->lock);
220
221 regmap_read(ir->reg, IR_DEC_STATUS, &status);
222
223 if (ir->rc->driver_type == RC_DRIVER_IR_RAW) {
224 rawir.pulse = !!(status & IR_DEC_STATUS_PULSE);
225
226 regmap_read(ir->reg, IR_DEC_REG1, &duration);
227 duration = FIELD_GET(IR_DEC_REG1_TIME_IV, duration);
228 rawir.duration = duration * MESON_RAW_TRATE;
229
230 ir_raw_event_store_with_timeout(ir->rc, &rawir);
231 } else if (ir->rc->driver_type == RC_DRIVER_SCANCODE) {
232 if (status & DEC_STATUS_VALID)
233 meson_ir_hw_handler(ir);
234 }
235
236 spin_unlock(&ir->lock);
237
238 return IRQ_HANDLED;
239 }
240
meson_ir_hw_decoder_init(struct rc_dev * dev,u64 * rc_type)241 static int meson_ir_hw_decoder_init(struct rc_dev *dev, u64 *rc_type)
242 {
243 u8 protocol;
244 u32 regval;
245 int i;
246 unsigned long flags;
247 const struct meson_ir_protocol *timings;
248 struct meson_ir *ir = dev->priv;
249
250 if (*rc_type & RC_PROTO_BIT_NEC)
251 protocol = DEC_MODE_NEC;
252 else
253 return 0;
254
255 for (i = 0; i < ARRAY_SIZE(protocol_timings); i++)
256 if (protocol_timings[i].hw_protocol == protocol)
257 break;
258
259 if (i == ARRAY_SIZE(protocol_timings)) {
260 dev_err(&dev->dev, "hw protocol isn't supported: %d\n",
261 protocol);
262 return -EINVAL;
263 }
264 timings = &protocol_timings[i];
265
266 spin_lock_irqsave(&ir->lock, flags);
267
268 /* Clear controller status */
269 regmap_read(ir->reg, IR_DEC_STATUS, ®val);
270 regmap_read(ir->reg, IR_DEC_FRAME, ®val);
271
272 /* Reset ir decoder and disable decoder */
273 regmap_update_bits(ir->reg, IR_DEC_REG1, IR_DEC_REG1_ENABLE, 0);
274 regmap_update_bits(ir->reg, IR_DEC_REG1, IR_DEC_REG1_RESET,
275 IR_DEC_REG1_RESET);
276
277 /* Base time resolution, (19+1)*1us=20us */
278 regval = FIELD_PREP(IR_DEC_REG0_BASE_TIME, MESON_HW_TRATE - 1);
279 regmap_update_bits(ir->reg, IR_DEC_REG0, IR_DEC_REG0_BASE_TIME, regval);
280
281 /* Monitor timing for input filter */
282 regmap_update_bits(ir->reg, IR_DEC_REG0, IR_DEC_REG0_FILTER,
283 FIELD_PREP(IR_DEC_REG0_FILTER, 7));
284
285 /* HW protocol */
286 regval = FIELD_PREP(IR_DEC_REG2_MODE, timings->hw_protocol);
287 regmap_update_bits(ir->reg, IR_DEC_REG2, IR_DEC_REG2_MODE, regval);
288
289 /* Hold frame data until register was read */
290 regmap_update_bits(ir->reg, IR_DEC_REG1, IR_DEC_REG1_HOLD_CODE,
291 timings->hold_code_enable ?
292 IR_DEC_REG1_HOLD_CODE : 0);
293
294 /* Bit order */
295 regmap_update_bits(ir->reg, IR_DEC_REG2, IR_DEC_REG2_BIT_ORDER,
296 timings->bit_order ? IR_DEC_REG2_BIT_ORDER : 0);
297
298 /* Select tick mode */
299 regmap_update_bits(ir->reg, IR_DEC_REG2, IR_DEC_REG2_TICK_MODE,
300 timings->count_tick_mode ?
301 IR_DEC_REG2_TICK_MODE : 0);
302
303 /*
304 * Some protocols transmit the same data frame as repeat frame
305 * when the key is pressing. In this case, it could be detected as
306 * repeat frame if the repeat checker was enabled.
307 */
308 regmap_update_bits(ir->reg, IR_DEC_REG2, IR_DEC_REG2_REPEAT_COUNTER,
309 timings->repeat_counter_enable ?
310 IR_DEC_REG2_REPEAT_COUNTER : 0);
311 regmap_update_bits(ir->reg, IR_DEC_REG2, IR_DEC_REG2_REPEAT_TIME,
312 timings->repeat_check_enable ?
313 IR_DEC_REG2_REPEAT_TIME : 0);
314 regmap_update_bits(ir->reg, IR_DEC_REG2, IR_DEC_REG2_COMPARE_FRAME,
315 timings->repeat_compare_enable ?
316 IR_DEC_REG2_COMPARE_FRAME : 0);
317
318 /*
319 * FRAME_TIME_MAX should be larger than the time between
320 * data frame and repeat frame
321 */
322 regval = FIELD_PREP(IR_DEC_REG0_FRAME_TIME_MAX,
323 timings->frame_time_max);
324 regmap_update_bits(ir->reg, IR_DEC_REG0, IR_DEC_REG0_FRAME_TIME_MAX,
325 regval);
326
327 /* Length(N-1) of data frame */
328 regval = FIELD_PREP(IR_DEC_REG1_FRAME_LEN, timings->code_length - 1);
329 regmap_update_bits(ir->reg, IR_DEC_REG1, IR_DEC_REG1_FRAME_LEN, regval);
330
331 /* Time for leader active part */
332 regval = FIELD_PREP(IR_DEC_LDR_ACTIVE_MAX,
333 timings->leader_active_max) |
334 FIELD_PREP(IR_DEC_LDR_ACTIVE_MIN,
335 timings->leader_active_min);
336 regmap_update_bits(ir->reg, IR_DEC_LDR_ACTIVE, IR_DEC_LDR_ACTIVE_MAX |
337 IR_DEC_LDR_ACTIVE_MIN, regval);
338
339 /* Time for leader idle part */
340 regval = FIELD_PREP(IR_DEC_LDR_IDLE_MAX, timings->leader_idle_max) |
341 FIELD_PREP(IR_DEC_LDR_IDLE_MIN, timings->leader_idle_min);
342 regmap_update_bits(ir->reg, IR_DEC_LDR_IDLE,
343 IR_DEC_LDR_IDLE_MAX | IR_DEC_LDR_IDLE_MIN, regval);
344
345 /* Time for repeat leader idle part */
346 regval = FIELD_PREP(IR_DEC_LDR_REPEAT_MAX, timings->repeat_leader_max) |
347 FIELD_PREP(IR_DEC_LDR_REPEAT_MIN, timings->repeat_leader_min);
348 regmap_update_bits(ir->reg, IR_DEC_LDR_REPEAT, IR_DEC_LDR_REPEAT_MAX |
349 IR_DEC_LDR_REPEAT_MIN, regval);
350
351 /*
352 * NEC: Time for logic '0'
353 * RC6: Time for half of trailer bit
354 */
355 regval = FIELD_PREP(IR_DEC_BIT_0_MAX, timings->bit0_max) |
356 FIELD_PREP(IR_DEC_BIT_0_MIN, timings->bit0_min);
357 regmap_update_bits(ir->reg, IR_DEC_BIT_0,
358 IR_DEC_BIT_0_MAX | IR_DEC_BIT_0_MIN, regval);
359
360 /*
361 * NEC: Time for logic '1'
362 * RC6: Time for whole of trailer bit
363 */
364 regval = FIELD_PREP(IR_DEC_STATUS_BIT_1_MAX, timings->bit1_max) |
365 FIELD_PREP(IR_DEC_STATUS_BIT_1_MIN, timings->bit1_min);
366 regmap_update_bits(ir->reg, IR_DEC_STATUS, IR_DEC_STATUS_BIT_1_MAX |
367 IR_DEC_STATUS_BIT_1_MIN, regval);
368
369 /* Enable to match logic '1' */
370 regmap_update_bits(ir->reg, IR_DEC_STATUS, IR_DEC_STATUS_BIT_1_ENABLE,
371 timings->bit1_match_enable ?
372 IR_DEC_STATUS_BIT_1_ENABLE : 0);
373
374 /*
375 * NEC: Unused
376 * RC6: Time for halt of logic 0/1
377 */
378 regval = FIELD_PREP(IR_DEC_DURATN2_MAX, timings->duration2_max) |
379 FIELD_PREP(IR_DEC_DURATN2_MIN, timings->duration2_min);
380 regmap_update_bits(ir->reg, IR_DEC_DURATN2,
381 IR_DEC_DURATN2_MAX | IR_DEC_DURATN2_MIN, regval);
382
383 /*
384 * NEC: Unused
385 * RC6: Time for whole logic 0/1
386 */
387 regval = FIELD_PREP(IR_DEC_DURATN3_MAX, timings->duration3_max) |
388 FIELD_PREP(IR_DEC_DURATN3_MIN, timings->duration3_min);
389 regmap_update_bits(ir->reg, IR_DEC_DURATN3,
390 IR_DEC_DURATN3_MAX | IR_DEC_DURATN3_MIN, regval);
391
392 /* Reset ir decoder and enable decode */
393 regmap_update_bits(ir->reg, IR_DEC_REG1, IR_DEC_REG1_RESET,
394 IR_DEC_REG1_RESET);
395 regmap_update_bits(ir->reg, IR_DEC_REG1, IR_DEC_REG1_RESET, 0);
396 regmap_update_bits(ir->reg, IR_DEC_REG1, IR_DEC_REG1_ENABLE,
397 IR_DEC_REG1_ENABLE);
398
399 spin_unlock_irqrestore(&ir->lock, flags);
400
401 dev_info(&dev->dev, "hw decoder init, protocol: %d\n", protocol);
402
403 return 0;
404 }
405
meson_ir_sw_decoder_init(struct rc_dev * dev)406 static void meson_ir_sw_decoder_init(struct rc_dev *dev)
407 {
408 unsigned long flags;
409 struct meson_ir *ir = dev->priv;
410
411 spin_lock_irqsave(&ir->lock, flags);
412
413 /* Reset the decoder */
414 regmap_update_bits(ir->reg, IR_DEC_REG1, IR_DEC_REG1_RESET,
415 IR_DEC_REG1_RESET);
416 regmap_update_bits(ir->reg, IR_DEC_REG1, IR_DEC_REG1_RESET, 0);
417
418 /* Set general operation mode (= raw/software decoding) */
419 if (of_device_is_compatible(dev->dev.of_node, "amlogic,meson6-ir"))
420 regmap_update_bits(ir->reg, IR_DEC_REG1, IR_DEC_REG1_MODE,
421 FIELD_PREP(IR_DEC_REG1_MODE,
422 DEC_MODE_RAW));
423 else
424 regmap_update_bits(ir->reg, IR_DEC_REG2, IR_DEC_REG2_MODE,
425 FIELD_PREP(IR_DEC_REG2_MODE,
426 DEC_MODE_RAW));
427
428 /* Set rate */
429 regmap_update_bits(ir->reg, IR_DEC_REG0, IR_DEC_REG0_BASE_TIME,
430 FIELD_PREP(IR_DEC_REG0_BASE_TIME,
431 MESON_RAW_TRATE - 1));
432 /* IRQ on rising and falling edges */
433 regmap_update_bits(ir->reg, IR_DEC_REG1, IR_DEC_REG1_IRQSEL,
434 FIELD_PREP(IR_DEC_REG1_IRQSEL, IRQSEL_RISE_FALL));
435 /* Enable the decoder */
436 regmap_update_bits(ir->reg, IR_DEC_REG1, IR_DEC_REG1_ENABLE,
437 IR_DEC_REG1_ENABLE);
438
439 spin_unlock_irqrestore(&ir->lock, flags);
440
441 dev_info(&dev->dev, "sw decoder init\n");
442 }
443
meson_ir_probe(struct platform_device * pdev)444 static int meson_ir_probe(struct platform_device *pdev)
445 {
446 const struct meson_ir_param *match_data;
447 struct device *dev = &pdev->dev;
448 struct device_node *node = dev->of_node;
449 void __iomem *res_start;
450 const char *map_name;
451 struct meson_ir *ir;
452 int irq, ret;
453
454 ir = devm_kzalloc(dev, sizeof(struct meson_ir), GFP_KERNEL);
455 if (!ir)
456 return -ENOMEM;
457
458 match_data = of_device_get_match_data(dev);
459 if (!match_data)
460 return dev_err_probe(dev, -ENODEV, "failed to get match data\n");
461
462 ir->param = match_data;
463
464 res_start = devm_platform_ioremap_resource(pdev, 0);
465 if (IS_ERR(res_start))
466 return PTR_ERR(res_start);
467
468 meson_ir_regmap_config.max_register = ir->param->max_register;
469 ir->reg = devm_regmap_init_mmio(&pdev->dev, res_start,
470 &meson_ir_regmap_config);
471 if (IS_ERR(ir->reg))
472 return PTR_ERR(ir->reg);
473
474 irq = platform_get_irq(pdev, 0);
475 if (irq < 0)
476 return irq;
477
478 if (ir->param->support_hw_decoder)
479 ir->rc = devm_rc_allocate_device(&pdev->dev,
480 RC_DRIVER_SCANCODE);
481 else
482 ir->rc = devm_rc_allocate_device(&pdev->dev, RC_DRIVER_IR_RAW);
483
484 if (!ir->rc) {
485 dev_err(dev, "failed to allocate rc device\n");
486 return -ENOMEM;
487 }
488
489 if (ir->rc->driver_type == RC_DRIVER_IR_RAW) {
490 ir->rc->allowed_protocols = RC_PROTO_BIT_ALL_IR_DECODER;
491 ir->rc->rx_resolution = MESON_RAW_TRATE;
492 ir->rc->min_timeout = 1;
493 ir->rc->timeout = IR_DEFAULT_TIMEOUT;
494 ir->rc->max_timeout = 10 * IR_DEFAULT_TIMEOUT;
495 } else if (ir->rc->driver_type == RC_DRIVER_SCANCODE) {
496 ir->rc->allowed_protocols = RC_PROTO_BIT_NEC;
497 ir->rc->change_protocol = meson_ir_hw_decoder_init;
498 }
499
500 ir->rc->priv = ir;
501 ir->rc->device_name = DRIVER_NAME;
502 ir->rc->input_phys = DRIVER_NAME "/input0";
503 ir->rc->input_id.bustype = BUS_HOST;
504 map_name = of_get_property(node, "linux,rc-map-name", NULL);
505 ir->rc->map_name = map_name ? map_name : RC_MAP_EMPTY;
506 ir->rc->driver_name = DRIVER_NAME;
507
508 spin_lock_init(&ir->lock);
509 platform_set_drvdata(pdev, ir);
510
511 ret = devm_rc_register_device(dev, ir->rc);
512 if (ret) {
513 dev_err(dev, "failed to register rc device\n");
514 return ret;
515 }
516
517 if (ir->rc->driver_type == RC_DRIVER_IR_RAW)
518 meson_ir_sw_decoder_init(ir->rc);
519
520 ret = devm_request_irq(dev, irq, meson_ir_irq, 0, "meson_ir", ir);
521 if (ret) {
522 dev_err(dev, "failed to request irq\n");
523 return ret;
524 }
525
526 dev_info(dev, "receiver initialized\n");
527
528 return 0;
529 }
530
meson_ir_remove(struct platform_device * pdev)531 static void meson_ir_remove(struct platform_device *pdev)
532 {
533 struct meson_ir *ir = platform_get_drvdata(pdev);
534 unsigned long flags;
535
536 /* Disable the decoder */
537 spin_lock_irqsave(&ir->lock, flags);
538 regmap_update_bits(ir->reg, IR_DEC_REG1, IR_DEC_REG1_ENABLE, 0);
539 spin_unlock_irqrestore(&ir->lock, flags);
540 }
541
meson_ir_shutdown(struct platform_device * pdev)542 static void meson_ir_shutdown(struct platform_device *pdev)
543 {
544 struct device *dev = &pdev->dev;
545 struct device_node *node = dev->of_node;
546 struct meson_ir *ir = platform_get_drvdata(pdev);
547 unsigned long flags;
548
549 spin_lock_irqsave(&ir->lock, flags);
550
551 /*
552 * Set operation mode to NEC/hardware decoding to give
553 * bootloader a chance to power the system back on
554 */
555 if (of_device_is_compatible(node, "amlogic,meson6-ir"))
556 regmap_update_bits(ir->reg, IR_DEC_REG1, IR_DEC_REG1_MODE,
557 FIELD_PREP(IR_DEC_REG1_MODE, DEC_MODE_NEC));
558 else
559 regmap_update_bits(ir->reg, IR_DEC_REG2, IR_DEC_REG2_MODE,
560 FIELD_PREP(IR_DEC_REG2_MODE, DEC_MODE_NEC));
561
562 /* Set rate to default value */
563 regmap_update_bits(ir->reg, IR_DEC_REG0, IR_DEC_REG0_BASE_TIME,
564 FIELD_PREP(IR_DEC_REG0_BASE_TIME,
565 MESON_HW_TRATE - 1));
566
567 spin_unlock_irqrestore(&ir->lock, flags);
568 }
569
meson_ir_resume(struct device * dev)570 static __maybe_unused int meson_ir_resume(struct device *dev)
571 {
572 struct meson_ir *ir = dev_get_drvdata(dev);
573
574 if (ir->param->support_hw_decoder)
575 meson_ir_hw_decoder_init(ir->rc, &ir->rc->enabled_protocols);
576 else
577 meson_ir_sw_decoder_init(ir->rc);
578
579 return 0;
580 }
581
meson_ir_suspend(struct device * dev)582 static __maybe_unused int meson_ir_suspend(struct device *dev)
583 {
584 struct meson_ir *ir = dev_get_drvdata(dev);
585 unsigned long flags;
586
587 spin_lock_irqsave(&ir->lock, flags);
588 regmap_update_bits(ir->reg, IR_DEC_REG1, IR_DEC_REG1_ENABLE, 0);
589 spin_unlock_irqrestore(&ir->lock, flags);
590
591 return 0;
592 }
593
594 static SIMPLE_DEV_PM_OPS(meson_ir_pm_ops, meson_ir_suspend, meson_ir_resume);
595
596 static const struct meson_ir_param meson6_ir_param = {
597 .support_hw_decoder = false,
598 .max_register = IR_DEC_REG1,
599 };
600
601 static const struct meson_ir_param meson8b_ir_param = {
602 .support_hw_decoder = false,
603 .max_register = IR_DEC_REG2,
604 };
605
606 static const struct meson_ir_param meson_s4_ir_param = {
607 .support_hw_decoder = true,
608 .max_register = IR_DEC_FRAME1,
609 };
610
611 static const struct of_device_id meson_ir_match[] = {
612 {
613 .compatible = "amlogic,meson6-ir",
614 .data = &meson6_ir_param,
615 }, {
616 .compatible = "amlogic,meson8b-ir",
617 .data = &meson8b_ir_param,
618 }, {
619 .compatible = "amlogic,meson-gxbb-ir",
620 .data = &meson8b_ir_param,
621 }, {
622 .compatible = "amlogic,meson-s4-ir",
623 .data = &meson_s4_ir_param,
624 },
625 {},
626 };
627 MODULE_DEVICE_TABLE(of, meson_ir_match);
628
629 static struct platform_driver meson_ir_driver = {
630 .probe = meson_ir_probe,
631 .remove_new = meson_ir_remove,
632 .shutdown = meson_ir_shutdown,
633 .driver = {
634 .name = DRIVER_NAME,
635 .of_match_table = meson_ir_match,
636 .pm = pm_ptr(&meson_ir_pm_ops),
637 },
638 };
639
640 module_platform_driver(meson_ir_driver);
641
642 MODULE_DESCRIPTION("Amlogic Meson IR remote receiver driver");
643 MODULE_AUTHOR("Beniamino Galvani <b.galvani@gmail.com>");
644 MODULE_LICENSE("GPL v2");
645