summaryrefslogtreecommitdiff
path: root/sound/soc/codecs/rt700-sdw.c
blob: d4e0f953bcce6da6ac2154eca76665a6636c674f (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
// SPDX-License-Identifier: GPL-2.0
//
// rt700-sdw.c -- rt700 ALSA SoC audio driver
//
// Copyright(c) 2019 Realtek Semiconductor Corp.
//
//

#include <linux/delay.h>
#include <linux/device.h>
#include <linux/mod_devicetable.h>
#include <linux/soundwire/sdw.h>
#include <linux/soundwire/sdw_type.h>
#include <linux/module.h>
#include <linux/regmap.h>
#include <sound/soc.h>
#include "rt700.h"
#include "rt700-sdw.h"

static bool rt700_readable_register(struct device *dev, unsigned int reg)
{
	switch (reg) {
	case 0x00e0:
	case 0x00f0:
	case 0x2000 ... 0x200e:
	case 0x2012 ... 0x2016:
	case 0x201a ... 0x2027:
	case 0x2029 ... 0x202a:
	case 0x202d ... 0x2034:
	case 0x2200 ... 0x2204:
	case 0x2206 ... 0x2212:
	case 0x2220 ... 0x2223:
	case 0x2230 ... 0x2231:
	case 0x3000 ... 0x3fff:
	case 0x7000 ... 0x7fff:
	case 0x8300 ... 0x83ff:
	case 0x9c00 ... 0x9cff:
	case 0xb900 ... 0xb9ff:
	case 0x75201a:
	case 0x752045:
	case 0x752046:
	case 0x752048:
	case 0x75204a:
	case 0x75206b:
	case 0x752080:
	case 0x752081:
		return true;
	default:
		return false;
	}
}

static bool rt700_volatile_register(struct device *dev, unsigned int reg)
{
	switch (reg) {
	case 0x2009:
	case 0x2016:
	case 0x201b:
	case 0x201c:
	case 0x201d:
	case 0x201f:
	case 0x2021:
	case 0x2023:
	case 0x2230:
	case 0x200b ... 0x200e: /* i2c read */
	case 0x2012 ... 0x2015: /* HD-A read */
	case 0x202d ... 0x202f: /* BRA */
	case 0x2201 ... 0x2212: /* i2c debug */
	case 0x2220 ... 0x2223: /* decoded HD-A */
	case 0x9c00 ... 0x9cff:
	case 0xb900 ... 0xb9ff:
	case 0xff01:
	case 0x75201a:
	case 0x752046:
	case 0x752080:
	case 0x752081:
		return true;
	default:
		return false;
	}
}

static int rt700_sdw_read(void *context, unsigned int reg, unsigned int *val)
{
	struct device *dev = context;
	struct rt700_priv *rt700 = dev_get_drvdata(dev);
	unsigned int sdw_data_3, sdw_data_2, sdw_data_1, sdw_data_0;
	unsigned int reg2 = 0, reg3 = 0, reg4 = 0, mask, nid, val2;
	unsigned int is_hda_reg = 1, is_index_reg = 0;
	int ret;

	if (reg > 0xffff)
		is_index_reg = 1;

	mask = reg & 0xf000;

	if (is_index_reg) { /* index registers */
		val2 = reg & 0xff;
		reg = reg >> 8;
		nid = reg & 0xff;
		ret = regmap_write(rt700->sdw_regmap, reg, 0);
		if (ret < 0)
			return ret;
		reg2 = reg + 0x1000;
		reg2 |= 0x80;
		ret = regmap_write(rt700->sdw_regmap, reg2, val2);
		if (ret < 0)
			return ret;

		reg3 = RT700_PRIV_DATA_R_H | nid;
		ret = regmap_write(rt700->sdw_regmap,
			reg3, ((*val >> 8) & 0xff));
		if (ret < 0)
			return ret;
		reg4 = reg3 + 0x1000;
		reg4 |= 0x80;
		ret = regmap_write(rt700->sdw_regmap, reg4, (*val & 0xff));
		if (ret < 0)
			return ret;
	} else if (mask   == 0x3000) {
		reg += 0x8000;
		ret = regmap_write(rt700->sdw_regmap, reg, *val);
		if (ret < 0)
			return ret;
	} else if (mask == 0x7000) {
		reg += 0x2000;
		reg |= 0x800;
		ret = regmap_write(rt700->sdw_regmap,
			reg, ((*val >> 8) & 0xff));
		if (ret < 0)
			return ret;
		reg2 = reg + 0x1000;
		reg2 |= 0x80;
		ret = regmap_write(rt700->sdw_regmap, reg2, (*val & 0xff));
		if (ret < 0)
			return ret;
	} else if ((reg & 0xff00) == 0x8300) { /* for R channel */
		reg2 = reg - 0x1000;
		reg2 &= ~0x80;
		ret = regmap_write(rt700->sdw_regmap,
			reg2, ((*val >> 8) & 0xff));
		if (ret < 0)
			return ret;
		ret = regmap_write(rt700->sdw_regmap, reg, (*val & 0xff));
		if (ret < 0)
			return ret;
	} else if (mask == 0x9000) {
		ret = regmap_write(rt700->sdw_regmap,
			reg, ((*val >> 8) & 0xff));
		if (ret < 0)
			return ret;
		reg2 = reg + 0x1000;
		reg2 |= 0x80;
		ret = regmap_write(rt700->sdw_regmap, reg2, (*val & 0xff));
		if (ret < 0)
			return ret;
	} else if (mask == 0xb000) {
		ret = regmap_write(rt700->sdw_regmap, reg, *val);
		if (ret < 0)
			return ret;
	} else {
		ret = regmap_read(rt700->sdw_regmap, reg, val);
		if (ret < 0)
			return ret;
		is_hda_reg = 0;
	}

	if (is_hda_reg || is_index_reg) {
		sdw_data_3 = 0;
		sdw_data_2 = 0;
		sdw_data_1 = 0;
		sdw_data_0 = 0;
		ret = regmap_read(rt700->sdw_regmap,
			RT700_READ_HDA_3, &sdw_data_3);
		if (ret < 0)
			return ret;
		ret = regmap_read(rt700->sdw_regmap,
			RT700_READ_HDA_2, &sdw_data_2);
		if (ret < 0)
			return ret;
		ret = regmap_read(rt700->sdw_regmap,
			RT700_READ_HDA_1, &sdw_data_1);
		if (ret < 0)
			return ret;
		ret = regmap_read(rt700->sdw_regmap,
			RT700_READ_HDA_0, &sdw_data_0);
		if (ret < 0)
			return ret;
		*val = ((sdw_data_3 & 0xff) << 24) |
			((sdw_data_2 & 0xff) << 16) |
			((sdw_data_1 & 0xff) << 8) | (sdw_data_0 & 0xff);
	}

	if (is_hda_reg == 0)
		dev_dbg(dev, "[%s] %04x => %08x\n", __func__, reg, *val);
	else if (is_index_reg)
		dev_dbg(dev, "[%s] %04x %04x %04x %04x => %08x\n",
			__func__, reg, reg2, reg3, reg4, *val);
	else
		dev_dbg(dev, "[%s] %04x %04x => %08x\n",
			__func__, reg, reg2, *val);

	return 0;
}

static int rt700_sdw_write(void *context, unsigned int reg, unsigned int val)
{
	struct device *dev = context;
	struct rt700_priv *rt700 = dev_get_drvdata(dev);
	unsigned int reg2 = 0, reg3, reg4, nid, mask, val2;
	unsigned int is_index_reg = 0;
	int ret;

	if (reg > 0xffff)
		is_index_reg = 1;

	mask = reg & 0xf000;

	if (is_index_reg) { /* index registers */
		val2 = reg & 0xff;
		reg = reg >> 8;
		nid = reg & 0xff;
		ret = regmap_write(rt700->sdw_regmap, reg, 0);
		if (ret < 0)
			return ret;
		reg2 = reg + 0x1000;
		reg2 |= 0x80;
		ret = regmap_write(rt700->sdw_regmap, reg2, val2);
		if (ret < 0)
			return ret;

		reg3 = RT700_PRIV_DATA_W_H | nid;
		ret = regmap_write(rt700->sdw_regmap,
			reg3, ((val >> 8) & 0xff));
		if (ret < 0)
			return ret;
		reg4 = reg3 + 0x1000;
		reg4 |= 0x80;
		ret = regmap_write(rt700->sdw_regmap, reg4, (val & 0xff));
		if (ret < 0)
			return ret;
		is_index_reg = 1;
	} else if (reg < 0x4fff) {
		ret = regmap_write(rt700->sdw_regmap, reg, val);
		if (ret < 0)
			return ret;
	} else if (reg == 0xff01) {
		ret = regmap_write(rt700->sdw_regmap, reg, val);
		if (ret < 0)
			return ret;
	} else if (mask == 0x7000) {
		ret = regmap_write(rt700->sdw_regmap,
			reg, ((val >> 8) & 0xff));
		if (ret < 0)
			return ret;
		reg2 = reg + 0x1000;
		reg2 |= 0x80;
		ret = regmap_write(rt700->sdw_regmap, reg2, (val & 0xff));
		if (ret < 0)
			return ret;
	} else if ((reg & 0xff00) == 0x8300) {  /* for R channel */
		reg2 = reg - 0x1000;
		reg2 &= ~0x80;
		ret = regmap_write(rt700->sdw_regmap,
			reg2, ((val >> 8) & 0xff));
		if (ret < 0)
			return ret;
		ret = regmap_write(rt700->sdw_regmap, reg, (val & 0xff));
		if (ret < 0)
			return ret;
	}

	if (reg2 == 0)
		dev_dbg(dev, "[%s] %04x <= %04x\n", __func__, reg, val);
	else if (is_index_reg)
		dev_dbg(dev, "[%s] %04x %04x %04x %04x <= %04x %04x\n",
			__func__, reg, reg2, reg3, reg4, val2, val);
	else
		dev_dbg(dev, "[%s] %04x %04x <= %04x\n",
			__func__, reg, reg2, val);

	return 0;
}

static const struct regmap_config rt700_regmap = {
	.reg_bits = 24,
	.val_bits = 32,
	.readable_reg = rt700_readable_register,
	.volatile_reg = rt700_volatile_register,
	.max_register = 0x755800,
	.reg_defaults = rt700_reg_defaults,
	.num_reg_defaults = ARRAY_SIZE(rt700_reg_defaults),
	.cache_type = REGCACHE_RBTREE,
	.use_single_read = true,
	.use_single_write = true,
	.reg_read = rt700_sdw_read,
	.reg_write = rt700_sdw_write,
};

static const struct regmap_config rt700_sdw_regmap = {
	.name = "sdw",
	.reg_bits = 32,
	.val_bits = 8,
	.readable_reg = rt700_readable_register,
	.max_register = 0xff01,
	.cache_type = REGCACHE_NONE,
	.use_single_read = true,
	.use_single_write = true,
};

static int rt700_update_status(struct sdw_slave *slave,
					enum sdw_slave_status status)
{
	struct rt700_priv *rt700 = dev_get_drvdata(&slave->dev);

	/* Update the status */
	rt700->status = status;

	if (status == SDW_SLAVE_UNATTACHED)
		rt700->hw_init = false;

	/*
	 * Perform initialization only if slave status is present and
	 * hw_init flag is false
	 */
	if (rt700->hw_init || rt700->status != SDW_SLAVE_ATTACHED)
		return 0;

	/* perform I/O transfers required for Slave initialization */
	return rt700_io_init(&slave->dev, slave);
}

static int rt700_read_prop(struct sdw_slave *slave)
{
	struct sdw_slave_prop *prop = &slave->prop;
	int nval, i, num_of_ports = 1;
	u32 bit;
	unsigned long addr;
	struct sdw_dpn_prop *dpn;

	prop->paging_support = false;

	/* first we need to allocate memory for set bits in port lists */
	prop->source_ports = 0x14; /* BITMAP: 00010100 */
	prop->sink_ports = 0xA; /* BITMAP:  00001010 */

	nval = hweight32(prop->source_ports);
	num_of_ports += nval;
	prop->src_dpn_prop = devm_kcalloc(&slave->dev, nval,
						sizeof(*prop->src_dpn_prop),
						GFP_KERNEL);
	if (!prop->src_dpn_prop)
		return -ENOMEM;

	i = 0;
	dpn = prop->src_dpn_prop;
	addr = prop->source_ports;
	for_each_set_bit(bit, &addr, 32) {
		dpn[i].num = bit;
		dpn[i].type = SDW_DPN_FULL;
		dpn[i].simple_ch_prep_sm = true;
		dpn[i].ch_prep_timeout = 10;
		i++;
	}

	/* do this again for sink now */
	nval = hweight32(prop->sink_ports);
	num_of_ports += nval;
	prop->sink_dpn_prop = devm_kcalloc(&slave->dev, nval,
						sizeof(*prop->sink_dpn_prop),
						GFP_KERNEL);
	if (!prop->sink_dpn_prop)
		return -ENOMEM;

	i = 0;
	dpn = prop->sink_dpn_prop;
	addr = prop->sink_ports;
	for_each_set_bit(bit, &addr, 32) {
		dpn[i].num = bit;
		dpn[i].type = SDW_DPN_FULL;
		dpn[i].simple_ch_prep_sm = true;
		dpn[i].ch_prep_timeout = 10;
		i++;
	}

	/* Allocate port_ready based on num_of_ports */
	slave->port_ready = devm_kcalloc(&slave->dev, num_of_ports,
					sizeof(*slave->port_ready),
					GFP_KERNEL);
	if (!slave->port_ready)
		return -ENOMEM;

	/* Initialize completion */
	for (i = 0; i < num_of_ports; i++)
		init_completion(&slave->port_ready[i]);

	/* set the timeout values */
	prop->clk_stop_timeout = 20;

	/* wake-up event */
	prop->wake_capable = 1;

	return 0;
}

static int rt700_bus_config(struct sdw_slave *slave,
				struct sdw_bus_params *params)
{
	struct rt700_priv *rt700 = dev_get_drvdata(&slave->dev);
	int ret;

	memcpy(&rt700->params, params, sizeof(*params));

	ret = rt700_clock_config(&slave->dev);
	if (ret < 0)
		dev_err(&slave->dev, "Invalid clk config");

	return ret;
}

static int rt700_interrupt_callback(struct sdw_slave *slave,
					struct sdw_slave_intr_status *status)
{
	struct rt700_priv *rt700 = dev_get_drvdata(&slave->dev);

	dev_dbg(&slave->dev,
		"%s control_port_stat=%x", __func__, status->control_port);

	if (status->control_port & 0x4) {
		mod_delayed_work(system_power_efficient_wq,
			&rt700->jack_detect_work, msecs_to_jiffies(250));
	}

	return 0;
}

/*
 * slave_ops: callbacks for get_clock_stop_mode, clock_stop and
 * port_prep are not defined for now
 */
static struct sdw_slave_ops rt700_slave_ops = {
	.read_prop = rt700_read_prop,
	.interrupt_callback = rt700_interrupt_callback,
	.update_status = rt700_update_status,
	.bus_config = rt700_bus_config,
};

static int rt700_sdw_probe(struct sdw_slave *slave,
				const struct sdw_device_id *id)
{
	struct regmap *sdw_regmap, *regmap;

	/* Assign ops */
	slave->ops = &rt700_slave_ops;

	/* Regmap Initialization */
	sdw_regmap = devm_regmap_init_sdw(slave, &rt700_sdw_regmap);
	if (!sdw_regmap)
		return -EINVAL;

	regmap = devm_regmap_init(&slave->dev, NULL,
		&slave->dev, &rt700_regmap);
	if (IS_ERR(regmap))
		return PTR_ERR(regmap);

	rt700_init(&slave->dev, sdw_regmap, regmap, slave);

	return 0;
}

static int rt700_sdw_remove(struct sdw_slave *slave)
{
	struct rt700_priv *rt700 = dev_get_drvdata(&slave->dev);

	if (rt700 && rt700->hw_init) {
		cancel_delayed_work(&rt700->jack_detect_work);
		cancel_delayed_work(&rt700->jack_btn_check_work);
	}

	return 0;
}

static const struct sdw_device_id rt700_id[] = {
	SDW_SLAVE_ENTRY(0x025d, 0x700, 0),
	{},
};
MODULE_DEVICE_TABLE(sdw, rt700_id);

static int __maybe_unused rt700_dev_suspend(struct device *dev)
{
	struct rt700_priv *rt700 = dev_get_drvdata(dev);

	if (!rt700->hw_init)
		return 0;

	regcache_cache_only(rt700->regmap, true);

	return 0;
}

#define RT700_PROBE_TIMEOUT 2000

static int __maybe_unused rt700_dev_resume(struct device *dev)
{
	struct sdw_slave *slave = dev_to_sdw_dev(dev);
	struct rt700_priv *rt700 = dev_get_drvdata(dev);
	unsigned long time;

	if (!rt700->hw_init)
		return 0;

	if (!slave->unattach_request)
		goto regmap_sync;

	time = wait_for_completion_timeout(&slave->initialization_complete,
				msecs_to_jiffies(RT700_PROBE_TIMEOUT));
	if (!time) {
		dev_err(&slave->dev, "Initialization not complete, timed out\n");
		return -ETIMEDOUT;
	}

regmap_sync:
	slave->unattach_request = 0;
	regcache_cache_only(rt700->regmap, false);
	regcache_sync_region(rt700->regmap, 0x3000, 0x8fff);
	regcache_sync_region(rt700->regmap, 0x752010, 0x75206b);

	return 0;
}

static const struct dev_pm_ops rt700_pm = {
	SET_SYSTEM_SLEEP_PM_OPS(rt700_dev_suspend, rt700_dev_resume)
	SET_RUNTIME_PM_OPS(rt700_dev_suspend, rt700_dev_resume, NULL)
};

static struct sdw_driver rt700_sdw_driver = {
	.driver = {
		.name = "rt700",
		.owner = THIS_MODULE,
		.pm = &rt700_pm,
	},
	.probe = rt700_sdw_probe,
	.remove = rt700_sdw_remove,
	.ops = &rt700_slave_ops,
	.id_table = rt700_id,
};
module_sdw_driver(rt700_sdw_driver);

MODULE_DESCRIPTION("ASoC RT700 driver SDW");
MODULE_AUTHOR("Shuming Fan <shumingf@realtek.com>");
MODULE_LICENSE("GPL v2");