summaryrefslogtreecommitdiffstats
path: root/sound/soc/zte/zx-spdif.c
blob: b4168bd532b7498be1429960d645ec3fc84aee87 (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
// SPDX-License-Identifier: GPL-2.0-only
/*
 * Copyright (C) 2015 Linaro
 *
 * Author: Jun Nie <jun.nie@linaro.org>
 */

#include <linux/clk.h>
#include <linux/device.h>
#include <linux/dmaengine.h>
#include <linux/init.h>
#include <linux/io.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/of_address.h>
#include <sound/asoundef.h>
#include <sound/core.h>
#include <sound/dmaengine_pcm.h>
#include <sound/initval.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>
#include <sound/soc.h>
#include <sound/soc-dai.h>

#define ZX_CTRL				0x04
#define ZX_FIFOCTRL			0x08
#define ZX_INT_STATUS			0x10
#define ZX_INT_MASK			0x14
#define ZX_DATA				0x18
#define ZX_VALID_BIT			0x1c
#define ZX_CH_STA_1			0x20
#define ZX_CH_STA_2			0x24
#define ZX_CH_STA_3			0x28
#define ZX_CH_STA_4			0x2c
#define ZX_CH_STA_5			0x30
#define ZX_CH_STA_6			0x34

#define ZX_CTRL_MODA_16			(0 << 6)
#define ZX_CTRL_MODA_18			BIT(6)
#define ZX_CTRL_MODA_20			(2 << 6)
#define ZX_CTRL_MODA_24			(3 << 6)
#define ZX_CTRL_MODA_MASK		(3 << 6)

#define ZX_CTRL_ENB			BIT(4)
#define ZX_CTRL_DNB			(0 << 4)
#define ZX_CTRL_ENB_MASK		BIT(4)

#define ZX_CTRL_TX_OPEN			BIT(0)
#define ZX_CTRL_TX_CLOSE		(0 << 0)
#define ZX_CTRL_TX_MASK			BIT(0)

#define ZX_CTRL_OPEN			(ZX_CTRL_TX_OPEN | ZX_CTRL_ENB)
#define ZX_CTRL_CLOSE			(ZX_CTRL_TX_CLOSE | ZX_CTRL_DNB)

#define ZX_CTRL_DOUBLE_TRACK		(0 << 8)
#define ZX_CTRL_LEFT_TRACK		BIT(8)
#define ZX_CTRL_RIGHT_TRACK		(2 << 8)
#define ZX_CTRL_TRACK_MASK		(3 << 8)

#define ZX_FIFOCTRL_TXTH_MASK		(0x1f << 8)
#define ZX_FIFOCTRL_TXTH(x)		(x << 8)
#define ZX_FIFOCTRL_TX_DMA_EN		BIT(2)
#define ZX_FIFOCTRL_TX_DMA_DIS		(0 << 2)
#define ZX_FIFOCTRL_TX_DMA_EN_MASK	BIT(2)
#define ZX_FIFOCTRL_TX_FIFO_RST		BIT(0)
#define ZX_FIFOCTRL_TX_FIFO_RST_MASK	BIT(0)

#define ZX_VALID_DOUBLE_TRACK		(0 << 0)
#define ZX_VALID_LEFT_TRACK		BIT(1)
#define ZX_VALID_RIGHT_TRACK		(2 << 0)
#define ZX_VALID_TRACK_MASK		(3 << 0)

#define ZX_SPDIF_CLK_RAT		(2 * 32)

struct zx_spdif_info {
	struct snd_dmaengine_dai_dma_data	dma_data;
	struct clk				*dai_clk;
	void __iomem				*reg_base;
	resource_size_t				mapbase;
};

static int zx_spdif_dai_probe(struct snd_soc_dai *dai)
{
	struct zx_spdif_info *zx_spdif = dev_get_drvdata(dai->dev);

	snd_soc_dai_set_drvdata(dai, zx_spdif);
	zx_spdif->dma_data.addr = zx_spdif->mapbase + ZX_DATA;
	zx_spdif->dma_data.maxburst = 8;
	snd_soc_dai_init_dma_data(dai, &zx_spdif->dma_data, NULL);
	return 0;
}

static int zx_spdif_chanstats(void __iomem *base, unsigned int rate)
{
	u32 cstas1;

	switch (rate) {
	case 22050:
		cstas1 = IEC958_AES3_CON_FS_22050;
		break;
	case 24000:
		cstas1 = IEC958_AES3_CON_FS_24000;
		break;
	case 32000:
		cstas1 = IEC958_AES3_CON_FS_32000;
		break;
	case 44100:
		cstas1 = IEC958_AES3_CON_FS_44100;
		break;
	case 48000:
		cstas1 = IEC958_AES3_CON_FS_48000;
		break;
	case 88200:
		cstas1 = IEC958_AES3_CON_FS_88200;
		break;
	case 96000:
		cstas1 = IEC958_AES3_CON_FS_96000;
		break;
	case 176400:
		cstas1 = IEC958_AES3_CON_FS_176400;
		break;
	case 192000:
		cstas1 = IEC958_AES3_CON_FS_192000;
		break;
	default:
		return -EINVAL;
	}
	cstas1 = cstas1 << 24;
	cstas1 |= IEC958_AES0_CON_NOT_COPYRIGHT;

	writel_relaxed(cstas1, base + ZX_CH_STA_1);
	return 0;
}

static int zx_spdif_hw_params(struct snd_pcm_substream *substream,
			      struct snd_pcm_hw_params *params,
			      struct snd_soc_dai *socdai)
{
	struct zx_spdif_info *zx_spdif = dev_get_drvdata(socdai->dev);
	struct zx_spdif_info *spdif = snd_soc_dai_get_drvdata(socdai);
	struct snd_dmaengine_dai_dma_data *dma_data =
		snd_soc_dai_get_dma_data(socdai, substream);
	u32 val, ch_num, rate;
	int ret;

	dma_data->addr_width = params_width(params) >> 3;

	val = readl_relaxed(zx_spdif->reg_base + ZX_CTRL);
	val &= ~ZX_CTRL_MODA_MASK;
	switch (params_format(params)) {
	case SNDRV_PCM_FORMAT_S16_LE:
		val |= ZX_CTRL_MODA_16;
		break;

	case SNDRV_PCM_FORMAT_S18_3LE:
		val |= ZX_CTRL_MODA_18;
		break;

	case SNDRV_PCM_FORMAT_S20_3LE:
		val |= ZX_CTRL_MODA_20;
		break;

	case SNDRV_PCM_FORMAT_S24_LE:
		val |= ZX_CTRL_MODA_24;
		break;
	default:
		dev_err(socdai->dev, "Format not support!\n");
		return -EINVAL;
	}

	ch_num = params_channels(params);
	if (ch_num == 2)
		val |= ZX_CTRL_DOUBLE_TRACK;
	else
		val |= ZX_CTRL_LEFT_TRACK;
	writel_relaxed(val, zx_spdif->reg_base + ZX_CTRL);

	val = readl_relaxed(zx_spdif->reg_base + ZX_VALID_BIT);
	val &= ~ZX_VALID_TRACK_MASK;
	if (ch_num == 2)
		val |= ZX_VALID_DOUBLE_TRACK;
	else
		val |= ZX_VALID_RIGHT_TRACK;
	writel_relaxed(val, zx_spdif->reg_base + ZX_VALID_BIT);

	rate = params_rate(params);
	ret = zx_spdif_chanstats(zx_spdif->reg_base, rate);
	if (ret)
		return ret;
	return clk_set_rate(spdif->dai_clk, rate * ch_num * ZX_SPDIF_CLK_RAT);
}

static void zx_spdif_cfg_tx(void __iomem *base, int on)
{
	u32 val;

	val = readl_relaxed(base + ZX_CTRL);
	val &= ~(ZX_CTRL_ENB_MASK | ZX_CTRL_TX_MASK);
	val |= on ? ZX_CTRL_OPEN : ZX_CTRL_CLOSE;
	writel_relaxed(val, base + ZX_CTRL);

	val = readl_relaxed(base + ZX_FIFOCTRL);
	val &= ~ZX_FIFOCTRL_TX_DMA_EN_MASK;
	if (on)
		val |= ZX_FIFOCTRL_TX_DMA_EN;
	writel_relaxed(val, base + ZX_FIFOCTRL);
}

static int zx_spdif_trigger(struct snd_pcm_substream *substream, int cmd,
			    struct snd_soc_dai *dai)
{
	u32 val;
	struct zx_spdif_info *zx_spdif = dev_get_drvdata(dai->dev);
	int  ret = 0;

	switch (cmd) {
	case SNDRV_PCM_TRIGGER_START:
		val = readl_relaxed(zx_spdif->reg_base + ZX_FIFOCTRL);
		val |= ZX_FIFOCTRL_TX_FIFO_RST;
		writel_relaxed(val, zx_spdif->reg_base + ZX_FIFOCTRL);
		fallthrough;
	case SNDRV_PCM_TRIGGER_RESUME:
	case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
		zx_spdif_cfg_tx(zx_spdif->reg_base, true);
		break;

	case SNDRV_PCM_TRIGGER_STOP:
	case SNDRV_PCM_TRIGGER_SUSPEND:
	case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
		zx_spdif_cfg_tx(zx_spdif->reg_base, false);
		break;

	default:
		ret = -EINVAL;
		break;
	}

	return ret;
}

static int zx_spdif_startup(struct snd_pcm_substream *substream,
			    struct snd_soc_dai *dai)
{
	struct zx_spdif_info *zx_spdif = dev_get_drvdata(dai->dev);

	return clk_prepare_enable(zx_spdif->dai_clk);
}

static void zx_spdif_shutdown(struct snd_pcm_substream *substream,
			      struct snd_soc_dai *dai)
{
	struct zx_spdif_info *zx_spdif = dev_get_drvdata(dai->dev);

	clk_disable_unprepare(zx_spdif->dai_clk);
}

#define ZX_RATES \
	(SNDRV_PCM_RATE_22050 | SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 | \
	SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_88200 | SNDRV_PCM_RATE_96000 |\
	SNDRV_PCM_RATE_176400 | SNDRV_PCM_RATE_192000)

#define ZX_FORMAT \
	(SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S18_3LE \
	| SNDRV_PCM_FMTBIT_S20_3LE | SNDRV_PCM_FMTBIT_S24_LE)

static const struct snd_soc_dai_ops zx_spdif_dai_ops = {
	.trigger	= zx_spdif_trigger,
	.startup	= zx_spdif_startup,
	.shutdown	= zx_spdif_shutdown,
	.hw_params	= zx_spdif_hw_params,
};

static struct snd_soc_dai_driver zx_spdif_dai = {
	.name = "spdif",
	.id = 0,
	.probe = zx_spdif_dai_probe,
	.playback = {
		.channels_min = 1,
		.channels_max = 2,
		.rates = ZX_RATES,
		.formats = ZX_FORMAT,
	},
	.ops = &zx_spdif_dai_ops,
};

static const struct snd_soc_component_driver zx_spdif_component = {
	.name	= "spdif",
};

static void zx_spdif_dev_init(void __iomem *base)
{
	u32 val;

	writel_relaxed(0, base + ZX_CTRL);
	writel_relaxed(0, base + ZX_INT_MASK);
	writel_relaxed(0xf, base + ZX_INT_STATUS);
	writel_relaxed(0x1, base + ZX_FIFOCTRL);

	val = readl_relaxed(base + ZX_FIFOCTRL);
	val &= ~(ZX_FIFOCTRL_TXTH_MASK | ZX_FIFOCTRL_TX_FIFO_RST_MASK);
	val |= ZX_FIFOCTRL_TXTH(8);
	writel_relaxed(val, base + ZX_FIFOCTRL);
}

static int zx_spdif_probe(struct platform_device *pdev)
{
	struct resource *res;
	struct zx_spdif_info *zx_spdif;
	int ret;

	zx_spdif = devm_kzalloc(&pdev->dev, sizeof(*zx_spdif), GFP_KERNEL);
	if (!zx_spdif)
		return -ENOMEM;

	zx_spdif->dai_clk = devm_clk_get(&pdev->dev, "tx");
	if (IS_ERR(zx_spdif->dai_clk)) {
		dev_err(&pdev->dev, "Fail to get clk\n");
		return PTR_ERR(zx_spdif->dai_clk);
	}

	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	zx_spdif->mapbase = res->start;
	zx_spdif->reg_base = devm_ioremap_resource(&pdev->dev, res);
	if (IS_ERR(zx_spdif->reg_base)) {
		return PTR_ERR(zx_spdif->reg_base);
	}

	zx_spdif_dev_init(zx_spdif->reg_base);
	platform_set_drvdata(pdev, zx_spdif);

	ret = devm_snd_soc_register_component(&pdev->dev, &zx_spdif_component,
					 &zx_spdif_dai, 1);
	if (ret) {
		dev_err(&pdev->dev, "Register DAI failed: %d\n", ret);
		return ret;
	}

	ret = devm_snd_dmaengine_pcm_register(&pdev->dev, NULL, 0);
	if (ret)
		dev_err(&pdev->dev, "Register platform PCM failed: %d\n", ret);

	return ret;
}

static const struct of_device_id zx_spdif_dt_ids[] = {
	{ .compatible = "zte,zx296702-spdif", },
	{}
};
MODULE_DEVICE_TABLE(of, zx_spdif_dt_ids);

static struct platform_driver spdif_driver = {
	.probe = zx_spdif_probe,
	.driver = {
		.name = "zx-spdif",
		.of_match_table = zx_spdif_dt_ids,
	},
};

module_platform_driver(spdif_driver);

MODULE_AUTHOR("Jun Nie <jun.nie@linaro.org>");
MODULE_DESCRIPTION("ZTE SPDIF SoC DAI");
MODULE_LICENSE("GPL");