summaryrefslogtreecommitdiff
path: root/sound/soc/fsl/fsl_rpmsg.c
blob: bf94838bdbefe47ec9a614867f9e4b84663caaba (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
// SPDX-License-Identifier: GPL-2.0+
// Copyright 2018-2021 NXP

#include <linux/clk.h>
#include <linux/clk-provider.h>
#include <linux/delay.h>
#include <linux/dmaengine.h>
#include <linux/module.h>
#include <linux/of_device.h>
#include <linux/of_address.h>
#include <linux/pm_runtime.h>
#include <linux/rpmsg.h>
#include <linux/slab.h>
#include <sound/core.h>
#include <sound/dmaengine_pcm.h>
#include <sound/pcm_params.h>

#include "fsl_rpmsg.h"
#include "imx-pcm.h"

#define FSL_RPMSG_RATES        (SNDRV_PCM_RATE_8000 | \
				SNDRV_PCM_RATE_16000 | \
				SNDRV_PCM_RATE_48000)
#define FSL_RPMSG_FORMATS	SNDRV_PCM_FMTBIT_S16_LE

/* 192kHz/32bit/2ch/60s size is 0x574e00 */
#define LPA_LARGE_BUFFER_SIZE  (0x6000000)

static const unsigned int fsl_rpmsg_rates[] = {
	8000, 11025, 16000, 22050, 44100,
	32000, 48000, 96000, 88200, 176400, 192000,
	352800, 384000, 705600, 768000, 1411200, 2822400,
};

static const struct snd_pcm_hw_constraint_list fsl_rpmsg_rate_constraints = {
	.count = ARRAY_SIZE(fsl_rpmsg_rates),
	.list = fsl_rpmsg_rates,
};

static int fsl_rpmsg_hw_params(struct snd_pcm_substream *substream,
			       struct snd_pcm_hw_params *params,
			       struct snd_soc_dai *dai)
{
	struct fsl_rpmsg *rpmsg = snd_soc_dai_get_drvdata(dai);
	struct clk *p = rpmsg->mclk, *pll = NULL, *npll = NULL;
	u64 rate = params_rate(params);
	int ret = 0;

	/* Get current pll parent */
	while (p && rpmsg->pll8k && rpmsg->pll11k) {
		struct clk *pp = clk_get_parent(p);

		if (clk_is_match(pp, rpmsg->pll8k) ||
		    clk_is_match(pp, rpmsg->pll11k)) {
			pll = pp;
			break;
		}
		p = pp;
	}

	/* Switch to another pll parent if needed. */
	if (pll) {
		npll = (do_div(rate, 8000) ? rpmsg->pll11k : rpmsg->pll8k);
		if (!clk_is_match(pll, npll)) {
			ret = clk_set_parent(p, npll);
			if (ret < 0)
				dev_warn(dai->dev, "failed to set parent %s: %d\n",
					 __clk_get_name(npll), ret);
		}
	}

	if (!(rpmsg->mclk_streams & BIT(substream->stream))) {
		ret = clk_prepare_enable(rpmsg->mclk);
		if (ret) {
			dev_err(dai->dev, "failed to enable mclk: %d\n", ret);
			return ret;
		}

		rpmsg->mclk_streams |= BIT(substream->stream);
	}

	return ret;
}

static int fsl_rpmsg_hw_free(struct snd_pcm_substream *substream,
			     struct snd_soc_dai *dai)
{
	struct fsl_rpmsg *rpmsg = snd_soc_dai_get_drvdata(dai);

	if (rpmsg->mclk_streams & BIT(substream->stream)) {
		clk_disable_unprepare(rpmsg->mclk);
		rpmsg->mclk_streams &= ~BIT(substream->stream);
	}

	return 0;
}

static int fsl_rpmsg_startup(struct snd_pcm_substream *substream,
			     struct snd_soc_dai *cpu_dai)
{
	int ret;

	ret = snd_pcm_hw_constraint_list(substream->runtime, 0,
					 SNDRV_PCM_HW_PARAM_RATE,
					 &fsl_rpmsg_rate_constraints);

	return ret;
}

static const struct snd_soc_dai_ops fsl_rpmsg_dai_ops = {
	.startup	= fsl_rpmsg_startup,
	.hw_params      = fsl_rpmsg_hw_params,
	.hw_free        = fsl_rpmsg_hw_free,
};

static struct snd_soc_dai_driver fsl_rpmsg_dai = {
	.playback = {
		.stream_name = "CPU-Playback",
		.channels_min = 2,
		.channels_max = 2,
		.rates = SNDRV_PCM_RATE_KNOT,
		.formats = FSL_RPMSG_FORMATS,
	},
	.capture = {
		.stream_name = "CPU-Capture",
		.channels_min = 2,
		.channels_max = 2,
		.rates = SNDRV_PCM_RATE_KNOT,
		.formats = FSL_RPMSG_FORMATS,
	},
	.symmetric_rate        = 1,
	.symmetric_channels    = 1,
	.symmetric_sample_bits = 1,
	.ops = &fsl_rpmsg_dai_ops,
};

static const struct snd_soc_component_driver fsl_component = {
	.name			= "fsl-rpmsg",
	.legacy_dai_naming	= 1,
};

static const struct fsl_rpmsg_soc_data imx7ulp_data = {
	.rates = SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_16000 |
		 SNDRV_PCM_RATE_48000,
	.formats = SNDRV_PCM_FMTBIT_S16_LE,
};

static const struct fsl_rpmsg_soc_data imx8mm_data = {
	.rates = SNDRV_PCM_RATE_KNOT,
	.formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S24_LE |
		   SNDRV_PCM_FMTBIT_S32_LE | SNDRV_PCM_FMTBIT_DSD_U8 |
		   SNDRV_PCM_FMTBIT_DSD_U16_LE | SNDRV_PCM_FMTBIT_DSD_U32_LE,
};

static const struct fsl_rpmsg_soc_data imx8mn_data = {
	.rates = 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,
	.formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S24_LE |
		   SNDRV_PCM_FMTBIT_S32_LE,
};

static const struct fsl_rpmsg_soc_data imx8mp_data = {
	.rates = 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,
	.formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S24_LE |
		   SNDRV_PCM_FMTBIT_S32_LE,
};

static const struct of_device_id fsl_rpmsg_ids[] = {
	{ .compatible = "fsl,imx7ulp-rpmsg-audio", .data = &imx7ulp_data},
	{ .compatible = "fsl,imx8mm-rpmsg-audio", .data = &imx8mm_data},
	{ .compatible = "fsl,imx8mn-rpmsg-audio", .data = &imx8mn_data},
	{ .compatible = "fsl,imx8mp-rpmsg-audio", .data = &imx8mp_data},
	{ .compatible = "fsl,imx8ulp-rpmsg-audio", .data = &imx7ulp_data},
	{ /* sentinel */ }
};
MODULE_DEVICE_TABLE(of, fsl_rpmsg_ids);

static int fsl_rpmsg_probe(struct platform_device *pdev)
{
	struct device_node *np = pdev->dev.of_node;
	struct fsl_rpmsg *rpmsg;
	int ret;

	rpmsg = devm_kzalloc(&pdev->dev, sizeof(struct fsl_rpmsg), GFP_KERNEL);
	if (!rpmsg)
		return -ENOMEM;

	rpmsg->soc_data = of_device_get_match_data(&pdev->dev);

	fsl_rpmsg_dai.playback.rates = rpmsg->soc_data->rates;
	fsl_rpmsg_dai.capture.rates = rpmsg->soc_data->rates;
	fsl_rpmsg_dai.playback.formats = rpmsg->soc_data->formats;
	fsl_rpmsg_dai.capture.formats = rpmsg->soc_data->formats;

	if (of_property_read_bool(np, "fsl,enable-lpa")) {
		rpmsg->enable_lpa = 1;
		rpmsg->buffer_size = LPA_LARGE_BUFFER_SIZE;
	} else {
		rpmsg->buffer_size = IMX_DEFAULT_DMABUF_SIZE;
	}

	/* Get the optional clocks */
	rpmsg->ipg = devm_clk_get_optional(&pdev->dev, "ipg");
	if (IS_ERR(rpmsg->ipg))
		return PTR_ERR(rpmsg->ipg);

	rpmsg->mclk = devm_clk_get_optional(&pdev->dev, "mclk");
	if (IS_ERR(rpmsg->mclk))
		return PTR_ERR(rpmsg->mclk);

	rpmsg->dma = devm_clk_get_optional(&pdev->dev, "dma");
	if (IS_ERR(rpmsg->dma))
		return PTR_ERR(rpmsg->dma);

	rpmsg->pll8k = devm_clk_get_optional(&pdev->dev, "pll8k");
	if (IS_ERR(rpmsg->pll8k))
		return PTR_ERR(rpmsg->pll8k);

	rpmsg->pll11k = devm_clk_get_optional(&pdev->dev, "pll11k");
	if (IS_ERR(rpmsg->pll11k))
		return PTR_ERR(rpmsg->pll11k);

	platform_set_drvdata(pdev, rpmsg);
	pm_runtime_enable(&pdev->dev);

	ret = devm_snd_soc_register_component(&pdev->dev, &fsl_component,
					      &fsl_rpmsg_dai, 1);
	if (ret)
		return ret;

	rpmsg->card_pdev = platform_device_register_data(&pdev->dev,
							 "imx-audio-rpmsg",
							 PLATFORM_DEVID_NONE,
							 NULL,
							 0);
	if (IS_ERR(rpmsg->card_pdev)) {
		dev_err(&pdev->dev, "failed to register rpmsg card\n");
		ret = PTR_ERR(rpmsg->card_pdev);
		return ret;
	}

	return 0;
}

static int fsl_rpmsg_remove(struct platform_device *pdev)
{
	struct fsl_rpmsg *rpmsg = platform_get_drvdata(pdev);

	if (rpmsg->card_pdev)
		platform_device_unregister(rpmsg->card_pdev);

	return 0;
}

#ifdef CONFIG_PM
static int fsl_rpmsg_runtime_resume(struct device *dev)
{
	struct fsl_rpmsg *rpmsg = dev_get_drvdata(dev);
	int ret;

	ret = clk_prepare_enable(rpmsg->ipg);
	if (ret) {
		dev_err(dev, "failed to enable ipg clock: %d\n", ret);
		goto ipg_err;
	}

	ret = clk_prepare_enable(rpmsg->dma);
	if (ret) {
		dev_err(dev, "Failed to enable dma clock %d\n", ret);
		goto dma_err;
	}

	return 0;

dma_err:
	clk_disable_unprepare(rpmsg->ipg);
ipg_err:
	return ret;
}

static int fsl_rpmsg_runtime_suspend(struct device *dev)
{
	struct fsl_rpmsg *rpmsg = dev_get_drvdata(dev);

	clk_disable_unprepare(rpmsg->dma);
	clk_disable_unprepare(rpmsg->ipg);

	return 0;
}
#endif

static const struct dev_pm_ops fsl_rpmsg_pm_ops = {
	SET_RUNTIME_PM_OPS(fsl_rpmsg_runtime_suspend,
			   fsl_rpmsg_runtime_resume,
			   NULL)
};

static struct platform_driver fsl_rpmsg_driver = {
	.probe  = fsl_rpmsg_probe,
	.remove = fsl_rpmsg_remove,
	.driver = {
		.name = "fsl_rpmsg",
		.pm = &fsl_rpmsg_pm_ops,
		.of_match_table = fsl_rpmsg_ids,
	},
};
module_platform_driver(fsl_rpmsg_driver);

MODULE_DESCRIPTION("Freescale SoC Audio PRMSG CPU Interface");
MODULE_AUTHOR("Shengjiu Wang <shengjiu.wang@nxp.com>");
MODULE_ALIAS("platform:fsl_rpmsg");
MODULE_LICENSE("GPL");