1// SPDX-License-Identifier: GPL-2.0+
2// Copyright 2018-2021 NXP
3
4#include <linux/clk.h>
5#include <linux/clk-provider.h>
6#include <linux/delay.h>
7#include <linux/dmaengine.h>
8#include <linux/module.h>
9#include <linux/of.h>
10#include <linux/pm_runtime.h>
11#include <linux/rpmsg.h>
12#include <linux/slab.h>
13#include <sound/core.h>
14#include <sound/dmaengine_pcm.h>
15#include <sound/pcm_params.h>
16
17#include "fsl_rpmsg.h"
18#include "imx-pcm.h"
19
20#define FSL_RPMSG_RATES (SNDRV_PCM_RATE_8000 | \
21 SNDRV_PCM_RATE_16000 | \
22 SNDRV_PCM_RATE_48000)
23#define FSL_RPMSG_FORMATS SNDRV_PCM_FMTBIT_S16_LE
24
25/* 192kHz/32bit/2ch/60s size is 0x574e00 */
26#define LPA_LARGE_BUFFER_SIZE (0x6000000)
27
28static const unsigned int fsl_rpmsg_rates[] = {
29 8000, 11025, 16000, 22050, 44100,
30 32000, 48000, 96000, 88200, 176400, 192000,
31 352800, 384000, 705600, 768000, 1411200, 2822400,
32};
33
34static const struct snd_pcm_hw_constraint_list fsl_rpmsg_rate_constraints = {
35 .count = ARRAY_SIZE(fsl_rpmsg_rates),
36 .list = fsl_rpmsg_rates,
37};
38
39static int fsl_rpmsg_hw_params(struct snd_pcm_substream *substream,
40 struct snd_pcm_hw_params *params,
41 struct snd_soc_dai *dai)
42{
43 struct fsl_rpmsg *rpmsg = snd_soc_dai_get_drvdata(dai);
44 struct clk *p = rpmsg->mclk, *pll = NULL, *npll = NULL;
45 u64 rate = params_rate(p: params);
46 int ret = 0;
47
48 /* Get current pll parent */
49 while (p && rpmsg->pll8k && rpmsg->pll11k) {
50 struct clk *pp = clk_get_parent(clk: p);
51
52 if (clk_is_match(p: pp, q: rpmsg->pll8k) ||
53 clk_is_match(p: pp, q: rpmsg->pll11k)) {
54 pll = pp;
55 break;
56 }
57 p = pp;
58 }
59
60 /* Switch to another pll parent if needed. */
61 if (pll) {
62 npll = (do_div(rate, 8000) ? rpmsg->pll11k : rpmsg->pll8k);
63 if (!clk_is_match(p: pll, q: npll)) {
64 ret = clk_set_parent(clk: p, parent: npll);
65 if (ret < 0)
66 dev_warn(dai->dev, "failed to set parent %s: %d\n",
67 __clk_get_name(npll), ret);
68 }
69 }
70
71 if (!(rpmsg->mclk_streams & BIT(substream->stream))) {
72 ret = clk_prepare_enable(clk: rpmsg->mclk);
73 if (ret) {
74 dev_err(dai->dev, "failed to enable mclk: %d\n", ret);
75 return ret;
76 }
77
78 rpmsg->mclk_streams |= BIT(substream->stream);
79 }
80
81 return ret;
82}
83
84static int fsl_rpmsg_hw_free(struct snd_pcm_substream *substream,
85 struct snd_soc_dai *dai)
86{
87 struct fsl_rpmsg *rpmsg = snd_soc_dai_get_drvdata(dai);
88
89 if (rpmsg->mclk_streams & BIT(substream->stream)) {
90 clk_disable_unprepare(clk: rpmsg->mclk);
91 rpmsg->mclk_streams &= ~BIT(substream->stream);
92 }
93
94 return 0;
95}
96
97static int fsl_rpmsg_startup(struct snd_pcm_substream *substream,
98 struct snd_soc_dai *cpu_dai)
99{
100 int ret;
101
102 ret = snd_pcm_hw_constraint_list(runtime: substream->runtime, cond: 0,
103 SNDRV_PCM_HW_PARAM_RATE,
104 l: &fsl_rpmsg_rate_constraints);
105
106 return ret;
107}
108
109static const struct snd_soc_dai_ops fsl_rpmsg_dai_ops = {
110 .startup = fsl_rpmsg_startup,
111 .hw_params = fsl_rpmsg_hw_params,
112 .hw_free = fsl_rpmsg_hw_free,
113};
114
115static struct snd_soc_dai_driver fsl_rpmsg_dai = {
116 .playback = {
117 .stream_name = "CPU-Playback",
118 .channels_min = 2,
119 .channels_max = 32,
120 .rates = SNDRV_PCM_RATE_KNOT,
121 .formats = FSL_RPMSG_FORMATS,
122 },
123 .capture = {
124 .stream_name = "CPU-Capture",
125 .channels_min = 2,
126 .channels_max = 32,
127 .rates = SNDRV_PCM_RATE_KNOT,
128 .formats = FSL_RPMSG_FORMATS,
129 },
130 .symmetric_rate = 1,
131 .symmetric_channels = 1,
132 .symmetric_sample_bits = 1,
133 .ops = &fsl_rpmsg_dai_ops,
134};
135
136static const struct snd_soc_component_driver fsl_component = {
137 .name = "fsl-rpmsg",
138 .legacy_dai_naming = 1,
139};
140
141static const struct fsl_rpmsg_soc_data imx7ulp_data = {
142 .rates = SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_16000 |
143 SNDRV_PCM_RATE_48000,
144 .formats = SNDRV_PCM_FMTBIT_S16_LE,
145};
146
147static const struct fsl_rpmsg_soc_data imx8mm_data = {
148 .rates = SNDRV_PCM_RATE_KNOT,
149 .formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S24_LE |
150 SNDRV_PCM_FMTBIT_S32_LE | SNDRV_PCM_FMTBIT_DSD_U8 |
151 SNDRV_PCM_FMTBIT_DSD_U16_LE | SNDRV_PCM_FMTBIT_DSD_U32_LE,
152};
153
154static const struct fsl_rpmsg_soc_data imx8mn_data = {
155 .rates = SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 |
156 SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_88200 |
157 SNDRV_PCM_RATE_96000 | SNDRV_PCM_RATE_176400 |
158 SNDRV_PCM_RATE_192000,
159 .formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S24_LE |
160 SNDRV_PCM_FMTBIT_S32_LE,
161};
162
163static const struct fsl_rpmsg_soc_data imx8mp_data = {
164 .rates = SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 |
165 SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_88200 |
166 SNDRV_PCM_RATE_96000 | SNDRV_PCM_RATE_176400 |
167 SNDRV_PCM_RATE_192000,
168 .formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S24_LE |
169 SNDRV_PCM_FMTBIT_S32_LE,
170};
171
172static const struct fsl_rpmsg_soc_data imx93_data = {
173 .rates = SNDRV_PCM_RATE_16000 | SNDRV_PCM_RATE_32000 |
174 SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_96000,
175 .formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S24_LE |
176 SNDRV_PCM_FMTBIT_S32_LE,
177};
178
179static const struct of_device_id fsl_rpmsg_ids[] = {
180 { .compatible = "fsl,imx7ulp-rpmsg-audio", .data = &imx7ulp_data},
181 { .compatible = "fsl,imx8mm-rpmsg-audio", .data = &imx8mm_data},
182 { .compatible = "fsl,imx8mn-rpmsg-audio", .data = &imx8mn_data},
183 { .compatible = "fsl,imx8mp-rpmsg-audio", .data = &imx8mp_data},
184 { .compatible = "fsl,imx8ulp-rpmsg-audio", .data = &imx7ulp_data},
185 { .compatible = "fsl,imx93-rpmsg-audio", .data = &imx93_data},
186 { /* sentinel */ }
187};
188MODULE_DEVICE_TABLE(of, fsl_rpmsg_ids);
189
190static int fsl_rpmsg_probe(struct platform_device *pdev)
191{
192 struct device_node *np = pdev->dev.of_node;
193 struct fsl_rpmsg *rpmsg;
194 int ret;
195
196 rpmsg = devm_kzalloc(dev: &pdev->dev, size: sizeof(struct fsl_rpmsg), GFP_KERNEL);
197 if (!rpmsg)
198 return -ENOMEM;
199
200 rpmsg->soc_data = of_device_get_match_data(dev: &pdev->dev);
201
202 fsl_rpmsg_dai.playback.rates = rpmsg->soc_data->rates;
203 fsl_rpmsg_dai.capture.rates = rpmsg->soc_data->rates;
204 fsl_rpmsg_dai.playback.formats = rpmsg->soc_data->formats;
205 fsl_rpmsg_dai.capture.formats = rpmsg->soc_data->formats;
206
207 if (of_property_read_bool(np, propname: "fsl,enable-lpa")) {
208 rpmsg->enable_lpa = 1;
209 rpmsg->buffer_size = LPA_LARGE_BUFFER_SIZE;
210 } else {
211 rpmsg->buffer_size = IMX_DEFAULT_DMABUF_SIZE;
212 }
213
214 /* Get the optional clocks */
215 rpmsg->ipg = devm_clk_get_optional(dev: &pdev->dev, id: "ipg");
216 if (IS_ERR(ptr: rpmsg->ipg))
217 return PTR_ERR(ptr: rpmsg->ipg);
218
219 rpmsg->mclk = devm_clk_get_optional(dev: &pdev->dev, id: "mclk");
220 if (IS_ERR(ptr: rpmsg->mclk))
221 return PTR_ERR(ptr: rpmsg->mclk);
222
223 rpmsg->dma = devm_clk_get_optional(dev: &pdev->dev, id: "dma");
224 if (IS_ERR(ptr: rpmsg->dma))
225 return PTR_ERR(ptr: rpmsg->dma);
226
227 rpmsg->pll8k = devm_clk_get_optional(dev: &pdev->dev, id: "pll8k");
228 if (IS_ERR(ptr: rpmsg->pll8k))
229 return PTR_ERR(ptr: rpmsg->pll8k);
230
231 rpmsg->pll11k = devm_clk_get_optional(dev: &pdev->dev, id: "pll11k");
232 if (IS_ERR(ptr: rpmsg->pll11k))
233 return PTR_ERR(ptr: rpmsg->pll11k);
234
235 platform_set_drvdata(pdev, data: rpmsg);
236 pm_runtime_enable(dev: &pdev->dev);
237
238 ret = devm_snd_soc_register_component(dev: &pdev->dev, component_driver: &fsl_component,
239 dai_drv: &fsl_rpmsg_dai, num_dai: 1);
240 if (ret)
241 goto err_pm_disable;
242
243 rpmsg->card_pdev = platform_device_register_data(parent: &pdev->dev,
244 name: "imx-audio-rpmsg",
245 PLATFORM_DEVID_AUTO,
246 NULL,
247 size: 0);
248 if (IS_ERR(ptr: rpmsg->card_pdev)) {
249 dev_err(&pdev->dev, "failed to register rpmsg card\n");
250 ret = PTR_ERR(ptr: rpmsg->card_pdev);
251 goto err_pm_disable;
252 }
253
254 return 0;
255
256err_pm_disable:
257 pm_runtime_disable(dev: &pdev->dev);
258 return ret;
259}
260
261static void fsl_rpmsg_remove(struct platform_device *pdev)
262{
263 struct fsl_rpmsg *rpmsg = platform_get_drvdata(pdev);
264
265 pm_runtime_disable(dev: &pdev->dev);
266
267 if (rpmsg->card_pdev)
268 platform_device_unregister(rpmsg->card_pdev);
269}
270
271#ifdef CONFIG_PM
272static int fsl_rpmsg_runtime_resume(struct device *dev)
273{
274 struct fsl_rpmsg *rpmsg = dev_get_drvdata(dev);
275 int ret;
276
277 ret = clk_prepare_enable(clk: rpmsg->ipg);
278 if (ret) {
279 dev_err(dev, "failed to enable ipg clock: %d\n", ret);
280 goto ipg_err;
281 }
282
283 ret = clk_prepare_enable(clk: rpmsg->dma);
284 if (ret) {
285 dev_err(dev, "Failed to enable dma clock %d\n", ret);
286 goto dma_err;
287 }
288
289 return 0;
290
291dma_err:
292 clk_disable_unprepare(clk: rpmsg->ipg);
293ipg_err:
294 return ret;
295}
296
297static int fsl_rpmsg_runtime_suspend(struct device *dev)
298{
299 struct fsl_rpmsg *rpmsg = dev_get_drvdata(dev);
300
301 clk_disable_unprepare(clk: rpmsg->dma);
302 clk_disable_unprepare(clk: rpmsg->ipg);
303
304 return 0;
305}
306#endif
307
308static const struct dev_pm_ops fsl_rpmsg_pm_ops = {
309 SET_RUNTIME_PM_OPS(fsl_rpmsg_runtime_suspend,
310 fsl_rpmsg_runtime_resume,
311 NULL)
312};
313
314static struct platform_driver fsl_rpmsg_driver = {
315 .probe = fsl_rpmsg_probe,
316 .remove_new = fsl_rpmsg_remove,
317 .driver = {
318 .name = "fsl_rpmsg",
319 .pm = &fsl_rpmsg_pm_ops,
320 .of_match_table = fsl_rpmsg_ids,
321 },
322};
323module_platform_driver(fsl_rpmsg_driver);
324
325MODULE_DESCRIPTION("Freescale SoC Audio PRMSG CPU Interface");
326MODULE_AUTHOR("Shengjiu Wang <shengjiu.wang@nxp.com>");
327MODULE_ALIAS("platform:fsl_rpmsg");
328MODULE_LICENSE("GPL");
329

source code of linux/sound/soc/fsl/fsl_rpmsg.c