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_device.h>
10 #include <linux/of_address.h>
11 #include <linux/pm_runtime.h>
12 #include <linux/rpmsg.h>
13 #include <linux/slab.h>
14 #include <sound/core.h>
15 #include <sound/dmaengine_pcm.h>
16 #include <sound/pcm_params.h>
17
18 #include "fsl_rpmsg.h"
19 #include "imx-pcm.h"
20
21 #define FSL_RPMSG_RATES (SNDRV_PCM_RATE_8000 | \
22 SNDRV_PCM_RATE_16000 | \
23 SNDRV_PCM_RATE_48000)
24 #define FSL_RPMSG_FORMATS SNDRV_PCM_FMTBIT_S16_LE
25
26 /* 192kHz/32bit/2ch/60s size is 0x574e00 */
27 #define LPA_LARGE_BUFFER_SIZE (0x6000000)
28
29 static const unsigned int fsl_rpmsg_rates[] = {
30 8000, 11025, 16000, 22050, 44100,
31 32000, 48000, 96000, 88200, 176400, 192000,
32 352800, 384000, 705600, 768000, 1411200, 2822400,
33 };
34
35 static const struct snd_pcm_hw_constraint_list fsl_rpmsg_rate_constraints = {
36 .count = ARRAY_SIZE(fsl_rpmsg_rates),
37 .list = fsl_rpmsg_rates,
38 };
39
fsl_rpmsg_hw_params(struct snd_pcm_substream * substream,struct snd_pcm_hw_params * params,struct snd_soc_dai * dai)40 static int fsl_rpmsg_hw_params(struct snd_pcm_substream *substream,
41 struct snd_pcm_hw_params *params,
42 struct snd_soc_dai *dai)
43 {
44 struct fsl_rpmsg *rpmsg = snd_soc_dai_get_drvdata(dai);
45 struct clk *p = rpmsg->mclk, *pll = NULL, *npll = NULL;
46 u64 rate = params_rate(params);
47 int ret = 0;
48
49 /* Get current pll parent */
50 while (p && rpmsg->pll8k && rpmsg->pll11k) {
51 struct clk *pp = clk_get_parent(p);
52
53 if (clk_is_match(pp, rpmsg->pll8k) ||
54 clk_is_match(pp, rpmsg->pll11k)) {
55 pll = pp;
56 break;
57 }
58 p = pp;
59 }
60
61 /* Switch to another pll parent if needed. */
62 if (pll) {
63 npll = (do_div(rate, 8000) ? rpmsg->pll11k : rpmsg->pll8k);
64 if (!clk_is_match(pll, npll)) {
65 ret = clk_set_parent(p, npll);
66 if (ret < 0)
67 dev_warn(dai->dev, "failed to set parent %s: %d\n",
68 __clk_get_name(npll), ret);
69 }
70 }
71
72 if (!(rpmsg->mclk_streams & BIT(substream->stream))) {
73 ret = clk_prepare_enable(rpmsg->mclk);
74 if (ret) {
75 dev_err(dai->dev, "failed to enable mclk: %d\n", ret);
76 return ret;
77 }
78
79 rpmsg->mclk_streams |= BIT(substream->stream);
80 }
81
82 return ret;
83 }
84
fsl_rpmsg_hw_free(struct snd_pcm_substream * substream,struct snd_soc_dai * dai)85 static int fsl_rpmsg_hw_free(struct snd_pcm_substream *substream,
86 struct snd_soc_dai *dai)
87 {
88 struct fsl_rpmsg *rpmsg = snd_soc_dai_get_drvdata(dai);
89
90 if (rpmsg->mclk_streams & BIT(substream->stream)) {
91 clk_disable_unprepare(rpmsg->mclk);
92 rpmsg->mclk_streams &= ~BIT(substream->stream);
93 }
94
95 return 0;
96 }
97
fsl_rpmsg_startup(struct snd_pcm_substream * substream,struct snd_soc_dai * cpu_dai)98 static int fsl_rpmsg_startup(struct snd_pcm_substream *substream,
99 struct snd_soc_dai *cpu_dai)
100 {
101 int ret;
102
103 ret = snd_pcm_hw_constraint_list(substream->runtime, 0,
104 SNDRV_PCM_HW_PARAM_RATE,
105 &fsl_rpmsg_rate_constraints);
106
107 return ret;
108 }
109
110 static const struct snd_soc_dai_ops fsl_rpmsg_dai_ops = {
111 .startup = fsl_rpmsg_startup,
112 .hw_params = fsl_rpmsg_hw_params,
113 .hw_free = fsl_rpmsg_hw_free,
114 };
115
116 static struct snd_soc_dai_driver fsl_rpmsg_dai = {
117 .playback = {
118 .stream_name = "CPU-Playback",
119 .channels_min = 2,
120 .channels_max = 32,
121 .rates = SNDRV_PCM_RATE_KNOT,
122 .formats = FSL_RPMSG_FORMATS,
123 },
124 .capture = {
125 .stream_name = "CPU-Capture",
126 .channels_min = 2,
127 .channels_max = 32,
128 .rates = SNDRV_PCM_RATE_KNOT,
129 .formats = FSL_RPMSG_FORMATS,
130 },
131 .symmetric_rate = 1,
132 .symmetric_channels = 1,
133 .symmetric_sample_bits = 1,
134 .ops = &fsl_rpmsg_dai_ops,
135 };
136
137 static const struct snd_soc_component_driver fsl_component = {
138 .name = "fsl-rpmsg",
139 .legacy_dai_naming = 1,
140 };
141
142 static const struct fsl_rpmsg_soc_data imx7ulp_data = {
143 .rates = SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_16000 |
144 SNDRV_PCM_RATE_48000,
145 .formats = SNDRV_PCM_FMTBIT_S16_LE,
146 };
147
148 static const struct fsl_rpmsg_soc_data imx8mm_data = {
149 .rates = SNDRV_PCM_RATE_KNOT,
150 .formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S24_LE |
151 SNDRV_PCM_FMTBIT_S32_LE | SNDRV_PCM_FMTBIT_DSD_U8 |
152 SNDRV_PCM_FMTBIT_DSD_U16_LE | SNDRV_PCM_FMTBIT_DSD_U32_LE,
153 };
154
155 static const struct fsl_rpmsg_soc_data imx8mn_data = {
156 .rates = SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 |
157 SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_88200 |
158 SNDRV_PCM_RATE_96000 | SNDRV_PCM_RATE_176400 |
159 SNDRV_PCM_RATE_192000,
160 .formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S24_LE |
161 SNDRV_PCM_FMTBIT_S32_LE,
162 };
163
164 static const struct fsl_rpmsg_soc_data imx8mp_data = {
165 .rates = SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 |
166 SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_88200 |
167 SNDRV_PCM_RATE_96000 | SNDRV_PCM_RATE_176400 |
168 SNDRV_PCM_RATE_192000,
169 .formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S24_LE |
170 SNDRV_PCM_FMTBIT_S32_LE,
171 };
172
173 static const struct fsl_rpmsg_soc_data imx93_data = {
174 .rates = SNDRV_PCM_RATE_16000 | SNDRV_PCM_RATE_32000 |
175 SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_96000,
176 .formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S24_LE |
177 SNDRV_PCM_FMTBIT_S32_LE,
178 };
179
180 static const struct of_device_id fsl_rpmsg_ids[] = {
181 { .compatible = "fsl,imx7ulp-rpmsg-audio", .data = &imx7ulp_data},
182 { .compatible = "fsl,imx8mm-rpmsg-audio", .data = &imx8mm_data},
183 { .compatible = "fsl,imx8mn-rpmsg-audio", .data = &imx8mn_data},
184 { .compatible = "fsl,imx8mp-rpmsg-audio", .data = &imx8mp_data},
185 { .compatible = "fsl,imx8ulp-rpmsg-audio", .data = &imx7ulp_data},
186 { .compatible = "fsl,imx93-rpmsg-audio", .data = &imx93_data},
187 { /* sentinel */ }
188 };
189 MODULE_DEVICE_TABLE(of, fsl_rpmsg_ids);
190
fsl_rpmsg_probe(struct platform_device * pdev)191 static int fsl_rpmsg_probe(struct platform_device *pdev)
192 {
193 struct device_node *np = pdev->dev.of_node;
194 struct fsl_rpmsg *rpmsg;
195 int ret;
196
197 rpmsg = devm_kzalloc(&pdev->dev, sizeof(struct fsl_rpmsg), GFP_KERNEL);
198 if (!rpmsg)
199 return -ENOMEM;
200
201 rpmsg->soc_data = of_device_get_match_data(&pdev->dev);
202
203 fsl_rpmsg_dai.playback.rates = rpmsg->soc_data->rates;
204 fsl_rpmsg_dai.capture.rates = rpmsg->soc_data->rates;
205 fsl_rpmsg_dai.playback.formats = rpmsg->soc_data->formats;
206 fsl_rpmsg_dai.capture.formats = rpmsg->soc_data->formats;
207
208 if (of_property_read_bool(np, "fsl,enable-lpa")) {
209 rpmsg->enable_lpa = 1;
210 rpmsg->buffer_size = LPA_LARGE_BUFFER_SIZE;
211 } else {
212 rpmsg->buffer_size = IMX_DEFAULT_DMABUF_SIZE;
213 }
214
215 /* Get the optional clocks */
216 rpmsg->ipg = devm_clk_get_optional(&pdev->dev, "ipg");
217 if (IS_ERR(rpmsg->ipg))
218 return PTR_ERR(rpmsg->ipg);
219
220 rpmsg->mclk = devm_clk_get_optional(&pdev->dev, "mclk");
221 if (IS_ERR(rpmsg->mclk))
222 return PTR_ERR(rpmsg->mclk);
223
224 rpmsg->dma = devm_clk_get_optional(&pdev->dev, "dma");
225 if (IS_ERR(rpmsg->dma))
226 return PTR_ERR(rpmsg->dma);
227
228 rpmsg->pll8k = devm_clk_get_optional(&pdev->dev, "pll8k");
229 if (IS_ERR(rpmsg->pll8k))
230 return PTR_ERR(rpmsg->pll8k);
231
232 rpmsg->pll11k = devm_clk_get_optional(&pdev->dev, "pll11k");
233 if (IS_ERR(rpmsg->pll11k))
234 return PTR_ERR(rpmsg->pll11k);
235
236 platform_set_drvdata(pdev, rpmsg);
237 pm_runtime_enable(&pdev->dev);
238
239 ret = devm_snd_soc_register_component(&pdev->dev, &fsl_component,
240 &fsl_rpmsg_dai, 1);
241 if (ret)
242 goto err_pm_disable;
243
244 rpmsg->card_pdev = platform_device_register_data(&pdev->dev,
245 "imx-audio-rpmsg",
246 PLATFORM_DEVID_AUTO,
247 NULL,
248 0);
249 if (IS_ERR(rpmsg->card_pdev)) {
250 dev_err(&pdev->dev, "failed to register rpmsg card\n");
251 ret = PTR_ERR(rpmsg->card_pdev);
252 goto err_pm_disable;
253 }
254
255 return 0;
256
257 err_pm_disable:
258 pm_runtime_disable(&pdev->dev);
259 return ret;
260 }
261
fsl_rpmsg_remove(struct platform_device * pdev)262 static void fsl_rpmsg_remove(struct platform_device *pdev)
263 {
264 struct fsl_rpmsg *rpmsg = platform_get_drvdata(pdev);
265
266 pm_runtime_disable(&pdev->dev);
267
268 if (rpmsg->card_pdev)
269 platform_device_unregister(rpmsg->card_pdev);
270 }
271
272 #ifdef CONFIG_PM
fsl_rpmsg_runtime_resume(struct device * dev)273 static int fsl_rpmsg_runtime_resume(struct device *dev)
274 {
275 struct fsl_rpmsg *rpmsg = dev_get_drvdata(dev);
276 int ret;
277
278 ret = clk_prepare_enable(rpmsg->ipg);
279 if (ret) {
280 dev_err(dev, "failed to enable ipg clock: %d\n", ret);
281 goto ipg_err;
282 }
283
284 ret = clk_prepare_enable(rpmsg->dma);
285 if (ret) {
286 dev_err(dev, "Failed to enable dma clock %d\n", ret);
287 goto dma_err;
288 }
289
290 return 0;
291
292 dma_err:
293 clk_disable_unprepare(rpmsg->ipg);
294 ipg_err:
295 return ret;
296 }
297
fsl_rpmsg_runtime_suspend(struct device * dev)298 static int fsl_rpmsg_runtime_suspend(struct device *dev)
299 {
300 struct fsl_rpmsg *rpmsg = dev_get_drvdata(dev);
301
302 clk_disable_unprepare(rpmsg->dma);
303 clk_disable_unprepare(rpmsg->ipg);
304
305 return 0;
306 }
307 #endif
308
309 static const struct dev_pm_ops fsl_rpmsg_pm_ops = {
310 SET_RUNTIME_PM_OPS(fsl_rpmsg_runtime_suspend,
311 fsl_rpmsg_runtime_resume,
312 NULL)
313 };
314
315 static struct platform_driver fsl_rpmsg_driver = {
316 .probe = fsl_rpmsg_probe,
317 .remove_new = fsl_rpmsg_remove,
318 .driver = {
319 .name = "fsl_rpmsg",
320 .pm = &fsl_rpmsg_pm_ops,
321 .of_match_table = fsl_rpmsg_ids,
322 },
323 };
324 module_platform_driver(fsl_rpmsg_driver);
325
326 MODULE_DESCRIPTION("Freescale SoC Audio PRMSG CPU Interface");
327 MODULE_AUTHOR("Shengjiu Wang <shengjiu.wang@nxp.com>");
328 MODULE_ALIAS("platform:fsl_rpmsg");
329 MODULE_LICENSE("GPL");
330