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 | |
28 | static 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 | |
34 | static 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 | |
39 | static 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 | |
84 | static 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 | |
97 | static 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 | |
109 | static 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 | |
115 | static 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 | |
136 | static const struct snd_soc_component_driver fsl_component = { |
137 | .name = "fsl-rpmsg" , |
138 | .legacy_dai_naming = 1, |
139 | }; |
140 | |
141 | static 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 | |
147 | static 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 | |
154 | static 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 | |
163 | static 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 | |
172 | static 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 | |
179 | static 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 | }; |
188 | MODULE_DEVICE_TABLE(of, fsl_rpmsg_ids); |
189 | |
190 | static 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 | |
256 | err_pm_disable: |
257 | pm_runtime_disable(dev: &pdev->dev); |
258 | return ret; |
259 | } |
260 | |
261 | static 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 |
272 | static 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 | |
291 | dma_err: |
292 | clk_disable_unprepare(clk: rpmsg->ipg); |
293 | ipg_err: |
294 | return ret; |
295 | } |
296 | |
297 | static 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 | |
308 | static 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 | |
314 | static 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 | }; |
323 | module_platform_driver(fsl_rpmsg_driver); |
324 | |
325 | MODULE_DESCRIPTION("Freescale SoC Audio PRMSG CPU Interface" ); |
326 | MODULE_AUTHOR("Shengjiu Wang <shengjiu.wang@nxp.com>" ); |
327 | MODULE_ALIAS("platform:fsl_rpmsg" ); |
328 | MODULE_LICENSE("GPL" ); |
329 | |