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1802d0be | 1 | // SPDX-License-Identifier: GPL-2.0-only |
50211be8 JS |
2 | /* |
3 | * omap-hdmi-audio.c -- OMAP4+ DSS HDMI audio support library | |
4 | * | |
5 | * Copyright (C) 2014 Texas Instruments Incorporated - http://www.ti.com | |
6 | * | |
7 | * Author: Jyri Sarha <jsarha@ti.com> | |
50211be8 JS |
8 | */ |
9 | ||
10 | #include <linux/kernel.h> | |
11 | #include <linux/module.h> | |
12 | #include <linux/err.h> | |
13 | #include <linux/string.h> | |
14 | #include <linux/platform_device.h> | |
15 | #include <sound/soc.h> | |
16 | #include <sound/pcm_params.h> | |
17 | #include <sound/dmaengine_pcm.h> | |
18 | #include <uapi/sound/asound.h> | |
19 | #include <sound/asoundef.h> | |
50211be8 | 20 | #include <sound/omap-hdmi-audio.h> |
50211be8 | 21 | |
b1a549c6 PU |
22 | #include "sdma-pcm.h" |
23 | ||
50211be8 JS |
24 | #define DRV_NAME "omap-hdmi-audio" |
25 | ||
26 | struct hdmi_audio_data { | |
27 | struct snd_soc_card *card; | |
28 | ||
29 | const struct omap_hdmi_audio_ops *ops; | |
30 | struct device *dssdev; | |
31 | struct snd_dmaengine_dai_dma_data dma_data; | |
32 | struct omap_dss_audio dss_audio; | |
33 | struct snd_aes_iec958 iec; | |
34 | struct snd_cea_861_aud_if cea; | |
35 | ||
36 | struct mutex current_stream_lock; | |
37 | struct snd_pcm_substream *current_stream; | |
38 | }; | |
39 | ||
40 | static | |
41 | struct hdmi_audio_data *card_drvdata_substream(struct snd_pcm_substream *ss) | |
42 | { | |
43 | struct snd_soc_pcm_runtime *rtd = ss->private_data; | |
44 | ||
45 | return snd_soc_card_get_drvdata(rtd->card); | |
46 | } | |
47 | ||
48 | static void hdmi_dai_abort(struct device *dev) | |
49 | { | |
50 | struct hdmi_audio_data *ad = dev_get_drvdata(dev); | |
51 | ||
52 | mutex_lock(&ad->current_stream_lock); | |
53 | if (ad->current_stream && ad->current_stream->runtime && | |
54 | snd_pcm_running(ad->current_stream)) { | |
55 | dev_err(dev, "HDMI display disabled, aborting playback\n"); | |
56 | snd_pcm_stream_lock_irq(ad->current_stream); | |
57 | snd_pcm_stop(ad->current_stream, SNDRV_PCM_STATE_DISCONNECTED); | |
58 | snd_pcm_stream_unlock_irq(ad->current_stream); | |
59 | } | |
60 | mutex_unlock(&ad->current_stream_lock); | |
61 | } | |
62 | ||
63 | static int hdmi_dai_startup(struct snd_pcm_substream *substream, | |
64 | struct snd_soc_dai *dai) | |
65 | { | |
66 | struct hdmi_audio_data *ad = card_drvdata_substream(substream); | |
67 | int ret; | |
68 | /* | |
69 | * Make sure that the period bytes are multiple of the DMA packet size. | |
70 | * Largest packet size we use is 32 32-bit words = 128 bytes | |
71 | */ | |
72 | ret = snd_pcm_hw_constraint_step(substream->runtime, 0, | |
73 | SNDRV_PCM_HW_PARAM_PERIOD_BYTES, 128); | |
74 | if (ret < 0) { | |
7d40acc3 JS |
75 | dev_err(dai->dev, "Could not apply period constraint: %d\n", |
76 | ret); | |
77 | return ret; | |
78 | } | |
79 | ret = snd_pcm_hw_constraint_step(substream->runtime, 0, | |
80 | SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 128); | |
81 | if (ret < 0) { | |
82 | dev_err(dai->dev, "Could not apply buffer constraint: %d\n", | |
83 | ret); | |
50211be8 JS |
84 | return ret; |
85 | } | |
86 | ||
87 | snd_soc_dai_set_dma_data(dai, substream, &ad->dma_data); | |
88 | ||
89 | mutex_lock(&ad->current_stream_lock); | |
90 | ad->current_stream = substream; | |
91 | mutex_unlock(&ad->current_stream_lock); | |
92 | ||
93 | ret = ad->ops->audio_startup(ad->dssdev, hdmi_dai_abort); | |
94 | ||
95 | if (ret) { | |
96 | mutex_lock(&ad->current_stream_lock); | |
97 | ad->current_stream = NULL; | |
98 | mutex_unlock(&ad->current_stream_lock); | |
99 | } | |
100 | ||
101 | return ret; | |
102 | } | |
103 | ||
104 | static int hdmi_dai_hw_params(struct snd_pcm_substream *substream, | |
105 | struct snd_pcm_hw_params *params, | |
106 | struct snd_soc_dai *dai) | |
107 | { | |
108 | struct hdmi_audio_data *ad = card_drvdata_substream(substream); | |
109 | struct snd_aes_iec958 *iec = &ad->iec; | |
110 | struct snd_cea_861_aud_if *cea = &ad->cea; | |
111 | ||
112 | WARN_ON(ad->current_stream != substream); | |
113 | ||
114 | switch (params_format(params)) { | |
115 | case SNDRV_PCM_FORMAT_S16_LE: | |
116 | ad->dma_data.maxburst = 16; | |
117 | break; | |
118 | case SNDRV_PCM_FORMAT_S24_LE: | |
119 | ad->dma_data.maxburst = 32; | |
120 | break; | |
121 | default: | |
122 | dev_err(dai->dev, "format not supported!\n"); | |
123 | return -EINVAL; | |
124 | } | |
125 | ||
126 | ad->dss_audio.iec = iec; | |
127 | ad->dss_audio.cea = cea; | |
128 | /* | |
129 | * fill the IEC-60958 channel status word | |
130 | */ | |
131 | /* initialize the word bytes */ | |
132 | memset(iec->status, 0, sizeof(iec->status)); | |
133 | ||
134 | /* specify IEC-60958-3 (commercial use) */ | |
135 | iec->status[0] &= ~IEC958_AES0_PROFESSIONAL; | |
136 | ||
137 | /* specify that the audio is LPCM*/ | |
138 | iec->status[0] &= ~IEC958_AES0_NONAUDIO; | |
139 | ||
140 | iec->status[0] |= IEC958_AES0_CON_NOT_COPYRIGHT; | |
141 | ||
142 | iec->status[0] |= IEC958_AES0_CON_EMPHASIS_NONE; | |
143 | ||
50211be8 JS |
144 | iec->status[1] = IEC958_AES1_CON_GENERAL; |
145 | ||
146 | iec->status[2] |= IEC958_AES2_CON_SOURCE_UNSPEC; | |
147 | ||
148 | iec->status[2] |= IEC958_AES2_CON_CHANNEL_UNSPEC; | |
149 | ||
150 | switch (params_rate(params)) { | |
151 | case 32000: | |
152 | iec->status[3] |= IEC958_AES3_CON_FS_32000; | |
153 | break; | |
154 | case 44100: | |
155 | iec->status[3] |= IEC958_AES3_CON_FS_44100; | |
156 | break; | |
157 | case 48000: | |
158 | iec->status[3] |= IEC958_AES3_CON_FS_48000; | |
159 | break; | |
160 | case 88200: | |
161 | iec->status[3] |= IEC958_AES3_CON_FS_88200; | |
162 | break; | |
163 | case 96000: | |
164 | iec->status[3] |= IEC958_AES3_CON_FS_96000; | |
165 | break; | |
166 | case 176400: | |
167 | iec->status[3] |= IEC958_AES3_CON_FS_176400; | |
168 | break; | |
169 | case 192000: | |
170 | iec->status[3] |= IEC958_AES3_CON_FS_192000; | |
171 | break; | |
172 | default: | |
173 | dev_err(dai->dev, "rate not supported!\n"); | |
174 | return -EINVAL; | |
175 | } | |
176 | ||
177 | /* specify the clock accuracy */ | |
178 | iec->status[3] |= IEC958_AES3_CON_CLOCK_1000PPM; | |
179 | ||
180 | /* | |
181 | * specify the word length. The same word length value can mean | |
182 | * two different lengths. Hence, we need to specify the maximum | |
183 | * word length as well. | |
184 | */ | |
185 | switch (params_format(params)) { | |
186 | case SNDRV_PCM_FORMAT_S16_LE: | |
187 | iec->status[4] |= IEC958_AES4_CON_WORDLEN_20_16; | |
188 | iec->status[4] &= ~IEC958_AES4_CON_MAX_WORDLEN_24; | |
189 | break; | |
190 | case SNDRV_PCM_FORMAT_S24_LE: | |
191 | iec->status[4] |= IEC958_AES4_CON_WORDLEN_24_20; | |
192 | iec->status[4] |= IEC958_AES4_CON_MAX_WORDLEN_24; | |
193 | break; | |
194 | default: | |
195 | dev_err(dai->dev, "format not supported!\n"); | |
196 | return -EINVAL; | |
197 | } | |
198 | ||
199 | /* | |
200 | * Fill the CEA-861 audio infoframe (see spec for details) | |
201 | */ | |
202 | ||
203 | cea->db1_ct_cc = (params_channels(params) - 1) | |
204 | & CEA861_AUDIO_INFOFRAME_DB1CC; | |
205 | cea->db1_ct_cc |= CEA861_AUDIO_INFOFRAME_DB1CT_FROM_STREAM; | |
206 | ||
207 | cea->db2_sf_ss = CEA861_AUDIO_INFOFRAME_DB2SF_FROM_STREAM; | |
208 | cea->db2_sf_ss |= CEA861_AUDIO_INFOFRAME_DB2SS_FROM_STREAM; | |
209 | ||
210 | cea->db3 = 0; /* not used, all zeros */ | |
211 | ||
50211be8 JS |
212 | if (params_channels(params) == 2) |
213 | cea->db4_ca = 0x0; | |
88359b99 MLC |
214 | else if (params_channels(params) == 6) |
215 | cea->db4_ca = 0xb; | |
50211be8 JS |
216 | else |
217 | cea->db4_ca = 0x13; | |
218 | ||
51603478 MLC |
219 | if (cea->db4_ca == 0x00) |
220 | cea->db5_dminh_lsv = CEA861_AUDIO_INFOFRAME_DB5_DM_INH_PERMITTED; | |
221 | else | |
222 | cea->db5_dminh_lsv = CEA861_AUDIO_INFOFRAME_DB5_DM_INH_PROHIBITED; | |
223 | ||
50211be8 JS |
224 | /* the expression is trivial but makes clear what we are doing */ |
225 | cea->db5_dminh_lsv |= (0 & CEA861_AUDIO_INFOFRAME_DB5_LSV); | |
226 | ||
227 | return ad->ops->audio_config(ad->dssdev, &ad->dss_audio); | |
228 | } | |
229 | ||
230 | static int hdmi_dai_trigger(struct snd_pcm_substream *substream, int cmd, | |
231 | struct snd_soc_dai *dai) | |
232 | { | |
233 | struct hdmi_audio_data *ad = card_drvdata_substream(substream); | |
234 | int err = 0; | |
235 | ||
236 | WARN_ON(ad->current_stream != substream); | |
237 | ||
238 | switch (cmd) { | |
239 | case SNDRV_PCM_TRIGGER_START: | |
240 | case SNDRV_PCM_TRIGGER_RESUME: | |
241 | case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: | |
242 | err = ad->ops->audio_start(ad->dssdev); | |
243 | break; | |
244 | case SNDRV_PCM_TRIGGER_STOP: | |
245 | case SNDRV_PCM_TRIGGER_SUSPEND: | |
246 | case SNDRV_PCM_TRIGGER_PAUSE_PUSH: | |
247 | ad->ops->audio_stop(ad->dssdev); | |
248 | break; | |
249 | default: | |
250 | err = -EINVAL; | |
251 | } | |
252 | return err; | |
253 | } | |
254 | ||
255 | static void hdmi_dai_shutdown(struct snd_pcm_substream *substream, | |
256 | struct snd_soc_dai *dai) | |
257 | { | |
258 | struct hdmi_audio_data *ad = card_drvdata_substream(substream); | |
259 | ||
260 | WARN_ON(ad->current_stream != substream); | |
261 | ||
262 | ad->ops->audio_shutdown(ad->dssdev); | |
263 | ||
264 | mutex_lock(&ad->current_stream_lock); | |
265 | ad->current_stream = NULL; | |
266 | mutex_unlock(&ad->current_stream_lock); | |
267 | } | |
268 | ||
269 | static const struct snd_soc_dai_ops hdmi_dai_ops = { | |
270 | .startup = hdmi_dai_startup, | |
271 | .hw_params = hdmi_dai_hw_params, | |
272 | .trigger = hdmi_dai_trigger, | |
273 | .shutdown = hdmi_dai_shutdown, | |
274 | }; | |
275 | ||
276 | static const struct snd_soc_component_driver omap_hdmi_component = { | |
277 | .name = "omapdss_hdmi", | |
278 | }; | |
279 | ||
280 | static struct snd_soc_dai_driver omap5_hdmi_dai = { | |
281 | .name = "omap5-hdmi-dai", | |
282 | .playback = { | |
283 | .channels_min = 2, | |
284 | .channels_max = 8, | |
285 | .rates = (SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 | | |
286 | SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_88200 | | |
287 | SNDRV_PCM_RATE_96000 | SNDRV_PCM_RATE_176400 | | |
288 | SNDRV_PCM_RATE_192000), | |
289 | .formats = SNDRV_PCM_FMTBIT_S16_LE, | |
290 | }, | |
291 | .ops = &hdmi_dai_ops, | |
292 | }; | |
293 | ||
294 | static struct snd_soc_dai_driver omap4_hdmi_dai = { | |
295 | .name = "omap4-hdmi-dai", | |
296 | .playback = { | |
297 | .channels_min = 2, | |
298 | .channels_max = 8, | |
299 | .rates = (SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 | | |
300 | SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_88200 | | |
301 | SNDRV_PCM_RATE_96000 | SNDRV_PCM_RATE_176400 | | |
302 | SNDRV_PCM_RATE_192000), | |
303 | .formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S24_LE, | |
304 | }, | |
305 | .ops = &hdmi_dai_ops, | |
306 | }; | |
307 | ||
308 | static int omap_hdmi_audio_probe(struct platform_device *pdev) | |
309 | { | |
310 | struct omap_hdmi_audio_pdata *ha = pdev->dev.platform_data; | |
311 | struct device *dev = &pdev->dev; | |
312 | struct hdmi_audio_data *ad; | |
313 | struct snd_soc_dai_driver *dai_drv; | |
314 | struct snd_soc_card *card; | |
315 | int ret; | |
316 | ||
317 | if (!ha) { | |
318 | dev_err(dev, "No platform data\n"); | |
319 | return -EINVAL; | |
320 | } | |
321 | ||
322 | ad = devm_kzalloc(dev, sizeof(*ad), GFP_KERNEL); | |
323 | if (!ad) | |
324 | return -ENOMEM; | |
325 | ad->dssdev = ha->dev; | |
326 | ad->ops = ha->ops; | |
327 | ad->dma_data.addr = ha->audio_dma_addr; | |
328 | ad->dma_data.filter_data = "audio_tx"; | |
329 | ad->dma_data.addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES; | |
330 | mutex_init(&ad->current_stream_lock); | |
331 | ||
d20fa5a0 LP |
332 | switch (ha->version) { |
333 | case 4: | |
50211be8 JS |
334 | dai_drv = &omap4_hdmi_dai; |
335 | break; | |
d20fa5a0 | 336 | case 5: |
50211be8 JS |
337 | dai_drv = &omap5_hdmi_dai; |
338 | break; | |
339 | default: | |
340 | return -EINVAL; | |
341 | } | |
642a722d | 342 | ret = devm_snd_soc_register_component(ad->dssdev, &omap_hdmi_component, |
50211be8 JS |
343 | dai_drv, 1); |
344 | if (ret) | |
345 | return ret; | |
346 | ||
b1a549c6 | 347 | ret = sdma_pcm_platform_register(ad->dssdev, "audio_tx", NULL); |
50211be8 JS |
348 | if (ret) |
349 | return ret; | |
350 | ||
351 | card = devm_kzalloc(dev, sizeof(*card), GFP_KERNEL); | |
fb5ab729 KP |
352 | if (!card) |
353 | return -ENOMEM; | |
354 | ||
50211be8 JS |
355 | card->name = devm_kasprintf(dev, GFP_KERNEL, |
356 | "HDMI %s", dev_name(ad->dssdev)); | |
94a6a8e8 AY |
357 | if (!card->name) |
358 | return -ENOMEM; | |
359 | ||
50211be8 JS |
360 | card->owner = THIS_MODULE; |
361 | card->dai_link = | |
362 | devm_kzalloc(dev, sizeof(*(card->dai_link)), GFP_KERNEL); | |
18c94a04 JL |
363 | if (!card->dai_link) |
364 | return -ENOMEM; | |
50211be8 JS |
365 | card->dai_link->name = card->name; |
366 | card->dai_link->stream_name = card->name; | |
367 | card->dai_link->cpu_dai_name = dev_name(ad->dssdev); | |
368 | card->dai_link->platform_name = dev_name(ad->dssdev); | |
369 | card->dai_link->codec_name = "snd-soc-dummy"; | |
370 | card->dai_link->codec_dai_name = "snd-soc-dummy-dai"; | |
371 | card->num_links = 1; | |
372 | card->dev = dev; | |
373 | ||
374 | ret = snd_soc_register_card(card); | |
375 | if (ret) { | |
376 | dev_err(dev, "snd_soc_register_card failed (%d)\n", ret); | |
50211be8 JS |
377 | return ret; |
378 | } | |
379 | ||
380 | ad->card = card; | |
381 | snd_soc_card_set_drvdata(card, ad); | |
382 | ||
383 | dev_set_drvdata(dev, ad); | |
384 | ||
385 | return 0; | |
386 | } | |
387 | ||
388 | static int omap_hdmi_audio_remove(struct platform_device *pdev) | |
389 | { | |
390 | struct hdmi_audio_data *ad = platform_get_drvdata(pdev); | |
391 | ||
392 | snd_soc_unregister_card(ad->card); | |
50211be8 JS |
393 | return 0; |
394 | } | |
395 | ||
396 | static struct platform_driver hdmi_audio_driver = { | |
397 | .driver = { | |
398 | .name = DRV_NAME, | |
50211be8 JS |
399 | }, |
400 | .probe = omap_hdmi_audio_probe, | |
401 | .remove = omap_hdmi_audio_remove, | |
402 | }; | |
403 | ||
404 | module_platform_driver(hdmi_audio_driver); | |
405 | ||
406 | MODULE_AUTHOR("Jyri Sarha <jsarha@ti.com>"); | |
407 | MODULE_DESCRIPTION("OMAP HDMI Audio Driver"); | |
408 | MODULE_LICENSE("GPL"); | |
409 | MODULE_ALIAS("platform:" DRV_NAME); |