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50211be8 JS |
1 | /* |
2 | * omap-hdmi-audio.c -- OMAP4+ DSS HDMI audio support library | |
3 | * | |
4 | * Copyright (C) 2014 Texas Instruments Incorporated - http://www.ti.com | |
5 | * | |
6 | * Author: Jyri Sarha <jsarha@ti.com> | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or | |
9 | * modify it under the terms of the GNU General Public License | |
10 | * version 2 as published by the Free Software Foundation. | |
11 | * | |
12 | * This program is distributed in the hope that it will be useful, but | |
13 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
15 | * General Public License for more details. | |
16 | * | |
17 | */ | |
18 | ||
19 | #include <linux/kernel.h> | |
20 | #include <linux/module.h> | |
21 | #include <linux/err.h> | |
22 | #include <linux/string.h> | |
23 | #include <linux/platform_device.h> | |
24 | #include <sound/soc.h> | |
25 | #include <sound/pcm_params.h> | |
26 | #include <sound/dmaengine_pcm.h> | |
27 | #include <uapi/sound/asound.h> | |
28 | #include <sound/asoundef.h> | |
29 | #include <sound/omap-pcm.h> | |
30 | #include <sound/omap-hdmi-audio.h> | |
50211be8 JS |
31 | |
32 | #define DRV_NAME "omap-hdmi-audio" | |
33 | ||
34 | struct hdmi_audio_data { | |
35 | struct snd_soc_card *card; | |
36 | ||
37 | const struct omap_hdmi_audio_ops *ops; | |
38 | struct device *dssdev; | |
39 | struct snd_dmaengine_dai_dma_data dma_data; | |
40 | struct omap_dss_audio dss_audio; | |
41 | struct snd_aes_iec958 iec; | |
42 | struct snd_cea_861_aud_if cea; | |
43 | ||
44 | struct mutex current_stream_lock; | |
45 | struct snd_pcm_substream *current_stream; | |
46 | }; | |
47 | ||
48 | static | |
49 | struct hdmi_audio_data *card_drvdata_substream(struct snd_pcm_substream *ss) | |
50 | { | |
51 | struct snd_soc_pcm_runtime *rtd = ss->private_data; | |
52 | ||
53 | return snd_soc_card_get_drvdata(rtd->card); | |
54 | } | |
55 | ||
56 | static void hdmi_dai_abort(struct device *dev) | |
57 | { | |
58 | struct hdmi_audio_data *ad = dev_get_drvdata(dev); | |
59 | ||
60 | mutex_lock(&ad->current_stream_lock); | |
61 | if (ad->current_stream && ad->current_stream->runtime && | |
62 | snd_pcm_running(ad->current_stream)) { | |
63 | dev_err(dev, "HDMI display disabled, aborting playback\n"); | |
64 | snd_pcm_stream_lock_irq(ad->current_stream); | |
65 | snd_pcm_stop(ad->current_stream, SNDRV_PCM_STATE_DISCONNECTED); | |
66 | snd_pcm_stream_unlock_irq(ad->current_stream); | |
67 | } | |
68 | mutex_unlock(&ad->current_stream_lock); | |
69 | } | |
70 | ||
71 | static int hdmi_dai_startup(struct snd_pcm_substream *substream, | |
72 | struct snd_soc_dai *dai) | |
73 | { | |
74 | struct hdmi_audio_data *ad = card_drvdata_substream(substream); | |
75 | int ret; | |
76 | /* | |
77 | * Make sure that the period bytes are multiple of the DMA packet size. | |
78 | * Largest packet size we use is 32 32-bit words = 128 bytes | |
79 | */ | |
80 | ret = snd_pcm_hw_constraint_step(substream->runtime, 0, | |
81 | SNDRV_PCM_HW_PARAM_PERIOD_BYTES, 128); | |
82 | if (ret < 0) { | |
7d40acc3 JS |
83 | dev_err(dai->dev, "Could not apply period constraint: %d\n", |
84 | ret); | |
85 | return ret; | |
86 | } | |
87 | ret = snd_pcm_hw_constraint_step(substream->runtime, 0, | |
88 | SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 128); | |
89 | if (ret < 0) { | |
90 | dev_err(dai->dev, "Could not apply buffer constraint: %d\n", | |
91 | ret); | |
50211be8 JS |
92 | return ret; |
93 | } | |
94 | ||
95 | snd_soc_dai_set_dma_data(dai, substream, &ad->dma_data); | |
96 | ||
97 | mutex_lock(&ad->current_stream_lock); | |
98 | ad->current_stream = substream; | |
99 | mutex_unlock(&ad->current_stream_lock); | |
100 | ||
101 | ret = ad->ops->audio_startup(ad->dssdev, hdmi_dai_abort); | |
102 | ||
103 | if (ret) { | |
104 | mutex_lock(&ad->current_stream_lock); | |
105 | ad->current_stream = NULL; | |
106 | mutex_unlock(&ad->current_stream_lock); | |
107 | } | |
108 | ||
109 | return ret; | |
110 | } | |
111 | ||
112 | static int hdmi_dai_hw_params(struct snd_pcm_substream *substream, | |
113 | struct snd_pcm_hw_params *params, | |
114 | struct snd_soc_dai *dai) | |
115 | { | |
116 | struct hdmi_audio_data *ad = card_drvdata_substream(substream); | |
117 | struct snd_aes_iec958 *iec = &ad->iec; | |
118 | struct snd_cea_861_aud_if *cea = &ad->cea; | |
119 | ||
120 | WARN_ON(ad->current_stream != substream); | |
121 | ||
122 | switch (params_format(params)) { | |
123 | case SNDRV_PCM_FORMAT_S16_LE: | |
124 | ad->dma_data.maxburst = 16; | |
125 | break; | |
126 | case SNDRV_PCM_FORMAT_S24_LE: | |
127 | ad->dma_data.maxburst = 32; | |
128 | break; | |
129 | default: | |
130 | dev_err(dai->dev, "format not supported!\n"); | |
131 | return -EINVAL; | |
132 | } | |
133 | ||
134 | ad->dss_audio.iec = iec; | |
135 | ad->dss_audio.cea = cea; | |
136 | /* | |
137 | * fill the IEC-60958 channel status word | |
138 | */ | |
139 | /* initialize the word bytes */ | |
140 | memset(iec->status, 0, sizeof(iec->status)); | |
141 | ||
142 | /* specify IEC-60958-3 (commercial use) */ | |
143 | iec->status[0] &= ~IEC958_AES0_PROFESSIONAL; | |
144 | ||
145 | /* specify that the audio is LPCM*/ | |
146 | iec->status[0] &= ~IEC958_AES0_NONAUDIO; | |
147 | ||
148 | iec->status[0] |= IEC958_AES0_CON_NOT_COPYRIGHT; | |
149 | ||
150 | iec->status[0] |= IEC958_AES0_CON_EMPHASIS_NONE; | |
151 | ||
50211be8 JS |
152 | iec->status[1] = IEC958_AES1_CON_GENERAL; |
153 | ||
154 | iec->status[2] |= IEC958_AES2_CON_SOURCE_UNSPEC; | |
155 | ||
156 | iec->status[2] |= IEC958_AES2_CON_CHANNEL_UNSPEC; | |
157 | ||
158 | switch (params_rate(params)) { | |
159 | case 32000: | |
160 | iec->status[3] |= IEC958_AES3_CON_FS_32000; | |
161 | break; | |
162 | case 44100: | |
163 | iec->status[3] |= IEC958_AES3_CON_FS_44100; | |
164 | break; | |
165 | case 48000: | |
166 | iec->status[3] |= IEC958_AES3_CON_FS_48000; | |
167 | break; | |
168 | case 88200: | |
169 | iec->status[3] |= IEC958_AES3_CON_FS_88200; | |
170 | break; | |
171 | case 96000: | |
172 | iec->status[3] |= IEC958_AES3_CON_FS_96000; | |
173 | break; | |
174 | case 176400: | |
175 | iec->status[3] |= IEC958_AES3_CON_FS_176400; | |
176 | break; | |
177 | case 192000: | |
178 | iec->status[3] |= IEC958_AES3_CON_FS_192000; | |
179 | break; | |
180 | default: | |
181 | dev_err(dai->dev, "rate not supported!\n"); | |
182 | return -EINVAL; | |
183 | } | |
184 | ||
185 | /* specify the clock accuracy */ | |
186 | iec->status[3] |= IEC958_AES3_CON_CLOCK_1000PPM; | |
187 | ||
188 | /* | |
189 | * specify the word length. The same word length value can mean | |
190 | * two different lengths. Hence, we need to specify the maximum | |
191 | * word length as well. | |
192 | */ | |
193 | switch (params_format(params)) { | |
194 | case SNDRV_PCM_FORMAT_S16_LE: | |
195 | iec->status[4] |= IEC958_AES4_CON_WORDLEN_20_16; | |
196 | iec->status[4] &= ~IEC958_AES4_CON_MAX_WORDLEN_24; | |
197 | break; | |
198 | case SNDRV_PCM_FORMAT_S24_LE: | |
199 | iec->status[4] |= IEC958_AES4_CON_WORDLEN_24_20; | |
200 | iec->status[4] |= IEC958_AES4_CON_MAX_WORDLEN_24; | |
201 | break; | |
202 | default: | |
203 | dev_err(dai->dev, "format not supported!\n"); | |
204 | return -EINVAL; | |
205 | } | |
206 | ||
207 | /* | |
208 | * Fill the CEA-861 audio infoframe (see spec for details) | |
209 | */ | |
210 | ||
211 | cea->db1_ct_cc = (params_channels(params) - 1) | |
212 | & CEA861_AUDIO_INFOFRAME_DB1CC; | |
213 | cea->db1_ct_cc |= CEA861_AUDIO_INFOFRAME_DB1CT_FROM_STREAM; | |
214 | ||
215 | cea->db2_sf_ss = CEA861_AUDIO_INFOFRAME_DB2SF_FROM_STREAM; | |
216 | cea->db2_sf_ss |= CEA861_AUDIO_INFOFRAME_DB2SS_FROM_STREAM; | |
217 | ||
218 | cea->db3 = 0; /* not used, all zeros */ | |
219 | ||
50211be8 JS |
220 | if (params_channels(params) == 2) |
221 | cea->db4_ca = 0x0; | |
88359b99 MLC |
222 | else if (params_channels(params) == 6) |
223 | cea->db4_ca = 0xb; | |
50211be8 JS |
224 | else |
225 | cea->db4_ca = 0x13; | |
226 | ||
51603478 MLC |
227 | if (cea->db4_ca == 0x00) |
228 | cea->db5_dminh_lsv = CEA861_AUDIO_INFOFRAME_DB5_DM_INH_PERMITTED; | |
229 | else | |
230 | cea->db5_dminh_lsv = CEA861_AUDIO_INFOFRAME_DB5_DM_INH_PROHIBITED; | |
231 | ||
50211be8 JS |
232 | /* the expression is trivial but makes clear what we are doing */ |
233 | cea->db5_dminh_lsv |= (0 & CEA861_AUDIO_INFOFRAME_DB5_LSV); | |
234 | ||
235 | return ad->ops->audio_config(ad->dssdev, &ad->dss_audio); | |
236 | } | |
237 | ||
238 | static int hdmi_dai_trigger(struct snd_pcm_substream *substream, int cmd, | |
239 | struct snd_soc_dai *dai) | |
240 | { | |
241 | struct hdmi_audio_data *ad = card_drvdata_substream(substream); | |
242 | int err = 0; | |
243 | ||
244 | WARN_ON(ad->current_stream != substream); | |
245 | ||
246 | switch (cmd) { | |
247 | case SNDRV_PCM_TRIGGER_START: | |
248 | case SNDRV_PCM_TRIGGER_RESUME: | |
249 | case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: | |
250 | err = ad->ops->audio_start(ad->dssdev); | |
251 | break; | |
252 | case SNDRV_PCM_TRIGGER_STOP: | |
253 | case SNDRV_PCM_TRIGGER_SUSPEND: | |
254 | case SNDRV_PCM_TRIGGER_PAUSE_PUSH: | |
255 | ad->ops->audio_stop(ad->dssdev); | |
256 | break; | |
257 | default: | |
258 | err = -EINVAL; | |
259 | } | |
260 | return err; | |
261 | } | |
262 | ||
263 | static void hdmi_dai_shutdown(struct snd_pcm_substream *substream, | |
264 | struct snd_soc_dai *dai) | |
265 | { | |
266 | struct hdmi_audio_data *ad = card_drvdata_substream(substream); | |
267 | ||
268 | WARN_ON(ad->current_stream != substream); | |
269 | ||
270 | ad->ops->audio_shutdown(ad->dssdev); | |
271 | ||
272 | mutex_lock(&ad->current_stream_lock); | |
273 | ad->current_stream = NULL; | |
274 | mutex_unlock(&ad->current_stream_lock); | |
275 | } | |
276 | ||
277 | static const struct snd_soc_dai_ops hdmi_dai_ops = { | |
278 | .startup = hdmi_dai_startup, | |
279 | .hw_params = hdmi_dai_hw_params, | |
280 | .trigger = hdmi_dai_trigger, | |
281 | .shutdown = hdmi_dai_shutdown, | |
282 | }; | |
283 | ||
284 | static const struct snd_soc_component_driver omap_hdmi_component = { | |
285 | .name = "omapdss_hdmi", | |
286 | }; | |
287 | ||
288 | static struct snd_soc_dai_driver omap5_hdmi_dai = { | |
289 | .name = "omap5-hdmi-dai", | |
290 | .playback = { | |
291 | .channels_min = 2, | |
292 | .channels_max = 8, | |
293 | .rates = (SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 | | |
294 | SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_88200 | | |
295 | SNDRV_PCM_RATE_96000 | SNDRV_PCM_RATE_176400 | | |
296 | SNDRV_PCM_RATE_192000), | |
297 | .formats = SNDRV_PCM_FMTBIT_S16_LE, | |
298 | }, | |
299 | .ops = &hdmi_dai_ops, | |
300 | }; | |
301 | ||
302 | static struct snd_soc_dai_driver omap4_hdmi_dai = { | |
303 | .name = "omap4-hdmi-dai", | |
304 | .playback = { | |
305 | .channels_min = 2, | |
306 | .channels_max = 8, | |
307 | .rates = (SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 | | |
308 | SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_88200 | | |
309 | SNDRV_PCM_RATE_96000 | SNDRV_PCM_RATE_176400 | | |
310 | SNDRV_PCM_RATE_192000), | |
311 | .formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S24_LE, | |
312 | }, | |
313 | .ops = &hdmi_dai_ops, | |
314 | }; | |
315 | ||
316 | static int omap_hdmi_audio_probe(struct platform_device *pdev) | |
317 | { | |
318 | struct omap_hdmi_audio_pdata *ha = pdev->dev.platform_data; | |
319 | struct device *dev = &pdev->dev; | |
320 | struct hdmi_audio_data *ad; | |
321 | struct snd_soc_dai_driver *dai_drv; | |
322 | struct snd_soc_card *card; | |
323 | int ret; | |
324 | ||
325 | if (!ha) { | |
326 | dev_err(dev, "No platform data\n"); | |
327 | return -EINVAL; | |
328 | } | |
329 | ||
330 | ad = devm_kzalloc(dev, sizeof(*ad), GFP_KERNEL); | |
331 | if (!ad) | |
332 | return -ENOMEM; | |
333 | ad->dssdev = ha->dev; | |
334 | ad->ops = ha->ops; | |
335 | ad->dma_data.addr = ha->audio_dma_addr; | |
336 | ad->dma_data.filter_data = "audio_tx"; | |
337 | ad->dma_data.addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES; | |
338 | mutex_init(&ad->current_stream_lock); | |
339 | ||
340 | switch (ha->dss_version) { | |
341 | case OMAPDSS_VER_OMAP4430_ES1: | |
342 | case OMAPDSS_VER_OMAP4430_ES2: | |
343 | case OMAPDSS_VER_OMAP4: | |
344 | dai_drv = &omap4_hdmi_dai; | |
345 | break; | |
346 | case OMAPDSS_VER_OMAP5: | |
e04fadaa | 347 | case OMAPDSS_VER_DRA7xx: |
50211be8 JS |
348 | dai_drv = &omap5_hdmi_dai; |
349 | break; | |
350 | default: | |
351 | return -EINVAL; | |
352 | } | |
353 | ret = snd_soc_register_component(ad->dssdev, &omap_hdmi_component, | |
354 | dai_drv, 1); | |
355 | if (ret) | |
356 | return ret; | |
357 | ||
358 | ret = omap_pcm_platform_register(ad->dssdev); | |
359 | if (ret) | |
360 | return ret; | |
361 | ||
362 | card = devm_kzalloc(dev, sizeof(*card), GFP_KERNEL); | |
fb5ab729 KP |
363 | if (!card) |
364 | return -ENOMEM; | |
365 | ||
50211be8 JS |
366 | card->name = devm_kasprintf(dev, GFP_KERNEL, |
367 | "HDMI %s", dev_name(ad->dssdev)); | |
368 | card->owner = THIS_MODULE; | |
369 | card->dai_link = | |
370 | devm_kzalloc(dev, sizeof(*(card->dai_link)), GFP_KERNEL); | |
18c94a04 JL |
371 | if (!card->dai_link) |
372 | return -ENOMEM; | |
50211be8 JS |
373 | card->dai_link->name = card->name; |
374 | card->dai_link->stream_name = card->name; | |
375 | card->dai_link->cpu_dai_name = dev_name(ad->dssdev); | |
376 | card->dai_link->platform_name = dev_name(ad->dssdev); | |
377 | card->dai_link->codec_name = "snd-soc-dummy"; | |
378 | card->dai_link->codec_dai_name = "snd-soc-dummy-dai"; | |
379 | card->num_links = 1; | |
380 | card->dev = dev; | |
381 | ||
382 | ret = snd_soc_register_card(card); | |
383 | if (ret) { | |
384 | dev_err(dev, "snd_soc_register_card failed (%d)\n", ret); | |
385 | snd_soc_unregister_component(ad->dssdev); | |
386 | return ret; | |
387 | } | |
388 | ||
389 | ad->card = card; | |
390 | snd_soc_card_set_drvdata(card, ad); | |
391 | ||
392 | dev_set_drvdata(dev, ad); | |
393 | ||
394 | return 0; | |
395 | } | |
396 | ||
397 | static int omap_hdmi_audio_remove(struct platform_device *pdev) | |
398 | { | |
399 | struct hdmi_audio_data *ad = platform_get_drvdata(pdev); | |
400 | ||
401 | snd_soc_unregister_card(ad->card); | |
402 | snd_soc_unregister_component(ad->dssdev); | |
403 | return 0; | |
404 | } | |
405 | ||
406 | static struct platform_driver hdmi_audio_driver = { | |
407 | .driver = { | |
408 | .name = DRV_NAME, | |
50211be8 JS |
409 | }, |
410 | .probe = omap_hdmi_audio_probe, | |
411 | .remove = omap_hdmi_audio_remove, | |
412 | }; | |
413 | ||
414 | module_platform_driver(hdmi_audio_driver); | |
415 | ||
416 | MODULE_AUTHOR("Jyri Sarha <jsarha@ti.com>"); | |
417 | MODULE_DESCRIPTION("OMAP HDMI Audio Driver"); | |
418 | MODULE_LICENSE("GPL"); | |
419 | MODULE_ALIAS("platform:" DRV_NAME); |