Commit | Line | Data |
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bca2e41d RN |
1 | /* |
2 | * omap-hdmi.c | |
3 | * | |
4 | * OMAP ALSA SoC DAI driver for HDMI audio on OMAP4 processors. | |
5 | * Copyright (C) 2010-2011 Texas Instruments Incorporated - http://www.ti.com/ | |
6 | * Authors: Jorge Candelaria <jorge.candelaria@ti.com> | |
7 | * Ricardo Neri <ricardo.neri@ti.com> | |
8 | * | |
9 | * This program is free software; you can redistribute it and/or | |
10 | * modify it under the terms of the GNU General Public License | |
11 | * version 2 as published by the Free Software Foundation. | |
12 | * | |
13 | * This program is distributed in the hope that it will be useful, but | |
14 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
16 | * General Public License for more details. | |
17 | * | |
18 | * You should have received a copy of the GNU General Public License | |
19 | * along with this program; if not, write to the Free Software | |
20 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA | |
21 | * 02110-1301 USA | |
22 | * | |
23 | */ | |
24 | ||
25 | #include <linux/init.h> | |
26 | #include <linux/module.h> | |
27 | #include <linux/device.h> | |
28 | #include <sound/core.h> | |
29 | #include <sound/pcm.h> | |
30 | #include <sound/pcm_params.h> | |
31 | #include <sound/initval.h> | |
32 | #include <sound/soc.h> | |
7e6aa220 RN |
33 | #include <sound/asound.h> |
34 | #include <sound/asoundef.h> | |
09ae3aaf | 35 | #include <sound/dmaengine_pcm.h> |
a48d9b75 | 36 | #include <video/omapdss.h> |
87c19364 | 37 | #include <sound/omap-pcm.h> |
bca2e41d | 38 | |
bca2e41d RN |
39 | #include "omap-hdmi.h" |
40 | ||
e412ec64 | 41 | #define DRV_NAME "omap-hdmi-audio-dai" |
bca2e41d | 42 | |
26039153 | 43 | struct hdmi_priv { |
09ae3aaf LPC |
44 | struct snd_dmaengine_dai_dma_data dma_data; |
45 | unsigned int dma_req; | |
7e6aa220 RN |
46 | struct omap_dss_audio dss_audio; |
47 | struct snd_aes_iec958 iec; | |
48 | struct snd_cea_861_aud_if cea; | |
a48d9b75 | 49 | struct omap_dss_device *dssdev; |
bca2e41d RN |
50 | }; |
51 | ||
52 | static int omap_hdmi_dai_startup(struct snd_pcm_substream *substream, | |
53 | struct snd_soc_dai *dai) | |
54 | { | |
a0534e3b | 55 | struct hdmi_priv *priv = snd_soc_dai_get_drvdata(dai); |
bca2e41d RN |
56 | int err; |
57 | /* | |
58 | * Make sure that the period bytes are multiple of the DMA packet size. | |
59 | * Largest packet size we use is 32 32-bit words = 128 bytes | |
60 | */ | |
61 | err = snd_pcm_hw_constraint_step(substream->runtime, 0, | |
62 | SNDRV_PCM_HW_PARAM_PERIOD_BYTES, 128); | |
a0534e3b RN |
63 | if (err < 0) { |
64 | dev_err(dai->dev, "could not apply constraint\n"); | |
bca2e41d | 65 | return err; |
a0534e3b | 66 | } |
bca2e41d | 67 | |
a0534e3b RN |
68 | if (!priv->dssdev->driver->audio_supported(priv->dssdev)) { |
69 | dev_err(dai->dev, "audio not supported\n"); | |
70 | return -ENODEV; | |
71 | } | |
bcd6da7b | 72 | |
09ae3aaf | 73 | snd_soc_dai_set_dma_data(dai, substream, &priv->dma_data); |
bcd6da7b | 74 | |
bca2e41d RN |
75 | return 0; |
76 | } | |
77 | ||
a48d9b75 RN |
78 | static int omap_hdmi_dai_prepare(struct snd_pcm_substream *substream, |
79 | struct snd_soc_dai *dai) | |
80 | { | |
81 | struct hdmi_priv *priv = snd_soc_dai_get_drvdata(dai); | |
82 | ||
83 | return priv->dssdev->driver->audio_enable(priv->dssdev); | |
84 | } | |
85 | ||
bca2e41d RN |
86 | static int omap_hdmi_dai_hw_params(struct snd_pcm_substream *substream, |
87 | struct snd_pcm_hw_params *params, | |
88 | struct snd_soc_dai *dai) | |
89 | { | |
26039153 | 90 | struct hdmi_priv *priv = snd_soc_dai_get_drvdata(dai); |
7e6aa220 RN |
91 | struct snd_aes_iec958 *iec = &priv->iec; |
92 | struct snd_cea_861_aud_if *cea = &priv->cea; | |
bca2e41d RN |
93 | int err = 0; |
94 | ||
95 | switch (params_format(params)) { | |
96 | case SNDRV_PCM_FORMAT_S16_LE: | |
09ae3aaf | 97 | priv->dma_data.maxburst = 16; |
bca2e41d RN |
98 | break; |
99 | case SNDRV_PCM_FORMAT_S24_LE: | |
09ae3aaf | 100 | priv->dma_data.maxburst = 32; |
bca2e41d RN |
101 | break; |
102 | default: | |
7e6aa220 RN |
103 | dev_err(dai->dev, "format not supported!\n"); |
104 | return -EINVAL; | |
bca2e41d RN |
105 | } |
106 | ||
7e6aa220 RN |
107 | /* |
108 | * fill the IEC-60958 channel status word | |
109 | */ | |
a88fedfd RN |
110 | /* initialize the word bytes */ |
111 | memset(iec->status, 0, sizeof(iec->status)); | |
7e6aa220 RN |
112 | |
113 | /* specify IEC-60958-3 (commercial use) */ | |
114 | iec->status[0] &= ~IEC958_AES0_PROFESSIONAL; | |
115 | ||
116 | /* specify that the audio is LPCM*/ | |
117 | iec->status[0] &= ~IEC958_AES0_NONAUDIO; | |
118 | ||
119 | iec->status[0] |= IEC958_AES0_CON_NOT_COPYRIGHT; | |
120 | ||
121 | iec->status[0] |= IEC958_AES0_CON_EMPHASIS_NONE; | |
122 | ||
123 | iec->status[0] |= IEC958_AES1_PRO_MODE_NOTID; | |
124 | ||
125 | iec->status[1] = IEC958_AES1_CON_GENERAL; | |
126 | ||
127 | iec->status[2] |= IEC958_AES2_CON_SOURCE_UNSPEC; | |
128 | ||
129 | iec->status[2] |= IEC958_AES2_CON_CHANNEL_UNSPEC; | |
130 | ||
131 | switch (params_rate(params)) { | |
132 | case 32000: | |
133 | iec->status[3] |= IEC958_AES3_CON_FS_32000; | |
134 | break; | |
135 | case 44100: | |
136 | iec->status[3] |= IEC958_AES3_CON_FS_44100; | |
137 | break; | |
138 | case 48000: | |
139 | iec->status[3] |= IEC958_AES3_CON_FS_48000; | |
140 | break; | |
141 | case 88200: | |
142 | iec->status[3] |= IEC958_AES3_CON_FS_88200; | |
143 | break; | |
144 | case 96000: | |
145 | iec->status[3] |= IEC958_AES3_CON_FS_96000; | |
146 | break; | |
147 | case 176400: | |
148 | iec->status[3] |= IEC958_AES3_CON_FS_176400; | |
149 | break; | |
150 | case 192000: | |
151 | iec->status[3] |= IEC958_AES3_CON_FS_192000; | |
152 | break; | |
153 | default: | |
154 | dev_err(dai->dev, "rate not supported!\n"); | |
155 | return -EINVAL; | |
156 | } | |
157 | ||
158 | /* specify the clock accuracy */ | |
159 | iec->status[3] |= IEC958_AES3_CON_CLOCK_1000PPM; | |
160 | ||
161 | /* | |
162 | * specify the word length. The same word length value can mean | |
163 | * two different lengths. Hence, we need to specify the maximum | |
164 | * word length as well. | |
165 | */ | |
166 | switch (params_format(params)) { | |
167 | case SNDRV_PCM_FORMAT_S16_LE: | |
168 | iec->status[4] |= IEC958_AES4_CON_WORDLEN_20_16; | |
169 | iec->status[4] &= ~IEC958_AES4_CON_MAX_WORDLEN_24; | |
170 | break; | |
171 | case SNDRV_PCM_FORMAT_S24_LE: | |
172 | iec->status[4] |= IEC958_AES4_CON_WORDLEN_24_20; | |
173 | iec->status[4] |= IEC958_AES4_CON_MAX_WORDLEN_24; | |
174 | break; | |
175 | default: | |
176 | dev_err(dai->dev, "format not supported!\n"); | |
177 | return -EINVAL; | |
178 | } | |
179 | ||
180 | /* | |
181 | * Fill the CEA-861 audio infoframe (see spec for details) | |
182 | */ | |
183 | ||
184 | cea->db1_ct_cc = (params_channels(params) - 1) | |
185 | & CEA861_AUDIO_INFOFRAME_DB1CC; | |
186 | cea->db1_ct_cc |= CEA861_AUDIO_INFOFRAME_DB1CT_FROM_STREAM; | |
187 | ||
188 | cea->db2_sf_ss = CEA861_AUDIO_INFOFRAME_DB2SF_FROM_STREAM; | |
189 | cea->db2_sf_ss |= CEA861_AUDIO_INFOFRAME_DB2SS_FROM_STREAM; | |
190 | ||
191 | cea->db3 = 0; /* not used, all zeros */ | |
192 | ||
193 | /* | |
194 | * The OMAP HDMI IP requires to use the 8-channel channel code when | |
195 | * transmitting more than two channels. | |
196 | */ | |
197 | if (params_channels(params) == 2) | |
198 | cea->db4_ca = 0x0; | |
199 | else | |
200 | cea->db4_ca = 0x13; | |
201 | ||
202 | cea->db5_dminh_lsv = CEA861_AUDIO_INFOFRAME_DB5_DM_INH_PROHIBITED; | |
203 | /* the expression is trivial but makes clear what we are doing */ | |
204 | cea->db5_dminh_lsv |= (0 & CEA861_AUDIO_INFOFRAME_DB5_LSV); | |
205 | ||
206 | priv->dss_audio.iec = iec; | |
207 | priv->dss_audio.cea = cea; | |
208 | ||
209 | err = priv->dssdev->driver->audio_config(priv->dssdev, | |
210 | &priv->dss_audio); | |
211 | ||
bca2e41d RN |
212 | return err; |
213 | } | |
214 | ||
a48d9b75 RN |
215 | static int omap_hdmi_dai_trigger(struct snd_pcm_substream *substream, int cmd, |
216 | struct snd_soc_dai *dai) | |
217 | { | |
218 | struct hdmi_priv *priv = snd_soc_dai_get_drvdata(dai); | |
219 | int err = 0; | |
220 | ||
221 | switch (cmd) { | |
222 | case SNDRV_PCM_TRIGGER_START: | |
223 | case SNDRV_PCM_TRIGGER_RESUME: | |
224 | case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: | |
225 | err = priv->dssdev->driver->audio_start(priv->dssdev); | |
226 | break; | |
227 | case SNDRV_PCM_TRIGGER_STOP: | |
228 | case SNDRV_PCM_TRIGGER_SUSPEND: | |
229 | case SNDRV_PCM_TRIGGER_PAUSE_PUSH: | |
230 | priv->dssdev->driver->audio_stop(priv->dssdev); | |
231 | break; | |
232 | default: | |
233 | err = -EINVAL; | |
234 | } | |
235 | return err; | |
236 | } | |
237 | ||
238 | static void omap_hdmi_dai_shutdown(struct snd_pcm_substream *substream, | |
239 | struct snd_soc_dai *dai) | |
240 | { | |
241 | struct hdmi_priv *priv = snd_soc_dai_get_drvdata(dai); | |
242 | ||
243 | priv->dssdev->driver->audio_disable(priv->dssdev); | |
244 | } | |
245 | ||
85e7652d | 246 | static const struct snd_soc_dai_ops omap_hdmi_dai_ops = { |
bca2e41d RN |
247 | .startup = omap_hdmi_dai_startup, |
248 | .hw_params = omap_hdmi_dai_hw_params, | |
7e6aa220 RN |
249 | .prepare = omap_hdmi_dai_prepare, |
250 | .trigger = omap_hdmi_dai_trigger, | |
251 | .shutdown = omap_hdmi_dai_shutdown, | |
bca2e41d RN |
252 | }; |
253 | ||
254 | static struct snd_soc_dai_driver omap_hdmi_dai = { | |
255 | .playback = { | |
256 | .channels_min = 2, | |
a1ab92da | 257 | .channels_max = 8, |
bca2e41d RN |
258 | .rates = OMAP_HDMI_RATES, |
259 | .formats = OMAP_HDMI_FORMATS, | |
260 | }, | |
261 | .ops = &omap_hdmi_dai_ops, | |
262 | }; | |
263 | ||
0ba7f849 KM |
264 | static const struct snd_soc_component_driver omap_hdmi_component = { |
265 | .name = DRV_NAME, | |
266 | }; | |
267 | ||
7ff60006 | 268 | static int omap_hdmi_probe(struct platform_device *pdev) |
bca2e41d RN |
269 | { |
270 | int ret; | |
271 | struct resource *hdmi_rsrc; | |
26039153 | 272 | struct hdmi_priv *hdmi_data; |
a48d9b75 | 273 | bool hdmi_dev_found = false; |
26039153 RN |
274 | |
275 | hdmi_data = devm_kzalloc(&pdev->dev, sizeof(*hdmi_data), GFP_KERNEL); | |
276 | if (hdmi_data == NULL) { | |
277 | dev_err(&pdev->dev, "Cannot allocate memory for HDMI data\n"); | |
278 | return -ENOMEM; | |
279 | } | |
bca2e41d RN |
280 | |
281 | hdmi_rsrc = platform_get_resource(pdev, IORESOURCE_MEM, 0); | |
282 | if (!hdmi_rsrc) { | |
283 | dev_err(&pdev->dev, "Cannot obtain IORESOURCE_MEM HDMI\n"); | |
0ff5ee87 | 284 | return -ENODEV; |
bca2e41d RN |
285 | } |
286 | ||
09ae3aaf | 287 | hdmi_data->dma_data.addr = hdmi_rsrc->start + OMAP_HDMI_AUDIO_DMA_PORT; |
bca2e41d RN |
288 | |
289 | hdmi_rsrc = platform_get_resource(pdev, IORESOURCE_DMA, 0); | |
290 | if (!hdmi_rsrc) { | |
291 | dev_err(&pdev->dev, "Cannot obtain IORESOURCE_DMA HDMI\n"); | |
0ff5ee87 | 292 | return -ENODEV; |
bca2e41d RN |
293 | } |
294 | ||
09ae3aaf LPC |
295 | hdmi_data->dma_req = hdmi_rsrc->start; |
296 | hdmi_data->dma_data.filter_data = &hdmi_data->dma_req; | |
297 | hdmi_data->dma_data.addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES; | |
bca2e41d | 298 | |
a48d9b75 RN |
299 | /* |
300 | * TODO: We assume that there is only one DSS HDMI device. Future | |
301 | * OMAP implementations may support more than one HDMI devices and | |
302 | * we should provided separate audio support for all of them. | |
303 | */ | |
304 | /* Find an HDMI device. */ | |
305 | for_each_dss_dev(hdmi_data->dssdev) { | |
306 | omap_dss_get_device(hdmi_data->dssdev); | |
307 | ||
308 | if (!hdmi_data->dssdev->driver) { | |
309 | omap_dss_put_device(hdmi_data->dssdev); | |
310 | continue; | |
311 | } | |
312 | ||
313 | if (hdmi_data->dssdev->type == OMAP_DISPLAY_TYPE_HDMI) { | |
314 | hdmi_dev_found = true; | |
315 | break; | |
316 | } | |
317 | } | |
318 | ||
319 | if (!hdmi_dev_found) { | |
320 | dev_err(&pdev->dev, "no driver for HDMI display found\n"); | |
321 | return -ENODEV; | |
322 | } | |
323 | ||
26039153 | 324 | dev_set_drvdata(&pdev->dev, hdmi_data); |
0ba7f849 KM |
325 | ret = snd_soc_register_component(&pdev->dev, &omap_hdmi_component, |
326 | &omap_hdmi_dai, 1); | |
a48d9b75 | 327 | |
9769824c PU |
328 | if (ret) |
329 | return ret; | |
330 | ||
331 | return omap_pcm_platform_register(&pdev->dev); | |
332 | } | |
bca2e41d | 333 | |
7ff60006 | 334 | static int omap_hdmi_remove(struct platform_device *pdev) |
bca2e41d | 335 | { |
a48d9b75 RN |
336 | struct hdmi_priv *hdmi_data = dev_get_drvdata(&pdev->dev); |
337 | ||
0ba7f849 | 338 | snd_soc_unregister_component(&pdev->dev); |
a48d9b75 RN |
339 | |
340 | if (hdmi_data == NULL) { | |
341 | dev_err(&pdev->dev, "cannot obtain HDMi data\n"); | |
342 | return -ENODEV; | |
343 | } | |
344 | ||
345 | omap_dss_put_device(hdmi_data->dssdev); | |
bca2e41d RN |
346 | return 0; |
347 | } | |
348 | ||
349 | static struct platform_driver hdmi_dai_driver = { | |
350 | .driver = { | |
351 | .name = DRV_NAME, | |
352 | .owner = THIS_MODULE, | |
353 | }, | |
354 | .probe = omap_hdmi_probe, | |
7ff60006 | 355 | .remove = omap_hdmi_remove, |
bca2e41d RN |
356 | }; |
357 | ||
beda5bf5 | 358 | module_platform_driver(hdmi_dai_driver); |
bca2e41d RN |
359 | |
360 | MODULE_AUTHOR("Jorge Candelaria <jorge.candelaria@ti.com>"); | |
361 | MODULE_AUTHOR("Ricardo Neri <ricardo.neri@ti.com>"); | |
362 | MODULE_DESCRIPTION("OMAP HDMI SoC Interface"); | |
363 | MODULE_LICENSE("GPL"); | |
364 | MODULE_ALIAS("platform:" DRV_NAME); |