2 * omap-mcpdm.c -- OMAP ALSA SoC DAI driver using McPDM port
4 * Copyright (C) 2009 Texas Instruments
6 * Author: Misael Lopez Cruz <x0052729@ti.com>
7 * Contact: Jorge Eduardo Candelaria <x0107209@ti.com>
8 * Margarita Olaya <magi.olaya@ti.com>
10 * This program is free software; you can redistribute it and/or
11 * modify it under the terms of the GNU General Public License
12 * version 2 as published by the Free Software Foundation.
14 * This program is distributed in the hope that it will be useful, but
15 * WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17 * General Public License for more details.
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
26 #include <linux/init.h>
27 #include <linux/module.h>
28 #include <linux/device.h>
29 #include <sound/core.h>
30 #include <sound/pcm.h>
31 #include <sound/pcm_params.h>
32 #include <sound/initval.h>
33 #include <sound/soc.h>
36 #include <plat/mcbsp.h>
40 struct omap_mcpdm_data {
41 struct omap_mcpdm_link *links;
45 static struct omap_mcpdm_link omap_mcpdm_links[] = {
48 .irq_mask = MCPDM_DN_IRQ_EMPTY | MCPDM_DN_IRQ_FULL,
50 .format = PDMOUTFORMAT_LJUST,
54 .irq_mask = MCPDM_UP_IRQ_EMPTY | MCPDM_UP_IRQ_FULL,
56 .format = PDMOUTFORMAT_LJUST,
60 static struct omap_mcpdm_data mcpdm_data = {
61 .links = omap_mcpdm_links,
66 * Stream DMA parameters
68 static struct omap_pcm_dma_data omap_mcpdm_dai_dma_params[] = {
70 .name = "Audio playback",
71 .dma_req = OMAP44XX_DMA_MCPDM_DL,
72 .data_type = OMAP_DMA_DATA_TYPE_S32,
73 .sync_mode = OMAP_DMA_SYNC_PACKET,
75 .port_addr = OMAP44XX_MCPDM_L3_BASE + MCPDM_DN_DATA,
78 .name = "Audio capture",
79 .dma_req = OMAP44XX_DMA_MCPDM_UP,
80 .data_type = OMAP_DMA_DATA_TYPE_S32,
81 .sync_mode = OMAP_DMA_SYNC_PACKET,
83 .port_addr = OMAP44XX_MCPDM_L3_BASE + MCPDM_UP_DATA,
87 static int omap_mcpdm_dai_startup(struct snd_pcm_substream *substream,
88 struct snd_soc_dai *dai)
93 err = omap_mcpdm_request();
98 static void omap_mcpdm_dai_shutdown(struct snd_pcm_substream *substream,
99 struct snd_soc_dai *dai)
105 static int omap_mcpdm_dai_trigger(struct snd_pcm_substream *substream, int cmd,
106 struct snd_soc_dai *dai)
108 struct omap_mcpdm_data *mcpdm_priv = snd_soc_dai_get_drvdata(dai);
109 int stream = substream->stream;
113 case SNDRV_PCM_TRIGGER_START:
114 case SNDRV_PCM_TRIGGER_RESUME:
115 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
116 if (!mcpdm_priv->active++)
117 omap_mcpdm_start(stream);
120 case SNDRV_PCM_TRIGGER_STOP:
121 case SNDRV_PCM_TRIGGER_SUSPEND:
122 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
123 if (!--mcpdm_priv->active)
124 omap_mcpdm_stop(stream);
133 static int omap_mcpdm_dai_hw_params(struct snd_pcm_substream *substream,
134 struct snd_pcm_hw_params *params,
135 struct snd_soc_dai *dai)
137 struct omap_mcpdm_data *mcpdm_priv = snd_soc_dai_get_drvdata(dai);
138 struct omap_mcpdm_link *mcpdm_links = mcpdm_priv->links;
139 int stream = substream->stream;
140 int channels, err, link_mask = 0;
142 snd_soc_dai_set_dma_data(dai, substream,
143 &omap_mcpdm_dai_dma_params[stream]);
145 channels = params_channels(params);
148 if (stream == SNDRV_PCM_STREAM_CAPTURE)
149 /* up to 2 channels for capture */
153 if (stream == SNDRV_PCM_STREAM_CAPTURE)
154 /* up to 2 channels for capture */
163 /* unsupported number of channels */
167 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
168 mcpdm_links[stream].channels = link_mask << 3;
169 err = omap_mcpdm_playback_open(&mcpdm_links[stream]);
171 mcpdm_links[stream].channels = link_mask << 0;
172 err = omap_mcpdm_capture_open(&mcpdm_links[stream]);
178 static int omap_mcpdm_dai_hw_free(struct snd_pcm_substream *substream,
179 struct snd_soc_dai *dai)
181 struct omap_mcpdm_data *mcpdm_priv = snd_soc_dai_get_drvdata(dai);
182 struct omap_mcpdm_link *mcpdm_links = mcpdm_priv->links;
183 int stream = substream->stream;
186 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
187 err = omap_mcpdm_playback_close(&mcpdm_links[stream]);
189 err = omap_mcpdm_capture_close(&mcpdm_links[stream]);
194 static struct snd_soc_dai_ops omap_mcpdm_dai_ops = {
195 .startup = omap_mcpdm_dai_startup,
196 .shutdown = omap_mcpdm_dai_shutdown,
197 .trigger = omap_mcpdm_dai_trigger,
198 .hw_params = omap_mcpdm_dai_hw_params,
199 .hw_free = omap_mcpdm_dai_hw_free,
202 #define OMAP_MCPDM_RATES (SNDRV_PCM_RATE_88200 | SNDRV_PCM_RATE_96000)
203 #define OMAP_MCPDM_FORMATS (SNDRV_PCM_FMTBIT_S32_LE)
205 static int omap_mcpdm_dai_probe(struct snd_soc_dai *dai)
207 snd_soc_dai_set_drvdata(dai, &mcpdm_data);
211 static struct snd_soc_dai_driver omap_mcpdm_dai = {
212 .probe = omap_mcpdm_dai_probe,
216 .rates = OMAP_MCPDM_RATES,
217 .formats = OMAP_MCPDM_FORMATS,
222 .rates = OMAP_MCPDM_RATES,
223 .formats = OMAP_MCPDM_FORMATS,
225 .ops = &omap_mcpdm_dai_ops,
228 static __devinit int asoc_mcpdm_probe(struct platform_device *pdev)
232 ret = omap_mcpdm_probe(pdev);
235 ret = snd_soc_register_dai(&pdev->dev, &omap_mcpdm_dai);
237 omap_mcpdm_remove(pdev);
241 static int __devexit asoc_mcpdm_remove(struct platform_device *pdev)
243 snd_soc_unregister_dai(&pdev->dev);
244 omap_mcpdm_remove(pdev);
248 static struct platform_driver asoc_mcpdm_driver = {
250 .name = "omap-mcpdm-dai",
251 .owner = THIS_MODULE,
254 .probe = asoc_mcpdm_probe,
255 .remove = __devexit_p(asoc_mcpdm_remove),
258 static int __init snd_omap_mcpdm_init(void)
260 return platform_driver_register(&asoc_mcpdm_driver);
262 module_init(snd_omap_mcpdm_init);
264 static void __exit snd_omap_mcpdm_exit(void)
266 platform_driver_unregister(&asoc_mcpdm_driver);
268 module_exit(snd_omap_mcpdm_exit);
270 MODULE_AUTHOR("Misael Lopez Cruz <x0052729@ti.com>");
271 MODULE_DESCRIPTION("OMAP PDM SoC Interface");
272 MODULE_LICENSE("GPL");