2 * ALSA SoC Voice Codec Interface for TI DAVINCI processor
4 * Copyright (C) 2010 Texas Instruments.
6 * Author: Miguel Aguilar <miguel.aguilar@ridgerun.com>
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23 #include <linux/init.h>
24 #include <linux/module.h>
25 #include <linux/device.h>
26 #include <linux/delay.h>
28 #include <linux/mfd/davinci_voicecodec.h>
30 #include <sound/core.h>
31 #include <sound/pcm.h>
32 #include <sound/pcm_params.h>
33 #include <sound/initval.h>
34 #include <sound/soc.h>
36 #include "davinci-pcm.h"
37 #include "davinci-i2s.h"
38 #include "davinci-vcif.h"
40 #define MOD_REG_BIT(val, mask, set) do { \
48 struct davinci_vcif_dev {
49 struct davinci_vc *davinci_vc;
50 struct davinci_pcm_dma_params dma_params[2];
53 static void davinci_vcif_start(struct snd_pcm_substream *substream)
55 struct snd_soc_pcm_runtime *rtd = substream->private_data;
56 struct davinci_vcif_dev *davinci_vcif_dev =
57 rtd->dai->cpu_dai->private_data;
58 struct davinci_vc *davinci_vc = davinci_vcif_dev->davinci_vc;
61 /* Start the sample generator and enable transmitter/receiver */
62 w = readl(davinci_vc->base + DAVINCI_VC_CTRL);
64 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
65 MOD_REG_BIT(w, DAVINCI_VC_CTRL_RSTDAC, 1);
67 MOD_REG_BIT(w, DAVINCI_VC_CTRL_RSTADC, 1);
69 writel(w, davinci_vc->base + DAVINCI_VC_CTRL);
72 static void davinci_vcif_stop(struct snd_pcm_substream *substream)
74 struct snd_soc_pcm_runtime *rtd = substream->private_data;
75 struct davinci_vcif_dev *davinci_vcif_dev =
76 rtd->dai->cpu_dai->private_data;
77 struct davinci_vc *davinci_vc = davinci_vcif_dev->davinci_vc;
80 /* Reset transmitter/receiver and sample rate/frame sync generators */
81 w = readl(davinci_vc->base + DAVINCI_VC_CTRL);
82 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
83 MOD_REG_BIT(w, DAVINCI_VC_CTRL_RSTDAC, 0);
85 MOD_REG_BIT(w, DAVINCI_VC_CTRL_RSTADC, 0);
87 writel(w, davinci_vc->base + DAVINCI_VC_CTRL);
90 static int davinci_vcif_hw_params(struct snd_pcm_substream *substream,
91 struct snd_pcm_hw_params *params,
92 struct snd_soc_dai *dai)
94 struct davinci_vcif_dev *davinci_vcif_dev = dai->private_data;
95 struct davinci_vc *davinci_vc = davinci_vcif_dev->davinci_vc;
96 struct davinci_pcm_dma_params *dma_params =
97 &davinci_vcif_dev->dma_params[substream->stream];
100 /* Restart the codec before setup */
101 davinci_vcif_stop(substream);
102 davinci_vcif_start(substream);
104 /* General line settings */
105 writel(DAVINCI_VC_CTRL_MASK, davinci_vc->base + DAVINCI_VC_CTRL);
107 writel(DAVINCI_VC_INT_MASK, davinci_vc->base + DAVINCI_VC_INTCLR);
109 writel(DAVINCI_VC_INT_MASK, davinci_vc->base + DAVINCI_VC_INTEN);
111 w = readl(davinci_vc->base + DAVINCI_VC_CTRL);
113 /* Determine xfer data type */
114 switch (params_format(params)) {
115 case SNDRV_PCM_FORMAT_U8:
116 dma_params->data_type = 0;
118 MOD_REG_BIT(w, DAVINCI_VC_CTRL_RD_BITS_8 |
119 DAVINCI_VC_CTRL_RD_UNSIGNED |
120 DAVINCI_VC_CTRL_WD_BITS_8 |
121 DAVINCI_VC_CTRL_WD_UNSIGNED, 1);
123 case SNDRV_PCM_FORMAT_S8:
124 dma_params->data_type = 1;
126 MOD_REG_BIT(w, DAVINCI_VC_CTRL_RD_BITS_8 |
127 DAVINCI_VC_CTRL_WD_BITS_8, 1);
129 MOD_REG_BIT(w, DAVINCI_VC_CTRL_RD_UNSIGNED |
130 DAVINCI_VC_CTRL_WD_UNSIGNED, 0);
132 case SNDRV_PCM_FORMAT_S16_LE:
133 dma_params->data_type = 2;
135 MOD_REG_BIT(w, DAVINCI_VC_CTRL_RD_BITS_8 |
136 DAVINCI_VC_CTRL_RD_UNSIGNED |
137 DAVINCI_VC_CTRL_WD_BITS_8 |
138 DAVINCI_VC_CTRL_WD_UNSIGNED, 0);
141 printk(KERN_WARNING "davinci-vcif: unsupported PCM format");
145 dma_params->acnt = dma_params->data_type;
147 writel(w, davinci_vc->base + DAVINCI_VC_CTRL);
152 static int davinci_vcif_trigger(struct snd_pcm_substream *substream, int cmd,
153 struct snd_soc_dai *dai)
158 case SNDRV_PCM_TRIGGER_START:
159 case SNDRV_PCM_TRIGGER_RESUME:
160 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
161 davinci_vcif_start(substream);
162 case SNDRV_PCM_TRIGGER_STOP:
163 case SNDRV_PCM_TRIGGER_SUSPEND:
164 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
165 davinci_vcif_stop(substream);
174 #define DAVINCI_VCIF_RATES SNDRV_PCM_RATE_8000_48000
176 static struct snd_soc_dai_ops davinci_vcif_dai_ops = {
177 .trigger = davinci_vcif_trigger,
178 .hw_params = davinci_vcif_hw_params,
181 struct snd_soc_dai davinci_vcif_dai = {
182 .name = "davinci-vcif",
186 .rates = DAVINCI_VCIF_RATES,
187 .formats = SNDRV_PCM_FMTBIT_S16_LE,},
191 .rates = DAVINCI_VCIF_RATES,
192 .formats = SNDRV_PCM_FMTBIT_S16_LE,},
193 .ops = &davinci_vcif_dai_ops,
196 EXPORT_SYMBOL_GPL(davinci_vcif_dai);
198 static int davinci_vcif_probe(struct platform_device *pdev)
200 struct davinci_vc *davinci_vc = platform_get_drvdata(pdev);
201 struct davinci_vcif_dev *davinci_vcif_dev;
204 davinci_vcif_dev = kzalloc(sizeof(struct davinci_vcif_dev), GFP_KERNEL);
207 "could not allocate memory for private data\n");
212 davinci_vcif_dev->davinci_vc = davinci_vc;
213 davinci_vcif_dev->dma_params[SNDRV_PCM_STREAM_PLAYBACK].channel =
214 davinci_vc->davinci_vcif.dma_tx_channel;
215 davinci_vcif_dev->dma_params[SNDRV_PCM_STREAM_PLAYBACK].dma_addr =
216 davinci_vc->davinci_vcif.dma_tx_addr;
219 davinci_vcif_dev->dma_params[SNDRV_PCM_STREAM_CAPTURE].channel =
220 davinci_vc->davinci_vcif.dma_rx_channel;
221 davinci_vcif_dev->dma_params[SNDRV_PCM_STREAM_CAPTURE].dma_addr =
222 davinci_vc->davinci_vcif.dma_rx_addr;
224 davinci_vcif_dai.dev = &pdev->dev;
225 davinci_vcif_dai.capture.dma_data = davinci_vcif_dev->dma_params;
226 davinci_vcif_dai.playback.dma_data = davinci_vcif_dev->dma_params;
227 davinci_vcif_dai.private_data = davinci_vcif_dev;
229 ret = snd_soc_register_dai(&davinci_vcif_dai);
231 dev_err(&pdev->dev, "could not register dai\n");
238 kfree(davinci_vcif_dev);
243 static int davinci_vcif_remove(struct platform_device *pdev)
245 snd_soc_unregister_dai(&davinci_vcif_dai);
250 static struct platform_driver davinci_vcif_driver = {
251 .probe = davinci_vcif_probe,
252 .remove = davinci_vcif_remove,
254 .name = "davinci_vcif",
255 .owner = THIS_MODULE,
259 static int __init davinci_vcif_init(void)
261 return platform_driver_probe(&davinci_vcif_driver, davinci_vcif_probe);
263 module_init(davinci_vcif_init);
265 static void __exit davinci_vcif_exit(void)
267 platform_driver_unregister(&davinci_vcif_driver);
269 module_exit(davinci_vcif_exit);
271 MODULE_AUTHOR("Miguel Aguilar");
272 MODULE_DESCRIPTION("Texas Instruments DaVinci ASoC Voice Codec Interface");
273 MODULE_LICENSE("GPL");