ASoC: DaVinci: Voice Codec Interface
This patch adds the support for the interface needed by the DaVinci Voice Codec CQ93VC. Signed-off-by: Miguel Aguilar <miguel.aguilar@ridgerun.com> Acked-by: Liam Girdwood <lrg@slimlogic.co.uk> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
This commit is contained in:
Miguel Aguilar
Mark Brown
parent
ca26308c22
commit
e155fcc23c
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@ -12,6 +12,9 @@ config SND_DAVINCI_SOC_I2S
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config SND_DAVINCI_SOC_MCASP
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tristate
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config SND_DAVINCI_SOC_VCIF
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tristate
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config SND_DAVINCI_SOC_EVM
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tristate "SoC Audio support for DaVinci DM6446, DM355 or DM365 EVM"
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depends on SND_DAVINCI_SOC
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@ -2,10 +2,12 @@
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snd-soc-davinci-objs := davinci-pcm.o
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snd-soc-davinci-i2s-objs := davinci-i2s.o
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snd-soc-davinci-mcasp-objs:= davinci-mcasp.o
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snd-soc-davinci-vcif-objs:= davinci-vcif.o
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obj-$(CONFIG_SND_DAVINCI_SOC) += snd-soc-davinci.o
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obj-$(CONFIG_SND_DAVINCI_SOC_I2S) += snd-soc-davinci-i2s.o
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obj-$(CONFIG_SND_DAVINCI_SOC_MCASP) += snd-soc-davinci-mcasp.o
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obj-$(CONFIG_SND_DAVINCI_SOC_VCIF) += snd-soc-davinci-vcif.o
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# DAVINCI Machine Support
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snd-soc-evm-objs := davinci-evm.o
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@ -0,0 +1,272 @@
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/*
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* ALSA SoC Voice Codec Interface for TI DAVINCI processor
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*
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* Copyright (C) 2010 Texas Instruments.
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*
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* Author: Miguel Aguilar <miguel.aguilar@ridgerun.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include <linux/init.h>
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#include <linux/module.h>
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#include <linux/device.h>
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#include <linux/delay.h>
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#include <linux/io.h>
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#include <linux/mfd/davinci_voicecodec.h>
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#include <sound/core.h>
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#include <sound/pcm.h>
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#include <sound/pcm_params.h>
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#include <sound/initval.h>
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#include <sound/soc.h>
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#include "davinci-pcm.h"
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#include "davinci-i2s.h"
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#include "davinci-vcif.h"
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#define MOD_REG_BIT(val, mask, set) do { \
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if (set) { \
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val |= mask; \
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} else { \
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val &= ~mask; \
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} \
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} while (0)
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struct davinci_vcif_dev {
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struct davinci_vc *davinci_vc;
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struct davinci_pcm_dma_params dma_params[2];
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};
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static void davinci_vcif_start(struct snd_pcm_substream *substream)
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{
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struct snd_soc_pcm_runtime *rtd = substream->private_data;
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struct davinci_vcif_dev *davinci_vcif_dev =
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rtd->dai->cpu_dai->private_data;
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struct davinci_vc *davinci_vc = davinci_vcif_dev->davinci_vc;
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u32 w;
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/* Start the sample generator and enable transmitter/receiver */
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w = readl(davinci_vc->base + DAVINCI_VC_CTRL);
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if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
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MOD_REG_BIT(w, DAVINCI_VC_CTRL_RSTDAC, 1);
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else
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MOD_REG_BIT(w, DAVINCI_VC_CTRL_RSTADC, 1);
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writel(w, davinci_vc->base + DAVINCI_VC_CTRL);
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}
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static void davinci_vcif_stop(struct snd_pcm_substream *substream)
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{
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struct snd_soc_pcm_runtime *rtd = substream->private_data;
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struct davinci_vcif_dev *davinci_vcif_dev =
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rtd->dai->cpu_dai->private_data;
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struct davinci_vc *davinci_vc = davinci_vcif_dev->davinci_vc;
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u32 w;
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/* Reset transmitter/receiver and sample rate/frame sync generators */
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w = readl(davinci_vc->base + DAVINCI_VC_CTRL);
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if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
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MOD_REG_BIT(w, DAVINCI_VC_CTRL_RSTDAC, 0);
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else
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MOD_REG_BIT(w, DAVINCI_VC_CTRL_RSTADC, 0);
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writel(w, davinci_vc->base + DAVINCI_VC_CTRL);
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}
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static int davinci_vcif_hw_params(struct snd_pcm_substream *substream,
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struct snd_pcm_hw_params *params,
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struct snd_soc_dai *dai)
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{
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struct davinci_vcif_dev *davinci_vcif_dev = dai->private_data;
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struct davinci_vc *davinci_vc = davinci_vcif_dev->davinci_vc;
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struct davinci_pcm_dma_params *dma_params =
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&davinci_vcif_dev->dma_params[substream->stream];
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u32 w;
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/* Restart the codec before setup */
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davinci_vcif_stop(substream);
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davinci_vcif_start(substream);
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/* General line settings */
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writel(DAVINCI_VC_CTRL_MASK, davinci_vc->base + DAVINCI_VC_CTRL);
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writel(DAVINCI_VC_INT_MASK, davinci_vc->base + DAVINCI_VC_INTCLR);
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writel(DAVINCI_VC_INT_MASK, davinci_vc->base + DAVINCI_VC_INTEN);
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w = readl(davinci_vc->base + DAVINCI_VC_CTRL);
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/* Determine xfer data type */
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switch (params_format(params)) {
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case SNDRV_PCM_FORMAT_U8:
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dma_params->data_type = 0;
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MOD_REG_BIT(w, DAVINCI_VC_CTRL_RD_BITS_8 |
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DAVINCI_VC_CTRL_RD_UNSIGNED |
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DAVINCI_VC_CTRL_WD_BITS_8 |
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DAVINCI_VC_CTRL_WD_UNSIGNED, 1);
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break;
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case SNDRV_PCM_FORMAT_S8:
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dma_params->data_type = 1;
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MOD_REG_BIT(w, DAVINCI_VC_CTRL_RD_BITS_8 |
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DAVINCI_VC_CTRL_WD_BITS_8, 1);
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MOD_REG_BIT(w, DAVINCI_VC_CTRL_RD_UNSIGNED |
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DAVINCI_VC_CTRL_WD_UNSIGNED, 0);
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break;
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case SNDRV_PCM_FORMAT_S16_LE:
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dma_params->data_type = 2;
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MOD_REG_BIT(w, DAVINCI_VC_CTRL_RD_BITS_8 |
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DAVINCI_VC_CTRL_RD_UNSIGNED |
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DAVINCI_VC_CTRL_WD_BITS_8 |
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DAVINCI_VC_CTRL_WD_UNSIGNED, 0);
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break;
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default:
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printk(KERN_WARNING "davinci-vcif: unsupported PCM format");
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return -EINVAL;
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}
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dma_params->acnt = dma_params->data_type;
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writel(w, davinci_vc->base + DAVINCI_VC_CTRL);
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return 0;
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}
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static int davinci_vcif_trigger(struct snd_pcm_substream *substream, int cmd,
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struct snd_soc_dai *dai)
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{
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int ret = 0;
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switch (cmd) {
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case SNDRV_PCM_TRIGGER_START:
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case SNDRV_PCM_TRIGGER_RESUME:
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case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
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davinci_vcif_start(substream);
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case SNDRV_PCM_TRIGGER_STOP:
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case SNDRV_PCM_TRIGGER_SUSPEND:
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case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
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davinci_vcif_stop(substream);
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break;
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default:
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ret = -EINVAL;
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}
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return ret;
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}
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#define DAVINCI_VCIF_RATES SNDRV_PCM_RATE_8000_48000
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static struct snd_soc_dai_ops davinci_vcif_dai_ops = {
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.trigger = davinci_vcif_trigger,
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.hw_params = davinci_vcif_hw_params,
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};
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struct snd_soc_dai davinci_vcif_dai = {
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.name = "davinci-vcif",
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.playback = {
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.channels_min = 1,
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.channels_max = 2,
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.rates = DAVINCI_VCIF_RATES,
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.formats = SNDRV_PCM_FMTBIT_S16_LE,},
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.capture = {
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.channels_min = 1,
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.channels_max = 2,
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.rates = DAVINCI_VCIF_RATES,
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.formats = SNDRV_PCM_FMTBIT_S16_LE,},
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.ops = &davinci_vcif_dai_ops,
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};
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EXPORT_SYMBOL_GPL(davinci_vcif_dai);
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static int davinci_vcif_probe(struct platform_device *pdev)
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{
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struct davinci_vc *davinci_vc = platform_get_drvdata(pdev);
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struct davinci_vcif_dev *davinci_vcif_dev;
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int ret;
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davinci_vcif_dev = kzalloc(sizeof(struct davinci_vcif_dev), GFP_KERNEL);
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if (!davinci_vc) {
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dev_dbg(&pdev->dev,
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"could not allocate memory for private data\n");
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return -ENOMEM;
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}
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/* DMA tx params */
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davinci_vcif_dev->davinci_vc = davinci_vc;
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davinci_vcif_dev->dma_params[SNDRV_PCM_STREAM_PLAYBACK].channel =
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davinci_vc->davinci_vcif.dma_tx_channel;
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davinci_vcif_dev->dma_params[SNDRV_PCM_STREAM_PLAYBACK].dma_addr =
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davinci_vc->davinci_vcif.dma_tx_addr;
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/* DMA rx params */
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davinci_vcif_dev->dma_params[SNDRV_PCM_STREAM_CAPTURE].channel =
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davinci_vc->davinci_vcif.dma_rx_channel;
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davinci_vcif_dev->dma_params[SNDRV_PCM_STREAM_CAPTURE].dma_addr =
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davinci_vc->davinci_vcif.dma_rx_addr;
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davinci_vcif_dai.dev = &pdev->dev;
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davinci_vcif_dai.dma_data = davinci_vcif_dev->dma_params;
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davinci_vcif_dai.private_data = davinci_vcif_dev;
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ret = snd_soc_register_dai(&davinci_vcif_dai);
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if (ret != 0) {
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dev_err(&pdev->dev, "could not register dai\n");
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goto fail;
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}
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return 0;
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fail:
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kfree(davinci_vcif_dev);
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return ret;
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}
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static int davinci_vcif_remove(struct platform_device *pdev)
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{
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snd_soc_unregister_dai(&davinci_vcif_dai);
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return 0;
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}
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static struct platform_driver davinci_vcif_driver = {
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.probe = davinci_vcif_probe,
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.remove = davinci_vcif_remove,
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.driver = {
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.name = "davinci_vcif",
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.owner = THIS_MODULE,
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},
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};
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static int __init davinci_vcif_init(void)
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{
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return platform_driver_probe(&davinci_vcif_driver, davinci_vcif_probe);
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}
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module_init(davinci_vcif_init);
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static void __exit davinci_vcif_exit(void)
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{
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platform_driver_unregister(&davinci_vcif_driver);
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}
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module_exit(davinci_vcif_exit);
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MODULE_AUTHOR("Miguel Aguilar");
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MODULE_DESCRIPTION("Texas Instruments DaVinci ASoC Voice Codec Interface");
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MODULE_LICENSE("GPL");
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@ -0,0 +1,28 @@
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/*
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* ALSA SoC Voice Codec Interface for TI DAVINCI processor
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*
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* Copyright (C) 2010 Texas Instruments.
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*
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* Author: Miguel Aguilar <miguel.aguilar@ridgerun.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#ifndef _DAVINCI_VCIF_H
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#define _DAVINCI_VCIF_H
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extern struct snd_soc_dai davinci_vcif_dai;
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#endif
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