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The OMAP McBSP driver stack used to contain two different drivers. One of them was used as kind low-level access to the IP, while the other driver was the ASoC DAI driver. There were global, shared structures, in different places, the McBSP instances are reffered with id numbers (sometimes 0 based, in other cases 1 based id numbers). Create one single driver for OMAP McBSP with name: omap-mcbsp. Convert the old omap-mcbsp driver initially to be a library for the omap-mcbsp DAI driver. With this change we can get rid of all global variables, structures. Further cleanup is coming... Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com> Tested-by: Grazvydas Ignotas <notasas@gmail.com> Tested-by: Janusz Krzysztofik <jkrzyszt@tis.icnet.pl> Acked-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Acked-by: Jarkko Nikula <jarkko.nikula@bitmer.com> Signed-off-by: Liam Girdwood <lrg@ti.com>
151 lines
3.7 KiB
C
151 lines
3.7 KiB
C
/*
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* omap3beagle.c -- SoC audio for OMAP3 Beagle
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*
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* Author: Steve Sakoman <steve@sakoman.com>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* version 2 as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* 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., 51 Franklin St, Fifth Floor, Boston, MA
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* 02110-1301 USA
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*
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*/
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#include <linux/clk.h>
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#include <linux/platform_device.h>
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#include <linux/module.h>
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#include <sound/core.h>
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#include <sound/pcm.h>
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#include <sound/soc.h>
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#include <asm/mach-types.h>
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#include <mach/hardware.h>
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#include <mach/gpio.h>
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#include <plat/mcbsp.h>
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#include "omap-mcbsp.h"
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#include "omap-pcm.h"
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static int omap3beagle_hw_params(struct snd_pcm_substream *substream,
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struct snd_pcm_hw_params *params)
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{
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struct snd_soc_pcm_runtime *rtd = substream->private_data;
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struct snd_soc_dai *codec_dai = rtd->codec_dai;
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struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
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unsigned int fmt;
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int ret;
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switch (params_channels(params)) {
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case 2: /* Stereo I2S mode */
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fmt = SND_SOC_DAIFMT_I2S |
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SND_SOC_DAIFMT_NB_NF |
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SND_SOC_DAIFMT_CBM_CFM;
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break;
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case 4: /* Four channel TDM mode */
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fmt = SND_SOC_DAIFMT_DSP_A |
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SND_SOC_DAIFMT_IB_NF |
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SND_SOC_DAIFMT_CBM_CFM;
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break;
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default:
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return -EINVAL;
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}
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/* Set codec DAI configuration */
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ret = snd_soc_dai_set_fmt(codec_dai, fmt);
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if (ret < 0) {
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printk(KERN_ERR "can't set codec DAI configuration\n");
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return ret;
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}
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/* Set cpu DAI configuration */
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ret = snd_soc_dai_set_fmt(cpu_dai, fmt);
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if (ret < 0) {
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printk(KERN_ERR "can't set cpu DAI configuration\n");
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return ret;
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}
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/* Set the codec system clock for DAC and ADC */
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ret = snd_soc_dai_set_sysclk(codec_dai, 0, 26000000,
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SND_SOC_CLOCK_IN);
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if (ret < 0) {
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printk(KERN_ERR "can't set codec system clock\n");
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return ret;
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}
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return 0;
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}
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static struct snd_soc_ops omap3beagle_ops = {
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.hw_params = omap3beagle_hw_params,
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};
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/* Digital audio interface glue - connects codec <--> CPU */
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static struct snd_soc_dai_link omap3beagle_dai = {
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.name = "TWL4030",
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.stream_name = "TWL4030",
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.cpu_dai_name = "omap-mcbsp.2",
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.platform_name = "omap-pcm-audio",
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.codec_dai_name = "twl4030-hifi",
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.codec_name = "twl4030-codec",
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.ops = &omap3beagle_ops,
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};
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/* Audio machine driver */
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static struct snd_soc_card snd_soc_omap3beagle = {
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.name = "omap3beagle",
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.owner = THIS_MODULE,
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.dai_link = &omap3beagle_dai,
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.num_links = 1,
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};
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static struct platform_device *omap3beagle_snd_device;
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static int __init omap3beagle_soc_init(void)
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{
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int ret;
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if (!(machine_is_omap3_beagle() || machine_is_devkit8000()))
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return -ENODEV;
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pr_info("OMAP3 Beagle/Devkit8000 SoC init\n");
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omap3beagle_snd_device = platform_device_alloc("soc-audio", -1);
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if (!omap3beagle_snd_device) {
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printk(KERN_ERR "Platform device allocation failed\n");
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return -ENOMEM;
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}
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platform_set_drvdata(omap3beagle_snd_device, &snd_soc_omap3beagle);
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ret = platform_device_add(omap3beagle_snd_device);
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if (ret)
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goto err1;
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return 0;
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err1:
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printk(KERN_ERR "Unable to add platform device\n");
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platform_device_put(omap3beagle_snd_device);
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return ret;
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}
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static void __exit omap3beagle_soc_exit(void)
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{
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platform_device_unregister(omap3beagle_snd_device);
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}
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module_init(omap3beagle_soc_init);
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module_exit(omap3beagle_soc_exit);
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MODULE_AUTHOR("Steve Sakoman <steve@sakoman.com>");
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MODULE_DESCRIPTION("ALSA SoC OMAP3 Beagle");
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MODULE_LICENSE("GPL");
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