diff options
Diffstat (limited to 'sound/soc/davinci/davinci-sffsdr.c')
| -rw-r--r-- | sound/soc/davinci/davinci-sffsdr.c | 180 |
1 files changed, 180 insertions, 0 deletions
diff --git a/sound/soc/davinci/davinci-sffsdr.c b/sound/soc/davinci/davinci-sffsdr.c new file mode 100644 index 00000000..0fe558c6 --- /dev/null +++ b/sound/soc/davinci/davinci-sffsdr.c @@ -0,0 +1,180 @@ +/* + * ASoC driver for Lyrtech SFFSDR board. + * + * Author: Hugo Villeneuve + * Copyright (C) 2008 Lyrtech inc + * + * Based on ASoC driver for TI DAVINCI EVM platform, original copyright follow: + * Copyright: (C) 2007 MontaVista Software, Inc., <source@mvista.com> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ + +#include <linux/module.h> +#include <linux/moduleparam.h> +#include <linux/timer.h> +#include <linux/interrupt.h> +#include <linux/platform_device.h> +#include <linux/gpio.h> +#include <sound/core.h> +#include <sound/pcm.h> +#include <sound/soc.h> + +#include <asm/dma.h> +#include <asm/mach-types.h> +#ifdef CONFIG_SFFSDR_FPGA +#include <asm/plat-sffsdr/sffsdr-fpga.h> +#endif + +#include <mach/edma.h> + +#include "../codecs/pcm3008.h" +#include "davinci-pcm.h" +#include "davinci-i2s.h" + +/* + * CLKX and CLKR are the inputs for the Sample Rate Generator. + * FSX and FSR are outputs, driven by the sample Rate Generator. + */ +#define AUDIO_FORMAT (SND_SOC_DAIFMT_DSP_B | \ + SND_SOC_DAIFMT_CBM_CFS | \ + SND_SOC_DAIFMT_IB_NF) + +static int sffsdr_hw_params(struct snd_pcm_substream *substream, + struct snd_pcm_hw_params *params) +{ + struct snd_soc_pcm_runtime *rtd = substream->private_data; + struct snd_soc_dai *cpu_dai = rtd->cpu_dai; + int fs; + int ret = 0; + + /* Fsref can be 32000, 44100 or 48000. */ + fs = params_rate(params); + +#ifndef CONFIG_SFFSDR_FPGA + /* Without the FPGA module, the Fs is fixed at 44100 Hz */ + if (fs != 44100) { + pr_debug("warning: only 44.1 kHz is supported without SFFSDR FPGA module\n"); + return -EINVAL; + } +#endif + + /* set cpu DAI configuration */ + ret = snd_soc_dai_set_fmt(cpu_dai, AUDIO_FORMAT); + if (ret < 0) + return ret; + + pr_debug("sffsdr_hw_params: rate = %d Hz\n", fs); + +#ifndef CONFIG_SFFSDR_FPGA + return 0; +#else + return sffsdr_fpga_set_codec_fs(fs); +#endif +} + +static struct snd_soc_ops sffsdr_ops = { + .hw_params = sffsdr_hw_params, +}; + +/* davinci-sffsdr digital audio interface glue - connects codec <--> CPU */ +static struct snd_soc_dai_link sffsdr_dai = { + .name = "PCM3008", /* Codec name */ + .stream_name = "PCM3008 HiFi", + .cpu_dai_name = "davinci-mcbsp", + .codec_dai_name = "pcm3008-hifi", + .codec_name = "pcm3008-codec", + .platform_name = "davinci-pcm-audio", + .ops = &sffsdr_ops, +}; + +/* davinci-sffsdr audio machine driver */ +static struct snd_soc_card snd_soc_sffsdr = { + .name = "DaVinci SFFSDR", + .dai_link = &sffsdr_dai, + .num_links = 1, +}; + +/* sffsdr audio private data */ +static struct pcm3008_setup_data sffsdr_pcm3008_setup = { + .dem0_pin = GPIO(45), + .dem1_pin = GPIO(46), + .pdad_pin = GPIO(47), + .pdda_pin = GPIO(38), +}; + +struct platform_device pcm3008_codec = { + .name = "pcm3008-codec", + .id = 0, + .dev = { + .platform_data = &sffsdr_pcm3008_setup, + }, +}; + +static struct resource sffsdr_snd_resources[] = { + { + .start = DAVINCI_MCBSP_BASE, + .end = DAVINCI_MCBSP_BASE + SZ_8K - 1, + .flags = IORESOURCE_MEM, + }, +}; + +static struct evm_snd_platform_data sffsdr_snd_data = { + .tx_dma_ch = DAVINCI_DMA_MCBSP_TX, + .rx_dma_ch = DAVINCI_DMA_MCBSP_RX, +}; + +static struct platform_device *sffsdr_snd_device; + +static int __init sffsdr_init(void) +{ + int ret; + + if (!machine_is_sffsdr()) + return -EINVAL; + + platform_device_register(&pcm3008_codec); + + sffsdr_snd_device = platform_device_alloc("soc-audio", 0); + if (!sffsdr_snd_device) { + printk(KERN_ERR "platform device allocation failed\n"); + return -ENOMEM; + } + + platform_set_drvdata(sffsdr_snd_device, &snd_soc_sffsdr); + platform_device_add_data(sffsdr_snd_device, &sffsdr_snd_data, + sizeof(sffsdr_snd_data)); + + ret = platform_device_add_resources(sffsdr_snd_device, + sffsdr_snd_resources, + ARRAY_SIZE(sffsdr_snd_resources)); + if (ret) { + printk(KERN_ERR "platform device add resources failed\n"); + goto error; + } + + ret = platform_device_add(sffsdr_snd_device); + if (ret) + goto error; + + return ret; + +error: + platform_device_put(sffsdr_snd_device); + return ret; +} + +static void __exit sffsdr_exit(void) +{ + platform_device_unregister(sffsdr_snd_device); + platform_device_unregister(&pcm3008_codec); +} + +module_init(sffsdr_init); +module_exit(sffsdr_exit); + +MODULE_AUTHOR("Hugo Villeneuve"); +MODULE_DESCRIPTION("Lyrtech SFFSDR ASoC driver"); +MODULE_LICENSE("GPL"); |