145 строки
3.6 KiB
C
145 строки
3.6 KiB
C
/*
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* Sample Au12x0/Au1550 PSC AC97 sound machine.
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*
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* Copyright (c) 2007-2008 Manuel Lauss <mano@roarinelk.homelinux.net>
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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 outlined in the file COPYING at the root of this
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* source archive.
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*
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* This is a very generic AC97 sound machine driver for boards which
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* have (AC97) audio at PSC1 (e.g. DB1200 demoboards).
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*/
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#include <linux/module.h>
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#include <linux/moduleparam.h>
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#include <linux/timer.h>
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#include <linux/interrupt.h>
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#include <linux/platform_device.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 <sound/soc-dapm.h>
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#include <asm/mach-au1x00/au1000.h>
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#include <asm/mach-au1x00/au1xxx_psc.h>
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#include <asm/mach-au1x00/au1xxx_dbdma.h>
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#include "../codecs/ac97.h"
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#include "psc.h"
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static int au1xpsc_sample_ac97_init(struct snd_soc_codec *codec)
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{
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snd_soc_dapm_sync(codec);
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return 0;
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}
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static struct snd_soc_dai_link au1xpsc_sample_ac97_dai = {
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.name = "AC97",
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.stream_name = "AC97 HiFi",
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.cpu_dai = &au1xpsc_ac97_dai, /* see psc-ac97.c */
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.codec_dai = &ac97_dai, /* see codecs/ac97.c */
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.init = au1xpsc_sample_ac97_init,
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.ops = NULL,
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};
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static struct snd_soc_machine au1xpsc_sample_ac97_machine = {
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.name = "Au1xxx PSC AC97 Audio",
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.dai_link = &au1xpsc_sample_ac97_dai,
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.num_links = 1,
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};
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static struct snd_soc_device au1xpsc_sample_ac97_devdata = {
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.machine = &au1xpsc_sample_ac97_machine,
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.platform = &au1xpsc_soc_platform, /* see dbdma2.c */
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.codec_dev = &soc_codec_dev_ac97,
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};
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static struct resource au1xpsc_psc1_res[] = {
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[0] = {
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.start = CPHYSADDR(PSC1_BASE_ADDR),
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.end = CPHYSADDR(PSC1_BASE_ADDR) + 0x000fffff,
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.flags = IORESOURCE_MEM,
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},
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[1] = {
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#ifdef CONFIG_SOC_AU1200
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.start = AU1200_PSC1_INT,
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.end = AU1200_PSC1_INT,
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#elif defined(CONFIG_SOC_AU1550)
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.start = AU1550_PSC1_INT,
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.end = AU1550_PSC1_INT,
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#endif
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.flags = IORESOURCE_IRQ,
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},
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[2] = {
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.start = DSCR_CMD0_PSC1_TX,
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.end = DSCR_CMD0_PSC1_TX,
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.flags = IORESOURCE_DMA,
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},
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[3] = {
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.start = DSCR_CMD0_PSC1_RX,
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.end = DSCR_CMD0_PSC1_RX,
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.flags = IORESOURCE_DMA,
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},
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};
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static struct platform_device *au1xpsc_sample_ac97_dev;
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static int __init au1xpsc_sample_ac97_load(void)
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{
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int ret;
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#ifdef CONFIG_SOC_AU1200
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unsigned long io;
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/* modify sys_pinfunc for AC97 on PSC1 */
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io = au_readl(SYS_PINFUNC);
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io |= SYS_PINFUNC_P1C;
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io &= ~(SYS_PINFUNC_P1A | SYS_PINFUNC_P1B);
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au_writel(io, SYS_PINFUNC);
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au_sync();
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#endif
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ret = -ENOMEM;
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/* setup PSC clock source for AC97 part: external clock provided
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* by codec. The psc-ac97.c driver depends on this setting!
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*/
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au_writel(PSC_SEL_CLK_SERCLK, PSC1_BASE_ADDR + PSC_SEL_OFFSET);
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au_sync();
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au1xpsc_sample_ac97_dev = platform_device_alloc("soc-audio", -1);
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if (!au1xpsc_sample_ac97_dev)
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goto out;
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au1xpsc_sample_ac97_dev->resource =
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kmemdup(au1xpsc_psc1_res, sizeof(struct resource) *
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ARRAY_SIZE(au1xpsc_psc1_res), GFP_KERNEL);
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au1xpsc_sample_ac97_dev->num_resources = ARRAY_SIZE(au1xpsc_psc1_res);
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au1xpsc_sample_ac97_dev->id = 1;
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platform_set_drvdata(au1xpsc_sample_ac97_dev,
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&au1xpsc_sample_ac97_devdata);
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au1xpsc_sample_ac97_devdata.dev = &au1xpsc_sample_ac97_dev->dev;
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ret = platform_device_add(au1xpsc_sample_ac97_dev);
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if (ret) {
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platform_device_put(au1xpsc_sample_ac97_dev);
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au1xpsc_sample_ac97_dev = NULL;
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}
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out:
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return ret;
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}
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static void __exit au1xpsc_sample_ac97_exit(void)
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{
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platform_device_unregister(au1xpsc_sample_ac97_dev);
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}
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module_init(au1xpsc_sample_ac97_load);
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module_exit(au1xpsc_sample_ac97_exit);
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MODULE_LICENSE("GPL");
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MODULE_DESCRIPTION("Au1xxx PSC sample AC97 machine");
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MODULE_AUTHOR("Manuel Lauss <mano@roarinelk.homelinux.net>");
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