LXR linux/sound/soc/au1x/sample-ac97.c

   1/*
   2 * Sample Au12x0/Au1550 PSC AC97 sound machine.
   3 *
   4 * Copyright (c) 2007-2008 Manuel Lauss <mano@roarinelk.homelinux.net>
   5 *
   6 *  This program is free software; you can redistribute it and/or modify
   7 *  it under the terms outlined in the file COPYING at the root of this
   8 *  source archive.
   9 *
  10 * This is a very generic AC97 sound machine driver for boards which
  11 * have (AC97) audio at PSC1 (e.g. DB1200 demoboards).
  12 */
  13
  14#include <linux/module.h>
  15#include <linux/moduleparam.h>
  16#include <linux/timer.h>
  17#include <linux/interrupt.h>
  18#include <linux/platform_device.h>
  19#include <sound/core.h>
  20#include <sound/pcm.h>
  21#include <sound/soc.h>
  22#include <sound/soc-dapm.h>
  23#include <asm/mach-au1x00/au1000.h>
  24#include <asm/mach-au1x00/au1xxx_psc.h>
  25#include <asm/mach-au1x00/au1xxx_dbdma.h>
  26
  27#include "../codecs/ac97.h"
  28#include "psc.h"
  29
  30static int au1xpsc_sample_ac97_init(struct snd_soc_codec *codec)
  31{
  32        snd_soc_dapm_sync(codec);
  33        return 0;
  34}
  35
  36static struct snd_soc_dai_link au1xpsc_sample_ac97_dai = {
  37        .name           = "AC97",
  38        .stream_name    = "AC97 HiFi",
  39        .cpu_dai        = &au1xpsc_ac97_dai,    /* see psc-ac97.c */
  40        .codec_dai      = &ac97_dai,            /* see codecs/ac97.c */
  41        .init           = au1xpsc_sample_ac97_init,
  42        .ops            = NULL,
  43};
  44
  45static struct snd_soc_card au1xpsc_sample_ac97_machine = {
  46        .name           = "Au1xxx PSC AC97 Audio",
  47        .dai_link       = &au1xpsc_sample_ac97_dai,
  48        .num_links      = 1,
  49};
  50
  51static struct snd_soc_device au1xpsc_sample_ac97_devdata = {
  52        .card           = &au1xpsc_sample_ac97_machine,
  53        .platform       = &au1xpsc_soc_platform, /* see dbdma2.c */
  54        .codec_dev      = &soc_codec_dev_ac97,
  55};
  56
  57static struct resource au1xpsc_psc1_res[] = {
  58        [0] = {
  59                .start  = CPHYSADDR(PSC1_BASE_ADDR),
  60                .end    = CPHYSADDR(PSC1_BASE_ADDR) + 0x000fffff,
  61                .flags  = IORESOURCE_MEM,
  62        },
  63        [1] = {
  64#ifdef CONFIG_SOC_AU1200
  65                .start  = AU1200_PSC1_INT,
  66                .end    = AU1200_PSC1_INT,
  67#elif defined(CONFIG_SOC_AU1550)
  68                .start  = AU1550_PSC1_INT,
  69                .end    = AU1550_PSC1_INT,
  70#endif
  71                .flags  = IORESOURCE_IRQ,
  72        },
  73        [2] = {
  74                .start  = DSCR_CMD0_PSC1_TX,
  75                .end    = DSCR_CMD0_PSC1_TX,
  76                .flags  = IORESOURCE_DMA,
  77        },
  78        [3] = {
  79                .start  = DSCR_CMD0_PSC1_RX,
  80                .end    = DSCR_CMD0_PSC1_RX,
  81                .flags  = IORESOURCE_DMA,
  82        },
  83};
  84
  85static struct platform_device *au1xpsc_sample_ac97_dev;
  86
  87static int __init au1xpsc_sample_ac97_load(void)
  88{
  89        int ret;
  90
  91#ifdef CONFIG_SOC_AU1200
  92        unsigned long io;
  93
  94        /* modify sys_pinfunc for AC97 on PSC1 */
  95        io = au_readl(SYS_PINFUNC);
  96        io |= SYS_PINFUNC_P1C;
  97        io &= ~(SYS_PINFUNC_P1A | SYS_PINFUNC_P1B);
  98        au_writel(io, SYS_PINFUNC);
  99        au_sync();
 100#endif
 101
 102        ret = -ENOMEM;
 103
 104        /* setup PSC clock source for AC97 part: external clock provided
 105         * by codec.  The psc-ac97.c driver depends on this setting!
 106         */
 107        au_writel(PSC_SEL_CLK_SERCLK, PSC1_BASE_ADDR + PSC_SEL_OFFSET);
 108        au_sync();
 109
 110        au1xpsc_sample_ac97_dev = platform_device_alloc("soc-audio", -1);
 111        if (!au1xpsc_sample_ac97_dev)
 112                goto out;
 113
 114        au1xpsc_sample_ac97_dev->resource =
 115                kmemdup(au1xpsc_psc1_res, sizeof(struct resource) *
 116                        ARRAY_SIZE(au1xpsc_psc1_res), GFP_KERNEL);
 117        au1xpsc_sample_ac97_dev->num_resources = ARRAY_SIZE(au1xpsc_psc1_res);
 118        au1xpsc_sample_ac97_dev->id = 1;
 119
 120        platform_set_drvdata(au1xpsc_sample_ac97_dev,
 121                             &au1xpsc_sample_ac97_devdata);
 122        au1xpsc_sample_ac97_devdata.dev = &au1xpsc_sample_ac97_dev->dev;
 123        ret = platform_device_add(au1xpsc_sample_ac97_dev);
 124
 125        if (ret) {
 126                platform_device_put(au1xpsc_sample_ac97_dev);
 127                au1xpsc_sample_ac97_dev = NULL;
 128        }
 129
 130out:
 131        return ret;
 132}
 133
 134static void __exit au1xpsc_sample_ac97_exit(void)
 135{
 136        platform_device_unregister(au1xpsc_sample_ac97_dev);
 137}
 138
 139module_init(au1xpsc_sample_ac97_load);
 140module_exit(au1xpsc_sample_ac97_exit);
 141
 142MODULE_LICENSE("GPL");
 143MODULE_DESCRIPTION("Au1xxx PSC sample AC97 machine");
 144MODULE_AUTHOR("Manuel Lauss <mano@roarinelk.homelinux.net>");
 145