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-rw-r--r--sound/soc/au1x/sample-ac97.c144
1 files changed, 144 insertions, 0 deletions
diff --git a/sound/soc/au1x/sample-ac97.c b/sound/soc/au1x/sample-ac97.c
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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_machine 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 .machine = &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>");