1 /*
2 * File: sound/soc/blackfin/bf5xx-ad1836.c
3 * Author: Barry Song <Barry.Song@analog.com>
4 *
5 * Created: Aug 4 2009
6 * Description: Board driver for ad1836 sound chip
7 *
8 * Bugs: Enter bugs at http://blackfin.uclinux.org/
9 *
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License as published by
12 * the Free Software Foundation; either version 2 of the License, or
13 * (at your option) any later version.
14 *
15 */
16
17 #include <linux/module.h>
18 #include <linux/moduleparam.h>
19 #include <linux/device.h>
20 #include <sound/core.h>
21 #include <sound/pcm.h>
22 #include <sound/soc.h>
23 #include <sound/pcm_params.h>
24
25 #include <asm/blackfin.h>
26 #include <asm/cacheflush.h>
27 #include <asm/irq.h>
28 #include <asm/dma.h>
29 #include <asm/portmux.h>
30
31 #include "../codecs/ad1836.h"
32
33 static struct snd_soc_card bf5xx_ad1836;
34
bf5xx_ad1836_init(struct snd_soc_pcm_runtime * rtd)35 static int bf5xx_ad1836_init(struct snd_soc_pcm_runtime *rtd)
36 {
37 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
38 unsigned int channel_map[] = {0, 4, 1, 5, 2, 6, 3, 7};
39 int ret = 0;
40
41 /* set cpu DAI channel mapping */
42 ret = snd_soc_dai_set_channel_map(cpu_dai, ARRAY_SIZE(channel_map),
43 channel_map, ARRAY_SIZE(channel_map), channel_map);
44 if (ret < 0)
45 return ret;
46
47 ret = snd_soc_dai_set_tdm_slot(cpu_dai, 0xFF, 0xFF, 8, 32);
48 if (ret < 0)
49 return ret;
50
51 return 0;
52 }
53
54 #define BF5XX_AD1836_DAIFMT (SND_SOC_DAIFMT_DSP_A | SND_SOC_DAIFMT_IB_IF | \
55 SND_SOC_DAIFMT_CBM_CFM)
56
57 static struct snd_soc_dai_link bf5xx_ad1836_dai = {
58 .name = "ad1836",
59 .stream_name = "AD1836",
60 .codec_dai_name = "ad1836-hifi",
61 .platform_name = "bfin-i2s-pcm-audio",
62 .dai_fmt = BF5XX_AD1836_DAIFMT,
63 .init = bf5xx_ad1836_init,
64 };
65
66 static struct snd_soc_card bf5xx_ad1836 = {
67 .name = "bfin-ad1836",
68 .owner = THIS_MODULE,
69 .dai_link = &bf5xx_ad1836_dai,
70 .num_links = 1,
71 };
72
bf5xx_ad1836_driver_probe(struct platform_device * pdev)73 static int bf5xx_ad1836_driver_probe(struct platform_device *pdev)
74 {
75 struct snd_soc_card *card = &bf5xx_ad1836;
76 const char **link_name;
77 int ret;
78
79 link_name = pdev->dev.platform_data;
80 if (!link_name) {
81 dev_err(&pdev->dev, "No platform data supplied\n");
82 return -EINVAL;
83 }
84 bf5xx_ad1836_dai.cpu_dai_name = link_name[0];
85 bf5xx_ad1836_dai.codec_name = link_name[1];
86
87 card->dev = &pdev->dev;
88 platform_set_drvdata(pdev, card);
89
90 ret = devm_snd_soc_register_card(&pdev->dev, card);
91 if (ret)
92 dev_err(&pdev->dev, "Failed to register card\n");
93 return ret;
94 }
95
96 static struct platform_driver bf5xx_ad1836_driver = {
97 .driver = {
98 .name = "bfin-snd-ad1836",
99 .pm = &snd_soc_pm_ops,
100 },
101 .probe = bf5xx_ad1836_driver_probe,
102 };
103 module_platform_driver(bf5xx_ad1836_driver);
104
105 /* Module information */
106 MODULE_AUTHOR("Barry Song");
107 MODULE_DESCRIPTION("ALSA SoC AD1836 board driver");
108 MODULE_LICENSE("GPL");
109
110