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Linux/sound/soc/ux500/mop500.c

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  1 /*
  2  * Copyright (C) ST-Ericsson SA 2012
  3  *
  4  * Author: Ola Lilja (ola.o.lilja@stericsson.com)
  5  *         for ST-Ericsson.
  6  *
  7  * License terms:
  8  *
  9  * This program is free software; you can redistribute it and/or modify
 10  * it under the terms of the GNU General Public License version 2 as published
 11  * by the Free Software Foundation.
 12  */
 13 
 14 #include <asm/mach-types.h>
 15 
 16 #include <linux/module.h>
 17 #include <linux/io.h>
 18 #include <linux/spi/spi.h>
 19 #include <linux/of.h>
 20 
 21 #include <sound/soc.h>
 22 #include <sound/initval.h>
 23 
 24 #include "ux500_pcm.h"
 25 #include "ux500_msp_dai.h"
 26 
 27 #include "mop500_ab8500.h"
 28 
 29 /* Define the whole MOP500 soundcard, linking platform to the codec-drivers  */
 30 static struct snd_soc_dai_link mop500_dai_links[] = {
 31         {
 32                 .name = "ab8500_0",
 33                 .stream_name = "ab8500_0",
 34                 .cpu_dai_name = "ux500-msp-i2s.1",
 35                 .codec_dai_name = "ab8500-codec-dai.0",
 36                 .platform_name = "ux500-msp-i2s.1",
 37                 .codec_name = "ab8500-codec.0",
 38                 .init = mop500_ab8500_machine_init,
 39                 .ops = mop500_ab8500_ops,
 40         },
 41         {
 42                 .name = "ab8500_1",
 43                 .stream_name = "ab8500_1",
 44                 .cpu_dai_name = "ux500-msp-i2s.3",
 45                 .codec_dai_name = "ab8500-codec-dai.1",
 46                 .platform_name = "ux500-msp-i2s.3",
 47                 .codec_name = "ab8500-codec.0",
 48                 .init = NULL,
 49                 .ops = mop500_ab8500_ops,
 50         },
 51 };
 52 
 53 static struct snd_soc_card mop500_card = {
 54         .name = "MOP500-card",
 55         .owner = THIS_MODULE,
 56         .probe = NULL,
 57         .dai_link = mop500_dai_links,
 58         .num_links = ARRAY_SIZE(mop500_dai_links),
 59 };
 60 
 61 static void mop500_of_node_put(void)
 62 {
 63         int i;
 64 
 65         for (i = 0; i < 2; i++) {
 66                 of_node_put(mop500_dai_links[i].cpu_of_node);
 67                 of_node_put(mop500_dai_links[i].codec_of_node);
 68         }
 69 }
 70 
 71 static int mop500_of_probe(struct platform_device *pdev,
 72                            struct device_node *np)
 73 {
 74         struct device_node *codec_np, *msp_np[2];
 75         int i;
 76 
 77         msp_np[0] = of_parse_phandle(np, "stericsson,cpu-dai", 0);
 78         msp_np[1] = of_parse_phandle(np, "stericsson,cpu-dai", 1);
 79         codec_np  = of_parse_phandle(np, "stericsson,audio-codec", 0);
 80 
 81         if (!(msp_np[0] && msp_np[1] && codec_np)) {
 82                 dev_err(&pdev->dev, "Phandle missing or invalid\n");
 83                 mop500_of_node_put();
 84                 return -EINVAL;
 85         }
 86 
 87         for (i = 0; i < 2; i++) {
 88                 mop500_dai_links[i].cpu_of_node = msp_np[i];
 89                 mop500_dai_links[i].cpu_dai_name = NULL;
 90                 mop500_dai_links[i].platform_of_node = msp_np[i];
 91                 mop500_dai_links[i].platform_name = NULL;
 92                 mop500_dai_links[i].codec_of_node = codec_np;
 93                 mop500_dai_links[i].codec_name = NULL;
 94         }
 95 
 96         snd_soc_of_parse_card_name(&mop500_card, "stericsson,card-name");
 97 
 98         return 0;
 99 }
100 
101 static int mop500_probe(struct platform_device *pdev)
102 {
103         struct device_node *np = pdev->dev.of_node;
104         int ret;
105 
106         dev_dbg(&pdev->dev, "%s: Enter.\n", __func__);
107 
108         mop500_card.dev = &pdev->dev;
109 
110         if (np) {
111                 ret = mop500_of_probe(pdev, np);
112                 if (ret)
113                         return ret;
114         }
115 
116         dev_dbg(&pdev->dev, "%s: Card %s: Set platform drvdata.\n",
117                 __func__, mop500_card.name);
118         platform_set_drvdata(pdev, &mop500_card);
119 
120         snd_soc_card_set_drvdata(&mop500_card, NULL);
121 
122         dev_dbg(&pdev->dev, "%s: Card %s: num_links = %d\n",
123                 __func__, mop500_card.name, mop500_card.num_links);
124         dev_dbg(&pdev->dev, "%s: Card %s: DAI-link 0: name = %s\n",
125                 __func__, mop500_card.name, mop500_card.dai_link[0].name);
126         dev_dbg(&pdev->dev, "%s: Card %s: DAI-link 0: stream_name = %s\n",
127                 __func__, mop500_card.name,
128                 mop500_card.dai_link[0].stream_name);
129 
130         ret = snd_soc_register_card(&mop500_card);
131         if (ret)
132                 dev_err(&pdev->dev,
133                         "Error: snd_soc_register_card failed (%d)!\n", ret);
134 
135         return ret;
136 }
137 
138 static int mop500_remove(struct platform_device *pdev)
139 {
140         struct snd_soc_card *mop500_card = platform_get_drvdata(pdev);
141 
142         pr_debug("%s: Enter.\n", __func__);
143 
144         snd_soc_unregister_card(mop500_card);
145         mop500_ab8500_remove(mop500_card);
146         mop500_of_node_put();
147 
148         return 0;
149 }
150 
151 static const struct of_device_id snd_soc_mop500_match[] = {
152         { .compatible = "stericsson,snd-soc-mop500", },
153         {},
154 };
155 
156 static struct platform_driver snd_soc_mop500_driver = {
157         .driver = {
158                 .name = "snd-soc-mop500",
159                 .of_match_table = snd_soc_mop500_match,
160         },
161         .probe = mop500_probe,
162         .remove = mop500_remove,
163 };
164 
165 module_platform_driver(snd_soc_mop500_driver);
166 
167 MODULE_LICENSE("GPL v2");
168 MODULE_DESCRIPTION("ASoC MOP500 board driver");
169 MODULE_AUTHOR("Ola Lilja");
170 

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