~ [ source navigation ] ~ [ diff markup ] ~ [ identifier search ] ~

TOMOYO Linux Cross Reference
Linux/sound/soc/qcom/storm.c

Version: ~ [ linux-5.15-rc6 ] ~ [ linux-5.14.14 ] ~ [ linux-5.13.19 ] ~ [ linux-5.12.19 ] ~ [ linux-5.11.22 ] ~ [ linux-5.10.75 ] ~ [ linux-5.9.16 ] ~ [ linux-5.8.18 ] ~ [ linux-5.7.19 ] ~ [ linux-5.6.19 ] ~ [ linux-5.5.19 ] ~ [ linux-5.4.155 ] ~ [ linux-5.3.18 ] ~ [ linux-5.2.21 ] ~ [ linux-5.1.21 ] ~ [ linux-5.0.21 ] ~ [ linux-4.20.17 ] ~ [ linux-4.19.213 ] ~ [ linux-4.18.20 ] ~ [ linux-4.17.19 ] ~ [ linux-4.16.18 ] ~ [ linux-4.15.18 ] ~ [ linux-4.14.252 ] ~ [ linux-4.13.16 ] ~ [ linux-4.12.14 ] ~ [ linux-4.11.12 ] ~ [ linux-4.10.17 ] ~ [ linux-4.9.287 ] ~ [ linux-4.8.17 ] ~ [ linux-4.7.10 ] ~ [ linux-4.6.7 ] ~ [ linux-4.5.7 ] ~ [ linux-4.4.289 ] ~ [ linux-4.3.6 ] ~ [ linux-4.2.8 ] ~ [ linux-4.1.52 ] ~ [ linux-4.0.9 ] ~ [ linux-3.18.140 ] ~ [ linux-3.16.85 ] ~ [ linux-3.14.79 ] ~ [ linux-3.12.74 ] ~ [ linux-3.10.108 ] ~ [ linux-2.6.32.71 ] ~ [ linux-2.6.0 ] ~ [ linux-2.4.37.11 ] ~ [ unix-v6-master ] ~ [ ccs-tools-1.8.5 ] ~ [ policy-sample ] ~
Architecture: ~ [ i386 ] ~ [ alpha ] ~ [ m68k ] ~ [ mips ] ~ [ ppc ] ~ [ sparc ] ~ [ sparc64 ] ~

  1 // SPDX-License-Identifier: GPL-2.0-only
  2 /*
  3  * Copyright (c) 2010-2011,2013-2015 The Linux Foundation. All rights reserved.
  4  *
  5  * storm.c -- ALSA SoC machine driver for QTi ipq806x-based Storm board
  6  */
  7 
  8 #include <linux/device.h>
  9 #include <linux/module.h>
 10 #include <linux/of.h>
 11 #include <linux/mod_devicetable.h>
 12 #include <linux/platform_device.h>
 13 #include <sound/pcm.h>
 14 #include <sound/pcm_params.h>
 15 #include <sound/soc.h>
 16 
 17 #define STORM_SYSCLK_MULT                       4
 18 
 19 static int storm_ops_hw_params(struct snd_pcm_substream *substream,
 20                 struct snd_pcm_hw_params *params)
 21 {
 22         struct snd_soc_pcm_runtime *soc_runtime = substream->private_data;
 23         struct snd_soc_card *card = soc_runtime->card;
 24         snd_pcm_format_t format = params_format(params);
 25         unsigned int rate = params_rate(params);
 26         unsigned int sysclk_freq;
 27         int bitwidth, ret;
 28 
 29         bitwidth = snd_pcm_format_width(format);
 30         if (bitwidth < 0) {
 31                 dev_err(card->dev, "invalid bit width given: %d\n", bitwidth);
 32                 return bitwidth;
 33         }
 34 
 35         /*
 36          * as the CPU DAI is the I2S bus master and no system clock is needed by
 37          * the MAX98357a DAC, simply set the system clock to be a constant
 38          * multiple of the bit clock for the clock divider
 39          */
 40         sysclk_freq = rate * bitwidth * 2 * STORM_SYSCLK_MULT;
 41 
 42         ret = snd_soc_dai_set_sysclk(soc_runtime->cpu_dai, 0, sysclk_freq, 0);
 43         if (ret) {
 44                 dev_err(card->dev, "error setting sysclk to %u: %d\n",
 45                         sysclk_freq, ret);
 46                 return ret;
 47         }
 48 
 49         return 0;
 50 }
 51 
 52 static const struct snd_soc_ops storm_soc_ops = {
 53         .hw_params      = storm_ops_hw_params,
 54 };
 55 
 56 SND_SOC_DAILINK_DEFS(hifi,
 57         DAILINK_COMP_ARRAY(COMP_EMPTY()),
 58         DAILINK_COMP_ARRAY(COMP_CODEC(NULL, "HiFi")),
 59         DAILINK_COMP_ARRAY(COMP_EMPTY()));
 60 
 61 static struct snd_soc_dai_link storm_dai_link = {
 62         .name           = "Primary",
 63         .stream_name    = "Primary",
 64         .ops            = &storm_soc_ops,
 65         SND_SOC_DAILINK_REG(hifi),
 66 };
 67 
 68 static int storm_parse_of(struct snd_soc_card *card)
 69 {
 70         struct snd_soc_dai_link *dai_link = card->dai_link;
 71         struct device_node *np = card->dev->of_node;
 72 
 73         dai_link->cpus->of_node = of_parse_phandle(np, "cpu", 0);
 74         if (!dai_link->cpus->of_node) {
 75                 dev_err(card->dev, "error getting cpu phandle\n");
 76                 return -EINVAL;
 77         }
 78         dai_link->platforms->of_node = dai_link->cpus->of_node;
 79 
 80         dai_link->codecs->of_node = of_parse_phandle(np, "codec", 0);
 81         if (!dai_link->codecs->of_node) {
 82                 dev_err(card->dev, "error getting codec phandle\n");
 83                 return -EINVAL;
 84         }
 85 
 86         return 0;
 87 }
 88 
 89 static int storm_platform_probe(struct platform_device *pdev)
 90 {
 91         struct snd_soc_card *card;
 92         int ret;
 93 
 94         card = devm_kzalloc(&pdev->dev, sizeof(*card), GFP_KERNEL);
 95         if (!card)
 96                 return -ENOMEM;
 97 
 98         card->dev = &pdev->dev;
 99 
100         ret = snd_soc_of_parse_card_name(card, "qcom,model");
101         if (ret) {
102                 dev_err(&pdev->dev, "error parsing card name: %d\n", ret);
103                 return ret;
104         }
105 
106         card->dai_link  = &storm_dai_link;
107         card->num_links = 1;
108 
109         ret = storm_parse_of(card);
110         if (ret) {
111                 dev_err(&pdev->dev, "error resolving dai links: %d\n", ret);
112                 return ret;
113         }
114 
115         ret = devm_snd_soc_register_card(&pdev->dev, card);
116         if (ret)
117                 dev_err(&pdev->dev, "error registering soundcard: %d\n", ret);
118 
119         return ret;
120 
121 }
122 
123 #ifdef CONFIG_OF
124 static const struct of_device_id storm_device_id[]  = {
125         { .compatible = "google,storm-audio" },
126         {},
127 };
128 MODULE_DEVICE_TABLE(of, storm_device_id);
129 #endif
130 
131 static struct platform_driver storm_platform_driver = {
132         .driver = {
133                 .name = "storm-audio",
134                 .of_match_table =
135                         of_match_ptr(storm_device_id),
136         },
137         .probe = storm_platform_probe,
138 };
139 module_platform_driver(storm_platform_driver);
140 
141 MODULE_DESCRIPTION("QTi IPQ806x-based Storm Machine Driver");
142 MODULE_LICENSE("GPL v2");
143 

~ [ source navigation ] ~ [ diff markup ] ~ [ identifier search ] ~

kernel.org | git.kernel.org | LWN.net | Project Home | Wiki (Japanese) | Wiki (English) | SVN repository | Mail admin

Linux® is a registered trademark of Linus Torvalds in the United States and other countries.
TOMOYO® is a registered trademark of NTT DATA CORPORATION.

osdn.jp