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

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

Version: ~ [ linux-5.19-rc3 ] ~ [ linux-5.18.5 ] ~ [ linux-5.17.15 ] ~ [ linux-5.16.20 ] ~ [ linux-5.15.48 ] ~ [ linux-5.14.21 ] ~ [ linux-5.13.19 ] ~ [ linux-5.12.19 ] ~ [ linux-5.11.22 ] ~ [ linux-5.10.123 ] ~ [ linux-5.9.16 ] ~ [ linux-5.8.18 ] ~ [ linux-5.7.19 ] ~ [ linux-5.6.19 ] ~ [ linux-5.5.19 ] ~ [ linux-5.4.199 ] ~ [ linux-5.3.18 ] ~ [ linux-5.2.21 ] ~ [ linux-5.1.21 ] ~ [ linux-5.0.21 ] ~ [ linux-4.20.17 ] ~ [ linux-4.19.248 ] ~ [ linux-4.18.20 ] ~ [ linux-4.17.19 ] ~ [ linux-4.16.18 ] ~ [ linux-4.15.18 ] ~ [ linux-4.14.284 ] ~ [ linux-4.13.16 ] ~ [ linux-4.12.14 ] ~ [ linux-4.11.12 ] ~ [ linux-4.10.17 ] ~ [ linux-4.9.319 ] ~ [ linux-4.8.17 ] ~ [ linux-4.7.10 ] ~ [ linux-4.6.7 ] ~ [ linux-4.5.7 ] ~ [ linux-4.4.302 ] ~ [ linux-4.3.6 ] ~ [ linux-4.2.8 ] ~ [ linux-4.1.52 ] ~ [ linux-4.0.9 ] ~ [ linux-3.10.108 ] ~ [ linux-2.6.32.71 ] ~ [ linux-2.6.0 ] ~ [ linux-2.4.37.11 ] ~ [ unix-v6-master ] ~ [ ccs-tools-1.8.9 ] ~ [ policy-sample ] ~
Architecture: ~ [ i386 ] ~ [ alpha ] ~ [ m68k ] ~ [ mips ] ~ [ ppc ] ~ [ sparc ] ~ [ sparc64 ] ~

  1 /*
  2  * Copyright (c) 2010-2011,2013-2015 The Linux Foundation. All rights reserved.
  3  *
  4  * This program is free software; you can redistribute it and/or modify
  5  * it under the terms of the GNU General Public License version 2 and
  6  * only version 2 as published by the Free Software Foundation.
  7  *
  8  * This program is distributed in the hope that it will be useful,
  9  * but WITHOUT ANY WARRANTY; without even the implied warranty of
 10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 11  * GNU General Public License for more details.
 12  *
 13  * storm.c -- ALSA SoC machine driver for QTi ipq806x-based Storm board
 14  */
 15 
 16 #include <linux/device.h>
 17 #include <linux/module.h>
 18 #include <linux/of.h>
 19 #include <linux/mod_devicetable.h>
 20 #include <linux/platform_device.h>
 21 #include <sound/pcm.h>
 22 #include <sound/pcm_params.h>
 23 #include <sound/soc.h>
 24 
 25 #define STORM_SYSCLK_MULT                       4
 26 
 27 static int storm_ops_hw_params(struct snd_pcm_substream *substream,
 28                 struct snd_pcm_hw_params *params)
 29 {
 30         struct snd_soc_pcm_runtime *soc_runtime = substream->private_data;
 31         struct snd_soc_card *card = soc_runtime->card;
 32         snd_pcm_format_t format = params_format(params);
 33         unsigned int rate = params_rate(params);
 34         unsigned int sysclk_freq;
 35         int bitwidth, ret;
 36 
 37         bitwidth = snd_pcm_format_width(format);
 38         if (bitwidth < 0) {
 39                 dev_err(card->dev, "%s() invalid bit width given: %d\n",
 40                                 __func__, bitwidth);
 41                 return bitwidth;
 42         }
 43 
 44         /*
 45          * as the CPU DAI is the I2S bus master and no system clock is needed by
 46          * the MAX98357a DAC, simply set the system clock to be a constant
 47          * multiple of the bit clock for the clock divider
 48          */
 49         sysclk_freq = rate * bitwidth * 2 * STORM_SYSCLK_MULT;
 50 
 51         ret = snd_soc_dai_set_sysclk(soc_runtime->cpu_dai, 0, sysclk_freq, 0);
 52         if (ret) {
 53                 dev_err(card->dev, "%s() error setting sysclk to %u: %d\n",
 54                                 __func__, sysclk_freq, ret);
 55                 return ret;
 56         }
 57 
 58         return 0;
 59 }
 60 
 61 static struct snd_soc_ops storm_soc_ops = {
 62         .hw_params      = storm_ops_hw_params,
 63 };
 64 
 65 static struct snd_soc_dai_link storm_dai_link = {
 66         .name           = "Primary",
 67         .stream_name    = "Primary",
 68         .codec_dai_name = "HiFi",
 69         .ops            = &storm_soc_ops,
 70 };
 71 
 72 static int storm_parse_of(struct snd_soc_card *card)
 73 {
 74         struct snd_soc_dai_link *dai_link = card->dai_link;
 75         struct device_node *np = card->dev->of_node;
 76 
 77         dai_link->cpu_of_node = of_parse_phandle(np, "cpu", 0);
 78         if (!dai_link->cpu_of_node) {
 79                 dev_err(card->dev, "%s() error getting cpu phandle\n",
 80                                 __func__);
 81                 return -EINVAL;
 82         }
 83         dai_link->platform_of_node = dai_link->cpu_of_node;
 84 
 85         dai_link->codec_of_node = of_parse_phandle(np, "codec", 0);
 86         if (!dai_link->codec_of_node) {
 87                 dev_err(card->dev, "%s() error getting codec phandle\n",
 88                                 __func__);
 89                 return -EINVAL;
 90         }
 91 
 92         return 0;
 93 }
 94 
 95 static int storm_platform_probe(struct platform_device *pdev)
 96 {
 97         struct snd_soc_card *card;
 98         int ret;
 99 
100         card = devm_kzalloc(&pdev->dev, sizeof(*card), GFP_KERNEL);
101         if (!card)
102                 return -ENOMEM;
103 
104         card->dev = &pdev->dev;
105         platform_set_drvdata(pdev, card);
106 
107         ret = snd_soc_of_parse_card_name(card, "qcom,model");
108         if (ret) {
109                 dev_err(&pdev->dev, "%s() error parsing card name: %d\n",
110                                 __func__, ret);
111                 return ret;
112         }
113 
114         card->dai_link  = &storm_dai_link;
115         card->num_links = 1;
116 
117         ret = storm_parse_of(card);
118         if (ret) {
119                 dev_err(&pdev->dev, "%s() error resolving dai links: %d\n",
120                                 __func__, ret);
121                 return ret;
122         }
123 
124         ret = devm_snd_soc_register_card(&pdev->dev, card);
125         if (ret)
126                 dev_err(&pdev->dev, "%s() error registering soundcard: %d\n",
127                                 __func__, ret);
128 
129         return ret;
130 
131 }
132 
133 #ifdef CONFIG_OF
134 static const struct of_device_id storm_device_id[]  = {
135         { .compatible = "google,storm-audio" },
136         {},
137 };
138 MODULE_DEVICE_TABLE(of, storm_device_id);
139 #endif
140 
141 static struct platform_driver storm_platform_driver = {
142         .driver = {
143                 .name = "storm-audio",
144                 .of_match_table =
145                         of_match_ptr(storm_device_id),
146         },
147         .probe = storm_platform_probe,
148 };
149 module_platform_driver(storm_platform_driver);
150 
151 MODULE_DESCRIPTION("QTi IPQ806x-based Storm Machine Driver");
152 MODULE_LICENSE("GPL v2");
153 

~ [ 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