mirror of https://github.com/Qortal/Brooklyn
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
143 lines
3.5 KiB
143 lines
3.5 KiB
// SPDX-License-Identifier: GPL-2.0-only |
|
/* |
|
* Copyright (c) 2010-2011,2013-2015 The Linux Foundation. All rights reserved. |
|
* |
|
* storm.c -- ALSA SoC machine driver for QTi ipq806x-based Storm board |
|
*/ |
|
|
|
#include <linux/device.h> |
|
#include <linux/module.h> |
|
#include <linux/of.h> |
|
#include <linux/mod_devicetable.h> |
|
#include <linux/platform_device.h> |
|
#include <sound/pcm.h> |
|
#include <sound/pcm_params.h> |
|
#include <sound/soc.h> |
|
|
|
#define STORM_SYSCLK_MULT 4 |
|
|
|
static int storm_ops_hw_params(struct snd_pcm_substream *substream, |
|
struct snd_pcm_hw_params *params) |
|
{ |
|
struct snd_soc_pcm_runtime *soc_runtime = asoc_substream_to_rtd(substream); |
|
struct snd_soc_card *card = soc_runtime->card; |
|
snd_pcm_format_t format = params_format(params); |
|
unsigned int rate = params_rate(params); |
|
unsigned int sysclk_freq; |
|
int bitwidth, ret; |
|
|
|
bitwidth = snd_pcm_format_width(format); |
|
if (bitwidth < 0) { |
|
dev_err(card->dev, "invalid bit width given: %d\n", bitwidth); |
|
return bitwidth; |
|
} |
|
|
|
/* |
|
* as the CPU DAI is the I2S bus master and no system clock is needed by |
|
* the MAX98357a DAC, simply set the system clock to be a constant |
|
* multiple of the bit clock for the clock divider |
|
*/ |
|
sysclk_freq = rate * bitwidth * 2 * STORM_SYSCLK_MULT; |
|
|
|
ret = snd_soc_dai_set_sysclk(asoc_rtd_to_cpu(soc_runtime, 0), 0, sysclk_freq, 0); |
|
if (ret) { |
|
dev_err(card->dev, "error setting sysclk to %u: %d\n", |
|
sysclk_freq, ret); |
|
return ret; |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
static const struct snd_soc_ops storm_soc_ops = { |
|
.hw_params = storm_ops_hw_params, |
|
}; |
|
|
|
SND_SOC_DAILINK_DEFS(hifi, |
|
DAILINK_COMP_ARRAY(COMP_EMPTY()), |
|
DAILINK_COMP_ARRAY(COMP_CODEC(NULL, "HiFi")), |
|
DAILINK_COMP_ARRAY(COMP_EMPTY())); |
|
|
|
static struct snd_soc_dai_link storm_dai_link = { |
|
.name = "Primary", |
|
.stream_name = "Primary", |
|
.ops = &storm_soc_ops, |
|
SND_SOC_DAILINK_REG(hifi), |
|
}; |
|
|
|
static int storm_parse_of(struct snd_soc_card *card) |
|
{ |
|
struct snd_soc_dai_link *dai_link = card->dai_link; |
|
struct device_node *np = card->dev->of_node; |
|
|
|
dai_link->cpus->of_node = of_parse_phandle(np, "cpu", 0); |
|
if (!dai_link->cpus->of_node) { |
|
dev_err(card->dev, "error getting cpu phandle\n"); |
|
return -EINVAL; |
|
} |
|
dai_link->platforms->of_node = dai_link->cpus->of_node; |
|
|
|
dai_link->codecs->of_node = of_parse_phandle(np, "codec", 0); |
|
if (!dai_link->codecs->of_node) { |
|
dev_err(card->dev, "error getting codec phandle\n"); |
|
return -EINVAL; |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
static int storm_platform_probe(struct platform_device *pdev) |
|
{ |
|
struct snd_soc_card *card; |
|
int ret; |
|
|
|
card = devm_kzalloc(&pdev->dev, sizeof(*card), GFP_KERNEL); |
|
if (!card) |
|
return -ENOMEM; |
|
|
|
card->dev = &pdev->dev; |
|
card->owner = THIS_MODULE; |
|
|
|
ret = snd_soc_of_parse_card_name(card, "qcom,model"); |
|
if (ret) { |
|
dev_err(&pdev->dev, "error parsing card name: %d\n", ret); |
|
return ret; |
|
} |
|
|
|
card->dai_link = &storm_dai_link; |
|
card->num_links = 1; |
|
|
|
ret = storm_parse_of(card); |
|
if (ret) { |
|
dev_err(&pdev->dev, "error resolving dai links: %d\n", ret); |
|
return ret; |
|
} |
|
|
|
ret = devm_snd_soc_register_card(&pdev->dev, card); |
|
if (ret) |
|
dev_err(&pdev->dev, "error registering soundcard: %d\n", ret); |
|
|
|
return ret; |
|
|
|
} |
|
|
|
#ifdef CONFIG_OF |
|
static const struct of_device_id storm_device_id[] = { |
|
{ .compatible = "google,storm-audio" }, |
|
{}, |
|
}; |
|
MODULE_DEVICE_TABLE(of, storm_device_id); |
|
#endif |
|
|
|
static struct platform_driver storm_platform_driver = { |
|
.driver = { |
|
.name = "storm-audio", |
|
.of_match_table = |
|
of_match_ptr(storm_device_id), |
|
}, |
|
.probe = storm_platform_probe, |
|
}; |
|
module_platform_driver(storm_platform_driver); |
|
|
|
MODULE_DESCRIPTION("QTi IPQ806x-based Storm Machine Driver"); |
|
MODULE_LICENSE("GPL v2");
|
|
|