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.
238 lines
6.2 KiB
238 lines
6.2 KiB
// SPDX-License-Identifier: GPL-2.0 |
|
/* |
|
* ASoC Driver for HiFiBerry DAC+ HD |
|
* |
|
* Author: Joerg Schambacher, i2Audio GmbH for HiFiBerry |
|
* Copyright 2020 |
|
* |
|
* This program is free software; you can redistribute it and/or |
|
* modify it under the terms of the GNU General Public License |
|
* version 2 as published by the Free Software Foundation. |
|
* |
|
* This program is distributed in the hope that it will be useful, but |
|
* WITHOUT ANY WARRANTY; without even the implied warranty of |
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
|
* General Public License for more details. |
|
*/ |
|
|
|
#include <linux/module.h> |
|
#include <linux/platform_device.h> |
|
#include <linux/kernel.h> |
|
#include <linux/delay.h> |
|
#include <linux/module.h> |
|
#include <linux/of.h> |
|
#include <linux/delay.h> |
|
#include <linux/gpio.h> |
|
#include <linux/gpio/consumer.h> |
|
#include <sound/core.h> |
|
#include <sound/pcm.h> |
|
#include <sound/pcm_params.h> |
|
#include <sound/soc.h> |
|
#include <linux/i2c.h> |
|
#include <linux/clk.h> |
|
|
|
#include "../codecs/pcm179x.h" |
|
|
|
#define DEFAULT_RATE 44100 |
|
|
|
struct brd_drv_data { |
|
struct regmap *regmap; |
|
struct clk *sclk; |
|
}; |
|
|
|
static struct brd_drv_data drvdata; |
|
static struct gpio_desc *reset_gpio; |
|
static const unsigned int hb_dacplushd_rates[] = { |
|
192000, 96000, 48000, 176400, 88200, 44100, |
|
}; |
|
|
|
static struct snd_pcm_hw_constraint_list hb_dacplushd_constraints = { |
|
.list = hb_dacplushd_rates, |
|
.count = ARRAY_SIZE(hb_dacplushd_rates), |
|
}; |
|
|
|
static int snd_rpi_hb_dacplushd_startup(struct snd_pcm_substream *substream) |
|
{ |
|
/* constraints for standard sample rates */ |
|
snd_pcm_hw_constraint_list(substream->runtime, 0, |
|
SNDRV_PCM_HW_PARAM_RATE, |
|
&hb_dacplushd_constraints); |
|
return 0; |
|
} |
|
|
|
static void snd_rpi_hifiberry_dacplushd_set_sclk( |
|
struct snd_soc_component *component, |
|
int sample_rate) |
|
{ |
|
if (!IS_ERR(drvdata.sclk)) |
|
clk_set_rate(drvdata.sclk, sample_rate); |
|
} |
|
|
|
static int snd_rpi_hifiberry_dacplushd_init(struct snd_soc_pcm_runtime *rtd) |
|
{ |
|
struct snd_soc_dai_link *dai = rtd->dai_link; |
|
struct snd_soc_dai *cpu_dai = asoc_rtd_to_cpu(rtd, 0); |
|
|
|
dai->name = "HiFiBerry DAC+ HD"; |
|
dai->stream_name = "HiFiBerry DAC+ HD HiFi"; |
|
dai->dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
|
| SND_SOC_DAIFMT_CBM_CFM; |
|
|
|
/* allow only fixed 32 clock counts per channel */ |
|
snd_soc_dai_set_bclk_ratio(cpu_dai, 32*2); |
|
|
|
return 0; |
|
} |
|
|
|
static int snd_rpi_hifiberry_dacplushd_hw_params( |
|
struct snd_pcm_substream *substream, struct snd_pcm_hw_params *params) |
|
{ |
|
int ret = 0; |
|
struct snd_soc_pcm_runtime *rtd = substream->private_data; |
|
|
|
struct snd_soc_component *component = asoc_rtd_to_codec(rtd, 0)->component; |
|
|
|
snd_rpi_hifiberry_dacplushd_set_sclk(component, params_rate(params)); |
|
return ret; |
|
} |
|
|
|
/* machine stream operations */ |
|
static struct snd_soc_ops snd_rpi_hifiberry_dacplushd_ops = { |
|
.startup = snd_rpi_hb_dacplushd_startup, |
|
.hw_params = snd_rpi_hifiberry_dacplushd_hw_params, |
|
}; |
|
|
|
SND_SOC_DAILINK_DEFS(hifi, |
|
DAILINK_COMP_ARRAY(COMP_CPU("bcm2708-i2s.0")), |
|
DAILINK_COMP_ARRAY(COMP_CODEC("pcm179x.1-004c", "pcm179x-hifi")), |
|
DAILINK_COMP_ARRAY(COMP_PLATFORM("bcm2708-i2s.0"))); |
|
|
|
|
|
static struct snd_soc_dai_link snd_rpi_hifiberry_dacplushd_dai[] = { |
|
{ |
|
.name = "HiFiBerry DAC+ HD", |
|
.stream_name = "HiFiBerry DAC+ HD HiFi", |
|
.dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF | |
|
SND_SOC_DAIFMT_CBS_CFS, |
|
.ops = &snd_rpi_hifiberry_dacplushd_ops, |
|
.init = snd_rpi_hifiberry_dacplushd_init, |
|
SND_SOC_DAILINK_REG(hifi), |
|
}, |
|
}; |
|
|
|
/* audio machine driver */ |
|
static struct snd_soc_card snd_rpi_hifiberry_dacplushd = { |
|
.name = "snd_rpi_hifiberry_dacplushd", |
|
.driver_name = "HifiberryDacplusHD", |
|
.owner = THIS_MODULE, |
|
.dai_link = snd_rpi_hifiberry_dacplushd_dai, |
|
.num_links = ARRAY_SIZE(snd_rpi_hifiberry_dacplushd_dai), |
|
}; |
|
|
|
static int snd_rpi_hifiberry_dacplushd_probe(struct platform_device *pdev) |
|
{ |
|
int ret = 0; |
|
static int dac_reset_done; |
|
struct device *dev = &pdev->dev; |
|
struct device_node *dev_node = dev->of_node; |
|
|
|
snd_rpi_hifiberry_dacplushd.dev = &pdev->dev; |
|
|
|
/* get GPIO and release DAC from RESET */ |
|
if (!dac_reset_done) { |
|
reset_gpio = gpiod_get(&pdev->dev, "reset", GPIOD_OUT_LOW); |
|
if (IS_ERR(reset_gpio)) { |
|
dev_err(&pdev->dev, "gpiod_get() failed\n"); |
|
return -EINVAL; |
|
} |
|
dac_reset_done = 1; |
|
} |
|
if (!IS_ERR(reset_gpio)) |
|
gpiod_set_value(reset_gpio, 0); |
|
msleep(1); |
|
if (!IS_ERR(reset_gpio)) |
|
gpiod_set_value(reset_gpio, 1); |
|
msleep(1); |
|
if (!IS_ERR(reset_gpio)) |
|
gpiod_set_value(reset_gpio, 0); |
|
|
|
if (pdev->dev.of_node) { |
|
struct device_node *i2s_node; |
|
struct snd_soc_dai_link *dai; |
|
|
|
dai = &snd_rpi_hifiberry_dacplushd_dai[0]; |
|
i2s_node = of_parse_phandle(pdev->dev.of_node, |
|
"i2s-controller", 0); |
|
|
|
if (i2s_node) { |
|
dai->cpus->of_node = i2s_node; |
|
dai->platforms->of_node = i2s_node; |
|
dai->cpus->dai_name = NULL; |
|
dai->platforms->name = NULL; |
|
} else { |
|
return -EPROBE_DEFER; |
|
} |
|
|
|
} |
|
|
|
ret = devm_snd_soc_register_card(&pdev->dev, |
|
&snd_rpi_hifiberry_dacplushd); |
|
if (ret && ret != -EPROBE_DEFER) { |
|
dev_err(&pdev->dev, |
|
"snd_soc_register_card() failed: %d\n", ret); |
|
return ret; |
|
} |
|
if (ret == -EPROBE_DEFER) |
|
return ret; |
|
|
|
dev_set_drvdata(dev, &drvdata); |
|
if (dev_node == NULL) { |
|
dev_err(&pdev->dev, "Device tree node not found\n"); |
|
return -ENODEV; |
|
} |
|
|
|
drvdata.sclk = devm_clk_get(dev, NULL); |
|
if (IS_ERR(drvdata.sclk)) { |
|
drvdata.sclk = ERR_PTR(-ENOENT); |
|
return -ENODEV; |
|
} |
|
|
|
clk_set_rate(drvdata.sclk, DEFAULT_RATE); |
|
|
|
return ret; |
|
} |
|
|
|
static int snd_rpi_hifiberry_dacplushd_remove(struct platform_device *pdev) |
|
{ |
|
if (IS_ERR(reset_gpio)) |
|
return -EINVAL; |
|
|
|
/* put DAC into RESET and release GPIO */ |
|
gpiod_set_value(reset_gpio, 0); |
|
gpiod_put(reset_gpio); |
|
|
|
return 0; |
|
} |
|
|
|
static const struct of_device_id snd_rpi_hifiberry_dacplushd_of_match[] = { |
|
{ .compatible = "hifiberry,hifiberry-dacplushd", }, |
|
{}, |
|
}; |
|
|
|
MODULE_DEVICE_TABLE(of, snd_rpi_hifiberry_dacplushd_of_match); |
|
|
|
static struct platform_driver snd_rpi_hifiberry_dacplushd_driver = { |
|
.driver = { |
|
.name = "snd-rpi-hifiberry-dacplushd", |
|
.owner = THIS_MODULE, |
|
.of_match_table = snd_rpi_hifiberry_dacplushd_of_match, |
|
}, |
|
.probe = snd_rpi_hifiberry_dacplushd_probe, |
|
.remove = snd_rpi_hifiberry_dacplushd_remove, |
|
}; |
|
|
|
module_platform_driver(snd_rpi_hifiberry_dacplushd_driver); |
|
|
|
MODULE_AUTHOR("Joerg Schambacher <[email protected]>"); |
|
MODULE_DESCRIPTION("ASoC Driver for HiFiBerry DAC+ HD"); |
|
MODULE_LICENSE("GPL v2");
|
|
|