From 9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 Mon Sep 17 00:00:00 2001 From: Yunhong Jiang Date: Tue, 4 Aug 2015 12:17:53 -0700 Subject: Add the rt linux 4.1.3-rt3 as base Import the rt linux 4.1.3-rt3 as OPNFV kvm base. It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and the base is: commit 0917f823c59692d751951bf5ea699a2d1e2f26a2 Author: Sebastian Andrzej Siewior Date: Sat Jul 25 12:13:34 2015 +0200 Prepare v4.1.3-rt3 Signed-off-by: Sebastian Andrzej Siewior We lose all the git history this way and it's not good. We should apply another opnfv project repo in future. Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423 Signed-off-by: Yunhong Jiang --- kernel/sound/soc/qcom/storm.c | 162 ++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 162 insertions(+) create mode 100644 kernel/sound/soc/qcom/storm.c (limited to 'kernel/sound/soc/qcom/storm.c') diff --git a/kernel/sound/soc/qcom/storm.c b/kernel/sound/soc/qcom/storm.c new file mode 100644 index 000000000..b8bd29619 --- /dev/null +++ b/kernel/sound/soc/qcom/storm.c @@ -0,0 +1,162 @@ +/* + * Copyright (c) 2010-2011,2013-2015 The Linux Foundation. All rights reserved. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 and + * only 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. + * + * storm.c -- ALSA SoC machine driver for QTi ipq806x-based Storm board + */ + +#include +#include +#include +#include +#include +#include +#include +#include + +#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 = substream->private_data; + 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, "%s() invalid bit width given: %d\n", + __func__, 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(soc_runtime->cpu_dai, 0, sysclk_freq, 0); + if (ret) { + dev_err(card->dev, "%s() error setting sysclk to %u: %d\n", + __func__, sysclk_freq, ret); + return ret; + } + + return 0; +} + +static struct snd_soc_ops storm_soc_ops = { + .hw_params = storm_ops_hw_params, +}; + +static struct snd_soc_dai_link storm_dai_link = { + .name = "Primary", + .stream_name = "Primary", + .codec_dai_name = "HiFi", + .ops = &storm_soc_ops, +}; + +static struct snd_soc_card storm_soc_card = { + .name = "ipq806x-storm", + .dev = NULL, +}; + +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->cpu_of_node = of_parse_phandle(np, "cpu", 0); + if (!dai_link->cpu_of_node) { + dev_err(card->dev, "%s() error getting cpu phandle\n", + __func__); + return -EINVAL; + } + dai_link->platform_of_node = dai_link->cpu_of_node; + + dai_link->codec_of_node = of_parse_phandle(np, "codec", 0); + if (!dai_link->codec_of_node) { + dev_err(card->dev, "%s() error getting codec phandle\n", + __func__); + return -EINVAL; + } + + return 0; +} + +static int storm_platform_probe(struct platform_device *pdev) +{ + struct snd_soc_card *card = &storm_soc_card; + int ret; + + if (card->dev) { + dev_err(&pdev->dev, "%s() error, existing soundcard\n", + __func__); + return -ENODEV; + } + card->dev = &pdev->dev; + platform_set_drvdata(pdev, card); + + ret = snd_soc_of_parse_card_name(card, "qcom,model"); + if (ret) { + dev_err(&pdev->dev, "%s() error parsing card name: %d\n", + __func__, ret); + return ret; + } + + card->dai_link = &storm_dai_link; + card->num_links = 1; + + ret = storm_parse_of(card); + if (ret) { + dev_err(&pdev->dev, "%s() error resolving dai links: %d\n", + __func__, ret); + return ret; + } + + ret = devm_snd_soc_register_card(&pdev->dev, card); + if (ret == -EPROBE_DEFER) { + card->dev = NULL; + return ret; + } else if (ret) { + dev_err(&pdev->dev, "%s() error registering soundcard: %d\n", + __func__, ret); + return ret; + } + + return 0; +} + +#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"); -- cgit 1.2.3-korg