556 lines
11 KiB
C
556 lines
11 KiB
C
/* sound/soc/samsung/eax-dai.c
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*
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* Exynos Audio Mixer driver
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*
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* Copyright (c) 2014 Samsung Electronics Co. Ltd.
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* Yeongman Seo <yman.seo@samsung.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include <linux/errno.h>
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/slab.h>
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#include <linux/input.h>
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#include <linux/init.h>
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#include <linux/mm.h>
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#include <linux/serio.h>
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#include <linux/time.h>
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#include <linux/platform_device.h>
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#include <linux/miscdevice.h>
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#include <linux/of.h>
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#include <linux/of_gpio.h>
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#include <linux/clk.h>
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#include <linux/mutex.h>
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#include <linux/vmalloc.h>
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#include <linux/delay.h>
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#include <linux/sched.h>
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#include <linux/io.h>
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#include <linux/irq.h>
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#include <linux/uaccess.h>
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#include <linux/pm_runtime.h>
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#include <linux/iommu.h>
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#include <linux/dma-mapping.h>
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#include <linux/proc_fs.h>
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#include <linux/seq_file.h>
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#include <linux/firmware.h>
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#include <sound/soc.h>
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#include <sound/pcm_params.h>
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#include <sound/exynos.h>
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#include "lpass.h"
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#include "dma.h"
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#include "eax.h"
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#define EAX_CH_MAX 8
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#define EAX_RATES SNDRV_PCM_RATE_8000_192000
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#define EAX_FMTS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S24_LE)
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static struct eax_info {
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struct platform_device *pdev;
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struct mutex mutex;
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spinlock_t lock;
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int ch_max;
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bool master;
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struct snd_soc_dai *master_dai;
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const struct snd_soc_dai_ops *master_dai_ops;
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int (*master_dai_suspend)(struct snd_soc_dai *dai);
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int (*master_dai_resume)(struct snd_soc_dai *dai);
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} ei;
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static LIST_HEAD(ch_list);
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static DECLARE_WAIT_QUEUE_HEAD(eax_wq);
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static int eax_dai_probe(struct snd_soc_dai *dai);
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static int eax_dai_remove(struct snd_soc_dai *dai);
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static int eax_dai_suspend(struct snd_soc_dai *dai);
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static int eax_dai_resume(struct snd_soc_dai *dai);
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static const struct snd_soc_dai_ops eax_dai_ops;
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int eax_dev_register(struct device *dev_master, const char *name,
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struct s3c_dma_params *dma_params, int ch)
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{
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struct ch_info *ci;
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int ret, n;
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if (ch > EAX_CH_MAX) {
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pr_err("%s: Channel error! (max. %d)\n",
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__func__, EAX_CH_MAX);
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return -EINVAL;
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}
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eax_dma_params_register(dma_params);
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for (n = 0; n < ch; n++) {
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ci = kzalloc(sizeof(struct ch_info), GFP_KERNEL);
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if (!ci) {
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pr_err("%s: Memory alloc fails!\n", __func__);
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return -ENOMEM;
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}
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snprintf(ci->name, EAX_NAME_MAX, "samsung-eax.%d", n);
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ci->dev_master = dev_master;
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ci->dma_params = dma_params;
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ci->opened = false;
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ci->running = false;
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ci->ch_id = n;
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ci->dai_drv.name = name;
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ci->dai_drv.symmetric_rates = 1;
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ci->dai_drv.probe = eax_dai_probe;
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ci->dai_drv.remove = eax_dai_remove;
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ci->dai_drv.ops = &eax_dai_ops;
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ci->dai_drv.suspend = eax_dai_suspend;
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ci->dai_drv.resume = eax_dai_resume;
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ci->dai_drv.playback.channels_min = 2;
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ci->dai_drv.playback.channels_max = 2;
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ci->dai_drv.playback.rates = EAX_RATES;
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ci->dai_drv.playback.formats = EAX_FMTS;
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ci->pdev = platform_device_alloc(ci->name, -1);
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if (IS_ERR(ci->pdev)) {
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kfree(ci);
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return -ENODEV;
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}
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ei.ch_max++;
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list_add(&ci->node, &ch_list);
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platform_set_drvdata(ci->pdev, ci);
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ret = platform_device_add(ci->pdev);
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if (ret < 0)
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return -ENODEV;
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}
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return 0;
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}
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int eax_dai_register(struct snd_soc_dai *dai,
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const struct snd_soc_dai_ops *dai_ops,
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int (*dai_suspend)(struct snd_soc_dai *dai),
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int (*dai_resume)(struct snd_soc_dai *dai))
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{
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pr_debug("%s: dai %p, dai_ops %p\n", __func__, dai, dai_ops);
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ei.master = true;
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ei.master_dai = dai;
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ei.master_dai_ops = dai_ops;
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ei.master_dai_suspend = dai_suspend;
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ei.master_dai_resume = dai_resume;
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eax_dma_dai_register(dai);
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return 0;
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}
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int eax_dai_unregister(void)
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{
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ei.master = false;
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ei.master_dai = NULL;
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ei.master_dai_ops = NULL;
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ei.master_dai_suspend = NULL;
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ei.master_dai_resume = NULL;
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eax_dma_dai_unregister();
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return 0;
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}
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static inline struct ch_info *to_info(struct snd_soc_dai *dai)
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{
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return snd_soc_dai_get_drvdata(dai);
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}
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static inline bool eax_dai_any_tx_opened(void)
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{
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struct ch_info *ci;
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list_for_each_entry(ci, &ch_list, node) {
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if (ci->opened)
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return true;
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}
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return false;
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}
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static inline bool eax_dai_any_tx_running(void)
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{
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struct ch_info *ci;
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list_for_each_entry(ci, &ch_list, node) {
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if (ci->running)
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return true;
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}
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return false;
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}
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static int eax_dai_trigger(struct snd_pcm_substream *substream,
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int cmd, struct snd_soc_dai *dai)
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{
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struct ch_info *ci = to_info(dai);
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int ret = 0;
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if (!ei.master)
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return -ENODEV;
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spin_lock(&ei.lock);
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switch (cmd) {
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case SNDRV_PCM_TRIGGER_START:
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if (!eax_dai_any_tx_running())
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ret = (*ei.master_dai_ops->trigger)(substream,
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cmd, ei.master_dai);
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ci->running = true;
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break;
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case SNDRV_PCM_TRIGGER_STOP:
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ci->running = false;
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if (!eax_dai_any_tx_running())
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ret = (*ei.master_dai_ops->trigger)(substream,
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cmd, ei.master_dai);
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break;
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default:
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break;
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}
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spin_unlock(&ei.lock);
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return ret;
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}
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#ifdef CONFIG_SND_SOC_I2S_1840_TDM
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static int eax_dai_set_tdm_slot(struct snd_soc_dai *dai,
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unsigned int tx_mask, unsigned int rx_mask, int slots, int slot_width)
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{
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if (!ei.master)
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return -ENODEV;
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spin_lock(&ei.lock);
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if (eax_dai_any_tx_running()) {
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spin_unlock(&ei.lock);
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return 0;
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}
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spin_unlock(&ei.lock);
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return (*ei.master_dai_ops->set_tdm_slot)(ei.master_dai,
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tx_mask, rx_mask, slots, slot_width);
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}
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#endif
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static int eax_dai_hw_params(struct snd_pcm_substream *substream,
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struct snd_pcm_hw_params *params, struct snd_soc_dai *dai)
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{
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if (!ei.master)
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return -ENODEV;
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spin_lock(&ei.lock);
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if (eax_dai_any_tx_running()) {
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spin_unlock(&ei.lock);
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return 0;
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}
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spin_unlock(&ei.lock);
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return (*ei.master_dai_ops->hw_params)(substream, params,
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ei.master_dai);
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}
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static int eax_dai_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
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{
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if (!ei.master)
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return -ENODEV;
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spin_lock(&ei.lock);
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if (eax_dai_any_tx_running()) {
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spin_unlock(&ei.lock);
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return 0;
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}
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spin_unlock(&ei.lock);
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return (*ei.master_dai_ops->set_fmt)(ei.master_dai, fmt);
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}
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static int eax_dai_set_clkdiv(struct snd_soc_dai *dai, int div_id, int div)
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{
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if (!ei.master)
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return -ENODEV;
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spin_lock(&ei.lock);
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if (eax_dai_any_tx_running()) {
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spin_unlock(&ei.lock);
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return 0;
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}
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spin_unlock(&ei.lock);
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return (*ei.master_dai_ops->set_clkdiv)(ei.master_dai, div_id, div);
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}
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static int eax_dai_set_sysclk(struct snd_soc_dai *dai,
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int clk_id, unsigned int rfs, int dir)
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{
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if (!ei.master)
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return -ENODEV;
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spin_lock(&ei.lock);
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if (eax_dai_any_tx_running()) {
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spin_unlock(&ei.lock);
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return 0;
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}
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spin_unlock(&ei.lock);
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return (*ei.master_dai_ops->set_sysclk)(ei.master_dai,
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clk_id, rfs, dir);
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}
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static int eax_dai_startup(struct snd_pcm_substream *substream,
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struct snd_soc_dai *dai)
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{
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struct ch_info *ci = to_info(dai);
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int ret = 0;
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if (!ei.master)
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return -ENODEV;
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lpass_add_stream();
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mutex_lock(&ei.mutex);
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if (!eax_dai_any_tx_opened())
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ret = (*ei.master_dai_ops->startup)(substream, ei.master_dai);
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ci->opened = true;
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mutex_unlock(&ei.mutex);
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return ret;
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}
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static void eax_dai_shutdown(struct snd_pcm_substream *substream,
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struct snd_soc_dai *dai)
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{
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struct ch_info *ci = to_info(dai);
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if (!ei.master)
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return;
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mutex_lock(&ei.mutex);
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ci->opened = false;
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if (!eax_dai_any_tx_opened())
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(*ei.master_dai_ops->shutdown)(substream, ei.master_dai);
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mutex_unlock(&ei.mutex);
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lpass_remove_stream();
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}
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static int eax_dai_probe(struct snd_soc_dai *dai)
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{
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pr_debug("%s\n", __func__);
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return 0;
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}
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static int eax_dai_remove(struct snd_soc_dai *dai)
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{
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pr_debug("%s\n", __func__);
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return 0;
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}
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static int eax_dai_suspend(struct snd_soc_dai *dai)
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{
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if (dai->active && ei.master_dai_suspend)
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return (*ei.master_dai_suspend)(ei.master_dai);
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return 0;
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}
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static int eax_dai_resume(struct snd_soc_dai *dai)
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{
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if (dai->active && ei.master_dai_resume)
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return (*ei.master_dai_resume)(ei.master_dai);
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return 0;
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}
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static const struct snd_soc_dai_ops eax_dai_ops = {
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.trigger = eax_dai_trigger,
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.hw_params = eax_dai_hw_params,
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.set_fmt = eax_dai_set_fmt,
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.set_clkdiv = eax_dai_set_clkdiv,
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.set_sysclk = eax_dai_set_sysclk,
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#ifdef CONFIG_SND_SOC_I2S_1840_TDM
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.set_tdm_slot = eax_dai_set_tdm_slot,
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#endif
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.startup = eax_dai_startup,
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.shutdown = eax_dai_shutdown,
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};
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static const struct snd_soc_component_driver eax_dai_component = {
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.name = "samsung-eax",
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};
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static int eax_ch_probe(struct platform_device *pdev)
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{
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struct device *dev = &pdev->dev;
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struct ch_info *ci;
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ci = platform_get_drvdata(pdev);
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snd_soc_register_component(dev, &eax_dai_component, &ci->dai_drv, 1);
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eax_asoc_platform_register(dev);
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return 0;
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}
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static int eax_ch_remove(struct platform_device *pdev)
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{
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struct device *dev = &pdev->dev;
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snd_soc_unregister_component(dev);
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return 0;
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}
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static const char banner[] =
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KERN_INFO "Exynos Audio Mixer driver, (c)2014 Samsung Electronics\n";
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static int eax_probe(struct platform_device *pdev)
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{
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struct device *dev = &pdev->dev;
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printk(banner);
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mutex_init(&ei.mutex);
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spin_lock_init(&ei.lock);
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ei.pdev = pdev;
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pm_runtime_enable(dev);
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return 0;
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}
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static int eax_remove(struct platform_device *pdev)
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{
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pm_runtime_disable(&pdev->dev);
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return 0;
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}
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#ifdef CONFIG_PM
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static int eax_runtime_suspend(struct device *dev)
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{
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dev_dbg(dev, "%s entered\n", __func__);
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return 0;
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}
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static int eax_runtime_resume(struct device *dev)
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{
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dev_dbg(dev, "%s entered\n", __func__);
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return 0;
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}
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#endif
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#if !defined(CONFIG_PM) && defined(CONFIG_PM_SLEEP)
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static int eax_suspend(struct device *dev)
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{
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dev_dbg(dev, "%s entered\n", __func__);
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return 0;
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}
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static int eax_resume(struct device *dev)
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{
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dev_dbg(dev, "%s entered\n", __func__);
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return 0;
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}
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#else
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#define eax_suspend NULL
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#define eax_resume NULL
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#endif
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static struct platform_device_id eax_ch_driver_ids[] = {
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{ .name = "samsung-eax.0", },
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{ .name = "samsung-eax.1", },
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{ .name = "samsung-eax.2", },
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{ .name = "samsung-eax.3", },
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{ .name = "samsung-eax.4", },
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{ .name = "samsung-eax.5", },
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{ .name = "samsung-eax.6", },
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{ .name = "samsung-eax.7", },
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{},
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};
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MODULE_DEVICE_TABLE(platform, eax_ch_driver_ids);
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static const struct dev_pm_ops eax_ch_pmops = {
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SET_SYSTEM_SLEEP_PM_OPS(
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eax_suspend,
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eax_resume
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)
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SET_RUNTIME_PM_OPS(
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eax_runtime_suspend,
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eax_runtime_resume,
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NULL
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)
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};
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static struct platform_driver eax_dai_driver = {
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.probe = eax_ch_probe,
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.remove = eax_ch_remove,
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.id_table = eax_ch_driver_ids,
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.driver = {
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.name = "samsung-eax",
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.owner = THIS_MODULE,
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.pm = &eax_ch_pmops,
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},
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};
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module_platform_driver(eax_dai_driver);
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static struct platform_device_id eax_driver_ids[] = {
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{
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.name = "samsung-amixer",
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},
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{},
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};
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MODULE_DEVICE_TABLE(platform, eax_driver_ids);
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#ifdef CONFIG_OF
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static const struct of_device_id exynos_eax_match[] = {
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{
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.compatible = "samsung,exynos-amixer",
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},
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{},
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};
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MODULE_DEVICE_TABLE(of, exynos_eax_match);
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#endif
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static struct platform_driver eax_driver = {
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.probe = eax_probe,
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.remove = eax_remove,
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.id_table = eax_driver_ids,
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.driver = {
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|
.name = "samsung-amixer",
|
|
.owner = THIS_MODULE,
|
|
.of_match_table = of_match_ptr(exynos_eax_match),
|
|
},
|
|
};
|
|
|
|
module_platform_driver(eax_driver);
|
|
|
|
MODULE_AUTHOR("Yeongman Seo <yman.seo@samsung.com>");
|
|
MODULE_DESCRIPTION("Exynos Audio Mixer driver");
|
|
MODULE_LICENSE("GPL");
|