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Diffstat (limited to 'sound/soc/dwc/designware_i2s.c')
-rw-r--r--sound/soc/dwc/designware_i2s.c464
1 files changed, 0 insertions, 464 deletions
diff --git a/sound/soc/dwc/designware_i2s.c b/sound/soc/dwc/designware_i2s.c
deleted file mode 100644
index 70eb37a5dd16..000000000000
--- a/sound/soc/dwc/designware_i2s.c
+++ /dev/null
@@ -1,464 +0,0 @@
-/*
- * ALSA SoC Synopsys I2S Audio Layer
- *
- * sound/soc/dwc/designware_i2s.c
- *
- * Copyright (C) 2010 ST Microelectronics
- * Rajeev Kumar <rajeev-dlh.kumar@st.com>
- *
- * This file is licensed under the terms of the GNU General Public
- * License version 2. This program is licensed "as is" without any
- * warranty of any kind, whether express or implied.
- */
-
-#include <linux/clk.h>
-#include <linux/device.h>
-#include <linux/init.h>
-#include <linux/io.h>
-#include <linux/interrupt.h>
-#include <linux/module.h>
-#include <linux/slab.h>
-#include <sound/designware_i2s.h>
-#include <sound/pcm.h>
-#include <sound/pcm_params.h>
-#include <sound/soc.h>
-
-/* common register for all channel */
-#define IER 0x000
-#define IRER 0x004
-#define ITER 0x008
-#define CER 0x00C
-#define CCR 0x010
-#define RXFFR 0x014
-#define TXFFR 0x018
-
-/* I2STxRxRegisters for all channels */
-#define LRBR_LTHR(x) (0x40 * x + 0x020)
-#define RRBR_RTHR(x) (0x40 * x + 0x024)
-#define RER(x) (0x40 * x + 0x028)
-#define TER(x) (0x40 * x + 0x02C)
-#define RCR(x) (0x40 * x + 0x030)
-#define TCR(x) (0x40 * x + 0x034)
-#define ISR(x) (0x40 * x + 0x038)
-#define IMR(x) (0x40 * x + 0x03C)
-#define ROR(x) (0x40 * x + 0x040)
-#define TOR(x) (0x40 * x + 0x044)
-#define RFCR(x) (0x40 * x + 0x048)
-#define TFCR(x) (0x40 * x + 0x04C)
-#define RFF(x) (0x40 * x + 0x050)
-#define TFF(x) (0x40 * x + 0x054)
-
-/* I2SCOMPRegisters */
-#define I2S_COMP_PARAM_2 0x01F0
-#define I2S_COMP_PARAM_1 0x01F4
-#define I2S_COMP_VERSION 0x01F8
-#define I2S_COMP_TYPE 0x01FC
-
-#define MAX_CHANNEL_NUM 8
-#define MIN_CHANNEL_NUM 2
-
-struct dw_i2s_dev {
- void __iomem *i2s_base;
- struct clk *clk;
- int active;
- unsigned int capability;
- struct device *dev;
-
- /* data related to DMA transfers b/w i2s and DMAC */
- struct i2s_dma_data play_dma_data;
- struct i2s_dma_data capture_dma_data;
- struct i2s_clk_config_data config;
- int (*i2s_clk_cfg)(struct i2s_clk_config_data *config);
-};
-
-static inline void i2s_write_reg(void __iomem *io_base, int reg, u32 val)
-{
- writel(val, io_base + reg);
-}
-
-static inline u32 i2s_read_reg(void __iomem *io_base, int reg)
-{
- return readl(io_base + reg);
-}
-
-static inline void i2s_disable_channels(struct dw_i2s_dev *dev, u32 stream)
-{
- u32 i = 0;
-
- if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
- for (i = 0; i < 4; i++)
- i2s_write_reg(dev->i2s_base, TER(i), 0);
- } else {
- for (i = 0; i < 4; i++)
- i2s_write_reg(dev->i2s_base, RER(i), 0);
- }
-}
-
-static inline void i2s_clear_irqs(struct dw_i2s_dev *dev, u32 stream)
-{
- u32 i = 0;
-
- if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
- for (i = 0; i < 4; i++)
- i2s_write_reg(dev->i2s_base, TOR(i), 0);
- } else {
- for (i = 0; i < 4; i++)
- i2s_write_reg(dev->i2s_base, ROR(i), 0);
- }
-}
-
-static void i2s_start(struct dw_i2s_dev *dev,
- struct snd_pcm_substream *substream)
-{
-
- i2s_write_reg(dev->i2s_base, IER, 1);
-
- if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
- i2s_write_reg(dev->i2s_base, ITER, 1);
- else
- i2s_write_reg(dev->i2s_base, IRER, 1);
-
- i2s_write_reg(dev->i2s_base, CER, 1);
-}
-
-static void i2s_stop(struct dw_i2s_dev *dev,
- struct snd_pcm_substream *substream)
-{
- u32 i = 0, irq;
-
- i2s_clear_irqs(dev, substream->stream);
- if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
- i2s_write_reg(dev->i2s_base, ITER, 0);
-
- for (i = 0; i < 4; i++) {
- irq = i2s_read_reg(dev->i2s_base, IMR(i));
- i2s_write_reg(dev->i2s_base, IMR(i), irq | 0x30);
- }
- } else {
- i2s_write_reg(dev->i2s_base, IRER, 0);
-
- for (i = 0; i < 4; i++) {
- irq = i2s_read_reg(dev->i2s_base, IMR(i));
- i2s_write_reg(dev->i2s_base, IMR(i), irq | 0x03);
- }
- }
-
- if (!dev->active) {
- i2s_write_reg(dev->i2s_base, CER, 0);
- i2s_write_reg(dev->i2s_base, IER, 0);
- }
-}
-
-static int dw_i2s_startup(struct snd_pcm_substream *substream,
- struct snd_soc_dai *cpu_dai)
-{
- struct dw_i2s_dev *dev = snd_soc_dai_get_drvdata(cpu_dai);
- struct i2s_dma_data *dma_data = NULL;
-
- if (!(dev->capability & DWC_I2S_RECORD) &&
- (substream->stream == SNDRV_PCM_STREAM_CAPTURE))
- return -EINVAL;
-
- if (!(dev->capability & DWC_I2S_PLAY) &&
- (substream->stream == SNDRV_PCM_STREAM_PLAYBACK))
- return -EINVAL;
-
- if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
- dma_data = &dev->play_dma_data;
- else if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
- dma_data = &dev->capture_dma_data;
-
- snd_soc_dai_set_dma_data(cpu_dai, substream, (void *)dma_data);
-
- return 0;
-}
-
-static int dw_i2s_hw_params(struct snd_pcm_substream *substream,
- struct snd_pcm_hw_params *params, struct snd_soc_dai *dai)
-{
- struct dw_i2s_dev *dev = snd_soc_dai_get_drvdata(dai);
- struct i2s_clk_config_data *config = &dev->config;
- u32 ccr, xfer_resolution, ch_reg, irq;
- int ret;
-
- switch (params_format(params)) {
- case SNDRV_PCM_FORMAT_S16_LE:
- config->data_width = 16;
- ccr = 0x00;
- xfer_resolution = 0x02;
- break;
-
- case SNDRV_PCM_FORMAT_S24_LE:
- config->data_width = 24;
- ccr = 0x08;
- xfer_resolution = 0x04;
- break;
-
- case SNDRV_PCM_FORMAT_S32_LE:
- config->data_width = 32;
- ccr = 0x10;
- xfer_resolution = 0x05;
- break;
-
- default:
- dev_err(dev->dev, "designware-i2s: unsuppted PCM fmt");
- return -EINVAL;
- }
-
- config->chan_nr = params_channels(params);
-
- switch (config->chan_nr) {
- case EIGHT_CHANNEL_SUPPORT:
- ch_reg = 3;
- break;
- case SIX_CHANNEL_SUPPORT:
- ch_reg = 2;
- break;
- case FOUR_CHANNEL_SUPPORT:
- ch_reg = 1;
- break;
- case TWO_CHANNEL_SUPPORT:
- ch_reg = 0;
- break;
- default:
- dev_err(dev->dev, "channel not supported\n");
- return -EINVAL;
- }
-
- i2s_disable_channels(dev, substream->stream);
-
- if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
- i2s_write_reg(dev->i2s_base, TCR(ch_reg), xfer_resolution);
- i2s_write_reg(dev->i2s_base, TFCR(ch_reg), 0x02);
- irq = i2s_read_reg(dev->i2s_base, IMR(ch_reg));
- i2s_write_reg(dev->i2s_base, IMR(ch_reg), irq & ~0x30);
- i2s_write_reg(dev->i2s_base, TER(ch_reg), 1);
- } else {
- i2s_write_reg(dev->i2s_base, RCR(ch_reg), xfer_resolution);
- i2s_write_reg(dev->i2s_base, RFCR(ch_reg), 0x07);
- irq = i2s_read_reg(dev->i2s_base, IMR(ch_reg));
- i2s_write_reg(dev->i2s_base, IMR(ch_reg), irq & ~0x03);
- i2s_write_reg(dev->i2s_base, RER(ch_reg), 1);
- }
-
- i2s_write_reg(dev->i2s_base, CCR, ccr);
-
- config->sample_rate = params_rate(params);
-
- if (!dev->i2s_clk_cfg)
- return -EINVAL;
-
- ret = dev->i2s_clk_cfg(config);
- if (ret < 0) {
- dev_err(dev->dev, "runtime audio clk config fail\n");
- return ret;
- }
-
- return 0;
-}
-
-static void dw_i2s_shutdown(struct snd_pcm_substream *substream,
- struct snd_soc_dai *dai)
-{
- snd_soc_dai_set_dma_data(dai, substream, NULL);
-}
-
-static int dw_i2s_trigger(struct snd_pcm_substream *substream,
- int cmd, struct snd_soc_dai *dai)
-{
- struct dw_i2s_dev *dev = snd_soc_dai_get_drvdata(dai);
- int ret = 0;
-
- switch (cmd) {
- case SNDRV_PCM_TRIGGER_START:
- case SNDRV_PCM_TRIGGER_RESUME:
- case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
- dev->active++;
- i2s_start(dev, substream);
- break;
-
- case SNDRV_PCM_TRIGGER_STOP:
- case SNDRV_PCM_TRIGGER_SUSPEND:
- case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
- dev->active--;
- i2s_stop(dev, substream);
- break;
- default:
- ret = -EINVAL;
- break;
- }
- return ret;
-}
-
-static struct snd_soc_dai_ops dw_i2s_dai_ops = {
- .startup = dw_i2s_startup,
- .shutdown = dw_i2s_shutdown,
- .hw_params = dw_i2s_hw_params,
- .trigger = dw_i2s_trigger,
-};
-
-static const struct snd_soc_component_driver dw_i2s_component = {
- .name = "dw-i2s",
-};
-
-#ifdef CONFIG_PM
-
-static int dw_i2s_suspend(struct snd_soc_dai *dai)
-{
- struct dw_i2s_dev *dev = snd_soc_dai_get_drvdata(dai);
-
- clk_disable(dev->clk);
- return 0;
-}
-
-static int dw_i2s_resume(struct snd_soc_dai *dai)
-{
- struct dw_i2s_dev *dev = snd_soc_dai_get_drvdata(dai);
-
- clk_enable(dev->clk);
- return 0;
-}
-
-#else
-#define dw_i2s_suspend NULL
-#define dw_i2s_resume NULL
-#endif
-
-static int dw_i2s_probe(struct platform_device *pdev)
-{
- const struct i2s_platform_data *pdata = pdev->dev.platform_data;
- struct dw_i2s_dev *dev;
- struct resource *res;
- int ret;
- unsigned int cap;
- struct snd_soc_dai_driver *dw_i2s_dai;
-
- if (!pdata) {
- dev_err(&pdev->dev, "Invalid platform data\n");
- return -EINVAL;
- }
-
- res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
- if (!res) {
- dev_err(&pdev->dev, "no i2s resource defined\n");
- return -ENODEV;
- }
-
- if (!devm_request_mem_region(&pdev->dev, res->start,
- resource_size(res), pdev->name)) {
- dev_err(&pdev->dev, "i2s region already claimed\n");
- return -EBUSY;
- }
-
- dev = devm_kzalloc(&pdev->dev, sizeof(*dev), GFP_KERNEL);
- if (!dev) {
- dev_warn(&pdev->dev, "kzalloc fail\n");
- return -ENOMEM;
- }
-
- dev->i2s_base = devm_ioremap(&pdev->dev, res->start,
- resource_size(res));
- if (!dev->i2s_base) {
- dev_err(&pdev->dev, "ioremap fail for i2s_region\n");
- return -ENOMEM;
- }
-
- cap = pdata->cap;
- dev->capability = cap;
- dev->i2s_clk_cfg = pdata->i2s_clk_cfg;
-
- /* Set DMA slaves info */
-
- dev->play_dma_data.data = pdata->play_dma_data;
- dev->capture_dma_data.data = pdata->capture_dma_data;
- dev->play_dma_data.addr = res->start + I2S_TXDMA;
- dev->capture_dma_data.addr = res->start + I2S_RXDMA;
- dev->play_dma_data.max_burst = 16;
- dev->capture_dma_data.max_burst = 16;
- dev->play_dma_data.addr_width = DMA_SLAVE_BUSWIDTH_2_BYTES;
- dev->capture_dma_data.addr_width = DMA_SLAVE_BUSWIDTH_2_BYTES;
- dev->play_dma_data.filter = pdata->filter;
- dev->capture_dma_data.filter = pdata->filter;
-
- dev->clk = clk_get(&pdev->dev, NULL);
- if (IS_ERR(dev->clk))
- return PTR_ERR(dev->clk);
-
- ret = clk_enable(dev->clk);
- if (ret < 0)
- goto err_clk_put;
-
- dw_i2s_dai = devm_kzalloc(&pdev->dev, sizeof(*dw_i2s_dai), GFP_KERNEL);
- if (!dw_i2s_dai) {
- dev_err(&pdev->dev, "mem allocation failed for dai driver\n");
- ret = -ENOMEM;
- goto err_clk_disable;
- }
-
- if (cap & DWC_I2S_PLAY) {
- dev_dbg(&pdev->dev, " designware: play supported\n");
- dw_i2s_dai->playback.channels_min = MIN_CHANNEL_NUM;
- dw_i2s_dai->playback.channels_max = pdata->channel;
- dw_i2s_dai->playback.formats = pdata->snd_fmts;
- dw_i2s_dai->playback.rates = pdata->snd_rates;
- }
-
- if (cap & DWC_I2S_RECORD) {
- dev_dbg(&pdev->dev, "designware: record supported\n");
- dw_i2s_dai->capture.channels_min = MIN_CHANNEL_NUM;
- dw_i2s_dai->capture.channels_max = pdata->channel;
- dw_i2s_dai->capture.formats = pdata->snd_fmts;
- dw_i2s_dai->capture.rates = pdata->snd_rates;
- }
-
- dw_i2s_dai->ops = &dw_i2s_dai_ops;
- dw_i2s_dai->suspend = dw_i2s_suspend;
- dw_i2s_dai->resume = dw_i2s_resume;
-
- dev->dev = &pdev->dev;
- dev_set_drvdata(&pdev->dev, dev);
- ret = snd_soc_register_component(&pdev->dev, &dw_i2s_component,
- dw_i2s_dai, 1);
- if (ret != 0) {
- dev_err(&pdev->dev, "not able to register dai\n");
- goto err_set_drvdata;
- }
-
- return 0;
-
-err_set_drvdata:
- dev_set_drvdata(&pdev->dev, NULL);
-err_clk_disable:
- clk_disable(dev->clk);
-err_clk_put:
- clk_put(dev->clk);
- return ret;
-}
-
-static int dw_i2s_remove(struct platform_device *pdev)
-{
- struct dw_i2s_dev *dev = dev_get_drvdata(&pdev->dev);
-
- snd_soc_unregister_component(&pdev->dev);
- dev_set_drvdata(&pdev->dev, NULL);
-
- clk_put(dev->clk);
-
- return 0;
-}
-
-static struct platform_driver dw_i2s_driver = {
- .probe = dw_i2s_probe,
- .remove = dw_i2s_remove,
- .driver = {
- .name = "designware-i2s",
- .owner = THIS_MODULE,
- },
-};
-
-module_platform_driver(dw_i2s_driver);
-
-MODULE_AUTHOR("Rajeev Kumar <rajeev-dlh.kumar@st.com>");
-MODULE_DESCRIPTION("DESIGNWARE I2S SoC Interface");
-MODULE_LICENSE("GPL");
-MODULE_ALIAS("platform:designware_i2s");
generated by cgit (git 2.34.1) at 2025-12-25 04:36:54 +0000