ASoC: samsung: Add DT support for i2s
Add support for device based discovery. Signed-off-by: Padmavathi Venna <padma.v@samsung.com> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
This commit is contained in:
Padmavathi Venna
Mark Brown
parent
2d77828d99
commit
40476f6189
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@ -0,0 +1,63 @@
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* Samsung I2S controller
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Required SoC Specific Properties:
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- compatible : "samsung,i2s-v5"
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- reg: physical base address of the controller and length of memory mapped
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region.
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- dmas: list of DMA controller phandle and DMA request line ordered pairs.
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- dma-names: identifier string for each DMA request line in the dmas property.
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These strings correspond 1:1 with the ordered pairs in dmas.
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Optional SoC Specific Properties:
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- samsung,supports-6ch: If the I2S Primary sound source has 5.1 Channel
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support, this flag is enabled.
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- samsung,supports-rstclr: This flag should be set if I2S software reset bit
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control is required. When this flag is set I2S software reset bit will be
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enabled or disabled based on need.
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- samsung,supports-secdai:If I2S block has a secondary FIFO and internal DMA,
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then this flag is enabled.
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- samsung,idma-addr: Internal DMA register base address of the audio
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sub system(used in secondary sound source).
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Required Board Specific Properties:
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- gpios: The gpio specifier for data out,data in, LRCLK, CDCLK and SCLK
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interface lines. The format of the gpio specifier depends on the gpio
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controller.
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The syntax of samsung gpio specifier is
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<[phandle of the gpio controller node]
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[pin number within the gpio controller]
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[mux function]
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[flags and pull up/down]
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[drive strength]>
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Example:
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- SoC Specific Portion:
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i2s@03830000 {
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compatible = "samsung,i2s-v5";
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reg = <0x03830000 0x100>;
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dmas = <&pdma0 10
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&pdma0 9
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&pdma0 8>;
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dma-names = "tx", "rx", "tx-sec";
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samsung,supports-6ch;
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samsung,supports-rstclr;
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samsung,supports-secdai;
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samsung,idma-addr = <0x03000000>;
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};
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- Board Specific Portion:
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i2s@03830000 {
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gpios = <&gpz 0 2 0 0>, /* I2S_0_SCLK */
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<&gpz 1 2 0 0>, /* I2S_0_CDCLK */
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<&gpz 2 2 0 0>, /* I2S_0_LRCK */
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<&gpz 3 2 0 0>, /* I2S_0_SDI */
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<&gpz 4 2 0 0>, /* I2S_0_SDO[1] */
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<&gpz 5 2 0 0>, /* I2S_0_SDO[2] */
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<&gpz 6 2 0 0>; /* I2S_0_SDO[3] */
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};
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@ -174,7 +174,8 @@ static int dma_hw_params(struct snd_pcm_substream *substream,
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config.width = prtd->params->dma_size;
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config.fifo = prtd->params->dma_addr;
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prtd->params->ch = prtd->params->ops->request(
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prtd->params->channel, &req);
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prtd->params->channel, &req, rtd->cpu_dai->dev,
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prtd->params->ch_name);
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prtd->params->ops->config(prtd->params->ch, &config);
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}
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@ -19,6 +19,7 @@ struct s3c_dma_params {
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int dma_size; /* Size of the DMA transfer */
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unsigned ch;
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struct samsung_dma_ops *ops;
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char *ch_name;
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};
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int asoc_dma_platform_register(struct device *dev);
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@ -15,11 +15,15 @@
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#include <linux/clk.h>
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#include <linux/io.h>
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#include <linux/module.h>
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#include <linux/of.h>
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#include <linux/of_gpio.h>
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#include <linux/pm_runtime.h>
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#include <sound/soc.h>
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#include <sound/pcm_params.h>
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#include <mach/dma.h>
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#include <linux/platform_data/asoc-s3c.h>
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#include "dma.h"
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@ -34,6 +38,10 @@ enum samsung_dai_type {
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TYPE_SEC,
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};
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struct samsung_i2s_dai_data {
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int dai_type;
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};
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struct i2s_dai {
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/* Platform device for this DAI */
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struct platform_device *pdev;
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@ -71,6 +79,7 @@ struct i2s_dai {
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u32 suspend_i2smod;
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u32 suspend_i2scon;
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u32 suspend_i2spsr;
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unsigned long gpios[7]; /* i2s gpio line numbers */
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};
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/* Lock for cross i/f checks */
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@ -1000,19 +1009,76 @@ static struct i2s_dai *i2s_alloc_dai(struct platform_device *pdev, bool sec)
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return i2s;
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}
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#ifdef CONFIG_OF
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static int samsung_i2s_parse_dt_gpio(struct i2s_dai *i2s)
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{
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struct device *dev = &i2s->pdev->dev;
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int index, gpio, ret;
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for (index = 0; index < 7; index++) {
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gpio = of_get_gpio(dev->of_node, index);
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if (!gpio_is_valid(gpio)) {
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dev_err(dev, "invalid gpio[%d]: %d\n", index, gpio);
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goto free_gpio;
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}
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ret = gpio_request(gpio, dev_name(dev));
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if (ret) {
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dev_err(dev, "gpio [%d] request failed\n", gpio);
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goto free_gpio;
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}
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i2s->gpios[index] = gpio;
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}
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return 0;
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free_gpio:
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while (--index >= 0)
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gpio_free(i2s->gpios[index]);
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return -EINVAL;
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}
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static void samsung_i2s_dt_gpio_free(struct i2s_dai *i2s)
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{
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unsigned int index;
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for (index = 0; index < 7; index++)
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gpio_free(i2s->gpios[index]);
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}
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#else
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static int samsung_i2s_parse_dt_gpio(struct i2s_dai *dai)
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{
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return -EINVAL;
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}
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static void samsung_i2s_dt_gpio_free(struct i2s_dai *dai)
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{
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}
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#endif
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static const struct of_device_id exynos_i2s_match[];
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static inline int samsung_i2s_get_driver_data(struct platform_device *pdev)
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{
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#ifdef CONFIG_OF
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struct samsung_i2s_dai_data *data;
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if (pdev->dev.of_node) {
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const struct of_device_id *match;
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match = of_match_node(exynos_i2s_match, pdev->dev.of_node);
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data = (struct samsung_i2s_dai_data *) match->data;
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return data->dai_type;
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} else
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#endif
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return platform_get_device_id(pdev)->driver_data;
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}
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static int samsung_i2s_probe(struct platform_device *pdev)
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{
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u32 dma_pl_chan, dma_cp_chan, dma_pl_sec_chan;
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struct i2s_dai *pri_dai, *sec_dai = NULL;
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struct s3c_audio_pdata *i2s_pdata;
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struct samsung_i2s *i2s_cfg;
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struct s3c_audio_pdata *i2s_pdata = pdev->dev.platform_data;
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struct samsung_i2s *i2s_cfg = NULL;
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struct resource *res;
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u32 regs_base, quirks;
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u32 regs_base, quirks = 0, idma_addr = 0;
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struct device_node *np = pdev->dev.of_node;
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enum samsung_dai_type samsung_dai_type;
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int ret = 0;
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@ -1027,31 +1093,60 @@ static int samsung_i2s_probe(struct platform_device *pdev)
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return 0;
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}
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i2s_pdata = pdev->dev.platform_data;
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pri_dai = i2s_alloc_dai(pdev, false);
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if (!pri_dai) {
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dev_err(&pdev->dev, "Unable to alloc I2S_pri\n");
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return -ENOMEM;
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}
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if (!np) {
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res = platform_get_resource(pdev, IORESOURCE_DMA, 0);
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if (!res) {
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dev_err(&pdev->dev,
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"Unable to get I2S-TX dma resource\n");
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return -ENXIO;
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}
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pri_dai->dma_playback.channel = res->start;
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res = platform_get_resource(pdev, IORESOURCE_DMA, 1);
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if (!res) {
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dev_err(&pdev->dev,
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"Unable to get I2S-RX dma resource\n");
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return -ENXIO;
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}
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pri_dai->dma_capture.channel = res->start;
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if (i2s_pdata == NULL) {
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dev_err(&pdev->dev, "Can't work without s3c_audio_pdata\n");
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return -EINVAL;
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}
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res = platform_get_resource(pdev, IORESOURCE_DMA, 0);
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if (!res) {
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dev_err(&pdev->dev, "Unable to get I2S-TX dma resource\n");
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return -ENXIO;
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}
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dma_pl_chan = res->start;
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if (&i2s_pdata->type)
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i2s_cfg = &i2s_pdata->type.i2s;
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res = platform_get_resource(pdev, IORESOURCE_DMA, 1);
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if (!res) {
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dev_err(&pdev->dev, "Unable to get I2S-RX dma resource\n");
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return -ENXIO;
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if (i2s_cfg) {
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quirks = i2s_cfg->quirks;
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idma_addr = i2s_cfg->idma_addr;
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}
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dma_cp_chan = res->start;
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} else {
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if (of_find_property(np, "samsung,supports-6ch", NULL))
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quirks |= QUIRK_PRI_6CHAN;
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res = platform_get_resource(pdev, IORESOURCE_DMA, 2);
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if (res)
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dma_pl_sec_chan = res->start;
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else
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dma_pl_sec_chan = 0;
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if (of_find_property(np, "samsung,supports-secdai", NULL))
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quirks |= QUIRK_SEC_DAI;
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if (of_find_property(np, "samsung,supports-rstclr", NULL))
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quirks |= QUIRK_NEED_RSTCLR;
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if (of_property_read_u32(np, "samsung,idma-addr",
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&idma_addr)) {
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if (quirks & QUIRK_SEC_DAI) {
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dev_err(&pdev->dev, "idma address is not"\
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"specified");
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return -EINVAL;
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}
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}
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}
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res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
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if (!res) {
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@ -1066,24 +1161,14 @@ static int samsung_i2s_probe(struct platform_device *pdev)
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}
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regs_base = res->start;
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i2s_cfg = &i2s_pdata->type.i2s;
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quirks = i2s_cfg->quirks;
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pri_dai = i2s_alloc_dai(pdev, false);
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if (!pri_dai) {
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dev_err(&pdev->dev, "Unable to alloc I2S_pri\n");
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ret = -ENOMEM;
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goto err;
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}
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pri_dai->dma_playback.dma_addr = regs_base + I2STXD;
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pri_dai->dma_capture.dma_addr = regs_base + I2SRXD;
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pri_dai->dma_playback.client =
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(struct s3c2410_dma_client *)&pri_dai->dma_playback;
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pri_dai->dma_playback.ch_name = "tx";
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pri_dai->dma_capture.client =
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(struct s3c2410_dma_client *)&pri_dai->dma_capture;
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pri_dai->dma_playback.channel = dma_pl_chan;
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pri_dai->dma_capture.channel = dma_cp_chan;
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pri_dai->dma_capture.ch_name = "rx";
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pri_dai->dma_playback.dma_size = 4;
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pri_dai->dma_capture.dma_size = 4;
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pri_dai->base = regs_base;
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@ -1102,21 +1187,35 @@ static int samsung_i2s_probe(struct platform_device *pdev)
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sec_dai->dma_playback.dma_addr = regs_base + I2STXDS;
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sec_dai->dma_playback.client =
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(struct s3c2410_dma_client *)&sec_dai->dma_playback;
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/* Use iDMA always if SysDMA not provided */
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sec_dai->dma_playback.channel = dma_pl_sec_chan ? : -1;
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sec_dai->dma_playback.ch_name = "tx-sec";
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if (!np) {
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res = platform_get_resource(pdev, IORESOURCE_DMA, 2);
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if (res)
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sec_dai->dma_playback.channel = res->start;
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}
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sec_dai->dma_playback.dma_size = 4;
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sec_dai->base = regs_base;
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sec_dai->quirks = quirks;
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sec_dai->idma_playback.dma_addr = i2s_cfg->idma_addr;
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sec_dai->idma_playback.dma_addr = idma_addr;
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sec_dai->pri_dai = pri_dai;
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pri_dai->sec_dai = sec_dai;
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}
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if (np) {
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if (samsung_i2s_parse_dt_gpio(pri_dai)) {
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dev_err(&pdev->dev, "Unable to configure gpio\n");
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ret = -EINVAL;
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goto err;
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}
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} else {
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if (i2s_pdata->cfg_gpio && i2s_pdata->cfg_gpio(pdev)) {
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dev_err(&pdev->dev, "Unable to configure gpio\n");
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ret = -EINVAL;
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goto err;
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}
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}
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snd_soc_register_dai(&pri_dai->pdev->dev, &pri_dai->i2s_dai_drv);
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@ -1135,10 +1234,14 @@ static int samsung_i2s_remove(struct platform_device *pdev)
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{
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struct i2s_dai *i2s, *other;
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struct resource *res;
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struct s3c_audio_pdata *i2s_pdata = pdev->dev.platform_data;
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i2s = dev_get_drvdata(&pdev->dev);
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other = i2s->pri_dai ? : i2s->sec_dai;
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if (!i2s_pdata->cfg_gpio && pdev->dev.of_node)
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samsung_i2s_dt_gpio_free(i2s->pri_dai);
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if (other) {
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other->pri_dai = NULL;
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other->sec_dai = NULL;
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@ -1170,6 +1273,21 @@ static struct platform_device_id samsung_i2s_driver_ids[] = {
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};
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MODULE_DEVICE_TABLE(platform, samsung-i2s-driver-ids);
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#ifdef CONFIG_OF
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static struct samsung_i2s_dai_data samsung_i2s_dai_data_array[] = {
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[TYPE_PRI] = { TYPE_PRI },
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[TYPE_SEC] = { TYPE_SEC },
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};
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static const struct of_device_id exynos_i2s_match[] = {
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{ .compatible = "samsung,i2s-v5",
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.data = &samsung_i2s_dai_data_array[TYPE_PRI],
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},
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{},
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};
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MODULE_DEVICE_TABLE(of, exynos_i2s_match);
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#endif
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static struct platform_driver samsung_i2s_driver = {
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.probe = samsung_i2s_probe,
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.remove = samsung_i2s_remove,
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@ -1177,6 +1295,7 @@ static struct platform_driver samsung_i2s_driver = {
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.driver = {
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.name = "samsung-i2s",
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.owner = THIS_MODULE,
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.of_match_table = of_match_ptr(exynos_i2s_match),
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},
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};
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