Commit 5939ae74 authored by Stephen Warren's avatar Stephen Warren Committed by Mark Brown
Browse files

ASoC: convert Tegra20 SPDIF driver to regmap 



Signed-off-by: default avatarStephen Warren <swarren@nvidia.com>
Signed-off-by: default avatarMark Brown <broonie@opensource.wolfsonmicro.com>
parent c1607416

sound/soc/tegra/tegra20_spdif.c

+91 −82
Original line number Diff line number Diff line
@@ -21,13 +21,12 @@ 
 */



#include <linux/clk.h>

#include <linux/debugfs.h>

#include <linux/device.h>

#include <linux/io.h>

#include <linux/module.h>

#include <linux/platform_device.h>

#include <linux/pm_runtime.h>

#include <linux/seq_file.h>

#include <linux/regmap.h>

#include <linux/slab.h>

#include <sound/core.h>

#include <sound/pcm.h>
@@ -41,12 +40,14 @@ 
static inline void tegra20_spdif_write(struct tegra20_spdif *spdif, u32 reg,

					u32 val)

{

	__raw_writel(val, spdif->regs + reg);

	regmap_write(spdif->regmap, reg, val);

}



static inline u32 tegra20_spdif_read(struct tegra20_spdif *spdif, u32 reg)

{

	return __raw_readl(spdif->regs + reg);

	u32 val;

	regmap_read(spdif->regmap, reg, &val);

	return val;

}



static int tegra20_spdif_runtime_suspend(struct device *dev)
@@ -72,78 +73,6 @@ static int tegra20_spdif_runtime_resume(struct device *dev) 
	return 0;

}



#ifdef CONFIG_DEBUG_FS

static int tegra20_spdif_show(struct seq_file *s, void *unused)

{

#define REG(r) { r, #r }

	static const struct {

		int offset;

		const char *name;

	} regs[] = {

		REG(TEGRA20_SPDIF_CTRL),

		REG(TEGRA20_SPDIF_STATUS),

		REG(TEGRA20_SPDIF_STROBE_CTRL),

		REG(TEGRA20_SPDIF_DATA_FIFO_CSR),

		REG(TEGRA20_SPDIF_CH_STA_RX_A),

		REG(TEGRA20_SPDIF_CH_STA_RX_B),

		REG(TEGRA20_SPDIF_CH_STA_RX_C),

		REG(TEGRA20_SPDIF_CH_STA_RX_D),

		REG(TEGRA20_SPDIF_CH_STA_RX_E),

		REG(TEGRA20_SPDIF_CH_STA_RX_F),

		REG(TEGRA20_SPDIF_CH_STA_TX_A),

		REG(TEGRA20_SPDIF_CH_STA_TX_B),

		REG(TEGRA20_SPDIF_CH_STA_TX_C),

		REG(TEGRA20_SPDIF_CH_STA_TX_D),

		REG(TEGRA20_SPDIF_CH_STA_TX_E),

		REG(TEGRA20_SPDIF_CH_STA_TX_F),

	};

#undef REG



	struct tegra20_spdif *spdif = s->private;

	int i;



	for (i = 0; i < ARRAY_SIZE(regs); i++) {

		u32 val = tegra20_spdif_read(spdif, regs[i].offset);

		seq_printf(s, "%s = %08x\n", regs[i].name, val);

	}



	return 0;

}



static int tegra20_spdif_debug_open(struct inode *inode, struct file *file)

{

	return single_open(file, tegra20_spdif_show, inode->i_private);

}



static const struct file_operations tegra20_spdif_debug_fops = {

	.open    = tegra20_spdif_debug_open,

	.read    = seq_read,

	.llseek  = seq_lseek,

	.release = single_release,

};



static void tegra20_spdif_debug_add(struct tegra20_spdif *spdif)

{

	spdif->debug = debugfs_create_file(DRV_NAME, S_IRUGO,

						snd_soc_debugfs_root, spdif,

						&tegra20_spdif_debug_fops);

}



static void tegra20_spdif_debug_remove(struct tegra20_spdif *spdif)

{

	if (spdif->debug)

		debugfs_remove(spdif->debug);

}

#else

static inline void tegra20_spdif_debug_add(struct tegra20_spdif *spdif)

{

}



static inline void tegra20_spdif_debug_remove(struct tegra20_spdif *spdif)

{

}

#endif



static int tegra20_spdif_hw_params(struct snd_pcm_substream *substream,

				struct snd_pcm_hw_params *params,

				struct snd_soc_dai *dai)
@@ -261,10 +190,86 @@ static struct snd_soc_dai_driver tegra20_spdif_dai = { 
	.ops = &tegra20_spdif_dai_ops,

};



static bool tegra20_spdif_wr_rd_reg(struct device *dev, unsigned int reg)

{

	switch (reg) {

	case TEGRA20_SPDIF_CTRL:

	case TEGRA20_SPDIF_STATUS:

	case TEGRA20_SPDIF_STROBE_CTRL:

	case TEGRA20_SPDIF_DATA_FIFO_CSR:

	case TEGRA20_SPDIF_DATA_OUT:

	case TEGRA20_SPDIF_DATA_IN:

	case TEGRA20_SPDIF_CH_STA_RX_A:

	case TEGRA20_SPDIF_CH_STA_RX_B:

	case TEGRA20_SPDIF_CH_STA_RX_C:

	case TEGRA20_SPDIF_CH_STA_RX_D:

	case TEGRA20_SPDIF_CH_STA_RX_E:

	case TEGRA20_SPDIF_CH_STA_RX_F:

	case TEGRA20_SPDIF_CH_STA_TX_A:

	case TEGRA20_SPDIF_CH_STA_TX_B:

	case TEGRA20_SPDIF_CH_STA_TX_C:

	case TEGRA20_SPDIF_CH_STA_TX_D:

	case TEGRA20_SPDIF_CH_STA_TX_E:

	case TEGRA20_SPDIF_CH_STA_TX_F:

	case TEGRA20_SPDIF_USR_STA_RX_A:

	case TEGRA20_SPDIF_USR_DAT_TX_A:

		return true;

	default:

		return false;

	};

}



static bool tegra20_spdif_volatile_reg(struct device *dev, unsigned int reg)

{

	switch (reg) {

	case TEGRA20_SPDIF_STATUS:

	case TEGRA20_SPDIF_DATA_FIFO_CSR:

	case TEGRA20_SPDIF_DATA_OUT:

	case TEGRA20_SPDIF_DATA_IN:

	case TEGRA20_SPDIF_CH_STA_RX_A:

	case TEGRA20_SPDIF_CH_STA_RX_B:

	case TEGRA20_SPDIF_CH_STA_RX_C:

	case TEGRA20_SPDIF_CH_STA_RX_D:

	case TEGRA20_SPDIF_CH_STA_RX_E:

	case TEGRA20_SPDIF_CH_STA_RX_F:

	case TEGRA20_SPDIF_USR_STA_RX_A:

	case TEGRA20_SPDIF_USR_DAT_TX_A:

		return true;

	default:

		return false;

	};

}



static bool tegra20_spdif_precious_reg(struct device *dev, unsigned int reg)

{

	switch (reg) {

	case TEGRA20_SPDIF_DATA_OUT:

	case TEGRA20_SPDIF_DATA_IN:

	case TEGRA20_SPDIF_USR_STA_RX_A:

	case TEGRA20_SPDIF_USR_DAT_TX_A:

		return true;

	default:

		return false;

	};

}



static const struct regmap_config tegra20_spdif_regmap_config = {

	.reg_bits = 32,

	.reg_stride = 4,

	.val_bits = 32,

	.max_register = TEGRA20_SPDIF_USR_DAT_TX_A,

	.writeable_reg = tegra20_spdif_wr_rd_reg,

	.readable_reg = tegra20_spdif_wr_rd_reg,

	.volatile_reg = tegra20_spdif_volatile_reg,

	.precious_reg = tegra20_spdif_precious_reg,

	.cache_type = REGCACHE_RBTREE,

};



static __devinit int tegra20_spdif_platform_probe(struct platform_device *pdev)

{

	struct tegra20_spdif *spdif;

	struct resource *mem, *memregion, *dmareq;

	void __iomem *regs;

	int ret;



	spdif = devm_kzalloc(&pdev->dev, sizeof(struct tegra20_spdif),
@@ -305,13 +310,21 @@ static __devinit int tegra20_spdif_platform_probe(struct platform_device *pdev) 
		goto err_clk_put;

	}



	spdif->regs = devm_ioremap(&pdev->dev, mem->start, resource_size(mem));

	if (!spdif->regs) {

	regs = devm_ioremap(&pdev->dev, mem->start, resource_size(mem));

	if (!regs) {

		dev_err(&pdev->dev, "ioremap failed\n");

		ret = -ENOMEM;

		goto err_clk_put;

	}



	spdif->regmap = devm_regmap_init_mmio(&pdev->dev, regs,

					    &tegra20_spdif_regmap_config);

	if (IS_ERR(spdif->regmap)) {

		dev_err(&pdev->dev, "regmap init failed\n");

		ret = PTR_ERR(spdif->regmap);

		goto err_clk_put;

	}



	spdif->playback_dma_data.addr = mem->start + TEGRA20_SPDIF_DATA_OUT;

	spdif->playback_dma_data.wrap = 4;

	spdif->playback_dma_data.width = 32;
@@ -337,8 +350,6 @@ static __devinit int tegra20_spdif_platform_probe(struct platform_device *pdev) 
		goto err_unregister_dai;

	}



	tegra20_spdif_debug_add(spdif);



	return 0;



err_unregister_dai:
@@ -365,8 +376,6 @@ static int __devexit tegra20_spdif_platform_remove(struct platform_device *pdev) 
	tegra_pcm_platform_unregister(&pdev->dev);

	snd_soc_unregister_dai(&pdev->dev);



	tegra20_spdif_debug_remove(spdif);



	clk_put(spdif->clk_spdif_out);



	return 0;

sound/soc/tegra/tegra20_spdif.h

+1 −2
Original line number Diff line number Diff line
@@ -464,8 +464,7 @@ struct tegra20_spdif { 
	struct clk *clk_spdif_out;

	struct tegra_pcm_dma_params capture_dma_data;

	struct tegra_pcm_dma_params playback_dma_data;

	void __iomem *regs;

	struct dentry *debug;

	struct regmap *regmap;

	u32 reg_ctrl;

};

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