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Subject[PATCH v2] ASoC: fsl-sai: convert to use regmap API for Freeacale SAI
Date
Signed-off-by: Xiubo Li <Li.Xiubo@freescale.com>
Cc: Nicolin Chen <Guangyu.Chen@freescale.com>
---

This version applies against sound-3.14-rc1.


sound/soc/fsl/fsl_sai.c | 255 +++++++++++++++++++++++++++---------------------
sound/soc/fsl/fsl_sai.h | 47 +++++----
2 files changed, 166 insertions(+), 136 deletions(-)

diff --git a/sound/soc/fsl/fsl_sai.c b/sound/soc/fsl/fsl_sai.c
index cdd3fa8..faa65af 100644
--- a/sound/soc/fsl/fsl_sai.c
+++ b/sound/soc/fsl/fsl_sai.c
@@ -15,6 +15,7 @@
#include <linux/dmaengine.h>
#include <linux/module.h>
#include <linux/of_address.h>
+#include <linux/regmap.h>
#include <linux/slab.h>
#include <sound/core.h>
#include <sound/dmaengine_pcm.h>
@@ -22,34 +23,6 @@

#include "fsl_sai.h"

-static inline u32 sai_readl(struct fsl_sai *sai,
- const void __iomem *addr)
-{
- u32 val;
-
- val = __raw_readl(addr);
-
- if (likely(sai->big_endian_regs))
- val = be32_to_cpu(val);
- else
- val = le32_to_cpu(val);
- rmb();
-
- return val;
-}
-
-static inline void sai_writel(struct fsl_sai *sai,
- u32 val, void __iomem *addr)
-{
- wmb();
- if (likely(sai->big_endian_regs))
- val = cpu_to_be32(val);
- else
- val = cpu_to_le32(val);
-
- __raw_writel(val, addr);
-}
-
static int fsl_sai_set_dai_sysclk_tr(struct snd_soc_dai *cpu_dai,
int clk_id, unsigned int freq, int fsl_dir)
{
@@ -61,7 +34,8 @@ static int fsl_sai_set_dai_sysclk_tr(struct snd_soc_dai *cpu_dai,
else
reg_cr2 = FSL_SAI_RCR2;

- val_cr2 = sai_readl(sai, sai->base + reg_cr2);
+ regmap_read(sai->regmap, reg_cr2, &val_cr2);
+
val_cr2 &= ~FSL_SAI_CR2_MSEL_MASK;

switch (clk_id) {
@@ -81,7 +55,7 @@ static int fsl_sai_set_dai_sysclk_tr(struct snd_soc_dai *cpu_dai,
return -EINVAL;
}

- sai_writel(sai, val_cr2, sai->base + reg_cr2);
+ regmap_write(sai->regmap, reg_cr2, val_cr2);

return 0;
}
@@ -89,32 +63,22 @@ static int fsl_sai_set_dai_sysclk_tr(struct snd_soc_dai *cpu_dai,
static int fsl_sai_set_dai_sysclk(struct snd_soc_dai *cpu_dai,
int clk_id, unsigned int freq, int dir)
{
- struct fsl_sai *sai = snd_soc_dai_get_drvdata(cpu_dai);
int ret;

if (dir == SND_SOC_CLOCK_IN)
return 0;

- ret = clk_prepare_enable(sai->clk);
- if (ret)
- return ret;
-
ret = fsl_sai_set_dai_sysclk_tr(cpu_dai, clk_id, freq,
FSL_FMT_TRANSMITTER);
if (ret) {
dev_err(cpu_dai->dev, "Cannot set tx sysclk: %d\n", ret);
- goto err_clk;
+ return ret;
}

ret = fsl_sai_set_dai_sysclk_tr(cpu_dai, clk_id, freq,
FSL_FMT_RECEIVER);
- if (ret) {
+ if (ret)
dev_err(cpu_dai->dev, "Cannot set rx sysclk: %d\n", ret);
- goto err_clk;
- }
-
-err_clk:
- clk_disable_unprepare(sai->clk);

return ret;
}
@@ -133,8 +97,8 @@ static int fsl_sai_set_dai_fmt_tr(struct snd_soc_dai *cpu_dai,
reg_cr4 = FSL_SAI_RCR4;
}

- val_cr2 = sai_readl(sai, sai->base + reg_cr2);
- val_cr4 = sai_readl(sai, sai->base + reg_cr4);
+ regmap_read(sai->regmap, reg_cr2, &val_cr2);
+ regmap_read(sai->regmap, reg_cr4, &val_cr4);

if (sai->big_endian_data)
val_cr4 &= ~FSL_SAI_CR4_MF;
@@ -183,35 +147,25 @@ static int fsl_sai_set_dai_fmt_tr(struct snd_soc_dai *cpu_dai,
return -EINVAL;
}

- sai_writel(sai, val_cr2, sai->base + reg_cr2);
- sai_writel(sai, val_cr4, sai->base + reg_cr4);
+ regmap_write(sai->regmap, reg_cr2, val_cr2);
+ regmap_write(sai->regmap, reg_cr4, val_cr4);

return 0;
}

static int fsl_sai_set_dai_fmt(struct snd_soc_dai *cpu_dai, unsigned int fmt)
{
- struct fsl_sai *sai = snd_soc_dai_get_drvdata(cpu_dai);
int ret;

- ret = clk_prepare_enable(sai->clk);
- if (ret)
- return ret;
-
ret = fsl_sai_set_dai_fmt_tr(cpu_dai, fmt, FSL_FMT_TRANSMITTER);
if (ret) {
dev_err(cpu_dai->dev, "Cannot set tx format: %d\n", ret);
- goto err_clk;
+ return ret;
}

ret = fsl_sai_set_dai_fmt_tr(cpu_dai, fmt, FSL_FMT_RECEIVER);
- if (ret) {
+ if (ret)
dev_err(cpu_dai->dev, "Cannot set rx format: %d\n", ret);
- goto err_clk;
- }
-
-err_clk:
- clk_disable_unprepare(sai->clk);

return ret;
}
@@ -235,11 +189,12 @@ static int fsl_sai_hw_params(struct snd_pcm_substream *substream,
reg_mr = FSL_SAI_RMR;
}

- val_cr4 = sai_readl(sai, sai->base + reg_cr4);
+ regmap_read(sai->regmap, reg_cr4, &val_cr4);
+ regmap_read(sai->regmap, reg_cr4, &val_cr5);
+
val_cr4 &= ~FSL_SAI_CR4_SYWD_MASK;
val_cr4 &= ~FSL_SAI_CR4_FRSZ_MASK;

- val_cr5 = sai_readl(sai, sai->base + reg_cr5);
val_cr5 &= ~FSL_SAI_CR5_WNW_MASK;
val_cr5 &= ~FSL_SAI_CR5_W0W_MASK;
val_cr5 &= ~FSL_SAI_CR5_FBT_MASK;
@@ -257,9 +212,9 @@ static int fsl_sai_hw_params(struct snd_pcm_substream *substream,
val_cr4 |= FSL_SAI_CR4_FRSZ(channels);
val_mr = ~0UL - ((1 << channels) - 1);

- sai_writel(sai, val_cr4, sai->base + reg_cr4);
- sai_writel(sai, val_cr5, sai->base + reg_cr5);
- sai_writel(sai, val_mr, sai->base + reg_mr);
+ regmap_write(sai->regmap, reg_cr4, val_cr4);
+ regmap_write(sai->regmap, reg_cr5, val_cr5);
+ regmap_write(sai->regmap, reg_mr, val_mr);

return 0;
}
@@ -268,44 +223,34 @@ static int fsl_sai_trigger(struct snd_pcm_substream *substream, int cmd,
struct snd_soc_dai *cpu_dai)
{
struct fsl_sai *sai = snd_soc_dai_get_drvdata(cpu_dai);
- u32 tcsr, rcsr, val_cr2, val_cr3, reg_cr3;
-
- val_cr2 = sai_readl(sai, sai->base + FSL_SAI_TCR2);
- val_cr2 &= ~FSL_SAI_CR2_SYNC;
- sai_writel(sai, val_cr2, sai->base + FSL_SAI_TCR2);
+ u32 tcsr, rcsr;

- val_cr2 = sai_readl(sai, sai->base + FSL_SAI_RCR2);
- val_cr2 |= FSL_SAI_CR2_SYNC;
- sai_writel(sai, val_cr2, sai->base + FSL_SAI_RCR2);
+ regmap_update_bits(sai->regmap, FSL_SAI_TCR2, FSL_SAI_CR2_SYNC,
+ ~FSL_SAI_CR2_SYNC);
+ regmap_update_bits(sai->regmap, FSL_SAI_RCR2, FSL_SAI_CR2_SYNC,
+ FSL_SAI_CR2_SYNC);

- tcsr = sai_readl(sai, sai->base + FSL_SAI_TCSR);
- rcsr = sai_readl(sai, sai->base + FSL_SAI_RCSR);
+ regmap_read(sai->regmap, FSL_SAI_TCSR, &tcsr);
+ regmap_read(sai->regmap, FSL_SAI_RCSR, &rcsr);

if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
tcsr |= FSL_SAI_CSR_FRDE;
rcsr &= ~FSL_SAI_CSR_FRDE;
- reg_cr3 = FSL_SAI_TCR3;
} else {
rcsr |= FSL_SAI_CSR_FRDE;
tcsr &= ~FSL_SAI_CSR_FRDE;
- reg_cr3 = FSL_SAI_RCR3;
}

- val_cr3 = sai_readl(sai, sai->base + reg_cr3);
-
switch (cmd) {
case SNDRV_PCM_TRIGGER_START:
case SNDRV_PCM_TRIGGER_RESUME:
case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
tcsr |= FSL_SAI_CSR_TERE;
rcsr |= FSL_SAI_CSR_TERE;
- val_cr3 |= FSL_SAI_CR3_TRCE;

- sai_writel(sai, val_cr3, sai->base + reg_cr3);
- sai_writel(sai, rcsr, sai->base + FSL_SAI_RCSR);
- sai_writel(sai, tcsr, sai->base + FSL_SAI_TCSR);
+ regmap_write(sai->regmap, FSL_SAI_RCSR, rcsr);
+ regmap_write(sai->regmap, FSL_SAI_TCSR, tcsr);
break;
-
case SNDRV_PCM_TRIGGER_STOP:
case SNDRV_PCM_TRIGGER_SUSPEND:
case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
@@ -314,11 +259,8 @@ static int fsl_sai_trigger(struct snd_pcm_substream *substream, int cmd,
rcsr &= ~FSL_SAI_CSR_TERE;
}

- val_cr3 &= ~FSL_SAI_CR3_TRCE;
-
- sai_writel(sai, tcsr, sai->base + FSL_SAI_TCSR);
- sai_writel(sai, rcsr, sai->base + FSL_SAI_RCSR);
- sai_writel(sai, val_cr3, sai->base + reg_cr3);
+ regmap_write(sai->regmap, FSL_SAI_TCSR, tcsr);
+ regmap_write(sai->regmap, FSL_SAI_RCSR, rcsr);
break;
default:
return -EINVAL;
@@ -331,16 +273,32 @@ static int fsl_sai_startup(struct snd_pcm_substream *substream,
struct snd_soc_dai *cpu_dai)
{
struct fsl_sai *sai = snd_soc_dai_get_drvdata(cpu_dai);
+ u32 reg;

- return clk_prepare_enable(sai->clk);
+ if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
+ reg = FSL_SAI_TCR3;
+ else
+ reg = FSL_SAI_RCR3;
+
+ regmap_update_bits(sai->regmap, reg, FSL_SAI_CR3_TRCE,
+ FSL_SAI_CR3_TRCE);
+
+ return 0;
}

static void fsl_sai_shutdown(struct snd_pcm_substream *substream,
struct snd_soc_dai *cpu_dai)
{
struct fsl_sai *sai = snd_soc_dai_get_drvdata(cpu_dai);
+ u32 reg;
+
+ if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
+ reg = FSL_SAI_TCR3;
+ else
+ reg = FSL_SAI_RCR3;

- clk_disable_unprepare(sai->clk);
+ regmap_update_bits(sai->regmap, reg, FSL_SAI_CR3_TRCE,
+ ~FSL_SAI_CR3_TRCE);
}

static const struct snd_soc_dai_ops fsl_sai_pcm_dai_ops = {
@@ -355,18 +313,13 @@ static const struct snd_soc_dai_ops fsl_sai_pcm_dai_ops = {
static int fsl_sai_dai_probe(struct snd_soc_dai *cpu_dai)
{
struct fsl_sai *sai = dev_get_drvdata(cpu_dai->dev);
- int ret;
-
- ret = clk_prepare_enable(sai->clk);
- if (ret)
- return ret;

- sai_writel(sai, 0x0, sai->base + FSL_SAI_RCSR);
- sai_writel(sai, 0x0, sai->base + FSL_SAI_TCSR);
- sai_writel(sai, FSL_SAI_MAXBURST_TX * 2, sai->base + FSL_SAI_TCR1);
- sai_writel(sai, FSL_SAI_MAXBURST_RX - 1, sai->base + FSL_SAI_RCR1);
-
- clk_disable_unprepare(sai->clk);
+ regmap_update_bits(sai->regmap, FSL_SAI_TCSR, 0xffffffff, 0x0);
+ regmap_update_bits(sai->regmap, FSL_SAI_RCSR, 0xffffffff, 0x0);
+ regmap_update_bits(sai->regmap, FSL_SAI_TCR1, FSL_SAI_CR1_RFW_MASK,
+ FSL_SAI_MAXBURST_TX * 2);
+ regmap_update_bits(sai->regmap, FSL_SAI_RCR1, FSL_SAI_CR1_RFW_MASK,
+ FSL_SAI_MAXBURST_RX - 1);

snd_soc_dai_init_dma_data(cpu_dai, &sai->dma_params_tx,
&sai->dma_params_rx);
@@ -397,26 +350,109 @@ static const struct snd_soc_component_driver fsl_component = {
.name = "fsl-sai",
};

+static bool fsl_sai_readable_reg(struct device *dev, unsigned int reg)
+{
+ switch (reg) {
+ case FSL_SAI_TCSR:
+ case FSL_SAI_TCR1:
+ case FSL_SAI_TCR2:
+ case FSL_SAI_TCR3:
+ case FSL_SAI_TCR4:
+ case FSL_SAI_TCR5:
+ case FSL_SAI_TFR:
+ case FSL_SAI_TMR:
+ case FSL_SAI_RCSR:
+ case FSL_SAI_RCR1:
+ case FSL_SAI_RCR2:
+ case FSL_SAI_RCR3:
+ case FSL_SAI_RCR4:
+ case FSL_SAI_RCR5:
+ case FSL_SAI_RDR:
+ case FSL_SAI_RFR:
+ case FSL_SAI_RMR:
+ return true;
+ default:
+ return false;
+ }
+}
+
+static bool fsl_sai_volatile_reg(struct device *dev, unsigned int reg)
+{
+ switch (reg) {
+ case FSL_SAI_TFR:
+ case FSL_SAI_RFR:
+ case FSL_SAI_TDR:
+ case FSL_SAI_RDR:
+ return true;
+ default:
+ return false;
+ }
+
+}
+
+static bool fsl_sai_writeable_reg(struct device *dev, unsigned int reg)
+{
+ switch (reg) {
+ case FSL_SAI_TCSR:
+ case FSL_SAI_TCR1:
+ case FSL_SAI_TCR2:
+ case FSL_SAI_TCR3:
+ case FSL_SAI_TCR4:
+ case FSL_SAI_TCR5:
+ case FSL_SAI_TDR:
+ case FSL_SAI_TMR:
+ case FSL_SAI_RCSR:
+ case FSL_SAI_RCR1:
+ case FSL_SAI_RCR2:
+ case FSL_SAI_RCR3:
+ case FSL_SAI_RCR4:
+ case FSL_SAI_RCR5:
+ case FSL_SAI_RMR:
+ return true;
+ default:
+ return false;
+ }
+}
+
+static struct regmap_config fsl_sai_regmap_config = {
+ .reg_bits = 32,
+ .reg_stride = 4,
+ .val_bits = 32,
+
+ .max_register = FSL_SAI_RMR,
+ .readable_reg = fsl_sai_readable_reg,
+ .volatile_reg = fsl_sai_volatile_reg,
+ .writeable_reg = fsl_sai_writeable_reg,
+};
+
static int fsl_sai_probe(struct platform_device *pdev)
{
struct device_node *np = pdev->dev.of_node;
struct fsl_sai *sai;
struct resource *res;
+ void __iomem *base;
int ret;

sai = devm_kzalloc(&pdev->dev, sizeof(*sai), GFP_KERNEL);
if (!sai)
return -ENOMEM;

+ sai->big_endian_regs = of_property_read_bool(np, "big-endian-regs");
+ if (sai->big_endian_regs)
+ fsl_sai_regmap_config.val_format_endian = REGMAP_ENDIAN_BIG;
+
+ sai->big_endian_data = of_property_read_bool(np, "big-endian-data");
+
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
- sai->base = devm_ioremap_resource(&pdev->dev, res);
- if (IS_ERR(sai->base))
- return PTR_ERR(sai->base);
-
- sai->clk = devm_clk_get(&pdev->dev, "sai");
- if (IS_ERR(sai->clk)) {
- dev_err(&pdev->dev, "Cannot get SAI's clock\n");
- return PTR_ERR(sai->clk);
+ base = devm_ioremap_resource(&pdev->dev, res);
+ if (IS_ERR(base))
+ return PTR_ERR(base);
+
+ sai->regmap = devm_regmap_init_mmio_clk(&pdev->dev,
+ "sai", base, &fsl_sai_regmap_config);
+ if (IS_ERR(sai->regmap)) {
+ dev_err(&pdev->dev, "regmap init failed\n");
+ return PTR_ERR(sai->regmap);
}

sai->dma_params_rx.addr = res->start + FSL_SAI_RDR;
@@ -424,9 +460,6 @@ static int fsl_sai_probe(struct platform_device *pdev)
sai->dma_params_rx.maxburst = FSL_SAI_MAXBURST_RX;
sai->dma_params_tx.maxburst = FSL_SAI_MAXBURST_TX;

- sai->big_endian_regs = of_property_read_bool(np, "big-endian-regs");
- sai->big_endian_data = of_property_read_bool(np, "big-endian-data");
-
platform_set_drvdata(pdev, sai);

ret = devm_snd_soc_register_component(&pdev->dev, &fsl_component,
diff --git a/sound/soc/fsl/fsl_sai.h b/sound/soc/fsl/fsl_sai.h
index 41bb62e..1571459 100644
--- a/sound/soc/fsl/fsl_sai.h
+++ b/sound/soc/fsl/fsl_sai.h
@@ -15,31 +15,36 @@
SNDRV_PCM_FMTBIT_S20_3LE |\
SNDRV_PCM_FMTBIT_S24_LE)

+/* SAI Register Map Register */
+#define FSL_SAI_TCSR 0x00 /* SAI Transmit Control */
+#define FSL_SAI_TCR1 0x04 /* SAI Transmit Configuration 1 */
+#define FSL_SAI_TCR2 0x08 /* SAI Transmit Configuration 2 */
+#define FSL_SAI_TCR3 0x0c /* SAI Transmit Configuration 3 */
+#define FSL_SAI_TCR4 0x10 /* SAI Transmit Configuration 4 */
+#define FSL_SAI_TCR5 0x14 /* SAI Transmit Configuration 5 */
+#define FSL_SAI_TDR 0x20 /* SAI Transmit Data */
+#define FSL_SAI_TFR 0x40 /* SAI Transmit FIFO */
+#define FSL_SAI_TMR 0x60 /* SAI Transmit Mask */
+#define FSL_SAI_RCSR 0x80 /* SAI Receive Control */
+#define FSL_SAI_RCR1 0x84 /* SAI Receive Configuration 1 */
+#define FSL_SAI_RCR2 0x88 /* SAI Receive Configuration 2 */
+#define FSL_SAI_RCR3 0x8c /* SAI Receive Configuration 3 */
+#define FSL_SAI_RCR4 0x90 /* SAI Receive Configuration 4 */
+#define FSL_SAI_RCR5 0x94 /* SAI Receive Configuration 5 */
+#define FSL_SAI_RDR 0xa0 /* SAI Receive Data */
+#define FSL_SAI_RFR 0xc0 /* SAI Receive FIFO */
+#define FSL_SAI_RMR 0xe0 /* SAI Receive Mask */
+
/* SAI Transmit/Recieve Control Register */
-#define FSL_SAI_TCSR 0x00
-#define FSL_SAI_RCSR 0x80
#define FSL_SAI_CSR_TERE BIT(31)
#define FSL_SAI_CSR_FWF BIT(17)
#define FSL_SAI_CSR_FRIE BIT(8)
#define FSL_SAI_CSR_FRDE BIT(0)

-/* SAI Transmit Data/FIFO/MASK Register */
-#define FSL_SAI_TDR 0x20
-#define FSL_SAI_TFR 0x40
-#define FSL_SAI_TMR 0x60
-
-/* SAI Recieve Data/FIFO/MASK Register */
-#define FSL_SAI_RDR 0xa0
-#define FSL_SAI_RFR 0xc0
-#define FSL_SAI_RMR 0xe0
-
/* SAI Transmit and Recieve Configuration 1 Register */
-#define FSL_SAI_TCR1 0x04
-#define FSL_SAI_RCR1 0x84
+#define FSL_SAI_CR1_RFW_MASK 0x1f

/* SAI Transmit and Recieve Configuration 2 Register */
-#define FSL_SAI_TCR2 0x08
-#define FSL_SAI_RCR2 0x88
#define FSL_SAI_CR2_SYNC BIT(30)
#define FSL_SAI_CR2_MSEL_MASK (0xff << 26)
#define FSL_SAI_CR2_MSEL_BUS 0
@@ -50,15 +55,11 @@
#define FSL_SAI_CR2_BCD_MSTR BIT(24)

/* SAI Transmit and Recieve Configuration 3 Register */
-#define FSL_SAI_TCR3 0x0c
-#define FSL_SAI_RCR3 0x8c
#define FSL_SAI_CR3_TRCE BIT(16)
#define FSL_SAI_CR3_WDFL(x) (x)
#define FSL_SAI_CR3_WDFL_MASK 0x1f

/* SAI Transmit and Recieve Configuration 4 Register */
-#define FSL_SAI_TCR4 0x10
-#define FSL_SAI_RCR4 0x90
#define FSL_SAI_CR4_FRSZ(x) (((x) - 1) << 16)
#define FSL_SAI_CR4_FRSZ_MASK (0x1f << 16)
#define FSL_SAI_CR4_SYWD(x) (((x) - 1) << 8)
@@ -69,8 +70,6 @@
#define FSL_SAI_CR4_FSD_MSTR BIT(0)

/* SAI Transmit and Recieve Configuration 5 Register */
-#define FSL_SAI_TCR5 0x14
-#define FSL_SAI_RCR5 0x94
#define FSL_SAI_CR5_WNW(x) (((x) - 1) << 24)
#define FSL_SAI_CR5_WNW_MASK (0x1f << 24)
#define FSL_SAI_CR5_W0W(x) (((x) - 1) << 16)
@@ -100,9 +99,7 @@
#define FSL_SAI_MAXBURST_RX 6

struct fsl_sai {
- struct clk *clk;
-
- void __iomem *base;
+ struct regmap *regmap;

bool big_endian_regs;
bool big_endian_data;
--
1.8.4



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