[PATCH v4 11/38] mmc: dw_mmc: Replace fifoth_val property with fifo-depth

Sam Protsenko semen.protsenko at linaro.org
Thu Jul 25 22:44:53 CEST 2024


Replace fifoth_val property with its fifo-depth counterpart in all DW
MMC drivers. fifo-depth is a common property used in upstream Linux
kernel. The FIFOTH register value will be calculated using fifo-depth
value in DW MMC core (dw_mmc.c). This change reduces code duplication in
platform drivers, and pulls common FIFOTH register value calculation
into core dw_mmc driver where it belongs.

No functional change.

Signed-off-by: Sam Protsenko <semen.protsenko at linaro.org>
---
Changes in v4:
  - (none)

Changes in v3:
  - (none)

Changes in v2:
  - (none)

 drivers/mmc/dw_mmc.c          | 21 +++++++++++++--------
 drivers/mmc/exynos_dw_mmc.c   | 10 +++++-----
 drivers/mmc/ftsdc010_mci.h    |  1 -
 drivers/mmc/hi6220_dw_mmc.c   |  7 +++----
 drivers/mmc/nexell_dw_mmc.c   |  5 +----
 drivers/mmc/rockchip_dw_mmc.c |  5 +----
 drivers/mmc/snps_dw_mmc.c     |  6 ++----
 drivers/mmc/socfpga_dw_mmc.c  |  4 ++--
 include/dwmmc.h               |  4 ++--
 9 files changed, 29 insertions(+), 34 deletions(-)

diff --git a/drivers/mmc/dw_mmc.c b/drivers/mmc/dw_mmc.c
index 55eb8a54f594..47dcc37c2c7c 100644
--- a/drivers/mmc/dw_mmc.c
+++ b/drivers/mmc/dw_mmc.c
@@ -218,8 +218,6 @@ static unsigned int dwmci_get_timeout(struct mmc *mmc, const unsigned int size)
 static int dwmci_data_transfer_fifo(struct dwmci_host *host,
 				    struct mmc_data *data, u32 mask)
 {
-	const u32 fifo_depth = (((host->fifoth_val & RX_WMARK_MASK) >>
-				 RX_WMARK_SHIFT) + 1) * 2;
 	const u32 int_rx = mask & (DWMCI_INTMSK_RXDR | DWMCI_INTMSK_DTO);
 	const u32 int_tx = mask & DWMCI_INTMSK_TXDR;
 	int ret = 0;
@@ -254,8 +252,8 @@ static int dwmci_data_transfer_fifo(struct dwmci_host *host,
 			if (ret < 0)
 				break;
 
-			len = fifo_depth - ((len >> DWMCI_FIFO_SHIFT) &
-					    DWMCI_FIFO_MASK);
+			len = host->fifo_depth - ((len >> DWMCI_FIFO_SHIFT) &
+						  DWMCI_FIFO_MASK);
 			len = min(size, len);
 			for (i = 0; i < len; i++)
 				dwmci_writel(host, DWMCI_DATA, *buf++);
@@ -655,16 +653,23 @@ static int dwmci_set_ios(struct mmc *mmc)
 
 static void dwmci_init_fifo(struct dwmci_host *host)
 {
-	if (!host->fifoth_val) {
+	u32 fifo_thr, fifoth_val;
+
+	if (!host->fifo_depth) {
 		u32 fifo_size;
 
+		/*
+		 * Automatically detect FIFO depth from FIFOTH register.
+		 * Power-on value of RX_WMark is FIFO_DEPTH-1.
+		 */
 		fifo_size = dwmci_readl(host, DWMCI_FIFOTH);
 		fifo_size = ((fifo_size & RX_WMARK_MASK) >> RX_WMARK_SHIFT) + 1;
-		host->fifoth_val = MSIZE(0x2) | RX_WMARK(fifo_size / 2 - 1) |
-				   TX_WMARK(fifo_size / 2);
+		host->fifo_depth = fifo_size;
 	}
 
-	dwmci_writel(host, DWMCI_FIFOTH, host->fifoth_val);
+	fifo_thr = host->fifo_depth / 2;
+	fifoth_val = MSIZE(0x2) | RX_WMARK(fifo_thr - 1) | TX_WMARK(fifo_thr);
+	dwmci_writel(host, DWMCI_FIFOTH, fifoth_val);
 }
 
 static void dwmci_init_dma(struct dwmci_host *host)
diff --git a/drivers/mmc/exynos_dw_mmc.c b/drivers/mmc/exynos_dw_mmc.c
index a51f762988da..377c9e6d90b9 100644
--- a/drivers/mmc/exynos_dw_mmc.c
+++ b/drivers/mmc/exynos_dw_mmc.c
@@ -150,8 +150,8 @@ static int do_dwmci_init(struct dwmci_host *host)
 	return exynos_dwmci_core_init(host);
 }
 
-static int exynos_dwmci_get_config(const void *blob, int node,
-				   struct dwmci_host *host,
+static int exynos_dwmci_get_config(struct udevice *dev, const void *blob,
+				   int node, struct dwmci_host *host,
 				   struct dwmci_exynos_priv_data *priv)
 {
 	int err = 0;
@@ -200,7 +200,7 @@ static int exynos_dwmci_get_config(const void *blob, int node,
 			priv->sdr_timing = DWMMC_MMC2_SDR_TIMING_VAL;
 	}
 
-	host->fifoth_val = fdtdec_get_int(blob, node, "fifoth_val", 0);
+	host->fifo_depth = dev_read_u32_default(dev, "fifo-depth", 0);
 	host->bus_hz = fdtdec_get_int(blob, node, "bus_hz", 0);
 	host->div = fdtdec_get_int(blob, node, "div", 0);
 
@@ -216,8 +216,8 @@ static int exynos_dwmmc_probe(struct udevice *dev)
 	struct dwmci_host *host = &priv->host;
 	int err;
 
-	err = exynos_dwmci_get_config(gd->fdt_blob, dev_of_offset(dev), host,
-				      priv);
+	err = exynos_dwmci_get_config(dev, gd->fdt_blob, dev_of_offset(dev),
+				      host, priv);
 	if (err)
 		return err;
 	err = do_dwmci_init(host);
diff --git a/drivers/mmc/ftsdc010_mci.h b/drivers/mmc/ftsdc010_mci.h
index 782d92be2f5f..36187cfa04f6 100644
--- a/drivers/mmc/ftsdc010_mci.h
+++ b/drivers/mmc/ftsdc010_mci.h
@@ -28,7 +28,6 @@ struct ftsdc010_chip {
 	int dev_index;
 	int dev_id;
 	int buswidth;
-	u32 fifoth_val;
 	struct mmc *mmc;
 	void *priv;
 	bool fifo_mode;
diff --git a/drivers/mmc/hi6220_dw_mmc.c b/drivers/mmc/hi6220_dw_mmc.c
index c68a9157bfcc..0302f5c296b9 100644
--- a/drivers/mmc/hi6220_dw_mmc.c
+++ b/drivers/mmc/hi6220_dw_mmc.c
@@ -36,7 +36,7 @@ struct hi6220_dwmmc_priv_data {
 struct hisi_mmc_data {
 	unsigned int clock;
 	bool use_fifo;
-	u32 fifoth_val;
+	u32 fifo_depth;
 };
 
 static int hi6220_dwmmc_of_to_plat(struct udevice *dev)
@@ -125,7 +125,7 @@ static int hi6220_dwmmc_probe(struct udevice *dev)
 	host->mmc = &plat->mmc;
 
 	host->fifo_mode = mmc_data->use_fifo;
-	host->fifoth_val = mmc_data->fifoth_val;
+	host->fifo_depth = mmc_data->fifo_depth;
 	host->mmc->priv = &priv->host;
 	upriv->mmc = host->mmc;
 	host->mmc->dev = dev;
@@ -158,8 +158,7 @@ static const struct hisi_mmc_data hi6220_mmc_data = {
 static const struct hisi_mmc_data hi3798mv2x_mmc_data = {
 	.clock = 50000000,
 	.use_fifo = false,
-	// FIFO depth is 256
-	.fifoth_val = MSIZE(4) | RX_WMARK(0x7f) | TX_WMARK(0x80),
+	.fifo_depth = 256,
 };
 
 static const struct udevice_id hi6220_dwmmc_ids[] = {
diff --git a/drivers/mmc/nexell_dw_mmc.c b/drivers/mmc/nexell_dw_mmc.c
index 2e1ce54c7d50..80df617e07e9 100644
--- a/drivers/mmc/nexell_dw_mmc.c
+++ b/drivers/mmc/nexell_dw_mmc.c
@@ -186,10 +186,7 @@ static int nexell_dwmmc_probe(struct udevice *dev)
 	struct dwmci_host *host = &priv->host;
 	struct udevice *pwr_dev __maybe_unused;
 
-	host->fifoth_val = MSIZE(0x2) |
-		RX_WMARK(priv->fifo_size / 2 - 1) |
-		TX_WMARK(priv->fifo_size / 2);
-
+	host->fifo_depth = priv->fifo_size;
 	host->fifo_mode = priv->fifo_mode;
 
 	dwmci_setup_cfg(&plat->cfg, host, priv->max_freq, priv->min_freq);
diff --git a/drivers/mmc/rockchip_dw_mmc.c b/drivers/mmc/rockchip_dw_mmc.c
index 1a10b7057a47..b2a46a95481c 100644
--- a/drivers/mmc/rockchip_dw_mmc.c
+++ b/drivers/mmc/rockchip_dw_mmc.c
@@ -138,10 +138,7 @@ static int rockchip_dwmmc_probe(struct udevice *dev)
 	if (ret < 0)
 		return ret;
 #endif
-	host->fifoth_val = MSIZE(0x2) |
-		RX_WMARK(priv->fifo_depth / 2 - 1) |
-		TX_WMARK(priv->fifo_depth / 2);
-
+	host->fifo_depth = priv->fifo_depth;
 	host->fifo_mode = priv->fifo_mode;
 
 #if CONFIG_IS_ENABLED(MMC_PWRSEQ)
diff --git a/drivers/mmc/snps_dw_mmc.c b/drivers/mmc/snps_dw_mmc.c
index 9bdbe5070b1d..f30331e51f7e 100644
--- a/drivers/mmc/snps_dw_mmc.c
+++ b/drivers/mmc/snps_dw_mmc.c
@@ -81,7 +81,7 @@ static int snps_dwmmc_of_to_plat(struct udevice *dev)
 	host->ioaddr = dev_read_addr_ptr(dev);
 
 	/*
-	 * If fifo-depth is unset don't set fifoth_val - we will try to
+	 * If fifo-depth is unset don't set fifo_depth - we will try to
 	 * auto detect it.
 	 */
 	ret = dev_read_u32(dev, "fifo-depth", &fifo_depth);
@@ -89,9 +89,7 @@ static int snps_dwmmc_of_to_plat(struct udevice *dev)
 		if (fifo_depth < FIFO_MIN || fifo_depth > FIFO_MAX)
 			return -EINVAL;
 
-		host->fifoth_val = MSIZE(0x2) |
-				   RX_WMARK(fifo_depth / 2 - 1) |
-				   TX_WMARK(fifo_depth / 2);
+		host->fifo_depth = fifo_depth;
 	}
 
 	host->buswidth = dev_read_u32_default(dev, "bus-width", 4);
diff --git a/drivers/mmc/socfpga_dw_mmc.c b/drivers/mmc/socfpga_dw_mmc.c
index f738019b8357..3147d3019c0a 100644
--- a/drivers/mmc/socfpga_dw_mmc.c
+++ b/drivers/mmc/socfpga_dw_mmc.c
@@ -134,8 +134,8 @@ static int socfpga_dwmmc_of_to_plat(struct udevice *dev)
 	 * We only have one dwmmc block on gen5 SoCFPGA.
 	 */
 	host->dev_index = 0;
-	host->fifoth_val = MSIZE(0x2) |
-		RX_WMARK(fifo_depth / 2 - 1) | TX_WMARK(fifo_depth / 2);
+
+	host->fifo_depth = fifo_depth;
 	priv->drvsel = fdtdec_get_uint(gd->fdt_blob, dev_of_offset(dev),
 				       "drvsel", 3);
 	priv->smplsel = fdtdec_get_uint(gd->fdt_blob, dev_of_offset(dev),
diff --git a/include/dwmmc.h b/include/dwmmc.h
index de18fda68ac8..7bb456e792b4 100644
--- a/include/dwmmc.h
+++ b/include/dwmmc.h
@@ -187,7 +187,7 @@ struct dwmci_idmac_regs {
  * @dev_index:	Arbitrary device index for use by controller
  * @dev_id:	Arbitrary device ID for use by controller
  * @buswidth:	Bus width in bits (8 or 4)
- * @fifoth_val:	Value for FIFOTH register (or 0 to leave unset)
+ * @fifo_depth:	Depth of FIFO, bytes (or 0 for automatic detection)
  * @mmc:	Pointer to generic MMC structure for this device
  * @priv:	Private pointer for use by controller
  * @dma_64bit_address: Whether DMA supports 64-bit address mode or not
@@ -204,7 +204,7 @@ struct dwmci_host {
 	int dev_index;
 	int dev_id;
 	int buswidth;
-	u32 fifoth_val;
+	u32 fifo_depth;
 	struct mmc *mmc;
 	void *priv;
 
-- 
2.39.2



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