[U-Boot] [PATCH V3 1/5] mmc: uniphier-sd: Factor out register IO
Marek Vasut
marek.vasut at gmail.com
Sun Aug 20 15:11:15 UTC 2017
This patch prepares the driver to support controller(s) with registers
at locations shifted by constant. Pull out the readl()/writel() from
the driver into separate functions, where the adjustment of the register
offset can be easily contained.
Signed-off-by: Marek Vasut <marek.vasut+renesas at gmail.com>
Cc: Masahiro Yamada <yamada.masahiro at socionext.com>
Cc: Jaehoon Chung <jh80.chung at samsung.com>
---
V2: Use unsigned int for the reg argument
V3: Remove const ...
---
drivers/mmc/uniphier-sd.c | 115 +++++++++++++++++++++++++---------------------
1 file changed, 63 insertions(+), 52 deletions(-)
diff --git a/drivers/mmc/uniphier-sd.c b/drivers/mmc/uniphier-sd.c
index e272b14153..cb53b28737 100644
--- a/drivers/mmc/uniphier-sd.c
+++ b/drivers/mmc/uniphier-sd.c
@@ -134,6 +134,17 @@ struct uniphier_sd_priv {
#define UNIPHIER_SD_CAP_DIV1024 BIT(2) /* divisor 1024 is available */
};
+static u32 uniphier_sd_readl(struct uniphier_sd_priv *priv, unsigned int reg)
+{
+ return readl(priv->regbase + reg);
+}
+
+static void uniphier_sd_writel(struct uniphier_sd_priv *priv,
+ u32 val, unsigned int reg)
+{
+ writel(val, priv->regbase + reg);
+}
+
static dma_addr_t __dma_map_single(void *ptr, size_t size,
enum dma_data_direction dir)
{
@@ -157,7 +168,7 @@ static void __dma_unmap_single(dma_addr_t addr, size_t size,
static int uniphier_sd_check_error(struct udevice *dev)
{
struct uniphier_sd_priv *priv = dev_get_priv(dev);
- u32 info2 = readl(priv->regbase + UNIPHIER_SD_INFO2);
+ u32 info2 = uniphier_sd_readl(priv, UNIPHIER_SD_INFO2);
if (info2 & UNIPHIER_SD_INFO2_ERR_RTO) {
/*
@@ -195,7 +206,7 @@ static int uniphier_sd_wait_for_irq(struct udevice *dev, unsigned int reg,
long wait = 1000000;
int ret;
- while (!(readl(priv->regbase + reg) & flag)) {
+ while (!(uniphier_sd_readl(priv, reg) & flag)) {
if (wait-- < 0) {
dev_err(dev, "timeout\n");
return -ETIMEDOUT;
@@ -227,14 +238,14 @@ static int uniphier_sd_pio_read_one_block(struct udevice *dev, u32 **pbuf,
* Clear the status flag _before_ read the buffer out because
* UNIPHIER_SD_INFO2_BRE is edge-triggered, not level-triggered.
*/
- writel(0, priv->regbase + UNIPHIER_SD_INFO2);
+ uniphier_sd_writel(priv, 0, UNIPHIER_SD_INFO2);
if (likely(IS_ALIGNED((unsigned long)*pbuf, 4))) {
for (i = 0; i < blocksize / 4; i++)
- *(*pbuf)++ = readl(priv->regbase + UNIPHIER_SD_BUF);
+ *(*pbuf)++ = uniphier_sd_readl(priv, UNIPHIER_SD_BUF);
} else {
for (i = 0; i < blocksize / 4; i++)
- put_unaligned(readl(priv->regbase + UNIPHIER_SD_BUF),
+ put_unaligned(uniphier_sd_readl(priv, UNIPHIER_SD_BUF),
(*pbuf)++);
}
@@ -253,15 +264,15 @@ static int uniphier_sd_pio_write_one_block(struct udevice *dev,
if (ret)
return ret;
- writel(0, priv->regbase + UNIPHIER_SD_INFO2);
+ uniphier_sd_writel(priv, 0, UNIPHIER_SD_INFO2);
if (likely(IS_ALIGNED((unsigned long)*pbuf, 4))) {
for (i = 0; i < blocksize / 4; i++)
- writel(*(*pbuf)++, priv->regbase + UNIPHIER_SD_BUF);
+ uniphier_sd_writel(priv, *(*pbuf)++, UNIPHIER_SD_BUF);
} else {
for (i = 0; i < blocksize / 4; i++)
- writel(get_unaligned((*pbuf)++),
- priv->regbase + UNIPHIER_SD_BUF);
+ uniphier_sd_writel(priv, get_unaligned((*pbuf)++),
+ UNIPHIER_SD_BUF);
}
return 0;
@@ -292,22 +303,22 @@ static void uniphier_sd_dma_start(struct uniphier_sd_priv *priv,
{
u32 tmp;
- writel(0, priv->regbase + UNIPHIER_SD_DMA_INFO1);
- writel(0, priv->regbase + UNIPHIER_SD_DMA_INFO2);
+ uniphier_sd_writel(priv, 0, UNIPHIER_SD_DMA_INFO1);
+ uniphier_sd_writel(priv, 0, UNIPHIER_SD_DMA_INFO2);
/* enable DMA */
- tmp = readl(priv->regbase + UNIPHIER_SD_EXTMODE);
+ tmp = uniphier_sd_readl(priv, UNIPHIER_SD_EXTMODE);
tmp |= UNIPHIER_SD_EXTMODE_DMA_EN;
- writel(tmp, priv->regbase + UNIPHIER_SD_EXTMODE);
+ uniphier_sd_writel(priv, tmp, UNIPHIER_SD_EXTMODE);
- writel(dma_addr & U32_MAX, priv->regbase + UNIPHIER_SD_DMA_ADDR_L);
+ uniphier_sd_writel(priv, dma_addr & U32_MAX, UNIPHIER_SD_DMA_ADDR_L);
/* suppress the warning "right shift count >= width of type" */
dma_addr >>= min_t(int, 32, 8 * sizeof(dma_addr));
- writel(dma_addr & U32_MAX, priv->regbase + UNIPHIER_SD_DMA_ADDR_H);
+ uniphier_sd_writel(priv, dma_addr & U32_MAX, UNIPHIER_SD_DMA_ADDR_H);
- writel(UNIPHIER_SD_DMA_CTL_START, priv->regbase + UNIPHIER_SD_DMA_CTL);
+ uniphier_sd_writel(priv, UNIPHIER_SD_DMA_CTL_START, UNIPHIER_SD_DMA_CTL);
}
static int uniphier_sd_dma_wait_for_irq(struct udevice *dev, u32 flag,
@@ -316,7 +327,7 @@ static int uniphier_sd_dma_wait_for_irq(struct udevice *dev, u32 flag,
struct uniphier_sd_priv *priv = dev_get_priv(dev);
long wait = 1000000 + 10 * blocks;
- while (!(readl(priv->regbase + UNIPHIER_SD_DMA_INFO1) & flag)) {
+ while (!(uniphier_sd_readl(priv, UNIPHIER_SD_DMA_INFO1) & flag)) {
if (wait-- < 0) {
dev_err(dev, "timeout during DMA\n");
return -ETIMEDOUT;
@@ -325,7 +336,7 @@ static int uniphier_sd_dma_wait_for_irq(struct udevice *dev, u32 flag,
udelay(10);
}
- if (readl(priv->regbase + UNIPHIER_SD_DMA_INFO2)) {
+ if (uniphier_sd_readl(priv, UNIPHIER_SD_DMA_INFO2)) {
dev_err(dev, "error during DMA\n");
return -EIO;
}
@@ -343,7 +354,7 @@ static int uniphier_sd_dma_xfer(struct udevice *dev, struct mmc_data *data)
u32 poll_flag, tmp;
int ret;
- tmp = readl(priv->regbase + UNIPHIER_SD_DMA_MODE);
+ tmp = uniphier_sd_readl(priv, UNIPHIER_SD_DMA_MODE);
if (data->flags & MMC_DATA_READ) {
buf = data->dest;
@@ -357,7 +368,7 @@ static int uniphier_sd_dma_xfer(struct udevice *dev, struct mmc_data *data)
tmp &= ~UNIPHIER_SD_DMA_MODE_DIR_RD;
}
- writel(tmp, priv->regbase + UNIPHIER_SD_DMA_MODE);
+ uniphier_sd_writel(priv, tmp, UNIPHIER_SD_DMA_MODE);
dma_addr = __dma_map_single(buf, len, dir);
@@ -396,27 +407,27 @@ static int uniphier_sd_send_cmd(struct udevice *dev, struct mmc_cmd *cmd,
int ret;
u32 tmp;
- if (readl(priv->regbase + UNIPHIER_SD_INFO2) & UNIPHIER_SD_INFO2_CBSY) {
+ if (uniphier_sd_readl(priv, UNIPHIER_SD_INFO2) & UNIPHIER_SD_INFO2_CBSY) {
dev_err(dev, "command busy\n");
return -EBUSY;
}
/* clear all status flags */
- writel(0, priv->regbase + UNIPHIER_SD_INFO1);
- writel(0, priv->regbase + UNIPHIER_SD_INFO2);
+ uniphier_sd_writel(priv, 0, UNIPHIER_SD_INFO1);
+ uniphier_sd_writel(priv, 0, UNIPHIER_SD_INFO2);
/* disable DMA once */
- tmp = readl(priv->regbase + UNIPHIER_SD_EXTMODE);
+ tmp = uniphier_sd_readl(priv, UNIPHIER_SD_EXTMODE);
tmp &= ~UNIPHIER_SD_EXTMODE_DMA_EN;
- writel(tmp, priv->regbase + UNIPHIER_SD_EXTMODE);
+ uniphier_sd_writel(priv, tmp, UNIPHIER_SD_EXTMODE);
- writel(cmd->cmdarg, priv->regbase + UNIPHIER_SD_ARG);
+ uniphier_sd_writel(priv, cmd->cmdarg, UNIPHIER_SD_ARG);
tmp = cmd->cmdidx;
if (data) {
- writel(data->blocksize, priv->regbase + UNIPHIER_SD_SIZE);
- writel(data->blocks, priv->regbase + UNIPHIER_SD_SECCNT);
+ uniphier_sd_writel(priv, data->blocksize, UNIPHIER_SD_SIZE);
+ uniphier_sd_writel(priv, data->blocks, UNIPHIER_SD_SECCNT);
/* Do not send CMD12 automatically */
tmp |= UNIPHIER_SD_CMD_NOSTOP | UNIPHIER_SD_CMD_DATA;
@@ -457,7 +468,7 @@ static int uniphier_sd_send_cmd(struct udevice *dev, struct mmc_cmd *cmd,
dev_dbg(dev, "sending CMD%d (SD_CMD=%08x, SD_ARG=%08x)\n",
cmd->cmdidx, tmp, cmd->cmdarg);
- writel(tmp, priv->regbase + UNIPHIER_SD_CMD);
+ uniphier_sd_writel(priv, tmp, UNIPHIER_SD_CMD);
ret = uniphier_sd_wait_for_irq(dev, UNIPHIER_SD_INFO1,
UNIPHIER_SD_INFO1_RSP);
@@ -465,10 +476,10 @@ static int uniphier_sd_send_cmd(struct udevice *dev, struct mmc_cmd *cmd,
return ret;
if (cmd->resp_type & MMC_RSP_136) {
- u32 rsp_127_104 = readl(priv->regbase + UNIPHIER_SD_RSP76);
- u32 rsp_103_72 = readl(priv->regbase + UNIPHIER_SD_RSP54);
- u32 rsp_71_40 = readl(priv->regbase + UNIPHIER_SD_RSP32);
- u32 rsp_39_8 = readl(priv->regbase + UNIPHIER_SD_RSP10);
+ u32 rsp_127_104 = uniphier_sd_readl(priv, UNIPHIER_SD_RSP76);
+ u32 rsp_103_72 = uniphier_sd_readl(priv, UNIPHIER_SD_RSP54);
+ u32 rsp_71_40 = uniphier_sd_readl(priv, UNIPHIER_SD_RSP32);
+ u32 rsp_39_8 = uniphier_sd_readl(priv, UNIPHIER_SD_RSP10);
cmd->response[0] = ((rsp_127_104 & 0x00ffffff) << 8) |
((rsp_103_72 & 0xff000000) >> 24);
@@ -479,7 +490,7 @@ static int uniphier_sd_send_cmd(struct udevice *dev, struct mmc_cmd *cmd,
cmd->response[3] = (rsp_39_8 & 0xffffff) << 8;
} else {
/* bit 39-8 */
- cmd->response[0] = readl(priv->regbase + UNIPHIER_SD_RSP10);
+ cmd->response[0] = uniphier_sd_readl(priv, UNIPHIER_SD_RSP10);
}
if (data) {
@@ -518,10 +529,10 @@ static int uniphier_sd_set_bus_width(struct uniphier_sd_priv *priv,
return -EINVAL;
}
- tmp = readl(priv->regbase + UNIPHIER_SD_OPTION);
+ tmp = uniphier_sd_readl(priv, UNIPHIER_SD_OPTION);
tmp &= ~UNIPHIER_SD_OPTION_WIDTH_MASK;
tmp |= val;
- writel(tmp, priv->regbase + UNIPHIER_SD_OPTION);
+ uniphier_sd_writel(priv, tmp, UNIPHIER_SD_OPTION);
return 0;
}
@@ -531,12 +542,12 @@ static void uniphier_sd_set_ddr_mode(struct uniphier_sd_priv *priv,
{
u32 tmp;
- tmp = readl(priv->regbase + UNIPHIER_SD_IF_MODE);
+ tmp = uniphier_sd_readl(priv, UNIPHIER_SD_IF_MODE);
if (mmc->ddr_mode)
tmp |= UNIPHIER_SD_IF_MODE_DDR;
else
tmp &= ~UNIPHIER_SD_IF_MODE_DDR;
- writel(tmp, priv->regbase + UNIPHIER_SD_IF_MODE);
+ uniphier_sd_writel(priv, tmp, UNIPHIER_SD_IF_MODE);
}
static void uniphier_sd_set_clk_rate(struct uniphier_sd_priv *priv,
@@ -573,21 +584,21 @@ static void uniphier_sd_set_clk_rate(struct uniphier_sd_priv *priv,
else
val = UNIPHIER_SD_CLKCTL_DIV1024;
- tmp = readl(priv->regbase + UNIPHIER_SD_CLKCTL);
+ tmp = uniphier_sd_readl(priv, UNIPHIER_SD_CLKCTL);
if (tmp & UNIPHIER_SD_CLKCTL_SCLKEN &&
(tmp & UNIPHIER_SD_CLKCTL_DIV_MASK) == val)
return;
/* stop the clock before changing its rate to avoid a glitch signal */
tmp &= ~UNIPHIER_SD_CLKCTL_SCLKEN;
- writel(tmp, priv->regbase + UNIPHIER_SD_CLKCTL);
+ uniphier_sd_writel(priv, tmp, UNIPHIER_SD_CLKCTL);
tmp &= ~UNIPHIER_SD_CLKCTL_DIV_MASK;
tmp |= val | UNIPHIER_SD_CLKCTL_OFFEN;
- writel(tmp, priv->regbase + UNIPHIER_SD_CLKCTL);
+ uniphier_sd_writel(priv, tmp, UNIPHIER_SD_CLKCTL);
tmp |= UNIPHIER_SD_CLKCTL_SCLKEN;
- writel(tmp, priv->regbase + UNIPHIER_SD_CLKCTL);
+ uniphier_sd_writel(priv, tmp, UNIPHIER_SD_CLKCTL);
udelay(1000);
}
@@ -617,7 +628,7 @@ static int uniphier_sd_get_cd(struct udevice *dev)
if (priv->caps & UNIPHIER_SD_CAP_NONREMOVABLE)
return 1;
- return !!(readl(priv->regbase + UNIPHIER_SD_INFO1) &
+ return !!(uniphier_sd_readl(priv, UNIPHIER_SD_INFO1) &
UNIPHIER_SD_INFO1_CD);
}
@@ -632,28 +643,28 @@ static void uniphier_sd_host_init(struct uniphier_sd_priv *priv)
u32 tmp;
/* soft reset of the host */
- tmp = readl(priv->regbase + UNIPHIER_SD_SOFT_RST);
+ tmp = uniphier_sd_readl(priv, UNIPHIER_SD_SOFT_RST);
tmp &= ~UNIPHIER_SD_SOFT_RST_RSTX;
- writel(tmp, priv->regbase + UNIPHIER_SD_SOFT_RST);
+ uniphier_sd_writel(priv, tmp, UNIPHIER_SD_SOFT_RST);
tmp |= UNIPHIER_SD_SOFT_RST_RSTX;
- writel(tmp, priv->regbase + UNIPHIER_SD_SOFT_RST);
+ uniphier_sd_writel(priv, tmp, UNIPHIER_SD_SOFT_RST);
/* FIXME: implement eMMC hw_reset */
- writel(UNIPHIER_SD_STOP_SEC, priv->regbase + UNIPHIER_SD_STOP);
+ uniphier_sd_writel(priv, UNIPHIER_SD_STOP_SEC, UNIPHIER_SD_STOP);
/*
* Connected to 32bit AXI.
* This register dropped backward compatibility at version 0x10.
* Write an appropriate value depending on the IP version.
*/
- writel(priv->version >= 0x10 ? 0x00000101 : 0x00000000,
- priv->regbase + UNIPHIER_SD_HOST_MODE);
+ uniphier_sd_writel(priv, priv->version >= 0x10 ? 0x00000101 : 0x00000000,
+ UNIPHIER_SD_HOST_MODE);
if (priv->caps & UNIPHIER_SD_CAP_DMA_INTERNAL) {
- tmp = readl(priv->regbase + UNIPHIER_SD_DMA_MODE);
+ tmp = uniphier_sd_readl(priv, UNIPHIER_SD_DMA_MODE);
tmp |= UNIPHIER_SD_DMA_MODE_ADDR_INC;
- writel(tmp, priv->regbase + UNIPHIER_SD_DMA_MODE);
+ uniphier_sd_writel(priv, tmp, UNIPHIER_SD_DMA_MODE);
}
}
@@ -724,7 +735,7 @@ static int uniphier_sd_probe(struct udevice *dev)
NULL))
priv->caps |= UNIPHIER_SD_CAP_NONREMOVABLE;
- priv->version = readl(priv->regbase + UNIPHIER_SD_VERSION) &
+ priv->version = uniphier_sd_readl(priv, UNIPHIER_SD_VERSION) &
UNIPHIER_SD_VERSION_IP;
dev_dbg(dev, "version %x\n", priv->version);
if (priv->version >= 0x10) {
--
2.11.0
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