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mmc: uniphier-sd: Add support for 64bit FIFO

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The Renesas RCar Gen3 contains the same controller, originally
Matsushita. This patch adds support for handling of the 64bit
FIFO on this controller.

Signed-off-by: Marek Vasut <marek.vasut+renesas@gmail.com>
Cc: Masahiro Yamada <yamada.masahiro@socionext.com>
Cc: Jaehoon Chung <jh80.chung@samsung.com>
This commit is contained in:
Marek Vasut 2017-07-21 23:24:34 +02:00 committed by Jaehoon Chung
parent 1c99f68e93
commit 484d9db4f9
1 changed files with 74 additions and 10 deletions
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84
drivers/mmc/uniphier-sd.c
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@ -135,6 +135,23 @@ struct uniphier_sd_priv {
#define UNIPHIER_SD_CAP_64BIT BIT(3) /* Controller is 64bit */
};
static u64 uniphier_sd_readq(struct uniphier_sd_priv *priv, const u32 reg)
{
if (priv->caps & UNIPHIER_SD_CAP_64BIT)
return readq(priv->regbase + (reg << 1));
else
return readq(priv->regbase + reg);
}
static void uniphier_sd_writeq(struct uniphier_sd_priv *priv,
const u64 val, const u32 reg)
{
if (priv->caps & UNIPHIER_SD_CAP_64BIT)
writeq(val, priv->regbase + (reg << 1));
else
writeq(val, priv->regbase + reg);
}
static u32 uniphier_sd_readl(struct uniphier_sd_priv *priv, const u32 reg)
{
if (priv->caps & UNIPHIER_SD_CAP_64BIT)
@ -248,12 +265,37 @@ static int uniphier_sd_pio_read_one_block(struct udevice *dev, u32 **pbuf,
uniphier_sd_writel(priv, 0, UNIPHIER_SD_INFO2);
if (likely(IS_ALIGNED((unsigned long)*pbuf, 4))) {
for (i = 0; i < blocksize / 4; i++)
*(*pbuf)++ = uniphier_sd_readl(priv, UNIPHIER_SD_BUF);
if (priv->caps & UNIPHIER_SD_CAP_64BIT) {
for (i = 0; i < blocksize / 8; i++) {
u64 data;
data = uniphier_sd_readq(priv,
UNIPHIER_SD_BUF);
*(*pbuf)++ = data;
*(*pbuf)++ = data >> 32;
}
} else {
for (i = 0; i < blocksize / 4; i++) {
u32 data;
data = uniphier_sd_readl(priv, UNIPHIER_SD_BUF);
*(*pbuf)++ = data;
}
}
} else {
for (i = 0; i < blocksize / 4; i++)
put_unaligned(uniphier_sd_readl(priv, UNIPHIER_SD_BUF),
(*pbuf)++);
if (priv->caps & UNIPHIER_SD_CAP_64BIT) {
for (i = 0; i < blocksize / 8; i++) {
u64 data;
data = uniphier_sd_readq(priv,
UNIPHIER_SD_BUF);
put_unaligned(data, (*pbuf)++);
put_unaligned(data >> 32, (*pbuf)++);
}
} else {
for (i = 0; i < blocksize / 4; i++) {
u32 data;
data = uniphier_sd_readl(priv, UNIPHIER_SD_BUF);
put_unaligned(data, (*pbuf)++);
}
}
}
return 0;
@ -274,12 +316,34 @@ static int uniphier_sd_pio_write_one_block(struct udevice *dev,
uniphier_sd_writel(priv, 0, UNIPHIER_SD_INFO2);
if (likely(IS_ALIGNED((unsigned long)*pbuf, 4))) {
for (i = 0; i < blocksize / 4; i++)
uniphier_sd_writel(priv, *(*pbuf)++, UNIPHIER_SD_BUF);
if (priv->caps & UNIPHIER_SD_CAP_64BIT) {
for (i = 0; i < blocksize / 8; i++) {
u64 data = *(*pbuf)++;
data |= (u64)*(*pbuf)++ << 32;
uniphier_sd_writeq(priv, data,
UNIPHIER_SD_BUF);
}
} else {
for (i = 0; i < blocksize / 4; i++) {
uniphier_sd_writel(priv, *(*pbuf)++,
UNIPHIER_SD_BUF);
}
}
} else {
for (i = 0; i < blocksize / 4; i++)
uniphier_sd_writel(priv, get_unaligned((*pbuf)++),
UNIPHIER_SD_BUF);
if (priv->caps & UNIPHIER_SD_CAP_64BIT) {
for (i = 0; i < blocksize / 8; i++) {
u64 data = get_unaligned((*pbuf)++);
data |= (u64)get_unaligned((*pbuf)++) << 32;
uniphier_sd_writeq(priv, data,
UNIPHIER_SD_BUF);
}
} else {
for (i = 0; i < blocksize / 4; i++) {
u32 data = get_unaligned((*pbuf)++);
uniphier_sd_writel(priv, data,
UNIPHIER_SD_BUF);
}
}
}
return 0;