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mmc, sh: Correct value for reset

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This resolves a regression that I introduced in
"mmc, sh: Move constants to sh_mmcif.h". Having
examined the manual and tested the code on an AP4EVB board
it seems that the correct sequence is.

1) Write 1 to bit 31 and zeros to all other bits
2) Write zero to all bits

Cc: Yusuke Goda <yusuke.goda.sx@renesas.com>
Cc: Magnus Damm <magnus.damm@gmail.com>
Signed-off-by: Simon Horman <horms@verge.net.au>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
This commit is contained in:
Simon Horman 2010-11-26 23:02:58 +00:00 committed by Paul Mundt
parent 7211a1bae6
commit 1ae0affedc
1 changed files with 3 additions and 6 deletions
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9
include/linux/mmc/sh_mmcif.h
View file

@ -80,7 +80,7 @@ struct sh_mmcif_plat_data {
/* CE_VERSION */
#define SOFT_RST_ON (1 << 31)
#define SOFT_RST_OFF ~SOFT_RST_ON
#define SOFT_RST_OFF 0
static inline u32 sh_mmcif_readl(void __iomem *addr, int reg)
{
@ -168,12 +168,9 @@ static inline int sh_mmcif_boot_do_read(void __iomem *base,
static inline void sh_mmcif_boot_init(void __iomem *base)
{
unsigned long tmp;
/* reset */
tmp = sh_mmcif_readl(base, MMCIF_CE_VERSION);
sh_mmcif_writel(base, MMCIF_CE_VERSION, tmp | SOFT_RST_ON);
sh_mmcif_writel(base, MMCIF_CE_VERSION, tmp & SOFT_RST_OFF);
sh_mmcif_writel(base, MMCIF_CE_VERSION, SOFT_RST_ON);
sh_mmcif_writel(base, MMCIF_CE_VERSION, SOFT_RST_OFF);
/* byte swap */
sh_mmcif_writel(base, MMCIF_CE_BUF_ACC, BUF_ACC_ATYP);