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sh, mmc: Use defines when setting CE_CLK_CTRL 

The 16-19th bits of CE_CLK_CTRL set the
MMC clock frequency.

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 2010-11-27 00:11:55 +00:00 committed by Paul Mundt
parent 1ae0affedc
commit 22efa0fee3
1 changed files with 9 additions and 8 deletions
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17
include/linux/mmc/sh_mmcif.h
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@ -70,6 +70,9 @@ struct sh_mmcif_plat_data {
#define CLK_ENABLE (1 << 24) /* 1: output mmc clock */
#define CLK_CLEAR ((1 << 19) | (1 << 18) | (1 << 17) | (1 << 16))
#define CLK_SUP_PCLK ((1 << 19) | (1 << 18) | (1 << 17) | (1 << 16))
#define CLKDIV_4 (1<<16) /* mmc clock frequency.
* n: bus clock/(2^(n+1)) */
#define CLKDIV_256 (7<<16) /* mmc clock frequency. (see above) */
#define SRSPTO_256 ((1 << 13) | (0 << 12)) /* resp timeout */
#define SRBSYTO_29 ((1 << 11) | (1 << 10) | \
(1 << 9) | (1 << 8)) /* resp busy timeout */
@ -178,14 +181,10 @@ static inline void sh_mmcif_boot_init(void __iomem *base)
/* Set block size in MMCIF hardware */
sh_mmcif_writel(base, MMCIF_CE_BLOCK_SET, SH_MMCIF_BBS);
/* Enable the clock, set it to Bus clock/256 (about 325Khz).
* It is unclear where 0x70000 comes from or if it is even needed.
* It is there for byte-compatibility with code that is known to
* work.
*/
/* Enable the clock, set it to Bus clock/256 (about 325Khz). */
sh_mmcif_writel(base, MMCIF_CE_CLK_CTRL,
CLK_ENABLE | SRSPTO_256 | SRBSYTO_29 | SRWDTO_29 |
SCCSTO_29 | 0x70000);
CLK_ENABLE | CLKDIV_256 | SRSPTO_256 |
SRBSYTO_29 | SRWDTO_29 | SCCSTO_29);
/* CMD0 */
sh_mmcif_boot_cmd(base, 0x00000040, 0);
@ -210,7 +209,9 @@ static inline void sh_mmcif_boot_slurp(void __iomem *base,
unsigned long tmp;
/* In data transfer mode: Set clock to Bus clock/4 (about 20Mhz) */
sh_mmcif_writel(base, MMCIF_CE_CLK_CTRL, 0x01012fff);
sh_mmcif_writel(base, MMCIF_CE_CLK_CTRL,
CLK_ENABLE | CLKDIV_4 | SRSPTO_256 |
SRBSYTO_29 | SRWDTO_29 | SCCSTO_29);
/* CMD9 - Get CSD */
sh_mmcif_boot_cmd(base, 0x09806000, 0x00010000);