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mmc, sh: Move constants to sh_mmcif.h

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This moves some constants from sh_mmcif.c to sh_mmcif.h
so that they can be used in sh_mmcif_boot_init().

It also alters the definition of SOFT_RST_OFF from (0 << 31) to
~SOFT_RST_ON (= ~(1 << 31)). The former seems bogus.  The latter is
consistent with the code in sh_mmcif_boot_init().

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
2010-11-09 17:47:02 +09:00
committed by Paul Mundt
parent a7bcf21e60
commit da1d39e390
2 changed files with 34 additions and 28 deletions
Download Patch File Download Diff File Expand all files Collapse all files

39
include/linux/mmc/sh_mmcif.h
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@@ -59,6 +59,29 @@ struct sh_mmcif_plat_data {
#define MMCIF_CE_HOST_STS2 0x0000004C
#define MMCIF_CE_VERSION 0x0000007C
/* CE_BUF_ACC */
#define BUF_ACC_DMAWEN (1 << 25)
#define BUF_ACC_DMAREN (1 << 24)
#define BUF_ACC_BUSW_32 (0 << 17)
#define BUF_ACC_BUSW_16 (1 << 17)
#define BUF_ACC_ATYP (1 << 16)
/* CE_CLK_CTRL */
#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 SRSPTO_256 ((1 << 13) | (0 << 12)) /* resp timeout */
#define SRBSYTO_29 ((1 << 11) | (1 << 10) | \
(1 << 9) | (1 << 8)) /* resp busy timeout */
#define SRWDTO_29 ((1 << 7) | (1 << 6) | \
(1 << 5) | (1 << 4)) /* read/write timeout */
#define SCCSTO_29 ((1 << 3) | (1 << 2) | \
(1 << 1) | (1 << 0)) /* ccs timeout */
/* CE_VERSION */
#define SOFT_RST_ON (1 << 31)
#define SOFT_RST_OFF ~SOFT_RST_ON
static inline u32 sh_mmcif_readl(void __iomem *addr, int reg)
{
return readl(addr + reg);
@@ -149,17 +172,23 @@ static inline void sh_mmcif_boot_init(void __iomem *base)
/* reset */
tmp = sh_mmcif_readl(base, MMCIF_CE_VERSION);
sh_mmcif_writel(base, MMCIF_CE_VERSION, tmp | 0x80000000);
sh_mmcif_writel(base, MMCIF_CE_VERSION, tmp & ~0x80000000);
sh_mmcif_writel(base, MMCIF_CE_VERSION, tmp | SOFT_RST_ON);
sh_mmcif_writel(base, MMCIF_CE_VERSION, tmp & SOFT_RST_OFF);
/* byte swap */
sh_mmcif_writel(base, MMCIF_CE_BUF_ACC, 0x00010000);
sh_mmcif_writel(base, MMCIF_CE_BUF_ACC, BUF_ACC_ATYP);
/* 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)*/
sh_mmcif_writel(base, MMCIF_CE_CLK_CTRL, 0x01072fff);
/* 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.
*/
sh_mmcif_writel(base, MMCIF_CE_CLK_CTRL,
CLK_ENABLE | SRSPTO_256 | SRBSYTO_29 | SRWDTO_29 |
SCCSTO_29 | 0x70000);
/* CMD0 */
sh_mmcif_boot_cmd(base, 0x00000040, 0);