Merge branch 'common/mmcif' into rmobile/mmcif

1 files changed, 12 insertions, 14 deletions

diff --git a/include/linux/mmc/sh_mmcif.h b/include/linux/mmc/sh_mmcif.h
index f216a8879b58..44fc5348fd5d 100644
--- a/include/linux/mmc/sh_mmcif.h
+++ b/include/linux/mmc/sh_mmcif.h
@@ -77,6 +77,9 @@ 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 */
@@ -87,7 +90,7 @@ 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)
 {
@@ -175,12 +178,9 @@ 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);
@@ -188,14 +188,10 @@ 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);
@@ -220,7 +216,9 @@ 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);