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SD init clock optimization

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git-svn-id: file:///Users/lillianskinner/Downloads/platinum/twl/twl_wrapsdk/trunk@134 4ee2a332-4b2b-5046-8439-1ba90f034370
This commit is contained in:
shirait 2007-06-26 07:19:23 +00:00
parent 15ea214365
commit 3d9d0f4829
2 changed files with 4 additions and 11 deletions
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11
build/libraries/devices/sdmc/ARM7/sdmc.c
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@ -304,13 +304,6 @@ static void SDCARD_Backup_port1(void)
static void i_sdmcEnable( void)
{
#if (TARGET_OS_CTR == 1)
#if (CTR_DEF_ENVIRONMENT_DSEMU == 1)
u16 ctrdg_reg;
ctrdg_reg = (*(vu16*)REG_EXMEMCNT_ADDR) & (0xFF00); /* ブレッドボード設定 */
*(vu16*)REG_EXMEMCNT_ADDR = (ctrdg_reg | 0); //ARM9優先、PHIにLo出力、1st:10,2nd:6サイクル
#endif
/*SD interrupt setting*/
// osInitIntrFlag();
// osClearInterruptPendingID( OS_INTR_ID_SD);
@ -625,7 +618,7 @@ SDMC_ERR_CODE sdmcReset( void)
#else
irq_core_flag = OS_DisableInterrupts(); /* 割込み禁止 */
#endif
*SDIF_CNT_L = 0x0402; //ラッパーレジスタ
*SDIF_CNT_L = (SDIF_CNT_FCLR | SDIF_CNT_USEFIFO); //ラッパーレジスタ
*SDIF_CNT_L = 0x0000; //ラッパーレジスタ
*SDIF_FDS_L = 0;
*SDIF_FSC_L = 1;
@ -675,7 +668,7 @@ static SDMC_ERR_CODE SDCARD_Layer_Init(void)
// init_io_exist = 0;
// init_mem_exist = 0;
SD_SetFPGA(SD_CLK_CTRL,(SD_CLK_CTRL_256)); /* SDクロックの周波数 144KHz */
SD_SetFPGA(SD_CLK_CTRL,(SD_CLK_CTRL_128)); /* SDクロックの周波数 261KHz(初期化時は100～400khz) */
SD_EnableClock(); /* SDカードのクロックをイネーブルにする */
/* SD I/F部ダミー80クロック(1mSec)転送待ち（タイマーで待ちを実装しても良い） */

4
include/twl/devices/sdmc/ARM7/sdmc.h
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@ -86,8 +86,8 @@ typedef struct
u16 SD_CLK_CTRL_VALUE;
u16 SD_OPTION_VALUE;
s16 OutFlag;
u16 port_no;
s16 OutFlag;
u16 port_no;
}
SDPortContext;