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authorwdenk <wdenk>2003-11-17 21:45:27 +0000
committerwdenk <wdenk>2003-11-17 21:45:27 +0000
commitb4757cee52597ab5a67c30a1bf2a3208209e1ccb (patch)
tree65fb2ebe74d21d96ad26881d73e7a9e5a1f0e849 /board/trab/flash.c
parent5bb226e821ea3c10c52d768ffab7952204b0f816 (diff)
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Fix flash driver for TRAB board (must use Unlock Bypass Reset command
to exit Unlock Bypass Mode); adjust timings for flash, SRAM and CPLD
Diffstat (limited to 'board/trab/flash.c')
-rw-r--r--board/trab/flash.c26
1 files changed, 19 insertions, 7 deletions
diff --git a/board/trab/flash.c b/board/trab/flash.c
index aba0631..764c57b 100644
--- a/board/trab/flash.c
+++ b/board/trab/flash.c
@@ -39,7 +39,10 @@ flash_info_t flash_info[CFG_MAX_FLASH_BANKS];
#define CMD_PROGRAM 0x00A000A0
#define CMD_UNLOCK_BYPASS 0x00200020
#define CMD_READ_MANF_ID 0x00900090
+#define CMD_UNLOCK_BYPASS_RES1 0x00900090
+#define CMD_UNLOCK_BYPASS_RES2 0x00000000
+#define MEM_FLASH_ADDR (*(volatile u32 *)CFG_FLASH_BASE)
#define MEM_FLASH_ADDR1 (*(volatile u32 *)(CFG_FLASH_BASE + (0x00000555 << 2)))
#define MEM_FLASH_ADDR2 (*(volatile u32 *)(CFG_FLASH_BASE + (0x000002AA << 2)))
@@ -331,9 +334,6 @@ volatile static int write_word (flash_info_t * info, ulong dest,
#endif
iflag = disable_interrupts ();
- MEM_FLASH_ADDR1 = CMD_UNLOCK1;
- MEM_FLASH_ADDR2 = CMD_UNLOCK2;
- MEM_FLASH_ADDR1 = CMD_UNLOCK_BYPASS;
*addr = CMD_PROGRAM;
*addr = data;
@@ -402,6 +402,10 @@ int write_buff (flash_info_t * info, uchar * src, ulong addr, ulong cnt)
int l;
int i, rc;
+ MEM_FLASH_ADDR1 = CMD_UNLOCK1;
+ MEM_FLASH_ADDR2 = CMD_UNLOCK2;
+ MEM_FLASH_ADDR1 = CMD_UNLOCK_BYPASS;
+
wp = (addr & ~3); /* get lower word aligned address */
/*
@@ -422,7 +426,7 @@ int write_buff (flash_info_t * info, uchar * src, ulong addr, ulong cnt)
}
if ((rc = write_word (info, wp, data)) != 0) {
- return (rc);
+ goto Done;
}
wp += 4;
}
@@ -441,7 +445,7 @@ int write_buff (flash_info_t * info, uchar * src, ulong addr, ulong cnt)
}
if ((rc = write_word (info, wp, data)) != 0) {
- return (rc);
+ goto Done;
}
src += 4;
wp += 4;
@@ -449,7 +453,8 @@ int write_buff (flash_info_t * info, uchar * src, ulong addr, ulong cnt)
}
if (cnt == 0) {
- return ERR_OK;
+ rc = ERR_OK;
+ goto Done;
}
/*
@@ -464,7 +469,14 @@ int write_buff (flash_info_t * info, uchar * src, ulong addr, ulong cnt)
data = (data >> 8) | (*(uchar *) cp << 24);
}
- return write_word (info, wp, data);
+ rc = write_word (info, wp, data);
+
+ Done:
+
+ MEM_FLASH_ADDR = CMD_UNLOCK_BYPASS_RES1;
+ MEM_FLASH_ADDR = CMD_UNLOCK_BYPASS_RES2;
+
+ return (rc);
}
/*-----------------------------------------------------------------------