Fix some bugs in TRAB board flash driver.

- increase CFG_FLASH_ERASE_TOUT from 2 to 15 seconds
- use CFG_FLASH_WRITE_TOUT for programming instead of CFG_FLASH_ERASE_TOUT
- remove "Unlock Bypass" mode, because macronix flashes do not support
  this mode officially
- fix flash reset command from 0x00FF to 0x00F0. 0x00FF is only specified
  for Intel compatible flashes, not for AMD compatible.
Patch by Martin Krause, 15 Feb 2006

CHANGELOG

@@ -2,6 +2,15 @@
 Changes since U-Boot 1.1.4:
 ======================================================================
 
+* Fix some bugs in TRAB board flash driver.
+  - increase CFG_FLASH_ERASE_TOUT from 2 to 15 seconds
+  - use CFG_FLASH_WRITE_TOUT for programming instead of CFG_FLASH_ERASE_TOUT
+  - remove "Unlock Bypass" mode, because macronix flashes do not support
+    this mode officially
+  - fix flash reset command from 0x00FF to 0x00F0. 0x00FF is only specified
+    for Intel compatible flashes, not for AMD compatible.
+  Patch by Martin Krause, 15 Feb 2006
+
 * Add additional error messages to flash driver on TRAB board
   (for erase errors and timeout errors)
   Patch by Martin Krause, 14 Feb 2006

board/trab/flash.c

@@ -342,7 +342,9 @@ static int write_word (flash_info_t * info, ulong dest, ulong data)
 #endif
 	iflag = disable_interrupts ();
 
-	*addr = CMD_PROGRAM;
+	MEM_FLASH_ADDR1 = CMD_UNLOCK1;
+	MEM_FLASH_ADDR2 = CMD_UNLOCK2;
+	MEM_FLASH_ADDR1 = CMD_PROGRAM;
 	*addr = data;
 
 	/* arm simple, non interrupt dependent timer */
@@ -354,7 +356,7 @@ static int write_word (flash_info_t * info, ulong dest, ulong data)
 		result = *addr;
 
 		/* check timeout */
-		if (get_timer_masked () > CFG_FLASH_ERASE_TOUT) {
+		if (get_timer_masked () > CFG_FLASH_WRITE_TOUT) {
 			chip1 = ERR | TMO;
 			break;
 		}
@@ -415,10 +417,6 @@ 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 */
 
 	/*
@@ -486,9 +484,6 @@ int write_buff (flash_info_t * info, uchar * src, ulong addr, ulong cnt)
 
 	Done:
 
-	MEM_FLASH_ADDR = CMD_UNLOCK_BYPASS_RES1;
-	MEM_FLASH_ADDR = CMD_UNLOCK_BYPASS_RES2;
-
 	return (rc);
 }
 
@@ -522,7 +517,7 @@ static ulong flash_get_size (vu_long *addr, flash_info_t *info)
 		info->flash_id = FLASH_UNKNOWN;
 		info->sector_count = 0;
 		info->size = 0;
-		addr[0] = 0x00FF00FF;		/* restore read mode */
+		addr[0] = CMD_READ_ARRAY;	/* restore read mode */
 		debug ("## flash_init: unknown manufacturer\n");
 		return (0);			/* no or unknown flash	*/
 	}
@@ -537,7 +532,7 @@ static ulong flash_get_size (vu_long *addr, flash_info_t *info)
 		info->sector_count = 71;
 		info->size = 0x00800000;
 
-		addr[0] = 0x00FF00FF;		/* restore read mode */
+		addr[0] = CMD_READ_ARRAY;	/* restore read mode */
 		break;				/* =>  8 MB		*/
 
 	case AMD_ID_LV640U:
@@ -545,7 +540,7 @@ static ulong flash_get_size (vu_long *addr, flash_info_t *info)
 		info->sector_count = 128;
 		info->size = 0x01000000;
 
-		addr[0] = 0x00F000F0;		/* restore read mode */
+		addr[0] = CMD_READ_ARRAY;	/* restore read mode */
 		break;				/* => 16 MB		*/
 
 	case MX_ID_LV320B:
@@ -553,13 +548,13 @@ static ulong flash_get_size (vu_long *addr, flash_info_t *info)
 		info->sector_count = 71;
 		info->size = 0x00800000;
 
-		addr[0] = 0x00FF00FF;		/* restore read mode */
+		addr[0] = CMD_READ_ARRAY;	/* restore read mode */
 		break;				/* =>  8 MB		*/
 
 	default:
 		debug ("## flash_init: unknown flash chip\n");
 		info->flash_id = FLASH_UNKNOWN;
-		addr[0] = 0x00FF00FF;		/* restore read mode */
+		addr[0] = CMD_READ_ARRAY;	/* restore read mode */
 		return (0);			/* => no or unknown flash */
 
 	}

include/configs/trab.h

@@ -402,7 +402,7 @@
 #endif
 
 /* timeout values are in ticks */
-#define CFG_FLASH_ERASE_TOUT	(2*CFG_HZ) /* Timeout for Flash Erase */
+#define CFG_FLASH_ERASE_TOUT	(15*CFG_HZ) /* Timeout for Flash Erase */
 #define CFG_FLASH_WRITE_TOUT	(2*CFG_HZ) /* Timeout for Flash Write */
 
 #define	CFG_ENV_IS_IN_FLASH	1