8 Aug
2006
8 Aug
'06
1 p.m.
Sam Song writes:
Zang> Where is the patch? I do not object. Our final goal is to Zang> enable the general flash driver work on the board.
Sam> Sorry, I misused the word patch:-). The "patch" is Yuli's Sam> cfi_flash.c in his attached file. See your mail archive. It Sam> would be there. I tested that it was OK but still need your Sam> confirmation, I am afraid.
OK, the patch is attached. As we know, it works on big-endian systems. On little-endian ones, it should change nothing.
--
========================================================================
Yuli Barcohen | Phone +972-9-765-1788 | Software Project Leader
yuli@arabellasw.com | Fax +972-9-765-7494 | Arabella Software, Israel
========================================================================
--- ../GIT/drivers/cfi_flash.c 2006-06-06 09:48:51.000000000 +0300
+++ drivers/cfi_flash.c 2006-07-26 17:16:37.000000000 +0300
@@ -2,9 +2,12 @@
* (C) Copyright 2002-2004
* Brad Kemp, Seranoa Networks, Brad.Kemp@seranoa.com
*
- * Copyright (C) 2003 Arabella Software Ltd.
+ * Copyright (C) 2003, 2006 Arabella Software Ltd.
* Yuli Barcohen yuli@arabellasw.com
* Modified to work with AMD flashes
+ * Added support for byte lanes swap
+ * Added support for 32-bit chips consisting of two 16-bit devices
+ * (for example, S70GL256M00)
*
* Copyright (C) 2004
* Ed Okerson
@@ -45,10 +48,13 @@
/* #define DEBUG */
#include <common.h>
+
+#ifdef CFG_FLASH_CFI_DRIVER
+
+#include <watchdog.h>
#include <asm/processor.h>
#include <asm/byteorder.h>
#include <environment.h>
-#ifdef CFG_FLASH_CFI_DRIVER
/*
* This file implements a Common Flash Interface (CFI) driver for U-Boot.
@@ -71,6 +77,10 @@
* Verify erase and program timeouts.
*/
+#if defined(__LITTLE_ENDIAN) && !defined(CFG_FLASH_CFI_SWAP)
+#define CFG_FLASH_CFI_SWAP
+#endif
+
#ifndef CFG_FLASH_BANKS_LIST
#define CFG_FLASH_BANKS_LIST { CFG_FLASH_BASE }
#endif
@@ -268,7 +278,7 @@ inline uchar flash_read_uchar (flash_inf
uchar *cp;
cp = flash_make_addr (info, 0, offset);
-#if defined(__LITTLE_ENDIAN)
+#if defined(CFG_FLASH_CFI_SWAP)
return (cp[0]);
#else
return (cp[info->portwidth - 1]);
@@ -295,7 +305,7 @@ ushort flash_read_ushort (flash_info_t *
debug ("addr[%x] = 0x%x\n", x, addr[x]);
}
#endif
-#if defined(__LITTLE_ENDIAN)
+#if defined(CFG_FLASH_CFI_SWAP)
retval = ((addr[(info->portwidth)] << 8) | addr[0]);
#else
retval = ((addr[(2 * info->portwidth) - 1] << 8) |
@@ -327,7 +337,7 @@ ulong flash_read_long (flash_info_t * in
debug ("addr[%x] = 0x%x\n", x, addr[x]);
}
#endif
-#if defined(__LITTLE_ENDIAN)
+#if defined(CFG_FLASH_CFI_SWAP)
retval = (addr[0] << 16) | (addr[(info->portwidth)] << 24) |
(addr[(2 * info->portwidth)]) | (addr[(3 * info->portwidth)] << 8);
#else
@@ -892,12 +902,22 @@ static void flash_make_cmd (flash_info_t
int i;
uchar *cp = (uchar *) cmdbuf;
-#if defined(__LITTLE_ENDIAN)
+#if defined(CFG_FLASH_CFI_SWAP)
for (i = info->portwidth; i > 0; i--)
#else
for (i = 1; i <= info->portwidth; i++)
#endif
*cp++ = (i & (info->chipwidth - 1)) ? '\0' : cmd;
+#ifdef CFG_FLASH_CFI_2x16
+ if ((info->portwidth == FLASH_CFI_32BIT) && (info->chipwidth == FLASH_CFI_BY16))
+ {
+ uchar tmp;
+ cp = (uchar *) cmdbuf;
+ tmp = cp[1];
+ cp[1] = cp[2];
+ cp[2] = tmp;
+ }
+#endif /* CFG_FLASH_CFI_2x16 */
}
/*