Stefan Roese <sr <at> denx.de> writes:
Hi Prakash,
On Friday 15 January 2010 14:23:35 prakash bedge wrote:
In October 09 month, I had asked whether U-boot supports M29W128GH, a CFI compilant chip and I got a yes reply. Please refer below URL for reference.
http://www.mail-archive.com/u-boot <at> lists.denx.de/msg24531.html.
Link not found. Please correct.
So I have used Uboot for my PPC440 based board.
When I flashed U-boot on flash and then run the Uboot in DDR then U-boot running on DDR fails to detect CFI chip M29W128GH (16M x 8 mode).
flash_detect_cfi function gives error that flash not found. I have added debug statements for temporary debug purpose. Please see the below error I am getting.
The CFI query address looks different in below code and not as per ST make M29W128GH specs. PCIMW.
What's the difference then? Please give an example.
I suggest you take a look at this prelimiary patch:
http://lists.denx.de/pipermail/u-boot/2009-December/065562.html
Please let me know if this helps or not.
Cheers, Stefan
-- DENX Software Engineering GmbH, MD: Wolfgang Denk & Detlev Zundel HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany Phone: (+49)-8142-66989-0 Fax: (+49)-8142-66989-80 Email: office <at> denx.de
Hello everyone, Im still facing this issue with i tried to detect the M29W256G . I applied the patch above and the code keeps on hanging in the first reset commmad.
void __flash_cmd_reset(flash_info_t *info) { /* * We do not yet know what kind of commandset to use, so we issue * the reset command in both Intel and AMD variants, in the hope * that AMD flash roms ignore the Intel command. */ flash_write_cmd(info, 0, 0, AMD_CMD_RESET); <<<<<----HERE it stops
if(info->cfi_fixup & CFI_NUMONYX_FIXUP) return;
udelay(1); flash_write_cmd(info, 0, 0, FLASH_CMD_RESET); } void flash_cmd_reset(flash_info_t *info) __attribute__((weak,alias("__flash_cmd_reset")));
static int __flash_detect_cfi (flash_info_t * info, struct cfi_qry *qry) { int cfi_offset;
#define reset() writew(0x00F0, CONFIG_SYS_FLASH_BASE) #define unlock() writel(0x00AA, CONFIG_SYS_FLASH_BASE+(0x555<<1)); writel(0x0055, CONFIG_SYS_FLASH_BASE+(0x2AA<<1)) /* Issue FLASH reset command */ info->cfi_fixup = 0;
#ifdef CONFIG_FLASH_NUMONYX_FIXUP info->cfi_fixup = CFI_NUMONYX_FIXUP; #endif flash_cmd_reset(info);
Boot Device: SD I2C: ready DRAM: 2 GB fwc addr 08000000 cmd f0 f0 8bit x 8 bit
if you please could provide any hint about who to overcome this issue, I would apprecieate it so baddly.
Regards, Francisco