[U-Boot] M29W256GL + WEIM in uboot

[Marek Vasut]

> Marek,
> 
> Could you please go slower on this. Please point me what do I have to
> read because Im not getting the meaning of MMAPED in uboot and how to
> related this to my NOR flash.

Can you please at least obey basic rules of using a mailing list ?

DO NOT TOP-POST
DO NOT DROP IT FROM CC

MMAPed == memory mapped.

M

> 
> Regards,
> Francisco.
> 
> On Mon, Feb 13, 2012 at 2:52 PM, Marek Vasut <marek.vasut at gmail.com> wrote:
> >> Hello, Im new to all of this, but I 've  been reading most of the post
> >> related to the M29w256 numonyx and the u-boot documentation without
> >> any success :(
> >> 
> >> Im booting from MMC card and I want to parallel nor to be probed by
> >> cfi, but I have not succeeded since the uboot code freezes when at the
> >> beginning of the Marekfirst "flash_cmd_write" in cfi_flash.c
> >> 
> >>        /* Issue FLASH reset command */
> >>         flash_cmd_reset(info);
> >> 
> >> The CS0_BASE_ADDR  has an start address matching  #define
> >> WEIM_ARB_BASE_ADDR              0x08000000     , however the range of
> >> the WEIM interface register settings are between 021B_8000 --
> >> 021B_8098.
> >> 
> >> Many board files has the WEIM CS0 as the start of the registers and I
> >> think this is why the NOR configuration is a matter of config settings
> >> like the ones below.
> >> 
> >> #define CONFIG_SYS_FLASH_BASE           CS0_BASE_ADDR
> >> #define CONFIG_SYS_MAX_FLASH_BANKS 1
> >> #define CONFIG_SYS_MAX_FLASH_SECT 256
> >> #define CONFIG_SYS_FLASH_CFI_WIDTH      FLASH_CFI_16BIT
> >> #define CONFIG_SYS_FLASH_CFI_AMD_RESET 1
> >> 
> >> /* Monitor at beginning of flash */
> >> #define CONFIG_SYS_MONITOR_BASE         CONFIG_SYS_FLASH_BASE
> >> #define CONFIG_SYS_MONITOR_LEN          0x40000         /* Reserve
> >> 256KiB */
> >> 
> >> #define CONFIG_ENV_SECT_SIZE   0x20000
> >> #define CONFIG_ENV_SIZE         CONFIG_ENV_SECT_SIZE
> >> #define CONFIG_ENV_ADDR         (CONFIG_SYS_FLASH_BASE + 0x40000)
> >> 
> >> /* Address and size of Redundant Environment Sector     */
> >> #define CONFIG_ENV_OFFSET_REDUND        (CONFIG_ENV_OFFSET +
> >> CONFIG_ENV_SIZE) #define CONFIG_ENV_SIZE_REDUND  CONFIG_ENV_SIZE
> >> 
> >> 
> >> If you could give me some help so that at least I could send write
> >> commands to the chip without hang pls...
> > 
> > You're pointing CFI to configuration registers, you need to point it to
> > where the NOR flash is MMAPed. If it's not MMAPed, this isn't your
> > driver. M