[U-Boot] [PATCH] OMAP3EVM: Added NAND support

Nishanth Menon
2009-11-18T18:07:58Z

On Wed, Nov 18, 2009 at 12:58 AM, <hvaibhav@ti.com> wrote:
> From: Vaibhav Hiremath <hvaibhav@ti.com>
>
> User can now choose between NAND and ONENAND support in omap3_evm.h
>
> Signed-off-by: Vaibhav Hiremath <hvaibhav@ti.com>
> ---
> ?include/configs/omap3_evm.h | ? 27 ++++++++++++++++++++++++++-
> ?1 files changed, 26 insertions(+), 1 deletions(-)
>
> diff --git a/include/configs/omap3_evm.h b/include/configs/omap3_evm.h
> index a5514ae..3434306 100644
> --- a/include/configs/omap3_evm.h
> +++ b/include/configs/omap3_evm.h
> @@ -110,7 +110,8 @@
>
> ?#define CONFIG_CMD_I2C ? ? ? ? /* I2C serial bus support ? ? ? */
> ?#define CONFIG_CMD_MMC ? ? ? ? /* MMC support ? ? ? ? ? ? ? ? ?*/
> -#define CONFIG_CMD_ONENAND ? ? /* ONENAND support ? ? ? ? ? ? ?*/
> +/*#define CONFIG_CMD_ONENAND*/ /* ONENAND support ? ? ? ? ? ? ?*/
do you wish to use #undef instead of commented code? also adding a
comment on top saying this is an option might help..

This patch opens up a chain for me: how do we have the same build of
u-boot boot accross nand, onenand, mmc type devices?
current u-boot looks constrainted in that respect.

> +#define CONFIG_CMD_NAND ? ? ? ? ? ? ? ?/* NAND support ? ? ? ? ? ? ? ? */
> ?#define CONFIG_CMD_DHCP
> ?#define CONFIG_CMD_PING
>
> @@ -141,6 +142,7 @@
> ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?/* to access */
> ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?/* nand at CS0 */
>
> +
> ?#define CONFIG_SYS_MAX_NAND_DEVICE ? ? 1 ? ? ? ? ? ? ? /* Max number of */
> ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?/* NAND devices */
> ?#define CONFIG_SYS_64BIT_VSPRINTF ? ? ? ? ? ? ?/* needed for nand_util.c */
> @@ -268,7 +270,13 @@
> ?#define CONFIG_SYS_MONITOR_BASE ? ? ? ? ? ? ? ?CONFIG_SYS_FLASH_BASE
> ?#define CONFIG_SYS_ONENAND_BASE ? ? ? ? ? ? ? ?ONENAND_MAP
>
> +#if defined(CONFIG_CMD_NAND)
> +#define CONFIG_NAND_OMAP_GPMC
> +#define GPMC_NAND_ECC_LP_x16_LAYOUT ? ?1
> +#define CONFIG_ENV_IS_IN_NAND ? ? ? ? ?1
> +#elif defined(CONFIG_CMD_ONENAND)
> ?#define CONFIG_ENV_IS_IN_ONENAND ? ? ? 1
> +#endif

what if a user decided to enable NAND and ONENAND?

> ?#define ONENAND_ENV_OFFSET ? ? ? ? ? ? 0x260000 /* environment starts here */
> ?#define SMNAND_ENV_OFFSET ? ? ? ? ? ? ?0x260000 /* environment starts here */
>
> @@ -300,6 +308,23 @@ extern unsigned int boot_flash_sec;
> ?extern unsigned int boot_flash_type;
> ?#endif
>
> +
> +#define WRITE_NAND_COMMAND(d, adr)\
> + ? ? ? ? ? ? ? ? ? ? ? writel(d, &nand_cs_base->nand_cmd)
writel? i thought u had 16 bit nand device.

> +#define WRITE_NAND_ADDRESS(d, adr)\
> + ? ? ? ? ? ? ? ? ? ? ? writel(d, &nand_cs_base->nand_adr)
> +#define WRITE_NAND(d, adr) writew(d, &nand_cs_base->nand_dat)
> +#define READ_NAND(adr) readl(&nand_cs_base->nand_dat)
readl?? should'nt you be using readw?

Why these functions? does'nt mtd layer handle this? look at beagle ->
it does not use that..

> +
> +/* Other NAND Access APIs */
> +#define NAND_WP_OFF() do {readl(&gpmc_cfg_base->config) |= GPMC_CONFIG_WP; } \
> + ? ? ? ? ? ? ? ? ? ? ? while (0)
> +#define NAND_WP_ON() do {readl(&gpmc_cfg_base->config) &= ~GPMC_CONFIG_WP; } \
> + ? ? ? ? ? ? ? ? ? ? ? while (0)
> +#define NAND_DISABLE_CE(nand)
> +#define NAND_ENABLE_CE(nand)
> +#define NAND_WAIT_READY(nand) ?udelay(10)
> +
are these really needed?

> ?/*----------------------------------------------------------------------------
> ?* SMSC9115 Ethernet from SMSC9118 family
> ?*----------------------------------------------------------------------------
> --
> 1.6.2.4
>
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