[U-Boot] [PATCH v1 2/2] ti814x_evm: enable support for NAND

[Tom Rini]

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On 09/16/2013 05:51 AM, Gupta, Pekon wrote:
>> On Tue, Aug 06, 2013 at 01:45:08PM +0530, Pekon Gupta wrote:
>>
>>> ti814x_evm has on-board socket for using Micron (MT29Fxx) family of
>>> NAND devices to GPMC interface. This patch
>>> - adds NAND related pin-mux configuration for same
>>> - adds #defines for NAND partitions to TI814x configs
>>> - enables support for NAND in TI814x configs
> [snip]
>>
>>> @@ -186,6 +193,14 @@
>>>  #define CONFIG_SYS_U_BOOT_MAX_SIZE_SECTORS      0x200 /* 256 KB */
>>>  #define CONFIG_SYS_MMC_SD_FAT_BOOT_PARTITION    1
>>>  #define CONFIG_SPL_FAT_LOAD_PAYLOAD_NAME        "u-boot.img"
>>> +
>>> +#ifdef CONFIG_SPL_OS_BOOT
>>> +/* nand */
>>> +#define CONFIG_CMD_SPL_NAND_OFS			0x000000 /*
>> end of u-boot */
>>> +#define CONFIG_SYS_NAND_SPL_KERNEL_OFFS		0x280000
>>> +#define CONFIG_CMD_SPL_WRITE_SIZE		0x1000
>>> +#endif
>>
>> Since you aren't adding the SD/MMC defines as well, nor setting
>> SPL_OS_BOOT, lets drop these.
>>
> Sorry but dint get your feedback.
> Following are used in SPL boot for loading env and kernel in falcon mode.
> Referring: $UBOOT/common/spl/spl_nand.c
> - CONFIG_SYS_NAND_SPL_KERNEL_OFFS
> - CONFIG_CMD_SPL_WRITE_SIZE 
> - CONFIG_CMD_SPL_NAND_OFS
> May be I put them in wrong place in include/configs/ti814x.h but these
> are required for NAND SPL boot. Please confirm ?

They are required for falcon mode yes, but only for falcon mode.  And
you don't set CONFIG_SPL_OS_BOOT to turn it on :)

>>> @@ -242,5 +283,32 @@
>>>  #define CONFIG_PHY_ADDR			1
>>>  #define CONFIG_PHY_ET1011C
>>>  #define CONFIG_PHY_ET1011C_TX_CLK_FIX
>>> +#define CONFIG_NAND
>>> +/* NAND support */
>>> +#ifdef CONFIG_NAND
>>> +#define CONFIG_MTD_NAND_OMAP_BCH
>>> +#define CONFIG_CMD_NAND
>>> +#define CONFIG_CMD_MTDPARTS
>>> +#define MTDIDS_DEFAULT			"nand0=omap2-nand.0"
>>> +#define MTDPARTS_DEFAULT		"mtdparts=omap2-
>> nand.0:128k(SPL)," \
>>> +					"128k(u-boot-spl)," \
>>> +					"2M(u-boot-main)," \
>>> +					"128k(u-boot-env),4M(kernel),-
>> (rootfs)"
>>
>> Lets get the partition tables right, we've still got 4 locations where
>> ROM checks for something, so lets use those for SPL, then U-Boot, then
>> U-Boot Env (redundant as well, please), and a block saved off for device
>> tree/SPL OS "args" support, then kernel, rootfs.
>>
> I think TI814x ROM use different NAND layout than AM33xx devices.
> I used following NAND layout given in link below as reference:
> http://processors.wiki.ti.com/index.php/TI81XX_PSP_UBOOT_User_Guide#EVM_Switch_Settings
> These devices belong to omap3 family, but now are merged with am33xx.

Yeah.  OMAP3 and AM33xx (and am43xx) share the same redundancy
locations.  The PSP layout here is sub-optimal is all.

- -- 
Tom
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