* Afzal Mohammed <afzal@xxxxxx> [120511 08:48]:
> Provide helper function for updating NAND register details for
> the necessary chip select. NAND drivers platform data can be
> updated with this information so that NAND driver can handle
> GPMC NAND operations by itself.
Hmm this seems that it might be a more future proof path.
Tony
> Signed-off-by: Afzal Mohammed <afzal@xxxxxx>
> ---
> arch/arm/mach-omap2/gpmc.c | 21 +++++++++++++++++++++
> arch/arm/plat-omap/include/plat/gpmc.h | 18 ++++++++++++++++++
> 2 files changed, 39 insertions(+)
>
> diff --git a/arch/arm/mach-omap2/gpmc.c b/arch/arm/mach-omap2/gpmc.c
> index 46b09da..a409a3e 100644
> --- a/arch/arm/mach-omap2/gpmc.c
> +++ b/arch/arm/mach-omap2/gpmc.c
> @@ -49,6 +49,7 @@
> #define GPMC_ECC_CONTROL 0x1f8
> #define GPMC_ECC_SIZE_CONFIG 0x1fc
> #define GPMC_ECC1_RESULT 0x200
> +#define GPMC_ECC_BCH_RESULT_0 0x240
>
> /* GPMC ECC control settings */
> #define GPMC_ECC_CTRL_ECCCLEAR 0x100
> @@ -681,6 +682,26 @@ int gpmc_prefetch_reset(int cs)
> }
> EXPORT_SYMBOL(gpmc_prefetch_reset);
>
> +void gpmc_update_nand_reg(struct gpmc_nand_regs *reg, int cs)
> +{
> + reg->gpmc_status = gpmc_base + GPMC_STATUS;
> + reg->gpmc_nand_command = gpmc_base + GPMC_CS0_OFFSET +
> + GPMC_CS_NAND_COMMAND + GPMC_CS_SIZE * cs;
> + reg->gpmc_nand_address = gpmc_base + GPMC_CS0_OFFSET +
> + GPMC_CS_NAND_ADDRESS + GPMC_CS_SIZE * cs;
> + reg->gpmc_nand_data = gpmc_base + GPMC_CS0_OFFSET +
> + GPMC_CS_NAND_DATA + GPMC_CS_SIZE * cs;
> + reg->gpmc_prefetch_config1 = gpmc_base + GPMC_PREFETCH_CONFIG1;
> + reg->gpmc_prefetch_config2 = gpmc_base + GPMC_PREFETCH_CONFIG2;
> + reg->gpmc_prefetch_control = gpmc_base + GPMC_PREFETCH_CONTROL;
> + reg->gpmc_prefetch_status = gpmc_base + GPMC_PREFETCH_STATUS;
> + reg->gpmc_ecc_config = gpmc_base + GPMC_ECC_CONFIG;
> + reg->gpmc_ecc_control = gpmc_base + GPMC_ECC_CONTROL;
> + reg->gpmc_ecc_size_config = gpmc_base + GPMC_ECC_SIZE_CONFIG;
> + reg->gpmc_ecc1_result = gpmc_base + GPMC_ECC1_RESULT;
> + reg->gpmc_bch_result0 = gpmc_base + GPMC_ECC_BCH_RESULT_0;
> +}
> +
> static void __init gpmc_mem_init(void)
> {
> int cs;
> diff --git a/arch/arm/plat-omap/include/plat/gpmc.h b/arch/arm/plat-omap/include/plat/gpmc.h
> index 1527929..6a8078e 100644
> --- a/arch/arm/plat-omap/include/plat/gpmc.h
> +++ b/arch/arm/plat-omap/include/plat/gpmc.h
> @@ -131,6 +131,24 @@ struct gpmc_timings {
> u16 wr_data_mux_bus; /* WRDATAONADMUXBUS */
> };
>
> +struct gpmc_nand_regs {
> + void __iomem *gpmc_status;
> + void __iomem *gpmc_nand_command;
> + void __iomem *gpmc_nand_address;
> + void __iomem *gpmc_nand_data;
> + void __iomem *gpmc_prefetch_config1;
> + void __iomem *gpmc_prefetch_config2;
> + void __iomem *gpmc_prefetch_control;
> + void __iomem *gpmc_prefetch_status;
> + void __iomem *gpmc_ecc_config;
> + void __iomem *gpmc_ecc_control;
> + void __iomem *gpmc_ecc_size_config;
> + void __iomem *gpmc_ecc1_result;
> + void __iomem *gpmc_bch_result0;
> +};
> +
> +extern void gpmc_update_nand_reg(struct gpmc_nand_regs *reg, int cs);
> +
> extern unsigned int gpmc_ns_to_ticks(unsigned int time_ns);
> extern unsigned int gpmc_ps_to_ticks(unsigned int time_ps);
> extern unsigned int gpmc_ticks_to_ns(unsigned int ticks);
> --
> 1.7.10
>
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