[U-Boot] [PATCH 10/10 V6] DWMMC: SMDK5420: Disable SMU for eMMC

[Jaehoon Chung]

Looks good to me.

Acked-by: Jaehoon Chung <jh80.chung at samsung.com>

On 10/29/2013 04:23 PM, Rajeshwari S Shinde wrote:
> SMDK5420 has a new Security Management Unit added
> for dwmmc driver, hence, configuring the control
> registers to support booting via eMMC.
> 
> Signed-off-by: Alim Akhtar <alim.akhtar at samsung.com>
> Signed-off-by: Rajeshwari Shinde <rajeshwari.s at samsung.com>
> Acked-by: Simon Glass <sjg at chromium.org>
> ---
> Changes in V3:
> 	- New patch.
> Changes in V4:
> 	Added flag to dissble SMU
> Changes in V5:
> 	- None
> Changes in V6:
> 	- Moved the SMU definitions to arch/arm dwmmc.h
>  arch/arm/include/asm/arch-exynos/dwmmc.h | 13 +++++++++++++
>  drivers/mmc/dw_mmc.c                     | 11 +++++++++++
>  drivers/mmc/exynos_dw_mmc.c              |  3 +++
>  include/dwmmc.h                          |  3 +++
>  4 files changed, 30 insertions(+)
> 
> diff --git a/arch/arm/include/asm/arch-exynos/dwmmc.h b/arch/arm/include/asm/arch-exynos/dwmmc.h
> index b9eca76..d1c5d4f 100644
> --- a/arch/arm/include/asm/arch-exynos/dwmmc.h
> +++ b/arch/arm/include/asm/arch-exynos/dwmmc.h
> @@ -14,6 +14,19 @@
>  #define DWMCI_SET_DRV_CLK(x)	((x) << 16)
>  #define DWMCI_SET_DIV_RATIO(x)	((x) << 24)
>  
> +#define EMMCP_MPSBEGIN0		0x1200
> +#define EMMCP_SEND0		0x1204
> +#define EMMCP_CTRL0		0x120C
> +
> +#define MPSCTRL_SECURE_READ_BIT		(0x1<<7)
> +#define MPSCTRL_SECURE_WRITE_BIT	(0x1<<6)
> +#define MPSCTRL_NON_SECURE_READ_BIT	(0x1<<5)
> +#define MPSCTRL_NON_SECURE_WRITE_BIT	(0x1<<4)
> +#define MPSCTRL_USE_FUSE_KEY		(0x1<<3)
> +#define MPSCTRL_ECB_MODE		(0x1<<2)
> +#define MPSCTRL_ENCRYPTION		(0x1<<1)
> +#define MPSCTRL_VALID			(0x1<<0)
> +
>  #ifdef CONFIG_OF_CONTROL
>  int exynos_dwmmc_init(const void *blob);
>  #endif
> diff --git a/drivers/mmc/dw_mmc.c b/drivers/mmc/dw_mmc.c
> index 9a803a0..a3506d4 100644
> --- a/drivers/mmc/dw_mmc.c
> +++ b/drivers/mmc/dw_mmc.c
> @@ -11,6 +11,7 @@
>  #include <mmc.h>
>  #include <dwmmc.h>
>  #include <asm-generic/errno.h>
> +#include <asm/arch/dwmmc.h>
>  
>  #define PAGE_SIZE 4096
>  
> @@ -301,6 +302,16 @@ static int dwmci_init(struct mmc *mmc)
>  	struct dwmci_host *host = (struct dwmci_host *)mmc->priv;
>  	u32 fifo_size;
>  
> +	if (host->quirks & DWMCI_QUIRK_DISABLE_SMU) {
> +		dwmci_writel(host, EMMCP_MPSBEGIN0, 0);
> +		dwmci_writel(host, EMMCP_SEND0, 0);
> +		dwmci_writel(host, EMMCP_CTRL0,
> +			     MPSCTRL_SECURE_READ_BIT |
> +			     MPSCTRL_SECURE_WRITE_BIT |
> +			     MPSCTRL_NON_SECURE_READ_BIT |
> +			     MPSCTRL_NON_SECURE_WRITE_BIT | MPSCTRL_VALID);
> +	}
> +
>  	dwmci_writel(host, DWMCI_PWREN, 1);
>  
>  	if (!dwmci_wait_reset(host, DWMCI_RESET_ALL)) {
> diff --git a/drivers/mmc/exynos_dw_mmc.c b/drivers/mmc/exynos_dw_mmc.c
> index 4ef9fec..f7439a0 100644
> --- a/drivers/mmc/exynos_dw_mmc.c
> +++ b/drivers/mmc/exynos_dw_mmc.c
> @@ -62,6 +62,9 @@ int exynos_dwmci_add_port(int index, u32 regbase, int bus_width, u32 clksel)
>  	host->name = "EXYNOS DWMMC";
>  	host->ioaddr = (void *)regbase;
>  	host->buswidth = bus_width;
> +#ifdef CONFIG_EXYNOS5420
> +	host->quirks = DWMCI_QUIRK_DISABLE_SMU;
> +#endif
>  
>  	if (clksel) {
>  		host->clksel_val = clksel;
> diff --git a/include/dwmmc.h b/include/dwmmc.h
> index 08ced0b..6263140 100644
> --- a/include/dwmmc.h
> +++ b/include/dwmmc.h
> @@ -123,6 +123,9 @@
>  #define DWMCI_BMOD_IDMAC_FB	(1 << 1)
>  #define DWMCI_BMOD_IDMAC_EN	(1 << 7)
>  
> +/* quirks */
> +#define DWMCI_QUIRK_DISABLE_SMU		(1 << 0)
> +
>  struct dwmci_host {
>  	char *name;
>  	void *ioaddr;
>