[U-Boot] [PATCH 1/2] rockchip: rk3188: add support for usb-uart functionality

[Heiko Stuebner <heiko@sntech.de>]

Hi Philipp,

Am Montag, 8. Oktober 2018, 13:01:56 CET schrieb Heiko Stuebner:
> Rockchip socs can route the debug uart pins through the d+ and d- pins
> of one specific usbphy per soc. Add a config option and implement the
> setting on the rk3188.
> 
> Signed-off-by: Heiko Stuebner <heiko@sntech.de>

any thoughts on this and patch2?

Thank
Heiko

> ---
>  .../include/asm/arch-rockchip/grf_rk3188.h    | 42 +++++++++++++++++++
>  arch/arm/mach-rockchip/Kconfig                |  8 ++++
>  arch/arm/mach-rockchip/rk3188-board-spl.c     | 27 ++++++++++--
>  3 files changed, 73 insertions(+), 4 deletions(-)
> 
> diff --git a/arch/arm/include/asm/arch-rockchip/grf_rk3188.h b/arch/arm/include/asm/arch-rockchip/grf_rk3188.h
> index 28a159c5b7..d05197670d 100644
> --- a/arch/arm/include/asm/arch-rockchip/grf_rk3188.h
> +++ b/arch/arm/include/asm/arch-rockchip/grf_rk3188.h
> @@ -205,4 +205,46 @@ enum {
>  	ATO_AE_SHIFT		= 0,
>  	ATO_AE_MASK		= 1,
>  };
> +
> +/* GRF_UOC_CON0 */
> +enum {
> +	SIDDQ_SHIFT		= 13,
> +	SIDDQ_MASK		= 1 << SIDDQ_SHIFT,
> +
> +	BYPASSSEL_SHIFT		= 9,
> +	BYPASSSEL_MASK		= 1 << BYPASSSEL_SHIFT,
> +
> +	BYPASSDMEN_SHIFT	= 8,
> +	BYPASSDMEN_MASK		= 1 << BYPASSDMEN_SHIFT,
> +
> +	UOC_DISABLE_SHIFT	= 4,
> +	UOC_DISABLE_MASK	= 1 << UOC_DISABLE_SHIFT,
> +
> +	COMMON_ON_N_SHIFT	= 0,
> +	COMMON_ON_N_MASK	= 1 << COMMON_ON_N_SHIFT,
> +};
> +
> +/* GRF_UOC_CON2 */
> +enum {
> +	SOFT_CON_SEL_SHIFT	= 2,
> +	SOFT_CON_SEL_MASK	= 1 << SOFT_CON_SEL_SHIFT,
> +};
> +
> +/* GRF_UOC0_CON3 */
> +enum {
> +	TERMSEL_FULLSPEED_SHIFT	= 5,
> +	TERMSEL_FULLSPEED_MASK	= 1 << TERMSEL_FULLSPEED_SHIFT,
> +
> +	XCVRSELECT_SHIFT	= 3,
> +	XCVRSELECT_FSTRANSC	= 1,
> +	XCVRSELECT_MASK		= 3 << XCVRSELECT_SHIFT,
> +
> +	OPMODE_SHIFT		= 1,
> +	OPMODE_NODRIVING	= 1,
> +	OPMODE_MASK		= 3 << OPMODE_SHIFT,
> +
> +	SUSPENDN_SHIFT		= 0,
> +	SUSPENDN_MASK		= 1 << SUSPENDN_SHIFT,
> +};
> +
>  #endif
> diff --git a/arch/arm/mach-rockchip/Kconfig b/arch/arm/mach-rockchip/Kconfig
> index 145d96b1f0..0e15f7b859 100644
> --- a/arch/arm/mach-rockchip/Kconfig
> +++ b/arch/arm/mach-rockchip/Kconfig
> @@ -156,6 +156,14 @@ config ROCKCHIP_RV1108
>  	  The Rockchip RV1108 is a ARM-based SoC with a single-core Cortex-A7
>  	  and a DSP.
>  
> +config ROCKCHIP_USB_UART
> +	bool "Route uart output to usb pins"
> +	help
> +	  Rockchip SoCs have the ability to route the signals of the debug
> +	  uart through the d+ and d- pins of a specific usb phy to enable
> +	  some form of closed-case debugging. With this option supported
> +	  SoCs will enable this routing as a debug measure.
> +
>  config SPL_ROCKCHIP_BACK_TO_BROM
>  	bool "SPL returns to bootrom"
>  	default y if ROCKCHIP_RK3036
> diff --git a/arch/arm/mach-rockchip/rk3188-board-spl.c b/arch/arm/mach-rockchip/rk3188-board-spl.c
> index 98ca971b88..4a810ef696 100644
> --- a/arch/arm/mach-rockchip/rk3188-board-spl.c
> +++ b/arch/arm/mach-rockchip/rk3188-board-spl.c
> @@ -16,6 +16,7 @@
>  #include <asm/io.h>
>  #include <asm/arch/bootrom.h>
>  #include <asm/arch/clock.h>
> +#include <asm/arch/grf_rk3188.h>
>  #include <asm/arch/hardware.h>
>  #include <asm/arch/periph.h>
>  #include <asm/arch/pmu_rk3188.h>
> @@ -92,18 +93,17 @@ static int setup_arm_clock(void)
>  	return ret;
>  }
>  
> +#define GRF_BASE	0x20008000
> +
>  void board_init_f(ulong dummy)
>  {
> +	struct rk3188_grf * const grf = (void *)GRF_BASE;
>  	struct udevice *pinctrl, *dev;
>  	int ret;
>  
>  	/* Example code showing how to enable the debug UART on RK3188 */
>  #ifdef EARLY_UART
> -#include <asm/arch/grf_rk3188.h>
>  	/* Enable early UART on the RK3188 */
> -#define GRF_BASE	0x20008000
> -	struct rk3188_grf * const grf = (void *)GRF_BASE;
> -
>  	rk_clrsetreg(&grf->gpio1b_iomux,
>  		     GPIO1B1_MASK << GPIO1B1_SHIFT |
>  		     GPIO1B0_MASK << GPIO1B0_SHIFT,
> @@ -124,6 +124,25 @@ void board_init_f(ulong dummy)
>  	printch('\n');
>  #endif
>  
> +#ifdef CONFIG_ROCKCHIP_USB_UART
> +	rk_clrsetreg(&grf->uoc0_con[0],
> +		     SIDDQ_MASK | UOC_DISABLE_MASK | COMMON_ON_N_MASK,
> +		     1 << SIDDQ_SHIFT | 1 << UOC_DISABLE_SHIFT |
> +		     1 << COMMON_ON_N_SHIFT);
> +	rk_clrsetreg(&grf->uoc0_con[2],
> +		     SOFT_CON_SEL_MASK, 1 << SOFT_CON_SEL_SHIFT);
> +	rk_clrsetreg(&grf->uoc0_con[3],
> +		     OPMODE_MASK | XCVRSELECT_MASK |
> +		     TERMSEL_FULLSPEED_MASK | SUSPENDN_MASK,
> +		     OPMODE_NODRIVING << OPMODE_SHIFT |
> +		     XCVRSELECT_FSTRANSC << XCVRSELECT_SHIFT |
> +		     1 << TERMSEL_FULLSPEED_SHIFT |
> +		     1 << SUSPENDN_SHIFT);
> +	rk_clrsetreg(&grf->uoc0_con[0],
> +		     BYPASSSEL_MASK | BYPASSDMEN_MASK,
> +		     1 << BYPASSSEL_SHIFT | 1 << BYPASSDMEN_SHIFT);
> +#endif
> +
>  	ret = spl_early_init();
>  	if (ret) {
>  		debug("spl_early_init() failed: %d\n", ret);
>