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 --- .../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);