From 5b5ca4c0d467d06509aba2838e11ab6909439704 Mon Sep 17 00:00:00 2001 From: Heiko Stuebner Date: Mon, 8 Oct 2018 13:01:56 +0200 Subject: rockchip: rk3188: add support for usb-uart functionality 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 Reviewed-by: Philipp Tomsich [Fixed up to mark grf as maybe unused:] Signed-off-by: Philipp Tomsich --- arch/arm/mach-rockchip/Kconfig | 8 ++++++++ arch/arm/mach-rockchip/rk3188-board-spl.c | 27 +++++++++++++++++++++++---- 2 files changed, 31 insertions(+), 4 deletions(-) (limited to 'arch/arm/mach-rockchip') 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..5adbca1e8d 100644 --- a/arch/arm/mach-rockchip/rk3188-board-spl.c +++ b/arch/arm/mach-rockchip/rk3188-board-spl.c @@ -16,6 +16,7 @@ #include #include #include +#include #include #include #include @@ -92,18 +93,17 @@ static int setup_arm_clock(void) return ret; } +#define GRF_BASE 0x20008000 + void board_init_f(ulong dummy) { + __maybe_unused 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 /* 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); -- cgit v1.2.1