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 <heiko@sntech.de>
Reviewed-by: Philipp Tomsich <philipp.tomsich@theobroma-systems.com>
[Fixed up to mark grf as maybe unused:]
Signed-off-by: Philipp Tomsich <philipp.tomsich@theobroma-systems.com>

1 files changed, 42 insertions, 0 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