ARM: sunxi: Add support for uart0 on port F (mmc0)

Allwinner SoCs provide uart0 muxed with mmc0, which can then be used
with a micro SD breakout board. On the A23, this is the only way to
use uart0.

Signed-off-by: Chen-Yu Tsai <wens@csie.org>
Acked-by: Ian Campbell <ijc@hellion.org.uk>

diff --git a/arch/arm/cpu/armv7/sunxi/board.c b/arch/arm/cpu/armv7/sunxi/board.c
index 436df8cf2ee3d4a50aea7ed3d0e0599abc49dcaa..7d10f10fd8da9ddb7ae9ce04074191e92c533cb3 100644 (file)
--- a/arch/arm/cpu/armv7/sunxi/board.c
+++ b/arch/arm/cpu/armv7/sunxi/board.c
@@ -50,7 +50,16 @@ u32 spl_boot_mode(void)
 
 int gpio_init(void)
 {
-#if CONFIG_CONS_INDEX == 1 && (defined(CONFIG_SUN4I) || defined(CONFIG_SUN7I))
+#if CONFIG_CONS_INDEX == 1 && defined(CONFIG_UART0_PORT_F)
+#if defined(CONFIG_SUN4I) || defined(CONFIG_SUN7I)
+       /* disable GPB22,23 as uart0 tx,rx to avoid conflict */
+       sunxi_gpio_set_cfgpin(SUNXI_GPB(22), SUNXI_GPIO_INPUT);
+       sunxi_gpio_set_cfgpin(SUNXI_GPB(23), SUNXI_GPIO_INPUT);
+#endif
+       sunxi_gpio_set_cfgpin(SUNXI_GPF(2), SUNXI_GPF2_UART0_TX);
+       sunxi_gpio_set_cfgpin(SUNXI_GPF(4), SUNXI_GPF4_UART0_RX);
+       sunxi_gpio_set_pull(SUNXI_GPF(4), 1);
+#elif CONFIG_CONS_INDEX == 1 && (defined(CONFIG_SUN4I) || defined(CONFIG_SUN7I))
        sunxi_gpio_set_cfgpin(SUNXI_GPB(22), SUN4I_GPB22_UART0_TX);
        sunxi_gpio_set_cfgpin(SUNXI_GPB(23), SUN4I_GPB23_UART0_RX);
        sunxi_gpio_set_pull(SUNXI_GPB(23), SUNXI_GPIO_PULL_UP);

diff --git a/include/configs/sunxi-common.h b/include/configs/sunxi-common.h
index d55e4cab0636e55b5f0dce57bb79a2452fba1fbd..dfcb9a8e5ef8b962cffdc9a3dad6b70e5240f70e 100644 (file)
--- a/include/configs/sunxi-common.h
+++ b/include/configs/sunxi-common.h
@@ -77,6 +77,7 @@
 #define CONFIG_INITRD_TAG
 
 /* mmc config */
+#if !defined(CONFIG_UART0_PORT_F)
 #define CONFIG_MMC
 #define CONFIG_GENERIC_MMC
 #define CONFIG_CMD_MMC
@@ -84,6 +85,7 @@
 #define CONFIG_MMC_SUNXI_SLOT          0
 #define CONFIG_ENV_IS_IN_MMC
 #define CONFIG_SYS_MMC_ENV_DEV         0       /* first detected MMC controller */
+#endif
 
 /* 4MB of malloc() pool */
 #define CONFIG_SYS_MALLOC_LEN          (CONFIG_ENV_SIZE + (4 << 20))