powerpc/t1023rdb: eMMC boot without external SD card

eMMC has no CD and WP pins, it needs to add board-specific
board_mmc_getcd() and board_mmc_getwp() in SPL to support
eMMC boot without external SD card inserted.

Signed-off-by: Shengzhou Liu <Shengzhou.Liu@freescale.com>
Reviewed-by: York Sun <yorksun@freescale.com>

diff --git a/board/freescale/t102xrdb/spl.c b/board/freescale/t102xrdb/spl.c
index 1a3a996439646ef53e932b3139fe532abea9c0fc..9c581ff88e085395091ad9684933a1dee1235610 100644 (file)
--- a/board/freescale/t102xrdb/spl.c
+++ b/board/freescale/t102xrdb/spl.c
@@ -30,6 +30,30 @@ unsigned long get_board_ddr_clk(void)
        return CONFIG_DDR_CLK_FREQ;
 }
 
+#if defined(CONFIG_SPL_MMC_BOOT)
+#define GPIO1_SD_SEL 0x00020000
+int board_mmc_getcd(struct mmc *mmc)
+{
+       ccsr_gpio_t __iomem *pgpio = (void *)(CONFIG_SYS_MPC85xx_GPIO_ADDR);
+       u32 val = in_be32(&pgpio->gpdat);
+
+       /* GPIO1_14, 0: eMMC, 1: SD */
+       val &= GPIO1_SD_SEL;
+
+       return val ? -1 : 1;
+}
+
+int board_mmc_getwp(struct mmc *mmc)
+{
+       ccsr_gpio_t __iomem *pgpio = (void *)(CONFIG_SYS_MPC85xx_GPIO_ADDR);
+       u32 val = in_be32(&pgpio->gpdat);
+
+       val &= GPIO1_SD_SEL;
+
+       return val ? -1 : 0;
+}
+#endif
+
 void board_init_f(ulong bootflag)
 {
        u32 plat_ratio, sys_clk, ccb_clk;