@@ -123,5 +123,5 @@ struct sunxi_mmc {
#define SUNXI_MMC_IDIE_TXIRQ (0x1 << 0)
#define SUNXI_MMC_IDIE_RXIRQ (0x1 << 1)
-int sunxi_mmc_init(int sdc_no);
+struct mmc *sunxi_mmc_init(int sdc_no);
#endif /* _SUNXI_MMC_H */
@@ -12,6 +12,7 @@
*/
#include <common.h>
+#include <mmc.h>
#ifdef CONFIG_AXP152_POWER
#include <axp152.h>
#endif
@@ -104,11 +105,36 @@ static void mmc_pinmux_setup(int sdc)
int board_mmc_init(bd_t *bis)
{
+ __maybe_unused struct mmc *mmc0, *mmc1;
+ __maybe_unused char buf[512];
+
mmc_pinmux_setup(CONFIG_MMC_SUNXI_SLOT);
- sunxi_mmc_init(CONFIG_MMC_SUNXI_SLOT);
+ mmc0 = sunxi_mmc_init(CONFIG_MMC_SUNXI_SLOT);
+ if (!mmc0)
+ return -1;
+
#if CONFIG_MMC_SUNXI_SLOT_EXTRA != -1
mmc_pinmux_setup(CONFIG_MMC_SUNXI_SLOT_EXTRA);
- sunxi_mmc_init(CONFIG_MMC_SUNXI_SLOT_EXTRA);
+ mmc1 = sunxi_mmc_init(CONFIG_MMC_SUNXI_SLOT_EXTRA);
+ if (!mmc1)
+ return -1;
+#endif
+
+#if CONFIG_MMC_SUNXI_SLOT == 0 && CONFIG_MMC_SUNXI_SLOT_EXTRA == 2
+ /*
+ * Both mmc0 and mmc2 are bootable, figure out where we're booting
+ * from. Try mmc0 first, just like the brom does.
+ */
+ if (mmc_getcd(mmc0) && mmc_init(mmc0) == 0 &&
+ mmc0->block_dev.block_read(0, 16, 1, buf) == 1) {
+ buf[12] = 0;
+ if (strcmp(&buf[4], "eGON.BT0") == 0)
+ return 0;
+ }
+
+ /* no bootable card in mmc0, so we must be booting from mmc2, swap */
+ mmc0->block_dev.dev = 1;
+ mmc1->block_dev.dev = 0;
#endif
return 0;
@@ -373,7 +373,7 @@ static const struct mmc_ops sunxi_mmc_ops = {
.getcd = sunxi_mmc_getcd,
};
-int sunxi_mmc_init(int sdc_no)
+struct mmc *sunxi_mmc_init(int sdc_no)
{
struct mmc_config *cfg = &mmc_host[sdc_no].cfg;
@@ -396,8 +396,5 @@ int sunxi_mmc_init(int sdc_no)
mmc_resource_init(sdc_no);
mmc_clk_io_on(sdc_no);
- if (mmc_create(cfg, &mmc_host[sdc_no]) == NULL)
- return -1;
-
- return 0;
+ return mmc_create(cfg, &mmc_host[sdc_no]);
}
sunxi SOCs can boot from both mmc0 and mmc2, detect from which one we're booting, and make that one "mmc dev 0" so that a single u-boot binary can be used for both the onboard eMMC and for external sdcards. When we're booting from mmc2, we make it dev 0 because that is where the SPL will load the tertiary payload (the actual u-boot binary in our case) from, see: common/spl/spl_mmc.c, which has dev 0 hardcoded everywhere. Signed-off-by: Hans de Goede <hdegoede@redhat.com> --- arch/arm/include/asm/arch-sunxi/mmc.h | 2 +- board/sunxi/board.c | 30 ++++++++++++++++++++++++++++-- drivers/mmc/sunxi_mmc.c | 7 ++----- 3 files changed, 31 insertions(+), 8 deletions(-)