[U-Boot] [PATCH] ARM: imx6q_logic: Fix MMC2 booting
Adam Ford
aford173 at gmail.com
Tue Oct 8 13:01:12 UTC 2019
With the reverting of a previous change to spl_boot_device,
this board needs a new solution to determining if we're booting
from MMC1 or MMC2.
This patch creates board_boot_order function which overrides the
standard, and returns not only MMC1, or MMC2, but also can fall
back to NAND or the serial downloader should other boot options
fail.
Signed-off-by: Adam Ford <aford173 at gmail.com>
diff --git a/board/logicpd/imx6/imx6logic.c b/board/logicpd/imx6/imx6logic.c
index 7a59b89d94..63893f5f33 100644
--- a/board/logicpd/imx6/imx6logic.c
+++ b/board/logicpd/imx6/imx6logic.c
@@ -207,6 +207,35 @@ struct fsl_esdhc_cfg usdhc_cfg[] = {
{USDHC2_BASE_ADDR} /* Baseboard */
};
+void board_boot_order(u32 *spl_boot_list)
+{
+ struct src *psrc = (struct src *)SRC_BASE_ADDR;
+ unsigned int reg = readl(&psrc->sbmr1) >> 11;
+ /*
+ * Upon reading BOOT_CFG register the following map is done:
+ * Bit 11 and 12 of BOOT_CFG register can determine the current
+ * mmc port
+ * 0x1 SD1-SOM
+ * 0x2 SD2-Baseboard
+ */
+
+ reg &= 0x3; /* Only care about bottom 2 bits */
+ switch (reg) {
+ case 0:
+ spl_boot_list[0] = BOOT_DEVICE_MMC1;
+ break;
+ case 1:
+ spl_boot_list[0] = BOOT_DEVICE_MMC2;
+ break;
+ }
+
+ /* If we cannot find a valid MMC/SD card, try NAND */
+ spl_boot_list[1] = BOOT_DEVICE_NAND;
+
+ /* As a last resort, use serial downloader */
+ spl_boot_list[2] = BOOT_DEVICE_BOARD;
+}
+
int board_mmc_init(bd_t *bis)
{
struct src *psrc = (struct src *)SRC_BASE_ADDR;
--
2.17.1
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