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mx6cuboxi: customize board_boot_order to access eMMC
In SPL legacy code only one MMC device is created, based on BOOT_CFG register, which can be either SD or eMMC. In this context board_boot_order return always MMC1 when configure to boot from SD/eMMC. After switching to DM both SD and eMMC devices are created based on the information available on DT, but as board_boot_order only returns MMC1 is not possible to boot from eMMC. This patch customizes board_boot_order taking into account BOOT_CFG register to point to correct MMC1 / MMC2 device. Additionally, handle IO mux for the desired boot device. Signed-off-by: Walter Lozano <walter.lozano@collabora.com>
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1 changed files with 48 additions and 0 deletions
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@ -529,6 +529,54 @@ int board_fit_config_name_match(const char *name)
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return strcmp(name, tmp_name);
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}
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void board_boot_order(u32 *spl_boot_list)
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{
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struct src *psrc = (struct src *)SRC_BASE_ADDR;
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unsigned int reg = readl(&psrc->sbmr1) >> 11;
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u32 boot_mode = imx6_src_get_boot_mode() & IMX6_BMODE_MASK;
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unsigned int bmode = readl(&src_base->sbmr2);
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/* If bmode is serial or USB phy is active, return serial */
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if (((bmode >> 24) & 0x03) == 0x01 || is_usbotg_phy_active()) {
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spl_boot_list[0] = BOOT_DEVICE_BOARD;
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return;
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}
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switch (boot_mode >> IMX6_BMODE_SHIFT) {
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case IMX6_BMODE_SD:
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case IMX6_BMODE_ESD:
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case IMX6_BMODE_MMC:
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case IMX6_BMODE_EMMC:
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/*
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* Upon reading BOOT_CFG register the following map is done:
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* Bit 11 and 12 of BOOT_CFG register can determine the current
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* mmc port
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* 0x1 SD2
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* 0x2 SD3
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*/
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reg &= 0x3; /* Only care about bottom 2 bits */
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switch (reg) {
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case 1:
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SETUP_IOMUX_PADS(usdhc2_pads);
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spl_boot_list[0] = BOOT_DEVICE_MMC1;
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break;
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case 2:
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SETUP_IOMUX_PADS(usdhc3_pads);
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spl_boot_list[0] = BOOT_DEVICE_MMC2;
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break;
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}
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break;
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default:
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/* By default use USB downloader */
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spl_boot_list[0] = BOOT_DEVICE_BOARD;
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break;
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}
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/* As a last resort, use serial downloader */
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spl_boot_list[1] = BOOT_DEVICE_BOARD;
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}
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#ifdef CONFIG_SPL_BUILD
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#include <asm/arch/mx6-ddr.h>
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static const struct mx6dq_iomux_ddr_regs mx6q_ddr_ioregs = {
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