From: Jon Nettleton jon@solid-run.com
The HB2 boards as well as rev 1.5 soms support eMMC booting as well as SDHC. Add the infrastructure to support booting these devices.
Signed-off-by: Jon Nettleton jon@solid-run.com Signed-off-by: Baruch Siach baruch@tkos.co.il --- board/solidrun/mx6cuboxi/mx6cuboxi.c | 102 ++++++++++++++++++++++++--- 1 file changed, 94 insertions(+), 8 deletions(-)
diff --git a/board/solidrun/mx6cuboxi/mx6cuboxi.c b/board/solidrun/mx6cuboxi/mx6cuboxi.c index 38d89f0130bb..932465011971 100644 --- a/board/solidrun/mx6cuboxi/mx6cuboxi.c +++ b/board/solidrun/mx6cuboxi/mx6cuboxi.c @@ -126,6 +126,20 @@ static iomux_v3_cfg_t const usdhc2_pads[] = { IOMUX_PADS(PAD_SD2_DAT3__SD2_DATA3 | MUX_PAD_CTRL(USDHC_PAD_CTRL)), };
+static iomux_v3_cfg_t const usdhc3_pads[] = { + IOMUX_PADS(PAD_SD3_CLK__SD3_CLK | MUX_PAD_CTRL(USDHC_PAD_CTRL)), + IOMUX_PADS(PAD_SD3_CMD__SD3_CMD | MUX_PAD_CTRL(USDHC_PAD_CTRL)), + IOMUX_PADS(PAD_SD3_DAT0__SD3_DATA0 | MUX_PAD_CTRL(USDHC_PAD_CTRL)), + IOMUX_PADS(PAD_SD3_DAT1__SD3_DATA1 | MUX_PAD_CTRL(USDHC_PAD_CTRL)), + IOMUX_PADS(PAD_SD3_DAT2__SD3_DATA2 | MUX_PAD_CTRL(USDHC_PAD_CTRL)), + IOMUX_PADS(PAD_SD3_DAT3__SD3_DATA3 | MUX_PAD_CTRL(USDHC_PAD_CTRL)), + IOMUX_PADS(PAD_SD3_DAT4__SD3_DATA4 | MUX_PAD_CTRL(USDHC_PAD_CTRL)), + IOMUX_PADS(PAD_SD3_DAT5__SD3_DATA5 | MUX_PAD_CTRL(USDHC_PAD_CTRL)), + IOMUX_PADS(PAD_SD3_DAT6__SD3_DATA6 | MUX_PAD_CTRL(USDHC_PAD_CTRL)), + IOMUX_PADS(PAD_SD3_DAT7__SD3_DATA7 | MUX_PAD_CTRL(USDHC_PAD_CTRL)), + IOMUX_PADS(PAD_SD3_RST__SD3_RESET | MUX_PAD_CTRL(USDHC_PAD_CTRL)), +}; + static iomux_v3_cfg_t const board_detect[] = { /* These pins are for sensing if it is a CuBox-i or a HummingBoard */ IOMUX_PADS(PAD_KEY_ROW1__GPIO4_IO09 | MUX_PAD_CTRL(UART_PAD_CTRL)), @@ -148,23 +162,95 @@ static void setup_iomux_uart(void) SETUP_IOMUX_PADS(uart1_pads); }
-static struct fsl_esdhc_cfg usdhc_cfg[1] = { - {USDHC2_BASE_ADDR}, +static struct fsl_esdhc_cfg usdhc_cfg = { + .esdhc_base = USDHC2_BASE_ADDR, + .max_bus_width = 4, };
+static struct fsl_esdhc_cfg emmc_cfg = { + .esdhc_base = USDHC3_BASE_ADDR, + .max_bus_width = 8, +}; + +int board_mmc_get_env_dev(int devno) +{ + return devno - 1; +} + +#define USDHC2_CD_GPIO IMX_GPIO_NR(1, 4) + int board_mmc_getcd(struct mmc *mmc) { - return 1; /* uSDHC2 is always present */ + struct fsl_esdhc_cfg *cfg = mmc->priv; + int ret = 0; + + switch (cfg->esdhc_base) { + case USDHC2_BASE_ADDR: + ret = !gpio_get_value(USDHC2_CD_GPIO); + break; + case USDHC3_BASE_ADDR: + ret = 1; /* eMMC/uSDHC3 has no CD GPIO */ + break; + } + + return ret; }
-int board_mmc_init(bd_t *bis) +static int mmc_init_main(bd_t *bis) { + int ret; + + /* + * Following map is done: + * (U-Boot device node) (Physical Port) + * mmc0 Carrier board MicroSD + * mmc1 SOM eMMC + */ SETUP_IOMUX_PADS(usdhc2_pads); - usdhc_cfg[0].esdhc_base = USDHC2_BASE_ADDR; - usdhc_cfg[0].sdhc_clk = mxc_get_clock(MXC_ESDHC2_CLK); - gd->arch.sdhc_clk = usdhc_cfg[0].sdhc_clk; + usdhc_cfg.sdhc_clk = mxc_get_clock(MXC_ESDHC2_CLK); + ret = fsl_esdhc_initialize(bis, &usdhc_cfg); + if (ret) + return ret; + + SETUP_IOMUX_PADS(usdhc3_pads); + emmc_cfg.sdhc_clk = mxc_get_clock(MXC_ESDHC3_CLK); + return fsl_esdhc_initialize(bis, &emmc_cfg); +} + +static int mmc_init_spl(bd_t *bis) +{ + struct src *psrc = (struct src *)SRC_BASE_ADDR; + unsigned 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 SD2 + * 0x2 SD3 + */ + switch (reg & 0x3) { + case 0x1: + SETUP_IOMUX_PADS(usdhc2_pads); + usdhc_cfg.sdhc_clk = mxc_get_clock(MXC_ESDHC2_CLK); + gd->arch.sdhc_clk = usdhc_cfg.sdhc_clk; + return fsl_esdhc_initialize(bis, &usdhc_cfg); + case 0x2: + SETUP_IOMUX_PADS(usdhc3_pads); + emmc_cfg.sdhc_clk = mxc_get_clock(MXC_ESDHC3_CLK); + gd->arch.sdhc_clk = emmc_cfg.sdhc_clk; + return fsl_esdhc_initialize(bis, &emmc_cfg); + } + + return -ENODEV; +} + +int board_mmc_init(bd_t *bis) +{ + if (IS_ENABLED(CONFIG_SPL_BUILD)) + return mmc_init_spl(bis);
- return fsl_esdhc_initialize(bis, &usdhc_cfg[0]); + return mmc_init_main(bis); }
static iomux_v3_cfg_t const enet_pads[] = {