ARM: imx: pico-imx8mq: Add support for Technexion Pico-iMX8MQ
Add initial support for Technexion Pico-iMX8MQ SoM on PicoPI carrier
board. Currently working is ethernet, serial, eMMC. DT is imported
from Linux 5.4.28 ("462afcd6e7ea") .
Signed-off-by: Marek Vasut <marek.vasut@gmail.com>
Cc: Stefano Babic <sbabic@denx.de>
Cc: Fabio Estevam <festevam@gmail.com>
Cc: "NXP i.MX U-Boot Team" <uboot-imx@nxp.com>
Cc: Peng Fan <peng.fan@nxp.com>
Reviewed-by: Stefano Babic <sbabic@denx.de>
diff --git a/board/technexion/pico-imx8mq/spl.c b/board/technexion/pico-imx8mq/spl.c
new file mode 100644
index 0000000..1588f17
--- /dev/null
+++ b/board/technexion/pico-imx8mq/spl.c
@@ -0,0 +1,223 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright 2018 NXP
+ */
+
+#include <common.h>
+#include <hang.h>
+#include <asm/arch/clock.h>
+#include <asm/arch/ddr.h>
+#include <asm/arch/imx8mq_pins.h>
+#include <asm/arch/sys_proto.h>
+#include <asm/io.h>
+#include <asm/mach-imx/gpio.h>
+#include <asm/mach-imx/iomux-v3.h>
+#include <asm/mach-imx/mxc_i2c.h>
+#include <errno.h>
+#include <fsl_esdhc_imx.h>
+#include <mmc.h>
+#include <spl.h>
+
+#include "lpddr4_timing.h"
+
+DECLARE_GLOBAL_DATA_PTR;
+
+#define DDR_DET_1 IMX_GPIO_NR(3, 11)
+#define DDR_DET_2 IMX_GPIO_NR(3, 12)
+#define DDR_DET_3 IMX_GPIO_NR(3, 13)
+
+static iomux_v3_cfg_t const verdet_pads[] = {
+ IMX8MQ_PAD_NAND_DATA01__GPIO3_IO7 | MUX_PAD_CTRL(NO_PAD_CTRL),
+ IMX8MQ_PAD_NAND_DATA02__GPIO3_IO8 | MUX_PAD_CTRL(NO_PAD_CTRL),
+ IMX8MQ_PAD_NAND_DATA03__GPIO3_IO9 | MUX_PAD_CTRL(NO_PAD_CTRL),
+ IMX8MQ_PAD_NAND_DATA04__GPIO3_IO10 | MUX_PAD_CTRL(NO_PAD_CTRL),
+ IMX8MQ_PAD_NAND_DATA05__GPIO3_IO11 | MUX_PAD_CTRL(NO_PAD_CTRL),
+ IMX8MQ_PAD_NAND_DATA06__GPIO3_IO12 | MUX_PAD_CTRL(NO_PAD_CTRL),
+ IMX8MQ_PAD_NAND_DATA07__GPIO3_IO13 | MUX_PAD_CTRL(NO_PAD_CTRL),
+};
+
+/*
+ * DDR_DET_1 DDR_DET_2 DDR_DET_3
+ * 0 0 1 4G LPDDR4
+ * 1 1 1 3G LPDDR4
+ * 1 1 0 2G LPDDR4
+ * 1 0 1 1G LPDDR4
+ */
+static void spl_dram_init(void)
+{
+ struct dram_timing_info *dram_timing;
+ u8 ddr = 0, size;
+
+ imx_iomux_v3_setup_multiple_pads(verdet_pads, ARRAY_SIZE(verdet_pads));
+
+ gpio_request(DDR_DET_1, "ddr_det_1");
+ gpio_direction_input(DDR_DET_1);
+ gpio_request(DDR_DET_2, "ddr_det_2");
+ gpio_direction_input(DDR_DET_2);
+ gpio_request(DDR_DET_3, "ddr_det_3");
+ gpio_direction_input(DDR_DET_3);
+
+ ddr |= !!gpio_get_value(DDR_DET_3) << 0;
+ ddr |= !!gpio_get_value(DDR_DET_2) << 1;
+ ddr |= !!gpio_get_value(DDR_DET_1) << 2;
+
+ switch (ddr) {
+ case 0x1:
+ size = 4;
+ dram_timing = &dram_timing_4gb;
+ break;
+ case 0x7:
+ size = 3;
+ dram_timing = &dram_timing_3gb;
+ break;
+ case 0x6:
+ size = 2;
+ dram_timing = &dram_timing_2gb;
+ break;
+ case 0x5:
+ size = 1;
+ dram_timing = &dram_timing_1gb;
+ break;
+ default:
+ puts("Unknown DDR type!!!\n");
+ return;
+ }
+
+ printf("%s: LPDDR4 %d GiB\n", __func__, size);
+ ddr_init(dram_timing);
+ writel(size, M4_BOOTROM_BASE_ADDR);
+}
+
+#define USDHC2_CD_GPIO IMX_GPIO_NR(2, 12)
+#define USDHC1_PWR_GPIO IMX_GPIO_NR(2, 10)
+#define USDHC2_PWR_GPIO IMX_GPIO_NR(2, 19)
+
+int board_mmc_getcd(struct mmc *mmc)
+{
+ struct fsl_esdhc_cfg *cfg = (struct fsl_esdhc_cfg *)mmc->priv;
+ int ret = 0;
+
+ switch (cfg->esdhc_base) {
+ case USDHC1_BASE_ADDR:
+ ret = 1;
+ break;
+ case USDHC2_BASE_ADDR:
+ ret = !gpio_get_value(USDHC2_CD_GPIO);
+ return ret;
+ }
+
+ return 1;
+}
+
+#define USDHC_PAD_CTRL (PAD_CTL_DSE6 | PAD_CTL_HYS | PAD_CTL_PUE | \
+ PAD_CTL_FSEL2)
+#define USDHC_GPIO_PAD_CTRL (PAD_CTL_PUE | PAD_CTL_DSE1)
+
+static iomux_v3_cfg_t const usdhc1_pads[] = {
+ IMX8MQ_PAD_SD1_CLK__USDHC1_CLK | MUX_PAD_CTRL(USDHC_PAD_CTRL),
+ IMX8MQ_PAD_SD1_CMD__USDHC1_CMD | MUX_PAD_CTRL(USDHC_PAD_CTRL),
+ IMX8MQ_PAD_SD1_DATA0__USDHC1_DATA0 | MUX_PAD_CTRL(USDHC_PAD_CTRL),
+ IMX8MQ_PAD_SD1_DATA1__USDHC1_DATA1 | MUX_PAD_CTRL(USDHC_PAD_CTRL),
+ IMX8MQ_PAD_SD1_DATA2__USDHC1_DATA2 | MUX_PAD_CTRL(USDHC_PAD_CTRL),
+ IMX8MQ_PAD_SD1_DATA3__USDHC1_DATA3 | MUX_PAD_CTRL(USDHC_PAD_CTRL),
+ IMX8MQ_PAD_SD1_DATA4__USDHC1_DATA4 | MUX_PAD_CTRL(USDHC_PAD_CTRL),
+ IMX8MQ_PAD_SD1_DATA5__USDHC1_DATA5 | MUX_PAD_CTRL(USDHC_PAD_CTRL),
+ IMX8MQ_PAD_SD1_DATA6__USDHC1_DATA6 | MUX_PAD_CTRL(USDHC_PAD_CTRL),
+ IMX8MQ_PAD_SD1_DATA7__USDHC1_DATA7 | MUX_PAD_CTRL(USDHC_PAD_CTRL),
+ IMX8MQ_PAD_SD1_RESET_B__GPIO2_IO10 | MUX_PAD_CTRL(NO_PAD_CTRL),
+};
+
+static iomux_v3_cfg_t const usdhc2_pads[] = {
+ IMX8MQ_PAD_SD2_CLK__USDHC2_CLK | MUX_PAD_CTRL(USDHC_PAD_CTRL),
+ IMX8MQ_PAD_SD2_CMD__USDHC2_CMD | MUX_PAD_CTRL(USDHC_PAD_CTRL),
+ IMX8MQ_PAD_SD2_DATA0__USDHC2_DATA0 | MUX_PAD_CTRL(USDHC_PAD_CTRL),
+ IMX8MQ_PAD_SD2_DATA1__USDHC2_DATA1 | MUX_PAD_CTRL(USDHC_PAD_CTRL),
+ IMX8MQ_PAD_SD2_DATA2__USDHC2_DATA2 | MUX_PAD_CTRL(USDHC_PAD_CTRL),
+ IMX8MQ_PAD_SD2_DATA3__USDHC2_DATA3 | MUX_PAD_CTRL(USDHC_PAD_CTRL),
+ IMX8MQ_PAD_SD2_CD_B__GPIO2_IO12 | MUX_PAD_CTRL(USDHC_GPIO_PAD_CTRL),
+ IMX8MQ_PAD_SD2_RESET_B__GPIO2_IO19 | MUX_PAD_CTRL(USDHC_GPIO_PAD_CTRL),
+};
+
+static struct fsl_esdhc_cfg usdhc_cfg[2] = {
+ {USDHC1_BASE_ADDR, 0, 8},
+ {USDHC2_BASE_ADDR, 0, 4},
+};
+
+int board_mmc_init(bd_t *bis)
+{
+ int ret;
+ /*
+ * According to the board_mmc_init() the following map is done:
+ * (U-Boot device node) (Physical Port)
+ * mmc0 USDHC1
+ * mmc1 USDHC2
+ */
+ init_clk_usdhc(0);
+ usdhc_cfg[0].sdhc_clk = mxc_get_clock(USDHC1_CLK_ROOT);
+ imx_iomux_v3_setup_multiple_pads(usdhc1_pads, ARRAY_SIZE(usdhc1_pads));
+ gpio_request(USDHC1_PWR_GPIO, "usdhc1_reset");
+ gpio_direction_output(USDHC1_PWR_GPIO, 0);
+ udelay(500);
+ gpio_direction_output(USDHC1_PWR_GPIO, 1);
+ ret = fsl_esdhc_initialize(bis, &usdhc_cfg[0]);
+ if (ret)
+ return ret;
+
+ init_clk_usdhc(1);
+ usdhc_cfg[1].sdhc_clk = mxc_get_clock(USDHC2_CLK_ROOT);
+ imx_iomux_v3_setup_multiple_pads(usdhc2_pads, ARRAY_SIZE(usdhc2_pads));
+ gpio_request(USDHC2_PWR_GPIO, "usdhc2_reset");
+ gpio_direction_output(USDHC2_PWR_GPIO, 0);
+ udelay(500);
+ gpio_direction_output(USDHC2_PWR_GPIO, 1);
+ return fsl_esdhc_initialize(bis, &usdhc_cfg[1]);
+}
+
+void spl_board_init(void)
+{
+ puts("Normal Boot\n");
+}
+
+#ifdef CONFIG_SPL_LOAD_FIT
+int board_fit_config_name_match(const char *name)
+{
+ /* Just empty function now - can't decide what to choose */
+ debug("%s: %s\n", __func__, name);
+
+ return 0;
+}
+#endif
+
+void board_init_f(ulong dummy)
+{
+ int ret;
+
+ /* Clear global data */
+ memset((void *)gd, 0, sizeof(gd_t));
+
+ arch_cpu_init();
+
+ init_uart_clk(0);
+
+ board_early_init_f();
+
+ timer_init();
+
+ preloader_console_init();
+
+ /* Clear the BSS. */
+ memset(__bss_start, 0, __bss_end - __bss_start);
+
+ ret = spl_init();
+ if (ret) {
+ debug("spl_init() failed: %d\n", ret);
+ hang();
+ }
+
+ enable_tzc380();
+
+ /* DDR initialization */
+ spl_dram_init();
+
+ board_init_r(NULL, 0);
+}