arm: mx6: add support for Compulab cm-fx6 CoM

Add initial support for Compulab CM-FX6 CoM.
Support includes MMC, SPI flash, and SPL with dynamic DRAM detection.

Cc: Igor Grinberg <grinberg@compulab.co.il>
Cc: Stefano Babic <sbabic@denx.de>
Cc: Tom Rini <trini@ti.com>
Cc: Marek Vasut <marex@denx.de>
Cc: Simon Glass <sjg@chromium.org>
Acked-by: Marek Vasut <marex@denx.de>
Signed-off-by: Nikita Kiryanov <nikita@compulab.co.il>

8 files changed, 619 insertions, 0 deletions

diff --git a/board/compulab/cm_fx6/Kconfig b/board/compulab/cm_fx6/Kconfig
new file mode 100644
index 0000000000..42a84380f2
--- /dev/null
+++ b/board/compulab/cm_fx6/Kconfig
@@ -0,0 +1,23 @@
+if TARGET_CM_FX6
+
+config SYS_CPU
+	string
+	default "armv7"
+
+config SYS_BOARD
+	string
+	default "cm_fx6"
+
+config SYS_VENDOR
+	string
+	default "compulab"
+
+config SYS_SOC
+	string
+	default "mx6"
+
+config SYS_CONFIG_NAME
+	string
+	default "cm_fx6"
+
+endif
diff --git a/board/compulab/cm_fx6/MAINTAINERS b/board/compulab/cm_fx6/MAINTAINERS
new file mode 100644
index 0000000000..5b2623a664
--- /dev/null
+++ b/board/compulab/cm_fx6/MAINTAINERS
@@ -0,0 +1,6 @@
+CM_FX6 BOARD
+M:	Nikita Kiryanov <nikita@compulab.co.il>
+S:	Maintained
+F:	board/compulab/cm_fx6/
+F:	include/configs/cm_fx6.h
+F:	configs/cm_fx6_defconfig
diff --git a/board/compulab/cm_fx6/Makefile b/board/compulab/cm_fx6/Makefile
new file mode 100644
index 0000000000..3e5c9034df
--- /dev/null
+++ b/board/compulab/cm_fx6/Makefile
@@ -0,0 +1,12 @@
+#
+# (C) Copyright 2014 CompuLab, Ltd. <www.compulab.co.il>
+#
+# Authors: Nikita Kiryanov <nikita@compulab.co.il>
+#
+# SPDX-License-Identifier:	GPL-2.0+
+#
+ifdef CONFIG_SPL_BUILD
+obj-y = common.o spl.o
+else
+obj-y = common.o cm_fx6.o
+endif
diff --git a/board/compulab/cm_fx6/cm_fx6.c b/board/compulab/cm_fx6/cm_fx6.c
new file mode 100644
index 0000000000..b5895816cb
--- /dev/null
+++ b/board/compulab/cm_fx6/cm_fx6.c
@@ -0,0 +1,111 @@
+/*
+ * Board functions for Compulab CM-FX6 board
+ *
+ * Copyright (C) 2014, Compulab Ltd - http://compulab.co.il/
+ *
+ * Author: Nikita Kiryanov <nikita@compulab.co.il>
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include <common.h>
+#include <fsl_esdhc.h>
+#include <asm/arch/sys_proto.h>
+#include "common.h"
+
+DECLARE_GLOBAL_DATA_PTR;
+
+#ifdef CONFIG_FSL_ESDHC
+static struct fsl_esdhc_cfg usdhc_cfg[3] = {
+	{USDHC1_BASE_ADDR},
+	{USDHC2_BASE_ADDR},
+	{USDHC3_BASE_ADDR},
+};
+
+static enum mxc_clock usdhc_clk[3] = {
+	MXC_ESDHC_CLK,
+	MXC_ESDHC2_CLK,
+	MXC_ESDHC3_CLK,
+};
+
+int board_mmc_init(bd_t *bis)
+{
+	int i;
+
+	cm_fx6_set_usdhc_iomux();
+	for (i = 0; i < CONFIG_SYS_FSL_USDHC_NUM; i++) {
+		usdhc_cfg[i].sdhc_clk = mxc_get_clock(usdhc_clk[i]);
+		usdhc_cfg[i].max_bus_width = 4;
+		fsl_esdhc_initialize(bis, &usdhc_cfg[i]);
+		enable_usdhc_clk(1, i);
+	}
+
+	return 0;
+}
+#endif
+
+int board_init(void)
+{
+	gd->bd->bi_boot_params = PHYS_SDRAM_1 + 0x100;
+	return 0;
+}
+
+int checkboard(void)
+{
+	puts("Board: CM-FX6\n");
+	return 0;
+}
+
+void dram_init_banksize(void)
+{
+	gd->bd->bi_dram[0].start = PHYS_SDRAM_1;
+	gd->bd->bi_dram[1].start = PHYS_SDRAM_2;
+
+	switch (gd->ram_size) {
+	case 0x10000000: /* DDR_16BIT_256MB */
+		gd->bd->bi_dram[0].size = 0x10000000;
+		gd->bd->bi_dram[1].size = 0;
+		break;
+	case 0x20000000: /* DDR_32BIT_512MB */
+		gd->bd->bi_dram[0].size = 0x20000000;
+		gd->bd->bi_dram[1].size = 0;
+		break;
+	case 0x40000000:
+		if (is_cpu_type(MXC_CPU_MX6SOLO)) { /* DDR_32BIT_1GB */
+			gd->bd->bi_dram[0].size = 0x20000000;
+			gd->bd->bi_dram[1].size = 0x20000000;
+		} else { /* DDR_64BIT_1GB */
+			gd->bd->bi_dram[0].size = 0x40000000;
+			gd->bd->bi_dram[1].size = 0;
+		}
+		break;
+	case 0x80000000: /* DDR_64BIT_2GB */
+		gd->bd->bi_dram[0].size = 0x40000000;
+		gd->bd->bi_dram[1].size = 0x40000000;
+		break;
+	case 0xEFF00000: /* DDR_64BIT_4GB */
+		gd->bd->bi_dram[0].size = 0x70000000;
+		gd->bd->bi_dram[1].size = 0x7FF00000;
+		break;
+	}
+}
+
+int dram_init(void)
+{
+	gd->ram_size = imx_ddr_size();
+	switch (gd->ram_size) {
+	case 0x10000000:
+	case 0x20000000:
+	case 0x40000000:
+	case 0x80000000:
+		break;
+	case 0xF0000000:
+		gd->ram_size -= 0x100000;
+		break;
+	default:
+		printf("ERROR: Unsupported DRAM size 0x%lx\n", gd->ram_size);
+		return -1;
+	}
+
+	return 0;
+}
diff --git a/board/compulab/cm_fx6/common.c b/board/compulab/cm_fx6/common.c
new file mode 100644
index 0000000000..1f3967995f
--- /dev/null
+++ b/board/compulab/cm_fx6/common.c
@@ -0,0 +1,84 @@
+/*
+ * Code used by both U-Boot and SPL for Compulab CM-FX6
+ *
+ * Copyright (C) 2014, Compulab Ltd - http://compulab.co.il/
+ *
+ * Author: Nikita Kiryanov <nikita@compulab.co.il>
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include <common.h>
+#include <asm/arch/sys_proto.h>
+#include <asm/gpio.h>
+#include <fsl_esdhc.h>
+#include "common.h"
+
+DECLARE_GLOBAL_DATA_PTR;
+
+#ifdef CONFIG_FSL_ESDHC
+#define USDHC_PAD_CTRL (PAD_CTL_PUS_47K_UP |			\
+	PAD_CTL_SPEED_LOW | PAD_CTL_DSE_80ohm |			\
+	PAD_CTL_SRE_FAST  | PAD_CTL_HYS)
+
+static iomux_v3_cfg_t const usdhc_pads[] = {
+	IOMUX_PADS(PAD_SD1_CLK__SD1_CLK    | MUX_PAD_CTRL(USDHC_PAD_CTRL)),
+	IOMUX_PADS(PAD_SD1_CMD__SD1_CMD    | MUX_PAD_CTRL(USDHC_PAD_CTRL)),
+	IOMUX_PADS(PAD_SD1_DAT0__SD1_DATA0 | MUX_PAD_CTRL(USDHC_PAD_CTRL)),
+	IOMUX_PADS(PAD_SD1_DAT1__SD1_DATA1 | MUX_PAD_CTRL(USDHC_PAD_CTRL)),
+	IOMUX_PADS(PAD_SD1_DAT2__SD1_DATA2 | MUX_PAD_CTRL(USDHC_PAD_CTRL)),
+	IOMUX_PADS(PAD_SD1_DAT3__SD1_DATA3 | MUX_PAD_CTRL(USDHC_PAD_CTRL)),
+
+	IOMUX_PADS(PAD_SD2_CLK__SD2_CLK    | MUX_PAD_CTRL(USDHC_PAD_CTRL)),
+	IOMUX_PADS(PAD_SD2_CMD__SD2_CMD    | MUX_PAD_CTRL(USDHC_PAD_CTRL)),
+	IOMUX_PADS(PAD_SD2_DAT0__SD2_DATA0 | MUX_PAD_CTRL(USDHC_PAD_CTRL)),
+	IOMUX_PADS(PAD_SD2_DAT1__SD2_DATA1 | MUX_PAD_CTRL(USDHC_PAD_CTRL)),
+	IOMUX_PADS(PAD_SD2_DAT2__SD2_DATA2 | MUX_PAD_CTRL(USDHC_PAD_CTRL)),
+	IOMUX_PADS(PAD_SD2_DAT3__SD2_DATA3 | MUX_PAD_CTRL(USDHC_PAD_CTRL)),
+
+	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)),
+};
+
+void cm_fx6_set_usdhc_iomux(void)
+{
+	SETUP_IOMUX_PADS(usdhc_pads);
+}
+
+/* CINS bit doesn't work, so always try to access the MMC card */
+int board_mmc_getcd(struct mmc *mmc)
+{
+	return 1;
+}
+#endif
+
+#ifdef CONFIG_MXC_SPI
+#define ECSPI_PAD_CTRL (PAD_CTL_SRE_FAST | PAD_CTL_SPEED_MED | \
+		PAD_CTL_PUS_100K_DOWN | PAD_CTL_DSE_40ohm | PAD_CTL_HYS)
+
+static iomux_v3_cfg_t const ecspi_pads[] = {
+	IOMUX_PADS(PAD_EIM_D16__ECSPI1_SCLK | MUX_PAD_CTRL(ECSPI_PAD_CTRL)),
+	IOMUX_PADS(PAD_EIM_D17__ECSPI1_MISO | MUX_PAD_CTRL(ECSPI_PAD_CTRL)),
+	IOMUX_PADS(PAD_EIM_D18__ECSPI1_MOSI | MUX_PAD_CTRL(ECSPI_PAD_CTRL)),
+	IOMUX_PADS(PAD_EIM_EB2__GPIO2_IO30  | MUX_PAD_CTRL(ECSPI_PAD_CTRL)),
+	IOMUX_PADS(PAD_EIM_D19__ECSPI1_SS1  | MUX_PAD_CTRL(ECSPI_PAD_CTRL)),
+};
+
+void cm_fx6_set_ecspi_iomux(void)
+{
+	SETUP_IOMUX_PADS(ecspi_pads);
+}
+
+int board_spi_cs_gpio(unsigned bus, unsigned cs)
+{
+	return (bus == 0 && cs == 0) ? (CM_FX6_ECSPI_BUS0_CS0) : -1;
+}
+#endif
diff --git a/board/compulab/cm_fx6/common.h b/board/compulab/cm_fx6/common.h
new file mode 100644
index 0000000000..347d07b0b9
--- /dev/null
+++ b/board/compulab/cm_fx6/common.h
@@ -0,0 +1,20 @@
+/*
+ * Copyright (C) 2014, Compulab Ltd - http://compulab.co.il/
+ *
+ * Author: Nikita Kiryanov <nikita@compulab.co.il>
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include <asm/arch/mx6-pins.h>
+#include <asm/arch/clock.h>
+
+#define UART_PAD_CTRL  (PAD_CTL_PUS_100K_UP |	\
+			PAD_CTL_SPEED_MED | PAD_CTL_DSE_40ohm |	\
+			PAD_CTL_SRE_FAST  | PAD_CTL_HYS)
+
+#define CM_FX6_ECSPI_BUS0_CS0	IMX_GPIO_NR(2, 30)
+#define CM_FX6_GREEN_LED	IMX_GPIO_NR(2, 31)
+
+void cm_fx6_set_usdhc_iomux(void);
+void cm_fx6_set_ecspi_iomux(void);
diff --git a/board/compulab/cm_fx6/imximage.cfg b/board/compulab/cm_fx6/imximage.cfg
new file mode 100644
index 0000000000..420947e9ca
--- /dev/null
+++ b/board/compulab/cm_fx6/imximage.cfg
@@ -0,0 +1,8 @@
+/*
+ * Copyright (C) 2014, Compulab Ltd - http://compulab.co.il/
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+IMAGE_VERSION 2
+BOOT_FROM	sd
diff --git a/board/compulab/cm_fx6/spl.c b/board/compulab/cm_fx6/spl.c
new file mode 100644
index 0000000000..a3abc7b3f3
--- /dev/null
+++ b/board/compulab/cm_fx6/spl.c
@@ -0,0 +1,355 @@
+/*
+ * SPL specific code for Compulab CM-FX6 board
+ *
+ * Copyright (C) 2014, Compulab Ltd - http://compulab.co.il/
+ *
+ * Author: Nikita Kiryanov <nikita@compulab.co.il>
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include <common.h>
+#include <spl.h>
+#include <asm/io.h>
+#include <asm/gpio.h>
+#include <asm/arch/mx6-ddr.h>
+#include <asm/arch/clock.h>
+#include <asm/arch/sys_proto.h>
+#include <asm/imx-common/iomux-v3.h>
+#include <fsl_esdhc.h>
+#include "common.h"
+
+DECLARE_GLOBAL_DATA_PTR;
+
+enum ddr_config {
+	DDR_16BIT_256MB,
+	DDR_32BIT_512MB,
+	DDR_32BIT_1GB,
+	DDR_64BIT_1GB,
+	DDR_64BIT_2GB,
+	DDR_64BIT_4GB,
+	DDR_UNKNOWN,
+};
+
+/*
+ * Below DRAM_RESET[DDR_SEL] = 0 which is incorrect according to
+ * Freescale QRM, but this is exactly the value used by the automatic
+ * calibration script and it works also in all our tests, so we leave
+ * it as is at this point.
+ */
+#define CM_FX6_DDR_IOMUX_CFG \
+	.dram_sdqs0	= 0x00000038, \
+	.dram_sdqs1	= 0x00000038, \
+	.dram_sdqs2	= 0x00000038, \
+	.dram_sdqs3	= 0x00000038, \
+	.dram_sdqs4	= 0x00000038, \
+	.dram_sdqs5	= 0x00000038, \
+	.dram_sdqs6	= 0x00000038, \
+	.dram_sdqs7	= 0x00000038, \
+	.dram_dqm0	= 0x00000038, \
+	.dram_dqm1	= 0x00000038, \
+	.dram_dqm2	= 0x00000038, \
+	.dram_dqm3	= 0x00000038, \
+	.dram_dqm4	= 0x00000038, \
+	.dram_dqm5	= 0x00000038, \
+	.dram_dqm6	= 0x00000038, \
+	.dram_dqm7	= 0x00000038, \
+	.dram_cas	= 0x00000038, \
+	.dram_ras	= 0x00000038, \
+	.dram_sdclk_0	= 0x00000038, \
+	.dram_sdclk_1	= 0x00000038, \
+	.dram_sdcke0	= 0x00003000, \
+	.dram_sdcke1	= 0x00003000, \
+	.dram_reset	= 0x00000038, \
+	.dram_sdba2	= 0x00000000, \
+	.dram_sdodt0	= 0x00000038, \
+	.dram_sdodt1	= 0x00000038,
+
+#define CM_FX6_GPR_IOMUX_CFG \
+	.grp_b0ds	= 0x00000038, \
+	.grp_b1ds	= 0x00000038, \
+	.grp_b2ds	= 0x00000038, \
+	.grp_b3ds	= 0x00000038, \
+	.grp_b4ds	= 0x00000038, \
+	.grp_b5ds	= 0x00000038, \
+	.grp_b6ds	= 0x00000038, \
+	.grp_b7ds	= 0x00000038, \
+	.grp_addds	= 0x00000038, \
+	.grp_ddrmode_ctl = 0x00020000, \
+	.grp_ddrpke	= 0x00000000, \
+	.grp_ddrmode	= 0x00020000, \
+	.grp_ctlds	= 0x00000038, \
+	.grp_ddr_type	= 0x000C0000,
+
+static struct mx6sdl_iomux_ddr_regs ddr_iomux_s = { CM_FX6_DDR_IOMUX_CFG };
+static struct mx6sdl_iomux_grp_regs grp_iomux_s = { CM_FX6_GPR_IOMUX_CFG };
+static struct mx6dq_iomux_ddr_regs ddr_iomux_q = { CM_FX6_DDR_IOMUX_CFG };
+static struct mx6dq_iomux_grp_regs grp_iomux_q = { CM_FX6_GPR_IOMUX_CFG };
+
+static struct mx6_mmdc_calibration cm_fx6_calib_s = {
+	.p0_mpwldectrl0	= 0x005B0061,
+	.p0_mpwldectrl1	= 0x004F0055,
+	.p0_mpdgctrl0	= 0x0314030C,
+	.p0_mpdgctrl1	= 0x025C0268,
+	.p0_mprddlctl	= 0x42464646,
+	.p0_mpwrdlctl	= 0x36322C34,
+};
+
+static struct mx6_ddr_sysinfo cm_fx6_sysinfo_s = {
+	.cs1_mirror	= 1,
+	.cs_density	= 16,
+	.bi_on		= 1,
+	.rtt_nom	= 1,
+	.rtt_wr		= 0,
+	.ralat		= 5,
+	.walat		= 1,
+	.mif3_mode	= 3,
+	.rst_to_cke	= 0x23,
+	.sde_to_rst	= 0x10,
+};
+
+static struct mx6_ddr3_cfg cm_fx6_ddr3_cfg_s = {
+	.mem_speed	= 800,
+	.density	= 4,
+	.rowaddr	= 14,
+	.coladdr	= 10,
+	.pagesz		= 2,
+	.trcd		= 1800,
+	.trcmin		= 5200,
+	.trasmin	= 3600,
+	.SRT		= 0,
+};
+
+static void spl_mx6s_dram_init(enum ddr_config dram_config, bool reset)
+{
+	if (reset)
+		((struct mmdc_p_regs *)MX6_MMDC_P0_MDCTL)->mdmisc = 2;
+
+	switch (dram_config) {
+	case DDR_16BIT_256MB:
+		cm_fx6_sysinfo_s.dsize = 0;
+		cm_fx6_sysinfo_s.ncs = 1;
+		break;
+	case DDR_32BIT_512MB:
+		cm_fx6_sysinfo_s.dsize = 1;
+		cm_fx6_sysinfo_s.ncs = 1;
+		break;
+	case DDR_32BIT_1GB:
+		cm_fx6_sysinfo_s.dsize = 1;
+		cm_fx6_sysinfo_s.ncs = 2;
+		break;
+	default:
+		puts("Tried to setup invalid DDR configuration\n");
+		hang();
+	}
+
+	mx6_dram_cfg(&cm_fx6_sysinfo_s, &cm_fx6_calib_s, &cm_fx6_ddr3_cfg_s);
+	udelay(100);
+}
+
+static struct mx6_mmdc_calibration cm_fx6_calib_q = {
+	.p0_mpwldectrl0	= 0x00630068,
+	.p0_mpwldectrl1	= 0x0068005D,
+	.p0_mpdgctrl0	= 0x04140428,
+	.p0_mpdgctrl1	= 0x037C037C,
+	.p0_mprddlctl	= 0x3C30303A,
+	.p0_mpwrdlctl	= 0x3A344038,
+	.p1_mpwldectrl0	= 0x0035004C,
+	.p1_mpwldectrl1	= 0x00170026,
+	.p1_mpdgctrl0	= 0x0374037C,
+	.p1_mpdgctrl1	= 0x0350032C,
+	.p1_mprddlctl	= 0x30322A3C,
+	.p1_mpwrdlctl	= 0x48304A3E,
+};
+
+static struct mx6_ddr_sysinfo cm_fx6_sysinfo_q = {
+	.cs_density	= 16,
+	.cs1_mirror	= 1,
+	.bi_on		= 1,
+	.rtt_nom	= 1,
+	.rtt_wr		= 0,
+	.ralat		= 5,
+	.walat		= 1,
+	.mif3_mode	= 3,
+	.rst_to_cke	= 0x23,
+	.sde_to_rst	= 0x10,
+};
+
+static struct mx6_ddr3_cfg cm_fx6_ddr3_cfg_q = {
+	.mem_speed	= 1066,
+	.density	= 4,
+	.rowaddr	= 14,
+	.coladdr	= 10,
+	.pagesz		= 2,
+	.trcd		= 1324,
+	.trcmin		= 59500,
+	.trasmin	= 9750,
+	.SRT		= 0,
+};
+
+static void spl_mx6q_dram_init(enum ddr_config dram_config, bool reset)
+{
+	if (reset)
+		((struct mmdc_p_regs *)MX6_MMDC_P0_MDCTL)->mdmisc = 2;
+
+	cm_fx6_ddr3_cfg_q.rowaddr = 14;
+	switch (dram_config) {
+	case DDR_16BIT_256MB:
+		cm_fx6_sysinfo_q.dsize = 0;
+		cm_fx6_sysinfo_q.ncs = 1;
+		break;
+	case DDR_32BIT_512MB:
+		cm_fx6_sysinfo_q.dsize = 1;
+		cm_fx6_sysinfo_q.ncs = 1;
+		break;
+	case DDR_64BIT_1GB:
+		cm_fx6_sysinfo_q.dsize = 2;
+		cm_fx6_sysinfo_q.ncs = 1;
+		break;
+	case DDR_64BIT_2GB:
+		cm_fx6_sysinfo_q.dsize = 2;
+		cm_fx6_sysinfo_q.ncs = 2;
+		break;
+	case DDR_64BIT_4GB:
+		cm_fx6_sysinfo_q.dsize = 2;
+		cm_fx6_sysinfo_q.ncs = 2;
+		cm_fx6_ddr3_cfg_q.rowaddr = 15;
+		break;
+	default:
+		puts("Tried to setup invalid DDR configuration\n");
+		hang();
+	}
+
+	mx6_dram_cfg(&cm_fx6_sysinfo_q, &cm_fx6_calib_q, &cm_fx6_ddr3_cfg_q);
+	udelay(100);
+}
+
+static int cm_fx6_spl_dram_init(void)
+{
+	unsigned long bank1_size, bank2_size;
+
+	switch (get_cpu_type()) {
+	case MXC_CPU_MX6SOLO:
+		mx6sdl_dram_iocfg(64, &ddr_iomux_s, &grp_iomux_s);
+
+		spl_mx6s_dram_init(DDR_32BIT_1GB, false);
+		bank1_size = get_ram_size((long int *)PHYS_SDRAM_1, 0x80000000);
+		if (bank1_size == 0x40000000)
+			return 0;
+
+		if (bank1_size == 0x20000000) {
+			spl_mx6s_dram_init(DDR_32BIT_512MB, true);
+			return 0;
+		}
+
+		spl_mx6s_dram_init(DDR_16BIT_256MB, true);
+		bank1_size = get_ram_size((long int *)PHYS_SDRAM_1, 0x80000000);
+		if (bank1_size == 0x10000000)
+			return 0;
+
+		break;
+	case MXC_CPU_MX6D:
+	case MXC_CPU_MX6Q:
+		mx6dq_dram_iocfg(64, &ddr_iomux_q, &grp_iomux_q);
+
+		spl_mx6q_dram_init(DDR_64BIT_4GB, false);
+		bank1_size = get_ram_size((long int *)PHYS_SDRAM_1, 0x80000000);
+		if (bank1_size == 0x80000000)
+			return 0;
+
+		if (bank1_size == 0x40000000) {
+			bank2_size = get_ram_size((long int *)PHYS_SDRAM_2,
+								0x80000000);
+			if (bank2_size == 0x40000000) {
+				/* Don't do a full reset here */
+				spl_mx6q_dram_init(DDR_64BIT_2GB, false);
+			} else {
+				spl_mx6q_dram_init(DDR_64BIT_1GB, true);
+			}
+
+			return 0;
+		}
+
+		spl_mx6q_dram_init(DDR_32BIT_512MB, true);
+		bank1_size = get_ram_size((long int *)PHYS_SDRAM_1, 0x80000000);
+		if (bank1_size == 0x20000000)
+			return 0;
+
+		spl_mx6q_dram_init(DDR_16BIT_256MB, true);
+		bank1_size = get_ram_size((long int *)PHYS_SDRAM_1, 0x80000000);
+		if (bank1_size == 0x10000000)
+			return 0;
+
+		break;
+	}
+
+	return -1;
+}
+
+static iomux_v3_cfg_t const uart4_pads[] = {
+	IOMUX_PADS(PAD_KEY_COL0__UART4_TX_DATA | MUX_PAD_CTRL(UART_PAD_CTRL)),
+	IOMUX_PADS(PAD_KEY_ROW0__UART4_RX_DATA | MUX_PAD_CTRL(UART_PAD_CTRL)),
+};
+
+static void cm_fx6_setup_uart(void)
+{
+	SETUP_IOMUX_PADS(uart4_pads);
+	enable_uart_clk(1);
+}
+
+#ifdef CONFIG_SPL_SPI_SUPPORT
+static void cm_fx6_setup_ecspi(void)
+{
+	cm_fx6_set_ecspi_iomux();
+	enable_cspi_clock(1, 0);
+}
+#else
+static void cm_fx6_setup_ecspi(void) { }
+#endif
+
+void board_init_f(ulong dummy)
+{
+	gd = &gdata;
+	arch_cpu_init();
+	timer_init();
+	cm_fx6_setup_ecspi();
+	cm_fx6_setup_uart();
+	get_clocks();
+	preloader_console_init();
+	gpio_direction_output(CM_FX6_GREEN_LED, 1);
+	if (cm_fx6_spl_dram_init()) {
+		puts("!!!ERROR!!! DRAM detection failed!!!\n");
+		hang();
+	}
+
+	memset(__bss_start, 0, __bss_end - __bss_start);
+	board_init_r(NULL, 0);
+}
+
+void spl_board_init(void)
+{
+	u32 boot_device = spl_boot_device();
+
+	if (boot_device == BOOT_DEVICE_SPI)
+		puts("Booting from SPI flash\n");
+	else if (boot_device == BOOT_DEVICE_MMC1)
+		puts("Booting from MMC\n");
+	else
+		puts("Unknown boot device\n");
+}
+
+#ifdef CONFIG_SPL_MMC_SUPPORT
+static struct fsl_esdhc_cfg usdhc_cfg = {
+	.esdhc_base = USDHC3_BASE_ADDR,
+	.max_bus_width = 4,
+};
+
+int board_mmc_init(bd_t *bis)
+{
+	cm_fx6_set_usdhc_iomux();
+
+	usdhc_cfg.sdhc_clk = mxc_get_clock(MXC_ESDHC3_CLK);
+
+	return fsl_esdhc_initialize(bis, &usdhc_cfg);
+}
+#endif