arm: imx6q: Add Engicam i.CoreM6 Quad/Dual RQS Starter Kit initial support

Boot from MMC:
-------------
U-Boot SPL 2016.11-rc2-g217bd8e-dirty (Nov 08 2016 - 22:59:44)
Trying to boot from MMC1

U-Boot 2016.11-rc2-g217bd8e-dirty (Nov 08 2016 - 22:59:44 +0530)

CPU:   Freescale i.MX6D rev1.2 at 792 MHz
Reset cause: POR
Model: Engicam i.CoreM6 Quad/Dual RQS Starter Kit
DRAM:  512 MiB
MMC:   FSL_SDHC: 0
*** Warning - bad CRC, using default environment

In:    serial
Out:   serial
Err:   serial
Net:   CPU Net Initialization Failed
No ethernet found.
Hit any key to stop autoboot:  0
icorem6qdl-rqs>

Cc: Stefano Babic <sbabic@denx.de>
Cc: Matteo Lisi <matteo.lisi@engicam.com>
Cc: Michael Trimarchi <michael@amarulasolutions.com>
Signed-off-by: Jagan Teki <jagan@amarulasolutions.com>

5 files changed, 453 insertions, 0 deletions

diff --git a/board/engicam/icorem6_rqs/Kconfig b/board/engicam/icorem6_rqs/Kconfig
new file mode 100644
index 0000000..1352c68
--- /dev/null
+++ b/board/engicam/icorem6_rqs/Kconfig
@@ -0,0 +1,12 @@
+if TARGET_MX6Q_ICORE_RQS
+
+config SYS_BOARD
+	default "icorem6_rqs"
+
+config SYS_VENDOR
+	default "engicam"
+
+config SYS_CONFIG_NAME
+	default "imx6qdl_icore_rqs"
+
+endif
diff --git a/board/engicam/icorem6_rqs/MAINTAINERS b/board/engicam/icorem6_rqs/MAINTAINERS
new file mode 100644
index 0000000..4c6bd62
--- /dev/null
+++ b/board/engicam/icorem6_rqs/MAINTAINERS
@@ -0,0 +1,6 @@
+ICOREM6QDL_RQS BOARD
+M:	Jagan Teki <jagan@amarulasolutions.com>
+S:	Maintained
+F:	board/engicam/icorem6_rqs
+F:	include/configs/imx6qdl_icore_rqs.h
+F:	configs/imx6q_icore_rqs_mmc_defconfig
diff --git a/board/engicam/icorem6_rqs/Makefile b/board/engicam/icorem6_rqs/Makefile
new file mode 100644
index 0000000..2e3933c
--- /dev/null
+++ b/board/engicam/icorem6_rqs/Makefile
@@ -0,0 +1,6 @@
+# Copyright (C) 2016 Amarula Solutions B.V.
+#
+# SPDX-License-Identifier:	GPL-2.0+
+#
+
+obj-y  := icorem6_rqs.o
diff --git a/board/engicam/icorem6_rqs/README b/board/engicam/icorem6_rqs/README
new file mode 100644
index 0000000..f94e6e1
--- /dev/null
+++ b/board/engicam/icorem6_rqs/README
@@ -0,0 +1,30 @@
+How to use U-Boot on Engicam i.CoreM6 RQS Quad/Dual Starter Kit:
+----------------------------------------------------------------
+
+$ make mrproper
+
+- Configure U-Boot for Engicam i.CoreM6 RQS Quad/Dual:
+$ make imx6q_icore_rqs_mmc_defconfig
+
+- Build U-Boot
+$ make
+
+This will generate the SPL image called SPL and the u-boot-dtb.img.
+
+- Flash the SPL image into the micro SD card:
+
+sudo dd if=SPL of=/dev/mmcblk0 bs=1k seek=1; sync
+
+- Flash the u-boot-dtb.img image into the micro SD card:
+
+sudo dd if=u-boot-dtb.img of=/dev/mmcblk0 bs=1k seek=69; sync
+
+- Jumper settings:
+
+MMC Boot: JM3 Closed
+
+- Connect the Serial cable between the Starter Kit and the PC for the console.
+(J28 is the Linux Serial console connector)
+
+- Insert the micro SD card in the board, power it up and U-Boot messages should
+come up.
diff --git a/board/engicam/icorem6_rqs/icorem6_rqs.c b/board/engicam/icorem6_rqs/icorem6_rqs.c
new file mode 100644
index 0000000..2769177
--- /dev/null
+++ b/board/engicam/icorem6_rqs/icorem6_rqs.c
@@ -0,0 +1,399 @@
+/*
+ * Copyright (C) 2016 Amarula Solutions B.V.
+ * Copyright (C) 2016 Engicam S.r.l.
+ * Author: Jagan Teki <jagan@amarulasolutions.com>
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include <common.h>
+
+#include <asm/io.h>
+#include <asm/gpio.h>
+#include <linux/sizes.h>
+
+#include <asm/arch/clock.h>
+#include <asm/arch/crm_regs.h>
+#include <asm/arch/iomux.h>
+#include <asm/arch/mx6-pins.h>
+#include <asm/arch/sys_proto.h>
+#include <asm/imx-common/iomux-v3.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+#define UART_PAD_CTRL  (PAD_CTL_PKE | PAD_CTL_PUE |		\
+	PAD_CTL_PUS_100K_UP | PAD_CTL_SPEED_MED |		\
+	PAD_CTL_DSE_40ohm   | PAD_CTL_SRE_FAST  | PAD_CTL_HYS)
+
+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)),
+};
+
+int board_early_init_f(void)
+{
+	SETUP_IOMUX_PADS(uart4_pads);
+
+	return 0;
+}
+
+int board_init(void)
+{
+	/* Address of boot parameters */
+	gd->bd->bi_boot_params = PHYS_SDRAM + 0x100;
+
+	return 0;
+}
+
+int dram_init(void)
+{
+	gd->ram_size = imx_ddr_size();
+
+	return 0;
+}
+
+#ifdef CONFIG_SPL_BUILD
+#include <libfdt.h>
+#include <spl.h>
+
+#include <asm/arch/crm_regs.h>
+#include <asm/arch/mx6-ddr.h>
+
+/* MMC board initialization is needed till adding DM support in SPL */
+#if defined(CONFIG_FSL_ESDHC) && !defined(CONFIG_DM_MMC)
+#include <mmc.h>
+#include <fsl_esdhc.h>
+
+#define USDHC_PAD_CTRL (PAD_CTL_PKE | PAD_CTL_PUE |             \
+	PAD_CTL_PUS_47K_UP  | PAD_CTL_SPEED_HIGH |               \
+	PAD_CTL_DSE_40ohm   | PAD_CTL_SRE_FAST  | PAD_CTL_HYS)
+
+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)),
+};
+
+struct fsl_esdhc_cfg usdhc_cfg[1] = {
+	{USDHC3_BASE_ADDR, 1, 4},
+};
+
+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 USDHC3_BASE_ADDR:
+		ret = 1;
+		break;
+	}
+
+	return ret;
+}
+
+int board_mmc_init(bd_t *bis)
+{
+	int i, ret;
+
+	/*
+	* According to the board_mmc_init() the following map is done:
+	* (U-boot device node)    (Physical Port)
+	* mmc0				USDHC3
+	*/
+	for (i = 0; i < CONFIG_SYS_FSL_USDHC_NUM; i++) {
+		switch (i) {
+		case 0:
+			SETUP_IOMUX_PADS(usdhc3_pads);
+			usdhc_cfg[i].sdhc_clk = mxc_get_clock(MXC_ESDHC3_CLK);
+			break;
+		default:
+			printf("Warning - USDHC%d controller not supporting\n",
+			       i + 1);
+			return 0;
+		}
+
+		ret = fsl_esdhc_initialize(bis, &usdhc_cfg[i]);
+		if (ret) {
+			printf("Warning: failed to initialize mmc dev %d\n", i);
+			return ret;
+		}
+	}
+
+	return 0;
+}
+#endif
+
+/*
+ * Driving strength:
+ *   0x30 == 40 Ohm
+ *   0x28 == 48 Ohm
+ */
+
+#define IMX6DQ_DRIVE_STRENGTH		0x30
+#define IMX6SDL_DRIVE_STRENGTH		0x28
+
+/* configure MX6Q/DUAL mmdc DDR io registers */
+static struct mx6dq_iomux_ddr_regs mx6dq_ddr_ioregs = {
+	.dram_sdqs0 = 0x28,
+	.dram_sdqs1 = 0x28,
+	.dram_sdqs2 = 0x28,
+	.dram_sdqs3 = 0x28,
+	.dram_sdqs4 = 0x28,
+	.dram_sdqs5 = 0x28,
+	.dram_sdqs6 = 0x28,
+	.dram_sdqs7 = 0x28,
+	.dram_dqm0 = 0x28,
+	.dram_dqm1 = 0x28,
+	.dram_dqm2 = 0x28,
+	.dram_dqm3 = 0x28,
+	.dram_dqm4 = 0x28,
+	.dram_dqm5 = 0x28,
+	.dram_dqm6 = 0x28,
+	.dram_dqm7 = 0x28,
+	.dram_cas = 0x30,
+	.dram_ras = 0x30,
+	.dram_sdclk_0 = 0x30,
+	.dram_sdclk_1 = 0x30,
+	.dram_reset = 0x30,
+	.dram_sdcke0 = 0x3000,
+	.dram_sdcke1 = 0x3000,
+	.dram_sdba2 = 0x00000000,
+	.dram_sdodt0 = 0x30,
+	.dram_sdodt1 = 0x30,
+};
+
+/* configure MX6Q/DUAL mmdc GRP io registers */
+static struct mx6dq_iomux_grp_regs mx6dq_grp_ioregs = {
+	.grp_b0ds = 0x30,
+	.grp_b1ds = 0x30,
+	.grp_b2ds = 0x30,
+	.grp_b3ds = 0x30,
+	.grp_b4ds = 0x30,
+	.grp_b5ds = 0x30,
+	.grp_b6ds = 0x30,
+	.grp_b7ds = 0x30,
+	.grp_addds = 0x30,
+	.grp_ddrmode_ctl = 0x00020000,
+	.grp_ddrpke = 0x00000000,
+	.grp_ddrmode = 0x00020000,
+	.grp_ctlds = 0x30,
+	.grp_ddr_type = 0x000c0000,
+};
+
+/* configure MX6SOLO/DUALLITE mmdc DDR io registers */
+struct mx6sdl_iomux_ddr_regs mx6sdl_ddr_ioregs = {
+	.dram_sdclk_0 = 0x30,
+	.dram_sdclk_1 = 0x30,
+	.dram_cas = 0x30,
+	.dram_ras = 0x30,
+	.dram_reset = 0x30,
+	.dram_sdcke0 = 0x30,
+	.dram_sdcke1 = 0x30,
+	.dram_sdba2 = 0x00000000,
+	.dram_sdodt0 = 0x30,
+	.dram_sdodt1 = 0x30,
+	.dram_sdqs0 = 0x28,
+	.dram_sdqs1 = 0x28,
+	.dram_sdqs2 = 0x28,
+	.dram_sdqs3 = 0x28,
+	.dram_sdqs4 = 0x28,
+	.dram_sdqs5 = 0x28,
+	.dram_sdqs6 = 0x28,
+	.dram_sdqs7 = 0x28,
+	.dram_dqm0 = 0x28,
+	.dram_dqm1 = 0x28,
+	.dram_dqm2 = 0x28,
+	.dram_dqm3 = 0x28,
+	.dram_dqm4 = 0x28,
+	.dram_dqm5 = 0x28,
+	.dram_dqm6 = 0x28,
+	.dram_dqm7 = 0x28,
+};
+
+/* configure MX6SOLO/DUALLITE mmdc GRP io registers */
+struct mx6sdl_iomux_grp_regs mx6sdl_grp_ioregs = {
+	.grp_ddr_type = 0x000c0000,
+	.grp_ddrmode_ctl = 0x00020000,
+	.grp_ddrpke = 0x00000000,
+	.grp_addds = 0x30,
+	.grp_ctlds = 0x30,
+	.grp_ddrmode = 0x00020000,
+	.grp_b0ds = 0x28,
+	.grp_b1ds = 0x28,
+	.grp_b2ds = 0x28,
+	.grp_b3ds = 0x28,
+	.grp_b4ds = 0x28,
+	.grp_b5ds = 0x28,
+	.grp_b6ds = 0x28,
+	.grp_b7ds = 0x28,
+};
+
+/* mt41j256 */
+static struct mx6_ddr3_cfg mt41j256 = {
+	.mem_speed = 1066,
+	.density = 2,
+	.width = 16,
+	.banks = 8,
+	.rowaddr = 13,
+	.coladdr = 10,
+	.pagesz = 2,
+	.trcd = 1375,
+	.trcmin = 4875,
+	.trasmin = 3500,
+	.SRT = 0,
+};
+
+static struct mx6_mmdc_calibration mx6dq_mmdc_calib = {
+	.p0_mpwldectrl0 = 0x000E0009,
+	.p0_mpwldectrl1 = 0x0018000E,
+	.p1_mpwldectrl0 = 0x00000007,
+	.p1_mpwldectrl1 = 0x00000000,
+	.p0_mpdgctrl0 = 0x43280334,
+	.p0_mpdgctrl1 = 0x031C0314,
+	.p1_mpdgctrl0 = 0x4318031C,
+	.p1_mpdgctrl1 = 0x030C0258,
+	.p0_mprddlctl = 0x3E343A40,
+	.p1_mprddlctl = 0x383C3844,
+	.p0_mpwrdlctl = 0x40404440,
+	.p1_mpwrdlctl = 0x4C3E4446,
+};
+
+/* DDR 64bit */
+static struct mx6_ddr_sysinfo mem_q = {
+	.ddr_type	= DDR_TYPE_DDR3,
+	.dsize		= 2,
+	.cs1_mirror	= 0,
+	/* config for full 4GB range so that get_mem_size() works */
+	.cs_density	= 32,
+	.ncs		= 1,
+	.bi_on		= 1,
+	.rtt_nom	= 2,
+	.rtt_wr		= 2,
+	.ralat		= 5,
+	.walat		= 0,
+	.mif3_mode	= 3,
+	.rst_to_cke	= 0x23,
+	.sde_to_rst	= 0x10,
+};
+
+static struct mx6_mmdc_calibration mx6dl_mmdc_calib = {
+	.p0_mpwldectrl0 = 0x001F0024,
+	.p0_mpwldectrl1 = 0x00110018,
+	.p1_mpwldectrl0 = 0x001F0024,
+	.p1_mpwldectrl1 = 0x00110018,
+	.p0_mpdgctrl0 = 0x4230022C,
+	.p0_mpdgctrl1 = 0x02180220,
+	.p1_mpdgctrl0 = 0x42440248,
+	.p1_mpdgctrl1 = 0x02300238,
+	.p0_mprddlctl = 0x44444A48,
+	.p1_mprddlctl = 0x46484A42,
+	.p0_mpwrdlctl = 0x38383234,
+	.p1_mpwrdlctl = 0x3C34362E,
+};
+
+/* DDR 64bit 1GB */
+static struct mx6_ddr_sysinfo mem_dl = {
+	.dsize		= 2,
+	.cs1_mirror	= 0,
+	/* config for full 4GB range so that get_mem_size() works */
+	.cs_density	= 32,
+	.ncs		= 1,
+	.bi_on		= 1,
+	.rtt_nom	= 1,
+	.rtt_wr		= 1,
+	.ralat		= 5,
+	.walat		= 0,
+	.mif3_mode	= 3,
+	.rst_to_cke	= 0x23,
+	.sde_to_rst	= 0x10,
+};
+
+/* DDR 32bit 512MB */
+static struct mx6_ddr_sysinfo mem_s = {
+	.dsize		= 1,
+	.cs1_mirror	= 0,
+	/* config for full 4GB range so that get_mem_size() works */
+	.cs_density	= 32,
+	.ncs		= 1,
+	.bi_on		= 1,
+	.rtt_nom	= 1,
+	.rtt_wr		= 1,
+	.ralat		= 5,
+	.walat		= 0,
+	.mif3_mode	= 3,
+	.rst_to_cke	= 0x23,
+	.sde_to_rst	= 0x10,
+};
+
+static void ccgr_init(void)
+{
+	struct mxc_ccm_reg *ccm = (struct mxc_ccm_reg *)CCM_BASE_ADDR;
+
+	writel(0x00003F3F, &ccm->CCGR0);
+	writel(0x0030FC00, &ccm->CCGR1);
+	writel(0x000FC000, &ccm->CCGR2);
+	writel(0x3F300000, &ccm->CCGR3);
+	writel(0xFF00F300, &ccm->CCGR4);
+	writel(0x0F0000C3, &ccm->CCGR5);
+	writel(0x000003CC, &ccm->CCGR6);
+}
+
+static void gpr_init(void)
+{
+	struct iomuxc *iomux = (struct iomuxc *)IOMUXC_BASE_ADDR;
+
+	/* enable AXI cache for VDOA/VPU/IPU */
+	writel(0xF00000CF, &iomux->gpr[4]);
+	/* set IPU AXI-id0 Qos=0xf(bypass) AXI-id1 Qos=0x7 */
+	writel(0x007F007F, &iomux->gpr[6]);
+	writel(0x007F007F, &iomux->gpr[7]);
+}
+
+static void spl_dram_init(void)
+{
+	if (is_mx6solo()) {
+		mx6sdl_dram_iocfg(32, &mx6sdl_ddr_ioregs, &mx6sdl_grp_ioregs);
+		mx6_dram_cfg(&mem_s, &mx6dl_mmdc_calib, &mt41j256);
+	} else if (is_mx6dl()) {
+		mx6sdl_dram_iocfg(64, &mx6sdl_ddr_ioregs, &mx6sdl_grp_ioregs);
+		mx6_dram_cfg(&mem_dl, &mx6dl_mmdc_calib, &mt41j256);
+	} else if (is_mx6dq()) {
+		mx6dq_dram_iocfg(64, &mx6dq_ddr_ioregs, &mx6dq_grp_ioregs);
+		mx6_dram_cfg(&mem_q, &mx6dq_mmdc_calib, &mt41j256);
+	}
+
+	udelay(100);
+}
+
+void board_init_f(ulong dummy)
+{
+	ccgr_init();
+
+	/* setup AIPS and disable watchdog */
+	arch_cpu_init();
+
+	gpr_init();
+
+	/* iomux */
+	board_early_init_f();
+
+	/* setup GP timer */
+	timer_init();
+
+	/* UART clocks enabled and gd valid - init serial console */
+	preloader_console_init();
+
+	/* DDR initialization */
+	spl_dram_init();
+
+	/* Clear the BSS. */
+	memset(__bss_start, 0, __bss_end - __bss_start);
+
+	/* load/boot image from boot device */
+	board_init_r(NULL, 0);
+}
+#endif