mx6sx: Add initial support for UDOO Neo Board

UDOO Neo Board is a development board from Seco that has three models:
 - UDOO Neo Basic
 - UDOO Neo Basic Kick Starter
 - UDOO Neo Extended
 - UDOO Neo Full

All versions are based on the i.MX6 SoloX processor.

For more details about the UDOO Neo board, please refer to:
http://www.udoo.org/udoo-neo/

This work is based on a previous commit of Francesco Montefoschi
<francesco.monte@gmail.com>:
https://github.com/fmntf/u-boot/commit/877b71184a5105e708024f232d36aed574961844

Only tested on the UDOO Neo Full board.

Signed-off-by: Breno Lima <breno.lima@nxp.com>
Reviewed-by: Fabio Estevam <fabio.estevam@nxp.com>

4 files changed, 466 insertions, 0 deletions

diff --git a/board/udoo/neo/Kconfig b/board/udoo/neo/Kconfig
new file mode 100644
index 00000000000..8f474df2487
--- /dev/null
+++ b/board/udoo/neo/Kconfig
@@ -0,0 +1,12 @@
+if TARGET_UDOO_NEO
+
+config SYS_VENDOR
+	default "udoo"
+
+config SYS_BOARD
+	default "neo"
+
+config SYS_CONFIG_NAME
+	default "udoo_neo"
+
+endif
diff --git a/board/udoo/neo/MAINTAINERS b/board/udoo/neo/MAINTAINERS
new file mode 100644
index 00000000000..743fe33d059
--- /dev/null
+++ b/board/udoo/neo/MAINTAINERS
@@ -0,0 +1,7 @@
+UDOO NEO BOARD
+M:	Breno Lima <breno.lima@nxp.com>
+M:	Francesco Montefoschi <francesco.montefoschi@udoo.org>
+S:	Maintained
+F:	board/udoo/neo/
+F:	include/configs/udoo_neo.h
+F:	configs/udoo_neo_defconfig
diff --git a/board/udoo/neo/Makefile b/board/udoo/neo/Makefile
new file mode 100644
index 00000000000..150cbc1a971
--- /dev/null
+++ b/board/udoo/neo/Makefile
@@ -0,0 +1,6 @@
+# (C) Copyright 2015 UDOO Team
+#
+# SPDX-License-Identifier:	GPL-2.0+
+#
+
+obj-y  := neo.o
diff --git a/board/udoo/neo/neo.c b/board/udoo/neo/neo.c
new file mode 100644
index 00000000000..7f17469d9af
--- /dev/null
+++ b/board/udoo/neo/neo.c
@@ -0,0 +1,441 @@
+/*
+ * Copyright (C) 2014-2015 Freescale Semiconductor, Inc.
+ * Copyright (C) Jasbir Matharu
+ * Copyright (C) UDOO Team
+ *
+ * Author: Breno Lima <breno.lima@nxp.com>
+ * Author: Francesco Montefoschi <francesco.monte@gmail.com>
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include <asm/arch/clock.h>
+#include <asm/arch/imx-regs.h>
+#include <asm/arch/iomux.h>
+#include <asm/arch/mx6-pins.h>
+#include <asm/gpio.h>
+#include <asm/imx-common/iomux-v3.h>
+#include <mmc.h>
+#include <fsl_esdhc.h>
+#include <asm/arch/crm_regs.h>
+#include <asm/io.h>
+#include <asm/arch/sys_proto.h>
+#include <spl.h>
+#include <linux/sizes.h>
+#include <common.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+enum {
+	UDOO_NEO_TYPE_BASIC,
+	UDOO_NEO_TYPE_BASIC_KS,
+	UDOO_NEO_TYPE_FULL,
+	UDOO_NEO_TYPE_EXTENDED,
+};
+
+#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)
+
+#define USDHC_PAD_CTRL (PAD_CTL_PKE | PAD_CTL_PUE |		\
+	PAD_CTL_PUS_22K_UP  | PAD_CTL_SPEED_LOW |		\
+	PAD_CTL_DSE_80ohm   | PAD_CTL_SRE_FAST  | PAD_CTL_HYS)
+
+#define WDOG_PAD_CTRL (PAD_CTL_PUE | PAD_CTL_PKE | PAD_CTL_SPEED_MED |	\
+	PAD_CTL_DSE_40ohm)
+
+#define BOARD_DETECT_PAD_CTRL (PAD_CTL_PKE | PAD_CTL_PUE |		\
+	PAD_CTL_PUS_100K_UP | PAD_CTL_SPEED_MED |		\
+	PAD_CTL_DSE_34ohm | PAD_CTL_HYS | PAD_CTL_SRE_FAST)
+#define BOARD_DETECT_PAD_CFG (MUX_PAD_CTRL(BOARD_DETECT_PAD_CTRL) |	\
+	MUX_MODE_SION)
+
+int dram_init(void)
+{
+	gd->ram_size = imx_ddr_size();
+	return 0;
+}
+
+static iomux_v3_cfg_t const uart1_pads[] = {
+	MX6_PAD_GPIO1_IO04__UART1_TX | MUX_PAD_CTRL(UART_PAD_CTRL),
+	MX6_PAD_GPIO1_IO05__UART1_RX | MUX_PAD_CTRL(UART_PAD_CTRL),
+};
+
+static iomux_v3_cfg_t const usdhc2_pads[] = {
+	MX6_PAD_SD2_CLK__USDHC2_CLK | MUX_PAD_CTRL(USDHC_PAD_CTRL),
+	MX6_PAD_SD2_CMD__USDHC2_CMD | MUX_PAD_CTRL(USDHC_PAD_CTRL),
+	MX6_PAD_SD2_DATA0__USDHC2_DATA0 | MUX_PAD_CTRL(USDHC_PAD_CTRL),
+	MX6_PAD_SD2_DATA1__USDHC2_DATA1 | MUX_PAD_CTRL(USDHC_PAD_CTRL),
+	MX6_PAD_SD2_DATA2__USDHC2_DATA2 | MUX_PAD_CTRL(USDHC_PAD_CTRL),
+	MX6_PAD_SD2_DATA3__USDHC2_DATA3 | MUX_PAD_CTRL(USDHC_PAD_CTRL),
+	/* CD pin */
+	MX6_PAD_SD1_DATA0__GPIO6_IO_2 | MUX_PAD_CTRL(NO_PAD_CTRL),
+	/* Power */
+	MX6_PAD_SD1_CMD__GPIO6_IO_1 | MUX_PAD_CTRL(NO_PAD_CTRL),
+};
+
+static iomux_v3_cfg_t const board_recognition_pads[] = {
+	/*Connected to R184*/
+	MX6_PAD_NAND_READY_B__GPIO4_IO_13 | BOARD_DETECT_PAD_CFG,
+	/*Connected to R185*/
+	MX6_PAD_NAND_ALE__GPIO4_IO_0 | BOARD_DETECT_PAD_CFG,
+};
+
+static iomux_v3_cfg_t const usdhc3_pads[] = {
+    /* Configured for WLAN */
+	MX6_PAD_SD3_CLK__USDHC3_CLK | MUX_PAD_CTRL(USDHC_PAD_CTRL),
+	MX6_PAD_SD3_CMD__USDHC3_CMD | MUX_PAD_CTRL(USDHC_PAD_CTRL),
+	MX6_PAD_SD3_DATA0__USDHC3_DATA0 | MUX_PAD_CTRL(USDHC_PAD_CTRL),
+	MX6_PAD_SD3_DATA1__USDHC3_DATA1 | MUX_PAD_CTRL(USDHC_PAD_CTRL),
+	MX6_PAD_SD3_DATA2__USDHC3_DATA2 | MUX_PAD_CTRL(USDHC_PAD_CTRL),
+	MX6_PAD_SD3_DATA3__USDHC3_DATA3 | MUX_PAD_CTRL(USDHC_PAD_CTRL),
+};
+
+static iomux_v3_cfg_t const wdog_b_pad = {
+	MX6_PAD_GPIO1_IO13__GPIO1_IO_13 | MUX_PAD_CTRL(WDOG_PAD_CTRL),
+};
+
+static iomux_v3_cfg_t const peri_3v3_pads[] = {
+	MX6_PAD_QSPI1A_DATA0__GPIO4_IO_16 | MUX_PAD_CTRL(NO_PAD_CTRL),
+};
+
+static void setup_iomux_uart(void)
+{
+	imx_iomux_v3_setup_multiple_pads(uart1_pads, ARRAY_SIZE(uart1_pads));
+}
+
+int board_init(void)
+{
+	/* Address of boot parameters */
+	gd->bd->bi_boot_params = PHYS_SDRAM + 0x100;
+
+	/*
+	 * Because kernel set WDOG_B mux before pad with the commone pinctrl
+	 * framwork now and wdog reset will be triggered once set WDOG_B mux
+	 * with default pad setting, we set pad setting here to workaround this.
+	 * Since imx_iomux_v3_setup_pad also set mux before pad setting, we set
+	 * as GPIO mux firstly here to workaround it.
+	 */
+	imx_iomux_v3_setup_pad(wdog_b_pad);
+
+	/* Enable PERI_3V3, which is used by SD2, ENET, LVDS, BT */
+	imx_iomux_v3_setup_multiple_pads(peri_3v3_pads,
+					 ARRAY_SIZE(peri_3v3_pads));
+
+	/* Active high for ncp692 */
+	gpio_direction_output(IMX_GPIO_NR(4, 16) , 1);
+
+	return 0;
+}
+
+static int get_board_value(void)
+{
+	int r184, r185;
+
+	imx_iomux_v3_setup_multiple_pads(board_recognition_pads,
+					 ARRAY_SIZE(board_recognition_pads));
+
+	gpio_direction_input(IMX_GPIO_NR(4, 13));
+	gpio_direction_input(IMX_GPIO_NR(4, 0));
+
+	r184 = gpio_get_value(IMX_GPIO_NR(4, 13));
+	r185 = gpio_get_value(IMX_GPIO_NR(4, 0));
+
+	/*
+	 * Machine selection -
+	 * Machine          r184,    r185
+	 * ---------------------------------
+	 * Basic              0        0
+	 * Basic Ks           0        1
+	 * Full               1        0
+	 * Extended           1        1
+	 */
+
+	return (r184 << 1) + r185;
+}
+
+int board_early_init_f(void)
+{
+	setup_iomux_uart();
+
+	return 0;
+}
+
+static struct fsl_esdhc_cfg usdhc_cfg[2] = {
+	{USDHC2_BASE_ADDR, 0, 4},
+	{USDHC3_BASE_ADDR, 0, 4},
+};
+
+#define USDHC2_PWR_GPIO IMX_GPIO_NR(6, 1)
+#define USDHC2_CD_GPIO	IMX_GPIO_NR(6, 2)
+
+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 USDHC2_BASE_ADDR:
+		ret = !gpio_get_value(USDHC2_CD_GPIO);
+		break;
+	}
+
+	return ret;
+}
+
+int board_mmc_init(bd_t *bis)
+{
+#ifndef CONFIG_SPL_BUILD
+	int i, ret;
+
+	/*
+	 * According to the board_mmc_init() the following map is done:
+	 * (U-boot device node)    (Physical Port)
+	 * mmc0                    USDHC2
+	 */
+	for (i = 0; i < CONFIG_SYS_FSL_USDHC_NUM; i++) {
+		switch (i) {
+		case 0:
+			imx_iomux_v3_setup_multiple_pads(
+				usdhc2_pads, ARRAY_SIZE(usdhc2_pads));
+			usdhc_cfg[0].sdhc_clk = mxc_get_clock(MXC_ESDHC2_CLK);
+			gpio_direction_input(USDHC2_CD_GPIO);
+			gpio_direction_output(USDHC2_PWR_GPIO, 1);
+			break;
+		case 1:
+			imx_iomux_v3_setup_multiple_pads(
+				usdhc3_pads, ARRAY_SIZE(usdhc3_pads));
+			usdhc_cfg[1].sdhc_clk = mxc_get_clock(MXC_ESDHC3_CLK);
+			break;
+		default:
+			printf("Warning: you configured more USDHC controllers\
+				(%d) than supported by the board\n", i + 1);
+			return -EINVAL;
+			}
+
+			ret = fsl_esdhc_initialize(bis, &usdhc_cfg[i]);
+			if (ret) {
+				printf("Warning:\
+					failed to initialize mmc dev %d\n", i);
+				return ret;
+			}
+	}
+
+	return 0;
+#else
+	struct src *src_regs = (struct src *)SRC_BASE_ADDR;
+	u32 val;
+	u32 port;
+
+	val = readl(&src_regs->sbmr1);
+
+	if ((val & 0xc0) != 0x40) {
+		printf("Not boot from USDHC!\n");
+		return -EINVAL;
+	}
+
+	port = (val >> 11) & 0x3;
+	printf("port %d\n", port);
+	switch (port) {
+	case 1:
+		imx_iomux_v3_setup_multiple_pads(
+			usdhc2_pads, ARRAY_SIZE(usdhc2_pads));
+		usdhc_cfg[0].sdhc_clk = mxc_get_clock(MXC_ESDHC2_CLK);
+		usdhc_cfg[0].esdhc_base = USDHC2_BASE_ADDR;
+		gpio_direction_input(USDHC2_CD_GPIO);
+		gpio_direction_output(USDHC2_PWR_GPIO, 1);
+		break;
+	case 2:
+		imx_iomux_v3_setup_multiple_pads(
+			usdhc3_pads, ARRAY_SIZE(usdhc3_pads));
+		usdhc_cfg[1].sdhc_clk = mxc_get_clock(MXC_ESDHC3_CLK);
+		usdhc_cfg[1].esdhc_base = USDHC3_BASE_ADDR;
+		break;
+	}
+
+	gd->arch.sdhc_clk = usdhc_cfg[0].sdhc_clk;
+	return fsl_esdhc_initialize(bis, &usdhc_cfg[0]);
+#endif
+}
+
+char *board_string(void)
+{
+	switch (get_board_value()) {
+	case UDOO_NEO_TYPE_BASIC:
+		return "BASIC";
+	case UDOO_NEO_TYPE_BASIC_KS:
+		return "BASICKS";
+	case UDOO_NEO_TYPE_FULL:
+		return "FULL";
+	case UDOO_NEO_TYPE_EXTENDED:
+		return "EXTENDED";
+	}
+	return "UNDEFINED";
+}
+
+int checkboard(void)
+{
+	printf("Board: UDOO Neo %s\n", board_string());
+	return 0;
+}
+
+int board_late_init(void)
+{
+#ifdef CONFIG_ENV_VARS_UBOOT_RUNTIME_CONFIG
+	setenv("board_name", board_string());
+#endif
+
+	return 0;
+}
+
+#ifdef CONFIG_SPL_BUILD
+
+#include <libfdt.h>
+#include <asm/arch/mx6-ddr.h>
+
+static const struct mx6sx_iomux_ddr_regs mx6_ddr_ioregs = {
+	.dram_dqm0 = 0x00000028,
+	.dram_dqm1 = 0x00000028,
+	.dram_dqm2 = 0x00000028,
+	.dram_dqm3 = 0x00000028,
+	.dram_ras = 0x00000020,
+	.dram_cas = 0x00000020,
+	.dram_odt0 = 0x00000020,
+	.dram_odt1 = 0x00000020,
+	.dram_sdba2 = 0x00000000,
+	.dram_sdcke0 = 0x00003000,
+	.dram_sdcke1 = 0x00003000,
+	.dram_sdclk_0 = 0x00000030,
+	.dram_sdqs0 = 0x00000028,
+	.dram_sdqs1 = 0x00000028,
+	.dram_sdqs2 = 0x00000028,
+	.dram_sdqs3 = 0x00000028,
+	.dram_reset = 0x00000020,
+};
+
+static const struct mx6sx_iomux_grp_regs mx6_grp_ioregs = {
+	.grp_addds = 0x00000020,
+	.grp_ddrmode_ctl = 0x00020000,
+	.grp_ddrpke = 0x00000000,
+	.grp_ddrmode = 0x00020000,
+	.grp_b0ds = 0x00000028,
+	.grp_b1ds = 0x00000028,
+	.grp_ctlds = 0x00000020,
+	.grp_ddr_type = 0x000c0000,
+	.grp_b2ds = 0x00000028,
+	.grp_b3ds = 0x00000028,
+};
+
+static const struct mx6_mmdc_calibration neo_mmcd_calib = {
+	.p0_mpwldectrl0 = 0x000E000B,
+	.p0_mpwldectrl1 = 0x000E0010,
+	.p0_mpdgctrl0 = 0x41600158,
+	.p0_mpdgctrl1 = 0x01500140,
+	.p0_mprddlctl = 0x3A383E3E,
+	.p0_mpwrdlctl = 0x3A383C38,
+};
+
+static const struct mx6_mmdc_calibration neo_basic_mmcd_calib = {
+	.p0_mpwldectrl0 = 0x001E0022,
+	.p0_mpwldectrl1 = 0x001C0019,
+	.p0_mpdgctrl0 = 0x41540150,
+	.p0_mpdgctrl1 = 0x01440138,
+	.p0_mprddlctl = 0x403E4644,
+	.p0_mpwrdlctl = 0x3C3A4038,
+};
+
+/* MT41K256M16 */
+static struct mx6_ddr3_cfg neo_mem_ddr = {
+	.mem_speed = 1600,
+	.density = 4,
+	.width = 16,
+	.banks = 8,
+	.rowaddr = 15,
+	.coladdr = 10,
+	.pagesz = 2,
+	.trcd = 1375,
+	.trcmin = 4875,
+	.trasmin = 3500,
+};
+
+/* MT41K128M16 */
+static struct mx6_ddr3_cfg neo_basic_mem_ddr = {
+	.mem_speed = 1600,
+	.density = 2,
+	.width = 16,
+	.banks = 8,
+	.rowaddr = 14,
+	.coladdr = 10,
+	.pagesz = 2,
+	.trcd = 1375,
+	.trcmin = 4875,
+	.trasmin = 3500,
+};
+
+static void ccgr_init(void)
+{
+	struct mxc_ccm_reg *ccm = (struct mxc_ccm_reg *)CCM_BASE_ADDR;
+
+	writel(0xFFFFFFFF, &ccm->CCGR0);
+	writel(0xFFFFFFFF, &ccm->CCGR1);
+	writel(0xFFFFFFFF, &ccm->CCGR2);
+	writel(0xFFFFFFFF, &ccm->CCGR3);
+	writel(0xFFFFFFFF, &ccm->CCGR4);
+	writel(0xFFFFFFFF, &ccm->CCGR5);
+	writel(0xFFFFFFFF, &ccm->CCGR6);
+	writel(0xFFFFFFFF, &ccm->CCGR7);
+}
+
+static void spl_dram_init(void)
+{
+	int board = get_board_value();
+
+	struct mx6_ddr_sysinfo sysinfo = {
+		.dsize = 1, /* width of data bus: 1 = 32 bits */
+		.cs_density = 24,
+		.ncs = 1,
+		.cs1_mirror = 0,
+		.rtt_wr = 2,
+		.rtt_nom = 2,		/* RTT_Nom = RZQ/2 */
+		.walat = 1,		/* Write additional latency */
+		.ralat = 5,		/* Read additional latency */
+		.mif3_mode = 3,		/* Command prediction working mode */
+		.bi_on = 1,		/* Bank interleaving enabled */
+		.sde_to_rst = 0x10,	/* 14 cycles, 200us (JEDEC default) */
+		.rst_to_cke = 0x23,	/* 33 cycles, 500us (JEDEC default) */
+	};
+
+	mx6sx_dram_iocfg(32, &mx6_ddr_ioregs, &mx6_grp_ioregs);
+	if (board == UDOO_NEO_TYPE_BASIC || board == UDOO_NEO_TYPE_BASIC_KS)
+		mx6_dram_cfg(&sysinfo, &neo_basic_mmcd_calib,
+			     &neo_basic_mem_ddr);
+	else
+		mx6_dram_cfg(&sysinfo, &neo_mmcd_calib, &neo_mem_ddr);
+}
+
+void board_init_f(ulong dummy)
+{
+	ccgr_init();
+
+	/* setup AIPS and disable watchdog */
+	arch_cpu_init();
+
+	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