board/liteboard: Add support for liteBoard

liteBoard is a development board which uses liteSOM as its base.

Hardware specification:
 * liteSOM (i.MX6UL, DRAM, eMMC)
 * Ethernet PHY (id 0)
 * USB host (usb_otg1)
 * MicroSD slot (uSDHC1)

Signed-off-by: Marcin Niestroj <m.niestroj@grinn-global.com>

5 files changed, 342 insertions, 0 deletions

diff --git a/board/grinn/liteboard/Kconfig b/board/grinn/liteboard/Kconfig
new file mode 100644
index 0000000..e035872
--- /dev/null
+++ b/board/grinn/liteboard/Kconfig
@@ -0,0 +1,12 @@
+if TARGET_LITEBOARD
+
+config SYS_BOARD
+	default "liteboard"
+
+config SYS_VENDOR
+	default "grinn"
+
+config SYS_CONFIG_NAME
+	default "liteboard"
+
+endif
diff --git a/board/grinn/liteboard/MAINTAINERS b/board/grinn/liteboard/MAINTAINERS
new file mode 100644
index 0000000..b4474f1
--- /dev/null
+++ b/board/grinn/liteboard/MAINTAINERS
@@ -0,0 +1,6 @@
+LITEBOARD
+M:	Marcin Niestroj <m.niestroj@grinn-global.com>
+S:	Maintained
+F:	board/grinn/liteboard/
+F:	include/configs/liteboard.h
+F:	configs/liteboard_defconfig
diff --git a/board/grinn/liteboard/Makefile b/board/grinn/liteboard/Makefile
new file mode 100644
index 0000000..e2492d6
--- /dev/null
+++ b/board/grinn/liteboard/Makefile
@@ -0,0 +1,6 @@
+# (C) Copyright 2016 Grinn
+#
+# SPDX-License-Identifier:	GPL-2.0+
+#
+
+obj-y  := board.o
diff --git a/board/grinn/liteboard/README b/board/grinn/liteboard/README
new file mode 100644
index 0000000..bee0394
--- /dev/null
+++ b/board/grinn/liteboard/README
@@ -0,0 +1,31 @@
+How to use U-Boot on Grinn's liteBoard
+--------------------------------------
+
+- Build U-Boot for liteBoard:
+
+$ make mrproper
+$ make liteboard_defconfig
+$ make
+
+This will generate the SPL image called SPL and the u-boot.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.img image into the micro SD card:
+
+sudo dd if=u-boot.img of=/dev/mmcblk0 bs=1k seek=69; sync
+
+- Jumper settings:
+
+S1: 0 1 0 1 1 1
+
+where 0 means bottom position and 1 means top position (from the
+switch label numbers reference).
+
+- Insert the micro SD card in the board.
+
+- Connect USB cable between liteBoard and the PC for the power and console.
+
+- U-Boot messages should come up.
diff --git a/board/grinn/liteboard/board.c b/board/grinn/liteboard/board.c
new file mode 100644
index 0000000..13dd0a6
--- /dev/null
+++ b/board/grinn/liteboard/board.c
@@ -0,0 +1,287 @@
+/*
+ * Copyright (C) 2015-2016 Freescale Semiconductor, Inc.
+ * Copyright (C) 2016 Grinn
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include <asm/arch/clock.h>
+#include <asm/arch/iomux.h>
+#include <asm/arch/imx-regs.h>
+#include <asm/arch/crm_regs.h>
+#include <asm/arch/mx6ul_pins.h>
+#include <asm/arch/mx6-pins.h>
+#include <asm/arch/sys_proto.h>
+#include <asm/gpio.h>
+#include <asm/imx-common/iomux-v3.h>
+#include <asm/imx-common/boot_mode.h>
+#include <asm/io.h>
+#include <common.h>
+#include <fsl_esdhc.h>
+#include <linux/sizes.h>
+#include <linux/fb.h>
+#include <mach/litesom.h>
+#include <miiphy.h>
+#include <mmc.h>
+#include <netdev.h>
+#include <spl.h>
+#include <usb.h>
+#include <usb/ehci-ci.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)
+
+#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 ENET_PAD_CTRL  (PAD_CTL_PUS_100K_UP | PAD_CTL_PUE |     \
+	PAD_CTL_SPEED_HIGH   |                                   \
+	PAD_CTL_DSE_48ohm   | PAD_CTL_SRE_FAST)
+
+#define MDIO_PAD_CTRL  (PAD_CTL_PUS_100K_UP | PAD_CTL_PUE |     \
+	PAD_CTL_DSE_48ohm   | PAD_CTL_SRE_FAST | PAD_CTL_ODE)
+
+#define ENET_CLK_PAD_CTRL  (PAD_CTL_DSE_40ohm   | PAD_CTL_SRE_FAST)
+
+static iomux_v3_cfg_t const uart1_pads[] = {
+	MX6_PAD_UART1_TX_DATA__UART1_DCE_TX | MUX_PAD_CTRL(UART_PAD_CTRL),
+	MX6_PAD_UART1_RX_DATA__UART1_DCE_RX | MUX_PAD_CTRL(UART_PAD_CTRL),
+};
+
+static iomux_v3_cfg_t const sd_pads[] = {
+	MX6_PAD_SD1_CLK__USDHC1_CLK | MUX_PAD_CTRL(USDHC_PAD_CTRL),
+	MX6_PAD_SD1_CMD__USDHC1_CMD | MUX_PAD_CTRL(USDHC_PAD_CTRL),
+	MX6_PAD_SD1_DATA0__USDHC1_DATA0 | MUX_PAD_CTRL(USDHC_PAD_CTRL),
+	MX6_PAD_SD1_DATA1__USDHC1_DATA1 | MUX_PAD_CTRL(USDHC_PAD_CTRL),
+	MX6_PAD_SD1_DATA2__USDHC1_DATA2 | MUX_PAD_CTRL(USDHC_PAD_CTRL),
+	MX6_PAD_SD1_DATA3__USDHC1_DATA3 | MUX_PAD_CTRL(USDHC_PAD_CTRL),
+
+	/* CD */
+	MX6_PAD_UART1_RTS_B__GPIO1_IO19 | MUX_PAD_CTRL(NO_PAD_CTRL),
+};
+
+#ifdef CONFIG_FEC_MXC
+static iomux_v3_cfg_t const fec1_pads[] = {
+	MX6_PAD_GPIO1_IO06__ENET1_MDIO | MUX_PAD_CTRL(MDIO_PAD_CTRL),
+	MX6_PAD_GPIO1_IO07__ENET1_MDC | MUX_PAD_CTRL(ENET_PAD_CTRL),
+	MX6_PAD_ENET1_TX_DATA0__ENET1_TDATA00 | MUX_PAD_CTRL(ENET_PAD_CTRL),
+	MX6_PAD_ENET1_TX_DATA1__ENET1_TDATA01 | MUX_PAD_CTRL(ENET_PAD_CTRL),
+	MX6_PAD_ENET1_TX_EN__ENET1_TX_EN | MUX_PAD_CTRL(ENET_PAD_CTRL),
+	MX6_PAD_ENET1_TX_CLK__ENET1_REF_CLK1 | MUX_PAD_CTRL(ENET_CLK_PAD_CTRL),
+	MX6_PAD_ENET1_RX_DATA0__ENET1_RDATA00 | MUX_PAD_CTRL(ENET_PAD_CTRL),
+	MX6_PAD_ENET1_RX_DATA1__ENET1_RDATA01 | MUX_PAD_CTRL(ENET_PAD_CTRL),
+	MX6_PAD_ENET1_RX_ER__ENET1_RX_ER | MUX_PAD_CTRL(ENET_PAD_CTRL),
+	MX6_PAD_ENET1_RX_EN__ENET1_RX_EN | MUX_PAD_CTRL(ENET_PAD_CTRL),
+};
+
+static void setup_iomux_fec(void)
+{
+	imx_iomux_v3_setup_multiple_pads(fec1_pads, ARRAY_SIZE(fec1_pads));
+}
+#endif
+
+static void setup_iomux_uart(void)
+{
+	imx_iomux_v3_setup_multiple_pads(uart1_pads, ARRAY_SIZE(uart1_pads));
+}
+
+#ifdef CONFIG_FSL_ESDHC
+static struct fsl_esdhc_cfg sd_cfg = {USDHC1_BASE_ADDR, 0, 4};
+
+#define SD_CD_GPIO	IMX_GPIO_NR(1, 19)
+
+static int mmc_get_env_devno(void)
+{
+	u32 soc_sbmr = readl(SRC_BASE_ADDR + 0x4);
+	int dev_no;
+	u32 bootsel;
+
+	bootsel = (soc_sbmr & 0x000000FF) >> 6;
+
+	/* If not boot from sd/mmc, use default value */
+	if (bootsel != 1)
+		return CONFIG_SYS_MMC_ENV_DEV;
+
+	/* BOOT_CFG2[3] and BOOT_CFG2[4] */
+	dev_no = (soc_sbmr & 0x00001800) >> 11;
+
+	return dev_no;
+}
+
+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 = !gpio_get_value(SD_CD_GPIO);
+		break;
+	case USDHC2_BASE_ADDR:
+		ret = 1;
+		break;
+	}
+
+	return ret;
+}
+
+int board_mmc_init(bd_t *bis)
+{
+	int ret;
+
+	/* SD */
+	imx_iomux_v3_setup_multiple_pads(sd_pads, ARRAY_SIZE(sd_pads));
+	gpio_direction_input(SD_CD_GPIO);
+	sd_cfg.sdhc_clk = mxc_get_clock(MXC_ESDHC_CLK);
+
+	ret = fsl_esdhc_initialize(bis, &sd_cfg);
+	if (ret) {
+		printf("Warning: failed to initialize mmc dev 0 (SD)\n");
+		return ret;
+	}
+
+	return litesom_mmc_init(bis);
+}
+
+static int check_mmc_autodetect(void)
+{
+	char *autodetect_str = getenv("mmcautodetect");
+
+	if ((autodetect_str != NULL) &&
+	    (strcmp(autodetect_str, "yes") == 0)) {
+		return 1;
+	}
+
+	return 0;
+}
+
+void board_late_mmc_init(void)
+{
+	char cmd[32];
+	char mmcblk[32];
+	u32 dev_no = mmc_get_env_devno();
+
+	if (!check_mmc_autodetect())
+		return;
+
+	setenv_ulong("mmcdev", dev_no);
+
+	/* Set mmcblk env */
+	sprintf(mmcblk, "/dev/mmcblk%dp2 rootwait rw",
+		dev_no);
+	setenv("mmcroot", mmcblk);
+
+	sprintf(cmd, "mmc dev %d", dev_no);
+	run_command(cmd, 0);
+}
+#endif
+
+#ifdef CONFIG_FEC_MXC
+int board_eth_init(bd_t *bis)
+{
+	setup_iomux_fec();
+
+	return fecmxc_initialize(bis);
+}
+
+static int setup_fec(void)
+{
+	struct iomuxc *const iomuxc_regs = (struct iomuxc *)IOMUXC_BASE_ADDR;
+	int ret;
+
+	/* Use 50M anatop loopback REF_CLK1 for ENET1, clear gpr1[13],
+	   set gpr1[17]*/
+	clrsetbits_le32(&iomuxc_regs->gpr[1], IOMUX_GPR1_FEC1_MASK,
+			IOMUX_GPR1_FEC1_CLOCK_MUX1_SEL_MASK);
+
+	ret = enable_fec_anatop_clock(0, ENET_50MHZ);
+	if (ret)
+		return ret;
+
+	enable_enet_clk(1);
+
+	return 0;
+}
+#endif
+
+#ifdef CONFIG_USB_EHCI_MX6
+int board_usb_phy_mode(int port)
+{
+	return USB_INIT_HOST;
+}
+#endif
+
+int board_early_init_f(void)
+{
+	setup_iomux_uart();
+
+	return 0;
+}
+
+int board_init(void)
+{
+	/* Address of boot parameters */
+	gd->bd->bi_boot_params = PHYS_SDRAM + 0x100;
+
+#ifdef	CONFIG_FEC_MXC
+	setup_fec();
+#endif
+
+	return 0;
+}
+
+#ifdef CONFIG_CMD_BMODE
+static const struct boot_mode board_boot_modes[] = {
+	/* 4 bit bus width */
+	{"sd",   MAKE_CFGVAL(0x40, 0x20, 0x00, 0x00)},
+	{"emmc", MAKE_CFGVAL(0x60, 0x48, 0x00, 0x00)},
+	{NULL,	 0},
+};
+#endif
+
+int board_late_init(void)
+{
+#ifdef CONFIG_CMD_BMODE
+	add_board_boot_modes(board_boot_modes);
+#endif
+
+#ifdef CONFIG_ENV_IS_IN_MMC
+	board_late_mmc_init();
+#endif
+
+	return 0;
+}
+
+int checkboard(void)
+{
+	puts("Board: Grinn liteBoard\n");
+
+	return 0;
+}
+
+#ifdef CONFIG_SPL_BUILD
+void board_boot_order(u32 *spl_boot_list)
+{
+	struct src *psrc = (struct src *)SRC_BASE_ADDR;
+	unsigned gpr10_boot = readl(&psrc->gpr10) & (1 << 28);
+	unsigned reg = gpr10_boot ? readl(&psrc->gpr9) : readl(&psrc->sbmr1);
+	unsigned port = (reg >> 11) & 0x1;
+
+	if (port == 0) {
+		spl_boot_list[0] = BOOT_DEVICE_MMC1;
+		spl_boot_list[1] = BOOT_DEVICE_MMC2;
+	} else {
+		spl_boot_list[0] = BOOT_DEVICE_MMC2;
+		spl_boot_list[1] = BOOT_DEVICE_MMC1;
+	}
+}
+
+void board_init_f(ulong dummy)
+{
+	litesom_init_f();
+}
+#endif