arm: imx7d: add support for Compulab cl-som-imx7

Add initial support for Compulab cl-som-imx7 SoM.
The initial support includes:
 - MMC
 - eMMC
 - SPI flash
 - I2C
 - FEC
 - USB
 - Serial console

Signed-off-by: Ilya Ledvich <ilya@compulab.co.il>

1 files changed, 331 insertions, 0 deletions

diff --git a/board/compulab/cl-som-imx7/cl-som-imx7.c b/board/compulab/cl-som-imx7/cl-som-imx7.c
new file mode 100644
index 0000000000..f8b1cda5bb
--- /dev/null
+++ b/board/compulab/cl-som-imx7/cl-som-imx7.c
@@ -0,0 +1,331 @@
+/*
+ * U-Boot board functions for CompuLab CL-SOM-iMX7 module
+ *
+ * (C) Copyright 2017 CompuLab, Ltd. http://www.compulab.com
+ *
+ * Author: Uri Mashiach <uri.mashiach@compulab.co.il>
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include <common.h>
+#include <mmc.h>
+#include <phy.h>
+#include <netdev.h>
+#include <fsl_esdhc.h>
+#include <power/pmic.h>
+#include <power/pfuze3000_pmic.h>
+#include <asm/mach-imx/mxc_i2c.h>
+#include <asm/mach-imx/iomux-v3.h>
+#include <asm/arch-mx7/mx7-pins.h>
+#include <asm/arch-mx7/sys_proto.h>
+#include <asm/arch-mx7/clock.h>
+#include "../common/eeprom.h"
+#include "common.h"
+
+DECLARE_GLOBAL_DATA_PTR;
+
+#ifdef CONFIG_SYS_I2C_MXC
+
+#define I2C_PAD_CTRL		(PAD_CTL_DSE_3P3V_32OHM | PAD_CTL_SRE_SLOW | \
+				PAD_CTL_HYS)
+
+#define CL_SOM_IMX7_GPIO_I2C2_SCL	IMX_GPIO_NR(1, 6)
+#define CL_SOM_IMX7_GPIO_I2C2_SDA	IMX_GPIO_NR(1, 7)
+
+static struct i2c_pads_info cl_som_imx7_i2c_pad_info2 = {
+	.scl = {
+		.i2c_mode = MX7D_PAD_GPIO1_IO06__I2C2_SCL |
+			MUX_PAD_CTRL(I2C_PAD_CTRL),
+		.gpio_mode = MX7D_PAD_GPIO1_IO06__GPIO1_IO6 |
+			MUX_PAD_CTRL(I2C_PAD_CTRL),
+		.gp = CL_SOM_IMX7_GPIO_I2C2_SCL,
+	},
+	.sda = {
+		.i2c_mode = MX7D_PAD_GPIO1_IO07__I2C2_SDA |
+			MUX_PAD_CTRL(I2C_PAD_CTRL),
+		.gpio_mode = MX7D_PAD_GPIO1_IO07__GPIO1_IO7 |
+			MUX_PAD_CTRL(I2C_PAD_CTRL),
+		.gp = CL_SOM_IMX7_GPIO_I2C2_SDA,
+	},
+};
+
+/*
+ * cl_som_imx7_setup_i2c() - I2C  pinmux configuration.
+ */
+static void cl_som_imx7_setup_i2c(void)
+{
+	setup_i2c(0, CONFIG_SYS_I2C_SPEED, 0x7f, &cl_som_imx7_i2c_pad_info2);
+}
+#else /* !CONFIG_SYS_I2C_MXC */
+static void cl_som_imx7_setup_i2c(void) {}
+#endif /* CONFIG_SYS_I2C_MXC */
+
+int dram_init(void)
+{
+	gd->ram_size = imx_ddr_size();
+
+	return 0;
+}
+
+#ifdef CONFIG_FSL_ESDHC
+
+#define CL_SOM_IMX7_GPIO_USDHC3_PWR	IMX_GPIO_NR(6, 11)
+
+static struct fsl_esdhc_cfg cl_som_imx7_usdhc_cfg[3] = {
+	{USDHC1_BASE_ADDR, 0, 4},
+	{USDHC3_BASE_ADDR},
+};
+
+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                    USDHC1
+	 * mmc2                    USDHC3 (eMMC)
+	 */
+	for (i = 0; i < CONFIG_SYS_FSL_USDHC_NUM; i++) {
+		switch (i) {
+		case 0:
+			cl_som_imx7_usdhc1_pads_set();
+			gpio_request(CL_SOM_IMX7_GPIO_USDHC1_CD, "usdhc1_cd");
+			cl_som_imx7_usdhc_cfg[0].sdhc_clk =
+				mxc_get_clock(MXC_ESDHC_CLK);
+			break;
+		case 1:
+			cl_som_imx7_usdhc3_emmc_pads_set();
+			gpio_request(CL_SOM_IMX7_GPIO_USDHC3_PWR, "usdhc3_pwr");
+			gpio_direction_output(CL_SOM_IMX7_GPIO_USDHC3_PWR, 0);
+			udelay(500);
+			gpio_direction_output(CL_SOM_IMX7_GPIO_USDHC3_PWR, 1);
+			cl_som_imx7_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, &cl_som_imx7_usdhc_cfg[i]);
+		if (ret)
+			return ret;
+	}
+
+	return 0;
+}
+#endif /* CONFIG_FSL_ESDHC */
+
+#ifdef CONFIG_FEC_MXC
+
+#define CL_SOM_IMX7_ETH1_PHY_NRST	IMX_GPIO_NR(1, 4)
+
+/*
+ * cl_som_imx7_rgmii_rework() - Ethernet PHY configuration.
+ */
+static void cl_som_imx7_rgmii_rework(struct phy_device *phydev)
+{
+	unsigned short val;
+
+	/* Ar8031 phy SmartEEE feature cause link status generates glitch,
+	 * which cause ethernet link down/up issue, so disable SmartEEE
+	 */
+	phy_write(phydev, MDIO_DEVAD_NONE, 0xd, 0x3);
+	phy_write(phydev, MDIO_DEVAD_NONE, 0xe, 0x805d);
+	phy_write(phydev, MDIO_DEVAD_NONE, 0xd, 0x4003);
+	val = phy_read(phydev, MDIO_DEVAD_NONE, 0xe);
+	val &= ~(0x1 << 8);
+	phy_write(phydev, MDIO_DEVAD_NONE, 0xe, val);
+
+	/* To enable AR8031 ouput a 125MHz clk from CLK_25M */
+	phy_write(phydev, MDIO_DEVAD_NONE, 0xd, 0x7);
+	phy_write(phydev, MDIO_DEVAD_NONE, 0xe, 0x8016);
+	phy_write(phydev, MDIO_DEVAD_NONE, 0xd, 0x4007);
+
+	val = phy_read(phydev, MDIO_DEVAD_NONE, 0xe);
+	val &= 0xffe3;
+	val |= 0x18;
+	phy_write(phydev, MDIO_DEVAD_NONE, 0xe, val);
+
+	/* introduce tx clock delay */
+	phy_write(phydev, MDIO_DEVAD_NONE, 0x1d, 0x5);
+	val = phy_read(phydev, MDIO_DEVAD_NONE, 0x1e);
+	val |= 0x0100;
+	phy_write(phydev, MDIO_DEVAD_NONE, 0x1e, val);
+}
+
+int board_phy_config(struct phy_device *phydev)
+{
+	cl_som_imx7_rgmii_rework(phydev);
+
+	if (phydev->drv->config)
+		phydev->drv->config(phydev);
+
+	return 0;
+}
+
+/*
+ * cl_som_imx7_handle_mac_address() - set Ethernet MAC address environment.
+ *
+ * @env_var: MAC address environment variable
+ * @eeprom_bus: I2C bus of the environment EEPROM
+ *
+ * @return: 0 on success, < 0 on failure
+ */
+static int cl_som_imx7_handle_mac_address(char *env_var, uint eeprom_bus)
+{
+	int ret;
+	unsigned char enetaddr[6];
+
+	ret = eth_env_get_enetaddr(env_var, enetaddr);
+	if (ret)
+		return 0;
+
+	ret = cl_eeprom_read_mac_addr(enetaddr, eeprom_bus);
+	if (ret)
+		return ret;
+
+	ret = is_valid_ethaddr(enetaddr);
+	if (!ret)
+		return -1;
+
+	return eth_env_set_enetaddr(env_var, enetaddr);
+}
+
+#define CL_SOM_IMX7_FEC_DEV_ID_PRI 0
+
+int board_eth_init(bd_t *bis)
+{
+	/* set Ethernet MAC address environment */
+	cl_som_imx7_handle_mac_address("ethaddr", CONFIG_SYS_I2C_EEPROM_BUS);
+	/* Ethernet interface pinmux configuration  */
+	cl_som_imx7_phy1_rst_pads_set();
+	cl_som_imx7_fec1_pads_set();
+	/* PHY reset */
+	gpio_request(CL_SOM_IMX7_ETH1_PHY_NRST, "eth1_phy_nrst");
+	gpio_direction_output(CL_SOM_IMX7_ETH1_PHY_NRST, 0);
+	mdelay(10);
+	gpio_set_value(CL_SOM_IMX7_ETH1_PHY_NRST, 1);
+	/* MAC initialization */
+	return fecmxc_initialize_multi(bis, CL_SOM_IMX7_FEC_DEV_ID_PRI,
+				       CONFIG_FEC_MXC_PHYADDR, IMX_FEC_BASE);
+}
+
+/*
+ * cl_som_imx7_setup_fec() - Ethernet MAC 1 clock configuration.
+ * - ENET1 reference clock mode select.
+ * - ENET1_TX_CLK output driver is disabled when configured for ALT1.
+ */
+static void cl_som_imx7_setup_fec(void)
+{
+	struct iomuxc_gpr_base_regs *const iomuxc_gpr_regs
+		= (struct iomuxc_gpr_base_regs *)IOMUXC_GPR_BASE_ADDR;
+
+	/* Use 125M anatop REF_CLK1 for ENET1, clear gpr1[13], gpr1[17]*/
+	clrsetbits_le32(&iomuxc_gpr_regs->gpr[1],
+			(IOMUXC_GPR_GPR1_GPR_ENET1_TX_CLK_SEL_MASK |
+			 IOMUXC_GPR_GPR1_GPR_ENET1_CLK_DIR_MASK), 0);
+
+	set_clk_enet(ENET_125MHZ);
+}
+#else /* !CONFIG_FEC_MXC */
+static void cl_som_imx7_setup_fec(void) {}
+#endif /* CONFIG_FEC_MXC */
+
+#ifdef CONFIG_SPI
+
+static void cl_som_imx7_spi_init(void)
+{
+	cl_som_imx7_espi1_pads_set();
+}
+#else /* !CONFIG_SPI */
+static void cl_som_imx7_spi_init(void) {}
+#endif /* CONFIG_SPI */
+
+int board_early_init_f(void)
+{
+	cl_som_imx7_uart1_pads_set();
+	cl_som_imx7_usb_otg1_pads_set();
+
+	return 0;
+}
+
+int board_init(void)
+{
+	/* address of boot parameters */
+	gd->bd->bi_boot_params = PHYS_SDRAM + 0x100;
+	cl_som_imx7_setup_i2c();
+	cl_som_imx7_setup_fec();
+	cl_som_imx7_spi_init();
+
+	return 0;
+}
+
+#ifdef CONFIG_POWER
+#define I2C_PMIC	0
+int power_init_board(void)
+{
+	struct pmic *p;
+	int ret;
+	unsigned int reg, rev_id;
+
+	ret = power_pfuze3000_init(I2C_PMIC);
+	if (ret)
+		return ret;
+
+	p = pmic_get("PFUZE3000");
+	ret = pmic_probe(p);
+	if (ret)
+		return ret;
+
+	pmic_reg_read(p, PFUZE3000_DEVICEID, &reg);
+	pmic_reg_read(p, PFUZE3000_REVID, &rev_id);
+	printf("PMIC: PFUZE3000 DEV_ID=0x%x REV_ID=0x%x\n", reg, rev_id);
+
+	/* disable Low Power Mode during standby mode */
+	pmic_reg_write(p, PFUZE3000_LDOGCTL, 0x1);
+
+	return 0;
+}
+#endif /* CONFIG_POWER */
+
+/*
+ * cl_som_imx7_setup_wdog() - watchdog configuration.
+ * - Output WDOG_B signal to reset external pmic.
+ * - Suspend the watchdog timer during low-power modes.
+ */
+void cl_som_imx7_setup_wdog(void)
+{
+	struct wdog_regs *wdog = (struct wdog_regs *)WDOG1_BASE_ADDR;
+
+	cl_som_imx7_wdog_pads_set();
+	set_wdog_reset(wdog);
+       /*
+	* Do not assert internal WDOG_RESET_B_DEB(controlled by bit 4),
+	* since we use PMIC_PWRON to reset the board.
+	*/
+	clrsetbits_le16(&wdog->wcr, 0, 0x10);
+}
+
+int board_late_init(void)
+{
+	env_set("board_name", "CL-SOM-iMX7");
+	cl_som_imx7_setup_wdog();
+	return 0;
+}
+
+int checkboard(void)
+{
+	char *mode;
+
+	if (IS_ENABLED(CONFIG_ARMV7_BOOT_SEC_DEFAULT))
+		mode = "secure";
+	else
+		mode = "non-secure";
+
+	printf("Board: CL-SOM-iMX7 in %s mode\n", mode);
+
+	return 0;
+}