[PATCH 08/13] board: librem5: add the SPL source for the Librem5

Angus Ainslie angus at akkea.ca
Mon Jan 17 16:07:30 CET 2022


Initial commit of the Librem5 SPL source

Signed-off-by: Angus Ainslie <angus at akkea.ca>
Co-developed-by: Sebastian Krzyszkowiak <sebastian.krzyszkowiak at puri.sm>
Signed-off-by: Sebastian Krzyszkowiak <sebastian.krzyszkowiak at puri.sm>
---
 board/purism/librem5/spl.c | 481 +++++++++++++++++++++++++++++++++++++
 1 file changed, 481 insertions(+)
 create mode 100644 board/purism/librem5/spl.c

diff --git a/board/purism/librem5/spl.c b/board/purism/librem5/spl.c
new file mode 100644
index 0000000000..976033a6e5
--- /dev/null
+++ b/board/purism/librem5/spl.c
@@ -0,0 +1,481 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright 2018 NXP
+ * Copyright 2021 Purism
+ */
+
+#include <common.h>
+#include <asm/io.h>
+#include <errno.h>
+#include <asm/io.h>
+#include <asm/arch/ddr.h>
+#include <asm/arch/imx8mq_pins.h>
+#include <asm/arch/sys_proto.h>
+#include <asm/arch/clock.h>
+#include <asm/mach-imx/boot_mode.h>
+#include <asm/mach-imx/iomux-v3.h>
+#include <asm/mach-imx/gpio.h>
+#include <asm/mach-imx/mxc_i2c.h>
+#include <fsl_esdhc_imx.h>
+#include <mmc.h>
+#include <power/pmic.h>
+#include <power/bd71837.h>
+#include <hang.h>
+#include <init.h>
+#include <spl.h>
+#include <usb.h>
+#include <dwc3-uboot.h>
+#include <linux/delay.h>
+#include "librem5.h"
+
+DECLARE_GLOBAL_DATA_PTR;
+
+void spl_dram_init(void)
+{
+	/* ddr init */
+	if ((get_cpu_rev() & 0xfff) == CHIP_REV_2_1)
+		ddr_init(&dram_timing);
+	else
+		ddr_init(&dram_timing_b0);
+}
+
+int spl_board_boot_device(enum boot_device boot_dev_spl)
+{
+	log_debug("%s : starting\n", __func__);
+
+	switch (boot_dev_spl) {
+	case SD1_BOOT:
+	case MMC1_BOOT:
+		return BOOT_DEVICE_MMC1;
+	case USB_BOOT:
+		return BOOT_DEVICE_BOARD;
+	default:
+		return BOOT_DEVICE_NONE;
+	}
+}
+
+#define I2C_PAD_CTRL	(PAD_CTL_PUE | PAD_CTL_ODE | PAD_CTL_DSE7 | PAD_CTL_FSEL3)
+#define PC MUX_PAD_CTRL(I2C_PAD_CTRL)
+struct i2c_pads_info i2c_pad_info1 = {
+	.scl = {
+		.i2c_mode = IMX8MQ_PAD_I2C1_SCL__I2C1_SCL | PC,
+		.gpio_mode = IMX8MQ_PAD_I2C1_SCL__GPIO5_IO14 | PC,
+		.gp = IMX_GPIO_NR(5, 14),
+	},
+	.sda = {
+		.i2c_mode = IMX8MQ_PAD_I2C1_SDA__I2C1_SDA | PC,
+		.gpio_mode = IMX8MQ_PAD_I2C1_SDA__GPIO5_IO15 | PC,
+		.gp = IMX_GPIO_NR(5, 15),
+	},
+};
+
+struct i2c_pads_info i2c_pad_info2 = {
+	.scl = {
+		.i2c_mode = IMX8MQ_PAD_I2C2_SCL__I2C2_SCL | PC,
+		.gpio_mode = IMX8MQ_PAD_I2C2_SCL__GPIO5_IO16 | PC,
+		.gp = IMX_GPIO_NR(5, 16),
+	},
+	.sda = {
+		.i2c_mode = IMX8MQ_PAD_I2C2_SDA__I2C2_SDA | PC,
+		.gpio_mode = IMX8MQ_PAD_I2C2_SDA__GPIO5_IO17 | PC,
+		.gp = IMX_GPIO_NR(5, 17),
+	},
+};
+
+struct i2c_pads_info i2c_pad_info3 = {
+	.scl = {
+		.i2c_mode = IMX8MQ_PAD_I2C3_SCL__I2C3_SCL | PC,
+		.gpio_mode = IMX8MQ_PAD_I2C3_SCL__GPIO5_IO18 | PC,
+		.gp = IMX_GPIO_NR(5, 18),
+	},
+	.sda = {
+		.i2c_mode = IMX8MQ_PAD_I2C3_SDA__I2C3_SDA | PC,
+		.gpio_mode = IMX8MQ_PAD_I2C3_SDA__GPIO5_IO19 | PC,
+		.gp = IMX_GPIO_NR(5, 19),
+	},
+};
+
+struct i2c_pads_info i2c_pad_info4 = {
+	.scl = {
+		.i2c_mode = IMX8MQ_PAD_I2C4_SCL__I2C4_SCL | PC,
+		.gpio_mode = IMX8MQ_PAD_I2C4_SCL__GPIO5_IO20 | PC,
+		.gp = IMX_GPIO_NR(5, 20),
+	},
+	.sda = {
+		.i2c_mode = IMX8MQ_PAD_I2C4_SDA__I2C4_SDA | PC,
+		.gpio_mode = IMX8MQ_PAD_I2C4_SDA__GPIO5_IO21 | PC,
+		.gp = IMX_GPIO_NR(5, 21),
+	},
+};
+
+#define UART_PAD_CTRL	(PAD_CTL_DSE6 | PAD_CTL_FSEL1)
+
+static const iomux_v3_cfg_t uart_pads[] = {
+	IMX8MQ_PAD_UART1_RXD__UART1_RX | MUX_PAD_CTRL(UART_PAD_CTRL),
+	IMX8MQ_PAD_UART1_TXD__UART1_TX | MUX_PAD_CTRL(UART_PAD_CTRL),
+	IMX8MQ_PAD_UART2_RXD__UART2_RX | MUX_PAD_CTRL(UART_PAD_CTRL),
+	IMX8MQ_PAD_UART2_TXD__UART2_TX | MUX_PAD_CTRL(UART_PAD_CTRL),
+	IMX8MQ_PAD_UART3_RXD__UART3_RX | MUX_PAD_CTRL(UART_PAD_CTRL),
+	IMX8MQ_PAD_UART3_TXD__UART3_TX | MUX_PAD_CTRL(UART_PAD_CTRL),
+	IMX8MQ_PAD_ECSPI2_SCLK__UART4_RX | MUX_PAD_CTRL(UART_PAD_CTRL),
+	IMX8MQ_PAD_ECSPI2_MOSI__UART4_TX | MUX_PAD_CTRL(UART_PAD_CTRL),
+};
+
+#define USDHC1_PWR_GPIO IMX_GPIO_NR(2, 10)
+#define USDHC2_PWR_GPIO IMX_GPIO_NR(2, 19)
+
+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 = 1;
+		break;
+	case USDHC2_BASE_ADDR:
+		ret = 1;
+		break;
+	}
+
+	return ret;
+}
+
+#define USDHC_PAD_CTRL	(PAD_CTL_DSE6 | PAD_CTL_HYS | PAD_CTL_PUE | \
+			 PAD_CTL_FSEL1)
+#define USDHC_GPIO_PAD_CTRL (PAD_CTL_PUE | PAD_CTL_DSE1)
+
+static const iomux_v3_cfg_t usdhc1_pads[] = {
+	IMX8MQ_PAD_SD1_CLK__USDHC1_CLK | MUX_PAD_CTRL(USDHC_PAD_CTRL),
+	IMX8MQ_PAD_SD1_CMD__USDHC1_CMD | MUX_PAD_CTRL(USDHC_PAD_CTRL),
+	IMX8MQ_PAD_SD1_DATA0__USDHC1_DATA0 | MUX_PAD_CTRL(USDHC_PAD_CTRL),
+	IMX8MQ_PAD_SD1_DATA1__USDHC1_DATA1 | MUX_PAD_CTRL(USDHC_PAD_CTRL),
+	IMX8MQ_PAD_SD1_DATA2__USDHC1_DATA2 | MUX_PAD_CTRL(USDHC_PAD_CTRL),
+	IMX8MQ_PAD_SD1_DATA3__USDHC1_DATA3 | MUX_PAD_CTRL(USDHC_PAD_CTRL),
+	IMX8MQ_PAD_SD1_DATA4__USDHC1_DATA4 | MUX_PAD_CTRL(USDHC_PAD_CTRL),
+	IMX8MQ_PAD_SD1_DATA5__USDHC1_DATA5 | MUX_PAD_CTRL(USDHC_PAD_CTRL),
+	IMX8MQ_PAD_SD1_DATA6__USDHC1_DATA6 | MUX_PAD_CTRL(USDHC_PAD_CTRL),
+	IMX8MQ_PAD_SD1_DATA7__USDHC1_DATA7 | MUX_PAD_CTRL(USDHC_PAD_CTRL),
+	IMX8MQ_PAD_SD1_RESET_B__GPIO2_IO10 | MUX_PAD_CTRL(NO_PAD_CTRL),
+};
+
+static const iomux_v3_cfg_t usdhc2_pads[] = {
+	IMX8MQ_PAD_SD2_CLK__USDHC2_CLK | MUX_PAD_CTRL(USDHC_PAD_CTRL), /* 0xd6 */
+	IMX8MQ_PAD_SD2_CMD__USDHC2_CMD | MUX_PAD_CTRL(USDHC_PAD_CTRL), /* 0xd6 */
+	IMX8MQ_PAD_SD2_DATA0__USDHC2_DATA0 | MUX_PAD_CTRL(USDHC_PAD_CTRL), /* 0xd6 */
+	IMX8MQ_PAD_SD2_DATA1__USDHC2_DATA1 | MUX_PAD_CTRL(USDHC_PAD_CTRL), /* 0xd6 */
+	IMX8MQ_PAD_SD2_DATA2__USDHC2_DATA2 | MUX_PAD_CTRL(USDHC_PAD_CTRL), /* 0x16 */
+	IMX8MQ_PAD_SD2_DATA3__USDHC2_DATA3 | MUX_PAD_CTRL(USDHC_PAD_CTRL), /* 0xd6 */
+	IMX8MQ_PAD_SD2_RESET_B__GPIO2_IO19 | MUX_PAD_CTRL(USDHC_GPIO_PAD_CTRL),
+};
+
+static struct fsl_esdhc_cfg usdhc_cfg[2] = {
+	{USDHC1_BASE_ADDR, 0, 8},
+#ifndef CONFIG_SPL_BUILD
+	{USDHC2_BASE_ADDR, 0, 4},
+#endif
+};
+
+int board_mmc_init(struct bd_info *bis)
+{
+	int i, ret;
+	/*
+	 * According to the board_mmc_init() the following map is done:
+	 * (U-Boot device node)    (Physical Port)
+	 * mmc0                    USDHC1
+	 * mmc1                    USDHC2
+	 */
+	for (i = 0; i < CONFIG_SYS_FSL_USDHC_NUM; i++) {
+		log_debug("Initializing FSL USDHC port %d\n", i);
+		switch (i) {
+		case 0:
+			init_clk_usdhc(0);
+			usdhc_cfg[0].sdhc_clk = mxc_get_clock(USDHC1_CLK_ROOT);
+			imx_iomux_v3_setup_multiple_pads(usdhc1_pads,
+							 ARRAY_SIZE(usdhc1_pads));
+			gpio_request(USDHC1_PWR_GPIO, "usdhc1_reset");
+			gpio_direction_output(USDHC1_PWR_GPIO, 0);
+			udelay(500);
+			gpio_direction_output(USDHC1_PWR_GPIO, 1);
+			break;
+		case 1:
+			init_clk_usdhc(1);
+			usdhc_cfg[1].sdhc_clk = mxc_get_clock(USDHC2_CLK_ROOT);
+			imx_iomux_v3_setup_multiple_pads(usdhc2_pads,
+							 ARRAY_SIZE(usdhc2_pads));
+			gpio_request(USDHC2_PWR_GPIO, "usdhc2_reset");
+			gpio_direction_output(USDHC2_PWR_GPIO, 0);
+			udelay(500);
+			gpio_direction_output(USDHC2_PWR_GPIO, 1);
+			break;
+		default:
+			log_err("Warning: USDHC controller(%d) not supported\n", i + 1);
+			return -EINVAL;
+		}
+
+		ret = fsl_esdhc_initialize(bis, &usdhc_cfg[i]);
+		if (ret)
+			return ret;
+	}
+
+	return 0;
+}
+
+#define LDO_VOLT_EN                     BIT(6)
+
+/*
+ * Disable the charger - it will be re-enabled in u-boot
+ */
+void disable_charger_bq25896(void)
+{
+	u8 val;
+	int timeout = 1000; // ms
+
+	/* Set the i2c bus */
+	i2c_set_bus_num(3);
+
+	/* disable ship mode if BATFET_DLY is set */
+	val = i2c_reg_read(0x6a, 0x09);
+	log_debug("REG09 0x%x\n", val);
+	if (val & 0x28) {
+		val = val & ~0x28;
+		i2c_reg_write(0x6a, 0x09, val);
+	}
+
+	/* disable and trigger DPDM, ICO, HVDCP and MaxCharge */
+	val = i2c_reg_read(0x6a, 0x02);
+	log_debug("REG02 0x%x\n", val);
+	val &= 0xe0;
+	i2c_reg_write(0x6a, 0x02, val);
+
+	/* disable charger and enable BAT_LOADEN */
+	val = i2c_reg_read(0x6a, 0x03);
+	log_debug("REG03 0x%x\n", val);
+	val = (val | 0x80) & ~0x10;
+	i2c_reg_write(0x6a, 0x03, val);
+
+	mdelay(10);
+
+	/* force ADC conversions */
+	val = i2c_reg_read(0x6a, 0x02);
+	log_debug("REG02 0x%x\n", val);
+	val = (val | 0x80) & ~0x40;
+	i2c_reg_write(0x6a, 0x02, val);
+
+	do {
+		mdelay(10);
+		timeout -= 10;
+	} while ((i2c_reg_read(0x6a, 0x02) & 0x80) && (timeout > 0));
+
+	/* enable STAT pin */
+	val = i2c_reg_read(0x6a, 0x07);
+	log_debug("REG07 0x%x\n", val);
+	val = val & ~0x40;
+	i2c_reg_write(0x6a, 0x07, val);
+
+	/* check VBUS */
+	val = i2c_reg_read(0x6a, 0x11);
+	log_debug("VBUS good %d\n", (val >> 7) & 1);
+	log_debug("VBUS mV %d\n", (val & 0x7f) * 100 + 2600);
+
+	/* check VBAT */
+	val = i2c_reg_read(0x6a, 0x0e);
+	log_debug("VBAT mV %d\n", (val & 0x7f) * 20 + 2304);
+
+	/* limit the VINDPM to 3.9V  */
+	i2c_reg_write(0x6a, 0x0d, 0x8d);
+
+	/* set the max voltage to 4.192V */
+	val = i2c_reg_read(0x6a, 0x6);
+	val = (val & ~0xFC) | 0x16 << 2;
+	i2c_reg_write(0x6a, 0x6, val);
+
+	/* set the SYS_MIN to 3.7V */
+	val = i2c_reg_read(0x6a, 0x3);
+	val = val | 0xE;
+	i2c_reg_write(0x6a, 0x3, val);
+
+	/* disable BAT_LOADEN */
+	val = i2c_reg_read(0x6a, 0x03);
+	log_debug("REG03 0x%x\n", val);
+	val = val & ~0x80;
+	i2c_reg_write(0x6a, 0x03, val);
+}
+
+#define I2C_PMIC	0
+
+int power_bd71837_init(unsigned char bus)
+{
+	static const char name[] = BD718XX_REGULATOR_DRIVER;
+	struct pmic *p = pmic_alloc();
+
+	if (!p) {
+		log_err("%s: POWER allocation error!\n", __func__);
+		return -ENOMEM;
+	}
+
+	p->name = name;
+	p->interface = I2C_PMIC;
+	p->number_of_regs = BD718XX_MAX_REGISTER;
+	p->hw.i2c.addr = CONFIG_POWER_BD71837_I2C_ADDR;
+	p->hw.i2c.tx_num = 1;
+	p->bus = bus;
+
+	return 0;
+}
+
+int power_init_board(void)
+{
+	struct pmic *p;
+	int ldo[] = {BD718XX_LDO5_VOLT, BD718XX_LDO6_VOLT,
+		     BD71837_LDO7_VOLT};
+	u32 val;
+	int i, rv;
+
+	/* Set the i2c bus */
+	setup_i2c(0, CONFIG_SYS_I2C_SPEED, 0x7f, &i2c_pad_info1);
+
+	/*
+	 * Init PMIC
+	 */
+	rv = power_bd71837_init(CONFIG_POWER_BD71837_I2C_BUS);
+	if (rv) {
+		log_err("%s: power_bd71837_init(%d) error %d\n", __func__,
+			CONFIG_POWER_BD71837_I2C_BUS, rv);
+		goto out;
+	}
+
+	p = pmic_get(BD718XX_REGULATOR_DRIVER);
+	if (!p) {
+		log_err("%s: pmic_get(%s) failed\n", __func__, BD718XX_REGULATOR_DRIVER);
+		rv = -ENODEV;
+		goto out;
+	}
+
+	rv = pmic_probe(p);
+	if (rv) {
+		log_err("%s: pmic_probe() error %d\n", __func__, rv);
+		goto out;
+	}
+
+	/*
+	 * Unlock all regs
+	 */
+	pmic_reg_write(p, BD718XX_REGLOCK, 0);
+
+	/* find the reset cause */
+	pmic_reg_read(p, 0x29, &val);
+	log_debug("%s: reset cause %d\n", __func__, val);
+
+	/*
+	 * Reconfigure default voltages and disable:
+	 * - BUCK3: VDD_GPU_0V9 (1.00 -> 0.90)
+	 * - BUCK4: VDD_VPU_0V9 (1.00 -> 0.90)
+	 */
+	pmic_reg_write(p, BD71837_BUCK3_VOLT_RUN, 0x14);
+	pmic_reg_write(p, BD71837_BUCK4_VOLT_RUN, 0x14);
+
+	/*
+	 * Enable PHYs voltages: LDO5-7
+	 */
+	for (i = 0; i < ARRAY_SIZE(ldo); i++) {
+		rv = pmic_reg_read(p, ldo[i], &val);
+		if (rv) {
+			log_err("%s: pmic_read(%x) error %d\n", __func__,
+				ldo[i], rv);
+			continue;
+		}
+
+		pmic_reg_write(p, ldo[i], val | LDO_VOLT_EN);
+	}
+
+	udelay(500);
+
+	rv = 0;
+out:
+	return rv;
+}
+
+void spl_board_init(void)
+{
+	init_usb_clk();
+
+	if (is_usb_boot())
+		puts("USB Boot\n");
+	else
+		puts("Normal Boot\n");
+}
+
+void board_boot_order(u32 *spl_boot_list)
+{
+	if (is_usb_boot())
+		spl_boot_list[0] = BOOT_DEVICE_BOARD;
+	else
+		spl_boot_list[0] = BOOT_DEVICE_MMC1;
+}
+
+int board_fit_config_name_match(const char *name)
+{
+	/* Just empty function now - can't decide what to choose */
+	return 0;
+}
+
+void board_init_f(ulong dummy)
+{
+	int ret;
+
+	/* Clear global data */
+	memset((void *)gd, 0, sizeof(gd_t));
+
+	arch_cpu_init();
+
+	init_uart_clk(CONSOLE_UART_CLK);
+	imx_iomux_v3_setup_multiple_pads(uart_pads, ARRAY_SIZE(uart_pads));
+
+#ifdef CONSOLE_ON_UART4
+	gpio_request(WIFI_EN, "WIFI_EN");
+	gpio_direction_output(WIFI_EN, 1);
+#endif
+
+	board_early_init_f();
+
+	timer_init();
+
+	preloader_console_init();
+
+	/* Clear the BSS. */
+	memset(__bss_start, 0, __bss_end - __bss_start);
+
+	ret = spl_init();
+	if (ret) {
+		log_err("spl_init() failed: %d\n", ret);
+		hang();
+	}
+
+	enable_tzc380();
+
+	printf("Initializing pinmux\n");
+	init_pinmux();
+	gpio_direction_output(LED_G, 1);
+	gpio_direction_output(MOTO, 1);
+	mdelay(50);
+	gpio_direction_output(MOTO, 0);
+
+	/* Enable and configure i2c buses not used below */
+	setup_i2c(1, CONFIG_SYS_I2C_SPEED, 0x7f, &i2c_pad_info2);
+	setup_i2c(2, CONFIG_SYS_I2C_SPEED, 0x7f, &i2c_pad_info3);
+	setup_i2c(3, CONFIG_SYS_I2C_SPEED, 0x7f, &i2c_pad_info4);
+
+	power_init_board();
+
+	disable_charger_bq25896();
+
+	/* initialize this for M4 even if u-boot doesn't have SF_CMD */
+	printf("Initializing ECSPI\n");
+	board_ecspi_init();
+
+	/* DDR initialization */
+	printf("Initializing DRAM\n");
+	spl_dram_init();
+}
+
-- 
2.25.1



More information about the U-Boot mailing list