Initial commit of the Librem5 SPL source
Signed-off-by: Angus Ainslie angus@akkea.ca Co-developed-by: Sebastian Krzyszkowiak sebastian.krzyszkowiak@puri.sm Signed-off-by: Sebastian Krzyszkowiak sebastian.krzyszkowiak@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(); +} +