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- // SPDX-License-Identifier: GPL-2.0+
- /*
- * Copyright (c) 2020-2021 SiFive, Inc
- *
- * Authors:
- * Pragnesh Patel <pragnesh.patel@sifive.com>
- */
- #include <init.h>
- #include <spl.h>
- #include <misc.h>
- #include <log.h>
- #include <linux/delay.h>
- #include <linux/io.h>
- #include <asm/gpio.h>
- #include <asm/arch/gpio.h>
- #include <asm/arch/spl.h>
- #define UBRDG_RESET SIFIVE_GENERIC_GPIO_NR(0, 7)
- #define ULPI_RESET SIFIVE_GENERIC_GPIO_NR(0, 9)
- #define UHUB_RESET SIFIVE_GENERIC_GPIO_NR(0, 11)
- #define GEM_PHY_RESET SIFIVE_GENERIC_GPIO_NR(0, 12)
- #define MODE_SELECT_REG 0x1000
- #define MODE_SELECT_SD 0xb
- #define MODE_SELECT_MASK GENMASK(3, 0)
- static inline int spl_reset_device_by_gpio(const char *label, int pin, int low_width)
- {
- int ret;
- ret = gpio_request(pin, label);
- if (ret) {
- debug("%s gpio request failed: %d\n", label, ret);
- return ret;
- }
- ret = gpio_direction_output(pin, 1);
- if (ret) {
- debug("%s gpio direction set failed: %d\n", label, ret);
- return ret;
- }
- udelay(1);
- gpio_set_value(pin, 0);
- udelay(low_width);
- gpio_set_value(pin, 1);
- return ret;
- }
- static inline int spl_gemgxl_init(void)
- {
- int ret;
- /*
- * GEMGXL init VSC8541 PHY reset sequence;
- * leave pull-down active for 2ms
- */
- udelay(2000);
- ret = spl_reset_device_by_gpio("gem_phy_reset", GEM_PHY_RESET, 1);
- mdelay(15);
- return ret;
- }
- static inline int spl_usb_pcie_bridge_init(void)
- {
- return spl_reset_device_by_gpio("usb_pcie_bridge_reset", UBRDG_RESET, 3000);
- }
- static inline int spl_usb_hub_init(void)
- {
- return spl_reset_device_by_gpio("usb_hub_reset", UHUB_RESET, 100);
- }
- static inline int spl_ulpi_init(void)
- {
- return spl_reset_device_by_gpio("ulpi_reset", ULPI_RESET, 1);
- }
- int spl_board_init_f(void)
- {
- int ret;
- ret = spl_soc_init();
- if (ret) {
- debug("HiFive Unmatched FU740 SPL init failed: %d\n", ret);
- goto end;
- }
- ret = spl_gemgxl_init();
- if (ret) {
- debug("Gigabit ethernet PHY (VSC8541) init failed: %d\n", ret);
- goto end;
- }
- ret = spl_usb_pcie_bridge_init();
- if (ret) {
- debug("USB Bridge (ASM1042A) init failed: %d\n", ret);
- goto end;
- }
- ret = spl_usb_hub_init();
- if (ret) {
- debug("USB Hub (ASM1074) init failed: %d\n", ret);
- goto end;
- }
- ret = spl_ulpi_init();
- if (ret) {
- debug("USB 2.0 PHY (USB3320C) init failed: %d\n", ret);
- goto end;
- }
- end:
- return ret;
- }
- u32 spl_boot_device(void)
- {
- u32 mode_select = readl((void *)MODE_SELECT_REG);
- u32 boot_device = mode_select & MODE_SELECT_MASK;
- switch (boot_device) {
- case MODE_SELECT_SD:
- return BOOT_DEVICE_MMC1;
- default:
- debug("Unsupported boot device 0x%x but trying MMC1\n",
- boot_device);
- return BOOT_DEVICE_MMC1;
- }
- }
- #ifdef CONFIG_SPL_LOAD_FIT
- int board_fit_config_name_match(const char *name)
- {
- /* boot using first FIT config */
- return 0;
- }
- #endif
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