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https://github.com/AsahiLinux/u-boot
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219cb17311
Ensure USB hub, PCIe-USB bridge, and ULPI device to be reset even if the rebooting is without power-cycling. Signed-off-by: Vincent Chen <vincent.chen@sifive.com> Reviewed-by: Leo Yu-Chi Liang <ycliang@andestech.com>
141 lines
2.7 KiB
C
141 lines
2.7 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Copyright (c) 2020-2021 SiFive, Inc
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*
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* Authors:
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* Pragnesh Patel <pragnesh.patel@sifive.com>
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*/
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#include <init.h>
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#include <spl.h>
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#include <misc.h>
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#include <log.h>
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#include <linux/delay.h>
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#include <linux/io.h>
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#include <asm/gpio.h>
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#include <asm/arch/gpio.h>
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#include <asm/arch/spl.h>
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#define UBRDG_RESET SIFIVE_GENERIC_GPIO_NR(0, 7)
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#define ULPI_RESET SIFIVE_GENERIC_GPIO_NR(0, 9)
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#define UHUB_RESET SIFIVE_GENERIC_GPIO_NR(0, 11)
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#define GEM_PHY_RESET SIFIVE_GENERIC_GPIO_NR(0, 12)
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#define MODE_SELECT_REG 0x1000
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#define MODE_SELECT_SD 0xb
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#define MODE_SELECT_MASK GENMASK(3, 0)
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static inline int spl_reset_device_by_gpio(const char *label, int pin, int low_width)
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{
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int ret;
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ret = gpio_request(pin, label);
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if (ret) {
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debug("%s gpio request failed: %d\n", label, ret);
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return ret;
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}
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ret = gpio_direction_output(pin, 1);
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if (ret) {
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debug("%s gpio direction set failed: %d\n", label, ret);
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return ret;
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}
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udelay(1);
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gpio_set_value(pin, 0);
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udelay(low_width);
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gpio_set_value(pin, 1);
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return ret;
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}
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static inline int spl_gemgxl_init(void)
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{
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int ret;
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/*
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* GEMGXL init VSC8541 PHY reset sequence;
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* leave pull-down active for 2ms
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*/
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udelay(2000);
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ret = spl_reset_device_by_gpio("gem_phy_reset", GEM_PHY_RESET, 1);
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mdelay(15);
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return ret;
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}
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static inline int spl_usb_pcie_bridge_init(void)
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{
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return spl_reset_device_by_gpio("usb_pcie_bridge_reset", UBRDG_RESET, 3000);
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}
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static inline int spl_usb_hub_init(void)
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{
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return spl_reset_device_by_gpio("usb_hub_reset", UHUB_RESET, 100);
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}
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static inline int spl_ulpi_init(void)
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{
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return spl_reset_device_by_gpio("ulpi_reset", ULPI_RESET, 1);
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}
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int spl_board_init_f(void)
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{
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int ret;
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ret = spl_soc_init();
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if (ret) {
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debug("HiFive Unmatched FU740 SPL init failed: %d\n", ret);
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goto end;
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}
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ret = spl_gemgxl_init();
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if (ret) {
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debug("Gigabit ethernet PHY (VSC8541) init failed: %d\n", ret);
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goto end;
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}
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ret = spl_usb_pcie_bridge_init();
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if (ret) {
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debug("USB Bridge (ASM1042A) init failed: %d\n", ret);
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goto end;
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}
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ret = spl_usb_hub_init();
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if (ret) {
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debug("USB Hub (ASM1074) init failed: %d\n", ret);
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goto end;
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}
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ret = spl_ulpi_init();
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if (ret) {
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debug("USB 2.0 PHY (USB3320C) init failed: %d\n", ret);
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goto end;
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}
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end:
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return ret;
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}
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u32 spl_boot_device(void)
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{
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u32 mode_select = readl((void *)MODE_SELECT_REG);
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u32 boot_device = mode_select & MODE_SELECT_MASK;
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switch (boot_device) {
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case MODE_SELECT_SD:
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return BOOT_DEVICE_MMC1;
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default:
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debug("Unsupported boot device 0x%x but trying MMC1\n",
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boot_device);
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return BOOT_DEVICE_MMC1;
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}
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}
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#ifdef CONFIG_SPL_LOAD_FIT
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int board_fit_config_name_match(const char *name)
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{
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/* boot using first FIT config */
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return 0;
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}
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#endif
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