132 lines
2.9 KiB
C
132 lines
2.9 KiB
C
/*
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* Board init file for Dragonboard 410C
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*
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* (C) Copyright 2015 Mateusz Kulikowski <mateusz.kulikowski@gmail.com>
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*
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* SPDX-License-Identifier: GPL-2.0+
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*/
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#include <common.h>
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#include <dm.h>
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#include <usb.h>
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#include <asm/gpio.h>
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DECLARE_GLOBAL_DATA_PTR;
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int dram_init(void)
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{
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gd->ram_size = PHYS_SDRAM_1_SIZE;
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return 0;
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}
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void dram_init_banksize(void)
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{
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gd->bd->bi_dram[0].start = PHYS_SDRAM_1;
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gd->bd->bi_dram[0].size = PHYS_SDRAM_1_SIZE;
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}
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int board_prepare_usb(enum usb_init_type type)
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{
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static struct udevice *pmic_gpio;
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static struct gpio_desc hub_reset, usb_sel;
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int ret = 0, node;
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if (!pmic_gpio) {
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ret = uclass_get_device_by_name(UCLASS_GPIO,
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"pm8916_gpios@c000",
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&pmic_gpio);
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if (ret < 0) {
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printf("Failed to find pm8916_gpios@c000 node.\n");
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return ret;
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}
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}
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/* Try to request gpios needed to start usb host on dragonboard */
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if (!dm_gpio_is_valid(&hub_reset)) {
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node = fdt_subnode_offset(gd->fdt_blob, pmic_gpio->of_offset,
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"usb_hub_reset_pm");
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if (node < 0) {
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printf("Failed to find usb_hub_reset_pm dt node.\n");
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return node;
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}
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ret = gpio_request_by_name_nodev(gd->fdt_blob, node, "gpios", 0,
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&hub_reset, 0);
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if (ret < 0) {
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printf("Failed to request usb_hub_reset_pm gpio.\n");
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return ret;
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}
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}
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if (!dm_gpio_is_valid(&usb_sel)) {
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node = fdt_subnode_offset(gd->fdt_blob, pmic_gpio->of_offset,
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"usb_sw_sel_pm");
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if (node < 0) {
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printf("Failed to find usb_sw_sel_pm dt node.\n");
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return 0;
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}
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ret = gpio_request_by_name_nodev(gd->fdt_blob, node, "gpios", 0,
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&usb_sel, 0);
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if (ret < 0) {
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printf("Failed to request usb_sw_sel_pm gpio.\n");
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return ret;
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}
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}
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if (type == USB_INIT_HOST) {
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/* Start USB Hub */
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dm_gpio_set_dir_flags(&hub_reset,
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GPIOD_IS_OUT | GPIOD_IS_OUT_ACTIVE);
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mdelay(100);
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/* Switch usb to host connectors */
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dm_gpio_set_dir_flags(&usb_sel,
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GPIOD_IS_OUT | GPIOD_IS_OUT_ACTIVE);
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mdelay(100);
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} else { /* Device */
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/* Disable hub */
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dm_gpio_set_dir_flags(&hub_reset, GPIOD_IS_OUT);
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/* Switch back to device connector */
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dm_gpio_set_dir_flags(&usb_sel, GPIOD_IS_OUT);
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}
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return 0;
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}
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int board_init(void)
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{
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return 0;
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}
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/* Check for vol- button - if pressed - stop autoboot */
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int misc_init_r(void)
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{
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struct udevice *pon;
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struct gpio_desc resin;
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int node, ret;
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ret = uclass_get_device_by_name(UCLASS_GPIO, "pm8916_pon@800", &pon);
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if (ret < 0) {
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printf("Failed to find PMIC pon node. Check device tree\n");
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return 0;
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}
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node = fdt_subnode_offset(gd->fdt_blob, pon->of_offset, "key_vol_down");
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if (node < 0) {
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printf("Failed to find key_vol_down node. Check device tree\n");
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return 0;
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}
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if (gpio_request_by_name_nodev(gd->fdt_blob, node, "gpios", 0, &resin,
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0)) {
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printf("Failed to request key_vol_down button.\n");
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return 0;
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}
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if (dm_gpio_get_value(&resin)) {
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setenv("bootdelay", "-1");
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printf("Power button pressed - dropping to console.\n");
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}
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return 0;
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}
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