mirror of
https://github.com/brain-hackers/u-boot-brain
synced 2024-08-20 00:48:52 +09:00
![Jorge Ramirez-Ortiz](/assets/img/avatar_default.png)
The firmware that runs before u-boot modifies u-boot's device tree adding the local-mac-address and local-bd-address properties for the compatibles "qcom,wcnss-bt" and "qcom,wcnss-wlan". This commit reads that firmware, retrieves the properties and fixups the device tree that is passed to the kernel before booting. Signed-off-by: Jorge Ramirez-Ortiz <jorge.ramirez-ortiz@linaro.org>
174 lines
3.9 KiB
C
174 lines
3.9 KiB
C
/*
|
|
* Board init file for Dragonboard 410C
|
|
*
|
|
* (C) Copyright 2015 Mateusz Kulikowski <mateusz.kulikowski@gmail.com>
|
|
*
|
|
* SPDX-License-Identifier: GPL-2.0+
|
|
*/
|
|
|
|
#include <common.h>
|
|
#include <dm.h>
|
|
#include <usb.h>
|
|
#include <asm/gpio.h>
|
|
#include <fdt_support.h>
|
|
|
|
DECLARE_GLOBAL_DATA_PTR;
|
|
|
|
/* pointer to the device tree ammended by the firmware */
|
|
extern const void *fw_dtb;
|
|
|
|
static char wlan_mac[ARP_HLEN];
|
|
static char bt_mac[ARP_HLEN];
|
|
|
|
int dram_init(void)
|
|
{
|
|
gd->ram_size = PHYS_SDRAM_1_SIZE;
|
|
return 0;
|
|
}
|
|
|
|
int dram_init_banksize(void)
|
|
{
|
|
gd->bd->bi_dram[0].start = PHYS_SDRAM_1;
|
|
gd->bd->bi_dram[0].size = PHYS_SDRAM_1_SIZE;
|
|
|
|
return 0;
|
|
}
|
|
|
|
int board_prepare_usb(enum usb_init_type type)
|
|
{
|
|
static struct udevice *pmic_gpio;
|
|
static struct gpio_desc hub_reset, usb_sel;
|
|
int ret = 0, node;
|
|
|
|
if (!pmic_gpio) {
|
|
ret = uclass_get_device_by_name(UCLASS_GPIO,
|
|
"pm8916_gpios@c000",
|
|
&pmic_gpio);
|
|
if (ret < 0) {
|
|
printf("Failed to find pm8916_gpios@c000 node.\n");
|
|
return ret;
|
|
}
|
|
}
|
|
|
|
/* Try to request gpios needed to start usb host on dragonboard */
|
|
if (!dm_gpio_is_valid(&hub_reset)) {
|
|
node = fdt_subnode_offset(gd->fdt_blob,
|
|
dev_of_offset(pmic_gpio),
|
|
"usb_hub_reset_pm");
|
|
if (node < 0) {
|
|
printf("Failed to find usb_hub_reset_pm dt node.\n");
|
|
return node;
|
|
}
|
|
ret = gpio_request_by_name_nodev(offset_to_ofnode(node),
|
|
"gpios", 0, &hub_reset, 0);
|
|
if (ret < 0) {
|
|
printf("Failed to request usb_hub_reset_pm gpio.\n");
|
|
return ret;
|
|
}
|
|
}
|
|
|
|
if (!dm_gpio_is_valid(&usb_sel)) {
|
|
node = fdt_subnode_offset(gd->fdt_blob,
|
|
dev_of_offset(pmic_gpio),
|
|
"usb_sw_sel_pm");
|
|
if (node < 0) {
|
|
printf("Failed to find usb_sw_sel_pm dt node.\n");
|
|
return 0;
|
|
}
|
|
ret = gpio_request_by_name_nodev(offset_to_ofnode(node),
|
|
"gpios", 0, &usb_sel, 0);
|
|
if (ret < 0) {
|
|
printf("Failed to request usb_sw_sel_pm gpio.\n");
|
|
return ret;
|
|
}
|
|
}
|
|
|
|
if (type == USB_INIT_HOST) {
|
|
/* Start USB Hub */
|
|
dm_gpio_set_dir_flags(&hub_reset,
|
|
GPIOD_IS_OUT | GPIOD_IS_OUT_ACTIVE);
|
|
mdelay(100);
|
|
/* Switch usb to host connectors */
|
|
dm_gpio_set_dir_flags(&usb_sel,
|
|
GPIOD_IS_OUT | GPIOD_IS_OUT_ACTIVE);
|
|
mdelay(100);
|
|
} else { /* Device */
|
|
/* Disable hub */
|
|
dm_gpio_set_dir_flags(&hub_reset, GPIOD_IS_OUT);
|
|
/* Switch back to device connector */
|
|
dm_gpio_set_dir_flags(&usb_sel, GPIOD_IS_OUT);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* Check for vol- button - if pressed - stop autoboot */
|
|
int misc_init_r(void)
|
|
{
|
|
struct udevice *pon;
|
|
struct gpio_desc resin;
|
|
int node, ret;
|
|
|
|
ret = uclass_get_device_by_name(UCLASS_GPIO, "pm8916_pon@800", &pon);
|
|
if (ret < 0) {
|
|
printf("Failed to find PMIC pon node. Check device tree\n");
|
|
return 0;
|
|
}
|
|
|
|
node = fdt_subnode_offset(gd->fdt_blob, dev_of_offset(pon),
|
|
"key_vol_down");
|
|
if (node < 0) {
|
|
printf("Failed to find key_vol_down node. Check device tree\n");
|
|
return 0;
|
|
}
|
|
|
|
if (gpio_request_by_name_nodev(offset_to_ofnode(node), "gpios", 0,
|
|
&resin, 0)) {
|
|
printf("Failed to request key_vol_down button.\n");
|
|
return 0;
|
|
}
|
|
|
|
if (dm_gpio_get_value(&resin)) {
|
|
env_set("bootdelay", "-1");
|
|
printf("Power button pressed - dropping to console.\n");
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
int board_init(void)
|
|
{
|
|
int offset, len;
|
|
const char *mac;
|
|
|
|
/* take a copy of the firmware information (the user could unknownly
|
|
overwrite that DDR via tftp or other means) */
|
|
|
|
offset = fdt_node_offset_by_compatible(fw_dtb, -1, "qcom,wcnss-wlan");
|
|
if (offset >= 0) {
|
|
mac = fdt_getprop(fw_dtb, offset, "local-mac-address", &len);
|
|
if (mac)
|
|
memcpy(wlan_mac, mac, ARP_HLEN);
|
|
}
|
|
|
|
offset = fdt_node_offset_by_compatible(fw_dtb, -1, "qcom,wcnss-bt");
|
|
if (offset >= 0) {
|
|
mac = fdt_getprop(fw_dtb, offset, "local-bd-address", &len);
|
|
if (mac)
|
|
memcpy(bt_mac, mac, ARP_HLEN);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
int ft_board_setup(void *blob, bd_t *bd)
|
|
{
|
|
do_fixup_by_compat(blob, "qcom,wcnss-wlan", "local-mac-address",
|
|
wlan_mac, ARP_HLEN, 1);
|
|
|
|
do_fixup_by_compat(blob, "qcom,wcnss-bt", "local-bd-address",
|
|
bt_mac, ARP_HLEN, 1);
|
|
|
|
return 0;
|
|
}
|