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// SPDX-License-Identifier: GPL-2.0-only
// SPDX-FileCopyrightText: 2018 Grinn
/* Author: Marcin Niestroj <m.niestroj@grinn-global.com> */
#define pr_fmt(fmt) "liteboard: " fmt
#include <bootsource.h>
#include <common.h>
#include <envfs.h>
#include <init.h>
#include <mach/imx/bbu.h>
#include <mach/imx/imx6.h>
#include <malloc.h>
#include <mfd/imx6q-iomuxc-gpr.h>
#include <of.h>
static void bbu_register_handler_sd(bool is_boot_source)
{
imx6_bbu_internal_mmc_register_handler("sd", "/dev/mmc0.barebox",
is_boot_source ? BBU_HANDLER_FLAG_DEFAULT : 0);
}
static void bbu_register_handler_emmc(bool is_boot_source)
{
int emmc_boot_flag = 0, emmc_flag = 0;
const char *bootpart;
struct device *dev;
int ret;
if (!is_boot_source)
goto bbu_register;
dev = get_device_by_name("mmc1");
if (!dev) {
pr_warn("Failed to get eMMC device\n");
goto bbu_register;
}
ret = device_detect(dev);
if (ret) {
pr_warn("Failed to probe eMMC\n");
goto bbu_register;
}
bootpart = dev_get_param(dev, "boot");
if (!bootpart) {
pr_warn("Failed to get eMMC boot configuration\n");
goto bbu_register;
}
if (!strncmp(bootpart, "boot", 4))
emmc_boot_flag |= BBU_HANDLER_FLAG_DEFAULT;
else
emmc_flag |= BBU_HANDLER_FLAG_DEFAULT;
bbu_register:
imx6_bbu_internal_mmc_register_handler("emmc", "/dev/mmc1.barebox",
emmc_flag);
imx6_bbu_internal_mmcboot_register_handler("emmc-boot", "mmc1",
emmc_boot_flag);
}
static const struct {
const char *name;
const char *env;
void (*bbu_register_handler)(bool);
} boot_sources[] = {
{"SD", "/chosen/environment-sd", bbu_register_handler_sd},
{"eMMC", "/chosen/environment-emmc", bbu_register_handler_emmc},
};
static int liteboard_devices_init(void)
{
int boot_source_idx = 0;
int ret;
int i;
if (!of_machine_is_compatible("grinn,imx6ul-liteboard"))
return 0;
barebox_set_hostname("liteboard");
if (bootsource_get() == BOOTSOURCE_MMC) {
int mmc_idx = bootsource_get_instance();
if (0 <= mmc_idx && mmc_idx < ARRAY_SIZE(boot_sources))
boot_source_idx = mmc_idx;
}
ret = of_device_enable_path(boot_sources[boot_source_idx].env);
if (ret < 0)
pr_warn("Failed to enable environment partition '%s' (%d)\n",
boot_sources[boot_source_idx].env, ret);
pr_notice("Using environment in %s\n",
boot_sources[boot_source_idx].name);
for (i = 0; i < ARRAY_SIZE(boot_sources); i++)
boot_sources[i].bbu_register_handler(boot_source_idx == i);
return 0;
}
device_initcall(liteboard_devices_init);
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