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imx6: aristainetos: add i2c eeprom support

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add support for i2c eeprom and add parsing "Rescue"
or "DefEnv" at offset 0x1ff0.

Signed-off-by: Heiko Schocher <hs@denx.de>
This commit is contained in:
Heiko Schocher
2019-12-01 11:23:23 +01:00
committed by Stefano Babic
parent 44184c2aa8
commit f7cf76f8ac
1 changed files with 63 additions and 1 deletions
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64
board/aristainetos/aristainetos.c
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@@ -24,6 +24,8 @@
#include <bmp_logo.h>
#include <dm/root.h>
#include <env.h>
#include <i2c_eeprom.h>
#include <i2c.h>
#include <micrel.h>
#include <miiphy.h>
#include <lcd.h>
@@ -323,6 +325,64 @@ static void setup_board_gpio(void)
setup_one_led("led_blue", LEDST_OFF);
}
#define ARI_RESC_FMT "setenv rescue_reason setenv bootargs \\${bootargs}" \
" rescueReason=%d "
static void aristainetos_run_rescue_command(int reason)
{
char rescue_reason_command[80];
sprintf(rescue_reason_command, ARI_RESC_FMT, reason);
run_command(rescue_reason_command, 0);
}
static int aristainetos_eeprom(void)
{
struct udevice *dev;
int off;
int ret;
u8 data[0x10];
u8 rescue_reason;
off = fdt_path_offset(gd->fdt_blob, "eeprom0");
if (off < 0) {
printf("%s: No eeprom0 path offset\n", __func__);
return off;
}
ret = uclass_get_device_by_of_offset(UCLASS_I2C_EEPROM, off, &dev);
if (ret) {
printf("%s: Could not find EEPROM\n", __func__);
return ret;
}
ret = i2c_set_chip_offset_len(dev, 2);
if (ret)
return ret;
ret = i2c_eeprom_read(dev, 0x1ff0, (uint8_t *)data, 6);
if (ret) {
printf("%s: Could not read EEPROM\n", __func__);
return ret;
}
if (strncmp((char *)&data[3], "ReScUe", 6) == 0) {
rescue_reason = *(uint8_t *)&data[9];
memset(&data[3], 0xff, 7);
i2c_eeprom_write(dev, 0x1ff0, (uint8_t *)&data[3], 7);
printf("\nBooting into Rescue System (EEPROM)\n");
aristainetos_run_rescue_command(rescue_reason);
run_command("run rescue_load_fit rescueboot", 0);
} else if (strncmp((char *)data, "DeF", 3) == 0) {
memset(data, 0xff, 3);
i2c_eeprom_write(dev, 0x1ff0, (uint8_t *)data, 3);
printf("\nClear u-boot environment (set back to defaults)\n");
run_command("run default_env; saveenv; saveenv", 0);
}
return 0;
};
int board_late_init(void)
{
char *my_bootdelay;
@@ -372,12 +432,14 @@ int board_late_init(void)
}
}
/* eeprom work */
aristainetos_eeprom();
/* set board_type */
if (gd->board_type == BOARD_TYPE_4)
env_set("board_type", ARI_BT_4);
else
env_set("board_type", ARI_BT_7);
return 0;
}