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/*
* Copyright (C) 2015 Samsung Electronics
* Przemyslaw Marczak <p.marczak@samsung.com>
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <adc.h>
#include <dm.h>
#include <errno.h>
#include <fdtdec.h>
#include <power/pmic.h>
#include <power/regulator.h>
#include <power/s2mps11.h>
#include <samsung/exynos5-dt-types.h>
#include <samsung/misc.h>
DECLARE_GLOBAL_DATA_PTR;
static const struct udevice_id board_ids[] = {
{ .compatible = "samsung,odroidxu3", .data = EXYNOS5_BOARD_ODROID_XU3 },
{ .compatible = "samsung,exynos5", .data = EXYNOS5_BOARD_GENERIC },
{ },
};
/**
* Odroix XU3/4 board revisions:
* Rev ADCmax Board
* 0.1 0 XU3 0.1
* 0.2 410 XU3 0.2 | XU3L - no DISPLAYPORT (probe I2C0:0x40 / INA231)
* 0.3 1408 XU4 0.1
* Use +10 % for ADC value tolerance.
*/
struct odroid_rev_info odroid_info[] = {
{ EXYNOS5_BOARD_ODROID_XU3_REV01, 1, 10, "xu3" },
{ EXYNOS5_BOARD_ODROID_XU3_REV02, 2, 410, "xu3" },
{ EXYNOS5_BOARD_ODROID_XU4_REV01, 1, 1408, "xu4" },
{ EXYNOS5_BOARD_ODROID_UNKNOWN, 0, 4095, "unknown" },
};
static unsigned int odroid_get_rev(void)
{
int i;
for (i = 0; i < ARRAY_SIZE(odroid_info); i++) {
if (odroid_info[i].board_type == gd->board_type)
return odroid_info[i].board_rev;
}
return 0;
}
static int odroid_get_board_type(void)
{
unsigned int adcval;
int ret, i;
ret = adc_channel_single_shot("adc", CONFIG_ODROID_REV_AIN, &adcval);
if (ret)
goto rev_default;
for (i = 0; i < ARRAY_SIZE(odroid_info); i++) {
/* ADC tolerance: +20 % */
if (adcval < odroid_info[i].adc_val)
return odroid_info[i].board_type;
}
rev_default:
return EXYNOS5_BOARD_ODROID_XU3;
}
/**
* odroid_get_type_str - returns pointer to one of the board type string.
* Board types: "xu3", "xu3-lite", "xu4". However the "xu3lite" can be
* detected only when the i2c controller is ready to use. Fortunately,
* XU3 and XU3L are compatible, and the information about board lite
* revision is needed before booting the linux, to set proper environment
* variable: $fdtfile.
*/
static const char *odroid_get_type_str(void)
{
const char *type_xu3l = "xu3-lite";
struct udevice *dev, *chip;
int i, ret;
if (gd->board_type != EXYNOS5_BOARD_ODROID_XU3_REV02)
goto exit;
ret = pmic_get("s2mps11", &dev);
if (ret)
goto exit;
/* Enable LDO26: 3.0V */
ret = pmic_reg_write(dev, S2MPS11_REG_L26CTRL,
S2MPS11_LDO26_ENABLE);
if (ret)
goto exit;
/* Check XU3Lite by probe INA231 I2C0:0x40 */
ret = uclass_get_device(UCLASS_I2C, 0, &dev);
if (ret)
goto exit;
ret = dm_i2c_probe(dev, 0x40, 0x0, &chip);
if (ret)
return type_xu3l;
exit:
for (i = 0; i < ARRAY_SIZE(odroid_info); i++) {
if (odroid_info[i].board_type == gd->board_type)
return odroid_info[i].name;
}
return NULL;
}
bool board_is_odroidxu3(void)
{
if (gd->board_type >= EXYNOS5_BOARD_ODROID_XU3 &&
gd->board_type <= EXYNOS5_BOARD_ODROID_XU3_REV02)
return true;
return false;
}
bool board_is_odroidxu4(void)
{
if (gd->board_type == EXYNOS5_BOARD_ODROID_XU4_REV01)
return true;
return false;
}
bool board_is_generic(void)
{
if (gd->board_type == EXYNOS5_BOARD_GENERIC)
return true;
return false;
}
/**
* get_board_rev() - return detected board revision.
*
* @return: return board revision number for XU3 or 0 for generic
*/
u32 get_board_rev(void)
{
if (board_is_generic())
return 0;
return odroid_get_rev();
}
/**
* get_board_type() - returns board type string.
*
* @return: return board type string for XU3 or empty string for generic
*/
const char *get_board_type(void)
{
const char *generic = "";
if (board_is_generic())
return generic;
return odroid_get_type_str();
}
/**
* set_board_type() - set board type in gd->board_type.
* As default type set EXYNOS5_BOARD_GENERIC, if detect Odroid,
* then set its proper type.
*/
void set_board_type(void)
{
const struct udevice_id *of_match = board_ids;
int ret;
gd->board_type = EXYNOS5_BOARD_GENERIC;
while (of_match->compatible) {
ret = fdt_node_check_compatible(gd->fdt_blob, 0,
of_match->compatible);
if (ret)
of_match++;
gd->board_type = of_match->data;
break;
}
/* If Odroid, then check its revision */
if (board_is_odroidxu3())
gd->board_type = odroid_get_board_type();
}
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