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