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8bc780106c
Use the ADC channel 1 to check the hardware revision of the board and detect the N2 vs. N2+ and the C4 vs. HC4 variants. Each of them use different dtb file, so adjust fdtfile environment variable to the detected variant. The ADC min/max values for each variant are taken from the vendor code, adjusted to the 12-bit ADC driver operation mode (vendor code use 10-bit mode). Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com> Reviewed-by: Jaehoon Chung <jh80.chung@samsung.com> Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
143 lines
3.3 KiB
C
143 lines
3.3 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Copyright (C) 2020 BayLibre, SAS
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* Author: Neil Armstrong <narmstrong@baylibre.com>
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*/
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#include <common.h>
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#include <dm.h>
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#include <adc.h>
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#include <env.h>
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#include <init.h>
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#include <net.h>
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#include <asm/io.h>
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#include <asm/arch/boot.h>
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#include <asm/arch/sm.h>
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#include <asm/arch/eth.h>
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#include <asm/arch/boot.h>
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#define EFUSE_MAC_OFFSET 20
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#define EFUSE_MAC_SIZE 12
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#define MAC_ADDR_LEN 6
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#define ODROID_HW_VS_ADC_CHANNEL 1
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#define MESON_SOC_ID_G12B 0x29
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#define MESON_SOC_ID_SM1 0x2b
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int mmc_get_env_dev(void)
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{
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if (meson_get_boot_device() == BOOT_DEVICE_EMMC)
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return 1;
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return 0;
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}
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/* Variant detection is based on the ADC RAW values for the channel #1 */
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static struct meson_odroid_boards {
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unsigned int soc_id;
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unsigned int adc_min;
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unsigned int adc_max;
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char *variant;
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} boards[] = {
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/* OdroidN2 rev 2018,7,23 */
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{ MESON_SOC_ID_G12B, 80 * 4, 90 * 4, "n2" },
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/* OdroidN2 rev 2018,12,6 */
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{ MESON_SOC_ID_G12B, 160 * 4, 170 * 4, "n2" },
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/* OdroidN2 rev 2019,1,17 */
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{ MESON_SOC_ID_G12B, 245 * 4, 255 * 4, "n2" },
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/* OdroidN2 rev 2019,2,7 */
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{ MESON_SOC_ID_G12B, 330 * 4, 350 * 4, "n2" },
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/* OdroidN2plus rev 2019,11,20 */
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{ MESON_SOC_ID_G12B, 410 * 4, 430 * 4, "n2_plus" },
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/* OdroidC4 rev 2020,01,29 */
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{ MESON_SOC_ID_SM1, 80 * 4, 100 * 4, "c4" },
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/* OdroidHC4 rev 2019,12,10 */
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{ MESON_SOC_ID_SM1, 300 * 4, 320 * 4, "hc4" },
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/* OdroidC4 rev 2019,11,29 */
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{ MESON_SOC_ID_SM1, 335 * 4, 345 * 4, "c4" },
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/* OdroidHC4 rev 2020,8,7 */
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{ MESON_SOC_ID_SM1, 590 * 4, 610 * 4, "hc4" },
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};
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static void odroid_set_fdtfile(char *soc, char *variant)
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{
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char s[128];
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snprintf(s, sizeof(s), "amlogic/meson-%s-odroid-%s.dtb", soc, variant);
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env_set("fdtfile", s);
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}
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static int odroid_detect_variant(void)
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{
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char *variant = "", *soc = "";
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unsigned int adcval = 0;
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int ret, i, soc_id = 0;
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if (of_machine_is_compatible("amlogic,sm1")) {
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soc_id = MESON_SOC_ID_SM1;
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soc = "sm1";
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} else if (of_machine_is_compatible("amlogic,g12b")) {
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soc_id = MESON_SOC_ID_G12B;
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soc = "g12b";
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} else {
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return -1;
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}
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ret = adc_channel_single_shot("adc@9000", ODROID_HW_VS_ADC_CHANNEL,
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&adcval);
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if (ret)
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return ret;
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for (i = 0 ; i < ARRAY_SIZE(boards) ; ++i) {
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if (soc_id == boards[i].soc_id &&
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adcval >= boards[i].adc_min &&
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adcval < boards[i].adc_max) {
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variant = boards[i].variant;
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break;
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}
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}
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printf("Board variant: %s\n", variant);
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env_set("variant", variant);
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odroid_set_fdtfile(soc, variant);
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return 0;
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}
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int misc_init_r(void)
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{
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u8 mac_addr[MAC_ADDR_LEN];
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char efuse_mac_addr[EFUSE_MAC_SIZE], tmp[3];
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ssize_t len;
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if (IS_ENABLED(CONFIG_ENV_VARS_UBOOT_RUNTIME_CONFIG) &&
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meson_get_soc_rev(tmp, sizeof(tmp)) > 0)
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env_set("soc_rev", tmp);
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meson_eth_init(PHY_INTERFACE_MODE_RGMII, 0);
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if (!eth_env_get_enetaddr("ethaddr", mac_addr)) {
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len = meson_sm_read_efuse(EFUSE_MAC_OFFSET,
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efuse_mac_addr, EFUSE_MAC_SIZE);
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if (len != EFUSE_MAC_SIZE)
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return 0;
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/* MAC is stored in ASCII format, 1bytes = 2characters */
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for (int i = 0; i < 6; i++) {
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tmp[0] = efuse_mac_addr[i * 2];
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tmp[1] = efuse_mac_addr[i * 2 + 1];
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tmp[2] = '\0';
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mac_addr[i] = simple_strtoul(tmp, NULL, 16);
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}
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if (is_valid_ethaddr(mac_addr))
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eth_env_set_enetaddr("ethaddr", mac_addr);
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else
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meson_generate_serial_ethaddr();
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}
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odroid_detect_variant();
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return 0;
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}
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