1 /* 2 * Copyright (C) 2017 PHYTEC Messtechnik GmbH 3 * Author: Wadim Egorov <w.egorov@phytec.de> 4 * 5 * SPDX-License-Identifier: GPL-2.0+ 6 */ 7 8 #include <asm/io.h> 9 #include <common.h> 10 #include <dm.h> 11 #include <i2c.h> 12 #include <i2c_eeprom.h> 13 #include <netdev.h> 14 #include "som.h" 15 16 static int valid_rk3288_som(struct rk3288_som *som) 17 { 18 unsigned char *p = (unsigned char *)som; 19 unsigned char *e = p + sizeof(struct rk3288_som) - 1; 20 int hw = 0; 21 22 while (p < e) { 23 hw += hweight8(*p); 24 p++; 25 } 26 27 return hw == som->bs; 28 } 29 30 #if defined(CONFIG_SPL_BUILD) && !defined(CONFIG_SPL_OF_PLATDATA) 31 static int phycore_init(void) 32 { 33 struct udevice *pmic; 34 int ret; 35 36 ret = uclass_first_device_err(UCLASS_PMIC, &pmic); 37 if (ret) 38 return ret; 39 40 #if defined(CONFIG_SPL_POWER_SUPPORT) 41 /* Increase USB input current to 2A */ 42 ret = rk818_spl_configure_usb_input_current(pmic, 2000); 43 if (ret) 44 return ret; 45 46 /* Close charger when USB lower then 3.26V */ 47 ret = rk818_spl_configure_usb_chrg_shutdown(pmic, 3260000); 48 if (ret) 49 return ret; 50 #endif 51 52 return 0; 53 } 54 55 int rk_board_init_f(void) 56 { 57 int ret = 0; 58 59 if (of_machine_is_compatible("phytec,rk3288-phycore-som")) { 60 ret = phycore_init(); 61 if (ret) { 62 debug("Failed to set up phycore power settings: %d\n", 63 ret); 64 return ret; 65 } 66 } 67 68 return 0; 69 } 70 #endif 71 72 int rk3288_board_late_init(void) 73 { 74 int ret; 75 struct udevice *dev; 76 struct rk3288_som opt; 77 int off; 78 79 /* Get the identificatioin page of M24C32-D EEPROM */ 80 off = fdt_path_offset(gd->fdt_blob, "eeprom0"); 81 if (off < 0) { 82 printf("%s: No eeprom0 path offset\n", __func__); 83 return off; 84 } 85 86 ret = uclass_get_device_by_of_offset(UCLASS_I2C_EEPROM, off, &dev); 87 if (ret) { 88 printf("%s: Could not find EEPROM\n", __func__); 89 return ret; 90 } 91 92 ret = i2c_set_chip_offset_len(dev, 2); 93 if (ret) 94 return ret; 95 96 ret = i2c_eeprom_read(dev, 0, (uint8_t *)&opt, 97 sizeof(struct rk3288_som)); 98 if (ret) { 99 printf("%s: Could not read EEPROM\n", __func__); 100 return ret; 101 } 102 103 if (opt.api_version != 0 || !valid_rk3288_som(&opt)) { 104 printf("Invalid data or wrong EEPROM layout version.\n"); 105 /* Proceed anyway, since there is no fallback option */ 106 } 107 108 if (is_valid_ethaddr(opt.mac)) 109 eth_env_set_enetaddr("ethaddr", opt.mac); 110 111 return 0; 112 } 113