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 #include <power/rk8xx_pmic.h> 16 17 static int valid_rk3288_som(struct rk3288_som *som) 18 { 19 unsigned char *p = (unsigned char *)som; 20 unsigned char *e = p + sizeof(struct rk3288_som) - 1; 21 int hw = 0; 22 23 while (p < e) { 24 hw += hweight8(*p); 25 p++; 26 } 27 28 return hw == som->bs; 29 } 30 31 #if defined(CONFIG_SPL_BUILD) && !defined(CONFIG_SPL_OF_PLATDATA) 32 static int phycore_init(void) 33 { 34 struct udevice *pmic; 35 int ret; 36 37 ret = uclass_first_device_err(UCLASS_PMIC, &pmic); 38 if (ret) 39 return ret; 40 41 #if defined(CONFIG_SPL_POWER_SUPPORT) 42 /* Increase USB input current to 2A */ 43 ret = rk818_spl_configure_usb_input_current(pmic, 2000); 44 if (ret) 45 return ret; 46 47 /* Close charger when USB lower then 3.26V */ 48 ret = rk818_spl_configure_usb_chrg_shutdown(pmic, 3260000); 49 if (ret) 50 return ret; 51 #endif 52 53 return 0; 54 } 55 56 int rk_board_init_f(void) 57 { 58 int ret = 0; 59 60 if (of_machine_is_compatible("phytec,rk3288-phycore-som")) { 61 ret = phycore_init(); 62 if (ret) { 63 debug("Failed to set up phycore power settings: %d\n", 64 ret); 65 return ret; 66 } 67 } 68 69 return 0; 70 } 71 #endif 72 73 int rk3288_board_late_init(void) 74 { 75 int ret; 76 struct udevice *dev; 77 struct rk3288_som opt; 78 int off; 79 80 /* Get the identificatioin page of M24C32-D EEPROM */ 81 off = fdt_path_offset(gd->fdt_blob, "eeprom0"); 82 if (off < 0) { 83 printf("%s: No eeprom0 path offset\n", __func__); 84 return off; 85 } 86 87 ret = uclass_get_device_by_of_offset(UCLASS_I2C_EEPROM, off, &dev); 88 if (ret) { 89 printf("%s: Could not find EEPROM\n", __func__); 90 return ret; 91 } 92 93 ret = i2c_set_chip_offset_len(dev, 2); 94 if (ret) 95 return ret; 96 97 ret = i2c_eeprom_read(dev, 0, (uint8_t *)&opt, 98 sizeof(struct rk3288_som)); 99 if (ret) { 100 printf("%s: Could not read EEPROM\n", __func__); 101 return ret; 102 } 103 104 if (opt.api_version != 0 || !valid_rk3288_som(&opt)) { 105 printf("Invalid data or wrong EEPROM layout version.\n"); 106 /* Proceed anyway, since there is no fallback option */ 107 } 108 109 if (is_valid_ethaddr(opt.mac)) 110 eth_env_set_enetaddr("ethaddr", opt.mac); 111 112 return 0; 113 } 114