1// SPDX-License-Identifier: GPL-2.0+ 2/* 3 * Copyright (C) Guangzhou FriendlyARM Computer Tech. Co., Ltd. 4 * (http://www.friendlyarm.com) 5 */ 6 7#include <config.h> 8#include <common.h> 9#include <i2c.h> 10#include <asm/io.h> 11 12#include <asm/arch/nexell.h> 13#include <asm/arch/nx_gpio.h> 14 15/* Board revision list: <PCB3 | PCB2 | PCB1> 16 * 0b000 - NanoPi 2 17 * 0b001 - NanoPC-T2 18 * 0b010 - NanoPi S2 19 * 0b011 - Smart4418 20 * 0b100 - NanoPi Fire 2A 21 * 0b111 - NanoPi M2A 22 * 23 * Extented revision: 24 * 0b001 - Smart4418-SDK 25 */ 26#define __IO_GRP 2 /* GPIO_C */ 27#define __IO_PCB1 26 28#define __IO_PCB2 27 29#define __IO_PCB3 25 30 31static int pcb_rev = -1; 32static int base_rev; 33 34static void bd_hwrev_config_gpio(void) 35{ 36 int gpios[3][2] = { 37 { __IO_PCB1, 1 }, 38 { __IO_PCB2, 1 }, 39 { __IO_PCB3, 1 }, 40 }; 41 int i; 42 43 /* gpio input mode, pull-down */ 44 for (i = 0; i < 3; i++) { 45 nx_gpio_set_pad_function(__IO_GRP, gpios[i][0], gpios[i][1]); 46 nx_gpio_set_output_enable(__IO_GRP, gpios[i][0], 0); 47 nx_gpio_set_pull_mode(__IO_GRP, gpios[i][0], 0); 48 } 49} 50 51void bd_hwrev_init(void) 52{ 53 if (pcb_rev >= 0) 54 return; 55 56 bd_hwrev_config_gpio(); 57 58 pcb_rev = nx_gpio_get_input_value(__IO_GRP, __IO_PCB1); 59 pcb_rev |= nx_gpio_get_input_value(__IO_GRP, __IO_PCB2) << 1; 60 pcb_rev |= nx_gpio_get_input_value(__IO_GRP, __IO_PCB3) << 2; 61} 62 63/* Get extended revision for SmartXX18 */ 64void bd_base_rev_init(void) 65{ 66 struct udevice *dev; 67 u8 val = 0; 68 69 if (pcb_rev != 0x3) 70 return; 71 72#define PCA9536_I2C_BUS 2 73#define PCA9636_I2C_ADDR 0x41 74 if (i2c_get_chip_for_busnum 75 (PCA9536_I2C_BUS, PCA9636_I2C_ADDR, 1, &dev)) 76 return; 77 78 if (!dm_i2c_read(dev, 0, &val, 1)) 79 base_rev = (val & 0xf); 80} 81 82/* To override __weak symbols */ 83u32 get_board_revision(void) 84{ 85 return (base_rev << 8) | pcb_rev; 86} 87 88#ifdef CONFIG_REVISION_TAG 89u32 get_board_rev(void) 90{ 91 return get_board_revision(); 92} 93#endif 94 95const char *get_board_name(void) 96{ 97 bd_hwrev_init(); 98 99 switch (pcb_rev) { 100 case 0: 101 return "NanoPi 2"; 102 case 1: 103 return "NanoPC-T2"; 104 case 2: 105 return "NanoPi S2"; 106 case 3: 107 return "Smart4418"; 108 case 4: 109 return "NanoPi Fire 2A"; 110 case 7: 111 return "NanoPi M2A"; 112 default: 113 return "s5p4418-X"; 114 } 115} 116