1 /* 2 * (C) Copyright 2016 Rockchip Electronics Co., Ltd 3 * 4 * SPDX-License-Identifier: GPL-2.0+ 5 */ 6 7 #include <common.h> 8 #include <adc.h> 9 #include <asm/io.h> 10 #include <asm/arch/boot_mode.h> 11 #include <cli.h> 12 #include <dm.h> 13 #include <fdtdec.h> 14 15 DECLARE_GLOBAL_DATA_PTR; 16 17 void set_back_to_bootrom_dnl_flag(void) 18 { 19 writel(BOOT_BROM_DOWNLOAD, CONFIG_ROCKCHIP_BOOT_MODE_REG); 20 } 21 22 /* 23 * detect download key status by adc, most rockchip 24 * based boards use adc sample the download key status, 25 * but there are also some use gpio. So it's better to 26 * make this a weak function that can be override by 27 * some special boards. 28 */ 29 #define KEY_DOWN_MIN_VAL 0 30 #define KEY_DOWN_MAX_VAL 30 31 32 __weak int rockchip_dnl_key_pressed(void) 33 { 34 const void *blob = gd->fdt_blob; 35 unsigned int val; 36 int channel = 1; 37 int node; 38 u32 chns[2]; 39 40 node = fdt_node_offset_by_compatible(blob, 0, "adc-keys"); 41 if (node >= 0) { 42 if (!fdtdec_get_int_array(blob, node, "io-channels", chns, 2)) 43 channel = chns[1]; 44 } 45 46 if (adc_channel_single_shot("saradc", channel, &val)) { 47 printf("%s adc_channel_single_shot fail!\n", __func__); 48 return false; 49 } 50 51 if ((val >= KEY_DOWN_MIN_VAL) && (val <= KEY_DOWN_MAX_VAL)) 52 return true; 53 else 54 return false; 55 } 56 57 void rockchip_dnl_mode_check(void) 58 { 59 if (rockchip_dnl_key_pressed()) { 60 printf("download key pressed, entering download mode...\n"); 61 /* If failed, we fall back to bootrom download mode */ 62 cli_simple_run_command("rockusb 0 mmc 0", 0); 63 set_back_to_bootrom_dnl_flag(); 64 do_reset(NULL, 0, 0, NULL); 65 } 66 } 67 68 int setup_boot_mode(void) 69 { 70 void *reg; 71 int boot_mode; 72 73 rockchip_dnl_mode_check(); 74 75 reg = (void *)CONFIG_ROCKCHIP_BOOT_MODE_REG; 76 77 boot_mode = readl(reg); 78 79 debug("boot mode %x.\n", boot_mode); 80 81 /* Clear boot mode */ 82 writel(BOOT_NORMAL, reg); 83 84 switch (boot_mode) { 85 case BOOT_FASTBOOT: 86 printf("enter fastboot!\n"); 87 env_set("preboot", "setenv preboot; fastboot usb 0"); 88 break; 89 case BOOT_UMS: 90 printf("enter UMS!\n"); 91 env_set("preboot", "setenv preboot; ums mmc 0"); 92 break; 93 case BOOT_LOADER: 94 printf("enter Rockusb!\n"); 95 env_set("preboot", "setenv preboot; rockusb 0 mmc 0"); 96 break; 97 case BOOT_CHARGING: 98 printf("enter charging!\n"); 99 env_set("preboot", "setenv preboot; charge"); 100 break; 101 } 102 103 return 0; 104 } 105