1 /* 2 * (C) Copyright 2015 Rockchip Electronics Co., Ltd 3 * 4 * SPDX-License-Identifier: GPL-2.0+ 5 */ 6 7 #include <common.h> 8 #include <asm/io.h> 9 #include <asm/arch/grf_rk3036.h> 10 #include <asm/arch/hardware.h> 11 #include <asm/arch/sdram_rk3036.h> 12 #include <asm/arch/timer.h> 13 #include <asm/arch/uart.h> 14 15 DECLARE_GLOBAL_DATA_PTR; 16 17 #define GRF_BASE 0x20008000 18 static struct rk3036_grf * const grf = (void *)GRF_BASE; 19 20 #define DEBUG_UART_BASE 0x20068000 21 22 extern void back_to_bootrom(void); 23 24 void board_init_f(ulong dummy) 25 { 26 #ifdef EARLY_DEBUG 27 /* 28 * NOTE: sd card and debug uart use same iomux in rk3036, 29 * so if you enable uart, 30 * you can not boot from sdcard 31 */ 32 rk_clrsetreg(&grf->gpio1c_iomux, 33 GPIO1C3_MASK << GPIO1C3_SHIFT | 34 GPIO1C2_MASK << GPIO1C2_SHIFT, 35 GPIO1C3_UART2_SOUT << GPIO1C3_SHIFT | 36 GPIO1C2_UART2_SIN << GPIO1C2_SHIFT); 37 rk_uart_init((void *)DEBUG_UART_BASE); 38 #endif 39 rockchip_timer_init(); 40 sdram_init(); 41 42 /* return to maskrom */ 43 back_to_bootrom(); 44 } 45 46 /* Place Holders */ 47 void board_init_r(gd_t *id, ulong dest_addr) 48 { 49 /* 50 * Function attribute is no-return 51 * This Function never executes 52 */ 53 while (1) 54 ; 55 } 56