1 /* 2 * Copyright (C) 2015-2016 Wills Wang <wills.wang@live.com> 3 * 4 * SPDX-License-Identifier: GPL-2.0+ 5 */ 6 7 #include <common.h> 8 #include <asm/io.h> 9 #include <asm/addrspace.h> 10 #include <asm/types.h> 11 #include <mach/ar71xx_regs.h> 12 #include <mach/ddr.h> 13 #include <mach/ath79.h> 14 #include <debug_uart.h> 15 16 #ifdef CONFIG_DEBUG_UART_BOARD_INIT 17 void board_debug_uart_init(void) 18 { 19 void __iomem *regs; 20 u32 val; 21 22 regs = map_physmem(AR71XX_GPIO_BASE, AR71XX_GPIO_SIZE, 23 MAP_NOCACHE); 24 25 /* 26 * GPIO9 as input, GPIO10 as output 27 */ 28 val = readl(regs + AR71XX_GPIO_REG_OE); 29 val &= ~AR933X_GPIO(9); 30 val |= AR933X_GPIO(10); 31 writel(val, regs + AR71XX_GPIO_REG_OE); 32 33 /* 34 * Enable UART, GPIO9 as UART_SI, GPIO10 as UART_SO 35 */ 36 val = readl(regs + AR71XX_GPIO_REG_FUNC); 37 val |= AR933X_GPIO_FUNC_UART_EN | AR933X_GPIO_FUNC_RES_TRUE; 38 writel(val, regs + AR71XX_GPIO_REG_FUNC); 39 } 40 #endif 41 42 int board_early_init_f(void) 43 { 44 ddr_init(); 45 ath79_eth_reset(); 46 return 0; 47 } 48