xref: /openbmc/u-boot/board/qca/ap121/ap121.c (revision 85231c08)
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 DECLARE_GLOBAL_DATA_PTR;
17 
18 #ifdef CONFIG_DEBUG_UART_BOARD_INIT
19 void board_debug_uart_init(void)
20 {
21 	void __iomem *regs;
22 	u32 val;
23 
24 	regs = map_physmem(AR71XX_GPIO_BASE, AR71XX_GPIO_SIZE,
25 			   MAP_NOCACHE);
26 
27 	/*
28 	 * GPIO9 as input, GPIO10 as output
29 	 */
30 	val = readl(regs + AR71XX_GPIO_REG_OE);
31 	val &= ~AR933X_GPIO(9);
32 	val |= AR933X_GPIO(10);
33 	writel(val, regs + AR71XX_GPIO_REG_OE);
34 
35 	/*
36 	 * Enable UART, GPIO9 as UART_SI, GPIO10 as UART_SO
37 	 */
38 	val = readl(regs + AR71XX_GPIO_REG_FUNC);
39 	val |= AR933X_GPIO_FUNC_UART_EN | AR933X_GPIO_FUNC_RES_TRUE;
40 	writel(val, regs + AR71XX_GPIO_REG_FUNC);
41 }
42 #endif
43 
44 int board_early_init_f(void)
45 {
46 	ddr_init();
47 	ath79_eth_reset();
48 	return 0;
49 }
50