board/qca/ap121/ap121.c

   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 }