2 * (C) Copyright 2010,2011
3 * NVIDIA Corporation <www.nvidia.com>
5 * See file CREDITS for list of people who contributed to this
8 * This program is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU General Public License as
10 * published by the Free Software Foundation; either version 2 of
11 * the License, or (at your option) any later version.
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
27 #include <asm/arch/tegra2.h>
28 #include <asm/arch/sys_proto.h>
30 #include <asm/arch/clk_rst.h>
31 #include <asm/arch/clock.h>
32 #include <asm/arch/pinmux.h>
33 #include <asm/arch/uart.h>
37 DECLARE_GLOBAL_DATA_PTR;
40 /* UARTs which we can enable */
46 const struct tegra2_sysinfo sysinfo = {
47 CONFIG_TEGRA2_BOARD_STRING
52 * Description: init the timestamp and lastinc value
59 static void enable_uart(enum periph_id pid)
61 /* Assert UART reset and enable clock */
62 reset_set_enable(pid, 1);
64 clock_ll_set_source(pid, 0); /* UARTx_CLK_SRC = 00, PLLP_OUT0 */
69 /* De-assert reset to UART */
70 reset_set_enable(pid, 0);
74 * Routine: clock_init_uart
75 * Description: init clock for the UART(s)
77 static void clock_init_uart(int uart_ids)
80 enable_uart(PERIPH_ID_UART1);
82 enable_uart(PERIPH_ID_UART2);
84 enable_uart(PERIPH_ID_UART4);
88 * Routine: pin_mux_uart
89 * Description: setup the pin muxes/tristate values for the UART(s)
91 static void pin_mux_uart(int uart_ids)
93 if (uart_ids & UARTA) {
94 pinmux_set_func(PINGRP_IRRX, PMUX_FUNC_UARTA);
95 pinmux_set_func(PINGRP_IRTX, PMUX_FUNC_UARTA);
96 pinmux_tristate_disable(PINGRP_IRRX);
97 pinmux_tristate_disable(PINGRP_IRTX);
99 if (uart_ids & UARTB) {
100 pinmux_set_func(PINGRP_UAD, PMUX_FUNC_IRDA);
101 pinmux_tristate_disable(PINGRP_UAD);
103 if (uart_ids & UARTD) {
104 pinmux_set_func(PINGRP_GMC, PMUX_FUNC_UARTD);
105 pinmux_tristate_disable(PINGRP_GMC);
110 * Routine: board_init
111 * Description: Early hardware init.
115 /* Do clocks and UART first so that printf() works */
119 #ifdef CONFIG_SPI_UART_SWITCH
122 #ifdef CONFIG_TEGRA2_SPI
125 /* boot param addr */
126 gd->bd->bi_boot_params = (NV_PA_SDRAM_BASE + 0x100);
131 #ifdef CONFIG_BOARD_EARLY_INIT_F
132 int board_early_init_f(void)
134 int uart_ids = 0; /* bit mask of which UART ids to enable */
136 #ifdef CONFIG_TEGRA2_ENABLE_UARTA
139 #ifdef CONFIG_TEGRA2_ENABLE_UARTB
142 #ifdef CONFIG_TEGRA2_ENABLE_UARTD
146 /* Initialize UART clocks */
147 clock_init_uart(uart_ids);
149 /* Initialize periph pinmuxes */
150 pin_mux_uart(uart_ids);
152 /* Initialize periph GPIOs */
153 #ifdef CONFIG_SPI_UART_SWITCH
154 gpio_early_init_uart();
160 #endif /* EARLY_INIT */