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>
36 DECLARE_GLOBAL_DATA_PTR;
39 /* UARTs which we can enable */
45 const struct tegra2_sysinfo sysinfo = {
46 CONFIG_TEGRA2_BOARD_STRING
51 * Description: init the timestamp and lastinc value
58 static void enable_uart(enum periph_id pid)
60 /* Assert UART reset and enable clock */
61 reset_set_enable(pid, 1);
63 clock_ll_set_source(pid, 0); /* UARTx_CLK_SRC = 00, PLLP_OUT0 */
68 /* De-assert reset to UART */
69 reset_set_enable(pid, 0);
73 * Routine: clock_init_uart
74 * Description: init clock for the UART(s)
76 static void clock_init_uart(int uart_ids)
79 enable_uart(PERIPH_ID_UART1);
81 enable_uart(PERIPH_ID_UART2);
83 enable_uart(PERIPH_ID_UART4);
87 * Routine: pin_mux_uart
88 * Description: setup the pin muxes/tristate values for the UART(s)
90 static void pin_mux_uart(int uart_ids)
92 if (uart_ids & UARTA) {
93 pinmux_set_func(PINGRP_IRRX, PMUX_FUNC_UARTA);
94 pinmux_set_func(PINGRP_IRTX, PMUX_FUNC_UARTA);
95 pinmux_tristate_disable(PINGRP_IRRX);
96 pinmux_tristate_disable(PINGRP_IRTX);
98 if (uart_ids & UARTB) {
99 pinmux_set_func(PINGRP_UAD, PMUX_FUNC_IRDA);
100 pinmux_tristate_disable(PINGRP_UAD);
102 if (uart_ids & UARTD) {
103 pinmux_set_func(PINGRP_GMC, PMUX_FUNC_UARTD);
104 pinmux_tristate_disable(PINGRP_GMC);
109 * Routine: board_init
110 * Description: Early hardware init.
117 /* boot param addr */
118 gd->bd->bi_boot_params = (NV_PA_SDRAM_BASE + 0x100);
123 #ifdef CONFIG_BOARD_EARLY_INIT_F
124 int board_early_init_f(void)
126 int uart_ids = 0; /* bit mask of which UART ids to enable */
128 #ifdef CONFIG_TEGRA2_ENABLE_UARTA
131 #ifdef CONFIG_TEGRA2_ENABLE_UARTB
134 #ifdef CONFIG_TEGRA2_ENABLE_UARTD
138 /* We didn't do this init in start.S, so do it now */
141 /* Initialize essential common plls */
144 /* Initialize UART clocks */
145 clock_init_uart(uart_ids);
147 /* Initialize periph pinmuxes */
148 pin_mux_uart(uart_ids);
150 /* Initialize periph GPIOs */
154 #endif /* EARLY_INIT */