mirror of
https://github.com/brain-hackers/u-boot-brain
synced 2024-08-19 00:18:51 +09:00
![Tom Warren](/assets/img/avatar_default.png)
This driver supports SPI on Tegra2, running at 48MHz. Signed-off-by: Tom Warren <twarren@nvidia.com> Acked-by: Mike Frysinger <vapier@gentoo.org>
159 lines
3.5 KiB
C
159 lines
3.5 KiB
C
/*
|
|
* (C) Copyright 2010,2011
|
|
* NVIDIA Corporation <www.nvidia.com>
|
|
*
|
|
* See file CREDITS for list of people who contributed to this
|
|
* project.
|
|
*
|
|
* This program is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU General Public License as
|
|
* published by the Free Software Foundation; either version 2 of
|
|
* the License, or (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write to the Free Software
|
|
* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
|
|
* MA 02111-1307 USA
|
|
*/
|
|
|
|
#include <common.h>
|
|
#include <ns16550.h>
|
|
#include <asm/io.h>
|
|
#include <asm/arch/tegra2.h>
|
|
#include <asm/arch/sys_proto.h>
|
|
|
|
#include <asm/arch/clk_rst.h>
|
|
#include <asm/arch/clock.h>
|
|
#include <asm/arch/pinmux.h>
|
|
#include <asm/arch/uart.h>
|
|
#include <spi.h>
|
|
#include "board.h"
|
|
|
|
DECLARE_GLOBAL_DATA_PTR;
|
|
|
|
enum {
|
|
/* UARTs which we can enable */
|
|
UARTA = 1 << 0,
|
|
UARTB = 1 << 1,
|
|
UARTD = 1 << 3,
|
|
};
|
|
|
|
const struct tegra2_sysinfo sysinfo = {
|
|
CONFIG_TEGRA2_BOARD_STRING
|
|
};
|
|
|
|
/*
|
|
* Routine: timer_init
|
|
* Description: init the timestamp and lastinc value
|
|
*/
|
|
int timer_init(void)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static void enable_uart(enum periph_id pid)
|
|
{
|
|
/* Assert UART reset and enable clock */
|
|
reset_set_enable(pid, 1);
|
|
clock_enable(pid);
|
|
clock_ll_set_source(pid, 0); /* UARTx_CLK_SRC = 00, PLLP_OUT0 */
|
|
|
|
/* wait for 2us */
|
|
udelay(2);
|
|
|
|
/* De-assert reset to UART */
|
|
reset_set_enable(pid, 0);
|
|
}
|
|
|
|
/*
|
|
* Routine: clock_init_uart
|
|
* Description: init clock for the UART(s)
|
|
*/
|
|
static void clock_init_uart(int uart_ids)
|
|
{
|
|
if (uart_ids & UARTA)
|
|
enable_uart(PERIPH_ID_UART1);
|
|
if (uart_ids & UARTB)
|
|
enable_uart(PERIPH_ID_UART2);
|
|
if (uart_ids & UARTD)
|
|
enable_uart(PERIPH_ID_UART4);
|
|
}
|
|
|
|
/*
|
|
* Routine: pin_mux_uart
|
|
* Description: setup the pin muxes/tristate values for the UART(s)
|
|
*/
|
|
static void pin_mux_uart(int uart_ids)
|
|
{
|
|
if (uart_ids & UARTA) {
|
|
pinmux_set_func(PINGRP_IRRX, PMUX_FUNC_UARTA);
|
|
pinmux_set_func(PINGRP_IRTX, PMUX_FUNC_UARTA);
|
|
pinmux_tristate_disable(PINGRP_IRRX);
|
|
pinmux_tristate_disable(PINGRP_IRTX);
|
|
}
|
|
if (uart_ids & UARTB) {
|
|
pinmux_set_func(PINGRP_UAD, PMUX_FUNC_IRDA);
|
|
pinmux_tristate_disable(PINGRP_UAD);
|
|
}
|
|
if (uart_ids & UARTD) {
|
|
pinmux_set_func(PINGRP_GMC, PMUX_FUNC_UARTD);
|
|
pinmux_tristate_disable(PINGRP_GMC);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Routine: board_init
|
|
* Description: Early hardware init.
|
|
*/
|
|
int board_init(void)
|
|
{
|
|
clock_init();
|
|
clock_verify();
|
|
|
|
#ifdef CONFIG_TEGRA2_SPI
|
|
spi_init();
|
|
#endif
|
|
/* boot param addr */
|
|
gd->bd->bi_boot_params = (NV_PA_SDRAM_BASE + 0x100);
|
|
|
|
return 0;
|
|
}
|
|
|
|
#ifdef CONFIG_BOARD_EARLY_INIT_F
|
|
int board_early_init_f(void)
|
|
{
|
|
int uart_ids = 0; /* bit mask of which UART ids to enable */
|
|
|
|
#ifdef CONFIG_TEGRA2_ENABLE_UARTA
|
|
uart_ids |= UARTA;
|
|
#endif
|
|
#ifdef CONFIG_TEGRA2_ENABLE_UARTB
|
|
uart_ids |= UARTB;
|
|
#endif
|
|
#ifdef CONFIG_TEGRA2_ENABLE_UARTD
|
|
uart_ids |= UARTD;
|
|
#endif
|
|
|
|
/* We didn't do this init in start.S, so do it now */
|
|
cpu_init_cp15();
|
|
|
|
/* Initialize essential common plls */
|
|
clock_early_init();
|
|
|
|
/* Initialize UART clocks */
|
|
clock_init_uart(uart_ids);
|
|
|
|
/* Initialize periph pinmuxes */
|
|
pin_mux_uart(uart_ids);
|
|
|
|
/* Initialize periph GPIOs */
|
|
gpio_config_uart();
|
|
return 0;
|
|
}
|
|
#endif /* EARLY_INIT */
|