tegra: Add support for UART init in cpu board.c
We add a way of initialising the selected of UARTs prior to relocation. Boards can use the board_init_uart_f() instead of repeating this code themselves. Signed-off-by: Simon Glass <sjg@chromium.org> Acked-by: Stephen Warren <swarren@nvidia.com> Signed-off-by: Tom Warren <twarren@nvidia.com>
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@ -24,12 +24,22 @@
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#include <common.h>
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#include <common.h>
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#include <asm/io.h>
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#include <asm/io.h>
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#include "ap20.h"
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#include "ap20.h"
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#include <asm/arch/clock.h>
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#include <asm/arch/funcmux.h>
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#include <asm/arch/sys_proto.h>
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#include <asm/arch/sys_proto.h>
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#include <asm/arch/tegra2.h>
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#include <asm/arch/tegra2.h>
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#include <asm/arch/pmc.h>
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#include <asm/arch/pmc.h>
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DECLARE_GLOBAL_DATA_PTR;
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DECLARE_GLOBAL_DATA_PTR;
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enum {
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/* UARTs which we can enable */
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UARTA = 1 << 0,
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UARTB = 1 << 1,
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UARTD = 1 << 3,
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UART_COUNT = 4,
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};
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/*
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/*
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* Boot ROM initializes the odmdata in APBDEV_PMC_SCRATCH20_0,
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* Boot ROM initializes the odmdata in APBDEV_PMC_SCRATCH20_0,
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* so we are using this value to identify memory size.
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* so we are using this value to identify memory size.
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@ -90,3 +100,44 @@ int arch_cpu_init(void)
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return 0;
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return 0;
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}
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}
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#endif
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#endif
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/**
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* Set up the specified uarts
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*
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* @param uarts_ids Mask containing UARTs to init (UARTx)
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*/
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static void setup_uarts(int uart_ids)
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{
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static enum periph_id id_for_uart[] = {
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PERIPH_ID_UART1,
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PERIPH_ID_UART2,
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PERIPH_ID_UART3,
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PERIPH_ID_UART4,
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};
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size_t i;
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for (i = 0; i < UART_COUNT; i++) {
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if (uart_ids & (1 << i)) {
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enum periph_id id = id_for_uart[i];
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funcmux_select(id, 0);
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clock_ll_start_uart(id);
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}
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}
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}
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void board_init_uart_f(void)
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{
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int uart_ids = 0; /* bit mask of which UART ids to enable */
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#ifdef CONFIG_TEGRA2_ENABLE_UARTA
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uart_ids |= UARTA;
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#endif
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#ifdef CONFIG_TEGRA2_ENABLE_UARTB
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uart_ids |= UARTB;
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#endif
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#ifdef CONFIG_TEGRA2_ENABLE_UARTD
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uart_ids |= UARTD;
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#endif
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setup_uarts(uart_ids);
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}
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@ -0,0 +1,30 @@
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/*
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* (C) Copyright 2010,2011
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* NVIDIA Corporation <www.nvidia.com>
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*
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* See file CREDITS for list of people who contributed to this
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* project.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
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* MA 02111-1307 USA
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*/
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#ifndef _TEGRA_BOARD_H_
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#define _TEGRA_BOARD_H_
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/* Setup UARTs for the board according to the selected config */
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void board_init_uart_f(void);
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#endif
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