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/*
* (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 <asm/io.h>
#include "ap20.h"
#include <asm/arch/clock.h>
#include <asm/arch/funcmux.h>
#include <asm/arch/sys_proto.h>
#include <asm/arch/tegra2.h>
#include <asm/arch/pmc.h>
DECLARE_GLOBAL_DATA_PTR;
enum {
/* UARTs which we can enable */
UARTA = 1 << 0,
UARTB = 1 << 1,
UARTD = 1 << 3,
UART_COUNT = 4,
};
/*
* Boot ROM initializes the odmdata in APBDEV_PMC_SCRATCH20_0,
* so we are using this value to identify memory size.
*/
unsigned int query_sdram_size(void)
{
struct pmc_ctlr *const pmc = (struct pmc_ctlr *)TEGRA2_PMC_BASE;
u32 reg;
reg = readl(&pmc->pmc_scratch20);
debug("pmc->pmc_scratch20 (ODMData) = 0x%08x\n", reg);
/* bits 31:28 in OdmData are used for RAM size */
switch ((reg) >> 28) {
case 1:
return 0x10000000; /* 256 MB */
case 2:
default:
return 0x20000000; /* 512 MB */
case 3:
return 0x40000000; /* 1GB */
}
}
int dram_init(void)
{
/* We do not initialise DRAM here. We just query the size */
gd->ram_size = query_sdram_size();
return 0;
}
#ifdef CONFIG_DISPLAY_BOARDINFO
int checkboard(void)
{
printf("Board: %s\n", sysinfo.board_string);
return 0;
}
#endif /* CONFIG_DISPLAY_BOARDINFO */
#ifdef CONFIG_ARCH_CPU_INIT
/*
* Note this function is executed by the ARM7TDMI AVP. It does not return
* in this case. It is also called once the A9 starts up, but does nothing in
* that case.
*/
int arch_cpu_init(void)
{
/* Fire up the Cortex A9 */
tegra2_start();
/* We didn't do this init in start.S, so do it now */
cpu_init_cp15();
/* Initialize essential common plls */
clock_early_init();
return 0;
}
#endif
/**
* Set up the specified uarts
*
* @param uarts_ids Mask containing UARTs to init (UARTx)
*/
static void setup_uarts(int uart_ids)
{
static enum periph_id id_for_uart[] = {
PERIPH_ID_UART1,
PERIPH_ID_UART2,
PERIPH_ID_UART3,
PERIPH_ID_UART4,
};
size_t i;
for (i = 0; i < UART_COUNT; i++) {
if (uart_ids & (1 << i)) {
enum periph_id id = id_for_uart[i];
funcmux_select(id, FUNCMUX_DEFAULT);
clock_ll_start_uart(id);
}
}
}
void board_init_uart_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
setup_uarts(uart_ids);
}
#ifndef CONFIG_SYS_DCACHE_OFF
void enable_caches(void)
{
/* Enable D-cache. I-cache is already enabled in start.S */
dcache_enable();
}
#endif
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