129 lines
2.9 KiB
C
129 lines
2.9 KiB
C
/*
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*
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* Common functions for OMAP4 based boards
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*
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* (C) Copyright 2010
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* Texas Instruments, <www.ti.com>
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*
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* Author :
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* Aneesh V <aneesh@ti.com>
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* Steve Sakoman <steve@sakoman.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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#include <common.h>
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#include <asm/arch/cpu.h>
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#include <asm/arch/sys_proto.h>
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#include <asm/sizes.h>
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/*
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* Routine: s_init
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* Description: Does early system init of muxing and clocks.
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* - Called path is with SRAM stack.
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*/
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void s_init(void)
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{
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watchdog_init();
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}
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/*
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* Routine: wait_for_command_complete
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* Description: Wait for posting to finish on watchdog
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*/
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void wait_for_command_complete(struct watchdog *wd_base)
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{
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int pending = 1;
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do {
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pending = readl(&wd_base->wwps);
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} while (pending);
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}
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/*
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* Routine: watchdog_init
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* Description: Shut down watch dogs
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*/
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void watchdog_init(void)
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{
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struct watchdog *wd2_base = (struct watchdog *)WDT2_BASE;
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writel(WD_UNLOCK1, &wd2_base->wspr);
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wait_for_command_complete(wd2_base);
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writel(WD_UNLOCK2, &wd2_base->wspr);
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}
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/*
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* This function finds the SDRAM size available in the system
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* based on DMM section configurations
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* This is needed because the size of memory installed may be
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* different on different versions of the board
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*/
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u32 sdram_size(void)
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{
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u32 section, i, total_size = 0, size, addr;
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for (i = 0; i < 4; i++) {
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section = __raw_readl(DMM_LISA_MAP_BASE + i*4);
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addr = section & DMM_LISA_MAP_SYS_ADDR_MASK;
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/* See if the address is valid */
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if ((addr >= OMAP44XX_DRAM_ADDR_SPACE_START) &&
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(addr < OMAP44XX_DRAM_ADDR_SPACE_END)) {
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size = ((section & DMM_LISA_MAP_SYS_SIZE_MASK) >>
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DMM_LISA_MAP_SYS_SIZE_SHIFT);
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size = 1 << size;
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size *= SZ_16M;
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total_size += size;
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}
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}
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return total_size;
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}
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/*
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* Routine: dram_init
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* Description: sets uboots idea of sdram size
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*/
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int dram_init(void)
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{
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DECLARE_GLOBAL_DATA_PTR;
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gd->ram_size = sdram_size();
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return 0;
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}
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/*
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* Print board information
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*/
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int checkboard(void)
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{
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puts(sysinfo.board_string);
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return 0;
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}
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/*
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* This function is called by start_armboot. You can reliably use static
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* data. Any boot-time function that require static data should be
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* called from here
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*/
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int arch_cpu_init(void)
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{
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set_muxconf_regs();
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return 0;
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}
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