92 lines
2.5 KiB
C
92 lines
2.5 KiB
C
/***************************************************************************/
|
|
|
|
/*
|
|
* m54xx.c -- platform support for ColdFire 54xx based boards
|
|
*
|
|
* Copyright (C) 2010, Philippe De Muyter <phdm@macqel.be>
|
|
*/
|
|
|
|
/***************************************************************************/
|
|
|
|
#include <linux/kernel.h>
|
|
#include <linux/param.h>
|
|
#include <linux/init.h>
|
|
#include <linux/interrupt.h>
|
|
#include <linux/io.h>
|
|
#include <linux/mm.h>
|
|
#include <linux/clk.h>
|
|
#include <linux/bootmem.h>
|
|
#include <asm/pgalloc.h>
|
|
#include <asm/machdep.h>
|
|
#include <asm/coldfire.h>
|
|
#include <asm/m54xxsim.h>
|
|
#include <asm/mcfuart.h>
|
|
#include <asm/mcfclk.h>
|
|
#include <asm/m54xxgpt.h>
|
|
#ifdef CONFIG_MMU
|
|
#include <asm/mmu_context.h>
|
|
#endif
|
|
|
|
/***************************************************************************/
|
|
|
|
DEFINE_CLK(pll, "pll.0", MCF_CLK);
|
|
DEFINE_CLK(sys, "sys.0", MCF_BUSCLK);
|
|
DEFINE_CLK(mcfslt0, "mcfslt.0", MCF_BUSCLK);
|
|
DEFINE_CLK(mcfslt1, "mcfslt.1", MCF_BUSCLK);
|
|
DEFINE_CLK(mcfuart0, "mcfuart.0", MCF_BUSCLK);
|
|
DEFINE_CLK(mcfuart1, "mcfuart.1", MCF_BUSCLK);
|
|
DEFINE_CLK(mcfuart2, "mcfuart.2", MCF_BUSCLK);
|
|
DEFINE_CLK(mcfuart3, "mcfuart.3", MCF_BUSCLK);
|
|
|
|
struct clk *mcf_clks[] = {
|
|
&clk_pll,
|
|
&clk_sys,
|
|
&clk_mcfslt0,
|
|
&clk_mcfslt1,
|
|
&clk_mcfuart0,
|
|
&clk_mcfuart1,
|
|
&clk_mcfuart2,
|
|
&clk_mcfuart3,
|
|
NULL
|
|
};
|
|
|
|
/***************************************************************************/
|
|
|
|
static void __init m54xx_uarts_init(void)
|
|
{
|
|
/* enable io pins */
|
|
__raw_writeb(MCF_PAR_PSC_TXD | MCF_PAR_PSC_RXD, MCFGPIO_PAR_PSC0);
|
|
__raw_writeb(MCF_PAR_PSC_TXD | MCF_PAR_PSC_RXD | MCF_PAR_PSC_RTS_RTS,
|
|
MCFGPIO_PAR_PSC1);
|
|
__raw_writeb(MCF_PAR_PSC_TXD | MCF_PAR_PSC_RXD | MCF_PAR_PSC_RTS_RTS |
|
|
MCF_PAR_PSC_CTS_CTS, MCFGPIO_PAR_PSC2);
|
|
__raw_writeb(MCF_PAR_PSC_TXD | MCF_PAR_PSC_RXD, MCFGPIO_PAR_PSC3);
|
|
}
|
|
|
|
/***************************************************************************/
|
|
|
|
static void mcf54xx_reset(void)
|
|
{
|
|
/* disable interrupts and enable the watchdog */
|
|
asm("movew #0x2700, %sr\n");
|
|
__raw_writel(0, MCF_GPT_GMS0);
|
|
__raw_writel(MCF_GPT_GCIR_CNT(1), MCF_GPT_GCIR0);
|
|
__raw_writel(MCF_GPT_GMS_WDEN | MCF_GPT_GMS_CE | MCF_GPT_GMS_TMS(4),
|
|
MCF_GPT_GMS0);
|
|
}
|
|
|
|
/***************************************************************************/
|
|
|
|
void __init config_BSP(char *commandp, int size)
|
|
{
|
|
#ifdef CONFIG_MMU
|
|
cf_bootmem_alloc();
|
|
mmu_context_init();
|
|
#endif
|
|
mach_reset = mcf54xx_reset;
|
|
mach_sched_init = hw_timer_init;
|
|
m54xx_uarts_init();
|
|
}
|
|
|
|
/***************************************************************************/
|