1 /***************************************************************************/
4 * m54xx.c -- platform support for ColdFire 54xx based boards
6 * Copyright (C) 2010, Philippe De Muyter <phdm@macqel.be>
9 /***************************************************************************/
11 #include <linux/kernel.h>
12 #include <linux/param.h>
13 #include <linux/init.h>
14 #include <linux/interrupt.h>
17 #include <linux/clk.h>
18 #include <linux/bootmem.h>
19 #include <asm/pgalloc.h>
20 #include <asm/machdep.h>
21 #include <asm/coldfire.h>
22 #include <asm/m54xxsim.h>
23 #include <asm/mcfuart.h>
24 #include <asm/mcfclk.h>
25 #include <asm/m54xxgpt.h>
27 #include <asm/mmu_context.h>
30 /***************************************************************************/
32 DEFINE_CLK(pll, "pll.0", MCF_CLK);
33 DEFINE_CLK(sys, "sys.0", MCF_BUSCLK);
34 DEFINE_CLK(mcfslt0, "mcfslt.0", MCF_BUSCLK);
35 DEFINE_CLK(mcfslt1, "mcfslt.1", MCF_BUSCLK);
36 DEFINE_CLK(mcfuart0, "mcfuart.0", MCF_BUSCLK);
37 DEFINE_CLK(mcfuart1, "mcfuart.1", MCF_BUSCLK);
38 DEFINE_CLK(mcfuart2, "mcfuart.2", MCF_BUSCLK);
39 DEFINE_CLK(mcfuart3, "mcfuart.3", MCF_BUSCLK);
41 struct clk *mcf_clks[] = {
53 /***************************************************************************/
55 static void __init m54xx_uarts_init(void)
58 __raw_writeb(MCF_PAR_PSC_TXD | MCF_PAR_PSC_RXD, MCFGPIO_PAR_PSC0);
59 __raw_writeb(MCF_PAR_PSC_TXD | MCF_PAR_PSC_RXD | MCF_PAR_PSC_RTS_RTS,
61 __raw_writeb(MCF_PAR_PSC_TXD | MCF_PAR_PSC_RXD | MCF_PAR_PSC_RTS_RTS |
62 MCF_PAR_PSC_CTS_CTS, MCFGPIO_PAR_PSC2);
63 __raw_writeb(MCF_PAR_PSC_TXD | MCF_PAR_PSC_RXD, MCFGPIO_PAR_PSC3);
66 /***************************************************************************/
68 static void mcf54xx_reset(void)
70 /* disable interrupts and enable the watchdog */
71 asm("movew #0x2700, %sr\n");
72 __raw_writel(0, MCF_GPT_GMS0);
73 __raw_writel(MCF_GPT_GCIR_CNT(1), MCF_GPT_GCIR0);
74 __raw_writel(MCF_GPT_GMS_WDEN | MCF_GPT_GMS_CE | MCF_GPT_GMS_TMS(4),
78 /***************************************************************************/
80 void __init config_BSP(char *commandp, int size)
86 mach_reset = mcf54xx_reset;
87 mach_sched_init = hw_timer_init;
91 /***************************************************************************/