Blame - arch/m68k/coldfire/m54xx.c - kernel/msm-5.4

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Philippe De Muyter	ea49f8ff	2010-09-20 13:11:11 +0200	[diff] [blame]	1	/***************************************************************************/
				2
				3	/*
Greg Ungerer	ece9ae6	2014-08-19 11:55:24 +1000	[diff] [blame]	4	* m54xx.c -- platform support for ColdFire 54xx based boards
Philippe De Muyter	ea49f8ff	2010-09-20 13:11:11 +0200	[diff] [blame]	5	*
				6	* Copyright (C) 2010, Philippe De Muyter <phdm@macqel.be>
				7	*/
				8
				9	/***************************************************************************/
				10
				11	#include <linux/kernel.h>
				12	#include <linux/param.h>
				13	#include <linux/init.h>
				14	#include <linux/interrupt.h>
				15	#include <linux/io.h>
Greg Ungerer	88be351	2011-10-14 15:06:22 +1000	[diff] [blame]	16	#include <linux/mm.h>
Greg Ungerer	98122d7	2012-07-13 16:07:15 +1000	[diff] [blame]	17	#include <linux/clk.h>
Greg Ungerer	88be351	2011-10-14 15:06:22 +1000	[diff] [blame]	18	#include <linux/bootmem.h>
				19	#include <asm/pgalloc.h>
Philippe De Muyter	ea49f8ff	2010-09-20 13:11:11 +0200	[diff] [blame]	20	#include <asm/machdep.h>
				21	#include <asm/coldfire.h>
Greg Ungerer	5b2e655	2010-11-02 12:05:29 +1000	[diff] [blame]	22	#include <asm/m54xxsim.h>
Philippe De Muyter	ea49f8ff	2010-09-20 13:11:11 +0200	[diff] [blame]	23	#include <asm/mcfuart.h>
Greg Ungerer	98122d7	2012-07-13 16:07:15 +1000	[diff] [blame]	24	#include <asm/mcfclk.h>
Greg Ungerer	5b2e655	2010-11-02 12:05:29 +1000	[diff] [blame]	25	#include <asm/m54xxgpt.h>
Greg Ungerer	88be351	2011-10-14 15:06:22 +1000	[diff] [blame]	26	#ifdef CONFIG_MMU
				27	#include <asm/mmu_context.h>
				28	#endif
Philippe De Muyter	ea49f8ff	2010-09-20 13:11:11 +0200	[diff] [blame]	29
				30	/***************************************************************************/
				31
Greg Ungerer	98122d7	2012-07-13 16:07:15 +1000	[diff] [blame]	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);
				40
				41	struct clk *mcf_clks[] = {
				42	&clk_pll,
				43	&clk_sys,
				44	&clk_mcfslt0,
				45	&clk_mcfslt1,
				46	&clk_mcfuart0,
				47	&clk_mcfuart1,
				48	&clk_mcfuart2,
				49	&clk_mcfuart3,
				50	NULL
				51	};
				52
				53	/***************************************************************************/
				54
Greg Ungerer	5b2e655	2010-11-02 12:05:29 +1000	[diff] [blame]	55	static void __init m54xx_uarts_init(void)
Philippe De Muyter	ea49f8ff	2010-09-20 13:11:11 +0200	[diff] [blame]	56	{
Greg Ungerer	b9a0c3f	2011-12-24 01:08:47 +1000	[diff] [blame]	57	/* enable io pins */
Greg Ungerer	632306f	2012-09-18 14:34:04 +1000	[diff] [blame]	58	__raw_writeb(MCF_PAR_PSC_TXD \| MCF_PAR_PSC_RXD, MCFGPIO_PAR_PSC0);
Greg Ungerer	b9a0c3f	2011-12-24 01:08:47 +1000	[diff] [blame]	59	__raw_writeb(MCF_PAR_PSC_TXD \| MCF_PAR_PSC_RXD \| MCF_PAR_PSC_RTS_RTS,
Greg Ungerer	632306f	2012-09-18 14:34:04 +1000	[diff] [blame]	60	MCFGPIO_PAR_PSC1);
Greg Ungerer	b9a0c3f	2011-12-24 01:08:47 +1000	[diff] [blame]	61	__raw_writeb(MCF_PAR_PSC_TXD \| MCF_PAR_PSC_RXD \| MCF_PAR_PSC_RTS_RTS \|
Greg Ungerer	632306f	2012-09-18 14:34:04 +1000	[diff] [blame]	62	MCF_PAR_PSC_CTS_CTS, MCFGPIO_PAR_PSC2);
				63	__raw_writeb(MCF_PAR_PSC_TXD \| MCF_PAR_PSC_RXD, MCFGPIO_PAR_PSC3);
Philippe De Muyter	ea49f8ff	2010-09-20 13:11:11 +0200	[diff] [blame]	64	}
				65
				66	/***************************************************************************/
				67
Greg Ungerer	5b2e655	2010-11-02 12:05:29 +1000	[diff] [blame]	68	static void mcf54xx_reset(void)
Philippe De Muyter	ea49f8ff	2010-09-20 13:11:11 +0200	[diff] [blame]	69	{
				70	/* disable interrupts and enable the watchdog */
				71	asm("movew #0x2700, %sr\n");
Greg Ungerer	944c3d8	2012-09-18 14:51:46 +1000	[diff] [blame]	72	__raw_writel(0, MCF_GPT_GMS0);
				73	__raw_writel(MCF_GPT_GCIR_CNT(1), MCF_GPT_GCIR0);
Philippe De Muyter	ea49f8ff	2010-09-20 13:11:11 +0200	[diff] [blame]	74	__raw_writel(MCF_GPT_GMS_WDEN \| MCF_GPT_GMS_CE \| MCF_GPT_GMS_TMS(4),
Greg Ungerer	944c3d8	2012-09-18 14:51:46 +1000	[diff] [blame]	75	MCF_GPT_GMS0);
Philippe De Muyter	ea49f8ff	2010-09-20 13:11:11 +0200	[diff] [blame]	76	}
				77
				78	/***************************************************************************/
				79
				80	void __init config_BSP(char *commandp, int size)
				81	{
Greg Ungerer	88be351	2011-10-14 15:06:22 +1000	[diff] [blame]	82	#ifdef CONFIG_MMU
Greg Ungerer	f711606	2016-08-26 14:24:27 +1000	[diff] [blame^]	83	cf_bootmem_alloc();
Greg Ungerer	88be351	2011-10-14 15:06:22 +1000	[diff] [blame]	84	mmu_context_init();
				85	#endif
Greg Ungerer	5b2e655	2010-11-02 12:05:29 +1000	[diff] [blame]	86	mach_reset = mcf54xx_reset;
Greg Ungerer	35aefb2	2012-01-23 15:34:58 +1000	[diff] [blame]	87	mach_sched_init = hw_timer_init;
Greg Ungerer	5b2e655	2010-11-02 12:05:29 +1000	[diff] [blame]	88	m54xx_uarts_init();
Philippe De Muyter	ea49f8ff	2010-09-20 13:11:11 +0200	[diff] [blame]	89	}
				90
				91	/***************************************************************************/