diff options
author | Greg Ungerer <gerg@uclinux.org> | 2014-08-19 11:39:09 +1000 |
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committer | Greg Ungerer <gerg@uclinux.org> | 2014-09-29 09:18:34 +1000 |
commit | f86b9e03837beafb4b48d53a76ee4b88559226de (patch) | |
tree | 53a673c3719aec83c6c55c265ed6e6433d6550ca /arch/m68k/coldfire/m54xx.c | |
parent | fe82dcec644244676d55a1384c958d5f67979adb (diff) | |
download | linux-next-f86b9e03837beafb4b48d53a76ee4b88559226de.tar.gz |
m68k: move coldfire platform code
Move the m68k ColdFire platform support code directory to be with the
existing m68k platforms. Although the ColdFire is not a platform as such,
we have always kept all its support together. No reason to change that
as this time.
Signed-off-by: Greg Ungerer <gerg@uclinux.org>
Acked-by: Geert Uytterhoeven <geert@linux-m68k.org>
Diffstat (limited to 'arch/m68k/coldfire/m54xx.c')
-rw-r--r-- | arch/m68k/coldfire/m54xx.c | 129 |
1 files changed, 129 insertions, 0 deletions
diff --git a/arch/m68k/coldfire/m54xx.c b/arch/m68k/coldfire/m54xx.c new file mode 100644 index 000000000000..952da53aa0bc --- /dev/null +++ b/arch/m68k/coldfire/m54xx.c @@ -0,0 +1,129 @@ +/***************************************************************************/ + +/* + * linux/arch/m68knommu/platform/54xx/config.c + * + * 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> +#include <asm/mcfclk.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); +} + +/***************************************************************************/ + +#ifdef CONFIG_MMU + +unsigned long num_pages; + +static void __init mcf54xx_bootmem_alloc(void) +{ + unsigned long start_pfn; + unsigned long memstart; + + /* _rambase and _ramend will be naturally page aligned */ + m68k_memory[0].addr = _rambase; + m68k_memory[0].size = _ramend - _rambase; + + /* compute total pages in system */ + num_pages = (_ramend - _rambase) >> PAGE_SHIFT; + + /* page numbers */ + memstart = PAGE_ALIGN(_ramstart); + min_low_pfn = _rambase >> PAGE_SHIFT; + start_pfn = memstart >> PAGE_SHIFT; + max_low_pfn = _ramend >> PAGE_SHIFT; + high_memory = (void *)_ramend; + + m68k_virt_to_node_shift = fls(_ramend - _rambase - 1) - 6; + module_fixup(NULL, __start_fixup, __stop_fixup); + + /* setup bootmem data */ + m68k_setup_node(0); + memstart += init_bootmem_node(NODE_DATA(0), start_pfn, + min_low_pfn, max_low_pfn); + free_bootmem_node(NODE_DATA(0), memstart, _ramend - memstart); +} + +#endif /* CONFIG_MMU */ + +/***************************************************************************/ + +void __init config_BSP(char *commandp, int size) +{ +#ifdef CONFIG_MMU + mcf54xx_bootmem_alloc(); + mmu_context_init(); +#endif + mach_reset = mcf54xx_reset; + mach_sched_init = hw_timer_init; + m54xx_uarts_init(); +} + +/***************************************************************************/ |