110 lines
2.1 KiB
C
110 lines
2.1 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* linux/arch/arm/mach-omap1/io.c
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*
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* OMAP1 I/O mapping code
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*/
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#include <linux/module.h>
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#include <linux/kernel.h>
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#include <linux/init.h>
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#include <linux/io.h>
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#include <linux/omap-dma.h>
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#include <asm/tlb.h>
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#include <asm/mach/map.h>
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#include "tc.h"
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#include "iomap.h"
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#include "common.h"
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/*
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* The machine specific code may provide the extra mapping besides the
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* default mapping provided here.
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*/
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static struct map_desc omap1_io_desc[] __initdata = {
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{
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.virtual = OMAP1_IO_VIRT,
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.pfn = __phys_to_pfn(OMAP1_IO_PHYS),
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.length = OMAP1_IO_SIZE,
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.type = MT_DEVICE
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}, {
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.virtual = OMAP1_DSP_BASE,
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.pfn = __phys_to_pfn(OMAP1_DSP_START),
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.length = OMAP1_DSP_SIZE,
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.type = MT_DEVICE
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}, {
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.virtual = OMAP1_DSPREG_BASE,
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.pfn = __phys_to_pfn(OMAP1_DSPREG_START),
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.length = OMAP1_DSPREG_SIZE,
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.type = MT_DEVICE
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}
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};
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/*
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* Maps common IO regions for omap1
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*/
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void __init omap1_map_io(void)
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{
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iotable_init(omap1_io_desc, ARRAY_SIZE(omap1_io_desc));
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}
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/*
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* Common low-level hardware init for omap1.
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*/
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void __init omap1_init_early(void)
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{
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omap_check_revision();
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/* REVISIT: Refer to OMAP5910 Errata, Advisory SYS_1: "Timeout Abort
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* on a Posted Write in the TIPB Bridge".
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*/
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omap_writew(0x0, MPU_PUBLIC_TIPB_CNTL);
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omap_writew(0x0, MPU_PRIVATE_TIPB_CNTL);
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}
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void __init omap1_init_late(void)
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{
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omap_serial_wakeup_init();
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}
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/*
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* NOTE: Please use ioremap + __raw_read/write where possible instead of these
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*/
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u8 omap_readb(u32 pa)
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{
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return __raw_readb(OMAP1_IO_ADDRESS(pa));
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}
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EXPORT_SYMBOL(omap_readb);
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u16 omap_readw(u32 pa)
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{
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return __raw_readw(OMAP1_IO_ADDRESS(pa));
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}
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EXPORT_SYMBOL(omap_readw);
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u32 omap_readl(u32 pa)
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{
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return __raw_readl(OMAP1_IO_ADDRESS(pa));
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}
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EXPORT_SYMBOL(omap_readl);
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void omap_writeb(u8 v, u32 pa)
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{
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__raw_writeb(v, OMAP1_IO_ADDRESS(pa));
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}
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EXPORT_SYMBOL(omap_writeb);
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void omap_writew(u16 v, u32 pa)
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{
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__raw_writew(v, OMAP1_IO_ADDRESS(pa));
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}
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EXPORT_SYMBOL(omap_writew);
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void omap_writel(u32 v, u32 pa)
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{
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__raw_writel(v, OMAP1_IO_ADDRESS(pa));
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}
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EXPORT_SYMBOL(omap_writel);
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