7fca0aa489
Including asm/hardware.h into asm/io.h can cause #define clashes between platform specific definitions and driver local definitions. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
120 lines
4.1 KiB
C
120 lines
4.1 KiB
C
/*
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* linux/include/asm-arm/arch-omap/io.h
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*
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* IO definitions for TI OMAP processors and boards
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*
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* Copied from linux/include/asm-arm/arch-sa1100/io.h
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* Copyright (C) 1997-1999 Russell King
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version.
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*
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* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
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* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
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* NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
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* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
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* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 675 Mass Ave, Cambridge, MA 02139, USA.
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*
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* Modifications:
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* 06-12-1997 RMK Created.
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* 07-04-1999 RMK Major cleanup
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*/
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#ifndef __ASM_ARM_ARCH_IO_H
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#define __ASM_ARM_ARCH_IO_H
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#include <asm/hardware.h>
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#define IO_SPACE_LIMIT 0xffffffff
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/*
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* We don't actually have real ISA nor PCI buses, but there is so many
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* drivers out there that might just work if we fake them...
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*/
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#define __io(a) ((void __iomem *)(PCIO_BASE + (a)))
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#define __mem_pci(a) (a)
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#define __mem_isa(a) (a)
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/*
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* ----------------------------------------------------------------------------
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* I/O mapping
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* ----------------------------------------------------------------------------
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*/
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#if defined(CONFIG_ARCH_OMAP1)
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#define IO_PHYS 0xFFFB0000
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#define IO_OFFSET -0x01000000 /* Virtual IO = 0xfefb0000 */
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#define IO_SIZE 0x40000
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#elif defined(CONFIG_ARCH_OMAP2)
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#define IO_PHYS 0x48000000 /* L4 peripherals; other stuff has to be mapped *
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* manually. */
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#define IO_OFFSET 0x90000000 /* Virtual IO = 0xd8000000 */
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#define IO_SIZE 0x08000000
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#endif
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#define IO_VIRT (IO_PHYS + IO_OFFSET)
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#define IO_ADDRESS(x) ((x) + IO_OFFSET)
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#define PCIO_BASE 0
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#define io_p2v(x) ((x) + IO_OFFSET)
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#define io_v2p(x) ((x) - IO_OFFSET)
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#ifndef __ASSEMBLER__
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/*
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* Functions to access the OMAP IO region
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*
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* NOTE: - Use omap_read/write[bwl] for physical register addresses
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* - Use __raw_read/write[bwl]() for virtual register addresses
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* - Use IO_ADDRESS(phys_addr) to convert registers to virtual addresses
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* - DO NOT use hardcoded virtual addresses to allow changing the
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* IO address space again if needed
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*/
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#define omap_readb(a) (*(volatile unsigned char *)IO_ADDRESS(a))
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#define omap_readw(a) (*(volatile unsigned short *)IO_ADDRESS(a))
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#define omap_readl(a) (*(volatile unsigned int *)IO_ADDRESS(a))
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#define omap_writeb(v,a) (*(volatile unsigned char *)IO_ADDRESS(a) = (v))
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#define omap_writew(v,a) (*(volatile unsigned short *)IO_ADDRESS(a) = (v))
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#define omap_writel(v,a) (*(volatile unsigned int *)IO_ADDRESS(a) = (v))
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/* 16 bit uses LDRH/STRH, base +/- offset_8 */
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typedef struct { volatile u16 offset[256]; } __regbase16;
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#define __REGV16(vaddr) ((__regbase16 *)((vaddr)&~0xff)) \
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->offset[((vaddr)&0xff)>>1]
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#define __REG16(paddr) __REGV16(io_p2v(paddr))
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/* 8/32 bit uses LDR/STR, base +/- offset_12 */
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typedef struct { volatile u8 offset[4096]; } __regbase8;
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#define __REGV8(vaddr) ((__regbase8 *)((vaddr)&~4095)) \
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->offset[((vaddr)&4095)>>0]
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#define __REG8(paddr) __REGV8(io_p2v(paddr))
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typedef struct { volatile u32 offset[4096]; } __regbase32;
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#define __REGV32(vaddr) ((__regbase32 *)((vaddr)&~4095)) \
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->offset[((vaddr)&4095)>>2]
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#define __REG32(paddr) __REGV32(io_p2v(paddr))
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extern void omap_map_common_io(void);
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#else
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#define __REG8(paddr) io_p2v(paddr)
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#define __REG16(paddr) io_p2v(paddr)
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#define __REG32(paddr) io_p2v(paddr)
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#endif
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#endif
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