1da177e4c3
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
94 lines
2.6 KiB
C
94 lines
2.6 KiB
C
/*
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* arch/sh/boards/renesas/edosk7705/io.c
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*
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* Copyright (C) 2001 Ian da Silva, Jeremy Siegel
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* Based largely on io_se.c.
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*
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* I/O routines for Hitachi EDOSK7705 board.
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*
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*/
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#include <linux/kernel.h>
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#include <linux/types.h>
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#include <asm/io.h>
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#include <asm/edosk7705/io.h>
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#include <asm/addrspace.h>
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#define SMC_IOADDR 0xA2000000
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#define maybebadio(name,port) \
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printk("bad PC-like io %s for port 0x%lx at 0x%08x\n", \
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#name, (port), (__u32) __builtin_return_address(0))
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/* Map the Ethernet addresses as if it is at 0x300 - 0x320 */
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unsigned long sh_edosk7705_isa_port2addr(unsigned long port)
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{
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if (port >= 0x300 && port < 0x320) {
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/* SMC91C96 registers are 4 byte aligned rather than the
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* usual 2 byte!
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*/
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return SMC_IOADDR + ( (port - 0x300) * 2);
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}
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maybebadio(sh_edosk7705_isa_port2addr, port);
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return port;
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}
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/* Trying to read / write bytes on odd-byte boundaries to the Ethernet
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* registers causes problems. So we bit-shift the value and read / write
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* in 2 byte chunks. Setting the low byte to 0 does not cause problems
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* now as odd byte writes are only made on the bit mask / interrupt
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* register. This may not be the case in future Mar-2003 SJD
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*/
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unsigned char sh_edosk7705_inb(unsigned long port)
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{
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if (port >= 0x300 && port < 0x320 && port & 0x01) {
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return (volatile unsigned char)(generic_inw(port -1) >> 8);
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}
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return *(volatile unsigned char *)sh_edosk7705_isa_port2addr(port);
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}
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unsigned int sh_edosk7705_inl(unsigned long port)
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{
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return *(volatile unsigned long *)port;
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}
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void sh_edosk7705_outb(unsigned char value, unsigned long port)
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{
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if (port >= 0x300 && port < 0x320 && port & 0x01) {
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generic_outw(((unsigned short)value << 8), port -1);
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return;
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}
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*(volatile unsigned char *)sh_edosk7705_isa_port2addr(port) = value;
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}
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void sh_edosk7705_outl(unsigned int value, unsigned long port)
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{
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*(volatile unsigned long *)port = value;
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}
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void sh_edosk7705_insb(unsigned long port, void *addr, unsigned long count)
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{
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unsigned char *p = addr;
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while (count--) *p++ = sh_edosk7705_inb(port);
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}
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void sh_edosk7705_insl(unsigned long port, void *addr, unsigned long count)
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{
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unsigned long *p = (unsigned long*)addr;
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while (count--)
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*p++ = *(volatile unsigned long *)port;
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}
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void sh_edosk7705_outsb(unsigned long port, const void *addr, unsigned long count)
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{
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unsigned char *p = (unsigned char*)addr;
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while (count--) sh_edosk7705_outb(*p++, port);
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}
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void sh_edosk7705_outsl(unsigned long port, const void *addr, unsigned long count)
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{
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unsigned long *p = (unsigned long*)addr;
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while (count--) sh_edosk7705_outl(*p++, port);
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}
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