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227 lines
5.0 KiB
227 lines
5.0 KiB
20 years ago
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/* $Id: io.c,v 1.5 2004/02/22 23:08:43 kkojima Exp $
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*
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* linux/arch/sh/kernel/io_se.c
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*
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* Copyright (C) 2000 Kazumoto Kojima
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*
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* I/O routine for Hitachi SolutionEngine.
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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/se/se.h>
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/* SH pcmcia io window base, start and end. */
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int sh_pcic_io_wbase = 0xb8400000;
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int sh_pcic_io_start;
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int sh_pcic_io_stop;
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int sh_pcic_io_type;
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int sh_pcic_io_dummy;
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static inline void delay(void)
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{
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ctrl_inw(0xa0000000);
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}
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/* MS7750 requires special versions of in*, out* routines, since
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PC-like io ports are located at upper half byte of 16-bit word which
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can be accessed only with 16-bit wide. */
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static inline volatile __u16 *
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port2adr(unsigned int port)
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{
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if (port >= 0x2000)
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return (volatile __u16 *) (PA_MRSHPC + (port - 0x2000));
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else if (port >= 0x1000)
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return (volatile __u16 *) (PA_83902 + (port << 1));
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else if (sh_pcic_io_start <= port && port <= sh_pcic_io_stop)
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return (volatile __u16 *) (sh_pcic_io_wbase + (port &~ 1));
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else
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return (volatile __u16 *) (PA_SUPERIO + (port << 1));
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}
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static inline int
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shifted_port(unsigned long port)
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{
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/* For IDE registers, value is not shifted */
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if ((0x1f0 <= port && port < 0x1f8) || port == 0x3f6)
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return 0;
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else
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return 1;
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}
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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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unsigned char se_inb(unsigned long port)
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{
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if (sh_pcic_io_start <= port && port <= sh_pcic_io_stop)
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return *(__u8 *) (sh_pcic_io_wbase + 0x40000 + port);
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else if (shifted_port(port))
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return (*port2adr(port) >> 8);
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else
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return (*port2adr(port))&0xff;
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}
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unsigned char se_inb_p(unsigned long port)
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{
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unsigned long v;
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if (sh_pcic_io_start <= port && port <= sh_pcic_io_stop)
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v = *(__u8 *) (sh_pcic_io_wbase + 0x40000 + port);
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else if (shifted_port(port))
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v = (*port2adr(port) >> 8);
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else
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v = (*port2adr(port))&0xff;
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delay();
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return v;
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}
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unsigned short se_inw(unsigned long port)
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{
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if (port >= 0x2000 ||
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(sh_pcic_io_start <= port && port <= sh_pcic_io_stop))
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return *port2adr(port);
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else
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maybebadio(inw, port);
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return 0;
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}
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unsigned int se_inl(unsigned long port)
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{
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maybebadio(inl, port);
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return 0;
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}
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void se_outb(unsigned char value, unsigned long port)
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{
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if (sh_pcic_io_start <= port && port <= sh_pcic_io_stop)
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*(__u8 *)(sh_pcic_io_wbase + port) = value;
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else if (shifted_port(port))
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*(port2adr(port)) = value << 8;
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else
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*(port2adr(port)) = value;
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}
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void se_outb_p(unsigned char value, unsigned long port)
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{
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if (sh_pcic_io_start <= port && port <= sh_pcic_io_stop)
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*(__u8 *)(sh_pcic_io_wbase + port) = value;
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else if (shifted_port(port))
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*(port2adr(port)) = value << 8;
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else
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*(port2adr(port)) = value;
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delay();
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}
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void se_outw(unsigned short value, unsigned long port)
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{
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if (port >= 0x2000 ||
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(sh_pcic_io_start <= port && port <= sh_pcic_io_stop))
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*port2adr(port) = value;
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else
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maybebadio(outw, port);
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}
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void se_outl(unsigned int value, unsigned long port)
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{
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maybebadio(outl, port);
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}
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void se_insb(unsigned long port, void *addr, unsigned long count)
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{
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volatile __u16 *p = port2adr(port);
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__u8 *ap = addr;
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if (sh_pcic_io_start <= port && port <= sh_pcic_io_stop) {
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volatile __u8 *bp = (__u8 *) (sh_pcic_io_wbase + 0x40000 + port);
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while (count--)
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*ap++ = *bp;
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} else if (shifted_port(port)) {
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while (count--)
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*ap++ = *p >> 8;
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} else {
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while (count--)
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*ap++ = *p;
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}
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}
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void se_insw(unsigned long port, void *addr, unsigned long count)
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{
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volatile __u16 *p = port2adr(port);
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__u16 *ap = addr;
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while (count--)
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*ap++ = *p;
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}
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void se_insl(unsigned long port, void *addr, unsigned long count)
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{
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maybebadio(insl, port);
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}
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void se_outsb(unsigned long port, const void *addr, unsigned long count)
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{
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volatile __u16 *p = port2adr(port);
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const __u8 *ap = addr;
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if (sh_pcic_io_start <= port && port <= sh_pcic_io_stop) {
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volatile __u8 *bp = (__u8 *) (sh_pcic_io_wbase + port);
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while (count--)
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*bp = *ap++;
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} else if (shifted_port(port)) {
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while (count--)
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*p = *ap++ << 8;
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} else {
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while (count--)
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*p = *ap++;
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}
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}
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void se_outsw(unsigned long port, const void *addr, unsigned long count)
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{
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volatile __u16 *p = port2adr(port);
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const __u16 *ap = addr;
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while (count--)
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*p = *ap++;
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}
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void se_outsl(unsigned long port, const void *addr, unsigned long count)
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{
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maybebadio(outsw, port);
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}
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/* Map ISA bus address to the real address. Only for PCMCIA. */
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/* ISA page descriptor. */
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static __u32 sh_isa_memmap[256];
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static int
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sh_isa_mmap(__u32 start, __u32 length, __u32 offset)
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{
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int idx;
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if (start >= 0x100000 || (start & 0xfff) || (length != 0x1000))
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return -1;
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idx = start >> 12;
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sh_isa_memmap[idx] = 0xb8000000 + (offset &~ 0xfff);
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#if 0
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printk("sh_isa_mmap: start %x len %x offset %x (idx %x paddr %x)\n",
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start, length, offset, idx, sh_isa_memmap[idx]);
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#endif
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return 0;
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}
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unsigned long
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se_isa_port2addr(unsigned long offset)
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{
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int idx;
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idx = (offset >> 12) & 0xff;
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offset &= 0xfff;
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return sh_isa_memmap[idx] + offset;
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}
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