io_se.c
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上传日期:2013-04-10
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文件大小:6k
- /* $Id: io_se.c,v 1.12 2001/08/11 01:23:28 jzs Exp $
- *
- * linux/arch/sh/kernel/io_se.c
- *
- * Copyright (C) 2000 Kazumoto Kojima
- *
- * I/O routine for Hitachi SolutionEngine.
- *
- */
- #include <linux/kernel.h>
- #include <linux/types.h>
- #include <asm/io.h>
- #include <asm/hitachi_se.h>
- /* SH pcmcia io window base, start and end. */
- int sh_pcic_io_wbase = 0xb8400000;
- int sh_pcic_io_start;
- int sh_pcic_io_stop;
- int sh_pcic_io_type;
- int sh_pcic_io_dummy;
- static inline void delay(void)
- {
- ctrl_inw(0xa0000000);
- }
- /* MS7750 requires special versions of in*, out* routines, since
- PC-like io ports are located at upper half byte of 16-bit word which
- can be accessed only with 16-bit wide. */
- static inline volatile __u16 *
- port2adr(unsigned int port)
- {
- if (port >= 0x2000)
- return (volatile __u16 *) (PA_MRSHPC + (port - 0x2000));
- else if (port >= 0x1000)
- return (volatile __u16 *) (PA_83902 + (port << 1));
- else if (sh_pcic_io_start <= port && port <= sh_pcic_io_stop)
- return (volatile __u16 *) (sh_pcic_io_wbase + (port &~ 1));
- else
- return (volatile __u16 *) (PA_SUPERIO + (port << 1));
- }
- static inline int
- shifted_port(unsigned long port)
- {
- /* For IDE registers, value is not shifted */
- if ((0x1f0 <= port && port < 0x1f8) || port == 0x3f6)
- return 0;
- else
- return 1;
- }
- #define maybebadio(name,port)
- printk("bad PC-like io %s for port 0x%lx at 0x%08xn",
- #name, (port), (__u32) __builtin_return_address(0))
- unsigned char se_inb(unsigned long port)
- {
- if (sh_pcic_io_start <= port && port <= sh_pcic_io_stop)
- return *(__u8 *) (sh_pcic_io_wbase + 0x40000 + port);
- else if (shifted_port(port))
- return (*port2adr(port) >> 8);
- else
- return (*port2adr(port))&0xff;
- }
- unsigned char se_inb_p(unsigned long port)
- {
- unsigned long v;
- if (sh_pcic_io_start <= port && port <= sh_pcic_io_stop)
- v = *(__u8 *) (sh_pcic_io_wbase + 0x40000 + port);
- else if (shifted_port(port))
- v = (*port2adr(port) >> 8);
- else
- v = (*port2adr(port))&0xff;
- delay();
- return v;
- }
- unsigned short se_inw(unsigned long port)
- {
- if (port >= 0x2000 ||
- (sh_pcic_io_start <= port && port <= sh_pcic_io_stop))
- return *port2adr(port);
- else
- maybebadio(inw, port);
- return 0;
- }
- unsigned int se_inl(unsigned long port)
- {
- maybebadio(inl, port);
- return 0;
- }
- void se_outb(unsigned char value, unsigned long port)
- {
- if (sh_pcic_io_start <= port && port <= sh_pcic_io_stop)
- *(__u8 *)(sh_pcic_io_wbase + port) = value;
- else if (shifted_port(port))
- *(port2adr(port)) = value << 8;
- else
- *(port2adr(port)) = value;
- }
- void se_outb_p(unsigned char value, unsigned long port)
- {
- if (sh_pcic_io_start <= port && port <= sh_pcic_io_stop)
- *(__u8 *)(sh_pcic_io_wbase + port) = value;
- else if (shifted_port(port))
- *(port2adr(port)) = value << 8;
- else
- *(port2adr(port)) = value;
- delay();
- }
- void se_outw(unsigned short value, unsigned long port)
- {
- if (port >= 0x2000 ||
- (sh_pcic_io_start <= port && port <= sh_pcic_io_stop))
- *port2adr(port) = value;
- else
- maybebadio(outw, port);
- }
- void se_outl(unsigned int value, unsigned long port)
- {
- maybebadio(outl, port);
- }
- void se_insb(unsigned long port, void *addr, unsigned long count)
- {
- volatile __u16 *p = port2adr(port);
- if (sh_pcic_io_start <= port && port <= sh_pcic_io_stop) {
- volatile __u8 *bp = (__u8 *) (sh_pcic_io_wbase + 0x40000 + port);
- while (count--)
- *((__u8 *) addr)++ = *bp;
- } else if (shifted_port(port)) {
- while (count--)
- *((__u8 *) addr)++ = *p >> 8;
- } else {
- while (count--)
- *((__u8 *) addr)++ = *p;
- }
- }
- void se_insw(unsigned long port, void *addr, unsigned long count)
- {
- volatile __u16 *p = port2adr(port);
- while (count--)
- *((__u16 *) addr)++ = *p;
- }
- void se_insl(unsigned long port, void *addr, unsigned long count)
- {
- maybebadio(insl, port);
- }
- void se_outsb(unsigned long port, const void *addr, unsigned long count)
- {
- volatile __u16 *p = port2adr(port);
- if (sh_pcic_io_start <= port && port <= sh_pcic_io_stop) {
- volatile __u8 *bp = (__u8 *) (sh_pcic_io_wbase + port);
- while (count--)
- *bp = *((__u8 *) addr)++;
- } else if (shifted_port(port)) {
- while (count--)
- *p = *((__u8 *) addr)++ << 8;
- } else {
- while (count--)
- *p = *((__u8 *) addr)++;
- }
- }
- void se_outsw(unsigned long port, const void *addr, unsigned long count)
- {
- volatile __u16 *p = port2adr(port);
- while (count--)
- *p = *((__u16 *) addr)++;
- }
- void se_outsl(unsigned long port, const void *addr, unsigned long count)
- {
- maybebadio(outsw, port);
- }
- unsigned char se_readb(unsigned long addr)
- {
- return *(volatile unsigned char*)addr;
- }
- unsigned short se_readw(unsigned long addr)
- {
- return *(volatile unsigned short*)addr;
- }
- unsigned int se_readl(unsigned long addr)
- {
- return *(volatile unsigned long*)addr;
- }
- void se_writeb(unsigned char b, unsigned long addr)
- {
- *(volatile unsigned char*)addr = b;
- }
- void se_writew(unsigned short b, unsigned long addr)
- {
- *(volatile unsigned short*)addr = b;
- }
- void se_writel(unsigned int b, unsigned long addr)
- {
- *(volatile unsigned long*)addr = b;
- }
- /* Map ISA bus address to the real address. Only for PCMCIA. */
- /* ISA page descriptor. */
- static __u32 sh_isa_memmap[256];
- static int
- sh_isa_mmap(__u32 start, __u32 length, __u32 offset)
- {
- int idx;
- if (start >= 0x100000 || (start & 0xfff) || (length != 0x1000))
- return -1;
- idx = start >> 12;
- sh_isa_memmap[idx] = 0xb8000000 + (offset &~ 0xfff);
- #if 0
- printk("sh_isa_mmap: start %x len %x offset %x (idx %x paddr %x)n",
- start, length, offset, idx, sh_isa_memmap[idx]);
- #endif
- return 0;
- }
- unsigned long
- se_isa_port2addr(unsigned long offset)
- {
- int idx;
- idx = (offset >> 12) & 0xff;
- offset &= 0xfff;
- return sh_isa_memmap[idx] + offset;
- }