156 lines
2.9 KiB
C
156 lines
2.9 KiB
C
/*
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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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#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 <mach-se/mach/se.h>
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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 & 0xff000000)
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return ( volatile __u16 *) port;
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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
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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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unsigned char se_inb(unsigned long port)
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{
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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 (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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ctrl_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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return *port2adr(port);
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else
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maybebadio(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(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 (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 (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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ctrl_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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*port2adr(port) = value;
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else
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maybebadio(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(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 (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(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 (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(port);
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}
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