arch/sh/boards/se/7206/io.c

   1 /* $Id: io.c,v 1.5 2004/02/22 23:08:43 kkojima Exp $
   2  *
   3  * linux/arch/sh/boards/se/7206/io.c
   4  *
   5  * Copyright (C) 2006 Yoshinori Sato
   6  *
   7  * I/O routine for Hitachi 7206 SolutionEngine.
   8  *
   9  */
  10
  11 #include <linux/kernel.h>
  12 #include <linux/types.h>
  13 #include <asm/io.h>
  14 #include <asm/se7206.h>
  15
  16
  17 static inline void delay(void)
  18 {
  19         ctrl_inw(0x20000000);  /* P2 ROM Area */
  20 }
  21
  22 /* MS7750 requires special versions of in*, out* routines, since
  23    PC-like io ports are located at upper half byte of 16-bit word which
  24    can be accessed only with 16-bit wide.  */
  25
  26 static inline volatile __u16 *
  27 port2adr(unsigned int port)
  28 {
  29         if (port >= 0x2000 && port < 0x2020)
  30                 return (volatile __u16 *) (PA_MRSHPC + (port - 0x2000));
  31         else if (port >= 0x300 && port < 0x310)
  32                 return (volatile __u16 *) (PA_SMSC + (port - 0x300));
  33
  34         return (volatile __u16 *)port;
  35 }
  36
  37 unsigned char se7206_inb(unsigned long port)
  38 {
  39         return (*port2adr(port)) & 0xff;
  40 }
  41
  42 unsigned char se7206_inb_p(unsigned long port)
  43 {
  44         unsigned long v;
  45
  46         v = (*port2adr(port)) & 0xff;
  47         delay();
  48         return v;
  49 }
  50
  51 unsigned short se7206_inw(unsigned long port)
  52 {
  53         return *port2adr(port);;
  54 }
  55
  56 void se7206_outb(unsigned char value, unsigned long port)
  57 {
  58         *(port2adr(port)) = value;
  59 }
  60
  61 void se7206_outb_p(unsigned char value, unsigned long port)
  62 {
  63         *(port2adr(port)) = value;
  64         delay();
  65 }
  66
  67 void se7206_outw(unsigned short value, unsigned long port)
  68 {
  69         *port2adr(port) = value;
  70 }
  71
  72 void se7206_insb(unsigned long port, void *addr, unsigned long count)
  73 {
  74         volatile __u16 *p = port2adr(port);
  75         __u8 *ap = addr;
  76
  77         while (count--)
  78                 *ap++ = *p;
  79 }
  80
  81 void se7206_insw(unsigned long port, void *addr, unsigned long count)
  82 {
  83         volatile __u16 *p = port2adr(port);
  84         __u16 *ap = addr;
  85         while (count--)
  86                 *ap++ = *p;
  87 }
  88
  89 void se7206_outsb(unsigned long port, const void *addr, unsigned long count)
  90 {
  91         volatile __u16 *p = port2adr(port);
  92         const __u8 *ap = addr;
  93
  94         while (count--)
  95                 *p = *ap++;
  96 }
  97
  98 void se7206_outsw(unsigned long port, const void *addr, unsigned long count)
  99 {
 100         volatile __u16 *p = port2adr(port);
 101         const __u16 *ap = addr;
 102         while (count--)
 103                 *p = *ap++;
 104 }