arch/sh/boards/renesas/edosk7705/io.c

   1 /*
   2  * arch/sh/boards/renesas/edosk7705/io.c
   3  *
   4  * Copyright (C) 2001  Ian da Silva, Jeremy Siegel
   5  * Based largely on io_se.c.
   6  *
   7  * I/O routines for Hitachi EDOSK7705 board.
   8  *
   9  */
  10
  11 #include <linux/kernel.h>
  12 #include <linux/types.h>
  13 #include <asm/io.h>
  14 #include <asm/edosk7705/io.h>
  15 #include <asm/addrspace.h>
  16
  17 #define SMC_IOADDR      0xA2000000
  18
  19 #define maybebadio(name,port) \
  20   printk("bad PC-like io %s for port 0x%lx at 0x%08x\n", \
  21          #name, (port), (__u32) __builtin_return_address(0))
  22
  23 /* Map the Ethernet addresses as if it is at 0x300 - 0x320 */
  24 unsigned long sh_edosk7705_isa_port2addr(unsigned long port)
  25 {
  26      if (port >= 0x300 && port < 0x320) {
  27           /* SMC91C96 registers are 4 byte aligned rather than the
  28            * usual 2 byte!
  29            */
  30           return SMC_IOADDR + ( (port - 0x300) * 2);
  31      }
  32
  33      maybebadio(sh_edosk7705_isa_port2addr, port);
  34      return port;
  35 }
  36
  37 /* Trying to read / write bytes on odd-byte boundaries to the Ethernet
  38  * registers causes problems. So we bit-shift the value and read / write
  39  * in 2 byte chunks. Setting the low byte to 0 does not cause problems
  40  * now as odd byte writes are only made on the bit mask / interrupt
  41  * register. This may not be the case in future Mar-2003 SJD
  42  */
  43 unsigned char sh_edosk7705_inb(unsigned long port)
  44 {
  45         if (port >= 0x300 && port < 0x320 && port & 0x01) {
  46                 return (volatile unsigned char)(generic_inw(port -1) >> 8);
  47         }
  48         return *(volatile unsigned char *)sh_edosk7705_isa_port2addr(port);
  49 }
  50
  51 unsigned int sh_edosk7705_inl(unsigned long port)
  52 {
  53         return *(volatile unsigned long *)port;
  54 }
  55
  56 void sh_edosk7705_outb(unsigned char value, unsigned long port)
  57 {
  58         if (port >= 0x300 && port < 0x320 && port & 0x01) {
  59                 generic_outw(((unsigned short)value << 8), port -1);
  60                 return;
  61         }
  62         *(volatile unsigned char *)sh_edosk7705_isa_port2addr(port) = value;
  63 }
  64
  65 void sh_edosk7705_outl(unsigned int value, unsigned long port)
  66 {
  67         *(volatile unsigned long *)port = value;
  68 }
  69
  70 void sh_edosk7705_insb(unsigned long port, void *addr, unsigned long count)
  71 {
  72         unsigned char *p = addr;
  73         while (count--) *p++ = sh_edosk7705_inb(port);
  74 }
  75
  76 void sh_edosk7705_insl(unsigned long port, void *addr, unsigned long count)
  77 {
  78         unsigned long *p = (unsigned long*)addr;
  79         while (count--)
  80                 *p++ = *(volatile unsigned long *)port;
  81 }
  82
  83 void sh_edosk7705_outsb(unsigned long port, const void *addr, unsigned long count)
  84 {
  85         unsigned char *p = (unsigned char*)addr;
  86         while (count--) sh_edosk7705_outb(*p++, port);
  87 }
  88
  89 void sh_edosk7705_outsl(unsigned long port, const void *addr, unsigned long count)
  90 {
  91         unsigned long *p = (unsigned long*)addr;
  92         while (count--) sh_edosk7705_outl(*p++, port);
  93 }
  94