2 * arch/sh/boards/renesas/edosk7705/io.c
4 * Copyright (C) 2001 Ian da Silva, Jeremy Siegel
5 * Based largely on io_se.c.
7 * I/O routines for Hitachi EDOSK7705 board.
11 #include <linux/kernel.h>
12 #include <linux/types.h>
14 #include <asm/edosk7705/io.h>
15 #include <asm/addrspace.h>
17 #define SMC_IOADDR 0xA2000000
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))
23 /* Map the Ethernet addresses as if it is at 0x300 - 0x320 */
24 unsigned long sh_edosk7705_isa_port2addr(unsigned long port)
26 if (port >= 0x300 && port < 0x320) {
27 /* SMC91C96 registers are 4 byte aligned rather than the
30 return SMC_IOADDR + ( (port - 0x300) * 2);
33 maybebadio(sh_edosk7705_isa_port2addr, port);
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
43 unsigned char sh_edosk7705_inb(unsigned long port)
45 if (port >= 0x300 && port < 0x320 && port & 0x01) {
46 return (volatile unsigned char)(generic_inw(port -1) >> 8);
48 return *(volatile unsigned char *)sh_edosk7705_isa_port2addr(port);
51 unsigned int sh_edosk7705_inl(unsigned long port)
53 return *(volatile unsigned long *)port;
56 void sh_edosk7705_outb(unsigned char value, unsigned long port)
58 if (port >= 0x300 && port < 0x320 && port & 0x01) {
59 generic_outw(((unsigned short)value << 8), port -1);
62 *(volatile unsigned char *)sh_edosk7705_isa_port2addr(port) = value;
65 void sh_edosk7705_outl(unsigned int value, unsigned long port)
67 *(volatile unsigned long *)port = value;
70 void sh_edosk7705_insb(unsigned long port, void *addr, unsigned long count)
72 unsigned char *p = addr;
73 while (count--) *p++ = sh_edosk7705_inb(port);
76 void sh_edosk7705_insl(unsigned long port, void *addr, unsigned long count)
78 unsigned long *p = (unsigned long*)addr;
80 *p++ = *(volatile unsigned long *)port;
83 void sh_edosk7705_outsb(unsigned long port, const void *addr, unsigned long count)
85 unsigned char *p = (unsigned char*)addr;
86 while (count--) sh_edosk7705_outb(*p++, port);
89 void sh_edosk7705_outsl(unsigned long port, const void *addr, unsigned long count)
91 unsigned long *p = (unsigned long*)addr;
92 while (count--) sh_edosk7705_outl(*p++, port);