/*
* linux/arch/sh/boards/superh/microdev/io.c
*
* Copyright (C) 2003 Sean McGoogan (Sean.McGoogan@superh.com)
* Copyright (C) 2003, 2004 SuperH, Inc.
* Copyright (C) 2004 Paul Mundt
*
* SuperH SH4-202 MicroDev board support.
*
* May be copied or modified under the terms of the GNU General Public
* License. See linux/COPYING for more information.
*/
#include <linux/init.h>
#include <linux/pci.h>
#include <linux/wait.h>
#include <asm/io.h>
#include <asm/microdev.h>
/*
* we need to have a 'safe' address to re-direct all I/O requests
* that we do not explicitly wish to handle. This safe address
* must have the following properies:
*
* * writes are ignored (no exception)
* * reads are benign (no side-effects)
* * accesses of width 1, 2 and 4-bytes are all valid.
*
* The Processor Version Register (PVR) has these properties.
*/
#define PVR 0xff000030 /* Processor Version Register */
#define IO_IDE2_BASE 0x170ul /* I/O base for SMSC FDC37C93xAPM IDE #2 */
#define IO_IDE1_BASE 0x1f0ul /* I/O base for SMSC FDC37C93xAPM IDE #1 */
#define IO_ISP1161_BASE 0x290ul /* I/O port for Philips ISP1161x USB chip */
#define IO_SERIAL2_BASE 0x2f8ul /* I/O base for SMSC FDC37C93xAPM Serial #2 */
#define IO_LAN91C111_BASE 0x300ul /* I/O base for SMSC LAN91C111 Ethernet chip */
#define IO_IDE2_MISC 0x376ul /* I/O misc for SMSC FDC37C93xAPM IDE #2 */
#define IO_SUPERIO_BASE 0x3f0ul /* I/O base for SMSC FDC37C93xAPM SuperIO chip */
#define IO_IDE1_MISC 0x3f6ul /* I/O misc for SMSC FDC37C93xAPM IDE #1 */
#define IO_SERIAL1_BASE 0x3f8ul /* I/O base for SMSC FDC37C93xAPM Serial #1 */
#define IO_ISP1161_EXTENT 0x04ul /* I/O extent for Philips ISP1161x USB chip */
#define IO_LAN91C111_EXTENT 0x10ul /* I/O extent for SMSC LAN91C111 Ethernet chip */
#define IO_SUPERIO_EXTENT 0x02ul /* I/O extent for SMSC FDC37C93xAPM SuperIO chip */
#define IO_IDE_EXTENT 0x08ul /* I/O extent for IDE Task Register set */
#define IO_SERIAL_EXTENT 0x10ul
#define IO_LAN91C111_PHYS 0xa7500000ul /* Physical address of SMSC LAN91C111 Ethernet chip */
#define IO_ISP1161_PHYS 0xa7700000ul /* Physical address of Philips ISP1161x USB chip */
#define IO_SUPERIO_PHYS 0xa7800000ul /* Physical address of SMSC FDC37C93xAPM SuperIO chip */
/*
* map I/O ports to memory-mapped addresses
*/
static unsigned long microdev_isa_port2addr(unsigned long offset)
{
unsigned long result;
if ((offset >= IO_LAN91C111_BASE) &&
(offset < IO_LAN91C111_BASE + IO_LAN91C111_EXTENT)) {
/*
* SMSC LAN91C111 Ethernet chip
*/
result = IO_LAN91C111_PHYS + offset - IO_LAN91C111_BASE;
} else if ((offset >= IO_SUPERIO_BASE) &&
(offset < IO_SUPERIO_BASE + IO_SUPERIO_EXTENT)) {
/*
* SMSC FDC37C93xAPM SuperIO chip
*
* Configuration Registers
*/
result = IO_SUPERIO_PHYS + (offset << 1);
#if 0
} else if (offset == KBD_DATA_REG || offset == KBD_CNTL_REG ||
offset == KBD_STATUS_REG) {
/*
* SMSC FDC37C93xAPM SuperIO chip
*
* PS/2 Keyboard + Mouse (ports 0x60 and 0x64).
*/
result = IO_SUPERIO_PHYS + (offset << 1);
#endif
} else if (((offset >= IO_IDE1_BASE) &&
(offset < IO_IDE1_BASE + IO_IDE_EXTENT)) ||
(offset == IO_IDE1_MISC)) {
/*
* SMSC FDC37C93xAPM SuperIO chip
*
* IDE #1
*/
result = IO_SUPERIO_PHYS + (offset << 1);
} else if (((offset >= IO_IDE2_BASE) &&
(offset < IO_IDE2_BASE + IO_IDE_EXTENT)) ||
(offset == IO_IDE2_MISC)) {
/*
* SMSC FDC37C93xAPM SuperIO chip
*
* IDE #2
*/
result = IO_SUPERIO_PHYS + (offset << 1);
} else if ((offset >= IO_SERIAL1_BASE) &&
(offset < IO_SERIAL1_BASE + IO_SERIAL_EXTENT)) {
/*
* SMSC FDC37C93xAPM SuperIO chip
*
* Serial #1
*/
result = IO_SUPERIO_PHYS + (offset << 1);
} else if ((offset >= IO_SERIAL2_BASE) &&
(offset < IO_SERIAL2_BASE + IO_SERIAL_EXTENT)) {
/*
* SMSC FDC37C93xAPM SuperIO chip
*
* Serial #2
*/
result = IO_SUPERIO_PHYS + (offset << 1);
} else if ((offset >= IO_ISP1161_BASE) &&
(offset < IO_ISP1161_BASE + IO_ISP1161_EXTENT)) {
/*
* Philips USB ISP1161x chip
*/
result = IO_ISP1161_PHYS + offset - IO_ISP1161_BASE;
} else {
/*
* safe default.
*/
printk("Warning: unexpected port in %s( offset = 0x%lx )\n",
__FUNCTION__, offset);
result = PVR;
}
return result;
}
#define PORT2ADDR(x) (microdev_isa_port2addr(x))
static inline void delay(void)
{
#if defined(CONFIG_PCI)
/* System board present, just make a dummy SRAM access. (CS0 will be
mapped to PCI memory, probably good to avoid it.) */
ctrl_inw(0xa6800000);
#else
/* CS0 will be mapped to flash, ROM etc so safe to access it. */
ctrl_inw(0xa0000000);
#endif
}
unsigned char microdev_inb(unsigned long port)
{
#ifdef CONFIG_PCI
if (port >= PCIBIOS_MIN_IO)
return microdev_pci_inb(port);
#endif
return *(volatile unsigned char*)PORT2ADDR(port);
}
unsigned short microdev_inw(unsigned long port)
{
#ifdef CONFIG_PCI
if (port >= PCIBIOS_MIN_IO)
return microdev_pci_inw(port);
#endif
return *(volatile unsigned short*)PORT2ADDR(port);
}
unsigned int microdev_inl(unsigned long port)
{
#ifdef CONFIG_PCI
if (port >= PCIBIOS_MIN_IO)
return microdev_pci_inl(port);
#endif
return *(volatile unsigned int*)PORT2ADDR(port);
}
void microdev_outw(unsigned short b, unsigned long port)
{
#ifdef CONFIG_PCI
if (port >= PCIBIOS_MIN_IO) {
microdev_pci_outw(b, port);
return;
}
#endif
*(volatile unsigned short*)PORT2ADDR(port) = b;
}
void microdev_outb(unsigned char b, unsigned long port)
{
#ifdef CONFIG_PCI
if (port >= PCIBIOS_MIN_IO) {
microdev_pci_outb(b, port);
return;
}
#endif
/*
* There is a board feature with the current SH4-202 MicroDev in
* that the 2 byte enables (nBE0 and nBE1) are tied together (and
* to the Chip Select Line (Ethernet_CS)). Due to this connectivity,
* it is not possible to safely perform 8-bit writes to the
* Ethernet registers, as 16-bits will be consumed from the Data
* lines (corrupting the other byte). Hence, this function is
* written to implement 16-bit read/modify/write for all byte-wide
* accesses.
*
* Note: there is no problem with byte READS (even or odd).
*
* Sean McGoogan - 16th June 2003.
*/
if ((port >= IO_LAN91C111_BASE) &&
(port < IO_LAN91C111_BASE + IO_LAN91C111_EXTENT)) {
/*
* Then are trying to perform a byte-write to the
* LAN91C111. This needs special care.
*/
if (port % 2 == 1) { /* is the port odd ? */
/* unset bit-0, i.e. make even */
const unsigned long evenPort = port-1;
unsigned short word;
/*
* do a 16-bit read/write to write to 'port',
* preserving even byte.
*
* Even addresses are bits 0-7
* Odd addresses are bits 8-15
*/
word = microdev_inw(evenPort);
word = (word & 0xffu) | (b << 8);
microdev_outw(word, evenPort);
} else {
/* else, we are trying to do an even byte write */
unsigned short word;
/*
* do a 16-bit read/write to write to 'port',
* preserving odd byte.
*
* Even addresses are bits 0-7
* Odd addresses are bits 8-15
*/
word = microdev_inw(port);
word = (word & 0xff00u) | (b);
microdev_outw(word, port);
}
} else {
*(volatile unsigned char*)PORT2ADDR(port) = b;
}
}
void microdev_outl(unsigned int b, unsigned long port)
{
#ifdef CONFIG_PCI
if (port >= PCIBIOS_MIN_IO) {
microdev_pci_outl(b, port);
return;
}
#endif
*(volatile unsigned int*)PORT2ADDR(port) = b;
}
unsigned char microdev_inb_p(unsigned long port)
{
unsigned char v = microdev_inb(port);
delay();
return v;
}
unsigned short microdev_inw_p(unsigned long port)
{
unsigned short v = microdev_inw(port);
delay();
return v;
}
unsigned int microdev_inl_p(unsigned long port)
{
unsigned int v = microdev_inl(port);
delay();
return v;
}
void microdev_outb_p(unsigned char b, unsigned long port)
{
microdev_outb(b, port);
delay();
}
void microdev_outw_p(unsigned short b, unsigned long port)
{
microdev_outw(b, port);
delay();
}
void microdev_outl_p(unsigned int b, unsigned long port)
{
microdev_outl(b, port);
delay();
}
void microdev_insb(unsigned long port, void *buffer, unsigned long count)
{
volatile unsigned char *port_addr;
unsigned char *buf = buffer;
port_addr = (volatile unsigned char *)PORT2ADDR(port);
while (count--)
*buf++ = *port_addr;
}
void microdev_insw(unsigned long port, void *buffer, unsigned long count)
{
volatile unsigned short *port_addr;
unsigned short *buf = buffer;
port_addr = (volatile unsigned short *)PORT2ADDR(port);
while (count--)
*buf++ = *port_addr;
}
void microdev_insl(unsigned long port, void *buffer, unsigned long count)
{
volatile unsigned long *port_addr;
unsigned int *buf = buffer;
port_addr = (volatile unsigned long *)PORT2ADDR(port);
while (count--)
*buf++ = *port_addr;
}
void microdev_outsb(unsigned long port, const void *buffer, unsigned long count)
{
volatile unsigned char *port_addr;
const unsigned char *buf = buffer;
port_addr = (volatile unsigned char *)PORT2ADDR(port);
while (count--)
*port_addr = *buf++;
}
void microdev_outsw(unsigned long port, const void *buffer, unsigned long count)
{
volatile unsigned short *port_addr;
const unsigned short *buf = buffer;
port_addr = (volatile unsigned short *)PORT2ADDR(port);
while (count--)
*port_addr = *buf++;
}
void microdev_outsl(unsigned long port, const void *buffer, unsigned long count)
{
volatile unsigned long *port_addr;
const unsigned int *buf = buffer;
port_addr = (volatile unsigned long *)PORT2ADDR(port);
while (count--)
*port_addr = *buf++;
}
