1/*
  2 * linux/arch/sh/boards/superh/microdev/io.c
  3 *
  4 * Copyright (C) 2003 Sean McGoogan (Sean.McGoogan@superh.com)
  5 * Copyright (C) 2003, 2004 SuperH, Inc.
  6 * Copyright (C) 2004 Paul Mundt
  7 *
  8 * SuperH SH4-202 MicroDev board support.
  9 *
 10 * May be copied or modified under the terms of the GNU General Public
 11 * License.  See linux/COPYING for more information.
 12 */
 13
 14#include <linux/init.h>
 15#include <linux/pci.h>
 16#include <linux/wait.h>
 17#include <asm/io.h>
 18#include <mach/microdev.h>
 19
 20	/*
 21	 *	we need to have a 'safe' address to re-direct all I/O requests
 22	 *	that we do not explicitly wish to handle. This safe address
 23	 *	must have the following properies:
 24	 *
 25	 *		* writes are ignored (no exception)
 26	 *		* reads are benign (no side-effects)
 27	 *		* accesses of width 1, 2 and 4-bytes are all valid.
 28	 *
 29	 *	The Processor Version Register (PVR) has these properties.
 30	 */
 31#define	PVR	0xff000030	/* Processor Version Register */
 32
 33
 34#define	IO_IDE2_BASE		0x170ul	/* I/O base for SMSC FDC37C93xAPM IDE #2 */
 35#define	IO_IDE1_BASE		0x1f0ul	/* I/O base for SMSC FDC37C93xAPM IDE #1 */
 36#define IO_ISP1161_BASE		0x290ul /* I/O port for Philips ISP1161x USB chip */
 37#define IO_SERIAL2_BASE		0x2f8ul /* I/O base for SMSC FDC37C93xAPM Serial #2 */
 38#define	IO_LAN91C111_BASE	0x300ul	/* I/O base for SMSC LAN91C111 Ethernet chip */
 39#define	IO_IDE2_MISC		0x376ul	/* I/O misc for SMSC FDC37C93xAPM IDE #2 */
 40#define IO_SUPERIO_BASE		0x3f0ul /* I/O base for SMSC FDC37C93xAPM SuperIO chip */
 41#define	IO_IDE1_MISC		0x3f6ul	/* I/O misc for SMSC FDC37C93xAPM IDE #1 */
 42#define IO_SERIAL1_BASE		0x3f8ul /* I/O base for SMSC FDC37C93xAPM Serial #1 */
 43
 44#define	IO_ISP1161_EXTENT	0x04ul	/* I/O extent for Philips ISP1161x USB chip */
 45#define	IO_LAN91C111_EXTENT	0x10ul	/* I/O extent for SMSC LAN91C111 Ethernet chip */
 46#define	IO_SUPERIO_EXTENT	0x02ul	/* I/O extent for SMSC FDC37C93xAPM SuperIO chip */
 47#define	IO_IDE_EXTENT		0x08ul	/* I/O extent for IDE Task Register set */
 48#define IO_SERIAL_EXTENT	0x10ul
 49
 50#define	IO_LAN91C111_PHYS	0xa7500000ul	/* Physical address of SMSC LAN91C111 Ethernet chip */
 51#define	IO_ISP1161_PHYS		0xa7700000ul	/* Physical address of Philips ISP1161x USB chip */
 52#define	IO_SUPERIO_PHYS		0xa7800000ul	/* Physical address of SMSC FDC37C93xAPM SuperIO chip */
 53
 54/*
 55 * map I/O ports to memory-mapped addresses
 56 */
 57void __iomem *microdev_ioport_map(unsigned long offset, unsigned int len)
 58{
 59	unsigned long result;
 60
 61	if ((offset >= IO_LAN91C111_BASE) &&
 62	    (offset <  IO_LAN91C111_BASE + IO_LAN91C111_EXTENT)) {
 63			/*
 64			 *	SMSC LAN91C111 Ethernet chip
 65			 */
 66		result = IO_LAN91C111_PHYS + offset - IO_LAN91C111_BASE;
 67	} else if ((offset >= IO_SUPERIO_BASE) &&
 68		   (offset <  IO_SUPERIO_BASE + IO_SUPERIO_EXTENT)) {
 69			/*
 70			 *	SMSC FDC37C93xAPM SuperIO chip
 71			 *
 72			 *	Configuration Registers
 73			 */
 74		result = IO_SUPERIO_PHYS + (offset << 1);
 75	} else if (((offset >= IO_IDE1_BASE) &&
 76		    (offset <  IO_IDE1_BASE + IO_IDE_EXTENT)) ||
 77		    (offset == IO_IDE1_MISC)) {
 78			/*
 79			 *	SMSC FDC37C93xAPM SuperIO chip
 80			 *
 81			 *	IDE #1
 82			 */
 83	        result = IO_SUPERIO_PHYS + (offset << 1);
 84	} else if (((offset >= IO_IDE2_BASE) &&
 85		    (offset <  IO_IDE2_BASE + IO_IDE_EXTENT)) ||
 86		    (offset == IO_IDE2_MISC)) {
 87			/*
 88			 *	SMSC FDC37C93xAPM SuperIO chip
 89			 *
 90			 *	IDE #2
 91			 */
 92	        result = IO_SUPERIO_PHYS + (offset << 1);
 93	} else if ((offset >= IO_SERIAL1_BASE) &&
 94		   (offset <  IO_SERIAL1_BASE + IO_SERIAL_EXTENT)) {
 95			/*
 96			 *	SMSC FDC37C93xAPM SuperIO chip
 97			 *
 98			 *	Serial #1
 99			 */
100		result = IO_SUPERIO_PHYS + (offset << 1);
101	} else if ((offset >= IO_SERIAL2_BASE) &&
102		   (offset <  IO_SERIAL2_BASE + IO_SERIAL_EXTENT)) {
103			/*
104			 *	SMSC FDC37C93xAPM SuperIO chip
105			 *
106			 *	Serial #2
107			 */
108		result = IO_SUPERIO_PHYS + (offset << 1);
109	} else if ((offset >= IO_ISP1161_BASE) &&
110		   (offset < IO_ISP1161_BASE + IO_ISP1161_EXTENT)) {
111			/*
112			 *	Philips USB ISP1161x chip
113			 */
114		result = IO_ISP1161_PHYS + offset - IO_ISP1161_BASE;
115	} else {
116			/*
117			 *	safe default.
118			 */
119		printk("Warning: unexpected port in %s( offset = 0x%lx )\n",
120		       __func__, offset);
121		result = PVR;
122	}
123
124	return (void __iomem *)result;
125}