1// SPDX-License-Identifier: GPL-2.0
  2/*
  3 * linux/arch/sh/boards/superh/microdev/io.c
  4 *
  5 * Copyright (C) 2003 Sean McGoogan (Sean.McGoogan@superh.com)
  6 * Copyright (C) 2003, 2004 SuperH, Inc.
  7 * Copyright (C) 2004 Paul Mundt
  8 *
  9 * SuperH SH4-202 MicroDev board support.
 10 */
 11
 12#include <linux/init.h>
 13#include <linux/pci.h>
 14#include <linux/wait.h>
 15#include <asm/io.h>
 16#include <mach/microdev.h>
 17
 18	/*
 19	 *	we need to have a 'safe' address to re-direct all I/O requests
 20	 *	that we do not explicitly wish to handle. This safe address
 21	 *	must have the following properies:
 22	 *
 23	 *		* writes are ignored (no exception)
 24	 *		* reads are benign (no side-effects)
 25	 *		* accesses of width 1, 2 and 4-bytes are all valid.
 26	 *
 27	 *	The Processor Version Register (PVR) has these properties.
 28	 */
 29#define	PVR	0xff000030	/* Processor Version Register */
 30
 31
 32#define	IO_IDE2_BASE		0x170ul	/* I/O base for SMSC FDC37C93xAPM IDE #2 */
 33#define	IO_IDE1_BASE		0x1f0ul	/* I/O base for SMSC FDC37C93xAPM IDE #1 */
 34#define IO_ISP1161_BASE		0x290ul /* I/O port for Philips ISP1161x USB chip */
 35#define IO_SERIAL2_BASE		0x2f8ul /* I/O base for SMSC FDC37C93xAPM Serial #2 */
 36#define	IO_LAN91C111_BASE	0x300ul	/* I/O base for SMSC LAN91C111 Ethernet chip */
 37#define	IO_IDE2_MISC		0x376ul	/* I/O misc for SMSC FDC37C93xAPM IDE #2 */
 38#define IO_SUPERIO_BASE		0x3f0ul /* I/O base for SMSC FDC37C93xAPM SuperIO chip */
 39#define	IO_IDE1_MISC		0x3f6ul	/* I/O misc for SMSC FDC37C93xAPM IDE #1 */
 40#define IO_SERIAL1_BASE		0x3f8ul /* I/O base for SMSC FDC37C93xAPM Serial #1 */
 41
 42#define	IO_ISP1161_EXTENT	0x04ul	/* I/O extent for Philips ISP1161x USB chip */
 43#define	IO_LAN91C111_EXTENT	0x10ul	/* I/O extent for SMSC LAN91C111 Ethernet chip */
 44#define	IO_SUPERIO_EXTENT	0x02ul	/* I/O extent for SMSC FDC37C93xAPM SuperIO chip */
 45#define	IO_IDE_EXTENT		0x08ul	/* I/O extent for IDE Task Register set */
 46#define IO_SERIAL_EXTENT	0x10ul
 47
 48#define	IO_LAN91C111_PHYS	0xa7500000ul	/* Physical address of SMSC LAN91C111 Ethernet chip */
 49#define	IO_ISP1161_PHYS		0xa7700000ul	/* Physical address of Philips ISP1161x USB chip */
 50#define	IO_SUPERIO_PHYS		0xa7800000ul	/* Physical address of SMSC FDC37C93xAPM SuperIO chip */
 51
 52/*
 53 * map I/O ports to memory-mapped addresses
 54 */
 55void __iomem *microdev_ioport_map(unsigned long offset, unsigned int len)
 56{
 57	unsigned long result;
 58
 59	if ((offset >= IO_LAN91C111_BASE) &&
 60	    (offset <  IO_LAN91C111_BASE + IO_LAN91C111_EXTENT)) {
 61			/*
 62			 *	SMSC LAN91C111 Ethernet chip
 63			 */
 64		result = IO_LAN91C111_PHYS + offset - IO_LAN91C111_BASE;
 65	} else if ((offset >= IO_SUPERIO_BASE) &&
 66		   (offset <  IO_SUPERIO_BASE + IO_SUPERIO_EXTENT)) {
 67			/*
 68			 *	SMSC FDC37C93xAPM SuperIO chip
 69			 *
 70			 *	Configuration Registers
 71			 */
 72		result = IO_SUPERIO_PHYS + (offset << 1);
 73	} else if (((offset >= IO_IDE1_BASE) &&
 74		    (offset <  IO_IDE1_BASE + IO_IDE_EXTENT)) ||
 75		    (offset == IO_IDE1_MISC)) {
 76			/*
 77			 *	SMSC FDC37C93xAPM SuperIO chip
 78			 *
 79			 *	IDE #1
 80			 */
 81	        result = IO_SUPERIO_PHYS + (offset << 1);
 82	} else if (((offset >= IO_IDE2_BASE) &&
 83		    (offset <  IO_IDE2_BASE + IO_IDE_EXTENT)) ||
 84		    (offset == IO_IDE2_MISC)) {
 85			/*
 86			 *	SMSC FDC37C93xAPM SuperIO chip
 87			 *
 88			 *	IDE #2
 89			 */
 90	        result = IO_SUPERIO_PHYS + (offset << 1);
 91	} else if ((offset >= IO_SERIAL1_BASE) &&
 92		   (offset <  IO_SERIAL1_BASE + IO_SERIAL_EXTENT)) {
 93			/*
 94			 *	SMSC FDC37C93xAPM SuperIO chip
 95			 *
 96			 *	Serial #1
 97			 */
 98		result = IO_SUPERIO_PHYS + (offset << 1);
 99	} else if ((offset >= IO_SERIAL2_BASE) &&
100		   (offset <  IO_SERIAL2_BASE + IO_SERIAL_EXTENT)) {
101			/*
102			 *	SMSC FDC37C93xAPM SuperIO chip
103			 *
104			 *	Serial #2
105			 */
106		result = IO_SUPERIO_PHYS + (offset << 1);
107	} else if ((offset >= IO_ISP1161_BASE) &&
108		   (offset < IO_ISP1161_BASE + IO_ISP1161_EXTENT)) {
109			/*
110			 *	Philips USB ISP1161x chip
111			 */
112		result = IO_ISP1161_PHYS + offset - IO_ISP1161_BASE;
113	} else {
114			/*
115			 *	safe default.
116			 */
117		printk("Warning: unexpected port in %s( offset = 0x%lx )\n",
118		       __func__, offset);
119		result = PVR;
120	}
121
122	return (void __iomem *)result;
123}