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}
124