xref: /openbmc/linux/arch/sh/boards/mach-microdev/io.c (revision 597473720f4dc69749542bfcfed4a927a43d935e)
1*aaf9128aSKuninori Morimoto // SPDX-License-Identifier: GPL-2.0
2da2014a2SPaul Mundt /*
3da2014a2SPaul Mundt  * linux/arch/sh/boards/superh/microdev/io.c
4da2014a2SPaul Mundt  *
5da2014a2SPaul Mundt  * Copyright (C) 2003 Sean McGoogan (Sean.McGoogan@superh.com)
6da2014a2SPaul Mundt  * Copyright (C) 2003, 2004 SuperH, Inc.
7da2014a2SPaul Mundt  * Copyright (C) 2004 Paul Mundt
8da2014a2SPaul Mundt  *
9da2014a2SPaul Mundt  * SuperH SH4-202 MicroDev board support.
10da2014a2SPaul Mundt  */
11da2014a2SPaul Mundt 
12da2014a2SPaul Mundt #include <linux/init.h>
13da2014a2SPaul Mundt #include <linux/pci.h>
14da2014a2SPaul Mundt #include <linux/wait.h>
15da2014a2SPaul Mundt #include <asm/io.h>
167639a454SPaul Mundt #include <mach/microdev.h>
17da2014a2SPaul Mundt 
18da2014a2SPaul Mundt 	/*
19da2014a2SPaul Mundt 	 *	we need to have a 'safe' address to re-direct all I/O requests
20da2014a2SPaul Mundt 	 *	that we do not explicitly wish to handle. This safe address
21da2014a2SPaul Mundt 	 *	must have the following properies:
22da2014a2SPaul Mundt 	 *
23da2014a2SPaul Mundt 	 *		* writes are ignored (no exception)
24da2014a2SPaul Mundt 	 *		* reads are benign (no side-effects)
25da2014a2SPaul Mundt 	 *		* accesses of width 1, 2 and 4-bytes are all valid.
26da2014a2SPaul Mundt 	 *
27da2014a2SPaul Mundt 	 *	The Processor Version Register (PVR) has these properties.
28da2014a2SPaul Mundt 	 */
29da2014a2SPaul Mundt #define	PVR	0xff000030	/* Processor Version Register */
30da2014a2SPaul Mundt 
31da2014a2SPaul Mundt 
32da2014a2SPaul Mundt #define	IO_IDE2_BASE		0x170ul	/* I/O base for SMSC FDC37C93xAPM IDE #2 */
33da2014a2SPaul Mundt #define	IO_IDE1_BASE		0x1f0ul	/* I/O base for SMSC FDC37C93xAPM IDE #1 */
34da2014a2SPaul Mundt #define IO_ISP1161_BASE		0x290ul /* I/O port for Philips ISP1161x USB chip */
35da2014a2SPaul Mundt #define IO_SERIAL2_BASE		0x2f8ul /* I/O base for SMSC FDC37C93xAPM Serial #2 */
36da2014a2SPaul Mundt #define	IO_LAN91C111_BASE	0x300ul	/* I/O base for SMSC LAN91C111 Ethernet chip */
37da2014a2SPaul Mundt #define	IO_IDE2_MISC		0x376ul	/* I/O misc for SMSC FDC37C93xAPM IDE #2 */
38da2014a2SPaul Mundt #define IO_SUPERIO_BASE		0x3f0ul /* I/O base for SMSC FDC37C93xAPM SuperIO chip */
39da2014a2SPaul Mundt #define	IO_IDE1_MISC		0x3f6ul	/* I/O misc for SMSC FDC37C93xAPM IDE #1 */
40da2014a2SPaul Mundt #define IO_SERIAL1_BASE		0x3f8ul /* I/O base for SMSC FDC37C93xAPM Serial #1 */
41da2014a2SPaul Mundt 
42da2014a2SPaul Mundt #define	IO_ISP1161_EXTENT	0x04ul	/* I/O extent for Philips ISP1161x USB chip */
43da2014a2SPaul Mundt #define	IO_LAN91C111_EXTENT	0x10ul	/* I/O extent for SMSC LAN91C111 Ethernet chip */
44da2014a2SPaul Mundt #define	IO_SUPERIO_EXTENT	0x02ul	/* I/O extent for SMSC FDC37C93xAPM SuperIO chip */
45da2014a2SPaul Mundt #define	IO_IDE_EXTENT		0x08ul	/* I/O extent for IDE Task Register set */
46da2014a2SPaul Mundt #define IO_SERIAL_EXTENT	0x10ul
47da2014a2SPaul Mundt 
48da2014a2SPaul Mundt #define	IO_LAN91C111_PHYS	0xa7500000ul	/* Physical address of SMSC LAN91C111 Ethernet chip */
49da2014a2SPaul Mundt #define	IO_ISP1161_PHYS		0xa7700000ul	/* Physical address of Philips ISP1161x USB chip */
50da2014a2SPaul Mundt #define	IO_SUPERIO_PHYS		0xa7800000ul	/* Physical address of SMSC FDC37C93xAPM SuperIO chip */
51da2014a2SPaul Mundt 
52da2014a2SPaul Mundt /*
53da2014a2SPaul Mundt  * map I/O ports to memory-mapped addresses
54da2014a2SPaul Mundt  */
microdev_ioport_map(unsigned long offset,unsigned int len)5546bc8587SPaul Mundt void __iomem *microdev_ioport_map(unsigned long offset, unsigned int len)
56da2014a2SPaul Mundt {
57da2014a2SPaul Mundt 	unsigned long result;
58da2014a2SPaul Mundt 
59da2014a2SPaul Mundt 	if ((offset >= IO_LAN91C111_BASE) &&
60da2014a2SPaul Mundt 	    (offset <  IO_LAN91C111_BASE + IO_LAN91C111_EXTENT)) {
61da2014a2SPaul Mundt 			/*
62da2014a2SPaul Mundt 			 *	SMSC LAN91C111 Ethernet chip
63da2014a2SPaul Mundt 			 */
64da2014a2SPaul Mundt 		result = IO_LAN91C111_PHYS + offset - IO_LAN91C111_BASE;
65da2014a2SPaul Mundt 	} else if ((offset >= IO_SUPERIO_BASE) &&
66da2014a2SPaul Mundt 		   (offset <  IO_SUPERIO_BASE + IO_SUPERIO_EXTENT)) {
67da2014a2SPaul Mundt 			/*
68da2014a2SPaul Mundt 			 *	SMSC FDC37C93xAPM SuperIO chip
69da2014a2SPaul Mundt 			 *
70da2014a2SPaul Mundt 			 *	Configuration Registers
71da2014a2SPaul Mundt 			 */
72da2014a2SPaul Mundt 		result = IO_SUPERIO_PHYS + (offset << 1);
73da2014a2SPaul Mundt 	} else if (((offset >= IO_IDE1_BASE) &&
74da2014a2SPaul Mundt 		    (offset <  IO_IDE1_BASE + IO_IDE_EXTENT)) ||
75da2014a2SPaul Mundt 		    (offset == IO_IDE1_MISC)) {
76da2014a2SPaul Mundt 			/*
77da2014a2SPaul Mundt 			 *	SMSC FDC37C93xAPM SuperIO chip
78da2014a2SPaul Mundt 			 *
79da2014a2SPaul Mundt 			 *	IDE #1
80da2014a2SPaul Mundt 			 */
81da2014a2SPaul Mundt 	        result = IO_SUPERIO_PHYS + (offset << 1);
82da2014a2SPaul Mundt 	} else if (((offset >= IO_IDE2_BASE) &&
83da2014a2SPaul Mundt 		    (offset <  IO_IDE2_BASE + IO_IDE_EXTENT)) ||
84da2014a2SPaul Mundt 		    (offset == IO_IDE2_MISC)) {
85da2014a2SPaul Mundt 			/*
86da2014a2SPaul Mundt 			 *	SMSC FDC37C93xAPM SuperIO chip
87da2014a2SPaul Mundt 			 *
88da2014a2SPaul Mundt 			 *	IDE #2
89da2014a2SPaul Mundt 			 */
90da2014a2SPaul Mundt 	        result = IO_SUPERIO_PHYS + (offset << 1);
91da2014a2SPaul Mundt 	} else if ((offset >= IO_SERIAL1_BASE) &&
92da2014a2SPaul Mundt 		   (offset <  IO_SERIAL1_BASE + IO_SERIAL_EXTENT)) {
93da2014a2SPaul Mundt 			/*
94da2014a2SPaul Mundt 			 *	SMSC FDC37C93xAPM SuperIO chip
95da2014a2SPaul Mundt 			 *
96da2014a2SPaul Mundt 			 *	Serial #1
97da2014a2SPaul Mundt 			 */
98da2014a2SPaul Mundt 		result = IO_SUPERIO_PHYS + (offset << 1);
99da2014a2SPaul Mundt 	} else if ((offset >= IO_SERIAL2_BASE) &&
100da2014a2SPaul Mundt 		   (offset <  IO_SERIAL2_BASE + IO_SERIAL_EXTENT)) {
101da2014a2SPaul Mundt 			/*
102da2014a2SPaul Mundt 			 *	SMSC FDC37C93xAPM SuperIO chip
103da2014a2SPaul Mundt 			 *
104da2014a2SPaul Mundt 			 *	Serial #2
105da2014a2SPaul Mundt 			 */
106da2014a2SPaul Mundt 		result = IO_SUPERIO_PHYS + (offset << 1);
107da2014a2SPaul Mundt 	} else if ((offset >= IO_ISP1161_BASE) &&
108da2014a2SPaul Mundt 		   (offset < IO_ISP1161_BASE + IO_ISP1161_EXTENT)) {
109da2014a2SPaul Mundt 			/*
110da2014a2SPaul Mundt 			 *	Philips USB ISP1161x chip
111da2014a2SPaul Mundt 			 */
112da2014a2SPaul Mundt 		result = IO_ISP1161_PHYS + offset - IO_ISP1161_BASE;
113da2014a2SPaul Mundt 	} else {
114da2014a2SPaul Mundt 			/*
115da2014a2SPaul Mundt 			 *	safe default.
116da2014a2SPaul Mundt 			 */
117da2014a2SPaul Mundt 		printk("Warning: unexpected port in %s( offset = 0x%lx )\n",
118da2014a2SPaul Mundt 		       __func__, offset);
119da2014a2SPaul Mundt 		result = PVR;
120da2014a2SPaul Mundt 	}
121da2014a2SPaul Mundt 
12246bc8587SPaul Mundt 	return (void __iomem *)result;
123da2014a2SPaul Mundt }
124