xref: /openbmc/linux/arch/sh/boards/mach-microdev/io.c (revision aaf9128a)
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  */
microdev_ioport_map(unsigned long offset,unsigned int len)55 void __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