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 */
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 }