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authorManish Lachwani <mlachwani@mvista.com>2005-01-22 12:23:38 -0500
committerRalf Baechle <ralf@linux-mips.org>2006-10-31 15:13:20 -0500
commite8f05de54055e90e6d58e45866f84ecdb0b48acd (patch)
tree22e3015660eb5ebda7109a125f0bfa4c641b6a1b /arch
parent0887fa5158fe7da4a46ae526d313ae636440deae (diff)
[MIPS] Add missing file for support of backplane on TX4927 based board
Signed-off-by: Manish Lachwani <mlachwani@mvista.com> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'arch')
-rw-r--r--arch/mips/tx4927/common/smsc_fdc37m81x.c172
1 files changed, 172 insertions, 0 deletions
diff --git a/arch/mips/tx4927/common/smsc_fdc37m81x.c b/arch/mips/tx4927/common/smsc_fdc37m81x.c
new file mode 100644
index 000000000000..33f517bc9a08
--- /dev/null
+++ b/arch/mips/tx4927/common/smsc_fdc37m81x.c
@@ -0,0 +1,172 @@
1/*
2 * Interface for smsc fdc48m81x Super IO chip
3 *
4 * Author: MontaVista Software, Inc. source@mvista.com
5 *
6 * 2001-2003 (c) MontaVista Software, Inc. This file is licensed under
7 * the terms of the GNU General Public License version 2. This program
8 * is licensed "as is" without any warranty of any kind, whether express
9 * or implied.
10 *
11 * Copyright 2004 (c) MontaVista Software, Inc.
12 */
13#include <linux/init.h>
14#include <linux/types.h>
15#include <asm/io.h>
16#include <asm/tx4927/smsc_fdc37m81x.h>
17
18#define DEBUG
19
20/* Common Registers */
21#define SMSC_FDC37M81X_CONFIG_INDEX 0x00
22#define SMSC_FDC37M81X_CONFIG_DATA 0x01
23#define SMSC_FDC37M81X_CONF 0x02
24#define SMSC_FDC37M81X_INDEX 0x03
25#define SMSC_FDC37M81X_DNUM 0x07
26#define SMSC_FDC37M81X_DID 0x20
27#define SMSC_FDC37M81X_DREV 0x21
28#define SMSC_FDC37M81X_PCNT 0x22
29#define SMSC_FDC37M81X_PMGT 0x23
30#define SMSC_FDC37M81X_OSC 0x24
31#define SMSC_FDC37M81X_CONFPA0 0x26
32#define SMSC_FDC37M81X_CONFPA1 0x27
33#define SMSC_FDC37M81X_TEST4 0x2B
34#define SMSC_FDC37M81X_TEST5 0x2C
35#define SMSC_FDC37M81X_TEST1 0x2D
36#define SMSC_FDC37M81X_TEST2 0x2E
37#define SMSC_FDC37M81X_TEST3 0x2F
38
39/* Logical device numbers */
40#define SMSC_FDC37M81X_FDD 0x00
41#define SMSC_FDC37M81X_SERIAL1 0x04
42#define SMSC_FDC37M81X_SERIAL2 0x05
43#define SMSC_FDC37M81X_KBD 0x07
44
45/* Logical device Config Registers */
46#define SMSC_FDC37M81X_ACTIVE 0x30
47#define SMSC_FDC37M81X_BASEADDR0 0x60
48#define SMSC_FDC37M81X_BASEADDR1 0x61
49#define SMSC_FDC37M81X_INT 0x70
50#define SMSC_FDC37M81X_INT2 0x72
51#define SMSC_FDC37M81X_MODE 0xF0
52
53/* Chip Config Values */
54#define SMSC_FDC37M81X_CONFIG_ENTER 0x55
55#define SMSC_FDC37M81X_CONFIG_EXIT 0xaa
56#define SMSC_FDC37M81X_CHIP_ID 0x4d
57
58static unsigned long g_smsc_fdc37m81x_base = 0;
59
60static inline unsigned char smsc_fdc37m81x_rd(unsigned char index)
61{
62 outb(index, g_smsc_fdc37m81x_base + SMSC_FDC37M81X_CONFIG_INDEX);
63
64 return inb(g_smsc_fdc37m81x_base + SMSC_FDC37M81X_CONFIG_DATA);
65}
66
67static inline void smsc_dc37m81x_wr(unsigned char index, unsigned char data)
68{
69 outb(index, g_smsc_fdc37m81x_base + SMSC_FDC37M81X_CONFIG_INDEX);
70 outb(data, g_smsc_fdc37m81x_base + SMSC_FDC37M81X_CONFIG_DATA);
71}
72
73void smsc_fdc37m81x_config_beg(void)
74{
75 if (g_smsc_fdc37m81x_base) {
76 outb(SMSC_FDC37M81X_CONFIG_ENTER,
77 g_smsc_fdc37m81x_base + SMSC_FDC37M81X_CONFIG_INDEX);
78 }
79}
80
81void smsc_fdc37m81x_config_end(void)
82{
83 if (g_smsc_fdc37m81x_base)
84 outb(SMSC_FDC37M81X_CONFIG_EXIT,
85 g_smsc_fdc37m81x_base + SMSC_FDC37M81X_CONFIG_INDEX);
86}
87
88u8 smsc_fdc37m81x_config_get(u8 reg)
89{
90 u8 val = 0;
91
92 if (g_smsc_fdc37m81x_base)
93 val = smsc_fdc37m81x_rd(reg);
94
95 return val;
96}
97
98void smsc_fdc37m81x_config_set(u8 reg, u8 val)
99{
100 if (g_smsc_fdc37m81x_base)
101 smsc_dc37m81x_wr(reg, val);
102}
103
104unsigned long __init smsc_fdc37m81x_init(unsigned long port)
105{
106 const int field = sizeof(unsigned long) * 2;
107 u8 chip_id;
108
109 if (g_smsc_fdc37m81x_base)
110 printk("smsc_fdc37m81x_init() stepping on old base=0x%0*lx\n",
111 field, g_smsc_fdc37m81x_base);
112
113 g_smsc_fdc37m81x_base = port;
114
115 smsc_fdc37m81x_config_beg();
116
117 chip_id = smsc_fdc37m81x_rd(SMSC_FDC37M81X_DID);
118 if (chip_id == SMSC_FDC37M81X_CHIP_ID)
119 smsc_fdc37m81x_config_end();
120 else {
121 printk("smsc_fdc37m81x_init() unknow chip id 0x%02x\n",
122 chip_id);
123 g_smsc_fdc37m81x_base = 0;
124 }
125
126 return g_smsc_fdc37m81x_base;
127}
128
129#ifdef DEBUG
130void smsc_fdc37m81x_config_dump_one(char *key, u8 dev, u8 reg)
131{
132 printk("%s: dev=0x%02x reg=0x%02x val=0x%02x\n", key, dev, reg,
133 smsc_fdc37m81x_rd(reg));
134}
135
136void smsc_fdc37m81x_config_dump(void)
137{
138 u8 orig;
139 char *fname = "smsc_fdc37m81x_config_dump()";
140
141 smsc_fdc37m81x_config_beg();
142
143 orig = smsc_fdc37m81x_rd(SMSC_FDC37M81X_DNUM);
144
145 printk("%s: common\n", fname);
146 smsc_fdc37m81x_config_dump_one(fname, SMSC_FDC37M81X_NONE,
147 SMSC_FDC37M81X_DNUM);
148 smsc_fdc37m81x_config_dump_one(fname, SMSC_FDC37M81X_NONE,
149 SMSC_FDC37M81X_DID);
150 smsc_fdc37m81x_config_dump_one(fname, SMSC_FDC37M81X_NONE,
151 SMSC_FDC37M81X_DREV);
152 smsc_fdc37m81x_config_dump_one(fname, SMSC_FDC37M81X_NONE,
153 SMSC_FDC37M81X_PCNT);
154 smsc_fdc37m81x_config_dump_one(fname, SMSC_FDC37M81X_NONE,
155 SMSC_FDC37M81X_PMGT);
156
157 printk("%s: keyboard\n", fname);
158 smsc_dc37m81x_wr(SMSC_FDC37M81X_DNUM, SMSC_FDC37M81X_KBD);
159 smsc_fdc37m81x_config_dump_one(fname, SMSC_FDC37M81X_KBD,
160 SMSC_FDC37M81X_ACTIVE);
161 smsc_fdc37m81x_config_dump_one(fname, SMSC_FDC37M81X_KBD,
162 SMSC_FDC37M81X_INT);
163 smsc_fdc37m81x_config_dump_one(fname, SMSC_FDC37M81X_KBD,
164 SMSC_FDC37M81X_INT2);
165 smsc_fdc37m81x_config_dump_one(fname, SMSC_FDC37M81X_KBD,
166 SMSC_FDC37M81X_LDCR_F0);
167
168 smsc_dc37m81x_wr(SMSC_FDC37M81X_DNUM, orig);
169
170 smsc_fdc37m81x_config_end();
171}
172#endif