2 * Interface for smsc fdc48m81x Super IO chip
4 * Author: MontaVista Software, Inc. source@mvista.com
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
11 * Copyright 2004 (c) MontaVista Software, Inc.
13 #include <linux/init.h>
14 #include <linux/types.h>
16 #include <asm/tx4927/smsc_fdc37m81x.h>
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
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
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
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
58 static unsigned long g_smsc_fdc37m81x_base = 0;
60 static inline unsigned char smsc_fdc37m81x_rd(unsigned char index)
62 outb(index, g_smsc_fdc37m81x_base + SMSC_FDC37M81X_CONFIG_INDEX);
64 return inb(g_smsc_fdc37m81x_base + SMSC_FDC37M81X_CONFIG_DATA);
67 static inline void smsc_dc37m81x_wr(unsigned char index, unsigned char data)
69 outb(index, g_smsc_fdc37m81x_base + SMSC_FDC37M81X_CONFIG_INDEX);
70 outb(data, g_smsc_fdc37m81x_base + SMSC_FDC37M81X_CONFIG_DATA);
73 void smsc_fdc37m81x_config_beg(void)
75 if (g_smsc_fdc37m81x_base) {
76 outb(SMSC_FDC37M81X_CONFIG_ENTER,
77 g_smsc_fdc37m81x_base + SMSC_FDC37M81X_CONFIG_INDEX);
81 void smsc_fdc37m81x_config_end(void)
83 if (g_smsc_fdc37m81x_base)
84 outb(SMSC_FDC37M81X_CONFIG_EXIT,
85 g_smsc_fdc37m81x_base + SMSC_FDC37M81X_CONFIG_INDEX);
88 u8 smsc_fdc37m81x_config_get(u8 reg)
92 if (g_smsc_fdc37m81x_base)
93 val = smsc_fdc37m81x_rd(reg);
98 void smsc_fdc37m81x_config_set(u8 reg, u8 val)
100 if (g_smsc_fdc37m81x_base)
101 smsc_dc37m81x_wr(reg, val);
104 unsigned long __init smsc_fdc37m81x_init(unsigned long port)
106 const int field = sizeof(unsigned long) * 2;
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);
113 g_smsc_fdc37m81x_base = port;
115 smsc_fdc37m81x_config_beg();
117 chip_id = smsc_fdc37m81x_rd(SMSC_FDC37M81X_DID);
118 if (chip_id == SMSC_FDC37M81X_CHIP_ID)
119 smsc_fdc37m81x_config_end();
121 printk("smsc_fdc37m81x_init() unknow chip id 0x%02x\n",
123 g_smsc_fdc37m81x_base = 0;
126 return g_smsc_fdc37m81x_base;
130 void smsc_fdc37m81x_config_dump_one(char *key, u8 dev, u8 reg)
132 printk("%s: dev=0x%02x reg=0x%02x val=0x%02x\n", key, dev, reg,
133 smsc_fdc37m81x_rd(reg));
136 void smsc_fdc37m81x_config_dump(void)
139 char *fname = "smsc_fdc37m81x_config_dump()";
141 smsc_fdc37m81x_config_beg();
143 orig = smsc_fdc37m81x_rd(SMSC_FDC37M81X_DNUM);
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,
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);
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,
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);
168 smsc_dc37m81x_wr(SMSC_FDC37M81X_DNUM, orig);
170 smsc_fdc37m81x_config_end();