6b13f685e
김민수
BSP 최초 추가
|
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
|
/*
* I2C driver for Marvell 88PM860x
*
* Copyright (C) 2009 Marvell International Ltd.
* Haojian Zhuang <haojian.zhuang@marvell.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/i2c.h>
#include <linux/regmap.h>
#include <linux/mfd/88pm860x.h>
int pm860x_reg_read(struct i2c_client *i2c, int reg)
{
struct pm860x_chip *chip = i2c_get_clientdata(i2c);
struct regmap *map = (i2c == chip->client) ? chip->regmap
: chip->regmap_companion;
unsigned int data;
int ret;
ret = regmap_read(map, reg, &data);
if (ret < 0)
return ret;
else
return (int)data;
}
EXPORT_SYMBOL(pm860x_reg_read);
int pm860x_reg_write(struct i2c_client *i2c, int reg,
unsigned char data)
{
struct pm860x_chip *chip = i2c_get_clientdata(i2c);
struct regmap *map = (i2c == chip->client) ? chip->regmap
: chip->regmap_companion;
int ret;
ret = regmap_write(map, reg, data);
return ret;
}
EXPORT_SYMBOL(pm860x_reg_write);
int pm860x_bulk_read(struct i2c_client *i2c, int reg,
int count, unsigned char *buf)
{
struct pm860x_chip *chip = i2c_get_clientdata(i2c);
struct regmap *map = (i2c == chip->client) ? chip->regmap
: chip->regmap_companion;
int ret;
ret = regmap_raw_read(map, reg, buf, count);
return ret;
}
EXPORT_SYMBOL(pm860x_bulk_read);
int pm860x_bulk_write(struct i2c_client *i2c, int reg,
int count, unsigned char *buf)
{
struct pm860x_chip *chip = i2c_get_clientdata(i2c);
struct regmap *map = (i2c == chip->client) ? chip->regmap
: chip->regmap_companion;
int ret;
ret = regmap_raw_write(map, reg, buf, count);
return ret;
}
EXPORT_SYMBOL(pm860x_bulk_write);
int pm860x_set_bits(struct i2c_client *i2c, int reg,
unsigned char mask, unsigned char data)
{
struct pm860x_chip *chip = i2c_get_clientdata(i2c);
struct regmap *map = (i2c == chip->client) ? chip->regmap
: chip->regmap_companion;
int ret;
ret = regmap_update_bits(map, reg, mask, data);
return ret;
}
EXPORT_SYMBOL(pm860x_set_bits);
static int read_device(struct i2c_client *i2c, int reg,
int bytes, void *dest)
{
unsigned char msgbuf0[I2C_SMBUS_BLOCK_MAX + 3];
unsigned char msgbuf1[I2C_SMBUS_BLOCK_MAX + 2];
struct i2c_adapter *adap = i2c->adapter;
struct i2c_msg msg[2] = {
{
.addr = i2c->addr,
.flags = 0,
.len = 1,
.buf = msgbuf0
},
{ .addr = i2c->addr,
.flags = I2C_M_RD,
.len = 0,
.buf = msgbuf1
},
};
int num = 1, ret = 0;
if (dest == NULL)
return -EINVAL;
msgbuf0[0] = (unsigned char)reg; /* command */
msg[1].len = bytes;
/* if data needs to read back, num should be 2 */
if (bytes > 0)
num = 2;
ret = adap->algo->master_xfer(adap, msg, num);
memcpy(dest, msgbuf1, bytes);
if (ret < 0)
return ret;
return 0;
}
static int write_device(struct i2c_client *i2c, int reg,
int bytes, void *src)
{
unsigned char buf[bytes + 1];
struct i2c_adapter *adap = i2c->adapter;
struct i2c_msg msg;
int ret;
buf[0] = (unsigned char)reg;
memcpy(&buf[1], src, bytes);
msg.addr = i2c->addr;
msg.flags = 0;
msg.len = bytes + 1;
msg.buf = buf;
ret = adap->algo->master_xfer(adap, &msg, 1);
if (ret < 0)
return ret;
return 0;
}
int pm860x_page_reg_read(struct i2c_client *i2c, int reg)
{
unsigned char zero = 0;
unsigned char data;
int ret;
i2c_lock_adapter(i2c->adapter);
read_device(i2c, 0xFA, 0, &zero);
read_device(i2c, 0xFB, 0, &zero);
read_device(i2c, 0xFF, 0, &zero);
ret = read_device(i2c, reg, 1, &data);
if (ret >= 0)
ret = (int)data;
read_device(i2c, 0xFE, 0, &zero);
read_device(i2c, 0xFC, 0, &zero);
i2c_unlock_adapter(i2c->adapter);
return ret;
}
EXPORT_SYMBOL(pm860x_page_reg_read);
int pm860x_page_reg_write(struct i2c_client *i2c, int reg,
unsigned char data)
{
unsigned char zero;
int ret;
i2c_lock_adapter(i2c->adapter);
read_device(i2c, 0xFA, 0, &zero);
read_device(i2c, 0xFB, 0, &zero);
read_device(i2c, 0xFF, 0, &zero);
ret = write_device(i2c, reg, 1, &data);
read_device(i2c, 0xFE, 0, &zero);
read_device(i2c, 0xFC, 0, &zero);
i2c_unlock_adapter(i2c->adapter);
return ret;
}
EXPORT_SYMBOL(pm860x_page_reg_write);
int pm860x_page_bulk_read(struct i2c_client *i2c, int reg,
int count, unsigned char *buf)
{
unsigned char zero = 0;
int ret;
i2c_lock_adapter(i2c->adapter);
read_device(i2c, 0xfa, 0, &zero);
read_device(i2c, 0xfb, 0, &zero);
read_device(i2c, 0xff, 0, &zero);
ret = read_device(i2c, reg, count, buf);
read_device(i2c, 0xFE, 0, &zero);
read_device(i2c, 0xFC, 0, &zero);
i2c_unlock_adapter(i2c->adapter);
return ret;
}
EXPORT_SYMBOL(pm860x_page_bulk_read);
int pm860x_page_bulk_write(struct i2c_client *i2c, int reg,
int count, unsigned char *buf)
{
unsigned char zero = 0;
int ret;
i2c_lock_adapter(i2c->adapter);
read_device(i2c, 0xFA, 0, &zero);
read_device(i2c, 0xFB, 0, &zero);
read_device(i2c, 0xFF, 0, &zero);
ret = write_device(i2c, reg, count, buf);
read_device(i2c, 0xFE, 0, &zero);
read_device(i2c, 0xFC, 0, &zero);
i2c_unlock_adapter(i2c->adapter);
i2c_unlock_adapter(i2c->adapter);
return ret;
}
EXPORT_SYMBOL(pm860x_page_bulk_write);
int pm860x_page_set_bits(struct i2c_client *i2c, int reg,
unsigned char mask, unsigned char data)
{
unsigned char zero;
unsigned char value;
int ret;
i2c_lock_adapter(i2c->adapter);
read_device(i2c, 0xFA, 0, &zero);
read_device(i2c, 0xFB, 0, &zero);
read_device(i2c, 0xFF, 0, &zero);
ret = read_device(i2c, reg, 1, &value);
if (ret < 0)
goto out;
value &= ~mask;
value |= data;
ret = write_device(i2c, reg, 1, &value);
out:
read_device(i2c, 0xFE, 0, &zero);
read_device(i2c, 0xFC, 0, &zero);
i2c_unlock_adapter(i2c->adapter);
return ret;
}
EXPORT_SYMBOL(pm860x_page_set_bits);
|