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11#include <linux/kernel.h>
12#include <linux/module.h>
13#include <linux/i2c.h>
14#include <linux/regmap.h>
15#include <linux/mfd/88pm860x.h>
16
17int pm860x_reg_read(struct i2c_client *i2c, int reg)
18{
19 struct pm860x_chip *chip = i2c_get_clientdata(i2c);
20 struct regmap *map = (i2c == chip->client) ? chip->regmap
21 : chip->regmap_companion;
22 unsigned int data;
23 int ret;
24
25 ret = regmap_read(map, reg, &data);
26 if (ret < 0)
27 return ret;
28 else
29 return (int)data;
30}
31EXPORT_SYMBOL(pm860x_reg_read);
32
33int pm860x_reg_write(struct i2c_client *i2c, int reg,
34 unsigned char data)
35{
36 struct pm860x_chip *chip = i2c_get_clientdata(i2c);
37 struct regmap *map = (i2c == chip->client) ? chip->regmap
38 : chip->regmap_companion;
39 int ret;
40
41 ret = regmap_write(map, reg, data);
42 return ret;
43}
44EXPORT_SYMBOL(pm860x_reg_write);
45
46int pm860x_bulk_read(struct i2c_client *i2c, int reg,
47 int count, unsigned char *buf)
48{
49 struct pm860x_chip *chip = i2c_get_clientdata(i2c);
50 struct regmap *map = (i2c == chip->client) ? chip->regmap
51 : chip->regmap_companion;
52 int ret;
53
54 ret = regmap_raw_read(map, reg, buf, count);
55 return ret;
56}
57EXPORT_SYMBOL(pm860x_bulk_read);
58
59int pm860x_bulk_write(struct i2c_client *i2c, int reg,
60 int count, unsigned char *buf)
61{
62 struct pm860x_chip *chip = i2c_get_clientdata(i2c);
63 struct regmap *map = (i2c == chip->client) ? chip->regmap
64 : chip->regmap_companion;
65 int ret;
66
67 ret = regmap_raw_write(map, reg, buf, count);
68 return ret;
69}
70EXPORT_SYMBOL(pm860x_bulk_write);
71
72int pm860x_set_bits(struct i2c_client *i2c, int reg,
73 unsigned char mask, unsigned char data)
74{
75 struct pm860x_chip *chip = i2c_get_clientdata(i2c);
76 struct regmap *map = (i2c == chip->client) ? chip->regmap
77 : chip->regmap_companion;
78 int ret;
79
80 ret = regmap_update_bits(map, reg, mask, data);
81 return ret;
82}
83EXPORT_SYMBOL(pm860x_set_bits);
84
85static int read_device(struct i2c_client *i2c, int reg,
86 int bytes, void *dest)
87{
88 unsigned char msgbuf0[I2C_SMBUS_BLOCK_MAX + 3];
89 unsigned char msgbuf1[I2C_SMBUS_BLOCK_MAX + 2];
90 struct i2c_adapter *adap = i2c->adapter;
91 struct i2c_msg msg[2] = {
92 {
93 .addr = i2c->addr,
94 .flags = 0,
95 .len = 1,
96 .buf = msgbuf0
97 },
98 { .addr = i2c->addr,
99 .flags = I2C_M_RD,
100 .len = 0,
101 .buf = msgbuf1
102 },
103 };
104 int num = 1, ret = 0;
105
106 if (dest == NULL)
107 return -EINVAL;
108 msgbuf0[0] = (unsigned char)reg;
109 msg[1].len = bytes;
110
111
112 if (bytes > 0)
113 num = 2;
114 ret = adap->algo->master_xfer(adap, msg, num);
115 memcpy(dest, msgbuf1, bytes);
116 if (ret < 0)
117 return ret;
118 return 0;
119}
120
121static int write_device(struct i2c_client *i2c, int reg,
122 int bytes, void *src)
123{
124 unsigned char buf[bytes + 1];
125 struct i2c_adapter *adap = i2c->adapter;
126 struct i2c_msg msg;
127 int ret;
128
129 buf[0] = (unsigned char)reg;
130 memcpy(&buf[1], src, bytes);
131 msg.addr = i2c->addr;
132 msg.flags = 0;
133 msg.len = bytes + 1;
134 msg.buf = buf;
135
136 ret = adap->algo->master_xfer(adap, &msg, 1);
137 if (ret < 0)
138 return ret;
139 return 0;
140}
141
142int pm860x_page_reg_read(struct i2c_client *i2c, int reg)
143{
144 unsigned char zero = 0;
145 unsigned char data;
146 int ret;
147
148 i2c_lock_adapter(i2c->adapter);
149 read_device(i2c, 0xFA, 0, &zero);
150 read_device(i2c, 0xFB, 0, &zero);
151 read_device(i2c, 0xFF, 0, &zero);
152 ret = read_device(i2c, reg, 1, &data);
153 if (ret >= 0)
154 ret = (int)data;
155 read_device(i2c, 0xFE, 0, &zero);
156 read_device(i2c, 0xFC, 0, &zero);
157 i2c_unlock_adapter(i2c->adapter);
158 return ret;
159}
160EXPORT_SYMBOL(pm860x_page_reg_read);
161
162int pm860x_page_reg_write(struct i2c_client *i2c, int reg,
163 unsigned char data)
164{
165 unsigned char zero;
166 int ret;
167
168 i2c_lock_adapter(i2c->adapter);
169 read_device(i2c, 0xFA, 0, &zero);
170 read_device(i2c, 0xFB, 0, &zero);
171 read_device(i2c, 0xFF, 0, &zero);
172 ret = write_device(i2c, reg, 1, &data);
173 read_device(i2c, 0xFE, 0, &zero);
174 read_device(i2c, 0xFC, 0, &zero);
175 i2c_unlock_adapter(i2c->adapter);
176 return ret;
177}
178EXPORT_SYMBOL(pm860x_page_reg_write);
179
180int pm860x_page_bulk_read(struct i2c_client *i2c, int reg,
181 int count, unsigned char *buf)
182{
183 unsigned char zero = 0;
184 int ret;
185
186 i2c_lock_adapter(i2c->adapter);
187 read_device(i2c, 0xfa, 0, &zero);
188 read_device(i2c, 0xfb, 0, &zero);
189 read_device(i2c, 0xff, 0, &zero);
190 ret = read_device(i2c, reg, count, buf);
191 read_device(i2c, 0xFE, 0, &zero);
192 read_device(i2c, 0xFC, 0, &zero);
193 i2c_unlock_adapter(i2c->adapter);
194 return ret;
195}
196EXPORT_SYMBOL(pm860x_page_bulk_read);
197
198int pm860x_page_bulk_write(struct i2c_client *i2c, int reg,
199 int count, unsigned char *buf)
200{
201 unsigned char zero = 0;
202 int ret;
203
204 i2c_lock_adapter(i2c->adapter);
205 read_device(i2c, 0xFA, 0, &zero);
206 read_device(i2c, 0xFB, 0, &zero);
207 read_device(i2c, 0xFF, 0, &zero);
208 ret = write_device(i2c, reg, count, buf);
209 read_device(i2c, 0xFE, 0, &zero);
210 read_device(i2c, 0xFC, 0, &zero);
211 i2c_unlock_adapter(i2c->adapter);
212 i2c_unlock_adapter(i2c->adapter);
213 return ret;
214}
215EXPORT_SYMBOL(pm860x_page_bulk_write);
216
217int pm860x_page_set_bits(struct i2c_client *i2c, int reg,
218 unsigned char mask, unsigned char data)
219{
220 unsigned char zero;
221 unsigned char value;
222 int ret;
223
224 i2c_lock_adapter(i2c->adapter);
225 read_device(i2c, 0xFA, 0, &zero);
226 read_device(i2c, 0xFB, 0, &zero);
227 read_device(i2c, 0xFF, 0, &zero);
228 ret = read_device(i2c, reg, 1, &value);
229 if (ret < 0)
230 goto out;
231 value &= ~mask;
232 value |= data;
233 ret = write_device(i2c, reg, 1, &value);
234out:
235 read_device(i2c, 0xFE, 0, &zero);
236 read_device(i2c, 0xFC, 0, &zero);
237 i2c_unlock_adapter(i2c->adapter);
238 return ret;
239}
240EXPORT_SYMBOL(pm860x_page_set_bits);
241
