Commit | Line | Data |
---|---|---|
d2912cb1 | 1 | // SPDX-License-Identifier: GPL-2.0-only |
bbd51b1f | 2 | /* |
53dbab7a | 3 | * I2C driver for Marvell 88PM860x |
bbd51b1f HZ |
4 | * |
5 | * Copyright (C) 2009 Marvell International Ltd. | |
0363be8b LJ |
6 | * |
7 | * Author: Haojian Zhuang <haojian.zhuang@marvell.com> | |
bbd51b1f HZ |
8 | */ |
9 | #include <linux/kernel.h> | |
10 | #include <linux/module.h> | |
bbd51b1f | 11 | #include <linux/i2c.h> |
b46a36c0 | 12 | #include <linux/regmap.h> |
53dbab7a | 13 | #include <linux/mfd/88pm860x.h> |
bbd51b1f | 14 | |
53dbab7a | 15 | int pm860x_reg_read(struct i2c_client *i2c, int reg) |
bbd51b1f | 16 | { |
53dbab7a | 17 | struct pm860x_chip *chip = i2c_get_clientdata(i2c); |
b46a36c0 JZ |
18 | struct regmap *map = (i2c == chip->client) ? chip->regmap |
19 | : chip->regmap_companion; | |
20 | unsigned int data; | |
bbd51b1f HZ |
21 | int ret; |
22 | ||
b46a36c0 | 23 | ret = regmap_read(map, reg, &data); |
bbd51b1f HZ |
24 | if (ret < 0) |
25 | return ret; | |
26 | else | |
27 | return (int)data; | |
28 | } | |
53dbab7a | 29 | EXPORT_SYMBOL(pm860x_reg_read); |
bbd51b1f | 30 | |
53dbab7a | 31 | int pm860x_reg_write(struct i2c_client *i2c, int reg, |
bbd51b1f HZ |
32 | unsigned char data) |
33 | { | |
53dbab7a | 34 | struct pm860x_chip *chip = i2c_get_clientdata(i2c); |
b46a36c0 JZ |
35 | struct regmap *map = (i2c == chip->client) ? chip->regmap |
36 | : chip->regmap_companion; | |
bbd51b1f HZ |
37 | int ret; |
38 | ||
b46a36c0 | 39 | ret = regmap_write(map, reg, data); |
bbd51b1f HZ |
40 | return ret; |
41 | } | |
53dbab7a | 42 | EXPORT_SYMBOL(pm860x_reg_write); |
bbd51b1f | 43 | |
53dbab7a | 44 | int pm860x_bulk_read(struct i2c_client *i2c, int reg, |
bbd51b1f HZ |
45 | int count, unsigned char *buf) |
46 | { | |
53dbab7a | 47 | struct pm860x_chip *chip = i2c_get_clientdata(i2c); |
b46a36c0 JZ |
48 | struct regmap *map = (i2c == chip->client) ? chip->regmap |
49 | : chip->regmap_companion; | |
bbd51b1f HZ |
50 | int ret; |
51 | ||
b46a36c0 | 52 | ret = regmap_raw_read(map, reg, buf, count); |
bbd51b1f HZ |
53 | return ret; |
54 | } | |
53dbab7a | 55 | EXPORT_SYMBOL(pm860x_bulk_read); |
bbd51b1f | 56 | |
53dbab7a | 57 | int pm860x_bulk_write(struct i2c_client *i2c, int reg, |
bbd51b1f HZ |
58 | int count, unsigned char *buf) |
59 | { | |
53dbab7a | 60 | struct pm860x_chip *chip = i2c_get_clientdata(i2c); |
b46a36c0 JZ |
61 | struct regmap *map = (i2c == chip->client) ? chip->regmap |
62 | : chip->regmap_companion; | |
bbd51b1f HZ |
63 | int ret; |
64 | ||
b46a36c0 | 65 | ret = regmap_raw_write(map, reg, buf, count); |
bbd51b1f HZ |
66 | return ret; |
67 | } | |
53dbab7a | 68 | EXPORT_SYMBOL(pm860x_bulk_write); |
bbd51b1f | 69 | |
53dbab7a | 70 | int pm860x_set_bits(struct i2c_client *i2c, int reg, |
bbd51b1f HZ |
71 | unsigned char mask, unsigned char data) |
72 | { | |
53dbab7a | 73 | struct pm860x_chip *chip = i2c_get_clientdata(i2c); |
b46a36c0 JZ |
74 | struct regmap *map = (i2c == chip->client) ? chip->regmap |
75 | : chip->regmap_companion; | |
bbd51b1f HZ |
76 | int ret; |
77 | ||
b46a36c0 | 78 | ret = regmap_update_bits(map, reg, mask, data); |
bbd51b1f HZ |
79 | return ret; |
80 | } | |
53dbab7a | 81 | EXPORT_SYMBOL(pm860x_set_bits); |
bbd51b1f | 82 | |
5bdf7411 JZ |
83 | static int read_device(struct i2c_client *i2c, int reg, |
84 | int bytes, void *dest) | |
85 | { | |
86 | unsigned char msgbuf0[I2C_SMBUS_BLOCK_MAX + 3]; | |
87 | unsigned char msgbuf1[I2C_SMBUS_BLOCK_MAX + 2]; | |
88 | struct i2c_adapter *adap = i2c->adapter; | |
48942222 S |
89 | struct i2c_msg msg[2] = { |
90 | { | |
91 | .addr = i2c->addr, | |
92 | .flags = 0, | |
93 | .len = 1, | |
94 | .buf = msgbuf0 | |
95 | }, | |
96 | { .addr = i2c->addr, | |
97 | .flags = I2C_M_RD, | |
98 | .len = 0, | |
99 | .buf = msgbuf1 | |
100 | }, | |
5bdf7411 JZ |
101 | }; |
102 | int num = 1, ret = 0; | |
103 | ||
104 | if (dest == NULL) | |
105 | return -EINVAL; | |
106 | msgbuf0[0] = (unsigned char)reg; /* command */ | |
107 | msg[1].len = bytes; | |
108 | ||
109 | /* if data needs to read back, num should be 2 */ | |
110 | if (bytes > 0) | |
111 | num = 2; | |
112 | ret = adap->algo->master_xfer(adap, msg, num); | |
113 | memcpy(dest, msgbuf1, bytes); | |
114 | if (ret < 0) | |
115 | return ret; | |
116 | return 0; | |
117 | } | |
118 | ||
119 | static int write_device(struct i2c_client *i2c, int reg, | |
120 | int bytes, void *src) | |
121 | { | |
7a36ceb2 | 122 | unsigned char buf[2]; |
5bdf7411 JZ |
123 | struct i2c_adapter *adap = i2c->adapter; |
124 | struct i2c_msg msg; | |
125 | int ret; | |
126 | ||
127 | buf[0] = (unsigned char)reg; | |
128 | memcpy(&buf[1], src, bytes); | |
129 | msg.addr = i2c->addr; | |
130 | msg.flags = 0; | |
131 | msg.len = bytes + 1; | |
132 | msg.buf = buf; | |
133 | ||
134 | ret = adap->algo->master_xfer(adap, &msg, 1); | |
135 | if (ret < 0) | |
136 | return ret; | |
137 | return 0; | |
138 | } | |
139 | ||
09b03419 HZ |
140 | int pm860x_page_reg_write(struct i2c_client *i2c, int reg, |
141 | unsigned char data) | |
142 | { | |
09b03419 HZ |
143 | unsigned char zero; |
144 | int ret; | |
145 | ||
8c8f74f3 | 146 | i2c_lock_bus(i2c->adapter, I2C_LOCK_SEGMENT); |
5bdf7411 JZ |
147 | read_device(i2c, 0xFA, 0, &zero); |
148 | read_device(i2c, 0xFB, 0, &zero); | |
149 | read_device(i2c, 0xFF, 0, &zero); | |
150 | ret = write_device(i2c, reg, 1, &data); | |
151 | read_device(i2c, 0xFE, 0, &zero); | |
152 | read_device(i2c, 0xFC, 0, &zero); | |
8c8f74f3 | 153 | i2c_unlock_bus(i2c->adapter, I2C_LOCK_SEGMENT); |
09b03419 HZ |
154 | return ret; |
155 | } | |
156 | EXPORT_SYMBOL(pm860x_page_reg_write); | |
157 | ||
158 | int pm860x_page_bulk_read(struct i2c_client *i2c, int reg, | |
159 | int count, unsigned char *buf) | |
160 | { | |
09b03419 HZ |
161 | unsigned char zero = 0; |
162 | int ret; | |
163 | ||
8c8f74f3 | 164 | i2c_lock_bus(i2c->adapter, I2C_LOCK_SEGMENT); |
5bdf7411 JZ |
165 | read_device(i2c, 0xfa, 0, &zero); |
166 | read_device(i2c, 0xfb, 0, &zero); | |
167 | read_device(i2c, 0xff, 0, &zero); | |
168 | ret = read_device(i2c, reg, count, buf); | |
169 | read_device(i2c, 0xFE, 0, &zero); | |
170 | read_device(i2c, 0xFC, 0, &zero); | |
8c8f74f3 | 171 | i2c_unlock_bus(i2c->adapter, I2C_LOCK_SEGMENT); |
09b03419 HZ |
172 | return ret; |
173 | } | |
174 | EXPORT_SYMBOL(pm860x_page_bulk_read); |