1 // SPDX-License-Identifier: GPL-2.0
2 /*
3 * maxim_codec.c -- MAXIM CODEC Common driver
4 *
5 * Copyright 2011 Maxim Integrated Products
6 */
7
8 #include <common.h>
9 #include <div64.h>
10 #include <i2c.h>
11 #include <i2s.h>
12 #include <sound.h>
13 #include <asm/gpio.h>
14 #include <asm/io.h>
15 #include "maxim_codec.h"
16
17 /*
18 * Writes value to a device register through i2c
19 *
20 * @param priv Private data for driver
21 * @param reg reg number to be write
22 * @param data data to be writen to the above registor
23 *
24 * @return int value 1 for change, 0 for no change or negative error code.
25 */
maxim_i2c_write(struct maxim_priv * priv,unsigned int reg,unsigned char data)26 int maxim_i2c_write(struct maxim_priv *priv, unsigned int reg,
27 unsigned char data)
28 {
29 debug("%s: Write Addr : 0x%02X, Data : 0x%02X\n",
30 __func__, reg, data);
31 return dm_i2c_write(priv->dev, reg, &data, 1);
32 }
33
34 /*
35 * Read a value from a device register through i2c
36 *
37 * @param priv Private data for driver
38 * @param reg reg number to be read
39 * @param data address of read data to be stored
40 *
41 * @return int value 0 for success, -1 in case of error.
42 */
maxim_i2c_read(struct maxim_priv * priv,unsigned int reg,unsigned char * data)43 unsigned int maxim_i2c_read(struct maxim_priv *priv, unsigned int reg,
44 unsigned char *data)
45 {
46 int ret;
47
48 return dm_i2c_read(priv->dev, reg, data, 1);
49 if (ret != 0) {
50 debug("%s: Error while reading register %#04x\n",
51 __func__, reg);
52 return -1;
53 }
54
55 return 0;
56 }
57
58 /*
59 * update device register bits through i2c
60 *
61 * @param priv Private data for driver
62 * @param reg codec register
63 * @param mask register mask
64 * @param value new value
65 *
66 * @return int value 0 for success, non-zero error code.
67 */
maxim_bic_or(struct maxim_priv * priv,unsigned int reg,unsigned char mask,unsigned char value)68 int maxim_bic_or(struct maxim_priv *priv, unsigned int reg, unsigned char mask,
69 unsigned char value)
70 {
71 int change, ret = 0;
72 unsigned char old, new;
73
74 if (maxim_i2c_read(priv, reg, &old) != 0)
75 return -1;
76 new = (old & ~mask) | (value & mask);
77 change = (old != new) ? 1 : 0;
78 if (change)
79 ret = maxim_i2c_write(priv, reg, new);
80 if (ret < 0)
81 return ret;
82
83 return change;
84 }
85