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 <log.h>
13 #include <sound.h>
14 #include <asm/gpio.h>
15 #include <asm/io.h>
16 #include "maxim_codec.h"
17
18 /*
19 * Writes value to a device register through i2c
20 *
21 * @param priv Private data for driver
22 * @param reg reg number to be write
23 * @param data data to be writen to the above registor
24 *
25 * @return int value 1 for change, 0 for no change or negative error code.
26 */
maxim_i2c_write(struct maxim_priv * priv,unsigned int reg,unsigned char data)27 int maxim_i2c_write(struct maxim_priv *priv, unsigned int reg,
28 unsigned char data)
29 {
30 debug("%s: Write Addr : 0x%02X, Data : 0x%02X\n",
31 __func__, reg, data);
32 return dm_i2c_write(priv->dev, reg, &data, 1);
33 }
34
35 /*
36 * Read a value from a device register through i2c
37 *
38 * @param priv Private data for driver
39 * @param reg reg number to be read
40 * @param data address of read data to be stored
41 *
42 * @return int value 0 for success, -1 in case of error.
43 */
maxim_i2c_read(struct maxim_priv * priv,unsigned int reg,unsigned char * data)44 unsigned int maxim_i2c_read(struct maxim_priv *priv, unsigned int reg,
45 unsigned char *data)
46 {
47 int ret;
48
49 return dm_i2c_read(priv->dev, reg, data, 1);
50 if (ret != 0) {
51 debug("%s: Error while reading register %#04x\n",
52 __func__, reg);
53 return -1;
54 }
55
56 return 0;
57 }
58
59 /*
60 * update device register bits through i2c
61 *
62 * @param priv Private data for driver
63 * @param reg codec register
64 * @param mask register mask
65 * @param value new value
66 *
67 * @return int value 0 for success, non-zero error code.
68 */
maxim_bic_or(struct maxim_priv * priv,unsigned int reg,unsigned char mask,unsigned char value)69 int maxim_bic_or(struct maxim_priv *priv, unsigned int reg, unsigned char mask,
70 unsigned char value)
71 {
72 int change, ret = 0;
73 unsigned char old, new;
74
75 if (maxim_i2c_read(priv, reg, &old) != 0)
76 return -1;
77 new = (old & ~mask) | (value & mask);
78 change = (old != new) ? 1 : 0;
79 if (change)
80 ret = maxim_i2c_write(priv, reg, new);
81 if (ret < 0)
82 return ret;
83
84 return change;
85 }
86