projects / thirdparty / u-boot.git / blame
| Commit | Line | Data |
|---|---|---|
| 0ab6f0b3 SG |
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 | ||
| d678a59d | 8 | #include <common.h> |
| 0ab6f0b3 SG |
9 | #include <div64.h> |
| 10 | #include <i2c.h> | |
| 11 | #include <i2s.h> | |
| f7ae49fc | 12 | #include <log.h> |
| 0ab6f0b3 SG |
13 | #include <sound.h> |
| 14 | #include <asm/gpio.h> | |
| 15 | #include <asm/io.h> | |
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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 | * | |
| 185f812c | 25 | * Return: int value 1 for change, 0 for no change or negative error code. |
| 0ab6f0b3 SG |
26 | */ |
| 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 | * | |
| 185f812c | 42 | * Return: int value 0 for success, -1 in case of error. |
| 0ab6f0b3 SG |
43 | */ |
| 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 | * | |
| 185f812c | 67 | * Return: int value 0 for success, non-zero error code. |
| 0ab6f0b3 SG |
68 | */ |
| 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 | } |