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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 18:49:45 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 18:49:45 +0000 |
commit | 2c3c1048746a4622d8c89a29670120dc8fab93c4 (patch) | |
tree | 848558de17fb3008cdf4d861b01ac7781903ce39 /sound/soc/codecs/rl6347a.c | |
parent | Initial commit. (diff) | |
download | linux-upstream.tar.xz linux-upstream.zip |
Adding upstream version 6.1.76.upstream/6.1.76upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'sound/soc/codecs/rl6347a.c')
-rw-r--r-- | sound/soc/codecs/rl6347a.c | 108 |
1 files changed, 108 insertions, 0 deletions
diff --git a/sound/soc/codecs/rl6347a.c b/sound/soc/codecs/rl6347a.c new file mode 100644 index 000000000..fa8ac3454 --- /dev/null +++ b/sound/soc/codecs/rl6347a.c @@ -0,0 +1,108 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * rl6347a.c - RL6347A class device shared support + * + * Copyright 2015 Realtek Semiconductor Corp. + * + * Author: Oder Chiou <oder_chiou@realtek.com> + */ + +#include <linux/module.h> +#include <linux/i2c.h> +#include <linux/regmap.h> + +#include "rl6347a.h" + +int rl6347a_hw_write(void *context, unsigned int reg, unsigned int value) +{ + struct i2c_client *client = context; + struct rl6347a_priv *rl6347a = i2c_get_clientdata(client); + u8 data[4]; + int ret, i; + + /* handle index registers */ + if (reg <= 0xff) { + rl6347a_hw_write(client, RL6347A_COEF_INDEX, reg); + for (i = 0; i < rl6347a->index_cache_size; i++) { + if (reg == rl6347a->index_cache[i].reg) { + rl6347a->index_cache[i].def = value; + break; + } + + } + reg = RL6347A_PROC_COEF; + } + + data[0] = (reg >> 24) & 0xff; + data[1] = (reg >> 16) & 0xff; + /* + * 4 bit VID: reg should be 0 + * 12 bit VID: value should be 0 + * So we use an OR operator to handle it rather than use if condition. + */ + data[2] = ((reg >> 8) & 0xff) | ((value >> 8) & 0xff); + data[3] = value & 0xff; + + ret = i2c_master_send(client, data, 4); + + if (ret == 4) + return 0; + else + dev_err(&client->dev, "I2C error %d\n", ret); + if (ret < 0) + return ret; + else + return -EIO; +} +EXPORT_SYMBOL_GPL(rl6347a_hw_write); + +int rl6347a_hw_read(void *context, unsigned int reg, unsigned int *value) +{ + struct i2c_client *client = context; + struct i2c_msg xfer[2]; + int ret; + __be32 be_reg, buf = 0x0; + unsigned int index, vid; + + /* handle index registers */ + if (reg <= 0xff) { + rl6347a_hw_write(client, RL6347A_COEF_INDEX, reg); + reg = RL6347A_PROC_COEF; + } + + reg = reg | 0x80000; + vid = (reg >> 8) & 0xfff; + + if (AC_VERB_GET_AMP_GAIN_MUTE == (vid & 0xf00)) { + index = (reg >> 8) & 0xf; + reg = (reg & ~0xf0f) | index; + } + be_reg = cpu_to_be32(reg); + + /* Write register */ + xfer[0].addr = client->addr; + xfer[0].flags = 0; + xfer[0].len = 4; + xfer[0].buf = (u8 *)&be_reg; + + /* Read data */ + xfer[1].addr = client->addr; + xfer[1].flags = I2C_M_RD; + xfer[1].len = 4; + xfer[1].buf = (u8 *)&buf; + + ret = i2c_transfer(client->adapter, xfer, 2); + if (ret < 0) + return ret; + else if (ret != 2) + return -EIO; + + *value = be32_to_cpu(buf); + + return 0; +} +EXPORT_SYMBOL_GPL(rl6347a_hw_read); + +MODULE_DESCRIPTION("RL6347A class device shared support"); +MODULE_AUTHOR("Oder Chiou <oder_chiou@realtek.com>"); +MODULE_LICENSE("GPL v2"); |