2 * rl6347a.c - RL6347A class device shared support
4 * Copyright 2015 Realtek Semiconductor Corp.
6 * Author: Oder Chiou <oder_chiou@realtek.com>
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 as
10 * published by the Free Software Foundation.
13 #include <linux/module.h>
14 #include <linux/moduleparam.h>
15 #include <linux/init.h>
16 #include <linux/delay.h>
18 #include <linux/i2c.h>
19 #include <linux/platform_device.h>
20 #include <linux/spi/spi.h>
21 #include <linux/dmi.h>
22 #include <linux/acpi.h>
23 #include <sound/core.h>
24 #include <sound/pcm.h>
25 #include <sound/pcm_params.h>
26 #include <sound/soc.h>
27 #include <sound/soc-dapm.h>
28 #include <sound/initval.h>
29 #include <sound/tlv.h>
30 #include <sound/jack.h>
31 #include <linux/workqueue.h>
32 #include <sound/hda_verbs.h>
36 int rl6347a_hw_write(void *context, unsigned int reg, unsigned int value)
38 struct i2c_client *client = context;
39 struct rl6347a_priv *rl6347a = i2c_get_clientdata(client);
43 /* handle index registers */
45 rl6347a_hw_write(client, RL6347A_COEF_INDEX, reg);
46 for (i = 0; i < rl6347a->index_cache_size; i++) {
47 if (reg == rl6347a->index_cache[i].reg) {
48 rl6347a->index_cache[i].def = value;
53 reg = RL6347A_PROC_COEF;
56 data[0] = (reg >> 24) & 0xff;
57 data[1] = (reg >> 16) & 0xff;
59 * 4 bit VID: reg should be 0
60 * 12 bit VID: value should be 0
61 * So we use an OR operator to handle it rather than use if condition.
63 data[2] = ((reg >> 8) & 0xff) | ((value >> 8) & 0xff);
64 data[3] = value & 0xff;
66 ret = i2c_master_send(client, data, 4);
71 pr_err("ret=%d\n", ret);
77 EXPORT_SYMBOL_GPL(rl6347a_hw_write);
79 int rl6347a_hw_read(void *context, unsigned int reg, unsigned int *value)
81 struct i2c_client *client = context;
82 struct i2c_msg xfer[2];
85 unsigned int index, vid, buf = 0x0;
87 /* handle index registers */
89 rl6347a_hw_write(client, RL6347A_COEF_INDEX, reg);
90 reg = RL6347A_PROC_COEF;
94 vid = (reg >> 8) & 0xfff;
96 if (AC_VERB_GET_AMP_GAIN_MUTE == (vid & 0xf00)) {
97 index = (reg >> 8) & 0xf;
98 reg = (reg & ~0xf0f) | index;
100 be_reg = cpu_to_be32(reg);
103 xfer[0].addr = client->addr;
106 xfer[0].buf = (u8 *)&be_reg;
109 xfer[1].addr = client->addr;
110 xfer[1].flags = I2C_M_RD;
112 xfer[1].buf = (u8 *)&buf;
114 ret = i2c_transfer(client->adapter, xfer, 2);
120 *value = be32_to_cpu(buf);
124 EXPORT_SYMBOL_GPL(rl6347a_hw_read);
126 MODULE_DESCRIPTION("RL6347A class device shared support");
127 MODULE_AUTHOR("Oder Chiou <oder_chiou@realtek.com>");
128 MODULE_LICENSE("GPL v2");