1 // SPDX-License-Identifier: GPL-2.0-only <<
2 /* 1 /*
3 * rl6347a.c - RL6347A class device shared sup 2 * rl6347a.c - RL6347A class device shared support
4 * 3 *
5 * Copyright 2015 Realtek Semiconductor Corp. 4 * Copyright 2015 Realtek Semiconductor Corp.
6 * 5 *
7 * Author: Oder Chiou <oder_chiou@realtek.com> 6 * Author: Oder Chiou <oder_chiou@realtek.com>
>> 7 *
>> 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.
8 */ 11 */
9 12
10 #include <linux/module.h> 13 #include <linux/module.h>
11 #include <linux/i2c.h> 14 #include <linux/i2c.h>
12 #include <linux/regmap.h> 15 #include <linux/regmap.h>
13 16
14 #include "rl6347a.h" 17 #include "rl6347a.h"
15 18
16 int rl6347a_hw_write(void *context, unsigned i 19 int rl6347a_hw_write(void *context, unsigned int reg, unsigned int value)
17 { 20 {
18 struct i2c_client *client = context; 21 struct i2c_client *client = context;
19 struct rl6347a_priv *rl6347a = i2c_get 22 struct rl6347a_priv *rl6347a = i2c_get_clientdata(client);
20 u8 data[4]; 23 u8 data[4];
21 int ret, i; 24 int ret, i;
22 25
23 /* handle index registers */ 26 /* handle index registers */
24 if (reg <= 0xff) { 27 if (reg <= 0xff) {
25 rl6347a_hw_write(client, RL634 28 rl6347a_hw_write(client, RL6347A_COEF_INDEX, reg);
26 for (i = 0; i < rl6347a->index 29 for (i = 0; i < rl6347a->index_cache_size; i++) {
27 if (reg == rl6347a->in 30 if (reg == rl6347a->index_cache[i].reg) {
28 rl6347a->index 31 rl6347a->index_cache[i].def = value;
29 break; 32 break;
30 } 33 }
31 34
32 } 35 }
33 reg = RL6347A_PROC_COEF; 36 reg = RL6347A_PROC_COEF;
34 } 37 }
35 38
36 data[0] = (reg >> 24) & 0xff; 39 data[0] = (reg >> 24) & 0xff;
37 data[1] = (reg >> 16) & 0xff; 40 data[1] = (reg >> 16) & 0xff;
38 /* 41 /*
39 * 4 bit VID: reg should be 0 42 * 4 bit VID: reg should be 0
40 * 12 bit VID: value should be 0 43 * 12 bit VID: value should be 0
41 * So we use an OR operator to handle 44 * So we use an OR operator to handle it rather than use if condition.
42 */ 45 */
43 data[2] = ((reg >> 8) & 0xff) | ((valu 46 data[2] = ((reg >> 8) & 0xff) | ((value >> 8) & 0xff);
44 data[3] = value & 0xff; 47 data[3] = value & 0xff;
45 48
46 ret = i2c_master_send(client, data, 4) 49 ret = i2c_master_send(client, data, 4);
47 50
48 if (ret == 4) 51 if (ret == 4)
49 return 0; 52 return 0;
50 else 53 else
51 dev_err(&client->dev, "I2C err 54 dev_err(&client->dev, "I2C error %d\n", ret);
52 if (ret < 0) 55 if (ret < 0)
53 return ret; 56 return ret;
54 else 57 else
55 return -EIO; 58 return -EIO;
56 } 59 }
57 EXPORT_SYMBOL_GPL(rl6347a_hw_write); 60 EXPORT_SYMBOL_GPL(rl6347a_hw_write);
58 61
59 int rl6347a_hw_read(void *context, unsigned in 62 int rl6347a_hw_read(void *context, unsigned int reg, unsigned int *value)
60 { 63 {
61 struct i2c_client *client = context; 64 struct i2c_client *client = context;
62 struct i2c_msg xfer[2]; 65 struct i2c_msg xfer[2];
63 int ret; 66 int ret;
64 __be32 be_reg, buf = 0x0; 67 __be32 be_reg, buf = 0x0;
65 unsigned int index, vid; 68 unsigned int index, vid;
66 69
67 /* handle index registers */ 70 /* handle index registers */
68 if (reg <= 0xff) { 71 if (reg <= 0xff) {
69 rl6347a_hw_write(client, RL634 72 rl6347a_hw_write(client, RL6347A_COEF_INDEX, reg);
70 reg = RL6347A_PROC_COEF; 73 reg = RL6347A_PROC_COEF;
71 } 74 }
72 75
73 reg = reg | 0x80000; 76 reg = reg | 0x80000;
74 vid = (reg >> 8) & 0xfff; 77 vid = (reg >> 8) & 0xfff;
75 78
76 if (AC_VERB_GET_AMP_GAIN_MUTE == (vid 79 if (AC_VERB_GET_AMP_GAIN_MUTE == (vid & 0xf00)) {
77 index = (reg >> 8) & 0xf; 80 index = (reg >> 8) & 0xf;
78 reg = (reg & ~0xf0f) | index; 81 reg = (reg & ~0xf0f) | index;
79 } 82 }
80 be_reg = cpu_to_be32(reg); 83 be_reg = cpu_to_be32(reg);
81 84
82 /* Write register */ 85 /* Write register */
83 xfer[0].addr = client->addr; 86 xfer[0].addr = client->addr;
84 xfer[0].flags = 0; 87 xfer[0].flags = 0;
85 xfer[0].len = 4; 88 xfer[0].len = 4;
86 xfer[0].buf = (u8 *)&be_reg; 89 xfer[0].buf = (u8 *)&be_reg;
87 90
88 /* Read data */ 91 /* Read data */
89 xfer[1].addr = client->addr; 92 xfer[1].addr = client->addr;
90 xfer[1].flags = I2C_M_RD; 93 xfer[1].flags = I2C_M_RD;
91 xfer[1].len = 4; 94 xfer[1].len = 4;
92 xfer[1].buf = (u8 *)&buf; 95 xfer[1].buf = (u8 *)&buf;
93 96
94 ret = i2c_transfer(client->adapter, xf 97 ret = i2c_transfer(client->adapter, xfer, 2);
95 if (ret < 0) 98 if (ret < 0)
96 return ret; 99 return ret;
97 else if (ret != 2) 100 else if (ret != 2)
98 return -EIO; 101 return -EIO;
99 102
100 *value = be32_to_cpu(buf); 103 *value = be32_to_cpu(buf);
101 104
102 return 0; 105 return 0;
103 } 106 }
104 EXPORT_SYMBOL_GPL(rl6347a_hw_read); 107 EXPORT_SYMBOL_GPL(rl6347a_hw_read);
105 108
106 MODULE_DESCRIPTION("RL6347A class device share 109 MODULE_DESCRIPTION("RL6347A class device shared support");
107 MODULE_AUTHOR("Oder Chiou <oder_chiou@realtek. 110 MODULE_AUTHOR("Oder Chiou <oder_chiou@realtek.com>");
108 MODULE_LICENSE("GPL v2"); 111 MODULE_LICENSE("GPL v2");
109 112
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