1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
|
// SPDX-License-Identifier: GPL-2.0-only
//
// rt-sdw-common.c
//
// Copyright(c) 2024 Realtek Semiconductor Corp.
//
/*
* This file defines common functions used with Realtek soundwire codecs.
*/
#include <linux/module.h>
#include <linux/regmap.h>
#include <linux/bitops.h>
#include <linux/soundwire/sdw_registers.h>
#include <sound/jack.h>
#include "rt-sdw-common.h"
/**
* rt_sdca_index_write - Write a value to Realtek defined register.
*
* @map: map for setting.
* @nid: Realtek-defined ID.
* @reg: register.
* @value: value.
*
* A value of zero will be returned on success, a negative errno will
* be returned in error cases.
*/
int rt_sdca_index_write(struct regmap *map, unsigned int nid,
unsigned int reg, unsigned int value)
{
unsigned int addr = (nid << 20) | reg;
int ret;
ret = regmap_write(map, addr, value);
if (ret < 0)
pr_err("Failed to set value: %06x <= %04x ret=%d\n",
addr, value, ret);
return ret;
}
EXPORT_SYMBOL_GPL(rt_sdca_index_write);
/**
* rt_sdca_index_read - Read value from Realtek defined register.
*
* @map: map for setting.
* @nid: Realtek-defined ID.
* @reg: register.
* @value: value.
*
* A value of zero will be returned on success, a negative errno will
* be returned in error cases.
*/
int rt_sdca_index_read(struct regmap *map, unsigned int nid,
unsigned int reg, unsigned int *value)
{
unsigned int addr = (nid << 20) | reg;
int ret;
ret = regmap_read(map, addr, value);
if (ret < 0)
pr_err("Failed to get value: %06x => %04x ret=%d\n",
addr, *value, ret);
return ret;
}
EXPORT_SYMBOL_GPL(rt_sdca_index_read);
/**
* rt_sdca_index_update_bits - Update value on Realtek defined register.
*
* @map: map for setting.
* @nid: Realtek-defined ID.
* @reg: register.
* @mask: Bitmask to change
* @val: New value for bitmask
*
* A value of zero will be returned on success, a negative errno will
* be returned in error cases.
*/
int rt_sdca_index_update_bits(struct regmap *map,
unsigned int nid, unsigned int reg, unsigned int mask, unsigned int val)
{
unsigned int tmp;
int ret;
ret = rt_sdca_index_read(map, nid, reg, &tmp);
if (ret < 0)
return ret;
set_mask_bits(&tmp, mask, val);
return rt_sdca_index_write(map, nid, reg, tmp);
}
EXPORT_SYMBOL_GPL(rt_sdca_index_update_bits);
/**
* rt_sdca_btn_type - Decision of button type.
*
* @buffer: UMP message buffer.
*
* A button type will be returned regarding to buffer,
* it returns zero if buffer cannot be recognized.
*/
int rt_sdca_btn_type(unsigned char *buffer)
{
u8 btn_type = 0;
int ret = 0;
btn_type |= buffer[0] & 0xf;
btn_type |= (buffer[0] >> 4) & 0xf;
btn_type |= buffer[1] & 0xf;
btn_type |= (buffer[1] >> 4) & 0xf;
if (btn_type & BIT(0))
ret |= SND_JACK_BTN_2;
if (btn_type & BIT(1))
ret |= SND_JACK_BTN_3;
if (btn_type & BIT(2))
ret |= SND_JACK_BTN_0;
if (btn_type & BIT(3))
ret |= SND_JACK_BTN_1;
return ret;
}
EXPORT_SYMBOL_GPL(rt_sdca_btn_type);
/**
* rt_sdca_headset_detect - Headset jack type detection.
*
* @map: map for setting.
* @entity_id: SDCA entity ID.
*
* A headset jack type will be returned, a negative errno will
* be returned in error cases.
*/
int rt_sdca_headset_detect(struct regmap *map, unsigned int entity_id)
{
unsigned int det_mode, jack_type;
int ret;
/* get detected_mode */
ret = regmap_read(map, SDW_SDCA_CTL(SDCA_NUM_JACK_CODEC, entity_id,
RT_SDCA_CTL_DETECTED_MODE, 0), &det_mode);
if (ret < 0)
goto io_error;
switch (det_mode) {
case 0x03:
jack_type = SND_JACK_HEADPHONE;
break;
case 0x05:
jack_type = SND_JACK_HEADSET;
break;
default:
jack_type = 0;
break;
}
/* write selected_mode */
if (det_mode) {
ret = regmap_write(map, SDW_SDCA_CTL(SDCA_NUM_JACK_CODEC, entity_id,
RT_SDCA_CTL_SELECTED_MODE, 0), det_mode);
if (ret < 0)
goto io_error;
}
return jack_type;
io_error:
pr_err_ratelimited("IO error in %s, ret %d\n", __func__, ret);
return ret;
}
EXPORT_SYMBOL_GPL(rt_sdca_headset_detect);
/**
* rt_sdca_button_detect - Read UMP message and decide button type.
*
* @map: map for setting.
* @entity_id: SDCA entity ID.
* @hid_buf_addr: HID buffer address.
* @hid_id: Report ID for HID.
*
* A button type will be returned regarding to buffer,
* it returns zero if buffer cannot be recognized.
*/
int rt_sdca_button_detect(struct regmap *map, unsigned int entity_id,
unsigned int hid_buf_addr, unsigned int hid_id)
{
unsigned int btn_type = 0, offset, idx, val, owner;
unsigned char buf[3];
int ret;
/* get current UMP message owner */
ret = regmap_read(map, SDW_SDCA_CTL(SDCA_NUM_HID, entity_id,
RT_SDCA_CTL_HIDTX_CURRENT_OWNER, 0), &owner);
if (ret < 0)
return 0;
/* if owner is device then there is no button event from device */
if (owner == 1)
return 0;
/* read UMP message offset */
ret = regmap_read(map, SDW_SDCA_CTL(SDCA_NUM_HID, entity_id,
RT_SDCA_CTL_HIDTX_MESSAGE_OFFSET, 0), &offset);
if (ret < 0)
goto _end_btn_det_;
for (idx = 0; idx < sizeof(buf); idx++) {
ret = regmap_read(map, hid_buf_addr + offset + idx, &val);
if (ret < 0)
goto _end_btn_det_;
buf[idx] = val & 0xff;
}
/* Report ID for HID */
if (buf[0] == hid_id)
btn_type = rt_sdca_btn_type(&buf[1]);
_end_btn_det_:
/* Host is owner, so set back to device */
if (owner == 0)
/* set owner to device */
regmap_write(map,
SDW_SDCA_CTL(SDCA_NUM_HID, entity_id,
RT_SDCA_CTL_HIDTX_CURRENT_OWNER, 0), 0x01);
return btn_type;
}
EXPORT_SYMBOL_GPL(rt_sdca_button_detect);
MODULE_DESCRIPTION("Realtek soundwire common functions");
MODULE_AUTHOR("jack yu <jack.yu@realtek.com>");
MODULE_LICENSE("GPL");
|
