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
|
/*****************************************************************************
* Copyright 2011 Broadcom Corporation. All rights reserved.
*
* Unless you and Broadcom execute a separate written software license
* agreement governing use of this software, this software is licensed to you
* under the terms of the GNU General Public License version 2, available at
* http://www.broadcom.com/licenses/GPLv2.php (the "GPL").
*
* Notwithstanding the above, under no circumstances may you combine this
* software in any way with any other Broadcom software provided under a
* license other than the GPL, without Broadcom's express prior written
* consent.
*****************************************************************************/
#ifndef __SOUND_ARM_BCM2835_H
#define __SOUND_ARM_BCM2835_H
#include <linux/device.h>
#include <linux/list.h>
#include <linux/interrupt.h>
#include <linux/wait.h>
#include <sound/core.h>
#include <sound/initval.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>
#include <sound/pcm-indirect.h>
#include <linux/workqueue.h>
/*
#define AUDIO_DEBUG_ENABLE
#define AUDIO_VERBOSE_DEBUG_ENABLE
*/
/* Debug macros */
#ifdef AUDIO_DEBUG_ENABLE
#ifdef AUDIO_VERBOSE_DEBUG_ENABLE
#define audio_debug(fmt, arg...) \
printk(KERN_INFO"%s:%d " fmt, __func__, __LINE__, ##arg)
#define audio_info(fmt, arg...) \
printk(KERN_INFO"%s:%d " fmt, __func__, __LINE__, ##arg)
#else
#define audio_debug(fmt, arg...)
#define audio_info(fmt, arg...)
#endif /* AUDIO_VERBOSE_DEBUG_ENABLE */
#else
#define audio_debug(fmt, arg...)
#define audio_info(fmt, arg...)
#endif /* AUDIO_DEBUG_ENABLE */
#define audio_error(fmt, arg...) \
printk(KERN_ERR"%s:%d " fmt, __func__, __LINE__, ##arg)
#define audio_warning(fmt, arg...) \
printk(KERN_WARNING"%s:%d " fmt, __func__, __LINE__, ##arg)
#define audio_alert(fmt, arg...) \
printk(KERN_ALERT"%s:%d " fmt, __func__, __LINE__, ##arg)
#define MAX_SUBSTREAMS (8)
#define AVAIL_SUBSTREAMS_MASK (0xff)
enum {
CTRL_VOL_MUTE,
CTRL_VOL_UNMUTE
};
/* macros for alsa2chip and chip2alsa, instead of functions */
#define alsa2chip(vol) (uint)(-((vol << 8) / 100)) /* convert alsa to chip volume (defined as macro rather than function call) */
#define chip2alsa(vol) -((vol * 100) >> 8) /* convert chip to alsa volume */
/* Some constants for values .. */
enum snd_bcm2835_route {
AUDIO_DEST_AUTO = 0,
AUDIO_DEST_HEADPHONES = 1,
AUDIO_DEST_HDMI = 2,
AUDIO_DEST_MAX,
};
enum snd_bcm2835_ctrl {
PCM_PLAYBACK_VOLUME,
PCM_PLAYBACK_MUTE,
PCM_PLAYBACK_DEVICE,
};
/* definition of the chip-specific record */
struct bcm2835_chip {
struct snd_card *card;
struct snd_pcm *pcm;
struct snd_pcm *pcm_spdif;
/* Bitmat for valid reg_base and irq numbers */
unsigned int avail_substreams;
struct platform_device *pdev[MAX_SUBSTREAMS];
struct bcm2835_alsa_stream *alsa_stream[MAX_SUBSTREAMS];
int volume;
int old_volume; /* stores the volume value whist muted */
int dest;
int mute;
unsigned int opened;
unsigned int spdif_status;
struct mutex audio_mutex;
};
struct bcm2835_alsa_stream {
struct bcm2835_chip *chip;
struct snd_pcm_substream *substream;
struct snd_pcm_indirect pcm_indirect;
struct semaphore buffers_update_sem;
struct semaphore control_sem;
spinlock_t lock;
volatile unsigned int control;
volatile unsigned int status;
int open;
int running;
int draining;
int channels;
int params_rate;
int pcm_format_width;
unsigned int pos;
unsigned int buffer_size;
unsigned int period_size;
atomic_t retrieved;
struct bcm2835_audio_instance *instance;
struct workqueue_struct *my_wq;
int idx;
};
int snd_bcm2835_new_ctl(struct bcm2835_chip *chip);
int snd_bcm2835_new_pcm(struct bcm2835_chip *chip);
int snd_bcm2835_new_spdif_pcm(struct bcm2835_chip *chip);
int bcm2835_audio_open(struct bcm2835_alsa_stream *alsa_stream);
int bcm2835_audio_close(struct bcm2835_alsa_stream *alsa_stream);
int bcm2835_audio_set_params(struct bcm2835_alsa_stream *alsa_stream,
unsigned int channels, unsigned int samplerate,
unsigned int bps);
int bcm2835_audio_setup(struct bcm2835_alsa_stream *alsa_stream);
int bcm2835_audio_start(struct bcm2835_alsa_stream *alsa_stream);
int bcm2835_audio_stop(struct bcm2835_alsa_stream *alsa_stream);
int bcm2835_audio_set_ctls(struct bcm2835_chip *chip);
int bcm2835_audio_write(struct bcm2835_alsa_stream *alsa_stream,
unsigned int count,
void *src);
void bcm2835_playback_fifo(struct bcm2835_alsa_stream *alsa_stream);
unsigned int bcm2835_audio_retrieve_buffers(struct bcm2835_alsa_stream *alsa_stream);
void bcm2835_audio_flush_buffers(struct bcm2835_alsa_stream *alsa_stream);
void bcm2835_audio_flush_playback_buffers(struct bcm2835_alsa_stream *alsa_stream);
#endif /* __SOUND_ARM_BCM2835_H */
|
