1 /*
2 * Copyright (C) 2016 Intel Corporation
3 * Authors: Sailaja Bandarupalli <sailaja.bandarupalli@intel.com>
4 * Ramesh Babu K V <ramesh.babu@intel.com>
5 * Vaibhav Agarwal <vaibhav.agarwal@intel.com>
6 * Jerome Anand <jerome.anand@intel.com>
7 *
8 * Permission is hereby granted, free of charge, to any person obtaining
9 * a copy of this software and associated documentation files
10 * (the "Software"), to deal in the Software without restriction,
11 * including without limitation the rights to use, copy, modify, merge,
12 * publish, distribute, sublicense, and/or sell copies of the Software,
13 * and to permit persons to whom the Software is furnished to do so,
14 * subject to the following conditions:
15 *
16 * The above copyright notice and this permission notice (including the
17 * next paragraph) shall be included in all copies or substantial
18 * portions of the Software.
19 *
20 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
21 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
22 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
23 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
24 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
25 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
26 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
27 * SOFTWARE.
28 */
29
30 #ifndef _INTEL_HDMI_AUDIO_H_
31 #define _INTEL_HDMI_AUDIO_H_
32
33 #include "intel_hdmi_lpe_audio.h"
34
35 #define MAX_PB_STREAMS 1
36 #define MAX_CAP_STREAMS 0
37 #define BYTES_PER_WORD 0x4
38 #define INTEL_HAD "HdmiLpeAudio"
39
40 /*
41 * CEA speaker placement:
42 *
43 * FL FLC FC FRC FR
44 *
45 * LFE
46 *
47 * RL RLC RC RRC RR
48 *
49 * The Left/Right Surround channel _notions_ LS/RS in SMPTE 320M
50 * corresponds to CEA RL/RR; The SMPTE channel _assignment_ C/LFE is
51 * swapped to CEA LFE/FC.
52 */
53 enum cea_speaker_placement {
54 FL = (1 << 0), /* Front Left */
55 FC = (1 << 1), /* Front Center */
56 FR = (1 << 2), /* Front Right */
57 FLC = (1 << 3), /* Front Left Center */
58 FRC = (1 << 4), /* Front Right Center */
59 RL = (1 << 5), /* Rear Left */
60 RC = (1 << 6), /* Rear Center */
61 RR = (1 << 7), /* Rear Right */
62 RLC = (1 << 8), /* Rear Left Center */
63 RRC = (1 << 9), /* Rear Right Center */
64 LFE = (1 << 10), /* Low Frequency Effect */
65 };
66
67 struct cea_channel_speaker_allocation {
68 int ca_index;
69 int speakers[8];
70
71 /* derived values, just for convenience */
72 int channels;
73 int spk_mask;
74 };
75
76 struct channel_map_table {
77 unsigned char map; /* ALSA API channel map position */
78 unsigned char cea_slot; /* CEA slot value */
79 int spk_mask; /* speaker position bit mask */
80 };
81
82 struct pcm_stream_info {
83 struct snd_pcm_substream *substream;
84 int substream_refcount;
85 };
86
87 /*
88 * struct snd_intelhad - intelhad driver structure
89 *
90 * @card: ptr to hold card details
91 * @connected: the monitor connection status
92 * @stream_info: stream information
93 * @eld: holds ELD info
94 * @curr_buf: pointer to hold current active ring buf
95 * @valid_buf_cnt: ring buffer count for stream
96 * @had_spinlock: driver lock
97 * @aes_bits: IEC958 status bits
98 * @buff_done: id of current buffer done intr
99 * @dev: platoform device handle
100 * @chmap: holds channel map info
101 */
102 struct snd_intelhad {
103 struct snd_intelhad_card *card_ctx;
104 bool connected;
105 struct pcm_stream_info stream_info;
106 unsigned char eld[HDMI_MAX_ELD_BYTES];
107 bool dp_output;
108 unsigned int aes_bits;
109 spinlock_t had_spinlock;
110 struct device *dev;
111 struct snd_pcm_chmap *chmap;
112 int tmds_clock_speed;
113 int link_rate;
114 int port; /* fixed */
115 int pipe; /* can change dynamically */
116
117 /* ring buffer (BD) position index */
118 unsigned int bd_head;
119 /* PCM buffer position indices */
120 unsigned int pcmbuf_head; /* being processed */
121 unsigned int pcmbuf_filled; /* to be filled */
122
123 unsigned int num_bds; /* number of BDs */
124 unsigned int period_bytes; /* PCM period size in bytes */
125
126 /* internal stuff */
127 union aud_cfg aud_config; /* AUD_CONFIG reg value cache */
128 struct work_struct hdmi_audio_wq;
129 struct mutex mutex; /* for protecting chmap and eld */
130 bool need_reset;
131 struct snd_jack *jack;
132 };
133
134 struct snd_intelhad_card {
135 struct snd_card *card;
136 struct device *dev;
137
138 /* internal stuff */
139 int irq;
140 void __iomem *mmio_start;
141 int num_pipes;
142 int num_ports;
143 struct snd_intelhad pcm_ctx[3]; /* one for each port */
144 };
145
146 #endif /* _INTEL_HDMI_AUDIO_ */