1 /* SPDX-License-Identifier: GPL-2.0 */ 2 /* Copyright 2011 Broadcom Corporation. All rights reserved. */ 3 4 #ifndef __SOUND_ARM_BCM2835_H 5 #define __SOUND_ARM_BCM2835_H 6 7 #include <linux/device.h> 8 #include <linux/list.h> 9 #include <linux/interrupt.h> 10 #include <linux/wait.h> 11 #include <sound/core.h> 12 #include <sound/initval.h> 13 #include <sound/pcm.h> 14 #include <sound/pcm_params.h> 15 #include <sound/pcm-indirect.h> 16 #include <linux/workqueue.h> 17 18 #include "interface/vchi/vchi.h" 19 20 /* 21 * #define AUDIO_DEBUG_ENABLE 22 * #define AUDIO_VERBOSE_DEBUG_ENABLE 23 */ 24 25 /* Debug macros */ 26 27 #ifdef AUDIO_DEBUG_ENABLE 28 #ifdef AUDIO_VERBOSE_DEBUG_ENABLE 29 30 #define audio_debug(fmt, arg...) \ 31 pr_info("%s:%d " fmt, __func__, __LINE__, ##arg) 32 33 #define audio_info(fmt, arg...) \ 34 pr_info("%s:%d " fmt, __func__, __LINE__, ##arg) 35 36 #else 37 38 #define audio_debug(fmt, arg...) 39 40 #define audio_info(fmt, arg...) 41 42 #endif /* AUDIO_VERBOSE_DEBUG_ENABLE */ 43 44 #else 45 46 #define audio_debug(fmt, arg...) 47 48 #define audio_info(fmt, arg...) 49 50 #endif /* AUDIO_DEBUG_ENABLE */ 51 52 #define audio_error(fmt, arg...) \ 53 pr_err("%s:%d " fmt, __func__, __LINE__, ##arg) 54 55 #define audio_warning(fmt, arg...) \ 56 pr_warn("%s:%d " fmt, __func__, __LINE__, ##arg) 57 58 #define audio_alert(fmt, arg...) \ 59 pr_alert("%s:%d " fmt, __func__, __LINE__, ##arg) 60 61 #define MAX_SUBSTREAMS (8) 62 #define AVAIL_SUBSTREAMS_MASK (0xff) 63 64 enum { 65 CTRL_VOL_MUTE, 66 CTRL_VOL_UNMUTE 67 }; 68 69 /* macros for alsa2chip and chip2alsa, instead of functions */ 70 71 // convert alsa to chip volume (defined as macro rather than function call) 72 #define alsa2chip(vol) (uint)(-(((vol) << 8) / 100)) 73 74 // convert chip to alsa volume 75 #define chip2alsa(vol) -(((vol) * 100) >> 8) 76 77 /* Some constants for values .. */ 78 enum snd_bcm2835_route { 79 AUDIO_DEST_AUTO = 0, 80 AUDIO_DEST_HEADPHONES = 1, 81 AUDIO_DEST_HDMI = 2, 82 AUDIO_DEST_MAX, 83 }; 84 85 enum snd_bcm2835_ctrl { 86 PCM_PLAYBACK_VOLUME, 87 PCM_PLAYBACK_MUTE, 88 PCM_PLAYBACK_DEVICE, 89 }; 90 91 struct bcm2835_vchi_ctx { 92 VCHI_INSTANCE_T vchi_instance; 93 VCHI_CONNECTION_T *vchi_connection; 94 }; 95 96 /* definition of the chip-specific record */ 97 struct bcm2835_chip { 98 struct snd_card *card; 99 struct snd_pcm *pcm; 100 struct snd_pcm *pcm_spdif; 101 /* Bitmat for valid reg_base and irq numbers */ 102 unsigned int avail_substreams; 103 struct device *dev; 104 struct bcm2835_alsa_stream *alsa_stream[MAX_SUBSTREAMS]; 105 106 int volume; 107 int old_volume; /* stores the volume value whist muted */ 108 int dest; 109 int mute; 110 111 unsigned int opened; 112 unsigned int spdif_status; 113 struct mutex audio_mutex; 114 115 struct bcm2835_vchi_ctx *vchi_ctx; 116 }; 117 118 struct bcm2835_alsa_stream { 119 struct bcm2835_chip *chip; 120 struct snd_pcm_substream *substream; 121 struct snd_pcm_indirect pcm_indirect; 122 123 spinlock_t lock; 124 125 int open; 126 int running; 127 int draining; 128 129 int channels; 130 int params_rate; 131 int pcm_format_width; 132 133 unsigned int pos; 134 unsigned int buffer_size; 135 unsigned int period_size; 136 137 atomic_t retrieved; 138 struct bcm2835_audio_instance *instance; 139 struct workqueue_struct *my_wq; 140 int idx; 141 }; 142 143 int snd_bcm2835_new_ctl(struct bcm2835_chip *chip); 144 int snd_bcm2835_new_pcm(struct bcm2835_chip *chip, u32 numchannels); 145 int snd_bcm2835_new_spdif_pcm(struct bcm2835_chip *chip); 146 int snd_bcm2835_new_simple_pcm(struct bcm2835_chip *chip, 147 const char *name, 148 enum snd_bcm2835_route route, 149 u32 numchannels); 150 151 int snd_bcm2835_new_hdmi_ctl(struct bcm2835_chip *chip); 152 int snd_bcm2835_new_headphones_ctl(struct bcm2835_chip *chip); 153 154 int bcm2835_new_vchi_ctx(struct bcm2835_vchi_ctx *vchi_ctx); 155 void bcm2835_free_vchi_ctx(struct bcm2835_vchi_ctx *vchi_ctx); 156 157 int bcm2835_audio_open(struct bcm2835_alsa_stream *alsa_stream); 158 int bcm2835_audio_close(struct bcm2835_alsa_stream *alsa_stream); 159 int bcm2835_audio_set_params(struct bcm2835_alsa_stream *alsa_stream, 160 unsigned int channels, unsigned int samplerate, 161 unsigned int bps); 162 int bcm2835_audio_setup(struct bcm2835_alsa_stream *alsa_stream); 163 int bcm2835_audio_start(struct bcm2835_alsa_stream *alsa_stream); 164 int bcm2835_audio_stop(struct bcm2835_alsa_stream *alsa_stream); 165 int bcm2835_audio_set_ctls(struct bcm2835_chip *chip); 166 int bcm2835_audio_write(struct bcm2835_alsa_stream *alsa_stream, 167 unsigned int count, 168 void *src); 169 void bcm2835_playback_fifo(struct bcm2835_alsa_stream *alsa_stream); 170 unsigned int bcm2835_audio_retrieve_buffers(struct bcm2835_alsa_stream *alsa_stream); 171 void bcm2835_audio_flush_buffers(struct bcm2835_alsa_stream *alsa_stream); 172 void bcm2835_audio_flush_playback_buffers(struct bcm2835_alsa_stream *alsa_stream); 173 174 #endif /* __SOUND_ARM_BCM2835_H */ 175
