// SPDX-License-Identifier: GPL-2.0-or-later /* * Dummy soundcard * Copyright (c) by Jaroslav Kysela <[email protected]> */ #include <linux/init.h> #include <linux/err.h> #include <linux/platform_device.h> #include <linux/jiffies.h> #include <linux/slab.h> #include <linux/time.h> #include <linux/wait.h> #include <linux/hrtimer.h> #include <linux/math64.h> #include <linux/module.h> #include <sound/core.h> #include <sound/control.h> #include <sound/tlv.h> #include <sound/pcm.h> #include <sound/rawmidi.h> #include <sound/info.h> #include <sound/initval.h> MODULE_AUTHOR(…) …; MODULE_DESCRIPTION(…) …; MODULE_LICENSE(…) …; #define MAX_PCM_DEVICES … #define MAX_PCM_SUBSTREAMS … #define MAX_MIDI_DEVICES … /* defaults */ #define MAX_BUFFER_SIZE … #define MIN_PERIOD_SIZE … #define MAX_PERIOD_SIZE … #define USE_FORMATS … #define USE_RATE … #define USE_RATE_MIN … #define USE_RATE_MAX … #define USE_CHANNELS_MIN … #define USE_CHANNELS_MAX … #define USE_PERIODS_MIN … #define USE_PERIODS_MAX … #define USE_MIXER_VOLUME_LEVEL_MIN … #define USE_MIXER_VOLUME_LEVEL_MAX … static int index[SNDRV_CARDS] = …; /* Index 0-MAX */ static char *id[SNDRV_CARDS] = …; /* ID for this card */ static bool enable[SNDRV_CARDS] = …; static char *model[SNDRV_CARDS] = …; static int pcm_devs[SNDRV_CARDS] = …; static int pcm_substreams[SNDRV_CARDS] = …; //static int midi_devs[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS - 1)] = 2}; static int mixer_volume_level_min = …; static int mixer_volume_level_max = …; #ifdef CONFIG_HIGH_RES_TIMERS static bool hrtimer = …; #endif static bool fake_buffer = …; module_param_array(…); MODULE_PARM_DESC(…) …; module_param_array(…); MODULE_PARM_DESC(…) …; module_param_array(…); MODULE_PARM_DESC(…) …; module_param_array(…); MODULE_PARM_DESC(…) …; module_param_array(…); MODULE_PARM_DESC(…) …; module_param_array(…); MODULE_PARM_DESC(…) …; //module_param_array(midi_devs, int, NULL, 0444); //MODULE_PARM_DESC(midi_devs, "MIDI devices # (0-2) for dummy driver."); module_param(mixer_volume_level_min, int, 0444); MODULE_PARM_DESC(…) …; module_param(mixer_volume_level_max, int, 0444); MODULE_PARM_DESC(…) …; module_param(fake_buffer, bool, 0444); MODULE_PARM_DESC(…) …; #ifdef CONFIG_HIGH_RES_TIMERS module_param(hrtimer, bool, 0644); MODULE_PARM_DESC(…) …; #endif static struct platform_device *devices[SNDRV_CARDS]; #define MIXER_ADDR_MASTER … #define MIXER_ADDR_LINE … #define MIXER_ADDR_MIC … #define MIXER_ADDR_SYNTH … #define MIXER_ADDR_CD … #define MIXER_ADDR_LAST … struct dummy_timer_ops { … }; #define get_dummy_ops(substream) … struct dummy_model { … }; struct snd_dummy { … }; /* * card models */ static int emu10k1_playback_constraints(struct snd_pcm_runtime *runtime) { … } static const struct dummy_model model_emu10k1 = …; static const struct dummy_model model_rme9652 = …; static const struct dummy_model model_ice1712 = …; static const struct dummy_model model_uda1341 = …; static const struct dummy_model model_ac97 = …; static const struct dummy_model model_ca0106 = …; static const struct dummy_model *dummy_models[] = …; /* * system timer interface */ struct dummy_systimer_pcm { … }; static void dummy_systimer_rearm(struct dummy_systimer_pcm *dpcm) { … } static void dummy_systimer_update(struct dummy_systimer_pcm *dpcm) { … } static int dummy_systimer_start(struct snd_pcm_substream *substream) { … } static int dummy_systimer_stop(struct snd_pcm_substream *substream) { … } static int dummy_systimer_prepare(struct snd_pcm_substream *substream) { … } static void dummy_systimer_callback(struct timer_list *t) { … } static snd_pcm_uframes_t dummy_systimer_pointer(struct snd_pcm_substream *substream) { … } static int dummy_systimer_create(struct snd_pcm_substream *substream) { … } static void dummy_systimer_free(struct snd_pcm_substream *substream) { … } static const struct dummy_timer_ops dummy_systimer_ops = …; #ifdef CONFIG_HIGH_RES_TIMERS /* * hrtimer interface */ struct dummy_hrtimer_pcm { … }; static enum hrtimer_restart dummy_hrtimer_callback(struct hrtimer *timer) { … } static int dummy_hrtimer_start(struct snd_pcm_substream *substream) { … } static int dummy_hrtimer_stop(struct snd_pcm_substream *substream) { … } static inline void dummy_hrtimer_sync(struct dummy_hrtimer_pcm *dpcm) { … } static snd_pcm_uframes_t dummy_hrtimer_pointer(struct snd_pcm_substream *substream) { … } static int dummy_hrtimer_prepare(struct snd_pcm_substream *substream) { … } static int dummy_hrtimer_create(struct snd_pcm_substream *substream) { … } static void dummy_hrtimer_free(struct snd_pcm_substream *substream) { … } static const struct dummy_timer_ops dummy_hrtimer_ops = …; #endif /* CONFIG_HIGH_RES_TIMERS */ /* * PCM interface */ static int dummy_pcm_trigger(struct snd_pcm_substream *substream, int cmd) { … } static int dummy_pcm_prepare(struct snd_pcm_substream *substream) { … } static snd_pcm_uframes_t dummy_pcm_pointer(struct snd_pcm_substream *substream) { … } static const struct snd_pcm_hardware dummy_pcm_hardware = …; static int dummy_pcm_hw_params(struct snd_pcm_substream *substream, struct snd_pcm_hw_params *hw_params) { … } static int dummy_pcm_open(struct snd_pcm_substream *substream) { … } static int dummy_pcm_close(struct snd_pcm_substream *substream) { … } /* * dummy buffer handling */ static void *dummy_page[2]; static void free_fake_buffer(void) { … } static int alloc_fake_buffer(void) { … } static int dummy_pcm_copy(struct snd_pcm_substream *substream, int channel, unsigned long pos, struct iov_iter *iter, unsigned long bytes) { … } static int dummy_pcm_silence(struct snd_pcm_substream *substream, int channel, unsigned long pos, unsigned long bytes) { … } static struct page *dummy_pcm_page(struct snd_pcm_substream *substream, unsigned long offset) { … } static const struct snd_pcm_ops dummy_pcm_ops = …; static const struct snd_pcm_ops dummy_pcm_ops_no_buf = …; static int snd_card_dummy_pcm(struct snd_dummy *dummy, int device, int substreams) { … } /* * mixer interface */ #define DUMMY_VOLUME(xname, xindex, addr) … static int snd_dummy_volume_info(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo) { … } static int snd_dummy_volume_get(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol) { … } static int snd_dummy_volume_put(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol) { … } static const DECLARE_TLV_DB_SCALE(db_scale_dummy, -4500, 30, 0); #define DUMMY_CAPSRC(xname, xindex, addr) … #define snd_dummy_capsrc_info … static int snd_dummy_capsrc_get(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol) { … } static int snd_dummy_capsrc_put(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol) { … } static int snd_dummy_iobox_info(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *info) { … } static int snd_dummy_iobox_get(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *value) { … } static int snd_dummy_iobox_put(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *value) { … } static const struct snd_kcontrol_new snd_dummy_controls[] = …; static int snd_card_dummy_new_mixer(struct snd_dummy *dummy) { … } #if defined(CONFIG_SND_DEBUG) && defined(CONFIG_SND_PROC_FS) /* * proc interface */ static void print_formats(struct snd_dummy *dummy, struct snd_info_buffer *buffer) { … } static void print_rates(struct snd_dummy *dummy, struct snd_info_buffer *buffer) { … } #define get_dummy_int_ptr(dummy, ofs) … #define get_dummy_ll_ptr(dummy, ofs) … struct dummy_hw_field { … }; #define FIELD_ENTRY(item, fmt) … static const struct dummy_hw_field fields[] = …; static void dummy_proc_read(struct snd_info_entry *entry, struct snd_info_buffer *buffer) { … } static void dummy_proc_write(struct snd_info_entry *entry, struct snd_info_buffer *buffer) { … } static void dummy_proc_init(struct snd_dummy *chip) { … } #else #define dummy_proc_init … #endif /* CONFIG_SND_DEBUG && CONFIG_SND_PROC_FS */ static int snd_dummy_probe(struct platform_device *devptr) { … } static int snd_dummy_suspend(struct device *pdev) { … } static int snd_dummy_resume(struct device *pdev) { … } static DEFINE_SIMPLE_DEV_PM_OPS(snd_dummy_pm, snd_dummy_suspend, snd_dummy_resume); #define SND_DUMMY_DRIVER … static struct platform_driver snd_dummy_driver = …; static void snd_dummy_unregister_all(void) { … } static int __init alsa_card_dummy_init(void) { … } static void __exit alsa_card_dummy_exit(void) { … } module_init(…) … module_exit(…)
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