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https://github.com/torvalds/linux
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67192cc0f0
The mixer, PCM prepare, MIDI, synth driver, and procfs callbacks are all always invoked with IRQs enabled, so there is no point in saving the state. snd_emu1010_load_firmware_entry() is called from emu1010_firmware_work() and snd_emu10k1_emu1010_init(); the latter from snd_emu10k1_create() and snd_emu10k1_resume(), all of which have IRQs enabled. The voice and memory functions are called from mixed contexts, so they keep the state saving. The low-level functions all keep the state saving, because it's not feasible to keep track of what is called where. Signed-off-by: Oswald Buddenhagen <oswald.buddenhagen@gmx.de> Link: https://lore.kernel.org/r/20230712145750.125086-2-oswald.buddenhagen@gmx.de Signed-off-by: Takashi Iwai <tiwai@suse.de>
104 lines
2.3 KiB
C
104 lines
2.3 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Copyright (C) 2000 Takashi Iwai <tiwai@suse.de>
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*
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* Routines for control of EMU10K1 WaveTable synth
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*/
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#include "emu10k1_synth_local.h"
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#include <linux/init.h>
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#include <linux/module.h>
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MODULE_AUTHOR("Takashi Iwai");
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MODULE_DESCRIPTION("Routines for control of EMU10K1 WaveTable synth");
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MODULE_LICENSE("GPL");
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/*
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* create a new hardware dependent device for Emu10k1
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*/
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static int snd_emu10k1_synth_probe(struct device *_dev)
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{
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struct snd_seq_device *dev = to_seq_dev(_dev);
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struct snd_emux *emux;
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struct snd_emu10k1 *hw;
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struct snd_emu10k1_synth_arg *arg;
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arg = SNDRV_SEQ_DEVICE_ARGPTR(dev);
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if (arg == NULL)
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return -EINVAL;
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if (arg->seq_ports <= 0)
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return 0; /* nothing */
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if (arg->max_voices < 1)
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arg->max_voices = 1;
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else if (arg->max_voices > 64)
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arg->max_voices = 64;
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if (snd_emux_new(&emux) < 0)
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return -ENOMEM;
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snd_emu10k1_ops_setup(emux);
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hw = arg->hwptr;
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emux->hw = hw;
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emux->max_voices = arg->max_voices;
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emux->num_ports = arg->seq_ports;
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emux->memhdr = hw->memhdr;
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/* maximum two ports */
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emux->midi_ports = arg->seq_ports < 2 ? arg->seq_ports : 2;
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/* audigy has two external midis */
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emux->midi_devidx = hw->audigy ? 2 : 1;
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emux->linear_panning = 0;
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emux->hwdep_idx = 2; /* FIXED */
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if (snd_emux_register(emux, dev->card, arg->index, "Emu10k1") < 0) {
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snd_emux_free(emux);
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return -ENOMEM;
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}
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spin_lock_irq(&hw->voice_lock);
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hw->synth = emux;
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hw->get_synth_voice = snd_emu10k1_synth_get_voice;
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spin_unlock_irq(&hw->voice_lock);
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dev->driver_data = emux;
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return 0;
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}
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static int snd_emu10k1_synth_remove(struct device *_dev)
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{
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struct snd_seq_device *dev = to_seq_dev(_dev);
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struct snd_emux *emux;
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struct snd_emu10k1 *hw;
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if (dev->driver_data == NULL)
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return 0; /* not registered actually */
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emux = dev->driver_data;
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hw = emux->hw;
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spin_lock_irq(&hw->voice_lock);
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hw->synth = NULL;
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hw->get_synth_voice = NULL;
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spin_unlock_irq(&hw->voice_lock);
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snd_emux_free(emux);
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return 0;
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}
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/*
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* INIT part
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*/
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static struct snd_seq_driver emu10k1_synth_driver = {
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.driver = {
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.name = KBUILD_MODNAME,
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.probe = snd_emu10k1_synth_probe,
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.remove = snd_emu10k1_synth_remove,
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},
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.id = SNDRV_SEQ_DEV_ID_EMU10K1_SYNTH,
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.argsize = sizeof(struct snd_emu10k1_synth_arg),
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};
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module_snd_seq_driver(emu10k1_synth_driver);
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