Book a Demo!
CoCalc Logo Icon
StoreFeaturesDocsShareSupportNewsAboutPoliciesSign UpSign In
torvalds
GitHub Repository: torvalds/linux
 Path: blob/master/sound/pci/emu10k1/emu10k1_synth.c
29266 views
1
// SPDX-License-Identifier: GPL-2.0-or-later

2
/*

3
 *  Copyright (C) 2000 Takashi Iwai <[email protected]>

4
 *

5
 *  Routines for control of EMU10K1 WaveTable synth

6
 */

7


8
#include "emu10k1_synth_local.h"

9
#include <linux/init.h>

10
#include <linux/module.h>

11


12
MODULE_AUTHOR("Takashi Iwai");

13
MODULE_DESCRIPTION("Routines for control of EMU10K1 WaveTable synth");

14
MODULE_LICENSE("GPL");

15


16
/*

17
 * create a new hardware dependent device for Emu10k1

18
 */

19
static int snd_emu10k1_synth_probe(struct device *_dev)

20
{

21
	struct snd_seq_device *dev = to_seq_dev(_dev);

22
	struct snd_emux *emux;

23
	struct snd_emu10k1 *hw;

24
	struct snd_emu10k1_synth_arg *arg;

25


26
	arg = SNDRV_SEQ_DEVICE_ARGPTR(dev);

27
	if (arg == NULL)

28
		return -EINVAL;

29


30
	if (arg->seq_ports <= 0)

31
		return 0; /* nothing */

32
	if (arg->max_voices < 1)

33
		arg->max_voices = 1;

34
	else if (arg->max_voices > 64)

35
		arg->max_voices = 64;

36


37
	if (snd_emux_new(&emux) < 0)

38
		return -ENOMEM;

39


40
	snd_emu10k1_ops_setup(emux);

41
	hw = arg->hwptr;

42
	emux->hw = hw;

43
	emux->max_voices = arg->max_voices;

44
	emux->num_ports = arg->seq_ports;

45
	emux->memhdr = hw->memhdr;

46
	/* maximum two ports */

47
	emux->midi_ports = arg->seq_ports < 2 ? arg->seq_ports : 2;

48
	/* audigy has two external midis */

49
	emux->midi_devidx = hw->audigy ? 2 : 1;

50
	emux->linear_panning = 0;

51
	emux->hwdep_idx = 2; /* FIXED */

52


53
	if (snd_emux_register(emux, dev->card, arg->index, "Emu10k1") < 0) {

54
		snd_emux_free(emux);

55
		return -ENOMEM;

56
	}

57


58
	guard(spinlock_irq)(&hw->voice_lock);

59
	hw->synth = emux;

60
	hw->get_synth_voice = snd_emu10k1_synth_get_voice;

61


62
	dev->driver_data = emux;

63


64
	return 0;

65
}

66


67
static int snd_emu10k1_synth_remove(struct device *_dev)

68
{

69
	struct snd_seq_device *dev = to_seq_dev(_dev);

70
	struct snd_emux *emux;

71
	struct snd_emu10k1 *hw;

72


73
	if (dev->driver_data == NULL)

74
		return 0; /* not registered actually */

75


76
	emux = dev->driver_data;

77


78
	hw = emux->hw;

79
	scoped_guard(spinlock_irq, &hw->voice_lock) {

80
		hw->synth = NULL;

81
		hw->get_synth_voice = NULL;

82
	}

83


84
	snd_emux_free(emux);

85
	return 0;

86
}

87


88
/*

89
 *  INIT part

90
 */

91


92
static struct snd_seq_driver emu10k1_synth_driver = {

93
	.driver = {

94
		.name = KBUILD_MODNAME,

95
		.probe = snd_emu10k1_synth_probe,

96
		.remove = snd_emu10k1_synth_remove,

97
	},

98
	.id = SNDRV_SEQ_DEV_ID_EMU10K1_SYNTH,

99
	.argsize = sizeof(struct snd_emu10k1_synth_arg),

100
};

101


102
module_snd_seq_driver(emu10k1_synth_driver);

103


104