xref: /openbmc/linux/sound/isa/sb/emu8000_synth.c (revision e8f6f3b4)
1 /*
2  *  Copyright (c) by Jaroslav Kysela <perex@perex.cz>
3  *     and (c) 1999 Steve Ratcliffe <steve@parabola.demon.co.uk>
4  *  Copyright (C) 1999-2000 Takashi Iwai <tiwai@suse.de>
5  *
6  *  Emu8000 synth plug-in routine
7  *
8  *   This program is free software; you can redistribute it and/or modify
9  *   it under the terms of the GNU General Public License as published by
10  *   the Free Software Foundation; either version 2 of the License, or
11  *   (at your option) any later version.
12  *
13  *   This program is distributed in the hope that it will be useful,
14  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
15  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
16  *   GNU General Public License for more details.
17  *
18  *   You should have received a copy of the GNU General Public License
19  *   along with this program; if not, write to the Free Software
20  *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
21  */
22 
23 #include "emu8000_local.h"
24 #include <linux/init.h>
25 #include <linux/module.h>
26 #include <sound/initval.h>
27 
28 MODULE_AUTHOR("Takashi Iwai, Steve Ratcliffe");
29 MODULE_DESCRIPTION("Emu8000 synth plug-in routine");
30 MODULE_LICENSE("GPL");
31 
32 /*----------------------------------------------------------------*/
33 
34 /*
35  * create a new hardware dependent device for Emu8000
36  */
37 static int snd_emu8000_new_device(struct snd_seq_device *dev)
38 {
39 	struct snd_emu8000 *hw;
40 	struct snd_emux *emu;
41 
42 	hw = *(struct snd_emu8000**)SNDRV_SEQ_DEVICE_ARGPTR(dev);
43 	if (hw == NULL)
44 		return -EINVAL;
45 
46 	if (hw->emu)
47 		return -EBUSY; /* already exists..? */
48 
49 	if (snd_emux_new(&emu) < 0)
50 		return -ENOMEM;
51 
52 	hw->emu = emu;
53 	snd_emu8000_ops_setup(hw);
54 
55 	emu->hw = hw;
56 	emu->max_voices = EMU8000_DRAM_VOICES;
57 	emu->num_ports = hw->seq_ports;
58 
59 	if (hw->memhdr) {
60 		snd_printk(KERN_ERR "memhdr is already initialized!?\n");
61 		snd_util_memhdr_free(hw->memhdr);
62 	}
63 	hw->memhdr = snd_util_memhdr_new(hw->mem_size);
64 	if (hw->memhdr == NULL) {
65 		snd_emux_free(emu);
66 		hw->emu = NULL;
67 		return -ENOMEM;
68 	}
69 
70 	emu->memhdr = hw->memhdr;
71 	emu->midi_ports = hw->seq_ports < 2 ? hw->seq_ports : 2; /* number of virmidi ports */
72 	emu->midi_devidx = 1;
73 	emu->linear_panning = 1;
74 	emu->hwdep_idx = 2; /* FIXED */
75 
76 	if (snd_emux_register(emu, dev->card, hw->index, "Emu8000") < 0) {
77 		snd_emux_free(emu);
78 		snd_util_memhdr_free(hw->memhdr);
79 		hw->emu = NULL;
80 		hw->memhdr = NULL;
81 		return -ENOMEM;
82 	}
83 
84 	if (hw->mem_size > 0)
85 		snd_emu8000_pcm_new(dev->card, hw, 1);
86 
87 	dev->driver_data = hw;
88 
89 	return 0;
90 }
91 
92 
93 /*
94  * free all resources
95  */
96 static int snd_emu8000_delete_device(struct snd_seq_device *dev)
97 {
98 	struct snd_emu8000 *hw;
99 
100 	if (dev->driver_data == NULL)
101 		return 0; /* no synth was allocated actually */
102 
103 	hw = dev->driver_data;
104 	if (hw->pcm)
105 		snd_device_free(dev->card, hw->pcm);
106 	if (hw->emu)
107 		snd_emux_free(hw->emu);
108 	snd_util_memhdr_free(hw->memhdr);
109 	hw->emu = NULL;
110 	hw->memhdr = NULL;
111 	return 0;
112 }
113 
114 /*
115  *  INIT part
116  */
117 
118 static int __init alsa_emu8000_init(void)
119 {
120 
121 	static struct snd_seq_dev_ops ops = {
122 		snd_emu8000_new_device,
123 		snd_emu8000_delete_device,
124 	};
125 	return snd_seq_device_register_driver(SNDRV_SEQ_DEV_ID_EMU8000, &ops,
126 					      sizeof(struct snd_emu8000*));
127 }
128 
129 static void __exit alsa_emu8000_exit(void)
130 {
131 	snd_seq_device_unregister_driver(SNDRV_SEQ_DEV_ID_EMU8000);
132 }
133 
134 module_init(alsa_emu8000_init)
135 module_exit(alsa_emu8000_exit)
136