1/*
2 *  Interface for hwdep device
3 *
4 *  Copyright (C) 2004 Takashi Iwai <tiwai@suse.de>
5 *
6 *   This program is free software; you can redistribute it and/or modify
7 *   it under the terms of the GNU General Public License as published by
8 *   the Free Software Foundation; either version 2 of the License, or
9 *   (at your option) any later version.
10 *
11 *   This program is distributed in the hope that it will be useful,
12 *   but WITHOUT ANY WARRANTY; without even the implied warranty of
13 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
14 *   GNU General Public License for more details.
15 *
16 *   You should have received a copy of the GNU General Public License
17 *   along with this program; if not, write to the Free Software
18 *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
19 *
20 */
21
22#include <sound/core.h>
23#include <sound/hwdep.h>
24#include <linux/uaccess.h>
25#include "emux_voice.h"
26
27
28#define TMP_CLIENT_ID	0x1001
29
30/*
31 * load patch
32 */
33static int
34snd_emux_hwdep_load_patch(struct snd_emux *emu, void __user *arg)
35{
36	int err;
37	struct soundfont_patch_info patch;
38
39	if (copy_from_user(&patch, arg, sizeof(patch)))
40		return -EFAULT;
41
42	if (patch.type >= SNDRV_SFNT_LOAD_INFO &&
43	    patch.type <= SNDRV_SFNT_PROBE_DATA) {
44		err = snd_soundfont_load(emu->sflist, arg, patch.len + sizeof(patch), TMP_CLIENT_ID);
45		if (err < 0)
46			return err;
47	} else {
48		if (emu->ops.load_fx)
49			return emu->ops.load_fx(emu, patch.type, patch.optarg, arg, patch.len + sizeof(patch));
50		else
51			return -EINVAL;
52	}
53	return 0;
54}
55
56/*
57 * set misc mode
58 */
59static int
60snd_emux_hwdep_misc_mode(struct snd_emux *emu, void __user *arg)
61{
62	struct snd_emux_misc_mode info;
63	int i;
64
65	if (copy_from_user(&info, arg, sizeof(info)))
66		return -EFAULT;
67	if (info.mode < 0 || info.mode >= EMUX_MD_END)
68		return -EINVAL;
69
70	if (info.port < 0) {
71		for (i = 0; i < emu->num_ports; i++)
72			emu->portptrs[i]->ctrls[info.mode] = info.value;
73	} else {
74		if (info.port < emu->num_ports)
75			emu->portptrs[info.port]->ctrls[info.mode] = info.value;
76	}
77	return 0;
78}
79
80
81/*
82 * ioctl
83 */
84static int
85snd_emux_hwdep_ioctl(struct snd_hwdep * hw, struct file *file,
86		     unsigned int cmd, unsigned long arg)
87{
88	struct snd_emux *emu = hw->private_data;
89
90	switch (cmd) {
91	case SNDRV_EMUX_IOCTL_VERSION:
92		return put_user(SNDRV_EMUX_VERSION, (unsigned int __user *)arg);
93	case SNDRV_EMUX_IOCTL_LOAD_PATCH:
94		return snd_emux_hwdep_load_patch(emu, (void __user *)arg);
95	case SNDRV_EMUX_IOCTL_RESET_SAMPLES:
96		snd_soundfont_remove_samples(emu->sflist);
97		break;
98	case SNDRV_EMUX_IOCTL_REMOVE_LAST_SAMPLES:
99		snd_soundfont_remove_unlocked(emu->sflist);
100		break;
101	case SNDRV_EMUX_IOCTL_MEM_AVAIL:
102		if (emu->memhdr) {
103			int size = snd_util_mem_avail(emu->memhdr);
104			return put_user(size, (unsigned int __user *)arg);
105		}
106		break;
107	case SNDRV_EMUX_IOCTL_MISC_MODE:
108		return snd_emux_hwdep_misc_mode(emu, (void __user *)arg);
109	}
110
111	return 0;
112}
113
114
115/*
116 * register hwdep device
117 */
118
119int
120snd_emux_init_hwdep(struct snd_emux *emu)
121{
122	struct snd_hwdep *hw;
123	int err;
124
125	if ((err = snd_hwdep_new(emu->card, SNDRV_EMUX_HWDEP_NAME, emu->hwdep_idx, &hw)) < 0)
126		return err;
127	emu->hwdep = hw;
128	strcpy(hw->name, SNDRV_EMUX_HWDEP_NAME);
129	hw->iface = SNDRV_HWDEP_IFACE_EMUX_WAVETABLE;
130	hw->ops.ioctl = snd_emux_hwdep_ioctl;
131	/* The ioctl parameter types are compatible between 32- and
132	 * 64-bit architectures, so use the same function. */
133	hw->ops.ioctl_compat = snd_emux_hwdep_ioctl;
134	hw->exclusive = 1;
135	hw->private_data = emu;
136	if ((err = snd_card_register(emu->card)) < 0)
137		return err;
138
139	return 0;
140}
141
142
143/*
144 * unregister
145 */
146void
147snd_emux_delete_hwdep(struct snd_emux *emu)
148{
149	if (emu->hwdep) {
150		snd_device_free(emu->card, emu->hwdep);
151		emu->hwdep = NULL;
152	}
153}
154