[thirdparty/linux.git] / sound / synth / emux / emux_hwdep.c

// SPDX-License-Identifier: GPL-2.0-or-later
/*
 *  Interface for hwdep device
 *
 *  Copyright (C) 2004 Takashi Iwai <tiwai@suse.de>
 */

#include <sound/core.h>
#include <sound/hwdep.h>
#include <linux/uaccess.h>
#include <linux/nospec.h>
#include "emux_voice.h"

#define TMP_CLIENT_ID	0x1001

/*
 * load patch
 */
static int
snd_emux_hwdep_load_patch(struct snd_emux *emu, void __user *arg)
{
	int err;
	struct soundfont_patch_info patch;

	if (copy_from_user(&patch, arg, sizeof(patch)))
		return -EFAULT;

	if (patch.key == GUS_PATCH)
		return snd_soundfont_load_guspatch(emu->sflist, arg,
						   patch.len + sizeof(patch),
						   TMP_CLIENT_ID);

	if (patch.type >= SNDRV_SFNT_LOAD_INFO &&
	    patch.type <= SNDRV_SFNT_PROBE_DATA) {
		err = snd_soundfont_load(emu->sflist, arg, patch.len + sizeof(patch), TMP_CLIENT_ID);
		if (err < 0)
			return err;
	} else {
		if (emu->ops.load_fx)
			return emu->ops.load_fx(emu, patch.type, patch.optarg, arg, patch.len + sizeof(patch));
		else
			return -EINVAL;
	}
	return 0;
}

/*
 * set misc mode
 */
static int
snd_emux_hwdep_misc_mode(struct snd_emux *emu, void __user *arg)
{
	struct snd_emux_misc_mode info;
	int i;

	if (copy_from_user(&info, arg, sizeof(info)))
		return -EFAULT;
	if (info.mode < 0 || info.mode >= EMUX_MD_END)
		return -EINVAL;
	info.mode = array_index_nospec(info.mode, EMUX_MD_END);

	if (info.port < 0) {
		for (i = 0; i < emu->num_ports; i++)
			emu->portptrs[i]->ctrls[info.mode] = info.value;
	} else {
		if (info.port < emu->num_ports) {
			info.port = array_index_nospec(info.port, emu->num_ports);
			emu->portptrs[info.port]->ctrls[info.mode] = info.value;
		}
	}
	return 0;
}


/*
 * ioctl
 */
static int
snd_emux_hwdep_ioctl(struct snd_hwdep * hw, struct file *file,
		     unsigned int cmd, unsigned long arg)
{
	struct snd_emux *emu = hw->private_data;

	switch (cmd) {
	case SNDRV_EMUX_IOCTL_VERSION:
		return put_user(SNDRV_EMUX_VERSION, (unsigned int __user *)arg);
	case SNDRV_EMUX_IOCTL_LOAD_PATCH:
		return snd_emux_hwdep_load_patch(emu, (void __user *)arg);
	case SNDRV_EMUX_IOCTL_RESET_SAMPLES:
		snd_soundfont_remove_samples(emu->sflist);
		break;
	case SNDRV_EMUX_IOCTL_REMOVE_LAST_SAMPLES:
		snd_soundfont_remove_unlocked(emu->sflist);
		break;
	case SNDRV_EMUX_IOCTL_MEM_AVAIL:
		if (emu->memhdr) {
			int size = snd_util_mem_avail(emu->memhdr);
			return put_user(size, (unsigned int __user *)arg);
		}
		break;
	case SNDRV_EMUX_IOCTL_MISC_MODE:
		return snd_emux_hwdep_misc_mode(emu, (void __user *)arg);
	}

	return 0;
}


/*
 * register hwdep device
 */

int
snd_emux_init_hwdep(struct snd_emux *emu)
{
	struct snd_hwdep *hw;
	int err;

	if ((err = snd_hwdep_new(emu->card, SNDRV_EMUX_HWDEP_NAME, emu->hwdep_idx, &hw)) < 0)
		return err;
	emu->hwdep = hw;
	strcpy(hw->name, SNDRV_EMUX_HWDEP_NAME);
	hw->iface = SNDRV_HWDEP_IFACE_EMUX_WAVETABLE;
	hw->ops.ioctl = snd_emux_hwdep_ioctl;
	/* The ioctl parameter types are compatible between 32- and
	 * 64-bit architectures, so use the same function. */
	hw->ops.ioctl_compat = snd_emux_hwdep_ioctl;
	hw->exclusive = 1;
	hw->private_data = emu;
	if ((err = snd_card_register(emu->card)) < 0)
		return err;

	return 0;
}


/*
 * unregister
 */
void
snd_emux_delete_hwdep(struct snd_emux *emu)
{
	if (emu->hwdep) {
		snd_device_free(emu->card, emu->hwdep);
		emu->hwdep = NULL;
	}
}
Commit	Line	Data
1a59d1b8	1	// SPDX-License-Identifier: GPL-2.0-or-later
1da177e4 LT	2	/*
	3	* Interface for hwdep device
	4	*
	5	* Copyright (C) 2004 Takashi Iwai <tiwai@suse.de>
1da177e4 LT	6	*/
1da177e4 LT	7
1da177e4 LT	8	#include <sound/core.h>
1da177e4 LT	9	#include <sound/hwdep.h>
976412fb	10	#include <linux/uaccess.h>
4aea96f4	11	#include <linux/nospec.h>
1da177e4 LT	12	#include "emux_voice.h"
1da177e4 LT	13
1da177e4 LT	14	#define TMP_CLIENT_ID 0x1001
	15
	16	/*
	17	* load patch
	18	*/
	19	static int
03da312a	20	snd_emux_hwdep_load_patch(struct snd_emux emu, void __user arg)
1da177e4 LT	21	{
1da177e4 LT	22	int err;
03da312a	23	struct soundfont_patch_info patch;
1da177e4 LT	24
	25	if (copy_from_user(&patch, arg, sizeof(patch)))
	26	return -EFAULT;
	27
e42dd3ee TI	28	if (patch.key == GUS_PATCH)
	29	return snd_soundfont_load_guspatch(emu->sflist, arg,
	30	patch.len + sizeof(patch),
	31	TMP_CLIENT_ID);
	32
1da177e4 LT	33	if (patch.type >= SNDRV_SFNT_LOAD_INFO &&
	34	patch.type <= SNDRV_SFNT_PROBE_DATA) {
	35	err = snd_soundfont_load(emu->sflist, arg, patch.len + sizeof(patch), TMP_CLIENT_ID);
	36	if (err < 0)
	37	return err;
	38	} else {
	39	if (emu->ops.load_fx)
	40	return emu->ops.load_fx(emu, patch.type, patch.optarg, arg, patch.len + sizeof(patch));
	41	else
	42	return -EINVAL;
	43	}
	44	return 0;
	45	}
	46
	47	/*
	48	* set misc mode
	49	*/
	50	static int
03da312a	51	snd_emux_hwdep_misc_mode(struct snd_emux emu, void __user arg)
1da177e4	52	{
03da312a	53	struct snd_emux_misc_mode info;
1da177e4 LT	54	int i;
	55
	56	if (copy_from_user(&info, arg, sizeof(info)))
	57	return -EFAULT;
	58	if (info.mode < 0 \|\| info.mode >= EMUX_MD_END)
	59	return -EINVAL;
4aea96f4	60	info.mode = array_index_nospec(info.mode, EMUX_MD_END);
1da177e4 LT	61
	62	if (info.port < 0) {
	63	for (i = 0; i < emu->num_ports; i++)
	64	emu->portptrs[i]->ctrls[info.mode] = info.value;
	65	} else {
4aea96f4 GS	66	if (info.port < emu->num_ports) {
4aea96f4 GS	67	info.port = array_index_nospec(info.port, emu->num_ports);
1da177e4	68	emu->portptrs[info.port]->ctrls[info.mode] = info.value;
4aea96f4	69	}
1da177e4 LT	70	}
	71	return 0;
	72	}
	73
	74
	75	/*
	76	* ioctl
	77	*/
	78	static int
03da312a TI	79	snd_emux_hwdep_ioctl(struct snd_hwdep * hw, struct file *file,
03da312a TI	80	unsigned int cmd, unsigned long arg)
1da177e4	81	{
03da312a	82	struct snd_emux *emu = hw->private_data;
1da177e4 LT	83
	84	switch (cmd) {
	85	case SNDRV_EMUX_IOCTL_VERSION:
	86	return put_user(SNDRV_EMUX_VERSION, (unsigned int __user *)arg);
	87	case SNDRV_EMUX_IOCTL_LOAD_PATCH:
	88	return snd_emux_hwdep_load_patch(emu, (void __user *)arg);
	89	case SNDRV_EMUX_IOCTL_RESET_SAMPLES:
	90	snd_soundfont_remove_samples(emu->sflist);
	91	break;
	92	case SNDRV_EMUX_IOCTL_REMOVE_LAST_SAMPLES:
	93	snd_soundfont_remove_unlocked(emu->sflist);
	94	break;
	95	case SNDRV_EMUX_IOCTL_MEM_AVAIL:
	96	if (emu->memhdr) {
	97	int size = snd_util_mem_avail(emu->memhdr);
	98	return put_user(size, (unsigned int __user *)arg);
	99	}
	100	break;
	101	case SNDRV_EMUX_IOCTL_MISC_MODE:
	102	return snd_emux_hwdep_misc_mode(emu, (void __user *)arg);
	103	}
	104
	105	return 0;
	106	}
	107
	108
	109	/*
	110	* register hwdep device
	111	*/
	112
	113	int
03da312a	114	snd_emux_init_hwdep(struct snd_emux *emu)
1da177e4	115	{
03da312a	116	struct snd_hwdep *hw;
1da177e4 LT	117	int err;
	118
	119	if ((err = snd_hwdep_new(emu->card, SNDRV_EMUX_HWDEP_NAME, emu->hwdep_idx, &hw)) < 0)
	120	return err;
	121	emu->hwdep = hw;
	122	strcpy(hw->name, SNDRV_EMUX_HWDEP_NAME);
	123	hw->iface = SNDRV_HWDEP_IFACE_EMUX_WAVETABLE;
1da177e4	124	hw->ops.ioctl = snd_emux_hwdep_ioctl;
a254dba3 BH	125	/* The ioctl parameter types are compatible between 32- and
	126	* 64-bit architectures, so use the same function. */
	127	hw->ops.ioctl_compat = snd_emux_hwdep_ioctl;
1da177e4 LT	128	hw->exclusive = 1;
	129	hw->private_data = emu;
	130	if ((err = snd_card_register(emu->card)) < 0)
	131	return err;
	132
	133	return 0;
	134	}
	135
	136
	137	/*
	138	* unregister
	139	*/
	140	void
03da312a	141	snd_emux_delete_hwdep(struct snd_emux *emu)
1da177e4 LT	142	{
	143	if (emu->hwdep) {
	144	snd_device_free(emu->card, emu->hwdep);
	145	emu->hwdep = NULL;
	146	}
	147	}