emufx.c

鼎力推荐！本程序是基于嵌入式LUNUX系统开发的源程序代码

/*
 *  Copyright (c) by Jaroslav Kysela <[e-mail]>
 *                   Creative Labs, Inc.
 *  Routines for effect processor FX8010
 *
 *  BUGS:
 *    --
 *
 *  TODO:
 *    --
 *
 *   This program is free software; you can redistribute it and/or modify
 *   it under the terms of the GNU General Public License as published by
 *   the Free Software Foundation; either version 2 of the License, or
 *   (at your option) any later version.
 *
 *   This program is distributed in the hope that it will be useful,
 *   but WITHOUT ANY WARRANTY; without even the implied warranty of
 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *   GNU General Public License for more details.
 *
 *   You should have received a copy of the GNU General Public License
 *   along with this program; if not, write to the Free Software
 *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
 *
 */

#include <sound/driver.h>
#include <linux/pci.h>
#include <linux/delay.h>
#include <linux/slab.h>
#include <linux/init.h>
#include <sound/core.h>
#include <sound/emu10k1.h>

#if 0		/* for testing purposes - digital out -> capture */
#define EMU10K1_CAPTURE_DIGITAL_OUT
#endif
#if 0		/* for testing purposes - set S/PDIF to AC3 output */
#define EMU10K1_SET_AC3_IEC958
#endif
#if 0		/* for testing purposes - feed the front signal to Center/LFE outputs */
#define EMU10K1_CENTER_LFE_FROM_FRONT
#endif

/*
 *  Tables
 */ 

static char *fxbuses[16] = {
	/* 0x00 */ "PCM Left",
	/* 0x01 */ "PCM Right",
	/* 0x02 */ "PCM Surround Left",
	/* 0x03 */ "PCM Surround Right",
	/* 0x04 */ "MIDI Left",
	/* 0x05 */ "MIDI Right",
	/* 0x06 */ "Center",
	/* 0x07 */ "LFE",
	/* 0x08 */ NULL,
	/* 0x09 */ NULL,
	/* 0x0a */ NULL,
	/* 0x0b */ NULL,
	/* 0x0c */ "MIDI Reverb",
	/* 0x0d */ "MIDI Chorus",
	/* 0x0e */ NULL,
	/* 0x0f */ NULL
};

static char *creative_ins[16] = {
	/* 0x00 */ "AC97 Left",
	/* 0x01 */ "AC97 Right",
	/* 0x02 */ "TTL IEC958 Left",
	/* 0x03 */ "TTL IEC958 Right",
	/* 0x04 */ "Zoom Video Left",
	/* 0x05 */ "Zoom Video Right",
	/* 0x06 */ "Optical IEC958 Left",
	/* 0x07 */ "Optical IEC958 Right",
	/* 0x08 */ "Line/Mic 1 Left",
	/* 0x09 */ "Line/Mic 1 Right",
	/* 0x0a */ "Coaxial IEC958 Left",
	/* 0x0b */ "Coaxial IEC958 Right",
	/* 0x0c */ "Line/Mic 2 Left",
	/* 0x0d */ "Line/Mic 2 Right",
	/* 0x0e */ NULL,
	/* 0x0f */ NULL
};

static char *audigy_ins[16] = {
	/* 0x00 */ "AC97 Left",
	/* 0x01 */ "AC97 Right",
	/* 0x02 */ "Audigy CD Left",
	/* 0x03 */ "Audigy CD Right",
	/* 0x04 */ "Optical IEC958 Left",
	/* 0x05 */ "Optical IEC958 Right",
	/* 0x06 */ NULL,
	/* 0x07 */ NULL,
	/* 0x08 */ "Line/Mic 2 Left",
	/* 0x09 */ "Line/Mic 2 Right",
	/* 0x0a */ "SPDIF Left",
	/* 0x0b */ "SPDIF Right",
	/* 0x0c */ "Aux2 Left",
	/* 0x0d */ "Aux2 Right",
	/* 0x0e */ NULL,
	/* 0x0f */ NULL
};

static char *creative_outs[32] = {
	/* 0x00 */ "AC97 Left",
	/* 0x01 */ "AC97 Right",
	/* 0x02 */ "Optical IEC958 Left",
	/* 0x03 */ "Optical IEC958 Right",
	/* 0x04 */ "Center",
	/* 0x05 */ "LFE",
	/* 0x06 */ "Headphone Left",
	/* 0x07 */ "Headphone Right",
	/* 0x08 */ "Surround Left",
	/* 0x09 */ "Surround Right",
	/* 0x0a */ "PCM Capture Left",
	/* 0x0b */ "PCM Capture Right",
	/* 0x0c */ "MIC Capture",
	/* 0x0d */ "AC97 Surround Left",
	/* 0x0e */ "AC97 Surround Right",
	/* 0x0f */ NULL,
	/* 0x10 */ NULL,
	/* 0x11 */ "Analog Center",
	/* 0x12 */ "Analog LFE",
	/* 0x13 */ NULL,
	/* 0x14 */ NULL,
	/* 0x15 */ NULL,
	/* 0x16 */ NULL,
	/* 0x17 */ NULL,
	/* 0x18 */ NULL,
	/* 0x19 */ NULL,
	/* 0x1a */ NULL,
	/* 0x1b */ NULL,
	/* 0x1c */ NULL,
	/* 0x1d */ NULL,
	/* 0x1e */ NULL,
	/* 0x1f */ NULL,
};

static char *audigy_outs[32] = {
	/* 0x00 */ "Digital Front Left",
	/* 0x01 */ "Digital Front Right",
	/* 0x02 */ "Digital Center",
	/* 0x03 */ "Digital LEF",
	/* 0x04 */ "Headphone Left",
	/* 0x05 */ "Headphone Right",
	/* 0x06 */ "Digital Rear Left",
	/* 0x07 */ "Digital Rear Right",
	/* 0x08 */ "Front Left",
	/* 0x09 */ "Front Right",
	/* 0x0a */ "Center",
	/* 0x0b */ "LFE",
	/* 0x0c */ NULL,
	/* 0x0d */ NULL,
	/* 0x0e */ "Rear Left",
	/* 0x0f */ "Rear Right",
	/* 0x10 */ "AC97 Front Left",
	/* 0x11 */ "AC97 Front Right",
	/* 0x12 */ "ADC Caputre Left",
	/* 0x13 */ "ADC Capture Right",
	/* 0x14 */ NULL,
	/* 0x15 */ NULL,
	/* 0x16 */ NULL,
	/* 0x17 */ NULL,
	/* 0x18 */ NULL,
	/* 0x19 */ NULL,
	/* 0x1a */ NULL,
	/* 0x1b */ NULL,
	/* 0x1c */ NULL,
	/* 0x1d */ NULL,
	/* 0x1e */ NULL,
	/* 0x1f */ NULL,
};

static const u32 bass_table[41][5] = {
	{ 0x3e4f844f, 0x84ed4cc3, 0x3cc69927, 0x7b03553a, 0xc4da8486 },
	{ 0x3e69a17a, 0x84c280fb, 0x3cd77cd4, 0x7b2f2a6f, 0xc4b08d1d },
	{ 0x3e82ff42, 0x849991d5, 0x3ce7466b, 0x7b5917c6, 0xc48863ee },
	{ 0x3e9bab3c, 0x847267f0, 0x3cf5ffe8, 0x7b813560, 0xc461f22c },
	{ 0x3eb3b275, 0x844ced29, 0x3d03b295, 0x7ba79a1c, 0xc43d223b },
	{ 0x3ecb2174, 0x84290c8b, 0x3d106714, 0x7bcc5ba3, 0xc419dfa5 },
	{ 0x3ee2044b, 0x8406b244, 0x3d1c2561, 0x7bef8e77, 0xc3f8170f },
	{ 0x3ef86698, 0x83e5cb96, 0x3d26f4d8, 0x7c114600, 0xc3d7b625 },
	{ 0x3f0e5390, 0x83c646c9, 0x3d30dc39, 0x7c319498, 0xc3b8ab97 },
	{ 0x3f23d60b, 0x83a81321, 0x3d39e1af, 0x7c508b9c, 0xc39ae704 },
	{ 0x3f38f884, 0x838b20d2, 0x3d420ad2, 0x7c6e3b75, 0xc37e58f1 },
	{ 0x3f4dc52c, 0x836f60ef, 0x3d495cab, 0x7c8ab3a6, 0xc362f2be },
	{ 0x3f6245e8, 0x8354c565, 0x3d4fdbb8, 0x7ca602d6, 0xc348a69b },
	{ 0x3f76845f, 0x833b40ec, 0x3d558bf0, 0x7cc036df, 0xc32f677c },
	{ 0x3f8a8a03, 0x8322c6fb, 0x3d5a70c4, 0x7cd95cd7, 0xc317290b },
	{ 0x3f9e6014, 0x830b4bc3, 0x3d5e8d25, 0x7cf1811a, 0xc2ffdfa5 },
	{ 0x3fb20fae, 0x82f4c420, 0x3d61e37f, 0x7d08af56, 0xc2e9804a },
	{ 0x3fc5a1cc, 0x82df2592, 0x3d6475c3, 0x7d1ef294, 0xc2d40096 },
	{ 0x3fd91f55, 0x82ca6632, 0x3d664564, 0x7d345541, 0xc2bf56b9 },
	{ 0x3fec9120, 0x82b67cac, 0x3d675356, 0x7d48e138, 0xc2ab796e },
	{ 0x40000000, 0x82a36037, 0x3d67a012, 0x7d5c9fc9, 0xc2985fee },
	{ 0x401374c7, 0x8291088a, 0x3d672b93, 0x7d6f99c3, 0xc28601f2 },
	{ 0x4026f857, 0x827f6dd7, 0x3d65f559, 0x7d81d77c, 0xc27457a3 },
	{ 0x403a939f, 0x826e88c5, 0x3d63fc63, 0x7d9360d4, 0xc2635996 },
	{ 0x404e4faf, 0x825e5266, 0x3d613f32, 0x7da43d42, 0xc25300c6 },
	{ 0x406235ba, 0x824ec434, 0x3d5dbbc3, 0x7db473d7, 0xc243468e },
	{ 0x40764f1f, 0x823fd80c, 0x3d596f8f, 0x7dc40b44, 0xc23424a2 },
	{ 0x408aa576, 0x82318824, 0x3d545787, 0x7dd309e2, 0xc2259509 },
	{ 0x409f4296, 0x8223cf0b, 0x3d4e7012, 0x7de175b5, 0xc2179218 },
	{ 0x40b430a0, 0x8216a7a1, 0x3d47b505, 0x7def5475, 0xc20a1670 },
	{ 0x40c97a0a, 0x820a0d12, 0x3d4021a1, 0x7dfcab8d, 0xc1fd1cf5 },
	{ 0x40df29a6, 0x81fdfad6, 0x3d37b08d, 0x7e098028, 0xc1f0a0ca },
	{ 0x40f54ab1, 0x81f26ca9, 0x3d2e5bd1, 0x7e15d72b, 0xc1e49d52 },
	{ 0x410be8da, 0x81e75e89, 0x3d241cce, 0x7e21b544, 0xc1d90e24 },
	{ 0x41231051, 0x81dcccb3, 0x3d18ec37, 0x7e2d1ee6, 0xc1cdef10 },
	{ 0x413acdd0, 0x81d2b39e, 0x3d0cc20a, 0x7e38184e, 0xc1c33c13 },
	{ 0x41532ea7, 0x81c90ffb, 0x3cff9585, 0x7e42a58b, 0xc1b8f15a },
	{ 0x416c40cd, 0x81bfdeb2, 0x3cf15d21, 0x7e4cca7c, 0xc1af0b3f },
	{ 0x418612ea, 0x81b71cdc, 0x3ce20e85, 0x7e568ad3, 0xc1a58640 },
	{ 0x41a0b465, 0x81aec7c5, 0x3cd19e7c, 0x7e5fea1e, 0xc19c5f03 },
	{ 0x41bc3573, 0x81a6dcea, 0x3cc000e9, 0x7e68ebc2, 0xc1939250 }
};

static const u32 treble_table[41][5] = {
	{ 0x0125cba9, 0xfed5debd, 0x00599b6c, 0x0d2506da, 0xfa85b354 },
	{ 0x0142f67e, 0xfeb03163, 0x0066cd0f, 0x0d14c69d, 0xfa914473 },
	{ 0x016328bd, 0xfe860158, 0x0075b7f2, 0x0d03eb27, 0xfa9d32d2 },
	{ 0x0186b438, 0xfe56c982, 0x00869234, 0x0cf27048, 0xfaa97fca },
	{ 0x01adf358, 0xfe21f5fe, 0x00999842, 0x0ce051c2, 0xfab62ca5 },
	{ 0x01d949fa, 0xfde6e287, 0x00af0d8d, 0x0ccd8b4a, 0xfac33aa7 },
	{ 0x02092669, 0xfda4d8bf, 0x00c73d4c, 0x0cba1884, 0xfad0ab07 },
	{ 0x023e0268, 0xfd5b0e4a, 0x00e27b54, 0x0ca5f509, 0xfade7ef2 },
	{ 0x0278645c, 0xfd08a2b0, 0x01012509, 0x0c911c63, 0xfaecb788 },
	{ 0x02b8e091, 0xfcac9d1a, 0x0123a262, 0x0c7b8a14, 0xfafb55df },
	{ 0x03001a9a, 0xfc45e9ce, 0x014a6709, 0x0c65398f, 0xfb0a5aff },
	{ 0x034ec6d7, 0xfbd3576b, 0x0175f397, 0x0c4e2643, 0xfb19c7e4 },
	{ 0x03a5ac15, 0xfb5393ee, 0x01a6d6ed, 0x0c364b94, 0xfb299d7c },
	{ 0x0405a562, 0xfac52968, 0x01ddafae, 0x0c1da4e2, 0xfb39dca5 },
	{ 0x046fa3fe, 0xfa267a66, 0x021b2ddd, 0x0c042d8d, 0xfb4a8631 },
	{ 0x04e4b17f, 0xf975be0f, 0x0260149f, 0x0be9e0f2, 0xfb5b9ae0 },
	{ 0x0565f220, 0xf8b0fbe5, 0x02ad3c29, 0x0bceba73, 0xfb6d1b60 },
	{ 0x05f4a745, 0xf7d60722, 0x030393d4, 0x0bb2b578, 0xfb7f084d },
	{ 0x06923236, 0xf6e279bd, 0x03642465, 0x0b95cd75, 0xfb916233 },
	{ 0x07401713, 0xf5d3aef9, 0x03d01283, 0x0b77fded, 0xfba42984 },
	{ 0x08000000, 0xf4a6bd88, 0x0448a161, 0x0b594278, 0xfbb75e9f },
	{ 0x08d3c097, 0xf3587131, 0x04cf35a4, 0x0b3996c9, 0xfbcb01cb },
	{ 0x09bd59a2, 0xf1e543f9, 0x05655880, 0x0b18f6b2, 0xfbdf1333 },
	{ 0x0abefd0f, 0xf04956ca, 0x060cbb12, 0x0af75e2c, 0xfbf392e8 },
	{ 0x0bdb123e, 0xee806984, 0x06c739fe, 0x0ad4c962, 0xfc0880dd },
	{ 0x0d143a94, 0xec85d287, 0x0796e150, 0x0ab134b0, 0xfc1ddce5 },
	{ 0x0e6d5664, 0xea547598, 0x087df0a0, 0x0a8c9cb6, 0xfc33a6ad },
	{ 0x0fe98a2a, 0xe7e6ba35, 0x097edf83, 0x0a66fe5b, 0xfc49ddc2 },
	{ 0x118c4421, 0xe536813a, 0x0a9c6248, 0x0a4056d7, 0xfc608185 },
	{ 0x1359422e, 0xe23d19eb, 0x0bd96efb, 0x0a18a3bf, 0xfc77912c },
	{ 0x1554982b, 0xdef33645, 0x0d3942bd, 0x09efe312, 0xfc8f0bc1 },
	{ 0x1782b68a, 0xdb50deb1, 0x0ebf676d, 0x09c6133f, 0xfca6f019 },
	{ 0x19e8715d, 0xd74d64fd, 0x106fb999, 0x099b3337, 0xfcbf3cd6 },
	{ 0x1c8b07b8, 0xd2df56ab, 0x124e6ec8, 0x096f4274, 0xfcd7f060 },
	{ 0x1f702b6d, 0xcdfc6e92, 0x14601c10, 0x0942410b, 0xfcf108e5 },
	{ 0x229e0933, 0xc89985cd, 0x16a9bcfa, 0x09142fb5, 0xfd0a8451 },
	{ 0x261b5118, 0xc2aa8409, 0x1930bab6, 0x08e50fdc, 0xfd24604d },
	{ 0x29ef3f5d, 0xbc224f28, 0x1bfaf396, 0x08b4e3aa, 0xfd3e9a3b },
	{ 0x2e21a59b, 0xb4f2ba46, 0x1f0ec2d6, 0x0883ae15, 0xfd592f33 },
	{ 0x32baf44b, 0xad0c7429, 0x227308a3, 0x085172eb, 0xfd741bfd },
	{ 0x37c4448b, 0xa45ef51d, 0x262f3267, 0x081e36dc, 0xfd8f5d14 }
};

static const u32 db_table[101] = {
	0x00000000, 0x01571f82, 0x01674b41, 0x01783a1b, 0x0189f540,
	0x019c8651, 0x01aff763, 0x01c45306, 0x01d9a446, 0x01eff6b8,
	0x0207567a, 0x021fd03d, 0x0239714c, 0x02544792, 0x027061a1,
	0x028dcebb, 0x02ac9edc, 0x02cce2bf, 0x02eeabe8, 0x03120cb0,
	0x0337184e, 0x035de2df, 0x03868173, 0x03b10a18, 0x03dd93e9,
	0x040c3713, 0x043d0cea, 0x04702ff3, 0x04a5bbf2, 0x04ddcdfb,
	0x0518847f, 0x0555ff62, 0x05966005, 0x05d9c95d, 0x06206005,
	0x066a4a52, 0x06b7b067, 0x0708bc4c, 0x075d9a01, 0x07b6779d,
	0x08138561, 0x0874f5d5, 0x08dafde1, 0x0945d4ed, 0x09b5b4fd,
	0x0a2adad1, 0x0aa58605, 0x0b25f936, 0x0bac7a24, 0x0c3951d8,
	0x0ccccccc, 0x0d673b17, 0x0e08f093, 0x0eb24510, 0x0f639481,
	0x101d3f2d, 0x10dfa9e6, 0x11ab3e3f, 0x12806ac3, 0x135fa333,
	0x144960c5, 0x153e2266, 0x163e6cfe, 0x174acbb7, 0x1863d04d,
	0x198a1357, 0x1abe349f, 0x1c00db77, 0x1d52b712, 0x1eb47ee6,
	0x2026f30f, 0x21aadcb6, 0x23410e7e, 0x24ea64f9, 0x26a7c71d,
	0x287a26c4, 0x2a62812c, 0x2c61df84, 0x2e795779, 0x30aa0bcf,
	0x32f52cfe, 0x355bf9d8, 0x37dfc033, 0x3a81dda4, 0x3d43c038,
	0x4026e73c, 0x432ce40f, 0x46575af8, 0x49a8040f, 0x4d20ac2a,
	0x50c335d3, 0x54919a57, 0x588dead1, 0x5cba514a, 0x611911ea,
	0x65ac8c2f, 0x6a773c39, 0x6f7bbc23, 0x74bcc56c, 0x7a3d3272,
	0x7fffffff,
};

static const u32 onoff_table[2] = {
	0x00000000, 0x00000001
};

/*
 */
 
static inline mm_segment_t snd_enter_user(void)
{
	mm_segment_t fs = get_fs();
	set_fs(get_ds());
	return fs;
}

static inline void snd_leave_user(mm_segment_t fs)
{
	set_fs(fs);
}

/*
 *   controls
 */

static int snd_emu10k1_gpr_ctl_info(snd_kcontrol_t *kcontrol, snd_ctl_elem_info_t * uinfo)
{
	snd_emu10k1_fx8010_ctl_t *ctl = (snd_emu10k1_fx8010_ctl_t *)kcontrol->private_value;

	if (ctl->min == 0 && ctl->max == 1)
		uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
	else
		uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
	uinfo->count = ctl->vcount;
	uinfo->value.integer.min = ctl->min;
	uinfo->value.integer.max = ctl->max;
	return 0;
}

static int snd_emu10k1_gpr_ctl_get(snd_kcontrol_t * kcontrol, snd_ctl_elem_value_t * ucontrol)
{
	emu10k1_t *emu = snd_kcontrol_chip(kcontrol);
	snd_emu10k1_fx8010_ctl_t *ctl = (snd_emu10k1_fx8010_ctl_t *)kcontrol->private_value;
	unsigned long flags;
	unsigned int i;
	
	spin_lock_irqsave(&emu->reg_lock, flags);
	for (i = 0; i < ctl->vcount; i++)
		ucontrol->value.integer.value[i] = ctl->value[i];
	spin_unlock_irqrestore(&emu->reg_lock, flags);
	return 0;
}

static int snd_emu10k1_gpr_ctl_put(snd_kcontrol_t * kcontrol, snd_ctl_elem_value_t * ucontrol)
{
	emu10k1_t *emu = snd_kcontrol_chip(kcontrol);
	snd_emu10k1_fx8010_ctl_t *ctl = (snd_emu10k1_fx8010_ctl_t *)kcontrol->private_value;
	unsigned long flags;
	unsigned int nval, val;
	unsigned int i, j;