1 files changed, 335 insertions, 0 deletions
diff --git a/sys/dev/sound/pcm/ac97.c b/sys/dev/sound/pcm/ac97.c
new file mode 100644
index 0000000..b3da9cb
--- /dev/null
+++ b/sys/dev/sound/pcm/ac97.c
@@ -0,0 +1,335 @@
+/*
+ * Copyright (c) 1999 Cameron Grant <gandalf@vilnya.demon.co.uk>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ * $Id$
+ */
+
+#include <dev/pcm/sound.h>
+#include <dev/pcm/ac97.h>
+
+#define AC97_MUTE	0x8000
+
+#define AC97_REG_RESET	0x00
+#define AC97_MIX_MASTER	0x02
+#define AC97_MIX_PHONES	0x04
+#define AC97_MIX_MONO 	0x06
+#define AC97_MIX_TONE	0x08
+#define AC97_MIX_BEEP	0x0a
+#define AC97_MIX_PHONE	0x0c
+#define AC97_MIX_MIC	0x0e
+#define AC97_MIX_LINE	0x10
+#define AC97_MIX_CD	0x12
+#define AC97_MIX_VIDEO	0x14
+#define AC97_MIX_AUX	0x16
+#define AC97_MIX_PCM	0x18
+#define AC97_REG_RECSEL	0x1a
+#define AC97_MIX_RGAIN	0x1c
+#define AC97_MIX_MGAIN	0x1e
+#define AC97_REG_GEN	0x20
+#define AC97_REG_3D	0x22
+#define AC97_REG_POWER	0x26
+#define AC97_REG_ID1	0x7c
+#define AC97_REG_ID2	0x7e
+
+struct ac97mixtable_entry {
+	int		reg:8;
+	unsigned	bits:4;
+	unsigned	ofs:4;
+	unsigned	stereo:1;
+	unsigned	mute:1;
+	unsigned	recidx:4;
+	unsigned        mask:1;
+};
+
+struct ac97_info {
+	ac97_read *read;
+	ac97_write *write;
+	void *devinfo;
+	char id[4];
+	char rev;
+	unsigned caps, se;
+	struct ac97mixtable_entry mix[32];
+};
+
+struct ac97_codecid {
+	u_int32_t id;
+	char *name;
+};
+
+static const struct ac97mixtable_entry ac97mixtable_default[32] = {
+	[SOUND_MIXER_VOLUME]	= { AC97_MIX_MASTER, 	5, 0, 1, 1, 6, 0 },
+	[SOUND_MIXER_BASS]	= { AC97_MIX_TONE, 	4, 8, 0, 0, 0, 1 },
+	[SOUND_MIXER_TREBLE]	= { AC97_MIX_TONE, 	4, 0, 0, 0, 0, 1 },
+	[SOUND_MIXER_PCM]	= { AC97_MIX_PCM, 	5, 0, 1, 1, 0, 0 },
+	[SOUND_MIXER_SPEAKER]	= { AC97_MIX_BEEP, 	4, 1, 0, 1, 0, 0 },
+	[SOUND_MIXER_LINE]	= { AC97_MIX_LINE, 	5, 0, 1, 1, 5, 0 },
+	[SOUND_MIXER_MIC] 	= { AC97_MIX_MIC, 	5, 0, 0, 1, 1, 0 },
+	[SOUND_MIXER_CD]	= { AC97_MIX_CD, 	5, 0, 1, 1, 2, 0 },
+	[SOUND_MIXER_LINE1]	= { AC97_MIX_AUX, 	5, 0, 1, 1, 4, 0 },
+	[SOUND_MIXER_VIDEO]	= { AC97_MIX_VIDEO, 	5, 0, 1, 1, 3, 0 },
+	[SOUND_MIXER_RECLEV]	= { -AC97_MIX_RGAIN, 	4, 0, 1, 1, 0, 0 }
+};
+
+static const unsigned ac97mixdevs =
+	SOUND_MASK_VOLUME |
+	SOUND_MASK_PCM | SOUND_MASK_SPEAKER | SOUND_MASK_LINE |
+	SOUND_MASK_MIC | SOUND_MASK_CD | SOUND_MASK_LINE1 |
+	SOUND_MASK_VIDEO | SOUND_MASK_RECLEV;
+
+static const unsigned ac97recdevs =
+	SOUND_MASK_VOLUME | SOUND_MASK_LINE | SOUND_MASK_MIC |
+	SOUND_MASK_CD | SOUND_MASK_LINE1 | SOUND_MASK_VIDEO;
+
+static struct ac97_codecid ac97codecid[] = {
+	{ 0x414B4D00, "Asahi Kasei AK4540" 	},
+	{ 0x43525900, "Cirrus Logic CS4297" 	},
+	{ 0x83847600, "SigmaTel STAC????" 	},
+	{ 0x83847604, "SigmaTel STAC9701/3/4/5" },
+	{ 0x83847605, "SigmaTel STAC9704" 	},
+	{ 0x83847608, "SigmaTel STAC9708" 	},
+	{ 0x83847609, "SigmaTel STAC9721" 	},
+	{ 0, 	      NULL			}
+};
+
+static char *ac97enhancement[] = {
+	"",
+	"Analog Devices Phat Stereo",
+	"Creative Stereo Enhancement",
+	"National Semi 3D Stereo Enhancement",
+	"Yamaha Ymersion",
+	"BBE 3D Stereo Enhancement",
+	"Crystal Semi 3D Stereo Enhancement",
+	"Qsound QXpander",
+	"Spatializer 3D Stereo Enhancement",
+	"SRS 3D Stereo Enhancement",
+	"Platform Tech 3D Stereo Enhancement",
+	"AKM 3D Audio",
+	"Aureal Stereo Enhancement",
+	"Aztech 3D Enhancement",
+	"Binaura 3D Audio Enhancement",
+	"ESS Technology Stereo Enhancement",
+	"Harman International VMAx",
+	"Nvidea 3D Stereo Enhancement",
+	"Philips Incredible Sound",
+	"Texas Instruments 3D Stereo Enhancement",
+	"VLSI Technology 3D Stereo Enhancement",
+	"TriTech 3D Stereo Enhancement",
+	"Realtek 3D Stereo Enhancement",
+	"Samsung 3D Stereo Enhancement",
+	"Wolfson Microelectronics 3D Enhancement",
+	"Delta Integration 3D Enhancement",
+	"SigmaTel 3D Enhancement",
+	"Reserved 27",
+	"Rockwell 3D Stereo Enhancement",
+	"Reserved 29",
+	"Reserved 30",
+	"Reserved 31"
+};
+
+static char *ac97feature[] = {
+	"mic channel",
+	"reserved",
+	"tone",
+	"simulated stereo",
+	"headphone",
+	"bass boost",
+	"18 bit DAC",
+	"20 bit DAC",
+	"18 bit ADC",
+	"20 bit ADC"
+};
+
+static int
+ac97_setrecsrc(struct ac97_info *codec, int channel)
+{
+	struct ac97mixtable_entry *e = &codec->mix[channel];
+	if (e->recidx > 0) {
+		int val = e->recidx - 1;
+		val |= val << 8;
+		codec->write(codec->devinfo, AC97_REG_RECSEL, val);
+		return 0;
+	} else return -1;
+}
+
+static int
+ac97_setmixer(struct ac97_info *codec, unsigned channel, unsigned left, unsigned right)
+{
+	struct ac97mixtable_entry *e = &codec->mix[channel];
+	if (e->reg != 0) {
+		int max, val;
+
+		if (!e->stereo) right = left;
+		if (e->reg > 0) {
+			left = 100 - left;
+			right = 100 - right;
+		}
+
+		max = (1 << e->bits) - 1;
+		left = (left * max) / 100;
+		right = (right * max) / 100;
+
+		val = (left << 8) | right;
+
+		left = (left * 100) / max;
+		right = (right * 100) / max;
+
+		if (e->reg > 0) {
+			left = 100 - left;
+			right = 100 - right;
+		}
+
+		if (!e->stereo) {
+			val &= max;
+			val <<= e->ofs;
+			if (e->mask) {
+				int cur = codec->read(codec->devinfo, e->reg);
+				val |= cur & ~(max << e->ofs);
+			}
+		}
+		if (left == 0 && right == 0 && e->mute == 1) val = AC97_MUTE;
+		codec->write(codec->devinfo, abs(e->reg), val);
+		return left | (right << 8);
+	} else return -1;
+}
+
+#if 0
+static int
+ac97_getmixer(struct ac97_info *codec, int channel)
+{
+	struct ac97mixtable_entry *e = &codec->mix[channel];
+	if (channel < SOUND_MIXER_NRDEVICES && e->reg != 0) {
+		int max, val, volume;
+
+		max = (1 << e->bits) - 1;
+		val = codec->read(codec->devinfo, e->reg);
+		if (val == AC97_MUTE && e->mute == 1) volume = 0;
+		else {
+			if (e->stereo == 0) val >>= e->ofs;
+			val &= max;
+			volume = (val * 100) / max;
+			if (e->reg > 0) volume = 100 - volume;
+		}
+		return volume;
+	} else return -1;
+}
+#endif
+
+static unsigned
+ac97_init(struct ac97_info *codec)
+{
+	unsigned i, j;
+	u_int32_t id;
+
+	for (i = 0; i < 32; i++) codec->mix[i] = ac97mixtable_default[i];
+
+	codec->write(codec->devinfo, AC97_REG_POWER, 0);
+	codec->write(codec->devinfo, AC97_REG_RESET, 0);
+	DELAY(10000);
+
+	i = codec->read(codec->devinfo, AC97_REG_RESET);
+	codec->caps = i & 0x03ff;
+	codec->se =  (i & 0x7c00) >> 10;
+
+	id = (codec->read(codec->devinfo, AC97_REG_ID1) << 16) |
+	      codec->read(codec->devinfo, AC97_REG_ID2);
+	codec->rev = id & 0x000000ff;
+
+	codec->write(codec->devinfo, AC97_MIX_MASTER, 0x20);
+	if ((codec->read(codec->devinfo, AC97_MIX_MASTER) & 0x20) == 0x20)
+		codec->mix[SOUND_MIXER_VOLUME].bits++;
+	codec->write(codec->devinfo, AC97_MIX_MASTER, 0x00);
+
+	if (bootverbose) {
+		printf("ac97: codec id 0x%8x", id);
+		for (i = 0; ac97codecid[i].id; i++) {
+			if (ac97codecid[i].id == id) printf(" (%s)", ac97codecid[i].name);
+		}
+		printf("\nac97: codec features ");
+		for (i = j = 0; i < 10; i++) {
+			if (codec->caps & (1 << i)) {
+				printf("%s%s", j? ", " : "", ac97feature[i]);
+				j++;
+			}
+		}
+		printf("%s%d bit master volume", j? ", " : "", codec->mix[SOUND_MIXER_VOLUME].bits);
+		printf("%s%s\n", j? ", " : "", ac97enhancement[codec->se]);
+	}
+
+	if ((codec->read(codec->devinfo, AC97_REG_POWER) & 2) == 0)
+		printf("ac97: dac not ready\n");
+	return 0;
+}
+
+struct ac97_info *
+ac97_create(void *devinfo, ac97_read *rd, ac97_write *wr)
+{
+	struct ac97_info *codec;
+
+	codec = (struct ac97_info *)malloc(sizeof *codec, M_DEVBUF, M_NOWAIT);
+	if (codec != NULL) {
+		codec->read = rd;
+		codec->write = wr;
+		codec->devinfo = devinfo;
+	}
+	return codec;
+}
+
+static int
+ac97mix_init(snd_mixer *m)
+{
+	struct ac97_info *codec = mix_getdevinfo(m);
+	if (codec == NULL) return -1;
+	ac97_init(codec);
+	mix_setdevs(m, ac97mixdevs | ((codec->caps & 4)? SOUND_MASK_BASS | SOUND_MASK_TREBLE : 0));
+	mix_setrecdevs(m, ac97recdevs);
+	return 0;
+}
+
+static int
+ac97mix_set(snd_mixer *m, unsigned dev, unsigned left, unsigned right)
+{
+	struct ac97_info *codec = mix_getdevinfo(m);
+	if (codec == NULL) return -1;
+	return ac97_setmixer(codec, dev, left, right);
+}
+
+static int
+ac97mix_setrecsrc(snd_mixer *m, u_int32_t src)
+{
+	int i;
+	struct ac97_info *codec = mix_getdevinfo(m);
+	if (codec == NULL) return -1;
+	for (i = 0; i < SOUND_MIXER_NRDEVICES; i++)
+		if ((src & (1 << i)) != 0) break;
+	return (ac97_setrecsrc(codec, i) == 0)? 1 << i : -1;
+}
+
+snd_mixer ac97_mixer = {
+	"AC97 mixer",
+	ac97mix_init,
+	ac97mix_set,
+	ac97mix_setrecsrc,
+};
+