Linux-2.6.12-rc2v2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 1832 insertions, 0 deletions

diff --git a/sound/oss/sb_ess.c b/sound/oss/sb_ess.c
new file mode 100644
index 000000000000..fae05fe3de43
--- /dev/null
+++ b/sound/oss/sb_ess.c
@@ -0,0 +1,1832 @@
+#undef FKS_LOGGING
+#undef FKS_TEST
+
+/*
+ * tabs should be 4 spaces, in vi(m): set tabstop=4
+ *
+ * TODO: 	consistency speed calculations!!
+ *			cleanup!
+ * ????:	Did I break MIDI support?
+ *
+ * History:
+ *
+ * Rolf Fokkens	 (Dec 20 1998):	ES188x recording level support on a per
+ * fokkensr@vertis.nl			input basis.
+ *				 (Dec 24 1998):	Recognition of ES1788, ES1887, ES1888,
+ *								ES1868, ES1869 and ES1878. Could be used for
+ *								specific handling in the future. All except
+ *								ES1887 and ES1888 and ES688 are handled like
+ *								ES1688.
+ *				 (Dec 27 1998):	RECLEV for all (?) ES1688+ chips. ES188x now
+ *								have the "Dec 20" support + RECLEV
+ *				 (Jan  2 1999):	Preparation for Full Duplex. This means
+ *								Audio 2 is now used for playback when dma16
+ *								is specified. The next step would be to use
+ *								Audio 1 and Audio 2 at the same time.
+ *				 (Jan  9 1999):	Put all ESS stuff into sb_ess.[ch], this
+ *								includes both the ESS stuff that has been in
+ *								sb_*[ch] before I touched it and the ESS support
+ *								I added later
+ *				 (Jan 23 1999):	Full Duplex seems to work. I wrote a small
+ *								test proggy which works OK. Haven't found
+ *								any applications to test it though. So why did
+ *								I bother to create it anyway?? :) Just for
+ *								fun.
+ *				 (May  2 1999):	I tried to be too smart by "introducing"
+ *								ess_calc_best_speed (). The idea was that two
+ *								dividers could be used to setup a samplerate,
+ *								ess_calc_best_speed () would choose the best.
+ *								This works for playback, but results in
+ *								recording problems for high samplerates. I
+ *								fixed this by removing ess_calc_best_speed ()
+ *								and just doing what the documentation says. 
+ * Andy Sloane   (Jun  4 1999): Stole some code from ALSA to fix the playback
+ * andy@guildsoftware.com		speed on ES1869, ES1879, ES1887, and ES1888.
+ * 								1879's were previously ignored by this driver;
+ * 								added (untested) support for those.
+ * Cvetan Ivanov (Oct 27 1999): Fixed ess_dsp_init to call ess_set_dma_hw for
+ * zezo@inet.bg					_ALL_ ESS models, not only ES1887
+ *
+ * This files contains ESS chip specifics. It's based on the existing ESS
+ * handling as it resided in sb_common.c, sb_mixer.c and sb_audio.c. This
+ * file adds features like:
+ * - Chip Identification (as shown in /proc/sound)
+ * - RECLEV support for ES1688 and later
+ * - 6 bits playback level support chips later than ES1688
+ * - Recording level support on a per-device basis for ES1887
+ * - Full-Duplex for ES1887
+ *
+ * Full duplex is enabled by specifying dma16. While the normal dma must
+ * be one of 0, 1 or 3, dma16 can be one of 0, 1, 3 or 5. DMA 5 is a 16 bit
+ * DMA channel, while the others are 8 bit..
+ *
+ * ESS detection isn't full proof (yet). If it fails an additional module
+ * parameter esstype can be specified to be one of the following:
+ * -1, 0, 688, 1688, 1868, 1869, 1788, 1887, 1888
+ * -1 means: mimic 2.0 behaviour, 
+ *  0 means: auto detect.
+ *   others: explicitly specify chip
+ * -1 is default, cause auto detect still doesn't work.
+ */
+
+/*
+ * About the documentation
+ *
+ * I don't know if the chips all are OK, but the documentation is buggy. 'cause
+ * I don't have all the cips myself, there's a lot I cannot verify. I'll try to
+ * keep track of my latest insights about his here. If you have additional info,
+ * please enlighten me (fokkensr@vertis.nl)!
+ *
+ * I had the impression that ES1688 also has 6 bit master volume control. The
+ * documentation about ES1888 (rev C, october '95) claims that ES1888 has
+ * the following features ES1688 doesn't have:
+ * - 6 bit master volume
+ * - Full Duplex
+ * So ES1688 apparently doesn't have 6 bit master volume control, but the
+ * ES1688 does have RECLEV control. Makes me wonder: does ES688 have it too?
+ * Without RECLEV ES688 won't be much fun I guess.
+ *
+ * From the ES1888 (rev C, october '95) documentation I got the impression
+ * that registers 0x68 to 0x6e don't exist which means: no recording volume
+ * controls. To my surprise the ES888 documentation (1/14/96) claims that
+ * ES888 does have these record mixer registers, but that ES1888 doesn't have
+ * 0x69 and 0x6b. So the rest should be there.
+ *
+ * I'm trying to get ES1887 Full Duplex. Audio 2 is playback only, while Audio 2
+ * is both record and playback. I think I should use Audio 2 for all playback.
+ *
+ * The documentation is an adventure: it's close but not fully accurate. I
+ * found out that after a reset some registers are *NOT* reset, though the
+ * docs say the would be. Interresting ones are 0x7f, 0x7d and 0x7a. They are
+ * related to the Audio 2 channel. I also was suprised about the consequenses
+ * of writing 0x00 to 0x7f (which should be done by reset): The ES1887 moves
+ * into ES1888 mode. This means that it claims IRQ 11, which happens to be my
+ * ISDN adapter. Needless to say it no longer worked. I now understand why
+ * after rebooting 0x7f already was 0x05, the value of my choice: the BIOS
+ * did it.
+ *
+ * Oh, and this is another trap: in ES1887 docs mixer register 0x70 is decribed
+ * as if it's exactly the same as register 0xa1. This is *NOT* true. The
+ * description of 0x70 in ES1869 docs is accurate however.
+ * Well, the assumption about ES1869 was wrong: register 0x70 is very much
+ * like register 0xa1, except that bit 7 is allways 1, whatever you want
+ * it to be.
+ *
+ * When using audio 2 mixer register 0x72 seems te be meaningless. Only 0xa2
+ * has effect.
+ *
+ * Software reset not being able to reset all registers is great! Especially
+ * the fact that register 0x78 isn't reset is great when you wanna change back
+ * to single dma operation (simplex): audio 2 is still operation, and uses the
+ * same dma as audio 1: your ess changes into a funny echo machine.
+ *
+ * Received the new that ES1688 is detected as a ES1788. Did some thinking:
+ * the ES1887 detection scheme suggests in step 2 to try if bit 3 of register
+ * 0x64 can be changed. This is inaccurate, first I inverted the * check: "If
+ * can be modified, it's a 1688", which lead to a correct detection
+ * of my ES1887. It resulted however in bad detection of 1688 (reported by mail)
+ * and 1868 (if no PnP detection first): they result in a 1788 being detected.
+ * I don't have docs on 1688, but I do have docs on 1868: The documentation is
+ * probably inaccurate in the fact that I should check bit 2, not bit 3. This
+ * is what I do now.
+ */
+
+/*
+ * About recognition of ESS chips
+ *
+ * The distinction of ES688, ES1688, ES1788, ES1887 and ES1888 is described in
+ * a (preliminary ??) datasheet on ES1887. It's aim is to identify ES1887, but
+ * during detection the text claims that "this chip may be ..." when a step
+ * fails. This scheme is used to distinct between the above chips.
+ * It appears however that some PnP chips like ES1868 are recognized as ES1788
+ * by the ES1887 detection scheme. These PnP chips can be detected in another
+ * way however: ES1868, ES1869 and ES1878 can be recognized (full proof I think)
+ * by repeatedly reading mixer register 0x40. This is done by ess_identify in
+ * sb_common.c.
+ * This results in the following detection steps:
+ * - distinct between ES688 and ES1688+ (as always done in this driver)
+ *   if ES688 we're ready
+ * - try to detect ES1868, ES1869 or ES1878
+ *   if successful we're ready
+ * - try to detect ES1888, ES1887 or ES1788
+ *   if successful we're ready
+ * - Dunno. Must be 1688. Will do in general
+ *
+ * About RECLEV support:
+ *
+ * The existing ES1688 support didn't take care of the ES1688+ recording
+ * levels very well. Whenever a device was selected (recmask) for recording
+ * it's recording level was loud, and it couldn't be changed. The fact that
+ * internal register 0xb4 could take care of RECLEV, didn't work meaning until
+ * it's value was restored every time the chip was reset; this reset the
+ * value of 0xb4 too. I guess that's what 4front also had (have?) trouble with.
+ *
+ * About ES1887 support:
+ *
+ * The ES1887 has separate registers to control the recording levels, for all
+ * inputs. The ES1887 specific software makes these levels the same as their
+ * corresponding playback levels, unless recmask says they aren't recorded. In
+ * the latter case the recording volumes are 0.
+ * Now recording levels of inputs can be controlled, by changing the playback
+ * levels. Futhermore several devices can be recorded together (which is not
+ * possible with the ES1688.
+ * Besides the separate recording level control for each input, the common
+ * recordig level can also be controlled by RECLEV as described above.
+ *
+ * Not only ES1887 have this recording mixer. I know the following from the
+ * documentation:
+ * ES688	no
+ * ES1688	no
+ * ES1868	no
+ * ES1869	yes
+ * ES1878	no
+ * ES1879	yes
+ * ES1888	no/yes	Contradicting documentation; most recent: yes
+ * ES1946	yes		This is a PCI chip; not handled by this driver
+ */
+
+#include <linux/delay.h>
+#include <linux/interrupt.h>
+#include <linux/spinlock.h>
+
+#include "sound_config.h"
+#include "sb_mixer.h"
+#include "sb.h"
+
+#include "sb_ess.h"
+
+#define ESSTYPE_LIKE20	-1		/* Mimic 2.0 behaviour					*/
+#define ESSTYPE_DETECT	0		/* Mimic 2.0 behaviour					*/
+
+#define SUBMDL_ES1788	0x10	/* Subtype ES1788 for specific handling */
+#define SUBMDL_ES1868	0x11	/* Subtype ES1868 for specific handling */
+#define SUBMDL_ES1869	0x12	/* Subtype ES1869 for specific handling */
+#define SUBMDL_ES1878	0x13	/* Subtype ES1878 for specific handling */
+#define SUBMDL_ES1879	0x16    /* ES1879 was initially forgotten */
+#define SUBMDL_ES1887	0x14	/* Subtype ES1887 for specific handling */
+#define SUBMDL_ES1888	0x15	/* Subtype ES1888 for specific handling */
+
+#define SB_CAP_ES18XX_RATE 0x100
+
+#define ES1688_CLOCK1 795444 /* 128 - div */
+#define ES1688_CLOCK2 397722 /* 256 - div */
+#define ES18XX_CLOCK1 793800 /* 128 - div */
+#define ES18XX_CLOCK2 768000 /* 256 - div */
+
+#ifdef FKS_LOGGING
+static void ess_show_mixerregs (sb_devc *devc);
+#endif
+static int ess_read (sb_devc * devc, unsigned char reg);
+static int ess_write (sb_devc * devc, unsigned char reg, unsigned char data);
+static void ess_chgmixer
+	(sb_devc * devc, unsigned int reg, unsigned int mask, unsigned int val);
+
+/****************************************************************************
+ *																			*
+ *									ESS audio								*
+ *																			*
+ ****************************************************************************/
+
+struct ess_command {short cmd; short data;};
+
+/*
+ * Commands for initializing Audio 1 for input (record)
+ */
+static struct ess_command ess_i08m[] =		/* input 8 bit mono */
+	{ {0xb7, 0x51}, {0xb7, 0xd0}, {-1, 0} };
+static struct ess_command ess_i16m[] =		/* input 16 bit mono */
+	{ {0xb7, 0x71}, {0xb7, 0xf4}, {-1, 0} };
+static struct ess_command ess_i08s[] =		/* input 8 bit stereo */
+	{ {0xb7, 0x51}, {0xb7, 0x98}, {-1, 0} };
+static struct ess_command ess_i16s[] =		/* input 16 bit stereo */
+	{ {0xb7, 0x71}, {0xb7, 0xbc}, {-1, 0} };
+
+static struct ess_command *ess_inp_cmds[] =
+	{ ess_i08m, ess_i16m, ess_i08s, ess_i16s };
+
+
+/*
+ * Commands for initializing Audio 1 for output (playback)
+ */
+static struct ess_command ess_o08m[] =		/* output 8 bit mono */
+	{ {0xb6, 0x80}, {0xb7, 0x51}, {0xb7, 0xd0}, {-1, 0} };
+static struct ess_command ess_o16m[] =		/* output 16 bit mono */
+	{ {0xb6, 0x00}, {0xb7, 0x71}, {0xb7, 0xf4}, {-1, 0} };
+static struct ess_command ess_o08s[] =		/* output 8 bit stereo */
+	{ {0xb6, 0x80}, {0xb7, 0x51}, {0xb7, 0x98}, {-1, 0} };
+static struct ess_command ess_o16s[] =		/* output 16 bit stereo */
+	{ {0xb6, 0x00}, {0xb7, 0x71}, {0xb7, 0xbc}, {-1, 0} };
+
+static struct ess_command *ess_out_cmds[] =
+	{ ess_o08m, ess_o16m, ess_o08s, ess_o16s };
+
+static void ess_exec_commands
+	(sb_devc *devc, struct ess_command *cmdtab[])
+{
+	struct ess_command *cmd;
+
+	cmd = cmdtab [ ((devc->channels != 1) << 1) + (devc->bits != AFMT_U8) ];
+
+	while (cmd->cmd != -1) {
+		ess_write (devc, cmd->cmd, cmd->data);
+		cmd++;
+	}
+}
+
+static void ess_change
+	(sb_devc *devc, unsigned int reg, unsigned int mask, unsigned int val)
+{
+	int value;
+
+	value = ess_read (devc, reg);
+	value = (value & ~mask) | (val & mask);
+	ess_write (devc, reg, value);
+}
+
+static void ess_set_output_parms
+	(int dev, unsigned long buf, int nr_bytes, int intrflag)
+{
+	sb_devc *devc = audio_devs[dev]->devc;
+
+	if (devc->duplex) {
+		devc->trg_buf_16 = buf;
+		devc->trg_bytes_16 = nr_bytes;
+		devc->trg_intrflag_16 = intrflag;
+		devc->irq_mode_16 = IMODE_OUTPUT;
+	} else {
+		devc->trg_buf = buf;
+		devc->trg_bytes = nr_bytes;
+		devc->trg_intrflag = intrflag;
+		devc->irq_mode = IMODE_OUTPUT;
+	}
+}
+
+static void ess_set_input_parms
+	(int dev, unsigned long buf, int count, int intrflag)
+{
+	sb_devc *devc = audio_devs[dev]->devc;
+
+	devc->trg_buf = buf;
+	devc->trg_bytes = count;
+	devc->trg_intrflag = intrflag;
+	devc->irq_mode = IMODE_INPUT;
+}
+
+static int ess_calc_div (int clock, int revert, int *speedp, int *diffp)
+{
+	int divider;
+	int speed, diff;
+	int retval;
+
+	speed   = *speedp;
+	divider = (clock + speed / 2) / speed;
+	retval  = revert - divider;
+	if (retval > revert - 1) {
+		retval  = revert - 1;
+		divider = revert - retval;
+	}
+	/* This line is suggested. Must be wrong I think
+	*speedp = (clock + divider / 2) / divider;
+	So I chose the next one */
+
+	*speedp	= clock / divider;
+	diff	= speed - *speedp;
+	if (diff < 0) diff =-diff;
+	*diffp  = diff;
+
+	return retval;
+}
+
+static int ess_calc_best_speed
+	(int clock1, int rev1, int clock2, int rev2, int *divp, int *speedp)
+{
+	int speed1 = *speedp, speed2 = *speedp;
+	int div1, div2;
+	int diff1, diff2;
+	int retval;
+
+	div1 = ess_calc_div (clock1, rev1, &speed1, &diff1);
+	div2 = ess_calc_div (clock2, rev2, &speed2, &diff2);
+
+	if (diff1 < diff2) {
+		*divp   = div1;
+		*speedp = speed1;
+		retval  = 1;
+	} else {
+	/*	*divp   = div2; */
+		*divp   = 0x80 | div2;
+		*speedp = speed2;
+		retval  = 2;
+	}
+
+	return retval;
+}
+
+/*
+ * Depending on the audiochannel ESS devices can
+ * have different clock settings. These are made consistent for duplex
+ * however.
+ * callers of ess_speed only do an audionum suggestion, which means
+ * input suggests 1, output suggests 2. This suggestion is only true
+ * however when doing duplex.
+ */
+static void ess_common_speed (sb_devc *devc, int *speedp, int *divp)
+{
+	int diff = 0, div;
+
+	if (devc->duplex) {
+		/*
+		 * The 0x80 is important for the first audio channel
+		 */
+		if (devc->submodel == SUBMDL_ES1888) {
+			div = 0x80 | ess_calc_div (795500, 256, speedp, &diff);
+		} else {
+			div = 0x80 | ess_calc_div (795500, 128, speedp, &diff);
+		}
+	} else if(devc->caps & SB_CAP_ES18XX_RATE) {
+		if (devc->submodel == SUBMDL_ES1888) {
+			ess_calc_best_speed(397700, 128, 795500, 256, 
+						&div, speedp);
+		} else {
+			ess_calc_best_speed(ES18XX_CLOCK1, 128, ES18XX_CLOCK2, 256, 
+						&div, speedp);
+		}
+	} else {
+		if (*speedp > 22000) {
+			div = 0x80 | ess_calc_div (ES1688_CLOCK1, 256, speedp, &diff);
+		} else {
+			div = 0x00 | ess_calc_div (ES1688_CLOCK2, 128, speedp, &diff);
+		}
+	}
+	*divp = div;
+}
+
+static void ess_speed (sb_devc *devc, int audionum)
+{
+	int speed;
+	int div, div2;
+
+	ess_common_speed (devc, &(devc->speed), &div);
+
+#ifdef FKS_REG_LOGGING
+printk (KERN_INFO "FKS: ess_speed (%d) b speed = %d, div=%x\n", audionum, devc->speed, div);
+#endif
+
+	/* Set filter roll-off to 90% of speed/2 */
+	speed = (devc->speed * 9) / 20;
+
+	div2 = 256 - 7160000 / (speed * 82);
+
+	if (!devc->duplex) audionum = 1;
+
+	if (audionum == 1) {
+		/* Change behaviour of register A1 *
+		sb_chg_mixer(devc, 0x71, 0x20, 0x20)
+		* For ES1869 only??? */
+		ess_write (devc, 0xa1, div);
+		ess_write (devc, 0xa2, div2);
+	} else {
+		ess_setmixer (devc, 0x70, div);
+		/*
+		 * FKS: fascinating: 0x72 doesn't seem to work.
+		 */
+		ess_write (devc, 0xa2, div2);
+		ess_setmixer (devc, 0x72, div2);
+	}
+}
+
+static int ess_audio_prepare_for_input(int dev, int bsize, int bcount)
+{
+	sb_devc *devc = audio_devs[dev]->devc;
+
+	ess_speed(devc, 1);
+
+	sb_dsp_command(devc, DSP_CMD_SPKOFF);
+
+	ess_write (devc, 0xb8, 0x0e);	/* Auto init DMA mode */
+	ess_change (devc, 0xa8, 0x03, 3 - devc->channels);	/* Mono/stereo */
+	ess_write (devc, 0xb9, 2);	/* Demand mode (4 bytes/DMA request) */
+
+	ess_exec_commands (devc, ess_inp_cmds);
+
+	ess_change (devc, 0xb1, 0xf0, 0x50);
+	ess_change (devc, 0xb2, 0xf0, 0x50);
+
+	devc->trigger_bits = 0;
+	return 0;
+}
+
+static int ess_audio_prepare_for_output_audio1 (int dev, int bsize, int bcount)
+{
+	sb_devc *devc = audio_devs[dev]->devc;
+
+	sb_dsp_reset(devc);
+	ess_speed(devc, 1);
+	ess_write (devc, 0xb8, 4);	/* Auto init DMA mode */
+	ess_change (devc, 0xa8, 0x03, 3 - devc->channels);	/* Mono/stereo */
+	ess_write (devc, 0xb9, 2);	/* Demand mode (4 bytes/request) */
+
+	ess_exec_commands (devc, ess_out_cmds);
+
+	ess_change (devc, 0xb1, 0xf0, 0x50);	/* Enable DMA */
+	ess_change (devc, 0xb2, 0xf0, 0x50);	/* Enable IRQ */
+
+	sb_dsp_command(devc, DSP_CMD_SPKON);	/* There be sound! */
+
+	devc->trigger_bits = 0;
+	return 0;
+}
+
+static int ess_audio_prepare_for_output_audio2 (int dev, int bsize, int bcount)
+{
+	sb_devc *devc = audio_devs[dev]->devc;
+	unsigned char bits;
+
+/* FKS: qqq
+	sb_dsp_reset(devc);
+*/
+
+	/*
+	 * Auto-Initialize:
+	 * DMA mode + demand mode (8 bytes/request, yes I want it all!)
+	 * But leave 16-bit DMA bit untouched!
+	 */
+	ess_chgmixer (devc, 0x78, 0xd0, 0xd0);
+
+	ess_speed(devc, 2);
+
+	/* bits 4:3 on ES1887 represent recording source. Keep them! */
+	bits = ess_getmixer (devc, 0x7a) & 0x18;
+
+	/* Set stereo/mono */
+	if (devc->channels != 1) bits |= 0x02;
+
+	/* Init DACs; UNSIGNED mode for 8 bit; SIGNED mode for 16 bit */
+	if (devc->bits != AFMT_U8) bits |= 0x05;	/* 16 bit */
+
+	/* Enable DMA, IRQ will be shared (hopefully)*/
+	bits |= 0x60;
+
+	ess_setmixer (devc, 0x7a, bits);
+
+	ess_mixer_reload (devc, SOUND_MIXER_PCM);	/* There be sound! */
+
+	devc->trigger_bits = 0;
+	return 0;
+}
+
+static int ess_audio_prepare_for_output(int dev, int bsize, int bcount)
+{
+	sb_devc *devc = audio_devs[dev]->devc;
+
+#ifdef FKS_REG_LOGGING
+printk(KERN_INFO "ess_audio_prepare_for_output: dma_out=%d,dma_in=%d\n"
+, audio_devs[dev]->dmap_out->dma, audio_devs[dev]->dmap_in->dma);
+#endif
+
+	if (devc->duplex) {
+		return ess_audio_prepare_for_output_audio2 (dev, bsize, bcount);
+	} else {
+		return ess_audio_prepare_for_output_audio1 (dev, bsize, bcount);
+	}
+}
+
+static void ess_audio_halt_xfer(int dev)
+{
+	unsigned long flags;
+	sb_devc *devc = audio_devs[dev]->devc;
+
+	spin_lock_irqsave(&devc->lock, flags);
+	sb_dsp_reset(devc);
+	spin_unlock_irqrestore(&devc->lock, flags);
+
+	/*
+	 * Audio 2 may still be operational! Creates awful sounds!
+	 */
+	if (devc->duplex) ess_chgmixer(devc, 0x78, 0x03, 0x00);
+}
+
+static void ess_audio_start_input
+	(int dev, unsigned long buf, int nr_bytes, int intrflag)
+{
+	int count = nr_bytes;
+	sb_devc *devc = audio_devs[dev]->devc;
+	short c = -nr_bytes;
+
+	/*
+	 * Start a DMA input to the buffer pointed by dmaqtail
+	 */
+
+	if (audio_devs[dev]->dmap_in->dma > 3) count >>= 1;
+	count--;
+
+	devc->irq_mode = IMODE_INPUT;
+
+	ess_write (devc, 0xa4, (unsigned char) ((unsigned short) c & 0xff));
+	ess_write (devc, 0xa5, (unsigned char) (((unsigned short) c >> 8) & 0xff));
+
+	ess_change (devc, 0xb8, 0x0f, 0x0f);	/* Go */
+	devc->intr_active = 1;
+}
+
+static void ess_audio_output_block_audio1
+	(int dev, unsigned long buf, int nr_bytes, int intrflag)
+{
+	int count = nr_bytes;
+	sb_devc *devc = audio_devs[dev]->devc;
+	short c = -nr_bytes;
+
+	if (audio_devs[dev]->dmap_out->dma > 3)
+		count >>= 1;
+	count--;
+
+	devc->irq_mode = IMODE_OUTPUT;
+
+	ess_write (devc, 0xa4, (unsigned char) ((unsigned short) c & 0xff));
+	ess_write (devc, 0xa5, (unsigned char) (((unsigned short) c >> 8) & 0xff));
+
+	ess_change (devc, 0xb8, 0x05, 0x05);	/* Go */
+	devc->intr_active = 1;
+}
+
+static void ess_audio_output_block_audio2
+	(int dev, unsigned long buf, int nr_bytes, int intrflag)
+{
+	int count = nr_bytes;
+	sb_devc *devc = audio_devs[dev]->devc;
+	short c = -nr_bytes;
+
+	if (audio_devs[dev]->dmap_out->dma > 3) count >>= 1;
+	count--;
+
+	ess_setmixer (devc, 0x74, (unsigned char) ((unsigned short) c & 0xff));
+	ess_setmixer (devc, 0x76, (unsigned char) (((unsigned short) c >> 8) & 0xff));
+	ess_chgmixer (devc, 0x78, 0x03, 0x03);   /* Go */
+
+	devc->irq_mode_16 = IMODE_OUTPUT;
+		devc->intr_active_16 = 1;
+}
+
+static void ess_audio_output_block
+	(int dev, unsigned long buf, int nr_bytes, int intrflag)
+{
+	sb_devc *devc = audio_devs[dev]->devc;
+
+	if (devc->duplex) {
+		ess_audio_output_block_audio2 (dev, buf, nr_bytes, intrflag);
+	} else {
+		ess_audio_output_block_audio1 (dev, buf, nr_bytes, intrflag);
+	}
+}
+
+/*
+ * FKS: the if-statements for both bits and bits_16 are quite alike.
+ * Combine this...
+ */
+static void ess_audio_trigger(int dev, int bits)
+{
+	sb_devc *devc = audio_devs[dev]->devc;
+
+	int bits_16 = bits & devc->irq_mode_16;
+	bits &= devc->irq_mode;
+
+	if (!bits && !bits_16) {
+		/* FKS oh oh.... wrong?? for dma 16? */
+		sb_dsp_command(devc, 0xd0);	/* Halt DMA */
+	}
+
+	if (bits) {
+		switch (devc->irq_mode)
+		{
+			case IMODE_INPUT:
+				ess_audio_start_input(dev, devc->trg_buf, devc->trg_bytes,
+					devc->trg_intrflag);
+				break;
+
+			case IMODE_OUTPUT:
+				ess_audio_output_block(dev, devc->trg_buf, devc->trg_bytes,
+					devc->trg_intrflag);
+				break;
+		}
+	}
+
+	if (bits_16) {
+		switch (devc->irq_mode_16) {
+		case IMODE_INPUT:
+			ess_audio_start_input(dev, devc->trg_buf_16, devc->trg_bytes_16,
+					devc->trg_intrflag_16);
+			break;
+
+		case IMODE_OUTPUT:
+			ess_audio_output_block(dev, devc->trg_buf_16, devc->trg_bytes_16,
+					devc->trg_intrflag_16);
+			break;
+		}
+	}
+
+	devc->trigger_bits = bits | bits_16;
+}
+
+static int ess_audio_set_speed(int dev, int speed)
+{
+	sb_devc *devc = audio_devs[dev]->devc;
+	int minspeed, maxspeed, dummydiv;
+
+	if (speed > 0) {
+		minspeed = (devc->duplex ? 6215  : 5000 );
+		maxspeed = (devc->duplex ? 44100 : 48000);
+		if (speed < minspeed) speed = minspeed;
+		if (speed > maxspeed) speed = maxspeed;
+
+		ess_common_speed (devc, &speed, &dummydiv);
+
+		devc->speed = speed;
+	}
+	return devc->speed;
+}
+
+/*
+ * FKS: This is a one-on-one copy of sb1_audio_set_bits
+ */
+static unsigned int ess_audio_set_bits(int dev, unsigned int bits)
+{
+	sb_devc *devc = audio_devs[dev]->devc;
+
+	if (bits != 0) {
+		if (bits == AFMT_U8 || bits == AFMT_S16_LE) {
+			devc->bits = bits;
+		} else {
+			devc->bits = AFMT_U8;
+		}
+	}
+
+	return devc->bits;
+}
+
+/*
+ * FKS: This is a one-on-one copy of sbpro_audio_set_channels
+ * (*) Modified it!!
+ */
+static short ess_audio_set_channels(int dev, short channels)
+{
+	sb_devc *devc = audio_devs[dev]->devc;
+
+	if (channels == 1 || channels == 2) devc->channels = channels;
+
+	return devc->channels;
+}
+
+static struct audio_driver ess_audio_driver =   /* ESS ES688/1688 */
+{
+	.owner			= THIS_MODULE,
+	.open			= sb_audio_open,
+	.close			= sb_audio_close,
+	.output_block		= ess_set_output_parms,
+	.start_input		= ess_set_input_parms,
+	.prepare_for_input	= ess_audio_prepare_for_input,
+	.prepare_for_output	= ess_audio_prepare_for_output,
+	.halt_io		= ess_audio_halt_xfer,
+	.trigger		= ess_audio_trigger,
+	.set_speed		= ess_audio_set_speed,
+	.set_bits		= ess_audio_set_bits,
+	.set_channels		= ess_audio_set_channels
+};
+
+/*
+ * ess_audio_init must be called from sb_audio_init
+ */
+struct audio_driver *ess_audio_init
+		(sb_devc *devc, int *audio_flags, int *format_mask)
+{
+	*audio_flags = DMA_AUTOMODE;
+	*format_mask |= AFMT_S16_LE;
+
+	if (devc->duplex) {
+		int tmp_dma;
+		/*
+		 * sb_audio_init thinks dma8 is for playback and
+		 * dma16 is for record. Not now! So swap them.
+		 */
+		tmp_dma		= devc->dma16;
+		devc->dma16	= devc->dma8;
+		devc->dma8	= tmp_dma;
+
+		*audio_flags |= DMA_DUPLEX;
+	}
+
+	return &ess_audio_driver;
+}
+
+/****************************************************************************
+ *																			*
+ *								ESS common									*
+ *																			*
+ ****************************************************************************/
+static void ess_handle_channel
+	(char *channel, int dev, int intr_active, unsigned char flag, int irq_mode)
+{
+	if (!intr_active || !flag) return;
+#ifdef FKS_REG_LOGGING
+printk(KERN_INFO "FKS: ess_handle_channel %s irq_mode=%d\n", channel, irq_mode);
+#endif
+	switch (irq_mode) {
+		case IMODE_OUTPUT:
+			DMAbuf_outputintr (dev, 1);
+			break;
+
+		case IMODE_INPUT:
+			DMAbuf_inputintr (dev);
+			break;
+
+		case IMODE_INIT:
+			break;
+
+		default:;
+			/* printk(KERN_WARN "ESS: Unexpected interrupt\n"); */
+	}
+}
+
+/*
+ * FKS: TODO!!! Finish this!
+ *
+ * I think midi stuff uses uart401, without interrupts.
+ * So IMODE_MIDI isn't a value for devc->irq_mode.
+ */
+void ess_intr (sb_devc *devc)
+{
+	int				status;
+	unsigned char	src;
+
+	if (devc->submodel == SUBMDL_ES1887) {
+		src = ess_getmixer (devc, 0x7f) >> 4;
+	} else {
+		src = 0xff;
+	}
+
+#ifdef FKS_REG_LOGGING
+printk(KERN_INFO "FKS: sbintr src=%x\n",(int)src);
+#endif
+	ess_handle_channel
+		( "Audio 1"
+		, devc->dev, devc->intr_active   , src & 0x01, devc->irq_mode   );
+	ess_handle_channel
+		( "Audio 2"
+		, devc->dev, devc->intr_active_16, src & 0x02, devc->irq_mode_16);
+	/*
+	 * Acknowledge interrupts
+	 */
+	if (devc->submodel == SUBMDL_ES1887 && (src & 0x02)) {
+		ess_chgmixer (devc, 0x7a, 0x80, 0x00);
+	}
+
+	if (src & 0x01) {
+		status = inb(DSP_DATA_AVAIL);
+	}
+}
+
+static void ess_extended (sb_devc * devc)
+{
+	/* Enable extended mode */
+
+	sb_dsp_command(devc, 0xc6);
+}
+
+static int ess_write (sb_devc * devc, unsigned char reg, unsigned char data)
+{
+#ifdef FKS_REG_LOGGING
+printk(KERN_INFO "FKS: write reg %x: %x\n", reg, data);
+#endif
+	/* Write a byte to an extended mode register of ES1688 */
+
+	if (!sb_dsp_command(devc, reg))
+		return 0;
+
+	return sb_dsp_command(devc, data);
+}
+
+static int ess_read (sb_devc * devc, unsigned char reg)
+{
+	/* Read a byte from an extended mode register of ES1688 */
+
+	/* Read register command */
+	if (!sb_dsp_command(devc, 0xc0)) return -1;
+
+	if (!sb_dsp_command(devc, reg )) return -1;
+
+	return sb_dsp_get_byte(devc);
+}
+
+int ess_dsp_reset(sb_devc * devc)
+{
+	int loopc;
+
+#ifdef FKS_REG_LOGGING
+printk(KERN_INFO "FKS: ess_dsp_reset 1\n");
+ess_show_mixerregs (devc);
+#endif
+
+	DEB(printk("Entered ess_dsp_reset()\n"));
+
+	outb(3, DSP_RESET); /* Reset FIFO too */
+
+	udelay(10);
+	outb(0, DSP_RESET);
+	udelay(30);
+
+	for (loopc = 0; loopc < 1000 && !(inb(DSP_DATA_AVAIL) & 0x80); loopc++);
+
+	if (inb(DSP_READ) != 0xAA) {
+		DDB(printk("sb: No response to RESET\n"));
+		return 0;   /* Sorry */
+	}
+	ess_extended (devc);
+
+	DEB(printk("sb_dsp_reset() OK\n"));
+
+#ifdef FKS_LOGGING
+printk(KERN_INFO "FKS: dsp_reset 2\n");
+ess_show_mixerregs (devc);
+#endif
+
+	return 1;
+}
+
+static int ess_irq_bits (int irq)
+{
+	switch (irq) {
+	case 2:
+	case 9:
+		return 0;
+
+	case 5:
+		return 1;
+
+	case 7:
+		return 2;
+
+	case 10:
+		return 3;
+
+	default:
+		printk(KERN_ERR "ESS1688: Invalid IRQ %d\n", irq);
+		return -1;
+	}
+}
+
+/*
+ *	Set IRQ configuration register for all ESS models
+ */
+static int ess_common_set_irq_hw (sb_devc * devc)
+{
+	int irq_bits;
+
+	if ((irq_bits = ess_irq_bits (devc->irq)) == -1) return 0;
+
+	if (!ess_write (devc, 0xb1, 0x50 | (irq_bits << 2))) {
+		printk(KERN_ERR "ES1688: Failed to write to IRQ config register\n");
+		return 0;
+	}
+	return 1;
+}
+
+/*
+ * I wanna use modern ES1887 mixer irq handling. Funny is the
+ * fact that my BIOS wants the same. But suppose someone's BIOS
+ * doesn't do this!
+ * This is independent of duplex. If there's a 1887 this will
+ * prevent it from going into 1888 mode.
+ */
+static void ess_es1887_set_irq_hw (sb_devc * devc)
+{
+	int irq_bits;
+
+	if ((irq_bits = ess_irq_bits (devc->irq)) == -1) return;
+
+	ess_chgmixer (devc, 0x7f, 0x0f, 0x01 | ((irq_bits + 1) << 1));
+}
+
+static int ess_set_irq_hw (sb_devc * devc)
+{
+	if (devc->submodel == SUBMDL_ES1887) ess_es1887_set_irq_hw (devc);
+
+	return ess_common_set_irq_hw (devc);
+}
+
+#ifdef FKS_TEST
+
+/*
+ * FKS_test:
+ *	for ES1887: 00, 18, non wr bits: 0001 1000
+ *	for ES1868: 00, b8, non wr bits: 1011 1000
+ *	for ES1888: 00, f8, non wr bits: 1111 1000
+ *	for ES1688: 00, f8, non wr bits: 1111 1000
+ *	+   ES968
+ */
+
+static void FKS_test (sb_devc * devc)
+{
+	int val1, val2;
+	val1 = ess_getmixer (devc, 0x64);
+	ess_setmixer (devc, 0x64, ~val1);
+	val2 = ess_getmixer (devc, 0x64) ^ ~val1;
+	ess_setmixer (devc, 0x64, val1);
+	val1 ^= ess_getmixer (devc, 0x64);
+printk (KERN_INFO "FKS: FKS_test %02x, %02x\n", (val1 & 0x0ff), (val2 & 0x0ff));
+};
+#endif
+
+static unsigned int ess_identify (sb_devc * devc)
+{
+	unsigned int val;
+	unsigned long flags;
+
+	spin_lock_irqsave(&devc->lock, flags);
+	outb(((unsigned char) (0x40 & 0xff)), MIXER_ADDR);
+
+	udelay(20);
+	val  = inb(MIXER_DATA) << 8;
+	udelay(20);
+	val |= inb(MIXER_DATA);
+	udelay(20);
+	spin_unlock_irqrestore(&devc->lock, flags);
+
+	return val;
+}
+
+/*
+ * ESS technology describes a detection scheme in their docs. It involves
+ * fiddling with the bits in certain mixer registers. ess_probe is supposed
+ * to help.
+ *
+ * FKS: tracing shows ess_probe writes wrong value to 0x64. Bit 3 reads 1, but
+ * should be written 0 only. Check this.
+ */
+static int ess_probe (sb_devc * devc, int reg, int xorval)
+{
+	int  val1, val2, val3;
+
+	val1 = ess_getmixer (devc, reg);
+	val2 = val1 ^ xorval;
+	ess_setmixer (devc, reg, val2);
+	val3 = ess_getmixer (devc, reg);
+	ess_setmixer (devc, reg, val1);
+
+	return (val2 == val3);
+}
+
+int ess_init(sb_devc * devc, struct address_info *hw_config)
+{
+	unsigned char cfg;
+	int ess_major = 0, ess_minor = 0;
+	int i;
+	static char name[100], modelname[10];
+
+	/*
+	 * Try to detect ESS chips.
+	 */
+
+	sb_dsp_command(devc, 0xe7); /* Return identification */
+
+	for (i = 1000; i; i--) {
+		if (inb(DSP_DATA_AVAIL) & 0x80) {
+			if (ess_major == 0) {
+				ess_major = inb(DSP_READ);
+			} else {
+				ess_minor = inb(DSP_READ);
+				break;
+			}
+		}
+	}
+
+	if (ess_major == 0) return 0;
+
+	if (ess_major == 0x48 && (ess_minor & 0xf0) == 0x80) {
+		sprintf(name, "ESS ES488 AudioDrive (rev %d)",
+			ess_minor & 0x0f);
+		hw_config->name = name;
+		devc->model = MDL_SBPRO;
+		return 1;
+	}
+
+	/*
+	 * This the detection heuristic of ESS technology, though somewhat
+	 * changed to actually make it work.
+	 * This results in the following detection steps:
+	 * - distinct between ES688 and ES1688+ (as always done in this driver)
+	 *   if ES688 we're ready
+	 * - try to detect ES1868, ES1869 or ES1878 (ess_identify)
+	 *   if successful we're ready
+	 * - try to detect ES1888, ES1887 or ES1788 (aim: detect ES1887)
+	 *   if successful we're ready
+	 * - Dunno. Must be 1688. Will do in general
+	 *
+	 * This is the most BETA part of the software: Will the detection
+	 * always work?
+	 */
+	devc->model = MDL_ESS;
+	devc->submodel = ess_minor & 0x0f;
+
+	if (ess_major == 0x68 && (ess_minor & 0xf0) == 0x80) {
+		char *chip = NULL;
+		int submodel = -1;
+
+		switch (devc->sbmo.esstype) {
+		case ESSTYPE_DETECT:
+		case ESSTYPE_LIKE20:
+			break;
+		case 688:
+			submodel = 0x00;
+			break;
+		case 1688:
+			submodel = 0x08;
+			break;
+		case 1868:
+			submodel = SUBMDL_ES1868;
+			break;
+		case 1869:
+			submodel = SUBMDL_ES1869;
+			break;
+		case 1788:
+			submodel = SUBMDL_ES1788;
+			break;
+		case 1878:
+			submodel = SUBMDL_ES1878;
+			break;
+		case 1879:
+			submodel = SUBMDL_ES1879;
+			break;
+		case 1887:
+			submodel = SUBMDL_ES1887;
+			break;
+		case 1888:
+			submodel = SUBMDL_ES1888;
+			break;
+		default:
+			printk (KERN_ERR "Invalid esstype=%d specified\n", devc->sbmo.esstype);
+			return 0;
+		};
+		if (submodel != -1) {
+			devc->submodel = submodel;
+			sprintf (modelname, "ES%d", devc->sbmo.esstype);
+			chip = modelname;
+		};
+		if (chip == NULL && (ess_minor & 0x0f) < 8) {
+			chip = "ES688";
+		};
+#ifdef FKS_TEST
+FKS_test (devc);
+#endif
+		/*
+		 * If Nothing detected yet, and we want 2.0 behaviour...
+		 * Then let's assume it's ES1688.
+		 */
+		if (chip == NULL && devc->sbmo.esstype == ESSTYPE_LIKE20) {
+			chip = "ES1688";
+		};
+
+		if (chip == NULL) {
+			int type;
+
+			type = ess_identify (devc);
+
+			switch (type) {
+			case 0x1868:
+				chip = "ES1868";
+				devc->submodel = SUBMDL_ES1868;
+				break;
+			case 0x1869:
+				chip = "ES1869";
+				devc->submodel = SUBMDL_ES1869;
+				break;
+			case 0x1878:
+				chip = "ES1878";
+				devc->submodel = SUBMDL_ES1878;
+				break;
+			case 0x1879:
+				chip = "ES1879";
+				devc->submodel = SUBMDL_ES1879;
+				break;
+			default:
+				if ((type & 0x00ff) != ((type >> 8) & 0x00ff)) {
+					printk ("ess_init: Unrecognized %04x\n", type);
+				}
+			};
+		};
+#if 0
+		/*
+		 * this one failed:
+		 * the probing of bit 4 is another thought: from ES1788 and up, all
+		 * chips seem to have hardware volume control. Bit 4 is readonly to
+		 * check if a hardware volume interrupt has fired.
+		 * Cause ES688/ES1688 don't have this feature, bit 4 might be writeable
+		 * for these chips.
+		 */
+		if (chip == NULL && !ess_probe(devc, 0x64, (1 << 4))) {
+#endif
+		/*
+		 * the probing of bit 2 is my idea. The ES1887 docs want me to probe
+		 * bit 3. This results in ES1688 being detected as ES1788.
+		 * Bit 2 is for "Enable HWV IRQE", but as ES(1)688 chips don't have
+		 * HardWare Volume, I think they don't have this IRQE.
+		 */
+		if (chip == NULL && ess_probe(devc, 0x64, (1 << 2))) {
+			if (ess_probe (devc, 0x70, 0x7f)) {
+				if (ess_probe (devc, 0x64, (1 << 5))) {
+					chip = "ES1887";
+					devc->submodel = SUBMDL_ES1887;
+				} else {
+					chip = "ES1888";
+					devc->submodel = SUBMDL_ES1888;
+				}
+			} else {
+				chip = "ES1788";
+				devc->submodel = SUBMDL_ES1788;
+			}
+		};
+		if (chip == NULL) {
+			chip = "ES1688";
+		};
+
+	    printk ( KERN_INFO "ESS chip %s %s%s\n"
+               , chip
+               , ( devc->sbmo.esstype == ESSTYPE_DETECT || devc->sbmo.esstype == ESSTYPE_LIKE20
+                 ? "detected"
+                 : "specified"
+                 )
+               , ( devc->sbmo.esstype == ESSTYPE_LIKE20
+                 ? " (kernel 2.0 compatible)"
+                 : ""
+                 )
+               );
+
+		sprintf(name,"ESS %s AudioDrive (rev %d)", chip, ess_minor & 0x0f);
+	} else {
+		strcpy(name, "Jazz16");
+	}
+
+	/* AAS: info stolen from ALSA: these boards have different clocks */
+	switch(devc->submodel) {
+/* APPARENTLY NOT 1869 AND 1887
+		case SUBMDL_ES1869:
+		case SUBMDL_ES1887:
+*/		
+		case SUBMDL_ES1888:
+			devc->caps |= SB_CAP_ES18XX_RATE;
+			break;
+	}
+
+	hw_config->name = name;
+	/* FKS: sb_dsp_reset to enable extended mode???? */
+	sb_dsp_reset(devc); /* Turn on extended mode */
+
+	/*
+	 *  Enable joystick and OPL3
+	 */
+	cfg = ess_getmixer (devc, 0x40);
+	ess_setmixer (devc, 0x40, cfg | 0x03);
+	if (devc->submodel >= 8) {		/* ES1688 */
+		devc->caps |= SB_NO_MIDI;   /* ES1688 uses MPU401 MIDI mode */
+	}
+	sb_dsp_reset (devc);
+
+	/*
+	 * This is important! If it's not done, the IRQ probe in sb_dsp_init
+	 * may fail.
+	 */
+	return ess_set_irq_hw (devc);
+}
+
+static int ess_set_dma_hw(sb_devc * devc)
+{
+	unsigned char cfg, dma_bits = 0, dma16_bits;
+	int dma;
+
+#ifdef FKS_LOGGING
+printk(KERN_INFO "ess_set_dma_hw: dma8=%d,dma16=%d,dup=%d\n"
+, devc->dma8, devc->dma16, devc->duplex);
+#endif
+
+	/*
+	 * FKS: It seems as if this duplex flag isn't set yet. Check it.
+	 */
+	dma = devc->dma8;
+
+	if (dma > 3 || dma < 0 || dma == 2) {
+		dma_bits = 0;
+		printk(KERN_ERR "ESS1688: Invalid DMA8 %d\n", dma);
+		return 0;
+	} else {
+		/* Extended mode DMA enable */
+		cfg = 0x50;
+
+		if (dma == 3) {
+			dma_bits = 3;
+		} else {
+			dma_bits = dma + 1;
+		}
+	}
+
+	if (!ess_write (devc, 0xb2, cfg | (dma_bits << 2))) {
+		printk(KERN_ERR "ESS1688: Failed to write to DMA config register\n");
+		return 0;
+	}
+
+	if (devc->duplex) {
+		dma = devc->dma16;
+		dma16_bits = 0;
+
+		if (dma >= 0) {
+			switch (dma) {
+			case 0:
+				dma_bits = 0x04;
+				break;
+			case 1:
+				dma_bits = 0x05;
+				break;
+			case 3:
+				dma_bits = 0x06;
+				break;
+			case 5:
+				dma_bits   = 0x07;
+				dma16_bits = 0x20;
+				break;
+			default:
+				printk(KERN_ERR "ESS1887: Invalid DMA16 %d\n", dma);
+				return 0;
+			};
+			ess_chgmixer (devc, 0x78, 0x20, dma16_bits);
+			ess_chgmixer (devc, 0x7d, 0x07, dma_bits);
+		}
+	}
+	return 1;
+}
+
+/*
+ * This one is called from sb_dsp_init.
+ *
+ * Return values:
+ *  0: Failed
+ *  1: Succeeded or doesn't apply (not SUBMDL_ES1887)
+ */
+int ess_dsp_init (sb_devc *devc, struct address_info *hw_config)
+{
+	/*
+	 * Caller also checks this, but anyway
+	 */
+	if (devc->model != MDL_ESS) {
+		printk (KERN_INFO "ess_dsp_init for non ESS chip\n");
+		return 1;
+	}
+	/*
+	 * This for ES1887 to run Full Duplex. Actually ES1888
+	 * is allowed to do so too. I have no idea yet if this
+	 * will work for ES1888 however.
+	 *
+	 * For SB16 having both dma8 and dma16 means enable
+	 * Full Duplex. Let's try this for ES1887 too
+	 *
+	 */
+	if (devc->submodel == SUBMDL_ES1887) {
+		if (hw_config->dma2 != -1) {
+			devc->dma16 = hw_config->dma2;
+		}
+		/*
+		 * devc->duplex initialization is put here, cause
+		 * ess_set_dma_hw needs it.
+		 */
+		if (devc->dma8 != devc->dma16 && devc->dma16 != -1) {
+			devc->duplex = 1;
+		}
+	}
+	if (!ess_set_dma_hw (devc)) {
+		free_irq(devc->irq, devc);
+		return 0;
+	}
+	return 1;
+}
+
+/****************************************************************************
+ *																			*
+ *									ESS mixer								*
+ *																			*
+ ****************************************************************************/
+
+#define ES688_RECORDING_DEVICES	\
+			( SOUND_MASK_LINE	| SOUND_MASK_MIC	| SOUND_MASK_CD		)
+#define ES688_MIXER_DEVICES		\
+			( SOUND_MASK_SYNTH	| SOUND_MASK_PCM	| SOUND_MASK_LINE	\
+			| SOUND_MASK_MIC	| SOUND_MASK_CD		| SOUND_MASK_VOLUME	\
+			| SOUND_MASK_LINE2	| SOUND_MASK_SPEAKER					)
+
+#define ES1688_RECORDING_DEVICES	\
+			( ES688_RECORDING_DEVICES					)
+#define ES1688_MIXER_DEVICES		\
+			( ES688_MIXER_DEVICES | SOUND_MASK_RECLEV	)
+
+#define ES1887_RECORDING_DEVICES	\
+			( ES1688_RECORDING_DEVICES | SOUND_MASK_LINE2 | SOUND_MASK_SYNTH)
+#define ES1887_MIXER_DEVICES		\
+			( ES1688_MIXER_DEVICES											)
+
+/*
+ * Mixer registers of ES1887
+ *
+ * These registers specifically take care of recording levels. To make the
+ * mapping from playback devices to recording devices every recording
+ * devices = playback device + ES_REC_MIXER_RECDIFF
+ */
+#define ES_REC_MIXER_RECBASE	(SOUND_MIXER_LINE3 + 1)
+#define ES_REC_MIXER_RECDIFF	(ES_REC_MIXER_RECBASE - SOUND_MIXER_SYNTH)
+
+#define ES_REC_MIXER_RECSYNTH	(SOUND_MIXER_SYNTH	 + ES_REC_MIXER_RECDIFF)
+#define ES_REC_MIXER_RECPCM		(SOUND_MIXER_PCM	 + ES_REC_MIXER_RECDIFF)
+#define ES_REC_MIXER_RECSPEAKER	(SOUND_MIXER_SPEAKER + ES_REC_MIXER_RECDIFF)
+#define ES_REC_MIXER_RECLINE	(SOUND_MIXER_LINE	 + ES_REC_MIXER_RECDIFF)
+#define ES_REC_MIXER_RECMIC		(SOUND_MIXER_MIC	 + ES_REC_MIXER_RECDIFF)
+#define ES_REC_MIXER_RECCD		(SOUND_MIXER_CD		 + ES_REC_MIXER_RECDIFF)
+#define ES_REC_MIXER_RECIMIX	(SOUND_MIXER_IMIX	 + ES_REC_MIXER_RECDIFF)
+#define ES_REC_MIXER_RECALTPCM	(SOUND_MIXER_ALTPCM	 + ES_REC_MIXER_RECDIFF)
+#define ES_REC_MIXER_RECRECLEV	(SOUND_MIXER_RECLEV	 + ES_REC_MIXER_RECDIFF)
+#define ES_REC_MIXER_RECIGAIN	(SOUND_MIXER_IGAIN	 + ES_REC_MIXER_RECDIFF)
+#define ES_REC_MIXER_RECOGAIN	(SOUND_MIXER_OGAIN	 + ES_REC_MIXER_RECDIFF)
+#define ES_REC_MIXER_RECLINE1	(SOUND_MIXER_LINE1	 + ES_REC_MIXER_RECDIFF)
+#define ES_REC_MIXER_RECLINE2	(SOUND_MIXER_LINE2	 + ES_REC_MIXER_RECDIFF)
+#define ES_REC_MIXER_RECLINE3	(SOUND_MIXER_LINE3	 + ES_REC_MIXER_RECDIFF)
+
+static mixer_tab es688_mix = {
+MIX_ENT(SOUND_MIXER_VOLUME,			0x32, 7, 4, 0x32, 3, 4),
+MIX_ENT(SOUND_MIXER_BASS,			0x00, 0, 0, 0x00, 0, 0),
+MIX_ENT(SOUND_MIXER_TREBLE,			0x00, 0, 0, 0x00, 0, 0),
+MIX_ENT(SOUND_MIXER_SYNTH,			0x36, 7, 4, 0x36, 3, 4),
+MIX_ENT(SOUND_MIXER_PCM,			0x14, 7, 4, 0x14, 3, 4),
+MIX_ENT(SOUND_MIXER_SPEAKER,		0x3c, 2, 3, 0x00, 0, 0),
+MIX_ENT(SOUND_MIXER_LINE,			0x3e, 7, 4, 0x3e, 3, 4),
+MIX_ENT(SOUND_MIXER_MIC,			0x1a, 7, 4, 0x1a, 3, 4),
+MIX_ENT(SOUND_MIXER_CD,				0x38, 7, 4, 0x38, 3, 4),
+MIX_ENT(SOUND_MIXER_IMIX,			0x00, 0, 0, 0x00, 0, 0),
+MIX_ENT(SOUND_MIXER_ALTPCM,			0x00, 0, 0, 0x00, 0, 0),
+MIX_ENT(SOUND_MIXER_RECLEV,			0x00, 0, 0, 0x00, 0, 0),
+MIX_ENT(SOUND_MIXER_IGAIN,			0x00, 0, 0, 0x00, 0, 0),
+MIX_ENT(SOUND_MIXER_OGAIN,			0x00, 0, 0, 0x00, 0, 0),
+MIX_ENT(SOUND_MIXER_LINE1,			0x00, 0, 0, 0x00, 0, 0),
+MIX_ENT(SOUND_MIXER_LINE2,			0x3a, 7, 4, 0x3a, 3, 4),
+MIX_ENT(SOUND_MIXER_LINE3,			0x00, 0, 0, 0x00, 0, 0)
+};
+
+/*
+ * The ES1688 specifics... hopefully correct...
+ * - 6 bit master volume
+ *   I was wrong, ES1888 docs say ES1688 didn't have it.
+ * - RECLEV control
+ * These may apply to ES688 too. I have no idea.
+ */
+static mixer_tab es1688_mix = {
+MIX_ENT(SOUND_MIXER_VOLUME,			0x32, 7, 4, 0x32, 3, 4),
+MIX_ENT(SOUND_MIXER_BASS,			0x00, 0, 0, 0x00, 0, 0),
+MIX_ENT(SOUND_MIXER_TREBLE,			0x00, 0, 0, 0x00, 0, 0),
+MIX_ENT(SOUND_MIXER_SYNTH,			0x36, 7, 4, 0x36, 3, 4),
+MIX_ENT(SOUND_MIXER_PCM,			0x14, 7, 4, 0x14, 3, 4),
+MIX_ENT(SOUND_MIXER_SPEAKER,		0x3c, 2, 3, 0x00, 0, 0),
+MIX_ENT(SOUND_MIXER_LINE,			0x3e, 7, 4, 0x3e, 3, 4),
+MIX_ENT(SOUND_MIXER_MIC,			0x1a, 7, 4, 0x1a, 3, 4),
+MIX_ENT(SOUND_MIXER_CD,				0x38, 7, 4, 0x38, 3, 4),
+MIX_ENT(SOUND_MIXER_IMIX,			0x00, 0, 0, 0x00, 0, 0),
+MIX_ENT(SOUND_MIXER_ALTPCM,			0x00, 0, 0, 0x00, 0, 0),
+MIX_ENT(SOUND_MIXER_RECLEV,			0xb4, 7, 4, 0xb4, 3, 4),
+MIX_ENT(SOUND_MIXER_IGAIN,			0x00, 0, 0, 0x00, 0, 0),
+MIX_ENT(SOUND_MIXER_OGAIN,			0x00, 0, 0, 0x00, 0, 0),
+MIX_ENT(SOUND_MIXER_LINE1,			0x00, 0, 0, 0x00, 0, 0),
+MIX_ENT(SOUND_MIXER_LINE2,			0x3a, 7, 4, 0x3a, 3, 4),
+MIX_ENT(SOUND_MIXER_LINE3,			0x00, 0, 0, 0x00, 0, 0)
+};
+
+static mixer_tab es1688later_mix = {
+MIX_ENT(SOUND_MIXER_VOLUME,			0x60, 5, 6, 0x62, 5, 6),
+MIX_ENT(SOUND_MIXER_BASS,			0x00, 0, 0, 0x00, 0, 0),
+MIX_ENT(SOUND_MIXER_TREBLE,			0x00, 0, 0, 0x00, 0, 0),
+MIX_ENT(SOUND_MIXER_SYNTH,			0x36, 7, 4, 0x36, 3, 4),
+MIX_ENT(SOUND_MIXER_PCM,			0x14, 7, 4, 0x14, 3, 4),
+MIX_ENT(SOUND_MIXER_SPEAKER,		0x3c, 2, 3, 0x00, 0, 0),
+MIX_ENT(SOUND_MIXER_LINE,			0x3e, 7, 4, 0x3e, 3, 4),
+MIX_ENT(SOUND_MIXER_MIC,			0x1a, 7, 4, 0x1a, 3, 4),
+MIX_ENT(SOUND_MIXER_CD,				0x38, 7, 4, 0x38, 3, 4),
+MIX_ENT(SOUND_MIXER_IMIX,			0x00, 0, 0, 0x00, 0, 0),
+MIX_ENT(SOUND_MIXER_ALTPCM,			0x00, 0, 0, 0x00, 0, 0),
+MIX_ENT(SOUND_MIXER_RECLEV,			0xb4, 7, 4, 0xb4, 3, 4),
+MIX_ENT(SOUND_MIXER_IGAIN,			0x00, 0, 0, 0x00, 0, 0),
+MIX_ENT(SOUND_MIXER_OGAIN,			0x00, 0, 0, 0x00, 0, 0),
+MIX_ENT(SOUND_MIXER_LINE1,			0x00, 0, 0, 0x00, 0, 0),
+MIX_ENT(SOUND_MIXER_LINE2,			0x3a, 7, 4, 0x3a, 3, 4),
+MIX_ENT(SOUND_MIXER_LINE3,			0x00, 0, 0, 0x00, 0, 0)
+};
+
+/*
+ * This one is for all ESS chips with a record mixer.
+ * It's not used (yet) however
+ */
+static mixer_tab es_rec_mix = {
+MIX_ENT(SOUND_MIXER_VOLUME,			0x60, 5, 6, 0x62, 5, 6),
+MIX_ENT(SOUND_MIXER_BASS,			0x00, 0, 0, 0x00, 0, 0),
+MIX_ENT(SOUND_MIXER_TREBLE,			0x00, 0, 0, 0x00, 0, 0),
+MIX_ENT(SOUND_MIXER_SYNTH,			0x36, 7, 4, 0x36, 3, 4),
+MIX_ENT(SOUND_MIXER_PCM,			0x14, 7, 4, 0x14, 3, 4),
+MIX_ENT(SOUND_MIXER_SPEAKER,		0x3c, 2, 3, 0x00, 0, 0),
+MIX_ENT(SOUND_MIXER_LINE,			0x3e, 7, 4, 0x3e, 3, 4),
+MIX_ENT(SOUND_MIXER_MIC,			0x1a, 7, 4, 0x1a, 3, 4),
+MIX_ENT(SOUND_MIXER_CD,				0x38, 7, 4, 0x38, 3, 4),
+MIX_ENT(SOUND_MIXER_IMIX,			0x00, 0, 0, 0x00, 0, 0),
+MIX_ENT(SOUND_MIXER_ALTPCM,			0x00, 0, 0, 0x00, 0, 0),
+MIX_ENT(SOUND_MIXER_RECLEV,			0xb4, 7, 4, 0xb4, 3, 4),
+MIX_ENT(SOUND_MIXER_IGAIN,			0x00, 0, 0, 0x00, 0, 0),
+MIX_ENT(SOUND_MIXER_OGAIN,			0x00, 0, 0, 0x00, 0, 0),
+MIX_ENT(SOUND_MIXER_LINE1,			0x00, 0, 0, 0x00, 0, 0),
+MIX_ENT(SOUND_MIXER_LINE2,			0x3a, 7, 4, 0x3a, 3, 4),
+MIX_ENT(SOUND_MIXER_LINE3,			0x00, 0, 0, 0x00, 0, 0),
+MIX_ENT(ES_REC_MIXER_RECSYNTH,		0x6b, 7, 4, 0x6b, 3, 4),
+MIX_ENT(ES_REC_MIXER_RECPCM,		0x00, 0, 0, 0x00, 0, 0),
+MIX_ENT(ES_REC_MIXER_RECSPEAKER,	0x00, 0, 0, 0x00, 0, 0),
+MIX_ENT(ES_REC_MIXER_RECLINE,		0x6e, 7, 4, 0x6e, 3, 4),
+MIX_ENT(ES_REC_MIXER_RECMIC,		0x68, 7, 4, 0x68, 3, 4),
+MIX_ENT(ES_REC_MIXER_RECCD,			0x6a, 7, 4, 0x6a, 3, 4),
+MIX_ENT(ES_REC_MIXER_RECIMIX,		0x00, 0, 0, 0x00, 0, 0),
+MIX_ENT(ES_REC_MIXER_RECALTPCM,		0x00, 0, 0, 0x00, 0, 0),
+MIX_ENT(ES_REC_MIXER_RECRECLEV,		0x00, 0, 0, 0x00, 0, 0),
+MIX_ENT(ES_REC_MIXER_RECIGAIN,		0x00, 0, 0, 0x00, 0, 0),
+MIX_ENT(ES_REC_MIXER_RECOGAIN,		0x00, 0, 0, 0x00, 0, 0),
+MIX_ENT(ES_REC_MIXER_RECLINE1,		0x00, 0, 0, 0x00, 0, 0),
+MIX_ENT(ES_REC_MIXER_RECLINE2,		0x6c, 7, 4, 0x6c, 3, 4),
+MIX_ENT(ES_REC_MIXER_RECLINE3,		0x00, 0, 0, 0x00, 0, 0)
+};
+
+/*
+ * This one is for ES1887. It's little different from es_rec_mix: it
+ * has 0x7c for PCM playback level. This is because ES1887 uses
+ * Audio 2 for playback.
+ */
+static mixer_tab es1887_mix = {
+MIX_ENT(SOUND_MIXER_VOLUME,			0x60, 5, 6, 0x62, 5, 6),
+MIX_ENT(SOUND_MIXER_BASS,			0x00, 0, 0, 0x00, 0, 0),
+MIX_ENT(SOUND_MIXER_TREBLE,			0x00, 0, 0, 0x00, 0, 0),
+MIX_ENT(SOUND_MIXER_SYNTH,			0x36, 7, 4, 0x36, 3, 4),
+MIX_ENT(SOUND_MIXER_PCM,			0x7c, 7, 4, 0x7c, 3, 4),
+MIX_ENT(SOUND_MIXER_SPEAKER,		0x3c, 2, 3, 0x00, 0, 0),
+MIX_ENT(SOUND_MIXER_LINE,			0x3e, 7, 4, 0x3e, 3, 4),
+MIX_ENT(SOUND_MIXER_MIC,			0x1a, 7, 4, 0x1a, 3, 4),
+MIX_ENT(SOUND_MIXER_CD,				0x38, 7, 4, 0x38, 3, 4),
+MIX_ENT(SOUND_MIXER_IMIX,			0x00, 0, 0, 0x00, 0, 0),
+MIX_ENT(SOUND_MIXER_ALTPCM,			0x00, 0, 0, 0x00, 0, 0),
+MIX_ENT(SOUND_MIXER_RECLEV,			0xb4, 7, 4, 0xb4, 3, 4),
+MIX_ENT(SOUND_MIXER_IGAIN,			0x00, 0, 0, 0x00, 0, 0),
+MIX_ENT(SOUND_MIXER_OGAIN,			0x00, 0, 0, 0x00, 0, 0),
+MIX_ENT(SOUND_MIXER_LINE1,			0x00, 0, 0, 0x00, 0, 0),
+MIX_ENT(SOUND_MIXER_LINE2,			0x3a, 7, 4, 0x3a, 3, 4),
+MIX_ENT(SOUND_MIXER_LINE3,			0x00, 0, 0, 0x00, 0, 0),
+MIX_ENT(ES_REC_MIXER_RECSYNTH,		0x6b, 7, 4, 0x6b, 3, 4),
+MIX_ENT(ES_REC_MIXER_RECPCM,		0x00, 0, 0, 0x00, 0, 0),
+MIX_ENT(ES_REC_MIXER_RECSPEAKER,	0x00, 0, 0, 0x00, 0, 0),
+MIX_ENT(ES_REC_MIXER_RECLINE,		0x6e, 7, 4, 0x6e, 3, 4),
+MIX_ENT(ES_REC_MIXER_RECMIC,		0x68, 7, 4, 0x68, 3, 4),
+MIX_ENT(ES_REC_MIXER_RECCD,			0x6a, 7, 4, 0x6a, 3, 4),
+MIX_ENT(ES_REC_MIXER_RECIMIX,		0x00, 0, 0, 0x00, 0, 0),
+MIX_ENT(ES_REC_MIXER_RECALTPCM,		0x00, 0, 0, 0x00, 0, 0),
+MIX_ENT(ES_REC_MIXER_RECRECLEV,		0x00, 0, 0, 0x00, 0, 0),
+MIX_ENT(ES_REC_MIXER_RECIGAIN,		0x00, 0, 0, 0x00, 0, 0),
+MIX_ENT(ES_REC_MIXER_RECOGAIN,		0x00, 0, 0, 0x00, 0, 0),
+MIX_ENT(ES_REC_MIXER_RECLINE1,		0x00, 0, 0, 0x00, 0, 0),
+MIX_ENT(ES_REC_MIXER_RECLINE2,		0x6c, 7, 4, 0x6c, 3, 4),
+MIX_ENT(ES_REC_MIXER_RECLINE3,		0x00, 0, 0, 0x00, 0, 0)
+};
+
+static int ess_has_rec_mixer (int submodel)
+{
+	switch (submodel) {
+	case SUBMDL_ES1887:
+		return 1;
+	default:
+		return 0;
+	};
+};
+
+#ifdef FKS_LOGGING
+static int ess_mixer_mon_regs[]
+	= { 0x70, 0x71, 0x72, 0x74, 0x76, 0x78, 0x7a, 0x7c, 0x7d, 0x7f
+	  , 0xa1, 0xa2, 0xa4, 0xa5, 0xa8, 0xa9
+	  , 0xb1, 0xb2, 0xb4, 0xb5, 0xb6, 0xb7, 0xb9
+	  , 0x00};
+
+static void ess_show_mixerregs (sb_devc *devc)
+{
+	int *mp = ess_mixer_mon_regs;
+
+return;
+
+	while (*mp != 0) {
+		printk (KERN_INFO "res (%x)=%x\n", *mp, (int)(ess_getmixer (devc, *mp)));
+		mp++;
+	}
+}
+#endif
+
+void ess_setmixer (sb_devc * devc, unsigned int port, unsigned int value)
+{
+	unsigned long flags;
+
+#ifdef FKS_LOGGING
+printk(KERN_INFO "FKS: write mixer %x: %x\n", port, value);
+#endif
+
+	spin_lock_irqsave(&devc->lock, flags);
+	if (port >= 0xa0) {
+		ess_write (devc, port, value);
+	} else {
+		outb(((unsigned char) (port & 0xff)), MIXER_ADDR);
+
+		udelay(20);
+		outb(((unsigned char) (value & 0xff)), MIXER_DATA);
+		udelay(20);
+	};
+	spin_unlock_irqrestore(&devc->lock, flags);
+}
+
+unsigned int ess_getmixer (sb_devc * devc, unsigned int port)
+{
+	unsigned int val;
+	unsigned long flags;
+
+	spin_lock_irqsave(&devc->lock, flags);
+
+	if (port >= 0xa0) {
+		val = ess_read (devc, port);
+	} else {
+		outb(((unsigned char) (port & 0xff)), MIXER_ADDR);
+
+		udelay(20);
+		val = inb(MIXER_DATA);
+		udelay(20);
+	}
+	spin_unlock_irqrestore(&devc->lock, flags);
+
+	return val;
+}
+
+static void ess_chgmixer
+	(sb_devc * devc, unsigned int reg, unsigned int mask, unsigned int val)
+{
+	int value;
+
+	value = ess_getmixer (devc, reg);
+	value = (value & ~mask) | (val & mask);
+	ess_setmixer (devc, reg, value);
+}
+
+/*
+ * ess_mixer_init must be called from sb_mixer_init
+ */
+void ess_mixer_init (sb_devc * devc)
+{
+	devc->mixer_caps = SOUND_CAP_EXCL_INPUT;
+
+	/*
+	* Take care of ES1887 specifics...
+	*/
+	switch (devc->submodel) {
+	case SUBMDL_ES1887:
+		devc->supported_devices		= ES1887_MIXER_DEVICES;
+		devc->supported_rec_devices	= ES1887_RECORDING_DEVICES;
+#ifdef FKS_LOGGING
+printk (KERN_INFO "FKS: ess_mixer_init dup = %d\n", devc->duplex);
+#endif
+		if (devc->duplex) {
+			devc->iomap				= &es1887_mix;
+			devc->iomap_sz                          = ARRAY_SIZE(es1887_mix);
+		} else {
+			devc->iomap				= &es_rec_mix;
+			devc->iomap_sz                          = ARRAY_SIZE(es_rec_mix);
+		}
+		break;
+	default:
+		if (devc->submodel < 8) {
+			devc->supported_devices		= ES688_MIXER_DEVICES;
+			devc->supported_rec_devices	= ES688_RECORDING_DEVICES;
+			devc->iomap					= &es688_mix;
+			devc->iomap_sz                                  = ARRAY_SIZE(es688_mix);
+		} else {
+			/*
+			 * es1688 has 4 bits master vol.
+			 * later chips have 6 bits (?)
+			 */
+			devc->supported_devices		= ES1688_MIXER_DEVICES;
+			devc->supported_rec_devices	= ES1688_RECORDING_DEVICES;
+			if (devc->submodel < 0x10) {
+				devc->iomap				= &es1688_mix;
+				devc->iomap_sz                          = ARRAY_SIZE(es688_mix);
+			} else {
+				devc->iomap				= &es1688later_mix;
+				devc->iomap_sz                          = ARRAY_SIZE(es1688later_mix);
+			}
+		}
+	}
+}
+
+/*
+ * Changing playback levels at an ESS chip with record mixer means having to
+ * take care of recording levels of recorded inputs (devc->recmask) too!
+ */
+int ess_mixer_set(sb_devc *devc, int dev, int left, int right)
+{
+	if (ess_has_rec_mixer (devc->submodel) && (devc->recmask & (1 << dev))) {
+		sb_common_mixer_set (devc, dev + ES_REC_MIXER_RECDIFF, left, right);
+	}
+	return sb_common_mixer_set (devc, dev, left, right);
+}
+
+/*
+ * After a sb_dsp_reset extended register 0xb4 (RECLEV) is reset too. After
+ * sb_dsp_reset RECLEV has to be restored. This is where ess_mixer_reload
+ * helps.
+ */
+void ess_mixer_reload (sb_devc *devc, int dev)
+{
+	int left, right, value;
+
+	value = devc->levels[dev];
+	left  = value & 0x000000ff;
+	right = (value & 0x0000ff00) >> 8;
+
+	sb_common_mixer_set(devc, dev, left, right);
+}
+
+static int es_rec_set_recmask(sb_devc * devc, int mask)
+{
+	int i, i_mask, cur_mask, diff_mask;
+	int value, left, right;
+
+#ifdef FKS_LOGGING
+printk (KERN_INFO "FKS: es_rec_set_recmask mask = %x\n", mask);
+#endif
+	/*
+	 * Changing the recmask on an ESS chip with recording mixer means:
+	 * (1) Find the differences
+	 * (2) For "turned-on"  inputs: make the recording level the playback level
+	 * (3) For "turned-off" inputs: make the recording level zero
+	 */
+	cur_mask  = devc->recmask;
+	diff_mask = (cur_mask ^ mask);
+
+	for (i = 0; i < 32; i++) {
+		i_mask = (1 << i);
+		if (diff_mask & i_mask) {	/* Difference? (1)  */
+			if (mask & i_mask) {	/* Turn it on  (2)  */
+				value = devc->levels[i];
+				left  = value & 0x000000ff;
+				right = (value & 0x0000ff00) >> 8;
+			} else {				/* Turn it off (3)  */
+				left  = 0;
+				left  = 0;
+				right = 0;
+			}
+			sb_common_mixer_set(devc, i + ES_REC_MIXER_RECDIFF, left, right);
+		}
+	}
+	return mask;
+}
+
+int ess_set_recmask(sb_devc * devc, int *mask)
+{
+	/* This applies to ESS chips with record mixers only! */
+
+	if (ess_has_rec_mixer (devc->submodel)) {
+		*mask	= es_rec_set_recmask (devc, *mask);
+		return 1;									/* Applied		*/
+	} else {
+		return 0;									/* Not applied	*/
+	}
+}
+
+/*
+ * ess_mixer_reset must be called from sb_mixer_reset
+ */
+int ess_mixer_reset (sb_devc * devc)
+{
+	/*
+	 * Separate actions for ESS chips with a record mixer:
+	 */
+	if (ess_has_rec_mixer (devc->submodel)) {
+		switch (devc->submodel) {
+		case SUBMDL_ES1887:
+			/*
+			 * Separate actions for ES1887:
+			 * Change registers 7a and 1c to make the record mixer the
+			 * actual recording source.
+			 */
+			ess_chgmixer(devc, 0x7a, 0x18, 0x08);
+			ess_chgmixer(devc, 0x1c, 0x07, 0x07);
+			break;
+		};
+		/*
+		 * Call set_recmask for proper initialization
+		 */
+		devc->recmask = devc->supported_rec_devices;
+		es_rec_set_recmask(devc, 0);
+		devc->recmask = 0;
+
+		return 1;	/* We took care of recmask.				*/
+	} else {
+		return 0;	/* We didn't take care; caller do it	*/
+	}
+}
+
+/****************************************************************************
+ *																			*
+ *								ESS midi									*
+ *																			*
+ ****************************************************************************/
+
+/*
+ * FKS: IRQ may be shared. Hm. And if so? Then What?
+ */
+int ess_midi_init(sb_devc * devc, struct address_info *hw_config)
+{
+	unsigned char   cfg, tmp;
+
+	cfg = ess_getmixer (devc, 0x40) & 0x03;
+
+	if (devc->submodel < 8) {
+		ess_setmixer (devc, 0x40, cfg | 0x03);	/* Enable OPL3 & joystick */
+		return 0;  					 /* ES688 doesn't support MPU401 mode */
+	}
+	tmp = (hw_config->io_base & 0x0f0) >> 4;
+
+	if (tmp > 3) {
+		ess_setmixer (devc, 0x40, cfg);
+		return 0;
+	}
+	cfg |= tmp << 3;
+
+	tmp = 1;		/* MPU enabled without interrupts */
+
+	/* May be shared: if so the value is -ve */
+
+	switch (abs(hw_config->irq)) {
+		case 9:
+			tmp = 0x4;
+			break;
+		case 5:
+			tmp = 0x5;
+			break;
+		case 7:
+			tmp = 0x6;
+			break;
+		case 10:
+			tmp = 0x7;
+			break;
+		default:
+			return 0;
+	}
+
+	cfg |= tmp << 5;
+	ess_setmixer (devc, 0x40, cfg | 0x03);
+
+	return 1;
+}
+