Envy24HT

Envy24HT

[James Stafford]

Has anyone started work on a driver for the VIA VT1724 (alias Envy24HT)?

The company I work for are planning to release a PC104+ card based on this
chipset (paired with the VT1616) in the very near future so I have access 
to one
of the evaluation kits from VIA.

If noone else is working on a driver, I may be able to persuade my boss to 
allow
me to work on it. However, my knowledge of the architecture of this chip 
and audio
hardware in general is currently quite limited.



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Re: Envy24HT

[Jaroslav Kysela]

On Sun, 24 Nov 2002, James Stafford wrote:

> Has anyone started work on a driver for the VIA VT1724 (alias Envy24HT)?
> 
> The company I work for are planning to release a PC104+ card based on
> this chipset (paired with the VT1616) in the very near future so I have
> access to one of the evaluation kits from VIA.
> 
> If noone else is working on a driver, I may be able to persuade my boss
> to allow me to work on it. However, my knowledge of the architecture of
> this chip and audio hardware in general is currently quite limited.

It's possible to add the support to the ICE1712 driver for this new chip,
but it's difficult without hardware.

						Jaroslav

-----
Jaroslav Kysela <perex@suse.cz>
Linux Kernel Sound Maintainer
ALSA Project, SuSE Labs



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Re: Envy24HT

[James Stafford]

At 12:06 25/11/02, you wrote:
>On Sun, 24 Nov 2002, James Stafford wrote:
>
> > Has anyone started work on a driver for the VIA VT1724 (alias Envy24HT)?
> >
> > The company I work for are planning to release a PC104+ card based on
> > this chipset (paired with the VT1616) in the very near future so I have
> > access to one of the evaluation kits from VIA.
> >
> > If noone else is working on a driver, I may be able to persuade my boss
> > to allow me to work on it. However, my knowledge of the architecture of
> > this chip and audio hardware in general is currently quite limited.
>
>It's possible to add the support to the ICE1712 driver for this new chip,
>but it's difficult without hardware.

I have now modified the ICE1712 driver downloaded from the CVS on 26th 
November to add basic support for the Envy24HT.
I will tidy the code up and hopefully send a patch by the weekend.



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[PATCH] Envy24HT

[James Stafford]

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Attached are two patches that add basic Envy24HT support to the ICE1712
driver and VT1616 to the AC97 codec driver. They were made against the cvs
from today.

Issues:
Quote from VT1616 data sheet: "The VT1616 powers up with pins 39 and 41
assigned to the Front channel DACs as described in the 2.2 specification.
When this bit is to “0”, the output pins get assigned to the Rear stereo
DAC pair with an independent volume control." 
The reference design uses pins 39 and 41 for the left and right rear
outputs. I have added a control to set this bit to 0 but the default is 1.
Should a patch function be used to set the default to 0?

When using applications such as MPlayer and ac3dec, the centre/lfe and rear
outputs are swapped so that the data for the rear comes out of centre/lfe
and vice versa. Is there something I have missed here?

Todo:
Capture has not been tested
Add support for rates of 176.4 KHz and 192KHz 
Add support for internal S/PDIF transmitter and MPU-401
Fix the Fifo error interrupt handling. 
Possibly add support for Envy24HT specific options to the envy24control
program

[-- Attachment #2: envy24ht-001b.diff.gz --]
[-- Type: application/octet-stream, Size: 3461 bytes --]

[-- Attachment #3: envy24ht-001a.diff.gz --]
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Re: [PATCH] Envy24HT

[Jaroslav Kysela]

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[-- Attachment #1: Type: TEXT/PLAIN; charset=X-UNKNOWN, Size: 1894 bytes --]

On Tue, 3 Dec 2002, James Stafford wrote:

> Attached are two patches that add basic Envy24HT support to the ICE1712
> driver and VT1616 to the AC97 codec driver. They were made against the cvs
> from today.
> 
> Issues:
> Quote from VT1616 data sheet: "The VT1616 powers up with pins 39 and 41
> assigned to the Front channel DACs as described in the 2.2 specification.
> When this bit is to “0”, the output pins get assigned to the Rear stereo
> DAC pair with an independent volume control." 
> The reference design uses pins 39 and 41 for the left and right rear
> outputs. I have added a control to set this bit to 0 but the default is 1.
> Should a patch function be used to set the default to 0?

I think that the default should be left in the AC97 code and write the 
appropriate configuration after snd_ac97_mixer() call when you detect your 
hardware and VT1616 codec.

> When using applications such as MPlayer and ac3dec, the centre/lfe and rear
> outputs are swapped so that the data for the rear comes out of centre/lfe
> and vice versa. Is there something I have missed here?

We send data in this order: channel0,1 = front; channel2,3 = rear; 
channel4,5 = center/lfe ; if your hardware has swapped some stereo paths, 
you need to swap channels in software - see 
alsa-lib/src/conf/cards/ICH.conf - ICH.pcm.surround51.0 {} section

I've applied your patch and fixed one missing update in ice1712.h. Also, 
the driver id is changed in CVS.

						Jaroslav

-----
Jaroslav Kysela <perex@suse.cz>
Linux Kernel Sound Maintainer
ALSA Project, SuSE Labs



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Re: [PATCH] Envy24HT

[James Stafford]

At 19:06 03/12/02 +0100, you wrote:

>I think that the default should be left in the AC97 code and write the 
>appropriate configuration after snd_ac97_mixer() call when you detect your 
>hardware and VT1616 codec.

I have added a build_controls function in the amp.c file which sets the
relavent ac97 register. Is this the correct way to do this?

>We send data in this order: channel0,1 = front; channel2,3 = rear; 
>channel4,5 = center/lfe ; if your hardware has swapped some stereo paths, 
>you need to swap channels in software - see 
>alsa-lib/src/conf/cards/ICH.conf - ICH.pcm.surround51.0 {} section
Once I have a conf file, what do I do with it and how do I use it? 

As a test, I added 

pcm.ice1724 {
	type plug
	ttable.0.0 1
	ttable.1.1 1
	ttable.2.4 1
	ttable.3.5 1
	ttable.4.2 1
	ttable.5.3 1
	slave.pcm {
		type hw
		card 0
		device 0
	}
}

to my ~/.asoundrc file.
The channels were then routed correctly when using the "ice1724" device.



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Re: [PATCH] Envy24HT

[Jaroslav Kysela]

On Wed, 4 Dec 2002, James Stafford wrote:

> At 19:06 03/12/02 +0100, you wrote:
> 
> >I think that the default should be left in the AC97 code and write the 
> >appropriate configuration after snd_ac97_mixer() call when you detect your 
> >hardware and VT1616 codec.
> 
> I have added a build_controls function in the amp.c file which sets the
> relavent ac97 register. Is this the correct way to do this?

The controls should be built in the ac97_codec.c, but the initial settings 
of AC97 registers might be done in the amp.c file.

> >We send data in this order: channel0,1 = front; channel2,3 = rear; 
> >channel4,5 = center/lfe ; if your hardware has swapped some stereo paths, 
> >you need to swap channels in software - see 
> >alsa-lib/src/conf/cards/ICH.conf - ICH.pcm.surround51.0 {} section
> Once I have a conf file, what do I do with it and how do I use it? 
> 
> As a test, I added 
> 
> pcm.ice1724 {
> 	type plug
> 	ttable.0.0 1
> 	ttable.1.1 1
> 	ttable.2.4 1
> 	ttable.3.5 1
> 	ttable.4.2 1
> 	ttable.5.3 1
> 	slave.pcm {
> 		type hw
> 		card 0
> 		device 0
> 	}
> }
> 
> to my ~/.asoundrc file.
> The channels were then routed correctly when using the "ice1724" device.

If you follow the ICH.conf file (and/or ICE1712.conf) file, then you can 
use 'surround51' device as ac3dec uses: 'aplay -D plug:surround51' .
The new name will be ICE1724.conf (I changed the driver ID for the new 
chip). Unfortunately, at the time, we cannot distinguish more 
hardware variations for given driver, but hopefully, it will change in the 
future.

						Jaroslav

-----
Jaroslav Kysela <perex@suse.cz>
Linux Kernel Sound Maintainer
ALSA Project, SuSE Labs



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Re: [PATCH] Envy24HT

[James Stafford]

At 14:05 04/12/02 +0100, Jaroslav Kysela wrote:
 
>> I have added a build_controls function in the amp.c file which sets the
>> relavent ac97 register. Is this the correct way to do this?
>
>The controls should be built in the ac97_codec.c, but the initial settings 
>of AC97 registers might be done in the amp.c file.

All the controls are built in ac97_codec.c. I only write to one of the ac97
registers in the build_controls function from the snd_ice1712_card_info
structure because it was the only card specific function call after the
call to snd_ice1712_ac97_mixer. Would it be better to add a new function
pointer to the snd_ice1712_card_info structure for setting the initial
values of the chip specific ac97 registers (such as the rerouting of some
of the outputs) ?
I thought it was best not to write the ac97 register in ice1712.c since not
all Envy24HT cards use the VT1616.

>If you follow the ICH.conf file (and/or ICE1712.conf) file, then you can 
>use 'surround51' device as ac3dec uses: 'aplay -D plug:surround51' .
>The new name will be ICE1724.conf (I changed the driver ID for the new 
>chip). Unfortunately, at the time, we cannot distinguish more 
>hardware variations for given driver, but hopefully, it will change in the 
>future.

Ok, I understand you now. 

--
James Stafford


mailto:jstafford@ampltd.com

Advanced Micro Peripherals Ltd 
Unit 17
Sedgeway Business Park
Witchford
Cambridge
CB6 2HY

Tel: +44 1353 659 500 
Fax:+44 1353 659 600 



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Re: [PATCH] Envy24HT

[James Stafford]

Here are some more patches for Envy24HT support in the ICE1712 driver.
For now, I have left some of the debug code I accidentally left in the last
patch, since it is only added to the /proc output.

The name of the PCM streams for the ICE1724 is changed to "ICE1724 multi"
from "ICE1712 multi"
The ICE1724.conf file is added to alsa-lib/src/conf/cards to fix the
channel routing 

Index: alsa-kernel/pci/ice1712/amp.c
===================================================================
RCS file: /cvsroot/alsa/alsa-kernel/pci/ice1712/amp.c,v
retrieving revision 1.1
diff -u -r1.1 amp.c
--- alsa-kernel/pci/ice1712/amp.c	3 Dec 2002 17:53:43 -0000	1.1
+++ alsa-kernel/pci/ice1712/amp.c	4 Dec 2002 15:04:05 -0000
@@ -42,6 +42,12 @@
 	return 0;
 }
 
+static int __devinit snd_vt1724_amp_add_controls(ice1712_t *ice)
+{
+	/* we use pins 39 and 41 of the VT1616 for left and right read outputs */
+	snd_ac97_write_cache(ice->ac97, 0x5a, snd_ac97_read(ice->ac97, 0x5a) &
~0x8000);
+}
+
 
 /* entry point */
 struct snd_ice1712_card_info snd_vt1724_amp_cards[] __devinitdata = {
@@ -49,6 +55,7 @@
 		VT1724_SUBDEVICE_AUDIO2000,
 		"AMP Ltd AUDIO2000",
 		snd_vt1724_amp_init,
+		snd_vt1724_amp_add_controls,
 	},
 	{ } /* terminator */
 };
Index: alsa-kernel/pci/ice1712/ice1712.c
===================================================================
RCS file: /cvsroot/alsa/alsa-kernel/pci/ice1712/ice1712.c,v
retrieving revision 1.14
diff -u -r1.14 ice1712.c
--- alsa-kernel/pci/ice1712/ice1712.c	3 Dec 2002 21:15:29 -0000	1.14
+++ alsa-kernel/pci/ice1712/ice1712.c	4 Dec 2002 15:04:17 -0000
@@ -1405,7 +1405,11 @@
 
 	if (rpcm)
 		*rpcm = NULL;
-	err = snd_pcm_new(ice->card, "ICE1712 multi", device, 1, 1, &pcm);
+	if (ice->vt1724)
+		err = snd_pcm_new(ice->card, "ICE1724 multi", device, 1, 1, &pcm);
+	else
+		err = snd_pcm_new(ice->card, "ICE1712 multi", device, 1, 1, &pcm);
+
 	if (err < 0)
 		return err;
 
@@ -1415,7 +1419,10 @@
 	pcm->private_data = ice;
 	pcm->private_free = snd_ice1712_pcm_profi_free;
 	pcm->info_flags = 0;

-	strcpy(pcm->name, "ICE1712 multi");
+	if (ice->vt1724)
+		strcpy(pcm->name, "ICE1724 multi");
+	else
+		strcpy(pcm->name, "ICE1712 multi");
 
 	snd_pcm_lib_preallocate_pci_pages_for_all(ice->pci, pcm, 256*1024,
256*1024);
 
Index: alsa-lib/src/conf/cards/Makefile.am
===================================================================
RCS file: /cvsroot/alsa/alsa-lib/src/conf/cards/Makefile.am,v
retrieving revision 1.9
diff -u -r1.9 Makefile.am
--- alsa-lib/src/conf/cards/Makefile.am	29 Nov 2002 14:50:03 -0000	1.9
+++ alsa-lib/src/conf/cards/Makefile.am	4 Dec 2002 15:04:19 -0000
@@ -10,6 +10,7 @@
 	FM801.conf \
 	GUS.conf \
 	ICE1712.conf \
+	ICE1724.conf \
 	ICH.conf \
 	RME9636.conf \
 	RME9652.conf \


diff -u -N -r cvs2/alsa-lib/src/conf/cards/ICE1724.conf
cvs-envy24ht/alsa-lib/src/conf/cards/ICE1724.conf
--- cvs2/alsa-lib/src/conf/cards/ICE1724.conf	Thu Jan  1 01:00:00 1970
+++ cvs-envy24ht/alsa-lib/src/conf/cards/ICE1724.conf	Wed Dec  4 15:34:26 2002
@@ -0,0 +1,100 @@
+#
+# Configuration for the ICE1724 (Envy24HT) chip
+#
+
+<confdir:pcm/front.conf>
+
+ICE1724.pcm.front.0 {
+	@args [ CARD ]
+	@args.CARD {
+		type string
+	}
+	type route
+	ttable.0.0 1
+	ttable.1.1 1
+	slave.pcm {
+		type hw
+		card $CARD
+	}
+}	
+
+<confdir:pcm/surround40.conf>
+
+ICE1724.pcm.surround40.0 {
+	@args [ CARD ]
+	@args.CARD {
+		type string
+	}
+	type route
+	ttable.0.0 1
+	ttable.1.1 1
+	ttable.2.4 1
+	ttable.3.5 1
+	slave.pcm {
+		type hw
+		card $CARD
+	}
+}	
+
+<confdir:pcm/surround51.conf>
+
+ICE1724.pcm.surround51.0 {
+	@args [ CARD ]
+	@args.CARD {
+		type string
+	}
+	type route
+	ttable.0.0 1
+	ttable.1.1 1
+	ttable.2.4 1
+	ttable.3.5 1
+	ttable.4.2 1
+	ttable.5.3 1
+	slave.pcm {
+		type hw
+		card $CARD
+	}
+}
+
+<confdir:pcm/iec958.conf>
+
+ICE1724.pcm.iec958.0 {
+	@args [ CARD AES0 AES1 AES2 AES3 ]
+	@args.CARD {
+		type string
+	}
+	@args.AES0 {
+		type integer
+	}
+	@args.AES1 {
+		type integer
+	}
+	@args.AES2 {
+		type integer
+	}
+	@args.AES3 {
+		type integer
+	}
+	type hooks
+	slave.pcm {
+		type route
+		ttable.0.6 1
+		ttable.1.7 1
+		slave.pcm {
+			type hw
+			card $CARD
+		}
+	}
+	hooks.0 {
+		type ctl_elems
+		hook_args [
+			{
+				interface PCM
+				name "IEC958 Playback PCM Stream"
+				lock true
+				preserve true
+				value [ $AES0 $AES1 $AES2 $AES3 ]
+			}
+		]
+	}
+}

--
James Stafford


mailto:jstafford@ampltd.com

Advanced Micro Peripherals Ltd 
Unit 17
Sedgeway Business Park
Witchford
Cambridge
CB6 2HY

Tel: +44 1353 659 500 
Fax:+44 1353 659 600 



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[PATCH] Envy24HT

[James Stafford]

[-- Attachment #1: Type: text/plain, Size: 201 bytes --]

One of the attached patches correct a problem with the surround speakers 
with the AUDIO2000 Envy24HT based board. The other patch adds the 
ICE1724.conf file to the alsa-lib/src/conf/cards directory.

[-- Attachment #2: patch-envy24ht-surroundfix.diff --]
[-- Type: application/octet-stream, Size: 646 bytes --]

--- alsa-kernel/pci/ice1712/amp.c	3 Dec 2002 17:53:43 -0000	1.1
+++ alsa-kernel/pci/ice1712/amp.c	4 Dec 2002 15:04:05 -0000
@@ -42,6 +42,12 @@
 	return 0;
 }
 
+static int __devinit snd_vt1724_amp_add_controls(ice1712_t *ice)
+{
+	/* we use pins 39 and 41 of the VT1616 for left and right read outputs */
+	snd_ac97_write_cache(ice->ac97, 0x5a, snd_ac97_read(ice->ac97, 0x5a) & ~0x8000);
+}
+
 
 /* entry point */
 struct snd_ice1712_card_info snd_vt1724_amp_cards[] __devinitdata = {
@@ -49,6 +55,7 @@
 		VT1724_SUBDEVICE_AUDIO2000,
 		"AMP Ltd AUDIO2000",
 		snd_vt1724_amp_init,
+		snd_vt1724_amp_add_controls,
 	},
 	{ } /* terminator */
 };

[-- Attachment #3: patch-envy24ht-addconf.diff --]
[-- Type: application/octet-stream, Size: 1875 bytes --]

--- alsa-lib/src/conf/cards/Makefile.am	29 Nov 2002 14:50:03 -0000	1.9
+++ alsa-lib/src/conf/cards/Makefile.am	4 Dec 2002 15:04:19 -0000
@@ -10,6 +10,7 @@
 	FM801.conf \
 	GUS.conf \
 	ICE1712.conf \
+	ICE1724.conf \
 	ICH.conf \
 	RME9636.conf \
 	RME9652.conf \


diff -u -N -r cvs2/alsa-lib/src/conf/cards/ICE1724.conf
cvs-envy24ht/alsa-lib/src/conf/cards/ICE1724.conf
--- cvs2/alsa-lib/src/conf/cards/ICE1724.conf	Thu Jan  1 01:00:00 1970
+++ cvs-envy24ht/alsa-lib/src/conf/cards/ICE1724.conf	Wed Dec  4 15:34:26 2002
@@ -0,0 +1,100 @@
+#
+# Configuration for the ICE1724 (Envy24HT) chip
+#
+
+<confdir:pcm/front.conf>
+
+ICE1724.pcm.front.0 {
+	@args [ CARD ]
+	@args.CARD {
+		type string
+	}
+	type route
+	ttable.0.0 1
+	ttable.1.1 1
+	slave.pcm {
+		type hw
+		card $CARD
+	}
+}	
+
+<confdir:pcm/surround40.conf>
+
+ICE1724.pcm.surround40.0 {
+	@args [ CARD ]
+	@args.CARD {
+		type string
+	}
+	type route
+	ttable.0.0 1
+	ttable.1.1 1
+	ttable.2.4 1
+	ttable.3.5 1
+	slave.pcm {
+		type hw
+		card $CARD
+	}
+}	
+
+<confdir:pcm/surround51.conf>
+
+ICE1724.pcm.surround51.0 {
+	@args [ CARD ]
+	@args.CARD {
+		type string
+	}
+	type route
+	ttable.0.0 1
+	ttable.1.1 1
+	ttable.2.4 1
+	ttable.3.5 1
+	ttable.4.2 1
+	ttable.5.3 1
+	slave.pcm {
+		type hw
+		card $CARD
+	}
+}
+
+<confdir:pcm/iec958.conf>
+
+ICE1724.pcm.iec958.0 {
+	@args [ CARD AES0 AES1 AES2 AES3 ]
+	@args.CARD {
+		type string
+	}
+	@args.AES0 {
+		type integer
+	}
+	@args.AES1 {
+		type integer
+	}
+	@args.AES2 {
+		type integer
+	}
+	@args.AES3 {
+		type integer
+	}
+	type hooks
+	slave.pcm {
+		type route
+		ttable.0.6 1
+		ttable.1.7 1
+		slave.pcm {
+			type hw
+			card $CARD
+		}
+	}
+	hooks.0 {
+		type ctl_elems
+		hook_args [
+			{
+				interface PCM
+				name "IEC958 Playback PCM Stream"
+				lock true
+				preserve true
+				value [ $AES0 $AES1 $AES2 $AES3 ]
+			}
+		]
+	}
+}

[-- Attachment #4: Type: text/plain, Size: 183 bytes --]

--
James Stafford


mailto:jstafford@ampltd.com

Advanced Micro Peripherals Ltd
Unit 17
Sedgeway Business Park
Witchford
Cambridge
CB6 2HY

Tel: +44 1353 659 500
Fax:+44 1353 659 600

Re: [PATCH] Envy24HT

[Takashi Iwai]

Hi,

At Mon, 27 Jan 2003 13:31:38 +0000,
James Stafford wrote:
> 
> One of the attached patches correct a problem with the surround speakers 
> with the AUDIO2000 Envy24HT based board. The other patch adds the 
> ICE1724.conf file to the alsa-lib/src/conf/cards directory.

thanks, applied to cvs now.


Takashi


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