Hi.
It seems that PnP configured ESS-18xx devices don't have half-duplex
support. Attached are two patches (against linux-2.6.20) to address this.
The first patch allows the driver to recognize a PnP configured card at
half duplex.
The second patch corrects the PnP configuration information for cards
such as mine which have no configuration option with only one DMA channel.
My /proc/asound/cards looks like this:
0 [CMI8738 ]: CMI8738 - C-Media PCI CMI8738
C-Media PCI CMI8738 (model 37) at 0xd800, irq 9
1 [AZT2320 ]: AZT2320 - Aztech AZT2320
Aztech AZT2320, WSS at 0x400, irq 5, dma 0&1
2 [ES1868 ]: ES1868 - ESS AudioDrive ES1868
ESS AudioDrive ES1868 at 0x220, irq 11, dma 3
PCM and FM playback works in this configuration. I have not tried PCM
recording.
--
Rask Ingemann Lambertsen
--- sound/isa/es18xx.c-orig 2007-02-18 10:16:52.000000000 +0100
+++ sound/isa/es18xx.c 2007-02-18 10:16:52.000000000 +0100
@@ -2091,6 +2091,8 @@ static int __devinit snd_audiodrive_pnp_
mpu_port[dev] = pnp_port_start(pdev, 2);
dma1[dev] = pnp_dma(pdev, 0);
dma2[dev] = pnp_dma(pdev, 1);
+ if (dma2[dev] == -1)
+ dma2[dev] = dma1[dev];
irq[dev] = pnp_irq(pdev, 0);
snd_printdd("PnP ES18xx: port=0x%lx, fm port=0x%lx, mpu port=0x%lx\n", port[dev], fm_port[dev], mpu_port[dev]);
snd_printdd("PnP ES18xx: dma1=%i, dma2=%i, irq=%i\n", dma1[dev], dma2[dev], irq[dev]);
--- drivers/pnp/quirks.c.orig 2007-02-04 19:44:54.000000000 +0100
+++ drivers/pnp/quirks.c 2007-02-19 21:24:57.000000000 +0100
@@ -106,6 +107,64 @@ static void quirk_sb16audio_resources(st
return;
}
+static void quirk_ess1868_audio_resources(struct pnp_dev *dev)
+{
+ struct pnp_port *port1, *port2, *port3;
+ struct pnp_irq *irq1;
+ struct pnp_dma *dma1;
+ struct pnp_option *res, *last, *new;
+ unsigned int n = 0;
+
+ /*
+ * The card works with only one DMA channel at half duplex, but all
+ * configuration options require two DMA channels. Create a new con-
+ * figuration option which requires only one DMA channel for half
+ * duplex operation.
+ */
+ if (!dev->dependent)
+ return;
+ for (res = dev->dependent; res; last = res, res = res->next)
+ if (!res->dma->next)
+ return;
+
+ if (n == 0 && (port1 = pnp_alloc (sizeof (struct pnp_port))))
+ n++;
+ if (n == 1 && (port2 = pnp_alloc (sizeof (struct pnp_port))))
+ n++;
+ if (n == 2 && (port3 = pnp_alloc (sizeof (struct pnp_port))))
+ n++;
+ if (n == 3 && (irq1 = pnp_alloc (sizeof (struct pnp_irq))))
+ n++;
+ if (n == 4 && (dma1 = pnp_alloc (sizeof (struct pnp_dma))))
+ n++;
+ if (n == 5 && (new = pnp_register_dependent_option (dev, PNP_RES_PRIORITY_FUNCTIONAL)))
+ n ++;
+ switch (n) {
+ case 5: kfree (dma1); /* fall through */
+ case 4: kfree (irq1); /* fall through */
+ case 3: kfree (port3); /* fall through */
+ case 2: kfree (port2); /* fall through */
+ case 1: kfree (port1); /* fall through */
+ case 0: return;
+ default: break;
+ }
+ memcpy (port1, last->port, sizeof (struct pnp_port));
+ port1->next = port2;
+ memcpy (port2, last->port->next, sizeof (struct pnp_port));
+ port2->next = port3;
+ memcpy (port3, last->port->next->next, sizeof (struct pnp_port));
+ port3->next = NULL;
+ memcpy (irq1, last->irq, sizeof (struct pnp_irq));
+ irq1->next = NULL;
+ memcpy (dma1, last->dma, sizeof (struct pnp_dma));
+ dma1->next = NULL;
+ pnp_register_port_resource (new, port1);
+ pnp_register_irq_resource (new, irq1);
+ pnp_register_dma_resource (new, dma1);
+
+ printk(KERN_INFO "pnp: ESS1868 audio device quirk - enabling half duplex\n");
+}
+
/*
* PnP Quirks
* Cards or devices that need some tweaking due to incomplete resource info
@@ -126,6 +185,8 @@ static struct pnp_fixup pnp_fixups[] = {
{ "CTL0043", quirk_sb16audio_resources },
{ "CTL0044", quirk_sb16audio_resources },
{ "CTL0045", quirk_sb16audio_resources },
+ /* ESS1868 audio device DMA quirk. */
+ { "ESS1868", quirk_ess1868_audio_resources },
{ "" }
};
-------------------------------------------------------------------------
Take Surveys. Earn Cash. Influence the Future of IT
Join SourceForge.net's Techsay panel and you'll get the chance to share your
opinions on IT & business topics through brief surveys-and earn cash
http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV
_______________________________________________
Alsa-devel mailing list
Alsa-devel@xxxxxxxxxxxxxxxxxxxxx
https://lists.sourceforge.net/lists/listinfo/alsa-devel
