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SubjectPATCH 2.4.4: Via audio fixes
The attached patch includes fixes to the Via audio driver for which I'm
interested finding testers. Testing and a private "it works" (hopefully
:)) or "it doesn't work, <here> is what breaks for me" would be
appreciated.
--
Jeff Garzik | Game called on account of naked chick
Building 1024 |
MandrakeSoft |Index: linux_2_4/drivers/sound/via82cxxx_audio.c
diff -u linux_2_4/drivers/sound/via82cxxx_audio.c:1.1.1.16 linux_2_4/drivers/sound/via82cxxx_audio.c:1.1.1.16.70.3
--- linux_2_4/drivers/sound/via82cxxx_audio.c:1.1.1.16 Sat Mar 3 18:12:35 2001
+++ linux_2_4/drivers/sound/via82cxxx_audio.c Mon Apr 30 09:35:21 2001
@@ -15,7 +15,7 @@
*/


-#define VIA_VERSION "1.1.14b"
+#define VIA_VERSION "1.1.15"


#include <linux/config.h>
@@ -92,6 +92,7 @@
#endif

/* 82C686 function 5 (audio codec) PCI configuration registers */
+#define VIA_ACLINK_STATUS 0x40
#define VIA_ACLINK_CTRL 0x41
#define VIA_FUNC_ENABLE 0x42
#define VIA_PNP_CONTROL 0x43
@@ -1405,20 +1406,41 @@
#endif

/*
- * reset AC97 controller: enable, disable, enable
- * pause after each command for good luck
+ * Reset AC97 controller: enable, disable, enable,
+ * pausing after each command for good luck. Only
+ * do this if the codec is not ready, because it causes
+ * loud pops and such due to such a hard codec reset.
*/
- pci_write_config_byte (pdev, VIA_ACLINK_CTRL, VIA_CR41_AC97_ENABLE |
- VIA_CR41_AC97_RESET | VIA_CR41_AC97_WAKEUP);
- udelay (100);
-
- pci_write_config_byte (pdev, VIA_ACLINK_CTRL, 0);
- udelay (100);
-
- pci_write_config_byte (pdev, VIA_ACLINK_CTRL,
- VIA_CR41_AC97_ENABLE | VIA_CR41_PCM_ENABLE |
- VIA_CR41_VRA | VIA_CR41_AC97_RESET);
- udelay (100);
+ pci_read_config_byte (pdev, VIA_ACLINK_STATUS, &tmp8);
+ if ((tmp8 & VIA_CR40_AC97_READY) == 0) {
+ pci_write_config_byte (pdev, VIA_ACLINK_CTRL,
+ VIA_CR41_AC97_ENABLE |
+ VIA_CR41_AC97_RESET |
+ VIA_CR41_AC97_WAKEUP);
+ udelay (100);
+
+ pci_write_config_byte (pdev, VIA_ACLINK_CTRL, 0);
+ udelay (100);
+
+ pci_write_config_byte (pdev, VIA_ACLINK_CTRL,
+ VIA_CR41_AC97_ENABLE |
+ VIA_CR41_PCM_ENABLE |
+ VIA_CR41_VRA | VIA_CR41_AC97_RESET);
+ udelay (100);
+ }
+
+ /* Make sure VRA is enabled, in case we didn't do a
+ * complete codec reset, above
+ */
+ pci_read_config_byte (pdev, VIA_ACLINK_CTRL, &tmp8);
+ if (((tmp8 & VIA_CR41_VRA) == 0) ||
+ ((tmp8 & VIA_CR41_AC97_ENABLE) == 0) ||
+ ((tmp8 & VIA_CR41_PCM_ENABLE) == 0) ||
+ ((tmp8 & VIA_CR41_AC97_RESET) == 0))
+ pci_write_config_byte (pdev, VIA_ACLINK_CTRL,
+ VIA_CR41_AC97_ENABLE |
+ VIA_CR41_PCM_ENABLE |
+ VIA_CR41_VRA | VIA_CR41_AC97_RESET);

#if 0 /* this breaks on K7M */
/* disable legacy stuff */
@@ -1983,17 +2005,16 @@
tmp = atomic_read (&chan->n_frags);
assert (tmp >= 0);
assert (tmp <= chan->frag_number);
- while (tmp == 0) {
+ if (tmp == 0) {
+ int ret;
if (nonblock || !chan->is_active)
return -EAGAIN;

DPRINTK ("Sleeping on block %d\n", n);
- interruptible_sleep_on (&chan->wait);
-
- if (signal_pending (current))
- return -ERESTARTSYS;
-
- tmp = atomic_read (&chan->n_frags);
+ ret = wait_event_interruptible(chan->wait,
+ (tmp = atomic_read(&chan->n_frags)));
+ if (ret < 0)
+ return ret;
}

/* Now that we have a buffer we can read from, send
@@ -2130,17 +2151,16 @@
tmp = atomic_read (&chan->n_frags);
assert (tmp >= 0);
assert (tmp <= chan->frag_number);
- while (tmp == 0) {
+ if (tmp == 0) {
+ int ret;
if (nonblock || !chan->is_enabled)
return -EAGAIN;

DPRINTK ("Sleeping on page %d, tmp==%d, ir==%d\n", n, tmp, chan->is_record);
- interruptible_sleep_on (&chan->wait);
-
- if (signal_pending (current))
- return -ERESTARTSYS;
-
- tmp = atomic_read (&chan->n_frags);
+ ret = wait_event_interruptible(chan->wait,
+ (tmp = atomic_read(&chan->n_frags)));
+ if (ret < 0)
+ return ret;
}

/* Now that we have at least one fragment we can write to, fill the buffer
@@ -2324,7 +2344,8 @@

via_chan_maybe_start (chan);

- while (atomic_read (&chan->n_frags) < chan->frag_number) {
+ if (atomic_read (&chan->n_frags) < chan->frag_number) {
+ int ret;
if (nonblock) {
DPRINTK ("EXIT, returning -EAGAIN\n");
return -EAGAIN;
@@ -2357,11 +2378,11 @@
#endif

DPRINTK ("sleeping, nbufs=%d\n", atomic_read (&chan->n_frags));
- interruptible_sleep_on (&chan->wait);
-
- if (signal_pending (current)) {
+ ret = wait_event_interruptible(chan->wait,
+ (atomic_read (&chan->n_frags) >= chan->frag_number));
+ if (ret < 0) {
DPRINTK ("EXIT, returning -ERESTARTSYS\n");
- return -ERESTARTSYS;
+ return ret;
}
}

@@ -3012,7 +3033,6 @@
{
int rc;
struct via_info *card;
- u8 tmp;
static int printed_version = 0;

DPRINTK ("ENTER\n");
@@ -3020,24 +3040,19 @@
if (printed_version++ == 0)
printk (KERN_INFO "Via 686a audio driver " VIA_VERSION "\n");

- if (!request_region (pci_resource_start (pdev, 0),
- pci_resource_len (pdev, 0),
- VIA_MODULE_NAME)) {
- printk (KERN_ERR PFX "unable to obtain I/O resources, aborting\n");
- rc = -EBUSY;
+ rc = pci_enable_device (pdev);
+ if (rc)
goto err_out;
- }

- if (pci_enable_device (pdev)) {
- rc = -EIO;
- goto err_out_none;
- }
+ rc = pci_request_regions (pdev, "via82cxxx_audio");
+ if (rc)
+ goto err_out;

card = kmalloc (sizeof (*card), GFP_KERNEL);
if (!card) {
printk (KERN_ERR PFX "out of memory, aborting\n");
rc = -ENOMEM;
- goto err_out_none;
+ goto err_out_res;
}

pci_set_drvdata (pdev, card);
@@ -3108,19 +3123,6 @@
goto err_out_have_proc;
}

- pci_read_config_byte (pdev, 0x3C, &tmp);
- if ((tmp & 0x0F) != pdev->irq) {
- printk (KERN_WARNING PFX "IRQ fixup, 0x3C==0x%02X\n", tmp);
- udelay (15);
- tmp &= 0xF0;
- tmp |= pdev->irq;
- pci_write_config_byte (pdev, 0x3C, tmp);
- DPRINTK ("new 0x3c==0x%02x\n", tmp);
- } else {
- DPRINTK ("IRQ reg 0x3c==0x%02x, irq==%d\n",
- tmp, tmp & 0x0F);
- }
-
printk (KERN_INFO PFX "board #%d at 0x%04lX, IRQ %d\n",
card->card_num + 1, card->baseaddr, pdev->irq);

@@ -3142,8 +3144,8 @@
#endif
kfree (card);

-err_out_none:
- release_region (pci_resource_start (pdev, 0), pci_resource_len (pdev, 0));
+err_out_res:
+ pci_release_regions (pdev);
err_out:
pci_set_drvdata (pdev, NULL);
DPRINTK ("EXIT - returning %d\n", rc);
@@ -3166,7 +3168,7 @@
via_dsp_cleanup (card);
via_ac97_cleanup (card);

- release_region (pci_resource_start (pdev, 0), pci_resource_len (pdev, 0));
+ pci_release_regions (pdev);

#ifndef VIA_NDEBUG
memset (card, 0xAB, sizeof (*card)); /* poison memory */
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