ALSA: control: Avoid kernel warnings from tlv ioctl with numid 0

[pandora-kernel.git] / sound / pci / sis7019.c

diff --git a/sound/pci/sis7019.c b/sound/pci/sis7019.c
index a391e62..28dfafb 100644 (file)
--- a/sound/pci/sis7019.c
+++ b/sound/pci/sis7019.c
@@ -41,6 +41,7 @@ MODULE_SUPPORTED_DEVICE("{{SiS,SiS7019 Audio Accelerator}}");
 static int index = SNDRV_DEFAULT_IDX1; /* Index 0-MAX */
 static char *id = SNDRV_DEFAULT_STR1;  /* ID for this card */
 static int enable = 1;
+static int codecs = 1;
 
 module_param(index, int, 0444);
 MODULE_PARM_DESC(index, "Index value for SiS7019 Audio Accelerator.");
@@ -48,6 +49,8 @@ module_param(id, charp, 0444);
 MODULE_PARM_DESC(id, "ID string for SiS7019 Audio Accelerator.");
 module_param(enable, bool, 0444);
 MODULE_PARM_DESC(enable, "Enable SiS7019 Audio Accelerator.");
+module_param(codecs, int, 0444);
+MODULE_PARM_DESC(codecs, "Set bit to indicate that codec number is expected to be present (default 1)");
 
 static DEFINE_PCI_DEVICE_TABLE(snd_sis7019_ids) = {
        { PCI_DEVICE(PCI_VENDOR_ID_SI, 0x7019) },
@@ -140,6 +143,9 @@ struct sis7019 {
        dma_addr_t silence_dma_addr;
 };
 
+/* These values are also used by the module param 'codecs' to indicate
+ * which codecs should be present.
+ */
 #define SIS_PRIMARY_CODEC_PRESENT      0x0001
 #define SIS_SECONDARY_CODEC_PRESENT    0x0002
 #define SIS_TERTIARY_CODEC_PRESENT     0x0004
@@ -1078,6 +1084,7 @@ static int sis_chip_init(struct sis7019 *sis)
 {
        unsigned long io = sis->ioport;
        void __iomem *ioaddr = sis->ioaddr;
+       unsigned long timeout;
        u16 status;
        int count;
        int i;
@@ -1104,21 +1111,45 @@ static int sis_chip_init(struct sis7019 *sis)
        while ((inw(io + SIS_AC97_STATUS) & SIS_AC97_STATUS_BUSY) && --count)
                udelay(1);
 
+       /* Command complete, we can let go of the semaphore now.
+        */
+       outl(SIS_AC97_SEMA_RELEASE, io + SIS_AC97_SEMA);
+       if (!count)
+               return -EIO;
+
        /* Now that we've finished the reset, find out what's attached.
+        * There are some codec/board combinations that take an extremely
+        * long time to come up. 350+ ms has been observed in the field,
+        * so we'll give them up to 500ms.
         */
-       status = inl(io + SIS_AC97_STATUS);
-       if (status & SIS_AC97_STATUS_CODEC_READY)
-               sis->codecs_present |= SIS_PRIMARY_CODEC_PRESENT;
-       if (status & SIS_AC97_STATUS_CODEC2_READY)
-               sis->codecs_present |= SIS_SECONDARY_CODEC_PRESENT;
-       if (status & SIS_AC97_STATUS_CODEC3_READY)
-               sis->codecs_present |= SIS_TERTIARY_CODEC_PRESENT;
-
-       /* All done, let go of the semaphore, and check for errors
+       sis->codecs_present = 0;
+       timeout = msecs_to_jiffies(500) + jiffies;
+       while (time_before_eq(jiffies, timeout)) {
+               status = inl(io + SIS_AC97_STATUS);
+               if (status & SIS_AC97_STATUS_CODEC_READY)
+                       sis->codecs_present |= SIS_PRIMARY_CODEC_PRESENT;
+               if (status & SIS_AC97_STATUS_CODEC2_READY)
+                       sis->codecs_present |= SIS_SECONDARY_CODEC_PRESENT;
+               if (status & SIS_AC97_STATUS_CODEC3_READY)
+                       sis->codecs_present |= SIS_TERTIARY_CODEC_PRESENT;
+
+               if (sis->codecs_present == codecs)
+                       break;
+
+               msleep(1);
+       }
+
+       /* All done, check for errors.
         */
-       outl(SIS_AC97_SEMA_RELEASE, io + SIS_AC97_SEMA);
-       if (!sis->codecs_present || !count)
+       if (!sis->codecs_present) {
+               printk(KERN_ERR "sis7019: could not find any codecs\n");
                return -EIO;
+       }
+
+       if (sis->codecs_present != codecs) {
+               printk(KERN_WARNING "sis7019: missing codecs, found %0x, expected %0x\n",
+                      sis->codecs_present, codecs);
+       }
 
        /* Let the hardware know that the audio driver is alive,
         * and enable PCM slots on the AC-link for L/R playback (3 & 4) and
@@ -1390,6 +1421,17 @@ static int __devinit snd_sis7019_probe(struct pci_dev *pci,
        if (!enable)
                goto error_out;
 
+       /* The user can specify which codecs should be present so that we
+        * can wait for them to show up if they are slow to recover from
+        * the AC97 cold reset. We default to a single codec, the primary.
+        *
+        * We assume that SIS_PRIMARY_*_PRESENT matches bits 0-2.
+        */
+       codecs &= SIS_PRIMARY_CODEC_PRESENT | SIS_SECONDARY_CODEC_PRESENT |
+                 SIS_TERTIARY_CODEC_PRESENT;
+       if (!codecs)
+               codecs = SIS_PRIMARY_CODEC_PRESENT;
+
        rc = snd_card_create(index, id, THIS_MODULE, sizeof(*sis), &card);
        if (rc < 0)
                goto error_out;