ALSA: jazz16: refine dma and irq selection

Narrow the dma and irq selection after the DOS driver.

Add ALSA configuration description as well.

Signed-off-by: Krzysztof Helt <krzysztof.h1@wp.pl>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

2 files changed, 22 insertions, 2 deletions

diff --git a/sound/isa/sb/jazz16.c b/sound/isa/sb/jazz16.c
index d52966b75846..8d21a3feda3a 100644
--- a/sound/isa/sb/jazz16.c
+++ b/sound/isa/sb/jazz16.c
@@ -189,10 +189,29 @@ static int __devinit snd_jazz16_match(struct device *devptr, unsigned int dev)
         if (port[dev] == SNDRV_AUTO_PORT) {
                 snd_printk(KERN_ERR "please specify port\n");
                 return 0;
+        } else if (port[dev] == 0x200 || (port[dev] & ~0x270)) {
+                snd_printk(KERN_ERR "incorrect port specified\n");
+                return 0;
+        }
+        if (dma8[dev] != SNDRV_AUTO_DMA &&
+            dma8[dev] != 1 && dma8[dev] != 3) {
+                snd_printk(KERN_ERR "dma8 must be 1 or 3\n");
+                return 0;
         }
         if (dma16[dev] != SNDRV_AUTO_DMA &&
             dma16[dev] != 5 && dma16[dev] != 7) {
-                snd_printk(KERN_ERR "dma16 must be 5 or 7");
+                snd_printk(KERN_ERR "dma16 must be 5 or 7\n");
+                return 0;
+        }
+        if (mpu_port[dev] != SNDRV_AUTO_PORT &&
+            (mpu_port[dev] & ~0x030) != 0x300) {
+                snd_printk(KERN_ERR "incorrect mpu_port specified\n");
+                return 0;
+        }
+        if (mpu_irq[dev] != SNDRV_AUTO_DMA &&
+            mpu_irq[dev] != 2 && mpu_irq[dev] != 3 &&
+            mpu_irq[dev] != 5 && mpu_irq[dev] != 7) {
+                snd_printk(KERN_ERR "mpu_irq must be 2, 3, 5 or 7\n");
                 return 0;
         }
         return 1;
diff --git a/sound/isa/sb/sb8_main.c b/sound/isa/sb/sb8_main.c
index 3222aed5fac6..7d84c9f34dc9 100644
--- a/sound/isa/sb/sb8_main.c
+++ b/sound/isa/sb/sb8_main.c
@@ -510,7 +510,8 @@ static int snd_sb8_open(struct snd_pcm_substream *substream)
         }
         switch (chip->hardware) {
         case SB_HW_JAZZ16:
-                runtime->hw.formats |= SNDRV_PCM_FMTBIT_S16_LE;
+                if (chip->dma16 == 5 || chip->dma16 == 7)
+                        runtime->hw.formats |= SNDRV_PCM_FMTBIT_S16_LE;
                 runtime->hw.rates |= SNDRV_PCM_RATE_8000_48000;
                 runtime->hw.rate_min = 4000;
                 runtime->hw.rate_max = 50000;