[ALSA] oxygen: make AC97 codec optional

Only initialize and create mixer controls for the first AC97 codec when
one has actually been detected.

Signed-off-by: Clemens Ladisch <clemens@ladisch.de>
Signed-off-by: Jaroslav Kysela <perex@perex.cz>

1 files changed, 50 insertions, 32 deletions

diff --git a/sound/pci/oxygen/oxygen_lib.c b/sound/pci/oxygen/oxygen_lib.c
index 5b77c94..ba2bb49 100644
--- a/sound/pci/oxygen/oxygen_lib.c
+++ b/sound/pci/oxygen/oxygen_lib.c
@@ -142,13 +142,25 @@ static void oxygen_proc_read(struct snd_info_entry *entry,
 	}
 	if (mutex_lock_interruptible(&chip->mutex) < 0)
 		return;
-	snd_iprintf(buffer, "\nAC97\n");
-	for (i = 0; i < 0x80; i += 0x10) {
-		snd_iprintf(buffer, "%02x:", i);
-		for (j = 0; j < 0x10; j += 2)
-			snd_iprintf(buffer, " %04x",
-				    oxygen_read_ac97(chip, 0, i + j));
-		snd_iprintf(buffer, "\n");
+	if (chip->has_ac97_0) {
+		snd_iprintf(buffer, "\nAC97\n");
+		for (i = 0; i < 0x80; i += 0x10) {
+			snd_iprintf(buffer, "%02x:", i);
+			for (j = 0; j < 0x10; j += 2)
+				snd_iprintf(buffer, " %04x",
+					    oxygen_read_ac97(chip, 0, i + j));
+			snd_iprintf(buffer, "\n");
+		}
+	}
+	if (chip->has_ac97_1) {
+		snd_iprintf(buffer, "\nAC97 2\n");
+		for (i = 0; i < 0x80; i += 0x10) {
+			snd_iprintf(buffer, "%02x:", i);
+			for (j = 0; j < 0x10; j += 2)
+				snd_iprintf(buffer, " %04x",
+					    oxygen_read_ac97(chip, 1, i + j));
+			snd_iprintf(buffer, "\n");
+		}
 	}
 	mutex_unlock(&chip->mutex);
 }
@@ -184,6 +196,10 @@ static void __devinit oxygen_init(struct oxygen *chip)
 	if (chip->revision == 1)
 		oxygen_set_bits8(chip, OXYGEN_MISC, OXYGEN_MISC_MAGIC);
 
+	i = oxygen_read16(chip, OXYGEN_AC97_CONTROL);
+	chip->has_ac97_0 = (i & OXYGEN_AC97_CODEC_0) != 0;
+	chip->has_ac97_1 = (i & OXYGEN_AC97_CODEC_1) != 0;
+
 	oxygen_set_bits8(chip, OXYGEN_FUNCTION,
 			 OXYGEN_FUNCTION_RESET_CODEC |
 			 OXYGEN_FUNCTION_ENABLE_SPI_4_5);
@@ -202,31 +218,33 @@ static void __devinit oxygen_init(struct oxygen *chip)
 	oxygen_write16(chip, OXYGEN_DMA_STATUS, 0);
 
 	oxygen_write8(chip, OXYGEN_AC97_INTERRUPT_MASK, 0x00);
-	oxygen_clear_bits16(chip, OXYGEN_AC97_OUT_CONFIG,
-			    OXYGEN_AC97_OUT_MAGIC3);
-	oxygen_set_bits16(chip, OXYGEN_AC97_IN_CONFIG,
-			  OXYGEN_AC97_IN_MAGIC3);
-	oxygen_write_ac97(chip, 0, AC97_RESET, 0);
-	msleep(1);
-	oxygen_ac97_set_bits(chip, 0, 0x70, 0x0300);
-	oxygen_ac97_set_bits(chip, 0, 0x64, 0x8043);
-	oxygen_ac97_set_bits(chip, 0, 0x62, 0x180f);
-	oxygen_write_ac97(chip, 0, AC97_MASTER, 0x0000);
-	oxygen_write_ac97(chip, 0, AC97_PC_BEEP, 0x8000);
-	oxygen_write_ac97(chip, 0, AC97_MIC, 0x8808);
-	oxygen_write_ac97(chip, 0, AC97_LINE, 0x0808);
-	oxygen_write_ac97(chip, 0, AC97_CD, 0x8808);
-	oxygen_write_ac97(chip, 0, AC97_VIDEO, 0x8808);
-	oxygen_write_ac97(chip, 0, AC97_AUX, 0x8808);
-	oxygen_write_ac97(chip, 0, AC97_REC_GAIN, 0x8000);
-	oxygen_write_ac97(chip, 0, AC97_CENTER_LFE_MASTER, 0x8080);
-	oxygen_write_ac97(chip, 0, AC97_SURROUND_MASTER, 0x8080);
-	oxygen_ac97_clear_bits(chip, 0, 0x72, 0x0001);
-	/* power down unused ADCs and DACs */
-	oxygen_ac97_set_bits(chip, 0, AC97_POWERDOWN,
-			     AC97_PD_PR0 | AC97_PD_PR1);
-	oxygen_ac97_set_bits(chip, 0, AC97_EXTENDED_STATUS,
-			     AC97_EA_PRI | AC97_EA_PRJ | AC97_EA_PRK);
+	if (chip->has_ac97_0) {
+		oxygen_clear_bits16(chip, OXYGEN_AC97_OUT_CONFIG,
+				    OXYGEN_AC97_OUT_MAGIC3);
+		oxygen_set_bits16(chip, OXYGEN_AC97_IN_CONFIG,
+				  OXYGEN_AC97_IN_MAGIC3);
+		oxygen_write_ac97(chip, 0, AC97_RESET, 0);
+		msleep(1);
+		oxygen_ac97_set_bits(chip, 0, 0x70, 0x0300);
+		oxygen_ac97_set_bits(chip, 0, 0x64, 0x8043);
+		oxygen_ac97_set_bits(chip, 0, 0x62, 0x180f);
+		oxygen_write_ac97(chip, 0, AC97_MASTER, 0x0000);
+		oxygen_write_ac97(chip, 0, AC97_PC_BEEP, 0x8000);
+		oxygen_write_ac97(chip, 0, AC97_MIC, 0x8808);
+		oxygen_write_ac97(chip, 0, AC97_LINE, 0x0808);
+		oxygen_write_ac97(chip, 0, AC97_CD, 0x8808);
+		oxygen_write_ac97(chip, 0, AC97_VIDEO, 0x8808);
+		oxygen_write_ac97(chip, 0, AC97_AUX, 0x8808);
+		oxygen_write_ac97(chip, 0, AC97_REC_GAIN, 0x8000);
+		oxygen_write_ac97(chip, 0, AC97_CENTER_LFE_MASTER, 0x8080);
+		oxygen_write_ac97(chip, 0, AC97_SURROUND_MASTER, 0x8080);
+		oxygen_ac97_clear_bits(chip, 0, 0x72, 0x0001);
+		/* power down unused ADCs and DACs */
+		oxygen_ac97_set_bits(chip, 0, AC97_POWERDOWN,
+				     AC97_PD_PR0 | AC97_PD_PR1);
+		oxygen_ac97_set_bits(chip, 0, AC97_EXTENDED_STATUS,
+				     AC97_EA_PRI | AC97_EA_PRJ | AC97_EA_PRK);
+	}
 }
 
 static void oxygen_card_free(struct snd_card *card)