[ALSA] Implement support for Line-in capture on SB Live 24bit.

CA0106 driver
Notes: MIC capture not tested yet.

Signed-off-by: James Courtier-Dutton <James@superbug.co.uk>

1 files changed, 66 insertions, 4 deletions

diff --git a/sound/pci/ca0106/ca0106_main.c b/sound/pci/ca0106/ca0106_main.c
index a56e68ea87b..58d9026c8ca 100644
--- a/sound/pci/ca0106/ca0106_main.c
+++ b/sound/pci/ca0106/ca0106_main.c
@@ -1,7 +1,7 @@
 /*
  *  Copyright (c) 2004 James Courtier-Dutton <James@superbug.demon.co.uk>
  *  Driver CA0106 chips. e.g. Sound Blaster Audigy LS and Live 24bit
- *  Version: 0.0.22
+ *  Version: 0.0.23
  *
  *  FEATURES currently supported:
  *    Front, Rear and Center/LFE.
@@ -77,6 +77,8 @@
  *    Add SPDIF capture using optional digital I/O module for SB Live 24bit. (Analog capture does not yet work.)
  *  0.0.22
  *    Add support for MSI K8N Diamond Motherboard with onboard SB Live 24bit without AC97. From kiksen, bug #901
+ *  0.0.23
+ *    Implement support for Line-in capture on SB Live 24bit.
  *
  *  BUGS:
  *    Some stability problems when unloading the snd-ca0106 kernel module.
@@ -173,15 +175,18 @@ static ca0106_details_t ca0106_chip_details[] = {
 	 /* New Sound Blaster Live! 7.1 24bit. This does not have an AC97. 53SB041000001 */
 	 { .serial = 0x10061102,
 	   .name   = "Live! 7.1 24bit [SB0410]",
-	   .gpio_type = 1 } ,
+	   .gpio_type = 1,
+	   .i2c_adc = 1 } ,
 	 /* New Dell Sound Blaster Live! 7.1 24bit. This does not have an AC97.  */
 	 { .serial = 0x10071102,
 	   .name   = "Live! 7.1 24bit [SB0413]",
-	   .gpio_type = 1 } ,
+	   .gpio_type = 1,
+	   .i2c_adc = 1 } ,
 	 /* MSI K8N Diamond Motherboard with onboard SB Live 24bit without AC97 */
 	 { .serial = 0x10091462,
 	   .name   = "MSI K8N Diamond MB [SB0438]",
-	   .gpio_type = 1 } ,
+	   .gpio_type = 1,
+	   .i2c_adc = 1 } ,
 	 { .serial = 0,
 	   .name   = "AudigyLS [Unknown]" }
 };
@@ -257,6 +262,59 @@ void snd_ca0106_ptr_write(ca0106_t *emu,
 	spin_unlock_irqrestore(&emu->emu_lock, flags);
 }
 
+int snd_ca0106_i2c_write(ca0106_t *emu,
+				u32 reg,
+				u32 value)
+{
+	u32 tmp;
+	int timeout=0;
+	int status;
+	int retry;
+	if ((reg > 0x7f) || (value > 0x1ff))
+	{
+                snd_printk("i2c_write: invalid values.\n");
+		return -EINVAL;
+	}
+
+	tmp = reg << 25 | value << 16;
+	snd_ca0106_ptr_write(emu, I2C_D0, 0, tmp);
+	snd_ca0106_ptr_write(emu, I2C_D1, 0, tmp);
+
+	for(retry=0;retry<10;retry++)
+	{
+		/* Send the data to i2c */
+		tmp = snd_ca0106_ptr_read(emu, I2C_A, 0);
+		tmp = tmp & ~(I2C_A_ADC_READ|I2C_A_ADC_LAST|I2C_A_ADC_START|I2C_A_ADC_ADD_MASK);
+		tmp = tmp | (I2C_A_ADC_LAST|I2C_A_ADC_START|I2C_A_ADC_ADD);
+		snd_ca0106_ptr_write(emu, I2C_A, 0, tmp);
+
+		/* Wait till the transaction ends */
+		while(1)
+		{
+			status = snd_ca0106_ptr_read(emu, I2C_A, 0);
+                	//snd_printk("I2C:status=0x%x\n", status);
+			timeout++;
+			if((status & I2C_A_ADC_START)==0)
+				break;
+
+			if(timeout>1000)
+				break;
+		}
+		//Read back and see if the transaction is successful
+		if((status & I2C_A_ADC_ABORT)==0)
+			break;
+	}
+
+	if(retry==10)
+	{
+                snd_printk("Writing to ADC failed!\n");
+		return -EINVAL;
+	}
+    
+    	return 0;
+}
+
+
 static void snd_ca0106_intr_enable(ca0106_t *emu, unsigned int intrenb)
 {
 	unsigned long flags;
@@ -1177,6 +1235,10 @@ static int __devinit snd_ca0106_create(snd_card_t *card,
 	//outl(0x00000009, chip->port+HCFG);
 	outl(HCFG_AC97 | HCFG_AUDIOENABLE, chip->port+HCFG); /* AC97 2.0, Enable outputs. */
 
+        if (chip->details->i2c_adc == 1) { /* The SB0410 and SB0413 use I2C to control ADC. */
+	        snd_ca0106_i2c_write(chip, ADC_MUX, ADC_MUX_LINEIN); /* Enable Line-in capture. MIC in currently untested. */
+	}
+
 	if ((err = snd_device_new(card, SNDRV_DEV_LOWLEVEL,
 				  chip, &ops)) < 0) {
 		snd_ca0106_free(chip);