[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>

3 files changed, 148 insertions, 10 deletions

diff --git a/sound/pci/ca0106/ca0106.h b/sound/pci/ca0106/ca0106.h
index c623858428cd..67e56a530b22 100644
--- a/sound/pci/ca0106/ca0106.h
+++ b/sound/pci/ca0106/ca0106.h
@@ -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: 0.0.20
+ *  Version: 0.0.21
  *
  *  FEATURES currently supported:
  *    See ca0106_main.c for features.
@@ -45,6 +45,8 @@
  *    Added I2C and SPI registers. Filled in interrupt enable.
  *  0.0.20
  *    Added GPIO info for SB Live 24bit.
+ *  0.0.21
+ *   Implement support for Line-in capture on SB Live 24bit.
  *
  *
  *  This code was initally based on code from ALSA's emu10k1x.c which is:
@@ -475,9 +477,56 @@
                                                 /* Causes interrupts based on timer intervals. */
 #define SPI                     0x7a            /* SPI: Serial Interface Register */
 #define I2C_A                   0x7b            /* I2C Address. 32 bit */
-#define I2C_0                   0x7c            /* I2C Data Port 0. 32 bit */
-#define I2C_1                   0x7d            /* I2C Data Port 1. 32 bit */
-
+#define I2C_D0                  0x7c            /* I2C Data Port 0. 32 bit */
+#define I2C_D1                  0x7d            /* I2C Data Port 1. 32 bit */
+//I2C values
+#define I2C_A_ADC_ADD_MASK      0x000000fe      //The address is a 7 bit address
+#define I2C_A_ADC_RW_MASK       0x00000001      //bit mask for R/W
+#define I2C_A_ADC_TRANS_MASK    0x00000010      //Bit mask for I2c address DAC value
+#define I2C_A_ADC_ABORT_MASK    0x00000020      //Bit mask for I2C transaction abort flag
+#define I2C_A_ADC_LAST_MASK     0x00000040      //Bit mask for Last word transaction
+#define I2C_A_ADC_BYTE_MASK     0x00000080      //Bit mask for Byte Mode
+
+#define I2C_A_ADC_ADD           0x00000034      //This is the Device address for ADC 
+#define I2C_A_ADC_READ          0x00000001      //To perform a read operation
+#define I2C_A_ADC_START         0x00000100      //Start I2C transaction
+#define I2C_A_ADC_ABORT         0x00000200      //I2C transaction abort
+#define I2C_A_ADC_LAST          0x00000400      //I2C last transaction
+#define I2C_A_ADC_BYTE          0x00000800      //I2C one byte mode
+
+#define I2C_D_ADC_REG_MASK      0xfe000000      //ADC address register 
+#define I2C_D_ADC_DAT_MASK      0x01ff0000      //ADC data register
+
+#define ADC_TIMEOUT             0x00000007      //ADC Timeout Clock Disable
+#define ADC_IFC_CTRL            0x0000000b      //ADC Interface Control
+#define ADC_MASTER              0x0000000c      //ADC Master Mode Control
+#define ADC_POWER               0x0000000d      //ADC PowerDown Control
+#define ADC_ATTEN_ADCL          0x0000000e      //ADC Attenuation ADCL
+#define ADC_ATTEN_ADCR          0x0000000f      //ADC Attenuation ADCR
+#define ADC_ALC_CTRL1           0x00000010      //ADC ALC Control 1
+#define ADC_ALC_CTRL2           0x00000011      //ADC ALC Control 2
+#define ADC_ALC_CTRL3           0x00000012      //ADC ALC Control 3
+#define ADC_NOISE_CTRL          0x00000013      //ADC Noise Gate Control
+#define ADC_LIMIT_CTRL          0x00000014      //ADC Limiter Control
+#define ADC_MUX                 0x00000015      //ADC Mux offset
+
+#if 0
+/* FIXME: Not tested yet. */
+#define ADC_GAIN_MASK           0x000000ff      //Mask for ADC Gain
+#define ADC_ZERODB              0x000000cf      //Value to set ADC to 0dB
+#define ADC_MUTE_MASK           0x000000c0      //Mask for ADC mute
+#define ADC_MUTE                0x000000c0      //Value to mute ADC
+#define ADC_OSR                 0x00000008      //Mask for ADC oversample rate select
+#define ADC_TIMEOUT_DISABLE     0x00000008      //Value and mask to disable Timeout clock
+#define ADC_HPF_DISABLE         0x00000100      //Value and mask to disable High pass filter
+#define ADC_TRANWIN_MASK        0x00000070      //Mask for Length of Transient Window
+#endif
+
+#define ADC_MUX_MASK            0x0000000f      //Mask for ADC Mux
+#define ADC_MUX_MIC             0x00000002      //Value to select Mic at ADC Mux
+#define ADC_MUX_LINEIN          0x00000004      //Value to select LineIn at ADC Mux
+#define ADC_MUX_PHONE           0x00000001      //Value to select TAD at ADC Mux (Not used)
+#define ADC_MUX_AUX             0x00000008      //Value to select Aux at ADC Mux
 
 #define SET_CHANNEL 0  /* Testing channel outputs 0=Front, 1=Center/LFE, 2=Unknown, 3=Rear */
 #define PCM_FRONT_CHANNEL 0
@@ -513,6 +562,7 @@ typedef struct {
         char * name;
         int ac97;
         int gpio_type;
+        int i2c_adc;
 } ca0106_details_t;
 
 // definition of the chip-specific record
@@ -555,3 +605,6 @@ void snd_ca0106_ptr_write(ca0106_t *emu,
                                    unsigned int chn, 
                                    unsigned int data);
 
+int snd_ca0106_i2c_write(ca0106_t *emu, u32 reg, u32 value);
+
+
diff --git a/sound/pci/ca0106/ca0106_main.c b/sound/pci/ca0106/ca0106_main.c
index a56e68ea87bc..58d9026c8ca6 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);
diff --git a/sound/pci/ca0106/ca0106_proc.c b/sound/pci/ca0106/ca0106_proc.c
index 3e5161a32363..1c9cc821d1b9 100644
--- a/sound/pci/ca0106/ca0106_proc.c
+++ b/sound/pci/ca0106/ca0106_proc.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: 0.0.17
+ *  Version: 0.0.18
  *
  *  FEATURES currently supported:
  *    See ca0106_main.c for features.
@@ -39,7 +39,9 @@
  *    Modified Copyright message.
  *  0.0.17
  *    Add iec958 file in proc file system to show status of SPDIF in.
- *    
+ *  0.0.18
+ *    Implement support for Line-in capture on SB Live 24bit.
+ *
  *  This code was initally based on code from ALSA's emu10k1x.c which is:
  *  Copyright (c) by Francisco Moraes <fmoraes@nc.rr.com>
  *
@@ -407,6 +409,20 @@ static void snd_ca0106_proc_reg_write(snd_info_entry_t *entry,
         }
 }
 
+static void snd_ca0106_proc_i2c_write(snd_info_entry_t *entry, 
+                                       snd_info_buffer_t * buffer)
+{
+        ca0106_t *emu = entry->private_data;
+        char line[64];
+        unsigned int reg, val;
+        while (!snd_info_get_line(buffer, line, sizeof(line))) {
+                if (sscanf(line, "%x %x", &reg, &val) != 2)
+                        continue;
+                if ((reg <= 0x7f) || (val <= 0x1ff)) {
+                        snd_ca0106_i2c_write(emu, reg, val);
+                }
+        }
+}
 
 int __devinit snd_ca0106_proc_init(ca0106_t * emu)
 {
@@ -431,6 +447,13 @@ int __devinit snd_ca0106_proc_init(ca0106_t * emu)
                 entry->mode |= S_IWUSR;
 //              entry->private_data = emu;
         }
+        if(! snd_card_proc_new(emu->card, "ca0106_i2c", &entry)) {
+                snd_info_set_text_ops(entry, emu, 1024, snd_ca0106_proc_i2c_write);
+                entry->c.text.write_size = 64;
+                entry->c.text.write = snd_ca0106_proc_i2c_write;
+                entry->mode |= S_IWUSR;
+//              entry->private_data = emu;
+        }
         if(! snd_card_proc_new(emu->card, "ca0106_regs2", &entry)) 
                 snd_info_set_text_ops(entry, emu, 1024, snd_ca0106_proc_reg_read2);
         return 0;