[ALSA] emu10k1: Add Audio capture support for Audigy 2 ZS Notebook.
Implement functionallity in order to fixe ALSA bug#2058.
Signed-off-by: James Courtier-Dutton <James@superbug.co.uk>
Signed-off-by: Jaroslav Kysela <perex@suse.cz>
diff --git a/sound/pci/emu10k1/io.c b/sound/pci/emu10k1/io.c
index 27ab7d1..116e1c8 100644
--- a/sound/pci/emu10k1/io.c
+++ b/sound/pci/emu10k1/io.c
@@ -30,6 +30,7 @@
#include <sound/core.h>
#include <sound/emu10k1.h>
#include <linux/delay.h>
+#include "p17v.h"
unsigned int snd_emu10k1_ptr_read(struct snd_emu10k1 * emu, unsigned int reg, unsigned int chn)
{
@@ -167,6 +168,64 @@
return 0;
}
+/* The ADC does not support i2c read, so only write is implemented */
+int snd_emu10k1_i2c_write(struct snd_emu10k1 *emu,
+ u32 reg,
+ u32 value)
+{
+ u32 tmp;
+ int timeout = 0;
+ int status;
+ int retry;
+ if ((reg > 0x7f) || (value > 0x1ff)) {
+ snd_printk(KERN_ERR "i2c_write: invalid values.\n");
+ return -EINVAL;
+ }
+
+ tmp = reg << 25 | value << 16;
+ // snd_printk("I2C-write:reg=0x%x, value=0x%x\n", reg, value);
+ /* Not sure what this I2C channel controls. */
+ /* snd_emu10k1_ptr_write(emu, P17V_I2C_0, 0, tmp); */
+
+ /* This controls the I2C connected to the WM8775 ADC Codec */
+ snd_emu10k1_ptr20_write(emu, P17V_I2C_1, 0, tmp);
+ tmp = snd_emu10k1_ptr20_read(emu, P17V_I2C_1, 0); /* write post */
+
+ for (retry = 0; retry < 10; retry++) {
+ /* Send the data to i2c */
+ //tmp = snd_emu10k1_ptr_read(emu, P17V_I2C_ADDR, 0);
+ //tmp = tmp & ~(I2C_A_ADC_READ|I2C_A_ADC_LAST|I2C_A_ADC_START|I2C_A_ADC_ADD_MASK);
+ tmp = 0;
+ tmp = tmp | (I2C_A_ADC_LAST|I2C_A_ADC_START|I2C_A_ADC_ADD);
+ snd_emu10k1_ptr20_write(emu, P17V_I2C_ADDR, 0, tmp);
+
+ /* Wait till the transaction ends */
+ while (1) {
+ udelay(10);
+ status = snd_emu10k1_ptr20_read(emu, P17V_I2C_ADDR, 0);
+ // snd_printk("I2C:status=0x%x\n", status);
+ timeout++;
+ if ((status & I2C_A_ADC_START) == 0)
+ break;
+
+ if (timeout > 1000) {
+ snd_printk("emu10k1:I2C:timeout status=0x%x\n", status);
+ break;
+ }
+ }
+ //Read back and see if the transaction is successful
+ if ((status & I2C_A_ADC_ABORT) == 0)
+ break;
+ }
+
+ if (retry == 10) {
+ snd_printk(KERN_ERR "Writing to ADC failed!\n");
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
int snd_emu1010_fpga_write(struct snd_emu10k1 * emu, int reg, int value)
{
if (reg < 0 || reg > 0x3f)