+int snd_ca0106_spi_write(struct snd_ca0106 * emu,
+ unsigned int data)
+{
+ unsigned int reset, set;
+ unsigned int reg, tmp;
+ int n, result;
+ reg = SPI;
+ if (data > 0xffff) /* Only 16bit values allowed */
+ return 1;
+ tmp = snd_ca0106_ptr_read(emu, reg, 0);
+ reset = (tmp & ~0x3ffff) | 0x20000; /* Set xxx20000 */
+ set = reset | 0x10000; /* Set xxx1xxxx */
+ snd_ca0106_ptr_write(emu, reg, 0, reset | data);
+ tmp = snd_ca0106_ptr_read(emu, reg, 0); /* write post */
+ snd_ca0106_ptr_write(emu, reg, 0, set | data);
+ result = 1;
+ /* Wait for status bit to return to 0 */
+ for (n = 0; n < 100; n++) {
+ udelay(10);
+ tmp = snd_ca0106_ptr_read(emu, reg, 0);
+ if (!(tmp & 0x10000)) {
+ result = 0;
+ break;
+ }
+ }
+ if (result) /* Timed out */
+ return 1;
+ snd_ca0106_ptr_write(emu, reg, 0, reset | data);
+ tmp = snd_ca0106_ptr_read(emu, reg, 0); /* Write post */
+ return 0;
+}
+
+/* The ADC does not support i2c read, so only write is implemented */
+int snd_ca0106_i2c_write(struct snd_ca0106 *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_ca0106_ptr_write(emu, I2C_D0, 0, tmp); */
+
+ /* This controls the I2C connected to the WM8775 ADC Codec */
+ 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 = 0;
+ 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(KERN_ERR "Writing to ADC failed!\n");
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+
+static void snd_ca0106_intr_enable(struct snd_ca0106 *emu, unsigned int intrenb)