[ALSA] snd-emu10k1: Removes some distortion from Audigy 2 ZS Notebook.

Modules: EMU10K1/EMU10K2 driver

Description:
Part way to fix ALSA bug#927
Add support for the SPI interface on the CA0108 chip.
This is used to control the registers on the DAC.
Headphone output tested.
Other outputs and Capture not tested yet.
Note: The red LED does not come on, but sound is still OK.

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

1 files changed, 27 insertions, 1 deletions

diff --git a/sound/pci/emu10k1/emu10k1_main.c b/sound/pci/emu10k1/emu10k1_main.c
index f8e2ccd50d60..eb093700fa71 100644
--- a/sound/pci/emu10k1/emu10k1_main.c
+++ b/sound/pci/emu10k1/emu10k1_main.c
@@ -181,7 +181,32 @@ static int snd_emu10k1_init(struct snd_emu10k1 *emu, int enable_ir, int resume)
                 tmp = inl(emu->port + A_IOCFG) & ~0x8; /* Clear bit 3 */
                 outl(tmp, emu->port + A_IOCFG);
         }
-
+        if (emu->card_capabilities->spi_dac) { /* Audigy 2 ZS Notebook with DAC Wolfson WM8768/WM8568 */
+                u32 tmp;
+                tmp = snd_emu10k1_spi_write(emu, 0x00ff);
+                tmp = snd_emu10k1_spi_write(emu, 0x02ff);
+                tmp = snd_emu10k1_spi_write(emu, 0x0400);
+                tmp = snd_emu10k1_spi_write(emu, 0x0520);
+                tmp = snd_emu10k1_spi_write(emu, 0x0600);
+                tmp = snd_emu10k1_spi_write(emu, 0x08ff);
+                tmp = snd_emu10k1_spi_write(emu, 0x0aff);
+                tmp = snd_emu10k1_spi_write(emu, 0x0cff);
+                tmp = snd_emu10k1_spi_write(emu, 0x0eff);
+                tmp = snd_emu10k1_spi_write(emu, 0x10ff);
+                tmp = snd_emu10k1_spi_write(emu, 0x1200);
+                tmp = snd_emu10k1_spi_write(emu, 0x1400);
+                tmp = snd_emu10k1_spi_write(emu, 0x1480);
+                tmp = snd_emu10k1_spi_write(emu, 0x1800);
+                tmp = snd_emu10k1_spi_write(emu, 0x1aff);
+                tmp = snd_emu10k1_spi_write(emu, 0x1cff);
+                tmp = snd_emu10k1_spi_write(emu, 0x1e00);
+                tmp = snd_emu10k1_spi_write(emu, 0x0530);
+                tmp = snd_emu10k1_spi_write(emu, 0x0602);
+                tmp = snd_emu10k1_spi_write(emu, 0x0622);
+                tmp = snd_emu10k1_spi_write(emu, 0x1400);
+                snd_emu10k1_ptr20_write(emu, 0x60, 0, 0x10);
+        }
+        
         snd_emu10k1_ptr_write(emu, PTB, 0, emu->ptb_pages.addr);
         snd_emu10k1_ptr_write(emu, TCB, 0, 0);  /* taken from original driver */
         snd_emu10k1_ptr_write(emu, TCBS, 0, 4); /* taken from original driver */
@@ -747,6 +772,7 @@ static struct snd_emu_chip_details emu_chip_details[] = {
          .emu10k2_chip = 1,
          .ca0108_chip = 1,
          .ca_cardbus_chip = 1,
+         .spi_dac = 1,
          .spk71 = 1} ,
         {.vendor = 0x1102, .device = 0x0008, 
          .driver = "Audigy2", .name = "Audigy 2 Value [Unknown]",