Detection of Audigy 2 ZS

diff -u -r1.35 emu10k1_main.c
@@ -119,8 +119,10 @@
        snd_emu10k1_ptr_write(emu, SOLEH, 0, 0);
 
        if (emu->audigy){
-               snd_emu10k1_ptr_write(emu, 0x5e, 0, 0xf00); /* ?? */
-               snd_emu10k1_ptr_write(emu, 0x5f, 0, 0x3); /* ?? */
+               /* set SPDIF bypass mode */
+               snd_emu10k1_ptr_write(emu, SPBYPASS, 0, SPBYPASS_FORMAT);
+               /* enable rear left + rear right AC97 slots */
+               snd_emu10k1_ptr_write(emu, AC97SLOT, 0, AC97SLOT_REAR_RIGHT | AC97SLOT_REAR_LEFT);
        }
 
        /* init envelope engine */

@@ -329,7 +331,7 @@
        if (emu->audigy)
                snd_emu10k1_ptr_write(emu, A_DBG, 0, A_DBG_SINGLE_STEP);
        else
-               snd_emu10k1_ptr_write(emu, DBG, 0, 0x8000);
+               snd_emu10k1_ptr_write(emu, DBG, 0, EMU10K1_DBG_SINGLE_STEP);
 
        /* disable channel interrupt */
        snd_emu10k1_ptr_write(emu, CLIEL, 0, 0);

@@ -682,12 +684,13 @@
                /* Audigy 2 EX has apparently no effective AC97 controls
                 * (for both input and output), so we skip the AC97 detections
                 */
-               snd_printdd(KERN_INFO "Audigy2 EX is detected. skpping ac97.\n");
+               snd_printdd(KERN_INFO "Audigy2 EX is detected. skipping ac97.\n");
                emu->no_ac97 = 1;
        }
 
-       if (emu->revision == 4) {
-               /*  FIXME - Audigy 2 ZS detection */
+       if (emu->revision == 4 && emu->model == 0x2002) {
+               /* Audigy 2 ZS */
+               snd_printdd(KERN_INFO "Audigy2 ZS is detected. setting 7.1 mode.\n");
                emu->spk71 = 1;
        }