Not sure from your last couple posts if you got this rockin' yet or not, but there's two alsa devices. If I just run alsamixer, I get:

Card: Alsa-DSP external ctl plugin
Chip: ALSA-DSP plugin Mixer

which has only one (PCM) control.
But alsamixer -c0 gives:

Card: OMAP24xx EAC
Chip: TSC2301

which has all the controls, as seen in gnome-alsamixer.
BTW, thanks for the link on the TSC2301; I might actually figure out what soem of the more obscure toggles are. (OT: No luck on that yet, but check p. 71 in the data sheet; we have a hardware equalizer just waiting for IIR coefficients to be loaded into it...)

(For the record:

• BT+BTM = HSP
• EACPCM+Headset Amplifier = 1/8" jack
• EACPCM+Speaker Amplifier = speakers

These all work in any combination, but I'm not sure on the others. I think BTM2PCM routes HSP mic to speakers+1/8" jack...)