Peter, On Wednesday 28 May 2008 01:03, Peter Wurmsdobler wrote: > > does anybody understand the DAM unit in the i.MX27 processor? > > Not that I really understand the AUDMUX unit, but the current Freescale > BSP (19 Dec 2007) contains an audio/alsa driver which makes use of the > AUDMUX, or DAM, in order to route audio streams to/from the mx27's SSI1 > and SSI2 to the PMIC's SSIs. PMIC is a the power management and audio > chip which is on the ADS board. Unfortunately I do not have the file > with me, it is called ./sound/arm/mxc-pmic-alsa.c I believe. > > I will be back in office next week, maybe we can have a chat then, if it > is not too late. Yes, I know this file. And I'm using the code from this file to setup my DAM hardware. But I'm not sure if I connect the right ports in the right way to each other. My external PMIC is connected to the processor's SSI1_* pins. And it provides i2s clock and frame signal. But the internal SSI unit does not send any data, so I believe it does not get these signals from the PMIC. BTW: The last instruction in the DAM code in sound/arm/mxc-pmic-alsa.c is: writel(AUD_MUX_CONF, IO_ADDRESS(AUDMUX_BASE_ADDR) + 0x38); but the last valid register in the DAM unit is at AUDMUX_BASE_ADDR + 0x1C.... Juergen -- Dipl.-Ing. Juergen Beisert | http://www.pengutronix.de Pengutronix - Linux Solutions for Science and Industry Handelsregister: Amtsgericht Hildesheim, HRA 2686 Vertretung Sued/Muenchen, Germany Phone: +49-8766-939 228 | Fax: +49-5121-206917-9 _______________________________________________ Alsa-devel mailing list Alsa-devel@xxxxxxxxxxxxxxxx http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
