Hi,
I have mcbsp1 working on an external codec. I moved the wires to the
mcbsp3 pins. The codec is master, using tdm mode. I use the same codec
i2s bus, and it gets the same setup (I change the dai-link stuff in my
alsa machine driver to use the other omap i2s bus for my tests). If I
pull the clk wire off the beagleboard pin, the clock from the codec
looks good. With the wire attached to the pin, I don't see the pin
wiggling. So it looks like maybe the pin is an output or something. The
frame clock looks ok while connected.
In the board-omap3beagle.c I configure all 3 mcbsp the same way:
#ifdef CONFIG_OMAP_MUX
static struct omap_board_mux board_mux[] __initdata = {
#if 1
/* McBSP 1 slave */
OMAP3_MUX(MCBSP1_FSX, OMAP_MUX_MODE0 | OMAP_PIN_INPUT),
OMAP3_MUX(MCBSP1_CLKX, OMAP_MUX_MODE0 | OMAP_PIN_INPUT),
OMAP3_MUX(MCBSP1_DR, OMAP_MUX_MODE0 | OMAP_PIN_INPUT),
OMAP3_MUX(MCBSP1_DX, OMAP_MUX_MODE0 | OMAP_PIN_OUTPUT),
#else
/* McBSP 1 master */
OMAP3_MUX(MCBSP1_FSX, OMAP_MUX_MODE0 | OMAP_PIN_OUTPUT),
OMAP3_MUX(MCBSP1_CLKX, OMAP_MUX_MODE0 | OMAP_PIN_OUTPUT),
OMAP3_MUX(MCBSP1_DR, OMAP_MUX_MODE0 | OMAP_PIN_INPUT),
OMAP3_MUX(MCBSP1_DX, OMAP_MUX_MODE0 | OMAP_PIN_OUTPUT),
#endif
#if 1
/* McBSP 2 slave */
OMAP3_MUX(MCBSP2_FSX, OMAP_MUX_MODE0 | OMAP_PIN_INPUT),
OMAP3_MUX(MCBSP2_CLKX, OMAP_MUX_MODE0 | OMAP_PIN_INPUT),
OMAP3_MUX(MCBSP2_DR, OMAP_MUX_MODE0 | OMAP_PIN_INPUT),
OMAP3_MUX(MCBSP2_DX, OMAP_MUX_MODE0 | OMAP_PIN_OUTPUT),
#else
/* McBSP 2 master */
OMAP3_MUX(MCBSP2_FSX, OMAP_MUX_MODE0 | OMAP_PIN_OUTPUT),
OMAP3_MUX(MCBSP2_CLKX, OMAP_MUX_MODE0 | OMAP_PIN_OUTPUT),
OMAP3_MUX(MCBSP2_DR, OMAP_MUX_MODE0 | OMAP_PIN_INPUT),
OMAP3_MUX(MCBSP2_DX, OMAP_MUX_MODE0 | OMAP_PIN_OUTPUT),
#endif
#if 1
/* McBSP 3 slave */
OMAP3_MUX(MCBSP3_FSX, OMAP_MUX_MODE0 | OMAP_PIN_INPUT),
OMAP3_MUX(MCBSP3_CLKX, OMAP_MUX_MODE0 | OMAP_PIN_INPUT),
OMAP3_MUX(MCBSP3_DR, OMAP_MUX_MODE0 | OMAP_PIN_INPUT),
OMAP3_MUX(MCBSP3_DX, OMAP_MUX_MODE0 | OMAP_PIN_OUTPUT),
#else
/* McBSP 3 master */
OMAP3_MUX(MCBSP3_FSX, OMAP_MUX_MODE0 | OMAP_PIN_OUTPUT),
OMAP3_MUX(MCBSP3_CLKX, OMAP_MUX_MODE0 | OMAP_PIN_OUTPUT),
OMAP3_MUX(MCBSP3_DR, OMAP_MUX_MODE0 | OMAP_PIN_INPUT),
OMAP3_MUX(MCBSP3_DX, OMAP_MUX_MODE0 | OMAP_PIN_OUTPUT),
#endif
{ .reg_offset = OMAP_MUX_TERMINATOR },
};
#endif
So far I have not been able to get the codec mastered bit clock to work
on either mcbsp2 or msbsp3.
I have been trying to follow the logic in mcbsp.c and in omap-mcbsp.c in
how things get inited. I suspect there is something I have not done?
Any ideas.
Thanks, Steve
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