Hi.
I am doing a port from ppc to powerpc ARCH on sbc8260 based board.
The problem is, that I can't get SMC1 UART to work.
After SMC console is initialized.
cpm_uart_console_write() hangs here
/* Wait for transmitter fifo to empty.
* Ready indicates output is ready, and xmt is doing
* that, not that it is ready for us to send.
*/
while ((in_be16(&bdp->cbd_sc) & BD_SC_READY) != 0)
;
I am using dts tree modified from ep8248 port since it is the only one that
has smc description in it. :
[EMAIL PROTECTED] {
compatible = "fsl,mpc8260-brg",
"fsl,cpm2-brg",
"fsl,cpm-brg";
reg = <119f0 10 115f0 10>;
clock-frequency = <135000000>;
};
/* Monitor port/SMC1 */
smc1: [EMAIL PROTECTED] {
device_type = "serial";
compatible = "fsl,mpc8260-smc-uart",
"fsl,cpm2-smc-uart";
reg = <0x11a80 0x20 0x1100 0x40>;
interrupts = <4 8>;
interrupt-parent = <&PIC>;
fsl,cpm-brg = <1>;
fsl,cpm-command = <0x1d000000>;
linux,my-label = "SMC1";
};
I checked a BRG settings against working u-boot configuration and they are the
same. Anyway a wrong BRG setting wouldn't hang this loop
So I have a few questions.
If someone has done sbc8260 dts tree and port to "powerpc" already, I'd be very
grateful if he can share it with me.
I couldn't find anything on the internet.
Can someone, also, explain, how "fsl, cpm-command" field works,
booting-without-of document doesn't provide much information.
I feel, that just copying this value from ep8248.dts isn't right somehow.
Thank you
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