Hi John,
> John Youn <johnyoun@xxxxxxxxxxxx> hat am 16. November 2016 um 01:36
> geschrieben:
>
>
> The ahbcfg param for bcm2835 is specifying a HBSTLEN of 0x8 (0x10 >> 1)
> which is not a valid value for that field. Remove the param and default
> to using INCR4.
i don't have any Synopsys documentation about this IP core. But according to p.
204 of the BCM2835 datasheet [1] the register USB_GAHBCFG is different than the
other implementations:
Address 0x 7E98 0008
The USB_GAHBCFG register has been adapted. Bits [4:1] which are marked in the
Synopsys documentation as "Burst Length/Type (HBstLen)" have been used
differently.
[4] 1 = Wait for all outstanding AXI writes to complete before signalling
(internally) that
DMA is done.
0 = don't wait.
[3] Not used
[2:1] Sets the maximum AXI burst length, but the bits are inverted,
00 = maximum AXI burst length of 4,
01 = maximum AXI burst length of 3,
10 = maximum AXI burst length of 2
11 = maximum AXI burst length of 1
Did you already take care of that?
[1] -
https://www.raspberrypi.org/wp-content/uploads/2012/02/BCM2835-ARM-Peripherals.pdf
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