Date: Fri, 16 Sep 2022 14:31:45 -0700 From: Christopher Bowman <crb@chrisbowman.com> To: hackers@freebsd.org Subject: Controller timeout in SDHCI Message-ID: <6F53CEFE-E4CC-452B-A64C-F312A550C40F@chrisbowman.com>
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I am working on a Xilinx ZYNQ (ARM cortex A9) based board. I have a = 13.0 setup working but my freshly build 13.1 doesn=E2=80=99t boot. Upon boot while probing and attaching devices I get the following = message which=20 sdhci_fdt0-slot0: Controller timeout sdhci_fdt0-slot0: =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D REGISTER = DUMP =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D sdhci_fdt0-slot0: Sys addr: 0x00060000 | Version: 0x00008901 sdhci_fdt0-slot0: Blk size: 0x00005008 | Blk cnt: 0x00000001 sdhci_fdt0-slot0: Argument: 0x00000000 | Trn mode: 0x00000013 sdhci_fdt0-slot0: Present: 0x01ff0202 | Host ctl: 0x00000001 sdhci_fdt0-slot0: Power: 0x0000000f | Blk gap: 0x00000000 sdhci_fdt0-slot0: Wake-up: 0x00000000 | Clock: 0x00004007 sdhci_fdt0-slot0: Timeout: 0x00000006 | Int stat: 0x00000001 sdhci_fdt0-slot0: Int enab: 0x01ff00fb | Sig enab: 0x01ff00fa sdhci_fdt0-slot0: AC12 err: 0x00000000 | Host ctl2:0x00000000 sdhci_fdt0-slot0: Caps: 0x69ec0080 | Caps2: 0x00000000 sdhci_fdt0-slot0: Max curr: 0x00000001 | ADMA err: 0x00000000 sdhci_fdt0-slot0: ADMA addr:0x00000000 | Slot int: 0x00000000 sdhci_fdt0-slot0: =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D This whole section repeats and the only register which seems to change = is the Sys addr which goes to 0. I imagine that the interrupt which signals a completion of a SDHCI read = is probably not getting back to the driver and thus the timeout triggers = but I=E2=80=99m not sure. I believe the FDT for the working and 13.0 and the failing 13.1 are = identical. If anyone has any suggestions as to where to start looking that would be = greatly appreciated. Regards, Christopher=
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