Module Name: src
Committed By: macallan
Date: Fri Jan 31 06:05:00 UTC 2020
Added Files:
src/sys/arch/sparc64/doc: SunFire_v210.txt
Log Message:
document what I found out about the v210's i2c GPIOs.
To generate a diff of this commit:
cvs rdiff -u -r0 -r1.1 src/sys/arch/sparc64/doc/SunFire_v210.txt
Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.
Added files:
Index: src/sys/arch/sparc64/doc/SunFire_v210.txt
diff -u /dev/null src/sys/arch/sparc64/doc/SunFire_v210.txt:1.1
--- /dev/null Fri Jan 31 06:05:00 2020
+++ src/sys/arch/sparc64/doc/SunFire_v210.txt Fri Jan 31 06:05:00 2020
@@ -0,0 +1,47 @@
+This is about the i2c GPIO chips found in the Sun Fire v210, starting at
+/pci/isa@7/i2c@0,320/gpio@0,44
+Input/Output assignments and levels are what the firmware leaves us with -
+all LEDs off except the power one.
+
+All known pin functions were determined by experiment. No idea what the
+undocumented pins do, if anything.
+
+[ 1.000000] pcagpio0 at iic0 addr 0x22: PCA9555
+[ 1.000000] dir: I-IIIIIIIIIIIIII
+[ 1.000000] lvl: X XXXX XXX XXXX
+[ 1.000000] dir: -O--------------
+[ 1.000000] lvl: X
+ ^
+0x0400 clears when the case is open
+
+[ 1.000000] pcagpio1 at iic0 addr 0x23: PCA9555
+[ 1.000000] dir: ------IIIIIIIIII
+[ 1.000000] lvl: XXXXXXXX
+[ 1.000000] dir: OOOOOO----------
+[ 1.000000] lvl: XXXXXX
+Bit 0x0002 gets set when bay 1 is empty, I would assume 0x0001 is for bay 0.
+The output bits seem to control the drive bay LEDs
+0x2000 - bay 1, blue LED
+0x1000 - bay 0, blue LED
+0x0800 - bay 1, both LEDs orange
+0x0400 - bay 0, both LEDs orange
+all low active, the remaining outputs don't seem to do anything.
+
+[ 1.000000] pcagpio2 at iic0 addr 0x34: PCA9555
+[ 1.000000] dir: --II----IIIIIIII
+[ 1.000000] lvl: X XXXXXXXX
+[ 1.000000] dir: OO--OOOO--------
+[ 1.000000] lvl: XX XXXX
+clearing 0x0300 reset the machine
+probably controls redundant / hot-swappable power supplies on v240.
+
+[ 1.000000] pcagpio3 at iic0 addr 0x38: PCA9556
+[ 1.000000] dir: ----------------
+[ 1.000000] lvl:
+[ 1.000000] dir: OOOOOOOOOOOOOOOO
+[ 1.000000] lvl: XXX XXXX
+This controls the front panel LEDs
+0x80 - indicator LED
+0x20 - fault LED
+0x10 - power LED
+all low active, the remaining outputs don't seem to do anything.
