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|
\ *****************************************************************************
\ * Copyright (c) 2004, 2008 IBM Corporation
\ * All rights reserved.
\ * This program and the accompanying materials
\ * are made available under the terms of the BSD License
\ * which accompanies this distribution, and is available at
\ * http://www.opensource.org/licenses/bsd-license.php
\ *
\ * Contributors:
\ * IBM Corporation - initial implementation
\ ****************************************************************************/
\ AMD 8111 I/O hub.
\ See the documentation at http://www.amd.com ; the datasheet for this chip is
\ document #24674.
\ Config space access functions - we're touching multiple device numbers and
\ device functions below, so we've got to add our own my-space base here:
: config-b@ dup 1000 < IF my-space + THEN config-b@ ;
: config-w@ dup 1000 < IF my-space + THEN config-w@ ;
: config-l@ dup 1000 < IF my-space + THEN config-l@ ;
: config-b! dup 1000 < IF my-space + THEN config-b! ;
: config-w! dup 1000 < IF my-space + THEN config-w! ;
: config-l! dup 1000 < IF my-space + THEN config-l! ;
\ First, some master config. Not all of this logically belongs to just
\ one function, and certainly not to the LPC bridge; also, we'll
\ initialize all functions in "downstream" order, and this code has to be
\ run first. So do it now.
00 842 config-b! \ Disable 8237 & 8254 & 8259's. We're not a PC.
u3? IF
80 847 config-b! \ Disable EHCI, as it is terminally broken.
THEN
03 848 config-b! \ Enable LPC, IDE; disable I2C, SMM, AC'97 functions.
01 849 config-b! \ Enable USB, disable 100Mb enet.
01 84b config-b! \ Enable IO-APIC.
fec00000 s" ioapic.fs" included
00 init-ioapic
\ Program PNPIRQ[0,1,2] as IRQ #D,E,F; switch those GPIOs to low-active.
0b 848 config-b! \ enable devB:3
7000 b58 config-l! \ map PMxx at pci i/o 7000
d1 b41 config-b! \ enable access to PMxx space
\ on JS20 the planar id is encoded in GPIO 29, 30 and 31
\ >=5 is GA2 else it is GA1
: (planar-id) ( -- planar-id)
[ 70dd io-c@ 5 rshift 1 and ] LITERAL
[ 70de io-c@ 5 rshift 2 and ] LITERAL
[ 70df io-c@ 5 rshift 4 and ] LITERAL
+ + 7 xor
;
u3? IF ['] (planar-id) to planar-id THEN
8 70d3 io-c! 8 70d4 io-c! 8 70d5 io-c! \ set the pins to low-active
bimini? IF 5 70c4 io-c! THEN \ on bimini set gpio4 as output and high to power up USB
fec b44 config-w! \ set PNPIRQ pnpirq2 -> f , pnpirq1 -> e pnpirq0 -> c
51 b41 config-b! \ disable access to PMxx space
03 848 config-b! \ disable devB:3
\ The function of the PCI controller BARs change depending on the mode the
\ controller is in.
\ And the default is legacy mode. Gross.
05 909 config-b! \ Enable native PCI mode.
03 940 config-b! \ Enable both ports.
\ Enable HPET on 8111, at address fe000000.
fe000001 8a0 config-l!
: >hpet fe000000 + ;
: hpet@ >hpet rl@-le ;
: hpet! >hpet rl!-le ;
INCLUDE freq.fs
\ Disable HPET.
0 8a0 config-l!
\ 8111 has only 16 bits of PCI I/O space. Get the address in range.
8000 next-pci-io !
\ before disabling EHCI it needs to be reset
\ first we are setting up the BAR0, so that we can talk to the
\ memory mapped controller; not using the PCI scan because we just
\ want a temporary setup
: really-disable-broken-amd8111-ehci ( -- )
\ this word only works on U4 systems (JS21/Bimini)
\ yeah, hardcoded!
f2000000 to puid
\ the PCI scan would assign pci-next-mmio to that device
\ let's just take that address
pci-next-mmio @ 100000 #aligned
\ pci-bus-number 10 lshift 210 or could be something like 70210
\ 7: pci-bus-number
\ 2: device function
\ 10: offset 10 (bar 0)
pci-bus-number 10 lshift 210 or rtas-config-l!
\ enable memory space
pci-bus-number 10 lshift 204 or dup rtas-config-l@ 2 or swap rtas-config-l!
pci-next-mmio @ 100000 #aligned ( base )
\ Sequence prescribed for resetting the EHCI contoller
\ If Run/Stop bit (ECAP30 bit 0) is 1
\ Set Run/Stop bit to 0
\ wait 2ms
dup 30 + rl@ 1 and 1 = IF
dup 30 + rl@ 1 or
over 30 + rl!
2 ms
THEN
\ While HCHalted bit (ECAP34 bit 12) is 0 (still running, wait forever)
\ wait 2ms
BEGIN dup 34 + rl@ 1000 and 0= 2 ms UNTIL
\ Set HCReset bit (ECAP30 bit 1)
dup 30 + 2 swap rl!
\ While HCReset bit is 1 (wait forever for reset to complete)
\ wait 2ms
BEGIN dup 30 + rl@ 2 and 0= 2 ms UNTIL drop
\ now it is really disabled
\ disable memory space access again
2100000 pci-bus-number 10 lshift 204 or rtas-config-l!
80 847 config-b! \ Disable EHCI, as it is terminally broken.
;
my-space pci-class-name type cr
\ copied from pci-properties.fs and pci-scan.fs
\ changed to disable the EHCI completely just before the scan
\ and after mem/IO transactions have been enabled
\ Setup the Base and Limits in the Bridge
\ and scan the bus(es) beyond that Bridge
: pci-bridge-probe-amd8111 ( addr -- )
dup pci-bridge-set-bases \ SetUp all Base Registers
pci-bus-number 1+ TO pci-bus-number \ increase number of busses found
pci-device-vec-len 1+ TO pci-device-vec-len \ increase the device-slot vector depth
dup \ stack config-addr for pci-bus!
FF swap \ Subordinate Bus Number ( for now to max to open all subbusses )
pci-bus-number swap \ Secondary Bus Number ( the new busnumber )
dup pci-addr2bus swap \ Primary Bus Number ( the current bus )
pci-bus! \ and set them into the bridge
pci-enable \ enable mem/IO transactions
\ at this point we can talk to the broken EHCI controller
really-disable-broken-amd8111-ehci
dup pci-bus-scnd@ func-pci-probe-bus \ and probe the secondary bus
dup pci-bus-number swap pci-bus-subo! \ set SubOrdinate Bus Number to current number of busses
pci-device-vec-len 1- TO pci-device-vec-len \ decrease the device-slot vector depth
dup pci-bridge-set-limits \ SetUp all Limit Registers
drop \ forget the config-addr
;
\ used to set up all unknown Bridges.
\ If a Bridge has no special handling for setup
\ the device file (pci-bridge_VENDOR_DEVICE.fs) can call
\ this word to setup busses and scan beyond.
: pci-bridge-generic-setup-amd8111 ( addr -- )
pci-device-slots >r \ save the slot array on return stack
dup pci-common-props \ set the common properties before scanning the bus
s" pci" device-type \ the type is allways "pci"
dup pci-bridge-probe-amd8111 \ find all device connected to it
dup assign-all-bridge-bars \ set up all memory access BARs
dup pci-set-irq-line \ set the interrupt pin
dup pci-set-capabilities \ set up the capabilities
pci-bridge-props \ and generate all properties
r> TO pci-device-slots \ and reset the slot array
;
: amd8111-bridge-setup
my-space
u3? takeover? or IF
\ if it is js20 or we are coming from takeover
\ we just do the normal setup
pci-bridge-generic-setup
ELSE
pci-bridge-generic-setup-amd8111
THEN
s" pci" device-name
;
amd8111-bridge-setup
|
