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This reverts commit fd6e9d3945ee122eb513ada8b17296d243c1ce5e.
Having #size-cells == 0 in a node indicates that things under the
node aren't directly accessible, and therefore we shouldn't try to
translate addresses for devices under the node into CPU physical
addresses.
Some drivers, such as the nvram driver for powermacs, rely on
of_address_to_resource failing if they are called for a node
representing a device whose resources aren't directly accessible
by the CPU. These drivers were broken by commit fd6e9d39,
resulting in the "Lombard" powerbook hanging early in the boot
process.
Signed-off-by: Paul Mackerras <paulus@samba.org>
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An mdio bus scan was added with ucc_geth phylib
migration patches, now machines complain on boot, saying:
prom_parse: Bad cell count for /qe@e0100000/mdio@2120/ethernet-phy@00
prom_parse: Bad cell count for /qe@e0100000/mdio@2120/ethernet-phy@01
since size-cells can indeed be 0, this patch fixes the check.
Signed-off-by: Kim Phillips <kim.phillips@freescale.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>
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There is no big reason to have that function inlined.
Signed-off-by: Christian Krafft <krafft@de.ibm.com>
Acked-by: Arnd Bergmann <arnd.bergmann@de.ibm.com>
Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
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In the powerpc architecture, of_irq_to_resource, currently sitting in
prom.h, needs irq_of_parse_and_map and NO_IRQ from asm-powerpc/irq.h.
The solution suggested by Benjamin Herrenschmidt is to move it to
arch/powerpc/kernel/prom_parse.c.
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
Signed-off-by: Paul Mackerras <paulus@samba.org>
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Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
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This is more consistent and gets us closer to the Sparc code.
Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Paul Mackerras <paulus@samba.org>
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This is more consistent and gets us closer to the Sparc code.
Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Paul Mackerras <paulus@samba.org>
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This function spews a warning due to possible use of an uninitialized
variable. This can happen on broken device-trees or when called with
a NULL argument. Makes ure we properly fail instead.
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
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Add function of_get_mac_address(), which obtains the best MAC address to use
from the device tree by checking various properties in order. The order is:
'mac-address', then 'local-mac-address', then 'address'. It skips properties
that contain invalid MAC addresses, which were probably not initialized
by U-Boot.
Update gfar_of_init() and fs_enet_of_init() in fsl_soc.c to call
of_get_mac_address().
Signed-off-by: Timur Tabi <timur@freescale.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>
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On some oldworld PowerMacs, OF doesn't assign interrupts properly
beyond P2P bridges. Fortunately, the fix is easy as all those machines
just wire all IRQ lines together to one IRQ which is assigned to the
bridge itself. We already have a special function for parsing Apple
OldWorld interrupts which are special, so let's add to it the ability
to walk up the PCI tree to find interrupts.
This fixes irqs on the lower slots of s900 clones among others.
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
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For PCI devices with only io ports, of_bus_pci_get_flags() will fall
through and still mark the resource as IORESOURCE_MEM.
Signed-off-by: Olof Johansson <olof@lixom.net>
Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
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The original problem that inspired this patch was solved quite some time
ago (Turning off PCI didn't work), but this patch neatens things up a
little (I think), by putting all the PCI stuff inside a single CONFIG_PCI
block. It also removes the OF PCI bus matching entries if CONFIG_PCI is
off.
Signed-off-by: Paul Mackerras <paulus@samba.org>
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This reverts commit 41550c5128150175197257b6ceab2cd50dea7b51.
Quoth Ben Herrenschmidt:
"Please revert this one for now. It seems to break G5s :( Looks like
PCI cells inside Apple IO ASICs don't have a PCI_INTERRUPT_LINE set.
I need to figure out a better fix."
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
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This patch adds checking of the PCI_INTERRUPT_PIN register before
using standard OF parsing to retreive PCI interrupts. The reason is
that some PCI devices may have no PCI interrupt, though they may have
interrupts attached via other means. In this case, we shall not use
irq->pdev, but device-specific code can later retreive those interrupts
instead.
Without that patch, Maple and derivatives don't get the right interrupt
for the second IDE channel as the linux IDE code fallsback to the PCI
irq instead of trying to use the legacy ones for the on-board controller
(which has no PCI_INTERRUPT_PIN). Having no PCI IRQ assign to it (as it
doesn't request any) fixes it.
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
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Device-tree bugs on js20 with some versions of SLOF were causing the
interrupt for IDE to not be parsed correctly and fail to boot. This
patch adds a bit more sanity checking to the parser to detect some of
those errors and fail instead of returning bogus information. The
powerpc PCI code can then trigger a fallback that works on those
machines.
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
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Compile fails without defining CONFIG_PCI.
The patch fix this.
[paulus@samba.org: Moved of_irq_pci_swizzle so we only need one #ifdef]
Signed-off-by: Li Yang <leoli@freescale.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>
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Now that get_property() returns a void *, there's no need to cast its
return value. Also, treat the return value as const, so we can
constify get_property later.
powerpc core changes.
Signed-off-by: Jeremy Kerr <jk@ozlabs.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
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This patch fixes a bit of boundchecking in the new Open Firmware interrupt
tree parsing code. It's important that it fails when things aren't correct in
order to trigger fallback mecanisms that are necessary to make some machines
work properly.
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Paul Mackerras <paulus@samba.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
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The of_bus callbacks map and get_flags can be constified, as they don't
alter the range or addr arguments. of_dump_addr and of_read_addr can
also be constified.
Built for 32- and 64-bit powerpc
Signed-off-by: Jeremy Kerr <jk@ozlabs.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
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Adds new routines to prom_parse to walk the device-tree for interrupt
information. This includes both direct mapping of interrupts and low
level parsing functions for use with partial trees.
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
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My js20 appears to lack the ibm,#dma- properties, and boot fails with a
"Kernel panic - not syncing: iommu_init_table: Can't allocate 0 bytes"
message.
This adds a fallback to the "#address-cells" property in case the
"#ibm,dma-address-cells" property is missing. Tested on js20 and
power5 lpar.
Unless there is a more elegant solution... :-)
Signed-off-by: Will Schmidt <willschm@us.ibm.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>
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Add a function for generic parsing of dma-window properties (ie,
ibm,dma-window and ibm,my-dma-window) of pci and virtual device nodes.
This function will also be used by cell.
Signed-off-by: Jeremy Kerr <jk@ozlabs.org>
Acked-by: Olof Johansson <olof@lixom.net>
Signed-off-by: Paul Mackerras <paulus@samba.org>
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setup_peg2 must do some refcounting.
of_get_pci_address may need to drop the node
Pegasos l2cr : L2 cache was not active, activating
PCI bus 0 controlled by pci at 80000000
Badness in kref_get at /home/olaf/kernel/olh/ppc64/linux-2.6.16-rc2-olh/lib/kref.c:32
Call Trace:
[C037BD00] [C0007934] show_stack+0x5c/0x184 (unreliable)
[C037BD30] [C000E068] program_check_exception+0x184/0x584
[C037BD90] [C000F5F0] ret_from_except_full+0x0/0x4c
--- Exception: 700 at kref_get+0xc/0x24
LR = of_node_get+0x24/0x3c
[C037BE50] [C004FD94] __pte_alloc_kernel+0x64/0x80 (unreliable)
[C037BE70] [C000CA18] of_get_parent+0x34/0x58
[C037BE90] [C0009B18] of_get_address+0x24/0x174
[C037BED0] [C000A108] of_address_to_resource+0x24/0x68
[C037BF00] [C038B128] chrp_find_bridges+0x114/0x470
[C037BF90] [C038AE48] chrp_setup_arch+0x1fc/0x32c
[C037BFB0] [C03849B0] setup_arch+0x144/0x188
[C037BFD0] [C037C45C] start_kernel+0x34/0x1a8
[C037BFF0] [000037A0] 0x37a0
Badness in kref_get at /home/olaf/kernel/olh/ppc64/linux-2.6.16-rc2-olh/lib/kref.c:32
Call Trace:
[C037BC90] [C0007934] show_stack+0x5c/0x184 (unreliable)
[C037BCC0] [C000E068] program_check_exception+0x184/0x584
[C037BD20] [C000F5F0] ret_from_except_full+0x0/0x4c
--- Exception: 700 at kref_get+0xc/0x24
LR = of_node_get+0x24/0x3c
[C037BDE0] [00000000] 0x0 (unreliable)
[C037BE00] [C000CA18] of_get_parent+0x34/0x58
[C037BE20] [C0009CE8] of_translate_address+0x2c/0x2fc
[C037BEA0] [C0009FE8] __of_address_to_resource+0x30/0xc4
[C037BED0] [C000A130] of_address_to_resource+0x4c/0x68
[C037BF00] [C038B128] chrp_find_bridges+0x114/0x470
[C037BF90] [C038AE48] chrp_setup_arch+0x1fc/0x32c
[C037BFB0] [C03849B0] setup_arch+0x144/0x188
[C037BFD0] [C037C45C] start_kernel+0x34/0x1a8
[C037BFF0] [000037A0] 0x37a0
PCI bus 0 controlled by pci at c0000000
Top of RAM: 0x10000000, Total RAM: 0x10000000
Signed-off-by: Olaf Hering <olh@suse.de>
Signed-off-by: Paul Mackerras <paulus@samba.org>
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The first generation of PCI powermacs had a host bridge called /chaos
which was for all intents and purposes a PCI host bridge, but has a
device_type of "vci" in the device tree (presumably it's not really
PCI at the hardware level or something).
The OF parsing stuff in arch/powerpc/kernel/prom_parse.c currently
doesn't recognize it as a PCI bridge, which means that controlfb.c
can't get its device addresses.
This makes prom_parse.c recognize a device_type of "vci" as indicating
a PCI host bridge. With this, controlfb works again.
Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
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This fixes pci_address_to_pio() to return an unsigned long (to be safe)
and fixes a bug in the implementation that caused it to return a bogus
IO port number
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
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This updates the OF address parsers to return the IO flags
indicating the type of address obtained. It also adds a PCI
call for converting physical addresses that hit IO space into
into IO tokens, and add routines that return the translated
addresses into struct resource
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
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The udbg low level io layer has an issue with udbg_getc() returning a
char (unsigned on ppc) instead of an int, thus the -1 if you had no
available input device could end up turned into 0xff, filling your
display with bogus characters. This fixes it, along with adding a little
blob to xmon to do a delay before exiting when getting an EOF and fixing
the detection of ADB keyboards in udbg_adb.c
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
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Parsing addresses extracted from Open Firmware isn't a simple matter. We
have various bits of code that try to do it in various place, including
some heuristics in prom.c that pre-parse addresses at boot and fill
device-nodes "addrs", but those are dodgy at best and I want to
deprecate them. So this patch introduces a new set of routines that
should be capable of parsing most types of addresses and translating
them into CPU physical addresses. It currently works for things on PCI
busses and ISA busses and should work on "standard" busses like the root
bus or the MacIO bus that don't put funky flags in addresses. If you
have other bus types that do use funky flags, you'll have to add new bus
type translators, which is fairly easy.
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
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Paul Mackerras
Kim Phillips
Christian Krafft
Mathieu Desnoyers
Stephen Rothwell
Benjamin Herrenschmidt
Timur Tabi
Olof Johansson
Andy Fleming
Linus Torvalds
Li Yang
Jeremy Kerr
Segher Boessenkool
Will Schmidt
Olaf Hering