MPC5200 PCI Issues
Tobias Knutsson
tobias.knutsson at gmail.com
Fri Feb 6 07:03:43 EST 2009
Hi,
That is exactly what the bootlog shows. Debug output on in both
mpc52xx_pci.c and in pci-common.c. And the discussed code section
enabled.
Hälsningar / Regards
Tobias Knutsson
On 5 feb 2009, at 17.44, Grant Likely <grant.likely at secretlab.ca> wrote:
> On Thu, Feb 5, 2009 at 12:06 AM, Tobias Knutsson
> <tobias.knutsson at gmail.com> wrote:
>> When enabling the debug-printouts, it came to me that I forgot to
>> mention something kind of important. Using the standard
>> mpc52xx_pci.c,
>> even the memory resources are mapped to zero.
>>
>> After disabling this code block, the memory regions are mapped out
>> fine (but still no IO):
>
> Reenable this code, enable debug in arch/powerpc/kernel/pci-common.c,
> and post the results.
>
> When this code is disabled then you're just getting the leftovers from
> U-Boot's scan of the PCI bus. For MPC5200 support Linux does its own
> scan and its own allocation of memory/IO address space and this code
> is needed to make sure that happens.
>
> g.
>
>>
>> static void
>> mpc52xx_pci_fixup_resources(struct pci_dev *dev)
>> {
>> int i;
>>
>> pr_debug("mpc52xx_pci_fixup_resources() %.4x:%.4x\n",
>> dev->vendor, dev->device);
>>
>> /* We don't rely on boot loader for PCI and resets all
>> devices */
>> for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) {
>> struct resource *res = &dev->resource[i];
>> if (res->end > res->start) { /* Only valid
>> resources */
>> res->end -= res->start;
>> res->start = 0;
>> res->flags |= IORESOURCE_UNSET;
>> }
>> }
>>
>> What is the purpose of this code? Since all resources are reset here,
>> where are they inteded to be re-allocated?
>>
>> Here is the bootlog with the aforementioned code enabled:
>>
>>
>> reading cuImage.lite5200b
>>
>> 1833699 bytes read
>> ## Booting kernel from Legacy Image at 00201400 ...
>> Image Name: Linux-2.6.28
>> Created: 2009-02-05 6:54:20 UTC
>> Image Type: PowerPC Linux Kernel Image (gzip compressed)
>> Data Size: 1833635 Bytes = 1.7 MB
>> Load Address: 00400000
>> Entry Point: 004005a0
>> Verifying Checksum ... OK
>> Uncompressing Kernel Image ... OK
>> [ 0.000000] Using lite5200 machine description
>> [ 0.000000] Linux version 2.6.28 (tknutsson at ztn-ubuntu) (gcc
>> version 4.3.2 (Sourcery G++ Lite 4.3-50) ) #66 Thu Feb 5 07:51:46 CET
>> 2009
>> [ 0.000000] Adding MPC52xx PCI host bridge /pci at f0000d00
>> [ 0.000000] PCI host bridge /pci at f0000d00 (primary) ranges:
>> [ 0.000000] MEM 0x0000000050000000..0x000000005fffffff ->
>> 0x0000000050000000
>> [ 0.000000] IO 0x0000000060000000..0x0000000060ffffff ->
>> 0x0000000000000000
>> [ 0.000000] mpc52xx_pci_setup(hose=c03ec000, pci_regs=fdffad00)
>> [ 0.000000] mem_resource[0] =
>> {.start=50000000, .end=5fffffff, .flags=200}
>> [ 0.000000] .io_resource={.start=0,.end=ffffff,.flags=100}
>> .io_base_phys=0x60000000
>> [ 0.000000] Zone PFN ranges:
>> [ 0.000000] DMA 0x00000000 -> 0x00004000
>> [ 0.000000] Normal 0x00004000 -> 0x00004000
>> [ 0.000000] Movable zone start PFN for each node
>> [ 0.000000] early_node_map[1] active PFN ranges
>> [ 0.000000] 0: 0x00000000 -> 0x00004000
>> [ 0.000000] Built 1 zonelists in Zone order, mobility grouping on.
>> Total pages: 16256
>> [ 0.000000] Kernel command line: console=ttyPSC0,115200 root=/
>> dev/sda2 rw
>> [ 0.000000] MPC52xx PIC is up and running!
>> [ 0.000000] PID hash table entries: 256 (order: 8, 1024 bytes)
>> [ 0.000000] clocksource: timebase mult[7d00000] shift[22]
>> registered
>> [ 0.000263] console [ttyPSC0] enabled
>> [ 0.121690] Dentry cache hash table entries: 8192 (order: 3,
>> 32768 bytes)
>> [ 0.129012] Inode-cache hash table entries: 4096 (order: 2,
>> 16384 bytes)
>> [ 0.147433] Memory: 60844k/65536k available (3704k kernel code,
>> 4624k reserved, 156k data, 117k bss, 180k init)
>> [ 0.157672] SLUB: Genslabs=12, HWalign=32, Order=0-3,
>> MinObjects=0,
>> CPUs=1, Nodes=1
>> [ 0.165373] Calibrating delay loop... 63.87 BogoMIPS (lpj=127744)
>> [ 0.236265] Mount-cache hash table entries: 512
>> [ 0.245719] net_namespace: 288 bytes
>> [ 0.250237] NET: Registered protocol family 16
>> [ 0.284887] PCI: Probing PCI hardware
>> [ 0.289670] mpc52xx_pci_fixup_resources() 1057:5809
>> [ 0.294799] PCI:0000:00:17.0 Resource 0
>> 0000000050400000-00000000507fffff [21208] fixup...
>> [ 0.303180] PCI:0000:00:17.0
>> 0000000050400000-00000000507fffff
>> [ 0.309998] PCI:0000:00:17.0 Resource 1
>> 0000000050800000-0000000050ffffff [20200] fixup...
>> [ 0.318262] PCI:0000:00:17.0
>> 0000000050800000-0000000050ffffff
>> [ 0.325062] PCI:0000:00:17.0 Resource 2
>> 0000000060000000-000000006000000f [20101] fixup...
>> [ 0.333326] PCI:0000:00:17.0
>> 0000000060000000-000000006000000f
>> [ 0.340124] mpc52xx_pci_fixup_resources() 104c:9065
>> [ 0.345242] PCI:0000:00:18.0 Resource 0
>> 0000000051000000-00000000513fffff [21208] fixup...
>> [ 0.353519] PCI:0000:00:18.0
>> 0000000051000000-00000000513fffff
>> [ 0.360319] PCI:0000:00:18.0 Resource 1
>> 0000000051800000-0000000051ffffff [20200] fixup...
>> [ 0.368583] PCI:0000:00:18.0
>> 0000000051800000-0000000051ffffff
>> [ 0.375383] PCI:0000:00:18.0 Resource 2
>> 0000000060000010-000000006000001f [20101] fixup...
>> [ 0.383647] PCI:0000:00:18.0
>> 0000000060000010-000000006000001f
>> [ 0.390444] mpc52xx_pci_fixup_resources() 104c:9065
>> [ 0.395549] PCI:0000:00:19.0 Resource 0
>> 0000000052000000-00000000523fffff [21208] fixup...
>> [ 0.403826] PCI:0000:00:19.0
>> 0000000052000000-00000000523fffff
>> [ 0.410626] PCI:0000:00:19.0 Resource 1
>> 0000000052800000-0000000052ffffff [20200] fixup...
>> [ 0.418889] PCI:0000:00:19.0
>> 0000000052800000-0000000052ffffff
>> [ 0.425690] PCI:0000:00:19.0 Resource 2
>> 0000000060000020-000000006000002f [20101] fixup...
>> [ 0.433954] PCI:0000:00:19.0
>> 0000000060000020-000000006000002f
>> [ 0.440751] mpc52xx_pci_fixup_resources() 104c:9065
>> [ 0.445854] PCI:0000:00:1a.0 Resource 0
>> 0000000053000000-00000000533fffff [21208] fixup...
>> [ 0.454130] PCI:0000:00:1a.0
>> 0000000053000000-00000000533fffff
>> [ 0.460930] PCI:0000:00:1a.0 Resource 1
>> 0000000053800000-0000000053ffffff [20200] fixup...
>> [ 0.469194] PCI:0000:00:1a.0
>> 0000000053800000-0000000053ffffff
>> [ 0.475994] PCI:0000:00:1a.0 Resource 2
>> 0000000060000030-000000006000003f [20101] fixup...
>> [ 0.484258] PCI:0000:00:1a.0
>> 0000000060000030-000000006000003f
>> [ 0.491056] mpc52xx_pci_fixup_resources() 104c:9065
>> [ 0.495999] PCI: Fixup bus 0 (PHB)
>> [ 0.499383] PCI: device 0000:00:16.0 OF node: <none>
>> [ 0.504371] PCI: device 0000:00:17.0 OF node: <none>
>> [ 0.509363] PCI: device 0000:00:18.0 OF node: <none>
>> [ 0.514354] PCI: device 0000:00:19.0 OF node: <none>
>> [ 0.519345] PCI: device 0000:00:1a.0 OF node: <none>
>> [ 0.524332] Try to map irq for 0000:00:16.0...
>> [ 0.528808] Try to map irq for 0000:00:17.0...
>> [ 0.533334] -> got one, spec 3 cells (0x00000001 0x00000001...)
>> on
>> /soc5200 at f0000000/interrupt-controller at 500
>> [ 0.543389] -> mapped to linux irq 65
>> [ 0.547117] Try to map irq for 0000:00:18.0...
>> [ 0.551626] -> got one, spec 3 cells (0x00000001 0x00000001...)
>> on
>> /soc5200 at f0000000/interrupt-controller at 500
>> [ 0.561629] -> mapped to linux irq 65
>> [ 0.565353] Try to map irq for 0000:00:19.0...
>> [ 0.569858] -> got one, spec 3 cells (0x00000001 0x00000001...)
>> on
>> /soc5200 at f0000000/interrupt-controller at 500
>> [ 0.579863] -> mapped to linux irq 65
>> [ 0.583587] Try to map irq for 0000:00:1a.0...
>> [ 0.588099] -> got one, spec 3 cells (0x00000001 0x00000001...)
>> on
>> /soc5200 at f0000000/interrupt-controller at 500
>> [ 0.598103] -> mapped to linux irq 65
>> [ 0.605144] PCI: PHB (bus 0) bridge rsrc 0:
>> 0000000000000000-0000000000ffffff [0x100], parent c03a1fdc (PCI IO)
>> [ 0.615266] PCI: PHB (bus 0) bridge rsrc 1:
>> 0000000050000000-000000005fffffff [0x200], parent c03a1fc0 (PCI mem)
>> [ 0.625539] PCI: Assigning unassigned resouces...
>> [ 0.630304] bus: 00 index 0 io port: [0x00-0xffffff]
>> [ 0.635299] bus: 00 index 1 mmio: [0x50000000-0x5fffffff]
>> [ 0.640909] DMA: MPC52xx BestComm driver
>> [ 0.645214] DMA: MPC52xx BestComm engine @f0001200 ok !
>> [ 0.678739] SCSI subsystem initialized
>> [ 0.709498] NET: Registered protocol family 2
>> [ 0.754980] IP route cache hash table entries: 1024 (order: 0,
>> 4096 bytes)
>> [ 0.762429] TCP established hash table entries: 2048 (order: 2,
>> 16384 bytes)
>> [ 0.769716] TCP bind hash table entries: 2048 (order: 1, 8192
>> bytes)
>> [ 0.776224] TCP: Hash tables configured (established 2048 bind
>> 2048)
>> [ 0.782604] TCP reno registered
>> [ 0.795054] NET: Registered protocol family 1
>> [ 0.846171] JFFS2 version 2.2. (NAND) (c) 2001-2006 Red Hat, Inc.
>> [ 0.855699] msgmni has been set to 118
>> [ 0.861227] alg: No test for stdrng (krng)
>> [ 0.865651] io scheduler noop registered
>> [ 0.869658] io scheduler anticipatory registered (default)
>> [ 0.875224] io scheduler deadline registered
>> [ 0.879838] io scheduler cfq registered
>> [ 1.442231] Generic RTC Driver v1.07
>> [ 1.447145] Serial: MPC52xx PSC UART driver
>> [ 1.451885] f0002200.serial: ttyPSC2 at MMIO 0xf0002200 (irq =
>> 130)
>> is a MPC52xx PSC
>> [ 1.461497] f0002400.serial: ttyPSC3 at MMIO 0xf0002400 (irq =
>> 131)
>> is a MPC52xx PSC
>> [ 1.471257] f0002600.serial: ttyPSC4 at MMIO 0xf0002600 (irq =
>> 139)
>> is a MPC52xx PSC
>> [ 1.480866] f0002800.serial: ttyPSC5 at MMIO 0xf0002800 (irq =
>> 140)
>> is a MPC52xx PSC
>> [ 1.490461] f0002c00.serial: ttyPSC0 at MMIO 0xf0002c00 (irq =
>> 132)
>> is a MPC52xx PSC
>> [ 1.521689] brd: module loaded
>> [ 1.535886] loop: module loaded
>> [ 1.544328] mpc52xx MII bus: probed
>> [ 1.550220] net eth0: Using PHY at MDIO address 0
>> [ 1.556124] Driver 'sd' needs updating - please use bus_type
>> methods
>> [ 1.563224] ata: MPC52xx IDE/ATA libata driver
>> [ 1.568729] scsi0 : mpc52xx_ata
>> [ 1.573032] ata1: PATA max UDMA/33 ata_regs 0xf0003a00 irq 135
>> [ 1.751224] ata1.00: ATA-0: TRANSCEND, 20070831, max UDMA/66
>> [ 1.756948] ata1.00: 3915072 sectors, multi 0: LBA
>> [ 1.775156] ata1.00: configured for UDMA/33
>> [ 1.803154] ata1.00: configured for UDMA/33
>> [ 1.807423] ata1: EH complete
>> [ 1.811300] scsi 0:0:0:0: Direct-Access ATA TRANSCEND
>> 2007 PQ: 0 ANSI: 5
>> [ 1.821337] sd 0:0:0:0: [sda] 3915072 512-byte hardware sectors:
>> (2.00 GB/1.86 GiB)
>> [ 1.829333] sd 0:0:0:0: [sda] Write Protect is off
>> [ 1.834879] sd 0:0:0:0: [sda] Write cache: disabled, read cache:
>> enabled, doesn't support DPO or FUA
>> [ 1.844851] sd 0:0:0:0: [sda] 3915072 512-byte hardware sectors:
>> (2.00 GB/1.86 GiB)
>> [ 1.852841] sd 0:0:0:0: [sda] Write Protect is off
>> [ 1.858259] sd 0:0:0:0: [sda] Write cache: disabled, read cache:
>> enabled, doesn't support DPO or FUA
>> [ 1.867450] sda: sda1 sda2
>> [ 1.881490] sd 0:0:0:0: [sda] Attached SCSI disk
>> [ 1.890711] fc000000.flash: Found 1 x16 devices at 0x0 in 8-bit
>> bank
>> [ 1.897222] Amd/Fujitsu Extended Query Table at 0x0040
>> [ 1.902529] fc000000.flash: CFI does not contain boot bank
>> location. Assuming top.
>> [ 1.910147] number of CFI chips: 1
>> [ 1.913603] cfi_cmdset_0002: Disabling erase-suspend-program due
>> to
>> code brokenness.
>> [ 1.922009] RedBoot partition parsing not available
>> [ 1.926998] Creating 4 MTD partitions on "fc000000.flash":
>> [ 1.932547] 0x00000000-0x00500000 : "u-boot"
>> [ 1.940601] 0x00500000-0x01000000 : "kernel"
>> [ 1.948071] 0x01000000-0x02000000 : "rootfs"
>> [ 1.955601] 0x02000000-0x03000000 : "application"
>> [ 1.964240] i2c /dev entries driver
>> [ 1.975775] Advanced Linux Sound Architecture Driver Version
>> 1.0.18rc3.
>> [ 1.983814] ASoC version 0.13.2
>> [ 1.987668] tlv320aic23 0-001a: probing tlv320aic23 i2c device
>> [ 2.040451] registering ASoC codec driver:
>> /soc5200 at f0000000/i2c at 3d00/codec at 1a
>> [ 2.049539] ALSA device list:
>> [ 2.052591] No soundcards found.
>> [ 2.057430] TCP cubic registered
>> [ 2.060765] NET: Registered protocol family 17
>> [ 2.066886] RPC: Registered udp transport module.
>> [ 2.071683] RPC: Registered tcp transport module.
>> [ 2.087086] EXT2-fs warning: mounting unchecked fs, running e2fsck
>> is recommended
>> [ 2.094828] VFS: Mounted root (ext2 filesystem).
>> [ 2.099690] Freeing unused kernel memory: 180k init
>>
>> On Wed, Feb 4, 2009 at 18:54, Grant Likely
>> <grant.likely at secretlab.ca> wrote:
>>> On Wed, Feb 4, 2009 at 9:53 AM, Tobias Knutsson
>>> <tobias.knutsson at gmail.com> wrote:
>>>> clock-frequency = <0x1e84800>; //<0>; // From boot
>>>> loader
>>>> interrupts = <2 8 0 2 9 0 2 10 0>;
>>>> interrupt-parent = <&mpc5200_pic>;
>>>> bus-range = <0 0>;
>>>> ranges = <0x02000000 0 0x50000000 0x50000000 0
>>>> 0x10000000
>>>> 0x01000000 0 0x00000000 0x60000000 0
>>>> 0x01000000>;
>>>> };
>>>>
>>>> The cards' memory regions are mapped out fine to different
>>>> addresses
>>>> in the 0x50000000-0x60000000 range. However, the IO regions are
>>>> all mapped
>>>> to zero.
>>>>
>>>> Do you have any idea on what could be wrong or in which direction I
>>>> should be looking?
>>>
>>> Hmmm. Your ranges property looks okay to me. The MPC5200 setup
>>> code
>>> may be doing the wrong thing. Turn on debug at the top of
>>> arch/powerpc/platforms/mpc52xx/mpc52xx_pci.c and post your kernel
>>> output.
>>>
>>> g.
>>>
>>> --
>>> Grant Likely, B.Sc., P.Eng.
>>> Secret Lab Technologies Ltd.
>>>
>>
>>
>>
>> --
>>
>> Hälsningar/Regards
>> Tobias Knutsson
>>
>
>
>
> --
> Grant Likely, B.Sc., P.Eng.
> Secret Lab Technologies Ltd.
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