MPC5200 PCI Issues
Grant Likely
grant.likely at secretlab.ca
Fri Feb 6 03:44:50 EST 2009
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.
More information about the Linuxppc-dev
mailing list