Fw: Regarding Device tree PCI binding on Linux-2.6.30 kernels
Thirumalai
thirumalai.p at datapatterns.co.in
Wed Aug 12 21:45:03 EST 2009
> Hi,
> Is there any changes on PCI Device tree binding has happened? Because i
> am trying to port linux 2.6.30 to my MPC7448 based custom board. The
> target is getting hanged at ethernet initialization. Also i have seen on
> the debug message of kernel that the PCI MEM/IO resources are not getting
> assigned. So when searched the reason for not assigning the PCI MEM/IO
> spaces. I have seen the implemetation of
> /linux/arch/powerpc/kernel/pci-common.c/ pci_process_bridge_OF_ranges() is
> some what different from the old kernels. The CPU address is taken using
> of_translate_address() function which is in prom_parse.c. This step is not
> included on the previous implementations. This particular implementation
> causing me problem of not finding PCI MEM/IO spaces. I have taken the dts
> file of arch/powerpc/boot/dts/MPC7448hpc2.dts as my base dts file and
> started to port for my hardware.
> Kindly let me know any changes that i need to know.
> My dts file,
>
> / {
> model = "dpvme0447";
> compatible = "mpc74xx";
> #address-cells = <1>;
> #size-cells = <1>;
>
> aliases {
> ethernet0 = &enet0;
> ethernet1 = &enet1;
>
> serial0 = &serial0;
> serial1 = &serial1;
>
> };
>
> cpus {
> #address-cells = <1>;
> #size-cells =<0>;
>
> PowerPC,7448 at 0 {
> device_type = "cpu";
> reg = <0>;
> d-cache-line-size = <0x20>; // 32 bytes
> i-cache-line-size = <0x20>; // 32 bytes
> d-cache-size = <0x8000>; // L1, 32K
> bytes
> i-cache-size = <0x8000>; // L1, 32K
> bytes
> timebase-frequency = <0>; // 33 MHz, from
> uboot
> clock-frequency = <0>; // From U-Boot
> bus-frequency = <0>; // From U-Boot
> 32-bit;
> };
> };
>
> memory {
> device_type = "memory";
> reg = <0x00000000 0x20000000 // DDR2 512M at 0
> >;
> };
>
> tsi108 at 50000000 {
> #address-cells = <1>;
> #size-cells = <1>;
> device_type = "tsi-bridge";
> ranges = <0x00000000 0x50000000 0x00010000>;
> reg = <0x50000000 0x00010000>;
> assigned-addresses = <0>;
> bus-frequency = <0>;
>
> i2c at 7000 {
> interrupt-parent = <&mpic>;
> interrupts = <0xE 0>;
> reg = <0x7000 0x400>;
> device_type = "i2c";
> compatible = "tsi108-i2c";
> };
>
> MDIO: mdio at 6000 {
> device_type = "mdio";
> compatible = "tsi108-mdio";
> reg = <0x6000 0x50>;
> #address-cells = <1>;
> #size-cells = <0>;
>
> phy8: ethernet-phy at 6000 {
> interrupt-parent = <&mpic>;
> interrupts = <2 1>;
> reg = <8>;
> device_type = "ethernet-phy";
> };
>
> phy9: ethernet-phy at 6400 {
> interrupt-parent = <&mpic>;
> interrupts = <2 1>;
> reg = <9>;
> device_type = "ethernet-phy"; enet0:
> ethernet at 6200 {
> linux,network-index = <0>;
> #size-cells = <0>;
> device_type = "network";
> compatible = "tsi108-ethernet";
> reg = <0x6000 0x200>;
> address = [ 00 06 D2 00 00 01 ];
> interrupts = <0x10 2>;
> interrupt-parent = <&mpic>;
> mdio-handle = <&MDIO>;
> phy-handle = <&phy8>;
> };
>
> enet1: ethernet at 6600 {
> linux,network-index = <1>;
> #address-cells = <1>;
> #size-cells = <0>;
> device_type = "network";
> compatible = "tsi108-ethernet";
> reg = <0x6400 0x200>;
> address = [ 00 06 D2 00 00 02 ];
> interrupts = <0x11 2>;
> interrupt-parent = <&mpic>;
> mdio-handle = <&MDIO>;
> phy-handle = <&phy9>;
> };
>
> serial0: serial at 7808 {
> device_type = "serial";
> compatible = "ns16550";
> reg = <0x7808 0x200>;
> clock-frequency = <0x3f6b5a00>;
> interrupts = <0xc 0>;
> interrupt-parent = <&mpic>;
> };
>
> serial1: serial at 7c08 {
> device_type = "serial";
> compatible = "ns16550";
> reg = <0x7c08 0x200>;
> clock-frequency = <0x3f6b5a00>;
> interrupts = <0xd 0>;
> interrupt-parent = <&mpic>;
> };
> mpic: pic at 7400 {
> clock-frequency = <0>;
> interrupt-controller;
> #address-cells = <0>;
> #interrupt-cells = <2>;
> reg = <0x7400 0x400>;
> built-in;
> compatible = "chrp,open-pic";
> device_type = "open-pic";
> big-endian;
> };
> pci at 1000 {
> device_type = "pci";
> compatible = "tsi108-pci";
> #interrupt-cells = <1>;
> #size-cells = <2>;
> #address-cells = <3>;
> reg = <0x1000 0x1000>;
> big-endian;
> bus-range = <0x0 0xff>;
> /* RANGE_TYPE UNKNOWN PCI_ADD PROC_ADDR UNKNOWN
> SIZE
> 02000000 - PCIMEM
> 42000000 - PCI-MEM-PREFETCH
> 01000000 - PCIIO
> */
> ranges = <0x02000000 0x0 0xe0000000 0xe0000000 0x0
> 0x10000000
> 0x42000000 0x0 0x80000000 0x80000000 0x0
> 0x40000000
> 0x01000000 0x0 0x00000000 0xf0000000 0x0
> 0x00010000>;
> clock-frequency = <0x7f28154>;
> interrupt-parent = <&mpic>;
> interrupts = <0x17 2>;
> interrupt-map-mask = <0xf800 0 0 7>;
> interrupt-map = <
>
> /* IDSEL 0x11 */
> 0x0800 0x0 0x0 0x1 &RT0 0x24 0x0
> 0x0800 0x0 0x0 0x2 &RT0 0x25 0x0
> 0x0800 0x0 0x0 0x3 &RT0 0x26 0x0
> 0x0800 0x0 0x0 0x4 &RT0 0x27 0x0
>
> /* IDSEL 0x12 */
> 0x1000 0x0 0x0 0x1 &RT0 0x25 0x0
> 0x1000 0x0 0x0 0x2 &RT0 0x26 0x0
> 0x1000 0x0 0x0 0x3 &RT0 0x27 0x0
> 0x1000 0x0 0x0 0x4 &RT0 0x24 0x0
>
> /* IDSEL 0x13 */
> 0x1800 0x0 0x0 0x1 &RT0 0x26 0x0
> 0x1800 0x0 0x0 0x2 &RT0 0x27 0x0
> 0x1800 0x0 0x0 0x3 &RT0 0x26 0x0
> 0x1800 0x0 0x0 0x4 &RT0 0x26 0x0
>
> /* IDSEL 0x14 */
> 0x2000 0x0 0x0 0x1 &RT0 0x27 0x0
> 0x2000 0x0 0x0 0x2 &RT0 0x24 0x0
> 0x2000 0x0 0x0 0x3 &RT0 0x25 0x0
> 0x2000 0x0 0x0 0x4 &RT0 0x26 0x0
> >;
>
> RT0: router at 1180 {
> clock-frequency = <0>;
> interrupt-controller;
> device_type = "pic-router";
> #address-cells = <0>;
> #interrupt-cells = <2>;
> built-in;
> big-endian;
> interrupts = <0x17 2>;
> interrupt-parent = <&mpic>;
> };
> };
> };
> };
>
> Regards,
> T.
> };
>
> };
>
Panic Message that i got
------------[ cut here ]------------
Kernel BUG at c0190764 [verbose debug info unavailable]
Oops: Exception in kernel mode, sig: 5 [#1]
DPVME0447
NIP: c0190764 LR: c0190764 CTR: c014ea54
REGS: df82bd80 TRAP: 0700 Not tainted (2.6.30)
MSR: 00029032 <EE,ME,CE,IR,DR> CR: 24000022 XER: 20000000
TASK = df82c000[1] 'swapper' THREAD: df82a000
GPR00: c0190764 df82be30 df82c000 0000001a 00001509 ffffffff c014e9a4
00000034
GPR08: c02f4af0 c02e9bb8 00001509 c02cf8f4 24000022 00000000 00000002
00000000
GPR16: c02c0000 00000000 00000000 00000000 00000000 0ffaa41c c0300000
00000004
GPR24: 00000000 00000000 c02f0000 c02f0000 df821030 00000000 df821000
df821300
NIP [c0190764] tsi108_open+0x68/0x9c
LR [c0190764] tsi108_open+0x68/0x9c
Call Trace:
[df82be30] [c0190764] tsi108_open+0x68/0x9c (unreliable)
[df82be50] [c01b157c] dev_open+0xac/0x11c
[df82be70] [c01b147c] dev_change_flags+0x160/0x1b4
[df82be90] [c02bd8f4] ip_auto_config+0x18c/0xe5c
[df82bf50] [c0003c8c] do_one_initcall+0x34/0x1a8
[df82bfd0] [c02a2848] kernel_init+0x9c/0x100
[df82bff0] [c0012024] kernel_thread+0x4c/0x68
Instruction dump:
7c7d1b79 40820034 80bf003c 3c60c029 7fc6f378 38632ad8 90be0028 809f0040
4be90669 3c60c029 38632b08 4be9065d <0fe00000> 48000000 80bf003c 3c60c029
---[ end trace a900fd7f842065b9 ]---
Kernel panic - not syncing: Attempted to kill init!
Rebooting in 180 seconds..
Regards,
T.
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