Hi, I have a Freescale MPC8245 machine running Montavista Linux (kernel 2.4.20). There are two devices connected to the PCI bus: a USB host controller (VIA VT6212L) and a single-chip network switch (Broadcom BCM5650).
Now BCM5650 is working but VT6212L is not. I tried to modify the PCI code but met some problems. Here are the PCI information and boot message: Bus 0, device 0, devfn 0 (id 1057-0006, headertype 0x00) region 0: mask 0x00000008, now at 0x00000000 region 0: type mem, size 0 (0MB) region 1: mask 0xfffff000, now at 0x00000000 region 1: type mem, size 4096 (4KB) region 2: mask 0x00000008, now at 0x00000000 region 2: type mem, size 0 (0MB) Bus 0, device 16, devfn 0 (id 14e4-5650, headertype 0x00) <-- BCM5650 region 0: mask 0xffff0004, now at 0xbfff0000 region 0: type mem, size 65536 (64KB) region 1: mask 0x000000ff, now at 0x00000000 region 1: type I/O, size 65284 (65284B) Bus 0, device 17, devfn 0 (id 1106-3038, headertype 0x00) <-- VT6212L (UHCI 1) region 4: mask 0xffffffe1, now at 0x00bfffe0 region 4: type I/O, size 32 (32B) Bus 0, device 17, devfn 1 (id 1106-3038, headertype 0x00) <-- VT6212L (UHCI 2) region 4: mask 0xffffffe1, now at 0x00bfffc0 region 4: type I/O, size 32 (32B) Bus 0, device 17, devfn 2 (id 1106-3104, headertype 0x00) <-- VT6212L (EHCI) region 0: mask 0xffffff00, now at 0xbffeff00 region 0: type mem, size 256 (256B) -- PCI: Probing PCI hardware PCI:00:00.0 Resource 0 [00000000-ffffffff] is unassigned PCI:00:00.0 Resource 1 [00000000-00000fff] is unassigned PCI:00:00.0 Resource 2 [00000000-ffffffff] is unassigned PCI: bridge rsrc 0..bfffff (100), parent c0179de4 PCI: bridge rsrc 80000000..fcffffff (200), parent c0179e00 PCI:00:10.0: Resource 0: bfff0000-bfffffff (f=204) <-- BCM5650 PCI:00:11.0: Resource 4: 00bfffe0-00bfffff (f=101) <-- VT6212L (UHCI 1) PCI:00:11.1: Resource 4: 00bfffc0-00bfffdf (f=101) <-- VT6212L (UHCI 2) PCI:00:11.2: Resource 0: bffeff00-bffeffff (f=200) <-- VT6212L (EHCI) -- It seems no problem with the allocated resource regions for VT6212L, but I got "Timeout" message printed by USB driver. So, I modify the function "mpc10x_bridge_set_resources" in "arch/ppc/kernel/mpc10x_common.c": case MPC10X_MEM_MAP_B: pci_init_resource(&hose->io_resource, 0x00000000, 0xffff, /* original value: 0x00bfffff, */ IORESOURCE_IO, "PCI host bridge"); -- and the defination of MPC10X_MAPB_PCI_IO_END in "include/asm/mpc10x.h": #define MPC10X_MAPB_PCI_IO_END (0x00010000 - 1) /* original value: (0x00c00000 - 1) */ -- After modification, the USB 1.x driver (UHCI) is working, and EHCI is still not working. BUT I don't know why the UHCI works if I do the above modification? The PCI information after modification is shown below: Bus 0, device 17, function 0: Class 0c03: PCI device 1106:3038 (rev 97). IRQ 1. Master Capable. Latency=128. I/O at 0xffe0 [0xffff]. <-- I/O change to 0xffe0 Bus 0, device 17, function 1: Class 0c03: PCI device 1106:3038 (rev 97). IRQ 1. Master Capable. Latency=128. I/O at 0xffc0 [0xffdf]. <-- I/O change to 0xffc0 Bus 0, device 17, function 2: Class 0c03: PCI device 1106:3104 (rev 99). IRQ 1. Master Capable. Latency=128. Non-prefetchable 32 bit memory at 0xbffeff00 [0xbffeffff]. -- I do the modification for the PCI memory configuration similar to the modification for PCI I/O configuration: [arch/ppc/kernel/mpc10x_common.c] case MPC10X_MEM_MAP_B: ... snipped pci_init_resource (&hose->mem_resources[0], 0x00000000, /* original value: 0x80000000, */ 0x000fffff, /* original value: 0xfcffffff, */ IORESOURCE_MEM, "PCI host bridge"); -- [include/asm/mpc10x.h] #define MPC10X_MAPB_ISA_MEM_BASE 0x00000000 /* original value: 0x80000000 */ ... snipped #define MPC10X_MAPB_PCI_MEM_START 0x00000000 /* original value: 0x80000000 */ #define MPC10X_MAPB_PCI_MEM_END (0x00100000 - 1) /* original value: (0xC0000000 - 1) */ -- Surprisingly, after this modification, the USB2.0 driver (EHCI) can work. BUT, the BCM5650 driver failed... Here are the PCI information and boot message: Bus 0, device 16, function 0: Class 0280: PCI device 14e4:5650 (rev 17). Master Capable. Latency=128. Non-prefetchable 64 bit memory at 0xf0000 [0xfffff]. <-- BCM5650 PCI memory address change to 0xf0000 Bus 0, device 17, function 0: Class 0c03: PCI device 1106:3038 (rev 97). IRQ 1. Master Capable. Latency=128. I/O at 0xffe0 [0xffff]. Bus 0, device 17, function 1: Class 0c03: PCI device 1106:3038 (rev 97). IRQ 1. Master Capable. Latency=128. I/O at 0xffc0 [0xffdf]. Bus 0, device 17, function 2: Class 0c03: PCI device 1106:3104 (rev 99). IRQ 1. Master Capable. Latency=128. Non-prefetchable 32 bit memory at 0xeff00 [0xeffff]. <-- EHCI PCI memory address change to 0xeff00 -- PCI: bridge rsrc 0..ffff (100), parent c016fde4 PCI: bridge rsrc 0..fffff (200), parent c016fe00 PCI:00:10.0: Resource 0: 000f0000-000fffff (f=204) PCI:00:11.0: Resource 4: 0000ffe0-0000ffff (f=101) PCI:00:11.1: Resource 4: 0000ffc0-0000ffdf (f=101) PCI:00:11.2: Resource 0: 000eff00-000effff (f=200) -- And the failure message during inserting BCM5650 driver into kernel is: __ioremap(): phys addr f0000 is RAM lr c0011db0 Oops: kernel access of bad area, sig: 11 NIP: C4881164 XER: 20000000 LR: C4887EDC SP: C3729C90 REGS: c3729be0 TRAP: 0300 Not tainted MSR: 00001032 EE: 0 PR: 0 FP: 0 ME: 1 IR/DR: 11 DAR: 00000148, DSISR: 22000000 TASK = c3728000[109] 'insmod' Last syscall: 128 ... snipped -- I have really no idea about this problem because I'm pretty new to PowerPC and PCI architecture :'( (So I think my modification may not reasonable) Can anyone help me solve this problem ? Any pointers and help would be greatly appreciated. Thank you! Kenny