Hi Tiejun, Thanks for the reply. I am sending you the updated dmesg O/P(after enabling CONFIG_PCI_DEBUG) as attachment as well as at the end of the mail.
As far as driver is concern, I am trying the pci_skel driver available as example with LDD book with slight modifications. Driver Code: ================================================================ #include <linux/kernel.h> #include <linux/module.h> #include <linux/pci.h> /* PCI IDs */ static struct pci_device_id ids[] = { { PCI_DEVICE(0x1204, 0xe250) }, { 0, } }; MODULE_DEVICE_TABLE(pci, ids); static unsigned char skel_get_revision(struct pci_dev *dev) { u8 revision; pci_read_config_byte(dev, PCI_REVISION_ID, &revision); return revision; } static u16 skel_get_vendor_id(struct pci_dev *dev) { u16 vendor_id; pci_read_config_word(dev, PCI_VENDOR_ID, &vendor_id); return vendor_id; } static u16 skel_get_device_id(struct pci_dev *dev) { u16 device_id; pci_read_config_word(dev, PCI_DEVICE_ID, &device_id); return device_id; } static int probe(struct pci_dev *dev, const struct pci_device_id *id) { /* Do probing type stuff here. * Like calling request_region(); */ int err, i; printk(KERN_ALERT "PCI driver: Probe function\n"); /* * Enable the bus-master bit values. * Some PCI BIOSes fail to set the master-enable bit. * Some demos support being an initiator, so need bus master ability. */ err = pci_request_regions(dev, "pci_skell"); if (err) { printk(KERN_ERR "request region failed :%d\n", err); return err; } pci_set_master(dev); if ((err = pci_enable_device(dev)) != 0) { printk(KERN_ERR "Unable to Enable PCI device:%d\n", err); return err; } printk(KERN_ALERT "PCI driver Vendor ID = %x\n", skel_get_vendor_id(dev)); printk(KERN_ALERT "PCI driver Device ID = %x\n", skel_get_device_id(dev)); printk(KERN_ALERT "PCI driver Revision = %d\n", skel_get_revision(dev)); return 0; } static void remove(struct pci_dev *dev) { /* clean up any allocated resources and stuff here. * like call release_region(); */ } static struct pci_driver pci_driver = { .name = "pci_skel", .id_table = ids, .probe = probe, .remove = remove, }; static int __init pci_skel_init(void) { printk(KERN_ALERT "PCI driver: Init function\n"); return pci_register_driver(&pci_driver); } static void __exit pci_skel_exit(void) { printk(KERN_ALERT "PCI driver: Exit function\n"); pci_unregister_driver(&pci_driver); } MODULE_LICENSE("GPL"); module_init(pci_skel_init); module_exit(pci_skel_exit); ================================================================ The above code fails at the pci_request_regions(dev, "pci_skell"); call, with -EBUSY(-16) i.e resource busy error. If I don't request for resources and directly enable the pci device by calling pci_device_enable(), it gives the error message PCI driver: Init function PCI driver: Probe function pci_skel 0001:02:00.0: device not available (can't reserve [mem 0x00000000-0x0003ffff]) Unable to Enable PCI device:-22 pci_skel: probe of 0001:02:00.0 failed with error -22 > Especially I want to know how/where you get > these two range, a8000000-a803ffff and a8040000-a807ffff. You wired them firstly > on the driver or allocated by the kernel? Actually as I said before, I tried my device on i386 machine and there I got two ranges fe900000-fe93ffff and fe940000-fe97ffff, so from there I am guessing that on PowerPC also, it should allocate two ranges a8000000-a803ffff and a8040000-a807ffff resp. lspci output ================================================================ 0000:00:00.0 Power PC: Freescale Semiconductor Inc Unknown device 00c6 (rev 21) 0001:01:00.0 PCI bridge: Freescale Semiconductor Inc Unknown device 00c6 (rev 21) 0001:02:00.0 Non-VGA unclassified device: Lattice Semiconductor Corporation Unknown device e250 ----------> My device ================================================================ Dmesg with CONFIG_PCI_DEBUG enable. ================================================================ Using MPC837x RDB/WLAN machine description Initializing cgroup subsys cpuset Initializing cgroup subsys cpu Linux version 2.6.35 (ok...@okapi) (gcc version 4.2.3 (Sourcery G++ Lite 4.2-171)) #13 Tue Sep 7 11:37:47 IST 2010 Found initrd at 0xcf46d000:0xcf7b15b7 Found legacy serial port 0 for /i...@e0000000/ser...@4500 mem=e0004500, taddr=e0004500, irq=0, clk=399999996, speed=0 Found legacy serial port 1 for /i...@e0000000/ser...@4600 mem=e0004600, taddr=e0004600, irq=0, clk=399999996, speed=0 bootconsole [udbg0] enabled Found FSL PCI host bridge at 0x00000000e0008500. Firmware bus number: 0->0 PCI host bridge /p...@e0008500 (primary) ranges: MEM 0x0000000090000000..0x000000009fffffff -> 0x0000000090000000 MEM 0x0000000080000000..0x000000008fffffff -> 0x0000000080000000 Prefetch IO 0x00000000e0300000..0x00000000e03fffff -> 0x0000000000000000 No pci config register base in dev tree, using default Found FSL PCI host bridge at 0x00000000e0009000. Firmware bus number: 0->255 PCI host bridge /p...@e0009000 ranges: MEM 0x00000000a8000000..0x00000000b7ffffff -> 0x00000000a8000000 IO 0x00000000b8000000..0x00000000b87fffff -> 0x0000000000000000 No pci config register base in dev tree, using default Found FSL PCI host bridge at 0x00000000e000a000. Firmware bus number: 0->255 PCI host bridge /p...@e000a000 ranges: MEM 0x00000000c8000000..0x00000000d7ffffff -> 0x00000000c8000000 IO 0x00000000d8000000..0x00000000d87fffff -> 0x0000000000000000 Top of RAM: 0x10000000, Total RAM: 0x10000000 Memory hole size: 0MB Zone PFN ranges: DMA 0x00000000 -> 0x00010000 Normal empty HighMem empty Movable zone start PFN for each node early_node_map[1] active PFN ranges 0: 0x00000000 -> 0x00010000 On node 0 totalpages: 65536 free_area_init_node: node 0, pgdat c04285e8, node_mem_map c0482000 DMA zone: 512 pages used for memmap DMA zone: 0 pages reserved DMA zone: 65024 pages, LIFO batch:15 Built 1 zonelists in Zone order, mobility grouping on. Total pages: 65024 Kernel command line: root=/dev/ram ramdisk_size=120000 rw ip=10.20.50.230:10 .20.50.70:10.20.50.50:255.255.0.0:PowerQUICC:eth0:off console=ttyS0,115200 mtdparts=nand:4m(kernel),-(jffs2) PID hash table entries: 1024 (order: 0, 4096 bytes) Dentry cache hash table entries: 32768 (order: 5, 131072 bytes) Inode-cache hash table entries: 16384 (order: 4, 65536 bytes) High memory: 0k Memory: 251884k/262144k available (4072k kernel code, 10260k reserved, 244k data, 267k bss, 192k init) Kernel virtual memory layout: * 0xfffcf000..0xfffff000 : fixmap * 0xff800000..0xffc00000 : highmem PTEs * 0xfe6f7000..0xff800000 : early ioremap * 0xd1000000..0xfe6f7000 : vmalloc & ioremap Hierarchical RCU implementation. RCU-based detection of stalled CPUs is disabled. Verbose stalled-CPUs detection is disabled. NR_IRQS:512 IPIC (128 IRQ sources) at d1000700 time_init: decrementer frequency = 99.999999 MHz time_init: processor frequency = 799.999992 MHz clocksource: timebase mult[2800000] shift[22] registered clockevent: decrementer mult[19999995] shift[32] cpu[0] Console: colour dummy device 80x25 pid_max: default: 32768 minimum: 301 Security Framework initialized SELinux: Disabled at boot. Mount-cache hash table entries: 512 Initializing cgroup subsys ns Initializing cgroup subsys cpuacct Initializing cgroup subsys devices NET: Registered protocol family 16 irq: irq 38 on host /i...@e0000000/interrupt-control...@700 mapped to virtual irq 38 __irq_set_trigger: setting type, irq = 38, flags = 8 ipic_set_irq_type function, with virq = 38, flow = 8 irq: irq 74 on host /i...@e0000000/interrupt-control...@700 mapped to virtual irq 74 __irq_set_trigger: setting type, irq = 74, flags = 8 ipic_set_irq_type function, with virq = 74, flow = 8 irq: irq 75 on host /i...@e0000000/interrupt-control...@700 mapped to virtual irq 75 __irq_set_trigger: setting type, irq = 75, flags = 8 ipic_set_irq_type function, with virq = 75, flow = 8 PCI: Probing PCI hardware pci_bus 0000:00: scanning bus pci 0000:00:00.0: found [1957:00c6] class 000b20 header type 00 pci 0000:00:00.0: reg 10: [mem 0x00000000-0x000fffff] pci 0000:00:00.0: reg 18: [mem 0x00000000-0x0fffffff 64bit pref] pci 0000:00:00.0: calling fixup_hide_host_resource_fsl+0x0/0x58 pci 0000:00:00.0: calling pcibios_fixup_resources+0x0/0x238 pci 0000:00:00.0: calling quirk_fsl_pcie_header+0x0/0x48 pci 0000:00:00.0: calling quirk_resource_alignment+0x0/0x1c0 pci 0000:00:00.0: supports D1 D2 pci 0000:00:00.0: PME# supported from D0 D1 D2 D3hot pci 0000:00:00.0: PME# disabled pci_bus 0000:00: fixups for bus pci_bus 0000:00: bus scan returning with max=00 pci_bus 0001:01: scanning bus pci 0001:01:00.0: found [1957:00c6] class 000b20 header type 01 pci 0001:01:00.0: ignoring class b20 (doesn't match header type 01) pci 0001:01:00.0: calling fixup_hide_host_resource_fsl+0x0/0x58 pci 0001:01:00.0: calling pcibios_fixup_resources+0x0/0x238 pci 0001:01:00.0: calling quirk_fsl_pcie_header+0x0/0x48 pci 0001:01:00.0: calling quirk_resource_alignment+0x0/0x1c0 pci 0001:01:00.0: supports D1 D2 pci 0001:01:00.0: PME# supported from D0 D1 D2 D3hot pci 0001:01:00.0: PME# disabled pci_bus 0001:01: fixups for bus pci 0001:01:00.0: scanning [bus 01-ff] behind bridge, pass 0 pci 0001:01:00.0: bus configuration invalid, reconfiguring pci 0001:01:00.0: scanning [bus 00-00] behind bridge, pass 1 pci_bus 0001:02: scanning bus pci 0001:02:00.0: found [1204:e250] class 000000 header type 00 pci 0001:02:00.0: reg 10: [mem 0xfffc0000-0xffffffff] pci 0001:02:00.0: reg 14: [mem 0xfffc0000-0xffffffff] pci 0001:02:00.0: calling pcibios_fixup_resources+0x0/0x238 pci 0001:02:00.0: calling quirk_resource_alignment+0x0/0x1c0 pci_bus 0001:02: fixups for bus pci 0001:01:00.0: PCI bridge to [bus 02-ff] pci 0001:01:00.0: bridge window [io 0x0000-0x0000] (disabled) pci 0001:01:00.0: bridge window [mem 0x00000000-0x000fffff] (disabled) pci 0001:01:00.0: bridge window [mem 0x00000000-0x000fffff pref] (disabled) irq: irq 1 on host /i...@e0000000/interrupt-control...@700 mapped to virtual irq 16 __irq_set_trigger: setting type, irq = 16, flags = 8 ipic_set_irq_type function, with virq = 16, flow = 8 pci_bus 0001:02: bus scan returning with max=02 pci_bus 0001:01: bus scan returning with max=02 pci_bus 0002:03: scanning bus pci_bus 0002:03: fixups for bus pci_bus 0002:03: bus scan returning with max=03 PCI->OF bus map: 0 -> 0 1 -> 0 3 -> 0 PCI: Cannot allocate resource region 0 of device 0001:02:00.0, will remap PCI: Cannot allocate resource region 1 of device 0001:02:00.0, will remap pci 0001:01:00.0: BAR 8: assigned [mem 0xa8000000-0xa80fffff] pci 0001:01:00.0: PCI bridge to [bus 02-02] pci 0001:01:00.0: bridge window [io disabled] pci 0001:01:00.0: bridge window [mem 0xa8000000-0xa80fffff] pci 0001:01:00.0: bridge window [mem pref disabled] pci_bus 0000:00: resource 0 [io 0x0000-0xfffff] pci_bus 0000:00: resource 1 [mem 0x90000000-0x9fffffff] pci_bus 0000:00: resource 2 [mem 0x80000000-0x8fffffff pref] pci_bus 0001:01: resource 0 [io 0xff7fe000-0xffffdfff] pci_bus 0001:01: resource 1 [mem 0xa8000000-0xb7ffffff] pci_bus 0001:02: resource 1 [mem 0xa8000000-0xa80fffff] pci_bus 0002:03: resource 0 [io 0xfeffc000-0xff7fbfff] pci_bus 0002:03: resource 1 [mem 0xc8000000-0xd7ffffff] Registering qe_ic with sysfs... Registering ipic with sysfs... bio: create slab <bio-0> at 0 vgaarb: loaded SCSI subsystem initialized Switching to clocksource timebase NET: Registered protocol family 2 IP route cache hash table entries: 2048 (order: 1, 8192 bytes) TCP established hash table entries: 8192 (order: 4, 65536 bytes) TCP bind hash table entries: 8192 (order: 3, 32768 bytes) TCP: Hash tables configured (established 8192 bind 8192) TCP reno registered UDP hash table entries: 256 (order: 0, 4096 bytes) UDP-Lite hash table entries: 256 (order: 0, 4096 bytes) NET: Registered protocol family 1 pci 0000:00:00.0: calling quirk_cardbus_legacy+0x0/0x44 pci 0000:00:00.0: calling quirk_usb_early_handoff+0x0/0x740 pci 0001:01:00.0: calling quirk_cardbus_legacy+0x0/0x44 pci 0001:01:00.0: calling quirk_usb_early_handoff+0x0/0x740 pci 0001:02:00.0: calling quirk_cardbus_legacy+0x0/0x44 pci 0001:02:00.0: calling quirk_usb_early_handoff+0x0/0x740 PCI: CLS 32 bytes, default 32 Trying to unpack rootfs image as initramfs... rootfs image is not initramfs (no cpio magic); looks like an initrd Freeing initrd memory: 3345k freed irq: irq 9 on host /i...@e0000000/interrupt-control...@700 mapped to virtual irq 17 __irq_set_trigger: setting type, irq = 17, flags = 8 ipic_set_irq_type function, with virq = 17, flow = 8 irq: irq 10 on host /i...@e0000000/interrupt-control...@700 mapped to virtual irq 18 __irq_set_trigger: setting type, irq = 18, flags = 8 ipic_set_irq_type function, with virq = 18, flow = 8 irq: irq 80 on host /i...@e0000000/interrupt-control...@700 mapped to virtual irq 80 __irq_set_trigger: setting type, irq = 80, flags = 8 ipic_set_irq_type function, with virq = 80, flow = 8 audit: initializing netlink socket (disabled) type=2000 audit(0.212:1): initialized JFFS2 version 2.2. (NAND) © 2001-2006 Red Hat, Inc. SGI XFS with security attributes, large block/inode numbers, no debug enabled msgmni has been set to 498 alg: No test for cipher_null (cipher_null-generic) alg: No test for ecb(cipher_null) (ecb-cipher_null) alg: No test for digest_null (digest_null-generic) alg: No test for compress_null (compress_null-generic) alg: No test for stdrng (krng) Block layer SCSI generic (bsg) driver version 0.4 loaded (major 253) io scheduler noop registered io scheduler deadline registered io scheduler cfq registered (default) Serial: 8250/16550 driver, 4 ports, IRQ sharing enabled serial8250.0: ttyS0 at MMIO 0xe0004500 (irq = 17) is a 16550A console [ttyS0] enabled, bootconsole disabled serial8250.0: ttyS1 at MMIO 0xe0004600 (irq = 18) is a 16550A brd: module loaded of_mpc8xxx_spi_probe function called. irq: irq 16 on host /i...@e0000000/interrupt-control...@700 mapped to virtual irq 19 __irq_set_trigger: setting type, irq = 19, flags = 8 ipic_set_irq_type function, with virq = 19, flow = 8 mpc8xxx_spi_probe function called. mpc8xxx_spi e0007000.spi: at 0xd1078000 (irq = 19), CPU mode irq: irq 32 on host /i...@e0000000/interrupt-control...@700 mapped to virtual irq 32 __irq_set_trigger: setting type, irq = 32, flags = 8 ipic_set_irq_type function, with virq = 32, flow = 8 irq: irq 33 on host /i...@e0000000/interrupt-control...@700 mapped to virtual irq 33 __irq_set_trigger: setting type, irq = 33, flags = 8 ipic_set_irq_type function, with virq = 33, flow = 8 irq: irq 34 on host /i...@e0000000/interrupt-control...@700 mapped to virtual irq 34 __irq_set_trigger: setting type, irq = 34, flags = 8 ipic_set_irq_type function, with virq = 34, flow = 8 eth0: Gianfar Ethernet Controller Version 1.2, 04:00:00:00:00:0a eth0: Running with NAPI enabled eth0: RX BD ring size for Q[0]: 256 eth0: TX BD ring size for Q[0]: 256 irq: irq 35 on host /i...@e0000000/interrupt-control...@700 mapped to virtual irq 35 __irq_set_trigger: setting type, irq = 35, flags = 8 ipic_set_irq_type function, with virq = 35, flow = 8 irq: irq 36 on host /i...@e0000000/interrupt-control...@700 mapped to virtual irq 36 __irq_set_trigger: setting type, irq = 36, flags = 8 ipic_set_irq_type function, with virq = 36, flow = 8 irq: irq 37 on host /i...@e0000000/interrupt-control...@700 mapped to virtual irq 37 __irq_set_trigger: setting type, irq = 37, flags = 8 ipic_set_irq_type function, with virq = 37, flow = 8 eth1: Gianfar Ethernet Controller Version 1.2, 00:00:00:00:00:00 eth1: Running with NAPI enabled eth1: RX BD ring size for Q[0]: 256 eth1: TX BD ring size for Q[0]: 256 ucc_geth: QE UCC Gigabit Ethernet Controller Freescale PowerQUICC MII Bus: probed irq: irq 17 on host /i...@e0000000/interrupt-control...@700 mapped to virtual irq 20 __irq_set_trigger: setting type, irq = 20, flags = 8 ipic_set_irq_type function, with virq = 20, flow = 8 Freescale PowerQUICC MII Bus: probed mice: PS/2 mouse device common for all mice Skipping unavailable LED gpio -19 (pwr) Skipping unavailable LED gpio -19 (hdd) TCP cubic registered NET: Registered protocol family 17 registered taskstats version 1 drivers/rtc/hctosys.c: unable to open rtc device (rtc0) RAMDISK: gzip image found at block 0 VFS: Mounted root (ext2 filesystem) on device 1:0. Freeing unused kernel memory: 192k init PHY: m...@e0024520:02 - Link is Up - 10/Half ================================================================ Regards Ravi Gupta
dmesg_log
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