Can not get PATA to work for Compact Flash with 2.6.28 kernel

[Lixin Yao]

I use a San Disk compact flash (CF) card on a board with MPC8248
processor. The CF is connected to data and address bus of the processor
and operates in TRUE IDE mode. The registers are memory mapped. I can
read the file system on the CF in u-boot (1.3.4). U-boot can identify
the CF and mount file system correctly.

The hardware is known good hardware.

I use 2.6.28 kernel and configured support for PATA for the CF.

Here is the setup in DTS file:

localbus at f0010100 {
#address-cells = <2>;
#size-cells = <1>;
compatible = "fsl,mpc8248-localbus",
"fsl,pq2-localbus",
"simple-bus";
reg = <0xf0010100 0x40>;
ranges = <0x3 0x0 0x30000000 0x10000
0x4 0x0 0x40000000 0x10000>;

pata at 3,0 {
compatible = "fsl,tr5000v2-pata", "ata-generic";
reg = <0x3 0x0 0x10 0x4 0x0 0x10>;
reg-shift = <1>;
pio-mode = <3>;
// interrupts = <23 0x8>;
// interrupt-parent = <&PIC>;
};
};


Here are some of the related CONFIG items:
#
# UBI - Unsorted block images
#
# CONFIG_MTD_UBI is not set
CONFIG_OF_DEVICE=y
CONFIG_OF_I2C=y
CONFIG_OF_SPI=y
CONFIG_OF_GPIO=y
# CONFIG_PARPORT is not set
CONFIG_BLK_DEV=y
# CONFIG_BLK_DEV_FD is not set
# CONFIG_BLK_CPQ_DA is not set
# CONFIG_BLK_CPQ_CISS_DA is not set
# CONFIG_BLK_DEV_DAC960 is not set
# CONFIG_BLK_DEV_COW_COMMON is not set
CONFIG_BLK_DEV_LOOP=y
# CONFIG_BLK_DEV_CRYPTOLOOP is not set
# CONFIG_BLK_DEV_NBD is not set
# CONFIG_BLK_DEV_SX8 is not set
CONFIG_BLK_DEV_RAM=y
CONFIG_BLK_DEV_RAM_COUNT=16
CONFIG_BLK_DEV_RAM_SIZE=4096
# CONFIG_CDROM_PKTCDVD is not set
# CONFIG_ATA_OVER_ETH is not set
# CONFIG_BLK_DEV_HD is not set
# CONFIG_MISC_DEVICES is not set
#CONFIG_HAVE_IDE=y
#CONFIG_IDE=y

#
# SCSI device support
#
# CONFIG_RAID_ATTRS is not set
CONFIG_SCSI=y
# CONFIG_SCSI_DMA is not set
# CONFIG_SCSI_NETLINK is not set
CONFIG_SCSI_PROC_FS=y
CONFIG_ATA=y
CONFIG_ATA_SFF=y
CONFIG_PATA_PLATFORM=y
CONFIG_PATA_OF_PLATFORM=y

Here is the output at console:

Kernel command line: console=ttyCPM0,38400 root=/dev/nfs rw
nfsroot=10.15.34.196
:/home/lyao01/work/target_idu_nccv3
ip=172.20.16.150:10.15.34.196:172.20.16.1:25
5.255.255.0:tr5000v2:eth0ff
......
NET: Registered protocol family 16
SCSI subsystem initialized
NET: Registered protocol family 2
IP route cache hash table entries: 1024 (order: 0, 4096 bytes)
TCP established hash table entries: 2048 (order: 2, 16384 bytes)
TCP bind hash table entries: 2048 (order: 1, 8192 bytes)
TCP: Hash tables configured (established 2048 bind 2048)
TCP reno registered
NET: Registered protocol family 1
NTFS driver 2.1.29 [Flags: R/O].
msgmni has been set to 119
alg: No test for stdrng (krng)
io scheduler noop registered
io scheduler anticipatory registered
io scheduler deadline registered (default)
f0011a80.serial: ttyCPM0 at MMIO 0xc500ea80 (irq = 16) is a CPM UART
brd: module loaded
loop: module loaded
PPP generic driver version 2.4.2
PPP Deflate Compression module registered
eth0: fs_enet: 00:00:c3:ff:7a:af
CPM2 Bitbanged MII: probed
ata_host_alloc: ENTER
ata_port_alloc: ENTER
__ata_port_freeze: ata4294967295 port frozen
scsi0 : pata_platform
ata1: PATA max PIO3 no IRQ, using PIO polling mmio cmd 0x30000000 ctl
0x40000000
ata_host_register: probe begin
ata_port_schedule_eh: port EH scheduled
ata_scsi_error: ENTER
ata_port_flush_task: ENTER
ata_eh_link_autopsy: ENTER
ata_eh_recover: ENTER
__ata_port_freeze: ata1 port frozen
ata_sff_softreset: ENTER
ata_sff_softreset: about to softreset, devmask=0
ata_bus_softreset: ata1: bus reset via SRST
ata_sff_softreset: EXIT, classes[0]=9 [1]=9
ata_eh_thaw_port: ata1 port thawed
ata_std_postreset: ENTER
ata_std_postreset: EXIT
ata_sff_postreset: EXIT, no device
ata_eh_revalidate_and_attach: ENTER
ata_eh_recover: EXIT, rc=0
ata_scsi_error: EXIT
ata_host_register: host probe begin
TCP cubic registered
NET: Registered protocol family 10
IPv6 over IPv4 tunneling driver
NET: Registered protocol family 17
RPC: Registered udp transport module.
RPC: Registered tcp transport module.
ics1893_config_init() successful
ADDRCONF(NETDEV_UP): eth0: link is not ready
ics1893_config_init() successful
IP-Config: Complete:
device=eth0, addr=172.20.16.150, mask=255.255.255.0, gw=172.20.16.1,
host=tr5000v2, domain=, nis-domain=(none),
bootserver=10.15.34.196, rootserver=10.15.34.196, rootpath=
Looking up port of RPC 100003/2 on 10.15.34.196
ADDRCONF(NETDEV_CHANGE): eth0: link becomes ready
Looking up port of RPC 100005/1 on 10.15.34.196
VFS: Mounted root (nfs filesystem).
Freeing unused kernel memory: 164k init
### Application running ...
#


The San Disk Compact Flash is not discovered.

I appreciate any insights or suggestions.

Lixin Yao
Harris Stratex Networks Inc
RTP, North Carolina, USA

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