kernel-fxtec-pro1x/arch/mips
Bruno Randolf 143ec74eb1 MIPS: MTX-1: Add udelay to mtx1_pci_idsel
Without this udelay(1) PCI idsel does not work correctly on the
"singleboard" (T-Mobile Surfbox) for the MiniPCI device. The result is
that PCI configuration fails and the MiniPCI card is not detected
correctly. Instead of

PCI host bridge to bus 0000:00
pci_bus 0000:00: root bus resource [mem 0x40000000-0x4fffffff]
pci_bus 0000:00: root bus resource [io  0x1000-0xffff]
pci 0000:00:03.0: BAR 0: assigned [mem 0x40000000-0x4000ffff]
pci 0000:00:00.0: BAR 0: assigned [mem 0x40010000-0x40010fff]
pci 0000:00:00.1: BAR 0: assigned [mem 0x40011000-0x40011fff]

We see only the CardBus device:

PCI host bridge to bus 0000:00
pci_bus 0000:00: root bus resource [mem 0x40000000-0x4fffffff]
pci_bus 0000:00: root bus resource [io  0x1000-0xffff]
pci 0000:00:00.0: BAR 0: assigned [mem 0x40000000-0x40000fff]
pci 0000:00:00.1: BAR 0: assigned [mem 0x40001000-0x40001fff]

Later the device driver shows this error:

ath5k 0000:00:03.0: cannot remap PCI memory region
ath5k: probe of 0000:00:03.0 failed with error -5

I assume that the logic chip which usually supresses the signal to the CardBus
card has some settling time and without the delay it would still let the
Cardbus interfere with the response from the MiniPCI card.

What I cannot explain is why this behaviour shows up now and not in earlier
kernel versions before. Maybe older PCI code was slower?

Signed-off-by: Bruno Randolf <br1@einfach.org>
Cc: linux-mips@linux-mips.org
Cc: manuel.lauss@googlemail.com
Cc: florian@openwrt.org
Patchwork: https://patchwork.linux-mips.org/patch/4087/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2012-08-17 10:57:27 +02:00
..
alchemy MIPS: MTX-1: Add udelay to mtx1_pci_idsel 2012-08-17 10:57:27 +02:00
ar7 arch: Use eth_random_addr 2012-07-16 22:39:25 -07:00
ath79 MIPS: ath79: Use correct IRQ number for the OHCI controller on AR7240 2012-08-17 10:57:27 +02:00
bcm47xx MIPS: BCM47xx: Fix BCMA_DRIVER_PCI_HOSTMODE config dependencies 2012-07-19 11:23:43 +02:00
bcm63xx MIPS: BCM63XX: Add 96328avng reference board 2012-07-24 16:33:14 +02:00
boot MIPS: Enable vmlinuz for JZ4740 2012-07-23 13:56:21 +01:00
cavium-octeon MIPS: Octeon: Fix broken interrupt controller code. 2012-08-17 10:57:26 +02:00
cobalt
configs Merge branches 'next/generic', 'next/alchemy', 'next/bcm63xx', 'next/cavium', 'next/jz4740', 'next/lantiq', 'next/loongson1b' and 'next/netlogic' into mips-for-linux-next 2012-07-25 16:37:46 +02:00
dec MIPS: DEC: use IS_ENABLED() 2012-07-23 13:55:54 +01:00
emma Disintegrate asm/system.h for MIPS 2012-03-28 18:30:02 +01:00
fw MIPS: Remove all -Wall and almost all -Werror usage from arch/mips. 2012-05-21 15:09:36 +01:00
include/asm MIPS: ath79: Fix number of GPIO lines for AR724[12] 2012-08-17 10:57:26 +02:00
jazz
jz4740 MIPS: JZ4740: reset: Initialize hibernate wakeup counters. 2012-07-23 13:56:20 +01:00
kernel MIPS: Loongson 2: Sort out clock managment. 2012-08-01 18:10:06 +02:00
lantiq MIPS: Lantiq: Platform specific CLK fixup 2012-08-01 17:58:09 +02:00
lasat Disintegrate asm/system.h for MIPS 2012-03-28 18:30:02 +01:00
lib MIPS: Unify memcpy.S and memcpy-inatomic.S 2012-07-23 13:55:55 +01:00
loongson MIPS: Loongson 2: Sort out clock managment. 2012-08-01 18:10:06 +02:00
loongson1 MIPS: Loongson 1: more clk support and add select HAVE_CLK 2012-08-01 17:59:23 +02:00
math-emu Disintegrate asm/system.h for MIPS 2012-03-28 18:30:02 +01:00
mipssim Disintegrate asm/system.h for MIPS 2012-03-28 18:30:02 +01:00
mm MIPS: Fixup ordering of micro assembler instructions. 2012-07-23 13:55:56 +01:00
mti-malta MIPS: PCI: Move fixups from __init to __devinit. 2012-07-19 11:27:23 +02:00
netlogic Merge branches 'next/generic', 'next/alchemy', 'next/bcm63xx', 'next/cavium', 'next/jz4740', 'next/lantiq', 'next/loongson1b' and 'next/netlogic' into mips-for-linux-next 2012-07-25 16:37:46 +02:00
oprofile Merge branches 'next/generic', 'next/alchemy', 'next/bcm63xx', 'next/cavium', 'next/jz4740', 'next/lantiq', 'next/loongson1b' and 'next/netlogic' into mips-for-linux-next 2012-07-25 16:37:46 +02:00
pci Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus 2012-07-30 11:45:52 -07:00
pmc-sierra PCI changes for the 3.6 merge window: 2012-07-24 16:17:07 -07:00
pnx833x MIPS: PNX833x: use IS_ENABLED() macro 2012-07-23 13:55:53 +01:00
pnx8550
power
powertv Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next 2012-07-24 10:01:50 -07:00
rb532 - More robust parsing especially of xattr data in JFFS2 2012-06-01 16:55:42 -07:00
sgi-ip22 Disintegrate asm/system.h for MIPS 2012-03-28 18:30:02 +01:00
sgi-ip27 mips: zero out pg_data_t when it's allocated 2012-07-31 18:42:49 -07:00
sgi-ip32 Disintegrate asm/system.h for MIPS 2012-03-28 18:30:02 +01:00
sibyte documentation: remove references to cpu_*_map. 2012-03-29 15:38:31 +10:30
sni Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus 2012-05-29 18:27:19 -07:00
txx9 MIPS: txx9: Fix redefinition of clk_* by adding select HAVE_CLK 2012-08-01 17:59:15 +02:00
vr41xx Disintegrate asm/system.h for MIPS 2012-03-28 18:30:02 +01:00
wrppmc
Kbuild
Kbuild.platforms MIPS: Loongson 1B: Add board support 2012-07-25 16:17:24 +02:00
Kconfig MIPS: ath79: select HAVE_CLK 2012-08-17 10:57:27 +02:00
Kconfig.debug Fix typo in various Kconfig file 2012-04-16 14:40:08 +02:00
Makefile Merge branch 'kbuild' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild 2012-05-28 10:32:28 -07:00