- 14 Jan, 2006 12 commits
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David Brownell authored
This adds a bitbanging parport based adaptor cable for AVR Butterfly, giving SPI links to its DataFlash chip and (eventually) firmware running in the card. Signed-off-by:
Andrew Morton <akpm@osdl.org> Signed-off-by:
Greg Kroah-Hartman <gregkh@suse.de>
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Andrew Morton authored
gcc4 generates warnings when a non-FASTCALL function pointer is assigned to a FASTCALL one. Perhaps it has taste. Cc: David Brownell <david-b@pacbell.net> Signed-off-by:
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David Brownell authored
This collects some small SPI patches that seem to be missing from the MM tree: - spi_butterfly kbuild hooks got dropped somehow; this restores them - quick fix for a (theoretical?) m25p80_write() oops noted by Andrew - quick fix for a potential config-specific oops for mtd_dataflash() - minor doc tweaks Signed-off-by:
David Brownell <dbrownell@users.sourceforge.net> Signed-off-by:
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Vitaly Wool authored
This makes the SPI core and its users access transfers in the SPI message structure as linked list not as an array, as discussed on LKML. From: David Brownell <dbrownell@users.sourceforge.net> Updates including doc, bugfixes to the list code, add spi_message_add_tail(). Plus, initialize things _before_ grabbing the locks in some cases (in case it grows more expensive). This also merges some bitbang updates of mine that didn't yet make it into the mm tree. Signed-off-by:
Vitaly Wool <vwool@ru.mvista.com> Signed-off-by:
Dmitry Pervushin <dpervushin@gmail.com> Signed-off-by:
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Mike Lavender authored
This was originally a driver for the ST M25P80 SPI flash. It's been updated slightly to handle other M25P series chips. For many of these chips, the specific type could be probed, but for now this just requires static setup with flash_platform_data that lists the chip type (size, format) and any default partitioning to use. Signed-off-by:
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David Brownell authored
This adds a bitbanging spi master, hooking up to board/adapter-specific glue code which knows how to set and read the signals (gpios etc). This code kicks in after the glue code creates a platform_device with the right platform_data. That data includes I/O loops, which will usually come from expanding an inline function (provided in the header). One goal is that the I/O loops should be easily optimized down to a few GPIO register accesses, in common cases, for speed and minimized overhead. This understands all the currently defined protocol tweaking options in the SPI framework, and might eventually serve as as reference implementation. - different word sizes (1..32 bits) - differing clock rates - SPI modes differing by CPOL (affecting chip select and I/O loops) - SPI modes differing by CPHA (affecting I/O loops) - delays (usecs) after transfers - temporarily deselecting chips in mid-transfer A lot of hardware could work with this framework, though common types of controller can't reach peak performance without switching to a driver structure that supports pipelining of transfers (e.g. DMA queues) and maybe controllers (e.g. IRQ driven). Signed-off-by:
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David Brownell authored
This updates the ads7864 driver to use the new "spi_driver" struct, and includes some minor unrelated cleanup. Signed-off-by:
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David Brownell authored
This includes various updates to the SPI core: - Fixes a driver model refcount bug in spi_unregister_master() paths. - The spi_master structures now have wrappers which help keep drivers from needing class-level get/put for device data or for refcounts. - Check for a few setup errors that would cause oopsing later. - Docs say more about memory management. Highlights the use of DMA-safe i/o buffers, and zero-initializing spi_message and such metadata. - Provide a simple alloc/free for spi_message and its spi_transfer; this is only one of the possible memory management policies. Nothing to break code that already works. Signed-off-by: -
David Brownell authored
This is a refresh of the "Simple SPI Framework" found in 2.6.15-rc3-mm1 which makes the following changes: * There's now a "struct spi_driver". This increase the footprint of the core a bit, since it now includes code to do what the driver core was previously handling directly. Documentation and comments were updated to match. * spi_alloc_master() now does class_device_initialize(), so it can at least be refcounted before spi_register_master(). To match, spi_register_master() switched over to class_device_add(). * States explicitly that after transfer errors, spi_devices will be deselected. We want fault recovery procedures to work the same for all controller drivers. * Minor tweaks: controller_data no longer points to readonly data; prevent some potential cast-from-null bugs with container_of calls; clarifies some existing kerneldoc, And a few small cleanups. Signed-off-by: -
David Brownell authored
This is a conversion of the AT91rm9200 DataFlash MTD driver to use the lightweight SPI framework, and no longer be AT91-specific. It compiles down to less than 3KBytes on ARM. The driver allows board-specific init code to provide platform_data with the relevant MTD partitioning information, and hotplugs. This version has been lightly tested. Its parent at91_dataflash driver has been pretty well banged on, although kernel.org JFFS2 dataflash support was acting broken the last time I tried it. Signed-off-by:
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David Brownell authored
This is a driver for the ADS7846 touchscreen sensor, derived from the corgi_ts and omap_ts drivers. Key differences from those two: - Uses the new SPI framework (minimalist version) - <linux/spi/ads7846.h> abstracts board-specific touchscreen info - Sysfs attributes for the temperature and voltage sensors - Uses fewer ARM-specific IRQ primitives The temperature and voltage sensors show up in sysfs like this: $ pwd /sys/devices/platform/omap-uwire/spi2.0 $ ls bus@ input:event0@ power/ temp1 vbatt driver@ modalias temp0 vaux $ cat modalias ads7846 $ cat temp0 991 $ cat temp1 1177 $ So far only basic testing has been done. There's a fair amount of hardware that uses this sensor, and which also runs Linux, which should eventually be able to use this driver. One portability note may be of special interest. It turns out that not all SPI controllers are happy issuing requests that do things like "write 8 bit command, read 12 bit response". Most of them seem happy to handle various word sizes, so the issue isn't "12 bit response" but rather "different rx and tx write sizes", despite that being a common MicroWire convention. So this version of the driver no longer reads 12 bit native-endian words; it reads 16-bit big-endian responses, then byteswaps them and shifts the results to discard the noise. Signed-off-by:
David Brownell <david-b@pacbell.net> Signed-off-by:
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David Brownell authored
This is the core of a small SPI framework, implementing the model of a queue of messages which complete asynchronously (with thin synchronous wrappers on top). - It's still less than 2KB of ".text" (ARM). If there's got to be a mid-layer for something so simple, that's the right size budget. :) - The guts use board-specific SPI device tables to build the driver model tree. (Hardware probing is rarely an option.) - This version of Kconfig includes no drivers. At this writing there are two known master controller drivers (PXA/SSP, OMAP MicroWire) and three protocol drivers (CS8415a, ADS7846, DataFlash) with LKML mentions of other drivers in development. - No userspace API. There are several implementations to compare. Implement them like any other driver, and bind them with sysfs. The changes from last version posted to LKML (on 11-Nov-2005) are minor, and include: - One bugfix (removes a FIXME), with the visible effect of making device names be "spiB.C" where B is the bus number and C is the chipselect. - The "caller provides DMA mappings" mechanism now has kerneldoc, for DMA drivers that want to be fancy. - Hey, the framework init can be subsys_init. Even though board init logic fires earlier, at arch_init ... since the framework init is for driver support, and the board init support uses static init. - Various additional spec/doc clarifications based on discussions with other folk. It adds a brief "thank you" at the end, for folk who've helped nudge this framework into existence. As I've said before, I think that "protocol tweaking" is the main support that this driver framework will need to evolve. From: Mark Underwood <basicmark@yahoo.com> Update the SPI framework to remove a potential priority inversion case by reverting to kmalloc if the pre-allocated DMA-safe buffer isn't available. Signed-off-by:
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- 13 Jan, 2006 2 commits
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Paul Mackerras authored
On PowerPC, we want to be able to provide an AT_PLATFORM aux table entry to userspace, so that glibc can choose optimized libraries for the processor we're running on. Unfortunately that would be the 21st aux table entry on powerpc, meaning that the aux table including the terminating null entry would overflow the mm->saved_auxv[] array, leading to userland programs segfaulting. This increases the size of the mm->saved_auxv array to be large enough to accommodate an AT_PLATFORM entry on powerpc. Signed-off-by:
Paul Mackerras <paulus@samba.org> Signed-off-by:
Linus Torvalds <torvalds@osdl.org>
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Evgeniy authored
There's a lack of parenthesis in fs/ufs/utils.h, so instead of the 512th byte of buffer, the usb2 pointer will point to the nth structure of type ufs_super_block_second. This can cause a mount-time oops if you're unlucky (especially with DEBUG_PAGEALLOC, which is how Alexey Dobriyan saw this problem) Signed-off-by:
Evgeniy Dushistov <dushistov@mail.ru> Acked-by:
Alexey Dobriyan <adobriyan@gmail.com> Signed-off-by:
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- 12 Jan, 2006 26 commits
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Linus Torvalds authored
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John W. Linville authored
At least some versions of the via-velocity hardware only support checksumming IPv4 frames in hardware. However, the driver is currently setting the NETIF_F_HW_CSUM flag, which indicates support for more than just IPv4. This results in errors when trying to use IPv6 over via-velocity hardware. Signed-off-by:
John W. Linville <linville@tuxdriver.com> Signed-off-by:
Jeff Garzik <jgarzik@pobox.com>
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Johannes Berg authored
The comments in ieee80211.h claim that one doesn't need to set the len parameter of the stats struct. But if one doesn't, the management frames are read far over the memory they actually occupy causing badness. Signed-Off-By:
Johannes Berg <johannes@sipsolutions.net> Signed-off-by:
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Jay Vosburgh authored
I believe I see the race Michael refers to (tlb_choose_channel may set head, which tlb_init_slave clears), although I was not able to reproduce it. I have updated his patch for the current netdev-2.6.git tree and added a version update. His original comment follows: Our systems have been crashing during testing of PCI HotPlug support in the various networking components. We've faulted in the bonding driver due to a bug in bond_alb.c:tlb_clear_slave() In that routine, the last modification to the TLB hash table is made without protection of the lock, allowing a race that can lead tlb_choose_channel() to select an invalid table element. -J Signed-off-by: -
Dan Williams authored
This patch allows the Atmel driver to work correctly with wpa_supplicant and other programs that require some conformance with WEXT-18. It should not affect current behavior of the driver. The patch does four things: 1) Implements SIOCSIWENCODEEXT, SIOCGIWENCODEEXT, SIOCSIWAUTH, and SIOCGIWAUTH calls for unencrypted and WEP operation 2) Accepts zero-filled addresses for SIOCSIWAP, which are legal and should turn off any previous forced WAP address 3) Sends association and de-association events to userspace at most of the appropriate times 4) Fixes erroneous order of CIPHER_SUITE_WEP_* arguments in one location which are actually unused anyway Signed-off-by:
Dan Williams <dcbw@redhat.com> Signed-off-by:
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Eric Sesterhenn / snakebyte authored
Replace the MODULE_PARM usage in uli526x.c with module_param. Signed-off-by:
Eric Sesterhenn <snakebyte@gmx.de> Signed-off-by:
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Kumar Gala authored
Make the driver produce the string used by phy_connect and have board specific code pass the integer mii bus id and phy device id for the specific controller instance. Signed-off-by:
Kumar Gala <galak@kernel.crashing.org> Signed-off-by:
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Kumar Gala authored
Add the PHY_ID_FMT macro to ensure that the format of the id string used by a driver to match to its specific phy is consistent between the mdio_bus and the driver. Signed-off-by:
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Kumar Gala authored
We can now have the gianfar mii platform device have a proper resource for the IO memory region for its registers. Previously we passed this information that the platform_data structure because we couldn't handle overlapping memory regions for platform devices. Signed-off-by:
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Kumar Gala authored
Missing include of <linux/in.h> to get definition of IPPROTO_UDP. Signed-off-by:
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dann frazier authored
airo.c currently has MICSUPPORT enabled, which requires CONFIG_CRYPTO. A user reported a build failure which is due to the lack of a Kconfig dependency. See http://bugs.debian.org/344205. This patch makes Kconfig enforce this dependency. Signed-off-by:
dann frazier <dannf@debian.org> Signed-off-by:
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ODonnell, Michael authored
We have identified two related bugs in the e100 driver. Both bugs are related to manipulation of the MDI control register. The first problem is that the Ready bit is being ignored when writing to the Control register; we noticed this because the Linux bonding driver would occasionally come to the spurious conclusion that the link was down when querying Link State. It turned out that by failing to wait for a previous command to complete it was selecting what was essentially a random register in the MDI register set. When we added code that waits for the Ready bit (as shown in the patch file below) all such problems ceased. The second problem is that, although access to the MDI registers involves multiple steps which must not be intermixed, nothing was defending against two or more threads attempting simultaneous access. The most obvious situation where such interference could occur involves the watchdog versus ioctl paths, but there are probably others, so we recommend the locking shown in our patch file. Signed-off-by:
Michael O'Donnell <Michael.ODonnell@stratus.com> Cc: "David S. Miller" <davem@davemloft.net> Cc: Jeff Garzik <jgarzik@pobox.com> Cc: John Ronciak <john.ronciak@intel.com> Cc: Ganesh Venkatesan <ganesh.venkatesan@intel.com> Cc: Jesse Brandeburg <jesse.brandeburg@intel.com> Signed-off-by:
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Linus Torvalds authored
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Linus Torvalds authored
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Linus Torvalds authored
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Jens Axboe authored
There's a problem with the REQ_BLOCK_PC handling as well (bad ->data_len handling) where it could actually complete a request ahead of time. I suggest we just back this out for now, I will resubmit it later when I'm fully confident in it. This reverts commit 8672d571Signed-off-by:
Jens Axboe <axboe@suse.de> Signed-off-by:
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Arjan van de Ven authored
Turn several drivers/serial/ semaphores-used-as-mutex into mutexes Signed-off-by:
Arjan van de Ven <arjan@infradead.org> Signed-off-by:
Russell King <rmk+kernel@arm.linux.org.uk>
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Arjan van de Ven authored
convert mfd and mmc to mutexes Signed-off-by:
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Arjan van de Ven authored
The arm clock semaphores are strict mutexes, convert them to the new mutex implementation Signed-off-by:
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Linus Torvalds authored
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git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc-mergeLinus Torvalds authored
Fix up delete/modify conflict of arch/ppc/kernel/process.c by hand (it's gone, gone, gone). Signed-off-by: -
Dominik Brodowski authored
With the "power/state" sysfs interface being deprecated, make another one available which is compatible to what was discussed on the linux PM mailinglist. Signed-off-by:Dominik Brodowski <linux@dominikbrodowski.net>
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Dominik Brodowski authored
Add IDs for Sierra Aircard 55 CDMA 1xrtt Modem -- a CIS update is required for this card. Signed-off-by: -
Russell King authored
This is part of a patch from Marc Singer to allow r2 to be passed to the kernel. Marc's original comments follow: This revised R2 (atags pointer) patch incorporates comments from Nico Pitre and Ben Dooks. It modifies the head.S files such that the R2 value set by the bootloader is conveyed to the kernel startup code. The kernel head.S heuristically validates the pointer. It will set R2 to zero if it believes the pointer is invalid. Presently, it requires that the ATAGS list reside in the first 16KiB of physical RAM. Relaxing this contraint may be both desirable as well as tricky. Signed-off-by:
Marc Singer <elf@buici.com> Signed-off-by:
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