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2008-10-18dmar: fix uninitialised 'ret' variable in dmar_parse_dev()David Woodhouse
This was introduced by commit 1886e8a90a580f3ad343f2065c84c1b9e1dac9ef ("x64, x2apic/intr-remap: code re-structuring, to be used by both DMA and Interrupt remapping"). It was causing bogus results to be returned from dmar_parse_dev() when the first unit with the INCLUDE_ALL flag was processed. Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2008-10-18intel-iommu: use coherent_dma_mask in alloc_coherentFUJITA Tomonori
This patch fixes intel-iommu to use dev->coherent_dma_mask in alloc_coherent. Currently, intel-iommu uses dev->dma_mask in alloc_coherent but alloc_coherent is supposed to use coherent_dma_mask. It could break drivers that uses smaller coherent_dma_mask than dma_mask (though the current code works for the majority that use the same mask for coherent_dma_mask and dma_mask). [dwmw2: dma_mask can be bigger than 'unsigned long'] Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Reviewed-by: Grant Grundler <grundler@parisc-linux.org> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2008-10-18intel-iommu: IA64 supportFenghua Yu
The current Intel IOMMU code assumes that both host page size and Intel IOMMU page size are 4KiB. The first patch supports variable page size. This provides support for IA64 which has multiple page sizes. This patch also adds some other code hooks for IA64 platform including DMAR_OPERATION_TIMEOUT definition. [dwmw2: some cleanup] Signed-off-by: Fenghua Yu <fenghua.yu@intel.com> Signed-off-by: Tony Luck <tony.luck@intel.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2008-10-17dmar: remove the quirk which disables dma-remapping when intr-remapping enabledYouquan Song
Now that we have DMA-remapping support for queued invalidation, we can enable both DMA-remapping and interrupt-remapping at the same time. Signed-off-by: Youquan Song <youquan.song@intel.com> Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2008-10-17dmar: Use queued invalidation interface for IOTLB and context invalidationYouquan Song
If queued invalidation interface is available and enabled, queued invalidation interface will be used instead of the register based interface. According to Vt-d2 specification, when queued invalidation is enabled, invalidation command submit works only through invalidation queue and not through the command registers interface. Signed-off-by: Youquan Song <youquan.song@intel.com> Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2008-10-17dmar: context cache and IOTLB invalidation using queued invalidationYouquan Song
Implement context cache invalidate and IOTLB invalidation using queued invalidation interface. This interface will be used by DMA remapping, when queued invalidation is supported. Signed-off-by: Youquan Song <youquan.song@intel.com> Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2008-10-17dmar: use spin_lock_irqsave() in qi_submit_sync()Suresh Siddha
Next patch in the series will use queued invalidation interface qi_submit_sync() for DMA-remapping aswell, which can be called from interrupt context. So use spin_lock_irqsave() instead of spin_lock() in qi_submit_sync(). Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com> Signed-off-by: Youquan Song <youquan.song@intel.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
2008-10-16{pci,pnp} quirks.c: don't use deprecated print_fn_descriptor_symbol()Linus Torvalds
I dunno how this missed Bjorn and his quest to use %pF in commit c80cfb0406c01bb5da91bfe30f5cb1fd96831138 ("vsprintf: use new vsprintf symbolic function pointer format"), but it did. So use %pF in the two remaining places that still tried to print out function pointers by hand. Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-10-16Merge branch 'kvm-updates/2.6.28' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/avi/kvm * 'kvm-updates/2.6.28' of git://git.kernel.org/pub/scm/linux/kernel/git/avi/kvm: (134 commits) KVM: ia64: Add intel iommu support for guests. KVM: ia64: add directed mmio range support for kvm guests KVM: ia64: Make pmt table be able to hold physical mmio entries. KVM: Move irqchip_in_kernel() from ioapic.h to irq.h KVM: Separate irq ack notification out of arch/x86/kvm/irq.c KVM: Change is_mmio_pfn to kvm_is_mmio_pfn, and make it common for all archs KVM: Move device assignment logic to common code KVM: Device Assignment: Move vtd.c from arch/x86/kvm/ to virt/kvm/ KVM: VMX: enable invlpg exiting if EPT is disabled KVM: x86: Silence various LAPIC-related host kernel messages KVM: Device Assignment: Map mmio pages into VT-d page table KVM: PIC: enhance IPI avoidance KVM: MMU: add "oos_shadow" parameter to disable oos KVM: MMU: speed up mmu_unsync_walk KVM: MMU: out of sync shadow core KVM: MMU: mmu_convert_notrap helper KVM: MMU: awareness of new kvm_mmu_zap_page behaviour KVM: MMU: mmu_parent_walk KVM: x86: trap invlpg KVM: MMU: sync roots on mmu reload ...
2008-10-16Merge branch 'core-v28-for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip * 'core-v28-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: do_generic_file_read: s/EINTR/EIO/ if lock_page_killable() fails softirq, warning fix: correct a format to avoid a warning softirqs, debug: preemption check x86, pci-hotplug, calgary / rio: fix EBDA ioremap() IO resources, x86: ioremap sanity check to catch mapping requests exceeding, fix IO resources, x86: ioremap sanity check to catch mapping requests exceeding the BAR sizes softlockup: Documentation/sysctl/kernel.txt: fix softlockup_thresh description dmi scan: warn about too early calls to dmi_check_system() generic: redefine resource_size_t as phys_addr_t generic: make PFN_PHYS explicitly return phys_addr_t generic: add phys_addr_t for holding physical addresses softirq: allocate less vectors IO resources: fix/remove printk printk: robustify printk, update comment printk: robustify printk, fix #2 printk: robustify printk, fix printk: robustify printk Fixed up conflicts in: arch/powerpc/include/asm/types.h arch/powerpc/platforms/Kconfig.cputype manually.
2008-10-16Merge branch 'for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/ieee1394/linux1394-2.6 * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ieee1394/linux1394-2.6: firewire: Add more documentation to firewire-cdev.h firewire: fix ioctl() return code firewire: fix setting tag and sy in iso transmission firewire: fw-sbp2: fix another small generation access bug firewire: fw-sbp2: enforce s/g segment size limit firewire: fw_send_request_sync() ieee1394: survive a few seconds connection loss ieee1394: nodemgr clean up class iterators ieee1394: dv1394, video1394: remove unnecessary expressions ieee1394: raw1394: make write() thread-safe ieee1394: raw1394: narrow down the state_mutex protected region ieee1394: raw1394: replace BKL by local mutex, make ioctl() and mmap() thread-safe ieee1394: sbp2: enforce s/g segment size limit ieee1394: sbp2: check for DMA mapping failures ieee1394: sbp2: stricter dma_sync ieee1394: Use DIV_ROUND_UP
2008-10-16Merge branch 'agp-next' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/airlied/agp-2.6 * 'agp-next' of git://git.kernel.org/pub/scm/linux/kernel/git/airlied/agp-2.6: agp/nvidia: Support agp user-memory on nvidia agp. agp/amd-k7: Suspend support for AMD K7 GART driver agp/intel: Reduce extraneous PCI posting reads during init agp: Fix stolen memory counting on G4X.
2008-10-16Merge git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core-2.6Linus Torvalds
* git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core-2.6: (46 commits) UIO: Fix mapping of logical and virtual memory UIO: add automata sercos3 pci card support UIO: Change driver name of uio_pdrv UIO: Add alignment warnings for uio-mem Driver core: add bus_sort_breadthfirst() function NET: convert the phy_device file to use bus_find_device_by_name kobject: Cleanup kobject_rename and !CONFIG_SYSFS kobject: Fix kobject_rename and !CONFIG_SYSFS sysfs: Make dir and name args to sysfs_notify() const platform: add new device registration helper sysfs: use ilookup5() instead of ilookup5_nowait() PNP: create device attributes via default device attributes Driver core: make bus_find_device_by_name() more robust usb: turn dev_warn+WARN_ON combos into dev_WARN debug: use dev_WARN() rather than WARN_ON() in device_pm_add() debug: Introduce a dev_WARN() function sysfs: fix deadlock device model: Do a quickcheck for driver binding before doing an expensive check Driver core: Fix cleanup in device_create_vargs(). Driver core: Clarify device cleanup. ...
2008-10-16Merge git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux-2.6-for-linusLinus Torvalds
* git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux-2.6-for-linus: module: remove CONFIG_KMOD in comment after #endif remove CONFIG_KMOD from fs remove CONFIG_KMOD from drivers Manually fix conflict due to include cleanups in drivers/md/md.c
2008-10-16Merge branch 'for-linus' of git://neil.brown.name/mdLinus Torvalds
* 'for-linus' of git://neil.brown.name/md: md: fix input truncation in safe_delay_store() md: check for memory allocation failure in faulty personality md: build failure due to missing delay.h md: Relax minimum size restrictions on chunk_size. md: remove space after function name in declaration and call. md: Remove unnecessary #includes, #defines, and function declarations. md: Convert remaining 1k representations in linear.c to sectors. md: linear.c: Make two local variables sector-based. md: linear: Represent dev_info->size and dev_info->offset in sectors. md: linear.c: Remove broken debug code. md: linear.c: Remove pointless initialization of curr_offset. md: linear.c: Fix typo in comment. md: Don't try to set an array to 'read-auto' if it is already in that state. md: Allow metadata_version to be updated for externally managed metadata. md: Fix rdev_size_store with size == 0
2008-10-16Merge branch 'for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input: (32 commits) Input: wm97xx - update email address for Liam Girdwood Input: i8042 - add Thinkpad R31 to nomux list Input: move map_to_7segment.h to include/linux Input: ads7846 - fix cache line sharing issue Input: cm109 - add missing newlines to messages Input: document i8042.debug in kernel-parameters.txt Input: keyboard - fix potential out of bound access to key_map Input: psmouse - add OLPC touchpad driver Input: psmouse - tweak PSMOUSE_DEFINE_ATTR to support raw set callbacks Input: psmouse - add psmouse_queue_work() for ps/2 extension to make use of Input: psmouse - export psmouse_set_state for ps/2 extensions to use Input: ads7846 - introduce .gpio_pendown to get pendown state Input: ALPS - add signature for DualPoint found in Dell Latitude E6500 Input: serio_raw - allow attaching to translated (SERIO_I8042XL) ports Input: cm109 - don't use obsolete logging macros Input: atkbd - expand Latitude's force release quirk to other Dells Input: bf54x-keys - add power management support Input: atmel_tsadcc - improve accuracy Input: convert drivers to use strict_strtoul() Input: appletouch - handle geyser 3/4 status bits ...
2008-10-16rtc: rtc-ds1286 and rtc-m48t35 need <linux/io.h>Geert Uytterhoeven
With m68k allmodconfig, I get: | drivers/rtc/rtc-ds1286.c: In function 'ds1286_rtc_read': | drivers/rtc/rtc-ds1286.c:33: error: implicit declaration of function '__raw_readl' | drivers/rtc/rtc-ds1286.c: In function 'ds1286_rtc_write': | drivers/rtc/rtc-ds1286.c:38: error: implicit declaration of function '__raw_writel' | drivers/rtc/rtc-ds1286.c: In function 'ds1286_probe': | drivers/rtc/rtc-ds1286.c:345: error: implicit declaration of function 'ioremap' | drivers/rtc/rtc-ds1286.c:345: warning: assignment makes pointer from integer without a cast | drivers/rtc/rtc-ds1286.c:365: error: implicit declaration of function 'iounmap' and | drivers/rtc/rtc-m48t35.c: In function 'm48t35_read_time': | drivers/rtc/rtc-m48t35.c:59: error: implicit declaration of function 'readb' | drivers/rtc/rtc-m48t35.c:60: error: implicit declaration of function 'writeb' | drivers/rtc/rtc-m48t35.c: In function 'm48t35_probe': | drivers/rtc/rtc-m48t35.c:168: error: implicit declaration of function 'ioremap' | drivers/rtc/rtc-m48t35.c:168: warning: assignment makes pointer from integer without a cast | drivers/rtc/rtc-m48t35.c:188: error: implicit declaration of function 'iounmap' Include <linux/io.h> to get access to the I/O API. Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org> Acked-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-10-16Merge branch 'for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/jikos/hid * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/hid: HID: blacklist additional SoundGraph iMon LCD models HID: fix/improve help texts for quirk drivers HID: fix default building of HID-quirk drivers
2008-10-16Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6Linus Torvalds
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6: (26 commits) decnet: Fix compiler warning in dn_dev.c IPV6: Fix default gateway criteria wrt. HIGH/LOW preference radv option net/802/fc.c: Fix compilation warnings netns: correct mib stats in ip6_route_me_harder() netns: fix net_generic array leak rt2x00: fix regression introduced by "mac80211: free up 2 bytes in skb->cb" rtl8187: Add USB ID for Belkin F5D7050 with RTL8187B chip p54usb: Device ID updates mac80211: fixme for kernel-doc ath9k/mac80211: disallow fragmentation in ath9k, report to userspace libertas : Remove unused variable warning for "old_channel" from cmd.c mac80211: Fix scan RX processing oops orinoco: fix unsafe locking in spectrum_cs_suspend orinoco: fix unsafe locking in orinoco_cs_resume cfg80211: fix debugfs error handling mac80211: fix debugfs netdev rename iwlwifi: fix ct kill configuration for 5350 mac80211: fix HT information element parsing p54: Fix compilation problem on PPC mac80211: fix debugfs lockup ...
2008-10-16Merge branch 'for-linus' of master.kernel.org:/home/rmk/linux-2.6-armLinus Torvalds
* 'for-linus' of master.kernel.org:/home/rmk/linux-2.6-arm: (51 commits) [ARM] 5308/1: Fix Viper ISA IRQ handling [ARM] 5307/1: pxa: fix CM-X2XX PCMCIA build error [ARM] 5306/1: pxa: fix build error on CM-X270 [ARM] 5302/1: ARM: OMAP: Revert omap3 WDT changes to avoid merge conflict [ARM] 5305/1: ARM: OMAP: Fix compile of McBSP by removing unnecessary check [ARM] 5301/1: ARM: OMAP: Add missing irq defines ARM: OMAP3: Add default kernel config for OMAP LDP ARM: OMAP3: Add basic board support for OMAP LDP ARM: OMAP3: Defconfig for the Gumstix Overo board (rev 3) ARM: OMAP3: Add support for the Gumstix Overo board (rev 3) ARM: OMAP3: Add Beagle defconfig ARM: OMAP3: Add minimal Beagle board support ARM: OMAP3: Add minimal omap3430 support ARM: OMAP2: Fix sparse, checkpatch warnings in OMAP2/3 IRQ code ARM: OMAP: Fixes to omap_mcbsp_request function ARM: OMAP: Add support for OMAP2430 in McBSP ARM: OMAP: Add support for McBSP devices 3 - 5 on 34xx ARM: OMAP: Allocate McBSP devices dynamically Fix sections for omap-mcbsp platform driver [ARM] S3C24XX: Additional include moves ...
2008-10-16drivers/net/xen-netfront.c: Use DIV_ROUND_UPJulia Lawall
The kernel.h macro DIV_ROUND_UP performs the computation (((n) + (d) - 1) / (d)) but is perhaps more readable. An extract of the semantic patch that makes this change is as follows: (http://www.emn.fr/x-info/coccinelle/) // <smpl> @haskernel@ @@ #include <linux/kernel.h> @depends on haskernel@ expression n,d; @@ ( - (n + d - 1) / d + DIV_ROUND_UP(n,d) | - (n + (d - 1)) / d + DIV_ROUND_UP(n,d) ) @depends on haskernel@ expression n,d; @@ - DIV_ROUND_UP((n),d) + DIV_ROUND_UP(n,d) @depends on haskernel@ expression n,d; @@ - DIV_ROUND_UP(n,(d)) + DIV_ROUND_UP(n,d) // </smpl> Signed-off-by: Julia Lawall <julia@diku.dk> Acked-by: Jeremy Fitzhardinge <jeremy@goop.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-10-16make hp_wmi_notify() staticAdrian Bunk
Make the needlessly global hp_wmi_notify() static. Signed-off-by: Adrian Bunk <bunk@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-10-16resource: add resource_type() and IORESOURCE_TYPE_BITSMagnus Damm
Add resource_type() and IORESOURCE_TYPE_BITS. They make it easier to add more resource types without having to rewrite tons of code. Signed-off-by: Magnus Damm <damm@igel.co.jp> Cc: Ben Dooks <ben-linux@fluff.org> Cc: Jean Delvare <khali@linux-fr.org> Cc: Paul Mundt <lethal@linux-sh.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-10-16GRU driver: minor updatesJack Steiner
A few minor updates for the GRU driver. - documentation changes found in code reviews - changes to #ifdefs to make them recognized by "unifdef" (used in simulator testing) - change GRU context load/unload to prefetch data [akpm@linux-foundation.org: fix typo in comment] Signed-off-by: Jack Steiner <steiner@sgi.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-10-16w1: new driver. DS2431 chipBernhard Weirich
[akpm@linux-foundation.org: minor fixlets and cleanups] Signed-off-by: Bernhard Weirich <bernhard.weirich@riedel.net> Signed-off-by: Evgeniy Polyakov <johnpol@2ka.mipt.ru> Cc: Ben Gardner <bgardner@wabtec.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-10-16W1: ds2490.c optimize ds_set_pullupDavid Fries
Optimize the ds_set_pullup function. For a strong pullup to be sent the ds2490 has to have both the strong pullup mode enabled, and the specific write operation has to have the SPU bit enabled. Previously the write always had the SPU bit enabled and both the duration and model was set when a strong pullup was requested. Now the strong pullup mode is enabled at initialization time, the delay is updated only when the value changes, and the write SPU bit is set only when a strong pullup is required. This removes two or three bus transactions per strong pullup request. Signed-off-by: David Fries <david@fries.net> Signed-off-by: Evgeniy Polyakov <johnpol@2ka.mipt.ru> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-10-16W1: ds2490.c ds_write_block remove extra ds_wait_statusDavid Fries
Drop the extra ds_wait_status() in ds_write_block(). Signed-off-by: David Fries <david@fries.net> Signed-off-by: Evgeniy Polyakov <johnpol@2ka.mipt.ru> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-10-16W1: ds2490.c magic number workDavid Fries
This replaces some magic numbers with marcos and corrects one marco. Signed-off-by: David Fries <david@fries.net> Signed-off-by: Evgeniy Polyakov <johnpol@2ka.mipt.ru> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-10-16W1: ds2490.c reset ds2490 in initDavid Fries
Reset the device in init as it can be in a bad state. This is necessary because a block write will wait for data to be placed in the output buffer and block any later commands which will keep accumulating and the device will not be idle. Another case is removing the ds2490 module while a bus search is in progress, somehow a few commands get through, but the input transfers fail leaving data in the input buffer. This will cause the next read to fail see the note in ds_recv_data. Signed-off-by: David Fries <david@fries.net> Signed-off-by: Evgeniy Polyakov <johnpol@2ka.mipt.ru> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-10-16W1: ds2490.c ds_reset remove ds_wait_statusDavid Fries
ds_reset no longer calls ds_wait_status, the result wasn't used and it would only delay the following data operations. Signed-off-by: David Fries <david@fries.net> Signed-off-by: Evgeniy Polyakov <johnpol@2ka.mipt.ru> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-10-16W1: ds2490.c ds_dump_status reworkDavid Fries
- add result register #defines - rename ds_dump_status to ds_print_msg - rename ds_recv_status to ds_dump_status - ds_dump_status prints the requested status and no longer reads the status, this is because the second status read can return different data for example the result register - the result register will be printed, though limited to detecting a new device, detecting other values such as a short would require additional reporting methods - ST_EPOF was moved to ds_wait_status to clear the error condition sooner Signed-off-by: David Fries <david@fries.net> Signed-off-by: Evgeniy Polyakov <johnpol@2ka.mipt.ru> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-10-16W1: ds2490.c simplify and fix ds_touch_bitDavid Fries
Simplify and fix ds_touch_bit. If a device is attached in the middle of a bus search the status register will return more than the default 16 bytes. The additional bytes indicate that it has detected a new device. The way ds_wait_status is coded, if it doesn't read 16 status bytes it returns an error value. ds_touch_bit then will detect that error and return an error. In that case it doesn't read the input buffer and returns uninitialized data. It doesn't stop there. The next transaction will not expect the extra byte in the input buffer and the short read will cause an error and clear out both the old byte and new data in the input buffer. Just ignore the value of ds_wait_status. It is still required to wait until ds2490 is again idle and there is data to read when ds_recv_data is called. This also removes the while loop. None of the other commands wait and verify that the issued command is in the status register. Signed-off-by: David Fries <david@fries.net> Signed-off-by: Evgeniy Polyakov <johnpol@2ka.mipt.ru> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-10-16W1: ds2490.c disable bit read and writeDavid Fries
Don't export read and write bit operations, they didn't work, they weren't used, and they can't be made to work. The one wire low level bit operations expect to set high or low levels, the ds2490 hardware only supports complete read or write time slots, better to just comment them out. Signed-off-by: David Fries <david@fries.net> Signed-off-by: Evgeniy Polyakov <johnpol@2ka.mipt.ru> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-10-16W1: ds2490.c ds_write_bit, grouping error, disable readbackDavid Fries
ds_write_bit doesn't read the input buffer, so add COMM_ICP and a comment that it will no longer generate a read back data byte. If there is an extra data byte later on then it will cause an error and discard what data was there. Corrected operator ordering for ds_send_control. Signed-off-by: David Fries <david@fries.net> Signed-off-by: Evgeniy Polyakov <johnpol@2ka.mipt.ru> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-10-16W1: ds2490.c add support for strong pullupDavid Fries
Add strong pullup support for ds2490 driver, also drop mdelay(750), which busy waits, usage in favour of msleep for long delays. Now with msleep only being called when the strong pullup is active, one wire bus operations are only taking minimal system overhead. The new set_pullup will only enable the strong pullup when requested, which is expected to be the only write operation that will benefit from a strong pullup. Signed-off-by: David Fries <david@fries.net> Signed-off-by: Evgeniy Polyakov <johnpol@2ka.mipt.ru> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-10-16W1: ds2490.c correct print messageDavid Fries
Corrected print message, it was writing not reading, this also prints the endpoint used for the write instead of hardcoding it. Failed to write 1-wire data to ep0x%x: err=%d. Signed-off-by: David Fries <david@fries.net> Signed-off-by: Evgeniy Polyakov <johnpol@2ka.mipt.ru> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-10-16W1: ds1wm.c msleep for resetDavid Fries
Like the previous w1_io.c reset coments and msleep patch, I don't have the hardware to verify the change, but I think it is safe. It also helps to see a comment like this in the code. "We'll wait a bit longer just to be sure." If they are going to calculate delaying 324.9us, but actually delay 500us, why not just give up the CPU and sleep? This is designed for a battery powered ARM system, avoiding busywaiting has to be good for battery life. I sent a request for testers March 7, 2008 to the Linux kernel mailing list and two developers who have patches for ds1wm.c, but I didn't get any respons. Signed-off-by: David Fries <david@fries.net> Signed-off-by: Evgeniy Polyakov <johnpol@2ka.mipt.ru> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-10-16W1: w1_io.c reset comments and msleepDavid Fries
w1_reset_bus, added some comments about the timing and switched to msleep for the later delay. I don't have the hardware to test the sleep after reset change. The one wire doesn't have a timing requirement between commands so it is fine. I do have the USB hardware and it would be in big trouble with 10ms interrupt transfers to find that the reset completed. Signed-off-by: David Fries <david@fries.net> Signed-off-by: Evgeniy Polyakov <johnpol@2ka.mipt.ru> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-10-16W1: w1.c s/printk/dev_dbg/David Fries
s/printk/dev_dbg/ Signed-off-by: David Fries <david@fries.net> Signed-off-by: Evgeniy Polyakov <johnpol@2ka.mipt.ru> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-10-16W1: w1_int.c use first available master numberDavid Fries
Follow the example of other devices (like the joystick device). Pick the first available id for each detected device. Currently for USB devices, suspending and resuming would cause the number to increment. Signed-off-by: David Fries <david@fries.net> Signed-off-by: Evgeniy Polyakov <johnpol@2ka.mipt.ru> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-10-16W1: w1_therm consistent mutex access code cleanupDavid Fries
sl->master->mutex and dev->mutex refer to the same mutex variable, but be consistent and use the same set of pointers for the lock and unlock calls. It is less confusing (and one less pointer dereference this way). Signed-off-by: David Fries <david@fries.net> Signed-off-by: Evgeniy Polyakov <johnpol@2ka.mipt.ru> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-10-16W1: w1_family, remove unused variable need_exitDavid Fries
Removed the w1_family structure member variable need_exit. It was only being set and never used. Even if it were to be used it is a polling type operation. Signed-off-by: David Fries <david@fries.net> Signed-off-by: Evgeniy Polyakov <johnpol@2ka.mipt.ru> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-10-16W1: w1_therm fix user buffer overflow and catDavid Fries
Fixed data reading bug by replacing binary attribute with device one. Switching the sysfs read from bin_attribute to device_attribute. The data is far under PAGE_SIZE so the binary interface isn't required. As the device_attribute interface will make one call to w1_therm_read per file open and buffer, the result is, the following problems go away. buffer overflow: Execute a short read on w1_slave and w1_therm_read_bin would still return the full string size worth of data clobbering the user space buffer when it returned. Switching to device_attribute avoids the buffer overflow problems. With the snprintf formatted output dealing with short reads without doing a conversion per read would have been difficult. bad behavior: `cat w1_slave` would cause two temperature conversions to take place. Previously the code assumed W1_SLAVE_DATA_SIZE would be returned with each read. It would not return 0 unless the offset was less than W1_SLAVE_DATA_SIZE. The result was the first read did a temperature conversion, filled the buffer and returned, the offset in the second read would be less than W1_SLAVE_DATA_SIZE and also fill the buffer and return, the third read would finnally have a big enough offset to return 0 and cause cat to stop. Now w1_therm_read will be called at most once per open. Signed-off-by: David Fries <david@fries.net> Signed-off-by: Evgeniy Polyakov <johnpol@2ka.mipt.ru> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-10-16W1: w1_slave_read_id read bug, use device_attributeDavid Fries
Fix bug reading the id sysfs file. If less than the full 8 bytes were read, the next read would start at the first byte instead of continuing. It needed the offset added to memcpy, or the better solution was to replace it with the device attribute instead of bin attribute. Signed-off-by: David Fries <david@fries.net> Signed-off-by: Evgeniy Polyakov <johnpol@2ka.mipt.ru> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-10-16W1: new module parameter search_countDavid Fries
Added a new module parameter search_count which allows overriding the default search count. -1 continual, 0 disabled, N that many times. Signed-off-by: David Fries <david@fries.net> Signed-off-by: Evgeniy Polyakov <johnpol@2ka.mipt.ru> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-10-16W1: recode w1_slave_found logicDavid Fries
Simplified the logic in w1_slave_found by using the new w1_attach_slave_device function to find a slave and mark it as active or add the device if the crc checks. Signed-off-by: David Fries <david@fries.net> Signed-off-by: Evgeniy Polyakov <johnpol@2ka.mipt.ru> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-10-16W1: be able to manually add and remove slavesDavid Fries
sysfs entries were added to manually add and remove slave devices. This is useful if the automatic bus searching is disabled, and the device ids are already known. [akpm@linux-foundation.org: fix printk types] Signed-off-by: David Fries <david@fries.net> Signed-off-by: Evgeniy Polyakov <johnpol@2ka.mipt.ru> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-10-16W1: feature, w1_therm.c use strong pullup and documentationDavid Fries
Added strong pullup to thermal sensor driver and general documentation on the sensor. Signed-off-by: David Fries <david@fries.net> Signed-off-by: Evgeniy Polyakov <johnpol@2ka.mipt.ru> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-10-16W1: feature, enable hardware strong pullupDavid Fries
Add a strong pullup option to the w1 system. This supplies extra power for parasite powered devices. There is a w1_master_pullup sysfs entry and enable_pullup module parameter to enable or disable the strong pullup. The one wire bus requires at a minimum one wire and ground. The common wire is used for sending and receiving data as well as supplying power to devices that are parasite powered of which temperature sensors can be one example. The bus must be idle and left high while a temperature conversion is in progress, in addition the normal pullup resister on larger networks or even higher temperatures might not supply enough power. The pullup resister can't provide too much pullup current, because devices need to pull the bus down to write a value. This enables the strong pullup for supported hardware, which can supply more current when requested. Unsupported hardware will just delay with the bus high. The hardware USB 2490 one wire bus master has a bit on some commands which will enable the strong pullup as soon as the command finishes executing. To use strong pullup, call the new w1_next_pullup function to register the duration. The next write command will call set_pullup before sending the data, and reset the duration to zero once it returns. Switched from simple_strtol to strict_strtol. Signed-off-by: David Fries <david@fries.net> Cc: Evgeniy Polyakov <johnpol@2ka.mipt.ru> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-10-16W1: w1_process, block or sleepDavid Fries
The w1_process thread's sleeping and termination has been modified. msleep_interruptible was replaced by schedule_timeout and schedule to allow for kthread_stop and wake_up_process to interrupt the sleep and the unbounded sleeping when a bus search is disabled. The W1_MASTER_NEED_EXIT and flags variable were removed as they were redundant with kthread_should_stop and kthread_stop. If w1_process is sleeping, requesting a search will immediately wake it up rather than waiting for the end of msleep_interruptible previously. Signed-off-by: David Fries <david@fries.net> Signed-off-by: Evgeniy Polyakov <johnpol@2ka.mipt.ru> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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