index : litmus-rt.git	archive/unc-master-3.0 archived-2013.1 archived-private-master archived-semi-part demo ecrts-pgm-final ecrts14-pgm-final gpusync-rtss12 gpusync/staging linux-tip litmus2008-patch-series master pgm prop/litmus-signals prop/robust-tie-break staging test tracing-devel v2.6.34-with-arm-patches v2015.1 wip-2011.2-bbb wip-2011.2-bbb-trace wip-2012.3-gpu wip-2012.3-gpu-preport wip-2012.3-gpu-rtss13 wip-2012.3-gpu-sobliv-budget-w-kshark wip-aedzl-final wip-aedzl-revised wip-arbit-deadline wip-aux-tasks wip-bbb wip-bbb-prio-don wip-better-break wip-binary-heap wip-budget wip-color wip-color-jlh wip-d10-hz1000 wip-default-clustering wip-dissipation-jerickso wip-dissipation2-jerickso wip-ecrts14-pgm wip-edf-hsb wip-edf-os wip-edf-tie-break wip-edzl-critique wip-edzl-final wip-edzl-revised wip-events wip-extra-debug wip-fix-switch-jerickso wip-fix3 wip-fmlp-dequeue wip-ft-irq-flag wip-gpu-cleanup wip-gpu-interrupts wip-gpu-rtas12 wip-gpu-rtss12 wip-gpu-rtss12-srp wip-gpusync-merge wip-ikglp wip-k-fmlp wip-kernel-coloring wip-kernthreads wip-klmirqd-to-aux wip-kshark wip-litmus-3.2 wip-litmus2011.2 wip-litmus3.0-2011.2 wip-master-2.6.33-rt wip-mc wip-mc-bipasa wip-mc-jerickso wip-mc2-cache-slack wip-mcrit-mac wip-merge-3.0 wip-merge-v3.0 wip-migration-affinity wip-mmap-uncache wip-modechange wip-nested-locking wip-omlp-gedf wip-pai wip-percore-lib wip-performance wip-pgm wip-pgm-split wip-pm-ovd wip-prio-inh wip-prioq-dgl wip-refactored-gedf wip-release-master-fix wip-robust-tie-break wip-rt-kshark wip-rtas12-pgm wip-semi-part wip-semi-part-edfos-jerickso wip-shared-lib wip-shared-lib2 wip-shared-mem wip-splitting-jerickso wip-splitting-omlp-jerickso wip-stage-binheap wip-sun-port wip-timer-trace wip-tracepoints
	The LITMUS^RT kernel.	Bjoern Brandenburg

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Branch	Commit message	Author	Age
archive/unc-master-3.0	P-FP: fix BUG_ON releated to priority inheritance	Bjoern Brandenburg	13 years
archived-2013.1	uncachedev: mmap memory that is not cached by CPUs	Glenn Elliott	12 years
archived-private-master	Merge branch 'wip-2.6.34' into old-private-master	Andrea Bastoni	15 years
archived-semi-part	Merge branch 'wip-semi-part' of ssh://cvs/cvs/proj/litmus/repo/litmus2010 int...	Andrea Bastoni	15 years
demo	Further refinements	Jonathan Herman	14 years
ecrts-pgm-final	Merge branch 'wip-ecrts14-pgm' of ssh://rtsrv.cs.unc.edu/home/litmus/litmus-r...	Glenn Elliott	12 years
ecrts14-pgm-final	Merge branch 'wip-ecrts14-pgm' of ssh://rtsrv.cs.unc.edu/home/litmus/litmus-r...	Glenn Elliott	12 years
gpusync-rtss12	Final GPUSync implementation.	Glenn Elliott	12 years
gpusync/staging	Rename IKGLP R2DGLP.	Glenn Elliott	12 years
linux-tip	Merge branch 'slab/urgent' of git://git.kernel.org/pub/scm/linux/kernel/git/p...	Linus Torvalds	15 years
litmus2008-patch-series	add i386 feather-trace implementation	Bjoern B. Brandenburg	16 years
master	PSN-EDF: use inferred_sporadic_job_release_at	Bjoern Brandenburg	9 years
pgm	make it compile	Glenn Elliott	12 years
prop/litmus-signals	Infrastructure for Litmus signals.	Glenn Elliott	13 years
prop/robust-tie-break	Fixed bug in edf_higher_prio().	Glenn Elliott	13 years
staging	Fix tracepoint compilation error	Felipe Cerqueira	13 years
test	9/23/2016	Namhoon Kim	9 years
tracing-devel	Test kernel tracing events capabilities	Andrea Bastoni	16 years
v2.6.34-with-arm-patches	smsc911x: Add spinlocks around registers access	Catalin Marinas	15 years
v2015.1	Add ARM syscall def for get_current_budget	Bjoern Brandenburg	10 years
wip-2011.2-bbb	Litmus core: simplify np-section protocol	Bjoern B. Brandenburg	14 years
wip-2011.2-bbb-trace	Refactor sched_trace_log_message() -> debug_trace_log_message()	Andrea Bastoni	14 years
wip-2012.3-gpu	SOBLIV draining support for C-EDF.	Glenn Elliott	12 years
wip-2012.3-gpu-preport	pick up last C-RM file	Glenn Elliott	12 years
wip-2012.3-gpu-rtss13	Fix critical bug in GPU tracker.	Glenn Elliott	12 years
wip-2012.3-gpu-sobliv-budget-w-kshark	Proper sobliv draining and many bug fixes.	Glenn Elliott	12 years
wip-aedzl-final	Make it easier to compile AEDZL interfaces in liblitmus.	Glenn Elliott	15 years
wip-aedzl-revised	Add sched_trace data for Apative EDZL	Glenn Elliott	15 years
wip-arbit-deadline	Fix compilation bug.	Glenn Elliott	13 years
wip-aux-tasks	Description of refined aux task inheritance.	Glenn Elliott	13 years
wip-bbb	GSN-EDF & Core: improve debug TRACE'ing for NP sections	Bjoern B. Brandenburg	14 years
wip-bbb-prio-don	use correct timestamp	Bjoern B. Brandenburg	14 years
wip-better-break	Implement hash-based EDF tie-breaking.	Glenn Elliott	13 years
wip-binary-heap	Make C-EDF work with simplified binheap_delete	Glenn Elliott	13 years
wip-budget	Added support for choices in budget policy enforcement.	Glenn Elliott	15 years
wip-color	Summarize schedulability with final record	Jonathan Herman	13 years
wip-color-jlh	sched_color: Fixed two bugs causing crashing on experiment restart and a rare...	Jonathan Herman	13 years
wip-d10-hz1000	Enable HZ=1000 on District 10	Bjoern B. Brandenburg	15 years
wip-default-clustering	Feature: Make default C-EDF clustering compile-time configurable.	Glenn Elliott	15 years
wip-dissipation-jerickso	Update from 2.6.36 to 2.6.36.4	Jeremy Erickson	11 years
wip-dissipation2-jerickso	Update 2.6.36 to 2.6.36.4	Jeremy Erickson	11 years
wip-ecrts14-pgm	Merge branch 'wip-ecrts14-pgm' of ssh://rtsrv.cs.unc.edu/home/litmus/litmus-r...	Glenn Elliott	12 years
wip-edf-hsb	last tested version	Jonathan Herman	14 years
wip-edf-os	Lookup table EDF-os	Jeremy Erickson	12 years
wip-edf-tie-break	Merge branch 'wip-edf-tie-break' of ssh://rtsrv.cs.unc.edu/home/litmus/litmus...	Glenn Elliott	13 years
wip-edzl-critique	Use hr_timer's active checks instead of having own flag.	Glenn Elliott	15 years
wip-edzl-final	Implementation of the EDZL scheduler.	Glenn Elliott	15 years
wip-edzl-revised	Clean up comments.	Glenn Elliott	15 years
wip-events	Added support for tracing arbitrary actions.	Jonathan Herman	15 years
wip-extra-debug	DBG: add additional tracing	Bjoern B. Brandenburg	15 years
wip-fix-switch-jerickso	Attempt to fix race condition with plugin switching	Jeremy Erickson	15 years
wip-fix3	sched: show length of runqueue clock deactivation in /proc/sched_debug	Bjoern B. Brandenburg	15 years
wip-fmlp-dequeue	Improve FMLP queue management.	Glenn Elliott	14 years
wip-ft-irq-flag	Feather-Trace: keep track of interrupt-related interference.	Bjoern B. Brandenburg	14 years
wip-gpu-cleanup	Enable sched_trace log injection from userspace	Glenn Elliott	13 years
wip-gpu-interrupts	Remove option for threading of all softirqs.	Glenn Elliott	14 years
wip-gpu-rtas12	Generalized GPU cost predictors + EWMA. (untested)	Glenn Elliott	13 years
wip-gpu-rtss12	Final GPUSync implementation.	Glenn Elliott	13 years
wip-gpu-rtss12-srp	experimental changes to support GPUs under SRP	Glenn Elliott	13 years
wip-gpusync-merge	Cleanup priority tracking for budget enforcement.	Glenn Elliott	11 years
wip-ikglp	Move RSM and IKGLP imp. to own .c files	Glenn Elliott	13 years
wip-k-fmlp	Merge branch 'mpi-master' into wip-k-fmlp	Glenn Elliott	14 years
wip-kernel-coloring	Added recolor syscall	Namhoon Kim	7 years
wip-kernthreads	Kludge work-queue processing into klitirqd.	Glenn Elliott	15 years
wip-klmirqd-to-aux	Allow klmirqd threads to be given names.	Glenn Elliott	13 years
wip-kshark	Merge branch 'mpi-staging' into wip-kshark	Jonathan Herman	13 years
wip-litmus-3.2	Merge commit 'v3.2' into litmus-staging	Andrea Bastoni	13 years
wip-litmus2011.2	Cleanup: Coding conformance for affinity stuff.	Glenn Elliott	14 years
wip-litmus3.0-2011.2	Feather-Trace: keep track of interrupt-related interference.	Bjoern B. Brandenburg	14 years
wip-master-2.6.33-rt	Avoid deadlock when switching task policy to BACKGROUND (ugly)	Andrea Bastoni	15 years
wip-mc	Removed ARM-specific hacks which disabled less common mixed-criticality featu...	Jonathan Herman	12 years
wip-mc-bipasa	MC-EDF added	bipasa chattopadhyay	13 years
wip-mc-jerickso	Split C/D queues	Jeremy Erickson	15 years
wip-mc2-cache-slack	Manually patched mc^2 related code	Ming Yang	10 years
wip-mcrit-mac	cosmetic	Mac Mollison	15 years
wip-merge-3.0	Prevent Linux to send IPI and queue tasks on remote CPUs.	Andrea Bastoni	14 years
wip-merge-v3.0	Prevent Linux to send IPI and queue tasks on remote CPUs.	Andrea Bastoni	14 years
wip-migration-affinity	NULL affinity dereference in C-EDF.	Glenn Elliott	14 years
wip-mmap-uncache	share branch with others	Glenn Elliott	13 years
wip-modechange	RTSS 2017 submission	Namhoon Kim	8 years
wip-nested-locking	Appears to be working.	Bryan Ward	12 years
wip-omlp-gedf	First implementation of G-OMLP.	Glenn Elliott	15 years
wip-pai	Some cleanup of PAI	Glenn Elliott	14 years
wip-percore-lib	9/21/2016	Namhoon Kim	9 years
wip-performance	CONFIG_DONT_PREEMPT_ON_TIE: Don't preeempt a scheduled task on priority tie.	Glenn Elliott	14 years
wip-pgm	Add PGM support to C-FL	Glenn Elliott	12 years
wip-pgm-split	First draft of C-FL-split	Namhoon Kim	12 years
wip-pm-ovd	Add preemption-and-migration overhead tracing support	Andrea Bastoni	15 years
wip-prio-inh	P-EDF updated to use the generic pi framework.	Glenn Elliott	15 years
wip-prioq-dgl	BUG FIX: Support DGLs with PRIOQ_MUTEX	Glenn Elliott	13 years
wip-refactored-gedf	Generalizd architecture for GEDF-style scheduelrs to reduce code redundancy.	Glenn Elliott	15 years
wip-release-master-fix	bugfix: release master CPU must signal task was picked	Bjoern B. Brandenburg	14 years
wip-robust-tie-break	EDF priority tie-breaks.	Glenn Elliott	13 years
wip-rt-kshark	Move task time accounting into the complete_job method.	Jonathan Herman	13 years
wip-rtas12-pgm	Scheduling of PGM jobs.	Glenn Elliott	13 years
wip-semi-part	Fix compile error with newer GCC	Jeremy Erickson	12 years
wip-semi-part-edfos-jerickso	Use initial CPU set by client	Jeremy Erickson	12 years
wip-shared-lib	TODO: Fix condition checks in replicate_page_move_mapping()	Namhoon Kim	9 years
wip-shared-lib2	RTAS 2017 Submission ver.	Namhoon Kim	9 years
wip-shared-mem	Initial commit for shared library	Namhoon Kim	9 years
wip-splitting-jerickso	Fix release behavior	Jeremy Erickson	13 years
wip-splitting-omlp-jerickso	Bjoern's Dissertation Code with Priority Donation	Jeremy Erickson	13 years
wip-stage-binheap	An efficient binary heap implementation.	Glenn Elliott	13 years
wip-sun-port	Dynamic memory allocation and clean exit for FeatherTrace	Christopher Kenna	15 years
wip-timer-trace	bugfix: C-EDF, clear scheduled field of the correct CPU upon task_exit	Andrea Bastoni	15 years
wip-tracepoints	Add kernel-style events for sched_trace_XXX() functions	Andrea Bastoni	14 years
Tag	Download	Author	Age
2015.1	commit 8e51b37822...	Bjoern Brandenburg	10 years
2013.1	commit bcaacec1ca...	Glenn Elliott	12 years
2012.3	commit c158b5fbe4...	Jonathan Herman	13 years
2012.2	commit b53c479a0f...	Glenn Elliott	13 years
2012.1	commit 83b11ea1c6...	Bjoern B. Brandenburg	14 years
rtas12-mc-beta-exp	commit 8e236ee20f...	Christopher Kenna	14 years
2011.1	commit d11808b5c6...	Christopher Kenna	15 years
v2.6.37-rc4	commit e8a7e48bb2...	Linus Torvalds	15 years
v2.6.37-rc3	commit 3561d43fd2...	Linus Torvalds	15 years
v2.6.37-rc2	commit e53beacd23...	Linus Torvalds	15 years
v2.6.37-rc1	commit c8ddb2713c...	Linus Torvalds	15 years
v2.6.36	commit f6f94e2ab1...	Linus Torvalds	15 years
2010.2	commit 5c5456402d...	Bjoern B. Brandenburg	15 years
v2.6.36-rc8	commit cd07202cc8...	Linus Torvalds	15 years
v2.6.36-rc7	commit cb655d0f3d...	Linus Torvalds	15 years
v2.6.36-rc6	commit 899611ee7d...	Linus Torvalds	15 years
v2.6.36-rc5	commit b30a3f6257...	Linus Torvalds	15 years
v2.6.36-rc4	commit 49553c2ef8...	Linus Torvalds	15 years
v2.6.36-rc3	commit 2bfc96a127...	Linus Torvalds	15 years
v2.6.36-rc2	commit 76be97c1fc...	Linus Torvalds	15 years
v2.6.36-rc1	commit da5cabf80e...	Linus Torvalds	15 years
v2.6.35	commit 9fe6206f40...	Linus Torvalds	15 years
v2.6.35-rc6	commit b37fa16e78...	Linus Torvalds	15 years
v2.6.35-rc5	commit 1c5474a65b...	Linus Torvalds	15 years
v2.6.35-rc4	commit 815c4163b6...	Linus Torvalds	15 years
v2.6.35-rc3	commit 7e27d6e778...	Linus Torvalds	15 years
v2.6.35-rc2	commit e44a21b726...	Linus Torvalds	15 years
v2.6.35-rc1	commit 67a3e12b05...	Linus Torvalds	15 years
2010.1	commit 7c1ff4c544...	Andrea Bastoni	15 years
v2.6.34	commit e40152ee1e...	Linus Torvalds	15 years
v2.6.33.4	commit 4640b4e7d9...	Greg Kroah-Hartman	15 years
v2.6.34-rc7	commit b57f95a382...	Linus Torvalds	15 years
v2.6.34-rc6	commit 66f41d4c5c...	Linus Torvalds	15 years
v2.6.33.3	commit 3e7ad8ed97...	Greg Kroah-Hartman	15 years
v2.6.34-rc5	commit 01bf0b6457...	Linus Torvalds	15 years
v2.6.34-rc4	commit 0d0fb0f9c5...	Linus Torvalds	15 years
v2.6.33.2	commit 19f00f070c...	Greg Kroah-Hartman	15 years
v2.6.34-rc3	commit 2eaa9cfdf3...	Linus Torvalds	15 years
v2.6.34-rc2	commit 220bf991b0...	Linus Torvalds	15 years
v2.6.33.1	commit dbdafe5ccf...	Greg Kroah-Hartman	15 years
v2.6.34-rc1	commit 57d54889cd...	Linus Torvalds	16 years
v2.6.33	commit 60b341b778...	Linus Torvalds	16 years
v2.6.33-rc8	commit 724e6d3fe8...	Linus Torvalds	16 years
v2.6.33-rc7	commit 29275254ca...	Linus Torvalds	16 years
v2.6.33-rc6	commit abe94c756c...	Linus Torvalds	16 years
v2.6.33-rc5	commit 92dcffb916...	Linus Torvalds	16 years
v2.6.33-rc4	commit 7284ce6c9f...	Linus Torvalds	16 years
v2.6.33-rc3	commit 74d2e4f8d7...	Linus Torvalds	16 years
v2.6.33-rc2	commit 6b7b284958...	Linus Torvalds	16 years
v2.6.33-rc1	commit 55639353a0...	Linus Torvalds	16 years
v2.6.32	commit 22763c5cf3...	Linus Torvalds	16 years
v2.6.32-rc8	commit 648f4e3e50...	Linus Torvalds	16 years
v2.6.32-rc7	commit 156171c71a...	Linus Torvalds	16 years
v2.6.32-rc6	commit b419148e56...	Linus Torvalds	16 years
v2.6.32-rc5	commit 012abeea66...	Linus Torvalds	16 years
v2.6.32-rc4	commit 161291396e...	Linus Torvalds	16 years
v2.6.32-rc3	commit 374576a8b6...	Linus Torvalds	16 years
v2.6.32-rc1	commit 17d857be64...	Linus Torvalds	16 years
v2.6.32-rc2	commit 17d857be64...	Linus Torvalds	16 years
v2.6.31	commit 74fca6a428...	Linus Torvalds	16 years
v2.6.31-rc9	commit e07cccf404...	Linus Torvalds	16 years
v2.6.31-rc8	commit 326ba5010a...	Linus Torvalds	16 years
v2.6.31-rc7	commit 422bef879e...	Linus Torvalds	16 years
v2.6.31-rc6	commit 64f1607ffb...	Linus Torvalds	16 years
v2.6.31-rc5	commit ed680c4ad4...	Linus Torvalds	16 years
v2.6.31-rc4	commit 4be3bd7849...	Linus Torvalds	16 years
v2.6.31-rc3	commit 6847e154e3...	Linus Torvalds	16 years
v2.6.31-rc2	commit 8e4a718ff3...	Linus Torvalds	16 years
v2.6.31-rc1	commit 28d0325ce6...	Linus Torvalds	16 years
v2.6.30	commit 07a2039b8e...	Linus Torvalds	16 years
v2.6.30-rc8	commit 9fa7eb283c...	Linus Torvalds	16 years
v2.6.30-rc7	commit 59a3759d0f...	Linus Torvalds	16 years
v2.6.30-rc6	commit 1406de8e11...	Linus Torvalds	16 years
v2.6.30-rc5	commit 091bf7624d...	Linus Torvalds	16 years
v2.6.30-rc4	commit 091438dd56...	Linus Torvalds	16 years
v2.6.30-rc3	commit 0910697403...	Linus Torvalds	16 years
v2.6.30-rc2	commit 0882e8dd3a...	Linus Torvalds	16 years
v2.6.30-rc1	commit 577c9c456f...	Linus Torvalds	16 years
v2.6.29	commit 8e0ee43bc2...	Linus Torvalds	16 years
v2.6.29-rc8	commit 041b62374c...	Linus Torvalds	17 years
v2.6.29-rc7	commit fec6c6fec3...	Linus Torvalds	17 years
v2.6.29-rc6	commit 20f4d6c3a2...	Linus Torvalds	17 years
v2.6.29-rc5	commit d2f8d7ee1a...	Linus Torvalds	17 years
v2.6.29-rc4	commit 8e4921515c...	Linus Torvalds	17 years
v2.6.29-rc3	commit 18e352e4a7...	Linus Torvalds	17 years
v2.6.29-rc2	commit 1de9e8e70f...	Linus Torvalds	17 years
v2.6.29-rc1	commit c59765042f...	Linus Torvalds	17 years
v2.6.28	commit 4a6908a3a0...	Linus Torvalds	17 years
v2.6.28-rc9	commit 929096fe9f...	Linus Torvalds	17 years
v2.6.28-rc8	commit 8b1fae4e42...	Linus Torvalds	17 years
v2.6.28-rc7	commit 061e41fdb5...	Linus Torvalds	17 years
v2.6.28-rc6	commit 13d428afc0...	Linus Torvalds	17 years
v2.6.28-rc5	commit 9bf1a2445f...	Linus Torvalds	17 years
v2.6.28-rc4	commit f7160c7573...	Linus Torvalds	17 years
v2.6.28-rc3	commit 45beca08dd...	Linus Torvalds	17 years
v2.6.28-rc2	commit 0173a3265b...	Linus Torvalds	17 years
v2.6.28-rc1	commit 57f8f7b60d...	Linus Torvalds	17 years
v2.6.27	commit 3fa8749e58...	Linus Torvalds	17 years
v2.6.27-rc9	commit 4330ed8ed4...	Linus Torvalds	17 years
v2.6.27-rc8	commit 94aca1dac6...	Linus Torvalds	17 years
v2.6.27-rc7	commit 72d31053f6...	Linus Torvalds	17 years
v2.6.27-rc6	commit adee14b2e1...	Linus Torvalds	17 years
v2.6.27-rc5	commit 24342c34a0...	Linus Torvalds	17 years
v2.6.27-rc4	commit 6a55617ed5...	Linus Torvalds	17 years
v2.6.27-rc3	commit 30a2f3c60a...	Linus Torvalds	17 years
v2.6.27-rc2	commit 0967d61ea0...	Linus Torvalds	17 years
v2.6.27-rc1	commit 6e86841d05...	Linus Torvalds	17 years
v2.6.26	commit bce7f793da...	Linus Torvalds	17 years
v2.6.26-rc9	commit b7279469d6...	Linus Torvalds	17 years
v2.6.26-rc8	commit 543cf4cb3f...	Linus Torvalds	17 years
v2.6.26-rc7	commit d70ac829b7...	Linus Torvalds	17 years
v2.6.26-rc6	commit 5dd34572ad...	Linus Torvalds	17 years
v2.6.26-rc5	commit 53c8ba9540...	Linus Torvalds	17 years
v2.6.26-rc4	commit e490517a03...	Linus Torvalds	17 years
v2.6.26-rc3	commit b8291ad07a...	Linus Torvalds	17 years
v2.6.26-rc2	commit 492c2e476e...	Linus Torvalds	17 years
v2.6.26-rc1	commit 2ddcca36c8...	Linus Torvalds	17 years
v2.6.25	commit 4b119e21d0...	Linus Torvalds	17 years
v2.6.25-rc9	commit 120dd64cac...	Linus Torvalds	17 years
v2.6.25-rc8	commit 0e81a8ae37...	Linus Torvalds	17 years
v2.6.25-rc7	commit 05dda977f2...	Linus Torvalds	17 years
v2.6.25-rc6	commit a978b30af3...	Linus Torvalds	17 years
v2.6.25-rc5	commit cdeeeae056...	Linus Torvalds	18 years
v2.6.25-rc4	commit 29e8c3c304...	Linus Torvalds	18 years
v2.6.25-rc3	commit bfa274e243...	Linus Torvalds	18 years
v2.6.25-rc2	commit 101142c37b...	Linus Torvalds	18 years
v2.6.25-rc1	commit 19af35546d...	Linus Torvalds	18 years
v2.6.24	commit 49914084e7...	Linus Torvalds	18 years
v2.6.24-rc8	commit cbd9c88369...	Linus Torvalds	18 years
v2.6.24-rc7	commit 3ce5445046...	Linus Torvalds	18 years
v2.6.24-rc6	commit ea67db4cdb...	Linus Torvalds	18 years
v2.6.24-rc5	commit 82d29bf6dc...	Linus Torvalds	18 years
v2.6.24-rc4	commit 09b56adc98...	Linus Torvalds	18 years
v2.6.24-rc3	commit d9f8bcbf67...	Linus Torvalds	18 years
v2.6.24-rc2	commit dbeeb816e8...	Linus Torvalds	18 years
v2.6.24-rc1	commit c9927c2bf4...	Linus Torvalds	18 years
v2.6.23	commit bbf25010f1...	Linus Torvalds	18 years
v2.6.23-rc9	commit 3146b39c18...	Linus Torvalds	18 years
v2.6.23-rc8	commit 4942de4a0e...	Linus Torvalds	18 years
v2.6.23-rc7	commit 81cfe79b9c...	Linus Torvalds	18 years
v2.6.23-rc6	commit 0d4cbb5e7f...	Linus Torvalds	18 years
v2.6.23-rc5	commit 40ffbfad6b...	Linus Torvalds	18 years
v2.6.23-rc4	commit b07d68b5ca...	Linus Torvalds	18 years
v2.6.23-rc3	commit 39d3520c92...	Linus Torvalds	18 years
v2.6.23-rc2	commit d4ac2477fa...	Linus Torvalds	18 years
v2.6.23-rc1	commit f695baf2df...	Linus Torvalds	18 years
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generated by cgit v1.2.2 (git 2.25.0) at 2025-09-08 02:34:51 -0400

/*
 *  thinkpad_acpi.c - ThinkPad ACPI Extras
 *
 *
 *  Copyright (C) 2004-2005 Borislav Deianov <borislav@users.sf.net>
 *  Copyright (C) 2006-2007 Henrique de Moraes Holschuh <hmh@hmh.eng.br>
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program; if not, write to the Free Software
 *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
 *  02110-1301, USA.
 */

#define IBM_VERSION "0.17"
#define TPACPI_SYSFS_VERSION 0x020000

/*
 *  Changelog:
 *  2007-03-27  0.14	renamed to thinkpad_acpi and moved to
 *  			drivers/misc.
 *
 *  2006-11-22	0.13	new maintainer
 *  			changelog now lives in git commit history, and will
 *  			not be updated further in-file.
 *
 *  2005-08-17  0.12	fix compilation on 2.6.13-rc kernels
 *  2005-03-17	0.11	support for 600e, 770x
 *			    thanks to Jamie Lentin <lentinj@dial.pipex.com>
 *			support for 770e, G41
 *			G40 and G41 don't have a thinklight
 *			temperatures no longer experimental
 *			experimental brightness control
 *			experimental volume control
 *			experimental fan enable/disable
 *  2005-01-16	0.10	fix module loading on R30, R31
 *  2005-01-16	0.9	support for 570, R30, R31
 *			ultrabay support on A22p, A3x
 *			limit arg for cmos, led, beep, drop experimental status
 *			more capable led control on A21e, A22p, T20-22, X20
 *			experimental temperatures and fan speed
 *			experimental embedded controller register dump
 *			mark more functions as __init, drop incorrect __exit
 *			use MODULE_VERSION
 *			    thanks to Henrik Brix Andersen <brix@gentoo.org>
 *			fix parameter passing on module loading
 *			    thanks to Rusty Russell <rusty@rustcorp.com.au>
 *			    thanks to Jim Radford <radford@blackbean.org>
 *  2004-11-08	0.8	fix init error case, don't return from a macro
 *			    thanks to Chris Wright <chrisw@osdl.org>
 *  2004-10-23	0.7	fix module loading on A21e, A22p, T20, T21, X20
 *			fix led control on A21e
 *  2004-10-19	0.6	use acpi_bus_register_driver() to claim HKEY device
 *  2004-10-18	0.5	thinklight support on A21e, G40, R32, T20, T21, X20
 *			proc file format changed
 *			video_switch command
 *			experimental cmos control
 *			experimental led control
 *			experimental acpi sounds
 *  2004-09-16	0.4	support for module parameters
 *			hotkey mask can be prefixed by 0x
 *			video output switching
 *			video expansion control
 *			ultrabay eject support
 *			removed lcd brightness/on/off control, didn't work
 *  2004-08-17	0.3	support for R40
 *			lcd off, brightness control
 *			thinklight on/off
 *  2004-08-14	0.2	support for T series, X20
 *			bluetooth enable/disable
 *			hotkey events disabled by default
 *			removed fan control, currently useless
 *  2004-08-09	0.1	initial release, support for X series
 */

#include "thinkpad_acpi.h"

MODULE_AUTHOR("Borislav Deianov, Henrique de Moraes Holschuh");
MODULE_DESCRIPTION(IBM_DESC);
MODULE_VERSION(IBM_VERSION);
MODULE_LICENSE("GPL");

/* Please remove this in year 2009 */
MODULE_ALIAS("ibm_acpi");

/*
 * DMI matching for module autoloading
 *
 * See http://thinkwiki.org/wiki/List_of_DMI_IDs
 * See http://thinkwiki.org/wiki/BIOS_Upgrade_Downloads
 *
 * Only models listed in thinkwiki will be supported, so add yours
 * if it is not there yet.
 */
#define IBM_BIOS_MODULE_ALIAS(__type) \
	MODULE_ALIAS("dmi:bvnIBM:bvr" __type "ET??WW")

/* Non-ancient thinkpads */
MODULE_ALIAS("dmi:bvnIBM:*:svnIBM:*:pvrThinkPad*:rvnIBM:*");
MODULE_ALIAS("dmi:bvnLENOVO:*:svnLENOVO:*:pvrThinkPad*:rvnLENOVO:*");

/* Ancient thinkpad BIOSes have to be identified by
 * BIOS type or model number, and there are far less
 * BIOS types than model numbers... */
IBM_BIOS_MODULE_ALIAS("I[B,D,H,I,M,N,O,T,W,V,Y,Z]");
IBM_BIOS_MODULE_ALIAS("1[0,3,6,8,A-G,I,K,M-P,S,T]");
IBM_BIOS_MODULE_ALIAS("K[U,X-Z]");

#define __unused __attribute__ ((unused))

static enum {
	TPACPI_LIFE_INIT = 0,
	TPACPI_LIFE_RUNNING,
	TPACPI_LIFE_EXITING,
} tpacpi_lifecycle;

/****************************************************************************
 ****************************************************************************
 *
 * ACPI Helpers and device model
 *
 ****************************************************************************
 ****************************************************************************/

/*************************************************************************
 * ACPI basic handles
 */

static acpi_handle root_handle;

#define IBM_HANDLE(object, parent, paths...)			\
	static acpi_handle  object##_handle;			\
	static acpi_handle *object##_parent = &parent##_handle;	\
	static char        *object##_path;			\
	static char        *object##_paths[] = { paths }

IBM_HANDLE(ec, root, "\\_SB.PCI0.ISA.EC0",	/* 240, 240x */
	   "\\_SB.PCI.ISA.EC",	/* 570 */
	   "\\_SB.PCI0.ISA0.EC0",	/* 600e/x, 770e, 770x */
	   "\\_SB.PCI0.ISA.EC",	/* A21e, A2xm/p, T20-22, X20-21 */
	   "\\_SB.PCI0.AD4S.EC0",	/* i1400, R30 */
	   "\\_SB.PCI0.ICH3.EC0",	/* R31 */
	   "\\_SB.PCI0.LPC.EC",	/* all others */
	   );

IBM_HANDLE(ecrd, ec, "ECRD");	/* 570 */
IBM_HANDLE(ecwr, ec, "ECWR");	/* 570 */


/*************************************************************************
 * Misc ACPI handles
 */

IBM_HANDLE(cmos, root, "\\UCMS",	/* R50, R50e, R50p, R51, T4x, X31, X40 */
	   "\\CMOS",		/* A3x, G4x, R32, T23, T30, X22-24, X30 */
	   "\\CMS",		/* R40, R40e */
	   );			/* all others */

IBM_HANDLE(hkey, ec, "\\_SB.HKEY",	/* 600e/x, 770e, 770x */
	   "^HKEY",		/* R30, R31 */
	   "HKEY",		/* all others */
	   );			/* 570 */


/*************************************************************************
 * ACPI helpers
 */

static int acpi_evalf(acpi_handle handle,
		      void *res, char *method, char *fmt, ...)
{
	char *fmt0 = fmt;
	struct acpi_object_list params;
	union acpi_object in_objs[IBM_MAX_ACPI_ARGS];
	struct acpi_buffer result, *resultp;
	union acpi_object out_obj;
	acpi_status status;
	va_list ap;
	char res_type;
	int success;
	int quiet;

	if (!*fmt) {
		printk(IBM_ERR "acpi_evalf() called with empty format\n");
		return 0;
	}

	if (*fmt == 'q') {
		quiet = 1;
		fmt++;
	} else
		quiet = 0;

	res_type = *(fmt++);

	params.count = 0;
	params.pointer = &in_objs[0];

	va_start(ap, fmt);
	while (*fmt) {
		char c = *(fmt++);
		switch (c) {
		case 'd':	/* int */
			in_objs[params.count].integer.value = va_arg(ap, int);
			in_objs[params.count++].type = ACPI_TYPE_INTEGER;
			break;
			/* add more types as needed */
		default:
			printk(IBM_ERR "acpi_evalf() called "
			       "with invalid format character '%c'\n", c);
			return 0;
		}
	}
	va_end(ap);

	if (res_type != 'v') {
		result.length = sizeof(out_obj);
		result.pointer = &out_obj;
		resultp = &result;
	} else
		resultp = NULL;

	status = acpi_evaluate_object(handle, method, &params, resultp);

	switch (res_type) {
	case 'd':		/* int */
		if (res)
			*(int *)res = out_obj.integer.value;
		success = status == AE_OK && out_obj.type == ACPI_TYPE_INTEGER;
		break;
	case 'v':		/* void */
		success = status == AE_OK;
		break;
		/* add more types as needed */
	default:
		printk(IBM_ERR "acpi_evalf() called "
		       "with invalid format character '%c'\n", res_type);
		return 0;
	}

	if (!success && !quiet)
		printk(IBM_ERR "acpi_evalf(%s, %s, ...) failed: %d\n",
		       method, fmt0, status);

	return success;
}

static void __unused acpi_print_int(acpi_handle handle, char *method)
{
	int i;

	if (acpi_evalf(handle, &i, method, "d"))
		printk(IBM_INFO "%s = 0x%x\n", method, i);
	else
		printk(IBM_ERR "error calling %s\n", method);
}

static int acpi_ec_read(int i, u8 * p)
{
	int v;

	if (ecrd_handle) {
		if (!acpi_evalf(ecrd_handle, &v, NULL, "dd", i))
			return 0;
		*p = v;
	} else {
		if (ec_read(i, p) < 0)
			return 0;
	}

	return 1;
}

static int acpi_ec_write(int i, u8 v)
{
	if (ecwr_handle) {
		if (!acpi_evalf(ecwr_handle, NULL, NULL, "vdd", i, v))
			return 0;
	} else {
		if (ec_write(i, v) < 0)
			return 0;
	}

	return 1;
}

static int _sta(acpi_handle handle)
{
	int status;

	if (!handle || !acpi_evalf(handle, &status, "_STA", "d"))
		status = 0;

	return status;
}

static int issue_thinkpad_cmos_command(int cmos_cmd)
{
	if (!cmos_handle)
		return -ENXIO;

	if (!acpi_evalf(cmos_handle, NULL, NULL, "vd", cmos_cmd))
		return -EIO;

	return 0;
}

/*************************************************************************
 * ACPI device model
 */

static void drv_acpi_handle_init(char *name,
			   acpi_handle *handle, acpi_handle parent,
			   char **paths, int num_paths, char **path)
{
	int i;
	acpi_status status;

	vdbg_printk(TPACPI_DBG_INIT, "trying to locate ACPI handle for %s\n",
		name);

	for (i = 0; i < num_paths; i++) {
		status = acpi_get_handle(parent, paths[i], handle);
		if (ACPI_SUCCESS(status)) {
			*path = paths[i];
			dbg_printk(TPACPI_DBG_INIT,
				   "Found ACPI handle %s for %s\n",
				   *path, name);
			return;
		}
	}

	vdbg_printk(TPACPI_DBG_INIT, "ACPI handle for %s not found\n",
		    name);
	*handle = NULL;
}

static void dispatch_acpi_notify(acpi_handle handle, u32 event, void *data)
{
	struct ibm_struct *ibm = data;

	if (tpacpi_lifecycle != TPACPI_LIFE_RUNNING)
		return;

	if (!ibm || !ibm->acpi || !ibm->acpi->notify)
		return;

	ibm->acpi->notify(ibm, event);
}

static int __init setup_acpi_notify(struct ibm_struct *ibm)
{
	acpi_status status;
	int rc;

	BUG_ON(!ibm->acpi);

	if (!*ibm->acpi->handle)
		return 0;

	vdbg_printk(TPACPI_DBG_INIT,
		"setting up ACPI notify for %s\n", ibm->name);

	rc = acpi_bus_get_device(*ibm->acpi->handle, &ibm->acpi->device);
	if (rc < 0) {
		printk(IBM_ERR "acpi_bus_get_device(%s) failed: %d\n",
			ibm->name, rc);
		return -ENODEV;
	}

	acpi_driver_data(ibm->acpi->device) = ibm;
	sprintf(acpi_device_class(ibm->acpi->device), "%s/%s",
		IBM_ACPI_EVENT_PREFIX,
		ibm->name);

	status = acpi_install_notify_handler(*ibm->acpi->handle,
			ibm->acpi->type, dispatch_acpi_notify, ibm);
	if (ACPI_FAILURE(status)) {
		if (status == AE_ALREADY_EXISTS) {
			printk(IBM_NOTICE "another device driver is already handling %s events\n",
				ibm->name);
		} else {
			printk(IBM_ERR "acpi_install_notify_handler(%s) failed: %d\n",
				ibm->name, status);
		}
		return -ENODEV;
	}
	ibm->flags.acpi_notify_installed = 1;
	return 0;
}

static int __init tpacpi_device_add(struct acpi_device *device)
{
	return 0;
}

static int __init register_tpacpi_subdriver(struct ibm_struct *ibm)
{
	int rc;

	dbg_printk(TPACPI_DBG_INIT,
		"registering %s as an ACPI driver\n", ibm->name);

	BUG_ON(!ibm->acpi);

	ibm->acpi->driver = kzalloc(sizeof(struct acpi_driver), GFP_KERNEL);
	if (!ibm->acpi->driver) {
		printk(IBM_ERR "kzalloc(ibm->driver) failed\n");
		return -ENOMEM;
	}

	sprintf(ibm->acpi->driver->name, "%s_%s", IBM_NAME, ibm->name);
	ibm->acpi->driver->ids = ibm->acpi->hid;

	ibm->acpi->driver->ops.add = &tpacpi_device_add;

	rc = acpi_bus_register_driver(ibm->acpi->driver);
	if (rc < 0) {
		printk(IBM_ERR "acpi_bus_register_driver(%s) failed: %d\n",
		       ibm->name, rc);
		kfree(ibm->acpi->driver);
		ibm->acpi->driver = NULL;
	} else if (!rc)
		ibm->flags.acpi_driver_registered = 1;

	return rc;
}


/****************************************************************************
 ****************************************************************************
 *
 * Procfs Helpers
 *
 ****************************************************************************
 ****************************************************************************/

static int dispatch_procfs_read(char *page, char **start, off_t off,
			int count, int *eof, void *data)
{
	struct ibm_struct *ibm = data;
	int len;

	if (!ibm || !ibm->read)
		return -EINVAL;

	len = ibm->read(page);
	if (len < 0)
		return len;

	if (len <= off + count)
		*eof = 1;
	*start = page + off;
	len -= off;
	if (len > count)
		len = count;
	if (len < 0)
		len = 0;

	return len;
}

static int dispatch_procfs_write(struct file *file,
			const char __user * userbuf,
			unsigned long count, void *data)
{
	struct ibm_struct *ibm = data;
	char *kernbuf;
	int ret;

	if (!ibm || !ibm->write)
		return -EINVAL;

	kernbuf = kmalloc(count + 2, GFP_KERNEL);
	if (!kernbuf)
		return -ENOMEM;

	if (copy_from_user(kernbuf, userbuf, count)) {
		kfree(kernbuf);
		return -EFAULT;
	}

	kernbuf[count] = 0;
	strcat(kernbuf, ",");
	ret = ibm->write(kernbuf);
	if (ret == 0)
		ret = count;

	kfree(kernbuf);

	return ret;
}

static char *next_cmd(char **cmds)
{
	char *start = *cmds;
	char *end;

	while ((end = strchr(start, ',')) && end == start)
		start = end + 1;

	if (!end)
		return NULL;

	*end = 0;
	*cmds = end + 1;
	return start;
}


/****************************************************************************
 ****************************************************************************
 *
 * Device model: input, hwmon and platform
 *
 ****************************************************************************
 ****************************************************************************/

static struct platform_device *tpacpi_pdev;
static struct platform_device *tpacpi_sensors_pdev;
static struct device *tpacpi_hwmon;
static struct input_dev *tpacpi_inputdev;
static struct mutex tpacpi_inputdev_send_mutex;


static int tpacpi_resume_handler(struct platform_device *pdev)
{
	struct ibm_struct *ibm, *itmp;

	list_for_each_entry_safe(ibm, itmp,
				 &tpacpi_all_drivers,
				 all_drivers) {
		if (ibm->resume)
			(ibm->resume)();
	}

	return 0;
}

static struct platform_driver tpacpi_pdriver = {
	.driver = {
		.name = IBM_DRVR_NAME,
		.owner = THIS_MODULE,
	},
	.resume = tpacpi_resume_handler,
};

static struct platform_driver tpacpi_hwmon_pdriver = {
	.driver = {
		.name = IBM_HWMON_DRVR_NAME,
		.owner = THIS_MODULE,
	},
};

/*************************************************************************
 * thinkpad-acpi driver attributes
 */

/* interface_version --------------------------------------------------- */
static ssize_t tpacpi_driver_interface_version_show(
				struct device_driver *drv,
				char *buf)
{
	return snprintf(buf, PAGE_SIZE, "0x%08x\n", TPACPI_SYSFS_VERSION);
}

static DRIVER_ATTR(interface_version, S_IRUGO,
		tpacpi_driver_interface_version_show, NULL);

/* debug_level --------------------------------------------------------- */
static ssize_t tpacpi_driver_debug_show(struct device_driver *drv,
						char *buf)
{
	return snprintf(buf, PAGE_SIZE, "0x%04x\n", dbg_level);
}

static ssize_t tpacpi_driver_debug_store(struct device_driver *drv,
						const char *buf, size_t count)
{
	unsigned long t;

	if (parse_strtoul(buf, 0xffff, &t))
		return -EINVAL;

	dbg_level = t;

	return count;
}

static DRIVER_ATTR(debug_level, S_IWUSR | S_IRUGO,
		tpacpi_driver_debug_show, tpacpi_driver_debug_store);

/* version ------------------------------------------------------------- */
static ssize_t tpacpi_driver_version_show(struct device_driver *drv,
						char *buf)
{
	return snprintf(buf, PAGE_SIZE, "%s v%s\n", IBM_DESC, IBM_VERSION);
}

static DRIVER_ATTR(version, S_IRUGO,
		tpacpi_driver_version_show, NULL);

/* --------------------------------------------------------------------- */

static struct driver_attribute* tpacpi_driver_attributes[] = {
	&driver_attr_debug_level, &driver_attr_version,
	&driver_attr_interface_version,
};

static int __init tpacpi_create_driver_attributes(struct device_driver *drv)
{
	int i, res;

	i = 0;
	res = 0;
	while (!res && i < ARRAY_SIZE(tpacpi_driver_attributes)) {
		res = driver_create_file(drv, tpacpi_driver_attributes[i]);
		i++;
	}

	return res;
}

static void tpacpi_remove_driver_attributes(struct device_driver *drv)
{
	int i;

	for(i = 0; i < ARRAY_SIZE(tpacpi_driver_attributes); i++)
		driver_remove_file(drv, tpacpi_driver_attributes[i]);
}

/*************************************************************************
 * sysfs support helpers
 */

struct attribute_set_obj {
	struct attribute_set s;
	struct attribute *a;
} __attribute__((packed));

static struct attribute_set *create_attr_set(unsigned int max_members,
						const char* name)
{
	struct attribute_set_obj *sobj;

	if (max_members == 0)
		return NULL;

	/* Allocates space for implicit NULL at the end too */
	sobj = kzalloc(sizeof(struct attribute_set_obj) +
		    max_members * sizeof(struct attribute *),
		    GFP_KERNEL);
	if (!sobj)
		return NULL;
	sobj->s.max_members = max_members;
	sobj->s.group.attrs = &sobj->a;
	sobj->s.group.name = name;

	return &sobj->s;
}

/* not multi-threaded safe, use it in a single thread per set */
static int add_to_attr_set(struct attribute_set* s, struct attribute *attr)
{
	if (!s || !attr)
		return -EINVAL;

	if (s->members >= s->max_members)
		return -ENOMEM;

	s->group.attrs[s->members] = attr;
	s->members++;

	return 0;
}

static int add_many_to_attr_set(struct attribute_set* s,
			struct attribute **attr,
			unsigned int count)
{
	int i, res;

	for (i = 0; i < count; i++) {
		res = add_to_attr_set(s, attr[i]);
		if (res)
			return res;
	}

	return 0;
}

static void delete_attr_set(struct attribute_set* s, struct kobject *kobj)
{
	sysfs_remove_group(kobj, &s->group);
	destroy_attr_set(s);
}

static int parse_strtoul(const char *buf,
		unsigned long max, unsigned long *value)
{
	char *endp;

	while (*buf && isspace(*buf))
		buf++;
	*value = simple_strtoul(buf, &endp, 0);
	while (*endp && isspace(*endp))
		endp++;
	if (*endp || *value > max)
		return -EINVAL;

	return 0;
}

/****************************************************************************
 ****************************************************************************
 *
 * Subdrivers
 *
 ****************************************************************************
 ****************************************************************************/

/*************************************************************************
 * thinkpad-acpi init subdriver
 */

static int __init thinkpad_acpi_driver_init(struct ibm_init_struct *iibm)
{
	printk(IBM_INFO "%s v%s\n", IBM_DESC, IBM_VERSION);
	printk(IBM_INFO "%s\n", IBM_URL);

	printk(IBM_INFO "ThinkPad BIOS %s, EC %s\n",
		(thinkpad_id.bios_version_str) ?
			thinkpad_id.bios_version_str : "unknown",
		(thinkpad_id.ec_version_str) ?
			thinkpad_id.ec_version_str : "unknown");

	if (thinkpad_id.vendor && thinkpad_id.model_str)
		printk(IBM_INFO "%s %s\n",
			(thinkpad_id.vendor == PCI_VENDOR_ID_IBM) ?
				"IBM" : ((thinkpad_id.vendor ==
						PCI_VENDOR_ID_LENOVO) ?
					"Lenovo" : "Unknown vendor"),
			thinkpad_id.model_str);

	return 0;
}

static int thinkpad_acpi_driver_read(char *p)
{
	int len = 0;

	len += sprintf(p + len, "driver:\t\t%s\n", IBM_DESC);
	len += sprintf(p + len, "version:\t%s\n", IBM_VERSION);

	return len;
}

static struct ibm_struct thinkpad_acpi_driver_data = {
	.name = "driver",
	.read = thinkpad_acpi_driver_read,
};

/*************************************************************************
 * Hotkey subdriver
 */

static int hotkey_orig_status;
static u32 hotkey_orig_mask;
static u32 hotkey_all_mask;
static u32 hotkey_reserved_mask;

static u16 *hotkey_keycode_map;

static struct attribute_set *hotkey_dev_attributes;

static int hotkey_get_wlsw(int *status)
{
	if (!acpi_evalf(hkey_handle, status, "WLSW", "d"))
		return -EIO;
	return 0;
}

/* sysfs hotkey enable ------------------------------------------------- */
static ssize_t hotkey_enable_show(struct device *dev,
			   struct device_attribute *attr,
			   char *buf)
{
	int res, status;
	u32 mask;

	res = hotkey_get(&status, &mask);
	if (res)
		return res;

	return snprintf(buf, PAGE_SIZE, "%d\n", status);
}

static ssize_t hotkey_enable_store(struct device *dev,
			    struct device_attribute *attr,
			    const char *buf, size_t count)
{
	unsigned long t;
	int res, status;
	u32 mask;

	if (parse_strtoul(buf, 1, &t))
		return -EINVAL;

	res = hotkey_get(&status, &mask);
	if (!res)
		res = hotkey_set(t, mask);

	return (res) ? res : count;
}

static struct device_attribute dev_attr_hotkey_enable =
	__ATTR(hotkey_enable, S_IWUSR | S_IRUGO,
		hotkey_enable_show, hotkey_enable_store);

/* sysfs hotkey mask --------------------------------------------------- */
static ssize_t hotkey_mask_show(struct device *dev,
			   struct device_attribute *attr,
			   char *buf)
{
	int res, status;
	u32 mask;

	res = hotkey_get(&status, &mask);
	if (res)
		return res;

	return snprintf(buf, PAGE_SIZE, "0x%08x\n", mask);
}

static ssize_t hotkey_mask_store(struct device *dev,
			    struct device_attribute *attr,
			    const char *buf, size_t count)
{
	unsigned long t;
	int res, status;
	u32 mask;

	if (parse_strtoul(buf, 0xffffffffUL, &t))
		return -EINVAL;

	res = hotkey_get(&status, &mask);
	if (!res)
		hotkey_set(status, t);

	return (res) ? res : count;
}

static struct device_attribute dev_attr_hotkey_mask =
	__ATTR(hotkey_mask, S_IWUSR | S_IRUGO,
		hotkey_mask_show, hotkey_mask_store);

/* sysfs hotkey bios_enabled ------------------------------------------- */
static ssize_t hotkey_bios_enabled_show(struct device *dev,
			   struct device_attribute *attr,
			   char *buf)
{
	return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_orig_status);
}

static struct device_attribute dev_attr_hotkey_bios_enabled =
	__ATTR(hotkey_bios_enabled, S_IRUGO, hotkey_bios_enabled_show, NULL);

/* sysfs hotkey bios_mask ---------------------------------------------- */
static ssize_t hotkey_bios_mask_show(struct device *dev,
			   struct device_attribute *attr,
			   char *buf)
{
	return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_orig_mask);
}

static struct device_attribute dev_attr_hotkey_bios_mask =
	__ATTR(hotkey_bios_mask, S_IRUGO, hotkey_bios_mask_show, NULL);

/* sysfs hotkey all_mask ----------------------------------------------- */
static ssize_t hotkey_all_mask_show(struct device *dev,
			   struct device_attribute *attr,
			   char *buf)
{
	return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_all_mask);
}

static struct device_attribute dev_attr_hotkey_all_mask =
	__ATTR(hotkey_all_mask, S_IRUGO, hotkey_all_mask_show, NULL);

/* sysfs hotkey recommended_mask --------------------------------------- */
static ssize_t hotkey_recommended_mask_show(struct device *dev,
					    struct device_attribute *attr,
					    char *buf)
{
	return snprintf(buf, PAGE_SIZE, "0x%08x\n",
			hotkey_all_mask & ~hotkey_reserved_mask);
}

static struct device_attribute dev_attr_hotkey_recommended_mask =
	__ATTR(hotkey_recommended_mask, S_IRUGO,
		hotkey_recommended_mask_show, NULL);

/* sysfs hotkey radio_sw ----------------------------------------------- */
static ssize_t hotkey_radio_sw_show(struct device *dev,
			   struct device_attribute *attr,
			   char *buf)
{
	int res, s;
	res = hotkey_get_wlsw(&s);
	if (res < 0)
		return res;

	return snprintf(buf, PAGE_SIZE, "%d\n", !!s);
}

static struct device_attribute dev_attr_hotkey_radio_sw =
	__ATTR(hotkey_radio_sw, S_IRUGO, hotkey_radio_sw_show, NULL);

/* sysfs hotkey report_mode -------------------------------------------- */
static ssize_t hotkey_report_mode_show(struct device *dev,
			   struct device_attribute *attr,
			   char *buf)
{
	return snprintf(buf, PAGE_SIZE, "%d\n",
		(hotkey_report_mode != 0) ? hotkey_report_mode : 1);
}

static struct device_attribute dev_attr_hotkey_report_mode =
	__ATTR(hotkey_report_mode, S_IRUGO, hotkey_report_mode_show, NULL);

/* --------------------------------------------------------------------- */

static struct attribute *hotkey_attributes[] __initdata = {
	&dev_attr_hotkey_enable.attr,
	&dev_attr_hotkey_report_mode.attr,
};

static struct attribute *hotkey_mask_attributes[] __initdata = {
	&dev_attr_hotkey_mask.attr,
	&dev_attr_hotkey_bios_enabled.attr,
	&dev_attr_hotkey_bios_mask.attr,
	&dev_attr_hotkey_all_mask.attr,
	&dev_attr_hotkey_recommended_mask.attr,
};

static int __init hotkey_init(struct ibm_init_struct *iibm)
{
	/* Requirements for changing the default keymaps:
	 *
	 * 1. Many of the keys are mapped to KEY_RESERVED for very
	 *    good reasons.  Do not change them unless you have deep
	 *    knowledge on the IBM and Lenovo ThinkPad firmware for
	 *    the various ThinkPad models.  The driver behaves
	 *    differently for KEY_RESERVED: such keys have their
	 *    hot key mask *unset* in mask_recommended, and also
	 *    in the initial hot key mask programmed into the
	 *    firmware at driver load time, which means the firm-
	 *    ware may react very differently if you change them to
	 *    something else;
	 *
	 * 2. You must be subscribed to the linux-thinkpad and
	 *    ibm-acpi-devel mailing lists, and you should read the
	 *    list archives since 2007 if you want to change the
	 *    keymaps.  This requirement exists so that you will
	 *    know the past history of problems with the thinkpad-
	 *    acpi driver keymaps, and also that you will be
	 *    listening to any bug reports;
	 *
	 * 3. Do not send thinkpad-acpi specific patches directly to
	 *    for merging, *ever*.  Send them to the linux-acpi
	 *    mailinglist for comments.  Merging is to be done only
	 *    through acpi-test and the ACPI maintainer.
	 *
	 * If the above is too much to ask, don't change the keymap.
	 * Ask the thinkpad-acpi maintainer to do it, instead.
	 */
	static u16 ibm_keycode_map[] __initdata = {
		/* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */
		KEY_FN_F1,	KEY_FN_F2,	KEY_COFFEE,	KEY_SLEEP,
		KEY_WLAN,	KEY_FN_F6, KEY_SWITCHVIDEOMODE, KEY_FN_F8,
		KEY_FN_F9,	KEY_FN_F10,	KEY_FN_F11,	KEY_SUSPEND,

		/* Scan codes 0x0C to 0x1F: Other ACPI HKEY hot keys */
		KEY_UNKNOWN,	/* 0x0C: FN+BACKSPACE */
		KEY_UNKNOWN,	/* 0x0D: FN+INSERT */
		KEY_UNKNOWN,	/* 0x0E: FN+DELETE */

		/* brightness: firmware always reacts to them, unless
		 * X.org did some tricks in the radeon BIOS scratch
		 * registers of *some* models */
		KEY_RESERVED,	/* 0x0F: FN+HOME (brightness up) */
		KEY_RESERVED,	/* 0x10: FN+END (brightness down) */

		/* Thinklight: firmware always react to it */
		KEY_RESERVED,	/* 0x11: FN+PGUP (thinklight toggle) */

		KEY_UNKNOWN,	/* 0x12: FN+PGDOWN */
		KEY_ZOOM,	/* 0x13: FN+SPACE (zoom) */

		/* Volume: firmware always react to it and reprograms
		 * the built-in *extra* mixer.  Never map it to control
		 * another mixer by default. */
		KEY_RESERVED,	/* 0x14: VOLUME UP */
		KEY_RESERVED,	/* 0x15: VOLUME DOWN */
		KEY_RESERVED,	/* 0x16: MUTE */

		KEY_VENDOR,	/* 0x17: Thinkpad/AccessIBM/Lenovo */

		/* (assignments unknown, please report if found) */
		KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
		KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
	};
	static u16 lenovo_keycode_map[] __initdata = {
		/* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */
		KEY_FN_F1,	KEY_COFFEE,	KEY_BATTERY,	KEY_SLEEP,
		KEY_WLAN,	KEY_FN_F6, KEY_SWITCHVIDEOMODE, KEY_FN_F8,
		KEY_FN_F9,	KEY_FN_F10,	KEY_FN_F11,	KEY_SUSPEND,

		/* Scan codes 0x0C to 0x1F: Other ACPI HKEY hot keys */
		KEY_UNKNOWN,	/* 0x0C: FN+BACKSPACE */
		KEY_UNKNOWN,	/* 0x0D: FN+INSERT */
		KEY_UNKNOWN,	/* 0x0E: FN+DELETE */

		KEY_RESERVED,	/* 0x0F: FN+HOME (brightness up) */
		KEY_RESERVED,	/* 0x10: FN+END (brightness down) */

		KEY_RESERVED,	/* 0x11: FN+PGUP (thinklight toggle) */

		KEY_UNKNOWN,	/* 0x12: FN+PGDOWN */
		KEY_ZOOM,	/* 0x13: FN+SPACE (zoom) */

		/* Volume: z60/z61, T60 (BIOS version?): firmware always
		 * react to it and reprograms the built-in *extra* mixer.
		 * Never map it to control another mixer by default.
		 *
		 * T60?, T61, R60?, R61: firmware and EC tries to send
		 * these over the regular keyboard, so these are no-ops,
		 * but there are still weird bugs re. MUTE, so do not
		 * change unless you get test reports from all Lenovo
		 * models.  May cause the BIOS to interfere with the
		 * HDA mixer.
		 */
		KEY_RESERVED,	/* 0x14: VOLUME UP */
		KEY_RESERVED,	/* 0x15: VOLUME DOWN */
		KEY_RESERVED,	/* 0x16: MUTE */

		KEY_VENDOR,	/* 0x17: Thinkpad/AccessIBM/Lenovo */

		/* (assignments unknown, please report if found) */
		KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
		KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
	};

#define TPACPI_HOTKEY_MAP_LEN		ARRAY_SIZE(ibm_keycode_map)
#define TPACPI_HOTKEY_MAP_SIZE		sizeof(ibm_keycode_map)
#define TPACPI_HOTKEY_MAP_TYPESIZE	sizeof(ibm_keycode_map[0])

	int res, i;
	int status;
	int hkeyv;

	vdbg_printk(TPACPI_DBG_INIT, "initializing hotkey subdriver\n");

	BUG_ON(!tpacpi_inputdev);

	IBM_ACPIHANDLE_INIT(hkey);
	mutex_init(&hotkey_mutex);

	/* hotkey not supported on 570 */
	tp_features.hotkey = hkey_handle != NULL;

	vdbg_printk(TPACPI_DBG_INIT, "hotkeys are %s\n",
		str_supported(tp_features.hotkey));

	if (tp_features.hotkey) {
		hotkey_dev_attributes = create_attr_set(8, NULL);
		if (!hotkey_dev_attributes)
			return -ENOMEM;
		res = add_many_to_attr_set(hotkey_dev_attributes,
				hotkey_attributes,
				ARRAY_SIZE(hotkey_attributes));
		if (res)
			return res;

		/* mask not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
		   A30, R30, R31, T20-22, X20-21, X22-24.  Detected by checking
		   for HKEY interface version 0x100 */
		if (acpi_evalf(hkey_handle, &hkeyv, "MHKV", "qd")) {
			if ((hkeyv >> 8) != 1) {
				printk(IBM_ERR "unknown version of the "
				       "HKEY interface: 0x%x\n", hkeyv);
				printk(IBM_ERR "please report this to %s\n",
				       IBM_MAIL);
			} else {
				/*
				 * MHKV 0x100 in A31, R40, R40e,
				 * T4x, X31, and later
				 * */
				tp_features.hotkey_mask = 1;
			}
		}

		vdbg_printk(TPACPI_DBG_INIT, "hotkey masks are %s\n",
			str_supported(tp_features.hotkey_mask));

		if (tp_features.hotkey_mask) {
			if (!acpi_evalf(hkey_handle, &hotkey_all_mask,
					"MHKA", "qd")) {
				printk(IBM_ERR
				       "missing MHKA handler, "
				       "please report this to %s\n",
				       IBM_MAIL);
				hotkey_all_mask = 0x080cU; /* FN+F12, FN+F4, FN+F3 */
			}
		}

		res = hotkey_get(&hotkey_orig_status, &hotkey_orig_mask);
		if (!res && tp_features.hotkey_mask) {
			res = add_many_to_attr_set(hotkey_dev_attributes,
				hotkey_mask_attributes,
				ARRAY_SIZE(hotkey_mask_attributes));
		}

		/* Not all thinkpads have a hardware radio switch */
		if (!res && acpi_evalf(hkey_handle, &status, "WLSW", "qd")) {
			tp_features.hotkey_wlsw = 1;
			printk(IBM_INFO
				"radio switch found; radios are %s\n",
				enabled(status, 0));
			res = add_to_attr_set(hotkey_dev_attributes,
					&dev_attr_hotkey_radio_sw.attr);
		}

		if (!res)
			res = register_attr_set_with_sysfs(
					hotkey_dev_attributes,
					&tpacpi_pdev->dev.kobj);
		if (res)
			return res;

		/* Set up key map */

		hotkey_keycode_map = kmalloc(TPACPI_HOTKEY_MAP_SIZE,
						GFP_KERNEL);
		if (!hotkey_keycode_map) {
			printk(IBM_ERR "failed to allocate memory for key map\n");
			return -ENOMEM;
		}

		if (thinkpad_id.vendor == PCI_VENDOR_ID_LENOVO) {
			dbg_printk(TPACPI_DBG_INIT,
				   "using Lenovo default hot key map\n");
			memcpy(hotkey_keycode_map, &lenovo_keycode_map,
				TPACPI_HOTKEY_MAP_SIZE);
		} else {
			dbg_printk(TPACPI_DBG_INIT,
				   "using IBM default hot key map\n");
			memcpy(hotkey_keycode_map, &ibm_keycode_map,
				TPACPI_HOTKEY_MAP_SIZE);
		}

		set_bit(EV_KEY, tpacpi_inputdev->evbit);
		set_bit(EV_MSC, tpacpi_inputdev->evbit);
		set_bit(MSC_SCAN, tpacpi_inputdev->mscbit);
		tpacpi_inputdev->keycodesize = TPACPI_HOTKEY_MAP_TYPESIZE;
		tpacpi_inputdev->keycodemax = TPACPI_HOTKEY_MAP_LEN;
		tpacpi_inputdev->keycode = hotkey_keycode_map;
		for (i = 0; i < TPACPI_HOTKEY_MAP_LEN; i++) {
			if (hotkey_keycode_map[i] != KEY_RESERVED) {
				set_bit(hotkey_keycode_map[i],
					tpacpi_inputdev->keybit);
			} else {
				if (i < sizeof(hotkey_reserved_mask)*8)
					hotkey_reserved_mask |= 1 << i;
			}
		}

		if (tp_features.hotkey_wlsw) {
			set_bit(EV_SW, tpacpi_inputdev->evbit);
			set_bit(SW_RADIO, tpacpi_inputdev->swbit);
		}

		dbg_printk(TPACPI_DBG_INIT,
				"enabling hot key handling\n");
		res = hotkey_set(1, (hotkey_all_mask & ~hotkey_reserved_mask)
					| hotkey_orig_mask);
		if (res)
			return res;

		dbg_printk(TPACPI_DBG_INIT,
				"legacy hot key reporting over procfs %s\n",
				(hotkey_report_mode < 2) ?
					"enabled" : "disabled");
	}

	return (tp_features.hotkey)? 0 : 1;
}

static void hotkey_exit(void)
{
	int res;

	if (tp_features.hotkey) {
		dbg_printk(TPACPI_DBG_EXIT, "restoring original hotkey mask\n");
		res = hotkey_set(hotkey_orig_status, hotkey_orig_mask);
		if (res)
			printk(IBM_ERR "failed to restore hotkey to BIOS defaults\n");
	}

	if (hotkey_dev_attributes) {
		delete_attr_set(hotkey_dev_attributes, &tpacpi_pdev->dev.kobj);
		hotkey_dev_attributes = NULL;
	}
}

static void tpacpi_input_send_key(unsigned int scancode,
				  unsigned int keycode)
{
	if (keycode != KEY_RESERVED) {
		mutex_lock(&tpacpi_inputdev_send_mutex);

		input_report_key(tpacpi_inputdev, keycode, 1);
		if (keycode == KEY_UNKNOWN)
			input_event(tpacpi_inputdev, EV_MSC, MSC_SCAN,
				    scancode);
		input_sync(tpacpi_inputdev);

		input_report_key(tpacpi_inputdev, keycode, 0);
		if (keycode == KEY_UNKNOWN)
			input_event(tpacpi_inputdev, EV_MSC, MSC_SCAN,
				    scancode);
		input_sync(tpacpi_inputdev);

		mutex_unlock(&tpacpi_inputdev_send_mutex);
	}
}

static void tpacpi_input_send_radiosw(void)
{
	int wlsw;

	mutex_lock(&tpacpi_inputdev_send_mutex);

	if (tp_features.hotkey_wlsw && !hotkey_get_wlsw(&wlsw)) {
		input_report_switch(tpacpi_inputdev,
				    SW_RADIO, !!wlsw);
		input_sync(tpacpi_inputdev);
	}

	mutex_unlock(&tpacpi_inputdev_send_mutex);
}

static void hotkey_notify(struct ibm_struct *ibm, u32 event)
{
	u32 hkey;
	unsigned int keycode, scancode;
	int send_acpi_ev;
	int ignore_acpi_ev;

	if (event != 0x80) {
		printk(IBM_ERR "unknown HKEY notification event %d\n", event);
		/* forward it to userspace, maybe it knows how to handle it */
		acpi_bus_generate_netlink_event(ibm->acpi->device->pnp.device_class,
						ibm->acpi->device->dev.bus_id,
						event, 0);
		return;
	}

	while (1) {
		if (!acpi_evalf(hkey_handle, &hkey, "MHKP", "d")) {
			printk(IBM_ERR "failed to retrieve HKEY event\n");
			return;
		}

		if (hkey == 0) {
			/* queue empty */
			return;
		}

		send_acpi_ev = 0;
		ignore_acpi_ev = 0;

		switch (hkey >> 12) {
		case 1:
			/* 0x1000-0x1FFF: key presses */
			scancode = hkey & 0xfff;
			if (scancode > 0 && scancode < 0x21) {
				scancode--;
				keycode = hotkey_keycode_map[scancode];
				tpacpi_input_send_key(scancode, keycode);
			} else {
				printk(IBM_ERR
				       "hotkey 0x%04x out of range for keyboard map\n",
				       hkey);
				send_acpi_ev = 1;
			}
			break;
		case 5:
			/* 0x5000-0x5FFF: LID */
			/* we don't handle it through this path, just
			 * eat up known LID events */
			if (hkey != 0x5001 && hkey != 0x5002) {
				printk(IBM_ERR
				       "unknown LID-related HKEY event: 0x%04x\n",
				       hkey);
				send_acpi_ev = 1;
			} else {
				ignore_acpi_ev = 1;
			}
			break;
		case 7:
			/* 0x7000-0x7FFF: misc */
			if (tp_features.hotkey_wlsw && hkey == 0x7000) {
				tpacpi_input_send_radiosw();
				break;
			}
			/* fallthrough to default */
		default:
			/* case 2: dock-related */
			/*	0x2305 - T43 waking up due to bay lever eject while aslept */
			/* case 3: ultra-bay related. maybe bay in dock? */
			/*	0x3003 - T43 after wake up by bay lever eject (0x2305) */
			printk(IBM_NOTICE "unhandled HKEY event 0x%04x\n", hkey);
			send_acpi_ev = 1;
		}

		/* Legacy events */
		if (!ignore_acpi_ev && (send_acpi_ev || hotkey_report_mode < 2)) {
			acpi_bus_generate_proc_event(ibm->acpi->device, event, hkey);
		}

		/* netlink events */
		if (!ignore_acpi_ev && send_acpi_ev) {
			acpi_bus_generate_netlink_event(ibm->acpi->device->pnp.device_class,
							ibm->acpi->device->dev.bus_id,
							event, hkey);
		}
	}
}

static void hotkey_resume(void)
{
	tpacpi_input_send_radiosw();
}

/*
 * Call with hotkey_mutex held
 */
static int hotkey_get(int *status, u32 *mask)
{
	if (!acpi_evalf(hkey_handle, status, "DHKC", "d"))
		return -EIO;

	if (tp_features.hotkey_mask)
		if (!acpi_evalf(hkey_handle, mask, "DHKN", "d"))
			return -EIO;

	return 0;
}

/*
 * Call with hotkey_mutex held
 */
static int hotkey_set(int status, u32 mask)
{
	int i;

	if (!acpi_evalf(hkey_handle, NULL, "MHKC", "vd", status))
		return -EIO;

	if (tp_features.hotkey_mask)
		for (i = 0; i < 32; i++) {
			int bit = ((1 << i) & mask) != 0;
			if (!acpi_evalf(hkey_handle,
					NULL, "MHKM", "vdd", i + 1, bit))
				return -EIO;
		}

	return 0;
}

/* procfs -------------------------------------------------------------- */
static int hotkey_read(char *p)
{
	int res, status;
	u32 mask;
	int len = 0;

	if (!tp_features.hotkey) {
		len += sprintf(p + len, "status:\t\tnot supported\n");
		return len;
	}

	if (mutex_lock_interruptible(&hotkey_mutex))
		return -ERESTARTSYS;
	res = hotkey_get(&status, &mask);
	mutex_unlock(&hotkey_mutex);
	if (res)
		return res;

	len += sprintf(p + len, "status:\t\t%s\n", enabled(status, 0));
	if (tp_features.hotkey_mask) {
		len += sprintf(p + len, "mask:\t\t0x%08x\n", mask);
		len += sprintf(p + len,
			       "commands:\tenable, disable, reset, <mask>\n");
	} else {
		len += sprintf(p + len, "mask:\t\tnot supported\n");
		len += sprintf(p + len, "commands:\tenable, disable, reset\n");
	}

	return len;
}

static int hotkey_write(char *buf)
{
	int res, status;
	u32 mask;
	char *cmd;
	int do_cmd = 0;

	if (!tp_features.hotkey)
		return -ENODEV;

	if (mutex_lock_interruptible(&hotkey_mutex))
		return -ERESTARTSYS;

	res = hotkey_get(&status, &mask);
	if (res)
		goto errexit;

	res = 0;
	while ((cmd = next_cmd(&buf))) {
		if (strlencmp(cmd, "enable") == 0) {
			status = 1;
		} else if (strlencmp(cmd, "disable") == 0) {
			status = 0;
		} else if (strlencmp(cmd, "reset") == 0) {
			status = hotkey_orig_status;
			mask = hotkey_orig_mask;
		} else if (sscanf(cmd, "0x%x", &mask) == 1) {
			/* mask set */
		} else if (sscanf(cmd, "%x", &mask) == 1) {
			/* mask set */
		} else {
			res = -EINVAL;
			goto errexit;
		}
		do_cmd = 1;
	}

	if (do_cmd)
		res = hotkey_set(status, mask);

errexit:
	mutex_unlock(&hotkey_mutex);
	return res;
}

static const struct acpi_device_id ibm_htk_device_ids[] = {
	{IBM_HKEY_HID, 0},
	{"", 0},
};

static struct tp_acpi_drv_struct ibm_hotkey_acpidriver = {
	.hid = ibm_htk_device_ids,
	.notify = hotkey_notify,
	.handle = &hkey_handle,
	.type = ACPI_DEVICE_NOTIFY,
};

static struct ibm_struct hotkey_driver_data = {
	.name = "hotkey",
	.read = hotkey_read,
	.write = hotkey_write,
	.exit = hotkey_exit,
	.resume = hotkey_resume,
	.acpi = &ibm_hotkey_acpidriver,
};

/*************************************************************************
 * Bluetooth subdriver
 */

/* sysfs bluetooth enable ---------------------------------------------- */
static ssize_t bluetooth_enable_show(struct device *dev,
			   struct device_attribute *attr,
			   char *buf)
{
	int status;

	status = bluetooth_get_radiosw();
	if (status < 0)
		return status;

	return snprintf(buf, PAGE_SIZE, "%d\n", status ? 1 : 0);
}

static ssize_t bluetooth_enable_store(struct device *dev,
			    struct device_attribute *attr,
			    const char *buf, size_t count)
{
	unsigned long t;
	int res;

	if (parse_strtoul(buf, 1, &t))
		return -EINVAL;

	res = bluetooth_set_radiosw(t);

	return (res) ? res : count;
}

static struct device_attribute dev_attr_bluetooth_enable =
	__ATTR(bluetooth_enable, S_IWUSR | S_IRUGO,
		bluetooth_enable_show, bluetooth_enable_store);

/* --------------------------------------------------------------------- */

static struct attribute *bluetooth_attributes[] = {
	&dev_attr_bluetooth_enable.attr,
	NULL
};

static const struct attribute_group bluetooth_attr_group = {
	.attrs = bluetooth_attributes,
};

static int __init bluetooth_init(struct ibm_init_struct *iibm)
{
	int res;
	int status = 0;

	vdbg_printk(TPACPI_DBG_INIT, "initializing bluetooth subdriver\n");

	IBM_ACPIHANDLE_INIT(hkey);

	/* bluetooth not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
	   G4x, R30, R31, R40e, R50e, T20-22, X20-21 */
	tp_features.bluetooth = hkey_handle &&
	    acpi_evalf(hkey_handle, &status, "GBDC", "qd");

	vdbg_printk(TPACPI_DBG_INIT, "bluetooth is %s, status 0x%02x\n",
		str_supported(tp_features.bluetooth),
		status);

	if (tp_features.bluetooth) {
		if (!(status & TP_ACPI_BLUETOOTH_HWPRESENT)) {
			/* no bluetooth hardware present in system */
			tp_features.bluetooth = 0;
			dbg_printk(TPACPI_DBG_INIT,
				   "bluetooth hardware not installed\n");
		} else {
			res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
					&bluetooth_attr_group);
			if (res)
				return res;
		}
	}

	return (tp_features.bluetooth)? 0 : 1;
}

static void bluetooth_exit(void)
{
	sysfs_remove_group(&tpacpi_pdev->dev.kobj,
			&bluetooth_attr_group);
}

static int bluetooth_get_radiosw(void)
{
	int status;

	if (!tp_features.bluetooth)
		return -ENODEV;

	if (!acpi_evalf(hkey_handle, &status, "GBDC", "d"))
		return -EIO;

	return ((status & TP_ACPI_BLUETOOTH_RADIOSSW) != 0);
}

static int bluetooth_set_radiosw(int radio_on)
{
	int status;

	if (!tp_features.bluetooth)
		return -ENODEV;

	if (!acpi_evalf(hkey_handle, &status, "GBDC", "d"))
		return -EIO;
	if (radio_on)
		status |= TP_ACPI_BLUETOOTH_RADIOSSW;
	else
		status &= ~TP_ACPI_BLUETOOTH_RADIOSSW;
	if (!acpi_evalf(hkey_handle, NULL, "SBDC", "vd", status))
		return -EIO;

	return 0;
}

/* procfs -------------------------------------------------------------- */
static int bluetooth_read(char *p)
{
	int len = 0;
	int status = bluetooth_get_radiosw();

	if (!tp_features.bluetooth)
		len += sprintf(p + len, "status:\t\tnot supported\n");
	else {
		len += sprintf(p + len, "status:\t\t%s\n",
				(status)? "enabled" : "disabled");
		len += sprintf(p + len, "commands:\tenable, disable\n");
	}

	return len;
}

static int bluetooth_write(char *buf)
{
	char *cmd;

	if (!tp_features.bluetooth)
		return -ENODEV;

	while ((cmd = next_cmd(&buf))) {
		if (strlencmp(cmd, "enable") == 0) {
			bluetooth_set_radiosw(1);
		} else if (strlencmp(cmd, "disable") == 0) {
			bluetooth_set_radiosw(0);
		} else
			return -EINVAL;
	}

	return 0;
}

static struct ibm_struct bluetooth_driver_data = {
	.name = "bluetooth",
	.read = bluetooth_read,
	.write = bluetooth_write,
	.exit = bluetooth_exit,
};

/*************************************************************************
 * Wan subdriver
 */

/* sysfs wan enable ---------------------------------------------------- */
static ssize_t wan_enable_show(struct device *dev,
			   struct device_attribute *attr,
			   char *buf)
{
	int status;

	status = wan_get_radiosw();
	if (status < 0)
		return status;

	return snprintf(buf, PAGE_SIZE, "%d\n", status ? 1 : 0);
}

static ssize_t wan_enable_store(struct device *dev,
			    struct device_attribute *attr,
			    const char *buf, size_t count)
{
	unsigned long t;
	int res;

	if (parse_strtoul(buf, 1, &t))
		return -EINVAL;

	res = wan_set_radiosw(t);

	return (res) ? res : count;
}

static struct device_attribute dev_attr_wan_enable =
	__ATTR(wwan_enable, S_IWUSR | S_IRUGO,
		wan_enable_show, wan_enable_store);

/* --------------------------------------------------------------------- */

static struct attribute *wan_attributes[] = {
	&dev_attr_wan_enable.attr,
	NULL
};

static const struct attribute_group wan_attr_group = {
	.attrs = wan_attributes,
};

static int __init wan_init(struct ibm_init_struct *iibm)
{
	int res;
	int status = 0;

	vdbg_printk(TPACPI_DBG_INIT, "initializing wan subdriver\n");

	IBM_ACPIHANDLE_INIT(hkey);

	tp_features.wan = hkey_handle &&
	    acpi_evalf(hkey_handle, &status, "GWAN", "qd");

	vdbg_printk(TPACPI_DBG_INIT, "wan is %s, status 0x%02x\n",
		str_supported(tp_features.wan),
		status);

	if (tp_features.wan) {
		if (!(status & TP_ACPI_WANCARD_HWPRESENT)) {
			/* no wan hardware present in system */
			tp_features.wan = 0;
			dbg_printk(TPACPI_DBG_INIT,
				   "wan hardware not installed\n");
		} else {
			res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
					&wan_attr_group);
			if (res)
				return res;
		}
	}

	return (tp_features.wan)? 0 : 1;
}

static void wan_exit(void)
{
	sysfs_remove_group(&tpacpi_pdev->dev.kobj,
		&wan_attr_group);
}

static int wan_get_radiosw(void)
{
	int status;

	if (!tp_features.wan)
		return -ENODEV;

	if (!acpi_evalf(hkey_handle, &status, "GWAN", "d"))
		return -EIO;

	return ((status & TP_ACPI_WANCARD_RADIOSSW) != 0);
}

static int wan_set_radiosw(int radio_on)
{
	int status;

	if (!tp_features.wan)
		return -ENODEV;

	if (!acpi_evalf(hkey_handle, &status, "GWAN", "d"))
		return -EIO;
	if (radio_on)
		status |= TP_ACPI_WANCARD_RADIOSSW;
	else
		status &= ~TP_ACPI_WANCARD_RADIOSSW;
	if (!acpi_evalf(hkey_handle, NULL, "SWAN", "vd", status))
		return -EIO;

	return 0;
}

/* procfs -------------------------------------------------------------- */
static int wan_read(char *p)
{
	int len = 0;
	int status = wan_get_radiosw();

	if (!tp_features.wan)
		len += sprintf(p + len, "status:\t\tnot supported\n");
	else {
		len += sprintf(p + len, "status:\t\t%s\n",
				(status)? "enabled" : "disabled");
		len += sprintf(p + len, "commands:\tenable, disable\n");
	}

	return len;
}

static int wan_write(char *buf)
{
	char *cmd;

	if (!tp_features.wan)
		return -ENODEV;

	while ((cmd = next_cmd(&buf))) {
		if (strlencmp(cmd, "enable") == 0) {
			wan_set_radiosw(1);
		} else if (strlencmp(cmd, "disable") == 0) {
			wan_set_radiosw(0);
		} else
			return -EINVAL;
	}

	return 0;
}

static struct ibm_struct wan_driver_data = {
	.name = "wan",
	.read = wan_read,
	.write = wan_write,
	.exit = wan_exit,
	.flags.experimental = 1,
};

/*************************************************************************
 * Video subdriver
 */

static enum video_access_mode video_supported;
static int video_orig_autosw;

IBM_HANDLE(vid, root, "\\_SB.PCI.AGP.VGA",	/* 570 */
	   "\\_SB.PCI0.AGP0.VID0",	/* 600e/x, 770x */
	   "\\_SB.PCI0.VID0",	/* 770e */
	   "\\_SB.PCI0.VID",	/* A21e, G4x, R50e, X30, X40 */
	   "\\_SB.PCI0.AGP.VID",	/* all others */
	   );				/* R30, R31 */

IBM_HANDLE(vid2, root, "\\_SB.PCI0.AGPB.VID");	/* G41 */

static int __init video_init(struct ibm_init_struct *iibm)
{
	int ivga;

	vdbg_printk(TPACPI_DBG_INIT, "initializing video subdriver\n");

	IBM_ACPIHANDLE_INIT(vid);
	IBM_ACPIHANDLE_INIT(vid2);

	if (vid2_handle && acpi_evalf(NULL, &ivga, "\\IVGA", "d") && ivga)
		/* G41, assume IVGA doesn't change */
		vid_handle = vid2_handle;

	if (!vid_handle)
		/* video switching not supported on R30, R31 */
		video_supported = TPACPI_VIDEO_NONE;
	else if (acpi_evalf(vid_handle, &video_orig_autosw, "SWIT", "qd"))
		/* 570 */
		video_supported = TPACPI_VIDEO_570;
	else if (acpi_evalf(vid_handle, &video_orig_autosw, "^VADL", "qd"))
		/* 600e/x, 770e, 770x */
		video_supported = TPACPI_VIDEO_770;
	else
		/* all others */
		video_supported = TPACPI_VIDEO_NEW;

	vdbg_printk(TPACPI_DBG_INIT, "video is %s, mode %d\n",
		str_supported(video_supported != TPACPI_VIDEO_NONE),
		video_supported);

	return (video_supported != TPACPI_VIDEO_NONE)? 0 : 1;
}

static void video_exit(void)
{
	dbg_printk(TPACPI_DBG_EXIT,
		   "restoring original video autoswitch mode\n");
	if (video_autosw_set(video_orig_autosw))
		printk(IBM_ERR "error while trying to restore original "
			"video autoswitch mode\n");
}

static int video_outputsw_get(void)
{
	int status = 0;
	int i;

	switch (video_supported) {
	case TPACPI_VIDEO_570:
		if (!acpi_evalf(NULL, &i, "\\_SB.PHS", "dd",
				 TP_ACPI_VIDEO_570_PHSCMD))
			return -EIO;
		status = i & TP_ACPI_VIDEO_570_PHSMASK;
		break;
	case TPACPI_VIDEO_770:
		if (!acpi_evalf(NULL, &i, "\\VCDL", "d"))
			return -EIO;
		if (i)
			status |= TP_ACPI_VIDEO_S_LCD;
		if (!acpi_evalf(NULL, &i, "\\VCDC", "d"))
			return -EIO;
		if (i)
			status |= TP_ACPI_VIDEO_S_CRT;
		break;
	case TPACPI_VIDEO_NEW:
		if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 1) ||
		    !acpi_evalf(NULL, &i, "\\VCDC", "d"))
			return -EIO;
		if (i)
			status |= TP_ACPI_VIDEO_S_CRT;

		if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0) ||
		    !acpi_evalf(NULL, &i, "\\VCDL", "d"))
			return -EIO;
		if (i)
			status |= TP_ACPI_VIDEO_S_LCD;
		if (!acpi_evalf(NULL, &i, "\\VCDD", "d"))
			return -EIO;
		if (i)
			status |= TP_ACPI_VIDEO_S_DVI;
		break;
	default:
		return -ENOSYS;
	}

	return status;
}

static int video_outputsw_set(int status)
{
	int autosw;
	int res = 0;

	switch (video_supported) {
	case TPACPI_VIDEO_570:
		res = acpi_evalf(NULL, NULL,
				 "\\_SB.PHS2", "vdd",
				 TP_ACPI_VIDEO_570_PHS2CMD,
				 status | TP_ACPI_VIDEO_570_PHS2SET);
		break;
	case TPACPI_VIDEO_770:
		autosw = video_autosw_get();
		if (autosw < 0)
			return autosw;

		res = video_autosw_set(1);
		if (res)
			return res;
		res = acpi_evalf(vid_handle, NULL,
				 "ASWT", "vdd", status * 0x100, 0);
		if (!autosw && video_autosw_set(autosw)) {
			printk(IBM_ERR "video auto-switch left enabled due to error\n");
			return -EIO;
		}
		break;
	case TPACPI_VIDEO_NEW:
		res = acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0x80) &&
			acpi_evalf(NULL, NULL, "\\VSDS", "vdd", status, 1);
		break;
	default:
		return -ENOSYS;
	}

	return (res)? 0 : -EIO;
}

static int video_autosw_get(void)
{
	int autosw = 0;

	switch (video_supported) {
	case TPACPI_VIDEO_570:
		if (!acpi_evalf(vid_handle, &autosw, "SWIT", "d"))
			return -EIO;
		break;
	case TPACPI_VIDEO_770:
	case TPACPI_VIDEO_NEW:
		if (!acpi_evalf(vid_handle, &autosw, "^VDEE", "d"))
			return -EIO;
		break;
	default:
		return -ENOSYS;
	}

	return autosw & 1;
}

static int video_autosw_set(int enable)
{
	if (!acpi_evalf(vid_handle, NULL, "_DOS", "vd", (enable)? 1 : 0))
		return -EIO;
	return 0;
}

static int video_outputsw_cycle(void)
{
	int autosw = video_autosw_get();
	int res;

	if (autosw < 0)
		return autosw;

	switch (video_supported) {
	case TPACPI_VIDEO_570:
		res = video_autosw_set(1);
		if (res)
			return res;
		res = acpi_evalf(ec_handle, NULL, "_Q16", "v");
		break;
	case TPACPI_VIDEO_770:
	case TPACPI_VIDEO_NEW:
		res = video_autosw_set(1);
		if (res)
			return res;
		res = acpi_evalf(vid_handle, NULL, "VSWT", "v");
		break;
	default:
		return -ENOSYS;
	}
	if (!autosw && video_autosw_set(autosw)) {
		printk(IBM_ERR "video auto-switch left enabled due to error\n");
		return -EIO;
	}

	return (res)? 0 : -EIO;
}

static int video_expand_toggle(void)
{
	switch (video_supported) {
	case TPACPI_VIDEO_570:
		return acpi_evalf(ec_handle, NULL, "_Q17", "v")?
			0 : -EIO;
	case TPACPI_VIDEO_770:
		return acpi_evalf(vid_handle, NULL, "VEXP", "v")?
			0 : -EIO;
	case TPACPI_VIDEO_NEW:
		return acpi_evalf(NULL, NULL, "\\VEXP", "v")?
			0 : -EIO;
	default:
		return -ENOSYS;
	}
	/* not reached */
}

static int video_read(char *p)
{
	int status, autosw;
	int len = 0;

	if (video_supported == TPACPI_VIDEO_NONE) {
		len += sprintf(p + len, "status:\t\tnot supported\n");
		return len;
	}

	status = video_outputsw_get();
	if (status < 0)
		return status;

	autosw = video_autosw_get();
	if (autosw < 0)
		return autosw;

	len += sprintf(p + len, "status:\t\tsupported\n");
	len += sprintf(p + len, "lcd:\t\t%s\n", enabled(status, 0));
	len += sprintf(p + len, "crt:\t\t%s\n", enabled(status, 1));
	if (video_supported == TPACPI_VIDEO_NEW)
		len += sprintf(p + len, "dvi:\t\t%s\n", enabled(status, 3));
	len += sprintf(p + len, "auto:\t\t%s\n", enabled(autosw, 0));
	len += sprintf(p + len, "commands:\tlcd_enable, lcd_disable\n");
	len += sprintf(p + len, "commands:\tcrt_enable, crt_disable\n");
	if (video_supported == TPACPI_VIDEO_NEW)
		len += sprintf(p + len, "commands:\tdvi_enable, dvi_disable\n");
	len += sprintf(p + len, "commands:\tauto_enable, auto_disable\n");
	len += sprintf(p + len, "commands:\tvideo_switch, expand_toggle\n");

	return len;
}

static int video_write(char *buf)
{
	char *cmd;
	int enable, disable, status;
	int res;

	if (video_supported == TPACPI_VIDEO_NONE)
		return -ENODEV;

	enable = 0;
	disable = 0;

	while ((cmd = next_cmd(&buf))) {
		if (strlencmp(cmd, "lcd_enable") == 0) {
			enable |= TP_ACPI_VIDEO_S_LCD;
		} else if (strlencmp(cmd, "lcd_disable") == 0) {
			disable |= TP_ACPI_VIDEO_S_LCD;
		} else if (strlencmp(cmd, "crt_enable") == 0) {
			enable |= TP_ACPI_VIDEO_S_CRT;
		} else if (strlencmp(cmd, "crt_disable") == 0) {
			disable |= TP_ACPI_VIDEO_S_CRT;
		} else if (video_supported == TPACPI_VIDEO_NEW &&
			   strlencmp(cmd, "dvi_enable") == 0) {
			enable |= TP_ACPI_VIDEO_S_DVI;
		} else if (video_supported == TPACPI_VIDEO_NEW &&
			   strlencmp(cmd, "dvi_disable") == 0) {
			disable |= TP_ACPI_VIDEO_S_DVI;
		} else if (strlencmp(cmd, "auto_enable") == 0) {
			res = video_autosw_set(1);
			if (res)
				return res;
		} else if (strlencmp(cmd, "auto_disable") == 0) {
			res = video_autosw_set(0);
			if (res)
				return res;
		} else if (strlencmp(cmd, "video_switch") == 0) {
			res = video_outputsw_cycle();
			if (res)
				return res;
		} else if (strlencmp(cmd, "expand_toggle") == 0) {
			res = video_expand_toggle();
			if (res)
				return res;
		} else
			return -EINVAL;
	}

	if (enable || disable) {
		status = video_outputsw_get();
		if (status < 0)
			return status;
		res = video_outputsw_set((status & ~disable) | enable);
		if (res)
			return res;
	}

	return 0;
}

static struct ibm_struct video_driver_data = {
	.name = "video",
	.read = video_read,
	.write = video_write,
	.exit = video_exit,
};

/*************************************************************************
 * Light (thinklight) subdriver
 */

IBM_HANDLE(lght, root, "\\LGHT");	/* A21e, A2xm/p, T20-22, X20-21 */
IBM_HANDLE(ledb, ec, "LEDB");		/* G4x */

static int __init light_init(struct ibm_init_struct *iibm)
{
	vdbg_printk(TPACPI_DBG_INIT, "initializing light subdriver\n");

	IBM_ACPIHANDLE_INIT(ledb);
	IBM_ACPIHANDLE_INIT(lght);
	IBM_ACPIHANDLE_INIT(cmos);

	/* light not supported on 570, 600e/x, 770e, 770x, G4x, R30, R31 */
	tp_features.light = (cmos_handle || lght_handle) && !ledb_handle;

	if (tp_features.light)
		/* light status not supported on
		   570, 600e/x, 770e, 770x, G4x, R30, R31, R32, X20 */
		tp_features.light_status =
			acpi_evalf(ec_handle, NULL, "KBLT", "qv");

	vdbg_printk(TPACPI_DBG_INIT, "light is %s\n",
		str_supported(tp_features.light));

	return (tp_features.light)? 0 : 1;
}

static int light_read(char *p)
{
	int len = 0;
	int status = 0;

	if (!tp_features.light) {
		len += sprintf(p + len, "status:\t\tnot supported\n");
	} else if (!tp_features.light_status) {
		len += sprintf(p + len, "status:\t\tunknown\n");
		len += sprintf(p + len, "commands:\ton, off\n");
	} else {
		if (!acpi_evalf(ec_handle, &status, "KBLT", "d"))
			return -EIO;
		len += sprintf(p + len, "status:\t\t%s\n", onoff(status, 0));
		len += sprintf(p + len, "commands:\ton, off\n");
	}

	return len;
}

static int light_write(char *buf)
{
	int cmos_cmd, lght_cmd;
	char *cmd;
	int success;

	if (!tp_features.light)
		return -ENODEV;

	while ((cmd = next_cmd(&buf))) {
		if (strlencmp(cmd, "on") == 0) {
			cmos_cmd = 0x0c;
			lght_cmd = 1;
		} else if (strlencmp(cmd, "off") == 0) {
			cmos_cmd = 0x0d;
			lght_cmd = 0;
		} else
			return -EINVAL;

		success = cmos_handle ?
		    acpi_evalf(cmos_handle, NULL, NULL, "vd", cmos_cmd) :
		    acpi_evalf(lght_handle, NULL, NULL, "vd", lght_cmd);
		if (!success)
			return -EIO;
	}

	return 0;
}

static struct ibm_struct light_driver_data = {
	.name = "light",
	.read = light_read,
	.write = light_write,
};

/*************************************************************************
 * Dock subdriver
 */

#ifdef CONFIG_THINKPAD_ACPI_DOCK

IBM_HANDLE(dock, root, "\\_SB.GDCK",	/* X30, X31, X40 */
	   "\\_SB.PCI0.DOCK",	/* 600e/x,770e,770x,A2xm/p,T20-22,X20-21 */
	   "\\_SB.PCI0.PCI1.DOCK",	/* all others */
	   "\\_SB.PCI.ISA.SLCE",	/* 570 */
    );				/* A21e,G4x,R30,R31,R32,R40,R40e,R50e */

/* don't list other alternatives as we install a notify handler on the 570 */
IBM_HANDLE(pci, root, "\\_SB.PCI");	/* 570 */

static const struct acpi_device_id ibm_pci_device_ids[] = {
	{PCI_ROOT_HID_STRING, 0},
	{"", 0},
};

static struct tp_acpi_drv_struct ibm_dock_acpidriver[2] = {
	{
	 .notify = dock_notify,
	 .handle = &dock_handle,
	 .type = ACPI_SYSTEM_NOTIFY,
	},
	{
	/* THIS ONE MUST NEVER BE USED FOR DRIVER AUTOLOADING.
	 * We just use it to get notifications of dock hotplug
	 * in very old thinkpads */
	 .hid = ibm_pci_device_ids,
	 .notify = dock_notify,
	 .handle = &pci_handle,
	 .type = ACPI_SYSTEM_NOTIFY,
	},
};

static struct ibm_struct dock_driver_data[2] = {
	{
	 .name = "dock",
	 .read = dock_read,
	 .write = dock_write,
	 .acpi = &ibm_dock_acpidriver[0],
	},
	{
	 .name = "dock",
	 .acpi = &ibm_dock_acpidriver[1],
	},
};

#define dock_docked() (_sta(dock_handle) & 1)

static int __init dock_init(struct ibm_init_struct *iibm)
{
	vdbg_printk(TPACPI_DBG_INIT, "initializing dock subdriver\n");

	IBM_ACPIHANDLE_INIT(dock);

	vdbg_printk(TPACPI_DBG_INIT, "dock is %s\n",
		str_supported(dock_handle != NULL));

	return (dock_handle)? 0 : 1;
}

static int __init dock_init2(struct ibm_init_struct *iibm)
{
	int dock2_needed;

	vdbg_printk(TPACPI_DBG_INIT, "initializing dock subdriver part 2\n");

	if (dock_driver_data[0].flags.acpi_driver_registered &&
	    dock_driver_data[0].flags.acpi_notify_installed) {
		IBM_ACPIHANDLE_INIT(pci);
		dock2_needed = (pci_handle != NULL);
		vdbg_printk(TPACPI_DBG_INIT,
			    "dock PCI handler for the TP 570 is %s\n",
			    str_supported(dock2_needed));
	} else {
		vdbg_printk(TPACPI_DBG_INIT,
		"dock subdriver part 2 not required\n");
		dock2_needed = 0;
	}

	return (dock2_needed)? 0 : 1;
}

static void dock_notify(struct ibm_struct *ibm, u32 event)
{
	int docked = dock_docked();
	int pci = ibm->acpi->hid && ibm->acpi->device &&
		acpi_match_device_ids(ibm->acpi->device, ibm_pci_device_ids);
	int data;

	if (event == 1 && !pci)	/* 570 */
		data = 1;	/* button */
	else if (event == 1 && pci)	/* 570 */
		data = 3;	/* dock */
	else if (event == 3 && docked)
		data = 1;	/* button */
	else if (event == 3 && !docked)
		data = 2;	/* undock */
	else if (event == 0 && docked)
		data = 3;	/* dock */
	else {
		printk(IBM_ERR "unknown dock event %d, status %d\n",
		       event, _sta(dock_handle));
		data = 0;	/* unknown */
	}
	acpi_bus_generate_proc_event(ibm->acpi->device, event, data);
	acpi_bus_generate_netlink_event(ibm->acpi->device->pnp.device_class,
					  ibm->acpi->device->dev.bus_id,
					  event, data);
}

static int dock_read(char *p)
{
	int len = 0;
	int docked = dock_docked();

	if (!dock_handle)
		len += sprintf(p + len, "status:\t\tnot supported\n");
	else if (!docked)
		len += sprintf(p + len, "status:\t\tundocked\n");
	else {
		len += sprintf(p + len, "status:\t\tdocked\n");
		len += sprintf(p + len, "commands:\tdock, undock\n");
	}

	return len;
}

static int dock_write(char *buf)
{
	char *cmd;

	if (!dock_docked())
		return -ENODEV;

	while ((cmd = next_cmd(&buf))) {
		if (strlencmp(cmd, "undock") == 0) {
			if (!acpi_evalf(dock_handle, NULL, "_DCK", "vd", 0) ||
			    !acpi_evalf(dock_handle, NULL, "_EJ0", "vd", 1))
				return -EIO;
		} else if (strlencmp(cmd, "dock") == 0) {
			if (!acpi_evalf(dock_handle, NULL, "_DCK", "vd", 1))
				return -EIO;
		} else
			return -EINVAL;
	}

	return 0;
}

#endif /* CONFIG_THINKPAD_ACPI_DOCK */

/*************************************************************************
 * Bay subdriver
 */

#ifdef CONFIG_THINKPAD_ACPI_BAY
IBM_HANDLE(bay, root, "\\_SB.PCI.IDE.SECN.MAST",	/* 570 */
	   "\\_SB.PCI0.IDE0.IDES.IDSM",	/* 600e/x, 770e, 770x */
	   "\\_SB.PCI0.SATA.SCND.MSTR",	/* T60, X60, Z60 */
	   "\\_SB.PCI0.IDE0.SCND.MSTR",	/* all others */
	   );				/* A21e, R30, R31 */
IBM_HANDLE(bay_ej, bay, "_EJ3",	/* 600e/x, A2xm/p, A3x */
	   "_EJ0",		/* all others */
	   );			/* 570,A21e,G4x,R30,R31,R32,R40e,R50e */
IBM_HANDLE(bay2, root, "\\_SB.PCI0.IDE0.PRIM.SLAV",	/* A3x, R32 */
	   "\\_SB.PCI0.IDE0.IDEP.IDPS",	/* 600e/x, 770e, 770x */
	   );				/* all others */
IBM_HANDLE(bay2_ej, bay2, "_EJ3",	/* 600e/x, 770e, A3x */
	   "_EJ0",			/* 770x */
	   );				/* all others */

static int __init bay_init(struct ibm_init_struct *iibm)
{
	vdbg_printk(TPACPI_DBG_INIT, "initializing bay subdriver\n");

	IBM_ACPIHANDLE_INIT(bay);
	if (bay_handle)
		IBM_ACPIHANDLE_INIT(bay_ej);
	IBM_ACPIHANDLE_INIT(bay2);
	if (bay2_handle)
		IBM_ACPIHANDLE_INIT(bay2_ej);

	tp_features.bay_status = bay_handle &&
		acpi_evalf(bay_handle, NULL, "_STA", "qv");
	tp_features.bay_status2 = bay2_handle &&
		acpi_evalf(bay2_handle, NULL, "_STA", "qv");

	tp_features.bay_eject = bay_handle && bay_ej_handle &&
		(strlencmp(bay_ej_path, "_EJ0") == 0 || experimental);
	tp_features.bay_eject2 = bay2_handle && bay2_ej_handle &&
		(strlencmp(bay2_ej_path, "_EJ0") == 0 || experimental);

	vdbg_printk(TPACPI_DBG_INIT,
		"bay 1: status %s, eject %s; bay 2: status %s, eject %s\n",
		str_supported(tp_features.bay_status),
		str_supported(tp_features.bay_eject),
		str_supported(tp_features.bay_status2),
		str_supported(tp_features.bay_eject2));

	return (tp_features.bay_status || tp_features.bay_eject ||
		tp_features.bay_status2 || tp_features.bay_eject2)? 0 : 1;
}

static void bay_notify(struct ibm_struct *ibm, u32 event)
{
	acpi_bus_generate_proc_event(ibm->acpi->device, event, 0);
	acpi_bus_generate_netlink_event(ibm->acpi->device->pnp.device_class,
					  ibm->acpi->device->dev.bus_id,
					  event, 0);
}

#define bay_occupied(b) (_sta(b##_handle) & 1)

static int bay_read(char *p)
{
	int len = 0;
	int occupied = bay_occupied(bay);
	int occupied2 = bay_occupied(bay2);
	int eject, eject2;

	len += sprintf(p + len, "status:\t\t%s\n",
		tp_features.bay_status ?
			(occupied ? "occupied" : "unoccupied") :
				"not supported");
	if (tp_features.bay_status2)
		len += sprintf(p + len, "status2:\t%s\n", occupied2 ?
			       "occupied" : "unoccupied");

	eject = tp_features.bay_eject && occupied;
	eject2 = tp_features.bay_eject2 && occupied2;

	if (eject && eject2)
		len += sprintf(p + len, "commands:\teject, eject2\n");
	else if (eject)
		len += sprintf(p + len, "commands:\teject\n");
	else if (eject2)
		len += sprintf(p + len, "commands:\teject2\n");

	return len;
}

static int bay_write(char *buf)
{
	char *cmd;

	if (!tp_features.bay_eject && !tp_features.bay_eject2)
		return -ENODEV;

	while ((cmd = next_cmd(&buf))) {
		if (tp_features.bay_eject && strlencmp(cmd, "eject") == 0) {
			if (!acpi_evalf(bay_ej_handle, NULL, NULL, "vd", 1))
				return -EIO;
		} else if (tp_features.bay_eject2 &&
			   strlencmp(cmd, "eject2") == 0) {
			if (!acpi_evalf(bay2_ej_handle, NULL, NULL, "vd", 1))
				return -EIO;
		} else
			return -EINVAL;
	}

	return 0;
}

static struct tp_acpi_drv_struct ibm_bay_acpidriver = {
	.notify = bay_notify,
	.handle = &bay_handle,
	.type = ACPI_SYSTEM_NOTIFY,
};

static struct ibm_struct bay_driver_data = {
	.name = "bay",
	.read = bay_read,
	.write = bay_write,
	.acpi = &ibm_bay_acpidriver,
};

#endif /* CONFIG_THINKPAD_ACPI_BAY */

/*************************************************************************
 * CMOS subdriver
 */

/* sysfs cmos_command -------------------------------------------------- */
static ssize_t cmos_command_store(struct device *dev,
			    struct device_attribute *attr,
			    const char *buf, size_t count)
{
	unsigned long cmos_cmd;
	int res;

	if (parse_strtoul(buf, 21, &cmos_cmd))
		return -EINVAL;

	res = issue_thinkpad_cmos_command(cmos_cmd);
	return (res)? res : count;
}

static struct device_attribute dev_attr_cmos_command =
	__ATTR(cmos_command, S_IWUSR, NULL, cmos_command_store);

/* --------------------------------------------------------------------- */

static int __init cmos_init(struct ibm_init_struct *iibm)
{
	int res;

	vdbg_printk(TPACPI_DBG_INIT,
		"initializing cmos commands subdriver\n");

	IBM_ACPIHANDLE_INIT(cmos);

	vdbg_printk(TPACPI_DBG_INIT, "cmos commands are %s\n",
		str_supported(cmos_handle != NULL));

	res = device_create_file(&tpacpi_pdev->dev, &dev_attr_cmos_command);
	if (res)
		return res;

	return (cmos_handle)? 0 : 1;
}

static void cmos_exit(void)
{
	device_remove_file(&tpacpi_pdev->dev, &dev_attr_cmos_command);
}

static int cmos_read(char *p)
{
	int len = 0;

	/* cmos not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
	   R30, R31, T20-22, X20-21 */
	if (!cmos_handle)
		len += sprintf(p + len, "status:\t\tnot supported\n");
	else {
		len += sprintf(p + len, "status:\t\tsupported\n");
		len += sprintf(p + len, "commands:\t<cmd> (<cmd> is 0-21)\n");
	}

	return len;
}

static int cmos_write(char *buf)
{
	char *cmd;
	int cmos_cmd, res;

	while ((cmd = next_cmd(&buf))) {
		if (sscanf(cmd, "%u", &cmos_cmd) == 1 &&
		    cmos_cmd >= 0 && cmos_cmd <= 21) {
			/* cmos_cmd set */
		} else
			return -EINVAL;

		res = issue_thinkpad_cmos_command(cmos_cmd);
		if (res)
			return res;
	}

	return 0;
}

static struct ibm_struct cmos_driver_data = {
	.name = "cmos",
	.read = cmos_read,
	.write = cmos_write,
	.exit = cmos_exit,
};

/*************************************************************************
 * LED subdriver
 */

static enum led_access_mode led_supported;

IBM_HANDLE(led, ec, "SLED",	/* 570 */
	   "SYSL",		/* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
	   "LED",		/* all others */
	   );			/* R30, R31 */

static int __init led_init(struct ibm_init_struct *iibm)
{
	vdbg_printk(TPACPI_DBG_INIT, "initializing LED subdriver\n");

	IBM_ACPIHANDLE_INIT(led);

	if (!led_handle)
		/* led not supported on R30, R31 */
		led_supported = TPACPI_LED_NONE;
	else if (strlencmp(led_path, "SLED") == 0)
		/* 570 */
		led_supported = TPACPI_LED_570;
	else if (strlencmp(led_path, "SYSL") == 0)
		/* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
		led_supported = TPACPI_LED_OLD;
	else
		/* all others */
		led_supported = TPACPI_LED_NEW;

	vdbg_printk(TPACPI_DBG_INIT, "LED commands are %s, mode %d\n",
		str_supported(led_supported), led_supported);

	return (led_supported != TPACPI_LED_NONE)? 0 : 1;
}

#define led_status(s) ((s) == 0 ? "off" : ((s) == 1 ? "on" : "blinking"))

static int led_read(char *p)
{
	int len = 0;

	if (!led_supported) {
		len += sprintf(p + len, "status:\t\tnot supported\n");
		return len;
	}
	len += sprintf(p + len, "status:\t\tsupported\n");

	if (led_supported == TPACPI_LED_570) {
		/* 570 */
		int i, status;
		for (i = 0; i < 8; i++) {
			if (!acpi_evalf(ec_handle,
					&status, "GLED", "dd", 1 << i))
				return -EIO;
			len += sprintf(p + len, "%d:\t\t%s\n",
				       i, led_status(status));
		}
	}

	len += sprintf(p + len, "commands:\t"
		       "<led> on, <led> off, <led> blink (<led> is 0-7)\n");

	return len;
}

/* off, on, blink */
static const int led_sled_arg1[] = { 0, 1, 3 };
static const int led_exp_hlbl[] = { 0, 0, 1 };	/* led# * */
static const int led_exp_hlcl[] = { 0, 1, 1 };	/* led# * */
static const int led_led_arg1[] = { 0, 0x80, 0xc0 };

static int led_write(char *buf)
{
	char *cmd;
	int led, ind, ret;

	if (!led_supported)
		return -ENODEV;

	while ((cmd = next_cmd(&buf))) {
		if (sscanf(cmd, "%d", &led) != 1 || led < 0 || led > 7)
			return -EINVAL;

		if (strstr(cmd, "off")) {
			ind = 0;
		} else if (strstr(cmd, "on")) {
			ind = 1;
		} else if (strstr(cmd, "blink")) {
			ind = 2;
		} else
			return -EINVAL;

		if (led_supported == TPACPI_LED_570) {
			/* 570 */
			led = 1 << led;
			if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
					led, led_sled_arg1[ind]))
				return -EIO;
		} else if (led_supported == TPACPI_LED_OLD) {
			/* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20 */
			led = 1 << led;
			ret = ec_write(TPACPI_LED_EC_HLMS, led);
			if (ret >= 0)
				ret =
				    ec_write(TPACPI_LED_EC_HLBL,
				    	     led * led_exp_hlbl[ind]);
			if (ret >= 0)
				ret =
				    ec_write(TPACPI_LED_EC_HLCL,
				    	     led * led_exp_hlcl[ind]);
			if (ret < 0)
				return ret;
		} else {
			/* all others */
			if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
					led, led_led_arg1[ind]))
				return -EIO;
		}
	}

	return 0;
}

static struct ibm_struct led_driver_data = {
	.name = "led",
	.read = led_read,
	.write = led_write,
};

/*************************************************************************
 * Beep subdriver
 */

IBM_HANDLE(beep, ec, "BEEP");	/* all except R30, R31 */

static int __init beep_init(struct ibm_init_struct *iibm)
{
	vdbg_printk(TPACPI_DBG_INIT, "initializing beep subdriver\n");

	IBM_ACPIHANDLE_INIT(beep);

	vdbg_printk(TPACPI_DBG_INIT, "beep is %s\n",
		str_supported(beep_handle != NULL));

	return (beep_handle)? 0 : 1;
}

static int beep_read(char *p)
{
	int len = 0;

	if (!beep_handle)
		len += sprintf(p + len, "status:\t\tnot supported\n");
	else {
		len += sprintf(p + len, "status:\t\tsupported\n");
		len += sprintf(p + len, "commands:\t<cmd> (<cmd> is 0-17)\n");
	}

	return len;
}

static int beep_write(char *buf)
{
	char *cmd;
	int beep_cmd;

	if (!beep_handle)
		return -ENODEV;

	while ((cmd = next_cmd(&buf))) {
		if (sscanf(cmd, "%u", &beep_cmd) == 1 &&
		    beep_cmd >= 0 && beep_cmd <= 17) {
			/* beep_cmd set */
		} else
			return -EINVAL;
		if (!acpi_evalf(beep_handle, NULL, NULL, "vdd", beep_cmd, 0))
			return -EIO;
	}

	return 0;
}

static struct ibm_struct beep_driver_data = {
	.name = "beep",
	.read = beep_read,
	.write = beep_write,
};

/*************************************************************************
 * Thermal subdriver
 */

static enum thermal_access_mode thermal_read_mode;

/* sysfs temp##_input -------------------------------------------------- */

static ssize_t thermal_temp_input_show(struct device *dev,
			   struct device_attribute *attr,
			   char *buf)
{
	struct sensor_device_attribute *sensor_attr =
					to_sensor_dev_attr(attr);
	int idx = sensor_attr->index;
	s32 value;
	int res;

	res = thermal_get_sensor(idx, &value);
	if (res)
		return res;
	if (value == TP_EC_THERMAL_TMP_NA * 1000)
		return -ENXIO;

	return snprintf(buf, PAGE_SIZE, "%d\n", value);
}

#define THERMAL_SENSOR_ATTR_TEMP(_idxA, _idxB) \
	 SENSOR_ATTR(temp##_idxA##_input, S_IRUGO, thermal_temp_input_show, NULL, _idxB)

static struct sensor_device_attribute sensor_dev_attr_thermal_temp_input[] = {
	THERMAL_SENSOR_ATTR_TEMP(1, 0),
	THERMAL_SENSOR_ATTR_TEMP(2, 1),
	THERMAL_SENSOR_ATTR_TEMP(3, 2),
	THERMAL_SENSOR_ATTR_TEMP(4, 3),
	THERMAL_SENSOR_ATTR_TEMP(5, 4),
	THERMAL_SENSOR_ATTR_TEMP(6, 5),
	THERMAL_SENSOR_ATTR_TEMP(7, 6),
	THERMAL_SENSOR_ATTR_TEMP(8, 7),
	THERMAL_SENSOR_ATTR_TEMP(9, 8),
	THERMAL_SENSOR_ATTR_TEMP(10, 9),
	THERMAL_SENSOR_ATTR_TEMP(11, 10),
	THERMAL_SENSOR_ATTR_TEMP(12, 11),
	THERMAL_SENSOR_ATTR_TEMP(13, 12),
	THERMAL_SENSOR_ATTR_TEMP(14, 13),
	THERMAL_SENSOR_ATTR_TEMP(15, 14),
	THERMAL_SENSOR_ATTR_TEMP(16, 15),
};

#define THERMAL_ATTRS(X) \
	&sensor_dev_attr_thermal_temp_input[X].dev_attr.attr

static struct attribute *thermal_temp_input_attr[] = {
	THERMAL_ATTRS(8),
	THERMAL_ATTRS(9),
	THERMAL_ATTRS(10),
	THERMAL_ATTRS(11),
	THERMAL_ATTRS(12),
	THERMAL_ATTRS(13),
	THERMAL_ATTRS(14),
	THERMAL_ATTRS(15),
	THERMAL_ATTRS(0),
	THERMAL_ATTRS(1),
	THERMAL_ATTRS(2),
	THERMAL_ATTRS(3),
	THERMAL_ATTRS(4),
	THERMAL_ATTRS(5),
	THERMAL_ATTRS(6),
	THERMAL_ATTRS(7),
	NULL
};

static const struct attribute_group thermal_temp_input16_group = {
	.attrs = thermal_temp_input_attr
};

static const struct attribute_group thermal_temp_input8_group = {
	.attrs = &thermal_temp_input_attr[8]
};

#undef THERMAL_SENSOR_ATTR_TEMP
#undef THERMAL_ATTRS

/* --------------------------------------------------------------------- */

static int __init thermal_init(struct ibm_init_struct *iibm)
{
	u8 t, ta1, ta2;
	int i;
	int acpi_tmp7;
	int res;

	vdbg_printk(TPACPI_DBG_INIT, "initializing thermal subdriver\n");

	acpi_tmp7 = acpi_evalf(ec_handle, NULL, "TMP7", "qv");

	if (thinkpad_id.ec_model) {
		/*
		 * Direct EC access mode: sensors at registers
		 * 0x78-0x7F, 0xC0-0xC7.  Registers return 0x00 for
		 * non-implemented, thermal sensors return 0x80 when
		 * not available
		 */

		ta1 = ta2 = 0;
		for (i = 0; i < 8; i++) {
			if (acpi_ec_read(TP_EC_THERMAL_TMP0 + i, &t)) {
				ta1 |= t;
			} else {
				ta1 = 0;
				break;
			}
			if (acpi_ec_read(TP_EC_THERMAL_TMP8 + i, &t)) {
				ta2 |= t;
			} else {
				ta1 = 0;
				break;
			}
		}
		if (ta1 == 0) {
			/* This is sheer paranoia, but we handle it anyway */
			if (acpi_tmp7) {
				printk(IBM_ERR
				       "ThinkPad ACPI EC access misbehaving, "
				       "falling back to ACPI TMPx access mode\n");
				thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07;
			} else {
				printk(IBM_ERR
				       "ThinkPad ACPI EC access misbehaving, "
				       "disabling thermal sensors access\n");
				thermal_read_mode = TPACPI_THERMAL_NONE;
			}
		} else {
			thermal_read_mode =
			    (ta2 != 0) ?
			    TPACPI_THERMAL_TPEC_16 : TPACPI_THERMAL_TPEC_8;
		}
	} else if (acpi_tmp7) {
		if (acpi_evalf(ec_handle, NULL, "UPDT", "qv")) {
			/* 600e/x, 770e, 770x */
			thermal_read_mode = TPACPI_THERMAL_ACPI_UPDT;
		} else {
			/* Standard ACPI TMPx access, max 8 sensors */
			thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07;
		}
	} else {
		/* temperatures not supported on 570, G4x, R30, R31, R32 */
		thermal_read_mode = TPACPI_THERMAL_NONE;
	}

	vdbg_printk(TPACPI_DBG_INIT, "thermal is %s, mode %d\n",
		str_supported(thermal_read_mode != TPACPI_THERMAL_NONE),
		thermal_read_mode);

	switch(thermal_read_mode) {
	case TPACPI_THERMAL_TPEC_16:
		res = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj,
				&thermal_temp_input16_group);
		if (res)
			return res;
		break;
	case TPACPI_THERMAL_TPEC_8:
	case TPACPI_THERMAL_ACPI_TMP07:
	case TPACPI_THERMAL_ACPI_UPDT:
		res = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj,
				&thermal_temp_input8_group);
		if (res)
			return res;
		break;
	case TPACPI_THERMAL_NONE:
	default:
		return 1;
	}

	return 0;
}

static void thermal_exit(void)
{
	switch(thermal_read_mode) {
	case TPACPI_THERMAL_TPEC_16:
		sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj,
				   &thermal_temp_input16_group);
		break;
	case TPACPI_THERMAL_TPEC_8:
	case TPACPI_THERMAL_ACPI_TMP07:
	case TPACPI_THERMAL_ACPI_UPDT:
		sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj,
				   &thermal_temp_input16_group);
		break;
	case TPACPI_THERMAL_NONE:
	default:
		break;
	}
}

/* idx is zero-based */
static int thermal_get_sensor(int idx, s32 *value)
{
	int t;
	s8 tmp;
	char tmpi[5];

	t = TP_EC_THERMAL_TMP0;

	switch (thermal_read_mode) {
#if TPACPI_MAX_THERMAL_SENSORS >= 16
	case TPACPI_THERMAL_TPEC_16:
		if (idx >= 8 && idx <= 15) {
			t = TP_EC_THERMAL_TMP8;
			idx -= 8;
		}
		/* fallthrough */
#endif
	case TPACPI_THERMAL_TPEC_8:
		if (idx <= 7) {
			if (!acpi_ec_read(t + idx, &tmp))
				return -EIO;
			*value = tmp * 1000;
			return 0;
		}
		break;

	case TPACPI_THERMAL_ACPI_UPDT:
		if (idx <= 7) {
			snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx);
			if (!acpi_evalf(ec_handle, NULL, "UPDT", "v"))
				return -EIO;
			if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
				return -EIO;
			*value = (t - 2732) * 100;
			return 0;
		}
		break;

	case TPACPI_THERMAL_ACPI_TMP07:
		if (idx <= 7) {
			snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx);
			if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
				return -EIO;
			if (t > 127 || t < -127)
				t = TP_EC_THERMAL_TMP_NA;
			*value = t * 1000;
			return 0;
		}
		break;

	case TPACPI_THERMAL_NONE:
	default:
		return -ENOSYS;
	}

	return -EINVAL;
}

static int thermal_get_sensors(struct ibm_thermal_sensors_struct *s)
{
	int res, i;
	int n;

	n = 8;
	i = 0;

	if (!s)
		return -EINVAL;

	if (thermal_read_mode == TPACPI_THERMAL_TPEC_16)
		n = 16;

	for(i = 0 ; i < n; i++) {
		res = thermal_get_sensor(i, &s->temp[i]);
		if (res)
			return res;
	}

	return n;
}

static int thermal_read(char *p)
{
	int len = 0;
	int n, i;
	struct ibm_thermal_sensors_struct t;

	n = thermal_get_sensors(&t);
	if (unlikely(n < 0))
		return n;

	len += sprintf(p + len, "temperatures:\t");

	if (n > 0) {
		for (i = 0; i < (n - 1); i++)
			len += sprintf(p + len, "%d ", t.temp[i] / 1000);
		len += sprintf(p + len, "%d\n", t.temp[i] / 1000);
	} else
		len += sprintf(p + len, "not supported\n");

	return len;
}

static struct ibm_struct thermal_driver_data = {
	.name = "thermal",
	.read = thermal_read,
	.exit = thermal_exit,
};

/*************************************************************************
 * EC Dump subdriver
 */

static u8 ecdump_regs[256];

static int ecdump_read(char *p)
{
	int len = 0;
	int i, j;
	u8 v;

	len += sprintf(p + len, "EC      "
		       " +00 +01 +02 +03 +04 +05 +06 +07"
		       " +08 +09 +0a +0b +0c +0d +0e +0f\n");
	for (i = 0; i < 256; i += 16) {
		len += sprintf(p + len, "EC 0x%02x:", i);
		for (j = 0; j < 16; j++) {
			if (!acpi_ec_read(i + j, &v))
				break;
			if (v != ecdump_regs[i + j])
				len += sprintf(p + len, " *%02x", v);
			else
				len += sprintf(p + len, "  %02x", v);
			ecdump_regs[i + j] = v;
		}
		len += sprintf(p + len, "\n");
		if (j != 16)
			break;
	}

	/* These are way too dangerous to advertise openly... */
#if 0
	len += sprintf(p + len, "commands:\t0x<offset> 0x<value>"
		       " (<offset> is 00-ff, <value> is 00-ff)\n");
	len += sprintf(p + len, "commands:\t0x<offset> <value>  "
		       " (<offset> is 00-ff, <value> is 0-255)\n");
#endif
	return len;
}

static int ecdump_write(char *buf)
{
	char *cmd;
	int i, v;

	while ((cmd = next_cmd(&buf))) {
		if (sscanf(cmd, "0x%x 0x%x", &i, &v) == 2) {
			/* i and v set */
		} else if (sscanf(cmd, "0x%x %u", &i, &v) == 2) {
			/* i and v set */
		} else
			return -EINVAL;
		if (i >= 0 && i < 256 && v >= 0 && v < 256) {
			if (!acpi_ec_write(i, v))
				return -EIO;
		} else
			return -EINVAL;
	}

	return 0;
}

static struct ibm_struct ecdump_driver_data = {
	.name = "ecdump",
	.read = ecdump_read,
	.write = ecdump_write,
	.flags.experimental = 1,
};

/*************************************************************************
 * Backlight/brightness subdriver
 */

static struct backlight_device *ibm_backlight_device;

static struct backlight_ops ibm_backlight_data = {
        .get_brightness = brightness_get,
        .update_status  = brightness_update_status,
};

static struct mutex brightness_mutex;

static int __init tpacpi_query_bcll_levels(acpi_handle handle)
{
	struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
	union acpi_object *obj;
	int rc;

	if (ACPI_SUCCESS(acpi_evaluate_object(handle, NULL, NULL, &buffer))) {
		obj = (union acpi_object *)buffer.pointer;
		if (!obj || (obj->type != ACPI_TYPE_PACKAGE)) {
			printk(IBM_ERR "Unknown BCLL data, "
			       "please report this to %s\n", IBM_MAIL);
			rc = 0;
		} else {
			rc = obj->package.count;
		}
	} else {
		return 0;
	}

	kfree(buffer.pointer);
	return rc;
}

static acpi_status __init brightness_find_bcll(acpi_handle handle, u32 lvl,
					void *context, void **rv)
{
	char name[ACPI_PATH_SEGMENT_LENGTH];
	struct acpi_buffer buffer = { sizeof(name), &name };

	if (ACPI_SUCCESS(acpi_get_name(handle, ACPI_SINGLE_NAME, &buffer)) &&
	    !strncmp("BCLL", name, sizeof(name) - 1)) {
		if (tpacpi_query_bcll_levels(handle) == 16) {
			*rv = handle;
			return AE_CTRL_TERMINATE;
		} else {
			return AE_OK;
		}
	} else {
		return AE_OK;
	}
}

static int __init brightness_check_levels(void)
{
	int status;
	void *found_node = NULL;

	if (!vid_handle) {
		IBM_ACPIHANDLE_INIT(vid);
	}
	if (!vid_handle)
		return 0;

	/* Search for a BCLL package with 16 levels */
	status = acpi_walk_namespace(ACPI_TYPE_PACKAGE, vid_handle, 3,
					brightness_find_bcll, NULL, &found_node);

	return (ACPI_SUCCESS(status) && found_node != NULL);
}

static acpi_status __init brightness_find_bcl(acpi_handle handle, u32 lvl,
					void *context, void **rv)
{
	char name[ACPI_PATH_SEGMENT_LENGTH];
	struct acpi_buffer buffer = { sizeof(name), &name };

	if (ACPI_SUCCESS(acpi_get_name(handle, ACPI_SINGLE_NAME, &buffer)) &&
	    !strncmp("_BCL", name, sizeof(name) - 1)) {
		*rv = handle;
		return AE_CTRL_TERMINATE;
	} else {
		return AE_OK;
	}
}

static int __init brightness_check_std_acpi_support(void)
{
	int status;
	void *found_node = NULL;

	if (!vid_handle) {
		IBM_ACPIHANDLE_INIT(vid);
	}
	if (!vid_handle)
		return 0;

	/* Search for a _BCL method, but don't execute it */
	status = acpi_walk_namespace(ACPI_TYPE_METHOD, vid_handle, 3,
	                             brightness_find_bcl, NULL, &found_node);

	return (ACPI_SUCCESS(status) && found_node != NULL);
}

static int __init brightness_init(struct ibm_init_struct *iibm)
{
	int b;

	vdbg_printk(TPACPI_DBG_INIT, "initializing brightness subdriver\n");

	mutex_init(&brightness_mutex);

	if (!brightness_enable) {
		dbg_printk(TPACPI_DBG_INIT,
		           "brightness support disabled by module parameter\n");
		return 1;
	} else if (brightness_enable > 1) {
		if (brightness_check_std_acpi_support()) {
			printk(IBM_NOTICE
			       "standard ACPI backlight interface available, not loading native one...\n");
			return 1;
		}
	}

	if (!brightness_mode) {
		if (thinkpad_id.vendor == PCI_VENDOR_ID_LENOVO)
			brightness_mode = 2;
		else
			brightness_mode = 3;

		dbg_printk(TPACPI_DBG_INIT, "selected brightness_mode=%d\n",
			brightness_mode);
	}

	if (brightness_mode > 3)
		return -EINVAL;

	tp_features.bright_16levels =
			thinkpad_id.vendor == PCI_VENDOR_ID_LENOVO &&
			brightness_check_levels();

	b = brightness_get(NULL);
	if (b < 0)
		return 1;

	if (tp_features.bright_16levels)
		printk(IBM_INFO "detected a 16-level brightness capable ThinkPad\n");

	ibm_backlight_device = backlight_device_register(
					TPACPI_BACKLIGHT_DEV_NAME, NULL, NULL,
					&ibm_backlight_data);
	if (IS_ERR(ibm_backlight_device)) {
		printk(IBM_ERR "Could not register backlight device\n");
		return PTR_ERR(ibm_backlight_device);
	}
	vdbg_printk(TPACPI_DBG_INIT, "brightness is supported\n");

	ibm_backlight_device->props.max_brightness =
				(tp_features.bright_16levels)? 15 : 7;
	ibm_backlight_device->props.brightness = b;
	backlight_update_status(ibm_backlight_device);

	return 0;
}

static void brightness_exit(void)
{
	if (ibm_backlight_device) {
		vdbg_printk(TPACPI_DBG_EXIT,
			    "calling backlight_device_unregister()\n");
		backlight_device_unregister(ibm_backlight_device);
		ibm_backlight_device = NULL;
	}
}

static int brightness_update_status(struct backlight_device *bd)
{
	/* it is the backlight class's job (caller) to handle
	 * EINTR and other errors properly */
	return brightness_set(
		(bd->props.fb_blank == FB_BLANK_UNBLANK &&
		 bd->props.power == FB_BLANK_UNBLANK) ?
				bd->props.brightness : 0);
}

/*
 * ThinkPads can read brightness from two places: EC 0x31, or
 * CMOS NVRAM byte 0x5E, bits 0-3.
 */
static int brightness_get(struct backlight_device *bd)
{
	u8 lec = 0, lcmos = 0, level = 0;

	if (brightness_mode & 1) {
		if (!acpi_ec_read(brightness_offset, &lec))
			return -EIO;
		lec &= (tp_features.bright_16levels)? 0x0f : 0x07;
		level = lec;
	};
	if (brightness_mode & 2) {
		lcmos = (nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS)
			 & TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
			>> TP_NVRAM_POS_LEVEL_BRIGHTNESS;
		lcmos &= (tp_features.bright_16levels)? 0x0f : 0x07;
		level = lcmos;
	}

	if (brightness_mode == 3 && lec != lcmos) {
		printk(IBM_ERR
			"CMOS NVRAM (%u) and EC (%u) do not agree "
			"on display brightness level\n",
			(unsigned int) lcmos,
			(unsigned int) lec);
		return -EIO;
	}

	return level;
}

/* May return EINTR which can always be mapped to ERESTARTSYS */
static int brightness_set(int value)
{
	int cmos_cmd, inc, i, res;
	int current_value;

	if (value > ((tp_features.bright_16levels)? 15 : 7))
		return -EINVAL;

	res = mutex_lock_interruptible(&brightness_mutex);
	if (res < 0)
		return res;

	current_value = brightness_get(NULL);
	if (current_value < 0) {
		res = current_value;
		goto errout;
	}

	cmos_cmd = value > current_value ?
			TP_CMOS_BRIGHTNESS_UP :
			TP_CMOS_BRIGHTNESS_DOWN;
	inc = (value > current_value)? 1 : -1;

	res = 0;
	for (i = current_value; i != value; i += inc) {
		if ((brightness_mode & 2) &&
		    issue_thinkpad_cmos_command(cmos_cmd)) {
			res = -EIO;
			goto errout;
		}
		if ((brightness_mode & 1) &&
		    !acpi_ec_write(brightness_offset, i + inc)) {
			res = -EIO;
			goto errout;;
		}
	}

errout:
	mutex_unlock(&brightness_mutex);
	return res;
}

static int brightness_read(char *p)
{
	int len = 0;
	int level;

	if ((level = brightness_get(NULL)) < 0) {
		len += sprintf(p + len, "level:\t\tunreadable\n");
	} else {
		len += sprintf(p + len, "level:\t\t%d\n", level);
		len += sprintf(p + len, "commands:\tup, down\n");
		len += sprintf(p + len, "commands:\tlevel <level>"
			       " (<level> is 0-%d)\n",
			       (tp_features.bright_16levels) ? 15 : 7);
	}

	return len;
}

static int brightness_write(char *buf)
{
	int level;
	int rc;
	char *cmd;
	int max_level = (tp_features.bright_16levels) ? 15 : 7;

	level = brightness_get(NULL);
	if (level < 0)
		return level;

	while ((cmd = next_cmd(&buf))) {
		if (strlencmp(cmd, "up") == 0) {
			if (level < max_level)
				level++;
		} else if (strlencmp(cmd, "down") == 0) {
			if (level > 0)
				level--;
		} else if (sscanf(cmd, "level %d", &level) == 1 &&
			   level >= 0 && level <= max_level) {
			/* new level set */
		} else
			return -EINVAL;
	}

	/*
	 * Now we know what the final level should be, so we try to set it.
	 * Doing it this way makes the syscall restartable in case of EINTR
	 */
	rc = brightness_set(level);
	return (rc == -EINTR)? ERESTARTSYS : rc;
}

static struct ibm_struct brightness_driver_data = {
	.name = "brightness",
	.read = brightness_read,
	.write = brightness_write,
	.exit = brightness_exit,
};

/*************************************************************************
 * Volume subdriver
 */

static int volume_read(char *p)
{
	int len = 0;
	u8 level;

	if (!acpi_ec_read(volume_offset, &level)) {
		len += sprintf(p + len, "level:\t\tunreadable\n");
	} else {
		len += sprintf(p + len, "level:\t\t%d\n", level & 0xf);
		len += sprintf(p + len, "mute:\t\t%s\n", onoff(level, 6));
		len += sprintf(p + len, "commands:\tup, down, mute\n");
		len += sprintf(p + len, "commands:\tlevel <level>"
			       " (<level> is 0-15)\n");
	}

	return len;
}

static int volume_write(char *buf)
{
	int cmos_cmd, inc, i;
	u8 level, mute;
	int new_level, new_mute;
	char *cmd;

	while ((cmd = next_cmd(&buf))) {
		if (!acpi_ec_read(volume_offset, &level))
			return -EIO;
		new_mute = mute = level & 0x40;
		new_level = level = level & 0xf;

		if (strlencmp(cmd, "up") == 0) {
			if (mute)
				new_mute = 0;
			else
				new_level = level == 15 ? 15 : level + 1;
		} else if (strlencmp(cmd, "down") == 0) {
			if (mute)
				new_mute = 0;
			else
				new_level = level == 0 ? 0 : level - 1;
		} else if (sscanf(cmd, "level %d", &new_level) == 1 &&
			   new_level >= 0 && new_level <= 15) {
			/* new_level set */
		} else if (strlencmp(cmd, "mute") == 0) {
			new_mute = 0x40;
		} else
			return -EINVAL;

		if (new_level != level) {	/* mute doesn't change */
			cmos_cmd = new_level > level ? TP_CMOS_VOLUME_UP : TP_CMOS_VOLUME_DOWN;
			inc = new_level > level ? 1 : -1;

			if (mute && (issue_thinkpad_cmos_command(cmos_cmd) ||
				     !acpi_ec_write(volume_offset, level)))
				return -EIO;

			for (i = level; i != new_level; i += inc)
				if (issue_thinkpad_cmos_command(cmos_cmd) ||
				    !acpi_ec_write(volume_offset, i + inc))
					return -EIO;

			if (mute && (issue_thinkpad_cmos_command(TP_CMOS_VOLUME_MUTE) ||
				     !acpi_ec_write(volume_offset,
						    new_level + mute)))
				return -EIO;
		}

		if (new_mute != mute) {	/* level doesn't change */
			cmos_cmd = new_mute ? TP_CMOS_VOLUME_MUTE : TP_CMOS_VOLUME_UP;

			if (issue_thinkpad_cmos_command(cmos_cmd) ||
			    !acpi_ec_write(volume_offset, level + new_mute))
				return -EIO;
		}
	}

	return 0;
}

static struct ibm_struct volume_driver_data = {
	.name = "volume",
	.read = volume_read,
	.write = volume_write,
};

/*************************************************************************
 * Fan subdriver
 */

/*
 * FAN ACCESS MODES
 *
 * TPACPI_FAN_RD_ACPI_GFAN:
 * 	ACPI GFAN method: returns fan level
 *
 * 	see TPACPI_FAN_WR_ACPI_SFAN
 * 	EC 0x2f (HFSP) not available if GFAN exists
 *
 * TPACPI_FAN_WR_ACPI_SFAN:
 * 	ACPI SFAN method: sets fan level, 0 (stop) to 7 (max)
 *
 * 	EC 0x2f (HFSP) might be available *for reading*, but do not use
 * 	it for writing.
 *
 * TPACPI_FAN_WR_TPEC:
 * 	ThinkPad EC register 0x2f (HFSP): fan control loop mode
 * 	Supported on almost all ThinkPads
 *
 * 	Fan speed changes of any sort (including those caused by the
 * 	disengaged mode) are usually done slowly by the firmware as the
 * 	maximum ammount of fan duty cycle change per second seems to be
 * 	limited.
 *
 * 	Reading is not available if GFAN exists.
 * 	Writing is not available if SFAN exists.
 *
 * 	Bits
 *	 7	automatic mode engaged;
 *  		(default operation mode of the ThinkPad)
 * 		fan level is ignored in this mode.
 *	 6	full speed mode (takes precedence over bit 7);
 *		not available on all thinkpads.  May disable
 *		the tachometer while the fan controller ramps up
 *		the speed (which can take up to a few *minutes*).
 *		Speeds up fan to 100% duty-cycle, which is far above
 *		the standard RPM levels.  It is not impossible that
 *		it could cause hardware damage.
 *	5-3	unused in some models.  Extra bits for fan level
 *		in others, but still useless as all values above
 *		7 map to the same speed as level 7 in these models.
 *	2-0	fan level (0..7 usually)
 *			0x00 = stop
 * 			0x07 = max (set when temperatures critical)
 * 		Some ThinkPads may have other levels, see
 * 		TPACPI_FAN_WR_ACPI_FANS (X31/X40/X41)
 *
 *	FIRMWARE BUG: on some models, EC 0x2f might not be initialized at
 *	boot. Apparently the EC does not intialize it, so unless ACPI DSDT
 *	does so, its initial value is meaningless (0x07).
 *
 *	For firmware bugs, refer to:
 *	http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues
 *
 * 	----
 *
 *	ThinkPad EC register 0x84 (LSB), 0x85 (MSB):
 *	Main fan tachometer reading (in RPM)
 *
 *	This register is present on all ThinkPads with a new-style EC, and
 *	it is known not to be present on the A21m/e, and T22, as there is
 *	something else in offset 0x84 according to the ACPI DSDT.  Other
 *	ThinkPads from this same time period (and earlier) probably lack the
 *	tachometer as well.
 *
 *	Unfortunately a lot of ThinkPads with new-style ECs but whose firwmare
 *	was never fixed by IBM to report the EC firmware version string
 *	probably support the tachometer (like the early X models), so
 *	detecting it is quite hard.  We need more data to know for sure.
 *
 *	FIRMWARE BUG: always read 0x84 first, otherwise incorrect readings
 *	might result.
 *
 *	FIRMWARE BUG: may go stale while the EC is switching to full speed
 *	mode.
 *
 *	For firmware bugs, refer to:
 *	http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues
 *
 * TPACPI_FAN_WR_ACPI_FANS:
 *	ThinkPad X31, X40, X41.  Not available in the X60.
 *
 *	FANS ACPI handle: takes three arguments: low speed, medium speed,
 *	high speed.  ACPI DSDT seems to map these three speeds to levels
 *	as follows: STOP LOW LOW MED MED HIGH HIGH HIGH HIGH
 *	(this map is stored on FAN0..FAN8 as "0,1,1,2,2,3,3,3,3")
 *
 * 	The speeds are stored on handles
 * 	(FANA:FAN9), (FANC:FANB), (FANE:FAND).
 *
 * 	There are three default speed sets, acessible as handles:
 * 	FS1L,FS1M,FS1H; FS2L,FS2M,FS2H; FS3L,FS3M,FS3H
 *
 * 	ACPI DSDT switches which set is in use depending on various
 * 	factors.
 *
 * 	TPACPI_FAN_WR_TPEC is also available and should be used to
 * 	command the fan.  The X31/X40/X41 seems to have 8 fan levels,
 * 	but the ACPI tables just mention level 7.
 */

static enum fan_status_access_mode fan_status_access_mode;
static enum fan_control_access_mode fan_control_access_mode;
static enum fan_control_commands fan_control_commands;

static u8 fan_control_initial_status;
static u8 fan_control_desired_level;

static void fan_watchdog_fire(struct work_struct *ignored);
static int fan_watchdog_maxinterval;
static DECLARE_DELAYED_WORK(fan_watchdog_task, fan_watchdog_fire);

IBM_HANDLE(fans, ec, "FANS");	/* X31, X40, X41 */
IBM_HANDLE(gfan, ec, "GFAN",	/* 570 */
	   "\\FSPD",		/* 600e/x, 770e, 770x */
	   );			/* all others */
IBM_HANDLE(sfan, ec, "SFAN",	/* 570 */
	   "JFNS",		/* 770x-JL */
	   );			/* all others */

/*
 * SYSFS fan layout: hwmon compatible (device)
 *
 * pwm*_enable:
 * 	0: "disengaged" mode
 * 	1: manual mode
 * 	2: native EC "auto" mode (recommended, hardware default)
 *
 * pwm*: set speed in manual mode, ignored otherwise.
 * 	0 is level 0; 255 is level 7. Intermediate points done with linear
 * 	interpolation.
 *
 * fan*_input: tachometer reading, RPM
 *
 *
 * SYSFS fan layout: extensions
 *
 * fan_watchdog (driver):
 * 	fan watchdog interval in seconds, 0 disables (default), max 120
 */

/* sysfs fan pwm1_enable ----------------------------------------------- */
static ssize_t fan_pwm1_enable_show(struct device *dev,
				    struct device_attribute *attr,
				    char *buf)
{
	int res, mode;
	u8 status;

	res = fan_get_status_safe(&status);
	if (res)
		return res;

	if (unlikely(tp_features.fan_ctrl_status_undef)) {
		if (status != fan_control_initial_status) {
			tp_features.fan_ctrl_status_undef = 0;
		} else {
			/* Return most likely status. In fact, it
			 * might be the only possible status */
			status = TP_EC_FAN_AUTO;
		}
	}

	if (status & TP_EC_FAN_FULLSPEED) {
		mode = 0;
	} else if (status & TP_EC_FAN_AUTO) {
		mode = 2;
	} else
		mode = 1;

	return snprintf(buf, PAGE_SIZE, "%d\n", mode);
}

static ssize_t fan_pwm1_enable_store(struct device *dev,
				     struct device_attribute *attr,
				     const char *buf, size_t count)
{
	unsigned long t;
	int res, level;

	if (parse_strtoul(buf, 2, &t))
		return -EINVAL;

	switch (t) {
	case 0:
		level = TP_EC_FAN_FULLSPEED;
		break;
	case 1:
		level = TPACPI_FAN_LAST_LEVEL;
		break;
	case 2:
		level = TP_EC_FAN_AUTO;
		break;
	case 3:
		/* reserved for software-controlled auto mode */
		return -ENOSYS;
	default:
		return -EINVAL;
	}

	res = fan_set_level_safe(level);
	if (res == -ENXIO)
		return -EINVAL;
	else if (res < 0)
		return res;

	fan_watchdog_reset();

	return count;
}

static struct device_attribute dev_attr_fan_pwm1_enable =
	__ATTR(pwm1_enable, S_IWUSR | S_IRUGO,
		fan_pwm1_enable_show, fan_pwm1_enable_store);

/* sysfs fan pwm1 ------------------------------------------------------ */
static ssize_t fan_pwm1_show(struct device *dev,
			     struct device_attribute *attr,
			     char *buf)
{
	int res;
	u8 status;

	res = fan_get_status_safe(&status);
	if (res)
		return res;

	if (unlikely(tp_features.fan_ctrl_status_undef)) {
		if (status != fan_control_initial_status) {
			tp_features.fan_ctrl_status_undef = 0;
		} else {
			status = TP_EC_FAN_AUTO;
		}
	}

	if ((status &
	     (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) != 0)
		status = fan_control_desired_level;

	if (status > 7)
		status = 7;

	return snprintf(buf, PAGE_SIZE, "%u\n", (status * 255) / 7);
}

static ssize_t fan_pwm1_store(struct device *dev,
			      struct device_attribute *attr,
			      const char *buf, size_t count)
{
	unsigned long s;
	int rc;
	u8 status, newlevel;

	if (parse_strtoul(buf, 255, &s))
		return -EINVAL;

	/* scale down from 0-255 to 0-7 */
	newlevel = (s >> 5) & 0x07;

	if (mutex_lock_interruptible(&fan_mutex))
		return -ERESTARTSYS;

	rc = fan_get_status(&status);
	if (!rc && (status &
		    (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) {
		rc = fan_set_level(newlevel);
		if (rc == -ENXIO)
			rc = -EINVAL;
		else if (!rc) {
			fan_update_desired_level(newlevel);
			fan_watchdog_reset();
		}
	}

	mutex_unlock(&fan_mutex);
	return (rc)? rc : count;
}

static struct device_attribute dev_attr_fan_pwm1 =
	__ATTR(pwm1, S_IWUSR | S_IRUGO,
		fan_pwm1_show, fan_pwm1_store);

/* sysfs fan fan1_input ------------------------------------------------ */
static ssize_t fan_fan1_input_show(struct device *dev,
			   struct device_attribute *attr,
			   char *buf)
{
	int res;
	unsigned int speed;

	res = fan_get_speed(&speed);
	if (res < 0)
		return res;

	return snprintf(buf, PAGE_SIZE, "%u\n", speed);
}

static struct device_attribute dev_attr_fan_fan1_input =
	__ATTR(fan1_input, S_IRUGO,
		fan_fan1_input_show, NULL);

/* sysfs fan fan_watchdog (hwmon driver) ------------------------------- */
static ssize_t fan_fan_watchdog_show(struct device_driver *drv,
				     char *buf)
{
	return snprintf(buf, PAGE_SIZE, "%u\n", fan_watchdog_maxinterval);
}

static ssize_t fan_fan_watchdog_store(struct device_driver *drv,
				      const char *buf, size_t count)
{
	unsigned long t;

	if (parse_strtoul(buf, 120, &t))
		return -EINVAL;

	if (!fan_control_allowed)
		return -EPERM;

	fan_watchdog_maxinterval = t;
	fan_watchdog_reset();

	return count;
}

static DRIVER_ATTR(fan_watchdog, S_IWUSR | S_IRUGO,
		fan_fan_watchdog_show, fan_fan_watchdog_store);

/* --------------------------------------------------------------------- */
static struct attribute *fan_attributes[] = {
	&dev_attr_fan_pwm1_enable.attr, &dev_attr_fan_pwm1.attr,
	&dev_attr_fan_fan1_input.attr,
	NULL
};

static const struct attribute_group fan_attr_group = {
	.attrs = fan_attributes,
};

static int __init fan_init(struct ibm_init_struct *iibm)
{
	int rc;

	vdbg_printk(TPACPI_DBG_INIT, "initializing fan subdriver\n");

	mutex_init(&fan_mutex);
	fan_status_access_mode = TPACPI_FAN_NONE;
	fan_control_access_mode = TPACPI_FAN_WR_NONE;
	fan_control_commands = 0;
	fan_watchdog_maxinterval = 0;
	tp_features.fan_ctrl_status_undef = 0;
	fan_control_desired_level = 7;

	IBM_ACPIHANDLE_INIT(fans);
	IBM_ACPIHANDLE_INIT(gfan);
	IBM_ACPIHANDLE_INIT(sfan);

	if (gfan_handle) {
		/* 570, 600e/x, 770e, 770x */
		fan_status_access_mode = TPACPI_FAN_RD_ACPI_GFAN;
	} else {
		/* all other ThinkPads: note that even old-style
		 * ThinkPad ECs supports the fan control register */
		if (likely(acpi_ec_read(fan_status_offset,
					&fan_control_initial_status))) {
			fan_status_access_mode = TPACPI_FAN_RD_TPEC;

			/* In some ThinkPads, neither the EC nor the ACPI
			 * DSDT initialize the fan status, and it ends up
			 * being set to 0x07 when it *could* be either
			 * 0x07 or 0x80.
			 *
			 * Enable for TP-1Y (T43), TP-78 (R51e),
			 * TP-76 (R52), TP-70 (T43, R52), which are known
			 * to be buggy. */
			if (fan_control_initial_status == 0x07) {
				switch (thinkpad_id.ec_model) {
				case 0x5931: /* TP-1Y */
				case 0x3837: /* TP-78 */
				case 0x3637: /* TP-76 */
				case 0x3037: /* TP-70 */
					printk(IBM_NOTICE
					       "fan_init: initial fan status is "
					       "unknown, assuming it is in auto "
					       "mode\n");
					tp_features.fan_ctrl_status_undef = 1;
					;;
				}
			}
		} else {
			printk(IBM_ERR
			       "ThinkPad ACPI EC access misbehaving, "
			       "fan status and control unavailable\n");
			return 1;
		}
	}

	if (sfan_handle) {
		/* 570, 770x-JL */
		fan_control_access_mode = TPACPI_FAN_WR_ACPI_SFAN;
		fan_control_commands |=
		    TPACPI_FAN_CMD_LEVEL | TPACPI_FAN_CMD_ENABLE;
	} else {
		if (!gfan_handle) {
			/* gfan without sfan means no fan control */
			/* all other models implement TP EC 0x2f control */

			if (fans_handle) {
				/* X31, X40, X41 */
				fan_control_access_mode =
				    TPACPI_FAN_WR_ACPI_FANS;
				fan_control_commands |=
				    TPACPI_FAN_CMD_SPEED |
				    TPACPI_FAN_CMD_LEVEL |
				    TPACPI_FAN_CMD_ENABLE;
			} else {
				fan_control_access_mode = TPACPI_FAN_WR_TPEC;
				fan_control_commands |=
				    TPACPI_FAN_CMD_LEVEL |
				    TPACPI_FAN_CMD_ENABLE;
			}
		}
	}

	vdbg_printk(TPACPI_DBG_INIT, "fan is %s, modes %d, %d\n",
		str_supported(fan_status_access_mode != TPACPI_FAN_NONE ||
		  fan_control_access_mode != TPACPI_FAN_WR_NONE),
		fan_status_access_mode, fan_control_access_mode);

	/* fan control master switch */
	if (!fan_control_allowed) {
		fan_control_access_mode = TPACPI_FAN_WR_NONE;
		fan_control_commands = 0;
		dbg_printk(TPACPI_DBG_INIT,
			   "fan control features disabled by parameter\n");
	}

	/* update fan_control_desired_level */
	if (fan_status_access_mode != TPACPI_FAN_NONE)
		fan_get_status_safe(NULL);

	if (fan_status_access_mode != TPACPI_FAN_NONE ||
	    fan_control_access_mode != TPACPI_FAN_WR_NONE) {
		rc = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj,
					 &fan_attr_group);
		if (!(rc < 0))
			rc = driver_create_file(&tpacpi_hwmon_pdriver.driver,
					&driver_attr_fan_watchdog);
		if (rc < 0)
			return rc;
		return 0;
	} else
		return 1;
}

/*
 * Call with fan_mutex held
 */
static void fan_update_desired_level(u8 status)
{
	if ((status &
	     (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) {
		if (status > 7)
			fan_control_desired_level = 7;
		else
			fan_control_desired_level = status;
	}
}

static int fan_get_status(u8 *status)
{
	u8 s;

	/* TODO:
	 * Add TPACPI_FAN_RD_ACPI_FANS ? */

	switch (fan_status_access_mode) {
	case TPACPI_FAN_RD_ACPI_GFAN:
		/* 570, 600e/x, 770e, 770x */

		if (unlikely(!acpi_evalf(gfan_handle, &s, NULL, "d")))
			return -EIO;

		if (likely(status))
			*status = s & 0x07;

		break;

	case TPACPI_FAN_RD_TPEC:
		/* all except 570, 600e/x, 770e, 770x */
		if (unlikely(!acpi_ec_read(fan_status_offset, &s)))
			return -EIO;

		if (likely(status))
			*status = s;

		break;

	default:
		return -ENXIO;
	}

	return 0;
}

static int fan_get_status_safe(u8 *status)
{
	int rc;
	u8 s;

	if (mutex_lock_interruptible(&fan_mutex))
		return -ERESTARTSYS;
	rc = fan_get_status(&s);
	if (!rc)
		fan_update_desired_level(s);
	mutex_unlock(&fan_mutex);

	if (status)
		*status = s;

	return rc;
}

static void fan_exit(void)
{
	vdbg_printk(TPACPI_DBG_EXIT, "cancelling any pending fan watchdog tasks\n");

	/* FIXME: can we really do this unconditionally? */
	sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj, &fan_attr_group);
	driver_remove_file(&tpacpi_hwmon_pdriver.driver, &driver_attr_fan_watchdog);

	cancel_delayed_work(&fan_watchdog_task);
	flush_scheduled_work();
}

static int fan_get_speed(unsigned int *speed)
{
	u8 hi, lo;

	switch (fan_status_access_mode) {
	case TPACPI_FAN_RD_TPEC:
		/* all except 570, 600e/x, 770e, 770x */
		if (unlikely(!acpi_ec_read(fan_rpm_offset, &lo) ||
			     !acpi_ec_read(fan_rpm_offset + 1, &hi)))
			return -EIO;

		if (likely(speed))
			*speed = (hi << 8) | lo;

		break;

	default:
		return -ENXIO;
	}

	return 0;
}

static void fan_watchdog_fire(struct work_struct *ignored)
{
	int rc;

	if (tpacpi_lifecycle != TPACPI_LIFE_RUNNING)
		return;

	printk(IBM_NOTICE "fan watchdog: enabling fan\n");
	rc = fan_set_enable();
	if (rc < 0) {
		printk(IBM_ERR "fan watchdog: error %d while enabling fan, "
			"will try again later...\n", -rc);
		/* reschedule for later */
		fan_watchdog_reset();
	}
}

static void fan_watchdog_reset(void)
{
	static int fan_watchdog_active;

	if (fan_control_access_mode == TPACPI_FAN_WR_NONE)
		return;

	if (fan_watchdog_active)
		cancel_delayed_work(&fan_watchdog_task);

	if (fan_watchdog_maxinterval > 0 &&
	    tpacpi_lifecycle != TPACPI_LIFE_EXITING) {
		fan_watchdog_active = 1;
		if (!schedule_delayed_work(&fan_watchdog_task,
				msecs_to_jiffies(fan_watchdog_maxinterval
						 * 1000))) {
			printk(IBM_ERR "failed to schedule the fan watchdog, "
			       "watchdog will not trigger\n");
		}
	} else
		fan_watchdog_active = 0;
}

static int fan_set_level(int level)
{
	if (!fan_control_allowed)
		return -EPERM;

	switch (fan_control_access_mode) {
	case TPACPI_FAN_WR_ACPI_SFAN:
		if (level >= 0 && level <= 7) {
			if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", level))
				return -EIO;
		} else
			return -EINVAL;
		break;

	case TPACPI_FAN_WR_ACPI_FANS:
	case TPACPI_FAN_WR_TPEC:
		if ((level != TP_EC_FAN_AUTO) &&
		    (level != TP_EC_FAN_FULLSPEED) &&
		    ((level < 0) || (level > 7)))
			return -EINVAL;

		/* safety net should the EC not support AUTO
		 * or FULLSPEED mode bits and just ignore them */
		if (level & TP_EC_FAN_FULLSPEED)
			level |= 7;	/* safety min speed 7 */
		else if (level & TP_EC_FAN_FULLSPEED)
			level |= 4;	/* safety min speed 4 */

		if (!acpi_ec_write(fan_status_offset, level))
			return -EIO;
		else
			tp_features.fan_ctrl_status_undef = 0;
		break;

	default:
		return -ENXIO;
	}
	return 0;
}

static int fan_set_level_safe(int level)
{
	int rc;

	if (!fan_control_allowed)
		return -EPERM;

	if (mutex_lock_interruptible(&fan_mutex))
		return -ERESTARTSYS;

	if (level == TPACPI_FAN_LAST_LEVEL)
		level = fan_control_desired_level;

	rc = fan_set_level(level);
	if (!rc)
		fan_update_desired_level(level);

	mutex_unlock(&fan_mutex);
	return rc;
}

static int fan_set_enable(void)
{
	u8 s;
	int rc;

	if (!fan_control_allowed)
		return -EPERM;

	if (mutex_lock_interruptible(&fan_mutex))
		return -ERESTARTSYS;

	switch (fan_control_access_mode) {
	case TPACPI_FAN_WR_ACPI_FANS:
	case TPACPI_FAN_WR_TPEC:
		rc = fan_get_status(&s);
		if (rc < 0)
			break;

		/* Don't go out of emergency fan mode */
		if (s != 7) {
			s &= 0x07;
			s |= TP_EC_FAN_AUTO | 4; /* min fan speed 4 */
		}

		if (!acpi_ec_write(fan_status_offset, s))
			rc = -EIO;
		else {
			tp_features.fan_ctrl_status_undef = 0;
			rc = 0;
		}
		break;

	case TPACPI_FAN_WR_ACPI_SFAN:
		rc = fan_get_status(&s);
		if (rc < 0)
			break;

		s &= 0x07;

		/* Set fan to at least level 4 */
		s |= 4;

		if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", s))
			rc= -EIO;
		else
			rc = 0;
		break;

	default:
		rc = -ENXIO;
	}

	mutex_unlock(&fan_mutex);
	return rc;
}

static int fan_set_disable(void)
{
	int rc;

	if (!fan_control_allowed)
		return -EPERM;

	if (mutex_lock_interruptible(&fan_mutex))
		return -ERESTARTSYS;

	rc = 0;
	switch (fan_control_access_mode) {
	case TPACPI_FAN_WR_ACPI_FANS:
	case TPACPI_FAN_WR_TPEC:
		if (!acpi_ec_write(fan_status_offset, 0x00))
			rc = -EIO;
		else {
			fan_control_desired_level = 0;
			tp_features.fan_ctrl_status_undef = 0;
		}
		break;

	case TPACPI_FAN_WR_ACPI_SFAN:
		if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", 0x00))
			rc = -EIO;
		else
			fan_control_desired_level = 0;
		break;

	default:
		rc = -ENXIO;
	}


	mutex_unlock(&fan_mutex);
	return rc;
}

static int fan_set_speed(int speed)
{
	int rc;

	if (!fan_control_allowed)
		return -EPERM;

	if (mutex_lock_interruptible(&fan_mutex))
		return -ERESTARTSYS;

	rc = 0;
	switch (fan_control_access_mode) {
	case TPACPI_FAN_WR_ACPI_FANS:
		if (speed >= 0 && speed <= 65535) {
			if (!acpi_evalf(fans_handle, NULL, NULL, "vddd",
					speed, speed, speed))
				rc = -EIO;
		} else
			rc = -EINVAL;
		break;

	default:
		rc = -ENXIO;
	}

	mutex_unlock(&fan_mutex);
	return rc;
}

static int fan_read(char *p)
{
	int len = 0;
	int rc;
	u8 status;
	unsigned int speed = 0;

	switch (fan_status_access_mode) {
	case TPACPI_FAN_RD_ACPI_GFAN:
		/* 570, 600e/x, 770e, 770x */
		if ((rc = fan_get_status_safe(&status)) < 0)
			return rc;

		len += sprintf(p + len, "status:\t\t%s\n"
			       "level:\t\t%d\n",
			       (status != 0) ? "enabled" : "disabled", status);
		break;

	case TPACPI_FAN_RD_TPEC:
		/* all except 570, 600e/x, 770e, 770x */
		if ((rc = fan_get_status_safe(&status)) < 0)
			return rc;

		if (unlikely(tp_features.fan_ctrl_status_undef)) {
			if (status != fan_control_initial_status)
				tp_features.fan_ctrl_status_undef = 0;
			else
				/* Return most likely status. In fact, it
				 * might be the only possible status */
				status = TP_EC_FAN_AUTO;
		}

		len += sprintf(p + len, "status:\t\t%s\n",
			       (status != 0) ? "enabled" : "disabled");

		if ((rc = fan_get_speed(&speed)) < 0)
			return rc;

		len += sprintf(p + len, "speed:\t\t%d\n", speed);

		if (status & TP_EC_FAN_FULLSPEED)
			/* Disengaged mode takes precedence */
			len += sprintf(p + len, "level:\t\tdisengaged\n");
		else if (status & TP_EC_FAN_AUTO)
			len += sprintf(p + len, "level:\t\tauto\n");
		else
			len += sprintf(p + len, "level:\t\t%d\n", status);
		break;

	case TPACPI_FAN_NONE:
	default:
		len += sprintf(p + len, "status:\t\tnot supported\n");
	}

	if (fan_control_commands & TPACPI_FAN_CMD_LEVEL) {
		len += sprintf(p + len, "commands:\tlevel <level>");

		switch (fan_control_access_mode) {
		case TPACPI_FAN_WR_ACPI_SFAN:
			len += sprintf(p + len, " (<level> is 0-7)\n");
			break;

		default:
			len += sprintf(p + len, " (<level> is 0-7, "
				       "auto, disengaged, full-speed)\n");
			break;
		}
	}

	if (fan_control_commands & TPACPI_FAN_CMD_ENABLE)
		len += sprintf(p + len, "commands:\tenable, disable\n"
			       "commands:\twatchdog <timeout> (<timeout> is 0 (off), "
			       "1-120 (seconds))\n");

	if (fan_control_commands & TPACPI_FAN_CMD_SPEED)
		len += sprintf(p + len, "commands:\tspeed <speed>"
			       " (<speed> is 0-65535)\n");

	return len;
}

static int fan_write_cmd_level(const char *cmd, int *rc)
{
	int level;

	if (strlencmp(cmd, "level auto") == 0)
		level = TP_EC_FAN_AUTO;
	else if ((strlencmp(cmd, "level disengaged") == 0) |
	         (strlencmp(cmd, "level full-speed") == 0))
		level = TP_EC_FAN_FULLSPEED;
	else if (sscanf(cmd, "level %d", &level) != 1)
		return 0;

	if ((*rc = fan_set_level_safe(level)) == -ENXIO)
		printk(IBM_ERR "level command accepted for unsupported "
		       "access mode %d", fan_control_access_mode);

	return 1;
}

static int fan_write_cmd_enable(const char *cmd, int *rc)
{
	if (strlencmp(cmd, "enable") != 0)
		return 0;

	if ((*rc = fan_set_enable()) == -ENXIO)
		printk(IBM_ERR "enable command accepted for unsupported "
		       "access mode %d", fan_control_access_mode);

	return 1;
}

static int fan_write_cmd_disable(const char *cmd, int *rc)
{
	if (strlencmp(cmd, "disable") != 0)
		return 0;

	if ((*rc = fan_set_disable()) == -ENXIO)
		printk(IBM_ERR "disable command accepted for unsupported "
		       "access mode %d", fan_control_access_mode);

	return 1;
}

static int fan_write_cmd_speed(const char *cmd, int *rc)
{
	int speed;

	/* TODO:
	 * Support speed <low> <medium> <high> ? */

	if (sscanf(cmd, "speed %d", &speed) != 1)
		return 0;

	if ((*rc = fan_set_speed(speed)) == -ENXIO)
		printk(IBM_ERR "speed command accepted for unsupported "
		       "access mode %d", fan_control_access_mode);

	return 1;
}

static int fan_write_cmd_watchdog(const char *cmd, int *rc)
{
	int interval;

	if (sscanf(cmd, "watchdog %d", &interval) != 1)
		return 0;

	if (interval < 0 || interval > 120)
		*rc = -EINVAL;
	else
		fan_watchdog_maxinterval = interval;

	return 1;
}

static int fan_write(char *buf)
{
	char *cmd;
	int rc = 0;

	while (!rc && (cmd = next_cmd(&buf))) {
		if (!((fan_control_commands & TPACPI_FAN_CMD_LEVEL) &&
		      fan_write_cmd_level(cmd, &rc)) &&
		    !((fan_control_commands & TPACPI_FAN_CMD_ENABLE) &&
		      (fan_write_cmd_enable(cmd, &rc) ||
		       fan_write_cmd_disable(cmd, &rc) ||
		       fan_write_cmd_watchdog(cmd, &rc))) &&
		    !((fan_control_commands & TPACPI_FAN_CMD_SPEED) &&
		      fan_write_cmd_speed(cmd, &rc))
		    )
			rc = -EINVAL;
		else if (!rc)
			fan_watchdog_reset();
	}

	return rc;
}

static struct ibm_struct fan_driver_data = {
	.name = "fan",
	.read = fan_read,
	.write = fan_write,
	.exit = fan_exit,
};

/****************************************************************************
 ****************************************************************************
 *
 * Infrastructure
 *
 ****************************************************************************
 ****************************************************************************/

/* sysfs name ---------------------------------------------------------- */
static ssize_t thinkpad_acpi_pdev_name_show(struct device *dev,
			   struct device_attribute *attr,
			   char *buf)
{
	return snprintf(buf, PAGE_SIZE, "%s\n", IBM_NAME);
}

static struct device_attribute dev_attr_thinkpad_acpi_pdev_name =
	__ATTR(name, S_IRUGO, thinkpad_acpi_pdev_name_show, NULL);

/* --------------------------------------------------------------------- */

/* /proc support */
static struct proc_dir_entry *proc_dir;

/* Subdriver registry */
static LIST_HEAD(tpacpi_all_drivers);


/*
 * Module and infrastructure proble, init and exit handling
 */

#ifdef CONFIG_THINKPAD_ACPI_DEBUG
static const char * __init str_supported(int is_supported)
{
	static char text_unsupported[] __initdata = "not supported";

	return (is_supported)? &text_unsupported[4] : &text_unsupported[0];
}
#endif /* CONFIG_THINKPAD_ACPI_DEBUG */

static int __init ibm_init(struct ibm_init_struct *iibm)
{
	int ret;
	struct ibm_struct *ibm = iibm->data;
	struct proc_dir_entry *entry;

	BUG_ON(ibm == NULL);

	INIT_LIST_HEAD(&ibm->all_drivers);

	if (ibm->flags.experimental && !experimental)
		return 0;

	dbg_printk(TPACPI_DBG_INIT,
		"probing for %s\n", ibm->name);

	if (iibm->init) {
		ret = iibm->init(iibm);
		if (ret > 0)
			return 0;	/* probe failed */
		if (ret)
			return ret;

		ibm->flags.init_called = 1;
	}

	if (ibm->acpi) {
		if (ibm->acpi->hid) {
			ret = register_tpacpi_subdriver(ibm);
			if (ret)
				goto err_out;
		}

		if (ibm->acpi->notify) {
			ret = setup_acpi_notify(ibm);
			if (ret == -ENODEV) {
				printk(IBM_NOTICE "disabling subdriver %s\n",
					ibm->name);
				ret = 0;
				goto err_out;
			}
			if (ret < 0)
				goto err_out;
		}
	}

	dbg_printk(TPACPI_DBG_INIT,
		"%s installed\n", ibm->name);

	if (ibm->read) {
		entry = create_proc_entry(ibm->name,
					  S_IFREG | S_IRUGO | S_IWUSR,
					  proc_dir);
		if (!entry) {
			printk(IBM_ERR "unable to create proc entry %s\n",
			       ibm->name);
			ret = -ENODEV;
			goto err_out;
		}
		entry->owner = THIS_MODULE;
		entry->data = ibm;
		entry->read_proc = &dispatch_procfs_read;
		if (ibm->write)
			entry->write_proc = &dispatch_procfs_write;
		ibm->flags.proc_created = 1;
	}

	list_add_tail(&ibm->all_drivers, &tpacpi_all_drivers);

	return 0;

err_out:
	dbg_printk(TPACPI_DBG_INIT,
		"%s: at error exit path with result %d\n",
		ibm->name, ret);

	ibm_exit(ibm);
	return (ret < 0)? ret : 0;
}

static void ibm_exit(struct ibm_struct *ibm)
{
	dbg_printk(TPACPI_DBG_EXIT, "removing %s\n", ibm->name);

	list_del_init(&ibm->all_drivers);

	if (ibm->flags.acpi_notify_installed) {
		dbg_printk(TPACPI_DBG_EXIT,
			"%s: acpi_remove_notify_handler\n", ibm->name);
		BUG_ON(!ibm->acpi);
		acpi_remove_notify_handler(*ibm->acpi->handle,
					   ibm->acpi->type,
					   dispatch_acpi_notify);
		ibm->flags.acpi_notify_installed = 0;
		ibm->flags.acpi_notify_installed = 0;
	}

	if (ibm->flags.proc_created) {
		dbg_printk(TPACPI_DBG_EXIT,
			"%s: remove_proc_entry\n", ibm->name);
		remove_proc_entry(ibm->name, proc_dir);
		ibm->flags.proc_created = 0;
	}

	if (ibm->flags.acpi_driver_registered) {
		dbg_printk(TPACPI_DBG_EXIT,
			"%s: acpi_bus_unregister_driver\n", ibm->name);
		BUG_ON(!ibm->acpi);
		acpi_bus_unregister_driver(ibm->acpi->driver);
		kfree(ibm->acpi->driver);
		ibm->acpi->driver = NULL;
		ibm->flags.acpi_driver_registered = 0;
	}

	if (ibm->flags.init_called && ibm->exit) {
		ibm->exit();
		ibm->flags.init_called = 0;
	}

	dbg_printk(TPACPI_DBG_INIT, "finished removing %s\n", ibm->name);
}

/* Probing */

static void __init get_thinkpad_model_data(struct thinkpad_id_data *tp)
{
	const struct dmi_device *dev = NULL;
	char ec_fw_string[18];

	if (!tp)
		return;

	memset(tp, 0, sizeof(*tp));

	if (dmi_name_in_vendors("IBM"))
		tp->vendor = PCI_VENDOR_ID_IBM;
	else if (dmi_name_in_vendors("LENOVO"))
		tp->vendor = PCI_VENDOR_ID_LENOVO;
	else
		return;

	tp->bios_version_str = kstrdup(dmi_get_system_info(DMI_BIOS_VERSION),
					GFP_KERNEL);
	if (!tp->bios_version_str)
		return;
	tp->bios_model = tp->bios_version_str[0]
			 | (tp->bios_version_str[1] << 8);

	/*
	 * ThinkPad T23 or newer, A31 or newer, R50e or newer,
	 * X32 or newer, all Z series;  Some models must have an
	 * up-to-date BIOS or they will not be detected.
	 *
	 * See http://thinkwiki.org/wiki/List_of_DMI_IDs
	 */
	while ((dev = dmi_find_device(DMI_DEV_TYPE_OEM_STRING, NULL, dev))) {
		if (sscanf(dev->name,
			   "IBM ThinkPad Embedded Controller -[%17c",
			   ec_fw_string) == 1) {
			ec_fw_string[sizeof(ec_fw_string) - 1] = 0;
			ec_fw_string[strcspn(ec_fw_string, " ]")] = 0;

			tp->ec_version_str = kstrdup(ec_fw_string, GFP_KERNEL);
			tp->ec_model = ec_fw_string[0]
					| (ec_fw_string[1] << 8);
			break;
		}
	}

	tp->model_str = kstrdup(dmi_get_system_info(DMI_PRODUCT_VERSION),
					GFP_KERNEL);
	if (strnicmp(tp->model_str, "ThinkPad", 8) != 0) {
		kfree(tp->model_str);
		tp->model_str = NULL;
	}
}

static int __init probe_for_thinkpad(void)
{
	int is_thinkpad;

	if (acpi_disabled)
		return -ENODEV;

	/*
	 * Non-ancient models have better DMI tagging, but very old models
	 * don't.
	 */
	is_thinkpad = (thinkpad_id.model_str != NULL);

	/* ec is required because many other handles are relative to it */
	IBM_ACPIHANDLE_INIT(ec);
	if (!ec_handle) {
		if (is_thinkpad)
			printk(IBM_ERR
				"Not yet supported ThinkPad detected!\n");
		return -ENODEV;
	}

	/*
	 * Risks a regression on very old machines, but reduces potential
	 * false positives a damn great deal
	 */
	if (!is_thinkpad)
		is_thinkpad = (thinkpad_id.vendor == PCI_VENDOR_ID_IBM);

	if (!is_thinkpad && !force_load)
		return -ENODEV;

	return 0;
}


/* Module init, exit, parameters */

static struct ibm_init_struct ibms_init[] __initdata = {
	{
		.init = thinkpad_acpi_driver_init,
		.data = &thinkpad_acpi_driver_data,
	},
	{
		.init = hotkey_init,
		.data = &hotkey_driver_data,
	},
	{
		.init = bluetooth_init,
		.data = &bluetooth_driver_data,
	},
	{
		.init = wan_init,
		.data = &wan_driver_data,
	},
	{
		.init = video_init,
		.data = &video_driver_data,
	},
	{
		.init = light_init,
		.data = &light_driver_data,
	},
#ifdef CONFIG_THINKPAD_ACPI_DOCK
	{
		.init = dock_init,
		.data = &dock_driver_data[0],
	},
	{
		.init = dock_init2,
		.data = &dock_driver_data[1],
	},
#endif
#ifdef CONFIG_THINKPAD_ACPI_BAY
	{
		.init = bay_init,
		.data = &bay_driver_data,
	},
#endif
	{
		.init = cmos_init,
		.data = &cmos_driver_data,
	},
	{
		.init = led_init,
		.data = &led_driver_data,
	},
	{
		.init = beep_init,
		.data = &beep_driver_data,
	},
	{
		.init = thermal_init,
		.data = &thermal_driver_data,
	},
	{
		.data = &ecdump_driver_data,
	},
	{
		.init = brightness_init,
		.data = &brightness_driver_data,
	},
	{
		.data = &volume_driver_data,
	},
	{
		.init = fan_init,
		.data = &fan_driver_data,
	},
};

static int __init set_ibm_param(const char *val, struct kernel_param *kp)
{
	unsigned int i;
	struct ibm_struct *ibm;

	if (!kp || !kp->name || !val)
		return -EINVAL;

	for (i = 0; i < ARRAY_SIZE(ibms_init); i++) {
		ibm = ibms_init[i].data;
		WARN_ON(ibm == NULL);

		if (!ibm || !ibm->name)
			continue;

		if (strcmp(ibm->name, kp->name) == 0 && ibm->write) {
			if (strlen(val) > sizeof(ibms_init[i].param) - 2)
				return -ENOSPC;
			strcpy(ibms_init[i].param, val);
			strcat(ibms_init[i].param, ",");
			return 0;
		}
	}

	return -EINVAL;
}

static int experimental;
module_param(experimental, int, 0);

static u32 dbg_level;
module_param_named(debug, dbg_level, uint, 0);

static int force_load;
module_param(force_load, bool, 0);

static int fan_control_allowed;
module_param_named(fan_control, fan_control_allowed, bool, 0);

static int brightness_mode;
module_param_named(brightness_mode, brightness_mode, int, 0);

static unsigned int brightness_enable = 2; /* 2 = auto, 0 = no, 1 = yes */
module_param(brightness_enable, uint, 0);

static unsigned int hotkey_report_mode;
module_param(hotkey_report_mode, uint, 0);

#define IBM_PARAM(feature) \
	module_param_call(feature, set_ibm_param, NULL, NULL, 0)

IBM_PARAM(hotkey);
IBM_PARAM(bluetooth);
IBM_PARAM(video);
IBM_PARAM(light);
#ifdef CONFIG_THINKPAD_ACPI_DOCK
IBM_PARAM(dock);
#endif
#ifdef CONFIG_THINKPAD_ACPI_BAY
IBM_PARAM(bay);
#endif /* CONFIG_THINKPAD_ACPI_BAY */
IBM_PARAM(cmos);
IBM_PARAM(led);
IBM_PARAM(beep);
IBM_PARAM(ecdump);
IBM_PARAM(brightness);
IBM_PARAM(volume);
IBM_PARAM(fan);

static int __init thinkpad_acpi_module_init(void)
{
	int ret, i;

	tpacpi_lifecycle = TPACPI_LIFE_INIT;

	/* Parameter checking */
	if (hotkey_report_mode > 2)
		return -EINVAL;

	/* Driver-level probe */

	get_thinkpad_model_data(&thinkpad_id);
	ret = probe_for_thinkpad();
	if (ret) {
		thinkpad_acpi_module_exit();
		return ret;
	}

	/* Driver initialization */

	IBM_ACPIHANDLE_INIT(ecrd);
	IBM_ACPIHANDLE_INIT(ecwr);

	proc_dir = proc_mkdir(IBM_PROC_DIR, acpi_root_dir);
	if (!proc_dir) {
		printk(IBM_ERR "unable to create proc dir " IBM_PROC_DIR);
		thinkpad_acpi_module_exit();
		return -ENODEV;
	}
	proc_dir->owner = THIS_MODULE;

	ret = platform_driver_register(&tpacpi_pdriver);
	if (ret) {
		printk(IBM_ERR "unable to register main platform driver\n");
		thinkpad_acpi_module_exit();
		return ret;
	}
	tp_features.platform_drv_registered = 1;

	ret = platform_driver_register(&tpacpi_hwmon_pdriver);
	if (ret) {
		printk(IBM_ERR "unable to register hwmon platform driver\n");
		thinkpad_acpi_module_exit();
		return ret;
	}
	tp_features.sensors_pdrv_registered = 1;

	ret = tpacpi_create_driver_attributes(&tpacpi_pdriver.driver);
	if (!ret) {
		tp_features.platform_drv_attrs_registered = 1;
		ret = tpacpi_create_driver_attributes(&tpacpi_hwmon_pdriver.driver);
	}
	if (ret) {
		printk(IBM_ERR "unable to create sysfs driver attributes\n");
		thinkpad_acpi_module_exit();
		return ret;
	}
	tp_features.sensors_pdrv_attrs_registered = 1;


	/* Device initialization */
	tpacpi_pdev = platform_device_register_simple(IBM_DRVR_NAME, -1,
							NULL, 0);
	if (IS_ERR(tpacpi_pdev)) {
		ret = PTR_ERR(tpacpi_pdev);
		tpacpi_pdev = NULL;
		printk(IBM_ERR "unable to register platform device\n");
		thinkpad_acpi_module_exit();
		return ret;
	}
	tpacpi_sensors_pdev = platform_device_register_simple(
							IBM_HWMON_DRVR_NAME,
							-1, NULL, 0);
	if (IS_ERR(tpacpi_sensors_pdev)) {
		ret = PTR_ERR(tpacpi_sensors_pdev);
		tpacpi_sensors_pdev = NULL;
		printk(IBM_ERR "unable to register hwmon platform device\n");
		thinkpad_acpi_module_exit();
		return ret;
	}
	ret = device_create_file(&tpacpi_sensors_pdev->dev,
				 &dev_attr_thinkpad_acpi_pdev_name);
	if (ret) {
		printk(IBM_ERR
			"unable to create sysfs hwmon device attributes\n");
		thinkpad_acpi_module_exit();
		return ret;
	}
	tp_features.sensors_pdev_attrs_registered = 1;
	tpacpi_hwmon = hwmon_device_register(&tpacpi_sensors_pdev->dev);
	if (IS_ERR(tpacpi_hwmon)) {
		ret = PTR_ERR(tpacpi_hwmon);
		tpacpi_hwmon = NULL;
		printk(IBM_ERR "unable to register hwmon device\n");
		thinkpad_acpi_module_exit();
		return ret;
	}
	mutex_init(&tpacpi_inputdev_send_mutex);
	tpacpi_inputdev = input_allocate_device();
	if (!tpacpi_inputdev) {
		printk(IBM_ERR "unable to allocate input device\n");
		thinkpad_acpi_module_exit();
		return -ENOMEM;
	} else {
		/* Prepare input device, but don't register */
		tpacpi_inputdev->name = "ThinkPad Extra Buttons";
		tpacpi_inputdev->phys = IBM_DRVR_NAME "/input0";
		tpacpi_inputdev->id.bustype = BUS_HOST;
		tpacpi_inputdev->id.vendor = (thinkpad_id.vendor) ?
						thinkpad_id.vendor :
						PCI_VENDOR_ID_IBM;
		tpacpi_inputdev->id.product = TPACPI_HKEY_INPUT_PRODUCT;
		tpacpi_inputdev->id.version = TPACPI_HKEY_INPUT_VERSION;
	}
	for (i = 0; i < ARRAY_SIZE(ibms_init); i++) {
		ret = ibm_init(&ibms_init[i]);
		if (ret >= 0 && *ibms_init[i].param)
			ret = ibms_init[i].data->write(ibms_init[i].param);
		if (ret < 0) {
			thinkpad_acpi_module_exit();
			return ret;
		}
	}
	ret = input_register_device(tpacpi_inputdev);
	if (ret < 0) {
		printk(IBM_ERR "unable to register input device\n");
		thinkpad_acpi_module_exit();
		return ret;
	} else {
		tp_features.input_device_registered = 1;
	}

	tpacpi_lifecycle = TPACPI_LIFE_RUNNING;
	return 0;
}

static void thinkpad_acpi_module_exit(void)
{
	struct ibm_struct *ibm, *itmp;

	tpacpi_lifecycle = TPACPI_LIFE_EXITING;

	list_for_each_entry_safe_reverse(ibm, itmp,
					 &tpacpi_all_drivers,
					 all_drivers) {
		ibm_exit(ibm);
	}

	dbg_printk(TPACPI_DBG_INIT, "finished subdriver exit path...\n");

	if (tpacpi_inputdev) {
		if (tp_features.input_device_registered)
			input_unregister_device(tpacpi_inputdev);
		else
			input_free_device(tpacpi_inputdev);
	}

	if (tpacpi_hwmon)
		hwmon_device_unregister(tpacpi_hwmon);

	if (tp_features.sensors_pdev_attrs_registered)
		device_remove_file(&tpacpi_sensors_pdev->dev,
				   &dev_attr_thinkpad_acpi_pdev_name);
	if (tpacpi_sensors_pdev)
		platform_device_unregister(tpacpi_sensors_pdev);
	if (tpacpi_pdev)
		platform_device_unregister(tpacpi_pdev);

	if (tp_features.sensors_pdrv_attrs_registered)
		tpacpi_remove_driver_attributes(&tpacpi_hwmon_pdriver.driver);
	if (tp_features.platform_drv_attrs_registered)
		tpacpi_remove_driver_attributes(&tpacpi_pdriver.driver);

	if (tp_features.sensors_pdrv_registered)
		platform_driver_unregister(&tpacpi_hwmon_pdriver);

	if (tp_features.platform_drv_registered)
		platform_driver_unregister(&tpacpi_pdriver);

	if (proc_dir)
		remove_proc_entry(IBM_PROC_DIR, acpi_root_dir);

	kfree(thinkpad_id.bios_version_str);
	kfree(thinkpad_id.ec_version_str);
	kfree(thinkpad_id.model_str);
}

module_init(thinkpad_acpi_module_init);
module_exit(thinkpad_acpi_module_exit);