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	16 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
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generated by cgit v1.2.2 (git 2.25.0) at 2025-09-10 01:52:39 -0400

/******************************************************************************
 *
 * Driver for Option High Speed Mobile Devices.
 *
 *  Copyright (C) 2008 Option International
 *                     Filip Aben <f.aben@option.com>
 *                     Denis Joseph Barrow <d.barow@option.com>
 *                     Jan Dumon <j.dumon@option.com>
 *  Copyright (C) 2007 Andrew Bird (Sphere Systems Ltd)
 *  			<ajb@spheresystems.co.uk>
 *  Copyright (C) 2008 Greg Kroah-Hartman <gregkh@suse.de>
 *  Copyright (C) 2008 Novell, Inc.
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License version 2 as
 *  published by the Free Software Foundation.
 *
 *  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
 *
 *
 *****************************************************************************/

/******************************************************************************
 *
 * Description of the device:
 *
 * Interface 0:	Contains the IP network interface on the bulk end points.
 *		The multiplexed serial ports are using the interrupt and
 *		control endpoints.
 *		Interrupt contains a bitmap telling which multiplexed
 *		serialport needs servicing.
 *
 * Interface 1:	Diagnostics port, uses bulk only, do not submit urbs until the
 *		port is opened, as this have a huge impact on the network port
 *		throughput.
 *
 * Interface 2:	Standard modem interface - circuit switched interface, this
 *		can be used to make a standard ppp connection however it
 *              should not be used in conjunction with the IP network interface
 *              enabled for USB performance reasons i.e. if using this set
 *              ideally disable_net=1.
 *
 *****************************************************************************/

#include <linux/sched.h>
#include <linux/slab.h>
#include <linux/init.h>
#include <linux/delay.h>
#include <linux/netdevice.h>
#include <linux/module.h>
#include <linux/ethtool.h>
#include <linux/usb.h>
#include <linux/timer.h>
#include <linux/tty.h>
#include <linux/tty_driver.h>
#include <linux/tty_flip.h>
#include <linux/kmod.h>
#include <linux/rfkill.h>
#include <linux/ip.h>
#include <linux/uaccess.h>
#include <linux/usb/cdc.h>
#include <net/arp.h>
#include <asm/byteorder.h>
#include <linux/serial_core.h>
#include <linux/serial.h>


#define MOD_AUTHOR			"Option Wireless"
#define MOD_DESCRIPTION			"USB High Speed Option driver"
#define MOD_LICENSE			"GPL"

#define HSO_MAX_NET_DEVICES		10
#define HSO__MAX_MTU			2048
#define DEFAULT_MTU			1500
#define DEFAULT_MRU			1500

#define CTRL_URB_RX_SIZE		1024
#define CTRL_URB_TX_SIZE		64

#define BULK_URB_RX_SIZE		4096
#define BULK_URB_TX_SIZE		8192

#define MUX_BULK_RX_BUF_SIZE		HSO__MAX_MTU
#define MUX_BULK_TX_BUF_SIZE		HSO__MAX_MTU
#define MUX_BULK_RX_BUF_COUNT		4
#define USB_TYPE_OPTION_VENDOR		0x20

/* These definitions are used with the struct hso_net flags element */
/* - use *_bit operations on it. (bit indices not values.) */
#define HSO_NET_RUNNING			0

#define	HSO_NET_TX_TIMEOUT		(HZ*10)

#define HSO_SERIAL_MAGIC		0x48534f31

/* Number of ttys to handle */
#define HSO_SERIAL_TTY_MINORS		256

#define MAX_RX_URBS			2

static inline struct hso_serial *get_serial_by_tty(struct tty_struct *tty)
{
	if (tty)
		return tty->driver_data;
	return NULL;
}

/*****************************************************************************/
/* Debugging functions                                                       */
/*****************************************************************************/
#define D__(lvl_, fmt, arg...)				\
	do {						\
		printk(lvl_ "[%d:%s]: " fmt "\n",	\
		       __LINE__, __func__, ## arg);	\
	} while (0)

#define D_(lvl, args...)				\
	do {						\
		if (lvl & debug)			\
			D__(KERN_INFO, args);		\
	} while (0)

#define D1(args...)	D_(0x01, ##args)
#define D2(args...)	D_(0x02, ##args)
#define D3(args...)	D_(0x04, ##args)
#define D4(args...)	D_(0x08, ##args)
#define D5(args...)	D_(0x10, ##args)

/*****************************************************************************/
/* Enumerators                                                               */
/*****************************************************************************/
enum pkt_parse_state {
	WAIT_IP,
	WAIT_DATA,
	WAIT_SYNC
};

/*****************************************************************************/
/* Structs                                                                   */
/*****************************************************************************/

struct hso_shared_int {
	struct usb_endpoint_descriptor *intr_endp;
	void *shared_intr_buf;
	struct urb *shared_intr_urb;
	struct usb_device *usb;
	int use_count;
	int ref_count;
	struct mutex shared_int_lock;
};

struct hso_net {
	struct hso_device *parent;
	struct net_device *net;
	struct rfkill *rfkill;

	struct usb_endpoint_descriptor *in_endp;
	struct usb_endpoint_descriptor *out_endp;

	struct urb *mux_bulk_rx_urb_pool[MUX_BULK_RX_BUF_COUNT];
	struct urb *mux_bulk_tx_urb;
	void *mux_bulk_rx_buf_pool[MUX_BULK_RX_BUF_COUNT];
	void *mux_bulk_tx_buf;

	struct sk_buff *skb_rx_buf;
	struct sk_buff *skb_tx_buf;

	enum pkt_parse_state rx_parse_state;
	spinlock_t net_lock;

	unsigned short rx_buf_size;
	unsigned short rx_buf_missing;
	struct iphdr rx_ip_hdr;

	unsigned long flags;
};

enum rx_ctrl_state{
	RX_IDLE,
	RX_SENT,
	RX_PENDING
};

#define BM_REQUEST_TYPE (0xa1)
#define B_NOTIFICATION  (0x20)
#define W_VALUE         (0x0)
#define W_INDEX         (0x2)
#define W_LENGTH        (0x2)

#define B_OVERRUN       (0x1<<6)
#define B_PARITY        (0x1<<5)
#define B_FRAMING       (0x1<<4)
#define B_RING_SIGNAL   (0x1<<3)
#define B_BREAK         (0x1<<2)
#define B_TX_CARRIER    (0x1<<1)
#define B_RX_CARRIER    (0x1<<0)

struct hso_serial_state_notification {
	u8 bmRequestType;
	u8 bNotification;
	u16 wValue;
	u16 wIndex;
	u16 wLength;
	u16 UART_state_bitmap;
} __packed;

struct hso_tiocmget {
	struct mutex mutex;
	wait_queue_head_t waitq;
	int    intr_completed;
	struct usb_endpoint_descriptor *endp;
	struct urb *urb;
	struct hso_serial_state_notification serial_state_notification;
	u16    prev_UART_state_bitmap;
	struct uart_icount icount;
};


struct hso_serial {
	struct hso_device *parent;
	int magic;
	u8 minor;

	struct hso_shared_int *shared_int;

	/* rx/tx urb could be either a bulk urb or a control urb depending
	   on which serial port it is used on. */
	struct urb *rx_urb[MAX_RX_URBS];
	u8 num_rx_urbs;
	u8 *rx_data[MAX_RX_URBS];
	u16 rx_data_length;	/* should contain allocated length */

	struct urb *tx_urb;
	u8 *tx_data;
	u8 *tx_buffer;
	u16 tx_data_length;	/* should contain allocated length */
	u16 tx_data_count;
	u16 tx_buffer_count;
	struct usb_ctrlrequest ctrl_req_tx;
	struct usb_ctrlrequest ctrl_req_rx;

	struct usb_endpoint_descriptor *in_endp;
	struct usb_endpoint_descriptor *out_endp;

	enum rx_ctrl_state rx_state;
	u8 rts_state;
	u8 dtr_state;
	unsigned tx_urb_used:1;

	/* from usb_serial_port */
	struct tty_struct *tty;
	int open_count;
	spinlock_t serial_lock;

	int (*write_data) (struct hso_serial *serial);
	struct hso_tiocmget  *tiocmget;
	/* Hacks required to get flow control
	 * working on the serial receive buffers
	 * so as not to drop characters on the floor.
	 */
	int  curr_rx_urb_idx;
	u16  curr_rx_urb_offset;
	u8   rx_urb_filled[MAX_RX_URBS];
	struct tasklet_struct unthrottle_tasklet;
	struct work_struct    retry_unthrottle_workqueue;
};

struct hso_device {
	union {
		struct hso_serial *dev_serial;
		struct hso_net *dev_net;
	} port_data;

	u32 port_spec;

	u8 is_active;
	u8 usb_gone;
	struct work_struct async_get_intf;
	struct work_struct async_put_intf;
	struct work_struct reset_device;

	struct usb_device *usb;
	struct usb_interface *interface;

	struct device *dev;
	struct kref ref;
	struct mutex mutex;
};

/* Type of interface */
#define HSO_INTF_MASK		0xFF00
#define	HSO_INTF_MUX		0x0100
#define	HSO_INTF_BULK   	0x0200

/* Type of port */
#define HSO_PORT_MASK		0xFF
#define HSO_PORT_NO_PORT	0x0
#define	HSO_PORT_CONTROL	0x1
#define	HSO_PORT_APP		0x2
#define	HSO_PORT_GPS		0x3
#define	HSO_PORT_PCSC		0x4
#define	HSO_PORT_APP2		0x5
#define HSO_PORT_GPS_CONTROL	0x6
#define HSO_PORT_MSD		0x7
#define HSO_PORT_VOICE		0x8
#define HSO_PORT_DIAG2		0x9
#define	HSO_PORT_DIAG		0x10
#define	HSO_PORT_MODEM		0x11
#define	HSO_PORT_NETWORK	0x12

/* Additional device info */
#define HSO_INFO_MASK		0xFF000000
#define HSO_INFO_CRC_BUG	0x01000000

/*****************************************************************************/
/* Prototypes                                                                */
/*****************************************************************************/
/* Serial driver functions */
static int hso_serial_tiocmset(struct tty_struct *tty,
			       unsigned int set, unsigned int clear);
static void ctrl_callback(struct urb *urb);
static int put_rxbuf_data(struct urb *urb, struct hso_serial *serial);
static void hso_kick_transmit(struct hso_serial *serial);
/* Helper functions */
static int hso_mux_submit_intr_urb(struct hso_shared_int *mux_int,
				   struct usb_device *usb, gfp_t gfp);
static void handle_usb_error(int status, const char *function,
			     struct hso_device *hso_dev);
static struct usb_endpoint_descriptor *hso_get_ep(struct usb_interface *intf,
						  int type, int dir);
static int hso_get_mux_ports(struct usb_interface *intf, unsigned char *ports);
static void hso_free_interface(struct usb_interface *intf);
static int hso_start_serial_device(struct hso_device *hso_dev, gfp_t flags);
static int hso_stop_serial_device(struct hso_device *hso_dev);
static int hso_start_net_device(struct hso_device *hso_dev);
static void hso_free_shared_int(struct hso_shared_int *shared_int);
static int hso_stop_net_device(struct hso_device *hso_dev);
static void hso_serial_ref_free(struct kref *ref);
static void hso_std_serial_read_bulk_callback(struct urb *urb);
static int hso_mux_serial_read(struct hso_serial *serial);
static void async_get_intf(struct work_struct *data);
static void async_put_intf(struct work_struct *data);
static int hso_put_activity(struct hso_device *hso_dev);
static int hso_get_activity(struct hso_device *hso_dev);
static void tiocmget_intr_callback(struct urb *urb);
static void reset_device(struct work_struct *data);
/*****************************************************************************/
/* Helping functions                                                         */
/*****************************************************************************/

/* #define DEBUG */

static inline struct hso_net *dev2net(struct hso_device *hso_dev)
{
	return hso_dev->port_data.dev_net;
}

static inline struct hso_serial *dev2ser(struct hso_device *hso_dev)
{
	return hso_dev->port_data.dev_serial;
}

/* Debugging functions */
#ifdef DEBUG
static void dbg_dump(int line_count, const char *func_name, unsigned char *buf,
		     unsigned int len)
{
	static char name[255];

	sprintf(name, "hso[%d:%s]", line_count, func_name);
	print_hex_dump_bytes(name, DUMP_PREFIX_NONE, buf, len);
}

#define DUMP(buf_, len_)	\
	dbg_dump(__LINE__, __func__, (unsigned char *)buf_, len_)

#define DUMP1(buf_, len_)			\
	do {					\
		if (0x01 & debug)		\
			DUMP(buf_, len_);	\
	} while (0)
#else
#define DUMP(buf_, len_)
#define DUMP1(buf_, len_)
#endif

/* module parameters */
static int debug;
static int tty_major;
static int disable_net;

/* driver info */
static const char driver_name[] = "hso";
static const char tty_filename[] = "ttyHS";
static const char *version = __FILE__ ": " MOD_AUTHOR;
/* the usb driver itself (registered in hso_init) */
static struct usb_driver hso_driver;
/* serial structures */
static struct tty_driver *tty_drv;
static struct hso_device *serial_table[HSO_SERIAL_TTY_MINORS];
static struct hso_device *network_table[HSO_MAX_NET_DEVICES];
static spinlock_t serial_table_lock;

static const s32 default_port_spec[] = {
	HSO_INTF_MUX | HSO_PORT_NETWORK,
	HSO_INTF_BULK | HSO_PORT_DIAG,
	HSO_INTF_BULK | HSO_PORT_MODEM,
	0
};

static const s32 icon321_port_spec[] = {
	HSO_INTF_MUX | HSO_PORT_NETWORK,
	HSO_INTF_BULK | HSO_PORT_DIAG2,
	HSO_INTF_BULK | HSO_PORT_MODEM,
	HSO_INTF_BULK | HSO_PORT_DIAG,
	0
};

#define default_port_device(vendor, product)	\
	USB_DEVICE(vendor, product),	\
		.driver_info = (kernel_ulong_t)default_port_spec

#define icon321_port_device(vendor, product)	\
	USB_DEVICE(vendor, product),	\
		.driver_info = (kernel_ulong_t)icon321_port_spec

/* list of devices we support */
static const struct usb_device_id hso_ids[] = {
	{default_port_device(0x0af0, 0x6711)},
	{default_port_device(0x0af0, 0x6731)},
	{default_port_device(0x0af0, 0x6751)},
	{default_port_device(0x0af0, 0x6771)},
	{default_port_device(0x0af0, 0x6791)},
	{default_port_device(0x0af0, 0x6811)},
	{default_port_device(0x0af0, 0x6911)},
	{default_port_device(0x0af0, 0x6951)},
	{default_port_device(0x0af0, 0x6971)},
	{default_port_device(0x0af0, 0x7011)},
	{default_port_device(0x0af0, 0x7031)},
	{default_port_device(0x0af0, 0x7051)},
	{default_port_device(0x0af0, 0x7071)},
	{default_port_device(0x0af0, 0x7111)},
	{default_port_device(0x0af0, 0x7211)},
	{default_port_device(0x0af0, 0x7251)},
	{default_port_device(0x0af0, 0x7271)},
	{default_port_device(0x0af0, 0x7311)},
	{default_port_device(0x0af0, 0xc031)},	/* Icon-Edge */
	{icon321_port_device(0x0af0, 0xd013)},	/* Module HSxPA */
	{icon321_port_device(0x0af0, 0xd031)},	/* Icon-321 */
	{icon321_port_device(0x0af0, 0xd033)},	/* Icon-322 */
	{USB_DEVICE(0x0af0, 0x7301)},		/* GE40x */
	{USB_DEVICE(0x0af0, 0x7361)},		/* GE40x */
	{USB_DEVICE(0x0af0, 0x7381)},		/* GE40x */
	{USB_DEVICE(0x0af0, 0x7401)},		/* GI 0401 */
	{USB_DEVICE(0x0af0, 0x7501)},		/* GTM 382 */
	{USB_DEVICE(0x0af0, 0x7601)},		/* GE40x */
	{USB_DEVICE(0x0af0, 0x7701)},
	{USB_DEVICE(0x0af0, 0x7706)},
	{USB_DEVICE(0x0af0, 0x7801)},
	{USB_DEVICE(0x0af0, 0x7901)},
	{USB_DEVICE(0x0af0, 0x7A01)},
	{USB_DEVICE(0x0af0, 0x7A05)},
	{USB_DEVICE(0x0af0, 0x8200)},
	{USB_DEVICE(0x0af0, 0x8201)},
	{USB_DEVICE(0x0af0, 0x8300)},
	{USB_DEVICE(0x0af0, 0x8302)},
	{USB_DEVICE(0x0af0, 0x8304)},
	{USB_DEVICE(0x0af0, 0x8400)},
	{USB_DEVICE(0x0af0, 0x8600)},
	{USB_DEVICE(0x0af0, 0x8800)},
	{USB_DEVICE(0x0af0, 0x8900)},
	{USB_DEVICE(0x0af0, 0x9000)},
	{USB_DEVICE(0x0af0, 0xd035)},
	{USB_DEVICE(0x0af0, 0xd055)},
	{USB_DEVICE(0x0af0, 0xd155)},
	{USB_DEVICE(0x0af0, 0xd255)},
	{USB_DEVICE(0x0af0, 0xd057)},
	{USB_DEVICE(0x0af0, 0xd157)},
	{USB_DEVICE(0x0af0, 0xd257)},
	{USB_DEVICE(0x0af0, 0xd357)},
	{USB_DEVICE(0x0af0, 0xd058)},
	{USB_DEVICE(0x0af0, 0xc100)},
	{}
};
MODULE_DEVICE_TABLE(usb, hso_ids);

/* Sysfs attribute */
static ssize_t hso_sysfs_show_porttype(struct device *dev,
				       struct device_attribute *attr,
				       char *buf)
{
	struct hso_device *hso_dev = dev_get_drvdata(dev);
	char *port_name;

	if (!hso_dev)
		return 0;

	switch (hso_dev->port_spec & HSO_PORT_MASK) {
	case HSO_PORT_CONTROL:
		port_name = "Control";
		break;
	case HSO_PORT_APP:
		port_name = "Application";
		break;
	case HSO_PORT_APP2:
		port_name = "Application2";
		break;
	case HSO_PORT_GPS:
		port_name = "GPS";
		break;
	case HSO_PORT_GPS_CONTROL:
		port_name = "GPS Control";
		break;
	case HSO_PORT_PCSC:
		port_name = "PCSC";
		break;
	case HSO_PORT_DIAG:
		port_name = "Diagnostic";
		break;
	case HSO_PORT_DIAG2:
		port_name = "Diagnostic2";
		break;
	case HSO_PORT_MODEM:
		port_name = "Modem";
		break;
	case HSO_PORT_NETWORK:
		port_name = "Network";
		break;
	default:
		port_name = "Unknown";
		break;
	}

	return sprintf(buf, "%s\n", port_name);
}
static DEVICE_ATTR(hsotype, S_IRUGO, hso_sysfs_show_porttype, NULL);

static int hso_urb_to_index(struct hso_serial *serial, struct urb *urb)
{
	int idx;

	for (idx = 0; idx < serial->num_rx_urbs; idx++)
		if (serial->rx_urb[idx] == urb)
			return idx;
	dev_err(serial->parent->dev, "hso_urb_to_index failed\n");
	return -1;
}

/* converts mux value to a port spec value */
static u32 hso_mux_to_port(int mux)
{
	u32 result;

	switch (mux) {
	case 0x1:
		result = HSO_PORT_CONTROL;
		break;
	case 0x2:
		result = HSO_PORT_APP;
		break;
	case 0x4:
		result = HSO_PORT_PCSC;
		break;
	case 0x8:
		result = HSO_PORT_GPS;
		break;
	case 0x10:
		result = HSO_PORT_APP2;
		break;
	default:
		result = HSO_PORT_NO_PORT;
	}
	return result;
}

/* converts port spec value to a mux value */
static u32 hso_port_to_mux(int port)
{
	u32 result;

	switch (port & HSO_PORT_MASK) {
	case HSO_PORT_CONTROL:
		result = 0x0;
		break;
	case HSO_PORT_APP:
		result = 0x1;
		break;
	case HSO_PORT_PCSC:
		result = 0x2;
		break;
	case HSO_PORT_GPS:
		result = 0x3;
		break;
	case HSO_PORT_APP2:
		result = 0x4;
		break;
	default:
		result = 0x0;
	}
	return result;
}

static struct hso_serial *get_serial_by_shared_int_and_type(
					struct hso_shared_int *shared_int,
					int mux)
{
	int i, port;

	port = hso_mux_to_port(mux);

	for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) {
		if (serial_table[i] &&
		    (dev2ser(serial_table[i])->shared_int == shared_int) &&
		    ((serial_table[i]->port_spec & HSO_PORT_MASK) == port)) {
			return dev2ser(serial_table[i]);
		}
	}

	return NULL;
}

static struct hso_serial *get_serial_by_index(unsigned index)
{
	struct hso_serial *serial = NULL;
	unsigned long flags;

	spin_lock_irqsave(&serial_table_lock, flags);
	if (serial_table[index])
		serial = dev2ser(serial_table[index]);
	spin_unlock_irqrestore(&serial_table_lock, flags);

	return serial;
}

static int get_free_serial_index(void)
{
	int index;
	unsigned long flags;

	spin_lock_irqsave(&serial_table_lock, flags);
	for (index = 0; index < HSO_SERIAL_TTY_MINORS; index++) {
		if (serial_table[index] == NULL) {
			spin_unlock_irqrestore(&serial_table_lock, flags);
			return index;
		}
	}
	spin_unlock_irqrestore(&serial_table_lock, flags);

	printk(KERN_ERR "%s: no free serial devices in table\n", __func__);
	return -1;
}

static void set_serial_by_index(unsigned index, struct hso_serial *serial)
{
	unsigned long flags;

	spin_lock_irqsave(&serial_table_lock, flags);
	if (serial)
		serial_table[index] = serial->parent;
	else
		serial_table[index] = NULL;
	spin_unlock_irqrestore(&serial_table_lock, flags);
}

static void handle_usb_error(int status, const char *function,
			     struct hso_device *hso_dev)
{
	char *explanation;

	switch (status) {
	case -ENODEV:
		explanation = "no device";
		break;
	case -ENOENT:
		explanation = "endpoint not enabled";
		break;
	case -EPIPE:
		explanation = "endpoint stalled";
		break;
	case -ENOSPC:
		explanation = "not enough bandwidth";
		break;
	case -ESHUTDOWN:
		explanation = "device disabled";
		break;
	case -EHOSTUNREACH:
		explanation = "device suspended";
		break;
	case -EINVAL:
	case -EAGAIN:
	case -EFBIG:
	case -EMSGSIZE:
		explanation = "internal error";
		break;
	case -EILSEQ:
	case -EPROTO:
	case -ETIME:
	case -ETIMEDOUT:
		explanation = "protocol error";
		if (hso_dev)
			schedule_work(&hso_dev->reset_device);
		break;
	default:
		explanation = "unknown status";
		break;
	}

	/* log a meaningful explanation of an USB status */
	D1("%s: received USB status - %s (%d)", function, explanation, status);
}

/* Network interface functions */

/* called when net interface is brought up by ifconfig */
static int hso_net_open(struct net_device *net)
{
	struct hso_net *odev = netdev_priv(net);
	unsigned long flags = 0;

	if (!odev) {
		dev_err(&net->dev, "No net device !\n");
		return -ENODEV;
	}

	odev->skb_tx_buf = NULL;

	/* setup environment */
	spin_lock_irqsave(&odev->net_lock, flags);
	odev->rx_parse_state = WAIT_IP;
	odev->rx_buf_size = 0;
	odev->rx_buf_missing = sizeof(struct iphdr);
	spin_unlock_irqrestore(&odev->net_lock, flags);

	/* We are up and running. */
	set_bit(HSO_NET_RUNNING, &odev->flags);
	hso_start_net_device(odev->parent);

	/* Tell the kernel we are ready to start receiving from it */
	netif_start_queue(net);

	return 0;
}

/* called when interface is brought down by ifconfig */
static int hso_net_close(struct net_device *net)
{
	struct hso_net *odev = netdev_priv(net);

	/* we don't need the queue anymore */
	netif_stop_queue(net);
	/* no longer running */
	clear_bit(HSO_NET_RUNNING, &odev->flags);

	hso_stop_net_device(odev->parent);

	/* done */
	return 0;
}

/* USB tells is xmit done, we should start the netqueue again */
static void write_bulk_callback(struct urb *urb)
{
	struct hso_net *odev = urb->context;
	int status = urb->status;

	/* Sanity check */
	if (!odev || !test_bit(HSO_NET_RUNNING, &odev->flags)) {
		dev_err(&urb->dev->dev, "%s: device not running\n", __func__);
		return;
	}

	/* Do we still have a valid kernel network device? */
	if (!netif_device_present(odev->net)) {
		dev_err(&urb->dev->dev, "%s: net device not present\n",
			__func__);
		return;
	}

	/* log status, but don't act on it, we don't need to resubmit anything
	 * anyhow */
	if (status)
		handle_usb_error(status, __func__, odev->parent);

	hso_put_activity(odev->parent);

	/* Tell the network interface we are ready for another frame */
	netif_wake_queue(odev->net);
}

/* called by kernel when we need to transmit a packet */
static netdev_tx_t hso_net_start_xmit(struct sk_buff *skb,
					    struct net_device *net)
{
	struct hso_net *odev = netdev_priv(net);
	int result;

	/* Tell the kernel, "No more frames 'til we are done with this one." */
	netif_stop_queue(net);
	if (hso_get_activity(odev->parent) == -EAGAIN) {
		odev->skb_tx_buf = skb;
		return NETDEV_TX_OK;
	}

	/* log if asked */
	DUMP1(skb->data, skb->len);
	/* Copy it from kernel memory to OUR memory */
	memcpy(odev->mux_bulk_tx_buf, skb->data, skb->len);
	D1("len: %d/%d", skb->len, MUX_BULK_TX_BUF_SIZE);

	/* Fill in the URB for shipping it out. */
	usb_fill_bulk_urb(odev->mux_bulk_tx_urb,
			  odev->parent->usb,
			  usb_sndbulkpipe(odev->parent->usb,
					  odev->out_endp->
					  bEndpointAddress & 0x7F),
			  odev->mux_bulk_tx_buf, skb->len, write_bulk_callback,
			  odev);

	/* Deal with the Zero Length packet problem, I hope */
	odev->mux_bulk_tx_urb->transfer_flags |= URB_ZERO_PACKET;

	/* Send the URB on its merry way. */
	result = usb_submit_urb(odev->mux_bulk_tx_urb, GFP_ATOMIC);
	if (result) {
		dev_warn(&odev->parent->interface->dev,
			"failed mux_bulk_tx_urb %d\n", result);
		net->stats.tx_errors++;
		netif_start_queue(net);
	} else {
		net->stats.tx_packets++;
		net->stats.tx_bytes += skb->len;
	}
	dev_kfree_skb(skb);
	/* we're done */
	return NETDEV_TX_OK;
}

static const struct ethtool_ops ops = {
	.get_link = ethtool_op_get_link
};

/* called when a packet did not ack after watchdogtimeout */
static void hso_net_tx_timeout(struct net_device *net)
{
	struct hso_net *odev = netdev_priv(net);

	if (!odev)
		return;

	/* Tell syslog we are hosed. */
	dev_warn(&net->dev, "Tx timed out.\n");

	/* Tear the waiting frame off the list */
	if (odev->mux_bulk_tx_urb &&
	    (odev->mux_bulk_tx_urb->status == -EINPROGRESS))
		usb_unlink_urb(odev->mux_bulk_tx_urb);

	/* Update statistics */
	net->stats.tx_errors++;
}

/* make a real packet from the received USB buffer */
static void packetizeRx(struct hso_net *odev, unsigned char *ip_pkt,
			unsigned int count, unsigned char is_eop)
{
	unsigned short temp_bytes;
	unsigned short buffer_offset = 0;
	unsigned short frame_len;
	unsigned char *tmp_rx_buf;

	/* log if needed */
	D1("Rx %d bytes", count);
	DUMP(ip_pkt, min(128, (int)count));

	while (count) {
		switch (odev->rx_parse_state) {
		case WAIT_IP:
			/* waiting for IP header. */
			/* wanted bytes - size of ip header */
			temp_bytes =
			    (count <
			     odev->rx_buf_missing) ? count : odev->
			    rx_buf_missing;

			memcpy(((unsigned char *)(&odev->rx_ip_hdr)) +
			       odev->rx_buf_size, ip_pkt + buffer_offset,
			       temp_bytes);

			odev->rx_buf_size += temp_bytes;
			buffer_offset += temp_bytes;
			odev->rx_buf_missing -= temp_bytes;
			count -= temp_bytes;

			if (!odev->rx_buf_missing) {
				/* header is complete allocate an sk_buffer and
				 * continue to WAIT_DATA */
				frame_len = ntohs(odev->rx_ip_hdr.tot_len);

				if ((frame_len > DEFAULT_MRU) ||
				    (frame_len < sizeof(struct iphdr))) {
					dev_err(&odev->net->dev,
						"Invalid frame (%d) length\n",
						frame_len);
					odev->rx_parse_state = WAIT_SYNC;
					continue;
				}
				/* Allocate an sk_buff */
				odev->skb_rx_buf = netdev_alloc_skb(odev->net,
								    frame_len);
				if (!odev->skb_rx_buf) {
					/* We got no receive buffer. */
					D1("could not allocate memory");
					odev->rx_parse_state = WAIT_SYNC;
					return;
				}

				/* Copy what we got so far. make room for iphdr
				 * after tail. */
				tmp_rx_buf =
				    skb_put(odev->skb_rx_buf,
					    sizeof(struct iphdr));
				memcpy(tmp_rx_buf, (char *)&(odev->rx_ip_hdr),
				       sizeof(struct iphdr));

				/* ETH_HLEN */
				odev->rx_buf_size = sizeof(struct iphdr);

				/* Filip actually use .tot_len */
				odev->rx_buf_missing =
				    frame_len - sizeof(struct iphdr);
				odev->rx_parse_state = WAIT_DATA;
			}
			break;

		case WAIT_DATA:
			temp_bytes = (count < odev->rx_buf_missing)
					? count : odev->rx_buf_missing;

			/* Copy the rest of the bytes that are left in the
			 * buffer into the waiting sk_buf. */
			/* Make room for temp_bytes after tail. */
			tmp_rx_buf = skb_put(odev->skb_rx_buf, temp_bytes);
			memcpy(tmp_rx_buf, ip_pkt + buffer_offset, temp_bytes);

			odev->rx_buf_missing -= temp_bytes;
			count -= temp_bytes;
			buffer_offset += temp_bytes;
			odev->rx_buf_size += temp_bytes;
			if (!odev->rx_buf_missing) {
				/* Packet is complete. Inject into stack. */
				/* We have IP packet here */
				odev->skb_rx_buf->protocol = cpu_to_be16(ETH_P_IP);
				skb_reset_mac_header(odev->skb_rx_buf);

				/* Ship it off to the kernel */
				netif_rx(odev->skb_rx_buf);
				/* No longer our buffer. */
				odev->skb_rx_buf = NULL;

				/* update out statistics */
				odev->net->stats.rx_packets++;

				odev->net->stats.rx_bytes += odev->rx_buf_size;

				odev->rx_buf_size = 0;
				odev->rx_buf_missing = sizeof(struct iphdr);
				odev->rx_parse_state = WAIT_IP;
			}
			break;

		case WAIT_SYNC:
			D1(" W_S");
			count = 0;
			break;
		default:
			D1(" ");
			count--;
			break;
		}
	}

	/* Recovery mechanism for WAIT_SYNC state. */
	if (is_eop) {
		if (odev->rx_parse_state == WAIT_SYNC) {
			odev->rx_parse_state = WAIT_IP;
			odev->rx_buf_size = 0;
			odev->rx_buf_missing = sizeof(struct iphdr);
		}
	}
}

static void fix_crc_bug(struct urb *urb, __le16 max_packet_size)
{
	static const u8 crc_check[4] = { 0xDE, 0xAD, 0xBE, 0xEF };
	u32 rest = urb->actual_length % le16_to_cpu(max_packet_size);

	if (((rest == 5) || (rest == 6)) &&
	    !memcmp(((u8 *)urb->transfer_buffer) + urb->actual_length - 4,
		    crc_check, 4)) {
		urb->actual_length -= 4;
	}
}

/* Moving data from usb to kernel (in interrupt state) */
static void read_bulk_callback(struct urb *urb)
{
	struct hso_net *odev = urb->context;
	struct net_device *net;
	int result;
	int status = urb->status;

	/* is al ok?  (Filip: Who's Al ?) */
	if (status) {
		handle_usb_error(status, __func__, odev->parent);
		return;
	}

	/* Sanity check */
	if (!odev || !test_bit(HSO_NET_RUNNING, &odev->flags)) {
		D1("BULK IN callback but driver is not active!");
		return;
	}
	usb_mark_last_busy(urb->dev);

	net = odev->net;

	if (!netif_device_present(net)) {
		/* Somebody killed our network interface... */
		return;
	}

	if (odev->parent->port_spec & HSO_INFO_CRC_BUG)
		fix_crc_bug(urb, odev->in_endp->wMaxPacketSize);

	/* do we even have a packet? */
	if (urb->actual_length) {
		/* Handle the IP stream, add header and push it onto network
		 * stack if the packet is complete. */
		spin_lock(&odev->net_lock);
		packetizeRx(odev, urb->transfer_buffer, urb->actual_length,
			    (urb->transfer_buffer_length >
			     urb->actual_length) ? 1 : 0);
		spin_unlock(&odev->net_lock);
	}

	/* We are done with this URB, resubmit it. Prep the USB to wait for
	 * another frame. Reuse same as received. */
	usb_fill_bulk_urb(urb,
			  odev->parent->usb,
			  usb_rcvbulkpipe(odev->parent->usb,
					  odev->in_endp->
					  bEndpointAddress & 0x7F),
			  urb->transfer_buffer, MUX_BULK_RX_BUF_SIZE,
			  read_bulk_callback, odev);

	/* Give this to the USB subsystem so it can tell us when more data
	 * arrives. */
	result = usb_submit_urb(urb, GFP_ATOMIC);
	if (result)
		dev_warn(&odev->parent->interface->dev,
			 "%s failed submit mux_bulk_rx_urb %d\n", __func__,
			 result);
}

/* Serial driver functions */

static void hso_init_termios(struct ktermios *termios)
{
	/*
	 * The default requirements for this device are:
	 */
	termios->c_iflag &=
		~(IGNBRK	/* disable ignore break */
		| BRKINT	/* disable break causes interrupt */
		| PARMRK	/* disable mark parity errors */
		| ISTRIP	/* disable clear high bit of input characters */
		| INLCR		/* disable translate NL to CR */
		| IGNCR		/* disable ignore CR */
		| ICRNL		/* disable translate CR to NL */
		| IXON);	/* disable enable XON/XOFF flow control */

	/* disable postprocess output characters */
	termios->c_oflag &= ~OPOST;

	termios->c_lflag &=
		~(ECHO		/* disable echo input characters */
		| ECHONL	/* disable echo new line */
		| ICANON	/* disable erase, kill, werase, and rprnt
				   special characters */
		| ISIG		/* disable interrupt, quit, and suspend special
				   characters */
		| IEXTEN);	/* disable non-POSIX special characters */

	termios->c_cflag &=
		~(CSIZE		/* no size */
		| PARENB	/* disable parity bit */
		| CBAUD		/* clear current baud rate */
		| CBAUDEX);	/* clear current buad rate */

	termios->c_cflag |= CS8;	/* character size 8 bits */

	/* baud rate 115200 */
	tty_termios_encode_baud_rate(termios, 115200, 115200);
}

static void _hso_serial_set_termios(struct tty_struct *tty,
				    struct ktermios *old)
{
	struct hso_serial *serial = get_serial_by_tty(tty);
	struct ktermios *termios;

	if (!serial) {
		printk(KERN_ERR "%s: no tty structures", __func__);
		return;
	}

	D4("port %d", serial->minor);

	/*
	 *	Fix up unsupported bits
	 */
	termios = tty->termios;
	termios->c_iflag &= ~IXON; /* disable enable XON/XOFF flow control */

	termios->c_cflag &=
		~(CSIZE		/* no size */
		| PARENB	/* disable parity bit */
		| CBAUD		/* clear current baud rate */
		| CBAUDEX);	/* clear current buad rate */

	termios->c_cflag |= CS8;	/* character size 8 bits */

	/* baud rate 115200 */
	tty_encode_baud_rate(tty, 115200, 115200);
}

static void hso_resubmit_rx_bulk_urb(struct hso_serial *serial, struct urb *urb)
{
	int result;
	/* We are done with this URB, resubmit it. Prep the USB to wait for
	 * another frame */
	usb_fill_bulk_urb(urb, serial->parent->usb,
			  usb_rcvbulkpipe(serial->parent->usb,
					  serial->in_endp->
					  bEndpointAddress & 0x7F),
			  urb->transfer_buffer, serial->rx_data_length,
			  hso_std_serial_read_bulk_callback, serial);
	/* Give this to the USB subsystem so it can tell us when more data
	 * arrives. */
	result = usb_submit_urb(urb, GFP_ATOMIC);
	if (result) {
		dev_err(&urb->dev->dev, "%s failed submit serial rx_urb %d\n",
			__func__, result);
	}
}




static void put_rxbuf_data_and_resubmit_bulk_urb(struct hso_serial *serial)
{
	int count;
	struct urb *curr_urb;

	while (serial->rx_urb_filled[serial->curr_rx_urb_idx]) {
		curr_urb = serial->rx_urb[serial->curr_rx_urb_idx];
		count = put_rxbuf_data(curr_urb, serial);
		if (count == -1)
			return;
		if (count == 0) {
			serial->curr_rx_urb_idx++;
			if (serial->curr_rx_urb_idx >= serial->num_rx_urbs)
				serial->curr_rx_urb_idx = 0;
			hso_resubmit_rx_bulk_urb(serial, curr_urb);
		}
	}
}

static void put_rxbuf_data_and_resubmit_ctrl_urb(struct hso_serial *serial)
{
	int count = 0;
	struct urb *urb;

	urb = serial->rx_urb[0];
	if (serial->open_count > 0) {
		count = put_rxbuf_data(urb, serial);
		if (count == -1)
			return;
	}
	/* Re issue a read as long as we receive data. */

	if (count == 0 && ((urb->actual_length != 0) ||
			   (serial->rx_state == RX_PENDING))) {
		serial->rx_state = RX_SENT;
		hso_mux_serial_read(serial);
	} else
		serial->rx_state = RX_IDLE;
}


/* read callback for Diag and CS port */
static void hso_std_serial_read_bulk_callback(struct urb *urb)
{
	struct hso_serial *serial = urb->context;
	int status = urb->status;

	/* sanity check */
	if (!serial) {
		D1("serial == NULL");
		return;
	} else if (status) {
		handle_usb_error(status, __func__, serial->parent);
		return;
	}

	D4("\n--- Got serial_read_bulk callback %02x ---", status);
	D1("Actual length = %d\n", urb->actual_length);
	DUMP1(urb->transfer_buffer, urb->actual_length);

	/* Anyone listening? */
	if (serial->open_count == 0)
		return;

	if (status == 0) {
		if (serial->parent->port_spec & HSO_INFO_CRC_BUG)
			fix_crc_bug(urb, serial->in_endp->wMaxPacketSize);
		/* Valid data, handle RX data */
		spin_lock(&serial->serial_lock);
		serial->rx_urb_filled[hso_urb_to_index(serial, urb)] = 1;
		put_rxbuf_data_and_resubmit_bulk_urb(serial);
		spin_unlock(&serial->serial_lock);
	} else if (status == -ENOENT || status == -ECONNRESET) {
		/* Unlinked - check for throttled port. */
		D2("Port %d, successfully unlinked urb", serial->minor);
		spin_lock(&serial->serial_lock);
		serial->rx_urb_filled[hso_urb_to_index(serial, urb)] = 0;
		hso_resubmit_rx_bulk_urb(serial, urb);
		spin_unlock(&serial->serial_lock);
	} else {
		D2("Port %d, status = %d for read urb", serial->minor, status);
		return;
	}
}

/*
 * This needs to be a tasklet otherwise we will
 * end up recursively calling this function.
 */
static void hso_unthrottle_tasklet(struct hso_serial *serial)
{
	unsigned long flags;

	spin_lock_irqsave(&serial->serial_lock, flags);
	if ((serial->parent->port_spec & HSO_INTF_MUX))
		put_rxbuf_data_and_resubmit_ctrl_urb(serial);
	else
		put_rxbuf_data_and_resubmit_bulk_urb(serial);
	spin_unlock_irqrestore(&serial->serial_lock, flags);
}

static	void hso_unthrottle(struct tty_struct *tty)
{
	struct hso_serial *serial = get_serial_by_tty(tty);

	tasklet_hi_schedule(&serial->unthrottle_tasklet);
}

static void hso_unthrottle_workfunc(struct work_struct *work)
{
	struct hso_serial *serial =
	    container_of(work, struct hso_serial,
			 retry_unthrottle_workqueue);
	hso_unthrottle_tasklet(serial);
}

/* open the requested serial port */
static int hso_serial_open(struct tty_struct *tty, struct file *filp)
{
	struct hso_serial *serial = get_serial_by_index(tty->index);
	int result;

	/* sanity check */
	if (serial == NULL || serial->magic != HSO_SERIAL_MAGIC) {
		WARN_ON(1);
		tty->driver_data = NULL;
		D1("Failed to open port");
		return -ENODEV;
	}

	mutex_lock(&serial->parent->mutex);
	result = usb_autopm_get_interface(serial->parent->interface);
	if (result < 0)
		goto err_out;

	D1("Opening %d", serial->minor);
	kref_get(&serial->parent->ref);

	/* setup */
	spin_lock_irq(&serial->serial_lock);
	tty->driver_data = serial;
	tty_kref_put(serial->tty);
	serial->tty = tty_kref_get(tty);
	spin_unlock_irq(&serial->serial_lock);

	/* check for port already opened, if not set the termios */
	serial->open_count++;
	if (serial->open_count == 1) {
		serial->rx_state = RX_IDLE;
		/* Force default termio settings */
		_hso_serial_set_termios(tty, NULL);
		tasklet_init(&serial->unthrottle_tasklet,
			     (void (*)(unsigned long))hso_unthrottle_tasklet,
			     (unsigned long)serial);
		INIT_WORK(&serial->retry_unthrottle_workqueue,
			  hso_unthrottle_workfunc);
		result = hso_start_serial_device(serial->parent, GFP_KERNEL);
		if (result) {
			hso_stop_serial_device(serial->parent);
			serial->open_count--;
			kref_put(&serial->parent->ref, hso_serial_ref_free);
		}
	} else {
		D1("Port was already open");
	}

	usb_autopm_put_interface(serial->parent->interface);

	/* done */
	if (result)
		hso_serial_tiocmset(tty, TIOCM_RTS | TIOCM_DTR, 0);
err_out:
	mutex_unlock(&serial->parent->mutex);
	return result;
}

/* close the requested serial port */
static void hso_serial_close(struct tty_struct *tty, struct file *filp)
{
	struct hso_serial *serial = tty->driver_data;
	u8 usb_gone;

	D1("Closing serial port");

	/* Open failed, no close cleanup required */
	if (serial == NULL)
		return;

	mutex_lock(&serial->parent->mutex);
	usb_gone = serial->parent->usb_gone;

	if (!usb_gone)
		usb_autopm_get_interface(serial->parent->interface);

	/* reset the rts and dtr */
	/* do the actual close */
	serial->open_count--;

	if (serial->open_count <= 0) {
		serial->open_count = 0;
		spin_lock_irq(&serial->serial_lock);
		if (serial->tty == tty) {
			serial->tty->driver_data = NULL;
			serial->tty = NULL;
			tty_kref_put(tty);
		}
		spin_unlock_irq(&serial->serial_lock);
		if (!usb_gone)
			hso_stop_serial_device(serial->parent);
		tasklet_kill(&serial->unthrottle_tasklet);
		cancel_work_sync(&serial->retry_unthrottle_workqueue);
	}

	if (!usb_gone)
		usb_autopm_put_interface(serial->parent->interface);

	mutex_unlock(&serial->parent->mutex);

	kref_put(&serial->parent->ref, hso_serial_ref_free);
}

/* close the requested serial port */
static int hso_serial_write(struct tty_struct *tty, const unsigned char *buf,
			    int count)
{
	struct hso_serial *serial = get_serial_by_tty(tty);
	int space, tx_bytes;
	unsigned long flags;

	/* sanity check */
	if (serial == NULL) {
		printk(KERN_ERR "%s: serial is NULL\n", __func__);
		return -ENODEV;
	}

	spin_lock_irqsave(&serial->serial_lock, flags);

	space = serial->tx_data_length - serial->tx_buffer_count;
	tx_bytes = (count < space) ? count : space;

	if (!tx_bytes)
		goto out;

	memcpy(serial->tx_buffer + serial->tx_buffer_count, buf, tx_bytes);
	serial->tx_buffer_count += tx_bytes;

out:
	spin_unlock_irqrestore(&serial->serial_lock, flags);

	hso_kick_transmit(serial);
	/* done */
	return tx_bytes;
}

/* how much room is there for writing */
static int hso_serial_write_room(struct tty_struct *tty)
{
	struct hso_serial *serial = get_serial_by_tty(tty);
	int room;
	unsigned long flags;

	spin_lock_irqsave(&serial->serial_lock, flags);
	room = serial->tx_data_length - serial->tx_buffer_count;
	spin_unlock_irqrestore(&serial->serial_lock, flags);

	/* return free room */
	return room;
}

/* setup the term */
static void hso_serial_set_termios(struct tty_struct *tty, struct ktermios *old)
{
	struct hso_serial *serial = get_serial_by_tty(tty);
	unsigned long flags;

	if (old)
		D5("Termios called with: cflags new[%d] - old[%d]",
		   tty->termios->c_cflag, old->c_cflag);

	/* the actual setup */
	spin_lock_irqsave(&serial->serial_lock, flags);
	if (serial->open_count)
		_hso_serial_set_termios(tty, old);
	else
		tty->termios = old;
	spin_unlock_irqrestore(&serial->serial_lock, flags);

	/* done */
}

/* how many characters in the buffer */
static int hso_serial_chars_in_buffer(struct tty_struct *tty)
{
	struct hso_serial *serial = get_serial_by_tty(tty);
	int chars;
	unsigned long flags;

	/* sanity check */
	if (serial == NULL)
		return 0;

	spin_lock_irqsave(&serial->serial_lock, flags);
	chars = serial->tx_buffer_count;
	spin_unlock_irqrestore(&serial->serial_lock, flags);

	return chars;
}
static int tiocmget_submit_urb(struct hso_serial *serial,
			       struct hso_tiocmget *tiocmget,
			       struct usb_device *usb)
{
	int result;

	if (serial->parent->usb_gone)
		return -ENODEV;
	usb_fill_int_urb(tiocmget->urb, usb,
			 usb_rcvintpipe(usb,
					tiocmget->endp->
					bEndpointAddress & 0x7F),
			 &tiocmget->serial_state_notification,
			 sizeof(struct hso_serial_state_notification),
			 tiocmget_intr_callback, serial,
			 tiocmget->endp->bInterval);
	result = usb_submit_urb(tiocmget->urb, GFP_ATOMIC);
	if (result) {
		dev_warn(&usb->dev, "%s usb_submit_urb failed %d\n", __func__,
			 result);
	}
	return result;

}

static void tiocmget_intr_callback(struct urb *urb)
{
	struct hso_serial *serial = urb->context;
	struct hso_tiocmget *tiocmget;
	int status = urb->status;
	u16 UART_state_bitmap, prev_UART_state_bitmap;
	struct uart_icount *icount;
	struct hso_serial_state_notification *serial_state_notification;
	struct usb_device *usb;

	/* Sanity checks */
	if (!serial)
		return;
	if (status) {
		handle_usb_error(status, __func__, serial->parent);
		return;
	}
	tiocmget = serial->tiocmget;
	if (!tiocmget)
		return;
	usb = serial->parent->usb;
	serial_state_notification = &tiocmget->serial_state_notification;
	if (serial_state_notification->bmRequestType != BM_REQUEST_TYPE ||
	    serial_state_notification->bNotification != B_NOTIFICATION ||
	    le16_to_cpu(serial_state_notification->wValue) != W_VALUE ||
	    le16_to_cpu(serial_state_notification->wIndex) != W_INDEX ||
	    le16_to_cpu(serial_state_notification->wLength) != W_LENGTH) {
		dev_warn(&usb->dev,
			 "hso received invalid serial state notification\n");
		DUMP(serial_state_notification,
		     sizeof(struct hso_serial_state_notification));
	} else {

		UART_state_bitmap = le16_to_cpu(serial_state_notification->
						UART_state_bitmap);
		prev_UART_state_bitmap = tiocmget->prev_UART_state_bitmap;
		icount = &tiocmget->icount;
		spin_lock(&serial->serial_lock);
		if ((UART_state_bitmap & B_OVERRUN) !=
		   (prev_UART_state_bitmap & B_OVERRUN))
			icount->parity++;
		if ((UART_state_bitmap & B_PARITY) !=
		   (prev_UART_state_bitmap & B_PARITY))
			icount->parity++;
		if ((UART_state_bitmap & B_FRAMING) !=
		   (prev_UART_state_bitmap & B_FRAMING))
			icount->frame++;
		if ((UART_state_bitmap & B_RING_SIGNAL) &&
		   !(prev_UART_state_bitmap & B_RING_SIGNAL))
			icount->rng++;
		if ((UART_state_bitmap & B_BREAK) !=
		   (prev_UART_state_bitmap & B_BREAK))
			icount->brk++;
		if ((UART_state_bitmap & B_TX_CARRIER) !=
		   (prev_UART_state_bitmap & B_TX_CARRIER))
			icount->dsr++;
		if ((UART_state_bitmap & B_RX_CARRIER) !=
		   (prev_UART_state_bitmap & B_RX_CARRIER))
			icount->dcd++;
		tiocmget->prev_UART_state_bitmap = UART_state_bitmap;
		spin_unlock(&serial->serial_lock);
		tiocmget->intr_completed = 1;
		wake_up_interruptible(&tiocmget->waitq);
	}
	memset(serial_state_notification, 0,
	       sizeof(struct hso_serial_state_notification));
	tiocmget_submit_urb(serial,
			    tiocmget,
			    serial->parent->usb);
}

/*
 * next few functions largely stolen from drivers/serial/serial_core.c
 */
/* Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change
 * - mask passed in arg for lines of interest
 *   (use |'ed TIOCM_RNG/DSR/CD/CTS for masking)
 * Caller should use TIOCGICOUNT to see which one it was
 */
static int
hso_wait_modem_status(struct hso_serial *serial, unsigned long arg)
{
	DECLARE_WAITQUEUE(wait, current);
	struct uart_icount cprev, cnow;
	struct hso_tiocmget  *tiocmget;
	int ret;

	tiocmget = serial->tiocmget;
	if (!tiocmget)
		return -ENOENT;
	/*
	 * note the counters on entry
	 */
	spin_lock_irq(&serial->serial_lock);
	memcpy(&cprev, &tiocmget->icount, sizeof(struct uart_icount));
	spin_unlock_irq(&serial->serial_lock);
	add_wait_queue(&tiocmget->waitq, &wait);
	for (;;) {
		spin_lock_irq(&serial->serial_lock);
		memcpy(&cnow, &tiocmget->icount, sizeof(struct uart_icount));
		spin_unlock_irq(&serial->serial_lock);
		set_current_state(TASK_INTERRUPTIBLE);
		if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
		    ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
		    ((arg & TIOCM_CD)  && (cnow.dcd != cprev.dcd))) {
			ret = 0;
			break;
		}
		schedule();
		/* see if a signal did it */
		if (signal_pending(current)) {
			ret = -ERESTARTSYS;
			break;
		}
		cprev = cnow;
	}
	current->state = TASK_RUNNING;
	remove_wait_queue(&tiocmget->waitq, &wait);

	return ret;
}

/*
 * Get counter of input serial line interrupts (DCD,RI,DSR,CTS)
 * Return: write counters to the user passed counter struct
 * NB: both 1->0 and 0->1 transitions are counted except for
 *     RI where only 0->1 is counted.
 */
static int hso_get_count(struct tty_struct *tty,
		  struct serial_icounter_struct *icount)
{
	struct uart_icount cnow;
	struct hso_serial *serial = get_serial_by_tty(tty);
	struct hso_tiocmget  *tiocmget = serial->tiocmget;

	memset(&icount, 0, sizeof(struct serial_icounter_struct));

	if (!tiocmget)
		 return -ENOENT;
	spin_lock_irq(&serial->serial_lock);
	memcpy(&cnow, &tiocmget->icount, sizeof(struct uart_icount));
	spin_unlock_irq(&serial->serial_lock);

	icount->cts         = cnow.cts;
	icount->dsr         = cnow.dsr;
	icount->rng         = cnow.rng;
	icount->dcd         = cnow.dcd;
	icount->rx          = cnow.rx;
	icount->tx          = cnow.tx;
	icount->frame       = cnow.frame;
	icount->overrun     = cnow.overrun;
	icount->parity      = cnow.parity;
	icount->brk         = cnow.brk;
	icount->buf_overrun = cnow.buf_overrun;

	return 0;
}


static int hso_serial_tiocmget(struct tty_struct *tty)
{
	int retval;
	struct hso_serial *serial = get_serial_by_tty(tty);
	struct hso_tiocmget  *tiocmget;
	u16 UART_state_bitmap;

	/* sanity check */
	if (!serial) {
		D1("no tty structures");
		return -EINVAL;
	}
	spin_lock_irq(&serial->serial_lock);
	retval = ((serial->rts_state) ? TIOCM_RTS : 0) |
	    ((serial->dtr_state) ? TIOCM_DTR : 0);
	tiocmget = serial->tiocmget;
	if (tiocmget) {

		UART_state_bitmap = le16_to_cpu(
			tiocmget->prev_UART_state_bitmap);
		if (UART_state_bitmap & B_RING_SIGNAL)
			retval |=  TIOCM_RNG;
		if (UART_state_bitmap & B_RX_CARRIER)
			retval |=  TIOCM_CD;
		if (UART_state_bitmap & B_TX_CARRIER)
			retval |=  TIOCM_DSR;
	}
	spin_unlock_irq(&serial->serial_lock);
	return retval;
}

static int hso_serial_tiocmset(struct tty_struct *tty,
			       unsigned int set, unsigned int clear)
{
	int val = 0;
	unsigned long flags;
	int if_num;
	struct hso_serial *serial = get_serial_by_tty(tty);

	/* sanity check */
	if (!serial) {
		D1("no tty structures");
		return -EINVAL;
	}

	if ((serial->parent->port_spec & HSO_PORT_MASK) != HSO_PORT_MODEM)
		return -EINVAL;

	if_num = serial->parent->interface->altsetting->desc.bInterfaceNumber;

	spin_lock_irqsave(&serial->serial_lock, flags);
	if (set & TIOCM_RTS)
		serial->rts_state = 1;
	if (set & TIOCM_DTR)
		serial->dtr_state = 1;

	if (clear & TIOCM_RTS)
		serial->rts_state = 0;
	if (clear & TIOCM_DTR)
		serial->dtr_state = 0;

	if (serial->dtr_state)
		val |= 0x01;
	if (serial->rts_state)
		val |= 0x02;

	spin_unlock_irqrestore(&serial->serial_lock, flags);

	return usb_control_msg(serial->parent->usb,
			       usb_rcvctrlpipe(serial->parent->usb, 0), 0x22,
			       0x21, val, if_num, NULL, 0,
			       USB_CTRL_SET_TIMEOUT);
}

static int hso_serial_ioctl(struct tty_struct *tty,
			    unsigned int cmd, unsigned long arg)
{
	struct hso_serial *serial =  get_serial_by_tty(tty);
	int ret = 0;
	D4("IOCTL cmd: %d, arg: %ld", cmd, arg);

	if (!serial)
		return -ENODEV;
	switch (cmd) {
	case TIOCMIWAIT:
		ret = hso_wait_modem_status(serial, arg);
		break;
	default:
		ret = -ENOIOCTLCMD;
		break;
	}
	return ret;
}


/* starts a transmit */
static void hso_kick_transmit(struct hso_serial *serial)
{
	u8 *temp;
	unsigned long flags;
	int res;

	spin_lock_irqsave(&serial->serial_lock, flags);
	if (!serial->tx_buffer_count)
		goto out;

	if (serial->tx_urb_used)
		goto out;

	/* Wakeup USB interface if necessary */
	if (hso_get_activity(serial->parent) == -EAGAIN)
		goto out;

	/* Switch pointers around to avoid memcpy */
	temp = serial->tx_buffer;
	serial->tx_buffer = serial->tx_data;
	serial->tx_data = temp;
	serial->tx_data_count = serial->tx_buffer_count;
	serial->tx_buffer_count = 0;

	/* If temp is set, it means we switched buffers */
	if (temp && serial->write_data) {
		res = serial->write_data(serial);
		if (res >= 0)
			serial->tx_urb_used = 1;
	}
out:
	spin_unlock_irqrestore(&serial->serial_lock, flags);
}

/* make a request (for reading and writing data to muxed serial port) */
static int mux_device_request(struct hso_serial *serial, u8 type, u16 port,
			      struct urb *ctrl_urb,
			      struct usb_ctrlrequest *ctrl_req,
			      u8 *ctrl_urb_data, u32 size)
{
	int result;
	int pipe;

	/* Sanity check */
	if (!serial || !ctrl_urb || !ctrl_req) {
		printk(KERN_ERR "%s: Wrong arguments\n", __func__);
		return -EINVAL;
	}

	/* initialize */
	ctrl_req->wValue = 0;
	ctrl_req->wIndex = cpu_to_le16(hso_port_to_mux(port));
	ctrl_req->wLength = cpu_to_le16(size);

	if (type == USB_CDC_GET_ENCAPSULATED_RESPONSE) {
		/* Reading command */
		ctrl_req->bRequestType = USB_DIR_IN |
					 USB_TYPE_OPTION_VENDOR |
					 USB_RECIP_INTERFACE;
		ctrl_req->bRequest = USB_CDC_GET_ENCAPSULATED_RESPONSE;
		pipe = usb_rcvctrlpipe(serial->parent->usb, 0);
	} else {
		/* Writing command */
		ctrl_req->bRequestType = USB_DIR_OUT |
					 USB_TYPE_OPTION_VENDOR |
					 USB_RECIP_INTERFACE;
		ctrl_req->bRequest = USB_CDC_SEND_ENCAPSULATED_COMMAND;
		pipe = usb_sndctrlpipe(serial->parent->usb, 0);
	}
	/* syslog */
	D2("%s command (%02x) len: %d, port: %d",
	   type == USB_CDC_GET_ENCAPSULATED_RESPONSE ? "Read" : "Write",
	   ctrl_req->bRequestType, ctrl_req->wLength, port);

	/* Load ctrl urb */
	ctrl_urb->transfer_flags = 0;
	usb_fill_control_urb(ctrl_urb,
			     serial->parent->usb,
			     pipe,
			     (u8 *) ctrl_req,
			     ctrl_urb_data, size, ctrl_callback, serial);
	/* Send it on merry way */
	result = usb_submit_urb(ctrl_urb, GFP_ATOMIC);
	if (result) {
		dev_err(&ctrl_urb->dev->dev,
			"%s failed submit ctrl_urb %d type %d\n", __func__,
			result, type);
		return result;
	}

	/* done */
	return size;
}

/* called by intr_callback when read occurs */
static int hso_mux_serial_read(struct hso_serial *serial)
{
	if (!serial)
		return -EINVAL;

	/* clean data */
	memset(serial->rx_data[0], 0, CTRL_URB_RX_SIZE);
	/* make the request */

	if (serial->num_rx_urbs != 1) {
		dev_err(&serial->parent->interface->dev,
			"ERROR: mux'd reads with multiple buffers "
			"not possible\n");
		return 0;
	}
	return mux_device_request(serial,
				  USB_CDC_GET_ENCAPSULATED_RESPONSE,
				  serial->parent->port_spec & HSO_PORT_MASK,
				  serial->rx_urb[0],
				  &serial->ctrl_req_rx,
				  serial->rx_data[0], serial->rx_data_length);
}

/* used for muxed serial port callback (muxed serial read) */
static void intr_callback(struct urb *urb)
{
	struct hso_shared_int *shared_int = urb->context;
	struct hso_serial *serial;
	unsigned char *port_req;
	int status = urb->status;
	int i;

	usb_mark_last_busy(urb->dev);

	/* sanity check */
	if (!shared_int)
		return;

	/* status check */
	if (status) {
		handle_usb_error(status, __func__, NULL);
		return;
	}
	D4("\n--- Got intr callback 0x%02X ---", status);

	/* what request? */
	port_req = urb->transfer_buffer;
	D4(" port_req = 0x%.2X\n", *port_req);
	/* loop over all muxed ports to find the one sending this */
	for (i = 0; i < 8; i++) {
		/* max 8 channels on MUX */
		if (*port_req & (1 << i)) {
			serial = get_serial_by_shared_int_and_type(shared_int,
								   (1 << i));
			if (serial != NULL) {
				D1("Pending read interrupt on port %d\n", i);
				spin_lock(&serial->serial_lock);
				if (serial->rx_state == RX_IDLE &&
					serial->open_count > 0) {
					/* Setup and send a ctrl req read on
					 * port i */
					if (!serial->rx_urb_filled[0]) {
						serial->rx_state = RX_SENT;
						hso_mux_serial_read(serial);
					} else
						serial->rx_state = RX_PENDING;
				} else {
					D1("Already a read pending on "
					   "port %d or port not open\n", i);
				}
				spin_unlock(&serial->serial_lock);
			}
		}
	}
	/* Resubmit interrupt urb */
	hso_mux_submit_intr_urb(shared_int, urb->dev, GFP_ATOMIC);
}

/* called for writing to muxed serial port */
static int hso_mux_serial_write_data(struct hso_serial *serial)
{
	if (NULL == serial)
		return -EINVAL;

	return mux_device_request(serial,
				  USB_CDC_SEND_ENCAPSULATED_COMMAND,
				  serial->parent->port_spec & HSO_PORT_MASK,
				  serial->tx_urb,
				  &serial->ctrl_req_tx,
				  serial->tx_data, serial->tx_data_count);
}

/* write callback for Diag and CS port */
static void hso_std_serial_write_bulk_callback(struct urb *urb)
{
	struct hso_serial *serial = urb->context;
	int status = urb->status;
	struct tty_struct *tty;

	/* sanity check */
	if (!serial) {
		D1("serial == NULL");
		return;
	}

	spin_lock(&serial->serial_lock);
	serial->tx_urb_used = 0;
	tty = tty_kref_get(serial->tty);
	spin_unlock(&serial->serial_lock);
	if (status) {
		handle_usb_error(status, __func__, serial->parent);
		tty_kref_put(tty);
		return;
	}
	hso_put_activity(serial->parent);
	if (tty) {
		tty_wakeup(tty);
		tty_kref_put(tty);
	}
	hso_kick_transmit(serial);

	D1(" ");
}

/* called for writing diag or CS serial port */
static int hso_std_serial_write_data(struct hso_serial *serial)
{
	int count = serial->tx_data_count;
	int result;

	usb_fill_bulk_urb(serial->tx_urb,
			  serial->parent->usb,
			  usb_sndbulkpipe(serial->parent->usb,
					  serial->out_endp->
					  bEndpointAddress & 0x7F),
			  serial->tx_data, serial->tx_data_count,
			  hso_std_serial_write_bulk_callback, serial);

	result = usb_submit_urb(serial->tx_urb, GFP_ATOMIC);
	if (result) {
		dev_warn(&serial->parent->usb->dev,
			 "Failed to submit urb - res %d\n", result);
		return result;
	}

	return count;
}

/* callback after read or write on muxed serial port */
static void ctrl_callback(struct urb *urb)
{
	struct hso_serial *serial = urb->context;
	struct usb_ctrlrequest *req;
	int status = urb->status;
	struct tty_struct *tty;

	/* sanity check */
	if (!serial)
		return;

	spin_lock(&serial->serial_lock);
	serial->tx_urb_used = 0;
	tty = tty_kref_get(serial->tty);
	spin_unlock(&serial->serial_lock);
	if (status) {
		handle_usb_error(status, __func__, serial->parent);
		tty_kref_put(tty);
		return;
	}

	/* what request? */
	req = (struct usb_ctrlrequest *)(urb->setup_packet);
	D4("\n--- Got muxed ctrl callback 0x%02X ---", status);
	D4("Actual length of urb = %d\n", urb->actual_length);
	DUMP1(urb->transfer_buffer, urb->actual_length);

	if (req->bRequestType ==
	    (USB_DIR_IN | USB_TYPE_OPTION_VENDOR | USB_RECIP_INTERFACE)) {
		/* response to a read command */
		serial->rx_urb_filled[0] = 1;
		spin_lock(&serial->serial_lock);
		put_rxbuf_data_and_resubmit_ctrl_urb(serial);
		spin_unlock(&serial->serial_lock);
	} else {
		hso_put_activity(serial->parent);
		if (tty)
			tty_wakeup(tty);
		/* response to a write command */
		hso_kick_transmit(serial);
	}
	tty_kref_put(tty);
}

/* handle RX data for serial port */
static int put_rxbuf_data(struct urb *urb, struct hso_serial *serial)
{
	struct tty_struct *tty;
	int write_length_remaining = 0;
	int curr_write_len;

	/* Sanity check */
	if (urb == NULL || serial == NULL) {
		D1("serial = NULL");
		return -2;
	}

	/* All callers to put_rxbuf_data hold serial_lock */
	tty = tty_kref_get(serial->tty);

	/* Push data to tty */
	if (tty) {
		write_length_remaining = urb->actual_length -
			serial->curr_rx_urb_offset;
		D1("data to push to tty");
		while (write_length_remaining) {
			if (test_bit(TTY_THROTTLED, &tty->flags)) {
				tty_kref_put(tty);
				return -1;
			}
			curr_write_len =  tty_insert_flip_string
				(tty, urb->transfer_buffer +
				 serial->curr_rx_urb_offset,
				 write_length_remaining);
			serial->curr_rx_urb_offset += curr_write_len;
			write_length_remaining -= curr_write_len;
			tty_flip_buffer_push(tty);
		}
	}
	if (write_length_remaining == 0) {
		serial->curr_rx_urb_offset = 0;
		serial->rx_urb_filled[hso_urb_to_index(serial, urb)] = 0;
	}
	tty_kref_put(tty);
	return write_length_remaining;
}


/* Base driver functions */

static void hso_log_port(struct hso_device *hso_dev)
{
	char *port_type;
	char port_dev[20];

	switch (hso_dev->port_spec & HSO_PORT_MASK) {
	case HSO_PORT_CONTROL:
		port_type = "Control";
		break;
	case HSO_PORT_APP:
		port_type = "Application";
		break;
	case HSO_PORT_GPS:
		port_type = "GPS";
		break;
	case HSO_PORT_GPS_CONTROL:
		port_type = "GPS control";
		break;
	case HSO_PORT_APP2:
		port_type = "Application2";
		break;
	case HSO_PORT_PCSC:
		port_type = "PCSC";
		break;
	case HSO_PORT_DIAG:
		port_type = "Diagnostic";
		break;
	case HSO_PORT_DIAG2:
		port_type = "Diagnostic2";
		break;
	case HSO_PORT_MODEM:
		port_type = "Modem";
		break;
	case HSO_PORT_NETWORK:
		port_type = "Network";
		break;
	default:
		port_type = "Unknown";
		break;
	}
	if ((hso_dev->port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK) {
		sprintf(port_dev, "%s", dev2net(hso_dev)->net->name);
	} else
		sprintf(port_dev, "/dev/%s%d", tty_filename,
			dev2ser(hso_dev)->minor);

	dev_dbg(&hso_dev->interface->dev, "HSO: Found %s port %s\n",
		port_type, port_dev);
}

static int hso_start_net_device(struct hso_device *hso_dev)
{
	int i, result = 0;
	struct hso_net *hso_net = dev2net(hso_dev);

	if (!hso_net)
		return -ENODEV;

	/* send URBs for all read buffers */
	for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) {

		/* Prep a receive URB */
		usb_fill_bulk_urb(hso_net->mux_bulk_rx_urb_pool[i],
				  hso_dev->usb,
				  usb_rcvbulkpipe(hso_dev->usb,
						  hso_net->in_endp->
						  bEndpointAddress & 0x7F),
				  hso_net->mux_bulk_rx_buf_pool[i],
				  MUX_BULK_RX_BUF_SIZE, read_bulk_callback,
				  hso_net);

		/* Put it out there so the device can send us stuff */
		result = usb_submit_urb(hso_net->mux_bulk_rx_urb_pool[i],
					GFP_NOIO);
		if (result)
			dev_warn(&hso_dev->usb->dev,
				"%s failed mux_bulk_rx_urb[%d] %d\n", __func__,
				i, result);
	}

	return result;
}

static int hso_stop_net_device(struct hso_device *hso_dev)
{
	int i;
	struct hso_net *hso_net = dev2net(hso_dev);

	if (!hso_net)
		return -ENODEV;

	for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) {
		if (hso_net->mux_bulk_rx_urb_pool[i])
			usb_kill_urb(hso_net->mux_bulk_rx_urb_pool[i]);

	}
	if (hso_net->mux_bulk_tx_urb)
		usb_kill_urb(hso_net->mux_bulk_tx_urb);

	return 0;
}

static int hso_start_serial_device(struct hso_device *hso_dev, gfp_t flags)
{
	int i, result = 0;
	struct hso_serial *serial = dev2ser(hso_dev);

	if (!serial)
		return -ENODEV;

	/* If it is not the MUX port fill in and submit a bulk urb (already
	 * allocated in hso_serial_start) */
	if (!(serial->parent->port_spec & HSO_INTF_MUX)) {
		for (i = 0; i < serial->num_rx_urbs; i++) {
			usb_fill_bulk_urb(serial->rx_urb[i],
					  serial->parent->usb,
					  usb_rcvbulkpipe(serial->parent->usb,
							  serial->in_endp->
							  bEndpointAddress &
							  0x7F),
					  serial->rx_data[i],
					  serial->rx_data_length,
					  hso_std_serial_read_bulk_callback,
					  serial);
			result = usb_submit_urb(serial->rx_urb[i], flags);
			if (result) {
				dev_warn(&serial->parent->usb->dev,
					 "Failed to submit urb - res %d\n",
					 result);
				break;
			}
		}
	} else {
		mutex_lock(&serial->shared_int->shared_int_lock);
		if (!serial->shared_int->use_count) {
			result =
			    hso_mux_submit_intr_urb(serial->shared_int,
						    hso_dev->usb, flags);
		}
		serial->shared_int->use_count++;
		mutex_unlock(&serial->shared_int->shared_int_lock);
	}
	if (serial->tiocmget)
		tiocmget_submit_urb(serial,
				    serial->tiocmget,
				    serial->parent->usb);
	return result;
}

static int hso_stop_serial_device(struct hso_device *hso_dev)
{
	int i;
	struct hso_serial *serial = dev2ser(hso_dev);
	struct hso_tiocmget  *tiocmget;

	if (!serial)
		return -ENODEV;

	for (i = 0; i < serial->num_rx_urbs; i++) {
		if (serial->rx_urb[i]) {
				usb_kill_urb(serial->rx_urb[i]);
				serial->rx_urb_filled[i] = 0;
		}
	}
	serial->curr_rx_urb_idx = 0;
	serial->curr_rx_urb_offset = 0;

	if (serial->tx_urb)
		usb_kill_urb(serial->tx_urb);

	if (serial->shared_int) {
		mutex_lock(&serial->shared_int->shared_int_lock);
		if (serial->shared_int->use_count &&
		    (--serial->shared_int->use_count == 0)) {
			struct urb *urb;

			urb = serial->shared_int->shared_intr_urb;
			if (urb)
				usb_kill_urb(urb);
		}
		mutex_unlock(&serial->shared_int->shared_int_lock);
	}
	tiocmget = serial->tiocmget;
	if (tiocmget) {
		wake_up_interruptible(&tiocmget->waitq);
		usb_kill_urb(tiocmget->urb);
	}

	return 0;
}

static void hso_serial_common_free(struct hso_serial *serial)
{
	int i;

	if (serial->parent->dev)
		device_remove_file(serial->parent->dev, &dev_attr_hsotype);

	tty_unregister_device(tty_drv, serial->minor);

	for (i = 0; i < serial->num_rx_urbs; i++) {
		/* unlink and free RX URB */
		usb_free_urb(serial->rx_urb[i]);
		/* free the RX buffer */
		kfree(serial->rx_data[i]);
	}

	/* unlink and free TX URB */
	usb_free_urb(serial->tx_urb);
	kfree(serial->tx_data);
}

static int hso_serial_common_create(struct hso_serial *serial, int num_urbs,
				    int rx_size, int tx_size)
{
	struct device *dev;
	int minor;
	int i;

	minor = get_free_serial_index();
	if (minor < 0)
		goto exit;

	/* register our minor number */
	serial->parent->dev = tty_register_device(tty_drv, minor,
					&serial->parent->interface->dev);
	dev = serial->parent->dev;
	dev_set_drvdata(dev, serial->parent);
	i = device_create_file(dev, &dev_attr_hsotype);

	/* fill in specific data for later use */
	serial->minor = minor;
	serial->magic = HSO_SERIAL_MAGIC;
	spin_lock_init(&serial->serial_lock);
	serial->num_rx_urbs = num_urbs;

	/* RX, allocate urb and initialize */

	/* prepare our RX buffer */
	serial->rx_data_length = rx_size;
	for (i = 0; i < serial->num_rx_urbs; i++) {
		serial->rx_urb[i] = usb_alloc_urb(0, GFP_KERNEL);
		if (!serial->rx_urb[i]) {
			dev_err(dev, "Could not allocate urb?\n");
			goto exit;
		}
		serial->rx_urb[i]->transfer_buffer = NULL;
		serial->rx_urb[i]->transfer_buffer_length = 0;
		serial->rx_data[i] = kzalloc(serial->rx_data_length,
					     GFP_KERNEL);
		if (!serial->rx_data[i]) {
			dev_err(dev, "%s - Out of memory\n", __func__);
			goto exit;
		}
	}

	/* TX, allocate urb and initialize */
	serial->tx_urb = usb_alloc_urb(0, GFP_KERNEL);
	if (!serial->tx_urb) {
		dev_err(dev, "Could not allocate urb?\n");
		goto exit;
	}
	serial->tx_urb->transfer_buffer = NULL;
	serial->tx_urb->transfer_buffer_length = 0;
	/* prepare our TX buffer */
	serial->tx_data_count = 0;
	serial->tx_buffer_count = 0;
	serial->tx_data_length = tx_size;
	serial->tx_data = kzalloc(serial->tx_data_length, GFP_KERNEL);
	if (!serial->tx_data) {
		dev_err(dev, "%s - Out of memory\n", __func__);
		goto exit;
	}
	serial->tx_buffer = kzalloc(serial->tx_data_length, GFP_KERNEL);
	if (!serial->tx_buffer) {
		dev_err(dev, "%s - Out of memory\n", __func__);
		goto exit;
	}

	return 0;
exit:
	hso_serial_common_free(serial);
	return -1;
}

/* Creates a general hso device */
static struct hso_device *hso_create_device(struct usb_interface *intf,
					    int port_spec)
{
	struct hso_device *hso_dev;

	hso_dev = kzalloc(sizeof(*hso_dev), GFP_ATOMIC);
	if (!hso_dev)
		return NULL;

	hso_dev->port_spec = port_spec;
	hso_dev->usb = interface_to_usbdev(intf);
	hso_dev->interface = intf;
	kref_init(&hso_dev->ref);
	mutex_init(&hso_dev->mutex);

	INIT_WORK(&hso_dev->async_get_intf, async_get_intf);
	INIT_WORK(&hso_dev->async_put_intf, async_put_intf);
	INIT_WORK(&hso_dev->reset_device, reset_device);

	return hso_dev;
}

/* Removes a network device in the network device table */
static int remove_net_device(struct hso_device *hso_dev)
{
	int i;

	for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
		if (network_table[i] == hso_dev) {
			network_table[i] = NULL;
			break;
		}
	}
	if (i == HSO_MAX_NET_DEVICES)
		return -1;
	return 0;
}

/* Frees our network device */
static void hso_free_net_device(struct hso_device *hso_dev)
{
	int i;
	struct hso_net *hso_net = dev2net(hso_dev);

	if (!hso_net)
		return;

	remove_net_device(hso_net->parent);

	if (hso_net->net) {
		unregister_netdev(hso_net->net);
		free_netdev(hso_net->net);
	}

	/* start freeing */
	for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) {
		usb_free_urb(hso_net->mux_bulk_rx_urb_pool[i]);
		kfree(hso_net->mux_bulk_rx_buf_pool[i]);
		hso_net->mux_bulk_rx_buf_pool[i] = NULL;
	}
	usb_free_urb(hso_net->mux_bulk_tx_urb);
	kfree(hso_net->mux_bulk_tx_buf);
	hso_net->mux_bulk_tx_buf = NULL;

	kfree(hso_dev);
}

static const struct net_device_ops hso_netdev_ops = {
	.ndo_open	= hso_net_open,
	.ndo_stop	= hso_net_close,
	.ndo_start_xmit = hso_net_start_xmit,
	.ndo_tx_timeout = hso_net_tx_timeout,
};

/* initialize the network interface */
static void hso_net_init(struct net_device *net)
{
	struct hso_net *hso_net = netdev_priv(net);

	D1("sizeof hso_net is %d", (int)sizeof(*hso_net));

	/* fill in the other fields */
	net->netdev_ops = &hso_netdev_ops;
	net->watchdog_timeo = HSO_NET_TX_TIMEOUT;
	net->flags = IFF_POINTOPOINT | IFF_NOARP | IFF_MULTICAST;
	net->type = ARPHRD_NONE;
	net->mtu = DEFAULT_MTU - 14;
	net->tx_queue_len = 10;
	SET_ETHTOOL_OPS(net, &ops);

	/* and initialize the semaphore */
	spin_lock_init(&hso_net->net_lock);
}

/* Adds a network device in the network device table */
static int add_net_device(struct hso_device *hso_dev)
{
	int i;

	for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
		if (network_table[i] == NULL) {
			network_table[i] = hso_dev;
			break;
		}
	}
	if (i == HSO_MAX_NET_DEVICES)
		return -1;
	return 0;
}

static int hso_rfkill_set_block(void *data, bool blocked)
{
	struct hso_device *hso_dev = data;
	int enabled = !blocked;
	int rv;

	mutex_lock(&hso_dev->mutex);
	if (hso_dev->usb_gone)
		rv = 0;
	else
		rv = usb_control_msg(hso_dev->usb, usb_rcvctrlpipe(hso_dev->usb, 0),
				       enabled ? 0x82 : 0x81, 0x40, 0, 0, NULL, 0,
				       USB_CTRL_SET_TIMEOUT);
	mutex_unlock(&hso_dev->mutex);
	return rv;
}

static const struct rfkill_ops hso_rfkill_ops = {
	.set_block = hso_rfkill_set_block,
};

/* Creates and sets up everything for rfkill */
static void hso_create_rfkill(struct hso_device *hso_dev,
			     struct usb_interface *interface)
{
	struct hso_net *hso_net = dev2net(hso_dev);
	struct device *dev = &hso_net->net->dev;
	char *rfkn;

	rfkn = kzalloc(20, GFP_KERNEL);
	if (!rfkn)
		dev_err(dev, "%s - Out of memory\n", __func__);

	snprintf(rfkn, 20, "hso-%d",
		 interface->altsetting->desc.bInterfaceNumber);

	hso_net->rfkill = rfkill_alloc(rfkn,
				       &interface_to_usbdev(interface)->dev,
				       RFKILL_TYPE_WWAN,
				       &hso_rfkill_ops, hso_dev);
	if (!hso_net->rfkill) {
		dev_err(dev, "%s - Out of memory\n", __func__);
		kfree(rfkn);
		return;
	}
	if (rfkill_register(hso_net->rfkill) < 0) {
		rfkill_destroy(hso_net->rfkill);
		kfree(rfkn);
		hso_net->rfkill = NULL;
		dev_err(dev, "%s - Failed to register rfkill\n", __func__);
		return;
	}
}

static struct device_type hso_type = {
	.name	= "wwan",
};

/* Creates our network device */
static struct hso_device *hso_create_net_device(struct usb_interface *interface,
						int port_spec)
{
	int result, i;
	struct net_device *net;
	struct hso_net *hso_net;
	struct hso_device *hso_dev;

	hso_dev = hso_create_device(interface, port_spec);
	if (!hso_dev)
		return NULL;

	/* allocate our network device, then we can put in our private data */
	/* call hso_net_init to do the basic initialization */
	net = alloc_netdev(sizeof(struct hso_net), "hso%d", hso_net_init);
	if (!net) {
		dev_err(&interface->dev, "Unable to create ethernet device\n");
		goto exit;
	}

	hso_net = netdev_priv(net);

	hso_dev->port_data.dev_net = hso_net;
	hso_net->net = net;
	hso_net->parent = hso_dev;

	hso_net->in_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK,
				      USB_DIR_IN);
	if (!hso_net->in_endp) {
		dev_err(&interface->dev, "Can't find BULK IN endpoint\n");
		goto exit;
	}
	hso_net->out_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK,
				       USB_DIR_OUT);
	if (!hso_net->out_endp) {
		dev_err(&interface->dev, "Can't find BULK OUT endpoint\n");
		goto exit;
	}
	SET_NETDEV_DEV(net, &interface->dev);
	SET_NETDEV_DEVTYPE(net, &hso_type);

	/* registering our net device */
	result = register_netdev(net);
	if (result) {
		dev_err(&interface->dev, "Failed to register device\n");
		goto exit;
	}

	/* start allocating */
	for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) {
		hso_net->mux_bulk_rx_urb_pool[i] = usb_alloc_urb(0, GFP_KERNEL);
		if (!hso_net->mux_bulk_rx_urb_pool[i]) {
			dev_err(&interface->dev, "Could not allocate rx urb\n");
			goto exit;
		}
		hso_net->mux_bulk_rx_buf_pool[i] = kzalloc(MUX_BULK_RX_BUF_SIZE,
							   GFP_KERNEL);
		if (!hso_net->mux_bulk_rx_buf_pool[i]) {
			dev_err(&interface->dev, "Could not allocate rx buf\n");
			goto exit;
		}
	}
	hso_net->mux_bulk_tx_urb = usb_alloc_urb(0, GFP_KERNEL);
	if (!hso_net->mux_bulk_tx_urb) {
		dev_err(&interface->dev, "Could not allocate tx urb\n");
		goto exit;
	}
	hso_net->mux_bulk_tx_buf = kzalloc(MUX_BULK_TX_BUF_SIZE, GFP_KERNEL);
	if (!hso_net->mux_bulk_tx_buf) {
		dev_err(&interface->dev, "Could not allocate tx buf\n");
		goto exit;
	}

	add_net_device(hso_dev);

	hso_log_port(hso_dev);

	hso_create_rfkill(hso_dev, interface);

	return hso_dev;
exit:
	hso_free_net_device(hso_dev);
	return NULL;
}

static void hso_free_tiomget(struct hso_serial *serial)
{
	struct hso_tiocmget *tiocmget;
	if (!serial)
		return;
	tiocmget = serial->tiocmget;
	if (tiocmget) {
		usb_free_urb(tiocmget->urb);
		tiocmget->urb = NULL;
		serial->tiocmget = NULL;
		kfree(tiocmget);
	}
}

/* Frees an AT channel ( goes for both mux and non-mux ) */
static void hso_free_serial_device(struct hso_device *hso_dev)
{
	struct hso_serial *serial = dev2ser(hso_dev);

	if (!serial)
		return;
	set_serial_by_index(serial->minor, NULL);

	hso_serial_common_free(serial);

	if (serial->shared_int) {
		mutex_lock(&serial->shared_int->shared_int_lock);
		if (--serial->shared_int->ref_count == 0)
			hso_free_shared_int(serial->shared_int);
		else
			mutex_unlock(&serial->shared_int->shared_int_lock);
	}
	hso_free_tiomget(serial);
	kfree(serial);
	kfree(hso_dev);
}

/* Creates a bulk AT channel */
static struct hso_device *hso_create_bulk_serial_device(
			struct usb_interface *interface, int port)
{
	struct hso_device *hso_dev;
	struct hso_serial *serial;
	int num_urbs;
	struct hso_tiocmget *tiocmget;

	hso_dev = hso_create_device(interface, port);
	if (!hso_dev)
		return NULL;

	serial = kzalloc(sizeof(*serial), GFP_KERNEL);
	if (!serial)
		goto exit;

	serial->parent = hso_dev;
	hso_dev->port_data.dev_serial = serial;

	if ((port & HSO_PORT_MASK) == HSO_PORT_MODEM) {
		num_urbs = 2;
		serial->tiocmget = kzalloc(sizeof(struct hso_tiocmget),
					   GFP_KERNEL);
		/* it isn't going to break our heart if serial->tiocmget
		 *  allocation fails don't bother checking this.
		 */
		if (serial->tiocmget) {
			tiocmget = serial->tiocmget;
			tiocmget->urb = usb_alloc_urb(0, GFP_KERNEL);
			if (tiocmget->urb) {
				mutex_init(&tiocmget->mutex);
				init_waitqueue_head(&tiocmget->waitq);
				tiocmget->endp = hso_get_ep(
					interface,
					USB_ENDPOINT_XFER_INT,
					USB_DIR_IN);
			} else
				hso_free_tiomget(serial);
		}
	}
	else
		num_urbs = 1;

	if (hso_serial_common_create(serial, num_urbs, BULK_URB_RX_SIZE,
				     BULK_URB_TX_SIZE))
		goto exit;

	serial->in_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK,
				     USB_DIR_IN);
	if (!serial->in_endp) {
		dev_err(&interface->dev, "Failed to find BULK IN ep\n");
		goto exit2;
	}

	if (!
	    (serial->out_endp =
	     hso_get_ep(interface, USB_ENDPOINT_XFER_BULK, USB_DIR_OUT))) {
		dev_err(&interface->dev, "Failed to find BULK IN ep\n");
		goto exit2;
	}

	serial->write_data = hso_std_serial_write_data;

	/* and record this serial */
	set_serial_by_index(serial->minor, serial);

	/* setup the proc dirs and files if needed */
	hso_log_port(hso_dev);

	/* done, return it */
	return hso_dev;

exit2:
	hso_serial_common_free(serial);
exit:
	hso_free_tiomget(serial);
	kfree(serial);
	kfree(hso_dev);
	return NULL;
}

/* Creates a multiplexed AT channel */
static
struct hso_device *hso_create_mux_serial_device(struct usb_interface *interface,
						int port,
						struct hso_shared_int *mux)
{
	struct hso_device *hso_dev;
	struct hso_serial *serial;
	int port_spec;

	port_spec = HSO_INTF_MUX;
	port_spec &= ~HSO_PORT_MASK;

	port_spec |= hso_mux_to_port(port);
	if ((port_spec & HSO_PORT_MASK) == HSO_PORT_NO_PORT)
		return NULL;

	hso_dev = hso_create_device(interface, port_spec);
	if (!hso_dev)
		return NULL;

	serial = kzalloc(sizeof(*serial), GFP_KERNEL);
	if (!serial)
		goto exit;

	hso_dev->port_data.dev_serial = serial;
	serial->parent = hso_dev;

	if (hso_serial_common_create
	    (serial, 1, CTRL_URB_RX_SIZE, CTRL_URB_TX_SIZE))
		goto exit;

	serial->tx_data_length--;
	serial->write_data = hso_mux_serial_write_data;

	serial->shared_int = mux;
	mutex_lock(&serial->shared_int->shared_int_lock);
	serial->shared_int->ref_count++;
	mutex_unlock(&serial->shared_int->shared_int_lock);

	/* and record this serial */
	set_serial_by_index(serial->minor, serial);

	/* setup the proc dirs and files if needed */
	hso_log_port(hso_dev);

	/* done, return it */
	return hso_dev;

exit:
	if (serial) {
		tty_unregister_device(tty_drv, serial->minor);
		kfree(serial);
	}
	if (hso_dev)
		kfree(hso_dev);
	return NULL;

}

static void hso_free_shared_int(struct hso_shared_int *mux)
{
	usb_free_urb(mux->shared_intr_urb);
	kfree(mux->shared_intr_buf);
	mutex_unlock(&mux->shared_int_lock);
	kfree(mux);
}

static
struct hso_shared_int *hso_create_shared_int(struct usb_interface *interface)
{
	struct hso_shared_int *mux = kzalloc(sizeof(*mux), GFP_KERNEL);

	if (!mux)
		return NULL;

	mux->intr_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_INT,
				    USB_DIR_IN);
	if (!mux->intr_endp) {
		dev_err(&interface->dev, "Can't find INT IN endpoint\n");
		goto exit;
	}

	mux->shared_intr_urb = usb_alloc_urb(0, GFP_KERNEL);
	if (!mux->shared_intr_urb) {
		dev_err(&interface->dev, "Could not allocate intr urb?\n");
		goto exit;
	}
	mux->shared_intr_buf =
		kzalloc(le16_to_cpu(mux->intr_endp->wMaxPacketSize),
			GFP_KERNEL);
	if (!mux->shared_intr_buf) {
		dev_err(&interface->dev, "Could not allocate intr buf?\n");
		goto exit;
	}

	mutex_init(&mux->shared_int_lock);

	return mux;

exit:
	kfree(mux->shared_intr_buf);
	usb_free_urb(mux->shared_intr_urb);
	kfree(mux);
	return NULL;
}

/* Gets the port spec for a certain interface */
static int hso_get_config_data(struct usb_interface *interface)
{
	struct usb_device *usbdev = interface_to_usbdev(interface);
	u8 config_data[17];
	u32 if_num = interface->altsetting->desc.bInterfaceNumber;
	s32 result;

	if (usb_control_msg(usbdev, usb_rcvctrlpipe(usbdev, 0),
			    0x86, 0xC0, 0, 0, config_data, 17,
			    USB_CTRL_SET_TIMEOUT) != 0x11) {
		return -EIO;
	}

	switch (config_data[if_num]) {
	case 0x0:
		result = 0;
		break;
	case 0x1:
		result = HSO_PORT_DIAG;
		break;
	case 0x2:
		result = HSO_PORT_GPS;
		break;
	case 0x3:
		result = HSO_PORT_GPS_CONTROL;
		break;
	case 0x4:
		result = HSO_PORT_APP;
		break;
	case 0x5:
		result = HSO_PORT_APP2;
		break;
	case 0x6:
		result = HSO_PORT_CONTROL;
		break;
	case 0x7:
		result = HSO_PORT_NETWORK;
		break;
	case 0x8:
		result = HSO_PORT_MODEM;
		break;
	case 0x9:
		result = HSO_PORT_MSD;
		break;
	case 0xa:
		result = HSO_PORT_PCSC;
		break;
	case 0xb:
		result = HSO_PORT_VOICE;
		break;
	default:
		result = 0;
	}

	if (result)
		result |= HSO_INTF_BULK;

	if (config_data[16] & 0x1)
		result |= HSO_INFO_CRC_BUG;

	return result;
}

/* called once for each interface upon device insertion */
static int hso_probe(struct usb_interface *interface,
		     const struct usb_device_id *id)
{
	int mux, i, if_num, port_spec;
	unsigned char port_mask;
	struct hso_device *hso_dev = NULL;
	struct hso_shared_int *shared_int;
	struct hso_device *tmp_dev = NULL;

	if_num = interface->altsetting->desc.bInterfaceNumber;

	/* Get the interface/port specification from either driver_info or from
	 * the device itself */
	if (id->driver_info)
		port_spec = ((u32 *)(id->driver_info))[if_num];
	else
		port_spec = hso_get_config_data(interface);

	if (interface->cur_altsetting->desc.bInterfaceClass != 0xFF) {
		dev_err(&interface->dev, "Not our interface\n");
		return -ENODEV;
	}
	/* Check if we need to switch to alt interfaces prior to port
	 * configuration */
	if (interface->num_altsetting > 1)
		usb_set_interface(interface_to_usbdev(interface), if_num, 1);
	interface->needs_remote_wakeup = 1;

	/* Allocate new hso device(s) */
	switch (port_spec & HSO_INTF_MASK) {
	case HSO_INTF_MUX:
		if ((port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK) {
			/* Create the network device */
			if (!disable_net) {
				hso_dev = hso_create_net_device(interface,
								port_spec);
				if (!hso_dev)
					goto exit;
				tmp_dev = hso_dev;
			}
		}

		if (hso_get_mux_ports(interface, &port_mask))
			/* TODO: de-allocate everything */
			goto exit;

		shared_int = hso_create_shared_int(interface);
		if (!shared_int)
			goto exit;

		for (i = 1, mux = 0; i < 0x100; i = i << 1, mux++) {
			if (port_mask & i) {
				hso_dev = hso_create_mux_serial_device(
						interface, i, shared_int);
				if (!hso_dev)
					goto exit;
			}
		}

		if (tmp_dev)
			hso_dev = tmp_dev;
		break;

	case HSO_INTF_BULK:
		/* It's a regular bulk interface */
		if ((port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK) {
			if (!disable_net)
				hso_dev =
				    hso_create_net_device(interface, port_spec);
		} else {
			hso_dev =
			    hso_create_bulk_serial_device(interface, port_spec);
		}
		if (!hso_dev)
			goto exit;
		break;
	default:
		goto exit;
	}

	/* save our data pointer in this device */
	usb_set_intfdata(interface, hso_dev);

	/* done */
	return 0;
exit:
	hso_free_interface(interface);
	return -ENODEV;
}

/* device removed, cleaning up */
static void hso_disconnect(struct usb_interface *interface)
{
	hso_free_interface(interface);

	/* remove reference of our private data */
	usb_set_intfdata(interface, NULL);
}

static void async_get_intf(struct work_struct *data)
{
	struct hso_device *hso_dev =
	    container_of(data, struct hso_device, async_get_intf);
	usb_autopm_get_interface(hso_dev->interface);
}

static void async_put_intf(struct work_struct *data)
{
	struct hso_device *hso_dev =
	    container_of(data, struct hso_device, async_put_intf);
	usb_autopm_put_interface(hso_dev->interface);
}

static int hso_get_activity(struct hso_device *hso_dev)
{
	if (hso_dev->usb->state == USB_STATE_SUSPENDED) {
		if (!hso_dev->is_active) {
			hso_dev->is_active = 1;
			schedule_work(&hso_dev->async_get_intf);
		}
	}

	if (hso_dev->usb->state != USB_STATE_CONFIGURED)
		return -EAGAIN;

	usb_mark_last_busy(hso_dev->usb);

	return 0;
}

static int hso_put_activity(struct hso_device *hso_dev)
{
	if (hso_dev->usb->state != USB_STATE_SUSPENDED) {
		if (hso_dev->is_active) {
			hso_dev->is_active = 0;
			schedule_work(&hso_dev->async_put_intf);
			return -EAGAIN;
		}
	}
	hso_dev->is_active = 0;
	return 0;
}

/* called by kernel when we need to suspend device */
static int hso_suspend(struct usb_interface *iface, pm_message_t message)
{
	int i, result;

	/* Stop all serial ports */
	for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) {
		if (serial_table[i] && (serial_table[i]->interface == iface)) {
			result = hso_stop_serial_device(serial_table[i]);
			if (result)
				goto out;
		}
	}

	/* Stop all network ports */
	for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
		if (network_table[i] &&
		    (network_table[i]->interface == iface)) {
			result = hso_stop_net_device(network_table[i]);
			if (result)
				goto out;
		}
	}

out:
	return 0;
}

/* called by kernel when we need to resume device */
static int hso_resume(struct usb_interface *iface)
{
	int i, result = 0;
	struct hso_net *hso_net;

	/* Start all serial ports */
	for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) {
		if (serial_table[i] && (serial_table[i]->interface == iface)) {
			if (dev2ser(serial_table[i])->open_count) {
				result =
				    hso_start_serial_device(serial_table[i], GFP_NOIO);
				hso_kick_transmit(dev2ser(serial_table[i]));
				if (result)
					goto out;
			}
		}
	}

	/* Start all network ports */
	for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
		if (network_table[i] &&
		    (network_table[i]->interface == iface)) {
			hso_net = dev2net(network_table[i]);
			if (hso_net->flags & IFF_UP) {
				/* First transmit any lingering data,
				   then restart the device. */
				if (hso_net->skb_tx_buf) {
					dev_dbg(&iface->dev,
						"Transmitting"
						" lingering data\n");
					hso_net_start_xmit(hso_net->skb_tx_buf,
							   hso_net->net);
					hso_net->skb_tx_buf = NULL;
				}
				result = hso_start_net_device(network_table[i]);
				if (result)
					goto out;
			}
		}
	}

out:
	return result;
}

static void reset_device(struct work_struct *data)
{
	struct hso_device *hso_dev =
	    container_of(data, struct hso_device, reset_device);
	struct usb_device *usb = hso_dev->usb;
	int result;

	if (hso_dev->usb_gone) {
		D1("No reset during disconnect\n");
	} else {
		result = usb_lock_device_for_reset(usb, hso_dev->interface);
		if (result < 0)
			D1("unable to lock device for reset: %d\n", result);
		else {
			usb_reset_device(usb);
			usb_unlock_device(usb);
		}
	}
}

static void hso_serial_ref_free(struct kref *ref)
{
	struct hso_device *hso_dev = container_of(ref, struct hso_device, ref);

	hso_free_serial_device(hso_dev);
}

static void hso_free_interface(struct usb_interface *interface)
{
	struct hso_serial *hso_dev;
	struct tty_struct *tty;
	int i;

	for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) {
		if (serial_table[i] &&
		    (serial_table[i]->interface == interface)) {
			hso_dev = dev2ser(serial_table[i]);
			spin_lock_irq(&hso_dev->serial_lock);
			tty = tty_kref_get(hso_dev->tty);
			spin_unlock_irq(&hso_dev->serial_lock);
			if (tty)
				tty_hangup(tty);
			mutex_lock(&hso_dev->parent->mutex);
			tty_kref_put(tty);
			hso_dev->parent->usb_gone = 1;
			mutex_unlock(&hso_dev->parent->mutex);
			kref_put(&serial_table[i]->ref, hso_serial_ref_free);
		}
	}

	for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
		if (network_table[i] &&
		    (network_table[i]->interface == interface)) {
			struct rfkill *rfk = dev2net(network_table[i])->rfkill;
			/* hso_stop_net_device doesn't stop the net queue since
			 * traffic needs to start it again when suspended */
			netif_stop_queue(dev2net(network_table[i])->net);
			hso_stop_net_device(network_table[i]);
			cancel_work_sync(&network_table[i]->async_put_intf);
			cancel_work_sync(&network_table[i]->async_get_intf);
			if (rfk) {
				rfkill_unregister(rfk);
				rfkill_destroy(rfk);
			}
			hso_free_net_device(network_table[i]);
		}
	}
}

/* Helper functions */

/* Get the endpoint ! */
static struct usb_endpoint_descriptor *hso_get_ep(struct usb_interface *intf,
						  int type, int dir)
{
	int i;
	struct usb_host_interface *iface = intf->cur_altsetting;
	struct usb_endpoint_descriptor *endp;

	for (i = 0; i < iface->desc.bNumEndpoints; i++) {
		endp = &iface->endpoint[i].desc;
		if (((endp->bEndpointAddress & USB_ENDPOINT_DIR_MASK) == dir) &&
		    (usb_endpoint_type(endp) == type))
			return endp;
	}