linux.git/drivers/usb/input/hiddev.c, branch v2.6.20

HID: put usb_interface instead of usb_device into hid->dev to fix udevinfo breakage

2007-01-21T21:18:01+00:00

The commit 4916b3a57fc94664677d439b911b8aaf86c7ec23 introduced a
hid regression between 2.6.19 and 2.6.20-rc1. The device put in
input_dev->cdev is now of type usb_device instead of usb_interface.

Before:
> # readlink -f /sys/class/input/input6/event4/device
> /sys/devices/pci0000:00/0000:00:10.0/usb2/2-1/2-1:1.1
After:
> # readlink -f /sys/class/input/input3/event3/device
> /sys/devices/pci0000:00/0000:00:10.0/usb1/1-1

This causes breakage:
> # udevinfo -q all -n /dev/input/event3
> P: /class/input/input3/event3
> N: input/event3
> S: input/by-path/pci-1-1--event-
> E: ID_SERIAL=noserial
> E: ID_PATH=pci-1-1-

No ID_MODEL, ID_VENDOR, ID_REVISION, ID_TYPE etc etc.

Fix this by assigning the intf->dev into hid->dev, and fixing
all the users.

Signed-off-by: Anssi Hannula 
Signed-off-by: Jiri Kosina

[PATCH] Generic HID layer - input and event reporting

2006-12-08T18:43:17+00:00

hid_input_report() was needlessly USB-specific in USB HID. This patch
makes the function independent of HID implementation and fixes all
the current users. Bluetooth patches comply with this prototype.

Signed-off-by: Jiri Kosina 
Signed-off-by: Marcel Holtmann 
Cc: Dmitry Torokhov 
Signed-off-by: Greg Kroah-Hartman

[PATCH] Generic HID layer - USB API

2006-12-08T18:43:14+00:00

- 'dev' in struct hid_device changed from struct usb_device to
  struct device and fixed all the users
- renamed functions which are part of USB HID API from 'hid_*' to
  'usbhid_*'
- force feedback initialization moved from common part into USB-specific
  driver
- added usbhid.h header for USB HID API users
- removed USB-specific fields from struct hid_device and moved them
  to new usbhid_device, which is pointed to by hid_device->driver_data
- fixed all USB users to use this new structure

Signed-off-by: Jiri Kosina 
Signed-off-by: Marcel Holtmann 
Cc: Dmitry Torokhov 
Signed-off-by: Greg Kroah-Hartman

[PATCH] Generic HID layer - API

2006-12-08T18:43:12+00:00

- fixed generic API (added neccessary EXPORT_SYMBOL, fixed hid.h to provide correct
  prototypes)
- extended hid_device with open/close/event function pointers to driver-specific
  functions
- added driver specific driver_data to hid_device

Signed-off-by: Jiri Kosina 
Signed-off-by: Marcel Holtmann 
Cc: Dmitry Torokhov 
Signed-off-by: Greg Kroah-Hartman

[PATCH] Generic HID layer - code split

2006-12-08T18:43:01+00:00

The "big main" split of USB HID code into generic HID code and
USB-transport specific HID handling.

Signed-off-by: Jiri Kosina 
Signed-off-by: Marcel Holtmann 
Cc: Dmitry Torokhov 
Signed-off-by: Greg Kroah-Hartman

IRQ: Maintain regs pointer globally rather than passing to IRQ handlers

2006-10-05T14:10:12+00:00

Maintain a per-CPU global "struct pt_regs *" variable which can be used instead
of passing regs around manually through all ~1800 interrupt handlers in the
Linux kernel.

The regs pointer is used in few places, but it potentially costs both stack
space and code to pass it around.  On the FRV arch, removing the regs parameter
from all the genirq function results in a 20% speed up of the IRQ exit path
(ie: from leaving timer_interrupt() to leaving do_IRQ()).

Where appropriate, an arch may override the generic storage facility and do
something different with the variable.  On FRV, for instance, the address is
maintained in GR28 at all times inside the kernel as part of general exception
handling.

Having looked over the code, it appears that the parameter may be handed down
through up to twenty or so layers of functions.  Consider a USB character
device attached to a USB hub, attached to a USB controller that posts its
interrupts through a cascaded auxiliary interrupt controller.  A character
device driver may want to pass regs to the sysrq handler through the input
layer which adds another few layers of parameter passing.

I've build this code with allyesconfig for x86_64 and i386.  I've runtested the
main part of the code on FRV and i386, though I can't test most of the drivers.
I've also done partial conversion for powerpc and MIPS - these at least compile
with minimal configurations.

This will affect all archs.  Mostly the changes should be relatively easy.
Take do_IRQ(), store the regs pointer at the beginning, saving the old one:

	struct pt_regs *old_regs = set_irq_regs(regs);

And put the old one back at the end:

	set_irq_regs(old_regs);

Don't pass regs through to generic_handle_irq() or __do_IRQ().

In timer_interrupt(), this sort of change will be necessary:

	-	update_process_times(user_mode(regs));
	-	profile_tick(CPU_PROFILING, regs);
	+	update_process_times(user_mode(get_irq_regs()));
	+	profile_tick(CPU_PROFILING);

I'd like to move update_process_times()'s use of get_irq_regs() into itself,
except that i386, alone of the archs, uses something other than user_mode().

Some notes on the interrupt handling in the drivers:

 (*) input_dev() is now gone entirely.  The regs pointer is no longer stored in
     the input_dev struct.

 (*) finish_unlinks() in drivers/usb/host/ohci-q.c needs checking.  It does
     something different depending on whether it's been supplied with a regs
     pointer or not.

 (*) Various IRQ handler function pointers have been moved to type
     irq_handler_t.

Signed-Off-By: David Howells 
(cherry picked from 1b16e7ac850969f38b375e511e3fa2f474a33867 commit)

USB: Make file operations structs in drivers/usb const.

2006-09-27T18:58:52+00:00

Making structs const prevents accidental bugs and with the proper debug
options they're protected against corruption.

Signed-off-by: Luiz Fernando N. Capitulino 
Signed-off-by: Greg Kroah-Hartman

Input: hiddev - use standard list implementation

2006-07-19T05:09:10+00:00

Fixes Coverity #id 303

Signed-off-by: Dmitry Torokhov

Remove obsolete #include

2006-06-30T17:25:36+00:00

Signed-off-by: Jörn Engel 
Signed-off-by: Adrian Bunk

[PATCH] HID read busywait fix

2006-05-21T19:59:17+00:00

Make a read of a HID device block until data is available.  Without it, the
read goes into a busy-wait loop until data is available.

Cc: Greg KH 
Acked-by: Vojtech Pavlik 
Cc: Dmitry Torokhov 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds