2006-07-14 09:01:36 +08:00
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/*
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* drivers/usb/input/wacom.h
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*
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* USB Wacom Graphire and Wacom Intuos tablet support
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*
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* Copyright (c) 2000-2004 Vojtech Pavlik <vojtech@ucw.cz>
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* Copyright (c) 2000 Andreas Bach Aaen <abach@stofanet.dk>
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* Copyright (c) 2000 Clifford Wolf <clifford@clifford.at>
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* Copyright (c) 2000 Sam Mosel <sam.mosel@computer.org>
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* Copyright (c) 2000 James E. Blair <corvus@gnu.org>
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* Copyright (c) 2000 Daniel Egger <egger@suse.de>
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* Copyright (c) 2001 Frederic Lepied <flepied@mandrakesoft.com>
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* Copyright (c) 2004 Panagiotis Issaris <panagiotis.issaris@mech.kuleuven.ac.be>
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* Copyright (c) 2002-2006 Ping Cheng <pingc@wacom.com>
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*
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* ChangeLog:
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* v0.1 (vp) - Initial release
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* v0.2 (aba) - Support for all buttons / combinations
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* v0.3 (vp) - Support for Intuos added
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* v0.4 (sm) - Support for more Intuos models, menustrip
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* relative mode, proximity.
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* v0.5 (vp) - Big cleanup, nifty features removed,
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* they belong in userspace
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* v1.8 (vp) - Submit URB only when operating, moved to CVS,
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* use input_report_key instead of report_btn and
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* other cleanups
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* v1.11 (vp) - Add URB ->dev setting for new kernels
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* v1.11 (jb) - Add support for the 4D Mouse & Lens
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* v1.12 (de) - Add support for two more inking pen IDs
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* v1.14 (vp) - Use new USB device id probing scheme.
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* Fix Wacom Graphire mouse wheel
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* v1.18 (vp) - Fix mouse wheel direction
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* Make mouse relative
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* v1.20 (fl) - Report tool id for Intuos devices
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* - Multi tools support
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* - Corrected Intuos protocol decoding (airbrush, 4D mouse, lens cursor...)
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* - Add PL models support
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* - Fix Wacom Graphire mouse wheel again
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* v1.21 (vp) - Removed protocol descriptions
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* - Added MISC_SERIAL for tool serial numbers
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* (gb) - Identify version on module load.
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* v1.21.1 (fl) - added Graphire2 support
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* v1.21.2 (fl) - added Intuos2 support
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* - added all the PL ids
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* v1.21.3 (fl) - added another eraser id from Neil Okamoto
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* - added smooth filter for Graphire from Peri Hankey
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* - added PenPartner support from Olaf van Es
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* - new tool ids from Ole Martin Bjoerndalen
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* v1.29 (pc) - Add support for more tablets
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* - Fix pressure reporting
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* v1.30 (vp) - Merge 2.4 and 2.5 drivers
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* - Since 2.5 now has input_sync(), remove MSC_SERIAL abuse
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* - Cleanups here and there
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* v1.30.1 (pi) - Added Graphire3 support
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* v1.40 (pc) - Add support for several new devices, fix eraser reporting, ...
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* v1.43 (pc) - Added support for Cintiq 21UX
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* - Fixed a Graphire bug
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* - Merged wacom_intuos3_irq into wacom_intuos_irq
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* v1.44 (pc) - Added support for Graphire4, Cintiq 710, Intuos3 6x11, etc.
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* - Report Device IDs
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* v1.45 (pc) - Added support for DTF 521, Intuos3 12x12 and 12x19
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* - Minor data report fix
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* v1.46 (pc) - Split wacom.c into wacom_sys.c and wacom_wac.c,
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* - where wacom_sys.c deals with system specific code,
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* - and wacom_wac.c deals with Wacom specific code
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*/
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/*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*/
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#ifndef WACOM_H
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#define WACOM_H
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#include <linux/kernel.h>
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#include <linux/slab.h>
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/usb/input.h>
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#include <asm/unaligned.h>
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/*
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* Version Information
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*/
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#define DRIVER_VERSION "v1.46"
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#define DRIVER_AUTHOR "Vojtech Pavlik <vojtech@ucw.cz>"
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#define DRIVER_DESC "USB Wacom Graphire and Wacom Intuos tablet driver"
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#define DRIVER_LICENSE "GPL"
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MODULE_AUTHOR(DRIVER_AUTHOR);
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MODULE_DESCRIPTION(DRIVER_DESC);
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MODULE_LICENSE(DRIVER_LICENSE);
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#define USB_VENDOR_ID_WACOM 0x056a
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struct wacom {
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dma_addr_t data_dma;
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struct input_dev *dev;
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struct usb_device *usbdev;
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struct urb *irq;
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struct wacom_wac * wacom_wac;
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char phys[32];
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};
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struct wacom_combo {
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struct wacom * wacom;
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struct urb * urb;
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};
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extern int wacom_wac_irq(struct wacom_wac * wacom_wac, void * wcombo);
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IRQ: Maintain regs pointer globally rather than passing to IRQ handlers
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 <dhowells@redhat.com>
(cherry picked from 1b16e7ac850969f38b375e511e3fa2f474a33867 commit)
2006-10-05 21:55:46 +08:00
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extern void wacom_sys_irq(struct urb *urb);
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2006-07-14 09:01:36 +08:00
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extern void wacom_report_abs(void *wcombo, unsigned int abs_type, int abs_data);
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extern void wacom_report_rel(void *wcombo, unsigned int rel_type, int rel_data);
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extern void wacom_report_key(void *wcombo, unsigned int key_type, int key_data);
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extern void wacom_input_event(void *wcombo, unsigned int type, unsigned int code, int value);
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extern void wacom_input_sync(void *wcombo);
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extern void wacom_init_input_dev(struct input_dev *input_dev, struct wacom_wac *wacom_wac);
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extern void input_dev_g4(struct input_dev *input_dev, struct wacom_wac *wacom_wac);
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extern void input_dev_g(struct input_dev *input_dev, struct wacom_wac *wacom_wac);
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extern void input_dev_i3(struct input_dev *input_dev, struct wacom_wac *wacom_wac);
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extern void input_dev_i(struct input_dev *input_dev, struct wacom_wac *wacom_wac);
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extern void input_dev_pl(struct input_dev *input_dev, struct wacom_wac *wacom_wac);
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extern void input_dev_pt(struct input_dev *input_dev, struct wacom_wac *wacom_wac);
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extern __u16 wacom_le16_to_cpu(unsigned char *data);
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extern __u16 wacom_be16_to_cpu(unsigned char *data);
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extern struct wacom_features * get_wacom_feature(const struct usb_device_id *id);
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extern const struct usb_device_id * get_device_table(void);
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#endif
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