/*
 * ihcp_changes.h
 * changes and identification macro module for Linux 2.6.x
 * driver for PCI hardcopy boards
 * 
 * Tahoma Technology
 * (formerly Ikon Corporation)
 * 107 2nd Avenue North
 * Seattle, WA, USA 98109
 *
 * 206.728.6465
 * http://www.tahomatech.com
 * tahoma@tahomatech.com
 *
 * This code released under the GPL, and in the public domain
 * References to IKON left in place for compatibility and historical reasons
 *
 * Please send us code modifications and BUG reports
 */

#ifndef	IHCP_CHANGES_H
#define	IHCP_CHANGES_H

#ifdef	MODULE_DESCRIPTION
MODULE_DESCRIPTION("Tahoma Technology (formerly Ikon Corporation) Pci Hardcopy Driver - 2010.04.01 12:20");
#endif

#ifdef	MODULE_AUTHOR
MODULE_AUTHOR("Tahoma Technology (formerly Ikon Corporation) http://www.tahomatech.com");
#endif

#ifdef	MODULE_LICENSE
MODULE_LICENSE("GPL");
#endif

/*
 * TODO:
 *
 * 	go to cdev-style device registration, eventually go
 * 	to hotplug support
 *
 * date: 2010.04.01	files: ihcp_driver.c
 *
 * 	fix long-time bug: we were calling ihcp_set_board_defaults()
 * 	before setting the board strapping in the flags element of
 * 	unit structure.  this caused all boards to be initialized
 * 	as VPI-strapped, which caused Centronics-strapped boards to
 * 	de-assert SEL IN.  that caused some printers (laserjet 1200)
 * 	to fail to print.
 *
 * date: 2008.08.27	files: ihcp_driver.c, ihcp_var.h
 *
 * 	explicitly include fs.h
 *
 * 	unregister_chrdev always returned 0 and as of 2.6.23 is
 * 	void so don't check return value
 *
 * 	as of 2.6.24 new scatterlist access functions to allow
 * 	for scatterlist (page) chaining - so add version test
 * 	and macro for setting scatterlist entries
 *
 * 	we're not implementing chianing - if user really wants
 * 	more than a page of scatterlist we will ask kmalloc
 * 	for it and not use chaining (let kmalloc fail if not
 * 	sufficient contig memory)
 *
 * date: 2007.06.03	files: ihcp_driver.c, ikonex.c, ikonex.h,
 *			README.ihcp, ihcp_install-2.6
 *
 *	fix byte-order default restore after plx reset (plx doesn't
 *	set user bit after soft reset) we will now fully set to
 *	board's current mode, except after MASTER_CLEAR in which
 *	case it will be set to global default mode
 *	added (missing) byte order default to install script
 *
 *	go to newer ikonex.c, remove ikonex.h
 *
 *	remove dates from README.ihcp
 *
 * date: 2006.11.13	files: ihcp_var.h, ihcp_driver.c
 *
 *	add butt-ugly version check code to deal with new irq
 *	handler prototype (since kernel devs won't add flag) and
 *	find UTS_RELEASE in utsrelease.h and put it back in debug
 *	print
 *
 * date: 2006.10.30	files: all
 *
 *	fix bonehead #ifndef wrappers on all include files that
 *	only wrapped the #define, not the file !
 *
 *	new flags for request_irq() w/back up defines for older kernels
 *
 *	rename our homemade mutexes to fix collision w/new kernel ones
 *
 *	use compat and unlocked ioctl entries for mixed 32/64 systems
 *
 *	drop unused pt_regs arg in int handler (per 2.6.19-rcx kernels)
 *	w/back up define for older kernels
 *
 *	protect open() from unlikely race
 *
 *	remove UTS_RELEASE from debug print
 *
 *
 * date: 2005.10.31+	files: all
 *
 * 	Gather all change and date related comments and macros here.
 * 	Hopefully there will be fewer tracking errors.
 *
 * date: 2005.10.31	files: all
 *
 * 	change pci board id to id list to support both board types
 * 	
 *	changes to keep up w/kernel drift:
 *	pci_dma_sync_single --> pci_dma_sync_single_for_device
 *	pci_find_device --> pci_get_device (and pci_put_device)
 *
 *	general code clean-up and comment compaction
 *	some macros moved from _var.h to _reg.h to try to group
 *	hardware and software macros appropriately
 *
 *	new log print macros
 *
 *	convert ioctl *arg to u32 so size is the same for
 *	32 and 64 bit operation
 *
 *	use __u32 instead of int in ioctl defines to make sure
 *	size is 32 bits.  #include <linux/types.h> to pick up type
 *	for user apps.
 *
 * 	(install script)
 *	changed MAX_BOARDS default from 1 to 4 now that we check
 *	/proc/interrupts for actual boards atached
 *
 *	put owner, group and permission seting inside node creation
 *	loop so we can't change someone else's nodes by mistake
 *
 * date: 2005.03.20	files: ihcp_driver.c, ihcp_io.h, README.ihcp
 *
 * 	changed some types for x86_64 compatibility
 *
 * date: 2004.10.08	files: .c
 *
 * 	added owner to file_operations struct
 * 	added pci_disable_device to unload code
 *
 * date: 2004.08.27	files: .c & .h
 *
 * 	major modifications for 2.6 kernel
 *
 * 	kiobuf functionality brought inside driver to allow mapping
 * 	and pinning user buffer pages - since no longer supported
 * 	directly in kernel
 *
 * 	reorganized some code into helper functions
 *
 * date: 2002.08.01	files: all
 *
 * 	corrected use of kiobuf maplist to generate scatterlist to allow for
 * 	highmem enabled machines (up to 4G)
 *
 * 	added kernel copy buffer for case where machine is and kernel
 * 	are highmem, but kernel does not have new scatterlist capability
 * 	in this case, we will allocate a copy buffer at init time, and
 * 	stuff the kiobuf with its pages
 *
 *	changed max_phys to orders for allocation efficiency in case of
 *	copy buf
 *
 *	moved "software" macros from ihcp_reg.h to ihcp_var.h
 *
 *	got rid of MODINFOBANNER macro (using MODULE_... macros now)
 *
 * date: 2002.06.29-	files: ihcp_install
 *
 * 	assorted typos and thinkos
 *
 * 	corrected bug in include dir scan
 * 	removed linux-2.4 from include scan
 * 	IHCP_ENB_HIGHMEM=YES is now the default
 * 	added missing scatterlist.page support warning
 * 	in case of compile failure
 *
 * date: 2002.05.06	files: all
 *
 * 	attempt to autodetect some things in ihcp_install
 *
 * 	add MODULE_LICENSE, MODULE_AUTHOR, and MODULE_DESCRIPTION macros
 *
 * 	uses IHCP_[ALLOC|FREE]_KIOVEC macros to deal with RH7.2 (updated)
 * 	quirks - selected by IHCP_RH72PLUS flag in ihcp_reg.h
 *
 * 	use IHCP_SG_LINK macro to do .address or .page/.offset entry
 * 	of address into scatterlist - selected by IHCP_HIGHMEM flag in ihcp_reg.h
 *
 * 	if IHCP_USE_DMA_MASK is defined, sets pci_dma_mask to indicate board's DMA
 * 	addressing capabilities - for thoroughness - 32 bit should be default
 *
 * 	add flags to enable versioning if it has been enabled in the kernel
 * 	or force versioning on, or force it off
 *
 * 	move conditional variable/mutex structs to _var.h, for simplified
 * 	compilation and linking
 *
 *	use slab.h instead of malloc.h
 *
 * date: 2001.06.18	files: .c
 *
 * 	move pci_enable_device() prior to device resource accesses to try to
 *	keep non-x86 architectures happy
 *	requires 2.3/2.4 kernel
 *
 * date: 2000.08.30	files: .c, .h
 *
 * 	use readl and writel rather than direct de-reference (for non x86
 *	architectures) this change in ihcp_reg.h
 *	SA_SHIRQ rather than SA_INTERRUPT to allow sharing and int code
 *	interruption
 *	use time_before() when delaying to avoid jiffies wrap
 *	pci_enable_device()
 *
 * date: 2000.03.24	files: all
 *
 *	incorporated kiobuf mechanism for dma from user buffers
 *	to replace dma copy buffer used in older versions
 *	separated int level read from board and one read from
 *	pci_dev (so we can use the hardware level to restore
 *	board after en eeprom reload
 *	incorporated modified version of Kaz Kylheku's mutex stuff
 *	for SMP
 *	add IOPB macros to allow for possible byte lane swizzling to be
 *	dealt with in one place
 *	convert all IPLX accesses to PLX accesses - doing accesses via the
 *	ihcp space may have been allowing pre-fetch from plx registers
 *	disable address space 0 pre-fetch
 *	make int/cstat read in intr volatile
 *	start DMA in two steps to avoid PLX bug
 *	pause DMA after sleep in strategy
 *
 * date: 2000.03.13	files: all
 *
 * 	started working w/2.3.x
 *	new pci_dev definition required changes in the way we get
 *	base addresses
 *	changed file_ops struct initialization to use named fields
 *	changed wait_queue type and added initialization
 *
 * date: 2000.11.20	files: ihcp_install
 *
 * 	added -x test to load script line in rc.local
 *
 * date: 1999.11.11	files: all
 *
 * 	change the way we do plx config re-load to avoid possible
 *	future panic with bridge chips w/short bus timeouts
 *
 * date: 1999.10.02	files: all
 *
 * 	re-code for 2.2
 *	this version no longer compatible with earlier linux revs
 *
 * date: 1999.03.16	files: .c
 *
 * 	changed request_irq call to register node name rather than driver
 *	name with interrupt - so each board will have a unique int name
 *	(ihcp0, ihcp1, ... same as node name)
 *
 * date: 1999.01.05	files: all
 *
 * 	start of development - initial target Linux 2.0.35 (R.H. 5.1)
 */

#endif	/* IHCP_CHANGES_H */