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path: root/net/mac80211/tkip.c
AgeCommit message (Expand)Author
2020-01-15mac80211: Fix TKIP replay protection immediately after key setupJouni Malinen
2019-07-08Merge branch 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert...Linus Torvalds
2019-06-20net/mac80211: move WEP handling to ARC4 library interfaceArd Biesheuvel
2019-06-19treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500Thomas Gleixner
2016-02-24mac80211: move TKIP TX IVs to public part of key structEliad Peller
2013-12-18mac80211: fix checkpatch errorsWeilong Chen
2013-05-16mac80211: use just spin_lock() in ieee80211_get_tkip_p2k()Johannes Berg
2013-02-15mac80211: use spin_lock_bh() for TKIP lockJohannes Berg
2012-06-22mac80211: remove TKIP debugJohannes Berg
2012-06-05net: mac80211: Convert printk(KERN_DEBUG to pr_debugJoe Perches
2011-10-31net: Add export.h for EXPORT_SYMBOL/THIS_MODULE to non-modulesPaul Gortmaker
2011-07-15mac80211: allow driver access to TKIP RX P1KJohannes Berg
2011-07-08mac80211: allow driver to generate P1K for IV32Johannes Berg
2011-07-08mac80211: fix TKIP races, make API easier to useJohannes Berg
2011-04-04mac80211: remove the dependency on crypto_blkcipherFelix Fietkau
2010-07-08mac80211: remove wep dependencyJohn W. Linville
2010-01-22mac80211: pass vif and station to update_tkip_keyJohannes Berg
2010-01-19mac80211: move control.hw_key assignmentJohannes Berg
2009-12-22mac80211 : fix a race with update_tkip_keygregor kowski
2009-11-18mac80211: use fixed broadcast addressJohannes Berg
2009-05-06mac80211: add driver ops wrappersJohannes Berg
2008-10-27mac80211: convert to %pM away from print_macJohannes Berg
2008-09-15mac80211: share STA information with driverJohannes Berg
2008-06-27mac80211: Let drivers have access to TKIP key offets for TX and RX MICLuis R. Rodriguez
2008-06-27mac80211: rename TKIP debugging Kconfig symbolJohannes Berg
2008-06-14mac80211: tkip.c use a local struct tkip_ctx in ieee80211_get_tkip_keyHarvey Harrison
2008-06-14mac80211: tkip.c fold ieee80211_gen_rc4key into its one callerHarvey Harrison
2008-06-14mac80211: tkip.c consolidate tkip IV writing in helperHarvey Harrison
2008-05-21mac80211: tkip.c use struct tkip_ctx in phase 2 key mixingHarvey Harrison
2008-05-21mac80211: tkip.c use struct tkip_ctx in phase 1 key mixingHarvey Harrison
2008-05-21mac80211: add a struct to hold tkip contextHarvey Harrison
2008-05-21mac80211: add const, remove unused function, make one function staticHarvey Harrison
2008-05-14mac80211: tkip.c use kernel-provided infrastructureHarvey Harrison
2008-04-30mac80211: incorrect shift directionHarvey Harrison
2008-04-08mac80211: rename filesJohannes Berg
2008-03-25mac80211: allows driver to request a Phase 1 RX keyEmmanuel Grumbach
2008-03-25mac80211: get a TKIP phase key from skbEmmanuel Grumbach
2007-10-10[PATCH] mac80211: fix TKIP IV updateJohannes Berg
2007-10-10[NET]: Introduce and use print_mac() and DECLARE_MAC_BUF()Joe Perches
2007-10-10[MAC80211]: embed key conf in key, fix driver interfaceJohannes Berg
2007-05-05[MAC80211]: Add mac80211 wireless stack.Jiri Benc
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/*
 * LoCoMo keyboard driver for Linux-based ARM PDAs:
 * 	- SHARP Zaurus Collie (SL-5500)
 * 	- SHARP Zaurus Poodle (SL-5600)
 *
 * Copyright (c) 2005 John Lenz
 * Based on from xtkbd.c
 *
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
 *
 */

#include <linux/slab.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/input.h>
#include <linux/delay.h>
#include <linux/device.h>
#include <linux/interrupt.h>
#include <linux/ioport.h>

#include <asm/hardware/locomo.h>
#include <asm/irq.h>

MODULE_AUTHOR("John Lenz <lenz@cs.wisc.edu>");
MODULE_DESCRIPTION("LoCoMo keyboard driver");
MODULE_LICENSE("GPL");

#define LOCOMOKBD_NUMKEYS	128

#define KEY_ACTIVITY		KEY_F16
#define KEY_CONTACT		KEY_F18
#define KEY_CENTER		KEY_F15

static const unsigned char
locomokbd_keycode[LOCOMOKBD_NUMKEYS] = {
	0, KEY_ESC, KEY_ACTIVITY, 0, 0, 0, 0, 0, 0, 0,				/* 0 - 9 */
	0, 0, 0, 0, 0, 0, 0, KEY_MENU, KEY_HOME, KEY_CONTACT,			/* 10 - 19 */
	0, 0, 0, 0, 0, 0, 0, 0, 0, 0,						/* 20 - 29 */
	0, 0, 0, KEY_CENTER, 0, KEY_MAIL, 0, 0, 0, 0,				/* 30 - 39 */
	0, 0, 0, 0, 0, 0, 0, 0, 0, KEY_RIGHT,					/* 40 - 49 */
	KEY_UP, KEY_LEFT, 0, 0, KEY_P, 0, KEY_O, KEY_I, KEY_Y, KEY_T,		/* 50 - 59 */
	KEY_E, KEY_W, 0, 0, 0, 0, KEY_DOWN, KEY_ENTER, 0, 0,			/* 60 - 69 */
	KEY_BACKSPACE, 0, KEY_L, KEY_U, KEY_H, KEY_R, KEY_D, KEY_Q, 0, 0,	/* 70 - 79 */
	0, 0, 0, 0, 0, 0, KEY_ENTER, KEY_RIGHTSHIFT, KEY_K, KEY_J,		/* 80 - 89 */
	KEY_G, KEY_F, KEY_X, KEY_S, 0, 0, 0, 0, 0, 0,				/* 90 - 99 */
	0, 0, KEY_DOT, 0, KEY_COMMA, KEY_N, KEY_B, KEY_C, KEY_Z, KEY_A,		/* 100 - 109 */
	KEY_LEFTSHIFT, KEY_TAB, KEY_LEFTCTRL, 0, 0, 0, 0, 0, 0, 0,		/* 110 - 119 */
	KEY_M, KEY_SPACE, KEY_V, KEY_APOSTROPHE, KEY_SLASH, 0, 0, 0		/* 120 - 128 */
};

#define KB_ROWS			16
#define KB_COLS			8
#define KB_ROWMASK(r)		(1 << (r))
#define SCANCODE(c,r)		( ((c)<<4) + (r) + 1 )

#define KB_DELAY		8
#define SCAN_INTERVAL		(HZ/10)

struct locomokbd {
	unsigned char keycode[LOCOMOKBD_NUMKEYS];
	struct input_dev *input;
	char phys[32];

	unsigned long base;
	spinlock_t lock;

	struct timer_list timer;
	unsigned long suspend_jiffies;
	unsigned int count_cancel;
};

/* helper functions for reading the keyboard matrix */
static inline void locomokbd_charge_all(unsigned long membase)
{
	locomo_writel(0x00FF, membase + LOCOMO_KSC);
}

static inline void locomokbd_activate_all(unsigned long membase)
{
	unsigned long r;

	locomo_writel(0, membase + LOCOMO_KSC);
	r = locomo_readl(membase + LOCOMO_KIC);
	r &= 0xFEFF;
	locomo_writel(r, membase + LOCOMO_KIC);
}

static inline void locomokbd_activate_col(unsigned long membase, int col)
{
	unsigned short nset;
	unsigned short nbset;

	nset = 0xFF & ~(1 << col);
	nbset = (nset << 8) + nset;
	locomo_writel(nbset, membase + LOCOMO_KSC);
}

static inline void locomokbd_reset_col(unsigned long membase, int col)
{
	unsigned short nbset;

	nbset = ((0xFF & ~(1 << col)) << 8) + 0xFF;
	locomo_writel(nbset, membase + LOCOMO_KSC);
}

/*
 * The LoCoMo keyboard only generates interrupts when a key is pressed.
 * So when a key is pressed, we enable a timer.  This timer scans the
 * keyboard, and this is how we detect when the key is released.
 */

/* Scan the hardware keyboard and push any changes up through the input layer */
static void locomokbd_scankeyboard(struct locomokbd *locomokbd)
{
	unsigned int row, col, rowd;
	unsigned long flags;
	unsigned int num_pressed;
	unsigned long membase = locomokbd->base;

	spin_lock_irqsave(&locomokbd->lock, flags);

	locomokbd_charge_all(membase);

	num_pressed = 0;
	for (col = 0; col < KB_COLS; col++) {

		locomokbd_activate_col(membase, col);
		udelay(KB_DELAY);

		rowd = ~locomo_readl(membase + LOCOMO_KIB);
		for (row = 0; row < KB_ROWS; row++) {
			unsigned int scancode, pressed, key;

			scancode = SCANCODE(col, row);
			pressed = rowd & KB_ROWMASK(row);
			key = locomokbd->keycode[scancode];

			input_report_key(locomokbd->input, key, pressed);
			if (likely(!pressed))
				continue;

			num_pressed++;

			/* The "Cancel/ESC" key is labeled "On/Off" on
			 * Collie and Poodle and should suspend the device
			 * if it was pressed for more than a second. */
			if (unlikely(key == KEY_ESC)) {
				if (!time_after(jiffies,
					locomokbd->suspend_jiffies + HZ))
					continue;
				if (locomokbd->count_cancel++
					!= (HZ/SCAN_INTERVAL + 1))
					continue;
				input_event(locomokbd->input, EV_PWR,
					KEY_SUSPEND, 1);
				locomokbd->suspend_jiffies = jiffies;
			} else
				locomokbd->count_cancel = 0;
		}
		locomokbd_reset_col(membase, col);
	}
	locomokbd_activate_all(membase);

	input_sync(locomokbd->input);

	/* if any keys are pressed, enable the timer */
	if (num_pressed)
		mod_timer(&locomokbd->timer, jiffies + SCAN_INTERVAL);
	else
		locomokbd->count_cancel = 0;

	spin_unlock_irqrestore(&locomokbd->lock, flags);
}

/*
 * LoCoMo keyboard interrupt handler.
 */
static irqreturn_t locomokbd_interrupt(int irq, void *dev_id)
{
	struct locomokbd *locomokbd = dev_id;
	u16 r;

	r = locomo_readl(locomokbd->base + LOCOMO_KIC);
	if ((r & 0x0001) == 0)
		return IRQ_HANDLED;

	locomo_writel(r & ~0x0100, locomokbd->base + LOCOMO_KIC); /* Ack */

	/** wait chattering delay **/
	udelay(100);

	locomokbd_scankeyboard(locomokbd);
	return IRQ_HANDLED;
}

/*
 * LoCoMo timer checking for released keys
 */
static void locomokbd_timer_callback(struct timer_list *t)
{
	struct locomokbd *locomokbd = from_timer(locomokbd, t, timer);

	locomokbd_scankeyboard(locomokbd);
}

static int locomokbd_open(struct input_dev *dev)
{
	struct locomokbd *locomokbd = input_get_drvdata(dev);
	u16 r;
	
	r = locomo_readl(locomokbd->base + LOCOMO_KIC) | 0x0010;
	locomo_writel(r, locomokbd->base + LOCOMO_KIC);
	return 0;
}

static void locomokbd_close(struct input_dev *dev)
{
	struct locomokbd *locomokbd = input_get_drvdata(dev);
	u16 r;
	
	r = locomo_readl(locomokbd->base + LOCOMO_KIC) & ~0x0010;
	locomo_writel(r, locomokbd->base + LOCOMO_KIC);
}

static int locomokbd_probe(struct locomo_dev *dev)
{
	struct locomokbd *locomokbd;
	struct input_dev *input_dev;
	int i, err;

	locomokbd = kzalloc(sizeof(struct locomokbd), GFP_KERNEL);
	input_dev = input_allocate_device();
	if (!locomokbd || !input_dev) {
		err = -ENOMEM;
		goto err_free_mem;
	}

	/* try and claim memory region */
	if (!request_mem_region((unsigned long