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path: root/kernel/auditfilter.c
AgeCommit message (Expand)Author
2012-10-12audit: optimize audit_compare_dname_pathJeff Layton
2012-10-12audit: make audit_compare_dname_path use parent_len helperEric Paris
2012-10-12audit: remove dirlen argument to audit_compare_dname_pathJeff Layton
2012-10-12audit: set the name_len in audit_inode for parent lookupsJeff Layton
2012-09-17userns: Convert the audit loginuid to be a kuidEric W. Biederman
2012-09-17audit: Add typespecific uid and gid comparatorsEric W. Biederman
2012-09-17audit: Remove the unused uid parameter from audit_receive_filterEric W. Biederman
2012-09-17audit: Use current instead of NETLINK_CREDS() in audit_filterEric W. Biederman
2012-01-17audit: allow interfield comparison in audit rulesEric Paris
2012-01-17audit: allow audit matching on inode gidEric Paris
2012-01-17audit: allow matching on obj_uidEric Paris
2012-01-17audit: reject entry,always rulesEric Paris
2012-01-17audit: make filetype matching consistent with other filtersEric Paris
2011-03-03netlink: kill loginuid/sessionid/sid members from struct netlink_skb_parmsPatrick McHardy
2010-10-30Audit: add support to match lsm labels on user audit messagesMiloslav Trmac
2010-07-28audit: do not get and put just to free a watchEric Paris
2010-07-28Audit: clean up the audit_watch splitEric Paris
2010-03-30include cleanup: Update gfp.h and slab.h includes to prepare for breaking imp...Tejun Heo
2009-06-24Audit: clean up all op= output to include string quotingEric Paris
2009-06-23Audit: move audit_get_nd completely into audit_watchEric Paris
2009-06-23audit: seperate audit inode watches into a subfileEric Paris
2009-06-23Audit: dereferencing krule as if it were an audit_watchEric Paris
2009-06-23Audit: fix audit watch use after freeEric Paris
2009-05-06inotify: use GFP_NOFS in kernel_event() to work around a lockdep false-positiveWu Fengguang
2009-04-05make the e->rule.xxx shorter in kernel auditfilter.cZhenwen Xu
2009-01-04audit: validate comparison operations, store them in sane formAl Viro
2009-01-04clean up audit_rule_{add,del} a bitAl Viro
2009-01-04audit rules ordering, part 2Al Viro
2009-01-04fixing audit rule ordering mess, part 1Al Viro
2009-01-04audit_update_lsm_rules() misses the audit_inode_hash[] onesAl Viro
2008-11-15Fix inotify watch removal/umount racesAl Viro
2008-08-01Re: [PATCH] the loginuid field should be output in all AUDIT_CONFIG_CHANGE au...zhangxiliang
2008-06-24[PATCH] remove useless argument type in audit_filter_user()Peng Haitao
2008-06-24[PATCH] audit: fix kernel-doc parameter notationRandy Dunlap
2008-04-29Merge branch 'audit.b50' of git://git.kernel.org/pub/scm/linux/kernel/git/vir...Linus Torvalds
2008-04-29Remove duplicated unlikely() in IS_ERR()Hirofumi Nakagawa
2008-04-28[PATCH] new predicate - AUDIT_FILETYPEAl Viro
2008-04-28[PATCH 2/2] audit: fix sparse shadowed variable warningsHarvey Harrison
2008-04-28[PATCH 1/2] audit: move extern declarations to audit.hHarvey Harrison
2008-04-28Audit: collect sessionid in netlink messagesEric Paris
2008-04-19Audit: Final renamings and cleanupAhmed S. Darwish
2008-04-19Audit: internally use the new LSM audit hooksAhmed S. Darwish
2008-04-19Audit: use new LSM hooks instead of SELinux exportsAhmed S. Darwish
2008-02-14Introduce path_put()Jan Blunck
2008-02-14Embed a struct path into struct nameidata instead of nd->{dentry,mnt}Jan Blunck
2008-02-01[AUDIT] make audit=0 really stop audit messagesEric Paris
2007-10-21[PATCH] audit: watching subtreesAl Viro
2007-10-18whitespace fixes: audit filteringDaniel Walker
2007-07-22[PATCH] allow audit filtering on bit & operationsEric Paris
2007-07-22[PATCH] audit: fix broken class-based syscall auditKlaus Weidner
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/*
 * Copyright (C) Overkiz SAS 2012
 *
 * Author: Boris BREZILLON <b.brezillon@overkiz.com>
 * License terms: GNU General Public License (GPL) version 2
 */

#include <linux/module.h>
#include <linux/init.h>
#include <linux/clocksource.h>
#include <linux/clockchips.h>
#include <linux/interrupt.h>
#include <linux/irq.h>

#include <linux/clk.h>
#include <linux/err.h>
#include <linux/ioport.h>
#include <linux/io.h>
#include <linux/platform_device.h>
#include <linux/atmel_tc.h>
#include <linux/pwm.h>
#include <linux/of_device.h>
#include <linux/slab.h>

#define NPWM	6

#define ATMEL_TC_ACMR_MASK	(ATMEL_TC_ACPA | ATMEL_TC_ACPC |	\
				 ATMEL_TC_AEEVT | ATMEL_TC_ASWTRG)

#define ATMEL_TC_BCMR_MASK	(ATMEL_TC_BCPB | ATMEL_TC_BCPC |	\
				 ATMEL_TC_BEEVT | ATMEL_TC_BSWTRG)

struct atmel_tcb_pwm_device {
	enum pwm_polarity polarity;	/* PWM polarity */
	unsigned div;			/* PWM clock divider */
	unsigned duty;			/* PWM duty expressed in clk cycles */
	unsigned period;		/* PWM period expressed in clk cycles */
};

struct atmel_tcb_pwm_chip {
	struct pwm_chip chip;
	spinlock_t lock;
	struct atmel_tc *tc;
	struct atmel_tcb_pwm_device *pwms[NPWM];
};

static inline struct atmel_tcb_pwm_chip *to_tcb_chip(struct pwm_chip *chip)
{
	return container_of(chip, struct atmel_tcb_pwm_chip, chip);
}

static int atmel_tcb_pwm_set_polarity(struct pwm_chip *chip,
				      struct pwm_device *pwm,
				      enum pwm_polarity polarity)
{
	struct atmel_tcb_pwm_device *tcbpwm = pwm_get_chip_data(pwm);

	tcbpwm->polarity = polarity;

	return 0;
}

static int atmel_tcb_pwm_request(struct pwm_chip *chip,
				 struct pwm_device *pwm)
{
	struct atmel_tcb_pwm_chip *tcbpwmc = to_tcb_chip(chip);
	struct atmel_tcb_pwm_device *tcbpwm;
	struct atmel_tc *tc = tcbpwmc->tc;
	void __iomem *regs = tc->regs;
	unsigned group = pwm->hwpwm / 2;
	unsigned index = pwm->hwpwm % 2;
	unsigned cmr;
	int ret;

	tcbpwm = devm_kzalloc(chip->dev, sizeof(*tcbpwm), GFP_KERNEL);
	if (!tcbpwm)
		return -ENOMEM;

	ret = clk_prepare_enable(tc->clk[group]);
	if (ret) {
		devm_kfree(chip->dev, tcbpwm);
		return ret;
	}

	pwm_set_chip_data(pwm, tcbpwm);
	tcbpwm->polarity = PWM_POLARITY_NORMAL;
	tcbpwm->duty = 0;
	tcbpwm->period = 0;
	tcbpwm->div = 0;

	spin_lock(&tcbpwmc->lock);
	cmr = __raw_readl(regs + ATMEL_TC_REG(group, CMR));
	/*
	 * Get init config from Timer Counter registers if
	 * Timer Counter is already configured as a PWM generator.
	 */
	if (cmr & ATMEL_TC_WAVE) {
		if (index == 0)
			tcbpwm->duty =
				__raw_readl(regs + ATMEL_TC_REG(group, RA));
		else
			tcbpwm->duty =
				__raw_readl(regs + ATMEL_TC_REG(group, RB));

		tcbpwm->div = cmr & ATMEL_TC_TCCLKS;
		tcbpwm->period = __raw_readl(regs + ATMEL_TC_REG(group, RC));
		cmr &= (ATMEL_TC_TCCLKS | ATMEL_TC_ACMR_MASK |
			ATMEL_TC_BCMR_MASK);
	} else
		cmr = 0;

	cmr |= ATMEL_TC_WAVE | ATMEL_TC_WAVESEL_UP_AUTO | ATMEL_TC_EEVT_XC0;
	__raw_writel(cmr, regs + ATMEL_TC_REG(group, CMR));
	spin_unlock(&tcbpwmc->lock);

	tcbpwmc->pwms[pwm->hwpwm] = tcbpwm;

	return 0;
}

static void atmel_tcb_pwm_free(struct pwm_chip *chip, struct pwm_device *pwm)
{
	struct atmel_tcb_pwm_chip *tcbpwmc = to_tcb_chip(chip);
	struct atmel_tcb_pwm_device *tcbpwm = pwm_get_chip_data(pwm);
	struct atmel_tc *tc = tcbpwmc->tc;

	clk_disable_unprepare(tc->clk[pwm->hwpwm / 2]);
	tcbpwmc->pwms[pwm->hwpwm] = NULL;
	devm_kfree(chip->dev, tcbpwm);
}

static void atmel_tcb_pwm_disable(struct pwm_chip *chip, struct pwm_device *pwm)
{
	struct atmel_tcb_pwm_chip *tcbpwmc = to_tcb_chip(chip);
	struct atmel_tcb_pwm_device *tcbpwm = pwm_get_chip_data(pwm);
	struct atmel_tc *tc = tcbpwmc->tc;
	void __iomem *regs = tc->regs;
	unsigned group = pwm->hwpwm / 2;
	unsigned index = pwm->hwpwm % 2;
	unsigned cmr;
	enum pwm_polarity polarity = tcbpwm->polarity;

	/*
	 * If duty is 0 the timer will be stopped and we have to
	 * configure the output correctly on software trigger:
	 *  - set output to high if PWM_POLARITY_INVERSED
	 *  - set output to low if PWM_POLARITY_NORMAL
	 *
	 * This is why we're reverting polarity in this case.
	 */
	if (tcbpwm->duty == 0)
		polarity = !polarity;

	spin_lock(&tcbpwmc->lock);
	cmr = __raw_readl(regs + ATMEL_TC_REG(group, CMR));

	/* flush old setting and set the new one */
	if (index == 0) {
		cmr &= ~ATMEL_TC_ACMR_MASK;
		if (polarity == PWM_POLARITY_INVERSED)
			cmr |= ATMEL_TC_ASWTRG_CLEAR;
		else
			cmr |= ATMEL_TC_ASWTRG_SET;
	} else {
		cmr &= ~ATMEL_TC_BCMR_MASK;
		if (polarity == PWM_POLARITY_INVERSED)
			cmr |= ATMEL_TC_BSWTRG_CLEAR;
		else
			cmr |= ATMEL_TC_BSWTRG_SET;
	}

	__raw_writel(cmr, regs + ATMEL_TC_REG(group, CMR));

	/*
	 * Use software trigger to apply the new setting.
	 * If both PWM devices in this group are disabled we stop the clock.
	 */
	if (!(cmr & (ATMEL_TC_ACPC | ATMEL_TC_BCPC)))
		__raw_writel(ATMEL_TC_SWTRG | ATMEL_TC_CLKDIS,
			     regs + ATMEL_TC_REG(group, CCR));
	else
		__raw_writel(ATMEL_TC_SWTRG, regs +
			     ATMEL_TC_REG(group, CCR));

	spin_unlock(&tcbpwmc->lock);
}

static int atmel_tcb_pwm_enable(struct pwm_chip *chip, struct pwm_device *pwm)
{
	struct atmel_tcb_pwm_chip *tcbpwmc = to_tcb_chip(chip);
	struct atmel_tcb_pwm_device *tcbpwm = pwm_get_chip_data(pwm);
	struct atmel_tc *tc = tcbpwmc->tc;
	void __iomem *regs = tc->regs;
	unsigned group = pwm->hwpwm / 2;
	unsigned index = pwm->hwpwm % 2;
	u32 cmr;
	enum pwm_polarity polarity = tcbpwm->polarity;

	/*
	 * If duty is 0 the timer will be stopped and we have to
	 * configure the output correctly on software trigger:
	 *  - set output to high if PWM_POLARITY_INVERSED
	 *  - set output to low if PWM_POLARITY_NORMAL
	 *
	 * This is why we're reverting polarity in this case.
	 */
	if (tcbpwm->duty == 0)
		polarity = !polarity;

	spin_lock(&tcbpwmc->lock);
	cmr = __raw_readl(regs + ATMEL_TC_REG(group, CMR));

	/* flush old setting and set the new one */
	cmr &= ~ATMEL_TC_TCCLKS;

	if (index == 0) {
		cmr &= ~ATMEL_TC_ACMR_MASK;

		/* Set CMR flags according to given polarity */
		if (polarity == PWM_POLARITY_INVERSED)
			cmr |= ATMEL_TC_ASWTRG_CLEAR;
		else
			cmr |= ATMEL_TC_ASWTRG_SET;
	} else {
		cmr &= ~ATMEL_TC_BCMR_MASK;
		if (polarity == PWM_POLARITY_INVERSED)
			cmr |= ATMEL_TC_BSWTRG_CLEAR;
		else
			cmr |= ATMEL_TC_BSWTRG_SET;
	}

	/*
	 * If duty is 0 or equal to period there's no need to register
	 * a specific action on RA/RB and RC compare.
	 * The output will be configured on software trigger and keep
	 * this config till next config call.
	 */
	if (tcbpwm->duty != tcbpwm->period && tcbpwm->duty > 0) {
		if (index == 0) {
			if (polarity == PWM_POLARITY_INVERSED)
				cmr |= ATMEL_TC_ACPA_SET | ATMEL_TC_ACPC_CLEAR;
			else
				cmr |= ATMEL_TC_ACPA_CLEAR | ATMEL_TC_ACPC_SET;
		}