/*
 * Apple Onboard Audio pmf GPIOs
 *
 * Copyright 2006 Johannes Berg <johannes@sipsolutions.net>
 *
 * GPL v2, can be found in COPYING.
 */

#include <linux/slab.h>
#include <asm/pmac_feature.h>
#include <asm/pmac_pfunc.h>
#include "../aoa.h"

#define PMF_GPIO(name, bit)					\
static void pmf_gpio_set_##name(struct gpio_runtime *rt, int on)\
{								\
	struct pmf_args args = { .count = 1, .u[0].v = !on };	\
	int rc;							\
							\
	if (unlikely(!rt)) return;				\
	rc = pmf_call_function(rt->node, #name "-mute", &args);	\
	if (rc && rc != -ENODEV)				\
		printk(KERN_WARNING "pmf_gpio_set_" #name	\
		" failed, rc: %d\n", rc);			\
	rt->implementation_private &= ~(1<<bit);		\
	rt->implementation_private |= (!!on << bit);		\
}								\
static int pmf_gpio_get_##name(struct gpio_runtime *rt)		\
{								\
	if (unlikely(!rt)) return 0;				\
	return (rt->implementation_private>>bit)&1;		\
}

PMF_GPIO(headphone, 0);
PMF_GPIO(amp, 1);
PMF_GPIO(lineout, 2);

static void pmf_gpio_set_hw_reset(struct gpio_runtime *rt, int on)
{
	struct pmf_args args = { .count = 1, .u[0].v = !!on };
	int rc;

	if (unlikely(!rt)) return;
	rc = pmf_call_function(rt->node, "hw-reset", &args);
	if (rc)
		printk(KERN_WARNING "pmf_gpio_set_hw_reset"
		       " failed, rc: %d\n", rc);
}

static void pmf_gpio_all_amps_off(struct gpio_runtime *rt)
{
	int saved;

	if (unlikely(!rt)) return;
	saved = rt->implementation_private;
	pmf_gpio_set_headphone(rt, 0);
	pmf_gpio_set_amp(rt, 0);
	pmf_gpio_set_lineout(rt, 0);
	rt->implementation_private = saved;
}

static void pmf_gpio_all_amps_restore(struct gpio_runtime *rt)
{
	int s;

	if (unlikely(!rt)) return;
	s = rt->implementation_private;
	pmf_gpio_set_headphone(rt, (s>>0)&1);
	pmf_gpio_set_amp(rt, (s>>1)&1);
	pmf_gpio_set_lineout(rt, (s>>2)&1);
}

static void pmf_handle_notify(struct work_struct *work)
{
	struct gpio_notification *notif =
		container_of(work, struct gpio_notification, work.work);

	mutex_lock(&notif->mutex);
	if (notif->notify)
		notif->notify(notif->data);
	mutex_unlock(&notif->mutex);
}

static void pmf_gpio_init(struct gpio_runtime *rt)
{
	pmf_gpio_all_amps_off(rt);
	rt->implementation_private = 0;
	INIT_DELAYED_WORK(&rt->headphone_notify.work, pmf_handle_notify);
	INIT_DELAYED_WORK(&rt->line_in_notify.work, pmf_handle_notify);
	INIT_DELAYED_WORK(&rt->line_out_notify.work, pmf_handle_notify);
	mutex_init(&rt->headphone_notify.mutex);
	mutex_init(&rt->line_in_notify.mutex);
	mutex_init(&rt->line_out_notify.mutex);
}

static void pmf_gpio_exit(struct gpio_runtime *rt)
{
	pmf_gpio_all_amps_off(rt);
	rt->implementation_private = 0;

	if (rt->headphone_notify.gpio_private)
		pmf_unregister_irq_client(rt->headphone_notify.gpio_private);
	if (rt->line_in_notify.gpio_private)
		pmf_unregister_irq_client(rt->line_in_notify.gpio_private);
	if (rt->line_out_notify.gpio_private)
		pmf_unregister_irq_client(rt->line_out_notify.gpio_private);

	/* make sure no work is pending before freeing
	 * all things */
	cancel_delayed_work_sync(&rt->headphone_notify.work);
	cancel_delayed_work_sync(&rt->line_in_notify.work);
	cancel_delayed_work_sync(&rt->line_out_notify.work);

	mutex_destroy(&rt->headphone_notify.mutex);
	mutex_destroy(&rt->line_in_notify.mutex);
	mutex_destroy(&rt->line_out_notify.mutex);

	kfree(rt->headphone_notify.gpio_private);
	kfree(rt->line_in_notify.gpio_private);
	kfree(rt->line_out_notify.gpio_private);
}

static void pmf_handle_notify_irq(void *data)
{
	struct gpio_notification *notif = data;

	schedule_delayed_work(&notif->work, 0);
}

static int pmf_set_notify(struct gpio_runtime *rt,
			  enum notify_type type,
			  notify_func_t notify,
			  void *data)
{
	struct gpio_notification *notif;
	notify_func_t old;
	struct pmf_irq_client *irq_client;
	char *name;
	int err = -EBUSY;

	switch (type) {
	case AOA_NOTIFY_HEADPHONE:
		notif = &rt->headphone_notify;
		name = "headphone-detect";
		break;
	case AOA_NOTIFY_LINE_IN:
		notif = &rt->line_in_notify;
		name = "linein-detect";
		break;
	case AOA_NOTIFY_LINE_OUT:
		notif = &rt->line_out_notify;
		name = "lineout-detect";
		break;
	default:
		return -EINVAL;
	}

	mutex_lock(&notif->mutex);

	old = notif->notify;

	if (!old && !notify) {
		err = 0;
		goto out_unlock;
	}

	if (old && notify) {
		if (old == notify && notif->data == data)
			err = 0;
		goto out_unlock;
	}

	if (old && !notify) {
		irq_client = notif->gpio_private;
		pmf_unregister_irq_client(irq_client);
		kfree(irq_client);
		notif->gpio_private = NULL;
	}
	if (!old && notify) {
		irq_client = kzalloc(sizeof(struct pmf_irq_client),
				     GFP_KERNEL);
		if (!irq_client) {
			err = -ENOMEM;
			goto out_unlock;
		}
		irq_client->data = notif;
		irq_client->handler = pmf_handle_notify_irq;
		irq_client->owner = THIS_MODULE;
		err = pmf_register_irq_client(rt->node,
					      name,
					      irq_client);
		if (err) {
			printk(KERN_ERR "snd-aoa: gpio layer failed to"
					" register %s irq (%d)\n", name, err);
			kfree(irq_client);
			goto out_unlock;
		}
		notif->gpio_private = irq_client;
	}
	notif->notify = notify;
	notif->data = data;

	err = 0;
 out_unlock:
	mutex_unlock(&notif->mutex);
	return err;
}

static int pmf_get_detect(struct gpio_runtime *rt,
			  enum notify_type type)
{
	char *name;
	int err = -EBUSY, ret;
	struct pmf_args args = { .count = 1, .u[0].p = &ret };

	switch (type) {
	case AOA_NOTIFY_HEADPHONE:
		name = "headphone-detect";
		break;
	case AOA_NOTIFY_LINE_IN:
		name = "linein-detect";
		break;
	case AOA_NOTIFY_LINE_OUT:
		name = "lineout-detect";
		break;
	default:
		return -EINVAL;
	}

	err = pmf_call_function(rt->node, name, &args);
	if (err)
		return err;
	return ret;
}

static struct gpio_methods methods = {
	.init			= pmf_gpio_init,
	.exit			= pmf_gpio_exit,
	.all_amps_off		= pmf_gpio_all_amps_off,
	.all_amps_restore	= pmf_gpio_all_amps_restore,
	.set_headphone		= pmf_gpio_set_headphone,
	.set_speakers		= pmf_gpio_set_amp,
	.set_lineout		= pmf_gpio_set_lineout,
	.set_hw_reset		= pmf_gpio_set_hw_reset,
	.get_headphone		= pmf_gpio_get_headphone,
	.get_speakers		= pmf_gpio_get_amp,
	.get_lineout		= pmf_gpio_get_lineout,
	.set_notify		= pmf_set_notify,
	.get_detect		= pmf_get_detect,
};

struct gpio_methods *pmf_gpio_methods = &methods;
EXPORT_SYMBOL_GPL(pmf_gpio_methods);
it was called,
but later was changed to destroy the thread after the tracer was finished,
and would not be created until the next instance of the tracer was
established. The code that initialized the affinity was only called on the
initial instantiation of the tracer. After that, it was not initialized, and
the previous affinity did not match the current newly created one, making
it appear that the user modified the thread's affinity when it did not, and
the thread failed to migrate again.

Cc: stable@vger.kernel.org
Fixes: 0330f7aa8ee6 ("tracing: Have hwlat trace migrate across tracing_cpumask CPUs")
Signed-off-by: Steven Rostedt (VMware) &lt;rostedt@goodmis.org&gt;
</div><div class='diffstat-header'><a href='/cgit.cgi/linux/net-next.git/diff/?id=79c6f448c8b79c321e4a1f31f98194e4f6b6cae7'>Diffstat</a> (limited to 'sound/soc/soc-devres.c')</div><table summary='diffstat' class='diffstat'>