[deliverable/linux.git] / sound / aoa / core / snd-aoa-gpio-feature.c

/*
 * Apple Onboard Audio feature call GPIO control
 *
 * Copyright 2006 Johannes Berg <johannes@sipsolutions.net>
 *
 * GPL v2, can be found in COPYING.
 *
 * This file contains the GPIO control routines for 
 * direct (through feature calls) access to the GPIO
 * registers.
 */

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

/* TODO: these are 20 global variables
 * that aren't used on most machines...
 * Move them into a dynamically allocated
 * structure and use that.
 */

/* these are the GPIO numbers (register addresses as offsets into
 * the GPIO space) */
static int headphone_mute_gpio;
static int amp_mute_gpio;
static int lineout_mute_gpio;
static int hw_reset_gpio;
static int lineout_detect_gpio;
static int headphone_detect_gpio;
static int linein_detect_gpio;

/* see the SWITCH_GPIO macro */
static int headphone_mute_gpio_activestate;
static int amp_mute_gpio_activestate;
static int lineout_mute_gpio_activestate;
static int hw_reset_gpio_activestate;
static int lineout_detect_gpio_activestate;
static int headphone_detect_gpio_activestate;
static int linein_detect_gpio_activestate;

/* node pointers that we save when getting the GPIO number
 * to get the interrupt later */
static struct device_node *lineout_detect_node;
static struct device_node *linein_detect_node;
static struct device_node *headphone_detect_node;

static int lineout_detect_irq;
static int linein_detect_irq;
static int headphone_detect_irq;

static struct device_node *get_gpio(char *name,
				    char *altname,
				    int *gpioptr,
				    int *gpioactiveptr)
{
	struct device_node *np, *gpio;
	u32 *reg;
	const char *audio_gpio;

	*gpioptr = -1;

	/* check if we can get it the easy way ... */
	np = of_find_node_by_name(NULL, name);
	if (!np) {
		/* some machines have only gpioX/extint-gpioX nodes,
		 * and an audio-gpio property saying what it is ...
		 * So what we have to do is enumerate all children
		 * of the gpio node and check them all. */
		gpio = of_find_node_by_name(NULL, "gpio");
		if (!gpio)
			return NULL;
		while ((np = of_get_next_child(gpio, np))) {
			audio_gpio = get_property(np, "audio-gpio", NULL);
			if (!audio_gpio)
				continue;
			if (strcmp(audio_gpio, name) == 0)
				break;
			if (altname && (strcmp(audio_gpio, altname) == 0))
				break;
		}
		/* still not found, assume not there */
		if (!np)
			return NULL;
	}

	reg = (u32 *)get_property(np, "reg", NULL);
	if (!reg)
		return NULL;

	*gpioptr = *reg;

	/* this is a hack, usually the GPIOs 'reg' property
	 * should have the offset based from the GPIO space
	 * which is at 0x50, but apparently not always... */
	if (*gpioptr < 0x50)
		*gpioptr += 0x50;

	reg = (u32 *)get_property(np, "audio-gpio-active-state", NULL);
	if (!reg)
		/* Apple seems to default to 1, but
		 * that doesn't seem right at least on most
		 * machines. So until proven that the opposite
		 * is necessary, we default to 0
		 * (which, incidentally, snd-powermac also does...) */
		*gpioactiveptr = 0;
	else
		*gpioactiveptr = *reg;

	return np;
}

static void get_irq(struct device_node * np, int *irqptr)
{
	if (np)
		*irqptr = irq_of_parse_and_map(np, 0);
	else
		*irqptr = NO_IRQ;
}

/* 0x4 is outenable, 0x1 is out, thus 4 or 5 */
#define SWITCH_GPIO(name, v, on)				\
	(((v)&~1) | ((on)?					\
			(name##_gpio_activestate==0?4:5):	\
			(name##_gpio_activestate==0?5:4)))

#define FTR_GPIO(name, bit)					\
static void ftr_gpio_set_##name(struct gpio_runtime *rt, int on)\
{								\
	int v;							\
								\
	if (unlikely(!rt)) return;				\
								\
	if (name##_mute_gpio < 0)				\
		return;						\
								\
	v = pmac_call_feature(PMAC_FTR_READ_GPIO, NULL,		\
			      name##_mute_gpio,			\
			      0);				\
								\
	/* muted = !on... */					\
	v = SWITCH_GPIO(name##_mute, v, !on);			\
								\
	pmac_call_feature(PMAC_FTR_WRITE_GPIO, NULL,		\
			  name##_mute_gpio, v);			\
								\
	rt->implementation_private &= ~(1<<bit);		\
	rt->implementation_private |= (!!on << bit);		\
}								\
static int ftr_gpio_get_##name(struct gpio_runtime *rt)		\
{								\
	if (unlikely(!rt)) return 0;				\
	return (rt->implementation_private>>bit)&1;		\
}

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

static void ftr_gpio_set_hw_reset(struct gpio_runtime *rt, int on)
{
	int v;

	if (unlikely(!rt)) return;
	if (hw_reset_gpio < 0)
		return;

	v = pmac_call_feature(PMAC_FTR_READ_GPIO, NULL,
			      hw_reset_gpio, 0);
	v = SWITCH_GPIO(hw_reset, v, on);
	pmac_call_feature(PMAC_FTR_WRITE_GPIO, NULL,
			  hw_reset_gpio, v);
}

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

	if (unlikely(!rt)) return;
	saved = rt->implementation_private;
	ftr_gpio_set_headphone(rt, 0);
	ftr_gpio_set_amp(rt, 0);
	ftr_gpio_set_lineout(rt, 0);
	rt->implementation_private = saved;
}

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

	if (unlikely(!rt)) return;
	s = rt->implementation_private;
	ftr_gpio_set_headphone(rt, (s>>0)&1);
	ftr_gpio_set_amp(rt, (s>>1)&1);
	ftr_gpio_set_lineout(rt, (s>>2)&1);
}

static void ftr_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 gpio_enable_dual_edge(int gpio)
{
	int v;

	if (gpio == -1)
		return;
	v = pmac_call_feature(PMAC_FTR_READ_GPIO, NULL, gpio, 0);
	v |= 0x80; /* enable dual edge */
	pmac_call_feature(PMAC_FTR_WRITE_GPIO, NULL, gpio, v);
}

static void ftr_gpio_init(struct gpio_runtime *rt)
{
	get_gpio("headphone-mute", NULL,
		 &headphone_mute_gpio,
		 &headphone_mute_gpio_activestate);
	get_gpio("amp-mute", NULL,
		 &amp_mute_gpio,
		 &amp_mute_gpio_activestate);
	get_gpio("lineout-mute", NULL,
		 &lineout_mute_gpio,
		 &lineout_mute_gpio_activestate);
	get_gpio("hw-reset", "audio-hw-reset",
		 &hw_reset_gpio,
		 &hw_reset_gpio_activestate);

	headphone_detect_node = get_gpio("headphone-detect", NULL,
					 &headphone_detect_gpio,
					 &headphone_detect_gpio_activestate);
	/* go Apple, and thanks for giving these different names
	 * across the board... */
	lineout_detect_node = get_gpio("lineout-detect", "line-output-detect",
				       &lineout_detect_gpio,
				       &lineout_detect_gpio_activestate);
	linein_detect_node = get_gpio("linein-detect", "line-input-detect",
				      &linein_detect_gpio,
				      &linein_detect_gpio_activestate);

	gpio_enable_dual_edge(headphone_detect_gpio);
	gpio_enable_dual_edge(lineout_detect_gpio);
	gpio_enable_dual_edge(linein_detect_gpio);

	get_irq(headphone_detect_node, &headphone_detect_irq);
	get_irq(lineout_detect_node, &lineout_detect_irq);
	get_irq(linein_detect_node, &linein_detect_irq);

	ftr_gpio_all_amps_off(rt);
	rt->implementation_private = 0;
	INIT_DELAYED_WORK(&rt->headphone_notify.work, ftr_handle_notify);
	INIT_DELAYED_WORK(&rt->line_in_notify.work, ftr_handle_notify);
	INIT_DELAYED_WORK(&rt->line_out_notify.work, ftr_handle_notify);
	mutex_init(&rt->headphone_notify.mutex);
	mutex_init(&rt->line_in_notify.mutex);
	mutex_init(&rt->line_out_notify.mutex);
}

static void ftr_gpio_exit(struct gpio_runtime *rt)
{
	ftr_gpio_all_amps_off(rt);
	rt->implementation_private = 0;
	if (rt->headphone_notify.notify)
		free_irq(headphone_detect_irq, &rt->headphone_notify);
	if (rt->line_in_notify.gpio_private)
		free_irq(linein_detect_irq, &rt->line_in_notify);
	if (rt->line_out_notify.gpio_private)
		free_irq(lineout_detect_irq, &rt->line_out_notify);
	cancel_delayed_work(&rt->headphone_notify.work);
	cancel_delayed_work(&rt->line_in_notify.work);
	cancel_delayed_work(&rt->line_out_notify.work);
	flush_scheduled_work();
	mutex_destroy(&rt->headphone_notify.mutex);
	mutex_destroy(&rt->line_in_notify.mutex);
	mutex_destroy(&rt->line_out_notify.mutex);
}

static irqreturn_t ftr_handle_notify_irq(int xx, void *data)
{
	struct gpio_notification *notif = data;

	schedule_delayed_work(&notif->work, 0);

	return IRQ_HANDLED;
}

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

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

	if (irq == NO_IRQ)
		return -ENODEV;

	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)
		free_irq(irq, notif);

	if (!old && notify) {
		err = request_irq(irq, ftr_handle_notify_irq, 0, name, notif);
		if (err)
			goto out_unlock;
	}

	notif->notify = notify;
	notif->data = data;

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

static int ftr_get_detect(struct gpio_runtime *rt,
			  enum notify_type type)
{
	int gpio, ret, active;

	switch (type) {
	case AOA_NOTIFY_HEADPHONE:
		gpio = headphone_detect_gpio;
		active = headphone_detect_gpio_activestate;
		break;
	case AOA_NOTIFY_LINE_IN:
		gpio = linein_detect_gpio;
		active = linein_detect_gpio_activestate;
		break;
	case AOA_NOTIFY_LINE_OUT:
		gpio = lineout_detect_gpio;
		active = lineout_detect_gpio_activestate;
		break;
	default:
		return -EINVAL;
	}

	if (gpio == -1)
		return -ENODEV;

	ret = pmac_call_feature(PMAC_FTR_READ_GPIO, NULL, gpio, 0);
	if (ret < 0)
		return ret;
	return ((ret >> 1) & 1) == active;
}

static struct gpio_methods methods = {
	.init			= ftr_gpio_init,
	.exit			= ftr_gpio_exit,
	.all_amps_off		= ftr_gpio_all_amps_off,
	.all_amps_restore	= ftr_gpio_all_amps_restore,
	.set_headphone		= ftr_gpio_set_headphone,
	.set_speakers		= ftr_gpio_set_amp,
	.set_lineout		= ftr_gpio_set_lineout,
	.set_hw_reset		= ftr_gpio_set_hw_reset,
	.get_headphone		= ftr_gpio_get_headphone,
	.get_speakers		= ftr_gpio_get_amp,
	.get_lineout		= ftr_gpio_get_lineout,
	.set_notify		= ftr_set_notify,
	.get_detect		= ftr_get_detect,
};

struct gpio_methods *ftr_gpio_methods = &methods;
EXPORT_SYMBOL_GPL(ftr_gpio_methods);
Commit	Line	Data
f3d9478b JB	1	/*
	2	* Apple Onboard Audio feature call GPIO control
	3	*
	4	* Copyright 2006 Johannes Berg <johannes@sipsolutions.net>
	5	*
	6	* GPL v2, can be found in COPYING.
	7	*
	8	* This file contains the GPIO control routines for
	9	* direct (through feature calls) access to the GPIO
	10	* registers.
	11	*/
	12
	13	#include <asm/pmac_feature.h>
	14	#include <linux/interrupt.h>
	15	#include "../aoa.h"
	16
	17	/* TODO: these are 20 global variables
	18	* that aren't used on most machines...
	19	* Move them into a dynamically allocated
	20	* structure and use that.
	21	*/
	22
	23	/* these are the GPIO numbers (register addresses as offsets into
	24	* the GPIO space) */
	25	static int headphone_mute_gpio;
	26	static int amp_mute_gpio;
	27	static int lineout_mute_gpio;
	28	static int hw_reset_gpio;
	29	static int lineout_detect_gpio;
	30	static int headphone_detect_gpio;
	31	static int linein_detect_gpio;
	32
	33	/* see the SWITCH_GPIO macro */
	34	static int headphone_mute_gpio_activestate;
	35	static int amp_mute_gpio_activestate;
	36	static int lineout_mute_gpio_activestate;
	37	static int hw_reset_gpio_activestate;
	38	static int lineout_detect_gpio_activestate;
	39	static int headphone_detect_gpio_activestate;
	40	static int linein_detect_gpio_activestate;
	41
	42	/* node pointers that we save when getting the GPIO number
	43	* to get the interrupt later */
	44	static struct device_node *lineout_detect_node;
	45	static struct device_node *linein_detect_node;
	46	static struct device_node *headphone_detect_node;
	47
	48	static int lineout_detect_irq;
	49	static int linein_detect_irq;
	50	static int headphone_detect_irq;
	51
	52	static struct device_node get_gpio(char name,
	53	char *altname,
	54	int *gpioptr,
	55	int *gpioactiveptr)
	56	{
	57	struct device_node np, gpio;
	58	u32 *reg;
abddd185	59	const char *audio_gpio;
f3d9478b JB	60
	61	*gpioptr = -1;
	62
	63	/* check if we can get it the easy way ... */
	64	np = of_find_node_by_name(NULL, name);
	65	if (!np) {
	66	/* some machines have only gpioX/extint-gpioX nodes,
	67	* and an audio-gpio property saying what it is ...
	68	* So what we have to do is enumerate all children
	69	* of the gpio node and check them all. */
	70	gpio = of_find_node_by_name(NULL, "gpio");
	71	if (!gpio)
	72	return NULL;
	73	while ((np = of_get_next_child(gpio, np))) {
	74	audio_gpio = get_property(np, "audio-gpio", NULL);
	75	if (!audio_gpio)
	76	continue;
	77	if (strcmp(audio_gpio, name) == 0)
	78	break;
	79	if (altname && (strcmp(audio_gpio, altname) == 0))
	80	break;
	81	}
	82	/* still not found, assume not there */
	83	if (!np)
	84	return NULL;
	85	}
	86
	87	reg = (u32 *)get_property(np, "reg", NULL);
	88	if (!reg)
	89	return NULL;
	90
	91	gpioptr = reg;
	92
	93	/* this is a hack, usually the GPIOs 'reg' property
	94	* should have the offset based from the GPIO space
	95	* which is at 0x50, but apparently not always... */
	96	if (*gpioptr < 0x50)
	97	*gpioptr += 0x50;
	98
	99	reg = (u32 *)get_property(np, "audio-gpio-active-state", NULL);
	100	if (!reg)
	101	/* Apple seems to default to 1, but
	102	* that doesn't seem right at least on most
	103	* machines. So until proven that the opposite
	104	* is necessary, we default to 0
	105	* (which, incidentally, snd-powermac also does...) */
	106	*gpioactiveptr = 0;
	107	else
	108	gpioactiveptr = reg;
	109
	110	return np;
	111	}
	112
	113	static void get_irq(struct device_node * np, int *irqptr)
	114	{
2566d36a JB	115	if (np)
	116	*irqptr = irq_of_parse_and_map(np, 0);
	117	else
	118	*irqptr = NO_IRQ;
f3d9478b JB	119	}
	120
	121	/* 0x4 is outenable, 0x1 is out, thus 4 or 5 */
	122	#define SWITCH_GPIO(name, v, on) \
	123	(((v)&~1) \| ((on)? \
	124	(name##_gpio_activestate==0?4:5): \
	125	(name##_gpio_activestate==0?5:4)))
	126
	127	#define FTR_GPIO(name, bit) \
	128	static void ftr_gpio_set_##name(struct gpio_runtime *rt, int on)\
	129	{ \
	130	int v; \
	131	\
	132	if (unlikely(!rt)) return; \
	133	\
	134	if (name##_mute_gpio < 0) \
	135	return; \
	136	\
	137	v = pmac_call_feature(PMAC_FTR_READ_GPIO, NULL, \
	138	name##_mute_gpio, \
	139	0); \
	140	\
	141	/* muted = !on... */ \
	142	v = SWITCH_GPIO(name##_mute, v, !on); \
	143	\
	144	pmac_call_feature(PMAC_FTR_WRITE_GPIO, NULL, \
	145	name##_mute_gpio, v); \
	146	\
	147	rt->implementation_private &= ~(1<<bit); \
	148	rt->implementation_private \|= (!!on << bit); \
	149	} \
	150	static int ftr_gpio_get_##name(struct gpio_runtime *rt) \
	151	{ \
	152	if (unlikely(!rt)) return 0; \
	153	return (rt->implementation_private>>bit)&1; \
	154	}
	155
	156	FTR_GPIO(headphone, 0);
	157	FTR_GPIO(amp, 1);
	158	FTR_GPIO(lineout, 2);
	159
	160	static void ftr_gpio_set_hw_reset(struct gpio_runtime *rt, int on)
	161	{
	162	int v;
	163
	164	if (unlikely(!rt)) return;
	165	if (hw_reset_gpio < 0)
	166	return;
	167
	168	v = pmac_call_feature(PMAC_FTR_READ_GPIO, NULL,
	169	hw_reset_gpio, 0);
	170	v = SWITCH_GPIO(hw_reset, v, on);
	171	pmac_call_feature(PMAC_FTR_WRITE_GPIO, NULL,
	172	hw_reset_gpio, v);
	173	}
	174
	175	static void ftr_gpio_all_amps_off(struct gpio_runtime *rt)
	176	{
	177	int saved;
	178
	179	if (unlikely(!rt)) return;
	180	saved = rt->implementation_private;
	181	ftr_gpio_set_headphone(rt, 0);
	182	ftr_gpio_set_amp(rt, 0);
183	ftr_gpio_set_lineout(rt, 0);
184	rt->implementation_private = saved;
185	}
186
187	static void ftr_gpio_all_amps_restore(struct gpio_runtime *rt)
188	{
189	int s;
190
191	if (unlikely(!rt)) return;
192	s = rt->implementation_private;
193	ftr_gpio_set_headphone(rt, (s>>0)&1);
194	ftr_gpio_set_amp(rt, (s>>1)&1);
195	ftr_gpio_set_lineout(rt, (s>>2)&1);
196	}
197
c4028958	198	static void ftr_handle_notify(struct work_struct *work)
f3d9478b	199	{
c4028958 DH	200	struct gpio_notification *notif =
c4028958 DH	201	container_of(work, struct gpio_notification, work.work);
f3d9478b JB	202
	203	mutex_lock(&notif->mutex);
	204	if (notif->notify)
	205	notif->notify(notif->data);
	206	mutex_unlock(&notif->mutex);
	207	}
	208
bd66f3bb JB	209	static void gpio_enable_dual_edge(int gpio)
	210	{
	211	int v;
	212
	213	if (gpio == -1)
	214	return;
	215	v = pmac_call_feature(PMAC_FTR_READ_GPIO, NULL, gpio, 0);
	216	v \|= 0x80; /* enable dual edge */
	217	pmac_call_feature(PMAC_FTR_WRITE_GPIO, NULL, gpio, v);
	218	}
	219
f3d9478b JB	220	static void ftr_gpio_init(struct gpio_runtime *rt)
	221	{
	222	get_gpio("headphone-mute", NULL,
	223	&headphone_mute_gpio,
	224	&headphone_mute_gpio_activestate);
	225	get_gpio("amp-mute", NULL,
	226	&amp_mute_gpio,
	227	&amp_mute_gpio_activestate);
	228	get_gpio("lineout-mute", NULL,
	229	&lineout_mute_gpio,
	230	&lineout_mute_gpio_activestate);
	231	get_gpio("hw-reset", "audio-hw-reset",
	232	&hw_reset_gpio,
	233	&hw_reset_gpio_activestate);
	234
	235	headphone_detect_node = get_gpio("headphone-detect", NULL,
	236	&headphone_detect_gpio,
	237	&headphone_detect_gpio_activestate);
	238	/* go Apple, and thanks for giving these different names
	239	* across the board... */
	240	lineout_detect_node = get_gpio("lineout-detect", "line-output-detect",
	241	&lineout_detect_gpio,
	242	&lineout_detect_gpio_activestate);
	243	linein_detect_node = get_gpio("linein-detect", "line-input-detect",
	244	&linein_detect_gpio,
	245	&linein_detect_gpio_activestate);
	246
bd66f3bb JB	247	gpio_enable_dual_edge(headphone_detect_gpio);
	248	gpio_enable_dual_edge(lineout_detect_gpio);
	249	gpio_enable_dual_edge(linein_detect_gpio);
	250
f3d9478b JB	251	get_irq(headphone_detect_node, &headphone_detect_irq);
	252	get_irq(lineout_detect_node, &lineout_detect_irq);
	253	get_irq(linein_detect_node, &linein_detect_irq);
	254
	255	ftr_gpio_all_amps_off(rt);
	256	rt->implementation_private = 0;
c4028958 DH	257	INIT_DELAYED_WORK(&rt->headphone_notify.work, ftr_handle_notify);
	258	INIT_DELAYED_WORK(&rt->line_in_notify.work, ftr_handle_notify);
	259	INIT_DELAYED_WORK(&rt->line_out_notify.work, ftr_handle_notify);
f3d9478b JB	260	mutex_init(&rt->headphone_notify.mutex);
	261	mutex_init(&rt->line_in_notify.mutex);
	262	mutex_init(&rt->line_out_notify.mutex);
	263	}
	264
	265	static void ftr_gpio_exit(struct gpio_runtime *rt)
	266	{
	267	ftr_gpio_all_amps_off(rt);
	268	rt->implementation_private = 0;
	269	if (rt->headphone_notify.notify)
	270	free_irq(headphone_detect_irq, &rt->headphone_notify);
	271	if (rt->line_in_notify.gpio_private)
	272	free_irq(linein_detect_irq, &rt->line_in_notify);
	273	if (rt->line_out_notify.gpio_private)
	274	free_irq(lineout_detect_irq, &rt->line_out_notify);
	275	cancel_delayed_work(&rt->headphone_notify.work);
	276	cancel_delayed_work(&rt->line_in_notify.work);
	277	cancel_delayed_work(&rt->line_out_notify.work);
	278	flush_scheduled_work();
	279	mutex_destroy(&rt->headphone_notify.mutex);
	280	mutex_destroy(&rt->line_in_notify.mutex);
	281	mutex_destroy(&rt->line_out_notify.mutex);
	282	}
	283
7d12e780	284	static irqreturn_t ftr_handle_notify_irq(int xx, void *data)
f3d9478b JB	285	{
	286	struct gpio_notification *notif = data;
	287
c4028958	288	schedule_delayed_work(&notif->work, 0);
f3d9478b JB	289
	290	return IRQ_HANDLED;
	291	}
	292
	293	static int ftr_set_notify(struct gpio_runtime *rt,
	294	enum notify_type type,
	295	notify_func_t notify,
	296	void *data)
	297	{
	298	struct gpio_notification *notif;
	299	notify_func_t old;
	300	int irq;
	301	char *name;
	302	int err = -EBUSY;
	303
	304	switch (type) {
	305	case AOA_NOTIFY_HEADPHONE:
	306	notif = &rt->headphone_notify;
	307	name = "headphone-detect";
	308	irq = headphone_detect_irq;
	309	break;
	310	case AOA_NOTIFY_LINE_IN:
	311	notif = &rt->line_in_notify;
	312	name = "linein-detect";
	313	irq = linein_detect_irq;
	314	break;
	315	case AOA_NOTIFY_LINE_OUT:
	316	notif = &rt->line_out_notify;
	317	name = "lineout-detect";
	318	irq = lineout_detect_irq;
	319	break;
	320	default:
	321	return -EINVAL;
	322	}
	323
2566d36a	324	if (irq == NO_IRQ)
f3d9478b JB	325	return -ENODEV;
	326
	327	mutex_lock(&notif->mutex);
	328
	329	old = notif->notify;
	330
	331	if (!old && !notify) {
	332	err = 0;
	333	goto out_unlock;
	334	}
	335
	336	if (old && notify) {
	337	if (old == notify && notif->data == data)
	338	err = 0;
	339	goto out_unlock;
	340	}
	341
	342	if (old && !notify)
	343	free_irq(irq, notif);
	344
	345	if (!old && notify) {
	346	err = request_irq(irq, ftr_handle_notify_irq, 0, name, notif);
	347	if (err)
	348	goto out_unlock;
	349	}
	350
	351	notif->notify = notify;
	352	notif->data = data;
	353
	354	err = 0;
	355	out_unlock:
	356	mutex_unlock(&notif->mutex);
	357	return err;
	358	}
	359
	360	static int ftr_get_detect(struct gpio_runtime *rt,
	361	enum notify_type type)
	362	{
	363	int gpio, ret, active;
	364
	365	switch (type) {
	366	case AOA_NOTIFY_HEADPHONE:
	367	gpio = headphone_detect_gpio;
	368	active = headphone_detect_gpio_activestate;
	369	break;
	370	case AOA_NOTIFY_LINE_IN:
	371	gpio = linein_detect_gpio;
	372	active = linein_detect_gpio_activestate;
	373	break;
	374	case AOA_NOTIFY_LINE_OUT:
	375	gpio = lineout_detect_gpio;
	376	active = lineout_detect_gpio_activestate;
	377	break;
	378	default:
	379	return -EINVAL;
	380	}
	381
	382	if (gpio == -1)
	383	return -ENODEV;
	384
	385	ret = pmac_call_feature(PMAC_FTR_READ_GPIO, NULL, gpio, 0);
	386	if (ret < 0)
	387	return ret;
	388	return ((ret >> 1) & 1) == active;
389	}
390
391	static struct gpio_methods methods = {
392	.init = ftr_gpio_init,
393	.exit = ftr_gpio_exit,
394	.all_amps_off = ftr_gpio_all_amps_off,
395	.all_amps_restore = ftr_gpio_all_amps_restore,
396	.set_headphone = ftr_gpio_set_headphone,
397	.set_speakers = ftr_gpio_set_amp,
398	.set_lineout = ftr_gpio_set_lineout,
399	.set_hw_reset = ftr_gpio_set_hw_reset,
400	.get_headphone = ftr_gpio_get_headphone,
401	.get_speakers = ftr_gpio_get_amp,
402	.get_lineout = ftr_gpio_get_lineout,
403	.set_notify = ftr_set_notify,
404	.get_detect = ftr_get_detect,
405	};
406
407	struct gpio_methods *ftr_gpio_methods = &methods;
408	EXPORT_SYMBOL_GPL(ftr_gpio_methods);