[mirror_ubuntu-jammy-kernel.git] / sound / aoa / core / 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 lots of 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 master_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 master_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;
	const 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 = of_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 = of_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 = of_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);
FTR_GPIO(master, 3);

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 struct gpio_methods methods;

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);
	if (methods.set_master)
		ftr_gpio_set_master(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);
	if (methods.set_master)
		ftr_gpio_set_master(rt, (s>>3)&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);
	if (get_gpio("master-mute", NULL,
		     &master_mute_gpio,
		     &master_mute_gpio_activestate)) {
		methods.set_master = ftr_gpio_set_master;
		methods.get_master = ftr_gpio_get_master;
	}

	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_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);
}

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	*
888dcb7c	8	* This file contains the GPIO control routines for
f3d9478b JB	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
5f17e79c	17	/* TODO: these are lots of global variables
f3d9478b JB	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;
5f17e79c	26	static int master_mute_gpio;
f3d9478b JB	27	static int amp_mute_gpio;
	28	static int lineout_mute_gpio;
	29	static int hw_reset_gpio;
	30	static int lineout_detect_gpio;
	31	static int headphone_detect_gpio;
	32	static int linein_detect_gpio;
	33
	34	/* see the SWITCH_GPIO macro */
	35	static int headphone_mute_gpio_activestate;
5f17e79c	36	static int master_mute_gpio_activestate;
f3d9478b JB	37	static int amp_mute_gpio_activestate;
	38	static int lineout_mute_gpio_activestate;
	39	static int hw_reset_gpio_activestate;
	40	static int lineout_detect_gpio_activestate;
	41	static int headphone_detect_gpio_activestate;
	42	static int linein_detect_gpio_activestate;
	43
	44	/* node pointers that we save when getting the GPIO number
	45	* to get the interrupt later */
	46	static struct device_node *lineout_detect_node;
	47	static struct device_node *linein_detect_node;
	48	static struct device_node *headphone_detect_node;
	49
	50	static int lineout_detect_irq;
	51	static int linein_detect_irq;
	52	static int headphone_detect_irq;
	53
	54	static struct device_node get_gpio(char name,
	55	char *altname,
	56	int *gpioptr,
	57	int *gpioactiveptr)
	58	{
	59	struct device_node np, gpio;
a7edd0e6	60	const u32 *reg;
abddd185	61	const char *audio_gpio;
f3d9478b JB	62
	63	*gpioptr = -1;
	64
	65	/* check if we can get it the easy way ... */
	66	np = of_find_node_by_name(NULL, name);
	67	if (!np) {
	68	/* some machines have only gpioX/extint-gpioX nodes,
	69	* and an audio-gpio property saying what it is ...
	70	* So what we have to do is enumerate all children
	71	* of the gpio node and check them all. */
	72	gpio = of_find_node_by_name(NULL, "gpio");
	73	if (!gpio)
	74	return NULL;
	75	while ((np = of_get_next_child(gpio, np))) {
c4f55b39	76	audio_gpio = of_get_property(np, "audio-gpio", NULL);
f3d9478b JB	77	if (!audio_gpio)
	78	continue;
	79	if (strcmp(audio_gpio, name) == 0)
	80	break;
	81	if (altname && (strcmp(audio_gpio, altname) == 0))
	82	break;
	83	}
	84	/* still not found, assume not there */
	85	if (!np)
	86	return NULL;
	87	}
	88
c4f55b39	89	reg = of_get_property(np, "reg", NULL);
f3d9478b JB	90	if (!reg)
	91	return NULL;
	92
	93	gpioptr = reg;
	94
	95	/* this is a hack, usually the GPIOs 'reg' property
	96	* should have the offset based from the GPIO space
	97	* which is at 0x50, but apparently not always... */
	98	if (*gpioptr < 0x50)
	99	*gpioptr += 0x50;
	100
c4f55b39	101	reg = of_get_property(np, "audio-gpio-active-state", NULL);
f3d9478b JB	102	if (!reg)
	103	/* Apple seems to default to 1, but
	104	* that doesn't seem right at least on most
	105	* machines. So until proven that the opposite
	106	* is necessary, we default to 0
	107	* (which, incidentally, snd-powermac also does...) */
	108	*gpioactiveptr = 0;
	109	else
	110	gpioactiveptr = reg;
	111
	112	return np;
	113	}
	114
	115	static void get_irq(struct device_node * np, int *irqptr)
	116	{
2566d36a JB	117	if (np)
	118	*irqptr = irq_of_parse_and_map(np, 0);
	119	else
	120	*irqptr = NO_IRQ;
f3d9478b JB	121	}
	122
	123	/* 0x4 is outenable, 0x1 is out, thus 4 or 5 */
	124	#define SWITCH_GPIO(name, v, on) \
	125	(((v)&~1) \| ((on)? \
	126	(name##_gpio_activestate==0?4:5): \
	127	(name##_gpio_activestate==0?5:4)))
	128
	129	#define FTR_GPIO(name, bit) \
	130	static void ftr_gpio_set_##name(struct gpio_runtime *rt, int on)\
	131	{ \
	132	int v; \
	133	\
	134	if (unlikely(!rt)) return; \
	135	\
	136	if (name##_mute_gpio < 0) \
	137	return; \
	138	\
	139	v = pmac_call_feature(PMAC_FTR_READ_GPIO, NULL, \
	140	name##_mute_gpio, \
	141	0); \
	142	\
	143	/* muted = !on... */ \
	144	v = SWITCH_GPIO(name##_mute, v, !on); \
	145	\
	146	pmac_call_feature(PMAC_FTR_WRITE_GPIO, NULL, \
	147	name##_mute_gpio, v); \
	148	\
	149	rt->implementation_private &= ~(1<<bit); \
	150	rt->implementation_private \|= (!!on << bit); \
	151	} \
	152	static int ftr_gpio_get_##name(struct gpio_runtime *rt) \
	153	{ \
	154	if (unlikely(!rt)) return 0; \
	155	return (rt->implementation_private>>bit)&1; \
	156	}
	157
	158	FTR_GPIO(headphone, 0);
	159	FTR_GPIO(amp, 1);
	160	FTR_GPIO(lineout, 2);
5f17e79c	161	FTR_GPIO(master, 3);
f3d9478b JB	162
	163	static void ftr_gpio_set_hw_reset(struct gpio_runtime *rt, int on)
	164	{
	165	int v;
	166
	167	if (unlikely(!rt)) return;
	168	if (hw_reset_gpio < 0)
	169	return;
	170
	171	v = pmac_call_feature(PMAC_FTR_READ_GPIO, NULL,
	172	hw_reset_gpio, 0);
	173	v = SWITCH_GPIO(hw_reset, v, on);
	174	pmac_call_feature(PMAC_FTR_WRITE_GPIO, NULL,
	175	hw_reset_gpio, v);
	176	}
	177
5f17e79c JB	178	static struct gpio_methods methods;
5f17e79c JB	179
f3d9478b JB	180	static void ftr_gpio_all_amps_off(struct gpio_runtime *rt)
	181	{
	182	int saved;
	183
	184	if (unlikely(!rt)) return;
	185	saved = rt->implementation_private;
	186	ftr_gpio_set_headphone(rt, 0);
	187	ftr_gpio_set_amp(rt, 0);
	188	ftr_gpio_set_lineout(rt, 0);
5f17e79c JB	189	if (methods.set_master)
5f17e79c JB	190	ftr_gpio_set_master(rt, 0);
f3d9478b JB	191	rt->implementation_private = saved;
	192	}
	193
	194	static void ftr_gpio_all_amps_restore(struct gpio_runtime *rt)
	195	{
	196	int s;
	197
	198	if (unlikely(!rt)) return;
	199	s = rt->implementation_private;
	200	ftr_gpio_set_headphone(rt, (s>>0)&1);
	201	ftr_gpio_set_amp(rt, (s>>1)&1);
	202	ftr_gpio_set_lineout(rt, (s>>2)&1);
5f17e79c JB	203	if (methods.set_master)
5f17e79c JB	204	ftr_gpio_set_master(rt, (s>>3)&1);
f3d9478b JB	205	}
f3d9478b JB	206
c4028958	207	static void ftr_handle_notify(struct work_struct *work)
f3d9478b	208	{
c4028958 DH	209	struct gpio_notification *notif =
c4028958 DH	210	container_of(work, struct gpio_notification, work.work);
f3d9478b JB	211
	212	mutex_lock(&notif->mutex);
	213	if (notif->notify)
	214	notif->notify(notif->data);
	215	mutex_unlock(&notif->mutex);
	216	}
	217
bd66f3bb JB	218	static void gpio_enable_dual_edge(int gpio)
	219	{
	220	int v;
	221
	222	if (gpio == -1)
	223	return;
	224	v = pmac_call_feature(PMAC_FTR_READ_GPIO, NULL, gpio, 0);
	225	v \|= 0x80; /* enable dual edge */
	226	pmac_call_feature(PMAC_FTR_WRITE_GPIO, NULL, gpio, v);
	227	}
	228
f3d9478b JB	229	static void ftr_gpio_init(struct gpio_runtime *rt)
	230	{
	231	get_gpio("headphone-mute", NULL,
	232	&headphone_mute_gpio,
	233	&headphone_mute_gpio_activestate);
	234	get_gpio("amp-mute", NULL,
	235	&amp_mute_gpio,
	236	&amp_mute_gpio_activestate);
	237	get_gpio("lineout-mute", NULL,
	238	&lineout_mute_gpio,
	239	&lineout_mute_gpio_activestate);
	240	get_gpio("hw-reset", "audio-hw-reset",
	241	&hw_reset_gpio,
	242	&hw_reset_gpio_activestate);
5f17e79c JB	243	if (get_gpio("master-mute", NULL,
	244	&master_mute_gpio,
	245	&master_mute_gpio_activestate)) {
	246	methods.set_master = ftr_gpio_set_master;
	247	methods.get_master = ftr_gpio_get_master;
	248	}
f3d9478b JB	249
	250	headphone_detect_node = get_gpio("headphone-detect", NULL,
	251	&headphone_detect_gpio,
	252	&headphone_detect_gpio_activestate);
	253	/* go Apple, and thanks for giving these different names
	254	* across the board... */
	255	lineout_detect_node = get_gpio("lineout-detect", "line-output-detect",
	256	&lineout_detect_gpio,
	257	&lineout_detect_gpio_activestate);
	258	linein_detect_node = get_gpio("linein-detect", "line-input-detect",
	259	&linein_detect_gpio,
	260	&linein_detect_gpio_activestate);
	261
bd66f3bb JB	262	gpio_enable_dual_edge(headphone_detect_gpio);
	263	gpio_enable_dual_edge(lineout_detect_gpio);
	264	gpio_enable_dual_edge(linein_detect_gpio);
	265
f3d9478b JB	266	get_irq(headphone_detect_node, &headphone_detect_irq);
	267	get_irq(lineout_detect_node, &lineout_detect_irq);
	268	get_irq(linein_detect_node, &linein_detect_irq);
	269
	270	ftr_gpio_all_amps_off(rt);
	271	rt->implementation_private = 0;
c4028958 DH	272	INIT_DELAYED_WORK(&rt->headphone_notify.work, ftr_handle_notify);
	273	INIT_DELAYED_WORK(&rt->line_in_notify.work, ftr_handle_notify);
	274	INIT_DELAYED_WORK(&rt->line_out_notify.work, ftr_handle_notify);
f3d9478b JB	275	mutex_init(&rt->headphone_notify.mutex);
	276	mutex_init(&rt->line_in_notify.mutex);
	277	mutex_init(&rt->line_out_notify.mutex);
	278	}
	279
	280	static void ftr_gpio_exit(struct gpio_runtime *rt)
	281	{
	282	ftr_gpio_all_amps_off(rt);
	283	rt->implementation_private = 0;
	284	if (rt->headphone_notify.notify)
	285	free_irq(headphone_detect_irq, &rt->headphone_notify);
	286	if (rt->line_in_notify.gpio_private)
	287	free_irq(linein_detect_irq, &rt->line_in_notify);
	288	if (rt->line_out_notify.gpio_private)
	289	free_irq(lineout_detect_irq, &rt->line_out_notify);
5b84ba26 TH	290	cancel_delayed_work_sync(&rt->headphone_notify.work);
	291	cancel_delayed_work_sync(&rt->line_in_notify.work);
	292	cancel_delayed_work_sync(&rt->line_out_notify.work);
f3d9478b JB	293	mutex_destroy(&rt->headphone_notify.mutex);
	294	mutex_destroy(&rt->line_in_notify.mutex);
	295	mutex_destroy(&rt->line_out_notify.mutex);
	296	}
	297
7d12e780	298	static irqreturn_t ftr_handle_notify_irq(int xx, void *data)
f3d9478b JB	299	{
	300	struct gpio_notification *notif = data;
	301
c4028958	302	schedule_delayed_work(&notif->work, 0);
f3d9478b JB	303
	304	return IRQ_HANDLED;
	305	}
	306
	307	static int ftr_set_notify(struct gpio_runtime *rt,
	308	enum notify_type type,
	309	notify_func_t notify,
	310	void *data)
	311	{
	312	struct gpio_notification *notif;
	313	notify_func_t old;
	314	int irq;
	315	char *name;
	316	int err = -EBUSY;
	317
	318	switch (type) {
	319	case AOA_NOTIFY_HEADPHONE:
	320	notif = &rt->headphone_notify;
	321	name = "headphone-detect";
	322	irq = headphone_detect_irq;
	323	break;
	324	case AOA_NOTIFY_LINE_IN:
	325	notif = &rt->line_in_notify;
	326	name = "linein-detect";
	327	irq = linein_detect_irq;
	328	break;
	329	case AOA_NOTIFY_LINE_OUT:
	330	notif = &rt->line_out_notify;
	331	name = "lineout-detect";
	332	irq = lineout_detect_irq;
	333	break;
	334	default:
	335	return -EINVAL;
	336	}
	337
2566d36a	338	if (irq == NO_IRQ)
f3d9478b JB	339	return -ENODEV;
	340
	341	mutex_lock(&notif->mutex);
	342
	343	old = notif->notify;
	344
	345	if (!old && !notify) {
	346	err = 0;
	347	goto out_unlock;
	348	}
	349
	350	if (old && notify) {
	351	if (old == notify && notif->data == data)
	352	err = 0;
	353	goto out_unlock;
	354	}
	355
	356	if (old && !notify)
	357	free_irq(irq, notif);
	358
	359	if (!old && notify) {
	360	err = request_irq(irq, ftr_handle_notify_irq, 0, name, notif);
	361	if (err)
	362	goto out_unlock;
	363	}
	364
	365	notif->notify = notify;
	366	notif->data = data;
	367
	368	err = 0;
	369	out_unlock:
	370	mutex_unlock(&notif->mutex);
	371	return err;
	372	}
	373
	374	static int ftr_get_detect(struct gpio_runtime *rt,
	375	enum notify_type type)
	376	{
	377	int gpio, ret, active;
	378
	379	switch (type) {
	380	case AOA_NOTIFY_HEADPHONE:
	381	gpio = headphone_detect_gpio;
	382	active = headphone_detect_gpio_activestate;
	383	break;
	384	case AOA_NOTIFY_LINE_IN:
	385	gpio = linein_detect_gpio;
	386	active = linein_detect_gpio_activestate;
	387	break;
	388	case AOA_NOTIFY_LINE_OUT:
	389	gpio = lineout_detect_gpio;
	390	active = lineout_detect_gpio_activestate;
	391	break;
	392	default:
	393	return -EINVAL;
	394	}
	395
	396	if (gpio == -1)
	397	return -ENODEV;
	398
	399	ret = pmac_call_feature(PMAC_FTR_READ_GPIO, NULL, gpio, 0);
	400	if (ret < 0)
	401	return ret;
	402	return ((ret >> 1) & 1) == active;
403	}
404
405	static struct gpio_methods methods = {
406	.init = ftr_gpio_init,
407	.exit = ftr_gpio_exit,
408	.all_amps_off = ftr_gpio_all_amps_off,
409	.all_amps_restore = ftr_gpio_all_amps_restore,
410	.set_headphone = ftr_gpio_set_headphone,
411	.set_speakers = ftr_gpio_set_amp,
412	.set_lineout = ftr_gpio_set_lineout,
413	.set_hw_reset = ftr_gpio_set_hw_reset,
414	.get_headphone = ftr_gpio_get_headphone,
415	.get_speakers = ftr_gpio_get_amp,
416	.get_lineout = ftr_gpio_get_lineout,
417	.set_notify = ftr_set_notify,
418	.get_detect = ftr_get_detect,
419	};
420
421	struct gpio_methods *ftr_gpio_methods = &methods;
422	EXPORT_SYMBOL_GPL(ftr_gpio_methods);