aboutsummaryrefslogtreecommitdiff
path: root/sound/aoa/core/gpio-pmf.c
blob: 7e267c9379bc18dac80998b95701a77068aaa85d (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
/*
 * 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(&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);

	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);