aboutsummaryrefslogtreecommitdiffstats
path: root/drivers/input/misc/sparcspkr.c
blob: 42c11fbf3c79ff12d405f9f2c13d1ebed9da7901 (plain) (blame)
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
255
256
257
258
259
260
261
262
263
264
/*
 *  Driver for PC-speaker like devices found on various Sparc systems.
 *
 *  Copyright (c) 2002 Vojtech Pavlik
 *  Copyright (c) 2002, 2006 David S. Miller (davem@davemloft.net)
 */
#include <linux/config.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/input.h>
#include <linux/platform_device.h>

#include <asm/io.h>
#include <asm/ebus.h>
#include <asm/isa.h>

MODULE_AUTHOR("David S. Miller <davem@davemloft.net>");
MODULE_DESCRIPTION("Sparc Speaker beeper driver");
MODULE_LICENSE("GPL");

struct sparcspkr_state {
	const char		*name;
	unsigned long		iobase;
	int (*event)(struct input_dev *dev, unsigned int type, unsigned int code, int value);
	spinlock_t		lock;
	struct input_dev	*input_dev;
};

static int ebus_spkr_event(struct input_dev *dev, unsigned int type, unsigned int code, int value)
{
	struct sparcspkr_state *state = dev_get_drvdata(dev->cdev.dev);
	unsigned int count = 0;
	unsigned long flags;

	if (type != EV_SND)
		return -1;

	switch (code) {
		case SND_BELL: if (value) value = 1000;
		case SND_TONE: break;
		default: return -1;
	}

	if (value > 20 && value < 32767)
		count = 1193182 / value;

	spin_lock_irqsave(&state->lock, flags);

	/* EBUS speaker only has on/off state, the frequency does not
	 * appear to be programmable.
	 */
	if (state->iobase & 0x2UL)
		outb(!!count, state->iobase);
	else
		outl(!!count, state->iobase);

	spin_unlock_irqrestore(&state->lock, flags);

	return 0;
}

static int isa_spkr_event(struct input_dev *dev, unsigned int type, unsigned int code, int value)
{
	struct sparcspkr_state *state = dev_get_drvdata(dev->cdev.dev);
	unsigned int count = 0;
	unsigned long flags;

	if (type != EV_SND)
		return -1;

	switch (code) {
		case SND_BELL: if (value) value = 1000;
		case SND_TONE: break;
		default: return -1;
	}

	if (value > 20 && value < 32767)
		count = 1193182 / value;

	spin_lock_irqsave(&state->lock, flags);

	if (count) {
		/* enable counter 2 */
		outb(inb(state->iobase + 0x61) | 3, state->iobase + 0x61);
		/* set command for counter 2, 2 byte write */
		outb(0xB6, state->iobase + 0x43);
		/* select desired HZ */
		outb(count & 0xff, state->iobase + 0x42);
		outb((count >> 8) & 0xff, state->iobase + 0x42);
	} else {
		/* disable counter 2 */
		outb(inb_p(state->iobase + 0x61) & 0xFC, state->iobase + 0x61);
	}

	spin_unlock_irqrestore(&state->lock, flags);

	return 0;
}

static int __devinit sparcspkr_probe(struct device *dev)
{
	struct sparcspkr_state *state = dev_get_drvdata(dev);
	struct input_dev *input_dev;
	int error;

	input_dev = input_allocate_device();
	if (!input_dev)
		return -ENOMEM;

	input_dev->name = state->name;
	input_dev->phys = "sparc/input0";
	input_dev->id.bustype = BUS_ISA;
	input_dev->id.vendor = 0x001f;
	input_dev->id.product = 0x0001;
	input_dev->id.version = 0x0100;
	input_dev->cdev.dev = dev;

	input_dev->evbit[0] = BIT(EV_SND);
	input_dev->sndbit[0] = BIT(SND_BELL) | BIT(SND_TONE);

	input_dev->event = state->event;

	error = input_register_device(input_dev);
	if (error) {
		input_free_device(input_dev);
		return error;
	}

	state->input_dev = input_dev;

	return 0;
}

static int __devexit sparcspkr_remove(struct of_device *dev)
{
	struct sparcspkr_state *state = dev_get_drvdata(&dev->dev);
	struct input_dev *input_dev = state->input_dev;

	/* turn off the speaker */
	state->event(input_dev, EV_SND, SND_BELL, 0);

	input_unregister_device(input_dev);

	dev_set_drvdata(&dev->dev, NULL);
	kfree(state);

	return 0;
}

static int sparcspkr_shutdown(struct of_device *dev)
{
	struct sparcspkr_state *state = dev_get_drvdata(&dev->dev);
	struct input_dev *input_dev = state->input_dev;

	/* turn off the speaker */
	state->event(input_dev, EV_SND, SND_BELL, 0);

	return 0;
}

static int __devinit ebus_beep_probe(struct of_device *dev, const struct of_device_id *match)
{
	struct linux_ebus_device *edev = to_ebus_device(&dev->dev);
	struct sparcspkr_state *state;
	int err;

	state = kzalloc(sizeof(*state), GFP_KERNEL);
	if (!state)
		return -ENOMEM;

	state->name = "Sparc EBUS Speaker";
	state->iobase = edev->resource[0].start;
	state->event = ebus_spkr_event;
	spin_lock_init(&state->lock);

	dev_set_drvdata(&dev->dev, state);

	err = sparcspkr_probe(&dev->dev);
	if (err) {
		dev_set_drvdata(&dev->dev, NULL);
		kfree(state);
	}

	return 0;
}

static struct of_device_id ebus_beep_match[] = {
	{
		.name = "beep",
	},
	{},
};

static struct of_platform_driver ebus_beep_driver = {
	.name		= "beep",
	.match_table	= ebus_beep_match,
	.probe		= ebus_beep_probe,
	.remove		= sparcspkr_remove,
	.shutdown	= sparcspkr_shutdown,
};

static int __devinit isa_beep_probe(struct of_device *dev, const struct of_device_id *match)
{
	struct sparc_isa_device *idev = to_isa_device(&dev->dev);
	struct sparcspkr_state *state;
	int err;

	state = kzalloc(sizeof(*state), GFP_KERNEL);
	if (!state)
		return -ENOMEM;

	state->name = "Sparc ISA Speaker";
	state->iobase = idev->resource.start;
	state->event = isa_spkr_event;
	spin_lock_init(&state->lock);

	dev_set_drvdata(&dev->dev, state);

	err = sparcspkr_probe(&dev->dev);
	if (err) {
		dev_set_drvdata(&dev->dev, NULL);
		kfree(state);
	}

	return 0;
}

static struct of_device_id isa_beep_match[] = {
	{
		.name = "dma",
	},
	{},
};

static struct of_platform_driver isa_beep_driver = {
	.name		= "beep",
	.match_table	= isa_beep_match,
	.probe		= isa_beep_probe,
	.remove		= sparcspkr_remove,
	.shutdown	= sparcspkr_shutdown,
};

static int __init sparcspkr_init(void)
{
	int err = of_register_driver(&ebus_beep_driver, &ebus_bus_type);

	if (!err) {
		err = of_register_driver(&isa_beep_driver, &isa_bus_type);
		if (err)
			of_unregister_driver(&ebus_beep_driver);
	}

	return err;
}

static void __exit sparcspkr_exit(void)
{
	of_unregister_driver(&ebus_beep_driver);
	of_unregister_driver(&isa_beep_driver);
}

module_init(sparcspkr_init);
module_exit(sparcspkr_exit);