[deliverable/linux.git] / drivers / input / misc / sparcspkr.c

/*
 *  Driver for PC-speaker like devices found on various Sparc systems.
 *
 *  Copyright (c) 2002 Vojtech Pavlik
 *  Copyright (c) 2002, 2006, 2008 David S. Miller (davem@davemloft.net)
 */
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/input.h>
#include <linux/of_device.h>
#include <linux/slab.h>

#include <asm/io.h>

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

struct grover_beep_info {
	void __iomem	*freq_regs;
	void __iomem	*enable_reg;
};

struct bbc_beep_info {
	u32		clock_freq;
	void __iomem	*regs;
};

struct sparcspkr_state {
	const char		*name;
	int (*event)(struct input_dev *dev, unsigned int type, unsigned int code, int value);
	spinlock_t		lock;
	struct input_dev	*input_dev;
	union {
		struct grover_beep_info grover;
		struct bbc_beep_info bbc;
	} u;
};

static u32 bbc_count_to_reg(struct bbc_beep_info *info, unsigned int count)
{
	u32 val, clock_freq = info->clock_freq;
	int i;

	if (!count)
		return 0;

	if (count <= clock_freq >> 20)
		return 1 << 18;

	if (count >= clock_freq >> 12)
		return 1 << 10;

	val = 1 << 18;
	for (i = 19; i >= 11; i--) {
		val >>= 1;
		if (count <= clock_freq >> i)
			break;
	}

	return val;
}

static int bbc_spkr_event(struct input_dev *dev, unsigned int type, unsigned int code, int value)
{
	struct sparcspkr_state *state = dev_get_drvdata(dev->dev.parent);
	struct bbc_beep_info *info = &state->u.bbc;
	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;

	count = bbc_count_to_reg(info, count);

	spin_lock_irqsave(&state->lock, flags);

	if (count) {
		outb(0x01,                 info->regs + 0);
		outb(0x00,                 info->regs + 2);
		outb((count >> 16) & 0xff, info->regs + 3);
		outb((count >>  8) & 0xff, info->regs + 4);
		outb(0x00,                 info->regs + 5);
	} else {
		outb(0x00,                 info->regs + 0);
	}

	spin_unlock_irqrestore(&state->lock, flags);

	return 0;
}

static int grover_spkr_event(struct input_dev *dev, unsigned int type, unsigned int code, int value)
{
	struct sparcspkr_state *state = dev_get_drvdata(dev->dev.parent);
	struct grover_beep_info *info = &state->u.grover;
	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(info->enable_reg) | 3, info->enable_reg);
		/* set command for counter 2, 2 byte write */
		outb(0xB6, info->freq_regs + 1);
		/* select desired HZ */
		outb(count & 0xff, info->freq_regs + 0);
		outb((count >> 8) & 0xff, info->freq_regs + 0);
	} else {
		/* disable counter 2 */
		outb(inb_p(info->enable_reg) & 0xFC, info->enable_reg);
	}

	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->dev.parent = dev;

	input_dev->evbit[0] = BIT_MASK(EV_SND);
	input_dev->sndbit[0] = BIT_MASK(SND_BELL) | BIT_MASK(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 sparcspkr_shutdown(struct platform_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 bbc_beep_probe(struct platform_device *op, const struct of_device_id *match)
{
	struct sparcspkr_state *state;
	struct bbc_beep_info *info;
	struct device_node *dp;
	int err = -ENOMEM;

	state = kzalloc(sizeof(*state), GFP_KERNEL);
	if (!state)
		goto out_err;

	state->name = "Sparc BBC Speaker";
	state->event = bbc_spkr_event;
	spin_lock_init(&state->lock);

	dp = of_find_node_by_path("/");
	err = -ENODEV;
	if (!dp)
		goto out_free;

	info = &state->u.bbc;
	info->clock_freq = of_getintprop_default(dp, "clock-frequency", 0);
	if (!info->clock_freq)
		goto out_free;

	info->regs = of_ioremap(&op->resource[0], 0, 6, "bbc beep");
	if (!info->regs)
		goto out_free;

	dev_set_drvdata(&op->dev, state);

	err = sparcspkr_probe(&op->dev);
	if (err)
		goto out_clear_drvdata;

	return 0;

out_clear_drvdata:
	dev_set_drvdata(&op->dev, NULL);
	of_iounmap(&op->resource[0], info->regs, 6);

out_free:
	kfree(state);
out_err:
	return err;
}

static int __devexit bbc_remove(struct platform_device *op)
{
	struct sparcspkr_state *state = dev_get_drvdata(&op->dev);
	struct input_dev *input_dev = state->input_dev;
	struct bbc_beep_info *info = &state->u.bbc;

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

	input_unregister_device(input_dev);

	of_iounmap(&op->resource[0], info->regs, 6);

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

	return 0;
}

static const struct of_device_id bbc_beep_match[] = {
	{
		.name = "beep",
		.compatible = "SUNW,bbc-beep",
	},
	{},
};

static struct of_platform_driver bbc_beep_driver = {
	.driver = {
		.name = "bbcbeep",
		.owner = THIS_MODULE,
		.of_match_table = bbc_beep_match,
	},
	.probe		= bbc_beep_probe,
	.remove		= __devexit_p(bbc_remove),
	.shutdown	= sparcspkr_shutdown,
};

static int __devinit grover_beep_probe(struct platform_device *op, const struct of_device_id *match)
{
	struct sparcspkr_state *state;
	struct grover_beep_info *info;
	int err = -ENOMEM;

	state = kzalloc(sizeof(*state), GFP_KERNEL);
	if (!state)
		goto out_err;

	state->name = "Sparc Grover Speaker";
	state->event = grover_spkr_event;
	spin_lock_init(&state->lock);

	info = &state->u.grover;
	info->freq_regs = of_ioremap(&op->resource[2], 0, 2, "grover beep freq");
	if (!info->freq_regs)
		goto out_free;

	info->enable_reg = of_ioremap(&op->resource[3], 0, 1, "grover beep enable");
	if (!info->enable_reg)
		goto out_unmap_freq_regs;

	dev_set_drvdata(&op->dev, state);

	err = sparcspkr_probe(&op->dev);
	if (err)
		goto out_clear_drvdata;

	return 0;

out_clear_drvdata:
	dev_set_drvdata(&op->dev, NULL);
	of_iounmap(&op->resource[3], info->enable_reg, 1);

out_unmap_freq_regs:
	of_iounmap(&op->resource[2], info->freq_regs, 2);
out_free:
	kfree(state);
out_err:
	return err;
}

static int __devexit grover_remove(struct platform_device *op)
{
	struct sparcspkr_state *state = dev_get_drvdata(&op->dev);
	struct grover_beep_info *info = &state->u.grover;
	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);

	of_iounmap(&op->resource[3], info->enable_reg, 1);
	of_iounmap(&op->resource[2], info->freq_regs, 2);

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

	return 0;
}

static const struct of_device_id grover_beep_match[] = {
	{
		.name = "beep",
		.compatible = "SUNW,smbus-beep",
	},
	{},
};

static struct of_platform_driver grover_beep_driver = {
	.driver = {
		.name = "groverbeep",
		.owner = THIS_MODULE,
		.of_match_table = grover_beep_match,
	},
	.probe		= grover_beep_probe,
	.remove		= __devexit_p(grover_remove),
	.shutdown	= sparcspkr_shutdown,
};

static int __init sparcspkr_init(void)
{
	int err = of_register_platform_driver(&bbc_beep_driver);

	if (!err) {
		err = of_register_platform_driver(&grover_beep_driver);
		if (err)
			of_unregister_platform_driver(&bbc_beep_driver);
	}

	return err;
}

static void __exit sparcspkr_exit(void)
{
	of_unregister_platform_driver(&bbc_beep_driver);
	of_unregister_platform_driver(&grover_beep_driver);
}

module_init(sparcspkr_init);
module_exit(sparcspkr_exit);
Commit	Line	Data
1da177e4 LT	1	/*
	2	* Driver for PC-speaker like devices found on various Sparc systems.
	3	*
	4	* Copyright (c) 2002 Vojtech Pavlik
9c1a5077	5	* Copyright (c) 2002, 2006, 2008 David S. Miller (davem@davemloft.net)
1da177e4	6	*/
1da177e4 LT	7	#include <linux/kernel.h>
	8	#include <linux/module.h>
	9	#include <linux/init.h>
	10	#include <linux/input.h>
9c1a5077	11	#include <linux/of_device.h>
5a0e3ad6	12	#include <linux/slab.h>
1da177e4 LT	13
1da177e4 LT	14	#include <asm/io.h>
1da177e4	15
a2bd4fd1	16	MODULE_AUTHOR("David S. Miller <davem@davemloft.net>");
76b7cddf	17	MODULE_DESCRIPTION("Sparc Speaker beeper driver");
1da177e4 LT	18	MODULE_LICENSE("GPL");
1da177e4 LT	19
9c1a5077 DM	20	struct grover_beep_info {
	21	void __iomem *freq_regs;
	22	void __iomem *enable_reg;
	23	};
	24
	25	struct bbc_beep_info {
	26	u32 clock_freq;
	27	void __iomem *regs;
	28	};
	29
a2bd4fd1 DM	30	struct sparcspkr_state {
a2bd4fd1 DM	31	const char *name;
a2bd4fd1 DM	32	int (event)(struct input_dev dev, unsigned int type, unsigned int code, int value);
	33	spinlock_t lock;
	34	struct input_dev *input_dev;
9c1a5077 DM	35	union {
	36	struct grover_beep_info grover;
	37	struct bbc_beep_info bbc;
	38	} u;
a2bd4fd1	39	};
1da177e4	40
9c1a5077 DM	41	static u32 bbc_count_to_reg(struct bbc_beep_info *info, unsigned int count)
	42	{
	43	u32 val, clock_freq = info->clock_freq;
	44	int i;
	45
	46	if (!count)
	47	return 0;
	48
	49	if (count <= clock_freq >> 20)
	50	return 1 << 18;
	51
	52	if (count >= clock_freq >> 12)
	53	return 1 << 10;
	54
	55	val = 1 << 18;
	56	for (i = 19; i >= 11; i--) {
	57	val >>= 1;
	58	if (count <= clock_freq >> i)
	59	break;
	60	}
	61
	62	return val;
	63	}
	64
	65	static int bbc_spkr_event(struct input_dev *dev, unsigned int type, unsigned int code, int value)
1da177e4	66	{
293e6392	67	struct sparcspkr_state *state = dev_get_drvdata(dev->dev.parent);
9c1a5077	68	struct bbc_beep_info *info = &state->u.bbc;
1da177e4 LT	69	unsigned int count = 0;
	70	unsigned long flags;
	71
	72	if (type != EV_SND)
	73	return -1;
	74
	75	switch (code) {
	76	case SND_BELL: if (value) value = 1000;
	77	case SND_TONE: break;
	78	default: return -1;
	79	}
	80
	81	if (value > 20 && value < 32767)
	82	count = 1193182 / value;
	83
9c1a5077 DM	84	count = bbc_count_to_reg(info, count);
9c1a5077 DM	85
a2bd4fd1	86	spin_lock_irqsave(&state->lock, flags);
1da177e4	87
9c1a5077 DM	88	if (count) {
	89	outb(0x01, info->regs + 0);
	90	outb(0x00, info->regs + 2);
	91	outb((count >> 16) & 0xff, info->regs + 3);
	92	outb((count >> 8) & 0xff, info->regs + 4);
	93	outb(0x00, info->regs + 5);
	94	} else {
	95	outb(0x00, info->regs + 0);
	96	}
1da177e4	97
a2bd4fd1	98	spin_unlock_irqrestore(&state->lock, flags);
1da177e4 LT	99
	100	return 0;
	101	}
	102
9c1a5077	103	static int grover_spkr_event(struct input_dev *dev, unsigned int type, unsigned int code, int value)
1da177e4	104	{
293e6392	105	struct sparcspkr_state *state = dev_get_drvdata(dev->dev.parent);
9c1a5077	106	struct grover_beep_info *info = &state->u.grover;
1da177e4 LT	107	unsigned int count = 0;
	108	unsigned long flags;
	109
	110	if (type != EV_SND)
	111	return -1;
	112
	113	switch (code) {
	114	case SND_BELL: if (value) value = 1000;
	115	case SND_TONE: break;
	116	default: return -1;
	117	}
	118
	119	if (value > 20 && value < 32767)
	120	count = 1193182 / value;
	121
a2bd4fd1	122	spin_lock_irqsave(&state->lock, flags);
1da177e4 LT	123
	124	if (count) {
	125	/* enable counter 2 */
9c1a5077	126	outb(inb(info->enable_reg) \| 3, info->enable_reg);
1da177e4	127	/* set command for counter 2, 2 byte write */
9c1a5077	128	outb(0xB6, info->freq_regs + 1);
1da177e4	129	/* select desired HZ */
9c1a5077 DM	130	outb(count & 0xff, info->freq_regs + 0);
9c1a5077 DM	131	outb((count >> 8) & 0xff, info->freq_regs + 0);
1da177e4 LT	132	} else {
1da177e4 LT	133	/* disable counter 2 */
9c1a5077	134	outb(inb_p(info->enable_reg) & 0xFC, info->enable_reg);
1da177e4 LT	135	}
1da177e4 LT	136
a2bd4fd1	137	spin_unlock_irqrestore(&state->lock, flags);
1da177e4 LT	138
	139	return 0;
	140	}
	141
a2bd4fd1	142	static int __devinit sparcspkr_probe(struct device *dev)
1da177e4	143	{
a2bd4fd1	144	struct sparcspkr_state *state = dev_get_drvdata(dev);
f5b64078 DT	145	struct input_dev *input_dev;
f5b64078 DT	146	int error;
1da177e4	147
f5b64078 DT	148	input_dev = input_allocate_device();
f5b64078 DT	149	if (!input_dev)
76b7cddf DT	150	return -ENOMEM;
76b7cddf DT	151
a2bd4fd1	152	input_dev->name = state->name;
f5b64078 DT	153	input_dev->phys = "sparc/input0";
	154	input_dev->id.bustype = BUS_ISA;
	155	input_dev->id.vendor = 0x001f;
	156	input_dev->id.product = 0x0001;
	157	input_dev->id.version = 0x0100;
293e6392	158	input_dev->dev.parent = dev;
1da177e4	159
7b19ada2 JS	160	input_dev->evbit[0] = BIT_MASK(EV_SND);
7b19ada2 JS	161	input_dev->sndbit[0] = BIT_MASK(SND_BELL) \| BIT_MASK(SND_TONE);
1da177e4	162
a2bd4fd1	163	input_dev->event = state->event;
f5b64078 DT	164
	165	error = input_register_device(input_dev);
	166	if (error) {
	167	input_free_device(input_dev);
	168	return error;
	169	}
	170
a2bd4fd1	171	state->input_dev = input_dev;
1da177e4	172
1da177e4 LT	173	return 0;
1da177e4 LT	174	}
f5b64078	175
2dc11581	176	static int sparcspkr_shutdown(struct platform_device *dev)
f5b64078	177	{
a2bd4fd1 DM	178	struct sparcspkr_state *state = dev_get_drvdata(&dev->dev);
a2bd4fd1 DM	179	struct input_dev *input_dev = state->input_dev;
f5b64078	180
f5b64078	181	/* turn off the speaker */
a2bd4fd1 DM	182	state->event(input_dev, EV_SND, SND_BELL, 0);
a2bd4fd1 DM	183
f5b64078 DT	184	return 0;
	185	}
	186
2dc11581	187	static int __devinit bbc_beep_probe(struct platform_device op, const struct of_device_id match)
f5b64078	188	{
9c1a5077 DM	189	struct sparcspkr_state *state;
	190	struct bbc_beep_info *info;
	191	struct device_node *dp;
	192	int err = -ENOMEM;
a2bd4fd1	193
9c1a5077 DM	194	state = kzalloc(sizeof(*state), GFP_KERNEL);
	195	if (!state)
	196	goto out_err;
	197
	198	state->name = "Sparc BBC Speaker";
	199	state->event = bbc_spkr_event;
	200	spin_lock_init(&state->lock);
	201
	202	dp = of_find_node_by_path("/");
	203	err = -ENODEV;
	204	if (!dp)
	205	goto out_free;
	206
	207	info = &state->u.bbc;
	208	info->clock_freq = of_getintprop_default(dp, "clock-frequency", 0);
	209	if (!info->clock_freq)
	210	goto out_free;
	211
	212	info->regs = of_ioremap(&op->resource[0], 0, 6, "bbc beep");
	213	if (!info->regs)
	214	goto out_free;
	215
	216	dev_set_drvdata(&op->dev, state);
	217
	218	err = sparcspkr_probe(&op->dev);
	219	if (err)
	220	goto out_clear_drvdata;
a2bd4fd1 DM	221
a2bd4fd1 DM	222	return 0;
9c1a5077 DM	223
	224	out_clear_drvdata:
	225	dev_set_drvdata(&op->dev, NULL);
	226	of_iounmap(&op->resource[0], info->regs, 6);
	227
	228	out_free:
	229	kfree(state);
	230	out_err:
	231	return err;
a2bd4fd1 DM	232	}
a2bd4fd1 DM	233
2dc11581	234	static int __devexit bbc_remove(struct platform_device *op)
a2bd4fd1	235	{
9c1a5077 DM	236	struct sparcspkr_state *state = dev_get_drvdata(&op->dev);
	237	struct input_dev *input_dev = state->input_dev;
	238	struct bbc_beep_info *info = &state->u.bbc;
a2bd4fd1	239
9c1a5077 DM	240	/* turn off the speaker */
9c1a5077 DM	241	state->event(input_dev, EV_SND, SND_BELL, 0);
a2bd4fd1	242
9c1a5077	243	input_unregister_device(input_dev);
a2bd4fd1	244
9c1a5077	245	of_iounmap(&op->resource[0], info->regs, 6);
a2bd4fd1	246
9c1a5077 DM	247	dev_set_drvdata(&op->dev, NULL);
9c1a5077 DM	248	kfree(state);
a2bd4fd1 DM	249
a2bd4fd1 DM	250	return 0;
f5b64078 DT	251	}
f5b64078 DT	252
fd098316	253	static const struct of_device_id bbc_beep_match[] = {
a2bd4fd1 DM	254	{
a2bd4fd1 DM	255	.name = "beep",
9c1a5077	256	.compatible = "SUNW,bbc-beep",
f5b64078	257	},
a2bd4fd1	258	{},
f5b64078 DT	259	};
f5b64078 DT	260
9c1a5077	261	static struct of_platform_driver bbc_beep_driver = {
4018294b GL	262	.driver = {
	263	.name = "bbcbeep",
	264	.owner = THIS_MODULE,
	265	.of_match_table = bbc_beep_match,
	266	},
9c1a5077 DM	267	.probe = bbc_beep_probe,
9c1a5077 DM	268	.remove = __devexit_p(bbc_remove),
a2bd4fd1 DM	269	.shutdown = sparcspkr_shutdown,
a2bd4fd1 DM	270	};
f5b64078	271
2dc11581	272	static int __devinit grover_beep_probe(struct platform_device op, const struct of_device_id match)
f5b64078	273	{
a2bd4fd1	274	struct sparcspkr_state *state;
9c1a5077 DM	275	struct grover_beep_info *info;
9c1a5077 DM	276	int err = -ENOMEM;
f5b64078	277
a2bd4fd1 DM	278	state = kzalloc(sizeof(*state), GFP_KERNEL);
a2bd4fd1 DM	279	if (!state)
9c1a5077	280	goto out_err;
f5b64078	281
9c1a5077 DM	282	state->name = "Sparc Grover Speaker";
9c1a5077 DM	283	state->event = grover_spkr_event;
a2bd4fd1 DM	284	spin_lock_init(&state->lock);
a2bd4fd1 DM	285
9c1a5077 DM	286	info = &state->u.grover;
	287	info->freq_regs = of_ioremap(&op->resource[2], 0, 2, "grover beep freq");
	288	if (!info->freq_regs)
	289	goto out_free;
f5b64078	290
9c1a5077 DM	291	info->enable_reg = of_ioremap(&op->resource[3], 0, 1, "grover beep enable");
	292	if (!info->enable_reg)
	293	goto out_unmap_freq_regs;
	294
	295	dev_set_drvdata(&op->dev, state);
	296
	297	err = sparcspkr_probe(&op->dev);
	298	if (err)
	299	goto out_clear_drvdata;
	300
	301	return 0;
	302
	303	out_clear_drvdata:
	304	dev_set_drvdata(&op->dev, NULL);
	305	of_iounmap(&op->resource[3], info->enable_reg, 1);
	306
	307	out_unmap_freq_regs:
	308	of_iounmap(&op->resource[2], info->freq_regs, 2);
	309	out_free:
	310	kfree(state);
	311	out_err:
	312	return err;
	313	}
	314
2dc11581	315	static int __devexit grover_remove(struct platform_device *op)
9c1a5077 DM	316	{
	317	struct sparcspkr_state *state = dev_get_drvdata(&op->dev);
	318	struct grover_beep_info *info = &state->u.grover;
	319	struct input_dev *input_dev = state->input_dev;
	320
	321	/* turn off the speaker */
	322	state->event(input_dev, EV_SND, SND_BELL, 0);
	323
	324	input_unregister_device(input_dev);
	325
	326	of_iounmap(&op->resource[3], info->enable_reg, 1);
	327	of_iounmap(&op->resource[2], info->freq_regs, 2);
	328
	329	dev_set_drvdata(&op->dev, NULL);
	330	kfree(state);
f5b64078 DT	331
f5b64078 DT	332	return 0;
a2bd4fd1	333	}
f5b64078	334
fd098316	335	static const struct of_device_id grover_beep_match[] = {
a2bd4fd1	336	{
9c1a5077 DM	337	.name = "beep",
9c1a5077 DM	338	.compatible = "SUNW,smbus-beep",
a2bd4fd1 DM	339	},
	340	{},
	341	};
f5b64078	342
9c1a5077	343	static struct of_platform_driver grover_beep_driver = {
4018294b GL	344	.driver = {
	345	.name = "groverbeep",
	346	.owner = THIS_MODULE,
	347	.of_match_table = grover_beep_match,
	348	},
9c1a5077 DM	349	.probe = grover_beep_probe,
9c1a5077 DM	350	.remove = __devexit_p(grover_remove),
a2bd4fd1 DM	351	.shutdown = sparcspkr_shutdown,
a2bd4fd1 DM	352	};
1da177e4 LT	353
	354	static int __init sparcspkr_init(void)
	355	{
1ab1d63a	356	int err = of_register_platform_driver(&bbc_beep_driver);
a2bd4fd1 DM	357
a2bd4fd1 DM	358	if (!err) {
1ab1d63a	359	err = of_register_platform_driver(&grover_beep_driver);
a2bd4fd1	360	if (err)
1ab1d63a	361	of_unregister_platform_driver(&bbc_beep_driver);
1da177e4	362	}
1da177e4	363
a2bd4fd1	364	return err;
1da177e4 LT	365	}
	366
	367	static void __exit sparcspkr_exit(void)
	368	{
1ab1d63a GL	369	of_unregister_platform_driver(&bbc_beep_driver);
1ab1d63a GL	370	of_unregister_platform_driver(&grover_beep_driver);
1da177e4 LT	371	}
	372
	373	module_init(sparcspkr_init);
	374	module_exit(sparcspkr_exit);