[linux-block.git] / drivers / input / misc / sparcspkr.c

// SPDX-License-Identifier: GPL-2.0-only
/*
 *  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) {
		sbus_writeb(0x01,                 info->regs + 0);
		sbus_writeb(0x00,                 info->regs + 2);
		sbus_writeb((count >> 16) & 0xff, info->regs + 3);
		sbus_writeb((count >>  8) & 0xff, info->regs + 4);
		sbus_writeb(0x00,                 info->regs + 5);
	} else {
		sbus_writeb(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 */
		sbus_writeb(sbus_readb(info->enable_reg) | 3, info->enable_reg);
		/* set command for counter 2, 2 byte write */
		sbus_writeb(0xB6, info->freq_regs + 1);
		/* select desired HZ */
		sbus_writeb(count & 0xff, info->freq_regs + 0);
		sbus_writeb((count >> 8) & 0xff, info->freq_regs + 0);
	} else {
		/* disable counter 2 */
		sbus_writeb(sbus_readb(info->enable_reg) & 0xFC, info->enable_reg);
	}

	spin_unlock_irqrestore(&state->lock, flags);

	return 0;
}

static int 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 void sparcspkr_shutdown(struct platform_device *dev)
{
	struct sparcspkr_state *state = platform_get_drvdata(dev);
	struct input_dev *input_dev = state->input_dev;

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

static int bbc_beep_probe(struct platform_device *op)
{
	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;

	platform_set_drvdata(op, state);

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

	return 0;

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

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

static int bbc_remove(struct platform_device *op)
{
	struct sparcspkr_state *state = platform_get_drvdata(op);
	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);

	kfree(state);

	return 0;
}

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

static struct platform_driver bbc_beep_driver = {
	.driver = {
		.name = "bbcbeep",
		.of_match_table = bbc_beep_match,
	},
	.probe		= bbc_beep_probe,
	.remove		= bbc_remove,
	.shutdown	= sparcspkr_shutdown,
};

static int grover_beep_probe(struct platform_device *op)
{
	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;

	platform_set_drvdata(op, state);

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

	return 0;

out_clear_drvdata:
	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 grover_remove(struct platform_device *op)
{
	struct sparcspkr_state *state = platform_get_drvdata(op);
	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);

	kfree(state);

	return 0;
}

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

static struct platform_driver grover_beep_driver = {
	.driver = {
		.name = "groverbeep",
		.of_match_table = grover_beep_match,
	},
	.probe		= grover_beep_probe,
	.remove		= grover_remove,
	.shutdown	= sparcspkr_shutdown,
};

static struct platform_driver * const drivers[] = {
	&bbc_beep_driver,
	&grover_beep_driver,
};

static int __init sparcspkr_init(void)
{
	return platform_register_drivers(drivers, ARRAY_SIZE(drivers));
}

static void __exit sparcspkr_exit(void)
{
	platform_unregister_drivers(drivers, ARRAY_SIZE(drivers));
}

module_init(sparcspkr_init);
module_exit(sparcspkr_exit);
Commit	Line	Data
09c434b8	1	// SPDX-License-Identifier: GPL-2.0-only
1da177e4 LT	2	/*
	3	* Driver for PC-speaker like devices found on various Sparc systems.
	4	*
	5	* Copyright (c) 2002 Vojtech Pavlik
9c1a5077	6	* Copyright (c) 2002, 2006, 2008 David S. Miller (davem@davemloft.net)
1da177e4	7	*/
1da177e4 LT	8	#include <linux/kernel.h>
	9	#include <linux/module.h>
	10	#include <linux/init.h>
	11	#include <linux/input.h>
9c1a5077	12	#include <linux/of_device.h>
5a0e3ad6	13	#include <linux/slab.h>
1da177e4 LT	14
1da177e4 LT	15	#include <asm/io.h>
1da177e4	16
a2bd4fd1	17	MODULE_AUTHOR("David S. Miller <davem@davemloft.net>");
76b7cddf	18	MODULE_DESCRIPTION("Sparc Speaker beeper driver");
1da177e4 LT	19	MODULE_LICENSE("GPL");
1da177e4 LT	20
9c1a5077 DM	21	struct grover_beep_info {
	22	void __iomem *freq_regs;
	23	void __iomem *enable_reg;
	24	};
	25
	26	struct bbc_beep_info {
	27	u32 clock_freq;
	28	void __iomem *regs;
	29	};
	30
a2bd4fd1 DM	31	struct sparcspkr_state {
a2bd4fd1 DM	32	const char *name;
a2bd4fd1 DM	33	int (event)(struct input_dev dev, unsigned int type, unsigned int code, int value);
	34	spinlock_t lock;
	35	struct input_dev *input_dev;
9c1a5077 DM	36	union {
	37	struct grover_beep_info grover;
	38	struct bbc_beep_info bbc;
	39	} u;
a2bd4fd1	40	};
1da177e4	41
9c1a5077 DM	42	static u32 bbc_count_to_reg(struct bbc_beep_info *info, unsigned int count)
	43	{
	44	u32 val, clock_freq = info->clock_freq;
	45	int i;
	46
	47	if (!count)
	48	return 0;
	49
	50	if (count <= clock_freq >> 20)
	51	return 1 << 18;
	52
	53	if (count >= clock_freq >> 12)
	54	return 1 << 10;
	55
	56	val = 1 << 18;
	57	for (i = 19; i >= 11; i--) {
	58	val >>= 1;
	59	if (count <= clock_freq >> i)
	60	break;
	61	}
	62
	63	return val;
	64	}
	65
	66	static int bbc_spkr_event(struct input_dev *dev, unsigned int type, unsigned int code, int value)
1da177e4	67	{
293e6392	68	struct sparcspkr_state *state = dev_get_drvdata(dev->dev.parent);
9c1a5077	69	struct bbc_beep_info *info = &state->u.bbc;
1da177e4 LT	70	unsigned int count = 0;
	71	unsigned long flags;
	72
	73	if (type != EV_SND)
	74	return -1;
	75
	76	switch (code) {
	77	case SND_BELL: if (value) value = 1000;
	78	case SND_TONE: break;
	79	default: return -1;
	80	}
	81
	82	if (value > 20 && value < 32767)
	83	count = 1193182 / value;
	84
9c1a5077 DM	85	count = bbc_count_to_reg(info, count);
9c1a5077 DM	86
a2bd4fd1	87	spin_lock_irqsave(&state->lock, flags);
1da177e4	88
9c1a5077	89	if (count) {
d650471a SR	90	sbus_writeb(0x01, info->regs + 0);
	91	sbus_writeb(0x00, info->regs + 2);
	92	sbus_writeb((count >> 16) & 0xff, info->regs + 3);
	93	sbus_writeb((count >> 8) & 0xff, info->regs + 4);
	94	sbus_writeb(0x00, info->regs + 5);
9c1a5077	95	} else {
d650471a	96	sbus_writeb(0x00, info->regs + 0);
9c1a5077	97	}
1da177e4	98
a2bd4fd1	99	spin_unlock_irqrestore(&state->lock, flags);
1da177e4 LT	100
	101	return 0;
	102	}
	103
9c1a5077	104	static int grover_spkr_event(struct input_dev *dev, unsigned int type, unsigned int code, int value)
1da177e4	105	{
293e6392	106	struct sparcspkr_state *state = dev_get_drvdata(dev->dev.parent);
9c1a5077	107	struct grover_beep_info *info = &state->u.grover;
1da177e4 LT	108	unsigned int count = 0;
	109	unsigned long flags;
	110
	111	if (type != EV_SND)
	112	return -1;
	113
	114	switch (code) {
	115	case SND_BELL: if (value) value = 1000;
	116	case SND_TONE: break;
	117	default: return -1;
	118	}
	119
	120	if (value > 20 && value < 32767)
	121	count = 1193182 / value;
	122
a2bd4fd1	123	spin_lock_irqsave(&state->lock, flags);
1da177e4 LT	124
	125	if (count) {
	126	/* enable counter 2 */
d650471a	127	sbus_writeb(sbus_readb(info->enable_reg) \| 3, info->enable_reg);
1da177e4	128	/* set command for counter 2, 2 byte write */
d650471a	129	sbus_writeb(0xB6, info->freq_regs + 1);
1da177e4	130	/* select desired HZ */
d650471a SR	131	sbus_writeb(count & 0xff, info->freq_regs + 0);
d650471a SR	132	sbus_writeb((count >> 8) & 0xff, info->freq_regs + 0);
1da177e4 LT	133	} else {
1da177e4 LT	134	/* disable counter 2 */
d650471a	135	sbus_writeb(sbus_readb(info->enable_reg) & 0xFC, info->enable_reg);
1da177e4 LT	136	}
1da177e4 LT	137
a2bd4fd1	138	spin_unlock_irqrestore(&state->lock, flags);
1da177e4 LT	139
	140	return 0;
	141	}
	142
5298cc4c	143	static int sparcspkr_probe(struct device *dev)
1da177e4	144	{
a2bd4fd1	145	struct sparcspkr_state *state = dev_get_drvdata(dev);
f5b64078 DT	146	struct input_dev *input_dev;
f5b64078 DT	147	int error;
1da177e4	148
f5b64078 DT	149	input_dev = input_allocate_device();
f5b64078 DT	150	if (!input_dev)
76b7cddf DT	151	return -ENOMEM;
76b7cddf DT	152
a2bd4fd1	153	input_dev->name = state->name;
f5b64078 DT	154	input_dev->phys = "sparc/input0";
	155	input_dev->id.bustype = BUS_ISA;
	156	input_dev->id.vendor = 0x001f;
	157	input_dev->id.product = 0x0001;
	158	input_dev->id.version = 0x0100;
293e6392	159	input_dev->dev.parent = dev;
1da177e4	160
7b19ada2 JS	161	input_dev->evbit[0] = BIT_MASK(EV_SND);
7b19ada2 JS	162	input_dev->sndbit[0] = BIT_MASK(SND_BELL) \| BIT_MASK(SND_TONE);
1da177e4	163
a2bd4fd1	164	input_dev->event = state->event;
f5b64078 DT	165
	166	error = input_register_device(input_dev);
	167	if (error) {
	168	input_free_device(input_dev);
	169	return error;
	170	}
	171
a2bd4fd1	172	state->input_dev = input_dev;
1da177e4	173
1da177e4 LT	174	return 0;
1da177e4 LT	175	}
f5b64078	176
4ebb24f7	177	static void sparcspkr_shutdown(struct platform_device *dev)
f5b64078	178	{
35c4b122	179	struct sparcspkr_state *state = platform_get_drvdata(dev);
a2bd4fd1	180	struct input_dev *input_dev = state->input_dev;
f5b64078	181
f5b64078	182	/* turn off the speaker */
a2bd4fd1	183	state->event(input_dev, EV_SND, SND_BELL, 0);
f5b64078 DT	184	}
f5b64078 DT	185
5298cc4c	186	static int bbc_beep_probe(struct platform_device *op)
f5b64078	187	{
9c1a5077 DM	188	struct sparcspkr_state *state;
	189	struct bbc_beep_info *info;
	190	struct device_node *dp;
	191	int err = -ENOMEM;
a2bd4fd1	192
9c1a5077 DM	193	state = kzalloc(sizeof(*state), GFP_KERNEL);
	194	if (!state)
	195	goto out_err;
	196
	197	state->name = "Sparc BBC Speaker";
	198	state->event = bbc_spkr_event;
	199	spin_lock_init(&state->lock);
	200
	201	dp = of_find_node_by_path("/");
	202	err = -ENODEV;
	203	if (!dp)
	204	goto out_free;
	205
	206	info = &state->u.bbc;
	207	info->clock_freq = of_getintprop_default(dp, "clock-frequency", 0);
	208	if (!info->clock_freq)
	209	goto out_free;
	210
	211	info->regs = of_ioremap(&op->resource[0], 0, 6, "bbc beep");
	212	if (!info->regs)
	213	goto out_free;
	214
35c4b122	215	platform_set_drvdata(op, state);
9c1a5077 DM	216
	217	err = sparcspkr_probe(&op->dev);
	218	if (err)
	219	goto out_clear_drvdata;
a2bd4fd1 DM	220
a2bd4fd1 DM	221	return 0;
9c1a5077 DM	222
9c1a5077 DM	223	out_clear_drvdata:
9c1a5077 DM	224	of_iounmap(&op->resource[0], info->regs, 6);
	225
	226	out_free:
	227	kfree(state);
	228	out_err:
	229	return err;
a2bd4fd1 DM	230	}
a2bd4fd1 DM	231
e2619cf7	232	static int bbc_remove(struct platform_device *op)
a2bd4fd1	233	{
35c4b122	234	struct sparcspkr_state *state = platform_get_drvdata(op);
9c1a5077 DM	235	struct input_dev *input_dev = state->input_dev;
9c1a5077 DM	236	struct bbc_beep_info *info = &state->u.bbc;
a2bd4fd1	237
9c1a5077 DM	238	/* turn off the speaker */
9c1a5077 DM	239	state->event(input_dev, EV_SND, SND_BELL, 0);
a2bd4fd1	240
9c1a5077	241	input_unregister_device(input_dev);
a2bd4fd1	242
9c1a5077	243	of_iounmap(&op->resource[0], info->regs, 6);
a2bd4fd1	244
9c1a5077	245	kfree(state);
a2bd4fd1 DM	246
a2bd4fd1 DM	247	return 0;
f5b64078 DT	248	}
f5b64078 DT	249
fd098316	250	static const struct of_device_id bbc_beep_match[] = {
a2bd4fd1 DM	251	{
a2bd4fd1 DM	252	.name = "beep",
9c1a5077	253	.compatible = "SUNW,bbc-beep",
f5b64078	254	},
a2bd4fd1	255	{},
f5b64078	256	};
26492f19	257	MODULE_DEVICE_TABLE(of, bbc_beep_match);
f5b64078	258
4ebb24f7	259	static struct platform_driver bbc_beep_driver = {
4018294b GL	260	.driver = {
4018294b GL	261	.name = "bbcbeep",
4018294b GL	262	.of_match_table = bbc_beep_match,
4018294b GL	263	},
9c1a5077	264	.probe = bbc_beep_probe,
1cb0aa88	265	.remove = bbc_remove,
a2bd4fd1 DM	266	.shutdown = sparcspkr_shutdown,
a2bd4fd1 DM	267	};
f5b64078	268
5298cc4c	269	static int grover_beep_probe(struct platform_device *op)
f5b64078	270	{
a2bd4fd1	271	struct sparcspkr_state *state;
9c1a5077 DM	272	struct grover_beep_info *info;
9c1a5077 DM	273	int err = -ENOMEM;
f5b64078	274
a2bd4fd1 DM	275	state = kzalloc(sizeof(*state), GFP_KERNEL);
a2bd4fd1 DM	276	if (!state)
9c1a5077	277	goto out_err;
f5b64078	278
9c1a5077 DM	279	state->name = "Sparc Grover Speaker";
9c1a5077 DM	280	state->event = grover_spkr_event;
a2bd4fd1 DM	281	spin_lock_init(&state->lock);
a2bd4fd1 DM	282
9c1a5077 DM	283	info = &state->u.grover;
	284	info->freq_regs = of_ioremap(&op->resource[2], 0, 2, "grover beep freq");
	285	if (!info->freq_regs)
	286	goto out_free;
f5b64078	287
9c1a5077 DM	288	info->enable_reg = of_ioremap(&op->resource[3], 0, 1, "grover beep enable");
	289	if (!info->enable_reg)
	290	goto out_unmap_freq_regs;
	291
35c4b122	292	platform_set_drvdata(op, state);
9c1a5077 DM	293
	294	err = sparcspkr_probe(&op->dev);
	295	if (err)
	296	goto out_clear_drvdata;
	297
	298	return 0;
	299
	300	out_clear_drvdata:
9c1a5077 DM	301	of_iounmap(&op->resource[3], info->enable_reg, 1);
	302
	303	out_unmap_freq_regs:
	304	of_iounmap(&op->resource[2], info->freq_regs, 2);
	305	out_free:
	306	kfree(state);
	307	out_err:
	308	return err;
	309	}
	310
e2619cf7	311	static int grover_remove(struct platform_device *op)
9c1a5077	312	{
35c4b122	313	struct sparcspkr_state *state = platform_get_drvdata(op);
9c1a5077 DM	314	struct grover_beep_info *info = &state->u.grover;
	315	struct input_dev *input_dev = state->input_dev;
	316
	317	/* turn off the speaker */
	318	state->event(input_dev, EV_SND, SND_BELL, 0);
	319
	320	input_unregister_device(input_dev);
	321
	322	of_iounmap(&op->resource[3], info->enable_reg, 1);
	323	of_iounmap(&op->resource[2], info->freq_regs, 2);
	324
9c1a5077	325	kfree(state);
f5b64078 DT	326
f5b64078 DT	327	return 0;
a2bd4fd1	328	}
f5b64078	329
fd098316	330	static const struct of_device_id grover_beep_match[] = {
a2bd4fd1	331	{
9c1a5077 DM	332	.name = "beep",
9c1a5077 DM	333	.compatible = "SUNW,smbus-beep",
a2bd4fd1 DM	334	},
	335	{},
	336	};
26492f19	337	MODULE_DEVICE_TABLE(of, grover_beep_match);
f5b64078	338
4ebb24f7	339	static struct platform_driver grover_beep_driver = {
4018294b GL	340	.driver = {
4018294b GL	341	.name = "groverbeep",
4018294b GL	342	.of_match_table = grover_beep_match,
4018294b GL	343	},
9c1a5077	344	.probe = grover_beep_probe,
1cb0aa88	345	.remove = grover_remove,
a2bd4fd1 DM	346	.shutdown = sparcspkr_shutdown,
a2bd4fd1 DM	347	};
1da177e4	348
d352c0e1 TR	349	static struct platform_driver * const drivers[] = {
	350	&bbc_beep_driver,
	351	&grover_beep_driver,
	352	};
	353
1da177e4 LT	354	static int __init sparcspkr_init(void)
1da177e4 LT	355	{
d352c0e1	356	return platform_register_drivers(drivers, ARRAY_SIZE(drivers));
1da177e4 LT	357	}
	358
	359	static void __exit sparcspkr_exit(void)
	360	{
d352c0e1	361	platform_unregister_drivers(drivers, ARRAY_SIZE(drivers));
1da177e4 LT	362	}
	363
	364	module_init(sparcspkr_init);
	365	module_exit(sparcspkr_exit);