drivers/input/misc/sparcspkr.c - third_party/linux - Git at Google

 /*
  *  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 <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 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 bbc_beep_probe(struct of_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 bbc_remove(struct of_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 = {
 	.name		= "bbcbeep",
 	.match_table	= bbc_beep_match,
 	.probe		= bbc_beep_probe,
 	.remove		= __devexit_p(bbc_remove),
 	.shutdown	= sparcspkr_shutdown,
 };

 static int __devinit grover_beep_probe(struct of_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 grover_remove(struct of_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 = {
 	.name		= "groverbeep",
 	.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_driver(&bbc_beep_driver,
 				     &of_platform_bus_type);

 	if (!err) {
 		err = of_register_driver(&grover_beep_driver,
 					 &of_platform_bus_type);
 		if (err)
 			of_unregister_driver(&bbc_beep_driver);
 	}

 	return err;
 }

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

 module_init(sparcspkr_init);
 module_exit(sparcspkr_exit);
	/*
	* 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 <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 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 bbc_beep_probe(struct of_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 bbc_remove(struct of_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 = {
	.name = "bbcbeep",
	.match_table = bbc_beep_match,
	.probe = bbc_beep_probe,
	.remove = __devexit_p(bbc_remove),
	.shutdown = sparcspkr_shutdown,
	};

	static int __devinit grover_beep_probe(struct of_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 grover_remove(struct of_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 = {
	.name = "groverbeep",
	.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_driver(&bbc_beep_driver,
	&of_platform_bus_type);

	if (!err) {
	err = of_register_driver(&grover_beep_driver,
	&of_platform_bus_type);
	if (err)
	of_unregister_driver(&bbc_beep_driver);
	}

	return err;
	}

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

	module_init(sparcspkr_init);
	module_exit(sparcspkr_exit);