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/*
* 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/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->dev.parent);
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->dev.parent);
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->dev.parent = 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);
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