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/*
* Driver for PC-speaker like devices found on various Sparc systems.
*
* Copyright (c) 2002 Vojtech Pavlik
* Copyright (c) 2002 David S. Miller (davem@redhat.com)
*/
#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>
#ifdef CONFIG_SPARC64
#include <asm/isa.h>
#endif
MODULE_AUTHOR("David S. Miller <davem@redhat.com>");
MODULE_DESCRIPTION("Sparc Speaker beeper driver");
MODULE_LICENSE("GPL");
const char *beep_name;
static unsigned long beep_iobase;
static int (*beep_event)(struct input_dev *dev, unsigned int type, unsigned int code, int value);
static DEFINE_SPINLOCK(beep_lock);
static int ebus_spkr_event(struct input_dev *dev, unsigned int type, unsigned int code, int value)
{
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(&beep_lock, flags);
/* EBUS speaker only has on/off state, the frequency does not
* appear to be programmable.
*/
if (beep_iobase & 0x2UL)
outb(!!count, beep_iobase);
else
outl(!!count, beep_iobase);
spin_unlock_irqrestore(&beep_lock, flags);
return 0;
}
#ifdef CONFIG_SPARC64
static int isa_spkr_event(struct input_dev *dev, unsigned int type, unsigned int code, int value)
{
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(&beep_lock, flags);
if (count) {
/* enable counter 2 */
outb(inb(beep_iobase + 0x61) | 3, beep_iobase + 0x61);
/* set command for counter 2, 2 byte write */
outb(0xB6, beep_iobase + 0x43);
/* select desired HZ */
outb(count & 0xff, beep_iobase + 0x42);
outb((count >> 8) & 0xff, beep_iobase + 0x42);
} else {
/* disable counter 2 */
outb(inb_p(beep_iobase + 0x61) & 0xFC, beep_iobase + 0x61);
}
spin_unlock_irqrestore(&beep_lock, flags);
return 0;
}
#endif
static int __devinit sparcspkr_probe(struct platform_device *dev)
{
struct input_dev *input_dev;
int error;
input_dev = input_allocate_device();
if (!input_dev)
return -ENOMEM;
input_dev->name = beep_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->dev;
input_dev->evbit[0] = BIT(EV_SND);
input_dev->sndbit[0] = BIT(SND_BELL) | BIT(SND_TONE);
input_dev->event = beep_event;
error = input_register_device(input_dev);
if (error) {
input_free_device(input_dev);
return error;
}
platform_set_drvdata(dev, input_dev);
return 0;
}
static int __devexit sparcspkr_remove(struct platform_device *dev)
{
struct input_dev *input_dev = platform_get_drvdata(dev);
input_unregister_device(input_dev);
platform_set_drvdata(dev, NULL);
/* turn off the speaker */
beep_event(NULL, EV_SND, SND_BELL, 0);
return 0;
}
static void sparcspkr_shutdown(struct platform_device *dev)
{
/* turn off the speaker */
beep_event(NULL, EV_SND, SND_BELL, 0);
}
static struct platform_driver sparcspkr_platform_driver = {
.driver = {
.name = "sparcspkr",
.owner = THIS_MODULE,
},
.probe = sparcspkr_probe,
.remove = __devexit_p(sparcspkr_remove),
.shutdown = sparcspkr_shutdown,
};
static struct platform_device *sparcspkr_platform_device;
static int __init sparcspkr_drv_init(void)
{
int error;
error = platform_driver_register(&sparcspkr_platform_driver);
if (error)
return error;
sparcspkr_platform_device = platform_device_alloc("sparcspkr", -1);
if (!sparcspkr_platform_device) {
error = -ENOMEM;
goto err_unregister_driver;
}
error = platform_device_add(sparcspkr_platform_device);
if (error)
goto err_free_device;
return 0;
err_free_device:
platform_device_put(sparcspkr_platform_device);
err_unregister_driver:
platform_driver_unregister(&sparcspkr_platform_driver);
return error;
}
static int __init sparcspkr_init(void)
{
struct linux_ebus *ebus;
struct linux_ebus_device *edev;
#ifdef CONFIG_SPARC64
struct sparc_isa_bridge *isa_br;
struct sparc_isa_device *isa_dev;
#endif
for_each_ebus(ebus) {
for_each_ebusdev(edev, ebus) {
if (!strcmp(edev->prom_name, "beep")) {
beep_name = "Sparc EBUS Speaker";
beep_event = ebus_spkr_event;
beep_iobase = edev->resource[0].start;
return sparcspkr_drv_init();
}
}
}
#ifdef CONFIG_SPARC64
for_each_isa(isa_br) {
for_each_isadev(isa_dev, isa_br) {
/* A hack, the beep device's base lives in
* the DMA isa node.
*/
if (!strcmp(isa_dev->prom_name, "dma")) {
beep_name = "Sparc ISA Speaker";
beep_event = isa_spkr_event,
beep_iobase = isa_dev->resource.start;
return sparcspkr_drv_init();
}
}
}
#endif
return -ENODEV;
}
static void __exit sparcspkr_exit(void)
{
platform_device_unregister(sparcspkr_platform_device);
platform_driver_unregister(&sparcspkr_platform_driver);
}
module_init(sparcspkr_init);
module_exit(sparcspkr_exit);
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