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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 <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");
static unsigned long beep_iobase;
static struct input_dev *sparcspkr_dev;
DEFINE_SPINLOCK(beep_lock);
static void __init init_sparcspkr_struct(void)
{
sparcspkr_dev->evbit[0] = BIT(EV_SND);
sparcspkr_dev->sndbit[0] = BIT(SND_BELL) | BIT(SND_TONE);
sparcspkr_dev->phys = "sparc/input0";
sparcspkr_dev->id.bustype = BUS_ISA;
sparcspkr_dev->id.vendor = 0x001f;
sparcspkr_dev->id.product = 0x0001;
sparcspkr_dev->id.version = 0x0100;
}
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 (count) {
if (beep_iobase & 0x2UL)
outb(1, beep_iobase);
else
outl(1, beep_iobase);
} else {
if (beep_iobase & 0x2UL)
outb(0, beep_iobase);
else
outl(0, beep_iobase);
}
spin_unlock_irqrestore(&beep_lock, flags);
return 0;
}
static int __init init_ebus_beep(struct linux_ebus_device *edev)
{
beep_iobase = edev->resource[0].start;
sparcspkr_dev = input_allocate_device();
if (!sparcspkr_dev)
return -ENOMEM;
sparcspkr_dev->name = "Sparc EBUS Speaker";
sparcspkr_dev->event = ebus_spkr_event;
input_register_device(sparcspkr_dev);
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;
}
static int __init init_isa_beep(struct sparc_isa_device *isa_dev)
{
beep_iobase = isa_dev->resource.start;
sparcspkr_dev = input_allocate_device();
if (!sparcspkr_dev)
return -ENOMEM;
init_sparcspkr_struct();
sparcspkr_dev->name = "Sparc ISA Speaker";
sparcspkr_dev->event = isa_spkr_event;
input_register_device(&sparcspkr_dev);
return 0;
}
#endif
static int __init sparcspkr_init(void)
{
struct linux_ebus *ebus;
struct linux_ebus_device *edev = NULL;
#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"))
return init_ebus_beep(edev);
}
}
#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"))
return init_isa_beep(isa_dev);
}
}
#endif
return -ENODEV;
}
static void __exit sparcspkr_exit(void)
{
input_unregister_device(sparcspkr_dev);
}
module_init(sparcspkr_init);
module_exit(sparcspkr_exit);
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