189 lines
4.0 KiB
C
189 lines
4.0 KiB
C
/*
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* Driver for PC-speaker like devices found on various Sparc systems.
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*
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* Copyright (c) 2002 Vojtech Pavlik
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* Copyright (c) 2002 David S. Miller (davem@redhat.com)
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*/
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#include <linux/config.h>
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/input.h>
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#include <asm/io.h>
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#include <asm/ebus.h>
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#ifdef CONFIG_SPARC64
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#include <asm/isa.h>
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#endif
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MODULE_AUTHOR("David S. Miller <davem@redhat.com>");
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MODULE_DESCRIPTION("Sparc Speaker beeper driver");
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MODULE_LICENSE("GPL");
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static unsigned long beep_iobase;
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static struct input_dev *sparcspkr_dev;
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DEFINE_SPINLOCK(beep_lock);
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static void __init init_sparcspkr_struct(void)
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{
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sparcspkr_dev->evbit[0] = BIT(EV_SND);
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sparcspkr_dev->sndbit[0] = BIT(SND_BELL) | BIT(SND_TONE);
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sparcspkr_dev->phys = "sparc/input0";
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sparcspkr_dev->id.bustype = BUS_ISA;
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sparcspkr_dev->id.vendor = 0x001f;
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sparcspkr_dev->id.product = 0x0001;
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sparcspkr_dev->id.version = 0x0100;
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}
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static int ebus_spkr_event(struct input_dev *dev, unsigned int type, unsigned int code, int value)
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{
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unsigned int count = 0;
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unsigned long flags;
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if (type != EV_SND)
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return -1;
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switch (code) {
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case SND_BELL: if (value) value = 1000;
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case SND_TONE: break;
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default: return -1;
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}
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if (value > 20 && value < 32767)
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count = 1193182 / value;
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spin_lock_irqsave(&beep_lock, flags);
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/* EBUS speaker only has on/off state, the frequency does not
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* appear to be programmable.
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*/
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if (count) {
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if (beep_iobase & 0x2UL)
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outb(1, beep_iobase);
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else
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outl(1, beep_iobase);
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} else {
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if (beep_iobase & 0x2UL)
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outb(0, beep_iobase);
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else
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outl(0, beep_iobase);
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}
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spin_unlock_irqrestore(&beep_lock, flags);
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return 0;
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}
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static int __init init_ebus_beep(struct linux_ebus_device *edev)
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{
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beep_iobase = edev->resource[0].start;
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sparcspkr_dev = input_allocate_device();
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if (!sparcspkr_dev)
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return -ENOMEM;
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sparcspkr_dev->name = "Sparc EBUS Speaker";
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sparcspkr_dev->event = ebus_spkr_event;
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input_register_device(sparcspkr_dev);
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return 0;
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}
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#ifdef CONFIG_SPARC64
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static int isa_spkr_event(struct input_dev *dev, unsigned int type, unsigned int code, int value)
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{
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unsigned int count = 0;
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unsigned long flags;
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if (type != EV_SND)
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return -1;
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switch (code) {
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case SND_BELL: if (value) value = 1000;
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case SND_TONE: break;
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default: return -1;
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}
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if (value > 20 && value < 32767)
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count = 1193182 / value;
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spin_lock_irqsave(&beep_lock, flags);
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if (count) {
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/* enable counter 2 */
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outb(inb(beep_iobase + 0x61) | 3, beep_iobase + 0x61);
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/* set command for counter 2, 2 byte write */
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outb(0xB6, beep_iobase + 0x43);
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/* select desired HZ */
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outb(count & 0xff, beep_iobase + 0x42);
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outb((count >> 8) & 0xff, beep_iobase + 0x42);
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} else {
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/* disable counter 2 */
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outb(inb_p(beep_iobase + 0x61) & 0xFC, beep_iobase + 0x61);
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}
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spin_unlock_irqrestore(&beep_lock, flags);
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return 0;
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}
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static int __init init_isa_beep(struct sparc_isa_device *isa_dev)
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{
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beep_iobase = isa_dev->resource.start;
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sparcspkr_dev = input_allocate_device();
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if (!sparcspkr_dev)
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return -ENOMEM;
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init_sparcspkr_struct();
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sparcspkr_dev->name = "Sparc ISA Speaker";
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sparcspkr_dev->event = isa_spkr_event;
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input_register_device(sparcspkr_dev);
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return 0;
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}
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#endif
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static int __init sparcspkr_init(void)
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{
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struct linux_ebus *ebus;
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struct linux_ebus_device *edev = NULL;
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#ifdef CONFIG_SPARC64
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struct sparc_isa_bridge *isa_br;
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struct sparc_isa_device *isa_dev;
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#endif
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for_each_ebus(ebus) {
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for_each_ebusdev(edev, ebus) {
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if (!strcmp(edev->prom_name, "beep"))
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return init_ebus_beep(edev);
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}
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}
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#ifdef CONFIG_SPARC64
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for_each_isa(isa_br) {
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for_each_isadev(isa_dev, isa_br) {
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/* A hack, the beep device's base lives in
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* the DMA isa node.
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*/
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if (!strcmp(isa_dev->prom_name, "dma"))
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return init_isa_beep(isa_dev);
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}
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}
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#endif
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return -ENODEV;
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}
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static void __exit sparcspkr_exit(void)
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{
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input_unregister_device(sparcspkr_dev);
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}
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module_init(sparcspkr_init);
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module_exit(sparcspkr_exit);
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