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https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
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74521c28e5
The Jazz machines have to use the PIT timer for dyntick and highresolution kernels. This may break because currently just like i386 used to do MIPS uses two separate spinlocks in the actual PIT code and the PC speaker code. So switch to do it the same that x86 currently does PIT locking. Signed-off-by: Ralf Baechle <ralf@linux-mips.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
152 lines
3.3 KiB
C
152 lines
3.3 KiB
C
/*
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* PC Speaker beeper driver for Linux
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*
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* Copyright (c) 2002 Vojtech Pavlik
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* Copyright (c) 1992 Orest Zborowski
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*
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*/
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/*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 as published by
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* the Free Software Foundation
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*/
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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 <linux/platform_device.h>
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#include <asm/io.h>
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MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
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MODULE_DESCRIPTION("PC Speaker beeper driver");
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MODULE_LICENSE("GPL");
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MODULE_ALIAS("platform:pcspkr");
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#if defined(CONFIG_MIPS) || defined(CONFIG_X86)
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/* Use the global PIT lock ! */
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#include <asm/i8253.h>
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#else
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#include <asm/8253pit.h>
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static DEFINE_SPINLOCK(i8253_lock);
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#endif
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static int pcspkr_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 = PIT_TICK_RATE / value;
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spin_lock_irqsave(&i8253_lock, flags);
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if (count) {
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/* enable counter 2 */
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outb_p(inb_p(0x61) | 3, 0x61);
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/* set command for counter 2, 2 byte write */
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outb_p(0xB6, 0x43);
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/* select desired HZ */
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outb_p(count & 0xff, 0x42);
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outb((count >> 8) & 0xff, 0x42);
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} else {
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/* disable counter 2 */
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outb(inb_p(0x61) & 0xFC, 0x61);
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}
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spin_unlock_irqrestore(&i8253_lock, flags);
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return 0;
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}
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static int __devinit pcspkr_probe(struct platform_device *dev)
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{
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struct input_dev *pcspkr_dev;
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int err;
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pcspkr_dev = input_allocate_device();
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if (!pcspkr_dev)
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return -ENOMEM;
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pcspkr_dev->name = "PC Speaker";
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pcspkr_dev->phys = "isa0061/input0";
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pcspkr_dev->id.bustype = BUS_ISA;
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pcspkr_dev->id.vendor = 0x001f;
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pcspkr_dev->id.product = 0x0001;
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pcspkr_dev->id.version = 0x0100;
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pcspkr_dev->dev.parent = &dev->dev;
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pcspkr_dev->evbit[0] = BIT_MASK(EV_SND);
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pcspkr_dev->sndbit[0] = BIT_MASK(SND_BELL) | BIT_MASK(SND_TONE);
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pcspkr_dev->event = pcspkr_event;
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err = input_register_device(pcspkr_dev);
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if (err) {
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input_free_device(pcspkr_dev);
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return err;
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}
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platform_set_drvdata(dev, pcspkr_dev);
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return 0;
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}
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static int __devexit pcspkr_remove(struct platform_device *dev)
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{
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struct input_dev *pcspkr_dev = platform_get_drvdata(dev);
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input_unregister_device(pcspkr_dev);
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platform_set_drvdata(dev, NULL);
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/* turn off the speaker */
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pcspkr_event(NULL, EV_SND, SND_BELL, 0);
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return 0;
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}
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static int pcspkr_suspend(struct platform_device *dev, pm_message_t state)
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{
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pcspkr_event(NULL, EV_SND, SND_BELL, 0);
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return 0;
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}
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static void pcspkr_shutdown(struct platform_device *dev)
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{
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/* turn off the speaker */
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pcspkr_event(NULL, EV_SND, SND_BELL, 0);
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}
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static struct platform_driver pcspkr_platform_driver = {
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.driver = {
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.name = "pcspkr",
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.owner = THIS_MODULE,
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},
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.probe = pcspkr_probe,
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.remove = __devexit_p(pcspkr_remove),
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.suspend = pcspkr_suspend,
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.shutdown = pcspkr_shutdown,
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};
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static int __init pcspkr_init(void)
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{
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return platform_driver_register(&pcspkr_platform_driver);
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}
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static void __exit pcspkr_exit(void)
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{
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platform_driver_unregister(&pcspkr_platform_driver);
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}
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module_init(pcspkr_init);
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module_exit(pcspkr_exit);
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