(2006-08-06) rescue-bootcd

extra/linux-2.6.10/drivers/input/misc/sparcspkr.c

@@ -0,0 +1,189 @@
+/*
+ *  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("PC Speaker beeper driver");
+MODULE_LICENSE("GPL");
+
+static unsigned long beep_iobase;
+
+static char *sparcspkr_isa_name = "Sparc ISA Speaker";
+static char *sparcspkr_ebus_name = "Sparc EBUS Speaker";
+static char *sparcspkr_phys = "sparc/input0";
+static struct input_dev sparcspkr_dev;
+
+spinlock_t beep_lock = SPIN_LOCK_UNLOCKED;
+
+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 = sparcspkr_phys;
+	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;
+
+	init_sparcspkr_struct();
+
+	sparcspkr_dev.name = sparcspkr_ebus_name;
+	sparcspkr_dev.event = ebus_spkr_event;
+
+	input_register_device(&sparcspkr_dev);
+
+        printk(KERN_INFO "input: %s\n", sparcspkr_ebus_name);
+	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;
+
+	init_sparcspkr_struct();
+
+	sparcspkr_dev.name = sparcspkr_isa_name;
+	sparcspkr_dev.event = isa_spkr_event;
+	sparcspkr_dev.id.bustype = BUS_ISA;
+
+	input_register_device(&sparcspkr_dev);
+
+        printk(KERN_INFO "input: %s\n", sparcspkr_isa_name);
+	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);