diff options
Diffstat (limited to 'drivers/input/misc/sparcspkr.c')
| -rw-r--r-- | drivers/input/misc/sparcspkr.c | 189 |
1 files changed, 189 insertions, 0 deletions
diff --git a/drivers/input/misc/sparcspkr.c b/drivers/input/misc/sparcspkr.c new file mode 100644 index 000000000000..cdc3fb3d5f46 --- /dev/null +++ b/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; + +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 = 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); |