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|
drivers/input/misc/Kconfig | 12 +++
drivers/input/misc/Makefile | 1
drivers/input/misc/nslu2spkr.c | 148 +++++++++++++++++++++++++++++++++++++++++
3 files changed, 161 insertions(+)
--- linux-2.6.15/drivers/input/misc/Kconfig 1970-01-01 00:00:00.000000000 +0000
+++ linux-2.6.15/drivers/input/misc/Kconfig 1970-01-01 00:00:00.000000000 +0000
@@ -40,6 +40,18 @@ config INPUT_M68K_BEEP
tristate "M68k Beeper support"
depends on M68K
+config INPUT_NSLU2_BEEPER
+ tristate "NSLU2 Beeper support"
+ depends on MACH_NSLU2
+ help
+ Say Y here if you want the embedded beeper on the LinkSys NSLU2
+ to be used for bells and whistles.
+
+ If unsure, say Y.
+
+ To compile this driver as a module, choose M here: the
+ module will be called nslu2spkr.
+
config INPUT_UINPUT
tristate "User level driver support"
help
--- linux-2.6.15/drivers/input/misc/Makefile 1970-01-01 00:00:00.000000000 +0000
+++ linux-2.6.15/drivers/input/misc/Makefile 1970-01-01 00:00:00.000000000 +0000
@@ -10,3 +10,4 @@ obj-$(CONFIG_INPUT_M68K_BEEP) += m68ksp
obj-$(CONFIG_INPUT_98SPKR) += 98spkr.o
obj-$(CONFIG_INPUT_UINPUT) += uinput.o
obj-$(CONFIG_HP_SDC_RTC) += hp_sdc_rtc.o
+obj-$(CONFIG_INPUT_NSLU2_BEEPER) += nslu2spkr.o
--- linux-2.6.15/drivers/input/misc/nslu2spkr.c 1970-01-01 00:00:00.000000000 +0000
+++ linux-2.6.15/drivers/input/misc/nslu2spkr.c 1970-01-01 00:00:00.000000000 +0000
@@ -0,0 +1,148 @@
+/*
+ * drivers/input/misc/nslu2spkr.c
+ *
+ * NSLU2 Beeper driver
+ *
+ * Copyright (C) 2005 Tower Technologies
+ *
+ * based on nslu2-io.c
+ * Copyright (C) 2004 Karen Spearel
+ *
+ * Author: Alessandro Zummo <a.zummo@towertech.it>
+ * Maintainers: http://www.nslu2-linux.org/
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ */
+
+#include <linux/config.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/input.h>
+#include <linux/delay.h>
+
+#include <asm/hardware.h>
+#include <asm/irq.h>
+#include <asm/mach-types.h>
+
+static unsigned int beep_on_startup = 1;
+module_param(beep_on_startup, bool, 0);
+MODULE_PARM_DESC(beep_on_startup, "Play a beep on module startup");
+
+DEFINE_SPINLOCK(beep_lock);
+
+static int nslu2_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 = (NSLU2_FREQ / (value*4)) - 1;
+
+ spin_lock_irqsave(&beep_lock, flags);
+
+ if (count) {
+
+ gpio_line_config(NSLU2_GPIO_BUZZ, IXP4XX_GPIO_OUT);
+ gpio_line_set(NSLU2_GPIO_BUZZ, IXP4XX_GPIO_LOW);
+
+ *IXP4XX_OSRT2 = (count & ~IXP4XX_OST_RELOAD_MASK) | IXP4XX_OST_ENABLE;
+
+ } else {
+
+ gpio_line_config(NSLU2_GPIO_BUZZ, IXP4XX_GPIO_IN);
+ gpio_line_set(NSLU2_GPIO_BUZZ, IXP4XX_GPIO_HIGH);
+
+ *IXP4XX_OSRT2 = 0;
+ }
+
+ spin_unlock_irqrestore(&beep_lock, flags);
+
+ return 0;
+}
+
+static struct input_dev nslu2_spkr_dev = {
+ .phys = "ixp420/gpio4",
+ .name = "NSLU2 Beeper",
+ .evbit[0] = BIT(EV_SND),
+ .sndbit[0] = BIT(SND_BELL) | BIT(SND_TONE),
+ .event = nslu2_spkr_event,
+ .id = {
+ .bustype = BUS_HOST,
+ .vendor = 0x001f,
+ .product = 0x0001,
+ .version = 0x0100
+ }
+};
+
+static irqreturn_t nslu2_spkr_handler(int irq, void *dev_id, struct pt_regs *regs)
+{
+ /* clear interrupt */
+ *IXP4XX_OSST = IXP4XX_OSST_TIMER_2_PEND;
+
+ /* flip the beeper output */
+ *IXP4XX_GPIO_GPOUTR ^= NSLU2_BZ_BM;
+
+ return IRQ_HANDLED;
+}
+
+static int __init nslu2_spkr_init(void)
+{
+ if (!(machine_is_nslu2()))
+ return -ENODEV;
+
+ if (request_irq(IRQ_IXP4XX_TIMER2, &nslu2_spkr_handler,
+ SA_INTERRUPT | SA_TIMER, "nslu2-beeper", NULL < 0)) {
+
+ printk(KERN_INFO "NSLU2 beeper: IRQ %d not available\n",
+ IRQ_IXP4XX_TIMER2);
+
+ return -EIO;
+ }
+
+ input_register_device(&nslu2_spkr_dev);
+
+ /* do a little beep to tell the world we are alive */
+ if (beep_on_startup)
+ {
+ nslu2_spkr_event(NULL, EV_SND, SND_TONE, 440);
+ msleep(120);
+ nslu2_spkr_event(NULL, EV_SND, SND_TONE, 0);
+ }
+
+ printk(KERN_INFO "NSLU2: beeper\n");
+ return 0;
+}
+
+static void __exit nslu2_spkr_exit(void)
+{
+ input_unregister_device(&nslu2_spkr_dev);
+
+ disable_irq(IRQ_IXP4XX_TIMER2);
+
+ /* turn it off */
+ nslu2_spkr_event(NULL, EV_SND, SND_BELL, 0);
+
+ free_irq(IRQ_IXP4XX_TIMER2, NULL);
+}
+
+module_init(nslu2_spkr_init);
+module_exit(nslu2_spkr_exit);
+
+MODULE_AUTHOR("Alessandro Zummo <a.zummo@towertech.it>");
+MODULE_DESCRIPTION("NSLU2 Beeper driver");
+MODULE_LICENSE("GPL");
|
