Input: add Atlas button driver
This patch adds support for the buttons on the Atlas wallmount
touchscreen.
Signed-off-by: Jaya Kumar <jayakumar.acpi@gmail.com>
Acked-by: Len Brown <len.brown@intel.com>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
diff --git a/drivers/input/misc/Kconfig b/drivers/input/misc/Kconfig
index ba0e88c..41b4258 100644
--- a/drivers/input/misc/Kconfig
+++ b/drivers/input/misc/Kconfig
@@ -50,6 +50,16 @@
To compile this driver as a module, choose M here: the module will
be called wistron_btns.
+config INPUT_ATLAS_BTNS
+ tristate "x86 Atlas button interface"
+ depends on X86 && ACPI
+ help
+ Say Y here for support of Atlas wallmount touchscreen buttons.
+ The events will show up as scancodes F1 through F9 via evdev.
+
+ To compile this driver as a module, choose M here: the module will
+ be called atlas_btns.
+
config INPUT_IXP4XX_BEEPER
tristate "IXP4XX Beeper support"
depends on ARCH_IXP4XX
diff --git a/drivers/input/misc/Makefile b/drivers/input/misc/Makefile
index 415c491..e0a8d58 100644
--- a/drivers/input/misc/Makefile
+++ b/drivers/input/misc/Makefile
@@ -9,5 +9,6 @@
obj-$(CONFIG_INPUT_M68K_BEEP) += m68kspkr.o
obj-$(CONFIG_INPUT_UINPUT) += uinput.o
obj-$(CONFIG_INPUT_WISTRON_BTNS) += wistron_btns.o
+obj-$(CONFIG_INPUT_ATLAS_BTNS) += atlas_btns.o
obj-$(CONFIG_HP_SDC_RTC) += hp_sdc_rtc.o
obj-$(CONFIG_INPUT_IXP4XX_BEEPER) += ixp4xx-beeper.o
diff --git a/drivers/input/misc/atlas_btns.c b/drivers/input/misc/atlas_btns.c
new file mode 100644
index 0000000..0acc3a1
--- /dev/null
+++ b/drivers/input/misc/atlas_btns.c
@@ -0,0 +1,170 @@
+/*
+ * atlas_btns.c - Atlas Wallmount Touchscreen ACPI Extras
+ *
+ * Copyright (C) 2006 Jaya Kumar
+ * Based on Toshiba ACPI by John Belmonte and ASUS ACPI
+ * This work was sponsored by CIS(M) Sdn Bhd.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ *
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/input.h>
+#include <linux/types.h>
+#include <asm/uaccess.h>
+#include <acpi/acpi_drivers.h>
+
+#define ACPI_ATLAS_NAME "Atlas ACPI"
+#define ACPI_ATLAS_CLASS "Atlas"
+#define ACPI_ATLAS_BUTTON_HID "ASIM0000"
+
+static struct input_dev *input_dev;
+
+/* button handling code */
+static acpi_status acpi_atlas_button_setup(acpi_handle region_handle,
+ u32 function, void *handler_context, void **return_context)
+{
+ *return_context =
+ (function != ACPI_REGION_DEACTIVATE) ? handler_context : NULL;
+
+ return AE_OK;
+}
+
+static acpi_status acpi_atlas_button_handler(u32 function,
+ acpi_physical_address address,
+ u32 bit_width, acpi_integer *value,
+ void *handler_context, void *region_context)
+{
+ acpi_status status;
+ int keycode;
+
+ if (function == ACPI_WRITE) {
+ keycode = KEY_F1 + (address & 0x0F);
+ input_report_key(input_dev, keycode, !(address & 0x10));
+ input_sync(input_dev);
+ status = 0;
+ } else {
+ printk(KERN_WARNING "atlas: shrugged on unexpected function"
+ ":function=%x,address=%lx,value=%x\n",
+ function, (unsigned long)address, (u32)*value);
+ status = -EINVAL;
+ }
+
+ return status;
+}
+
+static int atlas_acpi_button_add(struct acpi_device *device)
+{
+ acpi_status status;
+ int err;
+
+ input_dev = input_allocate_device();
+ if (!input_dev) {
+ printk(KERN_ERR "atlas: unable to allocate input device\n");
+ return -ENOMEM;
+ }
+
+ input_dev->name = "Atlas ACPI button driver";
+ input_dev->phys = "ASIM0000/atlas/input0";
+ input_dev->id.bustype = BUS_HOST;
+ input_dev->evbit[LONG(EV_KEY)] = BIT(EV_KEY);
+
+ set_bit(KEY_F1, input_dev->keybit);
+ set_bit(KEY_F2, input_dev->keybit);
+ set_bit(KEY_F3, input_dev->keybit);
+ set_bit(KEY_F4, input_dev->keybit);
+ set_bit(KEY_F5, input_dev->keybit);
+ set_bit(KEY_F6, input_dev->keybit);
+ set_bit(KEY_F7, input_dev->keybit);
+ set_bit(KEY_F8, input_dev->keybit);
+ set_bit(KEY_F9, input_dev->keybit);
+
+ err = input_register_device(input_dev);
+ if (err) {
+ printk(KERN_ERR "atlas: couldn't register input device\n");
+ input_free_device(input_dev);
+ return err;
+ }
+
+ /* hookup button handler */
+ status = acpi_install_address_space_handler(device->handle,
+ 0x81, &acpi_atlas_button_handler,
+ &acpi_atlas_button_setup, device);
+ if (ACPI_FAILURE(status)) {
+ printk(KERN_ERR "Atlas: Error installing addr spc handler\n");
+ input_unregister_device(input_dev);
+ status = -EINVAL;
+ }
+
+ return status;
+}
+
+static int atlas_acpi_button_remove(struct acpi_device *device, int type)
+{
+ acpi_status status;
+
+ status = acpi_remove_address_space_handler(device->handle,
+ 0x81, &acpi_atlas_button_handler);
+ if (ACPI_FAILURE(status)) {
+ printk(KERN_ERR "Atlas: Error removing addr spc handler\n");
+ status = -EINVAL;
+ }
+
+ input_unregister_device(input_dev);
+
+ return status;
+}
+
+static struct acpi_driver atlas_acpi_driver = {
+ .name = ACPI_ATLAS_NAME,
+ .class = ACPI_ATLAS_CLASS,
+ .ids = ACPI_ATLAS_BUTTON_HID,
+ .ops = {
+ .add = atlas_acpi_button_add,
+ .remove = atlas_acpi_button_remove,
+ },
+};
+
+static int __init atlas_acpi_init(void)
+{
+ int result;
+
+ if (acpi_disabled)
+ return -ENODEV;
+
+ result = acpi_bus_register_driver(&atlas_acpi_driver);
+ if (result < 0) {
+ printk(KERN_ERR "Atlas ACPI: Unable to register driver\n");
+ return -ENODEV;
+ }
+
+ return 0;
+}
+
+static void __exit atlas_acpi_exit(void)
+{
+ acpi_bus_unregister_driver(&atlas_acpi_driver);
+}
+
+module_init(atlas_acpi_init);
+module_exit(atlas_acpi_exit);
+
+MODULE_AUTHOR("Jaya Kumar");
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("Atlas button driver");
+