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 ba0e88c64e1ef93befa1c6e0f4483845cb88ebb2..41b42587f5e96e330df17404623cef2a74246554 100644 (file)
--- a/drivers/input/misc/Kconfig
+++ b/drivers/input/misc/Kconfig
@@ -50,6 +50,16 @@ config INPUT_WISTRON_BTNS
          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 415c49178985d6fe0f4547e3457f090d4a18820a..e0a8d58c9e9b3125a6531f64b0043a66385dfd42 100644 (file)
--- a/drivers/input/misc/Makefile
+++ b/drivers/input/misc/Makefile
@@ -9,5 +9,6 @@ obj-$(CONFIG_INPUT_PCSPKR)              += pcspkr.o
 obj-$(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 (file)
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");
+