diff options
Diffstat (limited to 'drivers/input/misc/atlas_btns.c')
| -rw-r--r-- | drivers/input/misc/atlas_btns.c | 158 |
1 files changed, 158 insertions, 0 deletions
diff --git a/drivers/input/misc/atlas_btns.c b/drivers/input/misc/atlas_btns.c new file mode 100644 index 000000000..6423aaccc --- /dev/null +++ b/drivers/input/misc/atlas_btns.c @@ -0,0 +1,158 @@ +/* + * 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 + * + */ + +#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt + +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/input.h> +#include <linux/types.h> +#include <linux/acpi.h> +#include <linux/uaccess.h> + +#define ACPI_ATLAS_NAME "Atlas ACPI" +#define ACPI_ATLAS_CLASS "Atlas" + +static unsigned short atlas_keymap[16]; +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, u64 *value, + void *handler_context, void *region_context) +{ + acpi_status status; + + if (function == ACPI_WRITE) { + int code = address & 0x0f; + int key_down = !(address & 0x10); + + input_event(input_dev, EV_MSC, MSC_SCAN, code); + input_report_key(input_dev, atlas_keymap[code], key_down); + input_sync(input_dev); + + status = AE_OK; + } else { + pr_warn("shrugged on unexpected function: function=%x,address=%lx,value=%x\n", + function, (unsigned long)address, (u32)*value); + status = AE_BAD_PARAMETER; + } + + return status; +} + +static int atlas_acpi_button_add(struct acpi_device *device) +{ + acpi_status status; + int i; + int err; + + input_dev = input_allocate_device(); + if (!input_dev) { + pr_err("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->keycode = atlas_keymap; + input_dev->keycodesize = sizeof(unsigned short); + input_dev->keycodemax = ARRAY_SIZE(atlas_keymap); + + input_set_capability(input_dev, EV_MSC, MSC_SCAN); + __set_bit(EV_KEY, input_dev->evbit); + for (i = 0; i < ARRAY_SIZE(atlas_keymap); i++) { + if (i < 9) { + atlas_keymap[i] = KEY_F1 + i; + __set_bit(KEY_F1 + i, input_dev->keybit); + } else + atlas_keymap[i] = KEY_RESERVED; + } + + err = input_register_device(input_dev); + if (err) { + pr_err("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)) { + pr_err("error installing addr spc handler\n"); + input_unregister_device(input_dev); + err = -EINVAL; + } + + return err; +} + +static int atlas_acpi_button_remove(struct acpi_device *device) +{ + acpi_status status; + + status = acpi_remove_address_space_handler(device->handle, + 0x81, &acpi_atlas_button_handler); + if (ACPI_FAILURE(status)) + pr_err("error removing addr spc handler\n"); + + input_unregister_device(input_dev); + + return 0; +} + +static const struct acpi_device_id atlas_device_ids[] = { + {"ASIM0000", 0}, + {"", 0}, +}; +MODULE_DEVICE_TABLE(acpi, atlas_device_ids); + +static struct acpi_driver atlas_acpi_driver = { + .name = ACPI_ATLAS_NAME, + .class = ACPI_ATLAS_CLASS, + .owner = THIS_MODULE, + .ids = atlas_device_ids, + .ops = { + .add = atlas_acpi_button_add, + .remove = atlas_acpi_button_remove, + }, +}; +module_acpi_driver(atlas_acpi_driver); + +MODULE_AUTHOR("Jaya Kumar"); +MODULE_LICENSE("GPL"); +MODULE_DESCRIPTION("Atlas button driver"); + |