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144 lines
3.5 KiB
144 lines
3.5 KiB
// SPDX-License-Identifier: GPL-2.0-or-later |
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/* |
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* atlas_btns.c - Atlas Wallmount Touchscreen ACPI Extras |
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* |
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* Copyright (C) 2006 Jaya Kumar |
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* Based on Toshiba ACPI by John Belmonte and ASUS ACPI |
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* This work was sponsored by CIS(M) Sdn Bhd. |
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*/ |
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#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
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#include <linux/kernel.h> |
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#include <linux/module.h> |
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#include <linux/input.h> |
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#include <linux/types.h> |
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#include <linux/acpi.h> |
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#include <linux/uaccess.h> |
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#define ACPI_ATLAS_NAME "Atlas ACPI" |
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#define ACPI_ATLAS_CLASS "Atlas" |
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static unsigned short atlas_keymap[16]; |
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static struct input_dev *input_dev; |
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/* button handling code */ |
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static acpi_status acpi_atlas_button_setup(acpi_handle region_handle, |
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u32 function, void *handler_context, void **return_context) |
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{ |
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*return_context = |
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(function != ACPI_REGION_DEACTIVATE) ? handler_context : NULL; |
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return AE_OK; |
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} |
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static acpi_status acpi_atlas_button_handler(u32 function, |
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acpi_physical_address address, |
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u32 bit_width, u64 *value, |
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void *handler_context, void *region_context) |
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{ |
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acpi_status status; |
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if (function == ACPI_WRITE) { |
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int code = address & 0x0f; |
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int key_down = !(address & 0x10); |
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input_event(input_dev, EV_MSC, MSC_SCAN, code); |
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input_report_key(input_dev, atlas_keymap[code], key_down); |
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input_sync(input_dev); |
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status = AE_OK; |
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} else { |
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pr_warn("shrugged on unexpected function: function=%x,address=%lx,value=%x\n", |
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function, (unsigned long)address, (u32)*value); |
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status = AE_BAD_PARAMETER; |
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} |
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return status; |
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} |
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static int atlas_acpi_button_add(struct acpi_device *device) |
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{ |
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acpi_status status; |
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int i; |
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int err; |
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input_dev = input_allocate_device(); |
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if (!input_dev) { |
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pr_err("unable to allocate input device\n"); |
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return -ENOMEM; |
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} |
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input_dev->name = "Atlas ACPI button driver"; |
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input_dev->phys = "ASIM0000/atlas/input0"; |
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input_dev->id.bustype = BUS_HOST; |
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input_dev->keycode = atlas_keymap; |
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input_dev->keycodesize = sizeof(unsigned short); |
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input_dev->keycodemax = ARRAY_SIZE(atlas_keymap); |
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input_set_capability(input_dev, EV_MSC, MSC_SCAN); |
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__set_bit(EV_KEY, input_dev->evbit); |
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for (i = 0; i < ARRAY_SIZE(atlas_keymap); i++) { |
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if (i < 9) { |
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atlas_keymap[i] = KEY_F1 + i; |
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__set_bit(KEY_F1 + i, input_dev->keybit); |
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} else |
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atlas_keymap[i] = KEY_RESERVED; |
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} |
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err = input_register_device(input_dev); |
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if (err) { |
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pr_err("couldn't register input device\n"); |
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input_free_device(input_dev); |
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return err; |
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} |
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/* hookup button handler */ |
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status = acpi_install_address_space_handler(device->handle, |
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0x81, &acpi_atlas_button_handler, |
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&acpi_atlas_button_setup, device); |
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if (ACPI_FAILURE(status)) { |
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pr_err("error installing addr spc handler\n"); |
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input_unregister_device(input_dev); |
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err = -EINVAL; |
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} |
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return err; |
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} |
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static int atlas_acpi_button_remove(struct acpi_device *device) |
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{ |
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acpi_status status; |
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status = acpi_remove_address_space_handler(device->handle, |
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0x81, &acpi_atlas_button_handler); |
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if (ACPI_FAILURE(status)) |
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pr_err("error removing addr spc handler\n"); |
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input_unregister_device(input_dev); |
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return 0; |
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} |
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static const struct acpi_device_id atlas_device_ids[] = { |
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{"ASIM0000", 0}, |
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{"", 0}, |
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}; |
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MODULE_DEVICE_TABLE(acpi, atlas_device_ids); |
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static struct acpi_driver atlas_acpi_driver = { |
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.name = ACPI_ATLAS_NAME, |
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.class = ACPI_ATLAS_CLASS, |
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.owner = THIS_MODULE, |
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.ids = atlas_device_ids, |
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.ops = { |
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.add = atlas_acpi_button_add, |
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.remove = atlas_acpi_button_remove, |
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}, |
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}; |
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module_acpi_driver(atlas_acpi_driver); |
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MODULE_AUTHOR("Jaya Kumar"); |
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MODULE_LICENSE("GPL"); |
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MODULE_DESCRIPTION("Atlas button driver"); |
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