166 lines
3.9 KiB
C
166 lines
3.9 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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*
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* h3600 atmel micro companion support, key subdevice
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* based on previous kernel 2.4 version
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* Author : Alessandro Gardich <gremlin@gremlin.it>
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* Author : Linus Walleij <linus.walleij@linaro.org>
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*/
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/fs.h>
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#include <linux/interrupt.h>
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#include <linux/sched.h>
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#include <linux/pm.h>
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#include <linux/sysctl.h>
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#include <linux/proc_fs.h>
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#include <linux/delay.h>
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#include <linux/device.h>
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#include <linux/input.h>
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#include <linux/platform_device.h>
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#include <linux/mfd/ipaq-micro.h>
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struct ipaq_micro_keys {
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struct ipaq_micro *micro;
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struct input_dev *input;
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u16 *codes;
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};
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static const u16 micro_keycodes[] = {
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KEY_RECORD, /* 1: Record button */
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KEY_CALENDAR, /* 2: Calendar */
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KEY_ADDRESSBOOK, /* 3: Contacts (looks like Outlook) */
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KEY_MAIL, /* 4: Envelope (Q on older iPAQs) */
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KEY_HOMEPAGE, /* 5: Start (looks like swoopy arrow) */
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KEY_UP, /* 6: Up */
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KEY_RIGHT, /* 7: Right */
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KEY_LEFT, /* 8: Left */
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KEY_DOWN, /* 9: Down */
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};
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static void micro_key_receive(void *data, int len, unsigned char *msg)
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{
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struct ipaq_micro_keys *keys = data;
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int key, down;
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down = 0x80 & msg[0];
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key = 0x7f & msg[0];
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if (key < ARRAY_SIZE(micro_keycodes)) {
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input_report_key(keys->input, keys->codes[key], down);
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input_sync(keys->input);
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}
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}
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static void micro_key_start(struct ipaq_micro_keys *keys)
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{
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spin_lock(&keys->micro->lock);
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keys->micro->key = micro_key_receive;
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keys->micro->key_data = keys;
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spin_unlock(&keys->micro->lock);
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}
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static void micro_key_stop(struct ipaq_micro_keys *keys)
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{
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spin_lock(&keys->micro->lock);
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keys->micro->key = NULL;
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keys->micro->key_data = NULL;
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spin_unlock(&keys->micro->lock);
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}
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static int micro_key_open(struct input_dev *input)
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{
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struct ipaq_micro_keys *keys = input_get_drvdata(input);
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micro_key_start(keys);
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return 0;
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}
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static void micro_key_close(struct input_dev *input)
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{
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struct ipaq_micro_keys *keys = input_get_drvdata(input);
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micro_key_stop(keys);
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}
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static int micro_key_probe(struct platform_device *pdev)
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{
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struct ipaq_micro_keys *keys;
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int error;
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int i;
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keys = devm_kzalloc(&pdev->dev, sizeof(*keys), GFP_KERNEL);
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if (!keys)
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return -ENOMEM;
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keys->micro = dev_get_drvdata(pdev->dev.parent);
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keys->input = devm_input_allocate_device(&pdev->dev);
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if (!keys->input)
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return -ENOMEM;
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keys->input->keycodesize = sizeof(micro_keycodes[0]);
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keys->input->keycodemax = ARRAY_SIZE(micro_keycodes);
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keys->codes = devm_kmemdup(&pdev->dev, micro_keycodes,
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keys->input->keycodesize * keys->input->keycodemax,
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GFP_KERNEL);
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keys->input->keycode = keys->codes;
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__set_bit(EV_KEY, keys->input->evbit);
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for (i = 0; i < ARRAY_SIZE(micro_keycodes); i++)
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__set_bit(micro_keycodes[i], keys->input->keybit);
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keys->input->name = "h3600 micro keys";
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keys->input->open = micro_key_open;
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keys->input->close = micro_key_close;
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input_set_drvdata(keys->input, keys);
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error = input_register_device(keys->input);
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if (error)
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return error;
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platform_set_drvdata(pdev, keys);
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return 0;
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}
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static int __maybe_unused micro_key_suspend(struct device *dev)
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{
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struct ipaq_micro_keys *keys = dev_get_drvdata(dev);
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micro_key_stop(keys);
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return 0;
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}
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static int __maybe_unused micro_key_resume(struct device *dev)
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{
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struct ipaq_micro_keys *keys = dev_get_drvdata(dev);
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struct input_dev *input = keys->input;
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mutex_lock(&input->mutex);
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if (input_device_enabled(input))
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micro_key_start(keys);
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mutex_unlock(&input->mutex);
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return 0;
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}
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static SIMPLE_DEV_PM_OPS(micro_key_dev_pm_ops,
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micro_key_suspend, micro_key_resume);
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static struct platform_driver micro_key_device_driver = {
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.driver = {
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.name = "ipaq-micro-keys",
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.pm = µ_key_dev_pm_ops,
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},
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.probe = micro_key_probe,
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};
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module_platform_driver(micro_key_device_driver);
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MODULE_LICENSE("GPL");
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MODULE_DESCRIPTION("driver for iPAQ Atmel micro keys");
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MODULE_ALIAS("platform:ipaq-micro-keys");
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