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Release 4.11 drivers/input/keyboard/ipaq-micro-keys.c

/*
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 *
 * h3600 atmel micro companion support, key subdevice
 * based on previous kernel 2.4 version
 * Author : Alessandro Gardich <gremlin@gremlin.it>
 * Author : Linus Walleij <linus.walleij@linaro.org>
 *
 */
#include <linux/module.h>
#include <linux/init.h>
#include <linux/fs.h>
#include <linux/interrupt.h>
#include <linux/sched.h>
#include <linux/pm.h>
#include <linux/sysctl.h>
#include <linux/proc_fs.h>
#include <linux/delay.h>
#include <linux/device.h>
#include <linux/input.h>
#include <linux/platform_device.h>
#include <linux/mfd/ipaq-micro.h>


struct ipaq_micro_keys {
	
struct ipaq_micro *micro;
	
struct input_dev *input;
	
u16 *codes;
};


static const u16 micro_keycodes[] = {
	KEY_RECORD,		/* 1:  Record button                    */
	KEY_CALENDAR,		/* 2:  Calendar                         */
	KEY_ADDRESSBOOK,	/* 3:  Contacts (looks like Outlook)    */
	KEY_MAIL,		/* 4:  Envelope (Q on older iPAQs)      */
	KEY_HOMEPAGE,		/* 5:  Start (looks like swoopy arrow)  */
	KEY_UP,			/* 6:  Up                               */
	KEY_RIGHT,		/* 7:  Right                            */
	KEY_LEFT,		/* 8:  Left                             */
	KEY_DOWN,		/* 9:  Down                             */
};


static void micro_key_receive(void *data, int len, unsigned char *msg) { struct ipaq_micro_keys *keys = data; int key, down; down = 0x80 & msg[0]; key = 0x7f & msg[0]; if (key < ARRAY_SIZE(micro_keycodes)) { input_report_key(keys->input, keys->codes[key], down); input_sync(keys->input); } }

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static void micro_key_start(struct ipaq_micro_keys *keys) { spin_lock(&keys->micro->lock); keys->micro->key = micro_key_receive; keys->micro->key_data = keys; spin_unlock(&keys->micro->lock); }

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static void micro_key_stop(struct ipaq_micro_keys *keys) { spin_lock(&keys->micro->lock); keys->micro->key = NULL; keys->micro->key_data = NULL; spin_unlock(&keys->micro->lock); }

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static int micro_key_open(struct input_dev *input) { struct ipaq_micro_keys *keys = input_get_drvdata(input); micro_key_start(keys); return 0; }

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static void micro_key_close(struct input_dev *input) { struct ipaq_micro_keys *keys = input_get_drvdata(input); micro_key_stop(keys); }

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static int micro_key_probe(struct platform_device *pdev) { struct ipaq_micro_keys *keys; int error; int i; keys = devm_kzalloc(&pdev->dev, sizeof(*keys), GFP_KERNEL); if (!keys) return -ENOMEM; keys->micro = dev_get_drvdata(pdev->dev.parent); keys->input = devm_input_allocate_device(&pdev->dev); if (!keys->input) return -ENOMEM; keys->input->keycodesize = sizeof(micro_keycodes[0]); keys->input->keycodemax = ARRAY_SIZE(micro_keycodes); keys->codes = devm_kmemdup(&pdev->dev, micro_keycodes, keys->input->keycodesize * keys->input->keycodemax, GFP_KERNEL); keys->input->keycode = keys->codes; __set_bit(EV_KEY, keys->input->evbit); for (i = 0; i < ARRAY_SIZE(micro_keycodes); i++) __set_bit(micro_keycodes[i], keys->input->keybit); keys->input->name = "h3600 micro keys"; keys->input->open = micro_key_open; keys->input->close = micro_key_close; input_set_drvdata(keys->input, keys); error = input_register_device(keys->input); if (error) return error; platform_set_drvdata(pdev, keys); return 0; }

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static int __maybe_unused micro_key_suspend(struct device *dev) { struct ipaq_micro_keys *keys = dev_get_drvdata(dev); micro_key_stop(keys); return 0; }

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static int __maybe_unused micro_key_resume(struct device *dev) { struct ipaq_micro_keys *keys = dev_get_drvdata(dev); struct input_dev *input = keys->input; mutex_lock(&input->mutex); if (input->users) micro_key_start(keys); mutex_unlock(&input->mutex); return 0; }

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static SIMPLE_DEV_PM_OPS(micro_key_dev_pm_ops, micro_key_suspend, micro_key_resume); static struct platform_driver micro_key_device_driver = { .driver = { .name = "ipaq-micro-keys", .pm = &micro_key_dev_pm_ops, }, .probe = micro_key_probe, }; module_platform_driver(micro_key_device_driver); MODULE_LICENSE("GPL"); MODULE_DESCRIPTION("driver for iPAQ Atmel micro keys"); MODULE_ALIAS("platform:ipaq-micro-keys");

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