1// SPDX-License-Identifier: GPL-2.0-only
  2/*
 
 
 
  3 *
  4 * h3600 atmel micro companion support, key subdevice
  5 * based on previous kernel 2.4 version
  6 * Author : Alessandro Gardich <gremlin@gremlin.it>
  7 * Author : Linus Walleij <linus.walleij@linaro.org>
 
  8 */
  9#include <linux/module.h>
 10#include <linux/init.h>
 11#include <linux/fs.h>
 12#include <linux/interrupt.h>
 13#include <linux/sched.h>
 14#include <linux/pm.h>
 15#include <linux/sysctl.h>
 16#include <linux/proc_fs.h>
 17#include <linux/delay.h>
 18#include <linux/device.h>
 19#include <linux/input.h>
 20#include <linux/platform_device.h>
 21#include <linux/mfd/ipaq-micro.h>
 22
 23struct ipaq_micro_keys {
 24	struct ipaq_micro *micro;
 25	struct input_dev *input;
 26	u16 *codes;
 27};
 28
 29static const u16 micro_keycodes[] = {
 30	KEY_RECORD,		/* 1:  Record button			*/
 31	KEY_CALENDAR,		/* 2:  Calendar				*/
 32	KEY_ADDRESSBOOK,	/* 3:  Contacts (looks like Outlook)	*/
 33	KEY_MAIL,		/* 4:  Envelope (Q on older iPAQs)	*/
 34	KEY_HOMEPAGE,		/* 5:  Start (looks like swoopy arrow)	*/
 35	KEY_UP,			/* 6:  Up				*/
 36	KEY_RIGHT,		/* 7:  Right				*/
 37	KEY_LEFT,		/* 8:  Left				*/
 38	KEY_DOWN,		/* 9:  Down				*/
 39};
 40
 41static void micro_key_receive(void *data, int len, unsigned char *msg)
 42{
 43	struct ipaq_micro_keys *keys = data;
 44	int key, down;
 45
 46	down = 0x80 & msg[0];
 47	key  = 0x7f & msg[0];
 48
 49	if (key < ARRAY_SIZE(micro_keycodes)) {
 50		input_report_key(keys->input, keys->codes[key], down);
 51		input_sync(keys->input);
 52	}
 53}
 54
 55static void micro_key_start(struct ipaq_micro_keys *keys)
 56{
 57	spin_lock(&keys->micro->lock);
 58	keys->micro->key = micro_key_receive;
 59	keys->micro->key_data = keys;
 60	spin_unlock(&keys->micro->lock);
 61}
 62
 63static void micro_key_stop(struct ipaq_micro_keys *keys)
 64{
 65	spin_lock(&keys->micro->lock);
 66	keys->micro->key = NULL;
 67	keys->micro->key_data = NULL;
 68	spin_unlock(&keys->micro->lock);
 69}
 70
 71static int micro_key_open(struct input_dev *input)
 72{
 73	struct ipaq_micro_keys *keys = input_get_drvdata(input);
 74
 75	micro_key_start(keys);
 76
 77	return 0;
 78}
 79
 80static void micro_key_close(struct input_dev *input)
 81{
 82	struct ipaq_micro_keys *keys = input_get_drvdata(input);
 83
 84	micro_key_stop(keys);
 85}
 86
 87static int micro_key_probe(struct platform_device *pdev)
 88{
 89	struct ipaq_micro_keys *keys;
 90	int error;
 91	int i;
 92
 93	keys = devm_kzalloc(&pdev->dev, sizeof(*keys), GFP_KERNEL);
 94	if (!keys)
 95		return -ENOMEM;
 96
 97	keys->micro = dev_get_drvdata(pdev->dev.parent);
 98
 99	keys->input = devm_input_allocate_device(&pdev->dev);
100	if (!keys->input)
101		return -ENOMEM;
102
103	keys->input->keycodesize = sizeof(micro_keycodes[0]);
104	keys->input->keycodemax = ARRAY_SIZE(micro_keycodes);
105	keys->codes = devm_kmemdup(&pdev->dev, micro_keycodes,
106			   keys->input->keycodesize * keys->input->keycodemax,
107			   GFP_KERNEL);
108	if (!keys->codes)
109		return -ENOMEM;
110
111	keys->input->keycode = keys->codes;
112
113	__set_bit(EV_KEY, keys->input->evbit);
114	for (i = 0; i < ARRAY_SIZE(micro_keycodes); i++)
115		__set_bit(micro_keycodes[i], keys->input->keybit);
116
117	keys->input->name = "h3600 micro keys";
118	keys->input->open = micro_key_open;
119	keys->input->close = micro_key_close;
120	input_set_drvdata(keys->input, keys);
121
122	error = input_register_device(keys->input);
123	if (error)
124		return error;
125
126	platform_set_drvdata(pdev, keys);
127	return 0;
128}
129
130static int micro_key_suspend(struct device *dev)
131{
132	struct ipaq_micro_keys *keys = dev_get_drvdata(dev);
133
134	micro_key_stop(keys);
135
136	return 0;
137}
138
139static int micro_key_resume(struct device *dev)
140{
141	struct ipaq_micro_keys *keys = dev_get_drvdata(dev);
142	struct input_dev *input = keys->input;
143
144	mutex_lock(&input->mutex);
145
146	if (input_device_enabled(input))
147		micro_key_start(keys);
148
149	mutex_unlock(&input->mutex);
150
151	return 0;
152}
153
154static DEFINE_SIMPLE_DEV_PM_OPS(micro_key_dev_pm_ops,
155				micro_key_suspend, micro_key_resume);
156
157static struct platform_driver micro_key_device_driver = {
158	.driver = {
159		.name    = "ipaq-micro-keys",
160		.pm	= pm_sleep_ptr(&micro_key_dev_pm_ops),
161	},
162	.probe   = micro_key_probe,
163};
164module_platform_driver(micro_key_device_driver);
165
166MODULE_LICENSE("GPL");
167MODULE_DESCRIPTION("driver for iPAQ Atmel micro keys");
168MODULE_ALIAS("platform:ipaq-micro-keys");

 
  1/*
  2 * This program is free software; you can redistribute it and/or modify
  3 * it under the terms of the GNU General Public License version 2 as
  4 * published by the Free Software Foundation.
  5 *
  6 * h3600 atmel micro companion support, key subdevice
  7 * based on previous kernel 2.4 version
  8 * Author : Alessandro Gardich <gremlin@gremlin.it>
  9 * Author : Linus Walleij <linus.walleij@linaro.org>
 10 *
 11 */
 12#include <linux/module.h>
 13#include <linux/init.h>
 14#include <linux/fs.h>
 15#include <linux/interrupt.h>
 16#include <linux/sched.h>
 17#include <linux/pm.h>
 18#include <linux/sysctl.h>
 19#include <linux/proc_fs.h>
 20#include <linux/delay.h>
 21#include <linux/device.h>
 22#include <linux/input.h>
 23#include <linux/platform_device.h>
 24#include <linux/mfd/ipaq-micro.h>
 25
 26struct ipaq_micro_keys {
 27	struct ipaq_micro *micro;
 28	struct input_dev *input;
 29	u16 *codes;
 30};
 31
 32static const u16 micro_keycodes[] = {
 33	KEY_RECORD,		/* 1:  Record button			*/
 34	KEY_CALENDAR,		/* 2:  Calendar				*/
 35	KEY_ADDRESSBOOK,	/* 3:  Contacts (looks like Outlook)	*/
 36	KEY_MAIL,		/* 4:  Envelope (Q on older iPAQs)	*/
 37	KEY_HOMEPAGE,		/* 5:  Start (looks like swoopy arrow)	*/
 38	KEY_UP,			/* 6:  Up				*/
 39	KEY_RIGHT,		/* 7:  Right				*/
 40	KEY_LEFT,		/* 8:  Left				*/
 41	KEY_DOWN,		/* 9:  Down				*/
 42};
 43
 44static void micro_key_receive(void *data, int len, unsigned char *msg)
 45{
 46	struct ipaq_micro_keys *keys = data;
 47	int key, down;
 48
 49	down = 0x80 & msg[0];
 50	key  = 0x7f & msg[0];
 51
 52	if (key < ARRAY_SIZE(micro_keycodes)) {
 53		input_report_key(keys->input, keys->codes[key], down);
 54		input_sync(keys->input);
 55	}
 56}
 57
 58static void micro_key_start(struct ipaq_micro_keys *keys)
 59{
 60	spin_lock(&keys->micro->lock);
 61	keys->micro->key = micro_key_receive;
 62	keys->micro->key_data = keys;
 63	spin_unlock(&keys->micro->lock);
 64}
 65
 66static void micro_key_stop(struct ipaq_micro_keys *keys)
 67{
 68	spin_lock(&keys->micro->lock);
 69	keys->micro->key = NULL;
 70	keys->micro->key_data = NULL;
 71	spin_unlock(&keys->micro->lock);
 72}
 73
 74static int micro_key_open(struct input_dev *input)
 75{
 76	struct ipaq_micro_keys *keys = input_get_drvdata(input);
 77
 78	micro_key_start(keys);
 79
 80	return 0;
 81}
 82
 83static void micro_key_close(struct input_dev *input)
 84{
 85	struct ipaq_micro_keys *keys = input_get_drvdata(input);
 86
 87	micro_key_stop(keys);
 88}
 89
 90static int micro_key_probe(struct platform_device *pdev)
 91{
 92	struct ipaq_micro_keys *keys;
 93	int error;
 94	int i;
 95
 96	keys = devm_kzalloc(&pdev->dev, sizeof(*keys), GFP_KERNEL);
 97	if (!keys)
 98		return -ENOMEM;
 99
100	keys->micro = dev_get_drvdata(pdev->dev.parent);
101
102	keys->input = devm_input_allocate_device(&pdev->dev);
103	if (!keys->input)
104		return -ENOMEM;
105
106	keys->input->keycodesize = sizeof(micro_keycodes[0]);
107	keys->input->keycodemax = ARRAY_SIZE(micro_keycodes);
108	keys->codes = devm_kmemdup(&pdev->dev, micro_keycodes,
109			   keys->input->keycodesize * keys->input->keycodemax,
110			   GFP_KERNEL);
 
 
 
111	keys->input->keycode = keys->codes;
112
113	__set_bit(EV_KEY, keys->input->evbit);
114	for (i = 0; i < ARRAY_SIZE(micro_keycodes); i++)
115		__set_bit(micro_keycodes[i], keys->input->keybit);
116
117	keys->input->name = "h3600 micro keys";
118	keys->input->open = micro_key_open;
119	keys->input->close = micro_key_close;
120	input_set_drvdata(keys->input, keys);
121
122	error = input_register_device(keys->input);
123	if (error)
124		return error;
125
126	platform_set_drvdata(pdev, keys);
127	return 0;
128}
129
130static int __maybe_unused micro_key_suspend(struct device *dev)
131{
132	struct ipaq_micro_keys *keys = dev_get_drvdata(dev);
133
134	micro_key_stop(keys);
135
136	return 0;
137}
138
139static int __maybe_unused micro_key_resume(struct device *dev)
140{
141	struct ipaq_micro_keys *keys = dev_get_drvdata(dev);
142	struct input_dev *input = keys->input;
143
144	mutex_lock(&input->mutex);
145
146	if (input->users)
147		micro_key_start(keys);
148
149	mutex_unlock(&input->mutex);
150
151	return 0;
152}
153
154static SIMPLE_DEV_PM_OPS(micro_key_dev_pm_ops,
155			 micro_key_suspend, micro_key_resume);
156
157static struct platform_driver micro_key_device_driver = {
158	.driver = {
159		.name    = "ipaq-micro-keys",
160		.pm	= &micro_key_dev_pm_ops,
161	},
162	.probe   = micro_key_probe,
163};
164module_platform_driver(micro_key_device_driver);
165
166MODULE_LICENSE("GPL");
167MODULE_DESCRIPTION("driver for iPAQ Atmel micro keys");
168MODULE_ALIAS("platform:ipaq-micro-keys");