^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0-only
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) * h3600 atmel micro companion support, key subdevice
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * based on previous kernel 2.4 version
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) * Author : Alessandro Gardich <gremlin@gremlin.it>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) * Author : Linus Walleij <linus.walleij@linaro.org>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <linux/init.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <linux/fs.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <linux/interrupt.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <linux/sched.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <linux/pm.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <linux/sysctl.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include <linux/proc_fs.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #include <linux/delay.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #include <linux/device.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) #include <linux/input.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) #include <linux/platform_device.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) #include <linux/mfd/ipaq-micro.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) struct ipaq_micro_keys {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) struct ipaq_micro *micro;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) struct input_dev *input;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) u16 *codes;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) static const u16 micro_keycodes[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) KEY_RECORD, /* 1: Record button */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) KEY_CALENDAR, /* 2: Calendar */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) KEY_ADDRESSBOOK, /* 3: Contacts (looks like Outlook) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) KEY_MAIL, /* 4: Envelope (Q on older iPAQs) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) KEY_HOMEPAGE, /* 5: Start (looks like swoopy arrow) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) KEY_UP, /* 6: Up */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) KEY_RIGHT, /* 7: Right */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) KEY_LEFT, /* 8: Left */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) KEY_DOWN, /* 9: Down */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) static void micro_key_receive(void *data, int len, unsigned char *msg)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) struct ipaq_micro_keys *keys = data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) int key, down;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) down = 0x80 & msg[0];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) key = 0x7f & msg[0];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) if (key < ARRAY_SIZE(micro_keycodes)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) input_report_key(keys->input, keys->codes[key], down);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) input_sync(keys->input);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) static void micro_key_start(struct ipaq_micro_keys *keys)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) spin_lock(&keys->micro->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) keys->micro->key = micro_key_receive;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) keys->micro->key_data = keys;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) spin_unlock(&keys->micro->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) static void micro_key_stop(struct ipaq_micro_keys *keys)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) spin_lock(&keys->micro->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) keys->micro->key = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) keys->micro->key_data = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) spin_unlock(&keys->micro->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) static int micro_key_open(struct input_dev *input)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) struct ipaq_micro_keys *keys = input_get_drvdata(input);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) micro_key_start(keys);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) static void micro_key_close(struct input_dev *input)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) struct ipaq_micro_keys *keys = input_get_drvdata(input);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) micro_key_stop(keys);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) static int micro_key_probe(struct platform_device *pdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) struct ipaq_micro_keys *keys;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) int error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) keys = devm_kzalloc(&pdev->dev, sizeof(*keys), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) if (!keys)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) keys->micro = dev_get_drvdata(pdev->dev.parent);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) keys->input = devm_input_allocate_device(&pdev->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) if (!keys->input)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) keys->input->keycodesize = sizeof(micro_keycodes[0]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) keys->input->keycodemax = ARRAY_SIZE(micro_keycodes);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) keys->codes = devm_kmemdup(&pdev->dev, micro_keycodes,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) keys->input->keycodesize * keys->input->keycodemax,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) keys->input->keycode = keys->codes;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) __set_bit(EV_KEY, keys->input->evbit);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) for (i = 0; i < ARRAY_SIZE(micro_keycodes); i++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) __set_bit(micro_keycodes[i], keys->input->keybit);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) keys->input->name = "h3600 micro keys";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) keys->input->open = micro_key_open;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) keys->input->close = micro_key_close;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) input_set_drvdata(keys->input, keys);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) error = input_register_device(keys->input);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) if (error)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) return error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) platform_set_drvdata(pdev, keys);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) static int __maybe_unused micro_key_suspend(struct device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) struct ipaq_micro_keys *keys = dev_get_drvdata(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) micro_key_stop(keys);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) static int __maybe_unused micro_key_resume(struct device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) struct ipaq_micro_keys *keys = dev_get_drvdata(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) struct input_dev *input = keys->input;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) mutex_lock(&input->mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) if (input->users)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) micro_key_start(keys);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) mutex_unlock(&input->mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) static SIMPLE_DEV_PM_OPS(micro_key_dev_pm_ops,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) micro_key_suspend, micro_key_resume);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) static struct platform_driver micro_key_device_driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) .driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) .name = "ipaq-micro-keys",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) .pm = µ_key_dev_pm_ops,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) .probe = micro_key_probe,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) module_platform_driver(micro_key_device_driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) MODULE_LICENSE("GPL");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) MODULE_DESCRIPTION("driver for iPAQ Atmel micro keys");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) MODULE_ALIAS("platform:ipaq-micro-keys");
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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