^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, touchscreen subdevice
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * Author : Alessandro Gardich <gremlin@gremlin.it>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) * Author : Dmitry Artamonow <mad_soft@inbox.ru>
^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)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <asm/byteorder.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <linux/init.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <linux/interrupt.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/delay.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include <linux/device.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #include <linux/input.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #include <linux/platform_device.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) #include <linux/slab.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) #include <linux/mfd/ipaq-micro.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) struct touchscreen_data {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) struct input_dev *input;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) struct ipaq_micro *micro;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) static void micro_ts_receive(void *data, int len, unsigned char *msg)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) struct touchscreen_data *ts = data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) if (len == 4) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) input_report_abs(ts->input, ABS_X,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) be16_to_cpup((__be16 *) &msg[2]));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) input_report_abs(ts->input, ABS_Y,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) be16_to_cpup((__be16 *) &msg[0]));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) input_report_key(ts->input, BTN_TOUCH, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) input_sync(ts->input);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) } else if (len == 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) input_report_abs(ts->input, ABS_X, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) input_report_abs(ts->input, ABS_Y, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) input_report_key(ts->input, BTN_TOUCH, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) input_sync(ts->input);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) static void micro_ts_toggle_receive(struct touchscreen_data *ts, bool enable)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) struct ipaq_micro *micro = ts->micro;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) spin_lock_irq(µ->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) if (enable) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) micro->ts = micro_ts_receive;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) micro->ts_data = ts;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) micro->ts = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) micro->ts_data = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) spin_unlock_irq(&ts->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 int micro_ts_open(struct input_dev *input)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) struct touchscreen_data *ts = input_get_drvdata(input);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) micro_ts_toggle_receive(ts, true);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) static void micro_ts_close(struct input_dev *input)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) struct touchscreen_data *ts = input_get_drvdata(input);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) micro_ts_toggle_receive(ts, false);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) static int micro_ts_probe(struct platform_device *pdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) struct ipaq_micro *micro = dev_get_drvdata(pdev->dev.parent);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) struct touchscreen_data *ts;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) int error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) ts = devm_kzalloc(&pdev->dev, sizeof(*ts), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) if (!ts)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) ts->micro = micro;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) ts->input = devm_input_allocate_device(&pdev->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) if (!ts->input) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) dev_err(&pdev->dev, "failed to allocate input device\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) ts->input->name = "ipaq micro ts";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) ts->input->open = micro_ts_open;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) ts->input->close = micro_ts_close;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) input_set_drvdata(ts->input, ts);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) input_set_capability(ts->input, EV_KEY, BTN_TOUCH);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) input_set_capability(ts->input, EV_ABS, ABS_X);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) input_set_capability(ts->input, EV_ABS, ABS_Y);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) input_set_abs_params(ts->input, ABS_X, 0, 1023, 0, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) input_set_abs_params(ts->input, ABS_Y, 0, 1023, 0, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) error = input_register_device(ts->input);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) if (error) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) dev_err(&pdev->dev, "error registering touch input\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) return error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) platform_set_drvdata(pdev, ts);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) dev_info(&pdev->dev, "iPAQ micro touchscreen\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) static int __maybe_unused micro_ts_suspend(struct device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) struct touchscreen_data *ts = dev_get_drvdata(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) micro_ts_toggle_receive(ts, false);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) static int __maybe_unused micro_ts_resume(struct device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) struct touchscreen_data *ts = dev_get_drvdata(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) struct input_dev *input = ts->input;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) mutex_lock(&input->mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) if (input->users)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) micro_ts_toggle_receive(ts, true);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) mutex_unlock(&input->mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) static const struct dev_pm_ops micro_ts_dev_pm_ops = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) SET_SYSTEM_SLEEP_PM_OPS(micro_ts_suspend, micro_ts_resume)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) static struct platform_driver micro_ts_device_driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) .driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) .name = "ipaq-micro-ts",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) .pm = µ_ts_dev_pm_ops,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) .probe = micro_ts_probe,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) module_platform_driver(micro_ts_device_driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) MODULE_LICENSE("GPL");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) MODULE_DESCRIPTION("driver for iPAQ Atmel micro touchscreen");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) MODULE_ALIAS("platform:ipaq-micro-ts");
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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