^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0-or-later
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * Copyright (c) 2000-2001 Vojtech Pavlik
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) * Gunze AHL-51S touchscreen driver for Linux
^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) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <linux/errno.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <linux/kernel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include <linux/slab.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/serio.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) #define DRIVER_DESC "Gunze AHL-51S touchscreen driver"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) MODULE_DESCRIPTION(DRIVER_DESC);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) MODULE_LICENSE("GPL");
^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) * Definitions & global arrays.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) #define GUNZE_MAX_LENGTH 10
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) * Per-touchscreen data.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) struct gunze {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) struct input_dev *dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) struct serio *serio;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) int idx;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) unsigned char data[GUNZE_MAX_LENGTH];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) char phys[32];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) static void gunze_process_packet(struct gunze *gunze)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) struct input_dev *dev = gunze->dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) if (gunze->idx != GUNZE_MAX_LENGTH || gunze->data[5] != ',' ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) (gunze->data[0] != 'T' && gunze->data[0] != 'R')) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) printk(KERN_WARNING "gunze.c: bad packet: >%.*s<\n", GUNZE_MAX_LENGTH, gunze->data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) return;
^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) input_report_abs(dev, ABS_X, simple_strtoul(gunze->data + 1, NULL, 10));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) input_report_abs(dev, ABS_Y, 1024 - simple_strtoul(gunze->data + 6, NULL, 10));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) input_report_key(dev, BTN_TOUCH, gunze->data[0] == 'T');
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) input_sync(dev);
^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) static irqreturn_t gunze_interrupt(struct serio *serio,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) unsigned char data, unsigned int flags)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) struct gunze *gunze = serio_get_drvdata(serio);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) if (data == '\r') {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) gunze_process_packet(gunze);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) gunze->idx = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) if (gunze->idx < GUNZE_MAX_LENGTH)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) gunze->data[gunze->idx++] = data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) return IRQ_HANDLED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) * gunze_disconnect() is the opposite of gunze_connect()
^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 void gunze_disconnect(struct serio *serio)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) struct gunze *gunze = serio_get_drvdata(serio);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) input_get_device(gunze->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) input_unregister_device(gunze->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) serio_close(serio);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) serio_set_drvdata(serio, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) input_put_device(gunze->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) kfree(gunze);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) * gunze_connect() is the routine that is called when someone adds a
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) * new serio device that supports Gunze protocol and registers it as
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) * an input device.
^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) static int gunze_connect(struct serio *serio, struct serio_driver *drv)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) struct gunze *gunze;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) struct input_dev *input_dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) gunze = kzalloc(sizeof(struct gunze), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) input_dev = input_allocate_device();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) if (!gunze || !input_dev) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) err = -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) goto fail1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) gunze->serio = serio;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) gunze->dev = input_dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) snprintf(gunze->phys, sizeof(serio->phys), "%s/input0", serio->phys);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) input_dev->name = "Gunze AHL-51S TouchScreen";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) input_dev->phys = gunze->phys;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) input_dev->id.bustype = BUS_RS232;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) input_dev->id.vendor = SERIO_GUNZE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) input_dev->id.product = 0x0051;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) input_dev->id.version = 0x0100;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) input_dev->dev.parent = &serio->dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) input_dev->keybit[BIT_WORD(BTN_TOUCH)] = BIT_MASK(BTN_TOUCH);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) input_set_abs_params(input_dev, ABS_X, 24, 1000, 0, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) input_set_abs_params(input_dev, ABS_Y, 24, 1000, 0, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) serio_set_drvdata(serio, gunze);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) err = serio_open(serio, drv);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) goto fail2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) err = input_register_device(gunze->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) goto fail3;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) fail3: serio_close(serio);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) fail2: serio_set_drvdata(serio, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) fail1: input_free_device(input_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) kfree(gunze);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) }
^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) * The serio driver structure.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) static const struct serio_device_id gunze_serio_ids[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) .type = SERIO_RS232,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) .proto = SERIO_GUNZE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) .id = SERIO_ANY,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) .extra = SERIO_ANY,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) { 0 }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) MODULE_DEVICE_TABLE(serio, gunze_serio_ids);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) static struct serio_driver gunze_drv = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) .driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) .name = "gunze",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) .description = DRIVER_DESC,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) .id_table = gunze_serio_ids,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) .interrupt = gunze_interrupt,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) .connect = gunze_connect,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) .disconnect = gunze_disconnect,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) module_serio_driver(gunze_drv);
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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