^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) * Touchright serial touchscreen driver
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * Copyright (c) 2006 Rick Koch <n1gp@hotmail.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) * Based on MicroTouch driver (drivers/input/touchscreen/mtouch.c)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) * Copyright (c) 2004 Vojtech Pavlik
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) * and Dan Streetman <ddstreet@ieee.org>
^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 "Touchright serial touchscreen driver"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) MODULE_AUTHOR("Rick Koch <n1gp@hotmail.com>");
^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 TR_FORMAT_TOUCH_BIT 0x01
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) #define TR_FORMAT_STATUS_BYTE 0x40
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) #define TR_FORMAT_STATUS_MASK ~TR_FORMAT_TOUCH_BIT
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) #define TR_LENGTH 5
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) #define TR_MIN_XC 0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) #define TR_MAX_XC 0x1ff
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) #define TR_MIN_YC 0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) #define TR_MAX_YC 0x1ff
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) * Per-touchscreen data.
^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) struct tr {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) struct input_dev *dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) struct serio *serio;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) int idx;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) unsigned char data[TR_LENGTH];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) char phys[32];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) static irqreturn_t tr_interrupt(struct serio *serio,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) unsigned char data, unsigned int flags)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) struct tr *tr = serio_get_drvdata(serio);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) struct input_dev *dev = tr->dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) tr->data[tr->idx] = data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) if ((tr->data[0] & TR_FORMAT_STATUS_MASK) == TR_FORMAT_STATUS_BYTE) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) if (++tr->idx == TR_LENGTH) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) input_report_abs(dev, ABS_X,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) (tr->data[1] << 5) | (tr->data[2] >> 1));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) input_report_abs(dev, ABS_Y,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) (tr->data[3] << 5) | (tr->data[4] >> 1));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) input_report_key(dev, BTN_TOUCH,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) tr->data[0] & TR_FORMAT_TOUCH_BIT);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) input_sync(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) tr->idx = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) return IRQ_HANDLED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) * tr_disconnect() is the opposite of tr_connect()
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) static void tr_disconnect(struct serio *serio)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) struct tr *tr = serio_get_drvdata(serio);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) input_get_device(tr->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) input_unregister_device(tr->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) serio_close(serio);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) serio_set_drvdata(serio, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) input_put_device(tr->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) kfree(tr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) * tr_connect() is the routine that is called when someone adds a
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) * new serio device that supports the Touchright protocol and registers it as
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) * an input device.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) static int tr_connect(struct serio *serio, struct serio_driver *drv)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) struct tr *tr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) struct input_dev *input_dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) tr = kzalloc(sizeof(struct tr), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) input_dev = input_allocate_device();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) if (!tr || !input_dev) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) err = -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) goto fail1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) tr->serio = serio;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) tr->dev = input_dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) snprintf(tr->phys, sizeof(tr->phys), "%s/input0", serio->phys);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) input_dev->name = "Touchright Serial TouchScreen";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) input_dev->phys = tr->phys;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) input_dev->id.bustype = BUS_RS232;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) input_dev->id.vendor = SERIO_TOUCHRIGHT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) input_dev->id.product = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) input_dev->id.version = 0x0100;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) input_dev->dev.parent = &serio->dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) input_dev->keybit[BIT_WORD(BTN_TOUCH)] = BIT_MASK(BTN_TOUCH);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) input_set_abs_params(tr->dev, ABS_X, TR_MIN_XC, TR_MAX_XC, 0, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) input_set_abs_params(tr->dev, ABS_Y, TR_MIN_YC, TR_MAX_YC, 0, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) serio_set_drvdata(serio, tr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) err = serio_open(serio, drv);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) goto fail2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) err = input_register_device(tr->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) goto fail3;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) fail3: serio_close(serio);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) fail2: serio_set_drvdata(serio, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) fail1: input_free_device(input_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) kfree(tr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) * The serio driver structure.
^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 const struct serio_device_id tr_serio_ids[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) .type = SERIO_RS232,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) .proto = SERIO_TOUCHRIGHT,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) .id = SERIO_ANY,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) .extra = SERIO_ANY,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) { 0 }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) MODULE_DEVICE_TABLE(serio, tr_serio_ids);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) static struct serio_driver tr_drv = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) .driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) .name = "touchright",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) .description = DRIVER_DESC,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) .id_table = tr_serio_ids,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) .interrupt = tr_interrupt,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) .connect = tr_connect,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) .disconnect = tr_disconnect,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) module_serio_driver(tr_drv);
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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