projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 4003dff4 RK |
1 | /* |
| 2 | * Touchright serial touchscreen driver | |
| 3 | * | |
| 4 | * Copyright (c) 2006 Rick Koch <n1gp@hotmail.com> | |
| 5 | * | |
| 6 | * Based on MicroTouch driver (drivers/input/touchscreen/mtouch.c) | |
| 7 | * Copyright (c) 2004 Vojtech Pavlik | |
| 8 | * and Dan Streetman <ddstreet@ieee.org> | |
| 9 | */ | |
| 10 | ||
| 11 | /* | |
| 12 | * This program is free software; you can redistribute it and/or modify it | |
| 13 | * under the terms of the GNU General Public License version 2 as published | |
| 14 | * by the Free Software Foundation. | |
| 15 | */ | |
| 16 | ||
| 17 | #include <linux/errno.h> | |
| 18 | #include <linux/kernel.h> | |
| 19 | #include <linux/module.h> | |
| 20 | #include <linux/slab.h> | |
| 21 | #include <linux/input.h> | |
| 22 | #include <linux/serio.h> | |
| 23 | #include <linux/init.h> | |
| 24 | ||
| 25 | #define DRIVER_DESC "Touchright serial touchscreen driver" | |
| 26 | ||
| 27 | MODULE_AUTHOR("Rick Koch <n1gp@hotmail.com>"); | |
| 28 | MODULE_DESCRIPTION(DRIVER_DESC); | |
| 29 | MODULE_LICENSE("GPL"); | |
| 30 | ||
| 31 | /* | |
| 32 | * Definitions & global arrays. | |
| 33 | */ | |
| 34 | ||
| 35 | #define TR_FORMAT_TOUCH_BIT 0x01 | |
| 36 | #define TR_FORMAT_STATUS_BYTE 0x40 | |
| 37 | #define TR_FORMAT_STATUS_MASK ~TR_FORMAT_TOUCH_BIT | |
| 38 | ||
| 39 | #define TR_LENGTH 5 | |
| 40 | ||
| 41 | #define TR_MIN_XC 0 | |
| 42 | #define TR_MAX_XC 0x1ff | |
| 43 | #define TR_MIN_YC 0 | |
| 44 | #define TR_MAX_YC 0x1ff | |
| 45 | ||
| 46 | /* | |
| 47 | * Per-touchscreen data. | |
| 48 | */ | |
| 49 | ||
| 50 | struct tr { | |
| 51 | struct input_dev *dev; | |
| 52 | struct serio *serio; | |
| 53 | int idx; | |
| 54 | unsigned char data[TR_LENGTH]; | |
| 55 | char phys[32]; | |
| 56 | }; | |
| 57 | ||
| 58 | static irqreturn_t tr_interrupt(struct serio *serio, | |
| 7d12e780 | 59 | unsigned char data, unsigned int flags) |
| 4003dff4 RK |
60 | { |
| 61 | struct tr *tr = serio_get_drvdata(serio); | |
| 62 | struct input_dev *dev = tr->dev; | |
| 63 | ||
| 64 | tr->data[tr->idx] = data; | |
| 65 | ||
| 66 | if ((tr->data[0] & TR_FORMAT_STATUS_MASK) == TR_FORMAT_STATUS_BYTE) { | |
| 67 | if (++tr->idx == TR_LENGTH) { | |
| 4003dff4 RK |
68 | input_report_abs(dev, ABS_X, |
| 69 | (tr->data[1] << 5) | (tr->data[2] >> 1)); | |
| 70 | input_report_abs(dev, ABS_Y, | |
| 71 | (tr->data[3] << 5) | (tr->data[4] >> 1)); | |
| 72 | input_report_key(dev, BTN_TOUCH, | |
| 73 | tr->data[0] & TR_FORMAT_TOUCH_BIT); | |
| 74 | input_sync(dev); | |
| 75 | tr->idx = 0; | |
| 76 | } | |
| 77 | } | |
| 78 | ||
| 79 | return IRQ_HANDLED; | |
| 80 | } | |
| 81 | ||
| 82 | /* | |
| 83 | * tr_disconnect() is the opposite of tr_connect() | |
| 84 | */ | |
| 85 | ||
| 86 | static void tr_disconnect(struct serio *serio) | |
| 87 | { | |
| 88 | struct tr *tr = serio_get_drvdata(serio); | |
| 89 | ||
| 90 | input_get_device(tr->dev); | |
| 91 | input_unregister_device(tr->dev); | |
| 92 | serio_close(serio); | |
| 93 | serio_set_drvdata(serio, NULL); | |
| 94 | input_put_device(tr->dev); | |
| 95 | kfree(tr); | |
| 96 | } | |
| 97 | ||
| 98 | /* | |
| 99 | * tr_connect() is the routine that is called when someone adds a | |
| 100 | * new serio device that supports the Touchright protocol and registers it as | |
| 101 | * an input device. | |
| 102 | */ | |
| 103 | ||
| 104 | static int tr_connect(struct serio *serio, struct serio_driver *drv) | |
| 105 | { | |
| 106 | struct tr *tr; | |
| 107 | struct input_dev *input_dev; | |
| 108 | int err; | |
| 109 | ||
| 110 | tr = kzalloc(sizeof(struct tr), GFP_KERNEL); | |
| 111 | input_dev = input_allocate_device(); | |
| 112 | if (!tr || !input_dev) { | |
| 113 | err = -ENOMEM; | |
| 114 | goto fail1; | |
| 115 | } | |
| 116 | ||
| 117 | tr->serio = serio; | |
| 118 | tr->dev = input_dev; | |
| 119 | snprintf(tr->phys, sizeof(tr->phys), "%s/input0", serio->phys); | |
| 120 | ||
| 4003dff4 RK |
121 | input_dev->name = "Touchright Serial TouchScreen"; |
| 122 | input_dev->phys = tr->phys; | |
| 123 | input_dev->id.bustype = BUS_RS232; | |
| 124 | input_dev->id.vendor = SERIO_TOUCHRIGHT; | |
| 125 | input_dev->id.product = 0; | |
| 126 | input_dev->id.version = 0x0100; | |
| a5394fb0 | 127 | input_dev->dev.parent = &serio->dev; |
| 7b19ada2 JS |
128 | input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS); |
| 129 | input_dev->keybit[BIT_WORD(BTN_TOUCH)] = BIT_MASK(BTN_TOUCH); | |
| 4003dff4 RK |
130 | input_set_abs_params(tr->dev, ABS_X, TR_MIN_XC, TR_MAX_XC, 0, 0); |
| 131 | input_set_abs_params(tr->dev, ABS_Y, TR_MIN_YC, TR_MAX_YC, 0, 0); | |
| 132 | ||
| 133 | serio_set_drvdata(serio, tr); | |
| 134 | ||
| 135 | err = serio_open(serio, drv); | |
| 136 | if (err) | |
| 137 | goto fail2; | |
| 138 | ||
| 139 | err = input_register_device(tr->dev); | |
| 140 | if (err) | |
| 141 | goto fail3; | |
| 142 | ||
| 143 | return 0; | |
| 144 | ||
| 145 | fail3: serio_close(serio); | |
| 146 | fail2: serio_set_drvdata(serio, NULL); | |
| 147 | fail1: input_free_device(input_dev); | |
| 148 | kfree(tr); | |
| 149 | return err; | |
| 150 | } | |
| 151 | ||
| 152 | /* | |
| 153 | * The serio driver structure. | |
| 154 | */ | |
| 155 | ||
| 156 | static struct serio_device_id tr_serio_ids[] = { | |
| 157 | { | |
| 158 | .type = SERIO_RS232, | |
| 159 | .proto = SERIO_TOUCHRIGHT, | |
| 160 | .id = SERIO_ANY, | |
| 161 | .extra = SERIO_ANY, | |
| 162 | }, | |
| 163 | { 0 } | |
| 164 | }; | |
| 165 | ||
| 166 | MODULE_DEVICE_TABLE(serio, tr_serio_ids); | |
| 167 | ||
| 168 | static struct serio_driver tr_drv = { | |
| 169 | .driver = { | |
| 170 | .name = "touchright", | |
| 171 | }, | |
| 172 | .description = DRIVER_DESC, | |
| 173 | .id_table = tr_serio_ids, | |
| 174 | .interrupt = tr_interrupt, | |
| 175 | .connect = tr_connect, | |
| 176 | .disconnect = tr_disconnect, | |
| 177 | }; | |
| 178 | ||
| 65ac9f7a | 179 | module_serio_driver(tr_drv); |