Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2 | * Copyright (c) 2000-2001 Vojtech Pavlik |
| 3 | */ |
| 4 | |
| 5 | /* |
| 6 | * Gunze AHL-51S touchscreen driver for Linux |
| 7 | */ |
| 8 | |
| 9 | /* |
| 10 | * This program is free software; you can redistribute it and/or modify |
| 11 | * it under the terms of the GNU General Public License as published by |
| 12 | * the Free Software Foundation; either version 2 of the License, or |
| 13 | * (at your option) any later version. |
| 14 | * |
| 15 | * This program is distributed in the hope that it will be useful, |
| 16 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 17 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 18 | * GNU General Public License for more details. |
| 19 | * |
| 20 | * You should have received a copy of the GNU General Public License |
| 21 | * along with this program; if not, write to the Free Software |
| 22 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 23 | */ |
| 24 | |
| 25 | #include <linux/errno.h> |
| 26 | #include <linux/kernel.h> |
| 27 | #include <linux/module.h> |
| 28 | #include <linux/slab.h> |
| 29 | #include <linux/input.h> |
| 30 | #include <linux/serio.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 31 | |
| 32 | #define DRIVER_DESC "Gunze AHL-51S touchscreen driver" |
| 33 | |
| 34 | MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>"); |
| 35 | MODULE_DESCRIPTION(DRIVER_DESC); |
| 36 | MODULE_LICENSE("GPL"); |
| 37 | |
| 38 | /* |
| 39 | * Definitions & global arrays. |
| 40 | */ |
| 41 | |
| 42 | #define GUNZE_MAX_LENGTH 10 |
| 43 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 44 | /* |
| 45 | * Per-touchscreen data. |
| 46 | */ |
| 47 | |
| 48 | struct gunze { |
Dmitry Torokhov | eca1ed1 | 2005-09-15 02:01:46 -0500 | [diff] [blame] | 49 | struct input_dev *dev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 50 | struct serio *serio; |
| 51 | int idx; |
| 52 | unsigned char data[GUNZE_MAX_LENGTH]; |
| 53 | char phys[32]; |
| 54 | }; |
| 55 | |
Hardik Singh Rathore | 249d1bb2 | 2018-12-21 01:06:42 -0800 | [diff] [blame] | 56 | static void gunze_process_packet(struct gunze *gunze) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 57 | { |
Dmitry Torokhov | eca1ed1 | 2005-09-15 02:01:46 -0500 | [diff] [blame] | 58 | struct input_dev *dev = gunze->dev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 59 | |
| 60 | if (gunze->idx != GUNZE_MAX_LENGTH || gunze->data[5] != ',' || |
| 61 | (gunze->data[0] != 'T' && gunze->data[0] != 'R')) { |
Dmitry Torokhov | a07461e | 2005-05-28 02:12:00 -0500 | [diff] [blame] | 62 | printk(KERN_WARNING "gunze.c: bad packet: >%.*s<\n", GUNZE_MAX_LENGTH, gunze->data); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 63 | return; |
| 64 | } |
| 65 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 66 | input_report_abs(dev, ABS_X, simple_strtoul(gunze->data + 1, NULL, 10)); |
| 67 | input_report_abs(dev, ABS_Y, 1024 - simple_strtoul(gunze->data + 6, NULL, 10)); |
| 68 | input_report_key(dev, BTN_TOUCH, gunze->data[0] == 'T'); |
| 69 | input_sync(dev); |
| 70 | } |
| 71 | |
| 72 | static irqreturn_t gunze_interrupt(struct serio *serio, |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 73 | unsigned char data, unsigned int flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 74 | { |
Hardik Singh Rathore | 249d1bb2 | 2018-12-21 01:06:42 -0800 | [diff] [blame] | 75 | struct gunze *gunze = serio_get_drvdata(serio); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 76 | |
| 77 | if (data == '\r') { |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 78 | gunze_process_packet(gunze); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 79 | gunze->idx = 0; |
| 80 | } else { |
| 81 | if (gunze->idx < GUNZE_MAX_LENGTH) |
| 82 | gunze->data[gunze->idx++] = data; |
| 83 | } |
| 84 | return IRQ_HANDLED; |
| 85 | } |
| 86 | |
| 87 | /* |
| 88 | * gunze_disconnect() is the opposite of gunze_connect() |
| 89 | */ |
| 90 | |
| 91 | static void gunze_disconnect(struct serio *serio) |
| 92 | { |
Dmitry Torokhov | eca1ed1 | 2005-09-15 02:01:46 -0500 | [diff] [blame] | 93 | struct gunze *gunze = serio_get_drvdata(serio); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 94 | |
Dmitry Torokhov | eca1ed1 | 2005-09-15 02:01:46 -0500 | [diff] [blame] | 95 | input_get_device(gunze->dev); |
| 96 | input_unregister_device(gunze->dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 97 | serio_close(serio); |
| 98 | serio_set_drvdata(serio, NULL); |
Dmitry Torokhov | eca1ed1 | 2005-09-15 02:01:46 -0500 | [diff] [blame] | 99 | input_put_device(gunze->dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 100 | kfree(gunze); |
| 101 | } |
| 102 | |
| 103 | /* |
| 104 | * gunze_connect() is the routine that is called when someone adds a |
| 105 | * new serio device that supports Gunze protocol and registers it as |
| 106 | * an input device. |
| 107 | */ |
| 108 | |
| 109 | static int gunze_connect(struct serio *serio, struct serio_driver *drv) |
| 110 | { |
| 111 | struct gunze *gunze; |
Dmitry Torokhov | eca1ed1 | 2005-09-15 02:01:46 -0500 | [diff] [blame] | 112 | struct input_dev *input_dev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 113 | int err; |
| 114 | |
Dmitry Torokhov | eca1ed1 | 2005-09-15 02:01:46 -0500 | [diff] [blame] | 115 | gunze = kzalloc(sizeof(struct gunze), GFP_KERNEL); |
| 116 | input_dev = input_allocate_device(); |
| 117 | if (!gunze || !input_dev) { |
| 118 | err = -ENOMEM; |
Dmitry Torokhov | 52c1f57 | 2006-11-05 22:40:03 -0500 | [diff] [blame] | 119 | goto fail1; |
Dmitry Torokhov | eca1ed1 | 2005-09-15 02:01:46 -0500 | [diff] [blame] | 120 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 121 | |
| 122 | gunze->serio = serio; |
Dmitry Torokhov | eca1ed1 | 2005-09-15 02:01:46 -0500 | [diff] [blame] | 123 | gunze->dev = input_dev; |
Dmitry Torokhov | a21466c | 2006-06-26 01:46:04 -0400 | [diff] [blame] | 124 | snprintf(gunze->phys, sizeof(serio->phys), "%s/input0", serio->phys); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 125 | |
Dmitry Torokhov | eca1ed1 | 2005-09-15 02:01:46 -0500 | [diff] [blame] | 126 | input_dev->name = "Gunze AHL-51S TouchScreen"; |
| 127 | input_dev->phys = gunze->phys; |
| 128 | input_dev->id.bustype = BUS_RS232; |
| 129 | input_dev->id.vendor = SERIO_GUNZE; |
| 130 | input_dev->id.product = 0x0051; |
| 131 | input_dev->id.version = 0x0100; |
Dmitry Torokhov | a5394fb0 | 2007-04-12 01:35:14 -0400 | [diff] [blame] | 132 | input_dev->dev.parent = &serio->dev; |
Jiri Slaby | 7b19ada | 2007-10-18 23:40:32 -0700 | [diff] [blame] | 133 | input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS); |
| 134 | input_dev->keybit[BIT_WORD(BTN_TOUCH)] = BIT_MASK(BTN_TOUCH); |
Dmitry Torokhov | eca1ed1 | 2005-09-15 02:01:46 -0500 | [diff] [blame] | 135 | input_set_abs_params(input_dev, ABS_X, 24, 1000, 0, 0); |
| 136 | input_set_abs_params(input_dev, ABS_Y, 24, 1000, 0, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 137 | |
| 138 | serio_set_drvdata(serio, gunze); |
| 139 | |
| 140 | err = serio_open(serio, drv); |
Dmitry Torokhov | eca1ed1 | 2005-09-15 02:01:46 -0500 | [diff] [blame] | 141 | if (err) |
Dmitry Torokhov | 52c1f57 | 2006-11-05 22:40:03 -0500 | [diff] [blame] | 142 | goto fail2; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 143 | |
Dmitry Torokhov | 52c1f57 | 2006-11-05 22:40:03 -0500 | [diff] [blame] | 144 | err = input_register_device(gunze->dev); |
| 145 | if (err) |
| 146 | goto fail3; |
| 147 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 148 | return 0; |
Dmitry Torokhov | eca1ed1 | 2005-09-15 02:01:46 -0500 | [diff] [blame] | 149 | |
Dmitry Torokhov | 52c1f57 | 2006-11-05 22:40:03 -0500 | [diff] [blame] | 150 | fail3: serio_close(serio); |
| 151 | fail2: serio_set_drvdata(serio, NULL); |
| 152 | fail1: input_free_device(input_dev); |
Dmitry Torokhov | eca1ed1 | 2005-09-15 02:01:46 -0500 | [diff] [blame] | 153 | kfree(gunze); |
| 154 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 155 | } |
| 156 | |
| 157 | /* |
| 158 | * The serio driver structure. |
| 159 | */ |
| 160 | |
Arvind Yadav | 7330090 | 2017-08-18 17:11:12 -0700 | [diff] [blame] | 161 | static const struct serio_device_id gunze_serio_ids[] = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 162 | { |
| 163 | .type = SERIO_RS232, |
| 164 | .proto = SERIO_GUNZE, |
| 165 | .id = SERIO_ANY, |
| 166 | .extra = SERIO_ANY, |
| 167 | }, |
| 168 | { 0 } |
| 169 | }; |
| 170 | |
| 171 | MODULE_DEVICE_TABLE(serio, gunze_serio_ids); |
| 172 | |
| 173 | static struct serio_driver gunze_drv = { |
| 174 | .driver = { |
| 175 | .name = "gunze", |
| 176 | }, |
| 177 | .description = DRIVER_DESC, |
| 178 | .id_table = gunze_serio_ids, |
| 179 | .interrupt = gunze_interrupt, |
| 180 | .connect = gunze_connect, |
| 181 | .disconnect = gunze_disconnect, |
| 182 | }; |
| 183 | |
Axel Lin | 65ac9f7a | 2012-04-03 23:50:17 -0700 | [diff] [blame] | 184 | module_serio_driver(gunze_drv); |