Tias Guns | a5f523b | 2009-10-25 12:13:58 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Dynapro serial touchscreen driver |
| 3 | * |
| 4 | * Copyright (c) 2009 Tias Guns |
| 5 | * Based on the inexio driver (c) Vojtech Pavlik and Dan Streetman and |
| 6 | * Richard Lemon |
| 7 | * |
| 8 | */ |
| 9 | |
| 10 | /* |
| 11 | * This program is free software; you can redistribute it and/or modify it |
| 12 | * under the terms of the GNU General Public License version 2 as published by |
| 13 | * the Free Software Foundation. |
| 14 | */ |
| 15 | |
| 16 | /* |
| 17 | * 2009/09/19 Tias Guns <tias@ulyssis.org> |
| 18 | * Copied inexio.c and edited for Dynapro protocol (from retired Xorg module) |
| 19 | */ |
| 20 | |
| 21 | #include <linux/errno.h> |
| 22 | #include <linux/kernel.h> |
| 23 | #include <linux/module.h> |
| 24 | #include <linux/slab.h> |
| 25 | #include <linux/input.h> |
| 26 | #include <linux/serio.h> |
| 27 | #include <linux/init.h> |
| 28 | |
| 29 | #define DRIVER_DESC "Dynapro serial touchscreen driver" |
| 30 | |
| 31 | MODULE_AUTHOR("Tias Guns <tias@ulyssis.org>"); |
| 32 | MODULE_DESCRIPTION(DRIVER_DESC); |
| 33 | MODULE_LICENSE("GPL"); |
| 34 | |
| 35 | /* |
| 36 | * Definitions & global arrays. |
| 37 | */ |
| 38 | |
| 39 | #define DYNAPRO_FORMAT_TOUCH_BIT 0x40 |
| 40 | #define DYNAPRO_FORMAT_LENGTH 3 |
| 41 | #define DYNAPRO_RESPONSE_BEGIN_BYTE 0x80 |
| 42 | |
| 43 | #define DYNAPRO_MIN_XC 0 |
| 44 | #define DYNAPRO_MAX_XC 0x3ff |
| 45 | #define DYNAPRO_MIN_YC 0 |
| 46 | #define DYNAPRO_MAX_YC 0x3ff |
| 47 | |
| 48 | #define DYNAPRO_GET_XC(data) (data[1] | ((data[0] & 0x38) << 4)) |
| 49 | #define DYNAPRO_GET_YC(data) (data[2] | ((data[0] & 0x07) << 7)) |
| 50 | #define DYNAPRO_GET_TOUCHED(data) (DYNAPRO_FORMAT_TOUCH_BIT & data[0]) |
| 51 | |
| 52 | /* |
| 53 | * Per-touchscreen data. |
| 54 | */ |
| 55 | |
| 56 | struct dynapro { |
| 57 | struct input_dev *dev; |
| 58 | struct serio *serio; |
| 59 | int idx; |
| 60 | unsigned char data[DYNAPRO_FORMAT_LENGTH]; |
| 61 | char phys[32]; |
| 62 | }; |
| 63 | |
| 64 | static void dynapro_process_data(struct dynapro *pdynapro) |
| 65 | { |
| 66 | struct input_dev *dev = pdynapro->dev; |
| 67 | |
| 68 | if (DYNAPRO_FORMAT_LENGTH == ++pdynapro->idx) { |
| 69 | input_report_abs(dev, ABS_X, DYNAPRO_GET_XC(pdynapro->data)); |
| 70 | input_report_abs(dev, ABS_Y, DYNAPRO_GET_YC(pdynapro->data)); |
| 71 | input_report_key(dev, BTN_TOUCH, |
| 72 | DYNAPRO_GET_TOUCHED(pdynapro->data)); |
| 73 | input_sync(dev); |
| 74 | |
| 75 | pdynapro->idx = 0; |
| 76 | } |
| 77 | } |
| 78 | |
| 79 | static irqreturn_t dynapro_interrupt(struct serio *serio, |
| 80 | unsigned char data, unsigned int flags) |
| 81 | { |
| 82 | struct dynapro *pdynapro = serio_get_drvdata(serio); |
| 83 | |
| 84 | pdynapro->data[pdynapro->idx] = data; |
| 85 | |
| 86 | if (DYNAPRO_RESPONSE_BEGIN_BYTE & pdynapro->data[0]) |
| 87 | dynapro_process_data(pdynapro); |
| 88 | else |
| 89 | dev_dbg(&serio->dev, "unknown/unsynchronized data: %x\n", |
| 90 | pdynapro->data[0]); |
| 91 | |
| 92 | return IRQ_HANDLED; |
| 93 | } |
| 94 | |
| 95 | static void dynapro_disconnect(struct serio *serio) |
| 96 | { |
| 97 | struct dynapro *pdynapro = serio_get_drvdata(serio); |
| 98 | |
| 99 | input_get_device(pdynapro->dev); |
| 100 | input_unregister_device(pdynapro->dev); |
| 101 | serio_close(serio); |
| 102 | serio_set_drvdata(serio, NULL); |
| 103 | input_put_device(pdynapro->dev); |
| 104 | kfree(pdynapro); |
| 105 | } |
| 106 | |
| 107 | /* |
| 108 | * dynapro_connect() is the routine that is called when someone adds a |
| 109 | * new serio device that supports dynapro protocol and registers it as |
| 110 | * an input device. This is usually accomplished using inputattach. |
| 111 | */ |
| 112 | |
| 113 | static int dynapro_connect(struct serio *serio, struct serio_driver *drv) |
| 114 | { |
| 115 | struct dynapro *pdynapro; |
| 116 | struct input_dev *input_dev; |
| 117 | int err; |
| 118 | |
| 119 | pdynapro = kzalloc(sizeof(struct dynapro), GFP_KERNEL); |
| 120 | input_dev = input_allocate_device(); |
| 121 | if (!pdynapro || !input_dev) { |
| 122 | err = -ENOMEM; |
| 123 | goto fail1; |
| 124 | } |
| 125 | |
| 126 | pdynapro->serio = serio; |
| 127 | pdynapro->dev = input_dev; |
| 128 | snprintf(pdynapro->phys, sizeof(pdynapro->phys), |
| 129 | "%s/input0", serio->phys); |
| 130 | |
| 131 | input_dev->name = "Dynapro Serial TouchScreen"; |
| 132 | input_dev->phys = pdynapro->phys; |
| 133 | input_dev->id.bustype = BUS_RS232; |
| 134 | input_dev->id.vendor = SERIO_DYNAPRO; |
| 135 | input_dev->id.product = 0; |
| 136 | input_dev->id.version = 0x0001; |
| 137 | input_dev->dev.parent = &serio->dev; |
| 138 | input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS); |
| 139 | input_dev->keybit[BIT_WORD(BTN_TOUCH)] = BIT_MASK(BTN_TOUCH); |
| 140 | input_set_abs_params(pdynapro->dev, ABS_X, |
| 141 | DYNAPRO_MIN_XC, DYNAPRO_MAX_XC, 0, 0); |
| 142 | input_set_abs_params(pdynapro->dev, ABS_Y, |
| 143 | DYNAPRO_MIN_YC, DYNAPRO_MAX_YC, 0, 0); |
| 144 | |
| 145 | serio_set_drvdata(serio, pdynapro); |
| 146 | |
| 147 | err = serio_open(serio, drv); |
| 148 | if (err) |
| 149 | goto fail2; |
| 150 | |
| 151 | err = input_register_device(pdynapro->dev); |
| 152 | if (err) |
| 153 | goto fail3; |
| 154 | |
| 155 | return 0; |
| 156 | |
| 157 | fail3: serio_close(serio); |
| 158 | fail2: serio_set_drvdata(serio, NULL); |
| 159 | fail1: input_free_device(input_dev); |
| 160 | kfree(pdynapro); |
| 161 | return err; |
| 162 | } |
| 163 | |
| 164 | /* |
| 165 | * The serio driver structure. |
| 166 | */ |
| 167 | |
| 168 | static struct serio_device_id dynapro_serio_ids[] = { |
| 169 | { |
| 170 | .type = SERIO_RS232, |
| 171 | .proto = SERIO_DYNAPRO, |
| 172 | .id = SERIO_ANY, |
| 173 | .extra = SERIO_ANY, |
| 174 | }, |
| 175 | { 0 } |
| 176 | }; |
| 177 | |
| 178 | MODULE_DEVICE_TABLE(serio, dynapro_serio_ids); |
| 179 | |
| 180 | static struct serio_driver dynapro_drv = { |
| 181 | .driver = { |
| 182 | .name = "dynapro", |
| 183 | }, |
| 184 | .description = DRIVER_DESC, |
| 185 | .id_table = dynapro_serio_ids, |
| 186 | .interrupt = dynapro_interrupt, |
| 187 | .connect = dynapro_connect, |
| 188 | .disconnect = dynapro_disconnect, |
| 189 | }; |
| 190 | |
Axel Lin | 65ac9f7 | 2012-04-03 23:50:17 -0700 | [diff] [blame^] | 191 | module_serio_driver(dynapro_drv); |