Loading...
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 | /*
* HTC Shift touchscreen driver
*
* Copyright (C) 2008 Pau Oliva Fora <pof@eslack.org>
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 as published
* by the Free Software Foundation.
*/
#include <linux/errno.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/input.h>
#include <linux/interrupt.h>
#include <linux/io.h>
#include <linux/init.h>
#include <linux/irq.h>
#include <linux/isa.h>
#include <linux/ioport.h>
#include <linux/dmi.h>
MODULE_AUTHOR("Pau Oliva Fora <pau@eslack.org>");
MODULE_DESCRIPTION("HTC Shift touchscreen driver");
MODULE_LICENSE("GPL");
#define HTCPEN_PORT_IRQ_CLEAR 0x068
#define HTCPEN_PORT_INIT 0x06c
#define HTCPEN_PORT_INDEX 0x0250
#define HTCPEN_PORT_DATA 0x0251
#define HTCPEN_IRQ 3
#define DEVICE_ENABLE 0xa2
#define DEVICE_DISABLE 0xa3
#define X_INDEX 3
#define Y_INDEX 5
#define TOUCH_INDEX 0xb
#define LSB_XY_INDEX 0xc
#define X_AXIS_MAX 2040
#define Y_AXIS_MAX 2040
static int invert_x;
module_param(invert_x, bool, 0644);
MODULE_PARM_DESC(invert_x, "If set, X axis is inverted");
static int invert_y;
module_param(invert_y, bool, 0644);
MODULE_PARM_DESC(invert_y, "If set, Y axis is inverted");
static struct pnp_device_id pnp_ids[] = {
{ .id = "PNP0cc0" },
{ .id = "" }
};
MODULE_DEVICE_TABLE(pnp, pnp_ids);
static irqreturn_t htcpen_interrupt(int irq, void *handle)
{
struct input_dev *htcpen_dev = handle;
unsigned short x, y, xy;
/* 0 = press; 1 = release */
outb_p(TOUCH_INDEX, HTCPEN_PORT_INDEX);
if (inb_p(HTCPEN_PORT_DATA)) {
input_report_key(htcpen_dev, BTN_TOUCH, 0);
} else {
outb_p(X_INDEX, HTCPEN_PORT_INDEX);
x = inb_p(HTCPEN_PORT_DATA);
outb_p(Y_INDEX, HTCPEN_PORT_INDEX);
y = inb_p(HTCPEN_PORT_DATA);
outb_p(LSB_XY_INDEX, HTCPEN_PORT_INDEX);
xy = inb_p(HTCPEN_PORT_DATA);
/* get high resolution value of X and Y using LSB */
x = X_AXIS_MAX - ((x * 8) + ((xy >> 4) & 0xf));
y = (y * 8) + (xy & 0xf);
if (invert_x)
x = X_AXIS_MAX - x;
if (invert_y)
y = Y_AXIS_MAX - y;
if (x != X_AXIS_MAX && x != 0) {
input_report_key(htcpen_dev, BTN_TOUCH, 1);
input_report_abs(htcpen_dev, ABS_X, x);
input_report_abs(htcpen_dev, ABS_Y, y);
}
}
input_sync(htcpen_dev);
inb_p(HTCPEN_PORT_IRQ_CLEAR);
return IRQ_HANDLED;
}
static int htcpen_open(struct input_dev *dev)
{
outb_p(DEVICE_ENABLE, HTCPEN_PORT_INIT);
return 0;
}
static void htcpen_close(struct input_dev *dev)
{
outb_p(DEVICE_DISABLE, HTCPEN_PORT_INIT);
synchronize_irq(HTCPEN_IRQ);
}
static int __devinit htcpen_isa_probe(struct device *dev, unsigned int id)
{
struct input_dev *htcpen_dev;
int err = -EBUSY;
if (!request_region(HTCPEN_PORT_IRQ_CLEAR, 1, "htcpen")) {
printk(KERN_ERR "htcpen: unable to get IO region 0x%x\n",
HTCPEN_PORT_IRQ_CLEAR);
goto request_region1_failed;
}
if (!request_region(HTCPEN_PORT_INIT, 1, "htcpen")) {
printk(KERN_ERR "htcpen: unable to get IO region 0x%x\n",
HTCPEN_PORT_INIT);
goto request_region2_failed;
}
if (!request_region(HTCPEN_PORT_INDEX, 2, "htcpen")) {
printk(KERN_ERR "htcpen: unable to get IO region 0x%x\n",
HTCPEN_PORT_INDEX);
goto request_region3_failed;
}
htcpen_dev = input_allocate_device();
if (!htcpen_dev) {
printk(KERN_ERR "htcpen: can't allocate device\n");
err = -ENOMEM;
goto input_alloc_failed;
}
htcpen_dev->name = "HTC Shift EC TouchScreen";
htcpen_dev->id.bustype = BUS_ISA;
htcpen_dev->evbit[0] = BIT_MASK(EV_ABS) | BIT_MASK(EV_KEY);
htcpen_dev->keybit[BIT_WORD(BTN_TOUCH)] = BIT_MASK(BTN_TOUCH);
input_set_abs_params(htcpen_dev, ABS_X, 0, X_AXIS_MAX, 0, 0);
input_set_abs_params(htcpen_dev, ABS_Y, 0, Y_AXIS_MAX, 0, 0);
htcpen_dev->open = htcpen_open;
htcpen_dev->close = htcpen_close;
err = request_irq(HTCPEN_IRQ, htcpen_interrupt, 0, "htcpen",
htcpen_dev);
if (err) {
printk(KERN_ERR "htcpen: irq busy\n");
goto request_irq_failed;
}
inb_p(HTCPEN_PORT_IRQ_CLEAR);
err = input_register_device(htcpen_dev);
if (err)
goto input_register_failed;
dev_set_drvdata(dev, htcpen_dev);
return 0;
input_register_failed:
free_irq(HTCPEN_IRQ, htcpen_dev);
request_irq_failed:
input_free_device(htcpen_dev);
input_alloc_failed:
release_region(HTCPEN_PORT_INDEX, 2);
request_region3_failed:
release_region(HTCPEN_PORT_INIT, 1);
request_region2_failed:
release_region(HTCPEN_PORT_IRQ_CLEAR, 1);
request_region1_failed:
return err;
}
static int __devexit htcpen_isa_remove(struct device *dev, unsigned int id)
{
struct input_dev *htcpen_dev = dev_get_drvdata(dev);
input_unregister_device(htcpen_dev);
free_irq(HTCPEN_IRQ, htcpen_dev);
release_region(HTCPEN_PORT_INDEX, 2);
release_region(HTCPEN_PORT_INIT, 1);
release_region(HTCPEN_PORT_IRQ_CLEAR, 1);
dev_set_drvdata(dev, NULL);
return 0;
}
#ifdef CONFIG_PM
static int htcpen_isa_suspend(struct device *dev, unsigned int n,
pm_message_t state)
{
outb_p(DEVICE_DISABLE, HTCPEN_PORT_INIT);
return 0;
}
static int htcpen_isa_resume(struct device *dev, unsigned int n)
{
outb_p(DEVICE_ENABLE, HTCPEN_PORT_INIT);
return 0;
}
#endif
static struct isa_driver htcpen_isa_driver = {
.probe = htcpen_isa_probe,
.remove = __devexit_p(htcpen_isa_remove),
#ifdef CONFIG_PM
.suspend = htcpen_isa_suspend,
.resume = htcpen_isa_resume,
#endif
.driver = {
.owner = THIS_MODULE,
.name = "htcpen",
}
};
static struct dmi_system_id __initdata htcshift_dmi_table[] = {
{
.ident = "Shift",
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "High Tech Computer Corp"),
DMI_MATCH(DMI_PRODUCT_NAME, "Shift"),
},
},
{ }
};
static int __init htcpen_isa_init(void)
{
if (!dmi_check_system(htcshift_dmi_table))
return -ENODEV;
return isa_register_driver(&htcpen_isa_driver, 1);
}
static void __exit htcpen_isa_exit(void)
{
isa_unregister_driver(&htcpen_isa_driver);
}
module_init(htcpen_isa_init);
module_exit(htcpen_isa_exit);
|