forked from Qortal/Brooklyn
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
215 lines
5.6 KiB
215 lines
5.6 KiB
// SPDX-License-Identifier: GPL-2.0-only |
|
/* |
|
* ICS MK712 touchscreen controller driver |
|
* |
|
* Copyright (c) 1999-2002 Transmeta Corporation |
|
* Copyright (c) 2005 Rick Koch <[email protected]> |
|
* Copyright (c) 2005 Vojtech Pavlik <[email protected]> |
|
*/ |
|
|
|
|
|
/* |
|
* This driver supports the ICS MicroClock MK712 TouchScreen controller, |
|
* found in Gateway AOL Connected Touchpad computers. |
|
* |
|
* Documentation for ICS MK712 can be found at: |
|
* https://www.idt.com/general-parts/mk712-touch-screen-controller |
|
*/ |
|
|
|
/* |
|
* 1999-12-18: original version, Daniel Quinlan |
|
* 1999-12-19: added anti-jitter code, report pen-up events, fixed mk712_poll |
|
* to use queue_empty, Nathan Laredo |
|
* 1999-12-20: improved random point rejection, Nathan Laredo |
|
* 2000-01-05: checked in new anti-jitter code, changed mouse protocol, fixed |
|
* queue code, added module options, other fixes, Daniel Quinlan |
|
* 2002-03-15: Clean up for kernel merge <[email protected]> |
|
* Fixed multi open race, fixed memory checks, fixed resource |
|
* allocation, fixed close/powerdown bug, switched to new init |
|
* 2005-01-18: Ported to 2.6 from 2.4.28, Rick Koch |
|
* 2005-02-05: Rewritten for the input layer, Vojtech Pavlik |
|
* |
|
*/ |
|
|
|
#include <linux/module.h> |
|
#include <linux/kernel.h> |
|
#include <linux/init.h> |
|
#include <linux/errno.h> |
|
#include <linux/delay.h> |
|
#include <linux/ioport.h> |
|
#include <linux/interrupt.h> |
|
#include <linux/input.h> |
|
#include <asm/io.h> |
|
|
|
MODULE_AUTHOR("Daniel Quinlan <[email protected]>, Vojtech Pavlik <[email protected]>"); |
|
MODULE_DESCRIPTION("ICS MicroClock MK712 TouchScreen driver"); |
|
MODULE_LICENSE("GPL"); |
|
|
|
static unsigned int mk712_io = 0x260; /* Also 0x200, 0x208, 0x300 */ |
|
module_param_hw_named(io, mk712_io, uint, ioport, 0); |
|
MODULE_PARM_DESC(io, "I/O base address of MK712 touchscreen controller"); |
|
|
|
static unsigned int mk712_irq = 10; /* Also 12, 14, 15 */ |
|
module_param_hw_named(irq, mk712_irq, uint, irq, 0); |
|
MODULE_PARM_DESC(irq, "IRQ of MK712 touchscreen controller"); |
|
|
|
/* eight 8-bit registers */ |
|
#define MK712_STATUS 0 |
|
#define MK712_X 2 |
|
#define MK712_Y 4 |
|
#define MK712_CONTROL 6 |
|
#define MK712_RATE 7 |
|
|
|
/* status */ |
|
#define MK712_STATUS_TOUCH 0x10 |
|
#define MK712_CONVERSION_COMPLETE 0x80 |
|
|
|
/* control */ |
|
#define MK712_ENABLE_INT 0x01 |
|
#define MK712_INT_ON_CONVERSION_COMPLETE 0x02 |
|
#define MK712_INT_ON_CHANGE_IN_TOUCH_STATUS 0x04 |
|
#define MK712_ENABLE_PERIODIC_CONVERSIONS 0x10 |
|
#define MK712_READ_ONE_POINT 0x20 |
|
#define MK712_POWERUP 0x40 |
|
|
|
static struct input_dev *mk712_dev; |
|
static DEFINE_SPINLOCK(mk712_lock); |
|
|
|
static irqreturn_t mk712_interrupt(int irq, void *dev_id) |
|
{ |
|
unsigned char status; |
|
static int debounce = 1; |
|
static unsigned short last_x; |
|
static unsigned short last_y; |
|
|
|
spin_lock(&mk712_lock); |
|
|
|
status = inb(mk712_io + MK712_STATUS); |
|
|
|
if (~status & MK712_CONVERSION_COMPLETE) { |
|
debounce = 1; |
|
goto end; |
|
} |
|
|
|
if (~status & MK712_STATUS_TOUCH) { |
|
debounce = 1; |
|
input_report_key(mk712_dev, BTN_TOUCH, 0); |
|
goto end; |
|
} |
|
|
|
if (debounce) { |
|
debounce = 0; |
|
goto end; |
|
} |
|
|
|
input_report_key(mk712_dev, BTN_TOUCH, 1); |
|
input_report_abs(mk712_dev, ABS_X, last_x); |
|
input_report_abs(mk712_dev, ABS_Y, last_y); |
|
|
|
end: |
|
last_x = inw(mk712_io + MK712_X) & 0x0fff; |
|
last_y = inw(mk712_io + MK712_Y) & 0x0fff; |
|
input_sync(mk712_dev); |
|
spin_unlock(&mk712_lock); |
|
return IRQ_HANDLED; |
|
} |
|
|
|
static int mk712_open(struct input_dev *dev) |
|
{ |
|
unsigned long flags; |
|
|
|
spin_lock_irqsave(&mk712_lock, flags); |
|
|
|
outb(0, mk712_io + MK712_CONTROL); /* Reset */ |
|
|
|
outb(MK712_ENABLE_INT | MK712_INT_ON_CONVERSION_COMPLETE | |
|
MK712_INT_ON_CHANGE_IN_TOUCH_STATUS | |
|
MK712_ENABLE_PERIODIC_CONVERSIONS | |
|
MK712_POWERUP, mk712_io + MK712_CONTROL); |
|
|
|
outb(10, mk712_io + MK712_RATE); /* 187 points per second */ |
|
|
|
spin_unlock_irqrestore(&mk712_lock, flags); |
|
|
|
return 0; |
|
} |
|
|
|
static void mk712_close(struct input_dev *dev) |
|
{ |
|
unsigned long flags; |
|
|
|
spin_lock_irqsave(&mk712_lock, flags); |
|
|
|
outb(0, mk712_io + MK712_CONTROL); |
|
|
|
spin_unlock_irqrestore(&mk712_lock, flags); |
|
} |
|
|
|
static int __init mk712_init(void) |
|
{ |
|
int err; |
|
|
|
if (!request_region(mk712_io, 8, "mk712")) { |
|
printk(KERN_WARNING "mk712: unable to get IO region\n"); |
|
return -ENODEV; |
|
} |
|
|
|
outb(0, mk712_io + MK712_CONTROL); |
|
|
|
if ((inw(mk712_io + MK712_X) & 0xf000) || /* Sanity check */ |
|
(inw(mk712_io + MK712_Y) & 0xf000) || |
|
(inw(mk712_io + MK712_STATUS) & 0xf333)) { |
|
printk(KERN_WARNING "mk712: device not present\n"); |
|
err = -ENODEV; |
|
goto fail1; |
|
} |
|
|
|
mk712_dev = input_allocate_device(); |
|
if (!mk712_dev) { |
|
printk(KERN_ERR "mk712: not enough memory\n"); |
|
err = -ENOMEM; |
|
goto fail1; |
|
} |
|
|
|
mk712_dev->name = "ICS MicroClock MK712 TouchScreen"; |
|
mk712_dev->phys = "isa0260/input0"; |
|
mk712_dev->id.bustype = BUS_ISA; |
|
mk712_dev->id.vendor = 0x0005; |
|
mk712_dev->id.product = 0x0001; |
|
mk712_dev->id.version = 0x0100; |
|
|
|
mk712_dev->open = mk712_open; |
|
mk712_dev->close = mk712_close; |
|
|
|
mk712_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS); |
|
mk712_dev->keybit[BIT_WORD(BTN_TOUCH)] = BIT_MASK(BTN_TOUCH); |
|
input_set_abs_params(mk712_dev, ABS_X, 0, 0xfff, 88, 0); |
|
input_set_abs_params(mk712_dev, ABS_Y, 0, 0xfff, 88, 0); |
|
|
|
if (request_irq(mk712_irq, mk712_interrupt, 0, "mk712", mk712_dev)) { |
|
printk(KERN_WARNING "mk712: unable to get IRQ\n"); |
|
err = -EBUSY; |
|
goto fail1; |
|
} |
|
|
|
err = input_register_device(mk712_dev); |
|
if (err) |
|
goto fail2; |
|
|
|
return 0; |
|
|
|
fail2: free_irq(mk712_irq, mk712_dev); |
|
fail1: input_free_device(mk712_dev); |
|
release_region(mk712_io, 8); |
|
return err; |
|
} |
|
|
|
static void __exit mk712_exit(void) |
|
{ |
|
input_unregister_device(mk712_dev); |
|
free_irq(mk712_irq, mk712_dev); |
|
release_region(mk712_io, 8); |
|
} |
|
|
|
module_init(mk712_init); |
|
module_exit(mk712_exit);
|
|
|