diff options
Diffstat (limited to 'drivers/input/mouse/pc110pad.c')
| -rw-r--r-- | drivers/input/mouse/pc110pad.c | 178 |
1 files changed, 178 insertions, 0 deletions
diff --git a/drivers/input/mouse/pc110pad.c b/drivers/input/mouse/pc110pad.c new file mode 100644 index 00000000000..0c74918fe25 --- /dev/null +++ b/drivers/input/mouse/pc110pad.c @@ -0,0 +1,178 @@ +/* + * $Id: pc110pad.c,v 1.12 2001/09/25 10:12:07 vojtech Exp $ + * + * Copyright (c) 2000-2001 Vojtech Pavlik + * + * Based on the work of: + * Alan Cox Robin O'Leary + */ + +/* + * IBM PC110 touchpad driver for Linux + */ + +/* + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + * + * Should you need to contact me, the author, you can do so either by + * e-mail - mail your message to <vojtech@ucw.cz>, or by paper mail: + * Vojtech Pavlik, Simunkova 1594, Prague 8, 182 00 Czech Republic + */ + +#include <linux/module.h> +#include <linux/kernel.h> +#include <linux/errno.h> +#include <linux/ioport.h> +#include <linux/input.h> +#include <linux/init.h> +#include <linux/interrupt.h> +#include <linux/pci.h> + +#include <asm/io.h> +#include <asm/irq.h> + +MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>"); +MODULE_DESCRIPTION("IBM PC110 touchpad driver"); +MODULE_LICENSE("GPL"); + +#define PC110PAD_OFF 0x30 +#define PC110PAD_ON 0x38 + +static int pc110pad_irq = 10; +static int pc110pad_io = 0x15e0; + +static struct input_dev pc110pad_dev; +static int pc110pad_data[3]; +static int pc110pad_count; +static int pc110pad_used; + +static char *pc110pad_name = "IBM PC110 TouchPad"; +static char *pc110pad_phys = "isa15e0/input0"; + +static irqreturn_t pc110pad_interrupt(int irq, void *ptr, struct pt_regs *regs) +{ + int value = inb_p(pc110pad_io); + int handshake = inb_p(pc110pad_io + 2); + + outb_p(handshake | 1, pc110pad_io + 2); + outb_p(handshake & ~1, pc110pad_io + 2); + inb_p(0x64); + + pc110pad_data[pc110pad_count++] = value; + + if (pc110pad_count < 3) + return IRQ_HANDLED; + + input_regs(&pc110pad_dev, regs); + input_report_key(&pc110pad_dev, BTN_TOUCH, + pc110pad_data[0] & 0x01); + input_report_abs(&pc110pad_dev, ABS_X, + pc110pad_data[1] | ((pc110pad_data[0] << 3) & 0x80) | ((pc110pad_data[0] << 1) & 0x100)); + input_report_abs(&pc110pad_dev, ABS_Y, + pc110pad_data[2] | ((pc110pad_data[0] << 4) & 0x80)); + input_sync(&pc110pad_dev); + + pc110pad_count = 0; + return IRQ_HANDLED; +} + +static void pc110pad_close(struct input_dev *dev) +{ + if (!--pc110pad_used) + outb(PC110PAD_OFF, pc110pad_io + 2); +} + +static int pc110pad_open(struct input_dev *dev) +{ + if (pc110pad_used++) + return 0; + + pc110pad_interrupt(0,NULL,NULL); + pc110pad_interrupt(0,NULL,NULL); + pc110pad_interrupt(0,NULL,NULL); + outb(PC110PAD_ON, pc110pad_io + 2); + pc110pad_count = 0; + + return 0; +} + +/* + * We try to avoid enabling the hardware if it's not + * there, but we don't know how to test. But we do know + * that the PC110 is not a PCI system. So if we find any + * PCI devices in the machine, we don't have a PC110. + */ +static int __init pc110pad_init(void) +{ + struct pci_dev *dev; + + dev = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, NULL); + if (dev) { + pci_dev_put(dev); + return -ENOENT; + } + + if (!request_region(pc110pad_io, 4, "pc110pad")) { + printk(KERN_ERR "pc110pad: I/O area %#x-%#x in use.\n", + pc110pad_io, pc110pad_io + 4); + return -EBUSY; + } + + outb(PC110PAD_OFF, pc110pad_io + 2); + + if (request_irq(pc110pad_irq, pc110pad_interrupt, 0, "pc110pad", NULL)) + { + release_region(pc110pad_io, 4); + printk(KERN_ERR "pc110pad: Unable to get irq %d.\n", pc110pad_irq); + return -EBUSY; + } + + pc110pad_dev.evbit[0] = BIT(EV_KEY) | BIT(EV_ABS); + pc110pad_dev.absbit[0] = BIT(ABS_X) | BIT(ABS_Y); + pc110pad_dev.keybit[LONG(BTN_TOUCH)] = BIT(BTN_TOUCH); + + pc110pad_dev.absmax[ABS_X] = 0x1ff; + pc110pad_dev.absmax[ABS_Y] = 0x0ff; + + pc110pad_dev.open = pc110pad_open; + pc110pad_dev.close = pc110pad_close; + + pc110pad_dev.name = pc110pad_name; + pc110pad_dev.phys = pc110pad_phys; + pc110pad_dev.id.bustype = BUS_ISA; + pc110pad_dev.id.vendor = 0x0003; + pc110pad_dev.id.product = 0x0001; + pc110pad_dev.id.version = 0x0100; + + input_register_device(&pc110pad_dev); + + printk(KERN_INFO "input: %s at %#x irq %d\n", + pc110pad_name, pc110pad_io, pc110pad_irq); + + return 0; +} + +static void __exit pc110pad_exit(void) +{ + input_unregister_device(&pc110pad_dev); + + outb(PC110PAD_OFF, pc110pad_io + 2); + + free_irq(pc110pad_irq, NULL); + release_region(pc110pad_io, 4); +} + +module_init(pc110pad_init); +module_exit(pc110pad_exit); |