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 000000000000..0c74918fe254
--- /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);