patch-2.3.13 linux/drivers/char/logibusmouse.c

• Lines: 158
• Date: Mon Aug 2 09:54:29 1999
• Orig file: v2.3.12/linux/drivers/char/logibusmouse.c
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.3.12/linux/drivers/char/logibusmouse.c linux/drivers/char/logibusmouse.c
@@ -0,0 +1,157 @@
+/*
+ * Logitech Bus Mouse Driver for Linux
+ * by James Banks
+ *
+ * Mods by Matthew Dillon
+ *   calls verify_area()
+ *   tracks better when X is busy or paging
+ *
+ * Heavily modified by David Giller
+ *   changed from queue- to counter- driven
+ *   hacked out a (probably incorrect) mouse_select
+ *
+ * Modified again by Nathan Laredo to interface with
+ *   0.96c-pl1 IRQ handling changes (13JUL92)
+ *   didn't bother touching select code.
+ *
+ * Modified the select() code blindly to conform to the VFS
+ *   requirements. 92.07.14 - Linus. Somebody should test it out.
+ *
+ * Modified by Johan Myreen to make room for other mice (9AUG92)
+ *   removed assignment chr_fops[10] = &mouse_fops; see mouse.c
+ *   renamed mouse_fops => bus_mouse_fops, made bus_mouse_fops public.
+ *   renamed this file mouse.c => busmouse.c
+ *
+ * Minor addition by Cliff Matthews
+ *   added fasync support
+ *
+ * Modularised 6-Sep-95 Philip Blundell <pjb27@cam.ac.uk> 
+ *
+ * Replaced dumb busy loop with udelay()  16 Nov 95
+ *   Nathan Laredo <laredo@gnu.ai.mit.edu>
+ *
+ * Track I/O ports with request_region().  12 Dec 95 Philip Blundell
+ *
+ * Converted to use new generic busmouse code.  5 Apr 1998
+ *   Russell King <rmk@arm.uk.linux.org>
+ */
+
+#include <linux/module.h>
+
+#include <linux/kernel.h>
+#include <linux/sched.h>
+#include <linux/logibusmouse.h>
+#include <linux/signal.h>
+#include <linux/errno.h>
+#include <linux/mm.h>
+#include <linux/poll.h>
+#include <linux/miscdevice.h>
+#include <linux/random.h>
+#include <linux/delay.h>
+#include <linux/ioport.h>
+#include <linux/init.h>
+
+#include <asm/io.h>
+#include <asm/uaccess.h>
+#include <asm/system.h>
+#include <asm/irq.h>
+
+#include "busmouse.h"
+
+static int msedev;
+static int mouse_irq = MOUSE_IRQ;
+
+#ifdef MODULE
+MODULE_PARM(mouse_irq, "i");
+#endif
+
+void __init bmouse_setup(char *str, int *ints)
+{
+	if (ints[0] > 0)
+		mouse_irq=ints[1];
+}
+
+static void mouse_interrupt(int irq, void *dev_id, struct pt_regs *regs)
+{
+	char dx, dy;
+	unsigned char buttons;
+
+	outb(MSE_READ_X_LOW, MSE_CONTROL_PORT);
+	dx = (inb(MSE_DATA_PORT) & 0xf);
+	outb(MSE_READ_X_HIGH, MSE_CONTROL_PORT);
+	dx |= (inb(MSE_DATA_PORT) & 0xf) << 4;
+	outb(MSE_READ_Y_LOW, MSE_CONTROL_PORT );
+	dy = (inb(MSE_DATA_PORT) & 0xf);
+	outb(MSE_READ_Y_HIGH, MSE_CONTROL_PORT);
+	buttons = inb(MSE_DATA_PORT);
+	dy |= (buttons & 0xf) << 4;
+	buttons = ((buttons >> 5) & 0x07);
+	busmouse_add_movementbuttons(msedev, dx, -dy, buttons);
+	MSE_INT_ON();
+}
+
+/*
+ * close access to the mouse
+ */
+static int close_mouse(struct inode * inode, struct file * file)
+{
+	MSE_INT_OFF();
+	free_irq(mouse_irq, NULL);
+	MOD_DEC_USE_COUNT;
+	return 0;
+}
+
+/*
+ * open access to the mouse
+ */
+
+static int open_mouse(struct inode * inode, struct file * file)
+{
+	if (request_irq(mouse_irq, mouse_interrupt, 0, "busmouse", NULL))
+		return -EBUSY;
+	MOD_INC_USE_COUNT;
+	MSE_INT_ON();
+	return 0;
+}
+
+static struct busmouse busmouse = {
+	LOGITECH_BUSMOUSE, "busmouse", open_mouse, close_mouse, 7
+};
+
+int __init bus_mouse_init(void)
+{
+	if (check_region(LOGIBM_BASE, LOGIBM_EXTENT))
+		return -EIO;
+
+	outb(MSE_CONFIG_BYTE, MSE_CONFIG_PORT);
+	outb(MSE_SIGNATURE_BYTE, MSE_SIGNATURE_PORT);
+	udelay(100L);	/* wait for reply from mouse */
+	if (inb(MSE_SIGNATURE_PORT) != MSE_SIGNATURE_BYTE)
+		return -EIO;
+
+	outb(MSE_DEFAULT_MODE, MSE_CONFIG_PORT);
+	MSE_INT_OFF();
+	
+	request_region(LOGIBM_BASE, LOGIBM_EXTENT, "busmouse");
+
+	msedev = register_busmouse(&busmouse);
+	if (msedev < 0)
+		printk(KERN_WARNING "Unable to register busmouse driver.\n");
+	else
+		printk(KERN_INFO "Logitech busmouse installed.\n");
+	return msedev < 0 ? msedev : 0;
+}
+
+#ifdef MODULE
+
+int init_module(void)
+{
+	return bus_mouse_init();
+}
+
+void cleanup_module(void)
+{
+	unregister_busmouse(msedev);
+	release_region(LOGIBM_BASE, LOGIBM_EXTENT);
+}
+#endif