patch-2.2.18 linux/drivers/usb/mouse.c

• Lines: 294
• Date: Thu Jan 1 01:00:00 1970
• Orig file: v2.2.17/drivers/usb/mouse.c
• Orig date: Fri Apr 21 12:46:37 2000

diff -u --new-file --recursive --exclude-from /usr/src/exclude v2.2.17/drivers/usb/mouse.c linux/drivers/usb/mouse.c
@@ -1,293 +0,0 @@
-/*
- * USB HID boot protocol mouse support based on MS BusMouse driver, psaux 
- * driver, and Linus's skeleton USB mouse driver. Fixed up a lot by Linus.
- *
- * Brad Keryan 4/3/1999
- *
- * version 0.20: Linus rewrote read_mouse() to do PS/2 and do it
- * correctly. Events are added together, not queued, to keep the rodent sober.
- *
- * version 0.02: Hmm, the mouse seems drunk because I'm queueing the events.
- * This is wrong: when an application (like X or gpm) reads the mouse device,
- * it wants to find out the mouse's current position, not its recent history.
- * The button thing turned out to be UHCI not flipping data toggle, so half the
- * packets were thrown out.
- *
- * version 0.01: Switched over to busmouse protocol, and changed the minor
- * number to 32 (same as uusbd's hidbp driver). Buttons work more sanely now, 
- * but it still doesn't generate button events unless you move the mouse.
- *
- * version 0.0: Driver emulates a PS/2 mouse, stealing /dev/psaux (sorry, I 
- * know that's not very nice). Moving in the X and Y axes works. Buttons don't
- * work right yet: X sees a lot of MotionNotify/ButtonPress/ButtonRelease 
- * combos when you hold down a button and drag the mouse around. Probably has 
- * some additional bugs on an SMP machine.
- */
-
-#include <linux/kernel.h>
-#include <linux/sched.h>
-#include <linux/signal.h>
-#include <linux/errno.h>
-#include <linux/miscdevice.h>
-#include <linux/random.h>
-#include <linux/poll.h>
-#include <linux/init.h>
-#include <linux/malloc.h>
-
-#include <asm/spinlock.h>
-
-#include "usb.h"
-
-#define USB_MOUSE_MINOR 32
-
-struct mouse_state {
-	unsigned char buttons; /* current button state */
-	long dx; /* dx, dy, dz are change since last read */
-	long dy; 
-	long dz;
-	int present; /* this mouse is plugged in */
-	int active; /* someone is has this mouse's device open */
-	int ready; /* the mouse has changed state since the last read */
-	struct wait_queue *wait; /* for polling */
-	struct fasync_struct *fasync;
-	/* later, add a list here to support multiple mice */
-	/* but we will also need a list of file pointers to identify it */
-};
-
-static struct mouse_state static_mouse_state;
-
-spinlock_t usb_mouse_lock = SPIN_LOCK_UNLOCKED;
-
-static int mouse_irq(int state, void *__buffer, void *dev_id)
-{
-	signed char *data = __buffer;
-	/* finding the mouse is easy when there's only one */
-	struct mouse_state *mouse = &static_mouse_state; 
-
-	/* if a mouse moves with no one listening, do we care? no */
-	if(!mouse->active)
-		return 1;
-
-	/* if the USB mouse sends an interrupt, then something noteworthy
-	   must have happened */
-	mouse->buttons = data[0] & 0x07;
-	mouse->dx += data[1]; /* data[] is signed, so this works */
-	mouse->dy -= data[2]; /* y-axis is reversed */
-	mouse->dz += data[3];
-	mouse->ready = 1;
-
-	add_mouse_randomness((mouse->buttons << 24) + (mouse->dz << 16 ) + 
-				     (mouse->dy << 8) + mouse->dx);
-
-	wake_up_interruptible(&mouse->wait);
-	if (mouse->fasync)
-		kill_fasync(mouse->fasync, SIGIO);
-
-	return 1;
-}
-
-static int fasync_mouse(int fd, struct file *filp, int on)
-{
-	int retval;
-	struct mouse_state *mouse = &static_mouse_state;
-
-	retval = fasync_helper(fd, filp, on, &mouse->fasync);
-	if (retval < 0)
-		return retval;
-	return 0;
-}
-
-static int release_mouse(struct inode * inode, struct file * file)
-{
-	struct mouse_state *mouse = &static_mouse_state;
-
-	fasync_mouse(-1, file, 0);
-	if (--mouse->active)
-		return 0;
-	return 0;
-}
-
-static int open_mouse(struct inode * inode, struct file * file)
-{
-	struct mouse_state *mouse = &static_mouse_state;
-
-	if (!mouse->present)
-		return -EINVAL;
-	if (mouse->active++)
-		return 0;
-	/* flush state */
-	mouse->buttons = mouse->dx = mouse->dy = mouse->dz = 0;
-	return 0;
-}
-
-static ssize_t write_mouse(struct file * file,
-       const char * buffer, size_t count, loff_t *ppos)
-{
-	return -EINVAL;
-}
-
-/*
- * Look like a PS/2 mouse, please..
- *
- * The PS/2 protocol is fairly strange, but
- * oh, well, it's at least common..
- */
-static ssize_t read_mouse(struct file * file, char * buffer, size_t count, loff_t *ppos)
-{
-	int retval = 0;
-	static int state = 0;
-	struct mouse_state *mouse = &static_mouse_state;
-
-	if (count) {
-		mouse->ready = 0;
-		switch (state) {
-		case 0: { /* buttons and sign */
-			int buttons = mouse->buttons;
-			mouse->buttons = 0;
-			if (mouse->dx < 0)
-				buttons |= 0x10;
-			if (mouse->dy < 0)
-				buttons |= 0x20;
-			put_user(buttons, buffer);
-			buffer++;
-			retval++;
-			state = 1;
-			if (!--count)
-				break;
-		}
-		case 1: { /* dx */
-			int dx = mouse->dx;
-			mouse->dx = 0;
-			put_user(dx, buffer);
-			buffer++;
-			retval++;
-			state = 2;
-			if (!--count)
-				break;
-		}
-		case 2:	{ /* dy */
-			int dy = mouse->dy;
-			mouse->dy = 0;
-			put_user(dy, buffer);
-			buffer++;
-			retval++;
-			state = 0;
-		}
-		break;
-		}
-	}
-	return retval;
-}
-
-static unsigned int mouse_poll(struct file *file, poll_table * wait)
-{
-	struct mouse_state *mouse = &static_mouse_state;
-
-	poll_wait(file, &mouse->wait, wait);
-	if (mouse->ready)
-		return POLLIN | POLLRDNORM;
-	return 0;
-}
-
-struct file_operations usb_mouse_fops = {
-	NULL,		/* mouse_seek */
-	read_mouse,
-	write_mouse,
-	NULL, 		/* mouse_readdir */
-	mouse_poll, 	/* mouse_poll */
-	NULL, 		/* mouse_ioctl */
-	NULL,		/* mouse_mmap */
-	open_mouse,
-	NULL,		/* flush */
-	release_mouse,
-	NULL,
-	fasync_mouse,
-};
-
-static struct miscdevice usb_mouse = {
-	USB_MOUSE_MINOR, "USB mouse", &usb_mouse_fops
-};
-
-static int mouse_probe(struct usb_device *dev)
-{
-	struct usb_interface_descriptor *interface;
-	struct usb_endpoint_descriptor *endpoint;
-	struct mouse_state *mouse = &static_mouse_state;
-
-	/* We don't handle multi-config mice */
-	if (dev->descriptor.bNumConfigurations != 1)
-		return -1;
-
-	/* We don't handle multi-interface mice */
-	if (dev->config[0].bNumInterfaces != 1)
-		return -1;
-
-	/* Is it a mouse interface? */
-	interface = &dev->config[0].interface[0];
-	if (interface->bInterfaceClass != 3)
-		return -1;
-	if (interface->bInterfaceSubClass != 1)
-		return -1;
-	if (interface->bInterfaceProtocol != 2)
-		return -1;
-
-	/* Multiple endpoints? What kind of mutant ninja-mouse is this? */
-	if (interface->bNumEndpoints != 1)
-		return -1;
-
-	endpoint = &interface->endpoint[0];
-
-	/* Output endpoint? Curiousier and curiousier.. */
-	if (!(endpoint->bEndpointAddress & 0x80))
-		return -1;
-
-	/* If it's not an interrupt endpoint, we'd better punt! */
-	if ((endpoint->bmAttributes & 3) != 3)
-		return -1;
-
-	printk("USB mouse found\n");
-
-	usb_set_configuration(dev, dev->config[0].bConfigurationValue);
-
-	usb_request_irq(dev, usb_rcvctrlpipe(dev, endpoint->bEndpointAddress), mouse_irq, endpoint->bInterval, NULL);
-
-	mouse->present = 1;
-	return 0;
-}
-
-static void mouse_disconnect(struct usb_device *dev)
-{
-	struct mouse_state *mouse = &static_mouse_state;
-
-	/* this might need work */
-	mouse->present = 0;
-}
-
-static struct usb_driver mouse_driver = {
-	"mouse",
-	mouse_probe,
-	mouse_disconnect,
-	{ NULL, NULL }
-};
-
-int usb_mouse_init(void)
-{
-	struct mouse_state *mouse = &static_mouse_state;
-
-	misc_register(&usb_mouse);
-
-	mouse->present = mouse->active = 0;
-	mouse->wait = NULL;
-	mouse->fasync = NULL;
-
-	usb_register(&mouse_driver);
-	printk(KERN_INFO "USB HID boot protocol mouse registered.\n");
-	return 0;
-}
-
-void usb_mouse_cleanup(void)
-{
-	/* this, too, probably needs work */
-	usb_deregister(&mouse_driver);
-	misc_deregister(&usb_mouse);
-}