patch-2.3.36 linux/drivers/usb/mouse.c

• Lines: 499
• Date: Wed Dec 31 16:00:00 1969
• Orig file: v2.3.35/linux/drivers/usb/mouse.c
• Orig date: Wed Dec 29 13:13:19 1999

diff -u --recursive --new-file v2.3.35/linux/drivers/usb/mouse.c linux/drivers/usb/mouse.c
@@ -1,498 +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.? Georg Acher 1999/10/30 
- * URBification for UHCI-Acher/Fliegl/Sailer
- *
- * version 0.30? Paul Ashton 1999/08/19 - Fixed behaviour on mouse
- * disconnect and suspend/resume. Added module parameter "force=1"
- * to allow opening of the mouse driver before mouse has been plugged
- * in (enables consistent XF86Config settings). Fixed module use count.
- * Documented missing blocking/non-blocking read handling (not fixed).
- * 
- * 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/version.h>
-#include <linux/kernel.h>
-#include <linux/sched.h>
-#include <linux/signal.h>
-#include <linux/errno.h>
-#include <linux/random.h>
-#include <linux/poll.h>
-#include <linux/init.h>
-#include <linux/malloc.h>
-#include <linux/module.h>
-//#include <linux/spinlock.h>
-
-#include "usb.h"
-
-#define MODSTR "mouse.c: "
-
-
-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 */
-	int suspended; /* mouse disconnected */
-	wait_queue_head_t 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 */
-
-	/* FIXME: move these to a per-mouse structure */
-	struct usb_device *dev;  /* host controller this mouse is on */
-	void* irq_handle;  /* host controller's IRQ transfer handle */
-	char* buffer;
-	urb_t* urb;
-	__u8 bEndpointAddress;  /* these are from the endpoint descriptor */
-	__u8 bInterval;		/* ...  used when calling usb_request_irq */
-};
-
-static struct mouse_state static_mouse_state;
-
-spinlock_t usb_mouse_lock = SPIN_LOCK_UNLOCKED;
-
-static int force=0; /* allow the USB mouse to be opened even if not there (yet) */
-MODULE_PARM(force,"i");
-int xxx=0;
-
-//static int mouse_irq(int state, void *__buffer, int len, void *dev_id)
-static void mouse_irq(urb_t *urb)
-{
-	signed char *data = urb->transfer_buffer;
-	int state=urb->status;
-	int len=urb->actual_length;
-	/* finding the mouse is easy when there's only one */
-	struct mouse_state *mouse = urb->context; 
-
-	if (state)
-		printk(KERN_DEBUG "%s(%d):state %d, bp %p, len %d\n",
-			__FILE__, __LINE__, state, data, len);
-	//printk("mouseirq: %i\n",xxx++);
-	/*
-	 * USB_ST_NOERROR is the normal case.
-	 * USB_ST_REMOVED occurs if mouse disconnected or suspend/resume
-	 * USB_ST_INTERNALERROR occurs if system suspended then mouse removed
-	 *    followed by resume. On UHCI could then occur every second
-	 * In both cases, suspend the mouse
-	 * On other states, ignore
-	 */
-	switch (state) {
-	case USB_ST_REMOVED:
-	case USB_ST_INTERNALERROR: 
-		printk(KERN_DEBUG "%s(%d): Suspending\n",
-			__FILE__, __LINE__);
-		mouse->suspended = 1;
-		// FIXME stop interrupt!
-		return; 
-	case USB_ST_NOERROR: break;
-	default: 
-	  return; /* ignore */
-	}	
-
-	/* if a mouse moves with no one listening, do we care? no */
-	if(!mouse->active)
-		return;
-
-	/* if the USB mouse sends an interrupt, then something noteworthy
-	   must have happened */
-	
-	mouse->buttons = data[0] & 0x0f;
-	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)
-#if LINUX_VERSION_CODE > KERNEL_VERSION(2,3,20)
-		kill_fasync(mouse->fasync, SIGIO, POLL_IN);
-#else
-		kill_fasync(mouse->fasync, SIGIO);
-#endif
-	return;
-}
-
-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);
-
-	printk(KERN_DEBUG "%s(%d): MOD_DEC\n", __FILE__, __LINE__);
-	MOD_DEC_USE_COUNT;
-
-	if (--mouse->active == 0) {
-		mouse->suspended = 0;
-		/* stop polling the mouse while its not in use */
-		usb_unlink_urb(mouse->urb);
-       	}
-
-	return 0;
-}
-
-static int open_mouse(struct inode * inode, struct file * file)
-{
-	struct mouse_state *mouse = &static_mouse_state;
-	int ret;
-	unsigned int pipe;
-
-	printk(KERN_DEBUG "%s(%d): open_mouse\n", __FILE__, __LINE__);
-	/*
-	 * First open may fail since mouse_probe() may get called after this
-	 * if module load is in response to the open
-	 * mouse_probe() sets mouse->present. This open can be delayed by
-	 * specifying force=1 in module load
-	 * This helps if you want to insert the USB mouse after starting X
-	 */
-	if (!mouse->present)
-	{
-		if (force) /* always load the driver even if no mouse (yet) */
-		{
-			printk(KERN_DEBUG "%s(%d): forced open\n",
-				__FILE__, __LINE__);
-			mouse->suspended = 1;
-		}
-		else
-			return -EINVAL;
-	}
-
-	/* prevent the driver from being unloaded while its in use */
-	printk(KERN_DEBUG "%s(%d): MOD_INC\n", __FILE__, __LINE__);
-	/* Increment use count even if already active */
-	MOD_INC_USE_COUNT;
-
-	if (mouse->active++)
-		return 0;
-	/* flush state */
-	mouse->buttons = mouse->dx = mouse->dy = mouse->dz = 0;
-
-	if (!mouse->present) /* only get here if force == 1 */
-		return 0;
-
-	/* start the usb controller's polling of the mouse */
-	pipe = usb_rcvintpipe(mouse->dev, mouse->bEndpointAddress);
-	FILL_INT_URB(mouse->urb,mouse->dev,pipe,
-		     mouse->buffer,
-		     usb_maxpacket(mouse->urb->dev, pipe, usb_pipeout(pipe)),
-		     mouse_irq,mouse,mouse->bInterval);
-
-	ret=usb_submit_urb(mouse->urb);
-
-	//	ret = usb_request_irq(mouse->dev, usb_rcvctrlpipe(mouse->dev, mouse->bEndpointAddress),
-	//		mouse_irq, mouse->bInterval,
-	//		NULL, &mouse->irq_handle);
-	if (ret) {
-		printk (KERN_WARNING "usb-mouse: usb_submit_urb(INT) failed (0x%x)\n", ret);
-		MOD_DEC_USE_COUNT;
-		return ret;
-	}
-	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..
- * In XFree86 (3.3.5 tested) you must select Protocol "NetMousePS/2",
- * then use your wheel as Button 4 and 5 via ZAxisMapping 4 5.
- * 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)
-{
-	DECLARE_WAITQUEUE(wait, current);
-	int retval = 0;
-	static int state = 0;
-	struct mouse_state *mouse = &static_mouse_state;
-
-	if (!mouse->present)
-		return 0;
-
-	if (!mouse->ready) {
-		if (file->f_flags & O_NONBLOCK) return -EAGAIN;
-
-		add_wait_queue(&mouse->wait, &wait);
-repeat:
-		set_current_state(TASK_INTERRUPTIBLE);
-		if (!mouse->ready && !signal_pending(current)) {
-			schedule();
-		goto repeat;
-		}
-		current->state = TASK_RUNNING;
-		remove_wait_queue(&mouse->wait, &wait);
-	}
-	if (signal_pending(current)) return -ERESTARTSYS;
-
-	if (!mouse->present)
-		return 0;
-	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;
-			if (!--count)
-				break;
-		}
-
-		/*
-		 * SUBTLE:
-		 *
-		 * The only way to get here is to do a read() of
-		 * more than 3 bytes: if you read a byte at a time
-		 * you will just ever see states 0-2, for backwards
-		 * compatibility.
-		 *
-		 * So you can think of this as a packet interface,
-		 * where you have arbitrary-sized packets, and you
-		 * only ever see the first three bytes when you read
-		 * them in small chunks.
-		 */
-		{ /* fallthrough - dz */
-			int dz = mouse->dz;
-			mouse->dz = 0;
-			put_user(dz, 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,
-};
-
- void* mouse_probe(struct usb_device *dev,unsigned int ifnum)
-{
-	struct usb_interface_descriptor *interface;
-	struct usb_endpoint_descriptor *endpoint;
-	struct mouse_state *mouse = &static_mouse_state;
-	int ret;
-	unsigned int pipe;
-
-	printk("mouse probe for if %i\n",ifnum);
-	/* Is it a mouse interface? */
-	interface = &dev->actconfig->interface[ifnum].altsetting[0];
-	if (interface->bInterfaceClass != 3)
-		return NULL;
-	if (interface->bInterfaceSubClass != 1)
-		return NULL;
-	if (interface->bInterfaceProtocol != 2)
-		return NULL;
-
-	/* Multiple endpoints? What kind of mutant ninja-mouse is this? */
-	if (interface->bNumEndpoints != 1)
-		return NULL;
-
-	endpoint = &interface->endpoint[0];
-
-	/* Output endpoint? Curiousier and curiousier.. */
-	if (!(endpoint->bEndpointAddress & 0x80))
-		return NULL;
-
-	/* If it's not an interrupt endpoint, we'd better punt! */
-	if ((endpoint->bmAttributes & 3) != 3)
-		return NULL;
-
-	printk("USB mouse found\n");
-
-	/* these are used to request the irq when the mouse is opened */
-	mouse->dev = dev;
-	mouse->bEndpointAddress = endpoint->bEndpointAddress;
-	mouse->bInterval = endpoint->bInterval;
-
-	mouse->present = 1;
-
-	/* This appears to let USB mouse survive disconnection and */
-	/* APM suspend/resume */
-	if (mouse->suspended)
-	{
-		printk(KERN_DEBUG "%s(%d): mouse resume\n", __FILE__, __LINE__);
-		/* restart the usb controller's polling of the mouse */
-
-		pipe = usb_rcvintpipe(mouse->dev, mouse->bEndpointAddress);
-		FILL_INT_URB(mouse->urb,mouse->dev,pipe,
-			     mouse->buffer,
-			     usb_maxpacket(mouse->urb->dev, pipe, usb_pipeout(pipe)),
-			     mouse_irq,mouse,mouse->bInterval);
-
-		ret=usb_submit_urb(mouse->urb);
-		if (ret) {
-			printk (KERN_WARNING "usb-mouse: usb_submit_urb(INT) failed (0x%x)\n", ret);
-			return NULL;
-		}
-		mouse->suspended = 0;
-	}
-
-	printk("mouse probe2\n");
-	return mouse;
-}
-
-static void mouse_disconnect(struct usb_device *dev, void *priv)
-{
-	struct mouse_state *mouse = priv;
-	
-	/* stop the usb interrupt transfer */
-	if (mouse->present) {
-		usb_unlink_urb(mouse->urb);
-		wake_up(&mouse->wait);
-	}
-
-	/* this might need work */
-	mouse->present = 0;
-	printk("Mouse disconnected\n");
-}
-
-static struct usb_driver mouse_driver = {
-	"mouse",
-	mouse_probe,
-	mouse_disconnect,
-	{ NULL, NULL },
-	&usb_mouse_fops,
-	16
-};
-
-int usb_mouse_init(void)
-{
-	struct mouse_state *mouse = &static_mouse_state;
-
-	mouse->present = mouse->active = mouse->suspended = 0;
-	mouse->buffer=kmalloc(64,GFP_KERNEL);
-
-	if (!mouse->buffer)
-	  return -ENOMEM;
-	mouse->urb=usb_alloc_urb(0);
-	if (!mouse->urb)
-	  printk(KERN_DEBUG MODSTR"URB allocation failed\n");
-
-	init_waitqueue_head(&mouse->wait);
-	mouse->fasync = NULL;
-
-	if (usb_register(&mouse_driver)<0)
-		return -1;
-
-	printk(KERN_INFO "USB HID boot protocol mouse driver registered.\n");
-	return 0;
-}
-
-void usb_mouse_cleanup(void)
-{
-	struct mouse_state *mouse = &static_mouse_state;
-
-	/* stop the usb interrupt transfer */
-	if (mouse->present) {
-		usb_unlink_urb(mouse->urb);
-       	}
-	kfree(mouse->urb);
-	kfree(mouse->buffer);
-	/* this, too, probably needs work */
-	usb_deregister(&mouse_driver);
-}
-
-#ifdef MODULE
-int init_module(void)
-{
-	return usb_mouse_init();
-}
-
-void cleanup_module(void)
-{
-	usb_mouse_cleanup();
-}
-#endif