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/*

 * $Id: usbmouse.c,v 1.1 2004-09-13 15:04:47 giacomo Exp $

 *

 *  Copyright (c) 1999-2001 Vojtech Pavlik

 *

 *  USB HIDBP Mouse support

 */

/*

 * 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/kernel.h>

#include <linux/slab.h>

#include <linux/input.h>

#include <linux/module.h>

#include <linux/init.h>

#include <linux/usb.h>

/*

 * Version Information

 */

#define DRIVER_VERSION "v1.6"

#define DRIVER_AUTHOR "Vojtech Pavlik <vojtech@ucw.cz>"

#define DRIVER_DESC "USB HID Boot Protocol mouse driver"

#define DRIVER_LICENSE "GPL"

MODULE_AUTHOR(DRIVER_AUTHOR);

MODULE_DESCRIPTION(DRIVER_DESC);

MODULE_LICENSE(DRIVER_LICENSE);

struct usb_mouse {

        char name[128];

        char phys[64];

        struct usb_device *usbdev;

        struct input_dev dev;

        struct urb *irq;

        int open;

        signed char *data;

        dma_addr_t data_dma;

};

static void usb_mouse_irq(struct urb *urb, struct pt_regs *regs)

{

        struct usb_mouse *mouse = urb->context;

        signed char *data = mouse->data;

        struct input_dev *dev = &mouse->dev;

        int status;

        switch (urb->status) {

        case 0:                 /* success */

                break;

        case -ECONNRESET:       /* unlink */

        case -ENOENT:

        case -ESHUTDOWN:

                return;

        /* -EPIPE:  should clear the halt */

        default:                /* error */

                goto resubmit;

        }

        input_regs(dev, regs);

        input_report_key(dev, BTN_LEFT,   data[0] & 0x01);

        input_report_key(dev, BTN_RIGHT,  data[0] & 0x02);

        input_report_key(dev, BTN_MIDDLE, data[0] & 0x04);

        input_report_key(dev, BTN_SIDE,   data[0] & 0x08);

        input_report_key(dev, BTN_EXTRA,  data[0] & 0x10);

        input_report_rel(dev, REL_X,     data[1]);

        input_report_rel(dev, REL_Y,     data[2]);

        input_report_rel(dev, REL_WHEEL, data[3]);

        input_sync(dev);

resubmit:

        status = usb_submit_urb (urb, SLAB_ATOMIC);

        if (status)

                err ("can't resubmit intr, %s-%s/input0, status %d",

                                mouse->usbdev->bus->bus_name,

                                mouse->usbdev->devpath, status);

}

static int usb_mouse_open(struct input_dev *dev)

{

        struct usb_mouse *mouse = dev->private;

        if (mouse->open++)

                return 0;

        mouse->irq->dev = mouse->usbdev;

        if (usb_submit_urb(mouse->irq, GFP_KERNEL)) {

                mouse->open--;

                return -EIO;

        }

        return 0;

}

static void usb_mouse_close(struct input_dev *dev)

{

        struct usb_mouse *mouse = dev->private;

        if (!--mouse->open)

                usb_unlink_urb(mouse->irq);

}

static int usb_mouse_probe(struct usb_interface * intf, const struct usb_device_id * id)

{

        struct usb_device * dev = interface_to_usbdev(intf);

        struct usb_host_interface *interface;

        struct usb_endpoint_descriptor *endpoint;

        struct usb_mouse *mouse;

        int pipe, maxp;

        char path[64];

        char *buf;

        interface = &intf->altsetting[intf->act_altsetting];

        if (interface->desc.bNumEndpoints != 1)

                return -ENODEV;

        endpoint = &interface->endpoint[0].desc;

        if (!(endpoint->bEndpointAddress & 0x80))

                return -ENODEV;

        if ((endpoint->bmAttributes & 3) != 3)

                return -ENODEV;

        pipe = usb_rcvintpipe(dev, endpoint->bEndpointAddress);

        maxp = usb_maxpacket(dev, pipe, usb_pipeout(pipe));

        if (!(mouse = kmalloc(sizeof(struct usb_mouse), GFP_KERNEL)))

                return -ENOMEM;

        memset(mouse, 0, sizeof(struct usb_mouse));

        mouse->data = usb_buffer_alloc(dev, 8, SLAB_ATOMIC, &mouse->data_dma);

        if (!mouse->data) {

                kfree(mouse);

                return -ENOMEM;

        }

        mouse->irq = usb_alloc_urb(0, GFP_KERNEL);

        if (!mouse->irq) {

                usb_buffer_free(dev, 8, mouse->data, mouse->data_dma);

                kfree(mouse);

                return -ENODEV;

        }

        mouse->usbdev = dev;

        mouse->dev.evbit[0] = BIT(EV_KEY) | BIT(EV_REL);

        mouse->dev.keybit[LONG(BTN_MOUSE)] = BIT(BTN_LEFT) | BIT(BTN_RIGHT) | BIT(BTN_MIDDLE);

        mouse->dev.relbit[0] = BIT(REL_X) | BIT(REL_Y);

        mouse->dev.keybit[LONG(BTN_MOUSE)] |= BIT(BTN_SIDE) | BIT(BTN_EXTRA);

        mouse->dev.relbit[0] |= BIT(REL_WHEEL);

        mouse->dev.private = mouse;

        mouse->dev.open = usb_mouse_open;

        mouse->dev.close = usb_mouse_close;

        usb_make_path(dev, path, 64);

        sprintf26(mouse->phys, "%s/input0", path);

        mouse->dev.name = mouse->name;

        mouse->dev.phys = mouse->phys;

        mouse->dev.id.bustype = BUS_USB;

        mouse->dev.id.vendor = dev->descriptor.idVendor;

        mouse->dev.id.product = dev->descriptor.idProduct;

        mouse->dev.id.version = dev->descriptor.bcdDevice;

        if (!(buf = kmalloc(63, GFP_KERNEL))) {

                usb_buffer_free(dev, 8, mouse->data, mouse->data_dma);

                kfree(mouse);

                return -ENOMEM;

        }

        if (dev->descriptor.iManufacturer &&

                usb_string(dev, dev->descriptor.iManufacturer, buf, 63) > 0)

                        strcat(mouse->name, buf);

        if (dev->descriptor.iProduct &&

                usb_string(dev, dev->descriptor.iProduct, buf, 63) > 0)

                        sprintf26(mouse->name, "%s %s", mouse->name, buf);

        if (!strlen(mouse->name))

                sprintf26(mouse->name, "USB HIDBP Mouse %04x:%04x",

                        mouse->dev.id.vendor, mouse->dev.id.product);

        kfree(buf);

        usb_fill_int_urb(mouse->irq, dev, pipe, mouse->data,

                         (maxp > 8 ? 8 : maxp),

                         usb_mouse_irq, mouse, endpoint->bInterval);

        mouse->irq->transfer_dma = mouse->data_dma;

        mouse->irq->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;

        input_register_device(&mouse->dev);

        printk(KERN_INFO "input: %s on %s\n", mouse->name, path);

        usb_set_intfdata(intf, mouse);

        return 0;

}

static void usb_mouse_disconnect(struct usb_interface *intf)

{

        struct usb_mouse *mouse = usb_get_intfdata (intf);

        usb_set_intfdata(intf, NULL);

        if (mouse) {

                usb_unlink_urb(mouse->irq);

                input_unregister_device(&mouse->dev);

                usb_free_urb(mouse->irq);

                usb_buffer_free(interface_to_usbdev(intf), 8, mouse->data, mouse->data_dma);

                kfree(mouse);

        }

}

static struct usb_device_id usb_mouse_id_table [] = {

        { USB_INTERFACE_INFO(3, 1, 2) },

    { }                                         /* Terminating entry */

};

MODULE_DEVICE_TABLE (usb, usb_mouse_id_table);

static struct usb_driver usb_mouse_driver = {

        .owner          = THIS_MODULE,

        .name           = "usbmouse",

        .probe          = usb_mouse_probe,

        .disconnect     = usb_mouse_disconnect,

        .id_table       = usb_mouse_id_table,

};

/*static*/ int __init usb_mouse_init(void)

{

        int retval = usb_register(&usb_mouse_driver);

        if (retval == 0)

                info(DRIVER_VERSION ":" DRIVER_DESC);

        return retval;

}

/*static*/ void __exit usb_mouse_exit(void)

{

        usb_deregister(&usb_mouse_driver);

}

module_init(usb_mouse_init);

module_exit(usb_mouse_exit);