drivers/usb/input/usbmouse.c

   1 /*
   2  * $Id: usbmouse.c,v 1.15 2001/12/27 10:37:41 vojtech Exp $
   3  *
   4  *  Copyright (c) 1999-2001 Vojtech Pavlik
   5  *
   6  *  USB HIDBP Mouse support
   7  */
   8
   9 /*
  10  * This program is free software; you can redistribute it and/or modify
  11  * it under the terms of the GNU General Public License as published by
  12  * the Free Software Foundation; either version 2 of the License, or
  13  * (at your option) any later version.
  14  *
  15  * This program is distributed in the hope that it will be useful,
  16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18  * GNU General Public License for more details.
  19  *
  20  * You should have received a copy of the GNU General Public License
  21  * along with this program; if not, write to the Free Software
  22  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  23  *
  24  * Should you need to contact me, the author, you can do so either by
  25  * e-mail - mail your message to <vojtech@ucw.cz>, or by paper mail:
  26  * Vojtech Pavlik, Simunkova 1594, Prague 8, 182 00 Czech Republic
  27  */
  28
  29 #include <linux/kernel.h>
  30 #include <linux/slab.h>
  31 #include <linux/input.h>
  32 #include <linux/module.h>
  33 #include <linux/init.h>
  34 #include <linux/usb.h>
  35
  36 /*
  37  * Version Information
  38  */
  39 #define DRIVER_VERSION "v1.6"
  40 #define DRIVER_AUTHOR "Vojtech Pavlik <vojtech@ucw.cz>"
  41 #define DRIVER_DESC "USB HID Boot Protocol mouse driver"
  42 #define DRIVER_LICENSE "GPL"
  43
  44 MODULE_AUTHOR(DRIVER_AUTHOR);
  45 MODULE_DESCRIPTION(DRIVER_DESC);
  46 MODULE_LICENSE(DRIVER_LICENSE);
  47
  48 struct usb_mouse {
  49         char name[128];
  50         char phys[64];
  51         struct usb_device *usbdev;
  52         struct input_dev dev;
  53         struct urb *irq;
  54         int open;
  55
  56         signed char *data;
  57         dma_addr_t data_dma;
  58 };
  59
  60 static void usb_mouse_irq(struct urb *urb, struct pt_regs *regs)
  61 {
  62         struct usb_mouse *mouse = urb->context;
  63         signed char *data = mouse->data;
  64         struct input_dev *dev = &mouse->dev;
  65         int status;
  66
  67         switch (urb->status) {
  68         case 0:                 /* success */
  69                 break;
  70         case -ECONNRESET:       /* unlink */
  71         case -ENOENT:
  72         case -ESHUTDOWN:
  73                 return;
  74         /* -EPIPE:  should clear the halt */
  75         default:                /* error */
  76                 goto resubmit;
  77         }
  78
  79         input_regs(dev, regs);
  80
  81         input_report_key(dev, BTN_LEFT,   data[0] & 0x01);
  82         input_report_key(dev, BTN_RIGHT,  data[0] & 0x02);
  83         input_report_key(dev, BTN_MIDDLE, data[0] & 0x04);
  84         input_report_key(dev, BTN_SIDE,   data[0] & 0x08);
  85         input_report_key(dev, BTN_EXTRA,  data[0] & 0x10);
  86
  87         input_report_rel(dev, REL_X,     data[1]);
  88         input_report_rel(dev, REL_Y,     data[2]);
  89         input_report_rel(dev, REL_WHEEL, data[3]);
  90
  91         input_sync(dev);
  92 resubmit:
  93         status = usb_submit_urb (urb, SLAB_ATOMIC);
  94         if (status)
  95                 err ("can't resubmit intr, %s-%s/input0, status %d",
  96                                 mouse->usbdev->bus->bus_name,
  97                                 mouse->usbdev->devpath, status);
  98 }
  99
 100 static int usb_mouse_open(struct input_dev *dev)
 101 {
 102         struct usb_mouse *mouse = dev->private;
 103
 104         if (mouse->open++)
 105                 return 0;
 106
 107         mouse->irq->dev = mouse->usbdev;
 108         if (usb_submit_urb(mouse->irq, GFP_KERNEL)) {
 109                 mouse->open--;
 110                 return -EIO;
 111         }
 112
 113         return 0;
 114 }
 115
 116 static void usb_mouse_close(struct input_dev *dev)
 117 {
 118         struct usb_mouse *mouse = dev->private;
 119
 120         if (!--mouse->open)
 121                 usb_kill_urb(mouse->irq);
 122 }
 123
 124 static int usb_mouse_probe(struct usb_interface * intf, const struct usb_device_id * id)
 125 {
 126         struct usb_device * dev = interface_to_usbdev(intf);
 127         struct usb_host_interface *interface;
 128         struct usb_endpoint_descriptor *endpoint;
 129         struct usb_mouse *mouse;
 130         int pipe, maxp;
 131         char path[64];
 132
 133         interface = intf->cur_altsetting;
 134
 135         if (interface->desc.bNumEndpoints != 1)
 136                 return -ENODEV;
 137
 138         endpoint = &interface->endpoint[0].desc;
 139         if (!(endpoint->bEndpointAddress & 0x80))
 140                 return -ENODEV;
 141         if ((endpoint->bmAttributes & 3) != 3)
 142                 return -ENODEV;
 143
 144         pipe = usb_rcvintpipe(dev, endpoint->bEndpointAddress);
 145         maxp = usb_maxpacket(dev, pipe, usb_pipeout(pipe));
 146
 147         if (!(mouse = kmalloc(sizeof(struct usb_mouse), GFP_KERNEL)))
 148                 return -ENOMEM;
 149         memset(mouse, 0, sizeof(struct usb_mouse));
 150
 151         mouse->data = usb_buffer_alloc(dev, 8, SLAB_ATOMIC, &mouse->data_dma);
 152         if (!mouse->data) {
 153                 kfree(mouse);
 154                 return -ENOMEM;
 155         }
 156
 157         mouse->irq = usb_alloc_urb(0, GFP_KERNEL);
 158         if (!mouse->irq) {
 159                 usb_buffer_free(dev, 8, mouse->data, mouse->data_dma);
 160                 kfree(mouse);
 161                 return -ENODEV;
 162         }
 163
 164         mouse->usbdev = dev;
 165
 166         mouse->dev.evbit[0] = BIT(EV_KEY) | BIT(EV_REL);
 167         mouse->dev.keybit[LONG(BTN_MOUSE)] = BIT(BTN_LEFT) | BIT(BTN_RIGHT) | BIT(BTN_MIDDLE);
 168         mouse->dev.relbit[0] = BIT(REL_X) | BIT(REL_Y);
 169         mouse->dev.keybit[LONG(BTN_MOUSE)] |= BIT(BTN_SIDE) | BIT(BTN_EXTRA);
 170         mouse->dev.relbit[0] |= BIT(REL_WHEEL);
 171
 172         mouse->dev.private = mouse;
 173         mouse->dev.open = usb_mouse_open;
 174         mouse->dev.close = usb_mouse_close;
 175
 176         usb_make_path(dev, path, 64);
 177         sprintf(mouse->phys, "%s/input0", path);
 178
 179         mouse->dev.name = mouse->name;
 180         mouse->dev.phys = mouse->phys;
 181         mouse->dev.id.bustype = BUS_USB;
 182         mouse->dev.id.vendor = le16_to_cpu(dev->descriptor.idVendor);
 183         mouse->dev.id.product = le16_to_cpu(dev->descriptor.idProduct);
 184         mouse->dev.id.version = le16_to_cpu(dev->descriptor.bcdDevice);
 185         mouse->dev.dev = &intf->dev;
 186
 187         if (dev->manufacturer)
 188                 strcat(mouse->name, dev->manufacturer);
 189         if (dev->product)
 190                 sprintf(mouse->name, "%s %s", mouse->name, dev->product);
 191
 192         if (!strlen(mouse->name))
 193                 sprintf(mouse->name, "USB HIDBP Mouse %04x:%04x",
 194                         mouse->dev.id.vendor, mouse->dev.id.product);
 195
 196         usb_fill_int_urb(mouse->irq, dev, pipe, mouse->data,
 197                          (maxp > 8 ? 8 : maxp),
 198                          usb_mouse_irq, mouse, endpoint->bInterval);
 199         mouse->irq->transfer_dma = mouse->data_dma;
 200         mouse->irq->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
 201
 202         input_register_device(&mouse->dev);
 203         printk(KERN_INFO "input: %s on %s\n", mouse->name, path);
 204
 205         usb_set_intfdata(intf, mouse);
 206         return 0;
 207 }
 208
 209 static void usb_mouse_disconnect(struct usb_interface *intf)
 210 {
 211         struct usb_mouse *mouse = usb_get_intfdata (intf);
 212
 213         usb_set_intfdata(intf, NULL);
 214         if (mouse) {
 215                 usb_kill_urb(mouse->irq);
 216                 input_unregister_device(&mouse->dev);
 217                 usb_free_urb(mouse->irq);
 218                 usb_buffer_free(interface_to_usbdev(intf), 8, mouse->data, mouse->data_dma);
 219                 kfree(mouse);
 220         }
 221 }
 222
 223 static struct usb_device_id usb_mouse_id_table [] = {
 224         { USB_INTERFACE_INFO(3, 1, 2) },
 225     { }                                         /* Terminating entry */
 226 };
 227
 228 MODULE_DEVICE_TABLE (usb, usb_mouse_id_table);
 229
 230 static struct usb_driver usb_mouse_driver = {
 231         .owner          = THIS_MODULE,
 232         .name           = "usbmouse",
 233         .probe          = usb_mouse_probe,
 234         .disconnect     = usb_mouse_disconnect,
 235         .id_table       = usb_mouse_id_table,
 236 };
 237
 238 static int __init usb_mouse_init(void)
 239 {
 240         int retval = usb_register(&usb_mouse_driver);
 241         if (retval == 0)
 242                 info(DRIVER_VERSION ":" DRIVER_DESC);
 243         return retval;
 244 }
 245
 246 static void __exit usb_mouse_exit(void)
 247 {
 248         usb_deregister(&usb_mouse_driver);
 249 }
 250
 251 module_init(usb_mouse_init);
 252 module_exit(usb_mouse_exit);