drivers/hid/usbhid/usbmouse.c

   1 /*
   2  *  Copyright (c) 1999-2001 Vojtech Pavlik
   3  *
   4  *  USB HIDBP Mouse support
   5  */
   6
   7 /*
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License as published by
  10  * the Free Software Foundation; either version 2 of the License, or
  11  * (at your option) any later version.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  * GNU General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * along with this program; if not, write to the Free Software
  20  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  21  *
  22  * Should you need to contact me, the author, you can do so either by
  23  * e-mail - mail your message to <vojtech@ucw.cz>, or by paper mail:
  24  * Vojtech Pavlik, Simunkova 1594, Prague 8, 182 00 Czech Republic
  25  */
  26
  27 #include <linux/kernel.h>
  28 #include <linux/slab.h>
  29 #include <linux/module.h>
  30 #include <linux/init.h>
  31 #include <linux/usb/input.h>
  32 #include <linux/hid.h>
  33
  34 /*
  35  * Version Information
  36  */
  37 #define DRIVER_VERSION "v1.6"
  38 #define DRIVER_AUTHOR "Vojtech Pavlik <vojtech@ucw.cz>"
  39 #define DRIVER_DESC "USB HID Boot Protocol mouse driver"
  40 #define DRIVER_LICENSE "GPL"
  41
  42 MODULE_AUTHOR(DRIVER_AUTHOR);
  43 MODULE_DESCRIPTION(DRIVER_DESC);
  44 MODULE_LICENSE(DRIVER_LICENSE);
  45
  46 struct usb_mouse {
  47         char name[128];
  48         char phys[64];
  49         struct usb_device *usbdev;
  50         struct input_dev *dev;
  51         struct urb *irq;
  52
  53         signed char *data;
  54         dma_addr_t data_dma;
  55 };
  56
  57 static void usb_mouse_irq(struct urb *urb)
  58 {
  59         struct usb_mouse *mouse = urb->context;
  60         signed char *data = mouse->data;
  61         struct input_dev *dev = mouse->dev;
  62         int status;
  63
  64         switch (urb->status) {
  65         case 0:                 /* success */
  66                 break;
  67         case -ECONNRESET:       /* unlink */
  68         case -ENOENT:
  69         case -ESHUTDOWN:
  70                 return;
  71         /* -EPIPE:  should clear the halt */
  72         default:                /* error */
  73                 goto resubmit;
  74         }
  75
  76         input_report_key(dev, BTN_LEFT,   data[0] & 0x01);
  77         input_report_key(dev, BTN_RIGHT,  data[0] & 0x02);
  78         input_report_key(dev, BTN_MIDDLE, data[0] & 0x04);
  79         input_report_key(dev, BTN_SIDE,   data[0] & 0x08);
  80         input_report_key(dev, BTN_EXTRA,  data[0] & 0x10);
  81
  82         input_report_rel(dev, REL_X,     data[1]);
  83         input_report_rel(dev, REL_Y,     data[2]);
  84         input_report_rel(dev, REL_WHEEL, data[3]);
  85
  86         input_sync(dev);
  87 resubmit:
  88         status = usb_submit_urb (urb, GFP_ATOMIC);
  89         if (status)
  90                 err ("can't resubmit intr, %s-%s/input0, status %d",
  91                                 mouse->usbdev->bus->bus_name,
  92                                 mouse->usbdev->devpath, status);
  93 }
  94
  95 static int usb_mouse_open(struct input_dev *dev)
  96 {
  97         struct usb_mouse *mouse = input_get_drvdata(dev);
  98
  99         mouse->irq->dev = mouse->usbdev;
 100         if (usb_submit_urb(mouse->irq, GFP_KERNEL))
 101                 return -EIO;
 102
 103         return 0;
 104 }
 105
 106 static void usb_mouse_close(struct input_dev *dev)
 107 {
 108         struct usb_mouse *mouse = input_get_drvdata(dev);
 109
 110         usb_kill_urb(mouse->irq);
 111 }
 112
 113 static int usb_mouse_probe(struct usb_interface *intf, const struct usb_device_id *id)
 114 {
 115         struct usb_device *dev = interface_to_usbdev(intf);
 116         struct usb_host_interface *interface;
 117         struct usb_endpoint_descriptor *endpoint;
 118         struct usb_mouse *mouse;
 119         struct input_dev *input_dev;
 120         int pipe, maxp;
 121         int error = -ENOMEM;
 122
 123         interface = intf->cur_altsetting;
 124
 125         if (interface->desc.bNumEndpoints != 1)
 126                 return -ENODEV;
 127
 128         endpoint = &interface->endpoint[0].desc;
 129         if (!usb_endpoint_is_int_in(endpoint))
 130                 return -ENODEV;
 131
 132         pipe = usb_rcvintpipe(dev, endpoint->bEndpointAddress);
 133         maxp = usb_maxpacket(dev, pipe, usb_pipeout(pipe));
 134
 135         mouse = kzalloc(sizeof(struct usb_mouse), GFP_KERNEL);
 136         input_dev = input_allocate_device();
 137         if (!mouse || !input_dev)
 138                 goto fail1;
 139
 140         mouse->data = usb_buffer_alloc(dev, 8, GFP_ATOMIC, &mouse->data_dma);
 141         if (!mouse->data)
 142                 goto fail1;
 143
 144         mouse->irq = usb_alloc_urb(0, GFP_KERNEL);
 145         if (!mouse->irq)
 146                 goto fail2;
 147
 148         mouse->usbdev = dev;
 149         mouse->dev = input_dev;
 150
 151         if (dev->manufacturer)
 152                 strlcpy(mouse->name, dev->manufacturer, sizeof(mouse->name));
 153
 154         if (dev->product) {
 155                 if (dev->manufacturer)
 156                         strlcat(mouse->name, " ", sizeof(mouse->name));
 157                 strlcat(mouse->name, dev->product, sizeof(mouse->name));
 158         }
 159
 160         if (!strlen(mouse->name))
 161                 snprintf(mouse->name, sizeof(mouse->name),
 162                          "USB HIDBP Mouse %04x:%04x",
 163                          le16_to_cpu(dev->descriptor.idVendor),
 164                          le16_to_cpu(dev->descriptor.idProduct));
 165
 166         usb_make_path(dev, mouse->phys, sizeof(mouse->phys));
 167         strlcat(mouse->phys, "/input0", sizeof(mouse->phys));
 168
 169         input_dev->name = mouse->name;
 170         input_dev->phys = mouse->phys;
 171         usb_to_input_id(dev, &input_dev->id);
 172         input_dev->dev.parent = &intf->dev;
 173
 174         input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REL);
 175         input_dev->keybit[BIT_WORD(BTN_MOUSE)] = BIT_MASK(BTN_LEFT) |
 176                 BIT_MASK(BTN_RIGHT) | BIT_MASK(BTN_MIDDLE);
 177         input_dev->relbit[0] = BIT_MASK(REL_X) | BIT_MASK(REL_Y);
 178         input_dev->keybit[BIT_WORD(BTN_MOUSE)] |= BIT_MASK(BTN_SIDE) |
 179                 BIT_MASK(BTN_EXTRA);
 180         input_dev->relbit[0] |= BIT_MASK(REL_WHEEL);
 181
 182         input_set_drvdata(input_dev, mouse);
 183
 184         input_dev->open = usb_mouse_open;
 185         input_dev->close = usb_mouse_close;
 186
 187         usb_fill_int_urb(mouse->irq, dev, pipe, mouse->data,
 188                          (maxp > 8 ? 8 : maxp),
 189                          usb_mouse_irq, mouse, endpoint->bInterval);
 190         mouse->irq->transfer_dma = mouse->data_dma;
 191         mouse->irq->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
 192
 193         error = input_register_device(mouse->dev);
 194         if (error)
 195                 goto fail3;
 196
 197         usb_set_intfdata(intf, mouse);
 198         return 0;
 199
 200 fail3:
 201         usb_free_urb(mouse->irq);
 202 fail2:
 203         usb_buffer_free(dev, 8, mouse->data, mouse->data_dma);
 204 fail1:
 205         input_free_device(input_dev);
 206         kfree(mouse);
 207         return error;
 208 }
 209
 210 static void usb_mouse_disconnect(struct usb_interface *intf)
 211 {
 212         struct usb_mouse *mouse = usb_get_intfdata (intf);
 213
 214         usb_set_intfdata(intf, NULL);
 215         if (mouse) {
 216                 usb_kill_urb(mouse->irq);
 217                 input_unregister_device(mouse->dev);
 218                 usb_free_urb(mouse->irq);
 219                 usb_buffer_free(interface_to_usbdev(intf), 8, mouse->data, mouse->data_dma);
 220                 kfree(mouse);
 221         }
 222 }
 223
 224 static struct usb_device_id usb_mouse_id_table [] = {
 225         { USB_INTERFACE_INFO(USB_INTERFACE_CLASS_HID, USB_INTERFACE_SUBCLASS_BOOT,
 226                 USB_INTERFACE_PROTOCOL_MOUSE) },
 227         { }     /* Terminating entry */
 228 };
 229
 230 MODULE_DEVICE_TABLE (usb, usb_mouse_id_table);
 231
 232 static struct usb_driver usb_mouse_driver = {
 233         .name           = "usbmouse",
 234         .probe          = usb_mouse_probe,
 235         .disconnect     = usb_mouse_disconnect,
 236         .id_table       = usb_mouse_id_table,
 237 };
 238
 239 static int __init usb_mouse_init(void)
 240 {
 241         int retval = usb_register(&usb_mouse_driver);
 242         if (retval == 0)
 243                 info(DRIVER_VERSION ":" DRIVER_DESC);
 244         return retval;
 245 }
 246
 247 static void __exit usb_mouse_exit(void)
 248 {
 249         usb_deregister(&usb_mouse_driver);
 250 }
 251
 252 module_init(usb_mouse_init);
 253 module_exit(usb_mouse_exit);