USB HID: usbkbd/usbmouse - handle errors when registering devices
[linux-2.6.git] / drivers / hid / usbhid / 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/module.h>
32 #include <linux/init.h>
33 #include <linux/usb/input.h>
34 #include <linux/hid.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
55         signed char *data;
56         dma_addr_t data_dma;
57 };
58
59 static void usb_mouse_irq(struct urb *urb)
60 {
61         struct usb_mouse *mouse = urb->context;
62         signed char *data = mouse->data;
63         struct input_dev *dev = mouse->dev;
64         int status;
65
66         switch (urb->status) {
67         case 0:                 /* success */
68                 break;
69         case -ECONNRESET:       /* unlink */
70         case -ENOENT:
71         case -ESHUTDOWN:
72                 return;
73         /* -EPIPE:  should clear the halt */
74         default:                /* error */
75                 goto resubmit;
76         }
77
78         input_report_key(dev, BTN_LEFT,   data[0] & 0x01);
79         input_report_key(dev, BTN_RIGHT,  data[0] & 0x02);
80         input_report_key(dev, BTN_MIDDLE, data[0] & 0x04);
81         input_report_key(dev, BTN_SIDE,   data[0] & 0x08);
82         input_report_key(dev, BTN_EXTRA,  data[0] & 0x10);
83
84         input_report_rel(dev, REL_X,     data[1]);
85         input_report_rel(dev, REL_Y,     data[2]);
86         input_report_rel(dev, REL_WHEEL, data[3]);
87
88         input_sync(dev);
89 resubmit:
90         status = usb_submit_urb (urb, GFP_ATOMIC);
91         if (status)
92                 err ("can't resubmit intr, %s-%s/input0, status %d",
93                                 mouse->usbdev->bus->bus_name,
94                                 mouse->usbdev->devpath, status);
95 }
96
97 static int usb_mouse_open(struct input_dev *dev)
98 {
99         struct usb_mouse *mouse = dev->private;
100
101         mouse->irq->dev = mouse->usbdev;
102         if (usb_submit_urb(mouse->irq, GFP_KERNEL))
103                 return -EIO;
104
105         return 0;
106 }
107
108 static void usb_mouse_close(struct input_dev *dev)
109 {
110         struct usb_mouse *mouse = dev->private;
111
112         usb_kill_urb(mouse->irq);
113 }
114
115 static int usb_mouse_probe(struct usb_interface *intf, const struct usb_device_id *id)
116 {
117         struct usb_device *dev = interface_to_usbdev(intf);
118         struct usb_host_interface *interface;
119         struct usb_endpoint_descriptor *endpoint;
120         struct usb_mouse *mouse;
121         struct input_dev *input_dev;
122         int pipe, maxp;
123         int error = -ENOMEM;
124
125         interface = intf->cur_altsetting;
126
127         if (interface->desc.bNumEndpoints != 1)
128                 return -ENODEV;
129
130         endpoint = &interface->endpoint[0].desc;
131         if (!usb_endpoint_is_int_in(endpoint))
132                 return -ENODEV;
133
134         pipe = usb_rcvintpipe(dev, endpoint->bEndpointAddress);
135         maxp = usb_maxpacket(dev, pipe, usb_pipeout(pipe));
136
137         mouse = kzalloc(sizeof(struct usb_mouse), GFP_KERNEL);
138         input_dev = input_allocate_device();
139         if (!mouse || !input_dev)
140                 goto fail1;
141
142         mouse->data = usb_buffer_alloc(dev, 8, GFP_ATOMIC, &mouse->data_dma);
143         if (!mouse->data)
144                 goto fail1;
145
146         mouse->irq = usb_alloc_urb(0, GFP_KERNEL);
147         if (!mouse->irq)
148                 goto fail2;
149
150         mouse->usbdev = dev;
151         mouse->dev = input_dev;
152
153         if (dev->manufacturer)
154                 strlcpy(mouse->name, dev->manufacturer, sizeof(mouse->name));
155
156         if (dev->product) {
157                 if (dev->manufacturer)
158                         strlcat(mouse->name, " ", sizeof(mouse->name));
159                 strlcat(mouse->name, dev->product, sizeof(mouse->name));
160         }
161
162         if (!strlen(mouse->name))
163                 snprintf(mouse->name, sizeof(mouse->name),
164                          "USB HIDBP Mouse %04x:%04x",
165                          le16_to_cpu(dev->descriptor.idVendor),
166                          le16_to_cpu(dev->descriptor.idProduct));
167
168         usb_make_path(dev, mouse->phys, sizeof(mouse->phys));
169         strlcat(mouse->phys, "/input0", sizeof(mouse->phys));
170
171         input_dev->name = mouse->name;
172         input_dev->phys = mouse->phys;
173         usb_to_input_id(dev, &input_dev->id);
174         input_dev->cdev.dev = &intf->dev;
175
176         input_dev->evbit[0] = BIT(EV_KEY) | BIT(EV_REL);
177         input_dev->keybit[LONG(BTN_MOUSE)] = BIT(BTN_LEFT) | BIT(BTN_RIGHT) | BIT(BTN_MIDDLE);
178         input_dev->relbit[0] = BIT(REL_X) | BIT(REL_Y);
179         input_dev->keybit[LONG(BTN_MOUSE)] |= BIT(BTN_SIDE) | BIT(BTN_EXTRA);
180         input_dev->relbit[0] |= BIT(REL_WHEEL);
181
182         input_dev->private = mouse;
183         input_dev->open = usb_mouse_open;
184         input_dev->close = usb_mouse_close;
185
186         usb_fill_int_urb(mouse->irq, dev, pipe, mouse->data,
187                          (maxp > 8 ? 8 : maxp),
188                          usb_mouse_irq, mouse, endpoint->bInterval);
189         mouse->irq->transfer_dma = mouse->data_dma;
190         mouse->irq->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
191
192         error = input_register_device(mouse->dev);
193         if (error)
194                 goto fail3;
195
196         usb_set_intfdata(intf, mouse);
197         return 0;
198
199 fail3:  
200         usb_free_urb(mouse->irq);
201 fail2:  
202         usb_buffer_free(dev, 8, mouse->data, mouse->data_dma);
203 fail1:  
204         input_free_device(input_dev);
205         kfree(mouse);
206         return error;
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(USB_INTERFACE_CLASS_HID, USB_INTERFACE_SUBCLASS_BOOT,
225                 USB_INTERFACE_PROTOCOL_MOUSE) },
226         { }     /* Terminating entry */
227 };
228
229 MODULE_DEVICE_TABLE (usb, usb_mouse_id_table);
230
231 static struct usb_driver usb_mouse_driver = {
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);