Merge master.kernel.org:/pub/scm/linux/kernel/git/davej/agpgart
[linux-2.6] / drivers / usb / storage / onetouch.c
1 /*
2  * Support for the Maxtor OneTouch USB hard drive's button
3  *
4  * Current development and maintenance by:
5  *      Copyright (c) 2005 Nick Sillik <n.sillik@temple.edu>
6  *
7  * Initial work by:
8  *      Copyright (c) 2003 Erik Thyren <erth7411@student.uu.se>
9  *
10  * Based on usbmouse.c (Vojtech Pavlik) and xpad.c (Marko Friedemann)
11  *
12  */
13
14 /*
15  * This program is free software; you can redistribute it and/or modify
16  * it under the terms of the GNU General Public License as published by
17  * the Free Software Foundation; either version 2 of the License, or
18  * (at your option) any later version.
19  *
20  * This program is distributed in the hope that it will be useful,
21  * but WITHOUT ANY WARRANTY; without even the implied warranty of
22  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
23  * GNU General Public License for more details.
24  *
25  * You should have received a copy of the GNU General Public License
26  * along with this program; if not, write to the Free Software
27  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
28  *
29  */
30
31 #include <linux/config.h>
32 #include <linux/kernel.h>
33 #include <linux/input.h>
34 #include <linux/init.h>
35 #include <linux/slab.h>
36 #include <linux/module.h>
37 #include <linux/usb.h>
38 #include <linux/usb_ch9.h>
39 #include <linux/usb_input.h>
40 #include "usb.h"
41 #include "onetouch.h"
42 #include "debug.h"
43
44 void onetouch_release_input(void *onetouch_);
45
46 struct usb_onetouch {
47         char name[128];
48         char phys[64];
49         struct input_dev dev;   /* input device interface */
50         struct usb_device *udev;        /* usb device */
51
52         struct urb *irq;        /* urb for interrupt in report */
53         unsigned char *data;    /* input data */
54         dma_addr_t data_dma;
55 };
56
57 static void usb_onetouch_irq(struct urb *urb, struct pt_regs *regs)
58 {
59         struct usb_onetouch *onetouch = urb->context;
60         signed char *data = onetouch->data;
61         struct input_dev *dev = &onetouch->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_regs(dev, regs);
77
78         input_report_key(&onetouch->dev, ONETOUCH_BUTTON,
79                          data[0] & 0x02);
80
81         input_sync(dev);
82 resubmit:
83         status = usb_submit_urb (urb, SLAB_ATOMIC);
84         if (status)
85                 err ("can't resubmit intr, %s-%s/input0, status %d",
86                         onetouch->udev->bus->bus_name,
87                         onetouch->udev->devpath, status);
88 }
89
90 static int usb_onetouch_open(struct input_dev *dev)
91 {
92         struct usb_onetouch *onetouch = dev->private;
93
94         onetouch->irq->dev = onetouch->udev;
95         if (usb_submit_urb(onetouch->irq, GFP_KERNEL)) {
96                 err("usb_submit_urb failed");
97                 return -EIO;
98         }
99
100         return 0;
101 }
102
103 static void usb_onetouch_close(struct input_dev *dev)
104 {
105         struct usb_onetouch *onetouch = dev->private;
106
107         usb_kill_urb(onetouch->irq);
108 }
109
110 int onetouch_connect_input(struct us_data *ss)
111 {
112         struct usb_device *udev = ss->pusb_dev;
113         struct usb_host_interface *interface;
114         struct usb_endpoint_descriptor *endpoint;
115         struct usb_onetouch *onetouch;
116         int pipe, maxp;
117         char path[64];
118
119         interface = ss->pusb_intf->cur_altsetting;
120
121         if (interface->desc.bNumEndpoints != 3)
122                 return -ENODEV;
123
124         endpoint = &interface->endpoint[2].desc;
125         if(!(endpoint->bEndpointAddress & USB_DIR_IN))
126                 return -ENODEV;
127         if((endpoint->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK)
128                         != USB_ENDPOINT_XFER_INT)
129                 return -ENODEV;
130
131         pipe = usb_rcvintpipe(udev, endpoint->bEndpointAddress);
132         maxp = usb_maxpacket(udev, pipe, usb_pipeout(pipe));
133
134         if (!(onetouch = kcalloc(1, sizeof(struct usb_onetouch), GFP_KERNEL)))
135                 return -ENOMEM;
136
137         onetouch->data = usb_buffer_alloc(udev, ONETOUCH_PKT_LEN,
138                                           SLAB_ATOMIC, &onetouch->data_dma);
139         if (!onetouch->data){
140                 kfree(onetouch);
141                 return -ENOMEM;
142         }
143
144         onetouch->irq = usb_alloc_urb(0, GFP_KERNEL);
145         if (!onetouch->irq){
146                 kfree(onetouch);
147                 usb_buffer_free(udev, ONETOUCH_PKT_LEN,
148                                 onetouch->data, onetouch->data_dma);
149                 return -ENODEV;
150         }
151
152
153         onetouch->udev = udev;
154
155         set_bit(EV_KEY, onetouch->dev.evbit);
156         set_bit(ONETOUCH_BUTTON, onetouch->dev.keybit);
157         clear_bit(0, onetouch->dev.keybit);
158
159         onetouch->dev.private = onetouch;
160         onetouch->dev.open = usb_onetouch_open;
161         onetouch->dev.close = usb_onetouch_close;
162
163         usb_make_path(udev, path, sizeof(path));
164         sprintf(onetouch->phys, "%s/input0", path);
165
166         onetouch->dev.name = onetouch->name;
167         onetouch->dev.phys = onetouch->phys;
168
169         usb_to_input_id(udev, &onetouch->dev.id);
170
171         onetouch->dev.dev = &udev->dev;
172
173         if (udev->manufacturer)
174                 strcat(onetouch->name, udev->manufacturer);
175         if (udev->product)
176                 sprintf(onetouch->name, "%s %s", onetouch->name,
177                         udev->product);
178         if (!strlen(onetouch->name))
179                 sprintf(onetouch->name, "Maxtor Onetouch %04x:%04x",
180                         onetouch->dev.id.vendor, onetouch->dev.id.product);
181
182         usb_fill_int_urb(onetouch->irq, udev, pipe, onetouch->data,
183                          (maxp > 8 ? 8 : maxp),
184                          usb_onetouch_irq, onetouch, endpoint->bInterval);
185         onetouch->irq->transfer_dma = onetouch->data_dma;
186         onetouch->irq->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
187
188         ss->extra_destructor = onetouch_release_input;
189         ss->extra = onetouch;
190
191         input_register_device(&onetouch->dev);
192         printk(KERN_INFO "usb-input: %s on %s\n", onetouch->dev.name, path);
193
194         return 0;
195 }
196
197 void onetouch_release_input(void *onetouch_)
198 {
199         struct usb_onetouch *onetouch = (struct usb_onetouch *) onetouch_;
200
201         if (onetouch) {
202                 usb_kill_urb(onetouch->irq);
203                 input_unregister_device(&onetouch->dev);
204                 usb_free_urb(onetouch->irq);
205                 usb_buffer_free(onetouch->udev, ONETOUCH_PKT_LEN,
206                                 onetouch->data, onetouch->data_dma);
207                 printk(KERN_INFO "usb-input: deregistering %s\n",
208                                 onetouch->dev.name);
209         }
210 }