Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6
[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/kernel.h>
32 #include <linux/input.h>
33 #include <linux/init.h>
34 #include <linux/slab.h>
35 #include <linux/module.h>
36 #include <linux/usb/input.h>
37 #include "usb.h"
38 #include "onetouch.h"
39 #include "debug.h"
40
41 static void onetouch_release_input(void *onetouch_);
42
43 struct usb_onetouch {
44         char name[128];
45         char phys[64];
46         struct input_dev *dev;  /* input device interface */
47         struct usb_device *udev;        /* usb device */
48
49         struct urb *irq;        /* urb for interrupt in report */
50         unsigned char *data;    /* input data */
51         dma_addr_t data_dma;
52         unsigned int is_open:1;
53 };
54
55 static void usb_onetouch_irq(struct urb *urb)
56 {
57         struct usb_onetouch *onetouch = urb->context;
58         signed char *data = onetouch->data;
59         struct input_dev *dev = onetouch->dev;
60         int status = urb->status;
61         int retval;
62
63         switch (status) {
64         case 0:                 /* success */
65                 break;
66         case -ECONNRESET:       /* unlink */
67         case -ENOENT:
68         case -ESHUTDOWN:
69                 return;
70         /* -EPIPE:  should clear the halt */
71         default:                /* error */
72                 goto resubmit;
73         }
74
75         input_report_key(dev, ONETOUCH_BUTTON, data[0] & 0x02);
76         input_sync(dev);
77
78 resubmit:
79         retval = usb_submit_urb (urb, GFP_ATOMIC);
80         if (retval)
81                 err ("can't resubmit intr, %s-%s/input0, retval %d",
82                         onetouch->udev->bus->bus_name,
83                         onetouch->udev->devpath, retval);
84 }
85
86 static int usb_onetouch_open(struct input_dev *dev)
87 {
88         struct usb_onetouch *onetouch = input_get_drvdata(dev);
89
90         onetouch->is_open = 1;
91         onetouch->irq->dev = onetouch->udev;
92         if (usb_submit_urb(onetouch->irq, GFP_KERNEL)) {
93                 err("usb_submit_urb failed");
94                 return -EIO;
95         }
96
97         return 0;
98 }
99
100 static void usb_onetouch_close(struct input_dev *dev)
101 {
102         struct usb_onetouch *onetouch = input_get_drvdata(dev);
103
104         usb_kill_urb(onetouch->irq);
105         onetouch->is_open = 0;
106 }
107
108 #ifdef CONFIG_PM
109 static void usb_onetouch_pm_hook(struct us_data *us, int action)
110 {
111         struct usb_onetouch *onetouch = (struct usb_onetouch *) us->extra;
112
113         if (onetouch->is_open) {
114                 switch (action) {
115                 case US_SUSPEND:
116                         usb_kill_urb(onetouch->irq);
117                         break;
118                 case US_RESUME:
119                         if (usb_submit_urb(onetouch->irq, GFP_KERNEL) != 0)
120                                 err("usb_submit_urb failed");
121                         break;
122                 default:
123                         break;
124                 }
125         }
126 }
127 #endif /* CONFIG_PM */
128
129 int onetouch_connect_input(struct us_data *ss)
130 {
131         struct usb_device *udev = ss->pusb_dev;
132         struct usb_host_interface *interface;
133         struct usb_endpoint_descriptor *endpoint;
134         struct usb_onetouch *onetouch;
135         struct input_dev *input_dev;
136         int pipe, maxp;
137         int error = -ENOMEM;
138
139         interface = ss->pusb_intf->cur_altsetting;
140
141         if (interface->desc.bNumEndpoints != 3)
142                 return -ENODEV;
143
144         endpoint = &interface->endpoint[2].desc;
145         if (!usb_endpoint_is_int_in(endpoint))
146                 return -ENODEV;
147
148         pipe = usb_rcvintpipe(udev, endpoint->bEndpointAddress);
149         maxp = usb_maxpacket(udev, pipe, usb_pipeout(pipe));
150
151         onetouch = kzalloc(sizeof(struct usb_onetouch), GFP_KERNEL);
152         input_dev = input_allocate_device();
153         if (!onetouch || !input_dev)
154                 goto fail1;
155
156         onetouch->data = usb_buffer_alloc(udev, ONETOUCH_PKT_LEN,
157                                           GFP_ATOMIC, &onetouch->data_dma);
158         if (!onetouch->data)
159                 goto fail1;
160
161         onetouch->irq = usb_alloc_urb(0, GFP_KERNEL);
162         if (!onetouch->irq)
163                 goto fail2;
164
165         onetouch->udev = udev;
166         onetouch->dev = input_dev;
167
168         if (udev->manufacturer)
169                 strlcpy(onetouch->name, udev->manufacturer,
170                         sizeof(onetouch->name));
171         if (udev->product) {
172                 if (udev->manufacturer)
173                         strlcat(onetouch->name, " ", sizeof(onetouch->name));
174                 strlcat(onetouch->name, udev->product, sizeof(onetouch->name));
175         }
176
177         if (!strlen(onetouch->name))
178                 snprintf(onetouch->name, sizeof(onetouch->name),
179                          "Maxtor Onetouch %04x:%04x",
180                          le16_to_cpu(udev->descriptor.idVendor),
181                          le16_to_cpu(udev->descriptor.idProduct));
182
183         usb_make_path(udev, onetouch->phys, sizeof(onetouch->phys));
184         strlcat(onetouch->phys, "/input0", sizeof(onetouch->phys));
185
186         input_dev->name = onetouch->name;
187         input_dev->phys = onetouch->phys;
188         usb_to_input_id(udev, &input_dev->id);
189         input_dev->dev.parent = &udev->dev;
190
191         set_bit(EV_KEY, input_dev->evbit);
192         set_bit(ONETOUCH_BUTTON, input_dev->keybit);
193         clear_bit(0, input_dev->keybit);
194
195         input_set_drvdata(input_dev, onetouch);
196
197         input_dev->open = usb_onetouch_open;
198         input_dev->close = usb_onetouch_close;
199
200         usb_fill_int_urb(onetouch->irq, udev, pipe, onetouch->data,
201                          (maxp > 8 ? 8 : maxp),
202                          usb_onetouch_irq, onetouch, endpoint->bInterval);
203         onetouch->irq->transfer_dma = onetouch->data_dma;
204         onetouch->irq->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
205
206         ss->extra_destructor = onetouch_release_input;
207         ss->extra = onetouch;
208 #ifdef CONFIG_PM
209         ss->suspend_resume_hook = usb_onetouch_pm_hook;
210 #endif
211
212         error = input_register_device(onetouch->dev);
213         if (error)
214                 goto fail3;
215
216         return 0;
217
218  fail3: usb_free_urb(onetouch->irq);
219  fail2: usb_buffer_free(udev, ONETOUCH_PKT_LEN,
220                         onetouch->data, onetouch->data_dma);
221  fail1: kfree(onetouch);
222         input_free_device(input_dev);
223         return error;
224 }
225
226 static void onetouch_release_input(void *onetouch_)
227 {
228         struct usb_onetouch *onetouch = (struct usb_onetouch *) onetouch_;
229
230         if (onetouch) {
231                 usb_kill_urb(onetouch->irq);
232                 input_unregister_device(onetouch->dev);
233                 usb_free_urb(onetouch->irq);
234                 usb_buffer_free(onetouch->udev, ONETOUCH_PKT_LEN,
235                                 onetouch->data, onetouch->data_dma);
236         }
237 }