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