Merge branch 'topic/misc' into topic/pcsp-fix
[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                 dev_err(&dev->dev, "can't resubmit intr, %s-%s/input0, "
82                         "retval %d\n", 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                 dev_err(&dev->dev, "usb_submit_urb failed\n");
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                                 dev_err(&onetouch->irq->dev->dev,
121                                         "usb_submit_urb failed\n");
122                         break;
123                 default:
124                         break;
125                 }
126         }
127 }
128 #endif /* CONFIG_PM */
129
130 int onetouch_connect_input(struct us_data *ss)
131 {
132         struct usb_device *udev = ss->pusb_dev;
133         struct usb_host_interface *interface;
134         struct usb_endpoint_descriptor *endpoint;
135         struct usb_onetouch *onetouch;
136         struct input_dev *input_dev;
137         int pipe, maxp;
138         int error = -ENOMEM;
139
140         interface = ss->pusb_intf->cur_altsetting;
141
142         if (interface->desc.bNumEndpoints != 3)
143                 return -ENODEV;
144
145         endpoint = &interface->endpoint[2].desc;
146         if (!usb_endpoint_is_int_in(endpoint))
147                 return -ENODEV;
148
149         pipe = usb_rcvintpipe(udev, endpoint->bEndpointAddress);
150         maxp = usb_maxpacket(udev, pipe, usb_pipeout(pipe));
151
152         onetouch = kzalloc(sizeof(struct usb_onetouch), GFP_KERNEL);
153         input_dev = input_allocate_device();
154         if (!onetouch || !input_dev)
155                 goto fail1;
156
157         onetouch->data = usb_buffer_alloc(udev, ONETOUCH_PKT_LEN,
158                                           GFP_ATOMIC, &onetouch->data_dma);
159         if (!onetouch->data)
160                 goto fail1;
161
162         onetouch->irq = usb_alloc_urb(0, GFP_KERNEL);
163         if (!onetouch->irq)
164                 goto fail2;
165
166         onetouch->udev = udev;
167         onetouch->dev = input_dev;
168
169         if (udev->manufacturer)
170                 strlcpy(onetouch->name, udev->manufacturer,
171                         sizeof(onetouch->name));
172         if (udev->product) {
173                 if (udev->manufacturer)
174                         strlcat(onetouch->name, " ", sizeof(onetouch->name));
175                 strlcat(onetouch->name, udev->product, sizeof(onetouch->name));
176         }
177
178         if (!strlen(onetouch->name))
179                 snprintf(onetouch->name, sizeof(onetouch->name),
180                          "Maxtor Onetouch %04x:%04x",
181                          le16_to_cpu(udev->descriptor.idVendor),
182                          le16_to_cpu(udev->descriptor.idProduct));
183
184         usb_make_path(udev, onetouch->phys, sizeof(onetouch->phys));
185         strlcat(onetouch->phys, "/input0", sizeof(onetouch->phys));
186
187         input_dev->name = onetouch->name;
188         input_dev->phys = onetouch->phys;
189         usb_to_input_id(udev, &input_dev->id);
190         input_dev->dev.parent = &udev->dev;
191
192         set_bit(EV_KEY, input_dev->evbit);
193         set_bit(ONETOUCH_BUTTON, input_dev->keybit);
194         clear_bit(0, input_dev->keybit);
195
196         input_set_drvdata(input_dev, onetouch);
197
198         input_dev->open = usb_onetouch_open;
199         input_dev->close = usb_onetouch_close;
200
201         usb_fill_int_urb(onetouch->irq, udev, pipe, onetouch->data,
202                          (maxp > 8 ? 8 : maxp),
203                          usb_onetouch_irq, onetouch, endpoint->bInterval);
204         onetouch->irq->transfer_dma = onetouch->data_dma;
205         onetouch->irq->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
206
207         ss->extra_destructor = onetouch_release_input;
208         ss->extra = onetouch;
209 #ifdef CONFIG_PM
210         ss->suspend_resume_hook = usb_onetouch_pm_hook;
211 #endif
212
213         error = input_register_device(onetouch->dev);
214         if (error)
215                 goto fail3;
216
217         return 0;
218
219  fail3: usb_free_urb(onetouch->irq);
220  fail2: usb_buffer_free(udev, ONETOUCH_PKT_LEN,
221                         onetouch->data, onetouch->data_dma);
222  fail1: kfree(onetouch);
223         input_free_device(input_dev);
224         return error;
225 }
226
227 static void onetouch_release_input(void *onetouch_)
228 {
229         struct usb_onetouch *onetouch = (struct usb_onetouch *) onetouch_;
230
231         if (onetouch) {
232                 usb_kill_urb(onetouch->irq);
233                 input_unregister_device(onetouch->dev);
234                 usb_free_urb(onetouch->irq);
235                 usb_buffer_free(onetouch->udev, ONETOUCH_PKT_LEN,
236                                 onetouch->data, onetouch->data_dma);
237         }
238 }