Merge branch 'upstream-linus' of master.kernel.org:/pub/scm/linux/kernel/git/jgarzik...
[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_ch9.h>
37 #include <linux/usb/input.h>
38 #include "usb.h"
39 #include "onetouch.h"
40 #include "debug.h"
41
42 void onetouch_release_input(void *onetouch_);
43
44 struct usb_onetouch {
45         char name[128];
46         char phys[64];
47         struct input_dev *dev;  /* input device interface */
48         struct usb_device *udev;        /* usb device */
49
50         struct urb *irq;        /* urb for interrupt in report */
51         unsigned char *data;    /* input data */
52         dma_addr_t data_dma;
53         unsigned int is_open:1;
54 };
55
56 static void usb_onetouch_irq(struct urb *urb, struct pt_regs *regs)
57 {
58         struct usb_onetouch *onetouch = urb->context;
59         signed char *data = onetouch->data;
60         struct input_dev *dev = onetouch->dev;
61         int status;
62
63         switch (urb->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_regs(dev, regs);
76         input_report_key(dev, ONETOUCH_BUTTON, data[0] & 0x02);
77         input_sync(dev);
78
79 resubmit:
80         status = usb_submit_urb (urb, SLAB_ATOMIC);
81         if (status)
82                 err ("can't resubmit intr, %s-%s/input0, status %d",
83                         onetouch->udev->bus->bus_name,
84                         onetouch->udev->devpath, status);
85 }
86
87 static int usb_onetouch_open(struct input_dev *dev)
88 {
89         struct usb_onetouch *onetouch = dev->private;
90
91         onetouch->is_open = 1;
92         onetouch->irq->dev = onetouch->udev;
93         if (usb_submit_urb(onetouch->irq, GFP_KERNEL)) {
94                 err("usb_submit_urb failed");
95                 return -EIO;
96         }
97
98         return 0;
99 }
100
101 static void usb_onetouch_close(struct input_dev *dev)
102 {
103         struct usb_onetouch *onetouch = dev->private;
104
105         usb_kill_urb(onetouch->irq);
106         onetouch->is_open = 0;
107 }
108
109 #ifdef CONFIG_PM
110 static void usb_onetouch_pm_hook(struct us_data *us, int action)
111 {
112         struct usb_onetouch *onetouch = (struct usb_onetouch *) us->extra;
113
114         if (onetouch->is_open) {
115                 switch (action) {
116                 case US_SUSPEND:
117                         usb_kill_urb(onetouch->irq);
118                         break;
119                 case US_RESUME:
120                         if (usb_submit_urb(onetouch->irq, GFP_KERNEL) != 0)
121                                 err("usb_submit_urb failed");
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 (!(endpoint->bEndpointAddress & USB_DIR_IN))
147                 return -ENODEV;
148         if ((endpoint->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK)
149                         != USB_ENDPOINT_XFER_INT)
150                 return -ENODEV;
151
152         pipe = usb_rcvintpipe(udev, endpoint->bEndpointAddress);
153         maxp = usb_maxpacket(udev, pipe, usb_pipeout(pipe));
154
155         onetouch = kzalloc(sizeof(struct usb_onetouch), GFP_KERNEL);
156         input_dev = input_allocate_device();
157         if (!onetouch || !input_dev)
158                 goto fail1;
159
160         onetouch->data = usb_buffer_alloc(udev, ONETOUCH_PKT_LEN,
161                                           SLAB_ATOMIC, &onetouch->data_dma);
162         if (!onetouch->data)
163                 goto fail1;
164
165         onetouch->irq = usb_alloc_urb(0, GFP_KERNEL);
166         if (!onetouch->irq)
167                 goto fail2;
168
169         onetouch->udev = udev;
170         onetouch->dev = input_dev;
171
172         if (udev->manufacturer)
173                 strlcpy(onetouch->name, udev->manufacturer,
174                         sizeof(onetouch->name));
175         if (udev->product) {
176                 if (udev->manufacturer)
177                         strlcat(onetouch->name, " ", sizeof(onetouch->name));
178                 strlcat(onetouch->name, udev->product, sizeof(onetouch->name));
179         }
180
181         if (!strlen(onetouch->name))
182                 snprintf(onetouch->name, sizeof(onetouch->name),
183                          "Maxtor Onetouch %04x:%04x",
184                          le16_to_cpu(udev->descriptor.idVendor),
185                          le16_to_cpu(udev->descriptor.idProduct));
186
187         usb_make_path(udev, onetouch->phys, sizeof(onetouch->phys));
188         strlcat(onetouch->phys, "/input0", sizeof(onetouch->phys));
189
190         input_dev->name = onetouch->name;
191         input_dev->phys = onetouch->phys;
192         usb_to_input_id(udev, &input_dev->id);
193         input_dev->cdev.dev = &udev->dev;
194
195         set_bit(EV_KEY, input_dev->evbit);
196         set_bit(ONETOUCH_BUTTON, input_dev->keybit);
197         clear_bit(0, input_dev->keybit);
198
199         input_dev->private = onetouch;
200         input_dev->open = usb_onetouch_open;
201         input_dev->close = usb_onetouch_close;
202
203         usb_fill_int_urb(onetouch->irq, udev, pipe, onetouch->data,
204                          (maxp > 8 ? 8 : maxp),
205                          usb_onetouch_irq, onetouch, endpoint->bInterval);
206         onetouch->irq->transfer_dma = onetouch->data_dma;
207         onetouch->irq->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
208
209         ss->extra_destructor = onetouch_release_input;
210         ss->extra = onetouch;
211 #ifdef CONFIG_PM
212         ss->suspend_resume_hook = usb_onetouch_pm_hook;
213 #endif
214
215         error = input_register_device(onetouch->dev);
216         if (error)
217                 goto fail3;
218
219         return 0;
220
221  fail3: usb_free_urb(onetouch->irq);
222  fail2: usb_buffer_free(udev, ONETOUCH_PKT_LEN,
223                         onetouch->data, onetouch->data_dma);
224  fail1: kfree(onetouch);
225         input_free_device(input_dev);
226         return error;
227 }
228
229 void onetouch_release_input(void *onetouch_)
230 {
231         struct usb_onetouch *onetouch = (struct usb_onetouch *) onetouch_;
232
233         if (onetouch) {
234                 usb_kill_urb(onetouch->irq);
235                 input_unregister_device(onetouch->dev);
236                 usb_free_urb(onetouch->irq);
237                 usb_buffer_free(onetouch->udev, ONETOUCH_PKT_LEN,
238                                 onetouch->data, onetouch->data_dma);
239         }
240 }