git.oblomov.eu Git - linux-2.6/blob - 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 Thyrén <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 "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 };
  54
  55 static void usb_onetouch_irq(struct urb *urb, struct pt_regs *regs)
  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_regs(dev, regs);
  75
  76         input_report_key(&onetouch->dev, ONETOUCH_BUTTON,
  77                          data[0] & 0x02);
  78
  79         input_sync(dev);
  80 resubmit:
  81         status = usb_submit_urb (urb, SLAB_ATOMIC);
  82         if (status)
  83                 err ("can't resubmit intr, %s-%s/input0, status %d",
  84                         onetouch->udev->bus->bus_name,
  85                         onetouch->udev->devpath, status);
  86 }
  87
  88 static int usb_onetouch_open(struct input_dev *dev)
  89 {
  90         struct usb_onetouch *onetouch = dev->private;
  91
  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 }
 107
 108 int onetouch_connect_input(struct us_data *ss)
 109 {
 110         struct usb_device *udev = ss->pusb_dev;
 111         struct usb_host_interface *interface;
 112         struct usb_endpoint_descriptor *endpoint;
 113         struct usb_onetouch *onetouch;
 114         int pipe, maxp;
 115         char path[64];
 116
 117         interface = ss->pusb_intf->cur_altsetting;
 118
 119         endpoint = &interface->endpoint[2].desc;
 120         if(!(endpoint->bEndpointAddress & 0x80))
 121                 return -ENODEV;
 122         if((endpoint->bmAttributes & 3) != 3)
 123                 return -ENODEV;
 124
 125         pipe = usb_rcvintpipe(udev, endpoint->bEndpointAddress);
 126         maxp = usb_maxpacket(udev, pipe, usb_pipeout(pipe));
 127
 128         if (!(onetouch = kcalloc(1, sizeof(struct usb_onetouch), GFP_KERNEL)))
 129                 return -ENOMEM;
 130
 131         onetouch->data = usb_buffer_alloc(udev, ONETOUCH_PKT_LEN, SLAB_ATOMIC, &onetouch->data_dma);
 132         if (!onetouch->data){
 133                 kfree(onetouch);
 134                 return -ENOMEM;
 135         }
 136
 137         onetouch->irq = usb_alloc_urb(0, GFP_KERNEL);
 138         if (!onetouch->irq){
 139                 kfree(onetouch);
 140                 usb_buffer_free(udev, ONETOUCH_PKT_LEN, onetouch->data, onetouch->data_dma);
 141                 return -ENODEV;
 142         }
 143
 144
 145         onetouch->udev = udev;
 146
 147         set_bit(EV_KEY, onetouch->dev.evbit);
 148         set_bit(ONETOUCH_BUTTON, onetouch->dev.keybit);
 149         clear_bit(0, onetouch->dev.keybit);
 150
 151         onetouch->dev.private = onetouch;
 152         onetouch->dev.open = usb_onetouch_open;
 153         onetouch->dev.close = usb_onetouch_close;
 154
 155         usb_make_path(udev, path, 64);
 156         sprintf(onetouch->phys, "%s/input0", path);
 157
 158         onetouch->dev.name = onetouch->name;
 159         onetouch->dev.phys = onetouch->phys;
 160
 161         onetouch->dev.id.bustype = BUS_USB;
 162         onetouch->dev.id.vendor = le16_to_cpu(udev->descriptor.idVendor);
 163         onetouch->dev.id.product = le16_to_cpu(udev->descriptor.idProduct);
 164         onetouch->dev.id.version = le16_to_cpu(udev->descriptor.bcdDevice);
 165
 166         onetouch->dev.dev = &udev->dev;
 167
 168         if (udev->manufacturer)
 169                 strcat(onetouch->name, udev->manufacturer);
 170         if (udev->product)
 171                 sprintf(onetouch->name, "%s %s", onetouch->name,
 172                         udev->product);
 173         if (!strlen(onetouch->name))
 174                 sprintf(onetouch->name, "Maxtor Onetouch %04x:%04x",
 175                         onetouch->dev.id.vendor, onetouch->dev.id.product);
 176
 177         usb_fill_int_urb(onetouch->irq, udev, pipe, onetouch->data,
 178                          (maxp > 8 ? 8 : maxp),
 179                          usb_onetouch_irq, onetouch, endpoint->bInterval);
 180         onetouch->irq->transfer_dma = onetouch->data_dma;
 181         onetouch->irq->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
 182
 183         ss->extra_destructor = onetouch_release_input;
 184         ss->extra = onetouch;
 185
 186         input_register_device(&onetouch->dev);
 187         printk(KERN_INFO "usb-input: %s on %s\n", onetouch->dev.name, path);
 188
 189         return 0;
 190 }
 191
 192 void onetouch_release_input(void *onetouch_)
 193 {
 194         struct usb_onetouch *onetouch = (struct usb_onetouch *) onetouch_;
 195
 196         if (onetouch) {
 197                 usb_kill_urb(onetouch->irq);
 198                 input_unregister_device(&onetouch->dev);
 199                 usb_free_urb(onetouch->irq);
 200                 usb_buffer_free(onetouch->udev, ONETOUCH_PKT_LEN,
 201                                 onetouch->data, onetouch->data_dma);
 202                 printk(KERN_INFO "Maxtor Onetouch %04x:%04x Deregistered\n",
 203                         onetouch->dev.id.vendor, onetouch->dev.id.product);
 204         }
 205 }