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 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/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 <linux/usb_ch9.h>
  39 #include <linux/usb_input.h>
  40 #include "usb.h"
  41 #include "onetouch.h"
  42 #include "debug.h"
  43
  44 void onetouch_release_input(void *onetouch_);
  45
  46 struct usb_onetouch {
  47         char name[128];
  48         char phys[64];
  49         struct input_dev *dev;  /* input device interface */
  50         struct usb_device *udev;        /* usb device */
  51
  52         struct urb *irq;        /* urb for interrupt in report */
  53         unsigned char *data;    /* input data */
  54         dma_addr_t data_dma;
  55 };
  56
  57 static void usb_onetouch_irq(struct urb *urb, struct pt_regs *regs)
  58 {
  59         struct usb_onetouch *onetouch = urb->context;
  60         signed char *data = onetouch->data;
  61         struct input_dev *dev = onetouch->dev;
  62         int status;
  63
  64         switch (urb->status) {
  65         case 0:                 /* success */
  66                 break;
  67         case -ECONNRESET:       /* unlink */
  68         case -ENOENT:
  69         case -ESHUTDOWN:
  70                 return;
  71         /* -EPIPE:  should clear the halt */
  72         default:                /* error */
  73                 goto resubmit;
  74         }
  75
  76         input_regs(dev, regs);
  77         input_report_key(dev, ONETOUCH_BUTTON, data[0] & 0x02);
  78         input_sync(dev);
  79
  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         struct input_dev *input_dev;
 115         int pipe, maxp;
 116
 117         interface = ss->pusb_intf->cur_altsetting;
 118
 119         if (interface->desc.bNumEndpoints != 3)
 120                 return -ENODEV;
 121
 122         endpoint = &interface->endpoint[2].desc;
 123         if (!(endpoint->bEndpointAddress & USB_DIR_IN))
 124                 return -ENODEV;
 125         if ((endpoint->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK)
 126                         != USB_ENDPOINT_XFER_INT)
 127                 return -ENODEV;
 128
 129         pipe = usb_rcvintpipe(udev, endpoint->bEndpointAddress);
 130         maxp = usb_maxpacket(udev, pipe, usb_pipeout(pipe));
 131
 132         onetouch = kzalloc(sizeof(struct usb_onetouch), GFP_KERNEL);
 133         input_dev = input_allocate_device();
 134         if (!onetouch || !input_dev)
 135                 goto fail1;
 136
 137         onetouch->data = usb_buffer_alloc(udev, ONETOUCH_PKT_LEN,
 138                                           SLAB_ATOMIC, &onetouch->data_dma);
 139         if (!onetouch->data)
 140                 goto fail1;
 141
 142         onetouch->irq = usb_alloc_urb(0, GFP_KERNEL);
 143         if (!onetouch->irq)
 144                 goto fail2;
 145
 146         onetouch->udev = udev;
 147         onetouch->dev = input_dev;
 148
 149         if (udev->manufacturer)
 150                 strlcpy(onetouch->name, udev->manufacturer,
 151                         sizeof(onetouch->name));
 152         if (udev->product) {
 153                 if (udev->manufacturer)
 154                         strlcat(onetouch->name, " ", sizeof(onetouch->name));
 155                 strlcat(onetouch->name, udev->product, sizeof(onetouch->name));
 156         }
 157
 158         if (!strlen(onetouch->name))
 159                 snprintf(onetouch->name, sizeof(onetouch->name),
 160                          "Maxtor Onetouch %04x:%04x",
 161                          le16_to_cpu(udev->descriptor.idVendor),
 162                          le16_to_cpu(udev->descriptor.idProduct));
 163
 164         usb_make_path(udev, onetouch->phys, sizeof(onetouch->phys));
 165         strlcat(onetouch->phys, "/input0", sizeof(onetouch->phys));
 166
 167         input_dev->name = onetouch->name;
 168         input_dev->phys = onetouch->phys;
 169         usb_to_input_id(udev, &input_dev->id);
 170         input_dev->cdev.dev = &udev->dev;
 171
 172         set_bit(EV_KEY, input_dev->evbit);
 173         set_bit(ONETOUCH_BUTTON, input_dev->keybit);
 174         clear_bit(0, input_dev->keybit);
 175
 176         input_dev->private = onetouch;
 177         input_dev->open = usb_onetouch_open;
 178         input_dev->close = usb_onetouch_close;
 179
 180         usb_fill_int_urb(onetouch->irq, udev, pipe, onetouch->data,
 181                          (maxp > 8 ? 8 : maxp),
 182                          usb_onetouch_irq, onetouch, endpoint->bInterval);
 183         onetouch->irq->transfer_dma = onetouch->data_dma;
 184         onetouch->irq->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
 185
 186         ss->extra_destructor = onetouch_release_input;
 187         ss->extra = onetouch;
 188
 189         input_register_device(onetouch->dev);
 190
 191         return 0;
 192
 193  fail2: usb_buffer_free(udev, ONETOUCH_PKT_LEN,
 194                         onetouch->data, onetouch->data_dma);
 195  fail1: kfree(onetouch);
 196         input_free_device(input_dev);
 197         return -ENOMEM;
 198 }
 199
 200 void onetouch_release_input(void *onetouch_)
 201 {
 202         struct usb_onetouch *onetouch = (struct usb_onetouch *) onetouch_;
 203
 204         if (onetouch) {
 205                 usb_kill_urb(onetouch->irq);
 206                 input_unregister_device(onetouch->dev);
 207                 usb_free_urb(onetouch->irq);
 208                 usb_buffer_free(onetouch->udev, ONETOUCH_PKT_LEN,
 209                                 onetouch->data, onetouch->data_dma);
 210         }
 211 }