kernel/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/slab.h>
  34 #include <linux/module.h>
  35 #include <linux/usb/input.h>
  36 #include "usb.h"
  37 #include "debug.h"
  38
  39 MODULE_DESCRIPTION("Maxtor USB OneTouch hard drive button driver");
  40 MODULE_AUTHOR("Nick Sillik <n.sillik@temple.edu>");
  41 MODULE_LICENSE("GPL");
  42
  43 #define ONETOUCH_PKT_LEN        0x02
  44 #define ONETOUCH_BUTTON         KEY_PROG1
  45
  46 static int onetouch_connect_input(struct us_data *ss);
  47 static void onetouch_release_input(void *onetouch_);
  48
  49 struct usb_onetouch {
  50         char name[128];
  51         char phys[64];
  52         struct input_dev *dev;  /* input device interface */
  53         struct usb_device *udev;        /* usb device */
  54
  55         struct urb *irq;        /* urb for interrupt in report */
  56         unsigned char *data;    /* input data */
  57         dma_addr_t data_dma;
  58         unsigned int is_open:1;
  59 };
  60
  61
  62 /*
  63  * The table of devices
  64  */
  65 #define UNUSUAL_DEV(id_vendor, id_product, bcdDeviceMin, bcdDeviceMax, \
  66                     vendorName, productName, useProtocol, useTransport, \
  67                     initFunction, flags) \
  68 { USB_DEVICE_VER(id_vendor, id_product, bcdDeviceMin, bcdDeviceMax), \
  69   .driver_info = (flags) }
  70
  71 static struct usb_device_id onetouch_usb_ids[] = {
  72 #       include "unusual_onetouch.h"
  73         { }             /* Terminating entry */
  74 };
  75 MODULE_DEVICE_TABLE(usb, onetouch_usb_ids);
  76
  77 #undef UNUSUAL_DEV
  78
  79 /*
  80  * The flags table
  81  */
  82 #define UNUSUAL_DEV(idVendor, idProduct, bcdDeviceMin, bcdDeviceMax, \
  83                     vendor_name, product_name, use_protocol, use_transport, \
  84                     init_function, Flags) \
  85 { \
  86         .vendorName = vendor_name,      \
  87         .productName = product_name,    \
  88         .useProtocol = use_protocol,    \
  89         .useTransport = use_transport,  \
  90         .initFunction = init_function,  \
  91 }
  92
  93 static struct us_unusual_dev onetouch_unusual_dev_list[] = {
  94 #       include "unusual_onetouch.h"
  95         { }             /* Terminating entry */
  96 };
  97
  98 #undef UNUSUAL_DEV
  99
 100
 101 static void usb_onetouch_irq(struct urb *urb)
 102 {
 103         struct usb_onetouch *onetouch = urb->context;
 104         signed char *data = onetouch->data;
 105         struct input_dev *dev = onetouch->dev;
 106         int status = urb->status;
 107         int retval;
 108
 109         switch (status) {
 110         case 0:                 /* success */
 111                 break;
 112         case -ECONNRESET:       /* unlink */
 113         case -ENOENT:
 114         case -ESHUTDOWN:
 115                 return;
 116         /* -EPIPE:  should clear the halt */
 117         default:                /* error */
 118                 goto resubmit;
 119         }
 120
 121         input_report_key(dev, ONETOUCH_BUTTON, data[0] & 0x02);
 122         input_sync(dev);
 123
 124 resubmit:
 125         retval = usb_submit_urb (urb, GFP_ATOMIC);
 126         if (retval)
 127                 dev_err(&dev->dev, "can't resubmit intr, %s-%s/input0, "
 128                         "retval %d\n", onetouch->udev->bus->bus_name,
 129                         onetouch->udev->devpath, retval);
 130 }
 131
 132 static int usb_onetouch_open(struct input_dev *dev)
 133 {
 134         struct usb_onetouch *onetouch = input_get_drvdata(dev);
 135
 136         onetouch->is_open = 1;
 137         onetouch->irq->dev = onetouch->udev;
 138         if (usb_submit_urb(onetouch->irq, GFP_KERNEL)) {
 139                 dev_err(&dev->dev, "usb_submit_urb failed\n");
 140                 return -EIO;
 141         }
 142
 143         return 0;
 144 }
 145
 146 static void usb_onetouch_close(struct input_dev *dev)
 147 {
 148         struct usb_onetouch *onetouch = input_get_drvdata(dev);
 149
 150         usb_kill_urb(onetouch->irq);
 151         onetouch->is_open = 0;
 152 }
 153
 154 #ifdef CONFIG_PM
 155 static void usb_onetouch_pm_hook(struct us_data *us, int action)
 156 {
 157         struct usb_onetouch *onetouch = (struct usb_onetouch *) us->extra;
 158
 159         if (onetouch->is_open) {
 160                 switch (action) {
 161                 case US_SUSPEND:
 162                         usb_kill_urb(onetouch->irq);
 163                         break;
 164                 case US_RESUME:
 165                         if (usb_submit_urb(onetouch->irq, GFP_NOIO) != 0)
 166                                 dev_err(&onetouch->irq->dev->dev,
 167                                         "usb_submit_urb failed\n");
 168                         break;
 169                 default:
 170                         break;
 171                 }
 172         }
 173 }
 174 #endif /* CONFIG_PM */
 175
 176 static int onetouch_connect_input(struct us_data *ss)
 177 {
 178         struct usb_device *udev = ss->pusb_dev;
 179         struct usb_host_interface *interface;
 180         struct usb_endpoint_descriptor *endpoint;
 181         struct usb_onetouch *onetouch;
 182         struct input_dev *input_dev;
 183         int pipe, maxp;
 184         int error = -ENOMEM;
 185
 186         interface = ss->pusb_intf->cur_altsetting;
 187
 188         if (interface->desc.bNumEndpoints != 3)
 189                 return -ENODEV;
 190
 191         endpoint = &interface->endpoint[2].desc;
 192         if (!usb_endpoint_is_int_in(endpoint))
 193                 return -ENODEV;
 194
 195         pipe = usb_rcvintpipe(udev, endpoint->bEndpointAddress);
 196         maxp = usb_maxpacket(udev, pipe, usb_pipeout(pipe));
 197         maxp = min(maxp, ONETOUCH_PKT_LEN);
 198
 199         onetouch = kzalloc(sizeof(struct usb_onetouch), GFP_KERNEL);
 200         input_dev = input_allocate_device();
 201         if (!onetouch || !input_dev)
 202                 goto fail1;
 203
 204         onetouch->data = usb_alloc_coherent(udev, ONETOUCH_PKT_LEN,
 205                                             GFP_KERNEL, &onetouch->data_dma);
 206         if (!onetouch->data)
 207                 goto fail1;
 208
 209         onetouch->irq = usb_alloc_urb(0, GFP_KERNEL);
 210         if (!onetouch->irq)
 211                 goto fail2;
 212
 213         onetouch->udev = udev;
 214         onetouch->dev = input_dev;
 215
 216         if (udev->manufacturer)
 217                 strlcpy(onetouch->name, udev->manufacturer,
 218                         sizeof(onetouch->name));
 219         if (udev->product) {
 220                 if (udev->manufacturer)
 221                         strlcat(onetouch->name, " ", sizeof(onetouch->name));
 222                 strlcat(onetouch->name, udev->product, sizeof(onetouch->name));
 223         }
 224
 225         if (!strlen(onetouch->name))
 226                 snprintf(onetouch->name, sizeof(onetouch->name),
 227                          "Maxtor Onetouch %04x:%04x",
 228                          le16_to_cpu(udev->descriptor.idVendor),
 229                          le16_to_cpu(udev->descriptor.idProduct));
 230
 231         usb_make_path(udev, onetouch->phys, sizeof(onetouch->phys));
 232         strlcat(onetouch->phys, "/input0", sizeof(onetouch->phys));
 233
 234         input_dev->name = onetouch->name;
 235         input_dev->phys = onetouch->phys;
 236         usb_to_input_id(udev, &input_dev->id);
 237         input_dev->dev.parent = &udev->dev;
 238
 239         set_bit(EV_KEY, input_dev->evbit);
 240         set_bit(ONETOUCH_BUTTON, input_dev->keybit);
 241         clear_bit(0, input_dev->keybit);
 242
 243         input_set_drvdata(input_dev, onetouch);
 244
 245         input_dev->open = usb_onetouch_open;
 246         input_dev->close = usb_onetouch_close;
 247
 248         usb_fill_int_urb(onetouch->irq, udev, pipe, onetouch->data, maxp,
 249                          usb_onetouch_irq, onetouch, endpoint->bInterval);
 250         onetouch->irq->transfer_dma = onetouch->data_dma;
 251         onetouch->irq->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
 252
 253         ss->extra_destructor = onetouch_release_input;
 254         ss->extra = onetouch;
 255 #ifdef CONFIG_PM
 256         ss->suspend_resume_hook = usb_onetouch_pm_hook;
 257 #endif
 258
 259         error = input_register_device(onetouch->dev);
 260         if (error)
 261                 goto fail3;
 262
 263         return 0;
 264
 265  fail3: usb_free_urb(onetouch->irq);
 266  fail2: usb_free_coherent(udev, ONETOUCH_PKT_LEN,
 267                           onetouch->data, onetouch->data_dma);
 268  fail1: kfree(onetouch);
 269         input_free_device(input_dev);
 270         return error;
 271 }
 272
 273 static void onetouch_release_input(void *onetouch_)
 274 {
 275         struct usb_onetouch *onetouch = (struct usb_onetouch *) onetouch_;
 276
 277         if (onetouch) {
 278                 usb_kill_urb(onetouch->irq);
 279                 input_unregister_device(onetouch->dev);
 280                 usb_free_urb(onetouch->irq);
 281                 usb_free_coherent(onetouch->udev, ONETOUCH_PKT_LEN,
 282                                   onetouch->data, onetouch->data_dma);
 283         }
 284 }
 285
 286 static int onetouch_probe(struct usb_interface *intf,
 287                          const struct usb_device_id *id)
 288 {
 289         struct us_data *us;
 290         int result;
 291
 292         result = usb_stor_probe1(&us, intf, id,
 293                         (id - onetouch_usb_ids) + onetouch_unusual_dev_list);
 294         if (result)
 295                 return result;
 296
 297         /* Use default transport and protocol */
 298
 299         result = usb_stor_probe2(us);
 300         return result;
 301 }
 302
 303 static struct usb_driver onetouch_driver = {
 304         .name =         "ums-onetouch",
 305         .probe =        onetouch_probe,
 306         .disconnect =   usb_stor_disconnect,
 307         .suspend =      usb_stor_suspend,
 308         .resume =       usb_stor_resume,
 309         .reset_resume = usb_stor_reset_resume,
 310         .pre_reset =    usb_stor_pre_reset,
 311         .post_reset =   usb_stor_post_reset,
 312         .id_table =     onetouch_usb_ids,
 313         .soft_unbind =  1,
 314         .no_dynamic_id = 1,
 315 };
 316
 317 module_usb_driver(onetouch_driver);