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 "debug.h"
  39
  40 MODULE_DESCRIPTION("Maxtor USB OneTouch hard drive button driver");
  41 MODULE_AUTHOR("Nick Sillik <n.sillik@temple.edu>");
  42 MODULE_LICENSE("GPL");
  43
  44 #define ONETOUCH_PKT_LEN        0x02
  45 #define ONETOUCH_BUTTON         KEY_PROG1
  46
  47 static int onetouch_connect_input(struct us_data *ss);
  48 static void onetouch_release_input(void *onetouch_);
  49
  50 struct usb_onetouch {
  51         char name[128];
  52         char phys[64];
  53         struct input_dev *dev;  /* input device interface */
  54         struct usb_device *udev;        /* usb device */
  55
  56         struct urb *irq;        /* urb for interrupt in report */
  57         unsigned char *data;    /* input data */
  58         dma_addr_t data_dma;
  59         unsigned int is_open:1;
  60 };
  61
  62
  63 /*
  64  * The table of devices
  65  */
  66 #define UNUSUAL_DEV(id_vendor, id_product, bcdDeviceMin, bcdDeviceMax, \
  67                     vendorName, productName, useProtocol, useTransport, \
  68                     initFunction, flags) \
  69 { USB_DEVICE_VER(id_vendor, id_product, bcdDeviceMin, bcdDeviceMax), \
  70   .driver_info = (flags)|(USB_US_TYPE_STOR<<24) }
  71
  72 struct usb_device_id onetouch_usb_ids[] = {
  73 #       include "unusual_onetouch.h"
  74         { }             /* Terminating entry */
  75 };
  76 MODULE_DEVICE_TABLE(usb, onetouch_usb_ids);
  77
  78 #undef UNUSUAL_DEV
  79
  80 /*
  81  * The flags table
  82  */
  83 #define UNUSUAL_DEV(idVendor, idProduct, bcdDeviceMin, bcdDeviceMax, \
  84                     vendor_name, product_name, use_protocol, use_transport, \
  85                     init_function, Flags) \
  86 { \
  87         .vendorName = vendor_name,      \
  88         .productName = product_name,    \
  89         .useProtocol = use_protocol,    \
  90         .useTransport = use_transport,  \
  91         .initFunction = init_function,  \
  92 }
  93
  94 static struct us_unusual_dev onetouch_unusual_dev_list[] = {
  95 #       include "unusual_onetouch.h"
  96         { }             /* Terminating entry */
  97 };
  98
  99 #undef UNUSUAL_DEV
 100
 101
 102 static void usb_onetouch_irq(struct urb *urb)
 103 {
 104         struct usb_onetouch *onetouch = urb->context;
 105         signed char *data = onetouch->data;
 106         struct input_dev *dev = onetouch->dev;
 107         int status = urb->status;
 108         int retval;
 109
 110         switch (status) {
 111         case 0:                 /* success */
 112                 break;
 113         case -ECONNRESET:       /* unlink */
 114         case -ENOENT:
 115         case -ESHUTDOWN:
 116                 return;
 117         /* -EPIPE:  should clear the halt */
 118         default:                /* error */
 119                 goto resubmit;
 120         }
 121
 122         input_report_key(dev, ONETOUCH_BUTTON, data[0] & 0x02);
 123         input_sync(dev);
 124
 125 resubmit:
 126         retval = usb_submit_urb (urb, GFP_ATOMIC);
 127         if (retval)
 128                 dev_err(&dev->dev, "can't resubmit intr, %s-%s/input0, "
 129                         "retval %d\n", onetouch->udev->bus->bus_name,
 130                         onetouch->udev->devpath, retval);
 131 }
 132
 133 static int usb_onetouch_open(struct input_dev *dev)
 134 {
 135         struct usb_onetouch *onetouch = input_get_drvdata(dev);
 136
 137         onetouch->is_open = 1;
 138         onetouch->irq->dev = onetouch->udev;
 139         if (usb_submit_urb(onetouch->irq, GFP_KERNEL)) {
 140                 dev_err(&dev->dev, "usb_submit_urb failed\n");
 141                 return -EIO;
 142         }
 143
 144         return 0;
 145 }
 146
 147 static void usb_onetouch_close(struct input_dev *dev)
 148 {
 149         struct usb_onetouch *onetouch = input_get_drvdata(dev);
 150
 151         usb_kill_urb(onetouch->irq);
 152         onetouch->is_open = 0;
 153 }
 154
 155 #ifdef CONFIG_PM
 156 static void usb_onetouch_pm_hook(struct us_data *us, int action)
 157 {
 158         struct usb_onetouch *onetouch = (struct usb_onetouch *) us->extra;
 159
 160         if (onetouch->is_open) {
 161                 switch (action) {
 162                 case US_SUSPEND:
 163                         usb_kill_urb(onetouch->irq);
 164                         break;
 165                 case US_RESUME:
 166                         if (usb_submit_urb(onetouch->irq, GFP_NOIO) != 0)
 167                                 dev_err(&onetouch->irq->dev->dev,
 168                                         "usb_submit_urb failed\n");
 169                         break;
 170                 default:
 171                         break;
 172                 }
 173         }
 174 }
 175 #endif /* CONFIG_PM */
 176
 177 static int onetouch_connect_input(struct us_data *ss)
 178 {
 179         struct usb_device *udev = ss->pusb_dev;
 180         struct usb_host_interface *interface;
 181         struct usb_endpoint_descriptor *endpoint;
 182         struct usb_onetouch *onetouch;
 183         struct input_dev *input_dev;
 184         int pipe, maxp;
 185         int error = -ENOMEM;
 186
 187         interface = ss->pusb_intf->cur_altsetting;
 188
 189         if (interface->desc.bNumEndpoints != 3)
 190                 return -ENODEV;
 191
 192         endpoint = &interface->endpoint[2].desc;
 193         if (!usb_endpoint_is_int_in(endpoint))
 194                 return -ENODEV;
 195
 196         pipe = usb_rcvintpipe(udev, endpoint->bEndpointAddress);
 197         maxp = usb_maxpacket(udev, pipe, usb_pipeout(pipe));
 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_buffer_alloc(udev, ONETOUCH_PKT_LEN,
 205                                           GFP_ATOMIC, &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,
 249                          (maxp > 8 ? 8 : maxp),
 250                          usb_onetouch_irq, onetouch, endpoint->bInterval);
 251         onetouch->irq->transfer_dma = onetouch->data_dma;
 252         onetouch->irq->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
 253
 254         ss->extra_destructor = onetouch_release_input;
 255         ss->extra = onetouch;
 256 #ifdef CONFIG_PM
 257         ss->suspend_resume_hook = usb_onetouch_pm_hook;
 258 #endif
 259
 260         error = input_register_device(onetouch->dev);
 261         if (error)
 262                 goto fail3;
 263
 264         return 0;
 265
 266  fail3: usb_free_urb(onetouch->irq);
 267  fail2: usb_buffer_free(udev, ONETOUCH_PKT_LEN,
 268                         onetouch->data, onetouch->data_dma);
 269  fail1: kfree(onetouch);
 270         input_free_device(input_dev);
 271         return error;
 272 }
 273
 274 static void onetouch_release_input(void *onetouch_)
 275 {
 276         struct usb_onetouch *onetouch = (struct usb_onetouch *) onetouch_;
 277
 278         if (onetouch) {
 279                 usb_kill_urb(onetouch->irq);
 280                 input_unregister_device(onetouch->dev);
 281                 usb_free_urb(onetouch->irq);
 282                 usb_buffer_free(onetouch->udev, ONETOUCH_PKT_LEN,
 283                                 onetouch->data, onetouch->data_dma);
 284         }
 285 }
 286
 287 static int onetouch_probe(struct usb_interface *intf,
 288                          const struct usb_device_id *id)
 289 {
 290         struct us_data *us;
 291         int result;
 292
 293         result = usb_stor_probe1(&us, intf, id,
 294                         (id - onetouch_usb_ids) + onetouch_unusual_dev_list);
 295         if (result)
 296                 return result;
 297
 298         /* Use default transport and protocol */
 299
 300         result = usb_stor_probe2(us);
 301         return result;
 302 }
 303
 304 static struct usb_driver onetouch_driver = {
 305         .name =         "ums-onetouch",
 306         .probe =        onetouch_probe,
 307         .disconnect =   usb_stor_disconnect,
 308         .suspend =      usb_stor_suspend,
 309         .resume =       usb_stor_resume,
 310         .reset_resume = usb_stor_reset_resume,
 311         .pre_reset =    usb_stor_pre_reset,
 312         .post_reset =   usb_stor_post_reset,
 313         .id_table =     onetouch_usb_ids,
 314         .soft_unbind =  1,
 315 };
 316
 317 static int __init onetouch_init(void)
 318 {
 319         return usb_register(&onetouch_driver);
 320 }
 321
 322 static void __exit onetouch_exit(void)
 323 {
 324         usb_deregister(&onetouch_driver);
 325 }
 326
 327 module_init(onetouch_init);
 328 module_exit(onetouch_exit);