drivers/usb/storage/onetouch.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * Support for the Maxtor OneTouch USB hard drive's button
   4  *
   5  * Current development and maintenance by:
   6  *      Copyright (c) 2005 Nick Sillik <n.sillik@temple.edu>
   7  *
   8  * Initial work by:
   9  *      Copyright (c) 2003 Erik Thyren <erth7411@student.uu.se>
  10  *
  11  * Based on usbmouse.c (Vojtech Pavlik) and xpad.c (Marko Friedemann)
  12  *
  13  */
  14 #include <linux/kernel.h>
  15 #include <linux/input.h>
  16 #include <linux/slab.h>
  17 #include <linux/module.h>
  18 #include <linux/usb/input.h>
  19 #include "usb.h"
  20 #include "debug.h"
  21 #include "scsiglue.h"
  22
  23 #define DRV_NAME "ums-onetouch"
  24
  25 MODULE_DESCRIPTION("Maxtor USB OneTouch hard drive button driver");
  26 MODULE_AUTHOR("Nick Sillik <n.sillik@temple.edu>");
  27 MODULE_LICENSE("GPL");
  28
  29 #define ONETOUCH_PKT_LEN        0x02
  30 #define ONETOUCH_BUTTON         KEY_PROG1
  31
  32 static int onetouch_connect_input(struct us_data *ss);
  33 static void onetouch_release_input(void *onetouch_);
  34
  35 struct usb_onetouch {
  36         char name[128];
  37         char phys[64];
  38         struct input_dev *dev;  /* input device interface */
  39         struct usb_device *udev;        /* usb device */
  40
  41         struct urb *irq;        /* urb for interrupt in report */
  42         unsigned char *data;    /* input data */
  43         dma_addr_t data_dma;
  44         unsigned int is_open:1;
  45 };
  46
  47
  48 /*
  49  * The table of devices
  50  */
  51 #define UNUSUAL_DEV(id_vendor, id_product, bcdDeviceMin, bcdDeviceMax, \
  52                     vendorName, productName, useProtocol, useTransport, \
  53                     initFunction, flags) \
  54 { USB_DEVICE_VER(id_vendor, id_product, bcdDeviceMin, bcdDeviceMax), \
  55   .driver_info = (flags) }
  56
  57 static struct usb_device_id onetouch_usb_ids[] = {
  58 #       include "unusual_onetouch.h"
  59         { }             /* Terminating entry */
  60 };
  61 MODULE_DEVICE_TABLE(usb, onetouch_usb_ids);
  62
  63 #undef UNUSUAL_DEV
  64
  65 /*
  66  * The flags table
  67  */
  68 #define UNUSUAL_DEV(idVendor, idProduct, bcdDeviceMin, bcdDeviceMax, \
  69                     vendor_name, product_name, use_protocol, use_transport, \
  70                     init_function, Flags) \
  71 { \
  72         .vendorName = vendor_name,      \
  73         .productName = product_name,    \
  74         .useProtocol = use_protocol,    \
  75         .useTransport = use_transport,  \
  76         .initFunction = init_function,  \
  77 }
  78
  79 static struct us_unusual_dev onetouch_unusual_dev_list[] = {
  80 #       include "unusual_onetouch.h"
  81         { }             /* Terminating entry */
  82 };
  83
  84 #undef UNUSUAL_DEV
  85
  86
  87 static void usb_onetouch_irq(struct urb *urb)
  88 {
  89         struct usb_onetouch *onetouch = urb->context;
  90         signed char *data = onetouch->data;
  91         struct input_dev *dev = onetouch->dev;
  92         int status = urb->status;
  93         int retval;
  94
  95         switch (status) {
  96         case 0:                 /* success */
  97                 break;
  98         case -ECONNRESET:       /* unlink */
  99         case -ENOENT:
 100         case -ESHUTDOWN:
 101                 return;
 102         /* -EPIPE:  should clear the halt */
 103         default:                /* error */
 104                 goto resubmit;
 105         }
 106
 107         input_report_key(dev, ONETOUCH_BUTTON, data[0] & 0x02);
 108         input_sync(dev);
 109
 110 resubmit:
 111         retval = usb_submit_urb (urb, GFP_ATOMIC);
 112         if (retval)
 113                 dev_err(&dev->dev, "can't resubmit intr, %s-%s/input0, "
 114                         "retval %d\n", onetouch->udev->bus->bus_name,
 115                         onetouch->udev->devpath, retval);
 116 }
 117
 118 static int usb_onetouch_open(struct input_dev *dev)
 119 {
 120         struct usb_onetouch *onetouch = input_get_drvdata(dev);
 121
 122         onetouch->is_open = 1;
 123         onetouch->irq->dev = onetouch->udev;
 124         if (usb_submit_urb(onetouch->irq, GFP_KERNEL)) {
 125                 dev_err(&dev->dev, "usb_submit_urb failed\n");
 126                 return -EIO;
 127         }
 128
 129         return 0;
 130 }
 131
 132 static void usb_onetouch_close(struct input_dev *dev)
 133 {
 134         struct usb_onetouch *onetouch = input_get_drvdata(dev);
 135
 136         usb_kill_urb(onetouch->irq);
 137         onetouch->is_open = 0;
 138 }
 139
 140 #ifdef CONFIG_PM
 141 static void usb_onetouch_pm_hook(struct us_data *us, int action)
 142 {
 143         struct usb_onetouch *onetouch = (struct usb_onetouch *) us->extra;
 144
 145         if (onetouch->is_open) {
 146                 switch (action) {
 147                 case US_SUSPEND:
 148                         usb_kill_urb(onetouch->irq);
 149                         break;
 150                 case US_RESUME:
 151                         if (usb_submit_urb(onetouch->irq, GFP_NOIO) != 0)
 152                                 dev_err(&onetouch->irq->dev->dev,
 153                                         "usb_submit_urb failed\n");
 154                         break;
 155                 default:
 156                         break;
 157                 }
 158         }
 159 }
 160 #endif /* CONFIG_PM */
 161
 162 static int onetouch_connect_input(struct us_data *ss)
 163 {
 164         struct usb_device *udev = ss->pusb_dev;
 165         struct usb_host_interface *interface;
 166         struct usb_endpoint_descriptor *endpoint;
 167         struct usb_onetouch *onetouch;
 168         struct input_dev *input_dev;
 169         int pipe, maxp;
 170         int error = -ENOMEM;
 171
 172         interface = ss->pusb_intf->cur_altsetting;
 173
 174         if (interface->desc.bNumEndpoints != 3)
 175                 return -ENODEV;
 176
 177         endpoint = &interface->endpoint[2].desc;
 178         if (!usb_endpoint_is_int_in(endpoint))
 179                 return -ENODEV;
 180
 181         pipe = usb_rcvintpipe(udev, endpoint->bEndpointAddress);
 182         maxp = usb_maxpacket(udev, pipe, usb_pipeout(pipe));
 183         maxp = min(maxp, ONETOUCH_PKT_LEN);
 184
 185         onetouch = kzalloc(sizeof(struct usb_onetouch), GFP_KERNEL);
 186         input_dev = input_allocate_device();
 187         if (!onetouch || !input_dev)
 188                 goto fail1;
 189
 190         onetouch->data = usb_alloc_coherent(udev, ONETOUCH_PKT_LEN,
 191                                             GFP_KERNEL, &onetouch->data_dma);
 192         if (!onetouch->data)
 193                 goto fail1;
 194
 195         onetouch->irq = usb_alloc_urb(0, GFP_KERNEL);
 196         if (!onetouch->irq)
 197                 goto fail2;
 198
 199         onetouch->udev = udev;
 200         onetouch->dev = input_dev;
 201
 202         if (udev->manufacturer)
 203                 strlcpy(onetouch->name, udev->manufacturer,
 204                         sizeof(onetouch->name));
 205         if (udev->product) {
 206                 if (udev->manufacturer)
 207                         strlcat(onetouch->name, " ", sizeof(onetouch->name));
 208                 strlcat(onetouch->name, udev->product, sizeof(onetouch->name));
 209         }
 210
 211         if (!strlen(onetouch->name))
 212                 snprintf(onetouch->name, sizeof(onetouch->name),
 213                          "Maxtor Onetouch %04x:%04x",
 214                          le16_to_cpu(udev->descriptor.idVendor),
 215                          le16_to_cpu(udev->descriptor.idProduct));
 216
 217         usb_make_path(udev, onetouch->phys, sizeof(onetouch->phys));
 218         strlcat(onetouch->phys, "/input0", sizeof(onetouch->phys));
 219
 220         input_dev->name = onetouch->name;
 221         input_dev->phys = onetouch->phys;
 222         usb_to_input_id(udev, &input_dev->id);
 223         input_dev->dev.parent = &udev->dev;
 224
 225         set_bit(EV_KEY, input_dev->evbit);
 226         set_bit(ONETOUCH_BUTTON, input_dev->keybit);
 227         clear_bit(0, input_dev->keybit);
 228
 229         input_set_drvdata(input_dev, onetouch);
 230
 231         input_dev->open = usb_onetouch_open;
 232         input_dev->close = usb_onetouch_close;
 233
 234         usb_fill_int_urb(onetouch->irq, udev, pipe, onetouch->data, maxp,
 235                          usb_onetouch_irq, onetouch, endpoint->bInterval);
 236         onetouch->irq->transfer_dma = onetouch->data_dma;
 237         onetouch->irq->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
 238
 239         ss->extra_destructor = onetouch_release_input;
 240         ss->extra = onetouch;
 241 #ifdef CONFIG_PM
 242         ss->suspend_resume_hook = usb_onetouch_pm_hook;
 243 #endif
 244
 245         error = input_register_device(onetouch->dev);
 246         if (error)
 247                 goto fail3;
 248
 249         return 0;
 250
 251  fail3: usb_free_urb(onetouch->irq);
 252  fail2: usb_free_coherent(udev, ONETOUCH_PKT_LEN,
 253                           onetouch->data, onetouch->data_dma);
 254  fail1: kfree(onetouch);
 255         input_free_device(input_dev);
 256         return error;
 257 }
 258
 259 static void onetouch_release_input(void *onetouch_)
 260 {
 261         struct usb_onetouch *onetouch = (struct usb_onetouch *) onetouch_;
 262
 263         if (onetouch) {
 264                 usb_kill_urb(onetouch->irq);
 265                 input_unregister_device(onetouch->dev);
 266                 usb_free_urb(onetouch->irq);
 267                 usb_free_coherent(onetouch->udev, ONETOUCH_PKT_LEN,
 268                                   onetouch->data, onetouch->data_dma);
 269         }
 270 }
 271
 272 static struct scsi_host_template onetouch_host_template;
 273
 274 static int onetouch_probe(struct usb_interface *intf,
 275                          const struct usb_device_id *id)
 276 {
 277         struct us_data *us;
 278         int result;
 279
 280         result = usb_stor_probe1(&us, intf, id,
 281                         (id - onetouch_usb_ids) + onetouch_unusual_dev_list,
 282                         &onetouch_host_template);
 283         if (result)
 284                 return result;
 285
 286         /* Use default transport and protocol */
 287
 288         result = usb_stor_probe2(us);
 289         return result;
 290 }
 291
 292 static struct usb_driver onetouch_driver = {
 293         .name =         DRV_NAME,
 294         .probe =        onetouch_probe,
 295         .disconnect =   usb_stor_disconnect,
 296         .suspend =      usb_stor_suspend,
 297         .resume =       usb_stor_resume,
 298         .reset_resume = usb_stor_reset_resume,
 299         .pre_reset =    usb_stor_pre_reset,
 300         .post_reset =   usb_stor_post_reset,
 301         .id_table =     onetouch_usb_ids,
 302         .soft_unbind =  1,
 303         .no_dynamic_id = 1,
 304 };
 305
 306 module_usb_stor_driver(onetouch_driver, onetouch_host_template, DRV_NAME);