drivers/input/tablet/acecad.c

   1 /*
   2  *  Copyright (c) 2001-2005 Edouard TISSERANT   <edouard.tisserant@wanadoo.fr>
   3  *  Copyright (c) 2004-2005 Stephane VOLTZ      <svoltz@numericable.fr>
   4  *
   5  *  USB Acecad "Acecad Flair" tablet support
   6  *
   7  *  Changelog:
   8  *      v3.2 - Added sysfs support
   9  */
  10
  11 /*
  12  * This program is free software; you can redistribute it and/or modify
  13  * it under the terms of the GNU General Public License as published by
  14  * the Free Software Foundation; either version 2 of the License, or
  15  * (at your option) any later version.
  16  *
  17  * This program is distributed in the hope that it will be useful,
  18  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  19  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  20  * GNU General Public License for more details.
  21  *
  22  * You should have received a copy of the GNU General Public License
  23  * along with this program; if not, write to the Free Software
  24  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  25  *
  26  */
  27
  28 #include <linux/kernel.h>
  29 #include <linux/slab.h>
  30 #include <linux/module.h>
  31 #include <linux/usb/input.h>
  32
  33 MODULE_AUTHOR("Edouard TISSERANT <edouard.tisserant@wanadoo.fr>");
  34 MODULE_DESCRIPTION("USB Acecad Flair tablet driver");
  35 MODULE_LICENSE("GPL");
  36
  37 #define USB_VENDOR_ID_ACECAD    0x0460
  38 #define USB_DEVICE_ID_FLAIR     0x0004
  39 #define USB_DEVICE_ID_302       0x0008
  40
  41 struct usb_acecad {
  42         char name[128];
  43         char phys[64];
  44         struct usb_interface *intf;
  45         struct input_dev *input;
  46         struct urb *irq;
  47
  48         unsigned char *data;
  49         dma_addr_t data_dma;
  50 };
  51
  52 static void usb_acecad_irq(struct urb *urb)
  53 {
  54         struct usb_acecad *acecad = urb->context;
  55         unsigned char *data = acecad->data;
  56         struct input_dev *dev = acecad->input;
  57         struct usb_interface *intf = acecad->intf;
  58         struct usb_device *udev = interface_to_usbdev(intf);
  59         int prox, status;
  60
  61         switch (urb->status) {
  62         case 0:
  63                 /* success */
  64                 break;
  65         case -ECONNRESET:
  66         case -ENOENT:
  67         case -ESHUTDOWN:
  68                 /* this urb is terminated, clean up */
  69                 dev_dbg(&intf->dev, "%s - urb shutting down with status: %d\n",
  70                         __func__, urb->status);
  71                 return;
  72         default:
  73                 dev_dbg(&intf->dev, "%s - nonzero urb status received: %d\n",
  74                         __func__, urb->status);
  75                 goto resubmit;
  76         }
  77
  78         prox = (data[0] & 0x04) >> 2;
  79         input_report_key(dev, BTN_TOOL_PEN, prox);
  80
  81         if (prox) {
  82                 int x = data[1] | (data[2] << 8);
  83                 int y = data[3] | (data[4] << 8);
  84                 /* Pressure should compute the same way for flair and 302 */
  85                 int pressure = data[5] | (data[6] << 8);
  86                 int touch = data[0] & 0x01;
  87                 int stylus = (data[0] & 0x10) >> 4;
  88                 int stylus2 = (data[0] & 0x20) >> 5;
  89                 input_report_abs(dev, ABS_X, x);
  90                 input_report_abs(dev, ABS_Y, y);
  91                 input_report_abs(dev, ABS_PRESSURE, pressure);
  92                 input_report_key(dev, BTN_TOUCH, touch);
  93                 input_report_key(dev, BTN_STYLUS, stylus);
  94                 input_report_key(dev, BTN_STYLUS2, stylus2);
  95         }
  96
  97         /* event termination */
  98         input_sync(dev);
  99
 100 resubmit:
 101         status = usb_submit_urb(urb, GFP_ATOMIC);
 102         if (status)
 103                 dev_err(&intf->dev,
 104                         "can't resubmit intr, %s-%s/input0, status %d\n",
 105                         udev->bus->bus_name,
 106                         udev->devpath, status);
 107 }
 108
 109 static int usb_acecad_open(struct input_dev *dev)
 110 {
 111         struct usb_acecad *acecad = input_get_drvdata(dev);
 112
 113         acecad->irq->dev = interface_to_usbdev(acecad->intf);
 114         if (usb_submit_urb(acecad->irq, GFP_KERNEL))
 115                 return -EIO;
 116
 117         return 0;
 118 }
 119
 120 static void usb_acecad_close(struct input_dev *dev)
 121 {
 122         struct usb_acecad *acecad = input_get_drvdata(dev);
 123
 124         usb_kill_urb(acecad->irq);
 125 }
 126
 127 static int usb_acecad_probe(struct usb_interface *intf, const struct usb_device_id *id)
 128 {
 129         struct usb_device *dev = interface_to_usbdev(intf);
 130         struct usb_host_interface *interface = intf->cur_altsetting;
 131         struct usb_endpoint_descriptor *endpoint;
 132         struct usb_acecad *acecad;
 133         struct input_dev *input_dev;
 134         int pipe, maxp;
 135         int err;
 136
 137         if (interface->desc.bNumEndpoints != 1)
 138                 return -ENODEV;
 139
 140         endpoint = &interface->endpoint[0].desc;
 141
 142         if (!usb_endpoint_is_int_in(endpoint))
 143                 return -ENODEV;
 144
 145         pipe = usb_rcvintpipe(dev, endpoint->bEndpointAddress);
 146         maxp = usb_maxpacket(dev, pipe, usb_pipeout(pipe));
 147
 148         acecad = kzalloc(sizeof(struct usb_acecad), GFP_KERNEL);
 149         input_dev = input_allocate_device();
 150         if (!acecad || !input_dev) {
 151                 err = -ENOMEM;
 152                 goto fail1;
 153         }
 154
 155         acecad->data = usb_alloc_coherent(dev, 8, GFP_KERNEL, &acecad->data_dma);
 156         if (!acecad->data) {
 157                 err= -ENOMEM;
 158                 goto fail1;
 159         }
 160
 161         acecad->irq = usb_alloc_urb(0, GFP_KERNEL);
 162         if (!acecad->irq) {
 163                 err = -ENOMEM;
 164                 goto fail2;
 165         }
 166
 167         acecad->intf = intf;
 168         acecad->input = input_dev;
 169
 170         if (dev->manufacturer)
 171                 strlcpy(acecad->name, dev->manufacturer, sizeof(acecad->name));
 172
 173         if (dev->product) {
 174                 if (dev->manufacturer)
 175                         strlcat(acecad->name, " ", sizeof(acecad->name));
 176                 strlcat(acecad->name, dev->product, sizeof(acecad->name));
 177         }
 178
 179         usb_make_path(dev, acecad->phys, sizeof(acecad->phys));
 180         strlcat(acecad->phys, "/input0", sizeof(acecad->phys));
 181
 182         input_dev->name = acecad->name;
 183         input_dev->phys = acecad->phys;
 184         usb_to_input_id(dev, &input_dev->id);
 185         input_dev->dev.parent = &intf->dev;
 186
 187         input_set_drvdata(input_dev, acecad);
 188
 189         input_dev->open = usb_acecad_open;
 190         input_dev->close = usb_acecad_close;
 191
 192         input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);
 193         input_dev->keybit[BIT_WORD(BTN_DIGI)] = BIT_MASK(BTN_TOOL_PEN) |
 194                 BIT_MASK(BTN_TOUCH) | BIT_MASK(BTN_STYLUS) |
 195                 BIT_MASK(BTN_STYLUS2);
 196
 197         switch (id->driver_info) {
 198         case 0:
 199                 input_set_abs_params(input_dev, ABS_X, 0, 5000, 4, 0);
 200                 input_set_abs_params(input_dev, ABS_Y, 0, 3750, 4, 0);
 201                 input_set_abs_params(input_dev, ABS_PRESSURE, 0, 512, 0, 0);
 202                 if (!strlen(acecad->name))
 203                         snprintf(acecad->name, sizeof(acecad->name),
 204                                 "USB Acecad Flair Tablet %04x:%04x",
 205                                 le16_to_cpu(dev->descriptor.idVendor),
 206                                 le16_to_cpu(dev->descriptor.idProduct));
 207                 break;
 208
 209         case 1:
 210                 input_set_abs_params(input_dev, ABS_X, 0, 53000, 4, 0);
 211                 input_set_abs_params(input_dev, ABS_Y, 0, 2250, 4, 0);
 212                 input_set_abs_params(input_dev, ABS_PRESSURE, 0, 1024, 0, 0);
 213                 if (!strlen(acecad->name))
 214                         snprintf(acecad->name, sizeof(acecad->name),
 215                                 "USB Acecad 302 Tablet %04x:%04x",
 216                                 le16_to_cpu(dev->descriptor.idVendor),
 217                                 le16_to_cpu(dev->descriptor.idProduct));
 218                 break;
 219         }
 220
 221         usb_fill_int_urb(acecad->irq, dev, pipe,
 222                         acecad->data, maxp > 8 ? 8 : maxp,
 223                         usb_acecad_irq, acecad, endpoint->bInterval);
 224         acecad->irq->transfer_dma = acecad->data_dma;
 225         acecad->irq->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
 226
 227         err = input_register_device(acecad->input);
 228         if (err)
 229                 goto fail3;
 230
 231         usb_set_intfdata(intf, acecad);
 232
 233         return 0;
 234
 235  fail3: usb_free_urb(acecad->irq);
 236  fail2: usb_free_coherent(dev, 8, acecad->data, acecad->data_dma);
 237  fail1: input_free_device(input_dev);
 238         kfree(acecad);
 239         return err;
 240 }
 241
 242 static void usb_acecad_disconnect(struct usb_interface *intf)
 243 {
 244         struct usb_acecad *acecad = usb_get_intfdata(intf);
 245         struct usb_device *udev = interface_to_usbdev(intf);
 246
 247         usb_set_intfdata(intf, NULL);
 248
 249         input_unregister_device(acecad->input);
 250         usb_free_urb(acecad->irq);
 251         usb_free_coherent(udev, 8, acecad->data, acecad->data_dma);
 252         kfree(acecad);
 253 }
 254
 255 static const struct usb_device_id usb_acecad_id_table[] = {
 256         { USB_DEVICE(USB_VENDOR_ID_ACECAD, USB_DEVICE_ID_FLAIR), .driver_info = 0 },
 257         { USB_DEVICE(USB_VENDOR_ID_ACECAD, USB_DEVICE_ID_302),   .driver_info = 1 },
 258         { }
 259 };
 260
 261 MODULE_DEVICE_TABLE(usb, usb_acecad_id_table);
 262
 263 static struct usb_driver usb_acecad_driver = {
 264         .name =         "usb_acecad",
 265         .probe =        usb_acecad_probe,
 266         .disconnect =   usb_acecad_disconnect,
 267         .id_table =     usb_acecad_id_table,
 268 };
 269
 270 module_usb_driver(usb_acecad_driver);