drivers/input/tablet/acecad.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  *  Copyright (c) 2001-2005 Edouard TISSERANT   <edouard.tisserant@wanadoo.fr>
   4  *  Copyright (c) 2004-2005 Stephane VOLTZ      <svoltz@numericable.fr>
   5  *
   6  *  USB Acecad "Acecad Flair" tablet support
   7  *
   8  *  Changelog:
   9  *      v3.2 - Added sysfs support
  10  */
  11
  12 /*
  13  */
  14
  15 #include <linux/kernel.h>
  16 #include <linux/slab.h>
  17 #include <linux/module.h>
  18 #include <linux/usb/input.h>
  19
  20 MODULE_AUTHOR("Edouard TISSERANT <edouard.tisserant@wanadoo.fr>");
  21 MODULE_DESCRIPTION("USB Acecad Flair tablet driver");
  22 MODULE_LICENSE("GPL");
  23
  24 #define USB_VENDOR_ID_ACECAD    0x0460
  25 #define USB_DEVICE_ID_FLAIR     0x0004
  26 #define USB_DEVICE_ID_302       0x0008
  27
  28 struct usb_acecad {
  29         char name[128];
  30         char phys[64];
  31         struct usb_interface *intf;
  32         struct input_dev *input;
  33         struct urb *irq;
  34
  35         unsigned char *data;
  36         dma_addr_t data_dma;
  37 };
  38
  39 static void usb_acecad_irq(struct urb *urb)
  40 {
  41         struct usb_acecad *acecad = urb->context;
  42         unsigned char *data = acecad->data;
  43         struct input_dev *dev = acecad->input;
  44         struct usb_interface *intf = acecad->intf;
  45         struct usb_device *udev = interface_to_usbdev(intf);
  46         int prox, status;
  47
  48         switch (urb->status) {
  49         case 0:
  50                 /* success */
  51                 break;
  52         case -ECONNRESET:
  53         case -ENOENT:
  54         case -ESHUTDOWN:
  55                 /* this urb is terminated, clean up */
  56                 dev_dbg(&intf->dev, "%s - urb shutting down with status: %d\n",
  57                         __func__, urb->status);
  58                 return;
  59         default:
  60                 dev_dbg(&intf->dev, "%s - nonzero urb status received: %d\n",
  61                         __func__, urb->status);
  62                 goto resubmit;
  63         }
  64
  65         prox = (data[0] & 0x04) >> 2;
  66         input_report_key(dev, BTN_TOOL_PEN, prox);
  67
  68         if (prox) {
  69                 int x = data[1] | (data[2] << 8);
  70                 int y = data[3] | (data[4] << 8);
  71                 /* Pressure should compute the same way for flair and 302 */
  72                 int pressure = data[5] | (data[6] << 8);
  73                 int touch = data[0] & 0x01;
  74                 int stylus = (data[0] & 0x10) >> 4;
  75                 int stylus2 = (data[0] & 0x20) >> 5;
  76                 input_report_abs(dev, ABS_X, x);
  77                 input_report_abs(dev, ABS_Y, y);
  78                 input_report_abs(dev, ABS_PRESSURE, pressure);
  79                 input_report_key(dev, BTN_TOUCH, touch);
  80                 input_report_key(dev, BTN_STYLUS, stylus);
  81                 input_report_key(dev, BTN_STYLUS2, stylus2);
  82         }
  83
  84         /* event termination */
  85         input_sync(dev);
  86
  87 resubmit:
  88         status = usb_submit_urb(urb, GFP_ATOMIC);
  89         if (status)
  90                 dev_err(&intf->dev,
  91                         "can't resubmit intr, %s-%s/input0, status %d\n",
  92                         udev->bus->bus_name,
  93                         udev->devpath, status);
  94 }
  95
  96 static int usb_acecad_open(struct input_dev *dev)
  97 {
  98         struct usb_acecad *acecad = input_get_drvdata(dev);
  99
 100         acecad->irq->dev = interface_to_usbdev(acecad->intf);
 101         if (usb_submit_urb(acecad->irq, GFP_KERNEL))
 102                 return -EIO;
 103
 104         return 0;
 105 }
 106
 107 static void usb_acecad_close(struct input_dev *dev)
 108 {
 109         struct usb_acecad *acecad = input_get_drvdata(dev);
 110
 111         usb_kill_urb(acecad->irq);
 112 }
 113
 114 static int usb_acecad_probe(struct usb_interface *intf, const struct usb_device_id *id)
 115 {
 116         struct usb_device *dev = interface_to_usbdev(intf);
 117         struct usb_host_interface *interface = intf->cur_altsetting;
 118         struct usb_endpoint_descriptor *endpoint;
 119         struct usb_acecad *acecad;
 120         struct input_dev *input_dev;
 121         int pipe, maxp;
 122         int err;
 123
 124         if (interface->desc.bNumEndpoints != 1)
 125                 return -ENODEV;
 126
 127         endpoint = &interface->endpoint[0].desc;
 128
 129         if (!usb_endpoint_is_int_in(endpoint))
 130                 return -ENODEV;
 131
 132         pipe = usb_rcvintpipe(dev, endpoint->bEndpointAddress);
 133         maxp = usb_maxpacket(dev, pipe, usb_pipeout(pipe));
 134
 135         acecad = kzalloc(sizeof(struct usb_acecad), GFP_KERNEL);
 136         input_dev = input_allocate_device();
 137         if (!acecad || !input_dev) {
 138                 err = -ENOMEM;
 139                 goto fail1;
 140         }
 141
 142         acecad->data = usb_alloc_coherent(dev, 8, GFP_KERNEL, &acecad->data_dma);
 143         if (!acecad->data) {
 144                 err= -ENOMEM;
 145                 goto fail1;
 146         }
 147
 148         acecad->irq = usb_alloc_urb(0, GFP_KERNEL);
 149         if (!acecad->irq) {
 150                 err = -ENOMEM;
 151                 goto fail2;
 152         }
 153
 154         acecad->intf = intf;
 155         acecad->input = input_dev;
 156
 157         if (dev->manufacturer)
 158                 strlcpy(acecad->name, dev->manufacturer, sizeof(acecad->name));
 159
 160         if (dev->product) {
 161                 if (dev->manufacturer)
 162                         strlcat(acecad->name, " ", sizeof(acecad->name));
 163                 strlcat(acecad->name, dev->product, sizeof(acecad->name));
 164         }
 165
 166         usb_make_path(dev, acecad->phys, sizeof(acecad->phys));
 167         strlcat(acecad->phys, "/input0", sizeof(acecad->phys));
 168
 169         input_dev->name = acecad->name;
 170         input_dev->phys = acecad->phys;
 171         usb_to_input_id(dev, &input_dev->id);
 172         input_dev->dev.parent = &intf->dev;
 173
 174         input_set_drvdata(input_dev, acecad);
 175
 176         input_dev->open = usb_acecad_open;
 177         input_dev->close = usb_acecad_close;
 178
 179         input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);
 180         input_dev->keybit[BIT_WORD(BTN_DIGI)] = BIT_MASK(BTN_TOOL_PEN) |
 181                 BIT_MASK(BTN_TOUCH) | BIT_MASK(BTN_STYLUS) |
 182                 BIT_MASK(BTN_STYLUS2);
 183
 184         switch (id->driver_info) {
 185         case 0:
 186                 input_set_abs_params(input_dev, ABS_X, 0, 5000, 4, 0);
 187                 input_set_abs_params(input_dev, ABS_Y, 0, 3750, 4, 0);
 188                 input_set_abs_params(input_dev, ABS_PRESSURE, 0, 512, 0, 0);
 189                 if (!strlen(acecad->name))
 190                         snprintf(acecad->name, sizeof(acecad->name),
 191                                 "USB Acecad Flair Tablet %04x:%04x",
 192                                 le16_to_cpu(dev->descriptor.idVendor),
 193                                 le16_to_cpu(dev->descriptor.idProduct));
 194                 break;
 195
 196         case 1:
 197                 input_set_abs_params(input_dev, ABS_X, 0, 53000, 4, 0);
 198                 input_set_abs_params(input_dev, ABS_Y, 0, 2250, 4, 0);
 199                 input_set_abs_params(input_dev, ABS_PRESSURE, 0, 1024, 0, 0);
 200                 if (!strlen(acecad->name))
 201                         snprintf(acecad->name, sizeof(acecad->name),
 202                                 "USB Acecad 302 Tablet %04x:%04x",
 203                                 le16_to_cpu(dev->descriptor.idVendor),
 204                                 le16_to_cpu(dev->descriptor.idProduct));
 205                 break;
 206         }
 207
 208         usb_fill_int_urb(acecad->irq, dev, pipe,
 209                         acecad->data, maxp > 8 ? 8 : maxp,
 210                         usb_acecad_irq, acecad, endpoint->bInterval);
 211         acecad->irq->transfer_dma = acecad->data_dma;
 212         acecad->irq->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
 213
 214         err = input_register_device(acecad->input);
 215         if (err)
 216                 goto fail3;
 217
 218         usb_set_intfdata(intf, acecad);
 219
 220         return 0;
 221
 222  fail3: usb_free_urb(acecad->irq);
 223  fail2: usb_free_coherent(dev, 8, acecad->data, acecad->data_dma);
 224  fail1: input_free_device(input_dev);
 225         kfree(acecad);
 226         return err;
 227 }
 228
 229 static void usb_acecad_disconnect(struct usb_interface *intf)
 230 {
 231         struct usb_acecad *acecad = usb_get_intfdata(intf);
 232         struct usb_device *udev = interface_to_usbdev(intf);
 233
 234         usb_set_intfdata(intf, NULL);
 235
 236         input_unregister_device(acecad->input);
 237         usb_free_urb(acecad->irq);
 238         usb_free_coherent(udev, 8, acecad->data, acecad->data_dma);
 239         kfree(acecad);
 240 }
 241
 242 static const struct usb_device_id usb_acecad_id_table[] = {
 243         { USB_DEVICE(USB_VENDOR_ID_ACECAD, USB_DEVICE_ID_FLAIR), .driver_info = 0 },
 244         { USB_DEVICE(USB_VENDOR_ID_ACECAD, USB_DEVICE_ID_302),   .driver_info = 1 },
 245         { }
 246 };
 247
 248 MODULE_DEVICE_TABLE(usb, usb_acecad_id_table);
 249
 250 static struct usb_driver usb_acecad_driver = {
 251         .name =         "usb_acecad",
 252         .probe =        usb_acecad_probe,
 253         .disconnect =   usb_acecad_disconnect,
 254         .id_table =     usb_acecad_id_table,
 255 };
 256
 257 module_usb_driver(usb_acecad_driver);