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