input/tablet/acecad.c

0001 // SPDX-License-Identifier: GPL-2.0-or-later
0002 /*
0003  *  Copyright (c) 2001-2005 Edouard TISSERANT   <edouard.tisserant@wanadoo.fr>
0004  *  Copyright (c) 2004-2005 Stephane VOLTZ      <svoltz@numericable.fr>
0005  *
0006  *  USB Acecad "Acecad Flair" tablet support
0007  *
0008  *  Changelog:
0009  *      v3.2 - Added sysfs support
0010  */
0011
0012 /*
0013  */
0014
0015 #include <linux/kernel.h>
0016 #include <linux/slab.h>
0017 #include <linux/module.h>
0018 #include <linux/usb/input.h>
0019
0020 MODULE_AUTHOR("Edouard TISSERANT <edouard.tisserant@wanadoo.fr>");
0021 MODULE_DESCRIPTION("USB Acecad Flair tablet driver");
0022 MODULE_LICENSE("GPL");
0023
0024 #define USB_VENDOR_ID_ACECAD    0x0460
0025 #define USB_DEVICE_ID_FLAIR 0x0004
0026 #define USB_DEVICE_ID_302   0x0008
0027
0028 struct usb_acecad {
0029     char name[128];
0030     char phys[64];
0031     struct usb_interface *intf;
0032     struct input_dev *input;
0033     struct urb *irq;
0034
0035     unsigned char *data;
0036     dma_addr_t data_dma;
0037 };
0038
0039 static void usb_acecad_irq(struct urb *urb)
0040 {
0041     struct usb_acecad *acecad = urb->context;
0042     unsigned char *data = acecad->data;
0043     struct input_dev *dev = acecad->input;
0044     struct usb_interface *intf = acecad->intf;
0045     struct usb_device *udev = interface_to_usbdev(intf);
0046     int prox, status;
0047
0048     switch (urb->status) {
0049     case 0:
0050         /* success */
0051         break;
0052     case -ECONNRESET:
0053     case -ENOENT:
0054     case -ESHUTDOWN:
0055         /* this urb is terminated, clean up */
0056         dev_dbg(&intf->dev, "%s - urb shutting down with status: %d\n",
0057             __func__, urb->status);
0058         return;
0059     default:
0060         dev_dbg(&intf->dev, "%s - nonzero urb status received: %d\n",
0061             __func__, urb->status);
0062         goto resubmit;
0063     }
0064
0065     prox = (data[0] & 0x04) >> 2;
0066     input_report_key(dev, BTN_TOOL_PEN, prox);
0067
0068     if (prox) {
0069         int x = data[1] | (data[2] << 8);
0070         int y = data[3] | (data[4] << 8);
0071         /* Pressure should compute the same way for flair and 302 */
0072         int pressure = data[5] | (data[6] << 8);
0073         int touch = data[0] & 0x01;
0074         int stylus = (data[0] & 0x10) >> 4;
0075         int stylus2 = (data[0] & 0x20) >> 5;
0076         input_report_abs(dev, ABS_X, x);
0077         input_report_abs(dev, ABS_Y, y);
0078         input_report_abs(dev, ABS_PRESSURE, pressure);
0079         input_report_key(dev, BTN_TOUCH, touch);
0080         input_report_key(dev, BTN_STYLUS, stylus);
0081         input_report_key(dev, BTN_STYLUS2, stylus2);
0082     }
0083
0084     /* event termination */
0085     input_sync(dev);
0086
0087 resubmit:
0088     status = usb_submit_urb(urb, GFP_ATOMIC);
0089     if (status)
0090         dev_err(&intf->dev,
0091             "can't resubmit intr, %s-%s/input0, status %d\n",
0092             udev->bus->bus_name,
0093             udev->devpath, status);
0094 }
0095
0096 static int usb_acecad_open(struct input_dev *dev)
0097 {
0098     struct usb_acecad *acecad = input_get_drvdata(dev);
0099
0100     acecad->irq->dev = interface_to_usbdev(acecad->intf);
0101     if (usb_submit_urb(acecad->irq, GFP_KERNEL))
0102         return -EIO;
0103
0104     return 0;
0105 }
0106
0107 static void usb_acecad_close(struct input_dev *dev)
0108 {
0109     struct usb_acecad *acecad = input_get_drvdata(dev);
0110
0111     usb_kill_urb(acecad->irq);
0112 }
0113
0114 static int usb_acecad_probe(struct usb_interface *intf, const struct usb_device_id *id)
0115 {
0116     struct usb_device *dev = interface_to_usbdev(intf);
0117     struct usb_host_interface *interface = intf->cur_altsetting;
0118     struct usb_endpoint_descriptor *endpoint;
0119     struct usb_acecad *acecad;
0120     struct input_dev *input_dev;
0121     int pipe, maxp;
0122     int err;
0123
0124     if (interface->desc.bNumEndpoints != 1)
0125         return -ENODEV;
0126
0127     endpoint = &interface->endpoint[0].desc;
0128
0129     if (!usb_endpoint_is_int_in(endpoint))
0130         return -ENODEV;
0131
0132     pipe = usb_rcvintpipe(dev, endpoint->bEndpointAddress);
0133     maxp = usb_maxpacket(dev, pipe);
0134
0135     acecad = kzalloc(sizeof(struct usb_acecad), GFP_KERNEL);
0136     input_dev = input_allocate_device();
0137     if (!acecad || !input_dev) {
0138         err = -ENOMEM;
0139         goto fail1;
0140     }
0141
0142     acecad->data = usb_alloc_coherent(dev, 8, GFP_KERNEL, &acecad->data_dma);
0143     if (!acecad->data) {
0144         err= -ENOMEM;
0145         goto fail1;
0146     }
0147
0148     acecad->irq = usb_alloc_urb(0, GFP_KERNEL);
0149     if (!acecad->irq) {
0150         err = -ENOMEM;
0151         goto fail2;
0152     }
0153
0154     acecad->intf = intf;
0155     acecad->input = input_dev;
0156
0157     if (dev->manufacturer)
0158         strlcpy(acecad->name, dev->manufacturer, sizeof(acecad->name));
0159
0160     if (dev->product) {
0161         if (dev->manufacturer)
0162             strlcat(acecad->name, " ", sizeof(acecad->name));
0163         strlcat(acecad->name, dev->product, sizeof(acecad->name));
0164     }
0165
0166     usb_make_path(dev, acecad->phys, sizeof(acecad->phys));
0167     strlcat(acecad->phys, "/input0", sizeof(acecad->phys));
0168
0169     input_dev->name = acecad->name;
0170     input_dev->phys = acecad->phys;
0171     usb_to_input_id(dev, &input_dev->id);
0172     input_dev->dev.parent = &intf->dev;
0173
0174     input_set_drvdata(input_dev, acecad);
0175
0176     input_dev->open = usb_acecad_open;
0177     input_dev->close = usb_acecad_close;
0178
0179     input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);
0180     input_dev->keybit[BIT_WORD(BTN_DIGI)] = BIT_MASK(BTN_TOOL_PEN) |
0181         BIT_MASK(BTN_TOUCH) | BIT_MASK(BTN_STYLUS) |
0182         BIT_MASK(BTN_STYLUS2);
0183
0184     switch (id->driver_info) {
0185     case 0:
0186         input_set_abs_params(input_dev, ABS_X, 0, 5000, 4, 0);
0187         input_set_abs_params(input_dev, ABS_Y, 0, 3750, 4, 0);
0188         input_set_abs_params(input_dev, ABS_PRESSURE, 0, 512, 0, 0);
0189         if (!strlen(acecad->name))
0190             snprintf(acecad->name, sizeof(acecad->name),
0191                 "USB Acecad Flair Tablet %04x:%04x",
0192                 le16_to_cpu(dev->descriptor.idVendor),
0193                 le16_to_cpu(dev->descriptor.idProduct));
0194         break;
0195
0196     case 1:
0197         input_set_abs_params(input_dev, ABS_X, 0, 53000, 4, 0);
0198         input_set_abs_params(input_dev, ABS_Y, 0, 2250, 4, 0);
0199         input_set_abs_params(input_dev, ABS_PRESSURE, 0, 1024, 0, 0);
0200         if (!strlen(acecad->name))
0201             snprintf(acecad->name, sizeof(acecad->name),
0202                 "USB Acecad 302 Tablet %04x:%04x",
0203                 le16_to_cpu(dev->descriptor.idVendor),
0204                 le16_to_cpu(dev->descriptor.idProduct));
0205         break;
0206     }
0207
0208     usb_fill_int_urb(acecad->irq, dev, pipe,
0209             acecad->data, maxp > 8 ? 8 : maxp,
0210             usb_acecad_irq, acecad, endpoint->bInterval);
0211     acecad->irq->transfer_dma = acecad->data_dma;
0212     acecad->irq->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
0213
0214     err = input_register_device(acecad->input);
0215     if (err)
0216         goto fail3;
0217
0218     usb_set_intfdata(intf, acecad);
0219
0220     return 0;
0221
0222  fail3: usb_free_urb(acecad->irq);
0223  fail2: usb_free_coherent(dev, 8, acecad->data, acecad->data_dma);
0224  fail1: input_free_device(input_dev);
0225     kfree(acecad);
0226     return err;
0227 }
0228
0229 static void usb_acecad_disconnect(struct usb_interface *intf)
0230 {
0231     struct usb_acecad *acecad = usb_get_intfdata(intf);
0232     struct usb_device *udev = interface_to_usbdev(intf);
0233
0234     usb_set_intfdata(intf, NULL);
0235
0236     input_unregister_device(acecad->input);
0237     usb_free_urb(acecad->irq);
0238     usb_free_coherent(udev, 8, acecad->data, acecad->data_dma);
0239     kfree(acecad);
0240 }
0241
0242 static const struct usb_device_id usb_acecad_id_table[] = {
0243     { USB_DEVICE(USB_VENDOR_ID_ACECAD, USB_DEVICE_ID_FLAIR), .driver_info = 0 },
0244     { USB_DEVICE(USB_VENDOR_ID_ACECAD, USB_DEVICE_ID_302),   .driver_info = 1 },
0245     { }
0246 };
0247
0248 MODULE_DEVICE_TABLE(usb, usb_acecad_id_table);
0249
0250 static struct usb_driver usb_acecad_driver = {
0251     .name =     "usb_acecad",
0252     .probe =    usb_acecad_probe,
0253     .disconnect =   usb_acecad_disconnect,
0254     .id_table = usb_acecad_id_table,
0255 };
0256
0257 module_usb_driver(usb_acecad_driver);