linux/drivers/input/tablet/acecad.c
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   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
  20MODULE_AUTHOR("Edouard TISSERANT <edouard.tisserant@wanadoo.fr>");
  21MODULE_DESCRIPTION("USB Acecad Flair tablet driver");
  22MODULE_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
  28struct 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
  39static 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
  87resubmit:
  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
  96static 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
 107static 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
 114static 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);
 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
 229static 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
 242static 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
 248MODULE_DEVICE_TABLE(usb, usb_acecad_id_table);
 249
 250static 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
 257module_usb_driver(usb_acecad_driver);
 258