#include <linux/kernel.h>
#include <linux/slab.h>
#include <linux/module.h>
#include <linux/usb/input.h>
MODULE_AUTHOR("Edouard TISSERANT <edouard.tisserant@wanadoo.fr>");
MODULE_DESCRIPTION("USB Acecad Flair tablet driver");
MODULE_LICENSE("GPL");
#define USB_VENDOR_ID_ACECAD 0x0460
#define USB_DEVICE_ID_FLAIR 0x0004
#define USB_DEVICE_ID_302 0x0008
struct usb_acecad {
char name[128];
char phys[64];
struct usb_interface *intf;
struct input_dev *input;
struct urb *irq;
unsigned char *data;
dma_addr_t data_dma;
};
static void usb_acecad_irq(struct urb *urb)
{
struct usb_acecad *acecad = urb->context;
unsigned char *data = acecad->data;
struct input_dev *dev = acecad->input;
struct usb_interface *intf = acecad->intf;
struct usb_device *udev = interface_to_usbdev(intf);
int prox, status;
switch (urb->status) {
case 0:
break;
case -ECONNRESET:
case -ENOENT:
case -ESHUTDOWN:
dev_dbg(&intf->dev, "%s - urb shutting down with status: %d\n",
__func__, urb->status);
return;
default:
dev_dbg(&intf->dev, "%s - nonzero urb status received: %d\n",
__func__, urb->status);
goto resubmit;
}
prox = (data[0] & 0x04) >> 2;
input_report_key(dev, BTN_TOOL_PEN, prox);
if (prox) {
int x = data[1] | (data[2] << 8);
int y = data[3] | (data[4] << 8);
int pressure = data[5] | (data[6] << 8);
int touch = data[0] & 0x01;
int stylus = (data[0] & 0x10) >> 4;
int stylus2 = (data[0] & 0x20) >> 5;
input_report_abs(dev, ABS_X, x);
input_report_abs(dev, ABS_Y, y);
input_report_abs(dev, ABS_PRESSURE, pressure);
input_report_key(dev, BTN_TOUCH, touch);
input_report_key(dev, BTN_STYLUS, stylus);
input_report_key(dev, BTN_STYLUS2, stylus2);
}
input_sync(dev);
resubmit:
status = usb_submit_urb(urb, GFP_ATOMIC);
if (status)
dev_err(&intf->dev,
"can't resubmit intr, %s-%s/input0, status %d\n",
udev->bus->bus_name,
udev->devpath, status);
}
static int usb_acecad_open(struct input_dev *dev)
{
struct usb_acecad *acecad = input_get_drvdata(dev);
acecad->irq->dev = interface_to_usbdev(acecad->intf);
if (usb_submit_urb(acecad->irq, GFP_KERNEL))
return -EIO;
return 0;
}
static void usb_acecad_close(struct input_dev *dev)
{
struct usb_acecad *acecad = input_get_drvdata(dev);
usb_kill_urb(acecad->irq);
}
static int usb_acecad_probe(struct usb_interface *intf, const struct usb_device_id *id)
{
struct usb_device *dev = interface_to_usbdev(intf);
struct usb_host_interface *interface = intf->cur_altsetting;
struct usb_endpoint_descriptor *endpoint;
struct usb_acecad *acecad;
struct input_dev *input_dev;
int pipe, maxp;
int err;
if (interface->desc.bNumEndpoints != 1)
return -ENODEV;
endpoint = &interface->endpoint[0].desc;
if (!usb_endpoint_is_int_in(endpoint))
return -ENODEV;
pipe = usb_rcvintpipe(dev, endpoint->bEndpointAddress);
maxp = usb_maxpacket(dev, pipe);
acecad = kzalloc_obj(*acecad);
input_dev = input_allocate_device();
if (!acecad || !input_dev) {
err = -ENOMEM;
goto fail1;
}
acecad->data = usb_alloc_coherent(dev, 8, GFP_KERNEL, &acecad->data_dma);
if (!acecad->data) {
err= -ENOMEM;
goto fail1;
}
acecad->irq = usb_alloc_urb(0, GFP_KERNEL);
if (!acecad->irq) {
err = -ENOMEM;
goto fail2;
}
acecad->intf = intf;
acecad->input = input_dev;
if (dev->manufacturer)
strscpy(acecad->name, dev->manufacturer, sizeof(acecad->name));
if (dev->product) {
if (dev->manufacturer)
strlcat(acecad->name, " ", sizeof(acecad->name));
strlcat(acecad->name, dev->product, sizeof(acecad->name));
}
usb_make_path(dev, acecad->phys, sizeof(acecad->phys));
strlcat(acecad->phys, "/input0", sizeof(acecad->phys));
input_dev->name = acecad->name;
input_dev->phys = acecad->phys;
usb_to_input_id(dev, &input_dev->id);
input_dev->dev.parent = &intf->dev;
input_set_drvdata(input_dev, acecad);
input_dev->open = usb_acecad_open;
input_dev->close = usb_acecad_close;
input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);
input_dev->keybit[BIT_WORD(BTN_DIGI)] = BIT_MASK(BTN_TOOL_PEN) |
BIT_MASK(BTN_TOUCH) | BIT_MASK(BTN_STYLUS) |
BIT_MASK(BTN_STYLUS2);
switch (id->driver_info) {
case 0:
input_set_abs_params(input_dev, ABS_X, 0, 5000, 4, 0);
input_set_abs_params(input_dev, ABS_Y, 0, 3750, 4, 0);
input_set_abs_params(input_dev, ABS_PRESSURE, 0, 512, 0, 0);
if (!strlen(acecad->name))
snprintf(acecad->name, sizeof(acecad->name),
"USB Acecad Flair Tablet %04x:%04x",
le16_to_cpu(dev->descriptor.idVendor),
le16_to_cpu(dev->descriptor.idProduct));
break;
case 1:
input_set_abs_params(input_dev, ABS_X, 0, 53000, 4, 0);
input_set_abs_params(input_dev, ABS_Y, 0, 2250, 4, 0);
input_set_abs_params(input_dev, ABS_PRESSURE, 0, 1024, 0, 0);
if (!strlen(acecad->name))
snprintf(acecad->name, sizeof(acecad->name),
"USB Acecad 302 Tablet %04x:%04x",
le16_to_cpu(dev->descriptor.idVendor),
le16_to_cpu(dev->descriptor.idProduct));
break;
}
usb_fill_int_urb(acecad->irq, dev, pipe,
acecad->data, maxp > 8 ? 8 : maxp,
usb_acecad_irq, acecad, endpoint->bInterval);
acecad->irq->transfer_dma = acecad->data_dma;
acecad->irq->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
err = input_register_device(acecad->input);
if (err)
goto fail3;
usb_set_intfdata(intf, acecad);
return 0;
fail3: usb_free_urb(acecad->irq);
fail2: usb_free_coherent(dev, 8, acecad->data, acecad->data_dma);
fail1: input_free_device(input_dev);
kfree(acecad);
return err;
}
static void usb_acecad_disconnect(struct usb_interface *intf)
{
struct usb_acecad *acecad = usb_get_intfdata(intf);
struct usb_device *udev = interface_to_usbdev(intf);
usb_set_intfdata(intf, NULL);
input_unregister_device(acecad->input);
usb_free_urb(acecad->irq);
usb_free_coherent(udev, 8, acecad->data, acecad->data_dma);
kfree(acecad);
}
static const struct usb_device_id usb_acecad_id_table[] = {
{ USB_DEVICE(USB_VENDOR_ID_ACECAD, USB_DEVICE_ID_FLAIR), .driver_info = 0 },
{ USB_DEVICE(USB_VENDOR_ID_ACECAD, USB_DEVICE_ID_302), .driver_info = 1 },
{ }
};
MODULE_DEVICE_TABLE(usb, usb_acecad_id_table);
static struct usb_driver usb_acecad_driver = {
.name = "usb_acecad",
.probe = usb_acecad_probe,
.disconnect = usb_acecad_disconnect,
.id_table = usb_acecad_id_table,
};
module_usb_driver(usb_acecad_driver);
