--- /dev/null
+#include <linux/kernel.h>
+#include <linux/slab.h>
+#include <linux/module.h>
+#include <linux/usb/input.h>
+#include <asm/unaligned.h>
+
+/*
+ * Version Information
+ * v0.0.1 - Original, extremely basic version, 2.4.xx only
+ * v0.0.2 - Updated, works with 2.5.62 and 2.4.20;
+ * - added pressure-threshold modules param code from
+ * Alex Perry <alex.perry@ieee.org>
+ */
+
+#define DRIVER_VERSION "v0.0.2"
+#define DRIVER_AUTHOR "Josh Myer <josh@joshisanerd.com>"
+#define DRIVER_DESC "USB KB Gear JamStudio Tablet driver"
+#define DRIVER_LICENSE "GPL"
+
+MODULE_AUTHOR(DRIVER_AUTHOR);
+MODULE_DESCRIPTION(DRIVER_DESC);
+MODULE_LICENSE(DRIVER_LICENSE);
+
+#define USB_VENDOR_ID_KBGEAR 0x084e
+
+static int kb_pressure_click = 0x10;
+module_param(kb_pressure_click, int, 0);
+MODULE_PARM_DESC(kb_pressure_click, "pressure threshold for clicks");
+
+struct kbtab {
+ unsigned char *data;
+ dma_addr_t data_dma;
+ struct input_dev *dev;
+ struct usb_device *usbdev;
+ struct usb_interface *intf;
+ struct urb *irq;
+ char phys[32];
+};
+
+static void kbtab_irq(struct urb *urb)
+{
+ struct kbtab *kbtab = urb->context;
+ unsigned char *data = kbtab->data;
+ struct input_dev *dev = kbtab->dev;
+ int pressure;
+ int retval;
+
+ switch (urb->status) {
+ case 0:
+ /* success */
+ break;
+ case -ECONNRESET:
+ case -ENOENT:
+ case -ESHUTDOWN:
+ /* this urb is terminated, clean up */
+ dev_dbg(&kbtab->intf->dev,
+ "%s - urb shutting down with status: %d\n",
+ __func__, urb->status);
+ return;
+ default:
+ dev_dbg(&kbtab->intf->dev,
+ "%s - nonzero urb status received: %d\n",
+ __func__, urb->status);
+ goto exit;
+ }
+
+
+ input_report_key(dev, BTN_TOOL_PEN, 1);
+
+ input_report_abs(dev, ABS_X, get_unaligned_le16(&data[1]));
+ input_report_abs(dev, ABS_Y, get_unaligned_le16(&data[3]));
+
+ /*input_report_key(dev, BTN_TOUCH , data[0] & 0x01);*/
+ input_report_key(dev, BTN_RIGHT, data[0] & 0x02);
+
+ pressure = data[5];
+ if (kb_pressure_click == -1)
+ input_report_abs(dev, ABS_PRESSURE, pressure);
+ else
+ input_report_key(dev, BTN_LEFT, pressure > kb_pressure_click ? 1 : 0);
+
+ input_sync(dev);
+
+ exit:
+ retval = usb_submit_urb(urb, GFP_ATOMIC);
+ if (retval)
+ dev_err(&kbtab->intf->dev,
+ "%s - usb_submit_urb failed with result %d\n",
+ __func__, retval);
+}
+
+static struct usb_device_id kbtab_ids[] = {
+ { USB_DEVICE(USB_VENDOR_ID_KBGEAR, 0x1001), .driver_info = 0 },
+ { }
+};
+
+MODULE_DEVICE_TABLE(usb, kbtab_ids);
+
+static int kbtab_open(struct input_dev *dev)
+{
+ struct kbtab *kbtab = input_get_drvdata(dev);
+
+ kbtab->irq->dev = kbtab->usbdev;
+ if (usb_submit_urb(kbtab->irq, GFP_KERNEL))
+ return -EIO;
+
+ return 0;
+}
+
+static void kbtab_close(struct input_dev *dev)
+{
+ struct kbtab *kbtab = input_get_drvdata(dev);
+
+ usb_kill_urb(kbtab->irq);
+}
+
+static int kbtab_probe(struct usb_interface *intf, const struct usb_device_id *id)
+{
+ struct usb_device *dev = interface_to_usbdev(intf);
+ struct usb_endpoint_descriptor *endpoint;
+ struct kbtab *kbtab;
+ struct input_dev *input_dev;
+ int error = -ENOMEM;
+
+ kbtab = kzalloc(sizeof(struct kbtab), GFP_KERNEL);
+ input_dev = input_allocate_device();
+ if (!kbtab || !input_dev)
+ goto fail1;
+
+ kbtab->data = usb_alloc_coherent(dev, 8, GFP_KERNEL, &kbtab->data_dma);
+ if (!kbtab->data)
+ goto fail1;
+
+ kbtab->irq = usb_alloc_urb(0, GFP_KERNEL);
+ if (!kbtab->irq)
+ goto fail2;
+
+ kbtab->usbdev = dev;
+ kbtab->intf = intf;
+ kbtab->dev = input_dev;
+
+ usb_make_path(dev, kbtab->phys, sizeof(kbtab->phys));
+ strlcat(kbtab->phys, "/input0", sizeof(kbtab->phys));
+
+ input_dev->name = "KB Gear Tablet";
+ input_dev->phys = kbtab->phys;
+ usb_to_input_id(dev, &input_dev->id);
+ input_dev->dev.parent = &intf->dev;
+
+ input_set_drvdata(input_dev, kbtab);
+
+ input_dev->open = kbtab_open;
+ input_dev->close = kbtab_close;
+
+ input_dev->evbit[0] |= BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);
+ input_dev->keybit[BIT_WORD(BTN_LEFT)] |=
+ BIT_MASK(BTN_LEFT) | BIT_MASK(BTN_RIGHT);
+ input_dev->keybit[BIT_WORD(BTN_DIGI)] |=
+ BIT_MASK(BTN_TOOL_PEN) | BIT_MASK(BTN_TOUCH);
+ input_set_abs_params(input_dev, ABS_X, 0, 0x2000, 4, 0);
+ input_set_abs_params(input_dev, ABS_Y, 0, 0x1750, 4, 0);
+ input_set_abs_params(input_dev, ABS_PRESSURE, 0, 0xff, 0, 0);
+
+ endpoint = &intf->cur_altsetting->endpoint[0].desc;
+
+ usb_fill_int_urb(kbtab->irq, dev,
+ usb_rcvintpipe(dev, endpoint->bEndpointAddress),
+ kbtab->data, 8,
+ kbtab_irq, kbtab, endpoint->bInterval);
+ kbtab->irq->transfer_dma = kbtab->data_dma;
+ kbtab->irq->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
+
+ error = input_register_device(kbtab->dev);
+ if (error)
+ goto fail3;
+
+ usb_set_intfdata(intf, kbtab);
+
+ return 0;
+
+ fail3: usb_free_urb(kbtab->irq);
+ fail2: usb_free_coherent(dev, 8, kbtab->data, kbtab->data_dma);
+ fail1: input_free_device(input_dev);
+ kfree(kbtab);
+ return error;
+}
+
+static void kbtab_disconnect(struct usb_interface *intf)
+{
+ struct kbtab *kbtab = usb_get_intfdata(intf);
+
+ usb_set_intfdata(intf, NULL);
+
+ input_unregister_device(kbtab->dev);
+ usb_free_urb(kbtab->irq);
+ usb_free_coherent(kbtab->usbdev, 8, kbtab->data, kbtab->data_dma);
+ kfree(kbtab);
+}
+
+static struct usb_driver kbtab_driver = {
+ .name = "kbtab",
+ .probe = kbtab_probe,
+ .disconnect = kbtab_disconnect,
+ .id_table = kbtab_ids,
+};
+
+module_usb_driver(kbtab_driver);
Code Review / kvmfornfv.git / blobdiff