1 files changed, 226 insertions, 0 deletions

diff --git a/drivers/input/tablet/kbtab.c b/drivers/input/tablet/kbtab.c
new file mode 100644
index 000000000000..91e6d00d4a43
--- /dev/null
+++ b/drivers/input/tablet/kbtab.c
@@ -0,0 +1,226 @@
+#include <linux/kernel.h>
+#include <linux/slab.h>
+#include <linux/module.h>
+#include <linux/init.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 urb *irq;
+        int x, y;
+        int button;
+        int pressure;
+        __u32 serial[2];
+        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 retval;
+
+        switch (urb->status) {
+        case 0:
+                /* success */
+                break;
+        case -ECONNRESET:
+        case -ENOENT:
+        case -ESHUTDOWN:
+                /* this urb is terminated, clean up */
+                dbg("%s - urb shutting down with status: %d", __FUNCTION__, urb->status);
+                return;
+        default:
+                dbg("%s - nonzero urb status received: %d", __FUNCTION__, urb->status);
+                goto exit;
+        }
+
+        kbtab->x = le16_to_cpu(get_unaligned((__le16 *) &data[1]));
+        kbtab->y = le16_to_cpu(get_unaligned((__le16 *) &data[3]));
+
+        kbtab->pressure = (data[5]);
+
+        input_report_key(dev, BTN_TOOL_PEN, 1);
+
+        input_report_abs(dev, ABS_X, kbtab->x);
+        input_report_abs(dev, ABS_Y, kbtab->y);
+
+        /*input_report_key(dev, BTN_TOUCH , data[0] & 0x01);*/
+        input_report_key(dev, BTN_RIGHT, data[0] & 0x02);
+
+        if (-1 == kb_pressure_click) {
+                input_report_abs(dev, ABS_PRESSURE, kbtab->pressure);
+        } else {
+                input_report_key(dev, BTN_LEFT, (kbtab->pressure > kb_pressure_click) ? 1 : 0);
+        };
+
+        input_sync(dev);
+
+ exit:
+        retval = usb_submit_urb (urb, GFP_ATOMIC);
+        if (retval)
+                err ("%s - usb_submit_urb failed with result %d",
+                     __FUNCTION__, 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_buffer_alloc(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->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(EV_KEY) | BIT(EV_ABS) | BIT(EV_MSC);
+        input_dev->keybit[LONG(BTN_LEFT)] |= BIT(BTN_LEFT) | BIT(BTN_RIGHT) | BIT(BTN_MIDDLE);
+        input_dev->keybit[LONG(BTN_DIGI)] |= BIT(BTN_TOOL_PEN) | BIT(BTN_TOUCH);
+        input_dev->mscbit[0] |= BIT(MSC_SERIAL);
+        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_buffer_free(dev, 10, 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);
+        if (kbtab) {
+                usb_kill_urb(kbtab->irq);
+                input_unregister_device(kbtab->dev);
+                usb_free_urb(kbtab->irq);
+                usb_buffer_free(interface_to_usbdev(intf), 10, 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,
+};
+
+static int __init kbtab_init(void)
+{
+        int retval;
+        retval = usb_register(&kbtab_driver);
+        if (retval)
+                goto out;
+        info(DRIVER_VERSION ":" DRIVER_DESC);
+out:
+        return retval;
+}
+
+static void __exit kbtab_exit(void)
+{
+        usb_deregister(&kbtab_driver);
+}
+
+module_init(kbtab_init);
+module_exit(kbtab_exit);