1 #include <linux/kernel.h>
2 #include <linux/slab.h>
3 #include <linux/input.h>
4 #include <linux/module.h>
5 #include <linux/init.h>
7 #include <asm/unaligned.h>
8 #include <asm/byteorder.h>
12 * v0.0.1 - Original, extremely basic version, 2.4.xx only
13 * v0.0.2 - Updated, works with 2.5.62 and 2.4.20;
14 * - added pressure-threshold modules param code from
15 * Alex Perry <alex.perry@ieee.org>
18 #define DRIVER_VERSION "v0.0.2"
19 #define DRIVER_AUTHOR "Josh Myer <josh@joshisanerd.com>"
20 #define DRIVER_DESC "USB KB Gear JamStudio Tablet driver"
21 #define DRIVER_LICENSE "GPL"
23 MODULE_AUTHOR(DRIVER_AUTHOR);
24 MODULE_DESCRIPTION(DRIVER_DESC);
25 MODULE_LICENSE(DRIVER_LICENSE);
27 #define USB_VENDOR_ID_KBGEAR 0x084e
29 static int kb_pressure_click = 0x10;
30 MODULE_PARM (kb_pressure_click,"i");
31 MODULE_PARM_DESC(kb_pressure_click,
32 "pressure threshold for clicks");
38 struct usb_device *usbdev;
48 static void kbtab_irq(struct urb *urb, struct pt_regs *regs)
50 struct kbtab *kbtab = urb->context;
51 unsigned char *data = kbtab->data;
52 struct input_dev *dev = &kbtab->dev;
55 switch (urb->status) {
62 /* this urb is terminated, clean up */
63 dbg("%s - urb shutting down with status: %d", __FUNCTION__, urb->status);
66 dbg("%s - nonzero urb status received: %d", __FUNCTION__, urb->status);
70 kbtab->x = le16_to_cpu(get_unaligned((u16 *) &data[1]));
71 kbtab->y = le16_to_cpu(get_unaligned((u16 *) &data[3]));
73 kbtab->pressure = (data[5]);
75 input_report_key(dev, BTN_TOOL_PEN, 1);
77 input_report_abs(dev, ABS_X, kbtab->x);
78 input_report_abs(dev, ABS_Y, kbtab->y);
80 /*input_report_key(dev, BTN_TOUCH , data[0] & 0x01);*/
81 input_report_key(dev, BTN_RIGHT, data[0] & 0x02);
83 if( -1 == kb_pressure_click){
84 input_report_abs(dev, ABS_PRESSURE, kbtab->pressure);
86 input_report_key(dev, BTN_LEFT, (kbtab->pressure > kb_pressure_click) ? 1 : 0);
92 retval = usb_submit_urb (urb, GFP_ATOMIC);
94 err ("%s - usb_submit_urb failed with result %d",
95 __FUNCTION__, retval);
98 struct usb_device_id kbtab_ids[] = {
99 { USB_DEVICE(USB_VENDOR_ID_KBGEAR, 0x1001), .driver_info = 0 },
103 MODULE_DEVICE_TABLE(usb, kbtab_ids);
105 static int kbtab_open(struct input_dev *dev)
107 struct kbtab *kbtab = dev->private;
112 kbtab->irq->dev = kbtab->usbdev;
113 if (usb_submit_urb(kbtab->irq, GFP_KERNEL)) {
121 static void kbtab_close(struct input_dev *dev)
123 struct kbtab *kbtab = dev->private;
126 usb_unlink_urb(kbtab->irq);
129 static int kbtab_probe(struct usb_interface *intf, const struct usb_device_id *id)
131 struct usb_device *dev = interface_to_usbdev(intf);
132 struct usb_endpoint_descriptor *endpoint;
136 if (!(kbtab = kmalloc(sizeof(struct kbtab), GFP_KERNEL)))
138 memset(kbtab, 0, sizeof(struct kbtab));
140 kbtab->data = usb_buffer_alloc(dev, 8, GFP_KERNEL, &kbtab->data_dma);
146 kbtab->irq = usb_alloc_urb(0, GFP_KERNEL);
148 usb_buffer_free(dev, 10, kbtab->data, kbtab->data_dma);
153 kbtab->dev.evbit[0] |= BIT(EV_KEY) | BIT(EV_ABS) | BIT(EV_MSC);
154 kbtab->dev.absbit[0] |= BIT(ABS_X) | BIT(ABS_Y) | BIT(ABS_PRESSURE);
156 kbtab->dev.keybit[LONG(BTN_LEFT)] |= BIT(BTN_LEFT) | BIT(BTN_RIGHT) | BIT(BTN_MIDDLE);
158 kbtab->dev.keybit[LONG(BTN_DIGI)] |= BIT(BTN_TOOL_PEN) | BIT(BTN_TOUCH);
160 kbtab->dev.mscbit[0] |= BIT(MSC_SERIAL);
162 kbtab->dev.absmax[ABS_X] = 0x2000;
163 kbtab->dev.absmax[ABS_Y] = 0x1750;
164 kbtab->dev.absmax[ABS_PRESSURE] = 0xff;
166 kbtab->dev.absfuzz[ABS_X] = 4;
167 kbtab->dev.absfuzz[ABS_Y] = 4;
169 kbtab->dev.private = kbtab;
170 kbtab->dev.open = kbtab_open;
171 kbtab->dev.close = kbtab_close;
173 usb_make_path(dev, path, 64);
174 sprintf(kbtab->phys, "%s/input0", path);
176 kbtab->dev.name = "KB Gear Tablet";
177 kbtab->dev.phys = kbtab->phys;
178 kbtab->dev.id.bustype = BUS_USB;
179 kbtab->dev.id.vendor = dev->descriptor.idVendor;
180 kbtab->dev.id.product = dev->descriptor.idProduct;
181 kbtab->dev.id.version = dev->descriptor.bcdDevice;
182 kbtab->dev.dev = &intf->dev;
185 endpoint = &intf->cur_altsetting->endpoint[0].desc;
187 usb_fill_int_urb(kbtab->irq, dev,
188 usb_rcvintpipe(dev, endpoint->bEndpointAddress),
190 kbtab_irq, kbtab, endpoint->bInterval);
191 kbtab->irq->transfer_dma = kbtab->data_dma;
192 kbtab->irq->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
194 input_register_device(&kbtab->dev);
196 printk(KERN_INFO "input: KB Gear Tablet on %s\n", path);
198 usb_set_intfdata(intf, kbtab);
203 static void kbtab_disconnect(struct usb_interface *intf)
205 struct kbtab *kbtab = usb_get_intfdata (intf);
207 usb_set_intfdata(intf, NULL);
209 usb_unlink_urb(kbtab->irq);
210 input_unregister_device(&kbtab->dev);
211 usb_free_urb(kbtab->irq);
212 usb_buffer_free(interface_to_usbdev(intf), 10, kbtab->data, kbtab->data_dma);
217 static struct usb_driver kbtab_driver = {
218 .owner = THIS_MODULE,
220 .probe = kbtab_probe,
221 .disconnect = kbtab_disconnect,
222 .id_table = kbtab_ids,
225 static int __init kbtab_init(void)
228 retval = usb_register(&kbtab_driver);
231 info(DRIVER_VERSION ":" DRIVER_DESC);
236 static void __exit kbtab_exit(void)
238 usb_deregister(&kbtab_driver);
241 module_init(kbtab_init);
242 module_exit(kbtab_exit);