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 <linux/usb_input.h>
8 #include <asm/unaligned.h>
9 #include <asm/byteorder.h>
13 * v0.0.1 - Original, extremely basic version, 2.4.xx only
14 * v0.0.2 - Updated, works with 2.5.62 and 2.4.20;
15 * - added pressure-threshold modules param code from
16 * Alex Perry <alex.perry@ieee.org>
19 #define DRIVER_VERSION "v0.0.2"
20 #define DRIVER_AUTHOR "Josh Myer <josh@joshisanerd.com>"
21 #define DRIVER_DESC "USB KB Gear JamStudio Tablet driver"
22 #define DRIVER_LICENSE "GPL"
24 MODULE_AUTHOR(DRIVER_AUTHOR);
25 MODULE_DESCRIPTION(DRIVER_DESC);
26 MODULE_LICENSE(DRIVER_LICENSE);
28 #define USB_VENDOR_ID_KBGEAR 0x084e
30 static int kb_pressure_click = 0x10;
31 module_param(kb_pressure_click, int, 0);
32 MODULE_PARM_DESC(kb_pressure_click, "pressure threshold for clicks");
37 struct input_dev *dev;
38 struct usb_device *usbdev;
47 static void kbtab_irq(struct urb *urb, struct pt_regs *regs)
49 struct kbtab *kbtab = urb->context;
50 unsigned char *data = kbtab->data;
51 struct input_dev *dev = kbtab->dev;
54 switch (urb->status) {
61 /* this urb is terminated, clean up */
62 dbg("%s - urb shutting down with status: %d", __FUNCTION__, urb->status);
65 dbg("%s - nonzero urb status received: %d", __FUNCTION__, urb->status);
69 kbtab->x = le16_to_cpu(get_unaligned((__le16 *) &data[1]));
70 kbtab->y = le16_to_cpu(get_unaligned((__le16 *) &data[3]));
72 kbtab->pressure = (data[5]);
74 input_report_key(dev, BTN_TOOL_PEN, 1);
76 input_report_abs(dev, ABS_X, kbtab->x);
77 input_report_abs(dev, ABS_Y, kbtab->y);
79 /*input_report_key(dev, BTN_TOUCH , data[0] & 0x01);*/
80 input_report_key(dev, BTN_RIGHT, data[0] & 0x02);
82 if (-1 == kb_pressure_click) {
83 input_report_abs(dev, ABS_PRESSURE, kbtab->pressure);
85 input_report_key(dev, BTN_LEFT, (kbtab->pressure > kb_pressure_click) ? 1 : 0);
91 retval = usb_submit_urb (urb, GFP_ATOMIC);
93 err ("%s - usb_submit_urb failed with result %d",
94 __FUNCTION__, retval);
97 static struct usb_device_id kbtab_ids[] = {
98 { USB_DEVICE(USB_VENDOR_ID_KBGEAR, 0x1001), .driver_info = 0 },
102 MODULE_DEVICE_TABLE(usb, kbtab_ids);
104 static int kbtab_open(struct input_dev *dev)
106 struct kbtab *kbtab = dev->private;
108 kbtab->irq->dev = kbtab->usbdev;
109 if (usb_submit_urb(kbtab->irq, GFP_KERNEL))
115 static void kbtab_close(struct input_dev *dev)
117 struct kbtab *kbtab = dev->private;
119 usb_kill_urb(kbtab->irq);
122 static int kbtab_probe(struct usb_interface *intf, const struct usb_device_id *id)
124 struct usb_device *dev = interface_to_usbdev(intf);
125 struct usb_endpoint_descriptor *endpoint;
127 struct input_dev *input_dev;
129 kbtab = kzalloc(sizeof(struct kbtab), GFP_KERNEL);
130 input_dev = input_allocate_device();
131 if (!kbtab || !input_dev)
134 kbtab->data = usb_buffer_alloc(dev, 8, GFP_KERNEL, &kbtab->data_dma);
138 kbtab->irq = usb_alloc_urb(0, GFP_KERNEL);
143 kbtab->dev = input_dev;
145 usb_make_path(dev, kbtab->phys, sizeof(kbtab->phys));
146 strlcat(kbtab->phys, "/input0", sizeof(kbtab->phys));
148 input_dev->name = "KB Gear Tablet";
149 input_dev->phys = kbtab->phys;
150 usb_to_input_id(dev, &input_dev->id);
151 input_dev->cdev.dev = &intf->dev;
152 input_dev->private = kbtab;
154 input_dev->open = kbtab_open;
155 input_dev->close = kbtab_close;
157 input_dev->evbit[0] |= BIT(EV_KEY) | BIT(EV_ABS) | BIT(EV_MSC);
158 input_dev->keybit[LONG(BTN_LEFT)] |= BIT(BTN_LEFT) | BIT(BTN_RIGHT) | BIT(BTN_MIDDLE);
159 input_dev->keybit[LONG(BTN_DIGI)] |= BIT(BTN_TOOL_PEN) | BIT(BTN_TOUCH);
160 input_dev->mscbit[0] |= BIT(MSC_SERIAL);
161 input_set_abs_params(input_dev, ABS_X, 0, 0x2000, 4, 0);
162 input_set_abs_params(input_dev, ABS_X, 0, 0x1750, 4, 0);
163 input_set_abs_params(input_dev, ABS_PRESSURE, 0, 0xff, 0, 0);
165 endpoint = &intf->cur_altsetting->endpoint[0].desc;
167 usb_fill_int_urb(kbtab->irq, dev,
168 usb_rcvintpipe(dev, endpoint->bEndpointAddress),
170 kbtab_irq, kbtab, endpoint->bInterval);
171 kbtab->irq->transfer_dma = kbtab->data_dma;
172 kbtab->irq->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
174 input_register_device(kbtab->dev);
176 usb_set_intfdata(intf, kbtab);
179 fail2: usb_buffer_free(dev, 10, kbtab->data, kbtab->data_dma);
180 fail1: input_free_device(input_dev);
185 static void kbtab_disconnect(struct usb_interface *intf)
187 struct kbtab *kbtab = usb_get_intfdata(intf);
189 usb_set_intfdata(intf, NULL);
191 usb_kill_urb(kbtab->irq);
192 input_unregister_device(kbtab->dev);
193 usb_free_urb(kbtab->irq);
194 usb_buffer_free(interface_to_usbdev(intf), 10, kbtab->data, kbtab->data_dma);
199 static struct usb_driver kbtab_driver = {
200 .owner = THIS_MODULE,
202 .probe = kbtab_probe,
203 .disconnect = kbtab_disconnect,
204 .id_table = kbtab_ids,
207 static int __init kbtab_init(void)
210 retval = usb_register(&kbtab_driver);
213 info(DRIVER_VERSION ":" DRIVER_DESC);
218 static void __exit kbtab_exit(void)
220 usb_deregister(&kbtab_driver);
223 module_init(kbtab_init);
224 module_exit(kbtab_exit);