blob: fedbcb127c213676e18d102af6243718019edeba [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001#include <linux/kernel.h>
2#include <linux/slab.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -07003#include <linux/module.h>
4#include <linux/init.h>
David Brownellae0dadc2006-06-13 10:04:34 -07005#include <linux/usb/input.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -07006#include <asm/unaligned.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -07007
8/*
9 * Version Information
10 * v0.0.1 - Original, extremely basic version, 2.4.xx only
11 * v0.0.2 - Updated, works with 2.5.62 and 2.4.20;
12 * - added pressure-threshold modules param code from
13 * Alex Perry <alex.perry@ieee.org>
14 */
15
16#define DRIVER_VERSION "v0.0.2"
17#define DRIVER_AUTHOR "Josh Myer <josh@joshisanerd.com>"
18#define DRIVER_DESC "USB KB Gear JamStudio Tablet driver"
19#define DRIVER_LICENSE "GPL"
20
21MODULE_AUTHOR(DRIVER_AUTHOR);
22MODULE_DESCRIPTION(DRIVER_DESC);
23MODULE_LICENSE(DRIVER_LICENSE);
24
25#define USB_VENDOR_ID_KBGEAR 0x084e
26
27static int kb_pressure_click = 0x10;
28module_param(kb_pressure_click, int, 0);
29MODULE_PARM_DESC(kb_pressure_click, "pressure threshold for clicks");
30
31struct kbtab {
32 signed char *data;
33 dma_addr_t data_dma;
Dmitry Torokhovc5b7c7c2005-09-15 02:01:47 -050034 struct input_dev *dev;
Linus Torvalds1da177e2005-04-16 15:20:36 -070035 struct usb_device *usbdev;
36 struct urb *irq;
Linus Torvalds1da177e2005-04-16 15:20:36 -070037 int x, y;
38 int button;
39 int pressure;
40 __u32 serial[2];
41 char phys[32];
42};
43
David Howells7d12e782006-10-05 14:55:46 +010044static void kbtab_irq(struct urb *urb)
Linus Torvalds1da177e2005-04-16 15:20:36 -070045{
46 struct kbtab *kbtab = urb->context;
47 unsigned char *data = kbtab->data;
Dmitry Torokhovc5b7c7c2005-09-15 02:01:47 -050048 struct input_dev *dev = kbtab->dev;
Linus Torvalds1da177e2005-04-16 15:20:36 -070049 int retval;
50
51 switch (urb->status) {
52 case 0:
53 /* success */
54 break;
55 case -ECONNRESET:
56 case -ENOENT:
57 case -ESHUTDOWN:
58 /* this urb is terminated, clean up */
59 dbg("%s - urb shutting down with status: %d", __FUNCTION__, urb->status);
60 return;
61 default:
62 dbg("%s - nonzero urb status received: %d", __FUNCTION__, urb->status);
63 goto exit;
64 }
65
66 kbtab->x = le16_to_cpu(get_unaligned((__le16 *) &data[1]));
67 kbtab->y = le16_to_cpu(get_unaligned((__le16 *) &data[3]));
68
69 kbtab->pressure = (data[5]);
70
71 input_report_key(dev, BTN_TOOL_PEN, 1);
72
73 input_report_abs(dev, ABS_X, kbtab->x);
74 input_report_abs(dev, ABS_Y, kbtab->y);
75
76 /*input_report_key(dev, BTN_TOUCH , data[0] & 0x01);*/
77 input_report_key(dev, BTN_RIGHT, data[0] & 0x02);
78
Dmitry Torokhov05f091ab2005-05-29 02:29:01 -050079 if (-1 == kb_pressure_click) {
Linus Torvalds1da177e2005-04-16 15:20:36 -070080 input_report_abs(dev, ABS_PRESSURE, kbtab->pressure);
81 } else {
82 input_report_key(dev, BTN_LEFT, (kbtab->pressure > kb_pressure_click) ? 1 : 0);
83 };
Dmitry Torokhov05f091ab2005-05-29 02:29:01 -050084
Linus Torvalds1da177e2005-04-16 15:20:36 -070085 input_sync(dev);
86
87 exit:
88 retval = usb_submit_urb (urb, GFP_ATOMIC);
89 if (retval)
90 err ("%s - usb_submit_urb failed with result %d",
91 __FUNCTION__, retval);
92}
93
94static struct usb_device_id kbtab_ids[] = {
95 { USB_DEVICE(USB_VENDOR_ID_KBGEAR, 0x1001), .driver_info = 0 },
96 { }
97};
98
99MODULE_DEVICE_TABLE(usb, kbtab_ids);
100
101static int kbtab_open(struct input_dev *dev)
102{
103 struct kbtab *kbtab = dev->private;
104
Linus Torvalds1da177e2005-04-16 15:20:36 -0700105 kbtab->irq->dev = kbtab->usbdev;
Dmitry Torokhov65cde542005-05-29 02:29:38 -0500106 if (usb_submit_urb(kbtab->irq, GFP_KERNEL))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700107 return -EIO;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700108
109 return 0;
110}
111
112static void kbtab_close(struct input_dev *dev)
113{
114 struct kbtab *kbtab = dev->private;
115
Dmitry Torokhov65cde542005-05-29 02:29:38 -0500116 usb_kill_urb(kbtab->irq);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700117}
118
119static int kbtab_probe(struct usb_interface *intf, const struct usb_device_id *id)
120{
121 struct usb_device *dev = interface_to_usbdev(intf);
122 struct usb_endpoint_descriptor *endpoint;
123 struct kbtab *kbtab;
Dmitry Torokhovc5b7c7c2005-09-15 02:01:47 -0500124 struct input_dev *input_dev;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700125
Dmitry Torokhovc5b7c7c2005-09-15 02:01:47 -0500126 kbtab = kzalloc(sizeof(struct kbtab), GFP_KERNEL);
127 input_dev = input_allocate_device();
128 if (!kbtab || !input_dev)
129 goto fail1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700130
131 kbtab->data = usb_buffer_alloc(dev, 8, GFP_KERNEL, &kbtab->data_dma);
Dmitry Torokhovc5b7c7c2005-09-15 02:01:47 -0500132 if (!kbtab->data)
133 goto fail1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700134
135 kbtab->irq = usb_alloc_urb(0, GFP_KERNEL);
Dmitry Torokhovc5b7c7c2005-09-15 02:01:47 -0500136 if (!kbtab->irq)
137 goto fail2;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700138
Linus Torvalds1da177e2005-04-16 15:20:36 -0700139 kbtab->usbdev = dev;
Dmitry Torokhovc5b7c7c2005-09-15 02:01:47 -0500140 kbtab->dev = input_dev;
141
142 usb_make_path(dev, kbtab->phys, sizeof(kbtab->phys));
143 strlcat(kbtab->phys, "/input0", sizeof(kbtab->phys));
144
145 input_dev->name = "KB Gear Tablet";
146 input_dev->phys = kbtab->phys;
147 usb_to_input_id(dev, &input_dev->id);
148 input_dev->cdev.dev = &intf->dev;
149 input_dev->private = kbtab;
150
151 input_dev->open = kbtab_open;
152 input_dev->close = kbtab_close;
153
154 input_dev->evbit[0] |= BIT(EV_KEY) | BIT(EV_ABS) | BIT(EV_MSC);
155 input_dev->keybit[LONG(BTN_LEFT)] |= BIT(BTN_LEFT) | BIT(BTN_RIGHT) | BIT(BTN_MIDDLE);
156 input_dev->keybit[LONG(BTN_DIGI)] |= BIT(BTN_TOOL_PEN) | BIT(BTN_TOUCH);
157 input_dev->mscbit[0] |= BIT(MSC_SERIAL);
158 input_set_abs_params(input_dev, ABS_X, 0, 0x2000, 4, 0);
Dmitry Torokhov19947542005-12-29 22:19:07 -0500159 input_set_abs_params(input_dev, ABS_Y, 0, 0x1750, 4, 0);
Dmitry Torokhovc5b7c7c2005-09-15 02:01:47 -0500160 input_set_abs_params(input_dev, ABS_PRESSURE, 0, 0xff, 0, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700161
162 endpoint = &intf->cur_altsetting->endpoint[0].desc;
163
164 usb_fill_int_urb(kbtab->irq, dev,
165 usb_rcvintpipe(dev, endpoint->bEndpointAddress),
166 kbtab->data, 8,
167 kbtab_irq, kbtab, endpoint->bInterval);
168 kbtab->irq->transfer_dma = kbtab->data_dma;
169 kbtab->irq->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
170
Dmitry Torokhovc5b7c7c2005-09-15 02:01:47 -0500171 input_register_device(kbtab->dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700172
173 usb_set_intfdata(intf, kbtab);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700174 return 0;
Dmitry Torokhovc5b7c7c2005-09-15 02:01:47 -0500175
176fail2: usb_buffer_free(dev, 10, kbtab->data, kbtab->data_dma);
177fail1: input_free_device(input_dev);
178 kfree(kbtab);
179 return -ENOMEM;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700180}
181
182static void kbtab_disconnect(struct usb_interface *intf)
183{
Dmitry Torokhovc5b7c7c2005-09-15 02:01:47 -0500184 struct kbtab *kbtab = usb_get_intfdata(intf);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700185
186 usb_set_intfdata(intf, NULL);
187 if (kbtab) {
188 usb_kill_urb(kbtab->irq);
Dmitry Torokhovc5b7c7c2005-09-15 02:01:47 -0500189 input_unregister_device(kbtab->dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700190 usb_free_urb(kbtab->irq);
191 usb_buffer_free(interface_to_usbdev(intf), 10, kbtab->data, kbtab->data_dma);
192 kfree(kbtab);
193 }
194}
195
196static struct usb_driver kbtab_driver = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700197 .name = "kbtab",
198 .probe = kbtab_probe,
199 .disconnect = kbtab_disconnect,
200 .id_table = kbtab_ids,
201};
202
203static int __init kbtab_init(void)
204{
205 int retval;
206 retval = usb_register(&kbtab_driver);
207 if (retval)
208 goto out;
209 info(DRIVER_VERSION ":" DRIVER_DESC);
210out:
211 return retval;
212}
213
214static void __exit kbtab_exit(void)
215{
216 usb_deregister(&kbtab_driver);
217}
218
219module_init(kbtab_init);
220module_exit(kbtab_exit);