blob: 85a5b40333ac3a347e5d901ec9ac413306310bcb [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 {
Dmitry Torokhov4ee1fc82007-05-03 00:54:54 -040032 unsigned char *data;
Linus Torvalds1da177e2005-04-16 15:20:36 -070033 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 char phys[32];
38};
39
David Howells7d12e782006-10-05 14:55:46 +010040static void kbtab_irq(struct urb *urb)
Linus Torvalds1da177e2005-04-16 15:20:36 -070041{
42 struct kbtab *kbtab = urb->context;
43 unsigned char *data = kbtab->data;
Dmitry Torokhovc5b7c7c2005-09-15 02:01:47 -050044 struct input_dev *dev = kbtab->dev;
Dmitry Torokhovf3192092010-04-20 22:15:44 -070045 int pressure;
Linus Torvalds1da177e2005-04-16 15:20:36 -070046 int retval;
47
48 switch (urb->status) {
49 case 0:
50 /* success */
51 break;
52 case -ECONNRESET:
53 case -ENOENT:
54 case -ESHUTDOWN:
55 /* this urb is terminated, clean up */
Harvey Harrisonea3e6c52008-05-05 11:36:18 -040056 dbg("%s - urb shutting down with status: %d", __func__, urb->status);
Linus Torvalds1da177e2005-04-16 15:20:36 -070057 return;
58 default:
Harvey Harrisonea3e6c52008-05-05 11:36:18 -040059 dbg("%s - nonzero urb status received: %d", __func__, urb->status);
Linus Torvalds1da177e2005-04-16 15:20:36 -070060 goto exit;
61 }
62
Linus Torvalds1da177e2005-04-16 15:20:36 -070063
64 input_report_key(dev, BTN_TOOL_PEN, 1);
65
Dmitry Torokhovf3192092010-04-20 22:15:44 -070066 input_report_abs(dev, ABS_X, get_unaligned_le16(&data[1]));
67 input_report_abs(dev, ABS_Y, get_unaligned_le16(&data[3]));
Linus Torvalds1da177e2005-04-16 15:20:36 -070068
69 /*input_report_key(dev, BTN_TOUCH , data[0] & 0x01);*/
70 input_report_key(dev, BTN_RIGHT, data[0] & 0x02);
71
Dmitry Torokhovf3192092010-04-20 22:15:44 -070072 pressure = data[5];
73 if (kb_pressure_click == -1)
74 input_report_abs(dev, ABS_PRESSURE, pressure);
75 else
76 input_report_key(dev, BTN_LEFT, pressure > kb_pressure_click ? 1 : 0);
Dmitry Torokhov05f091ab2005-05-29 02:29:01 -050077
Linus Torvalds1da177e2005-04-16 15:20:36 -070078 input_sync(dev);
79
80 exit:
Dmitry Torokhovf3192092010-04-20 22:15:44 -070081 retval = usb_submit_urb(urb, GFP_ATOMIC);
Linus Torvalds1da177e2005-04-16 15:20:36 -070082 if (retval)
Dmitry Torokhovf3192092010-04-20 22:15:44 -070083 err("%s - usb_submit_urb failed with result %d",
Harvey Harrisonea3e6c52008-05-05 11:36:18 -040084 __func__, retval);
Linus Torvalds1da177e2005-04-16 15:20:36 -070085}
86
87static struct usb_device_id kbtab_ids[] = {
88 { USB_DEVICE(USB_VENDOR_ID_KBGEAR, 0x1001), .driver_info = 0 },
89 { }
90};
91
92MODULE_DEVICE_TABLE(usb, kbtab_ids);
93
94static int kbtab_open(struct input_dev *dev)
95{
Dmitry Torokhov7791bda2007-04-12 01:34:39 -040096 struct kbtab *kbtab = input_get_drvdata(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -070097
Linus Torvalds1da177e2005-04-16 15:20:36 -070098 kbtab->irq->dev = kbtab->usbdev;
Dmitry Torokhov65cde542005-05-29 02:29:38 -050099 if (usb_submit_urb(kbtab->irq, GFP_KERNEL))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700100 return -EIO;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700101
102 return 0;
103}
104
105static void kbtab_close(struct input_dev *dev)
106{
Dmitry Torokhov7791bda2007-04-12 01:34:39 -0400107 struct kbtab *kbtab = input_get_drvdata(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700108
Dmitry Torokhov65cde542005-05-29 02:29:38 -0500109 usb_kill_urb(kbtab->irq);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700110}
111
112static int kbtab_probe(struct usb_interface *intf, const struct usb_device_id *id)
113{
114 struct usb_device *dev = interface_to_usbdev(intf);
115 struct usb_endpoint_descriptor *endpoint;
116 struct kbtab *kbtab;
Dmitry Torokhovc5b7c7c2005-09-15 02:01:47 -0500117 struct input_dev *input_dev;
Dmitry Torokhov50141862007-04-12 01:33:39 -0400118 int error = -ENOMEM;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700119
Dmitry Torokhovc5b7c7c2005-09-15 02:01:47 -0500120 kbtab = kzalloc(sizeof(struct kbtab), GFP_KERNEL);
121 input_dev = input_allocate_device();
122 if (!kbtab || !input_dev)
123 goto fail1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700124
Daniel Mack997ea582010-04-12 13:17:25 +0200125 kbtab->data = usb_alloc_coherent(dev, 8, GFP_KERNEL, &kbtab->data_dma);
Dmitry Torokhovc5b7c7c2005-09-15 02:01:47 -0500126 if (!kbtab->data)
127 goto fail1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700128
129 kbtab->irq = usb_alloc_urb(0, GFP_KERNEL);
Dmitry Torokhovc5b7c7c2005-09-15 02:01:47 -0500130 if (!kbtab->irq)
131 goto fail2;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700132
Linus Torvalds1da177e2005-04-16 15:20:36 -0700133 kbtab->usbdev = dev;
Dmitry Torokhovc5b7c7c2005-09-15 02:01:47 -0500134 kbtab->dev = input_dev;
135
136 usb_make_path(dev, kbtab->phys, sizeof(kbtab->phys));
137 strlcat(kbtab->phys, "/input0", sizeof(kbtab->phys));
138
139 input_dev->name = "KB Gear Tablet";
140 input_dev->phys = kbtab->phys;
141 usb_to_input_id(dev, &input_dev->id);
Dmitry Torokhovc0f82d52007-04-12 01:35:03 -0400142 input_dev->dev.parent = &intf->dev;
Dmitry Torokhov7791bda2007-04-12 01:34:39 -0400143
144 input_set_drvdata(input_dev, kbtab);
Dmitry Torokhovc5b7c7c2005-09-15 02:01:47 -0500145
146 input_dev->open = kbtab_open;
147 input_dev->close = kbtab_close;
148
Dmitry Torokhovf3192092010-04-20 22:15:44 -0700149 input_dev->evbit[0] |= BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);
150 input_dev->keybit[BIT_WORD(BTN_LEFT)] |=
151 BIT_MASK(BTN_LEFT) | BIT_MASK(BTN_RIGHT);
152 input_dev->keybit[BIT_WORD(BTN_DIGI)] |=
153 BIT_MASK(BTN_TOOL_PEN) | BIT_MASK(BTN_TOUCH);
Dmitry Torokhovc5b7c7c2005-09-15 02:01:47 -0500154 input_set_abs_params(input_dev, ABS_X, 0, 0x2000, 4, 0);
Dmitry Torokhov19947542005-12-29 22:19:07 -0500155 input_set_abs_params(input_dev, ABS_Y, 0, 0x1750, 4, 0);
Dmitry Torokhovc5b7c7c2005-09-15 02:01:47 -0500156 input_set_abs_params(input_dev, ABS_PRESSURE, 0, 0xff, 0, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700157
158 endpoint = &intf->cur_altsetting->endpoint[0].desc;
159
160 usb_fill_int_urb(kbtab->irq, dev,
161 usb_rcvintpipe(dev, endpoint->bEndpointAddress),
162 kbtab->data, 8,
163 kbtab_irq, kbtab, endpoint->bInterval);
164 kbtab->irq->transfer_dma = kbtab->data_dma;
165 kbtab->irq->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
166
Dmitry Torokhov50141862007-04-12 01:33:39 -0400167 error = input_register_device(kbtab->dev);
168 if (error)
169 goto fail3;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700170
171 usb_set_intfdata(intf, kbtab);
Dmitry Torokhov50141862007-04-12 01:33:39 -0400172
Linus Torvalds1da177e2005-04-16 15:20:36 -0700173 return 0;
Dmitry Torokhovc5b7c7c2005-09-15 02:01:47 -0500174
Dmitry Torokhov50141862007-04-12 01:33:39 -0400175 fail3: usb_free_urb(kbtab->irq);
Linus Torvalds7a9b1492010-05-20 21:26:12 -0700176 fail2: usb_free_coherent(dev, 8, kbtab->data, kbtab->data_dma);
Dmitry Torokhov50141862007-04-12 01:33:39 -0400177 fail1: input_free_device(input_dev);
Dmitry Torokhovc5b7c7c2005-09-15 02:01:47 -0500178 kfree(kbtab);
Dmitry Torokhov50141862007-04-12 01:33:39 -0400179 return error;
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);
Dmitry Torokhov331cb022010-04-20 22:06:53 -0700187
188 input_unregister_device(kbtab->dev);
189 usb_free_urb(kbtab->irq);
Linus Torvalds7a9b1492010-05-20 21:26:12 -0700190 usb_free_coherent(kbtab->usbdev, 8, kbtab->data, kbtab->data_dma);
Dmitry Torokhov331cb022010-04-20 22:06:53 -0700191 kfree(kbtab);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700192}
193
194static struct usb_driver kbtab_driver = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700195 .name = "kbtab",
196 .probe = kbtab_probe,
197 .disconnect = kbtab_disconnect,
198 .id_table = kbtab_ids,
199};
200
Greg Kroah-Hartman08642e72011-11-18 09:48:31 -0800201module_usb_driver(kbtab_driver);