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1da177e4 LT |
1 | #include <linux/kernel.h> |
2 | #include <linux/slab.h> | |
1da177e4 LT |
3 | #include <linux/module.h> |
4 | #include <linux/init.h> | |
ae0dadcf | 5 | #include <linux/usb/input.h> |
1da177e4 | 6 | #include <asm/unaligned.h> |
1da177e4 LT |
7 | |
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 | ||
21 | MODULE_AUTHOR(DRIVER_AUTHOR); | |
22 | MODULE_DESCRIPTION(DRIVER_DESC); | |
23 | MODULE_LICENSE(DRIVER_LICENSE); | |
24 | ||
25 | #define USB_VENDOR_ID_KBGEAR 0x084e | |
26 | ||
27 | static int kb_pressure_click = 0x10; | |
28 | module_param(kb_pressure_click, int, 0); | |
29 | MODULE_PARM_DESC(kb_pressure_click, "pressure threshold for clicks"); | |
30 | ||
31 | struct kbtab { | |
32 | signed char *data; | |
33 | dma_addr_t data_dma; | |
c5b7c7c3 | 34 | struct input_dev *dev; |
1da177e4 LT |
35 | struct usb_device *usbdev; |
36 | struct urb *irq; | |
1da177e4 LT |
37 | int x, y; |
38 | int button; | |
39 | int pressure; | |
40 | __u32 serial[2]; | |
41 | char phys[32]; | |
42 | }; | |
43 | ||
7d12e780 | 44 | static void kbtab_irq(struct urb *urb) |
1da177e4 LT |
45 | { |
46 | struct kbtab *kbtab = urb->context; | |
47 | unsigned char *data = kbtab->data; | |
c5b7c7c3 | 48 | struct input_dev *dev = kbtab->dev; |
1da177e4 LT |
49 | 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 | ||
05f091ab | 79 | if (-1 == kb_pressure_click) { |
1da177e4 LT |
80 | 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 | }; | |
05f091ab | 84 | |
1da177e4 LT |
85 | 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 | ||
94 | static struct usb_device_id kbtab_ids[] = { | |
95 | { USB_DEVICE(USB_VENDOR_ID_KBGEAR, 0x1001), .driver_info = 0 }, | |
96 | { } | |
97 | }; | |
98 | ||
99 | MODULE_DEVICE_TABLE(usb, kbtab_ids); | |
100 | ||
101 | static int kbtab_open(struct input_dev *dev) | |
102 | { | |
103 | struct kbtab *kbtab = dev->private; | |
104 | ||
1da177e4 | 105 | kbtab->irq->dev = kbtab->usbdev; |
65cde54b | 106 | if (usb_submit_urb(kbtab->irq, GFP_KERNEL)) |
1da177e4 | 107 | return -EIO; |
1da177e4 LT |
108 | |
109 | return 0; | |
110 | } | |
111 | ||
112 | static void kbtab_close(struct input_dev *dev) | |
113 | { | |
114 | struct kbtab *kbtab = dev->private; | |
115 | ||
65cde54b | 116 | usb_kill_urb(kbtab->irq); |
1da177e4 LT |
117 | } |
118 | ||
119 | static 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; | |
c5b7c7c3 | 124 | struct input_dev *input_dev; |
1da177e4 | 125 | |
c5b7c7c3 DT |
126 | kbtab = kzalloc(sizeof(struct kbtab), GFP_KERNEL); |
127 | input_dev = input_allocate_device(); | |
128 | if (!kbtab || !input_dev) | |
129 | goto fail1; | |
1da177e4 LT |
130 | |
131 | kbtab->data = usb_buffer_alloc(dev, 8, GFP_KERNEL, &kbtab->data_dma); | |
c5b7c7c3 DT |
132 | if (!kbtab->data) |
133 | goto fail1; | |
1da177e4 LT |
134 | |
135 | kbtab->irq = usb_alloc_urb(0, GFP_KERNEL); | |
c5b7c7c3 DT |
136 | if (!kbtab->irq) |
137 | goto fail2; | |
1da177e4 | 138 | |
c5b7c7c3 DT |
139 | kbtab->usbdev = dev; |
140 | kbtab->dev = input_dev; | |
05f091ab | 141 | |
c5b7c7c3 DT |
142 | usb_make_path(dev, kbtab->phys, sizeof(kbtab->phys)); |
143 | strlcat(kbtab->phys, "/input0", sizeof(kbtab->phys)); | |
1da177e4 | 144 | |
c5b7c7c3 DT |
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; | |
1da177e4 | 150 | |
c5b7c7c3 DT |
151 | input_dev->open = kbtab_open; |
152 | input_dev->close = kbtab_close; | |
1da177e4 | 153 | |
c5b7c7c3 DT |
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); | |
19947544 | 159 | input_set_abs_params(input_dev, ABS_Y, 0, 0x1750, 4, 0); |
c5b7c7c3 | 160 | input_set_abs_params(input_dev, ABS_PRESSURE, 0, 0xff, 0, 0); |
1da177e4 LT |
161 | |
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 | ||
c5b7c7c3 | 171 | input_register_device(kbtab->dev); |
1da177e4 LT |
172 | |
173 | usb_set_intfdata(intf, kbtab); | |
1da177e4 | 174 | return 0; |
c5b7c7c3 DT |
175 | |
176 | fail2: usb_buffer_free(dev, 10, kbtab->data, kbtab->data_dma); | |
177 | fail1: input_free_device(input_dev); | |
178 | kfree(kbtab); | |
179 | return -ENOMEM; | |
1da177e4 LT |
180 | } |
181 | ||
182 | static void kbtab_disconnect(struct usb_interface *intf) | |
183 | { | |
c5b7c7c3 | 184 | struct kbtab *kbtab = usb_get_intfdata(intf); |
1da177e4 LT |
185 | |
186 | usb_set_intfdata(intf, NULL); | |
187 | if (kbtab) { | |
188 | usb_kill_urb(kbtab->irq); | |
c5b7c7c3 | 189 | input_unregister_device(kbtab->dev); |
1da177e4 LT |
190 | 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 | ||
196 | static struct usb_driver kbtab_driver = { | |
1da177e4 LT |
197 | .name = "kbtab", |
198 | .probe = kbtab_probe, | |
199 | .disconnect = kbtab_disconnect, | |
200 | .id_table = kbtab_ids, | |
201 | }; | |
202 | ||
203 | static 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); | |
210 | out: | |
211 | return retval; | |
212 | } | |
213 | ||
214 | static void __exit kbtab_exit(void) | |
215 | { | |
216 | usb_deregister(&kbtab_driver); | |
217 | } | |
218 | ||
219 | module_init(kbtab_init); | |
220 | module_exit(kbtab_exit); |