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1da177e4 LT |
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> | |
6 | #include <linux/usb.h> | |
7 | #include <asm/unaligned.h> | |
8 | #include <asm/byteorder.h> | |
9 | ||
10 | /* | |
11 | * Version Information | |
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> | |
16 | */ | |
17 | ||
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" | |
22 | ||
23 | MODULE_AUTHOR(DRIVER_AUTHOR); | |
24 | MODULE_DESCRIPTION(DRIVER_DESC); | |
25 | MODULE_LICENSE(DRIVER_LICENSE); | |
26 | ||
27 | #define USB_VENDOR_ID_KBGEAR 0x084e | |
28 | ||
29 | static int kb_pressure_click = 0x10; | |
30 | module_param(kb_pressure_click, int, 0); | |
31 | MODULE_PARM_DESC(kb_pressure_click, "pressure threshold for clicks"); | |
32 | ||
33 | struct kbtab { | |
34 | signed char *data; | |
35 | dma_addr_t data_dma; | |
36 | struct input_dev dev; | |
37 | struct usb_device *usbdev; | |
38 | struct urb *irq; | |
39 | int open; | |
40 | int x, y; | |
41 | int button; | |
42 | int pressure; | |
43 | __u32 serial[2]; | |
44 | char phys[32]; | |
45 | }; | |
46 | ||
47 | static void kbtab_irq(struct urb *urb, struct pt_regs *regs) | |
48 | { | |
49 | struct kbtab *kbtab = urb->context; | |
50 | unsigned char *data = kbtab->data; | |
51 | struct input_dev *dev = &kbtab->dev; | |
52 | int retval; | |
53 | ||
54 | switch (urb->status) { | |
55 | case 0: | |
56 | /* success */ | |
57 | break; | |
58 | case -ECONNRESET: | |
59 | case -ENOENT: | |
60 | case -ESHUTDOWN: | |
61 | /* this urb is terminated, clean up */ | |
62 | dbg("%s - urb shutting down with status: %d", __FUNCTION__, urb->status); | |
63 | return; | |
64 | default: | |
65 | dbg("%s - nonzero urb status received: %d", __FUNCTION__, urb->status); | |
66 | goto exit; | |
67 | } | |
68 | ||
69 | kbtab->x = le16_to_cpu(get_unaligned((__le16 *) &data[1])); | |
70 | kbtab->y = le16_to_cpu(get_unaligned((__le16 *) &data[3])); | |
71 | ||
72 | kbtab->pressure = (data[5]); | |
73 | ||
74 | input_report_key(dev, BTN_TOOL_PEN, 1); | |
75 | ||
76 | input_report_abs(dev, ABS_X, kbtab->x); | |
77 | input_report_abs(dev, ABS_Y, kbtab->y); | |
78 | ||
79 | /*input_report_key(dev, BTN_TOUCH , data[0] & 0x01);*/ | |
80 | input_report_key(dev, BTN_RIGHT, data[0] & 0x02); | |
81 | ||
82 | if( -1 == kb_pressure_click){ | |
83 | input_report_abs(dev, ABS_PRESSURE, kbtab->pressure); | |
84 | } else { | |
85 | input_report_key(dev, BTN_LEFT, (kbtab->pressure > kb_pressure_click) ? 1 : 0); | |
86 | }; | |
87 | ||
88 | input_sync(dev); | |
89 | ||
90 | exit: | |
91 | retval = usb_submit_urb (urb, GFP_ATOMIC); | |
92 | if (retval) | |
93 | err ("%s - usb_submit_urb failed with result %d", | |
94 | __FUNCTION__, retval); | |
95 | } | |
96 | ||
97 | static struct usb_device_id kbtab_ids[] = { | |
98 | { USB_DEVICE(USB_VENDOR_ID_KBGEAR, 0x1001), .driver_info = 0 }, | |
99 | { } | |
100 | }; | |
101 | ||
102 | MODULE_DEVICE_TABLE(usb, kbtab_ids); | |
103 | ||
104 | static int kbtab_open(struct input_dev *dev) | |
105 | { | |
106 | struct kbtab *kbtab = dev->private; | |
107 | ||
108 | if (kbtab->open++) | |
109 | return 0; | |
110 | ||
111 | kbtab->irq->dev = kbtab->usbdev; | |
112 | if (usb_submit_urb(kbtab->irq, GFP_KERNEL)) { | |
113 | kbtab->open--; | |
114 | return -EIO; | |
115 | } | |
116 | ||
117 | return 0; | |
118 | } | |
119 | ||
120 | static void kbtab_close(struct input_dev *dev) | |
121 | { | |
122 | struct kbtab *kbtab = dev->private; | |
123 | ||
124 | if (!--kbtab->open) | |
125 | usb_kill_urb(kbtab->irq); | |
126 | } | |
127 | ||
128 | static int kbtab_probe(struct usb_interface *intf, const struct usb_device_id *id) | |
129 | { | |
130 | struct usb_device *dev = interface_to_usbdev(intf); | |
131 | struct usb_endpoint_descriptor *endpoint; | |
132 | struct kbtab *kbtab; | |
133 | char path[64]; | |
134 | ||
135 | if (!(kbtab = kmalloc(sizeof(struct kbtab), GFP_KERNEL))) | |
136 | return -ENOMEM; | |
137 | memset(kbtab, 0, sizeof(struct kbtab)); | |
138 | ||
139 | kbtab->data = usb_buffer_alloc(dev, 8, GFP_KERNEL, &kbtab->data_dma); | |
140 | if (!kbtab->data) { | |
141 | kfree(kbtab); | |
142 | return -ENOMEM; | |
143 | } | |
144 | ||
145 | kbtab->irq = usb_alloc_urb(0, GFP_KERNEL); | |
146 | if (!kbtab->irq) { | |
147 | usb_buffer_free(dev, 10, kbtab->data, kbtab->data_dma); | |
148 | kfree(kbtab); | |
149 | return -ENOMEM; | |
150 | } | |
151 | ||
152 | kbtab->dev.evbit[0] |= BIT(EV_KEY) | BIT(EV_ABS) | BIT(EV_MSC); | |
153 | kbtab->dev.absbit[0] |= BIT(ABS_X) | BIT(ABS_Y) | BIT(ABS_PRESSURE); | |
154 | ||
155 | kbtab->dev.keybit[LONG(BTN_LEFT)] |= BIT(BTN_LEFT) | BIT(BTN_RIGHT) | BIT(BTN_MIDDLE); | |
156 | ||
157 | kbtab->dev.keybit[LONG(BTN_DIGI)] |= BIT(BTN_TOOL_PEN) | BIT(BTN_TOUCH); | |
158 | ||
159 | kbtab->dev.mscbit[0] |= BIT(MSC_SERIAL); | |
160 | ||
161 | kbtab->dev.absmax[ABS_X] = 0x2000; | |
162 | kbtab->dev.absmax[ABS_Y] = 0x1750; | |
163 | kbtab->dev.absmax[ABS_PRESSURE] = 0xff; | |
164 | ||
165 | kbtab->dev.absfuzz[ABS_X] = 4; | |
166 | kbtab->dev.absfuzz[ABS_Y] = 4; | |
167 | ||
168 | kbtab->dev.private = kbtab; | |
169 | kbtab->dev.open = kbtab_open; | |
170 | kbtab->dev.close = kbtab_close; | |
171 | ||
172 | usb_make_path(dev, path, 64); | |
173 | sprintf(kbtab->phys, "%s/input0", path); | |
174 | ||
175 | kbtab->dev.name = "KB Gear Tablet"; | |
176 | kbtab->dev.phys = kbtab->phys; | |
177 | kbtab->dev.id.bustype = BUS_USB; | |
178 | kbtab->dev.id.vendor = le16_to_cpu(dev->descriptor.idVendor); | |
179 | kbtab->dev.id.product = le16_to_cpu(dev->descriptor.idProduct); | |
180 | kbtab->dev.id.version = le16_to_cpu(dev->descriptor.bcdDevice); | |
181 | kbtab->dev.dev = &intf->dev; | |
182 | kbtab->usbdev = dev; | |
183 | ||
184 | endpoint = &intf->cur_altsetting->endpoint[0].desc; | |
185 | ||
186 | usb_fill_int_urb(kbtab->irq, dev, | |
187 | usb_rcvintpipe(dev, endpoint->bEndpointAddress), | |
188 | kbtab->data, 8, | |
189 | kbtab_irq, kbtab, endpoint->bInterval); | |
190 | kbtab->irq->transfer_dma = kbtab->data_dma; | |
191 | kbtab->irq->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; | |
192 | ||
193 | input_register_device(&kbtab->dev); | |
194 | ||
195 | printk(KERN_INFO "input: KB Gear Tablet on %s\n", path); | |
196 | ||
197 | usb_set_intfdata(intf, kbtab); | |
198 | ||
199 | return 0; | |
200 | } | |
201 | ||
202 | static void kbtab_disconnect(struct usb_interface *intf) | |
203 | { | |
204 | struct kbtab *kbtab = usb_get_intfdata (intf); | |
205 | ||
206 | usb_set_intfdata(intf, NULL); | |
207 | if (kbtab) { | |
208 | usb_kill_urb(kbtab->irq); | |
209 | input_unregister_device(&kbtab->dev); | |
210 | usb_free_urb(kbtab->irq); | |
211 | usb_buffer_free(interface_to_usbdev(intf), 10, kbtab->data, kbtab->data_dma); | |
212 | kfree(kbtab); | |
213 | } | |
214 | } | |
215 | ||
216 | static struct usb_driver kbtab_driver = { | |
217 | .owner = THIS_MODULE, | |
218 | .name = "kbtab", | |
219 | .probe = kbtab_probe, | |
220 | .disconnect = kbtab_disconnect, | |
221 | .id_table = kbtab_ids, | |
222 | }; | |
223 | ||
224 | static int __init kbtab_init(void) | |
225 | { | |
226 | int retval; | |
227 | retval = usb_register(&kbtab_driver); | |
228 | if (retval) | |
229 | goto out; | |
230 | info(DRIVER_VERSION ":" DRIVER_DESC); | |
231 | out: | |
232 | return retval; | |
233 | } | |
234 | ||
235 | static void __exit kbtab_exit(void) | |
236 | { | |
237 | usb_deregister(&kbtab_driver); | |
238 | } | |
239 | ||
240 | module_init(kbtab_init); | |
241 | module_exit(kbtab_exit); |