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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 { | |
4ee1fc8e | 32 | unsigned char *data; |
1da177e4 | 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 | char phys[32]; |
38 | }; | |
39 | ||
7d12e780 | 40 | static void kbtab_irq(struct urb *urb) |
1da177e4 LT |
41 | { |
42 | struct kbtab *kbtab = urb->context; | |
43 | unsigned char *data = kbtab->data; | |
c5b7c7c3 | 44 | struct input_dev *dev = kbtab->dev; |
f3192090 | 45 | int pressure; |
1da177e4 LT |
46 | 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 */ | |
ea3e6c59 | 56 | dbg("%s - urb shutting down with status: %d", __func__, urb->status); |
1da177e4 LT |
57 | return; |
58 | default: | |
ea3e6c59 | 59 | dbg("%s - nonzero urb status received: %d", __func__, urb->status); |
1da177e4 LT |
60 | goto exit; |
61 | } | |
62 | ||
1da177e4 LT |
63 | |
64 | input_report_key(dev, BTN_TOOL_PEN, 1); | |
65 | ||
f3192090 DT |
66 | input_report_abs(dev, ABS_X, get_unaligned_le16(&data[1])); |
67 | input_report_abs(dev, ABS_Y, get_unaligned_le16(&data[3])); | |
1da177e4 LT |
68 | |
69 | /*input_report_key(dev, BTN_TOUCH , data[0] & 0x01);*/ | |
70 | input_report_key(dev, BTN_RIGHT, data[0] & 0x02); | |
71 | ||
f3192090 DT |
72 | 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); | |
05f091ab | 77 | |
1da177e4 LT |
78 | input_sync(dev); |
79 | ||
80 | exit: | |
f3192090 | 81 | retval = usb_submit_urb(urb, GFP_ATOMIC); |
1da177e4 | 82 | if (retval) |
f3192090 | 83 | err("%s - usb_submit_urb failed with result %d", |
ea3e6c59 | 84 | __func__, retval); |
1da177e4 LT |
85 | } |
86 | ||
87 | static struct usb_device_id kbtab_ids[] = { | |
88 | { USB_DEVICE(USB_VENDOR_ID_KBGEAR, 0x1001), .driver_info = 0 }, | |
89 | { } | |
90 | }; | |
91 | ||
92 | MODULE_DEVICE_TABLE(usb, kbtab_ids); | |
93 | ||
94 | static int kbtab_open(struct input_dev *dev) | |
95 | { | |
7791bdae | 96 | struct kbtab *kbtab = input_get_drvdata(dev); |
1da177e4 | 97 | |
1da177e4 | 98 | kbtab->irq->dev = kbtab->usbdev; |
65cde54b | 99 | if (usb_submit_urb(kbtab->irq, GFP_KERNEL)) |
1da177e4 | 100 | return -EIO; |
1da177e4 LT |
101 | |
102 | return 0; | |
103 | } | |
104 | ||
105 | static void kbtab_close(struct input_dev *dev) | |
106 | { | |
7791bdae | 107 | struct kbtab *kbtab = input_get_drvdata(dev); |
1da177e4 | 108 | |
65cde54b | 109 | usb_kill_urb(kbtab->irq); |
1da177e4 LT |
110 | } |
111 | ||
112 | static 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; | |
c5b7c7c3 | 117 | struct input_dev *input_dev; |
5014186d | 118 | int error = -ENOMEM; |
1da177e4 | 119 | |
c5b7c7c3 DT |
120 | kbtab = kzalloc(sizeof(struct kbtab), GFP_KERNEL); |
121 | input_dev = input_allocate_device(); | |
122 | if (!kbtab || !input_dev) | |
123 | goto fail1; | |
1da177e4 | 124 | |
997ea58e | 125 | kbtab->data = usb_alloc_coherent(dev, 8, GFP_KERNEL, &kbtab->data_dma); |
c5b7c7c3 DT |
126 | if (!kbtab->data) |
127 | goto fail1; | |
1da177e4 LT |
128 | |
129 | kbtab->irq = usb_alloc_urb(0, GFP_KERNEL); | |
c5b7c7c3 DT |
130 | if (!kbtab->irq) |
131 | goto fail2; | |
1da177e4 | 132 | |
c5b7c7c3 DT |
133 | kbtab->usbdev = dev; |
134 | kbtab->dev = input_dev; | |
05f091ab | 135 | |
c5b7c7c3 DT |
136 | usb_make_path(dev, kbtab->phys, sizeof(kbtab->phys)); |
137 | strlcat(kbtab->phys, "/input0", sizeof(kbtab->phys)); | |
1da177e4 | 138 | |
c5b7c7c3 DT |
139 | input_dev->name = "KB Gear Tablet"; |
140 | input_dev->phys = kbtab->phys; | |
141 | usb_to_input_id(dev, &input_dev->id); | |
c0f82d57 | 142 | input_dev->dev.parent = &intf->dev; |
7791bdae DT |
143 | |
144 | input_set_drvdata(input_dev, kbtab); | |
1da177e4 | 145 | |
c5b7c7c3 DT |
146 | input_dev->open = kbtab_open; |
147 | input_dev->close = kbtab_close; | |
1da177e4 | 148 | |
f3192090 DT |
149 | 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); | |
c5b7c7c3 | 154 | input_set_abs_params(input_dev, ABS_X, 0, 0x2000, 4, 0); |
19947544 | 155 | input_set_abs_params(input_dev, ABS_Y, 0, 0x1750, 4, 0); |
c5b7c7c3 | 156 | input_set_abs_params(input_dev, ABS_PRESSURE, 0, 0xff, 0, 0); |
1da177e4 LT |
157 | |
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 | ||
5014186d DT |
167 | error = input_register_device(kbtab->dev); |
168 | if (error) | |
169 | goto fail3; | |
1da177e4 LT |
170 | |
171 | usb_set_intfdata(intf, kbtab); | |
5014186d | 172 | |
1da177e4 | 173 | return 0; |
c5b7c7c3 | 174 | |
5014186d | 175 | fail3: usb_free_urb(kbtab->irq); |
7a9b1492 | 176 | fail2: usb_free_coherent(dev, 8, kbtab->data, kbtab->data_dma); |
5014186d | 177 | fail1: input_free_device(input_dev); |
c5b7c7c3 | 178 | kfree(kbtab); |
5014186d | 179 | return error; |
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); | |
331cb022 DT |
187 | |
188 | input_unregister_device(kbtab->dev); | |
189 | usb_free_urb(kbtab->irq); | |
7a9b1492 | 190 | usb_free_coherent(kbtab->usbdev, 8, kbtab->data, kbtab->data_dma); |
331cb022 | 191 | kfree(kbtab); |
1da177e4 LT |
192 | } |
193 | ||
194 | static struct usb_driver kbtab_driver = { | |
1da177e4 LT |
195 | .name = "kbtab", |
196 | .probe = kbtab_probe, | |
197 | .disconnect = kbtab_disconnect, | |
198 | .id_table = kbtab_ids, | |
199 | }; | |
200 | ||
201 | static int __init kbtab_init(void) | |
202 | { | |
203 | int retval; | |
204 | retval = usb_register(&kbtab_driver); | |
205 | if (retval) | |
206 | goto out; | |
899ef6e7 GKH |
207 | printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_VERSION ":" |
208 | DRIVER_DESC "\n"); | |
1da177e4 LT |
209 | out: |
210 | return retval; | |
211 | } | |
212 | ||
213 | static void __exit kbtab_exit(void) | |
214 | { | |
215 | usb_deregister(&kbtab_driver); | |
216 | } | |
217 | ||
218 | module_init(kbtab_init); | |
219 | module_exit(kbtab_exit); |