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26
27#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
28
29#include <linux/kernel.h>
30#include <linux/slab.h>
31#include <linux/module.h>
32#include <linux/init.h>
33#include <linux/usb/input.h>
34#include <linux/hid.h>
35
36
37
38
39#define DRIVER_VERSION ""
40#define DRIVER_AUTHOR "Vojtech Pavlik <vojtech@ucw.cz>"
41#define DRIVER_DESC "USB HID Boot Protocol keyboard driver"
42#define DRIVER_LICENSE "GPL"
43
44MODULE_AUTHOR(DRIVER_AUTHOR);
45MODULE_DESCRIPTION(DRIVER_DESC);
46MODULE_LICENSE(DRIVER_LICENSE);
47
48static const unsigned char usb_kbd_keycode[256] = {
49 0, 0, 0, 0, 30, 48, 46, 32, 18, 33, 34, 35, 23, 36, 37, 38,
50 50, 49, 24, 25, 16, 19, 31, 20, 22, 47, 17, 45, 21, 44, 2, 3,
51 4, 5, 6, 7, 8, 9, 10, 11, 28, 1, 14, 15, 57, 12, 13, 26,
52 27, 43, 43, 39, 40, 41, 51, 52, 53, 58, 59, 60, 61, 62, 63, 64,
53 65, 66, 67, 68, 87, 88, 99, 70,119,110,102,104,111,107,109,106,
54 105,108,103, 69, 98, 55, 74, 78, 96, 79, 80, 81, 75, 76, 77, 71,
55 72, 73, 82, 83, 86,127,116,117,183,184,185,186,187,188,189,190,
56 191,192,193,194,134,138,130,132,128,129,131,137,133,135,136,113,
57 115,114, 0, 0, 0,121, 0, 89, 93,124, 92, 94, 95, 0, 0, 0,
58 122,123, 90, 91, 85, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
59 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
60 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
61 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
62 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
63 29, 42, 56,125, 97, 54,100,126,164,166,165,163,161,115,114,113,
64 150,158,159,128,136,177,178,176,142,152,173,140
65};
66
67struct usb_kbd {
68 struct input_dev *dev;
69 struct usb_device *usbdev;
70 unsigned char old[8];
71 struct urb *irq, *led;
72 unsigned char newleds;
73 char name[128];
74 char phys[64];
75
76 unsigned char *new;
77 struct usb_ctrlrequest *cr;
78 unsigned char *leds;
79 dma_addr_t new_dma;
80 dma_addr_t leds_dma;
81};
82
83static void usb_kbd_irq(struct urb *urb)
84{
85 struct usb_kbd *kbd = urb->context;
86 int i;
87
88 switch (urb->status) {
89 case 0:
90 break;
91 case -ECONNRESET:
92 case -ENOENT:
93 case -ESHUTDOWN:
94 return;
95
96 default:
97 goto resubmit;
98 }
99
100 for (i = 0; i < 8; i++)
101 input_report_key(kbd->dev, usb_kbd_keycode[i + 224], (kbd->new[0] >> i) & 1);
102
103 for (i = 2; i < 8; i++) {
104
105 if (kbd->old[i] > 3 && memscan(kbd->new + 2, kbd->old[i], 6) == kbd->new + 8) {
106 if (usb_kbd_keycode[kbd->old[i]])
107 input_report_key(kbd->dev, usb_kbd_keycode[kbd->old[i]], 0);
108 else
109 hid_info(urb->dev,
110 "Unknown key (scancode %#x) released.\n",
111 kbd->old[i]);
112 }
113
114 if (kbd->new[i] > 3 && memscan(kbd->old + 2, kbd->new[i], 6) == kbd->old + 8) {
115 if (usb_kbd_keycode[kbd->new[i]])
116 input_report_key(kbd->dev, usb_kbd_keycode[kbd->new[i]], 1);
117 else
118 hid_info(urb->dev,
119 "Unknown key (scancode %#x) released.\n",
120 kbd->new[i]);
121 }
122 }
123
124 input_sync(kbd->dev);
125
126 memcpy(kbd->old, kbd->new, 8);
127
128resubmit:
129 i = usb_submit_urb (urb, GFP_ATOMIC);
130 if (i)
131 hid_err(urb->dev, "can't resubmit intr, %s-%s/input0, status %d",
132 kbd->usbdev->bus->bus_name,
133 kbd->usbdev->devpath, i);
134}
135
136static int usb_kbd_event(struct input_dev *dev, unsigned int type,
137 unsigned int code, int value)
138{
139 struct usb_kbd *kbd = input_get_drvdata(dev);
140
141 if (type != EV_LED)
142 return -1;
143
144 kbd->newleds = (!!test_bit(LED_KANA, dev->led) << 3) | (!!test_bit(LED_COMPOSE, dev->led) << 3) |
145 (!!test_bit(LED_SCROLLL, dev->led) << 2) | (!!test_bit(LED_CAPSL, dev->led) << 1) |
146 (!!test_bit(LED_NUML, dev->led));
147
148 if (kbd->led->status == -EINPROGRESS)
149 return 0;
150
151 if (*(kbd->leds) == kbd->newleds)
152 return 0;
153
154 *(kbd->leds) = kbd->newleds;
155 kbd->led->dev = kbd->usbdev;
156 if (usb_submit_urb(kbd->led, GFP_ATOMIC))
157 pr_err("usb_submit_urb(leds) failed\n");
158
159 return 0;
160}
161
162static void usb_kbd_led(struct urb *urb)
163{
164 struct usb_kbd *kbd = urb->context;
165
166 if (urb->status)
167 hid_warn(urb->dev, "led urb status %d received\n",
168 urb->status);
169
170 if (*(kbd->leds) == kbd->newleds)
171 return;
172
173 *(kbd->leds) = kbd->newleds;
174 kbd->led->dev = kbd->usbdev;
175 if (usb_submit_urb(kbd->led, GFP_ATOMIC))
176 hid_err(urb->dev, "usb_submit_urb(leds) failed\n");
177}
178
179static int usb_kbd_open(struct input_dev *dev)
180{
181 struct usb_kbd *kbd = input_get_drvdata(dev);
182
183 kbd->irq->dev = kbd->usbdev;
184 if (usb_submit_urb(kbd->irq, GFP_KERNEL))
185 return -EIO;
186
187 return 0;
188}
189
190static void usb_kbd_close(struct input_dev *dev)
191{
192 struct usb_kbd *kbd = input_get_drvdata(dev);
193
194 usb_kill_urb(kbd->irq);
195}
196
197static int usb_kbd_alloc_mem(struct usb_device *dev, struct usb_kbd *kbd)
198{
199 if (!(kbd->irq = usb_alloc_urb(0, GFP_KERNEL)))
200 return -1;
201 if (!(kbd->led = usb_alloc_urb(0, GFP_KERNEL)))
202 return -1;
203 if (!(kbd->new = usb_alloc_coherent(dev, 8, GFP_ATOMIC, &kbd->new_dma)))
204 return -1;
205 if (!(kbd->cr = kmalloc(sizeof(struct usb_ctrlrequest), GFP_KERNEL)))
206 return -1;
207 if (!(kbd->leds = usb_alloc_coherent(dev, 1, GFP_ATOMIC, &kbd->leds_dma)))
208 return -1;
209
210 return 0;
211}
212
213static void usb_kbd_free_mem(struct usb_device *dev, struct usb_kbd *kbd)
214{
215 usb_free_urb(kbd->irq);
216 usb_free_urb(kbd->led);
217 usb_free_coherent(dev, 8, kbd->new, kbd->new_dma);
218 kfree(kbd->cr);
219 usb_free_coherent(dev, 1, kbd->leds, kbd->leds_dma);
220}
221
222static int usb_kbd_probe(struct usb_interface *iface,
223 const struct usb_device_id *id)
224{
225 struct usb_device *dev = interface_to_usbdev(iface);
226 struct usb_host_interface *interface;
227 struct usb_endpoint_descriptor *endpoint;
228 struct usb_kbd *kbd;
229 struct input_dev *input_dev;
230 int i, pipe, maxp;
231 int error = -ENOMEM;
232
233 interface = iface->cur_altsetting;
234
235 if (interface->desc.bNumEndpoints != 1)
236 return -ENODEV;
237
238 endpoint = &interface->endpoint[0].desc;
239 if (!usb_endpoint_is_int_in(endpoint))
240 return -ENODEV;
241
242 pipe = usb_rcvintpipe(dev, endpoint->bEndpointAddress);
243 maxp = usb_maxpacket(dev, pipe, usb_pipeout(pipe));
244
245 kbd = kzalloc(sizeof(struct usb_kbd), GFP_KERNEL);
246 input_dev = input_allocate_device();
247 if (!kbd || !input_dev)
248 goto fail1;
249
250 if (usb_kbd_alloc_mem(dev, kbd))
251 goto fail2;
252
253 kbd->usbdev = dev;
254 kbd->dev = input_dev;
255
256 if (dev->manufacturer)
257 strlcpy(kbd->name, dev->manufacturer, sizeof(kbd->name));
258
259 if (dev->product) {
260 if (dev->manufacturer)
261 strlcat(kbd->name, " ", sizeof(kbd->name));
262 strlcat(kbd->name, dev->product, sizeof(kbd->name));
263 }
264
265 if (!strlen(kbd->name))
266 snprintf(kbd->name, sizeof(kbd->name),
267 "USB HIDBP Keyboard %04x:%04x",
268 le16_to_cpu(dev->descriptor.idVendor),
269 le16_to_cpu(dev->descriptor.idProduct));
270
271 usb_make_path(dev, kbd->phys, sizeof(kbd->phys));
272 strlcat(kbd->phys, "/input0", sizeof(kbd->phys));
273
274 input_dev->name = kbd->name;
275 input_dev->phys = kbd->phys;
276 usb_to_input_id(dev, &input_dev->id);
277 input_dev->dev.parent = &iface->dev;
278
279 input_set_drvdata(input_dev, kbd);
280
281 input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_LED) |
282 BIT_MASK(EV_REP);
283 input_dev->ledbit[0] = BIT_MASK(LED_NUML) | BIT_MASK(LED_CAPSL) |
284 BIT_MASK(LED_SCROLLL) | BIT_MASK(LED_COMPOSE) |
285 BIT_MASK(LED_KANA);
286
287 for (i = 0; i < 255; i++)
288 set_bit(usb_kbd_keycode[i], input_dev->keybit);
289 clear_bit(0, input_dev->keybit);
290
291 input_dev->event = usb_kbd_event;
292 input_dev->open = usb_kbd_open;
293 input_dev->close = usb_kbd_close;
294
295 usb_fill_int_urb(kbd->irq, dev, pipe,
296 kbd->new, (maxp > 8 ? 8 : maxp),
297 usb_kbd_irq, kbd, endpoint->bInterval);
298 kbd->irq->transfer_dma = kbd->new_dma;
299 kbd->irq->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
300
301 kbd->cr->bRequestType = USB_TYPE_CLASS | USB_RECIP_INTERFACE;
302 kbd->cr->bRequest = 0x09;
303 kbd->cr->wValue = cpu_to_le16(0x200);
304 kbd->cr->wIndex = cpu_to_le16(interface->desc.bInterfaceNumber);
305 kbd->cr->wLength = cpu_to_le16(1);
306
307 usb_fill_control_urb(kbd->led, dev, usb_sndctrlpipe(dev, 0),
308 (void *) kbd->cr, kbd->leds, 1,
309 usb_kbd_led, kbd);
310 kbd->led->transfer_dma = kbd->leds_dma;
311 kbd->led->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
312
313 error = input_register_device(kbd->dev);
314 if (error)
315 goto fail2;
316
317 usb_set_intfdata(iface, kbd);
318 device_set_wakeup_enable(&dev->dev, 1);
319 return 0;
320
321fail2:
322 usb_kbd_free_mem(dev, kbd);
323fail1:
324 input_free_device(input_dev);
325 kfree(kbd);
326 return error;
327}
328
329static void usb_kbd_disconnect(struct usb_interface *intf)
330{
331 struct usb_kbd *kbd = usb_get_intfdata (intf);
332
333 usb_set_intfdata(intf, NULL);
334 if (kbd) {
335 usb_kill_urb(kbd->irq);
336 input_unregister_device(kbd->dev);
337 usb_kbd_free_mem(interface_to_usbdev(intf), kbd);
338 kfree(kbd);
339 }
340}
341
342static struct usb_device_id usb_kbd_id_table [] = {
343 { USB_INTERFACE_INFO(USB_INTERFACE_CLASS_HID, USB_INTERFACE_SUBCLASS_BOOT,
344 USB_INTERFACE_PROTOCOL_KEYBOARD) },
345 { }
346};
347
348MODULE_DEVICE_TABLE (usb, usb_kbd_id_table);
349
350static struct usb_driver usb_kbd_driver = {
351 .name = "usbkbd",
352 .probe = usb_kbd_probe,
353 .disconnect = usb_kbd_disconnect,
354 .id_table = usb_kbd_id_table,
355};
356
357static int __init usb_kbd_init(void)
358{
359 int result = usb_register(&usb_kbd_driver);
360 if (result == 0)
361 printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_VERSION ":"
362 DRIVER_DESC "\n");
363 return result;
364}
365
366static void __exit usb_kbd_exit(void)
367{
368 usb_deregister(&usb_kbd_driver);
369}
370
371module_init(usb_kbd_init);
372module_exit(usb_kbd_exit);
373
