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