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846 giacomo 1
/*
2
 * $Id: usbkbd.c,v 1.1 2004-09-13 15:04:47 giacomo Exp $
3
 *
4
 *  Copyright (c) 1999-2001 Vojtech Pavlik
5
 *
6
 *  USB HIDBP Keyboard support
7
 */
8
 
9
/*
10
 * This program is free software; you can redistribute it and/or modify
11
 * it under the terms of the GNU General Public License as published by
12
 * the Free Software Foundation; either version 2 of the License, or
13
 * (at your option) any later version.
14
 *
15
 * This program is distributed in the hope that it will be useful,
16
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
18
 * GNU General Public License for more details.
19
 *
20
 * You should have received a copy of the GNU General Public License
21
 * along with this program; if not, write to the Free Software
22
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23
 *
24
 * Should you need to contact me, the author, you can do so either by
25
 * e-mail - mail your message to <vojtech@ucw.cz>, or by paper mail:
26
 * Vojtech Pavlik, Simunkova 1594, Prague 8, 182 00 Czech Republic
27
 */
28
 
29
#include <linux/kernel.h>
30
#include <linux/slab.h>
31
#include <linux/module.h>
32
#include <linux/input.h>
33
#include <linux/init.h>
34
#include <linux/usb.h>
35
 
36
/*
37
 * Version Information
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
 
44
MODULE_AUTHOR(DRIVER_AUTHOR);
45
MODULE_DESCRIPTION(DRIVER_DESC);
46
MODULE_LICENSE(DRIVER_LICENSE);
47
 
48
static 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, 84, 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, 85, 89, 90, 91, 92, 93, 94, 95,
56
        120,121,122,123,134,138,130,132,128,129,131,137,133,135,136,113,
57
        115,114,  0,  0,  0,124,  0,181,182,183,184,185,186,187,188,189,
58
        190,191,192,193,194,195,196,197,198,  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
 
67
struct 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
        int open;
76
 
77
        unsigned char *new;
78
        struct usb_ctrlrequest *cr;
79
        unsigned char *leds;
80
        dma_addr_t cr_dma;
81
        dma_addr_t new_dma;
82
        dma_addr_t leds_dma;
83
};
84
 
85
static void usb_kbd_irq(struct urb *urb, struct pt_regs *regs)
86
{
87
        struct usb_kbd *kbd = urb->context;
88
        int i;
89
 
90
        switch (urb->status) {
91
        case 0:                 /* success */
92
                break;
93
        case -ECONNRESET:       /* unlink */
94
        case -ENOENT:
95
        case -ESHUTDOWN:
96
                return;
97
        /* -EPIPE:  should clear the halt */
98
        default:                /* error */
99
                goto resubmit;
100
        }
101
 
102
        input_regs(&kbd->dev, regs);
103
 
104
        for (i = 0; i < 8; i++)
105
                input_report_key(&kbd->dev, usb_kbd_keycode[i + 224], (kbd->new[0] >> i) & 1);
106
 
107
        for (i = 2; i < 8; i++) {
108
 
109
                if (kbd->old[i] > 3 && memscan(kbd->new + 2, kbd->old[i], 6) == kbd->new + 8) {
110
                        if (usb_kbd_keycode[kbd->old[i]])
111
                                input_report_key(&kbd->dev, usb_kbd_keycode[kbd->old[i]], 0);
112
                        else
113
                                info("Unknown key (scancode %#x) released.", kbd->old[i]);
114
                }
115
 
116
                if (kbd->new[i] > 3 && memscan(kbd->old + 2, kbd->new[i], 6) == kbd->old + 8) {
117
                        if (usb_kbd_keycode[kbd->new[i]])
118
                                input_report_key(&kbd->dev, usb_kbd_keycode[kbd->new[i]], 1);
119
                        else
120
                                info("Unknown key (scancode %#x) pressed.", kbd->new[i]);
121
                }
122
        }
123
 
124
        input_sync(&kbd->dev);
125
 
126
        memcpy(kbd->old, kbd->new, 8);
127
 
128
resubmit:
129
        i = usb_submit_urb (urb, SLAB_ATOMIC);
130
        if (i)
131
                err ("can't resubmit intr, %s-%s/input0, status %d",
132
                                kbd->usbdev->bus->bus_name,
133
                                kbd->usbdev->devpath, i);
134
}
135
 
136
int usb_kbd_event(struct input_dev *dev, unsigned int type, unsigned int code, int value)
137
{
138
        struct usb_kbd *kbd = dev->private;
139
 
140
        if (type != EV_LED)
141
                return -1;
142
 
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
                err("usb_submit_urb(leds) failed");
158
 
159
        return 0;
160
}
161
 
162
static void usb_kbd_led(struct urb *urb, struct pt_regs *regs)
163
{
164
        struct usb_kbd *kbd = urb->context;
165
 
166
        if (urb->status)
167
                warn("led urb status %d received", urb->status);
168
 
169
        if (*(kbd->leds) == kbd->newleds)
170
                return;
171
 
172
        *(kbd->leds) = kbd->newleds;
173
        kbd->led->dev = kbd->usbdev;
174
        if (usb_submit_urb(kbd->led, GFP_ATOMIC))
175
                err("usb_submit_urb(leds) failed");
176
}
177
 
178
static int usb_kbd_open(struct input_dev *dev)
179
{
180
        struct usb_kbd *kbd = dev->private;
181
 
182
        if (kbd->open++)
183
                return 0;
184
 
185
        kbd->irq->dev = kbd->usbdev;
186
        if (usb_submit_urb(kbd->irq, GFP_KERNEL)) {
187
                kbd->open--;
188
                return -EIO;
189
        }
190
 
191
        return 0;
192
}
193
 
194
static void usb_kbd_close(struct input_dev *dev)
195
{
196
        struct usb_kbd *kbd = dev->private;
197
 
198
        if (!--kbd->open)
199
                usb_unlink_urb(kbd->irq);
200
}
201
 
202
static int usb_kbd_alloc_mem(struct usb_device *dev, struct usb_kbd *kbd)
203
{
204
        if (!(kbd->irq = usb_alloc_urb(0, GFP_KERNEL)))
205
                return -1;
206
        if (!(kbd->led = usb_alloc_urb(0, GFP_KERNEL)))
207
                return -1;
208
        if (!(kbd->new = usb_buffer_alloc(dev, 8, SLAB_ATOMIC, &kbd->new_dma)))
209
                return -1;
210
        if (!(kbd->cr = usb_buffer_alloc(dev, sizeof(struct usb_ctrlrequest), SLAB_ATOMIC, &kbd->cr_dma)))
211
                return -1;
212
        if (!(kbd->leds = usb_buffer_alloc(dev, 1, SLAB_ATOMIC, &kbd->leds_dma)))
213
                return -1;
214
 
215
        return 0;
216
}
217
 
218
static void usb_kbd_free_mem(struct usb_device *dev, struct usb_kbd *kbd)
219
{
220
        if (kbd->irq)
221
                usb_free_urb(kbd->irq);
222
        if (kbd->led)
223
                usb_free_urb(kbd->led);
224
        if (kbd->new)
225
                usb_buffer_free(dev, 8, kbd->new, kbd->new_dma);
226
        if (kbd->cr)
227
                usb_buffer_free(dev, sizeof(struct usb_ctrlrequest), kbd->cr, kbd->cr_dma);
228
        if (kbd->leds)
229
                usb_buffer_free(dev, 1, kbd->leds, kbd->leds_dma);
230
}
231
 
232
static int usb_kbd_probe(struct usb_interface *iface,
233
                         const struct usb_device_id *id)
234
{
235
        struct usb_device * dev = interface_to_usbdev(iface);
236
        struct usb_host_interface *interface;
237
        struct usb_endpoint_descriptor *endpoint;
238
        struct usb_kbd *kbd;
239
        int i, pipe, maxp;
240
        char path[64];
241
        char *buf;
242
 
243
        interface = &iface->altsetting[iface->act_altsetting];
244
 
245
        if (interface->desc.bNumEndpoints != 1)
246
                return -ENODEV;
247
 
248
        endpoint = &interface->endpoint[0].desc;
249
        if (!(endpoint->bEndpointAddress & 0x80))
250
                return -ENODEV;
251
        if ((endpoint->bmAttributes & 3) != 3)
252
                return -ENODEV;
253
 
254
        pipe = usb_rcvintpipe(dev, endpoint->bEndpointAddress);
255
        maxp = usb_maxpacket(dev, pipe, usb_pipeout(pipe));
256
 
257
        if (!(kbd = kmalloc(sizeof(struct usb_kbd), GFP_KERNEL)))
258
                return -ENOMEM;
259
        memset(kbd, 0, sizeof(struct usb_kbd));
260
 
261
        if (usb_kbd_alloc_mem(dev, kbd)) {
262
                usb_kbd_free_mem(dev, kbd);
263
                kfree(kbd);
264
                return -ENOMEM;
265
        }
266
 
267
        kbd->usbdev = dev;
268
 
269
        kbd->dev.evbit[0] = BIT(EV_KEY) | BIT(EV_LED) | BIT(EV_REP);
270
        kbd->dev.ledbit[0] = BIT(LED_NUML) | BIT(LED_CAPSL) | BIT(LED_SCROLLL) | BIT(LED_COMPOSE) | BIT(LED_KANA);
271
 
272
        for (i = 0; i < 255; i++)
273
                set_bit(usb_kbd_keycode[i], kbd->dev.keybit);
274
        clear_bit(0, kbd->dev.keybit);
275
 
276
        kbd->dev.private = kbd;
277
        kbd->dev.event = usb_kbd_event;
278
        kbd->dev.open = usb_kbd_open;
279
        kbd->dev.close = usb_kbd_close;
280
 
281
        usb_fill_int_urb(kbd->irq, dev, pipe,
282
                         kbd->new, (maxp > 8 ? 8 : maxp),
283
                         usb_kbd_irq, kbd, endpoint->bInterval);
284
        kbd->irq->transfer_dma = kbd->new_dma;
285
        kbd->irq->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
286
 
287
        kbd->cr->bRequestType = USB_TYPE_CLASS | USB_RECIP_INTERFACE;
288
        kbd->cr->bRequest = 0x09;
289
        kbd->cr->wValue = cpu_to_le16(0x200);
290
        kbd->cr->wIndex = cpu_to_le16(interface->desc.bInterfaceNumber);
291
        kbd->cr->wLength = cpu_to_le16(1);
292
 
293
        usb_make_path(dev, path, 64);
294
        sprintf26(kbd->phys, "%s/input0", path);
295
 
296
        kbd->dev.name = kbd->name;
297
        kbd->dev.phys = kbd->phys;     
298
        kbd->dev.id.bustype = BUS_USB;
299
        kbd->dev.id.vendor = dev->descriptor.idVendor;
300
        kbd->dev.id.product = dev->descriptor.idProduct;
301
        kbd->dev.id.version = dev->descriptor.bcdDevice;
302
 
303
        if (!(buf = kmalloc(63, GFP_KERNEL))) {
304
                usb_free_urb(kbd->irq);
305
                usb_kbd_free_mem(dev, kbd);
306
                kfree(kbd);
307
                return -ENOMEM;
308
        }
309
 
310
        if (dev->descriptor.iManufacturer &&
311
                usb_string(dev, dev->descriptor.iManufacturer, buf, 63) > 0)
312
                        strcat(kbd->name, buf);
313
        if (dev->descriptor.iProduct &&
314
                usb_string(dev, dev->descriptor.iProduct, buf, 63) > 0)
315
                        sprintf26(kbd->name, "%s %s", kbd->name, buf);
316
 
317
        if (!strlen(kbd->name))
318
                sprintf26(kbd->name, "USB HIDBP Keyboard %04x:%04x",
319
                        kbd->dev.id.vendor, kbd->dev.id.product);
320
 
321
        kfree(buf);
322
 
323
        usb_fill_control_urb(kbd->led, dev, usb_sndctrlpipe(dev, 0),
324
                             (void *) kbd->cr, kbd->leds, 1,
325
                             usb_kbd_led, kbd);
326
        kbd->led->setup_dma = kbd->cr_dma;
327
        kbd->led->transfer_dma = kbd->leds_dma;
328
        kbd->led->transfer_flags |= (URB_NO_TRANSFER_DMA_MAP
329
                                | URB_NO_SETUP_DMA_MAP);
330
 
331
        input_register_device(&kbd->dev);
332
 
333
        printk(KERN_INFO "input: %s on %s\n", kbd->name, path);
334
 
335
        usb_set_intfdata(iface, kbd);
336
        return 0;
337
}
338
 
339
static void usb_kbd_disconnect(struct usb_interface *intf)
340
{
341
        struct usb_kbd *kbd = usb_get_intfdata (intf);
342
 
343
        usb_set_intfdata(intf, NULL);
344
        if (kbd) {
345
                usb_unlink_urb(kbd->irq);
346
                input_unregister_device(&kbd->dev);
347
                usb_kbd_free_mem(interface_to_usbdev(intf), kbd);
348
                kfree(kbd);
349
        }
350
}
351
 
352
static struct usb_device_id usb_kbd_id_table [] = {
353
        { USB_INTERFACE_INFO(3, 1, 1) },
354
        { }                                             /* Terminating entry */
355
};
356
 
357
MODULE_DEVICE_TABLE (usb, usb_kbd_id_table);
358
 
359
static struct usb_driver usb_kbd_driver = {
360
        .owner =        THIS_MODULE,
361
        .name =         "usbkbd",
362
        .probe =        usb_kbd_probe,
363
        .disconnect =   usb_kbd_disconnect,
364
        .id_table =     usb_kbd_id_table,
365
};
366
 
367
/*static*/ int /*__init*/ usb_kbd_init(void)
368
{
369
        int result = usb_register(&usb_kbd_driver);
370
        if (result == 0)
371
                info(DRIVER_VERSION ":" DRIVER_DESC);
372
        return result;
373
}
374
 
375
/*static*/ void /*__exit*/ usb_kbd_exit(void)
376
{
377
        usb_deregister(&usb_kbd_driver);
378
}
379
 
380
module_init(usb_kbd_init);
381
module_exit(usb_kbd_exit);