drivers/hid/usbhid/usbkbd.c

   1 /*
   2  *  Copyright (c) 1999-2001 Vojtech Pavlik
   3  *
   4  *  USB HIDBP Keyboard support
   5  */
   6
   7 /*
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License as published by
  10  * the Free Software Foundation; either version 2 of the License, or
  11  * (at your option) any later version.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  * GNU General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * along with this program; if not, write to the Free Software
  20  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  21  *
  22  * Should you need to contact me, the author, you can do so either by
  23  * e-mail - mail your message to <vojtech@ucw.cz>, or by paper mail:
  24  * Vojtech Pavlik, Simunkova 1594, Prague 8, 182 00 Czech Republic
  25  */
  26
  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  * Version Information
  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
  42 MODULE_AUTHOR(DRIVER_AUTHOR);
  43 MODULE_DESCRIPTION(DRIVER_DESC);
  44 MODULE_LICENSE(DRIVER_LICENSE);
  45
  46 static 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
  65 struct 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
  82 static 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:                 /* success */
  89                 break;
  90         case -ECONNRESET:       /* unlink */
  91         case -ENOENT:
  92         case -ESHUTDOWN:
  93                 return;
  94         /* -EPIPE:  should clear the halt */
  95         default:                /* error */
  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                                 info("Unknown key (scancode %#x) released.", kbd->old[i]);
 109                 }
 110
 111                 if (kbd->new[i] > 3 && memscan(kbd->old + 2, kbd->new[i], 6) == kbd->old + 8) {
 112                         if (usb_kbd_keycode[kbd->new[i]])
 113                                 input_report_key(kbd->dev, usb_kbd_keycode[kbd->new[i]], 1);
 114                         else
 115                                 info("Unknown key (scancode %#x) pressed.", kbd->new[i]);
 116                 }
 117         }
 118
 119         input_sync(kbd->dev);
 120
 121         memcpy(kbd->old, kbd->new, 8);
 122
 123 resubmit:
 124         i = usb_submit_urb (urb, GFP_ATOMIC);
 125         if (i)
 126                 err_hid ("can't resubmit intr, %s-%s/input0, status %d",
 127                                 kbd->usbdev->bus->bus_name,
 128                                 kbd->usbdev->devpath, i);
 129 }
 130
 131 static int usb_kbd_event(struct input_dev *dev, unsigned int type,
 132                          unsigned int code, int value)
 133 {
 134         struct usb_kbd *kbd = input_get_drvdata(dev);
 135
 136         if (type != EV_LED)
 137                 return -1;
 138
 139         kbd->newleds = (!!test_bit(LED_KANA,    dev->led) << 3) | (!!test_bit(LED_COMPOSE, dev->led) << 3) |
 140                        (!!test_bit(LED_SCROLLL, dev->led) << 2) | (!!test_bit(LED_CAPSL,   dev->led) << 1) |
 141                        (!!test_bit(LED_NUML,    dev->led));
 142
 143         if (kbd->led->status == -EINPROGRESS)
 144                 return 0;
 145
 146         if (*(kbd->leds) == kbd->newleds)
 147                 return 0;
 148
 149         *(kbd->leds) = kbd->newleds;
 150         kbd->led->dev = kbd->usbdev;
 151         if (usb_submit_urb(kbd->led, GFP_ATOMIC))
 152                 err_hid("usb_submit_urb(leds) failed");
 153
 154         return 0;
 155 }
 156
 157 static void usb_kbd_led(struct urb *urb)
 158 {
 159         struct usb_kbd *kbd = urb->context;
 160
 161         if (urb->status)
 162                 warn("led urb status %d received", urb->status);
 163
 164         if (*(kbd->leds) == kbd->newleds)
 165                 return;
 166
 167         *(kbd->leds) = kbd->newleds;
 168         kbd->led->dev = kbd->usbdev;
 169         if (usb_submit_urb(kbd->led, GFP_ATOMIC))
 170                 err_hid("usb_submit_urb(leds) failed");
 171 }
 172
 173 static int usb_kbd_open(struct input_dev *dev)
 174 {
 175         struct usb_kbd *kbd = input_get_drvdata(dev);
 176
 177         kbd->irq->dev = kbd->usbdev;
 178         if (usb_submit_urb(kbd->irq, GFP_KERNEL))
 179                 return -EIO;
 180
 181         return 0;
 182 }
 183
 184 static void usb_kbd_close(struct input_dev *dev)
 185 {
 186         struct usb_kbd *kbd = input_get_drvdata(dev);
 187
 188         usb_kill_urb(kbd->irq);
 189 }
 190
 191 static int usb_kbd_alloc_mem(struct usb_device *dev, struct usb_kbd *kbd)
 192 {
 193         if (!(kbd->irq = usb_alloc_urb(0, GFP_KERNEL)))
 194                 return -1;
 195         if (!(kbd->led = usb_alloc_urb(0, GFP_KERNEL)))
 196                 return -1;
 197         if (!(kbd->new = usb_buffer_alloc(dev, 8, GFP_ATOMIC, &kbd->new_dma)))
 198                 return -1;
 199         if (!(kbd->cr = usb_buffer_alloc(dev, sizeof(struct usb_ctrlrequest), GFP_ATOMIC, &kbd->cr_dma)))
 200                 return -1;
 201         if (!(kbd->leds = usb_buffer_alloc(dev, 1, GFP_ATOMIC, &kbd->leds_dma)))
 202                 return -1;
 203
 204         return 0;
 205 }
 206
 207 static void usb_kbd_free_mem(struct usb_device *dev, struct usb_kbd *kbd)
 208 {
 209         usb_free_urb(kbd->irq);
 210         usb_free_urb(kbd->led);
 211         usb_buffer_free(dev, 8, kbd->new, kbd->new_dma);
 212         usb_buffer_free(dev, sizeof(struct usb_ctrlrequest), kbd->cr, kbd->cr_dma);
 213         usb_buffer_free(dev, 1, kbd->leds, kbd->leds_dma);
 214 }
 215
 216 static int usb_kbd_probe(struct usb_interface *iface,
 217                          const struct usb_device_id *id)
 218 {
 219         struct usb_device *dev = interface_to_usbdev(iface);
 220         struct usb_host_interface *interface;
 221         struct usb_endpoint_descriptor *endpoint;
 222         struct usb_kbd *kbd;
 223         struct input_dev *input_dev;
 224         int i, pipe, maxp;
 225         int error = -ENOMEM;
 226
 227         interface = iface->cur_altsetting;
 228
 229         if (interface->desc.bNumEndpoints != 1)
 230                 return -ENODEV;
 231
 232         endpoint = &interface->endpoint[0].desc;
 233         if (!usb_endpoint_is_int_in(endpoint))
 234                 return -ENODEV;
 235
 236         pipe = usb_rcvintpipe(dev, endpoint->bEndpointAddress);
 237         maxp = usb_maxpacket(dev, pipe, usb_pipeout(pipe));
 238
 239         kbd = kzalloc(sizeof(struct usb_kbd), GFP_KERNEL);
 240         input_dev = input_allocate_device();
 241         if (!kbd || !input_dev)
 242                 goto fail1;
 243
 244         if (usb_kbd_alloc_mem(dev, kbd))
 245                 goto fail2;
 246
 247         kbd->usbdev = dev;
 248         kbd->dev = input_dev;
 249
 250         if (dev->manufacturer)
 251                 strlcpy(kbd->name, dev->manufacturer, sizeof(kbd->name));
 252
 253         if (dev->product) {
 254                 if (dev->manufacturer)
 255                         strlcat(kbd->name, " ", sizeof(kbd->name));
 256                 strlcat(kbd->name, dev->product, sizeof(kbd->name));
 257         }
 258
 259         if (!strlen(kbd->name))
 260                 snprintf(kbd->name, sizeof(kbd->name),
 261                          "USB HIDBP Keyboard %04x:%04x",
 262                          le16_to_cpu(dev->descriptor.idVendor),
 263                          le16_to_cpu(dev->descriptor.idProduct));
 264
 265         usb_make_path(dev, kbd->phys, sizeof(kbd->phys));
 266         strlcpy(kbd->phys, "/input0", sizeof(kbd->phys));
 267
 268         input_dev->name = kbd->name;
 269         input_dev->phys = kbd->phys;
 270         usb_to_input_id(dev, &input_dev->id);
 271         input_dev->dev.parent = &iface->dev;
 272
 273         input_set_drvdata(input_dev, kbd);
 274
 275         input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_LED) |
 276                 BIT_MASK(EV_REP);
 277         input_dev->ledbit[0] = BIT_MASK(LED_NUML) | BIT_MASK(LED_CAPSL) |
 278                 BIT_MASK(LED_SCROLLL) | BIT_MASK(LED_COMPOSE) |
 279                 BIT_MASK(LED_KANA);
 280
 281         for (i = 0; i < 255; i++)
 282                 set_bit(usb_kbd_keycode[i], input_dev->keybit);
 283         clear_bit(0, input_dev->keybit);
 284
 285         input_dev->event = usb_kbd_event;
 286         input_dev->open = usb_kbd_open;
 287         input_dev->close = usb_kbd_close;
 288
 289         usb_fill_int_urb(kbd->irq, dev, pipe,
 290                          kbd->new, (maxp > 8 ? 8 : maxp),
 291                          usb_kbd_irq, kbd, endpoint->bInterval);
 292         kbd->irq->transfer_dma = kbd->new_dma;
 293         kbd->irq->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
 294
 295         kbd->cr->bRequestType = USB_TYPE_CLASS | USB_RECIP_INTERFACE;
 296         kbd->cr->bRequest = 0x09;
 297         kbd->cr->wValue = cpu_to_le16(0x200);
 298         kbd->cr->wIndex = cpu_to_le16(interface->desc.bInterfaceNumber);
 299         kbd->cr->wLength = cpu_to_le16(1);
 300
 301         usb_fill_control_urb(kbd->led, dev, usb_sndctrlpipe(dev, 0),
 302                              (void *) kbd->cr, kbd->leds, 1,
 303                              usb_kbd_led, kbd);
 304         kbd->led->setup_dma = kbd->cr_dma;
 305         kbd->led->transfer_dma = kbd->leds_dma;
 306         kbd->led->transfer_flags |= (URB_NO_TRANSFER_DMA_MAP | URB_NO_SETUP_DMA_MAP);
 307
 308         error = input_register_device(kbd->dev);
 309         if (error)
 310                 goto fail2;
 311
 312         usb_set_intfdata(iface, kbd);
 313         return 0;
 314
 315 fail2:
 316         usb_kbd_free_mem(dev, kbd);
 317 fail1:
 318         input_free_device(input_dev);
 319         kfree(kbd);
 320         return error;
 321 }
 322
 323 static void usb_kbd_disconnect(struct usb_interface *intf)
 324 {
 325         struct usb_kbd *kbd = usb_get_intfdata (intf);
 326
 327         usb_set_intfdata(intf, NULL);
 328         if (kbd) {
 329                 usb_kill_urb(kbd->irq);
 330                 input_unregister_device(kbd->dev);
 331                 usb_kbd_free_mem(interface_to_usbdev(intf), kbd);
 332                 kfree(kbd);
 333         }
 334 }
 335
 336 static struct usb_device_id usb_kbd_id_table [] = {
 337         { USB_INTERFACE_INFO(USB_INTERFACE_CLASS_HID, USB_INTERFACE_SUBCLASS_BOOT,
 338                 USB_INTERFACE_PROTOCOL_KEYBOARD) },
 339         { }                                             /* Terminating entry */
 340 };
 341
 342 MODULE_DEVICE_TABLE (usb, usb_kbd_id_table);
 343
 344 static struct usb_driver usb_kbd_driver = {
 345         .name =         "usbkbd",
 346         .probe =        usb_kbd_probe,
 347         .disconnect =   usb_kbd_disconnect,
 348         .id_table =     usb_kbd_id_table,
 349 };
 350
 351 static int __init usb_kbd_init(void)
 352 {
 353         int result = usb_register(&usb_kbd_driver);
 354         if (result == 0)
 355                 info(DRIVER_VERSION ":" DRIVER_DESC);
 356         return result;
 357 }
 358
 359 static void __exit usb_kbd_exit(void)
 360 {
 361         usb_deregister(&usb_kbd_driver);
 362 }
 363
 364 module_init(usb_kbd_init);
 365 module_exit(usb_kbd_exit);