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                                 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
 125 resubmit:
 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
 133 static 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
 159 static 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
 176 static 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
 187 static 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
 194 static 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
 210 static 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
 219 static 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
 318 fail2:
 319         usb_kbd_free_mem(dev, kbd);
 320 fail1:
 321         input_free_device(input_dev);
 322         kfree(kbd);
 323         return error;
 324 }
 325
 326 static 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
 339 static 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         { }                                             /* Terminating entry */
 343 };
 344
 345 MODULE_DEVICE_TABLE (usb, usb_kbd_id_table);
 346
 347 static 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
 354 static 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
 363 static void __exit usb_kbd_exit(void)
 364 {
 365         usb_deregister(&usb_kbd_driver);
 366 }
 367
 368 module_init(usb_kbd_init);
 369 module_exit(usb_kbd_exit);