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