drivers/usb/input/usbkbd.c

   1 /*
   2  * $Id: usbkbd.c,v 1.27 2001/12/27 10:37:41 vojtech 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 #include <linux/usb_input.h>
  36
  37 /*
  38  * Version Information
  39  */
  40 #define DRIVER_VERSION ""
  41 #define DRIVER_AUTHOR "Vojtech Pavlik <vojtech@ucw.cz>"
  42 #define DRIVER_DESC "USB HID Boot Protocol keyboard driver"
  43 #define DRIVER_LICENSE "GPL"
  44
  45 MODULE_AUTHOR(DRIVER_AUTHOR);
  46 MODULE_DESCRIPTION(DRIVER_DESC);
  47 MODULE_LICENSE(DRIVER_LICENSE);
  48
  49 static unsigned char usb_kbd_keycode[256] = {
  50           0,  0,  0,  0, 30, 48, 46, 32, 18, 33, 34, 35, 23, 36, 37, 38,
  51          50, 49, 24, 25, 16, 19, 31, 20, 22, 47, 17, 45, 21, 44,  2,  3,
  52           4,  5,  6,  7,  8,  9, 10, 11, 28,  1, 14, 15, 57, 12, 13, 26,
  53          27, 43, 43, 39, 40, 41, 51, 52, 53, 58, 59, 60, 61, 62, 63, 64,
  54          65, 66, 67, 68, 87, 88, 99, 70,119,110,102,104,111,107,109,106,
  55         105,108,103, 69, 98, 55, 74, 78, 96, 79, 80, 81, 75, 76, 77, 71,
  56          72, 73, 82, 83, 86,127,116,117,183,184,185,186,187,188,189,190,
  57         191,192,193,194,134,138,130,132,128,129,131,137,133,135,136,113,
  58         115,114,  0,  0,  0,121,  0, 89, 93,124, 92, 94, 95,  0,  0,  0,
  59         122,123, 90, 91, 85,  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           0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,
  64          29, 42, 56,125, 97, 54,100,126,164,166,165,163,161,115,114,113,
  65         150,158,159,128,136,177,178,176,142,152,173,140
  66 };
  67
  68 struct usb_kbd {
  69         struct input_dev dev;
  70         struct usb_device *usbdev;
  71         unsigned char old[8];
  72         struct urb *irq, *led;
  73         unsigned char newleds;
  74         char name[128];
  75         char phys[64];
  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 static int usb_kbd_event(struct input_dev *dev, unsigned int type,
 137                          unsigned int code, int value)
 138 {
 139         struct usb_kbd *kbd = dev->private;
 140
 141         if (type != EV_LED)
 142                 return -1;
 143
 144
 145         kbd->newleds = (!!test_bit(LED_KANA,    dev->led) << 3) | (!!test_bit(LED_COMPOSE, dev->led) << 3) |
 146                        (!!test_bit(LED_SCROLLL, dev->led) << 2) | (!!test_bit(LED_CAPSL,   dev->led) << 1) |
 147                        (!!test_bit(LED_NUML,    dev->led));
 148
 149         if (kbd->led->status == -EINPROGRESS)
 150                 return 0;
 151
 152         if (*(kbd->leds) == kbd->newleds)
 153                 return 0;
 154
 155         *(kbd->leds) = kbd->newleds;
 156         kbd->led->dev = kbd->usbdev;
 157         if (usb_submit_urb(kbd->led, GFP_ATOMIC))
 158                 err("usb_submit_urb(leds) failed");
 159
 160         return 0;
 161 }
 162
 163 static void usb_kbd_led(struct urb *urb, struct pt_regs *regs)
 164 {
 165         struct usb_kbd *kbd = urb->context;
 166
 167         if (urb->status)
 168                 warn("led urb status %d received", urb->status);
 169
 170         if (*(kbd->leds) == kbd->newleds)
 171                 return;
 172
 173         *(kbd->leds) = kbd->newleds;
 174         kbd->led->dev = kbd->usbdev;
 175         if (usb_submit_urb(kbd->led, GFP_ATOMIC))
 176                 err("usb_submit_urb(leds) failed");
 177 }
 178
 179 static int usb_kbd_open(struct input_dev *dev)
 180 {
 181         struct usb_kbd *kbd = dev->private;
 182
 183         kbd->irq->dev = kbd->usbdev;
 184         if (usb_submit_urb(kbd->irq, GFP_KERNEL))
 185                 return -EIO;
 186
 187         return 0;
 188 }
 189
 190 static void usb_kbd_close(struct input_dev *dev)
 191 {
 192         struct usb_kbd *kbd = dev->private;
 193
 194         usb_kill_urb(kbd->irq);
 195 }
 196
 197 static int usb_kbd_alloc_mem(struct usb_device *dev, struct usb_kbd *kbd)
 198 {
 199         if (!(kbd->irq = usb_alloc_urb(0, GFP_KERNEL)))
 200                 return -1;
 201         if (!(kbd->led = usb_alloc_urb(0, GFP_KERNEL)))
 202                 return -1;
 203         if (!(kbd->new = usb_buffer_alloc(dev, 8, SLAB_ATOMIC, &kbd->new_dma)))
 204                 return -1;
 205         if (!(kbd->cr = usb_buffer_alloc(dev, sizeof(struct usb_ctrlrequest), SLAB_ATOMIC, &kbd->cr_dma)))
 206                 return -1;
 207         if (!(kbd->leds = usb_buffer_alloc(dev, 1, SLAB_ATOMIC, &kbd->leds_dma)))
 208                 return -1;
 209
 210         return 0;
 211 }
 212
 213 static void usb_kbd_free_mem(struct usb_device *dev, struct usb_kbd *kbd)
 214 {
 215         if (kbd->irq)
 216                 usb_free_urb(kbd->irq);
 217         if (kbd->led)
 218                 usb_free_urb(kbd->led);
 219         if (kbd->new)
 220                 usb_buffer_free(dev, 8, kbd->new, kbd->new_dma);
 221         if (kbd->cr)
 222                 usb_buffer_free(dev, sizeof(struct usb_ctrlrequest), kbd->cr, kbd->cr_dma);
 223         if (kbd->leds)
 224                 usb_buffer_free(dev, 1, kbd->leds, kbd->leds_dma);
 225 }
 226
 227 static int usb_kbd_probe(struct usb_interface *iface,
 228                          const struct usb_device_id *id)
 229 {
 230         struct usb_device * dev = interface_to_usbdev(iface);
 231         struct usb_host_interface *interface;
 232         struct usb_endpoint_descriptor *endpoint;
 233         struct usb_kbd *kbd;
 234         int i, pipe, maxp;
 235         char path[64];
 236
 237         interface = iface->cur_altsetting;
 238
 239         if (interface->desc.bNumEndpoints != 1)
 240                 return -ENODEV;
 241
 242         endpoint = &interface->endpoint[0].desc;
 243         if (!(endpoint->bEndpointAddress & 0x80))
 244                 return -ENODEV;
 245         if ((endpoint->bmAttributes & 3) != 3)
 246                 return -ENODEV;
 247
 248         pipe = usb_rcvintpipe(dev, endpoint->bEndpointAddress);
 249         maxp = usb_maxpacket(dev, pipe, usb_pipeout(pipe));
 250
 251         if (!(kbd = kmalloc(sizeof(struct usb_kbd), GFP_KERNEL)))
 252                 return -ENOMEM;
 253         memset(kbd, 0, sizeof(struct usb_kbd));
 254
 255         if (usb_kbd_alloc_mem(dev, kbd)) {
 256                 usb_kbd_free_mem(dev, kbd);
 257                 kfree(kbd);
 258                 return -ENOMEM;
 259         }
 260
 261         kbd->usbdev = dev;
 262
 263         kbd->dev.evbit[0] = BIT(EV_KEY) | BIT(EV_LED) | BIT(EV_REP);
 264         kbd->dev.ledbit[0] = BIT(LED_NUML) | BIT(LED_CAPSL) | BIT(LED_SCROLLL) | BIT(LED_COMPOSE) | BIT(LED_KANA);
 265
 266         for (i = 0; i < 255; i++)
 267                 set_bit(usb_kbd_keycode[i], kbd->dev.keybit);
 268         clear_bit(0, kbd->dev.keybit);
 269
 270         kbd->dev.private = kbd;
 271         kbd->dev.event = usb_kbd_event;
 272         kbd->dev.open = usb_kbd_open;
 273         kbd->dev.close = usb_kbd_close;
 274
 275         usb_fill_int_urb(kbd->irq, dev, pipe,
 276                          kbd->new, (maxp > 8 ? 8 : maxp),
 277                          usb_kbd_irq, kbd, endpoint->bInterval);
 278         kbd->irq->transfer_dma = kbd->new_dma;
 279         kbd->irq->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
 280
 281         kbd->cr->bRequestType = USB_TYPE_CLASS | USB_RECIP_INTERFACE;
 282         kbd->cr->bRequest = 0x09;
 283         kbd->cr->wValue = cpu_to_le16(0x200);
 284         kbd->cr->wIndex = cpu_to_le16(interface->desc.bInterfaceNumber);
 285         kbd->cr->wLength = cpu_to_le16(1);
 286
 287         usb_make_path(dev, path, 64);
 288         sprintf(kbd->phys, "%s/input0", path);
 289
 290         kbd->dev.name = kbd->name;
 291         kbd->dev.phys = kbd->phys;
 292         usb_to_input_id(dev, &kbd->dev.id);
 293         kbd->dev.dev = &iface->dev;
 294
 295         if (dev->manufacturer)
 296                 strcat(kbd->name, dev->manufacturer);
 297         if (dev->product)
 298                 sprintf(kbd->name, "%s %s", kbd->name, dev->product);
 299
 300         if (!strlen(kbd->name))
 301                 sprintf(kbd->name, "USB HIDBP Keyboard %04x:%04x",
 302                         kbd->dev.id.vendor, kbd->dev.id.product);
 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
 310                                 | URB_NO_SETUP_DMA_MAP);
 311
 312         input_register_device(&kbd->dev);
 313
 314         printk(KERN_INFO "input: %s on %s\n", kbd->name, path);
 315
 316         usb_set_intfdata(iface, kbd);
 317         return 0;
 318 }
 319
 320 static void usb_kbd_disconnect(struct usb_interface *intf)
 321 {
 322         struct usb_kbd *kbd = usb_get_intfdata (intf);
 323
 324         usb_set_intfdata(intf, NULL);
 325         if (kbd) {
 326                 usb_kill_urb(kbd->irq);
 327                 input_unregister_device(&kbd->dev);
 328                 usb_kbd_free_mem(interface_to_usbdev(intf), kbd);
 329                 kfree(kbd);
 330         }
 331 }
 332
 333 static struct usb_device_id usb_kbd_id_table [] = {
 334         { USB_INTERFACE_INFO(3, 1, 1) },
 335         { }                                             /* Terminating entry */
 336 };
 337
 338 MODULE_DEVICE_TABLE (usb, usb_kbd_id_table);
 339
 340 static struct usb_driver usb_kbd_driver = {
 341         .owner =        THIS_MODULE,
 342         .name =         "usbkbd",
 343         .probe =        usb_kbd_probe,
 344         .disconnect =   usb_kbd_disconnect,
 345         .id_table =     usb_kbd_id_table,
 346 };
 347
 348 static int __init usb_kbd_init(void)
 349 {
 350         int result = usb_register(&usb_kbd_driver);
 351         if (result == 0)
 352                 info(DRIVER_VERSION ":" DRIVER_DESC);
 353         return result;
 354 }
 355
 356 static void __exit usb_kbd_exit(void)
 357 {
 358         usb_deregister(&usb_kbd_driver);
 359 }
 360
 361 module_init(usb_kbd_init);
 362 module_exit(usb_kbd_exit);