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/init.h>
  33 #include <linux/usb/input.h>
  34
  35 /*
  36  * Version Information
  37  */
  38 #define DRIVER_VERSION ""
  39 #define DRIVER_AUTHOR "Vojtech Pavlik <vojtech@ucw.cz>"
  40 #define DRIVER_DESC "USB HID Boot Protocol keyboard driver"
  41 #define DRIVER_LICENSE "GPL"
  42
  43 MODULE_AUTHOR(DRIVER_AUTHOR);
  44 MODULE_DESCRIPTION(DRIVER_DESC);
  45 MODULE_LICENSE(DRIVER_LICENSE);
  46
  47 static unsigned char usb_kbd_keycode[256] = {
  48           0,  0,  0,  0, 30, 48, 46, 32, 18, 33, 34, 35, 23, 36, 37, 38,
  49          50, 49, 24, 25, 16, 19, 31, 20, 22, 47, 17, 45, 21, 44,  2,  3,
  50           4,  5,  6,  7,  8,  9, 10, 11, 28,  1, 14, 15, 57, 12, 13, 26,
  51          27, 43, 43, 39, 40, 41, 51, 52, 53, 58, 59, 60, 61, 62, 63, 64,
  52          65, 66, 67, 68, 87, 88, 99, 70,119,110,102,104,111,107,109,106,
  53         105,108,103, 69, 98, 55, 74, 78, 96, 79, 80, 81, 75, 76, 77, 71,
  54          72, 73, 82, 83, 86,127,116,117,183,184,185,186,187,188,189,190,
  55         191,192,193,194,134,138,130,132,128,129,131,137,133,135,136,113,
  56         115,114,  0,  0,  0,121,  0, 89, 93,124, 92, 94, 95,  0,  0,  0,
  57         122,123, 90, 91, 85,  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           0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,
  62          29, 42, 56,125, 97, 54,100,126,164,166,165,163,161,115,114,113,
  63         150,158,159,128,136,177,178,176,142,152,173,140
  64 };
  65
  66 struct usb_kbd {
  67         struct input_dev *dev;
  68         struct usb_device *usbdev;
  69         unsigned char old[8];
  70         struct urb *irq, *led;
  71         unsigned char newleds;
  72         char name[128];
  73         char phys[64];
  74
  75         unsigned char *new;
  76         struct usb_ctrlrequest *cr;
  77         unsigned char *leds;
  78         dma_addr_t cr_dma;
  79         dma_addr_t new_dma;
  80         dma_addr_t leds_dma;
  81 };
  82
  83 static void usb_kbd_irq(struct urb *urb, struct pt_regs *regs)
  84 {
  85         struct usb_kbd *kbd = urb->context;
  86         int i;
  87
  88         switch (urb->status) {
  89         case 0:                 /* success */
  90                 break;
  91         case -ECONNRESET:       /* unlink */
  92         case -ENOENT:
  93         case -ESHUTDOWN:
  94                 return;
  95         /* -EPIPE:  should clear the halt */
  96         default:                /* error */
  97                 goto resubmit;
  98         }
  99
 100         input_regs(kbd->dev, regs);
 101
 102         for (i = 0; i < 8; i++)
 103                 input_report_key(kbd->dev, usb_kbd_keycode[i + 224], (kbd->new[0] >> i) & 1);
 104
 105         for (i = 2; i < 8; i++) {
 106
 107                 if (kbd->old[i] > 3 && memscan(kbd->new + 2, kbd->old[i], 6) == kbd->new + 8) {
 108                         if (usb_kbd_keycode[kbd->old[i]])
 109                                 input_report_key(kbd->dev, usb_kbd_keycode[kbd->old[i]], 0);
 110                         else
 111                                 info("Unknown key (scancode %#x) released.", kbd->old[i]);
 112                 }
 113
 114                 if (kbd->new[i] > 3 && memscan(kbd->old + 2, kbd->new[i], 6) == kbd->old + 8) {
 115                         if (usb_kbd_keycode[kbd->new[i]])
 116                                 input_report_key(kbd->dev, usb_kbd_keycode[kbd->new[i]], 1);
 117                         else
 118                                 info("Unknown key (scancode %#x) pressed.", kbd->new[i]);
 119                 }
 120         }
 121
 122         input_sync(kbd->dev);
 123
 124         memcpy(kbd->old, kbd->new, 8);
 125
 126 resubmit:
 127         i = usb_submit_urb (urb, SLAB_ATOMIC);
 128         if (i)
 129                 err ("can't resubmit intr, %s-%s/input0, status %d",
 130                                 kbd->usbdev->bus->bus_name,
 131                                 kbd->usbdev->devpath, i);
 132 }
 133
 134 static int usb_kbd_event(struct input_dev *dev, unsigned int type,
 135                          unsigned int code, int value)
 136 {
 137         struct usb_kbd *kbd = dev->private;
 138
 139         if (type != EV_LED)
 140                 return -1;
 141
 142
 143         kbd->newleds = (!!test_bit(LED_KANA,    dev->led) << 3) | (!!test_bit(LED_COMPOSE, dev->led) << 3) |
 144                        (!!test_bit(LED_SCROLLL, dev->led) << 2) | (!!test_bit(LED_CAPSL,   dev->led) << 1) |
 145                        (!!test_bit(LED_NUML,    dev->led));
 146
 147         if (kbd->led->status == -EINPROGRESS)
 148                 return 0;
 149
 150         if (*(kbd->leds) == kbd->newleds)
 151                 return 0;
 152
 153         *(kbd->leds) = kbd->newleds;
 154         kbd->led->dev = kbd->usbdev;
 155         if (usb_submit_urb(kbd->led, GFP_ATOMIC))
 156                 err("usb_submit_urb(leds) failed");
 157
 158         return 0;
 159 }
 160
 161 static void usb_kbd_led(struct urb *urb, struct pt_regs *regs)
 162 {
 163         struct usb_kbd *kbd = urb->context;
 164
 165         if (urb->status)
 166                 warn("led urb status %d received", urb->status);
 167
 168         if (*(kbd->leds) == kbd->newleds)
 169                 return;
 170
 171         *(kbd->leds) = kbd->newleds;
 172         kbd->led->dev = kbd->usbdev;
 173         if (usb_submit_urb(kbd->led, GFP_ATOMIC))
 174                 err("usb_submit_urb(leds) failed");
 175 }
 176
 177 static int usb_kbd_open(struct input_dev *dev)
 178 {
 179         struct usb_kbd *kbd = dev->private;
 180
 181         kbd->irq->dev = kbd->usbdev;
 182         if (usb_submit_urb(kbd->irq, GFP_KERNEL))
 183                 return -EIO;
 184
 185         return 0;
 186 }
 187
 188 static void usb_kbd_close(struct input_dev *dev)
 189 {
 190         struct usb_kbd *kbd = dev->private;
 191
 192         usb_kill_urb(kbd->irq);
 193 }
 194
 195 static int usb_kbd_alloc_mem(struct usb_device *dev, struct usb_kbd *kbd)
 196 {
 197         if (!(kbd->irq = usb_alloc_urb(0, GFP_KERNEL)))
 198                 return -1;
 199         if (!(kbd->led = usb_alloc_urb(0, GFP_KERNEL)))
 200                 return -1;
 201         if (!(kbd->new = usb_buffer_alloc(dev, 8, SLAB_ATOMIC, &kbd->new_dma)))
 202                 return -1;
 203         if (!(kbd->cr = usb_buffer_alloc(dev, sizeof(struct usb_ctrlrequest), SLAB_ATOMIC, &kbd->cr_dma)))
 204                 return -1;
 205         if (!(kbd->leds = usb_buffer_alloc(dev, 1, SLAB_ATOMIC, &kbd->leds_dma)))
 206                 return -1;
 207
 208         return 0;
 209 }
 210
 211 static void usb_kbd_free_mem(struct usb_device *dev, struct usb_kbd *kbd)
 212 {
 213         if (kbd->irq)
 214                 usb_free_urb(kbd->irq);
 215         if (kbd->led)
 216                 usb_free_urb(kbd->led);
 217         if (kbd->new)
 218                 usb_buffer_free(dev, 8, kbd->new, kbd->new_dma);
 219         if (kbd->cr)
 220                 usb_buffer_free(dev, sizeof(struct usb_ctrlrequest), kbd->cr, kbd->cr_dma);
 221         if (kbd->leds)
 222                 usb_buffer_free(dev, 1, kbd->leds, kbd->leds_dma);
 223 }
 224
 225 static int usb_kbd_probe(struct usb_interface *iface,
 226                          const struct usb_device_id *id)
 227 {
 228         struct usb_device *dev = interface_to_usbdev(iface);
 229         struct usb_host_interface *interface;
 230         struct usb_endpoint_descriptor *endpoint;
 231         struct usb_kbd *kbd;
 232         struct input_dev *input_dev;
 233         int i, pipe, maxp;
 234
 235         interface = iface->cur_altsetting;
 236
 237         if (interface->desc.bNumEndpoints != 1)
 238                 return -ENODEV;
 239
 240         endpoint = &interface->endpoint[0].desc;
 241         if (!(endpoint->bEndpointAddress & USB_DIR_IN))
 242                 return -ENODEV;
 243         if ((endpoint->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) != USB_ENDPOINT_XFER_INT)
 244                 return -ENODEV;
 245
 246         pipe = usb_rcvintpipe(dev, endpoint->bEndpointAddress);
 247         maxp = usb_maxpacket(dev, pipe, usb_pipeout(pipe));
 248
 249         kbd = kzalloc(sizeof(struct usb_kbd), GFP_KERNEL);
 250         input_dev = input_allocate_device();
 251         if (!kbd || !input_dev)
 252                 goto fail1;
 253
 254         if (usb_kbd_alloc_mem(dev, kbd))
 255                 goto fail2;
 256
 257         kbd->usbdev = dev;
 258         kbd->dev = input_dev;
 259
 260         if (dev->manufacturer)
 261                 strlcpy(kbd->name, dev->manufacturer, sizeof(kbd->name));
 262
 263         if (dev->product) {
 264                 if (dev->manufacturer)
 265                         strlcat(kbd->name, " ", sizeof(kbd->name));
 266                 strlcat(kbd->name, dev->product, sizeof(kbd->name));
 267         }
 268
 269         if (!strlen(kbd->name))
 270                 snprintf(kbd->name, sizeof(kbd->name),
 271                          "USB HIDBP Keyboard %04x:%04x",
 272                          le16_to_cpu(dev->descriptor.idVendor),
 273                          le16_to_cpu(dev->descriptor.idProduct));
 274
 275         usb_make_path(dev, kbd->phys, sizeof(kbd->phys));
 276         strlcpy(kbd->phys, "/input0", sizeof(kbd->phys));
 277
 278         input_dev->name = kbd->name;
 279         input_dev->phys = kbd->phys;
 280         usb_to_input_id(dev, &input_dev->id);
 281         input_dev->cdev.dev = &iface->dev;
 282         input_dev->private = kbd;
 283
 284         input_dev->evbit[0] = BIT(EV_KEY) | BIT(EV_LED) | BIT(EV_REP);
 285         input_dev->ledbit[0] = BIT(LED_NUML) | BIT(LED_CAPSL) | BIT(LED_SCROLLL) | BIT(LED_COMPOSE) | BIT(LED_KANA);
 286
 287         for (i = 0; i < 255; i++)
 288                 set_bit(usb_kbd_keycode[i], input_dev->keybit);
 289         clear_bit(0, input_dev->keybit);
 290
 291         input_dev->event = usb_kbd_event;
 292         input_dev->open = usb_kbd_open;
 293         input_dev->close = usb_kbd_close;
 294
 295         usb_fill_int_urb(kbd->irq, dev, pipe,
 296                          kbd->new, (maxp > 8 ? 8 : maxp),
 297                          usb_kbd_irq, kbd, endpoint->bInterval);
 298         kbd->irq->transfer_dma = kbd->new_dma;
 299         kbd->irq->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
 300
 301         kbd->cr->bRequestType = USB_TYPE_CLASS | USB_RECIP_INTERFACE;
 302         kbd->cr->bRequest = 0x09;
 303         kbd->cr->wValue = cpu_to_le16(0x200);
 304         kbd->cr->wIndex = cpu_to_le16(interface->desc.bInterfaceNumber);
 305         kbd->cr->wLength = cpu_to_le16(1);
 306
 307         usb_fill_control_urb(kbd->led, dev, usb_sndctrlpipe(dev, 0),
 308                              (void *) kbd->cr, kbd->leds, 1,
 309                              usb_kbd_led, kbd);
 310         kbd->led->setup_dma = kbd->cr_dma;
 311         kbd->led->transfer_dma = kbd->leds_dma;
 312         kbd->led->transfer_flags |= (URB_NO_TRANSFER_DMA_MAP | URB_NO_SETUP_DMA_MAP);
 313
 314         input_register_device(kbd->dev);
 315
 316         usb_set_intfdata(iface, kbd);
 317         return 0;
 318
 319 fail2:  usb_kbd_free_mem(dev, kbd);
 320 fail1:  input_free_device(input_dev);
 321         kfree(kbd);
 322         return -ENOMEM;
 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(3, 1, 1) },
 340         { }                                             /* Terminating entry */
 341 };
 342
 343 MODULE_DEVICE_TABLE (usb, usb_kbd_id_table);
 344
 345 static struct usb_driver usb_kbd_driver = {
 346         .name =         "usbkbd",
 347         .probe =        usb_kbd_probe,
 348         .disconnect =   usb_kbd_disconnect,
 349         .id_table =     usb_kbd_id_table,
 350 };
 351
 352 static int __init usb_kbd_init(void)
 353 {
 354         int result = usb_register(&usb_kbd_driver);
 355         if (result == 0)
 356                 info(DRIVER_VERSION ":" DRIVER_DESC);
 357         return result;
 358 }
 359
 360 static void __exit usb_kbd_exit(void)
 361 {
 362         usb_deregister(&usb_kbd_driver);
 363 }
 364
 365 module_init(usb_kbd_init);
 366 module_exit(usb_kbd_exit);