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 strlcat(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); 370