input/misc/keyspan_remote.c

26 /* Defines for converting the data from the remote. */
85 /* Structure to store all the real stuff that a remote sends to us. */
115 	/* variables used to parse messages from remote. */
124  * Debug routine that prints out what we've received from the remote.
167 static void keyspan_report_button(struct usb_keyspan *remote, int button, int press)
169 	struct input_dev *input = remote->input;
172 	input_report_key(input, remote->keymap[button], press);
177  * Routine that handles all the logic needed to parse out the message from the remote.
179 static void keyspan_check_data(struct usb_keyspan *remote)
185 	switch(remote->stage) {
188 		 * In stage 0 we want to find the start of a message.  The remote sends a 0xFF as filler.
191 		for (i = 0; i < RECV_SIZE && remote->in_buffer[i] == GAP; ++i);
194 			memcpy(remote->data.buffer, remote->in_buffer, RECV_SIZE);
195 			remote->data.len = RECV_SIZE;
196 			remote->data.pos = 0;
197 			remote->data.tester = 0;
198 			remote->data.bits_left = 0;
199 			remote->stage = 1;
208 		memcpy(remote->data.buffer + remote->data.len, remote->in_buffer, RECV_SIZE);
209 		remote->data.len += RECV_SIZE;
212 		while ((remote->data.bits_left >= 14 || remote->data.pos < remote->data.len) && !found) {
214 				if (keyspan_load_tester(remote, 14) != 0) {
215 					remote->stage = 0;
219 				if ((remote->data.tester & SYNC_MASK) == SYNC) {
220 					remote->data.tester = remote->data.tester >> 14;
221 					remote->data.bits_left -= 14;
225 					remote->data.tester = remote->data.tester >> 1;
226 					--remote->data.bits_left;
232 			remote->stage = 0;
233 			remote->data.len = 0;
235 			remote->stage = 2;
245 		memcpy(remote->data.buffer + remote->data.len, remote->in_buffer, RECV_SIZE);
246 		remote->data.len += RECV_SIZE;
250 			keyspan_load_tester(remote, 6);
252 			if ((remote->data.tester & ZERO_MASK) == ZERO) {
254 				remote->data.tester = remote->data.tester >> 5;
255 				remote->data.bits_left -= 5;
256 			} else if ((remote->data.tester & ONE_MASK) == ONE) {
258 				remote->data.tester = remote->data.tester >> 6;
259 				remote->data.bits_left -= 6;
261 				dev_err(&remote->interface->dev,
264 				remote->stage = 0;
271 			keyspan_load_tester(remote, 6);
273 			if ((remote->data.tester & ZERO_MASK) == ZERO) {
275 				remote->data.tester = remote->data.tester >> 5;
276 				remote->data.bits_left -= 5;
277 			} else if ((remote->data.tester & ONE_MASK) == ONE) {
279 				remote->data.tester = remote->data.tester >> 6;
280 				remote->data.bits_left -= 6;
282 				dev_err(&remote->interface->dev,
285 				remote->stage = 0;
290 		keyspan_load_tester(remote, 6);
291 		if ((remote->data.tester & ZERO_MASK) == ZERO) {
293 			remote->data.tester = remote->data.tester >> 5;
294 			remote->data.bits_left -= 5;
295 		} else if ((remote->data.tester & ONE_MASK) == ONE) {
297 			remote->data.tester = remote->data.tester >> 6;
298 			remote->data.bits_left -= 6;
300 			dev_err(&remote->interface->dev,
303 			remote->stage = 0;
307 		keyspan_load_tester(remote, 5);
308 		if ((remote->data.tester & STOP_MASK) == STOP) {
309 			remote->data.tester = remote->data.tester >> 5;
310 			remote->data.bits_left -= 5;
312 			dev_err(&remote->interface->dev,
316 		dev_dbg(&remote->interface->dev,
320 		if (message.toggle != remote->toggle) {
321 			keyspan_report_button(remote, message.button, 1);
322 			keyspan_report_button(remote, message.button, 0);
323 			remote->toggle = message.toggle;
326 		remote->stage = 0;
332  * Routine for sending all the initialization messages to the remote.
407 	struct usb_keyspan *remote = input_get_drvdata(dev);
409 	remote->irq_urb->dev = remote->udev;
410 	if (usb_submit_urb(remote->irq_urb, GFP_KERNEL))
418 	struct usb_keyspan *remote = input_get_drvdata(dev);
420 	usb_kill_urb(remote->irq_urb);
448 	struct usb_keyspan *remote;
456 	remote = kzalloc(sizeof(*remote), GFP_KERNEL);
458 	if (!remote || !input_dev) {
463 	remote->udev = udev;
464 	remote->input = input_dev;
465 	remote->interface = interface;
466 	remote->in_endpoint = endpoint;
467 	remote->toggle = -1;	/* Set to -1 so we will always not match the toggle from the first remote message. */
469 	remote->in_buffer = usb_alloc_coherent(udev, RECV_SIZE, GFP_KERNEL, &remote->in_dma);
470 	if (!remote->in_buffer) {
475 	remote->irq_urb = usb_alloc_urb(0, GFP_KERNEL);
476 	if (!remote->irq_urb) {
488 		strscpy(remote->name, udev->manufacturer, sizeof(remote->name));
492 			strlcat(remote->name, " ", sizeof(remote->name));
493 		strlcat(remote->name, udev->product, sizeof(remote->name));
496 	if (!strlen(remote->name))
497 		snprintf(remote->name, sizeof(remote->name),
502 	usb_make_path(udev, remote->phys, sizeof(remote->phys));
503 	strlcat(remote->phys, "/input0", sizeof(remote->phys));
504 	memcpy(remote->keymap, keyspan_key_table, sizeof(remote->keymap));
506 	input_dev->name = remote->name;
507 	input_dev->phys = remote->phys;
510 	input_dev->keycode = remote->keymap;
512 	input_dev->keycodemax = ARRAY_SIZE(remote->keymap);
520 	input_set_drvdata(input_dev, remote);
529 	usb_fill_int_urb(remote->irq_urb,
530 			 remote->udev,
531 			 usb_rcvintpipe(remote->udev, endpoint->bEndpointAddress),
532 			 remote->in_buffer, RECV_SIZE, keyspan_irq_recv, remote,
534 	remote->irq_urb->transfer_dma = remote->in_dma;
535 	remote->irq_urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
538 	error = input_register_device(remote->input);
543 	usb_set_intfdata(interface, remote);
547  fail3:	usb_free_urb(remote->irq_urb);
548  fail2:	usb_free_coherent(udev, RECV_SIZE, remote->in_buffer, remote->in_dma);
549  fail1:	kfree(remote);
560 	struct usb_keyspan *remote;
562 	remote = usb_get_intfdata(interface);
565 	if (remote) {	/* We have a valid driver structure so clean up everything we allocated. */
566 		input_unregister_device(remote->input);
567 		usb_kill_urb(remote->irq_urb);
568 		usb_free_urb(remote->irq_urb);
569 		usb_free_coherent(remote->udev, RECV_SIZE, remote->in_buffer, remote->in_dma);
570 		kfree(remote);
589 MODULE_DESCRIPTION("Driver for the USB Keyspan remote control.");