48 	struct linedisp *linedisp;  member
55 static int create_attachment(struct device *dev, struct linedisp *linedisp, bool direct)  in create_attachment()  argument
64 	attachment->linedisp = linedisp;  in create_attachment()
73 static struct linedisp *delete_attachment(struct device *dev, bool direct)  in delete_attachment()
76 	struct linedisp *linedisp;  in delete_attachment()  local
89 	linedisp = attachment->linedisp;  in delete_attachment()
93 	return linedisp;  in delete_attachment()
96 static struct linedisp *to_linedisp(struct device *dev)  in to_linedisp()
110 	return attachment->linedisp;  in to_linedisp()
113 static inline bool should_scroll(struct linedisp *linedisp)  in should_scroll()  argument
115 	return linedisp->message_len > linedisp->num_chars && linedisp->scroll_rate;  in should_scroll()
127 	struct linedisp *linedisp = timer_container_of(linedisp, t, timer);  in linedisp_scroll()  local
128 	unsigned int i, ch = linedisp->scroll_pos;  in linedisp_scroll()
129 	unsigned int num_chars = linedisp->num_chars;  in linedisp_scroll()
134 		for (; i < num_chars && ch < linedisp->message_len; i++, ch++)  in linedisp_scroll()
135 			linedisp->buf[i] = linedisp->message[ch];  in linedisp_scroll()
142 	linedisp->ops->update(linedisp);  in linedisp_scroll()
145 	linedisp->scroll_pos++;  in linedisp_scroll()
146 	linedisp->scroll_pos %= linedisp->message_len;  in linedisp_scroll()
149 	mod_timer(&linedisp->timer, jiffies + linedisp->scroll_rate);  in linedisp_scroll()
164 static int linedisp_display(struct linedisp *linedisp, const char *msg,  in linedisp_display()  argument
170 	timer_delete_sync(&linedisp->timer);  in linedisp_display()
181 		kfree(linedisp->message);  in linedisp_display()
182 		linedisp->message = NULL;  in linedisp_display()
183 		linedisp->message_len = 0;  in linedisp_display()
184 		memset(linedisp->buf, ' ', linedisp->num_chars);  in linedisp_display()
185 		linedisp->ops->update(linedisp);  in linedisp_display()
193 	kfree(linedisp->message);  in linedisp_display()
195 	linedisp->message = new_msg;  in linedisp_display()
196 	linedisp->message_len = count;  in linedisp_display()
197 	linedisp->scroll_pos = 0;  in linedisp_display()
199 	if (should_scroll(linedisp)) {  in linedisp_display()
201 		linedisp_scroll(&linedisp->timer);  in linedisp_display()
204 		memset(linedisp->buf, ' ', linedisp->num_chars);  in linedisp_display()
205 		memcpy(linedisp->buf, linedisp->message,  in linedisp_display()
206 		       umin(linedisp->num_chars, linedisp->message_len));  in linedisp_display()
207 		linedisp->ops->update(linedisp);  in linedisp_display()
227 	struct linedisp *linedisp = to_linedisp(dev);  in message_show()  local
229 	return sysfs_emit(buf, "%s\n", linedisp->message);  in message_show()
246 	struct linedisp *linedisp = to_linedisp(dev);  in message_store()  local
249 	err = linedisp_display(linedisp, buf, count);  in message_store()
258 	struct linedisp *linedisp = to_linedisp(dev);  in num_chars_show()  local
260 	return sysfs_emit(buf, "%u\n", linedisp->num_chars);  in num_chars_show()
268 	struct linedisp *linedisp = to_linedisp(dev);  in scroll_step_ms_show()  local
270 	return sysfs_emit(buf, "%u\n", jiffies_to_msecs(linedisp->scroll_rate));  in scroll_step_ms_show()
277 	struct linedisp *linedisp = to_linedisp(dev);  in scroll_step_ms_store()  local
285 	timer_delete_sync(&linedisp->timer);  in scroll_step_ms_store()
287 	linedisp->scroll_rate = msecs_to_jiffies(ms);  in scroll_step_ms_store()
289 	if (should_scroll(linedisp))  in scroll_step_ms_store()
290 		linedisp_scroll(&linedisp->timer);  in scroll_step_ms_store()
299 	struct linedisp *linedisp = to_linedisp(dev);  in map_seg_show()  local
300 	struct linedisp_map *map = linedisp->map;  in map_seg_show()
309 	struct linedisp *linedisp = to_linedisp(dev);  in map_seg_store()  local
310 	struct linedisp_map *map = linedisp->map;  in map_seg_store()
337 	struct linedisp *linedisp = to_linedisp(dev);  in linedisp_attr_is_visible()  local
338 	struct linedisp_map *map = linedisp->map;  in linedisp_attr_is_visible()
362 __ATTRIBUTE_GROUPS(linedisp);
368 	struct linedisp *linedisp = to_linedisp(dev);  in linedisp_release()  local
370 	kfree(linedisp->map);  in linedisp_release()
371 	kfree(linedisp->message);  in linedisp_release()
372 	kfree(linedisp->buf);  in linedisp_release()
373 	ida_free(&linedisp_id, linedisp->id);  in linedisp_release()
381 static int linedisp_init_map(struct linedisp *linedisp)  in linedisp_init_map()  argument
386 	if (!linedisp->ops->get_map_type)  in linedisp_init_map()
389 	err = linedisp->ops->get_map_type(linedisp);  in linedisp_init_map()
414 	linedisp->map = map;  in linedisp_init_map()
438 int linedisp_attach(struct linedisp *linedisp, struct device *dev,  in linedisp_attach()  argument
443 	memset(linedisp, 0, sizeof(*linedisp));  in linedisp_attach()
444 	linedisp->ops = ops;  in linedisp_attach()
445 	linedisp->num_chars = num_chars;  in linedisp_attach()
446 	linedisp->scroll_rate = DEFAULT_SCROLL_RATE;  in linedisp_attach()
448 	linedisp->buf = kzalloc(linedisp->num_chars, GFP_KERNEL);  in linedisp_attach()
449 	if (!linedisp->buf)  in linedisp_attach()
453 	err = linedisp_init_map(linedisp);  in linedisp_attach()
458 	timer_setup(&linedisp->timer, linedisp_scroll, 0);  in linedisp_attach()
460 	err = create_attachment(dev, linedisp, true);  in linedisp_attach()
465 	err = linedisp_display(linedisp, LINEDISP_INIT_TEXT, -1);  in linedisp_attach()
479 	timer_delete_sync(&linedisp->timer);  in linedisp_attach()
481 	kfree(linedisp->buf);  in linedisp_attach()
493 	struct linedisp *linedisp;  in linedisp_detach()  local
495 	linedisp = delete_attachment(dev, true);  in linedisp_detach()
496 	if (!linedisp)  in linedisp_detach()
499 	timer_delete_sync(&linedisp->timer);  in linedisp_detach()
503 	kfree(linedisp->map);  in linedisp_detach()
504 	kfree(linedisp->message);  in linedisp_detach()
505 	kfree(linedisp->buf);  in linedisp_detach()
523 int linedisp_register(struct linedisp *linedisp, struct device *parent,  in linedisp_register()  argument
528 	memset(linedisp, 0, sizeof(*linedisp));  in linedisp_register()
529 	linedisp->dev.parent = parent;  in linedisp_register()
530 	linedisp->dev.type = &linedisp_type;  in linedisp_register()
531 	linedisp->ops = ops;  in linedisp_register()
532 	linedisp->num_chars = num_chars;  in linedisp_register()
533 	linedisp->scroll_rate = DEFAULT_SCROLL_RATE;  in linedisp_register()
538 	linedisp->id = err;  in linedisp_register()
540 	device_initialize(&linedisp->dev);  in linedisp_register()
541 	dev_set_name(&linedisp->dev, "linedisp.%u", linedisp->id);  in linedisp_register()
544 	linedisp->buf = kzalloc(linedisp->num_chars, GFP_KERNEL);  in linedisp_register()
545 	if (!linedisp->buf)  in linedisp_register()
549 	err = linedisp_init_map(linedisp);  in linedisp_register()
554 	timer_setup(&linedisp->timer, linedisp_scroll, 0);  in linedisp_register()
556 	err = create_attachment(&linedisp->dev, linedisp, false);  in linedisp_register()
561 	err = linedisp_display(linedisp, LINEDISP_INIT_TEXT, -1);  in linedisp_register()
565 	err = device_add(&linedisp->dev);  in linedisp_register()
572 	delete_attachment(&linedisp->dev, false);  in linedisp_register()
574 	timer_delete_sync(&linedisp->timer);  in linedisp_register()
576 	put_device(&linedisp->dev);  in linedisp_register()
586 void linedisp_unregister(struct linedisp *linedisp)  in linedisp_unregister()  argument
588 	device_del(&linedisp->dev);  in linedisp_unregister()
589 	delete_attachment(&linedisp->dev, false);  in linedisp_unregister()
590 	timer_delete_sync(&linedisp->timer);  in linedisp_unregister()
591 	put_device(&linedisp->dev);  in linedisp_unregister()