61 static void w1_write_bit(struct w1_master *dev, int bit);
62 static u8 w1_read_bit(struct w1_master *dev);
69 static u8 w1_touch_bit(struct w1_master *dev, int bit)  in w1_touch_bit()  argument
71 	if (dev->bus_master->touch_bit)  in w1_touch_bit()
72 		return dev->bus_master->touch_bit(dev->bus_master->data, bit);  in w1_touch_bit()
74 		return w1_read_bit(dev);  in w1_touch_bit()
76 		w1_write_bit(dev, 0);  in w1_touch_bit()
88 static void w1_write_bit(struct w1_master *dev, int bit)  in w1_write_bit()  argument
95 		dev->bus_master->write_bit(dev->bus_master->data, 0);  in w1_write_bit()
97 		dev->bus_master->write_bit(dev->bus_master->data, 1);  in w1_write_bit()
100 		dev->bus_master->write_bit(dev->bus_master->data, 0);  in w1_write_bit()
102 		dev->bus_master->write_bit(dev->bus_master->data, 1);  in w1_write_bit()
117 static void w1_pre_write(struct w1_master *dev)  in w1_pre_write()  argument
119 	if (dev->pullup_duration &&  in w1_pre_write()
120 		dev->enable_pullup && dev->bus_master->set_pullup) {  in w1_pre_write()
121 		dev->bus_master->set_pullup(dev->bus_master->data,  in w1_pre_write()
122 			dev->pullup_duration);  in w1_pre_write()
134 static void w1_post_write(struct w1_master *dev)  in w1_post_write()  argument
136 	if (dev->pullup_duration) {  in w1_post_write()
137 		if (dev->enable_pullup && dev->bus_master->set_pullup)  in w1_post_write()
138 			dev->bus_master->set_pullup(dev->bus_master->data, 0);  in w1_post_write()
140 			msleep(dev->pullup_duration);  in w1_post_write()
141 		dev->pullup_duration = 0;  in w1_post_write()
150 void w1_write_8(struct w1_master *dev, u8 byte)  in w1_write_8()  argument
154 	if (dev->bus_master->write_byte) {  in w1_write_8()
155 		w1_pre_write(dev);  in w1_write_8()
156 		dev->bus_master->write_byte(dev->bus_master->data, byte);  in w1_write_8()
161 				w1_pre_write(dev);  in w1_write_8()
162 			w1_touch_bit(dev, (byte >> i) & 0x1);  in w1_write_8()
164 	w1_post_write(dev);  in w1_write_8()
175 static u8 w1_read_bit(struct w1_master *dev)  in w1_read_bit()  argument
182 	dev->bus_master->write_bit(dev->bus_master->data, 0);  in w1_read_bit()
184 	dev->bus_master->write_bit(dev->bus_master->data, 1);  in w1_read_bit()
187 	result = dev->bus_master->read_bit(dev->bus_master->data);  in w1_read_bit()
208 u8 w1_triplet(struct w1_master *dev, int bdir)  in w1_triplet()  argument
210 	if (dev->bus_master->triplet)  in w1_triplet()
211 		return dev->bus_master->triplet(dev->bus_master->data, bdir);  in w1_triplet()
213 		u8 id_bit   = w1_touch_bit(dev, 1);  in w1_triplet()
214 		u8 comp_bit = w1_touch_bit(dev, 1);  in w1_triplet()
229 		if (dev->bus_master->touch_bit)  in w1_triplet()
230 			w1_touch_bit(dev, bdir);  in w1_triplet()
232 			w1_write_bit(dev, bdir);  in w1_triplet()
243 u8 w1_read_8(struct w1_master *dev)  in w1_read_8()  argument
248 	if (dev->bus_master->read_byte)  in w1_read_8()
249 		res = dev->bus_master->read_byte(dev->bus_master->data);  in w1_read_8()
252 			res |= (w1_touch_bit(dev,1) << i);  in w1_read_8()
264 void w1_write_block(struct w1_master *dev, const u8 *buf, int len)  in w1_write_block()  argument
268 	if (dev->bus_master->write_block) {  in w1_write_block()
269 		w1_pre_write(dev);  in w1_write_block()
270 		dev->bus_master->write_block(dev->bus_master->data, buf, len);  in w1_write_block()
274 			w1_write_8(dev, buf[i]); /* calls w1_pre_write */  in w1_write_block()
275 	w1_post_write(dev);  in w1_write_block()
285 void w1_touch_block(struct w1_master *dev, u8 *buf, int len)  in w1_touch_block()  argument
294 				w1_pre_write(dev);  in w1_touch_block()
295 			tmp |= w1_touch_bit(dev, (buf[i] >> j) & 0x1) << j;  in w1_touch_block()
310 u8 w1_read_block(struct w1_master *dev, u8 *buf, int len)  in w1_read_block()  argument
315 	if (dev->bus_master->read_block)  in w1_read_block()
316 		ret = dev->bus_master->read_block(dev->bus_master->data, buf, len);  in w1_read_block()
319 			buf[i] = w1_read_8(dev);  in w1_read_block()
332 int w1_reset_bus(struct w1_master *dev)  in w1_reset_bus()  argument
339 	if (dev->bus_master->reset_bus)  in w1_reset_bus()
340 		result = dev->bus_master->reset_bus(dev->bus_master->data) & 0x1;  in w1_reset_bus()
342 		dev->bus_master->write_bit(dev->bus_master->data, 0);  in w1_reset_bus()
351 		dev->bus_master->write_bit(dev->bus_master->data, 1);  in w1_reset_bus()
354 		result = dev->bus_master->read_bit(dev->bus_master->data) & 0x1;  in w1_reset_bus()
380 void w1_search_devices(struct w1_master *dev, u8 search_type, w1_slave_found_callback cb)  in w1_search_devices()  argument
382 	dev->attempts++;  in w1_search_devices()
383 	if (dev->bus_master->search)  in w1_search_devices()
384 		dev->bus_master->search(dev->bus_master->data, dev,  in w1_search_devices()
387 		w1_search(dev, search_type, cb);  in w1_search_devices()
435 int w1_reset_resume_command(struct w1_master *dev)  in w1_reset_resume_command()  argument
437 	if (w1_reset_bus(dev))  in w1_reset_resume_command()
441 	w1_write_8(dev, W1_RESUME_CMD);  in w1_reset_resume_command()
460 void w1_next_pullup(struct w1_master *dev, int delay)  in w1_next_pullup()  argument
462 	dev->pullup_duration = delay;  in w1_next_pullup()