44 static void w1_write_bit(struct w1_master *dev, int bit);
45 static u8 w1_read_bit(struct w1_master *dev);
52 u8 w1_touch_bit(struct w1_master *dev, int bit)  in w1_touch_bit()  argument
54 	if (dev->bus_master->touch_bit)  in w1_touch_bit()
55 		return dev->bus_master->touch_bit(dev->bus_master->data, bit);  in w1_touch_bit()
57 		return w1_read_bit(dev);  in w1_touch_bit()
59 		w1_write_bit(dev, 0);  in w1_touch_bit()
72 static void w1_write_bit(struct w1_master *dev, int bit)  in w1_write_bit()  argument
79 		dev->bus_master->write_bit(dev->bus_master->data, 0);  in w1_write_bit()
81 		dev->bus_master->write_bit(dev->bus_master->data, 1);  in w1_write_bit()
84 		dev->bus_master->write_bit(dev->bus_master->data, 0);  in w1_write_bit()
86 		dev->bus_master->write_bit(dev->bus_master->data, 1);  in w1_write_bit()
101 static void w1_pre_write(struct w1_master *dev)  in w1_pre_write()  argument
103 	if (dev->pullup_duration &&  in w1_pre_write()
104 		dev->enable_pullup && dev->bus_master->set_pullup) {  in w1_pre_write()
105 		dev->bus_master->set_pullup(dev->bus_master->data,  in w1_pre_write()
106 			dev->pullup_duration);  in w1_pre_write()
118 static void w1_post_write(struct w1_master *dev)  in w1_post_write()  argument
120 	if (dev->pullup_duration) {  in w1_post_write()
121 		if (dev->enable_pullup && dev->bus_master->set_pullup)  in w1_post_write()
122 			dev->bus_master->set_pullup(dev->bus_master->data, 0);  in w1_post_write()
124 			msleep(dev->pullup_duration);  in w1_post_write()
125 		dev->pullup_duration = 0;  in w1_post_write()
134 void w1_write_8(struct w1_master *dev, u8 byte)  in w1_write_8()  argument
138 	if (dev->bus_master->write_byte) {  in w1_write_8()
139 		w1_pre_write(dev);  in w1_write_8()
140 		dev->bus_master->write_byte(dev->bus_master->data, byte);  in w1_write_8()
145 				w1_pre_write(dev);  in w1_write_8()
146 			w1_touch_bit(dev, (byte >> i) & 0x1);  in w1_write_8()
148 	w1_post_write(dev);  in w1_write_8()
159 static u8 w1_read_bit(struct w1_master *dev)  in w1_read_bit()  argument
166 	dev->bus_master->write_bit(dev->bus_master->data, 0);  in w1_read_bit()
168 	dev->bus_master->write_bit(dev->bus_master->data, 1);  in w1_read_bit()
171 	result = dev->bus_master->read_bit(dev->bus_master->data);  in w1_read_bit()
193 u8 w1_triplet(struct w1_master *dev, int bdir)  in w1_triplet()  argument
195 	if (dev->bus_master->triplet)  in w1_triplet()
196 		return dev->bus_master->triplet(dev->bus_master->data, bdir);  in w1_triplet()
198 		u8 id_bit   = w1_touch_bit(dev, 1);  in w1_triplet()
199 		u8 comp_bit = w1_touch_bit(dev, 1);  in w1_triplet()
214 		if (dev->bus_master->touch_bit)  in w1_triplet()
215 			w1_touch_bit(dev, bdir);  in w1_triplet()
217 			w1_write_bit(dev, bdir);  in w1_triplet()
229 u8 w1_read_8(struct w1_master *dev)  in w1_read_8()  argument
234 	if (dev->bus_master->read_byte)  in w1_read_8()
235 		res = dev->bus_master->read_byte(dev->bus_master->data);  in w1_read_8()
238 			res |= (w1_touch_bit(dev,1) << i);  in w1_read_8()
250 void w1_write_block(struct w1_master *dev, const u8 *buf, int len)  in w1_write_block()  argument
254 	if (dev->bus_master->write_block) {  in w1_write_block()
255 		w1_pre_write(dev);  in w1_write_block()
256 		dev->bus_master->write_block(dev->bus_master->data, buf, len);  in w1_write_block()
260 			w1_write_8(dev, buf[i]); /* calls w1_pre_write */  in w1_write_block()
261 	w1_post_write(dev);  in w1_write_block()
271 void w1_touch_block(struct w1_master *dev, u8 *buf, int len)  in w1_touch_block()  argument
280 				w1_pre_write(dev);  in w1_touch_block()
281 			tmp |= w1_touch_bit(dev, (buf[i] >> j) & 0x1) << j;  in w1_touch_block()
296 u8 w1_read_block(struct w1_master *dev, u8 *buf, int len)  in w1_read_block()  argument
301 	if (dev->bus_master->read_block)  in w1_read_block()
302 		ret = dev->bus_master->read_block(dev->bus_master->data, buf, len);  in w1_read_block()
305 			buf[i] = w1_read_8(dev);  in w1_read_block()
318 int w1_reset_bus(struct w1_master *dev)  in w1_reset_bus()  argument
325 	if (dev->bus_master->reset_bus)  in w1_reset_bus()
326 		result = dev->bus_master->reset_bus(dev->bus_master->data) & 0x1;  in w1_reset_bus()
328 		dev->bus_master->write_bit(dev->bus_master->data, 0);  in w1_reset_bus()
337 		dev->bus_master->write_bit(dev->bus_master->data, 1);  in w1_reset_bus()
340 		result = dev->bus_master->read_bit(dev->bus_master->data) & 0x1;  in w1_reset_bus()
366 void w1_search_devices(struct w1_master *dev, u8 search_type, w1_slave_found_callback cb)  in w1_search_devices()  argument
368 	dev->attempts++;  in w1_search_devices()
369 	if (dev->bus_master->search)  in w1_search_devices()
370 		dev->bus_master->search(dev->bus_master->data, dev,  in w1_search_devices()
373 		w1_search(dev, search_type, cb);  in w1_search_devices()
421 int w1_reset_resume_command(struct w1_master *dev)  in w1_reset_resume_command()  argument
423 	if (w1_reset_bus(dev))  in w1_reset_resume_command()
426 	w1_write_8(dev, dev->slave_count > 1 ? W1_RESUME_CMD : W1_SKIP_ROM);  in w1_reset_resume_command()
445 void w1_next_pullup(struct w1_master *dev, int delay)  in w1_next_pullup()  argument
447 	dev->pullup_duration = delay;  in w1_next_pullup()