24 #include "bus.h"
35 	struct nvkm_i2c_bus *bus = container_of(adap, typeof(*bus), i2c);  in nvkm_i2c_bus_pre_xfer()  local
36 	return nvkm_i2c_bus_acquire(bus);  in nvkm_i2c_bus_pre_xfer()
42 	struct nvkm_i2c_bus *bus = container_of(adap, typeof(*bus), i2c);  in nvkm_i2c_bus_post_xfer()  local
43 	return nvkm_i2c_bus_release(bus);  in nvkm_i2c_bus_post_xfer()
49 	struct nvkm_i2c_bus *bus = data;  in nvkm_i2c_bus_setscl()  local
50 	bus->func->drive_scl(bus, state);  in nvkm_i2c_bus_setscl()
56 	struct nvkm_i2c_bus *bus = data;  in nvkm_i2c_bus_setsda()  local
57 	bus->func->drive_sda(bus, state);  in nvkm_i2c_bus_setsda()
63 	struct nvkm_i2c_bus *bus = data;  in nvkm_i2c_bus_getscl()  local
64 	return bus->func->sense_scl(bus);  in nvkm_i2c_bus_getscl()
70 	struct nvkm_i2c_bus *bus = data;  in nvkm_i2c_bus_getsda()  local
71 	return bus->func->sense_sda(bus);  in nvkm_i2c_bus_getsda()
75  * !i2c-algo-bit (off-chip i2c bus / hw i2c / internal bit-banging algo)
80 	struct nvkm_i2c_bus *bus = container_of(adap, typeof(*bus), i2c);  in nvkm_i2c_bus_xfer()  local
83 	ret = nvkm_i2c_bus_acquire(bus);  in nvkm_i2c_bus_xfer()
87 	ret = bus->func->xfer(bus, msgs, num);  in nvkm_i2c_bus_xfer()
88 	nvkm_i2c_bus_release(bus);  in nvkm_i2c_bus_xfer()
108 nvkm_i2c_bus_init(struct nvkm_i2c_bus *bus)  in nvkm_i2c_bus_init()  argument
110 	BUS_TRACE(bus, "init");  in nvkm_i2c_bus_init()
111 	if (bus->func->init)  in nvkm_i2c_bus_init()
112 		bus->func->init(bus);  in nvkm_i2c_bus_init()
114 	mutex_lock(&bus->mutex);  in nvkm_i2c_bus_init()
115 	bus->enabled = true;  in nvkm_i2c_bus_init()
116 	mutex_unlock(&bus->mutex);  in nvkm_i2c_bus_init()
120 nvkm_i2c_bus_fini(struct nvkm_i2c_bus *bus)  in nvkm_i2c_bus_fini()  argument
122 	BUS_TRACE(bus, "fini");  in nvkm_i2c_bus_fini()
123 	mutex_lock(&bus->mutex);  in nvkm_i2c_bus_fini()
124 	bus->enabled = false;  in nvkm_i2c_bus_fini()
125 	mutex_unlock(&bus->mutex);  in nvkm_i2c_bus_fini()
129 nvkm_i2c_bus_release(struct nvkm_i2c_bus *bus)  in nvkm_i2c_bus_release()  argument
131 	struct nvkm_i2c_pad *pad = bus->pad;  in nvkm_i2c_bus_release()
132 	BUS_TRACE(bus, "release");  in nvkm_i2c_bus_release()
134 	mutex_unlock(&bus->mutex);  in nvkm_i2c_bus_release()
138 nvkm_i2c_bus_acquire(struct nvkm_i2c_bus *bus)  in nvkm_i2c_bus_acquire()  argument
140 	struct nvkm_i2c_pad *pad = bus->pad;  in nvkm_i2c_bus_acquire()
143 	BUS_TRACE(bus, "acquire");  in nvkm_i2c_bus_acquire()
144 	mutex_lock(&bus->mutex);  in nvkm_i2c_bus_acquire()
146 	if (bus->enabled)  in nvkm_i2c_bus_acquire()
152 		mutex_unlock(&bus->mutex);  in nvkm_i2c_bus_acquire()
157 nvkm_i2c_bus_probe(struct nvkm_i2c_bus *bus, const char *what,  in nvkm_i2c_bus_probe()  argument
164 	BUS_DBG(bus, "probing %ss", what);  in nvkm_i2c_bus_probe()
168 		if ((bus->i2c.algo == &i2c_bit_algo) && (info[i].udelay != 0)) {  in nvkm_i2c_bus_probe()
169 			struct i2c_algo_bit_data *algo = bus->i2c.algo_data;  in nvkm_i2c_bus_probe()
170 			BUS_DBG(bus, "%dms delay instead of %dms",  in nvkm_i2c_bus_probe()
176 		if (nvkm_probe_i2c(&bus->i2c, info[i].dev.addr) &&  in nvkm_i2c_bus_probe()
177 		    (!match || match(bus, &info[i].dev, data))) {  in nvkm_i2c_bus_probe()
178 			BUS_DBG(bus, "detected %s: %s",  in nvkm_i2c_bus_probe()
184 			struct i2c_algo_bit_data *algo = bus->i2c.algo_data;  in nvkm_i2c_bus_probe()
189 	BUS_DBG(bus, "no devices found.");  in nvkm_i2c_bus_probe()
196 	struct nvkm_i2c_bus *bus = *pbus;  in nvkm_i2c_bus_del()  local
197 	if (bus && !WARN_ON(!bus->func)) {  in nvkm_i2c_bus_del()
198 		BUS_TRACE(bus, "dtor");  in nvkm_i2c_bus_del()
199 		list_del(&bus->head);  in nvkm_i2c_bus_del()
200 		i2c_del_adapter(&bus->i2c);  in nvkm_i2c_bus_del()
201 		kfree(bus->i2c.algo_data);  in nvkm_i2c_bus_del()
210 		  struct nvkm_i2c_bus *bus)  in nvkm_i2c_bus_ctor()  argument
221 	bus->func = func;  in nvkm_i2c_bus_ctor()
222 	bus->pad = pad;  in nvkm_i2c_bus_ctor()
223 	bus->id = id;  in nvkm_i2c_bus_ctor()
224 	mutex_init(&bus->mutex);  in nvkm_i2c_bus_ctor()
225 	list_add_tail(&bus->head, &pad->i2c->bus);  in nvkm_i2c_bus_ctor()
226 	BUS_TRACE(bus, "ctor");  in nvkm_i2c_bus_ctor()
228 	snprintf(bus->i2c.name, sizeof(bus->i2c.name), "nvkm-%s-bus-%04x",  in nvkm_i2c_bus_ctor()
230 	bus->i2c.owner = THIS_MODULE;  in nvkm_i2c_bus_ctor()
231 	bus->i2c.dev.parent = device->dev;  in nvkm_i2c_bus_ctor()
233 	if ( bus->func->drive_scl &&  in nvkm_i2c_bus_ctor()
239 		bit->data = bus;  in nvkm_i2c_bus_ctor()
246 		bus->i2c.algo_data = bit;  in nvkm_i2c_bus_ctor()
247 		ret = i2c_bit_add_bus(&bus->i2c);  in nvkm_i2c_bus_ctor()
249 		bus->i2c.algo = &nvkm_i2c_bus_algo;  in nvkm_i2c_bus_ctor()
250 		ret = i2c_add_adapter(&bus->i2c);  in nvkm_i2c_bus_ctor()