subdev/i2c/aux.c

27 #include "aux.h"
33 	struct nvkm_i2c_aux *aux = container_of(adap, typeof(*aux), i2c);
37 	ret = nvkm_i2c_aux_acquire(aux);
60 				ret = aux->func->xfer(aux, true, cmd,
66 				AUX_TRACE(aux, "no data after 32 retries");
80 	nvkm_i2c_aux_release(aux);
97 nvkm_i2c_aux_monitor(struct nvkm_i2c_aux *aux, bool monitor)
99 	struct nvkm_i2c_pad *pad = aux->pad;
100 	AUX_TRACE(aux, "monitor: %s", str_yes_no(monitor));
108 nvkm_i2c_aux_release(struct nvkm_i2c_aux *aux)
110 	struct nvkm_i2c_pad *pad = aux->pad;
111 	AUX_TRACE(aux, "release");
113 	mutex_unlock(&aux->mutex);
117 nvkm_i2c_aux_acquire(struct nvkm_i2c_aux *aux)
119 	struct nvkm_i2c_pad *pad = aux->pad;
122 	AUX_TRACE(aux, "acquire");
123 	mutex_lock(&aux->mutex);
125 	if (aux->enabled)
131 		mutex_unlock(&aux->mutex);
136 nvkm_i2c_aux_xfer(struct nvkm_i2c_aux *aux, bool retry, u8 type,
139 	if (!*size && !aux->func->address_only) {
140 		AUX_ERR(aux, "address-only transaction dropped");
143 	return aux->func->xfer(aux, retry, type, addr, data, size);
147 nvkm_i2c_aux_lnk_ctl(struct nvkm_i2c_aux *aux, int nr, int bw, bool ef)
149 	if (aux->func->lnk_ctl)
150 		return aux->func->lnk_ctl(aux, nr, bw, ef);
157 	struct nvkm_i2c_aux *aux = *paux;
158 	if (aux && !WARN_ON(!aux->func)) {
159 		AUX_TRACE(aux, "dtor");
160 		list_del(&aux->head);
161 		i2c_del_adapter(&aux->i2c);
168 nvkm_i2c_aux_init(struct nvkm_i2c_aux *aux)
170 	AUX_TRACE(aux, "init");
171 	mutex_lock(&aux->mutex);
172 	aux->enabled = true;
173 	mutex_unlock(&aux->mutex);
177 nvkm_i2c_aux_fini(struct nvkm_i2c_aux *aux)
179 	AUX_TRACE(aux, "fini");
180 	mutex_lock(&aux->mutex);
181 	aux->enabled = false;
182 	mutex_unlock(&aux->mutex);
188 		  struct nvkm_i2c_aux *aux)
192 	aux->func = func;
193 	aux->pad = pad;
194 	aux->id = id;
195 	mutex_init(&aux->mutex);
196 	list_add_tail(&aux->head, &pad->i2c->aux);
197 	AUX_TRACE(aux, "ctor");
199 	snprintf(aux->i2c.name, sizeof(aux->i2c.name), "nvkm-%s-aux-%04x",
201 	aux->i2c.owner = THIS_MODULE;
202 	aux->i2c.dev.parent = device->dev;
203 	aux->i2c.algo = &nvkm_i2c_aux_i2c_algo;
204 	return i2c_add_adapter(&aux->i2c);