32 nvkm_fan_update(struct nvkm_fan *fan, bool immediate, int target)  in nvkm_fan_update()  argument
34 	struct nvkm_therm *therm = fan->parent;  in nvkm_fan_update()
35 	struct nvkm_subdev *subdev = &therm->subdev;  in nvkm_fan_update()
36 	struct nvkm_timer *tmr = subdev->device->timer;  in nvkm_fan_update()
41 	/* update target fan speed, restricting to allowed range */  in nvkm_fan_update()
42 	spin_lock_irqsave(&fan->lock, flags);  in nvkm_fan_update()
43 	if (target < 0)  in nvkm_fan_update()
44 		target = fan->percent;  in nvkm_fan_update()
45 	target = max_t(u8, target, fan->bios.min_duty);  in nvkm_fan_update()
46 	target = min_t(u8, target, fan->bios.max_duty);  in nvkm_fan_update()
47 	if (fan->percent != target) {  in nvkm_fan_update()
48 		nvkm_debug(subdev, "FAN target: %d\n", target);  in nvkm_fan_update()
49 		fan->percent = target;  in nvkm_fan_update()
52 	/* check that we're not already at the target duty cycle */  in nvkm_fan_update()
53 	duty = fan->get(therm);  in nvkm_fan_update()
54 	if (duty == target) {  in nvkm_fan_update()
55 		spin_unlock_irqrestore(&fan->lock, flags);  in nvkm_fan_update()
65 		if (duty < target)  in nvkm_fan_update()
66 			duty = min(duty + 3, target);  in nvkm_fan_update()
67 		else if (duty > target)  in nvkm_fan_update()
68 			duty = max(duty - 3, target);  in nvkm_fan_update()
70 		duty = target;  in nvkm_fan_update()
74 	ret = fan->set(therm, duty);  in nvkm_fan_update()
76 		spin_unlock_irqrestore(&fan->lock, flags);  in nvkm_fan_update()
81 	 * alarm-scheduling lock and risking a deadlock  in nvkm_fan_update()
83 	spin_unlock_irqrestore(&fan->lock, flags);  in nvkm_fan_update()
85 	/* schedule next fan update, if not at target speed already */  in nvkm_fan_update()
86 	if (target != duty) {  in nvkm_fan_update()
87 		u16 bump_period = fan->bios.bump_period;  in nvkm_fan_update()
88 		u16 slow_down_period = fan->bios.slow_down_period;  in nvkm_fan_update()
91 		if (duty > target)  in nvkm_fan_update()
93 		else if (duty == target)  in nvkm_fan_update()
98 		nvkm_timer_alarm(tmr, delay * 1000 * 1000, &fan->alarm);  in nvkm_fan_update()
108 	nvkm_fan_update(fan, false, -1);  in nvkm_fan_alarm()
114 	return therm->fan->get(therm);  in nvkm_therm_fan_get()
120 	return nvkm_fan_update(therm->fan, immediate, percent);  in nvkm_therm_fan_set()
126 	struct nvkm_device *device = therm->subdev.device;  in nvkm_therm_fan_sense()
127 	struct nvkm_timer *tmr = device->timer;  in nvkm_therm_fan_sense()
128 	struct nvkm_gpio *gpio = device->gpio;  in nvkm_therm_fan_sense()
132 	if (therm->func->fan_sense)  in nvkm_therm_fan_sense()
133 		return therm->func->fan_sense(therm);  in nvkm_therm_fan_sense()
135 	if (therm->fan->tach.func == DCB_GPIO_UNUSED)  in nvkm_therm_fan_sense()
136 		return -ENODEV;  in nvkm_therm_fan_sense()
138 	/* Time a complete rotation and extrapolate to RPM:  in nvkm_therm_fan_sense()
140 	 * We get 4 changes (0 -> 1 -> 0 -> 1) per complete rotation.  in nvkm_therm_fan_sense()
143 	prev = nvkm_gpio_get(gpio, 0, therm->fan->tach.func,  in nvkm_therm_fan_sense()
144 				      therm->fan->tach.line);  in nvkm_therm_fan_sense()
147 		usleep_range(500, 1000); /* supports 0 < rpm < 7500 */  in nvkm_therm_fan_sense()
149 		cur = nvkm_gpio_get(gpio, 0, therm->fan->tach.func,  in nvkm_therm_fan_sense()
150 					     therm->fan->tach.line);  in nvkm_therm_fan_sense()
157 	} while (cycles < 5 && nvkm_timer_read(tmr) - start < 250000000);  in nvkm_therm_fan_sense()
162 		do_div(tach, (end - start));  in nvkm_therm_fan_sense()
177 	if (therm->mode != NVKM_THERM_CTRL_MANUAL)  in nvkm_therm_fan_user_set()
178 		return -EINVAL;  in nvkm_therm_fan_user_set()
186 	therm->fan->bios.pwm_freq = 0;  in nvkm_therm_fan_set_defaults()
187 	therm->fan->bios.min_duty = 0;  in nvkm_therm_fan_set_defaults()
188 	therm->fan->bios.max_duty = 100;  in nvkm_therm_fan_set_defaults()
189 	therm->fan->bios.bump_period = 500;  in nvkm_therm_fan_set_defaults()
190 	therm->fan->bios.slow_down_period = 2000;  in nvkm_therm_fan_set_defaults()
191 	therm->fan->bios.linear_min_temp = 40;  in nvkm_therm_fan_set_defaults()
192 	therm->fan->bios.linear_max_temp = 85;  in nvkm_therm_fan_set_defaults()
198 	if (therm->fan->bios.min_duty > 100)  in nvkm_therm_fan_safety_checks()
199 		therm->fan->bios.min_duty = 100;  in nvkm_therm_fan_safety_checks()
200 	if (therm->fan->bios.max_duty > 100)  in nvkm_therm_fan_safety_checks()
201 		therm->fan->bios.max_duty = 100;  in nvkm_therm_fan_safety_checks()
203 	if (therm->fan->bios.min_duty > therm->fan->bios.max_duty)  in nvkm_therm_fan_safety_checks()
204 		therm->fan->bios.min_duty = therm->fan->bios.max_duty;  in nvkm_therm_fan_safety_checks()
216 	struct nvkm_timer *tmr = therm->subdev.device->timer;  in nvkm_therm_fan_fini()
218 		nvkm_timer_alarm(tmr, 0, &therm->fan->alarm);  in nvkm_therm_fan_fini()
225 	struct nvkm_subdev *subdev = &therm->subdev;  in nvkm_therm_fan_ctor()
226 	struct nvkm_device *device = subdev->device;  in nvkm_therm_fan_ctor()
227 	struct nvkm_gpio *gpio = device->gpio;  in nvkm_therm_fan_ctor()
228 	struct nvkm_bios *bios = device->bios;  in nvkm_therm_fan_ctor()
238 			ret = -EINVAL;  in nvkm_therm_fan_ctor()
253 	nvkm_debug(subdev, "FAN control: %s\n", therm->fan->type);  in nvkm_therm_fan_ctor()
256 	therm->fan->percent = nvkm_therm_fan_get(therm);  in nvkm_therm_fan_ctor()
260 			     &therm->fan->tach);  in nvkm_therm_fan_ctor()
262 		therm->fan->tach.func = DCB_GPIO_UNUSED;  in nvkm_therm_fan_ctor()
265 	therm->fan->parent = therm;  in nvkm_therm_fan_ctor()
266 	nvkm_alarm_init(&therm->fan->alarm, nvkm_fan_alarm);  in nvkm_therm_fan_ctor()
267 	spin_lock_init(&therm->fan->lock);  in nvkm_therm_fan_ctor()
271 	nvbios_perf_fan_parse(bios, &therm->fan->perf);  in nvkm_therm_fan_ctor()
272 	if (!nvbios_fan_parse(bios, &therm->fan->bios)) {  in nvkm_therm_fan_ctor()
274 		if (nvbios_therm_fan_parse(bios, &therm->fan->bios))  in nvkm_therm_fan_ctor()