drivers/gpu/drm/nouveau/nvkm/subdev/therm/nv40.c

Source file repositories/reference/linux-study-clean/drivers/gpu/drm/nouveau/nvkm/subdev/therm/nv40.c

File Facts

System
Linux kernel
Corpus path
drivers/gpu/drm/nouveau/nvkm/subdev/therm/nv40.c
Extension
.c
Size
5698 bytes
Lines
205
Domain
Driver Families
Bucket
drivers/gpu
Inferred role
Driver Families: implementation source
Status
source implementation candidate

Why This File Exists

Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.

Dependency Surface

Detected Declarations

Annotated Snippet

if (reg & 0x80000000) {
			*duty = (reg & 0x7fff0000) >> 16;
			*divs = (reg & 0x00007fff);
			return 0;
		}
	} else
	if (line == 9) {
		u32 reg = nvkm_rd32(device, 0x0015f4);
		if (reg & 0x80000000) {
			*divs = nvkm_rd32(device, 0x0015f8);
			*duty = (reg & 0x7fffffff);
			return 0;
		}
	} else {
		nvkm_error(subdev, "unknown pwm ctrl for gpio %d\n", line);
		return -ENODEV;
	}

	return -EINVAL;
}

static int
nv40_fan_pwm_set(struct nvkm_therm *therm, int line, u32 divs, u32 duty)
{
	struct nvkm_subdev *subdev = &therm->subdev;
	struct nvkm_device *device = subdev->device;
	if (line == 2) {
		nvkm_mask(device, 0x0010f0, 0x7fff7fff, (duty << 16) | divs);
	} else
	if (line == 9) {
		nvkm_wr32(device, 0x0015f8, divs);
		nvkm_mask(device, 0x0015f4, 0x7fffffff, duty);
	} else {
		nvkm_error(subdev, "unknown pwm ctrl for gpio %d\n", line);
		return -ENODEV;
	}

	return 0;
}

void
nv40_therm_intr(struct nvkm_therm *therm)
{
	struct nvkm_subdev *subdev = &therm->subdev;
	struct nvkm_device *device = subdev->device;
	uint32_t stat = nvkm_rd32(device, 0x1100);

	/* traitement */

	/* ack all IRQs */
	nvkm_wr32(device, 0x1100, 0x70000);

	nvkm_error(subdev, "THERM received an IRQ: stat = %x\n", stat);
}

static void
nv40_therm_init(struct nvkm_therm *therm)
{
	nv40_sensor_setup(therm);
}

static const struct nvkm_therm_func
nv40_therm = {
	.init = nv40_therm_init,
	.intr = nv40_therm_intr,
	.pwm_ctrl = nv40_fan_pwm_ctrl,
	.pwm_get = nv40_fan_pwm_get,
	.pwm_set = nv40_fan_pwm_set,
	.temp_get = nv40_temp_get,
	.program_alarms = nvkm_therm_program_alarms_polling,
};

int
nv40_therm_new(struct nvkm_device *device, enum nvkm_subdev_type type, int inst,
	       struct nvkm_therm **ptherm)
{
	return nvkm_therm_new_(&nv40_therm, device, type, inst, ptherm);
}

Annotation

Implementation Notes