drivers/media/platform/samsung/exynos4-is/fimc-is-regs.c

Source file repositories/reference/linux-study-clean/drivers/media/platform/samsung/exynos4-is/fimc-is-regs.c

File Facts

System
Linux kernel
Corpus path
drivers/media/platform/samsung/exynos4-is/fimc-is-regs.c
Extension
.c
Size
5986 bytes
Lines
232
Domain
Driver Families
Bucket
drivers/media
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 (--timeout == 0) {
			dev_warn(&is->pdev->dev, "%s timeout\n",
				 __func__);
			return -ETIMEDOUT;
		}
		udelay(1);
	} while (status != 0);

	return 0;
}

int fimc_is_hw_set_param(struct fimc_is *is)
{
	struct chain_config *config = &is->config[is->config_index];
	unsigned int param_count = __get_pending_param_count(is);

	fimc_is_hw_wait_intmsr0_intmsd0(is);

	mcuctl_write(HIC_SET_PARAMETER, is, MCUCTL_REG_ISSR(0));
	mcuctl_write(is->sensor_index, is, MCUCTL_REG_ISSR(1));
	mcuctl_write(is->config_index, is, MCUCTL_REG_ISSR(2));

	mcuctl_write(param_count, is, MCUCTL_REG_ISSR(3));
	mcuctl_write(config->p_region_index[0], is, MCUCTL_REG_ISSR(4));
	mcuctl_write(config->p_region_index[1], is, MCUCTL_REG_ISSR(5));

	fimc_is_hw_set_intgr0_gd0(is);
	return 0;
}

static int __maybe_unused fimc_is_hw_set_tune(struct fimc_is *is)
{
	fimc_is_hw_wait_intmsr0_intmsd0(is);

	mcuctl_write(HIC_SET_TUNE, is, MCUCTL_REG_ISSR(0));
	mcuctl_write(is->sensor_index, is, MCUCTL_REG_ISSR(1));
	mcuctl_write(is->h2i_cmd.entry_id, is, MCUCTL_REG_ISSR(2));

	fimc_is_hw_set_intgr0_gd0(is);
	return 0;
}

#define FIMC_IS_MAX_PARAMS	4

int fimc_is_hw_get_params(struct fimc_is *is, unsigned int num_args)
{
	int i;

	if (num_args > FIMC_IS_MAX_PARAMS)
		return -EINVAL;

	is->i2h_cmd.num_args = num_args;

	for (i = 0; i < FIMC_IS_MAX_PARAMS; i++) {
		if (i < num_args)
			is->i2h_cmd.args[i] = mcuctl_read(is,
					MCUCTL_REG_ISSR(12 + i));
		else
			is->i2h_cmd.args[i] = 0;
	}
	return 0;
}

void fimc_is_hw_set_isp_buf_mask(struct fimc_is *is, unsigned int mask)
{
	if (hweight32(mask) == 1) {
		dev_err(&is->pdev->dev, "%s(): not enough buffers (mask %#x)\n",
							__func__, mask);
		return;
	}

	if (mcuctl_read(is, MCUCTL_REG_ISSR(23)) != 0)
		dev_dbg(&is->pdev->dev, "non-zero DMA buffer mask\n");

	mcuctl_write(mask, is, MCUCTL_REG_ISSR(23));
}

void fimc_is_hw_set_sensor_num(struct fimc_is *is)
{
	pr_debug("setting sensor index to: %d\n", is->sensor_index);

	mcuctl_write(IH_REPLY_DONE, is, MCUCTL_REG_ISSR(0));
	mcuctl_write(is->sensor_index, is, MCUCTL_REG_ISSR(1));
	mcuctl_write(IHC_GET_SENSOR_NUM, is, MCUCTL_REG_ISSR(2));
	mcuctl_write(FIMC_IS_SENSORS_NUM, is, MCUCTL_REG_ISSR(3));
}

void fimc_is_hw_close_sensor(struct fimc_is *is, unsigned int index)
{
	if (is->sensor_index != index)

Annotation

Implementation Notes