drivers/staging/media/atomisp/pci/runtime/isys/src/isys_init.c

Source file repositories/reference/linux-study-clean/drivers/staging/media/atomisp/pci/runtime/isys/src/isys_init.c

File Facts

System
Linux kernel
Corpus path
drivers/staging/media/atomisp/pci/runtime/isys/src/isys_init.c
Extension
.c
Size
3375 bytes
Lines
113
Domain
Driver Families
Bucket
drivers/staging
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

// SPDX-License-Identifier: GPL-2.0
/*
 * Support for Intel Camera Imaging ISP subsystem.
 * Copyright (c) 2010 - 2015, Intel Corporation.
 */

#include "input_system.h"

#include "ia_css_isys.h"
#include "platform_support.h"

#include "isys_dma_public.h"	/* isys2401_dma_set_max_burst_size() */
#include "isys_irq.h"

static input_system_err_t ia_css_isys_2400_init(void)
{
	backend_channel_cfg_t backend_ch0;
	backend_channel_cfg_t backend_ch1;
	target_cfg2400_t targetB;
	target_cfg2400_t targetC;
	u32 acq_mem_region_size = 24;
	u32 acq_nof_mem_regions = 2;
	input_system_err_t error = INPUT_SYSTEM_ERR_NO_ERROR;

	memset(&backend_ch0, 0, sizeof(backend_channel_cfg_t));
	memset(&backend_ch1, 0, sizeof(backend_channel_cfg_t));
	memset(&targetB, 0, sizeof(targetB));
	memset(&targetC, 0, sizeof(targetC));

	error = input_system_configuration_reset();
	if (error != INPUT_SYSTEM_ERR_NO_ERROR)
		return error;

	error = input_system_csi_xmem_channel_cfg(
		    0,			/*ch_id                 */
		    INPUT_SYSTEM_PORT_A,	/*port                  */
		    backend_ch0,		/*backend_ch            */
		    32,			/*mem_region_size       */
		    6,			/*nof_mem_regions       */
		    acq_mem_region_size,	/*acq_mem_region_size   */
		    acq_nof_mem_regions,	/*acq_nof_mem_regions   */
		    targetB,		/*target                */
		    3);			/*nof_xmem_buffers      */
	if (error != INPUT_SYSTEM_ERR_NO_ERROR)
		return error;

	error = input_system_csi_xmem_channel_cfg(
		    1,			/*ch_id                 */
		    INPUT_SYSTEM_PORT_B,	/*port                  */
		    backend_ch0,		/*backend_ch            */
		    16,			/*mem_region_size       */
		    3,			/*nof_mem_regions       */
		    acq_mem_region_size,	/*acq_mem_region_size   */
		    acq_nof_mem_regions,	/*acq_nof_mem_regions   */
		    targetB,		/*target                */
		    3);			/*nof_xmem_buffers      */
	if (error != INPUT_SYSTEM_ERR_NO_ERROR)
		return error;

	error = input_system_csi_xmem_channel_cfg(
		    2,			/*ch_id                 */
		    INPUT_SYSTEM_PORT_C,	/*port                  */
		    backend_ch1,		/*backend_ch            */
		    32,			/*mem_region_size       */
		    3,			/*nof_mem_regions       */
		    acq_mem_region_size,	/*acq_mem_region_size   */
		    acq_nof_mem_regions,	/*acq_nof_mem_regions   */
		    targetC,		/*target                */
		    2);			/*nof_xmem_buffers      */
	if (error != INPUT_SYSTEM_ERR_NO_ERROR)
		return error;

	error = input_system_configuration_commit();

	return error;
}

static input_system_err_t ia_css_isys_2401_init(void)
{
	ia_css_isys_csi_rx_lut_rmgr_init();
	ia_css_isys_ibuf_rmgr_init();
	ia_css_isys_dma_channel_rmgr_init();
	ia_css_isys_stream2mmio_sid_rmgr_init();

	isys2401_dma_set_max_burst_size(ISYS2401_DMA0_ID,
					1 /* Non Burst DMA transactions */);

	/* Enable 2401 input system IRQ status for driver to retrieve */
	isys_irqc_status_enable(ISYS_IRQ0_ID);
	isys_irqc_status_enable(ISYS_IRQ1_ID);

Annotation

Implementation Notes