drivers/media/pci/cx18/cx18-scb.c

File Facts

System

Linux kernel

Corpus path

drivers/media/pci/cx18/cx18-scb.c

Extension

.c

Size

5110 bytes

Lines

109

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.

• 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.
• Defines or uses C structs; map object ownership, embedded links, reference counts, and lock ownership.

Dependency Surface

• cx18-driver.h
• cx18-io.h
• cx18-scb.h

Detected Declarations

• function Copyright

Annotated Snippet

// SPDX-License-Identifier: GPL-2.0-or-later
/*
 *  cx18 System Control Block initialization
 *
 *  Copyright (C) 2007  Hans Verkuil <hverkuil@kernel.org>
 *  Copyright (C) 2008  Andy Walls <awalls@md.metrocast.net>
 */

#include "cx18-driver.h"
#include "cx18-io.h"
#include "cx18-scb.h"

void cx18_init_scb(struct cx18 *cx)
{
	cx18_setup_page(cx, SCB_OFFSET);
	cx18_memset_io(cx, cx->scb, 0, 0x10000);

	cx18_writel(cx, IRQ_APU_TO_CPU,     &cx->scb->apu2cpu_irq);
	cx18_writel(cx, IRQ_CPU_TO_APU_ACK, &cx->scb->cpu2apu_irq_ack);
	cx18_writel(cx, IRQ_HPU_TO_CPU,     &cx->scb->hpu2cpu_irq);
	cx18_writel(cx, IRQ_CPU_TO_HPU_ACK, &cx->scb->cpu2hpu_irq_ack);
	cx18_writel(cx, IRQ_PPU_TO_CPU,     &cx->scb->ppu2cpu_irq);
	cx18_writel(cx, IRQ_CPU_TO_PPU_ACK, &cx->scb->cpu2ppu_irq_ack);
	cx18_writel(cx, IRQ_EPU_TO_CPU,     &cx->scb->epu2cpu_irq);
	cx18_writel(cx, IRQ_CPU_TO_EPU_ACK, &cx->scb->cpu2epu_irq_ack);

	cx18_writel(cx, IRQ_CPU_TO_APU,     &cx->scb->cpu2apu_irq);
	cx18_writel(cx, IRQ_APU_TO_CPU_ACK, &cx->scb->apu2cpu_irq_ack);
	cx18_writel(cx, IRQ_HPU_TO_APU,     &cx->scb->hpu2apu_irq);
	cx18_writel(cx, IRQ_APU_TO_HPU_ACK, &cx->scb->apu2hpu_irq_ack);
	cx18_writel(cx, IRQ_PPU_TO_APU,     &cx->scb->ppu2apu_irq);
	cx18_writel(cx, IRQ_APU_TO_PPU_ACK, &cx->scb->apu2ppu_irq_ack);
	cx18_writel(cx, IRQ_EPU_TO_APU,     &cx->scb->epu2apu_irq);
	cx18_writel(cx, IRQ_APU_TO_EPU_ACK, &cx->scb->apu2epu_irq_ack);

	cx18_writel(cx, IRQ_CPU_TO_HPU,     &cx->scb->cpu2hpu_irq);
	cx18_writel(cx, IRQ_HPU_TO_CPU_ACK, &cx->scb->hpu2cpu_irq_ack);
	cx18_writel(cx, IRQ_APU_TO_HPU,     &cx->scb->apu2hpu_irq);
	cx18_writel(cx, IRQ_HPU_TO_APU_ACK, &cx->scb->hpu2apu_irq_ack);
	cx18_writel(cx, IRQ_PPU_TO_HPU,     &cx->scb->ppu2hpu_irq);
	cx18_writel(cx, IRQ_HPU_TO_PPU_ACK, &cx->scb->hpu2ppu_irq_ack);
	cx18_writel(cx, IRQ_EPU_TO_HPU,     &cx->scb->epu2hpu_irq);
	cx18_writel(cx, IRQ_HPU_TO_EPU_ACK, &cx->scb->hpu2epu_irq_ack);

	cx18_writel(cx, IRQ_CPU_TO_PPU,     &cx->scb->cpu2ppu_irq);
	cx18_writel(cx, IRQ_PPU_TO_CPU_ACK, &cx->scb->ppu2cpu_irq_ack);
	cx18_writel(cx, IRQ_APU_TO_PPU,     &cx->scb->apu2ppu_irq);
	cx18_writel(cx, IRQ_PPU_TO_APU_ACK, &cx->scb->ppu2apu_irq_ack);
	cx18_writel(cx, IRQ_HPU_TO_PPU,     &cx->scb->hpu2ppu_irq);
	cx18_writel(cx, IRQ_PPU_TO_HPU_ACK, &cx->scb->ppu2hpu_irq_ack);
	cx18_writel(cx, IRQ_EPU_TO_PPU,     &cx->scb->epu2ppu_irq);
	cx18_writel(cx, IRQ_PPU_TO_EPU_ACK, &cx->scb->ppu2epu_irq_ack);

	cx18_writel(cx, IRQ_CPU_TO_EPU,     &cx->scb->cpu2epu_irq);
	cx18_writel(cx, IRQ_EPU_TO_CPU_ACK, &cx->scb->epu2cpu_irq_ack);
	cx18_writel(cx, IRQ_APU_TO_EPU,     &cx->scb->apu2epu_irq);
	cx18_writel(cx, IRQ_EPU_TO_APU_ACK, &cx->scb->epu2apu_irq_ack);
	cx18_writel(cx, IRQ_HPU_TO_EPU,     &cx->scb->hpu2epu_irq);
	cx18_writel(cx, IRQ_EPU_TO_HPU_ACK, &cx->scb->epu2hpu_irq_ack);
	cx18_writel(cx, IRQ_PPU_TO_EPU,     &cx->scb->ppu2epu_irq);
	cx18_writel(cx, IRQ_EPU_TO_PPU_ACK, &cx->scb->epu2ppu_irq_ack);

	cx18_writel(cx, SCB_OFFSET + offsetof(struct cx18_scb, apu2cpu_mb),
			&cx->scb->apu2cpu_mb_offset);
	cx18_writel(cx, SCB_OFFSET + offsetof(struct cx18_scb, hpu2cpu_mb),
			&cx->scb->hpu2cpu_mb_offset);
	cx18_writel(cx, SCB_OFFSET + offsetof(struct cx18_scb, ppu2cpu_mb),
			&cx->scb->ppu2cpu_mb_offset);
	cx18_writel(cx, SCB_OFFSET + offsetof(struct cx18_scb, epu2cpu_mb),
			&cx->scb->epu2cpu_mb_offset);
	cx18_writel(cx, SCB_OFFSET + offsetof(struct cx18_scb, cpu2apu_mb),
			&cx->scb->cpu2apu_mb_offset);
	cx18_writel(cx, SCB_OFFSET + offsetof(struct cx18_scb, hpu2apu_mb),
			&cx->scb->hpu2apu_mb_offset);
	cx18_writel(cx, SCB_OFFSET + offsetof(struct cx18_scb, ppu2apu_mb),
			&cx->scb->ppu2apu_mb_offset);
	cx18_writel(cx, SCB_OFFSET + offsetof(struct cx18_scb, epu2apu_mb),
			&cx->scb->epu2apu_mb_offset);
	cx18_writel(cx, SCB_OFFSET + offsetof(struct cx18_scb, cpu2hpu_mb),
			&cx->scb->cpu2hpu_mb_offset);
	cx18_writel(cx, SCB_OFFSET + offsetof(struct cx18_scb, apu2hpu_mb),
			&cx->scb->apu2hpu_mb_offset);
	cx18_writel(cx, SCB_OFFSET + offsetof(struct cx18_scb, ppu2hpu_mb),
			&cx->scb->ppu2hpu_mb_offset);
	cx18_writel(cx, SCB_OFFSET + offsetof(struct cx18_scb, epu2hpu_mb),
			&cx->scb->epu2hpu_mb_offset);
	cx18_writel(cx, SCB_OFFSET + offsetof(struct cx18_scb, cpu2ppu_mb),
			&cx->scb->cpu2ppu_mb_offset);
	cx18_writel(cx, SCB_OFFSET + offsetof(struct cx18_scb, apu2ppu_mb),
			&cx->scb->apu2ppu_mb_offset);

Annotation

• Immediate include surface: `cx18-driver.h`, `cx18-io.h`, `cx18-scb.h`.
• Detected declarations: `function Copyright`.
• Atlas domain: Driver Families / drivers/media.
• Implementation status: source implementation candidate.

Implementation Notes

• This generated page is the file-by-file coverage layer; curated subsystem chapters should link here when they synthesize a multi-file control flow.
• Core OS pages should be promoted from atlas-only to deep-reviewed when they explain data structures, invariants, locking, lifecycle, and C implementation snippets.
• Driver-family pages are intentionally pattern-oriented unless they are part of the selected PCIe/NVMe representative device path.