drivers/net/ethernet/altera/altera_utils.c

Source file repositories/reference/linux-study-clean/drivers/net/ethernet/altera/altera_utils.c

File Facts

System
Linux kernel
Corpus path
drivers/net/ethernet/altera/altera_utils.c
Extension
.c
Size
813 bytes
Lines
34
Domain
Driver Families
Bucket
drivers/net
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-only
/* Altera TSE SGDMA and MSGDMA Linux driver
 * Copyright (C) 2014 Altera Corporation. All rights reserved
 */

#include "altera_tse.h"
#include "altera_utils.h"

void tse_set_bit(void __iomem *ioaddr, size_t offs, u32 bit_mask)
{
	u32 value = csrrd32(ioaddr, offs);
	value |= bit_mask;
	csrwr32(value, ioaddr, offs);
}

void tse_clear_bit(void __iomem *ioaddr, size_t offs, u32 bit_mask)
{
	u32 value = csrrd32(ioaddr, offs);
	value &= ~bit_mask;
	csrwr32(value, ioaddr, offs);
}

int tse_bit_is_set(void __iomem *ioaddr, size_t offs, u32 bit_mask)
{
	u32 value = csrrd32(ioaddr, offs);
	return (value & bit_mask) ? 1 : 0;
}

int tse_bit_is_clear(void __iomem *ioaddr, size_t offs, u32 bit_mask)
{
	u32 value = csrrd32(ioaddr, offs);
	return (value & bit_mask) ? 0 : 1;
}

Annotation

Implementation Notes