drivers/net/phy/cicada.c

Source file repositories/reference/linux-study-clean/drivers/net/phy/cicada.c

File Facts

System
Linux kernel
Corpus path
drivers/net/phy/cicada.c
Extension
.c
Size
3642 bytes
Lines
155
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+
/*
 * drivers/net/phy/cicada.c
 *
 * Driver for Cicada PHYs
 *
 * Author: Andy Fleming
 *
 * Copyright (c) 2004 Freescale Semiconductor, Inc.
 */
#include <linux/kernel.h>
#include <linux/string.h>
#include <linux/errno.h>
#include <linux/unistd.h>
#include <linux/interrupt.h>
#include <linux/init.h>
#include <linux/delay.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <linux/skbuff.h>
#include <linux/spinlock.h>
#include <linux/mm.h>
#include <linux/module.h>
#include <linux/mii.h>
#include <linux/ethtool.h>
#include <linux/phy.h>

#include <linux/io.h>
#include <asm/irq.h>
#include <linux/uaccess.h>

/* Cicada Extended Control Register 1 */
#define MII_CIS8201_EXT_CON1           0x17
#define MII_CIS8201_EXTCON1_INIT       0x0000

/* Cicada Interrupt Mask Register */
#define MII_CIS8201_IMASK		0x19
#define MII_CIS8201_IMASK_IEN		0x8000
#define MII_CIS8201_IMASK_SPEED	0x4000
#define MII_CIS8201_IMASK_LINK		0x2000
#define MII_CIS8201_IMASK_DUPLEX	0x1000
#define MII_CIS8201_IMASK_MASK		0xf000

/* Cicada Interrupt Status Register */
#define MII_CIS8201_ISTAT		0x1a
#define MII_CIS8201_ISTAT_STATUS	0x8000
#define MII_CIS8201_ISTAT_SPEED	0x4000
#define MII_CIS8201_ISTAT_LINK		0x2000
#define MII_CIS8201_ISTAT_DUPLEX	0x1000

/* Cicada Auxiliary Control/Status Register */
#define MII_CIS8201_AUX_CONSTAT        0x1c
#define MII_CIS8201_AUXCONSTAT_INIT    0x0004
#define MII_CIS8201_AUXCONSTAT_DUPLEX  0x0020
#define MII_CIS8201_AUXCONSTAT_SPEED   0x0018
#define MII_CIS8201_AUXCONSTAT_GBIT    0x0010
#define MII_CIS8201_AUXCONSTAT_100     0x0008

MODULE_DESCRIPTION("Cicadia PHY driver");
MODULE_AUTHOR("Andy Fleming");
MODULE_LICENSE("GPL");

static int cis820x_config_init(struct phy_device *phydev)
{
	int err;

	err = phy_write(phydev, MII_CIS8201_AUX_CONSTAT,
			MII_CIS8201_AUXCONSTAT_INIT);

	if (err < 0)
		return err;

	err = phy_write(phydev, MII_CIS8201_EXT_CON1,
			MII_CIS8201_EXTCON1_INIT);

	return err;
}

static int cis820x_ack_interrupt(struct phy_device *phydev)
{
	int err = phy_read(phydev, MII_CIS8201_ISTAT);

	return (err < 0) ? err : 0;
}

static int cis820x_config_intr(struct phy_device *phydev)
{
	int err;

	if (phydev->interrupts == PHY_INTERRUPT_ENABLED) {

Annotation

Implementation Notes