drivers/net/ethernet/asix/ax88796c_main.c

Source file repositories/reference/linux-study-clean/drivers/net/ethernet/asix/ax88796c_main.c

File Facts

System
Linux kernel
Corpus path
drivers/net/ethernet/asix/ax88796c_main.c
Extension
.c
Size
30408 bytes
Lines
1167
Domain
Driver Families
Bucket
drivers/net
Inferred role
Driver Families: operation-table or driver-model contract
Status
pattern 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

static const struct net_device_ops ax88796c_netdev_ops = {
	.ndo_open		= ax88796c_open,
	.ndo_stop		= ax88796c_close,
	.ndo_start_xmit		= ax88796c_start_xmit,
	.ndo_get_stats64	= ax88796c_get_stats64,
	.ndo_eth_ioctl		= ax88796c_ioctl,
	.ndo_set_mac_address	= eth_mac_addr,
	.ndo_set_features	= ax88796c_set_features,
};

static int ax88796c_hard_reset(struct ax88796c_device *ax_local)
{
	struct device *dev = (struct device *)&ax_local->spi->dev;
	struct gpio_desc *reset_gpio;

	/* reset info */
	reset_gpio = gpiod_get(dev, "reset", 0);
	if (IS_ERR(reset_gpio)) {
		dev_err(dev, "Could not get 'reset' GPIO: %ld", PTR_ERR(reset_gpio));
		return PTR_ERR(reset_gpio);
	}

	/* set reset */
	gpiod_direction_output(reset_gpio, 1);
	msleep(100);
	gpiod_direction_output(reset_gpio, 0);
	gpiod_put(reset_gpio);
	msleep(20);

	return 0;
}

static int ax88796c_probe(struct spi_device *spi)
{
	char phy_id[MII_BUS_ID_SIZE + 3];
	struct ax88796c_device *ax_local;
	struct net_device *ndev;
	u16 temp;
	int ret;

	ndev = devm_alloc_etherdev(&spi->dev, sizeof(*ax_local));
	if (!ndev)
		return -ENOMEM;

	SET_NETDEV_DEV(ndev, &spi->dev);

	ax_local = to_ax88796c_device(ndev);

	dev_set_drvdata(&spi->dev, ax_local);
	ax_local->spi = spi;
	ax_local->ax_spi.spi = spi;

	ax_local->stats =
		devm_netdev_alloc_pcpu_stats(&spi->dev,
					     struct ax88796c_pcpu_stats);
	if (!ax_local->stats)
		return -ENOMEM;

	ax_local->ndev = ndev;
	ax_local->priv_flags |= comp ? AX_CAP_COMP : 0;
	ax_local->msg_enable = msg_enable;
	mutex_init(&ax_local->spi_lock);

	ax_local->mdiobus = devm_mdiobus_alloc(&spi->dev);
	if (!ax_local->mdiobus)
		return -ENOMEM;

	ax_local->mdiobus->priv = ax_local;
	ax_local->mdiobus->read = ax88796c_mdio_read;
	ax_local->mdiobus->write = ax88796c_mdio_write;
	ax_local->mdiobus->name = "ax88976c-mdiobus";
	ax_local->mdiobus->phy_mask = (u32)~BIT(AX88796C_PHY_ID);
	ax_local->mdiobus->parent = &spi->dev;

	snprintf(ax_local->mdiobus->id, MII_BUS_ID_SIZE,
		 "ax88796c-%s.%u", dev_name(&spi->dev), spi_get_chipselect(spi, 0));

	ret = devm_mdiobus_register(&spi->dev, ax_local->mdiobus);
	if (ret < 0) {
		dev_err(&spi->dev, "Could not register MDIO bus\n");
		return ret;
	}

	if (netif_msg_probe(ax_local)) {
		dev_info(&spi->dev, "AX88796C-SPI Configuration:\n");
		dev_info(&spi->dev, "    Compression : %s\n",
			 ax_local->priv_flags & AX_CAP_COMP ? "ON" : "OFF");
	}

	ndev->irq = spi->irq;

Annotation

Implementation Notes