drivers/net/ethernet/8390/hydra.c

Source file repositories/reference/linux-study-clean/drivers/net/ethernet/8390/hydra.c

File Facts

System
Linux kernel
Corpus path
drivers/net/ethernet/8390/hydra.c
Extension
.c
Size
7548 bytes
Lines
275
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 hydra_netdev_ops = {
	.ndo_open		= hydra_open,
	.ndo_stop		= hydra_close,

	.ndo_start_xmit		= __ei_start_xmit,
	.ndo_tx_timeout		= __ei_tx_timeout,
	.ndo_get_stats		= __ei_get_stats,
	.ndo_set_rx_mode	= __ei_set_multicast_list,
	.ndo_validate_addr	= eth_validate_addr,
	.ndo_set_mac_address	= eth_mac_addr,
#ifdef CONFIG_NET_POLL_CONTROLLER
	.ndo_poll_controller	= __ei_poll,
#endif
};

static int hydra_init(struct zorro_dev *z)
{
    struct net_device *dev;
    unsigned long board = (unsigned long)ZTWO_VADDR(z->resource.start);
    unsigned long ioaddr = board+HYDRA_NIC_BASE;
    const char name[] = "NE2000";
    int start_page, stop_page;
    u8 macaddr[ETH_ALEN];
    int j;
    int err;

    static u32 hydra_offsets[16] = {
	0x00, 0x02, 0x04, 0x06, 0x08, 0x0a, 0x0c, 0x0e,
	0x10, 0x12, 0x14, 0x16, 0x18, 0x1a, 0x1c, 0x1e,
    };

    dev = ____alloc_ei_netdev(0);
    if (!dev)
	return -ENOMEM;

    for (j = 0; j < ETH_ALEN; j++)
	macaddr[j] = *((u8 *)(board + HYDRA_ADDRPROM + 2*j));
    eth_hw_addr_set(dev, macaddr);

    /* We must set the 8390 for word mode. */
    z_writeb(0x4b, ioaddr + NE_EN0_DCFG);
    start_page = NESM_START_PG;
    stop_page = NESM_STOP_PG;

    dev->base_addr = ioaddr;
    dev->irq = IRQ_AMIGA_PORTS;

    /* Install the Interrupt handler */
    if (request_irq(IRQ_AMIGA_PORTS, __ei_interrupt, IRQF_SHARED, "Hydra Ethernet",
		    dev)) {
	free_netdev(dev);
	return -EAGAIN;
    }

    ei_status.name = name;
    ei_status.tx_start_page = start_page;
    ei_status.stop_page = stop_page;
    ei_status.word16 = 1;
    ei_status.bigendian = 1;

    ei_status.rx_start_page = start_page + TX_PAGES;

    ei_status.reset_8390 = hydra_reset_8390;
    ei_status.block_input = hydra_block_input;
    ei_status.block_output = hydra_block_output;
    ei_status.get_8390_hdr = hydra_get_8390_hdr;
    ei_status.reg_offset = hydra_offsets;

    dev->netdev_ops = &hydra_netdev_ops;
    __NS8390_init(dev, 0);

    err = register_netdev(dev);
    if (err) {
	free_irq(IRQ_AMIGA_PORTS, dev);
	free_netdev(dev);
	return err;
    }

    zorro_set_drvdata(z, dev);

    pr_info("%s: Hydra at %pR, address %pM (hydra.c " HYDRA_VERSION ")\n",
	    dev->name, &z->resource, dev->dev_addr);

    return 0;
}

static int hydra_open(struct net_device *dev)
{
    __ei_open(dev);
    return 0;

Annotation

Implementation Notes