drivers/net/ethernet/amd/hplance.c

Source file repositories/reference/linux-study-clean/drivers/net/ethernet/amd/hplance.c

File Facts

System
Linux kernel
Corpus path
drivers/net/ethernet/amd/hplance.c
Extension
.c
Size
6808 bytes
Lines
239
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 hplance_netdev_ops = {
	.ndo_open		= hplance_open,
	.ndo_stop		= hplance_close,
	.ndo_start_xmit		= lance_start_xmit,
	.ndo_set_rx_mode	= lance_set_multicast,
	.ndo_validate_addr	= eth_validate_addr,
	.ndo_set_mac_address	= eth_mac_addr,
#ifdef CONFIG_NET_POLL_CONTROLLER
	.ndo_poll_controller	= lance_poll,
#endif
};

/* Find all the HP Lance boards and initialise them... */
static int hplance_init_one(struct dio_dev *d, const struct dio_device_id *ent)
{
	struct net_device *dev;
	int err = -ENOMEM;

	dev = alloc_etherdev(sizeof(struct hplance_private));
	if (!dev)
		goto out;

	err = -EBUSY;
	if (!request_mem_region(dio_resource_start(d),
				dio_resource_len(d), d->name))
		goto out_free_netdev;

	hplance_init(dev, d);
	err = register_netdev(dev);
	if (err)
		goto out_release_mem_region;

	dio_set_drvdata(d, dev);

	printk(KERN_INFO "%s: %s; select code %d, addr %pM, irq %d\n",
	       dev->name, d->name, d->scode, dev->dev_addr, d->ipl);

	return 0;

 out_release_mem_region:
	release_mem_region(dio_resource_start(d), dio_resource_len(d));
 out_free_netdev:
	free_netdev(dev);
 out:
	return err;
}

static void hplance_remove_one(struct dio_dev *d)
{
	struct net_device *dev = dio_get_drvdata(d);

	unregister_netdev(dev);
	release_mem_region(dio_resource_start(d), dio_resource_len(d));
	free_netdev(dev);
}

/* Initialise a single lance board at the given DIO device */
static void hplance_init(struct net_device *dev, struct dio_dev *d)
{
	unsigned long va = (d->resource.start + DIO_VIRADDRBASE);
	struct hplance_private *lp;
	u8 addr[ETH_ALEN];
	int i;

	/* reset the board */
	out_8(va + DIO_IDOFF, 0xff);
	udelay(100);                              /* ariba! ariba! udelay! udelay! */

	/* Fill the dev fields */
	dev->base_addr = va;
	dev->netdev_ops = &hplance_netdev_ops;
	dev->dma = 0;

	for (i = 0; i < 6; i++) {
		/* The NVRAM holds our ethernet address, one nibble per byte,
		 * at bytes NVRAMOFF+1,3,5,7,9...
		 */
		addr[i] = ((in_8(va + HPLANCE_NVRAMOFF + i*4 + 1) & 0xF) << 4)
			| (in_8(va + HPLANCE_NVRAMOFF + i*4 + 3) & 0xF);
	}
	eth_hw_addr_set(dev, addr);

	lp = netdev_priv(dev);
	lp->lance.name = d->name;
	lp->lance.base = va;
	lp->lance.init_block = (struct lance_init_block *)(va + HPLANCE_MEMOFF); /* CPU addr */
	lp->lance.lance_init_block = NULL;              /* LANCE addr of same RAM */
	lp->lance.busmaster_regval = LE_C3_BSWP;        /* we're bigendian */
	lp->lance.irq = d->ipl;
	lp->lance.writerap = hplance_writerap;

Annotation

Implementation Notes