drivers/net/ethernet/freescale/fs_enet/mac-fcc.c

Source file repositories/reference/linux-study-clean/drivers/net/ethernet/freescale/fs_enet/mac-fcc.c

File Facts

System
Linux kernel
Corpus path
drivers/net/ethernet/freescale/fs_enet/mac-fcc.c
Extension
.c
Size
15256 bytes
Lines
579
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

netdev_mc_count(dev) > FCC_MAX_MULTICAST_ADDRS) {

		W32(ep, fen_gaddrh, 0xffffffff);
		W32(ep, fen_gaddrl, 0xffffffff);
	}

	/* read back */
	fep->fcc.gaddrh = R32(ep, fen_gaddrh);
	fep->fcc.gaddrl = R32(ep, fen_gaddrl);
}

static void set_multicast_list(struct net_device *dev)
{
	struct netdev_hw_addr *ha;

	if ((dev->flags & IFF_PROMISC) == 0) {
		set_multicast_start(dev);
		netdev_for_each_mc_addr(ha, dev)
			set_multicast_one(dev, ha->addr);
		set_multicast_finish(dev);
	} else
		set_promiscuous_mode(dev);
}

static void restart(struct net_device *dev, phy_interface_t interface,
		    int speed, int duplex)
{
	struct fs_enet_private *fep = netdev_priv(dev);
	const struct fs_platform_info *fpi = fep->fpi;
	fcc_t __iomem *fccp = fep->fcc.fccp;
	fcc_c_t __iomem *fcccp = fep->fcc.fcccp;
	fcc_enet_t __iomem *ep = fep->fcc.ep;
	dma_addr_t rx_bd_base_phys, tx_bd_base_phys;
	u16 paddrh, paddrm, paddrl;
	const unsigned char *mac;
	int i;

	C32(fccp, fcc_gfmr, FCC_GFMR_ENR | FCC_GFMR_ENT);

	/* clear everything (slow & steady does it) */
	for (i = 0; i < sizeof(*ep); i++)
		out_8((u8 __iomem *)ep + i, 0);

	/* get physical address */
	rx_bd_base_phys = fep->ring_mem_addr;
	tx_bd_base_phys = rx_bd_base_phys + sizeof(cbd_t) * fpi->rx_ring;

	/* point to bds */
	W32(ep, fen_genfcc.fcc_rbase, rx_bd_base_phys);
	W32(ep, fen_genfcc.fcc_tbase, tx_bd_base_phys);

	/* Set maximum bytes per receive buffer.
	 * It must be a multiple of 32.
	 */
	W16(ep, fen_genfcc.fcc_mrblr, PKT_MAXBLR_SIZE);

	W32(ep, fen_genfcc.fcc_rstate, (CPMFCR_GBL | CPMFCR_EB) << 24);
	W32(ep, fen_genfcc.fcc_tstate, (CPMFCR_GBL | CPMFCR_EB) << 24);

	/* Allocate space in the reserved FCC area of DPRAM for the
	 * internal buffers.  No one uses this space (yet), so we
	 * can do this.  Later, we will add resource management for
	 * this area.
	 */

	W16(ep, fen_genfcc.fcc_riptr, fpi->dpram_offset);
	W16(ep, fen_genfcc.fcc_tiptr, fpi->dpram_offset + 32);

	W16(ep, fen_padptr, fpi->dpram_offset + 64);

	/* fill with special symbol...  */
	memset_io(fep->fcc.mem + fpi->dpram_offset + 64, 0x88, 32);

	W32(ep, fen_genfcc.fcc_rbptr, 0);
	W32(ep, fen_genfcc.fcc_tbptr, 0);
	W32(ep, fen_genfcc.fcc_rcrc, 0);
	W32(ep, fen_genfcc.fcc_tcrc, 0);
	W16(ep, fen_genfcc.fcc_res1, 0);
	W32(ep, fen_genfcc.fcc_res2, 0);

	/* no CAM */
	W32(ep, fen_camptr, 0);

	/* Set CRC preset and mask */
	W32(ep, fen_cmask, 0xdebb20e3);
	W32(ep, fen_cpres, 0xffffffff);

	W32(ep, fen_crcec, 0);		/* CRC Error counter       */
	W32(ep, fen_alec, 0);		/* alignment error counter */
	W32(ep, fen_disfc, 0);		/* discard frame counter   */

Annotation

Implementation Notes