drivers/net/ethernet/ti/icssg/icssg_prueth_sr1.c

Source file repositories/reference/linux-study-clean/drivers/net/ethernet/ti/icssg/icssg_prueth_sr1.c

File Facts

System
Linux kernel
Corpus path
drivers/net/ethernet/ti/icssg/icssg_prueth_sr1.c
Extension
.c
Size
33321 bytes
Lines
1244
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 emac_netdev_ops = {
	.ndo_open = emac_ndo_open,
	.ndo_stop = emac_ndo_stop,
	.ndo_start_xmit = icssg_ndo_start_xmit,
	.ndo_set_mac_address = eth_mac_addr,
	.ndo_validate_addr = eth_validate_addr,
	.ndo_tx_timeout = icssg_ndo_tx_timeout,
	.ndo_set_rx_mode = emac_ndo_set_rx_mode_sr1,
	.ndo_eth_ioctl = phy_do_ioctl,
	.ndo_get_stats64 = icssg_ndo_get_stats64,
	.ndo_get_phys_port_name = icssg_ndo_get_phys_port_name,
	.ndo_hwtstamp_get = icssg_ndo_get_ts_config,
	.ndo_hwtstamp_set = icssg_ndo_set_ts_config,
};

static int prueth_netdev_init(struct prueth *prueth,
			      struct device_node *eth_node)
{
	struct prueth_emac *emac;
	struct net_device *ndev;
	enum prueth_port port;
	enum prueth_mac mac;
	/* Only enable one TX channel due to timeouts when
	 * using multiple channels */
	int num_tx_chn = 1;
	int ret;

	port = prueth_node_port(eth_node);
	if (port == PRUETH_PORT_INVALID)
		return -EINVAL;

	mac = prueth_node_mac(eth_node);
	if (mac == PRUETH_MAC_INVALID)
		return -EINVAL;

	ndev = alloc_etherdev_mq(sizeof(*emac), num_tx_chn);
	if (!ndev)
		return -ENOMEM;

	emac = netdev_priv(ndev);
	emac->is_sr1 = 1;
	emac->prueth = prueth;
	emac->ndev = ndev;
	emac->port_id = port;

	INIT_DELAYED_WORK(&emac->stats_work, icssg_stats_work_handler);

	ret = pruss_request_mem_region(prueth->pruss,
				       port == PRUETH_PORT_MII0 ?
				       PRUSS_MEM_DRAM0 : PRUSS_MEM_DRAM1,
				       &emac->dram);
	if (ret) {
		dev_err(prueth->dev, "unable to get DRAM: %d\n", ret);
		ret = -ENOMEM;
		goto free_ndev;
	}

	/* SR1.0 uses a dedicated high priority channel
	 * to send commands to the firmware
	 */
	emac->tx_ch_num = 2;

	SET_NETDEV_DEV(ndev, prueth->dev);
	spin_lock_init(&emac->lock);
	mutex_init(&emac->cmd_lock);

	emac->phy_node = of_parse_phandle(eth_node, "phy-handle", 0);
	if (!emac->phy_node && !of_phy_is_fixed_link(eth_node)) {
		dev_err(prueth->dev, "couldn't find phy-handle\n");
		ret = -ENODEV;
		goto free;
	} else if (of_phy_is_fixed_link(eth_node)) {
		ret = of_phy_register_fixed_link(eth_node);
		if (ret) {
			dev_err_probe(prueth->dev, ret, "failed to register fixed-link phy\n");
			goto free;
		}

		emac->phy_node = eth_node;
	}

	ret = of_get_phy_mode(eth_node, &emac->phy_if);
	if (ret) {
		dev_err(prueth->dev, "could not get phy-mode property\n");
		goto free;
	}

	if (emac->phy_if != PHY_INTERFACE_MODE_MII &&
	    !phy_interface_mode_is_rgmii(emac->phy_if)) {
		dev_err(prueth->dev, "PHY mode unsupported %s\n", phy_modes(emac->phy_if));

Annotation

Implementation Notes