diff options
Diffstat (limited to 'drivers/net/ethernet/xilinx/xilinx_tsn_ep.c')
| -rw-r--r-- | drivers/net/ethernet/xilinx/xilinx_tsn_ep.c | 161 |
1 files changed, 161 insertions, 0 deletions
diff --git a/drivers/net/ethernet/xilinx/xilinx_tsn_ep.c b/drivers/net/ethernet/xilinx/xilinx_tsn_ep.c new file mode 100644 index 000000000000..bcd6c737bc27 --- /dev/null +++ b/drivers/net/ethernet/xilinx/xilinx_tsn_ep.c @@ -0,0 +1,161 @@ +/* + * Xilinx FPGA Xilinx TSN End point driver. + * + * Copyright (c) 2017 Xilinx Pvt., Ltd + * + * Author: Saurabh Sengar <saurabhs@xilinx.com> + * + * This software is licensed under the terms of the GNU General Public + * License version 2, as published by the Free Software Foundation, and + * may be copied, distributed, and modified under those terms. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#include <linux/etherdevice.h> +#include <linux/module.h> +#include <linux/netdevice.h> +#include <linux/of_platform.h> +#include <linux/of_address.h> +#include <linux/skbuff.h> + +#include "xilinx_axienet.h" + +/** + * tsn_ep_ioctl - TSN endpoint ioctl interface. + * @dev: Pointer to the net_device structure + * @rq: Socket ioctl interface request structure + * @cmd: Ioctl case + * + * Return: 0 on success, Non-zero error value on failure. + * + * This is the ioctl interface for TSN end point. Currently this + * supports only gate programming. + */ +static int tsn_ep_ioctl(struct net_device *dev, struct ifreq *rq, int cmd) +{ + switch (cmd) { +#ifdef CONFIG_XILINX_TSN_QBV + case SIOCCHIOCTL: + return axienet_set_schedule(dev, rq->ifr_data); + case SIOC_GET_SCHED: + return axienet_get_schedule(dev, rq->ifr_data); +#endif + default: + return -EOPNOTSUPP; + } +} + +/** + * tsn_ep_xmit - TSN endpoint xmit routine. + * @skb: Packet data + * @dev: Pointer to the net_device structure + * + * Return: Always returns NETDEV_TX_OK. + * + * This is dummy xmit function for endpoint as all the data path is assumed to + * be connected by TEMAC1 as per linux view + */ +static int tsn_ep_xmit(struct sk_buff *skb, struct net_device *dev) +{ + kfree_skb(skb); + return NETDEV_TX_OK; +} + +static const struct net_device_ops ep_netdev_ops = { + .ndo_do_ioctl = tsn_ep_ioctl, + .ndo_start_xmit = tsn_ep_xmit, +}; + +static const struct of_device_id tsn_ep_of_match[] = { + { .compatible = "xlnx,tsn-ep"}, + {}, +}; + +MODULE_DEVICE_TABLE(of, tsn_ep_of_match); + +/** + * tsn_ep_probe - TSN ep pointer probe function. + * @pdev: Pointer to platform device structure. + * + * Return: 0, on success + * Non-zero error value on failure. + * + * This is the probe routine for TSN endpoint driver. + */ +static int tsn_ep_probe(struct platform_device *pdev) +{ + int ret = 0; + struct axienet_local *lp; + struct net_device *ndev; + struct resource *ethres; + u16 num_tc = 0; + + ndev = alloc_netdev(0, "ep", NET_NAME_UNKNOWN, ether_setup); + if (!ndev) + return -ENOMEM; + + platform_set_drvdata(pdev, ndev); + + SET_NETDEV_DEV(ndev, &pdev->dev); + ndev->netdev_ops = &ep_netdev_ops; + + lp = netdev_priv(ndev); + lp->ndev = ndev; + lp->dev = &pdev->dev; + lp->options = XAE_OPTION_DEFAULTS; + + ret = of_property_read_u16( + pdev->dev.of_node, "xlnx,num-tc", &num_tc); + if (ret || (num_tc != 2 && num_tc != 3)) + lp->num_tc = XAE_MAX_TSN_TC; + else + lp->num_tc = num_tc; + /* Map device registers */ + ethres = platform_get_resource(pdev, IORESOURCE_MEM, 0); + lp->regs = devm_ioremap_resource(&pdev->dev, ethres); + if (IS_ERR(lp->regs)) { + ret = PTR_ERR(lp->regs); + goto free_netdev; + } + + ret = register_netdev(lp->ndev); + if (ret) + dev_err(lp->dev, "register_netdev() error (%i)\n", ret); + + return ret; + +free_netdev: + free_netdev(ndev); + + return ret; +} + +static int tsn_ep_remove(struct platform_device *pdev) +{ + struct net_device *ndev = platform_get_drvdata(pdev); + + unregister_netdev(ndev); + + free_netdev(ndev); + + return 0; +} + +static struct platform_driver tsn_ep_driver = { + .probe = tsn_ep_probe, + .remove = tsn_ep_remove, + .driver = { + .name = "tsn_ep_axienet", + .of_match_table = tsn_ep_of_match, + }, +}; + +module_platform_driver(tsn_ep_driver); + +MODULE_DESCRIPTION("Xilinx Axi Ethernet driver"); +MODULE_AUTHOR("Xilinx"); +MODULE_LICENSE("GPL v2"); |