2 * Applied Micro X-Gene SoC Ethernet v2 Driver
4 * Copyright (c) 2017, Applied Micro Circuits Corporation
5 * Author(s): Iyappan Subramanian <isubramanian@apm.com>
6 * Keyur Chudgar <kchudgar@apm.com>
8 * This program is free software; you can redistribute it and/or modify it
9 * under the terms of the GNU General Public License as published by the
10 * Free Software Foundation; either version 2 of the License, or (at your
11 * option) any later version.
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
18 * You should have received a copy of the GNU General Public License
19 * along with this program. If not, see <http://www.gnu.org/licenses/>.
24 void xge_wr_csr(struct xge_pdata *pdata, u32 offset, u32 val)
26 void __iomem *addr = pdata->resources.base_addr + offset;
31 u32 xge_rd_csr(struct xge_pdata *pdata, u32 offset)
33 void __iomem *addr = pdata->resources.base_addr + offset;
35 return ioread32(addr);
38 int xge_port_reset(struct net_device *ndev)
40 struct xge_pdata *pdata = netdev_priv(ndev);
41 struct device *dev = &pdata->pdev->dev;
44 xge_wr_csr(pdata, ENET_CLKEN, 0x3);
45 xge_wr_csr(pdata, ENET_SRST, 0xf);
46 xge_wr_csr(pdata, ENET_SRST, 0);
47 xge_wr_csr(pdata, CFG_MEM_RAM_SHUTDOWN, 1);
48 xge_wr_csr(pdata, CFG_MEM_RAM_SHUTDOWN, 0);
51 usleep_range(100, 110);
52 data = xge_rd_csr(pdata, BLOCK_MEM_RDY);
53 } while (data != MEM_RDY && wait--);
55 if (data != MEM_RDY) {
56 dev_err(dev, "ECC init failed: %x\n", data);
60 xge_wr_csr(pdata, ENET_SHIM, DEVM_ARAUX_COH | DEVM_AWAUX_COH);
65 static void xge_traffic_resume(struct net_device *ndev)
67 struct xge_pdata *pdata = netdev_priv(ndev);
69 xge_wr_csr(pdata, CFG_FORCE_LINK_STATUS_EN, 1);
70 xge_wr_csr(pdata, FORCE_LINK_STATUS, 1);
72 xge_wr_csr(pdata, CFG_LINK_AGGR_RESUME, 1);
73 xge_wr_csr(pdata, RX_DV_GATE_REG, 1);
76 void xge_port_init(struct net_device *ndev)
78 struct xge_pdata *pdata = netdev_priv(ndev);
80 pdata->phy_speed = SPEED_1000;
82 xge_traffic_resume(ndev);