apm/xgene-v2/enet.c

0001 // SPDX-License-Identifier: GPL-2.0-or-later
0002 /*
0003  * Applied Micro X-Gene SoC Ethernet v2 Driver
0004  *
0005  * Copyright (c) 2017, Applied Micro Circuits Corporation
0006  * Author(s): Iyappan Subramanian <isubramanian@apm.com>
0007  *        Keyur Chudgar <kchudgar@apm.com>
0008  */
0009
0010 #include "main.h"
0011
0012 void xge_wr_csr(struct xge_pdata *pdata, u32 offset, u32 val)
0013 {
0014     void __iomem *addr = pdata->resources.base_addr + offset;
0015
0016     iowrite32(val, addr);
0017 }
0018
0019 u32 xge_rd_csr(struct xge_pdata *pdata, u32 offset)
0020 {
0021     void __iomem *addr = pdata->resources.base_addr + offset;
0022
0023     return ioread32(addr);
0024 }
0025
0026 int xge_port_reset(struct net_device *ndev)
0027 {
0028     struct xge_pdata *pdata = netdev_priv(ndev);
0029     struct device *dev = &pdata->pdev->dev;
0030     u32 data, wait = 10;
0031
0032     xge_wr_csr(pdata, ENET_CLKEN, 0x3);
0033     xge_wr_csr(pdata, ENET_SRST, 0xf);
0034     xge_wr_csr(pdata, ENET_SRST, 0);
0035     xge_wr_csr(pdata, CFG_MEM_RAM_SHUTDOWN, 1);
0036     xge_wr_csr(pdata, CFG_MEM_RAM_SHUTDOWN, 0);
0037
0038     do {
0039         usleep_range(100, 110);
0040         data = xge_rd_csr(pdata, BLOCK_MEM_RDY);
0041     } while (data != MEM_RDY && wait--);
0042
0043     if (data != MEM_RDY) {
0044         dev_err(dev, "ECC init failed: %x\n", data);
0045         return -ETIMEDOUT;
0046     }
0047
0048     xge_wr_csr(pdata, ENET_SHIM, DEVM_ARAUX_COH | DEVM_AWAUX_COH);
0049
0050     return 0;
0051 }
0052
0053 static void xge_traffic_resume(struct net_device *ndev)
0054 {
0055     struct xge_pdata *pdata = netdev_priv(ndev);
0056
0057     xge_wr_csr(pdata, CFG_FORCE_LINK_STATUS_EN, 1);
0058     xge_wr_csr(pdata, FORCE_LINK_STATUS, 1);
0059
0060     xge_wr_csr(pdata, CFG_LINK_AGGR_RESUME, 1);
0061     xge_wr_csr(pdata, RX_DV_GATE_REG, 1);
0062 }
0063
0064 void xge_port_init(struct net_device *ndev)
0065 {
0066     struct xge_pdata *pdata = netdev_priv(ndev);
0067
0068     pdata->phy_speed = SPEED_1000;
0069     xge_mac_init(pdata);
0070     xge_traffic_resume(ndev);
0071 }