drivers/net/ethernet/apm/xgene-v2/enet.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  * Applied Micro X-Gene SoC Ethernet v2 Driver
   4  *
   5  * Copyright (c) 2017, Applied Micro Circuits Corporation
   6  * Author(s): Iyappan Subramanian <isubramanian@apm.com>
   7  *            Keyur Chudgar <kchudgar@apm.com>
   8  */
   9
  10 #include "main.h"
  11
  12 void xge_wr_csr(struct xge_pdata *pdata, u32 offset, u32 val)
  13 {
  14         void __iomem *addr = pdata->resources.base_addr + offset;
  15
  16         iowrite32(val, addr);
  17 }
  18
  19 u32 xge_rd_csr(struct xge_pdata *pdata, u32 offset)
  20 {
  21         void __iomem *addr = pdata->resources.base_addr + offset;
  22
  23         return ioread32(addr);
  24 }
  25
  26 int xge_port_reset(struct net_device *ndev)
  27 {
  28         struct xge_pdata *pdata = netdev_priv(ndev);
  29         struct device *dev = &pdata->pdev->dev;
  30         u32 data, wait = 10;
  31
  32         xge_wr_csr(pdata, ENET_CLKEN, 0x3);
  33         xge_wr_csr(pdata, ENET_SRST, 0xf);
  34         xge_wr_csr(pdata, ENET_SRST, 0);
  35         xge_wr_csr(pdata, CFG_MEM_RAM_SHUTDOWN, 1);
  36         xge_wr_csr(pdata, CFG_MEM_RAM_SHUTDOWN, 0);
  37
  38         do {
  39                 usleep_range(100, 110);
  40                 data = xge_rd_csr(pdata, BLOCK_MEM_RDY);
  41         } while (data != MEM_RDY && wait--);
  42
  43         if (data != MEM_RDY) {
  44                 dev_err(dev, "ECC init failed: %x\n", data);
  45                 return -ETIMEDOUT;
  46         }
  47
  48         xge_wr_csr(pdata, ENET_SHIM, DEVM_ARAUX_COH | DEVM_AWAUX_COH);
  49
  50         return 0;
  51 }
  52
  53 static void xge_traffic_resume(struct net_device *ndev)
  54 {
  55         struct xge_pdata *pdata = netdev_priv(ndev);
  56
  57         xge_wr_csr(pdata, CFG_FORCE_LINK_STATUS_EN, 1);
  58         xge_wr_csr(pdata, FORCE_LINK_STATUS, 1);
  59
  60         xge_wr_csr(pdata, CFG_LINK_AGGR_RESUME, 1);
  61         xge_wr_csr(pdata, RX_DV_GATE_REG, 1);
  62 }
  63
  64 void xge_port_init(struct net_device *ndev)
  65 {
  66         struct xge_pdata *pdata = netdev_priv(ndev);
  67
  68         pdata->phy_speed = SPEED_1000;
  69         xge_mac_init(pdata);
  70         xge_traffic_resume(ndev);
  71 }