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
xge_wr_csr(struct xge_pdata * pdata,u32 offset,u32 val)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
xge_rd_csr(struct xge_pdata * pdata,u32 offset)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
xge_port_reset(struct net_device * ndev)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
xge_traffic_resume(struct net_device * ndev)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
xge_port_init(struct net_device * ndev)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 }
72