// SPDX-License-Identifier: GPL-2.0-or-later
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/* Applied Micro X-Gene SoC Ethernet Driver
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*
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* Copyright (c) 2014, Applied Micro Circuits Corporation
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* Authors: Iyappan Subramanian <isubramanian@apm.com>
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* Keyur Chudgar <kchudgar@apm.com>
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*/
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#include "xgene_enet_main.h"
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#include "xgene_enet_hw.h"
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#include "xgene_enet_sgmac.h"
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#include "xgene_enet_xgmac.h"
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static void xgene_enet_wr_csr(struct xgene_enet_pdata *p, u32 offset, u32 val)
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{
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iowrite32(val, p->eth_csr_addr + offset);
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}
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static void xgene_enet_wr_clkrst_csr(struct xgene_enet_pdata *p, u32 offset,
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u32 val)
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{
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iowrite32(val, p->base_addr + offset);
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}
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static void xgene_enet_wr_ring_if(struct xgene_enet_pdata *p,
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u32 offset, u32 val)
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{
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iowrite32(val, p->eth_ring_if_addr + offset);
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}
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static void xgene_enet_wr_diag_csr(struct xgene_enet_pdata *p,
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u32 offset, u32 val)
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{
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iowrite32(val, p->eth_diag_csr_addr + offset);
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}
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static void xgene_enet_wr_mcx_csr(struct xgene_enet_pdata *pdata,
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u32 offset, u32 val)
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{
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void __iomem *addr = pdata->mcx_mac_csr_addr + offset;
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iowrite32(val, addr);
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}
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static u32 xgene_enet_rd_csr(struct xgene_enet_pdata *p, u32 offset)
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{
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return ioread32(p->eth_csr_addr + offset);
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}
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static u32 xgene_enet_rd_diag_csr(struct xgene_enet_pdata *p, u32 offset)
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{
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return ioread32(p->eth_diag_csr_addr + offset);
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}
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static u32 xgene_enet_rd_mcx_csr(struct xgene_enet_pdata *p, u32 offset)
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{
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return ioread32(p->mcx_mac_csr_addr + offset);
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}
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static int xgene_enet_ecc_init(struct xgene_enet_pdata *p)
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{
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struct net_device *ndev = p->ndev;
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u32 data, shutdown;
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int i = 0;
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shutdown = xgene_enet_rd_diag_csr(p, ENET_CFG_MEM_RAM_SHUTDOWN_ADDR);
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data = xgene_enet_rd_diag_csr(p, ENET_BLOCK_MEM_RDY_ADDR);
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if (!shutdown && data == ~0U) {
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netdev_dbg(ndev, "+ ecc_init done, skipping\n");
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return 0;
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}
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xgene_enet_wr_diag_csr(p, ENET_CFG_MEM_RAM_SHUTDOWN_ADDR, 0);
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do {
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usleep_range(100, 110);
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data = xgene_enet_rd_diag_csr(p, ENET_BLOCK_MEM_RDY_ADDR);
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if (data == ~0U)
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return 0;
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} while (++i < 10);
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netdev_err(ndev, "Failed to release memory from shutdown\n");
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return -ENODEV;
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}
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static void xgene_sgmac_get_drop_cnt(struct xgene_enet_pdata *pdata,
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u32 *rx, u32 *tx)
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{
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u32 addr, count;
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addr = (pdata->enet_id != XGENE_ENET1) ?
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XG_MCX_ICM_ECM_DROP_COUNT_REG0_ADDR :
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ICM_ECM_DROP_COUNT_REG0_ADDR + pdata->port_id * OFFSET_4;
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count = xgene_enet_rd_mcx_csr(pdata, addr);
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*rx = ICM_DROP_COUNT(count);
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*tx = ECM_DROP_COUNT(count);
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/* Errata: 10GE_4 - ICM_ECM_DROP_COUNT not clear-on-read */
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addr = (pdata->enet_id != XGENE_ENET1) ?
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XG_MCX_ECM_CONFIG0_REG_0_ADDR :
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ECM_CONFIG0_REG_0_ADDR + pdata->port_id * OFFSET_4;
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xgene_enet_rd_mcx_csr(pdata, addr);
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}
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static void xgene_enet_config_ring_if_assoc(struct xgene_enet_pdata *p)
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{
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u32 val;
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val = (p->enet_id == XGENE_ENET1) ? 0xffffffff : 0;
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xgene_enet_wr_ring_if(p, ENET_CFGSSQMIWQASSOC_ADDR, val);
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xgene_enet_wr_ring_if(p, ENET_CFGSSQMIFPQASSOC_ADDR, val);
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}
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static void xgene_mii_phy_write(struct xgene_enet_pdata *p, u8 phy_id,
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u32 reg, u16 data)
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{
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u32 addr, wr_data, done;
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int i;
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addr = PHY_ADDR(phy_id) | REG_ADDR(reg);
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xgene_enet_wr_mac(p, MII_MGMT_ADDRESS_ADDR, addr);
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wr_data = PHY_CONTROL(data);
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xgene_enet_wr_mac(p, MII_MGMT_CONTROL_ADDR, wr_data);
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for (i = 0; i < 10; i++) {
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done = xgene_enet_rd_mac(p, MII_MGMT_INDICATORS_ADDR);
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if (!(done & BUSY_MASK))
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return;
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usleep_range(10, 20);
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}
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netdev_err(p->ndev, "MII_MGMT write failed\n");
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}
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static u32 xgene_mii_phy_read(struct xgene_enet_pdata *p, u8 phy_id, u32 reg)
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{
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u32 addr, data, done;
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int i;
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addr = PHY_ADDR(phy_id) | REG_ADDR(reg);
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xgene_enet_wr_mac(p, MII_MGMT_ADDRESS_ADDR, addr);
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xgene_enet_wr_mac(p, MII_MGMT_COMMAND_ADDR, READ_CYCLE_MASK);
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for (i = 0; i < 10; i++) {
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done = xgene_enet_rd_mac(p, MII_MGMT_INDICATORS_ADDR);
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if (!(done & BUSY_MASK)) {
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data = xgene_enet_rd_mac(p, MII_MGMT_STATUS_ADDR);
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xgene_enet_wr_mac(p, MII_MGMT_COMMAND_ADDR, 0);
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return data;
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}
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usleep_range(10, 20);
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}
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netdev_err(p->ndev, "MII_MGMT read failed\n");
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return 0;
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}
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static void xgene_sgmac_reset(struct xgene_enet_pdata *p)
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{
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xgene_enet_wr_mac(p, MAC_CONFIG_1_ADDR, SOFT_RESET1);
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xgene_enet_wr_mac(p, MAC_CONFIG_1_ADDR, 0);
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}
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static void xgene_sgmac_set_mac_addr(struct xgene_enet_pdata *p)
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{
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u32 addr0, addr1;
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u8 *dev_addr = p->ndev->dev_addr;
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addr0 = (dev_addr[3] << 24) | (dev_addr[2] << 16) |
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(dev_addr[1] << 8) | dev_addr[0];
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xgene_enet_wr_mac(p, STATION_ADDR0_ADDR, addr0);
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addr1 = xgene_enet_rd_mac(p, STATION_ADDR1_ADDR);
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addr1 |= (dev_addr[5] << 24) | (dev_addr[4] << 16);
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xgene_enet_wr_mac(p, STATION_ADDR1_ADDR, addr1);
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}
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static u32 xgene_enet_link_status(struct xgene_enet_pdata *p)
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{
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u32 data;
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data = xgene_mii_phy_read(p, INT_PHY_ADDR,
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SGMII_BASE_PAGE_ABILITY_ADDR >> 2);
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if (LINK_SPEED(data) == PHY_SPEED_1000)
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p->phy_speed = SPEED_1000;
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else if (LINK_SPEED(data) == PHY_SPEED_100)
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p->phy_speed = SPEED_100;
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else
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p->phy_speed = SPEED_10;
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return data & LINK_UP;
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}
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static void xgene_sgmii_configure(struct xgene_enet_pdata *p)
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{
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xgene_mii_phy_write(p, INT_PHY_ADDR, SGMII_TBI_CONTROL_ADDR >> 2,
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0x8000);
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xgene_mii_phy_write(p, INT_PHY_ADDR, SGMII_CONTROL_ADDR >> 2, 0x9000);
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xgene_mii_phy_write(p, INT_PHY_ADDR, SGMII_TBI_CONTROL_ADDR >> 2, 0);
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}
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static void xgene_sgmii_tbi_control_reset(struct xgene_enet_pdata *p)
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{
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xgene_mii_phy_write(p, INT_PHY_ADDR, SGMII_TBI_CONTROL_ADDR >> 2,
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0x8000);
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xgene_mii_phy_write(p, INT_PHY_ADDR, SGMII_TBI_CONTROL_ADDR >> 2, 0);
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}
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static void xgene_sgmii_reset(struct xgene_enet_pdata *p)
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{
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u32 value;
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if (p->phy_speed == SPEED_UNKNOWN)
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return;
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value = xgene_mii_phy_read(p, INT_PHY_ADDR,
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SGMII_BASE_PAGE_ABILITY_ADDR >> 2);
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if (!(value & LINK_UP))
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xgene_sgmii_tbi_control_reset(p);
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}
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static void xgene_sgmac_set_speed(struct xgene_enet_pdata *p)
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{
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u32 icm0_addr, icm2_addr, debug_addr;
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u32 icm0, icm2, intf_ctl;
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u32 mc2, value;
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xgene_sgmii_reset(p);
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if (p->enet_id == XGENE_ENET1) {
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icm0_addr = ICM_CONFIG0_REG_0_ADDR + p->port_id * OFFSET_8;
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icm2_addr = ICM_CONFIG2_REG_0_ADDR + p->port_id * OFFSET_4;
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debug_addr = DEBUG_REG_ADDR;
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} else {
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icm0_addr = XG_MCX_ICM_CONFIG0_REG_0_ADDR;
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icm2_addr = XG_MCX_ICM_CONFIG2_REG_0_ADDR;
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debug_addr = XG_DEBUG_REG_ADDR;
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}
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icm0 = xgene_enet_rd_mcx_csr(p, icm0_addr);
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icm2 = xgene_enet_rd_mcx_csr(p, icm2_addr);
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mc2 = xgene_enet_rd_mac(p, MAC_CONFIG_2_ADDR);
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intf_ctl = xgene_enet_rd_mac(p, INTERFACE_CONTROL_ADDR);
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switch (p->phy_speed) {
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case SPEED_10:
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ENET_INTERFACE_MODE2_SET(&mc2, 1);
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intf_ctl &= ~(ENET_LHD_MODE | ENET_GHD_MODE);
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CFG_MACMODE_SET(&icm0, 0);
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CFG_WAITASYNCRD_SET(&icm2, 500);
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break;
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case SPEED_100:
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ENET_INTERFACE_MODE2_SET(&mc2, 1);
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intf_ctl &= ~ENET_GHD_MODE;
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intf_ctl |= ENET_LHD_MODE;
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CFG_MACMODE_SET(&icm0, 1);
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CFG_WAITASYNCRD_SET(&icm2, 80);
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break;
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default:
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ENET_INTERFACE_MODE2_SET(&mc2, 2);
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intf_ctl &= ~ENET_LHD_MODE;
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intf_ctl |= ENET_GHD_MODE;
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CFG_MACMODE_SET(&icm0, 2);
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CFG_WAITASYNCRD_SET(&icm2, 16);
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value = xgene_enet_rd_csr(p, debug_addr);
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value |= CFG_BYPASS_UNISEC_TX | CFG_BYPASS_UNISEC_RX;
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xgene_enet_wr_csr(p, debug_addr, value);
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break;
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}
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mc2 |= FULL_DUPLEX2 | PAD_CRC;
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xgene_enet_wr_mac(p, MAC_CONFIG_2_ADDR, mc2);
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xgene_enet_wr_mac(p, INTERFACE_CONTROL_ADDR, intf_ctl);
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xgene_enet_wr_mcx_csr(p, icm0_addr, icm0);
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xgene_enet_wr_mcx_csr(p, icm2_addr, icm2);
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}
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static void xgene_sgmac_set_frame_size(struct xgene_enet_pdata *pdata, int size)
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{
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xgene_enet_wr_mac(pdata, MAX_FRAME_LEN_ADDR, size);
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}
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static void xgene_sgmii_enable_autoneg(struct xgene_enet_pdata *p)
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{
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u32 data, loop = 10;
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xgene_sgmii_configure(p);
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while (loop--) {
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data = xgene_mii_phy_read(p, INT_PHY_ADDR,
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SGMII_STATUS_ADDR >> 2);
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if ((data & AUTO_NEG_COMPLETE) && (data & LINK_STATUS))
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break;
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usleep_range(1000, 2000);
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}
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if (!(data & AUTO_NEG_COMPLETE) || !(data & LINK_STATUS))
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netdev_err(p->ndev, "Auto-negotiation failed\n");
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}
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static void xgene_sgmac_rxtx(struct xgene_enet_pdata *p, u32 bits, bool set)
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{
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u32 data;
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data = xgene_enet_rd_mac(p, MAC_CONFIG_1_ADDR);
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if (set)
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data |= bits;
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else
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data &= ~bits;
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xgene_enet_wr_mac(p, MAC_CONFIG_1_ADDR, data);
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}
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static void xgene_sgmac_flowctl_tx(struct xgene_enet_pdata *p, bool enable)
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{
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xgene_sgmac_rxtx(p, TX_FLOW_EN, enable);
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p->mac_ops->enable_tx_pause(p, enable);
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}
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static void xgene_sgmac_flowctl_rx(struct xgene_enet_pdata *pdata, bool enable)
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{
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xgene_sgmac_rxtx(pdata, RX_FLOW_EN, enable);
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}
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static void xgene_sgmac_init(struct xgene_enet_pdata *p)
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{
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u32 pause_thres_reg, pause_off_thres_reg;
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u32 enet_spare_cfg_reg, rsif_config_reg;
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u32 cfg_bypass_reg, rx_dv_gate_reg;
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u32 data, data1, data2, offset;
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u32 multi_dpf_reg;
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if (!(p->enet_id == XGENE_ENET2 && p->mdio_driver))
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xgene_sgmac_reset(p);
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xgene_sgmii_enable_autoneg(p);
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xgene_sgmac_set_speed(p);
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xgene_sgmac_set_mac_addr(p);
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if (p->enet_id == XGENE_ENET1) {
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enet_spare_cfg_reg = ENET_SPARE_CFG_REG_ADDR;
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rsif_config_reg = RSIF_CONFIG_REG_ADDR;
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cfg_bypass_reg = CFG_BYPASS_ADDR;
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offset = p->port_id * OFFSET_4;
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rx_dv_gate_reg = SG_RX_DV_GATE_REG_0_ADDR + offset;
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} else {
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enet_spare_cfg_reg = XG_ENET_SPARE_CFG_REG_ADDR;
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rsif_config_reg = XG_RSIF_CONFIG_REG_ADDR;
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cfg_bypass_reg = XG_CFG_BYPASS_ADDR;
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rx_dv_gate_reg = XG_MCX_RX_DV_GATE_REG_0_ADDR;
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}
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data = xgene_enet_rd_csr(p, enet_spare_cfg_reg);
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data |= MPA_IDLE_WITH_QMI_EMPTY;
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xgene_enet_wr_csr(p, enet_spare_cfg_reg, data);
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/* Adjust MDC clock frequency */
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data = xgene_enet_rd_mac(p, MII_MGMT_CONFIG_ADDR);
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MGMT_CLOCK_SEL_SET(&data, 7);
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xgene_enet_wr_mac(p, MII_MGMT_CONFIG_ADDR, data);
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/* Enable drop if bufpool not available */
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data = xgene_enet_rd_csr(p, rsif_config_reg);
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data |= CFG_RSIF_FPBUFF_TIMEOUT_EN;
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xgene_enet_wr_csr(p, rsif_config_reg, data);
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/* Configure HW pause frame generation */
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multi_dpf_reg = (p->enet_id == XGENE_ENET1) ? CSR_MULTI_DPF0_ADDR :
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XG_MCX_MULTI_DPF0_ADDR;
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data = xgene_enet_rd_mcx_csr(p, multi_dpf_reg);
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data = (DEF_QUANTA << 16) | (data & 0xffff);
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xgene_enet_wr_mcx_csr(p, multi_dpf_reg, data);
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if (p->enet_id != XGENE_ENET1) {
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data = xgene_enet_rd_mcx_csr(p, XG_MCX_MULTI_DPF1_ADDR);
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data = (NORM_PAUSE_OPCODE << 16) | (data & 0xFFFF);
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xgene_enet_wr_mcx_csr(p, XG_MCX_MULTI_DPF1_ADDR, data);
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}
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pause_thres_reg = (p->enet_id == XGENE_ENET1) ? RXBUF_PAUSE_THRESH :
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XG_RXBUF_PAUSE_THRESH;
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pause_off_thres_reg = (p->enet_id == XGENE_ENET1) ?
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RXBUF_PAUSE_OFF_THRESH : 0;
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if (p->enet_id == XGENE_ENET1) {
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data1 = xgene_enet_rd_csr(p, pause_thres_reg);
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data2 = xgene_enet_rd_csr(p, pause_off_thres_reg);
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if (!(p->port_id % 2)) {
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data1 = (data1 & 0xffff0000) | DEF_PAUSE_THRES;
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data2 = (data2 & 0xffff0000) | DEF_PAUSE_OFF_THRES;
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} else {
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data1 = (data1 & 0xffff) | (DEF_PAUSE_THRES << 16);
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data2 = (data2 & 0xffff) | (DEF_PAUSE_OFF_THRES << 16);
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}
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xgene_enet_wr_csr(p, pause_thres_reg, data1);
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xgene_enet_wr_csr(p, pause_off_thres_reg, data2);
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} else {
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data = (DEF_PAUSE_OFF_THRES << 16) | DEF_PAUSE_THRES;
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xgene_enet_wr_csr(p, pause_thres_reg, data);
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}
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xgene_sgmac_flowctl_tx(p, p->tx_pause);
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xgene_sgmac_flowctl_rx(p, p->rx_pause);
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/* Bypass traffic gating */
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xgene_enet_wr_csr(p, XG_ENET_SPARE_CFG_REG_1_ADDR, 0x84);
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xgene_enet_wr_csr(p, cfg_bypass_reg, RESUME_TX);
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xgene_enet_wr_mcx_csr(p, rx_dv_gate_reg, RESUME_RX0);
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}
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static void xgene_sgmac_rx_enable(struct xgene_enet_pdata *p)
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{
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xgene_sgmac_rxtx(p, RX_EN, true);
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}
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static void xgene_sgmac_tx_enable(struct xgene_enet_pdata *p)
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{
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xgene_sgmac_rxtx(p, TX_EN, true);
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}
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static void xgene_sgmac_rx_disable(struct xgene_enet_pdata *p)
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{
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xgene_sgmac_rxtx(p, RX_EN, false);
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}
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static void xgene_sgmac_tx_disable(struct xgene_enet_pdata *p)
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{
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xgene_sgmac_rxtx(p, TX_EN, false);
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}
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static int xgene_enet_reset(struct xgene_enet_pdata *p)
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{
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struct device *dev = &p->pdev->dev;
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if (!xgene_ring_mgr_init(p))
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return -ENODEV;
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if (p->mdio_driver && p->enet_id == XGENE_ENET2) {
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xgene_enet_config_ring_if_assoc(p);
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return 0;
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}
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if (p->enet_id == XGENE_ENET2)
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xgene_enet_wr_clkrst_csr(p, XGENET_CONFIG_REG_ADDR, SGMII_EN);
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if (dev->of_node) {
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if (!IS_ERR(p->clk)) {
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clk_prepare_enable(p->clk);
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udelay(5);
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clk_disable_unprepare(p->clk);
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udelay(5);
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clk_prepare_enable(p->clk);
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udelay(5);
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}
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} else {
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#ifdef CONFIG_ACPI
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acpi_status status;
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status = acpi_evaluate_object(ACPI_HANDLE(&p->pdev->dev),
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"_RST", NULL, NULL);
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if (ACPI_FAILURE(status)) {
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acpi_evaluate_object(ACPI_HANDLE(&p->pdev->dev),
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"_INI", NULL, NULL);
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}
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#endif
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}
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if (!p->port_id) {
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xgene_enet_ecc_init(p);
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xgene_enet_config_ring_if_assoc(p);
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}
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return 0;
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}
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static void xgene_enet_cle_bypass(struct xgene_enet_pdata *p,
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u32 dst_ring_num, u16 bufpool_id,
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u16 nxtbufpool_id)
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{
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u32 cle_bypass_reg0, cle_bypass_reg1;
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u32 offset = p->port_id * MAC_OFFSET;
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u32 data, fpsel, nxtfpsel;
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if (p->enet_id == XGENE_ENET1) {
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cle_bypass_reg0 = CLE_BYPASS_REG0_0_ADDR;
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cle_bypass_reg1 = CLE_BYPASS_REG1_0_ADDR;
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} else {
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cle_bypass_reg0 = XCLE_BYPASS_REG0_ADDR;
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cle_bypass_reg1 = XCLE_BYPASS_REG1_ADDR;
|
}
|
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data = CFG_CLE_BYPASS_EN0;
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xgene_enet_wr_csr(p, cle_bypass_reg0 + offset, data);
|
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fpsel = xgene_enet_get_fpsel(bufpool_id);
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nxtfpsel = xgene_enet_get_fpsel(nxtbufpool_id);
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data = CFG_CLE_DSTQID0(dst_ring_num) | CFG_CLE_FPSEL0(fpsel) |
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CFG_CLE_NXTFPSEL0(nxtfpsel);
|
xgene_enet_wr_csr(p, cle_bypass_reg1 + offset, data);
|
}
|
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static void xgene_enet_clear(struct xgene_enet_pdata *pdata,
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struct xgene_enet_desc_ring *ring)
|
{
|
u32 addr, data;
|
|
if (xgene_enet_is_bufpool(ring->id)) {
|
addr = ENET_CFGSSQMIFPRESET_ADDR;
|
data = BIT(xgene_enet_get_fpsel(ring->id));
|
} else {
|
addr = ENET_CFGSSQMIWQRESET_ADDR;
|
data = BIT(xgene_enet_ring_bufnum(ring->id));
|
}
|
|
xgene_enet_wr_ring_if(pdata, addr, data);
|
}
|
|
static void xgene_enet_shutdown(struct xgene_enet_pdata *p)
|
{
|
struct device *dev = &p->pdev->dev;
|
|
if (dev->of_node) {
|
if (!IS_ERR(p->clk))
|
clk_disable_unprepare(p->clk);
|
}
|
}
|
|
static void xgene_enet_link_state(struct work_struct *work)
|
{
|
struct xgene_enet_pdata *p = container_of(to_delayed_work(work),
|
struct xgene_enet_pdata, link_work);
|
struct net_device *ndev = p->ndev;
|
u32 link, poll_interval;
|
|
link = xgene_enet_link_status(p);
|
if (link) {
|
if (!netif_carrier_ok(ndev)) {
|
netif_carrier_on(ndev);
|
xgene_sgmac_set_speed(p);
|
xgene_sgmac_rx_enable(p);
|
xgene_sgmac_tx_enable(p);
|
netdev_info(ndev, "Link is Up - %dMbps\n",
|
p->phy_speed);
|
}
|
poll_interval = PHY_POLL_LINK_ON;
|
} else {
|
if (netif_carrier_ok(ndev)) {
|
xgene_sgmac_rx_disable(p);
|
xgene_sgmac_tx_disable(p);
|
netif_carrier_off(ndev);
|
netdev_info(ndev, "Link is Down\n");
|
}
|
poll_interval = PHY_POLL_LINK_OFF;
|
}
|
|
schedule_delayed_work(&p->link_work, poll_interval);
|
}
|
|
static void xgene_sgmac_enable_tx_pause(struct xgene_enet_pdata *p, bool enable)
|
{
|
u32 data, ecm_cfg_addr;
|
|
if (p->enet_id == XGENE_ENET1) {
|
ecm_cfg_addr = (!(p->port_id % 2)) ? CSR_ECM_CFG_0_ADDR :
|
CSR_ECM_CFG_1_ADDR;
|
} else {
|
ecm_cfg_addr = XG_MCX_ECM_CFG_0_ADDR;
|
}
|
|
data = xgene_enet_rd_mcx_csr(p, ecm_cfg_addr);
|
if (enable)
|
data |= MULTI_DPF_AUTOCTRL | PAUSE_XON_EN;
|
else
|
data &= ~(MULTI_DPF_AUTOCTRL | PAUSE_XON_EN);
|
xgene_enet_wr_mcx_csr(p, ecm_cfg_addr, data);
|
}
|
|
const struct xgene_mac_ops xgene_sgmac_ops = {
|
.init = xgene_sgmac_init,
|
.reset = xgene_sgmac_reset,
|
.rx_enable = xgene_sgmac_rx_enable,
|
.tx_enable = xgene_sgmac_tx_enable,
|
.rx_disable = xgene_sgmac_rx_disable,
|
.tx_disable = xgene_sgmac_tx_disable,
|
.get_drop_cnt = xgene_sgmac_get_drop_cnt,
|
.set_speed = xgene_sgmac_set_speed,
|
.set_mac_addr = xgene_sgmac_set_mac_addr,
|
.set_framesize = xgene_sgmac_set_frame_size,
|
.link_state = xgene_enet_link_state,
|
.enable_tx_pause = xgene_sgmac_enable_tx_pause,
|
.flowctl_tx = xgene_sgmac_flowctl_tx,
|
.flowctl_rx = xgene_sgmac_flowctl_rx
|
};
|
|
const struct xgene_port_ops xgene_sgport_ops = {
|
.reset = xgene_enet_reset,
|
.clear = xgene_enet_clear,
|
.cle_bypass = xgene_enet_cle_bypass,
|
.shutdown = xgene_enet_shutdown
|
};
|
