linux/drivers/net/ethernet/apm/xgene/xgene_enet_sgmac.c
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   1// SPDX-License-Identifier: GPL-2.0-or-later
   2/* Applied Micro X-Gene SoC Ethernet Driver
   3 *
   4 * Copyright (c) 2014, Applied Micro Circuits Corporation
   5 * Authors: Iyappan Subramanian <isubramanian@apm.com>
   6 *          Keyur Chudgar <kchudgar@apm.com>
   7 */
   8
   9#include "xgene_enet_main.h"
  10#include "xgene_enet_hw.h"
  11#include "xgene_enet_sgmac.h"
  12#include "xgene_enet_xgmac.h"
  13
  14static void xgene_enet_wr_csr(struct xgene_enet_pdata *p, u32 offset, u32 val)
  15{
  16        iowrite32(val, p->eth_csr_addr + offset);
  17}
  18
  19static void xgene_enet_wr_clkrst_csr(struct xgene_enet_pdata *p, u32 offset,
  20                                     u32 val)
  21{
  22        iowrite32(val, p->base_addr + offset);
  23}
  24
  25static void xgene_enet_wr_ring_if(struct xgene_enet_pdata *p,
  26                                  u32 offset, u32 val)
  27{
  28        iowrite32(val, p->eth_ring_if_addr + offset);
  29}
  30
  31static void xgene_enet_wr_diag_csr(struct xgene_enet_pdata *p,
  32                                   u32 offset, u32 val)
  33{
  34        iowrite32(val, p->eth_diag_csr_addr + offset);
  35}
  36
  37static void xgene_enet_wr_mcx_csr(struct xgene_enet_pdata *pdata,
  38                                  u32 offset, u32 val)
  39{
  40        void __iomem *addr = pdata->mcx_mac_csr_addr + offset;
  41
  42        iowrite32(val, addr);
  43}
  44
  45static u32 xgene_enet_rd_csr(struct xgene_enet_pdata *p, u32 offset)
  46{
  47        return ioread32(p->eth_csr_addr + offset);
  48}
  49
  50static u32 xgene_enet_rd_diag_csr(struct xgene_enet_pdata *p, u32 offset)
  51{
  52        return ioread32(p->eth_diag_csr_addr + offset);
  53}
  54
  55static u32 xgene_enet_rd_mcx_csr(struct xgene_enet_pdata *p, u32 offset)
  56{
  57        return ioread32(p->mcx_mac_csr_addr + offset);
  58}
  59
  60static int xgene_enet_ecc_init(struct xgene_enet_pdata *p)
  61{
  62        struct net_device *ndev = p->ndev;
  63        u32 data, shutdown;
  64        int i = 0;
  65
  66        shutdown = xgene_enet_rd_diag_csr(p, ENET_CFG_MEM_RAM_SHUTDOWN_ADDR);
  67        data = xgene_enet_rd_diag_csr(p, ENET_BLOCK_MEM_RDY_ADDR);
  68
  69        if (!shutdown && data == ~0U) {
  70                netdev_dbg(ndev, "+ ecc_init done, skipping\n");
  71                return 0;
  72        }
  73
  74        xgene_enet_wr_diag_csr(p, ENET_CFG_MEM_RAM_SHUTDOWN_ADDR, 0);
  75        do {
  76                usleep_range(100, 110);
  77                data = xgene_enet_rd_diag_csr(p, ENET_BLOCK_MEM_RDY_ADDR);
  78                if (data == ~0U)
  79                        return 0;
  80        } while (++i < 10);
  81
  82        netdev_err(ndev, "Failed to release memory from shutdown\n");
  83        return -ENODEV;
  84}
  85
  86static void xgene_sgmac_get_drop_cnt(struct xgene_enet_pdata *pdata,
  87                                     u32 *rx, u32 *tx)
  88{
  89        u32 addr, count;
  90
  91        addr = (pdata->enet_id != XGENE_ENET1) ?
  92                XG_MCX_ICM_ECM_DROP_COUNT_REG0_ADDR :
  93                ICM_ECM_DROP_COUNT_REG0_ADDR + pdata->port_id * OFFSET_4;
  94        count = xgene_enet_rd_mcx_csr(pdata, addr);
  95        *rx = ICM_DROP_COUNT(count);
  96        *tx = ECM_DROP_COUNT(count);
  97        /* Errata: 10GE_4 - ICM_ECM_DROP_COUNT not clear-on-read */
  98        addr = (pdata->enet_id != XGENE_ENET1) ?
  99                XG_MCX_ECM_CONFIG0_REG_0_ADDR :
 100                ECM_CONFIG0_REG_0_ADDR + pdata->port_id * OFFSET_4;
 101        xgene_enet_rd_mcx_csr(pdata, addr);
 102}
 103
 104static void xgene_enet_config_ring_if_assoc(struct xgene_enet_pdata *p)
 105{
 106        u32 val;
 107
 108        val = (p->enet_id == XGENE_ENET1) ? 0xffffffff : 0;
 109        xgene_enet_wr_ring_if(p, ENET_CFGSSQMIWQASSOC_ADDR, val);
 110        xgene_enet_wr_ring_if(p, ENET_CFGSSQMIFPQASSOC_ADDR, val);
 111}
 112
 113static void xgene_mii_phy_write(struct xgene_enet_pdata *p, u8 phy_id,
 114                                u32 reg, u16 data)
 115{
 116        u32 addr, wr_data, done;
 117        int i;
 118
 119        addr = PHY_ADDR(phy_id) | REG_ADDR(reg);
 120        xgene_enet_wr_mac(p, MII_MGMT_ADDRESS_ADDR, addr);
 121
 122        wr_data = PHY_CONTROL(data);
 123        xgene_enet_wr_mac(p, MII_MGMT_CONTROL_ADDR, wr_data);
 124
 125        for (i = 0; i < 10; i++) {
 126                done = xgene_enet_rd_mac(p, MII_MGMT_INDICATORS_ADDR);
 127                if (!(done & BUSY_MASK))
 128                        return;
 129                usleep_range(10, 20);
 130        }
 131
 132        netdev_err(p->ndev, "MII_MGMT write failed\n");
 133}
 134
 135static u32 xgene_mii_phy_read(struct xgene_enet_pdata *p, u8 phy_id, u32 reg)
 136{
 137        u32 addr, data, done;
 138        int i;
 139
 140        addr = PHY_ADDR(phy_id) | REG_ADDR(reg);
 141        xgene_enet_wr_mac(p, MII_MGMT_ADDRESS_ADDR, addr);
 142        xgene_enet_wr_mac(p, MII_MGMT_COMMAND_ADDR, READ_CYCLE_MASK);
 143
 144        for (i = 0; i < 10; i++) {
 145                done = xgene_enet_rd_mac(p, MII_MGMT_INDICATORS_ADDR);
 146                if (!(done & BUSY_MASK)) {
 147                        data = xgene_enet_rd_mac(p, MII_MGMT_STATUS_ADDR);
 148                        xgene_enet_wr_mac(p, MII_MGMT_COMMAND_ADDR, 0);
 149
 150                        return data;
 151                }
 152                usleep_range(10, 20);
 153        }
 154
 155        netdev_err(p->ndev, "MII_MGMT read failed\n");
 156
 157        return 0;
 158}
 159
 160static void xgene_sgmac_reset(struct xgene_enet_pdata *p)
 161{
 162        xgene_enet_wr_mac(p, MAC_CONFIG_1_ADDR, SOFT_RESET1);
 163        xgene_enet_wr_mac(p, MAC_CONFIG_1_ADDR, 0);
 164}
 165
 166static void xgene_sgmac_set_mac_addr(struct xgene_enet_pdata *p)
 167{
 168        u32 addr0, addr1;
 169        u8 *dev_addr = p->ndev->dev_addr;
 170
 171        addr0 = (dev_addr[3] << 24) | (dev_addr[2] << 16) |
 172                (dev_addr[1] << 8) | dev_addr[0];
 173        xgene_enet_wr_mac(p, STATION_ADDR0_ADDR, addr0);
 174
 175        addr1 = xgene_enet_rd_mac(p, STATION_ADDR1_ADDR);
 176        addr1 |= (dev_addr[5] << 24) | (dev_addr[4] << 16);
 177        xgene_enet_wr_mac(p, STATION_ADDR1_ADDR, addr1);
 178}
 179
 180static u32 xgene_enet_link_status(struct xgene_enet_pdata *p)
 181{
 182        u32 data;
 183
 184        data = xgene_mii_phy_read(p, INT_PHY_ADDR,
 185                                  SGMII_BASE_PAGE_ABILITY_ADDR >> 2);
 186
 187        if (LINK_SPEED(data) == PHY_SPEED_1000)
 188                p->phy_speed = SPEED_1000;
 189        else if (LINK_SPEED(data) == PHY_SPEED_100)
 190                p->phy_speed = SPEED_100;
 191        else
 192                p->phy_speed = SPEED_10;
 193
 194        return data & LINK_UP;
 195}
 196
 197static void xgene_sgmii_configure(struct xgene_enet_pdata *p)
 198{
 199        xgene_mii_phy_write(p, INT_PHY_ADDR, SGMII_TBI_CONTROL_ADDR >> 2,
 200                            0x8000);
 201        xgene_mii_phy_write(p, INT_PHY_ADDR, SGMII_CONTROL_ADDR >> 2, 0x9000);
 202        xgene_mii_phy_write(p, INT_PHY_ADDR, SGMII_TBI_CONTROL_ADDR >> 2, 0);
 203}
 204
 205static void xgene_sgmii_tbi_control_reset(struct xgene_enet_pdata *p)
 206{
 207        xgene_mii_phy_write(p, INT_PHY_ADDR, SGMII_TBI_CONTROL_ADDR >> 2,
 208                            0x8000);
 209        xgene_mii_phy_write(p, INT_PHY_ADDR, SGMII_TBI_CONTROL_ADDR >> 2, 0);
 210}
 211
 212static void xgene_sgmii_reset(struct xgene_enet_pdata *p)
 213{
 214        u32 value;
 215
 216        if (p->phy_speed == SPEED_UNKNOWN)
 217                return;
 218
 219        value = xgene_mii_phy_read(p, INT_PHY_ADDR,
 220                                   SGMII_BASE_PAGE_ABILITY_ADDR >> 2);
 221        if (!(value & LINK_UP))
 222                xgene_sgmii_tbi_control_reset(p);
 223}
 224
 225static void xgene_sgmac_set_speed(struct xgene_enet_pdata *p)
 226{
 227        u32 icm0_addr, icm2_addr, debug_addr;
 228        u32 icm0, icm2, intf_ctl;
 229        u32 mc2, value;
 230
 231        xgene_sgmii_reset(p);
 232
 233        if (p->enet_id == XGENE_ENET1) {
 234                icm0_addr = ICM_CONFIG0_REG_0_ADDR + p->port_id * OFFSET_8;
 235                icm2_addr = ICM_CONFIG2_REG_0_ADDR + p->port_id * OFFSET_4;
 236                debug_addr = DEBUG_REG_ADDR;
 237        } else {
 238                icm0_addr = XG_MCX_ICM_CONFIG0_REG_0_ADDR;
 239                icm2_addr = XG_MCX_ICM_CONFIG2_REG_0_ADDR;
 240                debug_addr = XG_DEBUG_REG_ADDR;
 241        }
 242
 243        icm0 = xgene_enet_rd_mcx_csr(p, icm0_addr);
 244        icm2 = xgene_enet_rd_mcx_csr(p, icm2_addr);
 245        mc2 = xgene_enet_rd_mac(p, MAC_CONFIG_2_ADDR);
 246        intf_ctl = xgene_enet_rd_mac(p, INTERFACE_CONTROL_ADDR);
 247
 248        switch (p->phy_speed) {
 249        case SPEED_10:
 250                ENET_INTERFACE_MODE2_SET(&mc2, 1);
 251                intf_ctl &= ~(ENET_LHD_MODE | ENET_GHD_MODE);
 252                CFG_MACMODE_SET(&icm0, 0);
 253                CFG_WAITASYNCRD_SET(&icm2, 500);
 254                break;
 255        case SPEED_100:
 256                ENET_INTERFACE_MODE2_SET(&mc2, 1);
 257                intf_ctl &= ~ENET_GHD_MODE;
 258                intf_ctl |= ENET_LHD_MODE;
 259                CFG_MACMODE_SET(&icm0, 1);
 260                CFG_WAITASYNCRD_SET(&icm2, 80);
 261                break;
 262        default:
 263                ENET_INTERFACE_MODE2_SET(&mc2, 2);
 264                intf_ctl &= ~ENET_LHD_MODE;
 265                intf_ctl |= ENET_GHD_MODE;
 266                CFG_MACMODE_SET(&icm0, 2);
 267                CFG_WAITASYNCRD_SET(&icm2, 16);
 268                value = xgene_enet_rd_csr(p, debug_addr);
 269                value |= CFG_BYPASS_UNISEC_TX | CFG_BYPASS_UNISEC_RX;
 270                xgene_enet_wr_csr(p, debug_addr, value);
 271                break;
 272        }
 273
 274        mc2 |= FULL_DUPLEX2 | PAD_CRC;
 275        xgene_enet_wr_mac(p, MAC_CONFIG_2_ADDR, mc2);
 276        xgene_enet_wr_mac(p, INTERFACE_CONTROL_ADDR, intf_ctl);
 277        xgene_enet_wr_mcx_csr(p, icm0_addr, icm0);
 278        xgene_enet_wr_mcx_csr(p, icm2_addr, icm2);
 279}
 280
 281static void xgene_sgmac_set_frame_size(struct xgene_enet_pdata *pdata, int size)
 282{
 283        xgene_enet_wr_mac(pdata, MAX_FRAME_LEN_ADDR, size);
 284}
 285
 286static void xgene_sgmii_enable_autoneg(struct xgene_enet_pdata *p)
 287{
 288        u32 data, loop = 10;
 289
 290        xgene_sgmii_configure(p);
 291
 292        while (loop--) {
 293                data = xgene_mii_phy_read(p, INT_PHY_ADDR,
 294                                          SGMII_STATUS_ADDR >> 2);
 295                if ((data & AUTO_NEG_COMPLETE) && (data & LINK_STATUS))
 296                        break;
 297                usleep_range(1000, 2000);
 298        }
 299        if (!(data & AUTO_NEG_COMPLETE) || !(data & LINK_STATUS))
 300                netdev_err(p->ndev, "Auto-negotiation failed\n");
 301}
 302
 303static void xgene_sgmac_rxtx(struct xgene_enet_pdata *p, u32 bits, bool set)
 304{
 305        u32 data;
 306
 307        data = xgene_enet_rd_mac(p, MAC_CONFIG_1_ADDR);
 308
 309        if (set)
 310                data |= bits;
 311        else
 312                data &= ~bits;
 313
 314        xgene_enet_wr_mac(p, MAC_CONFIG_1_ADDR, data);
 315}
 316
 317static void xgene_sgmac_flowctl_tx(struct xgene_enet_pdata *p, bool enable)
 318{
 319        xgene_sgmac_rxtx(p, TX_FLOW_EN, enable);
 320
 321        p->mac_ops->enable_tx_pause(p, enable);
 322}
 323
 324static void xgene_sgmac_flowctl_rx(struct xgene_enet_pdata *pdata, bool enable)
 325{
 326        xgene_sgmac_rxtx(pdata, RX_FLOW_EN, enable);
 327}
 328
 329static void xgene_sgmac_init(struct xgene_enet_pdata *p)
 330{
 331        u32 pause_thres_reg, pause_off_thres_reg;
 332        u32 enet_spare_cfg_reg, rsif_config_reg;
 333        u32 cfg_bypass_reg, rx_dv_gate_reg;
 334        u32 data, data1, data2, offset;
 335        u32 multi_dpf_reg;
 336
 337        if (!(p->enet_id == XGENE_ENET2 && p->mdio_driver))
 338                xgene_sgmac_reset(p);
 339
 340        xgene_sgmii_enable_autoneg(p);
 341        xgene_sgmac_set_speed(p);
 342        xgene_sgmac_set_mac_addr(p);
 343
 344        if (p->enet_id == XGENE_ENET1) {
 345                enet_spare_cfg_reg = ENET_SPARE_CFG_REG_ADDR;
 346                rsif_config_reg = RSIF_CONFIG_REG_ADDR;
 347                cfg_bypass_reg = CFG_BYPASS_ADDR;
 348                offset = p->port_id * OFFSET_4;
 349                rx_dv_gate_reg = SG_RX_DV_GATE_REG_0_ADDR + offset;
 350        } else {
 351                enet_spare_cfg_reg = XG_ENET_SPARE_CFG_REG_ADDR;
 352                rsif_config_reg = XG_RSIF_CONFIG_REG_ADDR;
 353                cfg_bypass_reg = XG_CFG_BYPASS_ADDR;
 354                rx_dv_gate_reg = XG_MCX_RX_DV_GATE_REG_0_ADDR;
 355        }
 356
 357        data = xgene_enet_rd_csr(p, enet_spare_cfg_reg);
 358        data |= MPA_IDLE_WITH_QMI_EMPTY;
 359        xgene_enet_wr_csr(p, enet_spare_cfg_reg, data);
 360
 361        /* Adjust MDC clock frequency */
 362        data = xgene_enet_rd_mac(p, MII_MGMT_CONFIG_ADDR);
 363        MGMT_CLOCK_SEL_SET(&data, 7);
 364        xgene_enet_wr_mac(p, MII_MGMT_CONFIG_ADDR, data);
 365
 366        /* Enable drop if bufpool not available */
 367        data = xgene_enet_rd_csr(p, rsif_config_reg);
 368        data |= CFG_RSIF_FPBUFF_TIMEOUT_EN;
 369        xgene_enet_wr_csr(p, rsif_config_reg, data);
 370
 371        /* Configure HW pause frame generation */
 372        multi_dpf_reg = (p->enet_id == XGENE_ENET1) ? CSR_MULTI_DPF0_ADDR :
 373                         XG_MCX_MULTI_DPF0_ADDR;
 374        data = xgene_enet_rd_mcx_csr(p, multi_dpf_reg);
 375        data = (DEF_QUANTA << 16) | (data & 0xffff);
 376        xgene_enet_wr_mcx_csr(p, multi_dpf_reg, data);
 377
 378        if (p->enet_id != XGENE_ENET1) {
 379                data = xgene_enet_rd_mcx_csr(p, XG_MCX_MULTI_DPF1_ADDR);
 380                data =  (NORM_PAUSE_OPCODE << 16) | (data & 0xFFFF);
 381                xgene_enet_wr_mcx_csr(p, XG_MCX_MULTI_DPF1_ADDR, data);
 382        }
 383
 384        pause_thres_reg = (p->enet_id == XGENE_ENET1) ? RXBUF_PAUSE_THRESH :
 385                           XG_RXBUF_PAUSE_THRESH;
 386        pause_off_thres_reg = (p->enet_id == XGENE_ENET1) ?
 387                               RXBUF_PAUSE_OFF_THRESH : 0;
 388
 389        if (p->enet_id == XGENE_ENET1) {
 390                data1 = xgene_enet_rd_csr(p, pause_thres_reg);
 391                data2 = xgene_enet_rd_csr(p, pause_off_thres_reg);
 392
 393                if (!(p->port_id % 2)) {
 394                        data1 = (data1 & 0xffff0000) | DEF_PAUSE_THRES;
 395                        data2 = (data2 & 0xffff0000) | DEF_PAUSE_OFF_THRES;
 396                } else {
 397                        data1 = (data1 & 0xffff) | (DEF_PAUSE_THRES << 16);
 398                        data2 = (data2 & 0xffff) | (DEF_PAUSE_OFF_THRES << 16);
 399                }
 400
 401                xgene_enet_wr_csr(p, pause_thres_reg, data1);
 402                xgene_enet_wr_csr(p, pause_off_thres_reg, data2);
 403        } else {
 404                data = (DEF_PAUSE_OFF_THRES << 16) | DEF_PAUSE_THRES;
 405                xgene_enet_wr_csr(p, pause_thres_reg, data);
 406        }
 407
 408        xgene_sgmac_flowctl_tx(p, p->tx_pause);
 409        xgene_sgmac_flowctl_rx(p, p->rx_pause);
 410
 411        /* Bypass traffic gating */
 412        xgene_enet_wr_csr(p, XG_ENET_SPARE_CFG_REG_1_ADDR, 0x84);
 413        xgene_enet_wr_csr(p, cfg_bypass_reg, RESUME_TX);
 414        xgene_enet_wr_mcx_csr(p, rx_dv_gate_reg, RESUME_RX0);
 415}
 416
 417static void xgene_sgmac_rx_enable(struct xgene_enet_pdata *p)
 418{
 419        xgene_sgmac_rxtx(p, RX_EN, true);
 420}
 421
 422static void xgene_sgmac_tx_enable(struct xgene_enet_pdata *p)
 423{
 424        xgene_sgmac_rxtx(p, TX_EN, true);
 425}
 426
 427static void xgene_sgmac_rx_disable(struct xgene_enet_pdata *p)
 428{
 429        xgene_sgmac_rxtx(p, RX_EN, false);
 430}
 431
 432static void xgene_sgmac_tx_disable(struct xgene_enet_pdata *p)
 433{
 434        xgene_sgmac_rxtx(p, TX_EN, false);
 435}
 436
 437static int xgene_enet_reset(struct xgene_enet_pdata *p)
 438{
 439        struct device *dev = &p->pdev->dev;
 440
 441        if (!xgene_ring_mgr_init(p))
 442                return -ENODEV;
 443
 444        if (p->mdio_driver && p->enet_id == XGENE_ENET2) {
 445                xgene_enet_config_ring_if_assoc(p);
 446                return 0;
 447        }
 448
 449        if (p->enet_id == XGENE_ENET2)
 450                xgene_enet_wr_clkrst_csr(p, XGENET_CONFIG_REG_ADDR, SGMII_EN);
 451
 452        if (dev->of_node) {
 453                if (!IS_ERR(p->clk)) {
 454                        clk_prepare_enable(p->clk);
 455                        udelay(5);
 456                        clk_disable_unprepare(p->clk);
 457                        udelay(5);
 458                        clk_prepare_enable(p->clk);
 459                        udelay(5);
 460                }
 461        } else {
 462#ifdef CONFIG_ACPI
 463                acpi_status status;
 464
 465                status = acpi_evaluate_object(ACPI_HANDLE(&p->pdev->dev),
 466                                              "_RST", NULL, NULL);
 467                if (ACPI_FAILURE(status)) {
 468                        acpi_evaluate_object(ACPI_HANDLE(&p->pdev->dev),
 469                                             "_INI", NULL, NULL);
 470                }
 471#endif
 472        }
 473
 474        if (!p->port_id) {
 475                xgene_enet_ecc_init(p);
 476                xgene_enet_config_ring_if_assoc(p);
 477        }
 478
 479        return 0;
 480}
 481
 482static void xgene_enet_cle_bypass(struct xgene_enet_pdata *p,
 483                                  u32 dst_ring_num, u16 bufpool_id,
 484                                  u16 nxtbufpool_id)
 485{
 486        u32 cle_bypass_reg0, cle_bypass_reg1;
 487        u32 offset = p->port_id * MAC_OFFSET;
 488        u32 data, fpsel, nxtfpsel;
 489
 490        if (p->enet_id == XGENE_ENET1) {
 491                cle_bypass_reg0 = CLE_BYPASS_REG0_0_ADDR;
 492                cle_bypass_reg1 = CLE_BYPASS_REG1_0_ADDR;
 493        } else {
 494                cle_bypass_reg0 = XCLE_BYPASS_REG0_ADDR;
 495                cle_bypass_reg1 = XCLE_BYPASS_REG1_ADDR;
 496        }
 497
 498        data = CFG_CLE_BYPASS_EN0;
 499        xgene_enet_wr_csr(p, cle_bypass_reg0 + offset, data);
 500
 501        fpsel = xgene_enet_get_fpsel(bufpool_id);
 502        nxtfpsel = xgene_enet_get_fpsel(nxtbufpool_id);
 503        data = CFG_CLE_DSTQID0(dst_ring_num) | CFG_CLE_FPSEL0(fpsel) |
 504               CFG_CLE_NXTFPSEL0(nxtfpsel);
 505        xgene_enet_wr_csr(p, cle_bypass_reg1 + offset, data);
 506}
 507
 508static void xgene_enet_clear(struct xgene_enet_pdata *pdata,
 509                             struct xgene_enet_desc_ring *ring)
 510{
 511        u32 addr, data;
 512
 513        if (xgene_enet_is_bufpool(ring->id)) {
 514                addr = ENET_CFGSSQMIFPRESET_ADDR;
 515                data = BIT(xgene_enet_get_fpsel(ring->id));
 516        } else {
 517                addr = ENET_CFGSSQMIWQRESET_ADDR;
 518                data = BIT(xgene_enet_ring_bufnum(ring->id));
 519        }
 520
 521        xgene_enet_wr_ring_if(pdata, addr, data);
 522}
 523
 524static void xgene_enet_shutdown(struct xgene_enet_pdata *p)
 525{
 526        struct device *dev = &p->pdev->dev;
 527
 528        if (dev->of_node) {
 529                if (!IS_ERR(p->clk))
 530                        clk_disable_unprepare(p->clk);
 531        }
 532}
 533
 534static void xgene_enet_link_state(struct work_struct *work)
 535{
 536        struct xgene_enet_pdata *p = container_of(to_delayed_work(work),
 537                                     struct xgene_enet_pdata, link_work);
 538        struct net_device *ndev = p->ndev;
 539        u32 link, poll_interval;
 540
 541        link = xgene_enet_link_status(p);
 542        if (link) {
 543                if (!netif_carrier_ok(ndev)) {
 544                        netif_carrier_on(ndev);
 545                        xgene_sgmac_set_speed(p);
 546                        xgene_sgmac_rx_enable(p);
 547                        xgene_sgmac_tx_enable(p);
 548                        netdev_info(ndev, "Link is Up - %dMbps\n",
 549                                    p->phy_speed);
 550                }
 551                poll_interval = PHY_POLL_LINK_ON;
 552        } else {
 553                if (netif_carrier_ok(ndev)) {
 554                        xgene_sgmac_rx_disable(p);
 555                        xgene_sgmac_tx_disable(p);
 556                        netif_carrier_off(ndev);
 557                        netdev_info(ndev, "Link is Down\n");
 558                }
 559                poll_interval = PHY_POLL_LINK_OFF;
 560        }
 561
 562        schedule_delayed_work(&p->link_work, poll_interval);
 563}
 564
 565static void xgene_sgmac_enable_tx_pause(struct xgene_enet_pdata *p, bool enable)
 566{
 567        u32 data, ecm_cfg_addr;
 568
 569        if (p->enet_id == XGENE_ENET1) {
 570                ecm_cfg_addr = (!(p->port_id % 2)) ? CSR_ECM_CFG_0_ADDR :
 571                                CSR_ECM_CFG_1_ADDR;
 572        } else {
 573                ecm_cfg_addr = XG_MCX_ECM_CFG_0_ADDR;
 574        }
 575
 576        data = xgene_enet_rd_mcx_csr(p, ecm_cfg_addr);
 577        if (enable)
 578                data |= MULTI_DPF_AUTOCTRL | PAUSE_XON_EN;
 579        else
 580                data &= ~(MULTI_DPF_AUTOCTRL | PAUSE_XON_EN);
 581        xgene_enet_wr_mcx_csr(p, ecm_cfg_addr, data);
 582}
 583
 584const struct xgene_mac_ops xgene_sgmac_ops = {
 585        .init           = xgene_sgmac_init,
 586        .reset          = xgene_sgmac_reset,
 587        .rx_enable      = xgene_sgmac_rx_enable,
 588        .tx_enable      = xgene_sgmac_tx_enable,
 589        .rx_disable     = xgene_sgmac_rx_disable,
 590        .tx_disable     = xgene_sgmac_tx_disable,
 591        .get_drop_cnt   = xgene_sgmac_get_drop_cnt,
 592        .set_speed      = xgene_sgmac_set_speed,
 593        .set_mac_addr   = xgene_sgmac_set_mac_addr,
 594        .set_framesize  = xgene_sgmac_set_frame_size,
 595        .link_state     = xgene_enet_link_state,
 596        .enable_tx_pause = xgene_sgmac_enable_tx_pause,
 597        .flowctl_tx     = xgene_sgmac_flowctl_tx,
 598        .flowctl_rx     = xgene_sgmac_flowctl_rx
 599};
 600
 601const struct xgene_port_ops xgene_sgport_ops = {
 602        .reset          = xgene_enet_reset,
 603        .clear          = xgene_enet_clear,
 604        .cle_bypass     = xgene_enet_cle_bypass,
 605        .shutdown       = xgene_enet_shutdown
 606};
 607