linux/drivers/net/ethernet/hisilicon/hix5hd2_gmac.c
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   1// SPDX-License-Identifier: GPL-2.0-or-later
   2/* Copyright (c) 2014 Linaro Ltd.
   3 * Copyright (c) 2014 Hisilicon Limited.
   4 */
   5
   6#include <linux/module.h>
   7#include <linux/interrupt.h>
   8#include <linux/etherdevice.h>
   9#include <linux/platform_device.h>
  10#include <linux/of_device.h>
  11#include <linux/of_net.h>
  12#include <linux/of_mdio.h>
  13#include <linux/reset.h>
  14#include <linux/clk.h>
  15#include <linux/circ_buf.h>
  16
  17#define STATION_ADDR_LOW                0x0000
  18#define STATION_ADDR_HIGH               0x0004
  19#define MAC_DUPLEX_HALF_CTRL            0x0008
  20#define MAX_FRM_SIZE                    0x003c
  21#define PORT_MODE                       0x0040
  22#define PORT_EN                         0x0044
  23#define BITS_TX_EN                      BIT(2)
  24#define BITS_RX_EN                      BIT(1)
  25#define REC_FILT_CONTROL                0x0064
  26#define BIT_CRC_ERR_PASS                BIT(5)
  27#define BIT_PAUSE_FRM_PASS              BIT(4)
  28#define BIT_VLAN_DROP_EN                BIT(3)
  29#define BIT_BC_DROP_EN                  BIT(2)
  30#define BIT_MC_MATCH_EN                 BIT(1)
  31#define BIT_UC_MATCH_EN                 BIT(0)
  32#define PORT_MC_ADDR_LOW                0x0068
  33#define PORT_MC_ADDR_HIGH               0x006C
  34#define CF_CRC_STRIP                    0x01b0
  35#define MODE_CHANGE_EN                  0x01b4
  36#define BIT_MODE_CHANGE_EN              BIT(0)
  37#define COL_SLOT_TIME                   0x01c0
  38#define RECV_CONTROL                    0x01e0
  39#define BIT_STRIP_PAD_EN                BIT(3)
  40#define BIT_RUNT_PKT_EN                 BIT(4)
  41#define CONTROL_WORD                    0x0214
  42#define MDIO_SINGLE_CMD                 0x03c0
  43#define MDIO_SINGLE_DATA                0x03c4
  44#define MDIO_CTRL                       0x03cc
  45#define MDIO_RDATA_STATUS               0x03d0
  46
  47#define MDIO_START                      BIT(20)
  48#define MDIO_R_VALID                    BIT(0)
  49#define MDIO_READ                       (BIT(17) | MDIO_START)
  50#define MDIO_WRITE                      (BIT(16) | MDIO_START)
  51
  52#define RX_FQ_START_ADDR                0x0500
  53#define RX_FQ_DEPTH                     0x0504
  54#define RX_FQ_WR_ADDR                   0x0508
  55#define RX_FQ_RD_ADDR                   0x050c
  56#define RX_FQ_VLDDESC_CNT               0x0510
  57#define RX_FQ_ALEMPTY_TH                0x0514
  58#define RX_FQ_REG_EN                    0x0518
  59#define BITS_RX_FQ_START_ADDR_EN        BIT(2)
  60#define BITS_RX_FQ_DEPTH_EN             BIT(1)
  61#define BITS_RX_FQ_RD_ADDR_EN           BIT(0)
  62#define RX_FQ_ALFULL_TH                 0x051c
  63#define RX_BQ_START_ADDR                0x0520
  64#define RX_BQ_DEPTH                     0x0524
  65#define RX_BQ_WR_ADDR                   0x0528
  66#define RX_BQ_RD_ADDR                   0x052c
  67#define RX_BQ_FREE_DESC_CNT             0x0530
  68#define RX_BQ_ALEMPTY_TH                0x0534
  69#define RX_BQ_REG_EN                    0x0538
  70#define BITS_RX_BQ_START_ADDR_EN        BIT(2)
  71#define BITS_RX_BQ_DEPTH_EN             BIT(1)
  72#define BITS_RX_BQ_WR_ADDR_EN           BIT(0)
  73#define RX_BQ_ALFULL_TH                 0x053c
  74#define TX_BQ_START_ADDR                0x0580
  75#define TX_BQ_DEPTH                     0x0584
  76#define TX_BQ_WR_ADDR                   0x0588
  77#define TX_BQ_RD_ADDR                   0x058c
  78#define TX_BQ_VLDDESC_CNT               0x0590
  79#define TX_BQ_ALEMPTY_TH                0x0594
  80#define TX_BQ_REG_EN                    0x0598
  81#define BITS_TX_BQ_START_ADDR_EN        BIT(2)
  82#define BITS_TX_BQ_DEPTH_EN             BIT(1)
  83#define BITS_TX_BQ_RD_ADDR_EN           BIT(0)
  84#define TX_BQ_ALFULL_TH                 0x059c
  85#define TX_RQ_START_ADDR                0x05a0
  86#define TX_RQ_DEPTH                     0x05a4
  87#define TX_RQ_WR_ADDR                   0x05a8
  88#define TX_RQ_RD_ADDR                   0x05ac
  89#define TX_RQ_FREE_DESC_CNT             0x05b0
  90#define TX_RQ_ALEMPTY_TH                0x05b4
  91#define TX_RQ_REG_EN                    0x05b8
  92#define BITS_TX_RQ_START_ADDR_EN        BIT(2)
  93#define BITS_TX_RQ_DEPTH_EN             BIT(1)
  94#define BITS_TX_RQ_WR_ADDR_EN           BIT(0)
  95#define TX_RQ_ALFULL_TH                 0x05bc
  96#define RAW_PMU_INT                     0x05c0
  97#define ENA_PMU_INT                     0x05c4
  98#define STATUS_PMU_INT                  0x05c8
  99#define MAC_FIFO_ERR_IN                 BIT(30)
 100#define TX_RQ_IN_TIMEOUT_INT            BIT(29)
 101#define RX_BQ_IN_TIMEOUT_INT            BIT(28)
 102#define TXOUTCFF_FULL_INT               BIT(27)
 103#define TXOUTCFF_EMPTY_INT              BIT(26)
 104#define TXCFF_FULL_INT                  BIT(25)
 105#define TXCFF_EMPTY_INT                 BIT(24)
 106#define RXOUTCFF_FULL_INT               BIT(23)
 107#define RXOUTCFF_EMPTY_INT              BIT(22)
 108#define RXCFF_FULL_INT                  BIT(21)
 109#define RXCFF_EMPTY_INT                 BIT(20)
 110#define TX_RQ_IN_INT                    BIT(19)
 111#define TX_BQ_OUT_INT                   BIT(18)
 112#define RX_BQ_IN_INT                    BIT(17)
 113#define RX_FQ_OUT_INT                   BIT(16)
 114#define TX_RQ_EMPTY_INT                 BIT(15)
 115#define TX_RQ_FULL_INT                  BIT(14)
 116#define TX_RQ_ALEMPTY_INT               BIT(13)
 117#define TX_RQ_ALFULL_INT                BIT(12)
 118#define TX_BQ_EMPTY_INT                 BIT(11)
 119#define TX_BQ_FULL_INT                  BIT(10)
 120#define TX_BQ_ALEMPTY_INT               BIT(9)
 121#define TX_BQ_ALFULL_INT                BIT(8)
 122#define RX_BQ_EMPTY_INT                 BIT(7)
 123#define RX_BQ_FULL_INT                  BIT(6)
 124#define RX_BQ_ALEMPTY_INT               BIT(5)
 125#define RX_BQ_ALFULL_INT                BIT(4)
 126#define RX_FQ_EMPTY_INT                 BIT(3)
 127#define RX_FQ_FULL_INT                  BIT(2)
 128#define RX_FQ_ALEMPTY_INT               BIT(1)
 129#define RX_FQ_ALFULL_INT                BIT(0)
 130
 131#define DEF_INT_MASK                    (RX_BQ_IN_INT | RX_BQ_IN_TIMEOUT_INT | \
 132                                        TX_RQ_IN_INT | TX_RQ_IN_TIMEOUT_INT)
 133
 134#define DESC_WR_RD_ENA                  0x05cc
 135#define IN_QUEUE_TH                     0x05d8
 136#define OUT_QUEUE_TH                    0x05dc
 137#define QUEUE_TX_BQ_SHIFT               16
 138#define RX_BQ_IN_TIMEOUT_TH             0x05e0
 139#define TX_RQ_IN_TIMEOUT_TH             0x05e4
 140#define STOP_CMD                        0x05e8
 141#define BITS_TX_STOP                    BIT(1)
 142#define BITS_RX_STOP                    BIT(0)
 143#define FLUSH_CMD                       0x05eC
 144#define BITS_TX_FLUSH_CMD               BIT(5)
 145#define BITS_RX_FLUSH_CMD               BIT(4)
 146#define BITS_TX_FLUSH_FLAG_DOWN         BIT(3)
 147#define BITS_TX_FLUSH_FLAG_UP           BIT(2)
 148#define BITS_RX_FLUSH_FLAG_DOWN         BIT(1)
 149#define BITS_RX_FLUSH_FLAG_UP           BIT(0)
 150#define RX_CFF_NUM_REG                  0x05f0
 151#define PMU_FSM_REG                     0x05f8
 152#define RX_FIFO_PKT_IN_NUM              0x05fc
 153#define RX_FIFO_PKT_OUT_NUM             0x0600
 154
 155#define RGMII_SPEED_1000                0x2c
 156#define RGMII_SPEED_100                 0x2f
 157#define RGMII_SPEED_10                  0x2d
 158#define MII_SPEED_100                   0x0f
 159#define MII_SPEED_10                    0x0d
 160#define GMAC_SPEED_1000                 0x05
 161#define GMAC_SPEED_100                  0x01
 162#define GMAC_SPEED_10                   0x00
 163#define GMAC_FULL_DUPLEX                BIT(4)
 164
 165#define RX_BQ_INT_THRESHOLD             0x01
 166#define TX_RQ_INT_THRESHOLD             0x01
 167#define RX_BQ_IN_TIMEOUT                0x10000
 168#define TX_RQ_IN_TIMEOUT                0x50000
 169
 170#define MAC_MAX_FRAME_SIZE              1600
 171#define DESC_SIZE                       32
 172#define RX_DESC_NUM                     1024
 173#define TX_DESC_NUM                     1024
 174
 175#define DESC_VLD_FREE                   0
 176#define DESC_VLD_BUSY                   0x80000000
 177#define DESC_FL_MID                     0
 178#define DESC_FL_LAST                    0x20000000
 179#define DESC_FL_FIRST                   0x40000000
 180#define DESC_FL_FULL                    0x60000000
 181#define DESC_DATA_LEN_OFF               16
 182#define DESC_BUFF_LEN_OFF               0
 183#define DESC_DATA_MASK                  0x7ff
 184#define DESC_SG                         BIT(30)
 185#define DESC_FRAGS_NUM_OFF              11
 186
 187/* DMA descriptor ring helpers */
 188#define dma_ring_incr(n, s)             (((n) + 1) & ((s) - 1))
 189#define dma_cnt(n)                      ((n) >> 5)
 190#define dma_byte(n)                     ((n) << 5)
 191
 192#define HW_CAP_TSO                      BIT(0)
 193#define GEMAC_V1                        0
 194#define GEMAC_V2                        (GEMAC_V1 | HW_CAP_TSO)
 195#define HAS_CAP_TSO(hw_cap)             ((hw_cap) & HW_CAP_TSO)
 196
 197#define PHY_RESET_DELAYS_PROPERTY       "hisilicon,phy-reset-delays-us"
 198
 199enum phy_reset_delays {
 200        PRE_DELAY,
 201        PULSE,
 202        POST_DELAY,
 203        DELAYS_NUM,
 204};
 205
 206struct hix5hd2_desc {
 207        __le32 buff_addr;
 208        __le32 cmd;
 209} __aligned(32);
 210
 211struct hix5hd2_desc_sw {
 212        struct hix5hd2_desc *desc;
 213        dma_addr_t      phys_addr;
 214        unsigned int    count;
 215        unsigned int    size;
 216};
 217
 218struct hix5hd2_sg_desc_ring {
 219        struct sg_desc *desc;
 220        dma_addr_t phys_addr;
 221};
 222
 223struct frags_info {
 224        __le32 addr;
 225        __le32 size;
 226};
 227
 228/* hardware supported max skb frags num */
 229#define SG_MAX_SKB_FRAGS        17
 230struct sg_desc {
 231        __le32 total_len;
 232        __le32 resvd0;
 233        __le32 linear_addr;
 234        __le32 linear_len;
 235        /* reserve one more frags for memory alignment */
 236        struct frags_info frags[SG_MAX_SKB_FRAGS + 1];
 237};
 238
 239#define QUEUE_NUMS      4
 240struct hix5hd2_priv {
 241        struct hix5hd2_desc_sw pool[QUEUE_NUMS];
 242#define rx_fq           pool[0]
 243#define rx_bq           pool[1]
 244#define tx_bq           pool[2]
 245#define tx_rq           pool[3]
 246        struct hix5hd2_sg_desc_ring tx_ring;
 247
 248        void __iomem *base;
 249        void __iomem *ctrl_base;
 250
 251        struct sk_buff *tx_skb[TX_DESC_NUM];
 252        struct sk_buff *rx_skb[RX_DESC_NUM];
 253
 254        struct device *dev;
 255        struct net_device *netdev;
 256
 257        struct device_node *phy_node;
 258        phy_interface_t phy_mode;
 259
 260        unsigned long hw_cap;
 261        unsigned int speed;
 262        unsigned int duplex;
 263
 264        struct clk *mac_core_clk;
 265        struct clk *mac_ifc_clk;
 266        struct reset_control *mac_core_rst;
 267        struct reset_control *mac_ifc_rst;
 268        struct reset_control *phy_rst;
 269        u32 phy_reset_delays[DELAYS_NUM];
 270        struct mii_bus *bus;
 271        struct napi_struct napi;
 272        struct work_struct tx_timeout_task;
 273};
 274
 275static inline void hix5hd2_mac_interface_reset(struct hix5hd2_priv *priv)
 276{
 277        if (!priv->mac_ifc_rst)
 278                return;
 279
 280        reset_control_assert(priv->mac_ifc_rst);
 281        reset_control_deassert(priv->mac_ifc_rst);
 282}
 283
 284static void hix5hd2_config_port(struct net_device *dev, u32 speed, u32 duplex)
 285{
 286        struct hix5hd2_priv *priv = netdev_priv(dev);
 287        u32 val;
 288
 289        priv->speed = speed;
 290        priv->duplex = duplex;
 291
 292        switch (priv->phy_mode) {
 293        case PHY_INTERFACE_MODE_RGMII:
 294                if (speed == SPEED_1000)
 295                        val = RGMII_SPEED_1000;
 296                else if (speed == SPEED_100)
 297                        val = RGMII_SPEED_100;
 298                else
 299                        val = RGMII_SPEED_10;
 300                break;
 301        case PHY_INTERFACE_MODE_MII:
 302                if (speed == SPEED_100)
 303                        val = MII_SPEED_100;
 304                else
 305                        val = MII_SPEED_10;
 306                break;
 307        default:
 308                netdev_warn(dev, "not supported mode\n");
 309                val = MII_SPEED_10;
 310                break;
 311        }
 312
 313        if (duplex)
 314                val |= GMAC_FULL_DUPLEX;
 315        writel_relaxed(val, priv->ctrl_base);
 316        hix5hd2_mac_interface_reset(priv);
 317
 318        writel_relaxed(BIT_MODE_CHANGE_EN, priv->base + MODE_CHANGE_EN);
 319        if (speed == SPEED_1000)
 320                val = GMAC_SPEED_1000;
 321        else if (speed == SPEED_100)
 322                val = GMAC_SPEED_100;
 323        else
 324                val = GMAC_SPEED_10;
 325        writel_relaxed(val, priv->base + PORT_MODE);
 326        writel_relaxed(0, priv->base + MODE_CHANGE_EN);
 327        writel_relaxed(duplex, priv->base + MAC_DUPLEX_HALF_CTRL);
 328}
 329
 330static void hix5hd2_set_desc_depth(struct hix5hd2_priv *priv, int rx, int tx)
 331{
 332        writel_relaxed(BITS_RX_FQ_DEPTH_EN, priv->base + RX_FQ_REG_EN);
 333        writel_relaxed(rx << 3, priv->base + RX_FQ_DEPTH);
 334        writel_relaxed(0, priv->base + RX_FQ_REG_EN);
 335
 336        writel_relaxed(BITS_RX_BQ_DEPTH_EN, priv->base + RX_BQ_REG_EN);
 337        writel_relaxed(rx << 3, priv->base + RX_BQ_DEPTH);
 338        writel_relaxed(0, priv->base + RX_BQ_REG_EN);
 339
 340        writel_relaxed(BITS_TX_BQ_DEPTH_EN, priv->base + TX_BQ_REG_EN);
 341        writel_relaxed(tx << 3, priv->base + TX_BQ_DEPTH);
 342        writel_relaxed(0, priv->base + TX_BQ_REG_EN);
 343
 344        writel_relaxed(BITS_TX_RQ_DEPTH_EN, priv->base + TX_RQ_REG_EN);
 345        writel_relaxed(tx << 3, priv->base + TX_RQ_DEPTH);
 346        writel_relaxed(0, priv->base + TX_RQ_REG_EN);
 347}
 348
 349static void hix5hd2_set_rx_fq(struct hix5hd2_priv *priv, dma_addr_t phy_addr)
 350{
 351        writel_relaxed(BITS_RX_FQ_START_ADDR_EN, priv->base + RX_FQ_REG_EN);
 352        writel_relaxed(phy_addr, priv->base + RX_FQ_START_ADDR);
 353        writel_relaxed(0, priv->base + RX_FQ_REG_EN);
 354}
 355
 356static void hix5hd2_set_rx_bq(struct hix5hd2_priv *priv, dma_addr_t phy_addr)
 357{
 358        writel_relaxed(BITS_RX_BQ_START_ADDR_EN, priv->base + RX_BQ_REG_EN);
 359        writel_relaxed(phy_addr, priv->base + RX_BQ_START_ADDR);
 360        writel_relaxed(0, priv->base + RX_BQ_REG_EN);
 361}
 362
 363static void hix5hd2_set_tx_bq(struct hix5hd2_priv *priv, dma_addr_t phy_addr)
 364{
 365        writel_relaxed(BITS_TX_BQ_START_ADDR_EN, priv->base + TX_BQ_REG_EN);
 366        writel_relaxed(phy_addr, priv->base + TX_BQ_START_ADDR);
 367        writel_relaxed(0, priv->base + TX_BQ_REG_EN);
 368}
 369
 370static void hix5hd2_set_tx_rq(struct hix5hd2_priv *priv, dma_addr_t phy_addr)
 371{
 372        writel_relaxed(BITS_TX_RQ_START_ADDR_EN, priv->base + TX_RQ_REG_EN);
 373        writel_relaxed(phy_addr, priv->base + TX_RQ_START_ADDR);
 374        writel_relaxed(0, priv->base + TX_RQ_REG_EN);
 375}
 376
 377static void hix5hd2_set_desc_addr(struct hix5hd2_priv *priv)
 378{
 379        hix5hd2_set_rx_fq(priv, priv->rx_fq.phys_addr);
 380        hix5hd2_set_rx_bq(priv, priv->rx_bq.phys_addr);
 381        hix5hd2_set_tx_rq(priv, priv->tx_rq.phys_addr);
 382        hix5hd2_set_tx_bq(priv, priv->tx_bq.phys_addr);
 383}
 384
 385static void hix5hd2_hw_init(struct hix5hd2_priv *priv)
 386{
 387        u32 val;
 388
 389        /* disable and clear all interrupts */
 390        writel_relaxed(0, priv->base + ENA_PMU_INT);
 391        writel_relaxed(~0, priv->base + RAW_PMU_INT);
 392
 393        writel_relaxed(BIT_CRC_ERR_PASS, priv->base + REC_FILT_CONTROL);
 394        writel_relaxed(MAC_MAX_FRAME_SIZE, priv->base + CONTROL_WORD);
 395        writel_relaxed(0, priv->base + COL_SLOT_TIME);
 396
 397        val = RX_BQ_INT_THRESHOLD | TX_RQ_INT_THRESHOLD << QUEUE_TX_BQ_SHIFT;
 398        writel_relaxed(val, priv->base + IN_QUEUE_TH);
 399
 400        writel_relaxed(RX_BQ_IN_TIMEOUT, priv->base + RX_BQ_IN_TIMEOUT_TH);
 401        writel_relaxed(TX_RQ_IN_TIMEOUT, priv->base + TX_RQ_IN_TIMEOUT_TH);
 402
 403        hix5hd2_set_desc_depth(priv, RX_DESC_NUM, TX_DESC_NUM);
 404        hix5hd2_set_desc_addr(priv);
 405}
 406
 407static void hix5hd2_irq_enable(struct hix5hd2_priv *priv)
 408{
 409        writel_relaxed(DEF_INT_MASK, priv->base + ENA_PMU_INT);
 410}
 411
 412static void hix5hd2_irq_disable(struct hix5hd2_priv *priv)
 413{
 414        writel_relaxed(0, priv->base + ENA_PMU_INT);
 415}
 416
 417static void hix5hd2_port_enable(struct hix5hd2_priv *priv)
 418{
 419        writel_relaxed(0xf, priv->base + DESC_WR_RD_ENA);
 420        writel_relaxed(BITS_RX_EN | BITS_TX_EN, priv->base + PORT_EN);
 421}
 422
 423static void hix5hd2_port_disable(struct hix5hd2_priv *priv)
 424{
 425        writel_relaxed(~(u32)(BITS_RX_EN | BITS_TX_EN), priv->base + PORT_EN);
 426        writel_relaxed(0, priv->base + DESC_WR_RD_ENA);
 427}
 428
 429static void hix5hd2_hw_set_mac_addr(struct net_device *dev)
 430{
 431        struct hix5hd2_priv *priv = netdev_priv(dev);
 432        unsigned char *mac = dev->dev_addr;
 433        u32 val;
 434
 435        val = mac[1] | (mac[0] << 8);
 436        writel_relaxed(val, priv->base + STATION_ADDR_HIGH);
 437
 438        val = mac[5] | (mac[4] << 8) | (mac[3] << 16) | (mac[2] << 24);
 439        writel_relaxed(val, priv->base + STATION_ADDR_LOW);
 440}
 441
 442static int hix5hd2_net_set_mac_address(struct net_device *dev, void *p)
 443{
 444        int ret;
 445
 446        ret = eth_mac_addr(dev, p);
 447        if (!ret)
 448                hix5hd2_hw_set_mac_addr(dev);
 449
 450        return ret;
 451}
 452
 453static void hix5hd2_adjust_link(struct net_device *dev)
 454{
 455        struct hix5hd2_priv *priv = netdev_priv(dev);
 456        struct phy_device *phy = dev->phydev;
 457
 458        if ((priv->speed != phy->speed) || (priv->duplex != phy->duplex)) {
 459                hix5hd2_config_port(dev, phy->speed, phy->duplex);
 460                phy_print_status(phy);
 461        }
 462}
 463
 464static void hix5hd2_rx_refill(struct hix5hd2_priv *priv)
 465{
 466        struct hix5hd2_desc *desc;
 467        struct sk_buff *skb;
 468        u32 start, end, num, pos, i;
 469        u32 len = MAC_MAX_FRAME_SIZE;
 470        dma_addr_t addr;
 471
 472        /* software write pointer */
 473        start = dma_cnt(readl_relaxed(priv->base + RX_FQ_WR_ADDR));
 474        /* logic read pointer */
 475        end = dma_cnt(readl_relaxed(priv->base + RX_FQ_RD_ADDR));
 476        num = CIRC_SPACE(start, end, RX_DESC_NUM);
 477
 478        for (i = 0, pos = start; i < num; i++) {
 479                if (priv->rx_skb[pos]) {
 480                        break;
 481                } else {
 482                        skb = netdev_alloc_skb_ip_align(priv->netdev, len);
 483                        if (unlikely(skb == NULL))
 484                                break;
 485                }
 486
 487                addr = dma_map_single(priv->dev, skb->data, len, DMA_FROM_DEVICE);
 488                if (dma_mapping_error(priv->dev, addr)) {
 489                        dev_kfree_skb_any(skb);
 490                        break;
 491                }
 492
 493                desc = priv->rx_fq.desc + pos;
 494                desc->buff_addr = cpu_to_le32(addr);
 495                priv->rx_skb[pos] = skb;
 496                desc->cmd = cpu_to_le32(DESC_VLD_FREE |
 497                                        (len - 1) << DESC_BUFF_LEN_OFF);
 498                pos = dma_ring_incr(pos, RX_DESC_NUM);
 499        }
 500
 501        /* ensure desc updated */
 502        wmb();
 503
 504        if (pos != start)
 505                writel_relaxed(dma_byte(pos), priv->base + RX_FQ_WR_ADDR);
 506}
 507
 508static int hix5hd2_rx(struct net_device *dev, int limit)
 509{
 510        struct hix5hd2_priv *priv = netdev_priv(dev);
 511        struct sk_buff *skb;
 512        struct hix5hd2_desc *desc;
 513        dma_addr_t addr;
 514        u32 start, end, num, pos, i, len;
 515
 516        /* software read pointer */
 517        start = dma_cnt(readl_relaxed(priv->base + RX_BQ_RD_ADDR));
 518        /* logic write pointer */
 519        end = dma_cnt(readl_relaxed(priv->base + RX_BQ_WR_ADDR));
 520        num = CIRC_CNT(end, start, RX_DESC_NUM);
 521        if (num > limit)
 522                num = limit;
 523
 524        /* ensure get updated desc */
 525        rmb();
 526        for (i = 0, pos = start; i < num; i++) {
 527                skb = priv->rx_skb[pos];
 528                if (unlikely(!skb)) {
 529                        netdev_err(dev, "inconsistent rx_skb\n");
 530                        break;
 531                }
 532                priv->rx_skb[pos] = NULL;
 533
 534                desc = priv->rx_bq.desc + pos;
 535                len = (le32_to_cpu(desc->cmd) >> DESC_DATA_LEN_OFF) &
 536                       DESC_DATA_MASK;
 537                addr = le32_to_cpu(desc->buff_addr);
 538                dma_unmap_single(priv->dev, addr, MAC_MAX_FRAME_SIZE,
 539                                 DMA_FROM_DEVICE);
 540
 541                skb_put(skb, len);
 542                if (skb->len > MAC_MAX_FRAME_SIZE) {
 543                        netdev_err(dev, "rcv len err, len = %d\n", skb->len);
 544                        dev->stats.rx_errors++;
 545                        dev->stats.rx_length_errors++;
 546                        dev_kfree_skb_any(skb);
 547                        goto next;
 548                }
 549
 550                skb->protocol = eth_type_trans(skb, dev);
 551                napi_gro_receive(&priv->napi, skb);
 552                dev->stats.rx_packets++;
 553                dev->stats.rx_bytes += skb->len;
 554next:
 555                pos = dma_ring_incr(pos, RX_DESC_NUM);
 556        }
 557
 558        if (pos != start)
 559                writel_relaxed(dma_byte(pos), priv->base + RX_BQ_RD_ADDR);
 560
 561        hix5hd2_rx_refill(priv);
 562
 563        return num;
 564}
 565
 566static void hix5hd2_clean_sg_desc(struct hix5hd2_priv *priv,
 567                                  struct sk_buff *skb, u32 pos)
 568{
 569        struct sg_desc *desc;
 570        dma_addr_t addr;
 571        u32 len;
 572        int i;
 573
 574        desc = priv->tx_ring.desc + pos;
 575
 576        addr = le32_to_cpu(desc->linear_addr);
 577        len = le32_to_cpu(desc->linear_len);
 578        dma_unmap_single(priv->dev, addr, len, DMA_TO_DEVICE);
 579
 580        for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
 581                addr = le32_to_cpu(desc->frags[i].addr);
 582                len = le32_to_cpu(desc->frags[i].size);
 583                dma_unmap_page(priv->dev, addr, len, DMA_TO_DEVICE);
 584        }
 585}
 586
 587static void hix5hd2_xmit_reclaim(struct net_device *dev)
 588{
 589        struct sk_buff *skb;
 590        struct hix5hd2_desc *desc;
 591        struct hix5hd2_priv *priv = netdev_priv(dev);
 592        unsigned int bytes_compl = 0, pkts_compl = 0;
 593        u32 start, end, num, pos, i;
 594        dma_addr_t addr;
 595
 596        netif_tx_lock(dev);
 597
 598        /* software read */
 599        start = dma_cnt(readl_relaxed(priv->base + TX_RQ_RD_ADDR));
 600        /* logic write */
 601        end = dma_cnt(readl_relaxed(priv->base + TX_RQ_WR_ADDR));
 602        num = CIRC_CNT(end, start, TX_DESC_NUM);
 603
 604        for (i = 0, pos = start; i < num; i++) {
 605                skb = priv->tx_skb[pos];
 606                if (unlikely(!skb)) {
 607                        netdev_err(dev, "inconsistent tx_skb\n");
 608                        break;
 609                }
 610
 611                pkts_compl++;
 612                bytes_compl += skb->len;
 613                desc = priv->tx_rq.desc + pos;
 614
 615                if (skb_shinfo(skb)->nr_frags) {
 616                        hix5hd2_clean_sg_desc(priv, skb, pos);
 617                } else {
 618                        addr = le32_to_cpu(desc->buff_addr);
 619                        dma_unmap_single(priv->dev, addr, skb->len,
 620                                         DMA_TO_DEVICE);
 621                }
 622
 623                priv->tx_skb[pos] = NULL;
 624                dev_consume_skb_any(skb);
 625                pos = dma_ring_incr(pos, TX_DESC_NUM);
 626        }
 627
 628        if (pos != start)
 629                writel_relaxed(dma_byte(pos), priv->base + TX_RQ_RD_ADDR);
 630
 631        netif_tx_unlock(dev);
 632
 633        if (pkts_compl || bytes_compl)
 634                netdev_completed_queue(dev, pkts_compl, bytes_compl);
 635
 636        if (unlikely(netif_queue_stopped(priv->netdev)) && pkts_compl)
 637                netif_wake_queue(priv->netdev);
 638}
 639
 640static int hix5hd2_poll(struct napi_struct *napi, int budget)
 641{
 642        struct hix5hd2_priv *priv = container_of(napi,
 643                                struct hix5hd2_priv, napi);
 644        struct net_device *dev = priv->netdev;
 645        int work_done = 0, task = budget;
 646        int ints, num;
 647
 648        do {
 649                hix5hd2_xmit_reclaim(dev);
 650                num = hix5hd2_rx(dev, task);
 651                work_done += num;
 652                task -= num;
 653                if ((work_done >= budget) || (num == 0))
 654                        break;
 655
 656                ints = readl_relaxed(priv->base + RAW_PMU_INT);
 657                writel_relaxed(ints, priv->base + RAW_PMU_INT);
 658        } while (ints & DEF_INT_MASK);
 659
 660        if (work_done < budget) {
 661                napi_complete_done(napi, work_done);
 662                hix5hd2_irq_enable(priv);
 663        }
 664
 665        return work_done;
 666}
 667
 668static irqreturn_t hix5hd2_interrupt(int irq, void *dev_id)
 669{
 670        struct net_device *dev = (struct net_device *)dev_id;
 671        struct hix5hd2_priv *priv = netdev_priv(dev);
 672        int ints = readl_relaxed(priv->base + RAW_PMU_INT);
 673
 674        writel_relaxed(ints, priv->base + RAW_PMU_INT);
 675        if (likely(ints & DEF_INT_MASK)) {
 676                hix5hd2_irq_disable(priv);
 677                napi_schedule(&priv->napi);
 678        }
 679
 680        return IRQ_HANDLED;
 681}
 682
 683static u32 hix5hd2_get_desc_cmd(struct sk_buff *skb, unsigned long hw_cap)
 684{
 685        u32 cmd = 0;
 686
 687        if (HAS_CAP_TSO(hw_cap)) {
 688                if (skb_shinfo(skb)->nr_frags)
 689                        cmd |= DESC_SG;
 690                cmd |= skb_shinfo(skb)->nr_frags << DESC_FRAGS_NUM_OFF;
 691        } else {
 692                cmd |= DESC_FL_FULL |
 693                        ((skb->len & DESC_DATA_MASK) << DESC_BUFF_LEN_OFF);
 694        }
 695
 696        cmd |= (skb->len & DESC_DATA_MASK) << DESC_DATA_LEN_OFF;
 697        cmd |= DESC_VLD_BUSY;
 698
 699        return cmd;
 700}
 701
 702static int hix5hd2_fill_sg_desc(struct hix5hd2_priv *priv,
 703                                struct sk_buff *skb, u32 pos)
 704{
 705        struct sg_desc *desc;
 706        dma_addr_t addr;
 707        int ret;
 708        int i;
 709
 710        desc = priv->tx_ring.desc + pos;
 711
 712        desc->total_len = cpu_to_le32(skb->len);
 713        addr = dma_map_single(priv->dev, skb->data, skb_headlen(skb),
 714                              DMA_TO_DEVICE);
 715        if (unlikely(dma_mapping_error(priv->dev, addr)))
 716                return -EINVAL;
 717        desc->linear_addr = cpu_to_le32(addr);
 718        desc->linear_len = cpu_to_le32(skb_headlen(skb));
 719
 720        for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
 721                skb_frag_t *frag = &skb_shinfo(skb)->frags[i];
 722                int len = frag->size;
 723
 724                addr = skb_frag_dma_map(priv->dev, frag, 0, len, DMA_TO_DEVICE);
 725                ret = dma_mapping_error(priv->dev, addr);
 726                if (unlikely(ret))
 727                        return -EINVAL;
 728                desc->frags[i].addr = cpu_to_le32(addr);
 729                desc->frags[i].size = cpu_to_le32(len);
 730        }
 731
 732        return 0;
 733}
 734
 735static netdev_tx_t hix5hd2_net_xmit(struct sk_buff *skb, struct net_device *dev)
 736{
 737        struct hix5hd2_priv *priv = netdev_priv(dev);
 738        struct hix5hd2_desc *desc;
 739        dma_addr_t addr;
 740        u32 pos;
 741        u32 cmd;
 742        int ret;
 743
 744        /* software write pointer */
 745        pos = dma_cnt(readl_relaxed(priv->base + TX_BQ_WR_ADDR));
 746        if (unlikely(priv->tx_skb[pos])) {
 747                dev->stats.tx_dropped++;
 748                dev->stats.tx_fifo_errors++;
 749                netif_stop_queue(dev);
 750                return NETDEV_TX_BUSY;
 751        }
 752
 753        desc = priv->tx_bq.desc + pos;
 754
 755        cmd = hix5hd2_get_desc_cmd(skb, priv->hw_cap);
 756        desc->cmd = cpu_to_le32(cmd);
 757
 758        if (skb_shinfo(skb)->nr_frags) {
 759                ret = hix5hd2_fill_sg_desc(priv, skb, pos);
 760                if (unlikely(ret)) {
 761                        dev_kfree_skb_any(skb);
 762                        dev->stats.tx_dropped++;
 763                        return NETDEV_TX_OK;
 764                }
 765                addr = priv->tx_ring.phys_addr + pos * sizeof(struct sg_desc);
 766        } else {
 767                addr = dma_map_single(priv->dev, skb->data, skb->len,
 768                                      DMA_TO_DEVICE);
 769                if (unlikely(dma_mapping_error(priv->dev, addr))) {
 770                        dev_kfree_skb_any(skb);
 771                        dev->stats.tx_dropped++;
 772                        return NETDEV_TX_OK;
 773                }
 774        }
 775        desc->buff_addr = cpu_to_le32(addr);
 776
 777        priv->tx_skb[pos] = skb;
 778
 779        /* ensure desc updated */
 780        wmb();
 781
 782        pos = dma_ring_incr(pos, TX_DESC_NUM);
 783        writel_relaxed(dma_byte(pos), priv->base + TX_BQ_WR_ADDR);
 784
 785        netif_trans_update(dev);
 786        dev->stats.tx_packets++;
 787        dev->stats.tx_bytes += skb->len;
 788        netdev_sent_queue(dev, skb->len);
 789
 790        return NETDEV_TX_OK;
 791}
 792
 793static void hix5hd2_free_dma_desc_rings(struct hix5hd2_priv *priv)
 794{
 795        struct hix5hd2_desc *desc;
 796        dma_addr_t addr;
 797        int i;
 798
 799        for (i = 0; i < RX_DESC_NUM; i++) {
 800                struct sk_buff *skb = priv->rx_skb[i];
 801                if (skb == NULL)
 802                        continue;
 803
 804                desc = priv->rx_fq.desc + i;
 805                addr = le32_to_cpu(desc->buff_addr);
 806                dma_unmap_single(priv->dev, addr,
 807                                 MAC_MAX_FRAME_SIZE, DMA_FROM_DEVICE);
 808                dev_kfree_skb_any(skb);
 809                priv->rx_skb[i] = NULL;
 810        }
 811
 812        for (i = 0; i < TX_DESC_NUM; i++) {
 813                struct sk_buff *skb = priv->tx_skb[i];
 814                if (skb == NULL)
 815                        continue;
 816
 817                desc = priv->tx_rq.desc + i;
 818                addr = le32_to_cpu(desc->buff_addr);
 819                dma_unmap_single(priv->dev, addr, skb->len, DMA_TO_DEVICE);
 820                dev_kfree_skb_any(skb);
 821                priv->tx_skb[i] = NULL;
 822        }
 823}
 824
 825static int hix5hd2_net_open(struct net_device *dev)
 826{
 827        struct hix5hd2_priv *priv = netdev_priv(dev);
 828        struct phy_device *phy;
 829        int ret;
 830
 831        ret = clk_prepare_enable(priv->mac_core_clk);
 832        if (ret < 0) {
 833                netdev_err(dev, "failed to enable mac core clk %d\n", ret);
 834                return ret;
 835        }
 836
 837        ret = clk_prepare_enable(priv->mac_ifc_clk);
 838        if (ret < 0) {
 839                clk_disable_unprepare(priv->mac_core_clk);
 840                netdev_err(dev, "failed to enable mac ifc clk %d\n", ret);
 841                return ret;
 842        }
 843
 844        phy = of_phy_connect(dev, priv->phy_node,
 845                             &hix5hd2_adjust_link, 0, priv->phy_mode);
 846        if (!phy) {
 847                clk_disable_unprepare(priv->mac_ifc_clk);
 848                clk_disable_unprepare(priv->mac_core_clk);
 849                return -ENODEV;
 850        }
 851
 852        phy_start(phy);
 853        hix5hd2_hw_init(priv);
 854        hix5hd2_rx_refill(priv);
 855
 856        netdev_reset_queue(dev);
 857        netif_start_queue(dev);
 858        napi_enable(&priv->napi);
 859
 860        hix5hd2_port_enable(priv);
 861        hix5hd2_irq_enable(priv);
 862
 863        return 0;
 864}
 865
 866static int hix5hd2_net_close(struct net_device *dev)
 867{
 868        struct hix5hd2_priv *priv = netdev_priv(dev);
 869
 870        hix5hd2_port_disable(priv);
 871        hix5hd2_irq_disable(priv);
 872        napi_disable(&priv->napi);
 873        netif_stop_queue(dev);
 874        hix5hd2_free_dma_desc_rings(priv);
 875
 876        if (dev->phydev) {
 877                phy_stop(dev->phydev);
 878                phy_disconnect(dev->phydev);
 879        }
 880
 881        clk_disable_unprepare(priv->mac_ifc_clk);
 882        clk_disable_unprepare(priv->mac_core_clk);
 883
 884        return 0;
 885}
 886
 887static void hix5hd2_tx_timeout_task(struct work_struct *work)
 888{
 889        struct hix5hd2_priv *priv;
 890
 891        priv = container_of(work, struct hix5hd2_priv, tx_timeout_task);
 892        hix5hd2_net_close(priv->netdev);
 893        hix5hd2_net_open(priv->netdev);
 894}
 895
 896static void hix5hd2_net_timeout(struct net_device *dev)
 897{
 898        struct hix5hd2_priv *priv = netdev_priv(dev);
 899
 900        schedule_work(&priv->tx_timeout_task);
 901}
 902
 903static const struct net_device_ops hix5hd2_netdev_ops = {
 904        .ndo_open               = hix5hd2_net_open,
 905        .ndo_stop               = hix5hd2_net_close,
 906        .ndo_start_xmit         = hix5hd2_net_xmit,
 907        .ndo_tx_timeout         = hix5hd2_net_timeout,
 908        .ndo_set_mac_address    = hix5hd2_net_set_mac_address,
 909};
 910
 911static const struct ethtool_ops hix5hd2_ethtools_ops = {
 912        .get_link               = ethtool_op_get_link,
 913        .get_link_ksettings     = phy_ethtool_get_link_ksettings,
 914        .set_link_ksettings     = phy_ethtool_set_link_ksettings,
 915};
 916
 917static int hix5hd2_mdio_wait_ready(struct mii_bus *bus)
 918{
 919        struct hix5hd2_priv *priv = bus->priv;
 920        void __iomem *base = priv->base;
 921        int i, timeout = 10000;
 922
 923        for (i = 0; readl_relaxed(base + MDIO_SINGLE_CMD) & MDIO_START; i++) {
 924                if (i == timeout)
 925                        return -ETIMEDOUT;
 926                usleep_range(10, 20);
 927        }
 928
 929        return 0;
 930}
 931
 932static int hix5hd2_mdio_read(struct mii_bus *bus, int phy, int reg)
 933{
 934        struct hix5hd2_priv *priv = bus->priv;
 935        void __iomem *base = priv->base;
 936        int val, ret;
 937
 938        ret = hix5hd2_mdio_wait_ready(bus);
 939        if (ret < 0)
 940                goto out;
 941
 942        writel_relaxed(MDIO_READ | phy << 8 | reg, base + MDIO_SINGLE_CMD);
 943        ret = hix5hd2_mdio_wait_ready(bus);
 944        if (ret < 0)
 945                goto out;
 946
 947        val = readl_relaxed(base + MDIO_RDATA_STATUS);
 948        if (val & MDIO_R_VALID) {
 949                dev_err(bus->parent, "SMI bus read not valid\n");
 950                ret = -ENODEV;
 951                goto out;
 952        }
 953
 954        val = readl_relaxed(priv->base + MDIO_SINGLE_DATA);
 955        ret = (val >> 16) & 0xFFFF;
 956out:
 957        return ret;
 958}
 959
 960static int hix5hd2_mdio_write(struct mii_bus *bus, int phy, int reg, u16 val)
 961{
 962        struct hix5hd2_priv *priv = bus->priv;
 963        void __iomem *base = priv->base;
 964        int ret;
 965
 966        ret = hix5hd2_mdio_wait_ready(bus);
 967        if (ret < 0)
 968                goto out;
 969
 970        writel_relaxed(val, base + MDIO_SINGLE_DATA);
 971        writel_relaxed(MDIO_WRITE | phy << 8 | reg, base + MDIO_SINGLE_CMD);
 972        ret = hix5hd2_mdio_wait_ready(bus);
 973out:
 974        return ret;
 975}
 976
 977static void hix5hd2_destroy_hw_desc_queue(struct hix5hd2_priv *priv)
 978{
 979        int i;
 980
 981        for (i = 0; i < QUEUE_NUMS; i++) {
 982                if (priv->pool[i].desc) {
 983                        dma_free_coherent(priv->dev, priv->pool[i].size,
 984                                          priv->pool[i].desc,
 985                                          priv->pool[i].phys_addr);
 986                        priv->pool[i].desc = NULL;
 987                }
 988        }
 989}
 990
 991static int hix5hd2_init_hw_desc_queue(struct hix5hd2_priv *priv)
 992{
 993        struct device *dev = priv->dev;
 994        struct hix5hd2_desc *virt_addr;
 995        dma_addr_t phys_addr;
 996        int size, i;
 997
 998        priv->rx_fq.count = RX_DESC_NUM;
 999        priv->rx_bq.count = RX_DESC_NUM;
1000        priv->tx_bq.count = TX_DESC_NUM;
1001        priv->tx_rq.count = TX_DESC_NUM;
1002
1003        for (i = 0; i < QUEUE_NUMS; i++) {
1004                size = priv->pool[i].count * sizeof(struct hix5hd2_desc);
1005                virt_addr = dma_alloc_coherent(dev, size, &phys_addr,
1006                                               GFP_KERNEL);
1007                if (virt_addr == NULL)
1008                        goto error_free_pool;
1009
1010                priv->pool[i].size = size;
1011                priv->pool[i].desc = virt_addr;
1012                priv->pool[i].phys_addr = phys_addr;
1013        }
1014        return 0;
1015
1016error_free_pool:
1017        hix5hd2_destroy_hw_desc_queue(priv);
1018
1019        return -ENOMEM;
1020}
1021
1022static int hix5hd2_init_sg_desc_queue(struct hix5hd2_priv *priv)
1023{
1024        struct sg_desc *desc;
1025        dma_addr_t phys_addr;
1026
1027        desc = (struct sg_desc *)dma_alloc_coherent(priv->dev,
1028                                TX_DESC_NUM * sizeof(struct sg_desc),
1029                                &phys_addr, GFP_KERNEL);
1030        if (!desc)
1031                return -ENOMEM;
1032
1033        priv->tx_ring.desc = desc;
1034        priv->tx_ring.phys_addr = phys_addr;
1035
1036        return 0;
1037}
1038
1039static void hix5hd2_destroy_sg_desc_queue(struct hix5hd2_priv *priv)
1040{
1041        if (priv->tx_ring.desc) {
1042                dma_free_coherent(priv->dev,
1043                                  TX_DESC_NUM * sizeof(struct sg_desc),
1044                                  priv->tx_ring.desc, priv->tx_ring.phys_addr);
1045                priv->tx_ring.desc = NULL;
1046        }
1047}
1048
1049static inline void hix5hd2_mac_core_reset(struct hix5hd2_priv *priv)
1050{
1051        if (!priv->mac_core_rst)
1052                return;
1053
1054        reset_control_assert(priv->mac_core_rst);
1055        reset_control_deassert(priv->mac_core_rst);
1056}
1057
1058static void hix5hd2_sleep_us(u32 time_us)
1059{
1060        u32 time_ms;
1061
1062        if (!time_us)
1063                return;
1064
1065        time_ms = DIV_ROUND_UP(time_us, 1000);
1066        if (time_ms < 20)
1067                usleep_range(time_us, time_us + 500);
1068        else
1069                msleep(time_ms);
1070}
1071
1072static void hix5hd2_phy_reset(struct hix5hd2_priv *priv)
1073{
1074        /* To make sure PHY hardware reset success,
1075         * we must keep PHY in deassert state first and
1076         * then complete the hardware reset operation
1077         */
1078        reset_control_deassert(priv->phy_rst);
1079        hix5hd2_sleep_us(priv->phy_reset_delays[PRE_DELAY]);
1080
1081        reset_control_assert(priv->phy_rst);
1082        /* delay some time to ensure reset ok,
1083         * this depends on PHY hardware feature
1084         */
1085        hix5hd2_sleep_us(priv->phy_reset_delays[PULSE]);
1086        reset_control_deassert(priv->phy_rst);
1087        /* delay some time to ensure later MDIO access */
1088        hix5hd2_sleep_us(priv->phy_reset_delays[POST_DELAY]);
1089}
1090
1091static const struct of_device_id hix5hd2_of_match[];
1092
1093static int hix5hd2_dev_probe(struct platform_device *pdev)
1094{
1095        struct device *dev = &pdev->dev;
1096        struct device_node *node = dev->of_node;
1097        const struct of_device_id *of_id = NULL;
1098        struct net_device *ndev;
1099        struct hix5hd2_priv *priv;
1100        struct resource *res;
1101        struct mii_bus *bus;
1102        const char *mac_addr;
1103        int ret;
1104
1105        ndev = alloc_etherdev(sizeof(struct hix5hd2_priv));
1106        if (!ndev)
1107                return -ENOMEM;
1108
1109        platform_set_drvdata(pdev, ndev);
1110
1111        priv = netdev_priv(ndev);
1112        priv->dev = dev;
1113        priv->netdev = ndev;
1114
1115        of_id = of_match_device(hix5hd2_of_match, dev);
1116        if (!of_id) {
1117                ret = -EINVAL;
1118                goto out_free_netdev;
1119        }
1120        priv->hw_cap = (unsigned long)of_id->data;
1121
1122        res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1123        priv->base = devm_ioremap_resource(dev, res);
1124        if (IS_ERR(priv->base)) {
1125                ret = PTR_ERR(priv->base);
1126                goto out_free_netdev;
1127        }
1128
1129        res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
1130        priv->ctrl_base = devm_ioremap_resource(dev, res);
1131        if (IS_ERR(priv->ctrl_base)) {
1132                ret = PTR_ERR(priv->ctrl_base);
1133                goto out_free_netdev;
1134        }
1135
1136        priv->mac_core_clk = devm_clk_get(&pdev->dev, "mac_core");
1137        if (IS_ERR(priv->mac_core_clk)) {
1138                netdev_err(ndev, "failed to get mac core clk\n");
1139                ret = -ENODEV;
1140                goto out_free_netdev;
1141        }
1142
1143        ret = clk_prepare_enable(priv->mac_core_clk);
1144        if (ret < 0) {
1145                netdev_err(ndev, "failed to enable mac core clk %d\n", ret);
1146                goto out_free_netdev;
1147        }
1148
1149        priv->mac_ifc_clk = devm_clk_get(&pdev->dev, "mac_ifc");
1150        if (IS_ERR(priv->mac_ifc_clk))
1151                priv->mac_ifc_clk = NULL;
1152
1153        ret = clk_prepare_enable(priv->mac_ifc_clk);
1154        if (ret < 0) {
1155                netdev_err(ndev, "failed to enable mac ifc clk %d\n", ret);
1156                goto out_disable_mac_core_clk;
1157        }
1158
1159        priv->mac_core_rst = devm_reset_control_get(dev, "mac_core");
1160        if (IS_ERR(priv->mac_core_rst))
1161                priv->mac_core_rst = NULL;
1162        hix5hd2_mac_core_reset(priv);
1163
1164        priv->mac_ifc_rst = devm_reset_control_get(dev, "mac_ifc");
1165        if (IS_ERR(priv->mac_ifc_rst))
1166                priv->mac_ifc_rst = NULL;
1167
1168        priv->phy_rst = devm_reset_control_get(dev, "phy");
1169        if (IS_ERR(priv->phy_rst)) {
1170                priv->phy_rst = NULL;
1171        } else {
1172                ret = of_property_read_u32_array(node,
1173                                                 PHY_RESET_DELAYS_PROPERTY,
1174                                                 priv->phy_reset_delays,
1175                                                 DELAYS_NUM);
1176                if (ret)
1177                        goto out_disable_clk;
1178                hix5hd2_phy_reset(priv);
1179        }
1180
1181        bus = mdiobus_alloc();
1182        if (bus == NULL) {
1183                ret = -ENOMEM;
1184                goto out_disable_clk;
1185        }
1186
1187        bus->priv = priv;
1188        bus->name = "hix5hd2_mii_bus";
1189        bus->read = hix5hd2_mdio_read;
1190        bus->write = hix5hd2_mdio_write;
1191        bus->parent = &pdev->dev;
1192        snprintf(bus->id, MII_BUS_ID_SIZE, "%s-mii", dev_name(&pdev->dev));
1193        priv->bus = bus;
1194
1195        ret = of_mdiobus_register(bus, node);
1196        if (ret)
1197                goto err_free_mdio;
1198
1199        priv->phy_mode = of_get_phy_mode(node);
1200        if (priv->phy_mode < 0) {
1201                netdev_err(ndev, "not find phy-mode\n");
1202                ret = -EINVAL;
1203                goto err_mdiobus;
1204        }
1205
1206        priv->phy_node = of_parse_phandle(node, "phy-handle", 0);
1207        if (!priv->phy_node) {
1208                netdev_err(ndev, "not find phy-handle\n");
1209                ret = -EINVAL;
1210                goto err_mdiobus;
1211        }
1212
1213        ndev->irq = platform_get_irq(pdev, 0);
1214        if (ndev->irq <= 0) {
1215                netdev_err(ndev, "No irq resource\n");
1216                ret = -EINVAL;
1217                goto out_phy_node;
1218        }
1219
1220        ret = devm_request_irq(dev, ndev->irq, hix5hd2_interrupt,
1221                               0, pdev->name, ndev);
1222        if (ret) {
1223                netdev_err(ndev, "devm_request_irq failed\n");
1224                goto out_phy_node;
1225        }
1226
1227        mac_addr = of_get_mac_address(node);
1228        if (!IS_ERR(mac_addr))
1229                ether_addr_copy(ndev->dev_addr, mac_addr);
1230        if (!is_valid_ether_addr(ndev->dev_addr)) {
1231                eth_hw_addr_random(ndev);
1232                netdev_warn(ndev, "using random MAC address %pM\n",
1233                            ndev->dev_addr);
1234        }
1235
1236        INIT_WORK(&priv->tx_timeout_task, hix5hd2_tx_timeout_task);
1237        ndev->watchdog_timeo = 6 * HZ;
1238        ndev->priv_flags |= IFF_UNICAST_FLT;
1239        ndev->netdev_ops = &hix5hd2_netdev_ops;
1240        ndev->ethtool_ops = &hix5hd2_ethtools_ops;
1241        SET_NETDEV_DEV(ndev, dev);
1242
1243        if (HAS_CAP_TSO(priv->hw_cap))
1244                ndev->hw_features |= NETIF_F_SG;
1245
1246        ndev->features |= ndev->hw_features | NETIF_F_HIGHDMA;
1247        ndev->vlan_features |= ndev->features;
1248
1249        ret = hix5hd2_init_hw_desc_queue(priv);
1250        if (ret)
1251                goto out_phy_node;
1252
1253        netif_napi_add(ndev, &priv->napi, hix5hd2_poll, NAPI_POLL_WEIGHT);
1254
1255        if (HAS_CAP_TSO(priv->hw_cap)) {
1256                ret = hix5hd2_init_sg_desc_queue(priv);
1257                if (ret)
1258                        goto out_destroy_queue;
1259        }
1260
1261        ret = register_netdev(priv->netdev);
1262        if (ret) {
1263                netdev_err(ndev, "register_netdev failed!");
1264                goto out_destroy_queue;
1265        }
1266
1267        clk_disable_unprepare(priv->mac_ifc_clk);
1268        clk_disable_unprepare(priv->mac_core_clk);
1269
1270        return ret;
1271
1272out_destroy_queue:
1273        if (HAS_CAP_TSO(priv->hw_cap))
1274                hix5hd2_destroy_sg_desc_queue(priv);
1275        netif_napi_del(&priv->napi);
1276        hix5hd2_destroy_hw_desc_queue(priv);
1277out_phy_node:
1278        of_node_put(priv->phy_node);
1279err_mdiobus:
1280        mdiobus_unregister(bus);
1281err_free_mdio:
1282        mdiobus_free(bus);
1283out_disable_clk:
1284        clk_disable_unprepare(priv->mac_ifc_clk);
1285out_disable_mac_core_clk:
1286        clk_disable_unprepare(priv->mac_core_clk);
1287out_free_netdev:
1288        free_netdev(ndev);
1289
1290        return ret;
1291}
1292
1293static int hix5hd2_dev_remove(struct platform_device *pdev)
1294{
1295        struct net_device *ndev = platform_get_drvdata(pdev);
1296        struct hix5hd2_priv *priv = netdev_priv(ndev);
1297
1298        netif_napi_del(&priv->napi);
1299        unregister_netdev(ndev);
1300        mdiobus_unregister(priv->bus);
1301        mdiobus_free(priv->bus);
1302
1303        if (HAS_CAP_TSO(priv->hw_cap))
1304                hix5hd2_destroy_sg_desc_queue(priv);
1305        hix5hd2_destroy_hw_desc_queue(priv);
1306        of_node_put(priv->phy_node);
1307        cancel_work_sync(&priv->tx_timeout_task);
1308        free_netdev(ndev);
1309
1310        return 0;
1311}
1312
1313static const struct of_device_id hix5hd2_of_match[] = {
1314        { .compatible = "hisilicon,hisi-gmac-v1", .data = (void *)GEMAC_V1 },
1315        { .compatible = "hisilicon,hisi-gmac-v2", .data = (void *)GEMAC_V2 },
1316        { .compatible = "hisilicon,hix5hd2-gmac", .data = (void *)GEMAC_V1 },
1317        { .compatible = "hisilicon,hi3798cv200-gmac", .data = (void *)GEMAC_V2 },
1318        { .compatible = "hisilicon,hi3516a-gmac", .data = (void *)GEMAC_V2 },
1319        {},
1320};
1321
1322MODULE_DEVICE_TABLE(of, hix5hd2_of_match);
1323
1324static struct platform_driver hix5hd2_dev_driver = {
1325        .driver = {
1326                .name = "hisi-gmac",
1327                .of_match_table = hix5hd2_of_match,
1328        },
1329        .probe = hix5hd2_dev_probe,
1330        .remove = hix5hd2_dev_remove,
1331};
1332
1333module_platform_driver(hix5hd2_dev_driver);
1334
1335MODULE_DESCRIPTION("HISILICON Gigabit Ethernet MAC driver");
1336MODULE_LICENSE("GPL v2");
1337MODULE_ALIAS("platform:hisi-gmac");
1338