linux/drivers/phy/mscc/phy-ocelot-serdes.c
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   1// SPDX-License-Identifier: (GPL-2.0 OR MIT)
   2/*
   3 * SerDes PHY driver for Microsemi Ocelot
   4 *
   5 * Copyright (c) 2018 Microsemi
   6 *
   7 */
   8
   9#include <linux/err.h>
  10#include <linux/mfd/syscon.h>
  11#include <linux/module.h>
  12#include <linux/of.h>
  13#include <linux/of_platform.h>
  14#include <linux/phy.h>
  15#include <linux/phy/phy.h>
  16#include <linux/platform_device.h>
  17#include <linux/regmap.h>
  18#include <soc/mscc/ocelot_hsio.h>
  19#include <dt-bindings/phy/phy-ocelot-serdes.h>
  20
  21struct serdes_ctrl {
  22        struct regmap           *regs;
  23        struct device           *dev;
  24        struct phy              *phys[SERDES_MAX];
  25};
  26
  27struct serdes_macro {
  28        u8                      idx;
  29        /* Not used when in QSGMII or PCIe mode */
  30        int                     port;
  31        struct serdes_ctrl      *ctrl;
  32};
  33
  34#define MCB_S6G_CFG_TIMEOUT     50
  35
  36static int __serdes_write_mcb_s6g(struct regmap *regmap, u8 macro, u32 op)
  37{
  38        unsigned int regval = 0;
  39
  40        regmap_write(regmap, HSIO_MCB_S6G_ADDR_CFG, op |
  41                     HSIO_MCB_S6G_ADDR_CFG_SERDES6G_ADDR(BIT(macro)));
  42
  43        return regmap_read_poll_timeout(regmap, HSIO_MCB_S6G_ADDR_CFG, regval,
  44                                        (regval & op) != op, 100,
  45                                        MCB_S6G_CFG_TIMEOUT * 1000);
  46}
  47
  48static int serdes_commit_mcb_s6g(struct regmap *regmap, u8 macro)
  49{
  50        return __serdes_write_mcb_s6g(regmap, macro,
  51                HSIO_MCB_S6G_ADDR_CFG_SERDES6G_WR_ONE_SHOT);
  52}
  53
  54static int serdes_update_mcb_s6g(struct regmap *regmap, u8 macro)
  55{
  56        return __serdes_write_mcb_s6g(regmap, macro,
  57                HSIO_MCB_S6G_ADDR_CFG_SERDES6G_RD_ONE_SHOT);
  58}
  59
  60static int serdes_init_s6g(struct regmap *regmap, u8 serdes, int mode)
  61{
  62        u32 pll_fsm_ctrl_data;
  63        u32 ob_ena1v_mode;
  64        u32 des_bw_ana;
  65        u32 ob_ena_cas;
  66        u32 if_mode;
  67        u32 ob_lev;
  68        u32 qrate;
  69        int ret;
  70
  71        if (mode == PHY_INTERFACE_MODE_QSGMII) {
  72                pll_fsm_ctrl_data = 120;
  73                ob_ena1v_mode = 0;
  74                ob_ena_cas = 0;
  75                des_bw_ana = 5;
  76                ob_lev = 24;
  77                if_mode = 3;
  78                qrate = 0;
  79        } else {
  80                pll_fsm_ctrl_data = 60;
  81                ob_ena1v_mode = 1;
  82                ob_ena_cas = 2;
  83                des_bw_ana = 3;
  84                ob_lev = 48;
  85                if_mode = 1;
  86                qrate = 1;
  87        }
  88
  89        ret = serdes_update_mcb_s6g(regmap, serdes);
  90        if (ret)
  91                return ret;
  92
  93        /* Test pattern */
  94
  95        regmap_update_bits(regmap, HSIO_S6G_COMMON_CFG,
  96                           HSIO_S6G_COMMON_CFG_SYS_RST, 0);
  97
  98        regmap_update_bits(regmap, HSIO_S6G_PLL_CFG,
  99                           HSIO_S6G_PLL_CFG_PLL_FSM_ENA, 0);
 100
 101        regmap_update_bits(regmap, HSIO_S6G_IB_CFG,
 102                           HSIO_S6G_IB_CFG_IB_SIG_DET_ENA |
 103                           HSIO_S6G_IB_CFG_IB_REG_ENA |
 104                           HSIO_S6G_IB_CFG_IB_SAM_ENA |
 105                           HSIO_S6G_IB_CFG_IB_EQZ_ENA |
 106                           HSIO_S6G_IB_CFG_IB_CONCUR |
 107                           HSIO_S6G_IB_CFG_IB_CAL_ENA,
 108                           HSIO_S6G_IB_CFG_IB_SIG_DET_ENA |
 109                           HSIO_S6G_IB_CFG_IB_REG_ENA |
 110                           HSIO_S6G_IB_CFG_IB_SAM_ENA |
 111                           HSIO_S6G_IB_CFG_IB_EQZ_ENA |
 112                           HSIO_S6G_IB_CFG_IB_CONCUR);
 113
 114        regmap_update_bits(regmap, HSIO_S6G_IB_CFG1,
 115                           HSIO_S6G_IB_CFG1_IB_FRC_OFFSET |
 116                           HSIO_S6G_IB_CFG1_IB_FRC_LP |
 117                           HSIO_S6G_IB_CFG1_IB_FRC_MID |
 118                           HSIO_S6G_IB_CFG1_IB_FRC_HP |
 119                           HSIO_S6G_IB_CFG1_IB_FILT_OFFSET |
 120                           HSIO_S6G_IB_CFG1_IB_FILT_LP |
 121                           HSIO_S6G_IB_CFG1_IB_FILT_MID |
 122                           HSIO_S6G_IB_CFG1_IB_FILT_HP,
 123                           HSIO_S6G_IB_CFG1_IB_FILT_OFFSET |
 124                           HSIO_S6G_IB_CFG1_IB_FILT_HP |
 125                           HSIO_S6G_IB_CFG1_IB_FILT_LP |
 126                           HSIO_S6G_IB_CFG1_IB_FILT_MID);
 127
 128        regmap_update_bits(regmap, HSIO_S6G_IB_CFG2,
 129                           HSIO_S6G_IB_CFG2_IB_UREG_M,
 130                           HSIO_S6G_IB_CFG2_IB_UREG(4));
 131
 132        regmap_update_bits(regmap, HSIO_S6G_IB_CFG3,
 133                           HSIO_S6G_IB_CFG3_IB_INI_OFFSET_M |
 134                           HSIO_S6G_IB_CFG3_IB_INI_LP_M |
 135                           HSIO_S6G_IB_CFG3_IB_INI_MID_M |
 136                           HSIO_S6G_IB_CFG3_IB_INI_HP_M,
 137                           HSIO_S6G_IB_CFG3_IB_INI_OFFSET(31) |
 138                           HSIO_S6G_IB_CFG3_IB_INI_LP(1) |
 139                           HSIO_S6G_IB_CFG3_IB_INI_MID(31) |
 140                           HSIO_S6G_IB_CFG3_IB_INI_HP(0));
 141
 142        regmap_update_bits(regmap, HSIO_S6G_MISC_CFG,
 143                           HSIO_S6G_MISC_CFG_LANE_RST,
 144                           HSIO_S6G_MISC_CFG_LANE_RST);
 145
 146        ret = serdes_commit_mcb_s6g(regmap, serdes);
 147        if (ret)
 148                return ret;
 149
 150        /* OB + DES + IB + SER CFG */
 151        regmap_update_bits(regmap, HSIO_S6G_OB_CFG,
 152                           HSIO_S6G_OB_CFG_OB_IDLE |
 153                           HSIO_S6G_OB_CFG_OB_ENA1V_MODE |
 154                           HSIO_S6G_OB_CFG_OB_POST0_M |
 155                           HSIO_S6G_OB_CFG_OB_PREC_M,
 156                           (ob_ena1v_mode ? HSIO_S6G_OB_CFG_OB_ENA1V_MODE : 0) |
 157                           HSIO_S6G_OB_CFG_OB_POST0(0) |
 158                           HSIO_S6G_OB_CFG_OB_PREC(0));
 159
 160        regmap_update_bits(regmap, HSIO_S6G_OB_CFG1,
 161                           HSIO_S6G_OB_CFG1_OB_ENA_CAS_M |
 162                           HSIO_S6G_OB_CFG1_OB_LEV_M,
 163                           HSIO_S6G_OB_CFG1_OB_LEV(ob_lev) |
 164                           HSIO_S6G_OB_CFG1_OB_ENA_CAS(ob_ena_cas));
 165
 166        regmap_update_bits(regmap, HSIO_S6G_DES_CFG,
 167                           HSIO_S6G_DES_CFG_DES_PHS_CTRL_M |
 168                           HSIO_S6G_DES_CFG_DES_CPMD_SEL_M |
 169                           HSIO_S6G_DES_CFG_DES_BW_ANA_M,
 170                           HSIO_S6G_DES_CFG_DES_PHS_CTRL(2) |
 171                           HSIO_S6G_DES_CFG_DES_CPMD_SEL(0) |
 172                           HSIO_S6G_DES_CFG_DES_BW_ANA(des_bw_ana));
 173
 174        regmap_update_bits(regmap, HSIO_S6G_IB_CFG,
 175                           HSIO_S6G_IB_CFG_IB_SIG_DET_CLK_SEL_M |
 176                           HSIO_S6G_IB_CFG_IB_REG_PAT_SEL_OFFSET_M,
 177                           HSIO_S6G_IB_CFG_IB_REG_PAT_SEL_OFFSET(0) |
 178                           HSIO_S6G_IB_CFG_IB_SIG_DET_CLK_SEL(0));
 179
 180        regmap_update_bits(regmap, HSIO_S6G_IB_CFG1,
 181                           HSIO_S6G_IB_CFG1_IB_TSDET_M,
 182                           HSIO_S6G_IB_CFG1_IB_TSDET(16));
 183
 184        regmap_update_bits(regmap, HSIO_S6G_SER_CFG,
 185                           HSIO_S6G_SER_CFG_SER_ALISEL_M |
 186                           HSIO_S6G_SER_CFG_SER_ENALI,
 187                           HSIO_S6G_SER_CFG_SER_ALISEL(0));
 188
 189        regmap_update_bits(regmap, HSIO_S6G_PLL_CFG,
 190                           HSIO_S6G_PLL_CFG_PLL_DIV4 |
 191                           HSIO_S6G_PLL_CFG_PLL_ENA_ROT |
 192                           HSIO_S6G_PLL_CFG_PLL_FSM_CTRL_DATA_M |
 193                           HSIO_S6G_PLL_CFG_PLL_ROT_DIR |
 194                           HSIO_S6G_PLL_CFG_PLL_ROT_FRQ,
 195                           HSIO_S6G_PLL_CFG_PLL_FSM_CTRL_DATA
 196                           (pll_fsm_ctrl_data));
 197
 198        regmap_update_bits(regmap, HSIO_S6G_COMMON_CFG,
 199                           HSIO_S6G_COMMON_CFG_SYS_RST |
 200                           HSIO_S6G_COMMON_CFG_ENA_LANE |
 201                           HSIO_S6G_COMMON_CFG_PWD_RX |
 202                           HSIO_S6G_COMMON_CFG_PWD_TX |
 203                           HSIO_S6G_COMMON_CFG_HRATE |
 204                           HSIO_S6G_COMMON_CFG_QRATE |
 205                           HSIO_S6G_COMMON_CFG_ENA_ELOOP |
 206                           HSIO_S6G_COMMON_CFG_ENA_FLOOP |
 207                           HSIO_S6G_COMMON_CFG_IF_MODE_M,
 208                           HSIO_S6G_COMMON_CFG_SYS_RST |
 209                           HSIO_S6G_COMMON_CFG_ENA_LANE |
 210                           (qrate ? HSIO_S6G_COMMON_CFG_QRATE : 0) |
 211                           HSIO_S6G_COMMON_CFG_IF_MODE(if_mode));
 212
 213        regmap_update_bits(regmap, HSIO_S6G_MISC_CFG,
 214                           HSIO_S6G_MISC_CFG_LANE_RST |
 215                           HSIO_S6G_MISC_CFG_DES_100FX_CPMD_ENA |
 216                           HSIO_S6G_MISC_CFG_RX_LPI_MODE_ENA |
 217                           HSIO_S6G_MISC_CFG_TX_LPI_MODE_ENA,
 218                           HSIO_S6G_MISC_CFG_LANE_RST |
 219                           HSIO_S6G_MISC_CFG_RX_LPI_MODE_ENA);
 220
 221
 222        ret = serdes_commit_mcb_s6g(regmap, serdes);
 223        if (ret)
 224                return ret;
 225
 226        regmap_update_bits(regmap, HSIO_S6G_PLL_CFG,
 227                           HSIO_S6G_PLL_CFG_PLL_FSM_ENA,
 228                           HSIO_S6G_PLL_CFG_PLL_FSM_ENA);
 229
 230        ret = serdes_commit_mcb_s6g(regmap, serdes);
 231        if (ret)
 232                return ret;
 233
 234        /* Wait for PLL bringup */
 235        msleep(20);
 236
 237        regmap_update_bits(regmap, HSIO_S6G_IB_CFG,
 238                           HSIO_S6G_IB_CFG_IB_CAL_ENA,
 239                           HSIO_S6G_IB_CFG_IB_CAL_ENA);
 240
 241        regmap_update_bits(regmap, HSIO_S6G_MISC_CFG,
 242                           HSIO_S6G_MISC_CFG_LANE_RST, 0);
 243
 244        ret = serdes_commit_mcb_s6g(regmap, serdes);
 245        if (ret)
 246                return ret;
 247
 248        /* Wait for calibration */
 249        msleep(60);
 250
 251        regmap_update_bits(regmap, HSIO_S6G_IB_CFG,
 252                           HSIO_S6G_IB_CFG_IB_REG_PAT_SEL_OFFSET_M |
 253                           HSIO_S6G_IB_CFG_IB_SIG_DET_CLK_SEL_M,
 254                           HSIO_S6G_IB_CFG_IB_REG_PAT_SEL_OFFSET(0) |
 255                           HSIO_S6G_IB_CFG_IB_SIG_DET_CLK_SEL(7));
 256
 257        regmap_update_bits(regmap, HSIO_S6G_IB_CFG1,
 258                           HSIO_S6G_IB_CFG1_IB_TSDET_M,
 259                           HSIO_S6G_IB_CFG1_IB_TSDET(3));
 260
 261        /* IB CFG */
 262
 263        return 0;
 264}
 265
 266#define MCB_S1G_CFG_TIMEOUT     50
 267
 268static int __serdes_write_mcb_s1g(struct regmap *regmap, u8 macro, u32 op)
 269{
 270        unsigned int regval;
 271
 272        regmap_write(regmap, HSIO_MCB_S1G_ADDR_CFG, op |
 273                     HSIO_MCB_S1G_ADDR_CFG_SERDES1G_ADDR(BIT(macro)));
 274
 275        return regmap_read_poll_timeout(regmap, HSIO_MCB_S1G_ADDR_CFG, regval,
 276                                        (regval & op) != op, 100,
 277                                        MCB_S1G_CFG_TIMEOUT * 1000);
 278}
 279
 280static int serdes_commit_mcb_s1g(struct regmap *regmap, u8 macro)
 281{
 282        return __serdes_write_mcb_s1g(regmap, macro,
 283                HSIO_MCB_S1G_ADDR_CFG_SERDES1G_WR_ONE_SHOT);
 284}
 285
 286static int serdes_update_mcb_s1g(struct regmap *regmap, u8 macro)
 287{
 288        return __serdes_write_mcb_s1g(regmap, macro,
 289                HSIO_MCB_S1G_ADDR_CFG_SERDES1G_RD_ONE_SHOT);
 290}
 291
 292static int serdes_init_s1g(struct regmap *regmap, u8 serdes)
 293{
 294        int ret;
 295
 296        ret = serdes_update_mcb_s1g(regmap, serdes);
 297        if (ret)
 298                return ret;
 299
 300        regmap_update_bits(regmap, HSIO_S1G_COMMON_CFG,
 301                           HSIO_S1G_COMMON_CFG_SYS_RST |
 302                           HSIO_S1G_COMMON_CFG_ENA_LANE |
 303                           HSIO_S1G_COMMON_CFG_ENA_ELOOP |
 304                           HSIO_S1G_COMMON_CFG_ENA_FLOOP,
 305                           HSIO_S1G_COMMON_CFG_ENA_LANE);
 306
 307        regmap_update_bits(regmap, HSIO_S1G_PLL_CFG,
 308                           HSIO_S1G_PLL_CFG_PLL_FSM_ENA |
 309                           HSIO_S1G_PLL_CFG_PLL_FSM_CTRL_DATA_M,
 310                           HSIO_S1G_PLL_CFG_PLL_FSM_CTRL_DATA(200) |
 311                           HSIO_S1G_PLL_CFG_PLL_FSM_ENA);
 312
 313        regmap_update_bits(regmap, HSIO_S1G_MISC_CFG,
 314                           HSIO_S1G_MISC_CFG_DES_100FX_CPMD_ENA |
 315                           HSIO_S1G_MISC_CFG_LANE_RST,
 316                           HSIO_S1G_MISC_CFG_LANE_RST);
 317
 318        ret = serdes_commit_mcb_s1g(regmap, serdes);
 319        if (ret)
 320                return ret;
 321
 322        regmap_update_bits(regmap, HSIO_S1G_COMMON_CFG,
 323                           HSIO_S1G_COMMON_CFG_SYS_RST,
 324                           HSIO_S1G_COMMON_CFG_SYS_RST);
 325
 326        regmap_update_bits(regmap, HSIO_S1G_MISC_CFG,
 327                           HSIO_S1G_MISC_CFG_LANE_RST, 0);
 328
 329        ret = serdes_commit_mcb_s1g(regmap, serdes);
 330        if (ret)
 331                return ret;
 332
 333        return 0;
 334}
 335
 336struct serdes_mux {
 337        u8                      idx;
 338        u8                      port;
 339        enum phy_mode           mode;
 340        int                     submode;
 341        u32                     mask;
 342        u32                     mux;
 343};
 344
 345#define SERDES_MUX(_idx, _port, _mode, _submode, _mask, _mux) { \
 346        .idx = _idx,                                            \
 347        .port = _port,                                          \
 348        .mode = _mode,                                          \
 349        .submode = _submode,                                    \
 350        .mask = _mask,                                          \
 351        .mux = _mux,                                            \
 352}
 353
 354#define SERDES_MUX_SGMII(i, p, m, c) \
 355        SERDES_MUX(i, p, PHY_MODE_ETHERNET, PHY_INTERFACE_MODE_SGMII, m, c)
 356#define SERDES_MUX_QSGMII(i, p, m, c) \
 357        SERDES_MUX(i, p, PHY_MODE_ETHERNET, PHY_INTERFACE_MODE_QSGMII, m, c)
 358
 359static const struct serdes_mux ocelot_serdes_muxes[] = {
 360        SERDES_MUX_SGMII(SERDES1G(0), 0, 0, 0),
 361        SERDES_MUX_SGMII(SERDES1G(1), 1, HSIO_HW_CFG_DEV1G_5_MODE, 0),
 362        SERDES_MUX_SGMII(SERDES1G(1), 5, HSIO_HW_CFG_QSGMII_ENA |
 363                         HSIO_HW_CFG_DEV1G_5_MODE, HSIO_HW_CFG_DEV1G_5_MODE),
 364        SERDES_MUX_SGMII(SERDES1G(2), 2, HSIO_HW_CFG_DEV1G_4_MODE, 0),
 365        SERDES_MUX_SGMII(SERDES1G(2), 4, HSIO_HW_CFG_QSGMII_ENA |
 366                         HSIO_HW_CFG_DEV1G_4_MODE, HSIO_HW_CFG_DEV1G_4_MODE),
 367        SERDES_MUX_SGMII(SERDES1G(3), 3, HSIO_HW_CFG_DEV1G_6_MODE, 0),
 368        SERDES_MUX_SGMII(SERDES1G(3), 6, HSIO_HW_CFG_QSGMII_ENA |
 369                         HSIO_HW_CFG_DEV1G_6_MODE, HSIO_HW_CFG_DEV1G_6_MODE),
 370        SERDES_MUX_SGMII(SERDES1G(4), 4, HSIO_HW_CFG_QSGMII_ENA |
 371                         HSIO_HW_CFG_DEV1G_4_MODE | HSIO_HW_CFG_DEV1G_9_MODE,
 372                         0),
 373        SERDES_MUX_SGMII(SERDES1G(4), 9, HSIO_HW_CFG_DEV1G_4_MODE |
 374                         HSIO_HW_CFG_DEV1G_9_MODE, HSIO_HW_CFG_DEV1G_4_MODE |
 375                         HSIO_HW_CFG_DEV1G_9_MODE),
 376        SERDES_MUX_SGMII(SERDES1G(5), 5, HSIO_HW_CFG_QSGMII_ENA |
 377                         HSIO_HW_CFG_DEV1G_5_MODE | HSIO_HW_CFG_DEV2G5_10_MODE,
 378                         0),
 379        SERDES_MUX_SGMII(SERDES1G(5), 10, HSIO_HW_CFG_PCIE_ENA |
 380                         HSIO_HW_CFG_DEV1G_5_MODE | HSIO_HW_CFG_DEV2G5_10_MODE,
 381                         HSIO_HW_CFG_DEV1G_5_MODE | HSIO_HW_CFG_DEV2G5_10_MODE),
 382        SERDES_MUX_QSGMII(SERDES6G(0), 4, HSIO_HW_CFG_QSGMII_ENA,
 383                          HSIO_HW_CFG_QSGMII_ENA),
 384        SERDES_MUX_QSGMII(SERDES6G(0), 5, HSIO_HW_CFG_QSGMII_ENA,
 385                          HSIO_HW_CFG_QSGMII_ENA),
 386        SERDES_MUX_QSGMII(SERDES6G(0), 6, HSIO_HW_CFG_QSGMII_ENA,
 387                          HSIO_HW_CFG_QSGMII_ENA),
 388        SERDES_MUX_SGMII(SERDES6G(0), 7, HSIO_HW_CFG_QSGMII_ENA, 0),
 389        SERDES_MUX_QSGMII(SERDES6G(0), 7, HSIO_HW_CFG_QSGMII_ENA,
 390                          HSIO_HW_CFG_QSGMII_ENA),
 391        SERDES_MUX_SGMII(SERDES6G(1), 8, 0, 0),
 392        SERDES_MUX_SGMII(SERDES6G(2), 10, HSIO_HW_CFG_PCIE_ENA |
 393                         HSIO_HW_CFG_DEV2G5_10_MODE, 0),
 394        SERDES_MUX(SERDES6G(2), 10, PHY_MODE_PCIE, 0, HSIO_HW_CFG_PCIE_ENA,
 395                   HSIO_HW_CFG_PCIE_ENA),
 396};
 397
 398static int serdes_set_mode(struct phy *phy, enum phy_mode mode, int submode)
 399{
 400        struct serdes_macro *macro = phy_get_drvdata(phy);
 401        unsigned int i;
 402        int ret;
 403
 404        /* As of now only PHY_MODE_ETHERNET is supported */
 405        if (mode != PHY_MODE_ETHERNET)
 406                return -EOPNOTSUPP;
 407
 408        for (i = 0; i < ARRAY_SIZE(ocelot_serdes_muxes); i++) {
 409                if (macro->idx != ocelot_serdes_muxes[i].idx ||
 410                    mode != ocelot_serdes_muxes[i].mode ||
 411                    submode != ocelot_serdes_muxes[i].submode)
 412                        continue;
 413
 414                if (submode != PHY_INTERFACE_MODE_QSGMII &&
 415                    macro->port != ocelot_serdes_muxes[i].port)
 416                        continue;
 417
 418                ret = regmap_update_bits(macro->ctrl->regs, HSIO_HW_CFG,
 419                                         ocelot_serdes_muxes[i].mask,
 420                                         ocelot_serdes_muxes[i].mux);
 421                if (ret)
 422                        return ret;
 423
 424                if (macro->idx <= SERDES1G_MAX)
 425                        return serdes_init_s1g(macro->ctrl->regs, macro->idx);
 426                else if (macro->idx <= SERDES6G_MAX)
 427                        return serdes_init_s6g(macro->ctrl->regs,
 428                                               macro->idx - (SERDES1G_MAX + 1),
 429                                               ocelot_serdes_muxes[i].submode);
 430
 431                /* PCIe not supported yet */
 432                return -EOPNOTSUPP;
 433        }
 434
 435        return -EINVAL;
 436}
 437
 438static const struct phy_ops serdes_ops = {
 439        .set_mode       = serdes_set_mode,
 440        .owner          = THIS_MODULE,
 441};
 442
 443static struct phy *serdes_simple_xlate(struct device *dev,
 444                                       struct of_phandle_args *args)
 445{
 446        struct serdes_ctrl *ctrl = dev_get_drvdata(dev);
 447        unsigned int port, idx, i;
 448
 449        if (args->args_count != 2)
 450                return ERR_PTR(-EINVAL);
 451
 452        port = args->args[0];
 453        idx = args->args[1];
 454
 455        for (i = 0; i < SERDES_MAX; i++) {
 456                struct serdes_macro *macro = phy_get_drvdata(ctrl->phys[i]);
 457
 458                if (idx != macro->idx)
 459                        continue;
 460
 461                /* SERDES6G(0) is the only SerDes capable of QSGMII */
 462                if (idx != SERDES6G(0) && macro->port >= 0)
 463                        return ERR_PTR(-EBUSY);
 464
 465                macro->port = port;
 466                return ctrl->phys[i];
 467        }
 468
 469        return ERR_PTR(-ENODEV);
 470}
 471
 472static int serdes_phy_create(struct serdes_ctrl *ctrl, u8 idx, struct phy **phy)
 473{
 474        struct serdes_macro *macro;
 475
 476        *phy = devm_phy_create(ctrl->dev, NULL, &serdes_ops);
 477        if (IS_ERR(*phy))
 478                return PTR_ERR(*phy);
 479
 480        macro = devm_kzalloc(ctrl->dev, sizeof(*macro), GFP_KERNEL);
 481        if (!macro)
 482                return -ENOMEM;
 483
 484        macro->idx = idx;
 485        macro->ctrl = ctrl;
 486        macro->port = -1;
 487
 488        phy_set_drvdata(*phy, macro);
 489
 490        return 0;
 491}
 492
 493static int serdes_probe(struct platform_device *pdev)
 494{
 495        struct phy_provider *provider;
 496        struct serdes_ctrl *ctrl;
 497        unsigned int i;
 498        int ret;
 499
 500        ctrl = devm_kzalloc(&pdev->dev, sizeof(*ctrl), GFP_KERNEL);
 501        if (!ctrl)
 502                return -ENOMEM;
 503
 504        ctrl->dev = &pdev->dev;
 505        ctrl->regs = syscon_node_to_regmap(pdev->dev.parent->of_node);
 506        if (IS_ERR(ctrl->regs))
 507                return PTR_ERR(ctrl->regs);
 508
 509        for (i = 0; i < SERDES_MAX; i++) {
 510                ret = serdes_phy_create(ctrl, i, &ctrl->phys[i]);
 511                if (ret)
 512                        return ret;
 513        }
 514
 515        dev_set_drvdata(&pdev->dev, ctrl);
 516
 517        provider = devm_of_phy_provider_register(ctrl->dev,
 518                                                 serdes_simple_xlate);
 519
 520        return PTR_ERR_OR_ZERO(provider);
 521}
 522
 523static const struct of_device_id serdes_ids[] = {
 524        { .compatible = "mscc,vsc7514-serdes", },
 525        {},
 526};
 527MODULE_DEVICE_TABLE(of, serdes_ids);
 528
 529static struct platform_driver mscc_ocelot_serdes = {
 530        .probe          = serdes_probe,
 531        .driver         = {
 532                .name   = "mscc,ocelot-serdes",
 533                .of_match_table = of_match_ptr(serdes_ids),
 534        },
 535};
 536
 537module_platform_driver(mscc_ocelot_serdes);
 538
 539MODULE_AUTHOR("Quentin Schulz <quentin.schulz@bootlin.com>");
 540MODULE_DESCRIPTION("SerDes driver for Microsemi Ocelot");
 541MODULE_LICENSE("Dual MIT/GPL");
 542