drivers/net/phy/micrel.c

   1 /*
   2  * drivers/net/phy/micrel.c
   3  *
   4  * Driver for Micrel PHYs
   5  *
   6  * Author: David J. Choi
   7  *
   8  * Copyright (c) 2010-2013 Micrel, Inc.
   9  * Copyright (c) 2014 Johan Hovold <johan@kernel.org>
  10  *
  11  * This program is free software; you can redistribute  it and/or modify it
  12  * under  the terms of  the GNU General  Public License as published by the
  13  * Free Software Foundation;  either version 2 of the  License, or (at your
  14  * option) any later version.
  15  *
  16  * Support : Micrel Phys:
  17  *              Giga phys: ksz9021, ksz9031
  18  *              100/10 Phys : ksz8001, ksz8721, ksz8737, ksz8041
  19  *                         ksz8021, ksz8031, ksz8051,
  20  *                         ksz8081, ksz8091,
  21  *                         ksz8061,
  22  *              Switch : ksz8873, ksz886x
  23  */
  24
  25 #include <linux/kernel.h>
  26 #include <linux/module.h>
  27 #include <linux/phy.h>
  28 #include <linux/micrel_phy.h>
  29 #include <linux/of.h>
  30 #include <linux/clk.h>
  31
  32 /* Operation Mode Strap Override */
  33 #define MII_KSZPHY_OMSO                         0x16
  34 #define KSZPHY_OMSO_B_CAST_OFF                  BIT(9)
  35 #define KSZPHY_OMSO_NAND_TREE_ON                BIT(5)
  36 #define KSZPHY_OMSO_RMII_OVERRIDE               BIT(1)
  37 #define KSZPHY_OMSO_MII_OVERRIDE                BIT(0)
  38
  39 /* general Interrupt control/status reg in vendor specific block. */
  40 #define MII_KSZPHY_INTCS                        0x1B
  41 #define KSZPHY_INTCS_JABBER                     BIT(15)
  42 #define KSZPHY_INTCS_RECEIVE_ERR                BIT(14)
  43 #define KSZPHY_INTCS_PAGE_RECEIVE               BIT(13)
  44 #define KSZPHY_INTCS_PARELLEL                   BIT(12)
  45 #define KSZPHY_INTCS_LINK_PARTNER_ACK           BIT(11)
  46 #define KSZPHY_INTCS_LINK_DOWN                  BIT(10)
  47 #define KSZPHY_INTCS_REMOTE_FAULT               BIT(9)
  48 #define KSZPHY_INTCS_LINK_UP                    BIT(8)
  49 #define KSZPHY_INTCS_ALL                        (KSZPHY_INTCS_LINK_UP |\
  50                                                 KSZPHY_INTCS_LINK_DOWN)
  51
  52 /* PHY Control 1 */
  53 #define MII_KSZPHY_CTRL_1                       0x1e
  54
  55 /* PHY Control 2 / PHY Control (if no PHY Control 1) */
  56 #define MII_KSZPHY_CTRL_2                       0x1f
  57 #define MII_KSZPHY_CTRL                         MII_KSZPHY_CTRL_2
  58 /* bitmap of PHY register to set interrupt mode */
  59 #define KSZPHY_CTRL_INT_ACTIVE_HIGH             BIT(9)
  60 #define KSZPHY_RMII_REF_CLK_SEL                 BIT(7)
  61
  62 /* Write/read to/from extended registers */
  63 #define MII_KSZPHY_EXTREG                       0x0b
  64 #define KSZPHY_EXTREG_WRITE                     0x8000
  65
  66 #define MII_KSZPHY_EXTREG_WRITE                 0x0c
  67 #define MII_KSZPHY_EXTREG_READ                  0x0d
  68
  69 /* Extended registers */
  70 #define MII_KSZPHY_CLK_CONTROL_PAD_SKEW         0x104
  71 #define MII_KSZPHY_RX_DATA_PAD_SKEW             0x105
  72 #define MII_KSZPHY_TX_DATA_PAD_SKEW             0x106
  73
  74 #define PS_TO_REG                               200
  75
  76 struct kszphy_hw_stat {
  77         const char *string;
  78         u8 reg;
  79         u8 bits;
  80 };
  81
  82 static struct kszphy_hw_stat kszphy_hw_stats[] = {
  83         { "phy_receive_errors", 21, 16},
  84         { "phy_idle_errors", 10, 8 },
  85 };
  86
  87 struct kszphy_type {
  88         u32 led_mode_reg;
  89         u16 interrupt_level_mask;
  90         bool has_broadcast_disable;
  91         bool has_nand_tree_disable;
  92         bool has_rmii_ref_clk_sel;
  93 };
  94
  95 struct kszphy_priv {
  96         const struct kszphy_type *type;
  97         int led_mode;
  98         bool rmii_ref_clk_sel;
  99         bool rmii_ref_clk_sel_val;
 100         u64 stats[ARRAY_SIZE(kszphy_hw_stats)];
 101 };
 102
 103 static const struct kszphy_type ksz8021_type = {
 104         .led_mode_reg           = MII_KSZPHY_CTRL_2,
 105         .has_broadcast_disable  = true,
 106         .has_nand_tree_disable  = true,
 107         .has_rmii_ref_clk_sel   = true,
 108 };
 109
 110 static const struct kszphy_type ksz8041_type = {
 111         .led_mode_reg           = MII_KSZPHY_CTRL_1,
 112 };
 113
 114 static const struct kszphy_type ksz8051_type = {
 115         .led_mode_reg           = MII_KSZPHY_CTRL_2,
 116         .has_nand_tree_disable  = true,
 117 };
 118
 119 static const struct kszphy_type ksz8081_type = {
 120         .led_mode_reg           = MII_KSZPHY_CTRL_2,
 121         .has_broadcast_disable  = true,
 122         .has_nand_tree_disable  = true,
 123         .has_rmii_ref_clk_sel   = true,
 124 };
 125
 126 static const struct kszphy_type ks8737_type = {
 127         .interrupt_level_mask   = BIT(14),
 128 };
 129
 130 static const struct kszphy_type ksz9021_type = {
 131         .interrupt_level_mask   = BIT(14),
 132 };
 133
 134 static int kszphy_extended_write(struct phy_device *phydev,
 135                                 u32 regnum, u16 val)
 136 {
 137         phy_write(phydev, MII_KSZPHY_EXTREG, KSZPHY_EXTREG_WRITE | regnum);
 138         return phy_write(phydev, MII_KSZPHY_EXTREG_WRITE, val);
 139 }
 140
 141 static int kszphy_extended_read(struct phy_device *phydev,
 142                                 u32 regnum)
 143 {
 144         phy_write(phydev, MII_KSZPHY_EXTREG, regnum);
 145         return phy_read(phydev, MII_KSZPHY_EXTREG_READ);
 146 }
 147
 148 static int kszphy_ack_interrupt(struct phy_device *phydev)
 149 {
 150         /* bit[7..0] int status, which is a read and clear register. */
 151         int rc;
 152
 153         rc = phy_read(phydev, MII_KSZPHY_INTCS);
 154
 155         return (rc < 0) ? rc : 0;
 156 }
 157
 158 static int kszphy_config_intr(struct phy_device *phydev)
 159 {
 160         const struct kszphy_type *type = phydev->drv->driver_data;
 161         int temp;
 162         u16 mask;
 163
 164         if (type && type->interrupt_level_mask)
 165                 mask = type->interrupt_level_mask;
 166         else
 167                 mask = KSZPHY_CTRL_INT_ACTIVE_HIGH;
 168
 169         /* set the interrupt pin active low */
 170         temp = phy_read(phydev, MII_KSZPHY_CTRL);
 171         if (temp < 0)
 172                 return temp;
 173         temp &= ~mask;
 174         phy_write(phydev, MII_KSZPHY_CTRL, temp);
 175
 176         /* enable / disable interrupts */
 177         if (phydev->interrupts == PHY_INTERRUPT_ENABLED)
 178                 temp = KSZPHY_INTCS_ALL;
 179         else
 180                 temp = 0;
 181
 182         return phy_write(phydev, MII_KSZPHY_INTCS, temp);
 183 }
 184
 185 static int kszphy_rmii_clk_sel(struct phy_device *phydev, bool val)
 186 {
 187         int ctrl;
 188
 189         ctrl = phy_read(phydev, MII_KSZPHY_CTRL);
 190         if (ctrl < 0)
 191                 return ctrl;
 192
 193         if (val)
 194                 ctrl |= KSZPHY_RMII_REF_CLK_SEL;
 195         else
 196                 ctrl &= ~KSZPHY_RMII_REF_CLK_SEL;
 197
 198         return phy_write(phydev, MII_KSZPHY_CTRL, ctrl);
 199 }
 200
 201 static int kszphy_setup_led(struct phy_device *phydev, u32 reg, int val)
 202 {
 203         int rc, temp, shift;
 204
 205         switch (reg) {
 206         case MII_KSZPHY_CTRL_1:
 207                 shift = 14;
 208                 break;
 209         case MII_KSZPHY_CTRL_2:
 210                 shift = 4;
 211                 break;
 212         default:
 213                 return -EINVAL;
 214         }
 215
 216         temp = phy_read(phydev, reg);
 217         if (temp < 0) {
 218                 rc = temp;
 219                 goto out;
 220         }
 221
 222         temp &= ~(3 << shift);
 223         temp |= val << shift;
 224         rc = phy_write(phydev, reg, temp);
 225 out:
 226         if (rc < 0)
 227                 phydev_err(phydev, "failed to set led mode\n");
 228
 229         return rc;
 230 }
 231
 232 /* Disable PHY address 0 as the broadcast address, so that it can be used as a
 233  * unique (non-broadcast) address on a shared bus.
 234  */
 235 static int kszphy_broadcast_disable(struct phy_device *phydev)
 236 {
 237         int ret;
 238
 239         ret = phy_read(phydev, MII_KSZPHY_OMSO);
 240         if (ret < 0)
 241                 goto out;
 242
 243         ret = phy_write(phydev, MII_KSZPHY_OMSO, ret | KSZPHY_OMSO_B_CAST_OFF);
 244 out:
 245         if (ret)
 246                 phydev_err(phydev, "failed to disable broadcast address\n");
 247
 248         return ret;
 249 }
 250
 251 static int kszphy_nand_tree_disable(struct phy_device *phydev)
 252 {
 253         int ret;
 254
 255         ret = phy_read(phydev, MII_KSZPHY_OMSO);
 256         if (ret < 0)
 257                 goto out;
 258
 259         if (!(ret & KSZPHY_OMSO_NAND_TREE_ON))
 260                 return 0;
 261
 262         ret = phy_write(phydev, MII_KSZPHY_OMSO,
 263                         ret & ~KSZPHY_OMSO_NAND_TREE_ON);
 264 out:
 265         if (ret)
 266                 phydev_err(phydev, "failed to disable NAND tree mode\n");
 267
 268         return ret;
 269 }
 270
 271 static int kszphy_config_init(struct phy_device *phydev)
 272 {
 273         struct kszphy_priv *priv = phydev->priv;
 274         const struct kszphy_type *type;
 275         int ret;
 276
 277         if (!priv)
 278                 return 0;
 279
 280         type = priv->type;
 281
 282         if (type->has_broadcast_disable)
 283                 kszphy_broadcast_disable(phydev);
 284
 285         if (type->has_nand_tree_disable)
 286                 kszphy_nand_tree_disable(phydev);
 287
 288         if (priv->rmii_ref_clk_sel) {
 289                 ret = kszphy_rmii_clk_sel(phydev, priv->rmii_ref_clk_sel_val);
 290                 if (ret) {
 291                         phydev_err(phydev,
 292                                    "failed to set rmii reference clock\n");
 293                         return ret;
 294                 }
 295         }
 296
 297         if (priv->led_mode >= 0)
 298                 kszphy_setup_led(phydev, type->led_mode_reg, priv->led_mode);
 299
 300         return 0;
 301 }
 302
 303 static int ksz8041_config_init(struct phy_device *phydev)
 304 {
 305         struct device_node *of_node = phydev->mdio.dev.of_node;
 306
 307         /* Limit supported and advertised modes in fiber mode */
 308         if (of_property_read_bool(of_node, "micrel,fiber-mode")) {
 309                 phydev->dev_flags |= MICREL_PHY_FXEN;
 310                 phydev->supported &= SUPPORTED_100baseT_Full |
 311                                      SUPPORTED_100baseT_Half;
 312                 phydev->supported |= SUPPORTED_FIBRE;
 313                 phydev->advertising &= ADVERTISED_100baseT_Full |
 314                                        ADVERTISED_100baseT_Half;
 315                 phydev->advertising |= ADVERTISED_FIBRE;
 316                 phydev->autoneg = AUTONEG_DISABLE;
 317         }
 318
 319         return kszphy_config_init(phydev);
 320 }
 321
 322 static int ksz8041_config_aneg(struct phy_device *phydev)
 323 {
 324         /* Skip auto-negotiation in fiber mode */
 325         if (phydev->dev_flags & MICREL_PHY_FXEN) {
 326                 phydev->speed = SPEED_100;
 327                 return 0;
 328         }
 329
 330         return genphy_config_aneg(phydev);
 331 }
 332
 333 static int ksz9021_load_values_from_of(struct phy_device *phydev,
 334                                        const struct device_node *of_node,
 335                                        u16 reg,
 336                                        const char *field1, const char *field2,
 337                                        const char *field3, const char *field4)
 338 {
 339         int val1 = -1;
 340         int val2 = -2;
 341         int val3 = -3;
 342         int val4 = -4;
 343         int newval;
 344         int matches = 0;
 345
 346         if (!of_property_read_u32(of_node, field1, &val1))
 347                 matches++;
 348
 349         if (!of_property_read_u32(of_node, field2, &val2))
 350                 matches++;
 351
 352         if (!of_property_read_u32(of_node, field3, &val3))
 353                 matches++;
 354
 355         if (!of_property_read_u32(of_node, field4, &val4))
 356                 matches++;
 357
 358         if (!matches)
 359                 return 0;
 360
 361         if (matches < 4)
 362                 newval = kszphy_extended_read(phydev, reg);
 363         else
 364                 newval = 0;
 365
 366         if (val1 != -1)
 367                 newval = ((newval & 0xfff0) | ((val1 / PS_TO_REG) & 0xf) << 0);
 368
 369         if (val2 != -2)
 370                 newval = ((newval & 0xff0f) | ((val2 / PS_TO_REG) & 0xf) << 4);
 371
 372         if (val3 != -3)
 373                 newval = ((newval & 0xf0ff) | ((val3 / PS_TO_REG) & 0xf) << 8);
 374
 375         if (val4 != -4)
 376                 newval = ((newval & 0x0fff) | ((val4 / PS_TO_REG) & 0xf) << 12);
 377
 378         return kszphy_extended_write(phydev, reg, newval);
 379 }
 380
 381 static int ksz9021_config_init(struct phy_device *phydev)
 382 {
 383         const struct device *dev = &phydev->mdio.dev;
 384         const struct device_node *of_node = dev->of_node;
 385         const struct device *dev_walker;
 386
 387         /* The Micrel driver has a deprecated option to place phy OF
 388          * properties in the MAC node. Walk up the tree of devices to
 389          * find a device with an OF node.
 390          */
 391         dev_walker = &phydev->mdio.dev;
 392         do {
 393                 of_node = dev_walker->of_node;
 394                 dev_walker = dev_walker->parent;
 395
 396         } while (!of_node && dev_walker);
 397
 398         if (of_node) {
 399                 ksz9021_load_values_from_of(phydev, of_node,
 400                                     MII_KSZPHY_CLK_CONTROL_PAD_SKEW,
 401                                     "txen-skew-ps", "txc-skew-ps",
 402                                     "rxdv-skew-ps", "rxc-skew-ps");
 403                 ksz9021_load_values_from_of(phydev, of_node,
 404                                     MII_KSZPHY_RX_DATA_PAD_SKEW,
 405                                     "rxd0-skew-ps", "rxd1-skew-ps",
 406                                     "rxd2-skew-ps", "rxd3-skew-ps");
 407                 ksz9021_load_values_from_of(phydev, of_node,
 408                                     MII_KSZPHY_TX_DATA_PAD_SKEW,
 409                                     "txd0-skew-ps", "txd1-skew-ps",
 410                                     "txd2-skew-ps", "txd3-skew-ps");
 411         }
 412         return 0;
 413 }
 414
 415 #define MII_KSZ9031RN_MMD_CTRL_REG      0x0d
 416 #define MII_KSZ9031RN_MMD_REGDATA_REG   0x0e
 417 #define OP_DATA                         1
 418 #define KSZ9031_PS_TO_REG               60
 419
 420 /* Extended registers */
 421 /* MMD Address 0x0 */
 422 #define MII_KSZ9031RN_FLP_BURST_TX_LO   3
 423 #define MII_KSZ9031RN_FLP_BURST_TX_HI   4
 424
 425 /* MMD Address 0x2 */
 426 #define MII_KSZ9031RN_CONTROL_PAD_SKEW  4
 427 #define MII_KSZ9031RN_RX_DATA_PAD_SKEW  5
 428 #define MII_KSZ9031RN_TX_DATA_PAD_SKEW  6
 429 #define MII_KSZ9031RN_CLK_PAD_SKEW      8
 430
 431 /* MMD Address 0x1C */
 432 #define MII_KSZ9031RN_EDPD              0x23
 433 #define MII_KSZ9031RN_EDPD_ENABLE       BIT(0)
 434
 435 static int ksz9031_extended_write(struct phy_device *phydev,
 436                                   u8 mode, u32 dev_addr, u32 regnum, u16 val)
 437 {
 438         phy_write(phydev, MII_KSZ9031RN_MMD_CTRL_REG, dev_addr);
 439         phy_write(phydev, MII_KSZ9031RN_MMD_REGDATA_REG, regnum);
 440         phy_write(phydev, MII_KSZ9031RN_MMD_CTRL_REG, (mode << 14) | dev_addr);
 441         return phy_write(phydev, MII_KSZ9031RN_MMD_REGDATA_REG, val);
 442 }
 443
 444 static int ksz9031_extended_read(struct phy_device *phydev,
 445                                  u8 mode, u32 dev_addr, u32 regnum)
 446 {
 447         phy_write(phydev, MII_KSZ9031RN_MMD_CTRL_REG, dev_addr);
 448         phy_write(phydev, MII_KSZ9031RN_MMD_REGDATA_REG, regnum);
 449         phy_write(phydev, MII_KSZ9031RN_MMD_CTRL_REG, (mode << 14) | dev_addr);
 450         return phy_read(phydev, MII_KSZ9031RN_MMD_REGDATA_REG);
 451 }
 452
 453 static int ksz9031_of_load_skew_values(struct phy_device *phydev,
 454                                        const struct device_node *of_node,
 455                                        u16 reg, size_t field_sz,
 456                                        const char *field[], u8 numfields)
 457 {
 458         int val[4] = {-1, -2, -3, -4};
 459         int matches = 0;
 460         u16 mask;
 461         u16 maxval;
 462         u16 newval;
 463         int i;
 464
 465         for (i = 0; i < numfields; i++)
 466                 if (!of_property_read_u32(of_node, field[i], val + i))
 467                         matches++;
 468
 469         if (!matches)
 470                 return 0;
 471
 472         if (matches < numfields)
 473                 newval = ksz9031_extended_read(phydev, OP_DATA, 2, reg);
 474         else
 475                 newval = 0;
 476
 477         maxval = (field_sz == 4) ? 0xf : 0x1f;
 478         for (i = 0; i < numfields; i++)
 479                 if (val[i] != -(i + 1)) {
 480                         mask = 0xffff;
 481                         mask ^= maxval << (field_sz * i);
 482                         newval = (newval & mask) |
 483                                 (((val[i] / KSZ9031_PS_TO_REG) & maxval)
 484                                         << (field_sz * i));
 485                 }
 486
 487         return ksz9031_extended_write(phydev, OP_DATA, 2, reg, newval);
 488 }
 489
 490 static int ksz9031_center_flp_timing(struct phy_device *phydev)
 491 {
 492         int result;
 493
 494         /* Center KSZ9031RNX FLP timing at 16ms. */
 495         result = ksz9031_extended_write(phydev, OP_DATA, 0,
 496                                         MII_KSZ9031RN_FLP_BURST_TX_HI, 0x0006);
 497         result = ksz9031_extended_write(phydev, OP_DATA, 0,
 498                                         MII_KSZ9031RN_FLP_BURST_TX_LO, 0x1A80);
 499
 500         if (result)
 501                 return result;
 502
 503         return genphy_restart_aneg(phydev);
 504 }
 505
 506 /* Enable energy-detect power-down mode */
 507 static int ksz9031_enable_edpd(struct phy_device *phydev)
 508 {
 509         int reg;
 510
 511         reg = ksz9031_extended_read(phydev, OP_DATA, 0x1C, MII_KSZ9031RN_EDPD);
 512         if (reg < 0)
 513                 return reg;
 514         return ksz9031_extended_write(phydev, OP_DATA, 0x1C, MII_KSZ9031RN_EDPD,
 515                                       reg | MII_KSZ9031RN_EDPD_ENABLE);
 516 }
 517
 518 static int ksz9031_config_init(struct phy_device *phydev)
 519 {
 520         const struct device *dev = &phydev->mdio.dev;
 521         const struct device_node *of_node = dev->of_node;
 522         static const char *clk_skews[2] = {"rxc-skew-ps", "txc-skew-ps"};
 523         static const char *rx_data_skews[4] = {
 524                 "rxd0-skew-ps", "rxd1-skew-ps",
 525                 "rxd2-skew-ps", "rxd3-skew-ps"
 526         };
 527         static const char *tx_data_skews[4] = {
 528                 "txd0-skew-ps", "txd1-skew-ps",
 529                 "txd2-skew-ps", "txd3-skew-ps"
 530         };
 531         static const char *control_skews[2] = {"txen-skew-ps", "rxdv-skew-ps"};
 532         const struct device *dev_walker;
 533         int result;
 534
 535         result = ksz9031_enable_edpd(phydev);
 536         if (result < 0)
 537                 return result;
 538
 539         /* The Micrel driver has a deprecated option to place phy OF
 540          * properties in the MAC node. Walk up the tree of devices to
 541          * find a device with an OF node.
 542          */
 543         dev_walker = &phydev->mdio.dev;
 544         do {
 545                 of_node = dev_walker->of_node;
 546                 dev_walker = dev_walker->parent;
 547         } while (!of_node && dev_walker);
 548
 549         if (of_node) {
 550                 ksz9031_of_load_skew_values(phydev, of_node,
 551                                 MII_KSZ9031RN_CLK_PAD_SKEW, 5,
 552                                 clk_skews, 2);
 553
 554                 ksz9031_of_load_skew_values(phydev, of_node,
 555                                 MII_KSZ9031RN_CONTROL_PAD_SKEW, 4,
 556                                 control_skews, 2);
 557
 558                 ksz9031_of_load_skew_values(phydev, of_node,
 559                                 MII_KSZ9031RN_RX_DATA_PAD_SKEW, 4,
 560                                 rx_data_skews, 4);
 561
 562                 ksz9031_of_load_skew_values(phydev, of_node,
 563                                 MII_KSZ9031RN_TX_DATA_PAD_SKEW, 4,
 564                                 tx_data_skews, 4);
 565         }
 566
 567         return ksz9031_center_flp_timing(phydev);
 568 }
 569
 570 #define KSZ8873MLL_GLOBAL_CONTROL_4     0x06
 571 #define KSZ8873MLL_GLOBAL_CONTROL_4_DUPLEX      BIT(6)
 572 #define KSZ8873MLL_GLOBAL_CONTROL_4_SPEED       BIT(4)
 573 static int ksz8873mll_read_status(struct phy_device *phydev)
 574 {
 575         int regval;
 576
 577         /* dummy read */
 578         regval = phy_read(phydev, KSZ8873MLL_GLOBAL_CONTROL_4);
 579
 580         regval = phy_read(phydev, KSZ8873MLL_GLOBAL_CONTROL_4);
 581
 582         if (regval & KSZ8873MLL_GLOBAL_CONTROL_4_DUPLEX)
 583                 phydev->duplex = DUPLEX_HALF;
 584         else
 585                 phydev->duplex = DUPLEX_FULL;
 586
 587         if (regval & KSZ8873MLL_GLOBAL_CONTROL_4_SPEED)
 588                 phydev->speed = SPEED_10;
 589         else
 590                 phydev->speed = SPEED_100;
 591
 592         phydev->link = 1;
 593         phydev->pause = phydev->asym_pause = 0;
 594
 595         return 0;
 596 }
 597
 598 static int ksz9031_read_status(struct phy_device *phydev)
 599 {
 600         int err;
 601         int regval;
 602
 603         err = genphy_read_status(phydev);
 604         if (err)
 605                 return err;
 606
 607         /* Make sure the PHY is not broken. Read idle error count,
 608          * and reset the PHY if it is maxed out.
 609          */
 610         regval = phy_read(phydev, MII_STAT1000);
 611         if ((regval & 0xFF) == 0xFF) {
 612                 phy_init_hw(phydev);
 613                 phydev->link = 0;
 614         }
 615
 616         return 0;
 617 }
 618
 619 static int ksz8873mll_config_aneg(struct phy_device *phydev)
 620 {
 621         return 0;
 622 }
 623
 624 /* This routine returns -1 as an indication to the caller that the
 625  * Micrel ksz9021 10/100/1000 PHY does not support standard IEEE
 626  * MMD extended PHY registers.
 627  */
 628 static int
 629 ksz9021_rd_mmd_phyreg(struct phy_device *phydev, int devad, u16 regnum)
 630 {
 631         return -1;
 632 }
 633
 634 /* This routine does nothing since the Micrel ksz9021 does not support
 635  * standard IEEE MMD extended PHY registers.
 636  */
 637 static int
 638 ksz9021_wr_mmd_phyreg(struct phy_device *phydev, int devad, u16 regnum, u16 val)
 639 {
 640         return -1;
 641 }
 642
 643 static int kszphy_get_sset_count(struct phy_device *phydev)
 644 {
 645         return ARRAY_SIZE(kszphy_hw_stats);
 646 }
 647
 648 static void kszphy_get_strings(struct phy_device *phydev, u8 *data)
 649 {
 650         int i;
 651
 652         for (i = 0; i < ARRAY_SIZE(kszphy_hw_stats); i++) {
 653                 memcpy(data + i * ETH_GSTRING_LEN,
 654                        kszphy_hw_stats[i].string, ETH_GSTRING_LEN);
 655         }
 656 }
 657
 658 #ifndef UINT64_MAX
 659 #define UINT64_MAX              (u64)(~((u64)0))
 660 #endif
 661 static u64 kszphy_get_stat(struct phy_device *phydev, int i)
 662 {
 663         struct kszphy_hw_stat stat = kszphy_hw_stats[i];
 664         struct kszphy_priv *priv = phydev->priv;
 665         int val;
 666         u64 ret;
 667
 668         val = phy_read(phydev, stat.reg);
 669         if (val < 0) {
 670                 ret = UINT64_MAX;
 671         } else {
 672                 val = val & ((1 << stat.bits) - 1);
 673                 priv->stats[i] += val;
 674                 ret = priv->stats[i];
 675         }
 676
 677         return ret;
 678 }
 679
 680 static void kszphy_get_stats(struct phy_device *phydev,
 681                              struct ethtool_stats *stats, u64 *data)
 682 {
 683         int i;
 684
 685         for (i = 0; i < ARRAY_SIZE(kszphy_hw_stats); i++)
 686                 data[i] = kszphy_get_stat(phydev, i);
 687 }
 688
 689 static int kszphy_suspend(struct phy_device *phydev)
 690 {
 691         /* Disable PHY Interrupts */
 692         if (phy_interrupt_is_valid(phydev)) {
 693                 phydev->interrupts = PHY_INTERRUPT_DISABLED;
 694                 if (phydev->drv->config_intr)
 695                         phydev->drv->config_intr(phydev);
 696         }
 697
 698         return genphy_suspend(phydev);
 699 }
 700
 701 static int kszphy_resume(struct phy_device *phydev)
 702 {
 703         genphy_resume(phydev);
 704
 705         /* Enable PHY Interrupts */
 706         if (phy_interrupt_is_valid(phydev)) {
 707                 phydev->interrupts = PHY_INTERRUPT_ENABLED;
 708                 if (phydev->drv->config_intr)
 709                         phydev->drv->config_intr(phydev);
 710         }
 711
 712         return 0;
 713 }
 714
 715 static int kszphy_probe(struct phy_device *phydev)
 716 {
 717         const struct kszphy_type *type = phydev->drv->driver_data;
 718         const struct device_node *np = phydev->mdio.dev.of_node;
 719         struct kszphy_priv *priv;
 720         struct clk *clk;
 721         int ret;
 722
 723         priv = devm_kzalloc(&phydev->mdio.dev, sizeof(*priv), GFP_KERNEL);
 724         if (!priv)
 725                 return -ENOMEM;
 726
 727         phydev->priv = priv;
 728
 729         priv->type = type;
 730
 731         if (type->led_mode_reg) {
 732                 ret = of_property_read_u32(np, "micrel,led-mode",
 733                                 &priv->led_mode);
 734                 if (ret)
 735                         priv->led_mode = -1;
 736
 737                 if (priv->led_mode > 3) {
 738                         phydev_err(phydev, "invalid led mode: 0x%02x\n",
 739                                    priv->led_mode);
 740                         priv->led_mode = -1;
 741                 }
 742         } else {
 743                 priv->led_mode = -1;
 744         }
 745
 746         clk = devm_clk_get(&phydev->mdio.dev, "rmii-ref");
 747         /* NOTE: clk may be NULL if building without CONFIG_HAVE_CLK */
 748         if (!IS_ERR_OR_NULL(clk)) {
 749                 unsigned long rate = clk_get_rate(clk);
 750                 bool rmii_ref_clk_sel_25_mhz;
 751
 752                 priv->rmii_ref_clk_sel = type->has_rmii_ref_clk_sel;
 753                 rmii_ref_clk_sel_25_mhz = of_property_read_bool(np,
 754                                 "micrel,rmii-reference-clock-select-25-mhz");
 755
 756                 if (rate > 24500000 && rate < 25500000) {
 757                         priv->rmii_ref_clk_sel_val = rmii_ref_clk_sel_25_mhz;
 758                 } else if (rate > 49500000 && rate < 50500000) {
 759                         priv->rmii_ref_clk_sel_val = !rmii_ref_clk_sel_25_mhz;
 760                 } else {
 761                         phydev_err(phydev, "Clock rate out of range: %ld\n",
 762                                    rate);
 763                         return -EINVAL;
 764                 }
 765         }
 766
 767         /* Support legacy board-file configuration */
 768         if (phydev->dev_flags & MICREL_PHY_50MHZ_CLK) {
 769                 priv->rmii_ref_clk_sel = true;
 770                 priv->rmii_ref_clk_sel_val = true;
 771         }
 772
 773         return 0;
 774 }
 775
 776 static struct phy_driver ksphy_driver[] = {
 777 {
 778         .phy_id         = PHY_ID_KS8737,
 779         .phy_id_mask    = MICREL_PHY_ID_MASK,
 780         .name           = "Micrel KS8737",
 781         .features       = PHY_BASIC_FEATURES,
 782         .flags          = PHY_HAS_MAGICANEG | PHY_HAS_INTERRUPT,
 783         .driver_data    = &ks8737_type,
 784         .config_init    = kszphy_config_init,
 785         .config_aneg    = genphy_config_aneg,
 786         .read_status    = genphy_read_status,
 787         .ack_interrupt  = kszphy_ack_interrupt,
 788         .config_intr    = kszphy_config_intr,
 789         .suspend        = genphy_suspend,
 790         .resume         = genphy_resume,
 791 }, {
 792         .phy_id         = PHY_ID_KSZ8021,
 793         .phy_id_mask    = 0x00ffffff,
 794         .name           = "Micrel KSZ8021 or KSZ8031",
 795         .features       = PHY_BASIC_FEATURES,
 796         .flags          = PHY_HAS_MAGICANEG | PHY_HAS_INTERRUPT,
 797         .driver_data    = &ksz8021_type,
 798         .probe          = kszphy_probe,
 799         .config_init    = kszphy_config_init,
 800         .config_aneg    = genphy_config_aneg,
 801         .read_status    = genphy_read_status,
 802         .ack_interrupt  = kszphy_ack_interrupt,
 803         .config_intr    = kszphy_config_intr,
 804         .get_sset_count = kszphy_get_sset_count,
 805         .get_strings    = kszphy_get_strings,
 806         .get_stats      = kszphy_get_stats,
 807         .suspend        = genphy_suspend,
 808         .resume         = genphy_resume,
 809 }, {
 810         .phy_id         = PHY_ID_KSZ8031,
 811         .phy_id_mask    = 0x00ffffff,
 812         .name           = "Micrel KSZ8031",
 813         .features       = PHY_BASIC_FEATURES,
 814         .flags          = PHY_HAS_MAGICANEG | PHY_HAS_INTERRUPT,
 815         .driver_data    = &ksz8021_type,
 816         .probe          = kszphy_probe,
 817         .config_init    = kszphy_config_init,
 818         .config_aneg    = genphy_config_aneg,
 819         .read_status    = genphy_read_status,
 820         .ack_interrupt  = kszphy_ack_interrupt,
 821         .config_intr    = kszphy_config_intr,
 822         .get_sset_count = kszphy_get_sset_count,
 823         .get_strings    = kszphy_get_strings,
 824         .get_stats      = kszphy_get_stats,
 825         .suspend        = genphy_suspend,
 826         .resume         = genphy_resume,
 827 }, {
 828         .phy_id         = PHY_ID_KSZ8041,
 829         .phy_id_mask    = MICREL_PHY_ID_MASK,
 830         .name           = "Micrel KSZ8041",
 831         .features       = PHY_BASIC_FEATURES,
 832         .flags          = PHY_HAS_MAGICANEG | PHY_HAS_INTERRUPT,
 833         .driver_data    = &ksz8041_type,
 834         .probe          = kszphy_probe,
 835         .config_init    = ksz8041_config_init,
 836         .config_aneg    = ksz8041_config_aneg,
 837         .read_status    = genphy_read_status,
 838         .ack_interrupt  = kszphy_ack_interrupt,
 839         .config_intr    = kszphy_config_intr,
 840         .get_sset_count = kszphy_get_sset_count,
 841         .get_strings    = kszphy_get_strings,
 842         .get_stats      = kszphy_get_stats,
 843         .suspend        = genphy_suspend,
 844         .resume         = genphy_resume,
 845 }, {
 846         .phy_id         = PHY_ID_KSZ8041RNLI,
 847         .phy_id_mask    = MICREL_PHY_ID_MASK,
 848         .name           = "Micrel KSZ8041RNLI",
 849         .features       = PHY_BASIC_FEATURES,
 850         .flags          = PHY_HAS_MAGICANEG | PHY_HAS_INTERRUPT,
 851         .driver_data    = &ksz8041_type,
 852         .probe          = kszphy_probe,
 853         .config_init    = kszphy_config_init,
 854         .config_aneg    = genphy_config_aneg,
 855         .read_status    = genphy_read_status,
 856         .ack_interrupt  = kszphy_ack_interrupt,
 857         .config_intr    = kszphy_config_intr,
 858         .get_sset_count = kszphy_get_sset_count,
 859         .get_strings    = kszphy_get_strings,
 860         .get_stats      = kszphy_get_stats,
 861         .suspend        = genphy_suspend,
 862         .resume         = genphy_resume,
 863 }, {
 864         .phy_id         = PHY_ID_KSZ8051,
 865         .phy_id_mask    = MICREL_PHY_ID_MASK,
 866         .name           = "Micrel KSZ8051",
 867         .features       = PHY_BASIC_FEATURES,
 868         .flags          = PHY_HAS_MAGICANEG | PHY_HAS_INTERRUPT,
 869         .driver_data    = &ksz8051_type,
 870         .probe          = kszphy_probe,
 871         .config_init    = kszphy_config_init,
 872         .config_aneg    = genphy_config_aneg,
 873         .read_status    = genphy_read_status,
 874         .ack_interrupt  = kszphy_ack_interrupt,
 875         .config_intr    = kszphy_config_intr,
 876         .get_sset_count = kszphy_get_sset_count,
 877         .get_strings    = kszphy_get_strings,
 878         .get_stats      = kszphy_get_stats,
 879         .suspend        = genphy_suspend,
 880         .resume         = genphy_resume,
 881 }, {
 882         .phy_id         = PHY_ID_KSZ8001,
 883         .name           = "Micrel KSZ8001 or KS8721",
 884         .phy_id_mask    = 0x00fffffc,
 885         .features       = PHY_BASIC_FEATURES,
 886         .flags          = PHY_HAS_MAGICANEG | PHY_HAS_INTERRUPT,
 887         .driver_data    = &ksz8041_type,
 888         .probe          = kszphy_probe,
 889         .config_init    = kszphy_config_init,
 890         .config_aneg    = genphy_config_aneg,
 891         .read_status    = genphy_read_status,
 892         .ack_interrupt  = kszphy_ack_interrupt,
 893         .config_intr    = kszphy_config_intr,
 894         .get_sset_count = kszphy_get_sset_count,
 895         .get_strings    = kszphy_get_strings,
 896         .get_stats      = kszphy_get_stats,
 897         .suspend        = genphy_suspend,
 898         .resume         = genphy_resume,
 899 }, {
 900         .phy_id         = PHY_ID_KSZ8081,
 901         .name           = "Micrel KSZ8081 or KSZ8091",
 902         .phy_id_mask    = MICREL_PHY_ID_MASK,
 903         .features       = PHY_BASIC_FEATURES,
 904         .flags          = PHY_HAS_MAGICANEG | PHY_HAS_INTERRUPT,
 905         .driver_data    = &ksz8081_type,
 906         .probe          = kszphy_probe,
 907         .config_init    = kszphy_config_init,
 908         .config_aneg    = genphy_config_aneg,
 909         .read_status    = genphy_read_status,
 910         .ack_interrupt  = kszphy_ack_interrupt,
 911         .config_intr    = kszphy_config_intr,
 912         .get_sset_count = kszphy_get_sset_count,
 913         .get_strings    = kszphy_get_strings,
 914         .get_stats      = kszphy_get_stats,
 915         .suspend        = kszphy_suspend,
 916         .resume         = kszphy_resume,
 917 }, {
 918         .phy_id         = PHY_ID_KSZ8061,
 919         .name           = "Micrel KSZ8061",
 920         .phy_id_mask    = MICREL_PHY_ID_MASK,
 921         .features       = PHY_BASIC_FEATURES,
 922         .flags          = PHY_HAS_MAGICANEG | PHY_HAS_INTERRUPT,
 923         .config_init    = kszphy_config_init,
 924         .config_aneg    = genphy_config_aneg,
 925         .read_status    = genphy_read_status,
 926         .ack_interrupt  = kszphy_ack_interrupt,
 927         .config_intr    = kszphy_config_intr,
 928         .suspend        = genphy_suspend,
 929         .resume         = genphy_resume,
 930 }, {
 931         .phy_id         = PHY_ID_KSZ9021,
 932         .phy_id_mask    = 0x000ffffe,
 933         .name           = "Micrel KSZ9021 Gigabit PHY",
 934         .features       = PHY_GBIT_FEATURES,
 935         .flags          = PHY_HAS_MAGICANEG | PHY_HAS_INTERRUPT,
 936         .driver_data    = &ksz9021_type,
 937         .probe          = kszphy_probe,
 938         .config_init    = ksz9021_config_init,
 939         .config_aneg    = genphy_config_aneg,
 940         .read_status    = genphy_read_status,
 941         .ack_interrupt  = kszphy_ack_interrupt,
 942         .config_intr    = kszphy_config_intr,
 943         .get_sset_count = kszphy_get_sset_count,
 944         .get_strings    = kszphy_get_strings,
 945         .get_stats      = kszphy_get_stats,
 946         .suspend        = genphy_suspend,
 947         .resume         = genphy_resume,
 948         .read_mmd       = ksz9021_rd_mmd_phyreg,
 949         .write_mmd      = ksz9021_wr_mmd_phyreg,
 950 }, {
 951         .phy_id         = PHY_ID_KSZ9031,
 952         .phy_id_mask    = MICREL_PHY_ID_MASK,
 953         .name           = "Micrel KSZ9031 Gigabit PHY",
 954         .features       = PHY_GBIT_FEATURES,
 955         .flags          = PHY_HAS_MAGICANEG | PHY_HAS_INTERRUPT,
 956         .driver_data    = &ksz9021_type,
 957         .probe          = kszphy_probe,
 958         .config_init    = ksz9031_config_init,
 959         .config_aneg    = genphy_config_aneg,
 960         .read_status    = ksz9031_read_status,
 961         .ack_interrupt  = kszphy_ack_interrupt,
 962         .config_intr    = kszphy_config_intr,
 963         .get_sset_count = kszphy_get_sset_count,
 964         .get_strings    = kszphy_get_strings,
 965         .get_stats      = kszphy_get_stats,
 966         .suspend        = genphy_suspend,
 967         .resume         = kszphy_resume,
 968 }, {
 969         .phy_id         = PHY_ID_KSZ8873MLL,
 970         .phy_id_mask    = MICREL_PHY_ID_MASK,
 971         .name           = "Micrel KSZ8873MLL Switch",
 972         .flags          = PHY_HAS_MAGICANEG,
 973         .config_init    = kszphy_config_init,
 974         .config_aneg    = ksz8873mll_config_aneg,
 975         .read_status    = ksz8873mll_read_status,
 976         .suspend        = genphy_suspend,
 977         .resume         = genphy_resume,
 978 }, {
 979         .phy_id         = PHY_ID_KSZ886X,
 980         .phy_id_mask    = MICREL_PHY_ID_MASK,
 981         .name           = "Micrel KSZ886X Switch",
 982         .features       = PHY_BASIC_FEATURES,
 983         .flags          = PHY_HAS_MAGICANEG | PHY_HAS_INTERRUPT,
 984         .config_init    = kszphy_config_init,
 985         .config_aneg    = genphy_config_aneg,
 986         .read_status    = genphy_read_status,
 987         .suspend        = genphy_suspend,
 988         .resume         = genphy_resume,
 989 }, {
 990         .phy_id         = PHY_ID_KSZ8795,
 991         .phy_id_mask    = MICREL_PHY_ID_MASK,
 992         .name           = "Micrel KSZ8795",
 993         .features       = PHY_BASIC_FEATURES,
 994         .flags          = PHY_HAS_MAGICANEG | PHY_HAS_INTERRUPT,
 995         .config_init    = kszphy_config_init,
 996         .config_aneg    = ksz8873mll_config_aneg,
 997         .read_status    = ksz8873mll_read_status,
 998         .suspend        = genphy_suspend,
 999         .resume         = genphy_resume,
1000 } };
1001
1002 module_phy_driver(ksphy_driver);
1003
1004 MODULE_DESCRIPTION("Micrel PHY driver");
1005 MODULE_AUTHOR("David J. Choi");
1006 MODULE_LICENSE("GPL");
1007
1008 static struct mdio_device_id __maybe_unused micrel_tbl[] = {
1009         { PHY_ID_KSZ9021, 0x000ffffe },
1010         { PHY_ID_KSZ9031, MICREL_PHY_ID_MASK },
1011         { PHY_ID_KSZ8001, 0x00fffffc },
1012         { PHY_ID_KS8737, MICREL_PHY_ID_MASK },
1013         { PHY_ID_KSZ8021, 0x00ffffff },
1014         { PHY_ID_KSZ8031, 0x00ffffff },
1015         { PHY_ID_KSZ8041, MICREL_PHY_ID_MASK },
1016         { PHY_ID_KSZ8051, MICREL_PHY_ID_MASK },
1017         { PHY_ID_KSZ8061, MICREL_PHY_ID_MASK },
1018         { PHY_ID_KSZ8081, MICREL_PHY_ID_MASK },
1019         { PHY_ID_KSZ8873MLL, MICREL_PHY_ID_MASK },
1020         { PHY_ID_KSZ886X, MICREL_PHY_ID_MASK },
1021         { }
1022 };
1023
1024 MODULE_DEVICE_TABLE(mdio, micrel_tbl);