linux/drivers/net/dsa/microchip/ksz8795.c
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   1// SPDX-License-Identifier: GPL-2.0
   2/*
   3 * Microchip KSZ8795 switch driver
   4 *
   5 * Copyright (C) 2017 Microchip Technology Inc.
   6 *      Tristram Ha <Tristram.Ha@microchip.com>
   7 */
   8
   9#include <linux/delay.h>
  10#include <linux/export.h>
  11#include <linux/gpio.h>
  12#include <linux/kernel.h>
  13#include <linux/module.h>
  14#include <linux/platform_data/microchip-ksz.h>
  15#include <linux/phy.h>
  16#include <linux/etherdevice.h>
  17#include <linux/if_bridge.h>
  18#include <net/dsa.h>
  19#include <net/switchdev.h>
  20
  21#include "ksz_common.h"
  22#include "ksz8795_reg.h"
  23
  24static const struct {
  25        char string[ETH_GSTRING_LEN];
  26} mib_names[] = {
  27        { "rx_hi" },
  28        { "rx_undersize" },
  29        { "rx_fragments" },
  30        { "rx_oversize" },
  31        { "rx_jabbers" },
  32        { "rx_symbol_err" },
  33        { "rx_crc_err" },
  34        { "rx_align_err" },
  35        { "rx_mac_ctrl" },
  36        { "rx_pause" },
  37        { "rx_bcast" },
  38        { "rx_mcast" },
  39        { "rx_ucast" },
  40        { "rx_64_or_less" },
  41        { "rx_65_127" },
  42        { "rx_128_255" },
  43        { "rx_256_511" },
  44        { "rx_512_1023" },
  45        { "rx_1024_1522" },
  46        { "rx_1523_2000" },
  47        { "rx_2001" },
  48        { "tx_hi" },
  49        { "tx_late_col" },
  50        { "tx_pause" },
  51        { "tx_bcast" },
  52        { "tx_mcast" },
  53        { "tx_ucast" },
  54        { "tx_deferred" },
  55        { "tx_total_col" },
  56        { "tx_exc_col" },
  57        { "tx_single_col" },
  58        { "tx_mult_col" },
  59        { "rx_total" },
  60        { "tx_total" },
  61        { "rx_discards" },
  62        { "tx_discards" },
  63};
  64
  65static void ksz_cfg(struct ksz_device *dev, u32 addr, u8 bits, bool set)
  66{
  67        regmap_update_bits(dev->regmap[0], addr, bits, set ? bits : 0);
  68}
  69
  70static void ksz_port_cfg(struct ksz_device *dev, int port, int offset, u8 bits,
  71                         bool set)
  72{
  73        regmap_update_bits(dev->regmap[0], PORT_CTRL_ADDR(port, offset),
  74                           bits, set ? bits : 0);
  75}
  76
  77static int ksz8795_reset_switch(struct ksz_device *dev)
  78{
  79        /* reset switch */
  80        ksz_write8(dev, REG_POWER_MANAGEMENT_1,
  81                   SW_SOFTWARE_POWER_DOWN << SW_POWER_MANAGEMENT_MODE_S);
  82        ksz_write8(dev, REG_POWER_MANAGEMENT_1, 0);
  83
  84        return 0;
  85}
  86
  87static void ksz8795_set_prio_queue(struct ksz_device *dev, int port, int queue)
  88{
  89        u8 hi, lo;
  90
  91        /* Number of queues can only be 1, 2, or 4. */
  92        switch (queue) {
  93        case 4:
  94        case 3:
  95                queue = PORT_QUEUE_SPLIT_4;
  96                break;
  97        case 2:
  98                queue = PORT_QUEUE_SPLIT_2;
  99                break;
 100        default:
 101                queue = PORT_QUEUE_SPLIT_1;
 102        }
 103        ksz_pread8(dev, port, REG_PORT_CTRL_0, &lo);
 104        ksz_pread8(dev, port, P_DROP_TAG_CTRL, &hi);
 105        lo &= ~PORT_QUEUE_SPLIT_L;
 106        if (queue & PORT_QUEUE_SPLIT_2)
 107                lo |= PORT_QUEUE_SPLIT_L;
 108        hi &= ~PORT_QUEUE_SPLIT_H;
 109        if (queue & PORT_QUEUE_SPLIT_4)
 110                hi |= PORT_QUEUE_SPLIT_H;
 111        ksz_pwrite8(dev, port, REG_PORT_CTRL_0, lo);
 112        ksz_pwrite8(dev, port, P_DROP_TAG_CTRL, hi);
 113
 114        /* Default is port based for egress rate limit. */
 115        if (queue != PORT_QUEUE_SPLIT_1)
 116                ksz_cfg(dev, REG_SW_CTRL_19, SW_OUT_RATE_LIMIT_QUEUE_BASED,
 117                        true);
 118}
 119
 120static void ksz8795_r_mib_cnt(struct ksz_device *dev, int port, u16 addr,
 121                              u64 *cnt)
 122{
 123        u16 ctrl_addr;
 124        u32 data;
 125        u8 check;
 126        int loop;
 127
 128        ctrl_addr = addr + dev->reg_mib_cnt * port;
 129        ctrl_addr |= IND_ACC_TABLE(TABLE_MIB | TABLE_READ);
 130
 131        mutex_lock(&dev->alu_mutex);
 132        ksz_write16(dev, REG_IND_CTRL_0, ctrl_addr);
 133
 134        /* It is almost guaranteed to always read the valid bit because of
 135         * slow SPI speed.
 136         */
 137        for (loop = 2; loop > 0; loop--) {
 138                ksz_read8(dev, REG_IND_MIB_CHECK, &check);
 139
 140                if (check & MIB_COUNTER_VALID) {
 141                        ksz_read32(dev, REG_IND_DATA_LO, &data);
 142                        if (check & MIB_COUNTER_OVERFLOW)
 143                                *cnt += MIB_COUNTER_VALUE + 1;
 144                        *cnt += data & MIB_COUNTER_VALUE;
 145                        break;
 146                }
 147        }
 148        mutex_unlock(&dev->alu_mutex);
 149}
 150
 151static void ksz8795_r_mib_pkt(struct ksz_device *dev, int port, u16 addr,
 152                              u64 *dropped, u64 *cnt)
 153{
 154        u16 ctrl_addr;
 155        u32 data;
 156        u8 check;
 157        int loop;
 158
 159        addr -= dev->reg_mib_cnt;
 160        ctrl_addr = (KS_MIB_TOTAL_RX_1 - KS_MIB_TOTAL_RX_0) * port;
 161        ctrl_addr += addr + KS_MIB_TOTAL_RX_0;
 162        ctrl_addr |= IND_ACC_TABLE(TABLE_MIB | TABLE_READ);
 163
 164        mutex_lock(&dev->alu_mutex);
 165        ksz_write16(dev, REG_IND_CTRL_0, ctrl_addr);
 166
 167        /* It is almost guaranteed to always read the valid bit because of
 168         * slow SPI speed.
 169         */
 170        for (loop = 2; loop > 0; loop--) {
 171                ksz_read8(dev, REG_IND_MIB_CHECK, &check);
 172
 173                if (check & MIB_COUNTER_VALID) {
 174                        ksz_read32(dev, REG_IND_DATA_LO, &data);
 175                        if (addr < 2) {
 176                                u64 total;
 177
 178                                total = check & MIB_TOTAL_BYTES_H;
 179                                total <<= 32;
 180                                *cnt += total;
 181                                *cnt += data;
 182                                if (check & MIB_COUNTER_OVERFLOW) {
 183                                        total = MIB_TOTAL_BYTES_H + 1;
 184                                        total <<= 32;
 185                                        *cnt += total;
 186                                }
 187                        } else {
 188                                if (check & MIB_COUNTER_OVERFLOW)
 189                                        *cnt += MIB_PACKET_DROPPED + 1;
 190                                *cnt += data & MIB_PACKET_DROPPED;
 191                        }
 192                        break;
 193                }
 194        }
 195        mutex_unlock(&dev->alu_mutex);
 196}
 197
 198static void ksz8795_freeze_mib(struct ksz_device *dev, int port, bool freeze)
 199{
 200        /* enable the port for flush/freeze function */
 201        if (freeze)
 202                ksz_cfg(dev, REG_SW_CTRL_6, BIT(port), true);
 203        ksz_cfg(dev, REG_SW_CTRL_6, SW_MIB_COUNTER_FREEZE, freeze);
 204
 205        /* disable the port after freeze is done */
 206        if (!freeze)
 207                ksz_cfg(dev, REG_SW_CTRL_6, BIT(port), false);
 208}
 209
 210static void ksz8795_port_init_cnt(struct ksz_device *dev, int port)
 211{
 212        struct ksz_port_mib *mib = &dev->ports[port].mib;
 213
 214        /* flush all enabled port MIB counters */
 215        ksz_cfg(dev, REG_SW_CTRL_6, BIT(port), true);
 216        ksz_cfg(dev, REG_SW_CTRL_6, SW_MIB_COUNTER_FLUSH, true);
 217        ksz_cfg(dev, REG_SW_CTRL_6, BIT(port), false);
 218
 219        mib->cnt_ptr = 0;
 220
 221        /* Some ports may not have MIB counters before SWITCH_COUNTER_NUM. */
 222        while (mib->cnt_ptr < dev->reg_mib_cnt) {
 223                dev->dev_ops->r_mib_cnt(dev, port, mib->cnt_ptr,
 224                                        &mib->counters[mib->cnt_ptr]);
 225                ++mib->cnt_ptr;
 226        }
 227
 228        /* Some ports may not have MIB counters after SWITCH_COUNTER_NUM. */
 229        while (mib->cnt_ptr < dev->mib_cnt) {
 230                dev->dev_ops->r_mib_pkt(dev, port, mib->cnt_ptr,
 231                                        NULL, &mib->counters[mib->cnt_ptr]);
 232                ++mib->cnt_ptr;
 233        }
 234        mib->cnt_ptr = 0;
 235        memset(mib->counters, 0, dev->mib_cnt * sizeof(u64));
 236}
 237
 238static void ksz8795_r_table(struct ksz_device *dev, int table, u16 addr,
 239                            u64 *data)
 240{
 241        u16 ctrl_addr;
 242
 243        ctrl_addr = IND_ACC_TABLE(table | TABLE_READ) | addr;
 244
 245        mutex_lock(&dev->alu_mutex);
 246        ksz_write16(dev, REG_IND_CTRL_0, ctrl_addr);
 247        ksz_read64(dev, REG_IND_DATA_HI, data);
 248        mutex_unlock(&dev->alu_mutex);
 249}
 250
 251static void ksz8795_w_table(struct ksz_device *dev, int table, u16 addr,
 252                            u64 data)
 253{
 254        u16 ctrl_addr;
 255
 256        ctrl_addr = IND_ACC_TABLE(table) | addr;
 257
 258        mutex_lock(&dev->alu_mutex);
 259        ksz_write64(dev, REG_IND_DATA_HI, data);
 260        ksz_write16(dev, REG_IND_CTRL_0, ctrl_addr);
 261        mutex_unlock(&dev->alu_mutex);
 262}
 263
 264static int ksz8795_valid_dyn_entry(struct ksz_device *dev, u8 *data)
 265{
 266        int timeout = 100;
 267
 268        do {
 269                ksz_read8(dev, REG_IND_DATA_CHECK, data);
 270                timeout--;
 271        } while ((*data & DYNAMIC_MAC_TABLE_NOT_READY) && timeout);
 272
 273        /* Entry is not ready for accessing. */
 274        if (*data & DYNAMIC_MAC_TABLE_NOT_READY) {
 275                return -EAGAIN;
 276        /* Entry is ready for accessing. */
 277        } else {
 278                ksz_read8(dev, REG_IND_DATA_8, data);
 279
 280                /* There is no valid entry in the table. */
 281                if (*data & DYNAMIC_MAC_TABLE_MAC_EMPTY)
 282                        return -ENXIO;
 283        }
 284        return 0;
 285}
 286
 287static int ksz8795_r_dyn_mac_table(struct ksz_device *dev, u16 addr,
 288                                   u8 *mac_addr, u8 *fid, u8 *src_port,
 289                                   u8 *timestamp, u16 *entries)
 290{
 291        u32 data_hi, data_lo;
 292        u16 ctrl_addr;
 293        u8 data;
 294        int rc;
 295
 296        ctrl_addr = IND_ACC_TABLE(TABLE_DYNAMIC_MAC | TABLE_READ) | addr;
 297
 298        mutex_lock(&dev->alu_mutex);
 299        ksz_write16(dev, REG_IND_CTRL_0, ctrl_addr);
 300
 301        rc = ksz8795_valid_dyn_entry(dev, &data);
 302        if (rc == -EAGAIN) {
 303                if (addr == 0)
 304                        *entries = 0;
 305        } else if (rc == -ENXIO) {
 306                *entries = 0;
 307        /* At least one valid entry in the table. */
 308        } else {
 309                u64 buf = 0;
 310                int cnt;
 311
 312                ksz_read64(dev, REG_IND_DATA_HI, &buf);
 313                data_hi = (u32)(buf >> 32);
 314                data_lo = (u32)buf;
 315
 316                /* Check out how many valid entry in the table. */
 317                cnt = data & DYNAMIC_MAC_TABLE_ENTRIES_H;
 318                cnt <<= DYNAMIC_MAC_ENTRIES_H_S;
 319                cnt |= (data_hi & DYNAMIC_MAC_TABLE_ENTRIES) >>
 320                        DYNAMIC_MAC_ENTRIES_S;
 321                *entries = cnt + 1;
 322
 323                *fid = (data_hi & DYNAMIC_MAC_TABLE_FID) >>
 324                        DYNAMIC_MAC_FID_S;
 325                *src_port = (data_hi & DYNAMIC_MAC_TABLE_SRC_PORT) >>
 326                        DYNAMIC_MAC_SRC_PORT_S;
 327                *timestamp = (data_hi & DYNAMIC_MAC_TABLE_TIMESTAMP) >>
 328                        DYNAMIC_MAC_TIMESTAMP_S;
 329
 330                mac_addr[5] = (u8)data_lo;
 331                mac_addr[4] = (u8)(data_lo >> 8);
 332                mac_addr[3] = (u8)(data_lo >> 16);
 333                mac_addr[2] = (u8)(data_lo >> 24);
 334
 335                mac_addr[1] = (u8)data_hi;
 336                mac_addr[0] = (u8)(data_hi >> 8);
 337                rc = 0;
 338        }
 339        mutex_unlock(&dev->alu_mutex);
 340
 341        return rc;
 342}
 343
 344static int ksz8795_r_sta_mac_table(struct ksz_device *dev, u16 addr,
 345                                   struct alu_struct *alu)
 346{
 347        u32 data_hi, data_lo;
 348        u64 data;
 349
 350        ksz8795_r_table(dev, TABLE_STATIC_MAC, addr, &data);
 351        data_hi = data >> 32;
 352        data_lo = (u32)data;
 353        if (data_hi & (STATIC_MAC_TABLE_VALID | STATIC_MAC_TABLE_OVERRIDE)) {
 354                alu->mac[5] = (u8)data_lo;
 355                alu->mac[4] = (u8)(data_lo >> 8);
 356                alu->mac[3] = (u8)(data_lo >> 16);
 357                alu->mac[2] = (u8)(data_lo >> 24);
 358                alu->mac[1] = (u8)data_hi;
 359                alu->mac[0] = (u8)(data_hi >> 8);
 360                alu->port_forward = (data_hi & STATIC_MAC_TABLE_FWD_PORTS) >>
 361                        STATIC_MAC_FWD_PORTS_S;
 362                alu->is_override =
 363                        (data_hi & STATIC_MAC_TABLE_OVERRIDE) ? 1 : 0;
 364                data_hi >>= 1;
 365                alu->is_use_fid = (data_hi & STATIC_MAC_TABLE_USE_FID) ? 1 : 0;
 366                alu->fid = (data_hi & STATIC_MAC_TABLE_FID) >>
 367                        STATIC_MAC_FID_S;
 368                return 0;
 369        }
 370        return -ENXIO;
 371}
 372
 373static void ksz8795_w_sta_mac_table(struct ksz_device *dev, u16 addr,
 374                                    struct alu_struct *alu)
 375{
 376        u32 data_hi, data_lo;
 377        u64 data;
 378
 379        data_lo = ((u32)alu->mac[2] << 24) |
 380                ((u32)alu->mac[3] << 16) |
 381                ((u32)alu->mac[4] << 8) | alu->mac[5];
 382        data_hi = ((u32)alu->mac[0] << 8) | alu->mac[1];
 383        data_hi |= (u32)alu->port_forward << STATIC_MAC_FWD_PORTS_S;
 384
 385        if (alu->is_override)
 386                data_hi |= STATIC_MAC_TABLE_OVERRIDE;
 387        if (alu->is_use_fid) {
 388                data_hi |= STATIC_MAC_TABLE_USE_FID;
 389                data_hi |= (u32)alu->fid << STATIC_MAC_FID_S;
 390        }
 391        if (alu->is_static)
 392                data_hi |= STATIC_MAC_TABLE_VALID;
 393        else
 394                data_hi &= ~STATIC_MAC_TABLE_OVERRIDE;
 395
 396        data = (u64)data_hi << 32 | data_lo;
 397        ksz8795_w_table(dev, TABLE_STATIC_MAC, addr, data);
 398}
 399
 400static void ksz8795_from_vlan(u16 vlan, u8 *fid, u8 *member, u8 *valid)
 401{
 402        *fid = vlan & VLAN_TABLE_FID;
 403        *member = (vlan & VLAN_TABLE_MEMBERSHIP) >> VLAN_TABLE_MEMBERSHIP_S;
 404        *valid = !!(vlan & VLAN_TABLE_VALID);
 405}
 406
 407static void ksz8795_to_vlan(u8 fid, u8 member, u8 valid, u16 *vlan)
 408{
 409        *vlan = fid;
 410        *vlan |= (u16)member << VLAN_TABLE_MEMBERSHIP_S;
 411        if (valid)
 412                *vlan |= VLAN_TABLE_VALID;
 413}
 414
 415static void ksz8795_r_vlan_entries(struct ksz_device *dev, u16 addr)
 416{
 417        u64 data;
 418        int i;
 419
 420        ksz8795_r_table(dev, TABLE_VLAN, addr, &data);
 421        addr *= dev->phy_port_cnt;
 422        for (i = 0; i < dev->phy_port_cnt; i++) {
 423                dev->vlan_cache[addr + i].table[0] = (u16)data;
 424                data >>= VLAN_TABLE_S;
 425        }
 426}
 427
 428static void ksz8795_r_vlan_table(struct ksz_device *dev, u16 vid, u16 *vlan)
 429{
 430        int index;
 431        u16 *data;
 432        u16 addr;
 433        u64 buf;
 434
 435        data = (u16 *)&buf;
 436        addr = vid / dev->phy_port_cnt;
 437        index = vid & 3;
 438        ksz8795_r_table(dev, TABLE_VLAN, addr, &buf);
 439        *vlan = data[index];
 440}
 441
 442static void ksz8795_w_vlan_table(struct ksz_device *dev, u16 vid, u16 vlan)
 443{
 444        int index;
 445        u16 *data;
 446        u16 addr;
 447        u64 buf;
 448
 449        data = (u16 *)&buf;
 450        addr = vid / dev->phy_port_cnt;
 451        index = vid & 3;
 452        ksz8795_r_table(dev, TABLE_VLAN, addr, &buf);
 453        data[index] = vlan;
 454        dev->vlan_cache[vid].table[0] = vlan;
 455        ksz8795_w_table(dev, TABLE_VLAN, addr, buf);
 456}
 457
 458static void ksz8795_r_phy(struct ksz_device *dev, u16 phy, u16 reg, u16 *val)
 459{
 460        u8 restart, speed, ctrl, link;
 461        int processed = true;
 462        u16 data = 0;
 463        u8 p = phy;
 464
 465        switch (reg) {
 466        case PHY_REG_CTRL:
 467                ksz_pread8(dev, p, P_NEG_RESTART_CTRL, &restart);
 468                ksz_pread8(dev, p, P_SPEED_STATUS, &speed);
 469                ksz_pread8(dev, p, P_FORCE_CTRL, &ctrl);
 470                if (restart & PORT_PHY_LOOPBACK)
 471                        data |= PHY_LOOPBACK;
 472                if (ctrl & PORT_FORCE_100_MBIT)
 473                        data |= PHY_SPEED_100MBIT;
 474                if (!(ctrl & PORT_AUTO_NEG_DISABLE))
 475                        data |= PHY_AUTO_NEG_ENABLE;
 476                if (restart & PORT_POWER_DOWN)
 477                        data |= PHY_POWER_DOWN;
 478                if (restart & PORT_AUTO_NEG_RESTART)
 479                        data |= PHY_AUTO_NEG_RESTART;
 480                if (ctrl & PORT_FORCE_FULL_DUPLEX)
 481                        data |= PHY_FULL_DUPLEX;
 482                if (speed & PORT_HP_MDIX)
 483                        data |= PHY_HP_MDIX;
 484                if (restart & PORT_FORCE_MDIX)
 485                        data |= PHY_FORCE_MDIX;
 486                if (restart & PORT_AUTO_MDIX_DISABLE)
 487                        data |= PHY_AUTO_MDIX_DISABLE;
 488                if (restart & PORT_TX_DISABLE)
 489                        data |= PHY_TRANSMIT_DISABLE;
 490                if (restart & PORT_LED_OFF)
 491                        data |= PHY_LED_DISABLE;
 492                break;
 493        case PHY_REG_STATUS:
 494                ksz_pread8(dev, p, P_LINK_STATUS, &link);
 495                data = PHY_100BTX_FD_CAPABLE |
 496                       PHY_100BTX_CAPABLE |
 497                       PHY_10BT_FD_CAPABLE |
 498                       PHY_10BT_CAPABLE |
 499                       PHY_AUTO_NEG_CAPABLE;
 500                if (link & PORT_AUTO_NEG_COMPLETE)
 501                        data |= PHY_AUTO_NEG_ACKNOWLEDGE;
 502                if (link & PORT_STAT_LINK_GOOD)
 503                        data |= PHY_LINK_STATUS;
 504                break;
 505        case PHY_REG_ID_1:
 506                data = KSZ8795_ID_HI;
 507                break;
 508        case PHY_REG_ID_2:
 509                data = KSZ8795_ID_LO;
 510                break;
 511        case PHY_REG_AUTO_NEGOTIATION:
 512                ksz_pread8(dev, p, P_LOCAL_CTRL, &ctrl);
 513                data = PHY_AUTO_NEG_802_3;
 514                if (ctrl & PORT_AUTO_NEG_SYM_PAUSE)
 515                        data |= PHY_AUTO_NEG_SYM_PAUSE;
 516                if (ctrl & PORT_AUTO_NEG_100BTX_FD)
 517                        data |= PHY_AUTO_NEG_100BTX_FD;
 518                if (ctrl & PORT_AUTO_NEG_100BTX)
 519                        data |= PHY_AUTO_NEG_100BTX;
 520                if (ctrl & PORT_AUTO_NEG_10BT_FD)
 521                        data |= PHY_AUTO_NEG_10BT_FD;
 522                if (ctrl & PORT_AUTO_NEG_10BT)
 523                        data |= PHY_AUTO_NEG_10BT;
 524                break;
 525        case PHY_REG_REMOTE_CAPABILITY:
 526                ksz_pread8(dev, p, P_REMOTE_STATUS, &link);
 527                data = PHY_AUTO_NEG_802_3;
 528                if (link & PORT_REMOTE_SYM_PAUSE)
 529                        data |= PHY_AUTO_NEG_SYM_PAUSE;
 530                if (link & PORT_REMOTE_100BTX_FD)
 531                        data |= PHY_AUTO_NEG_100BTX_FD;
 532                if (link & PORT_REMOTE_100BTX)
 533                        data |= PHY_AUTO_NEG_100BTX;
 534                if (link & PORT_REMOTE_10BT_FD)
 535                        data |= PHY_AUTO_NEG_10BT_FD;
 536                if (link & PORT_REMOTE_10BT)
 537                        data |= PHY_AUTO_NEG_10BT;
 538                if (data & ~PHY_AUTO_NEG_802_3)
 539                        data |= PHY_REMOTE_ACKNOWLEDGE_NOT;
 540                break;
 541        default:
 542                processed = false;
 543                break;
 544        }
 545        if (processed)
 546                *val = data;
 547}
 548
 549static void ksz8795_w_phy(struct ksz_device *dev, u16 phy, u16 reg, u16 val)
 550{
 551        u8 p = phy;
 552        u8 restart, speed, ctrl, data;
 553
 554        switch (reg) {
 555        case PHY_REG_CTRL:
 556
 557                /* Do not support PHY reset function. */
 558                if (val & PHY_RESET)
 559                        break;
 560                ksz_pread8(dev, p, P_SPEED_STATUS, &speed);
 561                data = speed;
 562                if (val & PHY_HP_MDIX)
 563                        data |= PORT_HP_MDIX;
 564                else
 565                        data &= ~PORT_HP_MDIX;
 566                if (data != speed)
 567                        ksz_pwrite8(dev, p, P_SPEED_STATUS, data);
 568                ksz_pread8(dev, p, P_FORCE_CTRL, &ctrl);
 569                data = ctrl;
 570                if (!(val & PHY_AUTO_NEG_ENABLE))
 571                        data |= PORT_AUTO_NEG_DISABLE;
 572                else
 573                        data &= ~PORT_AUTO_NEG_DISABLE;
 574
 575                /* Fiber port does not support auto-negotiation. */
 576                if (dev->ports[p].fiber)
 577                        data |= PORT_AUTO_NEG_DISABLE;
 578                if (val & PHY_SPEED_100MBIT)
 579                        data |= PORT_FORCE_100_MBIT;
 580                else
 581                        data &= ~PORT_FORCE_100_MBIT;
 582                if (val & PHY_FULL_DUPLEX)
 583                        data |= PORT_FORCE_FULL_DUPLEX;
 584                else
 585                        data &= ~PORT_FORCE_FULL_DUPLEX;
 586                if (data != ctrl)
 587                        ksz_pwrite8(dev, p, P_FORCE_CTRL, data);
 588                ksz_pread8(dev, p, P_NEG_RESTART_CTRL, &restart);
 589                data = restart;
 590                if (val & PHY_LED_DISABLE)
 591                        data |= PORT_LED_OFF;
 592                else
 593                        data &= ~PORT_LED_OFF;
 594                if (val & PHY_TRANSMIT_DISABLE)
 595                        data |= PORT_TX_DISABLE;
 596                else
 597                        data &= ~PORT_TX_DISABLE;
 598                if (val & PHY_AUTO_NEG_RESTART)
 599                        data |= PORT_AUTO_NEG_RESTART;
 600                else
 601                        data &= ~(PORT_AUTO_NEG_RESTART);
 602                if (val & PHY_POWER_DOWN)
 603                        data |= PORT_POWER_DOWN;
 604                else
 605                        data &= ~PORT_POWER_DOWN;
 606                if (val & PHY_AUTO_MDIX_DISABLE)
 607                        data |= PORT_AUTO_MDIX_DISABLE;
 608                else
 609                        data &= ~PORT_AUTO_MDIX_DISABLE;
 610                if (val & PHY_FORCE_MDIX)
 611                        data |= PORT_FORCE_MDIX;
 612                else
 613                        data &= ~PORT_FORCE_MDIX;
 614                if (val & PHY_LOOPBACK)
 615                        data |= PORT_PHY_LOOPBACK;
 616                else
 617                        data &= ~PORT_PHY_LOOPBACK;
 618                if (data != restart)
 619                        ksz_pwrite8(dev, p, P_NEG_RESTART_CTRL, data);
 620                break;
 621        case PHY_REG_AUTO_NEGOTIATION:
 622                ksz_pread8(dev, p, P_LOCAL_CTRL, &ctrl);
 623                data = ctrl;
 624                data &= ~(PORT_AUTO_NEG_SYM_PAUSE |
 625                          PORT_AUTO_NEG_100BTX_FD |
 626                          PORT_AUTO_NEG_100BTX |
 627                          PORT_AUTO_NEG_10BT_FD |
 628                          PORT_AUTO_NEG_10BT);
 629                if (val & PHY_AUTO_NEG_SYM_PAUSE)
 630                        data |= PORT_AUTO_NEG_SYM_PAUSE;
 631                if (val & PHY_AUTO_NEG_100BTX_FD)
 632                        data |= PORT_AUTO_NEG_100BTX_FD;
 633                if (val & PHY_AUTO_NEG_100BTX)
 634                        data |= PORT_AUTO_NEG_100BTX;
 635                if (val & PHY_AUTO_NEG_10BT_FD)
 636                        data |= PORT_AUTO_NEG_10BT_FD;
 637                if (val & PHY_AUTO_NEG_10BT)
 638                        data |= PORT_AUTO_NEG_10BT;
 639                if (data != ctrl)
 640                        ksz_pwrite8(dev, p, P_LOCAL_CTRL, data);
 641                break;
 642        default:
 643                break;
 644        }
 645}
 646
 647static enum dsa_tag_protocol ksz8795_get_tag_protocol(struct dsa_switch *ds,
 648                                                      int port,
 649                                                      enum dsa_tag_protocol mp)
 650{
 651        return DSA_TAG_PROTO_KSZ8795;
 652}
 653
 654static void ksz8795_get_strings(struct dsa_switch *ds, int port,
 655                                u32 stringset, uint8_t *buf)
 656{
 657        struct ksz_device *dev = ds->priv;
 658        int i;
 659
 660        for (i = 0; i < dev->mib_cnt; i++) {
 661                memcpy(buf + i * ETH_GSTRING_LEN, mib_names[i].string,
 662                       ETH_GSTRING_LEN);
 663        }
 664}
 665
 666static void ksz8795_cfg_port_member(struct ksz_device *dev, int port,
 667                                    u8 member)
 668{
 669        u8 data;
 670
 671        ksz_pread8(dev, port, P_MIRROR_CTRL, &data);
 672        data &= ~PORT_VLAN_MEMBERSHIP;
 673        data |= (member & dev->port_mask);
 674        ksz_pwrite8(dev, port, P_MIRROR_CTRL, data);
 675        dev->ports[port].member = member;
 676}
 677
 678static void ksz8795_port_stp_state_set(struct dsa_switch *ds, int port,
 679                                       u8 state)
 680{
 681        struct ksz_device *dev = ds->priv;
 682        int forward = dev->member;
 683        struct ksz_port *p;
 684        int member = -1;
 685        u8 data;
 686
 687        p = &dev->ports[port];
 688
 689        ksz_pread8(dev, port, P_STP_CTRL, &data);
 690        data &= ~(PORT_TX_ENABLE | PORT_RX_ENABLE | PORT_LEARN_DISABLE);
 691
 692        switch (state) {
 693        case BR_STATE_DISABLED:
 694                data |= PORT_LEARN_DISABLE;
 695                if (port < dev->phy_port_cnt)
 696                        member = 0;
 697                break;
 698        case BR_STATE_LISTENING:
 699                data |= (PORT_RX_ENABLE | PORT_LEARN_DISABLE);
 700                if (port < dev->phy_port_cnt &&
 701                    p->stp_state == BR_STATE_DISABLED)
 702                        member = dev->host_mask | p->vid_member;
 703                break;
 704        case BR_STATE_LEARNING:
 705                data |= PORT_RX_ENABLE;
 706                break;
 707        case BR_STATE_FORWARDING:
 708                data |= (PORT_TX_ENABLE | PORT_RX_ENABLE);
 709
 710                /* This function is also used internally. */
 711                if (port == dev->cpu_port)
 712                        break;
 713
 714                /* Port is a member of a bridge. */
 715                if (dev->br_member & BIT(port)) {
 716                        dev->member |= BIT(port);
 717                        member = dev->member;
 718                } else {
 719                        member = dev->host_mask | p->vid_member;
 720                }
 721                break;
 722        case BR_STATE_BLOCKING:
 723                data |= PORT_LEARN_DISABLE;
 724                if (port < dev->phy_port_cnt &&
 725                    p->stp_state == BR_STATE_DISABLED)
 726                        member = dev->host_mask | p->vid_member;
 727                break;
 728        default:
 729                dev_err(ds->dev, "invalid STP state: %d\n", state);
 730                return;
 731        }
 732
 733        ksz_pwrite8(dev, port, P_STP_CTRL, data);
 734        p->stp_state = state;
 735        /* Port membership may share register with STP state. */
 736        if (member >= 0 && member != p->member)
 737                ksz8795_cfg_port_member(dev, port, (u8)member);
 738
 739        /* Check if forwarding needs to be updated. */
 740        if (state != BR_STATE_FORWARDING) {
 741                if (dev->br_member & BIT(port))
 742                        dev->member &= ~BIT(port);
 743        }
 744
 745        /* When topology has changed the function ksz_update_port_member
 746         * should be called to modify port forwarding behavior.
 747         */
 748        if (forward != dev->member)
 749                ksz_update_port_member(dev, port);
 750}
 751
 752static void ksz8795_flush_dyn_mac_table(struct ksz_device *dev, int port)
 753{
 754        u8 learn[DSA_MAX_PORTS];
 755        int first, index, cnt;
 756        struct ksz_port *p;
 757
 758        if ((uint)port < dev->port_cnt) {
 759                first = port;
 760                cnt = port + 1;
 761        } else {
 762                /* Flush all ports. */
 763                first = 0;
 764                cnt = dev->port_cnt;
 765        }
 766        for (index = first; index < cnt; index++) {
 767                p = &dev->ports[index];
 768                if (!p->on)
 769                        continue;
 770                ksz_pread8(dev, index, P_STP_CTRL, &learn[index]);
 771                if (!(learn[index] & PORT_LEARN_DISABLE))
 772                        ksz_pwrite8(dev, index, P_STP_CTRL,
 773                                    learn[index] | PORT_LEARN_DISABLE);
 774        }
 775        ksz_cfg(dev, S_FLUSH_TABLE_CTRL, SW_FLUSH_DYN_MAC_TABLE, true);
 776        for (index = first; index < cnt; index++) {
 777                p = &dev->ports[index];
 778                if (!p->on)
 779                        continue;
 780                if (!(learn[index] & PORT_LEARN_DISABLE))
 781                        ksz_pwrite8(dev, index, P_STP_CTRL, learn[index]);
 782        }
 783}
 784
 785static int ksz8795_port_vlan_filtering(struct dsa_switch *ds, int port,
 786                                       bool flag,
 787                                       struct netlink_ext_ack *extack)
 788{
 789        struct ksz_device *dev = ds->priv;
 790
 791        ksz_cfg(dev, S_MIRROR_CTRL, SW_VLAN_ENABLE, flag);
 792
 793        return 0;
 794}
 795
 796static int ksz8795_port_vlan_add(struct dsa_switch *ds, int port,
 797                                 const struct switchdev_obj_port_vlan *vlan,
 798                                 struct netlink_ext_ack *extack)
 799{
 800        bool untagged = vlan->flags & BRIDGE_VLAN_INFO_UNTAGGED;
 801        struct ksz_device *dev = ds->priv;
 802        u16 data, new_pvid = 0;
 803        u8 fid, member, valid;
 804
 805        ksz_port_cfg(dev, port, P_TAG_CTRL, PORT_REMOVE_TAG, untagged);
 806
 807        ksz8795_r_vlan_table(dev, vlan->vid, &data);
 808        ksz8795_from_vlan(data, &fid, &member, &valid);
 809
 810        /* First time to setup the VLAN entry. */
 811        if (!valid) {
 812                /* Need to find a way to map VID to FID. */
 813                fid = 1;
 814                valid = 1;
 815        }
 816        member |= BIT(port);
 817
 818        ksz8795_to_vlan(fid, member, valid, &data);
 819        ksz8795_w_vlan_table(dev, vlan->vid, data);
 820
 821        /* change PVID */
 822        if (vlan->flags & BRIDGE_VLAN_INFO_PVID)
 823                new_pvid = vlan->vid;
 824
 825        if (new_pvid) {
 826                u16 vid;
 827
 828                ksz_pread16(dev, port, REG_PORT_CTRL_VID, &vid);
 829                vid &= 0xfff;
 830                vid |= new_pvid;
 831                ksz_pwrite16(dev, port, REG_PORT_CTRL_VID, vid);
 832        }
 833
 834        return 0;
 835}
 836
 837static int ksz8795_port_vlan_del(struct dsa_switch *ds, int port,
 838                                 const struct switchdev_obj_port_vlan *vlan)
 839{
 840        bool untagged = vlan->flags & BRIDGE_VLAN_INFO_UNTAGGED;
 841        struct ksz_device *dev = ds->priv;
 842        u16 data, pvid, new_pvid = 0;
 843        u8 fid, member, valid;
 844
 845        ksz_pread16(dev, port, REG_PORT_CTRL_VID, &pvid);
 846        pvid = pvid & 0xFFF;
 847
 848        ksz_port_cfg(dev, port, P_TAG_CTRL, PORT_REMOVE_TAG, untagged);
 849
 850        ksz8795_r_vlan_table(dev, vlan->vid, &data);
 851        ksz8795_from_vlan(data, &fid, &member, &valid);
 852
 853        member &= ~BIT(port);
 854
 855        /* Invalidate the entry if no more member. */
 856        if (!member) {
 857                fid = 0;
 858                valid = 0;
 859        }
 860
 861        if (pvid == vlan->vid)
 862                new_pvid = 1;
 863
 864        ksz8795_to_vlan(fid, member, valid, &data);
 865        ksz8795_w_vlan_table(dev, vlan->vid, data);
 866
 867        if (new_pvid != pvid)
 868                ksz_pwrite16(dev, port, REG_PORT_CTRL_VID, pvid);
 869
 870        return 0;
 871}
 872
 873static int ksz8795_port_mirror_add(struct dsa_switch *ds, int port,
 874                                   struct dsa_mall_mirror_tc_entry *mirror,
 875                                   bool ingress)
 876{
 877        struct ksz_device *dev = ds->priv;
 878
 879        if (ingress) {
 880                ksz_port_cfg(dev, port, P_MIRROR_CTRL, PORT_MIRROR_RX, true);
 881                dev->mirror_rx |= BIT(port);
 882        } else {
 883                ksz_port_cfg(dev, port, P_MIRROR_CTRL, PORT_MIRROR_TX, true);
 884                dev->mirror_tx |= BIT(port);
 885        }
 886
 887        ksz_port_cfg(dev, port, P_MIRROR_CTRL, PORT_MIRROR_SNIFFER, false);
 888
 889        /* configure mirror port */
 890        if (dev->mirror_rx || dev->mirror_tx)
 891                ksz_port_cfg(dev, mirror->to_local_port, P_MIRROR_CTRL,
 892                             PORT_MIRROR_SNIFFER, true);
 893
 894        return 0;
 895}
 896
 897static void ksz8795_port_mirror_del(struct dsa_switch *ds, int port,
 898                                    struct dsa_mall_mirror_tc_entry *mirror)
 899{
 900        struct ksz_device *dev = ds->priv;
 901        u8 data;
 902
 903        if (mirror->ingress) {
 904                ksz_port_cfg(dev, port, P_MIRROR_CTRL, PORT_MIRROR_RX, false);
 905                dev->mirror_rx &= ~BIT(port);
 906        } else {
 907                ksz_port_cfg(dev, port, P_MIRROR_CTRL, PORT_MIRROR_TX, false);
 908                dev->mirror_tx &= ~BIT(port);
 909        }
 910
 911        ksz_pread8(dev, port, P_MIRROR_CTRL, &data);
 912
 913        if (!dev->mirror_rx && !dev->mirror_tx)
 914                ksz_port_cfg(dev, mirror->to_local_port, P_MIRROR_CTRL,
 915                             PORT_MIRROR_SNIFFER, false);
 916}
 917
 918static void ksz8795_port_setup(struct ksz_device *dev, int port, bool cpu_port)
 919{
 920        struct ksz_port *p = &dev->ports[port];
 921        u8 data8, member;
 922
 923        /* enable broadcast storm limit */
 924        ksz_port_cfg(dev, port, P_BCAST_STORM_CTRL, PORT_BROADCAST_STORM, true);
 925
 926        ksz8795_set_prio_queue(dev, port, 4);
 927
 928        /* disable DiffServ priority */
 929        ksz_port_cfg(dev, port, P_PRIO_CTRL, PORT_DIFFSERV_ENABLE, false);
 930
 931        /* replace priority */
 932        ksz_port_cfg(dev, port, P_802_1P_CTRL, PORT_802_1P_REMAPPING, false);
 933
 934        /* enable 802.1p priority */
 935        ksz_port_cfg(dev, port, P_PRIO_CTRL, PORT_802_1P_ENABLE, true);
 936
 937        if (cpu_port) {
 938                if (!p->interface && dev->compat_interface) {
 939                        dev_warn(dev->dev,
 940                                 "Using legacy switch \"phy-mode\" property, because it is missing on port %d node. "
 941                                 "Please update your device tree.\n",
 942                                 port);
 943                        p->interface = dev->compat_interface;
 944                }
 945
 946                /* Configure MII interface for proper network communication. */
 947                ksz_read8(dev, REG_PORT_5_CTRL_6, &data8);
 948                data8 &= ~PORT_INTERFACE_TYPE;
 949                data8 &= ~PORT_GMII_1GPS_MODE;
 950                switch (p->interface) {
 951                case PHY_INTERFACE_MODE_MII:
 952                        p->phydev.speed = SPEED_100;
 953                        break;
 954                case PHY_INTERFACE_MODE_RMII:
 955                        data8 |= PORT_INTERFACE_RMII;
 956                        p->phydev.speed = SPEED_100;
 957                        break;
 958                case PHY_INTERFACE_MODE_GMII:
 959                        data8 |= PORT_GMII_1GPS_MODE;
 960                        data8 |= PORT_INTERFACE_GMII;
 961                        p->phydev.speed = SPEED_1000;
 962                        break;
 963                default:
 964                        data8 &= ~PORT_RGMII_ID_IN_ENABLE;
 965                        data8 &= ~PORT_RGMII_ID_OUT_ENABLE;
 966                        if (p->interface == PHY_INTERFACE_MODE_RGMII_ID ||
 967                            p->interface == PHY_INTERFACE_MODE_RGMII_RXID)
 968                                data8 |= PORT_RGMII_ID_IN_ENABLE;
 969                        if (p->interface == PHY_INTERFACE_MODE_RGMII_ID ||
 970                            p->interface == PHY_INTERFACE_MODE_RGMII_TXID)
 971                                data8 |= PORT_RGMII_ID_OUT_ENABLE;
 972                        data8 |= PORT_GMII_1GPS_MODE;
 973                        data8 |= PORT_INTERFACE_RGMII;
 974                        p->phydev.speed = SPEED_1000;
 975                        break;
 976                }
 977                ksz_write8(dev, REG_PORT_5_CTRL_6, data8);
 978                p->phydev.duplex = 1;
 979
 980                member = dev->port_mask;
 981        } else {
 982                member = dev->host_mask | p->vid_member;
 983        }
 984        ksz8795_cfg_port_member(dev, port, member);
 985}
 986
 987static void ksz8795_config_cpu_port(struct dsa_switch *ds)
 988{
 989        struct ksz_device *dev = ds->priv;
 990        struct ksz_port *p;
 991        u8 remote;
 992        int i;
 993
 994        /* Switch marks the maximum frame with extra byte as oversize. */
 995        ksz_cfg(dev, REG_SW_CTRL_2, SW_LEGAL_PACKET_DISABLE, true);
 996        ksz_cfg(dev, S_TAIL_TAG_CTRL, SW_TAIL_TAG_ENABLE, true);
 997
 998        p = &dev->ports[dev->cpu_port];
 999        p->vid_member = dev->port_mask;
1000        p->on = 1;
1001
1002        ksz8795_port_setup(dev, dev->cpu_port, true);
1003        dev->member = dev->host_mask;
1004
1005        for (i = 0; i < dev->phy_port_cnt; i++) {
1006                p = &dev->ports[i];
1007
1008                /* Initialize to non-zero so that ksz_cfg_port_member() will
1009                 * be called.
1010                 */
1011                p->vid_member = BIT(i);
1012                p->member = dev->port_mask;
1013                ksz8795_port_stp_state_set(ds, i, BR_STATE_DISABLED);
1014
1015                /* Last port may be disabled. */
1016                if (i == dev->phy_port_cnt)
1017                        break;
1018                p->on = 1;
1019                p->phy = 1;
1020        }
1021        for (i = 0; i < dev->phy_port_cnt; i++) {
1022                p = &dev->ports[i];
1023                if (!p->on)
1024                        continue;
1025                ksz_pread8(dev, i, P_REMOTE_STATUS, &remote);
1026                if (remote & PORT_FIBER_MODE)
1027                        p->fiber = 1;
1028                if (p->fiber)
1029                        ksz_port_cfg(dev, i, P_STP_CTRL, PORT_FORCE_FLOW_CTRL,
1030                                     true);
1031                else
1032                        ksz_port_cfg(dev, i, P_STP_CTRL, PORT_FORCE_FLOW_CTRL,
1033                                     false);
1034        }
1035}
1036
1037static int ksz8795_setup(struct dsa_switch *ds)
1038{
1039        struct ksz_device *dev = ds->priv;
1040        struct alu_struct alu;
1041        int i, ret = 0;
1042
1043        dev->vlan_cache = devm_kcalloc(dev->dev, sizeof(struct vlan_table),
1044                                       dev->num_vlans, GFP_KERNEL);
1045        if (!dev->vlan_cache)
1046                return -ENOMEM;
1047
1048        ret = ksz8795_reset_switch(dev);
1049        if (ret) {
1050                dev_err(ds->dev, "failed to reset switch\n");
1051                return ret;
1052        }
1053
1054        ksz_cfg(dev, S_REPLACE_VID_CTRL, SW_FLOW_CTRL, true);
1055
1056        /* Enable automatic fast aging when link changed detected. */
1057        ksz_cfg(dev, S_LINK_AGING_CTRL, SW_LINK_AUTO_AGING, true);
1058
1059        /* Enable aggressive back off algorithm in half duplex mode. */
1060        regmap_update_bits(dev->regmap[0], REG_SW_CTRL_1,
1061                           SW_AGGR_BACKOFF, SW_AGGR_BACKOFF);
1062
1063        /*
1064         * Make sure unicast VLAN boundary is set as default and
1065         * enable no excessive collision drop.
1066         */
1067        regmap_update_bits(dev->regmap[0], REG_SW_CTRL_2,
1068                           UNICAST_VLAN_BOUNDARY | NO_EXC_COLLISION_DROP,
1069                           UNICAST_VLAN_BOUNDARY | NO_EXC_COLLISION_DROP);
1070
1071        ksz8795_config_cpu_port(ds);
1072
1073        ksz_cfg(dev, REG_SW_CTRL_2, MULTICAST_STORM_DISABLE, true);
1074
1075        ksz_cfg(dev, S_REPLACE_VID_CTRL, SW_REPLACE_VID, false);
1076
1077        ksz_cfg(dev, S_MIRROR_CTRL, SW_MIRROR_RX_TX, false);
1078
1079        /* set broadcast storm protection 10% rate */
1080        regmap_update_bits(dev->regmap[1], S_REPLACE_VID_CTRL,
1081                           BROADCAST_STORM_RATE,
1082                           (BROADCAST_STORM_VALUE *
1083                           BROADCAST_STORM_PROT_RATE) / 100);
1084
1085        for (i = 0; i < (dev->num_vlans / 4); i++)
1086                ksz8795_r_vlan_entries(dev, i);
1087
1088        /* Setup STP address for STP operation. */
1089        memset(&alu, 0, sizeof(alu));
1090        ether_addr_copy(alu.mac, eth_stp_addr);
1091        alu.is_static = true;
1092        alu.is_override = true;
1093        alu.port_forward = dev->host_mask;
1094
1095        ksz8795_w_sta_mac_table(dev, 0, &alu);
1096
1097        ksz_init_mib_timer(dev);
1098
1099        ds->configure_vlan_while_not_filtering = false;
1100
1101        return 0;
1102}
1103
1104static const struct dsa_switch_ops ksz8795_switch_ops = {
1105        .get_tag_protocol       = ksz8795_get_tag_protocol,
1106        .setup                  = ksz8795_setup,
1107        .phy_read               = ksz_phy_read16,
1108        .phy_write              = ksz_phy_write16,
1109        .phylink_mac_link_down  = ksz_mac_link_down,
1110        .port_enable            = ksz_enable_port,
1111        .get_strings            = ksz8795_get_strings,
1112        .get_ethtool_stats      = ksz_get_ethtool_stats,
1113        .get_sset_count         = ksz_sset_count,
1114        .port_bridge_join       = ksz_port_bridge_join,
1115        .port_bridge_leave      = ksz_port_bridge_leave,
1116        .port_stp_state_set     = ksz8795_port_stp_state_set,
1117        .port_fast_age          = ksz_port_fast_age,
1118        .port_vlan_filtering    = ksz8795_port_vlan_filtering,
1119        .port_vlan_add          = ksz8795_port_vlan_add,
1120        .port_vlan_del          = ksz8795_port_vlan_del,
1121        .port_fdb_dump          = ksz_port_fdb_dump,
1122        .port_mdb_add           = ksz_port_mdb_add,
1123        .port_mdb_del           = ksz_port_mdb_del,
1124        .port_mirror_add        = ksz8795_port_mirror_add,
1125        .port_mirror_del        = ksz8795_port_mirror_del,
1126};
1127
1128static u32 ksz8795_get_port_addr(int port, int offset)
1129{
1130        return PORT_CTRL_ADDR(port, offset);
1131}
1132
1133static int ksz8795_switch_detect(struct ksz_device *dev)
1134{
1135        u8 id1, id2;
1136        u16 id16;
1137        int ret;
1138
1139        /* read chip id */
1140        ret = ksz_read16(dev, REG_CHIP_ID0, &id16);
1141        if (ret)
1142                return ret;
1143
1144        id1 = id16 >> 8;
1145        id2 = id16 & SW_CHIP_ID_M;
1146        if (id1 != FAMILY_ID ||
1147            (id2 != CHIP_ID_94 && id2 != CHIP_ID_95))
1148                return -ENODEV;
1149
1150        if (id2 == CHIP_ID_95) {
1151                u8 val;
1152
1153                id2 = 0x95;
1154                ksz_read8(dev, REG_PORT_1_STATUS_0, &val);
1155                if (val & PORT_FIBER_MODE)
1156                        id2 = 0x65;
1157        } else if (id2 == CHIP_ID_94) {
1158                id2 = 0x94;
1159        }
1160        id16 &= ~0xff;
1161        id16 |= id2;
1162        dev->chip_id = id16;
1163
1164        return 0;
1165}
1166
1167struct ksz_chip_data {
1168        u16 chip_id;
1169        const char *dev_name;
1170        int num_vlans;
1171        int num_alus;
1172        int num_statics;
1173        int cpu_ports;
1174        int port_cnt;
1175};
1176
1177static const struct ksz_chip_data ksz8795_switch_chips[] = {
1178        {
1179                .chip_id = 0x8795,
1180                .dev_name = "KSZ8795",
1181                .num_vlans = 4096,
1182                .num_alus = 0,
1183                .num_statics = 8,
1184                .cpu_ports = 0x10,      /* can be configured as cpu port */
1185                .port_cnt = 5,          /* total cpu and user ports */
1186        },
1187        {
1188                /*
1189                 * WARNING
1190                 * =======
1191                 * KSZ8794 is similar to KSZ8795, except the port map
1192                 * contains a gap between external and CPU ports, the
1193                 * port map is NOT continuous. The per-port register
1194                 * map is shifted accordingly too, i.e. registers at
1195                 * offset 0x40 are NOT used on KSZ8794 and they ARE
1196                 * used on KSZ8795 for external port 3.
1197                 *           external  cpu
1198                 * KSZ8794   0,1,2      4
1199                 * KSZ8795   0,1,2,3    4
1200                 * KSZ8765   0,1,2,3    4
1201                 */
1202                .chip_id = 0x8794,
1203                .dev_name = "KSZ8794",
1204                .num_vlans = 4096,
1205                .num_alus = 0,
1206                .num_statics = 8,
1207                .cpu_ports = 0x10,      /* can be configured as cpu port */
1208                .port_cnt = 4,          /* total cpu and user ports */
1209        },
1210        {
1211                .chip_id = 0x8765,
1212                .dev_name = "KSZ8765",
1213                .num_vlans = 4096,
1214                .num_alus = 0,
1215                .num_statics = 8,
1216                .cpu_ports = 0x10,      /* can be configured as cpu port */
1217                .port_cnt = 5,          /* total cpu and user ports */
1218        },
1219};
1220
1221static int ksz8795_switch_init(struct ksz_device *dev)
1222{
1223        int i;
1224
1225        dev->ds->ops = &ksz8795_switch_ops;
1226
1227        for (i = 0; i < ARRAY_SIZE(ksz8795_switch_chips); i++) {
1228                const struct ksz_chip_data *chip = &ksz8795_switch_chips[i];
1229
1230                if (dev->chip_id == chip->chip_id) {
1231                        dev->name = chip->dev_name;
1232                        dev->num_vlans = chip->num_vlans;
1233                        dev->num_alus = chip->num_alus;
1234                        dev->num_statics = chip->num_statics;
1235                        dev->port_cnt = fls(chip->cpu_ports);
1236                        dev->cpu_port = fls(chip->cpu_ports) - 1;
1237                        dev->phy_port_cnt = dev->port_cnt - 1;
1238                        dev->cpu_ports = chip->cpu_ports;
1239                        dev->host_mask = chip->cpu_ports;
1240                        dev->port_mask = (BIT(dev->phy_port_cnt) - 1) |
1241                                         chip->cpu_ports;
1242                        break;
1243                }
1244        }
1245
1246        /* no switch found */
1247        if (!dev->cpu_ports)
1248                return -ENODEV;
1249
1250        dev->reg_mib_cnt = KSZ8795_COUNTER_NUM;
1251        dev->mib_cnt = ARRAY_SIZE(mib_names);
1252
1253        dev->ports = devm_kzalloc(dev->dev,
1254                                  dev->port_cnt * sizeof(struct ksz_port),
1255                                  GFP_KERNEL);
1256        if (!dev->ports)
1257                return -ENOMEM;
1258        for (i = 0; i < dev->port_cnt; i++) {
1259                mutex_init(&dev->ports[i].mib.cnt_mutex);
1260                dev->ports[i].mib.counters =
1261                        devm_kzalloc(dev->dev,
1262                                     sizeof(u64) *
1263                                     (dev->mib_cnt + 1),
1264                                     GFP_KERNEL);
1265                if (!dev->ports[i].mib.counters)
1266                        return -ENOMEM;
1267        }
1268
1269        /* set the real number of ports */
1270        dev->ds->num_ports = dev->port_cnt;
1271
1272        return 0;
1273}
1274
1275static void ksz8795_switch_exit(struct ksz_device *dev)
1276{
1277        ksz8795_reset_switch(dev);
1278}
1279
1280static const struct ksz_dev_ops ksz8795_dev_ops = {
1281        .get_port_addr = ksz8795_get_port_addr,
1282        .cfg_port_member = ksz8795_cfg_port_member,
1283        .flush_dyn_mac_table = ksz8795_flush_dyn_mac_table,
1284        .port_setup = ksz8795_port_setup,
1285        .r_phy = ksz8795_r_phy,
1286        .w_phy = ksz8795_w_phy,
1287        .r_dyn_mac_table = ksz8795_r_dyn_mac_table,
1288        .r_sta_mac_table = ksz8795_r_sta_mac_table,
1289        .w_sta_mac_table = ksz8795_w_sta_mac_table,
1290        .r_mib_cnt = ksz8795_r_mib_cnt,
1291        .r_mib_pkt = ksz8795_r_mib_pkt,
1292        .freeze_mib = ksz8795_freeze_mib,
1293        .port_init_cnt = ksz8795_port_init_cnt,
1294        .shutdown = ksz8795_reset_switch,
1295        .detect = ksz8795_switch_detect,
1296        .init = ksz8795_switch_init,
1297        .exit = ksz8795_switch_exit,
1298};
1299
1300int ksz8795_switch_register(struct ksz_device *dev)
1301{
1302        return ksz_switch_register(dev, &ksz8795_dev_ops);
1303}
1304EXPORT_SYMBOL(ksz8795_switch_register);
1305
1306MODULE_AUTHOR("Tristram Ha <Tristram.Ha@microchip.com>");
1307MODULE_DESCRIPTION("Microchip KSZ8795 Series Switch DSA Driver");
1308MODULE_LICENSE("GPL");
1309