// SPDX-License-Identifier: GPL-2.0 /* * Microchip KSZ8795 switch driver * * Copyright (C) 2017 Microchip Technology Inc. * Tristram Ha */ #include #include #include #include #include #include #include #include #include #include #include #include "ksz_common.h" #include "ksz8795_reg.h" static const struct { char string[ETH_GSTRING_LEN]; } mib_names[TOTAL_SWITCH_COUNTER_NUM] = { { "rx_hi" }, { "rx_undersize" }, { "rx_fragments" }, { "rx_oversize" }, { "rx_jabbers" }, { "rx_symbol_err" }, { "rx_crc_err" }, { "rx_align_err" }, { "rx_mac_ctrl" }, { "rx_pause" }, { "rx_bcast" }, { "rx_mcast" }, { "rx_ucast" }, { "rx_64_or_less" }, { "rx_65_127" }, { "rx_128_255" }, { "rx_256_511" }, { "rx_512_1023" }, { "rx_1024_1522" }, { "rx_1523_2000" }, { "rx_2001" }, { "tx_hi" }, { "tx_late_col" }, { "tx_pause" }, { "tx_bcast" }, { "tx_mcast" }, { "tx_ucast" }, { "tx_deferred" }, { "tx_total_col" }, { "tx_exc_col" }, { "tx_single_col" }, { "tx_mult_col" }, { "rx_total" }, { "tx_total" }, { "rx_discards" }, { "tx_discards" }, }; static void ksz_cfg(struct ksz_device *dev, u32 addr, u8 bits, bool set) { regmap_update_bits(dev->regmap[0], addr, bits, set ? bits : 0); } static void ksz_port_cfg(struct ksz_device *dev, int port, int offset, u8 bits, bool set) { regmap_update_bits(dev->regmap[0], PORT_CTRL_ADDR(port, offset), bits, set ? bits : 0); } static int ksz8795_reset_switch(struct ksz_device *dev) { /* reset switch */ ksz_write8(dev, REG_POWER_MANAGEMENT_1, SW_SOFTWARE_POWER_DOWN << SW_POWER_MANAGEMENT_MODE_S); ksz_write8(dev, REG_POWER_MANAGEMENT_1, 0); return 0; } static void ksz8795_set_prio_queue(struct ksz_device *dev, int port, int queue) { u8 hi, lo; /* Number of queues can only be 1, 2, or 4. */ switch (queue) { case 4: case 3: queue = PORT_QUEUE_SPLIT_4; break; case 2: queue = PORT_QUEUE_SPLIT_2; break; default: queue = PORT_QUEUE_SPLIT_1; } ksz_pread8(dev, port, REG_PORT_CTRL_0, &lo); ksz_pread8(dev, port, P_DROP_TAG_CTRL, &hi); lo &= ~PORT_QUEUE_SPLIT_L; if (queue & PORT_QUEUE_SPLIT_2) lo |= PORT_QUEUE_SPLIT_L; hi &= ~PORT_QUEUE_SPLIT_H; if (queue & PORT_QUEUE_SPLIT_4) hi |= PORT_QUEUE_SPLIT_H; ksz_pwrite8(dev, port, REG_PORT_CTRL_0, lo); ksz_pwrite8(dev, port, P_DROP_TAG_CTRL, hi); /* Default is port based for egress rate limit. */ if (queue != PORT_QUEUE_SPLIT_1) ksz_cfg(dev, REG_SW_CTRL_19, SW_OUT_RATE_LIMIT_QUEUE_BASED, true); } static void ksz8795_r_mib_cnt(struct ksz_device *dev, int port, u16 addr, u64 *cnt) { u16 ctrl_addr; u32 data; u8 check; int loop; ctrl_addr = addr + SWITCH_COUNTER_NUM * port; ctrl_addr |= IND_ACC_TABLE(TABLE_MIB | TABLE_READ); mutex_lock(&dev->alu_mutex); ksz_write16(dev, REG_IND_CTRL_0, ctrl_addr); /* It is almost guaranteed to always read the valid bit because of * slow SPI speed. */ for (loop = 2; loop > 0; loop--) { ksz_read8(dev, REG_IND_MIB_CHECK, &check); if (check & MIB_COUNTER_VALID) { ksz_read32(dev, REG_IND_DATA_LO, &data); if (check & MIB_COUNTER_OVERFLOW) *cnt += MIB_COUNTER_VALUE + 1; *cnt += data & MIB_COUNTER_VALUE; break; } } mutex_unlock(&dev->alu_mutex); } static void ksz8795_r_mib_pkt(struct ksz_device *dev, int port, u16 addr, u64 *dropped, u64 *cnt) { u16 ctrl_addr; u32 data; u8 check; int loop; addr -= SWITCH_COUNTER_NUM; ctrl_addr = (KS_MIB_TOTAL_RX_1 - KS_MIB_TOTAL_RX_0) * port; ctrl_addr += addr + KS_MIB_TOTAL_RX_0; ctrl_addr |= IND_ACC_TABLE(TABLE_MIB | TABLE_READ); mutex_lock(&dev->alu_mutex); ksz_write16(dev, REG_IND_CTRL_0, ctrl_addr); /* It is almost guaranteed to always read the valid bit because of * slow SPI speed. */ for (loop = 2; loop > 0; loop--) { ksz_read8(dev, REG_IND_MIB_CHECK, &check); if (check & MIB_COUNTER_VALID) { ksz_read32(dev, REG_IND_DATA_LO, &data); if (addr < 2) { u64 total; total = check & MIB_TOTAL_BYTES_H; total <<= 32; *cnt += total; *cnt += data; if (check & MIB_COUNTER_OVERFLOW) { total = MIB_TOTAL_BYTES_H + 1; total <<= 32; *cnt += total; } } else { if (check & MIB_COUNTER_OVERFLOW) *cnt += MIB_PACKET_DROPPED + 1; *cnt += data & MIB_PACKET_DROPPED; } break; } } mutex_unlock(&dev->alu_mutex); } static void ksz8795_freeze_mib(struct ksz_device *dev, int port, bool freeze) { /* enable the port for flush/freeze function */ if (freeze) ksz_cfg(dev, REG_SW_CTRL_6, BIT(port), true); ksz_cfg(dev, REG_SW_CTRL_6, SW_MIB_COUNTER_FREEZE, freeze); /* disable the port after freeze is done */ if (!freeze) ksz_cfg(dev, REG_SW_CTRL_6, BIT(port), false); } static void ksz8795_port_init_cnt(struct ksz_device *dev, int port) { struct ksz_port_mib *mib = &dev->ports[port].mib; /* flush all enabled port MIB counters */ ksz_cfg(dev, REG_SW_CTRL_6, BIT(port), true); ksz_cfg(dev, REG_SW_CTRL_6, SW_MIB_COUNTER_FLUSH, true); ksz_cfg(dev, REG_SW_CTRL_6, BIT(port), false); mib->cnt_ptr = 0; /* Some ports may not have MIB counters before SWITCH_COUNTER_NUM. */ while (mib->cnt_ptr < dev->reg_mib_cnt) { dev->dev_ops->r_mib_cnt(dev, port, mib->cnt_ptr, &mib->counters[mib->cnt_ptr]); ++mib->cnt_ptr; } /* Some ports may not have MIB counters after SWITCH_COUNTER_NUM. */ while (mib->cnt_ptr < dev->mib_cnt) { dev->dev_ops->r_mib_pkt(dev, port, mib->cnt_ptr, NULL, &mib->counters[mib->cnt_ptr]); ++mib->cnt_ptr; } mib->cnt_ptr = 0; memset(mib->counters, 0, dev->mib_cnt * sizeof(u64)); } static void ksz8795_r_table(struct ksz_device *dev, int table, u16 addr, u64 *data) { u16 ctrl_addr; ctrl_addr = IND_ACC_TABLE(table | TABLE_READ) | addr; mutex_lock(&dev->alu_mutex); ksz_write16(dev, REG_IND_CTRL_0, ctrl_addr); ksz_read64(dev, REG_IND_DATA_HI, data); mutex_unlock(&dev->alu_mutex); } static void ksz8795_w_table(struct ksz_device *dev, int table, u16 addr, u64 data) { u16 ctrl_addr; ctrl_addr = IND_ACC_TABLE(table) | addr; mutex_lock(&dev->alu_mutex); ksz_write64(dev, REG_IND_DATA_HI, data); ksz_write16(dev, REG_IND_CTRL_0, ctrl_addr); mutex_unlock(&dev->alu_mutex); } static int ksz8795_valid_dyn_entry(struct ksz_device *dev, u8 *data) { int timeout = 100; do { ksz_read8(dev, REG_IND_DATA_CHECK, data); timeout--; } while ((*data & DYNAMIC_MAC_TABLE_NOT_READY) && timeout); /* Entry is not ready for accessing. */ if (*data & DYNAMIC_MAC_TABLE_NOT_READY) { return -EAGAIN; /* Entry is ready for accessing. */ } else { ksz_read8(dev, REG_IND_DATA_8, data); /* There is no valid entry in the table. */ if (*data & DYNAMIC_MAC_TABLE_MAC_EMPTY) return -ENXIO; } return 0; } static int ksz8795_r_dyn_mac_table(struct ksz_device *dev, u16 addr, u8 *mac_addr, u8 *fid, u8 *src_port, u8 *timestamp, u16 *entries) { u32 data_hi, data_lo; u16 ctrl_addr; u8 data; int rc; ctrl_addr = IND_ACC_TABLE(TABLE_DYNAMIC_MAC | TABLE_READ) | addr; mutex_lock(&dev->alu_mutex); ksz_write16(dev, REG_IND_CTRL_0, ctrl_addr); rc = ksz8795_valid_dyn_entry(dev, &data); if (rc == -EAGAIN) { if (addr == 0) *entries = 0; } else if (rc == -ENXIO) { *entries = 0; /* At least one valid entry in the table. */ } else { u64 buf = 0; int cnt; ksz_read64(dev, REG_IND_DATA_HI, &buf); data_hi = (u32)(buf >> 32); data_lo = (u32)buf; /* Check out how many valid entry in the table. */ cnt = data & DYNAMIC_MAC_TABLE_ENTRIES_H; cnt <<= DYNAMIC_MAC_ENTRIES_H_S; cnt |= (data_hi & DYNAMIC_MAC_TABLE_ENTRIES) >> DYNAMIC_MAC_ENTRIES_S; *entries = cnt + 1; *fid = (data_hi & DYNAMIC_MAC_TABLE_FID) >> DYNAMIC_MAC_FID_S; *src_port = (data_hi & DYNAMIC_MAC_TABLE_SRC_PORT) >> DYNAMIC_MAC_SRC_PORT_S; *timestamp = (data_hi & DYNAMIC_MAC_TABLE_TIMESTAMP) >> DYNAMIC_MAC_TIMESTAMP_S; mac_addr[5] = (u8)data_lo; mac_addr[4] = (u8)(data_lo >> 8); mac_addr[3] = (u8)(data_lo >> 16); mac_addr[2] = (u8)(data_lo >> 24); mac_addr[1] = (u8)data_hi; mac_addr[0] = (u8)(data_hi >> 8); rc = 0; } mutex_unlock(&dev->alu_mutex); return rc; } static int ksz8795_r_sta_mac_table(struct ksz_device *dev, u16 addr, struct alu_struct *alu) { u32 data_hi, data_lo; u64 data; ksz8795_r_table(dev, TABLE_STATIC_MAC, addr, &data); data_hi = data >> 32; data_lo = (u32)data; if (data_hi & (STATIC_MAC_TABLE_VALID | STATIC_MAC_TABLE_OVERRIDE)) { alu->mac[5] = (u8)data_lo; alu->mac[4] = (u8)(data_lo >> 8); alu->mac[3] = (u8)(data_lo >> 16); alu->mac[2] = (u8)(data_lo >> 24); alu->mac[1] = (u8)data_hi; alu->mac[0] = (u8)(data_hi >> 8); alu->port_forward = (data_hi & STATIC_MAC_TABLE_FWD_PORTS) >> STATIC_MAC_FWD_PORTS_S; alu->is_override = (data_hi & STATIC_MAC_TABLE_OVERRIDE) ? 1 : 0; data_hi >>= 1; alu->is_use_fid = (data_hi & STATIC_MAC_TABLE_USE_FID) ? 1 : 0; alu->fid = (data_hi & STATIC_MAC_TABLE_FID) >> STATIC_MAC_FID_S; return 0; } return -ENXIO; } static void ksz8795_w_sta_mac_table(struct ksz_device *dev, u16 addr, struct alu_struct *alu) { u32 data_hi, data_lo; u64 data; data_lo = ((u32)alu->mac[2] << 24) | ((u32)alu->mac[3] << 16) | ((u32)alu->mac[4] << 8) | alu->mac[5]; data_hi = ((u32)alu->mac[0] << 8) | alu->mac[1]; data_hi |= (u32)alu->port_forward << STATIC_MAC_FWD_PORTS_S; if (alu->is_override) data_hi |= STATIC_MAC_TABLE_OVERRIDE; if (alu->is_use_fid) { data_hi |= STATIC_MAC_TABLE_USE_FID; data_hi |= (u32)alu->fid << STATIC_MAC_FID_S; } if (alu->is_static) data_hi |= STATIC_MAC_TABLE_VALID; else data_hi &= ~STATIC_MAC_TABLE_OVERRIDE; data = (u64)data_hi << 32 | data_lo; ksz8795_w_table(dev, TABLE_STATIC_MAC, addr, data); } static void ksz8795_from_vlan(u16 vlan, u8 *fid, u8 *member, u8 *valid) { *fid = vlan & VLAN_TABLE_FID; *member = (vlan & VLAN_TABLE_MEMBERSHIP) >> VLAN_TABLE_MEMBERSHIP_S; *valid = !!(vlan & VLAN_TABLE_VALID); } static void ksz8795_to_vlan(u8 fid, u8 member, u8 valid, u16 *vlan) { *vlan = fid; *vlan |= (u16)member << VLAN_TABLE_MEMBERSHIP_S; if (valid) *vlan |= VLAN_TABLE_VALID; } static void ksz8795_r_vlan_entries(struct ksz_device *dev, u16 addr) { u64 data; int i; ksz8795_r_table(dev, TABLE_VLAN, addr, &data); addr *= 4; for (i = 0; i < 4; i++) { dev->vlan_cache[addr + i].table[0] = (u16)data; data >>= VLAN_TABLE_S; } } static void ksz8795_r_vlan_table(struct ksz_device *dev, u16 vid, u16 *vlan) { int index; u16 *data; u16 addr; u64 buf; data = (u16 *)&buf; addr = vid / 4; index = vid & 3; ksz8795_r_table(dev, TABLE_VLAN, addr, &buf); *vlan = data[index]; } static void ksz8795_w_vlan_table(struct ksz_device *dev, u16 vid, u16 vlan) { int index; u16 *data; u16 addr; u64 buf; data = (u16 *)&buf; addr = vid / 4; index = vid & 3; ksz8795_r_table(dev, TABLE_VLAN, addr, &buf); data[index] = vlan; dev->vlan_cache[vid].table[0] = vlan; ksz8795_w_table(dev, TABLE_VLAN, addr, buf); } static void ksz8795_r_phy(struct ksz_device *dev, u16 phy, u16 reg, u16 *val) { u8 restart, speed, ctrl, link; int processed = true; u16 data = 0; u8 p = phy; switch (reg) { case PHY_REG_CTRL: ksz_pread8(dev, p, P_NEG_RESTART_CTRL, &restart); ksz_pread8(dev, p, P_SPEED_STATUS, &speed); ksz_pread8(dev, p, P_FORCE_CTRL, &ctrl); if (restart & PORT_PHY_LOOPBACK) data |= PHY_LOOPBACK; if (ctrl & PORT_FORCE_100_MBIT) data |= PHY_SPEED_100MBIT; if (!(ctrl & PORT_AUTO_NEG_DISABLE)) data |= PHY_AUTO_NEG_ENABLE; if (restart & PORT_POWER_DOWN) data |= PHY_POWER_DOWN; if (restart & PORT_AUTO_NEG_RESTART) data |= PHY_AUTO_NEG_RESTART; if (ctrl & PORT_FORCE_FULL_DUPLEX) data |= PHY_FULL_DUPLEX; if (speed & PORT_HP_MDIX) data |= PHY_HP_MDIX; if (restart & PORT_FORCE_MDIX) data |= PHY_FORCE_MDIX; if (restart & PORT_AUTO_MDIX_DISABLE) data |= PHY_AUTO_MDIX_DISABLE; if (restart & PORT_TX_DISABLE) data |= PHY_TRANSMIT_DISABLE; if (restart & PORT_LED_OFF) data |= PHY_LED_DISABLE; break; case PHY_REG_STATUS: ksz_pread8(dev, p, P_LINK_STATUS, &link); data = PHY_100BTX_FD_CAPABLE | PHY_100BTX_CAPABLE | PHY_10BT_FD_CAPABLE | PHY_10BT_CAPABLE | PHY_AUTO_NEG_CAPABLE; if (link & PORT_AUTO_NEG_COMPLETE) data |= PHY_AUTO_NEG_ACKNOWLEDGE; if (link & PORT_STAT_LINK_GOOD) data |= PHY_LINK_STATUS; break; case PHY_REG_ID_1: data = KSZ8795_ID_HI; break; case PHY_REG_ID_2: data = KSZ8795_ID_LO; break; case PHY_REG_AUTO_NEGOTIATION: ksz_pread8(dev, p, P_LOCAL_CTRL, &ctrl); data = PHY_AUTO_NEG_802_3; if (ctrl & PORT_AUTO_NEG_SYM_PAUSE) data |= PHY_AUTO_NEG_SYM_PAUSE; if (ctrl & PORT_AUTO_NEG_100BTX_FD) data |= PHY_AUTO_NEG_100BTX_FD; if (ctrl & PORT_AUTO_NEG_100BTX) data |= PHY_AUTO_NEG_100BTX; if (ctrl & PORT_AUTO_NEG_10BT_FD) data |= PHY_AUTO_NEG_10BT_FD; if (ctrl & PORT_AUTO_NEG_10BT) data |= PHY_AUTO_NEG_10BT; break; case PHY_REG_REMOTE_CAPABILITY: ksz_pread8(dev, p, P_REMOTE_STATUS, &link); data = PHY_AUTO_NEG_802_3; if (link & PORT_REMOTE_SYM_PAUSE) data |= PHY_AUTO_NEG_SYM_PAUSE; if (link & PORT_REMOTE_100BTX_FD) data |= PHY_AUTO_NEG_100BTX_FD; if (link & PORT_REMOTE_100BTX) data |= PHY_AUTO_NEG_100BTX; if (link & PORT_REMOTE_10BT_FD) data |= PHY_AUTO_NEG_10BT_FD; if (link & PORT_REMOTE_10BT) data |= PHY_AUTO_NEG_10BT; if (data & ~PHY_AUTO_NEG_802_3) data |= PHY_REMOTE_ACKNOWLEDGE_NOT; break; default: processed = false; break; } if (processed) *val = data; } static void ksz8795_w_phy(struct ksz_device *dev, u16 phy, u16 reg, u16 val) { u8 p = phy; u8 restart, speed, ctrl, data; switch (reg) { case PHY_REG_CTRL: /* Do not support PHY reset function. */ if (val & PHY_RESET) break; ksz_pread8(dev, p, P_SPEED_STATUS, &speed); data = speed; if (val & PHY_HP_MDIX) data |= PORT_HP_MDIX; else data &= ~PORT_HP_MDIX; if (data != speed) ksz_pwrite8(dev, p, P_SPEED_STATUS, data); ksz_pread8(dev, p, P_FORCE_CTRL, &ctrl); data = ctrl; if (!(val & PHY_AUTO_NEG_ENABLE)) data |= PORT_AUTO_NEG_DISABLE; else data &= ~PORT_AUTO_NEG_DISABLE; /* Fiber port does not support auto-negotiation. */ if (dev->ports[p].fiber) data |= PORT_AUTO_NEG_DISABLE; if (val & PHY_SPEED_100MBIT) data |= PORT_FORCE_100_MBIT; else data &= ~PORT_FORCE_100_MBIT; if (val & PHY_FULL_DUPLEX) data |= PORT_FORCE_FULL_DUPLEX; else data &= ~PORT_FORCE_FULL_DUPLEX; if (data != ctrl) ksz_pwrite8(dev, p, P_FORCE_CTRL, data); ksz_pread8(dev, p, P_NEG_RESTART_CTRL, &restart); data = restart; if (val & PHY_LED_DISABLE) data |= PORT_LED_OFF; else data &= ~PORT_LED_OFF; if (val & PHY_TRANSMIT_DISABLE) data |= PORT_TX_DISABLE; else data &= ~PORT_TX_DISABLE; if (val & PHY_AUTO_NEG_RESTART) data |= PORT_AUTO_NEG_RESTART; else data &= ~(PORT_AUTO_NEG_RESTART); if (val & PHY_POWER_DOWN) data |= PORT_POWER_DOWN; else data &= ~PORT_POWER_DOWN; if (val & PHY_AUTO_MDIX_DISABLE) data |= PORT_AUTO_MDIX_DISABLE; else data &= ~PORT_AUTO_MDIX_DISABLE; if (val & PHY_FORCE_MDIX) data |= PORT_FORCE_MDIX; else data &= ~PORT_FORCE_MDIX; if (val & PHY_LOOPBACK) data |= PORT_PHY_LOOPBACK; else data &= ~PORT_PHY_LOOPBACK; if (data != restart) ksz_pwrite8(dev, p, P_NEG_RESTART_CTRL, data); break; case PHY_REG_AUTO_NEGOTIATION: ksz_pread8(dev, p, P_LOCAL_CTRL, &ctrl); data = ctrl; data &= ~(PORT_AUTO_NEG_SYM_PAUSE | PORT_AUTO_NEG_100BTX_FD | PORT_AUTO_NEG_100BTX | PORT_AUTO_NEG_10BT_FD | PORT_AUTO_NEG_10BT); if (val & PHY_AUTO_NEG_SYM_PAUSE) data |= PORT_AUTO_NEG_SYM_PAUSE; if (val & PHY_AUTO_NEG_100BTX_FD) data |= PORT_AUTO_NEG_100BTX_FD; if (val & PHY_AUTO_NEG_100BTX) data |= PORT_AUTO_NEG_100BTX; if (val & PHY_AUTO_NEG_10BT_FD) data |= PORT_AUTO_NEG_10BT_FD; if (val & PHY_AUTO_NEG_10BT) data |= PORT_AUTO_NEG_10BT; if (data != ctrl) ksz_pwrite8(dev, p, P_LOCAL_CTRL, data); break; default: break; } } static enum dsa_tag_protocol ksz8795_get_tag_protocol(struct dsa_switch *ds, int port, enum dsa_tag_protocol mp) { return DSA_TAG_PROTO_KSZ8795; } static void ksz8795_get_strings(struct dsa_switch *ds, int port, u32 stringset, uint8_t *buf) { int i; for (i = 0; i < TOTAL_SWITCH_COUNTER_NUM; i++) { memcpy(buf + i * ETH_GSTRING_LEN, mib_names[i].string, ETH_GSTRING_LEN); } } static void ksz8795_cfg_port_member(struct ksz_device *dev, int port, u8 member) { u8 data; ksz_pread8(dev, port, P_MIRROR_CTRL, &data); data &= ~PORT_VLAN_MEMBERSHIP; data |= (member & dev->port_mask); ksz_pwrite8(dev, port, P_MIRROR_CTRL, data); dev->ports[port].member = member; } static void ksz8795_port_stp_state_set(struct dsa_switch *ds, int port, u8 state) { struct ksz_device *dev = ds->priv; int forward = dev->member; struct ksz_port *p; int member = -1; u8 data; p = &dev->ports[port]; ksz_pread8(dev, port, P_STP_CTRL, &data); data &= ~(PORT_TX_ENABLE | PORT_RX_ENABLE | PORT_LEARN_DISABLE); switch (state) { case BR_STATE_DISABLED: data |= PORT_LEARN_DISABLE; if (port < SWITCH_PORT_NUM) member = 0; break; case BR_STATE_LISTENING: data |= (PORT_RX_ENABLE | PORT_LEARN_DISABLE); if (port < SWITCH_PORT_NUM && p->stp_state == BR_STATE_DISABLED) member = dev->host_mask | p->vid_member; break; case BR_STATE_LEARNING: data |= PORT_RX_ENABLE; break; case BR_STATE_FORWARDING: data |= (PORT_TX_ENABLE | PORT_RX_ENABLE); /* This function is also used internally. */ if (port == dev->cpu_port) break; /* Port is a member of a bridge. */ if (dev->br_member & BIT(port)) { dev->member |= BIT(port); member = dev->member; } else { member = dev->host_mask | p->vid_member; } break; case BR_STATE_BLOCKING: data |= PORT_LEARN_DISABLE; if (port < SWITCH_PORT_NUM && p->stp_state == BR_STATE_DISABLED) member = dev->host_mask | p->vid_member; break; default: dev_err(ds->dev, "invalid STP state: %d\n", state); return; } ksz_pwrite8(dev, port, P_STP_CTRL, data); p->stp_state = state; /* Port membership may share register with STP state. */ if (member >= 0 && member != p->member) ksz8795_cfg_port_member(dev, port, (u8)member); /* Check if forwarding needs to be updated. */ if (state != BR_STATE_FORWARDING) { if (dev->br_member & BIT(port)) dev->member &= ~BIT(port); } /* When topology has changed the function ksz_update_port_member * should be called to modify port forwarding behavior. */ if (forward != dev->member) ksz_update_port_member(dev, port); } static void ksz8795_flush_dyn_mac_table(struct ksz_device *dev, int port) { u8 learn[TOTAL_PORT_NUM]; int first, index, cnt; struct ksz_port *p; if ((uint)port < TOTAL_PORT_NUM) { first = port; cnt = port + 1; } else { /* Flush all ports. */ first = 0; cnt = dev->mib_port_cnt; } for (index = first; index < cnt; index++) { p = &dev->ports[index]; if (!p->on) continue; ksz_pread8(dev, index, P_STP_CTRL, &learn[index]); if (!(learn[index] & PORT_LEARN_DISABLE)) ksz_pwrite8(dev, index, P_STP_CTRL, learn[index] | PORT_LEARN_DISABLE); } ksz_cfg(dev, S_FLUSH_TABLE_CTRL, SW_FLUSH_DYN_MAC_TABLE, true); for (index = first; index < cnt; index++) { p = &dev->ports[index]; if (!p->on) continue; if (!(learn[index] & PORT_LEARN_DISABLE)) ksz_pwrite8(dev, index, P_STP_CTRL, learn[index]); } } static int ksz8795_port_vlan_filtering(struct dsa_switch *ds, int port, bool flag, struct switchdev_trans *trans) { struct ksz_device *dev = ds->priv; if (switchdev_trans_ph_prepare(trans)) return 0; ksz_cfg(dev, S_MIRROR_CTRL, SW_VLAN_ENABLE, flag); return 0; } static void ksz8795_port_vlan_add(struct dsa_switch *ds, int port, const struct switchdev_obj_port_vlan *vlan) { bool untagged = vlan->flags & BRIDGE_VLAN_INFO_UNTAGGED; struct ksz_device *dev = ds->priv; u16 data, vid, new_pvid = 0; u8 fid, member, valid; ksz_port_cfg(dev, port, P_TAG_CTRL, PORT_REMOVE_TAG, untagged); for (vid = vlan->vid_begin; vid <= vlan->vid_end; vid++) { ksz8795_r_vlan_table(dev, vid, &data); ksz8795_from_vlan(data, &fid, &member, &valid); /* First time to setup the VLAN entry. */ if (!valid) { /* Need to find a way to map VID to FID. */ fid = 1; valid = 1; } member |= BIT(port); ksz8795_to_vlan(fid, member, valid, &data); ksz8795_w_vlan_table(dev, vid, data); /* change PVID */ if (vlan->flags & BRIDGE_VLAN_INFO_PVID) new_pvid = vid; } if (new_pvid) { ksz_pread16(dev, port, REG_PORT_CTRL_VID, &vid); vid &= 0xfff; vid |= new_pvid; ksz_pwrite16(dev, port, REG_PORT_CTRL_VID, vid); } } static int ksz8795_port_vlan_del(struct dsa_switch *ds, int port, const struct switchdev_obj_port_vlan *vlan) { bool untagged = vlan->flags & BRIDGE_VLAN_INFO_UNTAGGED; struct ksz_device *dev = ds->priv; u16 data, vid, pvid, new_pvid = 0; u8 fid, member, valid; ksz_pread16(dev, port, REG_PORT_CTRL_VID, &pvid); pvid = pvid & 0xFFF; ksz_port_cfg(dev, port, P_TAG_CTRL, PORT_REMOVE_TAG, untagged); for (vid = vlan->vid_begin; vid <= vlan->vid_end; vid++) { ksz8795_r_vlan_table(dev, vid, &data); ksz8795_from_vlan(data, &fid, &member, &valid); member &= ~BIT(port); /* Invalidate the entry if no more member. */ if (!member) { fid = 0; valid = 0; } if (pvid == vid) new_pvid = 1; ksz8795_to_vlan(fid, member, valid, &data); ksz8795_w_vlan_table(dev, vid, data); } if (new_pvid != pvid) ksz_pwrite16(dev, port, REG_PORT_CTRL_VID, pvid); return 0; } static int ksz8795_port_mirror_add(struct dsa_switch *ds, int port, struct dsa_mall_mirror_tc_entry *mirror, bool ingress) { struct ksz_device *dev = ds->priv; if (ingress) { ksz_port_cfg(dev, port, P_MIRROR_CTRL, PORT_MIRROR_RX, true); dev->mirror_rx |= BIT(port); } else { ksz_port_cfg(dev, port, P_MIRROR_CTRL, PORT_MIRROR_TX, true); dev->mirror_tx |= BIT(port); } ksz_port_cfg(dev, port, P_MIRROR_CTRL, PORT_MIRROR_SNIFFER, false); /* configure mirror port */ if (dev->mirror_rx || dev->mirror_tx) ksz_port_cfg(dev, mirror->to_local_port, P_MIRROR_CTRL, PORT_MIRROR_SNIFFER, true); return 0; } static void ksz8795_port_mirror_del(struct dsa_switch *ds, int port, struct dsa_mall_mirror_tc_entry *mirror) { struct ksz_device *dev = ds->priv; u8 data; if (mirror->ingress) { ksz_port_cfg(dev, port, P_MIRROR_CTRL, PORT_MIRROR_RX, false); dev->mirror_rx &= ~BIT(port); } else { ksz_port_cfg(dev, port, P_MIRROR_CTRL, PORT_MIRROR_TX, false); dev->mirror_tx &= ~BIT(port); } ksz_pread8(dev, port, P_MIRROR_CTRL, &data); if (!dev->mirror_rx && !dev->mirror_tx) ksz_port_cfg(dev, mirror->to_local_port, P_MIRROR_CTRL, PORT_MIRROR_SNIFFER, false); } static void ksz8795_port_setup(struct ksz_device *dev, int port, bool cpu_port) { struct ksz_port *p = &dev->ports[port]; u8 data8, member; /* enable broadcast storm limit */ ksz_port_cfg(dev, port, P_BCAST_STORM_CTRL, PORT_BROADCAST_STORM, true); ksz8795_set_prio_queue(dev, port, 4); /* disable DiffServ priority */ ksz_port_cfg(dev, port, P_PRIO_CTRL, PORT_DIFFSERV_ENABLE, false); /* replace priority */ ksz_port_cfg(dev, port, P_802_1P_CTRL, PORT_802_1P_REMAPPING, false); /* enable 802.1p priority */ ksz_port_cfg(dev, port, P_PRIO_CTRL, PORT_802_1P_ENABLE, true); if (cpu_port) { if (!p->interface && dev->compat_interface) { dev_warn(dev->dev, "Using legacy switch \"phy-mode\" property, because it is missing on port %d node. " "Please update your device tree.\n", port); p->interface = dev->compat_interface; } /* Configure MII interface for proper network communication. */ ksz_read8(dev, REG_PORT_5_CTRL_6, &data8); data8 &= ~PORT_INTERFACE_TYPE; data8 &= ~PORT_GMII_1GPS_MODE; switch (p->interface) { case PHY_INTERFACE_MODE_MII: p->phydev.speed = SPEED_100; break; case PHY_INTERFACE_MODE_RMII: data8 |= PORT_INTERFACE_RMII; p->phydev.speed = SPEED_100; break; case PHY_INTERFACE_MODE_GMII: data8 |= PORT_GMII_1GPS_MODE; data8 |= PORT_INTERFACE_GMII; p->phydev.speed = SPEED_1000; break; default: data8 &= ~PORT_RGMII_ID_IN_ENABLE; data8 &= ~PORT_RGMII_ID_OUT_ENABLE; if (p->interface == PHY_INTERFACE_MODE_RGMII_ID || p->interface == PHY_INTERFACE_MODE_RGMII_RXID) data8 |= PORT_RGMII_ID_IN_ENABLE; if (p->interface == PHY_INTERFACE_MODE_RGMII_ID || p->interface == PHY_INTERFACE_MODE_RGMII_TXID) data8 |= PORT_RGMII_ID_OUT_ENABLE; data8 |= PORT_GMII_1GPS_MODE; data8 |= PORT_INTERFACE_RGMII; p->phydev.speed = SPEED_1000; break; } ksz_write8(dev, REG_PORT_5_CTRL_6, data8); p->phydev.duplex = 1; member = dev->port_mask; } else { member = dev->host_mask | p->vid_member; } ksz8795_cfg_port_member(dev, port, member); } static void ksz8795_config_cpu_port(struct dsa_switch *ds) { struct ksz_device *dev = ds->priv; struct ksz_port *p; u8 remote; int i; ds->num_ports = dev->port_cnt + 1; /* Switch marks the maximum frame with extra byte as oversize. */ ksz_cfg(dev, REG_SW_CTRL_2, SW_LEGAL_PACKET_DISABLE, true); ksz_cfg(dev, S_TAIL_TAG_CTRL, SW_TAIL_TAG_ENABLE, true); p = &dev->ports[dev->cpu_port]; p->vid_member = dev->port_mask; p->on = 1; ksz8795_port_setup(dev, dev->cpu_port, true); dev->member = dev->host_mask; for (i = 0; i < SWITCH_PORT_NUM; i++) { p = &dev->ports[i]; /* Initialize to non-zero so that ksz_cfg_port_member() will * be called. */ p->vid_member = BIT(i); p->member = dev->port_mask; ksz8795_port_stp_state_set(ds, i, BR_STATE_DISABLED); /* Last port may be disabled. */ if (i == dev->port_cnt) break; p->on = 1; p->phy = 1; } for (i = 0; i < dev->phy_port_cnt; i++) { p = &dev->ports[i]; if (!p->on) continue; ksz_pread8(dev, i, P_REMOTE_STATUS, &remote); if (remote & PORT_FIBER_MODE) p->fiber = 1; if (p->fiber) ksz_port_cfg(dev, i, P_STP_CTRL, PORT_FORCE_FLOW_CTRL, true); else ksz_port_cfg(dev, i, P_STP_CTRL, PORT_FORCE_FLOW_CTRL, false); } } static int ksz8795_setup(struct dsa_switch *ds) { struct ksz_device *dev = ds->priv; struct alu_struct alu; int i, ret = 0; dev->vlan_cache = devm_kcalloc(dev->dev, sizeof(struct vlan_table), dev->num_vlans, GFP_KERNEL); if (!dev->vlan_cache) return -ENOMEM; ret = ksz8795_reset_switch(dev); if (ret) { dev_err(ds->dev, "failed to reset switch\n"); return ret; } ksz_cfg(dev, S_REPLACE_VID_CTRL, SW_FLOW_CTRL, true); /* Enable automatic fast aging when link changed detected. */ ksz_cfg(dev, S_LINK_AGING_CTRL, SW_LINK_AUTO_AGING, true); /* Enable aggressive back off algorithm in half duplex mode. */ regmap_update_bits(dev->regmap[0], REG_SW_CTRL_1, SW_AGGR_BACKOFF, SW_AGGR_BACKOFF); /* * Make sure unicast VLAN boundary is set as default and * enable no excessive collision drop. */ regmap_update_bits(dev->regmap[0], REG_SW_CTRL_2, UNICAST_VLAN_BOUNDARY | NO_EXC_COLLISION_DROP, UNICAST_VLAN_BOUNDARY | NO_EXC_COLLISION_DROP); ksz8795_config_cpu_port(ds); ksz_cfg(dev, REG_SW_CTRL_2, MULTICAST_STORM_DISABLE, true); ksz_cfg(dev, S_REPLACE_VID_CTRL, SW_REPLACE_VID, false); ksz_cfg(dev, S_MIRROR_CTRL, SW_MIRROR_RX_TX, false); /* set broadcast storm protection 10% rate */ regmap_update_bits(dev->regmap[1], S_REPLACE_VID_CTRL, BROADCAST_STORM_RATE, (BROADCAST_STORM_VALUE * BROADCAST_STORM_PROT_RATE) / 100); for (i = 0; i < VLAN_TABLE_ENTRIES; i++) ksz8795_r_vlan_entries(dev, i); /* Setup STP address for STP operation. */ memset(&alu, 0, sizeof(alu)); ether_addr_copy(alu.mac, eth_stp_addr); alu.is_static = true; alu.is_override = true; alu.port_forward = dev->host_mask; ksz8795_w_sta_mac_table(dev, 0, &alu); ksz_init_mib_timer(dev); return 0; } static const struct dsa_switch_ops ksz8795_switch_ops = { .get_tag_protocol = ksz8795_get_tag_protocol, .setup = ksz8795_setup, .phy_read = ksz_phy_read16, .phy_write = ksz_phy_write16, .phylink_mac_link_down = ksz_mac_link_down, .port_enable = ksz_enable_port, .get_strings = ksz8795_get_strings, .get_ethtool_stats = ksz_get_ethtool_stats, .get_sset_count = ksz_sset_count, .port_bridge_join = ksz_port_bridge_join, .port_bridge_leave = ksz_port_bridge_leave, .port_stp_state_set = ksz8795_port_stp_state_set, .port_fast_age = ksz_port_fast_age, .port_vlan_filtering = ksz8795_port_vlan_filtering, .port_vlan_prepare = ksz_port_vlan_prepare, .port_vlan_add = ksz8795_port_vlan_add, .port_vlan_del = ksz8795_port_vlan_del, .port_fdb_dump = ksz_port_fdb_dump, .port_mdb_prepare = ksz_port_mdb_prepare, .port_mdb_add = ksz_port_mdb_add, .port_mdb_del = ksz_port_mdb_del, .port_mirror_add = ksz8795_port_mirror_add, .port_mirror_del = ksz8795_port_mirror_del, }; static u32 ksz8795_get_port_addr(int port, int offset) { return PORT_CTRL_ADDR(port, offset); } static int ksz8795_switch_detect(struct ksz_device *dev) { u8 id1, id2; u16 id16; int ret; /* read chip id */ ret = ksz_read16(dev, REG_CHIP_ID0, &id16); if (ret) return ret; id1 = id16 >> 8; id2 = id16 & SW_CHIP_ID_M; if (id1 != FAMILY_ID || (id2 != CHIP_ID_94 && id2 != CHIP_ID_95)) return -ENODEV; dev->mib_port_cnt = TOTAL_PORT_NUM; dev->phy_port_cnt = SWITCH_PORT_NUM; dev->port_cnt = SWITCH_PORT_NUM; if (id2 == CHIP_ID_95) { u8 val; id2 = 0x95; ksz_read8(dev, REG_PORT_1_STATUS_0, &val); if (val & PORT_FIBER_MODE) id2 = 0x65; } else if (id2 == CHIP_ID_94) { dev->port_cnt--; dev->last_port = dev->port_cnt; id2 = 0x94; } id16 &= ~0xff; id16 |= id2; dev->chip_id = id16; dev->cpu_port = dev->mib_port_cnt - 1; dev->host_mask = BIT(dev->cpu_port); return 0; } struct ksz_chip_data { u16 chip_id; const char *dev_name; int num_vlans; int num_alus; int num_statics; int cpu_ports; int port_cnt; }; static const struct ksz_chip_data ksz8795_switch_chips[] = { { .chip_id = 0x8795, .dev_name = "KSZ8795", .num_vlans = 4096, .num_alus = 0, .num_statics = 8, .cpu_ports = 0x10, /* can be configured as cpu port */ .port_cnt = 4, /* total physical port count */ }, { .chip_id = 0x8794, .dev_name = "KSZ8794", .num_vlans = 4096, .num_alus = 0, .num_statics = 8, .cpu_ports = 0x10, /* can be configured as cpu port */ .port_cnt = 3, /* total physical port count */ }, { .chip_id = 0x8765, .dev_name = "KSZ8765", .num_vlans = 4096, .num_alus = 0, .num_statics = 8, .cpu_ports = 0x10, /* can be configured as cpu port */ .port_cnt = 4, /* total physical port count */ }, }; static int ksz8795_switch_init(struct ksz_device *dev) { int i; dev->ds->ops = &ksz8795_switch_ops; for (i = 0; i < ARRAY_SIZE(ksz8795_switch_chips); i++) { const struct ksz_chip_data *chip = &ksz8795_switch_chips[i]; if (dev->chip_id == chip->chip_id) { dev->name = chip->dev_name; dev->num_vlans = chip->num_vlans; dev->num_alus = chip->num_alus; dev->num_statics = chip->num_statics; dev->port_cnt = chip->port_cnt; dev->cpu_ports = chip->cpu_ports; break; } } /* no switch found */ if (!dev->cpu_ports) return -ENODEV; dev->port_mask = BIT(dev->port_cnt) - 1; dev->port_mask |= dev->host_mask; dev->reg_mib_cnt = SWITCH_COUNTER_NUM; dev->mib_cnt = TOTAL_SWITCH_COUNTER_NUM; i = dev->mib_port_cnt; dev->ports = devm_kzalloc(dev->dev, sizeof(struct ksz_port) * i, GFP_KERNEL); if (!dev->ports) return -ENOMEM; for (i = 0; i < dev->mib_port_cnt; i++) { mutex_init(&dev->ports[i].mib.cnt_mutex); dev->ports[i].mib.counters = devm_kzalloc(dev->dev, sizeof(u64) * (TOTAL_SWITCH_COUNTER_NUM + 1), GFP_KERNEL); if (!dev->ports[i].mib.counters) return -ENOMEM; } /* set the real number of ports */ dev->ds->num_ports = dev->port_cnt + 1; return 0; } static void ksz8795_switch_exit(struct ksz_device *dev) { ksz8795_reset_switch(dev); } static const struct ksz_dev_ops ksz8795_dev_ops = { .get_port_addr = ksz8795_get_port_addr, .cfg_port_member = ksz8795_cfg_port_member, .flush_dyn_mac_table = ksz8795_flush_dyn_mac_table, .port_setup = ksz8795_port_setup, .r_phy = ksz8795_r_phy, .w_phy = ksz8795_w_phy, .r_dyn_mac_table = ksz8795_r_dyn_mac_table, .r_sta_mac_table = ksz8795_r_sta_mac_table, .w_sta_mac_table = ksz8795_w_sta_mac_table, .r_mib_cnt = ksz8795_r_mib_cnt, .r_mib_pkt = ksz8795_r_mib_pkt, .freeze_mib = ksz8795_freeze_mib, .port_init_cnt = ksz8795_port_init_cnt, .shutdown = ksz8795_reset_switch, .detect = ksz8795_switch_detect, .init = ksz8795_switch_init, .exit = ksz8795_switch_exit, }; int ksz8795_switch_register(struct ksz_device *dev) { return ksz_switch_register(dev, &ksz8795_dev_ops); } EXPORT_SYMBOL(ksz8795_switch_register); MODULE_AUTHOR("Tristram Ha "); MODULE_DESCRIPTION("Microchip KSZ8795 Series Switch DSA Driver"); MODULE_LICENSE("GPL");