diff options
Diffstat (limited to 'drivers/net/dsa/qca8k.c')
| -rw-r--r-- | drivers/net/dsa/qca8k.c | 1060 |
1 files changed, 1060 insertions, 0 deletions
diff --git a/drivers/net/dsa/qca8k.c b/drivers/net/dsa/qca8k.c new file mode 100644 index 000000000000..7f3f1781c202 --- /dev/null +++ b/drivers/net/dsa/qca8k.c @@ -0,0 +1,1060 @@ +/* + * Copyright (C) 2009 Felix Fietkau <nbd@nbd.name> + * Copyright (C) 2011-2012 Gabor Juhos <juhosg@openwrt.org> + * Copyright (c) 2015, The Linux Foundation. All rights reserved. + * Copyright (c) 2016 John Crispin <john@phrozen.org> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 and + * only version 2 as published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#include <linux/module.h> +#include <linux/phy.h> +#include <linux/netdevice.h> +#include <net/dsa.h> +#include <net/switchdev.h> +#include <linux/of_net.h> +#include <linux/of_platform.h> +#include <linux/if_bridge.h> +#include <linux/mdio.h> +#include <linux/etherdevice.h> + +#include "qca8k.h" + +#define MIB_DESC(_s, _o, _n) \ + { \ + .size = (_s), \ + .offset = (_o), \ + .name = (_n), \ + } + +static const struct qca8k_mib_desc ar8327_mib[] = { + MIB_DESC(1, 0x00, "RxBroad"), + MIB_DESC(1, 0x04, "RxPause"), + MIB_DESC(1, 0x08, "RxMulti"), + MIB_DESC(1, 0x0c, "RxFcsErr"), + MIB_DESC(1, 0x10, "RxAlignErr"), + MIB_DESC(1, 0x14, "RxRunt"), + MIB_DESC(1, 0x18, "RxFragment"), + MIB_DESC(1, 0x1c, "Rx64Byte"), + MIB_DESC(1, 0x20, "Rx128Byte"), + MIB_DESC(1, 0x24, "Rx256Byte"), + MIB_DESC(1, 0x28, "Rx512Byte"), + MIB_DESC(1, 0x2c, "Rx1024Byte"), + MIB_DESC(1, 0x30, "Rx1518Byte"), + MIB_DESC(1, 0x34, "RxMaxByte"), + MIB_DESC(1, 0x38, "RxTooLong"), + MIB_DESC(2, 0x3c, "RxGoodByte"), + MIB_DESC(2, 0x44, "RxBadByte"), + MIB_DESC(1, 0x4c, "RxOverFlow"), + MIB_DESC(1, 0x50, "Filtered"), + MIB_DESC(1, 0x54, "TxBroad"), + MIB_DESC(1, 0x58, "TxPause"), + MIB_DESC(1, 0x5c, "TxMulti"), + MIB_DESC(1, 0x60, "TxUnderRun"), + MIB_DESC(1, 0x64, "Tx64Byte"), + MIB_DESC(1, 0x68, "Tx128Byte"), + MIB_DESC(1, 0x6c, "Tx256Byte"), + MIB_DESC(1, 0x70, "Tx512Byte"), + MIB_DESC(1, 0x74, "Tx1024Byte"), + MIB_DESC(1, 0x78, "Tx1518Byte"), + MIB_DESC(1, 0x7c, "TxMaxByte"), + MIB_DESC(1, 0x80, "TxOverSize"), + MIB_DESC(2, 0x84, "TxByte"), + MIB_DESC(1, 0x8c, "TxCollision"), + MIB_DESC(1, 0x90, "TxAbortCol"), + MIB_DESC(1, 0x94, "TxMultiCol"), + MIB_DESC(1, 0x98, "TxSingleCol"), + MIB_DESC(1, 0x9c, "TxExcDefer"), + MIB_DESC(1, 0xa0, "TxDefer"), + MIB_DESC(1, 0xa4, "TxLateCol"), +}; + +/* The 32bit switch registers are accessed indirectly. To achieve this we need + * to set the page of the register. Track the last page that was set to reduce + * mdio writes + */ +static u16 qca8k_current_page = 0xffff; + +static void +qca8k_split_addr(u32 regaddr, u16 *r1, u16 *r2, u16 *page) +{ + regaddr >>= 1; + *r1 = regaddr & 0x1e; + + regaddr >>= 5; + *r2 = regaddr & 0x7; + + regaddr >>= 3; + *page = regaddr & 0x3ff; +} + +static u32 +qca8k_mii_read32(struct mii_bus *bus, int phy_id, u32 regnum) +{ + u32 val; + int ret; + + ret = bus->read(bus, phy_id, regnum); + if (ret >= 0) { + val = ret; + ret = bus->read(bus, phy_id, regnum + 1); + val |= ret << 16; + } + + if (ret < 0) { + dev_err_ratelimited(&bus->dev, + "failed to read qca8k 32bit register\n"); + return ret; + } + + return val; +} + +static void +qca8k_mii_write32(struct mii_bus *bus, int phy_id, u32 regnum, u32 val) +{ + u16 lo, hi; + int ret; + + lo = val & 0xffff; + hi = (u16)(val >> 16); + + ret = bus->write(bus, phy_id, regnum, lo); + if (ret >= 0) + ret = bus->write(bus, phy_id, regnum + 1, hi); + if (ret < 0) + dev_err_ratelimited(&bus->dev, + "failed to write qca8k 32bit register\n"); +} + +static void +qca8k_set_page(struct mii_bus *bus, u16 page) +{ + if (page == qca8k_current_page) + return; + + if (bus->write(bus, 0x18, 0, page) < 0) + dev_err_ratelimited(&bus->dev, + "failed to set qca8k page\n"); + qca8k_current_page = page; +} + +static u32 +qca8k_read(struct qca8k_priv *priv, u32 reg) +{ + u16 r1, r2, page; + u32 val; + + qca8k_split_addr(reg, &r1, &r2, &page); + + mutex_lock_nested(&priv->bus->mdio_lock, MDIO_MUTEX_NESTED); + + qca8k_set_page(priv->bus, page); + val = qca8k_mii_read32(priv->bus, 0x10 | r2, r1); + + mutex_unlock(&priv->bus->mdio_lock); + + return val; +} + +static void +qca8k_write(struct qca8k_priv *priv, u32 reg, u32 val) +{ + u16 r1, r2, page; + + qca8k_split_addr(reg, &r1, &r2, &page); + + mutex_lock_nested(&priv->bus->mdio_lock, MDIO_MUTEX_NESTED); + + qca8k_set_page(priv->bus, page); + qca8k_mii_write32(priv->bus, 0x10 | r2, r1, val); + + mutex_unlock(&priv->bus->mdio_lock); +} + +static u32 +qca8k_rmw(struct qca8k_priv *priv, u32 reg, u32 mask, u32 val) +{ + u16 r1, r2, page; + u32 ret; + + qca8k_split_addr(reg, &r1, &r2, &page); + + mutex_lock_nested(&priv->bus->mdio_lock, MDIO_MUTEX_NESTED); + + qca8k_set_page(priv->bus, page); + ret = qca8k_mii_read32(priv->bus, 0x10 | r2, r1); + ret &= ~mask; + ret |= val; + qca8k_mii_write32(priv->bus, 0x10 | r2, r1, ret); + + mutex_unlock(&priv->bus->mdio_lock); + + return ret; +} + +static void +qca8k_reg_set(struct qca8k_priv *priv, u32 reg, u32 val) +{ + qca8k_rmw(priv, reg, 0, val); +} + +static void +qca8k_reg_clear(struct qca8k_priv *priv, u32 reg, u32 val) +{ + qca8k_rmw(priv, reg, val, 0); +} + +static int +qca8k_regmap_read(void *ctx, uint32_t reg, uint32_t *val) +{ + struct qca8k_priv *priv = (struct qca8k_priv *)ctx; + + *val = qca8k_read(priv, reg); + + return 0; +} + +static int +qca8k_regmap_write(void *ctx, uint32_t reg, uint32_t val) +{ + struct qca8k_priv *priv = (struct qca8k_priv *)ctx; + + qca8k_write(priv, reg, val); + + return 0; +} + +static const struct regmap_range qca8k_readable_ranges[] = { + regmap_reg_range(0x0000, 0x00e4), /* Global control */ + regmap_reg_range(0x0100, 0x0168), /* EEE control */ + regmap_reg_range(0x0200, 0x0270), /* Parser control */ + regmap_reg_range(0x0400, 0x0454), /* ACL */ + regmap_reg_range(0x0600, 0x0718), /* Lookup */ + regmap_reg_range(0x0800, 0x0b70), /* QM */ + regmap_reg_range(0x0c00, 0x0c80), /* PKT */ + regmap_reg_range(0x0e00, 0x0e98), /* L3 */ + regmap_reg_range(0x1000, 0x10ac), /* MIB - Port0 */ + regmap_reg_range(0x1100, 0x11ac), /* MIB - Port1 */ + regmap_reg_range(0x1200, 0x12ac), /* MIB - Port2 */ + regmap_reg_range(0x1300, 0x13ac), /* MIB - Port3 */ + regmap_reg_range(0x1400, 0x14ac), /* MIB - Port4 */ + regmap_reg_range(0x1500, 0x15ac), /* MIB - Port5 */ + regmap_reg_range(0x1600, 0x16ac), /* MIB - Port6 */ + +}; + +static struct regmap_access_table qca8k_readable_table = { + .yes_ranges = qca8k_readable_ranges, + .n_yes_ranges = ARRAY_SIZE(qca8k_readable_ranges), +}; + +struct regmap_config qca8k_regmap_config = { + .reg_bits = 16, + .val_bits = 32, + .reg_stride = 4, + .max_register = 0x16ac, /* end MIB - Port6 range */ + .reg_read = qca8k_regmap_read, + .reg_write = qca8k_regmap_write, + .rd_table = &qca8k_readable_table, +}; + +static int +qca8k_busy_wait(struct qca8k_priv *priv, u32 reg, u32 mask) +{ + unsigned long timeout; + + timeout = jiffies + msecs_to_jiffies(20); + + /* loop until the busy flag has cleared */ + do { + u32 val = qca8k_read(priv, reg); + int busy = val & mask; + + if (!busy) + break; + cond_resched(); + } while (!time_after_eq(jiffies, timeout)); + + return time_after_eq(jiffies, timeout); +} + +static void +qca8k_fdb_read(struct qca8k_priv *priv, struct qca8k_fdb *fdb) +{ + u32 reg[4]; + int i; + + /* load the ARL table into an array */ + for (i = 0; i < 4; i++) + reg[i] = qca8k_read(priv, QCA8K_REG_ATU_DATA0 + (i * 4)); + + /* vid - 83:72 */ + fdb->vid = (reg[2] >> QCA8K_ATU_VID_S) & QCA8K_ATU_VID_M; + /* aging - 67:64 */ + fdb->aging = reg[2] & QCA8K_ATU_STATUS_M; + /* portmask - 54:48 */ + fdb->port_mask = (reg[1] >> QCA8K_ATU_PORT_S) & QCA8K_ATU_PORT_M; + /* mac - 47:0 */ + fdb->mac[0] = (reg[1] >> QCA8K_ATU_ADDR0_S) & 0xff; + fdb->mac[1] = reg[1] & 0xff; + fdb->mac[2] = (reg[0] >> QCA8K_ATU_ADDR2_S) & 0xff; + fdb->mac[3] = (reg[0] >> QCA8K_ATU_ADDR3_S) & 0xff; + fdb->mac[4] = (reg[0] >> QCA8K_ATU_ADDR4_S) & 0xff; + fdb->mac[5] = reg[0] & 0xff; +} + +static void +qca8k_fdb_write(struct qca8k_priv *priv, u16 vid, u8 port_mask, const u8 *mac, + u8 aging) +{ + u32 reg[3] = { 0 }; + int i; + + /* vid - 83:72 */ + reg[2] = (vid & QCA8K_ATU_VID_M) << QCA8K_ATU_VID_S; + /* aging - 67:64 */ + reg[2] |= aging & QCA8K_ATU_STATUS_M; + /* portmask - 54:48 */ + reg[1] = (port_mask & QCA8K_ATU_PORT_M) << QCA8K_ATU_PORT_S; + /* mac - 47:0 */ + reg[1] |= mac[0] << QCA8K_ATU_ADDR0_S; + reg[1] |= mac[1]; + reg[0] |= mac[2] << QCA8K_ATU_ADDR2_S; + reg[0] |= mac[3] << QCA8K_ATU_ADDR3_S; + reg[0] |= mac[4] << QCA8K_ATU_ADDR4_S; + reg[0] |= mac[5]; + + /* load the array into the ARL table */ + for (i = 0; i < 3; i++) + qca8k_write(priv, QCA8K_REG_ATU_DATA0 + (i * 4), reg[i]); +} + +static int +qca8k_fdb_access(struct qca8k_priv *priv, enum qca8k_fdb_cmd cmd, int port) +{ + u32 reg; + + /* Set the command and FDB index */ + reg = QCA8K_ATU_FUNC_BUSY; + reg |= cmd; + if (port >= 0) { + reg |= QCA8K_ATU_FUNC_PORT_EN; + reg |= (port & QCA8K_ATU_FUNC_PORT_M) << QCA8K_ATU_FUNC_PORT_S; + } + + /* Write the function register triggering the table access */ + qca8k_write(priv, QCA8K_REG_ATU_FUNC, reg); + + /* wait for completion */ + if (qca8k_busy_wait(priv, QCA8K_REG_ATU_FUNC, QCA8K_ATU_FUNC_BUSY)) + return -1; + + /* Check for table full violation when adding an entry */ + if (cmd == QCA8K_FDB_LOAD) { + reg = qca8k_read(priv, QCA8K_REG_ATU_FUNC); + if (reg & QCA8K_ATU_FUNC_FULL) + return -1; + } + + return 0; +} + +static int +qca8k_fdb_next(struct qca8k_priv *priv, struct qca8k_fdb *fdb, int port) +{ + int ret; + + qca8k_fdb_write(priv, fdb->vid, fdb->port_mask, fdb->mac, fdb->aging); + ret = qca8k_fdb_access(priv, QCA8K_FDB_NEXT, port); + if (ret >= 0) + qca8k_fdb_read(priv, fdb); + + return ret; +} + +static int +qca8k_fdb_add(struct qca8k_priv *priv, const u8 *mac, u16 port_mask, + u16 vid, u8 aging) +{ + int ret; + + mutex_lock(&priv->reg_mutex); + qca8k_fdb_write(priv, vid, port_mask, mac, aging); + ret = qca8k_fdb_access(priv, QCA8K_FDB_LOAD, -1); + mutex_unlock(&priv->reg_mutex); + + return ret; +} + +static int +qca8k_fdb_del(struct qca8k_priv *priv, const u8 *mac, u16 port_mask, u16 vid) +{ + int ret; + + mutex_lock(&priv->reg_mutex); + qca8k_fdb_write(priv, vid, port_mask, mac, 0); + ret = qca8k_fdb_access(priv, QCA8K_FDB_PURGE, -1); + mutex_unlock(&priv->reg_mutex); + + return ret; +} + +static void +qca8k_fdb_flush(struct qca8k_priv *priv) +{ + mutex_lock(&priv->reg_mutex); + qca8k_fdb_access(priv, QCA8K_FDB_FLUSH, -1); + mutex_unlock(&priv->reg_mutex); +} + +static void +qca8k_mib_init(struct qca8k_priv *priv) +{ + mutex_lock(&priv->reg_mutex); + qca8k_reg_set(priv, QCA8K_REG_MIB, QCA8K_MIB_FLUSH | QCA8K_MIB_BUSY); + qca8k_busy_wait(priv, QCA8K_REG_MIB, QCA8K_MIB_BUSY); + qca8k_reg_set(priv, QCA8K_REG_MIB, QCA8K_MIB_CPU_KEEP); + qca8k_write(priv, QCA8K_REG_MODULE_EN, QCA8K_MODULE_EN_MIB); + mutex_unlock(&priv->reg_mutex); +} + +static int +qca8k_set_pad_ctrl(struct qca8k_priv *priv, int port, int mode) +{ + u32 reg; + + switch (port) { + case 0: + reg = QCA8K_REG_PORT0_PAD_CTRL; + break; + case 6: + reg = QCA8K_REG_PORT6_PAD_CTRL; + break; + default: + pr_err("Can't set PAD_CTRL on port %d\n", port); + return -EINVAL; + } + + /* Configure a port to be directly connected to an external + * PHY or MAC. + */ + switch (mode) { + case PHY_INTERFACE_MODE_RGMII: + qca8k_write(priv, reg, + QCA8K_PORT_PAD_RGMII_EN | + QCA8K_PORT_PAD_RGMII_TX_DELAY(3) | + QCA8K_PORT_PAD_RGMII_RX_DELAY(3)); + + /* According to the datasheet, RGMII delay is enabled through + * PORT5_PAD_CTRL for all ports, rather than individual port + * registers + */ + qca8k_write(priv, QCA8K_REG_PORT5_PAD_CTRL, + QCA8K_PORT_PAD_RGMII_RX_DELAY_EN); + break; + case PHY_INTERFACE_MODE_SGMII: + qca8k_write(priv, reg, QCA8K_PORT_PAD_SGMII_EN); + break; + default: + pr_err("xMII mode %d not supported\n", mode); + return -EINVAL; + } + + return 0; +} + +static void +qca8k_port_set_status(struct qca8k_priv *priv, int port, int enable) +{ + u32 mask = QCA8K_PORT_STATUS_TXMAC; + + /* Port 0 and 6 have no internal PHY */ + if ((port > 0) && (port < 6)) + mask |= QCA8K_PORT_STATUS_LINK_AUTO; + + if (enable) + qca8k_reg_set(priv, QCA8K_REG_PORT_STATUS(port), mask); + else + qca8k_reg_clear(priv, QCA8K_REG_PORT_STATUS(port), mask); +} + +static int +qca8k_setup(struct dsa_switch *ds) +{ + struct qca8k_priv *priv = (struct qca8k_priv *)ds->priv; + int ret, i, phy_mode = -1; + + /* Make sure that port 0 is the cpu port */ + if (!dsa_is_cpu_port(ds, 0)) { + pr_err("port 0 is not the CPU port\n"); + return -EINVAL; + } + + mutex_init(&priv->reg_mutex); + + /* Start by setting up the register mapping */ + priv->regmap = devm_regmap_init(ds->dev, NULL, priv, + &qca8k_regmap_config); + if (IS_ERR(priv->regmap)) + pr_warn("regmap initialization failed"); + + /* Initialize CPU port pad mode (xMII type, delays...) */ + phy_mode = of_get_phy_mode(ds->ports[ds->dst->cpu_port].dn); + if (phy_mode < 0) { + pr_err("Can't find phy-mode for master device\n"); + return phy_mode; + } + ret = qca8k_set_pad_ctrl(priv, QCA8K_CPU_PORT, phy_mode); + if (ret < 0) + return ret; + + /* Enable CPU Port */ + qca8k_reg_set(priv, QCA8K_REG_GLOBAL_FW_CTRL0, + QCA8K_GLOBAL_FW_CTRL0_CPU_PORT_EN); + qca8k_port_set_status(priv, QCA8K_CPU_PORT, 1); + priv->port_sts[QCA8K_CPU_PORT].enabled = 1; + + /* Enable MIB counters */ + qca8k_mib_init(priv); + + /* Enable QCA header mode on the cpu port */ + qca8k_write(priv, QCA8K_REG_PORT_HDR_CTRL(QCA8K_CPU_PORT), + QCA8K_PORT_HDR_CTRL_ALL << QCA8K_PORT_HDR_CTRL_TX_S | + QCA8K_PORT_HDR_CTRL_ALL << QCA8K_PORT_HDR_CTRL_RX_S); + + /* Disable forwarding by default on all ports */ + for (i = 0; i < QCA8K_NUM_PORTS; i++) + qca8k_rmw(priv, QCA8K_PORT_LOOKUP_CTRL(i), + QCA8K_PORT_LOOKUP_MEMBER, 0); + + /* Disable MAC by default on all user ports */ + for (i = 1; i < QCA8K_NUM_PORTS; i++) + if (ds->enabled_port_mask & BIT(i)) + qca8k_port_set_status(priv, i, 0); + + /* Forward all unknown frames to CPU port for Linux processing */ + qca8k_write(priv, QCA8K_REG_GLOBAL_FW_CTRL1, + BIT(0) << QCA8K_GLOBAL_FW_CTRL1_IGMP_DP_S | + BIT(0) << QCA8K_GLOBAL_FW_CTRL1_BC_DP_S | + BIT(0) << QCA8K_GLOBAL_FW_CTRL1_MC_DP_S | + BIT(0) << QCA8K_GLOBAL_FW_CTRL1_UC_DP_S); + + /* Setup connection between CPU port & user ports */ + for (i = 0; i < DSA_MAX_PORTS; i++) { + /* CPU port gets connected to all user ports of the switch */ + if (dsa_is_cpu_port(ds, i)) { + qca8k_rmw(priv, QCA8K_PORT_LOOKUP_CTRL(QCA8K_CPU_PORT), + QCA8K_PORT_LOOKUP_MEMBER, + ds->enabled_port_mask); + } + + /* Invividual user ports get connected to CPU port only */ + if (ds->enabled_port_mask & BIT(i)) { + int shift = 16 * (i % 2); + + qca8k_rmw(priv, QCA8K_PORT_LOOKUP_CTRL(i), + QCA8K_PORT_LOOKUP_MEMBER, + BIT(QCA8K_CPU_PORT)); + + /* Enable ARP Auto-learning by default */ + qca8k_reg_set(priv, QCA8K_PORT_LOOKUP_CTRL(i), + QCA8K_PORT_LOOKUP_LEARN); + + /* For port based vlans to work we need to set the + * default egress vid + */ + qca8k_rmw(priv, QCA8K_EGRESS_VLAN(i), + 0xffff << shift, 1 << shift); + qca8k_write(priv, QCA8K_REG_PORT_VLAN_CTRL0(i), + QCA8K_PORT_VLAN_CVID(1) | + QCA8K_PORT_VLAN_SVID(1)); + } + } + + /* Flush the FDB table */ + qca8k_fdb_flush(priv); + + return 0; +} + +static int +qca8k_set_addr(struct dsa_switch *ds, u8 *addr) +{ + /* The subsystem always calls this function so add an empty stub */ + return 0; +} + +static int +qca8k_phy_read(struct dsa_switch *ds, int phy, int regnum) +{ + struct qca8k_priv *priv = (struct qca8k_priv *)ds->priv; + + return mdiobus_read(priv->bus, phy, regnum); +} + +static int +qca8k_phy_write(struct dsa_switch *ds, int phy, int regnum, u16 val) +{ + struct qca8k_priv *priv = (struct qca8k_priv *)ds->priv; + + return mdiobus_write(priv->bus, phy, regnum, val); +} + +static void +qca8k_get_strings(struct dsa_switch *ds, int port, uint8_t *data) +{ + int i; + + for (i = 0; i < ARRAY_SIZE(ar8327_mib); i++) + strncpy(data + i * ETH_GSTRING_LEN, ar8327_mib[i].name, + ETH_GSTRING_LEN); +} + +static void +qca8k_get_ethtool_stats(struct dsa_switch *ds, int port, + uint64_t *data) +{ + struct qca8k_priv *priv = (struct qca8k_priv *)ds->priv; + const struct qca8k_mib_desc *mib; + u32 reg, i; + u64 hi; + + for (i = 0; i < ARRAY_SIZE(ar8327_mib); i++) { + mib = &ar8327_mib[i]; + reg = QCA8K_PORT_MIB_COUNTER(port) + mib->offset; + + data[i] = qca8k_read(priv, reg); + if (mib->size == 2) { + hi = qca8k_read(priv, reg + 4); + data[i] |= hi << 32; + } + } +} + +static int +qca8k_get_sset_count(struct dsa_switch *ds) +{ + return ARRAY_SIZE(ar8327_mib); +} + +static void +qca8k_eee_enable_set(struct dsa_switch *ds, int port, bool enable) +{ + struct qca8k_priv *priv = (struct qca8k_priv *)ds->priv; + u32 lpi_en = QCA8K_REG_EEE_CTRL_LPI_EN(port); + u32 reg; + + mutex_lock(&priv->reg_mutex); + reg = qca8k_read(priv, QCA8K_REG_EEE_CTRL); + if (enable) + reg |= lpi_en; + else + reg &= ~lpi_en; + qca8k_write(priv, QCA8K_REG_EEE_CTRL, reg); + mutex_unlock(&priv->reg_mutex); +} + +static int +qca8k_eee_init(struct dsa_switch *ds, int port, + struct phy_device *phy) +{ + struct qca8k_priv *priv = (struct qca8k_priv *)ds->priv; + struct ethtool_eee *p = &priv->port_sts[port].eee; + int ret; + + p->supported = (SUPPORTED_1000baseT_Full | SUPPORTED_100baseT_Full); + + ret = phy_init_eee(phy, 0); + if (ret) + return ret; + + qca8k_eee_enable_set(ds, port, true); + + return 0; +} + +static int +qca8k_set_eee(struct dsa_switch *ds, int port, + struct phy_device *phydev, + struct ethtool_eee *e) +{ + struct qca8k_priv *priv = (struct qca8k_priv *)ds->priv; + struct ethtool_eee *p = &priv->port_sts[port].eee; + int ret = 0; + + p->eee_enabled = e->eee_enabled; + + if (e->eee_enabled) { + p->eee_enabled = qca8k_eee_init(ds, port, phydev); + if (!p->eee_enabled) + ret = -EOPNOTSUPP; + } + qca8k_eee_enable_set(ds, port, p->eee_enabled); + + return ret; +} + +static int +qca8k_get_eee(struct dsa_switch *ds, int port, + struct ethtool_eee *e) +{ + struct qca8k_priv *priv = (struct qca8k_priv *)ds->priv; + struct ethtool_eee *p = &priv->port_sts[port].eee; + struct net_device *netdev = ds->ports[port].netdev; + int ret; + + ret = phy_ethtool_get_eee(netdev->phydev, p); + if (!ret) + e->eee_active = + !!(p->supported & p->advertised & p->lp_advertised); + else + e->eee_active = 0; + + e->eee_enabled = p->eee_enabled; + + return ret; +} + +static void +qca8k_port_stp_state_set(struct dsa_switch *ds, int port, u8 state) +{ + struct qca8k_priv *priv = (struct qca8k_priv *)ds->priv; + u32 stp_state; + + switch (state) { + case BR_STATE_DISABLED: + stp_state = QCA8K_PORT_LOOKUP_STATE_DISABLED; + break; + case BR_STATE_BLOCKING: + stp_state = QCA8K_PORT_LOOKUP_STATE_BLOCKING; + break; + case BR_STATE_LISTENING: + stp_state = QCA8K_PORT_LOOKUP_STATE_LISTENING; + break; + case BR_STATE_LEARNING: + stp_state = QCA8K_PORT_LOOKUP_STATE_LEARNING; + break; + case BR_STATE_FORWARDING: + default: + stp_state = QCA8K_PORT_LOOKUP_STATE_FORWARD; + break; + } + + qca8k_rmw(priv, QCA8K_PORT_LOOKUP_CTRL(port), + QCA8K_PORT_LOOKUP_STATE_MASK, stp_state); +} + +static int +qca8k_port_bridge_join(struct dsa_switch *ds, int port, + struct net_device *bridge) +{ + struct qca8k_priv *priv = (struct qca8k_priv *)ds->priv; + int port_mask = BIT(QCA8K_CPU_PORT); + int i; + + priv->port_sts[port].bridge_dev = bridge; + + for (i = 1; i < QCA8K_NUM_PORTS; i++) { + if (priv->port_sts[i].bridge_dev != bridge) + continue; + /* Add this port to the portvlan mask of the other ports + * in the bridge + */ + qca8k_reg_set(priv, + QCA8K_PORT_LOOKUP_CTRL(i), + BIT(port)); + if (i != port) + port_mask |= BIT(i); + } + /* Add all other ports to this ports portvlan mask */ + qca8k_rmw(priv, QCA8K_PORT_LOOKUP_CTRL(port), + QCA8K_PORT_LOOKUP_MEMBER, port_mask); + + return 0; +} + +static void +qca8k_port_bridge_leave(struct dsa_switch *ds, int port) +{ + struct qca8k_priv *priv = (struct qca8k_priv *)ds->priv; + int i; + + for (i = 1; i < QCA8K_NUM_PORTS; i++) { + if (priv->port_sts[i].bridge_dev != + priv->port_sts[port].bridge_dev) + continue; + /* Remove this port to the portvlan mask of the other ports + * in the bridge + */ + qca8k_reg_clear(priv, + QCA8K_PORT_LOOKUP_CTRL(i), + BIT(port)); + } + priv->port_sts[port].bridge_dev = NULL; + /* Set the cpu port to be the only one in the portvlan mask of + * this port + */ + qca8k_rmw(priv, QCA8K_PORT_LOOKUP_CTRL(port), + QCA8K_PORT_LOOKUP_MEMBER, BIT(QCA8K_CPU_PORT)); +} + +static int +qca8k_port_enable(struct dsa_switch *ds, int port, + struct phy_device *phy) +{ + struct qca8k_priv *priv = (struct qca8k_priv *)ds->priv; + + qca8k_port_set_status(priv, port, 1); + priv->port_sts[port].enabled = 1; + + return 0; +} + +static void +qca8k_port_disable(struct dsa_switch *ds, int port, + struct phy_device *phy) +{ + struct qca8k_priv *priv = (struct qca8k_priv *)ds->priv; + + qca8k_port_set_status(priv, port, 0); + priv->port_sts[port].enabled = 0; +} + +static int +qca8k_port_fdb_insert(struct qca8k_priv *priv, const u8 *addr, + u16 port_mask, u16 vid) +{ + /* Set the vid to the port vlan id if no vid is set */ + if (!vid) + vid = 1; + + return qca8k_fdb_add(priv, addr, port_mask, vid, + QCA8K_ATU_STATUS_STATIC); +} + +static int +qca8k_port_fdb_prepare(struct dsa_switch *ds, int port, + const struct switchdev_obj_port_fdb *fdb, + struct switchdev_trans *trans) +{ + struct qca8k_priv *priv = (struct qca8k_priv *)ds->priv; + + /* The FDB table for static and auto learned entries is the same. We + * need to reserve an entry with no port_mask set to make sure that + * when port_fdb_add is called an entry is still available. Otherwise + * the last free entry might have been used up by auto learning + */ + return qca8k_port_fdb_insert(priv, fdb->addr, 0, fdb->vid); +} + +static void +qca8k_port_fdb_add(struct dsa_switch *ds, int port, + const struct switchdev_obj_port_fdb *fdb, + struct switchdev_trans *trans) +{ + struct qca8k_priv *priv = (struct qca8k_priv *)ds->priv; + u16 port_mask = BIT(port); + + /* Update the FDB entry adding the port_mask */ + qca8k_port_fdb_insert(priv, fdb->addr, port_mask, fdb->vid); +} + +static int +qca8k_port_fdb_del(struct dsa_switch *ds, int port, + const struct switchdev_obj_port_fdb *fdb) +{ + struct qca8k_priv *priv = (struct qca8k_priv *)ds->priv; + u16 port_mask = BIT(port); + u16 vid = fdb->vid; + + if (!vid) + vid = 1; + + return qca8k_fdb_del(priv, fdb->addr, port_mask, vid); +} + +static int +qca8k_port_fdb_dump(struct dsa_switch *ds, int port, + struct switchdev_obj_port_fdb *fdb, + int (*cb)(struct switchdev_obj *obj)) +{ + struct qca8k_priv *priv = (struct qca8k_priv *)ds->priv; + struct qca8k_fdb _fdb = { 0 }; + int cnt = QCA8K_NUM_FDB_RECORDS; + int ret = 0; + + mutex_lock(&priv->reg_mutex); + while (cnt-- && !qca8k_fdb_next(priv, &_fdb, port)) { + if (!_fdb.aging) + break; + + ether_addr_copy(fdb->addr, _fdb.mac); + fdb->vid = _fdb.vid; + if (_fdb.aging == QCA8K_ATU_STATUS_STATIC) + fdb->ndm_state = NUD_NOARP; + else + fdb->ndm_state = NUD_REACHABLE; + + ret = cb(&fdb->obj); + if (ret) + break; + } + mutex_unlock(&priv->reg_mutex); + + return 0; +} + +static enum dsa_tag_protocol +qca8k_get_tag_protocol(struct dsa_switch *ds) +{ + return DSA_TAG_PROTO_QCA; +} + +static struct dsa_switch_ops qca8k_switch_ops = { + .get_tag_protocol = qca8k_get_tag_protocol, + .setup = qca8k_setup, + .set_addr = qca8k_set_addr, + .get_strings = qca8k_get_strings, + .phy_read = qca8k_phy_read, + .phy_write = qca8k_phy_write, + .get_ethtool_stats = qca8k_get_ethtool_stats, + .get_sset_count = qca8k_get_sset_count, + .get_eee = qca8k_get_eee, + .set_eee = qca8k_set_eee, + .port_enable = qca8k_port_enable, + .port_disable = qca8k_port_disable, + .port_stp_state_set = qca8k_port_stp_state_set, + .port_bridge_join = qca8k_port_bridge_join, + .port_bridge_leave = qca8k_port_bridge_leave, + .port_fdb_prepare = qca8k_port_fdb_prepare, + .port_fdb_add = qca8k_port_fdb_add, + .port_fdb_del = qca8k_port_fdb_del, + .port_fdb_dump = qca8k_port_fdb_dump, +}; + +static int +qca8k_sw_probe(struct mdio_device *mdiodev) +{ + struct qca8k_priv *priv; + u32 id; + + /* allocate the private data struct so that we can probe the switches + * ID register + */ + priv = devm_kzalloc(&mdiodev->dev, sizeof(*priv), GFP_KERNEL); + if (!priv) + return -ENOMEM; + + priv->bus = mdiodev->bus; + + /* read the switches ID register */ + id = qca8k_read(priv, QCA8K_REG_MASK_CTRL); + id >>= QCA8K_MASK_CTRL_ID_S; + id &= QCA8K_MASK_CTRL_ID_M; + if (id != QCA8K_ID_QCA8337) + return -ENODEV; + + priv->ds = devm_kzalloc(&mdiodev->dev, sizeof(*priv->ds), GFP_KERNEL); + if (!priv->ds) + return -ENOMEM; + + priv->ds->priv = priv; + priv->ds->dev = &mdiodev->dev; + priv->ds->ops = &qca8k_switch_ops; + mutex_init(&priv->reg_mutex); + dev_set_drvdata(&mdiodev->dev, priv); + + return dsa_register_switch(priv->ds, priv->ds->dev->of_node); +} + +static void +qca8k_sw_remove(struct mdio_device *mdiodev) +{ + struct qca8k_priv *priv = dev_get_drvdata(&mdiodev->dev); + int i; + + for (i = 0; i < QCA8K_NUM_PORTS; i++) + qca8k_port_set_status(priv, i, 0); + + dsa_unregister_switch(priv->ds); +} + +#ifdef CONFIG_PM_SLEEP +static void +qca8k_set_pm(struct qca8k_priv *priv, int enable) +{ + int i; + + for (i = 0; i < QCA8K_NUM_PORTS; i++) { + if (!priv->port_sts[i].enabled) + continue; + + qca8k_port_set_status(priv, i, enable); + } +} + +static int qca8k_suspend(struct device *dev) +{ + struct platform_device *pdev = to_platform_device(dev); + struct qca8k_priv *priv = platform_get_drvdata(pdev); + + qca8k_set_pm(priv, 0); + + return dsa_switch_suspend(priv->ds); +} + +static int qca8k_resume(struct device *dev) +{ + struct platform_device *pdev = to_platform_device(dev); + struct qca8k_priv *priv = platform_get_drvdata(pdev); + + qca8k_set_pm(priv, 1); + + return dsa_switch_resume(priv->ds); +} +#endif /* CONFIG_PM_SLEEP */ + +static SIMPLE_DEV_PM_OPS(qca8k_pm_ops, + qca8k_suspend, qca8k_resume); + +static const struct of_device_id qca8k_of_match[] = { + { .compatible = "qca,qca8337" }, + { /* sentinel */ }, +}; + +static struct mdio_driver qca8kmdio_driver = { + .probe = qca8k_sw_probe, + .remove = qca8k_sw_remove, + .mdiodrv.driver = { + .name = "qca8k", + .of_match_table = qca8k_of_match, + .pm = &qca8k_pm_ops, + }, +}; + +static int __init +qca8kmdio_driver_register(void) +{ + return mdio_driver_register(&qca8kmdio_driver); +} +module_init(qca8kmdio_driver_register); + +static void __exit +qca8kmdio_driver_unregister(void) +{ + mdio_driver_unregister(&qca8kmdio_driver); +} +module_exit(qca8kmdio_driver_unregister); + +MODULE_AUTHOR("Mathieu Olivari, John Crispin <john@phrozen.org>"); +MODULE_DESCRIPTION("Driver for QCA8K ethernet switch family"); +MODULE_LICENSE("GPL v2"); +MODULE_ALIAS("platform:qca8k"); |