diff options
Diffstat (limited to 'drivers/net/dsa/mt7530.c')
| -rw-r--r-- | drivers/net/dsa/mt7530.c | 1126 |
1 files changed, 1126 insertions, 0 deletions
diff --git a/drivers/net/dsa/mt7530.c b/drivers/net/dsa/mt7530.c new file mode 100644 index 000000000000..b070c167e70f --- /dev/null +++ b/drivers/net/dsa/mt7530.c @@ -0,0 +1,1126 @@ +/* + * Mediatek MT7530 DSA Switch driver + * Copyright (C) 2017 Sean Wang <sean.wang@mediatek.com> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License 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/etherdevice.h> +#include <linux/if_bridge.h> +#include <linux/iopoll.h> +#include <linux/mdio.h> +#include <linux/mfd/syscon.h> +#include <linux/module.h> +#include <linux/netdevice.h> +#include <linux/of_gpio.h> +#include <linux/of_mdio.h> +#include <linux/of_net.h> +#include <linux/of_platform.h> +#include <linux/phy.h> +#include <linux/regmap.h> +#include <linux/regulator/consumer.h> +#include <linux/reset.h> +#include <linux/gpio/consumer.h> +#include <net/dsa.h> +#include <net/switchdev.h> + +#include "mt7530.h" + +/* String, offset, and register size in bytes if different from 4 bytes */ +static const struct mt7530_mib_desc mt7530_mib[] = { + MIB_DESC(1, 0x00, "TxDrop"), + MIB_DESC(1, 0x04, "TxCrcErr"), + MIB_DESC(1, 0x08, "TxUnicast"), + MIB_DESC(1, 0x0c, "TxMulticast"), + MIB_DESC(1, 0x10, "TxBroadcast"), + MIB_DESC(1, 0x14, "TxCollision"), + MIB_DESC(1, 0x18, "TxSingleCollision"), + MIB_DESC(1, 0x1c, "TxMultipleCollision"), + MIB_DESC(1, 0x20, "TxDeferred"), + MIB_DESC(1, 0x24, "TxLateCollision"), + MIB_DESC(1, 0x28, "TxExcessiveCollistion"), + MIB_DESC(1, 0x2c, "TxPause"), + MIB_DESC(1, 0x30, "TxPktSz64"), + MIB_DESC(1, 0x34, "TxPktSz65To127"), + MIB_DESC(1, 0x38, "TxPktSz128To255"), + MIB_DESC(1, 0x3c, "TxPktSz256To511"), + MIB_DESC(1, 0x40, "TxPktSz512To1023"), + MIB_DESC(1, 0x44, "Tx1024ToMax"), + MIB_DESC(2, 0x48, "TxBytes"), + MIB_DESC(1, 0x60, "RxDrop"), + MIB_DESC(1, 0x64, "RxFiltering"), + MIB_DESC(1, 0x6c, "RxMulticast"), + MIB_DESC(1, 0x70, "RxBroadcast"), + MIB_DESC(1, 0x74, "RxAlignErr"), + MIB_DESC(1, 0x78, "RxCrcErr"), + MIB_DESC(1, 0x7c, "RxUnderSizeErr"), + MIB_DESC(1, 0x80, "RxFragErr"), + MIB_DESC(1, 0x84, "RxOverSzErr"), + MIB_DESC(1, 0x88, "RxJabberErr"), + MIB_DESC(1, 0x8c, "RxPause"), + MIB_DESC(1, 0x90, "RxPktSz64"), + MIB_DESC(1, 0x94, "RxPktSz65To127"), + MIB_DESC(1, 0x98, "RxPktSz128To255"), + MIB_DESC(1, 0x9c, "RxPktSz256To511"), + MIB_DESC(1, 0xa0, "RxPktSz512To1023"), + MIB_DESC(1, 0xa4, "RxPktSz1024ToMax"), + MIB_DESC(2, 0xa8, "RxBytes"), + MIB_DESC(1, 0xb0, "RxCtrlDrop"), + MIB_DESC(1, 0xb4, "RxIngressDrop"), + MIB_DESC(1, 0xb8, "RxArlDrop"), +}; + +static int +mt7623_trgmii_write(struct mt7530_priv *priv, u32 reg, u32 val) +{ + int ret; + + ret = regmap_write(priv->ethernet, TRGMII_BASE(reg), val); + if (ret < 0) + dev_err(priv->dev, + "failed to priv write register\n"); + return ret; +} + +static u32 +mt7623_trgmii_read(struct mt7530_priv *priv, u32 reg) +{ + int ret; + u32 val; + + ret = regmap_read(priv->ethernet, TRGMII_BASE(reg), &val); + if (ret < 0) { + dev_err(priv->dev, + "failed to priv read register\n"); + return ret; + } + + return val; +} + +static void +mt7623_trgmii_rmw(struct mt7530_priv *priv, u32 reg, + u32 mask, u32 set) +{ + u32 val; + + val = mt7623_trgmii_read(priv, reg); + val &= ~mask; + val |= set; + mt7623_trgmii_write(priv, reg, val); +} + +static void +mt7623_trgmii_set(struct mt7530_priv *priv, u32 reg, u32 val) +{ + mt7623_trgmii_rmw(priv, reg, 0, val); +} + +static void +mt7623_trgmii_clear(struct mt7530_priv *priv, u32 reg, u32 val) +{ + mt7623_trgmii_rmw(priv, reg, val, 0); +} + +static int +core_read_mmd_indirect(struct mt7530_priv *priv, int prtad, int devad) +{ + struct mii_bus *bus = priv->bus; + int value, ret; + + /* Write the desired MMD Devad */ + ret = bus->write(bus, 0, MII_MMD_CTRL, devad); + if (ret < 0) + goto err; + + /* Write the desired MMD register address */ + ret = bus->write(bus, 0, MII_MMD_DATA, prtad); + if (ret < 0) + goto err; + + /* Select the Function : DATA with no post increment */ + ret = bus->write(bus, 0, MII_MMD_CTRL, (devad | MII_MMD_CTRL_NOINCR)); + if (ret < 0) + goto err; + + /* Read the content of the MMD's selected register */ + value = bus->read(bus, 0, MII_MMD_DATA); + + return value; +err: + dev_err(&bus->dev, "failed to read mmd register\n"); + + return ret; +} + +static int +core_write_mmd_indirect(struct mt7530_priv *priv, int prtad, + int devad, u32 data) +{ + struct mii_bus *bus = priv->bus; + int ret; + + /* Write the desired MMD Devad */ + ret = bus->write(bus, 0, MII_MMD_CTRL, devad); + if (ret < 0) + goto err; + + /* Write the desired MMD register address */ + ret = bus->write(bus, 0, MII_MMD_DATA, prtad); + if (ret < 0) + goto err; + + /* Select the Function : DATA with no post increment */ + ret = bus->write(bus, 0, MII_MMD_CTRL, (devad | MII_MMD_CTRL_NOINCR)); + if (ret < 0) + goto err; + + /* Write the data into MMD's selected register */ + ret = bus->write(bus, 0, MII_MMD_DATA, data); +err: + if (ret < 0) + dev_err(&bus->dev, + "failed to write mmd register\n"); + return ret; +} + +static void +core_write(struct mt7530_priv *priv, u32 reg, u32 val) +{ + struct mii_bus *bus = priv->bus; + + mutex_lock_nested(&bus->mdio_lock, MDIO_MUTEX_NESTED); + + core_write_mmd_indirect(priv, reg, MDIO_MMD_VEND2, val); + + mutex_unlock(&bus->mdio_lock); +} + +static void +core_rmw(struct mt7530_priv *priv, u32 reg, u32 mask, u32 set) +{ + struct mii_bus *bus = priv->bus; + u32 val; + + mutex_lock_nested(&bus->mdio_lock, MDIO_MUTEX_NESTED); + + val = core_read_mmd_indirect(priv, reg, MDIO_MMD_VEND2); + val &= ~mask; + val |= set; + core_write_mmd_indirect(priv, reg, MDIO_MMD_VEND2, val); + + mutex_unlock(&bus->mdio_lock); +} + +static void +core_set(struct mt7530_priv *priv, u32 reg, u32 val) +{ + core_rmw(priv, reg, 0, val); +} + +static void +core_clear(struct mt7530_priv *priv, u32 reg, u32 val) +{ + core_rmw(priv, reg, val, 0); +} + +static int +mt7530_mii_write(struct mt7530_priv *priv, u32 reg, u32 val) +{ + struct mii_bus *bus = priv->bus; + u16 page, r, lo, hi; + int ret; + + page = (reg >> 6) & 0x3ff; + r = (reg >> 2) & 0xf; + lo = val & 0xffff; + hi = val >> 16; + + /* MT7530 uses 31 as the pseudo port */ + ret = bus->write(bus, 0x1f, 0x1f, page); + if (ret < 0) + goto err; + + ret = bus->write(bus, 0x1f, r, lo); + if (ret < 0) + goto err; + + ret = bus->write(bus, 0x1f, 0x10, hi); +err: + if (ret < 0) + dev_err(&bus->dev, + "failed to write mt7530 register\n"); + return ret; +} + +static u32 +mt7530_mii_read(struct mt7530_priv *priv, u32 reg) +{ + struct mii_bus *bus = priv->bus; + u16 page, r, lo, hi; + int ret; + + page = (reg >> 6) & 0x3ff; + r = (reg >> 2) & 0xf; + + /* MT7530 uses 31 as the pseudo port */ + ret = bus->write(bus, 0x1f, 0x1f, page); + if (ret < 0) { + dev_err(&bus->dev, + "failed to read mt7530 register\n"); + return ret; + } + + lo = bus->read(bus, 0x1f, r); + hi = bus->read(bus, 0x1f, 0x10); + + return (hi << 16) | (lo & 0xffff); +} + +static void +mt7530_write(struct mt7530_priv *priv, u32 reg, u32 val) +{ + struct mii_bus *bus = priv->bus; + + mutex_lock_nested(&bus->mdio_lock, MDIO_MUTEX_NESTED); + + mt7530_mii_write(priv, reg, val); + + mutex_unlock(&bus->mdio_lock); +} + +static u32 +_mt7530_read(struct mt7530_dummy_poll *p) +{ + struct mii_bus *bus = p->priv->bus; + u32 val; + + mutex_lock_nested(&bus->mdio_lock, MDIO_MUTEX_NESTED); + + val = mt7530_mii_read(p->priv, p->reg); + + mutex_unlock(&bus->mdio_lock); + + return val; +} + +static u32 +mt7530_read(struct mt7530_priv *priv, u32 reg) +{ + struct mt7530_dummy_poll p; + + INIT_MT7530_DUMMY_POLL(&p, priv, reg); + return _mt7530_read(&p); +} + +static void +mt7530_rmw(struct mt7530_priv *priv, u32 reg, + u32 mask, u32 set) +{ + struct mii_bus *bus = priv->bus; + u32 val; + + mutex_lock_nested(&bus->mdio_lock, MDIO_MUTEX_NESTED); + + val = mt7530_mii_read(priv, reg); + val &= ~mask; + val |= set; + mt7530_mii_write(priv, reg, val); + + mutex_unlock(&bus->mdio_lock); +} + +static void +mt7530_set(struct mt7530_priv *priv, u32 reg, u32 val) +{ + mt7530_rmw(priv, reg, 0, val); +} + +static void +mt7530_clear(struct mt7530_priv *priv, u32 reg, u32 val) +{ + mt7530_rmw(priv, reg, val, 0); +} + +static int +mt7530_fdb_cmd(struct mt7530_priv *priv, enum mt7530_fdb_cmd cmd, u32 *rsp) +{ + u32 val; + int ret; + struct mt7530_dummy_poll p; + + /* Set the command operating upon the MAC address entries */ + val = ATC_BUSY | ATC_MAT(0) | cmd; + mt7530_write(priv, MT7530_ATC, val); + + INIT_MT7530_DUMMY_POLL(&p, priv, MT7530_ATC); + ret = readx_poll_timeout(_mt7530_read, &p, val, + !(val & ATC_BUSY), 20, 20000); + if (ret < 0) { + dev_err(priv->dev, "reset timeout\n"); + return ret; + } + + /* Additional sanity for read command if the specified + * entry is invalid + */ + val = mt7530_read(priv, MT7530_ATC); + if ((cmd == MT7530_FDB_READ) && (val & ATC_INVALID)) + return -EINVAL; + + if (rsp) + *rsp = val; + + return 0; +} + +static void +mt7530_fdb_read(struct mt7530_priv *priv, struct mt7530_fdb *fdb) +{ + u32 reg[3]; + int i; + + /* Read from ARL table into an array */ + for (i = 0; i < 3; i++) { + reg[i] = mt7530_read(priv, MT7530_TSRA1 + (i * 4)); + + dev_dbg(priv->dev, "%s(%d) reg[%d]=0x%x\n", + __func__, __LINE__, i, reg[i]); + } + + fdb->vid = (reg[1] >> CVID) & CVID_MASK; + fdb->aging = (reg[2] >> AGE_TIMER) & AGE_TIMER_MASK; + fdb->port_mask = (reg[2] >> PORT_MAP) & PORT_MAP_MASK; + fdb->mac[0] = (reg[0] >> MAC_BYTE_0) & MAC_BYTE_MASK; + fdb->mac[1] = (reg[0] >> MAC_BYTE_1) & MAC_BYTE_MASK; + fdb->mac[2] = (reg[0] >> MAC_BYTE_2) & MAC_BYTE_MASK; + fdb->mac[3] = (reg[0] >> MAC_BYTE_3) & MAC_BYTE_MASK; + fdb->mac[4] = (reg[1] >> MAC_BYTE_4) & MAC_BYTE_MASK; + fdb->mac[5] = (reg[1] >> MAC_BYTE_5) & MAC_BYTE_MASK; + fdb->noarp = ((reg[2] >> ENT_STATUS) & ENT_STATUS_MASK) == STATIC_ENT; +} + +static void +mt7530_fdb_write(struct mt7530_priv *priv, u16 vid, + u8 port_mask, const u8 *mac, + u8 aging, u8 type) +{ + u32 reg[3] = { 0 }; + int i; + + reg[1] |= vid & CVID_MASK; + reg[2] |= (aging & AGE_TIMER_MASK) << AGE_TIMER; + reg[2] |= (port_mask & PORT_MAP_MASK) << PORT_MAP; + /* STATIC_ENT indicate that entry is static wouldn't + * be aged out and STATIC_EMP specified as erasing an + * entry + */ + reg[2] |= (type & ENT_STATUS_MASK) << ENT_STATUS; + reg[1] |= mac[5] << MAC_BYTE_5; + reg[1] |= mac[4] << MAC_BYTE_4; + reg[0] |= mac[3] << MAC_BYTE_3; + reg[0] |= mac[2] << MAC_BYTE_2; + reg[0] |= mac[1] << MAC_BYTE_1; + reg[0] |= mac[0] << MAC_BYTE_0; + + /* Write array into the ARL table */ + for (i = 0; i < 3; i++) + mt7530_write(priv, MT7530_ATA1 + (i * 4), reg[i]); +} + +static int +mt7530_pad_clk_setup(struct dsa_switch *ds, int mode) +{ + struct mt7530_priv *priv = ds->priv; + u32 ncpo1, ssc_delta, trgint, i; + + switch (mode) { + case PHY_INTERFACE_MODE_RGMII: + trgint = 0; + ncpo1 = 0x0c80; + ssc_delta = 0x87; + break; + case PHY_INTERFACE_MODE_TRGMII: + trgint = 1; + ncpo1 = 0x1400; + ssc_delta = 0x57; + break; + default: + dev_err(priv->dev, "xMII mode %d not supported\n", mode); + return -EINVAL; + } + + mt7530_rmw(priv, MT7530_P6ECR, P6_INTF_MODE_MASK, + P6_INTF_MODE(trgint)); + + /* Lower Tx Driving for TRGMII path */ + for (i = 0 ; i < NUM_TRGMII_CTRL ; i++) + mt7530_write(priv, MT7530_TRGMII_TD_ODT(i), + TD_DM_DRVP(8) | TD_DM_DRVN(8)); + + /* Setup core clock for MT7530 */ + if (!trgint) { + /* Disable MT7530 core clock */ + core_clear(priv, CORE_TRGMII_GSW_CLK_CG, REG_GSWCK_EN); + + /* Disable PLL, since phy_device has not yet been created + * provided for phy_[read,write]_mmd_indirect is called, we + * provide our own core_write_mmd_indirect to complete this + * function. + */ + core_write_mmd_indirect(priv, + CORE_GSWPLL_GRP1, + MDIO_MMD_VEND2, + 0); + + /* Set core clock into 500Mhz */ + core_write(priv, CORE_GSWPLL_GRP2, + RG_GSWPLL_POSDIV_500M(1) | + RG_GSWPLL_FBKDIV_500M(25)); + + /* Enable PLL */ + core_write(priv, CORE_GSWPLL_GRP1, + RG_GSWPLL_EN_PRE | + RG_GSWPLL_POSDIV_200M(2) | + RG_GSWPLL_FBKDIV_200M(32)); + + /* Enable MT7530 core clock */ + core_set(priv, CORE_TRGMII_GSW_CLK_CG, REG_GSWCK_EN); + } + + /* Setup the MT7530 TRGMII Tx Clock */ + core_set(priv, CORE_TRGMII_GSW_CLK_CG, REG_GSWCK_EN); + core_write(priv, CORE_PLL_GROUP5, RG_LCDDS_PCW_NCPO1(ncpo1)); + core_write(priv, CORE_PLL_GROUP6, RG_LCDDS_PCW_NCPO0(0)); + core_write(priv, CORE_PLL_GROUP10, RG_LCDDS_SSC_DELTA(ssc_delta)); + core_write(priv, CORE_PLL_GROUP11, RG_LCDDS_SSC_DELTA1(ssc_delta)); + core_write(priv, CORE_PLL_GROUP4, + RG_SYSPLL_DDSFBK_EN | RG_SYSPLL_BIAS_EN | + RG_SYSPLL_BIAS_LPF_EN); + core_write(priv, CORE_PLL_GROUP2, + RG_SYSPLL_EN_NORMAL | RG_SYSPLL_VODEN | + RG_SYSPLL_POSDIV(1)); + core_write(priv, CORE_PLL_GROUP7, + RG_LCDDS_PCW_NCPO_CHG | RG_LCCDS_C(3) | + RG_LCDDS_PWDB | RG_LCDDS_ISO_EN); + core_set(priv, CORE_TRGMII_GSW_CLK_CG, + REG_GSWCK_EN | REG_TRGMIICK_EN); + + if (!trgint) + for (i = 0 ; i < NUM_TRGMII_CTRL; i++) + mt7530_rmw(priv, MT7530_TRGMII_RD(i), + RD_TAP_MASK, RD_TAP(16)); + else + mt7623_trgmii_set(priv, GSW_INTF_MODE, INTF_MODE_TRGMII); + + return 0; +} + +static int +mt7623_pad_clk_setup(struct dsa_switch *ds) +{ + struct mt7530_priv *priv = ds->priv; + int i; + + for (i = 0 ; i < NUM_TRGMII_CTRL; i++) + mt7623_trgmii_write(priv, GSW_TRGMII_TD_ODT(i), + TD_DM_DRVP(8) | TD_DM_DRVN(8)); + + mt7623_trgmii_set(priv, GSW_TRGMII_RCK_CTRL, RX_RST | RXC_DQSISEL); + mt7623_trgmii_clear(priv, GSW_TRGMII_RCK_CTRL, RX_RST); + + return 0; +} + +static void +mt7530_mib_reset(struct dsa_switch *ds) +{ + struct mt7530_priv *priv = ds->priv; + + mt7530_write(priv, MT7530_MIB_CCR, CCR_MIB_FLUSH); + mt7530_write(priv, MT7530_MIB_CCR, CCR_MIB_ACTIVATE); +} + +static void +mt7530_port_set_status(struct mt7530_priv *priv, int port, int enable) +{ + u32 mask = PMCR_TX_EN | PMCR_RX_EN; + + if (enable) + mt7530_set(priv, MT7530_PMCR_P(port), mask); + else + mt7530_clear(priv, MT7530_PMCR_P(port), mask); +} + +static int mt7530_phy_read(struct dsa_switch *ds, int port, int regnum) +{ + struct mt7530_priv *priv = ds->priv; + + return mdiobus_read_nested(priv->bus, port, regnum); +} + +int mt7530_phy_write(struct dsa_switch *ds, int port, int regnum, u16 val) +{ + struct mt7530_priv *priv = ds->priv; + + return mdiobus_write_nested(priv->bus, port, regnum, val); +} + +static void +mt7530_get_strings(struct dsa_switch *ds, int port, uint8_t *data) +{ + int i; + + for (i = 0; i < ARRAY_SIZE(mt7530_mib); i++) + strncpy(data + i * ETH_GSTRING_LEN, mt7530_mib[i].name, + ETH_GSTRING_LEN); +} + +static void +mt7530_get_ethtool_stats(struct dsa_switch *ds, int port, + uint64_t *data) +{ + struct mt7530_priv *priv = ds->priv; + const struct mt7530_mib_desc *mib; + u32 reg, i; + u64 hi; + + for (i = 0; i < ARRAY_SIZE(mt7530_mib); i++) { + mib = &mt7530_mib[i]; + reg = MT7530_PORT_MIB_COUNTER(port) + mib->offset; + + data[i] = mt7530_read(priv, reg); + if (mib->size == 2) { + hi = mt7530_read(priv, reg + 4); + data[i] |= hi << 32; + } + } +} + +static int +mt7530_get_sset_count(struct dsa_switch *ds) +{ + return ARRAY_SIZE(mt7530_mib); +} + +static void mt7530_adjust_link(struct dsa_switch *ds, int port, + struct phy_device *phydev) +{ + struct mt7530_priv *priv = ds->priv; + + if (phy_is_pseudo_fixed_link(phydev)) { + dev_dbg(priv->dev, "phy-mode for master device = %x\n", + phydev->interface); + + /* Setup TX circuit incluing relevant PAD and driving */ + mt7530_pad_clk_setup(ds, phydev->interface); + + /* Setup RX circuit, relevant PAD and driving on the host + * which must be placed after the setup on the device side is + * all finished. + */ + mt7623_pad_clk_setup(ds); + } +} + +static int +mt7530_cpu_port_enable(struct mt7530_priv *priv, + int port) +{ + /* Enable Mediatek header mode on the cpu port */ + mt7530_write(priv, MT7530_PVC_P(port), + PORT_SPEC_TAG); + + /* Setup the MAC by default for the cpu port */ + mt7530_write(priv, MT7530_PMCR_P(port), PMCR_CPUP_LINK); + + /* Disable auto learning on the cpu port */ + mt7530_set(priv, MT7530_PSC_P(port), SA_DIS); + + /* Unknown unicast frame fordwarding to the cpu port */ + mt7530_set(priv, MT7530_MFC, UNU_FFP(BIT(port))); + + /* CPU port gets connected to all user ports of + * the switch + */ + mt7530_write(priv, MT7530_PCR_P(port), + PCR_MATRIX(priv->ds->enabled_port_mask)); + + return 0; +} + +static int +mt7530_port_enable(struct dsa_switch *ds, int port, + struct phy_device *phy) +{ + struct mt7530_priv *priv = ds->priv; + + mutex_lock(&priv->reg_mutex); + + /* Setup the MAC for the user port */ + mt7530_write(priv, MT7530_PMCR_P(port), PMCR_USERP_LINK); + + /* Allow the user port gets connected to the cpu port and also + * restore the port matrix if the port is the member of a certain + * bridge. + */ + priv->ports[port].pm |= PCR_MATRIX(BIT(MT7530_CPU_PORT)); + priv->ports[port].enable = true; + mt7530_rmw(priv, MT7530_PCR_P(port), PCR_MATRIX_MASK, + priv->ports[port].pm); + mt7530_port_set_status(priv, port, 1); + + mutex_unlock(&priv->reg_mutex); + + return 0; +} + +static void +mt7530_port_disable(struct dsa_switch *ds, int port, + struct phy_device *phy) +{ + struct mt7530_priv *priv = ds->priv; + + mutex_lock(&priv->reg_mutex); + + /* Clear up all port matrix which could be restored in the next + * enablement for the port. + */ + priv->ports[port].enable = false; + mt7530_rmw(priv, MT7530_PCR_P(port), PCR_MATRIX_MASK, + PCR_MATRIX_CLR); + mt7530_port_set_status(priv, port, 0); + + mutex_unlock(&priv->reg_mutex); +} + +static void +mt7530_stp_state_set(struct dsa_switch *ds, int port, u8 state) +{ + struct mt7530_priv *priv = ds->priv; + u32 stp_state; + + switch (state) { + case BR_STATE_DISABLED: + stp_state = MT7530_STP_DISABLED; + break; + case BR_STATE_BLOCKING: + stp_state = MT7530_STP_BLOCKING; + break; + case BR_STATE_LISTENING: + stp_state = MT7530_STP_LISTENING; + break; + case BR_STATE_LEARNING: + stp_state = MT7530_STP_LEARNING; + break; + case BR_STATE_FORWARDING: + default: + stp_state = MT7530_STP_FORWARDING; + break; + } + + mt7530_rmw(priv, MT7530_SSP_P(port), FID_PST_MASK, stp_state); +} + +static int +mt7530_port_bridge_join(struct dsa_switch *ds, int port, + struct net_device *bridge) +{ + struct mt7530_priv *priv = ds->priv; + u32 port_bitmap = BIT(MT7530_CPU_PORT); + int i; + + mutex_lock(&priv->reg_mutex); + + for (i = 0; i < MT7530_NUM_PORTS; i++) { + /* Add this port to the port matrix of the other ports in the + * same bridge. If the port is disabled, port matrix is kept + * and not being setup until the port becomes enabled. + */ + if (ds->enabled_port_mask & BIT(i) && i != port) { + if (ds->ports[i].bridge_dev != bridge) + continue; + if (priv->ports[i].enable) + mt7530_set(priv, MT7530_PCR_P(i), + PCR_MATRIX(BIT(port))); + priv->ports[i].pm |= PCR_MATRIX(BIT(port)); + + port_bitmap |= BIT(i); + } + } + + /* Add the all other ports to this port matrix. */ + if (priv->ports[port].enable) + mt7530_rmw(priv, MT7530_PCR_P(port), + PCR_MATRIX_MASK, PCR_MATRIX(port_bitmap)); + priv->ports[port].pm |= PCR_MATRIX(port_bitmap); + + mutex_unlock(&priv->reg_mutex); + + return 0; +} + +static void +mt7530_port_bridge_leave(struct dsa_switch *ds, int port, + struct net_device *bridge) +{ + struct mt7530_priv *priv = ds->priv; + int i; + + mutex_lock(&priv->reg_mutex); + + for (i = 0; i < MT7530_NUM_PORTS; i++) { + /* Remove this port from the port matrix of the other ports + * in the same bridge. If the port is disabled, port matrix + * is kept and not being setup until the port becomes enabled. + */ + if (ds->enabled_port_mask & BIT(i) && i != port) { + if (ds->ports[i].bridge_dev != bridge) + continue; + if (priv->ports[i].enable) + mt7530_clear(priv, MT7530_PCR_P(i), + PCR_MATRIX(BIT(port))); + priv->ports[i].pm &= ~PCR_MATRIX(BIT(port)); + } + } + + /* Set the cpu port to be the only one in the port matrix of + * this port. + */ + if (priv->ports[port].enable) + mt7530_rmw(priv, MT7530_PCR_P(port), PCR_MATRIX_MASK, + PCR_MATRIX(BIT(MT7530_CPU_PORT))); + priv->ports[port].pm = PCR_MATRIX(BIT(MT7530_CPU_PORT)); + + mutex_unlock(&priv->reg_mutex); +} + +static int +mt7530_port_fdb_prepare(struct dsa_switch *ds, int port, + const struct switchdev_obj_port_fdb *fdb, + struct switchdev_trans *trans) +{ + struct mt7530_priv *priv = ds->priv; + int ret; + + /* Because auto-learned entrie shares the same FDB table. + * an entry is reserved with no port_mask to make sure fdb_add + * is called while the entry is still available. + */ + mutex_lock(&priv->reg_mutex); + mt7530_fdb_write(priv, fdb->vid, 0, fdb->addr, -1, STATIC_ENT); + ret = mt7530_fdb_cmd(priv, MT7530_FDB_WRITE, 0); + mutex_unlock(&priv->reg_mutex); + + return ret; +} + +static void +mt7530_port_fdb_add(struct dsa_switch *ds, int port, + const struct switchdev_obj_port_fdb *fdb, + struct switchdev_trans *trans) +{ + struct mt7530_priv *priv = ds->priv; + u8 port_mask = BIT(port); + + mutex_lock(&priv->reg_mutex); + mt7530_fdb_write(priv, fdb->vid, port_mask, fdb->addr, -1, STATIC_ENT); + mt7530_fdb_cmd(priv, MT7530_FDB_WRITE, 0); + mutex_unlock(&priv->reg_mutex); +} + +static int +mt7530_port_fdb_del(struct dsa_switch *ds, int port, + const struct switchdev_obj_port_fdb *fdb) +{ + struct mt7530_priv *priv = ds->priv; + int ret; + u8 port_mask = BIT(port); + + mutex_lock(&priv->reg_mutex); + mt7530_fdb_write(priv, fdb->vid, port_mask, fdb->addr, -1, STATIC_EMP); + ret = mt7530_fdb_cmd(priv, MT7530_FDB_WRITE, 0); + mutex_unlock(&priv->reg_mutex); + + return ret; +} + +static int +mt7530_port_fdb_dump(struct dsa_switch *ds, int port, + struct switchdev_obj_port_fdb *fdb, + int (*cb)(struct switchdev_obj *obj)) +{ + struct mt7530_priv *priv = ds->priv; + struct mt7530_fdb _fdb = { 0 }; + int cnt = MT7530_NUM_FDB_RECORDS; + int ret = 0; + u32 rsp = 0; + + mutex_lock(&priv->reg_mutex); + + ret = mt7530_fdb_cmd(priv, MT7530_FDB_START, &rsp); + if (ret < 0) + goto err; + + do { + if (rsp & ATC_SRCH_HIT) { + mt7530_fdb_read(priv, &_fdb); + if (_fdb.port_mask & BIT(port)) { + ether_addr_copy(fdb->addr, _fdb.mac); + fdb->vid = _fdb.vid; + fdb->ndm_state = _fdb.noarp ? + NUD_NOARP : NUD_REACHABLE; + ret = cb(&fdb->obj); + if (ret < 0) + break; + } + } + } while (--cnt && + !(rsp & ATC_SRCH_END) && + !mt7530_fdb_cmd(priv, MT7530_FDB_NEXT, &rsp)); +err: + mutex_unlock(&priv->reg_mutex); + + return 0; +} + +static enum dsa_tag_protocol +mtk_get_tag_protocol(struct dsa_switch *ds) +{ + struct mt7530_priv *priv = ds->priv; + + if (!dsa_is_cpu_port(ds, MT7530_CPU_PORT)) { + dev_warn(priv->dev, + "port not matched with tagging CPU port\n"); + return DSA_TAG_PROTO_NONE; + } else { + return DSA_TAG_PROTO_MTK; + } +} + +static int +mt7530_setup(struct dsa_switch *ds) +{ + struct mt7530_priv *priv = ds->priv; + int ret, i; + u32 id, val; + struct device_node *dn; + struct mt7530_dummy_poll p; + + /* The parent node of master_netdev which holds the common system + * controller also is the container for two GMACs nodes representing + * as two netdev instances. + */ + dn = ds->master_netdev->dev.of_node->parent; + priv->ethernet = syscon_node_to_regmap(dn); + if (IS_ERR(priv->ethernet)) + return PTR_ERR(priv->ethernet); + + regulator_set_voltage(priv->core_pwr, 1000000, 1000000); + ret = regulator_enable(priv->core_pwr); + if (ret < 0) { + dev_err(priv->dev, + "Failed to enable core power: %d\n", ret); + return ret; + } + + regulator_set_voltage(priv->io_pwr, 3300000, 3300000); + ret = regulator_enable(priv->io_pwr); + if (ret < 0) { + dev_err(priv->dev, "Failed to enable io pwr: %d\n", + ret); + return ret; + } + + /* Reset whole chip through gpio pin or memory-mapped registers for + * different type of hardware + */ + if (priv->mcm) { + reset_control_assert(priv->rstc); + usleep_range(1000, 1100); + reset_control_deassert(priv->rstc); + } else { + gpiod_set_value_cansleep(priv->reset, 0); + usleep_range(1000, 1100); + gpiod_set_value_cansleep(priv->reset, 1); + } + + /* Waiting for MT7530 got to stable */ + INIT_MT7530_DUMMY_POLL(&p, priv, MT7530_HWTRAP); + ret = readx_poll_timeout(_mt7530_read, &p, val, val != 0, + 20, 1000000); + if (ret < 0) { + dev_err(priv->dev, "reset timeout\n"); + return ret; + } + + id = mt7530_read(priv, MT7530_CREV); + id >>= CHIP_NAME_SHIFT; + if (id != MT7530_ID) { + dev_err(priv->dev, "chip %x can't be supported\n", id); + return -ENODEV; + } + + /* Reset the switch through internal reset */ + mt7530_write(priv, MT7530_SYS_CTRL, + SYS_CTRL_PHY_RST | SYS_CTRL_SW_RST | + SYS_CTRL_REG_RST); + + /* Enable Port 6 only; P5 as GMAC5 which currently is not supported */ + val = mt7530_read(priv, MT7530_MHWTRAP); + val &= ~MHWTRAP_P6_DIS & ~MHWTRAP_PHY_ACCESS; + val |= MHWTRAP_MANUAL; + mt7530_write(priv, MT7530_MHWTRAP, val); + + /* Enable and reset MIB counters */ + mt7530_mib_reset(ds); + + mt7530_clear(priv, MT7530_MFC, UNU_FFP_MASK); + + for (i = 0; i < MT7530_NUM_PORTS; i++) { + /* Disable forwarding by default on all ports */ + mt7530_rmw(priv, MT7530_PCR_P(i), PCR_MATRIX_MASK, + PCR_MATRIX_CLR); + + if (dsa_is_cpu_port(ds, i)) + mt7530_cpu_port_enable(priv, i); + else + mt7530_port_disable(ds, i, NULL); + } + + /* Flush the FDB table */ + ret = mt7530_fdb_cmd(priv, MT7530_FDB_FLUSH, 0); + if (ret < 0) + return ret; + + return 0; +} + +static struct dsa_switch_ops mt7530_switch_ops = { + .get_tag_protocol = mtk_get_tag_protocol, + .setup = mt7530_setup, + .get_strings = mt7530_get_strings, + .phy_read = mt7530_phy_read, + .phy_write = mt7530_phy_write, + .get_ethtool_stats = mt7530_get_ethtool_stats, + .get_sset_count = mt7530_get_sset_count, + .adjust_link = mt7530_adjust_link, + .port_enable = mt7530_port_enable, + .port_disable = mt7530_port_disable, + .port_stp_state_set = mt7530_stp_state_set, + .port_bridge_join = mt7530_port_bridge_join, + .port_bridge_leave = mt7530_port_bridge_leave, + .port_fdb_prepare = mt7530_port_fdb_prepare, + .port_fdb_add = mt7530_port_fdb_add, + .port_fdb_del = mt7530_port_fdb_del, + .port_fdb_dump = mt7530_port_fdb_dump, +}; + +static int +mt7530_probe(struct mdio_device *mdiodev) +{ + struct mt7530_priv *priv; + struct device_node *dn; + + dn = mdiodev->dev.of_node; + + priv = devm_kzalloc(&mdiodev->dev, sizeof(*priv), GFP_KERNEL); + if (!priv) + return -ENOMEM; + + priv->ds = dsa_switch_alloc(&mdiodev->dev, DSA_MAX_PORTS); + if (!priv->ds) + return -ENOMEM; + + /* Use medatek,mcm property to distinguish hardware type that would + * casues a little bit differences on power-on sequence. + */ + priv->mcm = of_property_read_bool(dn, "mediatek,mcm"); + if (priv->mcm) { + dev_info(&mdiodev->dev, "MT7530 adapts as multi-chip module\n"); + + priv->rstc = devm_reset_control_get(&mdiodev->dev, "mcm"); + if (IS_ERR(priv->rstc)) { + dev_err(&mdiodev->dev, "Couldn't get our reset line\n"); + return PTR_ERR(priv->rstc); + } + } + + priv->core_pwr = devm_regulator_get(&mdiodev->dev, "core"); + if (IS_ERR(priv->core_pwr)) + return PTR_ERR(priv->core_pwr); + + priv->io_pwr = devm_regulator_get(&mdiodev->dev, "io"); + if (IS_ERR(priv->io_pwr)) + return PTR_ERR(priv->io_pwr); + + /* Not MCM that indicates switch works as the remote standalone + * integrated circuit so the GPIO pin would be used to complete + * the reset, otherwise memory-mapped register accessing used + * through syscon provides in the case of MCM. + */ + if (!priv->mcm) { + priv->reset = devm_gpiod_get_optional(&mdiodev->dev, "reset", + GPIOD_OUT_LOW); + if (IS_ERR(priv->reset)) { + dev_err(&mdiodev->dev, "Couldn't get our reset line\n"); + return PTR_ERR(priv->reset); + } + } + + priv->bus = mdiodev->bus; + priv->dev = &mdiodev->dev; + priv->ds->priv = priv; + priv->ds->ops = &mt7530_switch_ops; + mutex_init(&priv->reg_mutex); + dev_set_drvdata(&mdiodev->dev, priv); + + return dsa_register_switch(priv->ds, &mdiodev->dev); +} + +static void +mt7530_remove(struct mdio_device *mdiodev) +{ + struct mt7530_priv *priv = dev_get_drvdata(&mdiodev->dev); + int ret = 0; + + ret = regulator_disable(priv->core_pwr); + if (ret < 0) + dev_err(priv->dev, + "Failed to disable core power: %d\n", ret); + + ret = regulator_disable(priv->io_pwr); + if (ret < 0) + dev_err(priv->dev, "Failed to disable io pwr: %d\n", + ret); + + dsa_unregister_switch(priv->ds); + mutex_destroy(&priv->reg_mutex); +} + +static const struct of_device_id mt7530_of_match[] = { + { .compatible = "mediatek,mt7530" }, + { /* sentinel */ }, +}; + +static struct mdio_driver mt7530_mdio_driver = { + .probe = mt7530_probe, + .remove = mt7530_remove, + .mdiodrv.driver = { + .name = "mt7530", + .of_match_table = mt7530_of_match, + }, +}; + +mdio_module_driver(mt7530_mdio_driver); + +MODULE_AUTHOR("Sean Wang <sean.wang@mediatek.com>"); +MODULE_DESCRIPTION("Driver for Mediatek MT7530 Switch"); +MODULE_LICENSE("GPL"); +MODULE_ALIAS("platform:mediatek-mt7530"); |