diff options
Diffstat (limited to 'drivers/net/dsa/mt7530.c')
| -rw-r--r-- | drivers/net/dsa/mt7530.c | 3417 |
1 files changed, 3417 insertions, 0 deletions
diff --git a/drivers/net/dsa/mt7530.c b/drivers/net/dsa/mt7530.c new file mode 100644 index 000000000..b988c8a40 --- /dev/null +++ b/drivers/net/dsa/mt7530.c @@ -0,0 +1,3417 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Mediatek MT7530 DSA Switch driver + * Copyright (C) 2017 Sean Wang <sean.wang@mediatek.com> + */ +#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_irq.h> +#include <linux/of_mdio.h> +#include <linux/of_net.h> +#include <linux/of_platform.h> +#include <linux/phylink.h> +#include <linux/regmap.h> +#include <linux/regulator/consumer.h> +#include <linux/reset.h> +#include <linux/gpio/consumer.h> +#include <linux/gpio/driver.h> +#include <net/dsa.h> + +#include "mt7530.h" + +static struct mt753x_pcs *pcs_to_mt753x_pcs(struct phylink_pcs *pcs) +{ + return container_of(pcs, struct mt753x_pcs, pcs); +} + +/* 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, 0x68, "RxUnicast"), + 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"), +}; + +/* Since phy_device has not yet been created and + * phy_{read,write}_mmd_indirect is not available, we provide our own + * core_{read,write}_mmd_indirect with core_{clear,write,set} wrappers + * to complete this function. + */ +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_unlocked_read(struct mt7530_dummy_poll *p) +{ + return mt7530_mii_read(p->priv, p->reg); +} + +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[1] |= ATA2_IVL; + reg[1] |= ATA2_FID(FID_BRIDGED); + 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]); +} + +/* Set up switch core clock for MT7530 */ +static void mt7530_pll_setup(struct mt7530_priv *priv) +{ + /* Disable core clock */ + core_clear(priv, CORE_TRGMII_GSW_CLK_CG, REG_GSWCK_EN); + + /* Disable PLL */ + core_write(priv, CORE_GSWPLL_GRP1, 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)); + + udelay(20); + + /* Enable core clock */ + core_set(priv, CORE_TRGMII_GSW_CLK_CG, REG_GSWCK_EN); +} + +/* Setup port 6 interface mode and TRGMII TX circuit */ +static int +mt7530_pad_clk_setup(struct dsa_switch *ds, phy_interface_t interface) +{ + struct mt7530_priv *priv = ds->priv; + u32 ncpo1, ssc_delta, trgint, xtal; + + xtal = mt7530_read(priv, MT7530_MHWTRAP) & HWTRAP_XTAL_MASK; + + if (xtal == HWTRAP_XTAL_20MHZ) { + dev_err(priv->dev, + "%s: MT7530 with a 20MHz XTAL is not supported!\n", + __func__); + return -EINVAL; + } + + switch (interface) { + case PHY_INTERFACE_MODE_RGMII: + trgint = 0; + break; + case PHY_INTERFACE_MODE_TRGMII: + trgint = 1; + if (xtal == HWTRAP_XTAL_25MHZ) + ssc_delta = 0x57; + else + ssc_delta = 0x87; + if (priv->id == ID_MT7621) { + /* PLL frequency: 125MHz: 1.0GBit */ + if (xtal == HWTRAP_XTAL_40MHZ) + ncpo1 = 0x0640; + if (xtal == HWTRAP_XTAL_25MHZ) + ncpo1 = 0x0a00; + } else { /* PLL frequency: 250MHz: 2.0Gbit */ + if (xtal == HWTRAP_XTAL_40MHZ) + ncpo1 = 0x0c80; + if (xtal == HWTRAP_XTAL_25MHZ) + ncpo1 = 0x1400; + } + break; + default: + dev_err(priv->dev, "xMII interface %d not supported\n", + interface); + return -EINVAL; + } + + mt7530_rmw(priv, MT7530_P6ECR, P6_INTF_MODE_MASK, + P6_INTF_MODE(trgint)); + + if (trgint) { + /* Disable the MT7530 TRGMII clocks */ + core_clear(priv, CORE_TRGMII_GSW_CLK_CG, REG_TRGMIICK_EN); + + /* Setup the MT7530 TRGMII Tx Clock */ + 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); + + /* Enable the MT7530 TRGMII clocks */ + core_set(priv, CORE_TRGMII_GSW_CLK_CG, REG_TRGMIICK_EN); + } + + return 0; +} + +static bool mt7531_dual_sgmii_supported(struct mt7530_priv *priv) +{ + u32 val; + + val = mt7530_read(priv, MT7531_TOP_SIG_SR); + + return (val & PAD_DUAL_SGMII_EN) != 0; +} + +static int +mt7531_pad_setup(struct dsa_switch *ds, phy_interface_t interface) +{ + return 0; +} + +static void +mt7531_pll_setup(struct mt7530_priv *priv) +{ + u32 top_sig; + u32 hwstrap; + u32 xtal; + u32 val; + + if (mt7531_dual_sgmii_supported(priv)) + return; + + val = mt7530_read(priv, MT7531_CREV); + top_sig = mt7530_read(priv, MT7531_TOP_SIG_SR); + hwstrap = mt7530_read(priv, MT7531_HWTRAP); + if ((val & CHIP_REV_M) > 0) + xtal = (top_sig & PAD_MCM_SMI_EN) ? HWTRAP_XTAL_FSEL_40MHZ : + HWTRAP_XTAL_FSEL_25MHZ; + else + xtal = hwstrap & HWTRAP_XTAL_FSEL_MASK; + + /* Step 1 : Disable MT7531 COREPLL */ + val = mt7530_read(priv, MT7531_PLLGP_EN); + val &= ~EN_COREPLL; + mt7530_write(priv, MT7531_PLLGP_EN, val); + + /* Step 2: switch to XTAL output */ + val = mt7530_read(priv, MT7531_PLLGP_EN); + val |= SW_CLKSW; + mt7530_write(priv, MT7531_PLLGP_EN, val); + + val = mt7530_read(priv, MT7531_PLLGP_CR0); + val &= ~RG_COREPLL_EN; + mt7530_write(priv, MT7531_PLLGP_CR0, val); + + /* Step 3: disable PLLGP and enable program PLLGP */ + val = mt7530_read(priv, MT7531_PLLGP_EN); + val |= SW_PLLGP; + mt7530_write(priv, MT7531_PLLGP_EN, val); + + /* Step 4: program COREPLL output frequency to 500MHz */ + val = mt7530_read(priv, MT7531_PLLGP_CR0); + val &= ~RG_COREPLL_POSDIV_M; + val |= 2 << RG_COREPLL_POSDIV_S; + mt7530_write(priv, MT7531_PLLGP_CR0, val); + usleep_range(25, 35); + + switch (xtal) { + case HWTRAP_XTAL_FSEL_25MHZ: + val = mt7530_read(priv, MT7531_PLLGP_CR0); + val &= ~RG_COREPLL_SDM_PCW_M; + val |= 0x140000 << RG_COREPLL_SDM_PCW_S; + mt7530_write(priv, MT7531_PLLGP_CR0, val); + break; + case HWTRAP_XTAL_FSEL_40MHZ: + val = mt7530_read(priv, MT7531_PLLGP_CR0); + val &= ~RG_COREPLL_SDM_PCW_M; + val |= 0x190000 << RG_COREPLL_SDM_PCW_S; + mt7530_write(priv, MT7531_PLLGP_CR0, val); + break; + } + + /* Set feedback divide ratio update signal to high */ + val = mt7530_read(priv, MT7531_PLLGP_CR0); + val |= RG_COREPLL_SDM_PCW_CHG; + mt7530_write(priv, MT7531_PLLGP_CR0, val); + /* Wait for at least 16 XTAL clocks */ + usleep_range(10, 20); + + /* Step 5: set feedback divide ratio update signal to low */ + val = mt7530_read(priv, MT7531_PLLGP_CR0); + val &= ~RG_COREPLL_SDM_PCW_CHG; + mt7530_write(priv, MT7531_PLLGP_CR0, val); + + /* Enable 325M clock for SGMII */ + mt7530_write(priv, MT7531_ANA_PLLGP_CR5, 0xad0000); + + /* Enable 250SSC clock for RGMII */ + mt7530_write(priv, MT7531_ANA_PLLGP_CR2, 0x4f40000); + + /* Step 6: Enable MT7531 PLL */ + val = mt7530_read(priv, MT7531_PLLGP_CR0); + val |= RG_COREPLL_EN; + mt7530_write(priv, MT7531_PLLGP_CR0, val); + + val = mt7530_read(priv, MT7531_PLLGP_EN); + val |= EN_COREPLL; + mt7530_write(priv, MT7531_PLLGP_EN, val); + usleep_range(25, 35); +} + +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 int mt7530_phy_read(struct mt7530_priv *priv, int port, int regnum) +{ + return mdiobus_read_nested(priv->bus, port, regnum); +} + +static int mt7530_phy_write(struct mt7530_priv *priv, int port, int regnum, + u16 val) +{ + return mdiobus_write_nested(priv->bus, port, regnum, val); +} + +static int +mt7531_ind_c45_phy_read(struct mt7530_priv *priv, int port, int devad, + int regnum) +{ + struct mii_bus *bus = priv->bus; + struct mt7530_dummy_poll p; + u32 reg, val; + int ret; + + INIT_MT7530_DUMMY_POLL(&p, priv, MT7531_PHY_IAC); + + mutex_lock_nested(&bus->mdio_lock, MDIO_MUTEX_NESTED); + + ret = readx_poll_timeout(_mt7530_unlocked_read, &p, val, + !(val & MT7531_PHY_ACS_ST), 20, 100000); + if (ret < 0) { + dev_err(priv->dev, "poll timeout\n"); + goto out; + } + + reg = MT7531_MDIO_CL45_ADDR | MT7531_MDIO_PHY_ADDR(port) | + MT7531_MDIO_DEV_ADDR(devad) | regnum; + mt7530_mii_write(priv, MT7531_PHY_IAC, reg | MT7531_PHY_ACS_ST); + + ret = readx_poll_timeout(_mt7530_unlocked_read, &p, val, + !(val & MT7531_PHY_ACS_ST), 20, 100000); + if (ret < 0) { + dev_err(priv->dev, "poll timeout\n"); + goto out; + } + + reg = MT7531_MDIO_CL45_READ | MT7531_MDIO_PHY_ADDR(port) | + MT7531_MDIO_DEV_ADDR(devad); + mt7530_mii_write(priv, MT7531_PHY_IAC, reg | MT7531_PHY_ACS_ST); + + ret = readx_poll_timeout(_mt7530_unlocked_read, &p, val, + !(val & MT7531_PHY_ACS_ST), 20, 100000); + if (ret < 0) { + dev_err(priv->dev, "poll timeout\n"); + goto out; + } + + ret = val & MT7531_MDIO_RW_DATA_MASK; +out: + mutex_unlock(&bus->mdio_lock); + + return ret; +} + +static int +mt7531_ind_c45_phy_write(struct mt7530_priv *priv, int port, int devad, + int regnum, u32 data) +{ + struct mii_bus *bus = priv->bus; + struct mt7530_dummy_poll p; + u32 val, reg; + int ret; + + INIT_MT7530_DUMMY_POLL(&p, priv, MT7531_PHY_IAC); + + mutex_lock_nested(&bus->mdio_lock, MDIO_MUTEX_NESTED); + + ret = readx_poll_timeout(_mt7530_unlocked_read, &p, val, + !(val & MT7531_PHY_ACS_ST), 20, 100000); + if (ret < 0) { + dev_err(priv->dev, "poll timeout\n"); + goto out; + } + + reg = MT7531_MDIO_CL45_ADDR | MT7531_MDIO_PHY_ADDR(port) | + MT7531_MDIO_DEV_ADDR(devad) | regnum; + mt7530_mii_write(priv, MT7531_PHY_IAC, reg | MT7531_PHY_ACS_ST); + + ret = readx_poll_timeout(_mt7530_unlocked_read, &p, val, + !(val & MT7531_PHY_ACS_ST), 20, 100000); + if (ret < 0) { + dev_err(priv->dev, "poll timeout\n"); + goto out; + } + + reg = MT7531_MDIO_CL45_WRITE | MT7531_MDIO_PHY_ADDR(port) | + MT7531_MDIO_DEV_ADDR(devad) | data; + mt7530_mii_write(priv, MT7531_PHY_IAC, reg | MT7531_PHY_ACS_ST); + + ret = readx_poll_timeout(_mt7530_unlocked_read, &p, val, + !(val & MT7531_PHY_ACS_ST), 20, 100000); + if (ret < 0) { + dev_err(priv->dev, "poll timeout\n"); + goto out; + } + +out: + mutex_unlock(&bus->mdio_lock); + + return ret; +} + +static int +mt7531_ind_c22_phy_read(struct mt7530_priv *priv, int port, int regnum) +{ + struct mii_bus *bus = priv->bus; + struct mt7530_dummy_poll p; + int ret; + u32 val; + + INIT_MT7530_DUMMY_POLL(&p, priv, MT7531_PHY_IAC); + + mutex_lock_nested(&bus->mdio_lock, MDIO_MUTEX_NESTED); + + ret = readx_poll_timeout(_mt7530_unlocked_read, &p, val, + !(val & MT7531_PHY_ACS_ST), 20, 100000); + if (ret < 0) { + dev_err(priv->dev, "poll timeout\n"); + goto out; + } + + val = MT7531_MDIO_CL22_READ | MT7531_MDIO_PHY_ADDR(port) | + MT7531_MDIO_REG_ADDR(regnum); + + mt7530_mii_write(priv, MT7531_PHY_IAC, val | MT7531_PHY_ACS_ST); + + ret = readx_poll_timeout(_mt7530_unlocked_read, &p, val, + !(val & MT7531_PHY_ACS_ST), 20, 100000); + if (ret < 0) { + dev_err(priv->dev, "poll timeout\n"); + goto out; + } + + ret = val & MT7531_MDIO_RW_DATA_MASK; +out: + mutex_unlock(&bus->mdio_lock); + + return ret; +} + +static int +mt7531_ind_c22_phy_write(struct mt7530_priv *priv, int port, int regnum, + u16 data) +{ + struct mii_bus *bus = priv->bus; + struct mt7530_dummy_poll p; + int ret; + u32 reg; + + INIT_MT7530_DUMMY_POLL(&p, priv, MT7531_PHY_IAC); + + mutex_lock_nested(&bus->mdio_lock, MDIO_MUTEX_NESTED); + + ret = readx_poll_timeout(_mt7530_unlocked_read, &p, reg, + !(reg & MT7531_PHY_ACS_ST), 20, 100000); + if (ret < 0) { + dev_err(priv->dev, "poll timeout\n"); + goto out; + } + + reg = MT7531_MDIO_CL22_WRITE | MT7531_MDIO_PHY_ADDR(port) | + MT7531_MDIO_REG_ADDR(regnum) | data; + + mt7530_mii_write(priv, MT7531_PHY_IAC, reg | MT7531_PHY_ACS_ST); + + ret = readx_poll_timeout(_mt7530_unlocked_read, &p, reg, + !(reg & MT7531_PHY_ACS_ST), 20, 100000); + if (ret < 0) { + dev_err(priv->dev, "poll timeout\n"); + goto out; + } + +out: + mutex_unlock(&bus->mdio_lock); + + return ret; +} + +static int +mt7531_ind_phy_read(struct mt7530_priv *priv, int port, int regnum) +{ + int devad; + int ret; + + if (regnum & MII_ADDR_C45) { + devad = (regnum >> MII_DEVADDR_C45_SHIFT) & 0x1f; + ret = mt7531_ind_c45_phy_read(priv, port, devad, + regnum & MII_REGADDR_C45_MASK); + } else { + ret = mt7531_ind_c22_phy_read(priv, port, regnum); + } + + return ret; +} + +static int +mt7531_ind_phy_write(struct mt7530_priv *priv, int port, int regnum, + u16 data) +{ + int devad; + int ret; + + if (regnum & MII_ADDR_C45) { + devad = (regnum >> MII_DEVADDR_C45_SHIFT) & 0x1f; + ret = mt7531_ind_c45_phy_write(priv, port, devad, + regnum & MII_REGADDR_C45_MASK, + data); + } else { + ret = mt7531_ind_c22_phy_write(priv, port, regnum, data); + } + + return ret; +} + +static int +mt753x_phy_read(struct mii_bus *bus, int port, int regnum) +{ + struct mt7530_priv *priv = bus->priv; + + return priv->info->phy_read(priv, port, regnum); +} + +static int +mt753x_phy_write(struct mii_bus *bus, int port, int regnum, u16 val) +{ + struct mt7530_priv *priv = bus->priv; + + return priv->info->phy_write(priv, port, regnum, val); +} + +static void +mt7530_get_strings(struct dsa_switch *ds, int port, u32 stringset, + uint8_t *data) +{ + int i; + + if (stringset != ETH_SS_STATS) + return; + + 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, int port, int sset) +{ + if (sset != ETH_SS_STATS) + return 0; + + return ARRAY_SIZE(mt7530_mib); +} + +static int +mt7530_set_ageing_time(struct dsa_switch *ds, unsigned int msecs) +{ + struct mt7530_priv *priv = ds->priv; + unsigned int secs = msecs / 1000; + unsigned int tmp_age_count; + unsigned int error = -1; + unsigned int age_count; + unsigned int age_unit; + + /* Applied timer is (AGE_CNT + 1) * (AGE_UNIT + 1) seconds */ + if (secs < 1 || secs > (AGE_CNT_MAX + 1) * (AGE_UNIT_MAX + 1)) + return -ERANGE; + + /* iterate through all possible age_count to find the closest pair */ + for (tmp_age_count = 0; tmp_age_count <= AGE_CNT_MAX; ++tmp_age_count) { + unsigned int tmp_age_unit = secs / (tmp_age_count + 1) - 1; + + if (tmp_age_unit <= AGE_UNIT_MAX) { + unsigned int tmp_error = secs - + (tmp_age_count + 1) * (tmp_age_unit + 1); + + /* found a closer pair */ + if (error > tmp_error) { + error = tmp_error; + age_count = tmp_age_count; + age_unit = tmp_age_unit; + } + + /* found the exact match, so break the loop */ + if (!error) + break; + } + } + + mt7530_write(priv, MT7530_AAC, AGE_CNT(age_count) | AGE_UNIT(age_unit)); + + return 0; +} + +static void mt7530_setup_port5(struct dsa_switch *ds, phy_interface_t interface) +{ + struct mt7530_priv *priv = ds->priv; + u8 tx_delay = 0; + int val; + + mutex_lock(&priv->reg_mutex); + + val = mt7530_read(priv, MT7530_MHWTRAP); + + val |= MHWTRAP_MANUAL | MHWTRAP_P5_MAC_SEL | MHWTRAP_P5_DIS; + val &= ~MHWTRAP_P5_RGMII_MODE & ~MHWTRAP_PHY0_SEL; + + switch (priv->p5_intf_sel) { + case P5_INTF_SEL_PHY_P0: + /* MT7530_P5_MODE_GPHY_P0: 2nd GMAC -> P5 -> P0 */ + val |= MHWTRAP_PHY0_SEL; + fallthrough; + case P5_INTF_SEL_PHY_P4: + /* MT7530_P5_MODE_GPHY_P4: 2nd GMAC -> P5 -> P4 */ + val &= ~MHWTRAP_P5_MAC_SEL & ~MHWTRAP_P5_DIS; + + /* Setup the MAC by default for the cpu port */ + mt7530_write(priv, MT7530_PMCR_P(5), 0x56300); + break; + case P5_INTF_SEL_GMAC5: + /* MT7530_P5_MODE_GMAC: P5 -> External phy or 2nd GMAC */ + val &= ~MHWTRAP_P5_DIS; + break; + case P5_DISABLED: + interface = PHY_INTERFACE_MODE_NA; + break; + default: + dev_err(ds->dev, "Unsupported p5_intf_sel %d\n", + priv->p5_intf_sel); + goto unlock_exit; + } + + /* Setup RGMII settings */ + if (phy_interface_mode_is_rgmii(interface)) { + val |= MHWTRAP_P5_RGMII_MODE; + + /* P5 RGMII RX Clock Control: delay setting for 1000M */ + mt7530_write(priv, MT7530_P5RGMIIRXCR, CSR_RGMII_EDGE_ALIGN); + + /* Don't set delay in DSA mode */ + if (!dsa_is_dsa_port(priv->ds, 5) && + (interface == PHY_INTERFACE_MODE_RGMII_TXID || + interface == PHY_INTERFACE_MODE_RGMII_ID)) + tx_delay = 4; /* n * 0.5 ns */ + + /* P5 RGMII TX Clock Control: delay x */ + mt7530_write(priv, MT7530_P5RGMIITXCR, + CSR_RGMII_TXC_CFG(0x10 + tx_delay)); + + /* reduce P5 RGMII Tx driving, 8mA */ + mt7530_write(priv, MT7530_IO_DRV_CR, + P5_IO_CLK_DRV(1) | P5_IO_DATA_DRV(1)); + } + + mt7530_write(priv, MT7530_MHWTRAP, val); + + dev_dbg(ds->dev, "Setup P5, HWTRAP=0x%x, intf_sel=%s, phy-mode=%s\n", + val, p5_intf_modes(priv->p5_intf_sel), phy_modes(interface)); + + priv->p5_interface = interface; + +unlock_exit: + mutex_unlock(&priv->reg_mutex); +} + +static void +mt753x_trap_frames(struct mt7530_priv *priv) +{ + /* Trap BPDUs to the CPU port(s) */ + mt7530_rmw(priv, MT753X_BPC, MT753X_BPDU_PORT_FW_MASK, + MT753X_BPDU_CPU_ONLY); + + /* Trap 802.1X PAE frames to the CPU port(s) */ + mt7530_rmw(priv, MT753X_BPC, MT753X_PAE_PORT_FW_MASK, + MT753X_PAE_PORT_FW(MT753X_BPDU_CPU_ONLY)); + + /* Trap LLDP frames with :0E MAC DA to the CPU port(s) */ + mt7530_rmw(priv, MT753X_RGAC2, MT753X_R0E_PORT_FW_MASK, + MT753X_R0E_PORT_FW(MT753X_BPDU_CPU_ONLY)); +} + +static int +mt753x_cpu_port_enable(struct dsa_switch *ds, int port) +{ + struct mt7530_priv *priv = ds->priv; + int ret; + + /* Setup max capability of CPU port at first */ + if (priv->info->cpu_port_config) { + ret = priv->info->cpu_port_config(ds, port); + if (ret) + return ret; + } + + /* Enable Mediatek header mode on the cpu port */ + mt7530_write(priv, MT7530_PVC_P(port), + PORT_SPEC_TAG); + + /* Enable flooding on the CPU port */ + mt7530_set(priv, MT7530_MFC, BC_FFP(BIT(port)) | UNM_FFP(BIT(port)) | + UNU_FFP(BIT(port))); + + /* Set CPU port number */ + if (priv->id == ID_MT7530 || priv->id == ID_MT7621) + mt7530_rmw(priv, MT7530_MFC, CPU_MASK, CPU_EN | CPU_PORT(port)); + + /* CPU port gets connected to all user ports of + * the switch. + */ + mt7530_write(priv, MT7530_PCR_P(port), + PCR_MATRIX(dsa_user_ports(priv->ds))); + + /* Set to fallback mode for independent VLAN learning */ + mt7530_rmw(priv, MT7530_PCR_P(port), PCR_PORT_VLAN_MASK, + MT7530_PORT_FALLBACK_MODE); + + return 0; +} + +static int +mt7530_port_enable(struct dsa_switch *ds, int port, + struct phy_device *phy) +{ + struct dsa_port *dp = dsa_to_port(ds, port); + struct mt7530_priv *priv = ds->priv; + + mutex_lock(&priv->reg_mutex); + + /* 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. + */ + if (dsa_port_is_user(dp)) { + struct dsa_port *cpu_dp = dp->cpu_dp; + + priv->ports[port].pm |= PCR_MATRIX(BIT(cpu_dp->index)); + } + priv->ports[port].enable = true; + mt7530_rmw(priv, MT7530_PCR_P(port), PCR_MATRIX_MASK, + priv->ports[port].pm); + mt7530_clear(priv, MT7530_PMCR_P(port), PMCR_LINK_SETTINGS_MASK); + + mutex_unlock(&priv->reg_mutex); + + return 0; +} + +static void +mt7530_port_disable(struct dsa_switch *ds, int port) +{ + 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_clear(priv, MT7530_PMCR_P(port), PMCR_LINK_SETTINGS_MASK); + + mutex_unlock(&priv->reg_mutex); +} + +static int +mt7530_port_change_mtu(struct dsa_switch *ds, int port, int new_mtu) +{ + struct mt7530_priv *priv = ds->priv; + struct mii_bus *bus = priv->bus; + int length; + u32 val; + + /* When a new MTU is set, DSA always set the CPU port's MTU to the + * largest MTU of the slave ports. Because the switch only has a global + * RX length register, only allowing CPU port here is enough. + */ + if (!dsa_is_cpu_port(ds, port)) + return 0; + + mutex_lock_nested(&bus->mdio_lock, MDIO_MUTEX_NESTED); + + val = mt7530_mii_read(priv, MT7530_GMACCR); + val &= ~MAX_RX_PKT_LEN_MASK; + + /* RX length also includes Ethernet header, MTK tag, and FCS length */ + length = new_mtu + ETH_HLEN + MTK_HDR_LEN + ETH_FCS_LEN; + if (length <= 1522) { + val |= MAX_RX_PKT_LEN_1522; + } else if (length <= 1536) { + val |= MAX_RX_PKT_LEN_1536; + } else if (length <= 1552) { + val |= MAX_RX_PKT_LEN_1552; + } else { + val &= ~MAX_RX_JUMBO_MASK; + val |= MAX_RX_JUMBO(DIV_ROUND_UP(length, 1024)); + val |= MAX_RX_PKT_LEN_JUMBO; + } + + mt7530_mii_write(priv, MT7530_GMACCR, val); + + mutex_unlock(&bus->mdio_lock); + + return 0; +} + +static int +mt7530_port_max_mtu(struct dsa_switch *ds, int port) +{ + return MT7530_MAX_MTU; +} + +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(FID_BRIDGED), + FID_PST(FID_BRIDGED, stp_state)); +} + +static int +mt7530_port_pre_bridge_flags(struct dsa_switch *ds, int port, + struct switchdev_brport_flags flags, + struct netlink_ext_ack *extack) +{ + if (flags.mask & ~(BR_LEARNING | BR_FLOOD | BR_MCAST_FLOOD | + BR_BCAST_FLOOD)) + return -EINVAL; + + return 0; +} + +static int +mt7530_port_bridge_flags(struct dsa_switch *ds, int port, + struct switchdev_brport_flags flags, + struct netlink_ext_ack *extack) +{ + struct mt7530_priv *priv = ds->priv; + + if (flags.mask & BR_LEARNING) + mt7530_rmw(priv, MT7530_PSC_P(port), SA_DIS, + flags.val & BR_LEARNING ? 0 : SA_DIS); + + if (flags.mask & BR_FLOOD) + mt7530_rmw(priv, MT7530_MFC, UNU_FFP(BIT(port)), + flags.val & BR_FLOOD ? UNU_FFP(BIT(port)) : 0); + + if (flags.mask & BR_MCAST_FLOOD) + mt7530_rmw(priv, MT7530_MFC, UNM_FFP(BIT(port)), + flags.val & BR_MCAST_FLOOD ? UNM_FFP(BIT(port)) : 0); + + if (flags.mask & BR_BCAST_FLOOD) + mt7530_rmw(priv, MT7530_MFC, BC_FFP(BIT(port)), + flags.val & BR_BCAST_FLOOD ? BC_FFP(BIT(port)) : 0); + + return 0; +} + +static int +mt7530_port_bridge_join(struct dsa_switch *ds, int port, + struct dsa_bridge bridge, bool *tx_fwd_offload, + struct netlink_ext_ack *extack) +{ + struct dsa_port *dp = dsa_to_port(ds, port), *other_dp; + struct dsa_port *cpu_dp = dp->cpu_dp; + u32 port_bitmap = BIT(cpu_dp->index); + struct mt7530_priv *priv = ds->priv; + + mutex_lock(&priv->reg_mutex); + + dsa_switch_for_each_user_port(other_dp, ds) { + int other_port = other_dp->index; + + if (dp == other_dp) + continue; + + /* 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 (!dsa_port_offloads_bridge(other_dp, &bridge)) + continue; + + if (priv->ports[other_port].enable) + mt7530_set(priv, MT7530_PCR_P(other_port), + PCR_MATRIX(BIT(port))); + priv->ports[other_port].pm |= PCR_MATRIX(BIT(port)); + + port_bitmap |= BIT(other_port); + } + + /* 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); + + /* Set to fallback mode for independent VLAN learning */ + mt7530_rmw(priv, MT7530_PCR_P(port), PCR_PORT_VLAN_MASK, + MT7530_PORT_FALLBACK_MODE); + + mutex_unlock(&priv->reg_mutex); + + return 0; +} + +static void +mt7530_port_set_vlan_unaware(struct dsa_switch *ds, int port) +{ + struct mt7530_priv *priv = ds->priv; + bool all_user_ports_removed = true; + int i; + + /* This is called after .port_bridge_leave when leaving a VLAN-aware + * bridge. Don't set standalone ports to fallback mode. + */ + if (dsa_port_bridge_dev_get(dsa_to_port(ds, port))) + mt7530_rmw(priv, MT7530_PCR_P(port), PCR_PORT_VLAN_MASK, + MT7530_PORT_FALLBACK_MODE); + + mt7530_rmw(priv, MT7530_PVC_P(port), + VLAN_ATTR_MASK | PVC_EG_TAG_MASK | ACC_FRM_MASK, + VLAN_ATTR(MT7530_VLAN_TRANSPARENT) | + PVC_EG_TAG(MT7530_VLAN_EG_CONSISTENT) | + MT7530_VLAN_ACC_ALL); + + /* Set PVID to 0 */ + mt7530_rmw(priv, MT7530_PPBV1_P(port), G0_PORT_VID_MASK, + G0_PORT_VID_DEF); + + for (i = 0; i < MT7530_NUM_PORTS; i++) { + if (dsa_is_user_port(ds, i) && + dsa_port_is_vlan_filtering(dsa_to_port(ds, i))) { + all_user_ports_removed = false; + break; + } + } + + /* CPU port also does the same thing until all user ports belonging to + * the CPU port get out of VLAN filtering mode. + */ + if (all_user_ports_removed) { + struct dsa_port *dp = dsa_to_port(ds, port); + struct dsa_port *cpu_dp = dp->cpu_dp; + + mt7530_write(priv, MT7530_PCR_P(cpu_dp->index), + PCR_MATRIX(dsa_user_ports(priv->ds))); + mt7530_write(priv, MT7530_PVC_P(cpu_dp->index), PORT_SPEC_TAG + | PVC_EG_TAG(MT7530_VLAN_EG_CONSISTENT)); + } +} + +static void +mt7530_port_set_vlan_aware(struct dsa_switch *ds, int port) +{ + struct mt7530_priv *priv = ds->priv; + + /* Trapped into security mode allows packet forwarding through VLAN + * table lookup. + */ + if (dsa_is_user_port(ds, port)) { + mt7530_rmw(priv, MT7530_PCR_P(port), PCR_PORT_VLAN_MASK, + MT7530_PORT_SECURITY_MODE); + mt7530_rmw(priv, MT7530_PPBV1_P(port), G0_PORT_VID_MASK, + G0_PORT_VID(priv->ports[port].pvid)); + + /* Only accept tagged frames if PVID is not set */ + if (!priv->ports[port].pvid) + mt7530_rmw(priv, MT7530_PVC_P(port), ACC_FRM_MASK, + MT7530_VLAN_ACC_TAGGED); + + /* Set the port as a user port which is to be able to recognize + * VID from incoming packets before fetching entry within the + * VLAN table. + */ + mt7530_rmw(priv, MT7530_PVC_P(port), + VLAN_ATTR_MASK | PVC_EG_TAG_MASK, + VLAN_ATTR(MT7530_VLAN_USER) | + PVC_EG_TAG(MT7530_VLAN_EG_DISABLED)); + } else { + /* Also set CPU ports to the "user" VLAN port attribute, to + * allow VLAN classification, but keep the EG_TAG attribute as + * "consistent" (i.o.w. don't change its value) for packets + * received by the switch from the CPU, so that tagged packets + * are forwarded to user ports as tagged, and untagged as + * untagged. + */ + mt7530_rmw(priv, MT7530_PVC_P(port), VLAN_ATTR_MASK, + VLAN_ATTR(MT7530_VLAN_USER)); + } +} + +static void +mt7530_port_bridge_leave(struct dsa_switch *ds, int port, + struct dsa_bridge bridge) +{ + struct dsa_port *dp = dsa_to_port(ds, port), *other_dp; + struct dsa_port *cpu_dp = dp->cpu_dp; + struct mt7530_priv *priv = ds->priv; + + mutex_lock(&priv->reg_mutex); + + dsa_switch_for_each_user_port(other_dp, ds) { + int other_port = other_dp->index; + + if (dp == other_dp) + continue; + + /* 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 (!dsa_port_offloads_bridge(other_dp, &bridge)) + continue; + + if (priv->ports[other_port].enable) + mt7530_clear(priv, MT7530_PCR_P(other_port), + PCR_MATRIX(BIT(port))); + priv->ports[other_port].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(cpu_dp->index))); + priv->ports[port].pm = PCR_MATRIX(BIT(cpu_dp->index)); + + /* When a port is removed from the bridge, the port would be set up + * back to the default as is at initial boot which is a VLAN-unaware + * port. + */ + mt7530_rmw(priv, MT7530_PCR_P(port), PCR_PORT_VLAN_MASK, + MT7530_PORT_MATRIX_MODE); + + mutex_unlock(&priv->reg_mutex); +} + +static int +mt7530_port_fdb_add(struct dsa_switch *ds, int port, + const unsigned char *addr, u16 vid, + struct dsa_db db) +{ + struct mt7530_priv *priv = ds->priv; + int ret; + u8 port_mask = BIT(port); + + mutex_lock(&priv->reg_mutex); + mt7530_fdb_write(priv, vid, port_mask, addr, -1, STATIC_ENT); + ret = mt7530_fdb_cmd(priv, MT7530_FDB_WRITE, NULL); + mutex_unlock(&priv->reg_mutex); + + return ret; +} + +static int +mt7530_port_fdb_del(struct dsa_switch *ds, int port, + const unsigned char *addr, u16 vid, + struct dsa_db db) +{ + struct mt7530_priv *priv = ds->priv; + int ret; + u8 port_mask = BIT(port); + + mutex_lock(&priv->reg_mutex); + mt7530_fdb_write(priv, vid, port_mask, addr, -1, STATIC_EMP); + ret = mt7530_fdb_cmd(priv, MT7530_FDB_WRITE, NULL); + mutex_unlock(&priv->reg_mutex); + + return ret; +} + +static int +mt7530_port_fdb_dump(struct dsa_switch *ds, int port, + dsa_fdb_dump_cb_t *cb, void *data) +{ + 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)) { + ret = cb(_fdb.mac, _fdb.vid, _fdb.noarp, + data); + 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 int +mt7530_port_mdb_add(struct dsa_switch *ds, int port, + const struct switchdev_obj_port_mdb *mdb, + struct dsa_db db) +{ + struct mt7530_priv *priv = ds->priv; + const u8 *addr = mdb->addr; + u16 vid = mdb->vid; + u8 port_mask = 0; + int ret; + + mutex_lock(&priv->reg_mutex); + + mt7530_fdb_write(priv, vid, 0, addr, 0, STATIC_EMP); + if (!mt7530_fdb_cmd(priv, MT7530_FDB_READ, NULL)) + port_mask = (mt7530_read(priv, MT7530_ATRD) >> PORT_MAP) + & PORT_MAP_MASK; + + port_mask |= BIT(port); + mt7530_fdb_write(priv, vid, port_mask, addr, -1, STATIC_ENT); + ret = mt7530_fdb_cmd(priv, MT7530_FDB_WRITE, NULL); + + mutex_unlock(&priv->reg_mutex); + + return ret; +} + +static int +mt7530_port_mdb_del(struct dsa_switch *ds, int port, + const struct switchdev_obj_port_mdb *mdb, + struct dsa_db db) +{ + struct mt7530_priv *priv = ds->priv; + const u8 *addr = mdb->addr; + u16 vid = mdb->vid; + u8 port_mask = 0; + int ret; + + mutex_lock(&priv->reg_mutex); + + mt7530_fdb_write(priv, vid, 0, addr, 0, STATIC_EMP); + if (!mt7530_fdb_cmd(priv, MT7530_FDB_READ, NULL)) + port_mask = (mt7530_read(priv, MT7530_ATRD) >> PORT_MAP) + & PORT_MAP_MASK; + + port_mask &= ~BIT(port); + mt7530_fdb_write(priv, vid, port_mask, addr, -1, + port_mask ? STATIC_ENT : STATIC_EMP); + ret = mt7530_fdb_cmd(priv, MT7530_FDB_WRITE, NULL); + + mutex_unlock(&priv->reg_mutex); + + return ret; +} + +static int +mt7530_vlan_cmd(struct mt7530_priv *priv, enum mt7530_vlan_cmd cmd, u16 vid) +{ + struct mt7530_dummy_poll p; + u32 val; + int ret; + + val = VTCR_BUSY | VTCR_FUNC(cmd) | vid; + mt7530_write(priv, MT7530_VTCR, val); + + INIT_MT7530_DUMMY_POLL(&p, priv, MT7530_VTCR); + ret = readx_poll_timeout(_mt7530_read, &p, val, + !(val & VTCR_BUSY), 20, 20000); + if (ret < 0) { + dev_err(priv->dev, "poll timeout\n"); + return ret; + } + + val = mt7530_read(priv, MT7530_VTCR); + if (val & VTCR_INVALID) { + dev_err(priv->dev, "read VTCR invalid\n"); + return -EINVAL; + } + + return 0; +} + +static int +mt7530_port_vlan_filtering(struct dsa_switch *ds, int port, bool vlan_filtering, + struct netlink_ext_ack *extack) +{ + struct dsa_port *dp = dsa_to_port(ds, port); + struct dsa_port *cpu_dp = dp->cpu_dp; + + if (vlan_filtering) { + /* The port is being kept as VLAN-unaware port when bridge is + * set up with vlan_filtering not being set, Otherwise, the + * port and the corresponding CPU port is required the setup + * for becoming a VLAN-aware port. + */ + mt7530_port_set_vlan_aware(ds, port); + mt7530_port_set_vlan_aware(ds, cpu_dp->index); + } else { + mt7530_port_set_vlan_unaware(ds, port); + } + + return 0; +} + +static void +mt7530_hw_vlan_add(struct mt7530_priv *priv, + struct mt7530_hw_vlan_entry *entry) +{ + struct dsa_port *dp = dsa_to_port(priv->ds, entry->port); + u8 new_members; + u32 val; + + new_members = entry->old_members | BIT(entry->port); + + /* Validate the entry with independent learning, create egress tag per + * VLAN and joining the port as one of the port members. + */ + val = IVL_MAC | VTAG_EN | PORT_MEM(new_members) | FID(FID_BRIDGED) | + VLAN_VALID; + mt7530_write(priv, MT7530_VAWD1, val); + + /* Decide whether adding tag or not for those outgoing packets from the + * port inside the VLAN. + * CPU port is always taken as a tagged port for serving more than one + * VLANs across and also being applied with egress type stack mode for + * that VLAN tags would be appended after hardware special tag used as + * DSA tag. + */ + if (dsa_port_is_cpu(dp)) + val = MT7530_VLAN_EGRESS_STACK; + else if (entry->untagged) + val = MT7530_VLAN_EGRESS_UNTAG; + else + val = MT7530_VLAN_EGRESS_TAG; + mt7530_rmw(priv, MT7530_VAWD2, + ETAG_CTRL_P_MASK(entry->port), + ETAG_CTRL_P(entry->port, val)); +} + +static void +mt7530_hw_vlan_del(struct mt7530_priv *priv, + struct mt7530_hw_vlan_entry *entry) +{ + u8 new_members; + u32 val; + + new_members = entry->old_members & ~BIT(entry->port); + + val = mt7530_read(priv, MT7530_VAWD1); + if (!(val & VLAN_VALID)) { + dev_err(priv->dev, + "Cannot be deleted due to invalid entry\n"); + return; + } + + if (new_members) { + val = IVL_MAC | VTAG_EN | PORT_MEM(new_members) | + VLAN_VALID; + mt7530_write(priv, MT7530_VAWD1, val); + } else { + mt7530_write(priv, MT7530_VAWD1, 0); + mt7530_write(priv, MT7530_VAWD2, 0); + } +} + +static void +mt7530_hw_vlan_update(struct mt7530_priv *priv, u16 vid, + struct mt7530_hw_vlan_entry *entry, + mt7530_vlan_op vlan_op) +{ + u32 val; + + /* Fetch entry */ + mt7530_vlan_cmd(priv, MT7530_VTCR_RD_VID, vid); + + val = mt7530_read(priv, MT7530_VAWD1); + + entry->old_members = (val >> PORT_MEM_SHFT) & PORT_MEM_MASK; + + /* Manipulate entry */ + vlan_op(priv, entry); + + /* Flush result to hardware */ + mt7530_vlan_cmd(priv, MT7530_VTCR_WR_VID, vid); +} + +static int +mt7530_setup_vlan0(struct mt7530_priv *priv) +{ + u32 val; + + /* Validate the entry with independent learning, keep the original + * ingress tag attribute. + */ + val = IVL_MAC | EG_CON | PORT_MEM(MT7530_ALL_MEMBERS) | FID(FID_BRIDGED) | + VLAN_VALID; + mt7530_write(priv, MT7530_VAWD1, val); + + return mt7530_vlan_cmd(priv, MT7530_VTCR_WR_VID, 0); +} + +static int +mt7530_port_vlan_add(struct dsa_switch *ds, int port, + const struct switchdev_obj_port_vlan *vlan, + struct netlink_ext_ack *extack) +{ + bool untagged = vlan->flags & BRIDGE_VLAN_INFO_UNTAGGED; + bool pvid = vlan->flags & BRIDGE_VLAN_INFO_PVID; + struct mt7530_hw_vlan_entry new_entry; + struct mt7530_priv *priv = ds->priv; + + mutex_lock(&priv->reg_mutex); + + mt7530_hw_vlan_entry_init(&new_entry, port, untagged); + mt7530_hw_vlan_update(priv, vlan->vid, &new_entry, mt7530_hw_vlan_add); + + if (pvid) { + priv->ports[port].pvid = vlan->vid; + + /* Accept all frames if PVID is set */ + mt7530_rmw(priv, MT7530_PVC_P(port), ACC_FRM_MASK, + MT7530_VLAN_ACC_ALL); + + /* Only configure PVID if VLAN filtering is enabled */ + if (dsa_port_is_vlan_filtering(dsa_to_port(ds, port))) + mt7530_rmw(priv, MT7530_PPBV1_P(port), + G0_PORT_VID_MASK, + G0_PORT_VID(vlan->vid)); + } else if (vlan->vid && priv->ports[port].pvid == vlan->vid) { + /* This VLAN is overwritten without PVID, so unset it */ + priv->ports[port].pvid = G0_PORT_VID_DEF; + + /* Only accept tagged frames if the port is VLAN-aware */ + if (dsa_port_is_vlan_filtering(dsa_to_port(ds, port))) + mt7530_rmw(priv, MT7530_PVC_P(port), ACC_FRM_MASK, + MT7530_VLAN_ACC_TAGGED); + + mt7530_rmw(priv, MT7530_PPBV1_P(port), G0_PORT_VID_MASK, + G0_PORT_VID_DEF); + } + + mutex_unlock(&priv->reg_mutex); + + return 0; +} + +static int +mt7530_port_vlan_del(struct dsa_switch *ds, int port, + const struct switchdev_obj_port_vlan *vlan) +{ + struct mt7530_hw_vlan_entry target_entry; + struct mt7530_priv *priv = ds->priv; + + mutex_lock(&priv->reg_mutex); + + mt7530_hw_vlan_entry_init(&target_entry, port, 0); + mt7530_hw_vlan_update(priv, vlan->vid, &target_entry, + mt7530_hw_vlan_del); + + /* PVID is being restored to the default whenever the PVID port + * is being removed from the VLAN. + */ + if (priv->ports[port].pvid == vlan->vid) { + priv->ports[port].pvid = G0_PORT_VID_DEF; + + /* Only accept tagged frames if the port is VLAN-aware */ + if (dsa_port_is_vlan_filtering(dsa_to_port(ds, port))) + mt7530_rmw(priv, MT7530_PVC_P(port), ACC_FRM_MASK, + MT7530_VLAN_ACC_TAGGED); + + mt7530_rmw(priv, MT7530_PPBV1_P(port), G0_PORT_VID_MASK, + G0_PORT_VID_DEF); + } + + + mutex_unlock(&priv->reg_mutex); + + return 0; +} + +static int mt753x_mirror_port_get(unsigned int id, u32 val) +{ + return (id == ID_MT7531) ? MT7531_MIRROR_PORT_GET(val) : + MIRROR_PORT(val); +} + +static int mt753x_mirror_port_set(unsigned int id, u32 val) +{ + return (id == ID_MT7531) ? MT7531_MIRROR_PORT_SET(val) : + MIRROR_PORT(val); +} + +static int mt753x_port_mirror_add(struct dsa_switch *ds, int port, + struct dsa_mall_mirror_tc_entry *mirror, + bool ingress, struct netlink_ext_ack *extack) +{ + struct mt7530_priv *priv = ds->priv; + int monitor_port; + u32 val; + + /* Check for existent entry */ + if ((ingress ? priv->mirror_rx : priv->mirror_tx) & BIT(port)) + return -EEXIST; + + val = mt7530_read(priv, MT753X_MIRROR_REG(priv->id)); + + /* MT7530 only supports one monitor port */ + monitor_port = mt753x_mirror_port_get(priv->id, val); + if (val & MT753X_MIRROR_EN(priv->id) && + monitor_port != mirror->to_local_port) + return -EEXIST; + + val |= MT753X_MIRROR_EN(priv->id); + val &= ~MT753X_MIRROR_MASK(priv->id); + val |= mt753x_mirror_port_set(priv->id, mirror->to_local_port); + mt7530_write(priv, MT753X_MIRROR_REG(priv->id), val); + + val = mt7530_read(priv, MT7530_PCR_P(port)); + if (ingress) { + val |= PORT_RX_MIR; + priv->mirror_rx |= BIT(port); + } else { + val |= PORT_TX_MIR; + priv->mirror_tx |= BIT(port); + } + mt7530_write(priv, MT7530_PCR_P(port), val); + + return 0; +} + +static void mt753x_port_mirror_del(struct dsa_switch *ds, int port, + struct dsa_mall_mirror_tc_entry *mirror) +{ + struct mt7530_priv *priv = ds->priv; + u32 val; + + val = mt7530_read(priv, MT7530_PCR_P(port)); + if (mirror->ingress) { + val &= ~PORT_RX_MIR; + priv->mirror_rx &= ~BIT(port); + } else { + val &= ~PORT_TX_MIR; + priv->mirror_tx &= ~BIT(port); + } + mt7530_write(priv, MT7530_PCR_P(port), val); + + if (!priv->mirror_rx && !priv->mirror_tx) { + val = mt7530_read(priv, MT753X_MIRROR_REG(priv->id)); + val &= ~MT753X_MIRROR_EN(priv->id); + mt7530_write(priv, MT753X_MIRROR_REG(priv->id), val); + } +} + +static enum dsa_tag_protocol +mtk_get_tag_protocol(struct dsa_switch *ds, int port, + enum dsa_tag_protocol mp) +{ + return DSA_TAG_PROTO_MTK; +} + +#ifdef CONFIG_GPIOLIB +static inline u32 +mt7530_gpio_to_bit(unsigned int offset) +{ + /* Map GPIO offset to register bit + * [ 2: 0] port 0 LED 0..2 as GPIO 0..2 + * [ 6: 4] port 1 LED 0..2 as GPIO 3..5 + * [10: 8] port 2 LED 0..2 as GPIO 6..8 + * [14:12] port 3 LED 0..2 as GPIO 9..11 + * [18:16] port 4 LED 0..2 as GPIO 12..14 + */ + return BIT(offset + offset / 3); +} + +static int +mt7530_gpio_get(struct gpio_chip *gc, unsigned int offset) +{ + struct mt7530_priv *priv = gpiochip_get_data(gc); + u32 bit = mt7530_gpio_to_bit(offset); + + return !!(mt7530_read(priv, MT7530_LED_GPIO_DATA) & bit); +} + +static void +mt7530_gpio_set(struct gpio_chip *gc, unsigned int offset, int value) +{ + struct mt7530_priv *priv = gpiochip_get_data(gc); + u32 bit = mt7530_gpio_to_bit(offset); + + if (value) + mt7530_set(priv, MT7530_LED_GPIO_DATA, bit); + else + mt7530_clear(priv, MT7530_LED_GPIO_DATA, bit); +} + +static int +mt7530_gpio_get_direction(struct gpio_chip *gc, unsigned int offset) +{ + struct mt7530_priv *priv = gpiochip_get_data(gc); + u32 bit = mt7530_gpio_to_bit(offset); + + return (mt7530_read(priv, MT7530_LED_GPIO_DIR) & bit) ? + GPIO_LINE_DIRECTION_OUT : GPIO_LINE_DIRECTION_IN; +} + +static int +mt7530_gpio_direction_input(struct gpio_chip *gc, unsigned int offset) +{ + struct mt7530_priv *priv = gpiochip_get_data(gc); + u32 bit = mt7530_gpio_to_bit(offset); + + mt7530_clear(priv, MT7530_LED_GPIO_OE, bit); + mt7530_clear(priv, MT7530_LED_GPIO_DIR, bit); + + return 0; +} + +static int +mt7530_gpio_direction_output(struct gpio_chip *gc, unsigned int offset, int value) +{ + struct mt7530_priv *priv = gpiochip_get_data(gc); + u32 bit = mt7530_gpio_to_bit(offset); + + mt7530_set(priv, MT7530_LED_GPIO_DIR, bit); + + if (value) + mt7530_set(priv, MT7530_LED_GPIO_DATA, bit); + else + mt7530_clear(priv, MT7530_LED_GPIO_DATA, bit); + + mt7530_set(priv, MT7530_LED_GPIO_OE, bit); + + return 0; +} + +static int +mt7530_setup_gpio(struct mt7530_priv *priv) +{ + struct device *dev = priv->dev; + struct gpio_chip *gc; + + gc = devm_kzalloc(dev, sizeof(*gc), GFP_KERNEL); + if (!gc) + return -ENOMEM; + + mt7530_write(priv, MT7530_LED_GPIO_OE, 0); + mt7530_write(priv, MT7530_LED_GPIO_DIR, 0); + mt7530_write(priv, MT7530_LED_IO_MODE, 0); + + gc->label = "mt7530"; + gc->parent = dev; + gc->owner = THIS_MODULE; + gc->get_direction = mt7530_gpio_get_direction; + gc->direction_input = mt7530_gpio_direction_input; + gc->direction_output = mt7530_gpio_direction_output; + gc->get = mt7530_gpio_get; + gc->set = mt7530_gpio_set; + gc->base = -1; + gc->ngpio = 15; + gc->can_sleep = true; + + return devm_gpiochip_add_data(dev, gc, priv); +} +#endif /* CONFIG_GPIOLIB */ + +static irqreturn_t +mt7530_irq_thread_fn(int irq, void *dev_id) +{ + struct mt7530_priv *priv = dev_id; + bool handled = false; + u32 val; + int p; + + mutex_lock_nested(&priv->bus->mdio_lock, MDIO_MUTEX_NESTED); + val = mt7530_mii_read(priv, MT7530_SYS_INT_STS); + mt7530_mii_write(priv, MT7530_SYS_INT_STS, val); + mutex_unlock(&priv->bus->mdio_lock); + + for (p = 0; p < MT7530_NUM_PHYS; p++) { + if (BIT(p) & val) { + unsigned int irq; + + irq = irq_find_mapping(priv->irq_domain, p); + handle_nested_irq(irq); + handled = true; + } + } + + return IRQ_RETVAL(handled); +} + +static void +mt7530_irq_mask(struct irq_data *d) +{ + struct mt7530_priv *priv = irq_data_get_irq_chip_data(d); + + priv->irq_enable &= ~BIT(d->hwirq); +} + +static void +mt7530_irq_unmask(struct irq_data *d) +{ + struct mt7530_priv *priv = irq_data_get_irq_chip_data(d); + + priv->irq_enable |= BIT(d->hwirq); +} + +static void +mt7530_irq_bus_lock(struct irq_data *d) +{ + struct mt7530_priv *priv = irq_data_get_irq_chip_data(d); + + mutex_lock_nested(&priv->bus->mdio_lock, MDIO_MUTEX_NESTED); +} + +static void +mt7530_irq_bus_sync_unlock(struct irq_data *d) +{ + struct mt7530_priv *priv = irq_data_get_irq_chip_data(d); + + mt7530_mii_write(priv, MT7530_SYS_INT_EN, priv->irq_enable); + mutex_unlock(&priv->bus->mdio_lock); +} + +static struct irq_chip mt7530_irq_chip = { + .name = KBUILD_MODNAME, + .irq_mask = mt7530_irq_mask, + .irq_unmask = mt7530_irq_unmask, + .irq_bus_lock = mt7530_irq_bus_lock, + .irq_bus_sync_unlock = mt7530_irq_bus_sync_unlock, +}; + +static int +mt7530_irq_map(struct irq_domain *domain, unsigned int irq, + irq_hw_number_t hwirq) +{ + irq_set_chip_data(irq, domain->host_data); + irq_set_chip_and_handler(irq, &mt7530_irq_chip, handle_simple_irq); + irq_set_nested_thread(irq, true); + irq_set_noprobe(irq); + + return 0; +} + +static const struct irq_domain_ops mt7530_irq_domain_ops = { + .map = mt7530_irq_map, + .xlate = irq_domain_xlate_onecell, +}; + +static void +mt7530_setup_mdio_irq(struct mt7530_priv *priv) +{ + struct dsa_switch *ds = priv->ds; + int p; + + for (p = 0; p < MT7530_NUM_PHYS; p++) { + if (BIT(p) & ds->phys_mii_mask) { + unsigned int irq; + + irq = irq_create_mapping(priv->irq_domain, p); + ds->slave_mii_bus->irq[p] = irq; + } + } +} + +static int +mt7530_setup_irq(struct mt7530_priv *priv) +{ + struct device *dev = priv->dev; + struct device_node *np = dev->of_node; + int ret; + + if (!of_property_read_bool(np, "interrupt-controller")) { + dev_info(dev, "no interrupt support\n"); + return 0; + } + + priv->irq = of_irq_get(np, 0); + if (priv->irq <= 0) { + dev_err(dev, "failed to get parent IRQ: %d\n", priv->irq); + return priv->irq ? : -EINVAL; + } + + priv->irq_domain = irq_domain_add_linear(np, MT7530_NUM_PHYS, + &mt7530_irq_domain_ops, priv); + if (!priv->irq_domain) { + dev_err(dev, "failed to create IRQ domain\n"); + return -ENOMEM; + } + + /* This register must be set for MT7530 to properly fire interrupts */ + if (priv->id != ID_MT7531) + mt7530_set(priv, MT7530_TOP_SIG_CTRL, TOP_SIG_CTRL_NORMAL); + + ret = request_threaded_irq(priv->irq, NULL, mt7530_irq_thread_fn, + IRQF_ONESHOT, KBUILD_MODNAME, priv); + if (ret) { + irq_domain_remove(priv->irq_domain); + dev_err(dev, "failed to request IRQ: %d\n", ret); + return ret; + } + + return 0; +} + +static void +mt7530_free_mdio_irq(struct mt7530_priv *priv) +{ + int p; + + for (p = 0; p < MT7530_NUM_PHYS; p++) { + if (BIT(p) & priv->ds->phys_mii_mask) { + unsigned int irq; + + irq = irq_find_mapping(priv->irq_domain, p); + irq_dispose_mapping(irq); + } + } +} + +static void +mt7530_free_irq_common(struct mt7530_priv *priv) +{ + free_irq(priv->irq, priv); + irq_domain_remove(priv->irq_domain); +} + +static void +mt7530_free_irq(struct mt7530_priv *priv) +{ + mt7530_free_mdio_irq(priv); + mt7530_free_irq_common(priv); +} + +static int +mt7530_setup_mdio(struct mt7530_priv *priv) +{ + struct dsa_switch *ds = priv->ds; + struct device *dev = priv->dev; + struct mii_bus *bus; + static int idx; + int ret; + + bus = devm_mdiobus_alloc(dev); + if (!bus) + return -ENOMEM; + + ds->slave_mii_bus = bus; + bus->priv = priv; + bus->name = KBUILD_MODNAME "-mii"; + snprintf(bus->id, MII_BUS_ID_SIZE, KBUILD_MODNAME "-%d", idx++); + bus->read = mt753x_phy_read; + bus->write = mt753x_phy_write; + bus->parent = dev; + bus->phy_mask = ~ds->phys_mii_mask; + + if (priv->irq) + mt7530_setup_mdio_irq(priv); + + ret = devm_mdiobus_register(dev, bus); + if (ret) { + dev_err(dev, "failed to register MDIO bus: %d\n", ret); + if (priv->irq) + mt7530_free_mdio_irq(priv); + } + + return ret; +} + +static int +mt7530_setup(struct dsa_switch *ds) +{ + struct mt7530_priv *priv = ds->priv; + struct device_node *dn = NULL; + struct device_node *phy_node; + struct device_node *mac_np; + struct mt7530_dummy_poll p; + phy_interface_t interface; + struct dsa_port *cpu_dp; + u32 id, val; + int ret, i; + + /* 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. + */ + dsa_switch_for_each_cpu_port(cpu_dp, ds) { + dn = cpu_dp->master->dev.of_node->parent; + /* It doesn't matter which CPU port is found first, + * their masters should share the same parent OF node + */ + break; + } + + if (!dn) { + dev_err(ds->dev, "parent OF node of DSA master not found"); + return -EINVAL; + } + + ds->assisted_learning_on_cpu_port = true; + ds->mtu_enforcement_ingress = true; + + if (priv->id == ID_MT7530) { + 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); + + mt7530_pll_setup(priv); + + /* 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)); + + for (i = 0; i < NUM_TRGMII_CTRL; i++) + mt7530_rmw(priv, MT7530_TRGMII_RD(i), + RD_TAP_MASK, RD_TAP(16)); + + /* Enable port 6 */ + val = mt7530_read(priv, MT7530_MHWTRAP); + val &= ~MHWTRAP_P6_DIS & ~MHWTRAP_PHY_ACCESS; + val |= MHWTRAP_MANUAL; + mt7530_write(priv, MT7530_MHWTRAP, val); + + priv->p6_interface = PHY_INTERFACE_MODE_NA; + + mt753x_trap_frames(priv); + + /* Enable and reset MIB counters */ + mt7530_mib_reset(ds); + + 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); + + /* Disable learning by default on all ports */ + mt7530_set(priv, MT7530_PSC_P(i), SA_DIS); + + if (dsa_is_cpu_port(ds, i)) { + ret = mt753x_cpu_port_enable(ds, i); + if (ret) + return ret; + } else { + mt7530_port_disable(ds, i); + + /* Set default PVID to 0 on all user ports */ + mt7530_rmw(priv, MT7530_PPBV1_P(i), G0_PORT_VID_MASK, + G0_PORT_VID_DEF); + } + /* Enable consistent egress tag */ + mt7530_rmw(priv, MT7530_PVC_P(i), PVC_EG_TAG_MASK, + PVC_EG_TAG(MT7530_VLAN_EG_CONSISTENT)); + } + + /* Setup VLAN ID 0 for VLAN-unaware bridges */ + ret = mt7530_setup_vlan0(priv); + if (ret) + return ret; + + /* Setup port 5 */ + priv->p5_intf_sel = P5_DISABLED; + interface = PHY_INTERFACE_MODE_NA; + + if (!dsa_is_unused_port(ds, 5)) { + priv->p5_intf_sel = P5_INTF_SEL_GMAC5; + ret = of_get_phy_mode(dsa_to_port(ds, 5)->dn, &interface); + if (ret && ret != -ENODEV) + return ret; + } else { + /* Scan the ethernet nodes. look for GMAC1, lookup used phy */ + for_each_child_of_node(dn, mac_np) { + if (!of_device_is_compatible(mac_np, + "mediatek,eth-mac")) + continue; + + ret = of_property_read_u32(mac_np, "reg", &id); + if (ret < 0 || id != 1) + continue; + + phy_node = of_parse_phandle(mac_np, "phy-handle", 0); + if (!phy_node) + continue; + + if (phy_node->parent == priv->dev->of_node->parent) { + ret = of_get_phy_mode(mac_np, &interface); + if (ret && ret != -ENODEV) { + of_node_put(mac_np); + of_node_put(phy_node); + return ret; + } + id = of_mdio_parse_addr(ds->dev, phy_node); + if (id == 0) + priv->p5_intf_sel = P5_INTF_SEL_PHY_P0; + if (id == 4) + priv->p5_intf_sel = P5_INTF_SEL_PHY_P4; + } + of_node_put(mac_np); + of_node_put(phy_node); + break; + } + } + +#ifdef CONFIG_GPIOLIB + if (of_property_read_bool(priv->dev->of_node, "gpio-controller")) { + ret = mt7530_setup_gpio(priv); + if (ret) + return ret; + } +#endif /* CONFIG_GPIOLIB */ + + mt7530_setup_port5(ds, interface); + + /* Flush the FDB table */ + ret = mt7530_fdb_cmd(priv, MT7530_FDB_FLUSH, NULL); + if (ret < 0) + return ret; + + return 0; +} + +static int +mt7531_setup_common(struct dsa_switch *ds) +{ + struct mt7530_priv *priv = ds->priv; + struct dsa_port *cpu_dp; + int ret, i; + + /* BPDU to CPU port */ + dsa_switch_for_each_cpu_port(cpu_dp, ds) { + mt7530_rmw(priv, MT7531_CFC, MT7531_CPU_PMAP_MASK, + BIT(cpu_dp->index)); + break; + } + + mt753x_trap_frames(priv); + + /* Enable and reset MIB counters */ + mt7530_mib_reset(ds); + + /* Disable flooding on all ports */ + mt7530_clear(priv, MT7530_MFC, BC_FFP_MASK | UNM_FFP_MASK | + 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); + + /* Disable learning by default on all ports */ + mt7530_set(priv, MT7530_PSC_P(i), SA_DIS); + + mt7530_set(priv, MT7531_DBG_CNT(i), MT7531_DIS_CLR); + + if (dsa_is_cpu_port(ds, i)) { + ret = mt753x_cpu_port_enable(ds, i); + if (ret) + return ret; + } else { + mt7530_port_disable(ds, i); + + /* Set default PVID to 0 on all user ports */ + mt7530_rmw(priv, MT7530_PPBV1_P(i), G0_PORT_VID_MASK, + G0_PORT_VID_DEF); + } + + /* Enable consistent egress tag */ + mt7530_rmw(priv, MT7530_PVC_P(i), PVC_EG_TAG_MASK, + PVC_EG_TAG(MT7530_VLAN_EG_CONSISTENT)); + } + + /* Flush the FDB table */ + ret = mt7530_fdb_cmd(priv, MT7530_FDB_FLUSH, NULL); + if (ret < 0) + return ret; + + return 0; +} + +static int +mt7531_setup(struct dsa_switch *ds) +{ + struct mt7530_priv *priv = ds->priv; + struct mt7530_dummy_poll p; + u32 val, id; + int ret, i; + + /* 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, MT7531_CREV); + id >>= CHIP_NAME_SHIFT; + + if (id != MT7531_ID) { + dev_err(priv->dev, "chip %x can't be supported\n", id); + return -ENODEV; + } + + /* all MACs must be forced link-down before sw reset */ + for (i = 0; i < MT7530_NUM_PORTS; i++) + mt7530_write(priv, MT7530_PMCR_P(i), MT7531_FORCE_LNK); + + /* Reset the switch through internal reset */ + mt7530_write(priv, MT7530_SYS_CTRL, + SYS_CTRL_PHY_RST | SYS_CTRL_SW_RST | + SYS_CTRL_REG_RST); + + mt7531_pll_setup(priv); + + if (mt7531_dual_sgmii_supported(priv)) { + priv->p5_intf_sel = P5_INTF_SEL_GMAC5_SGMII; + + /* Let ds->slave_mii_bus be able to access external phy. */ + mt7530_rmw(priv, MT7531_GPIO_MODE1, MT7531_GPIO11_RG_RXD2_MASK, + MT7531_EXT_P_MDC_11); + mt7530_rmw(priv, MT7531_GPIO_MODE1, MT7531_GPIO12_RG_RXD3_MASK, + MT7531_EXT_P_MDIO_12); + } else { + priv->p5_intf_sel = P5_INTF_SEL_GMAC5; + } + dev_dbg(ds->dev, "P5 support %s interface\n", + p5_intf_modes(priv->p5_intf_sel)); + + mt7530_rmw(priv, MT7531_GPIO_MODE0, MT7531_GPIO0_MASK, + MT7531_GPIO0_INTERRUPT); + + /* Let phylink decide the interface later. */ + priv->p5_interface = PHY_INTERFACE_MODE_NA; + priv->p6_interface = PHY_INTERFACE_MODE_NA; + + /* Enable PHY core PLL, since phy_device has not yet been created + * provided for phy_[read,write]_mmd_indirect is called, we provide + * our own mt7531_ind_mmd_phy_[read,write] to complete this + * function. + */ + val = mt7531_ind_c45_phy_read(priv, MT753X_CTRL_PHY_ADDR, + MDIO_MMD_VEND2, CORE_PLL_GROUP4); + val |= MT7531_PHY_PLL_BYPASS_MODE; + val &= ~MT7531_PHY_PLL_OFF; + mt7531_ind_c45_phy_write(priv, MT753X_CTRL_PHY_ADDR, MDIO_MMD_VEND2, + CORE_PLL_GROUP4, val); + + mt7531_setup_common(ds); + + /* Setup VLAN ID 0 for VLAN-unaware bridges */ + ret = mt7530_setup_vlan0(priv); + if (ret) + return ret; + + ds->assisted_learning_on_cpu_port = true; + ds->mtu_enforcement_ingress = true; + + return 0; +} + +static void mt7530_mac_port_get_caps(struct dsa_switch *ds, int port, + struct phylink_config *config) +{ + switch (port) { + case 0 ... 4: /* Internal phy */ + __set_bit(PHY_INTERFACE_MODE_GMII, + config->supported_interfaces); + break; + + case 5: /* 2nd cpu port with phy of port 0 or 4 / external phy */ + phy_interface_set_rgmii(config->supported_interfaces); + __set_bit(PHY_INTERFACE_MODE_MII, + config->supported_interfaces); + __set_bit(PHY_INTERFACE_MODE_GMII, + config->supported_interfaces); + break; + + case 6: /* 1st cpu port */ + __set_bit(PHY_INTERFACE_MODE_RGMII, + config->supported_interfaces); + __set_bit(PHY_INTERFACE_MODE_TRGMII, + config->supported_interfaces); + break; + } +} + +static bool mt7531_is_rgmii_port(struct mt7530_priv *priv, u32 port) +{ + return (port == 5) && (priv->p5_intf_sel != P5_INTF_SEL_GMAC5_SGMII); +} + +static void mt7531_mac_port_get_caps(struct dsa_switch *ds, int port, + struct phylink_config *config) +{ + struct mt7530_priv *priv = ds->priv; + + switch (port) { + case 0 ... 4: /* Internal phy */ + __set_bit(PHY_INTERFACE_MODE_GMII, + config->supported_interfaces); + break; + + case 5: /* 2nd cpu port supports either rgmii or sgmii/8023z */ + if (mt7531_is_rgmii_port(priv, port)) { + phy_interface_set_rgmii(config->supported_interfaces); + break; + } + fallthrough; + + case 6: /* 1st cpu port supports sgmii/8023z only */ + __set_bit(PHY_INTERFACE_MODE_SGMII, + config->supported_interfaces); + __set_bit(PHY_INTERFACE_MODE_1000BASEX, + config->supported_interfaces); + __set_bit(PHY_INTERFACE_MODE_2500BASEX, + config->supported_interfaces); + + config->mac_capabilities |= MAC_2500FD; + break; + } +} + +static int +mt753x_pad_setup(struct dsa_switch *ds, const struct phylink_link_state *state) +{ + struct mt7530_priv *priv = ds->priv; + + return priv->info->pad_setup(ds, state->interface); +} + +static int +mt7530_mac_config(struct dsa_switch *ds, int port, unsigned int mode, + phy_interface_t interface) +{ + struct mt7530_priv *priv = ds->priv; + + /* Only need to setup port5. */ + if (port != 5) + return 0; + + mt7530_setup_port5(priv->ds, interface); + + return 0; +} + +static int mt7531_rgmii_setup(struct mt7530_priv *priv, u32 port, + phy_interface_t interface, + struct phy_device *phydev) +{ + u32 val; + + if (!mt7531_is_rgmii_port(priv, port)) { + dev_err(priv->dev, "RGMII mode is not available for port %d\n", + port); + return -EINVAL; + } + + val = mt7530_read(priv, MT7531_CLKGEN_CTRL); + val |= GP_CLK_EN; + val &= ~GP_MODE_MASK; + val |= GP_MODE(MT7531_GP_MODE_RGMII); + val &= ~CLK_SKEW_IN_MASK; + val |= CLK_SKEW_IN(MT7531_CLK_SKEW_NO_CHG); + val &= ~CLK_SKEW_OUT_MASK; + val |= CLK_SKEW_OUT(MT7531_CLK_SKEW_NO_CHG); + val |= TXCLK_NO_REVERSE | RXCLK_NO_DELAY; + + /* Do not adjust rgmii delay when vendor phy driver presents. */ + if (!phydev || phy_driver_is_genphy(phydev)) { + val &= ~(TXCLK_NO_REVERSE | RXCLK_NO_DELAY); + switch (interface) { + case PHY_INTERFACE_MODE_RGMII: + val |= TXCLK_NO_REVERSE; + val |= RXCLK_NO_DELAY; + break; + case PHY_INTERFACE_MODE_RGMII_RXID: + val |= TXCLK_NO_REVERSE; + break; + case PHY_INTERFACE_MODE_RGMII_TXID: + val |= RXCLK_NO_DELAY; + break; + case PHY_INTERFACE_MODE_RGMII_ID: + break; + default: + return -EINVAL; + } + } + mt7530_write(priv, MT7531_CLKGEN_CTRL, val); + + return 0; +} + +static void mt7531_pcs_link_up(struct phylink_pcs *pcs, unsigned int mode, + phy_interface_t interface, int speed, int duplex) +{ + struct mt7530_priv *priv = pcs_to_mt753x_pcs(pcs)->priv; + int port = pcs_to_mt753x_pcs(pcs)->port; + unsigned int val; + + /* For adjusting speed and duplex of SGMII force mode. */ + if (interface != PHY_INTERFACE_MODE_SGMII || + phylink_autoneg_inband(mode)) + return; + + /* SGMII force mode setting */ + val = mt7530_read(priv, MT7531_SGMII_MODE(port)); + val &= ~MT7531_SGMII_IF_MODE_MASK; + + switch (speed) { + case SPEED_10: + val |= MT7531_SGMII_FORCE_SPEED_10; + break; + case SPEED_100: + val |= MT7531_SGMII_FORCE_SPEED_100; + break; + case SPEED_1000: + val |= MT7531_SGMII_FORCE_SPEED_1000; + break; + } + + /* MT7531 SGMII 1G force mode can only work in full duplex mode, + * no matter MT7531_SGMII_FORCE_HALF_DUPLEX is set or not. + * + * The speed check is unnecessary as the MAC capabilities apply + * this restriction. --rmk + */ + if ((speed == SPEED_10 || speed == SPEED_100) && + duplex != DUPLEX_FULL) + val |= MT7531_SGMII_FORCE_HALF_DUPLEX; + + mt7530_write(priv, MT7531_SGMII_MODE(port), val); +} + +static bool mt753x_is_mac_port(u32 port) +{ + return (port == 5 || port == 6); +} + +static int mt7531_sgmii_setup_mode_force(struct mt7530_priv *priv, u32 port, + phy_interface_t interface) +{ + u32 val; + + if (!mt753x_is_mac_port(port)) + return -EINVAL; + + mt7530_set(priv, MT7531_QPHY_PWR_STATE_CTRL(port), + MT7531_SGMII_PHYA_PWD); + + val = mt7530_read(priv, MT7531_PHYA_CTRL_SIGNAL3(port)); + val &= ~MT7531_RG_TPHY_SPEED_MASK; + /* Setup 2.5 times faster clock for 2.5Gbps data speeds with 10B/8B + * encoding. + */ + val |= (interface == PHY_INTERFACE_MODE_2500BASEX) ? + MT7531_RG_TPHY_SPEED_3_125G : MT7531_RG_TPHY_SPEED_1_25G; + mt7530_write(priv, MT7531_PHYA_CTRL_SIGNAL3(port), val); + + mt7530_clear(priv, MT7531_PCS_CONTROL_1(port), MT7531_SGMII_AN_ENABLE); + + /* MT7531 SGMII 1G and 2.5G force mode can only work in full duplex + * mode, no matter MT7531_SGMII_FORCE_HALF_DUPLEX is set or not. + */ + mt7530_rmw(priv, MT7531_SGMII_MODE(port), + MT7531_SGMII_IF_MODE_MASK | MT7531_SGMII_REMOTE_FAULT_DIS, + MT7531_SGMII_FORCE_SPEED_1000); + + mt7530_write(priv, MT7531_QPHY_PWR_STATE_CTRL(port), 0); + + return 0; +} + +static int mt7531_sgmii_setup_mode_an(struct mt7530_priv *priv, int port, + phy_interface_t interface) +{ + if (!mt753x_is_mac_port(port)) + return -EINVAL; + + mt7530_set(priv, MT7531_QPHY_PWR_STATE_CTRL(port), + MT7531_SGMII_PHYA_PWD); + + mt7530_rmw(priv, MT7531_PHYA_CTRL_SIGNAL3(port), + MT7531_RG_TPHY_SPEED_MASK, MT7531_RG_TPHY_SPEED_1_25G); + + mt7530_set(priv, MT7531_SGMII_MODE(port), + MT7531_SGMII_REMOTE_FAULT_DIS | + MT7531_SGMII_SPEED_DUPLEX_AN); + + mt7530_rmw(priv, MT7531_PCS_SPEED_ABILITY(port), + MT7531_SGMII_TX_CONFIG_MASK, 1); + + mt7530_set(priv, MT7531_PCS_CONTROL_1(port), MT7531_SGMII_AN_ENABLE); + + mt7530_set(priv, MT7531_PCS_CONTROL_1(port), MT7531_SGMII_AN_RESTART); + + mt7530_write(priv, MT7531_QPHY_PWR_STATE_CTRL(port), 0); + + return 0; +} + +static void mt7531_pcs_an_restart(struct phylink_pcs *pcs) +{ + struct mt7530_priv *priv = pcs_to_mt753x_pcs(pcs)->priv; + int port = pcs_to_mt753x_pcs(pcs)->port; + u32 val; + + /* Only restart AN when AN is enabled */ + val = mt7530_read(priv, MT7531_PCS_CONTROL_1(port)); + if (val & MT7531_SGMII_AN_ENABLE) { + val |= MT7531_SGMII_AN_RESTART; + mt7530_write(priv, MT7531_PCS_CONTROL_1(port), val); + } +} + +static int +mt7531_mac_config(struct dsa_switch *ds, int port, unsigned int mode, + phy_interface_t interface) +{ + struct mt7530_priv *priv = ds->priv; + struct phy_device *phydev; + struct dsa_port *dp; + + if (!mt753x_is_mac_port(port)) { + dev_err(priv->dev, "port %d is not a MAC port\n", port); + return -EINVAL; + } + + switch (interface) { + case PHY_INTERFACE_MODE_RGMII: + case PHY_INTERFACE_MODE_RGMII_ID: + case PHY_INTERFACE_MODE_RGMII_RXID: + case PHY_INTERFACE_MODE_RGMII_TXID: + dp = dsa_to_port(ds, port); + phydev = dp->slave->phydev; + return mt7531_rgmii_setup(priv, port, interface, phydev); + case PHY_INTERFACE_MODE_SGMII: + return mt7531_sgmii_setup_mode_an(priv, port, interface); + case PHY_INTERFACE_MODE_NA: + case PHY_INTERFACE_MODE_1000BASEX: + case PHY_INTERFACE_MODE_2500BASEX: + return mt7531_sgmii_setup_mode_force(priv, port, interface); + default: + return -EINVAL; + } + + return -EINVAL; +} + +static int +mt753x_mac_config(struct dsa_switch *ds, int port, unsigned int mode, + const struct phylink_link_state *state) +{ + struct mt7530_priv *priv = ds->priv; + + return priv->info->mac_port_config(ds, port, mode, state->interface); +} + +static struct phylink_pcs * +mt753x_phylink_mac_select_pcs(struct dsa_switch *ds, int port, + phy_interface_t interface) +{ + struct mt7530_priv *priv = ds->priv; + + switch (interface) { + case PHY_INTERFACE_MODE_TRGMII: + case PHY_INTERFACE_MODE_SGMII: + case PHY_INTERFACE_MODE_1000BASEX: + case PHY_INTERFACE_MODE_2500BASEX: + return &priv->pcs[port].pcs; + + default: + return NULL; + } +} + +static void +mt753x_phylink_mac_config(struct dsa_switch *ds, int port, unsigned int mode, + const struct phylink_link_state *state) +{ + struct mt7530_priv *priv = ds->priv; + u32 mcr_cur, mcr_new; + + switch (port) { + case 0 ... 4: /* Internal phy */ + if (state->interface != PHY_INTERFACE_MODE_GMII) + goto unsupported; + break; + case 5: /* 2nd cpu port with phy of port 0 or 4 / external phy */ + if (priv->p5_interface == state->interface) + break; + + if (mt753x_mac_config(ds, port, mode, state) < 0) + goto unsupported; + + if (priv->p5_intf_sel != P5_DISABLED) + priv->p5_interface = state->interface; + break; + case 6: /* 1st cpu port */ + if (priv->p6_interface == state->interface) + break; + + mt753x_pad_setup(ds, state); + + if (mt753x_mac_config(ds, port, mode, state) < 0) + goto unsupported; + + priv->p6_interface = state->interface; + break; + default: +unsupported: + dev_err(ds->dev, "%s: unsupported %s port: %i\n", + __func__, phy_modes(state->interface), port); + return; + } + + mcr_cur = mt7530_read(priv, MT7530_PMCR_P(port)); + mcr_new = mcr_cur; + mcr_new &= ~PMCR_LINK_SETTINGS_MASK; + mcr_new |= PMCR_IFG_XMIT(1) | PMCR_MAC_MODE | PMCR_BACKOFF_EN | + PMCR_BACKPR_EN | PMCR_FORCE_MODE_ID(priv->id); + + /* Are we connected to external phy */ + if (port == 5 && dsa_is_user_port(ds, 5)) + mcr_new |= PMCR_EXT_PHY; + + if (mcr_new != mcr_cur) + mt7530_write(priv, MT7530_PMCR_P(port), mcr_new); +} + +static void mt753x_phylink_mac_link_down(struct dsa_switch *ds, int port, + unsigned int mode, + phy_interface_t interface) +{ + struct mt7530_priv *priv = ds->priv; + + mt7530_clear(priv, MT7530_PMCR_P(port), PMCR_LINK_SETTINGS_MASK); +} + +static void mt753x_phylink_pcs_link_up(struct phylink_pcs *pcs, + unsigned int mode, + phy_interface_t interface, + int speed, int duplex) +{ + if (pcs->ops->pcs_link_up) + pcs->ops->pcs_link_up(pcs, mode, interface, speed, duplex); +} + +static void mt753x_phylink_mac_link_up(struct dsa_switch *ds, int port, + unsigned int mode, + phy_interface_t interface, + struct phy_device *phydev, + int speed, int duplex, + bool tx_pause, bool rx_pause) +{ + struct mt7530_priv *priv = ds->priv; + u32 mcr; + + mcr = PMCR_RX_EN | PMCR_TX_EN | PMCR_FORCE_LNK; + + /* MT753x MAC works in 1G full duplex mode for all up-clocked + * variants. + */ + if (interface == PHY_INTERFACE_MODE_TRGMII || + (phy_interface_mode_is_8023z(interface))) { + speed = SPEED_1000; + duplex = DUPLEX_FULL; + } + + switch (speed) { + case SPEED_1000: + mcr |= PMCR_FORCE_SPEED_1000; + break; + case SPEED_100: + mcr |= PMCR_FORCE_SPEED_100; + break; + } + if (duplex == DUPLEX_FULL) { + mcr |= PMCR_FORCE_FDX; + if (tx_pause) + mcr |= PMCR_TX_FC_EN; + if (rx_pause) + mcr |= PMCR_RX_FC_EN; + } + + if (mode == MLO_AN_PHY && phydev && phy_init_eee(phydev, false) >= 0) { + switch (speed) { + case SPEED_1000: + mcr |= PMCR_FORCE_EEE1G; + break; + case SPEED_100: + mcr |= PMCR_FORCE_EEE100; + break; + } + } + + mt7530_set(priv, MT7530_PMCR_P(port), mcr); +} + +static int +mt7531_cpu_port_config(struct dsa_switch *ds, int port) +{ + struct mt7530_priv *priv = ds->priv; + phy_interface_t interface; + int speed; + int ret; + + switch (port) { + case 5: + if (mt7531_is_rgmii_port(priv, port)) + interface = PHY_INTERFACE_MODE_RGMII; + else + interface = PHY_INTERFACE_MODE_2500BASEX; + + priv->p5_interface = interface; + break; + case 6: + interface = PHY_INTERFACE_MODE_2500BASEX; + + priv->p6_interface = interface; + break; + default: + return -EINVAL; + } + + if (interface == PHY_INTERFACE_MODE_2500BASEX) + speed = SPEED_2500; + else + speed = SPEED_1000; + + ret = mt7531_mac_config(ds, port, MLO_AN_FIXED, interface); + if (ret) + return ret; + mt7530_write(priv, MT7530_PMCR_P(port), + PMCR_CPU_PORT_SETTING(priv->id)); + mt753x_phylink_pcs_link_up(&priv->pcs[port].pcs, MLO_AN_FIXED, + interface, speed, DUPLEX_FULL); + mt753x_phylink_mac_link_up(ds, port, MLO_AN_FIXED, interface, NULL, + speed, DUPLEX_FULL, true, true); + + return 0; +} + +static void mt753x_phylink_get_caps(struct dsa_switch *ds, int port, + struct phylink_config *config) +{ + struct mt7530_priv *priv = ds->priv; + + /* This switch only supports full-duplex at 1Gbps */ + config->mac_capabilities = MAC_ASYM_PAUSE | MAC_SYM_PAUSE | + MAC_10 | MAC_100 | MAC_1000FD; + + if ((priv->id == ID_MT7531) && mt753x_is_mac_port(port)) + config->mac_capabilities |= MAC_2500FD; + + /* This driver does not make use of the speed, duplex, pause or the + * advertisement in its mac_config, so it is safe to mark this driver + * as non-legacy. + */ + config->legacy_pre_march2020 = false; + + priv->info->mac_port_get_caps(ds, port, config); +} + +static int mt753x_pcs_validate(struct phylink_pcs *pcs, + unsigned long *supported, + const struct phylink_link_state *state) +{ + /* Autonegotiation is not supported in TRGMII nor 802.3z modes */ + if (state->interface == PHY_INTERFACE_MODE_TRGMII || + phy_interface_mode_is_8023z(state->interface)) + phylink_clear(supported, Autoneg); + + return 0; +} + +static void mt7530_pcs_get_state(struct phylink_pcs *pcs, + struct phylink_link_state *state) +{ + struct mt7530_priv *priv = pcs_to_mt753x_pcs(pcs)->priv; + int port = pcs_to_mt753x_pcs(pcs)->port; + u32 pmsr; + + pmsr = mt7530_read(priv, MT7530_PMSR_P(port)); + + state->link = (pmsr & PMSR_LINK); + state->an_complete = state->link; + state->duplex = !!(pmsr & PMSR_DPX); + + switch (pmsr & PMSR_SPEED_MASK) { + case PMSR_SPEED_10: + state->speed = SPEED_10; + break; + case PMSR_SPEED_100: + state->speed = SPEED_100; + break; + case PMSR_SPEED_1000: + state->speed = SPEED_1000; + break; + default: + state->speed = SPEED_UNKNOWN; + break; + } + + state->pause &= ~(MLO_PAUSE_RX | MLO_PAUSE_TX); + if (pmsr & PMSR_RX_FC) + state->pause |= MLO_PAUSE_RX; + if (pmsr & PMSR_TX_FC) + state->pause |= MLO_PAUSE_TX; +} + +static int +mt7531_sgmii_pcs_get_state_an(struct mt7530_priv *priv, int port, + struct phylink_link_state *state) +{ + u32 status, val; + u16 config_reg; + + status = mt7530_read(priv, MT7531_PCS_CONTROL_1(port)); + state->link = !!(status & MT7531_SGMII_LINK_STATUS); + state->an_complete = !!(status & MT7531_SGMII_AN_COMPLETE); + if (state->interface == PHY_INTERFACE_MODE_SGMII && + (status & MT7531_SGMII_AN_ENABLE)) { + val = mt7530_read(priv, MT7531_PCS_SPEED_ABILITY(port)); + config_reg = val >> 16; + + switch (config_reg & LPA_SGMII_SPD_MASK) { + case LPA_SGMII_1000: + state->speed = SPEED_1000; + break; + case LPA_SGMII_100: + state->speed = SPEED_100; + break; + case LPA_SGMII_10: + state->speed = SPEED_10; + break; + default: + dev_err(priv->dev, "invalid sgmii PHY speed\n"); + state->link = false; + return -EINVAL; + } + + if (config_reg & LPA_SGMII_FULL_DUPLEX) + state->duplex = DUPLEX_FULL; + else + state->duplex = DUPLEX_HALF; + } + + return 0; +} + +static void +mt7531_sgmii_pcs_get_state_inband(struct mt7530_priv *priv, int port, + struct phylink_link_state *state) +{ + unsigned int val; + + val = mt7530_read(priv, MT7531_PCS_CONTROL_1(port)); + state->link = !!(val & MT7531_SGMII_LINK_STATUS); + if (!state->link) + return; + + state->an_complete = state->link; + + if (state->interface == PHY_INTERFACE_MODE_2500BASEX) + state->speed = SPEED_2500; + else + state->speed = SPEED_1000; + + state->duplex = DUPLEX_FULL; + state->pause = MLO_PAUSE_NONE; +} + +static void mt7531_pcs_get_state(struct phylink_pcs *pcs, + struct phylink_link_state *state) +{ + struct mt7530_priv *priv = pcs_to_mt753x_pcs(pcs)->priv; + int port = pcs_to_mt753x_pcs(pcs)->port; + + if (state->interface == PHY_INTERFACE_MODE_SGMII) { + mt7531_sgmii_pcs_get_state_an(priv, port, state); + return; + } else if ((state->interface == PHY_INTERFACE_MODE_1000BASEX) || + (state->interface == PHY_INTERFACE_MODE_2500BASEX)) { + mt7531_sgmii_pcs_get_state_inband(priv, port, state); + return; + } + + state->link = false; +} + +static int mt753x_pcs_config(struct phylink_pcs *pcs, unsigned int mode, + phy_interface_t interface, + const unsigned long *advertising, + bool permit_pause_to_mac) +{ + return 0; +} + +static void mt7530_pcs_an_restart(struct phylink_pcs *pcs) +{ +} + +static const struct phylink_pcs_ops mt7530_pcs_ops = { + .pcs_validate = mt753x_pcs_validate, + .pcs_get_state = mt7530_pcs_get_state, + .pcs_config = mt753x_pcs_config, + .pcs_an_restart = mt7530_pcs_an_restart, +}; + +static const struct phylink_pcs_ops mt7531_pcs_ops = { + .pcs_validate = mt753x_pcs_validate, + .pcs_get_state = mt7531_pcs_get_state, + .pcs_config = mt753x_pcs_config, + .pcs_an_restart = mt7531_pcs_an_restart, + .pcs_link_up = mt7531_pcs_link_up, +}; + +static int +mt753x_setup(struct dsa_switch *ds) +{ + struct mt7530_priv *priv = ds->priv; + int i, ret; + + /* Initialise the PCS devices */ + for (i = 0; i < priv->ds->num_ports; i++) { + priv->pcs[i].pcs.ops = priv->info->pcs_ops; + priv->pcs[i].priv = priv; + priv->pcs[i].port = i; + if (mt753x_is_mac_port(i)) + priv->pcs[i].pcs.poll = 1; + } + + ret = priv->info->sw_setup(ds); + if (ret) + return ret; + + ret = mt7530_setup_irq(priv); + if (ret) + return ret; + + ret = mt7530_setup_mdio(priv); + if (ret && priv->irq) + mt7530_free_irq_common(priv); + + return ret; +} + +static int mt753x_get_mac_eee(struct dsa_switch *ds, int port, + struct ethtool_eee *e) +{ + struct mt7530_priv *priv = ds->priv; + u32 eeecr = mt7530_read(priv, MT7530_PMEEECR_P(port)); + + e->tx_lpi_enabled = !(eeecr & LPI_MODE_EN); + e->tx_lpi_timer = GET_LPI_THRESH(eeecr); + + return 0; +} + +static int mt753x_set_mac_eee(struct dsa_switch *ds, int port, + struct ethtool_eee *e) +{ + struct mt7530_priv *priv = ds->priv; + u32 set, mask = LPI_THRESH_MASK | LPI_MODE_EN; + + if (e->tx_lpi_timer > 0xFFF) + return -EINVAL; + + set = SET_LPI_THRESH(e->tx_lpi_timer); + if (!e->tx_lpi_enabled) + /* Force LPI Mode without a delay */ + set |= LPI_MODE_EN; + mt7530_rmw(priv, MT7530_PMEEECR_P(port), mask, set); + + return 0; +} + +static const struct dsa_switch_ops mt7530_switch_ops = { + .get_tag_protocol = mtk_get_tag_protocol, + .setup = mt753x_setup, + .get_strings = mt7530_get_strings, + .get_ethtool_stats = mt7530_get_ethtool_stats, + .get_sset_count = mt7530_get_sset_count, + .set_ageing_time = mt7530_set_ageing_time, + .port_enable = mt7530_port_enable, + .port_disable = mt7530_port_disable, + .port_change_mtu = mt7530_port_change_mtu, + .port_max_mtu = mt7530_port_max_mtu, + .port_stp_state_set = mt7530_stp_state_set, + .port_pre_bridge_flags = mt7530_port_pre_bridge_flags, + .port_bridge_flags = mt7530_port_bridge_flags, + .port_bridge_join = mt7530_port_bridge_join, + .port_bridge_leave = mt7530_port_bridge_leave, + .port_fdb_add = mt7530_port_fdb_add, + .port_fdb_del = mt7530_port_fdb_del, + .port_fdb_dump = mt7530_port_fdb_dump, + .port_mdb_add = mt7530_port_mdb_add, + .port_mdb_del = mt7530_port_mdb_del, + .port_vlan_filtering = mt7530_port_vlan_filtering, + .port_vlan_add = mt7530_port_vlan_add, + .port_vlan_del = mt7530_port_vlan_del, + .port_mirror_add = mt753x_port_mirror_add, + .port_mirror_del = mt753x_port_mirror_del, + .phylink_get_caps = mt753x_phylink_get_caps, + .phylink_mac_select_pcs = mt753x_phylink_mac_select_pcs, + .phylink_mac_config = mt753x_phylink_mac_config, + .phylink_mac_link_down = mt753x_phylink_mac_link_down, + .phylink_mac_link_up = mt753x_phylink_mac_link_up, + .get_mac_eee = mt753x_get_mac_eee, + .set_mac_eee = mt753x_set_mac_eee, +}; + +static const struct mt753x_info mt753x_table[] = { + [ID_MT7621] = { + .id = ID_MT7621, + .pcs_ops = &mt7530_pcs_ops, + .sw_setup = mt7530_setup, + .phy_read = mt7530_phy_read, + .phy_write = mt7530_phy_write, + .pad_setup = mt7530_pad_clk_setup, + .mac_port_get_caps = mt7530_mac_port_get_caps, + .mac_port_config = mt7530_mac_config, + }, + [ID_MT7530] = { + .id = ID_MT7530, + .pcs_ops = &mt7530_pcs_ops, + .sw_setup = mt7530_setup, + .phy_read = mt7530_phy_read, + .phy_write = mt7530_phy_write, + .pad_setup = mt7530_pad_clk_setup, + .mac_port_get_caps = mt7530_mac_port_get_caps, + .mac_port_config = mt7530_mac_config, + }, + [ID_MT7531] = { + .id = ID_MT7531, + .pcs_ops = &mt7531_pcs_ops, + .sw_setup = mt7531_setup, + .phy_read = mt7531_ind_phy_read, + .phy_write = mt7531_ind_phy_write, + .pad_setup = mt7531_pad_setup, + .cpu_port_config = mt7531_cpu_port_config, + .mac_port_get_caps = mt7531_mac_port_get_caps, + .mac_port_config = mt7531_mac_config, + }, +}; + +static const struct of_device_id mt7530_of_match[] = { + { .compatible = "mediatek,mt7621", .data = &mt753x_table[ID_MT7621], }, + { .compatible = "mediatek,mt7530", .data = &mt753x_table[ID_MT7530], }, + { .compatible = "mediatek,mt7531", .data = &mt753x_table[ID_MT7531], }, + { /* sentinel */ }, +}; +MODULE_DEVICE_TABLE(of, mt7530_of_match); + +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 = devm_kzalloc(&mdiodev->dev, sizeof(*priv->ds), GFP_KERNEL); + if (!priv->ds) + return -ENOMEM; + + priv->ds->dev = &mdiodev->dev; + priv->ds->num_ports = MT7530_NUM_PORTS; + + /* 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); + } + } + + /* Get the hardware identifier from the devicetree node. + * We will need it for some of the clock and regulator setup. + */ + priv->info = of_device_get_match_data(&mdiodev->dev); + if (!priv->info) + return -EINVAL; + + /* Sanity check if these required device operations are filled + * properly. + */ + if (!priv->info->sw_setup || !priv->info->pad_setup || + !priv->info->phy_read || !priv->info->phy_write || + !priv->info->mac_port_get_caps || + !priv->info->mac_port_config) + return -EINVAL; + + priv->id = priv->info->id; + + if (priv->id == ID_MT7530) { + 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); +} + +static void +mt7530_remove(struct mdio_device *mdiodev) +{ + struct mt7530_priv *priv = dev_get_drvdata(&mdiodev->dev); + int ret = 0; + + if (!priv) + return; + + 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); + + if (priv->irq) + mt7530_free_irq(priv); + + dsa_unregister_switch(priv->ds); + mutex_destroy(&priv->reg_mutex); +} + +static void mt7530_shutdown(struct mdio_device *mdiodev) +{ + struct mt7530_priv *priv = dev_get_drvdata(&mdiodev->dev); + + if (!priv) + return; + + dsa_switch_shutdown(priv->ds); + + dev_set_drvdata(&mdiodev->dev, NULL); +} + +static struct mdio_driver mt7530_mdio_driver = { + .probe = mt7530_probe, + .remove = mt7530_remove, + .shutdown = mt7530_shutdown, + .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"); |