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Diffstat (limited to '')
| -rw-r--r-- | drivers/net/dsa/mv88e6xxx/global2.c | 1214 |
1 files changed, 1214 insertions, 0 deletions
diff --git a/drivers/net/dsa/mv88e6xxx/global2.c b/drivers/net/dsa/mv88e6xxx/global2.c new file mode 100644 index 000000000..ac302a935 --- /dev/null +++ b/drivers/net/dsa/mv88e6xxx/global2.c @@ -0,0 +1,1214 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * Marvell 88E6xxx Switch Global 2 Registers support + * + * Copyright (c) 2008 Marvell Semiconductor + * + * Copyright (c) 2016-2017 Savoir-faire Linux Inc. + * Vivien Didelot <vivien.didelot@savoirfairelinux.com> + */ + +#include <linux/bitfield.h> +#include <linux/interrupt.h> +#include <linux/irqdomain.h> + +#include "chip.h" +#include "global1.h" /* for MV88E6XXX_G1_STS_IRQ_DEVICE */ +#include "global2.h" + +int mv88e6xxx_g2_read(struct mv88e6xxx_chip *chip, int reg, u16 *val) +{ + return mv88e6xxx_read(chip, chip->info->global2_addr, reg, val); +} + +int mv88e6xxx_g2_write(struct mv88e6xxx_chip *chip, int reg, u16 val) +{ + return mv88e6xxx_write(chip, chip->info->global2_addr, reg, val); +} + +int mv88e6xxx_g2_wait_bit(struct mv88e6xxx_chip *chip, int reg, int + bit, int val) +{ + return mv88e6xxx_wait_bit(chip, chip->info->global2_addr, reg, + bit, val); +} + +/* Offset 0x00: Interrupt Source Register */ + +static int mv88e6xxx_g2_int_source(struct mv88e6xxx_chip *chip, u16 *src) +{ + /* Read (and clear most of) the Interrupt Source bits */ + return mv88e6xxx_g2_read(chip, MV88E6XXX_G2_INT_SRC, src); +} + +/* Offset 0x01: Interrupt Mask Register */ + +static int mv88e6xxx_g2_int_mask(struct mv88e6xxx_chip *chip, u16 mask) +{ + return mv88e6xxx_g2_write(chip, MV88E6XXX_G2_INT_MASK, mask); +} + +/* Offset 0x02: Management Enable 2x */ + +static int mv88e6xxx_g2_mgmt_enable_2x(struct mv88e6xxx_chip *chip, u16 en2x) +{ + return mv88e6xxx_g2_write(chip, MV88E6XXX_G2_MGMT_EN_2X, en2x); +} + +/* Offset 0x03: Management Enable 0x */ + +static int mv88e6xxx_g2_mgmt_enable_0x(struct mv88e6xxx_chip *chip, u16 en0x) +{ + return mv88e6xxx_g2_write(chip, MV88E6XXX_G2_MGMT_EN_0X, en0x); +} + +/* Offset 0x05: Switch Management Register */ + +static int mv88e6xxx_g2_switch_mgmt_rsvd2cpu(struct mv88e6xxx_chip *chip, + bool enable) +{ + u16 val; + int err; + + err = mv88e6xxx_g2_read(chip, MV88E6XXX_G2_SWITCH_MGMT, &val); + if (err) + return err; + + if (enable) + val |= MV88E6XXX_G2_SWITCH_MGMT_RSVD2CPU; + else + val &= ~MV88E6XXX_G2_SWITCH_MGMT_RSVD2CPU; + + return mv88e6xxx_g2_write(chip, MV88E6XXX_G2_SWITCH_MGMT, val); +} + +int mv88e6185_g2_mgmt_rsvd2cpu(struct mv88e6xxx_chip *chip) +{ + int err; + + /* Consider the frames with reserved multicast destination + * addresses matching 01:80:c2:00:00:0x as MGMT. + */ + err = mv88e6xxx_g2_mgmt_enable_0x(chip, 0xffff); + if (err) + return err; + + return mv88e6xxx_g2_switch_mgmt_rsvd2cpu(chip, true); +} + +int mv88e6352_g2_mgmt_rsvd2cpu(struct mv88e6xxx_chip *chip) +{ + int err; + + /* Consider the frames with reserved multicast destination + * addresses matching 01:80:c2:00:00:2x as MGMT. + */ + err = mv88e6xxx_g2_mgmt_enable_2x(chip, 0xffff); + if (err) + return err; + + return mv88e6185_g2_mgmt_rsvd2cpu(chip); +} + +/* Offset 0x06: Device Mapping Table register */ + +int mv88e6xxx_g2_device_mapping_write(struct mv88e6xxx_chip *chip, int target, + int port) +{ + u16 val = (target << 8) | (port & 0x1f); + /* Modern chips use 5 bits to define a device mapping port, + * but bit 4 is reserved on older chips, so it is safe to use. + */ + + return mv88e6xxx_g2_write(chip, MV88E6XXX_G2_DEVICE_MAPPING, + MV88E6XXX_G2_DEVICE_MAPPING_UPDATE | val); +} + +/* Offset 0x07: Trunk Mask Table register */ + +int mv88e6xxx_g2_trunk_mask_write(struct mv88e6xxx_chip *chip, int num, + bool hash, u16 mask) +{ + u16 val = (num << 12) | (mask & mv88e6xxx_port_mask(chip)); + + if (hash) + val |= MV88E6XXX_G2_TRUNK_MASK_HASH; + + return mv88e6xxx_g2_write(chip, MV88E6XXX_G2_TRUNK_MASK, + MV88E6XXX_G2_TRUNK_MASK_UPDATE | val); +} + +/* Offset 0x08: Trunk Mapping Table register */ + +int mv88e6xxx_g2_trunk_mapping_write(struct mv88e6xxx_chip *chip, int id, + u16 map) +{ + const u16 port_mask = BIT(mv88e6xxx_num_ports(chip)) - 1; + u16 val = (id << 11) | (map & port_mask); + + return mv88e6xxx_g2_write(chip, MV88E6XXX_G2_TRUNK_MAPPING, + MV88E6XXX_G2_TRUNK_MAPPING_UPDATE | val); +} + +int mv88e6xxx_g2_trunk_clear(struct mv88e6xxx_chip *chip) +{ + const u16 port_mask = BIT(mv88e6xxx_num_ports(chip)) - 1; + int i, err; + + /* Clear all eight possible Trunk Mask vectors */ + for (i = 0; i < 8; ++i) { + err = mv88e6xxx_g2_trunk_mask_write(chip, i, false, port_mask); + if (err) + return err; + } + + /* Clear all sixteen possible Trunk ID routing vectors */ + for (i = 0; i < 16; ++i) { + err = mv88e6xxx_g2_trunk_mapping_write(chip, i, 0); + if (err) + return err; + } + + return 0; +} + +/* Offset 0x09: Ingress Rate Command register + * Offset 0x0A: Ingress Rate Data register + */ + +static int mv88e6xxx_g2_irl_wait(struct mv88e6xxx_chip *chip) +{ + int bit = __bf_shf(MV88E6XXX_G2_IRL_CMD_BUSY); + + return mv88e6xxx_g2_wait_bit(chip, MV88E6XXX_G2_IRL_CMD, bit, 0); +} + +static int mv88e6xxx_g2_irl_op(struct mv88e6xxx_chip *chip, u16 op, int port, + int res, int reg) +{ + int err; + + err = mv88e6xxx_g2_write(chip, MV88E6XXX_G2_IRL_CMD, + MV88E6XXX_G2_IRL_CMD_BUSY | op | (port << 8) | + (res << 5) | reg); + if (err) + return err; + + return mv88e6xxx_g2_irl_wait(chip); +} + +int mv88e6352_g2_irl_init_all(struct mv88e6xxx_chip *chip, int port) +{ + return mv88e6xxx_g2_irl_op(chip, MV88E6352_G2_IRL_CMD_OP_INIT_ALL, port, + 0, 0); +} + +int mv88e6390_g2_irl_init_all(struct mv88e6xxx_chip *chip, int port) +{ + return mv88e6xxx_g2_irl_op(chip, MV88E6390_G2_IRL_CMD_OP_INIT_ALL, port, + 0, 0); +} + +/* Offset 0x0B: Cross-chip Port VLAN (Addr) Register + * Offset 0x0C: Cross-chip Port VLAN Data Register + */ + +static int mv88e6xxx_g2_pvt_op_wait(struct mv88e6xxx_chip *chip) +{ + int bit = __bf_shf(MV88E6XXX_G2_PVT_ADDR_BUSY); + + return mv88e6xxx_g2_wait_bit(chip, MV88E6XXX_G2_PVT_ADDR, bit, 0); +} + +static int mv88e6xxx_g2_pvt_op(struct mv88e6xxx_chip *chip, int src_dev, + int src_port, u16 op) +{ + int err; + + /* 9-bit Cross-chip PVT pointer: with MV88E6XXX_G2_MISC_5_BIT_PORT + * cleared, source device is 5-bit, source port is 4-bit. + */ + op |= MV88E6XXX_G2_PVT_ADDR_BUSY; + op |= (src_dev & 0x1f) << 4; + op |= (src_port & 0xf); + + err = mv88e6xxx_g2_write(chip, MV88E6XXX_G2_PVT_ADDR, op); + if (err) + return err; + + return mv88e6xxx_g2_pvt_op_wait(chip); +} + +int mv88e6xxx_g2_pvt_read(struct mv88e6xxx_chip *chip, int src_dev, + int src_port, u16 *data) +{ + int err; + + err = mv88e6xxx_g2_pvt_op_wait(chip); + if (err) + return err; + + err = mv88e6xxx_g2_pvt_op(chip, src_dev, src_port, + MV88E6XXX_G2_PVT_ADDR_OP_READ); + if (err) + return err; + + return mv88e6xxx_g2_read(chip, MV88E6XXX_G2_PVT_DATA, data); +} + +int mv88e6xxx_g2_pvt_write(struct mv88e6xxx_chip *chip, int src_dev, + int src_port, u16 data) +{ + int err; + + err = mv88e6xxx_g2_pvt_op_wait(chip); + if (err) + return err; + + err = mv88e6xxx_g2_write(chip, MV88E6XXX_G2_PVT_DATA, data); + if (err) + return err; + + return mv88e6xxx_g2_pvt_op(chip, src_dev, src_port, + MV88E6XXX_G2_PVT_ADDR_OP_WRITE_PVLAN); +} + +/* Offset 0x0D: Switch MAC/WoL/WoF register */ + +static int mv88e6xxx_g2_switch_mac_write(struct mv88e6xxx_chip *chip, + unsigned int pointer, u8 data) +{ + u16 val = (pointer << 8) | data; + + return mv88e6xxx_g2_write(chip, MV88E6XXX_G2_SWITCH_MAC, + MV88E6XXX_G2_SWITCH_MAC_UPDATE | val); +} + +int mv88e6xxx_g2_set_switch_mac(struct mv88e6xxx_chip *chip, u8 *addr) +{ + int i, err; + + for (i = 0; i < 6; i++) { + err = mv88e6xxx_g2_switch_mac_write(chip, i, addr[i]); + if (err) + break; + } + + return err; +} + +/* Offset 0x0E: ATU Statistics */ + +int mv88e6xxx_g2_atu_stats_set(struct mv88e6xxx_chip *chip, u16 kind, u16 bin) +{ + return mv88e6xxx_g2_write(chip, MV88E6XXX_G2_ATU_STATS, + kind | bin); +} + +int mv88e6xxx_g2_atu_stats_get(struct mv88e6xxx_chip *chip, u16 *stats) +{ + return mv88e6xxx_g2_read(chip, MV88E6XXX_G2_ATU_STATS, stats); +} + +/* Offset 0x0F: Priority Override Table */ + +static int mv88e6xxx_g2_pot_write(struct mv88e6xxx_chip *chip, int pointer, + u8 data) +{ + u16 val = (pointer << 8) | (data & 0x7); + + return mv88e6xxx_g2_write(chip, MV88E6XXX_G2_PRIO_OVERRIDE, + MV88E6XXX_G2_PRIO_OVERRIDE_UPDATE | val); +} + +int mv88e6xxx_g2_pot_clear(struct mv88e6xxx_chip *chip) +{ + int i, err; + + /* Clear all sixteen possible Priority Override entries */ + for (i = 0; i < 16; i++) { + err = mv88e6xxx_g2_pot_write(chip, i, 0); + if (err) + break; + } + + return err; +} + +/* Offset 0x14: EEPROM Command + * Offset 0x15: EEPROM Data (for 16-bit data access) + * Offset 0x15: EEPROM Addr (for 8-bit data access) + */ + +int mv88e6xxx_g2_eeprom_wait(struct mv88e6xxx_chip *chip) +{ + int bit = __bf_shf(MV88E6XXX_G2_EEPROM_CMD_BUSY); + int err; + + err = mv88e6xxx_g2_wait_bit(chip, MV88E6XXX_G2_EEPROM_CMD, bit, 0); + if (err) + return err; + + bit = __bf_shf(MV88E6XXX_G2_EEPROM_CMD_RUNNING); + + return mv88e6xxx_g2_wait_bit(chip, MV88E6XXX_G2_EEPROM_CMD, bit, 0); +} + +static int mv88e6xxx_g2_eeprom_cmd(struct mv88e6xxx_chip *chip, u16 cmd) +{ + int err; + + err = mv88e6xxx_g2_write(chip, MV88E6XXX_G2_EEPROM_CMD, + MV88E6XXX_G2_EEPROM_CMD_BUSY | cmd); + if (err) + return err; + + return mv88e6xxx_g2_eeprom_wait(chip); +} + +static int mv88e6xxx_g2_eeprom_read8(struct mv88e6xxx_chip *chip, + u16 addr, u8 *data) +{ + u16 cmd = MV88E6XXX_G2_EEPROM_CMD_OP_READ; + int err; + + err = mv88e6xxx_g2_eeprom_wait(chip); + if (err) + return err; + + err = mv88e6xxx_g2_write(chip, MV88E6390_G2_EEPROM_ADDR, addr); + if (err) + return err; + + err = mv88e6xxx_g2_eeprom_cmd(chip, cmd); + if (err) + return err; + + err = mv88e6xxx_g2_read(chip, MV88E6XXX_G2_EEPROM_CMD, &cmd); + if (err) + return err; + + *data = cmd & 0xff; + + return 0; +} + +static int mv88e6xxx_g2_eeprom_write8(struct mv88e6xxx_chip *chip, + u16 addr, u8 data) +{ + u16 cmd = MV88E6XXX_G2_EEPROM_CMD_OP_WRITE | + MV88E6XXX_G2_EEPROM_CMD_WRITE_EN; + int err; + + err = mv88e6xxx_g2_eeprom_wait(chip); + if (err) + return err; + + err = mv88e6xxx_g2_write(chip, MV88E6390_G2_EEPROM_ADDR, addr); + if (err) + return err; + + return mv88e6xxx_g2_eeprom_cmd(chip, cmd | data); +} + +static int mv88e6xxx_g2_eeprom_read16(struct mv88e6xxx_chip *chip, + u8 addr, u16 *data) +{ + u16 cmd = MV88E6XXX_G2_EEPROM_CMD_OP_READ | addr; + int err; + + err = mv88e6xxx_g2_eeprom_wait(chip); + if (err) + return err; + + err = mv88e6xxx_g2_eeprom_cmd(chip, cmd); + if (err) + return err; + + return mv88e6xxx_g2_read(chip, MV88E6352_G2_EEPROM_DATA, data); +} + +static int mv88e6xxx_g2_eeprom_write16(struct mv88e6xxx_chip *chip, + u8 addr, u16 data) +{ + u16 cmd = MV88E6XXX_G2_EEPROM_CMD_OP_WRITE | addr; + int err; + + err = mv88e6xxx_g2_eeprom_wait(chip); + if (err) + return err; + + err = mv88e6xxx_g2_write(chip, MV88E6352_G2_EEPROM_DATA, data); + if (err) + return err; + + return mv88e6xxx_g2_eeprom_cmd(chip, cmd); +} + +int mv88e6xxx_g2_get_eeprom8(struct mv88e6xxx_chip *chip, + struct ethtool_eeprom *eeprom, u8 *data) +{ + unsigned int offset = eeprom->offset; + unsigned int len = eeprom->len; + int err; + + eeprom->len = 0; + + while (len) { + err = mv88e6xxx_g2_eeprom_read8(chip, offset, data); + if (err) + return err; + + eeprom->len++; + offset++; + data++; + len--; + } + + return 0; +} + +int mv88e6xxx_g2_set_eeprom8(struct mv88e6xxx_chip *chip, + struct ethtool_eeprom *eeprom, u8 *data) +{ + unsigned int offset = eeprom->offset; + unsigned int len = eeprom->len; + int err; + + eeprom->len = 0; + + while (len) { + err = mv88e6xxx_g2_eeprom_write8(chip, offset, *data); + if (err) + return err; + + eeprom->len++; + offset++; + data++; + len--; + } + + return 0; +} + +int mv88e6xxx_g2_get_eeprom16(struct mv88e6xxx_chip *chip, + struct ethtool_eeprom *eeprom, u8 *data) +{ + unsigned int offset = eeprom->offset; + unsigned int len = eeprom->len; + u16 val; + int err; + + eeprom->len = 0; + + if (offset & 1) { + err = mv88e6xxx_g2_eeprom_read16(chip, offset >> 1, &val); + if (err) + return err; + + *data++ = (val >> 8) & 0xff; + + offset++; + len--; + eeprom->len++; + } + + while (len >= 2) { + err = mv88e6xxx_g2_eeprom_read16(chip, offset >> 1, &val); + if (err) + return err; + + *data++ = val & 0xff; + *data++ = (val >> 8) & 0xff; + + offset += 2; + len -= 2; + eeprom->len += 2; + } + + if (len) { + err = mv88e6xxx_g2_eeprom_read16(chip, offset >> 1, &val); + if (err) + return err; + + *data++ = val & 0xff; + + offset++; + len--; + eeprom->len++; + } + + return 0; +} + +int mv88e6xxx_g2_set_eeprom16(struct mv88e6xxx_chip *chip, + struct ethtool_eeprom *eeprom, u8 *data) +{ + unsigned int offset = eeprom->offset; + unsigned int len = eeprom->len; + u16 val; + int err; + + /* Ensure the RO WriteEn bit is set */ + err = mv88e6xxx_g2_read(chip, MV88E6XXX_G2_EEPROM_CMD, &val); + if (err) + return err; + + if (!(val & MV88E6XXX_G2_EEPROM_CMD_WRITE_EN)) + return -EROFS; + + eeprom->len = 0; + + if (offset & 1) { + err = mv88e6xxx_g2_eeprom_read16(chip, offset >> 1, &val); + if (err) + return err; + + val = (*data++ << 8) | (val & 0xff); + + err = mv88e6xxx_g2_eeprom_write16(chip, offset >> 1, val); + if (err) + return err; + + offset++; + len--; + eeprom->len++; + } + + while (len >= 2) { + val = *data++; + val |= *data++ << 8; + + err = mv88e6xxx_g2_eeprom_write16(chip, offset >> 1, val); + if (err) + return err; + + offset += 2; + len -= 2; + eeprom->len += 2; + } + + if (len) { + err = mv88e6xxx_g2_eeprom_read16(chip, offset >> 1, &val); + if (err) + return err; + + val = (val & 0xff00) | *data++; + + err = mv88e6xxx_g2_eeprom_write16(chip, offset >> 1, val); + if (err) + return err; + + offset++; + len--; + eeprom->len++; + } + + return 0; +} + +/* Offset 0x18: SMI PHY Command Register + * Offset 0x19: SMI PHY Data Register + */ + +static int mv88e6xxx_g2_smi_phy_wait(struct mv88e6xxx_chip *chip) +{ + int bit = __bf_shf(MV88E6XXX_G2_SMI_PHY_CMD_BUSY); + + return mv88e6xxx_g2_wait_bit(chip, MV88E6XXX_G2_SMI_PHY_CMD, bit, 0); +} + +static int mv88e6xxx_g2_smi_phy_cmd(struct mv88e6xxx_chip *chip, u16 cmd) +{ + int err; + + err = mv88e6xxx_g2_write(chip, MV88E6XXX_G2_SMI_PHY_CMD, + MV88E6XXX_G2_SMI_PHY_CMD_BUSY | cmd); + if (err) + return err; + + return mv88e6xxx_g2_smi_phy_wait(chip); +} + +static int mv88e6xxx_g2_smi_phy_access(struct mv88e6xxx_chip *chip, + bool external, bool c45, u16 op, int dev, + int reg) +{ + u16 cmd = op; + + if (external) + cmd |= MV88E6390_G2_SMI_PHY_CMD_FUNC_EXTERNAL; + else + cmd |= MV88E6390_G2_SMI_PHY_CMD_FUNC_INTERNAL; /* empty mask */ + + if (c45) + cmd |= MV88E6XXX_G2_SMI_PHY_CMD_MODE_45; /* empty mask */ + else + cmd |= MV88E6XXX_G2_SMI_PHY_CMD_MODE_22; + + dev <<= __bf_shf(MV88E6XXX_G2_SMI_PHY_CMD_DEV_ADDR_MASK); + cmd |= dev & MV88E6XXX_G2_SMI_PHY_CMD_DEV_ADDR_MASK; + cmd |= reg & MV88E6XXX_G2_SMI_PHY_CMD_REG_ADDR_MASK; + + return mv88e6xxx_g2_smi_phy_cmd(chip, cmd); +} + +static int mv88e6xxx_g2_smi_phy_access_c22(struct mv88e6xxx_chip *chip, + bool external, u16 op, int dev, + int reg) +{ + return mv88e6xxx_g2_smi_phy_access(chip, external, false, op, dev, reg); +} + +/* IEEE 802.3 Clause 22 Read Data Register */ +static int mv88e6xxx_g2_smi_phy_read_data_c22(struct mv88e6xxx_chip *chip, + bool external, int dev, int reg, + u16 *data) +{ + u16 op = MV88E6XXX_G2_SMI_PHY_CMD_OP_22_READ_DATA; + int err; + + err = mv88e6xxx_g2_smi_phy_wait(chip); + if (err) + return err; + + err = mv88e6xxx_g2_smi_phy_access_c22(chip, external, op, dev, reg); + if (err) + return err; + + return mv88e6xxx_g2_read(chip, MV88E6XXX_G2_SMI_PHY_DATA, data); +} + +/* IEEE 802.3 Clause 22 Write Data Register */ +static int mv88e6xxx_g2_smi_phy_write_data_c22(struct mv88e6xxx_chip *chip, + bool external, int dev, int reg, + u16 data) +{ + u16 op = MV88E6XXX_G2_SMI_PHY_CMD_OP_22_WRITE_DATA; + int err; + + err = mv88e6xxx_g2_smi_phy_wait(chip); + if (err) + return err; + + err = mv88e6xxx_g2_write(chip, MV88E6XXX_G2_SMI_PHY_DATA, data); + if (err) + return err; + + return mv88e6xxx_g2_smi_phy_access_c22(chip, external, op, dev, reg); +} + +static int mv88e6xxx_g2_smi_phy_access_c45(struct mv88e6xxx_chip *chip, + bool external, u16 op, int port, + int dev) +{ + return mv88e6xxx_g2_smi_phy_access(chip, external, true, op, port, dev); +} + +/* IEEE 802.3 Clause 45 Write Address Register */ +static int mv88e6xxx_g2_smi_phy_write_addr_c45(struct mv88e6xxx_chip *chip, + bool external, int port, int dev, + int addr) +{ + u16 op = MV88E6XXX_G2_SMI_PHY_CMD_OP_45_WRITE_ADDR; + int err; + + err = mv88e6xxx_g2_smi_phy_wait(chip); + if (err) + return err; + + err = mv88e6xxx_g2_write(chip, MV88E6XXX_G2_SMI_PHY_DATA, addr); + if (err) + return err; + + return mv88e6xxx_g2_smi_phy_access_c45(chip, external, op, port, dev); +} + +/* IEEE 802.3 Clause 45 Read Data Register */ +static int mv88e6xxx_g2_smi_phy_read_data_c45(struct mv88e6xxx_chip *chip, + bool external, int port, int dev, + u16 *data) +{ + u16 op = MV88E6XXX_G2_SMI_PHY_CMD_OP_45_READ_DATA; + int err; + + err = mv88e6xxx_g2_smi_phy_access_c45(chip, external, op, port, dev); + if (err) + return err; + + return mv88e6xxx_g2_read(chip, MV88E6XXX_G2_SMI_PHY_DATA, data); +} + +static int mv88e6xxx_g2_smi_phy_read_c45(struct mv88e6xxx_chip *chip, + bool external, int port, int reg, + u16 *data) +{ + int dev = (reg >> 16) & 0x1f; + int addr = reg & 0xffff; + int err; + + err = mv88e6xxx_g2_smi_phy_write_addr_c45(chip, external, port, dev, + addr); + if (err) + return err; + + return mv88e6xxx_g2_smi_phy_read_data_c45(chip, external, port, dev, + data); +} + +/* IEEE 802.3 Clause 45 Write Data Register */ +static int mv88e6xxx_g2_smi_phy_write_data_c45(struct mv88e6xxx_chip *chip, + bool external, int port, int dev, + u16 data) +{ + u16 op = MV88E6XXX_G2_SMI_PHY_CMD_OP_45_WRITE_DATA; + int err; + + err = mv88e6xxx_g2_write(chip, MV88E6XXX_G2_SMI_PHY_DATA, data); + if (err) + return err; + + return mv88e6xxx_g2_smi_phy_access_c45(chip, external, op, port, dev); +} + +static int mv88e6xxx_g2_smi_phy_write_c45(struct mv88e6xxx_chip *chip, + bool external, int port, int reg, + u16 data) +{ + int dev = (reg >> 16) & 0x1f; + int addr = reg & 0xffff; + int err; + + err = mv88e6xxx_g2_smi_phy_write_addr_c45(chip, external, port, dev, + addr); + if (err) + return err; + + return mv88e6xxx_g2_smi_phy_write_data_c45(chip, external, port, dev, + data); +} + +int mv88e6xxx_g2_smi_phy_read(struct mv88e6xxx_chip *chip, struct mii_bus *bus, + int addr, int reg, u16 *val) +{ + struct mv88e6xxx_mdio_bus *mdio_bus = bus->priv; + bool external = mdio_bus->external; + + if (reg & MII_ADDR_C45) + return mv88e6xxx_g2_smi_phy_read_c45(chip, external, addr, reg, + val); + + return mv88e6xxx_g2_smi_phy_read_data_c22(chip, external, addr, reg, + val); +} + +int mv88e6xxx_g2_smi_phy_write(struct mv88e6xxx_chip *chip, struct mii_bus *bus, + int addr, int reg, u16 val) +{ + struct mv88e6xxx_mdio_bus *mdio_bus = bus->priv; + bool external = mdio_bus->external; + + if (reg & MII_ADDR_C45) + return mv88e6xxx_g2_smi_phy_write_c45(chip, external, addr, reg, + val); + + return mv88e6xxx_g2_smi_phy_write_data_c22(chip, external, addr, reg, + val); +} + +/* Offset 0x1B: Watchdog Control */ +static int mv88e6097_watchdog_action(struct mv88e6xxx_chip *chip, int irq) +{ + u16 reg; + + mv88e6xxx_g2_read(chip, MV88E6352_G2_WDOG_CTL, ®); + + dev_info(chip->dev, "Watchdog event: 0x%04x", reg); + + return IRQ_HANDLED; +} + +static void mv88e6097_watchdog_free(struct mv88e6xxx_chip *chip) +{ + u16 reg; + + mv88e6xxx_g2_read(chip, MV88E6352_G2_WDOG_CTL, ®); + + reg &= ~(MV88E6352_G2_WDOG_CTL_EGRESS_ENABLE | + MV88E6352_G2_WDOG_CTL_QC_ENABLE); + + mv88e6xxx_g2_write(chip, MV88E6352_G2_WDOG_CTL, reg); +} + +static int mv88e6097_watchdog_setup(struct mv88e6xxx_chip *chip) +{ + return mv88e6xxx_g2_write(chip, MV88E6352_G2_WDOG_CTL, + MV88E6352_G2_WDOG_CTL_EGRESS_ENABLE | + MV88E6352_G2_WDOG_CTL_QC_ENABLE | + MV88E6352_G2_WDOG_CTL_SWRESET); +} + +const struct mv88e6xxx_irq_ops mv88e6097_watchdog_ops = { + .irq_action = mv88e6097_watchdog_action, + .irq_setup = mv88e6097_watchdog_setup, + .irq_free = mv88e6097_watchdog_free, +}; + +static void mv88e6250_watchdog_free(struct mv88e6xxx_chip *chip) +{ + u16 reg; + + mv88e6xxx_g2_read(chip, MV88E6250_G2_WDOG_CTL, ®); + + reg &= ~(MV88E6250_G2_WDOG_CTL_EGRESS_ENABLE | + MV88E6250_G2_WDOG_CTL_QC_ENABLE); + + mv88e6xxx_g2_write(chip, MV88E6250_G2_WDOG_CTL, reg); +} + +static int mv88e6250_watchdog_setup(struct mv88e6xxx_chip *chip) +{ + return mv88e6xxx_g2_write(chip, MV88E6250_G2_WDOG_CTL, + MV88E6250_G2_WDOG_CTL_EGRESS_ENABLE | + MV88E6250_G2_WDOG_CTL_QC_ENABLE | + MV88E6250_G2_WDOG_CTL_SWRESET); +} + +const struct mv88e6xxx_irq_ops mv88e6250_watchdog_ops = { + .irq_action = mv88e6097_watchdog_action, + .irq_setup = mv88e6250_watchdog_setup, + .irq_free = mv88e6250_watchdog_free, +}; + +static int mv88e6390_watchdog_setup(struct mv88e6xxx_chip *chip) +{ + return mv88e6xxx_g2_write(chip, MV88E6390_G2_WDOG_CTL, + MV88E6390_G2_WDOG_CTL_UPDATE | + MV88E6390_G2_WDOG_CTL_PTR_INT_ENABLE | + MV88E6390_G2_WDOG_CTL_CUT_THROUGH | + MV88E6390_G2_WDOG_CTL_QUEUE_CONTROLLER | + MV88E6390_G2_WDOG_CTL_EGRESS | + MV88E6390_G2_WDOG_CTL_FORCE_IRQ); +} + +static int mv88e6390_watchdog_action(struct mv88e6xxx_chip *chip, int irq) +{ + u16 reg; + + mv88e6xxx_g2_write(chip, MV88E6390_G2_WDOG_CTL, + MV88E6390_G2_WDOG_CTL_PTR_EVENT); + mv88e6xxx_g2_read(chip, MV88E6390_G2_WDOG_CTL, ®); + + dev_info(chip->dev, "Watchdog event: 0x%04x", + reg & MV88E6390_G2_WDOG_CTL_DATA_MASK); + + mv88e6xxx_g2_write(chip, MV88E6390_G2_WDOG_CTL, + MV88E6390_G2_WDOG_CTL_PTR_HISTORY); + mv88e6xxx_g2_read(chip, MV88E6390_G2_WDOG_CTL, ®); + + dev_info(chip->dev, "Watchdog history: 0x%04x", + reg & MV88E6390_G2_WDOG_CTL_DATA_MASK); + + /* Trigger a software reset to try to recover the switch */ + if (chip->info->ops->reset) + chip->info->ops->reset(chip); + + mv88e6390_watchdog_setup(chip); + + return IRQ_HANDLED; +} + +static void mv88e6390_watchdog_free(struct mv88e6xxx_chip *chip) +{ + mv88e6xxx_g2_write(chip, MV88E6390_G2_WDOG_CTL, + MV88E6390_G2_WDOG_CTL_UPDATE | + MV88E6390_G2_WDOG_CTL_PTR_INT_ENABLE); +} + +const struct mv88e6xxx_irq_ops mv88e6390_watchdog_ops = { + .irq_action = mv88e6390_watchdog_action, + .irq_setup = mv88e6390_watchdog_setup, + .irq_free = mv88e6390_watchdog_free, +}; + +static int mv88e6393x_watchdog_action(struct mv88e6xxx_chip *chip, int irq) +{ + mv88e6390_watchdog_action(chip, irq); + + /* Fix for clearing the force WD event bit. + * Unreleased erratum on mv88e6393x. + */ + mv88e6xxx_g2_write(chip, MV88E6390_G2_WDOG_CTL, + MV88E6390_G2_WDOG_CTL_UPDATE | + MV88E6390_G2_WDOG_CTL_PTR_EVENT); + + return IRQ_HANDLED; +} + +const struct mv88e6xxx_irq_ops mv88e6393x_watchdog_ops = { + .irq_action = mv88e6393x_watchdog_action, + .irq_setup = mv88e6390_watchdog_setup, + .irq_free = mv88e6390_watchdog_free, +}; + +static irqreturn_t mv88e6xxx_g2_watchdog_thread_fn(int irq, void *dev_id) +{ + struct mv88e6xxx_chip *chip = dev_id; + irqreturn_t ret = IRQ_NONE; + + mv88e6xxx_reg_lock(chip); + if (chip->info->ops->watchdog_ops->irq_action) + ret = chip->info->ops->watchdog_ops->irq_action(chip, irq); + mv88e6xxx_reg_unlock(chip); + + return ret; +} + +static void mv88e6xxx_g2_watchdog_free(struct mv88e6xxx_chip *chip) +{ + mv88e6xxx_reg_lock(chip); + if (chip->info->ops->watchdog_ops->irq_free) + chip->info->ops->watchdog_ops->irq_free(chip); + mv88e6xxx_reg_unlock(chip); + + free_irq(chip->watchdog_irq, chip); + irq_dispose_mapping(chip->watchdog_irq); +} + +static int mv88e6xxx_g2_watchdog_setup(struct mv88e6xxx_chip *chip) +{ + int err; + + chip->watchdog_irq = irq_find_mapping(chip->g2_irq.domain, + MV88E6XXX_G2_INT_SOURCE_WATCHDOG); + if (chip->watchdog_irq < 0) + return chip->watchdog_irq; + + snprintf(chip->watchdog_irq_name, sizeof(chip->watchdog_irq_name), + "mv88e6xxx-%s-watchdog", dev_name(chip->dev)); + + err = request_threaded_irq(chip->watchdog_irq, NULL, + mv88e6xxx_g2_watchdog_thread_fn, + IRQF_ONESHOT | IRQF_TRIGGER_FALLING, + chip->watchdog_irq_name, chip); + if (err) + return err; + + mv88e6xxx_reg_lock(chip); + if (chip->info->ops->watchdog_ops->irq_setup) + err = chip->info->ops->watchdog_ops->irq_setup(chip); + mv88e6xxx_reg_unlock(chip); + + return err; +} + +/* Offset 0x1D: Misc Register */ + +static int mv88e6xxx_g2_misc_5_bit_port(struct mv88e6xxx_chip *chip, + bool port_5_bit) +{ + u16 val; + int err; + + err = mv88e6xxx_g2_read(chip, MV88E6XXX_G2_MISC, &val); + if (err) + return err; + + if (port_5_bit) + val |= MV88E6XXX_G2_MISC_5_BIT_PORT; + else + val &= ~MV88E6XXX_G2_MISC_5_BIT_PORT; + + return mv88e6xxx_g2_write(chip, MV88E6XXX_G2_MISC, val); +} + +int mv88e6xxx_g2_misc_4_bit_port(struct mv88e6xxx_chip *chip) +{ + return mv88e6xxx_g2_misc_5_bit_port(chip, false); +} + +static void mv88e6xxx_g2_irq_mask(struct irq_data *d) +{ + struct mv88e6xxx_chip *chip = irq_data_get_irq_chip_data(d); + unsigned int n = d->hwirq; + + chip->g2_irq.masked |= (1 << n); +} + +static void mv88e6xxx_g2_irq_unmask(struct irq_data *d) +{ + struct mv88e6xxx_chip *chip = irq_data_get_irq_chip_data(d); + unsigned int n = d->hwirq; + + chip->g2_irq.masked &= ~(1 << n); +} + +static irqreturn_t mv88e6xxx_g2_irq_thread_fn(int irq, void *dev_id) +{ + struct mv88e6xxx_chip *chip = dev_id; + unsigned int nhandled = 0; + unsigned int sub_irq; + unsigned int n; + int err; + u16 reg; + + mv88e6xxx_reg_lock(chip); + err = mv88e6xxx_g2_int_source(chip, ®); + mv88e6xxx_reg_unlock(chip); + if (err) + goto out; + + for (n = 0; n < 16; ++n) { + if (reg & (1 << n)) { + sub_irq = irq_find_mapping(chip->g2_irq.domain, n); + handle_nested_irq(sub_irq); + ++nhandled; + } + } +out: + return (nhandled > 0 ? IRQ_HANDLED : IRQ_NONE); +} + +static void mv88e6xxx_g2_irq_bus_lock(struct irq_data *d) +{ + struct mv88e6xxx_chip *chip = irq_data_get_irq_chip_data(d); + + mv88e6xxx_reg_lock(chip); +} + +static void mv88e6xxx_g2_irq_bus_sync_unlock(struct irq_data *d) +{ + struct mv88e6xxx_chip *chip = irq_data_get_irq_chip_data(d); + int err; + + err = mv88e6xxx_g2_int_mask(chip, ~chip->g2_irq.masked); + if (err) + dev_err(chip->dev, "failed to mask interrupts\n"); + + mv88e6xxx_reg_unlock(chip); +} + +static const struct irq_chip mv88e6xxx_g2_irq_chip = { + .name = "mv88e6xxx-g2", + .irq_mask = mv88e6xxx_g2_irq_mask, + .irq_unmask = mv88e6xxx_g2_irq_unmask, + .irq_bus_lock = mv88e6xxx_g2_irq_bus_lock, + .irq_bus_sync_unlock = mv88e6xxx_g2_irq_bus_sync_unlock, +}; + +static int mv88e6xxx_g2_irq_domain_map(struct irq_domain *d, + unsigned int irq, + irq_hw_number_t hwirq) +{ + struct mv88e6xxx_chip *chip = d->host_data; + + irq_set_chip_data(irq, d->host_data); + irq_set_chip_and_handler(irq, &chip->g2_irq.chip, handle_level_irq); + irq_set_noprobe(irq); + + return 0; +} + +static const struct irq_domain_ops mv88e6xxx_g2_irq_domain_ops = { + .map = mv88e6xxx_g2_irq_domain_map, + .xlate = irq_domain_xlate_twocell, +}; + +void mv88e6xxx_g2_irq_free(struct mv88e6xxx_chip *chip) +{ + int irq, virq; + + mv88e6xxx_g2_watchdog_free(chip); + + free_irq(chip->device_irq, chip); + irq_dispose_mapping(chip->device_irq); + + for (irq = 0; irq < 16; irq++) { + virq = irq_find_mapping(chip->g2_irq.domain, irq); + irq_dispose_mapping(virq); + } + + irq_domain_remove(chip->g2_irq.domain); +} + +int mv88e6xxx_g2_irq_setup(struct mv88e6xxx_chip *chip) +{ + int err, irq, virq; + + chip->g2_irq.masked = ~0; + mv88e6xxx_reg_lock(chip); + err = mv88e6xxx_g2_int_mask(chip, ~chip->g2_irq.masked); + mv88e6xxx_reg_unlock(chip); + if (err) + return err; + + chip->g2_irq.domain = irq_domain_add_simple( + chip->dev->of_node, 16, 0, &mv88e6xxx_g2_irq_domain_ops, chip); + if (!chip->g2_irq.domain) + return -ENOMEM; + + for (irq = 0; irq < 16; irq++) + irq_create_mapping(chip->g2_irq.domain, irq); + + chip->g2_irq.chip = mv88e6xxx_g2_irq_chip; + + chip->device_irq = irq_find_mapping(chip->g1_irq.domain, + MV88E6XXX_G1_STS_IRQ_DEVICE); + if (chip->device_irq < 0) { + err = chip->device_irq; + goto out; + } + + snprintf(chip->device_irq_name, sizeof(chip->device_irq_name), + "mv88e6xxx-%s-g2", dev_name(chip->dev)); + + err = request_threaded_irq(chip->device_irq, NULL, + mv88e6xxx_g2_irq_thread_fn, + IRQF_ONESHOT, chip->device_irq_name, chip); + if (err) + goto out; + + return mv88e6xxx_g2_watchdog_setup(chip); + +out: + for (irq = 0; irq < 16; irq++) { + virq = irq_find_mapping(chip->g2_irq.domain, irq); + irq_dispose_mapping(virq); + } + + irq_domain_remove(chip->g2_irq.domain); + + return err; +} + +int mv88e6xxx_g2_irq_mdio_setup(struct mv88e6xxx_chip *chip, + struct mii_bus *bus) +{ + int phy, irq, err, err_phy; + + for (phy = 0; phy < chip->info->num_internal_phys; phy++) { + irq = irq_find_mapping(chip->g2_irq.domain, phy); + if (irq < 0) { + err = irq; + goto out; + } + bus->irq[chip->info->phy_base_addr + phy] = irq; + } + return 0; +out: + err_phy = phy; + + for (phy = 0; phy < err_phy; phy++) + irq_dispose_mapping(bus->irq[phy]); + + return err; +} + +void mv88e6xxx_g2_irq_mdio_free(struct mv88e6xxx_chip *chip, + struct mii_bus *bus) +{ + int phy; + + for (phy = 0; phy < chip->info->num_internal_phys; phy++) + irq_dispose_mapping(bus->irq[phy]); +} |