| /* |
| * Marvell 88E6xxx Switch Global 2 Registers support (device address |
| * 0x1C) |
| * |
| * Copyright (c) 2008 Marvell Semiconductor |
| * |
| * Copyright (c) 2016-2017 Savoir-faire Linux Inc. |
| * Vivien Didelot <vivien.didelot@savoirfairelinux.com> |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License as published by |
| * the Free Software Foundation; either version 2 of the License, or |
| * (at your option) any later version. |
| */ |
| |
| #include <linux/interrupt.h> |
| #include <linux/irqdomain.h> |
| #include "mv88e6xxx.h" |
| #include "global2.h" |
| |
| #define ADDR_GLOBAL2 0x1c |
| |
| static int mv88e6xxx_g2_read(struct mv88e6xxx_chip *chip, int reg, u16 *val) |
| { |
| return mv88e6xxx_read(chip, ADDR_GLOBAL2, reg, val); |
| } |
| |
| static int mv88e6xxx_g2_write(struct mv88e6xxx_chip *chip, int reg, u16 val) |
| { |
| return mv88e6xxx_write(chip, ADDR_GLOBAL2, reg, val); |
| } |
| |
| static int mv88e6xxx_g2_update(struct mv88e6xxx_chip *chip, int reg, u16 update) |
| { |
| return mv88e6xxx_update(chip, ADDR_GLOBAL2, reg, update); |
| } |
| |
| static int mv88e6xxx_g2_wait(struct mv88e6xxx_chip *chip, int reg, u16 mask) |
| { |
| return mv88e6xxx_wait(chip, ADDR_GLOBAL2, reg, mask); |
| } |
| |
| /* Offset 0x02: Management Enable 2x */ |
| /* Offset 0x03: Management Enable 0x */ |
| |
| int mv88e6095_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. |
| */ |
| if (mv88e6xxx_has(chip, MV88E6XXX_FLAG_G2_MGMT_EN_2X)) { |
| err = mv88e6xxx_g2_write(chip, GLOBAL2_MGMT_EN_2X, 0xffff); |
| if (err) |
| return err; |
| } |
| |
| /* Consider the frames with reserved multicast destination |
| * addresses matching 01:80:c2:00:00:0x as MGMT. |
| */ |
| if (mv88e6xxx_has(chip, MV88E6XXX_FLAG_G2_MGMT_EN_0X)) |
| return mv88e6xxx_g2_write(chip, GLOBAL2_MGMT_EN_0X, 0xffff); |
| |
| return 0; |
| } |
| |
| /* Offset 0x06: Device Mapping Table register */ |
| |
| static int mv88e6xxx_g2_device_mapping_write(struct mv88e6xxx_chip *chip, |
| int target, int port) |
| { |
| u16 val = (target << 8) | (port & 0xf); |
| |
| return mv88e6xxx_g2_update(chip, GLOBAL2_DEVICE_MAPPING, val); |
| } |
| |
| static int mv88e6xxx_g2_set_device_mapping(struct mv88e6xxx_chip *chip) |
| { |
| int target, port; |
| int err; |
| |
| /* Initialize the routing port to the 32 possible target devices */ |
| for (target = 0; target < 32; ++target) { |
| port = 0xf; |
| |
| if (target < DSA_MAX_SWITCHES) { |
| port = chip->ds->rtable[target]; |
| if (port == DSA_RTABLE_NONE) |
| port = 0xf; |
| } |
| |
| err = mv88e6xxx_g2_device_mapping_write(chip, target, port); |
| if (err) |
| break; |
| } |
| |
| return err; |
| } |
| |
| /* Offset 0x07: Trunk Mask Table register */ |
| |
| static int mv88e6xxx_g2_trunk_mask_write(struct mv88e6xxx_chip *chip, int num, |
| bool hask, u16 mask) |
| { |
| const u16 port_mask = BIT(mv88e6xxx_num_ports(chip)) - 1; |
| u16 val = (num << 12) | (mask & port_mask); |
| |
| if (hask) |
| val |= GLOBAL2_TRUNK_MASK_HASK; |
| |
| return mv88e6xxx_g2_update(chip, GLOBAL2_TRUNK_MASK, val); |
| } |
| |
| /* Offset 0x08: Trunk Mapping Table register */ |
| |
| static 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_update(chip, GLOBAL2_TRUNK_MAPPING, val); |
| } |
| |
| static int mv88e6xxx_g2_clear_trunk(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_clear_irl(struct mv88e6xxx_chip *chip) |
| { |
| int port, err; |
| |
| /* Init all Ingress Rate Limit resources of all ports */ |
| for (port = 0; port < mv88e6xxx_num_ports(chip); ++port) { |
| /* XXX newer chips (like 88E6390) have different 2-bit ops */ |
| err = mv88e6xxx_g2_write(chip, GLOBAL2_IRL_CMD, |
| GLOBAL2_IRL_CMD_OP_INIT_ALL | |
| (port << 8)); |
| if (err) |
| break; |
| |
| /* Wait for the operation to complete */ |
| err = mv88e6xxx_g2_wait(chip, GLOBAL2_IRL_CMD, |
| GLOBAL2_IRL_CMD_BUSY); |
| if (err) |
| break; |
| } |
| |
| return err; |
| } |
| |
| /* 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) |
| { |
| return mv88e6xxx_g2_wait(chip, GLOBAL2_PVT_ADDR, GLOBAL2_PVT_ADDR_BUSY); |
| } |
| |
| 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 GLOBAL2_MISC_5_BIT_PORT cleared, |
| * source device is 5-bit, source port is 4-bit. |
| */ |
| op |= (src_dev & 0x1f) << 4; |
| op |= (src_port & 0xf); |
| |
| err = mv88e6xxx_g2_write(chip, GLOBAL2_PVT_ADDR, op); |
| if (err) |
| return err; |
| |
| return mv88e6xxx_g2_pvt_op_wait(chip); |
| } |
| |
| 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, GLOBAL2_PVT_DATA, data); |
| if (err) |
| return err; |
| |
| return mv88e6xxx_g2_pvt_op(chip, src_dev, src_port, |
| GLOBAL2_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_update(chip, GLOBAL2_SWITCH_MAC, 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 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_update(chip, GLOBAL2_PRIO_OVERRIDE, val); |
| } |
| |
| static int mv88e6xxx_g2_clear_pot(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) |
| */ |
| |
| static int mv88e6xxx_g2_eeprom_wait(struct mv88e6xxx_chip *chip) |
| { |
| return mv88e6xxx_g2_wait(chip, GLOBAL2_EEPROM_CMD, |
| GLOBAL2_EEPROM_CMD_BUSY | |
| GLOBAL2_EEPROM_CMD_RUNNING); |
| } |
| |
| static int mv88e6xxx_g2_eeprom_cmd(struct mv88e6xxx_chip *chip, u16 cmd) |
| { |
| int err; |
| |
| err = mv88e6xxx_g2_write(chip, GLOBAL2_EEPROM_CMD, 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 = GLOBAL2_EEPROM_CMD_OP_READ; |
| int err; |
| |
| err = mv88e6xxx_g2_eeprom_wait(chip); |
| if (err) |
| return err; |
| |
| err = mv88e6xxx_g2_write(chip, GLOBAL2_EEPROM_ADDR, addr); |
| if (err) |
| return err; |
| |
| err = mv88e6xxx_g2_eeprom_cmd(chip, cmd); |
| if (err) |
| return err; |
| |
| err = mv88e6xxx_g2_read(chip, GLOBAL2_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 = GLOBAL2_EEPROM_CMD_OP_WRITE | GLOBAL2_EEPROM_CMD_WRITE_EN; |
| int err; |
| |
| err = mv88e6xxx_g2_eeprom_wait(chip); |
| if (err) |
| return err; |
| |
| err = mv88e6xxx_g2_write(chip, GLOBAL2_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 = GLOBAL2_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, GLOBAL2_EEPROM_DATA, data); |
| } |
| |
| static int mv88e6xxx_g2_eeprom_write16(struct mv88e6xxx_chip *chip, |
| u8 addr, u16 data) |
| { |
| u16 cmd = GLOBAL2_EEPROM_CMD_OP_WRITE | addr; |
| int err; |
| |
| err = mv88e6xxx_g2_eeprom_wait(chip); |
| if (err) |
| return err; |
| |
| err = mv88e6xxx_g2_write(chip, GLOBAL2_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, GLOBAL2_EEPROM_CMD, &val); |
| if (err) |
| return err; |
| |
| if (!(val & GLOBAL2_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) |
| { |
| return mv88e6xxx_g2_wait(chip, GLOBAL2_SMI_PHY_CMD, |
| GLOBAL2_SMI_PHY_CMD_BUSY); |
| } |
| |
| static int mv88e6xxx_g2_smi_phy_cmd(struct mv88e6xxx_chip *chip, u16 cmd) |
| { |
| int err; |
| |
| err = mv88e6xxx_g2_write(chip, GLOBAL2_SMI_PHY_CMD, cmd); |
| if (err) |
| return err; |
| |
| return mv88e6xxx_g2_smi_phy_wait(chip); |
| } |
| |
| static int mv88e6xxx_g2_smi_phy_write_addr(struct mv88e6xxx_chip *chip, |
| int addr, int device, int reg, |
| bool external) |
| { |
| int cmd = SMI_CMD_OP_45_WRITE_ADDR | (addr << 5) | device; |
| int err; |
| |
| if (external) |
| cmd |= GLOBAL2_SMI_PHY_CMD_EXTERNAL; |
| |
| err = mv88e6xxx_g2_smi_phy_wait(chip); |
| if (err) |
| return err; |
| |
| err = mv88e6xxx_g2_write(chip, GLOBAL2_SMI_PHY_DATA, reg); |
| if (err) |
| return err; |
| |
| return mv88e6xxx_g2_smi_phy_cmd(chip, cmd); |
| } |
| |
| static int mv88e6xxx_g2_smi_phy_read_c45(struct mv88e6xxx_chip *chip, |
| int addr, int reg_c45, u16 *val, |
| bool external) |
| { |
| int device = (reg_c45 >> 16) & 0x1f; |
| int reg = reg_c45 & 0xffff; |
| int err; |
| u16 cmd; |
| |
| err = mv88e6xxx_g2_smi_phy_write_addr(chip, addr, device, reg, |
| external); |
| if (err) |
| return err; |
| |
| cmd = GLOBAL2_SMI_PHY_CMD_OP_45_READ_DATA | (addr << 5) | device; |
| |
| if (external) |
| cmd |= GLOBAL2_SMI_PHY_CMD_EXTERNAL; |
| |
| err = mv88e6xxx_g2_smi_phy_cmd(chip, cmd); |
| if (err) |
| return err; |
| |
| err = mv88e6xxx_g2_read(chip, GLOBAL2_SMI_PHY_DATA, val); |
| if (err) |
| return err; |
| |
| err = *val; |
| |
| return 0; |
| } |
| |
| static int mv88e6xxx_g2_smi_phy_read_c22(struct mv88e6xxx_chip *chip, |
| int addr, int reg, u16 *val, |
| bool external) |
| { |
| u16 cmd = GLOBAL2_SMI_PHY_CMD_OP_22_READ_DATA | (addr << 5) | reg; |
| int err; |
| |
| if (external) |
| cmd |= GLOBAL2_SMI_PHY_CMD_EXTERNAL; |
| |
| err = mv88e6xxx_g2_smi_phy_wait(chip); |
| if (err) |
| return err; |
| |
| err = mv88e6xxx_g2_smi_phy_cmd(chip, cmd); |
| if (err) |
| return err; |
| |
| return mv88e6xxx_g2_read(chip, GLOBAL2_SMI_PHY_DATA, val); |
| } |
| |
| 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, addr, reg, val, |
| external); |
| return mv88e6xxx_g2_smi_phy_read_c22(chip, addr, reg, val, external); |
| } |
| |
| static int mv88e6xxx_g2_smi_phy_write_c45(struct mv88e6xxx_chip *chip, |
| int addr, int reg_c45, u16 val, |
| bool external) |
| { |
| int device = (reg_c45 >> 16) & 0x1f; |
| int reg = reg_c45 & 0xffff; |
| int err; |
| u16 cmd; |
| |
| err = mv88e6xxx_g2_smi_phy_write_addr(chip, addr, device, reg, |
| external); |
| if (err) |
| return err; |
| |
| cmd = GLOBAL2_SMI_PHY_CMD_OP_45_WRITE_DATA | (addr << 5) | device; |
| |
| if (external) |
| cmd |= GLOBAL2_SMI_PHY_CMD_EXTERNAL; |
| |
| err = mv88e6xxx_g2_write(chip, GLOBAL2_SMI_PHY_DATA, val); |
| if (err) |
| return err; |
| |
| err = mv88e6xxx_g2_smi_phy_cmd(chip, cmd); |
| if (err) |
| return err; |
| |
| return 0; |
| } |
| |
| static int mv88e6xxx_g2_smi_phy_write_c22(struct mv88e6xxx_chip *chip, |
| int addr, int reg, u16 val, |
| bool external) |
| { |
| u16 cmd = GLOBAL2_SMI_PHY_CMD_OP_22_WRITE_DATA | (addr << 5) | reg; |
| int err; |
| |
| if (external) |
| cmd |= GLOBAL2_SMI_PHY_CMD_EXTERNAL; |
| |
| err = mv88e6xxx_g2_smi_phy_wait(chip); |
| if (err) |
| return err; |
| |
| err = mv88e6xxx_g2_write(chip, GLOBAL2_SMI_PHY_DATA, val); |
| if (err) |
| return err; |
| |
| return mv88e6xxx_g2_smi_phy_cmd(chip, cmd); |
| } |
| |
| 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, addr, reg, val, |
| external); |
| |
| return mv88e6xxx_g2_smi_phy_write_c22(chip, addr, reg, val, external); |
| } |
| |
| static int mv88e6097_watchdog_action(struct mv88e6xxx_chip *chip, int irq) |
| { |
| u16 reg; |
| |
| mv88e6xxx_g2_read(chip, GLOBAL2_WDOG_CONTROL, ®); |
| |
| 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, GLOBAL2_WDOG_CONTROL, ®); |
| |
| reg &= ~(GLOBAL2_WDOG_CONTROL_EGRESS_ENABLE | |
| GLOBAL2_WDOG_CONTROL_QC_ENABLE); |
| |
| mv88e6xxx_g2_write(chip, GLOBAL2_WDOG_CONTROL, reg); |
| } |
| |
| static int mv88e6097_watchdog_setup(struct mv88e6xxx_chip *chip) |
| { |
| return mv88e6xxx_g2_write(chip, GLOBAL2_WDOG_CONTROL, |
| GLOBAL2_WDOG_CONTROL_EGRESS_ENABLE | |
| GLOBAL2_WDOG_CONTROL_QC_ENABLE | |
| GLOBAL2_WDOG_CONTROL_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 int mv88e6390_watchdog_setup(struct mv88e6xxx_chip *chip) |
| { |
| return mv88e6xxx_g2_update(chip, GLOBAL2_WDOG_CONTROL, |
| GLOBAL2_WDOG_INT_ENABLE | |
| GLOBAL2_WDOG_CUT_THROUGH | |
| GLOBAL2_WDOG_QUEUE_CONTROLLER | |
| GLOBAL2_WDOG_EGRESS | |
| GLOBAL2_WDOG_FORCE_IRQ); |
| } |
| |
| static int mv88e6390_watchdog_action(struct mv88e6xxx_chip *chip, int irq) |
| { |
| int err; |
| u16 reg; |
| |
| mv88e6xxx_g2_write(chip, GLOBAL2_WDOG_CONTROL, GLOBAL2_WDOG_EVENT); |
| err = mv88e6xxx_g2_read(chip, GLOBAL2_WDOG_CONTROL, ®); |
| |
| dev_info(chip->dev, "Watchdog event: 0x%04x", |
| reg & GLOBAL2_WDOG_DATA_MASK); |
| |
| mv88e6xxx_g2_write(chip, GLOBAL2_WDOG_CONTROL, GLOBAL2_WDOG_HISTORY); |
| err = mv88e6xxx_g2_read(chip, GLOBAL2_WDOG_CONTROL, ®); |
| |
| dev_info(chip->dev, "Watchdog history: 0x%04x", |
| reg & GLOBAL2_WDOG_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_update(chip, GLOBAL2_WDOG_CONTROL, |
| GLOBAL2_WDOG_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 irqreturn_t mv88e6xxx_g2_watchdog_thread_fn(int irq, void *dev_id) |
| { |
| struct mv88e6xxx_chip *chip = dev_id; |
| irqreturn_t ret = IRQ_NONE; |
| |
| mutex_lock(&chip->reg_lock); |
| if (chip->info->ops->watchdog_ops->irq_action) |
| ret = chip->info->ops->watchdog_ops->irq_action(chip, irq); |
| mutex_unlock(&chip->reg_lock); |
| |
| return ret; |
| } |
| |
| static void mv88e6xxx_g2_watchdog_free(struct mv88e6xxx_chip *chip) |
| { |
| mutex_lock(&chip->reg_lock); |
| if (chip->info->ops->watchdog_ops->irq_free) |
| chip->info->ops->watchdog_ops->irq_free(chip); |
| mutex_unlock(&chip->reg_lock); |
| |
| 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, |
| GLOBAL2_INT_SOURCE_WATCHDOG); |
| if (chip->watchdog_irq < 0) |
| return chip->watchdog_irq; |
| |
| err = request_threaded_irq(chip->watchdog_irq, NULL, |
| mv88e6xxx_g2_watchdog_thread_fn, |
| IRQF_ONESHOT | IRQF_TRIGGER_FALLING, |
| "mv88e6xxx-watchdog", chip); |
| if (err) |
| return err; |
| |
| mutex_lock(&chip->reg_lock); |
| if (chip->info->ops->watchdog_ops->irq_setup) |
| err = chip->info->ops->watchdog_ops->irq_setup(chip); |
| mutex_unlock(&chip->reg_lock); |
| |
| 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, GLOBAL2_MISC, &val); |
| if (err) |
| return err; |
| |
| if (port_5_bit) |
| val |= GLOBAL2_MISC_5_BIT_PORT; |
| else |
| val &= ~GLOBAL2_MISC_5_BIT_PORT; |
| |
| return mv88e6xxx_g2_write(chip, GLOBAL2_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; |
| |
| mutex_lock(&chip->reg_lock); |
| err = mv88e6xxx_g2_read(chip, GLOBAL2_INT_SOURCE, ®); |
| mutex_unlock(&chip->reg_lock); |
| 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); |
| |
| mutex_lock(&chip->reg_lock); |
| } |
| |
| static void mv88e6xxx_g2_irq_bus_sync_unlock(struct irq_data *d) |
| { |
| struct mv88e6xxx_chip *chip = irq_data_get_irq_chip_data(d); |
| |
| mv88e6xxx_g2_write(chip, GLOBAL2_INT_MASK, ~chip->g2_irq.masked); |
| |
| mutex_unlock(&chip->reg_lock); |
| } |
| |
| static 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; |
| |
| if (!chip->dev->of_node) |
| return -EINVAL; |
| |
| 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->g2_irq.masked = ~0; |
| |
| chip->device_irq = irq_find_mapping(chip->g1_irq.domain, |
| GLOBAL_STATUS_IRQ_DEVICE); |
| if (chip->device_irq < 0) { |
| err = chip->device_irq; |
| goto out; |
| } |
| |
| err = request_threaded_irq(chip->device_irq, NULL, |
| mv88e6xxx_g2_irq_thread_fn, |
| IRQF_ONESHOT, "mv88e6xxx-g1", 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_setup(struct mv88e6xxx_chip *chip) |
| { |
| u16 reg; |
| int err; |
| |
| /* Ignore removed tag data on doubly tagged packets, disable |
| * flow control messages, force flow control priority to the |
| * highest, and send all special multicast frames to the CPU |
| * port at the highest priority. |
| */ |
| reg = GLOBAL2_SWITCH_MGMT_FORCE_FLOW_CTRL_PRI | (0x7 << 4); |
| if (mv88e6xxx_has(chip, MV88E6XXX_FLAG_G2_MGMT_EN_0X) || |
| mv88e6xxx_has(chip, MV88E6XXX_FLAG_G2_MGMT_EN_2X)) |
| reg |= GLOBAL2_SWITCH_MGMT_RSVD2CPU | 0x7; |
| err = mv88e6xxx_g2_write(chip, GLOBAL2_SWITCH_MGMT, reg); |
| if (err) |
| return err; |
| |
| /* Program the DSA routing table. */ |
| err = mv88e6xxx_g2_set_device_mapping(chip); |
| if (err) |
| return err; |
| |
| /* Clear all trunk masks and mapping. */ |
| err = mv88e6xxx_g2_clear_trunk(chip); |
| if (err) |
| return err; |
| |
| if (mv88e6xxx_has(chip, MV88E6XXX_FLAGS_IRL)) { |
| /* Disable ingress rate limiting by resetting all per port |
| * ingress rate limit resources to their initial state. |
| */ |
| err = mv88e6xxx_g2_clear_irl(chip); |
| if (err) |
| return err; |
| } |
| |
| if (mv88e6xxx_has(chip, MV88E6XXX_FLAG_G2_POT)) { |
| /* Clear the priority override table. */ |
| err = mv88e6xxx_g2_clear_pot(chip); |
| if (err) |
| return err; |
| } |
| |
| return 0; |
| } |
