/* * Marvell 88E6xxx Switch Global (1) Registers support * * Copyright (c) 2008 Marvell Semiconductor * * Copyright (c) 2016-2017 Savoir-faire Linux Inc. * Vivien Didelot * * 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 "chip.h" #include "global1.h" int mv88e6xxx_g1_read(struct mv88e6xxx_chip *chip, int reg, u16 *val) { int addr = chip->info->global1_addr; return mv88e6xxx_read(chip, addr, reg, val); } int mv88e6xxx_g1_write(struct mv88e6xxx_chip *chip, int reg, u16 val) { int addr = chip->info->global1_addr; return mv88e6xxx_write(chip, addr, reg, val); } int mv88e6xxx_g1_wait(struct mv88e6xxx_chip *chip, int reg, u16 mask) { return mv88e6xxx_wait(chip, chip->info->global1_addr, reg, mask); } /* Offset 0x00: Switch Global Status Register */ static int mv88e6185_g1_wait_ppu_disabled(struct mv88e6xxx_chip *chip) { u16 state; int i, err; for (i = 0; i < 16; i++) { err = mv88e6xxx_g1_read(chip, GLOBAL_STATUS, &state); if (err) return err; /* Check the value of the PPUState bits 15:14 */ state &= GLOBAL_STATUS_PPU_STATE_MASK; if (state != GLOBAL_STATUS_PPU_STATE_POLLING) return 0; usleep_range(1000, 2000); } return -ETIMEDOUT; } static int mv88e6185_g1_wait_ppu_polling(struct mv88e6xxx_chip *chip) { u16 state; int i, err; for (i = 0; i < 16; ++i) { err = mv88e6xxx_g1_read(chip, GLOBAL_STATUS, &state); if (err) return err; /* Check the value of the PPUState bits 15:14 */ state &= GLOBAL_STATUS_PPU_STATE_MASK; if (state == GLOBAL_STATUS_PPU_STATE_POLLING) return 0; usleep_range(1000, 2000); } return -ETIMEDOUT; } static int mv88e6352_g1_wait_ppu_polling(struct mv88e6xxx_chip *chip) { u16 state; int i, err; for (i = 0; i < 16; ++i) { err = mv88e6xxx_g1_read(chip, GLOBAL_STATUS, &state); if (err) return err; /* Check the value of the PPUState (or InitState) bit 15 */ if (state & GLOBAL_STATUS_PPU_STATE) return 0; usleep_range(1000, 2000); } return -ETIMEDOUT; } static int mv88e6xxx_g1_wait_init_ready(struct mv88e6xxx_chip *chip) { const unsigned long timeout = jiffies + 1 * HZ; u16 val; int err; /* Wait up to 1 second for the switch to be ready. The InitReady bit 11 * is set to a one when all units inside the device (ATU, VTU, etc.) * have finished their initialization and are ready to accept frames. */ while (time_before(jiffies, timeout)) { err = mv88e6xxx_g1_read(chip, GLOBAL_STATUS, &val); if (err) return err; if (val & GLOBAL_STATUS_INIT_READY) break; usleep_range(1000, 2000); } if (time_after(jiffies, timeout)) return -ETIMEDOUT; return 0; } /* Offset 0x04: Switch Global Control Register */ int mv88e6185_g1_reset(struct mv88e6xxx_chip *chip) { u16 val; int err; /* Set the SWReset bit 15 along with the PPUEn bit 14, to also restart * the PPU, including re-doing PHY detection and initialization */ err = mv88e6xxx_g1_read(chip, GLOBAL_CONTROL, &val); if (err) return err; val |= GLOBAL_CONTROL_SW_RESET; val |= GLOBAL_CONTROL_PPU_ENABLE; err = mv88e6xxx_g1_write(chip, GLOBAL_CONTROL, val); if (err) return err; err = mv88e6xxx_g1_wait_init_ready(chip); if (err) return err; return mv88e6185_g1_wait_ppu_polling(chip); } int mv88e6352_g1_reset(struct mv88e6xxx_chip *chip) { u16 val; int err; /* Set the SWReset bit 15 */ err = mv88e6xxx_g1_read(chip, GLOBAL_CONTROL, &val); if (err) return err; val |= GLOBAL_CONTROL_SW_RESET; err = mv88e6xxx_g1_write(chip, GLOBAL_CONTROL, val); if (err) return err; err = mv88e6xxx_g1_wait_init_ready(chip); if (err) return err; return mv88e6352_g1_wait_ppu_polling(chip); } int mv88e6185_g1_ppu_enable(struct mv88e6xxx_chip *chip) { u16 val; int err; err = mv88e6xxx_g1_read(chip, GLOBAL_CONTROL, &val); if (err) return err; val |= GLOBAL_CONTROL_PPU_ENABLE; err = mv88e6xxx_g1_write(chip, GLOBAL_CONTROL, val); if (err) return err; return mv88e6185_g1_wait_ppu_polling(chip); } int mv88e6185_g1_ppu_disable(struct mv88e6xxx_chip *chip) { u16 val; int err; err = mv88e6xxx_g1_read(chip, GLOBAL_CONTROL, &val); if (err) return err; val &= ~GLOBAL_CONTROL_PPU_ENABLE; err = mv88e6xxx_g1_write(chip, GLOBAL_CONTROL, val); if (err) return err; return mv88e6185_g1_wait_ppu_disabled(chip); } /* Offset 0x1a: Monitor Control */ /* Offset 0x1a: Monitor & MGMT Control on some devices */ int mv88e6095_g1_set_egress_port(struct mv88e6xxx_chip *chip, int port) { u16 reg; int err; err = mv88e6xxx_g1_read(chip, GLOBAL_MONITOR_CONTROL, ®); if (err) return err; reg &= ~(GLOBAL_MONITOR_CONTROL_INGRESS_MASK | GLOBAL_MONITOR_CONTROL_EGRESS_MASK); reg |= port << GLOBAL_MONITOR_CONTROL_INGRESS_SHIFT | port << GLOBAL_MONITOR_CONTROL_EGRESS_SHIFT; return mv88e6xxx_g1_write(chip, GLOBAL_MONITOR_CONTROL, reg); } /* Older generations also call this the ARP destination. It has been * generalized in more modern devices such that more than ARP can * egress it */ int mv88e6095_g1_set_cpu_port(struct mv88e6xxx_chip *chip, int port) { u16 reg; int err; err = mv88e6xxx_g1_read(chip, GLOBAL_MONITOR_CONTROL, ®); if (err) return err; reg &= ~GLOBAL_MONITOR_CONTROL_ARP_MASK; reg |= port << GLOBAL_MONITOR_CONTROL_ARP_SHIFT; return mv88e6xxx_g1_write(chip, GLOBAL_MONITOR_CONTROL, reg); } static int mv88e6390_g1_monitor_write(struct mv88e6xxx_chip *chip, u16 pointer, u8 data) { u16 reg; reg = GLOBAL_MONITOR_CONTROL_UPDATE | pointer | data; return mv88e6xxx_g1_write(chip, GLOBAL_MONITOR_CONTROL, reg); } int mv88e6390_g1_set_egress_port(struct mv88e6xxx_chip *chip, int port) { int err; err = mv88e6390_g1_monitor_write(chip, GLOBAL_MONITOR_CONTROL_INGRESS, port); if (err) return err; return mv88e6390_g1_monitor_write(chip, GLOBAL_MONITOR_CONTROL_EGRESS, port); } int mv88e6390_g1_set_cpu_port(struct mv88e6xxx_chip *chip, int port) { return mv88e6390_g1_monitor_write(chip, GLOBAL_MONITOR_CONTROL_CPU_DEST, port); } int mv88e6390_g1_mgmt_rsvd2cpu(struct mv88e6xxx_chip *chip) { int err; /* 01:c2:80:00:00:00:00-01:c2:80:00:00:00:07 are Management */ err = mv88e6390_g1_monitor_write( chip, GLOBAL_MONITOR_CONTROL_0180C280000000XLO, 0xff); if (err) return err; /* 01:c2:80:00:00:00:08-01:c2:80:00:00:00:0f are Management */ err = mv88e6390_g1_monitor_write( chip, GLOBAL_MONITOR_CONTROL_0180C280000000XHI, 0xff); if (err) return err; /* 01:c2:80:00:00:00:20-01:c2:80:00:00:00:27 are Management */ err = mv88e6390_g1_monitor_write( chip, GLOBAL_MONITOR_CONTROL_0180C280000002XLO, 0xff); if (err) return err; /* 01:c2:80:00:00:00:28-01:c2:80:00:00:00:2f are Management */ return mv88e6390_g1_monitor_write( chip, GLOBAL_MONITOR_CONTROL_0180C280000002XHI, 0xff); } /* Offset 0x1c: Global Control 2 */ int mv88e6390_g1_stats_set_histogram(struct mv88e6xxx_chip *chip) { u16 val; int err; err = mv88e6xxx_g1_read(chip, GLOBAL_CONTROL_2, &val); if (err) return err; val |= GLOBAL_CONTROL_2_HIST_RX_TX; err = mv88e6xxx_g1_write(chip, GLOBAL_CONTROL_2, val); return err; } /* Offset 0x1d: Statistics Operation 2 */ int mv88e6xxx_g1_stats_wait(struct mv88e6xxx_chip *chip) { return mv88e6xxx_g1_wait(chip, GLOBAL_STATS_OP, GLOBAL_STATS_OP_BUSY); } int mv88e6xxx_g1_stats_snapshot(struct mv88e6xxx_chip *chip, int port) { int err; /* Snapshot the hardware statistics counters for this port. */ err = mv88e6xxx_g1_write(chip, GLOBAL_STATS_OP, GLOBAL_STATS_OP_CAPTURE_PORT | GLOBAL_STATS_OP_HIST_RX_TX | port); if (err) return err; /* Wait for the snapshotting to complete. */ return mv88e6xxx_g1_stats_wait(chip); } int mv88e6320_g1_stats_snapshot(struct mv88e6xxx_chip *chip, int port) { port = (port + 1) << 5; return mv88e6xxx_g1_stats_snapshot(chip, port); } int mv88e6390_g1_stats_snapshot(struct mv88e6xxx_chip *chip, int port) { int err; port = (port + 1) << 5; /* Snapshot the hardware statistics counters for this port. */ err = mv88e6xxx_g1_write(chip, GLOBAL_STATS_OP, GLOBAL_STATS_OP_CAPTURE_PORT | port); if (err) return err; /* Wait for the snapshotting to complete. */ return mv88e6xxx_g1_stats_wait(chip); } void mv88e6xxx_g1_stats_read(struct mv88e6xxx_chip *chip, int stat, u32 *val) { u32 value; u16 reg; int err; *val = 0; err = mv88e6xxx_g1_write(chip, GLOBAL_STATS_OP, GLOBAL_STATS_OP_READ_CAPTURED | stat); if (err) return; err = mv88e6xxx_g1_stats_wait(chip); if (err) return; err = mv88e6xxx_g1_read(chip, GLOBAL_STATS_COUNTER_32, ®); if (err) return; value = reg << 16; err = mv88e6xxx_g1_read(chip, GLOBAL_STATS_COUNTER_01, ®); if (err) return; *val = value | reg; }