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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Marvell 88E6xxx Switch Global (1) 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 "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, MV88E6XXX_G1_STS, &state);
if (err)
return err;
/* Check the value of the PPUState bits 15:14 */
state &= MV88E6185_G1_STS_PPU_STATE_MASK;
if (state != MV88E6185_G1_STS_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, MV88E6XXX_G1_STS, &state);
if (err)
return err;
/* Check the value of the PPUState bits 15:14 */
state &= MV88E6185_G1_STS_PPU_STATE_MASK;
if (state == MV88E6185_G1_STS_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, MV88E6XXX_G1_STS, &state);
if (err)
return err;
/* Check the value of the PPUState (or InitState) bit 15 */
if (state & MV88E6352_G1_STS_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, MV88E6XXX_G1_STS, &val);
if (err)
return err;
if (val & MV88E6XXX_G1_STS_INIT_READY)
break;
usleep_range(1000, 2000);
}
if (time_after(jiffies, timeout))
return -ETIMEDOUT;
return 0;
}
/* Offset 0x01: Switch MAC Address Register Bytes 0 & 1
* Offset 0x02: Switch MAC Address Register Bytes 2 & 3
* Offset 0x03: Switch MAC Address Register Bytes 4 & 5
*/
int mv88e6xxx_g1_set_switch_mac(struct mv88e6xxx_chip *chip, u8 *addr)
{
u16 reg;
int err;
reg = (addr[0] << 8) | addr[1];
err = mv88e6xxx_g1_write(chip, MV88E6XXX_G1_MAC_01, reg);
if (err)
return err;
reg = (addr[2] << 8) | addr[3];
err = mv88e6xxx_g1_write(chip, MV88E6XXX_G1_MAC_23, reg);
if (err)
return err;
reg = (addr[4] << 8) | addr[5];
err = mv88e6xxx_g1_write(chip, MV88E6XXX_G1_MAC_45, reg);
if (err)
return err;
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, MV88E6XXX_G1_CTL1, &val);
if (err)
return err;
val |= MV88E6XXX_G1_CTL1_SW_RESET;
val |= MV88E6XXX_G1_CTL1_PPU_ENABLE;
err = mv88e6xxx_g1_write(chip, MV88E6XXX_G1_CTL1, 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, MV88E6XXX_G1_CTL1, &val);
if (err)
return err;
val |= MV88E6XXX_G1_CTL1_SW_RESET;
err = mv88e6xxx_g1_write(chip, MV88E6XXX_G1_CTL1, 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, MV88E6XXX_G1_CTL1, &val);
if (err)
return err;
val |= MV88E6XXX_G1_CTL1_PPU_ENABLE;
err = mv88e6xxx_g1_write(chip, MV88E6XXX_G1_CTL1, 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, MV88E6XXX_G1_CTL1, &val);
if (err)
return err;
val &= ~MV88E6XXX_G1_CTL1_PPU_ENABLE;
err = mv88e6xxx_g1_write(chip, MV88E6XXX_G1_CTL1, val);
if (err)
return err;
return mv88e6185_g1_wait_ppu_disabled(chip);
}
/* Offset 0x10: IP-PRI Mapping Register 0
* Offset 0x11: IP-PRI Mapping Register 1
* Offset 0x12: IP-PRI Mapping Register 2
* Offset 0x13: IP-PRI Mapping Register 3
* Offset 0x14: IP-PRI Mapping Register 4
* Offset 0x15: IP-PRI Mapping Register 5
* Offset 0x16: IP-PRI Mapping Register 6
* Offset 0x17: IP-PRI Mapping Register 7
*/
int mv88e6085_g1_ip_pri_map(struct mv88e6xxx_chip *chip)
{
int err;
/* Reset the IP TOS/DiffServ/Traffic priorities to defaults */
err = mv88e6xxx_g1_write(chip, MV88E6XXX_G1_IP_PRI_0, 0x0000);
if (err)
return err;
err = mv88e6xxx_g1_write(chip, MV88E6XXX_G1_IP_PRI_1, 0x0000);
if (err)
return err;
err = mv88e6xxx_g1_write(chip, MV88E6XXX_G1_IP_PRI_2, 0x5555);
if (err)
return err;
err = mv88e6xxx_g1_write(chip, MV88E6XXX_G1_IP_PRI_3, 0x5555);
if (err)
return err;
err = mv88e6xxx_g1_write(chip, MV88E6XXX_G1_IP_PRI_4, 0xaaaa);
if (err)
return err;
err = mv88e6xxx_g1_write(chip, MV88E6XXX_G1_IP_PRI_5, 0xaaaa);
if (err)
return err;
err = mv88e6xxx_g1_write(chip, MV88E6XXX_G1_IP_PRI_6, 0xffff);
if (err)
return err;
err = mv88e6xxx_g1_write(chip, MV88E6XXX_G1_IP_PRI_7, 0xffff);
if (err)
return err;
return 0;
}
/* Offset 0x18: IEEE-PRI Register */
int mv88e6085_g1_ieee_pri_map(struct mv88e6xxx_chip *chip)
{
/* Reset the IEEE Tag priorities to defaults */
return mv88e6xxx_g1_write(chip, MV88E6XXX_G1_IEEE_PRI, 0xfa41);
}
/* 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, MV88E6185_G1_MONITOR_CTL, ®);
if (err)
return err;
reg &= ~(MV88E6185_G1_MONITOR_CTL_INGRESS_DEST_MASK |
MV88E6185_G1_MONITOR_CTL_EGRESS_DEST_MASK);
reg |= port << __bf_shf(MV88E6185_G1_MONITOR_CTL_INGRESS_DEST_MASK) |
port << __bf_shf(MV88E6185_G1_MONITOR_CTL_EGRESS_DEST_MASK);
return mv88e6xxx_g1_write(chip, MV88E6185_G1_MONITOR_CTL, 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, MV88E6185_G1_MONITOR_CTL, ®);
if (err)
return err;
reg &= ~MV88E6185_G1_MONITOR_CTL_ARP_DEST_MASK;
reg |= port << __bf_shf(MV88E6185_G1_MONITOR_CTL_ARP_DEST_MASK);
return mv88e6xxx_g1_write(chip, MV88E6185_G1_MONITOR_CTL, reg);
}
static int mv88e6390_g1_monitor_write(struct mv88e6xxx_chip *chip,
u16 pointer, u8 data)
{
u16 reg;
reg = MV88E6390_G1_MONITOR_MGMT_CTL_UPDATE | pointer | data;
return mv88e6xxx_g1_write(chip, MV88E6390_G1_MONITOR_MGMT_CTL, reg);
}
int mv88e6390_g1_set_egress_port(struct mv88e6xxx_chip *chip, int port)
{
u16 ptr;
int err;
ptr = MV88E6390_G1_MONITOR_MGMT_CTL_PTR_INGRESS_DEST;
err = mv88e6390_g1_monitor_write(chip, ptr, port);
if (err)
return err;
ptr = MV88E6390_G1_MONITOR_MGMT_CTL_PTR_EGRESS_DEST;
err = mv88e6390_g1_monitor_write(chip, ptr, port);
if (err)
return err;
return 0;
}
int mv88e6390_g1_set_cpu_port(struct mv88e6xxx_chip *chip, int port)
{
u16 ptr = MV88E6390_G1_MONITOR_MGMT_CTL_PTR_CPU_DEST;
/* Use the default high priority for management frames sent to
* the CPU.
*/
port |= MV88E6390_G1_MONITOR_MGMT_CTL_PTR_CPU_DEST_MGMTPRI;
return mv88e6390_g1_monitor_write(chip, ptr, port);
}
int mv88e6390_g1_mgmt_rsvd2cpu(struct mv88e6xxx_chip *chip)
{
u16 ptr;
int err;
/* 01:c2:80:00:00:00:00-01:c2:80:00:00:00:07 are Management */
ptr = MV88E6390_G1_MONITOR_MGMT_CTL_PTR_0180C280000000XLO;
err = mv88e6390_g1_monitor_write(chip, ptr, 0xff);
if (err)
return err;
/* 01:c2:80:00:00:00:08-01:c2:80:00:00:00:0f are Management */
ptr = MV88E6390_G1_MONITOR_MGMT_CTL_PTR_0180C280000000XHI;
err = mv88e6390_g1_monitor_write(chip, ptr, 0xff);
if (err)
return err;
/* 01:c2:80:00:00:00:20-01:c2:80:00:00:00:27 are Management */
ptr = MV88E6390_G1_MONITOR_MGMT_CTL_PTR_0180C280000002XLO;
err = mv88e6390_g1_monitor_write(chip, ptr, 0xff);
if (err)
return err;
/* 01:c2:80:00:00:00:28-01:c2:80:00:00:00:2f are Management */
ptr = MV88E6390_G1_MONITOR_MGMT_CTL_PTR_0180C280000002XHI;
err = mv88e6390_g1_monitor_write(chip, ptr, 0xff);
if (err)
return err;
return 0;
}
/* Offset 0x1c: Global Control 2 */
static int mv88e6xxx_g1_ctl2_mask(struct mv88e6xxx_chip *chip, u16 mask,
u16 val)
{
u16 reg;
int err;
err = mv88e6xxx_g1_read(chip, MV88E6XXX_G1_CTL2, ®);
if (err)
return err;
reg &= ~mask;
reg |= val & mask;
return mv88e6xxx_g1_write(chip, MV88E6XXX_G1_CTL2, reg);
}
int mv88e6185_g1_set_cascade_port(struct mv88e6xxx_chip *chip, int port)
{
const u16 mask = MV88E6185_G1_CTL2_CASCADE_PORT_MASK;
return mv88e6xxx_g1_ctl2_mask(chip, mask, port << __bf_shf(mask));
}
int mv88e6085_g1_rmu_disable(struct mv88e6xxx_chip *chip)
{
return mv88e6xxx_g1_ctl2_mask(chip, MV88E6085_G1_CTL2_P10RM |
MV88E6085_G1_CTL2_RM_ENABLE, 0);
}
int mv88e6352_g1_rmu_disable(struct mv88e6xxx_chip *chip)
{
return mv88e6xxx_g1_ctl2_mask(chip, MV88E6352_G1_CTL2_RMU_MODE_MASK,
MV88E6352_G1_CTL2_RMU_MODE_DISABLED);
}
int mv88e6390_g1_rmu_disable(struct mv88e6xxx_chip *chip)
{
return mv88e6xxx_g1_ctl2_mask(chip, MV88E6390_G1_CTL2_RMU_MODE_MASK,
MV88E6390_G1_CTL2_RMU_MODE_DISABLED);
}
int mv88e6390_g1_stats_set_histogram(struct mv88e6xxx_chip *chip)
{
return mv88e6xxx_g1_ctl2_mask(chip, MV88E6390_G1_CTL2_HIST_MODE_MASK,
MV88E6390_G1_CTL2_HIST_MODE_RX |
MV88E6390_G1_CTL2_HIST_MODE_TX);
}
int mv88e6xxx_g1_set_device_number(struct mv88e6xxx_chip *chip, int index)
{
return mv88e6xxx_g1_ctl2_mask(chip,
MV88E6XXX_G1_CTL2_DEVICE_NUMBER_MASK,
index);
}
/* Offset 0x1d: Statistics Operation 2 */
int mv88e6xxx_g1_stats_wait(struct mv88e6xxx_chip *chip)
{
return mv88e6xxx_g1_wait(chip, MV88E6XXX_G1_STATS_OP,
MV88E6XXX_G1_STATS_OP_BUSY);
}
int mv88e6095_g1_stats_set_histogram(struct mv88e6xxx_chip *chip)
{
u16 val;
int err;
err = mv88e6xxx_g1_read(chip, MV88E6XXX_G1_STATS_OP, &val);
if (err)
return err;
val |= MV88E6XXX_G1_STATS_OP_HIST_RX_TX;
err = mv88e6xxx_g1_write(chip, MV88E6XXX_G1_STATS_OP, val);
return err;
}
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, MV88E6XXX_G1_STATS_OP,
MV88E6XXX_G1_STATS_OP_BUSY |
MV88E6XXX_G1_STATS_OP_CAPTURE_PORT |
MV88E6XXX_G1_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, MV88E6XXX_G1_STATS_OP,
MV88E6XXX_G1_STATS_OP_BUSY |
MV88E6XXX_G1_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, MV88E6XXX_G1_STATS_OP,
MV88E6XXX_G1_STATS_OP_BUSY |
MV88E6XXX_G1_STATS_OP_READ_CAPTURED | stat);
if (err)
return;
err = mv88e6xxx_g1_stats_wait(chip);
if (err)
return;
err = mv88e6xxx_g1_read(chip, MV88E6XXX_G1_STATS_COUNTER_32, ®);
if (err)
return;
value = reg << 16;
err = mv88e6xxx_g1_read(chip, MV88E6XXX_G1_STATS_COUNTER_01, ®);
if (err)
return;
*val = value | reg;
}
int mv88e6xxx_g1_stats_clear(struct mv88e6xxx_chip *chip)
{
int err;
u16 val;
err = mv88e6xxx_g1_read(chip, MV88E6XXX_G1_STATS_OP, &val);
if (err)
return err;
/* Keep the histogram mode bits */
val &= MV88E6XXX_G1_STATS_OP_HIST_RX_TX;
val |= MV88E6XXX_G1_STATS_OP_BUSY | MV88E6XXX_G1_STATS_OP_FLUSH_ALL;
err = mv88e6xxx_g1_write(chip, MV88E6XXX_G1_STATS_OP, val);
if (err)
return err;
/* Wait for the flush to complete. */
return mv88e6xxx_g1_stats_wait(chip);
}
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