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/*
* 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>
*
* Copyright (c) 2017 National Instruments
* Brandon Streiff <brandon.streiff@ni.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 "global2.h"
/* Offset 0x16: AVB Command Register
* Offset 0x17: AVB Data Register
*
* There are two different versions of this register interface:
* "6352": 3-bit "op" field, 4-bit "port" field.
* "6390": 2-bit "op" field, 5-bit "port" field.
*
* The "op" codes are different between the two, as well as the special
* port fields for global PTP and TAI configuration.
*/
/* mv88e6xxx_g2_avb_read -- Read one or multiple 16-bit words.
* The hardware supports snapshotting up to four contiguous registers.
*/
static int mv88e6xxx_g2_avb_read(struct mv88e6xxx_chip *chip, u16 readop,
u16 *data, int len)
{
int err;
int i;
/* Hardware can only snapshot four words. */
if (len > 4)
return -E2BIG;
err = mv88e6xxx_g2_update(chip, MV88E6352_G2_AVB_CMD, readop);
if (err)
return err;
for (i = 0; i < len; ++i) {
err = mv88e6xxx_g2_read(chip, MV88E6352_G2_AVB_DATA,
&data[i]);
if (err)
return err;
}
return 0;
}
/* mv88e6xxx_g2_avb_write -- Write one 16-bit word. */
static int mv88e6xxx_g2_avb_write(struct mv88e6xxx_chip *chip, u16 writeop,
u16 data)
{
int err;
err = mv88e6xxx_g2_write(chip, MV88E6352_G2_AVB_DATA, data);
if (err)
return err;
return mv88e6xxx_g2_update(chip, MV88E6352_G2_AVB_CMD, writeop);
}
static int mv88e6352_g2_avb_port_ptp_read(struct mv88e6xxx_chip *chip,
int port, int addr, u16 *data,
int len)
{
u16 readop = (len == 1 ? MV88E6352_G2_AVB_CMD_OP_READ :
MV88E6352_G2_AVB_CMD_OP_READ_INCR) |
(port << 8) | (MV88E6352_G2_AVB_CMD_BLOCK_PTP << 5) |
addr;
return mv88e6xxx_g2_avb_read(chip, readop, data, len);
}
static int mv88e6352_g2_avb_port_ptp_write(struct mv88e6xxx_chip *chip,
int port, int addr, u16 data)
{
u16 writeop = MV88E6352_G2_AVB_CMD_OP_WRITE | (port << 8) |
(MV88E6352_G2_AVB_CMD_BLOCK_PTP << 5) | addr;
return mv88e6xxx_g2_avb_write(chip, writeop, data);
}
static int mv88e6352_g2_avb_ptp_read(struct mv88e6xxx_chip *chip, int addr,
u16 *data, int len)
{
return mv88e6352_g2_avb_port_ptp_read(chip,
MV88E6352_G2_AVB_CMD_PORT_PTPGLOBAL,
addr, data, len);
}
static int mv88e6352_g2_avb_ptp_write(struct mv88e6xxx_chip *chip, int addr,
u16 data)
{
return mv88e6352_g2_avb_port_ptp_write(chip,
MV88E6352_G2_AVB_CMD_PORT_PTPGLOBAL,
addr, data);
}
static int mv88e6352_g2_avb_tai_read(struct mv88e6xxx_chip *chip, int addr,
u16 *data, int len)
{
return mv88e6352_g2_avb_port_ptp_read(chip,
MV88E6352_G2_AVB_CMD_PORT_TAIGLOBAL,
addr, data, len);
}
static int mv88e6352_g2_avb_tai_write(struct mv88e6xxx_chip *chip, int addr,
u16 data)
{
return mv88e6352_g2_avb_port_ptp_write(chip,
MV88E6352_G2_AVB_CMD_PORT_TAIGLOBAL,
addr, data);
}
const struct mv88e6xxx_avb_ops mv88e6352_avb_ops = {
.port_ptp_read = mv88e6352_g2_avb_port_ptp_read,
.port_ptp_write = mv88e6352_g2_avb_port_ptp_write,
.ptp_read = mv88e6352_g2_avb_ptp_read,
.ptp_write = mv88e6352_g2_avb_ptp_write,
.tai_read = mv88e6352_g2_avb_tai_read,
.tai_write = mv88e6352_g2_avb_tai_write,
};
static int mv88e6390_g2_avb_port_ptp_read(struct mv88e6xxx_chip *chip,
int port, int addr, u16 *data,
int len)
{
u16 readop = (len == 1 ? MV88E6390_G2_AVB_CMD_OP_READ :
MV88E6390_G2_AVB_CMD_OP_READ_INCR) |
(port << 8) | (MV88E6352_G2_AVB_CMD_BLOCK_PTP << 5) |
addr;
return mv88e6xxx_g2_avb_read(chip, readop, data, len);
}
static int mv88e6390_g2_avb_port_ptp_write(struct mv88e6xxx_chip *chip,
int port, int addr, u16 data)
{
u16 writeop = MV88E6390_G2_AVB_CMD_OP_WRITE | (port << 8) |
(MV88E6352_G2_AVB_CMD_BLOCK_PTP << 5) | addr;
return mv88e6xxx_g2_avb_write(chip, writeop, data);
}
static int mv88e6390_g2_avb_ptp_read(struct mv88e6xxx_chip *chip, int addr,
u16 *data, int len)
{
return mv88e6390_g2_avb_port_ptp_read(chip,
MV88E6390_G2_AVB_CMD_PORT_PTPGLOBAL,
addr, data, len);
}
static int mv88e6390_g2_avb_ptp_write(struct mv88e6xxx_chip *chip, int addr,
u16 data)
{
return mv88e6390_g2_avb_port_ptp_write(chip,
MV88E6390_G2_AVB_CMD_PORT_PTPGLOBAL,
addr, data);
}
static int mv88e6390_g2_avb_tai_read(struct mv88e6xxx_chip *chip, int addr,
u16 *data, int len)
{
return mv88e6390_g2_avb_port_ptp_read(chip,
MV88E6390_G2_AVB_CMD_PORT_TAIGLOBAL,
addr, data, len);
}
static int mv88e6390_g2_avb_tai_write(struct mv88e6xxx_chip *chip, int addr,
u16 data)
{
return mv88e6390_g2_avb_port_ptp_write(chip,
MV88E6390_G2_AVB_CMD_PORT_TAIGLOBAL,
addr, data);
}
const struct mv88e6xxx_avb_ops mv88e6390_avb_ops = {
.port_ptp_read = mv88e6390_g2_avb_port_ptp_read,
.port_ptp_write = mv88e6390_g2_avb_port_ptp_write,
.ptp_read = mv88e6390_g2_avb_ptp_read,
.ptp_write = mv88e6390_g2_avb_ptp_write,
.tai_read = mv88e6390_g2_avb_tai_read,
.tai_write = mv88e6390_g2_avb_tai_write,
};
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