linux/drivers/net/dsa/mv88e6xxx/global2_scratch.c

// SPDX-License-Identifier: GPL-2.0-or-later
/*
 * Marvell 88E6xxx Switch Global 2 Scratch & Misc Registers support
 *
 * Copyright (c) 2008 Marvell Semiconductor
 *
 * Copyright (c) 2017 National Instruments
 *      Brandon Streiff <[email protected]>
 */

#include "chip.h"
#include "global2.h"

/* Offset 0x1A: Scratch and Misc. Register */
static int mv88e6xxx_g2_scratch_read(struct mv88e6xxx_chip *chip, int reg,
				     u8 *data)
{ … }

static int mv88e6xxx_g2_scratch_write(struct mv88e6xxx_chip *chip, int reg,
				      u8 data)
{ … }

/**
 * mv88e6xxx_g2_scratch_get_bit - get a bit
 * @chip: chip private data
 * @base_reg: base of scratch bits
 * @offset: index of bit within the register
 * @set: is bit set?
 */
static int mv88e6xxx_g2_scratch_get_bit(struct mv88e6xxx_chip *chip,
					int base_reg, unsigned int offset,
					int *set)
{ … }

/**
 * mv88e6xxx_g2_scratch_set_bit - set (or clear) a bit
 * @chip: chip private data
 * @base_reg: base of scratch bits
 * @offset: index of bit within the register
 * @set: should this bit be set?
 *
 * Helper function for dealing with the direction and data registers.
 */
static int mv88e6xxx_g2_scratch_set_bit(struct mv88e6xxx_chip *chip,
					int base_reg, unsigned int offset,
					int set)
{ … }

/**
 * mv88e6352_g2_scratch_gpio_get_data - get data on gpio pin
 * @chip: chip private data
 * @pin: gpio index
 *
 * Return: 0 for low, 1 for high, negative error
 */
static int mv88e6352_g2_scratch_gpio_get_data(struct mv88e6xxx_chip *chip,
					      unsigned int pin)
{ … }

/**
 * mv88e6352_g2_scratch_gpio_set_data - set data on gpio pin
 * @chip: chip private data
 * @pin: gpio index
 * @value: value to set
 */
static int mv88e6352_g2_scratch_gpio_set_data(struct mv88e6xxx_chip *chip,
					      unsigned int pin, int value)
{ … }

/**
 * mv88e6352_g2_scratch_gpio_get_dir - get direction of gpio pin
 * @chip: chip private data
 * @pin: gpio index
 *
 * Return: 0 for output, 1 for input.
 */
static int mv88e6352_g2_scratch_gpio_get_dir(struct mv88e6xxx_chip *chip,
					     unsigned int pin)
{ … }

/**
 * mv88e6352_g2_scratch_gpio_set_dir - set direction of gpio pin
 * @chip: chip private data
 * @pin: gpio index
 * @input: should the gpio be an input, or an output?
 */
static int mv88e6352_g2_scratch_gpio_set_dir(struct mv88e6xxx_chip *chip,
					     unsigned int pin, bool input)
{ … }

/**
 * mv88e6352_g2_scratch_gpio_get_pctl - get pin control setting
 * @chip: chip private data
 * @pin: gpio index
 * @func: function number
 *
 * Note that the function numbers themselves may vary by chipset.
 */
static int mv88e6352_g2_scratch_gpio_get_pctl(struct mv88e6xxx_chip *chip,
					      unsigned int pin, int *func)
{ … }

/**
 * mv88e6352_g2_scratch_gpio_set_pctl - set pin control setting
 * @chip: chip private data
 * @pin: gpio index
 * @func: function number
 */
static int mv88e6352_g2_scratch_gpio_set_pctl(struct mv88e6xxx_chip *chip,
					      unsigned int pin, int func)
{ … }

const struct mv88e6xxx_gpio_ops mv88e6352_gpio_ops = …;

/**
 * mv88e6390_g2_scratch_gpio_set_smi - set gpio muxing for external smi
 * @chip: chip private data
 * @external: set mux for external smi, or free for gpio usage
 *
 * Some mv88e6xxx models have GPIO pins that may be configured as
 * an external SMI interface, or they may be made free for other
 * GPIO uses.
 */
int mv88e6390_g2_scratch_gpio_set_smi(struct mv88e6xxx_chip *chip,
				      bool external)
{ … }

/**
 * mv88e6393x_g2_scratch_gpio_set_smi - set gpio muxing for external smi
 * @chip: chip private data
 * @external: set mux for external smi, or free for gpio usage
 *
 * MV88E6191X/6193X/6393X GPIO pins 9 and 10 can be configured as an
 * external SMI interface or as regular GPIO-s.
 *
 * They however have a different register layout then the existing
 * function.
 */

int mv88e6393x_g2_scratch_gpio_set_smi(struct mv88e6xxx_chip *chip,
				       bool external)
{ … }

/**
 * mv88e6352_g2_scratch_port_has_serdes - indicate if a port can have a serdes
 * @chip: chip private data
 * @port: port number to check for serdes
 *
 * Indicates whether the port may have a serdes attached according to the
 * pin strapping. Returns negative error number, 0 if the port is not
 * configured to have a serdes, and 1 if the port is configured to have a
 * serdes attached.
 */
int mv88e6352_g2_scratch_port_has_serdes(struct mv88e6xxx_chip *chip, int port)
{ … }