path: root/drivers/net/dsa/rtl8366rb.c

// SPDX-License-Identifier: GPL-2.0
/* Realtek SMI subdriver for the Realtek RTL8366RB ethernet switch
 *
 * This is a sparsely documented chip, the only viable documentation seems
 * to be a patched up code drop from the vendor that appear in various
 * GPL source trees.
 *
 * Copyright (C) 2017 Linus Walleij <linus.walleij@linaro.org>
 * Copyright (C) 2009-2010 Gabor Juhos <juhosg@openwrt.org>
 * Copyright (C) 2010 Antti Seppälä <a.seppala@gmail.com>
 * Copyright (C) 2010 Roman Yeryomin <roman@advem.lv>
 * Copyright (C) 2011 Colin Leitner <colin.leitner@googlemail.com>
 */

#include <linux/bitops.h>
#include <linux/etherdevice.h>
#include <linux/interrupt.h>
#include <linux/irqdomain.h>
#include <linux/irqchip/chained_irq.h>
#include <linux/of_irq.h>
#include <linux/regmap.h>

#include "realtek-smi-core.h"

#define RTL8366RB_PORT_NUM_CPU		5
#define RTL8366RB_NUM_PORTS		6
#define RTL8366RB_PHY_NO_MAX		4
#define RTL8366RB_PHY_ADDR_MAX		31

/* Switch Global Configuration register */
#define RTL8366RB_SGCR				0x0000
#define RTL8366RB_SGCR_EN_BC_STORM_CTRL		BIT(0)
#define RTL8366RB_SGCR_MAX_LENGTH(a)		((a) << 4)
#define RTL8366RB_SGCR_MAX_LENGTH_MASK		RTL8366RB_SGCR_MAX_LENGTH(0x3)
#define RTL8366RB_SGCR_MAX_LENGTH_1522		RTL8366RB_SGCR_MAX_LENGTH(0x0)
#define RTL8366RB_SGCR_MAX_LENGTH_1536		RTL8366RB_SGCR_MAX_LENGTH(0x1)
#define RTL8366RB_SGCR_MAX_LENGTH_1552		RTL8366RB_SGCR_MAX_LENGTH(0x2)
#define RTL8366RB_SGCR_MAX_LENGTH_16000		RTL8366RB_SGCR_MAX_LENGTH(0x3)
#define RTL8366RB_SGCR_EN_VLAN			BIT(13)
#define RTL8366RB_SGCR_EN_VLAN_4KTB		BIT(14)

/* Port Enable Control re