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/* SPDX-License-Identifier: GPL-2.0-only */
/*
* Copyright (C) 2022 Schneider Electric
*
* Clément Léger <clement.leger@bootlin.com>
*/
#include <linux/clk.h>
#include <linux/debugfs.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/of_mdio.h>
#include <linux/platform_device.h>
#include <linux/pcs-rzn1-miic.h>
#include <net/dsa.h>
#define A5PSW_REVISION 0x0
#define A5PSW_PORT_OFFSET(port) (0x400 * (port))
#define A5PSW_PORT_ENA 0x8
#define A5PSW_PORT_ENA_RX_SHIFT 16
#define A5PSW_PORT_ENA_TX_RX(port) (BIT((port) + A5PSW_PORT_ENA_RX_SHIFT) | \
BIT(port))
#define A5PSW_UCAST_DEF_MASK 0xC
#define A5PSW_VLAN_VERIFY 0x10
#define A5PSW_VLAN_VERI_SHIFT 0
#define A5PSW_VLAN_DISC_SHIFT 16
#define A5PSW_BCAST_DEF_MASK 0x14
#define A5PSW_MCAST_DEF_MASK 0x18
#define A5PSW_INPUT_LEARN 0x1C
#define A5PSW_INPUT_LEARN_DIS(p) BIT((p) + 16)
#define A5PSW_INPUT_LEARN_BLOCK(p) BIT(p)
#define A5PSW_MGMT_CFG 0x20
#define A5PSW_MGMT_CFG_DISCARD BIT(7)
#define A5PSW_MODE_CFG 0x24
#define A5PSW_MODE_STATS_RESET BIT(31)
#define A5PSW_VLAN_IN_MODE 0x28
#define A5PSW_VLAN_IN_MODE_PORT_SHIFT(port) ((port) * 2)
#define A5PSW_VLAN_IN_MODE_PORT(port) (GENMASK(1, 0) << \
A5PSW_VLAN_IN_MODE_PORT_SHIFT(port))
#define A5PSW_VLAN_IN_MODE_SINGLE_PASSTHROUGH 0x0
#define A5PSW_VLAN_IN_MODE_SINGLE_REPLACE 0x1
#define A5PSW_VLAN_IN_MODE_TAG_ALWAYS 0x2
#define A5PSW_VLAN_OUT_MODE 0x2C
#define A5PSW_VLAN_OUT_MODE_PORT(port) (GENMASK(1, 0) << ((port) * 2))
#define A5PSW_VLAN_OUT_MODE_DIS 0x0
#define A5PSW_VLAN_OUT_MODE_STRIP 0x1
#define A5PSW_VLAN_OUT_MODE_TAG_THROUGH 0x2
#define A5PSW_VLAN_OUT_MODE_TRANSPARENT 0x3
#define A5PSW_VLAN_IN_MODE_ENA 0x30
#define A5PSW_VLAN_TAG_ID 0x34
#define A5PSW_SYSTEM_TAGINFO(port) (0x200 + A5PSW_PORT_OFFSET(port))
#define A5PSW_AUTH_PORT(port) (0x240 + 4 * (port))
#define A5PSW_AUTH_PORT_AUTHORIZED BIT(0)
#define A5PSW_VLAN_RES(entry) (0x280 + 4 * (entry))
#define A5PSW_VLAN_RES_WR_PORTMASK BIT(30)
#define A5PSW_VLAN_RES_WR_TAGMASK BIT(29)
#define A5PSW_VLAN_RES_RD_TAGMASK BIT(28)
#define A5PSW_VLAN_RES_ID GENMASK(16, 5)
#define A5PSW_VLAN_RES_PORTMASK GENMASK(4, 0)
#define A5PSW_RXMATCH_CONFIG(port) (0x3e80 + 4 * (port))
#define A5PSW_RXMATCH_CONFIG_PATTERN(p) BIT(p)
#define A5PSW_PATTERN_CTRL(p) (0x3eb0 + 4 * (p))
#define A5PSW_PATTERN_CTRL_MGMTFWD BIT(1)
#define A5PSW_LK_CTRL 0x400
#define A5PSW_LK_ADDR_CTRL_BLOCKING BIT(0)
#define A5PSW_LK_ADDR_CTRL_LEARNING BIT(1)
#define A5PSW_LK_ADDR_CTRL_AGEING BIT(2)
#define A5PSW_LK_ADDR_CTRL_ALLOW_MIGR BIT(3)
#define A5PSW_LK_ADDR_CTRL_CLEAR_TABLE BIT(6)
#define A5PSW_LK_ADDR_CTRL 0x408
#define A5PSW_LK_ADDR_CTRL_BUSY BIT(31)
#define A5PSW_LK_ADDR_CTRL_DELETE_PORT BIT(30)
#define A5PSW_LK_ADDR_CTRL_CLEAR BIT(29)
#define A5PSW_LK_ADDR_CTRL_LOOKUP BIT(28)
#define A5PSW_LK_ADDR_CTRL_WAIT BIT(27)
#define A5PSW_LK_ADDR_CTRL_READ BIT(26)
#define A5PSW_LK_ADDR_CTRL_WRITE BIT(25)
#define A5PSW_LK_ADDR_CTRL_ADDRESS GENMASK(12, 0)
#define A5PSW_LK_DATA_LO 0x40C
#define A5PSW_LK_DATA_HI 0x410
#define A5PSW_LK_DATA_HI_VALID BIT(16)
#define A5PSW_LK_DATA_HI_PORT BIT(16)
#define A5PSW_LK_LEARNCOUNT 0x418
#define A5PSW_LK_LEARNCOUNT_COUNT GENMASK(13, 0)
#define A5PSW_LK_LEARNCOUNT_MODE GENMASK(31, 30)
#define A5PSW_LK_LEARNCOUNT_MODE_SET 0x0
#define A5PSW_LK_LEARNCOUNT_MODE_INC 0x1
#define A5PSW_LK_LEARNCOUNT_MODE_DEC 0x2
#define A5PSW_MGMT_TAG_CFG 0x480
#define A5PSW_MGMT_TAG_CFG_TAGFIELD GENMASK(31, 16)
#define A5PSW_MGMT_TAG_CFG_ALL_FRAMES BIT(1)
#define A5PSW_MGMT_TAG_CFG_ENABLE BIT(0)
#define A5PSW_LK_AGETIME 0x41C
#define A5PSW_LK_AGETIME_MASK GENMASK(23, 0)
#define A5PSW_MDIO_CFG_STATUS 0x700
#define A5PSW_MDIO_CFG_STATUS_CLKDIV GENMASK(15, 7)
#define A5PSW_MDIO_CFG_STATUS_READERR BIT(1)
#define A5PSW_MDIO_CFG_STATUS_BUSY BIT(0)
#define A5PSW_MDIO_COMMAND 0x704
/* Register is named TRAININIT in datasheet and should be set when reading */
#define A5PSW_MDIO_COMMAND_READ BIT(15)
#define A5PSW_MDIO_COMMAND_PHY_ADDR GENMASK(9, 5)
#define A5PSW_MDIO_COMMAND_REG_ADDR GENMASK(4, 0)
#define A5PSW_MDIO_DATA 0x708
#define A5PSW_MDIO_DATA_MASK GENMASK(15, 0)
#define A5PSW_CMD_CFG(port) (0x808 + A5PSW_PORT_OFFSET(port))
#define A5PSW_CMD_CFG_CNTL_FRM_ENA BIT(23)
#define A5PSW_CMD_CFG_SW_RESET BIT(13)
#define A5PSW_CMD_CFG_TX_CRC_APPEND BIT(11)
#define A5PSW_CMD_CFG_HD_ENA BIT(10)
#define A5PSW_CMD_CFG_PAUSE_IGNORE BIT(8)
#define A5PSW_CMD_CFG_CRC_FWD BIT(6)
#define A5PSW_CMD_CFG_ETH_SPEED BIT(3)
#define A5PSW_CMD_CFG_RX_ENA BIT(1)
#define A5PSW_CMD_CFG_TX_ENA BIT(0)
#define A5PSW_FRM_LENGTH(port) (0x814 + A5PSW_PORT_OFFSET(port))
#define A5PSW_FRM_LENGTH_MASK GENMASK(13, 0)
#define A5PSW_STATUS(port) (0x840 + A5PSW_PORT_OFFSET(port))
#define A5PSW_STATS_HIWORD 0x900
/* Stats */
#define A5PSW_aFramesTransmittedOK 0x868
#define A5PSW_aFramesReceivedOK 0x86C
#define A5PSW_aFrameCheckSequenceErrors 0x870
#define A5PSW_aAlignmentErrors 0x874
#define A5PSW_aOctetsTransmittedOK 0x878
#define A5PSW_aOctetsReceivedOK 0x87C
#define A5PSW_aTxPAUSEMACCtrlFrames 0x880
#define A5PSW_aRxPAUSEMACCtrlFrames 0x884
/* If */
#define A5PSW_ifInErrors 0x888
#define A5PSW_ifOutErrors 0x88C
#define A5PSW_ifInUcastPkts 0x890
#define A5PSW_ifInMulticastPkts 0x894
#define A5PSW_ifInBroadcastPkts 0x898
#define A5PSW_ifOutDiscards 0x89C
#define A5PSW_ifOutUcastPkts 0x8A0
#define A5PSW_ifOutMulticastPkts 0x8A4
#define A5PSW_ifOutBroadcastPkts 0x8A8
/* Ether */
#define A5PSW_etherStatsDropEvents 0x8AC
#define A5PSW_etherStatsOctets 0x8B0
#define A5PSW_etherStatsPkts 0x8B4
#define A5PSW_etherStatsUndersizePkts 0x8B8
#define A5PSW_etherStatsOversizePkts 0x8BC
#define A5PSW_etherStatsPkts64Octets 0x8C0
#define A5PSW_etherStatsPkts65to127Octets 0x8C4
#define A5PSW_etherStatsPkts128to255Octets 0x8C8
#define A5PSW_etherStatsPkts256to511Octets 0x8CC
#define A5PSW_etherStatsPkts512to1023Octets 0x8D0
#define A5PSW_etherStatsPkts1024to1518Octets 0x8D4
#define A5PSW_etherStatsPkts1519toXOctets 0x8D8
#define A5PSW_etherStatsJabbers 0x8DC
#define A5PSW_etherStatsFragments 0x8E0
#define A5PSW_VLANReceived 0x8E8
#define A5PSW_VLANTransmitted 0x8EC
#define A5PSW_aDeferred 0x910
#define A5PSW_aMultipleCollisions 0x914
#define A5PSW_aSingleCollisions 0x918
#define A5PSW_aLateCollisions 0x91C
#define A5PSW_aExcessiveCollisions 0x920
#define A5PSW_aCarrierSenseErrors 0x924
#define A5PSW_VLAN_TAG(prio, id) (((prio) << 12) | (id))
#define A5PSW_PORTS_NUM 5
#define A5PSW_CPU_PORT (A5PSW_PORTS_NUM - 1)
#define A5PSW_MDIO_DEF_FREQ 2500000
#define A5PSW_MDIO_TIMEOUT 100
#define A5PSW_JUMBO_LEN (10 * SZ_1K)
#define A5PSW_MDIO_CLK_DIV_MIN 5
#define A5PSW_TAG_LEN 8
#define A5PSW_VLAN_COUNT 32
/* Ensure enough space for 2 VLAN tags */
#define A5PSW_EXTRA_MTU_LEN (A5PSW_TAG_LEN + 8)
#define A5PSW_MAX_MTU (A5PSW_JUMBO_LEN - A5PSW_EXTRA_MTU_LEN)
#define A5PSW_PATTERN_MGMTFWD 0
#define A5PSW_LK_BUSY_USEC_POLL 10
#define A5PSW_CTRL_TIMEOUT 1000
#define A5PSW_TABLE_ENTRIES 8192
struct fdb_entry {
u8 mac[ETH_ALEN];
u16 valid:1;
u16 is_static:1;
u16 prio:3;
u16 port_mask:5;
u16 reserved:6;
} __packed;
union lk_data {
struct {
u32 lo;
u32 hi;
};
struct fdb_entry entry;
};
/**
* struct a5psw - switch struct
* @base: Base address of the switch
* @hclk: hclk_switch clock
* @clk: clk_switch clock
* @dev: Device associated to the switch
* @mii_bus: MDIO bus struct
* @mdio_freq: MDIO bus frequency requested
* @pcs: Array of PCS connected to the switch ports (not for the CPU)
* @ds: DSA switch struct
* @stats_lock: lock to access statistics (shared HI counter)
* @lk_lock: Lock for the lookup table
* @reg_lock: Lock for register read-modify-write operation
* @bridged_ports: Mask of ports that are bridged and should be flooded
* @br_dev: Bridge net device
*/
struct a5psw {
void __iomem *base;
struct clk *hclk;
struct clk *clk;
struct device *dev;
struct mii_bus *mii_bus;
struct phylink_pcs *pcs[A5PSW_PORTS_NUM - 1];
struct dsa_switch ds;
struct mutex lk_lock;
spinlock_t reg_lock;
u32 bridged_ports;
struct net_device *br_dev;
};
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