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/* SPDX-License-Identifier: GPL-2.0+ */
/*
* ENETC ethernet controller driver
* Copyright 2017-2019 NXP
*/
#ifndef _ENETC_H
#define _ENETC_H
#include <linux/bitops.h>
#define enetc_dbg(dev, fmt, args...) debug("%s:" fmt, dev->name, ##args)
/* PCI function IDs */
#define PCI_DEVICE_ID_ENETC_ETH 0xE100
#define PCI_DEVICE_ID_ENETC_MDIO 0xEE01
/* ENETC Ethernet controller registers */
/* Station interface register offsets */
#define ENETC_SIMR 0x000
#define ENETC_SIMR_EN BIT(31)
#define ENETC_SICAR0 0x040
/* write cache cfg: snoop, no allocate, data & BD coherent */
#define ENETC_SICAR_WR_CFG 0x6767
/* read cache cfg: coherent copy, look up, don't alloc in cache */
#define ENETC_SICAR_RD_CFG 0x27270000
#define ENETC_SIROCT 0x300
#define ENETC_SIRFRM 0x308
#define ENETC_SITOCT 0x320
#define ENETC_SITFRM 0x328
/* Rx/Tx Buffer Descriptor Ring registers */
enum enetc_bdr_type {TX, RX};
#define ENETC_BDR(type, n, off) (0x8000 + (type) * 0x100 + (n) * 0x200 + (off))
#define ENETC_BDR_IDX_MASK 0xffff
/* Rx BDR reg offsets */
#define ENETC_RBMR 0x00
#define ENETC_RBMR_EN BIT(31)
#define ENETC_RBBSR 0x08
/* initial consumer index for Rx BDR */
#define ENETC_RBCIR 0x0c
#define ENETC_RBBAR0 0x10
#define ENETC_RBBAR1 0x14
#define ENETC_RBPIR 0x18
#define ENETC_RBLENR 0x20
/* Tx BDR reg offsets */
#define ENETC_TBMR 0x00
#define ENETC_TBMR_EN BIT(31)
#define ENETC_TBBAR0 0x10
#define ENETC_TBBAR1 0x14
#define ENETC_TBPIR 0x18
#define ENETC_TBCIR 0x1c
#define ENETC_TBLENR 0x20
/* Port registers offset */
#define ENETC_PORT_REGS_OFF 0x10000
/* Port registers */
#define ENETC_PMR 0x0000
#define ENETC_PMR_SI0_EN BIT(16)
#define ENETC_PSIPMMR 0x0018
#define ENETC_PSIPMAR0 0x0100
#define ENETC_PSIPMAR1 0x0104
#define ENETC_PCAPR0 0x0900
#define ENETC_PCAPRO_MDIO BIT(11)
#define ENETC_PSICFGR(n) (0x0940 + (n) * 0x10)
#define ENETC_PSICFGR_SET_TXBDR(val) ((val) & 0xff)
#define ENETC_PSICFGR_SET_RXBDR(val) (((val) & 0xff) << 16)
/* MAC configuration */
#define ENETC_PM_CC 0x8008
#define ENETC_PM_CC_DEFAULT 0x0810
#define ENETC_PM_CC_RX_TX_EN 0x8813
#define ENETC_PM_MAXFRM 0x8014
#define ENETC_RX_MAXFRM_SIZE PKTSIZE_ALIGN
#define ENETC_PM_IMDIO_BASE 0x8030
#define ENETC_PM_IF_MODE 0x8300
#define ENETC_PM_IF_MODE_RG BIT(2)
#define ENETC_PM_IF_MODE_AN_ENA BIT(15)
#define ENETC_PM_IF_IFMODE_MASK GENMASK(1, 0)
/* buffer descriptors count must be multiple of 8 and aligned to 128 bytes */
#define ENETC_BD_CNT CONFIG_SYS_RX_ETH_BUFFER
#define ENETC_BD_ALIGN 128
/* single pair of Rx/Tx rings */
#define ENETC_RX_BDR_CNT 1
#define ENETC_TX_BDR_CNT 1
#define ENETC_RX_BDR_ID 0
#define ENETC_TX_BDR_ID 0
/* Tx buffer descriptor */
struct enetc_tx_bd {
__le64 addr;
__le16 buf_len;
__le16 frm_len;
__le16 err_csum;
__le16 flags;
};
#define ENETC_TXBD_FLAGS_F BIT(15)
#define ENETC_POLL_TRIES 32000
/* Rx buffer descriptor */
union enetc_rx_bd {
/* SW provided BD format */
struct {
__le64 addr;
u8 reserved[8];
} w;
/* ENETC returned BD format */
struct {
__le16 inet_csum;
__le16 parse_summary;
__le32 rss_hash;
__le16 buf_len;
__le16 vlan_opt;
union {
struct {
__le16 flags;
__le16 error;
};
__le32 lstatus;
};
} r;
};
#define ENETC_RXBD_STATUS_R(status) (((status) >> 30) & 0x1)
#define ENETC_RXBD_STATUS_F(status) (((status) >> 31) & 0x1)
#define ENETC_RXBD_STATUS_ERRORS(status) (((status) >> 16) & 0xff)
#define ENETC_RXBD_STATUS(flags) ((flags) << 16)
/* Tx/Rx ring info */
struct bd_ring {
void *cons_idx;
void *prod_idx;
/* next BD index to use */
int next_prod_idx;
int next_cons_idx;
int bd_count;
};
/* ENETC private structure */
struct enetc_priv {
struct enetc_tx_bd *enetc_txbd;
union enetc_rx_bd *enetc_rxbd;
void *regs_base; /* base ENETC registers */
void *port_regs; /* base ENETC port registers */
/* Rx/Tx buffer descriptor rings info */
struct bd_ring tx_bdr;
struct bd_ring rx_bdr;
int if_type;
struct mii_dev imdio;
struct phy_device *phy;
};
/* register accessors */
#define enetc_read_reg(x) readl((x))
#define enetc_write_reg(x, val) writel((val), (x))
#define enetc_read(priv, off) enetc_read_reg((priv)->regs_base + (off))
#define enetc_write(priv, off, v) \
enetc_write_reg((priv)->regs_base + (off), v)
/* port register accessors */
#define enetc_port_regs(priv, off) ((priv)->port_regs + (off))
#define enetc_read_port(priv, off) \
enetc_read_reg(enetc_port_regs((priv), (off)))
#define enetc_write_port(priv, off, v) \
enetc_write_reg(enetc_port_regs((priv), (off)), v)
/* BDR register accessors, see ENETC_BDR() */
#define enetc_bdr_read(priv, t, n, off) \
enetc_read(priv, ENETC_BDR(t, n, off))
#define enetc_bdr_write(priv, t, n, off, val) \
enetc_write(priv, ENETC_BDR(t, n, off), val)
/* PCS / internal SoC PHY ID, it defaults to 0 on all interfaces */
#define ENETC_PCS_PHY_ADDR 0
/* PCS registers */
#define ENETC_PCS_CR 0x00
#define ENETC_PCS_CR_RESET_AN 0x1200
#define ENETC_PCS_CR_DEF_VAL 0x0140
#define ENETC_PCS_CR_RST BIT(15)
#define ENETC_PCS_DEV_ABILITY 0x04
#define ENETC_PCS_DEV_ABILITY_SGMII 0x4001
#define ENETC_PCS_DEV_ABILITY_SXGMII 0x5001
#define ENETC_PCS_LINK_TIMER1 0x12
#define ENETC_PCS_LINK_TIMER1_VAL 0x06a0
#define ENETC_PCS_LINK_TIMER2 0x13
#define ENETC_PCS_LINK_TIMER2_VAL 0x0003
#define ENETC_PCS_IF_MODE 0x14
#define ENETC_PCS_IF_MODE_SGMII BIT(0)
#define ENETC_PCS_IF_MODE_SGMII_AN BIT(1)
#define ENETC_PCS_IF_MODE_SPEED_1G BIT(3)
/* PCS replicator block for USXGMII */
#define ENETC_PCS_DEVAD_REPL 0x1f
/* ENETC external MDIO registers */
#define ENETC_MDIO_BASE 0x1c00
#define ENETC_MDIO_CFG 0x00
#define ENETC_EMDIO_CFG_C22 0x00809508
#define ENETC_EMDIO_CFG_C45 0x00809548
#define ENETC_EMDIO_CFG_RD_ER BIT(1)
#define ENETC_EMDIO_CFG_BSY BIT(0)
#define ENETC_MDIO_CTL 0x04
#define ENETC_MDIO_CTL_READ BIT(15)
#define ENETC_MDIO_DATA 0x08
#define ENETC_MDIO_STAT 0x0c
#define ENETC_MDIO_READ_ERR 0xffff
struct enetc_mdio_priv {
void *regs_base;
};
/*
* these functions are implemented by ENETC_MDIO and are re-used by ENETC driver
* to drive serdes / internal SoC PHYs
*/
int enetc_mdio_read_priv(struct enetc_mdio_priv *priv, int addr, int devad,
int reg);
int enetc_mdio_write_priv(struct enetc_mdio_priv *priv, int addr, int devad,
int reg, u16 val);
/* sets up primary MAC addresses in DT/IERB */
void fdt_fixup_enetc_mac(void *blob);
#endif /* _ENETC_H */
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