/*
* Copyright(c) 2015 EZchip Technologies.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* The full GNU General Public License is included in this distribution in
* the file called "COPYING".
*/
#ifndef _NPS_ENET_H
#define _NPS_ENET_H
/* default values */
#define NPS_ENET_NAPI_POLL_WEIGHT 0x2
#define NPS_ENET_MAX_FRAME_LENGTH 0x3FFF
#define NPS_ENET_GE_MAC_CFG_0_TX_FC_RETR 0x7
#define NPS_ENET_GE_MAC_CFG_0_RX_IFG 0x5
#define NPS_ENET_GE_MAC_CFG_0_TX_IFG 0xC
#define NPS_ENET_GE_MAC_CFG_0_TX_PR_LEN 0x7
#define NPS_ENET_GE_MAC_CFG_2_STAT_EN 0x3
#define NPS_ENET_GE_MAC_CFG_3_RX_IFG_TH 0x14
#define NPS_ENET_GE_MAC_CFG_3_MAX_LEN 0x3FFC
#define NPS_ENET_ENABLE 1
#define NPS_ENET_DISABLE 0
/* register definitions */
#define NPS_ENET_REG_TX_CTL 0x800
#define NPS_ENET_REG_TX_BUF 0x808
#define NPS_ENET_REG_RX_CTL 0x810
#define NPS_ENET_REG_RX_BUF 0x818
#define NPS_ENET_REG_BUF_INT_ENABLE 0x8C0
#define NPS_ENET_REG_GE_MAC_CFG_0 0x1000
#define NPS_ENET_REG_GE_MAC_CFG_1 0x1004
#define NPS_ENET_REG_GE_MAC_CFG_2 0x1008
#define NPS_ENET_REG_GE_MAC_CFG_3 0x100C
#define NPS_ENET_REG_GE_RST 0x1400
#define NPS_ENET_REG_PHASE_FIFO_CTL 0x1404
/* Tx control register */
struct nps_enet_tx_ctl {
union {
/* ct: SW sets to indicate frame ready in Tx buffer for
* transmission. HW resets to when transmission done
* et: Transmit error
* nt: Length in bytes of Tx frame loaded to Tx buffer
*/
struct {
u32
__reserved_1:16,
ct:1,
et:1,
__reserved_2:3,
nt:11;
};
u32 value;
};
};
/* Rx control register */
struct nps_enet_rx_ctl {
union {
/* cr: HW sets to indicate frame ready in Rx buffer.
* SW resets to indicate host read received frame
* and new frames can be written to Rx buffer
* er: Rx error indication
* crc: Rx CRC error indication
* nr: Length in bytes of Rx frame loaded by MAC to Rx buffer
*/
struct {
u32
__reserved_1:16,
cr:1,
er:1,
crc:1,
__reserved_2:2,
nr:11;
};
u32 value;
};
};
/* Interrupt enable for data buffer events register */
struct nps_enet_buf_int_enable {
union {
/* tx_done: Interrupt generation in the case when new frame
* is ready in Rx buffer
* rx_rdy: Interrupt generation in the case when current frame
* was read from TX buffer
*/
struct {
u32
__reserved:30,
tx_done:1,
rx_rdy:1;
};
u32 value;
};
};
/* Gbps Eth MAC Configuration 0 register */
struct nps_enet_ge_mac_cfg_0 {
union {
/* tx_pr_len: Transmit preamble length in bytes
* tx_ifg_nib: Tx idle pattern
* nib_mode: Nibble (4-bit) Mode
* rx_pr_check_en: Receive preamble Check Enable
* tx_ifg: Transmit inter-Frame Gap
* rx_ifg: Receive inter-Frame Gap
* tx_fc_retr: Transmit Flow Control Retransmit Mode
* rx_length_check_en: Receive Length Check Enable
* rx_crc_ignore: Results of the CRC check are ignored
* rx_crc_strip: MAC strips the CRC from received frames
* rx_fc_en: Receive Flow Control Enable
* tx_crc_en: Transmit CRC Enabled
* tx_pad_en: Transmit Padding Enable
* tx_cf_en: Transmit Flow Control Enable
* tx_en: Transmit Enable
* rx_en: Receive Enable
*/
struct {
u32
tx_pr_len:4,
tx_ifg_nib:4,
nib_mode:1,
rx_pr_check_en:1,
tx_ifg:6,
rx_ifg:4,
tx_fc_retr:3,
rx_length_check_en:1,
rx_crc_ignore:1,
rx_crc_strip:1,
rx_fc_en:1,
tx_crc_en:1,
tx_pad_en:1,
tx_fc_en:1,
tx_en:1,
rx_en:1;
};
u32 value;
};
};
/* Gbps Eth MAC Configuration 1 register */
struct nps_enet_ge_mac_cfg_1 {
union {
/* octet_3: MAC address octet 3
* octet_2: MAC address octet 2
* octet_1: MAC address octet 1
* octet_0: MAC address octet 0
*/
struct {
u32
octet_3:8,
octet_2:8,
octet_1:8,
octet_0:8;
};
u32 value;
};
};
/* Gbps Eth MAC Configuration 2 register */
struct nps_enet_ge_mac_cfg_2 {
union {
/* transmit_flush_en: MAC flush enable
* stat_en: RMON statistics interface enable
* disc_da: Discard frames with DA different
* from MAC address
* disc_bc: Discard broadcast frames
* disc_mc: Discard multicast frames
* octet_5: MAC address octet 5
* octet_4: MAC address octet 4
*/
struct {
u32
transmit_flush_en:1,
__reserved_1:5,
stat_en:2,
__reserved_2:1,
disc_da:1,
disc_bc:1,
disc_mc:1,
__reserved_3:4,
octet_5:8,
octet_4:8;
};
u32 value;
};
};
/* Gbps Eth MAC Configuration 3 register */
struct nps_enet_ge_mac_cfg_3 {
union {
/* ext_oob_cbfc_sel: Selects one of the 4 profiles for
* extended OOB in-flow-control indication
* max_len: Maximum receive frame length in bytes
* tx_cbfc_en: Enable transmission of class-based
* flow control packets
* rx_ifg_th: Threshold for IFG status reporting via OOB
* cf_timeout: Configurable time to decrement FC counters
* cf_drop: Drop control frames
* redirect_cbfc_sel: Selects one of CBFC redirect profiles
* rx_cbfc_redir_en: Enable Rx class-based flow
* control redirect
* rx_cbfc_en: Enable Rx class-based flow control
* tm_hd_mode: TM header mode
*/
struct {
u32
ext_oob_cbfc_sel:2,
max_len:14,
tx_cbfc_en:1,
rx_ifg_th:5,
cf_timeout:4,
cf_drop:1,
redirect_cbfc_sel:2,
rx_cbfc_redir_en:1,
rx_cbfc_en:1,
tm_hd_mode:1;
};
u32 value;
};
};
/* GE MAC, PCS reset control register */
struct nps_enet_ge_rst {
union {
/* gmac_0: GE MAC reset
* spcs_0: SGMII PCS reset
*/
struct {
u32
__reserved_1:23,
gmac_0:1,
__reserved_2:7,
spcs_0:1;
};
u32 value;
};
};
/* Tx phase sync FIFO control register */
struct nps_enet_phase_fifo_ctl {
union {
/* init: initialize serdes TX phase sync FIFO pointers
* rst: reset serdes TX phase sync FIFO
*/
struct {
u32
__reserved:30,
init:1,
rst:1;
};
u32 value;
};
};
/**
* struct nps_enet_priv - Storage of ENET's private information.
* @regs_base: Base address of ENET memory-mapped control registers.
* @irq: For RX/TX IRQ number.
* @tx_packet_sent: SW indication if frame is being sent.
* @tx_skb: socket buffer of sent frame.
* @napi: Structure for NAPI.
*/
struct nps_enet_priv {
void __iomem *regs_base;
s32 irq;
bool tx_packet_sent;
struct sk_buff *tx_skb;
struct napi_struct napi;
struct nps_enet_ge_mac_cfg_2 ge_mac_cfg_2;
struct nps_enet_ge_mac_cfg_3 ge_mac_cfg_3;
};
/**
* nps_reg_set - Sets ENET register with provided value.
* @priv: Pointer to EZchip ENET private data structure.
* @reg: Register offset from base address.
* @value: Value to set in register.
*/
static inline void nps_enet_reg_set(struct nps_enet_priv *priv,
s32 reg, s32 value)
{
iowrite32be(value, priv->regs_base + reg);
}
/**
* nps_reg_get - Gets value of specified ENET register.
* @priv: Pointer to EZchip ENET private data structure.
* @reg: Register offset from base address.
*
* returns: Value of requested register.
*/
static inline u32 nps_enet_reg_get(struct nps_enet_priv *priv, s32 reg)
{
return ioread32be(priv->regs_base + reg);
}
#endif /* _NPS_ENET_H */
