linux_kernel/drivers/net/ethernet/renesas/ravb.h

/* Renesas Ethernet AVB device driver
 *
 * Copyright (C) 2014-2015 Renesas Electronics Corporation
 * Copyright (C) 2015 Renesas Solutions Corp.
 * Copyright (C) 2015-2016 Cogent Embedded, Inc. <source@cogentembedded.com>
 *
 * Based on the SuperH Ethernet driver
 *
 * 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.
 */

#ifndef __RAVB_H__
#define __RAVB_H__

#include <linux/interrupt.h>
#include <linux/io.h>
#include <linux/kernel.h>
#include <linux/mdio-bitbang.h>
#include <linux/netdevice.h>
#include <linux/phy.h>
#include <linux/platform_device.h>
#include <linux/ptp_clock_kernel.h>

#define BE_TX_RING_SIZE	64	/* TX ring size for Best Effort */
#define BE_RX_RING_SIZE	1024	/* RX ring size for Best Effort */
#define NC_TX_RING_SIZE	64	/* TX ring size for Network Control */
#define NC_RX_RING_SIZE	64	/* RX ring size for Network Control */
#define BE_TX_RING_MIN	64
#define BE_RX_RING_MIN	64
#define BE_TX_RING_MAX	1024
#define BE_RX_RING_MAX	2048

#define PKT_BUF_SZ	1538

/* Driver's parameters */
#define RAVB_ALIGN	128

/* Hardware time stamp */
#define RAVB_TXTSTAMP_VALID	0x00000001	/* TX timestamp valid */
#define RAVB_TXTSTAMP_ENABLED	0x00000010	/* Enable TX timestamping */

#define RAVB_RXTSTAMP_VALID	0x00000001	/* RX timestamp valid */
#define RAVB_RXTSTAMP_TYPE	0x00000006	/* RX type mask */
#define RAVB_RXTSTAMP_TYPE_V2_L2_EVENT 0x00000002
#define RAVB_RXTSTAMP_TYPE_ALL	0x00000006
#define RAVB_RXTSTAMP_ENABLED	0x00000010	/* Enable RX timestamping */

enum ravb_reg {
	/* AVB-DMAC registers */
	CCC	= 0x0000,
	DBAT	= 0x0004,
	DLR	= 0x0008,
	CSR	= 0x000C,
	CDAR0	= 0x0010,
	CDAR1	= 0x0014,
	CDAR2	= 0x0018,
	CDAR3	= 0x001C,
	CDAR4	= 0x0020,
	CDAR5	= 0x0024,
	CDAR6	= 0x0028,
	CDAR7	= 0x002C,
	CDAR8	= 0x0030,
	CDAR9	= 0x0034,
	CDAR10	= 0x0038,
	CDAR11	= 0x003C,
	CDAR12	= 0x0040,
	CDAR13	= 0x0044,
	CDAR14	= 0x0048,
	CDAR15	= 0x004C,
	CDAR16	= 0x0050,
	CDAR17	= 0x0054,
	CDAR18	= 0x0058,
	CDAR19	= 0x005C,
	CDAR20	= 0x0060,
	CDAR21	= 0x0064,
	ESR	= 0x0088,
	RCR	= 0x0090,
	RQC0	= 0x0094,
	RQC1	= 0x0098,
	RQC2	= 0x009C,
	RQC3	= 0x00A0,
	RQC4	= 0x00A4,
	RPC	= 0x00B0,
	UFCW	= 0x00BC,
	UFCS	= 0x00C0,
	UFCV0	= 0x00C4,
	UFCV1	= 0x00C8,
	UFCV2	= 0x00CC,
	UFCV3	= 0x00D0,
	UFCV4	= 0x00D4,
	UFCD0	= 0x00E0,
	UFCD1	= 0x00E4,
	UFCD2	= 0x00E8,
	UFCD3	= 0x00EC,
	UFCD4	= 0x00F0,
	SFO	= 0x00FC,
	SFP0	= 0x0100,
	SFP1	= 0x0104,
	SFP2	= 0x0108,
	SFP3	= 0x010C,
	SFP4	= 0x0110,
	SFP5	= 0x0114,
	SFP6	= 0x0118,
	SFP7	= 0x011C,
	SFP8	= 0x0120,
	SFP9	= 0x0124,
	SFP10	= 0x0128,
	SFP11	= 0x012C,
	SFP12	= 0x0130,
	SFP13	= 0x0134,
	SFP14	= 0x0138,
	SFP15	= 0x013C,
	SFP16	= 0x0140,
	SFP17	= 0x0144,
	SFP18	= 0x0148,
	SFP19	= 0x014C,
	SFP20	= 0x0150,
	SFP21	= 0x0154,
	SFP22	= 0x0158,
	SFP23	= 0x015C,
	SFP24	= 0x0160,
	SFP25	= 0x0164,
	SFP26	= 0x0168,
	SFP27	= 0x016C,
	SFP28	= 0x0170,
	SFP29	= 0x0174,
	SFP30	= 0x0178,
	SFP31	= 0x017C,
	SFM0	= 0x01C0,
	SFM1	= 0x01C4,
	TGC	= 0x0300,
	TCCR	= 0x0304,
	TSR	= 0x0308,
	TFA0	= 0x0310,
	TFA1	= 0x0314,
	TFA2	= 0x0318,
	CIVR0	= 0x0320,
	CIVR1	= 0x0324,
	CDVR0	= 0x0328,
	CDVR1	= 0x032C,
	CUL0	= 0x0330,
	CUL1	= 0x0334,
	CLL0	= 0x0338,
	CLL1	= 0x033C,
	DIC	= 0x0350,
	DIS	= 0x0354,
	EIC	= 0x0358,
	EIS	= 0x035C,
	RIC0	= 0x0360,
	RIS0	= 0x0364,
	RIC1	= 0x0368,
	RIS1	= 0x036C,
	RIC2	= 0x0370,
	RIS2	= 0x0374,
	TIC	= 0x0378,
	TIS	= 0x037C,
	ISS	= 0x0380,
	GCCR	= 0x0390,
	GMTT	= 0x0394,
	GPTC	= 0x0398,
	GTI	= 0x039C,
	GTO0	= 0x03A0,
	GTO1	= 0x03A4,
	GTO2	= 0x03A8,
	GIC	= 0x03AC,
	GIS	= 0x03B0,
	GCPT	= 0x03B4,	/* Undocumented? */
	GCT0	= 0x03B8,
	GCT1	= 0x03BC,
	GCT2	= 0x03C0,

	/* E-MAC registers */
	ECMR	= 0x0500,
	RFLR	= 0x0508,
	ECSR	= 0x0510,
	ECSIPR	= 0x0518,
	PIR	= 0x0520,
	PSR	= 0x0528,
	PIPR	= 0x052c,
	MPR	= 0x0558,
	PFTCR	= 0x055c,
	PFRCR	= 0x0560,
	GECMR	= 0x05b0,
	MAHR	= 0x05c0,
	MALR	= 0x05c8,
	TROCR	= 0x0700,	/* Undocumented? */
	CDCR	= 0x0708,	/* Undocumented? */
	LCCR	= 0x0710,	/* Undocumented? */
	CEFCR	= 0x0740,
	FRECR	= 0x0748,
	TSFRCR	= 0x0750,
	TLFRCR	= 0x0758,
	RFCR	= 0x0760,
	CERCR	= 0x0768,	/* Undocumented? */
	CEECR	= 0x0770,	/* Undocumented? */
	MAFCR	= 0x0778,
};


/* Register bits of the Ethernet AVB */
/* CCC */
enum CCC_BIT {
	CCC_OPC		= 0x00000003,
	CCC_OPC_RESET	= 0x00000000,
	CCC_OPC_CONFIG	= 0x00000001,
	CCC_OPC_OPERATION = 0x00000002,
	CCC_GAC		= 0x00000080,
	CCC_DTSR	= 0x00000100,
	CCC_CSEL	= 0x00030000,
	CCC_CSEL_HPB	= 0x00010000,
	CCC_CSEL_ETH_TX	= 0x00020000,
	CCC_CSEL_GMII_REF = 0x00030000,
	CCC_BOC		= 0x00100000,	/* Undocumented? */
	CCC_LBME	= 0x01000000,
};

/* CSR */
enum CSR_BIT {
	CSR_OPS		= 0x0000000F,
	CSR_OPS_RESET	= 0x00000001,
	CSR_OPS_CONFIG	= 0x00000002,
	CSR_OPS_OPERATION = 0x00000004,
	CSR_OPS_STANDBY	= 0x00000008,	/* Undocumented? */
	CSR_DTS		= 0x00000100,
	CSR_TPO0	= 0x00010000,
	CSR_TPO1	= 0x00020000,
	CSR_TPO2	= 0x00040000,
	CSR_TPO3	= 0x00080000,
	CSR_RPO		= 0x00100000,
};

/* ESR */
enum ESR_BIT {
	ESR_EQN		= 0x0000001F,
	ESR_ET		= 0x00000F00,
	ESR_EIL		= 0x00001000,
};

/* RCR */
enum RCR_BIT {
	RCR_EFFS	= 0x00000001,
	RCR_ENCF	= 0x00000002,
	RCR_ESF		= 0x0000000C,
	RCR_ETS0	= 0x00000010,
	RCR_ETS2	= 0x00000020,
	RCR_RFCL	= 0x1FFF0000,
};

/* RQC0/1/2/3/4 */
enum RQC_BIT {
	RQC_RSM0	= 0x00000003,
	RQC_UFCC0	= 0x00000030,
	RQC_RSM1	= 0x00000300,
	RQC_UFCC1	= 0x00003000,
	RQC_RSM2	= 0x00030000,
	RQC_UFCC2	= 0x00300000,
	RQC_RSM3	= 0x03000000,
	RQC_UFCC3	= 0x30000000,
};

/* RPC */
enum RPC_BIT {
	RPC_PCNT	= 0x00000700,
	RPC_DCNT	= 0x00FF0000,
};

/* UFCW */
enum UFCW_BIT {
	UFCW_WL0	= 0x0000003F,
	UFCW_WL1	= 0x00003F00,
	UFCW_WL2	= 0x003F0000,
	UFCW_WL3	= 0x3F000000,
};

/* UFCS */
enum UFCS_BIT {
	UFCS_SL0	= 0x0000003F,
	UFCS_SL1	= 0x00003F00,
	UFCS_SL2	= 0x003F0000,
	UFCS_SL3	= 0x3F000000,
};

/* UFCV0/1/2/3/4 */
enum UFCV_BIT {
	UFCV_CV0	= 0x0000003F,
	UFCV_CV1	= 0x00003F00,
	UFCV_CV2	= 0x003F0000,
	UFCV_CV3	= 0x3F000000,
};

/* UFCD0/1/2/3/4 */
enum UFCD_BIT {
	UFCD_DV0	= 0x0000003F,
	UFCD_DV1	= 0x00003F00,
	UFCD_DV2	= 0x003F0000,
	UFCD_DV3	= 0x3F000000,
};

/* SFO */
enum SFO_BIT {
	SFO_FPB		= 0x0000003F,
};

/* RTC */
enum RTC_BIT {
	RTC_MFL0	= 0x00000FFF,
	RTC_MFL1	= 0x0FFF0000,
};

/* TGC */
enum TGC_BIT {
	TGC_TSM0	= 0x00000001,
	TGC_TSM1	= 0x00000002,
	TGC_TSM2	= 0x00000004,
	TGC_TSM3	= 0x00000008,
	TGC_TQP		= 0x00000030,
	TGC_TQP_NONAVB	= 0x00000000,
	TGC_TQP_AVBMODE1 = 0x00000010,
	TGC_TQP_AVBMODE2 = 0x00000030,
	TGC_TBD0	= 0x00000300,
	TGC_TBD1	= 0x00003000,
	TGC_TBD2	= 0x00030000,
	TGC_TBD3	= 0x00300000,
};

/* TCCR */
enum TCCR_BIT {
	TCCR_TSRQ0	= 0x00000001,
	TCCR_TSRQ1	= 0x00000002,
	TCCR_TSRQ2	= 0x00000004,
	TCCR_TSRQ3	= 0x00000008,
	TCCR_TFEN	= 0x00000100,
	TCCR_TFR	= 0x00000200,
};

/* TSR */
enum TSR_BIT {
	TSR_CCS0	= 0x00000003,
	TSR_CCS1	= 0x0000000C,
	TSR_TFFL	= 0x00000700,
};

/* TFA2 */
enum TFA2_BIT {
	TFA2_TSV	= 0x0000FFFF,
	TFA2_TST	= 0x03FF0000,
};

/* DIC */
enum DIC_BIT {
	DIC_DPE1	= 0x00000002,
	DIC_DPE2	= 0x00000004,
	DIC_DPE3	= 0x00000008,
	DIC_DPE4	= 0x00000010,
	DIC_DPE5	= 0x00000020,
	DIC_DPE6	= 0x00000040,
	DIC_DPE7	= 0x00000080,
	DIC_DPE8	= 0x00000100,
	DIC_DPE9	= 0x00000200,
	DIC_DPE10	= 0x00000400,
	DIC_DPE11	= 0x00000800,
	DIC_DPE12	= 0x00001000,
	DIC_DPE13	= 0x00002000,
	DIC_DPE14	= 0x00004000,
	DIC_DPE15	= 0x00008000,
};

/* DIS */
enum DIS_BIT {
	DIS_DPF1	= 0x00000002,
	DIS_DPF2	= 0x00000004,
	DIS_DPF3	= 0x00000008,
	DIS_DPF4	= 0x00000010,
	DIS_DPF5	= 0x00000020,
	DIS_DPF6	= 0x00000040,
	DIS_DPF7	= 0x00000080,
	DIS_DPF8	= 0x00000100,
	DIS_DPF9	= 0x00000200,
	DIS_DPF10	= 0x00000400,
	DIS_DPF11	= 0x00000800,
	DIS_DPF12	= 0x00001000,
	DIS_DPF13	= 0x00002000,
	DIS_DPF14	= 0x00004000,
	DIS_DPF15	= 0x00008000,
};

/* EIC */
enum EIC_BIT {
	EIC_MREE	= 0x00000001,
	EIC_MTEE	= 0x00000002,
	EIC_QEE		= 0x00000004,
	EIC_SEE		= 0x00000008,
	EIC_CLLE0	= 0x00000010,
	EIC_CLLE1	= 0x00000020,
	EIC_CULE0	= 0x00000040,
	EIC_CULE1	= 0x00000080,
	EIC_TFFE	= 0x00000100,
};

/* EIS */
enum EIS_BIT {
	EIS_MREF	= 0x00000001,
	EIS_MTEF	= 0x00000002,
	EIS_QEF		= 0x00000004,
	EIS_SEF		= 0x00000008,
	EIS_CLLF0	= 0x00000010,
	EIS_CLLF1	= 0x00000020,
	EIS_CULF0	= 0x00000040,
	EIS_CULF1	= 0x00000080,
	EIS_TFFF	= 0x00000100,
	EIS_QFS		= 0x00010000,
};

/* RIC0 */
enum RIC0_BIT {
	RIC0_FRE0	= 0x00000001,
	RIC0_FRE1	= 0x00000002,
	RIC0_FRE2	= 0x00000004,
	RIC0_FRE3	= 0x00000008,
	RIC0_FRE4	= 0x00000010,
	RIC0_FRE5	= 0x00000020,
	RIC0_FRE6	= 0x00000040,
	RIC0_FRE7	= 0x00000080,
	RIC0_FRE8	= 0x00000100,
	RIC0_FRE9	= 0x00000200,
	RIC0_FRE10	= 0x00000400,
	RIC0_FRE11	= 0x00000800,
	RIC0_FRE12	= 0x00001000,
	RIC0_FRE13	= 0x00002000,
	RIC0_FRE14	= 0x00004000,
	RIC0_FRE15	= 0x00008000,
	RIC0_FRE16	= 0x00010000,
	RIC0_FRE17	= 0x00020000,
};

/* RIC0 */
enum RIS0_BIT {
	RIS0_FRF0	= 0x00000001,
	RIS0_FRF1	= 0x00000002,
	RIS0_FRF2	= 0x00000004,
	RIS0_FRF3	= 0x00000008,
	RIS0_FRF4	= 0x00000010,
	RIS0_FRF5	= 0x00000020,
	RIS0_FRF6	= 0x00000040,
	RIS0_FRF7	= 0x00000080,
	RIS0_FRF8	= 0x00000100,
	RIS0_FRF9	= 0x00000200,
	RIS0_FRF10	= 0x00000400,
	RIS0_FRF11	= 0x00000800,
	RIS0_FRF12	= 0x00001000,
	RIS0_FRF13	= 0x00002000,
	RIS0_FRF14	= 0x00004000,
	RIS0_FRF15	= 0x00008000,
	RIS0_FRF16	= 0x00010000,
	RIS0_FRF17	= 0x00020000,
};

/* RIC1 */
enum RIC1_BIT {
	RIC1_RFWE	= 0x80000000,
};

/* RIS1 */
enum RIS1_BIT {
	RIS1_RFWF	= 0x80000000,
};

/* RIC2 */
enum RIC2_BIT {
	RIC2_QFE0	= 0x00000001,
	RIC2_QFE1	= 0x00000002,
	RIC2_QFE2	= 0x00000004,
	RIC2_QFE3	= 0x00000008,
	RIC2_QFE4	= 0x00000010,
	RIC2_QFE5	= 0x00000020,
	RIC2_QFE6	= 0x00000040,
	RIC2_QFE7	= 0x00000080,
	RIC2_QFE8	= 0x00000100,
	RIC2_QFE9	= 0x00000200,
	RIC2_QFE10	= 0x00000400,
	RIC2_QFE11	= 0x00000800,
	RIC2_QFE12	= 0x00001000,
	RIC2_QFE13	= 0x00002000,
	RIC2_QFE14	= 0x00004000,
	RIC2_QFE15	= 0x00008000,
	RIC2_QFE16	= 0x00010000,
	RIC2_QFE17	= 0x00020000,
	RIC2_RFFE	= 0x80000000,
};

/* RIS2 */
enum RIS2_BIT {
	RIS2_QFF0	= 0x00000001,
	RIS2_QFF1	= 0x00000002,
	RIS2_QFF2	= 0x00000004,
	RIS2_QFF3	= 0x00000008,
	RIS2_QFF4	= 0x00000010,
	RIS2_QFF5	= 0x00000020,
	RIS2_QFF6	= 0x00000040,
	RIS2_QFF7	= 0x00000080,
	RIS2_QFF8	= 0x00000100,
	RIS2_QFF9	= 0x00000200,
	RIS2_QFF10	= 0x00000400,
	RIS2_QFF11	= 0x00000800,
	RIS2_QFF12	= 0x00001000,
	RIS2_QFF13	= 0x00002000,
	RIS2_QFF14	= 0x00004000,
	RIS2_QFF15	= 0x00008000,
	RIS2_QFF16	= 0x00010000,
	RIS2_QFF17	= 0x00020000,
	RIS2_RFFF	= 0x80000000,
};

/* TIC */
enum TIC_BIT {
	TIC_FTE0	= 0x00000001,	/* Undocumented? */
	TIC_FTE1	= 0x00000002,	/* Undocumented? */
	TIC_TFUE	= 0x00000100,
	TIC_TFWE	= 0x00000200,
};

/* TIS */
enum TIS_BIT {
	TIS_FTF0	= 0x00000001,	/* Undocumented? */
	TIS_FTF1	= 0x00000002,	/* Undocumented? */
	TIS_TFUF	= 0x00000100,
	TIS_TFWF	= 0x00000200,
};

/* ISS */
enum ISS_BIT {
	ISS_FRS		= 0x00000001,	/* Undocumented? */
	ISS_FTS		= 0x00000004,	/* Undocumented? */
	ISS_ES		= 0x00000040,
	ISS_MS		= 0x00000080,
	ISS_TFUS	= 0x00000100,
	ISS_TFWS	= 0x00000200,
	ISS_RFWS	= 0x00001000,
	ISS_CGIS	= 0x00002000,
	ISS_DPS1	= 0x00020000,
	ISS_DPS2	= 0x00040000,
	ISS_DPS3	= 0x00080000,
	ISS_DPS4	= 0x00100000,
	ISS_DPS5	= 0x00200000,
	ISS_DPS6	= 0x00400000,
	ISS_DPS7	= 0x00800000,
	ISS_DPS8	= 0x01000000,
	ISS_DPS9	= 0x02000000,
	ISS_DPS10	= 0x04000000,
	ISS_DPS11	= 0x08000000,
	ISS_DPS12	= 0x10000000,
	ISS_DPS13	= 0x20000000,
	ISS_DPS14	= 0x40000000,
	ISS_DPS15	= 0x80000000,
};

/* GCCR */
enum GCCR_BIT {
	GCCR_TCR	= 0x00000003,
	GCCR_TCR_NOREQ	= 0x00000000, /* No request */
	GCCR_TCR_RESET	= 0x00000001, /* gPTP/AVTP presentation timer reset */
	GCCR_TCR_CAPTURE = 0x00000003, /* Capture value set in GCCR.TCSS */
	GCCR_LTO	= 0x00000004,
	GCCR_LTI	= 0x00000008,
	GCCR_LPTC	= 0x00000010,
	GCCR_LMTT	= 0x00000020,
	GCCR_TCSS	= 0x00000300,
	GCCR_TCSS_GPTP	= 0x00000000,	/* gPTP timer value */
	GCCR_TCSS_ADJGPTP = 0x00000100, /* Adjusted gPTP timer value */
	GCCR_TCSS_AVTP	= 0x00000200,	/* AVTP presentation time value */
};

/* GTI */
enum GTI_BIT {
	GTI_TIV		= 0x0FFFFFFF,
};

#define GTI_TIV_MAX	GTI_TIV
#define GTI_TIV_MIN	0x20

/* GIC */
enum GIC_BIT {
	GIC_PTCE	= 0x00000001,	/* Undocumented? */
	GIC_PTME	= 0x00000004,
};

/* GIS */
enum GIS_BIT {
	GIS_PTCF	= 0x00000001,	/* Undocumented? */
	GIS_PTMF	= 0x00000004,
};

/* ECMR */
enum ECMR_BIT {
	ECMR_PRM	= 0x00000001,
	ECMR_DM		= 0x00000002,
	ECMR_TE		= 0x00000020,
	ECMR_RE		= 0x00000040,
	ECMR_MPDE	= 0x00000200,
	ECMR_TXF	= 0x00010000,	/* Undocumented? */
	ECMR_RXF	= 0x00020000,
	ECMR_PFR	= 0x00040000,
	ECMR_ZPF	= 0x00080000,	/* Undocumented? */
	ECMR_RZPF	= 0x00100000,
	ECMR_DPAD	= 0x00200000,
	ECMR_RCSC	= 0x00800000,
	ECMR_TRCCM	= 0x04000000,
};

/* ECSR */
enum ECSR_BIT {
	ECSR_ICD	= 0x00000001,
	ECSR_MPD	= 0x00000002,
	ECSR_LCHNG	= 0x00000004,
	ECSR_PHYI	= 0x00000008,
};

/* ECSIPR */
enum ECSIPR_BIT {
	ECSIPR_ICDIP	= 0x00000001,
	ECSIPR_MPDIP	= 0x00000002,
	ECSIPR_LCHNGIP	= 0x00000004,	/* Undocumented? */
};

/* PIR */
enum PIR_BIT {
	PIR_MDC		= 0x00000001,
	PIR_MMD		= 0x00000002,
	PIR_MDO		= 0x00000004,
	PIR_MDI		= 0x00000008,
};

/* PSR */
enum PSR_BIT {
	PSR_LMON	= 0x00000001,
};

/* PIPR */
enum PIPR_BIT {
	PIPR_PHYIP	= 0x00000001,
};

/* MPR */
enum MPR_BIT {
	MPR_MP		= 0x0000ffff,
};

/* GECMR */
enum GECMR_BIT {
	GECMR_SPEED	= 0x00000001,
	GECMR_SPEED_100	= 0x00000000,
	GECMR_SPEED_1000 = 0x00000001,
};

/* The Ethernet AVB descriptor definitions. */
struct ravb_desc {
	__le16 ds;		/* Descriptor size */
	u8 cc;		/* Content control MSBs (reserved) */
	u8 die_dt;	/* Descriptor interrupt enable and type */
	__le32 dptr;	/* Descriptor pointer */
};

#define DPTR_ALIGN	4	/* Required descriptor pointer alignment */

enum DIE_DT {
	/* Frame data */
	DT_FMID		= 0x40,
	DT_FSTART	= 0x50,
	DT_FEND		= 0x60,
	DT_FSINGLE	= 0x70,
	/* Chain control */
	DT_LINK		= 0x80,
	DT_LINKFIX	= 0x90,
	DT_EOS		= 0xa0,
	/* HW/SW arbitration */
	DT_FEMPTY	= 0xc0,
	DT_FEMPTY_IS	= 0xd0,
	DT_FEMPTY_IC	= 0xe0,
	DT_FEMPTY_ND	= 0xf0,
	DT_LEMPTY	= 0x20,
	DT_EEMPTY	= 0x30,
};

struct ravb_rx_desc {
	__le16 ds_cc;	/* Descriptor size and content control LSBs */
	u8 msc;		/* MAC status code */
	u8 die_dt;	/* Descriptor interrupt enable and type */
	__le32 dptr;	/* Descpriptor pointer */
};

struct ravb_ex_rx_desc {
	__le16 ds_cc;	/* Descriptor size and content control lower bits */
	u8 msc;		/* MAC status code */
	u8 die_dt;	/* Descriptor interrupt enable and type */
	__le32 dptr;	/* Descpriptor pointer */
	__le32 ts_n;	/* Timestampe nsec */
	__le32 ts_sl;	/* Timestamp low */
	__le16 ts_sh;	/* Timestamp high */
	__le16 res;	/* Reserved bits */
};

enum RX_DS_CC_BIT {
	RX_DS		= 0x0fff, /* Data size */
	RX_TR		= 0x1000, /* Truncation indication */
	RX_EI		= 0x2000, /* Error indication */
	RX_PS		= 0xc000, /* Padding selection */
};

/* E-MAC status code */
enum MSC_BIT {
	MSC_CRC		= 0x01, /* Frame CRC error */
	MSC_RFE		= 0x02, /* Frame reception error (flagged by PHY) */
	MSC_RTSF	= 0x04, /* Frame length error (frame too short) */
	MSC_RTLF	= 0x08, /* Frame length error (frame too long) */
	MSC_FRE		= 0x10, /* Fraction error (not a multiple of 8 bits) */
	MSC_CRL		= 0x20, /* Carrier lost */
	MSC_CEEF	= 0x40, /* Carrier extension error */
	MSC_MC		= 0x80, /* Multicast frame reception */
};

struct ravb_tx_desc {
	__le16 ds_tagl;	/* Descriptor size and frame tag LSBs */
	u8 tagh_tsr;	/* Frame tag MSBs and timestamp storage request bit */
	u8 die_dt;	/* Descriptor interrupt enable and type */
	__le32 dptr;	/* Descpriptor pointer */
};

enum TX_DS_TAGL_BIT {
	TX_DS		= 0x0fff, /* Data size */
	TX_TAGL		= 0xf000, /* Frame tag LSBs */
};

enum TX_TAGH_TSR_BIT {
	TX_TAGH		= 0x3f, /* Frame tag MSBs */
	TX_TSR		= 0x40, /* Timestamp storage request */
};
enum RAVB_QUEUE {
	RAVB_BE = 0,	/* Best Effort Queue */
	RAVB_NC,	/* Network Control Queue */
};

#define DBAT_ENTRY_NUM	22
#define RX_QUEUE_OFFSET	4
#define NUM_RX_QUEUE	2
#define NUM_TX_QUEUE	2
#define NUM_TX_DESC	2	/* TX descriptors per packet */

struct ravb_tstamp_skb {
	struct list_head list;
	struct sk_buff *skb;
	u16 tag;
};

struct ravb_ptp_perout {
	u32 target;
	u32 period;
};

#define N_EXT_TS	1
#define N_PER_OUT	1

struct ravb_ptp {
	struct ptp_clock *clock;
	struct ptp_clock_info info;
	u32 default_addend;
	u32 current_addend;
	int extts[N_EXT_TS];
	struct ravb_ptp_perout perout[N_PER_OUT];
};

enum ravb_chip_id {
	RCAR_GEN2,
	RCAR_GEN3,
};

struct ravb_private {
	struct net_device *ndev;
	struct platform_device *pdev;
	void __iomem *addr;
	struct mdiobb_ctrl mdiobb;
	u32 num_rx_ring[NUM_RX_QUEUE];
	u32 num_tx_ring[NUM_TX_QUEUE];
	u32 desc_bat_size;
	dma_addr_t desc_bat_dma;
	struct ravb_desc *desc_bat;
	dma_addr_t rx_desc_dma[NUM_RX_QUEUE];
	dma_addr_t tx_desc_dma[NUM_TX_QUEUE];
	struct ravb_ex_rx_desc *rx_ring[NUM_RX_QUEUE];
	struct ravb_tx_desc *tx_ring[NUM_TX_QUEUE];
	void *tx_align[NUM_TX_QUEUE];
	struct sk_buff **rx_skb[NUM_RX_QUEUE];
	struct sk_buff **tx_skb[NUM_TX_QUEUE];
	u32 rx_over_errors;
	u32 rx_fifo_errors;
	struct net_device_stats stats[NUM_RX_QUEUE];
	u32 tstamp_tx_ctrl;
	u32 tstamp_rx_ctrl;
	struct list_head ts_skb_list;
	u32 ts_skb_tag;
	struct ravb_ptp ptp;
	spinlock_t lock;		/* Register access lock */
	u32 cur_rx[NUM_RX_QUEUE];	/* Consumer ring indices */
	u32 dirty_rx[NUM_RX_QUEUE];	/* Producer ring indices */
	u32 cur_tx[NUM_TX_QUEUE];
	u32 dirty_tx[NUM_TX_QUEUE];
	struct napi_struct napi[NUM_RX_QUEUE];
	struct work_struct work;
	/* MII transceiver section. */
	struct mii_bus *mii_bus;	/* MDIO bus control */
	struct phy_device *phydev;	/* PHY device control */
	int link;
	phy_interface_t phy_interface;
	int msg_enable;
	int speed;
	int duplex;
	int emac_irq;
	enum ravb_chip_id chip_id;

	unsigned no_avb_link:1;
	unsigned avb_link_active_low:1;
};

static inline u32 ravb_read(struct net_device *ndev, enum ravb_reg reg)
{
	struct ravb_private *priv = netdev_priv(ndev);

	return ioread32(priv->addr + reg);
}

static inline void ravb_write(struct net_device *ndev, u32 data,
			      enum ravb_reg reg)
{
	struct ravb_private *priv = netdev_priv(ndev);

	iowrite32(data, priv->addr + reg);
}

void ravb_modify(struct net_device *ndev, enum ravb_reg reg, u32 clear,
		 u32 set);
int ravb_wait(struct net_device *ndev, enum ravb_reg reg, u32 mask, u32 value);

irqreturn_t ravb_ptp_interrupt(struct net_device *ndev);
void ravb_ptp_init(struct net_device *ndev, struct platform_device *pdev);
void ravb_ptp_stop(struct net_device *ndev);

#endif	/* #ifndef __RAVB_H__ */