/*
 *  SuperH Ethernet device driver
 *
 *  Copyright (C) 2006-2008 Nobuhiro Iwamatsu
 *  Copyright (C) 2008 Renesas Solutions Corp.
 *
 *  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.
 *  You should have received a copy of the GNU General Public License along with
 *  this program; if not, write to the Free Software Foundation, Inc.,
 *  51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
 *
 *  The full GNU General Public License is included in this distribution in
 *  the file called "COPYING".
 */

#ifndef __SH_ETH_H__
#define __SH_ETH_H__

#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/spinlock.h>
#include <linux/workqueue.h>
#include <linux/netdevice.h>
#include <linux/phy.h>

#define CARDNAME	"sh-eth"
#define TX_TIMEOUT	(5*HZ)

#define TX_RING_SIZE	128	/* Tx ring size */
#define RX_RING_SIZE	128	/* Rx ring size */
#define RX_OFFSET		2	/* skb offset */
#define ETHERSMALL		60
#define PKT_BUF_SZ		1538

/* Chip Base Address */
#define SH_ETH0_BASE 0xA7000000
#define SH_ETH1_BASE 0xA7000400
#define SH_TSU_ADDR 0xA7000804

/* Chip Registers */
/* E-DMAC */
#define EDMR	0x0000
#define EDTRR	0x0004
#define EDRRR	0x0008
#define TDLAR	0x000C
#define RDLAR	0x0010
#define EESR	0x0014
#define EESIPR	0x0018
#define TRSCER	0x001C
#define RMFCR	0x0020
#define TFTR	0x0024
#define FDR		0x0028
#define RMCR	0x002C
#define EDOCR	0x0030
#define FCFTR	0x0034
#define RPADIR	0x0038
#define TRIMD	0x003C
#define RBWAR	0x0040
#define RDFAR	0x0044
#define TBRAR	0x004C
#define TDFAR	0x0050
/* Ether Register */
#define ECMR	0x0160
#define ECSR	0x0164
#define ECSIPR	0x0168
#define PIR		0x016C
#define MAHR	0x0170
#define MALR	0x0174
#define RFLR	0x0178
#define PSR		0x017C
#define TROCR	0x0180
#define CDCR	0x0184
#define LCCR	0x0188
#define CNDCR	0x018C
#define CEFCR	0x0194
#define FRECR	0x0198
#define TSFRCR	0x019C
#define TLFRCR	0x01A0
#define RFCR	0x01A4
#define MAFCR	0x01A8
#define IPGR	0x01B4
#if defined(CONFIG_CPU_SUBTYPE_SH7710)
#define APR		0x01B8
#define MPR 	0x01BC
#define TPAUSER 0x1C4
#define BCFR	0x1CC
#endif /* CONFIG_CPU_SH7710 */

#define ARSTR	0x0800

/* TSU */
#define TSU_CTRST	0x004
#define TSU_FWEN0	0x010
#define TSU_FWEN1	0x014
#define TSU_FCM		0x018
#define TSU_BSYSL0	0x020
#define TSU_BSYSL1	0x024
#define TSU_PRISL0	0x028
#define TSU_PRISL1	0x02C
#define TSU_FWSL0	0x030
#define TSU_FWSL1	0x034
#define TSU_FWSLC	0x038
#define TSU_QTAGM0	0x040
#define TSU_QTAGM1	0x044
#define TSU_ADQT0 	0x048
#define TSU_ADQT1	0x04C
#define TSU_FWSR	0x050
#define TSU_FWINMK	0x054
#define TSU_ADSBSY	0x060
#define TSU_TEN		0x064
#define TSU_POST1	0x070
#define TSU_POST2	0x074
#define TSU_POST3	0x078
#define TSU_POST4	0x07C
#define TXNLCR0		0x080
#define TXALCR0		0x084
#define RXNLCR0		0x088
#define RXALCR0		0x08C
#define FWNLCR0		0x090
#define FWALCR0		0x094
#define TXNLCR1		0x0A0
#define TXALCR1		0x0A4
#define RXNLCR1		0x0A8
#define RXALCR1		0x0AC
#define FWNLCR1		0x0B0
#define FWALCR1		0x0B4

#define TSU_ADRH0	0x0100
#define TSU_ADRL0	0x0104
#define TSU_ADRL31	0x01FC

/* Register's bits */

/* EDMR */
enum DMAC_M_BIT {
	EDMR_DL1 = 0x20, EDMR_DL0 = 0x10, EDMR_SRST = 0x01,
};

/* EDTRR */
enum DMAC_T_BIT {
	EDTRR_TRNS = 0x01,
};

/* EDRRR*/
enum EDRRR_R_BIT {
	EDRRR_R = 0x01,
};

/* TPAUSER */
enum TPAUSER_BIT {
	TPAUSER_TPAUSE = 0x0000ffff,
	TPAUSER_UNLIMITED = 0,
};

/* BCFR */
enum BCFR_BIT {
	BCFR_RPAUSE = 0x0000ffff,
	BCFR_UNLIMITED = 0,
};

/* PIR */
enum PIR_BIT {
	PIR_MDI = 0x08, PIR_MDO = 0x04, PIR_MMD = 0x02, PIR_MDC = 0x01,
};

/* PSR */
enum PHY_STATUS_BIT { PHY_ST_LINK = 0x01, };

/* EESR */
enum EESR_BIT {
	EESR_TWB = 0x40000000, EESR_TABT = 0x04000000,
	EESR_RABT = 0x02000000, EESR_RFRMER = 0x01000000,
	EESR_ADE = 0x00800000, EESR_ECI = 0x00400000,
	EESR_FTC = 0x00200000, EESR_TDE = 0x00100000,
	EESR_TFE = 0x00080000, EESR_FRC = 0x00040000,
	EESR_RDE = 0x00020000, EESR_RFE = 0x00010000,
	EESR_TINT4 = 0x00000800, EESR_TINT3 = 0x00000400,
	EESR_TINT2 = 0x00000200, EESR_TINT1 = 0x00000100,
	EESR_RINT8 = 0x00000080, EESR_RINT5 = 0x00000010,
	EESR_RINT4 = 0x00000008, EESR_RINT3 = 0x00000004,
	EESR_RINT2 = 0x00000002, EESR_RINT1 = 0x00000001,
};

#define EESR_ERR_CHECK	(EESR_TWB | EESR_TABT | EESR_RABT | EESR_RDE \
		| EESR_RFRMER | EESR_ADE | EESR_TFE | EESR_TDE | EESR_ECI)

/* EESIPR */
enum DMAC_IM_BIT {
	DMAC_M_TWB = 0x40000000, DMAC_M_TABT = 0x04000000,
	DMAC_M_RABT = 0x02000000,
	DMAC_M_RFRMER = 0x01000000, DMAC_M_ADF = 0x00800000,
	DMAC_M_ECI = 0x00400000, DMAC_M_FTC = 0x00200000,
	DMAC_M_TDE = 0x00100000, DMAC_M_TFE = 0x00080000,
	DMAC_M_FRC = 0x00040000, DMAC_M_RDE = 0x00020000,
	DMAC_M_RFE = 0x00010000, DMAC_M_TINT4 = 0x00000800,
	DMAC_M_TINT3 = 0x00000400, DMAC_M_TINT2 = 0x00000200,
	DMAC_M_TINT1 = 0x00000100, DMAC_M_RINT8 = 0x00000080,
	DMAC_M_RINT5 = 0x00000010, DMAC_M_RINT4 = 0x00000008,
	DMAC_M_RINT3 = 0x00000004, DMAC_M_RINT2 = 0x00000002,
	DMAC_M_RINT1 = 0x00000001,
};

/* Receive descriptor bit */
enum RD_STS_BIT {
	RD_RACT = 0x80000000, RC_RDEL = 0x40000000,
	RC_RFP1 = 0x20000000, RC_RFP0 = 0x10000000,
	RD_RFE = 0x08000000, RD_RFS10 = 0x00000200,
	RD_RFS9 = 0x00000100, RD_RFS8 = 0x00000080,
	RD_RFS7 = 0x00000040, RD_RFS6 = 0x00000020,
	RD_RFS5 = 0x00000010, RD_RFS4 = 0x00000008,
	RD_RFS3 = 0x00000004, RD_RFS2 = 0x00000002,
	RD_RFS1 = 0x00000001,
};
#define RDF1ST	RC_RFP1
#define RDFEND	RC_RFP0
#define RD_RFP	(RC_RFP1|RC_RFP0)

/* FCFTR */
enum FCFTR_BIT {
	FCFTR_RFF2 = 0x00040000, FCFTR_RFF1 = 0x00020000,
	FCFTR_RFF0 = 0x00010000, FCFTR_RFD2 = 0x00000004,
	FCFTR_RFD1 = 0x00000002, FCFTR_RFD0 = 0x00000001,
};
#define FIFO_F_D_RFF	(FCFTR_RFF2|FCFTR_RFF1|FCFTR_RFF0)
#define FIFO_F_D_RFD	(FCFTR_RFD2|FCFTR_RFD1|FCFTR_RFD0)

/* Transfer descriptor bit */
enum TD_STS_BIT {
	TD_TACT = 0x80000000, TD_TDLE = 0x40000000, TD_TFP1 = 0x20000000,
	TD_TFP0 = 0x10000000,
};
#define TDF1ST	TD_TFP1
#define TDFEND	TD_TFP0
#define TD_TFP	(TD_TFP1|TD_TFP0)

/* RMCR */
enum RECV_RST_BIT { RMCR_RST = 0x01, };
/* ECMR */
enum FELIC_MODE_BIT {
	ECMR_ZPF = 0x00080000, ECMR_PFR = 0x00040000, ECMR_RXF = 0x00020000,
	ECMR_TXF = 0x00010000, ECMR_MCT = 0x00002000, ECMR_PRCEF = 0x00001000,
	ECMR_PMDE = 0x00000200, ECMR_RE = 0x00000040, ECMR_TE = 0x00000020,
	ECMR_ILB = 0x00000008, ECMR_ELB = 0x00000004, ECMR_DM = 0x00000002,
	ECMR_PRM = 0x00000001,
};

/* ECSR */
enum ECSR_STATUS_BIT {
	ECSR_BRCRX = 0x20, ECSR_PSRTO = 0x10, ECSR_LCHNG = 0x04,
	ECSR_MPD = 0x02, ECSR_ICD = 0x01,
};

/* ECSIPR */
enum ECSIPR_STATUS_MASK_BIT {
	ECSIPR_BRCRXIP = 0x20, ECSIPR_PSRTOIP = 0x10, ECSIPR_LCHNGIP = 0x04,
	ECSIPR_MPDIP = 0x02, ECSIPR_ICDIP = 0x01,
};

/* APR */
enum APR_BIT {
	APR_AP = 0x00000001,
};

/* MPR */
enum MPR_BIT {
	MPR_MP = 0x00000001,
};

/* TRSCER */
enum DESC_I_BIT {
	DESC_I_TINT4 = 0x0800, DESC_I_TINT3 = 0x0400, DESC_I_TINT2 = 0x0200,
	DESC_I_TINT1 = 0x0100, DESC_I_RINT8 = 0x0080, DESC_I_RINT5 = 0x0010,
	DESC_I_RINT4 = 0x0008, DESC_I_RINT3 = 0x0004, DESC_I_RINT2 = 0x0002,
	DESC_I_RINT1 = 0x0001,
};

/* RPADIR */
enum RPADIR_BIT {
	RPADIR_PADS1 = 0x20000, RPADIR_PADS0 = 0x10000,
	RPADIR_PADR = 0x0003f,
};

/* FDR */
enum FIFO_SIZE_BIT {
	FIFO_SIZE_T = 0x00000700, FIFO_SIZE_R = 0x00000007,
};
enum phy_offsets {
	PHY_CTRL = 0, PHY_STAT = 1, PHY_IDT1 = 2, PHY_IDT2 = 3,
	PHY_ANA = 4, PHY_ANL = 5, PHY_ANE = 6,
	PHY_16 = 16,
};

/* PHY_CTRL */
enum PHY_CTRL_BIT {
	PHY_C_RESET = 0x8000, PHY_C_LOOPBK = 0x4000, PHY_C_SPEEDSL = 0x2000,
	PHY_C_ANEGEN = 0x1000, PHY_C_PWRDN = 0x0800, PHY_C_ISO = 0x0400,
	PHY_C_RANEG = 0x0200, PHY_C_DUPLEX = 0x0100, PHY_C_COLT = 0x0080,
};
#define DM9161_PHY_C_ANEGEN 0	/* auto nego special */

/* PHY_STAT */
enum PHY_STAT_BIT {
	PHY_S_100T4 = 0x8000, PHY_S_100X_F = 0x4000, PHY_S_100X_H = 0x2000,
	PHY_S_10T_F = 0x1000, PHY_S_10T_H = 0x0800, PHY_S_ANEGC = 0x0020,
	PHY_S_RFAULT = 0x0010, PHY_S_ANEGA = 0x0008, PHY_S_LINK = 0x0004,
	PHY_S_JAB = 0x0002, PHY_S_EXTD = 0x0001,
};

/* PHY_ANA */
enum PHY_ANA_BIT {
	PHY_A_NP = 0x8000, PHY_A_ACK = 0x4000, PHY_A_RF = 0x2000,
	PHY_A_FCS = 0x0400, PHY_A_T4 = 0x0200, PHY_A_FDX = 0x0100,
	PHY_A_HDX = 0x0080, PHY_A_10FDX = 0x0040, PHY_A_10HDX = 0x0020,
	PHY_A_SEL = 0x001f,
};
/* PHY_ANL */
enum PHY_ANL_BIT {
	PHY_L_NP = 0x8000, PHY_L_ACK = 0x4000, PHY_L_RF = 0x2000,
	PHY_L_FCS = 0x0400, PHY_L_T4 = 0x0200, PHY_L_FDX = 0x0100,
	PHY_L_HDX = 0x0080, PHY_L_10FDX = 0x0040, PHY_L_10HDX = 0x0020,
	PHY_L_SEL = 0x001f,
};

/* PHY_ANE */
enum PHY_ANE_BIT {
	PHY_E_PDF = 0x0010, PHY_E_LPNPA = 0x0008, PHY_E_NPA = 0x0004,
	PHY_E_PRX = 0x0002, PHY_E_LPANEGA = 0x0001,
};

/* DM9161 */
enum PHY_16_BIT {
	PHY_16_BP4B45 = 0x8000, PHY_16_BPSCR = 0x4000, PHY_16_BPALIGN = 0x2000,
	PHY_16_BP_ADPOK = 0x1000, PHY_16_Repeatmode = 0x0800,
	PHY_16_TXselect = 0x0400,
	PHY_16_Rsvd = 0x0200, PHY_16_RMIIEnable = 0x0100,
	PHY_16_Force100LNK = 0x0080,
	PHY_16_APDLED_CTL = 0x0040, PHY_16_COLLED_CTL = 0x0020,
	PHY_16_RPDCTR_EN = 0x0010,
	PHY_16_ResetStMch = 0x0008, PHY_16_PreamSupr = 0x0004,
	PHY_16_Sleepmode = 0x0002,
	PHY_16_RemoteLoopOut = 0x0001,
};

#define POST_RX		0x08
#define POST_FW		0x04
#define POST0_RX	(POST_RX)
#define POST0_FW	(POST_FW)
#define POST1_RX	(POST_RX >> 2)
#define POST1_FW	(POST_FW >> 2)
#define POST_ALL	(POST0_RX | POST0_FW | POST1_RX | POST1_FW)

/* ARSTR */
enum ARSTR_BIT { ARSTR_ARSTR = 0x00000001, };

/* TSU_FWEN0 */
enum TSU_FWEN0_BIT {
	TSU_FWEN0_0 = 0x00000001,
};

/* TSU_ADSBSY */
enum TSU_ADSBSY_BIT {
	TSU_ADSBSY_0 = 0x00000001,
};

/* TSU_TEN */
enum TSU_TEN_BIT {
	TSU_TEN_0 = 0x80000000,
};

/* TSU_FWSL0 */
enum TSU_FWSL0_BIT {
	TSU_FWSL0_FW50 = 0x1000, TSU_FWSL0_FW40 = 0x0800,
	TSU_FWSL0_FW30 = 0x0400, TSU_FWSL0_FW20 = 0x0200,
	TSU_FWSL0_FW10 = 0x0100, TSU_FWSL0_RMSA0 = 0x0010,
};

/* TSU_FWSLC */
enum TSU_FWSLC_BIT {
	TSU_FWSLC_POSTENU = 0x2000, TSU_FWSLC_POSTENL = 0x1000,
	TSU_FWSLC_CAMSEL03 = 0x0080, TSU_FWSLC_CAMSEL02 = 0x0040,
	TSU_FWSLC_CAMSEL01 = 0x0020, TSU_FWSLC_CAMSEL00 = 0x0010,
	TSU_FWSLC_CAMSEL13 = 0x0008, TSU_FWSLC_CAMSEL12 = 0x0004,
	TSU_FWSLC_CAMSEL11 = 0x0002, TSU_FWSLC_CAMSEL10 = 0x0001,
};

/*
 * The sh ether Tx buffer descriptors.
 * This structure should be 20 bytes.
 */
struct sh_eth_txdesc {
	u32 status;		/* TD0 */
#if defined(CONFIG_CPU_LITTLE_ENDIAN)
	u16 pad0;		/* TD1 */
	u16 buffer_length;	/* TD1 */
#else
	u16 buffer_length;	/* TD1 */
	u16 pad0;		/* TD1 */
#endif
	u32 addr;		/* TD2 */
	u32 pad1;		/* padding data */
};

/*
 * The sh ether Rx buffer descriptors.
 * This structure should be 20 bytes.
 */
struct sh_eth_rxdesc {
	u32 status;		/* RD0 */
#if defined(CONFIG_CPU_LITTLE_ENDIAN)
	u16 frame_length;	/* RD1 */
	u16 buffer_length;	/* RD1 */
#else
	u16 buffer_length;	/* RD1 */
	u16 frame_length;	/* RD1 */
#endif
	u32 addr;		/* RD2 */
	u32 pad0;		/* padding data */
};

struct sh_eth_private {
	dma_addr_t rx_desc_dma;
	dma_addr_t tx_desc_dma;
	struct sh_eth_rxdesc *rx_ring;
	struct sh_eth_txdesc *tx_ring;
	struct sk_buff **rx_skbuff;
	struct sk_buff **tx_skbuff;
	struct net_device_stats stats;
	struct timer_list timer;
	spinlock_t lock;
	u32 cur_rx, dirty_rx;	/* Producer/consumer ring indices */
	u32 cur_tx, dirty_tx;
	u32 rx_buf_sz;		/* Based on MTU+slack. */
	/* MII transceiver section. */
	u32 phy_id;					/* PHY ID */
	struct mii_bus *mii_bus;	/* MDIO bus control */
	struct phy_device *phydev;	/* PHY device control */
	enum phy_state link;
	int msg_enable;
	int speed;
	int duplex;
	u32 rx_int_var, tx_int_var;	/* interrupt control variables */
	char post_rx;		/* POST receive */
	char post_fw;		/* POST forward */
	struct net_device_stats tsu_stats;	/* TSU forward status */
};

static void swaps(char *src, int len)
{
#ifdef __LITTLE_ENDIAN__
	u32 *p = (u32 *)src;
	u32 *maxp;
	maxp = p + ((len + sizeof(u32) - 1) / sizeof(u32));

	for (; p < maxp; p++)
		*p = swab32(*p);
#endif
}