net: macb: Disable half duplex gigabit on Zynq

[deliverable/linux.git] / drivers / net / ethernet / cadence / macb.h

/*
 * Atmel MACB Ethernet Controller driver
 *
 * Copyright (C) 2004-2006 Atmel Corporation
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 */
#ifndef _MACB_H
#define _MACB_H

#define MACB_GREGS_NBR 16
#define MACB_GREGS_VERSION 2
#define MACB_MAX_QUEUES 8

/* MACB register offsets */
#define MACB_NCR                0x0000 /* Network Control */
#define MACB_NCFGR              0x0004 /* Network Config */
#define MACB_NSR                0x0008 /* Network Status */
#define MACB_TAR                0x000c /* AT91RM9200 only */
#define MACB_TCR                0x0010 /* AT91RM9200 only */
#define MACB_TSR                0x0014 /* Transmit Status */
#define MACB_RBQP               0x0018 /* RX Q Base Address */
#define MACB_TBQP               0x001c /* TX Q Base Address */
#define MACB_RSR                0x0020 /* Receive Status */
#define MACB_ISR                0x0024 /* Interrupt Status */
#define MACB_IER                0x0028 /* Interrupt Enable */
#define MACB_IDR                0x002c /* Interrupt Disable */
#define MACB_IMR                0x0030 /* Interrupt Mask */
#define MACB_MAN                0x0034 /* PHY Maintenance */
#define MACB_PTR                0x0038
#define MACB_PFR                0x003c
#define MACB_FTO                0x0040
#define MACB_SCF                0x0044
#define MACB_MCF                0x0048
#define MACB_FRO                0x004c
#define MACB_FCSE               0x0050
#define MACB_ALE                0x0054
#define MACB_DTF                0x0058
#define MACB_LCOL               0x005c
#define MACB_EXCOL              0x0060
#define MACB_TUND               0x0064
#define MACB_CSE                0x0068
#define MACB_RRE                0x006c
#define MACB_ROVR               0x0070
#define MACB_RSE                0x0074
#define MACB_ELE                0x0078
#define MACB_RJA                0x007c
#define MACB_USF                0x0080
#define MACB_STE                0x0084
#define MACB_RLE                0x0088
#define MACB_TPF                0x008c
#define MACB_HRB                0x0090
#define MACB_HRT                0x0094
#define MACB_SA1B               0x0098
#define MACB_SA1T               0x009c
#define MACB_SA2B               0x00a0
#define MACB_SA2T               0x00a4
#define MACB_SA3B               0x00a8
#define MACB_SA3T               0x00ac
#define MACB_SA4B               0x00b0
#define MACB_SA4T               0x00b4
#define MACB_TID                0x00b8
#define MACB_TPQ                0x00bc
#define MACB_USRIO              0x00c0
#define MACB_WOL                0x00c4
#define MACB_MID                0x00fc

/* GEM register offsets. */
#define GEM_NCFGR               0x0004 /* Network Config */
#define GEM_USRIO               0x000c /* User IO */
#define GEM_DMACFG              0x0010 /* DMA Configuration */
#define GEM_HRB                 0x0080 /* Hash Bottom */
#define GEM_HRT                 0x0084 /* Hash Top */
#define GEM_SA1B                0x0088 /* Specific1 Bottom */
#define GEM_SA1T                0x008C /* Specific1 Top */
#define GEM_SA2B                0x0090 /* Specific2 Bottom */
#define GEM_SA2T                0x0094 /* Specific2 Top */
#define GEM_SA3B                0x0098 /* Specific3 Bottom */
#define GEM_SA3T                0x009C /* Specific3 Top */
#define GEM_SA4B                0x00A0 /* Specific4 Bottom */
#define GEM_SA4T                0x00A4 /* Specific4 Top */
#define GEM_OTX                 0x0100 /* Octets transmitted */
#define GEM_OCTTXL              0x0100 /* Octets transmitted [31:0] */
#define GEM_OCTTXH              0x0104 /* Octets transmitted [47:32] */
#define GEM_TXCNT               0x0108 /* Frames Transmitted counter */
#define GEM_TXBCCNT             0x010c /* Broadcast Frames counter */
#define GEM_TXMCCNT             0x0110 /* Multicast Frames counter */
#define GEM_TXPAUSECNT          0x0114 /* Pause Frames Transmitted Counter */
#define GEM_TX64CNT             0x0118 /* 64 byte Frames TX counter */
#define GEM_TX65CNT             0x011c /* 65-127 byte Frames TX counter */
#define GEM_TX128CNT            0x0120 /* 128-255 byte Frames TX counter */
#define GEM_TX256CNT            0x0124 /* 256-511 byte Frames TX counter */
#define GEM_TX512CNT            0x0128 /* 512-1023 byte Frames TX counter */
#define GEM_TX1024CNT           0x012c /* 1024-1518 byte Frames TX counter */
#define GEM_TX1519CNT           0x0130 /* 1519+ byte Frames TX counter */
#define GEM_TXURUNCNT           0x0134 /* TX under run error counter */
#define GEM_SNGLCOLLCNT         0x0138 /* Single Collision Frame Counter */
#define GEM_MULTICOLLCNT        0x013c /* Multiple Collision Frame Counter */
#define GEM_EXCESSCOLLCNT       0x0140 /* Excessive Collision Frame Counter */
#define GEM_LATECOLLCNT         0x0144 /* Late Collision Frame Counter */
#define GEM_TXDEFERCNT          0x0148 /* Deferred Transmission Frame Counter */
#define GEM_TXCSENSECNT         0x014c /* Carrier Sense Error Counter */
#define GEM_ORX                 0x0150 /* Octets received */
#define GEM_OCTRXL              0x0150 /* Octets received [31:0] */
#define GEM_OCTRXH              0x0154 /* Octets received [47:32] */
#define GEM_RXCNT               0x0158 /* Frames Received Counter */
#define GEM_RXBROADCNT          0x015c /* Broadcast Frames Received Counter */
#define GEM_RXMULTICNT          0x0160 /* Multicast Frames Received Counter */
#define GEM_RXPAUSECNT          0x0164 /* Pause Frames Received Counter */
#define GEM_RX64CNT             0x0168 /* 64 byte Frames RX Counter */
#define GEM_RX65CNT             0x016c /* 65-127 byte Frames RX Counter */
#define GEM_RX128CNT            0x0170 /* 128-255 byte Frames RX Counter */
#define GEM_RX256CNT            0x0174 /* 256-511 byte Frames RX Counter */
#define GEM_RX512CNT            0x0178 /* 512-1023 byte Frames RX Counter */
#define GEM_RX1024CNT           0x017c /* 1024-1518 byte Frames RX Counter */
#define GEM_RX1519CNT           0x0180 /* 1519+ byte Frames RX Counter */
#define GEM_RXUNDRCNT           0x0184 /* Undersize Frames Received Counter */
#define GEM_RXOVRCNT            0x0188 /* Oversize Frames Received Counter */
#define GEM_RXJABCNT            0x018c /* Jabbers Received Counter */
#define GEM_RXFCSCNT            0x0190 /* Frame Check Sequence Error Counter */
#define GEM_RXLENGTHCNT         0x0194 /* Length Field Error Counter */
#define GEM_RXSYMBCNT           0x0198 /* Symbol Error Counter */
#define GEM_RXALIGNCNT          0x019c /* Alignment Error Counter */
#define GEM_RXRESERRCNT         0x01a0 /* Receive Resource Error Counter */
#define GEM_RXORCNT             0x01a4 /* Receive Overrun Counter */
#define GEM_RXIPCCNT            0x01a8 /* IP header Checksum Error Counter */
#define GEM_RXTCPCCNT           0x01ac /* TCP Checksum Error Counter */
#define GEM_RXUDPCCNT           0x01b0 /* UDP Checksum Error Counter */
#define GEM_DCFG1               0x0280 /* Design Config 1 */
#define GEM_DCFG2               0x0284 /* Design Config 2 */
#define GEM_DCFG3               0x0288 /* Design Config 3 */
#define GEM_DCFG4               0x028c /* Design Config 4 */
#define GEM_DCFG5               0x0290 /* Design Config 5 */
#define GEM_DCFG6               0x0294 /* Design Config 6 */
#define GEM_DCFG7               0x0298 /* Design Config 7 */

#define GEM_ISR(hw_q)           (0x0400 + ((hw_q) << 2))
#define GEM_TBQP(hw_q)          (0x0440 + ((hw_q) << 2))
#define GEM_RBQP(hw_q)          (0x0480 + ((hw_q) << 2))
#define GEM_IER(hw_q)           (0x0600 + ((hw_q) << 2))
#define GEM_IDR(hw_q)           (0x0620 + ((hw_q) << 2))
#define GEM_IMR(hw_q)           (0x0640 + ((hw_q) << 2))

/* Bitfields in NCR */
#define MACB_LB_OFFSET          0 /* reserved */
#define MACB_LB_SIZE            1
#define MACB_LLB_OFFSET         1 /* Loop back local */
#define MACB_LLB_SIZE           1
#define MACB_RE_OFFSET          2 /* Receive enable */
#define MACB_RE_SIZE            1
#define MACB_TE_OFFSET          3 /* Transmit enable */
#define MACB_TE_SIZE            1
#define MACB_MPE_OFFSET         4 /* Management port enable */
#define MACB_MPE_SIZE           1
#define MACB_CLRSTAT_OFFSET     5 /* Clear stats regs */
#define MACB_CLRSTAT_SIZE       1
#define MACB_INCSTAT_OFFSET     6 /* Incremental stats regs */
#define MACB_INCSTAT_SIZE       1
#define MACB_WESTAT_OFFSET      7 /* Write enable stats regs */
#define MACB_WESTAT_SIZE        1
#define MACB_BP_OFFSET          8 /* Back pressure */
#define MACB_BP_SIZE            1
#define MACB_TSTART_OFFSET      9 /* Start transmission */
#define MACB_TSTART_SIZE        1
#define MACB_THALT_OFFSET       10 /* Transmit halt */
#define MACB_THALT_SIZE         1
#define MACB_NCR_TPF_OFFSET     11 /* Transmit pause frame */
#define MACB_NCR_TPF_SIZE       1
#define MACB_TZQ_OFFSET         12 /* Transmit zero quantum pause frame */
#define MACB_TZQ_SIZE           1

/* Bitfields in NCFGR */
#define MACB_SPD_OFFSET         0 /* Speed */
#define MACB_SPD_SIZE           1
#define MACB_FD_OFFSET          1 /* Full duplex */
#define MACB_FD_SIZE            1
#define MACB_BIT_RATE_OFFSET    2 /* Discard non-VLAN frames */
#define MACB_BIT_RATE_SIZE      1
#define MACB_JFRAME_OFFSET      3 /* reserved */
#define MACB_JFRAME_SIZE        1
#define MACB_CAF_OFFSET         4 /* Copy all frames */
#define MACB_CAF_SIZE           1
#define MACB_NBC_OFFSET         5 /* No broadcast */
#define MACB_NBC_SIZE           1
#define MACB_NCFGR_MTI_OFFSET   6 /* Multicast hash enable */
#define MACB_NCFGR_MTI_SIZE     1
#define MACB_UNI_OFFSET         7 /* Unicast hash enable */
#define MACB_UNI_SIZE           1
#define MACB_BIG_OFFSET         8 /* Receive 1536 byte frames */
#define MACB_BIG_SIZE           1
#define MACB_EAE_OFFSET         9 /* External address match enable */
#define MACB_EAE_SIZE           1
#define MACB_CLK_OFFSET         10
#define MACB_CLK_SIZE           2
#define MACB_RTY_OFFSET         12 /* Retry test */
#define MACB_RTY_SIZE           1
#define MACB_PAE_OFFSET         13 /* Pause enable */
#define MACB_PAE_SIZE           1
#define MACB_RM9200_RMII_OFFSET 13 /* AT91RM9200 only */
#define MACB_RM9200_RMII_SIZE   1  /* AT91RM9200 only */
#define MACB_RBOF_OFFSET        14 /* Receive buffer offset */
#define MACB_RBOF_SIZE          2
#define MACB_RLCE_OFFSET        16 /* Length field error frame discard */
#define MACB_RLCE_SIZE          1
#define MACB_DRFCS_OFFSET       17 /* FCS remove */
#define MACB_DRFCS_SIZE         1
#define MACB_EFRHD_OFFSET       18
#define MACB_EFRHD_SIZE         1
#define MACB_IRXFCS_OFFSET      19
#define MACB_IRXFCS_SIZE        1

/* GEM specific NCFGR bitfields. */
#define GEM_GBE_OFFSET          10 /* Gigabit mode enable */
#define GEM_GBE_SIZE            1
#define GEM_CLK_OFFSET          18 /* MDC clock division */
#define GEM_CLK_SIZE            3
#define GEM_DBW_OFFSET          21 /* Data bus width */
#define GEM_DBW_SIZE            2
#define GEM_RXCOEN_OFFSET       24
#define GEM_RXCOEN_SIZE         1

/* Constants for data bus width. */
#define GEM_DBW32               0 /* 32 bit AMBA AHB data bus width */
#define GEM_DBW64               1 /* 64 bit AMBA AHB data bus width */
#define GEM_DBW128              2 /* 128 bit AMBA AHB data bus width */

/* Bitfields in DMACFG. */
#define GEM_FBLDO_OFFSET        0 /* fixed burst length for DMA */
#define GEM_FBLDO_SIZE          5
#define GEM_ENDIA_DESC_OFFSET   6 /* endian swap mode for management descriptor access */
#define GEM_ENDIA_DESC_SIZE     1
#define GEM_ENDIA_PKT_OFFSET    7 /* endian swap mode for packet data access */
#define GEM_ENDIA_PKT_SIZE      1
#define GEM_RXBMS_OFFSET        8 /* RX packet buffer memory size select */
#define GEM_RXBMS_SIZE          2
#define GEM_TXPBMS_OFFSET       10 /* TX packet buffer memory size select */
#define GEM_TXPBMS_SIZE         1
#define GEM_TXCOEN_OFFSET       11 /* TX IP/TCP/UDP checksum gen offload */
#define GEM_TXCOEN_SIZE         1
#define GEM_RXBS_OFFSET         16 /* DMA receive buffer size */
#define GEM_RXBS_SIZE           8
#define GEM_DDRP_OFFSET         24 /* disc_when_no_ahb */
#define GEM_DDRP_SIZE           1


/* Bitfields in NSR */
#define MACB_NSR_LINK_OFFSET    0 /* pcs_link_state */
#define MACB_NSR_LINK_SIZE      1
#define MACB_MDIO_OFFSET        1 /* status of the mdio_in pin */
#define MACB_MDIO_SIZE          1
#define MACB_IDLE_OFFSET        2 /* The PHY management logic is idle */
#define MACB_IDLE_SIZE          1

/* Bitfields in TSR */
#define MACB_UBR_OFFSET         0 /* Used bit read */
#define MACB_UBR_SIZE           1
#define MACB_COL_OFFSET         1 /* Collision occurred */
#define MACB_COL_SIZE           1
#define MACB_TSR_RLE_OFFSET     2 /* Retry limit exceeded */
#define MACB_TSR_RLE_SIZE       1
#define MACB_TGO_OFFSET         3 /* Transmit go */
#define MACB_TGO_SIZE           1
#define MACB_BEX_OFFSET         4 /* TX frame corruption due to AHB error */
#define MACB_BEX_SIZE           1
#define MACB_RM9200_BNQ_OFFSET  4 /* AT91RM9200 only */
#define MACB_RM9200_BNQ_SIZE    1 /* AT91RM9200 only */
#define MACB_COMP_OFFSET        5 /* Trnasmit complete */
#define MACB_COMP_SIZE          1
#define MACB_UND_OFFSET         6 /* Trnasmit under run */
#define MACB_UND_SIZE           1

/* Bitfields in RSR */
#define MACB_BNA_OFFSET         0 /* Buffer not available */
#define MACB_BNA_SIZE           1
#define MACB_REC_OFFSET         1 /* Frame received */
#define MACB_REC_SIZE           1
#define MACB_OVR_OFFSET         2 /* Receive overrun */
#define MACB_OVR_SIZE           1

/* Bitfields in ISR/IER/IDR/IMR */
#define MACB_MFD_OFFSET         0 /* Management frame sent */
#define MACB_MFD_SIZE           1
#define MACB_RCOMP_OFFSET       1 /* Receive complete */
#define MACB_RCOMP_SIZE         1
#define MACB_RXUBR_OFFSET       2 /* RX used bit read */
#define MACB_RXUBR_SIZE         1
#define MACB_TXUBR_OFFSET       3 /* TX used bit read */
#define MACB_TXUBR_SIZE         1
#define MACB_ISR_TUND_OFFSET    4 /* Enable TX buffer under run interrupt */
#define MACB_ISR_TUND_SIZE      1
#define MACB_ISR_RLE_OFFSET     5 /* EN retry exceeded/late coll interrupt */
#define MACB_ISR_RLE_SIZE       1
#define MACB_TXERR_OFFSET       6 /* EN TX frame corrupt from error interrupt */
#define MACB_TXERR_SIZE         1
#define MACB_TCOMP_OFFSET       7 /* Enable transmit complete interrupt */
#define MACB_TCOMP_SIZE         1
#define MACB_ISR_LINK_OFFSET    9 /* Enable link change interrupt */
#define MACB_ISR_LINK_SIZE      1
#define MACB_ISR_ROVR_OFFSET    10 /* Enable receive overrun interrupt */
#define MACB_ISR_ROVR_SIZE      1
#define MACB_HRESP_OFFSET       11 /* Enable hrsep not OK interrupt */
#define MACB_HRESP_SIZE         1
#define MACB_PFR_OFFSET         12 /* Enable pause frame w/ quantum interrupt */
#define MACB_PFR_SIZE           1
#define MACB_PTZ_OFFSET         13 /* Enable pause time zero interrupt */
#define MACB_PTZ_SIZE           1

/* Bitfields in MAN */
#define MACB_DATA_OFFSET        0 /* data */
#define MACB_DATA_SIZE          16
#define MACB_CODE_OFFSET        16 /* Must be written to 10 */
#define MACB_CODE_SIZE          2
#define MACB_REGA_OFFSET        18 /* Register address */
#define MACB_REGA_SIZE          5
#define MACB_PHYA_OFFSET        23 /* PHY address */
#define MACB_PHYA_SIZE          5
#define MACB_RW_OFFSET          28 /* Operation. 10 is read. 01 is write. */
#define MACB_RW_SIZE            2
#define MACB_SOF_OFFSET         30 /* Must be written to 1 for Clause 22 */
#define MACB_SOF_SIZE           2

/* Bitfields in USRIO (AVR32) */
#define MACB_MII_OFFSET                         0
#define MACB_MII_SIZE                           1
#define MACB_EAM_OFFSET                         1
#define MACB_EAM_SIZE                           1
#define MACB_TX_PAUSE_OFFSET                    2
#define MACB_TX_PAUSE_SIZE                      1
#define MACB_TX_PAUSE_ZERO_OFFSET               3
#define MACB_TX_PAUSE_ZERO_SIZE                 1

/* Bitfields in USRIO (AT91) */
#define MACB_RMII_OFFSET                        0
#define MACB_RMII_SIZE                          1
#define GEM_RGMII_OFFSET                        0 /* GEM gigabit mode */
#define GEM_RGMII_SIZE                          1
#define MACB_CLKEN_OFFSET                       1
#define MACB_CLKEN_SIZE                         1

/* Bitfields in WOL */
#define MACB_IP_OFFSET                          0
#define MACB_IP_SIZE                            16
#define MACB_MAG_OFFSET                         16
#define MACB_MAG_SIZE                           1
#define MACB_ARP_OFFSET                         17
#define MACB_ARP_SIZE                           1
#define MACB_SA1_OFFSET                         18
#define MACB_SA1_SIZE                           1
#define MACB_WOL_MTI_OFFSET                     19
#define MACB_WOL_MTI_SIZE                       1

/* Bitfields in MID */
#define MACB_IDNUM_OFFSET                       16
#define MACB_IDNUM_SIZE                         12
#define MACB_REV_OFFSET                         0
#define MACB_REV_SIZE                           16

/* Bitfields in DCFG1. */
#define GEM_IRQCOR_OFFSET                       23
#define GEM_IRQCOR_SIZE                         1
#define GEM_DBWDEF_OFFSET                       25
#define GEM_DBWDEF_SIZE                         3

/* Bitfields in DCFG2. */
#define GEM_RX_PKT_BUFF_OFFSET                  20
#define GEM_RX_PKT_BUFF_SIZE                    1
#define GEM_TX_PKT_BUFF_OFFSET                  21
#define GEM_TX_PKT_BUFF_SIZE                    1

/* Constants for CLK */
#define MACB_CLK_DIV8                           0
#define MACB_CLK_DIV16                          1
#define MACB_CLK_DIV32                          2
#define MACB_CLK_DIV64                          3

/* GEM specific constants for CLK. */
#define GEM_CLK_DIV8                            0
#define GEM_CLK_DIV16                           1
#define GEM_CLK_DIV32                           2
#define GEM_CLK_DIV48                           3
#define GEM_CLK_DIV64                           4
#define GEM_CLK_DIV96                           5

/* Constants for MAN register */
#define MACB_MAN_SOF                            1
#define MACB_MAN_WRITE                          1
#define MACB_MAN_READ                           2
#define MACB_MAN_CODE                           2

/* Capability mask bits */
#define MACB_CAPS_ISR_CLEAR_ON_WRITE            0x00000001
#define MACB_CAPS_USRIO_HAS_CLKEN               0x00000002
#define MACB_CAPS_USRIO_DEFAULT_IS_MII          0x00000004
#define MACB_CAPS_NO_GIGABIT_HALF               0x00000008
#define MACB_CAPS_FIFO_MODE                     0x10000000
#define MACB_CAPS_GIGABIT_MODE_AVAILABLE        0x20000000
#define MACB_CAPS_SG_DISABLED                   0x40000000
#define MACB_CAPS_MACB_IS_GEM                   0x80000000

/* Bit manipulation macros */
#define MACB_BIT(name)                                  \
        (1 << MACB_##name##_OFFSET)
#define MACB_BF(name,value)                             \
        (((value) & ((1 << MACB_##name##_SIZE) - 1))    \
         << MACB_##name##_OFFSET)
#define MACB_BFEXT(name,value)\
        (((value) >> MACB_##name##_OFFSET)              \
         & ((1 << MACB_##name##_SIZE) - 1))
#define MACB_BFINS(name,value,old)                      \
        (((old) & ~(((1 << MACB_##name##_SIZE) - 1)     \
                    << MACB_##name##_OFFSET))           \
         | MACB_BF(name,value))

#define GEM_BIT(name)                                   \
        (1 << GEM_##name##_OFFSET)
#define GEM_BF(name, value)                             \
        (((value) & ((1 << GEM_##name##_SIZE) - 1))     \
         << GEM_##name##_OFFSET)
#define GEM_BFEXT(name, value)\
        (((value) >> GEM_##name##_OFFSET)               \
         & ((1 << GEM_##name##_SIZE) - 1))
#define GEM_BFINS(name, value, old)                     \
        (((old) & ~(((1 << GEM_##name##_SIZE) - 1)      \
                    << GEM_##name##_OFFSET))            \
         | GEM_BF(name, value))

/* Register access macros */
#define macb_readl(port,reg)                            \
        readl_relaxed((port)->regs + MACB_##reg)
#define macb_writel(port,reg,value)                     \
        writel_relaxed((value), (port)->regs + MACB_##reg)
#define gem_readl(port, reg)                            \
        readl_relaxed((port)->regs + GEM_##reg)
#define gem_writel(port, reg, value)                    \
        writel_relaxed((value), (port)->regs + GEM_##reg)
#define queue_readl(queue, reg)                         \
        readl_relaxed((queue)->bp->regs + (queue)->reg)
#define queue_writel(queue, reg, value)                 \
        writel_relaxed((value), (queue)->bp->regs + (queue)->reg)

/* Conditional GEM/MACB macros.  These perform the operation to the correct
 * register dependent on whether the device is a GEM or a MACB.  For registers
 * and bitfields that are common across both devices, use macb_{read,write}l
 * to avoid the cost of the conditional.
 */
#define macb_or_gem_writel(__bp, __reg, __value) \
        ({ \
                if (macb_is_gem((__bp))) \
                        gem_writel((__bp), __reg, __value); \
                else \
                        macb_writel((__bp), __reg, __value); \
        })

#define macb_or_gem_readl(__bp, __reg) \
        ({ \
                u32 __v; \
                if (macb_is_gem((__bp))) \
                        __v = gem_readl((__bp), __reg); \
                else \
                        __v = macb_readl((__bp), __reg); \
                __v; \
        })

/* struct macb_dma_desc - Hardware DMA descriptor
 * @addr: DMA address of data buffer
 * @ctrl: Control and status bits
 */
struct macb_dma_desc {
        u32     addr;
        u32     ctrl;
};

/* DMA descriptor bitfields */
#define MACB_RX_USED_OFFSET                     0
#define MACB_RX_USED_SIZE                       1
#define MACB_RX_WRAP_OFFSET                     1
#define MACB_RX_WRAP_SIZE                       1
#define MACB_RX_WADDR_OFFSET                    2
#define MACB_RX_WADDR_SIZE                      30

#define MACB_RX_FRMLEN_OFFSET                   0
#define MACB_RX_FRMLEN_SIZE                     12
#define MACB_RX_OFFSET_OFFSET                   12
#define MACB_RX_OFFSET_SIZE                     2
#define MACB_RX_SOF_OFFSET                      14
#define MACB_RX_SOF_SIZE                        1
#define MACB_RX_EOF_OFFSET                      15
#define MACB_RX_EOF_SIZE                        1
#define MACB_RX_CFI_OFFSET                      16
#define MACB_RX_CFI_SIZE                        1
#define MACB_RX_VLAN_PRI_OFFSET                 17
#define MACB_RX_VLAN_PRI_SIZE                   3
#define MACB_RX_PRI_TAG_OFFSET                  20
#define MACB_RX_PRI_TAG_SIZE                    1
#define MACB_RX_VLAN_TAG_OFFSET                 21
#define MACB_RX_VLAN_TAG_SIZE                   1
#define MACB_RX_TYPEID_MATCH_OFFSET             22
#define MACB_RX_TYPEID_MATCH_SIZE               1
#define MACB_RX_SA4_MATCH_OFFSET                23
#define MACB_RX_SA4_MATCH_SIZE                  1
#define MACB_RX_SA3_MATCH_OFFSET                24
#define MACB_RX_SA3_MATCH_SIZE                  1
#define MACB_RX_SA2_MATCH_OFFSET                25
#define MACB_RX_SA2_MATCH_SIZE                  1
#define MACB_RX_SA1_MATCH_OFFSET                26
#define MACB_RX_SA1_MATCH_SIZE                  1
#define MACB_RX_EXT_MATCH_OFFSET                28
#define MACB_RX_EXT_MATCH_SIZE                  1
#define MACB_RX_UHASH_MATCH_OFFSET              29
#define MACB_RX_UHASH_MATCH_SIZE                1
#define MACB_RX_MHASH_MATCH_OFFSET              30
#define MACB_RX_MHASH_MATCH_SIZE                1
#define MACB_RX_BROADCAST_OFFSET                31
#define MACB_RX_BROADCAST_SIZE                  1

/* RX checksum offload disabled: bit 24 clear in NCFGR */
#define GEM_RX_TYPEID_MATCH_OFFSET              22
#define GEM_RX_TYPEID_MATCH_SIZE                2

/* RX checksum offload enabled: bit 24 set in NCFGR */
#define GEM_RX_CSUM_OFFSET                      22
#define GEM_RX_CSUM_SIZE                        2

#define MACB_TX_FRMLEN_OFFSET                   0
#define MACB_TX_FRMLEN_SIZE                     11
#define MACB_TX_LAST_OFFSET                     15
#define MACB_TX_LAST_SIZE                       1
#define MACB_TX_NOCRC_OFFSET                    16
#define MACB_TX_NOCRC_SIZE                      1
#define MACB_TX_BUF_EXHAUSTED_OFFSET            27
#define MACB_TX_BUF_EXHAUSTED_SIZE              1
#define MACB_TX_UNDERRUN_OFFSET                 28
#define MACB_TX_UNDERRUN_SIZE                   1
#define MACB_TX_ERROR_OFFSET                    29
#define MACB_TX_ERROR_SIZE                      1
#define MACB_TX_WRAP_OFFSET                     30
#define MACB_TX_WRAP_SIZE                       1
#define MACB_TX_USED_OFFSET                     31
#define MACB_TX_USED_SIZE                       1

#define GEM_TX_FRMLEN_OFFSET                    0
#define GEM_TX_FRMLEN_SIZE                      14

/* Buffer descriptor constants */
#define GEM_RX_CSUM_NONE                        0
#define GEM_RX_CSUM_IP_ONLY                     1
#define GEM_RX_CSUM_IP_TCP                      2
#define GEM_RX_CSUM_IP_UDP                      3

/* limit RX checksum offload to TCP and UDP packets */
#define GEM_RX_CSUM_CHECKED_MASK                2

/* struct macb_tx_skb - data about an skb which is being transmitted
 * @skb: skb currently being transmitted, only set for the last buffer
 *       of the frame
 * @mapping: DMA address of the skb's fragment buffer
 * @size: size of the DMA mapped buffer
 * @mapped_as_page: true when buffer was mapped with skb_frag_dma_map(),
 *                  false when buffer was mapped with dma_map_single()
 */
struct macb_tx_skb {
        struct sk_buff          *skb;
        dma_addr_t              mapping;
        size_t                  size;
        bool                    mapped_as_page;
};

/* Hardware-collected statistics. Used when updating the network
 * device stats by a periodic timer.
 */
struct macb_stats {
        u32     rx_pause_frames;
        u32     tx_ok;
        u32     tx_single_cols;
        u32     tx_multiple_cols;
        u32     rx_ok;
        u32     rx_fcs_errors;
        u32     rx_align_errors;
        u32     tx_deferred;
        u32     tx_late_cols;
        u32     tx_excessive_cols;
        u32     tx_underruns;
        u32     tx_carrier_errors;
        u32     rx_resource_errors;
        u32     rx_overruns;
        u32     rx_symbol_errors;
        u32     rx_oversize_pkts;
        u32     rx_jabbers;
        u32     rx_undersize_pkts;
        u32     sqe_test_errors;
        u32     rx_length_mismatch;
        u32     tx_pause_frames;
};

struct gem_stats {
        u32     tx_octets_31_0;
        u32     tx_octets_47_32;
        u32     tx_frames;
        u32     tx_broadcast_frames;
        u32     tx_multicast_frames;
        u32     tx_pause_frames;
        u32     tx_64_byte_frames;
        u32     tx_65_127_byte_frames;
        u32     tx_128_255_byte_frames;
        u32     tx_256_511_byte_frames;
        u32     tx_512_1023_byte_frames;
        u32     tx_1024_1518_byte_frames;
        u32     tx_greater_than_1518_byte_frames;
        u32     tx_underrun;
        u32     tx_single_collision_frames;
        u32     tx_multiple_collision_frames;
        u32     tx_excessive_collisions;
        u32     tx_late_collisions;
        u32     tx_deferred_frames;
        u32     tx_carrier_sense_errors;
        u32     rx_octets_31_0;
        u32     rx_octets_47_32;
        u32     rx_frames;
        u32     rx_broadcast_frames;
        u32     rx_multicast_frames;
        u32     rx_pause_frames;
        u32     rx_64_byte_frames;
        u32     rx_65_127_byte_frames;
        u32     rx_128_255_byte_frames;
        u32     rx_256_511_byte_frames;
        u32     rx_512_1023_byte_frames;
        u32     rx_1024_1518_byte_frames;
        u32     rx_greater_than_1518_byte_frames;
        u32     rx_undersized_frames;
        u32     rx_oversize_frames;
        u32     rx_jabbers;
        u32     rx_frame_check_sequence_errors;
        u32     rx_length_field_frame_errors;
        u32     rx_symbol_errors;
        u32     rx_alignment_errors;
        u32     rx_resource_errors;
        u32     rx_overruns;
        u32     rx_ip_header_checksum_errors;
        u32     rx_tcp_checksum_errors;
        u32     rx_udp_checksum_errors;
};

/* Describes the name and offset of an individual statistic register, as
 * returned by `ethtool -S`. Also describes which net_device_stats statistics
 * this register should contribute to.
 */
struct gem_statistic {
        char stat_string[ETH_GSTRING_LEN];
        int offset;
        u32 stat_bits;
};

/* Bitfield defs for net_device_stat statistics */
#define GEM_NDS_RXERR_OFFSET            0
#define GEM_NDS_RXLENERR_OFFSET         1
#define GEM_NDS_RXOVERERR_OFFSET        2
#define GEM_NDS_RXCRCERR_OFFSET         3
#define GEM_NDS_RXFRAMEERR_OFFSET       4
#define GEM_NDS_RXFIFOERR_OFFSET        5
#define GEM_NDS_TXERR_OFFSET            6
#define GEM_NDS_TXABORTEDERR_OFFSET     7
#define GEM_NDS_TXCARRIERERR_OFFSET     8
#define GEM_NDS_TXFIFOERR_OFFSET        9
#define GEM_NDS_COLLISIONS_OFFSET       10

#define GEM_STAT_TITLE(name, title) GEM_STAT_TITLE_BITS(name, title, 0)
#define GEM_STAT_TITLE_BITS(name, title, bits) {        \
        .stat_string = title,                           \
        .offset = GEM_##name,                           \
        .stat_bits = bits                               \
}

/* list of gem statistic registers. The names MUST match the
 * corresponding GEM_* definitions.
 */
static const struct gem_statistic gem_statistics[] = {
        GEM_STAT_TITLE(OCTTXL, "tx_octets"), /* OCTTXH combined with OCTTXL */
        GEM_STAT_TITLE(TXCNT, "tx_frames"),
        GEM_STAT_TITLE(TXBCCNT, "tx_broadcast_frames"),
        GEM_STAT_TITLE(TXMCCNT, "tx_multicast_frames"),
        GEM_STAT_TITLE(TXPAUSECNT, "tx_pause_frames"),
        GEM_STAT_TITLE(TX64CNT, "tx_64_byte_frames"),
        GEM_STAT_TITLE(TX65CNT, "tx_65_127_byte_frames"),
        GEM_STAT_TITLE(TX128CNT, "tx_128_255_byte_frames"),
        GEM_STAT_TITLE(TX256CNT, "tx_256_511_byte_frames"),
        GEM_STAT_TITLE(TX512CNT, "tx_512_1023_byte_frames"),
        GEM_STAT_TITLE(TX1024CNT, "tx_1024_1518_byte_frames"),
        GEM_STAT_TITLE(TX1519CNT, "tx_greater_than_1518_byte_frames"),
        GEM_STAT_TITLE_BITS(TXURUNCNT, "tx_underrun",
                            GEM_BIT(NDS_TXERR)|GEM_BIT(NDS_TXFIFOERR)),
        GEM_STAT_TITLE_BITS(SNGLCOLLCNT, "tx_single_collision_frames",
                            GEM_BIT(NDS_TXERR)|GEM_BIT(NDS_COLLISIONS)),
        GEM_STAT_TITLE_BITS(MULTICOLLCNT, "tx_multiple_collision_frames",
                            GEM_BIT(NDS_TXERR)|GEM_BIT(NDS_COLLISIONS)),
        GEM_STAT_TITLE_BITS(EXCESSCOLLCNT, "tx_excessive_collisions",
                            GEM_BIT(NDS_TXERR)|
                            GEM_BIT(NDS_TXABORTEDERR)|
                            GEM_BIT(NDS_COLLISIONS)),
        GEM_STAT_TITLE_BITS(LATECOLLCNT, "tx_late_collisions",
                            GEM_BIT(NDS_TXERR)|GEM_BIT(NDS_COLLISIONS)),
        GEM_STAT_TITLE(TXDEFERCNT, "tx_deferred_frames"),
        GEM_STAT_TITLE_BITS(TXCSENSECNT, "tx_carrier_sense_errors",
                            GEM_BIT(NDS_TXERR)|GEM_BIT(NDS_COLLISIONS)),
        GEM_STAT_TITLE(OCTRXL, "rx_octets"), /* OCTRXH combined with OCTRXL */
        GEM_STAT_TITLE(RXCNT, "rx_frames"),
        GEM_STAT_TITLE(RXBROADCNT, "rx_broadcast_frames"),
        GEM_STAT_TITLE(RXMULTICNT, "rx_multicast_frames"),
        GEM_STAT_TITLE(RXPAUSECNT, "rx_pause_frames"),
        GEM_STAT_TITLE(RX64CNT, "rx_64_byte_frames"),
        GEM_STAT_TITLE(RX65CNT, "rx_65_127_byte_frames"),
        GEM_STAT_TITLE(RX128CNT, "rx_128_255_byte_frames"),
        GEM_STAT_TITLE(RX256CNT, "rx_256_511_byte_frames"),
        GEM_STAT_TITLE(RX512CNT, "rx_512_1023_byte_frames"),
        GEM_STAT_TITLE(RX1024CNT, "rx_1024_1518_byte_frames"),
        GEM_STAT_TITLE(RX1519CNT, "rx_greater_than_1518_byte_frames"),
        GEM_STAT_TITLE_BITS(RXUNDRCNT, "rx_undersized_frames",
                            GEM_BIT(NDS_RXERR)|GEM_BIT(NDS_RXLENERR)),
        GEM_STAT_TITLE_BITS(RXOVRCNT, "rx_oversize_frames",
                            GEM_BIT(NDS_RXERR)|GEM_BIT(NDS_RXLENERR)),
        GEM_STAT_TITLE_BITS(RXJABCNT, "rx_jabbers",
                            GEM_BIT(NDS_RXERR)|GEM_BIT(NDS_RXLENERR)),
        GEM_STAT_TITLE_BITS(RXFCSCNT, "rx_frame_check_sequence_errors",
                            GEM_BIT(NDS_RXERR)|GEM_BIT(NDS_RXCRCERR)),
        GEM_STAT_TITLE_BITS(RXLENGTHCNT, "rx_length_field_frame_errors",
                            GEM_BIT(NDS_RXERR)),
        GEM_STAT_TITLE_BITS(RXSYMBCNT, "rx_symbol_errors",
                            GEM_BIT(NDS_RXERR)|GEM_BIT(NDS_RXFRAMEERR)),
        GEM_STAT_TITLE_BITS(RXALIGNCNT, "rx_alignment_errors",
                            GEM_BIT(NDS_RXERR)|GEM_BIT(NDS_RXOVERERR)),
        GEM_STAT_TITLE_BITS(RXRESERRCNT, "rx_resource_errors",
                            GEM_BIT(NDS_RXERR)|GEM_BIT(NDS_RXOVERERR)),
        GEM_STAT_TITLE_BITS(RXORCNT, "rx_overruns",
                            GEM_BIT(NDS_RXERR)|GEM_BIT(NDS_RXFIFOERR)),
        GEM_STAT_TITLE_BITS(RXIPCCNT, "rx_ip_header_checksum_errors",
                            GEM_BIT(NDS_RXERR)),
        GEM_STAT_TITLE_BITS(RXTCPCCNT, "rx_tcp_checksum_errors",
                            GEM_BIT(NDS_RXERR)),
        GEM_STAT_TITLE_BITS(RXUDPCCNT, "rx_udp_checksum_errors",
                            GEM_BIT(NDS_RXERR)),
};

#define GEM_STATS_LEN ARRAY_SIZE(gem_statistics)

struct macb;

struct macb_or_gem_ops {
        int     (*mog_alloc_rx_buffers)(struct macb *bp);
        void    (*mog_free_rx_buffers)(struct macb *bp);
        void    (*mog_init_rings)(struct macb *bp);
        int     (*mog_rx)(struct macb *bp, int budget);
};

struct macb_config {
        u32                     caps;
        unsigned int            dma_burst_length;
        int     (*clk_init)(struct platform_device *pdev, struct clk **pclk,
                            struct clk **hclk, struct clk **tx_clk);
        int     (*init)(struct platform_device *pdev);
};

struct macb_queue {
        struct macb             *bp;
        int                     irq;

        unsigned int            ISR;
        unsigned int            IER;
        unsigned int            IDR;
        unsigned int            IMR;
        unsigned int            TBQP;

        unsigned int            tx_head, tx_tail;
        struct macb_dma_desc    *tx_ring;
        struct macb_tx_skb      *tx_skb;
        dma_addr_t              tx_ring_dma;
        struct work_struct      tx_error_task;
};

struct macb {
        void __iomem            *regs;

        unsigned int            rx_tail;
        unsigned int            rx_prepared_head;
        struct macb_dma_desc    *rx_ring;
        struct sk_buff          **rx_skbuff;
        void                    *rx_buffers;
        size_t                  rx_buffer_size;

        unsigned int            num_queues;
        unsigned int            queue_mask;
        struct macb_queue       queues[MACB_MAX_QUEUES];

        spinlock_t              lock;
        struct platform_device  *pdev;
        struct clk              *pclk;
        struct clk              *hclk;
        struct clk              *tx_clk;
        struct net_device       *dev;
        struct napi_struct      napi;
        struct net_device_stats stats;
        union {
                struct macb_stats       macb;
                struct gem_stats        gem;
        }                       hw_stats;

        dma_addr_t              rx_ring_dma;
        dma_addr_t              rx_buffers_dma;

        struct macb_or_gem_ops  macbgem_ops;

        struct mii_bus          *mii_bus;
        struct phy_device       *phy_dev;
        unsigned int            link;
        unsigned int            speed;
        unsigned int            duplex;

        u32                     caps;
        unsigned int            dma_burst_length;

        phy_interface_t         phy_interface;

        /* AT91RM9200 transmit */
        struct sk_buff *skb;                    /* holds skb until xmit interrupt completes */
        dma_addr_t skb_physaddr;                /* phys addr from pci_map_single */
        int skb_length;                         /* saved skb length for pci_unmap_single */
        unsigned int            max_tx_length;

        u64                     ethtool_stats[GEM_STATS_LEN];
};

static inline bool macb_is_gem(struct macb *bp)
{
        return !!(bp->caps & MACB_CAPS_MACB_IS_GEM);
}

static inline bool macb_is_gem_hw(void __iomem *addr)
{
        return !!(MACB_BFEXT(IDNUM, readl_relaxed(addr + MACB_MID)) >= 0x2);
}

#endif /* _MACB_H */