/*
 * Copyright (c) 1995, David Greenman
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice unmodified, this list of conditions, and the following
 *    disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 *	$Id$
 */

#define FXP_VENDORID_INTEL	0x8086
#define FXP_DEVICEID_i82557	0x1229

#define FXP_PCI_MMBA	0x10
#define FXP_PCI_IOBA	0x14

struct fxp_csr {
	volatile u_int8_t	:2,
				scb_rus:4,
				scb_cus:2;
	volatile u_int8_t	scb_statack;
	volatile u_int8_t	scb_command;
	volatile u_int8_t	scb_intrcntl;
	volatile u_int32_t	scb_general;
	volatile u_int32_t	port;
	volatile u_int16_t	flash_control;
	volatile u_int16_t	eeprom_control;
	volatile u_int32_t	mdi_control;
};

#define FXP_PORT_SOFTWARE_RESET		0
#define FXP_PORT_SELFTEST		1
#define FXP_PORT_SELECTIVE_RESET	2
#define FXP_PORT_DUMP			3

#define FXP_SCB_RUS_IDLE		0
#define FXP_SCB_RUS_SUSPENDED		1
#define FXP_SCB_RUS_NORESOURCES		2
#define FXP_SCB_RUS_READY		4
#define FXP_SCB_RUS_SUSP_NORBDS		9
#define FXP_SCB_RUS_NORES_NORBDS	10
#define FXP_SCB_RUS_READY_NORBDS	12

#define FXP_SCB_CUS_IDLE		0
#define FXP_SCB_CUS_SUSPENDED		1
#define FXP_SCB_CUS_ACTIVE		2

#define FXP_SCB_STATACK_SWI		0x04
#define FXP_SCB_STATACK_MDI		0x08
#define FXP_SCB_STATACK_RNR		0x10
#define FXP_SCB_STATACK_CNA		0x20
#define FXP_SCB_STATACK_FR		0x40
#define FXP_SCB_STATACK_CXTNO		0x80

#define FXP_SCB_COMMAND_MASK		0xff
#define FXP_SCB_COMMAND_CU_NOP		0x00
#define FXP_SCB_COMMAND_CU_START	0x10
#define FXP_SCB_COMMAND_CU_RESUME	0x20
#define FXP_SCB_COMMAND_CU_DUMP_ADR	0x40
#define FXP_SCB_COMMAND_CU_DUMP		0x50
#define FXP_SCB_COMMAND_CU_BASE		0x60
#define FXP_SCB_COMMAND_CU_DUMPRESET	0x70

#define FXP_SCB_COMMAND_RU_NOP		0
#define FXP_SCB_COMMAND_RU_START	1
#define FXP_SCB_COMMAND_RU_RESUME	2
#define FXP_SCB_COMMAND_RU_ABORT	4
#define FXP_SCB_COMMAND_RU_LOADHDS	5
#define FXP_SCB_COMMAND_RU_BASE		6
#define FXP_SCB_COMMAND_RU_RBDRESUME	7

/*
 * Command block definitions
 */
struct fxp_cb_nop {
	volatile u_int16_t cb_status;
	volatile u_int16_t cb_command;
	volatile u_int32_t link_addr;
};
struct fxp_cb_ias {
	volatile u_int16_t cb_status;
	volatile u_int16_t cb_command;
	volatile u_int32_t link_addr;
	volatile u_int8_t macaddr[6];
};
/* I hate bit-fields :-( */
struct fxp_cb_config {
	volatile u_int16_t	cb_status;
	volatile u_int16_t	cb_command;
	volatile u_int32_t	link_addr;
	volatile u_int8_t	byte_count:6,
				:2;
	volatile u_int8_t	rx_fifo_limit:4,
				tx_fifo_limit:3,
				:1;
	volatile u_int8_t	adaptive_ifs;
	volatile u_int8_t	:8;
	volatile u_int8_t	rx_dma_bytecount:7,
				:1;
	volatile u_int8_t	tx_dma_bytecount:7,
				dma_bce:1;
	volatile u_int8_t	late_scb:1,
				:1,
				tno_int:1,
				ci_int:1,
				:3,
				save_bf:1;
	volatile u_int8_t	disc_short_rx:1,
				underrun_retry:2,
				:5;
	volatile u_int8_t	mediatype:1,
				:7;
	volatile u_int8_t	:8;
	volatile u_int8_t	:3,
				nsai:1,
				preamble_length:2,
				loopback:2;
	volatile u_int8_t	linear_priority:3,
				:5;
	volatile u_int8_t	linear_pri_mode:1,
				:3,
				interfrm_spacing:4;
	volatile u_int8_t	:8;
	volatile u_int8_t	:8;
	volatile u_int8_t	promiscuous:1,
				bcast_disable:1,
				:5,
				crscdt:1;
	volatile u_int8_t	:8;
	volatile u_int8_t	:8;
	volatile u_int8_t	stripping:1,
				padding:1,
				rcv_crc_xfer:1,
				:5;
	volatile u_int8_t	:6,
				force_fdx:1,
				fdx_pin_en:1;
	volatile u_int8_t	:6,
				multi_ia:1,
				:1;
	volatile u_int8_t	:3,
				mc_all:1,
				:4;
};
struct fxp_tbd {
	volatile u_int32_t tb_addr;
	volatile u_int32_t tb_size;
};

struct fxp_cb_tx {
	volatile u_int16_t cb_status;
	volatile u_int16_t cb_command;
	volatile u_int32_t link_addr;
	volatile u_int32_t tbd_array_addr;
	volatile u_int16_t byte_count;
	volatile u_int8_t tx_threshold;
	volatile u_int8_t tbd_number;
	/*
	 * The following isn't actually part of the TxCB.
	 */
	volatile struct fxp_tbd tbd[29];
	struct mbuf *mb_head;
	struct fxp_cb_tx *next;
};

/*
 * Control Block (CB) definitions
 */

/* status */
#define FXP_CB_STATUS_OK	0x2000
#define FXP_CB_STATUS_C		0x8000
/* commands */
#define FXP_CB_COMMAND_NOP	0x0
#define FXP_CB_COMMAND_IAS	0x1
#define FXP_CB_COMMAND_CONFIG	0x2
#define FXP_CB_COMMAND_MAS	0x3
#define FXP_CB_COMMAND_XMIT	0x4
#define FXP_CB_COMMAND_RESRV	0x5
#define FXP_CB_COMMAND_DUMP	0x6
#define FXP_CB_COMMAND_DIAG	0x7
/* command flags */
#define FXP_CB_COMMAND_SF	0x0008	/* simple/flexible mode */
#define FXP_CB_COMMAND_I	0x2000	/* generate interrupt on completion */
#define FXP_CB_COMMAND_S	0x4000	/* suspend on completion */
#define FXP_CB_COMMAND_EL	0x8000	/* end of list */

/*
 * RFA definitions
 */

struct fxp_rfa {
	volatile u_int16_t rfa_status;
	volatile u_int16_t rfa_control;
	volatile u_int32_t link_addr;
	volatile u_int32_t rbd_addr;
	volatile u_int16_t actual_size;
	volatile u_int16_t size;
};
#define FXP_RFA_STATUS_RCOL	0x0001	/* receive collision */
#define FXP_RFA_STATUS_IAMATCH	0x0002	/* 0 = matches station address */
#define FXP_RFA_STATUS_S4	0x0010	/* receive error from PHY */
#define FXP_RFA_STATUS_TL	0x0020	/* type/length */
#define FXP_RFA_STATUS_FTS	0x0080	/* frame too short */
#define FXP_RFA_STATUS_OVERRUN	0x0100	/* DMA overrun */
#define FXP_RFA_STATUS_RNR	0x0200	/* no resources */
#define FXP_RFA_STATUS_ALIGN	0x0400	/* alignment error */
#define FXP_RFA_STATUS_CRC	0x0800	/* CRC error */
#define FXP_RFA_STATUS_OK	0x2000	/* packet received okay */
#define FXP_RFA_STATUS_C	0x8000	/* packet reception complete */
#define FXP_RFA_CONTROL_SF	0x08	/* simple/flexible memory mode */
#define FXP_RFA_CONTROL_H	0x10	/* header RFD */
#define FXP_RFA_CONTROL_S	0x4000	/* suspend after reception */
#define FXP_RFA_CONTROL_EL	0x8000	/* end of list */

/*
 * Statistics dump area definitions
 */
struct fxp_stats {
	volatile u_int32_t tx_good;
	volatile u_int32_t tx_maxcols;
	volatile u_int32_t tx_latecols;
	volatile u_int32_t tx_underruns;
	volatile u_int32_t tx_lostcrs;
	volatile u_int32_t tx_deffered;
	volatile u_int32_t tx_single_collisions;
	volatile u_int32_t tx_multiple_collisions;
	volatile u_int32_t tx_total_collisions;
	volatile u_int32_t rx_good;
	volatile u_int32_t rx_crc_errors;
	volatile u_int32_t rx_alignment_errors;
	volatile u_int32_t rx_rnr_errors;
	volatile u_int32_t rx_overrun_errors;
	volatile u_int32_t rx_cdt_errors;
	volatile u_int32_t rx_shortframes;
	volatile u_int32_t completion_status;
};
#define FXP_STATS_DUMP_COMPLETE	0xa005
#define FXP_STATS_DR_COMPLETE	0xa007
	
/*
 * Serial EEPROM control register bits
 */
/* shift clock */
#define FXP_EEPROM_EESK		0x01
/* chip select */
#define FXP_EEPROM_EECS		0x02
/* data in */
#define FXP_EEPROM_EEDI		0x04
/* data out */
#define FXP_EEPROM_EEDO		0x08

/*
 * Serial EEPROM opcodes, including start bit
 */
#define FXP_EEPROM_OPC_ERASE	0x4
#define FXP_EEPROM_OPC_WRITE	0x5
#define FXP_EEPROM_OPC_READ	0x6