/*-
 * Copyright (c) 1998,1999 Søren Schmidt
 * 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, this list of conditions and the following disclaimer,
 *    without modification, immediately at the beginning of the file.
 * 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.
 * 3. The name of the author may not be used to endorse or promote products
 *    derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 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.
 *
 * $FreeBSD$
 */

/* ATAPI misc defines */
#define ATAPI_MAGIC_LSB			0x14
#define ATAPI_MAGIC_MSB			0xeb
#define ATAPI_P_READ			(ATA_S_DRQ | ATA_I_IN)
#define ATAPI_P_WRITE			(ATA_S_DRQ)
#define ATAPI_P_CMDOUT			(ATA_S_DRQ | ATA_I_CMD)
#define ATAPI_P_DONEDRQ			(ATA_S_DRQ | ATA_I_CMD | ATA_I_IN)
#define ATAPI_P_DONE			(ATA_I_CMD | ATA_I_IN)
#define ATAPI_P_ABORT			0

/* error register bits */
#define ATAPI_E_MASK			0x0f	/* error mask */
#define ATAPI_E_ILI			0x01	/* illegal length indication */
#define ATAPI_E_EOM			0x02	/* end of media detected */
#define ATAPI_E_ABRT			0x04	/* command aborted */
#define ATAPI_E_MCR			0x08	/* media change requested */
#define ATAPI_SK_MASK			0xf0	/* sense key mask */
#define ATAPI_SK_NO_SENSE		0x00	/* no specific sense key info */
#define ATAPI_SK_RECOVERED_ERROR	0x10	/* command OK, data recovered */
#define ATAPI_SK_NOT_READY		0x20	/* no access to drive */
#define ATAPI_SK_MEDIUM_ERROR		0x30	/* non-recovered data error */
#define ATAPI_SK_HARDWARE_ERROR		0x40	/* non-recoverable HW failure */
#define ATAPI_SK_ILLEGAL_REQUEST	0x50	/* invalid command param(s) */
#define ATAPI_SK_UNIT_ATTENTION		0x60	/* media changed */
#define ATAPI_SK_DATA_PROTECT		0x70	/* write protect */
#define ATAPI_SK_BLANK_CHECK		0x80	/* blank check */
#define ATAPI_SK_VENDOR_SPECIFIC	0x90	/* vendor specific skey */
#define ATAPI_SK_COPY_ABORTED		0xa0	/* copy aborted */
#define ATAPI_SK_ABORTED_COMMAND	0xb0	/* command aborted, try again */
#define ATAPI_SK_EQUAL			0xc0	/* equal */
#define ATAPI_SK_VOLUME_OVERFLOW	0xd0	/* volume overflow */
#define ATAPI_SK_MISCOMPARE		0xe0	/* data dont match the medium */
#define ATAPI_SK_RESERVED		0xf0

/* ATAPI commands */
#define ATAPI_TEST_UNIT_READY		0x00	/* check if device is ready */
#define ATAPI_REWIND			0x01	/* rewind */
#define ATAPI_REQUEST_SENSE		0x03	/* get sense data */
#define ATAPI_READ			0x08	/* read data */
#define ATAPI_WRITE			0x0a	/* write data */
#define ATAPI_WEOF			0x10	/* write filemark */
#define	    WF_WRITE				0x01
#define ATAPI_SPACE			0x11	/* space command */
#define	    SP_FM				0x01
#define	    SP_EOD				0x03
#define ATAPI_MODE_SELECT		0x15	/* mode select */
#define ATAPI_ERASE			0x19	/* erase */
#define ATAPI_MODE_SENSE		0x1a	/* mode sense */
#define ATAPI_START_STOP		0x1b	/* start/stop unit */
#define	    SS_LOAD				0x01
#define	    SS_RETENSION			0x02
#define	    SS_EJECT				0x04
#define ATAPI_PREVENT_ALLOW		0x1e	/* media removal */
#define ATAPI_READ_CAPACITY		0x25	/* get volume capacity */
#define ATAPI_READ_BIG			0x28	/* read data */
#define ATAPI_WRITE_BIG			0x2a	/* write data */
#define ATAPI_LOCATE			0x2b	/* locate to position */
#define ATAPI_READ_POSITION		0x34	/* read position */
#define ATAPI_SYNCHRONIZE_CACHE		0x35	/* flush buf, close channel */
#define ATAPI_WRITE_BUFFER		0x3b	/* write device buffer */
#define ATAPI_READ_BUFFER		0x3c	/* read device buffer */
#define ATAPI_READ_SUBCHANNEL		0x42	/* get subchannel info */
#define ATAPI_READ_TOC			0x43	/* get table of contents */
#define ATAPI_PLAY_MSF			0x47	/* play by MSF address */
#define ATAPI_PLAY_TRACK		0x48	/* play by track number */
#define ATAPI_PAUSE			0x4b	/* pause audio operation */
#define ATAPI_READ_TRACK_INFO		0x52	/* get track info structure */
#define ATAPI_MODE_SELECT_BIG		0x55	/* set device parameters */
#define ATAPI_MODE_SENSE_BIG		0x5a	/* get device parameters */
#define ATAPI_CLOSE_TRACK		0x5b	/* close track/session */
#define ATAPI_BLANK			0xa1	/* blank the media */
#define ATAPI_PLAY_BIG			0xa5	/* play by lba */
#define ATAPI_LOAD_UNLOAD		0xa6	/* changer control command */
#define ATAPI_PLAY_CD			0xb4	/* universal play command */
#define ATAPI_SET_SPEED			0xbb	/* set drive speed */
#define ATAPI_MECH_STATUS		0xbd	/* get changer status */
#define ATAPI_READ_CD			0xbe	/* read data */

/* ATAPI device parameter information */
struct atapi_params {
    u_int8_t	cmdsize		:2;		/* packet command size */
#define		ATAPI_PSIZE_12		0	/* 12 bytes */
#define		ATAPI_PSIZE_16		1	/* 16 bytes */

    u_int8_t			:3;
    u_int8_t	drqtype		:2;		/* DRQ type */
#define		ATAPI_DRQT_MPROC	0	/* cpu	  3 ms delay */
#define		ATAPI_DRQT_INTR		1	/* intr	 10 ms delay */
#define		ATAPI_DRQT_ACCEL	2	/* accel 50 us delay */

    u_int8_t	removable	:1;		/* device is removable */
    u_int8_t	device_type	:5;		/* device type */
#define		ATAPI_TYPE_DIRECT	0	/* disk/floppy */
#define		ATAPI_TYPE_TAPE		1	/* streaming tape */
#define		ATAPI_TYPE_CDROM	5	/* CD-ROM device */
#define		ATAPI_TYPE_OPTICAL	7	/* optical disk */

    u_int8_t			:1;
    u_int8_t	proto		:2;		/* command protocol */
#define		ATAPI_PROTO_ATAPI	2

    int16_t	reserved1;
    int16_t	reserved2;
    int16_t	reserved3;
    int16_t	reserved4;
    int16_t	reserved5;
    int16_t	reserved6;
    int16_t	reserved7;
    int16_t	reserved8;
    int16_t	reserved9;
    int8_t	serial[20];			/* serial number */
    int16_t	reserved20;
    int16_t	reserved21;
    int16_t	reserved22;
    int8_t	revision[8];			/* firmware revision */
    int8_t	model[40];			/* model name */
    int16_t	reserved47;
    int16_t	reserved48;

    u_int8_t	vendorcap;			/* vendor capabilities */
    u_int8_t	dmaflag		:1;		/* DMA supported */
    u_int8_t	lbaflag		:1;		/* LBA supported - always 1 */
    u_int8_t	iordydis	:1;		/* IORDY can be disabled */
    u_int8_t	iordyflag	:1;		/* IORDY supported */
    u_int8_t			:1;
    u_int8_t	ovlapflag	:1;		/* overlap supported */
    u_int8_t			:1;
    u_int8_t	idmaflag	:1;		/* interleaved DMA supported */
    int16_t	capvalidate;			/* validation for above */

    u_int16_t	piotiming;			/* PIO cycle timing */
    u_int16_t	dmatiming;			/* DMA cycle timing */

    u_int16_t	atavalid;			/* fields valid */
#define		ATAPI_FLAG_54_58	1	/* words 54-58 valid */
#define		ATAPI_FLAG_64_70	2	/* words 64-70 valid */

    int16_t	reserved54[8];

    int16_t	sdmamodes;			/* singleword DMA modes */
    int16_t	wdmamodes;			/* multiword DMA modes */
    int16_t	apiomodes;			/* advanced PIO modes */ 

    u_int16_t	mwdmamin;			/* min. M/W DMA time/word ns */
    u_int16_t	mwdmarec;			/* rec. M/W DMA time ns */
    u_int16_t	pioblind;			/* min. PIO cycle w/o flow */
    u_int16_t	pioiordy;			/* min. PIO cycle IORDY flow */

    int16_t	reserved69;
    int16_t	reserved70;
    u_int16_t	rlsovlap;			/* rel time (us) for overlap */
    u_int16_t	rlsservice;			/* rel time (us) for service */
    int16_t	reserved73;
    int16_t	reserved74;
    int16_t	queuelen;
    int16_t	reserved76;
    int16_t	reserved77;
    int16_t	reserved78;
    int16_t	reserved79;
    int16_t	versmajor;
    int16_t	versminor;
    int16_t	featsupp1;
    int16_t	featsupp2;
    int16_t	featsupp3;
    int16_t	featenab1;
    int16_t	featenab2;
    int16_t	featenab3;
    int16_t	udmamodes;			/* UltraDMA modes */
    int16_t	erasetime;
    int16_t	enherasetime;
    int16_t	apmlevel;
    int16_t	reserved92[34];
    int16_t	rmvcap;
    int16_t	securelevel;
};

/* ATAPI request sense structure */   
struct atapi_reqsense {
    u_int8_t	error_code	:7;		/* current or deferred errors */
    u_int8_t	valid		:1;		/* follows ATAPI spec */
    u_int8_t	segment;			/* Segment number */
    u_int8_t	sense_key	:4;		/* sense key */
    u_int8_t	reserved2_4	:1;		/* reserved */
    u_int8_t	ili		:1;		/* incorrect length indicator */
    u_int8_t	eom		:1;		/* end of medium */
    u_int8_t	filemark	:1;		/* filemark */
						/* cmd information */
    u_int32_t	cmd_info __attribute__((packed));
    u_int8_t	sense_length;			/* additional sense len (n-7) */
						/* additional cmd spec info */
    u_int32_t	cmd_specific_info __attribute__((packed));
    u_int8_t	asc;				/* additional sense code */
    u_int8_t	ascq;				/* additional sense code qual */
    u_int8_t	replaceable_unit_code;		/* replaceable unit code */
    u_int8_t	sk_specific1	:7;		/* sense key specific */
    u_int8_t	sksv		:1;		/* sense key specific info OK */
    u_int8_t	sk_specific2;			/* sense key specific */
    u_int8_t	sk_specific3;			/* sense key specific */
};  

struct atapi_softc {
    struct ata_softc		*controller;	/* ptr to parent ctrl */
    struct atapi_params		*atapi_parm;	/* ata device params */
    int32_t			unit;		/* ATA_MASTER or ATA_SLAVE */
    int8_t			cmd;		/* last cmd executed */
    u_int32_t			flags;		/* drive flags */
#define		ATAPI_F_DMA_ENABLED	0x0001
#define		ATAPI_F_DMA_USED	0x0002
#define		ATAPI_F_DSC_USED	0x0004
#define		ATAPI_F_MEDIA_CHANGED	0x0008

};

typedef int32_t atapi_callback_t(struct atapi_request *);

struct atapi_request {
    struct atapi_softc		*device;	/* ptr to parent device */
    void			*driver;	/* ptr to calling driver */
    u_int8_t			ccb[16];	/* command control block */
    int32_t			ccbsize;	/* size of ccb (12 | 16) */
    u_int32_t			bytecount;	/* bytes to transfer */
    int32_t			timeout;	/* timeout for this cmd */
    struct callout_handle	timeout_handle; /* handle for untimeout */
    int32_t			retries;	/* retry count */
    int32_t			result;		/* result of this cmd */
    struct atapi_reqsense	sense;		/* sense data if error */
    int32_t			flags;		
#define		A_READ			0x0001

    int8_t			*data;		/* pointer to data buf */
    struct buf			*bp;		/* associated buf ptr */
    atapi_callback_t		*callback;	/* ptr to callback func */
    TAILQ_ENTRY(atapi_request)	chain;		/* list management */
};

void atapi_transfer(struct atapi_request *);
int32_t atapi_interrupt(struct atapi_request *);
int32_t atapi_queue_cmd(struct atapi_softc *, int8_t [], void *, int32_t, int32_t, int32_t,  atapi_callback_t, void *, struct buf *);
void atapi_reinit(struct atapi_softc *);
int32_t atapi_test_ready(struct atapi_softc *);
int32_t atapi_wait_ready(struct atapi_softc *, int32_t);
void atapi_request_sense(struct atapi_softc *, struct atapi_reqsense *);
void atapi_dump(int8_t *, void *, int32_t);