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/*

 * advanced host controller interface (sata)

 * © 2007  coraid, inc

 */

/* ata errors */

enum {

	Emed	= 1<<0,		/* media error */

	Enm	= 1<<1,		/* no media */

	Eabrt	= 1<<2,		/* abort */

	Emcr	= 1<<3,		/* media change request */

	Eidnf	= 1<<4,		/* no user-accessible address */

	Emc	= 1<<5,		/* media change */

	Eunc	= 1<<6,		/* data error */

	Ewp	= 1<<6,		/* write protect */

	Eicrc	= 1<<7,		/* interface crc error */

	Efatal	= Eidnf|Eicrc,	/* must sw reset */

};

/* ata status */

enum {

	ASerr	= 1<<0,		/* error */

	ASdrq	= 1<<3,		/* request */

	ASdf	= 1<<5,		/* fault */

	ASdrdy	= 1<<6,		/* ready */

	ASbsy	= 1<<7,		/* busy */

	ASobs	= 1<<1|1<<2|1<<4,

};

/* pci configuration */

enum {

	Abar	= 5,

};

/*

 * ahci memory configuration

 *

 * 0000-0023	generic host control

 * 0024-009f	reserved

 * 00a0-00ff	vendor specific.

 * 0100-017f	port 0

 * ...

 * 1080-1100	port 31

 */

/* cap bits: supported features */

enum {

	Hs64a	= 1<<31,	/* 64-bit addressing */

	Hsncq	= 1<<30,	/* ncq */

	Hssntf	= 1<<29,	/* snotification reg. */

	Hsmps	= 1<<28,	/* mech pres switch */

	Hsss	= 1<<27,	/* staggered spinup */

	Hsalp	= 1<<26,	/* aggressive link pm */

	Hsal	= 1<<25,	/* activity led */

	Hsclo	= 1<<24,	/* command-list override */

	Hiss	= 1<<20,	/* for interface speed */

//	Hsnzo	= 1<<19,

	Hsam	= 1<<18,	/* ahci-mode only */

	Hspm	= 1<<17,	/* port multiplier */

//	Hfbss	= 1<<16,

	Hpmb	= 1<<15,	/* multiple-block pio */

	Hssc	= 1<<14,	/* slumber state */

	Hpsc	= 1<<13,	/* partial-slumber state */

	Hncs	= 1<<8,		/* n command slots */

	Hcccs	= 1<<7,		/* coal */

	Hems	= 1<<6,		/* enclosure mgmt. */

	Hsxs	= 1<<5,		/* external sata */

	Hnp	= 1<<0,		/* n ports */

};

/* ghc bits */

enum {

	Hae	= 1<<31,	/* enable ahci */

	Hie	= 1<<1,		/* " interrupts */

	Hhr	= 1<<0,		/* hba reset */

};

typedef struct {

	ulong	cap;

	ulong	ghc;

	ulong	isr;

	ulong	pi;		/* ports implemented */

	ulong	ver;

	ulong	ccc;		/* coaleasing control */

	ulong	cccports;

	ulong	emloc;

	ulong	emctl;

} Ahba;

enum {

	Acpds	= 1<<31,	/* cold port detect status */

	Atfes	= 1<<30,	/* task file error status */

	Ahbfs	= 1<<29,	/* hba fatal */

	Ahbds	= 1<<28,	/* hba error (parity error) */

	Aifs	= 1<<27,	/* interface fatal  §6.1.2 */

	Ainfs	= 1<<26,	/* interface error (recovered) */

	Aofs	= 1<<24,	/* too many bytes from disk */

	Aipms	= 1<<23,	/* incorrect prt mul status */

	Aprcs	= 1<<22,	/* PhyRdy change status Pxserr.diag.n */

	Adpms	= 1<<7,		/* mechanical presence status */

	Apcs 	= 1<<6,		/* port connect  diag.x */

	Adps 	= 1<<5,		/* descriptor processed */

	Aufs 	= 1<<4,		/* unknown fis diag.f */

	Asdbs	= 1<<3,		/* set device bits fis received w/ i bit set */

	Adss	= 1<<2,		/* dma setup */

	Apio	= 1<<1,		/* pio setup fis */

	Adhrs	= 1<<0,		/* device to host register fis */

	IEM	= Acpds|Atfes|Ahbds|Ahbfs|Ahbds|Aifs|Ainfs|Aprcs|Apcs|Adps|

			Aufs|Asdbs|Adss|Adhrs,

	Ifatal	= Atfes|Ahbfs|Ahbds|Aifs,

};

/* serror bits */

enum {

	SerrX	= 1<<26,	/* exchanged */

	SerrF	= 1<<25,	/* unknown fis */

	SerrT	= 1<<24,	/* transition error */

	SerrS	= 1<<23,	/* link sequence */

	SerrH	= 1<<22,	/* handshake */

	SerrC	= 1<<21,	/* crc */

	SerrD	= 1<<20,	/* not used by ahci */

	SerrB	= 1<<19,	/* 10-tp-8 decode */

	SerrW	= 1<<18,	/* comm wake */

	SerrI	= 1<<17,	/* phy internal */

	SerrN	= 1<<16,	/* phyrdy change */

	ErrE	= 1<<11,	/* internal */

	ErrP	= 1<<10,	/* ata protocol violation */

	ErrC	= 1<<9,		/* communication */

	ErrT	= 1<<8,		/* transient */

	ErrM	= 1<<1,		/* recoverd comm */

	ErrI	= 1<<0,		/* recovered data integrety */

	ErrAll	= ErrE|ErrP|ErrC|ErrT|ErrM|ErrI,

	SerrAll	= SerrX|SerrF|SerrT|SerrS|SerrH|SerrC|SerrD|SerrB|SerrW|

			SerrI|SerrN|ErrAll,

	SerrBad	= 0x7f<<19,

};

/* cmd register bits */

enum {

	Aicc	= 1<<28,	/* interface communcations control. 4 bits */

	Aasp	= 1<<27,	/* aggressive slumber & partial sleep */

	Aalpe 	= 1<<26,	/* aggressive link pm enable */

	Adlae	= 1<<25,	/* drive led on atapi */

	Aatapi	= 1<<24,	/* device is atapi */

	Aesp	= 1<<21,	/* external sata port */

	Acpd	= 1<<20,	/* cold presence detect */

	Ampsp	= 1<<19,	/* mechanical pres. */

	Ahpcp	= 1<<18,	/* hot plug capable */

	Apma	= 1<<17,	/* pm attached */

	Acps	= 1<<16,	/* cold presence state */

	Acr	= 1<<15,	/* cmdlist running */

	Afr	= 1<<14,	/* fis running */

	Ampss	= 1<<13,	/* mechanical presence switch state */

	Accs	= 1<<8,		/* current command slot 12:08 */

	Afre	= 1<<4,		/* fis enable receive */

	Aclo	= 1<<3,		/* command list override */

	Apod	= 1<<2,		/* power on dev (requires cold-pres. detect) */

	Asud	= 1<<1,		/* spin-up device;  requires ss capability */

	Ast	= 1<<0,		/* start */

	Arun	= Ast|Acr|Afre|Afr,

};

/* ctl register bits */

enum {

	Aipm	= 1<<8,		/* interface power mgmt. 3=off */

	Aspd	= 1<<4,

	Adet	= 1<<0,		/* device detection */

};

#define	sstatus	scr0

#define	sctl	scr2

#define	serror	scr1

#define	sactive	scr3

typedef struct {

	ulong	list;		/* PxCLB must be 1kb aligned. */

	ulong	listhi;

	ulong	fis;		/* 256-byte aligned */

	ulong	fishi;

	ulong	isr;

	ulong	ie;		/* interrupt enable */

	ulong	cmd;

	ulong	res1;

	ulong	task;

	ulong	sig;

	ulong	scr0;

	ulong	scr2;

	ulong	scr1;

	ulong	scr3;

	ulong	ci;		/* command issue */

	ulong	ntf;

	uchar	res2[8];

	ulong	vendor;

} Aport;

enum {

	/*

	 * Aport sstatus bits (actually states):

	 * 11-8 interface power management

	 *  7-4 current interface speed (generation #)

	 *  3-0 device detection

	 */

	Intslumber	= 0x600,

	Intpartpwr	= 0x200,

	Intactive	= 0x100,

	Intpm		= 0xf00,

	Devphyoffline	= 4,

	Devphycomm	= 2,		/* phy communication established */

	Devpresent	= 1,

	Devdet		= Devpresent | Devphycomm | Devphyoffline,

};

/* in host's memory; not memory mapped */

typedef struct {

	uchar	*base;

	uchar	*d;

	uchar	*p;

	uchar	*r;

	uchar	*u;

	ulong	*devicebits;

} Afis;

enum {

	Lprdtl	= 1<<16,	/* physical region descriptor table len */

	Lpmp	= 1<<12,	/* port multiplier port */

	Lclear	= 1<<10,	/* clear busy on R_OK */

	Lbist	= 1<<9,

	Lreset	= 1<<8,

	Lpref	= 1<<7,		/* prefetchable */

	Lwrite	= 1<<6,

	Latapi	= 1<<5,

	Lcfl	= 1<<0,		/* command fis length in double words */

};

/* in hosts memory; memory mapped */

typedef struct {

	ulong	flags;

	ulong	len;

	ulong	ctab;

	ulong	ctabhi;

	uchar	reserved[16];

} Alist;

typedef struct {

	ulong	dba;

	ulong	dbahi;

	ulong	pad;

	ulong	count;

} Aprdt;

typedef struct {

	uchar	cfis[0x40];

	uchar	atapi[0x10];

	uchar	pad[0x30];

	Aprdt	prdt;

} Actab;

enum {

	Ferror	= 1,

	Fdone	= 2,

};

enum {

	Dllba 	= 1,

	Dsmart	= 1<<1,

	Dpower	= 1<<2,

	Dnop	= 1<<3,

	Datapi	= 1<<4,

	Datapi16= 1<<5,

};

typedef struct {

	QLock;

	Rendez;

	uchar	flag;

	uchar	feat;

	uchar	smart;

	Afis	fis;

	Alist	*list;

	Actab	*ctab;

} Aportm;

typedef struct {

	Aport	*p;

	Aportm	*pm;

} Aportc;