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+/*
+ * (C) Copyright 2000
+ * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that 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., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+/*
+ * Most of the following information was derived from the document
+ * "Information Technology - AT Attachment-3 Interface (ATA-3)"
+ * which can be found at:
+ * http://www.dt.wdc.com/ata/ata-3/ata3r5v.zip
+ * ftp://poctok.iae.nsk.su/pub/asm/Documents/IDE/ATA3R5V.ZIP
+ * ftp://ftp.fee.vutbr.cz/pub/doc/io/ata/ata-3/ata3r5v.zip
+ */
+
+#ifndef	_ATA_H
+#define _ATA_H
+
+/* Register addressing depends on the hardware design; for instance,
+ * 8-bit (register) and 16-bit (data) accesses might use different
+ * address spaces. This is implemented by the following definitions.
+ */
+
+#define ATA_IO_DATA(x)	(CFG_ATA_DATA_OFFSET+(x))
+#define ATA_IO_REG(x)	(CFG_ATA_REG_OFFSET +(x))
+#define ATA_IO_ALT(x)	(CFG_ATA_ALT_OFFSET +(x))
+
+/*
+ * I/O Register Descriptions
+ */
+#define ATA_DATA_REG	ATA_IO_DATA(0)
+#define ATA_ERROR_REG	ATA_IO_REG(1)
+#define ATA_SECT_CNT	ATA_IO_REG(2)
+#define ATA_SECT_NUM	ATA_IO_REG(3)
+#define ATA_CYL_LOW	ATA_IO_REG(4)
+#define ATA_CYL_HIGH	ATA_IO_REG(5)
+#define ATA_DEV_HD	ATA_IO_REG(6)
+#define ATA_COMMAND	ATA_IO_REG(7)
+#define ATA_STATUS	ATA_COMMAND
+#define ATA_DEV_CTL	ATA_IO_ALT(6)
+#define ATA_LBA_LOW	ATA_SECT_NUM
+#define ATA_LBA_MID	ATA_CYL_LOW
+#define ATA_LBA_HIGH	ATA_CYL_HIGH
+#define ATA_LBA_SEL	ATA_DEV_CTL
+
+/*
+ * Status register bits
+ */
+#define ATA_STAT_BUSY	0x80	/* Device Busy			*/
+#define ATA_STAT_READY	0x40	/* Device Ready			*/
+#define ATA_STAT_FAULT	0x20	/* Device Fault			*/
+#define ATA_STAT_SEEK	0x10	/* Device Seek Complete		*/
+#define ATA_STAT_DRQ	0x08	/* Data Request (ready)		*/
+#define ATA_STAT_CORR	0x04	/* Corrected Data Error		*/
+#define ATA_STAT_INDEX	0x02	/* Vendor specific		*/
+#define ATA_STAT_ERR	0x01	/* Error			*/
+
+/*
+ * Device / Head Register Bits
+ */
+#define ATA_DEVICE(x)	((x & 1)<<4)
+#define ATA_LBA		0xE0
+
+/*
+ * ATA Commands (only mandatory commands listed here)
+ */
+#define ATA_CMD_READ	0x20	/* Read Sectors (with retries)	*/
+#define ATA_CMD_READN	0x21	/* Read Sectors ( no  retries)	*/
+#define ATA_CMD_WRITE	0x30	/* Write Sectores (with retries)*/
+#define ATA_CMD_WRITEN	0x31	/* Write Sectors  ( no  retries)*/
+#define ATA_CMD_VRFY	0x40	/* Read Verify  (with retries)	*/
+#define ATA_CMD_VRFYN	0x41	/* Read verify  ( no  retries)	*/
+#define ATA_CMD_SEEK	0x70	/* Seek				*/
+#define ATA_CMD_DIAG	0x90	/* Execute Device Diagnostic	*/
+#define ATA_CMD_INIT	0x91	/* Initialize Device Parameters	*/
+#define ATA_CMD_RD_MULT	0xC4	/* Read Multiple		*/
+#define ATA_CMD_WR_MULT	0xC5	/* Write Multiple		*/
+#define ATA_CMD_SETMULT	0xC6	/* Set Multiple Mode		*/
+#define ATA_CMD_RD_DMA	0xC8	/* Read DMA (with retries)	*/
+#define ATA_CMD_RD_DMAN	0xC9	/* Read DMS ( no  retries)	*/
+#define ATA_CMD_WR_DMA	0xCA	/* Write DMA (with retries)	*/
+#define ATA_CMD_WR_DMAN	0xCB	/* Write DMA ( no  retires)	*/
+#define ATA_CMD_IDENT	0xEC	/* Identify Device		*/
+#define ATA_CMD_SETF	0xEF	/* Set Features			*/
+#define ATA_CMD_CHK_PWR	0xE5	/* Check Power Mode		*/
+
+/*
+ * ATAPI Commands
+ */
+#define ATAPI_CMD_IDENT 0xA1 /* Identify AT Atachment Packed Interface Device */
+#define ATAPI_CMD_PACKET 0xA0 /* Packed Command */
+
+
+#define ATAPI_CMD_INQUIRY 0x12
+#define ATAPI_CMD_REQ_SENSE 0x03
+#define ATAPI_CMD_READ_CAP 0x25
+#define ATAPI_CMD_START_STOP 0x1B
+#define ATAPI_CMD_READ_12 0xA8
+
+
+#define ATA_GET_ERR()	inb(ATA_STATUS)
+#define ATA_GET_STAT()	inb(ATA_STATUS)
+#define ATA_OK_STAT(stat,good,bad)	(((stat)&((good)|(bad)))==(good))
+#define ATA_BAD_R_STAT	(ATA_STAT_BUSY	| ATA_STAT_ERR)
+#define ATA_BAD_W_STAT	(ATA_BAD_R_STAT	| ATA_STAT_FAULT)
+#define ATA_BAD_STAT	(ATA_BAD_R_STAT	| ATA_STAT_DRQ)
+#define ATA_DRIVE_READY	(ATA_READY_STAT	| ATA_STAT_SEEK)
+#define ATA_DATA_READY	(ATA_STAT_DRQ)
+
+#define ATA_BLOCKSIZE	512	/* bytes */
+#define ATA_BLOCKSHIFT	9	/* 2 ^ ATA_BLOCKSIZESHIFT = 512 */
+#define ATA_SECTORWORDS	(512 / sizeof(unsigned long))
+
+#ifndef ATA_RESET_TIME
+#define ATA_RESET_TIME	60	/* spec allows up to 31 seconds */
+#endif
+
+/* ------------------------------------------------------------------------- */
+
+/*
+ * structure returned by ATA_CMD_IDENT, as per ANSI ATA2 rev.2f spec
+ */
+typedef struct hd_driveid {
+	unsigned short	config;		/* lots of obsolete bit flags */
+	unsigned short	cyls;		/* "physical" cyls */
+	unsigned short	reserved2;	/* reserved (word 2) */
+	unsigned short	heads;		/* "physical" heads */
+	unsigned short	track_bytes;	/* unformatted bytes per track */
+	unsigned short	sector_bytes;	/* unformatted bytes per sector */
+	unsigned short	sectors;	/* "physical" sectors per track */
+	unsigned short	vendor0;	/* vendor unique */
+	unsigned short	vendor1;	/* vendor unique */
+	unsigned short	vendor2;	/* vendor unique */
+	unsigned char	serial_no[20];	/* 0 = not_specified */
+	unsigned short	buf_type;
+	unsigned short	buf_size;	/* 512 byte increments; 0 = not_specified */
+	unsigned short	ecc_bytes;	/* for r/w long cmds; 0 = not_specified */
+	unsigned char	fw_rev[8];	/* 0 = not_specified */
+	unsigned char	model[40];	/* 0 = not_specified */
+	unsigned char	max_multsect;	/* 0=not_implemented */
+	unsigned char	vendor3;	/* vendor unique */
+	unsigned short	dword_io;	/* 0=not_implemented; 1=implemented */
+	unsigned char	vendor4;	/* vendor unique */
+	unsigned char	capability;	/* bits 0:DMA 1:LBA 2:IORDYsw 3:IORDYsup*/
+	unsigned short	reserved50;	/* reserved (word 50) */
+	unsigned char	vendor5;	/* vendor unique */
+	unsigned char	tPIO;		/* 0=slow, 1=medium, 2=fast */
+	unsigned char	vendor6;	/* vendor unique */
+	unsigned char	tDMA;		/* 0=slow, 1=medium, 2=fast */
+	unsigned short	field_valid;	/* bits 0:cur_ok 1:eide_ok */
+	unsigned short	cur_cyls;	/* logical cylinders */
+	unsigned short	cur_heads;	/* logical heads */
+	unsigned short	cur_sectors;	/* logical sectors per track */
+	unsigned short	cur_capacity0;	/* logical total sectors on drive */
+	unsigned short	cur_capacity1;	/*  (2 words, misaligned int)     */
+	unsigned char	multsect;	/* current multiple sector count */
+	unsigned char	multsect_valid;	/* when (bit0==1) multsect is ok */
+	unsigned int	lba_capacity;	/* total number of sectors */
+	unsigned short	dma_1word;	/* single-word dma info */
+	unsigned short	dma_mword;	/* multiple-word dma info */
+	unsigned short  eide_pio_modes; /* bits 0:mode3 1:mode4 */
+	unsigned short  eide_dma_min;	/* min mword dma cycle time (ns) */
+	unsigned short  eide_dma_time;	/* recommended mword dma cycle time (ns) */
+	unsigned short  eide_pio;       /* min cycle time (ns), no IORDY  */
+	unsigned short  eide_pio_iordy; /* min cycle time (ns), with IORDY */
+	unsigned short	words69_70[2];	/* reserved words 69-70 */
+	unsigned short	words71_74[4];	/* reserved words 71-74 */
+	unsigned short  queue_depth;	/*  */
+	unsigned short  words76_79[4];	/* reserved words 76-79 */
+	unsigned short  major_rev_num;	/*  */
+	unsigned short  minor_rev_num;	/*  */
+	unsigned short  command_set_1;	/* bits 0:Smart 1:Security 2:Removable 3:PM */
+	unsigned short  command_set_2;	/* bits 14:Smart Enabled 13:0 zero */
+	unsigned short  cfsse;		/* command set-feature supported extensions */
+	unsigned short  cfs_enable_1;	/* command set-feature enabled */
+	unsigned short  cfs_enable_2;	/* command set-feature enabled */
+	unsigned short  csf_default;	/* command set-feature default */
+	unsigned short  dma_ultra;	/*  */
+	unsigned short	word89;		/* reserved (word 89) */
+	unsigned short	word90;		/* reserved (word 90) */
+	unsigned short	CurAPMvalues;	/* current APM values */
+	unsigned short	word92;		/* reserved (word 92) */
+	unsigned short	hw_config;	/* hardware config */
+	unsigned short  words94_125[32];/* reserved words 94-125 */
+	unsigned short	last_lun;	/* reserved (word 126) */
+	unsigned short	word127;	/* reserved (word 127) */
+	unsigned short	dlf;		/* device lock function
+					 * 15:9	reserved
+					 * 8	security level 1:max 0:high
+					 * 7:6	reserved
+					 * 5	enhanced erase
+					 * 4	expire
+					 * 3	frozen
+					 * 2	locked
+					 * 1	en/disabled
+					 * 0	capability
+					 */
+	unsigned short  csfo;		/* current set features options
+					 * 15:4	reserved
+					 * 3	auto reassign
+					 * 2	reverting
+					 * 1	read-look-ahead
+					 * 0	write cache
+					 */
+	unsigned short	words130_155[26];/* reserved vendor words 130-155 */
+	unsigned short	word156;
+	unsigned short	words157_159[3];/* reserved vendor words 157-159 */
+	unsigned short	words160_255[95];/* reserved words 160-255 */
+} hd_driveid_t;
+
+
+/*
+ * PIO Mode Configuration
+ *
+ * See ATA-3 (AT Attachment-3 Interface) documentation, Figure 14 / Table 21
+ */
+
+typedef struct {
+	unsigned int	t_setup;	/* Setup  Time in [ns] or clocks	*/
+	unsigned int	t_length;	/* Length Time in [ns] or clocks	*/
+	unsigned int	t_hold;		/* Hold   Time in [ns] or clocks	*/
+}
+pio_config_t;
+
+#define	IDE_MAX_PIO_MODE	4	/* max suppurted PIO mode		*/
+
+/* ------------------------------------------------------------------------- */
+
+#endif /* _ATA_H */