1 files changed, 268 insertions, 0 deletions
diff --git a/include/linux/ata.h b/include/linux/ata.h
new file mode 100644
index 000000000000..f178894edd04
--- /dev/null
+++ b/include/linux/ata.h
@@ -0,0 +1,268 @@
+
+/*
+   Copyright 2003-2004 Red Hat, Inc.  All rights reserved.
+   Copyright 2003-2004 Jeff Garzik
+
+   The contents of this file are subject to the Open
+   Software License version 1.1 that can be found at
+   http://www.opensource.org/licenses/osl-1.1.txt and is included herein
+   by reference.
+
+   Alternatively, the contents of this file may be used under the terms
+   of the GNU General Public License version 2 (the "GPL") as distributed
+   in the kernel source COPYING file, in which case the provisions of
+   the GPL are applicable instead of the above.  If you wish to allow
+   the use of your version of this file only under the terms of the
+   GPL and not to allow others to use your version of this file under
+   the OSL, indicate your decision by deleting the provisions above and
+   replace them with the notice and other provisions required by the GPL.
+   If you do not delete the provisions above, a recipient may use your
+   version of this file under either the OSL or the GPL.
+
+ */
+
+#ifndef __LINUX_ATA_H__
+#define __LINUX_ATA_H__
+
+#include <linux/types.h>
+
+/* defines only for the constants which don't work well as enums */
+#define ATA_DMA_BOUNDARY	0xffffUL
+#define ATA_DMA_MASK		0xffffffffULL
+
+enum {
+	/* various global constants */
+	ATA_MAX_DEVICES		= 2,	/* per bus/port */
+	ATA_MAX_PRD		= 256,	/* we could make these 256/256 */
+	ATA_SECT_SIZE		= 512,
+
+	ATA_ID_WORDS		= 256,
+	ATA_ID_PROD_OFS		= 27,
+	ATA_ID_FW_REV_OFS	= 23,
+	ATA_ID_SERNO_OFS	= 10,
+	ATA_ID_MAJOR_VER	= 80,
+	ATA_ID_PIO_MODES	= 64,
+	ATA_ID_MWDMA_MODES	= 63,
+	ATA_ID_UDMA_MODES	= 88,
+	ATA_ID_PIO4		= (1 << 1),
+
+	ATA_PCI_CTL_OFS		= 2,
+	ATA_SERNO_LEN		= 20,
+	ATA_UDMA0		= (1 << 0),
+	ATA_UDMA1		= ATA_UDMA0 | (1 << 1),
+	ATA_UDMA2		= ATA_UDMA1 | (1 << 2),
+	ATA_UDMA3		= ATA_UDMA2 | (1 << 3),
+	ATA_UDMA4		= ATA_UDMA3 | (1 << 4),
+	ATA_UDMA5		= ATA_UDMA4 | (1 << 5),
+	ATA_UDMA6		= ATA_UDMA5 | (1 << 6),
+	ATA_UDMA7		= ATA_UDMA6 | (1 << 7),
+	/* ATA_UDMA7 is just for completeness... doesn't exist (yet?).  */
+
+	ATA_UDMA_MASK_40C	= ATA_UDMA2,	/* udma0-2 */
+
+	/* DMA-related */
+	ATA_PRD_SZ		= 8,
+	ATA_PRD_TBL_SZ		= (ATA_MAX_PRD * ATA_PRD_SZ),
+	ATA_PRD_EOT		= (1 << 31),	/* end-of-table flag */
+
+	ATA_DMA_TABLE_OFS	= 4,
+	ATA_DMA_STATUS		= 2,
+	ATA_DMA_CMD		= 0,
+	ATA_DMA_WR		= (1 << 3),
+	ATA_DMA_START		= (1 << 0),
+	ATA_DMA_INTR		= (1 << 2),
+	ATA_DMA_ERR		= (1 << 1),
+	ATA_DMA_ACTIVE		= (1 << 0),
+
+	/* bits in ATA command block registers */
+	ATA_HOB			= (1 << 7),	/* LBA48 selector */
+	ATA_NIEN		= (1 << 1),	/* disable-irq flag */
+	ATA_LBA			= (1 << 6),	/* LBA28 selector */
+	ATA_DEV1		= (1 << 4),	/* Select Device 1 (slave) */
+	ATA_DEVICE_OBS		= (1 << 7) | (1 << 5), /* obs bits in dev reg */
+	ATA_DEVCTL_OBS		= (1 << 3),	/* obsolete bit in devctl reg */
+	ATA_BUSY		= (1 << 7),	/* BSY status bit */
+	ATA_DRDY		= (1 << 6),	/* device ready */
+	ATA_DF			= (1 << 5),	/* device fault */
+	ATA_DRQ			= (1 << 3),	/* data request i/o */
+	ATA_ERR			= (1 << 0),	/* have an error */
+	ATA_SRST		= (1 << 2),	/* software reset */
+	ATA_ABORTED		= (1 << 2),	/* command aborted */
+
+	/* ATA command block registers */
+	ATA_REG_DATA		= 0x00,
+	ATA_REG_ERR		= 0x01,
+	ATA_REG_NSECT		= 0x02,
+	ATA_REG_LBAL		= 0x03,
+	ATA_REG_LBAM		= 0x04,
+	ATA_REG_LBAH		= 0x05,
+	ATA_REG_DEVICE		= 0x06,
+	ATA_REG_STATUS		= 0x07,
+
+	ATA_REG_FEATURE		= ATA_REG_ERR, /* and their aliases */
+	ATA_REG_CMD		= ATA_REG_STATUS,
+	ATA_REG_BYTEL		= ATA_REG_LBAM,
+	ATA_REG_BYTEH		= ATA_REG_LBAH,
+	ATA_REG_DEVSEL		= ATA_REG_DEVICE,
+	ATA_REG_IRQ		= ATA_REG_NSECT,
+
+	/* ATA device commands */
+	ATA_CMD_CHK_POWER	= 0xE5, /* check power mode */
+	ATA_CMD_EDD		= 0x90,	/* execute device diagnostic */
+	ATA_CMD_FLUSH		= 0xE7,
+	ATA_CMD_FLUSH_EXT	= 0xEA,
+	ATA_CMD_ID_ATA		= 0xEC,
+	ATA_CMD_ID_ATAPI	= 0xA1,
+	ATA_CMD_READ		= 0xC8,
+	ATA_CMD_READ_EXT	= 0x25,
+	ATA_CMD_WRITE		= 0xCA,
+	ATA_CMD_WRITE_EXT	= 0x35,
+	ATA_CMD_PIO_READ	= 0x20,
+	ATA_CMD_PIO_READ_EXT	= 0x24,
+	ATA_CMD_PIO_WRITE	= 0x30,
+	ATA_CMD_PIO_WRITE_EXT	= 0x34,
+	ATA_CMD_SET_FEATURES	= 0xEF,
+	ATA_CMD_PACKET		= 0xA0,
+	ATA_CMD_VERIFY		= 0x40,
+	ATA_CMD_VERIFY_EXT	= 0x42,
+
+	/* SETFEATURES stuff */
+	SETFEATURES_XFER	= 0x03,
+	XFER_UDMA_7		= 0x47,
+	XFER_UDMA_6		= 0x46,
+	XFER_UDMA_5		= 0x45,
+	XFER_UDMA_4		= 0x44,
+	XFER_UDMA_3		= 0x43,
+	XFER_UDMA_2		= 0x42,
+	XFER_UDMA_1		= 0x41,
+	XFER_UDMA_0		= 0x40,
+	XFER_MW_DMA_2		= 0x22,
+	XFER_MW_DMA_1		= 0x21,
+	XFER_MW_DMA_0		= 0x20,
+	XFER_PIO_4		= 0x0C,
+	XFER_PIO_3		= 0x0B,
+	XFER_PIO_2		= 0x0A,
+	XFER_PIO_1		= 0x09,
+	XFER_PIO_0		= 0x08,
+	XFER_SW_DMA_2		= 0x12,
+	XFER_SW_DMA_1		= 0x11,
+	XFER_SW_DMA_0		= 0x10,
+	XFER_PIO_SLOW		= 0x00,
+
+	/* ATAPI stuff */
+	ATAPI_PKT_DMA		= (1 << 0),
+	ATAPI_DMADIR		= (1 << 2),	/* ATAPI data dir:
+						   0=to device, 1=to host */
+	ATAPI_CDB_LEN		= 16,
+
+	/* cable types */
+	ATA_CBL_NONE		= 0,
+	ATA_CBL_PATA40		= 1,
+	ATA_CBL_PATA80		= 2,
+	ATA_CBL_PATA_UNK	= 3,
+	ATA_CBL_SATA		= 4,
+
+	/* SATA Status and Control Registers */
+	SCR_STATUS		= 0,
+	SCR_ERROR		= 1,
+	SCR_CONTROL		= 2,
+	SCR_ACTIVE		= 3,
+	SCR_NOTIFICATION	= 4,
+
+	/* struct ata_taskfile flags */
+	ATA_TFLAG_LBA48		= (1 << 0), /* enable 48-bit LBA and "HOB" */
+	ATA_TFLAG_ISADDR	= (1 << 1), /* enable r/w to nsect/lba regs */
+	ATA_TFLAG_DEVICE	= (1 << 2), /* enable r/w to device reg */
+	ATA_TFLAG_WRITE		= (1 << 3), /* data dir: host->dev==1 (write) */
+};
+
+enum ata_tf_protocols {
+	/* ATA taskfile protocols */
+	ATA_PROT_UNKNOWN,	/* unknown/invalid */
+	ATA_PROT_NODATA,	/* no data */
+	ATA_PROT_PIO,		/* PIO single sector */
+	ATA_PROT_PIO_MULT,	/* PIO multiple sector */
+	ATA_PROT_DMA,		/* DMA */
+	ATA_PROT_ATAPI,		/* packet command, PIO data xfer*/
+	ATA_PROT_ATAPI_NODATA,	/* packet command, no data */
+	ATA_PROT_ATAPI_DMA,	/* packet command with special DMA sauce */
+};
+
+enum ata_ioctls {
+	ATA_IOC_GET_IO32	= 0x309,
+	ATA_IOC_SET_IO32	= 0x324,
+};
+
+/* core structures */
+
+struct ata_prd {
+	u32			addr;
+	u32			flags_len;
+};
+
+struct ata_taskfile {
+	unsigned long		flags;		/* ATA_TFLAG_xxx */
+	u8			protocol;	/* ATA_PROT_xxx */
+
+	u8			ctl;		/* control reg */
+
+	u8			hob_feature;	/* additional data */
+	u8			hob_nsect;	/* to support LBA48 */
+	u8			hob_lbal;
+	u8			hob_lbam;
+	u8			hob_lbah;
+
+	u8			feature;
+	u8			nsect;
+	u8			lbal;
+	u8			lbam;
+	u8			lbah;
+
+	u8			device;
+
+	u8			command;	/* IO operation */
+};
+
+#define ata_id_is_ata(id)	(((id)[0] & (1 << 15)) == 0)
+#define ata_id_rahead_enabled(id) ((id)[85] & (1 << 6))
+#define ata_id_wcache_enabled(id) ((id)[85] & (1 << 5))
+#define ata_id_has_flush(id) ((id)[83] & (1 << 12))
+#define ata_id_has_flush_ext(id) ((id)[83] & (1 << 13))
+#define ata_id_has_lba48(id)	((id)[83] & (1 << 10))
+#define ata_id_has_wcache(id)	((id)[82] & (1 << 5))
+#define ata_id_has_pm(id)	((id)[82] & (1 << 3))
+#define ata_id_has_lba(id)	((id)[49] & (1 << 9))
+#define ata_id_has_dma(id)	((id)[49] & (1 << 8))
+#define ata_id_removeable(id)	((id)[0] & (1 << 7))
+#define ata_id_u32(id,n)	\
+	(((u32) (id)[(n) + 1] << 16) | ((u32) (id)[(n)]))
+#define ata_id_u64(id,n)	\
+	( ((u64) (id)[(n) + 3] << 48) |	\
+	  ((u64) (id)[(n) + 2] << 32) |	\
+	  ((u64) (id)[(n) + 1] << 16) |	\
+	  ((u64) (id)[(n) + 0]) )
+
+static inline int atapi_cdb_len(u16 *dev_id)
+{
+	u16 tmp = dev_id[0] & 0x3;
+	switch (tmp) {
+	case 0:		return 12;
+	case 1:		return 16;
+	default:	return -1;
+	}
+}
+
+static inline int is_atapi_taskfile(struct ata_taskfile *tf)
+{
+	return (tf->protocol == ATA_PROT_ATAPI) ||
+	       (tf->protocol == ATA_PROT_ATAPI_NODATA) ||
+	       (tf->protocol == ATA_PROT_ATAPI_DMA);
+}
+
+static inline int ata_ok(u8 status)
+{
+	return ((status & (ATA_BUSY | ATA_DRDY | ATA_DF | ATA_DRQ | ATA_ERR))
+			== ATA_DRDY);
+}
+
+#endif /* __LINUX_ATA_H__ */