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								/* 
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								 *  Parallel SCSI (SPI) transport specific attributes exported to sysfs.
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								 *
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								 *  Copyright (c) 2003 Silicon Graphics, Inc.  All rights reserved.
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								 *
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								 *  This program is free software; you can redistribute it and/or modify
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								 *  it under the terms of the GNU General Public License as published by
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								 *  the Free Software Foundation; either version 2 of the License, or
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								 *  (at your option) any later version.
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								 *
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								 *  This program is distributed in the hope that it will be useful,
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								 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
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								 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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								 *  GNU General Public License for more details.
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								 *
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								 *  You should have received a copy of the GNU General Public License
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								 *  along with this program; if not, write to the Free Software
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								 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
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								 */
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								#ifndef SCSI_TRANSPORT_SPI_H
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								#define SCSI_TRANSPORT_SPI_H
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								#include <linux/transport_class.h>
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								#include <linux/mutex.h>
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								struct scsi_transport_template;
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								struct scsi_target;
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								struct scsi_device;
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								struct Scsi_Host;
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								struct spi_transport_attrs {
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									int period;		/* value in the PPR/SDTR command */
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									int min_period;
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									int offset;
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									int max_offset;
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									unsigned int width:1;	/* 0 - narrow, 1 - wide */
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									unsigned int max_width:1;
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									unsigned int iu:1;	/* Information Units enabled */
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									unsigned int max_iu:1;
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									unsigned int dt:1;	/* DT clocking enabled */
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									unsigned int qas:1;	/* Quick Arbitration and Selection enabled */
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									unsigned int max_qas:1;
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									unsigned int wr_flow:1;	/* Write Flow control enabled */
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									unsigned int rd_strm:1;	/* Read streaming enabled */
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									unsigned int rti:1;	/* Retain Training Information */
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									unsigned int pcomp_en:1;/* Precompensation enabled */
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									unsigned int hold_mcs:1;/* Hold Margin Control Settings */
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									unsigned int initial_dv:1; /* DV done to this target yet  */
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									unsigned long flags;	/* flags field for drivers to use */
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									/* Device Properties fields */
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									unsigned int support_sync:1; /* synchronous support */
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									unsigned int support_wide:1; /* wide support */
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									unsigned int support_dt:1; /* allows DT phases */
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									unsigned int support_dt_only; /* disallows ST phases */
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									unsigned int support_ius; /* support Information Units */
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									unsigned int support_qas; /* supports quick arbitration and selection */
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									/* Private Fields */
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									unsigned int dv_pending:1; /* Internal flag: DV Requested */
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									unsigned int dv_in_progress:1;	/* Internal: DV started */
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									struct mutex dv_mutex; /* semaphore to serialise dv */
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								};
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								enum spi_signal_type {
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									SPI_SIGNAL_UNKNOWN = 1,
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									SPI_SIGNAL_SE,
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									SPI_SIGNAL_LVD,
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									SPI_SIGNAL_HVD,
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								};
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								struct spi_host_attrs {
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									enum spi_signal_type signalling;
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								};
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								/* accessor functions */
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								#define spi_period(x)	(((struct spi_transport_attrs *)&(x)->starget_data)->period)
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								#define spi_min_period(x) (((struct spi_transport_attrs *)&(x)->starget_data)->min_period)
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								#define spi_offset(x)	(((struct spi_transport_attrs *)&(x)->starget_data)->offset)
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								#define spi_max_offset(x) (((struct spi_transport_attrs *)&(x)->starget_data)->max_offset)
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								#define spi_width(x)	(((struct spi_transport_attrs *)&(x)->starget_data)->width)
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								#define spi_max_width(x) (((struct spi_transport_attrs *)&(x)->starget_data)->max_width)
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								#define spi_iu(x)	(((struct spi_transport_attrs *)&(x)->starget_data)->iu)
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								#define spi_max_iu(x)	(((struct spi_transport_attrs *)&(x)->starget_data)->max_iu)
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								#define spi_dt(x)	(((struct spi_transport_attrs *)&(x)->starget_data)->dt)
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								#define spi_qas(x)	(((struct spi_transport_attrs *)&(x)->starget_data)->qas)
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								#define spi_max_qas(x)	(((struct spi_transport_attrs *)&(x)->starget_data)->max_qas)
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								#define spi_wr_flow(x)	(((struct spi_transport_attrs *)&(x)->starget_data)->wr_flow)
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								#define spi_rd_strm(x)	(((struct spi_transport_attrs *)&(x)->starget_data)->rd_strm)
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								#define spi_rti(x)	(((struct spi_transport_attrs *)&(x)->starget_data)->rti)
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								#define spi_pcomp_en(x)	(((struct spi_transport_attrs *)&(x)->starget_data)->pcomp_en)
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								#define spi_hold_mcs(x)	(((struct spi_transport_attrs *)&(x)->starget_data)->hold_mcs)
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								#define spi_initial_dv(x)	(((struct spi_transport_attrs *)&(x)->starget_data)->initial_dv)
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								#define spi_dv_pending(x) (((struct spi_transport_attrs *)&(x)->starget_data)->dv_pending)
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								#define spi_support_sync(x)	(((struct spi_transport_attrs *)&(x)->starget_data)->support_sync)
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								#define spi_support_wide(x)	(((struct spi_transport_attrs *)&(x)->starget_data)->support_wide)
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								#define spi_support_dt(x)	(((struct spi_transport_attrs *)&(x)->starget_data)->support_dt)
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								#define spi_support_dt_only(x)	(((struct spi_transport_attrs *)&(x)->starget_data)->support_dt_only)
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								#define spi_support_ius(x)	(((struct spi_transport_attrs *)&(x)->starget_data)->support_ius)
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								#define spi_support_qas(x)	(((struct spi_transport_attrs *)&(x)->starget_data)->support_qas)
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								#define spi_flags(x)	(((struct spi_transport_attrs *)&(x)->starget_data)->flags)
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								#define spi_signalling(h)	(((struct spi_host_attrs *)(h)->shost_data)->signalling)
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								/* The functions by which the transport class and the driver communicate */
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								struct spi_function_template {
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									void	(*get_period)(struct scsi_target *);
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									void	(*set_period)(struct scsi_target *, int);
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									void	(*get_offset)(struct scsi_target *);
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									void	(*set_offset)(struct scsi_target *, int);
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									void	(*get_width)(struct scsi_target *);
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									void	(*set_width)(struct scsi_target *, int);
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									void	(*get_iu)(struct scsi_target *);
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									void	(*set_iu)(struct scsi_target *, int);
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									void	(*get_dt)(struct scsi_target *);
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									void	(*set_dt)(struct scsi_target *, int);
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									void	(*get_qas)(struct scsi_target *);
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									void	(*set_qas)(struct scsi_target *, int);
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									void	(*get_wr_flow)(struct scsi_target *);
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									void	(*set_wr_flow)(struct scsi_target *, int);
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									void	(*get_rd_strm)(struct scsi_target *);
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									void	(*set_rd_strm)(struct scsi_target *, int);
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									void	(*get_rti)(struct scsi_target *);
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									void	(*set_rti)(struct scsi_target *, int);
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									void	(*get_pcomp_en)(struct scsi_target *);
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									void	(*set_pcomp_en)(struct scsi_target *, int);
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									void	(*get_hold_mcs)(struct scsi_target *);
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									void	(*set_hold_mcs)(struct scsi_target *, int);
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									void	(*get_signalling)(struct Scsi_Host *);
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									void	(*set_signalling)(struct Scsi_Host *, enum spi_signal_type);
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									int	(*deny_binding)(struct scsi_target *);
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									/* The driver sets these to tell the transport class it
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									 * wants the attributes displayed in sysfs.  If the show_ flag
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									 * is not set, the attribute will be private to the transport
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									 * class */
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									unsigned long	show_period:1;
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									unsigned long	show_offset:1;
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									unsigned long	show_width:1;
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									unsigned long	show_iu:1;
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									unsigned long	show_dt:1;
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									unsigned long	show_qas:1;
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									unsigned long	show_wr_flow:1;
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									unsigned long	show_rd_strm:1;
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									unsigned long	show_rti:1;
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									unsigned long	show_pcomp_en:1;
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									unsigned long	show_hold_mcs:1;
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								};
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								struct scsi_transport_template *spi_attach_transport(struct spi_function_template *);
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								void spi_release_transport(struct scsi_transport_template *);
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								void spi_schedule_dv_device(struct scsi_device *);
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								void spi_dv_device(struct scsi_device *);
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								void spi_display_xfer_agreement(struct scsi_target *);
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								int spi_print_msg(const unsigned char *);
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								int spi_populate_width_msg(unsigned char *msg, int width);
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								int spi_populate_sync_msg(unsigned char *msg, int period, int offset);
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								int spi_populate_ppr_msg(unsigned char *msg, int period, int offset, int width,
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										int options);
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								#endif /* SCSI_TRANSPORT_SPI_H */
							 |