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/*
* Parallel SCSI ( SPI ) transport specific attributes exported to sysfs .
*
* Copyright ( c ) 2003 Silicon Graphics , Inc . All rights reserved .
*
* 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
*/
# ifndef SCSI_TRANSPORT_SPI_H
# define SCSI_TRANSPORT_SPI_H
# 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 ;
struct scsi_device ;
struct Scsi_Host ;
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struct spi_transport_attrs {
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 */
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 */
unsigned int rd_strm : 1 ; /* Read streaming enabled */
unsigned int rti : 1 ; /* Retain Training Information */
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 */
unsigned long flags ; /* flags field for drivers to use */
/* Device Properties fields */
unsigned int support_sync : 1 ; /* synchronous support */
unsigned int support_wide : 1 ; /* wide support */
unsigned int support_dt : 1 ; /* allows DT phases */
unsigned int support_dt_only ; /* disallows ST phases */
unsigned int support_ius ; /* support Information Units */
unsigned int support_qas ; /* supports quick arbitration and selection */
/* Private Fields */
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unsigned int dv_pending : 1 ; /* Internal flag: DV Requested */
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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} ;
enum spi_signal_type {
SPI_SIGNAL_UNKNOWN = 1 ,
SPI_SIGNAL_SE ,
SPI_SIGNAL_LVD ,
SPI_SIGNAL_HVD ,
} ;
struct spi_host_attrs {
enum spi_signal_type signalling ;
} ;
/* accessor functions */
# 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)
# 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)
# define spi_rd_strm(x) (((struct spi_transport_attrs *)&(x)->starget_data)->rd_strm)
# define spi_rti(x) (((struct spi_transport_attrs *)&(x)->starget_data)->rti)
# 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)
# define spi_support_wide(x) (((struct spi_transport_attrs *)&(x)->starget_data)->support_wide)
# define spi_support_dt(x) (((struct spi_transport_attrs *)&(x)->starget_data)->support_dt)
# define spi_support_dt_only(x) (((struct spi_transport_attrs *)&(x)->starget_data)->support_dt_only)
# define spi_support_ius(x) (((struct spi_transport_attrs *)&(x)->starget_data)->support_ius)
# define spi_support_qas(x) (((struct spi_transport_attrs *)&(x)->starget_data)->support_qas)
# define spi_flags(x) (((struct spi_transport_attrs *)&(x)->starget_data)->flags)
# define spi_signalling(h) (((struct spi_host_attrs *)(h)->shost_data)->signalling)
/* The functions by which the transport class and the driver communicate */
struct spi_function_template {
void ( * get_period ) ( struct scsi_target * ) ;
void ( * set_period ) ( struct scsi_target * , int ) ;
void ( * get_offset ) ( struct scsi_target * ) ;
void ( * set_offset ) ( struct scsi_target * , int ) ;
void ( * get_width ) ( struct scsi_target * ) ;
void ( * set_width ) ( struct scsi_target * , int ) ;
void ( * get_iu ) ( struct scsi_target * ) ;
void ( * set_iu ) ( struct scsi_target * , int ) ;
void ( * get_dt ) ( struct scsi_target * ) ;
void ( * set_dt ) ( struct scsi_target * , int ) ;
void ( * get_qas ) ( struct scsi_target * ) ;
void ( * set_qas ) ( struct scsi_target * , int ) ;
void ( * get_wr_flow ) ( struct scsi_target * ) ;
void ( * set_wr_flow ) ( struct scsi_target * , int ) ;
void ( * get_rd_strm ) ( struct scsi_target * ) ;
void ( * set_rd_strm ) ( struct scsi_target * , int ) ;
void ( * get_rti ) ( struct scsi_target * ) ;
void ( * set_rti ) ( struct scsi_target * , int ) ;
void ( * get_pcomp_en ) ( struct scsi_target * ) ;
void ( * set_pcomp_en ) ( struct scsi_target * , int ) ;
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void ( * get_hold_mcs ) ( struct scsi_target * ) ;
void ( * set_hold_mcs ) ( struct scsi_target * , int ) ;
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void ( * get_signalling ) ( struct Scsi_Host * ) ;
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
* wants the attributes displayed in sysfs . If the show_ flag
* is not set , the attribute will be private to the transport
* class */
unsigned long show_period : 1 ;
unsigned long show_offset : 1 ;
unsigned long show_width : 1 ;
unsigned long show_iu : 1 ;
unsigned long show_dt : 1 ;
unsigned long show_qas : 1 ;
unsigned long show_wr_flow : 1 ;
unsigned long show_rd_strm : 1 ;
unsigned long show_rti : 1 ;
unsigned long show_pcomp_en : 1 ;
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unsigned long show_hold_mcs : 1 ;
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} ;
struct scsi_transport_template * spi_attach_transport ( struct spi_function_template * ) ;
void spi_release_transport ( struct scsi_transport_template * ) ;
void spi_schedule_dv_device ( struct scsi_device * ) ;
void spi_dv_device ( struct scsi_device * ) ;
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 ) ;
int spi_populate_sync_msg ( unsigned char * msg , int period , int offset ) ;
int spi_populate_ppr_msg ( unsigned char * msg , int period , int offset , int width ,
int options ) ;
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# endif /* SCSI_TRANSPORT_SPI_H */