2 * Parallel SCSI (SPI) transport specific attributes exported to sysfs.
4 * Copyright (c) 2003 Silicon Graphics, Inc. All rights reserved.
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
20 #ifndef SCSI_TRANSPORT_SPI_H
21 #define SCSI_TRANSPORT_SPI_H
23 #include <linux/config.h>
25 struct scsi_transport_template;
27 struct spi_transport_attrs {
28 int period; /* value in the PPR/SDTR command */
30 unsigned int width:1; /* 0 - narrow, 1 - wide */
31 unsigned int iu:1; /* Information Units enabled */
32 unsigned int dt:1; /* DT clocking enabled */
33 unsigned int qas:1; /* Quick Arbitration and Selection enabled */
34 unsigned int wr_flow:1; /* Write Flow control enabled */
35 unsigned int rd_strm:1; /* Read streaming enabled */
36 unsigned int rti:1; /* Retain Training Information */
37 unsigned int pcomp_en:1;/* Precompensation enabled */
38 unsigned int initial_dv:1; /* DV done to this target yet */
39 unsigned long flags; /* flags field for drivers to use */
40 /* Device Properties fields */
41 unsigned int support_sync:1; /* synchronous support */
42 unsigned int support_wide:1; /* wide support */
43 unsigned int support_dt:1; /* allows DT phases */
44 unsigned int support_dt_only; /* disallows ST phases */
45 unsigned int support_ius; /* support Information Units */
46 unsigned int support_qas; /* supports quick arbitration and selection */
48 unsigned int dv_pending:1; /* Internal flag */
49 struct semaphore dv_sem; /* semaphore to serialise dv */
52 enum spi_signal_type {
53 SPI_SIGNAL_UNKNOWN = 1,
59 struct spi_host_attrs {
60 enum spi_signal_type signalling;
63 /* accessor functions */
64 #define spi_period(x) (((struct spi_transport_attrs *)&(x)->starget_data)->period)
65 #define spi_offset(x) (((struct spi_transport_attrs *)&(x)->starget_data)->offset)
66 #define spi_width(x) (((struct spi_transport_attrs *)&(x)->starget_data)->width)
67 #define spi_iu(x) (((struct spi_transport_attrs *)&(x)->starget_data)->iu)
68 #define spi_dt(x) (((struct spi_transport_attrs *)&(x)->starget_data)->dt)
69 #define spi_qas(x) (((struct spi_transport_attrs *)&(x)->starget_data)->qas)
70 #define spi_wr_flow(x) (((struct spi_transport_attrs *)&(x)->starget_data)->wr_flow)
71 #define spi_rd_strm(x) (((struct spi_transport_attrs *)&(x)->starget_data)->rd_strm)
72 #define spi_rti(x) (((struct spi_transport_attrs *)&(x)->starget_data)->rti)
73 #define spi_pcomp_en(x) (((struct spi_transport_attrs *)&(x)->starget_data)->pcomp_en)
74 #define spi_initial_dv(x) (((struct spi_transport_attrs *)&(x)->starget_data)->initial_dv)
76 #define spi_support_sync(x) (((struct spi_transport_attrs *)&(x)->starget_data)->support_sync)
77 #define spi_support_wide(x) (((struct spi_transport_attrs *)&(x)->starget_data)->support_wide)
78 #define spi_support_dt(x) (((struct spi_transport_attrs *)&(x)->starget_data)->support_dt)
79 #define spi_support_dt_only(x) (((struct spi_transport_attrs *)&(x)->starget_data)->support_dt_only)
80 #define spi_support_ius(x) (((struct spi_transport_attrs *)&(x)->starget_data)->support_ius)
81 #define spi_support_qas(x) (((struct spi_transport_attrs *)&(x)->starget_data)->support_qas)
83 #define spi_flags(x) (((struct spi_transport_attrs *)&(x)->starget_data)->flags)
84 #define spi_signalling(h) (((struct spi_host_attrs *)(h)->shost_data)->signalling)
88 /* The functions by which the transport class and the driver communicate */
89 struct spi_function_template {
90 void (*get_period)(struct scsi_target *);
91 void (*set_period)(struct scsi_target *, int);
92 void (*get_offset)(struct scsi_target *);
93 void (*set_offset)(struct scsi_target *, int);
94 void (*get_width)(struct scsi_target *);
95 void (*set_width)(struct scsi_target *, int);
96 void (*get_iu)(struct scsi_target *);
97 void (*set_iu)(struct scsi_target *, int);
98 void (*get_dt)(struct scsi_target *);
99 void (*set_dt)(struct scsi_target *, int);
100 void (*get_qas)(struct scsi_target *);
101 void (*set_qas)(struct scsi_target *, int);
102 void (*get_wr_flow)(struct scsi_target *);
103 void (*set_wr_flow)(struct scsi_target *, int);
104 void (*get_rd_strm)(struct scsi_target *);
105 void (*set_rd_strm)(struct scsi_target *, int);
106 void (*get_rti)(struct scsi_target *);
107 void (*set_rti)(struct scsi_target *, int);
108 void (*get_pcomp_en)(struct scsi_target *);
109 void (*set_pcomp_en)(struct scsi_target *, int);
110 void (*get_signalling)(struct Scsi_Host *);
111 void (*set_signalling)(struct Scsi_Host *, enum spi_signal_type);
112 /* The driver sets these to tell the transport class it
113 * wants the attributes displayed in sysfs. If the show_ flag
114 * is not set, the attribute will be private to the transport
116 unsigned long show_period:1;
117 unsigned long show_offset:1;
118 unsigned long show_width:1;
119 unsigned long show_iu:1;
120 unsigned long show_dt:1;
121 unsigned long show_qas:1;
122 unsigned long show_wr_flow:1;
123 unsigned long show_rd_strm:1;
124 unsigned long show_rti:1;
125 unsigned long show_pcomp_en:1;
128 struct scsi_transport_template *spi_attach_transport(struct spi_function_template *);
129 void spi_release_transport(struct scsi_transport_template *);
130 void spi_schedule_dv_device(struct scsi_device *);
131 void spi_dv_device(struct scsi_device *);
133 #endif /* SCSI_TRANSPORT_SPI_H */