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1 | /* |
2 | * Parallel SCSI (SPI) transport specific attributes exported to sysfs. | |
3 | * | |
4 | * Copyright (c) 2003 Silicon Graphics, Inc. All rights reserved. | |
5 | * | |
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. | |
10 | * | |
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. | |
15 | * | |
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 | |
19 | */ | |
20 | #ifndef SCSI_TRANSPORT_SPI_H | |
21 | #define SCSI_TRANSPORT_SPI_H | |
22 | ||
23 | #include <linux/config.h> | |
24 | #include <linux/transport_class.h> | |
25 | ||
26 | struct scsi_transport_template; | |
27 | ||
28 | struct spi_transport_attrs { | |
29 | int period; /* value in the PPR/SDTR command */ | |
62a86129 | 30 | int min_period; |
1da177e4 | 31 | int offset; |
62a86129 | 32 | int max_offset; |
1da177e4 | 33 | unsigned int width:1; /* 0 - narrow, 1 - wide */ |
62a86129 | 34 | unsigned int max_width:1; |
1da177e4 LT |
35 | unsigned int iu:1; /* Information Units enabled */ |
36 | unsigned int dt:1; /* DT clocking enabled */ | |
37 | unsigned int qas:1; /* Quick Arbitration and Selection enabled */ | |
38 | unsigned int wr_flow:1; /* Write Flow control enabled */ | |
39 | unsigned int rd_strm:1; /* Read streaming enabled */ | |
40 | unsigned int rti:1; /* Retain Training Information */ | |
41 | unsigned int pcomp_en:1;/* Precompensation enabled */ | |
42 | unsigned int initial_dv:1; /* DV done to this target yet */ | |
43 | unsigned long flags; /* flags field for drivers to use */ | |
44 | /* Device Properties fields */ | |
45 | unsigned int support_sync:1; /* synchronous support */ | |
46 | unsigned int support_wide:1; /* wide support */ | |
47 | unsigned int support_dt:1; /* allows DT phases */ | |
48 | unsigned int support_dt_only; /* disallows ST phases */ | |
49 | unsigned int support_ius; /* support Information Units */ | |
50 | unsigned int support_qas; /* supports quick arbitration and selection */ | |
51 | /* Private Fields */ | |
52 | unsigned int dv_pending:1; /* Internal flag */ | |
53 | struct semaphore dv_sem; /* semaphore to serialise dv */ | |
54 | }; | |
55 | ||
56 | enum spi_signal_type { | |
57 | SPI_SIGNAL_UNKNOWN = 1, | |
58 | SPI_SIGNAL_SE, | |
59 | SPI_SIGNAL_LVD, | |
60 | SPI_SIGNAL_HVD, | |
61 | }; | |
62 | ||
63 | struct spi_host_attrs { | |
64 | enum spi_signal_type signalling; | |
65 | }; | |
66 | ||
67 | /* accessor functions */ | |
68 | #define spi_period(x) (((struct spi_transport_attrs *)&(x)->starget_data)->period) | |
62a86129 | 69 | #define spi_min_period(x) (((struct spi_transport_attrs *)&(x)->starget_data)->min_period) |
1da177e4 | 70 | #define spi_offset(x) (((struct spi_transport_attrs *)&(x)->starget_data)->offset) |
62a86129 | 71 | #define spi_max_offset(x) (((struct spi_transport_attrs *)&(x)->starget_data)->max_offset) |
1da177e4 | 72 | #define spi_width(x) (((struct spi_transport_attrs *)&(x)->starget_data)->width) |
62a86129 | 73 | #define spi_max_width(x) (((struct spi_transport_attrs *)&(x)->starget_data)->max_width) |
1da177e4 LT |
74 | #define spi_iu(x) (((struct spi_transport_attrs *)&(x)->starget_data)->iu) |
75 | #define spi_dt(x) (((struct spi_transport_attrs *)&(x)->starget_data)->dt) | |
76 | #define spi_qas(x) (((struct spi_transport_attrs *)&(x)->starget_data)->qas) | |
77 | #define spi_wr_flow(x) (((struct spi_transport_attrs *)&(x)->starget_data)->wr_flow) | |
78 | #define spi_rd_strm(x) (((struct spi_transport_attrs *)&(x)->starget_data)->rd_strm) | |
79 | #define spi_rti(x) (((struct spi_transport_attrs *)&(x)->starget_data)->rti) | |
80 | #define spi_pcomp_en(x) (((struct spi_transport_attrs *)&(x)->starget_data)->pcomp_en) | |
81 | #define spi_initial_dv(x) (((struct spi_transport_attrs *)&(x)->starget_data)->initial_dv) | |
82 | ||
83 | #define spi_support_sync(x) (((struct spi_transport_attrs *)&(x)->starget_data)->support_sync) | |
84 | #define spi_support_wide(x) (((struct spi_transport_attrs *)&(x)->starget_data)->support_wide) | |
85 | #define spi_support_dt(x) (((struct spi_transport_attrs *)&(x)->starget_data)->support_dt) | |
86 | #define spi_support_dt_only(x) (((struct spi_transport_attrs *)&(x)->starget_data)->support_dt_only) | |
87 | #define spi_support_ius(x) (((struct spi_transport_attrs *)&(x)->starget_data)->support_ius) | |
88 | #define spi_support_qas(x) (((struct spi_transport_attrs *)&(x)->starget_data)->support_qas) | |
89 | ||
90 | #define spi_flags(x) (((struct spi_transport_attrs *)&(x)->starget_data)->flags) | |
91 | #define spi_signalling(h) (((struct spi_host_attrs *)(h)->shost_data)->signalling) | |
92 | ||
93 | ||
94 | ||
95 | /* The functions by which the transport class and the driver communicate */ | |
96 | struct spi_function_template { | |
97 | void (*get_period)(struct scsi_target *); | |
98 | void (*set_period)(struct scsi_target *, int); | |
99 | void (*get_offset)(struct scsi_target *); | |
100 | void (*set_offset)(struct scsi_target *, int); | |
101 | void (*get_width)(struct scsi_target *); | |
102 | void (*set_width)(struct scsi_target *, int); | |
103 | void (*get_iu)(struct scsi_target *); | |
104 | void (*set_iu)(struct scsi_target *, int); | |
105 | void (*get_dt)(struct scsi_target *); | |
106 | void (*set_dt)(struct scsi_target *, int); | |
107 | void (*get_qas)(struct scsi_target *); | |
108 | void (*set_qas)(struct scsi_target *, int); | |
109 | void (*get_wr_flow)(struct scsi_target *); | |
110 | void (*set_wr_flow)(struct scsi_target *, int); | |
111 | void (*get_rd_strm)(struct scsi_target *); | |
112 | void (*set_rd_strm)(struct scsi_target *, int); | |
113 | void (*get_rti)(struct scsi_target *); | |
114 | void (*set_rti)(struct scsi_target *, int); | |
115 | void (*get_pcomp_en)(struct scsi_target *); | |
116 | void (*set_pcomp_en)(struct scsi_target *, int); | |
117 | void (*get_signalling)(struct Scsi_Host *); | |
118 | void (*set_signalling)(struct Scsi_Host *, enum spi_signal_type); | |
119 | /* The driver sets these to tell the transport class it | |
120 | * wants the attributes displayed in sysfs. If the show_ flag | |
121 | * is not set, the attribute will be private to the transport | |
122 | * class */ | |
123 | unsigned long show_period:1; | |
124 | unsigned long show_offset:1; | |
125 | unsigned long show_width:1; | |
126 | unsigned long show_iu:1; | |
127 | unsigned long show_dt:1; | |
128 | unsigned long show_qas:1; | |
129 | unsigned long show_wr_flow:1; | |
130 | unsigned long show_rd_strm:1; | |
131 | unsigned long show_rti:1; | |
132 | unsigned long show_pcomp_en:1; | |
133 | }; | |
134 | ||
135 | struct scsi_transport_template *spi_attach_transport(struct spi_function_template *); | |
136 | void spi_release_transport(struct scsi_transport_template *); | |
137 | void spi_schedule_dv_device(struct scsi_device *); | |
138 | void spi_dv_device(struct scsi_device *); | |
139 | void spi_display_xfer_agreement(struct scsi_target *); | |
140 | ||
141 | #endif /* SCSI_TRANSPORT_SPI_H */ |