FreeBSD/Linux Kernel Cross Reference
sys/isa/fdc.h
1 /*-
2 * Copyright (c) 1990 The Regents of the University of California.
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. All advertising materials mentioning features or use of this software
14 * must display the following acknowledgement:
15 * This product includes software developed by the University of
16 * California, Berkeley and its contributors.
17 * 4. Neither the name of the University nor the names of its contributors
18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 *
33 * from: @(#)fd.c 7.4 (Berkeley) 5/25/91
34 * $FreeBSD$
35 *
36 */
37
38 enum fdc_type
39 {
40 FDC_NE765, FDC_I82077, FDC_NE72065, FDC_UNKNOWN = -1
41 };
42
43
44 /***********************************************************************\
45 * Per controller structure. *
46 \***********************************************************************/
47 struct fdc_data
48 {
49 int fdcu; /* our unit number */
50 int dmachan;
51 int flags;
52 #define FDC_ATTACHED 0x01
53 #define FDC_STAT_VALID 0x08
54 #define FDC_HAS_FIFO 0x10
55 #define FDC_NEEDS_RESET 0x20
56 #define FDC_NODMA 0x40
57 #define FDC_ISPNP 0x80
58 #define FDC_ISPCMCIA 0x100
59 struct fd_data *fd;
60 int fdu; /* the active drive */
61 int state;
62 int retry;
63 #ifndef PC98
64 int fdout; /* mirror of the w/o digital output reg */
65 #endif
66 u_int status[7]; /* copy of the registers */
67 enum fdc_type fdct; /* chip version of FDC */
68 int fdc_errs; /* number of logged errors */
69 struct buf_queue_head head;
70 struct buf *bp; /* active buffer */
71 int dma_overruns; /* number of DMA overruns */
72 #ifdef PC98
73 struct resource *res_ioport, *res_fdsio, *res_fdemsio;
74 struct resource *res_irq, *res_drq;
75 int rid_ioport, rid_irq, rid_drq;
76 #else
77 struct resource *res_ioport, *res_ctl, *res_irq, *res_drq;
78 int rid_ioport, rid_ctl, rid_irq, rid_drq;
79 #endif
80 int port_off;
81 bus_space_tag_t portt;
82 bus_space_handle_t porth;
83 #ifdef PC98
84 bus_space_tag_t sc_fdsiot;
85 bus_space_handle_t sc_fdsioh;
86 bus_space_tag_t sc_fdemsiot;
87 bus_space_handle_t sc_fdemsioh;
88 #else
89 bus_space_tag_t ctlt;
90 bus_space_handle_t ctlh;
91 #endif
92 void *fdc_intr;
93 struct device *fdc_dev;
94 #ifndef PC98
95 void (*fdctl_wr)(struct fdc_data *fdc, u_int8_t v);
96 #endif
97 };
98
99 /***********************************************************************\
100 * Throughout this file the following conventions will be used: *
101 * fd is a pointer to the fd_data struct for the drive in question *
102 * fdc is a pointer to the fdc_data struct for the controller *
103 * fdu is the floppy drive unit number *
104 * fdcu is the floppy controller unit number *
105 * fdsu is the floppy drive unit number on that controller. (sub-unit) *
106 \***********************************************************************/
107 typedef int fdu_t;
108 typedef int fdcu_t;
109 typedef int fdsu_t;
110 typedef struct fd_data *fd_p;
111 typedef struct fdc_data *fdc_p;
112 typedef enum fdc_type fdc_t;
113
114 #define FDUNIT(s) (((s) >> 6) & 3)
115 #define FDTYPE(s) ((s) & 0x3f)
116
117 /*
118 * fdc maintains a set (1!) of ivars per child of each controller.
119 */
120 enum fdc_device_ivars {
121 FDC_IVAR_FDUNIT,
122 };
123
124 /*
125 * Simple access macros for the ivars.
126 */
127 #define FDC_ACCESSOR(A, B, T) \
128 static __inline T fdc_get_ ## A(device_t dev) \
129 { \
130 uintptr_t v; \
131 BUS_READ_IVAR(device_get_parent(dev), dev, FDC_IVAR_ ## B, &v); \
132 return (T) v; \
133 }
134 FDC_ACCESSOR(fdunit, FDUNIT, int)
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