2 on20.c (c) 1996-8 Grant R. Guenther <grant@torque.net>
3 Under the terms of the GNU General Public License.
5 on20.c is a low-level protocol driver for the
6 Onspec 90c20 parallel to IDE adapter.
11 1.01 GRG 1998.05.06 init_proto, release_proto
15 #define ON20_VERSION "1.01"
17 #include <linux/module.h>
18 #include <linux/init.h>
19 #include <linux/delay.h>
20 #include <linux/kernel.h>
21 #include <linux/types.h>
22 #include <linux/wait.h>
27 #define op(f) w2(4);w0(f);w2(5);w2(0xd);w2(5);w2(0xd);w2(5);w2(4);
28 #define vl(v) w2(4);w0(v);w2(5);w2(7);w2(5);w2(4);
30 #define j44(a,b) (((a>>4)&0x0f)|(b&0xf0))
32 /* cont = 0 - access the IDE register file
33 cont = 1 - access the IDE command set
36 static int on20_read_regr( PIA
*pi
, int cont
, int regr
)
40 r
= (regr
<<2) + 1 + cont
;
46 case 0: w2(4); w2(6); l
= r1();
47 w2(4); w2(6); h
= r1();
48 w2(4); w2(6); w2(4); w2(6); w2(4);
51 case 1: w2(4); w2(0x26); r
= r0();
52 w2(4); w2(0x26); w2(4);
59 static void on20_write_regr( PIA
*pi
, int cont
, int regr
, int val
)
63 r
= (regr
<<2) + 1 + cont
;
70 static void on20_connect ( PIA
*pi
)
72 { pi
->saved_r0
= r0();
75 w2(4);w0(0);w2(0xc);w2(4);w2(6);w2(4);w2(6);w2(4);
76 if (pi
->mode
) { op(2); vl(8); op(2); vl(9); }
77 else { op(2); vl(0); op(2); vl(8); }
80 static void on20_disconnect ( PIA
*pi
)
82 { w2(4);w0(7);w2(4);w2(0xc);w2(4);
87 static void on20_read_block( PIA
*pi
, char * buf
, int count
)
95 w2(4); w2(0x26); buf
[k
] = r0();
97 w2(6); l
= r1(); w2(4);
98 w2(6); h
= r1(); w2(4);
104 static void on20_write_block( PIA
*pi
, char * buf
, int count
)
110 for (k
=0;k
<count
;k
++) { w2(5); w0(buf
[k
]); w2(7); }
114 static void on20_log_adapter( PIA
*pi
, char * scratch
, int verbose
)
116 { char *mode_string
[2] = {"4-bit","8-bit"};
118 printk("%s: on20 %s, OnSpec 90c20 at 0x%x, ",
119 pi
->device
,ON20_VERSION
,pi
->port
);
120 printk("mode %d (%s), delay %d\n",pi
->mode
,
121 mode_string
[pi
->mode
],pi
->delay
);
125 static struct pi_protocol on20
= {
126 .owner
= THIS_MODULE
,
132 .write_regr
= on20_write_regr
,
133 .read_regr
= on20_read_regr
,
134 .write_block
= on20_write_block
,
135 .read_block
= on20_read_block
,
136 .connect
= on20_connect
,
137 .disconnect
= on20_disconnect
,
138 .log_adapter
= on20_log_adapter
,
141 static int __init
on20_init(void)
143 return paride_register(&on20
);
146 static void __exit
on20_exit(void)
148 paride_unregister(&on20
);
151 MODULE_LICENSE("GPL");
152 module_init(on20_init
)
153 module_exit(on20_exit
)
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