154 lines
3.0 KiB
C
154 lines
3.0 KiB
C
|
/*
|
||
|
|
on20.c (c) 1996-8 Grant R. Guenther <grant@torque.net>
|
||
|
|
Under the terms of the GNU General Public License.
|
||
|
|
|
||
|
|
on20.c is a low-level protocol driver for the
|
||
|
|
Onspec 90c20 parallel to IDE adapter.
|
||
|
|
*/
|
||
|
|
|
||
|
|
/* Changes:
|
||
|
|
|
||
|
|
1.01 GRG 1998.05.06 init_proto, release_proto
|
||
|
|
|
||
|
|
*/
|
||
|
|
|
||
|
|
#define ON20_VERSION "1.01"
|
||
|
|
|
||
|
|
#include <linux/module.h>
|
||
|
|
#include <linux/init.h>
|
||
|
|
#include <linux/delay.h>
|
||
|
|
#include <linux/kernel.h>
|
||
|
|
#include <linux/types.h>
|
||
|
|
#include <linux/wait.h>
|
||
|
|
#include <asm/io.h>
|
||
|
|
|
||
|
|
#include "paride.h"
|
||
|
|
|
||
|
|
#define op(f) w2(4);w0(f);w2(5);w2(0xd);w2(5);w2(0xd);w2(5);w2(4);
|
||
|
|
#define vl(v) w2(4);w0(v);w2(5);w2(7);w2(5);w2(4);
|
||
|
|
|
||
|
|
#define j44(a,b) (((a>>4)&0x0f)|(b&0xf0))
|
||
|
|
|
||
|
|
/* cont = 0 - access the IDE register file
|
||
|
|
cont = 1 - access the IDE command set
|
||
|
|
*/
|
||
|
|
|
||
|
|
static int on20_read_regr( PIA *pi, int cont, int regr )
|
||
|
|
|
||
|
|
{ int h,l, r ;
|
||
|
|
|
||
|
|
r = (regr<<2) + 1 + cont;
|
||
|
|
|
||
|
|
op(1); vl(r); op(0);
|
||
|
|
|
||
|
|
switch (pi->mode) {
|
||
|
|
|
||
|
|
case 0: w2(4); w2(6); l = r1();
|
||
|
|
w2(4); w2(6); h = r1();
|
||
|
|
w2(4); w2(6); w2(4); w2(6); w2(4);
|
||
|
|
return j44(l,h);
|
||
|
|
|
||
|
|
case 1: w2(4); w2(0x26); r = r0();
|
||
|
|
w2(4); w2(0x26); w2(4);
|
||
|
|
return r;
|
||
|
|
|
||
|
|
}
|
||
|
|
return -1;
|
||
|
|
}
|
||
|
|
|
||
|
|
static void on20_write_regr( PIA *pi, int cont, int regr, int val )
|
||
|
|
|
||
|
|
{ int r;
|
||
|
|
|
||
|
|
r = (regr<<2) + 1 + cont;
|
||
|
|
|
||
|
|
op(1); vl(r);
|
||
|
|
op(0); vl(val);
|
||
|
|
op(0); vl(val);
|
||
|
|
}
|
||
|
|
|
||
|
|
static void on20_connect ( PIA *pi)
|
||
|
|
|
||
|
|
{ pi->saved_r0 = r0();
|
||
|
|
pi->saved_r2 = r2();
|
||
|
|
|
||
|
|
w2(4);w0(0);w2(0xc);w2(4);w2(6);w2(4);w2(6);w2(4);
|
||
|
|
if (pi->mode) { op(2); vl(8); op(2); vl(9); }
|
||
|
|
else { op(2); vl(0); op(2); vl(8); }
|
||
|
|
}
|
||
|
|
|
||
|
|
static void on20_disconnect ( PIA *pi )
|
||
|
|
|
||
|
|
{ w2(4);w0(7);w2(4);w2(0xc);w2(4);
|
||
|
|
w0(pi->saved_r0);
|
||
|
|
w2(pi->saved_r2);
|
||
|
|
}
|
||
|
|
|
||
|
|
static void on20_read_block( PIA *pi, char * buf, int count )
|
||
|
|
|
||
|
|
{ int k, l, h;
|
||
|
|
|
||
|
|
op(1); vl(1); op(0);
|
||
|
|
|
||
|
|
for (k=0;k<count;k++)
|
||
|
|
if (pi->mode) {
|
||
|
|
w2(4); w2(0x26); buf[k] = r0();
|
||
|
|
} else {
|
||
|
|
w2(6); l = r1(); w2(4);
|
||
|
|
w2(6); h = r1(); w2(4);
|
||
|
|
buf[k] = j44(l,h);
|
||
|
|
}
|
||
|
|
w2(4);
|
||
|
|
}
|
||
|
|
|
||
|
|
static void on20_write_block( PIA *pi, char * buf, int count )
|
||
|
|
|
||
|
|
{ int k;
|
||
|
|
|
||
|
|
op(1); vl(1); op(0);
|
||
|
|
|
||
|
|
for (k=0;k<count;k++) { w2(5); w0(buf[k]); w2(7); }
|
||
|
|
w2(4);
|
||
|
|
}
|
||
|
|
|
||
|
|
static void on20_log_adapter( PIA *pi, char * scratch, int verbose )
|
||
|
|
|
||
|
|
{ char *mode_string[2] = {"4-bit","8-bit"};
|
||
|
|
|
||
|
|
printk("%s: on20 %s, OnSpec 90c20 at 0x%x, ",
|
||
|
|
pi->device,ON20_VERSION,pi->port);
|
||
|
|
printk("mode %d (%s), delay %d\n",pi->mode,
|
||
|
|
mode_string[pi->mode],pi->delay);
|
||
|
|
|
||
|
|
}
|
||
|
|
|
||
|
|
static struct pi_protocol on20 = {
|
||
|
|
.owner = THIS_MODULE,
|
||
|
|
.name = "on20",
|
||
|
|
.max_mode = 2,
|
||
|
|
.epp_first = 2,
|
||
|
|
.default_delay = 1,
|
||
|
|
.max_units = 1,
|
||
|
|
.write_regr = on20_write_regr,
|
||
|
|
.read_regr = on20_read_regr,
|
||
|
|
.write_block = on20_write_block,
|
||
|
|
.read_block = on20_read_block,
|
||
|
|
.connect = on20_connect,
|
||
|
|
.disconnect = on20_disconnect,
|
||
|
|
.log_adapter = on20_log_adapter,
|
||
|
|
};
|
||
|
|
|
||
|
|
static int __init on20_init(void)
|
||
|
|
{
|
||
|
|
return pi_register(&on20)-1;
|
||
|
|
}
|
||
|
|
|
||
|
|
static void __exit on20_exit(void)
|
||
|
|
{
|
||
|
|
pi_unregister(&on20);
|
||
|
|
}
|
||
|
|
|
||
|
|
MODULE_LICENSE("GPL");
|
||
|
|
module_init(on20_init)
|
||
|
|
module_exit(on20_exit)
|