163 lines
3.3 KiB
C
163 lines
3.3 KiB
C
/*
|
|
aten.c (c) 1997-8 Grant R. Guenther <grant@torque.net>
|
|
Under the terms of the GNU General Public License.
|
|
|
|
aten.c is a low-level protocol driver for the ATEN EH-100
|
|
parallel port adapter. The EH-100 supports 4-bit and 8-bit
|
|
modes only. There is also an EH-132 which supports EPP mode
|
|
transfers. The EH-132 is not yet supported.
|
|
|
|
*/
|
|
|
|
/* Changes:
|
|
|
|
1.01 GRG 1998.05.05 init_proto, release_proto
|
|
|
|
*/
|
|
|
|
#define ATEN_VERSION "1.01"
|
|
|
|
#include <linux/module.h>
|
|
#include <linux/init.h>
|
|
#include <linux/delay.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/wait.h>
|
|
#include <linux/types.h>
|
|
#include <asm/io.h>
|
|
|
|
#include "paride.h"
|
|
|
|
#define j44(a,b) ((((a>>4)&0x0f)|(b&0xf0))^0x88)
|
|
|
|
/* cont = 0 - access the IDE register file
|
|
cont = 1 - access the IDE command set
|
|
*/
|
|
|
|
static int cont_map[2] = { 0x08, 0x20 };
|
|
|
|
static void aten_write_regr( PIA *pi, int cont, int regr, int val)
|
|
|
|
{ int r;
|
|
|
|
r = regr + cont_map[cont] + 0x80;
|
|
|
|
w0(r); w2(0xe); w2(6); w0(val); w2(7); w2(6); w2(0xc);
|
|
}
|
|
|
|
static int aten_read_regr( PIA *pi, int cont, int regr )
|
|
|
|
{ int a, b, r;
|
|
|
|
r = regr + cont_map[cont] + 0x40;
|
|
|
|
switch (pi->mode) {
|
|
|
|
case 0: w0(r); w2(0xe); w2(6);
|
|
w2(7); w2(6); w2(0);
|
|
a = r1(); w0(0x10); b = r1(); w2(0xc);
|
|
return j44(a,b);
|
|
|
|
case 1: r |= 0x10;
|
|
w0(r); w2(0xe); w2(6); w0(0xff);
|
|
w2(0x27); w2(0x26); w2(0x20);
|
|
a = r0();
|
|
w2(0x26); w2(0xc);
|
|
return a;
|
|
}
|
|
return -1;
|
|
}
|
|
|
|
static void aten_read_block( PIA *pi, char * buf, int count )
|
|
|
|
{ int k, a, b, c, d;
|
|
|
|
switch (pi->mode) {
|
|
|
|
case 0: w0(0x48); w2(0xe); w2(6);
|
|
for (k=0;k<count/2;k++) {
|
|
w2(7); w2(6); w2(2);
|
|
a = r1(); w0(0x58); b = r1();
|
|
w2(0); d = r1(); w0(0x48); c = r1();
|
|
buf[2*k] = j44(c,d);
|
|
buf[2*k+1] = j44(a,b);
|
|
}
|
|
w2(0xc);
|
|
break;
|
|
|
|
case 1: w0(0x58); w2(0xe); w2(6);
|
|
for (k=0;k<count/2;k++) {
|
|
w2(0x27); w2(0x26); w2(0x22);
|
|
a = r0(); w2(0x20); b = r0();
|
|
buf[2*k] = b; buf[2*k+1] = a;
|
|
}
|
|
w2(0x26); w2(0xc);
|
|
break;
|
|
}
|
|
}
|
|
|
|
static void aten_write_block( PIA *pi, char * buf, int count )
|
|
|
|
{ int k;
|
|
|
|
w0(0x88); w2(0xe); w2(6);
|
|
for (k=0;k<count/2;k++) {
|
|
w0(buf[2*k+1]); w2(0xe); w2(6);
|
|
w0(buf[2*k]); w2(7); w2(6);
|
|
}
|
|
w2(0xc);
|
|
}
|
|
|
|
static void aten_connect ( PIA *pi )
|
|
|
|
{ pi->saved_r0 = r0();
|
|
pi->saved_r2 = r2();
|
|
w2(0xc);
|
|
}
|
|
|
|
static void aten_disconnect ( PIA *pi )
|
|
|
|
{ w0(pi->saved_r0);
|
|
w2(pi->saved_r2);
|
|
}
|
|
|
|
static void aten_log_adapter( PIA *pi, char * scratch, int verbose )
|
|
|
|
{ char *mode_string[2] = {"4-bit","8-bit"};
|
|
|
|
printk("%s: aten %s, ATEN EH-100 at 0x%x, ",
|
|
pi->device,ATEN_VERSION,pi->port);
|
|
printk("mode %d (%s), delay %d\n",pi->mode,
|
|
mode_string[pi->mode],pi->delay);
|
|
|
|
}
|
|
|
|
static struct pi_protocol aten = {
|
|
.owner = THIS_MODULE,
|
|
.name = "aten",
|
|
.max_mode = 2,
|
|
.epp_first = 2,
|
|
.default_delay = 1,
|
|
.max_units = 1,
|
|
.write_regr = aten_write_regr,
|
|
.read_regr = aten_read_regr,
|
|
.write_block = aten_write_block,
|
|
.read_block = aten_read_block,
|
|
.connect = aten_connect,
|
|
.disconnect = aten_disconnect,
|
|
.log_adapter = aten_log_adapter,
|
|
};
|
|
|
|
static int __init aten_init(void)
|
|
{
|
|
return pi_register(&aten)-1;
|
|
}
|
|
|
|
static void __exit aten_exit(void)
|
|
{
|
|
pi_unregister( &aten );
|
|
}
|
|
|
|
MODULE_LICENSE("GPL");
|
|
module_init(aten_init)
|
|
module_exit(aten_exit)
|