/*
|
ktti.c (c) 1998 Grant R. Guenther <grant@torque.net>
|
Under the terms of the GNU General Public License.
|
|
ktti.c is a low-level protocol driver for the KT Technology
|
parallel port adapter. This adapter is used in the "PHd"
|
portable hard-drives. As far as I can tell, this device
|
supports 4-bit mode _only_.
|
|
*/
|
|
#define KTTI_VERSION "1.0"
|
|
#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 j44(a,b) (((a>>4)&0x0f)|(b&0xf0))
|
|
/* cont = 0 - access the IDE register file
|
cont = 1 - access the IDE command set
|
*/
|
|
static int cont_map[2] = { 0x10, 0x08 };
|
|
static void ktti_write_regr( PIA *pi, int cont, int regr, int val)
|
|
{ int r;
|
|
r = regr + cont_map[cont];
|
|
w0(r); w2(0xb); w2(0xa); w2(3); w2(6);
|
w0(val); w2(3); w0(0); w2(6); w2(0xb);
|
}
|
|
static int ktti_read_regr( PIA *pi, int cont, int regr )
|
|
{ int a, b, r;
|
|
r = regr + cont_map[cont];
|
|
w0(r); w2(0xb); w2(0xa); w2(9); w2(0xc); w2(9);
|
a = r1(); w2(0xc); b = r1(); w2(9); w2(0xc); w2(9);
|
return j44(a,b);
|
|
}
|
|
static void ktti_read_block( PIA *pi, char * buf, int count )
|
|
{ int k, a, b;
|
|
for (k=0;k<count/2;k++) {
|
w0(0x10); w2(0xb); w2(0xa); w2(9); w2(0xc); w2(9);
|
a = r1(); w2(0xc); b = r1(); w2(9);
|
buf[2*k] = j44(a,b);
|
a = r1(); w2(0xc); b = r1(); w2(9);
|
buf[2*k+1] = j44(a,b);
|
}
|
}
|
|
static void ktti_write_block( PIA *pi, char * buf, int count )
|
|
{ int k;
|
|
for (k=0;k<count/2;k++) {
|
w0(0x10); w2(0xb); w2(0xa); w2(3); w2(6);
|
w0(buf[2*k]); w2(3);
|
w0(buf[2*k+1]); w2(6);
|
w2(0xb);
|
}
|
}
|
|
static void ktti_connect ( PIA *pi )
|
|
{ pi->saved_r0 = r0();
|
pi->saved_r2 = r2();
|
w2(0xb); w2(0xa); w0(0); w2(3); w2(6);
|
}
|
|
static void ktti_disconnect ( PIA *pi )
|
|
{ w2(0xb); w2(0xa); w0(0xa0); w2(3); w2(4);
|
w0(pi->saved_r0);
|
w2(pi->saved_r2);
|
}
|
|
static void ktti_log_adapter( PIA *pi, char * scratch, int verbose )
|
|
{ printk("%s: ktti %s, KT adapter at 0x%x, delay %d\n",
|
pi->device,KTTI_VERSION,pi->port,pi->delay);
|
|
}
|
|
static struct pi_protocol ktti = {
|
.owner = THIS_MODULE,
|
.name = "ktti",
|
.max_mode = 1,
|
.epp_first = 2,
|
.default_delay = 1,
|
.max_units = 1,
|
.write_regr = ktti_write_regr,
|
.read_regr = ktti_read_regr,
|
.write_block = ktti_write_block,
|
.read_block = ktti_read_block,
|
.connect = ktti_connect,
|
.disconnect = ktti_disconnect,
|
.log_adapter = ktti_log_adapter,
|
};
|
|
static int __init ktti_init(void)
|
{
|
return paride_register(&ktti);
|
}
|
|
static void __exit ktti_exit(void)
|
{
|
paride_unregister(&ktti);
|
}
|
|
MODULE_LICENSE("GPL");
|
module_init(ktti_init)
|
module_exit(ktti_exit)
|
