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/*
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/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 void ktti_init_proto( PIA *pi)
{ MOD_INC_USE_COUNT;
}
static void ktti_release_proto( PIA *pi)
{ MOD_DEC_USE_COUNT;
}
struct pi_protocol ktti = {"ktti",0,1,2,1,1,
ktti_write_regr,
ktti_read_regr,
ktti_write_block,
ktti_read_block,
ktti_connect,
ktti_disconnect,
0,
0,
0,
ktti_log_adapter,
ktti_init_proto,
ktti_release_proto
};
#ifdef MODULE
int init_module(void)
{ return pi_register( &ktti ) - 1;
}
void cleanup_module(void)
{ pi_unregister( &ktti );
}
#endif
/* end of ktti.c */
MODULE_LICENSE("GPL");
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