/*         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)