1*4882a593Smuzhiyun /*
2*4882a593Smuzhiyun ktti.c (c) 1998 Grant R. Guenther <grant@torque.net>
3*4882a593Smuzhiyun Under the terms of the GNU General Public License.
4*4882a593Smuzhiyun
5*4882a593Smuzhiyun ktti.c is a low-level protocol driver for the KT Technology
6*4882a593Smuzhiyun parallel port adapter. This adapter is used in the "PHd"
7*4882a593Smuzhiyun portable hard-drives. As far as I can tell, this device
8*4882a593Smuzhiyun supports 4-bit mode _only_.
9*4882a593Smuzhiyun
10*4882a593Smuzhiyun */
11*4882a593Smuzhiyun
12*4882a593Smuzhiyun #define KTTI_VERSION "1.0"
13*4882a593Smuzhiyun
14*4882a593Smuzhiyun #include <linux/module.h>
15*4882a593Smuzhiyun #include <linux/init.h>
16*4882a593Smuzhiyun #include <linux/delay.h>
17*4882a593Smuzhiyun #include <linux/kernel.h>
18*4882a593Smuzhiyun #include <linux/types.h>
19*4882a593Smuzhiyun #include <linux/wait.h>
20*4882a593Smuzhiyun #include <asm/io.h>
21*4882a593Smuzhiyun
22*4882a593Smuzhiyun #include "paride.h"
23*4882a593Smuzhiyun
24*4882a593Smuzhiyun #define j44(a,b) (((a>>4)&0x0f)|(b&0xf0))
25*4882a593Smuzhiyun
26*4882a593Smuzhiyun /* cont = 0 - access the IDE register file
27*4882a593Smuzhiyun cont = 1 - access the IDE command set
28*4882a593Smuzhiyun */
29*4882a593Smuzhiyun
30*4882a593Smuzhiyun static int cont_map[2] = { 0x10, 0x08 };
31*4882a593Smuzhiyun
ktti_write_regr(PIA * pi,int cont,int regr,int val)32*4882a593Smuzhiyun static void ktti_write_regr( PIA *pi, int cont, int regr, int val)
33*4882a593Smuzhiyun
34*4882a593Smuzhiyun { int r;
35*4882a593Smuzhiyun
36*4882a593Smuzhiyun r = regr + cont_map[cont];
37*4882a593Smuzhiyun
38*4882a593Smuzhiyun w0(r); w2(0xb); w2(0xa); w2(3); w2(6);
39*4882a593Smuzhiyun w0(val); w2(3); w0(0); w2(6); w2(0xb);
40*4882a593Smuzhiyun }
41*4882a593Smuzhiyun
ktti_read_regr(PIA * pi,int cont,int regr)42*4882a593Smuzhiyun static int ktti_read_regr( PIA *pi, int cont, int regr )
43*4882a593Smuzhiyun
44*4882a593Smuzhiyun { int a, b, r;
45*4882a593Smuzhiyun
46*4882a593Smuzhiyun r = regr + cont_map[cont];
47*4882a593Smuzhiyun
48*4882a593Smuzhiyun w0(r); w2(0xb); w2(0xa); w2(9); w2(0xc); w2(9);
49*4882a593Smuzhiyun a = r1(); w2(0xc); b = r1(); w2(9); w2(0xc); w2(9);
50*4882a593Smuzhiyun return j44(a,b);
51*4882a593Smuzhiyun
52*4882a593Smuzhiyun }
53*4882a593Smuzhiyun
ktti_read_block(PIA * pi,char * buf,int count)54*4882a593Smuzhiyun static void ktti_read_block( PIA *pi, char * buf, int count )
55*4882a593Smuzhiyun
56*4882a593Smuzhiyun { int k, a, b;
57*4882a593Smuzhiyun
58*4882a593Smuzhiyun for (k=0;k<count/2;k++) {
59*4882a593Smuzhiyun w0(0x10); w2(0xb); w2(0xa); w2(9); w2(0xc); w2(9);
60*4882a593Smuzhiyun a = r1(); w2(0xc); b = r1(); w2(9);
61*4882a593Smuzhiyun buf[2*k] = j44(a,b);
62*4882a593Smuzhiyun a = r1(); w2(0xc); b = r1(); w2(9);
63*4882a593Smuzhiyun buf[2*k+1] = j44(a,b);
64*4882a593Smuzhiyun }
65*4882a593Smuzhiyun }
66*4882a593Smuzhiyun
ktti_write_block(PIA * pi,char * buf,int count)67*4882a593Smuzhiyun static void ktti_write_block( PIA *pi, char * buf, int count )
68*4882a593Smuzhiyun
69*4882a593Smuzhiyun { int k;
70*4882a593Smuzhiyun
71*4882a593Smuzhiyun for (k=0;k<count/2;k++) {
72*4882a593Smuzhiyun w0(0x10); w2(0xb); w2(0xa); w2(3); w2(6);
73*4882a593Smuzhiyun w0(buf[2*k]); w2(3);
74*4882a593Smuzhiyun w0(buf[2*k+1]); w2(6);
75*4882a593Smuzhiyun w2(0xb);
76*4882a593Smuzhiyun }
77*4882a593Smuzhiyun }
78*4882a593Smuzhiyun
ktti_connect(PIA * pi)79*4882a593Smuzhiyun static void ktti_connect ( PIA *pi )
80*4882a593Smuzhiyun
81*4882a593Smuzhiyun { pi->saved_r0 = r0();
82*4882a593Smuzhiyun pi->saved_r2 = r2();
83*4882a593Smuzhiyun w2(0xb); w2(0xa); w0(0); w2(3); w2(6);
84*4882a593Smuzhiyun }
85*4882a593Smuzhiyun
ktti_disconnect(PIA * pi)86*4882a593Smuzhiyun static void ktti_disconnect ( PIA *pi )
87*4882a593Smuzhiyun
88*4882a593Smuzhiyun { w2(0xb); w2(0xa); w0(0xa0); w2(3); w2(4);
89*4882a593Smuzhiyun w0(pi->saved_r0);
90*4882a593Smuzhiyun w2(pi->saved_r2);
91*4882a593Smuzhiyun }
92*4882a593Smuzhiyun
ktti_log_adapter(PIA * pi,char * scratch,int verbose)93*4882a593Smuzhiyun static void ktti_log_adapter( PIA *pi, char * scratch, int verbose )
94*4882a593Smuzhiyun
95*4882a593Smuzhiyun { printk("%s: ktti %s, KT adapter at 0x%x, delay %d\n",
96*4882a593Smuzhiyun pi->device,KTTI_VERSION,pi->port,pi->delay);
97*4882a593Smuzhiyun
98*4882a593Smuzhiyun }
99*4882a593Smuzhiyun
100*4882a593Smuzhiyun static struct pi_protocol ktti = {
101*4882a593Smuzhiyun .owner = THIS_MODULE,
102*4882a593Smuzhiyun .name = "ktti",
103*4882a593Smuzhiyun .max_mode = 1,
104*4882a593Smuzhiyun .epp_first = 2,
105*4882a593Smuzhiyun .default_delay = 1,
106*4882a593Smuzhiyun .max_units = 1,
107*4882a593Smuzhiyun .write_regr = ktti_write_regr,
108*4882a593Smuzhiyun .read_regr = ktti_read_regr,
109*4882a593Smuzhiyun .write_block = ktti_write_block,
110*4882a593Smuzhiyun .read_block = ktti_read_block,
111*4882a593Smuzhiyun .connect = ktti_connect,
112*4882a593Smuzhiyun .disconnect = ktti_disconnect,
113*4882a593Smuzhiyun .log_adapter = ktti_log_adapter,
114*4882a593Smuzhiyun };
115*4882a593Smuzhiyun
ktti_init(void)116*4882a593Smuzhiyun static int __init ktti_init(void)
117*4882a593Smuzhiyun {
118*4882a593Smuzhiyun return paride_register(&ktti);
119*4882a593Smuzhiyun }
120*4882a593Smuzhiyun
ktti_exit(void)121*4882a593Smuzhiyun static void __exit ktti_exit(void)
122*4882a593Smuzhiyun {
123*4882a593Smuzhiyun paride_unregister(&ktti);
124*4882a593Smuzhiyun }
125*4882a593Smuzhiyun
126*4882a593Smuzhiyun MODULE_LICENSE("GPL");
127*4882a593Smuzhiyun module_init(ktti_init)
128*4882a593Smuzhiyun module_exit(ktti_exit)
129