blob: 117ab0e8ccf0afc9156f500d795487fbfd1f4894 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 ktti.c (c) 1998 Grant R. Guenther <grant@torque.net>
3 Under the terms of the GNU General Public License.
4
5 ktti.c is a low-level protocol driver for the KT Technology
6 parallel port adapter. This adapter is used in the "PHd"
7 portable hard-drives. As far as I can tell, this device
8 supports 4-bit mode _only_.
9
10*/
11
12#define KTTI_VERSION "1.0"
13
14#include <linux/module.h>
15#include <linux/init.h>
16#include <linux/delay.h>
17#include <linux/kernel.h>
18#include <linux/types.h>
19#include <linux/wait.h>
20#include <asm/io.h>
21
22#include "paride.h"
23
24#define j44(a,b) (((a>>4)&0x0f)|(b&0xf0))
25
26/* cont = 0 - access the IDE register file
27 cont = 1 - access the IDE command set
28*/
29
30static int cont_map[2] = { 0x10, 0x08 };
31
32static void ktti_write_regr( PIA *pi, int cont, int regr, int val)
33
34{ int r;
35
36 r = regr + cont_map[cont];
37
38 w0(r); w2(0xb); w2(0xa); w2(3); w2(6);
39 w0(val); w2(3); w0(0); w2(6); w2(0xb);
40}
41
42static int ktti_read_regr( PIA *pi, int cont, int regr )
43
44{ int a, b, r;
45
46 r = regr + cont_map[cont];
47
48 w0(r); w2(0xb); w2(0xa); w2(9); w2(0xc); w2(9);
49 a = r1(); w2(0xc); b = r1(); w2(9); w2(0xc); w2(9);
50 return j44(a,b);
51
52}
53
54static void ktti_read_block( PIA *pi, char * buf, int count )
55
56{ int k, a, b;
57
58 for (k=0;k<count/2;k++) {
59 w0(0x10); w2(0xb); w2(0xa); w2(9); w2(0xc); w2(9);
60 a = r1(); w2(0xc); b = r1(); w2(9);
61 buf[2*k] = j44(a,b);
62 a = r1(); w2(0xc); b = r1(); w2(9);
63 buf[2*k+1] = j44(a,b);
64 }
65}
66
67static void ktti_write_block( PIA *pi, char * buf, int count )
68
69{ int k;
70
71 for (k=0;k<count/2;k++) {
72 w0(0x10); w2(0xb); w2(0xa); w2(3); w2(6);
73 w0(buf[2*k]); w2(3);
74 w0(buf[2*k+1]); w2(6);
75 w2(0xb);
76 }
77}
78
79static void ktti_connect ( PIA *pi )
80
81{ pi->saved_r0 = r0();
82 pi->saved_r2 = r2();
83 w2(0xb); w2(0xa); w0(0); w2(3); w2(6);
84}
85
86static void ktti_disconnect ( PIA *pi )
87
88{ w2(0xb); w2(0xa); w0(0xa0); w2(3); w2(4);
89 w0(pi->saved_r0);
90 w2(pi->saved_r2);
91}
92
93static void ktti_log_adapter( PIA *pi, char * scratch, int verbose )
94
95{ printk("%s: ktti %s, KT adapter at 0x%x, delay %d\n",
96 pi->device,KTTI_VERSION,pi->port,pi->delay);
97
98}
99
100static struct pi_protocol ktti = {
101 .owner = THIS_MODULE,
102 .name = "ktti",
103 .max_mode = 1,
104 .epp_first = 2,
105 .default_delay = 1,
106 .max_units = 1,
107 .write_regr = ktti_write_regr,
108 .read_regr = ktti_read_regr,
109 .write_block = ktti_write_block,
110 .read_block = ktti_read_block,
111 .connect = ktti_connect,
112 .disconnect = ktti_disconnect,
113 .log_adapter = ktti_log_adapter,
114};
115
116static int __init ktti_init(void)
117{
Alexey Dobriyanb4178ab2006-12-06 20:36:21 -0800118 return paride_register(&ktti);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700119}
120
121static void __exit ktti_exit(void)
122{
Alexey Dobriyanf4330002006-12-06 20:36:20 -0800123 paride_unregister(&ktti);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700124}
125
126MODULE_LICENSE("GPL");
127module_init(ktti_init)
128module_exit(ktti_exit)