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1da177e4 LT |
1 | /* |
2 | fit2.c (c) 1998 Grant R. Guenther <grant@torque.net> | |
3 | Under the terms of the GNU General Public License. | |
4 | ||
5 | fit2.c is a low-level protocol driver for the older version | |
6 | of the Fidelity International Technology parallel port adapter. | |
7 | This adapter is used in their TransDisk 2000 and older TransDisk | |
8 | 3000 portable hard-drives. As far as I can tell, this device | |
9 | supports 4-bit mode _only_. | |
10 | ||
11 | Newer models of the FIT products use an enhanced protocol. | |
12 | The "fit3" protocol module should support current drives. | |
13 | ||
14 | */ | |
15 | ||
16 | #define FIT2_VERSION "1.0" | |
17 | ||
18 | #include <linux/module.h> | |
19 | #include <linux/init.h> | |
20 | #include <linux/delay.h> | |
21 | #include <linux/kernel.h> | |
22 | #include <linux/types.h> | |
23 | #include <linux/wait.h> | |
24 | #include <asm/io.h> | |
25 | ||
26 | #include "paride.h" | |
27 | ||
28 | #define j44(a,b) (((a>>4)&0x0f)|(b&0xf0)) | |
29 | ||
30 | /* cont = 0 - access the IDE register file | |
31 | cont = 1 - access the IDE command set | |
32 | ||
33 | NB: The FIT adapter does not appear to use the control registers. | |
34 | So, we map ALT_STATUS to STATUS and NO-OP writes to the device | |
35 | control register - this means that IDE reset will not work on these | |
36 | devices. | |
37 | ||
38 | */ | |
39 | ||
40 | static void fit2_write_regr( PIA *pi, int cont, int regr, int val) | |
41 | ||
42 | { if (cont == 1) return; | |
43 | w2(0xc); w0(regr); w2(4); w0(val); w2(5); w0(0); w2(4); | |
44 | } | |
45 | ||
46 | static int fit2_read_regr( PIA *pi, int cont, int regr ) | |
47 | ||
48 | { int a, b, r; | |
49 | ||
50 | if (cont) { | |
51 | if (regr != 6) return 0xff; | |
52 | r = 7; | |
53 | } else r = regr + 0x10; | |
54 | ||
55 | w2(0xc); w0(r); w2(4); w2(5); | |
56 | w0(0); a = r1(); | |
57 | w0(1); b = r1(); | |
58 | w2(4); | |
59 | ||
60 | return j44(a,b); | |
61 | ||
62 | } | |
63 | ||
64 | static void fit2_read_block( PIA *pi, char * buf, int count ) | |
65 | ||
66 | { int k, a, b, c, d; | |
67 | ||
68 | w2(0xc); w0(0x10); | |
69 | ||
70 | for (k=0;k<count/4;k++) { | |
71 | ||
72 | w2(4); w2(5); | |
73 | w0(0); a = r1(); w0(1); b = r1(); | |
74 | w0(3); c = r1(); w0(2); d = r1(); | |
75 | buf[4*k+0] = j44(a,b); | |
76 | buf[4*k+1] = j44(d,c); | |
77 | ||
78 | w2(4); w2(5); | |
79 | a = r1(); w0(3); b = r1(); | |
80 | w0(1); c = r1(); w0(0); d = r1(); | |
81 | buf[4*k+2] = j44(d,c); | |
82 | buf[4*k+3] = j44(a,b); | |
83 | ||
84 | } | |
85 | ||
86 | w2(4); | |
87 | ||
88 | } | |
89 | ||
90 | static void fit2_write_block( PIA *pi, char * buf, int count ) | |
91 | ||
92 | { int k; | |
93 | ||
94 | ||
95 | w2(0xc); w0(0); | |
96 | for (k=0;k<count/2;k++) { | |
97 | w2(4); w0(buf[2*k]); | |
98 | w2(5); w0(buf[2*k+1]); | |
99 | } | |
100 | w2(4); | |
101 | } | |
102 | ||
103 | static void fit2_connect ( PIA *pi ) | |
104 | ||
105 | { pi->saved_r0 = r0(); | |
106 | pi->saved_r2 = r2(); | |
107 | w2(0xcc); | |
108 | } | |
109 | ||
110 | static void fit2_disconnect ( PIA *pi ) | |
111 | ||
112 | { w0(pi->saved_r0); | |
113 | w2(pi->saved_r2); | |
114 | } | |
115 | ||
116 | static void fit2_log_adapter( PIA *pi, char * scratch, int verbose ) | |
117 | ||
118 | { printk("%s: fit2 %s, FIT 2000 adapter at 0x%x, delay %d\n", | |
119 | pi->device,FIT2_VERSION,pi->port,pi->delay); | |
120 | ||
121 | } | |
122 | ||
123 | static struct pi_protocol fit2 = { | |
124 | .owner = THIS_MODULE, | |
125 | .name = "fit2", | |
126 | .max_mode = 1, | |
127 | .epp_first = 2, | |
128 | .default_delay = 1, | |
129 | .max_units = 1, | |
130 | .write_regr = fit2_write_regr, | |
131 | .read_regr = fit2_read_regr, | |
132 | .write_block = fit2_write_block, | |
133 | .read_block = fit2_read_block, | |
134 | .connect = fit2_connect, | |
135 | .disconnect = fit2_disconnect, | |
136 | .log_adapter = fit2_log_adapter, | |
137 | }; | |
138 | ||
139 | static int __init fit2_init(void) | |
140 | { | |
b4178ab5 | 141 | return paride_register(&fit2); |
1da177e4 LT |
142 | } |
143 | ||
144 | static void __exit fit2_exit(void) | |
145 | { | |
f4330002 | 146 | paride_unregister(&fit2); |
1da177e4 LT |
147 | } |
148 | ||
149 | MODULE_LICENSE("GPL"); | |
150 | module_init(fit2_init) | |
151 | module_exit(fit2_exit) |