2 aten.c (c) 1997-8 Grant R. Guenther <grant@torque.net>
3 Under the terms of the GNU General Public License.
5 aten.c is a low-level protocol driver for the ATEN EH-100
6 parallel port adapter. The EH-100 supports 4-bit and 8-bit
7 modes only. There is also an EH-132 which supports EPP mode
8 transfers. The EH-132 is not yet supported.
14 1.01 GRG 1998.05.05 init_proto, release_proto
18 #define ATEN_VERSION "1.01"
20 #include <linux/module.h>
21 #include <linux/init.h>
22 #include <linux/delay.h>
23 #include <linux/kernel.h>
24 #include <linux/wait.h>
25 #include <linux/types.h>
30 #define j44(a,b) ((((a>>4)&0x0f)|(b&0xf0))^0x88)
32 /* cont = 0 - access the IDE register file
33 cont = 1 - access the IDE command set
36 static int cont_map[2] = { 0x08, 0x20 };
38 static void aten_write_regr( PIA *pi, int cont, int regr, int val)
42 r = regr + cont_map[cont] + 0x80;
44 w0(r); w2(0xe); w2(6); w0(val); w2(7); w2(6); w2(0xc);
47 static int aten_read_regr( PIA *pi, int cont, int regr )
51 r = regr + cont_map[cont] + 0x40;
55 case 0: w0(r); w2(0xe); w2(6);
57 a = r1(); w0(0x10); b = r1(); w2(0xc);
61 w0(r); w2(0xe); w2(6); w0(0xff);
62 w2(0x27); w2(0x26); w2(0x20);
70 static void aten_read_block( PIA *pi, char * buf, int count )
76 case 0: w0(0x48); w2(0xe); w2(6);
77 for (k=0;k<count/2;k++) {
79 a = r1(); w0(0x58); b = r1();
80 w2(0); d = r1(); w0(0x48); c = r1();
82 buf[2*k+1] = j44(a,b);
87 case 1: w0(0x58); w2(0xe); w2(6);
88 for (k=0;k<count/2;k++) {
89 w2(0x27); w2(0x26); w2(0x22);
90 a = r0(); w2(0x20); b = r0();
91 buf[2*k] = b; buf[2*k+1] = a;
98 static void aten_write_block( PIA *pi, char * buf, int count )
102 w0(0x88); w2(0xe); w2(6);
103 for (k=0;k<count/2;k++) {
104 w0(buf[2*k+1]); w2(0xe); w2(6);
105 w0(buf[2*k]); w2(7); w2(6);
110 static void aten_connect ( PIA *pi )
112 { pi->saved_r0 = r0();
117 static void aten_disconnect ( PIA *pi )
123 static void aten_log_adapter( PIA *pi, char * scratch, int verbose )
125 { char *mode_string[2] = {"4-bit","8-bit"};
127 printk("%s: aten %s, ATEN EH-100 at 0x%x, ",
128 pi->device,ATEN_VERSION,pi->port);
129 printk("mode %d (%s), delay %d\n",pi->mode,
130 mode_string[pi->mode],pi->delay);
134 static struct pi_protocol aten = {
135 .owner = THIS_MODULE,
141 .write_regr = aten_write_regr,
142 .read_regr = aten_read_regr,
143 .write_block = aten_write_block,
144 .read_block = aten_read_block,
145 .connect = aten_connect,
146 .disconnect = aten_disconnect,
147 .log_adapter = aten_log_adapter,
150 static int __init aten_init(void)
152 return paride_register(&aten);
155 static void __exit aten_exit(void)
157 paride_unregister( &aten );
160 MODULE_LICENSE("GPL");
161 module_init(aten_init)
162 module_exit(aten_exit)