320 lines
7.4 KiB
C
Executable file
320 lines
7.4 KiB
C
Executable file
/*
|
|
on26.c (c) 1997-8 Grant R. Guenther <grant@torque.net>
|
|
Under the terms of the GNU General Public License.
|
|
|
|
on26.c is a low-level protocol driver for the
|
|
OnSpec 90c26 parallel to IDE adapter chip.
|
|
|
|
*/
|
|
|
|
/* Changes:
|
|
|
|
1.01 GRG 1998.05.06 init_proto, release_proto
|
|
1.02 GRG 1998.09.23 updates for the -E rev chip
|
|
1.03 GRG 1998.12.14 fix for slave drives
|
|
1.04 GRG 1998.12.20 yet another bug fix
|
|
|
|
*/
|
|
|
|
#define ON26_VERSION "1.04"
|
|
|
|
#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"
|
|
|
|
/* mode codes: 0 nybble reads, 8-bit writes
|
|
1 8-bit reads and writes
|
|
2 8-bit EPP mode
|
|
3 EPP-16
|
|
4 EPP-32
|
|
*/
|
|
|
|
#define j44(a,b) (((a>>4)&0x0f)|(b&0xf0))
|
|
|
|
#define P1 w2(5);w2(0xd);w2(5);w2(0xd);w2(5);w2(4);
|
|
#define P2 w2(5);w2(7);w2(5);w2(4);
|
|
|
|
/* cont = 0 - access the IDE register file
|
|
cont = 1 - access the IDE command set
|
|
*/
|
|
|
|
static int on26_read_regr( PIA *pi, int cont, int regr )
|
|
|
|
{ int a, b, r;
|
|
|
|
r = (regr<<2) + 1 + cont;
|
|
|
|
switch (pi->mode) {
|
|
|
|
case 0: w0(1); P1; w0(r); P2; w0(0); P1;
|
|
w2(6); a = r1(); w2(4);
|
|
w2(6); b = r1(); w2(4);
|
|
w2(6); w2(4); w2(6); w2(4);
|
|
return j44(a,b);
|
|
|
|
case 1: w0(1); P1; w0(r); P2; w0(0); P1;
|
|
w2(0x26); a = r0(); w2(4); w2(0x26); w2(4);
|
|
return a;
|
|
|
|
case 2:
|
|
case 3:
|
|
case 4: w3(1); w3(1); w2(5); w4(r); w2(4);
|
|
w3(0); w3(0); w2(0x24); a = r4(); w2(4);
|
|
w2(0x24); (void)r4(); w2(4);
|
|
return a;
|
|
|
|
}
|
|
return -1;
|
|
}
|
|
|
|
static void on26_write_regr( PIA *pi, int cont, int regr, int val )
|
|
|
|
{ int r;
|
|
|
|
r = (regr<<2) + 1 + cont;
|
|
|
|
switch (pi->mode) {
|
|
|
|
case 0:
|
|
case 1: w0(1); P1; w0(r); P2; w0(0); P1;
|
|
w0(val); P2; w0(val); P2;
|
|
break;
|
|
|
|
case 2:
|
|
case 3:
|
|
case 4: w3(1); w3(1); w2(5); w4(r); w2(4);
|
|
w3(0); w3(0);
|
|
w2(5); w4(val); w2(4);
|
|
w2(5); w4(val); w2(4);
|
|
break;
|
|
}
|
|
}
|
|
|
|
#define CCP(x) w0(0xfe);w0(0xaa);w0(0x55);w0(0);w0(0xff);\
|
|
w0(0x87);w0(0x78);w0(x);w2(4);w2(5);w2(4);w0(0xff);
|
|
|
|
static void on26_connect ( PIA *pi )
|
|
|
|
{ int x;
|
|
|
|
pi->saved_r0 = r0();
|
|
pi->saved_r2 = r2();
|
|
|
|
CCP(0x20);
|
|
x = 8; if (pi->mode) x = 9;
|
|
|
|
w0(2); P1; w0(8); P2;
|
|
w0(2); P1; w0(x); P2;
|
|
}
|
|
|
|
static void on26_disconnect ( PIA *pi )
|
|
|
|
{ if (pi->mode >= 2) { w3(4); w3(4); w3(4); w3(4); }
|
|
else { w0(4); P1; w0(4); P1; }
|
|
CCP(0x30);
|
|
w0(pi->saved_r0);
|
|
w2(pi->saved_r2);
|
|
}
|
|
|
|
#define RESET_WAIT 200
|
|
|
|
static int on26_test_port( PIA *pi) /* hard reset */
|
|
|
|
{ int i, m, d, x=0, y=0;
|
|
|
|
pi->saved_r0 = r0();
|
|
pi->saved_r2 = r2();
|
|
|
|
d = pi->delay;
|
|
m = pi->mode;
|
|
pi->delay = 5;
|
|
pi->mode = 0;
|
|
|
|
w2(0xc);
|
|
|
|
CCP(0x30); CCP(0);
|
|
|
|
w0(0xfe);w0(0xaa);w0(0x55);w0(0);w0(0xff);
|
|
i = ((r1() & 0xf0) << 4); w0(0x87);
|
|
i |= (r1() & 0xf0); w0(0x78);
|
|
w0(0x20);w2(4);w2(5);
|
|
i |= ((r1() & 0xf0) >> 4);
|
|
w2(4);w0(0xff);
|
|
|
|
if (i == 0xb5f) {
|
|
|
|
w0(2); P1; w0(0); P2;
|
|
w0(3); P1; w0(0); P2;
|
|
w0(2); P1; w0(8); P2; udelay(100);
|
|
w0(2); P1; w0(0xa); P2; udelay(100);
|
|
w0(2); P1; w0(8); P2; udelay(1000);
|
|
|
|
on26_write_regr(pi,0,6,0xa0);
|
|
|
|
for (i=0;i<RESET_WAIT;i++) {
|
|
on26_write_regr(pi,0,6,0xa0);
|
|
x = on26_read_regr(pi,0,7);
|
|
on26_write_regr(pi,0,6,0xb0);
|
|
y = on26_read_regr(pi,0,7);
|
|
if (!((x&0x80)||(y&0x80))) break;
|
|
mdelay(100);
|
|
}
|
|
|
|
if (i == RESET_WAIT)
|
|
printk("on26: Device reset failed (%x,%x)\n",x,y);
|
|
|
|
w0(4); P1; w0(4); P1;
|
|
}
|
|
|
|
CCP(0x30);
|
|
|
|
pi->delay = d;
|
|
pi->mode = m;
|
|
w0(pi->saved_r0);
|
|
w2(pi->saved_r2);
|
|
|
|
return 5;
|
|
}
|
|
|
|
|
|
static void on26_read_block( PIA *pi, char * buf, int count )
|
|
|
|
{ int k, a, b;
|
|
|
|
switch (pi->mode) {
|
|
|
|
case 0: w0(1); P1; w0(1); P2; w0(2); P1; w0(0x18); P2; w0(0); P1;
|
|
udelay(10);
|
|
for (k=0;k<count;k++) {
|
|
w2(6); a = r1();
|
|
w2(4); b = r1();
|
|
buf[k] = j44(a,b);
|
|
}
|
|
w0(2); P1; w0(8); P2;
|
|
break;
|
|
|
|
case 1: w0(1); P1; w0(1); P2; w0(2); P1; w0(0x19); P2; w0(0); P1;
|
|
udelay(10);
|
|
for (k=0;k<count/2;k++) {
|
|
w2(0x26); buf[2*k] = r0();
|
|
w2(0x24); buf[2*k+1] = r0();
|
|
}
|
|
w0(2); P1; w0(9); P2;
|
|
break;
|
|
|
|
case 2: w3(1); w3(1); w2(5); w4(1); w2(4);
|
|
w3(0); w3(0); w2(0x24);
|
|
udelay(10);
|
|
for (k=0;k<count;k++) buf[k] = r4();
|
|
w2(4);
|
|
break;
|
|
|
|
case 3: w3(1); w3(1); w2(5); w4(1); w2(4);
|
|
w3(0); w3(0); w2(0x24);
|
|
udelay(10);
|
|
for (k=0;k<count/2;k++) ((u16 *)buf)[k] = r4w();
|
|
w2(4);
|
|
break;
|
|
|
|
case 4: w3(1); w3(1); w2(5); w4(1); w2(4);
|
|
w3(0); w3(0); w2(0x24);
|
|
udelay(10);
|
|
for (k=0;k<count/4;k++) ((u32 *)buf)[k] = r4l();
|
|
w2(4);
|
|
break;
|
|
|
|
}
|
|
}
|
|
|
|
static void on26_write_block( PIA *pi, char * buf, int count )
|
|
|
|
{ int k;
|
|
|
|
switch (pi->mode) {
|
|
|
|
case 0:
|
|
case 1: w0(1); P1; w0(1); P2;
|
|
w0(2); P1; w0(0x18+pi->mode); P2; w0(0); P1;
|
|
udelay(10);
|
|
for (k=0;k<count/2;k++) {
|
|
w2(5); w0(buf[2*k]);
|
|
w2(7); w0(buf[2*k+1]);
|
|
}
|
|
w2(5); w2(4);
|
|
w0(2); P1; w0(8+pi->mode); P2;
|
|
break;
|
|
|
|
case 2: w3(1); w3(1); w2(5); w4(1); w2(4);
|
|
w3(0); w3(0); w2(0xc5);
|
|
udelay(10);
|
|
for (k=0;k<count;k++) w4(buf[k]);
|
|
w2(0xc4);
|
|
break;
|
|
|
|
case 3: w3(1); w3(1); w2(5); w4(1); w2(4);
|
|
w3(0); w3(0); w2(0xc5);
|
|
udelay(10);
|
|
for (k=0;k<count/2;k++) w4w(((u16 *)buf)[k]);
|
|
w2(0xc4);
|
|
break;
|
|
|
|
case 4: w3(1); w3(1); w2(5); w4(1); w2(4);
|
|
w3(0); w3(0); w2(0xc5);
|
|
udelay(10);
|
|
for (k=0;k<count/4;k++) w4l(((u32 *)buf)[k]);
|
|
w2(0xc4);
|
|
break;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
static void on26_log_adapter( PIA *pi, char * scratch, int verbose )
|
|
|
|
{ char *mode_string[5] = {"4-bit","8-bit","EPP-8",
|
|
"EPP-16","EPP-32"};
|
|
|
|
printk("%s: on26 %s, OnSpec 90c26 at 0x%x, ",
|
|
pi->device,ON26_VERSION,pi->port);
|
|
printk("mode %d (%s), delay %d\n",pi->mode,
|
|
mode_string[pi->mode],pi->delay);
|
|
|
|
}
|
|
|
|
static struct pi_protocol on26 = {
|
|
.owner = THIS_MODULE,
|
|
.name = "on26",
|
|
.max_mode = 5,
|
|
.epp_first = 2,
|
|
.default_delay = 1,
|
|
.max_units = 1,
|
|
.write_regr = on26_write_regr,
|
|
.read_regr = on26_read_regr,
|
|
.write_block = on26_write_block,
|
|
.read_block = on26_read_block,
|
|
.connect = on26_connect,
|
|
.disconnect = on26_disconnect,
|
|
.test_port = on26_test_port,
|
|
.log_adapter = on26_log_adapter,
|
|
};
|
|
|
|
static int __init on26_init(void)
|
|
{
|
|
return paride_register(&on26);
|
|
}
|
|
|
|
static void __exit on26_exit(void)
|
|
{
|
|
paride_unregister(&on26);
|
|
}
|
|
|
|
MODULE_LICENSE("GPL");
|
|
module_init(on26_init)
|
|
module_exit(on26_exit)
|