152 lines
3.2 KiB
C
152 lines
3.2 KiB
C
|
/*
|
||
|
|
fit2.c (c) 1998 Grant R. Guenther <grant@torque.net>
|
||
|
|
Under the terms of the GNU General Public License.
|
||
|
|
|
||
|
|
fit2.c is a low-level protocol driver for the older version
|
||
|
|
of the Fidelity International Technology parallel port adapter.
|
||
|
|
This adapter is used in their TransDisk 2000 and older TransDisk
|
||
|
|
3000 portable hard-drives. As far as I can tell, this device
|
||
|
|
supports 4-bit mode _only_.
|
||
|
|
|
||
|
|
Newer models of the FIT products use an enhanced protocol.
|
||
|
|
The "fit3" protocol module should support current drives.
|
||
|
|
|
||
|
|
*/
|
||
|
|
|
||
|
|
#define FIT2_VERSION "1.0"
|
||
|
|
|
||
|
|
#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"
|
||
|
|
|
||
|
|
#define j44(a,b) (((a>>4)&0x0f)|(b&0xf0))
|
||
|
|
|
||
|
|
/* cont = 0 - access the IDE register file
|
||
|
|
cont = 1 - access the IDE command set
|
||
|
|
|
||
|
|
NB: The FIT adapter does not appear to use the control registers.
|
||
|
|
So, we map ALT_STATUS to STATUS and NO-OP writes to the device
|
||
|
|
control register - this means that IDE reset will not work on these
|
||
|
|
devices.
|
||
|
|
|
||
|
|
*/
|
||
|
|
|
||
|
|
static void fit2_write_regr( PIA *pi, int cont, int regr, int val)
|
||
|
|
|
||
|
|
{ if (cont == 1) return;
|
||
|
|
w2(0xc); w0(regr); w2(4); w0(val); w2(5); w0(0); w2(4);
|
||
|
|
}
|
||
|
|
|
||
|
|
static int fit2_read_regr( PIA *pi, int cont, int regr )
|
||
|
|
|
||
|
|
{ int a, b, r;
|
||
|
|
|
||
|
|
if (cont) {
|
||
|
|
if (regr != 6) return 0xff;
|
||
|
|
r = 7;
|
||
|
|
} else r = regr + 0x10;
|
||
|
|
|
||
|
|
w2(0xc); w0(r); w2(4); w2(5);
|
||
|
|
w0(0); a = r1();
|
||
|
|
w0(1); b = r1();
|
||
|
|
w2(4);
|
||
|
|
|
||
|
|
return j44(a,b);
|
||
|
|
|
||
|
|
}
|
||
|
|
|
||
|
|
static void fit2_read_block( PIA *pi, char * buf, int count )
|
||
|
|
|
||
|
|
{ int k, a, b, c, d;
|
||
|
|
|
||
|
|
w2(0xc); w0(0x10);
|
||
|
|
|
||
|
|
for (k=0;k<count/4;k++) {
|
||
|
|
|
||
|
|
w2(4); w2(5);
|
||
|
|
w0(0); a = r1(); w0(1); b = r1();
|
||
|
|
w0(3); c = r1(); w0(2); d = r1();
|
||
|
|
buf[4*k+0] = j44(a,b);
|
||
|
|
buf[4*k+1] = j44(d,c);
|
||
|
|
|
||
|
|
w2(4); w2(5);
|
||
|
|
a = r1(); w0(3); b = r1();
|
||
|
|
w0(1); c = r1(); w0(0); d = r1();
|
||
|
|
buf[4*k+2] = j44(d,c);
|
||
|
|
buf[4*k+3] = j44(a,b);
|
||
|
|
|
||
|
|
}
|
||
|
|
|
||
|
|
w2(4);
|
||
|
|
|
||
|
|
}
|
||
|
|
|
||
|
|
static void fit2_write_block( PIA *pi, char * buf, int count )
|
||
|
|
|
||
|
|
{ int k;
|
||
|
|
|
||
|
|
|
||
|
|
w2(0xc); w0(0);
|
||
|
|
for (k=0;k<count/2;k++) {
|
||
|
|
w2(4); w0(buf[2*k]);
|
||
|
|
w2(5); w0(buf[2*k+1]);
|
||
|
|
}
|
||
|
|
w2(4);
|
||
|
|
}
|
||
|
|
|
||
|
|
static void fit2_connect ( PIA *pi )
|
||
|
|
|
||
|
|
{ pi->saved_r0 = r0();
|
||
|
|
pi->saved_r2 = r2();
|
||
|
|
w2(0xcc);
|
||
|
|
}
|
||
|
|
|
||
|
|
static void fit2_disconnect ( PIA *pi )
|
||
|
|
|
||
|
|
{ w0(pi->saved_r0);
|
||
|
|
w2(pi->saved_r2);
|
||
|
|
}
|
||
|
|
|
||
|
|
static void fit2_log_adapter( PIA *pi, char * scratch, int verbose )
|
||
|
|
|
||
|
|
{ printk("%s: fit2 %s, FIT 2000 adapter at 0x%x, delay %d\n",
|
||
|
|
pi->device,FIT2_VERSION,pi->port,pi->delay);
|
||
|
|
|
||
|
|
}
|
||
|
|
|
||
|
|
static struct pi_protocol fit2 = {
|
||
|
|
.owner = THIS_MODULE,
|
||
|
|
.name = "fit2",
|
||
|
|
.max_mode = 1,
|
||
|
|
.epp_first = 2,
|
||
|
|
.default_delay = 1,
|
||
|
|
.max_units = 1,
|
||
|
|
.write_regr = fit2_write_regr,
|
||
|
|
.read_regr = fit2_read_regr,
|
||
|
|
.write_block = fit2_write_block,
|
||
|
|
.read_block = fit2_read_block,
|
||
|
|
.connect = fit2_connect,
|
||
|
|
.disconnect = fit2_disconnect,
|
||
|
|
.log_adapter = fit2_log_adapter,
|
||
|
|
};
|
||
|
|
|
||
|
|
static int __init fit2_init(void)
|
||
|
|
{
|
||
|
|
return paride_register(&fit2);
|
||
|
|
}
|
||
|
|
|
||
|
|
static void __exit fit2_exit(void)
|
||
|
|
{
|
||
|
|
paride_unregister(&fit2);
|
||
|
|
}
|
||
|
|
|
||
|
|
MODULE_LICENSE("GPL");
|
||
|
|
module_init(fit2_init)
|
||
|
|
module_exit(fit2_exit)
|