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/*
fit3.c (c) 1998 Grant R. Guenther <grant@torque.net>
Under the terms of the GNU General Public License.
fit3.c is a low-level protocol driver for newer models
of the Fidelity International Technology parallel port adapter.
This adapter is used in their TransDisk 3000 portable
hard-drives, as well as CD-ROM, PD-CD and other devices.
The TD-2000 and certain older devices use a different protocol.
Try the fit2 protocol module with them.
NB: The FIT adapters do not appear to support 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.
*/
#define FIT3_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 <linux/pata_parport.h>
#define j44(a,b) (((a>>3)&0x0f)|((b<<1)&0xf0))
#define w7(byte) {out_p(7,byte);}
#define r7() (in_p(7) & 0xff)
/* cont = 0 - access the IDE register file
cont = 1 - access the IDE command set
*/
static void fit3_write_regr(struct pi_adapter *pi, int cont, int regr, int val)
{ if (cont == 1) return;
switch (pi->mode) {
case 0:
case 1: w2(0xc); w0(regr); w2(0x8); w2(0xc);
w0(val); w2(0xd);
w0(0); w2(0xc);
break;
case 2: w2(0xc); w0(regr); w2(0x8); w2(0xc);
w4(val); w4(0);
w2(0xc);
break;
}
}
static int fit3_read_regr(struct pi_adapter *pi, int cont, int regr)
{ int a, b;
if (cont) {
if (regr != 6) return 0xff;
regr = 7;
}
switch (pi->mode) {
case 0: w2(0xc); w0(regr + 0x10); w2(0x8); w2(0xc);
w2(0xd); a = r1();
w2(0xf); b = r1();
w2(0xc);
return j44(a,b);
case 1: w2(0xc); w0(regr + 0x90); w2(0x8); w2(0xc);
w2(0xec); w2(0xee); w2(0xef); a = r0();
w2(0xc);
return a;
case 2: w2(0xc); w0(regr + 0x90); w2(0x8); w2(0xc);
w2(0xec);
a = r4(); b = r4();
w2(0xc);
return a;
}
return -1;
}
static void fit3_read_block(struct pi_adapter *pi, char *buf, int count)
{ int k, a, b, c, d;
switch (pi->mode) {
case 0: w2(0xc); w0(0x10); w2(0x8); w2(0xc);
for (k=0;k<count/2;k++) {
w2(0xd); a = r1();
w2(0xf); b = r1();
w2(0xc); c = r1();
w2(0xe); d = r1();
buf[2*k ] = j44(a,b);
buf[2*k+1] = j44(c,d);
}
w2(0xc);
break;
case 1: w2(0xc); w0(0x90); w2(0x8); w2(0xc);
w2(0xec); w2(0xee);
for (k=0;k<count/2;k++) {
w2(0xef); a = r0();
w2(0xee); b = r0();
buf[2*k ] = a;
buf[2*k+1] = b;
}
w2(0xec);
w2(0xc);
break;
case 2: w2(0xc); w0(0x90); w2(0x8); w2(0xc);
w2(0xec);
for (k=0;k<count;k++) buf[k] = r4();
w2(0xc);
break;
}
}
static void fit3_write_block(struct pi_adapter *pi, char *buf, int count)
{ int k;
switch (pi->mode) {
case 0:
case 1: w2(0xc); w0(0); w2(0x8); w2(0xc);
for (k=0;k<count/2;k++) {
w0(buf[2*k ]); w2(0xd);
w0(buf[2*k+1]); w2(0xc);
}
break;
case 2: w2(0xc); w0(0); w2(0x8); w2(0xc);
for (k=0;k<count;k++) w4(buf[k]);
w2(0xc);
break;
}
}
static void fit3_connect(struct pi_adapter *pi)
{ pi->saved_r0 = r0();
pi->saved_r2 = r2();
w2(0xc); w0(0); w2(0xa);
if (pi->mode == 2) {
w2(0xc); w0(0x9); w2(0x8); w2(0xc);
}
}
static void fit3_disconnect(struct pi_adapter *pi)
{ w2(0xc); w0(0xa); w2(0x8); w2(0xc);
w0(pi->saved_r0);
w2(pi->saved_r2);
}
static void fit3_log_adapter(struct pi_adapter *pi, char *scratch)
{ char *mode_string[3] = {"4-bit","8-bit","EPP"};
printk("fit3 %s, FIT 3000 adapter at 0x%x, "
"mode %d (%s), delay %d\n",
FIT3_VERSION, pi->port,
pi->mode,mode_string[pi->mode],pi->delay);
}
static struct pi_protocol fit3 = {
.owner = THIS_MODULE,
.name = "fit3",
.max_mode = 3,
.epp_first = 2,
.default_delay = 1,
.max_units = 1,
.write_regr = fit3_write_regr,
.read_regr = fit3_read_regr,
.write_block = fit3_write_block,
.read_block = fit3_read_block,
.connect = fit3_connect,
.disconnect = fit3_disconnect,
.log_adapter = fit3_log_adapter,
};
MODULE_LICENSE("GPL");
module_pata_parport_driver(fit3);
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