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/*
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 <linux/pata_parport.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(struct pi_adapter *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(struct pi_adapter *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(struct pi_adapter *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(struct pi_adapter *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(struct pi_adapter *pi)
{ pi->saved_r0 = r0();
pi->saved_r2 = r2();
w2(0xcc);
}
static void fit2_disconnect(struct pi_adapter *pi)
{ w0(pi->saved_r0);
w2(pi->saved_r2);
}
static void fit2_log_adapter(struct pi_adapter *pi)
{
dev_info(&pi->dev, "fit2 %s, FIT 2000 adapter at 0x%x, delay %d\n",
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,
};
MODULE_LICENSE("GPL");
module_pata_parport_driver(fit2);
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