mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-11-11 12:28:41 +08:00
cec148c247
Most of the protocol modules for the pata_parport driver are missing a module description, causing warnings such as: WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/ata/pata_parport/aten.o when compiling with W=1. Add the missing MODULE_DESCRIPTION() definitions to avoid these warnings. While at it, also add the missing MODULE_AUTHOR() definitions. Signed-off-by: Damien Le Moal <dlemoal@kernel.org>
366 lines
7.0 KiB
C
366 lines
7.0 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
|
|
/*
|
|
* (c) 1997-1998 Grant R. Guenther <grant@torque.net>
|
|
*
|
|
* This is the low level protocol driver for the EPAT parallel
|
|
* to IDE adapter from Shuttle Technologies. This adapter is
|
|
* used in many popular parallel port disk products such as the
|
|
* SyQuest EZ drives, the Avatar Shark and the Imation SuperDisk.
|
|
*/
|
|
|
|
#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 "pata_parport.h"
|
|
|
|
#define j44(a, b) (((a >> 4) & 0x0f) + (b & 0xf0))
|
|
#define j53(a, b) (((a >> 3) & 0x1f) + ((b << 4) & 0xe0))
|
|
|
|
static int epatc8;
|
|
|
|
module_param(epatc8, int, 0);
|
|
MODULE_PARM_DESC(epatc8,
|
|
"support for the Shuttle EP1284 chip, "
|
|
"used in any recent Imation SuperDisk (LS-120) drive.");
|
|
|
|
/*
|
|
* cont = 0 IDE register file
|
|
* cont = 1 IDE control registers
|
|
* cont = 2 internal EPAT registers
|
|
*/
|
|
static int cont_map[3] = { 0x18, 0x10, 0 };
|
|
|
|
static void epat_write_regr(struct pi_adapter *pi, int cont, int regr, int val)
|
|
{
|
|
int r = regr + cont_map[cont];
|
|
|
|
switch (pi->mode) {
|
|
case 0:
|
|
case 1:
|
|
case 2:
|
|
w0(0x60+r); w2(1); w0(val); w2(4);
|
|
break;
|
|
case 3:
|
|
case 4:
|
|
case 5:
|
|
w3(0x40+r); w4(val);
|
|
break;
|
|
}
|
|
}
|
|
|
|
static int epat_read_regr(struct pi_adapter *pi, int cont, int regr)
|
|
{
|
|
int a, b, r;
|
|
|
|
r = regr + cont_map[cont];
|
|
|
|
switch (pi->mode) {
|
|
|
|
case 0:
|
|
w0(r); w2(1); w2(3);
|
|
a = r1(); w2(4); b = r1();
|
|
return j44(a, b);
|
|
case 1:
|
|
w0(0x40+r); w2(1); w2(4);
|
|
a = r1(); b = r2(); w0(0xff);
|
|
return j53(a, b);
|
|
case 2:
|
|
w0(0x20+r); w2(1); w2(0x25);
|
|
a = r0(); w2(4);
|
|
return a;
|
|
case 3:
|
|
case 4:
|
|
case 5:
|
|
w3(r); w2(0x24); a = r4(); w2(4);
|
|
return a;
|
|
}
|
|
|
|
return -1; /* never gets here */
|
|
}
|
|
|
|
static void epat_read_block(struct pi_adapter *pi, char *buf, int count)
|
|
{
|
|
int k, ph, a, b;
|
|
|
|
switch (pi->mode) {
|
|
|
|
case 0:
|
|
w0(7); w2(1); w2(3); w0(0xff);
|
|
ph = 0;
|
|
for (k = 0; k < count; k++) {
|
|
if (k == count-1)
|
|
w0(0xfd);
|
|
w2(6 + ph); a = r1();
|
|
if (a & 8) {
|
|
b = a;
|
|
} else {
|
|
w2(4+ph); b = r1();
|
|
}
|
|
buf[k] = j44(a, b);
|
|
ph = 1 - ph;
|
|
}
|
|
w0(0); w2(4);
|
|
break;
|
|
|
|
case 1:
|
|
w0(0x47); w2(1); w2(5); w0(0xff);
|
|
ph = 0;
|
|
for (k = 0; k < count; k++) {
|
|
if (k == count - 1)
|
|
w0(0xfd);
|
|
w2(4 + ph);
|
|
a = r1(); b = r2();
|
|
buf[k] = j53(a, b);
|
|
ph = 1 - ph;
|
|
}
|
|
w0(0); w2(4);
|
|
break;
|
|
|
|
case 2:
|
|
w0(0x27); w2(1); w2(0x25); w0(0);
|
|
ph = 0;
|
|
for (k = 0; k < count - 1; k++) {
|
|
w2(0x24 + ph);
|
|
buf[k] = r0();
|
|
ph = 1 - ph;
|
|
}
|
|
w2(0x26); w2(0x27);
|
|
buf[count - 1] = r0();
|
|
w2(0x25); w2(4);
|
|
break;
|
|
|
|
case 3:
|
|
w3(0x80); w2(0x24);
|
|
for (k = 0; k < count - 1; k++)
|
|
buf[k] = r4();
|
|
w2(4); w3(0xa0); w2(0x24);
|
|
buf[count - 1] = r4();
|
|
w2(4);
|
|
break;
|
|
|
|
case 4:
|
|
w3(0x80); w2(0x24);
|
|
for (k = 0; k < count / 2 - 1; k++)
|
|
((u16 *)buf)[k] = r4w();
|
|
buf[count - 2] = r4();
|
|
w2(4); w3(0xa0); w2(0x24);
|
|
buf[count - 1] = r4();
|
|
w2(4);
|
|
break;
|
|
|
|
case 5:
|
|
w3(0x80); w2(0x24);
|
|
for (k = 0; k < count / 4 - 1; k++)
|
|
((u32 *)buf)[k] = r4l();
|
|
for (k = count - 4; k < count - 1; k++)
|
|
buf[k] = r4();
|
|
w2(4); w3(0xa0); w2(0x24);
|
|
buf[count - 1] = r4();
|
|
w2(4);
|
|
break;
|
|
}
|
|
}
|
|
|
|
static void epat_write_block(struct pi_adapter *pi, char *buf, int count)
|
|
{
|
|
int ph, k;
|
|
|
|
switch (pi->mode) {
|
|
case 0:
|
|
case 1:
|
|
case 2:
|
|
w0(0x67); w2(1); w2(5);
|
|
ph = 0;
|
|
for (k = 0; k < count; k++) {
|
|
w0(buf[k]);
|
|
w2(4 + ph);
|
|
ph = 1 - ph;
|
|
}
|
|
w2(7); w2(4);
|
|
break;
|
|
case 3:
|
|
w3(0xc0);
|
|
for (k = 0; k < count; k++)
|
|
w4(buf[k]);
|
|
w2(4);
|
|
break;
|
|
case 4:
|
|
w3(0xc0);
|
|
for (k = 0; k < count / 2; k++)
|
|
w4w(((u16 *)buf)[k]);
|
|
w2(4);
|
|
break;
|
|
case 5:
|
|
w3(0xc0);
|
|
for (k = 0; k < count / 4; k++)
|
|
w4l(((u32 *)buf)[k]);
|
|
w2(4);
|
|
break;
|
|
}
|
|
}
|
|
|
|
/* these macros access the EPAT registers in native addressing */
|
|
|
|
#define WR(r, v) epat_write_regr(pi, 2, r, v)
|
|
#define RR(r) epat_read_regr(pi, 2, r)
|
|
|
|
/* and these access the IDE task file */
|
|
|
|
#define WRi(r, v) epat_write_regr(pi, 0, r, v)
|
|
#define RRi(r) epat_read_regr(pi, 0, r)
|
|
|
|
/* FIXME: the CPP stuff should be fixed to handle multiple EPATs on a chain */
|
|
|
|
#define CPP(x) \
|
|
do { \
|
|
w2(4); w0(0x22); w0(0xaa); \
|
|
w0(0x55); w0(0); w0(0xff); \
|
|
w0(0x87); w0(0x78); w0(x); \
|
|
w2(4); w2(5); w2(4); w0(0xff); \
|
|
} while (0)
|
|
|
|
static void epat_connect(struct pi_adapter *pi)
|
|
{
|
|
pi->saved_r0 = r0();
|
|
pi->saved_r2 = r2();
|
|
|
|
/* Initialize the chip */
|
|
CPP(0);
|
|
|
|
if (epatc8) {
|
|
CPP(0x40); CPP(0xe0);
|
|
w0(0); w2(1); w2(4);
|
|
WR(0x8, 0x12);
|
|
WR(0xc, 0x14);
|
|
WR(0x12, 0x10);
|
|
WR(0xe, 0xf);
|
|
WR(0xf, 4);
|
|
/* WR(0xe,0xa);WR(0xf,4); */
|
|
WR(0xe, 0xd);
|
|
WR(0xf, 0);
|
|
/* CPP(0x30); */
|
|
}
|
|
|
|
/* Connect to the chip */
|
|
CPP(0xe0);
|
|
w0(0); w2(1); w2(4); /* Idle into SPP */
|
|
if (pi->mode >= 3) {
|
|
w0(0); w2(1); w2(4); w2(0xc);
|
|
/* Request EPP */
|
|
w0(0x40); w2(6); w2(7); w2(4); w2(0xc); w2(4);
|
|
}
|
|
|
|
if (!epatc8) {
|
|
WR(8, 0x10);
|
|
WR(0xc, 0x14);
|
|
WR(0xa, 0x38);
|
|
WR(0x12, 0x10);
|
|
}
|
|
}
|
|
|
|
static void epat_disconnect(struct pi_adapter *pi)
|
|
{
|
|
CPP(0x30);
|
|
w0(pi->saved_r0);
|
|
w2(pi->saved_r2);
|
|
}
|
|
|
|
static int epat_test_proto(struct pi_adapter *pi)
|
|
{
|
|
int k, j, f, cc;
|
|
int e[2] = { 0, 0 };
|
|
char scratch[512];
|
|
|
|
epat_connect(pi);
|
|
cc = RR(0xd);
|
|
epat_disconnect(pi);
|
|
|
|
epat_connect(pi);
|
|
for (j=0;j<2;j++) {
|
|
WRi(6, 0xa0 + j * 0x10);
|
|
for (k = 0; k < 256; k++) {
|
|
WRi(2, k ^ 0xaa);
|
|
WRi(3, k ^ 0x55);
|
|
if (RRi(2) != (k ^ 0xaa))
|
|
e[j]++;
|
|
}
|
|
}
|
|
epat_disconnect(pi);
|
|
|
|
f = 0;
|
|
epat_connect(pi);
|
|
WR(0x13, 1); WR(0x13, 0); WR(0xa, 0x11);
|
|
epat_read_block(pi, scratch, 512);
|
|
|
|
for (k = 0; k < 256; k++) {
|
|
if ((scratch[2 * k] & 0xff) != k)
|
|
f++;
|
|
if ((scratch[2 * k + 1] & 0xff) != 0xff - k)
|
|
f++;
|
|
}
|
|
epat_disconnect(pi);
|
|
|
|
dev_dbg(&pi->dev,
|
|
"epat: port 0x%x, mode %d, ccr %x, test=(%d,%d,%d)\n",
|
|
pi->port, pi->mode, cc, e[0], e[1], f);
|
|
|
|
return (e[0] && e[1]) || f;
|
|
}
|
|
|
|
static void epat_log_adapter(struct pi_adapter *pi)
|
|
{
|
|
int ver;
|
|
char *mode_string[6] =
|
|
{ "4-bit", "5/3", "8-bit", "EPP-8", "EPP-16", "EPP-32" };
|
|
|
|
epat_connect(pi);
|
|
WR(0xa, 0x38); /* read the version code */
|
|
ver = RR(0xb);
|
|
epat_disconnect(pi);
|
|
|
|
dev_info(&pi->dev,
|
|
"Shuttle EPAT chip %x at 0x%x, mode %d (%s), delay %d\n",
|
|
ver, pi->port, pi->mode, mode_string[pi->mode], pi->delay);
|
|
}
|
|
|
|
static struct pi_protocol epat = {
|
|
.owner = THIS_MODULE,
|
|
.name = "epat",
|
|
.max_mode = 6,
|
|
.epp_first = 3,
|
|
.default_delay = 1,
|
|
.max_units = 1,
|
|
.write_regr = epat_write_regr,
|
|
.read_regr = epat_read_regr,
|
|
.write_block = epat_write_block,
|
|
.read_block = epat_read_block,
|
|
.connect = epat_connect,
|
|
.disconnect = epat_disconnect,
|
|
.test_proto = epat_test_proto,
|
|
.log_adapter = epat_log_adapter,
|
|
};
|
|
|
|
static int __init epat_init(void)
|
|
{
|
|
#ifdef CONFIG_PATA_PARPORT_EPATC8
|
|
epatc8 = 1;
|
|
#endif
|
|
return pata_parport_register_driver(&epat);
|
|
}
|
|
|
|
static void __exit epat_exit(void)
|
|
{
|
|
pata_parport_unregister_driver(&epat);
|
|
}
|
|
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_AUTHOR("Grant R. Guenther <grant@torque.net>");
|
|
MODULE_DESCRIPTION("Shuttle Technologies EPAT parallel port IDE adapter "
|
|
"protocol driver");
|
|
module_init(epat_init)
|
|
module_exit(epat_exit)
|