mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-26 10:49:33 +00:00
478 lines
9.3 KiB
C
478 lines
9.3 KiB
C
![]() |
/*
|
||
|
bpck.c (c) 1996-8 Grant R. Guenther <grant@torque.net>
|
||
|
Under the terms of the GNU General Public License.
|
||
|
|
||
|
bpck.c is a low-level protocol driver for the MicroSolutions
|
||
|
"backpack" parallel port IDE adapter.
|
||
|
|
||
|
*/
|
||
|
|
||
|
/* Changes:
|
||
|
|
||
|
1.01 GRG 1998.05.05 init_proto, release_proto, pi->delay
|
||
|
1.02 GRG 1998.08.15 default pi->delay returned to 4
|
||
|
|
||
|
*/
|
||
|
|
||
|
#define BPCK_VERSION "1.02"
|
||
|
|
||
|
#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"
|
||
|
|
||
|
#undef r2
|
||
|
#undef w2
|
||
|
|
||
|
#define PC pi->private
|
||
|
#define r2() (PC=(in_p(2) & 0xff))
|
||
|
#define w2(byte) {out_p(2,byte); PC = byte;}
|
||
|
#define t2(pat) {PC ^= pat; out_p(2,PC);}
|
||
|
#define e2() {PC &= 0xfe; out_p(2,PC);}
|
||
|
#define o2() {PC |= 1; out_p(2,PC);}
|
||
|
|
||
|
#define j44(l,h) (((l>>3)&0x7)|((l>>4)&0x8)|((h<<1)&0x70)|(h&0x80))
|
||
|
|
||
|
/* cont = 0 - access the IDE register file
|
||
|
cont = 1 - access the IDE command set
|
||
|
cont = 2 - use internal bpck register addressing
|
||
|
*/
|
||
|
|
||
|
static int cont_map[3] = { 0x40, 0x48, 0 };
|
||
|
|
||
|
static int bpck_read_regr( PIA *pi, int cont, int regr )
|
||
|
|
||
|
{ int r, l, h;
|
||
|
|
||
|
r = regr + cont_map[cont];
|
||
|
|
||
|
switch (pi->mode) {
|
||
|
|
||
|
case 0: w0(r & 0xf); w0(r); t2(2); t2(4);
|
||
|
l = r1();
|
||
|
t2(4);
|
||
|
h = r1();
|
||
|
return j44(l,h);
|
||
|
|
||
|
case 1: w0(r & 0xf); w0(r); t2(2);
|
||
|
e2(); t2(0x20);
|
||
|
t2(4); h = r0();
|
||
|
t2(1); t2(0x20);
|
||
|
return h;
|
||
|
|
||
|
case 2:
|
||
|
case 3:
|
||
|
case 4: w0(r); w2(9); w2(0); w2(0x20);
|
||
|
h = r4();
|
||
|
w2(0);
|
||
|
return h;
|
||
|
|
||
|
}
|
||
|
return -1;
|
||
|
}
|
||
|
|
||
|
static void bpck_write_regr( PIA *pi, int cont, int regr, int val )
|
||
|
|
||
|
{ int r;
|
||
|
|
||
|
r = regr + cont_map[cont];
|
||
|
|
||
|
switch (pi->mode) {
|
||
|
|
||
|
case 0:
|
||
|
case 1: w0(r);
|
||
|
t2(2);
|
||
|
w0(val);
|
||
|
o2(); t2(4); t2(1);
|
||
|
break;
|
||
|
|
||
|
case 2:
|
||
|
case 3:
|
||
|
case 4: w0(r); w2(9); w2(0);
|
||
|
w0(val); w2(1); w2(3); w2(0);
|
||
|
break;
|
||
|
|
||
|
}
|
||
|
}
|
||
|
|
||
|
/* These macros access the bpck registers in native addressing */
|
||
|
|
||
|
#define WR(r,v) bpck_write_regr(pi,2,r,v)
|
||
|
#define RR(r) (bpck_read_regr(pi,2,r))
|
||
|
|
||
|
static void bpck_write_block( PIA *pi, char * buf, int count )
|
||
|
|
||
|
{ int i;
|
||
|
|
||
|
switch (pi->mode) {
|
||
|
|
||
|
case 0: WR(4,0x40);
|
||
|
w0(0x40); t2(2); t2(1);
|
||
|
for (i=0;i<count;i++) { w0(buf[i]); t2(4); }
|
||
|
WR(4,0);
|
||
|
break;
|
||
|
|
||
|
case 1: WR(4,0x50);
|
||
|
w0(0x40); t2(2); t2(1);
|
||
|
for (i=0;i<count;i++) { w0(buf[i]); t2(4); }
|
||
|
WR(4,0x10);
|
||
|
break;
|
||
|
|
||
|
case 2: WR(4,0x48);
|
||
|
w0(0x40); w2(9); w2(0); w2(1);
|
||
|
for (i=0;i<count;i++) w4(buf[i]);
|
||
|
w2(0);
|
||
|
WR(4,8);
|
||
|
break;
|
||
|
|
||
|
case 3: WR(4,0x48);
|
||
|
w0(0x40); w2(9); w2(0); w2(1);
|
||
|
for (i=0;i<count/2;i++) w4w(((u16 *)buf)[i]);
|
||
|
w2(0);
|
||
|
WR(4,8);
|
||
|
break;
|
||
|
|
||
|
case 4: WR(4,0x48);
|
||
|
w0(0x40); w2(9); w2(0); w2(1);
|
||
|
for (i=0;i<count/4;i++) w4l(((u32 *)buf)[i]);
|
||
|
w2(0);
|
||
|
WR(4,8);
|
||
|
break;
|
||
|
}
|
||
|
}
|
||
|
|
||
|
static void bpck_read_block( PIA *pi, char * buf, int count )
|
||
|
|
||
|
{ int i, l, h;
|
||
|
|
||
|
switch (pi->mode) {
|
||
|
|
||
|
case 0: WR(4,0x40);
|
||
|
w0(0x40); t2(2);
|
||
|
for (i=0;i<count;i++) {
|
||
|
t2(4); l = r1();
|
||
|
t2(4); h = r1();
|
||
|
buf[i] = j44(l,h);
|
||
|
}
|
||
|
WR(4,0);
|
||
|
break;
|
||
|
|
||
|
case 1: WR(4,0x50);
|
||
|
w0(0x40); t2(2); t2(0x20);
|
||
|
for(i=0;i<count;i++) { t2(4); buf[i] = r0(); }
|
||
|
t2(1); t2(0x20);
|
||
|
WR(4,0x10);
|
||
|
break;
|
||
|
|
||
|
case 2: WR(4,0x48);
|
||
|
w0(0x40); w2(9); w2(0); w2(0x20);
|
||
|
for (i=0;i<count;i++) buf[i] = r4();
|
||
|
w2(0);
|
||
|
WR(4,8);
|
||
|
break;
|
||
|
|
||
|
case 3: WR(4,0x48);
|
||
|
w0(0x40); w2(9); w2(0); w2(0x20);
|
||
|
for (i=0;i<count/2;i++) ((u16 *)buf)[i] = r4w();
|
||
|
w2(0);
|
||
|
WR(4,8);
|
||
|
break;
|
||
|
|
||
|
case 4: WR(4,0x48);
|
||
|
w0(0x40); w2(9); w2(0); w2(0x20);
|
||
|
for (i=0;i<count/4;i++) ((u32 *)buf)[i] = r4l();
|
||
|
w2(0);
|
||
|
WR(4,8);
|
||
|
break;
|
||
|
|
||
|
}
|
||
|
}
|
||
|
|
||
|
static int bpck_probe_unit ( PIA *pi )
|
||
|
|
||
|
{ int o1, o0, f7, id;
|
||
|
int t, s;
|
||
|
|
||
|
id = pi->unit;
|
||
|
s = 0;
|
||
|
w2(4); w2(0xe); r2(); t2(2);
|
||
|
o1 = r1()&0xf8;
|
||
|
o0 = r0();
|
||
|
w0(255-id); w2(4); w0(id);
|
||
|
t2(8); t2(8); t2(8);
|
||
|
t2(2); t = r1()&0xf8;
|
||
|
f7 = ((id % 8) == 7);
|
||
|
if ((f7) || (t != o1)) { t2(2); s = r1()&0xf8; }
|
||
|
if ((t == o1) && ((!f7) || (s == o1))) {
|
||
|
w2(0x4c); w0(o0);
|
||
|
return 0;
|
||
|
}
|
||
|
t2(8); w0(0); t2(2); w2(0x4c); w0(o0);
|
||
|
return 1;
|
||
|
}
|
||
|
|
||
|
static void bpck_connect ( PIA *pi )
|
||
|
|
||
|
{ pi->saved_r0 = r0();
|
||
|
w0(0xff-pi->unit); w2(4); w0(pi->unit);
|
||
|
t2(8); t2(8); t2(8);
|
||
|
t2(2); t2(2);
|
||
|
|
||
|
switch (pi->mode) {
|
||
|
|
||
|
case 0: t2(8); WR(4,0);
|
||
|
break;
|
||
|
|
||
|
case 1: t2(8); WR(4,0x10);
|
||
|
break;
|
||
|
|
||
|
case 2:
|
||
|
case 3:
|
||
|
case 4: w2(0); WR(4,8);
|
||
|
break;
|
||
|
|
||
|
}
|
||
|
|
||
|
WR(5,8);
|
||
|
|
||
|
if (pi->devtype == PI_PCD) {
|
||
|
WR(0x46,0x10); /* fiddle with ESS logic ??? */
|
||
|
WR(0x4c,0x38);
|
||
|
WR(0x4d,0x88);
|
||
|
WR(0x46,0xa0);
|
||
|
WR(0x41,0);
|
||
|
WR(0x4e,8);
|
||
|
}
|
||
|
}
|
||
|
|
||
|
static void bpck_disconnect ( PIA *pi )
|
||
|
|
||
|
{ w0(0);
|
||
|
if (pi->mode >= 2) { w2(9); w2(0); } else t2(2);
|
||
|
w2(0x4c); w0(pi->saved_r0);
|
||
|
}
|
||
|
|
||
|
static void bpck_force_spp ( PIA *pi )
|
||
|
|
||
|
/* This fakes the EPP protocol to turn off EPP ... */
|
||
|
|
||
|
{ pi->saved_r0 = r0();
|
||
|
w0(0xff-pi->unit); w2(4); w0(pi->unit);
|
||
|
t2(8); t2(8); t2(8);
|
||
|
t2(2); t2(2);
|
||
|
|
||
|
w2(0);
|
||
|
w0(4); w2(9); w2(0);
|
||
|
w0(0); w2(1); w2(3); w2(0);
|
||
|
w0(0); w2(9); w2(0);
|
||
|
w2(0x4c); w0(pi->saved_r0);
|
||
|
}
|
||
|
|
||
|
#define TEST_LEN 16
|
||
|
|
||
|
static int bpck_test_proto( PIA *pi, char * scratch, int verbose )
|
||
|
|
||
|
{ int i, e, l, h, om;
|
||
|
char buf[TEST_LEN];
|
||
|
|
||
|
bpck_force_spp(pi);
|
||
|
|
||
|
switch (pi->mode) {
|
||
|
|
||
|
case 0: bpck_connect(pi);
|
||
|
WR(0x13,0x7f);
|
||
|
w0(0x13); t2(2);
|
||
|
for(i=0;i<TEST_LEN;i++) {
|
||
|
t2(4); l = r1();
|
||
|
t2(4); h = r1();
|
||
|
buf[i] = j44(l,h);
|
||
|
}
|
||
|
bpck_disconnect(pi);
|
||
|
break;
|
||
|
|
||
|
case 1: bpck_connect(pi);
|
||
|
WR(0x13,0x7f);
|
||
|
w0(0x13); t2(2); t2(0x20);
|
||
|
for(i=0;i<TEST_LEN;i++) { t2(4); buf[i] = r0(); }
|
||
|
t2(1); t2(0x20);
|
||
|
bpck_disconnect(pi);
|
||
|
break;
|
||
|
|
||
|
case 2:
|
||
|
case 3:
|
||
|
case 4: om = pi->mode;
|
||
|
pi->mode = 0;
|
||
|
bpck_connect(pi);
|
||
|
WR(7,3);
|
||
|
WR(4,8);
|
||
|
bpck_disconnect(pi);
|
||
|
|
||
|
pi->mode = om;
|
||
|
bpck_connect(pi);
|
||
|
w0(0x13); w2(9); w2(1); w0(0); w2(3); w2(0); w2(0xe0);
|
||
|
|
||
|
switch (pi->mode) {
|
||
|
case 2: for (i=0;i<TEST_LEN;i++) buf[i] = r4();
|
||
|
break;
|
||
|
case 3: for (i=0;i<TEST_LEN/2;i++) ((u16 *)buf)[i] = r4w();
|
||
|
break;
|
||
|
case 4: for (i=0;i<TEST_LEN/4;i++) ((u32 *)buf)[i] = r4l();
|
||
|
break;
|
||
|
}
|
||
|
|
||
|
w2(0);
|
||
|
WR(7,0);
|
||
|
bpck_disconnect(pi);
|
||
|
|
||
|
break;
|
||
|
|
||
|
}
|
||
|
|
||
|
if (verbose) {
|
||
|
printk("%s: bpck: 0x%x unit %d mode %d: ",
|
||
|
pi->device,pi->port,pi->unit,pi->mode);
|
||
|
for (i=0;i<TEST_LEN;i++) printk("%3d",buf[i]);
|
||
|
printk("\n");
|
||
|
}
|
||
|
|
||
|
e = 0;
|
||
|
for (i=0;i<TEST_LEN;i++) if (buf[i] != (i+1)) e++;
|
||
|
return e;
|
||
|
}
|
||
|
|
||
|
static void bpck_read_eeprom ( PIA *pi, char * buf )
|
||
|
|
||
|
{ int i,j,k,n,p,v,f, om, od;
|
||
|
|
||
|
bpck_force_spp(pi);
|
||
|
|
||
|
om = pi->mode; od = pi->delay;
|
||
|
pi->mode = 0; pi->delay = 6;
|
||
|
|
||
|
bpck_connect(pi);
|
||
|
|
||
|
n = 0;
|
||
|
WR(4,0);
|
||
|
for (i=0;i<64;i++) {
|
||
|
WR(6,8);
|
||
|
WR(6,0xc);
|
||
|
p = 0x100;
|
||
|
for (k=0;k<9;k++) {
|
||
|
f = (((i + 0x180) & p) != 0) * 2;
|
||
|
WR(6,f+0xc);
|
||
|
WR(6,f+0xd);
|
||
|
WR(6,f+0xc);
|
||
|
p = (p >> 1);
|
||
|
}
|
||
|
for (j=0;j<2;j++) {
|
||
|
v = 0;
|
||
|
for (k=0;k<8;k++) {
|
||
|
WR(6,0xc);
|
||
|
WR(6,0xd);
|
||
|
WR(6,0xc);
|
||
|
f = RR(0);
|
||
|
v = 2*v + (f == 0x84);
|
||
|
}
|
||
|
buf[2*i+1-j] = v;
|
||
|
}
|
||
|
}
|
||
|
WR(6,8);
|
||
|
WR(6,0);
|
||
|
WR(5,8);
|
||
|
|
||
|
bpck_disconnect(pi);
|
||
|
|
||
|
if (om >= 2) {
|
||
|
bpck_connect(pi);
|
||
|
WR(7,3);
|
||
|
WR(4,8);
|
||
|
bpck_disconnect(pi);
|
||
|
}
|
||
|
|
||
|
pi->mode = om; pi->delay = od;
|
||
|
}
|
||
|
|
||
|
static int bpck_test_port ( PIA *pi ) /* check for 8-bit port */
|
||
|
|
||
|
{ int i, r, m;
|
||
|
|
||
|
w2(0x2c); i = r0(); w0(255-i); r = r0(); w0(i);
|
||
|
m = -1;
|
||
|
if (r == i) m = 2;
|
||
|
if (r == (255-i)) m = 0;
|
||
|
|
||
|
w2(0xc); i = r0(); w0(255-i); r = r0(); w0(i);
|
||
|
if (r != (255-i)) m = -1;
|
||
|
|
||
|
if (m == 0) { w2(6); w2(0xc); r = r0(); w0(0xaa); w0(r); w0(0xaa); }
|
||
|
if (m == 2) { w2(0x26); w2(0xc); }
|
||
|
|
||
|
if (m == -1) return 0;
|
||
|
return 5;
|
||
|
}
|
||
|
|
||
|
static void bpck_log_adapter( PIA *pi, char * scratch, int verbose )
|
||
|
|
||
|
{ char *mode_string[5] = { "4-bit","8-bit","EPP-8",
|
||
|
"EPP-16","EPP-32" };
|
||
|
|
||
|
#ifdef DUMP_EEPROM
|
||
|
int i;
|
||
|
#endif
|
||
|
|
||
|
bpck_read_eeprom(pi,scratch);
|
||
|
|
||
|
#ifdef DUMP_EEPROM
|
||
|
if (verbose) {
|
||
|
for(i=0;i<128;i++)
|
||
|
if ((scratch[i] < ' ') || (scratch[i] > '~'))
|
||
|
scratch[i] = '.';
|
||
|
printk("%s: bpck EEPROM: %64.64s\n",pi->device,scratch);
|
||
|
printk("%s: %64.64s\n",pi->device,&scratch[64]);
|
||
|
}
|
||
|
#endif
|
||
|
|
||
|
printk("%s: bpck %s, backpack %8.8s unit %d",
|
||
|
pi->device,BPCK_VERSION,&scratch[110],pi->unit);
|
||
|
printk(" at 0x%x, mode %d (%s), delay %d\n",pi->port,
|
||
|
pi->mode,mode_string[pi->mode],pi->delay);
|
||
|
}
|
||
|
|
||
|
static struct pi_protocol bpck = {
|
||
|
.owner = THIS_MODULE,
|
||
|
.name = "bpck",
|
||
|
.max_mode = 5,
|
||
|
.epp_first = 2,
|
||
|
.default_delay = 4,
|
||
|
.max_units = 255,
|
||
|
.write_regr = bpck_write_regr,
|
||
|
.read_regr = bpck_read_regr,
|
||
|
.write_block = bpck_write_block,
|
||
|
.read_block = bpck_read_block,
|
||
|
.connect = bpck_connect,
|
||
|
.disconnect = bpck_disconnect,
|
||
|
.test_port = bpck_test_port,
|
||
|
.probe_unit = bpck_probe_unit,
|
||
|
.test_proto = bpck_test_proto,
|
||
|
.log_adapter = bpck_log_adapter,
|
||
|
};
|
||
|
|
||
|
static int __init bpck_init(void)
|
||
|
{
|
||
|
return pi_register(&bpck)-1;
|
||
|
}
|
||
|
|
||
|
static void __exit bpck_exit(void)
|
||
|
{
|
||
|
pi_unregister(&bpck);
|
||
|
}
|
||
|
|
||
|
MODULE_LICENSE("GPL");
|
||
|
module_init(bpck_init)
|
||
|
module_exit(bpck_exit)
|