forked from Qortal/Brooklyn
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
340 lines
7.0 KiB
340 lines
7.0 KiB
/* |
|
epat.c (c) 1997-8 Grant R. Guenther <[email protected]> |
|
Under the terms of the GNU General Public License. |
|
|
|
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. |
|
|
|
*/ |
|
|
|
/* Changes: |
|
|
|
1.01 GRG 1998.05.06 init_proto, release_proto |
|
1.02 Joshua b. Jore CPP(renamed), epat_connect, epat_disconnect |
|
|
|
*/ |
|
|
|
#define EPAT_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" |
|
|
|
#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( PIA *pi, int cont, int regr, int val) |
|
|
|
{ int r; |
|
|
|
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( PIA *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( PIA *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( PIA *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) 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); |
|
|
|
static void epat_connect ( PIA *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 (PIA *pi) |
|
{ CPP(0x30); |
|
w0(pi->saved_r0); |
|
w2(pi->saved_r2); |
|
} |
|
|
|
static int epat_test_proto( PIA *pi, char * scratch, int verbose ) |
|
|
|
{ int k, j, f, cc; |
|
int e[2] = {0,0}; |
|
|
|
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); |
|
|
|
if (verbose) { |
|
printk("%s: epat: port 0x%x, mode %d, ccr %x, test=(%d,%d,%d)\n", |
|
pi->device,pi->port,pi->mode,cc,e[0],e[1],f); |
|
} |
|
|
|
return (e[0] && e[1]) || f; |
|
} |
|
|
|
static void epat_log_adapter( PIA *pi, char * scratch, int verbose ) |
|
|
|
{ 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); |
|
|
|
printk("%s: epat %s, Shuttle EPAT chip %x at 0x%x, ", |
|
pi->device,EPAT_VERSION,ver,pi->port); |
|
printk("mode %d (%s), delay %d\n",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_PARIDE_EPATC8 |
|
epatc8 = 1; |
|
#endif |
|
return paride_register(&epat); |
|
} |
|
|
|
static void __exit epat_exit(void) |
|
{ |
|
paride_unregister(&epat); |
|
} |
|
|
|
MODULE_LICENSE("GPL"); |
|
module_init(epat_init) |
|
module_exit(epat_exit)
|
|
|