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linux/drivers/block/paride/kbic.c
Linus Torvalds 1da177e4c3 Linux-2.6.12-rc2 
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!
2005-04-16 15:20:36 -07:00

298 lines
6.7 KiB
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/*
kbic.c (c) 1997-8 Grant R. Guenther <grant@torque.net>
Under the terms of the GNU General Public License.
This is a low-level driver for the KBIC-951A and KBIC-971A
parallel to IDE adapter chips from KingByte Information Systems.
The chips are almost identical, however, the wakeup code
required for the 971A interferes with the correct operation of
the 951A, so this driver registers itself twice, once for
each chip.
*/
/* Changes:
1.01 GRG 1998.05.06 init_proto, release_proto
*/
#define KBIC_VERSION "1.01"
#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 r12w() (delay_p,inw(pi->port+1)&0xffff)
#define j44(a,b) ((((a>>4)&0x0f)|(b&0xf0))^0x88)
#define j53(w) (((w>>3)&0x1f)|((w>>4)&0xe0))
/* cont = 0 - access the IDE register file
cont = 1 - access the IDE command set
*/
static int cont_map[2] = { 0x80, 0x40 };
static int kbic_read_regr( PIA *pi, int cont, int regr )
{ int a, b, s;
s = cont_map[cont];
switch (pi->mode) {
case 0: w0(regr|0x18|s); w2(4); w2(6); w2(4); w2(1); w0(8);
a = r1(); w0(0x28); b = r1(); w2(4);
return j44(a,b);
case 1: w0(regr|0x38|s); w2(4); w2(6); w2(4); w2(5); w0(8);
a = r12w(); w2(4);
return j53(a);
case 2: w0(regr|0x08|s); w2(4); w2(6); w2(4); w2(0xa5); w2(0xa1);
a = r0(); w2(4);
return a;
case 3:
case 4:
case 5: w0(0x20|s); w2(4); w2(6); w2(4); w3(regr);
a = r4(); b = r4(); w2(4); w2(0); w2(4);
return a;
}
return -1;
}
static void kbic_write_regr( PIA *pi, int cont, int regr, int val)
{ int s;
s = cont_map[cont];
switch (pi->mode) {
case 0:
case 1:
case 2: w0(regr|0x10|s); w2(4); w2(6); w2(4);
w0(val); w2(5); w2(4);
break;
case 3:
case 4:
case 5: w0(0x20|s); w2(4); w2(6); w2(4); w3(regr);
w4(val); w4(val);
w2(4); w2(0); w2(4);
break;
}
}
static void k951_connect ( PIA *pi )
{ pi->saved_r0 = r0();
pi->saved_r2 = r2();
w2(4);
}
static void k951_disconnect ( PIA *pi )
{ w0(pi->saved_r0);
w2(pi->saved_r2);
}
#define CCP(x) w2(0xc4);w0(0xaa);w0(0x55);w0(0);w0(0xff);w0(0x87);\
w0(0x78);w0(x);w2(0xc5);w2(0xc4);w0(0xff);
static void k971_connect ( PIA *pi )
{ pi->saved_r0 = r0();
pi->saved_r2 = r2();
CCP(0x20);
w2(4);
}
static void k971_disconnect ( PIA *pi )
{ CCP(0x30);
w0(pi->saved_r0);
w2(pi->saved_r2);
}
/* counts must be congruent to 0 MOD 4, but all known applications
have this property.
*/
static void kbic_read_block( PIA *pi, char * buf, int count )
{ int k, a, b;
switch (pi->mode) {
case 0: w0(0x98); w2(4); w2(6); w2(4);
for (k=0;k<count/2;k++) {
w2(1); w0(8); a = r1();
w0(0x28); b = r1();
buf[2*k] = j44(a,b);
w2(5); b = r1();
w0(8); a = r1();
buf[2*k+1] = j44(a,b);
w2(4);
}
break;
case 1: w0(0xb8); w2(4); w2(6); w2(4);
for (k=0;k<count/4;k++) {
w0(0xb8);
w2(4); w2(5);
w0(8); buf[4*k] = j53(r12w());
w0(0xb8); buf[4*k+1] = j53(r12w());
w2(4); w2(5);
buf[4*k+3] = j53(r12w());
w0(8); buf[4*k+2] = j53(r12w());
}
w2(4);
break;
case 2: w0(0x88); w2(4); w2(6); w2(4);
for (k=0;k<count/2;k++) {
w2(0xa0); w2(0xa1); buf[2*k] = r0();
w2(0xa5); buf[2*k+1] = r0();
}
w2(4);
break;
case 3: w0(0xa0); w2(4); w2(6); w2(4); w3(0);
for (k=0;k<count;k++) buf[k] = r4();
w2(4); w2(0); w2(4);
break;
case 4: w0(0xa0); w2(4); w2(6); w2(4); w3(0);
for (k=0;k<count/2;k++) ((u16 *)buf)[k] = r4w();
w2(4); w2(0); w2(4);
break;
case 5: w0(0xa0); w2(4); w2(6); w2(4); w3(0);
for (k=0;k<count/4;k++) ((u32 *)buf)[k] = r4l();
w2(4); w2(0); w2(4);
break;
}
}
static void kbic_write_block( PIA *pi, char * buf, int count )
{ int k;
switch (pi->mode) {
case 0:
case 1:
case 2: w0(0x90); w2(4); w2(6); w2(4);
for(k=0;k<count/2;k++) {
w0(buf[2*k+1]); w2(0); w2(4);
w0(buf[2*k]); w2(5); w2(4);
}
break;
case 3: w0(0xa0); w2(4); w2(6); w2(4); w3(0);
for(k=0;k<count/2;k++) {
w4(buf[2*k+1]);
w4(buf[2*k]);
}
w2(4); w2(0); w2(4);
break;
case 4: w0(0xa0); w2(4); w2(6); w2(4); w3(0);
for(k=0;k<count/2;k++) w4w(pi_swab16(buf,k));
w2(4); w2(0); w2(4);
break;
case 5: w0(0xa0); w2(4); w2(6); w2(4); w3(0);
for(k=0;k<count/4;k++) w4l(pi_swab32(buf,k));
w2(4); w2(0); w2(4);
break;
}
}
static void kbic_log_adapter( PIA *pi, char * scratch,
int verbose, char * chip )
{ char *mode_string[6] = {"4-bit","5/3","8-bit",
"EPP-8","EPP_16","EPP-32"};
printk("%s: kbic %s, KingByte %s at 0x%x, ",
pi->device,KBIC_VERSION,chip,pi->port);
printk("mode %d (%s), delay %d\n",pi->mode,
mode_string[pi->mode],pi->delay);
}
static void k951_log_adapter( PIA *pi, char * scratch, int verbose )
{ kbic_log_adapter(pi,scratch,verbose,"KBIC-951A");
}
static void k971_log_adapter( PIA *pi, char * scratch, int verbose )
{ kbic_log_adapter(pi,scratch,verbose,"KBIC-971A");
}
static struct pi_protocol k951 = {
.owner = THIS_MODULE,
.name = "k951",
.max_mode = 6,
.epp_first = 3,
.default_delay = 1,
.max_units = 1,
.write_regr = kbic_write_regr,
.read_regr = kbic_read_regr,
.write_block = kbic_write_block,
.read_block = kbic_read_block,
.connect = k951_connect,
.disconnect = k951_disconnect,
.log_adapter = k951_log_adapter,
};
static struct pi_protocol k971 = {
.owner = THIS_MODULE,
.name = "k971",
.max_mode = 6,
.epp_first = 3,
.default_delay = 1,
.max_units = 1,
.write_regr = kbic_write_regr,
.read_regr = kbic_read_regr,
.write_block = kbic_write_block,
.read_block = kbic_read_block,
.connect = k971_connect,
.disconnect = k971_disconnect,
.log_adapter = k971_log_adapter,
};
static int __init kbic_init(void)
{
return (pi_register(&k951)||pi_register(&k971))-1;
}
static void __exit kbic_exit(void)
{
pi_unregister(&k951);
pi_unregister(&k971);
}
MODULE_LICENSE("GPL");
module_init(kbic_init)
module_exit(kbic_exit)
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