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linux/drivers/block/paride/kbic.c
Alexey Dobriyan b4178ab58a [PATCH] paride_register(): shuffle return values 
paride_register() returns 1 on success, 0 on failure and module init
code looks like

	static int __init foo_init(void)
	{
		return paride_register(&foo) - 1;
	}

which is not what one get used to. Converted to usual 0/-E convention.

In case of kbic driver, unwind registration. It was just

	return (paride_register(&k951)||paride_register(&k971))-1;

Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-07 08:39:33 -08:00

306 lines
6.8 KiB
C
Raw Blame History

/*
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)
{
int rv;
rv = paride_register(&k951);
if (rv < 0)
return rv;
rv = paride_register(&k971);
if (rv < 0)
paride_unregister(&k951);
return rv;
}
static void __exit kbic_exit(void)
{
paride_unregister(&k951);
paride_unregister(&k971);
}
MODULE_LICENSE("GPL");
module_init(kbic_init)
module_exit(kbic_exit)
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