mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-27 15:15:02 +07:00
9828673d7d
CONFIG_PARIDE depends on CONFIG_PARPORT_PC, so there's no reason for these #ifdef's. Signed-off-by: Adrian Bunk <bunk@stusta.de> Acked-by: Alan Cox <alan@redhat.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
435 lines
8.5 KiB
C
435 lines
8.5 KiB
C
/*
|
|
paride.c (c) 1997-8 Grant R. Guenther <grant@torque.net>
|
|
Under the terms of the GNU General Public License.
|
|
|
|
This is the base module for the family of device drivers
|
|
that support parallel port IDE devices.
|
|
|
|
*/
|
|
|
|
/* Changes:
|
|
|
|
1.01 GRG 1998.05.03 Use spinlocks
|
|
1.02 GRG 1998.05.05 init_proto, release_proto, ktti
|
|
1.03 GRG 1998.08.15 eliminate compiler warning
|
|
1.04 GRG 1998.11.28 added support for FRIQ
|
|
1.05 TMW 2000.06.06 use parport_find_number instead of
|
|
parport_enumerate
|
|
1.06 TMW 2001.03.26 more sane parport-or-not resource management
|
|
*/
|
|
|
|
#define PI_VERSION "1.06"
|
|
|
|
#include <linux/module.h>
|
|
#include <linux/kmod.h>
|
|
#include <linux/types.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/ioport.h>
|
|
#include <linux/string.h>
|
|
#include <linux/spinlock.h>
|
|
#include <linux/wait.h>
|
|
#include <linux/sched.h> /* TASK_* */
|
|
#include <linux/parport.h>
|
|
|
|
#include "paride.h"
|
|
|
|
MODULE_LICENSE("GPL");
|
|
|
|
#define MAX_PROTOS 32
|
|
|
|
static struct pi_protocol *protocols[MAX_PROTOS];
|
|
|
|
static DEFINE_SPINLOCK(pi_spinlock);
|
|
|
|
void pi_write_regr(PIA * pi, int cont, int regr, int val)
|
|
{
|
|
pi->proto->write_regr(pi, cont, regr, val);
|
|
}
|
|
|
|
EXPORT_SYMBOL(pi_write_regr);
|
|
|
|
int pi_read_regr(PIA * pi, int cont, int regr)
|
|
{
|
|
return pi->proto->read_regr(pi, cont, regr);
|
|
}
|
|
|
|
EXPORT_SYMBOL(pi_read_regr);
|
|
|
|
void pi_write_block(PIA * pi, char *buf, int count)
|
|
{
|
|
pi->proto->write_block(pi, buf, count);
|
|
}
|
|
|
|
EXPORT_SYMBOL(pi_write_block);
|
|
|
|
void pi_read_block(PIA * pi, char *buf, int count)
|
|
{
|
|
pi->proto->read_block(pi, buf, count);
|
|
}
|
|
|
|
EXPORT_SYMBOL(pi_read_block);
|
|
|
|
static void pi_wake_up(void *p)
|
|
{
|
|
PIA *pi = (PIA *) p;
|
|
unsigned long flags;
|
|
void (*cont) (void) = NULL;
|
|
|
|
spin_lock_irqsave(&pi_spinlock, flags);
|
|
|
|
if (pi->claim_cont && !parport_claim(pi->pardev)) {
|
|
cont = pi->claim_cont;
|
|
pi->claim_cont = NULL;
|
|
pi->claimed = 1;
|
|
}
|
|
|
|
spin_unlock_irqrestore(&pi_spinlock, flags);
|
|
|
|
wake_up(&(pi->parq));
|
|
|
|
if (cont)
|
|
cont();
|
|
}
|
|
|
|
int pi_schedule_claimed(PIA * pi, void (*cont) (void))
|
|
{
|
|
unsigned long flags;
|
|
|
|
spin_lock_irqsave(&pi_spinlock, flags);
|
|
if (pi->pardev && parport_claim(pi->pardev)) {
|
|
pi->claim_cont = cont;
|
|
spin_unlock_irqrestore(&pi_spinlock, flags);
|
|
return 0;
|
|
}
|
|
pi->claimed = 1;
|
|
spin_unlock_irqrestore(&pi_spinlock, flags);
|
|
return 1;
|
|
}
|
|
EXPORT_SYMBOL(pi_schedule_claimed);
|
|
|
|
void pi_do_claimed(PIA * pi, void (*cont) (void))
|
|
{
|
|
if (pi_schedule_claimed(pi, cont))
|
|
cont();
|
|
}
|
|
|
|
EXPORT_SYMBOL(pi_do_claimed);
|
|
|
|
static void pi_claim(PIA * pi)
|
|
{
|
|
if (pi->claimed)
|
|
return;
|
|
pi->claimed = 1;
|
|
if (pi->pardev)
|
|
wait_event(pi->parq,
|
|
!parport_claim((struct pardevice *) pi->pardev));
|
|
}
|
|
|
|
static void pi_unclaim(PIA * pi)
|
|
{
|
|
pi->claimed = 0;
|
|
if (pi->pardev)
|
|
parport_release((struct pardevice *) (pi->pardev));
|
|
}
|
|
|
|
void pi_connect(PIA * pi)
|
|
{
|
|
pi_claim(pi);
|
|
pi->proto->connect(pi);
|
|
}
|
|
|
|
EXPORT_SYMBOL(pi_connect);
|
|
|
|
void pi_disconnect(PIA * pi)
|
|
{
|
|
pi->proto->disconnect(pi);
|
|
pi_unclaim(pi);
|
|
}
|
|
|
|
EXPORT_SYMBOL(pi_disconnect);
|
|
|
|
static void pi_unregister_parport(PIA * pi)
|
|
{
|
|
if (pi->pardev) {
|
|
parport_unregister_device((struct pardevice *) (pi->pardev));
|
|
pi->pardev = NULL;
|
|
}
|
|
}
|
|
|
|
void pi_release(PIA * pi)
|
|
{
|
|
pi_unregister_parport(pi);
|
|
if (pi->proto->release_proto)
|
|
pi->proto->release_proto(pi);
|
|
module_put(pi->proto->owner);
|
|
}
|
|
|
|
EXPORT_SYMBOL(pi_release);
|
|
|
|
static int default_test_proto(PIA * pi, char *scratch, int verbose)
|
|
{
|
|
int j, k;
|
|
int e[2] = { 0, 0 };
|
|
|
|
pi->proto->connect(pi);
|
|
|
|
for (j = 0; j < 2; j++) {
|
|
pi_write_regr(pi, 0, 6, 0xa0 + j * 0x10);
|
|
for (k = 0; k < 256; k++) {
|
|
pi_write_regr(pi, 0, 2, k ^ 0xaa);
|
|
pi_write_regr(pi, 0, 3, k ^ 0x55);
|
|
if (pi_read_regr(pi, 0, 2) != (k ^ 0xaa))
|
|
e[j]++;
|
|
}
|
|
}
|
|
pi->proto->disconnect(pi);
|
|
|
|
if (verbose)
|
|
printk("%s: %s: port 0x%x, mode %d, test=(%d,%d)\n",
|
|
pi->device, pi->proto->name, pi->port,
|
|
pi->mode, e[0], e[1]);
|
|
|
|
return (e[0] && e[1]); /* not here if both > 0 */
|
|
}
|
|
|
|
static int pi_test_proto(PIA * pi, char *scratch, int verbose)
|
|
{
|
|
int res;
|
|
|
|
pi_claim(pi);
|
|
if (pi->proto->test_proto)
|
|
res = pi->proto->test_proto(pi, scratch, verbose);
|
|
else
|
|
res = default_test_proto(pi, scratch, verbose);
|
|
pi_unclaim(pi);
|
|
|
|
return res;
|
|
}
|
|
|
|
int paride_register(PIP * pr)
|
|
{
|
|
int k;
|
|
|
|
for (k = 0; k < MAX_PROTOS; k++)
|
|
if (protocols[k] && !strcmp(pr->name, protocols[k]->name)) {
|
|
printk("paride: %s protocol already registered\n",
|
|
pr->name);
|
|
return -1;
|
|
}
|
|
k = 0;
|
|
while ((k < MAX_PROTOS) && (protocols[k]))
|
|
k++;
|
|
if (k == MAX_PROTOS) {
|
|
printk("paride: protocol table full\n");
|
|
return -1;
|
|
}
|
|
protocols[k] = pr;
|
|
pr->index = k;
|
|
printk("paride: %s registered as protocol %d\n", pr->name, k);
|
|
return 0;
|
|
}
|
|
|
|
EXPORT_SYMBOL(paride_register);
|
|
|
|
void paride_unregister(PIP * pr)
|
|
{
|
|
if (!pr)
|
|
return;
|
|
if (protocols[pr->index] != pr) {
|
|
printk("paride: %s not registered\n", pr->name);
|
|
return;
|
|
}
|
|
protocols[pr->index] = NULL;
|
|
}
|
|
|
|
EXPORT_SYMBOL(paride_unregister);
|
|
|
|
static int pi_register_parport(PIA * pi, int verbose)
|
|
{
|
|
struct parport *port;
|
|
|
|
port = parport_find_base(pi->port);
|
|
if (!port)
|
|
return 0;
|
|
|
|
pi->pardev = parport_register_device(port,
|
|
pi->device, NULL,
|
|
pi_wake_up, NULL, 0, (void *) pi);
|
|
parport_put_port(port);
|
|
if (!pi->pardev)
|
|
return 0;
|
|
|
|
init_waitqueue_head(&pi->parq);
|
|
|
|
if (verbose)
|
|
printk("%s: 0x%x is %s\n", pi->device, pi->port, port->name);
|
|
|
|
pi->parname = (char *) port->name;
|
|
|
|
return 1;
|
|
}
|
|
|
|
static int pi_probe_mode(PIA * pi, int max, char *scratch, int verbose)
|
|
{
|
|
int best, range;
|
|
|
|
if (pi->mode != -1) {
|
|
if (pi->mode >= max)
|
|
return 0;
|
|
range = 3;
|
|
if (pi->mode >= pi->proto->epp_first)
|
|
range = 8;
|
|
if ((range == 8) && (pi->port % 8))
|
|
return 0;
|
|
pi->reserved = range;
|
|
return (!pi_test_proto(pi, scratch, verbose));
|
|
}
|
|
best = -1;
|
|
for (pi->mode = 0; pi->mode < max; pi->mode++) {
|
|
range = 3;
|
|
if (pi->mode >= pi->proto->epp_first)
|
|
range = 8;
|
|
if ((range == 8) && (pi->port % 8))
|
|
break;
|
|
pi->reserved = range;
|
|
if (!pi_test_proto(pi, scratch, verbose))
|
|
best = pi->mode;
|
|
}
|
|
pi->mode = best;
|
|
return (best > -1);
|
|
}
|
|
|
|
static int pi_probe_unit(PIA * pi, int unit, char *scratch, int verbose)
|
|
{
|
|
int max, s, e;
|
|
|
|
s = unit;
|
|
e = s + 1;
|
|
|
|
if (s == -1) {
|
|
s = 0;
|
|
e = pi->proto->max_units;
|
|
}
|
|
|
|
if (!pi_register_parport(pi, verbose))
|
|
return 0;
|
|
|
|
if (pi->proto->test_port) {
|
|
pi_claim(pi);
|
|
max = pi->proto->test_port(pi);
|
|
pi_unclaim(pi);
|
|
} else
|
|
max = pi->proto->max_mode;
|
|
|
|
if (pi->proto->probe_unit) {
|
|
pi_claim(pi);
|
|
for (pi->unit = s; pi->unit < e; pi->unit++)
|
|
if (pi->proto->probe_unit(pi)) {
|
|
pi_unclaim(pi);
|
|
if (pi_probe_mode(pi, max, scratch, verbose))
|
|
return 1;
|
|
pi_unregister_parport(pi);
|
|
return 0;
|
|
}
|
|
pi_unclaim(pi);
|
|
pi_unregister_parport(pi);
|
|
return 0;
|
|
}
|
|
|
|
if (!pi_probe_mode(pi, max, scratch, verbose)) {
|
|
pi_unregister_parport(pi);
|
|
return 0;
|
|
}
|
|
return 1;
|
|
|
|
}
|
|
|
|
int pi_init(PIA * pi, int autoprobe, int port, int mode,
|
|
int unit, int protocol, int delay, char *scratch,
|
|
int devtype, int verbose, char *device)
|
|
{
|
|
int p, k, s, e;
|
|
int lpts[7] = { 0x3bc, 0x378, 0x278, 0x268, 0x27c, 0x26c, 0 };
|
|
|
|
s = protocol;
|
|
e = s + 1;
|
|
|
|
if (!protocols[0])
|
|
request_module("paride_protocol");
|
|
|
|
if (autoprobe) {
|
|
s = 0;
|
|
e = MAX_PROTOS;
|
|
} else if ((s < 0) || (s >= MAX_PROTOS) || (port <= 0) ||
|
|
(!protocols[s]) || (unit < 0) ||
|
|
(unit >= protocols[s]->max_units)) {
|
|
printk("%s: Invalid parameters\n", device);
|
|
return 0;
|
|
}
|
|
|
|
for (p = s; p < e; p++) {
|
|
struct pi_protocol *proto = protocols[p];
|
|
if (!proto)
|
|
continue;
|
|
/* still racy */
|
|
if (!try_module_get(proto->owner))
|
|
continue;
|
|
pi->proto = proto;
|
|
pi->private = 0;
|
|
if (proto->init_proto && proto->init_proto(pi) < 0) {
|
|
pi->proto = NULL;
|
|
module_put(proto->owner);
|
|
continue;
|
|
}
|
|
if (delay == -1)
|
|
pi->delay = pi->proto->default_delay;
|
|
else
|
|
pi->delay = delay;
|
|
pi->devtype = devtype;
|
|
pi->device = device;
|
|
|
|
pi->parname = NULL;
|
|
pi->pardev = NULL;
|
|
init_waitqueue_head(&pi->parq);
|
|
pi->claimed = 0;
|
|
pi->claim_cont = NULL;
|
|
|
|
pi->mode = mode;
|
|
if (port != -1) {
|
|
pi->port = port;
|
|
if (pi_probe_unit(pi, unit, scratch, verbose))
|
|
break;
|
|
pi->port = 0;
|
|
} else {
|
|
k = 0;
|
|
while ((pi->port = lpts[k++]))
|
|
if (pi_probe_unit
|
|
(pi, unit, scratch, verbose))
|
|
break;
|
|
if (pi->port)
|
|
break;
|
|
}
|
|
if (pi->proto->release_proto)
|
|
pi->proto->release_proto(pi);
|
|
module_put(proto->owner);
|
|
}
|
|
|
|
if (!pi->port) {
|
|
if (autoprobe)
|
|
printk("%s: Autoprobe failed\n", device);
|
|
else
|
|
printk("%s: Adapter not found\n", device);
|
|
return 0;
|
|
}
|
|
|
|
if (pi->parname)
|
|
printk("%s: Sharing %s at 0x%x\n", pi->device,
|
|
pi->parname, pi->port);
|
|
|
|
pi->proto->log_adapter(pi, scratch, verbose);
|
|
|
|
return 1;
|
|
}
|
|
|
|
EXPORT_SYMBOL(pi_init);
|