mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-11-23 20:24:12 +08:00
2d09ac951b
Commit 1a59d1b8e0 ("treewide: Replace GPLv2 boilerplate/reference with
SPDX - rule 156") has left some empty comment blocks.
Remove them to save a few lines of code.
Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Link: https://lore.kernel.org/r/26a2b905b259bfffaf2de5b26f2007b8606970ed.1664478665.git.christophe.jaillet@wanadoo.fr
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
323 lines
6.0 KiB
C
323 lines
6.0 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
|
|
/*
|
|
* Copyright (c) 1998-2001 Vojtech Pavlik
|
|
*/
|
|
|
|
/*
|
|
* PDPI Lightning 4 gamecard driver for Linux.
|
|
*/
|
|
|
|
#include <asm/io.h>
|
|
#include <linux/delay.h>
|
|
#include <linux/errno.h>
|
|
#include <linux/ioport.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/module.h>
|
|
#include <linux/init.h>
|
|
#include <linux/gameport.h>
|
|
|
|
#define L4_PORT 0x201
|
|
#define L4_SELECT_ANALOG 0xa4
|
|
#define L4_SELECT_DIGITAL 0xa5
|
|
#define L4_SELECT_SECONDARY 0xa6
|
|
#define L4_CMD_ID 0x80
|
|
#define L4_CMD_GETCAL 0x92
|
|
#define L4_CMD_SETCAL 0x93
|
|
#define L4_ID 0x04
|
|
#define L4_BUSY 0x01
|
|
#define L4_TIMEOUT 80 /* 80 us */
|
|
|
|
MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
|
|
MODULE_DESCRIPTION("PDPI Lightning 4 gamecard driver");
|
|
MODULE_LICENSE("GPL");
|
|
|
|
struct l4 {
|
|
struct gameport *gameport;
|
|
unsigned char port;
|
|
};
|
|
|
|
static struct l4 l4_ports[8];
|
|
|
|
/*
|
|
* l4_wait_ready() waits for the L4 to become ready.
|
|
*/
|
|
|
|
static int l4_wait_ready(void)
|
|
{
|
|
unsigned int t = L4_TIMEOUT;
|
|
|
|
while ((inb(L4_PORT) & L4_BUSY) && t > 0) t--;
|
|
return -(t <= 0);
|
|
}
|
|
|
|
/*
|
|
* l4_cooked_read() reads data from the Lightning 4.
|
|
*/
|
|
|
|
static int l4_cooked_read(struct gameport *gameport, int *axes, int *buttons)
|
|
{
|
|
struct l4 *l4 = gameport->port_data;
|
|
unsigned char status;
|
|
int i, result = -1;
|
|
|
|
outb(L4_SELECT_ANALOG, L4_PORT);
|
|
outb(L4_SELECT_DIGITAL + (l4->port >> 2), L4_PORT);
|
|
|
|
if (inb(L4_PORT) & L4_BUSY) goto fail;
|
|
outb(l4->port & 3, L4_PORT);
|
|
|
|
if (l4_wait_ready()) goto fail;
|
|
status = inb(L4_PORT);
|
|
|
|
for (i = 0; i < 4; i++)
|
|
if (status & (1 << i)) {
|
|
if (l4_wait_ready()) goto fail;
|
|
axes[i] = inb(L4_PORT);
|
|
if (axes[i] > 252) axes[i] = -1;
|
|
}
|
|
|
|
if (status & 0x10) {
|
|
if (l4_wait_ready()) goto fail;
|
|
*buttons = inb(L4_PORT) & 0x0f;
|
|
}
|
|
|
|
result = 0;
|
|
|
|
fail: outb(L4_SELECT_ANALOG, L4_PORT);
|
|
return result;
|
|
}
|
|
|
|
static int l4_open(struct gameport *gameport, int mode)
|
|
{
|
|
struct l4 *l4 = gameport->port_data;
|
|
|
|
if (l4->port != 0 && mode != GAMEPORT_MODE_COOKED)
|
|
return -1;
|
|
outb(L4_SELECT_ANALOG, L4_PORT);
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* l4_getcal() reads the L4 with calibration values.
|
|
*/
|
|
|
|
static int l4_getcal(int port, int *cal)
|
|
{
|
|
int i, result = -1;
|
|
|
|
outb(L4_SELECT_ANALOG, L4_PORT);
|
|
outb(L4_SELECT_DIGITAL + (port >> 2), L4_PORT);
|
|
if (inb(L4_PORT) & L4_BUSY)
|
|
goto out;
|
|
|
|
outb(L4_CMD_GETCAL, L4_PORT);
|
|
if (l4_wait_ready())
|
|
goto out;
|
|
|
|
if (inb(L4_PORT) != L4_SELECT_DIGITAL + (port >> 2))
|
|
goto out;
|
|
|
|
if (l4_wait_ready())
|
|
goto out;
|
|
outb(port & 3, L4_PORT);
|
|
|
|
for (i = 0; i < 4; i++) {
|
|
if (l4_wait_ready())
|
|
goto out;
|
|
cal[i] = inb(L4_PORT);
|
|
}
|
|
|
|
result = 0;
|
|
|
|
out: outb(L4_SELECT_ANALOG, L4_PORT);
|
|
return result;
|
|
}
|
|
|
|
/*
|
|
* l4_setcal() programs the L4 with calibration values.
|
|
*/
|
|
|
|
static int l4_setcal(int port, int *cal)
|
|
{
|
|
int i, result = -1;
|
|
|
|
outb(L4_SELECT_ANALOG, L4_PORT);
|
|
outb(L4_SELECT_DIGITAL + (port >> 2), L4_PORT);
|
|
if (inb(L4_PORT) & L4_BUSY)
|
|
goto out;
|
|
|
|
outb(L4_CMD_SETCAL, L4_PORT);
|
|
if (l4_wait_ready())
|
|
goto out;
|
|
|
|
if (inb(L4_PORT) != L4_SELECT_DIGITAL + (port >> 2))
|
|
goto out;
|
|
|
|
if (l4_wait_ready())
|
|
goto out;
|
|
outb(port & 3, L4_PORT);
|
|
|
|
for (i = 0; i < 4; i++) {
|
|
if (l4_wait_ready())
|
|
goto out;
|
|
outb(cal[i], L4_PORT);
|
|
}
|
|
|
|
result = 0;
|
|
|
|
out: outb(L4_SELECT_ANALOG, L4_PORT);
|
|
return result;
|
|
}
|
|
|
|
/*
|
|
* l4_calibrate() calibrates the L4 for the attached device, so
|
|
* that the device's resistance fits into the L4's 8-bit range.
|
|
*/
|
|
|
|
static int l4_calibrate(struct gameport *gameport, int *axes, int *max)
|
|
{
|
|
int i, t;
|
|
int cal[4];
|
|
struct l4 *l4 = gameport->port_data;
|
|
|
|
if (l4_getcal(l4->port, cal))
|
|
return -1;
|
|
|
|
for (i = 0; i < 4; i++) {
|
|
t = (max[i] * cal[i]) / 200;
|
|
t = (t < 1) ? 1 : ((t > 255) ? 255 : t);
|
|
axes[i] = (axes[i] < 0) ? -1 : (axes[i] * cal[i]) / t;
|
|
axes[i] = (axes[i] > 252) ? 252 : axes[i];
|
|
cal[i] = t;
|
|
}
|
|
|
|
if (l4_setcal(l4->port, cal))
|
|
return -1;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int __init l4_create_ports(int card_no)
|
|
{
|
|
struct l4 *l4;
|
|
struct gameport *port;
|
|
int i, idx;
|
|
|
|
for (i = 0; i < 4; i++) {
|
|
|
|
idx = card_no * 4 + i;
|
|
l4 = &l4_ports[idx];
|
|
|
|
if (!(l4->gameport = port = gameport_allocate_port())) {
|
|
printk(KERN_ERR "lightning: Memory allocation failed\n");
|
|
while (--i >= 0) {
|
|
gameport_free_port(l4->gameport);
|
|
l4->gameport = NULL;
|
|
}
|
|
return -ENOMEM;
|
|
}
|
|
l4->port = idx;
|
|
|
|
port->port_data = l4;
|
|
port->open = l4_open;
|
|
port->cooked_read = l4_cooked_read;
|
|
port->calibrate = l4_calibrate;
|
|
|
|
gameport_set_name(port, "PDPI Lightning 4");
|
|
gameport_set_phys(port, "isa%04x/gameport%d", L4_PORT, idx);
|
|
|
|
if (idx == 0)
|
|
port->io = L4_PORT;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int __init l4_add_card(int card_no)
|
|
{
|
|
int cal[4] = { 255, 255, 255, 255 };
|
|
int i, rev, result;
|
|
struct l4 *l4;
|
|
|
|
outb(L4_SELECT_ANALOG, L4_PORT);
|
|
outb(L4_SELECT_DIGITAL + card_no, L4_PORT);
|
|
|
|
if (inb(L4_PORT) & L4_BUSY)
|
|
return -1;
|
|
outb(L4_CMD_ID, L4_PORT);
|
|
|
|
if (l4_wait_ready())
|
|
return -1;
|
|
|
|
if (inb(L4_PORT) != L4_SELECT_DIGITAL + card_no)
|
|
return -1;
|
|
|
|
if (l4_wait_ready())
|
|
return -1;
|
|
if (inb(L4_PORT) != L4_ID)
|
|
return -1;
|
|
|
|
if (l4_wait_ready())
|
|
return -1;
|
|
rev = inb(L4_PORT);
|
|
|
|
if (!rev)
|
|
return -1;
|
|
|
|
result = l4_create_ports(card_no);
|
|
if (result)
|
|
return result;
|
|
|
|
printk(KERN_INFO "gameport: PDPI Lightning 4 %s card v%d.%d at %#x\n",
|
|
card_no ? "secondary" : "primary", rev >> 4, rev, L4_PORT);
|
|
|
|
for (i = 0; i < 4; i++) {
|
|
l4 = &l4_ports[card_no * 4 + i];
|
|
|
|
if (rev > 0x28) /* on 2.9+ the setcal command works correctly */
|
|
l4_setcal(l4->port, cal);
|
|
gameport_register_port(l4->gameport);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int __init l4_init(void)
|
|
{
|
|
int i, cards = 0;
|
|
|
|
if (!request_region(L4_PORT, 1, "lightning"))
|
|
return -EBUSY;
|
|
|
|
for (i = 0; i < 2; i++)
|
|
if (l4_add_card(i) == 0)
|
|
cards++;
|
|
|
|
outb(L4_SELECT_ANALOG, L4_PORT);
|
|
|
|
if (!cards) {
|
|
release_region(L4_PORT, 1);
|
|
return -ENODEV;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void __exit l4_exit(void)
|
|
{
|
|
int i;
|
|
int cal[4] = { 59, 59, 59, 59 };
|
|
|
|
for (i = 0; i < 8; i++)
|
|
if (l4_ports[i].gameport) {
|
|
l4_setcal(l4_ports[i].port, cal);
|
|
gameport_unregister_port(l4_ports[i].gameport);
|
|
}
|
|
|
|
outb(L4_SELECT_ANALOG, L4_PORT);
|
|
release_region(L4_PORT, 1);
|
|
}
|
|
|
|
module_init(l4_init);
|
|
module_exit(l4_exit);
|