1 files changed, 344 insertions, 0 deletions

diff --git a/drivers/input/gameport/lightning.c b/drivers/input/gameport/lightning.c
new file mode 100644
index 000000000000..d65d81080257
--- /dev/null
+++ b/drivers/input/gameport/lightning.c
@@ -0,0 +1,344 @@
+/*
+ * $Id: lightning.c,v 1.20 2002/01/22 20:41:31 vojtech Exp $
+ *
+ *  Copyright (c) 1998-2001 Vojtech Pavlik
+ */
+
+/*
+ * PDPI Lightning 4 gamecard driver for Linux.
+ */
+
+/*
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ *
+ * Should you need to contact me, the author, you can do so either by
+ * e-mail - mail your message to <vojtech@ucw.cz>, or by paper mail:
+ * Vojtech Pavlik, Simunkova 1594, Prague 8, 182 00 Czech Republic
+ */
+
+#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>
+#include <linux/slab.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 -1;
+
+        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 -1;
+        }
+
+        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);