--- /dev/null
+/*
+ * Copyright (c) 1999-2001 Vojtech Pavlik
+ */
+
+/*
+ * Creative Labs Blaster GamePad Cobra 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 <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/slab.h>
+#include <linux/gameport.h>
+#include <linux/input.h>
+#include <linux/jiffies.h>
+
+#define DRIVER_DESC "Creative Labs Blaster GamePad Cobra driver"
+
+MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
+MODULE_DESCRIPTION(DRIVER_DESC);
+MODULE_LICENSE("GPL");
+
+#define COBRA_MAX_STROBE 45 /* 45 us max wait for first strobe */
+#define COBRA_LENGTH 36
+
+static int cobra_btn[] = { BTN_START, BTN_SELECT, BTN_TL, BTN_TR, BTN_X, BTN_Y, BTN_Z, BTN_A, BTN_B, BTN_C, BTN_TL2, BTN_TR2, 0 };
+
+struct cobra {
+ struct gameport *gameport;
+ struct input_dev *dev[2];
+ int reads;
+ int bads;
+ unsigned char exists;
+ char phys[2][32];
+};
+
+static unsigned char cobra_read_packet(struct gameport *gameport, unsigned int *data)
+{
+ unsigned long flags;
+ unsigned char u, v, w;
+ __u64 buf[2];
+ int r[2], t[2];
+ int i, j, ret;
+
+ int strobe = gameport_time(gameport, COBRA_MAX_STROBE);
+
+ for (i = 0; i < 2; i++) {
+ r[i] = buf[i] = 0;
+ t[i] = COBRA_MAX_STROBE;
+ }
+
+ local_irq_save(flags);
+
+ u = gameport_read(gameport);
+
+ do {
+ t[0]--; t[1]--;
+ v = gameport_read(gameport);
+ for (i = 0, w = u ^ v; i < 2 && w; i++, w >>= 2)
+ if (w & 0x30) {
+ if ((w & 0x30) < 0x30 && r[i] < COBRA_LENGTH && t[i] > 0) {
+ buf[i] |= (__u64)((w >> 5) & 1) << r[i]++;
+ t[i] = strobe;
+ u = v;
+ } else t[i] = 0;
+ }
+ } while (t[0] > 0 || t[1] > 0);
+
+ local_irq_restore(flags);
+
+ ret = 0;
+
+ for (i = 0; i < 2; i++) {
+
+ if (r[i] != COBRA_LENGTH) continue;
+
+ for (j = 0; j < COBRA_LENGTH && (buf[i] & 0x04104107f) ^ 0x041041040; j++)
+ buf[i] = (buf[i] >> 1) | ((__u64)(buf[i] & 1) << (COBRA_LENGTH - 1));
+
+ if (j < COBRA_LENGTH) ret |= (1 << i);
+
+ data[i] = ((buf[i] >> 7) & 0x000001f) | ((buf[i] >> 8) & 0x00003e0)
+ | ((buf[i] >> 9) & 0x0007c00) | ((buf[i] >> 10) & 0x00f8000)
+ | ((buf[i] >> 11) & 0x1f00000);
+
+ }
+
+ return ret;
+}
+
+static void cobra_poll(struct gameport *gameport)
+{
+ struct cobra *cobra = gameport_get_drvdata(gameport);
+ struct input_dev *dev;
+ unsigned int data[2];
+ int i, j, r;
+
+ cobra->reads++;
+
+ if ((r = cobra_read_packet(gameport, data)) != cobra->exists) {
+ cobra->bads++;
+ return;
+ }
+
+ for (i = 0; i < 2; i++)
+ if (cobra->exists & r & (1 << i)) {
+
+ dev = cobra->dev[i];
+
+ input_report_abs(dev, ABS_X, ((data[i] >> 4) & 1) - ((data[i] >> 3) & 1));
+ input_report_abs(dev, ABS_Y, ((data[i] >> 2) & 1) - ((data[i] >> 1) & 1));
+
+ for (j = 0; cobra_btn[j]; j++)
+ input_report_key(dev, cobra_btn[j], data[i] & (0x20 << j));
+
+ input_sync(dev);
+
+ }
+}
+
+static int cobra_open(struct input_dev *dev)
+{
+ struct cobra *cobra = input_get_drvdata(dev);
+
+ gameport_start_polling(cobra->gameport);
+ return 0;
+}
+
+static void cobra_close(struct input_dev *dev)
+{
+ struct cobra *cobra = input_get_drvdata(dev);
+
+ gameport_stop_polling(cobra->gameport);
+}
+
+static int cobra_connect(struct gameport *gameport, struct gameport_driver *drv)
+{
+ struct cobra *cobra;
+ struct input_dev *input_dev;
+ unsigned int data[2];
+ int i, j;
+ int err;
+
+ cobra = kzalloc(sizeof(struct cobra), GFP_KERNEL);
+ if (!cobra)
+ return -ENOMEM;
+
+ cobra->gameport = gameport;
+
+ gameport_set_drvdata(gameport, cobra);
+
+ err = gameport_open(gameport, drv, GAMEPORT_MODE_RAW);
+ if (err)
+ goto fail1;
+
+ cobra->exists = cobra_read_packet(gameport, data);
+
+ for (i = 0; i < 2; i++)
+ if ((cobra->exists >> i) & data[i] & 1) {
+ printk(KERN_WARNING "cobra.c: Device %d on %s has the Ext bit set. ID is: %d"
+ " Contact vojtech@ucw.cz\n", i, gameport->phys, (data[i] >> 2) & 7);
+ cobra->exists &= ~(1 << i);
+ }
+
+ if (!cobra->exists) {
+ err = -ENODEV;
+ goto fail2;
+ }
+
+ gameport_set_poll_handler(gameport, cobra_poll);
+ gameport_set_poll_interval(gameport, 20);
+
+ for (i = 0; i < 2; i++) {
+ if (~(cobra->exists >> i) & 1)
+ continue;
+
+ cobra->dev[i] = input_dev = input_allocate_device();
+ if (!input_dev) {
+ err = -ENOMEM;
+ goto fail3;
+ }
+
+ snprintf(cobra->phys[i], sizeof(cobra->phys[i]),
+ "%s/input%d", gameport->phys, i);
+
+ input_dev->name = "Creative Labs Blaster GamePad Cobra";
+ input_dev->phys = cobra->phys[i];
+ input_dev->id.bustype = BUS_GAMEPORT;
+ input_dev->id.vendor = GAMEPORT_ID_VENDOR_CREATIVE;
+ input_dev->id.product = 0x0008;
+ input_dev->id.version = 0x0100;
+ input_dev->dev.parent = &gameport->dev;
+
+ input_set_drvdata(input_dev, cobra);
+
+ input_dev->open = cobra_open;
+ input_dev->close = cobra_close;
+
+ input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);
+ input_set_abs_params(input_dev, ABS_X, -1, 1, 0, 0);
+ input_set_abs_params(input_dev, ABS_Y, -1, 1, 0, 0);
+ for (j = 0; cobra_btn[j]; j++)
+ set_bit(cobra_btn[j], input_dev->keybit);
+
+ err = input_register_device(cobra->dev[i]);
+ if (err)
+ goto fail4;
+ }
+
+ return 0;
+
+ fail4: input_free_device(cobra->dev[i]);
+ fail3: while (--i >= 0)
+ if (cobra->dev[i])
+ input_unregister_device(cobra->dev[i]);
+ fail2: gameport_close(gameport);
+ fail1: gameport_set_drvdata(gameport, NULL);
+ kfree(cobra);
+ return err;
+}
+
+static void cobra_disconnect(struct gameport *gameport)
+{
+ struct cobra *cobra = gameport_get_drvdata(gameport);
+ int i;
+
+ for (i = 0; i < 2; i++)
+ if ((cobra->exists >> i) & 1)
+ input_unregister_device(cobra->dev[i]);
+ gameport_close(gameport);
+ gameport_set_drvdata(gameport, NULL);
+ kfree(cobra);
+}
+
+static struct gameport_driver cobra_drv = {
+ .driver = {
+ .name = "cobra",
+ },
+ .description = DRIVER_DESC,
+ .connect = cobra_connect,
+ .disconnect = cobra_disconnect,
+};
+
+module_gameport_driver(cobra_drv);
Code Review / kvmfornfv.git / blobdiff