1 files changed, 121 insertions, 0 deletions
diff --git a/sound/pci/au88x0/au88x0_game.c b/sound/pci/au88x0/au88x0_game.c
new file mode 100644
index 000000000..51c154e34
--- /dev/null
+++ b/sound/pci/au88x0/au88x0_game.c
@@ -0,0 +1,121 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ *  Manuel Jander.
+ *
+ *  Based on the work of:
+ *  Vojtech Pavlik
+ *  Raymond Ingles
+ *
+ * Should you need to contact me, the author, you can do so either by
+ * e-mail - mail your message to <vojtech@suse.cz>, or by paper mail:
+ * Vojtech Pavlik, Ucitelska 1576, Prague 8, 182 00 Czech Republic
+ *
+ * Based 90% on Vojtech Pavlik pcigame driver.
+ * Merged and modified by Manuel Jander, for the OpenVortex
+ * driver. (email: mjander@embedded.cl).
+ */
+
+#include <linux/time.h>
+#include <linux/delay.h>
+#include <linux/init.h>
+#include <sound/core.h>
+#include "au88x0.h"
+#include <linux/gameport.h>
+#include <linux/export.h>
+
+#if IS_REACHABLE(CONFIG_GAMEPORT)
+
+#define VORTEX_GAME_DWAIT	20	/* 20 ms */
+
+static unsigned char vortex_game_read(struct gameport *gameport)
+{
+	vortex_t *vortex = gameport_get_port_data(gameport);
+	return hwread(vortex->mmio, VORTEX_GAME_LEGACY);
+}
+
+static void vortex_game_trigger(struct gameport *gameport)
+{
+	vortex_t *vortex = gameport_get_port_data(gameport);
+	hwwrite(vortex->mmio, VORTEX_GAME_LEGACY, 0xff);
+}
+
+static int
+vortex_game_cooked_read(struct gameport *gameport, int *axes, int *buttons)
+{
+	vortex_t *vortex = gameport_get_port_data(gameport);
+	int i;
+
+	*buttons = (~hwread(vortex->mmio, VORTEX_GAME_LEGACY) >> 4) & 0xf;
+
+	for (i = 0; i < 4; i++) {
+		axes[i] =
+		    hwread(vortex->mmio, VORTEX_GAME_AXIS + (i * AXIS_SIZE));
+		if (axes[i] == AXIS_RANGE)
+			axes[i] = -1;
+	}
+	return 0;
+}
+
+static int vortex_game_open(struct gameport *gameport, int mode)
+{
+	vortex_t *vortex = gameport_get_port_data(gameport);
+
+	switch (mode) {
+	case GAMEPORT_MODE_COOKED:
+		hwwrite(vortex->mmio, VORTEX_CTRL2,
+			hwread(vortex->mmio,
+			       VORTEX_CTRL2) | CTRL2_GAME_ADCMODE);
+		msleep(VORTEX_GAME_DWAIT);
+		return 0;
+	case GAMEPORT_MODE_RAW:
+		hwwrite(vortex->mmio, VORTEX_CTRL2,
+			hwread(vortex->mmio,
+			       VORTEX_CTRL2) & ~CTRL2_GAME_ADCMODE);
+		return 0;
+	default:
+		return -1;
+	}
+
+	return 0;
+}
+
+static int vortex_gameport_register(vortex_t *vortex)
+{
+	struct gameport *gp;
+
+	vortex->gameport = gp = gameport_allocate_port();
+	if (!gp) {
+		dev_err(vortex->card->dev,
+			"cannot allocate memory for gameport\n");
+		return -ENOMEM;
+	}
+
+	gameport_set_name(gp, "AU88x0 Gameport");
+	gameport_set_phys(gp, "pci%s/gameport0", pci_name(vortex->pci_dev));
+	gameport_set_dev_parent(gp, &vortex->pci_dev->dev);
+
+	gp->read = vortex_game_read;
+	gp->trigger = vortex_game_trigger;
+	gp->cooked_read = vortex_game_cooked_read;
+	gp->open = vortex_game_open;
+
+	gameport_set_port_data(gp, vortex);
+	gp->fuzz = 64;
+
+	gameport_register_port(gp);
+
+	return 0;
+}
+
+static void vortex_gameport_unregister(vortex_t * vortex)
+{
+	if (vortex->gameport) {
+		gameport_unregister_port(vortex->gameport);
+		vortex->gameport = NULL;
+	}
+}
+
+#else
+static inline int vortex_gameport_register(vortex_t * vortex) { return -ENOSYS; }
+static inline void vortex_gameport_unregister(vortex_t * vortex) { }
+#endif