Resguardo inicial

linux-7.2.3/drivers/input/joystick/iforce/Kconfig

@@ -0,0 +1,33 @@
+# SPDX-License-Identifier: GPL-2.0-only
+#
+# I-Force driver configuration
+#
+config JOYSTICK_IFORCE
+	tristate "I-Force devices"
+	depends on INPUT && INPUT_JOYSTICK
+	help
+	  Say Y here if you have an I-Force joystick or steering wheel
+
+	  You also must choose at least one of the two options below.
+
+	  To compile this driver as a module, choose M here: the
+	  module will be called iforce.
+
+config JOYSTICK_IFORCE_USB
+	tristate "I-Force USB joysticks and wheels"
+	depends on JOYSTICK_IFORCE && USB
+	help
+	  Say Y here if you have an I-Force joystick or steering wheel
+	  connected to your USB port.
+
+config JOYSTICK_IFORCE_232
+	tristate "I-Force Serial joysticks and wheels"
+	depends on JOYSTICK_IFORCE && SERIO
+	help
+	  Say Y here if you have an I-Force joystick or steering wheel
+	  connected to your serial (COM) port.
+
+	  You will need an additional utility called inputattach, see
+	  <file:Documentation/input/joydev/joystick.rst>
+	  and <file:Documentation/input/ff.rst>.
+

linux-7.2.3/drivers/input/joystick/iforce/Makefile

@@ -0,0 +1,11 @@
+# SPDX-License-Identifier: GPL-2.0-only
+#
+# Makefile for the I-Force driver
+#
+# By Johann Deneux <johann.deneux@gmail.com>
+#
+
+obj-$(CONFIG_JOYSTICK_IFORCE)		+= iforce.o
+iforce-y := iforce-ff.o iforce-main.o iforce-packets.o
+obj-$(CONFIG_JOYSTICK_IFORCE_232)	+= iforce-serio.o
+obj-$(CONFIG_JOYSTICK_IFORCE_USB)	+= iforce-usb.o

linux-7.2.3/drivers/input/joystick/iforce/iforce-ff.c

@@ -0,0 +1,520 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ *  Copyright (c) 2000-2002 Vojtech Pavlik <vojtech@ucw.cz>
+ *  Copyright (c) 2001-2002, 2007 Johann Deneux <johann.deneux@gmail.com>
+ *
+ *  USB/RS232 I-Force joysticks and wheels.
+ */
+
+#include "iforce.h"
+
+/*
+ * Set the magnitude of a constant force effect
+ * Return error code
+ *
+ * Note: caller must ensure exclusive access to device
+ */
+
+static int make_magnitude_modifier(struct iforce* iforce,
+	struct resource* mod_chunk, int no_alloc, __s16 level)
+{
+	unsigned char data[3];
+
+	if (!no_alloc) {
+		guard(mutex)(&iforce->mem_mutex);
+
+		if (allocate_resource(&iforce->device_memory, mod_chunk, 2,
+				      iforce->device_memory.start,
+				      iforce->device_memory.end,
+				      2L, NULL, NULL))
+			return -ENOSPC;
+	}
+
+	data[0] = LO(mod_chunk->start);
+	data[1] = HI(mod_chunk->start);
+	data[2] = HIFIX80(level);
+
+	iforce_send_packet(iforce, FF_CMD_MAGNITUDE, data);
+
+	iforce_dump_packet(iforce, "magnitude", FF_CMD_MAGNITUDE, data);
+	return 0;
+}
+
+/*
+ * Upload the component of an effect dealing with the period, phase and magnitude
+ */
+
+static int make_period_modifier(struct iforce* iforce,
+	struct resource* mod_chunk, int no_alloc,
+	__s16 magnitude, __s16 offset, u16 period, u16 phase)
+{
+	unsigned char data[7];
+
+	period = TIME_SCALE(period);
+
+	if (!no_alloc) {
+		guard(mutex)(&iforce->mem_mutex);
+
+		if (allocate_resource(&iforce->device_memory, mod_chunk, 0x0c,
+				      iforce->device_memory.start,
+				      iforce->device_memory.end,
+				      2L, NULL, NULL))
+			return -ENOSPC;
+	}
+
+	data[0] = LO(mod_chunk->start);
+	data[1] = HI(mod_chunk->start);
+
+	data[2] = HIFIX80(magnitude);
+	data[3] = HIFIX80(offset);
+	data[4] = HI(phase);
+
+	data[5] = LO(period);
+	data[6] = HI(period);
+
+	iforce_send_packet(iforce, FF_CMD_PERIOD, data);
+
+	return 0;
+}
+
+/*
+ * Uploads the part of an effect setting the envelope of the force
+ */
+
+static int make_envelope_modifier(struct iforce* iforce,
+	struct resource* mod_chunk, int no_alloc,
+	u16 attack_duration, __s16 initial_level,
+	u16 fade_duration, __s16 final_level)
+{
+	unsigned char data[8];
+
+	attack_duration = TIME_SCALE(attack_duration);
+	fade_duration = TIME_SCALE(fade_duration);
+
+	if (!no_alloc) {
+		guard(mutex)(&iforce->mem_mutex);
+
+		if (allocate_resource(&(iforce->device_memory), mod_chunk, 0x0e,
+				      iforce->device_memory.start,
+				      iforce->device_memory.end,
+				      2L, NULL, NULL))
+			return -ENOSPC;
+	}
+
+	data[0] = LO(mod_chunk->start);
+	data[1] = HI(mod_chunk->start);
+
+	data[2] = LO(attack_duration);
+	data[3] = HI(attack_duration);
+	data[4] = HI(initial_level);
+
+	data[5] = LO(fade_duration);
+	data[6] = HI(fade_duration);
+	data[7] = HI(final_level);
+
+	iforce_send_packet(iforce, FF_CMD_ENVELOPE, data);
+
+	return 0;
+}
+
+/*
+ * Component of spring, friction, inertia... effects
+ */
+
+static int make_condition_modifier(struct iforce* iforce,
+	struct resource* mod_chunk, int no_alloc,
+	__u16 rsat, __u16 lsat, __s16 rk, __s16 lk, u16 db, __s16 center)
+{
+	unsigned char data[10];
+
+	if (!no_alloc) {
+		guard(mutex)(&iforce->mem_mutex);
+
+		if (allocate_resource(&(iforce->device_memory), mod_chunk, 8,
+				      iforce->device_memory.start,
+				      iforce->device_memory.end,
+				      2L, NULL, NULL))
+			return -ENOSPC;
+	}
+
+	data[0] = LO(mod_chunk->start);
+	data[1] = HI(mod_chunk->start);
+
+	data[2] = (100 * rk) >> 15;	/* Dangerous: the sign is extended by gcc on plateforms providing an arith shift */
+	data[3] = (100 * lk) >> 15; /* This code is incorrect on cpus lacking arith shift */
+
+	center = (500 * center) >> 15;
+	data[4] = LO(center);
+	data[5] = HI(center);
+
+	db = (1000 * db) >> 16;
+	data[6] = LO(db);
+	data[7] = HI(db);
+
+	data[8] = (100 * rsat) >> 16;
+	data[9] = (100 * lsat) >> 16;
+
+	iforce_send_packet(iforce, FF_CMD_CONDITION, data);
+	iforce_dump_packet(iforce, "condition", FF_CMD_CONDITION, data);
+
+	return 0;
+}
+
+static unsigned char find_button(struct iforce *iforce, signed short button)
+{
+	int i;
+
+	for (i = 1; iforce->type->btn[i] >= 0; i++)
+		if (iforce->type->btn[i] == button)
+			return i + 1;
+	return 0;
+}
+
+/*
+ * Analyse the changes in an effect, and tell if we need to send an condition
+ * parameter packet
+ */
+static int need_condition_modifier(struct iforce *iforce,
+				   struct ff_effect *old,
+				   struct ff_effect *new)
+{
+	int ret = 0;
+	int i;
+
+	if (new->type != FF_SPRING && new->type != FF_FRICTION) {
+		dev_warn(&iforce->dev->dev, "bad effect type in %s\n",
+			 __func__);
+		return 0;
+	}
+
+	for (i = 0; i < 2; i++) {
+		ret |= old->u.condition[i].right_saturation != new->u.condition[i].right_saturation
+			|| old->u.condition[i].left_saturation != new->u.condition[i].left_saturation
+			|| old->u.condition[i].right_coeff != new->u.condition[i].right_coeff
+			|| old->u.condition[i].left_coeff != new->u.condition[i].left_coeff
+			|| old->u.condition[i].deadband != new->u.condition[i].deadband
+			|| old->u.condition[i].center != new->u.condition[i].center;
+	}
+	return ret;
+}
+
+/*
+ * Analyse the changes in an effect, and tell if we need to send a magnitude
+ * parameter packet
+ */
+static int need_magnitude_modifier(struct iforce *iforce,
+				   struct ff_effect *old,
+				   struct ff_effect *effect)
+{
+	if (effect->type != FF_CONSTANT) {
+		dev_warn(&iforce->dev->dev, "bad effect type in %s\n",
+			 __func__);
+		return 0;
+	}
+
+	return old->u.constant.level != effect->u.constant.level;
+}
+
+/*
+ * Analyse the changes in an effect, and tell if we need to send an envelope
+ * parameter packet
+ */
+static int need_envelope_modifier(struct iforce *iforce, struct ff_effect *old,
+				  struct ff_effect *effect)
+{
+	switch (effect->type) {
+	case FF_CONSTANT:
+		if (old->u.constant.envelope.attack_length != effect->u.constant.envelope.attack_length
+		|| old->u.constant.envelope.attack_level != effect->u.constant.envelope.attack_level
+		|| old->u.constant.envelope.fade_length != effect->u.constant.envelope.fade_length
+		|| old->u.constant.envelope.fade_level != effect->u.constant.envelope.fade_level)
+			return 1;
+		break;
+
+	case FF_PERIODIC:
+		if (old->u.periodic.envelope.attack_length != effect->u.periodic.envelope.attack_length
+		|| old->u.periodic.envelope.attack_level != effect->u.periodic.envelope.attack_level
+		|| old->u.periodic.envelope.fade_length != effect->u.periodic.envelope.fade_length
+		|| old->u.periodic.envelope.fade_level != effect->u.periodic.envelope.fade_level)
+			return 1;
+		break;
+
+	default:
+		dev_warn(&iforce->dev->dev, "bad effect type in %s\n",
+			 __func__);
+	}
+
+	return 0;
+}
+
+/*
+ * Analyse the changes in an effect, and tell if we need to send a periodic
+ * parameter effect
+ */
+static int need_period_modifier(struct iforce *iforce, struct ff_effect *old,
+				struct ff_effect *new)
+{
+	if (new->type != FF_PERIODIC) {
+		dev_warn(&iforce->dev->dev, "bad effect type in %s\n",
+			 __func__);
+		return 0;
+	}
+	return (old->u.periodic.period != new->u.periodic.period
+		|| old->u.periodic.magnitude != new->u.periodic.magnitude
+		|| old->u.periodic.offset != new->u.periodic.offset
+		|| old->u.periodic.phase != new->u.periodic.phase);
+}
+
+/*
+ * Analyse the changes in an effect, and tell if we need to send an effect
+ * packet
+ */
+static int need_core(struct ff_effect *old, struct ff_effect *new)
+{
+	if (old->direction != new->direction
+		|| old->trigger.button != new->trigger.button
+		|| old->trigger.interval != new->trigger.interval
+		|| old->replay.length != new->replay.length
+		|| old->replay.delay != new->replay.delay)
+		return 1;
+
+	return 0;
+}
+/*
+ * Send the part common to all effects to the device
+ */
+static int make_core(struct iforce* iforce, u16 id, u16 mod_id1, u16 mod_id2,
+	u8 effect_type, u8 axes, u16 duration, u16 delay, u16 button,
+	u16 interval, u16 direction)
+{
+	unsigned char data[14];
+
+	duration = TIME_SCALE(duration);
+	delay    = TIME_SCALE(delay);
+	interval = TIME_SCALE(interval);
+
+	data[0]  = LO(id);
+	data[1]  = effect_type;
+	data[2]  = LO(axes) | find_button(iforce, button);
+
+	data[3]  = LO(duration);
+	data[4]  = HI(duration);
+
+	data[5]  = HI(direction);
+
+	data[6]  = LO(interval);
+	data[7]  = HI(interval);
+
+	data[8]  = LO(mod_id1);
+	data[9]  = HI(mod_id1);
+	data[10] = LO(mod_id2);
+	data[11] = HI(mod_id2);
+
+	data[12] = LO(delay);
+	data[13] = HI(delay);
+
+	/* Stop effect */
+/*	iforce_control_playback(iforce, id, 0);*/
+
+	iforce_send_packet(iforce, FF_CMD_EFFECT, data);
+
+	/* If needed, restart effect */
+	if (test_bit(FF_CORE_SHOULD_PLAY, iforce->core_effects[id].flags)) {
+		/* BUG: perhaps we should replay n times, instead of 1. But we do not know n */
+		iforce_control_playback(iforce, id, 1);
+	}
+
+	return 0;
+}
+
+/*
+ * Upload a periodic effect to the device
+ * See also iforce_upload_constant.
+ */
+int iforce_upload_periodic(struct iforce *iforce, struct ff_effect *effect, struct ff_effect *old)
+{
+	u8 wave_code;
+	int core_id = effect->id;
+	struct iforce_core_effect* core_effect = iforce->core_effects + core_id;
+	struct resource* mod1_chunk = &(iforce->core_effects[core_id].mod1_chunk);
+	struct resource* mod2_chunk = &(iforce->core_effects[core_id].mod2_chunk);
+	int param1_err = 1;
+	int param2_err = 1;
+	int core_err = 0;
+
+	if (!old || need_period_modifier(iforce, old, effect)) {
+		param1_err = make_period_modifier(iforce, mod1_chunk,
+			old != NULL,
+			effect->u.periodic.magnitude, effect->u.periodic.offset,
+			effect->u.periodic.period, effect->u.periodic.phase);
+		if (param1_err)
+			return param1_err;
+		set_bit(FF_MOD1_IS_USED, core_effect->flags);
+	}
+
+	if (!old || need_envelope_modifier(iforce, old, effect)) {
+		param2_err = make_envelope_modifier(iforce, mod2_chunk,
+			old !=NULL,
+			effect->u.periodic.envelope.attack_length,
+			effect->u.periodic.envelope.attack_level,
+			effect->u.periodic.envelope.fade_length,
+			effect->u.periodic.envelope.fade_level);
+		if (param2_err)
+			return param2_err;
+		set_bit(FF_MOD2_IS_USED, core_effect->flags);
+	}
+
+	switch (effect->u.periodic.waveform) {
+	case FF_SQUARE:		wave_code = 0x20; break;
+	case FF_TRIANGLE:	wave_code = 0x21; break;
+	case FF_SINE:		wave_code = 0x22; break;
+	case FF_SAW_UP:		wave_code = 0x23; break;
+	case FF_SAW_DOWN:	wave_code = 0x24; break;
+	default:		wave_code = 0x20; break;
+	}
+
+	if (!old || need_core(old, effect)) {
+		core_err = make_core(iforce, effect->id,
+			mod1_chunk->start,
+			mod2_chunk->start,
+			wave_code,
+			0x20,
+			effect->replay.length,
+			effect->replay.delay,
+			effect->trigger.button,
+			effect->trigger.interval,
+			effect->direction);
+	}
+
+	/* If one of the parameter creation failed, we already returned an
+	 * error code.
+	 * If the core creation failed, we return its error code.
+	 * Else: if one parameter at least was created, we return 0
+	 *       else we return 1;
+	 */
+	return core_err < 0 ? core_err : (param1_err && param2_err);
+}
+
+/*
+ * Upload a constant force effect
+ * Return value:
+ *  <0 Error code
+ *  0 Ok, effect created or updated
+ *  1 effect did not change since last upload, and no packet was therefore sent
+ */
+int iforce_upload_constant(struct iforce *iforce, struct ff_effect *effect, struct ff_effect *old)
+{
+	int core_id = effect->id;
+	struct iforce_core_effect* core_effect = iforce->core_effects + core_id;
+	struct resource* mod1_chunk = &(iforce->core_effects[core_id].mod1_chunk);
+	struct resource* mod2_chunk = &(iforce->core_effects[core_id].mod2_chunk);
+	int param1_err = 1;
+	int param2_err = 1;
+	int core_err = 0;
+
+	if (!old || need_magnitude_modifier(iforce, old, effect)) {
+		param1_err = make_magnitude_modifier(iforce, mod1_chunk,
+			old != NULL,
+			effect->u.constant.level);
+		if (param1_err)
+			return param1_err;
+		set_bit(FF_MOD1_IS_USED, core_effect->flags);
+	}
+
+	if (!old || need_envelope_modifier(iforce, old, effect)) {
+		param2_err = make_envelope_modifier(iforce, mod2_chunk,
+			old != NULL,
+			effect->u.constant.envelope.attack_length,
+			effect->u.constant.envelope.attack_level,
+			effect->u.constant.envelope.fade_length,
+			effect->u.constant.envelope.fade_level);
+		if (param2_err)
+			return param2_err;
+		set_bit(FF_MOD2_IS_USED, core_effect->flags);
+	}
+
+	if (!old || need_core(old, effect)) {
+		core_err = make_core(iforce, effect->id,
+			mod1_chunk->start,
+			mod2_chunk->start,
+			0x00,
+			0x20,
+			effect->replay.length,
+			effect->replay.delay,
+			effect->trigger.button,
+			effect->trigger.interval,
+			effect->direction);
+	}
+
+	/* If one of the parameter creation failed, we already returned an
+	 * error code.
+	 * If the core creation failed, we return its error code.
+	 * Else: if one parameter at least was created, we return 0
+	 *       else we return 1;
+	 */
+	return core_err < 0 ? core_err : (param1_err && param2_err);
+}
+
+/*
+ * Upload an condition effect. Those are for example friction, inertia, springs...
+ */
+int iforce_upload_condition(struct iforce *iforce, struct ff_effect *effect, struct ff_effect *old)
+{
+	int core_id = effect->id;
+	struct iforce_core_effect* core_effect = iforce->core_effects + core_id;
+	struct resource* mod1_chunk = &(core_effect->mod1_chunk);
+	struct resource* mod2_chunk = &(core_effect->mod2_chunk);
+	u8 type;
+	int param_err = 1;
+	int core_err = 0;
+
+	switch (effect->type) {
+	case FF_SPRING:	type = 0x40; break;
+	case FF_DAMPER:	type = 0x41; break;
+	default: return -1;
+	}
+
+	if (!old || need_condition_modifier(iforce, old, effect)) {
+		param_err = make_condition_modifier(iforce, mod1_chunk,
+			old != NULL,
+			effect->u.condition[0].right_saturation,
+			effect->u.condition[0].left_saturation,
+			effect->u.condition[0].right_coeff,
+			effect->u.condition[0].left_coeff,
+			effect->u.condition[0].deadband,
+			effect->u.condition[0].center);
+		if (param_err)
+			return param_err;
+		set_bit(FF_MOD1_IS_USED, core_effect->flags);
+
+		param_err = make_condition_modifier(iforce, mod2_chunk,
+			old != NULL,
+			effect->u.condition[1].right_saturation,
+			effect->u.condition[1].left_saturation,
+			effect->u.condition[1].right_coeff,
+			effect->u.condition[1].left_coeff,
+			effect->u.condition[1].deadband,
+			effect->u.condition[1].center);
+		if (param_err)
+			return param_err;
+		set_bit(FF_MOD2_IS_USED, core_effect->flags);
+
+	}
+
+	if (!old || need_core(old, effect)) {
+		core_err = make_core(iforce, effect->id,
+			mod1_chunk->start, mod2_chunk->start,
+			type, 0xc0,
+			effect->replay.length, effect->replay.delay,
+			effect->trigger.button, effect->trigger.interval,
+			effect->direction);
+	}
+
+	/* If the parameter creation failed, we already returned an
+	 * error code.
+	 * If the core creation failed, we return its error code.
+	 * Else: if a parameter  was created, we return 0
+	 *       else we return 1;
+	 */
+	return core_err < 0 ? core_err : param_err;
+}

linux-7.2.3/drivers/input/joystick/iforce/iforce-main.c

@@ -0,0 +1,400 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ *  Copyright (c) 2000-2002 Vojtech Pavlik <vojtech@ucw.cz>
+ *  Copyright (c) 2001-2002, 2007 Johann Deneux <johann.deneux@gmail.com>
+ *
+ *  USB/RS232 I-Force joysticks and wheels.
+ */
+
+#include <linux/export.h>
+#include <linux/unaligned.h>
+#include "iforce.h"
+
+MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>, Johann Deneux <johann.deneux@gmail.com>");
+MODULE_DESCRIPTION("Core I-Force joysticks and wheels driver");
+MODULE_LICENSE("GPL");
+
+static signed short btn_joystick[] =
+{ BTN_TRIGGER, BTN_TOP, BTN_THUMB, BTN_TOP2, BTN_BASE,
+  BTN_BASE2, BTN_BASE3, BTN_BASE4, BTN_BASE5, BTN_A,
+  BTN_B, BTN_C, BTN_DEAD, -1 };
+
+static signed short btn_joystick_avb[] =
+{ BTN_TRIGGER, BTN_THUMB, BTN_TOP, BTN_TOP2, BTN_BASE,
+  BTN_BASE2, BTN_BASE3, BTN_BASE4, BTN_DEAD, -1 };
+
+static signed short btn_wheel[] =
+{ BTN_GEAR_DOWN, BTN_GEAR_UP, BTN_BASE, BTN_BASE2, BTN_BASE3,
+  BTN_BASE4, BTN_BASE5, BTN_BASE6, -1 };
+
+static signed short abs_joystick[] =
+{ ABS_X, ABS_Y, ABS_THROTTLE, ABS_HAT0X, ABS_HAT0Y, -1 };
+
+static signed short abs_joystick_rudder[] =
+{ ABS_X, ABS_Y, ABS_THROTTLE, ABS_RUDDER, ABS_HAT0X, ABS_HAT0Y, -1 };
+
+static signed short abs_avb_pegasus[] =
+{ ABS_X, ABS_Y, ABS_THROTTLE, ABS_RUDDER, ABS_HAT0X, ABS_HAT0Y,
+  ABS_HAT1X, ABS_HAT1Y, -1 };
+
+static signed short abs_wheel[] =
+{ ABS_WHEEL, ABS_GAS, ABS_BRAKE, ABS_HAT0X, ABS_HAT0Y, -1 };
+
+static signed short ff_iforce[] =
+{ FF_PERIODIC, FF_CONSTANT, FF_SPRING, FF_DAMPER,
+  FF_SQUARE, FF_TRIANGLE, FF_SINE, FF_SAW_UP, FF_SAW_DOWN, FF_GAIN,
+  FF_AUTOCENTER, -1 };
+
+static struct iforce_device iforce_device[] = {
+	{ 0x044f, 0xa01c, "Thrustmaster Motor Sport GT",		btn_wheel, abs_wheel, ff_iforce },
+	{ 0x046d, 0xc281, "Logitech WingMan Force",			btn_joystick, abs_joystick, ff_iforce },
+	{ 0x046d, 0xc291, "Logitech WingMan Formula Force",		btn_wheel, abs_wheel, ff_iforce },
+	{ 0x05ef, 0x020a, "AVB Top Shot Pegasus",			btn_joystick_avb, abs_avb_pegasus, ff_iforce },
+	{ 0x05ef, 0x8884, "AVB Mag Turbo Force",			btn_wheel, abs_wheel, ff_iforce },
+	{ 0x05ef, 0x8886, "Boeder Force Feedback Wheel",		btn_wheel, abs_wheel, ff_iforce },
+	{ 0x05ef, 0x8888, "AVB Top Shot Force Feedback Racing Wheel",	btn_wheel, abs_wheel, ff_iforce }, //?
+	{ 0x061c, 0xc0a4, "ACT LABS Force RS",                          btn_wheel, abs_wheel, ff_iforce }, //?
+	{ 0x061c, 0xc084, "ACT LABS Force RS",				btn_wheel, abs_wheel, ff_iforce },
+	{ 0x06a3, 0xff04, "Saitek R440 Force Wheel",			btn_wheel, abs_wheel, ff_iforce }, //?
+	{ 0x06f8, 0x0001, "Guillemot Race Leader Force Feedback",	btn_wheel, abs_wheel, ff_iforce }, //?
+	{ 0x06f8, 0x0001, "Guillemot Jet Leader Force Feedback",	btn_joystick, abs_joystick_rudder, ff_iforce },
+	{ 0x06f8, 0x0004, "Guillemot Force Feedback Racing Wheel",	btn_wheel, abs_wheel, ff_iforce }, //?
+	{ 0x06f8, 0xa302, "Guillemot Jet Leader 3D",			btn_joystick, abs_joystick, ff_iforce }, //?
+	{ 0x06d6, 0x29bc, "Trust Force Feedback Race Master",		btn_wheel, abs_wheel, ff_iforce },
+	{ 0x0000, 0x0000, "Unknown I-Force Device [%04x:%04x]",		btn_joystick, abs_joystick, ff_iforce }
+};
+
+static int iforce_playback(struct input_dev *dev, int effect_id, int value)
+{
+	struct iforce *iforce = input_get_drvdata(dev);
+	struct iforce_core_effect *core_effect = &iforce->core_effects[effect_id];
+
+	if (value > 0)
+		set_bit(FF_CORE_SHOULD_PLAY, core_effect->flags);
+	else
+		clear_bit(FF_CORE_SHOULD_PLAY, core_effect->flags);
+
+	iforce_control_playback(iforce, effect_id, value);
+	return 0;
+}
+
+static void iforce_set_gain(struct input_dev *dev, u16 gain)
+{
+	struct iforce *iforce = input_get_drvdata(dev);
+	unsigned char data[3];
+
+	data[0] = gain >> 9;
+	iforce_send_packet(iforce, FF_CMD_GAIN, data);
+}
+
+static void iforce_set_autocenter(struct input_dev *dev, u16 magnitude)
+{
+	struct iforce *iforce = input_get_drvdata(dev);
+	unsigned char data[3];
+
+	data[0] = 0x03;
+	data[1] = magnitude >> 9;
+	iforce_send_packet(iforce, FF_CMD_AUTOCENTER, data);
+
+	data[0] = 0x04;
+	data[1] = 0x01;
+	iforce_send_packet(iforce, FF_CMD_AUTOCENTER, data);
+}
+
+/*
+ * Function called when an ioctl is performed on the event dev entry.
+ * It uploads an effect to the device
+ */
+static int iforce_upload_effect(struct input_dev *dev, struct ff_effect *effect, struct ff_effect *old)
+{
+	struct iforce *iforce = input_get_drvdata(dev);
+	struct iforce_core_effect *core_effect = &iforce->core_effects[effect->id];
+	int ret;
+
+	if (__test_and_set_bit(FF_CORE_IS_USED, core_effect->flags)) {
+		/* Check the effect is not already being updated */
+		if (test_bit(FF_CORE_UPDATE, core_effect->flags))
+			return -EAGAIN;
+	}
+
+/*
+ * Upload the effect
+ */
+	switch (effect->type) {
+	case FF_PERIODIC:
+		ret = iforce_upload_periodic(iforce, effect, old);
+		break;
+
+	case FF_CONSTANT:
+		ret = iforce_upload_constant(iforce, effect, old);
+		break;
+
+	case FF_SPRING:
+	case FF_DAMPER:
+		ret = iforce_upload_condition(iforce, effect, old);
+		break;
+
+	default:
+		return -EINVAL;
+	}
+
+	if (ret == 0) {
+		/* A packet was sent, forbid new updates until we are notified
+		 * that the packet was updated
+		 */
+		set_bit(FF_CORE_UPDATE, core_effect->flags);
+	}
+	return ret;
+}
+
+/*
+ * Erases an effect: it frees the effect id and mark as unused the memory
+ * allocated for the parameters
+ */
+static int iforce_erase_effect(struct input_dev *dev, int effect_id)
+{
+	struct iforce *iforce = input_get_drvdata(dev);
+	struct iforce_core_effect *core_effect = &iforce->core_effects[effect_id];
+	int err = 0;
+
+	if (test_bit(FF_MOD1_IS_USED, core_effect->flags))
+		err = release_resource(&core_effect->mod1_chunk);
+
+	if (!err && test_bit(FF_MOD2_IS_USED, core_effect->flags))
+		err = release_resource(&core_effect->mod2_chunk);
+
+	/* TODO: remember to change that if more FF_MOD* bits are added */
+	core_effect->flags[0] = 0;
+
+	return err;
+}
+
+static int iforce_open(struct input_dev *dev)
+{
+	struct iforce *iforce = input_get_drvdata(dev);
+
+	iforce->xport_ops->start_io(iforce);
+
+	if (test_bit(EV_FF, dev->evbit)) {
+		/* Enable force feedback */
+		iforce_send_packet(iforce, FF_CMD_ENABLE, "\004");
+	}
+
+	return 0;
+}
+
+static void iforce_close(struct input_dev *dev)
+{
+	struct iforce *iforce = input_get_drvdata(dev);
+	int i;
+
+	if (test_bit(EV_FF, dev->evbit)) {
+		/* Check: no effects should be present in memory */
+		for (i = 0; i < dev->ff->max_effects; i++) {
+			if (test_bit(FF_CORE_IS_USED, iforce->core_effects[i].flags)) {
+				dev_warn(&dev->dev,
+					"%s: Device still owns effects\n",
+					__func__);
+				break;
+			}
+		}
+
+		/* Disable force feedback playback */
+		iforce_send_packet(iforce, FF_CMD_ENABLE, "\001");
+		/* Wait for the command to complete */
+		wait_event_interruptible(iforce->wait,
+			!test_bit(IFORCE_XMIT_RUNNING, iforce->xmit_flags));
+	}
+
+	iforce->xport_ops->stop_io(iforce);
+}
+
+int iforce_init_device(struct device *parent, u16 bustype,
+		       struct iforce *iforce)
+{
+	struct input_dev *input_dev;
+	struct ff_device *ff;
+	u8 c[] = "CEOV";
+	u8 buf[IFORCE_MAX_LENGTH];
+	size_t len;
+	int i, error;
+	int ff_effects = 0;
+
+	input_dev = input_allocate_device();
+	if (!input_dev)
+		return -ENOMEM;
+
+	init_waitqueue_head(&iforce->wait);
+	spin_lock_init(&iforce->xmit_lock);
+	mutex_init(&iforce->mem_mutex);
+	iforce->xmit.buf = iforce->xmit_data;
+	iforce->dev = input_dev;
+
+/*
+ * Input device fields.
+ */
+
+	input_dev->id.bustype = bustype;
+	input_dev->dev.parent = parent;
+
+	input_set_drvdata(input_dev, iforce);
+
+	input_dev->name = "Unknown I-Force device";
+	input_dev->open = iforce_open;
+	input_dev->close = iforce_close;
+
+/*
+ * On-device memory allocation.
+ */
+
+	iforce->device_memory.name = "I-Force device effect memory";
+	iforce->device_memory.start = 0;
+	iforce->device_memory.end = 200;
+	iforce->device_memory.flags = IORESOURCE_MEM;
+	iforce->device_memory.parent = NULL;
+	iforce->device_memory.child = NULL;
+	iforce->device_memory.sibling = NULL;
+
+/*
+ * Wait until device ready - until it sends its first response.
+ */
+
+	for (i = 0; i < 20; i++)
+		if (!iforce_get_id_packet(iforce, 'O', buf, &len))
+			break;
+
+	if (i == 20) { /* 5 seconds */
+		dev_err(&input_dev->dev,
+			"Timeout waiting for response from device.\n");
+		error = -ENODEV;
+		goto fail;
+	}
+
+/*
+ * Get device info.
+ */
+
+	if (!iforce_get_id_packet(iforce, 'M', buf, &len) && len >= 3)
+		input_dev->id.vendor = get_unaligned_le16(buf + 1);
+	else
+		dev_warn(&iforce->dev->dev, "Device does not respond to id packet M\n");
+
+	if (!iforce_get_id_packet(iforce, 'P', buf, &len) && len >= 3)
+		input_dev->id.product = get_unaligned_le16(buf + 1);
+	else
+		dev_warn(&iforce->dev->dev, "Device does not respond to id packet P\n");
+
+	if (!iforce_get_id_packet(iforce, 'B', buf, &len) && len >= 3)
+		iforce->device_memory.end = get_unaligned_le16(buf + 1);
+	else
+		dev_warn(&iforce->dev->dev, "Device does not respond to id packet B\n");
+
+	if (!iforce_get_id_packet(iforce, 'N', buf, &len) && len >= 2)
+		ff_effects = buf[1];
+	else
+		dev_warn(&iforce->dev->dev, "Device does not respond to id packet N\n");
+
+	/* Check if the device can store more effects than the driver can really handle */
+	if (ff_effects > IFORCE_EFFECTS_MAX) {
+		dev_warn(&iforce->dev->dev, "Limiting number of effects to %d (device reports %d)\n",
+		       IFORCE_EFFECTS_MAX, ff_effects);
+		ff_effects = IFORCE_EFFECTS_MAX;
+	}
+
+/*
+ * Display additional info.
+ */
+
+	for (i = 0; c[i]; i++)
+		if (!iforce_get_id_packet(iforce, c[i], buf, &len))
+			iforce_dump_packet(iforce, "info",
+					   (FF_CMD_QUERY & 0xff00) | len, buf);
+
+/*
+ * Disable spring, enable force feedback.
+ */
+	iforce_set_autocenter(input_dev, 0);
+
+/*
+ * Find appropriate device entry
+ */
+
+	for (i = 0; iforce_device[i].idvendor; i++)
+		if (iforce_device[i].idvendor == input_dev->id.vendor &&
+		    iforce_device[i].idproduct == input_dev->id.product)
+			break;
+
+	iforce->type = iforce_device + i;
+	input_dev->name = iforce->type->name;
+
+/*
+ * Set input device bitfields and ranges.
+ */
+
+	input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS) |
+		BIT_MASK(EV_FF_STATUS);
+
+	for (i = 0; iforce->type->btn[i] >= 0; i++)
+		set_bit(iforce->type->btn[i], input_dev->keybit);
+
+	for (i = 0; iforce->type->abs[i] >= 0; i++) {
+
+		signed short t = iforce->type->abs[i];
+
+		switch (t) {
+		case ABS_X:
+		case ABS_Y:
+		case ABS_WHEEL:
+			input_set_abs_params(input_dev, t, -1920, 1920, 16, 128);
+			set_bit(t, input_dev->ffbit);
+			break;
+
+		case ABS_THROTTLE:
+		case ABS_GAS:
+		case ABS_BRAKE:
+			input_set_abs_params(input_dev, t, 0, 255, 0, 0);
+			break;
+
+		case ABS_RUDDER:
+			input_set_abs_params(input_dev, t, -128, 127, 0, 0);
+			break;
+
+		case ABS_HAT0X:
+		case ABS_HAT0Y:
+		case ABS_HAT1X:
+		case ABS_HAT1Y:
+			input_set_abs_params(input_dev, t, -1, 1, 0, 0);
+			break;
+		}
+	}
+
+	if (ff_effects) {
+
+		for (i = 0; iforce->type->ff[i] >= 0; i++)
+			set_bit(iforce->type->ff[i], input_dev->ffbit);
+
+		error = input_ff_create(input_dev, ff_effects);
+		if (error)
+			goto fail;
+
+		ff = input_dev->ff;
+		ff->upload = iforce_upload_effect;
+		ff->erase = iforce_erase_effect;
+		ff->set_gain = iforce_set_gain;
+		ff->set_autocenter = iforce_set_autocenter;
+		ff->playback = iforce_playback;
+	}
+/*
+ * Register input device.
+ */
+
+	error = input_register_device(iforce->dev);
+	if (error)
+		goto fail;
+
+	return 0;
+
+ fail:	input_free_device(input_dev);
+	return error;
+}
+EXPORT_SYMBOL(iforce_init_device);

linux-7.2.3/drivers/input/joystick/iforce/iforce-packets.c

@@ -0,0 +1,218 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ *  Copyright (c) 2000-2002 Vojtech Pavlik <vojtech@ucw.cz>
+ *  Copyright (c) 2001-2002, 2007 Johann Deneux <johann.deneux@gmail.com>
+ *
+ *  USB/RS232 I-Force joysticks and wheels.
+ */
+
+#include <linux/export.h>
+#include <linux/unaligned.h>
+#include "iforce.h"
+
+static struct {
+	__s32 x;
+	__s32 y;
+} iforce_hat_to_axis[16] = {{ 0,-1}, { 1,-1}, { 1, 0}, { 1, 1}, { 0, 1}, {-1, 1}, {-1, 0}, {-1,-1}};
+
+
+void iforce_dump_packet(struct iforce *iforce, char *msg, u16 cmd, unsigned char *data)
+{
+	dev_dbg(iforce->dev->dev.parent, "%s %s cmd = %04x, data = %*ph\n",
+		__func__, msg, cmd, LO(cmd), data);
+}
+
+/*
+ * Send a packet of bytes to the device
+ */
+int iforce_send_packet(struct iforce *iforce, u16 cmd, unsigned char* data)
+{
+	/* Copy data to buffer */
+	int n = LO(cmd);
+	int c;
+	int empty;
+	int head, tail;
+
+/*
+ * Update head and tail of xmit buffer
+ */
+	scoped_guard(spinlock_irqsave, &iforce->xmit_lock) {
+		head = iforce->xmit.head;
+		tail = iforce->xmit.tail;
+
+		if (CIRC_SPACE(head, tail, XMIT_SIZE) < n + 2) {
+			dev_warn(&iforce->dev->dev,
+				 "not enough space in xmit buffer to send new packet\n");
+			return -1;
+		}
+
+		empty = head == tail;
+		XMIT_INC(iforce->xmit.head, n + 2);
+
+/*
+ * Store packet in xmit buffer
+ */
+		iforce->xmit.buf[head] = HI(cmd);
+		XMIT_INC(head, 1);
+		iforce->xmit.buf[head] = LO(cmd);
+		XMIT_INC(head, 1);
+
+		c = CIRC_SPACE_TO_END(head, tail, XMIT_SIZE);
+		if (n < c)
+			c = n;
+
+		memcpy(&iforce->xmit.buf[head], data, c);
+		if (n != c)
+			memcpy(&iforce->xmit.buf[0], data + c, n - c);
+
+		XMIT_INC(head, n);
+	}
+
+/*
+ * If necessary, start the transmission
+ */
+	if (empty)
+		iforce->xport_ops->xmit(iforce);
+
+	return 0;
+}
+EXPORT_SYMBOL(iforce_send_packet);
+
+/* Start or stop an effect */
+int iforce_control_playback(struct iforce* iforce, u16 id, unsigned int value)
+{
+	unsigned char data[3];
+
+	data[0] = LO(id);
+	data[1] = (value > 0) ? ((value > 1) ? 0x41 : 0x01) : 0;
+	data[2] = LO(value);
+	return iforce_send_packet(iforce, FF_CMD_PLAY, data);
+}
+
+/* Mark an effect that was being updated as ready. That means it can be updated
+ * again */
+static int mark_core_as_ready(struct iforce *iforce, unsigned short addr)
+{
+	int i;
+
+	if (!iforce->dev->ff)
+		return 0;
+
+	for (i = 0; i < iforce->dev->ff->max_effects; ++i) {
+		if (test_bit(FF_CORE_IS_USED, iforce->core_effects[i].flags) &&
+		    (iforce->core_effects[i].mod1_chunk.start == addr ||
+		     iforce->core_effects[i].mod2_chunk.start == addr)) {
+			clear_bit(FF_CORE_UPDATE, iforce->core_effects[i].flags);
+			return 0;
+		}
+	}
+	dev_warn(&iforce->dev->dev, "unused effect %04x updated !!!\n", addr);
+	return -1;
+}
+
+static void iforce_report_hats_buttons(struct iforce *iforce, u8 *data)
+{
+	struct input_dev *dev = iforce->dev;
+	int i;
+
+	input_report_abs(dev, ABS_HAT0X, iforce_hat_to_axis[data[6] >> 4].x);
+	input_report_abs(dev, ABS_HAT0Y, iforce_hat_to_axis[data[6] >> 4].y);
+
+	for (i = 0; iforce->type->btn[i] >= 0; i++)
+		input_report_key(dev, iforce->type->btn[i],
+				 data[(i >> 3) + 5] & (1 << (i & 7)));
+
+	/* If there are untouched bits left, interpret them as the second hat */
+	if (i <= 8) {
+		u8 btns = data[6];
+
+		if (test_bit(ABS_HAT1X, dev->absbit)) {
+			if (btns & BIT(3))
+				input_report_abs(dev, ABS_HAT1X, -1);
+			else if (btns & BIT(1))
+				input_report_abs(dev, ABS_HAT1X, 1);
+			else
+				input_report_abs(dev, ABS_HAT1X, 0);
+		}
+
+		if (test_bit(ABS_HAT1Y, dev->absbit)) {
+			if (btns & BIT(0))
+				input_report_abs(dev, ABS_HAT1Y, -1);
+			else if (btns & BIT(2))
+				input_report_abs(dev, ABS_HAT1Y, 1);
+			else
+				input_report_abs(dev, ABS_HAT1Y, 0);
+		}
+	}
+}
+
+void iforce_process_packet(struct iforce *iforce,
+			   u8 packet_id, u8 *data, size_t len)
+{
+	struct input_dev *dev = iforce->dev;
+	int i, j;
+
+	switch (packet_id) {
+
+	case 0x01:	/* joystick position data */
+		if (len < 7)
+			break;
+
+		input_report_abs(dev, ABS_X,
+				 (__s16) get_unaligned_le16(data));
+		input_report_abs(dev, ABS_Y,
+				 (__s16) get_unaligned_le16(data + 2));
+		input_report_abs(dev, ABS_THROTTLE, 255 - data[4]);
+
+		if (len >= 8 && test_bit(ABS_RUDDER ,dev->absbit))
+			input_report_abs(dev, ABS_RUDDER, (__s8)data[7]);
+
+		iforce_report_hats_buttons(iforce, data);
+
+		input_sync(dev);
+		break;
+
+	case 0x03:	/* wheel position data */
+		if (len < 7)
+			break;
+
+		input_report_abs(dev, ABS_WHEEL,
+				 (__s16) get_unaligned_le16(data));
+		input_report_abs(dev, ABS_GAS,   255 - data[2]);
+		input_report_abs(dev, ABS_BRAKE, 255 - data[3]);
+
+		iforce_report_hats_buttons(iforce, data);
+
+		input_sync(dev);
+		break;
+
+	case 0x02:	/* status report */
+		if (len < 2)
+			break;
+
+		input_report_key(dev, BTN_DEAD, data[0] & 0x02);
+		input_sync(dev);
+
+		/* Check if an effect was just started or stopped */
+		i = data[1] & 0x7f;
+		if (i < IFORCE_EFFECTS_MAX) {
+			if (data[1] & 0x80) {
+				if (!test_and_set_bit(FF_CORE_IS_PLAYED,
+						      iforce->core_effects[i].flags)) {
+					/* Report play event */
+					input_report_ff_status(dev, i, FF_STATUS_PLAYING);
+				}
+			} else if (test_and_clear_bit(FF_CORE_IS_PLAYED,
+						      iforce->core_effects[i].flags)) {
+				/* Report stop event */
+				input_report_ff_status(dev, i, FF_STATUS_STOPPED);
+			}
+		}
+
+		for (j = 3; j + sizeof(u16) <= len; j += sizeof(u16))
+			mark_core_as_ready(iforce, get_unaligned_le16(data + j));
+
+		break;
+	}
+}
+EXPORT_SYMBOL(iforce_process_packet);

linux-7.2.3/drivers/input/joystick/iforce/iforce-serio.c

@@ -0,0 +1,251 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ *  Copyright (c) 2000-2001 Vojtech Pavlik <vojtech@ucw.cz>
+ *  Copyright (c) 2001, 2007 Johann Deneux <johann.deneux@gmail.com>
+ *
+ *  USB/RS232 I-Force joysticks and wheels.
+ */
+
+#include <linux/serio.h>
+#include "iforce.h"
+
+struct iforce_serio {
+	struct iforce iforce;
+
+	struct serio *serio;
+	int idx, pkt, len, id;
+	u8 csum;
+	u8 expect_packet;
+	u8 cmd_response[IFORCE_MAX_LENGTH];
+	u8 cmd_response_len;
+	u8 data_in[IFORCE_MAX_LENGTH];
+};
+
+static void iforce_serio_xmit(struct iforce *iforce)
+{
+	struct iforce_serio *iforce_serio = container_of(iforce,
+							 struct iforce_serio,
+							 iforce);
+	unsigned char cs;
+	int i;
+
+	if (test_and_set_bit(IFORCE_XMIT_RUNNING, iforce->xmit_flags)) {
+		set_bit(IFORCE_XMIT_AGAIN, iforce->xmit_flags);
+		return;
+	}
+
+	guard(spinlock_irqsave)(&iforce->xmit_lock);
+
+	do {
+		if (iforce->xmit.head == iforce->xmit.tail)
+			break;
+
+		cs = 0x2b;
+
+		serio_write(iforce_serio->serio, 0x2b);
+
+		serio_write(iforce_serio->serio,
+			    iforce->xmit.buf[iforce->xmit.tail]);
+		cs ^= iforce->xmit.buf[iforce->xmit.tail];
+		XMIT_INC(iforce->xmit.tail, 1);
+
+		for (i = iforce->xmit.buf[iforce->xmit.tail]; i >= 0; --i) {
+			serio_write(iforce_serio->serio,
+				    iforce->xmit.buf[iforce->xmit.tail]);
+			cs ^= iforce->xmit.buf[iforce->xmit.tail];
+			XMIT_INC(iforce->xmit.tail, 1);
+		}
+
+		serio_write(iforce_serio->serio, cs);
+
+	} while (test_and_clear_bit(IFORCE_XMIT_AGAIN, iforce->xmit_flags));
+
+	iforce_clear_xmit_and_wake(iforce);
+}
+
+static int iforce_serio_get_id(struct iforce *iforce, u8 id,
+			       u8 *response_data, size_t *response_len)
+{
+	struct iforce_serio *iforce_serio = container_of(iforce,
+							 struct iforce_serio,
+							 iforce);
+
+	iforce_serio->expect_packet = HI(FF_CMD_QUERY);
+	iforce_serio->cmd_response_len = 0;
+
+	iforce_send_packet(iforce, FF_CMD_QUERY, &id);
+
+	wait_event_interruptible_timeout(iforce->wait,
+					 !iforce_serio->expect_packet, HZ);
+
+	if (iforce_serio->expect_packet) {
+		iforce_serio->expect_packet = 0;
+		return -ETIMEDOUT;
+	}
+
+	if (iforce_serio->cmd_response[0] != id)
+		return -EIO;
+
+	memcpy(response_data, iforce_serio->cmd_response,
+	       iforce_serio->cmd_response_len);
+	*response_len = iforce_serio->cmd_response_len;
+
+	return 0;
+}
+
+static int iforce_serio_start_io(struct iforce *iforce)
+{
+	/* No special handling required */
+	return 0;
+}
+
+static void iforce_serio_stop_io(struct iforce *iforce)
+{
+	//TODO: Wait for the last packets to be sent
+}
+
+static const struct iforce_xport_ops iforce_serio_xport_ops = {
+	.xmit		= iforce_serio_xmit,
+	.get_id		= iforce_serio_get_id,
+	.start_io	= iforce_serio_start_io,
+	.stop_io	= iforce_serio_stop_io,
+};
+
+static void iforce_serio_write_wakeup(struct serio *serio)
+{
+	struct iforce *iforce = serio_get_drvdata(serio);
+
+	iforce_serio_xmit(iforce);
+}
+
+static irqreturn_t iforce_serio_irq(struct serio *serio,
+				    unsigned char data, unsigned int flags)
+{
+	struct iforce_serio *iforce_serio = serio_get_drvdata(serio);
+	struct iforce *iforce = &iforce_serio->iforce;
+
+	if (!iforce_serio->pkt) {
+		if (data == 0x2b)
+			iforce_serio->pkt = 1;
+		goto out;
+	}
+
+	if (!iforce_serio->id) {
+		if (data > 3 && data != 0xff)
+			iforce_serio->pkt = 0;
+		else
+			iforce_serio->id = data;
+		goto out;
+	}
+
+	if (!iforce_serio->len) {
+		if (data > IFORCE_MAX_LENGTH) {
+			iforce_serio->pkt = 0;
+			iforce_serio->id = 0;
+		} else {
+			iforce_serio->len = data;
+		}
+		goto out;
+	}
+
+	if (iforce_serio->idx < iforce_serio->len) {
+		iforce_serio->data_in[iforce_serio->idx++] = data;
+		iforce_serio->csum += data;
+		goto out;
+	}
+
+	if (iforce_serio->idx == iforce_serio->len) {
+		/* Handle command completion */
+		if (iforce_serio->expect_packet == iforce_serio->id) {
+			iforce_serio->expect_packet = 0;
+			memcpy(iforce_serio->cmd_response,
+			       iforce_serio->data_in, IFORCE_MAX_LENGTH);
+			iforce_serio->cmd_response_len = iforce_serio->len;
+
+			/* Signal that command is done */
+			wake_up_all(&iforce->wait);
+		} else if (likely(iforce->type)) {
+			iforce_process_packet(iforce, iforce_serio->id,
+					      iforce_serio->data_in,
+					      iforce_serio->len);
+		}
+
+		iforce_serio->pkt = 0;
+		iforce_serio->id  = 0;
+		iforce_serio->len = 0;
+		iforce_serio->idx = 0;
+		iforce_serio->csum = 0;
+	}
+out:
+	return IRQ_HANDLED;
+}
+
+static int iforce_serio_connect(struct serio *serio, struct serio_driver *drv)
+{
+	struct iforce_serio *iforce_serio;
+	int err;
+
+	iforce_serio = kzalloc_obj(*iforce_serio);
+	if (!iforce_serio)
+		return -ENOMEM;
+
+	iforce_serio->iforce.xport_ops = &iforce_serio_xport_ops;
+
+	iforce_serio->serio = serio;
+	serio_set_drvdata(serio, iforce_serio);
+
+	err = serio_open(serio, drv);
+	if (err)
+		goto fail1;
+
+	err = iforce_init_device(&serio->dev, BUS_RS232, &iforce_serio->iforce);
+	if (err)
+		goto fail2;
+
+	return 0;
+
+ fail2:	serio_close(serio);
+ fail1:	serio_set_drvdata(serio, NULL);
+	kfree(iforce_serio);
+	return err;
+}
+
+static void iforce_serio_disconnect(struct serio *serio)
+{
+	struct iforce_serio *iforce_serio = serio_get_drvdata(serio);
+
+	input_unregister_device(iforce_serio->iforce.dev);
+	serio_close(serio);
+	serio_set_drvdata(serio, NULL);
+	kfree(iforce_serio);
+}
+
+static const struct serio_device_id iforce_serio_ids[] = {
+	{
+		.type	= SERIO_RS232,
+		.proto	= SERIO_IFORCE,
+		.id	= SERIO_ANY,
+		.extra	= SERIO_ANY,
+	},
+	{ 0 }
+};
+
+MODULE_DEVICE_TABLE(serio, iforce_serio_ids);
+
+struct serio_driver iforce_serio_drv = {
+	.driver		= {
+		.name	= "iforce",
+	},
+	.description	= "RS232 I-Force joysticks and wheels driver",
+	.id_table	= iforce_serio_ids,
+	.write_wakeup	= iforce_serio_write_wakeup,
+	.interrupt	= iforce_serio_irq,
+	.connect	= iforce_serio_connect,
+	.disconnect	= iforce_serio_disconnect,
+};
+
+module_serio_driver(iforce_serio_drv);
+
+MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>, Johann Deneux <johann.deneux@gmail.com>");
+MODULE_DESCRIPTION("RS232 I-Force joysticks and wheels driver");
+MODULE_LICENSE("GPL");

linux-7.2.3/drivers/input/joystick/iforce/iforce-usb.c

@@ -0,0 +1,301 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+ /*
+ *  Copyright (c) 2000-2002 Vojtech Pavlik <vojtech@ucw.cz>
+ *  Copyright (c) 2001-2002, 2007 Johann Deneux <johann.deneux@gmail.com>
+ *
+ *  USB/RS232 I-Force joysticks and wheels.
+ */
+
+#include <linux/usb.h>
+#include "iforce.h"
+
+struct iforce_usb {
+	struct iforce iforce;
+
+	struct usb_device *usbdev;
+	struct usb_interface *intf;
+	struct urb *irq, *out;
+
+	u8 data_in[IFORCE_MAX_LENGTH] ____cacheline_aligned;
+	u8 data_out[IFORCE_MAX_LENGTH] ____cacheline_aligned;
+};
+
+static void __iforce_usb_xmit(struct iforce *iforce)
+{
+	struct iforce_usb *iforce_usb = container_of(iforce, struct iforce_usb,
+						     iforce);
+	int n, c;
+
+	guard(spinlock_irqsave)(&iforce->xmit_lock);
+
+	if (iforce->xmit.head == iforce->xmit.tail) {
+		iforce_clear_xmit_and_wake(iforce);
+		return;
+	}
+
+	((char *)iforce_usb->out->transfer_buffer)[0] = iforce->xmit.buf[iforce->xmit.tail];
+	XMIT_INC(iforce->xmit.tail, 1);
+	n = iforce->xmit.buf[iforce->xmit.tail];
+	XMIT_INC(iforce->xmit.tail, 1);
+
+	iforce_usb->out->transfer_buffer_length = n + 1;
+	iforce_usb->out->dev = iforce_usb->usbdev;
+
+	/* Copy rest of data then */
+	c = CIRC_CNT_TO_END(iforce->xmit.head, iforce->xmit.tail, XMIT_SIZE);
+	if (n < c)
+		c = n;
+
+	memcpy(iforce_usb->out->transfer_buffer + 1,
+	       &iforce->xmit.buf[iforce->xmit.tail],
+	       c);
+	if (n != c) {
+		memcpy(iforce_usb->out->transfer_buffer + 1 + c,
+		       &iforce->xmit.buf[0],
+		       n - c);
+	}
+	XMIT_INC(iforce->xmit.tail, n);
+
+	n=usb_submit_urb(iforce_usb->out, GFP_ATOMIC);
+	if (n) {
+		dev_warn(&iforce_usb->intf->dev,
+			 "usb_submit_urb failed %d\n", n);
+		iforce_clear_xmit_and_wake(iforce);
+	}
+
+	/* The IFORCE_XMIT_RUNNING bit is not cleared here. That's intended.
+	 * As long as the urb completion handler is not called, the transmiting
+	 * is considered to be running */
+}
+
+static void iforce_usb_xmit(struct iforce *iforce)
+{
+	if (!test_and_set_bit(IFORCE_XMIT_RUNNING, iforce->xmit_flags))
+		__iforce_usb_xmit(iforce);
+}
+
+static int iforce_usb_get_id(struct iforce *iforce, u8 id,
+			     u8 *response_data, size_t *response_len)
+{
+	struct iforce_usb *iforce_usb = container_of(iforce, struct iforce_usb,
+						     iforce);
+	u8 *buf;
+	int status;
+
+	buf = kmalloc(IFORCE_MAX_LENGTH, GFP_KERNEL);
+	if (!buf)
+		return -ENOMEM;
+
+	status = usb_control_msg(iforce_usb->usbdev,
+				 usb_rcvctrlpipe(iforce_usb->usbdev, 0),
+				 id,
+				 USB_TYPE_VENDOR | USB_DIR_IN |
+					USB_RECIP_INTERFACE,
+				 0, 0, buf, IFORCE_MAX_LENGTH, 1000);
+	if (status < 0) {
+		dev_err(&iforce_usb->intf->dev,
+			"usb_submit_urb failed: %d\n", status);
+	} else if (buf[0] != id) {
+		status = -EIO;
+	} else {
+		memcpy(response_data, buf, status);
+		*response_len = status;
+		status = 0;
+	}
+
+	kfree(buf);
+	return status;
+}
+
+static int iforce_usb_start_io(struct iforce *iforce)
+{
+	struct iforce_usb *iforce_usb = container_of(iforce, struct iforce_usb,
+						     iforce);
+
+	if (usb_submit_urb(iforce_usb->irq, GFP_KERNEL))
+		return -EIO;
+
+	return 0;
+}
+
+static void iforce_usb_stop_io(struct iforce *iforce)
+{
+	struct iforce_usb *iforce_usb = container_of(iforce, struct iforce_usb,
+						     iforce);
+
+	usb_kill_urb(iforce_usb->irq);
+	usb_kill_urb(iforce_usb->out);
+}
+
+static const struct iforce_xport_ops iforce_usb_xport_ops = {
+	.xmit		= iforce_usb_xmit,
+	.get_id		= iforce_usb_get_id,
+	.start_io	= iforce_usb_start_io,
+	.stop_io	= iforce_usb_stop_io,
+};
+
+static void iforce_usb_irq(struct urb *urb)
+{
+	struct iforce_usb *iforce_usb = urb->context;
+	struct iforce *iforce = &iforce_usb->iforce;
+	struct device *dev = &iforce_usb->intf->dev;
+	int status;
+
+	switch (urb->status) {
+	case 0:
+		/* success */
+		break;
+	case -ECONNRESET:
+	case -ENOENT:
+	case -ESHUTDOWN:
+		/* this urb is terminated, clean up */
+		dev_dbg(dev, "%s - urb shutting down with status: %d\n",
+			__func__, urb->status);
+		return;
+	default:
+		dev_dbg(dev, "%s - urb has status of: %d\n",
+			__func__, urb->status);
+		goto exit;
+	}
+
+	if (!urb->actual_length)
+		goto exit;
+
+	iforce_process_packet(iforce, iforce_usb->data_in[0],
+			      iforce_usb->data_in + 1, urb->actual_length - 1);
+
+exit:
+	status = usb_submit_urb(urb, GFP_ATOMIC);
+	if (status)
+		dev_err(dev, "%s - usb_submit_urb failed with result %d\n",
+			__func__, status);
+}
+
+static void iforce_usb_out(struct urb *urb)
+{
+	struct iforce_usb *iforce_usb = urb->context;
+	struct iforce *iforce = &iforce_usb->iforce;
+
+	if (urb->status) {
+		dev_dbg(&iforce_usb->intf->dev, "urb->status %d, exiting\n",
+			urb->status);
+		iforce_clear_xmit_and_wake(iforce);
+		return;
+	}
+
+	__iforce_usb_xmit(iforce);
+
+	wake_up_all(&iforce->wait);
+}
+
+static int iforce_usb_probe(struct usb_interface *intf,
+				const struct usb_device_id *id)
+{
+	struct usb_device *dev = interface_to_usbdev(intf);
+	struct usb_host_interface *interface;
+	struct usb_endpoint_descriptor *epirq, *epout;
+	struct iforce_usb *iforce_usb;
+	int err = -ENOMEM;
+
+	interface = intf->cur_altsetting;
+
+	if (interface->desc.bNumEndpoints < 2)
+		return -ENODEV;
+
+	epirq = &interface->endpoint[0].desc;
+	if (!usb_endpoint_is_int_in(epirq))
+		return -ENODEV;
+
+	epout = &interface->endpoint[1].desc;
+	if (!usb_endpoint_is_int_out(epout))
+		return -ENODEV;
+
+	iforce_usb = kzalloc_obj(*iforce_usb);
+	if (!iforce_usb)
+		goto fail;
+
+	iforce_usb->irq = usb_alloc_urb(0, GFP_KERNEL);
+	if (!iforce_usb->irq)
+		goto fail;
+
+	iforce_usb->out = usb_alloc_urb(0, GFP_KERNEL);
+	if (!iforce_usb->out)
+		goto fail;
+
+	iforce_usb->iforce.xport_ops = &iforce_usb_xport_ops;
+
+	iforce_usb->usbdev = dev;
+	iforce_usb->intf = intf;
+
+	usb_fill_int_urb(iforce_usb->irq, dev,
+			 usb_rcvintpipe(dev, epirq->bEndpointAddress),
+			 iforce_usb->data_in, sizeof(iforce_usb->data_in),
+			 iforce_usb_irq, iforce_usb, epirq->bInterval);
+
+	usb_fill_int_urb(iforce_usb->out, dev,
+			 usb_sndintpipe(dev, epout->bEndpointAddress),
+			 iforce_usb->data_out, sizeof(iforce_usb->data_out),
+			 iforce_usb_out, iforce_usb, epout->bInterval);
+
+	err = iforce_init_device(&intf->dev, BUS_USB, &iforce_usb->iforce);
+	if (err)
+		goto fail;
+
+	usb_set_intfdata(intf, iforce_usb);
+	return 0;
+
+fail:
+	if (iforce_usb) {
+		usb_free_urb(iforce_usb->irq);
+		usb_free_urb(iforce_usb->out);
+		kfree(iforce_usb);
+	}
+
+	return err;
+}
+
+static void iforce_usb_disconnect(struct usb_interface *intf)
+{
+	struct iforce_usb *iforce_usb = usb_get_intfdata(intf);
+
+	usb_set_intfdata(intf, NULL);
+
+	input_unregister_device(iforce_usb->iforce.dev);
+
+	usb_free_urb(iforce_usb->irq);
+	usb_free_urb(iforce_usb->out);
+
+	kfree(iforce_usb);
+}
+
+static const struct usb_device_id iforce_usb_ids[] = {
+	{ USB_DEVICE(0x044f, 0xa01c) },		/* Thrustmaster Motor Sport GT */
+	{ USB_DEVICE(0x046d, 0xc281) },		/* Logitech WingMan Force */
+	{ USB_DEVICE(0x046d, 0xc291) },		/* Logitech WingMan Formula Force */
+	{ USB_DEVICE(0x05ef, 0x020a) },		/* AVB Top Shot Pegasus */
+	{ USB_DEVICE(0x05ef, 0x8884) },		/* AVB Mag Turbo Force */
+	{ USB_DEVICE(0x05ef, 0x8888) },		/* AVB Top Shot FFB Racing Wheel */
+	{ USB_DEVICE(0x061c, 0xc0a4) },         /* ACT LABS Force RS */
+	{ USB_DEVICE(0x061c, 0xc084) },         /* ACT LABS Force RS */
+	{ USB_DEVICE(0x06a3, 0xff04) },		/* Saitek R440 Force Wheel */
+	{ USB_DEVICE(0x06f8, 0x0001) },		/* Guillemot Race Leader Force Feedback */
+	{ USB_DEVICE(0x06f8, 0x0003) },		/* Guillemot Jet Leader Force Feedback */
+	{ USB_DEVICE(0x06f8, 0x0004) },		/* Guillemot Force Feedback Racing Wheel */
+	{ USB_DEVICE(0x06f8, 0xa302) },		/* Guillemot Jet Leader 3D */
+	{ }					/* Terminating entry */
+};
+
+MODULE_DEVICE_TABLE (usb, iforce_usb_ids);
+
+struct usb_driver iforce_usb_driver = {
+	.name =		"iforce",
+	.probe =	iforce_usb_probe,
+	.disconnect =	iforce_usb_disconnect,
+	.id_table =	iforce_usb_ids,
+};
+
+module_usb_driver(iforce_usb_driver);
+
+MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>, Johann Deneux <johann.deneux@gmail.com>");
+MODULE_DESCRIPTION("USB I-Force joysticks and wheels driver");
+MODULE_LICENSE("GPL");

linux-7.2.3/drivers/input/joystick/iforce/iforce.h

@@ -0,0 +1,147 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ *  Copyright (c) 2000-2002 Vojtech Pavlik <vojtech@ucw.cz>
+ *  Copyright (c) 2001-2002, 2007 Johann Deneux <johann.deneux@gmail.com>
+ *
+ *  USB/RS232 I-Force joysticks and wheels.
+ */
+
+#include <linux/kernel.h>
+#include <linux/slab.h>
+#include <linux/input.h>
+#include <linux/module.h>
+#include <linux/spinlock.h>
+#include <linux/circ_buf.h>
+#include <linux/mutex.h>
+
+/* This module provides arbitrary resource management routines.
+ * I use it to manage the device's memory.
+ * Despite the name of this module, I am *not* going to access the ioports.
+ */
+#include <linux/ioport.h>
+
+
+#define IFORCE_MAX_LENGTH	16
+
+#define IFORCE_EFFECTS_MAX	32
+
+/* Each force feedback effect is made of one core effect, which can be
+ * associated to at most to effect modifiers
+ */
+#define FF_MOD1_IS_USED		0
+#define FF_MOD2_IS_USED		1
+#define FF_CORE_IS_USED		2
+#define FF_CORE_IS_PLAYED	3	/* Effect is currently being played */
+#define FF_CORE_SHOULD_PLAY	4	/* User wants the effect to be played */
+#define FF_CORE_UPDATE		5	/* Effect is being updated */
+#define FF_MODCORE_CNT		6
+
+struct iforce_core_effect {
+	/* Information about where modifiers are stored in the device's memory */
+	struct resource mod1_chunk;
+	struct resource mod2_chunk;
+	unsigned long flags[BITS_TO_LONGS(FF_MODCORE_CNT)];
+};
+
+#define FF_CMD_EFFECT		0x010e
+#define FF_CMD_ENVELOPE		0x0208
+#define FF_CMD_MAGNITUDE	0x0303
+#define FF_CMD_PERIOD		0x0407
+#define FF_CMD_CONDITION	0x050a
+
+#define FF_CMD_AUTOCENTER	0x4002
+#define FF_CMD_PLAY		0x4103
+#define FF_CMD_ENABLE		0x4201
+#define FF_CMD_GAIN		0x4301
+
+#define FF_CMD_QUERY		0xff01
+
+/* Buffer for async write */
+#define XMIT_SIZE		256
+#define XMIT_INC(var, n)	(var)+=n; (var)&= XMIT_SIZE -1
+/* iforce::xmit_flags */
+#define IFORCE_XMIT_RUNNING	0
+#define IFORCE_XMIT_AGAIN	1
+
+struct iforce_device {
+	u16 idvendor;
+	u16 idproduct;
+	char *name;
+	signed short *btn;
+	signed short *abs;
+	signed short *ff;
+};
+
+struct iforce;
+
+struct iforce_xport_ops {
+	void (*xmit)(struct iforce *iforce);
+	int (*get_id)(struct iforce *iforce, u8 id,
+		      u8 *response_data, size_t *response_len);
+	int (*start_io)(struct iforce *iforce);
+	void (*stop_io)(struct iforce *iforce);
+};
+
+struct iforce {
+	struct input_dev *dev;		/* Input device interface */
+	struct iforce_device *type;
+	const struct iforce_xport_ops *xport_ops;
+
+	spinlock_t xmit_lock;
+	/* Buffer used for asynchronous sending of bytes to the device */
+	struct circ_buf xmit;
+	unsigned char xmit_data[XMIT_SIZE];
+	unsigned long xmit_flags[1];
+
+					/* Force Feedback */
+	wait_queue_head_t wait;
+	struct resource device_memory;
+	struct iforce_core_effect core_effects[IFORCE_EFFECTS_MAX];
+	struct mutex mem_mutex;
+};
+
+/* Get hi and low bytes of a 16-bits int */
+#define HI(a)	((unsigned char)((a) >> 8))
+#define LO(a)	((unsigned char)((a) & 0xff))
+
+/* For many parameters, it seems that 0x80 is a special value that should
+ * be avoided. Instead, we replace this value by 0x7f
+ */
+#define HIFIX80(a) ((unsigned char)(((a)<0? (a)+255 : (a))>>8))
+
+/* Encode a time value */
+#define TIME_SCALE(a)	(a)
+
+static inline int iforce_get_id_packet(struct iforce *iforce, u8 id,
+				       u8 *response_data, size_t *response_len)
+{
+	return iforce->xport_ops->get_id(iforce, id,
+					 response_data, response_len);
+}
+
+static inline void iforce_clear_xmit_and_wake(struct iforce *iforce)
+{
+	clear_bit(IFORCE_XMIT_RUNNING, iforce->xmit_flags);
+	wake_up_all(&iforce->wait);
+}
+
+/* Public functions */
+/* iforce-main.c */
+int iforce_init_device(struct device *parent, u16 bustype,
+		       struct iforce *iforce);
+
+/* iforce-packets.c */
+int iforce_control_playback(struct iforce*, u16 id, unsigned int);
+void iforce_process_packet(struct iforce *iforce,
+			   u8 packet_id, u8 *data, size_t len);
+int iforce_send_packet(struct iforce *iforce, u16 cmd, unsigned char* data);
+void iforce_dump_packet(struct iforce *iforce, char *msg, u16 cmd, unsigned char *data);
+
+/* iforce-ff.c */
+int iforce_upload_periodic(struct iforce *, struct ff_effect *, struct ff_effect *);
+int iforce_upload_constant(struct iforce *, struct ff_effect *, struct ff_effect *);
+int iforce_upload_condition(struct iforce *, struct ff_effect *, struct ff_effect *);
+
+/* Public variables */
+extern struct serio_driver iforce_serio_drv;
+extern struct usb_driver iforce_usb_driver;