[mirror_ubuntu-jammy-kernel.git] / drivers / input / joystick / iforce / iforce-packets.c

// 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"

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;
	unsigned long flags;

/*
 * Update head and tail of xmit buffer
 */
	spin_lock_irqsave(&iforce->xmit_lock, flags);

	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");
		spin_unlock_irqrestore(&iforce->xmit_lock, flags);
		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);

	spin_unlock_irqrestore(&iforce->xmit_lock, flags);
/*
 * If necessary, start the transmission
 */
	switch (iforce->bus) {

#ifdef CONFIG_JOYSTICK_IFORCE_232
		case IFORCE_232:
		if (empty)
			iforce_serial_xmit(iforce);
		break;
#endif
#ifdef CONFIG_JOYSTICK_IFORCE_USB
		case IFORCE_USB:

		if (iforce->usbdev && empty &&
			!test_and_set_bit(IFORCE_XMIT_RUNNING, iforce->xmit_flags)) {

			iforce_usb_xmit(iforce);
		}
		break;
#endif
	}
	return 0;
}

/* 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;
}

void iforce_process_packet(struct iforce *iforce, u16 cmd, unsigned char *data)
{
	struct input_dev *dev = iforce->dev;
	int i;
	static int being_used = 0;

	if (being_used)
		dev_warn(&iforce->dev->dev,
			 "re-entrant call to iforce_process %d\n", being_used);
	being_used++;

#ifdef CONFIG_JOYSTICK_IFORCE_232
	if (HI(iforce->expect_packet) == HI(cmd)) {
		iforce->expect_packet = 0;
		iforce->ecmd = cmd;
		memcpy(iforce->edata, data, IFORCE_MAX_LENGTH);
	}
#endif
	wake_up(&iforce->wait);

	if (!iforce->type) {
		being_used--;
		return;
	}

	switch (HI(cmd)) {

		case 0x01:	/* joystick position data */
		case 0x03:	/* wheel position data */
			if (HI(cmd) == 1) {
				input_report_abs(dev, ABS_X, (__s16) (((__s16)data[1] << 8) | data[0]));
				input_report_abs(dev, ABS_Y, (__s16) (((__s16)data[3] << 8) | data[2]));
				input_report_abs(dev, ABS_THROTTLE, 255 - data[4]);
				if (LO(cmd) >= 8 && test_bit(ABS_RUDDER ,dev->absbit))
					input_report_abs(dev, ABS_RUDDER, (__s8)data[7]);
			} else {
				input_report_abs(dev, ABS_WHEEL, (__s16) (((__s16)data[1] << 8) | data[0]));
				input_report_abs(dev, ABS_GAS,   255 - data[2]);
				input_report_abs(dev, ABS_BRAKE, 255 - data[3]);
			}

			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) {
				int btns = data[6];
				if (test_bit(ABS_HAT1X, dev->absbit)) {
					if (btns & 8) input_report_abs(dev, ABS_HAT1X, -1);
					else if (btns & 2) input_report_abs(dev, ABS_HAT1X, 1);
					else input_report_abs(dev, ABS_HAT1X, 0);
				}
				if (test_bit(ABS_HAT1Y, dev->absbit)) {
					if (btns & 1) input_report_abs(dev, ABS_HAT1Y, -1);
					else if (btns & 4) input_report_abs(dev, ABS_HAT1Y, 1);
					else input_report_abs(dev, ABS_HAT1Y, 0);
				}
			}

			input_sync(dev);

			break;

		case 0x02:	/* status report */
			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 (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);
			}
			if (LO(cmd) > 3) {
				int j;
				for (j = 3; j < LO(cmd); j += 2)
					mark_core_as_ready(iforce, data[j] | (data[j+1]<<8));
			}
			break;
	}
	being_used--;
}

int iforce_get_id_packet(struct iforce *iforce, char *packet)
{
	switch (iforce->bus) {

	case IFORCE_USB: {
#ifdef CONFIG_JOYSTICK_IFORCE_USB
		int status;

		iforce->cr.bRequest = packet[0];
		iforce->ctrl->dev = iforce->usbdev;

		status = usb_submit_urb(iforce->ctrl, GFP_KERNEL);
		if (status) {
			dev_err(&iforce->intf->dev,
				"usb_submit_urb failed %d\n", status);
			return -1;
		}

		wait_event_interruptible_timeout(iforce->wait,
			iforce->ctrl->status != -EINPROGRESS, HZ);

		if (iforce->ctrl->status) {
			dev_dbg(&iforce->intf->dev,
				"iforce->ctrl->status = %d\n",
				iforce->ctrl->status);
			usb_unlink_urb(iforce->ctrl);
			return -1;
		}
#else
		printk(KERN_DEBUG "iforce_get_id_packet: iforce->bus = USB!\n");
#endif
		}
		break;

	case IFORCE_232:

#ifdef CONFIG_JOYSTICK_IFORCE_232
		iforce->expect_packet = FF_CMD_QUERY;
		iforce_send_packet(iforce, FF_CMD_QUERY, packet);

		wait_event_interruptible_timeout(iforce->wait,
			!iforce->expect_packet, HZ);

		if (iforce->expect_packet) {
			iforce->expect_packet = 0;
			return -1;
		}
#else
		dev_err(&iforce->dev->dev,
			"iforce_get_id_packet: iforce->bus = SERIO!\n");
#endif
		break;

	default:
		dev_err(&iforce->dev->dev,
			"iforce_get_id_packet: iforce->bus = %d\n",
			iforce->bus);
		break;
	}

	return -(iforce->edata[0] != packet[0]);
}
Commit	Line	Data
1a59d1b8	1	// SPDX-License-Identifier: GPL-2.0-or-later
1da177e4	2	/*
1da177e4	3	* Copyright (c) 2000-2002 Vojtech Pavlik <vojtech@ucw.cz>
598972d4	4	* Copyright (c) 2001-2002, 2007 Johann Deneux <johann.deneux@gmail.com>
1da177e4 LT	5	*
	6	* USB/RS232 I-Force joysticks and wheels.
	7	*/
	8
	9	/*
1da177e4 LT	10	*/
	11
	12	#include "iforce.h"
	13
	14	static struct {
	15	__s32 x;
	16	__s32 y;
	17	} iforce_hat_to_axis[16] = {{ 0,-1}, { 1,-1}, { 1, 0}, { 1, 1}, { 0, 1}, {-1, 1}, {-1, 0}, {-1,-1}};
	18
	19
305180bc	20	void iforce_dump_packet(struct iforce iforce, char msg, u16 cmd, unsigned char *data)
1da177e4	21	{
305180bc TS	22	dev_dbg(iforce->dev->dev.parent, "%s %s cmd = %04x, data = %*ph\n",
305180bc TS	23	__func__, msg, cmd, LO(cmd), data);
1da177e4 LT	24	}
	25
	26	/*
	27	* Send a packet of bytes to the device
	28	*/
	29	int iforce_send_packet(struct iforce iforce, u16 cmd, unsigned char data)
	30	{
	31	/* Copy data to buffer */
	32	int n = LO(cmd);
	33	int c;
	34	int empty;
	35	int head, tail;
	36	unsigned long flags;
	37
	38	/*
	39	* Update head and tail of xmit buffer
	40	*/
	41	spin_lock_irqsave(&iforce->xmit_lock, flags);
	42
	43	head = iforce->xmit.head;
	44	tail = iforce->xmit.tail;
	45
598972d4	46
1da177e4	47	if (CIRC_SPACE(head, tail, XMIT_SIZE) < n+2) {
1817b169 GKH	48	dev_warn(&iforce->dev->dev,
1817b169 GKH	49	"not enough space in xmit buffer to send new packet\n");
1da177e4 LT	50	spin_unlock_irqrestore(&iforce->xmit_lock, flags);
	51	return -1;
	52	}
	53
	54	empty = head == tail;
	55	XMIT_INC(iforce->xmit.head, n+2);
	56
	57	/*
	58	* Store packet in xmit buffer
	59	*/
	60	iforce->xmit.buf[head] = HI(cmd);
	61	XMIT_INC(head, 1);
	62	iforce->xmit.buf[head] = LO(cmd);
	63	XMIT_INC(head, 1);
	64
	65	c = CIRC_SPACE_TO_END(head, tail, XMIT_SIZE);
	66	if (n < c) c=n;
	67
	68	memcpy(&iforce->xmit.buf[head],
	69	data,
	70	c);
	71	if (n != c) {
	72	memcpy(&iforce->xmit.buf[0],
	73	data + c,
	74	n - c);
	75	}
	76	XMIT_INC(head, n);
	77
	78	spin_unlock_irqrestore(&iforce->xmit_lock, flags);
	79	/*
	80	* If necessary, start the transmission
	81	*/
	82	switch (iforce->bus) {
	83
	84	#ifdef CONFIG_JOYSTICK_IFORCE_232
	85	case IFORCE_232:
	86	if (empty)
	87	iforce_serial_xmit(iforce);
	88	break;
	89	#endif
	90	#ifdef CONFIG_JOYSTICK_IFORCE_USB
	91	case IFORCE_USB:
	92
	93	if (iforce->usbdev && empty &&
	94	!test_and_set_bit(IFORCE_XMIT_RUNNING, iforce->xmit_flags)) {
	95
	96	iforce_usb_xmit(iforce);
	97	}
	98	break;
	99	#endif
	100	}
	101	return 0;
	102	}
	103
	104	/* Start or stop an effect */
	105	int iforce_control_playback(struct iforce* iforce, u16 id, unsigned int value)
	106	{
	107	unsigned char data[3];
	108
1da177e4 LT	109	data[0] = LO(id);
	110	data[1] = (value > 0) ? ((value > 1) ? 0x41 : 0x01) : 0;
	111	data[2] = LO(value);
	112	return iforce_send_packet(iforce, FF_CMD_PLAY, data);
	113	}
	114
	115	/* Mark an effect that was being updated as ready. That means it can be updated
	116	* again */
	117	static int mark_core_as_ready(struct iforce *iforce, unsigned short addr)
	118	{
	119	int i;
17dd3f0f	120
f6a01c85 AH	121	if (!iforce->dev->ff)
	122	return 0;
	123
	124	for (i = 0; i < iforce->dev->ff->max_effects; ++i) {
1da177e4 LT	125	if (test_bit(FF_CORE_IS_USED, iforce->core_effects[i].flags) &&
	126	(iforce->core_effects[i].mod1_chunk.start == addr \|\|
	127	iforce->core_effects[i].mod2_chunk.start == addr)) {
	128	clear_bit(FF_CORE_UPDATE, iforce->core_effects[i].flags);
	129	return 0;
	130	}
	131	}
1817b169	132	dev_warn(&iforce->dev->dev, "unused effect %04x updated !!!\n", addr);
1da177e4 LT	133	return -1;
	134	}
	135
7d12e780	136	void iforce_process_packet(struct iforce iforce, u16 cmd, unsigned char data)
1da177e4	137	{
17dd3f0f	138	struct input_dev *dev = iforce->dev;
1da177e4 LT	139	int i;
	140	static int being_used = 0;
	141
	142	if (being_used)
1817b169 GKH	143	dev_warn(&iforce->dev->dev,
1817b169 GKH	144	"re-entrant call to iforce_process %d\n", being_used);
1da177e4 LT	145	being_used++;
	146
	147	#ifdef CONFIG_JOYSTICK_IFORCE_232
	148	if (HI(iforce->expect_packet) == HI(cmd)) {
	149	iforce->expect_packet = 0;
	150	iforce->ecmd = cmd;
	151	memcpy(iforce->edata, data, IFORCE_MAX_LENGTH);
1da177e4 LT	152	}
1da177e4 LT	153	#endif
97d4ebfe	154	wake_up(&iforce->wait);
1da177e4 LT	155
	156	if (!iforce->type) {
	157	being_used--;
	158	return;
	159	}
	160
	161	switch (HI(cmd)) {
	162
	163	case 0x01: /* joystick position data */
	164	case 0x03: /* wheel position data */
1da177e4 LT	165	if (HI(cmd) == 1) {
	166	input_report_abs(dev, ABS_X, (__s16) (((__s16)data[1] << 8) \| data[0]));
	167	input_report_abs(dev, ABS_Y, (__s16) (((__s16)data[3] << 8) \| data[2]));
	168	input_report_abs(dev, ABS_THROTTLE, 255 - data[4]);
	169	if (LO(cmd) >= 8 && test_bit(ABS_RUDDER ,dev->absbit))
	170	input_report_abs(dev, ABS_RUDDER, (__s8)data[7]);
	171	} else {
	172	input_report_abs(dev, ABS_WHEEL, (__s16) (((__s16)data[1] << 8) \| data[0]));
	173	input_report_abs(dev, ABS_GAS, 255 - data[2]);
	174	input_report_abs(dev, ABS_BRAKE, 255 - data[3]);
	175	}
	176
	177	input_report_abs(dev, ABS_HAT0X, iforce_hat_to_axis[data[6] >> 4].x);
	178	input_report_abs(dev, ABS_HAT0Y, iforce_hat_to_axis[data[6] >> 4].y);
	179
	180	for (i = 0; iforce->type->btn[i] >= 0; i++)
	181	input_report_key(dev, iforce->type->btn[i], data[(i >> 3) + 5] & (1 << (i & 7)));
	182
	183	/* If there are untouched bits left, interpret them as the second hat */
	184	if (i <= 8) {
	185	int btns = data[6];
	186	if (test_bit(ABS_HAT1X, dev->absbit)) {
	187	if (btns & 8) input_report_abs(dev, ABS_HAT1X, -1);
	188	else if (btns & 2) input_report_abs(dev, ABS_HAT1X, 1);
	189	else input_report_abs(dev, ABS_HAT1X, 0);
	190	}
	191	if (test_bit(ABS_HAT1Y, dev->absbit)) {
	192	if (btns & 1) input_report_abs(dev, ABS_HAT1Y, -1);
	193	else if (btns & 4) input_report_abs(dev, ABS_HAT1Y, 1);
	194	else input_report_abs(dev, ABS_HAT1Y, 0);
	195	}
	196	}
	197
	198	input_sync(dev);
	199
	200	break;
	201
	202	case 0x02: /* status report */
1da177e4 LT	203	input_report_key(dev, BTN_DEAD, data[0] & 0x02);
	204	input_sync(dev);
	205
	206	/* Check if an effect was just started or stopped */
	207	i = data[1] & 0x7f;
	208	if (data[1] & 0x80) {
	209	if (!test_and_set_bit(FF_CORE_IS_PLAYED, iforce->core_effects[i].flags)) {
f6a01c85 AH	210	/* Report play event */
f6a01c85 AH	211	input_report_ff_status(dev, i, FF_STATUS_PLAYING);
1da177e4	212	}
f6a01c85	213	} else if (test_and_clear_bit(FF_CORE_IS_PLAYED, iforce->core_effects[i].flags)) {
1da177e4 LT	214	/* Report stop event */
	215	input_report_ff_status(dev, i, FF_STATUS_STOPPED);
	216	}
	217	if (LO(cmd) > 3) {
	218	int j;
f6a01c85	219	for (j = 3; j < LO(cmd); j += 2)
1da177e4	220	mark_core_as_ready(iforce, data[j] \| (data[j+1]<<8));
1da177e4 LT	221	}
	222	break;
	223	}
	224	being_used--;
	225	}
	226
	227	int iforce_get_id_packet(struct iforce iforce, char packet)
	228	{
1da177e4 LT	229	switch (iforce->bus) {
1da177e4 LT	230
d9f03831	231	case IFORCE_USB: {
1da177e4	232	#ifdef CONFIG_JOYSTICK_IFORCE_USB
d9f03831 AM	233	int status;
d9f03831 AM	234
1da177e4 LT	235	iforce->cr.bRequest = packet[0];
	236	iforce->ctrl->dev = iforce->usbdev;
	237
381a2c6f	238	status = usb_submit_urb(iforce->ctrl, GFP_KERNEL);
c0338c15	239	if (status) {
a852d78e	240	dev_err(&iforce->intf->dev,
7b22a885	241	"usb_submit_urb failed %d\n", status);
1da177e4	242	return -1;
c0338c15	243	}
1da177e4	244
fb76b099 VP	245	wait_event_interruptible_timeout(iforce->wait,
fb76b099 VP	246	iforce->ctrl->status != -EINPROGRESS, HZ);
1da177e4	247
97d4ebfe	248	if (iforce->ctrl->status) {
a852d78e	249	dev_dbg(&iforce->intf->dev,
f576125d GKH	250	"iforce->ctrl->status = %d\n",
f576125d GKH	251	iforce->ctrl->status);
1da177e4 LT	252	usb_unlink_urb(iforce->ctrl);
	253	return -1;
	254	}
	255	#else
f576125d	256	printk(KERN_DEBUG "iforce_get_id_packet: iforce->bus = USB!\n");
1da177e4	257	#endif
d9f03831	258	}
1da177e4 LT	259	break;
	260
	261	case IFORCE_232:
	262
	263	#ifdef CONFIG_JOYSTICK_IFORCE_232
	264	iforce->expect_packet = FF_CMD_QUERY;
	265	iforce_send_packet(iforce, FF_CMD_QUERY, packet);
	266
fb76b099 VP	267	wait_event_interruptible_timeout(iforce->wait,
fb76b099 VP	268	!iforce->expect_packet, HZ);
1da177e4	269
fb76b099	270	if (iforce->expect_packet) {
1da177e4 LT	271	iforce->expect_packet = 0;
	272	return -1;
	273	}
	274	#else
7b22a885 GKH	275	dev_err(&iforce->dev->dev,
7b22a885 GKH	276	"iforce_get_id_packet: iforce->bus = SERIO!\n");
1da177e4 LT	277	#endif
	278	break;
	279
	280	default:
7b22a885 GKH	281	dev_err(&iforce->dev->dev,
	282	"iforce_get_id_packet: iforce->bus = %d\n",
	283	iforce->bus);
1da177e4 LT	284	break;
	285	}
	286
	287	return -(iforce->edata[0] != packet[0]);
	288	}
	289