drivers/input/joystick/iforce/iforce-packets.c - maze/linux - Git at Google

 /*
  * $Id: iforce-packets.c,v 1.16 2002/07/07 10:22:50 jdeneux Exp $
  *
  *  Copyright (c) 2000-2002 Vojtech Pavlik <vojtech@ucw.cz>
  *  Copyright (c) 2001-2002 Johann Deneux <deneux@ifrance.com>
  *
  *  USB/RS232 I-Force joysticks and wheels.
  */

 /*
  * 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 "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(char *msg, u16 cmd, unsigned char *data)
 {
 	int i;

 	printk(KERN_DEBUG "iforce.c: %s ( cmd = %04x, data = ", msg, cmd);
 	for (i = 0; i < LO(cmd); i++)
 		printk("%02x ", data[i]);
 	printk(")\n");
 }

 /*
  * 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) {
 		printk(KERN_WARNING "iforce.c: 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];

 printk(KERN_DEBUG "iforce-packets.c: control_playback %d %d\n", id, value);

 	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;

 	for (i = 0; i < iforce->dev->ff_effects_max; ++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;
 		}
 	}
 	printk(KERN_WARNING "iforce-packets.c: unused effect %04x updated !!!\n", addr);
 	return -1;
 }

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

 	if (being_used)
 		printk(KERN_WARNING "iforce-packets.c: 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 */

 			input_regs(dev, regs);

 			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_regs(dev, regs);
 			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
 		iforce->cr.bRequest = packet[0];
 		iforce->ctrl->dev = iforce->usbdev;

 		if (usb_submit_urb(iforce->ctrl, GFP_ATOMIC))
 			return -1;

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

 		if (iforce->ctrl->status) {
 			usb_unlink_urb(iforce->ctrl);
 			return -1;
 		}
 #else
 		printk(KERN_ERR "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
 		printk(KERN_ERR "iforce_get_id_packet: iforce->bus = SERIO!\n");
 #endif
 		break;

 	default:
 		printk(KERN_ERR "iforce_get_id_packet: iforce->bus = %d\n",
 		       iforce->bus);
 		break;
 	}

 	return -(iforce->edata[0] != packet[0]);
 }
	/*
	* $Id: iforce-packets.c,v 1.16 2002/07/07 10:22:50 jdeneux Exp $
	*
	* Copyright (c) 2000-2002 Vojtech Pavlik <vojtech@ucw.cz>
	* Copyright (c) 2001-2002 Johann Deneux <deneux@ifrance.com>
	*
	* USB/RS232 I-Force joysticks and wheels.
	*/

	/*
	* 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 "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(char msg, u16 cmd, unsigned char data)
	{
	int i;

	printk(KERN_DEBUG "iforce.c: %s ( cmd = %04x, data = ", msg, cmd);
	for (i = 0; i < LO(cmd); i++)
	printk("%02x ", data[i]);
	printk(")\n");
	}

	/*
	* 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) {
	printk(KERN_WARNING "iforce.c: 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];

	printk(KERN_DEBUG "iforce-packets.c: control_playback %d %d\n", id, value);

	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;

	for (i = 0; i < iforce->dev->ff_effects_max; ++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;
	}
	}
	printk(KERN_WARNING "iforce-packets.c: unused effect %04x updated !!!\n", addr);
	return -1;
	}

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

	if (being_used)
	printk(KERN_WARNING "iforce-packets.c: 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 */

	input_regs(dev, regs);

	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_regs(dev, regs);
	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
	iforce->cr.bRequest = packet[0];
	iforce->ctrl->dev = iforce->usbdev;

	if (usb_submit_urb(iforce->ctrl, GFP_ATOMIC))
	return -1;

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

	if (iforce->ctrl->status) {
	usb_unlink_urb(iforce->ctrl);
	return -1;
	}
	#else
	printk(KERN_ERR "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
	printk(KERN_ERR "iforce_get_id_packet: iforce->bus = SERIO!\n");
	#endif
	break;

	default:
	printk(KERN_ERR "iforce_get_id_packet: iforce->bus = %d\n",
	iforce->bus);
	break;
	}

	return -(iforce->edata[0] != packet[0]);
	}