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 * $Id: iforce.h,v 1.13 2002/07/07 10:22:50 jdeneux Exp $
 *  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.

 * 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
 * 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/slab.h>
#include <linux/input.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/spinlock.h>
#include <linux/usb.h>
#include <linux/serio.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

/* iforce::bus */
#define IFORCE_232      1
#define IFORCE_USB      2

#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_AGAIN     1

struct iforce_device {
      u16 idvendor;
      u16 idproduct;
      char *name;
      signed short *btn;
      signed short *abs;
      signed short *ff;

struct iforce {
      struct input_dev *dev;        /* Input device interface */
      struct iforce_device *type;
      int bus;

      unsigned char data[IFORCE_MAX_LENGTH];
      unsigned char edata[IFORCE_MAX_LENGTH];
      u16 ecmd;
      u16 expect_packet;

      struct serio *serio;          /* RS232 transfer */
      int idx, pkt, len, id;
      unsigned char csum;
      struct usb_device *usbdev;    /* USB transfer */
      struct urb *irq, *out, *ctrl;
      struct usb_ctrlrequest cr;
      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)

/* Public functions */
/* iforce-serio.c */
void iforce_serial_xmit(struct iforce *iforce);

/* iforce-usb.c */
void iforce_usb_xmit(struct iforce *iforce);
void iforce_usb_delete(struct iforce *iforce);

/* iforce-main.c */
int iforce_init_device(struct iforce *iforce);
void iforce_delete_device(struct iforce *iforce);

/* iforce-packets.c */
int iforce_control_playback(struct iforce*, u16 id, unsigned int);
void iforce_process_packet(struct iforce *iforce, u16 cmd, unsigned char *data);
int iforce_send_packet(struct iforce *iforce, u16 cmd, unsigned char* data);
void iforce_dump_packet(char *msg, u16 cmd, unsigned char *data) ;
int iforce_get_id_packet(struct iforce *iforce, char *packet);

/* 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;

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