drivers/input/joystick/iforce/iforce.h

   1 /*
   2  * $Id: iforce.h,v 1.13 2002/07/07 10:22:50 jdeneux Exp $
   3  *
   4  *  Copyright (c) 2000-2002 Vojtech Pavlik <vojtech@ucw.cz>
   5  *  Copyright (c) 2001-2002 Johann Deneux <deneux@ifrance.com>
   6  *
   7  *  USB/RS232 I-Force joysticks and wheels.
   8  */
   9
  10 /*
  11  * This program is free software; you can redistribute it and/or modify
  12  * it under the terms of the GNU General Public License as published by
  13  * the Free Software Foundation; either version 2 of the License, or
  14  * (at your option) any later version.
  15  *
  16  * This program is distributed in the hope that it will be useful,
  17  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  18  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  19  * GNU General Public License for more details.
  20  *
  21  * You should have received a copy of the GNU General Public License
  22  * along with this program; if not, write to the Free Software
  23  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  24  *
  25  * Should you need to contact me, the author, you can do so either by
  26  * e-mail - mail your message to <vojtech@ucw.cz>, or by paper mail:
  27  * Vojtech Pavlik, Simunkova 1594, Prague 8, 182 00 Czech Republic
  28  */
  29
  30 #include <linux/kernel.h>
  31 #include <linux/slab.h>
  32 #include <linux/input.h>
  33 #include <linux/module.h>
  34 #include <linux/init.h>
  35 #include <linux/spinlock.h>
  36 #include <linux/usb.h>
  37 #include <linux/serio.h>
  38 #include <linux/config.h>
  39 #include <linux/circ_buf.h>
  40 #include <asm/semaphore.h>
  41
  42 /* This module provides arbitrary resource management routines.
  43  * I use it to manage the device's memory.
  44  * Despite the name of this module, I am *not* going to access the ioports.
  45  */
  46 #include <linux/ioport.h>
  47
  48 #define IFORCE_MAX_LENGTH       16
  49
  50 /* iforce::bus */
  51 #define IFORCE_232      1
  52 #define IFORCE_USB      2
  53
  54 #define FALSE 0
  55 #define TRUE 1
  56
  57 #define FF_EFFECTS_MAX  32
  58
  59 /* Each force feedback effect is made of one core effect, which can be
  60  * associated to at most to effect modifiers
  61  */
  62 #define FF_MOD1_IS_USED         0
  63 #define FF_MOD2_IS_USED         1
  64 #define FF_CORE_IS_USED         2
  65 #define FF_CORE_IS_PLAYED       3       /* Effect is currently being played */
  66 #define FF_CORE_SHOULD_PLAY     4       /* User wants the effect to be played */
  67 #define FF_CORE_UPDATE          5       /* Effect is being updated */
  68 #define FF_MODCORE_MAX          5
  69
  70 #define CHECK_OWNERSHIP(i, iforce)      \
  71         ((i) < FF_EFFECTS_MAX && i >= 0 && \
  72         test_bit(FF_CORE_IS_USED, (iforce)->core_effects[(i)].flags) && \
  73         (current->pid == 0 || \
  74         (iforce)->core_effects[(i)].owner == current->pid))
  75
  76 struct iforce_core_effect {
  77         /* Information about where modifiers are stored in the device's memory */
  78         struct resource mod1_chunk;
  79         struct resource mod2_chunk;
  80         unsigned long flags[NBITS(FF_MODCORE_MAX)];
  81         pid_t owner;
  82         /* Used to keep track of parameters of an effect. They are needed
  83          * to know what parts of an effect changed in an update operation.
  84          * We try to send only parameter packets if possible, as sending
  85          * effect parameter requires the effect to be stoped and restarted
  86          */
  87         struct ff_effect effect;
  88 };
  89
  90 #define FF_CMD_EFFECT           0x010e
  91 #define FF_CMD_ENVELOPE         0x0208
  92 #define FF_CMD_MAGNITUDE        0x0303
  93 #define FF_CMD_PERIOD           0x0407
  94 #define FF_CMD_CONDITION        0x050a
  95
  96 #define FF_CMD_AUTOCENTER       0x4002
  97 #define FF_CMD_PLAY             0x4103
  98 #define FF_CMD_ENABLE           0x4201
  99 #define FF_CMD_GAIN             0x4301
 100
 101 #define FF_CMD_QUERY            0xff01
 102
 103 /* Buffer for async write */
 104 #define XMIT_SIZE               256
 105 #define XMIT_INC(var, n)        (var)+=n; (var)&= XMIT_SIZE -1
 106 /* iforce::xmit_flags */
 107 #define IFORCE_XMIT_RUNNING     0
 108 #define IFORCE_XMIT_AGAIN       1
 109
 110 struct iforce_device {
 111         u16 idvendor;
 112         u16 idproduct;
 113         char *name;
 114         signed short *btn;
 115         signed short *abs;
 116         signed short *ff;
 117 };
 118
 119 struct iforce {
 120         struct input_dev *dev;          /* Input device interface */
 121         struct iforce_device *type;
 122         int bus;
 123
 124         unsigned char data[IFORCE_MAX_LENGTH];
 125         unsigned char edata[IFORCE_MAX_LENGTH];
 126         u16 ecmd;
 127         u16 expect_packet;
 128
 129 #ifdef CONFIG_JOYSTICK_IFORCE_232
 130         struct serio *serio;            /* RS232 transfer */
 131         int idx, pkt, len, id;
 132         unsigned char csum;
 133 #endif
 134 #ifdef CONFIG_JOYSTICK_IFORCE_USB
 135         struct usb_device *usbdev;      /* USB transfer */
 136         struct urb *irq, *out, *ctrl;
 137         struct usb_ctrlrequest cr;
 138 #endif
 139         spinlock_t xmit_lock;
 140         /* Buffer used for asynchronous sending of bytes to the device */
 141         struct circ_buf xmit;
 142         unsigned char xmit_data[XMIT_SIZE];
 143         long xmit_flags[1];
 144
 145                                         /* Force Feedback */
 146         wait_queue_head_t wait;
 147         struct resource device_memory;
 148         struct iforce_core_effect core_effects[FF_EFFECTS_MAX];
 149         struct semaphore mem_mutex;
 150 };
 151
 152 /* Get hi and low bytes of a 16-bits int */
 153 #define HI(a)   ((unsigned char)((a) >> 8))
 154 #define LO(a)   ((unsigned char)((a) & 0xff))
 155
 156 /* For many parameters, it seems that 0x80 is a special value that should
 157  * be avoided. Instead, we replace this value by 0x7f
 158  */
 159 #define HIFIX80(a) ((unsigned char)(((a)<0? (a)+255 : (a))>>8))
 160
 161 /* Encode a time value */
 162 #define TIME_SCALE(a)   (a)
 163
 164
 165 /* Public functions */
 166 /* iforce-serio.c */
 167 void iforce_serial_xmit(struct iforce *iforce);
 168
 169 /* iforce-usb.c */
 170 void iforce_usb_xmit(struct iforce *iforce);
 171 void iforce_usb_delete(struct iforce *iforce);
 172
 173 /* iforce-main.c */
 174 int iforce_init_device(struct iforce *iforce);
 175 void iforce_delete_device(struct iforce *iforce);
 176
 177 /* iforce-packets.c */
 178 int iforce_control_playback(struct iforce*, u16 id, unsigned int);
 179 void iforce_process_packet(struct iforce *iforce, u16 cmd, unsigned char *data, struct pt_regs *regs);
 180 int iforce_send_packet(struct iforce *iforce, u16 cmd, unsigned char* data);
 181 void iforce_dump_packet(char *msg, u16 cmd, unsigned char *data) ;
 182 int iforce_get_id_packet(struct iforce *iforce, char *packet);
 183
 184 /* iforce-ff.c */
 185 int iforce_upload_periodic(struct iforce*, struct ff_effect*, int is_update);
 186 int iforce_upload_constant(struct iforce*, struct ff_effect*, int is_update);
 187 int iforce_upload_condition(struct iforce*, struct ff_effect*, int is_update);
 188
 189 /* Public variables */
 190 extern struct serio_driver iforce_serio_drv;
 191 extern struct usb_driver iforce_usb_driver;