drivers/input/joystick/iforce/iforce.h

   1 /* SPDX-License-Identifier: GPL-2.0-or-later */
   2 /*
   3  *  Copyright (c) 2000-2002 Vojtech Pavlik <vojtech@ucw.cz>
   4  *  Copyright (c) 2001-2002, 2007 Johann Deneux <johann.deneux@gmail.com>
   5  *
   6  *  USB/RS232 I-Force joysticks and wheels.
   7  */
   8
   9 /*
  10  */
  11
  12 #include <linux/kernel.h>
  13 #include <linux/slab.h>
  14 #include <linux/input.h>
  15 #include <linux/module.h>
  16 #include <linux/spinlock.h>
  17 #include <linux/usb.h>
  18 #include <linux/serio.h>
  19 #include <linux/circ_buf.h>
  20 #include <linux/mutex.h>
  21
  22 /* This module provides arbitrary resource management routines.
  23  * I use it to manage the device's memory.
  24  * Despite the name of this module, I am *not* going to access the ioports.
  25  */
  26 #include <linux/ioport.h>
  27
  28
  29 #define IFORCE_MAX_LENGTH       16
  30
  31 /* iforce::bus */
  32 #define IFORCE_232      1
  33 #define IFORCE_USB      2
  34
  35 #define IFORCE_EFFECTS_MAX      32
  36
  37 /* Each force feedback effect is made of one core effect, which can be
  38  * associated to at most to effect modifiers
  39  */
  40 #define FF_MOD1_IS_USED         0
  41 #define FF_MOD2_IS_USED         1
  42 #define FF_CORE_IS_USED         2
  43 #define FF_CORE_IS_PLAYED       3       /* Effect is currently being played */
  44 #define FF_CORE_SHOULD_PLAY     4       /* User wants the effect to be played */
  45 #define FF_CORE_UPDATE          5       /* Effect is being updated */
  46 #define FF_MODCORE_CNT          6
  47
  48 struct iforce_core_effect {
  49         /* Information about where modifiers are stored in the device's memory */
  50         struct resource mod1_chunk;
  51         struct resource mod2_chunk;
  52         unsigned long flags[BITS_TO_LONGS(FF_MODCORE_CNT)];
  53 };
  54
  55 #define FF_CMD_EFFECT           0x010e
  56 #define FF_CMD_ENVELOPE         0x0208
  57 #define FF_CMD_MAGNITUDE        0x0303
  58 #define FF_CMD_PERIOD           0x0407
  59 #define FF_CMD_CONDITION        0x050a
  60
  61 #define FF_CMD_AUTOCENTER       0x4002
  62 #define FF_CMD_PLAY             0x4103
  63 #define FF_CMD_ENABLE           0x4201
  64 #define FF_CMD_GAIN             0x4301
  65
  66 #define FF_CMD_QUERY            0xff01
  67
  68 /* Buffer for async write */
  69 #define XMIT_SIZE               256
  70 #define XMIT_INC(var, n)        (var)+=n; (var)&= XMIT_SIZE -1
  71 /* iforce::xmit_flags */
  72 #define IFORCE_XMIT_RUNNING     0
  73 #define IFORCE_XMIT_AGAIN       1
  74
  75 struct iforce_device {
  76         u16 idvendor;
  77         u16 idproduct;
  78         char *name;
  79         signed short *btn;
  80         signed short *abs;
  81         signed short *ff;
  82 };
  83
  84 struct iforce {
  85         struct input_dev *dev;          /* Input device interface */
  86         struct iforce_device *type;
  87         int bus;
  88
  89         unsigned char data[IFORCE_MAX_LENGTH];
  90         unsigned char edata[IFORCE_MAX_LENGTH];
  91         u16 ecmd;
  92         u16 expect_packet;
  93
  94 #ifdef CONFIG_JOYSTICK_IFORCE_232
  95         struct serio *serio;            /* RS232 transfer */
  96         int idx, pkt, len, id;
  97         unsigned char csum;
  98 #endif
  99 #ifdef CONFIG_JOYSTICK_IFORCE_USB
 100         struct usb_device *usbdev;      /* USB transfer */
 101         struct usb_interface *intf;
 102         struct urb *irq, *out, *ctrl;
 103         struct usb_ctrlrequest cr;
 104 #endif
 105         spinlock_t xmit_lock;
 106         /* Buffer used for asynchronous sending of bytes to the device */
 107         struct circ_buf xmit;
 108         unsigned char xmit_data[XMIT_SIZE];
 109         unsigned long xmit_flags[1];
 110
 111                                         /* Force Feedback */
 112         wait_queue_head_t wait;
 113         struct resource device_memory;
 114         struct iforce_core_effect core_effects[IFORCE_EFFECTS_MAX];
 115         struct mutex mem_mutex;
 116 };
 117
 118 /* Get hi and low bytes of a 16-bits int */
 119 #define HI(a)   ((unsigned char)((a) >> 8))
 120 #define LO(a)   ((unsigned char)((a) & 0xff))
 121
 122 /* For many parameters, it seems that 0x80 is a special value that should
 123  * be avoided. Instead, we replace this value by 0x7f
 124  */
 125 #define HIFIX80(a) ((unsigned char)(((a)<0? (a)+255 : (a))>>8))
 126
 127 /* Encode a time value */
 128 #define TIME_SCALE(a)   (a)
 129
 130
 131 /* Public functions */
 132 /* iforce-serio.c */
 133 void iforce_serial_xmit(struct iforce *iforce);
 134
 135 /* iforce-usb.c */
 136 void iforce_usb_xmit(struct iforce *iforce);
 137
 138 /* iforce-main.c */
 139 int iforce_init_device(struct iforce *iforce);
 140
 141 /* iforce-packets.c */
 142 int iforce_control_playback(struct iforce*, u16 id, unsigned int);
 143 void iforce_process_packet(struct iforce *iforce, u16 cmd, unsigned char *data);
 144 int iforce_send_packet(struct iforce *iforce, u16 cmd, unsigned char* data);
 145 void iforce_dump_packet(struct iforce *iforce, char *msg, u16 cmd, unsigned char *data);
 146 int iforce_get_id_packet(struct iforce *iforce, char *packet);
 147
 148 /* iforce-ff.c */
 149 int iforce_upload_periodic(struct iforce *, struct ff_effect *, struct ff_effect *);
 150 int iforce_upload_constant(struct iforce *, struct ff_effect *, struct ff_effect *);
 151 int iforce_upload_condition(struct iforce *, struct ff_effect *, struct ff_effect *);
 152
 153 /* Public variables */
 154 extern struct serio_driver iforce_serio_drv;
 155 extern struct usb_driver iforce_usb_driver;