1 /* 2 * Copyright (c) 2000-2002 Vojtech Pavlik <vojtech@ucw.cz> 3 * Copyright (c) 2001-2002, 2007 Johann Deneux <johann.deneux@gmail.com> 4 * 5 * USB/RS232 I-Force joysticks and wheels. 6 */ 7 8 /* 9 * This program is free software; you can redistribute it and/or modify 10 * it under the terms of the GNU General Public License as published by 11 * the Free Software Foundation; either version 2 of the License, or 12 * (at your option) any later version. 13 * 14 * This program is distributed in the hope that it will be useful, 15 * but WITHOUT ANY WARRANTY; without even the implied warranty of 16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 17 * GNU General Public License for more details. 18 * 19 * You should have received a copy of the GNU General Public License 20 * along with this program; if not, write to the Free Software 21 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 22 */ 23 24 #include <linux/kernel.h> 25 #include <linux/slab.h> 26 #include <linux/input.h> 27 #include <linux/module.h> 28 #include <linux/spinlock.h> 29 #include <linux/usb.h> 30 #include <linux/serio.h> 31 #include <linux/circ_buf.h> 32 #include <linux/mutex.h> 33 34 /* This module provides arbitrary resource management routines. 35 * I use it to manage the device's memory. 36 * Despite the name of this module, I am *not* going to access the ioports. 37 */ 38 #include <linux/ioport.h> 39 40 41 #define IFORCE_MAX_LENGTH 16 42 43 /* iforce::bus */ 44 #define IFORCE_232 1 45 #define IFORCE_USB 2 46 47 #define IFORCE_EFFECTS_MAX 32 48 49 /* Each force feedback effect is made of one core effect, which can be 50 * associated to at most to effect modifiers 51 */ 52 #define FF_MOD1_IS_USED 0 53 #define FF_MOD2_IS_USED 1 54 #define FF_CORE_IS_USED 2 55 #define FF_CORE_IS_PLAYED 3 /* Effect is currently being played */ 56 #define FF_CORE_SHOULD_PLAY 4 /* User wants the effect to be played */ 57 #define FF_CORE_UPDATE 5 /* Effect is being updated */ 58 #define FF_MODCORE_CNT 6 59 60 struct iforce_core_effect { 61 /* Information about where modifiers are stored in the device's memory */ 62 struct resource mod1_chunk; 63 struct resource mod2_chunk; 64 unsigned long flags[BITS_TO_LONGS(FF_MODCORE_CNT)]; 65 }; 66 67 #define FF_CMD_EFFECT 0x010e 68 #define FF_CMD_ENVELOPE 0x0208 69 #define FF_CMD_MAGNITUDE 0x0303 70 #define FF_CMD_PERIOD 0x0407 71 #define FF_CMD_CONDITION 0x050a 72 73 #define FF_CMD_AUTOCENTER 0x4002 74 #define FF_CMD_PLAY 0x4103 75 #define FF_CMD_ENABLE 0x4201 76 #define FF_CMD_GAIN 0x4301 77 78 #define FF_CMD_QUERY 0xff01 79 80 /* Buffer for async write */ 81 #define XMIT_SIZE 256 82 #define XMIT_INC(var, n) (var)+=n; (var)&= XMIT_SIZE -1 83 /* iforce::xmit_flags */ 84 #define IFORCE_XMIT_RUNNING 0 85 #define IFORCE_XMIT_AGAIN 1 86 87 struct iforce_device { 88 u16 idvendor; 89 u16 idproduct; 90 char *name; 91 signed short *btn; 92 signed short *abs; 93 signed short *ff; 94 }; 95 96 struct iforce { 97 struct input_dev *dev; /* Input device interface */ 98 struct iforce_device *type; 99 int bus; 100 101 unsigned char data[IFORCE_MAX_LENGTH]; 102 unsigned char edata[IFORCE_MAX_LENGTH]; 103 u16 ecmd; 104 u16 expect_packet; 105 106 #ifdef CONFIG_JOYSTICK_IFORCE_232 107 struct serio *serio; /* RS232 transfer */ 108 int idx, pkt, len, id; 109 unsigned char csum; 110 #endif 111 #ifdef CONFIG_JOYSTICK_IFORCE_USB 112 struct usb_device *usbdev; /* USB transfer */ 113 struct usb_interface *intf; 114 struct urb *irq, *out, *ctrl; 115 struct usb_ctrlrequest cr; 116 #endif 117 spinlock_t xmit_lock; 118 /* Buffer used for asynchronous sending of bytes to the device */ 119 struct circ_buf xmit; 120 unsigned char xmit_data[XMIT_SIZE]; 121 unsigned long xmit_flags[1]; 122 123 /* Force Feedback */ 124 wait_queue_head_t wait; 125 struct resource device_memory; 126 struct iforce_core_effect core_effects[IFORCE_EFFECTS_MAX]; 127 struct mutex mem_mutex; 128 }; 129 130 /* Get hi and low bytes of a 16-bits int */ 131 #define HI(a) ((unsigned char)((a) >> 8)) 132 #define LO(a) ((unsigned char)((a) & 0xff)) 133 134 /* For many parameters, it seems that 0x80 is a special value that should 135 * be avoided. Instead, we replace this value by 0x7f 136 */ 137 #define HIFIX80(a) ((unsigned char)(((a)<0? (a)+255 : (a))>>8)) 138 139 /* Encode a time value */ 140 #define TIME_SCALE(a) (a) 141 142 143 /* Public functions */ 144 /* iforce-serio.c */ 145 void iforce_serial_xmit(struct iforce *iforce); 146 147 /* iforce-usb.c */ 148 void iforce_usb_xmit(struct iforce *iforce); 149 150 /* iforce-main.c */ 151 int iforce_init_device(struct iforce *iforce); 152 153 /* iforce-packets.c */ 154 int iforce_control_playback(struct iforce*, u16 id, unsigned int); 155 void iforce_process_packet(struct iforce *iforce, u16 cmd, unsigned char *data); 156 int iforce_send_packet(struct iforce *iforce, u16 cmd, unsigned char* data); 157 void iforce_dump_packet(struct iforce *iforce, char *msg, u16 cmd, unsigned char *data); 158 int iforce_get_id_packet(struct iforce *iforce, char *packet); 159 160 /* iforce-ff.c */ 161 int iforce_upload_periodic(struct iforce *, struct ff_effect *, struct ff_effect *); 162 int iforce_upload_constant(struct iforce *, struct ff_effect *, struct ff_effect *); 163 int iforce_upload_condition(struct iforce *, struct ff_effect *, struct ff_effect *); 164 165 /* Public variables */ 166 extern struct serio_driver iforce_serio_drv; 167 extern struct usb_driver iforce_usb_driver; 168