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 * Should you need to contact me, the author, you can do so either by 24 * e-mail - mail your message to <vojtech@ucw.cz>, or by paper mail: 25 * Vojtech Pavlik, Simunkova 1594, Prague 8, 182 00 Czech Republic 26 */ 27 28 #include <linux/kernel.h> 29 #include <linux/slab.h> 30 #include <linux/input.h> 31 #include <linux/module.h> 32 #include <linux/init.h> 33 #include <linux/spinlock.h> 34 #include <linux/usb.h> 35 #include <linux/serio.h> 36 #include <linux/circ_buf.h> 37 #include <linux/mutex.h> 38 39 /* This module provides arbitrary resource management routines. 40 * I use it to manage the device's memory. 41 * Despite the name of this module, I am *not* going to access the ioports. 42 */ 43 #include <linux/ioport.h> 44 45 46 #define IFORCE_MAX_LENGTH 16 47 48 /* iforce::bus */ 49 #define IFORCE_232 1 50 #define IFORCE_USB 2 51 52 #define IFORCE_EFFECTS_MAX 32 53 54 /* Each force feedback effect is made of one core effect, which can be 55 * associated to at most to effect modifiers 56 */ 57 #define FF_MOD1_IS_USED 0 58 #define FF_MOD2_IS_USED 1 59 #define FF_CORE_IS_USED 2 60 #define FF_CORE_IS_PLAYED 3 /* Effect is currently being played */ 61 #define FF_CORE_SHOULD_PLAY 4 /* User wants the effect to be played */ 62 #define FF_CORE_UPDATE 5 /* Effect is being updated */ 63 #define FF_MODCORE_CNT 6 64 65 struct iforce_core_effect { 66 /* Information about where modifiers are stored in the device's memory */ 67 struct resource mod1_chunk; 68 struct resource mod2_chunk; 69 unsigned long flags[BITS_TO_LONGS(FF_MODCORE_CNT)]; 70 }; 71 72 #define FF_CMD_EFFECT 0x010e 73 #define FF_CMD_ENVELOPE 0x0208 74 #define FF_CMD_MAGNITUDE 0x0303 75 #define FF_CMD_PERIOD 0x0407 76 #define FF_CMD_CONDITION 0x050a 77 78 #define FF_CMD_AUTOCENTER 0x4002 79 #define FF_CMD_PLAY 0x4103 80 #define FF_CMD_ENABLE 0x4201 81 #define FF_CMD_GAIN 0x4301 82 83 #define FF_CMD_QUERY 0xff01 84 85 /* Buffer for async write */ 86 #define XMIT_SIZE 256 87 #define XMIT_INC(var, n) (var)+=n; (var)&= XMIT_SIZE -1 88 /* iforce::xmit_flags */ 89 #define IFORCE_XMIT_RUNNING 0 90 #define IFORCE_XMIT_AGAIN 1 91 92 struct iforce_device { 93 u16 idvendor; 94 u16 idproduct; 95 char *name; 96 signed short *btn; 97 signed short *abs; 98 signed short *ff; 99 }; 100 101 struct iforce { 102 struct input_dev *dev; /* Input device interface */ 103 struct iforce_device *type; 104 int bus; 105 106 unsigned char data[IFORCE_MAX_LENGTH]; 107 unsigned char edata[IFORCE_MAX_LENGTH]; 108 u16 ecmd; 109 u16 expect_packet; 110 111 #ifdef CONFIG_JOYSTICK_IFORCE_232 112 struct serio *serio; /* RS232 transfer */ 113 int idx, pkt, len, id; 114 unsigned char csum; 115 #endif 116 #ifdef CONFIG_JOYSTICK_IFORCE_USB 117 struct usb_device *usbdev; /* USB transfer */ 118 struct urb *irq, *out, *ctrl; 119 struct usb_ctrlrequest cr; 120 #endif 121 spinlock_t xmit_lock; 122 /* Buffer used for asynchronous sending of bytes to the device */ 123 struct circ_buf xmit; 124 unsigned char xmit_data[XMIT_SIZE]; 125 unsigned long xmit_flags[1]; 126 127 /* Force Feedback */ 128 wait_queue_head_t wait; 129 struct resource device_memory; 130 struct iforce_core_effect core_effects[IFORCE_EFFECTS_MAX]; 131 struct mutex mem_mutex; 132 }; 133 134 /* Get hi and low bytes of a 16-bits int */ 135 #define HI(a) ((unsigned char)((a) >> 8)) 136 #define LO(a) ((unsigned char)((a) & 0xff)) 137 138 /* For many parameters, it seems that 0x80 is a special value that should 139 * be avoided. Instead, we replace this value by 0x7f 140 */ 141 #define HIFIX80(a) ((unsigned char)(((a)<0? (a)+255 : (a))>>8)) 142 143 /* Encode a time value */ 144 #define TIME_SCALE(a) (a) 145 146 147 /* Public functions */ 148 /* iforce-serio.c */ 149 void iforce_serial_xmit(struct iforce *iforce); 150 151 /* iforce-usb.c */ 152 void iforce_usb_xmit(struct iforce *iforce); 153 154 /* iforce-main.c */ 155 int iforce_init_device(struct iforce *iforce); 156 157 /* iforce-packets.c */ 158 int iforce_control_playback(struct iforce*, u16 id, unsigned int); 159 void iforce_process_packet(struct iforce *iforce, u16 cmd, unsigned char *data); 160 int iforce_send_packet(struct iforce *iforce, u16 cmd, unsigned char* data); 161 void iforce_dump_packet(char *msg, u16 cmd, unsigned char *data) ; 162 int iforce_get_id_packet(struct iforce *iforce, char *packet); 163 164 /* iforce-ff.c */ 165 int iforce_upload_periodic(struct iforce *, struct ff_effect *, struct ff_effect *); 166 int iforce_upload_constant(struct iforce *, struct ff_effect *, struct ff_effect *); 167 int iforce_upload_condition(struct iforce *, struct ff_effect *, struct ff_effect *); 168 169 /* Public variables */ 170 extern struct serio_driver iforce_serio_drv; 171 extern struct usb_driver iforce_usb_driver; 172