Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * $Id: cobra.c,v 1.19 2002/01/22 20:26:52 vojtech Exp $ |
| 3 | * |
| 4 | * Copyright (c) 1999-2001 Vojtech Pavlik |
| 5 | */ |
| 6 | |
| 7 | /* |
| 8 | * Creative Labs Blaster GamePad Cobra driver for Linux |
| 9 | */ |
| 10 | |
| 11 | /* |
| 12 | * This program is free software; you can redistribute it and/or modify |
| 13 | * it under the terms of the GNU General Public License as published by |
| 14 | * the Free Software Foundation; either version 2 of the License, or |
| 15 | * (at your option) any later version. |
| 16 | * |
| 17 | * This program is distributed in the hope that it will be useful, |
| 18 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 19 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 20 | * GNU General Public License for more details. |
| 21 | * |
| 22 | * You should have received a copy of the GNU General Public License |
| 23 | * along with this program; if not, write to the Free Software |
| 24 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| 25 | * |
| 26 | * Should you need to contact me, the author, you can do so either by |
| 27 | * e-mail - mail your message to <vojtech@ucw.cz>, or by paper mail: |
| 28 | * Vojtech Pavlik, Simunkova 1594, Prague 8, 182 00 Czech Republic |
| 29 | */ |
| 30 | |
| 31 | #include <linux/kernel.h> |
| 32 | #include <linux/module.h> |
| 33 | #include <linux/slab.h> |
| 34 | #include <linux/init.h> |
| 35 | #include <linux/gameport.h> |
| 36 | #include <linux/input.h> |
Tim Schmielau | 4e57b68 | 2005-10-30 15:03:48 -0800 | [diff] [blame] | 37 | #include <linux/jiffies.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 38 | |
| 39 | #define DRIVER_DESC "Creative Labs Blaster GamePad Cobra driver" |
| 40 | |
| 41 | MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>"); |
| 42 | MODULE_DESCRIPTION(DRIVER_DESC); |
| 43 | MODULE_LICENSE("GPL"); |
| 44 | |
| 45 | #define COBRA_MAX_STROBE 45 /* 45 us max wait for first strobe */ |
| 46 | #define COBRA_LENGTH 36 |
| 47 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 48 | static int cobra_btn[] = { BTN_START, BTN_SELECT, BTN_TL, BTN_TR, BTN_X, BTN_Y, BTN_Z, BTN_A, BTN_B, BTN_C, BTN_TL2, BTN_TR2, 0 }; |
| 49 | |
| 50 | struct cobra { |
| 51 | struct gameport *gameport; |
Dmitry Torokhov | 17dd3f0 | 2005-09-15 02:01:52 -0500 | [diff] [blame] | 52 | struct input_dev *dev[2]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 53 | int reads; |
| 54 | int bads; |
| 55 | unsigned char exists; |
| 56 | char phys[2][32]; |
| 57 | }; |
| 58 | |
| 59 | static unsigned char cobra_read_packet(struct gameport *gameport, unsigned int *data) |
| 60 | { |
| 61 | unsigned long flags; |
| 62 | unsigned char u, v, w; |
| 63 | __u64 buf[2]; |
| 64 | int r[2], t[2]; |
| 65 | int i, j, ret; |
| 66 | |
| 67 | int strobe = gameport_time(gameport, COBRA_MAX_STROBE); |
| 68 | |
| 69 | for (i = 0; i < 2; i++) { |
| 70 | r[i] = buf[i] = 0; |
| 71 | t[i] = COBRA_MAX_STROBE; |
| 72 | } |
| 73 | |
| 74 | local_irq_save(flags); |
| 75 | |
| 76 | u = gameport_read(gameport); |
| 77 | |
| 78 | do { |
| 79 | t[0]--; t[1]--; |
| 80 | v = gameport_read(gameport); |
| 81 | for (i = 0, w = u ^ v; i < 2 && w; i++, w >>= 2) |
| 82 | if (w & 0x30) { |
| 83 | if ((w & 0x30) < 0x30 && r[i] < COBRA_LENGTH && t[i] > 0) { |
| 84 | buf[i] |= (__u64)((w >> 5) & 1) << r[i]++; |
| 85 | t[i] = strobe; |
| 86 | u = v; |
| 87 | } else t[i] = 0; |
| 88 | } |
| 89 | } while (t[0] > 0 || t[1] > 0); |
| 90 | |
| 91 | local_irq_restore(flags); |
| 92 | |
| 93 | ret = 0; |
| 94 | |
| 95 | for (i = 0; i < 2; i++) { |
| 96 | |
| 97 | if (r[i] != COBRA_LENGTH) continue; |
| 98 | |
| 99 | for (j = 0; j < COBRA_LENGTH && (buf[i] & 0x04104107f) ^ 0x041041040; j++) |
| 100 | buf[i] = (buf[i] >> 1) | ((__u64)(buf[i] & 1) << (COBRA_LENGTH - 1)); |
| 101 | |
| 102 | if (j < COBRA_LENGTH) ret |= (1 << i); |
| 103 | |
| 104 | data[i] = ((buf[i] >> 7) & 0x000001f) | ((buf[i] >> 8) & 0x00003e0) |
| 105 | | ((buf[i] >> 9) & 0x0007c00) | ((buf[i] >> 10) & 0x00f8000) |
| 106 | | ((buf[i] >> 11) & 0x1f00000); |
| 107 | |
| 108 | } |
| 109 | |
| 110 | return ret; |
| 111 | } |
| 112 | |
| 113 | static void cobra_poll(struct gameport *gameport) |
| 114 | { |
| 115 | struct cobra *cobra = gameport_get_drvdata(gameport); |
| 116 | struct input_dev *dev; |
| 117 | unsigned int data[2]; |
| 118 | int i, j, r; |
| 119 | |
| 120 | cobra->reads++; |
| 121 | |
| 122 | if ((r = cobra_read_packet(gameport, data)) != cobra->exists) { |
| 123 | cobra->bads++; |
| 124 | return; |
| 125 | } |
| 126 | |
| 127 | for (i = 0; i < 2; i++) |
| 128 | if (cobra->exists & r & (1 << i)) { |
| 129 | |
Dmitry Torokhov | 17dd3f0 | 2005-09-15 02:01:52 -0500 | [diff] [blame] | 130 | dev = cobra->dev[i]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 131 | |
| 132 | input_report_abs(dev, ABS_X, ((data[i] >> 4) & 1) - ((data[i] >> 3) & 1)); |
| 133 | input_report_abs(dev, ABS_Y, ((data[i] >> 2) & 1) - ((data[i] >> 1) & 1)); |
| 134 | |
| 135 | for (j = 0; cobra_btn[j]; j++) |
| 136 | input_report_key(dev, cobra_btn[j], data[i] & (0x20 << j)); |
| 137 | |
| 138 | input_sync(dev); |
| 139 | |
| 140 | } |
| 141 | } |
| 142 | |
| 143 | static int cobra_open(struct input_dev *dev) |
| 144 | { |
| 145 | struct cobra *cobra = dev->private; |
| 146 | |
| 147 | gameport_start_polling(cobra->gameport); |
| 148 | return 0; |
| 149 | } |
| 150 | |
| 151 | static void cobra_close(struct input_dev *dev) |
| 152 | { |
| 153 | struct cobra *cobra = dev->private; |
| 154 | |
| 155 | gameport_stop_polling(cobra->gameport); |
| 156 | } |
| 157 | |
| 158 | static int cobra_connect(struct gameport *gameport, struct gameport_driver *drv) |
| 159 | { |
| 160 | struct cobra *cobra; |
Dmitry Torokhov | 17dd3f0 | 2005-09-15 02:01:52 -0500 | [diff] [blame] | 161 | struct input_dev *input_dev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 162 | unsigned int data[2]; |
| 163 | int i, j; |
| 164 | int err; |
| 165 | |
Dmitry Torokhov | 17dd3f0 | 2005-09-15 02:01:52 -0500 | [diff] [blame] | 166 | cobra = kzalloc(sizeof(struct cobra), GFP_KERNEL); |
| 167 | if (!cobra) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 168 | return -ENOMEM; |
| 169 | |
| 170 | cobra->gameport = gameport; |
| 171 | |
| 172 | gameport_set_drvdata(gameport, cobra); |
| 173 | |
| 174 | err = gameport_open(gameport, drv, GAMEPORT_MODE_RAW); |
| 175 | if (err) |
| 176 | goto fail1; |
| 177 | |
| 178 | cobra->exists = cobra_read_packet(gameport, data); |
| 179 | |
| 180 | for (i = 0; i < 2; i++) |
| 181 | if ((cobra->exists >> i) & data[i] & 1) { |
| 182 | printk(KERN_WARNING "cobra.c: Device %d on %s has the Ext bit set. ID is: %d" |
| 183 | " Contact vojtech@ucw.cz\n", i, gameport->phys, (data[i] >> 2) & 7); |
| 184 | cobra->exists &= ~(1 << i); |
| 185 | } |
| 186 | |
| 187 | if (!cobra->exists) { |
| 188 | err = -ENODEV; |
| 189 | goto fail2; |
| 190 | } |
| 191 | |
| 192 | gameport_set_poll_handler(gameport, cobra_poll); |
| 193 | gameport_set_poll_interval(gameport, 20); |
| 194 | |
Dmitry Torokhov | 17dd3f0 | 2005-09-15 02:01:52 -0500 | [diff] [blame] | 195 | for (i = 0; i < 2; i++) { |
| 196 | if (~(cobra->exists >> i) & 1) |
| 197 | continue; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 198 | |
Dmitry Torokhov | 17dd3f0 | 2005-09-15 02:01:52 -0500 | [diff] [blame] | 199 | cobra->dev[i] = input_dev = input_allocate_device(); |
| 200 | if (!input_dev) { |
| 201 | err = -ENOMEM; |
| 202 | goto fail3; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 203 | } |
| 204 | |
Dmitry Torokhov | 17dd3f0 | 2005-09-15 02:01:52 -0500 | [diff] [blame] | 205 | sprintf(cobra->phys[i], "%s/input%d", gameport->phys, i); |
| 206 | |
| 207 | input_dev->name = "Creative Labs Blaster GamePad Cobra"; |
| 208 | input_dev->phys = cobra->phys[i]; |
| 209 | input_dev->id.bustype = BUS_GAMEPORT; |
| 210 | input_dev->id.vendor = GAMEPORT_ID_VENDOR_CREATIVE; |
| 211 | input_dev->id.product = 0x0008; |
| 212 | input_dev->id.version = 0x0100; |
| 213 | input_dev->cdev.dev = &gameport->dev; |
| 214 | input_dev->private = cobra; |
| 215 | |
| 216 | input_dev->open = cobra_open; |
| 217 | input_dev->close = cobra_close; |
| 218 | |
| 219 | input_dev->evbit[0] = BIT(EV_KEY) | BIT(EV_ABS); |
| 220 | input_set_abs_params(input_dev, ABS_X, -1, 1, 0, 0); |
| 221 | input_set_abs_params(input_dev, ABS_Y, -1, 1, 0, 0); |
| 222 | for (j = 0; cobra_btn[j]; j++) |
| 223 | set_bit(cobra_btn[j], input_dev->keybit); |
| 224 | |
| 225 | input_register_device(cobra->dev[i]); |
| 226 | } |
| 227 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 228 | return 0; |
| 229 | |
Dmitry Torokhov | 17dd3f0 | 2005-09-15 02:01:52 -0500 | [diff] [blame] | 230 | fail3: for (i = 0; i < 2; i++) |
| 231 | if (cobra->dev[i]) |
| 232 | input_unregister_device(cobra->dev[i]); |
| 233 | fail2: gameport_close(gameport); |
| 234 | fail1: gameport_set_drvdata(gameport, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 235 | kfree(cobra); |
| 236 | return err; |
| 237 | } |
| 238 | |
| 239 | static void cobra_disconnect(struct gameport *gameport) |
| 240 | { |
| 241 | struct cobra *cobra = gameport_get_drvdata(gameport); |
| 242 | int i; |
| 243 | |
| 244 | for (i = 0; i < 2; i++) |
| 245 | if ((cobra->exists >> i) & 1) |
Dmitry Torokhov | 17dd3f0 | 2005-09-15 02:01:52 -0500 | [diff] [blame] | 246 | input_unregister_device(cobra->dev[i]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 247 | gameport_close(gameport); |
| 248 | gameport_set_drvdata(gameport, NULL); |
| 249 | kfree(cobra); |
| 250 | } |
| 251 | |
| 252 | static struct gameport_driver cobra_drv = { |
| 253 | .driver = { |
| 254 | .name = "cobra", |
| 255 | }, |
| 256 | .description = DRIVER_DESC, |
| 257 | .connect = cobra_connect, |
| 258 | .disconnect = cobra_disconnect, |
| 259 | }; |
| 260 | |
| 261 | static int __init cobra_init(void) |
| 262 | { |
| 263 | gameport_register_driver(&cobra_drv); |
| 264 | return 0; |
| 265 | } |
| 266 | |
| 267 | static void __exit cobra_exit(void) |
| 268 | { |
| 269 | gameport_unregister_driver(&cobra_drv); |
| 270 | } |
| 271 | |
| 272 | module_init(cobra_init); |
| 273 | module_exit(cobra_exit); |