Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2 | * Copyright (c) 1999-2001 Vojtech Pavlik |
| 3 | */ |
| 4 | |
| 5 | /* |
| 6 | * Creative Labs Blaster GamePad Cobra driver for Linux |
| 7 | */ |
| 8 | |
| 9 | /* |
| 10 | * This program is free software; you can redistribute it and/or modify |
| 11 | * it under the terms of the GNU General Public License as published by |
| 12 | * the Free Software Foundation; either version 2 of the License, or |
| 13 | * (at your option) any later version. |
| 14 | * |
| 15 | * This program is distributed in the hope that it will be useful, |
| 16 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 17 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 18 | * GNU General Public License for more details. |
| 19 | * |
| 20 | * You should have received a copy of the GNU General Public License |
| 21 | * along with this program; if not, write to the Free Software |
| 22 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| 23 | * |
| 24 | * Should you need to contact me, the author, you can do so either by |
| 25 | * e-mail - mail your message to <vojtech@ucw.cz>, or by paper mail: |
| 26 | * Vojtech Pavlik, Simunkova 1594, Prague 8, 182 00 Czech Republic |
| 27 | */ |
| 28 | |
| 29 | #include <linux/kernel.h> |
| 30 | #include <linux/module.h> |
| 31 | #include <linux/slab.h> |
| 32 | #include <linux/init.h> |
| 33 | #include <linux/gameport.h> |
| 34 | #include <linux/input.h> |
Tim Schmielau | 4e57b68 | 2005-10-30 15:03:48 -0800 | [diff] [blame] | 35 | #include <linux/jiffies.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 36 | |
| 37 | #define DRIVER_DESC "Creative Labs Blaster GamePad Cobra driver" |
| 38 | |
| 39 | MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>"); |
| 40 | MODULE_DESCRIPTION(DRIVER_DESC); |
| 41 | MODULE_LICENSE("GPL"); |
| 42 | |
| 43 | #define COBRA_MAX_STROBE 45 /* 45 us max wait for first strobe */ |
| 44 | #define COBRA_LENGTH 36 |
| 45 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 46 | 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 }; |
| 47 | |
| 48 | struct cobra { |
| 49 | struct gameport *gameport; |
Dmitry Torokhov | 17dd3f0 | 2005-09-15 02:01:52 -0500 | [diff] [blame] | 50 | struct input_dev *dev[2]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 51 | int reads; |
| 52 | int bads; |
| 53 | unsigned char exists; |
| 54 | char phys[2][32]; |
| 55 | }; |
| 56 | |
| 57 | static unsigned char cobra_read_packet(struct gameport *gameport, unsigned int *data) |
| 58 | { |
| 59 | unsigned long flags; |
| 60 | unsigned char u, v, w; |
| 61 | __u64 buf[2]; |
| 62 | int r[2], t[2]; |
| 63 | int i, j, ret; |
| 64 | |
| 65 | int strobe = gameport_time(gameport, COBRA_MAX_STROBE); |
| 66 | |
| 67 | for (i = 0; i < 2; i++) { |
| 68 | r[i] = buf[i] = 0; |
| 69 | t[i] = COBRA_MAX_STROBE; |
| 70 | } |
| 71 | |
| 72 | local_irq_save(flags); |
| 73 | |
| 74 | u = gameport_read(gameport); |
| 75 | |
| 76 | do { |
| 77 | t[0]--; t[1]--; |
| 78 | v = gameport_read(gameport); |
| 79 | for (i = 0, w = u ^ v; i < 2 && w; i++, w >>= 2) |
| 80 | if (w & 0x30) { |
| 81 | if ((w & 0x30) < 0x30 && r[i] < COBRA_LENGTH && t[i] > 0) { |
| 82 | buf[i] |= (__u64)((w >> 5) & 1) << r[i]++; |
| 83 | t[i] = strobe; |
| 84 | u = v; |
| 85 | } else t[i] = 0; |
| 86 | } |
| 87 | } while (t[0] > 0 || t[1] > 0); |
| 88 | |
| 89 | local_irq_restore(flags); |
| 90 | |
| 91 | ret = 0; |
| 92 | |
| 93 | for (i = 0; i < 2; i++) { |
| 94 | |
| 95 | if (r[i] != COBRA_LENGTH) continue; |
| 96 | |
| 97 | for (j = 0; j < COBRA_LENGTH && (buf[i] & 0x04104107f) ^ 0x041041040; j++) |
| 98 | buf[i] = (buf[i] >> 1) | ((__u64)(buf[i] & 1) << (COBRA_LENGTH - 1)); |
| 99 | |
| 100 | if (j < COBRA_LENGTH) ret |= (1 << i); |
| 101 | |
| 102 | data[i] = ((buf[i] >> 7) & 0x000001f) | ((buf[i] >> 8) & 0x00003e0) |
| 103 | | ((buf[i] >> 9) & 0x0007c00) | ((buf[i] >> 10) & 0x00f8000) |
| 104 | | ((buf[i] >> 11) & 0x1f00000); |
| 105 | |
| 106 | } |
| 107 | |
| 108 | return ret; |
| 109 | } |
| 110 | |
| 111 | static void cobra_poll(struct gameport *gameport) |
| 112 | { |
| 113 | struct cobra *cobra = gameport_get_drvdata(gameport); |
| 114 | struct input_dev *dev; |
| 115 | unsigned int data[2]; |
| 116 | int i, j, r; |
| 117 | |
| 118 | cobra->reads++; |
| 119 | |
| 120 | if ((r = cobra_read_packet(gameport, data)) != cobra->exists) { |
| 121 | cobra->bads++; |
| 122 | return; |
| 123 | } |
| 124 | |
| 125 | for (i = 0; i < 2; i++) |
| 126 | if (cobra->exists & r & (1 << i)) { |
| 127 | |
Dmitry Torokhov | 17dd3f0 | 2005-09-15 02:01:52 -0500 | [diff] [blame] | 128 | dev = cobra->dev[i]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 129 | |
| 130 | input_report_abs(dev, ABS_X, ((data[i] >> 4) & 1) - ((data[i] >> 3) & 1)); |
| 131 | input_report_abs(dev, ABS_Y, ((data[i] >> 2) & 1) - ((data[i] >> 1) & 1)); |
| 132 | |
| 133 | for (j = 0; cobra_btn[j]; j++) |
| 134 | input_report_key(dev, cobra_btn[j], data[i] & (0x20 << j)); |
| 135 | |
| 136 | input_sync(dev); |
| 137 | |
| 138 | } |
| 139 | } |
| 140 | |
| 141 | static int cobra_open(struct input_dev *dev) |
| 142 | { |
Dmitry Torokhov | 8715c1c | 2007-04-12 01:34:14 -0400 | [diff] [blame] | 143 | struct cobra *cobra = input_get_drvdata(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 144 | |
| 145 | gameport_start_polling(cobra->gameport); |
| 146 | return 0; |
| 147 | } |
| 148 | |
| 149 | static void cobra_close(struct input_dev *dev) |
| 150 | { |
Dmitry Torokhov | 8715c1c | 2007-04-12 01:34:14 -0400 | [diff] [blame] | 151 | struct cobra *cobra = input_get_drvdata(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 152 | |
| 153 | gameport_stop_polling(cobra->gameport); |
| 154 | } |
| 155 | |
| 156 | static int cobra_connect(struct gameport *gameport, struct gameport_driver *drv) |
| 157 | { |
| 158 | struct cobra *cobra; |
Dmitry Torokhov | 17dd3f0 | 2005-09-15 02:01:52 -0500 | [diff] [blame] | 159 | struct input_dev *input_dev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 160 | unsigned int data[2]; |
| 161 | int i, j; |
| 162 | int err; |
| 163 | |
Dmitry Torokhov | 17dd3f0 | 2005-09-15 02:01:52 -0500 | [diff] [blame] | 164 | cobra = kzalloc(sizeof(struct cobra), GFP_KERNEL); |
| 165 | if (!cobra) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 166 | return -ENOMEM; |
| 167 | |
| 168 | cobra->gameport = gameport; |
| 169 | |
| 170 | gameport_set_drvdata(gameport, cobra); |
| 171 | |
| 172 | err = gameport_open(gameport, drv, GAMEPORT_MODE_RAW); |
| 173 | if (err) |
| 174 | goto fail1; |
| 175 | |
| 176 | cobra->exists = cobra_read_packet(gameport, data); |
| 177 | |
| 178 | for (i = 0; i < 2; i++) |
| 179 | if ((cobra->exists >> i) & data[i] & 1) { |
| 180 | printk(KERN_WARNING "cobra.c: Device %d on %s has the Ext bit set. ID is: %d" |
| 181 | " Contact vojtech@ucw.cz\n", i, gameport->phys, (data[i] >> 2) & 7); |
| 182 | cobra->exists &= ~(1 << i); |
| 183 | } |
| 184 | |
| 185 | if (!cobra->exists) { |
| 186 | err = -ENODEV; |
| 187 | goto fail2; |
| 188 | } |
| 189 | |
| 190 | gameport_set_poll_handler(gameport, cobra_poll); |
| 191 | gameport_set_poll_interval(gameport, 20); |
| 192 | |
Dmitry Torokhov | 17dd3f0 | 2005-09-15 02:01:52 -0500 | [diff] [blame] | 193 | for (i = 0; i < 2; i++) { |
| 194 | if (~(cobra->exists >> i) & 1) |
| 195 | continue; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 196 | |
Dmitry Torokhov | 17dd3f0 | 2005-09-15 02:01:52 -0500 | [diff] [blame] | 197 | cobra->dev[i] = input_dev = input_allocate_device(); |
| 198 | if (!input_dev) { |
| 199 | err = -ENOMEM; |
| 200 | goto fail3; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 201 | } |
| 202 | |
Dmitry Torokhov | 10ca4c0 | 2006-06-26 01:45:48 -0400 | [diff] [blame] | 203 | snprintf(cobra->phys[i], sizeof(cobra->phys[i]), |
| 204 | "%s/input%d", gameport->phys, i); |
Dmitry Torokhov | 17dd3f0 | 2005-09-15 02:01:52 -0500 | [diff] [blame] | 205 | |
| 206 | input_dev->name = "Creative Labs Blaster GamePad Cobra"; |
| 207 | input_dev->phys = cobra->phys[i]; |
| 208 | input_dev->id.bustype = BUS_GAMEPORT; |
| 209 | input_dev->id.vendor = GAMEPORT_ID_VENDOR_CREATIVE; |
| 210 | input_dev->id.product = 0x0008; |
| 211 | input_dev->id.version = 0x0100; |
Dmitry Torokhov | 935e658 | 2007-04-12 01:35:26 -0400 | [diff] [blame] | 212 | input_dev->dev.parent = &gameport->dev; |
Dmitry Torokhov | 8715c1c | 2007-04-12 01:34:14 -0400 | [diff] [blame] | 213 | |
| 214 | input_set_drvdata(input_dev, cobra); |
Dmitry Torokhov | 17dd3f0 | 2005-09-15 02:01:52 -0500 | [diff] [blame] | 215 | |
| 216 | input_dev->open = cobra_open; |
| 217 | input_dev->close = cobra_close; |
| 218 | |
Jiri Slaby | 7b19ada | 2007-10-18 23:40:32 -0700 | [diff] [blame] | 219 | input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS); |
Dmitry Torokhov | 17dd3f0 | 2005-09-15 02:01:52 -0500 | [diff] [blame] | 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 | |
Dmitry Torokhov | 127278c | 2006-11-05 22:40:09 -0500 | [diff] [blame] | 225 | err = input_register_device(cobra->dev[i]); |
| 226 | if (err) |
| 227 | goto fail4; |
Dmitry Torokhov | 17dd3f0 | 2005-09-15 02:01:52 -0500 | [diff] [blame] | 228 | } |
| 229 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 230 | return 0; |
| 231 | |
Dmitry Torokhov | 127278c | 2006-11-05 22:40:09 -0500 | [diff] [blame] | 232 | fail4: input_free_device(cobra->dev[i]); |
| 233 | fail3: while (--i >= 0) |
Dmitry Torokhov | 17dd3f0 | 2005-09-15 02:01:52 -0500 | [diff] [blame] | 234 | if (cobra->dev[i]) |
| 235 | input_unregister_device(cobra->dev[i]); |
| 236 | fail2: gameport_close(gameport); |
| 237 | fail1: gameport_set_drvdata(gameport, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 238 | kfree(cobra); |
| 239 | return err; |
| 240 | } |
| 241 | |
| 242 | static void cobra_disconnect(struct gameport *gameport) |
| 243 | { |
| 244 | struct cobra *cobra = gameport_get_drvdata(gameport); |
| 245 | int i; |
| 246 | |
| 247 | for (i = 0; i < 2; i++) |
| 248 | if ((cobra->exists >> i) & 1) |
Dmitry Torokhov | 17dd3f0 | 2005-09-15 02:01:52 -0500 | [diff] [blame] | 249 | input_unregister_device(cobra->dev[i]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 250 | gameport_close(gameport); |
| 251 | gameport_set_drvdata(gameport, NULL); |
| 252 | kfree(cobra); |
| 253 | } |
| 254 | |
| 255 | static struct gameport_driver cobra_drv = { |
| 256 | .driver = { |
| 257 | .name = "cobra", |
| 258 | }, |
| 259 | .description = DRIVER_DESC, |
| 260 | .connect = cobra_connect, |
| 261 | .disconnect = cobra_disconnect, |
| 262 | }; |
| 263 | |
Axel Lin | 98a8413 | 2012-04-03 23:52:27 -0700 | [diff] [blame] | 264 | module_gameport_driver(cobra_drv); |