Mauro Carvalho Chehab | d56410e | 2006-03-25 09:19:53 -0300 | [diff] [blame] | 1 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2 | * bt856 - BT856A Digital Video Encoder (Rockwell Part) |
| 3 | * |
| 4 | * Copyright (C) 1999 Mike Bernson <mike@mlb.org> |
| 5 | * Copyright (C) 1998 Dave Perks <dperks@ibm.net> |
| 6 | * |
| 7 | * Modifications for LML33/DC10plus unified driver |
| 8 | * Copyright (C) 2000 Serguei Miridonov <mirsev@cicese.mx> |
| 9 | * |
| 10 | * This code was modify/ported from the saa7111 driver written |
| 11 | * by Dave Perks. |
| 12 | * |
| 13 | * Changes by Ronald Bultje <rbultje@ronald.bitfreak.net> |
| 14 | * - moved over to linux>=2.4.x i2c protocol (9/9/2002) |
| 15 | * |
| 16 | * This program is free software; you can redistribute it and/or modify |
| 17 | * it under the terms of the GNU General Public License as published by |
| 18 | * the Free Software Foundation; either version 2 of the License, or |
| 19 | * (at your option) any later version. |
| 20 | * |
| 21 | * This program is distributed in the hope that it will be useful, |
| 22 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 23 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 24 | * GNU General Public License for more details. |
| 25 | * |
| 26 | * You should have received a copy of the GNU General Public License |
| 27 | * along with this program; if not, write to the Free Software |
| 28 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
| 29 | */ |
| 30 | |
| 31 | #include <linux/module.h> |
| 32 | #include <linux/init.h> |
| 33 | #include <linux/delay.h> |
| 34 | #include <linux/errno.h> |
| 35 | #include <linux/fs.h> |
| 36 | #include <linux/kernel.h> |
| 37 | #include <linux/major.h> |
| 38 | #include <linux/slab.h> |
| 39 | #include <linux/mm.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 40 | #include <linux/signal.h> |
Mauro Carvalho Chehab | 18f3fa1 | 2007-07-02 15:39:57 -0300 | [diff] [blame] | 41 | #include <linux/types.h> |
| 42 | #include <linux/i2c.h> |
| 43 | #include <linux/video_encoder.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 44 | #include <asm/io.h> |
| 45 | #include <asm/pgtable.h> |
| 46 | #include <asm/page.h> |
Mauro Carvalho Chehab | 18f3fa1 | 2007-07-02 15:39:57 -0300 | [diff] [blame] | 47 | #include <asm/uaccess.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 48 | |
| 49 | #include <linux/videodev.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 50 | |
| 51 | MODULE_DESCRIPTION("Brooktree-856A video encoder driver"); |
| 52 | MODULE_AUTHOR("Mike Bernson & Dave Perks"); |
| 53 | MODULE_LICENSE("GPL"); |
| 54 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 55 | |
| 56 | #define I2C_NAME(s) (s)->name |
| 57 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 58 | |
Douglas Schilling Landgraf | ff699e6 | 2008-04-22 14:41:48 -0300 | [diff] [blame^] | 59 | static int debug; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 60 | module_param(debug, int, 0); |
| 61 | MODULE_PARM_DESC(debug, "Debug level (0-1)"); |
| 62 | |
| 63 | #define dprintk(num, format, args...) \ |
| 64 | do { \ |
| 65 | if (debug >= num) \ |
| 66 | printk(format, ##args); \ |
| 67 | } while (0) |
| 68 | |
| 69 | /* ----------------------------------------------------------------------- */ |
| 70 | |
Jean Delvare | f49a5ea | 2006-03-22 03:48:36 -0300 | [diff] [blame] | 71 | #define REG_OFFSET 0xDA |
| 72 | #define BT856_NR_REG 6 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 73 | |
| 74 | struct bt856 { |
Jean Delvare | f49a5ea | 2006-03-22 03:48:36 -0300 | [diff] [blame] | 75 | unsigned char reg[BT856_NR_REG]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 76 | |
| 77 | int norm; |
| 78 | int enable; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 79 | }; |
| 80 | |
| 81 | #define I2C_BT856 0x88 |
| 82 | |
| 83 | /* ----------------------------------------------------------------------- */ |
| 84 | |
| 85 | static inline int |
| 86 | bt856_write (struct i2c_client *client, |
| 87 | u8 reg, |
| 88 | u8 value) |
| 89 | { |
| 90 | struct bt856 *encoder = i2c_get_clientdata(client); |
| 91 | |
| 92 | encoder->reg[reg - REG_OFFSET] = value; |
| 93 | return i2c_smbus_write_byte_data(client, reg, value); |
| 94 | } |
| 95 | |
| 96 | static inline int |
| 97 | bt856_setbit (struct i2c_client *client, |
| 98 | u8 reg, |
| 99 | u8 bit, |
| 100 | u8 value) |
| 101 | { |
| 102 | struct bt856 *encoder = i2c_get_clientdata(client); |
| 103 | |
| 104 | return bt856_write(client, reg, |
| 105 | (encoder-> |
| 106 | reg[reg - REG_OFFSET] & ~(1 << bit)) | |
| 107 | (value ? (1 << bit) : 0)); |
| 108 | } |
| 109 | |
| 110 | static void |
| 111 | bt856_dump (struct i2c_client *client) |
| 112 | { |
| 113 | int i; |
| 114 | struct bt856 *encoder = i2c_get_clientdata(client); |
| 115 | |
| 116 | printk(KERN_INFO "%s: register dump:", I2C_NAME(client)); |
Jean Delvare | f49a5ea | 2006-03-22 03:48:36 -0300 | [diff] [blame] | 117 | for (i = 0; i < BT856_NR_REG; i += 2) |
| 118 | printk(" %02x", encoder->reg[i]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 119 | printk("\n"); |
| 120 | } |
| 121 | |
| 122 | /* ----------------------------------------------------------------------- */ |
| 123 | |
| 124 | static int |
| 125 | bt856_command (struct i2c_client *client, |
| 126 | unsigned int cmd, |
| 127 | void *arg) |
| 128 | { |
| 129 | struct bt856 *encoder = i2c_get_clientdata(client); |
| 130 | |
| 131 | switch (cmd) { |
| 132 | |
| 133 | case 0: |
| 134 | /* This is just for testing!!! */ |
| 135 | dprintk(1, KERN_INFO "bt856: init\n"); |
| 136 | bt856_write(client, 0xdc, 0x18); |
| 137 | bt856_write(client, 0xda, 0); |
| 138 | bt856_write(client, 0xde, 0); |
| 139 | |
| 140 | bt856_setbit(client, 0xdc, 3, 1); |
| 141 | //bt856_setbit(client, 0xdc, 6, 0); |
| 142 | bt856_setbit(client, 0xdc, 4, 1); |
| 143 | |
| 144 | switch (encoder->norm) { |
| 145 | |
| 146 | case VIDEO_MODE_NTSC: |
| 147 | bt856_setbit(client, 0xdc, 2, 0); |
| 148 | break; |
| 149 | |
| 150 | case VIDEO_MODE_PAL: |
| 151 | bt856_setbit(client, 0xdc, 2, 1); |
| 152 | break; |
| 153 | } |
| 154 | |
| 155 | bt856_setbit(client, 0xdc, 1, 1); |
| 156 | bt856_setbit(client, 0xde, 4, 0); |
| 157 | bt856_setbit(client, 0xde, 3, 1); |
| 158 | if (debug != 0) |
| 159 | bt856_dump(client); |
| 160 | break; |
| 161 | |
| 162 | case ENCODER_GET_CAPABILITIES: |
| 163 | { |
| 164 | struct video_encoder_capability *cap = arg; |
| 165 | |
| 166 | dprintk(1, KERN_INFO "%s: get capabilities\n", |
| 167 | I2C_NAME(client)); |
| 168 | |
| 169 | cap->flags = VIDEO_ENCODER_PAL | |
| 170 | VIDEO_ENCODER_NTSC | |
| 171 | VIDEO_ENCODER_CCIR; |
| 172 | cap->inputs = 2; |
| 173 | cap->outputs = 1; |
| 174 | } |
| 175 | break; |
| 176 | |
| 177 | case ENCODER_SET_NORM: |
| 178 | { |
| 179 | int *iarg = arg; |
| 180 | |
| 181 | dprintk(1, KERN_INFO "%s: set norm %d\n", I2C_NAME(client), |
| 182 | *iarg); |
| 183 | |
| 184 | switch (*iarg) { |
| 185 | |
| 186 | case VIDEO_MODE_NTSC: |
| 187 | bt856_setbit(client, 0xdc, 2, 0); |
| 188 | break; |
| 189 | |
| 190 | case VIDEO_MODE_PAL: |
| 191 | bt856_setbit(client, 0xdc, 2, 1); |
| 192 | bt856_setbit(client, 0xda, 0, 0); |
| 193 | //bt856_setbit(client, 0xda, 0, 1); |
| 194 | break; |
| 195 | |
| 196 | default: |
| 197 | return -EINVAL; |
| 198 | |
| 199 | } |
| 200 | encoder->norm = *iarg; |
| 201 | if (debug != 0) |
| 202 | bt856_dump(client); |
| 203 | } |
| 204 | break; |
| 205 | |
| 206 | case ENCODER_SET_INPUT: |
| 207 | { |
| 208 | int *iarg = arg; |
| 209 | |
| 210 | dprintk(1, KERN_INFO "%s: set input %d\n", I2C_NAME(client), |
| 211 | *iarg); |
| 212 | |
| 213 | /* We only have video bus. |
| 214 | * iarg = 0: input is from bt819 |
| 215 | * iarg = 1: input is from ZR36060 */ |
| 216 | |
| 217 | switch (*iarg) { |
| 218 | |
| 219 | case 0: |
| 220 | bt856_setbit(client, 0xde, 4, 0); |
| 221 | bt856_setbit(client, 0xde, 3, 1); |
| 222 | bt856_setbit(client, 0xdc, 3, 1); |
| 223 | bt856_setbit(client, 0xdc, 6, 0); |
| 224 | break; |
| 225 | case 1: |
| 226 | bt856_setbit(client, 0xde, 4, 0); |
| 227 | bt856_setbit(client, 0xde, 3, 1); |
| 228 | bt856_setbit(client, 0xdc, 3, 1); |
| 229 | bt856_setbit(client, 0xdc, 6, 1); |
| 230 | break; |
| 231 | case 2: // Color bar |
| 232 | bt856_setbit(client, 0xdc, 3, 0); |
| 233 | bt856_setbit(client, 0xde, 4, 1); |
| 234 | break; |
| 235 | default: |
| 236 | return -EINVAL; |
| 237 | |
| 238 | } |
| 239 | |
| 240 | if (debug != 0) |
| 241 | bt856_dump(client); |
| 242 | } |
| 243 | break; |
| 244 | |
| 245 | case ENCODER_SET_OUTPUT: |
| 246 | { |
| 247 | int *iarg = arg; |
| 248 | |
| 249 | dprintk(1, KERN_INFO "%s: set output %d\n", I2C_NAME(client), |
| 250 | *iarg); |
| 251 | |
| 252 | /* not much choice of outputs */ |
| 253 | if (*iarg != 0) { |
| 254 | return -EINVAL; |
| 255 | } |
| 256 | } |
| 257 | break; |
| 258 | |
| 259 | case ENCODER_ENABLE_OUTPUT: |
| 260 | { |
| 261 | int *iarg = arg; |
| 262 | |
| 263 | encoder->enable = !!*iarg; |
| 264 | |
| 265 | dprintk(1, KERN_INFO "%s: enable output %d\n", |
| 266 | I2C_NAME(client), encoder->enable); |
| 267 | } |
| 268 | break; |
| 269 | |
| 270 | default: |
| 271 | return -EINVAL; |
| 272 | } |
| 273 | |
| 274 | return 0; |
| 275 | } |
| 276 | |
| 277 | /* ----------------------------------------------------------------------- */ |
| 278 | |
| 279 | /* |
| 280 | * Generic i2c probe |
| 281 | * concerning the addresses: i2c wants 7 bit (without the r/w bit), so '>>1' |
| 282 | */ |
| 283 | static unsigned short normal_i2c[] = { I2C_BT856 >> 1, I2C_CLIENT_END }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 284 | |
Jean Delvare | 68cc9d0 | 2005-04-02 20:04:41 +0200 | [diff] [blame] | 285 | static unsigned short ignore = I2C_CLIENT_END; |
Mauro Carvalho Chehab | d56410e | 2006-03-25 09:19:53 -0300 | [diff] [blame] | 286 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 287 | static struct i2c_client_address_data addr_data = { |
| 288 | .normal_i2c = normal_i2c, |
Jean Delvare | 68cc9d0 | 2005-04-02 20:04:41 +0200 | [diff] [blame] | 289 | .probe = &ignore, |
| 290 | .ignore = &ignore, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 291 | }; |
| 292 | |
| 293 | static struct i2c_driver i2c_driver_bt856; |
| 294 | |
| 295 | static int |
| 296 | bt856_detect_client (struct i2c_adapter *adapter, |
| 297 | int address, |
| 298 | int kind) |
| 299 | { |
| 300 | int i; |
| 301 | struct i2c_client *client; |
| 302 | struct bt856 *encoder; |
| 303 | |
| 304 | dprintk(1, |
| 305 | KERN_INFO |
| 306 | "bt856.c: detecting bt856 client on address 0x%x\n", |
| 307 | address << 1); |
| 308 | |
| 309 | /* Check if the adapter supports the needed features */ |
| 310 | if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) |
| 311 | return 0; |
| 312 | |
Panagiotis Issaris | 7408187 | 2006-01-11 19:40:56 -0200 | [diff] [blame] | 313 | client = kzalloc(sizeof(struct i2c_client), GFP_KERNEL); |
Al Viro | 5fa1247 | 2008-03-29 03:07:38 +0000 | [diff] [blame] | 314 | if (!client) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 315 | return -ENOMEM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 316 | client->addr = address; |
| 317 | client->adapter = adapter; |
| 318 | client->driver = &i2c_driver_bt856; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 319 | strlcpy(I2C_NAME(client), "bt856", sizeof(I2C_NAME(client))); |
| 320 | |
Panagiotis Issaris | 7408187 | 2006-01-11 19:40:56 -0200 | [diff] [blame] | 321 | encoder = kzalloc(sizeof(struct bt856), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 322 | if (encoder == NULL) { |
| 323 | kfree(client); |
| 324 | return -ENOMEM; |
| 325 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 326 | encoder->norm = VIDEO_MODE_NTSC; |
| 327 | encoder->enable = 1; |
| 328 | i2c_set_clientdata(client, encoder); |
| 329 | |
| 330 | i = i2c_attach_client(client); |
| 331 | if (i) { |
| 332 | kfree(client); |
| 333 | kfree(encoder); |
| 334 | return i; |
| 335 | } |
| 336 | |
| 337 | bt856_write(client, 0xdc, 0x18); |
| 338 | bt856_write(client, 0xda, 0); |
| 339 | bt856_write(client, 0xde, 0); |
| 340 | |
| 341 | bt856_setbit(client, 0xdc, 3, 1); |
| 342 | //bt856_setbit(client, 0xdc, 6, 0); |
| 343 | bt856_setbit(client, 0xdc, 4, 1); |
| 344 | |
| 345 | switch (encoder->norm) { |
| 346 | |
| 347 | case VIDEO_MODE_NTSC: |
| 348 | bt856_setbit(client, 0xdc, 2, 0); |
| 349 | break; |
| 350 | |
| 351 | case VIDEO_MODE_PAL: |
| 352 | bt856_setbit(client, 0xdc, 2, 1); |
| 353 | break; |
| 354 | } |
| 355 | |
| 356 | bt856_setbit(client, 0xdc, 1, 1); |
| 357 | bt856_setbit(client, 0xde, 4, 0); |
| 358 | bt856_setbit(client, 0xde, 3, 1); |
| 359 | |
| 360 | if (debug != 0) |
| 361 | bt856_dump(client); |
| 362 | |
| 363 | dprintk(1, KERN_INFO "%s_attach: at address 0x%x\n", I2C_NAME(client), |
| 364 | client->addr << 1); |
| 365 | |
| 366 | return 0; |
| 367 | } |
| 368 | |
| 369 | static int |
| 370 | bt856_attach_adapter (struct i2c_adapter *adapter) |
| 371 | { |
| 372 | dprintk(1, |
| 373 | KERN_INFO |
| 374 | "bt856.c: starting probe for adapter %s (0x%x)\n", |
| 375 | I2C_NAME(adapter), adapter->id); |
| 376 | return i2c_probe(adapter, &addr_data, &bt856_detect_client); |
| 377 | } |
| 378 | |
| 379 | static int |
| 380 | bt856_detach_client (struct i2c_client *client) |
| 381 | { |
| 382 | struct bt856 *encoder = i2c_get_clientdata(client); |
| 383 | int err; |
| 384 | |
| 385 | err = i2c_detach_client(client); |
| 386 | if (err) { |
| 387 | return err; |
| 388 | } |
| 389 | |
| 390 | kfree(encoder); |
| 391 | kfree(client); |
| 392 | |
| 393 | return 0; |
| 394 | } |
| 395 | |
| 396 | /* ----------------------------------------------------------------------- */ |
| 397 | |
| 398 | static struct i2c_driver i2c_driver_bt856 = { |
Laurent Riffard | 604f28e | 2005-11-26 20:43:39 +0100 | [diff] [blame] | 399 | .driver = { |
Laurent Riffard | 604f28e | 2005-11-26 20:43:39 +0100 | [diff] [blame] | 400 | .name = "bt856", |
| 401 | }, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 402 | |
| 403 | .id = I2C_DRIVERID_BT856, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 404 | |
| 405 | .attach_adapter = bt856_attach_adapter, |
| 406 | .detach_client = bt856_detach_client, |
| 407 | .command = bt856_command, |
| 408 | }; |
| 409 | |
| 410 | static int __init |
| 411 | bt856_init (void) |
| 412 | { |
| 413 | return i2c_add_driver(&i2c_driver_bt856); |
| 414 | } |
| 415 | |
| 416 | static void __exit |
| 417 | bt856_exit (void) |
| 418 | { |
| 419 | i2c_del_driver(&i2c_driver_bt856); |
| 420 | } |
| 421 | |
| 422 | module_init(bt856_init); |
| 423 | module_exit(bt856_exit); |