Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Driver for the SAA5246A or SAA5281 Teletext (=Videotext) decoder chips from |
| 3 | * Philips. |
| 4 | * |
| 5 | * Only capturing of Teletext pages is tested. The videotext chips also have a |
| 6 | * TV output but my hardware doesn't use it. For this reason this driver does |
| 7 | * not support changing any TV display settings. |
| 8 | * |
| 9 | * Copyright (C) 2004 Michael Geng <linux@MichaelGeng.de> |
| 10 | * |
| 11 | * Derived from |
| 12 | * |
| 13 | * saa5249 driver |
| 14 | * Copyright (C) 1998 Richard Guenther |
| 15 | * <richard.guenther@student.uni-tuebingen.de> |
| 16 | * |
| 17 | * with changes by |
Alan Cox | d9b0144 | 2008-10-27 15:13:47 -0300 | [diff] [blame] | 18 | * Alan Cox <alan@lxorguk.ukuu.org.uk> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 19 | * |
| 20 | * and |
| 21 | * |
| 22 | * vtx.c |
| 23 | * Copyright (C) 1994-97 Martin Buck <martin-2.buck@student.uni-ulm.de> |
| 24 | * |
| 25 | * This program is free software; you can redistribute it and/or modify |
| 26 | * it under the terms of the GNU General Public License as published by |
| 27 | * the Free Software Foundation; either version 2 of the License, or |
| 28 | * (at your option) any later version. |
| 29 | * |
| 30 | * This program is distributed in the hope that it will be useful, |
| 31 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 32 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 33 | * GNU General Public License for more details. |
| 34 | * |
| 35 | * You should have received a copy of the GNU General Public License |
| 36 | * along with this program; if not, write to the Free Software |
| 37 | * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, |
| 38 | * USA. |
| 39 | */ |
| 40 | |
| 41 | #include <linux/module.h> |
| 42 | #include <linux/kernel.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 43 | #include <linux/mm.h> |
| 44 | #include <linux/init.h> |
| 45 | #include <linux/i2c.h> |
Hans Verkuil | d56dc61 | 2008-07-30 08:43:36 -0300 | [diff] [blame] | 46 | #include <linux/smp_lock.h> |
Hans Verkuil | 71ef85c | 2008-09-07 08:31:13 -0300 | [diff] [blame] | 47 | #include <linux/mutex.h> |
| 48 | #include <linux/videotext.h> |
Hans Verkuil | 1b8dac1 | 2009-02-07 11:18:05 -0300 | [diff] [blame] | 49 | #include <linux/videodev2.h> |
| 50 | #include <media/v4l2-device.h> |
| 51 | #include <media/v4l2-chip-ident.h> |
Hans Verkuil | 35ea11f | 2008-07-20 08:12:02 -0300 | [diff] [blame] | 52 | #include <media/v4l2-ioctl.h> |
Hans Verkuil | 1b8dac1 | 2009-02-07 11:18:05 -0300 | [diff] [blame] | 53 | #include <media/v4l2-i2c-drv.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 54 | |
| 55 | MODULE_AUTHOR("Michael Geng <linux@MichaelGeng.de>"); |
| 56 | MODULE_DESCRIPTION("Philips SAA5246A, SAA5281 Teletext decoder driver"); |
| 57 | MODULE_LICENSE("GPL"); |
| 58 | |
Hans Verkuil | 71ef85c | 2008-09-07 08:31:13 -0300 | [diff] [blame] | 59 | #define MAJOR_VERSION 1 /* driver major version number */ |
| 60 | #define MINOR_VERSION 8 /* driver minor version number */ |
| 61 | |
| 62 | /* Number of DAUs = number of pages that can be searched at the same time. */ |
| 63 | #define NUM_DAUS 4 |
| 64 | |
| 65 | #define NUM_ROWS_PER_PAGE 40 |
| 66 | |
| 67 | /* first column is 0 (not 1) */ |
| 68 | #define POS_TIME_START 32 |
| 69 | #define POS_TIME_END 39 |
| 70 | |
| 71 | #define POS_HEADER_START 7 |
| 72 | #define POS_HEADER_END 31 |
| 73 | |
| 74 | /* Returns 'true' if the part of the videotext page described with req contains |
| 75 | (at least parts of) the time field */ |
| 76 | #define REQ_CONTAINS_TIME(p_req) \ |
| 77 | ((p_req)->start <= POS_TIME_END && \ |
| 78 | (p_req)->end >= POS_TIME_START) |
| 79 | |
| 80 | /* Returns 'true' if the part of the videotext page described with req contains |
| 81 | (at least parts of) the page header */ |
| 82 | #define REQ_CONTAINS_HEADER(p_req) \ |
| 83 | ((p_req)->start <= POS_HEADER_END && \ |
| 84 | (p_req)->end >= POS_HEADER_START) |
| 85 | |
| 86 | /*****************************************************************************/ |
| 87 | /* Mode register numbers of the SAA5246A */ |
| 88 | /*****************************************************************************/ |
| 89 | #define SAA5246A_REGISTER_R0 0 |
| 90 | #define SAA5246A_REGISTER_R1 1 |
| 91 | #define SAA5246A_REGISTER_R2 2 |
| 92 | #define SAA5246A_REGISTER_R3 3 |
| 93 | #define SAA5246A_REGISTER_R4 4 |
| 94 | #define SAA5246A_REGISTER_R5 5 |
| 95 | #define SAA5246A_REGISTER_R6 6 |
| 96 | #define SAA5246A_REGISTER_R7 7 |
| 97 | #define SAA5246A_REGISTER_R8 8 |
| 98 | #define SAA5246A_REGISTER_R9 9 |
| 99 | #define SAA5246A_REGISTER_R10 10 |
| 100 | #define SAA5246A_REGISTER_R11 11 |
| 101 | #define SAA5246A_REGISTER_R11B 11 |
| 102 | |
| 103 | /* SAA5246A mode registers often autoincrement to the next register. |
| 104 | Therefore we use variable argument lists. The following macro indicates |
| 105 | the end of a command list. */ |
| 106 | #define COMMAND_END (-1) |
| 107 | |
| 108 | /*****************************************************************************/ |
| 109 | /* Contents of the mode registers of the SAA5246A */ |
| 110 | /*****************************************************************************/ |
| 111 | /* Register R0 (Advanced Control) */ |
| 112 | #define R0_SELECT_R11 0x00 |
| 113 | #define R0_SELECT_R11B 0x01 |
| 114 | |
| 115 | #define R0_PLL_TIME_CONSTANT_LONG 0x00 |
| 116 | #define R0_PLL_TIME_CONSTANT_SHORT 0x02 |
| 117 | |
| 118 | #define R0_ENABLE_nODD_EVEN_OUTPUT 0x00 |
| 119 | #define R0_DISABLE_nODD_EVEN_OUTPUT 0x04 |
| 120 | |
| 121 | #define R0_ENABLE_HDR_POLL 0x00 |
| 122 | #define R0_DISABLE_HDR_POLL 0x10 |
| 123 | |
| 124 | #define R0_DO_NOT_FORCE_nODD_EVEN_LOW_IF_PICTURE_DISPLAYED 0x00 |
| 125 | #define R0_FORCE_nODD_EVEN_LOW_IF_PICTURE_DISPLAYED 0x20 |
| 126 | |
| 127 | #define R0_NO_FREE_RUN_PLL 0x00 |
| 128 | #define R0_FREE_RUN_PLL 0x40 |
| 129 | |
| 130 | #define R0_NO_AUTOMATIC_FASTEXT_PROMPT 0x00 |
| 131 | #define R0_AUTOMATIC_FASTEXT_PROMPT 0x80 |
| 132 | |
| 133 | /* Register R1 (Mode) */ |
| 134 | #define R1_INTERLACED_312_AND_HALF_312_AND_HALF_LINES 0x00 |
| 135 | #define R1_NON_INTERLACED_312_313_LINES 0x01 |
| 136 | #define R1_NON_INTERLACED_312_312_LINES 0x02 |
| 137 | #define R1_FFB_LEADING_EDGE_IN_FIRST_BROAD_PULSE 0x03 |
| 138 | #define R1_FFB_LEADING_EDGE_IN_SECOND_BROAD_PULSE 0x07 |
| 139 | |
| 140 | #define R1_DEW 0x00 |
| 141 | #define R1_FULL_FIELD 0x08 |
| 142 | |
| 143 | #define R1_EXTENDED_PACKET_DISABLE 0x00 |
| 144 | #define R1_EXTENDED_PACKET_ENABLE 0x10 |
| 145 | |
| 146 | #define R1_DAUS_ALL_ON 0x00 |
| 147 | #define R1_DAUS_ALL_OFF 0x20 |
| 148 | |
| 149 | #define R1_7_BITS_PLUS_PARITY 0x00 |
| 150 | #define R1_8_BITS_NO_PARITY 0x40 |
| 151 | |
| 152 | #define R1_VCS_TO_SCS 0x00 |
| 153 | #define R1_NO_VCS_TO_SCS 0x80 |
| 154 | |
| 155 | /* Register R2 (Page request address) */ |
| 156 | #define R2_IN_R3_SELECT_PAGE_HUNDREDS 0x00 |
| 157 | #define R2_IN_R3_SELECT_PAGE_TENS 0x01 |
| 158 | #define R2_IN_R3_SELECT_PAGE_UNITS 0x02 |
| 159 | #define R2_IN_R3_SELECT_HOURS_TENS 0x03 |
| 160 | #define R2_IN_R3_SELECT_HOURS_UNITS 0x04 |
| 161 | #define R2_IN_R3_SELECT_MINUTES_TENS 0x05 |
| 162 | #define R2_IN_R3_SELECT_MINUTES_UNITS 0x06 |
| 163 | |
| 164 | #define R2_DAU_0 0x00 |
| 165 | #define R2_DAU_1 0x10 |
| 166 | #define R2_DAU_2 0x20 |
| 167 | #define R2_DAU_3 0x30 |
| 168 | |
| 169 | #define R2_BANK_0 0x00 |
| 170 | #define R2_BANK 1 0x40 |
| 171 | |
| 172 | #define R2_HAMMING_CHECK_ON 0x80 |
| 173 | #define R2_HAMMING_CHECK_OFF 0x00 |
| 174 | |
| 175 | /* Register R3 (Page request data) */ |
| 176 | #define R3_PAGE_HUNDREDS_0 0x00 |
| 177 | #define R3_PAGE_HUNDREDS_1 0x01 |
| 178 | #define R3_PAGE_HUNDREDS_2 0x02 |
| 179 | #define R3_PAGE_HUNDREDS_3 0x03 |
| 180 | #define R3_PAGE_HUNDREDS_4 0x04 |
| 181 | #define R3_PAGE_HUNDREDS_5 0x05 |
| 182 | #define R3_PAGE_HUNDREDS_6 0x06 |
| 183 | #define R3_PAGE_HUNDREDS_7 0x07 |
| 184 | |
| 185 | #define R3_HOLD_PAGE 0x00 |
| 186 | #define R3_UPDATE_PAGE 0x08 |
| 187 | |
| 188 | #define R3_PAGE_HUNDREDS_DO_NOT_CARE 0x00 |
| 189 | #define R3_PAGE_HUNDREDS_DO_CARE 0x10 |
| 190 | |
| 191 | #define R3_PAGE_TENS_DO_NOT_CARE 0x00 |
| 192 | #define R3_PAGE_TENS_DO_CARE 0x10 |
| 193 | |
| 194 | #define R3_PAGE_UNITS_DO_NOT_CARE 0x00 |
| 195 | #define R3_PAGE_UNITS_DO_CARE 0x10 |
| 196 | |
| 197 | #define R3_HOURS_TENS_DO_NOT_CARE 0x00 |
| 198 | #define R3_HOURS_TENS_DO_CARE 0x10 |
| 199 | |
| 200 | #define R3_HOURS_UNITS_DO_NOT_CARE 0x00 |
| 201 | #define R3_HOURS_UNITS_DO_CARE 0x10 |
| 202 | |
| 203 | #define R3_MINUTES_TENS_DO_NOT_CARE 0x00 |
| 204 | #define R3_MINUTES_TENS_DO_CARE 0x10 |
| 205 | |
| 206 | #define R3_MINUTES_UNITS_DO_NOT_CARE 0x00 |
| 207 | #define R3_MINUTES_UNITS_DO_CARE 0x10 |
| 208 | |
| 209 | /* Register R4 (Display chapter) */ |
| 210 | #define R4_DISPLAY_PAGE_0 0x00 |
| 211 | #define R4_DISPLAY_PAGE_1 0x01 |
| 212 | #define R4_DISPLAY_PAGE_2 0x02 |
| 213 | #define R4_DISPLAY_PAGE_3 0x03 |
| 214 | #define R4_DISPLAY_PAGE_4 0x04 |
| 215 | #define R4_DISPLAY_PAGE_5 0x05 |
| 216 | #define R4_DISPLAY_PAGE_6 0x06 |
| 217 | #define R4_DISPLAY_PAGE_7 0x07 |
| 218 | |
| 219 | /* Register R5 (Normal display control) */ |
| 220 | #define R5_PICTURE_INSIDE_BOXING_OFF 0x00 |
| 221 | #define R5_PICTURE_INSIDE_BOXING_ON 0x01 |
| 222 | |
| 223 | #define R5_PICTURE_OUTSIDE_BOXING_OFF 0x00 |
| 224 | #define R5_PICTURE_OUTSIDE_BOXING_ON 0x02 |
| 225 | |
| 226 | #define R5_TEXT_INSIDE_BOXING_OFF 0x00 |
| 227 | #define R5_TEXT_INSIDE_BOXING_ON 0x04 |
| 228 | |
| 229 | #define R5_TEXT_OUTSIDE_BOXING_OFF 0x00 |
| 230 | #define R5_TEXT_OUTSIDE_BOXING_ON 0x08 |
| 231 | |
| 232 | #define R5_CONTRAST_REDUCTION_INSIDE_BOXING_OFF 0x00 |
| 233 | #define R5_CONTRAST_REDUCTION_INSIDE_BOXING_ON 0x10 |
| 234 | |
| 235 | #define R5_CONTRAST_REDUCTION_OUTSIDE_BOXING_OFF 0x00 |
| 236 | #define R5_CONTRAST_REDUCTION_OUTSIDE_BOXING_ON 0x20 |
| 237 | |
| 238 | #define R5_BACKGROUND_COLOR_INSIDE_BOXING_OFF 0x00 |
| 239 | #define R5_BACKGROUND_COLOR_INSIDE_BOXING_ON 0x40 |
| 240 | |
| 241 | #define R5_BACKGROUND_COLOR_OUTSIDE_BOXING_OFF 0x00 |
| 242 | #define R5_BACKGROUND_COLOR_OUTSIDE_BOXING_ON 0x80 |
| 243 | |
| 244 | /* Register R6 (Newsflash display) */ |
| 245 | #define R6_NEWSFLASH_PICTURE_INSIDE_BOXING_OFF 0x00 |
| 246 | #define R6_NEWSFLASH_PICTURE_INSIDE_BOXING_ON 0x01 |
| 247 | |
| 248 | #define R6_NEWSFLASH_PICTURE_OUTSIDE_BOXING_OFF 0x00 |
| 249 | #define R6_NEWSFLASH_PICTURE_OUTSIDE_BOXING_ON 0x02 |
| 250 | |
| 251 | #define R6_NEWSFLASH_TEXT_INSIDE_BOXING_OFF 0x00 |
| 252 | #define R6_NEWSFLASH_TEXT_INSIDE_BOXING_ON 0x04 |
| 253 | |
| 254 | #define R6_NEWSFLASH_TEXT_OUTSIDE_BOXING_OFF 0x00 |
| 255 | #define R6_NEWSFLASH_TEXT_OUTSIDE_BOXING_ON 0x08 |
| 256 | |
| 257 | #define R6_NEWSFLASH_CONTRAST_REDUCTION_INSIDE_BOXING_OFF 0x00 |
| 258 | #define R6_NEWSFLASH_CONTRAST_REDUCTION_INSIDE_BOXING_ON 0x10 |
| 259 | |
| 260 | #define R6_NEWSFLASH_CONTRAST_REDUCTION_OUTSIDE_BOXING_OFF 0x00 |
| 261 | #define R6_NEWSFLASH_CONTRAST_REDUCTION_OUTSIDE_BOXING_ON 0x20 |
| 262 | |
| 263 | #define R6_NEWSFLASH_BACKGROUND_COLOR_INSIDE_BOXING_OFF 0x00 |
| 264 | #define R6_NEWSFLASH_BACKGROUND_COLOR_INSIDE_BOXING_ON 0x40 |
| 265 | |
| 266 | #define R6_NEWSFLASH_BACKGROUND_COLOR_OUTSIDE_BOXING_OFF 0x00 |
| 267 | #define R6_NEWSFLASH_BACKGROUND_COLOR_OUTSIDE_BOXING_ON 0x80 |
| 268 | |
| 269 | /* Register R7 (Display mode) */ |
| 270 | #define R7_BOX_OFF_ROW_0 0x00 |
| 271 | #define R7_BOX_ON_ROW_0 0x01 |
| 272 | |
| 273 | #define R7_BOX_OFF_ROW_1_TO_23 0x00 |
| 274 | #define R7_BOX_ON_ROW_1_TO_23 0x02 |
| 275 | |
| 276 | #define R7_BOX_OFF_ROW_24 0x00 |
| 277 | #define R7_BOX_ON_ROW_24 0x04 |
| 278 | |
| 279 | #define R7_SINGLE_HEIGHT 0x00 |
| 280 | #define R7_DOUBLE_HEIGHT 0x08 |
| 281 | |
| 282 | #define R7_TOP_HALF 0x00 |
| 283 | #define R7_BOTTOM_HALF 0x10 |
| 284 | |
| 285 | #define R7_REVEAL_OFF 0x00 |
| 286 | #define R7_REVEAL_ON 0x20 |
| 287 | |
| 288 | #define R7_CURSER_OFF 0x00 |
| 289 | #define R7_CURSER_ON 0x40 |
| 290 | |
| 291 | #define R7_STATUS_BOTTOM 0x00 |
| 292 | #define R7_STATUS_TOP 0x80 |
| 293 | |
| 294 | /* Register R8 (Active chapter) */ |
| 295 | #define R8_ACTIVE_CHAPTER_0 0x00 |
| 296 | #define R8_ACTIVE_CHAPTER_1 0x01 |
| 297 | #define R8_ACTIVE_CHAPTER_2 0x02 |
| 298 | #define R8_ACTIVE_CHAPTER_3 0x03 |
| 299 | #define R8_ACTIVE_CHAPTER_4 0x04 |
| 300 | #define R8_ACTIVE_CHAPTER_5 0x05 |
| 301 | #define R8_ACTIVE_CHAPTER_6 0x06 |
| 302 | #define R8_ACTIVE_CHAPTER_7 0x07 |
| 303 | |
| 304 | #define R8_CLEAR_MEMORY 0x08 |
| 305 | #define R8_DO_NOT_CLEAR_MEMORY 0x00 |
| 306 | |
| 307 | /* Register R9 (Curser row) */ |
| 308 | #define R9_CURSER_ROW_0 0x00 |
| 309 | #define R9_CURSER_ROW_1 0x01 |
| 310 | #define R9_CURSER_ROW_2 0x02 |
| 311 | #define R9_CURSER_ROW_25 0x19 |
| 312 | |
| 313 | /* Register R10 (Curser column) */ |
| 314 | #define R10_CURSER_COLUMN_0 0x00 |
| 315 | #define R10_CURSER_COLUMN_6 0x06 |
| 316 | #define R10_CURSER_COLUMN_8 0x08 |
| 317 | |
| 318 | /*****************************************************************************/ |
| 319 | /* Row 25 control data in column 0 to 9 */ |
| 320 | /*****************************************************************************/ |
| 321 | #define ROW25_COLUMN0_PAGE_UNITS 0x0F |
| 322 | |
| 323 | #define ROW25_COLUMN1_PAGE_TENS 0x0F |
| 324 | |
| 325 | #define ROW25_COLUMN2_MINUTES_UNITS 0x0F |
| 326 | |
| 327 | #define ROW25_COLUMN3_MINUTES_TENS 0x07 |
| 328 | #define ROW25_COLUMN3_DELETE_PAGE 0x08 |
| 329 | |
| 330 | #define ROW25_COLUMN4_HOUR_UNITS 0x0F |
| 331 | |
| 332 | #define ROW25_COLUMN5_HOUR_TENS 0x03 |
| 333 | #define ROW25_COLUMN5_INSERT_HEADLINE 0x04 |
| 334 | #define ROW25_COLUMN5_INSERT_SUBTITLE 0x08 |
| 335 | |
| 336 | #define ROW25_COLUMN6_SUPPRESS_HEADER 0x01 |
| 337 | #define ROW25_COLUMN6_UPDATE_PAGE 0x02 |
| 338 | #define ROW25_COLUMN6_INTERRUPTED_SEQUENCE 0x04 |
| 339 | #define ROW25_COLUMN6_SUPPRESS_DISPLAY 0x08 |
| 340 | |
| 341 | #define ROW25_COLUMN7_SERIAL_MODE 0x01 |
| 342 | #define ROW25_COLUMN7_CHARACTER_SET 0x0E |
| 343 | |
| 344 | #define ROW25_COLUMN8_PAGE_HUNDREDS 0x07 |
| 345 | #define ROW25_COLUMN8_PAGE_NOT_FOUND 0x10 |
| 346 | |
| 347 | #define ROW25_COLUMN9_PAGE_BEING_LOOKED_FOR 0x20 |
| 348 | |
| 349 | #define ROW25_COLUMN0_TO_7_HAMMING_ERROR 0x10 |
| 350 | |
| 351 | /*****************************************************************************/ |
| 352 | /* Helper macros for extracting page, hour and minute digits */ |
| 353 | /*****************************************************************************/ |
| 354 | /* BYTE_POS 0 is at row 0, column 0, |
| 355 | BYTE_POS 1 is at row 0, column 1, |
| 356 | BYTE_POS 40 is at row 1, column 0, (with NUM_ROWS_PER_PAGE = 40) |
| 357 | BYTE_POS 41 is at row 1, column 1, (with NUM_ROWS_PER_PAGE = 40), |
| 358 | ... */ |
| 359 | #define ROW(BYTE_POS) (BYTE_POS / NUM_ROWS_PER_PAGE) |
| 360 | #define COLUMN(BYTE_POS) (BYTE_POS % NUM_ROWS_PER_PAGE) |
| 361 | |
| 362 | /*****************************************************************************/ |
| 363 | /* Helper macros for extracting page, hour and minute digits */ |
| 364 | /*****************************************************************************/ |
| 365 | /* Macros for extracting hundreds, tens and units of a page number which |
| 366 | must be in the range 0 ... 0x799. |
| 367 | Note that page is coded in hexadecimal, i.e. 0x123 means page 123. |
| 368 | page 0x.. means page 8.. */ |
| 369 | #define HUNDREDS_OF_PAGE(page) (((page) / 0x100) & 0x7) |
| 370 | #define TENS_OF_PAGE(page) (((page) / 0x10) & 0xF) |
| 371 | #define UNITS_OF_PAGE(page) ((page) & 0xF) |
| 372 | |
| 373 | /* Macros for extracting tens and units of a hour information which |
| 374 | must be in the range 0 ... 0x24. |
| 375 | Note that hour is coded in hexadecimal, i.e. 0x12 means 12 hours */ |
| 376 | #define TENS_OF_HOUR(hour) ((hour) / 0x10) |
| 377 | #define UNITS_OF_HOUR(hour) ((hour) & 0xF) |
| 378 | |
| 379 | /* Macros for extracting tens and units of a minute information which |
| 380 | must be in the range 0 ... 0x59. |
| 381 | Note that minute is coded in hexadecimal, i.e. 0x12 means 12 minutes */ |
| 382 | #define TENS_OF_MINUTE(minute) ((minute) / 0x10) |
| 383 | #define UNITS_OF_MINUTE(minute) ((minute) & 0xF) |
| 384 | |
| 385 | #define HOUR_MAX 0x23 |
| 386 | #define MINUTE_MAX 0x59 |
| 387 | #define PAGE_MAX 0x8FF |
| 388 | |
| 389 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 390 | struct saa5246a_device |
| 391 | { |
Hans Verkuil | 1b8dac1 | 2009-02-07 11:18:05 -0300 | [diff] [blame] | 392 | struct v4l2_subdev sd; |
| 393 | struct video_device *vdev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 394 | u8 pgbuf[NUM_DAUS][VTX_VIRTUALSIZE]; |
| 395 | int is_searching[NUM_DAUS]; |
Hans Verkuil | 7d43cd5 | 2008-08-23 05:31:47 -0300 | [diff] [blame] | 396 | unsigned long in_use; |
Ingo Molnar | 3593cab | 2006-02-07 06:49:14 -0200 | [diff] [blame] | 397 | struct mutex lock; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 398 | }; |
| 399 | |
Hans Verkuil | 1b8dac1 | 2009-02-07 11:18:05 -0300 | [diff] [blame] | 400 | static inline struct saa5246a_device *to_dev(struct v4l2_subdev *sd) |
| 401 | { |
| 402 | return container_of(sd, struct saa5246a_device, sd); |
| 403 | } |
| 404 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 405 | static struct video_device saa_template; /* Declared near bottom */ |
| 406 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 407 | /* |
| 408 | * I2C interfaces |
| 409 | */ |
| 410 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 411 | static int i2c_sendbuf(struct saa5246a_device *t, int reg, int count, u8 *data) |
| 412 | { |
Hans Verkuil | 1b8dac1 | 2009-02-07 11:18:05 -0300 | [diff] [blame] | 413 | struct i2c_client *client = v4l2_get_subdevdata(&t->sd); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 414 | char buf[64]; |
| 415 | |
| 416 | buf[0] = reg; |
| 417 | memcpy(buf+1, data, count); |
| 418 | |
Hans Verkuil | 1b8dac1 | 2009-02-07 11:18:05 -0300 | [diff] [blame] | 419 | if (i2c_master_send(client, buf, count + 1) == count + 1) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 420 | return 0; |
| 421 | return -1; |
| 422 | } |
| 423 | |
| 424 | static int i2c_senddata(struct saa5246a_device *t, ...) |
| 425 | { |
| 426 | unsigned char buf[64]; |
| 427 | int v; |
Richard Knutsson | b730a81 | 2007-11-27 06:59:37 -0300 | [diff] [blame] | 428 | int ct = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 429 | va_list argp; |
Richard Knutsson | b730a81 | 2007-11-27 06:59:37 -0300 | [diff] [blame] | 430 | va_start(argp, t); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 431 | |
Richard Knutsson | b730a81 | 2007-11-27 06:59:37 -0300 | [diff] [blame] | 432 | while ((v = va_arg(argp, int)) != -1) |
| 433 | buf[ct++] = v; |
| 434 | |
| 435 | va_end(argp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 436 | return i2c_sendbuf(t, buf[0], ct-1, buf+1); |
| 437 | } |
| 438 | |
Marcin Garski | db95517 | 2007-10-19 23:22:11 +0200 | [diff] [blame] | 439 | /* Get count number of bytes from I²C-device at address adr, store them in buf. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 440 | * Start & stop handshaking is done by this routine, ack will be sent after the |
Richard Knutsson | e8be02a | 2007-02-06 21:52:04 -0300 | [diff] [blame] | 441 | * last byte to inhibit further sending of data. If uaccess is 'true', data is |
Marcin Garski | db95517 | 2007-10-19 23:22:11 +0200 | [diff] [blame] | 442 | * written to user-space with put_user. Returns -1 if I²C-device didn't send |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 443 | * acknowledge, 0 otherwise |
| 444 | */ |
| 445 | static int i2c_getdata(struct saa5246a_device *t, int count, u8 *buf) |
| 446 | { |
Hans Verkuil | 1b8dac1 | 2009-02-07 11:18:05 -0300 | [diff] [blame] | 447 | struct i2c_client *client = v4l2_get_subdevdata(&t->sd); |
| 448 | |
| 449 | if (i2c_master_recv(client, buf, count) != count) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 450 | return -1; |
| 451 | return 0; |
| 452 | } |
| 453 | |
| 454 | /* When a page is found then the not FOUND bit in one of the status registers |
| 455 | * of the SAA5264A chip is cleared. Unfortunately this bit is not set |
| 456 | * automatically when a new page is requested. Instead this function must be |
| 457 | * called after a page has been requested. |
| 458 | * |
| 459 | * Return value: 0 if successful |
| 460 | */ |
| 461 | static int saa5246a_clear_found_bit(struct saa5246a_device *t, |
| 462 | unsigned char dau_no) |
| 463 | { |
| 464 | unsigned char row_25_column_8; |
| 465 | |
| 466 | if (i2c_senddata(t, SAA5246A_REGISTER_R8, |
| 467 | |
| 468 | dau_no | |
| 469 | R8_DO_NOT_CLEAR_MEMORY, |
| 470 | |
| 471 | R9_CURSER_ROW_25, |
| 472 | |
| 473 | R10_CURSER_COLUMN_8, |
| 474 | |
| 475 | COMMAND_END) || |
| 476 | i2c_getdata(t, 1, &row_25_column_8)) |
| 477 | { |
| 478 | return -EIO; |
| 479 | } |
| 480 | row_25_column_8 |= ROW25_COLUMN8_PAGE_NOT_FOUND; |
| 481 | if (i2c_senddata(t, SAA5246A_REGISTER_R8, |
| 482 | |
| 483 | dau_no | |
| 484 | R8_DO_NOT_CLEAR_MEMORY, |
| 485 | |
| 486 | R9_CURSER_ROW_25, |
| 487 | |
| 488 | R10_CURSER_COLUMN_8, |
| 489 | |
| 490 | row_25_column_8, |
| 491 | |
| 492 | COMMAND_END)) |
| 493 | { |
| 494 | return -EIO; |
| 495 | } |
| 496 | |
| 497 | return 0; |
| 498 | } |
| 499 | |
| 500 | /* Requests one videotext page as described in req. The fields of req are |
| 501 | * checked and an error is returned if something is invalid. |
| 502 | * |
| 503 | * Return value: 0 if successful |
| 504 | */ |
| 505 | static int saa5246a_request_page(struct saa5246a_device *t, |
| 506 | vtx_pagereq_t *req) |
| 507 | { |
| 508 | if (req->pagemask < 0 || req->pagemask >= PGMASK_MAX) |
| 509 | return -EINVAL; |
| 510 | if (req->pagemask & PGMASK_PAGE) |
| 511 | if (req->page < 0 || req->page > PAGE_MAX) |
| 512 | return -EINVAL; |
| 513 | if (req->pagemask & PGMASK_HOUR) |
| 514 | if (req->hour < 0 || req->hour > HOUR_MAX) |
| 515 | return -EINVAL; |
| 516 | if (req->pagemask & PGMASK_MINUTE) |
| 517 | if (req->minute < 0 || req->minute > MINUTE_MAX) |
| 518 | return -EINVAL; |
| 519 | if (req->pgbuf < 0 || req->pgbuf >= NUM_DAUS) |
| 520 | return -EINVAL; |
| 521 | |
| 522 | if (i2c_senddata(t, SAA5246A_REGISTER_R2, |
| 523 | |
| 524 | R2_IN_R3_SELECT_PAGE_HUNDREDS | |
| 525 | req->pgbuf << 4 | |
| 526 | R2_BANK_0 | |
| 527 | R2_HAMMING_CHECK_OFF, |
| 528 | |
| 529 | HUNDREDS_OF_PAGE(req->page) | |
| 530 | R3_HOLD_PAGE | |
| 531 | (req->pagemask & PG_HUND ? |
| 532 | R3_PAGE_HUNDREDS_DO_CARE : |
| 533 | R3_PAGE_HUNDREDS_DO_NOT_CARE), |
| 534 | |
| 535 | TENS_OF_PAGE(req->page) | |
| 536 | (req->pagemask & PG_TEN ? |
| 537 | R3_PAGE_TENS_DO_CARE : |
| 538 | R3_PAGE_TENS_DO_NOT_CARE), |
| 539 | |
| 540 | UNITS_OF_PAGE(req->page) | |
| 541 | (req->pagemask & PG_UNIT ? |
| 542 | R3_PAGE_UNITS_DO_CARE : |
| 543 | R3_PAGE_UNITS_DO_NOT_CARE), |
| 544 | |
| 545 | TENS_OF_HOUR(req->hour) | |
| 546 | (req->pagemask & HR_TEN ? |
| 547 | R3_HOURS_TENS_DO_CARE : |
| 548 | R3_HOURS_TENS_DO_NOT_CARE), |
| 549 | |
| 550 | UNITS_OF_HOUR(req->hour) | |
| 551 | (req->pagemask & HR_UNIT ? |
| 552 | R3_HOURS_UNITS_DO_CARE : |
| 553 | R3_HOURS_UNITS_DO_NOT_CARE), |
| 554 | |
| 555 | TENS_OF_MINUTE(req->minute) | |
| 556 | (req->pagemask & MIN_TEN ? |
| 557 | R3_MINUTES_TENS_DO_CARE : |
| 558 | R3_MINUTES_TENS_DO_NOT_CARE), |
| 559 | |
| 560 | UNITS_OF_MINUTE(req->minute) | |
| 561 | (req->pagemask & MIN_UNIT ? |
| 562 | R3_MINUTES_UNITS_DO_CARE : |
| 563 | R3_MINUTES_UNITS_DO_NOT_CARE), |
| 564 | |
| 565 | COMMAND_END) || i2c_senddata(t, SAA5246A_REGISTER_R2, |
| 566 | |
| 567 | R2_IN_R3_SELECT_PAGE_HUNDREDS | |
| 568 | req->pgbuf << 4 | |
| 569 | R2_BANK_0 | |
| 570 | R2_HAMMING_CHECK_OFF, |
| 571 | |
| 572 | HUNDREDS_OF_PAGE(req->page) | |
| 573 | R3_UPDATE_PAGE | |
| 574 | (req->pagemask & PG_HUND ? |
| 575 | R3_PAGE_HUNDREDS_DO_CARE : |
| 576 | R3_PAGE_HUNDREDS_DO_NOT_CARE), |
| 577 | |
| 578 | COMMAND_END)) |
| 579 | { |
| 580 | return -EIO; |
| 581 | } |
| 582 | |
Richard Knutsson | e8be02a | 2007-02-06 21:52:04 -0300 | [diff] [blame] | 583 | t->is_searching[req->pgbuf] = true; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 584 | return 0; |
| 585 | } |
| 586 | |
| 587 | /* This routine decodes the page number from the infobits contained in line 25. |
| 588 | * |
| 589 | * Parameters: |
| 590 | * infobits: must be bits 0 to 9 of column 25 |
| 591 | * |
| 592 | * Return value: page number coded in hexadecimal, i. e. page 123 is coded 0x123 |
| 593 | */ |
| 594 | static inline int saa5246a_extract_pagenum_from_infobits( |
| 595 | unsigned char infobits[10]) |
| 596 | { |
| 597 | int page_hundreds, page_tens, page_units; |
| 598 | |
| 599 | page_units = infobits[0] & ROW25_COLUMN0_PAGE_UNITS; |
| 600 | page_tens = infobits[1] & ROW25_COLUMN1_PAGE_TENS; |
| 601 | page_hundreds = infobits[8] & ROW25_COLUMN8_PAGE_HUNDREDS; |
| 602 | |
| 603 | /* page 0x.. means page 8.. */ |
| 604 | if (page_hundreds == 0) |
| 605 | page_hundreds = 8; |
| 606 | |
| 607 | return((page_hundreds << 8) | (page_tens << 4) | page_units); |
| 608 | } |
| 609 | |
| 610 | /* Decodes the hour from the infobits contained in line 25. |
| 611 | * |
| 612 | * Parameters: |
| 613 | * infobits: must be bits 0 to 9 of column 25 |
| 614 | * |
| 615 | * Return: hour coded in hexadecimal, i. e. 12h is coded 0x12 |
| 616 | */ |
| 617 | static inline int saa5246a_extract_hour_from_infobits( |
| 618 | unsigned char infobits[10]) |
| 619 | { |
| 620 | int hour_tens, hour_units; |
| 621 | |
| 622 | hour_units = infobits[4] & ROW25_COLUMN4_HOUR_UNITS; |
| 623 | hour_tens = infobits[5] & ROW25_COLUMN5_HOUR_TENS; |
| 624 | |
| 625 | return((hour_tens << 4) | hour_units); |
| 626 | } |
| 627 | |
| 628 | /* Decodes the minutes from the infobits contained in line 25. |
| 629 | * |
| 630 | * Parameters: |
| 631 | * infobits: must be bits 0 to 9 of column 25 |
| 632 | * |
| 633 | * Return: minutes coded in hexadecimal, i. e. 10min is coded 0x10 |
| 634 | */ |
| 635 | static inline int saa5246a_extract_minutes_from_infobits( |
| 636 | unsigned char infobits[10]) |
| 637 | { |
| 638 | int minutes_tens, minutes_units; |
| 639 | |
| 640 | minutes_units = infobits[2] & ROW25_COLUMN2_MINUTES_UNITS; |
| 641 | minutes_tens = infobits[3] & ROW25_COLUMN3_MINUTES_TENS; |
| 642 | |
| 643 | return((minutes_tens << 4) | minutes_units); |
| 644 | } |
| 645 | |
| 646 | /* Reads the status bits contained in the first 10 columns of the first line |
| 647 | * and extracts the information into info. |
| 648 | * |
| 649 | * Return value: 0 if successful |
| 650 | */ |
| 651 | static inline int saa5246a_get_status(struct saa5246a_device *t, |
| 652 | vtx_pageinfo_t *info, unsigned char dau_no) |
| 653 | { |
| 654 | unsigned char infobits[10]; |
| 655 | int column; |
| 656 | |
| 657 | if (dau_no >= NUM_DAUS) |
| 658 | return -EINVAL; |
| 659 | |
| 660 | if (i2c_senddata(t, SAA5246A_REGISTER_R8, |
| 661 | |
| 662 | dau_no | |
| 663 | R8_DO_NOT_CLEAR_MEMORY, |
| 664 | |
| 665 | R9_CURSER_ROW_25, |
| 666 | |
| 667 | R10_CURSER_COLUMN_0, |
| 668 | |
| 669 | COMMAND_END) || |
| 670 | i2c_getdata(t, 10, infobits)) |
| 671 | { |
| 672 | return -EIO; |
| 673 | } |
| 674 | |
| 675 | info->pagenum = saa5246a_extract_pagenum_from_infobits(infobits); |
| 676 | info->hour = saa5246a_extract_hour_from_infobits(infobits); |
| 677 | info->minute = saa5246a_extract_minutes_from_infobits(infobits); |
| 678 | info->charset = ((infobits[7] & ROW25_COLUMN7_CHARACTER_SET) >> 1); |
| 679 | info->delete = !!(infobits[3] & ROW25_COLUMN3_DELETE_PAGE); |
| 680 | info->headline = !!(infobits[5] & ROW25_COLUMN5_INSERT_HEADLINE); |
| 681 | info->subtitle = !!(infobits[5] & ROW25_COLUMN5_INSERT_SUBTITLE); |
| 682 | info->supp_header = !!(infobits[6] & ROW25_COLUMN6_SUPPRESS_HEADER); |
| 683 | info->update = !!(infobits[6] & ROW25_COLUMN6_UPDATE_PAGE); |
| 684 | info->inter_seq = !!(infobits[6] & ROW25_COLUMN6_INTERRUPTED_SEQUENCE); |
| 685 | info->dis_disp = !!(infobits[6] & ROW25_COLUMN6_SUPPRESS_DISPLAY); |
| 686 | info->serial = !!(infobits[7] & ROW25_COLUMN7_SERIAL_MODE); |
| 687 | info->notfound = !!(infobits[8] & ROW25_COLUMN8_PAGE_NOT_FOUND); |
| 688 | info->pblf = !!(infobits[9] & ROW25_COLUMN9_PAGE_BEING_LOOKED_FOR); |
| 689 | info->hamming = 0; |
| 690 | for (column = 0; column <= 7; column++) { |
| 691 | if (infobits[column] & ROW25_COLUMN0_TO_7_HAMMING_ERROR) { |
| 692 | info->hamming = 1; |
| 693 | break; |
| 694 | } |
| 695 | } |
| 696 | if (!info->hamming && !info->notfound) |
Richard Knutsson | e8be02a | 2007-02-06 21:52:04 -0300 | [diff] [blame] | 697 | t->is_searching[dau_no] = false; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 698 | return 0; |
| 699 | } |
| 700 | |
| 701 | /* Reads 1 videotext page buffer of the SAA5246A. |
| 702 | * |
| 703 | * req is used both as input and as output. It contains information which part |
| 704 | * must be read. The videotext page is copied into req->buffer. |
| 705 | * |
| 706 | * Return value: 0 if successful |
| 707 | */ |
| 708 | static inline int saa5246a_get_page(struct saa5246a_device *t, |
| 709 | vtx_pagereq_t *req) |
| 710 | { |
| 711 | int start, end, size; |
| 712 | char *buf; |
| 713 | int err; |
| 714 | |
| 715 | if (req->pgbuf < 0 || req->pgbuf >= NUM_DAUS || |
| 716 | req->start < 0 || req->start > req->end || req->end >= VTX_PAGESIZE) |
| 717 | return -EINVAL; |
| 718 | |
| 719 | buf = kmalloc(VTX_PAGESIZE, GFP_KERNEL); |
| 720 | if (!buf) |
| 721 | return -ENOMEM; |
| 722 | |
| 723 | /* Read "normal" part of page */ |
| 724 | err = -EIO; |
| 725 | |
| 726 | end = min(req->end, VTX_PAGESIZE - 1); |
| 727 | if (i2c_senddata(t, SAA5246A_REGISTER_R8, |
| 728 | req->pgbuf | R8_DO_NOT_CLEAR_MEMORY, |
| 729 | ROW(req->start), COLUMN(req->start), COMMAND_END)) |
| 730 | goto out; |
| 731 | if (i2c_getdata(t, end - req->start + 1, buf)) |
| 732 | goto out; |
| 733 | err = -EFAULT; |
| 734 | if (copy_to_user(req->buffer, buf, end - req->start + 1)) |
| 735 | goto out; |
| 736 | |
| 737 | /* Always get the time from buffer 4, since this stupid SAA5246A only |
| 738 | * updates the currently displayed buffer... |
| 739 | */ |
| 740 | if (REQ_CONTAINS_TIME(req)) { |
| 741 | start = max(req->start, POS_TIME_START); |
| 742 | end = min(req->end, POS_TIME_END); |
| 743 | size = end - start + 1; |
| 744 | err = -EINVAL; |
| 745 | if (size < 0) |
| 746 | goto out; |
| 747 | err = -EIO; |
| 748 | if (i2c_senddata(t, SAA5246A_REGISTER_R8, |
| 749 | R8_ACTIVE_CHAPTER_4 | R8_DO_NOT_CLEAR_MEMORY, |
| 750 | R9_CURSER_ROW_0, start, COMMAND_END)) |
| 751 | goto out; |
| 752 | if (i2c_getdata(t, size, buf)) |
| 753 | goto out; |
| 754 | err = -EFAULT; |
| 755 | if (copy_to_user(req->buffer + start - req->start, buf, size)) |
| 756 | goto out; |
| 757 | } |
| 758 | /* Insert the header from buffer 4 only, if acquisition circuit is still searching for a page */ |
| 759 | if (REQ_CONTAINS_HEADER(req) && t->is_searching[req->pgbuf]) { |
| 760 | start = max(req->start, POS_HEADER_START); |
| 761 | end = min(req->end, POS_HEADER_END); |
| 762 | size = end - start + 1; |
| 763 | err = -EINVAL; |
| 764 | if (size < 0) |
| 765 | goto out; |
| 766 | err = -EIO; |
| 767 | if (i2c_senddata(t, SAA5246A_REGISTER_R8, |
| 768 | R8_ACTIVE_CHAPTER_4 | R8_DO_NOT_CLEAR_MEMORY, |
| 769 | R9_CURSER_ROW_0, start, COMMAND_END)) |
| 770 | goto out; |
| 771 | if (i2c_getdata(t, end - start + 1, buf)) |
| 772 | goto out; |
| 773 | err = -EFAULT; |
| 774 | if (copy_to_user(req->buffer + start - req->start, buf, size)) |
| 775 | goto out; |
| 776 | } |
| 777 | err = 0; |
| 778 | out: |
| 779 | kfree(buf); |
| 780 | return err; |
| 781 | } |
| 782 | |
| 783 | /* Stops the acquisition circuit given in dau_no. The page buffer associated |
| 784 | * with this acquisition circuit will no more be updated. The other daus are |
| 785 | * not affected. |
| 786 | * |
| 787 | * Return value: 0 if successful |
| 788 | */ |
| 789 | static inline int saa5246a_stop_dau(struct saa5246a_device *t, |
| 790 | unsigned char dau_no) |
| 791 | { |
| 792 | if (dau_no >= NUM_DAUS) |
| 793 | return -EINVAL; |
| 794 | if (i2c_senddata(t, SAA5246A_REGISTER_R2, |
| 795 | |
| 796 | R2_IN_R3_SELECT_PAGE_HUNDREDS | |
| 797 | dau_no << 4 | |
| 798 | R2_BANK_0 | |
| 799 | R2_HAMMING_CHECK_OFF, |
| 800 | |
| 801 | R3_PAGE_HUNDREDS_0 | |
| 802 | R3_HOLD_PAGE | |
| 803 | R3_PAGE_HUNDREDS_DO_NOT_CARE, |
| 804 | |
| 805 | COMMAND_END)) |
| 806 | { |
| 807 | return -EIO; |
| 808 | } |
Richard Knutsson | e8be02a | 2007-02-06 21:52:04 -0300 | [diff] [blame] | 809 | t->is_searching[dau_no] = false; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 810 | return 0; |
| 811 | } |
| 812 | |
| 813 | /* Handles ioctls defined in videotext.h |
| 814 | * |
| 815 | * Returns 0 if successful |
| 816 | */ |
Hans Verkuil | 069b747 | 2008-12-30 07:04:34 -0300 | [diff] [blame] | 817 | static long do_saa5246a_ioctl(struct file *file, unsigned int cmd, void *arg) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 818 | { |
Hans Verkuil | c170ecf | 2008-08-23 08:32:09 -0300 | [diff] [blame] | 819 | struct saa5246a_device *t = video_drvdata(file); |
Hans Verkuil | 601e944 | 2008-08-23 07:24:07 -0300 | [diff] [blame] | 820 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 821 | switch(cmd) |
| 822 | { |
| 823 | case VTXIOCGETINFO: |
| 824 | { |
| 825 | vtx_info_t *info = arg; |
| 826 | |
| 827 | info->version_major = MAJOR_VERSION; |
| 828 | info->version_minor = MINOR_VERSION; |
| 829 | info->numpages = NUM_DAUS; |
| 830 | return 0; |
| 831 | } |
| 832 | |
| 833 | case VTXIOCCLRPAGE: |
| 834 | { |
| 835 | vtx_pagereq_t *req = arg; |
| 836 | |
| 837 | if (req->pgbuf < 0 || req->pgbuf >= NUM_DAUS) |
| 838 | return -EINVAL; |
| 839 | memset(t->pgbuf[req->pgbuf], ' ', sizeof(t->pgbuf[0])); |
| 840 | return 0; |
| 841 | } |
| 842 | |
| 843 | case VTXIOCCLRFOUND: |
| 844 | { |
| 845 | vtx_pagereq_t *req = arg; |
| 846 | |
| 847 | if (req->pgbuf < 0 || req->pgbuf >= NUM_DAUS) |
| 848 | return -EINVAL; |
| 849 | return(saa5246a_clear_found_bit(t, req->pgbuf)); |
| 850 | } |
| 851 | |
| 852 | case VTXIOCPAGEREQ: |
| 853 | { |
| 854 | vtx_pagereq_t *req = arg; |
| 855 | |
| 856 | return(saa5246a_request_page(t, req)); |
| 857 | } |
| 858 | |
| 859 | case VTXIOCGETSTAT: |
| 860 | { |
| 861 | vtx_pagereq_t *req = arg; |
| 862 | vtx_pageinfo_t info; |
| 863 | int rval; |
| 864 | |
| 865 | if ((rval = saa5246a_get_status(t, &info, req->pgbuf))) |
| 866 | return rval; |
| 867 | if(copy_to_user(req->buffer, &info, |
| 868 | sizeof(vtx_pageinfo_t))) |
| 869 | return -EFAULT; |
| 870 | return 0; |
| 871 | } |
| 872 | |
| 873 | case VTXIOCGETPAGE: |
| 874 | { |
| 875 | vtx_pagereq_t *req = arg; |
| 876 | |
| 877 | return(saa5246a_get_page(t, req)); |
| 878 | } |
| 879 | |
| 880 | case VTXIOCSTOPDAU: |
| 881 | { |
| 882 | vtx_pagereq_t *req = arg; |
| 883 | |
| 884 | return(saa5246a_stop_dau(t, req->pgbuf)); |
| 885 | } |
| 886 | |
| 887 | case VTXIOCPUTPAGE: |
| 888 | case VTXIOCSETDISP: |
| 889 | case VTXIOCPUTSTAT: |
| 890 | return 0; |
| 891 | |
| 892 | case VTXIOCCLRCACHE: |
| 893 | { |
| 894 | return 0; |
| 895 | } |
| 896 | |
| 897 | case VTXIOCSETVIRT: |
| 898 | { |
| 899 | /* I do not know what "virtual mode" means */ |
| 900 | return 0; |
| 901 | } |
| 902 | } |
| 903 | return -EINVAL; |
| 904 | } |
| 905 | |
| 906 | /* |
| 907 | * Translates old vtx IOCTLs to new ones |
| 908 | * |
| 909 | * This keeps new kernel versions compatible with old userspace programs. |
| 910 | */ |
| 911 | static inline unsigned int vtx_fix_command(unsigned int cmd) |
| 912 | { |
| 913 | switch (cmd) { |
| 914 | case VTXIOCGETINFO_OLD: |
| 915 | cmd = VTXIOCGETINFO; |
| 916 | break; |
| 917 | case VTXIOCCLRPAGE_OLD: |
| 918 | cmd = VTXIOCCLRPAGE; |
| 919 | break; |
| 920 | case VTXIOCCLRFOUND_OLD: |
| 921 | cmd = VTXIOCCLRFOUND; |
| 922 | break; |
| 923 | case VTXIOCPAGEREQ_OLD: |
| 924 | cmd = VTXIOCPAGEREQ; |
| 925 | break; |
| 926 | case VTXIOCGETSTAT_OLD: |
| 927 | cmd = VTXIOCGETSTAT; |
| 928 | break; |
| 929 | case VTXIOCGETPAGE_OLD: |
| 930 | cmd = VTXIOCGETPAGE; |
| 931 | break; |
| 932 | case VTXIOCSTOPDAU_OLD: |
| 933 | cmd = VTXIOCSTOPDAU; |
| 934 | break; |
| 935 | case VTXIOCPUTPAGE_OLD: |
| 936 | cmd = VTXIOCPUTPAGE; |
| 937 | break; |
| 938 | case VTXIOCSETDISP_OLD: |
| 939 | cmd = VTXIOCSETDISP; |
| 940 | break; |
| 941 | case VTXIOCPUTSTAT_OLD: |
| 942 | cmd = VTXIOCPUTSTAT; |
| 943 | break; |
| 944 | case VTXIOCCLRCACHE_OLD: |
| 945 | cmd = VTXIOCCLRCACHE; |
| 946 | break; |
| 947 | case VTXIOCSETVIRT_OLD: |
| 948 | cmd = VTXIOCSETVIRT; |
| 949 | break; |
| 950 | } |
| 951 | return cmd; |
| 952 | } |
| 953 | |
| 954 | /* |
| 955 | * Handle the locking |
| 956 | */ |
Hans Verkuil | 069b747 | 2008-12-30 07:04:34 -0300 | [diff] [blame] | 957 | static long saa5246a_ioctl(struct file *file, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 958 | unsigned int cmd, unsigned long arg) |
| 959 | { |
Hans Verkuil | c170ecf | 2008-08-23 08:32:09 -0300 | [diff] [blame] | 960 | struct saa5246a_device *t = video_drvdata(file); |
Hans Verkuil | 069b747 | 2008-12-30 07:04:34 -0300 | [diff] [blame] | 961 | long err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 962 | |
| 963 | cmd = vtx_fix_command(cmd); |
Ingo Molnar | 3593cab | 2006-02-07 06:49:14 -0200 | [diff] [blame] | 964 | mutex_lock(&t->lock); |
Hans Verkuil | f473bf7 | 2008-11-01 08:25:11 -0300 | [diff] [blame] | 965 | err = video_usercopy(file, cmd, arg, do_saa5246a_ioctl); |
Ingo Molnar | 3593cab | 2006-02-07 06:49:14 -0200 | [diff] [blame] | 966 | mutex_unlock(&t->lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 967 | return err; |
| 968 | } |
| 969 | |
Hans Verkuil | bec4366 | 2008-12-30 06:58:20 -0300 | [diff] [blame] | 970 | static int saa5246a_open(struct file *file) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 971 | { |
Hans Verkuil | c170ecf | 2008-08-23 08:32:09 -0300 | [diff] [blame] | 972 | struct saa5246a_device *t = video_drvdata(file); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 973 | |
Hans Verkuil | 7d43cd5 | 2008-08-23 05:31:47 -0300 | [diff] [blame] | 974 | if (test_and_set_bit(0, &t->in_use)) |
| 975 | return -EBUSY; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 976 | |
| 977 | if (i2c_senddata(t, SAA5246A_REGISTER_R0, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 978 | R0_SELECT_R11 | |
| 979 | R0_PLL_TIME_CONSTANT_LONG | |
| 980 | R0_ENABLE_nODD_EVEN_OUTPUT | |
| 981 | R0_ENABLE_HDR_POLL | |
| 982 | R0_DO_NOT_FORCE_nODD_EVEN_LOW_IF_PICTURE_DISPLAYED | |
| 983 | R0_NO_FREE_RUN_PLL | |
| 984 | R0_NO_AUTOMATIC_FASTEXT_PROMPT, |
| 985 | |
| 986 | R1_NON_INTERLACED_312_312_LINES | |
| 987 | R1_DEW | |
| 988 | R1_EXTENDED_PACKET_DISABLE | |
| 989 | R1_DAUS_ALL_ON | |
| 990 | R1_8_BITS_NO_PARITY | |
| 991 | R1_VCS_TO_SCS, |
| 992 | |
| 993 | COMMAND_END) || |
| 994 | i2c_senddata(t, SAA5246A_REGISTER_R4, |
| 995 | |
| 996 | /* We do not care much for the TV display but nevertheless we |
| 997 | * need the currently displayed page later because only on that |
| 998 | * page the time is updated. */ |
| 999 | R4_DISPLAY_PAGE_4, |
| 1000 | |
| 1001 | COMMAND_END)) |
| 1002 | { |
Hans Verkuil | 7d43cd5 | 2008-08-23 05:31:47 -0300 | [diff] [blame] | 1003 | clear_bit(0, &t->in_use); |
| 1004 | return -EIO; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1005 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1006 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1007 | } |
| 1008 | |
Hans Verkuil | bec4366 | 2008-12-30 06:58:20 -0300 | [diff] [blame] | 1009 | static int saa5246a_release(struct file *file) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1010 | { |
Hans Verkuil | c170ecf | 2008-08-23 08:32:09 -0300 | [diff] [blame] | 1011 | struct saa5246a_device *t = video_drvdata(file); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1012 | |
| 1013 | /* Stop all acquisition circuits. */ |
| 1014 | i2c_senddata(t, SAA5246A_REGISTER_R1, |
| 1015 | |
| 1016 | R1_INTERLACED_312_AND_HALF_312_AND_HALF_LINES | |
| 1017 | R1_DEW | |
| 1018 | R1_EXTENDED_PACKET_DISABLE | |
| 1019 | R1_DAUS_ALL_OFF | |
| 1020 | R1_8_BITS_NO_PARITY | |
| 1021 | R1_VCS_TO_SCS, |
| 1022 | |
| 1023 | COMMAND_END); |
Hans Verkuil | 7d43cd5 | 2008-08-23 05:31:47 -0300 | [diff] [blame] | 1024 | clear_bit(0, &t->in_use); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1025 | return 0; |
| 1026 | } |
| 1027 | |
Hans Verkuil | bec4366 | 2008-12-30 06:58:20 -0300 | [diff] [blame] | 1028 | static const struct v4l2_file_operations saa_fops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1029 | .owner = THIS_MODULE, |
| 1030 | .open = saa5246a_open, |
| 1031 | .release = saa5246a_release, |
| 1032 | .ioctl = saa5246a_ioctl, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1033 | }; |
| 1034 | |
| 1035 | static struct video_device saa_template = |
| 1036 | { |
Hans Verkuil | 71ef85c | 2008-09-07 08:31:13 -0300 | [diff] [blame] | 1037 | .name = "saa5246a", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1038 | .fops = &saa_fops, |
| 1039 | .release = video_device_release, |
| 1040 | .minor = -1, |
| 1041 | }; |
Hans Verkuil | 71ef85c | 2008-09-07 08:31:13 -0300 | [diff] [blame] | 1042 | |
Hans Verkuil | 1b8dac1 | 2009-02-07 11:18:05 -0300 | [diff] [blame] | 1043 | static int saa5246a_g_chip_ident(struct v4l2_subdev *sd, struct v4l2_dbg_chip_ident *chip) |
| 1044 | { |
| 1045 | struct i2c_client *client = v4l2_get_subdevdata(sd); |
Hans Verkuil | 71ef85c | 2008-09-07 08:31:13 -0300 | [diff] [blame] | 1046 | |
Hans Verkuil | 1b8dac1 | 2009-02-07 11:18:05 -0300 | [diff] [blame] | 1047 | return v4l2_chip_ident_i2c_client(client, chip, V4L2_IDENT_SAA5246A, 0); |
| 1048 | } |
| 1049 | |
| 1050 | static const struct v4l2_subdev_core_ops saa5246a_core_ops = { |
| 1051 | .g_chip_ident = saa5246a_g_chip_ident, |
| 1052 | }; |
| 1053 | |
| 1054 | static const struct v4l2_subdev_ops saa5246a_ops = { |
| 1055 | .core = &saa5246a_core_ops, |
| 1056 | }; |
| 1057 | |
Hans Verkuil | 71ef85c | 2008-09-07 08:31:13 -0300 | [diff] [blame] | 1058 | |
| 1059 | static int saa5246a_probe(struct i2c_client *client, |
| 1060 | const struct i2c_device_id *id) |
| 1061 | { |
| 1062 | int pgbuf; |
| 1063 | int err; |
Hans Verkuil | 71ef85c | 2008-09-07 08:31:13 -0300 | [diff] [blame] | 1064 | struct saa5246a_device *t; |
Hans Verkuil | 1b8dac1 | 2009-02-07 11:18:05 -0300 | [diff] [blame] | 1065 | struct v4l2_subdev *sd; |
Hans Verkuil | 71ef85c | 2008-09-07 08:31:13 -0300 | [diff] [blame] | 1066 | |
| 1067 | v4l_info(client, "chip found @ 0x%x (%s)\n", |
| 1068 | client->addr << 1, client->adapter->name); |
| 1069 | v4l_info(client, "VideoText version %d.%d\n", |
| 1070 | MAJOR_VERSION, MINOR_VERSION); |
| 1071 | t = kzalloc(sizeof(*t), GFP_KERNEL); |
| 1072 | if (t == NULL) |
| 1073 | return -ENOMEM; |
Hans Verkuil | 1b8dac1 | 2009-02-07 11:18:05 -0300 | [diff] [blame] | 1074 | sd = &t->sd; |
| 1075 | v4l2_i2c_subdev_init(sd, client, &saa5246a_ops); |
Hans Verkuil | 71ef85c | 2008-09-07 08:31:13 -0300 | [diff] [blame] | 1076 | mutex_init(&t->lock); |
| 1077 | |
| 1078 | /* Now create a video4linux device */ |
Hans Verkuil | 1b8dac1 | 2009-02-07 11:18:05 -0300 | [diff] [blame] | 1079 | t->vdev = video_device_alloc(); |
| 1080 | if (t->vdev == NULL) { |
Hans Verkuil | 71ef85c | 2008-09-07 08:31:13 -0300 | [diff] [blame] | 1081 | kfree(t); |
| 1082 | return -ENOMEM; |
| 1083 | } |
Hans Verkuil | 1b8dac1 | 2009-02-07 11:18:05 -0300 | [diff] [blame] | 1084 | memcpy(t->vdev, &saa_template, sizeof(*t->vdev)); |
Hans Verkuil | 71ef85c | 2008-09-07 08:31:13 -0300 | [diff] [blame] | 1085 | |
| 1086 | for (pgbuf = 0; pgbuf < NUM_DAUS; pgbuf++) { |
| 1087 | memset(t->pgbuf[pgbuf], ' ', sizeof(t->pgbuf[0])); |
| 1088 | t->is_searching[pgbuf] = false; |
| 1089 | } |
Hans Verkuil | 1b8dac1 | 2009-02-07 11:18:05 -0300 | [diff] [blame] | 1090 | video_set_drvdata(t->vdev, t); |
Hans Verkuil | 71ef85c | 2008-09-07 08:31:13 -0300 | [diff] [blame] | 1091 | |
| 1092 | /* Register it */ |
Hans Verkuil | 1b8dac1 | 2009-02-07 11:18:05 -0300 | [diff] [blame] | 1093 | err = video_register_device(t->vdev, VFL_TYPE_VTX, -1); |
Hans Verkuil | 71ef85c | 2008-09-07 08:31:13 -0300 | [diff] [blame] | 1094 | if (err < 0) { |
Hans Verkuil | 1b8dac1 | 2009-02-07 11:18:05 -0300 | [diff] [blame] | 1095 | video_device_release(t->vdev); |
Dan Carpenter | 9401608 | 2009-04-14 19:51:30 -0300 | [diff] [blame] | 1096 | kfree(t); |
Hans Verkuil | 71ef85c | 2008-09-07 08:31:13 -0300 | [diff] [blame] | 1097 | return err; |
| 1098 | } |
Hans Verkuil | 71ef85c | 2008-09-07 08:31:13 -0300 | [diff] [blame] | 1099 | return 0; |
| 1100 | } |
| 1101 | |
| 1102 | static int saa5246a_remove(struct i2c_client *client) |
| 1103 | { |
Hans Verkuil | 1b8dac1 | 2009-02-07 11:18:05 -0300 | [diff] [blame] | 1104 | struct v4l2_subdev *sd = i2c_get_clientdata(client); |
| 1105 | struct saa5246a_device *t = to_dev(sd); |
Hans Verkuil | 71ef85c | 2008-09-07 08:31:13 -0300 | [diff] [blame] | 1106 | |
Hans Verkuil | 1b8dac1 | 2009-02-07 11:18:05 -0300 | [diff] [blame] | 1107 | video_unregister_device(t->vdev); |
| 1108 | v4l2_device_unregister_subdev(sd); |
| 1109 | kfree(t); |
Hans Verkuil | 71ef85c | 2008-09-07 08:31:13 -0300 | [diff] [blame] | 1110 | return 0; |
| 1111 | } |
| 1112 | |
| 1113 | static const struct i2c_device_id saa5246a_id[] = { |
| 1114 | { "saa5246a", 0 }, |
| 1115 | { } |
| 1116 | }; |
| 1117 | MODULE_DEVICE_TABLE(i2c, saa5246a_id); |
| 1118 | |
| 1119 | static struct v4l2_i2c_driver_data v4l2_i2c_data = { |
| 1120 | .name = "saa5246a", |
Hans Verkuil | 71ef85c | 2008-09-07 08:31:13 -0300 | [diff] [blame] | 1121 | .probe = saa5246a_probe, |
| 1122 | .remove = saa5246a_remove, |
| 1123 | .id_table = saa5246a_id, |
| 1124 | }; |