360 lines
12 KiB
C
360 lines
12 KiB
C
/*
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Driver for the SAA5246A or SAA5281 Teletext (=Videotext) decoder chips from
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Philips.
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Copyright (C) 2004 Michael Geng (linux@MichaelGeng.de)
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#ifndef __SAA5246A_H__
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#define __SAA5246A_H__
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#define MAJOR_VERSION 1 /* driver major version number */
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#define MINOR_VERSION 8 /* driver minor version number */
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#define IF_NAME "SAA5246A"
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#define I2C_ADDRESS 17
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/* Number of DAUs = number of pages that can be searched at the same time. */
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#define NUM_DAUS 4
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#define NUM_ROWS_PER_PAGE 40
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/* first column is 0 (not 1) */
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#define POS_TIME_START 32
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#define POS_TIME_END 39
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#define POS_HEADER_START 7
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#define POS_HEADER_END 31
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/* Returns 'true' if the part of the videotext page described with req contains
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(at least parts of) the time field */
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#define REQ_CONTAINS_TIME(p_req) \
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((p_req)->start <= POS_TIME_END && \
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(p_req)->end >= POS_TIME_START)
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/* Returns 'true' if the part of the videotext page described with req contains
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(at least parts of) the page header */
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#define REQ_CONTAINS_HEADER(p_req) \
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((p_req)->start <= POS_HEADER_END && \
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(p_req)->end >= POS_HEADER_START)
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/*****************************************************************************/
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/* Mode register numbers of the SAA5246A */
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/*****************************************************************************/
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#define SAA5246A_REGISTER_R0 0
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#define SAA5246A_REGISTER_R1 1
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#define SAA5246A_REGISTER_R2 2
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#define SAA5246A_REGISTER_R3 3
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#define SAA5246A_REGISTER_R4 4
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#define SAA5246A_REGISTER_R5 5
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#define SAA5246A_REGISTER_R6 6
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#define SAA5246A_REGISTER_R7 7
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#define SAA5246A_REGISTER_R8 8
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#define SAA5246A_REGISTER_R9 9
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#define SAA5246A_REGISTER_R10 10
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#define SAA5246A_REGISTER_R11 11
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#define SAA5246A_REGISTER_R11B 11
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/* SAA5246A mode registers often autoincrement to the next register.
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Therefore we use variable argument lists. The following macro indicates
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the end of a command list. */
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#define COMMAND_END (- 1)
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/*****************************************************************************/
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/* Contents of the mode registers of the SAA5246A */
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/*****************************************************************************/
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/* Register R0 (Advanced Control) */
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#define R0_SELECT_R11 0x00
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#define R0_SELECT_R11B 0x01
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#define R0_PLL_TIME_CONSTANT_LONG 0x00
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#define R0_PLL_TIME_CONSTANT_SHORT 0x02
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#define R0_ENABLE_nODD_EVEN_OUTPUT 0x00
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#define R0_DISABLE_nODD_EVEN_OUTPUT 0x04
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#define R0_ENABLE_HDR_POLL 0x00
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#define R0_DISABLE_HDR_POLL 0x10
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#define R0_DO_NOT_FORCE_nODD_EVEN_LOW_IF_PICTURE_DISPLAYED 0x00
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#define R0_FORCE_nODD_EVEN_LOW_IF_PICTURE_DISPLAYED 0x20
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#define R0_NO_FREE_RUN_PLL 0x00
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#define R0_FREE_RUN_PLL 0x40
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#define R0_NO_AUTOMATIC_FASTEXT_PROMPT 0x00
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#define R0_AUTOMATIC_FASTEXT_PROMPT 0x80
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/* Register R1 (Mode) */
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#define R1_INTERLACED_312_AND_HALF_312_AND_HALF_LINES 0x00
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#define R1_NON_INTERLACED_312_313_LINES 0x01
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#define R1_NON_INTERLACED_312_312_LINES 0x02
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#define R1_FFB_LEADING_EDGE_IN_FIRST_BROAD_PULSE 0x03
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#define R1_FFB_LEADING_EDGE_IN_SECOND_BROAD_PULSE 0x07
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#define R1_DEW 0x00
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#define R1_FULL_FIELD 0x08
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#define R1_EXTENDED_PACKET_DISABLE 0x00
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#define R1_EXTENDED_PACKET_ENABLE 0x10
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#define R1_DAUS_ALL_ON 0x00
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#define R1_DAUS_ALL_OFF 0x20
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#define R1_7_BITS_PLUS_PARITY 0x00
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#define R1_8_BITS_NO_PARITY 0x40
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#define R1_VCS_TO_SCS 0x00
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#define R1_NO_VCS_TO_SCS 0x80
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/* Register R2 (Page request address) */
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#define R2_IN_R3_SELECT_PAGE_HUNDREDS 0x00
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#define R2_IN_R3_SELECT_PAGE_TENS 0x01
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#define R2_IN_R3_SELECT_PAGE_UNITS 0x02
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#define R2_IN_R3_SELECT_HOURS_TENS 0x03
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#define R2_IN_R3_SELECT_HOURS_UNITS 0x04
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#define R2_IN_R3_SELECT_MINUTES_TENS 0x05
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#define R2_IN_R3_SELECT_MINUTES_UNITS 0x06
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#define R2_DAU_0 0x00
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#define R2_DAU_1 0x10
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#define R2_DAU_2 0x20
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#define R2_DAU_3 0x30
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#define R2_BANK_0 0x00
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#define R2_BANK 1 0x40
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#define R2_HAMMING_CHECK_ON 0x80
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#define R2_HAMMING_CHECK_OFF 0x00
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/* Register R3 (Page request data) */
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#define R3_PAGE_HUNDREDS_0 0x00
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#define R3_PAGE_HUNDREDS_1 0x01
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#define R3_PAGE_HUNDREDS_2 0x02
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#define R3_PAGE_HUNDREDS_3 0x03
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#define R3_PAGE_HUNDREDS_4 0x04
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#define R3_PAGE_HUNDREDS_5 0x05
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#define R3_PAGE_HUNDREDS_6 0x06
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#define R3_PAGE_HUNDREDS_7 0x07
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#define R3_HOLD_PAGE 0x00
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#define R3_UPDATE_PAGE 0x08
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#define R3_PAGE_HUNDREDS_DO_NOT_CARE 0x00
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#define R3_PAGE_HUNDREDS_DO_CARE 0x10
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#define R3_PAGE_TENS_DO_NOT_CARE 0x00
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#define R3_PAGE_TENS_DO_CARE 0x10
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#define R3_PAGE_UNITS_DO_NOT_CARE 0x00
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#define R3_PAGE_UNITS_DO_CARE 0x10
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#define R3_HOURS_TENS_DO_NOT_CARE 0x00
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#define R3_HOURS_TENS_DO_CARE 0x10
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#define R3_HOURS_UNITS_DO_NOT_CARE 0x00
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#define R3_HOURS_UNITS_DO_CARE 0x10
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#define R3_MINUTES_TENS_DO_NOT_CARE 0x00
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#define R3_MINUTES_TENS_DO_CARE 0x10
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#define R3_MINUTES_UNITS_DO_NOT_CARE 0x00
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#define R3_MINUTES_UNITS_DO_CARE 0x10
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/* Register R4 (Display chapter) */
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#define R4_DISPLAY_PAGE_0 0x00
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#define R4_DISPLAY_PAGE_1 0x01
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#define R4_DISPLAY_PAGE_2 0x02
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#define R4_DISPLAY_PAGE_3 0x03
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#define R4_DISPLAY_PAGE_4 0x04
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#define R4_DISPLAY_PAGE_5 0x05
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#define R4_DISPLAY_PAGE_6 0x06
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#define R4_DISPLAY_PAGE_7 0x07
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/* Register R5 (Normal display control) */
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#define R5_PICTURE_INSIDE_BOXING_OFF 0x00
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#define R5_PICTURE_INSIDE_BOXING_ON 0x01
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#define R5_PICTURE_OUTSIDE_BOXING_OFF 0x00
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#define R5_PICTURE_OUTSIDE_BOXING_ON 0x02
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#define R5_TEXT_INSIDE_BOXING_OFF 0x00
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#define R5_TEXT_INSIDE_BOXING_ON 0x04
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#define R5_TEXT_OUTSIDE_BOXING_OFF 0x00
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#define R5_TEXT_OUTSIDE_BOXING_ON 0x08
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#define R5_CONTRAST_REDUCTION_INSIDE_BOXING_OFF 0x00
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#define R5_CONTRAST_REDUCTION_INSIDE_BOXING_ON 0x10
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#define R5_CONTRAST_REDUCTION_OUTSIDE_BOXING_OFF 0x00
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#define R5_CONTRAST_REDUCTION_OUTSIDE_BOXING_ON 0x20
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#define R5_BACKGROUND_COLOR_INSIDE_BOXING_OFF 0x00
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#define R5_BACKGROUND_COLOR_INSIDE_BOXING_ON 0x40
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#define R5_BACKGROUND_COLOR_OUTSIDE_BOXING_OFF 0x00
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#define R5_BACKGROUND_COLOR_OUTSIDE_BOXING_ON 0x80
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/* Register R6 (Newsflash display) */
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#define R6_NEWSFLASH_PICTURE_INSIDE_BOXING_OFF 0x00
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#define R6_NEWSFLASH_PICTURE_INSIDE_BOXING_ON 0x01
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#define R6_NEWSFLASH_PICTURE_OUTSIDE_BOXING_OFF 0x00
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#define R6_NEWSFLASH_PICTURE_OUTSIDE_BOXING_ON 0x02
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#define R6_NEWSFLASH_TEXT_INSIDE_BOXING_OFF 0x00
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#define R6_NEWSFLASH_TEXT_INSIDE_BOXING_ON 0x04
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#define R6_NEWSFLASH_TEXT_OUTSIDE_BOXING_OFF 0x00
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#define R6_NEWSFLASH_TEXT_OUTSIDE_BOXING_ON 0x08
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#define R6_NEWSFLASH_CONTRAST_REDUCTION_INSIDE_BOXING_OFF 0x00
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#define R6_NEWSFLASH_CONTRAST_REDUCTION_INSIDE_BOXING_ON 0x10
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#define R6_NEWSFLASH_CONTRAST_REDUCTION_OUTSIDE_BOXING_OFF 0x00
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#define R6_NEWSFLASH_CONTRAST_REDUCTION_OUTSIDE_BOXING_ON 0x20
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#define R6_NEWSFLASH_BACKGROUND_COLOR_INSIDE_BOXING_OFF 0x00
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#define R6_NEWSFLASH_BACKGROUND_COLOR_INSIDE_BOXING_ON 0x40
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#define R6_NEWSFLASH_BACKGROUND_COLOR_OUTSIDE_BOXING_OFF 0x00
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#define R6_NEWSFLASH_BACKGROUND_COLOR_OUTSIDE_BOXING_ON 0x80
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/* Register R7 (Display mode) */
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#define R7_BOX_OFF_ROW_0 0x00
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#define R7_BOX_ON_ROW_0 0x01
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#define R7_BOX_OFF_ROW_1_TO_23 0x00
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#define R7_BOX_ON_ROW_1_TO_23 0x02
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#define R7_BOX_OFF_ROW_24 0x00
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#define R7_BOX_ON_ROW_24 0x04
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#define R7_SINGLE_HEIGHT 0x00
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#define R7_DOUBLE_HEIGHT 0x08
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#define R7_TOP_HALF 0x00
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#define R7_BOTTOM_HALF 0x10
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#define R7_REVEAL_OFF 0x00
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#define R7_REVEAL_ON 0x20
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#define R7_CURSER_OFF 0x00
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#define R7_CURSER_ON 0x40
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#define R7_STATUS_BOTTOM 0x00
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#define R7_STATUS_TOP 0x80
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/* Register R8 (Active chapter) */
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#define R8_ACTIVE_CHAPTER_0 0x00
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#define R8_ACTIVE_CHAPTER_1 0x01
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#define R8_ACTIVE_CHAPTER_2 0x02
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#define R8_ACTIVE_CHAPTER_3 0x03
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#define R8_ACTIVE_CHAPTER_4 0x04
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#define R8_ACTIVE_CHAPTER_5 0x05
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#define R8_ACTIVE_CHAPTER_6 0x06
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#define R8_ACTIVE_CHAPTER_7 0x07
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#define R8_CLEAR_MEMORY 0x08
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#define R8_DO_NOT_CLEAR_MEMORY 0x00
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/* Register R9 (Curser row) */
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#define R9_CURSER_ROW_0 0x00
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#define R9_CURSER_ROW_1 0x01
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#define R9_CURSER_ROW_2 0x02
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#define R9_CURSER_ROW_25 0x19
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/* Register R10 (Curser column) */
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#define R10_CURSER_COLUMN_0 0x00
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#define R10_CURSER_COLUMN_6 0x06
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#define R10_CURSER_COLUMN_8 0x08
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/*****************************************************************************/
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/* Row 25 control data in column 0 to 9 */
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/*****************************************************************************/
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#define ROW25_COLUMN0_PAGE_UNITS 0x0F
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#define ROW25_COLUMN1_PAGE_TENS 0x0F
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#define ROW25_COLUMN2_MINUTES_UNITS 0x0F
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#define ROW25_COLUMN3_MINUTES_TENS 0x07
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#define ROW25_COLUMN3_DELETE_PAGE 0x08
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#define ROW25_COLUMN4_HOUR_UNITS 0x0F
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#define ROW25_COLUMN5_HOUR_TENS 0x03
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#define ROW25_COLUMN5_INSERT_HEADLINE 0x04
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#define ROW25_COLUMN5_INSERT_SUBTITLE 0x08
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#define ROW25_COLUMN6_SUPPRESS_HEADER 0x01
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#define ROW25_COLUMN6_UPDATE_PAGE 0x02
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#define ROW25_COLUMN6_INTERRUPTED_SEQUENCE 0x04
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#define ROW25_COLUMN6_SUPPRESS_DISPLAY 0x08
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#define ROW25_COLUMN7_SERIAL_MODE 0x01
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#define ROW25_COLUMN7_CHARACTER_SET 0x0E
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#define ROW25_COLUMN8_PAGE_HUNDREDS 0x07
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#define ROW25_COLUMN8_PAGE_NOT_FOUND 0x10
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#define ROW25_COLUMN9_PAGE_BEING_LOOKED_FOR 0x20
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#define ROW25_COLUMN0_TO_7_HAMMING_ERROR 0x10
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/*****************************************************************************/
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/* Helper macros for extracting page, hour and minute digits */
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/*****************************************************************************/
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/* BYTE_POS 0 is at row 0, column 0,
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BYTE_POS 1 is at row 0, column 1,
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BYTE_POS 40 is at row 1, column 0, (with NUM_ROWS_PER_PAGE = 40)
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BYTE_POS 41 is at row 1, column 1, (with NUM_ROWS_PER_PAGE = 40),
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... */
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#define ROW(BYTE_POS) (BYTE_POS / NUM_ROWS_PER_PAGE)
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#define COLUMN(BYTE_POS) (BYTE_POS % NUM_ROWS_PER_PAGE)
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/*****************************************************************************/
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/* Helper macros for extracting page, hour and minute digits */
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/*****************************************************************************/
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/* Macros for extracting hundreds, tens and units of a page number which
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must be in the range 0 ... 0x799.
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Note that page is coded in hexadecimal, i.e. 0x123 means page 123.
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page 0x.. means page 8.. */
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#define HUNDREDS_OF_PAGE(page) (((page) / 0x100) & 0x7)
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#define TENS_OF_PAGE(page) (((page) / 0x10) & 0xF)
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#define UNITS_OF_PAGE(page) ((page) & 0xF)
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/* Macros for extracting tens and units of a hour information which
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must be in the range 0 ... 0x24.
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Note that hour is coded in hexadecimal, i.e. 0x12 means 12 hours */
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#define TENS_OF_HOUR(hour) ((hour) / 0x10)
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#define UNITS_OF_HOUR(hour) ((hour) & 0xF)
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/* Macros for extracting tens and units of a minute information which
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must be in the range 0 ... 0x59.
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Note that minute is coded in hexadecimal, i.e. 0x12 means 12 minutes */
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#define TENS_OF_MINUTE(minute) ((minute) / 0x10)
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#define UNITS_OF_MINUTE(minute) ((minute) & 0xF)
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#define HOUR_MAX 0x23
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#define MINUTE_MAX 0x59
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#define PAGE_MAX 0x8FF
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#endif /* __SAA5246A_H__ */
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