diff options
Diffstat (limited to 'drivers/media/video/saa5246a.c')
| -rw-r--r-- | drivers/media/video/saa5246a.c | 1123 |
1 files changed, 0 insertions, 1123 deletions
diff --git a/drivers/media/video/saa5246a.c b/drivers/media/video/saa5246a.c deleted file mode 100644 index 6b3b09e..0000000 --- a/drivers/media/video/saa5246a.c +++ /dev/null @@ -1,1123 +0,0 @@ -/* - * Driver for the SAA5246A or SAA5281 Teletext (=Videotext) decoder chips from - * Philips. - * - * Only capturing of Teletext pages is tested. The videotext chips also have a - * TV output but my hardware doesn't use it. For this reason this driver does - * not support changing any TV display settings. - * - * Copyright (C) 2004 Michael Geng <linux@MichaelGeng.de> - * - * Derived from - * - * saa5249 driver - * Copyright (C) 1998 Richard Guenther - * <richard.guenther@student.uni-tuebingen.de> - * - * with changes by - * Alan Cox <alan@lxorguk.ukuu.org.uk> - * - * and - * - * vtx.c - * Copyright (C) 1994-97 Martin Buck <martin-2.buck@student.uni-ulm.de> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, - * USA. - */ - -#include <linux/module.h> -#include <linux/kernel.h> -#include <linux/mm.h> -#include <linux/init.h> -#include <linux/i2c.h> -#include <linux/slab.h> -#include <linux/mutex.h> -#include <linux/videotext.h> -#include <linux/videodev2.h> -#include <media/v4l2-device.h> -#include <media/v4l2-chip-ident.h> -#include <media/v4l2-ioctl.h> -#include <media/v4l2-i2c-drv.h> - -MODULE_AUTHOR("Michael Geng <linux@MichaelGeng.de>"); -MODULE_DESCRIPTION("Philips SAA5246A, SAA5281 Teletext decoder driver"); -MODULE_LICENSE("GPL"); - -#define MAJOR_VERSION 1 /* driver major version number */ -#define MINOR_VERSION 8 /* driver minor version number */ - -/* Number of DAUs = number of pages that can be searched at the same time. */ -#define NUM_DAUS 4 - -#define NUM_ROWS_PER_PAGE 40 - -/* first column is 0 (not 1) */ -#define POS_TIME_START 32 -#define POS_TIME_END 39 - -#define POS_HEADER_START 7 -#define POS_HEADER_END 31 - -/* Returns 'true' if the part of the videotext page described with req contains - (at least parts of) the time field */ -#define REQ_CONTAINS_TIME(p_req) \ - ((p_req)->start <= POS_TIME_END && \ - (p_req)->end >= POS_TIME_START) - -/* Returns 'true' if the part of the videotext page described with req contains - (at least parts of) the page header */ -#define REQ_CONTAINS_HEADER(p_req) \ - ((p_req)->start <= POS_HEADER_END && \ - (p_req)->end >= POS_HEADER_START) - -/*****************************************************************************/ -/* Mode register numbers of the SAA5246A */ -/*****************************************************************************/ -#define SAA5246A_REGISTER_R0 0 -#define SAA5246A_REGISTER_R1 1 -#define SAA5246A_REGISTER_R2 2 -#define SAA5246A_REGISTER_R3 3 -#define SAA5246A_REGISTER_R4 4 -#define SAA5246A_REGISTER_R5 5 -#define SAA5246A_REGISTER_R6 6 -#define SAA5246A_REGISTER_R7 7 -#define SAA5246A_REGISTER_R8 8 -#define SAA5246A_REGISTER_R9 9 -#define SAA5246A_REGISTER_R10 10 -#define SAA5246A_REGISTER_R11 11 -#define SAA5246A_REGISTER_R11B 11 - -/* SAA5246A mode registers often autoincrement to the next register. - Therefore we use variable argument lists. The following macro indicates - the end of a command list. */ -#define COMMAND_END (-1) - -/*****************************************************************************/ -/* Contents of the mode registers of the SAA5246A */ -/*****************************************************************************/ -/* Register R0 (Advanced Control) */ -#define R0_SELECT_R11 0x00 -#define R0_SELECT_R11B 0x01 - -#define R0_PLL_TIME_CONSTANT_LONG 0x00 -#define R0_PLL_TIME_CONSTANT_SHORT 0x02 - -#define R0_ENABLE_nODD_EVEN_OUTPUT 0x00 -#define R0_DISABLE_nODD_EVEN_OUTPUT 0x04 - -#define R0_ENABLE_HDR_POLL 0x00 -#define R0_DISABLE_HDR_POLL 0x10 - -#define R0_DO_NOT_FORCE_nODD_EVEN_LOW_IF_PICTURE_DISPLAYED 0x00 -#define R0_FORCE_nODD_EVEN_LOW_IF_PICTURE_DISPLAYED 0x20 - -#define R0_NO_FREE_RUN_PLL 0x00 -#define R0_FREE_RUN_PLL 0x40 - -#define R0_NO_AUTOMATIC_FASTEXT_PROMPT 0x00 -#define R0_AUTOMATIC_FASTEXT_PROMPT 0x80 - -/* Register R1 (Mode) */ -#define R1_INTERLACED_312_AND_HALF_312_AND_HALF_LINES 0x00 -#define R1_NON_INTERLACED_312_313_LINES 0x01 -#define R1_NON_INTERLACED_312_312_LINES 0x02 -#define R1_FFB_LEADING_EDGE_IN_FIRST_BROAD_PULSE 0x03 -#define R1_FFB_LEADING_EDGE_IN_SECOND_BROAD_PULSE 0x07 - -#define R1_DEW 0x00 -#define R1_FULL_FIELD 0x08 - -#define R1_EXTENDED_PACKET_DISABLE 0x00 -#define R1_EXTENDED_PACKET_ENABLE 0x10 - -#define R1_DAUS_ALL_ON 0x00 -#define R1_DAUS_ALL_OFF 0x20 - -#define R1_7_BITS_PLUS_PARITY 0x00 -#define R1_8_BITS_NO_PARITY 0x40 - -#define R1_VCS_TO_SCS 0x00 -#define R1_NO_VCS_TO_SCS 0x80 - -/* Register R2 (Page request address) */ -#define R2_IN_R3_SELECT_PAGE_HUNDREDS 0x00 -#define R2_IN_R3_SELECT_PAGE_TENS 0x01 -#define R2_IN_R3_SELECT_PAGE_UNITS 0x02 -#define R2_IN_R3_SELECT_HOURS_TENS 0x03 -#define R2_IN_R3_SELECT_HOURS_UNITS 0x04 -#define R2_IN_R3_SELECT_MINUTES_TENS 0x05 -#define R2_IN_R3_SELECT_MINUTES_UNITS 0x06 - -#define R2_DAU_0 0x00 -#define R2_DAU_1 0x10 -#define R2_DAU_2 0x20 -#define R2_DAU_3 0x30 - -#define R2_BANK_0 0x00 -#define R2_BANK 1 0x40 - -#define R2_HAMMING_CHECK_ON 0x80 -#define R2_HAMMING_CHECK_OFF 0x00 - -/* Register R3 (Page request data) */ -#define R3_PAGE_HUNDREDS_0 0x00 -#define R3_PAGE_HUNDREDS_1 0x01 -#define R3_PAGE_HUNDREDS_2 0x02 -#define R3_PAGE_HUNDREDS_3 0x03 -#define R3_PAGE_HUNDREDS_4 0x04 -#define R3_PAGE_HUNDREDS_5 0x05 -#define R3_PAGE_HUNDREDS_6 0x06 -#define R3_PAGE_HUNDREDS_7 0x07 - -#define R3_HOLD_PAGE 0x00 -#define R3_UPDATE_PAGE 0x08 - -#define R3_PAGE_HUNDREDS_DO_NOT_CARE 0x00 -#define R3_PAGE_HUNDREDS_DO_CARE 0x10 - -#define R3_PAGE_TENS_DO_NOT_CARE 0x00 -#define R3_PAGE_TENS_DO_CARE 0x10 - -#define R3_PAGE_UNITS_DO_NOT_CARE 0x00 -#define R3_PAGE_UNITS_DO_CARE 0x10 - -#define R3_HOURS_TENS_DO_NOT_CARE 0x00 -#define R3_HOURS_TENS_DO_CARE 0x10 - -#define R3_HOURS_UNITS_DO_NOT_CARE 0x00 -#define R3_HOURS_UNITS_DO_CARE 0x10 - -#define R3_MINUTES_TENS_DO_NOT_CARE 0x00 -#define R3_MINUTES_TENS_DO_CARE 0x10 - -#define R3_MINUTES_UNITS_DO_NOT_CARE 0x00 -#define R3_MINUTES_UNITS_DO_CARE 0x10 - -/* Register R4 (Display chapter) */ -#define R4_DISPLAY_PAGE_0 0x00 -#define R4_DISPLAY_PAGE_1 0x01 -#define R4_DISPLAY_PAGE_2 0x02 -#define R4_DISPLAY_PAGE_3 0x03 -#define R4_DISPLAY_PAGE_4 0x04 -#define R4_DISPLAY_PAGE_5 0x05 -#define R4_DISPLAY_PAGE_6 0x06 -#define R4_DISPLAY_PAGE_7 0x07 - -/* Register R5 (Normal display control) */ -#define R5_PICTURE_INSIDE_BOXING_OFF 0x00 -#define R5_PICTURE_INSIDE_BOXING_ON 0x01 - -#define R5_PICTURE_OUTSIDE_BOXING_OFF 0x00 -#define R5_PICTURE_OUTSIDE_BOXING_ON 0x02 - -#define R5_TEXT_INSIDE_BOXING_OFF 0x00 -#define R5_TEXT_INSIDE_BOXING_ON 0x04 - -#define R5_TEXT_OUTSIDE_BOXING_OFF 0x00 -#define R5_TEXT_OUTSIDE_BOXING_ON 0x08 - -#define R5_CONTRAST_REDUCTION_INSIDE_BOXING_OFF 0x00 -#define R5_CONTRAST_REDUCTION_INSIDE_BOXING_ON 0x10 - -#define R5_CONTRAST_REDUCTION_OUTSIDE_BOXING_OFF 0x00 -#define R5_CONTRAST_REDUCTION_OUTSIDE_BOXING_ON 0x20 - -#define R5_BACKGROUND_COLOR_INSIDE_BOXING_OFF 0x00 -#define R5_BACKGROUND_COLOR_INSIDE_BOXING_ON 0x40 - -#define R5_BACKGROUND_COLOR_OUTSIDE_BOXING_OFF 0x00 -#define R5_BACKGROUND_COLOR_OUTSIDE_BOXING_ON 0x80 - -/* Register R6 (Newsflash display) */ -#define R6_NEWSFLASH_PICTURE_INSIDE_BOXING_OFF 0x00 -#define R6_NEWSFLASH_PICTURE_INSIDE_BOXING_ON 0x01 - -#define R6_NEWSFLASH_PICTURE_OUTSIDE_BOXING_OFF 0x00 -#define R6_NEWSFLASH_PICTURE_OUTSIDE_BOXING_ON 0x02 - -#define R6_NEWSFLASH_TEXT_INSIDE_BOXING_OFF 0x00 -#define R6_NEWSFLASH_TEXT_INSIDE_BOXING_ON 0x04 - -#define R6_NEWSFLASH_TEXT_OUTSIDE_BOXING_OFF 0x00 -#define R6_NEWSFLASH_TEXT_OUTSIDE_BOXING_ON 0x08 - -#define R6_NEWSFLASH_CONTRAST_REDUCTION_INSIDE_BOXING_OFF 0x00 -#define R6_NEWSFLASH_CONTRAST_REDUCTION_INSIDE_BOXING_ON 0x10 - -#define R6_NEWSFLASH_CONTRAST_REDUCTION_OUTSIDE_BOXING_OFF 0x00 -#define R6_NEWSFLASH_CONTRAST_REDUCTION_OUTSIDE_BOXING_ON 0x20 - -#define R6_NEWSFLASH_BACKGROUND_COLOR_INSIDE_BOXING_OFF 0x00 -#define R6_NEWSFLASH_BACKGROUND_COLOR_INSIDE_BOXING_ON 0x40 - -#define R6_NEWSFLASH_BACKGROUND_COLOR_OUTSIDE_BOXING_OFF 0x00 -#define R6_NEWSFLASH_BACKGROUND_COLOR_OUTSIDE_BOXING_ON 0x80 - -/* Register R7 (Display mode) */ -#define R7_BOX_OFF_ROW_0 0x00 -#define R7_BOX_ON_ROW_0 0x01 - -#define R7_BOX_OFF_ROW_1_TO_23 0x00 -#define R7_BOX_ON_ROW_1_TO_23 0x02 - -#define R7_BOX_OFF_ROW_24 0x00 -#define R7_BOX_ON_ROW_24 0x04 - -#define R7_SINGLE_HEIGHT 0x00 -#define R7_DOUBLE_HEIGHT 0x08 - -#define R7_TOP_HALF 0x00 -#define R7_BOTTOM_HALF 0x10 - -#define R7_REVEAL_OFF 0x00 -#define R7_REVEAL_ON 0x20 - -#define R7_CURSER_OFF 0x00 -#define R7_CURSER_ON 0x40 - -#define R7_STATUS_BOTTOM 0x00 -#define R7_STATUS_TOP 0x80 - -/* Register R8 (Active chapter) */ -#define R8_ACTIVE_CHAPTER_0 0x00 -#define R8_ACTIVE_CHAPTER_1 0x01 -#define R8_ACTIVE_CHAPTER_2 0x02 -#define R8_ACTIVE_CHAPTER_3 0x03 -#define R8_ACTIVE_CHAPTER_4 0x04 -#define R8_ACTIVE_CHAPTER_5 0x05 -#define R8_ACTIVE_CHAPTER_6 0x06 -#define R8_ACTIVE_CHAPTER_7 0x07 - -#define R8_CLEAR_MEMORY 0x08 -#define R8_DO_NOT_CLEAR_MEMORY 0x00 - -/* Register R9 (Curser row) */ -#define R9_CURSER_ROW_0 0x00 -#define R9_CURSER_ROW_1 0x01 -#define R9_CURSER_ROW_2 0x02 -#define R9_CURSER_ROW_25 0x19 - -/* Register R10 (Curser column) */ -#define R10_CURSER_COLUMN_0 0x00 -#define R10_CURSER_COLUMN_6 0x06 -#define R10_CURSER_COLUMN_8 0x08 - -/*****************************************************************************/ -/* Row 25 control data in column 0 to 9 */ -/*****************************************************************************/ -#define ROW25_COLUMN0_PAGE_UNITS 0x0F - -#define ROW25_COLUMN1_PAGE_TENS 0x0F - -#define ROW25_COLUMN2_MINUTES_UNITS 0x0F - -#define ROW25_COLUMN3_MINUTES_TENS 0x07 -#define ROW25_COLUMN3_DELETE_PAGE 0x08 - -#define ROW25_COLUMN4_HOUR_UNITS 0x0F - -#define ROW25_COLUMN5_HOUR_TENS 0x03 -#define ROW25_COLUMN5_INSERT_HEADLINE 0x04 -#define ROW25_COLUMN5_INSERT_SUBTITLE 0x08 - -#define ROW25_COLUMN6_SUPPRESS_HEADER 0x01 -#define ROW25_COLUMN6_UPDATE_PAGE 0x02 -#define ROW25_COLUMN6_INTERRUPTED_SEQUENCE 0x04 -#define ROW25_COLUMN6_SUPPRESS_DISPLAY 0x08 - -#define ROW25_COLUMN7_SERIAL_MODE 0x01 -#define ROW25_COLUMN7_CHARACTER_SET 0x0E - -#define ROW25_COLUMN8_PAGE_HUNDREDS 0x07 -#define ROW25_COLUMN8_PAGE_NOT_FOUND 0x10 - -#define ROW25_COLUMN9_PAGE_BEING_LOOKED_FOR 0x20 - -#define ROW25_COLUMN0_TO_7_HAMMING_ERROR 0x10 - -/*****************************************************************************/ -/* Helper macros for extracting page, hour and minute digits */ -/*****************************************************************************/ -/* BYTE_POS 0 is at row 0, column 0, - BYTE_POS 1 is at row 0, column 1, - BYTE_POS 40 is at row 1, column 0, (with NUM_ROWS_PER_PAGE = 40) - BYTE_POS 41 is at row 1, column 1, (with NUM_ROWS_PER_PAGE = 40), - ... */ -#define ROW(BYTE_POS) (BYTE_POS / NUM_ROWS_PER_PAGE) -#define COLUMN(BYTE_POS) (BYTE_POS % NUM_ROWS_PER_PAGE) - -/*****************************************************************************/ -/* Helper macros for extracting page, hour and minute digits */ -/*****************************************************************************/ -/* Macros for extracting hundreds, tens and units of a page number which - must be in the range 0 ... 0x799. - Note that page is coded in hexadecimal, i.e. 0x123 means page 123. - page 0x.. means page 8.. */ -#define HUNDREDS_OF_PAGE(page) (((page) / 0x100) & 0x7) -#define TENS_OF_PAGE(page) (((page) / 0x10) & 0xF) -#define UNITS_OF_PAGE(page) ((page) & 0xF) - -/* Macros for extracting tens and units of a hour information which - must be in the range 0 ... 0x24. - Note that hour is coded in hexadecimal, i.e. 0x12 means 12 hours */ -#define TENS_OF_HOUR(hour) ((hour) / 0x10) -#define UNITS_OF_HOUR(hour) ((hour) & 0xF) - -/* Macros for extracting tens and units of a minute information which - must be in the range 0 ... 0x59. - Note that minute is coded in hexadecimal, i.e. 0x12 means 12 minutes */ -#define TENS_OF_MINUTE(minute) ((minute) / 0x10) -#define UNITS_OF_MINUTE(minute) ((minute) & 0xF) - -#define HOUR_MAX 0x23 -#define MINUTE_MAX 0x59 -#define PAGE_MAX 0x8FF - - -struct saa5246a_device -{ - struct v4l2_subdev sd; - struct video_device *vdev; - u8 pgbuf[NUM_DAUS][VTX_VIRTUALSIZE]; - int is_searching[NUM_DAUS]; - unsigned long in_use; - struct mutex lock; -}; - -static inline struct saa5246a_device *to_dev(struct v4l2_subdev *sd) -{ - return container_of(sd, struct saa5246a_device, sd); -} - -static struct video_device saa_template; /* Declared near bottom */ - -/* - * I2C interfaces - */ - -static int i2c_sendbuf(struct saa5246a_device *t, int reg, int count, u8 *data) -{ - struct i2c_client *client = v4l2_get_subdevdata(&t->sd); - char buf[64]; - - buf[0] = reg; - memcpy(buf+1, data, count); - - if (i2c_master_send(client, buf, count + 1) == count + 1) - return 0; - return -1; -} - -static int i2c_senddata(struct saa5246a_device *t, ...) -{ - unsigned char buf[64]; - int v; - int ct = 0; - va_list argp; - va_start(argp, t); - - while ((v = va_arg(argp, int)) != -1) - buf[ct++] = v; - - va_end(argp); - return i2c_sendbuf(t, buf[0], ct-1, buf+1); -} - -/* Get count number of bytes from I²C-device at address adr, store them in buf. - * Start & stop handshaking is done by this routine, ack will be sent after the - * last byte to inhibit further sending of data. If uaccess is 'true', data is - * written to user-space with put_user. Returns -1 if I²C-device didn't send - * acknowledge, 0 otherwise - */ -static int i2c_getdata(struct saa5246a_device *t, int count, u8 *buf) -{ - struct i2c_client *client = v4l2_get_subdevdata(&t->sd); - - if (i2c_master_recv(client, buf, count) != count) - return -1; - return 0; -} - -/* When a page is found then the not FOUND bit in one of the status registers - * of the SAA5264A chip is cleared. Unfortunately this bit is not set - * automatically when a new page is requested. Instead this function must be - * called after a page has been requested. - * - * Return value: 0 if successful - */ -static int saa5246a_clear_found_bit(struct saa5246a_device *t, - unsigned char dau_no) -{ - unsigned char row_25_column_8; - - if (i2c_senddata(t, SAA5246A_REGISTER_R8, - - dau_no | - R8_DO_NOT_CLEAR_MEMORY, - - R9_CURSER_ROW_25, - - R10_CURSER_COLUMN_8, - - COMMAND_END) || - i2c_getdata(t, 1, &row_25_column_8)) - { - return -EIO; - } - row_25_column_8 |= ROW25_COLUMN8_PAGE_NOT_FOUND; - if (i2c_senddata(t, SAA5246A_REGISTER_R8, - - dau_no | - R8_DO_NOT_CLEAR_MEMORY, - - R9_CURSER_ROW_25, - - R10_CURSER_COLUMN_8, - - row_25_column_8, - - COMMAND_END)) - { - return -EIO; - } - - return 0; -} - -/* Requests one videotext page as described in req. The fields of req are - * checked and an error is returned if something is invalid. - * - * Return value: 0 if successful - */ -static int saa5246a_request_page(struct saa5246a_device *t, - vtx_pagereq_t *req) -{ - if (req->pagemask < 0 || req->pagemask >= PGMASK_MAX) - return -EINVAL; - if (req->pagemask & PGMASK_PAGE) - if (req->page < 0 || req->page > PAGE_MAX) - return -EINVAL; - if (req->pagemask & PGMASK_HOUR) - if (req->hour < 0 || req->hour > HOUR_MAX) - return -EINVAL; - if (req->pagemask & PGMASK_MINUTE) - if (req->minute < 0 || req->minute > MINUTE_MAX) - return -EINVAL; - if (req->pgbuf < 0 || req->pgbuf >= NUM_DAUS) - return -EINVAL; - - if (i2c_senddata(t, SAA5246A_REGISTER_R2, - - R2_IN_R3_SELECT_PAGE_HUNDREDS | - req->pgbuf << 4 | - R2_BANK_0 | - R2_HAMMING_CHECK_OFF, - - HUNDREDS_OF_PAGE(req->page) | - R3_HOLD_PAGE | - (req->pagemask & PG_HUND ? - R3_PAGE_HUNDREDS_DO_CARE : - R3_PAGE_HUNDREDS_DO_NOT_CARE), - - TENS_OF_PAGE(req->page) | - (req->pagemask & PG_TEN ? - R3_PAGE_TENS_DO_CARE : - R3_PAGE_TENS_DO_NOT_CARE), - - UNITS_OF_PAGE(req->page) | - (req->pagemask & PG_UNIT ? - R3_PAGE_UNITS_DO_CARE : - R3_PAGE_UNITS_DO_NOT_CARE), - - TENS_OF_HOUR(req->hour) | - (req->pagemask & HR_TEN ? - R3_HOURS_TENS_DO_CARE : - R3_HOURS_TENS_DO_NOT_CARE), - - UNITS_OF_HOUR(req->hour) | - (req->pagemask & HR_UNIT ? - R3_HOURS_UNITS_DO_CARE : - R3_HOURS_UNITS_DO_NOT_CARE), - - TENS_OF_MINUTE(req->minute) | - (req->pagemask & MIN_TEN ? - R3_MINUTES_TENS_DO_CARE : - R3_MINUTES_TENS_DO_NOT_CARE), - - UNITS_OF_MINUTE(req->minute) | - (req->pagemask & MIN_UNIT ? - R3_MINUTES_UNITS_DO_CARE : - R3_MINUTES_UNITS_DO_NOT_CARE), - - COMMAND_END) || i2c_senddata(t, SAA5246A_REGISTER_R2, - - R2_IN_R3_SELECT_PAGE_HUNDREDS | - req->pgbuf << 4 | - R2_BANK_0 | - R2_HAMMING_CHECK_OFF, - - HUNDREDS_OF_PAGE(req->page) | - R3_UPDATE_PAGE | - (req->pagemask & PG_HUND ? - R3_PAGE_HUNDREDS_DO_CARE : - R3_PAGE_HUNDREDS_DO_NOT_CARE), - - COMMAND_END)) - { - return -EIO; - } - - t->is_searching[req->pgbuf] = true; - return 0; -} - -/* This routine decodes the page number from the infobits contained in line 25. - * - * Parameters: - * infobits: must be bits 0 to 9 of column 25 - * - * Return value: page number coded in hexadecimal, i. e. page 123 is coded 0x123 - */ -static inline int saa5246a_extract_pagenum_from_infobits( - unsigned char infobits[10]) -{ - int page_hundreds, page_tens, page_units; - - page_units = infobits[0] & ROW25_COLUMN0_PAGE_UNITS; - page_tens = infobits[1] & ROW25_COLUMN1_PAGE_TENS; - page_hundreds = infobits[8] & ROW25_COLUMN8_PAGE_HUNDREDS; - - /* page 0x.. means page 8.. */ - if (page_hundreds == 0) - page_hundreds = 8; - - return((page_hundreds << 8) | (page_tens << 4) | page_units); -} - -/* Decodes the hour from the infobits contained in line 25. - * - * Parameters: - * infobits: must be bits 0 to 9 of column 25 - * - * Return: hour coded in hexadecimal, i. e. 12h is coded 0x12 - */ -static inline int saa5246a_extract_hour_from_infobits( - unsigned char infobits[10]) -{ - int hour_tens, hour_units; - - hour_units = infobits[4] & ROW25_COLUMN4_HOUR_UNITS; - hour_tens = infobits[5] & ROW25_COLUMN5_HOUR_TENS; - - return((hour_tens << 4) | hour_units); -} - -/* Decodes the minutes from the infobits contained in line 25. - * - * Parameters: - * infobits: must be bits 0 to 9 of column 25 - * - * Return: minutes coded in hexadecimal, i. e. 10min is coded 0x10 - */ -static inline int saa5246a_extract_minutes_from_infobits( - unsigned char infobits[10]) -{ - int minutes_tens, minutes_units; - - minutes_units = infobits[2] & ROW25_COLUMN2_MINUTES_UNITS; - minutes_tens = infobits[3] & ROW25_COLUMN3_MINUTES_TENS; - - return((minutes_tens << 4) | minutes_units); -} - -/* Reads the status bits contained in the first 10 columns of the first line - * and extracts the information into info. - * - * Return value: 0 if successful - */ -static inline int saa5246a_get_status(struct saa5246a_device *t, - vtx_pageinfo_t *info, unsigned char dau_no) -{ - unsigned char infobits[10]; - int column; - - if (dau_no >= NUM_DAUS) - return -EINVAL; - - if (i2c_senddata(t, SAA5246A_REGISTER_R8, - - dau_no | - R8_DO_NOT_CLEAR_MEMORY, - - R9_CURSER_ROW_25, - - R10_CURSER_COLUMN_0, - - COMMAND_END) || - i2c_getdata(t, 10, infobits)) - { - return -EIO; - } - - info->pagenum = saa5246a_extract_pagenum_from_infobits(infobits); - info->hour = saa5246a_extract_hour_from_infobits(infobits); - info->minute = saa5246a_extract_minutes_from_infobits(infobits); - info->charset = ((infobits[7] & ROW25_COLUMN7_CHARACTER_SET) >> 1); - info->delete = !!(infobits[3] & ROW25_COLUMN3_DELETE_PAGE); - info->headline = !!(infobits[5] & ROW25_COLUMN5_INSERT_HEADLINE); - info->subtitle = !!(infobits[5] & ROW25_COLUMN5_INSERT_SUBTITLE); - info->supp_header = !!(infobits[6] & ROW25_COLUMN6_SUPPRESS_HEADER); - info->update = !!(infobits[6] & ROW25_COLUMN6_UPDATE_PAGE); - info->inter_seq = !!(infobits[6] & ROW25_COLUMN6_INTERRUPTED_SEQUENCE); - info->dis_disp = !!(infobits[6] & ROW25_COLUMN6_SUPPRESS_DISPLAY); - info->serial = !!(infobits[7] & ROW25_COLUMN7_SERIAL_MODE); - info->notfound = !!(infobits[8] & ROW25_COLUMN8_PAGE_NOT_FOUND); - info->pblf = !!(infobits[9] & ROW25_COLUMN9_PAGE_BEING_LOOKED_FOR); - info->hamming = 0; - for (column = 0; column <= 7; column++) { - if (infobits[column] & ROW25_COLUMN0_TO_7_HAMMING_ERROR) { - info->hamming = 1; - break; - } - } - if (!info->hamming && !info->notfound) - t->is_searching[dau_no] = false; - return 0; -} - -/* Reads 1 videotext page buffer of the SAA5246A. - * - * req is used both as input and as output. It contains information which part - * must be read. The videotext page is copied into req->buffer. - * - * Return value: 0 if successful - */ -static inline int saa5246a_get_page(struct saa5246a_device *t, - vtx_pagereq_t *req) -{ - int start, end, size; - char *buf; - int err; - - if (req->pgbuf < 0 || req->pgbuf >= NUM_DAUS || - req->start < 0 || req->start > req->end || req->end >= VTX_PAGESIZE) - return -EINVAL; - - buf = kmalloc(VTX_PAGESIZE, GFP_KERNEL); - if (!buf) - return -ENOMEM; - - /* Read "normal" part of page */ - err = -EIO; - - end = min(req->end, VTX_PAGESIZE - 1); - if (i2c_senddata(t, SAA5246A_REGISTER_R8, - req->pgbuf | R8_DO_NOT_CLEAR_MEMORY, - ROW(req->start), COLUMN(req->start), COMMAND_END)) - goto out; - if (i2c_getdata(t, end - req->start + 1, buf)) - goto out; - err = -EFAULT; - if (copy_to_user(req->buffer, buf, end - req->start + 1)) - goto out; - - /* Always get the time from buffer 4, since this stupid SAA5246A only - * updates the currently displayed buffer... - */ - if (REQ_CONTAINS_TIME(req)) { - start = max(req->start, POS_TIME_START); - end = min(req->end, POS_TIME_END); - size = end - start + 1; - err = -EINVAL; - if (size < 0) - goto out; - err = -EIO; - if (i2c_senddata(t, SAA5246A_REGISTER_R8, - R8_ACTIVE_CHAPTER_4 | R8_DO_NOT_CLEAR_MEMORY, - R9_CURSER_ROW_0, start, COMMAND_END)) - goto out; - if (i2c_getdata(t, size, buf)) - goto out; - err = -EFAULT; - if (copy_to_user(req->buffer + start - req->start, buf, size)) - goto out; - } - /* Insert the header from buffer 4 only, if acquisition circuit is still searching for a page */ - if (REQ_CONTAINS_HEADER(req) && t->is_searching[req->pgbuf]) { - start = max(req->start, POS_HEADER_START); - end = min(req->end, POS_HEADER_END); - size = end - start + 1; - err = -EINVAL; - if (size < 0) - goto out; - err = -EIO; - if (i2c_senddata(t, SAA5246A_REGISTER_R8, - R8_ACTIVE_CHAPTER_4 | R8_DO_NOT_CLEAR_MEMORY, - R9_CURSER_ROW_0, start, COMMAND_END)) - goto out; - if (i2c_getdata(t, end - start + 1, buf)) - goto out; - err = -EFAULT; - if (copy_to_user(req->buffer + start - req->start, buf, size)) - goto out; - } - err = 0; -out: - kfree(buf); - return err; -} - -/* Stops the acquisition circuit given in dau_no. The page buffer associated - * with this acquisition circuit will no more be updated. The other daus are - * not affected. - * - * Return value: 0 if successful - */ -static inline int saa5246a_stop_dau(struct saa5246a_device *t, - unsigned char dau_no) -{ - if (dau_no >= NUM_DAUS) - return -EINVAL; - if (i2c_senddata(t, SAA5246A_REGISTER_R2, - - R2_IN_R3_SELECT_PAGE_HUNDREDS | - dau_no << 4 | - R2_BANK_0 | - R2_HAMMING_CHECK_OFF, - - R3_PAGE_HUNDREDS_0 | - R3_HOLD_PAGE | - R3_PAGE_HUNDREDS_DO_NOT_CARE, - - COMMAND_END)) - { - return -EIO; - } - t->is_searching[dau_no] = false; - return 0; -} - -/* Handles ioctls defined in videotext.h - * - * Returns 0 if successful - */ -static long do_saa5246a_ioctl(struct file *file, unsigned int cmd, void *arg) -{ - struct saa5246a_device *t = video_drvdata(file); - - switch(cmd) - { - case VTXIOCGETINFO: - { - vtx_info_t *info = arg; - - info->version_major = MAJOR_VERSION; - info->version_minor = MINOR_VERSION; - info->numpages = NUM_DAUS; - return 0; - } - - case VTXIOCCLRPAGE: - { - vtx_pagereq_t *req = arg; - - if (req->pgbuf < 0 || req->pgbuf >= NUM_DAUS) - return -EINVAL; - memset(t->pgbuf[req->pgbuf], ' ', sizeof(t->pgbuf[0])); - return 0; - } - - case VTXIOCCLRFOUND: - { - vtx_pagereq_t *req = arg; - - if (req->pgbuf < 0 || req->pgbuf >= NUM_DAUS) - return -EINVAL; - return(saa5246a_clear_found_bit(t, req->pgbuf)); - } - - case VTXIOCPAGEREQ: - { - vtx_pagereq_t *req = arg; - - return(saa5246a_request_page(t, req)); - } - - case VTXIOCGETSTAT: - { - vtx_pagereq_t *req = arg; - vtx_pageinfo_t info; - int rval; - - if ((rval = saa5246a_get_status(t, &info, req->pgbuf))) - return rval; - if(copy_to_user(req->buffer, &info, - sizeof(vtx_pageinfo_t))) - return -EFAULT; - return 0; - } - - case VTXIOCGETPAGE: - { - vtx_pagereq_t *req = arg; - - return(saa5246a_get_page(t, req)); - } - - case VTXIOCSTOPDAU: - { - vtx_pagereq_t *req = arg; - - return(saa5246a_stop_dau(t, req->pgbuf)); - } - - case VTXIOCPUTPAGE: - case VTXIOCSETDISP: - case VTXIOCPUTSTAT: - return 0; - - case VTXIOCCLRCACHE: - { - return 0; - } - - case VTXIOCSETVIRT: - { - /* I do not know what "virtual mode" means */ - return 0; - } - } - return -EINVAL; -} - -/* - * Translates old vtx IOCTLs to new ones - * - * This keeps new kernel versions compatible with old userspace programs. - */ -static inline unsigned int vtx_fix_command(unsigned int cmd) -{ - switch (cmd) { - case VTXIOCGETINFO_OLD: - cmd = VTXIOCGETINFO; - break; - case VTXIOCCLRPAGE_OLD: - cmd = VTXIOCCLRPAGE; - break; - case VTXIOCCLRFOUND_OLD: - cmd = VTXIOCCLRFOUND; - break; - case VTXIOCPAGEREQ_OLD: - cmd = VTXIOCPAGEREQ; - break; - case VTXIOCGETSTAT_OLD: - cmd = VTXIOCGETSTAT; - break; - case VTXIOCGETPAGE_OLD: - cmd = VTXIOCGETPAGE; - break; - case VTXIOCSTOPDAU_OLD: - cmd = VTXIOCSTOPDAU; - break; - case VTXIOCPUTPAGE_OLD: - cmd = VTXIOCPUTPAGE; - break; - case VTXIOCSETDISP_OLD: - cmd = VTXIOCSETDISP; - break; - case VTXIOCPUTSTAT_OLD: - cmd = VTXIOCPUTSTAT; - break; - case VTXIOCCLRCACHE_OLD: - cmd = VTXIOCCLRCACHE; - break; - case VTXIOCSETVIRT_OLD: - cmd = VTXIOCSETVIRT; - break; - } - return cmd; -} - -/* - * Handle the locking - */ -static long saa5246a_ioctl(struct file *file, - unsigned int cmd, unsigned long arg) -{ - struct saa5246a_device *t = video_drvdata(file); - long err; - - cmd = vtx_fix_command(cmd); - mutex_lock(&t->lock); - err = video_usercopy(file, cmd, arg, do_saa5246a_ioctl); - mutex_unlock(&t->lock); - return err; -} - -static int saa5246a_open(struct file *file) -{ - struct saa5246a_device *t = video_drvdata(file); - - if (test_and_set_bit(0, &t->in_use)) - return -EBUSY; - - if (i2c_senddata(t, SAA5246A_REGISTER_R0, - R0_SELECT_R11 | - R0_PLL_TIME_CONSTANT_LONG | - R0_ENABLE_nODD_EVEN_OUTPUT | - R0_ENABLE_HDR_POLL | - R0_DO_NOT_FORCE_nODD_EVEN_LOW_IF_PICTURE_DISPLAYED | - R0_NO_FREE_RUN_PLL | - R0_NO_AUTOMATIC_FASTEXT_PROMPT, - - R1_NON_INTERLACED_312_312_LINES | - R1_DEW | - R1_EXTENDED_PACKET_DISABLE | - R1_DAUS_ALL_ON | - R1_8_BITS_NO_PARITY | - R1_VCS_TO_SCS, - - COMMAND_END) || - i2c_senddata(t, SAA5246A_REGISTER_R4, - - /* We do not care much for the TV display but nevertheless we - * need the currently displayed page later because only on that - * page the time is updated. */ - R4_DISPLAY_PAGE_4, - - COMMAND_END)) - { - clear_bit(0, &t->in_use); - return -EIO; - } - return 0; -} - -static int saa5246a_release(struct file *file) -{ - struct saa5246a_device *t = video_drvdata(file); - - /* Stop all acquisition circuits. */ - i2c_senddata(t, SAA5246A_REGISTER_R1, - - R1_INTERLACED_312_AND_HALF_312_AND_HALF_LINES | - R1_DEW | - R1_EXTENDED_PACKET_DISABLE | - R1_DAUS_ALL_OFF | - R1_8_BITS_NO_PARITY | - R1_VCS_TO_SCS, - - COMMAND_END); - clear_bit(0, &t->in_use); - return 0; -} - -static const struct v4l2_file_operations saa_fops = { - .owner = THIS_MODULE, - .open = saa5246a_open, - .release = saa5246a_release, - .ioctl = saa5246a_ioctl, -}; - -static struct video_device saa_template = -{ - .name = "saa5246a", - .fops = &saa_fops, - .release = video_device_release, -}; - -static int saa5246a_g_chip_ident(struct v4l2_subdev *sd, struct v4l2_dbg_chip_ident *chip) -{ - struct i2c_client *client = v4l2_get_subdevdata(sd); - - return v4l2_chip_ident_i2c_client(client, chip, V4L2_IDENT_SAA5246A, 0); -} - -static const struct v4l2_subdev_core_ops saa5246a_core_ops = { - .g_chip_ident = saa5246a_g_chip_ident, -}; - -static const struct v4l2_subdev_ops saa5246a_ops = { - .core = &saa5246a_core_ops, -}; - - -static int saa5246a_probe(struct i2c_client *client, - const struct i2c_device_id *id) -{ - int pgbuf; - int err; - struct saa5246a_device *t; - struct v4l2_subdev *sd; - - v4l_info(client, "chip found @ 0x%x (%s)\n", - client->addr << 1, client->adapter->name); - v4l_info(client, "VideoText version %d.%d\n", - MAJOR_VERSION, MINOR_VERSION); - t = kzalloc(sizeof(*t), GFP_KERNEL); - if (t == NULL) - return -ENOMEM; - sd = &t->sd; - v4l2_i2c_subdev_init(sd, client, &saa5246a_ops); - mutex_init(&t->lock); - - /* Now create a video4linux device */ - t->vdev = video_device_alloc(); - if (t->vdev == NULL) { - kfree(t); - return -ENOMEM; - } - memcpy(t->vdev, &saa_template, sizeof(*t->vdev)); - - for (pgbuf = 0; pgbuf < NUM_DAUS; pgbuf++) { - memset(t->pgbuf[pgbuf], ' ', sizeof(t->pgbuf[0])); - t->is_searching[pgbuf] = false; - } - video_set_drvdata(t->vdev, t); - - /* Register it */ - err = video_register_device(t->vdev, VFL_TYPE_VTX, -1); - if (err < 0) { - video_device_release(t->vdev); - kfree(t); - return err; - } - return 0; -} - -static int saa5246a_remove(struct i2c_client *client) -{ - struct v4l2_subdev *sd = i2c_get_clientdata(client); - struct saa5246a_device *t = to_dev(sd); - - video_unregister_device(t->vdev); - v4l2_device_unregister_subdev(sd); - kfree(t); - return 0; -} - -static const struct i2c_device_id saa5246a_id[] = { - { "saa5246a", 0 }, - { } -}; -MODULE_DEVICE_TABLE(i2c, saa5246a_id); - -static struct v4l2_i2c_driver_data v4l2_i2c_data = { - .name = "saa5246a", - .probe = saa5246a_probe, - .remove = saa5246a_remove, - .id_table = saa5246a_id, -}; |
