+++ /dev/null
-/*
- * 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,
-};
+++ /dev/null
-/*
- * Modified in order to keep it compatible both with new and old videotext IOCTLs by
- * Michael Geng <linux@MichaelGeng.de>
- *
- * Cleaned up to use existing videodev interface and allow the idea
- * of multiple teletext decoders on the video4linux iface. Changed i2c
- * to cover addressing clashes on device busses. It's also rebuilt so
- * you can add arbitary multiple teletext devices to Linux video4linux
- * now (well 32 anyway).
- *
- * Alan Cox <alan@lxorguk.ukuu.org.uk>
- *
- * The original driver was heavily modified to match the i2c interface
- * It was truncated to use the WinTV boards, too.
- *
- * Copyright (c) 1998 Richard Guenther <richard.guenther@student.uni-tuebingen.de>
- *
- * Derived From
- *
- * vtx.c:
- * This is a loadable character-device-driver for videotext-interfaces
- * (aka teletext). Please check the Makefile/README for a list of supported
- * interfaces.
- *
- * 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/mutex.h>
-#include <linux/delay.h>
-#include <linux/videotext.h>
-#include <linux/videodev2.h>
-#include <linux/slab.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 SAA5249 Teletext decoder driver");
-MODULE_LICENSE("GPL");
-
-
-#define VTX_VER_MAJ 1
-#define VTX_VER_MIN 8
-
-
-#define NUM_DAUS 4
-#define NUM_BUFS 8
-
-static const int disp_modes[8][3] =
-{
- { 0x46, 0x03, 0x03 }, /* DISPOFF */
- { 0x46, 0xcc, 0xcc }, /* DISPNORM */
- { 0x44, 0x0f, 0x0f }, /* DISPTRANS */
- { 0x46, 0xcc, 0x46 }, /* DISPINS */
- { 0x44, 0x03, 0x03 }, /* DISPOFF, interlaced */
- { 0x44, 0xcc, 0xcc }, /* DISPNORM, interlaced */
- { 0x44, 0x0f, 0x0f }, /* DISPTRANS, interlaced */
- { 0x44, 0xcc, 0x46 } /* DISPINS, interlaced */
-};
-
-
-
-#define PAGE_WAIT msecs_to_jiffies(300) /* Time between requesting page and */
- /* checking status bits */
-#define PGBUF_EXPIRE msecs_to_jiffies(15000) /* Time to wait before retransmitting */
- /* page regardless of infobits */
-typedef struct {
- u8 pgbuf[VTX_VIRTUALSIZE]; /* Page-buffer */
- u8 laststat[10]; /* Last value of infobits for DAU */
- u8 sregs[7]; /* Page-request registers */
- unsigned long expire; /* Time when page will be expired */
- unsigned clrfound : 1; /* VTXIOCCLRFOUND has been called */
- unsigned stopped : 1; /* VTXIOCSTOPDAU has been called */
-} vdau_t;
-
-struct saa5249_device
-{
- struct v4l2_subdev sd;
- struct video_device *vdev;
- vdau_t vdau[NUM_DAUS]; /* Data for virtual DAUs (the 5249 only has one */
- /* real DAU, so we have to simulate some more) */
- int vtx_use_count;
- int is_searching[NUM_DAUS];
- int disp_mode;
- int virtual_mode;
- unsigned long in_use;
- struct mutex lock;
-};
-
-static inline struct saa5249_device *to_dev(struct v4l2_subdev *sd)
-{
- return container_of(sd, struct saa5249_device, sd);
-}
-
-
-#define CCTWR 34 /* I²C write/read-address of vtx-chip */
-#define CCTRD 35
-#define NOACK_REPEAT 10 /* Retry access this many times on failure */
-#define CLEAR_DELAY msecs_to_jiffies(50) /* Time required to clear a page */
-#define READY_TIMEOUT msecs_to_jiffies(30) /* Time to wait for ready signal of I2C-bus interface */
-#define INIT_DELAY 500 /* Time in usec to wait at initialization of CEA interface */
-#define START_DELAY 10 /* Time in usec to wait before starting write-cycle (CEA) */
-
-#define VTX_DEV_MINOR 0
-
-static struct video_device saa_template; /* Declared near bottom */
-
-/*
- * Wait the given number of jiffies (10ms). This calls the scheduler, so the actual
- * delay may be longer.
- */
-
-static void jdelay(unsigned long delay)
-{
- sigset_t oldblocked = current->blocked;
-
- spin_lock_irq(¤t->sighand->siglock);
- sigfillset(¤t->blocked);
- recalc_sigpending();
- spin_unlock_irq(¤t->sighand->siglock);
- msleep_interruptible(jiffies_to_msecs(delay));
-
- spin_lock_irq(¤t->sighand->siglock);
- current->blocked = oldblocked;
- recalc_sigpending();
- spin_unlock_irq(¤t->sighand->siglock);
-}
-
-
-/*
- * I2C interfaces
- */
-
-static int i2c_sendbuf(struct saa5249_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 saa5249_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 saa5249_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;
-}
-
-
-/*
- * Standard character-device-driver functions
- */
-
-static long do_saa5249_ioctl(struct file *file, unsigned int cmd, void *arg)
-{
- static int virtual_mode = false;
- struct saa5249_device *t = video_drvdata(file);
-
- switch (cmd) {
- case VTXIOCGETINFO:
- {
- vtx_info_t *info = arg;
- info->version_major = VTX_VER_MAJ;
- info->version_minor = VTX_VER_MIN;
- info->numpages = NUM_DAUS;
- /*info->cct_type = CCT_TYPE;*/
- return 0;
- }
-
- case VTXIOCCLRPAGE:
- {
- vtx_pagereq_t *req = arg;
-
- if (req->pgbuf < 0 || req->pgbuf >= NUM_DAUS)
- return -EINVAL;
- memset(t->vdau[req->pgbuf].pgbuf, ' ', sizeof(t->vdau[0].pgbuf));
- t->vdau[req->pgbuf].clrfound = true;
- return 0;
- }
-
- case VTXIOCCLRFOUND:
- {
- vtx_pagereq_t *req = arg;
-
- if (req->pgbuf < 0 || req->pgbuf >= NUM_DAUS)
- return -EINVAL;
- t->vdau[req->pgbuf].clrfound = true;
- return 0;
- }
-
- case VTXIOCPAGEREQ:
- {
- vtx_pagereq_t *req = arg;
- if (!(req->pagemask & PGMASK_PAGE))
- req->page = 0;
- if (!(req->pagemask & PGMASK_HOUR))
- req->hour = 0;
- if (!(req->pagemask & PGMASK_MINUTE))
- req->minute = 0;
- if (req->page < 0 || req->page > 0x8ff) /* 7FF ?? */
- return -EINVAL;
- req->page &= 0x7ff;
- if (req->hour < 0 || req->hour > 0x3f || req->minute < 0 || req->minute > 0x7f ||
- req->pagemask < 0 || req->pagemask >= PGMASK_MAX || req->pgbuf < 0 || req->pgbuf >= NUM_DAUS)
- return -EINVAL;
- t->vdau[req->pgbuf].sregs[0] = (req->pagemask & PG_HUND ? 0x10 : 0) | (req->page / 0x100);
- t->vdau[req->pgbuf].sregs[1] = (req->pagemask & PG_TEN ? 0x10 : 0) | ((req->page / 0x10) & 0xf);
- t->vdau[req->pgbuf].sregs[2] = (req->pagemask & PG_UNIT ? 0x10 : 0) | (req->page & 0xf);
- t->vdau[req->pgbuf].sregs[3] = (req->pagemask & HR_TEN ? 0x10 : 0) | (req->hour / 0x10);
- t->vdau[req->pgbuf].sregs[4] = (req->pagemask & HR_UNIT ? 0x10 : 0) | (req->hour & 0xf);
- t->vdau[req->pgbuf].sregs[5] = (req->pagemask & MIN_TEN ? 0x10 : 0) | (req->minute / 0x10);
- t->vdau[req->pgbuf].sregs[6] = (req->pagemask & MIN_UNIT ? 0x10 : 0) | (req->minute & 0xf);
- t->vdau[req->pgbuf].stopped = false;
- t->vdau[req->pgbuf].clrfound = true;
- t->is_searching[req->pgbuf] = true;
- return 0;
- }
-
- case VTXIOCGETSTAT:
- {
- vtx_pagereq_t *req = arg;
- u8 infobits[10];
- vtx_pageinfo_t info;
- int a;
-
- if (req->pgbuf < 0 || req->pgbuf >= NUM_DAUS)
- return -EINVAL;
- if (!t->vdau[req->pgbuf].stopped) {
- if (i2c_senddata(t, 2, 0, -1) ||
- i2c_sendbuf(t, 3, sizeof(t->vdau[0].sregs), t->vdau[req->pgbuf].sregs) ||
- i2c_senddata(t, 8, 0, 25, 0, ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', -1) ||
- i2c_senddata(t, 2, 0, t->vdau[req->pgbuf].sregs[0] | 8, -1) ||
- i2c_senddata(t, 8, 0, 25, 0, -1))
- return -EIO;
- jdelay(PAGE_WAIT);
- if (i2c_getdata(t, 10, infobits))
- return -EIO;
-
- if (!(infobits[8] & 0x10) && !(infobits[7] & 0xf0) && /* check FOUND-bit */
- (memcmp(infobits, t->vdau[req->pgbuf].laststat, sizeof(infobits)) ||
- time_after_eq(jiffies, t->vdau[req->pgbuf].expire)))
- { /* check if new page arrived */
- if (i2c_senddata(t, 8, 0, 0, 0, -1) ||
- i2c_getdata(t, VTX_PAGESIZE, t->vdau[req->pgbuf].pgbuf))
- return -EIO;
- t->vdau[req->pgbuf].expire = jiffies + PGBUF_EXPIRE;
- memset(t->vdau[req->pgbuf].pgbuf + VTX_PAGESIZE, ' ', VTX_VIRTUALSIZE - VTX_PAGESIZE);
- if (t->virtual_mode) {
- /* Packet X/24 */
- if (i2c_senddata(t, 8, 0, 0x20, 0, -1) ||
- i2c_getdata(t, 40, t->vdau[req->pgbuf].pgbuf + VTX_PAGESIZE + 20 * 40))
- return -EIO;
- /* Packet X/27/0 */
- if (i2c_senddata(t, 8, 0, 0x21, 0, -1) ||
- i2c_getdata(t, 40, t->vdau[req->pgbuf].pgbuf + VTX_PAGESIZE + 16 * 40))
- return -EIO;
- /* Packet 8/30/0...8/30/15
- * FIXME: AFAIK, the 5249 does hamming-decoding for some bytes in packet 8/30,
- * so we should undo this here.
- */
- if (i2c_senddata(t, 8, 0, 0x22, 0, -1) ||
- i2c_getdata(t, 40, t->vdau[req->pgbuf].pgbuf + VTX_PAGESIZE + 23 * 40))
- return -EIO;
- }
- t->vdau[req->pgbuf].clrfound = false;
- memcpy(t->vdau[req->pgbuf].laststat, infobits, sizeof(infobits));
- } else {
- memcpy(infobits, t->vdau[req->pgbuf].laststat, sizeof(infobits));
- }
- } else {
- memcpy(infobits, t->vdau[req->pgbuf].laststat, sizeof(infobits));
- }
-
- info.pagenum = ((infobits[8] << 8) & 0x700) | ((infobits[1] << 4) & 0xf0) | (infobits[0] & 0x0f);
- if (info.pagenum < 0x100)
- info.pagenum += 0x800;
- info.hour = ((infobits[5] << 4) & 0x30) | (infobits[4] & 0x0f);
- info.minute = ((infobits[3] << 4) & 0x70) | (infobits[2] & 0x0f);
- info.charset = ((infobits[7] >> 1) & 7);
- info.delete = !!(infobits[3] & 8);
- info.headline = !!(infobits[5] & 4);
- info.subtitle = !!(infobits[5] & 8);
- info.supp_header = !!(infobits[6] & 1);
- info.update = !!(infobits[6] & 2);
- info.inter_seq = !!(infobits[6] & 4);
- info.dis_disp = !!(infobits[6] & 8);
- info.serial = !!(infobits[7] & 1);
- info.notfound = !!(infobits[8] & 0x10);
- info.pblf = !!(infobits[9] & 0x20);
- info.hamming = 0;
- for (a = 0; a <= 7; a++) {
- if (infobits[a] & 0xf0) {
- info.hamming = 1;
- break;
- }
- }
- if (t->vdau[req->pgbuf].clrfound)
- info.notfound = 1;
- if (copy_to_user(req->buffer, &info, sizeof(vtx_pageinfo_t)))
- return -EFAULT;
- if (!info.hamming && !info.notfound)
- t->is_searching[req->pgbuf] = false;
- return 0;
- }
-
- case VTXIOCGETPAGE:
- {
- vtx_pagereq_t *req = arg;
- int start, end;
-
- if (req->pgbuf < 0 || req->pgbuf >= NUM_DAUS || req->start < 0 ||
- req->start > req->end || req->end >= (virtual_mode ? VTX_VIRTUALSIZE : VTX_PAGESIZE))
- return -EINVAL;
- if (copy_to_user(req->buffer, &t->vdau[req->pgbuf].pgbuf[req->start], req->end - req->start + 1))
- return -EFAULT;
-
- /*
- * Always read the time directly from SAA5249
- */
-
- if (req->start <= 39 && req->end >= 32) {
- int len;
- char buf[16];
- start = max(req->start, 32);
- end = min(req->end, 39);
- len = end - start + 1;
- if (i2c_senddata(t, 8, 0, 0, start, -1) ||
- i2c_getdata(t, len, buf))
- return -EIO;
- if (copy_to_user(req->buffer + start - req->start, buf, len))
- return -EFAULT;
- }
- /* Insert the current header if DAU is still searching for a page */
- if (req->start <= 31 && req->end >= 7 && t->is_searching[req->pgbuf]) {
- char buf[32];
- int len;
-
- start = max(req->start, 7);
- end = min(req->end, 31);
- len = end - start + 1;
- if (i2c_senddata(t, 8, 0, 0, start, -1) ||
- i2c_getdata(t, len, buf))
- return -EIO;
- if (copy_to_user(req->buffer + start - req->start, buf, len))
- return -EFAULT;
- }
- return 0;
- }
-
- case VTXIOCSTOPDAU:
- {
- vtx_pagereq_t *req = arg;
-
- if (req->pgbuf < 0 || req->pgbuf >= NUM_DAUS)
- return -EINVAL;
- t->vdau[req->pgbuf].stopped = true;
- t->is_searching[req->pgbuf] = false;
- return 0;
- }
-
- case VTXIOCPUTPAGE:
- case VTXIOCSETDISP:
- case VTXIOCPUTSTAT:
- return 0;
-
- case VTXIOCCLRCACHE:
- {
- if (i2c_senddata(t, 0, NUM_DAUS, 0, 8, -1) || i2c_senddata(t, 11,
- ' ', ' ', ' ', ' ', ' ', ' ',
- ' ', ' ', ' ', ' ', ' ', ' ',
- ' ', ' ', ' ', ' ', ' ', ' ',
- ' ', ' ', ' ', ' ', ' ', ' ',
- -1))
- return -EIO;
- if (i2c_senddata(t, 3, 0x20, -1))
- return -EIO;
- jdelay(10 * CLEAR_DELAY); /* I have no idea how long we have to wait here */
- return 0;
- }
-
- case VTXIOCSETVIRT:
- {
- /* The SAA5249 has virtual-row reception turned on always */
- t->virtual_mode = (int)(long)arg;
- 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 saa5249_ioctl(struct file *file,
- unsigned int cmd, unsigned long arg)
-{
- struct saa5249_device *t = video_drvdata(file);
- long err;
-
- cmd = vtx_fix_command(cmd);
- mutex_lock(&t->lock);
- err = video_usercopy(file, cmd, arg, do_saa5249_ioctl);
- mutex_unlock(&t->lock);
- return err;
-}
-
-static int saa5249_open(struct file *file)
-{
- struct saa5249_device *t = video_drvdata(file);
- int pgbuf;
-
- if (test_and_set_bit(0, &t->in_use))
- return -EBUSY;
-
- if (i2c_senddata(t, 0, 0, -1) || /* Select R11 */
- /* Turn off parity checks (we do this ourselves) */
- i2c_senddata(t, 1, disp_modes[t->disp_mode][0], 0, -1) ||
- /* Display TV-picture, no virtual rows */
- i2c_senddata(t, 4, NUM_DAUS, disp_modes[t->disp_mode][1], disp_modes[t->disp_mode][2], 7, -1))
- /* Set display to page 4 */
- {
- clear_bit(0, &t->in_use);
- return -EIO;
- }
-
- for (pgbuf = 0; pgbuf < NUM_DAUS; pgbuf++) {
- memset(t->vdau[pgbuf].pgbuf, ' ', sizeof(t->vdau[0].pgbuf));
- memset(t->vdau[pgbuf].sregs, 0, sizeof(t->vdau[0].sregs));
- memset(t->vdau[pgbuf].laststat, 0, sizeof(t->vdau[0].laststat));
- t->vdau[pgbuf].expire = 0;
- t->vdau[pgbuf].clrfound = true;
- t->vdau[pgbuf].stopped = true;
- t->is_searching[pgbuf] = false;
- }
- t->virtual_mode = false;
- return 0;
-}
-
-
-
-static int saa5249_release(struct file *file)
-{
- struct saa5249_device *t = video_drvdata(file);
-
- i2c_senddata(t, 1, 0x20, -1); /* Turn off CCT */
- i2c_senddata(t, 5, 3, 3, -1); /* Turn off TV-display */
- clear_bit(0, &t->in_use);
- return 0;
-}
-
-static const struct v4l2_file_operations saa_fops = {
- .owner = THIS_MODULE,
- .open = saa5249_open,
- .release = saa5249_release,
- .ioctl = saa5249_ioctl,
-};
-
-static struct video_device saa_template =
-{
- .name = "saa5249",
- .fops = &saa_fops,
- .release = video_device_release,
-};
-
-static int saa5249_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_SAA5249, 0);
-}
-
-static const struct v4l2_subdev_core_ops saa5249_core_ops = {
- .g_chip_ident = saa5249_g_chip_ident,
-};
-
-static const struct v4l2_subdev_ops saa5249_ops = {
- .core = &saa5249_core_ops,
-};
-
-static int saa5249_probe(struct i2c_client *client,
- const struct i2c_device_id *id)
-{
- int pgbuf;
- int err;
- struct saa5249_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",
- VTX_VER_MAJ, VTX_VER_MIN);
- t = kzalloc(sizeof(*t), GFP_KERNEL);
- if (t == NULL)
- return -ENOMEM;
- sd = &t->sd;
- v4l2_i2c_subdev_init(sd, client, &saa5249_ops);
- mutex_init(&t->lock);
-
- /* Now create a video4linux device */
- t->vdev = video_device_alloc();
- if (t->vdev == NULL) {
- kfree(t);
- kfree(client);
- return -ENOMEM;
- }
- memcpy(t->vdev, &saa_template, sizeof(*t->vdev));
-
- for (pgbuf = 0; pgbuf < NUM_DAUS; pgbuf++) {
- memset(t->vdau[pgbuf].pgbuf, ' ', sizeof(t->vdau[0].pgbuf));
- memset(t->vdau[pgbuf].sregs, 0, sizeof(t->vdau[0].sregs));
- memset(t->vdau[pgbuf].laststat, 0, sizeof(t->vdau[0].laststat));
- t->vdau[pgbuf].expire = 0;
- t->vdau[pgbuf].clrfound = true;
- t->vdau[pgbuf].stopped = true;
- 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 saa5249_remove(struct i2c_client *client)
-{
- struct v4l2_subdev *sd = i2c_get_clientdata(client);
- struct saa5249_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 saa5249_id[] = {
- { "saa5249", 0 },
- { }
-};
-MODULE_DEVICE_TABLE(i2c, saa5249_id);
-
-static struct v4l2_i2c_driver_data v4l2_i2c_data = {
- .name = "saa5249",
- .probe = saa5249_probe,
- .remove = saa5249_remove,
- .id_table = saa5249_id,
-};
projects / openwrt / staging / blogic.git / commitdiff