/* * 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 * * Derived from * * saa5249 driver * Copyright (C) 1998 Richard Guenther * * * with changes by * Alan Cox * * and * * vtx.c * Copyright (C) 1994-97 Martin Buck * * 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 #include #include #include #include #include #include #include #include #include #include #include #include "compat.h" MODULE_AUTHOR("Michael Geng "); 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 #if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 26) static unsigned short normal_i2c[] = { 0x11, I2C_CLIENT_END }; I2C_CLIENT_INSMOD; #endif 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, .minor = -1, }; 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; } #if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 26) static const struct i2c_device_id saa5246a_id[] = { { "saa5246a", 0 }, { } }; MODULE_DEVICE_TABLE(i2c, saa5246a_id); #endif static struct v4l2_i2c_driver_data v4l2_i2c_data = { .name = "saa5246a", .probe = saa5246a_probe, .remove = saa5246a_remove, #if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 26) .id_table = saa5246a_id, #endif };