--- /dev/null
+/*
+ * Driver for the SAA5246A videotext decoder chip from Philips.
+ *
+ * Only capturing of videotext pages is tested. The SAA5246A chip also has
+ * 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.Cox@linux.org>
+ *
+ * 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/sched.h>
+#include <linux/mm.h>
+#include <linux/init.h>
+#include <linux/i2c.h>
+#include <linux/videotext.h>
+#include <linux/videodev.h>
+#include "saa5246a.h"
+
+struct saa5246a_device
+{
+ u8 pgbuf[NUM_DAUS][VTX_VIRTUALSIZE];
+ int is_searching[NUM_DAUS];
+ struct i2c_client *client;
+ struct semaphore lock;
+};
+
+static struct video_device saa_template; /* Declared near bottom */
+
+/* Addresses to scan */
+static unsigned short normal_i2c[] = { I2C_ADDRESS, I2C_CLIENT_END };
+static unsigned short normal_i2c_range[] = { I2C_CLIENT_END };
+static unsigned short probe[2] = { I2C_CLIENT_END, I2C_CLIENT_END };
+static unsigned short probe_range[2] = { I2C_CLIENT_END, I2C_CLIENT_END };
+static unsigned short ignore[2] = { I2C_CLIENT_END, I2C_CLIENT_END };
+static unsigned short ignore_range[2] = { I2C_CLIENT_END, I2C_CLIENT_END };
+static unsigned short force[2] = { I2C_CLIENT_END, I2C_CLIENT_END };
+
+static struct i2c_client_address_data addr_data = {
+ normal_i2c, normal_i2c_range,
+ probe, probe_range,
+ ignore, ignore_range,
+ force
+};
+
+static struct i2c_client client_template;
+
+static int saa5246a_attach(struct i2c_adapter *adap, int addr, int kind)
+{
+ int pgbuf;
+ int err;
+ struct i2c_client *client;
+ struct video_device *vd;
+ struct saa5246a_device *t;
+
+ printk(KERN_INFO "saa5246a: teletext chip found.\n");
+ client=kmalloc(sizeof(*client), GFP_KERNEL);
+ if(client==NULL)
+ return -ENOMEM;
+ client_template.adapter = adap;
+ client_template.addr = addr;
+ memcpy(client, &client_template, sizeof(*client));
+ t = kmalloc(sizeof(*t), GFP_KERNEL);
+ if(t==NULL)
+ {
+ kfree(client);
+ return -ENOMEM;
+ }
+ memset(t, 0, sizeof(*t));
+ strlcpy(client->name, IF_NAME, I2C_NAME_SIZE);
+ init_MUTEX(&t->lock);
+
+ /*
+ * Now create a video4linux device
+ */
+
+ vd = video_device_alloc();
+ if(vd==NULL)
+ {
+ kfree(t);
+ kfree(client);
+ return -ENOMEM;
+ }
+ i2c_set_clientdata(client, vd);
+ memcpy(vd, &saa_template, sizeof(*vd));
+
+ for (pgbuf = 0; pgbuf < NUM_DAUS; pgbuf++)
+ {
+ memset(t->pgbuf[pgbuf], ' ', sizeof(t->pgbuf[0]));
+ t->is_searching[pgbuf] = FALSE;
+ }
+ vd->priv=t;
+
+
+ /*
+ * Register it
+ */
+
+ if((err=video_register_device(vd, VFL_TYPE_VTX,-1))<0)
+ {
+ kfree(t);
+ kfree(client);
+ video_device_release(vd);
+ return err;
+ }
+ t->client = client;
+ i2c_attach_client(client);
+ return 0;
+}
+
+/*
+ * We do most of the hard work when we become a device on the i2c.
+ */
+static int saa5246a_probe(struct i2c_adapter *adap)
+{
+ if (adap->class & I2C_ADAP_CLASS_TV_ANALOG)
+ return i2c_probe(adap, &addr_data, saa5246a_attach);
+ return 0;
+}
+
+static int saa5246a_detach(struct i2c_client *client)
+{
+ struct video_device *vd = i2c_get_clientdata(client);
+ i2c_detach_client(client);
+ video_unregister_device(vd);
+ kfree(vd->priv);
+ kfree(client);
+ return 0;
+}
+
+static int saa5246a_command(struct i2c_client *device, unsigned int cmd,
+ void *arg)
+{
+ return -EINVAL;
+}
+
+/*
+ * I2C interfaces
+ */
+
+static struct i2c_driver i2c_driver_videotext =
+{
+ .owner = THIS_MODULE,
+ .name = IF_NAME, /* name */
+ .id = I2C_DRIVERID_SAA5249, /* in i2c.h */
+ .flags = I2C_DF_NOTIFY,
+ .attach_adapter = saa5246a_probe,
+ .detach_client = saa5246a_detach,
+ .command = saa5246a_command
+};
+
+static struct i2c_client client_template = {
+ .id = -1,
+ .driver = &i2c_driver_videotext,
+ .name = "(unset)",
+};
+
+static int i2c_sendbuf(struct saa5246a_device *t, int reg, int count, u8 *data)
+{
+ char buf[64];
+
+ buf[0] = reg;
+ memcpy(buf+1, data, count);
+
+ if(i2c_master_send(t->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;
+ 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)
+{
+ if(i2c_master_recv(t->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;
+
+ if (req->pgbuf < 0 || req->pgbuf >= NUM_DAUS ||
+ req->start < 0 || req->start > req->end || req->end >= VTX_PAGESIZE)
+ return -EINVAL;
+ /* Read "normal" part of page */
+ 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) ||
+ i2c_getdata(t, end - req->start + 1, req->buffer))
+ {
+ return -EIO;
+ }
+ /* 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);
+ if (i2c_senddata(t, SAA5246A_REGISTER_R8,
+
+ R8_ACTIVE_CHAPTER_4 |
+ R8_DO_NOT_CLEAR_MEMORY,
+
+ R9_CURSER_ROW_0,
+
+ start,
+
+ COMMAND_END) ||
+ i2c_getdata(t, end - start + 1,
+ req->buffer + start - req->start))
+ {
+ return -EIO;
+ }
+ }
+ /* 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);
+ if (i2c_senddata(t, SAA5246A_REGISTER_R8,
+
+ R8_ACTIVE_CHAPTER_4 |
+ R8_DO_NOT_CLEAR_MEMORY,
+
+ R9_CURSER_ROW_0,
+
+ start,
+
+ COMMAND_END) ||
+ i2c_getdata(t, end - start + 1,
+ req->buffer + start - req->start))
+ {
+ return -EIO;
+ }
+ }
+
+ return 0;
+}
+
+/* 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 int do_saa5246a_ioctl(struct inode *inode, struct file *file,
+ unsigned int cmd, void *arg)
+{
+ struct video_device *vd = video_devdata(file);
+ struct saa5246a_device *t=vd->priv;
+ 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;
+}
+
+/*
+ * Handle the locking
+ */
+static int saa5246a_ioctl(struct inode *inode, struct file *file,
+ unsigned int cmd, unsigned long arg)
+{
+ struct video_device *vd = video_devdata(file);
+ struct saa5246a_device *t = vd->priv;
+ int err;
+
+ down(&t->lock);
+ err = video_usercopy(inode, file, cmd, arg, do_saa5246a_ioctl);
+ up(&t->lock);
+ return err;
+}
+
+static int saa5246a_open(struct inode *inode, struct file *file)
+{
+ struct video_device *vd = video_devdata(file);
+ struct saa5246a_device *t = vd->priv;
+ int err;
+
+ err = video_exclusive_open(inode,file);
+ if (err < 0)
+ return err;
+
+ if (t->client==NULL) {
+ err = -ENODEV;
+ goto fail;
+ }
+
+ 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))
+ {
+ err = -EIO;
+ goto fail;
+ }
+
+ return 0;
+
+fail:
+ video_exclusive_release(inode,file);
+ return err;
+}
+
+static int saa5246a_release(struct inode *inode, struct file *file)
+{
+ struct video_device *vd = video_devdata(file);
+ struct saa5246a_device *t = vd->priv;
+
+ /* 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);
+ video_exclusive_release(inode,file);
+ return 0;
+}
+
+static int __init init_saa_5246a (void)
+{
+ printk(KERN_INFO "SAA5246A driver (" IF_NAME
+ " interface) for VideoText version %d.%d\n",
+ MAJOR_VERSION, MINOR_VERSION);
+ return i2c_add_driver(&i2c_driver_videotext);
+}
+
+static void __exit cleanup_saa_5246a (void)
+{
+ i2c_del_driver(&i2c_driver_videotext);
+}
+
+module_init(init_saa_5246a);
+module_exit(cleanup_saa_5246a);
+
+static struct file_operations saa_fops = {
+ .owner = THIS_MODULE,
+ .open = saa5246a_open,
+ .release = saa5246a_release,
+ .ioctl = saa5246a_ioctl,
+ .llseek = no_llseek,
+};
+
+static struct video_device saa_template =
+{
+ .owner = THIS_MODULE,
+ .name = IF_NAME,
+ .type = VID_TYPE_TELETEXT,
+ .hardware = VID_HARDWARE_SAA5249,
+ .fops = &saa_fops,
+ .release = video_device_release,
+ .minor = -1,
+};
+
+MODULE_LICENSE("GPL");
--- /dev/null
+/*
+ Driver for the SAA5246A videotext decoder chip from Philips.
+ Copyright (C) 2004 Michael Geng (linux@MichaelGeng.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., 675 Mass Ave, Cambridge, MA 02139, USA.
+
+ */
+#ifndef __SAA5246A_H__
+#define __SAA5246A_H__
+
+#define MAJOR_VERSION 1 /* driver major version number */
+#define MINOR_VERSION 6 /* driver minor version number */
+
+#define IF_NAME "SAA5246A"
+
+#define I2C_ADDRESS 17
+
+/* 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)
+
+#ifndef FALSE
+#define FALSE 0
+#define TRUE 1
+#endif
+
+/*****************************************************************************/
+/* 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
+
+#endif /* __SAA5246A_H__ */
projects / history.git / commitdiff