diff options
| -rw-r--r-- | config.h.in | 6 | ||||
| -rwxr-xr-x | configure | 79 | ||||
| -rw-r--r-- | configure.in | 14 | ||||
| -rw-r--r-- | drivers.m4 | 9 | ||||
| -rw-r--r-- | drv_HD44780.c | 2987 | ||||
| -rw-r--r-- | drv_generic_i2c.c | 350 | ||||
| -rw-r--r-- | drv_generic_i2c.h | 139 | ||||
| -rw-r--r-- | lcd4linux_i2c.h | 643 |
8 files changed, 2408 insertions, 1819 deletions
diff --git a/config.h.in b/config.h.in index 6381155..d008bc9 100644 --- a/config.h.in +++ b/config.h.in @@ -55,12 +55,6 @@ /* Define to 1 if you have the <linux/dvb/frontend.h> header file. */ #undef HAVE_LINUX_DVB_FRONTEND_H -/* Define to 1 if you have the <linux/i2c-dev.h> header file. */ -#undef HAVE_LINUX_I2C_DEV_H - -/* Define to 1 if you have the <linux/i2c.h> header file. */ -#undef HAVE_LINUX_I2C_H - /* Define to 1 if you have the <linux/isdn.h> header file. */ #undef HAVE_LINUX_ISDN_H @@ -5452,76 +5452,7 @@ done # check for i2c - - - -for ac_header in linux/compiler.h linux/i2c.h linux/i2c-dev.h -do -as_ac_Header=`echo "ac_cv_header_$ac_header" | $as_tr_sh` -echo "$as_me:$LINENO: checking for $ac_header" >&5 -echo $ECHO_N "checking for $ac_header... $ECHO_C" >&6 -if eval "test \"\${$as_ac_Header+set}\" = set"; then - echo $ECHO_N "(cached) $ECHO_C" >&6 -else - cat >conftest.$ac_ext <<_ACEOF -/* confdefs.h. */ -_ACEOF -cat confdefs.h >>conftest.$ac_ext -cat >>conftest.$ac_ext <<_ACEOF -/* end confdefs.h. */ - -#if HAVE_LINUX_COMPILER_H -#include <linux/compiler.h> -# endif -#if HAVE_LINUX_I2C_H -#include <linux/i2c.h> -# endif - - -#include <$ac_header> -_ACEOF -rm -f conftest.$ac_objext -if { (eval echo "$as_me:$LINENO: \"$ac_compile\"") >&5 - (eval $ac_compile) 2>conftest.er1 - ac_status=$? - grep -v '^ *+' conftest.er1 >conftest.err - rm -f conftest.er1 - cat conftest.err >&5 - echo "$as_me:$LINENO: \$? = $ac_status" >&5 - (exit $ac_status); } && - { ac_try='test -z "$ac_c_werror_flag" || test ! -s conftest.err' - { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5 - (eval $ac_try) 2>&5 - ac_status=$? - echo "$as_me:$LINENO: \$? = $ac_status" >&5 - (exit $ac_status); }; } && - { ac_try='test -s conftest.$ac_objext' - { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5 - (eval $ac_try) 2>&5 - ac_status=$? - echo "$as_me:$LINENO: \$? = $ac_status" >&5 - (exit $ac_status); }; }; then - eval "$as_ac_Header=yes" -else - echo "$as_me: failed program was:" >&5 -sed 's/^/| /' conftest.$ac_ext >&5 - -eval "$as_ac_Header=no" -fi -rm -f conftest.err conftest.$ac_objext conftest.$ac_ext -fi -echo "$as_me:$LINENO: result: `eval echo '${'$as_ac_Header'}'`" >&5 -echo "${ECHO_T}`eval echo '${'$as_ac_Header'}'`" >&6 -if test `eval echo '${'$as_ac_Header'}'` = yes; then - cat >>confdefs.h <<_ACEOF -#define `echo "HAVE_$ac_header" | $as_tr_cpp` 1 -_ACEOF - has_i2c="true" -else - has_i2c="false";break -fi - -done +has_i2c="true" # check for serdisplib @@ -6062,7 +5993,7 @@ TEXT="no" GRAPHIC="no" IMAGE="no" -# generiv I/O drivers +# generic I/O drivers PARPORT="no" SERIAL="no" I2C="no" @@ -6374,18 +6305,12 @@ fi # generic i2c driver if test "$I2C" = "yes"; then - if test "$has_i2c" = true; then DRIVERS="$DRIVERS drv_generic_i2c.o" cat >>confdefs.h <<\_ACEOF #define WITH_I2C 1 _ACEOF - else - I2C="no" - { echo "$as_me:$LINENO: WARNING: I2C include files not found: I2C bus driver disabled" >&5 -echo "$as_me: WARNING: I2C include files not found: I2C bus driver disabled" >&2;} - fi fi diff --git a/configure.in b/configure.in index a2d9822..8c42187 100644 --- a/configure.in +++ b/configure.in @@ -54,23 +54,9 @@ AC_CHECK_HEADERS(gd/gd.h gd.h, [has_gd="true";break], [has_gd="false"]) # check for usb.h AC_CHECK_HEADERS(usb.h, [has_usb="true"], [has_usb="false"]) -# check for i2c -AC_CHECK_HEADERS(linux/compiler.h linux/i2c.h linux/i2c-dev.h,[has_i2c="true"],[has_i2c="false";break],[ -#if HAVE_LINUX_COMPILER_H -#include <linux/compiler.h> -# endif -#if HAVE_LINUX_I2C_H -#include <linux/i2c.h> -# endif -]) - # check for serdisplib AC_CHECK_HEADERS(serdisplib/serdisp.h, [has_serdisplib="true"], [has_serdisplib="false"]) -# check for python -sinclude(python.m4) -AC_PYTHON_DEVEL - # drivers sinclude(drivers.m4) @@ -372,13 +372,8 @@ fi # generic i2c driver if test "$I2C" = "yes"; then - if test "$has_i2c" = true; then - DRIVERS="$DRIVERS drv_generic_i2c.o" - AC_DEFINE(WITH_I2C, 1, [I2C bus driver]) - else - I2C="no" - AC_MSG_WARN(I2C include files not found: I2C bus driver disabled) - fi + DRIVERS="$DRIVERS drv_generic_i2c.o" + AC_DEFINE(WITH_I2C, 1, [I2C bus driver]) fi diff --git a/drv_HD44780.c b/drv_HD44780.c index e032a5d..91215c3 100644 --- a/drv_HD44780.c +++ b/drv_HD44780.c @@ -1,1492 +1,1497 @@ -/* $Id: drv_HD44780.c,v 1.49 2005/05/08 04:32:44 reinelt Exp $ - * - * new style driver for HD44780-based displays - * - * Copyright (C) 2003 Michael Reinelt <reinelt@eunet.at> - * Copyright (C) 2004 The LCD4Linux Team <lcd4linux-devel@users.sourceforge.net> - * - * Support for I2C bus - * Copyright (C) 2005 Luis F. Correia <luis.f.correia@seg-social.pt> - * - * Modification for 4-Bit mode - * Copyright (C) 2003 Martin Hejl (martin@hejl.de) - * - * Modification for 2nd controller support - * Copyright (C) 2003 Jesse Brook Kovach <jkovach@wam.umd.edu> - * - * This file is part of LCD4Linux. - * - * LCD4Linux 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, or (at your option) - * any later version. - * - * LCD4Linux 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. - * - * +/* $Id: drv_HD44780.c,v 1.50 2005/05/31 20:42:55 lfcorreia Exp $
+ *
+ * new style driver for HD44780-based displays
+ *
+ * Copyright (C) 2003 Michael Reinelt <reinelt@eunet.at>
+ * Copyright (C) 2004 The LCD4Linux Team <lcd4linux-devel@users.sourceforge.net>
+ *
+ * Support for I2C bus
+ * Copyright (C) 2005 Luis F. Correia <luis.f.correia@seg-social.pt>
+ *
+ * Modification for 4-Bit mode
+ * Copyright (C) 2003 Martin Hejl (martin@hejl.de)
+ *
+ * Modification for 2nd controller support
+ * Copyright (C) 2003 Jesse Brook Kovach <jkovach@wam.umd.edu>
+ *
+ * This file is part of LCD4Linux.
+ *
+ * LCD4Linux 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, or (at your option)
+ * any later version.
+ *
+ * LCD4Linux 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.
+ *
+ *
* $Log: drv_HD44780.c,v $ - * Revision 1.49 2005/05/08 04:32:44 reinelt - * CodingStyle added and applied - * - * Revision 1.48 2005/05/05 08:36:12 reinelt - * changed SELECT to SLCTIN - * - * Revision 1.47 2005/03/28 22:29:23 reinelt - * HD44780 multiple displays patch from geronet - * - * Revision 1.46 2005/03/28 19:39:23 reinelt - * HD44780/I2C patch from Luis merged (still does not work for me) - * - * Revision 1.45 2005/03/25 15:44:43 reinelt - * HD44780 Backlight fixed (thanks to geronet) - * - * Revision 1.44 2005/01/29 09:30:56 reinelt - * minor HD44780 cleanups - * - * Revision 1.43 2005/01/18 06:30:23 reinelt - * added (C) to all copyright statements - * - * Revision 1.42 2005/01/17 06:38:48 reinelt - * info about backlight and brightness - * - * Revision 1.41 2005/01/17 06:29:24 reinelt - * added software-controlled backlight support to HD44780 - * - * Revision 1.40 2004/11/30 05:01:25 reinelt - * removed compiler warnings for deactivated i2c bus - * - * Revision 1.39 2004/10/17 09:24:31 reinelt - * I2C support for HD44780 displays by Luis (does not work by now) - * - * Revision 1.38 2004/09/19 09:31:19 reinelt - * HD44780 busy flag checking improved: fall back to busy-waiting if too many errors occur - * - * Revision 1.37 2004/09/18 15:58:57 reinelt - * even more HD44780 cleanups, hardwiring for LCM-162 - * - * Revision 1.36 2004/09/18 10:57:29 reinelt - * more parport/i2c cleanups - * - * Revision 1.35 2004/09/18 09:48:29 reinelt - * HD44780 cleanup and prepararation for I2C backend - * LCM-162 submodel framework - * - * Revision 1.34 2004/09/18 08:22:59 reinelt - * drv_generic_parport_status() to read status lines - * - * Revision 1.33 2004/08/29 13:03:41 reinelt - * - * added RouterBoard driver - * - * Revision 1.32 2004/06/26 12:04:59 reinelt - * - * uh-oh... the last CVS log message messed up things a lot... - * - * Revision 1.31 2004/06/26 09:27:20 reinelt - * - * added '-W' to CFLAGS - * changed all C++ comments to C ones - * cleaned up a lot of signed/unsigned mistakes - * - * Revision 1.30 2004/06/20 10:09:54 reinelt - * - * 'const'ified the whole source - * - * Revision 1.29 2004/06/06 06:51:59 reinelt - * - * do not display end splash screen if quiet=1 - * - * Revision 1.28 2004/06/05 06:41:39 reinelt - * - * chancged splash screen again - * - * Revision 1.27 2004/06/05 06:13:11 reinelt - * - * splash screen for all text-based display drivers - * - * Revision 1.26 2004/06/02 10:09:22 reinelt - * - * splash screen for HD44780 - * - * Revision 1.25 2004/06/02 09:41:19 reinelt - * - * prepared support for startup splash screen - * - * Revision 1.24 2004/06/01 06:45:29 reinelt - * - * some Fixme's processed - * documented some code - * - * Revision 1.23 2004/05/31 05:38:02 reinelt - * - * fixed possible bugs with user-defined chars (clear high bits) - * thanks to Andy Baxter for debugging the MilfordInstruments driver! - * - * Revision 1.22 2004/05/27 03:39:47 reinelt - * - * changed function naming scheme to plugin::function - * - * Revision 1.21 2004/05/26 11:37:36 reinelt - * - * Curses driver ported. - * - * Revision 1.20 2004/05/22 04:23:49 reinelt - * - * removed 16*x fix again (next time think before commit :-) - * - * Revision 1.19 2004/05/22 04:21:02 reinelt - * - * fix for display RAM layout on 16x4 displays (thanks to toxicated101) - * - * Revision 1.18 2004/03/20 07:31:32 reinelt - * support for HD66712 (which has a different RAM layout) - * further threading development - * - * Revision 1.17 2004/03/19 09:17:46 reinelt - * - * removed the extra 'goto' function, row and col are additional parameters - * of the write() function now. - * - * Revision 1.16 2004/03/11 06:39:58 reinelt - * big patch from Martin: - * - reuse filehandles - * - memory leaks fixed - * - earlier busy-flag checking with HD44780 - * - reuse memory for strings in RESULT and hash - * - netdev_fast to wavid time-consuming regex - * - * Revision 1.15 2004/03/03 03:47:04 reinelt - * big patch from Martin Hejl: - * - use qprintf() where appropriate - * - save CPU cycles on gettimeofday() - * - add quit() functions to free allocated memory - * - fixed lots of memory leaks - * - * Revision 1.14 2004/03/01 04:29:51 reinelt - * cfg_number() returns -1 on error, 0 if value not found (but default val used), - * and 1 if value was used from the configuration. - * HD44780 driver adopted to new cfg_number() - * Crystalfontz 631 driver nearly finished - * - * Revision 1.13 2004/02/15 21:43:43 reinelt - * T6963 driver nearly finished - * framework for graphic displays done - * i2c_sensors patch from Xavier - * some more old generation files removed - * - * Revision 1.12 2004/02/14 11:56:17 reinelt - * M50530 driver ported - * changed lots of 'char' to 'unsigned char' - * - * Revision 1.11 2004/02/04 19:10:51 reinelt - * Crystalfontz driver nearly finished - * - * Revision 1.10 2004/02/02 05:22:16 reinelt - * Brightness fpr Noritake Displays avaliable as a plugin - * - * Revision 1.9 2004/02/01 11:51:22 hejl - * Fixes for busy flag - * - * Revision 1.8 2004/02/01 08:05:12 reinelt - * Crystalfontz 633 extensions (CRC checking and stuff) - * Models table for HD44780 - * Noritake VFD BVrightness patch from Bill Paxton - * - * Revision 1.7 2004/01/30 07:12:35 reinelt - * HD44780 busy-flag support from Martin Hejl - * loadavg() uClibc replacement from Martin Heyl - * round() uClibc replacement from Martin Hejl - * warning in i2c_sensors fixed - * [ - * - * Revision 1.6 2004/01/29 04:40:02 reinelt - * every .c file includes "config.h" now - * - * Revision 1.5 2004/01/23 07:04:17 reinelt - * icons finished! - * - * Revision 1.4 2004/01/23 04:53:48 reinelt - * icon widget added (not finished yet!) - * - * Revision 1.3 2004/01/22 07:57:45 reinelt - * several bugs fixed where segfaulting on layout>display - * Crystalfontz driver optimized, 632 display already works - * - * Revision 1.2 2004/01/21 06:39:27 reinelt - * HD44780 missed the "clear display' sequence - * asc255bug handling added - * HD44780 tested, works here! - * - * Revision 1.1 2004/01/20 15:32:49 reinelt - * first version of Next Generation HD44780 (untested! but it compiles...) - * some cleanup in the other drivers - * - */ - -/* - * - * exported fuctions: - * - * struct DRIVER drv_HD44780 - * - */ - -#include "config.h" - -#include <stdlib.h> -#include <stdio.h> -#include <string.h> -#include <errno.h> -#include <unistd.h> -#include <termios.h> -#include <fcntl.h> -#include <sys/time.h> -#include <sys/ioctl.h> - -#include "debug.h" -#include "cfg.h" -#include "udelay.h" -#include "qprintf.h" -#include "timer.h" -#include "plugin.h" -#include "widget.h" -#include "widget_text.h" -#include "widget_icon.h" -#include "widget_bar.h" -#include "drv.h" -#include "drv_generic_text.h" -#include "drv_generic_parport.h" - -#ifdef WITH_I2C -#include "drv_generic_i2c.h" -#endif - -static char Name[] = "HD44780"; - -static int Bus; -static int Model; -static int Capabilities; - - -/* low level communication timings [nanoseconds] - * as these values differ from spec to spec, - * we use the worst-case values. - */ - -#define T_CYCLE 1000 /* Enable cycle time */ -#define T_PW 450 /* Enable pulse width */ -#define T_AS 60 /* Address setup time */ -#define T_H 40 /* Data hold time */ -#define T_AH 20 /* Address hold time */ - - -/* HD44780 execution timings [microseconds] - * as these values differ from spec to spec, - * we use the worst-case values. - */ - -#define T_INIT1 4100 /* first init sequence: 4.1 msec */ -#define T_INIT2 100 /* second init sequence: 100 usec */ -#define T_EXEC 80 /* normal execution time */ -#define T_WRCG 120 /* CG RAM Write */ -#define T_CLEAR 2250 /* Clear Display */ - - -static int Bits = 0; -static int numControllers = 0; -static int allControllers = 0; -static int currController = 0; - -/* size of every single controller */ -static int CROWS[4]; -static int CCOLS[4]; - -static unsigned char SIGNAL_RW; -static unsigned char SIGNAL_RS; -static unsigned char SIGNAL_ENABLE; -static unsigned char SIGNAL_ENABLE2; -static unsigned char SIGNAL_ENABLE3; -static unsigned char SIGNAL_ENABLE4; -static unsigned char SIGNAL_BACKLIGHT; -static unsigned char SIGNAL_GPO; - -/* maximum time to wait for the busy-flag (in usec) */ -#define MAX_BUSYFLAG_WAIT 10000 - -/* maximum busy flag errors before falling back to busy-waiting */ -#define MAX_BUSYFLAG_ERRORS 20 - -/* flag for busy-waiting vs. busy flag checking */ -static int UseBusy = 0; - - -/* Fixme: GPO's not yet implemented */ -static int GPOS; -/* static int GPO=0; */ - - -typedef struct { - int type; - char *name; - int capabilities; -} MODEL; - -#define CAP_PARPORT (1<<0) -#define CAP_I2C (1<<1) -#define CAP_GPO (1<<2) -#define CAP_BACKLIGHT (1<<3) -#define CAP_BRIGHTNESS (1<<4) -#define CAP_BUSY4BIT (1<<5) -#define CAP_HD66712 (1<<6) -#define CAP_LCM162 (1<<7) - -#define BUS_PP CAP_PARPORT -#define BUS_I2C CAP_I2C - - -static MODEL Models[] = { - {0x01, "generic", CAP_PARPORT | CAP_I2C | CAP_GPO | CAP_BACKLIGHT}, - {0x02, "Noritake", CAP_PARPORT | CAP_I2C | CAP_GPO | CAP_BRIGHTNESS}, - {0x03, "Soekris", CAP_PARPORT | CAP_BUSY4BIT}, - {0x04, "HD66712", CAP_PARPORT | CAP_I2C | CAP_GPO | CAP_BACKLIGHT | CAP_HD66712}, - {0x05, "LCM-162", CAP_PARPORT | CAP_LCM162}, - {0xff, "Unknown", 0} -}; - - -/****************************************/ -/*** generic functions ***/ -/****************************************/ - -static int (*drv_HD_load) (const char *section); -static void (*drv_HD_command) (const unsigned char controller, const unsigned char cmd, const int delay); -static void (*drv_HD_data) (const unsigned char controller, const char *string, const int len, const int delay); -static void (*drv_HD_stop) (void); - - - -/****************************************/ -/*** parport dependant functions ***/ -/****************************************/ - -static void drv_HD_PP_busy(const int controller) -{ - static unsigned int errors = 0; - - unsigned char enable; - unsigned char data = 0xFF; - unsigned char busymask; - unsigned char ctrlmask; - unsigned int counter; - - if (Bits == 8) { - busymask = 0x80; - } else { - /* Since in 4-Bit mode DB0 on the parport is mapped to DB4 on the LCD - * (and consequently, DB3 on the partport is mapped to DB7 on the LCD) - * we need to listen for DB3 on the parport to go low - */ - busymask = 0x08; - } - - ctrlmask = 0x08; - while (ctrlmask > 0) { - - if (controller & ctrlmask) { - - enable = 0; - if (ctrlmask & 0x01) - enable = SIGNAL_ENABLE; - else if (ctrlmask & 0x02) - enable = SIGNAL_ENABLE2; - else if (ctrlmask & 0x04) - enable = SIGNAL_ENABLE3; - else if (ctrlmask & 0x08) - enable = SIGNAL_ENABLE4; - - /* set data-lines to input */ - drv_generic_parport_direction(1); - - if (Bits == 8) { - /* Set RW, clear RS */ - drv_generic_parport_control(SIGNAL_RW | SIGNAL_RS, SIGNAL_RW); - } else { - drv_generic_parport_data(SIGNAL_RW); - } - - /* Address set-up time */ - ndelay(T_AS); - - /* rise ENABLE */ - if (Bits == 8) { - drv_generic_parport_control(enable, enable); - } else { - drv_generic_parport_data(SIGNAL_RW | enable); - } - - counter = 0; - while (1) { - /* read the busy flag */ - data = drv_generic_parport_read(); - if ((data & busymask) == 0) { - errors = 0; - break; - } - - /* make sure we don't wait forever - * - but only check after 5 iterations - * that way, we won't slow down normal mode - * (where we don't need the timeout anyway) - */ - counter++; - - if (counter >= 5) { - struct timeval now, end; - - if (counter == 5) { - /* determine the time when the timeout has expired */ - gettimeofday(&end, NULL); - end.tv_usec += MAX_BUSYFLAG_WAIT; - while (end.tv_usec > 1000000) { - end.tv_usec -= 1000000; - end.tv_sec++; - } - } - - /* get the current time */ - gettimeofday(&now, NULL); - if (now.tv_sec == end.tv_sec ? now.tv_usec >= end.tv_usec : now.tv_sec >= end.tv_sec) { - error("%s: timeout waiting for busy flag on controller %x (%x)", Name, ctrlmask, data); - if (++errors >= MAX_BUSYFLAG_ERRORS) { - error("%s: too many busy flag failures, turning off busy flag checking.", Name); - UseBusy = 0; - } - break; - } - } - } - - /* RS=low, RW=low, EN=low */ - if (Bits == 8) { - /* Lower EN */ - drv_generic_parport_control(enable, 0); - - /* Address hold time */ - ndelay(T_AH); - - drv_generic_parport_control(SIGNAL_RW | SIGNAL_RS, 0); - } else { - /* Lower EN */ - drv_generic_parport_data(SIGNAL_RW); - ndelay(T_AH); - drv_generic_parport_data(0); - } - - /* set data-lines to output */ - drv_generic_parport_direction(0); - } - ctrlmask >>= 1; - } -} - - -static void drv_HD_PP_nibble(const unsigned char controller, const unsigned char nibble) -{ - unsigned char enable; - - /* enable signal: 'controller' is a bitmask */ - /* bit n .. send to controller #n */ - /* so we can send a byte to more controllers at the same time! */ - enable = 0; - if (controller & 0x01) - enable |= SIGNAL_ENABLE; - if (controller & 0x02) - enable |= SIGNAL_ENABLE2; - if (controller & 0x04) - enable |= SIGNAL_ENABLE3; - if (controller & 0x08) - enable |= SIGNAL_ENABLE4; - - /* clear ENABLE */ - /* put data on DB1..DB4 */ - /* nibble already contains RS bit! */ - drv_generic_parport_data(nibble); - - /* Address set-up time */ - ndelay(T_AS); - - /* rise ENABLE */ - drv_generic_parport_data(nibble | enable); - - /* Enable pulse width */ - ndelay(T_PW); - - /* lower ENABLE */ - drv_generic_parport_data(nibble); -} - - -static void drv_HD_PP_byte(const unsigned char controller, const unsigned char data, const unsigned char RS) -{ - /* send high nibble of the data */ - drv_HD_PP_nibble(controller, ((data >> 4) & 0x0f) | RS); - - /* Make sure we honour T_CYCLE */ - ndelay(T_CYCLE - T_AS - T_PW); - - /* send low nibble of the data */ - drv_HD_PP_nibble(controller, (data & 0x0f) | RS); -} - - -static void drv_HD_PP_command(const unsigned char controller, const unsigned char cmd, const int delay) -{ - unsigned char enable; - - if (UseBusy) - drv_HD_PP_busy(controller); - - if (Bits == 8) { - - /* enable signal: 'controller' is a bitmask */ - /* bit n .. send to controller #n */ - /* so we can send a byte to more controllers at the same time! */ - enable = 0; - if (controller & 0x01) - enable |= SIGNAL_ENABLE; - if (controller & 0x02) - enable |= SIGNAL_ENABLE2; - if (controller & 0x04) - enable |= SIGNAL_ENABLE3; - if (controller & 0x08) - enable |= SIGNAL_ENABLE4; - - /* put data on DB1..DB8 */ - drv_generic_parport_data(cmd); - - /* clear RW and RS */ - drv_generic_parport_control(SIGNAL_RW | SIGNAL_RS, 0); - - /* Address set-up time */ - ndelay(T_AS); - - /* send command */ - drv_generic_parport_toggle(enable, 1, T_PW); - - } else { - - drv_HD_PP_byte(controller, cmd, 0); - - } - - /* wait for command completion */ - if (!UseBusy) - udelay(delay); - -} - - -static void drv_HD_PP_data(const unsigned char controller, const char *string, const int len, const int delay) -{ - int l = len; - unsigned char enable; - - /* sanity check */ - if (len <= 0) - return; - - if (Bits == 8) { - - /* enable signal: 'controller' is a bitmask */ - /* bit n .. send to controller #n */ - /* so we can send a byte to more controllers at the same time! */ - enable = 0; - if (controller & 0x01) - enable |= SIGNAL_ENABLE; - if (controller & 0x02) - enable |= SIGNAL_ENABLE2; - if (controller & 0x04) - enable |= SIGNAL_ENABLE3; - if (controller & 0x08) - enable |= SIGNAL_ENABLE4; - - if (!UseBusy) { - /* clear RW, set RS */ - drv_generic_parport_control(SIGNAL_RW | SIGNAL_RS, SIGNAL_RS); - /* Address set-up time */ - ndelay(T_AS); - } - - while (l--) { - - if (UseBusy) { - drv_HD_PP_busy(controller); - /* clear RW, set RS */ - drv_generic_parport_control(SIGNAL_RW | SIGNAL_RS, SIGNAL_RS); - /* Address set-up time */ - ndelay(T_AS); - } - - /* put data on DB1..DB8 */ - drv_generic_parport_data(*(string++)); - - /* send command */ - drv_generic_parport_toggle(enable, 1, T_PW); - - /* wait for command completion */ - if (!UseBusy) - udelay(delay); - } - - } else { /* 4 bit mode */ - - while (l--) { - if (UseBusy) - drv_HD_PP_busy(controller); - - /* send data with RS enabled */ - drv_HD_PP_byte(controller, *(string++), SIGNAL_RS); - - /* wait for command completion */ - if (!UseBusy) - udelay(delay); - } - } -} - - -static int drv_HD_PP_load(const char *section) -{ - if (cfg_number(section, "Bits", 8, 4, 8, &Bits) < 0) - return -1; - - if (Bits != 4 && Bits != 8) { - error("%s: bad %s.Bits '%d' from %s, should be '4' or '8'", Name, section, Bits, cfg_source()); - return -1; - } - - /* LCM-162 only supports 8-bit-mode */ - if (Capabilities & CAP_LCM162 && Bits != 8) { - error("%s: Model '%s' does not support %d bit mode!", Name, Models[Model].name, Bits); - Bits = 8; - } - info("%s: using %d bit mode", Name, Bits); - - if (drv_generic_parport_open(section, Name) != 0) { - error("%s: could not initialize parallel port!", Name); - return -1; - } - - /* Soft-Wiring */ - if (Capabilities & CAP_LCM162) { - /* the LCM-162 is hardwired */ - if ((SIGNAL_RS = drv_generic_parport_hardwire_ctrl("RS", "SLCTIN")) == 0xff) - return -1; - if ((SIGNAL_RW = drv_generic_parport_hardwire_ctrl("RW", "INIT")) == 0xff) - return -1; - if ((SIGNAL_ENABLE = drv_generic_parport_hardwire_ctrl("ENABLE", "AUTOFD")) == 0xff) - return -1; - if ((SIGNAL_ENABLE2 = drv_generic_parport_hardwire_ctrl("ENABLE2", "GND")) == 0xff) - return -1; - if ((SIGNAL_ENABLE3 = drv_generic_parport_hardwire_ctrl("ENABLE3", "GND")) == 0xff) - return -1; - if ((SIGNAL_ENABLE4 = drv_generic_parport_hardwire_ctrl("ENABLE4", "GND")) == 0xff) - return -1; - if ((SIGNAL_BACKLIGHT = drv_generic_parport_hardwire_ctrl("BACKLIGHT", "GND")) == 0xff) - return -1; - if ((SIGNAL_GPO = drv_generic_parport_hardwire_ctrl("GPO", "GND")) == 0xff) - return -1; - } else { - if (Bits == 8) { - if ((SIGNAL_RS = drv_generic_parport_wire_ctrl("RS", "AUTOFD")) == 0xff) - return -1; - if ((SIGNAL_RW = drv_generic_parport_wire_ctrl("RW", "GND")) == 0xff) - return -1; - if ((SIGNAL_ENABLE = drv_generic_parport_wire_ctrl("ENABLE", "STROBE")) == 0xff) - return -1; - if ((SIGNAL_ENABLE2 = drv_generic_parport_wire_ctrl("ENABLE2", "GND")) == 0xff) - return -1; - if ((SIGNAL_ENABLE3 = drv_generic_parport_wire_ctrl("ENABLE3", "GND")) == 0xff) - return -1; - if ((SIGNAL_ENABLE4 = drv_generic_parport_wire_ctrl("ENABLE4", "GND")) == 0xff) - return -1; - } else { - if ((SIGNAL_RS = drv_generic_parport_wire_data("RS", "DB4")) == 0xff) - return -1; - if ((SIGNAL_RW = drv_generic_parport_wire_data("RW", "DB5")) == 0xff) - return -1; - if ((SIGNAL_ENABLE = drv_generic_parport_wire_data("ENABLE", "DB6")) == 0xff) - return -1; - if ((SIGNAL_ENABLE2 = drv_generic_parport_wire_data("ENABLE2", "GND")) == 0xff) - return -1; - if ((SIGNAL_ENABLE3 = drv_generic_parport_wire_data("ENABLE3", "GND")) == 0xff) - return -1; - if ((SIGNAL_ENABLE4 = drv_generic_parport_wire_data("ENABLE4", "GND")) == 0xff) - return -1; - } - /* backlight and GPO are always control signals */ - if ((SIGNAL_BACKLIGHT = drv_generic_parport_wire_ctrl("BACKLIGHT", "GND")) == 0xff) - return -1; - if ((SIGNAL_GPO = drv_generic_parport_wire_ctrl("GPO", "GND")) == 0xff) - return -1; - } - - /* clear capabilities if corresponding signal is GND */ - if (SIGNAL_BACKLIGHT == 0) { - Capabilities &= ~CAP_BACKLIGHT; - } - if (SIGNAL_GPO == 0) { - Capabilities &= ~CAP_GPO; - } - - - /* clear all signals */ - if (Bits == 8) { - drv_generic_parport_control(SIGNAL_RS | - SIGNAL_RW | SIGNAL_ENABLE | SIGNAL_ENABLE2 | SIGNAL_ENABLE3 | SIGNAL_ENABLE4 | SIGNAL_BACKLIGHT | SIGNAL_GPO, 0); - } else { - drv_generic_parport_data(0); - } - - /* set direction: write */ - drv_generic_parport_direction(0); - - /* initialize *all* controllers */ - if (Bits == 8) { - drv_HD_PP_command(allControllers, 0x30, T_INIT1); /* 8 Bit mode, wait 4.1 ms */ - drv_HD_PP_command(allControllers, 0x30, T_INIT2); /* 8 Bit mode, wait 100 us */ - drv_HD_PP_command(allControllers, 0x38, T_EXEC); /* 8 Bit mode, 1/16 duty cycle, 5x8 font */ - } else { - drv_HD_PP_nibble(allControllers, 0x03); - udelay(T_INIT1); /* 4 Bit mode, wait 4.1 ms */ - drv_HD_PP_nibble(allControllers, 0x03); - udelay(T_INIT2); /* 4 Bit mode, wait 100 us */ - drv_HD_PP_nibble(allControllers, 0x03); - udelay(T_INIT1); /* 4 Bit mode, wait 4.1 ms */ - drv_HD_PP_nibble(allControllers, 0x02); - udelay(T_INIT2); /* 4 Bit mode, wait 100 us */ - drv_HD_PP_command(allControllers, 0x28, T_EXEC); /* 4 Bit mode, 1/16 duty cycle, 5x8 font */ - } - - /* maybe use busy-flag from now on */ - /* (we can't use the busy flag during the init sequence) */ - cfg_number(section, "UseBusy", 0, 0, 1, &UseBusy); - - /* make sure we don't use the busy flag with RW wired to GND */ - if (UseBusy && !SIGNAL_RW) { - error("%s: busy-flag checking is impossible with RW wired to GND!", Name); - UseBusy = 0; - } - - /* make sure the display supports busy-flag checking in 4-Bit-Mode */ - /* at the moment this is inly possible with Martin Hejl's gpio driver, */ - /* which allows to use 4 bits as input and 4 bits as output */ - if (UseBusy && Bits == 4 && !(Capabilities & CAP_BUSY4BIT)) { - error("%s: Model '%s' does not support busy-flag checking in 4 bit mode", Name, Models[Model].name); - UseBusy = 0; - } - - info("%s: %susing busy-flag checking", Name, UseBusy ? "" : "not "); - - /* The LCM-162 should really use BusyFlag checking */ - if (!UseBusy && (Capabilities & CAP_LCM162)) { - error("%s: Model '%s' should definitely use busy-flag checking!", Name, Models[Model].name); - } - - return 0; -} - - -static void drv_HD_PP_stop(void) -{ - /* clear all signals */ - if (Bits == 8) { - drv_generic_parport_control(SIGNAL_RS | - SIGNAL_RW | SIGNAL_ENABLE | SIGNAL_ENABLE2 | SIGNAL_ENABLE3 | SIGNAL_ENABLE4 | SIGNAL_BACKLIGHT | SIGNAL_GPO, 0); - } else { - drv_generic_parport_data(0); - } - - drv_generic_parport_close(); - -} - - - -/****************************************/ -/*** i2c dependant functions ***/ -/****************************************/ - -#ifdef WITH_I2C - -static void drv_HD_I2C_nibble(unsigned char controller, unsigned char nibble) -{ - unsigned char enable; - - /* enable signal: 'controller' is a bitmask */ - /* bit n .. send to controller #n */ - /* so we can send a byte to more controllers at the same time! */ - enable = 0; - if (controller & 0x01) - enable |= SIGNAL_ENABLE; - if (controller & 0x02) - enable |= SIGNAL_ENABLE2; - if (controller & 0x04) - enable |= SIGNAL_ENABLE3; - if (controller & 0x08) - enable |= SIGNAL_ENABLE4; - - - /* clear ENABLE */ - /* put data on DB1..DB4 */ - /* nibble already contains RS bit! */ - drv_generic_i2c_data(nibble); - - /* Address set-up time */ - ndelay(T_AS); - - /* rise ENABLE */ - drv_generic_i2c_data(nibble | enable); - - /* Enable pulse width */ - ndelay(T_PW); - - /* lower ENABLE */ - drv_generic_i2c_data(nibble); - - /* Address hold time */ - ndelay(T_H); -} - - -static void drv_HD_I2C_byte(const unsigned char controller, const unsigned char data) -{ - /* send data with RS disabled */ - /* send high nibble of the data */ - drv_HD_I2C_nibble(controller, ((data >> 4) & 0x0f) | SIGNAL_RS); - - /* Make sure we honour T_CYCLE */ - ndelay(T_CYCLE - T_AS - T_PW); - - /* send low nibble of the data */ - drv_HD_I2C_nibble(controller, (data & 0x0f) | SIGNAL_RS); -} - - -static void drv_HD_I2C_command(const unsigned char controller, const unsigned char cmd, const int delay) -{ - /* send data with RS disabled */ - drv_HD_I2C_nibble(controller, ((cmd >> 4) & 0x0f)); - - ndelay(T_CYCLE - T_AS - T_PW); - - drv_HD_I2C_nibble(controller, ((cmd) & 0x0f)); - - /* wait for command completion */ - udelay(delay); -} - -static void drv_HD_I2C_data(const unsigned char controller, const char *string, const int len, const int delay) -{ - int l = len; - - /* sanity check */ - if (len <= 0) - return; - - while (l--) { - /* send data with RS enabled */ - drv_HD_I2C_byte(controller, *(string++)); - - /* wait for command completion */ - udelay(delay); - } -} - - -static int drv_HD_I2C_load(const char *section) -{ - if (cfg_number(section, "Bits", 8, 4, 8, &Bits) < 0) - return -1; - if (Bits != 4) { - error("%s: bad %s.Bits '%d' from %s, should be '4'", Name, section, Bits, cfg_source()); - return -1; - } - - info("%s: using %d bit mode", Name, Bits); - - if (drv_generic_i2c_open(section, Name) != 0) { - error("%s: could not initialize i2c attached device!", Name); - return -1; - } - - if ((SIGNAL_RS = drv_generic_i2c_wire("RS", "DB4")) == 0xff) - return -1; - if ((SIGNAL_RW = drv_generic_i2c_wire("RW", "DB5")) == 0xff) - return -1; - if ((SIGNAL_ENABLE = drv_generic_i2c_wire("ENABLE", "DB6")) == 0xff) - return -1; - if ((SIGNAL_ENABLE2 = drv_generic_i2c_wire("ENABLE2", "GND")) == 0xff) - return -1; - if ((SIGNAL_GPO = drv_generic_i2c_wire("GPO", "GND")) == 0xff) - return -1; - - /* initialize display */ - drv_HD_I2C_nibble(allControllers, 0x03); - udelay(T_INIT1); /* 4 Bit mode, wait 4.1 ms */ - drv_HD_I2C_nibble(allControllers, 0x03); - udelay(T_INIT2); /* 4 Bit mode, wait 100 us */ - drv_HD_I2C_nibble(allControllers, 0x03); - udelay(T_INIT2); /* 4 Bit mode, wait 4.1 ms */ - drv_HD_I2C_nibble(allControllers, 0x02); - udelay(T_INIT2); /* 4 Bit mode, wait 100 us */ - drv_HD_I2C_command(allControllers, 0x28, T_EXEC); /* 4 Bit mode, 1/16 duty cycle, 5x8 font */ - - info("%s: I2C initialization done", Name); - - return 0; -} - - -static void drv_HD_I2C_stop(void) -{ - /* clear all signals */ - drv_generic_i2c_data(0); - - /* close port */ - drv_generic_i2c_close(); -} - -#endif /* WITH_I2C */ - - -/****************************************/ -/*** display dependant functions ***/ -/****************************************/ - -static void drv_HD_clear(void) -{ - drv_HD_command(allControllers, 0x01, T_CLEAR); /* clear *all* displays */ -} - - -static int drv_HD_goto(int row, int col) -{ - int pos, controller; - - /* handle multiple controllers */ - for (pos = 0, controller = 0; controller < numControllers; controller++) { - pos += CROWS[controller]; - if (row < pos) { - currController = (1 << controller); - break; - } - row -= CROWS[controller]; - } - - /* column outside of current display's width */ - if (col >= CCOLS[controller]) - return -1; - - if (0) { - debug("goto: [%d,%d] mask=%d, controller=%d, size:%dx%d", row, col, currController, controller, CROWS[controller], CCOLS[controller]); - } - - /* 16x1 Displays are organized as 8x2 :-( */ - if (CCOLS[controller] == 16 && CROWS[controller] == 1 && col > 7) { - row++; - col -= 8; - } - - if (Capabilities & CAP_HD66712) { - /* the HD66712 doesn't have a braindamadged RAM layout */ - pos = row * 32 + col; - } else { - /* 16x4 Controllers use a slightly different layout */ - if (CCOLS[controller] == 16 && CROWS[controller] == 4) { - pos = (row % 2) * 64 + (row / 2) * 16 + col; - } else { - pos = (row % 2) * 64 + (row / 2) * 20 + col; - } - } - drv_HD_command(currController, (0x80 | pos), T_EXEC); - - /* return columns left on current display */ - return CCOLS[controller] - col; - -} - - -static void drv_HD_write(const int row, const int col, const char *data, const int len) -{ - int space = drv_HD_goto(row, col); - if (space > 0) { - drv_HD_data(currController, data, len > space ? space : len, T_EXEC); - } -} - - -static void drv_HD_defchar(const int ascii, const unsigned char *matrix) -{ - int i; - char buffer[8]; - - for (i = 0; i < 8; i++) { - buffer[i] = matrix[i] & 0x1f; - } - - /* define chars on *all* controllers! */ - drv_HD_command(allControllers, 0x40 | 8 * ascii, T_EXEC); - drv_HD_data(allControllers, buffer, 8, T_WRCG); -} - - -static int drv_HD_backlight(int backlight) -{ - if (!(Capabilities & CAP_BACKLIGHT)) - return -1; - - if (backlight < 0) - backlight = 0; - if (backlight > 1) - backlight = 1; - - drv_generic_parport_control(SIGNAL_BACKLIGHT, backlight ? SIGNAL_BACKLIGHT : 0); - - return backlight; -} - - -static int drv_HD_brightness(int brightness) -{ - char cmd; - - if (!(Capabilities & CAP_BRIGHTNESS)) - return -1; - - if (brightness < 0) - brightness = 0; - if (brightness > 3) - brightness = 3; - - cmd = '0' + brightness; - - drv_HD_command(allControllers, 0x38, T_EXEC); /* enable function */ - drv_HD_data(allControllers, &cmd, 1, T_WRCG); /* set brightness */ - - return brightness; -} - - -/* Fixme: GPO's */ -#if 0 -static void drv_HD_setGPO(const int bits) -{ - if (Lcd.gpos > 0) { - - /* put data on DB1..DB8 */ - drv_generic_parport_data(bits); - - /* 74HCT573 set-up time */ - ndelay(20); - - /* send data */ - /* 74HCT573 enable pulse width = 24ns */ - drv_generic_parport_toggle(SIGNAL_GPO, 1, 230); - } -} -#endif - - -static void drv_HD_LCM162_timer(void __attribute__ ((unused)) * notused) -{ - static unsigned char data = 0x00; - - /* Bit 3+5 : key number */ - /* Bit 6 : key press/release */ - unsigned char mask3 = 1 << 3; - unsigned char mask5 = 1 << 5; - unsigned char mask6 = 1 << 6; - unsigned char mask = mask3 | mask5 | mask6; - - int keynum; - int updown; - - unsigned char temp; - - temp = drv_generic_parport_status() & mask; - - if (data != temp) { - data = temp; - - keynum = (data & mask3 ? 1 : 0) + (data & mask5 ? 2 : 0); - updown = (data & mask6 ? 1 : 0); - - debug("key %d press %d", keynum, updown); - } -} - - -static int drv_HD_start(const char *section, const int quiet) -{ - char *model, *size, *bus; - int rows = -1, cols = -1, gpos = -1, i; - int size_defined = 0; - int size_missing = 0; - - model = cfg_get(section, "Model", "generic"); - if (model != NULL && *model != '\0') { - int i; - for (i = 0; Models[i].type != 0xff; i++) { - if (strcasecmp(Models[i].name, model) == 0) - break; - } - if (Models[i].type == 0xff) { - error("%s: %s.Model '%s' is unknown from %s", Name, section, model, cfg_source()); - return -1; - } - Model = i; - Capabilities = Models[Model].capabilities; - info("%s: using model '%s'", Name, Models[Model].name); - } else { - error("%s: empty '%s.Model' entry from %s", Name, section, cfg_source()); - if (model) - free(model); - return -1; - } - free(model); - - bus = cfg_get(section, "Bus", "parport"); - if (bus == NULL && *bus == '\0') { - error("%s: empty '%s.Bus' entry from %s", Name, section, cfg_source()); - if (bus) - free(bus); - return -1; - } - - if (strcasecmp(bus, "parport") == 0) { - info("%s: using parallel port", Name); - Bus = BUS_PP; - drv_HD_load = drv_HD_PP_load; - drv_HD_command = drv_HD_PP_command; - drv_HD_data = drv_HD_PP_data; - drv_HD_stop = drv_HD_PP_stop; - - } else if (strcasecmp(bus, "i2c") == 0) { -#ifdef WITH_I2C - info("%s: using I2C bus", Name); - Bus = BUS_I2C; - drv_HD_load = drv_HD_I2C_load; - drv_HD_command = drv_HD_I2C_command; - drv_HD_data = drv_HD_I2C_data; - drv_HD_stop = drv_HD_I2C_stop; -#else - error("%s: %s.Bus '%s' from %s not available:", Name, section, bus, cfg_source()); - error("%s: lcd4linux was compiled without i2c support!", Name); - free(bus); - return -1; -#endif - - } else { - error("%s: bad %s.Bus '%s' from %s, should be 'parport' or 'i2c'", Name, section, bus, cfg_source()); - free(bus); - return -1; - } - - /* sanity check: Model can use bus */ - if (!(Capabilities & Bus)) { - error("%s: Model '%s' cannot be used on the %s bus!", Name, Models[Model].name, bus); - free(bus); - return -1; - } - free(bus); - - if (cfg_number(section, "Controllers", 1, 1, 4, (int *) &numControllers) < 0) - return -1; - info("%s: using %d Controller(s)", Name, numControllers); - - /* current Controller */ - currController = 1; - - /* Bitmask for *all* Controllers */ - allControllers = (1 << numControllers) - 1; - - - DCOLS = 0; - DROWS = 0; - - for (i = 0; i < numControllers; i++) { - char key[6]; - qprintf(key, sizeof(key), "Size%d", i + 1); - size = cfg_get(section, key, NULL); - if (size == NULL || *size == '\0') { - size_missing++; - free(size); - continue; - } - if (sscanf(size, "%dx%d", &cols, &rows) != 2 || rows < 1 || cols < 1) { - error("%s: bad %s.%s '%s' from %s", Name, section, key, size, cfg_source()); - free(size); - return -1; - } - free(size); - CCOLS[i] = cols; - CROWS[i] = rows; - size_defined++; - info("%s: Controller %d: %dx%d", Name, i + 1, cols, rows); - /* grow the size */ - if (cols > DCOLS) - DCOLS = cols; - DROWS += rows; - } - if (size_defined && size_missing) { - error("%s: bad %s.Size* definition in %s:", Name, section, cfg_source()); - error("%s: either you specify the size for *all* controllers or for none.", Name); - return -1; - } - - size = cfg_get(section, "Size", NULL); - if (size != NULL && *size != '\0') { - if (sscanf(size, "%dx%d", &cols, &rows) != 2 || rows < 1 || cols < 1) { - error("%s: bad %s.Size '%s' from %s", Name, section, size, cfg_source()); - free(size); - return -1; - } - if (DCOLS == 0 && DROWS == 0) { - for (i = 0; i < numControllers; i++) { - CCOLS[i] = cols; - CROWS[i] = rows / numControllers; - DCOLS = CCOLS[i]; - DROWS += CROWS[i]; - } - } - if (rows != DROWS || cols != DCOLS) { - error("%s: bad %s.Size definition in %s:", Name, section, cfg_source()); - error("%s: Size %dx%d should be %dx%d", Name, cols, rows, DCOLS, DROWS); - return -1; - } - } - free(size); - - - if (cfg_number(section, "GPOs", 0, 0, 8, &gpos) < 0) - return -1; - if (gpos > 0 && !(Capabilities & CAP_GPO)) { - error("%s: Model '%s' does not support GPO's!", Name, Models[Model].name); - gpos = 0; - } - GPOS = gpos; - if (gpos > 0) { - info("%s: using %d GPO's", Name, GPOS); - } - - if (drv_HD_load(section) < 0) { - error("%s: start display failed!", Name); - return -1; - } - - drv_HD_command(allControllers, 0x08, T_EXEC); /* Controller off, cursor off, blink off */ - drv_HD_command(allControllers, 0x0c, T_CLEAR); /* Display on, cursor off, blink off, wait 1.64 ms */ - drv_HD_command(allControllers, 0x06, T_EXEC); /* curser moves to right, no shift */ - - if ((Capabilities & CAP_HD66712) && DROWS > 2) { - drv_HD_command(allControllers, Bits == 8 ? 0x3c : 0x2c, T_EXEC); /* set extended register enable bit */ - drv_HD_command(allControllers, 0x09, T_EXEC); /* set 4-line mode */ - drv_HD_command(allControllers, Bits == 8 ? 0x38 : 0x28, T_EXEC); /* clear extended register enable bit */ - } - - drv_HD_clear(); /* clear *all* displays */ - drv_HD_command(allControllers, 0x03, T_CLEAR); /* return home */ - - /* maybe set backlight */ - if (Capabilities & CAP_BACKLIGHT) { - int backlight; - if (cfg_number(section, "Backlight", 0, 0, 1, &backlight) > 0) { - info("%s: backlight %s", Name, backlight ? "enabled" : "disabled"); - drv_HD_backlight(backlight); - } - } - - /* maybe set brightness */ - if (Capabilities & CAP_BRIGHTNESS) { - int brightness; - if (cfg_number(section, "Brightness", 0, 0, 3, &brightness) > 0) { - info("%s: brightness level %d", Name, brightness); - drv_HD_brightness(brightness); - } - } - - /* install keypad polling timer for LCM-162 */ - if (Capabilities & CAP_LCM162) { - timer_add(drv_HD_LCM162_timer, NULL, 10, 0); - } - - if (!quiet) { - char buffer[40]; - qprintf(buffer, sizeof(buffer), "%s %dx%d", Name, DCOLS, DROWS); - if (drv_generic_text_greet(buffer, NULL)) { - sleep(3); - drv_HD_clear(); - } - } - - return 0; -} - - -/****************************************/ -/*** plugins ***/ -/****************************************/ - - -static void plugin_backlight(RESULT * result, RESULT * arg1) -{ - double backlight; - - backlight = drv_HD_backlight(R2N(arg1)); - SetResult(&result, R_NUMBER, &backlight); -} - - -static void plugin_brightness(RESULT * result, RESULT * arg1) -{ - double brightness; - - brightness = drv_HD_brightness(R2N(arg1)); - SetResult(&result, R_NUMBER, &brightness); -} - - -/****************************************/ -/*** widget callbacks ***/ -/****************************************/ - - -/* using drv_generic_text_draw(W) */ -/* using drv_generic_text_icon_draw(W) */ -/* using drv_generic_text_bar_draw(W) */ - - -/****************************************/ -/*** exported functions ***/ -/****************************************/ - - -/* list models */ -int drv_HD_list(void) -{ - int i; - - for (i = 0; Models[i].type != 0xff; i++) { - printf("%s ", Models[i].name); - } - return 0; -} - - -/* initialize driver & display */ -int drv_HD_init(const char *section, const int quiet) -{ - WIDGET_CLASS wc; - int asc255bug; - int ret; - - /* display preferences */ - XRES = 5; /* pixel width of one char */ - YRES = 8; /* pixel height of one char */ - CHARS = 8; /* number of user-defineable characters */ - CHAR0 = 0; /* ASCII of first user-defineable char */ - GOTO_COST = 1; /* number of bytes a goto command requires */ - - /* real worker functions */ - drv_generic_text_real_write = drv_HD_write; - drv_generic_text_real_defchar = drv_HD_defchar; - - - /* start display */ - if ((ret = drv_HD_start(section, quiet)) != 0) - return ret; - - /* initialize generic text driver */ - if ((ret = drv_generic_text_init(section, Name)) != 0) - return ret; - - /* initialize generic icon driver */ - if ((ret = drv_generic_text_icon_init()) != 0) - return ret; - - /* initialize generic bar driver */ - if ((ret = drv_generic_text_bar_init(0)) != 0) - return ret; - - /* add fixed chars to the bar driver */ - /* most displays have a full block on ascii 255, but some have kind of */ - /* an 'inverted P'. If you specify 'asc255bug 1 in the config, this */ - /* char will not be used, but rendered by the bar driver */ - cfg_number(section, "asc255bug", 0, 0, 1, &asc255bug); - drv_generic_text_bar_add_segment(0, 0, 255, 32); /* ASCII 32 = blank */ - if (!asc255bug) - drv_generic_text_bar_add_segment(255, 255, 255, 255); /* ASCII 255 = block */ - - /* register text widget */ - wc = Widget_Text; - wc.draw = drv_generic_text_draw; - widget_register(&wc); - - /* register icon widget */ - wc = Widget_Icon; - wc.draw = drv_generic_text_icon_draw; - widget_register(&wc); - - /* register bar widget */ - wc = Widget_Bar; - wc.draw = drv_generic_text_bar_draw; - widget_register(&wc); - - /* register plugins */ - if (Capabilities & CAP_BACKLIGHT) { - AddFunction("LCD::backlight", 1, plugin_backlight); - } - if (Capabilities & CAP_BRIGHTNESS) { - AddFunction("LCD::brightness", 1, plugin_brightness); - } - - return 0; -} - - -/* close driver & display */ -int drv_HD_quit(const int quiet) -{ - - info("%s: shutting down.", Name); - - drv_generic_text_quit(); - - /* clear display */ - drv_HD_clear(); - - /* say goodbye... */ - if (!quiet) { - drv_generic_text_greet("goodbye!", NULL); - } - - drv_HD_stop(); - - return (0); -} - - -DRIVER drv_HD44780 = { - name:Name, - list:drv_HD_list, - init:drv_HD_init, - quit:drv_HD_quit, -}; + * Revision 1.50 2005/05/31 20:42:55 lfcorreia + * new file: lcd4linux_i2c.h + * avoid the problems detecting the proper I2C kernel include files + * + * rearrange all the other autoconf stuff to remove I2C detection + * + * new method by Paul Kamphuis to write to the I2C device + *
+ * Revision 1.49 2005/05/08 04:32:44 reinelt
+ * CodingStyle added and applied
+ *
+ * Revision 1.48 2005/05/05 08:36:12 reinelt
+ * changed SELECT to SLCTIN
+ *
+ * Revision 1.47 2005/03/28 22:29:23 reinelt
+ * HD44780 multiple displays patch from geronet
+ *
+ * Revision 1.46 2005/03/28 19:39:23 reinelt
+ * HD44780/I2C patch from Luis merged (still does not work for me)
+ *
+ * Revision 1.45 2005/03/25 15:44:43 reinelt
+ * HD44780 Backlight fixed (thanks to geronet)
+ *
+ * Revision 1.44 2005/01/29 09:30:56 reinelt
+ * minor HD44780 cleanups
+ *
+ * Revision 1.43 2005/01/18 06:30:23 reinelt
+ * added (C) to all copyright statements
+ *
+ * Revision 1.42 2005/01/17 06:38:48 reinelt
+ * info about backlight and brightness
+ *
+ * Revision 1.41 2005/01/17 06:29:24 reinelt
+ * added software-controlled backlight support to HD44780
+ *
+ * Revision 1.40 2004/11/30 05:01:25 reinelt
+ * removed compiler warnings for deactivated i2c bus
+ *
+ * Revision 1.39 2004/10/17 09:24:31 reinelt
+ * I2C support for HD44780 displays by Luis (does not work by now)
+ *
+ * Revision 1.38 2004/09/19 09:31:19 reinelt
+ * HD44780 busy flag checking improved: fall back to busy-waiting if too many errors occur
+ *
+ * Revision 1.37 2004/09/18 15:58:57 reinelt
+ * even more HD44780 cleanups, hardwiring for LCM-162
+ *
+ * Revision 1.36 2004/09/18 10:57:29 reinelt
+ * more parport/i2c cleanups
+ *
+ * Revision 1.35 2004/09/18 09:48:29 reinelt
+ * HD44780 cleanup and prepararation for I2C backend
+ * LCM-162 submodel framework
+ *
+ * Revision 1.34 2004/09/18 08:22:59 reinelt
+ * drv_generic_parport_status() to read status lines
+ *
+ * Revision 1.33 2004/08/29 13:03:41 reinelt
+ *
+ * added RouterBoard driver
+ *
+ * Revision 1.32 2004/06/26 12:04:59 reinelt
+ *
+ * uh-oh... the last CVS log message messed up things a lot...
+ *
+ * Revision 1.31 2004/06/26 09:27:20 reinelt
+ *
+ * added '-W' to CFLAGS
+ * changed all C++ comments to C ones
+ * cleaned up a lot of signed/unsigned mistakes
+ *
+ * Revision 1.30 2004/06/20 10:09:54 reinelt
+ *
+ * 'const'ified the whole source
+ *
+ * Revision 1.29 2004/06/06 06:51:59 reinelt
+ *
+ * do not display end splash screen if quiet=1
+ *
+ * Revision 1.28 2004/06/05 06:41:39 reinelt
+ *
+ * chancged splash screen again
+ *
+ * Revision 1.27 2004/06/05 06:13:11 reinelt
+ *
+ * splash screen for all text-based display drivers
+ *
+ * Revision 1.26 2004/06/02 10:09:22 reinelt
+ *
+ * splash screen for HD44780
+ *
+ * Revision 1.25 2004/06/02 09:41:19 reinelt
+ *
+ * prepared support for startup splash screen
+ *
+ * Revision 1.24 2004/06/01 06:45:29 reinelt
+ *
+ * some Fixme's processed
+ * documented some code
+ *
+ * Revision 1.23 2004/05/31 05:38:02 reinelt
+ *
+ * fixed possible bugs with user-defined chars (clear high bits)
+ * thanks to Andy Baxter for debugging the MilfordInstruments driver!
+ *
+ * Revision 1.22 2004/05/27 03:39:47 reinelt
+ *
+ * changed function naming scheme to plugin::function
+ *
+ * Revision 1.21 2004/05/26 11:37:36 reinelt
+ *
+ * Curses driver ported.
+ *
+ * Revision 1.20 2004/05/22 04:23:49 reinelt
+ *
+ * removed 16*x fix again (next time think before commit :-)
+ *
+ * Revision 1.19 2004/05/22 04:21:02 reinelt
+ *
+ * fix for display RAM layout on 16x4 displays (thanks to toxicated101)
+ *
+ * Revision 1.18 2004/03/20 07:31:32 reinelt
+ * support for HD66712 (which has a different RAM layout)
+ * further threading development
+ *
+ * Revision 1.17 2004/03/19 09:17:46 reinelt
+ *
+ * removed the extra 'goto' function, row and col are additional parameters
+ * of the write() function now.
+ *
+ * Revision 1.16 2004/03/11 06:39:58 reinelt
+ * big patch from Martin:
+ * - reuse filehandles
+ * - memory leaks fixed
+ * - earlier busy-flag checking with HD44780
+ * - reuse memory for strings in RESULT and hash
+ * - netdev_fast to wavid time-consuming regex
+ *
+ * Revision 1.15 2004/03/03 03:47:04 reinelt
+ * big patch from Martin Hejl:
+ * - use qprintf() where appropriate
+ * - save CPU cycles on gettimeofday()
+ * - add quit() functions to free allocated memory
+ * - fixed lots of memory leaks
+ *
+ * Revision 1.14 2004/03/01 04:29:51 reinelt
+ * cfg_number() returns -1 on error, 0 if value not found (but default val used),
+ * and 1 if value was used from the configuration.
+ * HD44780 driver adopted to new cfg_number()
+ * Crystalfontz 631 driver nearly finished
+ *
+ * Revision 1.13 2004/02/15 21:43:43 reinelt
+ * T6963 driver nearly finished
+ * framework for graphic displays done
+ * i2c_sensors patch from Xavier
+ * some more old generation files removed
+ *
+ * Revision 1.12 2004/02/14 11:56:17 reinelt
+ * M50530 driver ported
+ * changed lots of 'char' to 'unsigned char'
+ *
+ * Revision 1.11 2004/02/04 19:10:51 reinelt
+ * Crystalfontz driver nearly finished
+ *
+ * Revision 1.10 2004/02/02 05:22:16 reinelt
+ * Brightness fpr Noritake Displays avaliable as a plugin
+ *
+ * Revision 1.9 2004/02/01 11:51:22 hejl
+ * Fixes for busy flag
+ *
+ * Revision 1.8 2004/02/01 08:05:12 reinelt
+ * Crystalfontz 633 extensions (CRC checking and stuff)
+ * Models table for HD44780
+ * Noritake VFD BVrightness patch from Bill Paxton
+ *
+ * Revision 1.7 2004/01/30 07:12:35 reinelt
+ * HD44780 busy-flag support from Martin Hejl
+ * loadavg() uClibc replacement from Martin Heyl
+ * round() uClibc replacement from Martin Hejl
+ * warning in i2c_sensors fixed
+ * [
+ *
+ * Revision 1.6 2004/01/29 04:40:02 reinelt
+ * every .c file includes "config.h" now
+ *
+ * Revision 1.5 2004/01/23 07:04:17 reinelt
+ * icons finished!
+ *
+ * Revision 1.4 2004/01/23 04:53:48 reinelt
+ * icon widget added (not finished yet!)
+ *
+ * Revision 1.3 2004/01/22 07:57:45 reinelt
+ * several bugs fixed where segfaulting on layout>display
+ * Crystalfontz driver optimized, 632 display already works
+ *
+ * Revision 1.2 2004/01/21 06:39:27 reinelt
+ * HD44780 missed the "clear display' sequence
+ * asc255bug handling added
+ * HD44780 tested, works here!
+ *
+ * Revision 1.1 2004/01/20 15:32:49 reinelt
+ * first version of Next Generation HD44780 (untested! but it compiles...)
+ * some cleanup in the other drivers
+ *
+ */
+
+/*
+ *
+ * exported fuctions:
+ *
+ * struct DRIVER drv_HD44780
+ *
+ */
+
+#include "config.h"
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <errno.h>
+#include <unistd.h>
+#include <termios.h>
+#include <fcntl.h>
+#include <sys/time.h>
+#include <sys/ioctl.h>
+
+#include "debug.h"
+#include "cfg.h"
+#include "udelay.h"
+#include "qprintf.h"
+#include "timer.h"
+#include "plugin.h"
+#include "widget.h"
+#include "widget_text.h"
+#include "widget_icon.h"
+#include "widget_bar.h"
+#include "drv.h"
+#include "drv_generic_text.h"
+#include "drv_generic_parport.h"
+
+#ifdef WITH_I2C
+#include "drv_generic_i2c.h"
+#endif
+
+static char Name[] = "HD44780";
+
+static int Bus;
+static int Model;
+static int Capabilities;
+
+
+/* low level communication timings [nanoseconds]
+ * as these values differ from spec to spec,
+ * we use the worst-case values.
+ */
+
+#define T_CYCLE 1000 /* Enable cycle time */
+#define T_PW 450 /* Enable pulse width */
+#define T_AS 60 /* Address setup time */
+#define T_H 40 /* Data hold time */
+#define T_AH 20 /* Address hold time */
+
+
+/* HD44780 execution timings [microseconds]
+ * as these values differ from spec to spec,
+ * we use the worst-case values.
+ */
+
+#define T_INIT1 4100 /* first init sequence: 4.1 msec */
+#define T_INIT2 100 /* second init sequence: 100 usec */
+#define T_EXEC 80 /* normal execution time */
+#define T_WRCG 120 /* CG RAM Write */
+#define T_CLEAR 2250 /* Clear Display */
+
+
+static int Bits = 0;
+static int numControllers = 0;
+static int allControllers = 0;
+static int currController = 0;
+
+/* size of every single controller */
+static int CROWS[4];
+static int CCOLS[4];
+
+static unsigned char SIGNAL_RW;
+static unsigned char SIGNAL_RS;
+static unsigned char SIGNAL_ENABLE;
+static unsigned char SIGNAL_ENABLE2;
+static unsigned char SIGNAL_ENABLE3;
+static unsigned char SIGNAL_ENABLE4;
+static unsigned char SIGNAL_BACKLIGHT;
+static unsigned char SIGNAL_GPO;
+
+/* maximum time to wait for the busy-flag (in usec) */
+#define MAX_BUSYFLAG_WAIT 10000
+
+/* maximum busy flag errors before falling back to busy-waiting */
+#define MAX_BUSYFLAG_ERRORS 20
+
+/* flag for busy-waiting vs. busy flag checking */
+static int UseBusy = 0;
+
+
+/* Fixme: GPO's not yet implemented */
+static int GPOS;
+/* static int GPO=0; */
+
+
+typedef struct {
+ int type;
+ char *name;
+ int capabilities;
+} MODEL;
+
+#define CAP_PARPORT (1<<0)
+#define CAP_I2C (1<<1)
+#define CAP_GPO (1<<2)
+#define CAP_BACKLIGHT (1<<3)
+#define CAP_BRIGHTNESS (1<<4)
+#define CAP_BUSY4BIT (1<<5)
+#define CAP_HD66712 (1<<6)
+#define CAP_LCM162 (1<<7)
+
+#define BUS_PP CAP_PARPORT
+#define BUS_I2C CAP_I2C
+
+
+static MODEL Models[] = {
+ {0x01, "generic", CAP_PARPORT | CAP_I2C | CAP_GPO | CAP_BACKLIGHT},
+ {0x02, "Noritake", CAP_PARPORT | CAP_I2C | CAP_GPO | CAP_BRIGHTNESS},
+ {0x03, "Soekris", CAP_PARPORT | CAP_BUSY4BIT},
+ {0x04, "HD66712", CAP_PARPORT | CAP_I2C | CAP_GPO | CAP_BACKLIGHT | CAP_HD66712},
+ {0x05, "LCM-162", CAP_PARPORT | CAP_LCM162},
+ {0xff, "Unknown", 0}
+};
+
+
+/****************************************/
+/*** generic functions ***/
+/****************************************/
+
+static int (*drv_HD_load) (const char *section);
+static void (*drv_HD_command) (const unsigned char controller, const unsigned char cmd, const int delay);
+static void (*drv_HD_data) (const unsigned char controller, const char *string, const int len, const int delay);
+static void (*drv_HD_stop) (void);
+
+
+
+/****************************************/
+/*** parport dependant functions ***/
+/****************************************/
+
+static void drv_HD_PP_busy(const int controller)
+{
+ static unsigned int errors = 0;
+
+ unsigned char enable;
+ unsigned char data = 0xFF;
+ unsigned char busymask;
+ unsigned char ctrlmask;
+ unsigned int counter;
+
+ if (Bits == 8) {
+ busymask = 0x80;
+ } else {
+ /* Since in 4-Bit mode DB0 on the parport is mapped to DB4 on the LCD
+ * (and consequently, DB3 on the partport is mapped to DB7 on the LCD)
+ * we need to listen for DB3 on the parport to go low
+ */
+ busymask = 0x08;
+ }
+
+ ctrlmask = 0x08;
+ while (ctrlmask > 0) {
+
+ if (controller & ctrlmask) {
+
+ enable = 0;
+ if (ctrlmask & 0x01)
+ enable = SIGNAL_ENABLE;
+ else if (ctrlmask & 0x02)
+ enable = SIGNAL_ENABLE2;
+ else if (ctrlmask & 0x04)
+ enable = SIGNAL_ENABLE3;
+ else if (ctrlmask & 0x08)
+ enable = SIGNAL_ENABLE4;
+
+ /* set data-lines to input */
+ drv_generic_parport_direction(1);
+
+ if (Bits == 8) {
+ /* Set RW, clear RS */
+ drv_generic_parport_control(SIGNAL_RW | SIGNAL_RS, SIGNAL_RW);
+ } else {
+ drv_generic_parport_data(SIGNAL_RW);
+ }
+
+ /* Address set-up time */
+ ndelay(T_AS);
+
+ /* rise ENABLE */
+ if (Bits == 8) {
+ drv_generic_parport_control(enable, enable);
+ } else {
+ drv_generic_parport_data(SIGNAL_RW | enable);
+ }
+
+ counter = 0;
+ while (1) {
+ /* read the busy flag */
+ data = drv_generic_parport_read();
+ if ((data & busymask) == 0) {
+ errors = 0;
+ break;
+ }
+
+ /* make sure we don't wait forever
+ * - but only check after 5 iterations
+ * that way, we won't slow down normal mode
+ * (where we don't need the timeout anyway)
+ */
+ counter++;
+
+ if (counter >= 5) {
+ struct timeval now, end;
+
+ if (counter == 5) {
+ /* determine the time when the timeout has expired */
+ gettimeofday(&end, NULL);
+ end.tv_usec += MAX_BUSYFLAG_WAIT;
+ while (end.tv_usec > 1000000) {
+ end.tv_usec -= 1000000;
+ end.tv_sec++;
+ }
+ }
+
+ /* get the current time */
+ gettimeofday(&now, NULL);
+ if (now.tv_sec == end.tv_sec ? now.tv_usec >= end.tv_usec : now.tv_sec >= end.tv_sec) {
+ error("%s: timeout waiting for busy flag on controller %x (%x)", Name, ctrlmask, data);
+ if (++errors >= MAX_BUSYFLAG_ERRORS) {
+ error("%s: too many busy flag failures, turning off busy flag checking.", Name);
+ UseBusy = 0;
+ }
+ break;
+ }
+ }
+ }
+
+ /* RS=low, RW=low, EN=low */
+ if (Bits == 8) {
+ /* Lower EN */
+ drv_generic_parport_control(enable, 0);
+
+ /* Address hold time */
+ ndelay(T_AH);
+
+ drv_generic_parport_control(SIGNAL_RW | SIGNAL_RS, 0);
+ } else {
+ /* Lower EN */
+ drv_generic_parport_data(SIGNAL_RW);
+ ndelay(T_AH);
+ drv_generic_parport_data(0);
+ }
+
+ /* set data-lines to output */
+ drv_generic_parport_direction(0);
+ }
+ ctrlmask >>= 1;
+ }
+}
+
+
+static void drv_HD_PP_nibble(const unsigned char controller, const unsigned char nibble)
+{
+ unsigned char enable;
+
+ /* enable signal: 'controller' is a bitmask */
+ /* bit n .. send to controller #n */
+ /* so we can send a byte to more controllers at the same time! */
+ enable = 0;
+ if (controller & 0x01)
+ enable |= SIGNAL_ENABLE;
+ if (controller & 0x02)
+ enable |= SIGNAL_ENABLE2;
+ if (controller & 0x04)
+ enable |= SIGNAL_ENABLE3;
+ if (controller & 0x08)
+ enable |= SIGNAL_ENABLE4;
+
+ /* clear ENABLE */
+ /* put data on DB1..DB4 */
+ /* nibble already contains RS bit! */
+ drv_generic_parport_data(nibble);
+
+ /* Address set-up time */
+ ndelay(T_AS);
+
+ /* rise ENABLE */
+ drv_generic_parport_data(nibble | enable);
+
+ /* Enable pulse width */
+ ndelay(T_PW);
+
+ /* lower ENABLE */
+ drv_generic_parport_data(nibble);
+}
+
+
+static void drv_HD_PP_byte(const unsigned char controller, const unsigned char data, const unsigned char RS)
+{
+ /* send high nibble of the data */
+ drv_HD_PP_nibble(controller, ((data >> 4) & 0x0f) | RS);
+
+ /* Make sure we honour T_CYCLE */
+ ndelay(T_CYCLE - T_AS - T_PW);
+
+ /* send low nibble of the data */
+ drv_HD_PP_nibble(controller, (data & 0x0f) | RS);
+}
+
+
+static void drv_HD_PP_command(const unsigned char controller, const unsigned char cmd, const int delay)
+{
+ unsigned char enable;
+
+ if (UseBusy)
+ drv_HD_PP_busy(controller);
+
+ if (Bits == 8) {
+
+ /* enable signal: 'controller' is a bitmask */
+ /* bit n .. send to controller #n */
+ /* so we can send a byte to more controllers at the same time! */
+ enable = 0;
+ if (controller & 0x01)
+ enable |= SIGNAL_ENABLE;
+ if (controller & 0x02)
+ enable |= SIGNAL_ENABLE2;
+ if (controller & 0x04)
+ enable |= SIGNAL_ENABLE3;
+ if (controller & 0x08)
+ enable |= SIGNAL_ENABLE4;
+
+ /* put data on DB1..DB8 */
+ drv_generic_parport_data(cmd);
+
+ /* clear RW and RS */
+ drv_generic_parport_control(SIGNAL_RW | SIGNAL_RS, 0);
+
+ /* Address set-up time */
+ ndelay(T_AS);
+
+ /* send command */
+ drv_generic_parport_toggle(enable, 1, T_PW);
+
+ } else {
+
+ drv_HD_PP_byte(controller, cmd, 0);
+
+ }
+
+ /* wait for command completion */
+ if (!UseBusy)
+ udelay(delay);
+
+}
+
+
+static void drv_HD_PP_data(const unsigned char controller, const char *string, const int len, const int delay)
+{
+ int l = len;
+ unsigned char enable;
+
+ /* sanity check */
+ if (len <= 0)
+ return;
+
+ if (Bits == 8) {
+
+ /* enable signal: 'controller' is a bitmask */
+ /* bit n .. send to controller #n */
+ /* so we can send a byte to more controllers at the same time! */
+ enable = 0;
+ if (controller & 0x01)
+ enable |= SIGNAL_ENABLE;
+ if (controller & 0x02)
+ enable |= SIGNAL_ENABLE2;
+ if (controller & 0x04)
+ enable |= SIGNAL_ENABLE3;
+ if (controller & 0x08)
+ enable |= SIGNAL_ENABLE4;
+
+ if (!UseBusy) {
+ /* clear RW, set RS */
+ drv_generic_parport_control(SIGNAL_RW | SIGNAL_RS, SIGNAL_RS);
+ /* Address set-up time */
+ ndelay(T_AS);
+ }
+
+ while (l--) {
+
+ if (UseBusy) {
+ drv_HD_PP_busy(controller);
+ /* clear RW, set RS */
+ drv_generic_parport_control(SIGNAL_RW | SIGNAL_RS, SIGNAL_RS);
+ /* Address set-up time */
+ ndelay(T_AS);
+ }
+
+ /* put data on DB1..DB8 */
+ drv_generic_parport_data(*(string++));
+
+ /* send command */
+ drv_generic_parport_toggle(enable, 1, T_PW);
+
+ /* wait for command completion */
+ if (!UseBusy)
+ udelay(delay);
+ }
+
+ } else { /* 4 bit mode */
+
+ while (l--) {
+ if (UseBusy)
+ drv_HD_PP_busy(controller);
+
+ /* send data with RS enabled */
+ drv_HD_PP_byte(controller, *(string++), SIGNAL_RS);
+
+ /* wait for command completion */
+ if (!UseBusy)
+ udelay(delay);
+ }
+ }
+}
+
+
+static int drv_HD_PP_load(const char *section)
+{
+ if (cfg_number(section, "Bits", 8, 4, 8, &Bits) < 0)
+ return -1;
+
+ if (Bits != 4 && Bits != 8) {
+ error("%s: bad %s.Bits '%d' from %s, should be '4' or '8'", Name, section, Bits, cfg_source());
+ return -1;
+ }
+
+ /* LCM-162 only supports 8-bit-mode */
+ if (Capabilities & CAP_LCM162 && Bits != 8) {
+ error("%s: Model '%s' does not support %d bit mode!", Name, Models[Model].name, Bits);
+ Bits = 8;
+ }
+ info("%s: using %d bit mode", Name, Bits);
+
+ if (drv_generic_parport_open(section, Name) != 0) {
+ error("%s: could not initialize parallel port!", Name);
+ return -1;
+ }
+
+ /* Soft-Wiring */
+ if (Capabilities & CAP_LCM162) {
+ /* the LCM-162 is hardwired */
+ if ((SIGNAL_RS = drv_generic_parport_hardwire_ctrl("RS", "SLCTIN")) == 0xff)
+ return -1;
+ if ((SIGNAL_RW = drv_generic_parport_hardwire_ctrl("RW", "INIT")) == 0xff)
+ return -1;
+ if ((SIGNAL_ENABLE = drv_generic_parport_hardwire_ctrl("ENABLE", "AUTOFD")) == 0xff)
+ return -1;
+ if ((SIGNAL_ENABLE2 = drv_generic_parport_hardwire_ctrl("ENABLE2", "GND")) == 0xff)
+ return -1;
+ if ((SIGNAL_ENABLE3 = drv_generic_parport_hardwire_ctrl("ENABLE3", "GND")) == 0xff)
+ return -1;
+ if ((SIGNAL_ENABLE4 = drv_generic_parport_hardwire_ctrl("ENABLE4", "GND")) == 0xff)
+ return -1;
+ if ((SIGNAL_BACKLIGHT = drv_generic_parport_hardwire_ctrl("BACKLIGHT", "GND")) == 0xff)
+ return -1;
+ if ((SIGNAL_GPO = drv_generic_parport_hardwire_ctrl("GPO", "GND")) == 0xff)
+ return -1;
+ } else {
+ if (Bits == 8) {
+ if ((SIGNAL_RS = drv_generic_parport_wire_ctrl("RS", "AUTOFD")) == 0xff)
+ return -1;
+ if ((SIGNAL_RW = drv_generic_parport_wire_ctrl("RW", "GND")) == 0xff)
+ return -1;
+ if ((SIGNAL_ENABLE = drv_generic_parport_wire_ctrl("ENABLE", "STROBE")) == 0xff)
+ return -1;
+ if ((SIGNAL_ENABLE2 = drv_generic_parport_wire_ctrl("ENABLE2", "GND")) == 0xff)
+ return -1;
+ if ((SIGNAL_ENABLE3 = drv_generic_parport_wire_ctrl("ENABLE3", "GND")) == 0xff)
+ return -1;
+ if ((SIGNAL_ENABLE4 = drv_generic_parport_wire_ctrl("ENABLE4", "GND")) == 0xff)
+ return -1;
+ } else {
+ if ((SIGNAL_RS = drv_generic_parport_wire_data("RS", "DB4")) == 0xff)
+ return -1;
+ if ((SIGNAL_RW = drv_generic_parport_wire_data("RW", "DB5")) == 0xff)
+ return -1;
+ if ((SIGNAL_ENABLE = drv_generic_parport_wire_data("ENABLE", "DB6")) == 0xff)
+ return -1;
+ if ((SIGNAL_ENABLE2 = drv_generic_parport_wire_data("ENABLE2", "GND")) == 0xff)
+ return -1;
+ if ((SIGNAL_ENABLE3 = drv_generic_parport_wire_data("ENABLE3", "GND")) == 0xff)
+ return -1;
+ if ((SIGNAL_ENABLE4 = drv_generic_parport_wire_data("ENABLE4", "GND")) == 0xff)
+ return -1;
+ }
+ /* backlight and GPO are always control signals */
+ if ((SIGNAL_BACKLIGHT = drv_generic_parport_wire_ctrl("BACKLIGHT", "GND")) == 0xff)
+ return -1;
+ if ((SIGNAL_GPO = drv_generic_parport_wire_ctrl("GPO", "GND")) == 0xff)
+ return -1;
+ }
+
+ /* clear capabilities if corresponding signal is GND */
+ if (SIGNAL_BACKLIGHT == 0) {
+ Capabilities &= ~CAP_BACKLIGHT;
+ }
+ if (SIGNAL_GPO == 0) {
+ Capabilities &= ~CAP_GPO;
+ }
+
+
+ /* clear all signals */
+ if (Bits == 8) {
+ drv_generic_parport_control(SIGNAL_RS |
+ SIGNAL_RW | SIGNAL_ENABLE | SIGNAL_ENABLE2 | SIGNAL_ENABLE3 | SIGNAL_ENABLE4 | SIGNAL_BACKLIGHT | SIGNAL_GPO, 0);
+ } else {
+ drv_generic_parport_data(0);
+ }
+
+ /* set direction: write */
+ drv_generic_parport_direction(0);
+
+ /* initialize *all* controllers */
+ if (Bits == 8) {
+ drv_HD_PP_command(allControllers, 0x30, T_INIT1); /* 8 Bit mode, wait 4.1 ms */
+ drv_HD_PP_command(allControllers, 0x30, T_INIT2); /* 8 Bit mode, wait 100 us */
+ drv_HD_PP_command(allControllers, 0x38, T_EXEC); /* 8 Bit mode, 1/16 duty cycle, 5x8 font */
+ } else {
+ drv_HD_PP_nibble(allControllers, 0x03);
+ udelay(T_INIT1); /* 4 Bit mode, wait 4.1 ms */
+ drv_HD_PP_nibble(allControllers, 0x03);
+ udelay(T_INIT2); /* 4 Bit mode, wait 100 us */
+ drv_HD_PP_nibble(allControllers, 0x03);
+ udelay(T_INIT1); /* 4 Bit mode, wait 4.1 ms */
+ drv_HD_PP_nibble(allControllers, 0x02);
+ udelay(T_INIT2); /* 4 Bit mode, wait 100 us */
+ drv_HD_PP_command(allControllers, 0x28, T_EXEC); /* 4 Bit mode, 1/16 duty cycle, 5x8 font */
+ }
+
+ /* maybe use busy-flag from now on */
+ /* (we can't use the busy flag during the init sequence) */
+ cfg_number(section, "UseBusy", 0, 0, 1, &UseBusy);
+
+ /* make sure we don't use the busy flag with RW wired to GND */
+ if (UseBusy && !SIGNAL_RW) {
+ error("%s: busy-flag checking is impossible with RW wired to GND!", Name);
+ UseBusy = 0;
+ }
+
+ /* make sure the display supports busy-flag checking in 4-Bit-Mode */
+ /* at the moment this is inly possible with Martin Hejl's gpio driver, */
+ /* which allows to use 4 bits as input and 4 bits as output */
+ if (UseBusy && Bits == 4 && !(Capabilities & CAP_BUSY4BIT)) {
+ error("%s: Model '%s' does not support busy-flag checking in 4 bit mode", Name, Models[Model].name);
+ UseBusy = 0;
+ }
+
+ info("%s: %susing busy-flag checking", Name, UseBusy ? "" : "not ");
+
+ /* The LCM-162 should really use BusyFlag checking */
+ if (!UseBusy && (Capabilities & CAP_LCM162)) {
+ error("%s: Model '%s' should definitely use busy-flag checking!", Name, Models[Model].name);
+ }
+
+ return 0;
+}
+
+
+static void drv_HD_PP_stop(void)
+{
+ /* clear all signals */
+ if (Bits == 8) {
+ drv_generic_parport_control(SIGNAL_RS |
+ SIGNAL_RW | SIGNAL_ENABLE | SIGNAL_ENABLE2 | SIGNAL_ENABLE3 | SIGNAL_ENABLE4 | SIGNAL_BACKLIGHT | SIGNAL_GPO, 0);
+ } else {
+ drv_generic_parport_data(0);
+ }
+
+ drv_generic_parport_close();
+
+}
+
+
+#ifdef WITH_I2C
+
+/****************************************/
+/*** i2c dependant functions ***/
+/****************************************/
+
+ /*
+ DISCLAIMER!!!!
+
+ The following code is WORK IN PROGRESS, since it basicly 'works for us...'
+
+ (C) 2005 Paul Kamphuis & Luis Correia
+
+ We have removed all of the delays from this code, as the I2C bus is slow enough...
+ (maximum possible speed is 100KHz only)
+
+ */
+
+static void drv_HD_I2C_nibble(unsigned char controller, unsigned char nibble)
+{
+ unsigned char enable;
+ unsigned char command; /* this is actually the first data byte on the PCF8574 */
+ unsigned char data_block[2];
+ /* enable signal: 'controller' is a bitmask */
+ /* bit n .. send to controller #n */
+ /* so we can send a byte to more controllers at the same time! */
+ enable = 0;
+ if (controller & 0x01)
+ enable |= SIGNAL_ENABLE;
+ if (controller & 0x02)
+ enable |= SIGNAL_ENABLE2;
+ if (controller & 0x04)
+ enable |= SIGNAL_ENABLE3;
+ if (controller & 0x08)
+ enable |= SIGNAL_ENABLE4;
+
+ /*
+ The new method Paul Kamphuis has concocted places the 3 needed writes to the I2C device
+ as a single operation, using the 'i2c_smbus_write_block_data' function.
+ These actual writes are performed by putting the nibble along with the 'EN' signal.
+
+ command = first byte to be written, which contains the nibble (DB0..DB3)
+ data [0] = second byte to be written, which contains the nibble plus the EN signal
+ data [1] = third byte to be written, which contains the nibble (DB0..DB3)
+
+ Then we write the block as a whole.
+
+ The main advantage we see is that we do 2 less IOCTL's from our driver.
+ */
+
+ command = nibble;
+ data_block[0] = nibble | enable;
+ data_block[1] = nibble;
+
+ drv_generic_i2c_command(command,data_block,2);
+}
+
+
+static void drv_HD_I2C_byte(const unsigned char controller, const unsigned char data)
+{
+ /* send data with RS enabled */
+ drv_HD_I2C_nibble(controller, ((data >> 4) & 0x0f) | SIGNAL_RS);
+ drv_HD_I2C_nibble(controller, (data & 0x0f) | SIGNAL_RS);
+}
+
+
+static void drv_HD_I2C_command(const unsigned char controller, const unsigned char cmd, const int delay)
+{
+ /* send data with RS disabled */
+ drv_HD_I2C_nibble(controller, ((cmd >> 4) & 0x0f));
+ drv_HD_I2C_nibble(controller, ((cmd) & 0x0f));
+}
+
+static void drv_HD_I2C_data(const unsigned char controller, const char *string, const int len, const int delay)
+{
+ int l = len;
+
+ /* sanity check */
+ if (len <= 0)
+ return;
+
+ while (l--) {
+ drv_HD_I2C_byte(controller, *(string++));
+ }
+}
+
+
+static int drv_HD_I2C_load(const char *section)
+{
+ if (cfg_number(section, "Bits", 8, 4, 8, &Bits) < 0)
+ return -1;
+ if (Bits != 4) {
+ error("%s: bad %s.Bits '%d' from %s, should be '4'", Name, section, Bits, cfg_source());
+ return -1;
+ }
+
+ info("%s: using %d bit mode", Name, Bits);
+
+ if (drv_generic_i2c_open(section, Name) != 0) {
+ error("%s: could not initialize i2c attached device!", Name);
+ return -1;
+ }
+
+ if ((SIGNAL_RS = drv_generic_i2c_wire("RS", "DB4")) == 0xff)
+ return -1;
+ if ((SIGNAL_RW = drv_generic_i2c_wire("RW", "DB5")) == 0xff)
+ return -1;
+ if ((SIGNAL_ENABLE = drv_generic_i2c_wire("ENABLE", "DB6")) == 0xff)
+ return -1;
+ if ((SIGNAL_ENABLE2 = drv_generic_i2c_wire("ENABLE2", "GND")) == 0xff)
+ return -1;
+ if ((SIGNAL_GPO = drv_generic_i2c_wire("GPO", "GND")) == 0xff)
+ return -1;
+
+ /* initialize display */
+ drv_HD_I2C_nibble(allControllers, 0x03);
+ udelay(T_INIT1); /* 4 Bit mode, wait 4.1 ms */
+ drv_HD_I2C_nibble(allControllers, 0x03);
+ udelay(T_INIT2); /* 4 Bit mode, wait 100 us */
+ drv_HD_I2C_nibble(allControllers, 0x03);
+ udelay(T_INIT2); /* 4 Bit mode, wait 4.1 ms */
+ drv_HD_I2C_nibble(allControllers, 0x02);
+ udelay(T_INIT2); /* 4 Bit mode, wait 100 us */
+ drv_HD_I2C_command(allControllers, 0x28, T_EXEC); /* 4 Bit mode, 1/16 duty cycle, 5x8 font */
+
+ info("%s: I2C initialization done", Name);
+
+ return 0;
+}
+
+
+static void drv_HD_I2C_stop(void)
+{
+ /* clear all signals */
+ drv_generic_i2c_data(0);
+
+ /* close port */
+ drv_generic_i2c_close();
+}
+
+/* END OF DISCLAIMER */
+
+#endif /* WITH_I2C */
+
+
+/****************************************/
+/*** display dependant functions ***/
+/****************************************/
+
+static void drv_HD_clear(void)
+{
+ drv_HD_command(allControllers, 0x01, T_CLEAR); /* clear *all* displays */
+}
+
+
+static int drv_HD_goto(int row, int col)
+{
+ int pos, controller;
+
+ /* handle multiple controllers */
+ for (pos = 0, controller = 0; controller < numControllers; controller++) {
+ pos += CROWS[controller];
+ if (row < pos) {
+ currController = (1 << controller);
+ break;
+ }
+ row -= CROWS[controller];
+ }
+
+ /* column outside of current display's width */
+ if (col >= CCOLS[controller])
+ return -1;
+
+ if (0) {
+ debug("goto: [%d,%d] mask=%d, controller=%d, size:%dx%d", row, col, currController, controller, CROWS[controller], CCOLS[controller]);
+ }
+
+ /* 16x1 Displays are organized as 8x2 :-( */
+ if (CCOLS[controller] == 16 && CROWS[controller] == 1 && col > 7) {
+ row++;
+ col -= 8;
+ }
+
+ if (Capabilities & CAP_HD66712) {
+ /* the HD66712 doesn't have a braindamadged RAM layout */
+ pos = row * 32 + col;
+ } else {
+ /* 16x4 Controllers use a slightly different layout */
+ if (CCOLS[controller] == 16 && CROWS[controller] == 4) {
+ pos = (row % 2) * 64 + (row / 2) * 16 + col;
+ } else {
+ pos = (row % 2) * 64 + (row / 2) * 20 + col;
+ }
+ }
+ drv_HD_command(currController, (0x80 | pos), T_EXEC);
+
+ /* return columns left on current display */
+ return CCOLS[controller] - col;
+
+}
+
+
+static void drv_HD_write(const int row, const int col, const char *data, const int len)
+{
+ int space = drv_HD_goto(row, col);
+ if (space > 0) {
+ drv_HD_data(currController, data, len > space ? space : len, T_EXEC);
+ }
+}
+
+
+static void drv_HD_defchar(const int ascii, const unsigned char *matrix)
+{
+ int i;
+ char buffer[8];
+
+ for (i = 0; i < 8; i++) {
+ buffer[i] = matrix[i] & 0x1f;
+ }
+
+ /* define chars on *all* controllers! */
+ drv_HD_command(allControllers, 0x40 | 8 * ascii, T_EXEC);
+ drv_HD_data(allControllers, buffer, 8, T_WRCG);
+}
+
+
+static int drv_HD_backlight(int backlight)
+{
+ if (!(Capabilities & CAP_BACKLIGHT))
+ return -1;
+
+ if (backlight < 0)
+ backlight = 0;
+ if (backlight > 1)
+ backlight = 1;
+
+ drv_generic_parport_control(SIGNAL_BACKLIGHT, backlight ? SIGNAL_BACKLIGHT : 0);
+
+ return backlight;
+}
+
+
+static int drv_HD_brightness(int brightness)
+{
+ char cmd;
+
+ if (!(Capabilities & CAP_BRIGHTNESS))
+ return -1;
+
+ if (brightness < 0)
+ brightness = 0;
+ if (brightness > 3)
+ brightness = 3;
+
+ cmd = '0' + brightness;
+
+ drv_HD_command(allControllers, 0x38, T_EXEC); /* enable function */
+ drv_HD_data(allControllers, &cmd, 1, T_WRCG); /* set brightness */
+
+ return brightness;
+}
+
+
+/* Fixme: GPO's */
+#if 0
+static void drv_HD_setGPO(const int bits)
+{
+ if (Lcd.gpos > 0) {
+
+ /* put data on DB1..DB8 */
+ drv_generic_parport_data(bits);
+
+ /* 74HCT573 set-up time */
+ ndelay(20);
+
+ /* send data */
+ /* 74HCT573 enable pulse width = 24ns */
+ drv_generic_parport_toggle(SIGNAL_GPO, 1, 230);
+ }
+}
+#endif
+
+
+static void drv_HD_LCM162_timer(void __attribute__ ((unused)) * notused)
+{
+ static unsigned char data = 0x00;
+
+ /* Bit 3+5 : key number */
+ /* Bit 6 : key press/release */
+ unsigned char mask3 = 1 << 3;
+ unsigned char mask5 = 1 << 5;
+ unsigned char mask6 = 1 << 6;
+ unsigned char mask = mask3 | mask5 | mask6;
+
+ int keynum;
+ int updown;
+
+ unsigned char temp;
+
+ temp = drv_generic_parport_status() & mask;
+
+ if (data != temp) {
+ data = temp;
+
+ keynum = (data & mask3 ? 1 : 0) + (data & mask5 ? 2 : 0);
+ updown = (data & mask6 ? 1 : 0);
+
+ debug("key %d press %d", keynum, updown);
+ }
+}
+
+
+static int drv_HD_start(const char *section, const int quiet)
+{
+ char *model, *size, *bus;
+ int rows = -1, cols = -1, gpos = -1, i;
+ int size_defined = 0;
+ int size_missing = 0;
+
+ model = cfg_get(section, "Model", "generic");
+ if (model != NULL && *model != '\0') {
+ int i;
+ for (i = 0; Models[i].type != 0xff; i++) {
+ if (strcasecmp(Models[i].name, model) == 0)
+ break;
+ }
+ if (Models[i].type == 0xff) {
+ error("%s: %s.Model '%s' is unknown from %s", Name, section, model, cfg_source());
+ return -1;
+ }
+ Model = i;
+ Capabilities = Models[Model].capabilities;
+ info("%s: using model '%s'", Name, Models[Model].name);
+ } else {
+ error("%s: empty '%s.Model' entry from %s", Name, section, cfg_source());
+ if (model)
+ free(model);
+ return -1;
+ }
+ free(model);
+
+ bus = cfg_get(section, "Bus", "parport");
+ if (bus == NULL && *bus == '\0') {
+ error("%s: empty '%s.Bus' entry from %s", Name, section, cfg_source());
+ if (bus)
+ free(bus);
+ return -1;
+ }
+
+ if (strcasecmp(bus, "parport") == 0) {
+ info("%s: using parallel port", Name);
+ Bus = BUS_PP;
+ drv_HD_load = drv_HD_PP_load;
+ drv_HD_command = drv_HD_PP_command;
+ drv_HD_data = drv_HD_PP_data;
+ drv_HD_stop = drv_HD_PP_stop;
+
+ } else if (strcasecmp(bus, "i2c") == 0) {
+#ifdef WITH_I2C
+ info("%s: using I2C bus", Name);
+ Bus = BUS_I2C;
+ drv_HD_load = drv_HD_I2C_load;
+ drv_HD_command = drv_HD_I2C_command;
+ drv_HD_data = drv_HD_I2C_data;
+ drv_HD_stop = drv_HD_I2C_stop;
+#else
+ error("%s: %s.Bus '%s' from %s not available:", Name, section, bus, cfg_source());
+ error("%s: lcd4linux was compiled without i2c support!", Name);
+ free(bus);
+ return -1;
+#endif
+
+ } else {
+ error("%s: bad %s.Bus '%s' from %s, should be 'parport' or 'i2c'", Name, section, bus, cfg_source());
+ free(bus);
+ return -1;
+ }
+
+ /* sanity check: Model can use bus */
+ if (!(Capabilities & Bus)) {
+ error("%s: Model '%s' cannot be used on the %s bus!", Name, Models[Model].name, bus);
+ free(bus);
+ return -1;
+ }
+ free(bus);
+
+ if (cfg_number(section, "Controllers", 1, 1, 4, (int *) &numControllers) < 0)
+ return -1;
+ info("%s: using %d Controller(s)", Name, numControllers);
+
+ /* current Controller */
+ currController = 1;
+
+ /* Bitmask for *all* Controllers */
+ allControllers = (1 << numControllers) - 1;
+
+
+ DCOLS = 0;
+ DROWS = 0;
+
+ for (i = 0; i < numControllers; i++) {
+ char key[6];
+ qprintf(key, sizeof(key), "Size%d", i + 1);
+ size = cfg_get(section, key, NULL);
+ if (size == NULL || *size == '\0') {
+ size_missing++;
+ free(size);
+ continue;
+ }
+ if (sscanf(size, "%dx%d", &cols, &rows) != 2 || rows < 1 || cols < 1) {
+ error("%s: bad %s.%s '%s' from %s", Name, section, key, size, cfg_source());
+ free(size);
+ return -1;
+ }
+ free(size);
+ CCOLS[i] = cols;
+ CROWS[i] = rows;
+ size_defined++;
+ info("%s: Controller %d: %dx%d", Name, i + 1, cols, rows);
+ /* grow the size */
+ if (cols > DCOLS)
+ DCOLS = cols;
+ DROWS += rows;
+ }
+ if (size_defined && size_missing) {
+ error("%s: bad %s.Size* definition in %s:", Name, section, cfg_source());
+ error("%s: either you specify the size for *all* controllers or for none.", Name);
+ return -1;
+ }
+
+ size = cfg_get(section, "Size", NULL);
+ if (size != NULL && *size != '\0') {
+ if (sscanf(size, "%dx%d", &cols, &rows) != 2 || rows < 1 || cols < 1) {
+ error("%s: bad %s.Size '%s' from %s", Name, section, size, cfg_source());
+ free(size);
+ return -1;
+ }
+ if (DCOLS == 0 && DROWS == 0) {
+ for (i = 0; i < numControllers; i++) {
+ CCOLS[i] = cols;
+ CROWS[i] = rows / numControllers;
+ DCOLS = CCOLS[i];
+ DROWS += CROWS[i];
+ }
+ }
+ if (rows != DROWS || cols != DCOLS) {
+ error("%s: bad %s.Size definition in %s:", Name, section, cfg_source());
+ error("%s: Size %dx%d should be %dx%d", Name, cols, rows, DCOLS, DROWS);
+ return -1;
+ }
+ }
+ free(size);
+
+
+ if (cfg_number(section, "GPOs", 0, 0, 8, &gpos) < 0)
+ return -1;
+ if (gpos > 0 && !(Capabilities & CAP_GPO)) {
+ error("%s: Model '%s' does not support GPO's!", Name, Models[Model].name);
+ gpos = 0;
+ }
+ GPOS = gpos;
+ if (gpos > 0) {
+ info("%s: using %d GPO's", Name, GPOS);
+ }
+
+ if (drv_HD_load(section) < 0) {
+ error("%s: start display failed!", Name);
+ return -1;
+ }
+
+ drv_HD_command(allControllers, 0x08, T_EXEC); /* Controller off, cursor off, blink off */
+ drv_HD_command(allControllers, 0x0c, T_CLEAR); /* Display on, cursor off, blink off, wait 1.64 ms */
+ drv_HD_command(allControllers, 0x06, T_EXEC); /* curser moves to right, no shift */
+
+ if ((Capabilities & CAP_HD66712) && DROWS > 2) {
+ drv_HD_command(allControllers, Bits == 8 ? 0x3c : 0x2c, T_EXEC); /* set extended register enable bit */
+ drv_HD_command(allControllers, 0x09, T_EXEC); /* set 4-line mode */
+ drv_HD_command(allControllers, Bits == 8 ? 0x38 : 0x28, T_EXEC); /* clear extended register enable bit */
+ }
+
+ drv_HD_clear(); /* clear *all* displays */
+ drv_HD_command(allControllers, 0x03, T_CLEAR); /* return home */
+
+ /* maybe set backlight */
+ if (Capabilities & CAP_BACKLIGHT) {
+ int backlight;
+ if (cfg_number(section, "Backlight", 0, 0, 1, &backlight) > 0) {
+ info("%s: backlight %s", Name, backlight ? "enabled" : "disabled");
+ drv_HD_backlight(backlight);
+ }
+ }
+
+ /* maybe set brightness */
+ if (Capabilities & CAP_BRIGHTNESS) {
+ int brightness;
+ if (cfg_number(section, "Brightness", 0, 0, 3, &brightness) > 0) {
+ info("%s: brightness level %d", Name, brightness);
+ drv_HD_brightness(brightness);
+ }
+ }
+
+ /* install keypad polling timer for LCM-162 */
+ if (Capabilities & CAP_LCM162) {
+ timer_add(drv_HD_LCM162_timer, NULL, 10, 0);
+ }
+
+ if (!quiet) {
+ char buffer[40];
+ qprintf(buffer, sizeof(buffer), "%s %dx%d", Name, DCOLS, DROWS);
+ if (drv_generic_text_greet(buffer, NULL)) {
+ sleep(3);
+ drv_HD_clear();
+ }
+ }
+
+ return 0;
+}
+
+
+/****************************************/
+/*** plugins ***/
+/****************************************/
+
+
+static void plugin_backlight(RESULT * result, RESULT * arg1)
+{
+ double backlight;
+
+ backlight = drv_HD_backlight(R2N(arg1));
+ SetResult(&result, R_NUMBER, &backlight);
+}
+
+
+static void plugin_brightness(RESULT * result, RESULT * arg1)
+{
+ double brightness;
+
+ brightness = drv_HD_brightness(R2N(arg1));
+ SetResult(&result, R_NUMBER, &brightness);
+}
+
+
+/****************************************/
+/*** widget callbacks ***/
+/****************************************/
+
+
+/* using drv_generic_text_draw(W) */
+/* using drv_generic_text_icon_draw(W) */
+/* using drv_generic_text_bar_draw(W) */
+
+
+/****************************************/
+/*** exported functions ***/
+/****************************************/
+
+
+/* list models */
+int drv_HD_list(void)
+{
+ int i;
+
+ for (i = 0; Models[i].type != 0xff; i++) {
+ printf("%s ", Models[i].name);
+ }
+ return 0;
+}
+
+
+/* initialize driver & display */
+int drv_HD_init(const char *section, const int quiet)
+{
+ WIDGET_CLASS wc;
+ int asc255bug;
+ int ret;
+
+ /* display preferences */
+ XRES = 5; /* pixel width of one char */
+ YRES = 8; /* pixel height of one char */
+ CHARS = 8; /* number of user-defineable characters */
+ CHAR0 = 0; /* ASCII of first user-defineable char */
+ GOTO_COST = 1; /* number of bytes a goto command requires */
+
+ /* real worker functions */
+ drv_generic_text_real_write = drv_HD_write;
+ drv_generic_text_real_defchar = drv_HD_defchar;
+
+
+ /* start display */
+ if ((ret = drv_HD_start(section, quiet)) != 0)
+ return ret;
+
+ /* initialize generic text driver */
+ if ((ret = drv_generic_text_init(section, Name)) != 0)
+ return ret;
+
+ /* initialize generic icon driver */
+ if ((ret = drv_generic_text_icon_init()) != 0)
+ return ret;
+
+ /* initialize generic bar driver */
+ if ((ret = drv_generic_text_bar_init(0)) != 0)
+ return ret;
+
+ /* add fixed chars to the bar driver */
+ /* most displays have a full block on ascii 255, but some have kind of */
+ /* an 'inverted P'. If you specify 'asc255bug 1 in the config, this */
+ /* char will not be used, but rendered by the bar driver */
+ cfg_number(section, "asc255bug", 0, 0, 1, &asc255bug);
+ drv_generic_text_bar_add_segment(0, 0, 255, 32); /* ASCII 32 = blank */
+ if (!asc255bug)
+ drv_generic_text_bar_add_segment(255, 255, 255, 255); /* ASCII 255 = block */
+
+ /* register text widget */
+ wc = Widget_Text;
+ wc.draw = drv_generic_text_draw;
+ widget_register(&wc);
+
+ /* register icon widget */
+ wc = Widget_Icon;
+ wc.draw = drv_generic_text_icon_draw;
+ widget_register(&wc);
+
+ /* register bar widget */
+ wc = Widget_Bar;
+ wc.draw = drv_generic_text_bar_draw;
+ widget_register(&wc);
+
+ /* register plugins */
+ if (Capabilities & CAP_BACKLIGHT) {
+ AddFunction("LCD::backlight", 1, plugin_backlight);
+ }
+ if (Capabilities & CAP_BRIGHTNESS) {
+ AddFunction("LCD::brightness", 1, plugin_brightness);
+ }
+
+ return 0;
+}
+
+
+/* close driver & display */
+int drv_HD_quit(const int quiet)
+{
+
+ info("%s: shutting down.", Name);
+
+ drv_generic_text_quit();
+
+ /* clear display */
+ drv_HD_clear();
+
+ /* say goodbye... */
+ if (!quiet) {
+ drv_generic_text_greet("goodbye!", NULL);
+ }
+
+ drv_HD_stop();
+
+ return (0);
+}
+
+
+DRIVER drv_HD44780 = {
+ name:Name,
+ list:drv_HD_list,
+ init:drv_HD_init,
+ quit:drv_HD_quit,
+};
diff --git a/drv_generic_i2c.c b/drv_generic_i2c.c index 538b19a..22b4c72 100644 --- a/drv_generic_i2c.c +++ b/drv_generic_i2c.c @@ -1,164 +1,192 @@ -/* $Id: drv_generic_i2c.c,v 1.3 2005/05/08 04:32:44 reinelt Exp $ - * - * generic driver helper for i2c displays - * - * Copyright (C) 2005 Luis F. Correia <luis.f.correia@seg-social.pt> - * Copyright (C) 2005 The LCD4Linux Team <lcd4linux-devel@users.sourceforge.net> - * - * This file is part of LCD4Linux. - * - * LCD4Linux 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, or (at your option) - * any later version. - * - * LCD4Linux 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. - * - * +/* $Id: drv_generic_i2c.c,v 1.4 2005/05/31 20:42:55 lfcorreia Exp $
+ *
+ * generic driver helper for i2c displays
+ *
+ * Copyright (C) 2005 Luis Correia <lfcorreia@users.sf.net>
+ * Copyright (C) 2005 The LCD4Linux Team <lcd4linux-devel@users.sourceforge.net>
+ *
+ * This file is part of LCD4Linux.
+ *
+ * LCD4Linux 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, or (at your option)
+ * any later version.
+ *
+ * LCD4Linux 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.
+ *
+ *
* $Log: drv_generic_i2c.c,v $ - * Revision 1.3 2005/05/08 04:32:44 reinelt - * CodingStyle added and applied - * - * Revision 1.2 2005/04/05 05:12:57 reinelt - * i2c patch from Paul (still does not work here :-( - * - * Revision 1.1 2005/03/28 19:39:23 reinelt - * HD44780/I2C patch from Luis merged (still does not work for me) + * Revision 1.4 2005/05/31 20:42:55 lfcorreia + * new file: lcd4linux_i2c.h + * avoid the problems detecting the proper I2C kernel include files * + * rearrange all the other autoconf stuff to remove I2C detection * - */ - -#include "config.h" - -#include <stdlib.h> -#include <stdio.h> -#include <string.h> -#include <errno.h> -#include <unistd.h> -#include <termios.h> -#include <fcntl.h> -#include <time.h> -#include <signal.h> -#include <sys/types.h> -#include <sys/stat.h> -#include <sys/ioctl.h> - -#include <linux/compiler.h> -#include <linux/i2c.h> -#include <linux/i2c-dev.h> - -#include "debug.h" -#include "qprintf.h" -#include "cfg.h" -#include "udelay.h" -#include "drv_generic_i2c.h" - -static char *Driver = ""; -static char *Section = ""; -static int i2c_device; - -static void my_i2c_smbus_write_byte_data(const int device, const unsigned char data) -{ - struct i2c_smbus_ioctl_data args; - args.read_write = I2C_SMBUS_WRITE; - args.command = data; - args.size = I2C_SMBUS_BYTE; - args.data = 0; - ioctl(device, I2C_SMBUS, &args); -} - -static void my_i2c_smbus_read_byte_data(const int device, const unsigned char data) -{ - struct i2c_smbus_ioctl_data args; - args.read_write = I2C_SMBUS_READ; - args.command = data; - args.size = I2C_SMBUS_BYTE; - args.data = 0; - ioctl(device, I2C_SMBUS, &args); -} - -int drv_generic_i2c_open(const char *section, const char *driver) -{ - int dev; - char *bus, *device; - - //SIGNAL_ENABLE = 0x40; - //SIGNAL_RW = 0x10; - //SIGNAL_RS = 0x20; - - udelay_init(); - - Section = (char *) section; - Driver = (char *) driver; - - bus = cfg_get(Section, "Port", NULL); - device = cfg_get(Section, "Device", NULL); - dev = atoi(device); - info("%s: initializing I2C bus %s", Driver, bus); - info("device %d", dev); - if ((i2c_device = open(bus, O_WRONLY)) < 0) { - error("%s: I2C bus %s open failed !\n", Driver, bus); - return -1; - } - - info("%s: initializing I2C slave device 0x%x", Driver, dev); - if (ioctl(i2c_device, I2C_SLAVE, dev) < 0) { - error("%s: error initializing device 0x%x\n", Driver, dev); - close(i2c_device); - return -1; - } - - return 0; -} - - -int drv_generic_i2c_close(void) -{ - - close(i2c_device); - - return 0; -} - -unsigned char drv_generic_i2c_wire(const char *name, const char *deflt) -{ - unsigned char w; - char wire[256]; - char *s; - - qprintf(wire, sizeof(wire), "Wire.%s", name); - s = cfg_get(Section, wire, deflt); - if (strlen(s) == 3 && strncasecmp(s, "DB", 2) == 0 && s[2] >= '0' && s[2] <= '7') { - w = s[2] - '0'; - } else if (strcasecmp(s, "GND") == 0) { - w = 0; - } else { - error("%s: unknown signal <%s> for wire <%s>", Driver, s, name); - error("%s: should be DB0..7 or GND", Driver); - return 0xff; - } - free(s); - if (w == 0) { - info("%s: wiring: [DISPLAY:%s]<==>[i2c:GND]", Driver, name); - } else { - info("%s: wiring: [DISPLAY:%s]<==>[i2c:DB%d]", Driver, name, w); - } - - w = 1 << w; - - return w; -} - -void drv_generic_i2c_data(const unsigned char data) -{ - - my_i2c_smbus_write_byte_data(i2c_device, data); - -} + * new method by Paul Kamphuis to write to the I2C device + *
+ * Revision 1.3 2005/05/08 04:32:44 reinelt
+ * CodingStyle added and applied
+ *
+ * Revision 1.2 2005/04/05 05:12:57 reinelt
+ * i2c patch from Paul (still does not work here :-(
+ *
+ * Revision 1.1 2005/03/28 19:39:23 reinelt
+ * HD44780/I2C patch from Luis merged (still does not work for me)
+ *
+ *
+ */
+
+
+ /*
+ DISCLAIMER!!!!
+
+ The following code is WORK IN PROGRESS, since it basicly 'works for us...'
+
+ (C) 2005 Paul Kamphuis & Luis Correia
+
+ We have removed all of the delays from this code, as the I2C bus is slow enough...
+ (maximum possible speed is 100KHz only)
+
+ */
+
+
+#include "config.h"
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <errno.h>
+#include <unistd.h>
+#include <termios.h>
+#include <fcntl.h>
+#include <time.h>
+#include <signal.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <sys/ioctl.h>
+
+#include "lcd4linux_i2c.h"
+#include "debug.h"
+#include "qprintf.h"
+#include "cfg.h"
+#include "udelay.h"
+#include "drv_generic_i2c.h"
+
+static char *Driver = "";
+static char *Section = "";
+static int i2c_device;
+
+static void my_i2c_smbus_write_byte_data(const int device, const unsigned char val)
+{
+ struct i2c_smbus_ioctl_data args;
+ union i2c_smbus_data data;
+ args.read_write = I2C_SMBUS_WRITE;
+ args.command = val;
+ args.size = I2C_SMBUS_BYTE_DATA;
+ data.byte = val;
+ args.data = &data;
+
+ if (ioctl(device, I2C_SMBUS, &args) < 0) {
+ info("I2C: device %s IOCTL failed !\n", device);
+ }
+
+}
+
+static void my_i2c_smbus_read_byte_data(const int device, const unsigned char data)
+{
+ struct i2c_smbus_ioctl_data args;
+ args.read_write = I2C_SMBUS_READ;
+ args.command = data;
+ args.size = I2C_SMBUS_BYTE;
+ args.data = 0;
+ ioctl(device, I2C_SMBUS, &args);
+}
+
+int drv_generic_i2c_open(const char *section, const char *driver)
+{
+ int dev;
+ char *bus, *device;
+
+ udelay_init();
+
+ Section = (char *) section;
+ Driver = (char *) driver;
+
+ bus = cfg_get(Section, "Port", NULL);
+ device = cfg_get(Section, "Device", NULL);
+ dev = atoi(device);
+ info("%s: initializing I2C bus %s", Driver, bus);
+ info("device %d", dev);
+ if ((i2c_device = open(bus, O_WRONLY)) < 0) {
+ error("%s: I2C bus %s open failed !\n", Driver, bus);
+ return -1;
+ }
+
+ info("%s: initializing I2C slave device 0x%x", Driver, dev);
+ if (ioctl(i2c_device, I2C_SLAVE, dev) < 0) {
+ error("%s: error initializing device 0x%x\n", Driver, dev);
+ close(i2c_device);
+ return -1;
+ }
+
+ return 0;
+}
+
+
+int drv_generic_i2c_close(void)
+{
+
+ close(i2c_device);
+
+ return 0;
+}
+
+unsigned char drv_generic_i2c_wire(const char *name, const char *deflt)
+{
+ unsigned char w;
+ char wire[256];
+ char *s;
+
+ qprintf(wire, sizeof(wire), "Wire.%s", name);
+ s = cfg_get(Section, wire, deflt);
+ if (strlen(s) == 3 && strncasecmp(s, "DB", 2) == 0 && s[2] >= '0' && s[2] <= '7') {
+ w = s[2] - '0';
+ } else if (strcasecmp(s, "GND") == 0) {
+ w = 0;
+ } else {
+ error("%s: unknown signal <%s> for wire <%s>", Driver, s, name);
+ error("%s: should be DB0..7 or GND", Driver);
+ return 0xff;
+ }
+ free(s);
+ if (w == 0) {
+ info("%s: wiring: [DISPLAY:%s]<==>[i2c:GND]", Driver, name);
+ } else {
+ info("%s: wiring: [DISPLAY:%s]<==>[i2c:DB%d]", Driver, name, w);
+ }
+
+ w = 1 << w;
+
+ return w;
+}
+
+void drv_generic_i2c_data(const unsigned char data)
+{
+
+ my_i2c_smbus_write_byte_data(i2c_device, data);
+
+}
+
+void drv_generic_i2c_command(const unsigned char command, const unsigned char *data, const unsigned char length)
+{
+
+ i2c_smbus_write_block_data(i2c_device,command,length,(unsigned char *)data);
+
+}
diff --git a/drv_generic_i2c.h b/drv_generic_i2c.h index 64f4ed0..dd885be 100644 --- a/drv_generic_i2c.h +++ b/drv_generic_i2c.h @@ -1,64 +1,77 @@ -/* $Id: drv_generic_i2c.h,v 1.2 2005/05/08 04:32:44 reinelt Exp $ - * - * generic driver helper for i2c displays - * - * Copyright (C) 2005 Luis F. Correia <luis.f.correia@seg-social.pt> - * Copyright (C) 2005 The LCD4Linux Team <lcd4linux-devel@users.sourceforge.net> - * - * This file is part of LCD4Linux. - * - * LCD4Linux 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, or (at your option) - * any later version. - * - * LCD4Linux 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. - * - * +/* $Id: drv_generic_i2c.h,v 1.3 2005/05/31 20:42:55 lfcorreia Exp $
+ *
+ * generic driver helper for i2c displays
+ *
+ * Copyright (C) 2005 Luis F. Correia <luis.f.correia@seg-social.pt>
+ * Copyright (C) 2005 The LCD4Linux Team <lcd4linux-devel@users.sourceforge.net>
+ *
+ * This file is part of LCD4Linux.
+ *
+ * LCD4Linux 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, or (at your option)
+ * any later version.
+ *
+ * LCD4Linux 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.
+ *
+ *
* $Log: drv_generic_i2c.h,v $ - * Revision 1.2 2005/05/08 04:32:44 reinelt - * CodingStyle added and applied - * - * Revision 1.1 2005/03/28 19:39:23 reinelt - * HD44780/I2C patch from Luis merged (still does not work for me) - * - * - */ - -/* - * - * exported fuctions: - * - * int drv_generic_i2c_open (void) - * reads 'Port' entry from config and opens - * the i2c port - * returns 0 if ok, -1 on failure - * - * int drv_generic_i2c_close (void) - * closes i2c port - * returns 0 if ok, -1 on failure - * - * unsigned char drv_generic_i2c_wire (char *name, char *deflt) - * reads wiring for one data signal from config - * returns 1<<bitpos or 255 on error - * - * void drv_generic_i2c_data (unsigned char value) - * put data bits on DB1..DB8 - */ - -#ifndef _DRV_GENERIC_I2C_H_ -#define _DRV_GENERIC_I2C_H_ - -int drv_generic_i2c_open(const char *section, const char *driver); -int drv_generic_i2c_close(void); -unsigned char drv_generic_i2c_wire(const char *name, const char *deflt); -void drv_generic_i2c_data(const unsigned char data); - -#endif + * Revision 1.3 2005/05/31 20:42:55 lfcorreia + * new file: lcd4linux_i2c.h + * avoid the problems detecting the proper I2C kernel include files + * + * rearrange all the other autoconf stuff to remove I2C detection + * + * new method by Paul Kamphuis to write to the I2C device + *
+ * Revision 1.2 2005/05/08 04:32:44 reinelt
+ * CodingStyle added and applied
+ *
+ * Revision 1.1 2005/03/28 19:39:23 reinelt
+ * HD44780/I2C patch from Luis merged (still does not work for me)
+ *
+ *
+ */
+
+/*
+ *
+ * exported fuctions:
+ *
+ * int drv_generic_i2c_open (void)
+ * reads 'Port' entry from config and opens
+ * the i2c port
+ * returns 0 if ok, -1 on failure
+ *
+ * int drv_generic_i2c_close (void)
+ * closes i2c port
+ * returns 0 if ok, -1 on failure
+ *
+ * unsigned char drv_generic_i2c_wire (char *name, char *deflt)
+ * reads wiring for one data signal from config
+ * returns 1<<bitpos or 255 on error
+ *
+ * void drv_generic_i2c_data (unsigned char value)
+ * put data bits on DB1..DB8
+ *
+ * void drv_generic_i2c_command(unsigned char command, unsigned char *data,unsigned char length)
+ * send command and the data to the i2c device
+ *
+ */
+
+#ifndef _DRV_GENERIC_I2C_H_
+#define _DRV_GENERIC_I2C_H_
+
+int drv_generic_i2c_open(const char *section, const char *driver);
+int drv_generic_i2c_close(void);
+unsigned char drv_generic_i2c_wire(const char *name, const char *deflt);
+void drv_generic_i2c_data(const unsigned char data);
+void drv_generic_i2c_command(const unsigned char command, const unsigned char *data, const unsigned char length);
+
+#endif
diff --git a/lcd4linux_i2c.h b/lcd4linux_i2c.h new file mode 100644 index 0000000..6980419 --- /dev/null +++ b/lcd4linux_i2c.h @@ -0,0 +1,643 @@ +/* $Id: lcd4linux_i2c.h,v 1.1 2005/05/31 20:42:55 lfcorreia Exp $
+ *
+ * user space i2c sturctures and defines, taken from the official kernel i2c
+ * includes to solve the problem when compiling user space application
+ * (lcd4linux) with kernel space includes.
+ * Should be removed when the kernel team decides on how to solve this
+ * user space/kernel space compilation problem in kernel 2.8 or so.
+ *
+ * Copyright (C) 2005 Paul Kamphuis <pk_richman@users.sourceforge.net>
+ * Copyright (C) 2005 The LCD4Linux Team <lcd4linux-devel@users.sourceforge.net>
+ *
+ * taken from kernel includes i2c.h and i2c-dev.h to prevent using kernel includes
+ * Copyright (C) 1995-2000 Simon G. Vogl
+ * With some changes from Kyösti Mälkki <kmalkki@cc.hut.fi> and
+ * Frodo Looijaard <frodol@dds.nl>
+ *
+ * This file is part of LCD4Linux.
+ *
+ * LCD4Linux 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, or (at your option)
+ * any later version.
+ *
+ * LCD4Linux 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.
+ *
+ *
+ * $Log: lcd4linux_i2c.h,v $ + * Revision 1.1 2005/05/31 20:42:55 lfcorreia + * new file: lcd4linux_i2c.h + * avoid the problems detecting the proper I2C kernel include files + * + * rearrange all the other autoconf stuff to remove I2C detection + * + * new method by Paul Kamphuis to write to the I2C device + *
+ */
+
+#ifndef _LCD4LINUX_I2C_H
+#define _LCD4LINUX_I2C_H
+
+typedef signed int s32;
+typedef signed int __s32;
+typedef unsigned char u8;
+typedef unsigned short u16;
+typedef unsigned char __u8;
+typedef unsigned short __u16;
+typedef unsigned int u32;
+typedef unsigned int __u32;
+
+/* --- General options ------------------------------------------------ */
+
+struct i2c_msg;
+struct i2c_algorithm;
+struct i2c_adapter;
+struct i2c_client;
+struct i2c_driver;
+struct i2c_client_address_data;
+union i2c_smbus_data;
+
+/*
+ * The master routines are the ones normally used to transmit data to devices
+ * on a bus (or read from them). Apart from two basic transfer functions to
+ * transmit one message at a time, a more complex version can be used to
+ * transmit an arbitrary number of messages without interruption.
+ */
+extern int i2c_master_send(struct i2c_client *,const char* ,int);
+extern int i2c_master_recv(struct i2c_client *,char* ,int);
+
+/* Transfer num messages.
+ */
+extern int i2c_transfer(struct i2c_adapter *adap, struct i2c_msg msg[],int num);
+
+/*
+ * Some adapter types (i.e. PCF 8584 based ones) may support slave behaviuor.
+ * This is not tested/implemented yet and will change in the future.
+ */
+extern int i2c_slave_send(struct i2c_client *,char*,int);
+extern int i2c_slave_recv(struct i2c_client *,char*,int);
+
+
+
+/* This is the very generalized SMBus access routine. You probably do not
+ want to use this, though; one of the functions below may be much easier,
+ and probably just as fast.
+ Note that we use i2c_adapter here, because you do not need a specific
+ smbus adapter to call this function. */
+extern s32 i2c_smbus_xfer (struct i2c_adapter * adapter, u16 addr,
+ unsigned short flags,
+ char read_write, u8 command, int size,
+ union i2c_smbus_data * data);
+
+/* Now follow the 'nice' access routines. These also document the calling
+ conventions of smbus_access. */
+/*
+extern s32 i2c_smbus_write_quick(struct i2c_client * client, u8 value);
+extern s32 i2c_smbus_read_byte(struct i2c_client * client);
+extern s32 i2c_smbus_write_byte(struct i2c_client * client, u8 value);
+extern s32 i2c_smbus_read_byte_data(struct i2c_client * client, u8 command);
+extern s32 i2c_smbus_write_byte_data(struct i2c_client * client,
+ u8 command, u8 value);
+extern s32 i2c_smbus_read_word_data(struct i2c_client * client, u8 command);
+extern s32 i2c_smbus_write_word_data(struct i2c_client * client,
+ u8 command, u16 value);
+*/
+/* Returns the number of bytes transferred */
+/*
+extern s32 i2c_smbus_write_block_data(struct i2c_client * client,
+ u8 command, u8 length,
+ u8 *values);
+extern s32 i2c_smbus_read_i2c_block_data(struct i2c_client * client,
+ u8 command, u8 *values);
+*/
+
+/*
+ * A driver is capable of handling one or more physical devices present on
+ * I2C adapters. This information is used to inform the driver of adapter
+ * events.
+ */
+
+/*flags for the driver struct: */
+#define I2C_DF_NOTIFY 0x01 /* notify on bus (de/a)ttaches */
+
+/*flags for the client struct: */
+#define I2C_CLIENT_ALLOW_USE 0x01 /* Client allows access */
+#define I2C_CLIENT_ALLOW_MULTIPLE_USE 0x02 /* Allow multiple access-locks */
+ /* on an i2c_client */
+#define I2C_CLIENT_PEC 0x04 /* Use Packet Error Checking */
+#define I2C_CLIENT_TEN 0x10 /* we have a ten bit chip address */
+ /* Must equal I2C_M_TEN below */
+
+/* i2c adapter classes (bitmask) */
+#define I2C_CLASS_HWMON (1<<0) /* lm_sensors, ... */
+#define I2C_CLASS_TV_ANALOG (1<<1) /* bttv + friends */
+#define I2C_CLASS_TV_DIGITAL (1<<2) /* dvb cards */
+#define I2C_CLASS_DDC (1<<3) /* i2c-matroxfb ? */
+#define I2C_CLASS_CAM_ANALOG (1<<4) /* camera with analog CCD */
+#define I2C_CLASS_CAM_DIGITAL (1<<5) /* most webcams */
+#define I2C_CLASS_SOUND (1<<6) /* sound devices */
+#define I2C_CLASS_ALL (UINT_MAX) /* all of the above */
+
+/* i2c_client_address_data is the struct for holding default client
+ * addresses for a driver and for the parameters supplied on the
+ * command line
+ */
+struct i2c_client_address_data {
+ unsigned short *normal_i2c;
+ unsigned short *normal_i2c_range;
+ unsigned short *probe;
+ unsigned short *probe_range;
+ unsigned short *ignore;
+ unsigned short *ignore_range;
+ unsigned short *force;
+};
+
+/* Internal numbers to terminate lists */
+#define I2C_CLIENT_END 0xfffe
+#define I2C_CLIENT_ISA_END 0xfffefffe
+
+/* The numbers to use to set I2C bus address */
+#define ANY_I2C_BUS 0xffff
+#define ANY_I2C_ISA_BUS 9191
+
+/* The length of the option lists */
+#define I2C_CLIENT_MAX_OPTS 48
+
+
+/* ----- functions exported by i2c.o */
+
+/* administration...
+ */
+extern int i2c_add_adapter(struct i2c_adapter *);
+extern int i2c_del_adapter(struct i2c_adapter *);
+
+extern int i2c_add_driver(struct i2c_driver *);
+extern int i2c_del_driver(struct i2c_driver *);
+
+extern int i2c_attach_client(struct i2c_client *);
+extern int i2c_detach_client(struct i2c_client *);
+
+/* New function: This is to get an i2c_client-struct for controlling the
+ client either by using i2c_control-function or having the
+ client-module export functions that can be used with the i2c_client
+ -struct. */
+extern struct i2c_client *i2c_get_client(int driver_id, int adapter_id,
+ struct i2c_client *prev);
+
+/* Should be used with new function
+ extern struct i2c_client *i2c_get_client(int,int,struct i2c_client *);
+ to make sure that client-struct is valid and that it is okay to access
+ the i2c-client.
+ returns -EACCES if client doesn't allow use (default)
+ returns -EBUSY if client doesn't allow multiple use (default) and
+ usage_count >0 */
+extern int i2c_use_client(struct i2c_client *);
+extern int i2c_release_client(struct i2c_client *);
+
+/* call the i2c_client->command() of all attached clients with
+ * the given arguments */
+extern void i2c_clients_command(struct i2c_adapter *adap,
+ unsigned int cmd, void *arg);
+
+/* returns -EBUSY if address has been taken, 0 if not. Note that the only
+ other place at which this is called is within i2c_attach_client; so
+ you can cheat by simply not registering. Not recommended, of course! */
+extern int i2c_check_addr (struct i2c_adapter *adapter, int addr);
+
+/* Detect function. It iterates over all possible addresses itself.
+ * It will only call found_proc if some client is connected at the
+ * specific address (unless a 'force' matched);
+ */
+extern int i2c_probe(struct i2c_adapter *adapter,
+ struct i2c_client_address_data *address_data,
+ int (*found_proc) (struct i2c_adapter *, int, int));
+
+/* An ioctl like call to set div. parameters of the adapter.
+ */
+extern int i2c_control(struct i2c_client *,unsigned int, unsigned long);
+
+/* This call returns a unique low identifier for each registered adapter,
+ * or -1 if the adapter was not registered.
+ */
+extern int i2c_adapter_id(struct i2c_adapter *adap);
+extern struct i2c_adapter* i2c_get_adapter(int id);
+extern void i2c_put_adapter(struct i2c_adapter *adap);
+
+
+/* Return the functionality mask */
+extern u32 i2c_get_functionality (struct i2c_adapter *adap);
+
+/* Return 1 if adapter supports everything we need, 0 if not. */
+extern int i2c_check_functionality (struct i2c_adapter *adap, u32 func);
+
+/*
+ * I2C Message - used for pure i2c transaction, also from /dev interface
+ */
+struct i2c_msg {
+ __u16 addr; /* slave address */
+ __u16 flags;
+#define I2C_M_TEN 0x10 /* we have a ten bit chip address */
+#define I2C_M_RD 0x01
+#define I2C_M_NOSTART 0x4000
+#define I2C_M_REV_DIR_ADDR 0x2000
+#define I2C_M_IGNORE_NAK 0x1000
+#define I2C_M_NO_RD_ACK 0x0800
+ __u16 len; /* msg length */
+ __u8 *buf; /* pointer to msg data */
+};
+
+/* To determine what functionality is present */
+
+#define I2C_FUNC_I2C 0x00000001
+#define I2C_FUNC_10BIT_ADDR 0x00000002
+#define I2C_FUNC_PROTOCOL_MANGLING 0x00000004 /* I2C_M_{REV_DIR_ADDR,NOSTART,..} */
+#define I2C_FUNC_SMBUS_HWPEC_CALC 0x00000008 /* SMBus 2.0 */
+#define I2C_FUNC_SMBUS_READ_WORD_DATA_PEC 0x00000800 /* SMBus 2.0 */
+#define I2C_FUNC_SMBUS_WRITE_WORD_DATA_PEC 0x00001000 /* SMBus 2.0 */
+#define I2C_FUNC_SMBUS_PROC_CALL_PEC 0x00002000 /* SMBus 2.0 */
+#define I2C_FUNC_SMBUS_BLOCK_PROC_CALL_PEC 0x00004000 /* SMBus 2.0 */
+#define I2C_FUNC_SMBUS_BLOCK_PROC_CALL 0x00008000 /* SMBus 2.0 */
+#define I2C_FUNC_SMBUS_QUICK 0x00010000
+#define I2C_FUNC_SMBUS_READ_BYTE 0x00020000
+#define I2C_FUNC_SMBUS_WRITE_BYTE 0x00040000
+#define I2C_FUNC_SMBUS_READ_BYTE_DATA 0x00080000
+#define I2C_FUNC_SMBUS_WRITE_BYTE_DATA 0x00100000
+#define I2C_FUNC_SMBUS_READ_WORD_DATA 0x00200000
+#define I2C_FUNC_SMBUS_WRITE_WORD_DATA 0x00400000
+#define I2C_FUNC_SMBUS_PROC_CALL 0x00800000
+#define I2C_FUNC_SMBUS_READ_BLOCK_DATA 0x01000000
+#define I2C_FUNC_SMBUS_WRITE_BLOCK_DATA 0x02000000
+#define I2C_FUNC_SMBUS_READ_I2C_BLOCK 0x04000000 /* I2C-like block xfer */
+#define I2C_FUNC_SMBUS_WRITE_I2C_BLOCK 0x08000000 /* w/ 1-byte reg. addr. */
+#define I2C_FUNC_SMBUS_READ_I2C_BLOCK_2 0x10000000 /* I2C-like block xfer */
+#define I2C_FUNC_SMBUS_WRITE_I2C_BLOCK_2 0x20000000 /* w/ 2-byte reg. addr. */
+#define I2C_FUNC_SMBUS_READ_BLOCK_DATA_PEC 0x40000000 /* SMBus 2.0 */
+#define I2C_FUNC_SMBUS_WRITE_BLOCK_DATA_PEC 0x80000000 /* SMBus 2.0 */
+
+#define I2C_FUNC_SMBUS_BYTE I2C_FUNC_SMBUS_READ_BYTE | \
+ I2C_FUNC_SMBUS_WRITE_BYTE
+#define I2C_FUNC_SMBUS_BYTE_DATA I2C_FUNC_SMBUS_READ_BYTE_DATA | \
+ I2C_FUNC_SMBUS_WRITE_BYTE_DATA
+#define I2C_FUNC_SMBUS_WORD_DATA I2C_FUNC_SMBUS_READ_WORD_DATA | \
+ I2C_FUNC_SMBUS_WRITE_WORD_DATA
+#define I2C_FUNC_SMBUS_BLOCK_DATA I2C_FUNC_SMBUS_READ_BLOCK_DATA | \
+ I2C_FUNC_SMBUS_WRITE_BLOCK_DATA
+#define I2C_FUNC_SMBUS_I2C_BLOCK I2C_FUNC_SMBUS_READ_I2C_BLOCK | \
+ I2C_FUNC_SMBUS_WRITE_I2C_BLOCK
+#define I2C_FUNC_SMBUS_I2C_BLOCK_2 I2C_FUNC_SMBUS_READ_I2C_BLOCK_2 | \
+ I2C_FUNC_SMBUS_WRITE_I2C_BLOCK_2
+#define I2C_FUNC_SMBUS_BLOCK_DATA_PEC I2C_FUNC_SMBUS_READ_BLOCK_DATA_PEC | \
+ I2C_FUNC_SMBUS_WRITE_BLOCK_DATA_PEC
+#define I2C_FUNC_SMBUS_WORD_DATA_PEC I2C_FUNC_SMBUS_READ_WORD_DATA_PEC | \
+ I2C_FUNC_SMBUS_WRITE_WORD_DATA_PEC
+
+#define I2C_FUNC_SMBUS_READ_BYTE_PEC I2C_FUNC_SMBUS_READ_BYTE_DATA
+#define I2C_FUNC_SMBUS_WRITE_BYTE_PEC I2C_FUNC_SMBUS_WRITE_BYTE_DATA
+#define I2C_FUNC_SMBUS_READ_BYTE_DATA_PEC I2C_FUNC_SMBUS_READ_WORD_DATA
+#define I2C_FUNC_SMBUS_WRITE_BYTE_DATA_PEC I2C_FUNC_SMBUS_WRITE_WORD_DATA
+#define I2C_FUNC_SMBUS_BYTE_PEC I2C_FUNC_SMBUS_BYTE_DATA
+#define I2C_FUNC_SMBUS_BYTE_DATA_PEC I2C_FUNC_SMBUS_WORD_DATA
+
+#define I2C_FUNC_SMBUS_EMUL I2C_FUNC_SMBUS_QUICK | \
+ I2C_FUNC_SMBUS_BYTE | \
+ I2C_FUNC_SMBUS_BYTE_DATA | \
+ I2C_FUNC_SMBUS_WORD_DATA | \
+ I2C_FUNC_SMBUS_PROC_CALL | \
+ I2C_FUNC_SMBUS_WRITE_BLOCK_DATA | \
+ I2C_FUNC_SMBUS_WRITE_BLOCK_DATA_PEC | \
+ I2C_FUNC_SMBUS_I2C_BLOCK
+
+/*
+ * Data for SMBus Messages
+ */
+#define I2C_SMBUS_BLOCK_MAX 32 /* As specified in SMBus standard */
+#define I2C_SMBUS_I2C_BLOCK_MAX 32 /* Not specified but we use same structure */
+union i2c_smbus_data {
+ __u8 byte;
+ __u16 word;
+ __u8 block[I2C_SMBUS_BLOCK_MAX + 3]; /* block[0] is used for length */
+ /* one more for read length in block process call */
+ /* and one more for PEC */
+};
+
+/* smbus_access read or write markers */
+#define I2C_SMBUS_READ 1
+#define I2C_SMBUS_WRITE 0
+
+/* SMBus transaction types (size parameter in the above functions)
+ Note: these no longer correspond to the (arbitrary) PIIX4 internal codes! */
+#define I2C_SMBUS_QUICK 0
+#define I2C_SMBUS_BYTE 1
+#define I2C_SMBUS_BYTE_DATA 2
+#define I2C_SMBUS_WORD_DATA 3
+#define I2C_SMBUS_PROC_CALL 4
+#define I2C_SMBUS_BLOCK_DATA 5
+#define I2C_SMBUS_I2C_BLOCK_DATA 6
+#define I2C_SMBUS_BLOCK_PROC_CALL 7 /* SMBus 2.0 */
+#define I2C_SMBUS_BLOCK_DATA_PEC 8 /* SMBus 2.0 */
+#define I2C_SMBUS_PROC_CALL_PEC 9 /* SMBus 2.0 */
+#define I2C_SMBUS_BLOCK_PROC_CALL_PEC 10 /* SMBus 2.0 */
+#define I2C_SMBUS_WORD_DATA_PEC 11 /* SMBus 2.0 */
+
+
+/* ----- commands for the ioctl like i2c_command call:
+ * note that additional calls are defined in the algorithm and hw
+ * dependent layers - these can be listed here, or see the
+ * corresponding header files.
+ */
+ /* -> bit-adapter specific ioctls */
+#define I2C_RETRIES 0x0701 /* number of times a device address */
+ /* should be polled when not */
+ /* acknowledging */
+#define I2C_TIMEOUT 0x0702 /* set timeout - call with int */
+
+
+/* this is for i2c-dev.c */
+#define I2C_SLAVE 0x0703 /* Change slave address */
+ /* Attn.: Slave address is 7 or 10 bits */
+#define I2C_SLAVE_FORCE 0x0706 /* Change slave address */
+ /* Attn.: Slave address is 7 or 10 bits */
+ /* This changes the address, even if it */
+ /* is already taken! */
+#define I2C_TENBIT 0x0704 /* 0 for 7 bit addrs, != 0 for 10 bit */
+
+#define I2C_FUNCS 0x0705 /* Get the adapter functionality */
+#define I2C_RDWR 0x0707 /* Combined R/W transfer (one stop only)*/
+#define I2C_PEC 0x0708 /* != 0 for SMBus PEC */
+#if 0
+#define I2C_ACK_TEST 0x0710 /* See if a slave is at a specific address */
+#endif
+
+#define I2C_SMBUS 0x0720 /* SMBus-level access */
+
+/* ... algo-bit.c recognizes */
+#define I2C_UDELAY 0x0705 /* set delay in microsecs between each */
+ /* written byte (except address) */
+#define I2C_MDELAY 0x0706 /* millisec delay between written bytes */
+
+/* ----- I2C-DEV: char device interface stuff ------------------------- */
+
+#define I2C_MAJOR 89 /* Device major number */
+
+/* These defines are used for probing i2c client addresses */
+/* Default fill of many variables */
+#define I2C_CLIENT_DEFAULTS {I2C_CLIENT_END, I2C_CLIENT_END, I2C_CLIENT_END, \
+ I2C_CLIENT_END, I2C_CLIENT_END, I2C_CLIENT_END, \
+ I2C_CLIENT_END, I2C_CLIENT_END, I2C_CLIENT_END, \
+ I2C_CLIENT_END, I2C_CLIENT_END, I2C_CLIENT_END, \
+ I2C_CLIENT_END, I2C_CLIENT_END, I2C_CLIENT_END, \
+ I2C_CLIENT_END, I2C_CLIENT_END, I2C_CLIENT_END, \
+ I2C_CLIENT_END, I2C_CLIENT_END, I2C_CLIENT_END, \
+ I2C_CLIENT_END, I2C_CLIENT_END, I2C_CLIENT_END, \
+ I2C_CLIENT_END, I2C_CLIENT_END, I2C_CLIENT_END, \
+ I2C_CLIENT_END, I2C_CLIENT_END, I2C_CLIENT_END, \
+ I2C_CLIENT_END, I2C_CLIENT_END, I2C_CLIENT_END, \
+ I2C_CLIENT_END, I2C_CLIENT_END, I2C_CLIENT_END, \
+ I2C_CLIENT_END, I2C_CLIENT_END, I2C_CLIENT_END, \
+ I2C_CLIENT_END, I2C_CLIENT_END, I2C_CLIENT_END, \
+ I2C_CLIENT_END, I2C_CLIENT_END, I2C_CLIENT_END, \
+ I2C_CLIENT_END, I2C_CLIENT_END, I2C_CLIENT_END}
+
+/* This is ugly. We need to evaluate I2C_CLIENT_MAX_OPTS before it is
+ stringified */
+#define I2C_CLIENT_MODPARM_AUX1(x) "1-" #x "h"
+#define I2C_CLIENT_MODPARM_AUX(x) I2C_CLIENT_MODPARM_AUX1(x)
+#define I2C_CLIENT_MODPARM I2C_CLIENT_MODPARM_AUX(I2C_CLIENT_MAX_OPTS)
+
+/* I2C_CLIENT_MODULE_PARM creates a module parameter, and puts it in the
+ module header */
+
+#define I2C_CLIENT_MODULE_PARM(var,desc) \
+ static unsigned short var[I2C_CLIENT_MAX_OPTS] = I2C_CLIENT_DEFAULTS; \
+ static unsigned int var##_num; \
+ /*MODULE_PARM(var,I2C_CLIENT_MODPARM);*/ \
+ module_param_array(var, short, &var##_num, 0); \
+ MODULE_PARM_DESC(var,desc)
+
+/* This is the one you want to use in your own modules */
+#define I2C_CLIENT_INSMOD \
+ I2C_CLIENT_MODULE_PARM(probe, \
+ "List of adapter,address pairs to scan additionally"); \
+ I2C_CLIENT_MODULE_PARM(probe_range, \
+ "List of adapter,start-addr,end-addr triples to scan " \
+ "additionally"); \
+ I2C_CLIENT_MODULE_PARM(ignore, \
+ "List of adapter,address pairs not to scan"); \
+ I2C_CLIENT_MODULE_PARM(ignore_range, \
+ "List of adapter,start-addr,end-addr triples not to " \
+ "scan"); \
+ I2C_CLIENT_MODULE_PARM(force, \
+ "List of adapter,address pairs to boldly assume " \
+ "to be present"); \
+ static struct i2c_client_address_data addr_data = { \
+ .normal_i2c = normal_i2c, \
+ .normal_i2c_range = normal_i2c_range, \
+ .probe = probe, \
+ .probe_range = probe_range, \
+ .ignore = ignore, \
+ .ignore_range = ignore_range, \
+ .force = force, \
+ }
+
+/* Detect whether we are on the isa bus. If this returns true, all i2c
+ access will fail! */
+#define i2c_is_isa_client(clientptr) \
+ ((clientptr)->adapter->algo->id == I2C_ALGO_ISA)
+#define i2c_is_isa_adapter(adapptr) \
+ ((adapptr)->algo->id == I2C_ALGO_ISA)
+
+
+/* Some IOCTL commands are defined in <linux/i2c.h> */
+/* Note: 10-bit addresses are NOT supported! */
+
+/* This is the structure as used in the I2C_SMBUS ioctl call */
+struct i2c_smbus_ioctl_data {
+ __u8 read_write;
+ __u8 command;
+ __u32 size;
+ union i2c_smbus_data *data;
+};
+
+/* This is the structure as used in the I2C_RDWR ioctl call */
+struct i2c_rdwr_ioctl_data {
+ struct i2c_msg *msgs; /* pointers to i2c_msgs */
+ __u32 nmsgs; /* number of i2c_msgs */
+};
+
+#define I2C_RDRW_IOCTL_MAX_MSGS 42
+
+#include <sys/ioctl.h>
+
+static inline __s32 i2c_smbus_access(int file, char read_write, __u8 command,
+ int size, union i2c_smbus_data *data)
+{
+ struct i2c_smbus_ioctl_data args;
+
+ args.read_write = read_write;
+ args.command = command;
+ args.size = size;
+ args.data = data;
+ return ioctl(file,I2C_SMBUS,&args);
+}
+
+
+static inline __s32 i2c_smbus_write_quick(int file, __u8 value)
+{
+ return i2c_smbus_access(file,value,0,I2C_SMBUS_QUICK,NULL);
+}
+
+static inline __s32 i2c_smbus_read_byte(int file)
+{
+ union i2c_smbus_data data;
+ if (i2c_smbus_access(file,I2C_SMBUS_READ,0,I2C_SMBUS_BYTE,&data))
+ return -1;
+ else
+ return 0x0FF & data.byte;
+}
+
+static inline __s32 i2c_smbus_write_byte(int file, __u8 value)
+{
+ return i2c_smbus_access(file,I2C_SMBUS_WRITE,value,
+ I2C_SMBUS_BYTE,NULL);
+}
+
+static inline __s32 i2c_smbus_read_byte_data(int file, __u8 command)
+{
+ union i2c_smbus_data data;
+ if (i2c_smbus_access(file,I2C_SMBUS_READ,command,
+ I2C_SMBUS_BYTE_DATA,&data))
+ return -1;
+ else
+ return 0x0FF & data.byte;
+}
+
+static inline __s32 i2c_smbus_write_byte_data(int file, __u8 command,
+ __u8 value)
+{
+ union i2c_smbus_data data;
+ data.byte = value;
+ return i2c_smbus_access(file,I2C_SMBUS_WRITE,command,
+ I2C_SMBUS_BYTE_DATA, &data);
+}
+
+static inline __s32 i2c_smbus_read_word_data(int file, __u8 command)
+{
+ union i2c_smbus_data data;
+ if (i2c_smbus_access(file,I2C_SMBUS_READ,command,
+ I2C_SMBUS_WORD_DATA,&data))
+ return -1;
+ else
+ return 0x0FFFF & data.word;
+}
+
+static inline __s32 i2c_smbus_write_word_data(int file, __u8 command,
+ __u16 value)
+{
+ union i2c_smbus_data data;
+ data.word = value;
+ return i2c_smbus_access(file,I2C_SMBUS_WRITE,command,
+ I2C_SMBUS_WORD_DATA, &data);
+}
+
+static inline __s32 i2c_smbus_process_call(int file, __u8 command, __u16 value)
+{
+ union i2c_smbus_data data;
+ data.word = value;
+ if (i2c_smbus_access(file,I2C_SMBUS_WRITE,command,
+ I2C_SMBUS_PROC_CALL,&data))
+ return -1;
+ else
+ return 0x0FFFF & data.word;
+}
+
+
+/* Returns the number of read bytes */
+static inline __s32 i2c_smbus_read_block_data(int file, __u8 command,
+ __u8 *values)
+{
+ union i2c_smbus_data data;
+ int i;
+ if (i2c_smbus_access(file,I2C_SMBUS_READ,command,
+ I2C_SMBUS_BLOCK_DATA,&data))
+ return -1;
+ else {
+ for (i = 1; i <= data.block[0]; i++)
+ values[i-1] = data.block[i];
+ return data.block[0];
+ }
+}
+
+static inline __s32 i2c_smbus_write_block_data(int file, __u8 command,
+ __u8 length, __u8 *values)
+{
+ union i2c_smbus_data data;
+ int i;
+ if (length > 32)
+ length = 32;
+ for (i = 1; i <= length; i++)
+ data.block[i] = values[i-1];
+ data.block[0] = length;
+ return i2c_smbus_access(file,I2C_SMBUS_WRITE,command,
+ I2C_SMBUS_BLOCK_DATA, &data);
+}
+
+/* Returns the number of read bytes */
+static inline __s32 i2c_smbus_read_i2c_block_data(int file, __u8 command,
+ __u8 *values)
+{
+ union i2c_smbus_data data;
+ int i;
+ if (i2c_smbus_access(file,I2C_SMBUS_READ,command,
+ I2C_SMBUS_I2C_BLOCK_DATA,&data))
+ return -1;
+ else {
+ for (i = 1; i <= data.block[0]; i++)
+ values[i-1] = data.block[i];
+ return data.block[0];
+ }
+}
+
+static inline __s32 i2c_smbus_write_i2c_block_data(int file, __u8 command,
+ __u8 length, __u8 *values)
+{
+ union i2c_smbus_data data;
+ int i;
+ if (length > 32)
+ length = 32;
+ for (i = 1; i <= length; i++)
+ data.block[i] = values[i-1];
+ data.block[0] = length;
+ return i2c_smbus_access(file,I2C_SMBUS_WRITE,command,
+ I2C_SMBUS_I2C_BLOCK_DATA, &data);
+}
+
+/* Returns the number of read bytes */
+static inline __s32 i2c_smbus_block_process_call(int file, __u8 command,
+ __u8 length, __u8 *values)
+{
+ union i2c_smbus_data data;
+ int i;
+ if (length > 32)
+ length = 32;
+ for (i = 1; i <= length; i++)
+ data.block[i] = values[i-1];
+ data.block[0] = length;
+ if (i2c_smbus_access(file,I2C_SMBUS_WRITE,command,
+ I2C_SMBUS_BLOCK_PROC_CALL,&data))
+ return -1;
+ else {
+ for (i = 1; i <= data.block[0]; i++)
+ values[i-1] = data.block[i];
+ return data.block[0];
+ }
+}
+
+
+#endif /* _LCD4LINUX_I2C_H */
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