diff options
Diffstat (limited to 'target/linux/ep93xx/patches-2.6.30/002-lcd-linux-hd44780.patch')
| -rw-r--r-- | target/linux/ep93xx/patches-2.6.30/002-lcd-linux-hd44780.patch | 4342 |
1 files changed, 4342 insertions, 0 deletions
diff --git a/target/linux/ep93xx/patches-2.6.30/002-lcd-linux-hd44780.patch b/target/linux/ep93xx/patches-2.6.30/002-lcd-linux-hd44780.patch new file mode 100644 index 0000000000..7480b28117 --- /dev/null +++ b/target/linux/ep93xx/patches-2.6.30/002-lcd-linux-hd44780.patch @@ -0,0 +1,4342 @@ +Index: linux-2.6.30.9/arch/arm/Kconfig +=================================================================== +--- linux-2.6.30.9.orig/arch/arm/Kconfig 2009-10-05 17:38:08.000000000 +0200 ++++ linux-2.6.30.9/arch/arm/Kconfig 2009-11-24 02:01:42.000000000 +0100 +@@ -1407,6 +1407,8 @@ + + source "drivers/accessibility/Kconfig" + ++source "drivers/lcd-linux/Kconfig" ++ + source "drivers/leds/Kconfig" + + source "drivers/rtc/Kconfig" +Index: linux-2.6.30.9/drivers/Makefile +=================================================================== +--- linux-2.6.30.9.orig/drivers/Makefile 2009-10-05 17:38:08.000000000 +0200 ++++ linux-2.6.30.9/drivers/Makefile 2009-11-24 02:01:42.000000000 +0100 +@@ -106,4 +106,5 @@ + obj-$(CONFIG_SSB) += ssb/ + obj-$(CONFIG_VIRTIO) += virtio/ + obj-$(CONFIG_STAGING) += staging/ ++obj-$(CONFIG_LCD_LINUX) += lcd-linux/ + obj-y += platform/ +Index: linux-2.6.30.9/drivers/lcd-linux/Config.in +=================================================================== +--- /dev/null 1970-01-01 00:00:00.000000000 +0000 ++++ linux-2.6.30.9/drivers/lcd-linux/Config.in 2009-11-24 02:01:42.000000000 +0100 +@@ -0,0 +1,8 @@ ++if [ "$CONFIG_EXPERIMENTAL" = "y" ]; then ++ mainmenu_option next_comment ++ comment 'LCD support' ++ ++ tristate 'LCD-Linux layer' CONFIG_LCD_LINUX ++ dep_tristate ' HD44780 controller' CONFIG_LCD_HD44780 $CONFIG_LCD_LINUX ++ endmenu ++fi +Index: linux-2.6.30.9/drivers/lcd-linux/Kconfig +=================================================================== +--- /dev/null 1970-01-01 00:00:00.000000000 +0000 ++++ linux-2.6.30.9/drivers/lcd-linux/Kconfig 2009-11-24 02:01:42.000000000 +0100 +@@ -0,0 +1,33 @@ ++menu "LCD-Linux support" ++ depends on EXPERIMENTAL ++ ++config LCD_LINUX ++ tristate "LCD-Linux layer" ++ default m ++ help ++ LCD-Linux provides an easy way to drive LCD displays under ++ Linux by creating a character which can be read or written. ++ It features complete VT102 emulation and recognizes ++ many escape sequences. If you want to use it you must also ++ choose an appropriate driver, otherwise it will not be ++ very useful. For more information see ++ http://lcd-linux.sourceforge.net/ ++ ++ To compile LCD-Linux as a module, choose M here: ++ the module will be called lcd-linux. ++ ++config LCD_HD44780 ++ tristate "HD44780 controller" ++ depends on LCD_LINUX && MACH_SIM_ONE ++ default m ++ help ++ This is a LCD-Linux driver for LCD displays based on the ++ Hitachi HD44780 (and compatible) controllers connected ++ to the SimOne LCD port. ++ ++ To compile this driver as a module, choose M here: ++ the module will be called hd44780. ++ ++ If unsure, say N. ++ ++endmenu +Index: linux-2.6.30.9/drivers/lcd-linux/Makefile +=================================================================== +--- /dev/null 1970-01-01 00:00:00.000000000 +0000 ++++ linux-2.6.30.9/drivers/lcd-linux/Makefile 2009-11-24 02:01:42.000000000 +0100 +@@ -0,0 +1,8 @@ ++# ++# ++# Standard Makefile to statically compile LCD-Linux into the kernel ++# Linux 2.6 ++ ++obj-$(CONFIG_LCD_LINUX) += lcd-linux.o ++obj-$(CONFIG_LCD_HD44780) += hd44780.o ++ +Index: linux-2.6.30.9/drivers/lcd-linux/cgram/default.h +=================================================================== +--- /dev/null 1970-01-01 00:00:00.000000000 +0000 ++++ linux-2.6.30.9/drivers/lcd-linux/cgram/default.h 2009-11-24 02:01:42.000000000 +0100 +@@ -0,0 +1,37 @@ ++/* default.h ++ * ++ * ++ * ++ * Default user defined characters for lcdmod. ++ * ++ * Copyright (C) by Michael McLellan (mikey@cs.auckland.ac.nz) ++ * ++ * This program is free software; you can redistribute it and/or modify ++ * it under the terms of the GNU General Public License as published by ++ * the Free Software Foundation; either version 2 of the License, or ++ * (at your option) any later version. ++ * ++ * This program is distributed in the hope that it will be useful, ++ * but WITHOUT ANY WARRANTY; without even the implied warranty of ++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the ++ * GNU General Public License for more details. ++ * ++ * You should have received a copy of the GNU General Public License ++ * along with this program; if not, write to the Free Software ++ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA ++ * ++ * ++ */ ++ ++static void init_charmap(void) ++{ ++} ++ ++static unsigned char cg0[] = { 0x1f, 0x1f, 0x11, 0x0f, 0x11, 0x1e, 0x01, 0x1f }; ++static unsigned char cg1[] = { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x1f }; ++static unsigned char cg2[] = { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x1f, 0x1f }; ++static unsigned char cg3[] = { 0x00, 0x00, 0x00, 0x00, 0x00, 0x1f, 0x1f, 0x1f }; ++static unsigned char cg4[] = { 0x00, 0x00, 0x00, 0x00, 0x1f, 0x1f, 0x1f, 0x1f }; ++static unsigned char cg5[] = { 0x00, 0x00, 0x00, 0x1f, 0x1f, 0x1f, 0x1f, 0x1f }; ++static unsigned char cg6[] = { 0x00, 0x00, 0x1f, 0x1f, 0x1f, 0x1f, 0x1f, 0x1f }; ++static unsigned char cg7[] = { 0x00, 0x1f, 0x1f, 0x1f, 0x1f, 0x1f, 0x1f, 0x1f }; +Index: linux-2.6.30.9/drivers/lcd-linux/charmap.h +=================================================================== +--- /dev/null 1970-01-01 00:00:00.000000000 +0000 ++++ linux-2.6.30.9/drivers/lcd-linux/charmap.h 2009-11-24 02:01:42.000000000 +0100 +@@ -0,0 +1,79 @@ ++/* charmap.h ++ * ++ * ++ * ++ * Character mapping for HD44780 devices by Mark Haemmerling <mail@markh.de>. ++ * ++ * Translates ISO 8859-1 to HD44780 charset. ++ * HD44780 charset reference: http://markh.de/hd44780-charset.png ++ * ++ * Initial table taken from lcd.o Linux kernel driver by ++ * Nils Faerber <nilsf@users.sourceforge.net>. Thanks! ++ * ++ * This file is released under the GNU General Public License. Refer to the ++ * COPYING file distributed with this package. ++ * ++ * Following translations are being performed: ++ * - maps umlaut accent characters to the corresponding umlaut characters ++ * - maps other accent characters to the characters without accents ++ * - maps beta (=ringel-S), micro and Yen ++ * ++ * Alternative mappings: ++ * - #112 ("p") -> #240 (large "p"), orig. mapped -> #112 ++ * - #113 ("q") -> #241 (large "q"), orig. mapped -> #113 ++ * ++ * HD44780 misses backslash ++ * ++ */ ++ ++static unsigned char charmap[] = { ++ ++/* 0 - 31 */ ++ 0, 1, 2, 3, 4, 5, 6, 7, ++ 8, 9, 10, 11, 12, 13, 14, 15, ++ 16, 17, 18, 19, 20, 21, 22, 23, ++ 24, 25, 26, 27, 28, 29, 30, 31, ++ ++/* 32 - 63 */ ++ 32, 33, 34, 35, 36, 37, 38, 39, ++ 40, 41, 42, 43, 44, 45, 46, 47, ++ 48, 49, 50, 51, 52, 53, 54, 55, ++ 56, 57, 58, 59, 60, 61, 62, 63, ++ ++/* 64 - 95 */ ++ 64, 65, 66, 67, 68, 69, 70, 71, ++ 72, 73, 74, 75, 76, 77, 78, 79, ++ 80, 81, 82, 83, 84, 85, 86, 87, ++ 88, 89, 90, 91, 47, 93, 94, 95, ++ ++/* 96 - 127 */ ++ 96, 97, 98, 99, 100, 101, 102, 103, ++104, 105, 106, 107, 108, 109, 110, 111, ++112, 113, 114, 115, 116, 117, 118, 119, ++120, 121, 122, 123, 124, 125, 126, 127, ++ ++/* 128 - 159 */ ++128, 129, 130, 131, 132, 133, 134, 135, ++136, 137, 138, 139, 140, 141, 142, 143, ++144, 145, 146, 147, 148, 149, 150, 151, ++152, 153, 154, 155, 156, 157, 158, 159, ++ ++/* 160 - 191 */ ++160, 33, 236, 237, 164, 92, 124, 167, ++ 34, 169, 170, 171, 172, 173, 174, 175, ++223, 177, 178, 179, 39, 249, 247, 165, ++ 44, 185, 186, 187, 188, 189, 190, 63, ++ ++/* 192 - 223 */ ++ 65, 65, 65, 65, 225, 65, 65, 67, ++ 69, 69, 69, 69, 73, 73, 73, 73, ++ 68, 78, 79, 79, 79, 79, 239, 120, ++ 48, 85, 85, 85, 245, 89, 240, 226, ++ ++/* 224 - 255 */ ++ 97, 97, 97, 97, 225, 97, 97, 99, ++101, 101, 101, 101, 105, 105, 105, 105, ++111, 110, 111, 111, 111, 111, 239, 253, ++ 48, 117, 117, 117, 245, 121, 240, 255 ++ ++}; +Index: linux-2.6.30.9/drivers/lcd-linux/commands.h +=================================================================== +--- /dev/null 1970-01-01 00:00:00.000000000 +0000 ++++ linux-2.6.30.9/drivers/lcd-linux/commands.h 2009-11-24 02:01:42.000000000 +0100 +@@ -0,0 +1,77 @@ ++/* commands.h ++ * ++ * ++ * ++ * LCD-Linux: ++ * Driver for HD44780 compatible displays connected to the parallel port. ++ * ++ * HD44780 commands. ++ * ++ * Copyright (C) 2004 - 2007 Mattia Jona-Lasinio (mjona@users.sourceforge.net) ++ * ++ * This program is free software; you can redistribute it and/or modify ++ * it under the terms of the GNU General Public License as published by ++ * the Free Software Foundation; either version 2 of the License, or ++ * (at your option) any later version. ++ * ++ * This program is distributed in the hope that it will be useful, ++ * but WITHOUT ANY WARRANTY; without even the implied warranty of ++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the ++ * GNU General Public License for more details. ++ * ++ * You should have received a copy of the GNU General Public License ++ * along with this program; if not, write to the Free Software ++ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA ++ * ++ */ ++ ++#ifndef HD44780_COMMANDS_H ++#define HD44780_COMMANDS_H ++ ++/*** HD44780 Command Set ***/ ++ ++/* Clear Display*/ ++#define CLR_DISP 0x01 /* Clear entire display; cursor at row 0, column 0 */ ++ ++/* Return Home */ ++#define RET_HOME 0x02 /* Cursor at row 0, column 0; display content doesn't change */ ++ ++/* Entry Mode Set */ ++#define ENTRY_MODE_SET 0x04 ++#define DISP_SHIFT_ON (ENTRY_MODE_SET | 0x01) /* Shift display, not cursor after data write */ ++#define DISP_SHIFT_OFF (ENTRY_MODE_SET | 0x00) /* Shift cursor, not display after data write */ ++#define CURS_INC (ENTRY_MODE_SET | 0x02) /* Shift on the right after data read/write */ ++#define CURS_DEC (ENTRY_MODE_SET | 0x00) /* Shift on the left after data read/write */ ++ ++/* Display on/off Control */ ++#define DISP_ONOFF_CNTR 0x08 ++#define BLINK_ON (DISP_ONOFF_CNTR | 0x01) /* Cursor blinking on */ ++#define BLINK_OFF (DISP_ONOFF_CNTR | 0x00) /* Cursor blinking off */ ++#define CURS_ON (DISP_ONOFF_CNTR | 0x02) /* Display Cursor */ ++#define CURS_OFF (DISP_ONOFF_CNTR | 0x00) /* Hide Cursor */ ++#define DISP_ON (DISP_ONOFF_CNTR | 0x04) /* Turn on display updating */ ++#define DISP_OFF (DISP_ONOFF_CNTR | 0x00) /* Freeze display content */ ++ ++/* Cursor or Display Shift */ ++#define CURS_DISP_SHIFT 0x10 ++#define SHIFT_RIGHT (CURS_DISP_SHIFT | 0x04) /* Shift on the right */ ++#define SHIFT_LEFT (CURS_DISP_SHIFT | 0x00) /* Shift on the left */ ++#define SHIFT_DISP (CURS_DISP_SHIFT | 0x08) /* Shift display */ ++#define SHIFT_CURS (CURS_DISP_SHIFT | 0x00) /* Shift cursor */ ++ ++/* Function Set */ ++#define FUNC_SET 0x20 ++#define FONT_5X10 (FUNC_SET | 0x04) /* Select 5x10 dots font */ ++#define FONT_5X8 (FUNC_SET | 0x00) /* Select 5x8 dots font */ ++#define DISP_2_LINES (FUNC_SET | 0x08) /* Select 2 lines display (only 5x8 font allowed) */ ++#define DISP_1_LINE (FUNC_SET | 0x00) /* Select 1 line display */ ++#define BUS_8_BITS (FUNC_SET | 0x10) /* Set 8 data bits */ ++#define BUS_4_BITS (FUNC_SET | 0x00) /* Set 4 data bits */ ++ ++/* Set CGRAM Address */ ++#define CGRAM_IO 0x40 /* Base CGRAM address */ ++ ++/* Set DDRAM Address */ ++#define DDRAM_IO 0x80 /* Base DDRAM address */ ++ ++#endif /* commands included */ +Index: linux-2.6.30.9/drivers/lcd-linux/config.h +=================================================================== +--- /dev/null 1970-01-01 00:00:00.000000000 +0000 ++++ linux-2.6.30.9/drivers/lcd-linux/config.h 2009-11-24 02:01:42.000000000 +0100 +@@ -0,0 +1,73 @@ ++/* config.h ++ * ++ * ++ * ++ * Configure file for LCD-Linux. Here you must specify your hardware setup and ++ * timings constants. The default values will probably be right for you. ++ * ++ * Copyright (C) 2005 - 2007 Mattia Jona-Lasinio (mjona@users.sourceforge.net) ++ * ++ * This program is free software; you can redistribute it and/or modify ++ * it under the terms of the GNU General Public License as published by ++ * the Free Software Foundation; either version 2 of the License, or ++ * (at your option) any later version. ++ * ++ * This program is distributed in the hope that it will be useful, ++ * but WITHOUT ANY WARRANTY; without even the implied warranty of ++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the ++ * GNU General Public License for more details. ++ * ++ * You should have received a copy of the GNU General Public License ++ * along with this program; if not, write to the Free Software ++ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA ++ * ++ * ++ */ ++ ++/* Setup the default user defined characters in CGRAM */ ++#include "cgram/default.h" ++ ++/* Don't modify the default timing constants ++ * unless you know what you are doing. ++ */ ++ ++/* Execution times (in microseconds) */ ++#define T_READ 60 /* Read execution time (min 43 us) */ ++#define T_WRITE 60 /* Write execution time (min 43 us) */ ++#define T_BF 2 /* Busy flag polling time (min 1 us) */ ++ ++/* Timings in nanoseconds */ ++#define T_AS 200 /* Address set-up time (min 140 ns) */ ++#define T_EH 500 /* Enable high time (min 450 ns) */ ++#define T_EL 600 /* Enable low time (min 500 ns) */ ++ ++/* Various constants */ ++#define DFLT_NUM_CNTR 1 /* Default number of controllers the display has */ ++#define DFLT_CNTR_ROWS 2 /* Default number of rows per controller */ ++#define DFLT_CNTR_COLS 16 /* Default number of columns the display has */ ++#define DFLT_VS_ROWS 25 /* Default number of rows for the virtual screen */ ++#define DFLT_VS_COLS 80 /* Default number of columns for the virtual screen */ ++#define DFLT_TABSTOP 3 /* Default length of tabs */ ++#define DFLT_FLAGS (HD44780_CHECK_BF | HD44780_4BITS_BUS ) /* Default flags */ ++ ++#define MAX_CNTR_ROWS 4 /* The HD44780 supports up to 4 lines as a fake 2 lines mode */ ++#define MAX_CNTR_COLS 80 /* The HD44780 supports up to 80 characters (1*80; 2*40; etc) */ ++ ++#define SETUP 4 ++#define HIGH_NIBBLE_WRITE(x) (((x) >> (4-SETUP)) & (0x0f << SETUP)) ++#define LOW_NIBBLE_WRITE(x) (((x) << SETUP) & (0x0f << SETUP)) ++#define HIGH_NIBBLE_READ(x) (((x) & (0x0f << SETUP)) << (4-SETUP)) ++#define LOW_NIBBLE_READ(x) (((x) & (0x0f << SETUP)) >> SETUP) ++ ++ ++#define SIMONE_LCD_RS EP93XX_GPIO_LINE_A(2) /* OUT */ ++#define SIMONE_LCD_RD EP93XX_GPIO_LINE_A(3) /* OUT */ ++#define SIMONE_LCD_EN EP93XX_GPIO_LINE_B(4) /* EGPIO12 OUT */ ++#define SIMONE_LCD_BCKLIGHT EP93XX_GPIO_LINE_B(5) /* EGPIO13 OUT */ ++ ++#define SIMONE_LCD_DATA0 EP93XX_GPIO_LINE_A(4) ++#define SIMONE_LCD_DATA1 EP93XX_GPIO_LINE_A(5) ++#define SIMONE_LCD_DATA2 EP93XX_GPIO_LINE_A(6) ++#define SIMONE_LCD_DATA3 EP93XX_GPIO_LINE_A(7) ++ ++ +Index: linux-2.6.30.9/drivers/lcd-linux/hd44780.c +=================================================================== +--- /dev/null 1970-01-01 00:00:00.000000000 +0000 ++++ linux-2.6.30.9/drivers/lcd-linux/hd44780.c 2009-11-24 02:05:29.000000000 +0100 +@@ -0,0 +1,860 @@ ++/* hd44780.c ++ * ++ * ++ * ++ * LCD-Linux: ++ * Driver for HD44780 compatible displays connected to the parallel port. ++ * ++ * Copyright (C) 2005 - 2007 Mattia Jona-Lasinio (mjona@users.sourceforge.net) ++ * Adapted to Sim.One Hardware by Nuccio Raciti (raciti.nuccio@gmail.com) ++ * ++ * This program is free software; you can redistribute it and/or modify ++ * it under the terms of the GNU General Public License as published by ++ * the Free Software Foundation; either version 2 of the License, or ++ * (at your option) any later version. ++ * ++ * This program is distributed in the hope that it will be useful, ++ * but WITHOUT ANY WARRANTY; without even the implied warranty of ++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the ++ * GNU General Public License for more details. ++ * ++ * You should have received a copy of the GNU General Public License ++ * along with this program; if not, write to the Free Software ++ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA ++ * ++ */ ++ ++ ++#include <linux/autoconf.h> ++ ++ ++#ifdef CONFIG_PROC_FS ++#define USE_PROC ++#else ++#undef USE_PROC ++#endif ++ ++#include <linux/bitops.h> ++#include <linux/kernel.h> ++#include <linux/module.h> ++ ++#include <linux/delay.h> ++#include <linux/fs.h> ++ ++#include <asm/uaccess.h> ++#include <linux/init.h> ++ ++#include <asm/io.h> ++#include <linux/ioport.h> ++#include <asm/gpio.h> ++ ++#ifdef USE_PROC ++#include <linux/proc_fs.h> ++#endif ++ ++#define LCD_LINUX_MAIN ++#include <linux/hd44780.h> ++ ++#include "charmap.h" ++#include "commands.h" ++#include "config.h" ++ ++/** Function prototypes **/ ++static void read_display(unsigned char *byte, unsigned char bitmask); ++static void write_display(unsigned char byte, unsigned char bitmask); ++ ++/* Initialization */ ++static int hd44780_validate_driver(void); ++static int hd44780_init_port(void); ++static int hd44780_cleanup_port(void); ++static int hd44780_init_display(void); ++static int hd44780_cleanup_display(void); ++ ++/* Write */ ++static void hd44780_address_mode(int); ++static void hd44780_clear_display(void); ++static void hd44780_write_char(unsigned int, unsigned short); ++static void hd44780_write_cgram_char(unsigned char, unsigned char *); ++ ++/* Read */ ++static void check_bf(unsigned char); ++static void hd44780_read_char(unsigned int, unsigned short *); ++static void hd44780_read_cgram_char(unsigned char, unsigned char *); ++ ++/* Input handling */ ++static int hd44780_handle_custom_char(unsigned int); ++static int hd44780_handle_custom_ioctl(unsigned int,unsigned long , unsigned int); ++ ++/* Proc operations */ ++#ifdef USE_PROC ++static void create_proc_entries(void); ++static void remove_proc_entries(void); ++#endif ++ ++/* hd44780 access */ ++#define ACCESS_TO_READ 0 ++#define ACCESS_TO_WRITE 1 ++#define ACCESS_TO_DATA 2 ++ ++/* hd44780_flags */ ++#define _CHECK_BF 0 /* Do busy-flag checking */ ++#define _4BITS_BUS 1 /* The bus is 4 bits long */ ++#define _5X10_FONT 2 /* Use 5x10 font */ ++#define CURSOR_BLINK 3 /* Make the cursor blinking */ ++#define SHOW_CURSOR 4 /* Make the cursor visible */ ++#define DISPLAY_ON 5 /* Display status: on or off */ ++#define INC_ADDR 6 /* Increment address after data read/write */ ++#define BACKLIGHT 7 /* Display backlight: on or off */ ++#define CGRAM_STATE 9 /* Controller status bitmask (bits 9->15): DDRAM or CGRAM access */ ++#define ESC_MASK 0x00ff0000 ++#define PROC_MASK 0x0f000000 ++ ++#define SET_STATE(state, mask) (hd44780_flags = (hd44780_flags & ~(mask)) | ((state) & (mask))) ++#define SET_ESC_STATE(state) SET_STATE((state) << 16, ESC_MASK) ++#define SET_PROC_LEVEL(level) SET_STATE((level) << 24, PROC_MASK) ++#define ESC_STATE ((hd44780_flags & ESC_MASK) >> 16) ++#define PROC_LEVEL ((hd44780_flags & PROC_MASK) >> 24) ++ ++/* globals */ ++static unsigned int disp_size; /* Display size (rows*columns) */ ++static unsigned int disp_offset[1]; /* Physical cursor position on the display */ ++static unsigned long hd44780_flags; /* Driver flags for internal use only */ ++ ++static struct lcd_parameters par = { ++ .name = HD44780_STRING, ++ .minor = HD44780_MINOR, ++ .flags = DFLT_FLAGS, ++ .tabstop = DFLT_TABSTOP, ++ .num_cntr = 1, ++ .cntr_rows = DFLT_CNTR_ROWS, ++ .cntr_cols = DFLT_CNTR_COLS, ++ .vs_rows = DFLT_VS_ROWS, ++ .vs_cols = DFLT_VS_COLS, ++ .cgram_chars = 8, ++ .cgram_bytes = 8, ++ .cgram_char0 = 0, ++}; ++/* End of globals */ ++ ++#ifdef MODULE ++#include <linux/device.h> ++MODULE_ALIAS_CHARDEV(LCD_MAJOR, HD44780_MINOR); ++#include <linux/kmod.h> ++ ++static unsigned short flags = DFLT_FLAGS; ++static unsigned short tabstop = DFLT_TABSTOP; ++static unsigned short cntr_rows = DFLT_CNTR_ROWS; ++static unsigned short cntr_cols = DFLT_CNTR_COLS; ++static unsigned short vs_rows = DFLT_VS_ROWS; ++static unsigned short vs_cols = DFLT_VS_COLS; ++static unsigned short minor = HD44780_MINOR; ++ ++MODULE_DESCRIPTION("LCD SimOne driver for HD44780 compatible controllers."); ++MODULE_AUTHOR("Nuccio Raciti (raciti.nuccio@gmail.com)"); ++#ifdef MODULE_LICENSE ++MODULE_LICENSE("GPL"); ++#endif ++module_param(flags, ushort, 0444); ++module_param(cntr_rows, ushort, 0444); ++module_param(cntr_cols, ushort, 0444); ++module_param(vs_rows, ushort, 0444); ++module_param(vs_cols, ushort, 0444); ++module_param(tabstop, ushort, 0444); ++module_param(minor, ushort, 0444); ++ ++MODULE_PARM_DESC(flags, "Various flags (see Documentation)"); ++MODULE_PARM_DESC(cntr_rows, "Number of rows per controller on the LCD: 1, 2, 4 (default: " string(DFLT_CNTR_ROWS) ")"); ++MODULE_PARM_DESC(cntr_cols, "Number of columns on the LCD (default: " string(DFLT_CNTR_COLS) ", max: " string(MAX_CNTR_COLS) ")"); ++MODULE_PARM_DESC(vs_rows, "Number of rows of the virtual screen (default: " string(DFLT_VS_ROWS) ")"); ++MODULE_PARM_DESC(vs_cols, "Number of columns of the virtual screen (default: " string(DFLT_VS_COLS) ")"); ++MODULE_PARM_DESC(tabstop, "Tab character length (default: " string(DFLT_TABSTOP) ")"); ++MODULE_PARM_DESC(minor, "Assigned minor number (default: " string(HD44780_MINOR) ")"); ++#else ++ ++/* ++ * Parse boot command line ++ * ++ * hd44780=cntr_rows,cntr_cols,vs_rows,vs_cols,flags,minor,tabstop ++ */ ++static int __init hd44780_boot_init(char *cmdline) ++{ ++ char *str = cmdline; ++ int idx = 0; ++ unsigned short *args[] = { ++ &par.cntr_rows, ++ &par.cntr_cols, ++ &par.vs_rows, ++ &par.vs_cols, ++ &par.flags, ++ &par.num_cntr, ++ &par.minor, ++ &par.tabstop, ++ }; ++ ++ while (*cmdline && idx < (sizeof(args)/sizeof(unsigned short *))) { ++ switch (*str) { ++ case ',': ++ *str++ = 0; ++ case 0: ++ if (strlen(cmdline)) ++ *args[idx] = simple_strtoul(cmdline, NULL, 0); ++ ++idx; ++ cmdline = str; ++ break; ++ default: ++ ++str; ++ break; ++ } ++ } ++ ++ return (1); ++} ++ ++__setup("hd44780=", hd44780_boot_init); ++#endif /* MODULE */ ++ ++/* Macros for iterator handling */ ++static inline unsigned int iterator_inc_(unsigned int iterator, const unsigned int module) ++{ ++ return ((++iterator)%module); ++} ++ ++static inline unsigned int iterator_dec_(unsigned int iterator, const unsigned int module) ++{ ++ return (iterator ? --iterator : module-1); ++} ++ ++#define iterator_inc(iterator, module) (iterator = iterator_inc_(iterator, module)) ++#define iterator_dec(iterator, module) (iterator = iterator_dec_(iterator, module)) ++ ++static inline void set_lines(unsigned char bitmask) ++{ ++ gpio_set_value(SIMONE_LCD_EN, 0); /* Disable */ ++ ++ if(bitmask & ACCESS_TO_WRITE ) { ++ gpio_direction_output (SIMONE_LCD_DATA0 , 0); ++ gpio_direction_output (SIMONE_LCD_DATA1 , 0); ++ gpio_direction_output (SIMONE_LCD_DATA2 , 0); ++ gpio_direction_output (SIMONE_LCD_DATA3 , 0); ++ gpio_set_value(SIMONE_LCD_RD, 0); /* Write */ ++ } else { ++ ++ gpio_direction_input (SIMONE_LCD_DATA0); ++ gpio_direction_input (SIMONE_LCD_DATA1); ++ gpio_direction_input (SIMONE_LCD_DATA2); ++ gpio_direction_input (SIMONE_LCD_DATA3); ++ gpio_set_value(SIMONE_LCD_RD, 1); /* Read */ ++ } ++ ++ if(bitmask & ACCESS_TO_DATA ) ++ gpio_set_value(SIMONE_LCD_RS, 1); /* Data */ ++ else ++ gpio_set_value(SIMONE_LCD_RS, 0); /* Cmds*/ ++ ++ if(test_bit(BACKLIGHT, &hd44780_flags)) ++ gpio_set_value(SIMONE_LCD_BCKLIGHT, 1); ++ else ++ gpio_set_value(SIMONE_LCD_BCKLIGHT, 0); ++} ++ ++ ++/* Low level read from the display */ ++static inline unsigned char __read_display(unsigned char bitmask) ++{ ++ unsigned char byte; ++ ++ set_lines (bitmask); ++ ++ ndelay(T_AS); /* Address set-up time */ ++ gpio_set_value(SIMONE_LCD_EN, 1); /* Enable */ ++ ndelay(T_EH);/* Enable high time */ ++ ++ byte = (gpio_get_value(SIMONE_LCD_DATA0) << 4); ++ byte |= (gpio_get_value(SIMONE_LCD_DATA1) << 5); ++ byte |= (gpio_get_value(SIMONE_LCD_DATA2) << 6); ++ byte |= (gpio_get_value(SIMONE_LCD_DATA3) << 7); ++ ++ gpio_set_value(SIMONE_LCD_EN, 0); /* Disable */ ++ ++ ndelay(T_EL); /* Enable low time */ ++ ++ ++ return (byte); ++ ++} ++ ++/* Low level write to the display */ ++static inline void __write_display(unsigned char data, unsigned char bitmask) ++{ ++ set_lines(bitmask); ++ ++ if(data & 0x10) ++ gpio_set_value(SIMONE_LCD_DATA0, 1); ++ else ++ gpio_set_value(SIMONE_LCD_DATA0, 0); ++ ++ if(data & 0x20) ++ gpio_set_value(SIMONE_LCD_DATA1, 1); ++ else ++ gpio_set_value(SIMONE_LCD_DATA1, 0); ++ ++ if(data & 0x40) ++ gpio_set_value(SIMONE_LCD_DATA2, 1); ++ else ++ gpio_set_value(SIMONE_LCD_DATA2, 0); ++ ++ if(data & 0x80) ++ gpio_set_value(SIMONE_LCD_DATA3, 1); ++ else ++ gpio_set_value(SIMONE_LCD_DATA3, 0); ++ ++ ndelay(T_AS); /* Address set-up time */ ++ gpio_set_value(SIMONE_LCD_EN, 1); ++ ndelay(T_EH); /* Enable high time */ ++ ++ gpio_set_value(SIMONE_LCD_EN, 0); /* Disable */ ++ ndelay(T_EL); /* Enable low time */ ++} ++ ++ ++/* Read data from the display (4 bit bus, check busy flag) */ ++static void read_display (unsigned char *byte,unsigned char bitmask) ++{ ++ if(bitmask) check_bf(bitmask); ++ *byte = HIGH_NIBBLE_READ(__read_display(bitmask)); ++ if(bitmask) check_bf(bitmask); ++ *byte |= LOW_NIBBLE_READ(__read_display(bitmask)); ++} ++ ++ ++/* Output commands or data to the display (4 bit bus, check busy flag) */ ++static void write_display(unsigned char byte,unsigned char bitmask) ++{ ++ check_bf(bitmask); ++ __write_display(HIGH_NIBBLE_WRITE(byte),bitmask); ++ check_bf(bitmask); ++ __write_display(LOW_NIBBLE_WRITE(byte),bitmask); ++} ++ ++ ++/* Read Address Counter AC from the display */ ++static unsigned char read_ac(unsigned char bitmask) ++{ ++ unsigned char byte; ++ ++ read_display(&byte, bitmask); ++ ++ return (byte); ++} ++ ++ ++/* Do busy-flag check */ ++static void check_bf(unsigned char bitmask) ++{ ++ unsigned int timeout = 20; ++ static unsigned char do_check_bf = 5; ++ gpio_set_value(SIMONE_LCD_EN, 0); /* Disable */ ++ ++ gpio_direction_input (SIMONE_LCD_DATA0); ++ gpio_direction_input (SIMONE_LCD_DATA1); ++ gpio_direction_input (SIMONE_LCD_DATA2); ++ gpio_direction_input (SIMONE_LCD_DATA3); ++ ++ gpio_set_value(SIMONE_LCD_RD, 1); /* Read */ ++ gpio_set_value(SIMONE_LCD_RS, 0); /* Instru */ ++ ++ ndelay(T_AS); /* Address set-up time */ ++ gpio_set_value(SIMONE_LCD_EN, 1); /* Enable */ ++ ndelay(T_EH);/* Enable high time */ ++ ++ do{ ++ udelay(T_BF); ++ } while (gpio_get_value(SIMONE_LCD_DATA3) && --timeout); ++ ++ if (! timeout) { ++ if (! --do_check_bf) { ++ printk(KERN_NOTICE "hd44780 error: is the LCD connected?\n"); ++ } ++ } ++ ++ gpio_set_value(SIMONE_LCD_EN, 0); /* Disable */ ++ ++ ndelay(T_EL); /* Enable low time */ ++} ++ ++/* Send commands to the display */ ++static void write_command(unsigned char command) ++{ ++ write_display(command, ACCESS_TO_WRITE); ++ ++ if (command <= 0x03) ++ mdelay(2); ++} ++ ++static inline void set_cursor(unsigned int offset) ++{ ++ unsigned int disp_number = offset/disp_size; ++ unsigned int local_offset = offset%disp_size; ++ ++ if (disp_offset[disp_number] != local_offset || test_bit(CGRAM_STATE+disp_number, &hd44780_flags)) { ++ unsigned int disp_row = local_offset/par.cntr_cols; ++ unsigned int disp_column = local_offset%par.cntr_cols; ++ ++ write_command(DDRAM_IO | ((disp_row%2)*0x40) | (((disp_row >= 2)*par.cntr_cols)+disp_column)); ++ clear_bit(CGRAM_STATE+disp_number, &hd44780_flags); ++ disp_offset[disp_number] = local_offset; ++ } ++} ++ ++/* HD44780 DDRAM addresses are consecutive only when ++ * the cursor moves on the same row of the display. ++ * Every time the row of the cursor changes we invalidate ++ * the cursor position to force hardware cursor repositioning. ++ */ ++static inline void mov_cursor(unsigned int disp_number) ++{ ++ if (test_bit(INC_ADDR, &hd44780_flags)) { ++ iterator_inc(disp_offset[disp_number], disp_size); ++ if (disp_offset[disp_number]%par.cntr_cols == 0) ++ disp_offset[disp_number] = disp_size; ++ } else { ++ iterator_dec(disp_offset[disp_number], disp_size); ++ if (disp_offset[disp_number]%par.cntr_cols == par.cntr_cols-1) ++ disp_offset[disp_number] = disp_size; ++ } ++} ++ ++static struct lcd_driver hd44780 = { ++ .read_char = hd44780_read_char, ++ .read_cgram_char = hd44780_read_cgram_char, ++ .write_char = hd44780_write_char, ++ .write_cgram_char = hd44780_write_cgram_char, ++ .address_mode = hd44780_address_mode, ++ .clear_display = hd44780_clear_display, ++ .validate_driver = hd44780_validate_driver, ++ .init_display = hd44780_init_display, ++ .cleanup_display = hd44780_cleanup_display, ++ .init_port = hd44780_init_port, ++ .cleanup_port = hd44780_cleanup_port, ++ .handle_custom_char = hd44780_handle_custom_char, ++ .handle_custom_ioctl = hd44780_handle_custom_ioctl, ++ ++ .charmap = charmap, ++}; ++ ++static void hd44780_read_char(unsigned int offset, unsigned short *data) ++{ ++ unsigned int disp_number = offset/disp_size; ++ unsigned char tmp; ++ ++ set_cursor(offset); ++ read_display(&tmp, ACCESS_TO_DATA); ++ *data = tmp; ++ mov_cursor(disp_number); ++} ++ ++static void hd44780_read_cgram_char(unsigned char index, unsigned char *pixels) ++{ ++ unsigned int i; ++ ++ write_command(CGRAM_IO | (index << 3)); ++ set_bit(CGRAM_STATE+0, &hd44780_flags); ++ ++ for (i = 0; i < 8; ++i) { ++ read_display(pixels+i, ACCESS_TO_DATA ); ++ pixels[i] &= 0x1f; ++ } ++} ++ ++static void hd44780_write_char(unsigned int offset, unsigned short data) ++{ ++ unsigned int disp_number = offset/disp_size; ++ ++ set_cursor(offset); ++ write_display(data & 0xff, ACCESS_TO_WRITE | ACCESS_TO_DATA ); ++ mov_cursor(disp_number); ++} ++ ++static void hd44780_write_cgram_char(unsigned char index, unsigned char *pixels) ++{ ++ unsigned int i; ++ ++ /* Move address pointer to index in CGRAM */ ++ write_command(CGRAM_IO | (index << 3)); ++ ++ set_bit(CGRAM_STATE+0, &hd44780_flags); ++ ++ for (i = 0; i < 8; ++i) { ++ pixels[i] &= 0x1f; ++ write_display(pixels[i], ACCESS_TO_WRITE | ACCESS_TO_DATA ); ++ } ++} ++ ++/* Increment/decrement address mode after a data read/write */ ++static void hd44780_address_mode(int mode) ++{ ++ if (mode > 0 && ! test_bit(INC_ADDR, &hd44780_flags)) { ++ write_command(CURS_INC | DISP_SHIFT_OFF); ++ set_bit(INC_ADDR, &hd44780_flags); ++ } else if (mode < 0 && test_bit(INC_ADDR, &hd44780_flags)) { ++ write_command(CURS_DEC | DISP_SHIFT_OFF); ++ clear_bit(INC_ADDR, &hd44780_flags); ++ } ++} ++ ++static void hd44780_clear_display(void) ++{ ++ write_command(CLR_DISP); ++ if (! test_bit(INC_ADDR, &hd44780_flags)) ++ write_command(CURS_DEC | DISP_SHIFT_OFF); ++ memset(disp_offset, 0, sizeof(disp_offset)); ++} ++ ++static int hd44780_validate_driver(void) ++{ ++ if (par.cntr_rows != 1 && par.cntr_rows != 2 && par.cntr_rows != 4) ++ par.cntr_rows = DFLT_CNTR_ROWS; ++ ++ if (par.cntr_rows != 1) ++ par.flags &= ~HD44780_5X10_FONT; ++ ++ ++ if (! par.cntr_cols || par.cntr_cols > MAX_CNTR_COLS/par.cntr_rows) ++ par.cntr_cols = MAX_CNTR_COLS/par.cntr_rows; ++ ++ disp_size = par.cntr_rows*par.cntr_cols; ++ ++ /* These parameters depend on the hardware and cannot be changed */ ++ par.cgram_chars = 8; ++ par.cgram_bytes = 8; ++ par.cgram_char0 = 0; ++ ++ return (0); ++} ++ ++/* Send init commands to the display */ ++static void write_init_command(void) ++{ ++ unsigned char command = 0x30; ++ ++ __write_display(HIGH_NIBBLE_WRITE(command), ACCESS_TO_WRITE); ++ mdelay(20); /* Wait more than 4.1 ms */ ++ __write_display(HIGH_NIBBLE_WRITE(command), ACCESS_TO_WRITE); ++ udelay(200); /* Wait more than 100 us */ ++ __write_display(HIGH_NIBBLE_WRITE(command), ACCESS_TO_WRITE); ++ udelay(200); /* Wait more than 100 us */ ++ command = BUS_4_BITS; ++ command |= ((par.cntr_rows == 1) ? DISP_1_LINE : DISP_2_LINES); ++ command |= (test_bit(_5X10_FONT, &hd44780_flags) ? FONT_5X10 : FONT_5X8); ++ write_command(command); ++ /* set_bit(BACKLIGHT, &hd44780_flags); */ ++} ++ ++static int hd44780_init_display(void) ++{ ++ if (par.flags & HD44780_CHECK_BF) ++ set_bit(_CHECK_BF, &hd44780_flags); ++ else ++ clear_bit(_CHECK_BF, &hd44780_flags); ++ ++ if (par.flags & HD44780_4BITS_BUS) ++ set_bit(_4BITS_BUS, &hd44780_flags); ++ else ++ clear_bit(_4BITS_BUS, &hd44780_flags); ++ ++ if (par.flags & HD44780_5X10_FONT) ++ set_bit(_5X10_FONT, &hd44780_flags); ++ else ++ clear_bit(_5X10_FONT, &hd44780_flags); ++ ++ write_init_command(); ++ ++ hd44780_clear_display(); ++ hd44780_address_mode(1); ++ write_command(DISP_ON | CURS_OFF | BLINK_OFF); ++ set_bit(DISPLAY_ON, &hd44780_flags); ++ clear_bit(SHOW_CURSOR, &hd44780_flags); ++ clear_bit(CURSOR_BLINK, &hd44780_flags); ++ ++ /* Set the CGRAM to default values */ ++ hd44780_write_cgram_char(0, cg0); ++ hd44780_write_cgram_char(1, cg1); ++ hd44780_write_cgram_char(2, cg2); ++ hd44780_write_cgram_char(3, cg3); ++ hd44780_write_cgram_char(4, cg4); ++ hd44780_write_cgram_char(5, cg5); ++ hd44780_write_cgram_char(6, cg6); ++ hd44780_write_cgram_char(7, cg7); ++ init_charmap(); ++ ++ return (0); ++} ++ ++static int hd44780_cleanup_display(void) ++{ ++ hd44780_clear_display(); ++ ++ return (0); ++} ++ ++static int hd44780_init_port(void) ++{ ++ gpio_direction_output (SIMONE_LCD_BCKLIGHT, 0); ++ gpio_direction_output (SIMONE_LCD_RD , 0); ++ gpio_direction_output (SIMONE_LCD_RS , 0); ++ gpio_direction_output (SIMONE_LCD_EN , 0); ++ gpio_set_value(SIMONE_LCD_EN, 0); /* Disable */ ++ ++ return (0); ++} ++ ++static int hd44780_cleanup_port(void) ++{ ++ ++ gpio_direction_input (SIMONE_LCD_BCKLIGHT); ++ gpio_direction_input (SIMONE_LCD_RD); ++ gpio_direction_input (SIMONE_LCD_RS); ++ gpio_direction_input (SIMONE_LCD_EN); ++ gpio_direction_input (SIMONE_LCD_DATA0); ++ gpio_direction_input (SIMONE_LCD_DATA1); ++ gpio_direction_input (SIMONE_LCD_DATA2); ++ gpio_direction_input (SIMONE_LCD_DATA3); ++ return (0); ++} ++ ++static void display_attr(unsigned char input) ++{ ++ unsigned char command; ++ ++ switch (ESC_STATE) { ++ case 'a': /* Turn on/off the display cursor */ ++ if (input == '1') ++ set_bit(SHOW_CURSOR, &hd44780_flags); ++ else if (input == '0') ++ clear_bit(SHOW_CURSOR, &hd44780_flags); ++ break; ++ case 'b': /* Turn on/off the display cursor blinking */ ++ if (input == '1') ++ set_bit(CURSOR_BLINK, &hd44780_flags); ++ else if (input == '0') ++ clear_bit(CURSOR_BLINK, &hd44780_flags); ++ break; ++ case 'h': /* Turn on/off the display */ ++ if (input == '1') ++ set_bit(DISPLAY_ON, &hd44780_flags); ++ else if (input == '0') ++ clear_bit(DISPLAY_ON, &hd44780_flags); ++ break; ++ } ++ ++ command = (test_bit(DISPLAY_ON, &hd44780_flags) ? DISP_ON : DISP_OFF); ++ command |= (test_bit(SHOW_CURSOR, &hd44780_flags) ? CURS_ON : CURS_OFF); ++ command |= (test_bit(CURSOR_BLINK, &hd44780_flags) ? BLINK_ON : BLINK_OFF); ++ ++ if (ESC_STATE == 'h') ++ write_command(command); ++} ++ ++static int hd44780_handle_custom_char(unsigned int _input) ++{ ++ unsigned char input = _input & 0xff; ++ ++ if (_input & (~0xff)) { ++ switch (ESC_STATE) { ++ case 'a': /* Turn on/off the display cursor */ ++ case 'b': /* Turn on/off the display cursor blinking */ ++ case 'h': /* Turn on/off the the display */ ++ display_attr(input); ++ return (0); ++ case 'l': /* Turn on/off the backlight */ ++ if (input == '1') ++ set_bit(BACKLIGHT, &hd44780_flags); ++ else if (input == '0') ++ clear_bit(BACKLIGHT, &hd44780_flags); ++ read_ac(ACCESS_TO_READ); ++ return (0); ++ } ++ } ++ ++ switch (input) { ++ case 'a': /* Turn on/off the display cursor */ ++ case 'b': /* Turn on/off the display cursor blinking */ ++ case 'h': /* Turn on/off the display */ ++ case 'l': /* Turn on/off the backlight */ ++ SET_ESC_STATE(input); ++ return (1); ++ case 'd': /* Shift display cursor Right */ ++ write_command(SHIFT_CURS | SHIFT_RIGHT); ++ return (0); ++ case 'e': /* Shift display cursor Left */ ++ write_command(SHIFT_CURS | SHIFT_LEFT); ++ return (0); ++ case 'f': /* Shift display Right */ ++ write_command(SHIFT_DISP | SHIFT_RIGHT); ++ return (0); ++ case 'g': /* Shift display Left */ ++ write_command(SHIFT_DISP | SHIFT_LEFT); ++ return (0); ++ } ++ ++ return (-1); ++} ++ ++static int hd44780_handle_custom_ioctl(unsigned int num, unsigned long arg, unsigned int user_space) ++{ ++ unsigned char *buffer = (unsigned char *)arg; ++ ++ if (num != HD44780_READ_AC) ++ return (-ENOIOCTLCMD); ++ ++ if (user_space) ++ put_user(read_ac(ACCESS_TO_READ), buffer); ++ else ++ buffer[0] = read_ac(ACCESS_TO_READ); ++ ++ return (0); ++} ++ ++#ifdef USE_PROC ++static int hd44780_proc_status(char *buffer, char **start, off_t offset, int size, int *eof, void *data) ++{ ++ char *temp = buffer; ++ ++ /* Print display configuration */ ++ temp += sprintf(temp, ++ "Interface:\t%u bits\n" ++ "Display rows:\t%d\n" ++ "Display cols:\t%d\n" ++ "Screen rows:\t%d\n" ++ "Screen cols:\t%d\n" ++ "Read:\t\t%sabled\n" ++ "Busy flag chk:\t%sabled\n" ++ "Assigned minor:\t%u\n", ++ (test_bit(_4BITS_BUS, &hd44780_flags) ? 4 : 8), ++ par.cntr_rows, par.cntr_cols, ++ par.vs_rows, par.vs_cols, ++ (hd44780.read_char ? "En" : "Dis"), ++ (test_bit(_CHECK_BF, &hd44780_flags) ? "En" : "Dis"), ++ par.minor); ++ ++ return (temp-buffer); ++} ++ ++static int hd44780_proc_cgram(char *buffer, char **start, off_t offset, int size, int *eof, void *data) ++{ ++ char *temp = buffer; ++ unsigned int i; ++ ++ temp += sprintf(temp, "static void init_charmap(void)\n{\n" ++ "\t/*\n" ++ "\t * charmap[char mapped to cg0] = 0;\n" ++ "\t * charmap[char mapped to cg1] = 1;\n" ++ "\t * charmap[char mapped to cg2] = 2;\n" ++ "\t * charmap[char mapped to cg3] = 3;\n" ++ "\t * charmap[char mapped to cg4] = 4;\n" ++ "\t * charmap[char mapped to cg5] = 5;\n" ++ "\t * charmap[char mapped to cg6] = 6;\n" ++ "\t * charmap[char mapped to cg7] = 7;\n" ++ "\t */\n" ++ "}\n\n"); ++ ++ for (i = 0; i < 8; ++i) { ++ unsigned char cgram_buffer[8]; ++ unsigned int j; ++ ++ temp += sprintf(temp, "static unsigned char cg%u[] = { ", i); ++ hd44780_read_cgram_char(i, cgram_buffer); ++ for (j = 0; j < 8; ++j) ++ temp += sprintf(temp, "0x%.2x%s", cgram_buffer[j], (j == 7 ? " };\n" : ", ")); ++ } ++ ++ return (temp-buffer); ++} ++ ++static void create_proc_entries(void) ++{ ++ int count = 0; ++ ++ SET_PROC_LEVEL(count); ++ if (create_proc_read_entry("status", 0, hd44780.driver_proc_root, hd44780_proc_status, NULL) == NULL) { ++ printk(KERN_ERR "hd44780: cannot create /proc/lcd/%s/status\n", par.name); ++ return; ++ } ++ SET_PROC_LEVEL(++count); ++ if (hd44780.read_cgram_char) { ++ if (create_proc_read_entry("cgram.h", 0, hd44780.driver_proc_root, hd44780_proc_cgram, NULL) == NULL) { ++ printk(KERN_ERR "hd44780: cannot create /proc/lcd/%s/cgram.h\n", par.name); ++ return; ++ } ++ SET_PROC_LEVEL(++count); ++ } ++} ++ ++static void remove_proc_entries(void) ++{ ++ switch (PROC_LEVEL) { ++ case 2: ++ remove_proc_entry("cgram.h", hd44780.driver_proc_root); ++ case 1: ++ remove_proc_entry("status", hd44780.driver_proc_root); ++ } ++ SET_PROC_LEVEL(0); ++} ++#endif ++ ++/* Initialization */ ++static int __init hd44780_init_module(void) ++{ ++ int ret; ++ ++#ifdef MODULE ++#ifdef NOT_DEF ++ if ((ret = request_module("lcd-linux"))) { ++ if (ret != -ENOSYS) { ++ printk(KERN_ERR "hd44780: failure while loading module lcd-linux\n"); ++ return (ret); ++ } ++ printk(KERN_ERR "hd44780: your kernel does not have kmod or kerneld support;\n"); ++ printk(KERN_ERR "hd44780: remember to load the lcd-linux module before\n"); ++ printk(KERN_ERR "hd44780: loading the hd44780 module\n"); ++ } ++#endif ++ if (flags != DFLT_FLAGS) par.flags = flags; ++ if (tabstop != DFLT_TABSTOP) par.tabstop = tabstop; ++ if (cntr_rows != DFLT_CNTR_ROWS) par.cntr_rows = cntr_rows; ++ if (cntr_cols != DFLT_CNTR_COLS) par.cntr_cols = cntr_cols; ++ if (vs_rows != DFLT_VS_ROWS) par.vs_rows = vs_rows; ++ if (vs_cols != DFLT_VS_COLS) par.vs_cols = vs_cols; ++ if (minor != HD44780_MINOR) par.minor = minor; ++#endif ++ ++ lcd_driver_setup(&hd44780); ++ if ((ret = lcd_register_driver(&hd44780, &par))) ++ return (ret); ++ ++#ifdef USE_PROC ++ if (hd44780.driver_proc_root) ++ create_proc_entries(); ++#endif ++ ++ printk(KERN_INFO "HD44780 driver (LCD-Linux" HD44780_VERSION ")\n"); ++ printk(KERN_INFO "Nuccio Raciti <raciti.nuccio@gmail.com>\n"); ++ ++ ++ return (0); ++} ++ ++/* Cleanup */ ++ ++static void __exit hd44780_cleanup_module(void) ++{ ++#ifdef USE_PROC ++ if (hd44780.driver_proc_root) ++ remove_proc_entries(); ++#endif ++ ++ lcd_unregister_driver(&hd44780, &par); ++} ++ ++module_init(hd44780_init_module) ++module_exit(hd44780_cleanup_module) +Index: linux-2.6.30.9/drivers/lcd-linux/lcd-linux.c +=================================================================== +--- /dev/null 1970-01-01 00:00:00.000000000 +0000 ++++ linux-2.6.30.9/drivers/lcd-linux/lcd-linux.c 2009-11-24 02:01:42.000000000 +0100 +@@ -0,0 +1,2892 @@ ++/* lcd-linux.c ++ * ++ * ++ * ++ * Software layer to drive LCD displays under Linux. ++ * ++ * Copyright (C) 2005 - 2007 Mattia Jona-Lasinio (mjona@users.sourceforge.net) ++ * ++ * This program is free software; you can redistribute it and/or modify ++ * it under the terms of the GNU General Public License as published by ++ * the Free Software Foundation; either version 2 of the License, or ++ * (at your option) any later version. ++ * ++ * This program is distributed in the hope that it will be useful, ++ * but WITHOUT ANY WARRANTY; without even the implied warranty of ++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the ++ * GNU General Public License for more details. ++ * ++ * You should have received a copy of the GNU General Public License ++ * along with this program; if not, write to the Free Software ++ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA ++ * ++ */ ++ ++#include <linux/version.h> ++ ++#ifndef KERNEL_VERSION ++#define KERNEL_VERSION(a, b, c) (((a) << 16) + ((b) << 8) + (c)) ++#endif ++ ++#ifndef LINUX_VERSION_CODE ++#error - LINUX_VERSION_CODE undefined in 'linux/version.h' ++#endif ++ ++#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 0) ++#include <linux/autoconf.h> ++#else ++#include <linux/config.h> ++#endif ++#ifdef CONFIG_PROC_FS ++#define USE_PROC ++#else ++#undef USE_PROC ++#endif ++ ++#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 26) ++#include <linux/semaphore.h> ++#else ++#include <asm/semaphore.h> ++#endif ++#include <linux/bitops.h> ++#include <linux/kernel.h> ++#include <linux/module.h> ++#include <linux/sched.h> ++ ++#include <linux/fs.h> ++ ++#include <asm/uaccess.h> ++#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 0) ++#include <linux/device.h> ++#endif ++#include <linux/init.h> ++#include <linux/list.h> ++#include <linux/slab.h> ++#include <linux/selection.h> ++#include <linux/vmalloc.h> ++ ++#ifdef USE_PROC ++#include <linux/proc_fs.h> ++#endif ++ ++#define LCD_LINUX_MAIN ++#include <linux/lcd-linux.h> ++ ++/*** struct_flags ***/ ++#define NEED_WRAP 0 /* Next char will trigger a newline */ ++#define DECIM 1 /* Insert mode */ ++#define DECAWM 2 /* Autowrap */ ++#define DECSCNM 3 /* Inverted screen */ ++#define CRLF 4 /* Follow lf, vt, ff, with a cr */ ++#define INC_CURS_POS 5 /* Increment cursor position after data read/write */ ++#define QUES 6 /* CSI Esc sequence contains a question mark */ ++#define USER_SPACE 7 /* If set, the buffer pointed by arg in do_lcd_ioctl() is ++ * assumed to be in user space otherwise it is in kernel space */ ++#define NULL_CHARMAP 8 /* The driver doesn't provide a charmap so the ++ * lcd-linux layer provides one*/ ++#define CAN_DO_COLOR 9 /* The display is color capable */ ++#define WITH_ATTR 10 /* If set, the void * buffer in do_lcd_read/write() contains ++ * attributes and therefore is an unsigned short * otherwise it ++ * is an unsigned char * ++ */ ++ ++/*** attributes ***/ ++#define I_MASK 0x03 /* Intensity (0 = low, 1 = normal, 2 = bright) */ ++#define ULINE 0x04 /* Underlined text */ ++#define REVERSE 0x08 /* Reversed video text */ ++#define BLINK 0x80 /* Blinking text */ ++ ++/*** Color attributes ***/ ++#define FG_MASK 0x0f /* Foreground color */ ++#define BG_MASK 0xf0 /* Background color */ ++ ++/* input states */ ++#define NORMAL 0x00001000 /* Normal mode */ ++#define RAW 0x00002000 /* Raw mode (console emulation disabled) */ ++#define SYN 0x00003000 /* Synchronous Idle mode */ ++#define ESC 0x00004000 /* Escape mode */ ++#define CSI 0x00005000 /* CSI escape mode */ ++#define ESC_G0 0x00006000 /* G0 character set */ ++#define ESC_G1 0x00007000 /* G1 character set */ ++#define ESC_HASH 0x00008000 /* ESC # escape sequence */ ++#define ESC_PERCENT 0x00009000 /* ESC % escape sequence */ ++#define ARG 0x0000a000 /* Waiting for arguments for the lcd-linux layer */ ++#define ARG_DRIVER 0x0000b000 /* Waiting for arguments for the display driver */ ++#define INPUT_MASK 0x0000f000 ++#define ESC_MASK 0x00ff0000 ++#define INIT_MASK 0x0f000000 ++#define PROC_MASK 0xf0000000 ++ ++#define SET_STATE(p, state, mask) ((p)->struct_flags = ((p)->struct_flags & ~(mask)) | ((state) & (mask))) ++#define SET_INPUT_STATE(p, state) SET_STATE(p, state, INPUT_MASK) ++#define SET_ESC_STATE(p, state) SET_STATE(p, (state) << 16, ESC_MASK) ++#define SET_INIT_LEVEL(p, level) SET_STATE(p, (level) << 24, INIT_MASK) ++#define SET_PROC_LEVEL(p, level) SET_STATE(p, (level) << 28, PROC_MASK) ++#define INPUT_STATE(p) ((p)->struct_flags & INPUT_MASK) ++#define ESC_STATE(p) (((p)->struct_flags & ESC_MASK) >> 16) ++#define INIT_LEVEL(p) (((p)->struct_flags & INIT_MASK) >> 24) ++#define PROC_LEVEL(p) (((p)->struct_flags & PROC_MASK) >> 28) ++ ++#define NPAR 16 /* Max number of parameters in CSI escape sequence */ ++#define FLIP_BUF_SIZE (1 << 6) /* Flip buffer size (64 bytes) */ ++ ++struct lcd_struct { ++ struct list_head lcd_list; /* Doubly linked list */ ++ struct semaphore lcd_sem; /* Locks this structure */ ++ struct lcd_driver *driver; /* The driver associated to this struct */ ++ struct lcd_parameters *par; /* The parameters associated to this struct */ ++ unsigned long struct_flags; /* Flags for internal use only */ ++ unsigned int refcount; /* Number of references to this struct */ ++ ++ unsigned short *display; /* The display buffer */ ++ ++ unsigned short *fb; /* The virtual screen framebuffer */ ++ unsigned int fb_size; /* Size of the framebuffer */ ++ unsigned int frame_base; /* Offset of row 0, column 0 of a frame in fb */ ++ unsigned int frame_size; /* Size of the frame */ ++ ++ unsigned int row; /* Current row in virtual screen */ ++ unsigned int col; /* Current column in virtual screen */ ++ unsigned int s_offset; /* Saved cursor position in virtual screen */ ++ ++ unsigned int top; /* Top scroll row in virtual screen */ ++ unsigned int bot; /* Bottom scroll row in virtual screen */ ++ ++ int esc_args; /* Number of arguments for a normal escape sequence */ ++ unsigned int csi_args[NPAR]; /* CSI parameters */ ++ unsigned int index; /* Index in csi_args and counter for cgram characters generation */ ++ unsigned char cgram_index; /* Index of the cgram character to be created */ ++ unsigned char *cgram_buffer; /* Buffer for cgram operations in this driver */ ++ ++ unsigned short erase_char; /* Character to be used when erasing */ ++ unsigned char attr; /* Current attributes */ ++ unsigned char color; /* Color for normal intensity mode */ ++ unsigned char s_color; /* Saved color for normal intensity mode */ ++ unsigned char defcolor; /* Default color for normal intensity mode */ ++ unsigned char ulcolor; /* Color for underline mode */ ++ unsigned char halfcolor; /* Color for low intensity mode */ ++ unsigned char attributes; /* Packed attributes */ ++ unsigned char s_attributes; /* Saved packed attributes */ ++ ++ unsigned char *s_charmap; /* Saved character map for this driver */ ++ unsigned char *flip_buf; /* High speed flip buffer */ ++}; ++ ++/** Function prototypes **/ ++ ++/* Init/Cleanup the driver */ ++static int init_driver(struct lcd_struct *); ++static int cleanup_driver(struct lcd_struct *); ++ ++/* Read from/Write to the driver */ ++static void read_data(struct lcd_struct *, unsigned short *); ++static void read_cgram(struct lcd_struct *, unsigned char, unsigned char *); ++static void write_data(struct lcd_struct *, unsigned short); ++static void write_cgram(struct lcd_struct *, unsigned char, unsigned char *); ++ ++/* Input handlers */ ++static void cr(struct lcd_struct *); ++static void lf(struct lcd_struct *); ++static void control_char(struct lcd_struct *, unsigned char); ++static void handle_csi(struct lcd_struct *, unsigned char); ++static int handle_custom_esc(struct lcd_struct *, unsigned int); ++static int handle_esc(struct lcd_struct *, unsigned char); ++static void handle_input(struct lcd_struct *, unsigned short); ++ ++/* Low level file operations */ ++static ssize_t do_lcd_read(struct lcd_struct *, void *, size_t); ++static ssize_t do_lcd_write(struct lcd_struct *, const void *, size_t); ++static int do_lcd_open(struct lcd_struct *); ++static int do_lcd_release(struct lcd_struct *); ++static int do_lcd_ioctl(struct lcd_struct *, unsigned int, unsigned long); ++ ++/* Proc functions */ ++#ifdef USE_PROC ++static void create_driver_proc_entries(struct lcd_struct *); ++static void remove_driver_proc_entries(struct lcd_struct *); ++#endif ++ ++/* globals */ ++static unsigned int major = LCD_MAJOR; /* Major number for LCD-Linux device */ ++static unsigned short minors = LCD_MINORS; /* Minor numbers allocated for LCD-Linux */ ++static LIST_HEAD(lcd_drivers); /* Registered lcd drivers */ ++static struct semaphore drivers_sem; /* Locks the lcd_drivers list */ ++#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 13) ++static struct class *lcd_linux_class; ++#endif ++#ifdef USE_PROC ++static struct proc_dir_entry *lcd_proc_root; ++#endif ++/* End of globals */ ++ ++#ifdef MODULE ++#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 0) ++#include <linux/device.h> ++MODULE_ALIAS_CHARDEV_MAJOR(LCD_MAJOR); ++#endif ++MODULE_DESCRIPTION("Software layer to drive LCD displays under Linux."); ++MODULE_AUTHOR("Mattia Jona-Lasinio <mjona@users.sourceforge.net>"); ++#ifdef MODULE_LICENSE ++MODULE_LICENSE("GPL"); ++#endif ++#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 0) ++module_param(minors, ushort, 0444); ++#else ++MODULE_PARM(minors, "h"); ++#endif ++MODULE_PARM_DESC(minors, "Minor numbers allocated for LCD-Linux (default: " string(LCD_MINORS) ")"); ++#else ++ ++/* ++ * Parse boot command line ++ * ++ * lcd=minors ++ */ ++static int __init lcd_linux_boot_init(char *cmdline) ++{ ++ unsigned short args; ++ ++ if ((args = simple_strtoul(cmdline, NULL, 0))) ++ minors = args; ++ ++ return (1); ++} ++ ++__setup("lcd=", lcd_linux_boot_init); ++#endif /* MODULE */ ++ ++/* Macros for iterator handling */ ++static inline unsigned int iterator_inc_(unsigned int iterator, const unsigned int module) ++{ ++ return ((++iterator)%module); ++} ++ ++static inline unsigned int iterator_dec_(unsigned int iterator, const unsigned int module) ++{ ++ return (iterator ? --iterator : module-1); ++} ++ ++#define iterator_inc(iterator, module) (iterator = iterator_inc_(iterator, module)) ++#define iterator_dec(iterator, module) (iterator = iterator_dec_(iterator, module)) ++ ++/* Uncomment the following two lines ++ * for non-atomic set_bit and clear_bit ++#define set_bit __set_bit ++#define clear_bit __clear_bit ++*/ ++ ++/************************************ ++ * Low level routines and utilities * ++ ************************************/ ++/* ++ * Set whether the address counter should be incremented ++ * or decremented after a Read/Write ++ */ ++static void address_mode(struct lcd_struct *p, int mode) ++{ ++ struct lcd_driver *driver = p->driver; ++ ++ if (mode > 0 && ! test_bit(INC_CURS_POS, &p->struct_flags)) { ++ if (driver->address_mode) ++ driver->address_mode(mode); ++ set_bit(INC_CURS_POS, &p->struct_flags); ++ } else if (mode < 0 && test_bit(INC_CURS_POS, &p->struct_flags)) { ++ if (driver->address_mode) ++ driver->address_mode(mode); ++ clear_bit(INC_CURS_POS, &p->struct_flags); ++ } ++} ++ ++/* WARNING!! This function returns an int because if iterator is not ++ * within the visible area of the frame it returns -1 ++ */ ++static inline int vs_to_frame_(struct lcd_struct *p, unsigned int iterator) ++{ ++ unsigned int vs_cols = p->par->vs_cols; ++ unsigned int row = iterator/vs_cols; ++ unsigned int col = iterator%vs_cols; ++ unsigned int frame_base_row = p->frame_base/vs_cols; ++ unsigned int frame_base_col = p->frame_base%vs_cols; ++ unsigned int frame_rows = p->par->cntr_rows*p->par->num_cntr; ++ unsigned int frame_cols = p->par->cntr_cols; ++ ++ if (row < frame_base_row || row >= frame_base_row+frame_rows) ++ return (-1); ++ if (col < frame_base_col || col >= frame_base_col+frame_cols) ++ return (-1); ++ ++ return ((row-frame_base_row)*frame_cols+(col-frame_base_col)); ++} ++ ++/* Given 'iterator' in vs, returns the offset in vs corresponding to the nearest ++ * visible offset in vs, or returns 'iterator' if it is already visible. ++ */ ++static unsigned int round_vs_(struct lcd_struct *p, unsigned int iterator) ++{ ++ unsigned int vs_cols = p->par->vs_cols; ++ unsigned int row = iterator/vs_cols; ++ unsigned int col = iterator%vs_cols; ++ unsigned int frame_base_row = p->frame_base/vs_cols; ++ unsigned int frame_base_col = p->frame_base%vs_cols; ++ unsigned int frame_rows = p->par->cntr_rows*p->par->num_cntr; ++ unsigned int frame_cols = p->par->cntr_cols; ++ ++ if (row < frame_base_row) ++ row = frame_base_row; ++ else if (row >= frame_base_row+frame_rows) ++ row = frame_base_row+(frame_rows-1); ++ ++ if (col < frame_base_col) ++ col = frame_base_col; ++ else if (col >= frame_base_col+frame_cols) ++ col = frame_base_col+(frame_cols-1); ++ ++ return ((row*vs_cols)+col); ++} ++ ++#define round_vs(p, iterator) (iterator = round_vs_(p, iterator)) ++ ++/* ++ * Sync the frame area starting at offset s, ending at offset e with fb content. ++ */ ++static void redraw_screen(struct lcd_struct *p, unsigned int s, unsigned int e) ++{ ++ unsigned int len; ++ unsigned int row = p->row, col = p->col; ++ unsigned int inc_set = test_bit(INC_CURS_POS, &p->struct_flags); ++ unsigned int frame_cols = p->par->cntr_cols; ++ unsigned int vs_cols = p->par->vs_cols; ++ unsigned long flags; ++ ++ if (s >= p->fb_size || e >= p->fb_size || e < s || e < p->frame_base) ++ return; ++ ++ round_vs(p, s); ++ round_vs(p, e); ++ ++ len = 1+e-s; ++ ++ if (! inc_set) ++ s = e; ++ ++ p->row = s/vs_cols; ++ p->col = s%vs_cols; ++ ++ flags = p->struct_flags; ++ clear_bit(NEED_WRAP, &p->struct_flags); ++ clear_bit(DECIM, &p->struct_flags); ++ set_bit(DECAWM, &p->struct_flags); ++ SET_INPUT_STATE(p, RAW); ++ if (inc_set) ++ while (len--) ++ if (vs_to_frame_(p, (p->row*vs_cols)+p->col) < 0) { ++ s += vs_cols-frame_cols; ++ len -= vs_cols-frame_cols-1; ++ p->row = s/vs_cols; ++ p->col = s%vs_cols; ++ } else { ++ write_data(p, p->fb[s++]); ++ if (test_bit(NEED_WRAP, &p->struct_flags)) { ++ cr(p); ++ lf(p); ++ } ++ } ++ else ++ while (len--) ++ if (vs_to_frame_(p, (p->row*vs_cols)+p->col) < 0) { ++ s -= vs_cols-frame_cols; ++ len -= vs_cols-frame_cols-1; ++ p->row = s/vs_cols; ++ p->col = s%vs_cols; ++ } else { ++ write_data(p, p->fb[s--]); ++ if (test_bit(NEED_WRAP, &p->struct_flags)) { ++ cr(p); ++ lf(p); ++ } ++ } ++ p->struct_flags = flags; ++ ++ p->row = row; p->col = col; ++} ++ ++static int make_cursor_visible(struct lcd_struct *p) ++{ ++ unsigned int vs_rows = p->par->vs_rows; ++ unsigned int vs_cols = p->par->vs_cols; ++ unsigned int frame_base, frame_base_row, frame_base_col; ++ unsigned int frame_rows = p->par->cntr_rows*p->par->num_cntr; ++ unsigned int frame_cols = p->par->cntr_cols; ++ unsigned int tmp = frame_cols/2; ++ ++ if (test_bit(INC_CURS_POS, &p->struct_flags)) { ++ /* cursor always on the lowest row of the display */ ++ frame_base_row = 0; ++ frame_base_col = 0; ++ if (p->row >= frame_rows) ++ frame_base_row = p->row-(frame_rows-1); ++ if (p->col >= frame_cols) { ++ frame_base_col = p->col-(frame_cols-1); ++ if (tmp) { ++ tmp = (tmp-(frame_base_col%tmp))%tmp; ++ if (frame_base_col+tmp <= vs_cols-frame_cols) ++ frame_base_col += tmp; ++ } ++ } ++ } else { ++ /* cursor always on the uppermost row of the display */ ++ frame_base_row = vs_rows-frame_rows; ++ frame_base_col = vs_cols-frame_cols; ++ if (p->row < vs_rows-frame_rows) ++ frame_base_row = p->row; ++ if (p->col < vs_cols-frame_cols) { ++ frame_base_col = p->col; ++ if (tmp) { ++ tmp = frame_base_col%tmp; ++ if (frame_base_col >= tmp) ++ frame_base_col -= tmp; ++ } ++ } ++ } ++ ++ frame_base = p->frame_base; ++ p->frame_base = (frame_base_row*vs_cols)+frame_base_col; ++ ++ return (frame_base != p->frame_base); ++} ++ ++/* ++ * Move the visible screen area at user's wish ++ */ ++static void browse_screen(struct lcd_struct *p, unsigned char dir) ++{ ++ unsigned int vs_rows = p->par->vs_rows; ++ unsigned int vs_cols = p->par->vs_cols; ++ unsigned int frame_base_row = p->frame_base/vs_cols; ++ unsigned int frame_base_col = p->frame_base%vs_cols; ++ unsigned int frame_rows = p->par->cntr_rows*p->par->num_cntr; ++ unsigned int frame_cols = p->par->cntr_cols; ++ ++ switch (dir) { ++ case '1': /* Up */ ++ if (! frame_base_row) ++ return; ++ --frame_base_row; ++ break; ++ case '2': /* Down */ ++ if (frame_base_row >= vs_rows-frame_rows) ++ return; ++ ++frame_base_row; ++ break; ++ case '3': /* Left */ ++ if (! frame_base_col) ++ return; ++ --frame_base_col; ++ break; ++ case '4': /* Right */ ++ if (frame_base_col >= vs_cols-frame_cols) ++ return; ++ ++frame_base_col; ++ break; ++ default: ++ return; ++ } ++ ++ p->frame_base = (frame_base_row*vs_cols)+frame_base_col; ++ redraw_screen(p, 0, p->fb_size-1); ++} ++ ++static inline void __memset_short(unsigned short *buf, unsigned short c, unsigned int len) ++{ ++ while (len--) ++ *buf++ = c; ++} ++ ++/* ++ * A memset implementation writing to LCD instead of memory locations. ++ */ ++static void lcd_memset(struct lcd_struct *p, unsigned int d, unsigned short c, unsigned int len) ++{ ++ unsigned int inc_set = test_bit(INC_CURS_POS, &p->struct_flags); ++ ++ if (! len || d >= p->fb_size) ++ return; ++ ++ if (inc_set && d+len > p->fb_size) ++ len = p->fb_size-d; ++ else if (! inc_set && len > d+1) ++ len = d+1; ++ ++ if (! inc_set) ++ d -= len-1; ++ __memset_short(p->fb+d, c, len); ++ ++ if (make_cursor_visible(p)) ++ redraw_screen(p, 0, p->fb_size-1); ++ else ++ redraw_screen(p, d, d+(len-1)); ++} ++ ++static inline void __memcpy_short(unsigned short *d, unsigned short *s, unsigned int len, int dir) ++{ ++ if (dir > 0) ++ while (len--) ++ *d++ = *s++; ++ else ++ while (len--) ++ *d-- = *s--; ++} ++ ++/* ++ * A memmove implementation writing to LCD instead of memory locations. ++ * Copy is done in a non destructive way. Display regions may overlap. ++ */ ++static void lcd_memmove(struct lcd_struct *p, unsigned int d, unsigned int s, unsigned int len) ++{ ++ if (! len || d == s || d >= p->fb_size || s >= p->fb_size) ++ return; ++ ++ if (d < s) { ++ if (test_bit(INC_CURS_POS, &p->struct_flags)) { ++ if (s+len > p->fb_size) ++ len = p->fb_size-s; ++ } else { ++ if (len > d+1) ++ len = d+1; ++ d -= len-1; ++ s -= len-1; ++ } ++ __memcpy_short(p->fb+d, p->fb+s, len, 1); ++ if (make_cursor_visible(p)) ++ redraw_screen(p, 0, p->fb_size-1); ++ else ++ redraw_screen(p, d, d+(len-1)); ++ } else { ++ if (test_bit(INC_CURS_POS, &p->struct_flags)) { ++ if (d+len > p->fb_size) ++ len = p->fb_size-d; ++ d += len-1; ++ s += len-1; ++ } else { ++ if (len > s+1) ++ len = s+1; ++ } ++ __memcpy_short(p->fb+d, p->fb+s, len, -1); ++ if (make_cursor_visible(p)) ++ redraw_screen(p, 0, p->fb_size-1); ++ else ++ redraw_screen(p, d-(len-1), d); ++ } ++} ++ ++static void scrup(struct lcd_struct *p, unsigned int t, unsigned int b, unsigned int nr) ++{ ++ unsigned int vs_rows = p->par->vs_rows; ++ unsigned int vs_cols = p->par->vs_cols; ++ unsigned int d, s; ++ ++ if (t+nr >= b) ++ nr = b-t-1; ++ if (b > vs_rows || t >= b || nr < 1) ++ return; ++ d = t*vs_cols; ++ s = (t+nr)*vs_cols; ++ if (test_bit(INC_CURS_POS, &p->struct_flags)) { ++ lcd_memmove(p, d, s, (b-t-nr)*vs_cols); ++ lcd_memset(p, d+(b-t-nr)*vs_cols, p->erase_char, nr*vs_cols); ++ } else { ++ lcd_memmove(p, d+(b-t-nr)*vs_cols-1, s+(b-t-nr)*vs_cols-1, (b-t-nr)*vs_cols); ++ lcd_memset(p, d+(b-t)*vs_cols-1, p->erase_char, nr*vs_cols); ++ } ++} ++ ++static void scrdown(struct lcd_struct *p, unsigned int t, unsigned int b, unsigned int nr) ++{ ++ unsigned int vs_rows = p->par->vs_rows; ++ unsigned int vs_cols = p->par->vs_cols; ++ unsigned int d, s; ++ ++ if (t+nr >= b) ++ nr = b-t-1; ++ if (b > vs_rows || t >= b || nr < 1) ++ return; ++ s = t*vs_cols; ++ d = (t+nr)*vs_cols; ++ if (test_bit(INC_CURS_POS, &p->struct_flags)) { ++ lcd_memmove(p, d, s, (b-t-nr)*vs_cols); ++ lcd_memset(p, s, p->erase_char, nr*vs_cols); ++ } else { ++ lcd_memmove(p, d+(b-t-nr)*vs_cols-1, s+(b-t-nr)*vs_cols-1, (b-t-nr)*vs_cols); ++ lcd_memset(p, s+nr*vs_cols-1, p->erase_char, nr*vs_cols); ++ } ++} ++ ++static void lcd_insert_char(struct lcd_struct *p, unsigned int nr) ++{ ++ unsigned int vs_cols = p->par->vs_cols; ++ unsigned int pos = (p->row*vs_cols)+p->col; ++ ++ clear_bit(NEED_WRAP, &p->struct_flags); ++ if (test_bit(INC_CURS_POS, &p->struct_flags)) ++ lcd_memmove(p, pos+nr, pos, vs_cols-p->col-nr); ++ else ++ lcd_memmove(p, pos-nr, pos, p->col-(nr-1)); ++ lcd_memset(p, pos, p->erase_char, nr); ++} ++ ++static void lcd_delete_char(struct lcd_struct *p, unsigned int nr) ++{ ++ unsigned int vs_cols = p->par->vs_cols; ++ unsigned int pos = (p->row*vs_cols)+p->col; ++ ++ clear_bit(NEED_WRAP, &p->struct_flags); ++ if (test_bit(INC_CURS_POS, &p->struct_flags)) { ++ lcd_memmove(p, pos, pos+nr, vs_cols-(p->col+nr)); ++ lcd_memset(p, (p->row+1)*vs_cols-nr, p->erase_char, nr); ++ } else { ++ lcd_memmove(p, pos, pos-nr, p->col-(nr-1)); ++ lcd_memset(p, (p->row*vs_cols)+(nr-1), p->erase_char, nr); ++ } ++} ++ ++ ++ ++ ++ ++/****************************************************************************** ++ ************************* VT 102 Emulation ************************* ++ ******************************************************************************/ ++ ++/********************** ++ * Control characters * ++ **********************/ ++static void bs(struct lcd_struct *p) ++{ ++ clear_bit(NEED_WRAP, &p->struct_flags); ++ if (test_bit(INC_CURS_POS, &p->struct_flags)) { ++ if (p->col) ++ --p->col; ++ } else { ++ if (p->col+1 < p->par->vs_cols) ++ ++p->col; ++ } ++} ++ ++static void cr(struct lcd_struct *p) ++{ ++ clear_bit(NEED_WRAP, &p->struct_flags); ++ p->col = (test_bit(INC_CURS_POS, &p->struct_flags) ? 0 : p->par->vs_cols-1); ++} ++ ++static void lf(struct lcd_struct *p) ++{ ++ clear_bit(NEED_WRAP, &p->struct_flags); ++ if (test_bit(INC_CURS_POS, &p->struct_flags)) { ++ if (p->row+1 == p->bot && INPUT_STATE(p) != RAW) { ++ make_cursor_visible(p); ++ scrup(p, p->top, p->bot, 1); ++ } else if (p->row+1 < p->par->vs_rows) ++ ++p->row; ++ } else { ++ if (p->row == p->top && INPUT_STATE(p) != RAW) { ++ make_cursor_visible(p); ++ scrdown(p, p->top, p->bot, 1); ++ } else if (p->row) ++ --p->row; ++ } ++} ++ ++static void ri(struct lcd_struct *p) ++{ ++ clear_bit(NEED_WRAP, &p->struct_flags); ++ if (test_bit(INC_CURS_POS, &p->struct_flags)) { ++ if (p->row == p->top) { ++ make_cursor_visible(p); ++ scrdown(p, p->top, p->bot, 1); ++ } else if (p->row) ++ --p->row; ++ } else { ++ if (p->row+1 == p->bot) { ++ make_cursor_visible(p); ++ scrup(p, p->top, p->bot, 1); ++ } else if (p->row+1 < p->par->vs_rows) ++ ++p->row; ++ } ++} ++ ++static void ff(struct lcd_struct *p) ++{ ++ unsigned int vs_rows = p->par->vs_rows; ++ unsigned int vs_cols = p->par->vs_cols; ++ ++ clear_bit(NEED_WRAP, &p->struct_flags); ++ if (p->driver->clear_display) { ++ p->driver->clear_display(); ++ __memset_short(p->fb, p->erase_char, p->fb_size); ++ __memset_short(p->display, p->erase_char, p->frame_size); ++ p->frame_base = 0; ++ } else if (test_bit(INC_CURS_POS, &p->struct_flags)) ++ lcd_memset(p, 0, p->erase_char, p->fb_size); ++ else ++ lcd_memset(p, p->fb_size-1, p->erase_char, p->fb_size); ++ ++ if (test_bit(INC_CURS_POS, &p->struct_flags)) ++ p->row = p->col = 0; ++ else { ++ p->row = vs_rows-1; ++ p->col = vs_cols-1; ++ } ++} ++ ++static void tab(struct lcd_struct *p) ++{ ++ struct lcd_parameters *par = p->par; ++ unsigned int i, vs_cols = par->vs_cols; ++ ++ clear_bit(NEED_WRAP, &p->struct_flags); ++ ++ if (! par->tabstop) ++ return; ++ ++ if (test_bit(INC_CURS_POS, &p->struct_flags)) { ++ i = par->tabstop-(p->col%par->tabstop); ++ if (p->col+i < vs_cols) ++ p->col += i; ++ } else { ++ i = p->col%par->tabstop; ++ i = (i == 0 ? par->tabstop : i); ++ if (p->col >= i) ++ p->col -= i; ++ } ++} ++ ++/* ++ * Control character handler. ++ */ ++static void control_char(struct lcd_struct *p, unsigned char val) ++{ ++ switch (val) { ++ case 0x08: /* BS: Back Space (^H) */ ++ case 0x7f: /* DEL: Delete */ ++ bs(p); ++ return; ++ ++ case 0x09: /* HT: Horizontal Tab (^I) */ ++ tab(p); ++ return; ++ ++ case 0x0c: /* FF: Form Feed (^L) */ ++ ff(p); ++ return; ++ ++ case 0x0a: /* LF: Line Feed (^J) */ ++ case 0x0b: /* VT: Vertical Tab (^K) */ ++ lf(p); ++ if (! test_bit(CRLF, &p->struct_flags)) ++ return; ++ ++ case 0x0d: /* CR: Carriage Return (^M) */ ++ cr(p); ++ return; ++ ++ case 0x16: /* SYN: Synchronous Idle (^V) */ ++ SET_INPUT_STATE(p, SYN); ++ return; ++ ++ case 0x1b: /* ESC: Start of escape sequence */ ++ SET_INPUT_STATE(p, ESC); ++ return; ++ ++ case 0x9b: /* CSI: Start of CSI escape sequence */ ++ memset(p->csi_args, 0, sizeof(p->csi_args)); ++ p->index = 0; ++ SET_INPUT_STATE(p, CSI); ++ return; ++ } ++} ++ ++static void gotoxy(struct lcd_struct *p, int new_col, int new_row) ++{ ++ unsigned int vs_rows = p->par->vs_rows; ++ unsigned int vs_cols = p->par->vs_cols; ++ ++ clear_bit(NEED_WRAP, &p->struct_flags); ++ if (new_row < 0) ++ p->row = 0; ++ else if (new_row >= vs_rows) ++ p->row = vs_rows-1; ++ else ++ p->row = new_row; ++ ++ if (new_col < 0) ++ p->col = 0; ++ else if (new_col >= vs_cols) ++ p->col = vs_cols-1; ++ else ++ p->col = new_col; ++ ++ if (make_cursor_visible(p)) ++ redraw_screen(p, 0, p->fb_size-1); ++} ++ ++ ++/****************************** ++ * ECMA-48 CSI ESC- sequences * ++ ******************************/ ++static void csi_at(struct lcd_struct *p, unsigned int nr) ++{ ++ unsigned int vs_cols = p->par->vs_cols; ++ ++ if (p->col+nr > vs_cols) ++ nr = vs_cols-p->col; ++ else if (! nr) ++ ++nr; ++ lcd_insert_char(p, nr); ++} ++ ++static void csi_J(struct lcd_struct *p, unsigned int action) ++{ ++ unsigned int vs_cols = p->par->vs_cols; ++ unsigned int pos = (p->row*vs_cols)+p->col; ++ ++ clear_bit(NEED_WRAP, &p->struct_flags); ++ switch (action) { ++ case 0: /* From cursor to end of display */ ++ lcd_memset(p, pos, p->erase_char, p->fb_size-pos); ++ return; ++ ++ case 1: /* From start of display to cursor */ ++ lcd_memset(p, 0, p->erase_char, pos+1); ++ return; ++ ++ case 2: /* Whole display */ ++ lcd_memset(p, 0, p->erase_char, p->fb_size); ++ return; ++ } ++} ++ ++static void csi_K(struct lcd_struct *p, unsigned int action) ++{ ++ unsigned int vs_cols = p->par->vs_cols; ++ unsigned int row_start = p->row*vs_cols; ++ ++ clear_bit(NEED_WRAP, &p->struct_flags); ++ switch (action) { ++ case 0: /* From cursor to end of line */ ++ lcd_memset(p, row_start+p->col, p->erase_char, vs_cols-p->col); ++ return; ++ ++ case 1: /* From start of line to cursor */ ++ lcd_memset(p, row_start, p->erase_char, p->col+1); ++ return; ++ ++ case 2: /* Whole line */ ++ lcd_memset(p, row_start, p->erase_char, vs_cols); ++ return; ++ } ++} ++ ++static void csi_L(struct lcd_struct *p, unsigned int nr) ++{ ++ unsigned int vs_rows = p->par->vs_rows; ++ unsigned int vs_cols = p->par->vs_cols; ++ ++ clear_bit(NEED_WRAP, &p->struct_flags); ++ if (p->row+nr > vs_rows) ++ nr = vs_rows-p->row; ++ else if (! nr) ++ ++nr;; ++ lcd_memmove(p, (p->row+nr)*vs_cols, p->row*vs_cols, (vs_rows-p->row-nr)*vs_cols); ++ lcd_memset(p, p->row*vs_cols, p->erase_char, nr*vs_cols); ++} ++ ++static void csi_M(struct lcd_struct *p, unsigned int nr) ++{ ++ unsigned int vs_rows = p->par->vs_rows; ++ unsigned int vs_cols = p->par->vs_cols; ++ ++ clear_bit(NEED_WRAP, &p->struct_flags); ++ if (p->row+nr > vs_rows) ++ nr = vs_rows-p->row; ++ else if (! nr) ++ ++nr;; ++ lcd_memmove(p, p->row*vs_cols, (p->row+nr)*vs_cols, (vs_rows-p->row-nr)*vs_cols); ++ lcd_memset(p, (vs_rows-nr)*vs_cols, p->erase_char, nr*vs_cols); ++} ++ ++static void csi_P(struct lcd_struct *p, unsigned int nr) ++{ ++ unsigned int vs_cols = p->par->vs_cols; ++ ++ if (p->col+nr > vs_cols) ++ nr = vs_cols-p->col; ++ else if (! nr) ++ ++nr; ++ lcd_delete_char(p, nr); ++} ++ ++static void csi_X(struct lcd_struct *p, unsigned int nr) ++{ ++ unsigned int vs_cols = p->par->vs_cols; ++ ++ clear_bit(NEED_WRAP, &p->struct_flags); ++ if (p->col+nr > vs_cols) ++ nr = vs_cols-p->col; ++ else if (! nr) ++ ++nr; ++ lcd_memset(p, (p->row*vs_cols)+p->col, p->erase_char, nr); ++} ++ ++static void csi_su(struct lcd_struct *p, unsigned char input) ++{ ++ unsigned int vs_cols = p->par->vs_cols; ++ ++ clear_bit(NEED_WRAP, &p->struct_flags); ++ if (input == 'u') { ++ p->row = p->s_offset/vs_cols; ++ p->col = p->s_offset%vs_cols; ++ p->color = p->s_color; ++ p->attributes = p->s_attributes; ++ return; ++ } ++ p->s_offset = (p->row*vs_cols)+p->col; ++ p->s_color = p->color; ++ p->s_attributes = p->attributes; ++} ++ ++static unsigned char build_attr(struct lcd_struct *p, unsigned char color, unsigned char intensity, ++ unsigned char blink, unsigned char underline, unsigned char reverse) ++{ ++ unsigned char attr; ++ ++ if (test_bit(CAN_DO_COLOR, &p->struct_flags)) { ++ attr = color; ++ if (underline) ++ attr = (attr & BG_MASK) | p->ulcolor; ++ else if (intensity == 0) ++ attr = (attr & BG_MASK) | p->halfcolor; ++ if (reverse) ++ attr = (attr & 0x88) | ((attr & 0x70) >> 4) | ((attr & 0x07) << 4); ++ if (blink) ++ attr ^= 0x80; ++ if (intensity == 2) ++ attr ^= 0x08; ++ } else { ++ attr = intensity; ++ attr |= (underline ? ULINE : 0x00); ++ attr |= (reverse ? REVERSE : 0x00); ++ attr |= (blink ? BLINK : 0x00); ++ } ++ ++ return (attr); ++} ++ ++static void update_attr(struct lcd_struct *p) ++{ ++ unsigned char intensity = p->attributes & 0x03; ++ unsigned char underline = (p->attributes >> 2) & 0x01; ++ unsigned char reverse = (p->attributes >> 3) & 0x01; ++ unsigned char blink = (p->attributes >> 7) & 0x01; ++ unsigned char decscnm = (p->struct_flags >> DECSCNM) & 0x01; ++ ++ p->attr = build_attr(p, p->color, intensity, blink, underline, reverse^decscnm); ++ p->erase_char = (build_attr(p, p->color, 1, blink, 0, decscnm) << 8) | ' '; ++} ++ ++static void default_attr(struct lcd_struct *p) ++{ ++ p->attributes = 0x01; ++ p->color = p->defcolor; ++} ++ ++static void lcd_invert_screen(struct lcd_struct *p, unsigned int offset, unsigned int len) ++{ ++ if (test_bit(CAN_DO_COLOR, &p->struct_flags)) ++ while (len--) { ++ p->fb[offset] = (p->fb[offset] & 0x88ff) | ((p->fb[offset] & 0x7000) >> 4) | ((p->fb[offset] & 0x0700) << 4); ++ ++offset; ++ } ++ else ++ while (len--) { ++ p->fb[offset] ^= 0x0800; ++ ++offset; ++ } ++} ++ ++static void csi_m(struct lcd_struct *p, unsigned int n) ++{ ++ int i, arg; ++ ++ for (i = 0; i <= n; ++i) ++ switch ((arg = p->csi_args[i])) ++ { ++ case 0: ++ default_attr(p); ++ break; ++ ++ case 1: ++ p->attributes = (p->attributes & ~I_MASK) | 2; ++ break; ++ ++ case 2: ++ p->attributes = (p->attributes & ~I_MASK) | 0; ++ break; ++ ++ case 4: ++ p->attributes |= ULINE; ++ break; ++ ++ case 5: ++ p->attributes |= BLINK; ++ break; ++ ++ case 7: ++ p->attributes |= REVERSE; ++ break; ++ ++ case 21: case 22: ++ p->attributes = (p->attributes & ~I_MASK) | 1; ++ break; ++ ++ case 24: ++ p->attributes &= ~ULINE; ++ break; ++ ++ case 25: ++ p->attributes &= ~BLINK; ++ break; ++ ++ case 27: ++ p->attributes &= ~REVERSE; ++ break; ++ ++ case 38: ++ p->attributes |= ULINE; ++ p->color = (p->color & BG_MASK) | (p->defcolor & FG_MASK); ++ break; ++ ++ case 39: ++ p->attributes &= ~ULINE; ++ p->color = (p->color & BG_MASK) | (p->defcolor & FG_MASK); ++ break; ++ ++ case 49: ++ p->color = (p->defcolor & BG_MASK) | (p->color & FG_MASK); ++ break; ++ ++ default: ++ if (arg >= 30 && arg <= 37) ++ p->color = (p->color & BG_MASK) | color_table[arg-30]; ++ else if (arg >= 40 && arg <= 47) ++ p->color = (p->color & FG_MASK) | (color_table[arg-40] << 4); ++ break; ++ } ++ ++ update_attr(p); ++} ++ ++static void csi_h(struct lcd_struct *p, unsigned char n) ++{ ++ switch (n) { ++ case 4: /* Set insert mode */ ++ set_bit(DECIM, &p->struct_flags); ++ return; ++ ++ case 5: /* Inverted screen mode */ ++ if (test_bit(QUES, &p->struct_flags) && ! test_bit(DECSCNM, &p->struct_flags)) { ++ set_bit(DECSCNM, &p->struct_flags); ++ lcd_invert_screen(p, 0, p->fb_size); ++ update_attr(p); ++ redraw_screen(p, 0, p->fb_size-1); ++ } ++ return; ++ ++ case 7: /* Set autowrap */ ++ if (test_bit(QUES, &p->struct_flags)) ++ set_bit(DECAWM, &p->struct_flags); ++ return; ++ ++ case 20: /* Set cr lf */ ++ set_bit(CRLF, &p->struct_flags); ++ return; ++ } ++} ++ ++static void csi_l(struct lcd_struct *p, unsigned char n) ++{ ++ switch (n) { ++ case 4: /* Reset insert mode */ ++ clear_bit(DECIM, &p->struct_flags); ++ return; ++ ++ case 5: /* Normal screen mode */ ++ if (test_bit(QUES, &p->struct_flags) && test_bit(DECSCNM, &p->struct_flags)) { ++ clear_bit(DECSCNM, &p->struct_flags); ++ lcd_invert_screen(p, 0, p->fb_size); ++ update_attr(p); ++ redraw_screen(p, 0, p->fb_size-1); ++ } ++ return; ++ ++ case 7: /* Reset autowrap */ ++ if (test_bit(QUES, &p->struct_flags)) ++ clear_bit(DECAWM, &p->struct_flags); ++ return; ++ ++ case 20: /* Reset cr lf */ ++ clear_bit(CRLF, &p->struct_flags); ++ return; ++ } ++} ++ ++static void csi_linux(struct lcd_struct *p) ++{ ++ switch (p->csi_args[0]) { ++ case 1: ++ if (test_bit(CAN_DO_COLOR, &p->struct_flags) && p->csi_args[1] < 16) { ++ p->ulcolor = color_table[p->csi_args[1]]; ++ if (p->attributes & ULINE) ++ update_attr(p); ++ } ++ return; ++ ++ case 2: ++ if (test_bit(CAN_DO_COLOR, &p->struct_flags) && p->csi_args[1] < 16) { ++ p->halfcolor = color_table[p->csi_args[1]]; ++ if ((p->attributes & I_MASK) == 0) ++ update_attr(p); ++ } ++ return; ++ ++ case 8: ++ p->defcolor = p->color; ++ default_attr(p); ++ update_attr(p); ++ return; ++ } ++} ++ ++static void csi_r(struct lcd_struct *p, unsigned int top, unsigned int bot) ++{ ++ /* Minimum allowed region is 2 lines */ ++ if (top < bot) { ++ p->top = top-1; ++ p->bot = bot; ++ gotoxy(p, 0, 0); ++ } ++} ++ ++/* ++ * ECMA-48 CSI ESC- sequence handler. ++ */ ++static void handle_csi(struct lcd_struct *p, unsigned char input) ++{ ++ if (p->index >= NPAR) { ++ SET_INPUT_STATE(p, NORMAL); ++ printk(KERN_NOTICE "LCD: too many parameters in CSI escape sequence\n"); ++ } else if (input == '?') { ++ set_bit(QUES, &p->struct_flags); ++ } else if (input == ';') { ++ ++p->index; ++ } else if (input >= '0' && input <= '9') { ++ p->csi_args[p->index] = (p->csi_args[p->index]*10)+(input-'0'); ++ } else { ++ SET_INPUT_STATE(p, NORMAL); ++ if (! test_bit(INC_CURS_POS, &p->struct_flags)) ++ return; ++ switch (input) { ++ case 'h': /* DECSET sequences and mode switches */ ++ csi_h(p, p->csi_args[0]); ++ clear_bit(QUES, &p->struct_flags); ++ return; ++ ++ case 'l': /* DECRST sequences and mode switches */ ++ csi_l(p, p->csi_args[0]); ++ clear_bit(QUES, &p->struct_flags); ++ return; ++ } ++ clear_bit(QUES, &p->struct_flags); ++ switch (input) { ++ case '@': /* Insert # Blank character */ ++ csi_at(p, p->csi_args[0]); ++ return; ++ ++ case 'G': case '`': /* Cursor to indicated column in current row */ ++ if (p->csi_args[0]) ++ --p->csi_args[0]; ++ gotoxy(p, p->csi_args[0], p->row); ++ return; ++ ++ case 'A': /* Cursor # rows Up */ ++ if (! p->csi_args[0]) ++ ++p->csi_args[0]; ++ gotoxy(p, p->col, p->row-p->csi_args[0]); ++ return; ++ ++ case 'B': case 'e': /* Cursor # rows Down */ ++ if (! p->csi_args[0]) ++ ++p->csi_args[0]; ++ gotoxy(p, p->col, p->row+p->csi_args[0]); ++ return; ++ ++ case 'C': case 'a': /* Cursor # columns Right */ ++ if (! p->csi_args[0]) ++ ++p->csi_args[0]; ++ gotoxy(p, p->col+p->csi_args[0], p->row); ++ return; ++ ++ case 'D': /* Cursor # columns Left */ ++ if (! p->csi_args[0]) ++ ++p->csi_args[0]; ++ gotoxy(p, p->col-p->csi_args[0], p->row); ++ return; ++ ++ case 'E': /* Cursor # rows Down, column 1 */ ++ if (! p->csi_args[0]) ++ ++p->csi_args[0]; ++ gotoxy(p, 0, p->row+p->csi_args[0]); ++ return; ++ ++ case 'F': /* Cursor # rows Up, column 1 */ ++ if (! p->csi_args[0]) ++ ++p->csi_args[0]; ++ gotoxy(p, 0, p->row-p->csi_args[0]); ++ return; ++ ++ case 'd': /* Cursor to indicated row in current column */ ++ if (p->csi_args[0]) ++ --p->csi_args[0]; ++ gotoxy(p, p->col, p->csi_args[0]); ++ return; ++ ++ case 'H': case 'f': /* Cursor to indicated row, column (origin 1, 1) */ ++ if (p->csi_args[0]) ++ --p->csi_args[0]; ++ if (p->csi_args[1]) ++ --p->csi_args[1]; ++ gotoxy(p, p->csi_args[1], p->csi_args[0]); ++ return; ++ ++ case 'J': /* Erase display */ ++ csi_J(p, p->csi_args[0]); ++ return; ++ ++ case 'K': /* Erase line */ ++ csi_K(p, p->csi_args[0]); ++ return; ++ ++ case 'L': /* Insert # blank lines */ ++ csi_L(p, p->csi_args[0]); ++ return; ++ ++ case 'M': /* Delete # blank lines */ ++ csi_M(p, p->csi_args[0]); ++ return; ++ ++ case 'P': /* Delete # characters on the current line */ ++ csi_P(p, p->csi_args[0]); ++ return; ++ ++ case 'X': /* Erase # characters on the current line */ ++ csi_X(p, p->csi_args[0]); ++ return; ++ ++ case 'm': /* Set video attributes */ ++ csi_m(p, p->index); ++ return; ++ ++ case 's': /* Save cursor position */ ++ case 'u': /* Restore cursor position */ ++ csi_su(p, input); ++ return; ++ ++ case ']': /* Linux private ESC [ ] sequence */ ++ csi_linux(p); ++ return; ++ ++ case 'r': /* Set the scrolling region */ ++ if (! p->csi_args[0]) ++ ++p->csi_args[0]; ++ if (! p->csi_args[1] || p->csi_args[1] > p->par->vs_rows) ++ p->csi_args[1] = p->par->vs_rows; ++ csi_r(p, p->csi_args[0], p->csi_args[1]); ++ return; ++ ++ /* Ignored escape sequences */ ++ case 'c': ++ case 'g': ++ case 'n': ++ case 'q': ++ return; ++ ++ default: ++ printk(KERN_NOTICE "LCD: unrecognized CSI escape sequence: ESC [ %u\n", input); ++ return; ++ } ++ } ++} ++ ++/* ++ * Custom ESC- sequence handler. ++ */ ++static int handle_custom_esc(struct lcd_struct *p, unsigned int _input) ++{ ++ unsigned char input = _input & 0xff; ++ struct lcd_parameters *par = p->par; ++ ++ if (_input & (~0xff)) { ++ switch (ESC_STATE(p)) { ++ case 's': ++ if (p->index++) { ++ unsigned char *buf = p->cgram_buffer+(p->cgram_index-par->cgram_char0)*par->cgram_bytes; ++ ++ buf[p->index-2] = input; ++ if (p->index == par->cgram_bytes+1) ++ write_cgram(p, p->cgram_index, buf); ++ } else { ++ if (! p->driver->write_cgram_char) { ++ printk(KERN_ERR "LCD: %s: missing function to write to CGRAM\n", p->par->name); ++ return (-1); ++ } ++ if (input >= par->cgram_char0 && input < par->cgram_char0+par->cgram_chars) ++ p->cgram_index = input; ++ else { ++ printk(KERN_NOTICE "LCD: bad CGRAM index\n"); ++ return (-1); ++ } ++ } ++ return (0); ++ ++ case 'G': ++ if (input >= par->cgram_char0 && input < par->cgram_char0+par->cgram_chars) ++ write_data(p, (p->attr << 8) | p->driver->charmap[input]); ++ else { ++ SET_INPUT_STATE(p, NORMAL); ++ handle_input(p, (p->attr << 8) | input); ++ } ++ return (0); ++ ++ case 'r': ++ if (input == '1') ++ address_mode(p, -1); ++ else if (input == '0') ++ address_mode(p, 1); ++ return (0); ++ ++ case 'A': ++ scrup(p, p->top, p->bot, input); ++ return (0); ++ ++ case 'B': ++ scrdown(p, p->top, p->bot, input); ++ return (0); ++ ++ case 'C': ++ browse_screen(p, input); ++ return (0); ++ } ++ } ++ ++ /* These are the custom ESC- sequences */ ++ switch (input) { ++ case 's': /* CGRAM select */ ++ if (p->cgram_buffer) { ++ SET_ESC_STATE(p, input); ++ p->index = 0; ++ return (par->cgram_bytes+1); ++ } else { ++ printk(KERN_NOTICE "LCD: driver %s does not support CGRAM chars\n", par->name); ++ return (0); ++ } ++ ++ case 'A': /* Scroll up */ ++ case 'B': /* Scroll down */ ++ case 'C': /* Browse screen */ ++ case 'G': /* Enter cgram mode */ ++ case 'r': /* Decrement counter after data read/write */ ++ SET_ESC_STATE(p, input); ++ return (1); ++ } ++ ++ return (-1); ++} ++ ++/* ++ * ESC- but not CSI sequence handler. ++ */ ++static int handle_esc(struct lcd_struct *p, unsigned char input) ++{ ++ int ret; ++ ++ SET_INPUT_STATE(p, NORMAL); ++ switch (input) { ++ case 'c': /* Reset */ ++ set_bit(DECAWM, &p->struct_flags); ++ set_bit(INC_CURS_POS, &p->struct_flags); ++ ff(p); ++ return (0); ++ ++ case 'D': /* Line Feed */ ++ lf(p); ++ return (0); ++ ++ case 'E': /* New Line */ ++ cr(p); ++ lf(p); ++ return (0); ++ ++ case 'M': /* Reverse Line Feed */ ++ ri(p); ++ return (0); ++ ++ case '7': ++ case '8': ++ csi_su(p, (input == '7' ? 's' : 'u')); ++ return (0); ++ ++ /* CSI: Start of CSI escape sequence */ ++ case '[': ++ memset(p->csi_args, 0, sizeof(p->csi_args)); ++ p->index = 0; ++ SET_INPUT_STATE(p, CSI); ++ return (0); ++ ++ /* Ignored escape sequences */ ++ case '(': ++ SET_INPUT_STATE(p, ESC_G0); ++ return (1); ++ ++ case ')': ++ SET_INPUT_STATE(p, ESC_G1); ++ return (1); ++ ++ case '#': ++ SET_INPUT_STATE(p, ESC_HASH); ++ return (1); ++ ++ case '%': ++ SET_INPUT_STATE(p, ESC_PERCENT); ++ return (1); ++ ++ case 'H': ++ case 'Z': ++ case '>': ++ case '=': ++ case ']': ++ return (0); ++ } ++ ++ /* These are the custom ESC- sequences */ ++ if ((ret = handle_custom_esc(p, input)) > 0) { ++ SET_INPUT_STATE(p, ARG); ++ return (ret); ++ } ++ ++ if (ret < 0 && p->driver->handle_custom_char) ++ if ((ret = p->driver->handle_custom_char(input)) > 0) { ++ SET_INPUT_STATE(p, ARG_DRIVER); ++ return (ret); ++ } ++ ++ if (ret < 0) ++ printk(KERN_NOTICE "LCD: unrecognized escape sequence: ESC %u\n", input); ++ ++ return (0); ++} ++ ++/* ++ * Main input handler. ++ */ ++static void handle_input(struct lcd_struct *p, unsigned short _input) ++{ ++ unsigned char input = _input & 0xff; ++ struct lcd_driver *driver = p->driver; ++ ++ switch (INPUT_STATE(p)) { ++ case NORMAL: ++ if (input < 0x20 || input == 0x9b) ++ control_char(p, input); ++ else ++ write_data(p, (_input & 0xff00) | driver->charmap[input]); ++ return; ++ ++ case RAW: ++ write_data(p, (_input & 0xff00) | driver->charmap[input]); ++ return; ++ ++ case SYN: ++ write_data(p, _input); ++ SET_INPUT_STATE(p, NORMAL); ++ return; ++ ++ case ESC: ++ p->esc_args = handle_esc(p, input); ++ return; ++ ++ case ESC_G0: ++ case ESC_G1: ++ case ESC_HASH: ++ case ESC_PERCENT: ++ if (! --p->esc_args) ++ SET_INPUT_STATE(p, NORMAL); ++ return; ++ ++ case CSI: ++ handle_csi(p, input); ++ return; ++ ++ case ARG: ++ if (handle_custom_esc(p, 0x100 | input) || ! --p->esc_args) ++ SET_INPUT_STATE(p, NORMAL); ++ return; ++ ++ case ARG_DRIVER: ++ if (driver->handle_custom_char(0x100 | input) || ! --p->esc_args) ++ SET_INPUT_STATE(p, NORMAL); ++ return; ++ } ++} ++ ++ ++ ++ ++ ++/*************************************** ++ * Read from/Write to display routines * ++ ***************************************/ ++ ++/* ++ * Write character data to the display. ++ */ ++static void write_data(struct lcd_struct *p, unsigned short data) ++{ ++ unsigned int vs_cols = p->par->vs_cols; ++ unsigned int pos; ++ int frame_pos; ++ ++ if (test_bit(NEED_WRAP, &p->struct_flags)) { ++ cr(p); ++ lf(p); ++ } ++ ++ if (test_bit(DECIM, &p->struct_flags)) ++ lcd_insert_char(p, 1); ++ ++ pos = (p->row*vs_cols)+p->col; ++ if ((frame_pos = vs_to_frame_(p, pos)) < 0) { ++ make_cursor_visible(p); ++ redraw_screen(p, 0, p->fb_size-1); ++ frame_pos = vs_to_frame_(p, pos); ++ } ++ ++ if (p->display[frame_pos] != data) { ++ p->driver->write_char(frame_pos, data); ++ p->display[frame_pos] = data; ++ } ++ ++ p->fb[pos] = data; ++ ++ if (test_bit(INC_CURS_POS, &p->struct_flags)) { ++ if (p->col+1 < vs_cols) ++ iterator_inc(p->col, vs_cols); ++ else if (test_bit(DECAWM, &p->struct_flags)) ++ set_bit(NEED_WRAP, &p->struct_flags); ++ } else { ++ if (p->col) ++ iterator_dec(p->col, vs_cols); ++ else if (test_bit(DECAWM, &p->struct_flags)) ++ set_bit(NEED_WRAP, &p->struct_flags); ++ } ++} ++ ++/* ++ * Write an entire CGRAM character to the display. ++ */ ++static void write_cgram(struct lcd_struct *p, unsigned char index, unsigned char *pixels) ++{ ++ unsigned int inc_set = test_bit(INC_CURS_POS, &p->struct_flags); ++ ++ if (! inc_set) ++ address_mode(p, 1); ++ ++ p->driver->write_cgram_char(index, pixels); ++ ++ if (! inc_set) ++ address_mode(p, -1); ++} ++ ++/* ++ * Read character data from the display. ++ */ ++static void read_data(struct lcd_struct *p, unsigned short *data) ++{ ++ unsigned int vs_rows = p->par->vs_rows; ++ unsigned int vs_cols = p->par->vs_cols; ++ unsigned int pos = (p->row*vs_cols)+p->col; ++ int frame_pos; ++ ++ if ((frame_pos = vs_to_frame_(p, pos)) < 0) { ++ make_cursor_visible(p); ++ redraw_screen(p, 0, p->fb_size-1); ++ frame_pos = vs_to_frame_(p, pos); ++ } ++ ++ p->driver->read_char(frame_pos, data); ++ ++ if (test_bit(INC_CURS_POS, &p->struct_flags)) { ++ iterator_inc(p->col, vs_cols); ++ if (! p->col) { ++ if (p->row+1 < vs_rows) ++ ++p->row; ++ } ++ } else { ++ iterator_dec(p->col, vs_cols); ++ if (p->col+1 == vs_cols) { ++ if (p->row) ++ --p->row; ++ } ++ } ++} ++ ++/* ++ * Read an entire CGRAM character from the display. ++ */ ++static void read_cgram(struct lcd_struct *p, unsigned char index, unsigned char *pixels) ++{ ++ unsigned int inc_set = test_bit(INC_CURS_POS, &p->struct_flags); ++ ++ if (! inc_set) ++ address_mode(p, 1); ++ ++ p->driver->read_cgram_char(index, pixels); ++ ++ if (! inc_set) ++ address_mode(p, -1); ++} ++ ++ ++ ++ ++ ++/**************************** ++ * Proc filesystem routines * ++ ****************************/ ++#ifdef USE_PROC ++#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 4, 0) ++/* create_proc_read_entry is missing in 2.2.x kernels */ ++static struct proc_dir_entry *create_proc_read_entry(const char *name, mode_t mode, ++ struct proc_dir_entry *parent, read_proc_t *read_proc, void *data) ++{ ++ struct proc_dir_entry *res = create_proc_entry(name, mode, parent); ++ ++ if (res) { ++ res->read_proc = read_proc; ++ res->data = data; ++ } ++ ++ return (res); ++} ++#endif ++ ++static int proc_fb_read(char *buffer, char **start, off_t offset, int size, int *eof, void *data) ++{ ++ char *temp = buffer; ++ struct lcd_struct *p = (struct lcd_struct *)data; ++ unsigned int vs_cols; ++ static unsigned int nr, need_wrap; ++ static off_t _offset; ++ ++ down(&p->lcd_sem); ++ if (! offset) ++ _offset = 0; ++ if ((*eof = (_offset >= p->fb_size))) { ++ up(&p->lcd_sem); ++ return (0); ++ } ++ vs_cols = p->par->vs_cols; ++ if (size && need_wrap) { ++ need_wrap = 0; ++ temp += sprintf(temp, "\n"); ++ --size; ++ } ++ if (! nr) ++ nr = vs_cols; ++ *start = (char *)0; ++ while (size && nr) { ++ unsigned char c = (p->fb[_offset] & 0xff); ++ ++ temp += sprintf(temp, "%c", (c < 0x20 ? '·' : c)); ++ --size; ++ --nr; ++ ++*start; ++ ++_offset; ++ } ++ if (! nr) { ++ if (size) { ++ temp += sprintf(temp, "\n"); ++ --size; ++ } else ++ need_wrap = 1; ++ } ++ up(&p->lcd_sem); ++ ++ return (temp-buffer); ++} ++ ++static int proc_display_read(char *buffer, char **start, off_t offset, int size, int *eof, void *data) ++{ ++ char *temp = buffer; ++ struct lcd_struct *p = (struct lcd_struct *)data; ++ unsigned int i, frame_cols; ++ int frame_pos; ++ ++ down(&p->lcd_sem); ++ frame_cols = p->par->cntr_cols; ++ frame_pos = vs_to_frame_(p, (p->row*p->par->vs_cols)+p->col); ++ temp += sprintf(temp, " "); ++ for (i = 2; i <= frame_cols; i += 2) ++ temp += sprintf(temp, " %d", i%10); ++ temp += sprintf(temp, "\n"); ++ ++ temp += sprintf(temp, " +"); ++ for (i = 0; i < frame_cols; ++i) ++ temp += sprintf(temp, "-"); ++ temp += sprintf(temp, "+\n"); ++ ++ for (i = 0; i < p->frame_size; ++i) { ++ unsigned char c = (p->display[i] & 0xff); ++ ++ if (! (i%frame_cols)) ++ temp += sprintf(temp, "%2d |", 1+i/frame_cols); ++ if (frame_pos--) ++ temp += sprintf(temp, "%c", (c < 0x20 ? '·' : c)); ++ else ++ temp += sprintf(temp, "_"); ++ if (! ((i+1)%frame_cols)) ++ temp += sprintf(temp, "|\n"); ++ } ++ ++ temp += sprintf(temp, " +"); ++ for (i = 0; i < frame_cols; ++i) ++ temp += sprintf(temp, "-"); ++ temp += sprintf(temp, "+\n"); ++ up(&p->lcd_sem); ++ ++ return (temp-buffer); ++} ++ ++static int proc_charmap_read(char *buffer, char **start, off_t offset, int size, int *eof, void *data) ++{ ++ char *temp = buffer; ++ struct lcd_struct *p = (struct lcd_struct *)data; ++ unsigned char *charmap; ++ unsigned int i; ++ ++ down(&p->lcd_sem); ++ charmap = p->driver->charmap; ++ temp += sprintf(temp, "static unsigned char charmap[] = {"); ++ for (i = 0; i < 255; ++i) { ++ if (! (i & 7)) { ++ temp += sprintf(temp, "\n"); ++ if (! (i & 31)) ++ temp += sprintf(temp, "\n/* %d - %d */\n", i, i+31); ++ } ++ temp += sprintf(temp, "0x%.2x, ", *charmap++); ++ } ++ temp += sprintf(temp, "0x%.2x\n\n};\n", *charmap); ++ up(&p->lcd_sem); ++ ++ return (temp-buffer); ++} ++ ++static int proc_registered_drivers(char *buffer, char **start, off_t offset, int size, int *eof, void *data) ++{ ++ char *temp = buffer; ++ struct list_head *entry; ++ ++ down(&drivers_sem); ++ temp += sprintf(temp, "Registered drivers:\n"); ++ list_for_each(entry, &lcd_drivers) { ++ struct lcd_struct *p = list_entry(entry, struct lcd_struct, lcd_list); ++ ++ down(&p->lcd_sem); ++ temp += sprintf(temp, "%3d %s\n", p->par->minor, p->par->name); ++ up(&p->lcd_sem); ++ } ++ up(&drivers_sem); ++ ++ return (temp-buffer); ++} ++ ++static void create_driver_proc_entries(struct lcd_struct *p) ++{ ++ struct proc_dir_entry *driver_proc_root = p->driver->driver_proc_root; ++ int proc_level = 0; ++ ++ SET_PROC_LEVEL(p, proc_level); ++ if (create_proc_read_entry("framebuffer", 0, driver_proc_root, proc_fb_read, p) == NULL) { ++ printk(KERN_ERR "LCD: cannot create /proc/lcd/%s/framebuffer\n", p->par->name); ++ return; ++ } ++ SET_PROC_LEVEL(p, ++proc_level); ++ if (create_proc_read_entry("display", 0, driver_proc_root, proc_display_read, p) == NULL) { ++ printk(KERN_ERR "LCD: cannot create /proc/lcd/%s/display\n", p->par->name); ++ return; ++ } ++ SET_PROC_LEVEL(p, ++proc_level); ++ if (create_proc_read_entry("charmap.h", 0, driver_proc_root, proc_charmap_read, p) == NULL) { ++ printk(KERN_ERR "LCD: cannot create /proc/lcd/%s/charmap.h\n", p->par->name); ++ return; ++ } ++ SET_PROC_LEVEL(p, ++proc_level); ++} ++ ++static void remove_driver_proc_entries(struct lcd_struct *p) ++{ ++ struct proc_dir_entry *driver_proc_root = p->driver->driver_proc_root; ++ ++ switch (PROC_LEVEL(p)) { ++ case 3: ++ remove_proc_entry("charmap.h", driver_proc_root); ++ case 2: ++ remove_proc_entry("display", driver_proc_root); ++ case 1: ++ remove_proc_entry("framebuffer", driver_proc_root); ++ } ++ SET_PROC_LEVEL(p, 0); ++} ++#endif ++ ++ ++ ++ ++ ++/***************************** ++ * Low level file operations * ++ *****************************/ ++static ssize_t do_lcd_read(struct lcd_struct *p, void *buffer, size_t length) ++{ ++ unsigned int i; ++ unsigned short tmp; ++ ++ if (! p->refcount) ++ return (-ENXIO); ++ ++ if (! p->driver->read_char) { ++ printk(KERN_NOTICE "LCD: driver %s doesn't support reading\n", p->par->name); ++ return (-ENOSYS); ++ } ++ ++ if (test_bit(WITH_ATTR, &p->struct_flags)) ++ for (i = 0; i < length; ++i) { ++ read_data(p, &tmp); ++ ((unsigned short *)buffer)[i] = tmp; ++ } ++ else ++ for (i = 0; i < length; ++i) { ++ read_data(p, &tmp); ++ ((unsigned char *)buffer)[i] = tmp & 0xff; ++ } ++ ++ return (length); ++} ++ ++static ssize_t do_lcd_write(struct lcd_struct *p, const void *buffer, size_t length) ++{ ++ unsigned int i; ++ ++ if (! p->refcount) ++ return (-ENXIO); ++ ++ if (test_bit(WITH_ATTR, &p->struct_flags)) ++ for (i = 0; i < length; ++i) ++ handle_input(p, ((const unsigned short *)buffer)[i]); ++ else ++ for (i = 0; i < length; ++i) ++ handle_input(p, (p->attr << 8) | ((const unsigned char *)buffer)[i]); ++ ++ return (length); ++} ++ ++static int do_lcd_open(struct lcd_struct *p) ++{ ++ if (! p->refcount) { ++ if (p->driver->driver_module) { ++#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 0) ++ if (! try_module_get(p->driver->driver_module)) ++ return (-EBUSY); ++#else ++ if (__MOD_IN_USE(p->driver->driver_module)) ++ return (-EBUSY); ++ ++ __MOD_INC_USE_COUNT(p->driver->driver_module); ++#endif ++ } ++ } ++ ++ ++p->refcount; ++ ++ return (0); ++} ++ ++static int do_lcd_release(struct lcd_struct *p) ++{ ++ if (! p->refcount) ++ return (0); ++ ++ if (p->refcount == 1) { ++ if (p->driver->driver_module) ++#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 0) ++ module_put(p->driver->driver_module); ++#else ++ __MOD_DEC_USE_COUNT(p->driver->driver_module); ++#endif ++ } ++ ++ --p->refcount; ++ ++ return (0); ++} ++ ++static int cgram_ioctl(struct lcd_struct *p, unsigned int cmd, unsigned char *argp) ++{ ++ struct lcd_parameters *par = p->par; ++ unsigned int length = par->cgram_bytes; ++ unsigned char index = argp[0]; ++ unsigned char *buffer = argp+1; ++ unsigned char *cgram_buffer = p->cgram_buffer+(index-par->cgram_char0)*length; ++ ++ if (index < par->cgram_char0 || index >= par->cgram_char0+par->cgram_chars) ++ return (-EINVAL); ++ ++ if (cmd == LCDL_SET_CGRAM_CHAR) { ++ if (! p->driver->write_cgram_char) { ++ printk(KERN_ERR "LCD: %s: missing function to write to CGRAM\n", p->par->name); ++ return (-ENOSYS); ++ } ++ if (test_bit(USER_SPACE, &p->struct_flags)) { ++ if (copy_from_user(cgram_buffer, buffer, length)) ++ return (-EFAULT); ++ } else ++ memcpy(cgram_buffer, buffer, length); ++ write_cgram(p, index, cgram_buffer); ++ } else { ++ if (! p->driver->read_cgram_char) { ++ printk(KERN_ERR "LCD: %s: missing function to read from CGRAM or unable to read\n", p->par->name); ++ return (-ENOSYS); ++ } ++ read_cgram(p, index, cgram_buffer); ++ if (test_bit(USER_SPACE, &p->struct_flags)) { ++ if (copy_to_user(buffer, cgram_buffer, length)) ++ return (-EFAULT); ++ } else ++ memcpy(buffer, cgram_buffer, length); ++ } ++ ++ return (0); ++} ++ ++static int do_lcd_ioctl(struct lcd_struct *p, unsigned int cmd, unsigned long arg) ++{ ++ int i; ++ struct lcd_driver *driver = p->driver; ++ struct lcd_parameters *par = p->par; ++ unsigned char *argp = (unsigned char *)arg; ++ ++ if (! p->refcount) ++ return (-ENXIO); ++ ++ switch (cmd) { ++ case LCDL_SET_PARAM: ++ if ((i = cleanup_driver(p))) ++ return (i); ++ i = par->minor; ++ if (test_bit(USER_SPACE, &p->struct_flags)) { ++ if (copy_from_user(par, argp, sizeof(struct lcd_parameters))) ++ return (-EFAULT); ++ } else ++ memcpy(par, argp, sizeof(struct lcd_parameters)); ++ par->minor = i; ++ return (init_driver(p)); ++ ++ case LCDL_GET_PARAM: ++ if (test_bit(USER_SPACE, &p->struct_flags)) { ++ if (copy_to_user(argp, par, sizeof(struct lcd_parameters))) ++ return (-EFAULT); ++ } else ++ memcpy(argp, par, sizeof(struct lcd_parameters)); ++ return (0); ++ ++ case LCDL_RESET_CHARMAP: ++ for (i = 0; i < 256; ++i) ++ driver->charmap[i] = i; ++ return (0); ++ ++ case LCDL_CHARSUBST: ++ if (test_bit(USER_SPACE, &p->struct_flags)) { ++ get_user(i, argp); ++ get_user(driver->charmap[i], argp+1); ++ } else { ++ i = argp[0]; ++ driver->charmap[i] = argp[1]; ++ } ++ return (0); ++ ++ case LCDL_SAVE_CHARMAP: ++ memcpy(p->s_charmap, driver->charmap, 256); ++ return (0); ++ ++ case LCDL_RESTORE_CHARMAP: ++ memcpy(driver->charmap, p->s_charmap, 256); ++ return (0); ++ ++ case LCDL_SWAP_CHARMAP: ++ { ++ unsigned char *tmp; ++ ++ tmp = driver->charmap; ++ driver->charmap = p->s_charmap; ++ p->s_charmap = tmp; ++ } ++ return (0); ++ ++ case LCDL_RAW_MODE: ++ if (arg) { ++ clear_bit(NEED_WRAP, &p->struct_flags); ++ clear_bit(DECIM, &p->struct_flags); ++ clear_bit(DECAWM, &p->struct_flags); ++ SET_INPUT_STATE(p, RAW); ++ } else { ++ set_bit(DECAWM, &p->struct_flags); ++ SET_INPUT_STATE(p, NORMAL); ++ } ++ return (0); ++ ++ case LCDL_CLEAR_DISP: ++ ff(p); ++ return (0); ++ ++ case LCDL_SET_CGRAM_CHAR: ++ case LCDL_GET_CGRAM_CHAR: ++ if (p->cgram_buffer) ++ return (cgram_ioctl(p, cmd, argp)); ++ else ++ printk(KERN_NOTICE "LCD: driver %s does not support CGRAM chars\n", par->name); ++ return (0); ++ ++ case LCDL_SET_CHARMAP: ++ if (test_bit(USER_SPACE, &p->struct_flags)) { ++ if (copy_from_user(driver->charmap, argp, 256)) ++ return (-EFAULT); ++ } else ++ memcpy(driver->charmap, argp, 256); ++ return (0); ++ ++ case LCDL_GET_CHARMAP: ++ if (test_bit(USER_SPACE, &p->struct_flags)) { ++ if (copy_to_user(argp, driver->charmap, 256)) ++ return (-EFAULT); ++ } else ++ memcpy(argp, driver->charmap, 256); ++ return (0); ++ ++ case LCDL_MEMSET: ++ case LCDL_MEMMOVE: ++ { ++ int buf[3]; ++ ++ if (test_bit(USER_SPACE, &p->struct_flags)) { ++ if (copy_from_user(buf, argp, sizeof(buf))) ++ return (-EFAULT); ++ } else ++ memcpy(buf, argp, sizeof(buf)); ++ ++ if (cmd == LCDL_MEMSET) ++ lcd_memset(p, buf[0], buf[1], buf[2]); ++ else ++ lcd_memmove(p, buf[0], buf[1], buf[2]); ++ ++ return (0); ++ } ++ ++ default: ++ if (driver->handle_custom_ioctl) ++ return (driver->handle_custom_ioctl(cmd, arg, test_bit(USER_SPACE, &p->struct_flags))); ++ } ++ ++ return (-ENOIOCTLCMD); ++} ++ ++ ++ ++ ++ ++/************************************************** ++ * Kernel register/unregister lcd driver routines * ++ **************************************************/ ++/* ++ * Find a driver in lcd_drivers linked list ++ */ ++static struct lcd_struct *find_lcd_struct(unsigned short minor) ++{ ++ struct list_head *entry; ++ ++ list_for_each(entry, &lcd_drivers) { ++ struct lcd_struct *p = list_entry(entry, struct lcd_struct, lcd_list); ++ ++ if (p->par->minor == minor) ++ return (p); ++ } ++ ++ return (NULL); ++} ++ ++static void list_add_sorted(struct list_head *new) ++{ ++ struct list_head *entry; ++ unsigned short new_minor = (list_entry(new, struct lcd_struct, lcd_list))->par->minor; ++ ++ list_for_each(entry, &lcd_drivers) { ++ struct lcd_struct *p = list_entry(entry, struct lcd_struct, lcd_list); ++ ++ if (p->par->minor > new_minor) ++ break; ++ } ++ list_add_tail(new, entry); ++} ++ ++/* Exported function */ ++int lcd_register_driver(struct lcd_driver *driver, struct lcd_parameters *par) ++{ ++ int ret; ++ struct lcd_struct *p; ++#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 19) ++ struct device *lcd_device; ++#elif LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 13) ++ struct class_device *lcd_class_device; ++#endif ++ ++ if (! driver || ! par || par->minor >= minors) ++ return (-EINVAL); ++ if (! driver->write_char || ! driver->init_port || ! driver->cleanup_port) { ++ printk(KERN_ERR "LCD: missing functions\n"); ++ return (-EINVAL); ++ } ++ ++ down(&drivers_sem); ++ ++ if (find_lcd_struct(par->minor)) { ++ up(&drivers_sem); ++ return (-EBUSY); ++ } ++ ++ if ((p = (struct lcd_struct *)kmalloc(sizeof(struct lcd_struct), GFP_KERNEL)) == NULL) { ++ printk(KERN_ERR "LCD: memory allocation failed (kmalloc)\n"); ++ up(&drivers_sem); ++ return (-ENOMEM); ++ } ++ memset(p, 0, sizeof(struct lcd_struct)); ++ ++ p->driver = driver; ++ p->par = par; ++ p->refcount = 0; ++ SET_INIT_LEVEL(p, 0); ++ SET_INPUT_STATE(p, NORMAL); ++ set_bit(DECAWM, &p->struct_flags); ++ set_bit(INC_CURS_POS, &p->struct_flags); ++ ++#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 19) ++ lcd_device = device_create(lcd_linux_class, NULL, MKDEV(major, par->minor), "%s", par->name); ++ if (IS_ERR(lcd_device)) { ++ kfree(p); ++ up(&drivers_sem); ++ return (PTR_ERR(lcd_device)); ++ } ++#elif LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 15) ++ lcd_class_device = class_device_create(lcd_linux_class, NULL, MKDEV(major, par->minor), NULL, "%s", par->name); ++ if (IS_ERR(lcd_class_device)) { ++ kfree(p); ++ up(&drivers_sem); ++ return (PTR_ERR(lcd_class_device)); ++ } ++#elif LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 13) ++ lcd_class_device = class_device_create(lcd_linux_class, MKDEV(major, par->minor), NULL, "%s", par->name); ++ if (IS_ERR(lcd_class_device)) { ++ kfree(p); ++ up(&drivers_sem); ++ return (PTR_ERR(lcd_class_device)); ++ } ++#endif ++ ++#ifdef USE_PROC ++ if (lcd_proc_root && (driver->driver_proc_root = proc_mkdir(par->name, lcd_proc_root)) == NULL) ++ printk(KERN_ERR "LCD: cannot create /proc/lcd/%s/\n", par->name); ++#endif ++ ++ if ((ret = init_driver(p))) { ++#ifdef USE_PROC ++ if (driver->driver_proc_root) ++ remove_proc_entry(p->par->name, lcd_proc_root); ++#endif ++ kfree(p); ++ up(&drivers_sem); ++ return (ret); ++ } ++ ++ init_MUTEX(&p->lcd_sem); ++ ++ list_add_sorted(&p->lcd_list); ++ ++ up(&drivers_sem); ++ ++#ifdef MODULE ++#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 0) ++ try_module_get(THIS_MODULE); ++#else ++ MOD_INC_USE_COUNT; ++#endif ++#endif ++ ++ return (0); ++} ++EXPORT_SYMBOL(lcd_register_driver); ++ ++/* Exported function */ ++int lcd_unregister_driver(struct lcd_driver *driver, struct lcd_parameters *par) ++{ ++ int ret; ++ struct lcd_struct *p; ++ ++ if (! driver || ! par || par->minor >= minors) ++ return (-EINVAL); ++ ++ down(&drivers_sem); ++ ++ if ((p = find_lcd_struct(par->minor)) == NULL || p->driver != driver) { ++ printk(KERN_ERR "LCD: driver not found; lcd_unregister_driver failed\n"); ++ up(&drivers_sem); ++ return (-ENODEV); ++ } ++ ++ down(&p->lcd_sem); ++ ++ if (p->refcount) { ++ printk(KERN_ERR "LCD: driver busy; lcd_unregister_driver failed\n"); ++ up(&p->lcd_sem); ++ up(&drivers_sem); ++ return (-EBUSY); ++ } ++ ++ if ((ret = cleanup_driver(p))) { ++ up(&p->lcd_sem); ++ up(&drivers_sem); ++ return (ret); ++ } ++ ++#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 19) ++ device_destroy(lcd_linux_class, MKDEV(major, par->minor)); ++#elif LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 13) ++ class_device_destroy(lcd_linux_class, MKDEV(major, par->minor)); ++#endif ++ ++#ifdef USE_PROC ++ if (p->driver->driver_proc_root) ++ remove_proc_entry(p->par->name, lcd_proc_root); ++#endif ++ ++ list_del(&p->lcd_list); ++ kfree(p); ++ ++ up(&drivers_sem); ++ ++#ifdef MODULE ++#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 0) ++ module_put(THIS_MODULE); ++#else ++ MOD_DEC_USE_COUNT; ++#endif ++#endif ++ ++ return (0); ++} ++EXPORT_SYMBOL(lcd_unregister_driver); ++ ++ ++ ++ ++ ++/************************ ++ * Kernel I/O interface * ++ ************************/ ++/* Exported function */ ++int lcd_open(unsigned short minor, struct lcd_struct **pp) ++{ ++ int ret; ++ struct lcd_struct *p; ++ ++ down(&drivers_sem); ++ ++ if (minor >= minors || (*pp = p = find_lcd_struct(minor)) == NULL) { ++ printk(KERN_ERR "LCD: lcd_open failed. Device not found.\n"); ++ up(&drivers_sem); ++ return (-ENODEV); ++ } ++ ++ down(&p->lcd_sem); ++ up(&drivers_sem); ++ ++ ret = do_lcd_open(p); ++ ++ up(&p->lcd_sem); ++ ++ return (ret); ++} ++EXPORT_SYMBOL(lcd_open); ++ ++/* Exported function */ ++int lcd_close(struct lcd_struct **pp) ++{ ++ int ret; ++ struct lcd_struct *p; ++ ++ if (! pp || ! (p = *pp)) { ++ printk(KERN_ERR "LCD: NULL pointer in lcd_close\n"); ++ return (-ENODEV); ++ } ++ ++ down(&p->lcd_sem); ++ ++ if (! (ret = do_lcd_release(p))) ++ *pp = NULL; ++ ++ up(&p->lcd_sem); ++ ++ return (ret); ++} ++EXPORT_SYMBOL(lcd_close); ++ ++static inline loff_t offset_to_row_col(struct lcd_struct *p, loff_t offset) ++{ ++ unsigned long _offset = offset; ++ unsigned int vs_cols = p->par->vs_cols; ++ ++ gotoxy(p, _offset%vs_cols, _offset/vs_cols); ++ ++ return ((p->row*vs_cols)+p->col); ++} ++ ++/* Exported function */ ++ssize_t lcd_read(struct lcd_struct *p, void *bufp, size_t length, loff_t offset, unsigned int with_attr) ++{ ++ ssize_t ret = 0; ++ ++ if (! p) { ++ printk(KERN_ERR "LCD: NULL pointer in lcd_read\n"); ++ return (-ENODEV); ++ } ++ if (! bufp) ++ return (-EFAULT); ++ if (offset < 0 || offset >= p->fb_size) ++ return (-EINVAL); ++ ++ if (length+offset > p->fb_size) ++ length = p->fb_size-offset; ++ ++ if (with_attr) ++ set_bit(WITH_ATTR, &p->struct_flags); ++ ++ offset_to_row_col(p, offset); ++ ret = do_lcd_read(p, bufp, length); ++ ++ if (with_attr) ++ clear_bit(WITH_ATTR, &p->struct_flags); ++ ++ return (ret); ++} ++EXPORT_SYMBOL(lcd_read); ++ ++/* Exported function */ ++ssize_t lcd_write(struct lcd_struct *p, const void *bufp, size_t length, loff_t offset, unsigned int with_attr) ++{ ++ ssize_t ret; ++ ++ if (! p) { ++ printk(KERN_ERR "LCD: NULL pointer in lcd_write\n"); ++ return (-ENODEV); ++ } ++ if (! bufp) ++ return (-EFAULT); ++ if (offset < 0 || offset >= p->fb_size) ++ return (-EINVAL); ++ ++ if (with_attr) ++ set_bit(WITH_ATTR, &p->struct_flags); ++ ++ offset_to_row_col(p, offset); ++ ret = do_lcd_write(p, bufp, length); ++ ++ if (with_attr) ++ clear_bit(WITH_ATTR, &p->struct_flags); ++ ++ return (ret); ++} ++EXPORT_SYMBOL(lcd_write); ++ ++/* Exported function */ ++int lcd_ioctl(struct lcd_struct *p, unsigned int cmd, ...) ++{ ++ int ret; ++ unsigned long arg; ++ va_list ap; ++ ++ if (! p) { ++ printk(KERN_ERR "LCD: NULL pointer in lcd_ioctl\n"); ++ return (-ENODEV); ++ } ++ ++ down(&p->lcd_sem); ++ va_start(ap, cmd); ++ arg = va_arg(ap, unsigned long); ++ ret = do_lcd_ioctl(p, cmd, arg); ++ va_end(ap); ++ up(&p->lcd_sem); ++ ++ return (ret); ++} ++EXPORT_SYMBOL(lcd_ioctl); ++ ++ ++ ++ ++ ++/******************* ++ * File operations * ++ *******************/ ++static loff_t lcd_fops_llseek(struct file *filp, loff_t offset, int orig) ++{ ++ struct lcd_struct *p; ++ ++ if (! (p = filp->private_data)) ++ return (-ENODEV); ++ ++ down(&p->lcd_sem); ++ ++ switch (orig) { ++ case 0: ++ filp->f_pos = offset; ++ break; ++ ++ case 1: ++ filp->f_pos += offset; ++ break; ++ ++ default: ++ up(&p->lcd_sem); ++ return (-EINVAL); /* SEEK_END not supported */ ++ } ++ ++ filp->f_pos = offset_to_row_col(p, filp->f_pos); ++ ++ up(&p->lcd_sem); ++ ++ return (filp->f_pos); ++} ++ ++static ssize_t lcd_fops_read(struct file *filp, char *buffer, size_t length, loff_t *offp) ++{ ++ ssize_t ret = 0; ++ char *bufp = buffer; ++ struct lcd_struct *p; ++ ++ if (! bufp) ++ return (-EFAULT); ++ if (! (p = filp->private_data)) ++ return (-ENODEV); ++ ++ down(&p->lcd_sem); ++ ++ if (*offp < 0 || *offp >= p->fb_size) { ++ up(&p->lcd_sem); ++ return (-EINVAL); ++ } ++ ++ if (length+(*offp) > p->fb_size) ++ length = p->fb_size-(*offp); ++ ++ while (length) { ++ ret = (length > FLIP_BUF_SIZE ? FLIP_BUF_SIZE : length); ++ if ((ret = do_lcd_read(p, p->flip_buf, ret)) < 0) ++ break; ++ *offp = (p->row*p->par->vs_cols)+p->col; ++ if (copy_to_user(bufp, p->flip_buf, ret)) { ++ ret = -EFAULT; ++ break; ++ } ++ length -= ret; ++ bufp += ret; ++ ret = bufp-buffer; ++ if (length) ++ schedule(); ++ } ++ ++ up(&p->lcd_sem); ++ ++ return (ret); ++} ++ ++static ssize_t lcd_fops_write(struct file *filp, const char *buffer, size_t length, loff_t *offp) ++{ ++ ssize_t ret = 0; ++ const char *bufp = buffer; ++ struct lcd_struct *p; ++ ++ if (! bufp) ++ return (-EFAULT); ++ if (! (p = filp->private_data)) ++ return (-ENODEV); ++ ++ down(&p->lcd_sem); ++ ++ if (*offp < 0 || *offp >= p->fb_size) { ++ up(&p->lcd_sem); ++ return (-EINVAL); ++ } ++ ++ while (length) { ++ ret = (length > FLIP_BUF_SIZE ? FLIP_BUF_SIZE : length); ++ if (copy_from_user(p->flip_buf, bufp, ret)) { ++ ret = -EFAULT; ++ break; ++ } ++ if ((ret = do_lcd_write(p, p->flip_buf, ret)) < 0) ++ break; ++ *offp = (p->row*p->par->vs_cols)+p->col; ++ length -= ret; ++ bufp += ret; ++ ret = bufp-buffer; ++ if (length) ++ schedule(); ++ } ++ ++ up(&p->lcd_sem); ++ ++ return (ret); ++} ++ ++static int lcd_fops_open(struct inode *inop, struct file *filp) ++{ ++ unsigned short minor; ++ int ret; ++ struct lcd_struct *p; ++ ++ down(&drivers_sem); ++ ++ if ((minor = MINOR(inop->i_rdev)) >= minors || (filp->private_data = p = find_lcd_struct(minor)) == NULL) { ++ up(&drivers_sem); ++ return (-ENODEV); ++ } ++ ++ down(&p->lcd_sem); ++ up(&drivers_sem); ++ ++ ret = do_lcd_open(p); ++ ++ up(&p->lcd_sem); ++ ++ return (ret); ++} ++ ++static int lcd_fops_release(struct inode *inop, struct file *filp) ++{ ++ struct lcd_struct *p; ++ int ret; ++ ++ if (! (p = filp->private_data)) ++ return (-ENODEV); ++ ++ down(&p->lcd_sem); ++ ++ if (! (ret = do_lcd_release(p))) ++ filp->private_data = NULL; ++ ++ up(&p->lcd_sem); ++ ++ return (ret); ++} ++ ++static int lcd_fops_ioctl(struct inode *inop, struct file *filp, unsigned int cmd, unsigned long arg) ++{ ++ struct lcd_struct *p; ++ int ret; ++ ++ if (! (p = filp->private_data)) ++ return (-ENODEV); ++ ++ down(&p->lcd_sem); ++ ++ set_bit(USER_SPACE, &p->struct_flags); ++ ret = do_lcd_ioctl(p, cmd, arg); ++ clear_bit(USER_SPACE, &p->struct_flags); ++ ++ up(&p->lcd_sem); ++ ++ return (ret); ++} ++ ++static struct file_operations lcd_linux_fops = { ++#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 4, 0) ++ .owner = THIS_MODULE, ++#endif ++ .llseek = lcd_fops_llseek, ++ .read = lcd_fops_read, ++ .write = lcd_fops_write, ++ .open = lcd_fops_open, ++ .release = lcd_fops_release, ++ .ioctl = lcd_fops_ioctl, ++}; ++ ++ ++ ++ ++ ++/******************************** ++ * Init/Cleanup driver routines * ++ ********************************/ ++static int do_init_driver(struct lcd_struct *p) ++{ ++ int ret, init_level; ++ struct lcd_driver *driver = p->driver; ++ struct lcd_parameters *par = p->par; ++ unsigned int frame_rows = par->cntr_rows*par->num_cntr; ++ unsigned int frame_cols = par->cntr_cols; ++ ++ switch ((init_level = INIT_LEVEL(p))) { ++ case 0: ++ if (frame_rows == 0 || frame_cols == 0 || ! par->name) { ++ printk(KERN_ERR "LCD: wrong lcd parameters\n"); ++ return (-EINVAL); ++ } ++ if (driver->validate_driver) { ++ if ((ret = driver->validate_driver()) < 0) { ++ printk(KERN_ERR "LCD: validate_driver failed\n"); ++ return (-EINVAL); ++ } else if (ret > 0) { ++ set_bit(CAN_DO_COLOR, &p->struct_flags); ++ p->defcolor = 0x07; ++ p->ulcolor = 0x0f; ++ p->halfcolor = 0x08; ++ } ++ } ++ default_attr(p); ++ update_attr(p); ++ p->frame_size = frame_rows*frame_cols; ++ if (par->vs_rows < frame_rows) ++ par->vs_rows = frame_rows; ++ if (par->vs_cols < frame_cols) ++ par->vs_cols = frame_cols; ++ p->fb_size = par->vs_rows*par->vs_cols; ++ ++ ret = sizeof(short)*p->fb_size; ++ ret += sizeof(short)*p->frame_size; ++ ret += FLIP_BUF_SIZE; ++ ret += (p->driver->charmap ? 256 : 512); ++ ret += par->cgram_chars*par->cgram_bytes; ++ if ((p->fb = (unsigned short *)vmalloc(ret)) == NULL) { ++ printk(KERN_ERR "LCD: memory allocation failed (vmalloc)\n"); ++ return (-ENOMEM); ++ } ++ __memset_short(p->fb, p->erase_char, p->fb_size+p->frame_size); ++ ++ p->display = p->fb+p->fb_size; ++ p->flip_buf = (unsigned char *)(p->display+p->frame_size); ++ ++ if (! p->driver->charmap) { ++ set_bit(NULL_CHARMAP, &p->struct_flags); ++ p->driver->charmap = p->flip_buf+FLIP_BUF_SIZE; ++ for (ret = 0; ret < 256; ++ret) ++ p->driver->charmap[ret] = ret; ++ p->s_charmap = p->driver->charmap+256; ++ } else ++ p->s_charmap = p->flip_buf+FLIP_BUF_SIZE; ++ memset(p->s_charmap, 0, 256); ++ ++ if (par->cgram_chars*par->cgram_bytes) { ++ p->cgram_buffer = p->s_charmap+256; ++ memset(p->cgram_buffer, 0, par->cgram_chars*par->cgram_bytes); ++ } else ++ p->cgram_buffer = NULL; ++ ++ p->frame_base = 0; ++ p->row = p->col = 0; ++ p->top = 0; ++ p->bot = par->vs_rows; ++ SET_INIT_LEVEL(p, ++init_level); ++ ++ case 1: ++ /* Initialize the communication port */ ++ if ((ret = driver->init_port())) { ++ printk(KERN_ERR "LCD: failure while initializing the communication port\n"); ++ return (ret); ++ } ++ SET_INIT_LEVEL(p, ++init_level); ++ ++ case 2: ++ /* Initialize LCD display */ ++ if (driver->init_display && (ret = driver->init_display())) { ++ printk(KERN_ERR "LCD: failure while initializing the display\n"); ++ return (ret); ++ } ++ ++#ifdef USE_PROC ++ /* Create entries in /proc/lcd/"driver" */ ++ if (driver->driver_proc_root) ++ create_driver_proc_entries(p); ++#endif ++ SET_INIT_LEVEL(p, ++init_level); ++ } ++ ++ return (0); ++} ++ ++static int do_cleanup_driver(struct lcd_struct *p) ++{ ++ int ret, init_level; ++ struct lcd_driver *driver = p->driver; ++ ++ switch ((init_level = INIT_LEVEL(p))) { ++ case 3: ++#ifdef USE_PROC ++ if (driver->driver_proc_root) ++ remove_driver_proc_entries(p); ++#endif ++ if (driver->cleanup_display && (ret = driver->cleanup_display())) { ++ printk(KERN_ERR "LCD: failure while cleaning the display\n"); ++ return (ret); ++ } ++ SET_INIT_LEVEL(p, --init_level); ++ ++ case 2: ++ if ((ret = driver->cleanup_port())) { ++ printk(KERN_ERR "LCD: failure while cleaning the communication port\n"); ++ return (ret); ++ } ++ SET_INIT_LEVEL(p, --init_level); ++ ++ case 1: ++ if (test_bit(NULL_CHARMAP, &p->struct_flags)) { ++ p->driver->charmap = NULL; ++ clear_bit(NULL_CHARMAP, &p->struct_flags); ++ } ++ vfree(p->fb); ++ p->fb = NULL; ++ SET_INIT_LEVEL(p, --init_level); ++ } ++ ++ return (0); ++} ++ ++static int init_driver(struct lcd_struct *p) ++{ ++ int ret; ++ ++ if ((ret = do_init_driver(p))) { ++ do_cleanup_driver(p); ++ printk(KERN_ERR "LCD: init_driver failed\n"); ++ } ++ ++ return (ret); ++} ++ ++static int cleanup_driver(struct lcd_struct *p) ++{ ++ int ret; ++ ++ if ((ret = do_cleanup_driver(p))) { ++ do_init_driver(p); ++ printk(KERN_ERR "LCD: cleanup_driver failed\n"); ++ } ++ ++ return (ret); ++} ++ ++ ++ ++ ++ ++/******************************** ++ * Init/Cleanup module routines * ++ ********************************/ ++static int __init lcd_linux_init_module(void) ++{ ++ int ret; ++ ++ if (! minors || minors > 256) ++ minors = LCD_MINORS; ++ ++ init_MUTEX(&drivers_sem); ++ ++ if ((ret = register_chrdev(major, LCD_LINUX_STRING, &lcd_linux_fops)) < 0) { ++ printk(KERN_ERR "LCD: register_chrdev failed\n"); ++ return (ret); ++ } ++ if (major == 0) ++ major = ret; ++ ++#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 13) ++ if (IS_ERR((lcd_linux_class = class_create(THIS_MODULE, "lcd")))) { ++ ret = PTR_ERR(lcd_linux_class); ++ unregister_chrdev(major, LCD_LINUX_STRING); ++ return (ret); ++ } ++#endif ++ ++#ifdef USE_PROC ++#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 26) ++ if ((lcd_proc_root = proc_mkdir("lcd", NULL)) == NULL) ++#else ++ if ((lcd_proc_root = proc_mkdir("lcd", &proc_root)) == NULL) ++#endif ++ printk(KERN_ERR "LCD: cannot create /proc/lcd/\n"); ++ else if (create_proc_read_entry("drivers", 0, lcd_proc_root, proc_registered_drivers, NULL) == NULL) ++ printk(KERN_ERR "LCD: cannot create /proc/lcd/drivers\n"); ++#endif ++ ++ printk(KERN_INFO "LCD: --> LCD-Linux " LCD_LINUX_VERSION " <--\n"); ++ printk(KERN_INFO "LCD: --> Mattia Jona-Lasinio <mjona@users.sourceforge.net> <--\n" ); ++ ++ ++ return (0); ++} ++ ++#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 4, 0) ++static void __exit lcd_linux_cleanup_module(void) ++#else ++/* __exit is not defined in 2.2.x kernels */ ++static void lcd_linux_cleanup_module(void) ++#endif ++{ ++#ifdef USE_PROC ++ if (lcd_proc_root) { ++ remove_proc_entry("drivers", lcd_proc_root); ++#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 26) ++ remove_proc_entry("lcd", NULL); ++#else ++ remove_proc_entry("lcd", &proc_root); ++#endif ++ } ++#endif ++ ++#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 13) ++ class_destroy(lcd_linux_class); ++#endif ++ ++#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 23) ++ unregister_chrdev(major, LCD_LINUX_STRING); ++#else ++ if (unregister_chrdev(major, LCD_LINUX_STRING)) ++ printk(KERN_ERR "LCD: unregister_chrdev failed\n"); ++#endif ++} ++ ++module_init(lcd_linux_init_module) ++module_exit(lcd_linux_cleanup_module) +Index: linux-2.6.30.9/include/linux/hd44780.h +=================================================================== +--- /dev/null 1970-01-01 00:00:00.000000000 +0000 ++++ linux-2.6.30.9/include/linux/hd44780.h 2009-11-24 02:01:42.000000000 +0100 +@@ -0,0 +1,46 @@ ++/* hd44780.h ++ * ++ * ++ * LCD-Linux: ++ * Driver for HD44780 compatible displays connected to the parallel port. ++ * ++ * HD44780 header file. ++ * ++ * Copyright (C) 2004 - 2007 Mattia Jona-Lasinio (mjona@users.sourceforge.net) ++ * ++ * This program is free software; you can redistribute it and/or modify ++ * it under the terms of the GNU General Public License as published by ++ * the Free Software Foundation; either version 2 of the License, or ++ * (at your option) any later version. ++ * ++ * This program is distributed in the hope that it will be useful, ++ * but WITHOUT ANY WARRANTY; without even the implied warranty of ++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the ++ * GNU General Public License for more details. ++ * ++ * You should have received a copy of the GNU General Public License ++ * along with this program; if not, write to the Free Software ++ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA ++ * ++ */ ++ ++#ifndef HD44780_H ++#define HD44780_H ++ ++#include <linux/lcd-linux.h> ++ ++#define HD44780_VERSION LCD_LINUX_VERSION /* Version number */ ++#define HD44780_STRING "hd44780" ++ ++#define HD44780_MINOR 0 /* Minor number for the hd44780 driver */ ++ ++ ++/* flags */ ++#define HD44780_CHECK_BF 0x00000001 /* Do busy flag checking */ ++#define HD44780_4BITS_BUS 0x00000002 /* Set the bus length to 4 bits */ ++#define HD44780_5X10_FONT 0x00000004 /* Use 5x10 dots fonts */ ++ ++/* IOCTLs */ ++#define HD44780_READ_AC _IOR(LCD_MAJOR, 0x00, unsigned char *) ++ ++#endif /* HD44780 included */ +Index: linux-2.6.30.9/include/linux/lcd-linux.h +=================================================================== +--- /dev/null 1970-01-01 00:00:00.000000000 +0000 ++++ linux-2.6.30.9/include/linux/lcd-linux.h 2009-11-24 02:01:42.000000000 +0100 +@@ -0,0 +1,151 @@ ++/* lcd-linux.h ++ * ++ * ++ * Software layer to drive LCD displays under Linux. ++ * ++ * External interface header file. ++ * ++ * Copyright (C) 2005 - 2007 Mattia Jona-Lasinio (mjona@users.sourceforge.net) ++ * ++ * This program is free software; you can redistribute it and/or modify ++ * it under the terms of the GNU General Public License as published by ++ * the Free Software Foundation; either version 2 of the License, or ++ * (at your option) any later version. ++ * ++ * This program is distributed in the hope that it will be useful, ++ * but WITHOUT ANY WARRANTY; without even the implied warranty of ++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the ++ * GNU General Public License for more details. ++ * ++ * You should have received a copy of the GNU General Public License ++ * along with this program; if not, write to the Free Software ++ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA ++ * ++ */ ++ ++#ifndef LCD_LINUX_H ++#define LCD_LINUX_H ++ ++#ifndef LCD_LINUX_MAIN ++#warning ++#warning LCD-Linux is still in development stage and ++#warning aims at speed and optimization. For these ++#warning reasons there is no guarantee of backward ++#warning compatibility between different LCD-Linux ++#warning versions. Be sure to use the lcd-linux.h ++#warning file of the same version as the module. ++#warning "http://lcd-linux.sourceforge.net/" ++#warning ++#endif ++ ++#define LCD_LINUX_VERSION "0.13.6" /* Version number */ ++#define LCD_LINUX_STRING "lcd" ++ ++#define LCD_MAJOR 120 /* Major number for this device ++ * Set this to 0 for dynamic allocation ++ */ ++#define LCD_MINORS 8 /* Minors allocated for LCD-Linux*/ ++ ++#include <linux/types.h> ++ ++#define str(s) #s ++#define string(s) str(s) ++ ++struct lcd_parameters { ++ const char *name; /* Driver's name */ ++ unsigned long flags; /* Flags (see documentation) */ ++ unsigned short minor; /* Minor number of the char device */ ++ unsigned short tabstop; /* Tab character length */ ++ unsigned short num_cntr; /* Controllers to drive */ ++ unsigned short cntr_rows; /* Rows per controller */ ++ unsigned short cntr_cols; /* Display columns */ ++ unsigned short vs_rows; /* Virtual screen rows */ ++ unsigned short vs_cols; /* Virtual screen columns */ ++ unsigned short cgram_chars; /* Number of user definable characters */ ++ unsigned short cgram_bytes; /* Number of bytes required to define a ++ * user definable character */ ++ unsigned char cgram_char0; /* Ascii of first user definable character */ ++}; ++ ++/* IOCTLs */ ++#include <asm/ioctl.h> ++#define LCDL_SET_PARAM _IOW(LCD_MAJOR, 0x80, struct lcd_parameters *) ++#define LCDL_GET_PARAM _IOR(LCD_MAJOR, 0x81, struct lcd_parameters *) ++#define LCDL_CHARSUBST _IOW(LCD_MAJOR, 0x82, unsigned char *) ++#define LCDL_RAW_MODE _IOW(LCD_MAJOR, 0x83, unsigned int) ++#define LCDL_RESET_CHARMAP _IO(LCD_MAJOR, 0x84) ++#define LCDL_SAVE_CHARMAP _IO(LCD_MAJOR, 0x85) ++#define LCDL_RESTORE_CHARMAP _IO(LCD_MAJOR, 0x86) ++#define LCDL_SWAP_CHARMAP _IO(LCD_MAJOR, 0x87) ++#define LCDL_CLEAR_DISP _IO(LCD_MAJOR, 0x88) ++#define LCDL_SET_CGRAM_CHAR _IOW(LCD_MAJOR, 0x89, unsigned char *) ++#define LCDL_GET_CGRAM_CHAR _IOR(LCD_MAJOR, 0x8a, unsigned char *) ++#define LCDL_SET_CHARMAP _IOW(LCD_MAJOR, 0x8b, unsigned char *) ++#define LCDL_GET_CHARMAP _IOR(LCD_MAJOR, 0x8c, unsigned char *) ++#define LCDL_MEMSET _IOW(LCD_MAJOR, 0x8d, unsigned int *) ++#define LCDL_MEMMOVE _IOW(LCD_MAJOR, 0x8e, unsigned int *) ++ ++ ++ ++#ifdef __KERNEL__ /* The rest is for kernel only */ ++ ++#include <linux/kernel.h> ++#include <linux/module.h> ++ ++ ++struct lcd_driver { ++ void (*read_char)(unsigned int offset, unsigned short *data); ++ void (*read_cgram_char)(unsigned char index, unsigned char *pixmap); ++ void (*write_char)(unsigned int offset, unsigned short data); ++ void (*write_cgram_char)(unsigned char index, unsigned char *pixmap); ++ void (*clear_display)(void); ++ void (*address_mode)(int mode); ++ int (*validate_driver)(void); ++ int (*init_display)(void); ++ int (*cleanup_display)(void); ++ int (*init_port)(void); ++ int (*cleanup_port)(void); ++ int (*handle_custom_char)(unsigned int data); ++ int (*handle_custom_ioctl)(unsigned int cmd, unsigned long arg, unsigned int arg_in_userspace); ++ ++ /* The character map to be used */ ++ unsigned char *charmap; ++ ++ /* The root where the driver can create its own proc files. ++ * Will be filled by the lcd-linux layer. ++ */ ++ struct proc_dir_entry *driver_proc_root; ++ ++ /* Set this field to 'driver_module_init' or call lcd_driver_setup ++ * just before registering the driver with lcd_register_driver. ++ */ ++ struct module *driver_module; ++}; ++ ++#ifdef MODULE ++#define driver_module_init THIS_MODULE ++#else ++#define driver_module_init NULL ++#endif ++ ++/* Always call lcd_driver_setup just before registering the driver ++ * with lcd_register_driver. ++ */ ++static inline void lcd_driver_setup(struct lcd_driver *p) ++{ ++ p->driver_module = driver_module_init; ++} ++ ++/* External interface */ ++struct lcd_struct; ++int lcd_register_driver(struct lcd_driver *drv, struct lcd_parameters *par); ++int lcd_unregister_driver(struct lcd_driver *drv, struct lcd_parameters *par); ++int lcd_open(unsigned short minor, struct lcd_struct **lcd); ++int lcd_close(struct lcd_struct **lcd); ++int lcd_ioctl(struct lcd_struct *lcd, unsigned int cmd, ...); ++ssize_t lcd_write(struct lcd_struct *lcd, const void *buffer, size_t length, loff_t offset, unsigned int); ++ssize_t lcd_read(struct lcd_struct *lcd, void *buffer, size_t length, loff_t offset, unsigned int); ++ ++#endif /* __KERNEL__ */ ++ ++#endif /* External interface included */ |