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Subject[PATCH 1/1 Re] drivers: add lcd display support
Please tell me if you agree.

Adds LCD Display support.
Adds ks0108 LCD controller support.
Adds cfag12864b LCD display support.

Signed-off-by: Miguel Ojeda Sandonis <maxextreme@gmail.com>
---
diff -uprN -X linux-2.6.18-rc7/Documentation/dontdiff linux-2.6.18-rc7-vanilla/Documentation/drivers/lcddisplay/cfag12864b linux-2.6.18-rc7/Documentation/drivers/lcddisplay/cfag12864b
--- linux-2.6.18-rc7-vanilla/Documentation/drivers/lcddisplay/cfag12864b 1970-01-01 01:00:00.000000000 +0100
+++ linux-2.6.18-rc7/Documentation/drivers/lcddisplay/cfag12864b 2006-09-13 15:12:59.000000000 +0200
@@ -0,0 +1,367 @@
+ ===============================
+ cfag12864b Driver Documentation
+ ===============================
+
+License: GPL
+Author & Maintainer: Miguel Ojeda Sandonis <maxextreme@gmail.com>
+Date: 2006-09-12
+
+
+
+--------
+0. INDEX
+--------
+
+ 1. DEVICE INFORMATION
+ 2. WIRING
+ 3. USER-SPACE PROGRAMMING
+ 3.1. ioctl and a 128*64 boolean matrix
+ 3.2. Direct writing
+ 4. USEFUL FILES
+ 4.1. cfag12864b.h
+ 4.2. bmpwriter.h
+
+
+
+---------------------
+1. DEVICE INFORMATION
+---------------------
+
+Manufacturer: Crystalfontz
+Webpage: http://www.crystalfontz.com
+Device Webpage: http://www.crystalfontz.com/products/12864b/
+Type: LCD Display
+Width: 128
+Height: 64
+Colors: 2
+Controller: ks0108
+Controllers: 2
+Pages: 8 each controller
+Addresses: 64 each page
+
+
+
+---------
+2. WIRING
+---------
+
+The cfag12864b LCD Display Series don't have a official wiring.
+
+The common wiring is done to the parallel port:
+
+http://www.skippari.net/lcd/sekalaista/crystalfontz_cfag12864B-TMI-V.png
+
+You can get help at Crystalfontz and LCDInfo forums.
+
+
+
+-------------------------
+3. USER-SPACE PROGRAMMING
+-------------------------
+
+Include a copy of the provided header:
+
+ #include "cfag12864b.h"
+
+Open the device for writing, /dev/cfag12864b0:
+
+ int fd = open("/dev/cfag12864b0",O_WRONLY);
+
+Then use simple ioctl calls to control it:
+
+ ioctl(fdisplay,CFAG12864B_IOCOFF); /* Turn off (don't clear) */
+ ioctl(fdisplay,CFAG12864B_IOCON); /* Turn on */
+ ioctl(fdisplay,CFAG12864B_IOCCLEAR); /* Clear the display */
+
+For writing to the display, you have two options:
+
+
+3.1. ioctl & 128*64 boolean matrix
+-------------------------------------------------------
+
+This method is easier, but you have to update the entire display
+each time you want to change it.
+
+Note:
+
+ CFAG12864B_FORMATSIZE ==
+ CFAG12864B_WIDTH * CFAG12864B_HEIGHT ==
+ 128 * 64
+
+Declare the matrix and other one:
+
+ unsigned char MyDrawing[CFAG12864B_WIDTH][CFAG12864B_HEIGHT];
+
+ unsigned char Buffer[CFAG12864B_FORMATSIZE];
+
+Copy the 2d matrix to the buffer , like:
+
+ for(i=0;i<CFAG12864B_WIDTH;++i)
+ for(j=0;j<CFAG12864B_HEIGHT;++j)
+ Buffer[i+j*CFAG12864B_WIDTH]=MyDrawing[i][j];
+
+Call the ioctl:
+
+ ioctl(fdisplay,CFAG12864B_IOCFORMAT,Buffer);
+
+Voila! Your drawing should appear on the screen.
+
+
+
+3.2. Direct writing
+-------------------
+
+This methods allows you to change each byte of the device,
+so you can achieve a higher update rate.
+
+The device size is 1024 == CFAG12864B_SIZE.
+
+You can write and seek the device. The first 512 bytes write to
+the first k0108 controller (left display half) and the last 512 bytes
+write to the second ks0108 controller (right display half).
+
+Each controller is divided into 8 pages. Each page has 64 bytes.
+
+ Controller 0 Controller 1
+ _________________________
+Page 0 |____________|____________|
+Page 1 |____________|____________|
+Page 2 |____________|____________|
+Page 3 |____________|____________|
+Page 4 |____________|____________|
+Page 5 |____________|____________|
+Page 6 |____________|____________|
+Page 7 |____________|____________|
+ <--- 64 --->
+
+You will understand how the device work executing some commands:
+
+ # echo -n A > /dev/cfag12864b0
+ # echo -n a > /dev/cfag12864b0
+ # echo AAAAAA > /dev/cfag12864b0
+ # echo 000000 > /dev/cfag12864b0
+ # echo Hello world! > /dev/cfag12864b0
+ # echo Hello world! Hello world! > /dev/cfag12864b0
+
+After you understand it, code your functions to change specific bytes.
+
+Use write() and lseek() system calls, like:
+
+ lseek(fdisplay,ipage*CFAG12864B_HEIGHT,SEEK_SET);
+ lseek(fdisplay,icontroller*CFAG12864B_SIZE/2,SEEK_SET);
+
+ write(fdisplay,bufpage,CFAG12864B_HEIGHT);
+ write(fdisplay,bufcontroller,CFAG12864B_SIZE/2);
+ write(fdisplay,bufdisplay,CFAG12864B_SIZE);
+
+
+---------------
+4. USEFUL FILES
+---------------
+
+
+4.1 cfag12864b.h
+----------------
+
+You can use a copy of this header in your user-space programs.
+
+---
+/*
+ * Filename: cfag12864b.h
+ * Version: 0.1.0
+ * Description: cfag12864b LCD Display Driver Header for user-space apps
+ *
+ * Author: Miguel Ojeda Sandonis <maxextreme@gmail.com>
+ * Date: 2006-09-12
+ */
+
+#ifndef _CFAG12864B_H_
+#define _CFAG12864B_H_
+
+#include <sys/ioctl.h>
+
+#define CFAG12864B_WIDTH 128
+#define CFAG12864B_HEIGHT 64
+#define CFAG12864B_FORMATSIZE CFAG12864B_WIDTH*CFAG12864B_HEIGHT
+#define CFAG12864B_SIZE 1024
+
+#define CFAG12864B_IOC_MAGIC 0xFF
+
+#define CFAG12864B_IOCOFF _IO(CFAG12864B_IOC_MAGIC,0)
+#define CFAG12864B_IOCON _IO(CFAG12864B_IOC_MAGIC,1)
+#define CFAG12864B_IOCCLEAR _IO(CFAG12864B_IOC_MAGIC,2)
+#define CFAG12864B_IOCFORMAT _IOW(CFAG12864B_IOC_MAGIC,3,void *)
+
+#endif // _CFAG12864B_H_
+---
+
+
+
+4.2 Example BMP writer
+----------------------
+
+You can take ideas from this code. It reads a .bmp 128x64 2-colors file,
+convert it to a boolean [128*64] buffer and then use
+ioctl to display it on the screen.
+
+---
+/*
+ * Filename: bmpwriter.h
+ * Version: 0.1.0
+ * Description: BMP Writer sample app
+ *
+ * Author: Miguel Ojeda Sandonis <maxextreme@gmail.com>
+ * Date: 2006-09-12
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+
+#include "cfag12864b.h"
+
+#define BMP_SIZE 1024
+
+union dword
+{
+ unsigned int u32;
+ unsigned char u8[4];
+};
+
+#define Bit(n) ((unsigned char)(1<<(n)))
+
+void BMP2Format(
+ unsigned char _Src[BMP_SIZE],
+ unsigned char _Dest[CFAG12864B_FORMATSIZE])
+{
+ const unsigned int Width = CFAG12864B_WIDTH;
+ const unsigned int Height = CFAG12864B_HEIGHT;
+ const unsigned int Bits = 8;
+
+ unsigned int Y,X,Bit;
+
+ for(Y=0; Y<Height; ++Y)
+ for(X=0; X<Width/Bits; ++X)
+ for(Bit=0; Bit<Bits; ++Bit)
+ _Dest[X*Bits+Bit+(Height-Y-1)*Width] =
+ _Src[Y*Width/Bits+X]&Bit(Bits-Bit-1)?0:1;
+}
+
+int main(int argc, char * argv[])
+{
+ const unsigned int Width = CFAG12864B_WIDTH;
+ const unsigned int Height = CFAG12864B_HEIGHT;
+ const unsigned int Size = CFAG12864B_SIZE;
+ const unsigned int BPP = 1;
+ const unsigned int HeaderSize = 0x3E;
+ const unsigned int BMPSize = BMP_SIZE;
+
+ unsigned char c;
+ unsigned int i,j;
+ union dword n;
+
+ unsigned char Buffer_BMP[BMP_SIZE];
+ unsigned char Buffer_Matrix[CFAG12864B_FORMATSIZE];
+
+ int fdisplay;
+ FILE * fbmp;
+
+ // Check args
+ if(argc!=3) {
+ printf("%s: Bad number of arguments. Expected 3\n",
+ argv[0]);
+ return -1;
+ }
+
+ // Open file
+ fbmp = fopen(argv[2],"rb");
+ if(fbmp==NULL) {
+ printf("%s: Can't open %s\n",argv[0], argv[2]);
+ return -2;
+ }
+
+ // Check file size
+ fseek(fbmp,0,SEEK_END);
+ i=ftell(fbmp);
+ if(i!=HeaderSize+Size) {
+ printf("%s: Bad file size. %i instead of %i\n",
+ argv[0], i, HeaderSize+Size);
+ fclose(fbmp);
+ return -3;
+ }
+
+ // Check both magic BMP bytes
+ fseek(fbmp,0,SEEK_SET);
+ c = fgetc(fbmp);
+ if(c!='B') {
+ printf("%s: Bad first magic byte. '%c' instead of 'B'\n",
+ argv[0], c);
+ fclose(fbmp);
+ return -4;
+ }
+ c = fgetc(fbmp);
+ if(c!='M') {
+ printf("%s: Bad second magic byte. '%c' instead of 'M'\n",
+ argv[0], c);
+ fclose(fbmp);
+ return -5;
+ }
+
+ // Check this is a 128x64 1-bpp BMP file
+ fseek(fbmp,0x12,SEEK_SET);
+ for(i=0; i<4; ++i)
+ n.u8[i] = fgetc(fbmp);
+ if(n.u32!=Width) {
+ printf("%s: Bad width. %i instead of %i\n",
+ argv[0], n.u32, Width);
+ fclose(fbmp);
+ return -6;
+ }
+ for(i=0; i<4; ++i)
+ n.u8[i] = fgetc(fbmp);
+ if(n.u32!=Height) {
+ printf("%s: Bad width. %i instead of %i\n",
+ argv[0], n.u32, Height);
+ fclose(fbmp);
+ return -7;
+ }
+ fseek(fbmp,0x1C,SEEK_SET);
+ c = fgetc(fbmp);
+ if(c!=BPP) {
+ printf("%s: Bad bpp. %i instead of %i\n",
+ argv[0], c, BPP);
+ fclose(fbmp);
+ return -8;
+ }
+
+ // Get bitmap data
+ fseek(fbmp,0x3E,SEEK_SET);
+ fread(Buffer_BMP,1,BMPSize,fbmp);
+ fclose(fbmp);
+
+ // Transform BMP data to 2D matrix
+ BMP2Format(Buffer_BMP,Buffer_Matrix);
+
+ // Open file
+ fdisplay = open(argv[1],O_WRONLY);
+ if(fdisplay < 0) {
+ printf("%s: Can't open %s\n", argv[0], argv[1]);
+ return -9;
+ }
+
+ // Send matrix
+ ioctl(fdisplay,CFAG12864B_IOCFORMAT,Buffer_Matrix);
+
+ // Close file
+ close(fdisplay);
+
+ return 0;
+}
+---
+
+
+EOF
diff -uprN -X linux-2.6.18-rc7/Documentation/dontdiff linux-2.6.18-rc7-vanilla/Documentation/drivers/lcddisplay/lcddisplay linux-2.6.18-rc7/Documentation/drivers/lcddisplay/lcddisplay
--- linux-2.6.18-rc7-vanilla/Documentation/drivers/lcddisplay/lcddisplay 1970-01-01 01:00:00.000000000 +0100
+++ linux-2.6.18-rc7/Documentation/drivers/lcddisplay/lcddisplay 2006-09-12 18:56:56.000000000 +0200
@@ -0,0 +1,37 @@
+ =================================
+ LCD Display Drivers Documentation
+ =================================
+
+License: GPL
+Author & Maintainer: Miguel Ojeda Sandonis <maxextreme@gmail.com>
+Date: 2006-09-12
+
+--------
+0. INDEX
+--------
+
+ 1. NEW DISPLAY DRIVERS
+ 2. GENERAL TIPS
+
+
+
+----------------------
+1. NEW DISPLAY DRIVERS
+----------------------
+
+Feel free to send me new display drivers. I will try to do my best.
+
+If you don't get any answer, send your patch directly to the linux-kernel ml.
+
+
+
+---------------
+2. GENERAL TIPS
+---------------
+
+- Divide your driver into the controller driver, like ks0108,
+ and the specific LCD display series driver, like cfag12864b.
+
+- Claim for your IO ports in the controller driver.
+
+EOF
diff -uprN -X linux-2.6.18-rc7/Documentation/dontdiff linux-2.6.18-rc7-vanilla/Documentation/ioctl-number.txt linux-2.6.18-rc7/Documentation/ioctl-number.txt
--- linux-2.6.18-rc7-vanilla/Documentation/ioctl-number.txt 2006-09-13 14:01:33.000000000 +0200
+++ linux-2.6.18-rc7/Documentation/ioctl-number.txt 2006-09-13 14:10:08.000000000 +0200
@@ -191,3 +191,5 @@ Code Seq# Include File Comments
<mailto:aherrman@de.ibm.com>
0xF3 00-3F video/sisfb.h sisfb (in development)
<mailto:thomas@winischhofer.net>
+0xFF 00-1F linux/cfag12864b.h cfag12864b LCD Display Driver
+ <mailto:maxextreme@gmail.com>
diff -uprN -X linux-2.6.18-rc7/Documentation/dontdiff linux-2.6.18-rc7-vanilla/drivers/Kconfig linux-2.6.18-rc7/drivers/Kconfig
--- linux-2.6.18-rc7-vanilla/drivers/Kconfig 2006-09-13 14:01:46.000000000 +0200
+++ linux-2.6.18-rc7/drivers/Kconfig 2006-09-13 14:06:15.000000000 +0200
@@ -74,4 +74,6 @@ source "drivers/rtc/Kconfig"

source "drivers/dma/Kconfig"

+source "drivers/lcddisplay/Kconfig"
+
endmenu
diff -uprN -X linux-2.6.18-rc7/Documentation/dontdiff linux-2.6.18-rc7-vanilla/drivers/lcddisplay/cfag12864b.c linux-2.6.18-rc7/drivers/lcddisplay/cfag12864b.c
--- linux-2.6.18-rc7-vanilla/drivers/lcddisplay/cfag12864b.c 1970-01-01 01:00:00.000000000 +0100
+++ linux-2.6.18-rc7/drivers/lcddisplay/cfag12864b.c 2006-09-13 05:03:29.000000000 +0200
@@ -0,0 +1,558 @@
+/*
+ * Filename: cfag12864b.c
+ * Version: 0.1.0
+ * Description: cfag12864b LCD Display Driver
+ * License: GPL
+ * Depends: lcddisplay ks0108
+ *
+ * Author: Miguel Ojeda Sandonis <maxextreme@gmail.com>
+ * Date: 2006-09-12
+ */
+
+
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/fs.h>
+#include <linux/cdev.h>
+#include <linux/device.h>
+#include <linux/lcddisplay.h>
+#include <linux/ks0108.h>
+#include <linux/cfag12864b.h>
+#include <asm/uaccess.h>
+
+#define NAME "cfag12864b"
+#define PRINTK_PREFIX KERN_INFO NAME ": "
+
+
+
+/*
+ * Device
+ */
+
+static const unsigned int cfag12864b_firstminor = 0;
+static const unsigned int cfag12864b_ndevices = 1;
+static const char * cfag12864b_name = NAME;
+
+static int cfag12864b_major;
+static int cfag12864b_minor;
+static dev_t cfag12864b_device;
+struct cdev cfag12864b_chardevice;
+
+
+
+
+/*
+ * cfag12864b Commands
+ */
+
+#define bit(n) ((unsigned char)(1<<(n)))
+#define nobit(n) ((unsigned char)(~bit(n)))
+static const unsigned int cfag12864b_bits = 8;
+
+static const unsigned int cfag12864b_width = CFAG12864B_WIDTH;
+static const unsigned int cfag12864b_height = CFAG12864B_HEIGHT;
+static const unsigned int cfag12864b_matrixsize = CFAG12864B_MATRIXSIZE;
+static const unsigned int cfag12864b_controllers = CFAG12864B_CONTROLLERS;
+static const unsigned int cfag12864b_pages = CFAG12864B_PAGES;
+static const unsigned int cfag12864b_addresses = CFAG12864B_ADDRESSES;
+static const unsigned int cfag12864b_size = CFAG12864B_SIZE;
+
+static unsigned char cfag12864b_state = 0;
+
+static void cfag12864b_set(void)
+{
+ ks0108_writecontrol(cfag12864b_state);
+}
+
+static void cfag12864b_e(unsigned char state)
+{
+ if(state)
+ cfag12864b_state |= bit(0);
+ else
+ cfag12864b_state &= nobit(0);
+ cfag12864b_set();
+}
+
+static void cfag12864b_cs1(unsigned char state)
+{
+ if(state)
+ cfag12864b_state |= bit(2);
+ else
+ cfag12864b_state &= nobit(2);
+ cfag12864b_set();
+}
+
+static void cfag12864b_cs2(unsigned char state)
+{
+ if(state)
+ cfag12864b_state |= bit(1);
+ else
+ cfag12864b_state &= nobit(1);
+ cfag12864b_set();
+}
+
+static void cfag12864b_di(unsigned char state)
+{
+ if(state)
+ cfag12864b_state |= bit(3);
+ else
+ cfag12864b_state &= nobit(3);
+ cfag12864b_set();
+}
+
+static void cfag12864b_firstcontroller(unsigned char state)
+{
+ if(state)
+ cfag12864b_cs1(0);
+ else
+ cfag12864b_cs1(1);
+}
+
+static void cfag12864b_secondcontroller(unsigned char state)
+{
+ if(state)
+ cfag12864b_cs2(0);
+ else
+ cfag12864b_cs2(1);
+}
+
+static void cfag12864b_setcontrollers(unsigned char first, unsigned char second)
+{
+ cfag12864b_firstcontroller(first);
+ cfag12864b_secondcontroller(second);
+}
+
+static void cfag12864b_controller(unsigned char which)
+{
+ if(which==0)
+ cfag12864b_setcontrollers(1,0);
+ else if(which==1)
+ cfag12864b_setcontrollers(0,1);
+}
+
+static void cfag12864b_displaystate(unsigned char state)
+{
+ cfag12864b_di(0);
+ cfag12864b_e(1);
+ ks0108_displaystate(state);
+ cfag12864b_e(0);
+}
+
+static void cfag12864b_address(unsigned char address)
+{
+ cfag12864b_di(0);
+ cfag12864b_e(1);
+ ks0108_address(address);
+ cfag12864b_e(0);
+}
+
+static void cfag12864b_page(unsigned char page)
+{
+ cfag12864b_di(0);
+ cfag12864b_e(1);
+ ks0108_page(page);
+ cfag12864b_e(0);
+}
+
+static void cfag12864b_startline(unsigned char startline)
+{
+ cfag12864b_di(0);
+ cfag12864b_e(1);
+ ks0108_startline(startline);
+ cfag12864b_e(0);
+}
+
+static void cfag12864b_writebyte(unsigned char byte)
+{
+ cfag12864b_di(1);
+ cfag12864b_e(1);
+ ks0108_writedata(byte);
+ cfag12864b_e(0);
+}
+
+static void cfag12864b_nop(void)
+{
+ cfag12864b_startline(0);
+}
+
+
+
+/*
+ * Auxiliar
+ */
+
+static void normalizeoffset(unsigned int * offset)
+{
+ if(*offset>=cfag12864b_pages*cfag12864b_addresses)
+ *offset-=cfag12864b_pages*cfag12864b_addresses;
+}
+
+static unsigned char calcaddress(unsigned int offset)
+{
+ normalizeoffset(&offset);
+ return offset%cfag12864b_addresses;
+}
+
+static unsigned char calccontroller(unsigned int offset)
+{
+ if(offset<cfag12864b_pages*cfag12864b_addresses)
+ return 0;
+ return 1;
+}
+
+static unsigned char calcpage(unsigned int offset)
+{
+ normalizeoffset(&offset);
+ return offset/cfag12864b_addresses;
+}
+
+
+
+/*
+ * cfag12864b Exported Commands
+ */
+
+void cfag12864b_on(void)
+{
+ cfag12864b_setcontrollers(1,1);
+ cfag12864b_displaystate(1);
+}
+
+void cfag12864b_off(void)
+{
+ cfag12864b_setcontrollers(1,1);
+ cfag12864b_displaystate(0);
+}
+
+void cfag12864b_clear(void)
+{
+ unsigned char page,address;
+
+ cfag12864b_setcontrollers(1,1);
+ for(page=0; page<cfag12864b_pages; ++page) {
+ cfag12864b_page(page);
+ cfag12864b_address(0);
+ for(address=0; address<cfag12864b_addresses; ++address)
+ cfag12864b_writebyte(0);
+ }
+}
+
+void cfag12864b_write(
+ unsigned short offset,
+ unsigned char * buffer,
+ unsigned short count)
+{
+ unsigned short i;
+
+ /* Invalid values: They get updated at the first cycle */
+ unsigned char controller = 0xFF;
+ unsigned char page = 0xFF;
+ unsigned char address = 0xFF;
+
+ unsigned char tmpcontroller, tmppage, tmpaddress;
+
+ for(i=0; i<count; ++i, ++offset, ++address) {
+ tmpcontroller = calccontroller(offset);
+ tmppage = calcpage(offset);
+ tmpaddress = calcaddress(offset);
+
+ if(controller != tmpcontroller) {
+ controller = tmpcontroller;
+ cfag12864b_controller(controller);
+ cfag12864b_nop();
+ }
+ if(page != tmppage) {
+ page = tmppage;
+ cfag12864b_page(page);
+ cfag12864b_nop();
+ }
+
+ /*if(address != tmpaddress) {
+ address = tmpaddress;
+ cfag12864b_address(address);
+ cfag12864b_nop();
+ }*/
+
+ /*if(tmpcontroller == 0) {
+ if(address != tmpaddress) {
+ address = tmpaddress;
+ cfag12864b_address(address);
+ }
+ }
+ else {
+ cfag12864b_address(tmpaddress);
+ cfag12864b_nop();
+ }*/
+
+ /* Safe method, still quick */
+ cfag12864b_address(tmpaddress);
+ cfag12864b_nop();
+
+ /* Dummy */
+ cfag12864b_nop();
+
+ cfag12864b_writebyte(buffer[i]);
+ }
+}
+
+void cfag12864b_format(unsigned char * src)
+{
+ unsigned short controller,page,address,bit;
+ unsigned char * dest;
+
+ dest = kmalloc(sizeof(unsigned char)*cfag12864b_size,GFP_KERNEL);
+ if(dest == NULL) {
+ printk(PRINTK_PREFIX "format: ERROR: "
+ "can't alloc memory %i bytes\n",
+ sizeof(unsigned char)*cfag12864b_size);
+ return;
+ }
+
+ for(controller=0; controller<cfag12864b_controllers; ++controller)
+ for(page=0; page<cfag12864b_pages; ++page)
+ for(address=0; address<cfag12864b_addresses; ++address) {
+ dest[(controller*cfag12864b_pages+page)*cfag12864b_addresses+address]=0;
+ for(bit=0; bit<cfag12864b_bits; ++bit)
+ if(src[controller*cfag12864b_addresses+address+(page*cfag12864b_bits+bit)*cfag12864b_width])
+ dest[(controller*cfag12864b_pages+page)*cfag12864b_addresses+address]|=bit(bit);
+ }
+
+ cfag12864b_write(0,dest,cfag12864b_size);
+
+ kfree(dest);
+}
+
+EXPORT_SYMBOL_GPL(cfag12864b_on);
+EXPORT_SYMBOL_GPL(cfag12864b_off);
+EXPORT_SYMBOL_GPL(cfag12864b_clear);
+EXPORT_SYMBOL_GPL(cfag12864b_write);
+EXPORT_SYMBOL_GPL(cfag12864b_format);
+
+
+/*
+ * cfag12864b_fops
+ */
+
+static loff_t cfag12864b_fopseek(
+ struct file * filp,
+ loff_t offset,
+ int whence)
+{
+ loff_t new;
+
+ switch(whence) {
+ case 0: /* SEEK_SET */
+ new = offset;
+ break;
+ case 1: /* SEEK_CUR */
+ new = filp->f_pos + offset;
+ break;
+ case 2: /* SEEK_END */
+ new = cfag12864b_size + offset;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ if(new < 0)
+ return -EINVAL;
+ filp->f_pos = new;
+ return new;
+}
+
+
+static ssize_t cfag12864b_fopwrite(
+ struct file * filp,
+ const char __user * buffer,
+ size_t count,
+ loff_t * offset)
+{
+ int ret = -EINVAL;
+ int result;
+ char * tmpbuffer;
+
+ if(*offset>cfag12864b_size)
+ return 0;
+ if(*offset+count>cfag12864b_size)
+ count=cfag12864b_size-*offset;
+
+ tmpbuffer = kmalloc(count,GFP_KERNEL);
+ if(tmpbuffer == NULL) {
+ printk(PRINTK_PREFIX "FOP write: ERROR: "
+ "can't alloc memory %i bytes\n",count);
+ ret = -ENOMEM;
+ goto none;
+ }
+
+ result = copy_from_user(tmpbuffer, buffer, count);
+ if(result != 0) {
+ printk(PRINTK_PREFIX "FOP write: ERROR: "
+ "can't copy memory from user\n");
+ ret = -EFAULT;
+ goto bufferalloced;
+ }
+
+ cfag12864b_write(*offset, tmpbuffer, count);
+
+ *offset += count;
+ ret = count;
+
+bufferalloced:
+ kfree(tmpbuffer);
+
+none:
+ return ret;
+}
+
+static int cfag12864b_fopioctlformat(unsigned long arg)
+{
+ int result;
+ int ret = -ENOTTY;
+
+ unsigned char * tmpbuffer;
+
+ tmpbuffer = kmalloc(
+ sizeof(unsigned char)*cfag12864b_matrixsize,GFP_KERNEL);
+ if(tmpbuffer == NULL) {
+ printk(PRINTK_PREFIX "FOP ioctl: ERROR: "
+ "can't alloc memory %i bytes\n",
+ sizeof(unsigned char)*cfag12864b_matrixsize);
+ goto none;
+ }
+
+ result = copy_from_user(
+ tmpbuffer,
+ (void __user *)arg,
+ sizeof(unsigned char)*cfag12864b_matrixsize);
+ if(result != 0) {
+ printk(PRINTK_PREFIX "FOP ioctl: ERROR: "
+ "can't copy memory from user\n");
+ goto bufferalloced;
+ }
+
+ cfag12864b_format(tmpbuffer);
+
+ ret = 0;
+
+bufferalloced:
+ kfree(tmpbuffer);
+
+none:
+ return ret;
+}
+
+static int cfag12864b_fopioctl(
+ struct inode * inode,
+ struct file * filp,
+ unsigned int cmd,
+ unsigned long arg)
+{
+ if(_IOC_TYPE(cmd) != CFAG12864B_IOC_MAGIC)
+ return -ENOTTY;
+ if(_IOC_NR(cmd) > CFAG12864B_IOC_MAXNR)
+ return -ENOTTY;
+
+ switch(cmd) {
+ case CFAG12864B_IOCON:
+ cfag12864b_on();
+ break;
+ case CFAG12864B_IOCOFF:
+ cfag12864b_off();
+ break;
+ case CFAG12864B_IOCCLEAR:
+ cfag12864b_clear();
+ break;
+ case CFAG12864B_IOCFORMAT:
+ return cfag12864b_fopioctlformat(arg);
+ default:
+ return -ENOTTY;
+ }
+
+ return 0;
+}
+
+
+static struct file_operations cfag12864b_fops =
+{
+ .owner = THIS_MODULE,
+ .llseek = cfag12864b_fopseek,
+ .write = cfag12864b_fopwrite,
+ .ioctl = cfag12864b_fopioctl,
+};
+
+
+/*
+ * Module Init & Exit
+ */
+
+static int __init cfag12864b_init(void)
+{
+ int result;
+ int ret = -EINVAL;
+
+ result = alloc_chrdev_region(
+ &cfag12864b_device, cfag12864b_firstminor,
+ cfag12864b_ndevices, cfag12864b_name);
+ if(result < 0) {
+ printk(PRINTK_PREFIX "ERROR: "
+ "can't alloc the char device region\n");
+ ret = result;
+ goto none;
+ }
+
+ cfag12864b_major = MAJOR(cfag12864b_device);
+ cfag12864b_minor = cfag12864b_firstminor;
+ cfag12864b_device = MKDEV(cfag12864b_major,cfag12864b_minor);
+
+ cfag12864b_clear();
+ cfag12864b_on();
+
+ cdev_init(&cfag12864b_chardevice,&cfag12864b_fops);
+ cfag12864b_chardevice.owner = THIS_MODULE;
+ cfag12864b_chardevice.ops = &cfag12864b_fops;
+ result = cdev_add(
+ &cfag12864b_chardevice,
+ cfag12864b_device, cfag12864b_ndevices);
+ if(result < 0) {
+ printk(PRINTK_PREFIX "ERROR: "
+ "unable to add a new char device\n");
+ ret = result;
+ goto regionalloced;
+ }
+
+ class_device_create(
+ lcddisplay_class,NULL,
+ cfag12864b_device,
+ NULL,"cfag12864b%d",cfag12864b_minor);
+
+ printk(PRINTK_PREFIX "Inited\n");
+
+ return 0;
+
+regionalloced:
+ unregister_chrdev_region(cfag12864b_device, cfag12864b_ndevices);
+
+none:
+ return ret;
+}
+
+static void __exit cfag12864b_exit(void)
+{
+ cfag12864b_off();
+
+ class_device_destroy(lcddisplay_class,cfag12864b_device);
+ cdev_del(&cfag12864b_chardevice);
+ unregister_chrdev_region(cfag12864b_device, cfag12864b_ndevices);
+
+ printk(PRINTK_PREFIX "Exited\n");
+}
+
+module_init(cfag12864b_init);
+module_exit(cfag12864b_exit);
+
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Miguel Ojeda Sandonis <maxextreme@gmail.com>");
+MODULE_DESCRIPTION("cfag12864b");
+
diff -uprN -X linux-2.6.18-rc7/Documentation/dontdiff linux-2.6.18-rc7-vanilla/drivers/lcddisplay/Kconfig linux-2.6.18-rc7/drivers/lcddisplay/Kconfig
--- linux-2.6.18-rc7-vanilla/drivers/lcddisplay/Kconfig 1970-01-01 01:00:00.000000000 +0100
+++ linux-2.6.18-rc7/drivers/lcddisplay/Kconfig 2006-09-12 19:13:44.000000000 +0200
@@ -0,0 +1,61 @@
+#
+# For a description of the syntax of this configuration file,
+# see Documentation/kbuild/kconfig-language.txt.
+#
+# LCD Display drivers configuration.
+#
+
+menu "LCD Display support"
+
+config LCDDISPLAY
+ tristate "LCD Display support"
+ default n
+ ---help---
+ If you have a LCD display, say Y.
+
+ To compile this as a module, choose M here:
+ module will be called lcddisplay.
+
+ If unsure, say N.
+
+comment "Parallel port dependent:"
+
+config KS0108
+ tristate "KS0108 LCD Controller"
+ depends on LCDDISPLAY && PARPORT
+ default n
+ ---help---
+ If you have a LCD display controlled by one or more KS0108
+ controllers, say Y. You will need also another more specific
+ driver for your LCD.
+
+ Depends on Parallel Port support. If you say Y at
+ parport, you will be able to compile this as a module (M)
+ and built-in as well (Y). If you said M at parport,
+ you will be able only to compile this as a module (M).
+
+ To compile this as a module, choose M here:
+ module will be called ks0108.
+
+ If unsure, say N.
+
+config CFAG12864B
+ tristate "CFAG12864B LCD Display"
+ depends on KS0108
+ default n
+ ---help---
+ If you have a Crystalfontz 128x64 2-color LCD display,
+ cfag12864b Series, say Y. You also need the ks0108 LCD
+ Controller driver.
+
+ For help about how to wire your LCD to the parallel port,
+ check this image: http://www.skippari.net/lcd/sekalaista
+ /crystalfontz_cfag12864B-TMI-V.png
+
+ To compile this as a module, choose M here:
+ module will be called cfag12864b.
+
+ If unsure, say N.
+
+endmenu
+
diff -uprN -X linux-2.6.18-rc7/Documentation/dontdiff linux-2.6.18-rc7-vanilla/drivers/lcddisplay/ks0108.c linux-2.6.18-rc7/drivers/lcddisplay/ks0108.c
--- linux-2.6.18-rc7-vanilla/drivers/lcddisplay/ks0108.c 1970-01-01 01:00:00.000000000 +0100
+++ linux-2.6.18-rc7/drivers/lcddisplay/ks0108.c 2006-09-13 05:03:49.000000000 +0200
@@ -0,0 +1,175 @@
+/*
+ * Filename: ks0108.c
+ * Version: 0.1.0
+ * Description: ks0108 LCD Display Controller Driver
+ * License: GPL
+ * Depends: parport
+ *
+ * Author: Miguel Ojeda Sandonis <maxextreme@gmail.com>
+ * Date: 2006-09-12
+ */
+
+
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/fs.h>
+#include <linux/delay.h>
+#include <linux/parport.h>
+#include <linux/ks0108.h>
+#include <asm/io.h>
+#include <asm/uaccess.h>
+
+
+#define NAME "ks0108"
+#define PRINTK_PREFIX KERN_INFO NAME ": "
+
+
+
+/*
+ * Module Parameters
+ */
+
+static unsigned int ks0108_port = 0x378;
+module_param(ks0108_port,uint,S_IRUGO);
+
+
+
+/*
+ * Device
+ */
+
+static const char * ks0108_name = NAME;
+
+static struct parport * ks0108_parport;
+static struct pardevice * ks0108_pardevice;
+
+
+
+/*
+ * ks0108 Exported cmds
+ */
+
+#define bit(n) ((unsigned char)(1<<(n)))
+
+void ks0108_writedata(unsigned char byte)
+{
+ parport_write_data(ks0108_parport,byte);
+}
+
+void ks0108_writecontrol(unsigned char byte)
+{
+ const unsigned int ecycledelay = 2;
+ udelay(ecycledelay);
+ parport_write_control(ks0108_parport,byte^(bit(3)|bit(1)|bit(0)));
+}
+
+void ks0108_displaystate(unsigned char state)
+{
+ unsigned char cmd = bit(1) | bit(2) | bit(3) | bit(4) | bit(5);
+ if(state)
+ cmd |= bit(0);
+ ks0108_writedata(cmd);
+}
+
+void ks0108_startline(unsigned char startline)
+{
+ const unsigned char maxstartline = 63;
+ unsigned char cmd = bit(6) | bit(7);
+ if(startline>maxstartline)
+ startline=maxstartline;
+ cmd |= startline;
+ ks0108_writedata(cmd);
+}
+
+void ks0108_address(unsigned char address)
+{
+ const unsigned char maxaddress = 63;
+ unsigned char cmd = bit(6);
+ if(address>maxaddress)
+ address=maxaddress;
+ cmd |= address;
+ ks0108_writedata(cmd);
+}
+
+void ks0108_page(unsigned char page)
+{
+ const unsigned char maxpage = 7;
+ unsigned char cmd = bit(3) | bit(4) | bit(5) | bit(7);
+ if(page>maxpage)
+ page=maxpage;
+ cmd |= page;
+ ks0108_writedata(cmd);
+}
+
+
+EXPORT_SYMBOL_GPL(ks0108_writedata);
+EXPORT_SYMBOL_GPL(ks0108_writecontrol);
+EXPORT_SYMBOL_GPL(ks0108_displaystate);
+EXPORT_SYMBOL_GPL(ks0108_startline);
+EXPORT_SYMBOL_GPL(ks0108_address);
+EXPORT_SYMBOL_GPL(ks0108_page);
+
+
+
+
+/*
+ * Module Init & Exit
+ */
+
+static int __init ks0108_init(void)
+{
+ int result;
+ int ret = -EINVAL;
+
+ ks0108_parport = parport_find_base(ks0108_port);
+ if(ks0108_parport == NULL) {
+ printk(PRINTK_PREFIX "ERROR: "
+ "parport didn't find %i port\n",ks0108_port);
+ goto none;
+ }
+
+ ks0108_pardevice = parport_register_device(
+ ks0108_parport,ks0108_name,
+ NULL,NULL,NULL,
+ PARPORT_DEV_EXCL,NULL);
+ if(ks0108_pardevice == NULL) {
+ printk(PRINTK_PREFIX "ERROR: "
+ "parport didn't register new device\n");
+ goto none;
+ }
+
+ result = parport_claim(ks0108_pardevice);
+ if(result != 0) {
+ printk(PRINTK_PREFIX "ERROR: "
+ "can't claim %i parport, maybe in use\n",ks0108_port);
+ ret = result;
+ goto registered;
+ }
+
+ printk(PRINTK_PREFIX "Inited\n");
+ return 0;
+
+registered:
+ parport_unregister_device(ks0108_pardevice);
+
+none:
+ return ret;
+}
+
+static void __exit ks0108_exit(void)
+{
+ parport_release(ks0108_pardevice);
+ parport_unregister_device(ks0108_pardevice);
+
+ printk(PRINTK_PREFIX "Exited\n");
+}
+
+module_init(ks0108_init);
+module_exit(ks0108_exit);
+
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Miguel Ojeda Sandonis <maxextreme@gmail.com>");
+MODULE_DESCRIPTION("ks0108");
+
diff -uprN -X linux-2.6.18-rc7/Documentation/dontdiff linux-2.6.18-rc7-vanilla/drivers/lcddisplay/lcddisplay.c linux-2.6.18-rc7/drivers/lcddisplay/lcddisplay.c
--- linux-2.6.18-rc7-vanilla/drivers/lcddisplay/lcddisplay.c 1970-01-01 01:00:00.000000000 +0100
+++ linux-2.6.18-rc7/drivers/lcddisplay/lcddisplay.c 2006-09-13 05:04:36.000000000 +0200
@@ -0,0 +1,71 @@
+/*
+ * Filename: lcddisplay.c
+ * Version: 0.1.0
+ * Description: LCD Display Class
+ * License: GPL
+ * Depends: -
+ *
+ * Author: Miguel Ojeda Sandonis <maxextreme@gmail.com>
+ * Date: 2006-09-12
+ */
+
+
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/fs.h>
+#include <linux/device.h>
+#include <linux/lcddisplay.h>
+
+#define NAME "lcddisplay"
+#define PRINTK_PREFIX KERN_INFO NAME ": "
+
+static const char * lcddisplay_name = NAME;
+
+
+/*
+ * Exported Display Data
+ */
+
+struct class * lcddisplay_class;
+EXPORT_SYMBOL_GPL(lcddisplay_class);
+
+
+/*
+ * Module Init & Exit
+ */
+
+static int __init lcddisplay_init(void)
+{
+ int ret = -EINVAL;
+
+ lcddisplay_class = class_create(THIS_MODULE,lcddisplay_name);
+ if(IS_ERR(lcddisplay_class)) {
+ printk(PRINTK_PREFIX "ERROR: "
+ "can't create %s class\n",lcddisplay_name);
+ goto none;
+ }
+
+ printk(PRINTK_PREFIX "Inited\n");
+
+ return 0;
+
+none:
+ return ret;
+}
+
+static void __exit lcddisplay_exit(void)
+{
+ class_destroy(lcddisplay_class);
+
+ printk(PRINTK_PREFIX "Exited\n");
+}
+
+module_init(lcddisplay_init);
+module_exit(lcddisplay_exit);
+
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Miguel Ojeda Sandonis <maxextreme@gmail.com>");
+MODULE_DESCRIPTION("lcddisplay");
+
diff -uprN -X linux-2.6.18-rc7/Documentation/dontdiff linux-2.6.18-rc7-vanilla/drivers/lcddisplay/Makefile linux-2.6.18-rc7/drivers/lcddisplay/Makefile
--- linux-2.6.18-rc7-vanilla/drivers/lcddisplay/Makefile 1970-01-01 01:00:00.000000000 +0100
+++ linux-2.6.18-rc7/drivers/lcddisplay/Makefile 2006-09-12 19:01:04.000000000 +0200
@@ -0,0 +1,7 @@
+#
+# Makefile for the kernel LCD Display device drivers.
+#
+
+obj-$(CONFIG_LCDDISPLAY) += lcddisplay.o
+obj-$(CONFIG_KS0108) += ks0108.o
+obj-$(CONFIG_CFAG12864B) += cfag12864b.o
diff -uprN -X linux-2.6.18-rc7/Documentation/dontdiff linux-2.6.18-rc7-vanilla/drivers/Makefile linux-2.6.18-rc7/drivers/Makefile
--- linux-2.6.18-rc7-vanilla/drivers/Makefile 2006-09-13 14:01:46.000000000 +0200
+++ linux-2.6.18-rc7/drivers/Makefile 2006-09-13 14:04:48.000000000 +0200
@@ -76,3 +76,4 @@ obj-$(CONFIG_CRYPTO) += crypto/
obj-$(CONFIG_SUPERH) += sh/
obj-$(CONFIG_GENERIC_TIME) += clocksource/
obj-$(CONFIG_DMA_ENGINE) += dma/
+obj-$(CONFIG_LCDDISPLAY) += lcddisplay/
diff -uprN -X linux-2.6.18-rc7/Documentation/dontdiff linux-2.6.18-rc7-vanilla/include/linux/cfag12864b.h linux-2.6.18-rc7/include/linux/cfag12864b.h
--- linux-2.6.18-rc7-vanilla/include/linux/cfag12864b.h 1970-01-01 01:00:00.000000000 +0100
+++ linux-2.6.18-rc7/include/linux/cfag12864b.h 2006-09-12 19:07:44.000000000 +0200
@@ -0,0 +1,45 @@
+/*
+ * Filename: cfag12864b.h
+ * Version: 0.1.0
+ * Description: cfag12864b LCD Display Driver Header
+ * License: GPL
+ *
+ * Author: Miguel Ojeda Sandonis <maxextreme@gmail.com>
+ * Date: 2006-09-12
+ */
+
+#ifndef _CFAG12864B_H_
+#define _CFAG12864B_H_
+
+#include <linux/ioctl.h>
+
+#define CFAG12864B_WIDTH 128
+#define CFAG12864B_HEIGHT 64
+#define CFAG12864B_MATRIXSIZE CFAG12864B_WIDTH*CFAG12864B_HEIGHT
+
+#define CFAG12864B_CONTROLLERS 2
+#define CFAG12864B_PAGES 8
+#define CFAG12864B_ADDRESSES 64
+#define CFAG12864B_SIZE CFAG12864B_CONTROLLERS * \
+ CFAG12864B_PAGES * \
+ CFAG12864B_ADDRESSES
+
+#define CFAG12864B_IOC_MAGIC 0xFF
+#define CFAG12864B_IOC_MAXNR 0x03
+
+#define CFAG12864B_IOCOFF _IO(CFAG12864B_IOC_MAGIC,0)
+#define CFAG12864B_IOCON _IO(CFAG12864B_IOC_MAGIC,1)
+#define CFAG12864B_IOCCLEAR _IO(CFAG12864B_IOC_MAGIC,2)
+#define CFAG12864B_IOCFORMAT _IOW(CFAG12864B_IOC_MAGIC,3,void *)
+
+extern void cfag12864b_on(void);
+extern void cfag12864b_off(void);
+extern void cfag12864b_clear(void);
+extern void cfag12864b_write(
+ unsigned short offset,
+ unsigned char * buffer,
+ unsigned short count);
+extern void cfag12864b_format(unsigned char * src);
+
+#endif /* _CFAG12864B_H_ */
+
diff -uprN -X linux-2.6.18-rc7/Documentation/dontdiff linux-2.6.18-rc7-vanilla/include/linux/ks0108.h linux-2.6.18-rc7/include/linux/ks0108.h
--- linux-2.6.18-rc7-vanilla/include/linux/ks0108.h 1970-01-01 01:00:00.000000000 +0100
+++ linux-2.6.18-rc7/include/linux/ks0108.h 2006-09-12 19:07:25.000000000 +0200
@@ -0,0 +1,21 @@
+/*
+ * Filename: ks0108.h
+ * Version: 0.1.0
+ * Description: ks0108 LCD Display Controller Driver Header
+ * License: GPL
+ *
+ * Author: Miguel Ojeda Sandonis <maxextreme@gmail.com>
+ * Date: 2006-09-12
+ */
+
+#ifndef _KS0108_H_
+#define _KS0108_H_
+
+extern void ks0108_writedata(unsigned char byte);
+extern void ks0108_writecontrol(unsigned char byte);
+extern void ks0108_displaystate(unsigned char state);
+extern void ks0108_startline(unsigned char startline);
+extern void ks0108_address(unsigned char address);
+extern void ks0108_page(unsigned char page);
+
+#endif /* _KS0108_H_ */
diff -uprN -X linux-2.6.18-rc7/Documentation/dontdiff linux-2.6.18-rc7-vanilla/include/linux/lcddisplay.h linux-2.6.18-rc7/include/linux/lcddisplay.h
--- linux-2.6.18-rc7-vanilla/include/linux/lcddisplay.h 1970-01-01 01:00:00.000000000 +0100
+++ linux-2.6.18-rc7/include/linux/lcddisplay.h 2006-09-12 19:07:07.000000000 +0200
@@ -0,0 +1,19 @@
+/*
+ * Filename: lcddisplay.h
+ * Version: 0.1.0
+ * Description: Display Class Header
+ * License: GPL
+ *
+ * Author: Miguel Ojeda Sandonis <maxextreme@gmail.com>
+ * Date: 2006-09-12
+ */
+
+#ifndef _LCDDISPLAY_H_
+#define _LCDDISPLAY_H_
+
+#include <linux/device.h>
+
+extern struct class * lcddisplay_class;
+
+#endif /* _LCDDISPLAY_H_ */
+
diff -uprN -X linux-2.6.18-rc7/Documentation/dontdiff linux-2.6.18-rc7-vanilla/CREDITS linux-2.6.18-rc7/CREDITS
--- linux-2.6.18-rc7-vanilla/CREDITS 2006-09-13 14:01:33.000000000 +0200
+++ linux-2.6.18-rc7/CREDITS 2006-09-13 14:14:45.000000000 +0200
@@ -2535,6 +2535,14 @@ S: Subiaco, 6008
S: Perth, Western Australia
S: Australia

+N: Miguel Ojeda Sandonis
+E: maxextreme@gmail.com
+D: Author: LCD Display Drivers (ks0108, cfag12864b)
+D: Maintainer: LCD Display Drivers Tree (drivers/lcddisplay/*)
+S: C/ Mieses 20, 9-B
+S: Valladolid 47009
+S: Spain
+
N: Greg Page
E: gpage@sovereign.org
D: IPX development and support
diff -uprN -X linux-2.6.18-rc7/Documentation/dontdiff linux-2.6.18-rc7-vanilla/MAINTAINERS linux-2.6.18-rc7/MAINTAINERS
--- linux-2.6.18-rc7-vanilla/MAINTAINERS 2006-09-13 14:01:34.000000000 +0200
+++ linux-2.6.18-rc7/MAINTAINERS 2006-09-13 14:16:26.000000000 +0200
@@ -1707,6 +1707,11 @@ M: James.Bottomley@HansenPartnership.com
L: linux-scsi@vger.kernel.org
S: Maintained

+LCD DISPLAY DRIVERS
+P: Miguel Ojeda Sandonis
+M: maxextreme@gmail.com
+S: Maintained
+
LED SUBSYSTEM
P: Richard Purdie
M: rpurdie@rpsys.net
-
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