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Message-ID: <653402b90609111627q661cded8l757129311fbe92d4@mail.gmail.com>
Date: Tue, 12 Sep 2006 01:27:30 +0200
From: "Miguel Ojeda" <maxextreme@...il.com>
To: akpm@...l.org
Cc: linux-kernel@...r.kernel.org
Subject: [PATCH 2.6.17.13] display: Driver ks0108 and cfag12864b
Miguel Ojeda Sandonis
Adds support for additional "display" devices, like small LCD screens.
Adds support for the ks0108 LCD Controller.
Adds support for the cfag12864b LCD.
Signed-off-by: Miguel Ojeda Sandonis <maxextreme@...il.com>
---
diff -uprN -X linux-2.6.17.13-vanilla/Documentation/dontdiff
linux-2.6.17.13-vanilla/Documentation/drivers/display/cfag12864b
linux-2.6.17.13/Documentation/drivers/display/cfag12864b
--- linux-2.6.17.13-vanilla/Documentation/drivers/display/cfag12864b 1970-01-01
01:00:00.000000000 +0100
+++ linux-2.6.17.13/Documentation/drivers/display/cfag12864b 2006-09-12
00:10:43.000000000 +0200
@@ -0,0 +1,363 @@
+ ===============================
+ cfag12864b Driver Documentation
+ ===============================
+
+License: GPL
+Author & Maintainer: Miguel Ojeda Sandonis <maxextreme@...il.com>
+Date: 2006-09-10
+
+
+
+--------
+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
+
+
+If you compiled the device as a module, don't remember to
+update udev to get the new device node at /dev.
+
+
+---------
+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
+ * License: GPL
+ *
+ * Author: Miguel Ojeda Sandonis <maxextreme@...il.com>
+ * Date: 2006-09-10
+ */
+
+#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 file,
+convert it to a boolean [128*64] buffer and then use
+ioctl to display it on the screen.
+
+---
+#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);
+ for(i=0; i<BMPSize; ++i)
+ Buffer_BMP[i]=fgetc(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-2.6.17.13-vanilla/Documentation/dontdiff
linux-2.6.17.13-vanilla/Documentation/drivers/display/display
linux-2.6.17.13/Documentation/drivers/display/display
--- linux-2.6.17.13-vanilla/Documentation/drivers/display/display 1970-01-01
01:00:00.000000000 +0100
+++ linux-2.6.17.13/Documentation/drivers/display/display 2006-09-12
00:24:39.000000000 +0200
@@ -0,0 +1,37 @@
+ =============================
+ Display Drivers Documentation
+ =============================
+
+License: GPL
+Author & Maintainer: Miguel Ojeda Sandonis <maxextreme@...il.com>
+Date: 2006-09-10
+
+--------
+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-2.6.17.13-vanilla/Documentation/dontdiff
linux-2.6.17.13-vanilla/Documentation/ioctl-number.txt
linux-2.6.17.13/Documentation/ioctl-number.txt
--- linux-2.6.17.13-vanilla/Documentation/ioctl-number.txt 2006-09-09
05:23:25.000000000 +0200
+++ linux-2.6.17.13/Documentation/ioctl-number.txt 2006-09-12
00:36:48.000000000 +0200
@@ -190,3 +190,5 @@ Code Seq# Include File Comments
<mailto:aherrman@...ibm.com>
0xF3 00-3F video/sisfb.h sisfb (in development)
<mailto:thomas@...ischhofer.net>
+0xFF 00-1F cfag12864b LCD Display linux/cfag12864b.h
+ <mailto:maxextreme@...il.com>
diff -uprN -X linux-2.6.17.13-vanilla/Documentation/dontdiff
linux-2.6.17.13-vanilla/CREDITS linux-2.6.17.13/CREDITS
--- linux-2.6.17.13-vanilla/CREDITS 2006-09-09 05:23:25.000000000 +0200
+++ linux-2.6.17.13/CREDITS 2006-09-12 00:16:06.000000000 +0200
@@ -2534,6 +2534,14 @@ S: Subiaco, 6008
S: Perth, Western Australia
S: Australia
+N: Miguel Ojeda Sandonis
+E: maxextreme@...il.com
+D: Author: LCD Display Drivers (ks0108, cfag12864b)
+D: Maintainer: LCD Display Drivers Tree (drivers/display/*)
+S: C/ Mieses 20, 9-B
+S: Valladolid 47009
+S: Spain
+
N: Greg Page
E: gpage@...ereign.org
D: IPX development and support
diff -uprN -X linux-2.6.17.13-vanilla/Documentation/dontdiff
linux-2.6.17.13-vanilla/drivers/display/cfag12864b.c
linux-2.6.17.13/drivers/display/cfag12864b.c
--- linux-2.6.17.13-vanilla/drivers/display/cfag12864b.c 1970-01-01
01:00:00.000000000 +0100
+++ linux-2.6.17.13/drivers/display/cfag12864b.c 2006-09-11
23:48:59.000000000 +0200
@@ -0,0 +1,585 @@
+/*
+ * Filename: cfag12864b.c
+ * Version: 0.1.0
+ * Description: cfag12864b LCD Display Driver
+ * License: GPL
+ * Depends: display ks0108
+ *
+ * Author: Miguel Ojeda Sandonis <maxextreme@...il.com>
+ * Date: 2006-09-10
+ */
+
+
+#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/display.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 FirstMinor = 0;
+static const unsigned int nDevices = 1;
+static const char * Name = NAME;
+
+static int Major;
+static dev_t FirstDevice;
+
+struct cfag12864b
+{
+ int Minor;
+ dev_t Device;
+ struct cdev CharDevice;
+};
+
+static struct cfag12864b * Devices;
+
+
+
+//
+// cfag12864b Commands
+//
+
+#define Bit(n) ((unsigned char)(1<<(n)))
+#define NoBit(n) ((unsigned char)(~Bit(n)))
+static const unsigned int Bits = 8;
+
+static const unsigned int Width = CFAG12864B_WIDTH;
+static const unsigned int Height = CFAG12864B_HEIGHT;
+static const unsigned int MatrixSize = CFAG12864B_MATRIXSIZE;
+static const unsigned int Controllers = CFAG12864B_CONTROLLERS;
+static const unsigned int Pages = CFAG12864B_PAGES;
+static const unsigned int Addresses = CFAG12864B_ADDRESSES;
+static const unsigned int Size = CFAG12864B_SIZE;
+
+static unsigned char State = 0;
+
+void cfag12864b_Set(void)
+{
+ ks0108_WriteControl(State ^ (Bit(3) | Bit(1) | Bit(0)) );
+}
+
+void cfag12864b_E(unsigned char _State)
+{
+ if(_State)
+ State |= Bit(0);
+ else
+ State &= NoBit(0);
+ cfag12864b_Set();
+}
+
+void cfag12864b_CS1(unsigned char _State)
+{
+ if(_State)
+ State |= Bit(2);
+ else
+ State &= NoBit(2);
+ cfag12864b_Set();
+}
+
+void cfag12864b_CS2(unsigned char _State)
+{
+ if(_State)
+ State |= Bit(1);
+ else
+ State &= NoBit(1);
+ cfag12864b_Set();
+}
+
+void cfag12864b_DI(unsigned char _State)
+{
+ if(_State)
+ State |= Bit(3);
+ else
+ State &= NoBit(3);
+ cfag12864b_Set();
+}
+
+void cfag12864b_FirstController(unsigned char _State)
+{
+ if(_State)
+ cfag12864b_CS1(0);
+ else
+ cfag12864b_CS1(1);
+}
+
+void cfag12864b_SecondController(unsigned char _State)
+{
+ if(_State)
+ cfag12864b_CS2(0);
+ else
+ cfag12864b_CS2(1);
+}
+
+void cfag12864b_Controllers(unsigned char _First, unsigned char _Second)
+{
+ cfag12864b_FirstController(_First);
+ cfag12864b_SecondController(_Second);
+}
+
+void cfag12864b_Controller(unsigned char _Which)
+{
+ if(_Which==0)
+ cfag12864b_Controllers(1,0);
+ else if(_Which==1)
+ cfag12864b_Controllers(0,1);
+}
+
+void cfag12864b_DisplayState(unsigned char _State)
+{
+ cfag12864b_DI(0);
+ cfag12864b_E(1);
+ ks0108_DisplayState(_State);
+ cfag12864b_E(0);
+}
+
+void cfag12864b_Address(unsigned char _Address)
+{
+ cfag12864b_DI(0);
+ cfag12864b_E(1);
+ ks0108_Address(_Address);
+ cfag12864b_E(0);
+}
+
+void cfag12864b_Page(unsigned char _Page)
+{
+ cfag12864b_DI(0);
+ cfag12864b_E(1);
+ ks0108_Page(_Page);
+ cfag12864b_E(0);
+}
+
+void cfag12864b_StartLine(unsigned char _StartLine)
+{
+ cfag12864b_DI(0);
+ cfag12864b_E(1);
+ ks0108_StartLine(_StartLine);
+ cfag12864b_E(0);
+}
+
+void cfag12864b_WriteByte(unsigned char _Byte)
+{
+ cfag12864b_DI(1);
+ cfag12864b_E(1);
+ ks0108_WriteData(_Byte);
+ cfag12864b_E(0);
+}
+
+void cfag12864b_NOP(void)
+{
+ cfag12864b_StartLine(0);
+}
+
+
+
+//
+// Auxiliar
+//
+
+void NormalizeOffset(unsigned int * _Offset)
+{
+ if(*_Offset>=Pages*Addresses)
+ *_Offset-=Pages*Addresses;
+}
+
+unsigned char GetAddress(unsigned int _Offset)
+{
+ NormalizeOffset(&_Offset);
+ return _Offset%Addresses;
+}
+
+unsigned char GetController(unsigned int _Offset)
+{
+ if(_Offset<Pages*Addresses)
+ return 0;
+ return 1;
+}
+
+unsigned char GetPage(unsigned int _Offset)
+{
+ NormalizeOffset(&_Offset);
+ return _Offset/Addresses;
+}
+
+
+
+//
+// cfag12864b Exported Commands
+//
+
+void cfag12864b_On(void)
+{
+ cfag12864b_Controllers(1,1);
+ cfag12864b_DisplayState(1);
+}
+
+void cfag12864b_Off(void)
+{
+ cfag12864b_Controllers(1,1);
+ cfag12864b_DisplayState(0);
+}
+
+void cfag12864b_Clear(void)
+{
+ unsigned char Page,Address;
+
+ cfag12864b_Controllers(1,1);
+ for(Page=0; Page<Pages; ++Page) {
+ cfag12864b_Page(Page);
+ cfag12864b_Address(0);
+ for(Address=0; Address<Addresses; ++Address)
+ cfag12864b_WriteByte(0x00);
+ }
+}
+
+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 = GetController(_Offset);
+ tmpPage = GetPage(_Offset);
+ tmpAddress = GetAddress(_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 = kmalloc(sizeof(unsigned char)*Size,GFP_KERNEL);
+
+ if(Dest == NULL) {
+ printk(PRINTK_PREFIX "Format: ERROR: "
+ "kmalloc\n");
+ return;
+ }
+
+ for(Controller=0; Controller<Controllers; ++Controller)
+ for(Page=0; Page<Pages; ++Page)
+ for(Address=0; Address<Addresses; ++Address) {
+ Dest[(Controller*Pages+Page)*Addresses+Address]=0;
+ for(Bit=0; Bit<Bits; ++Bit)
+ if(_Src[Controller*Addresses+Address+(Page*Bits+Bit)*Width])
+ Dest[(Controller*Pages+Page)*Addresses+Address]|=Bit(Bit);
+ }
+
+ cfag12864b_Write(0,Dest,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);
+
+
+//
+// Fops
+//
+
+int Open(
+ struct inode * _Inode,
+ struct file * _File)
+{
+ _File->private_data = container_of(_Inode->i_cdev, struct
cfag12864b, CharDevice);
+
+ return 0;
+}
+
+loff_t Seek(
+ struct file * _File,
+ loff_t _Offset,
+ int _Whence)
+{
+ loff_t New;
+
+ switch(_Whence) {
+ case 0: // SEEK_SET
+ New = _Offset;
+ break;
+ case 1: // SEEK_CUR
+ New = _File->f_pos + _Offset;
+ break;
+ case 2: // SEEK_END
+ New = Size + _Offset;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ if(New < 0)
+ return -EINVAL;
+ _File->f_pos = New;
+ return New;
+}
+
+
+ssize_t Write(
+ struct file * _File,
+ const char __user * _Buffer,
+ size_t _Count,
+ loff_t * _Offset)
+{
+ int Result;
+ char * Buffer;
+
+ if(*_Offset>Size)
+ return 0;
+ if(*_Offset+_Count>Size)
+ _Count=Size-*_Offset;
+
+ Buffer = kmalloc(_Count,GFP_KERNEL);
+ if(Buffer == NULL) {
+ printk(PRINTK_PREFIX "FOP Write: ERROR: "
+ "kmalloc\n");
+ return -ENOMEM;
+ }
+
+ Result = copy_from_user(Buffer, _Buffer, _Count);
+ if(Result != 0) {
+ printk(PRINTK_PREFIX "FOP Write: ERROR: "
+ "copy_from_user\n");
+ Result = -EFAULT;
+ goto out;
+ }
+
+ cfag12864b_Write(*_Offset, Buffer, _Count);
+
+ *_Offset += _Count;
+ Result = _Count;
+
+out:
+ kfree(Buffer);
+ return Result;
+}
+
+int IOCtl_Format(unsigned long _Arg)
+{
+ int Result,Return = -ENOTTY;
+
+ unsigned char * IOCFormatSrc;
+
+ // Alloc src buffer
+ IOCFormatSrc = kmalloc(sizeof(unsigned char)*Width*Height,GFP_KERNEL);
+ if(IOCFormatSrc == NULL) {
+ printk(PRINTK_PREFIX "FOP IOCtl: ERROR: "
+ "IOC FormatWrite: "
+ "kmalloc\n");
+ goto out;
+ }
+
+ // Copy src buffer from user
+ Result = copy_from_user(
+ IOCFormatSrc,
+ (void __user *)_Arg,
+ sizeof(unsigned char)*Width*Height);
+ if(Result != 0) {
+ printk(PRINTK_PREFIX "FOP IOCtl: ERROR: "
+ "IOC FormatWrite: "
+ "copy_from_user(IOCFormatSrc,...\n");
+ goto allocsrc;
+ }
+
+ cfag12864b_Format(IOCFormatSrc);
+
+ Return = 0;
+
+allocsrc:
+ kfree(IOCFormatSrc);
+out:
+ return Return;
+}
+
+int IOCtl(
+ struct inode * _Inode,
+ struct file * _File,
+ 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 IOCtl_Format(_Arg);
+ default:
+ return -ENOTTY;
+ }
+
+ return 0;
+}
+
+
+
+struct file_operations Fops =
+{
+ .owner = THIS_MODULE,
+ .llseek = Seek,
+ .write = Write,
+ .ioctl = IOCtl,
+ .open = Open,
+};
+
+
+
+
+
+
+
+
+
+//
+// Module Init & Exit
+//
+
+int cfag12864b_init(void)
+{
+ unsigned int i;
+ int Result;
+
+ printk(PRINTK_PREFIX "Init... ");
+
+ Result = alloc_chrdev_region(&FirstDevice, FirstMinor, nDevices, Name);
+ if(Result < 0) {
+ printk("ERROR - alloc_chrdev_region\n");
+ return Result;
+ }
+ Major = MAJOR(FirstDevice);
+
+ Devices = kmalloc(nDevices * sizeof(struct cfag12864b), GFP_KERNEL);
+ if(Devices == NULL) {
+ printk("ERROR - kmalloc\n");
+ return -ENOMEM;
+ }
+ memset(Devices, 0, nDevices * sizeof(struct cfag12864b));
+
+ for(i=0; i<nDevices; ++i) {
+ Devices[i].Minor = FirstMinor+i;
+ Devices[i].Device = MKDEV(Major,Devices[i].Minor);
+
+ cdev_init(&(Devices[i].CharDevice), &Fops);
+ Devices[i].CharDevice.owner = THIS_MODULE;
+ Devices[i].CharDevice.ops = &Fops;
+ Result = cdev_add(&(Devices[i].CharDevice),
+ Devices[i].Device, 1);
+ if(Result < 0) {
+ printk("ERROR - cdev_add\n");
+ kfree(Devices);
+ return Result;
+ }
+
+ class_device_create(
+ display_class,NULL,MKDEV(Major,Devices[i].Minor),
+ NULL,"cfag12864b%d",Devices[i].Minor);
+ }
+
+
+ cfag12864b_Clear();
+ cfag12864b_On();
+
+ printk("Done\n");
+
+ return 0;
+}
+
+void cfag12864b_exit(void)
+{
+ unsigned int i;
+
+ printk(PRINTK_PREFIX "Exit... ");
+
+ cfag12864b_Off();
+
+ if(Devices != NULL) {
+ for(i=0; i<nDevices; ++i) {
+ class_device_destroy(display_class,MKDEV(Major,Devices[i].Minor));
+ cdev_del(&(Devices[i].CharDevice));
+ }
+ kfree(Devices);
+ }
+
+ unregister_chrdev_region(FirstDevice, nDevices);
+
+ printk("Done\n");
+}
+
+module_init(cfag12864b_init);
+module_exit(cfag12864b_exit);
+
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Miguel Ojeda Sandonis <maxextreme@...il.com>");
+MODULE_DESCRIPTION("cfag12864b");
+
diff -uprN -X linux-2.6.17.13-vanilla/Documentation/dontdiff
linux-2.6.17.13-vanilla/drivers/display/display.c
linux-2.6.17.13/drivers/display/display.c
--- linux-2.6.17.13-vanilla/drivers/display/display.c 1970-01-01
01:00:00.000000000 +0100
+++ linux-2.6.17.13/drivers/display/display.c 2006-09-11
23:53:22.000000000 +0200
@@ -0,0 +1,60 @@
+/*
+ * Filename: display.c
+ * Version: 0.1.0
+ * Description: Display Class
+ * License: GPL
+ * Depends: -
+ *
+ * Author: Miguel Ojeda Sandonis <maxextreme@...il.com>
+ * Date: 2006-09-10
+ */
+
+
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/fs.h>
+#include <linux/device.h>
+#include <linux/display.h>
+
+#define NAME "display"
+#define PRINTK_PREFIX KERN_INFO NAME ": "
+
+static char * Name = NAME;
+
+//
+// Exported Display Data
+//
+
+struct class * display_class;
+EXPORT_SYMBOL_GPL(display_class);
+
+
+//
+// Module Init & Exit
+//
+
+int display_init(void)
+{
+ display_class = class_create(THIS_MODULE,Name);
+ if(IS_ERR(display_class)) {
+ printk(PRINTK_PREFIX "ERROR: class_simple_create\n");
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+void display_exit(void)
+{
+ class_destroy(display_class);
+}
+
+module_init(display_init);
+module_exit(display_exit);
+
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Miguel Ojeda Sandonis <maxextreme@...il.com>");
+MODULE_DESCRIPTION("display");
+
diff -uprN -X linux-2.6.17.13-vanilla/Documentation/dontdiff
linux-2.6.17.13-vanilla/drivers/display/Kconfig
linux-2.6.17.13/drivers/display/Kconfig
--- linux-2.6.17.13-vanilla/drivers/display/Kconfig 1970-01-01
01:00:00.000000000 +0100
+++ linux-2.6.17.13/drivers/display/Kconfig 2006-09-12 00:04:14.000000000 +0200
@@ -0,0 +1,61 @@
+#
+# For a description of the syntax of this configuration file,
+# see Documentation/kbuild/kconfig-language.txt.
+#
+# Display drivers configuration.
+#
+
+menu "Display support"
+
+config DISPLAY
+ tristate "Display support"
+ default n
+ ---help---
+ If you have an extra display, like a small LCD screen, say Y.
+
+ To compile this as a module, choose M here:
+ module will be called display.
+
+ If unsure, say N.
+
+comment "Parallel port dependent:"
+
+config KS0108
+ tristate "KS0108 LCD Controller"
+ depends on DISPLAY && 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-2.6.17.13-vanilla/Documentation/dontdiff
linux-2.6.17.13-vanilla/drivers/display/ks0108.c
linux-2.6.17.13/drivers/display/ks0108.c
--- linux-2.6.17.13-vanilla/drivers/display/ks0108.c 1970-01-01
01:00:00.000000000 +0100
+++ linux-2.6.17.13/drivers/display/ks0108.c 2006-09-11 23:49:15.000000000 +0200
@@ -0,0 +1,177 @@
+/*
+ * Filename: ks0108.c
+ * Version: 0.1.0
+ * Description: ks0108 LCD Display Controller Driver
+ * License: GPL
+ * Depends: parport
+ *
+ * Author: Miguel Ojeda Sandonis <maxextreme@...il.com>
+ * Date: 2006-09-10
+ */
+
+
+#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
+//
+
+static unsigned int Port = 0x378;
+module_param(Port,uint,S_IRUGO);
+
+
+
+//
+// Device
+//
+
+static const char * Name = NAME;
+
+static struct parport * Parport;
+static struct pardevice * Pardevice;
+
+
+
+//
+// ks0108 Exported Commands
+//
+
+#define Bit(n) ((unsigned char)(1<<(n)))
+
+void ks0108_WriteData(unsigned char _Byte)
+{
+ parport_write_data(Parport,_Byte);
+}
+
+void ks0108_WriteControl(unsigned char _Byte)
+{
+ const unsigned int ECycleDelay = 1;
+ udelay(ECycleDelay);
+ parport_write_control(Parport,_Byte);
+}
+
+void ks0108_DisplayState(unsigned char _State)
+{
+ unsigned char Command = Bit(1) | Bit(2) | Bit(3) | Bit(4) | Bit(5);
+ if(_State)
+ Command |= Bit(0);
+ ks0108_WriteData(Command);
+}
+
+void ks0108_StartLine(unsigned char _StartLine)
+{
+ const unsigned char MaxStartLine = 63;
+ unsigned char Command = Bit(6) | Bit(7);
+ if(_StartLine>MaxStartLine)
+ _StartLine=MaxStartLine;
+ Command |= _StartLine;
+ ks0108_WriteData(Command);
+}
+
+void ks0108_Address(unsigned char _Address)
+{
+ const unsigned char MaxAddress = 63;
+ unsigned char Command = Bit(6);
+ if(_Address>MaxAddress)
+ _Address=MaxAddress;
+ Command |= _Address;
+ ks0108_WriteData(Command);
+}
+
+void ks0108_Page(unsigned char _Page)
+{
+ const unsigned char MaxPage = 7;
+ unsigned char Command = Bit(3) | Bit(4) | Bit(5) | Bit(7);
+ if(_Page>MaxPage)
+ _Page=MaxPage;
+ Command |= _Page;
+ ks0108_WriteData(Command);
+}
+
+
+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
+//
+
+int ks0108_init(void)
+{
+ int Return = -EINVAL;
+
+ printk(PRINTK_PREFIX "Init... ");
+
+ Parport = parport_find_base(Port);
+ if(Parport == NULL) {
+ printk("ERROR - parport_find_base\n");
+ Return = -EFAULT;
+ goto none;
+ }
+
+ Pardevice = parport_register_device(
+ Parport,Name,
+ NULL,NULL,NULL,
+ PARPORT_DEV_EXCL,NULL);
+ if(Pardevice == NULL) {
+ printk("ERROR: parport_register_device\n");
+ Return = -EFAULT;
+ goto none;
+ }
+
+ if(parport_claim(Pardevice) != 0) {
+ printk("ERROR: parport_claim\n");
+ Return = -EFAULT;
+ goto registered;
+ }
+
+ printk("Done\n");
+ return 0;
+
+registered:
+ parport_unregister_device(Pardevice);
+
+none:
+ return Return;
+}
+
+void ks0108_exit(void)
+{
+ printk(PRINTK_PREFIX "Exit... ");
+
+ parport_release(Pardevice);
+
+ parport_unregister_device(Pardevice);
+
+ printk("Done\n");
+}
+
+module_init(ks0108_init);
+module_exit(ks0108_exit);
+
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Miguel Ojeda Sandonis <maxextreme@...il.com>");
+MODULE_DESCRIPTION("ks0108");
+
diff -uprN -X linux-2.6.17.13-vanilla/Documentation/dontdiff
linux-2.6.17.13-vanilla/drivers/display/Makefile
linux-2.6.17.13/drivers/display/Makefile
--- linux-2.6.17.13-vanilla/drivers/display/Makefile 1970-01-01
01:00:00.000000000 +0100
+++ linux-2.6.17.13/drivers/display/Makefile 2006-09-11 18:00:05.000000000 +0200
@@ -0,0 +1,7 @@
+#
+# Makefile for the kernel Display device drivers.
+#
+
+obj-$(CONFIG_DISPLAY) += display.o
+obj-$(CONFIG_KS0108) += ks0108.o
+obj-$(CONFIG_CFAG12864B) += cfag12864b.o
diff -uprN -X linux-2.6.17.13-vanilla/Documentation/dontdiff
linux-2.6.17.13-vanilla/drivers/Kconfig
linux-2.6.17.13/drivers/Kconfig
--- linux-2.6.17.13-vanilla/drivers/Kconfig 2006-09-09 05:23:25.000000000 +0200
+++ linux-2.6.17.13/drivers/Kconfig 2006-09-11 19:04:53.000000000 +0200
@@ -72,4 +72,8 @@ source "drivers/edac/Kconfig"
source "drivers/rtc/Kconfig"
+# parport before display - some displays depend on it.
+
+source "drivers/display/Kconfig"
+
endmenu
diff -uprN -X linux-2.6.17.13-vanilla/Documentation/dontdiff
linux-2.6.17.13-vanilla/drivers/Makefile
linux-2.6.17.13/drivers/Makefile
--- linux-2.6.17.13-vanilla/drivers/Makefile 2006-09-09 05:23:25.000000000 +0200
+++ linux-2.6.17.13/drivers/Makefile 2006-09-11 19:15:50.000000000 +0200
@@ -74,3 +74,4 @@ obj-$(CONFIG_SGI_SN) += sn/
obj-y += firmware/
obj-$(CONFIG_CRYPTO) += crypto/
obj-$(CONFIG_SUPERH) += sh/
+obj-$(CONFIG_DISPLAY) += display/
diff -uprN -X linux-2.6.17.13-vanilla/Documentation/dontdiff
linux-2.6.17.13-vanilla/include/linux/cfag12864b.h
linux-2.6.17.13/include/linux/cfag12864b.h
--- linux-2.6.17.13-vanilla/include/linux/cfag12864b.h 1970-01-01
01:00:00.000000000 +0100
+++ linux-2.6.17.13/include/linux/cfag12864b.h 2006-09-11
17:32:19.000000000 +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@...il.com>
+ * Date: 2006-09-10
+ */
+
+#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-2.6.17.13-vanilla/Documentation/dontdiff
linux-2.6.17.13-vanilla/include/linux/display.h
linux-2.6.17.13/include/linux/display.h
--- linux-2.6.17.13-vanilla/include/linux/display.h 1970-01-01
01:00:00.000000000 +0100
+++ linux-2.6.17.13/include/linux/display.h 2006-09-11 19:25:44.000000000 +0200
@@ -0,0 +1,19 @@
+/*
+ * Filename: display.h
+ * Version: 0.1.0
+ * Description: Display Class Header
+ * License: GPL
+ *
+ * Author: Miguel Ojeda Sandonis <maxextreme@...il.com>
+ * Date: 2006-09-10
+ */
+
+#ifndef _DISPLAY_H_
+#define _DISPLAY_H_
+
+#include <linux/device.h>
+
+extern struct class * display_class;
+
+#endif // _DISPLAY_H_
+
diff -uprN -X linux-2.6.17.13-vanilla/Documentation/dontdiff
linux-2.6.17.13-vanilla/include/linux/ks0108.h
linux-2.6.17.13/include/linux/ks0108.h
--- linux-2.6.17.13-vanilla/include/linux/ks0108.h 1970-01-01
01:00:00.000000000 +0100
+++ linux-2.6.17.13/include/linux/ks0108.h 2006-09-11 23:27:26.000000000 +0200
@@ -0,0 +1,22 @@
+/*
+ * Filename: ks0108.h
+ * Version: 0.1.0
+ * Description: ks0108 LCD Display Controller Driver Header
+ * License: GPL
+ *
+ * Author: Miguel Ojeda Sandonis <maxextreme@...il.com>
+ * Date: 2006-09-10
+ */
+
+#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-2.6.17.13-vanilla/Documentation/dontdiff
linux-2.6.17.13-vanilla/MAINTAINERS linux-2.6.17.13/MAINTAINERS
--- linux-2.6.17.13-vanilla/MAINTAINERS 2006-09-09 05:23:25.000000000 +0200
+++ linux-2.6.17.13/MAINTAINERS 2006-09-12 00:17:51.000000000 +0200
@@ -1640,6 +1640,11 @@ M: James.Bottomley@...senPartnership.com
L: linux-scsi@...r.kernel.org
S: Maintained
+DISPLAY DRIVERS
+P: Miguel Ojeda Sandonis
+M: maxextreme@...il.com
+S: Maintained
+
LED SUBSYSTEM
P: Richard Purdie
M: rpurdie@...ys.net
-
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