sed_drv.c

Linux kernel driver for Epson s1d13700 LCD controller.

#include <linux/init.h>
#include <linux/module.h>
#include <linux/interrupt.h>
#include <linux/ioport.h>
#include <linux/fs.h>
#include <asm/uaccess.h>
#include <asm/gpio.h>
#include <asm/io.h>
#include <asm/arch/at91sam926x_mc.h>
//#include <linux/smp_lock.h>
#include "def_unix_types.h"
#include "graph_ctl.h"
#include "font.h"
#include "sed_drv.h"
#include "core.h"
#include "logo.h"
#include <linux/delay.h>
//#include <linux/spinlock.h>
//#include <linux/tqueue.h>
BYTE *pRegAddr;//address of registers
BYTE *p;
BYTE *GRAPH_MEM_REGION;
DWORD cur_dir;//current dirrection of cursor
DWORD cur_pos=0;


// ######################################################################
// fuctions prototypes

int init_module(void);
void cleanup_module(void);

static int device_open(struct inode *, struct file *);
static int device_release(struct inode *, struct file *);
int device_ioctl (struct inode *inode, struct file *file, unsigned int ioctl_num, unsigned long ioctl_param);
static ssize_t device_read(struct file *, char *, size_t, loff_t *);
static ssize_t device_write(struct file *, const char *, size_t, loff_t *);
void SystemSet(void);
void Display(int on, BYTE FC);
void Scroll(int SAD10,int SAD20,int SAD30,int SAD40);
void CursorForm(BYTE CRX,BYTE CRY,BYTE CM);
int CursorDir(int dir);
void HScroll(void);
void Overlay(void);
void CGRAMAddress(void);
void WriteCursorAddress(DWORD addr);
DWORD ReadCursorAddress(void);
void LoadFont(void);
void InitLCD(void);
void CleanLCD(void);
void ShowLogo(void);
void pixel(int x, int y, BYTE c);
void line(int x, int y, int x2, int y2, BYTE c);
void dotline(int x, int y, int x2, int y2, BYTE c);
void circle(int xc, int yc, int r, BYTE c);
void hor_line(int x1,int x2, int y,BYTE c);// ПХЯСЕЛ ЦНПХГНМРЮКЭМСЧ КХМХЧ ЯКЕБЮ МЮОПЮБН => x2>x1
void vert_line(int x,int y1,int y2,BYTE c);//ПХЯСЕР БЕПРХЙХКЭМСЧ КХМХЧ ЯБЕПУС БМХГ => y2>y1
void vert_line_xor(int x,int y1,int y2);//ПХЯСЕР БЕПРХЙХКЭМСЧ КХМХЧ ЯБЕПУС БМХГ => y2>y1
void rect(int x1, int y1, int x2, int y2, BYTE c);
void fill_rect(int x1, int y1, int x2, int y2, BYTE c);
void fill_rect_gr(int x1, int y1, int x2, int y2, BYTE c);
void SetCursorP(int x, int y);
void GetCursorP(int *x, int *y);
void OutCharXY(char ch, int x, int y);
void OutChar(char ch);
void OutString(char* text);
void OutStringXY(char* text,int x,int y);


static struct file_operations fops = {
    .read    = device_read,
    .write   = device_write,
    .ioctl   = device_ioctl,
    .open    = device_open,
    .release = device_release
};







// ######################################################################
// Methods

/* Called when a process tries to open the device file */

static int device_open(struct inode *inode, struct file *file)
{
    printk("%s Device opened\n", DEVICE_NAME);

    return 0;
}

// ----------------------------------------------------------------------
// Called when a process closes the device file.

static int device_release(struct inode *inode, struct file *file)
{
    printk("%s device closed blalbalba\n", DEVICE_NAME);
    return 0;
}

// ----------------------------------------------------------------------
// Called when a process attempts to write to dev file: echo hi > /dev/u2dev

static ssize_t device_write(struct file *filp, const char *buffer, size_t length, loff_t *off)
{
	printk("This function is unsupported on device %s: \n", DEVICE_NAME);
    return 0;
}

// ----------------------------------------------------------------------
// Called when a process attempts to read from dev file: cat /dev/u2dev
static ssize_t device_read(struct file *filp, char *buffer, size_t length, loff_t *offset)
{
	printk("This function is unsupported on device %s: \n", DEVICE_NAME);
    return 0;
}

//*************************
// system set up
void SystemSet(void)
{
    BYTE bt;
//---------Setting REG[00h]----------------
	bt = 0x10;
	bt = bt | (BYTE)(M0 & 1);
	bt = bt | (BYTE)((M1 << 1) & 2);
	bt = bt | (BYTE)((M2 << 2) & 4);
	bt = bt | (BYTE)((WS << 3) & 8);
	bt = bt | (BYTE)((IV << 5) & 0x20);
     aS1DRegs[0].Value = bt;
     pRegAddr[aS1DRegs[0].Index] = bt;
     wmb();
//------------------------------------------
//---------Setting REG[01h]-----------------
	bt = (BYTE)(FX & 0xf) | (BYTE)((WF << 7) & 0x80);
	aS1DRegs[1].Value = bt;
	pRegAddr[aS1DRegs[1].Index] = bt;
	wmb();
//------------------------------------------
//---------Setting REG[02h]-----------------
	bt = (BYTE)(FY & 0xf);
	aS1DRegs[2].Value = bt;
	pRegAddr[aS1DRegs[2].Index] = bt;
	wmb();
//------------------------------------------
//---------Setting REG[03h]-----------------
	bt = (BYTE)CR;
	aS1DRegs[3].Value = bt;
	pRegAddr[aS1DRegs[3].Index] = bt;
	wmb();
//------------------------------------------
//---------Setting REG[04h]-----------------
	bt = (BYTE)TCR;
	aS1DRegs[4].Value = bt;
	pRegAddr[aS1DRegs[4].Index] = bt;
	wmb();
//------------------------------------------
//---------Setting REG[05h]-----------------
	bt = (BYTE)LF;
	aS1DRegs[5].Value = bt;
	pRegAddr[aS1DRegs[5].Index] = bt;
	wmb();
//------------------------------------------
//---------Setting REG[06h]-----------------
	bt = (BYTE)(AP & 0xff);
	aS1DRegs[6].Value = bt;
	pRegAddr[aS1DRegs[6].Index] = bt;
	wmb();
//------------------------------------------
//---------Setting REG[07h]-----------------
	bt = (BYTE)(AP >> 8);
	aS1DRegs[7].Value = bt;
	pRegAddr[aS1DRegs[7].Index] = bt;
	wmb();
//------------------------------------------
}

//*************************************
// function for control display
// 1- on; 2- off;
void Display(int on, BYTE FC)
{
  BYTE bt;
  bt = FC & 3;
  bt = bt | (BYTE)((FP1 << 2) & 0xc);
  bt = bt | (BYTE)((FP2 << 4) & 0x30);
  bt = bt | (BYTE)((FP3 << 6) & 0xc0);
  if (on==1)
  	{
	 aS1DRegs[9].Value = 1;
	 pRegAddr[aS1DRegs[9].Index] = 1;
	 wmb();
	}
  else
	{
	 aS1DRegs[9].Value = 0;
	 pRegAddr[aS1DRegs[9].Index] = 0;
	 wmb();
	}
  aS1DRegs[10].Value = bt;
  pRegAddr[aS1DRegs[10].Index] = bt;
  wmb();

}
// ----------------------------------------------------------------------
//*************************************************************************
//setting params for the screens, e.g. pushing screens addresses to registers
void Scroll(int SAD10,int SAD20,int SAD30,int SAD40)
{
  BYTE bt;
//---REG0Bh------------------
  bt = SAD10 & 0xff;
  aS1DRegs[11].Value = bt;
  pRegAddr[aS1DRegs[11].Index] = bt;
  wmb();
//---REG0Ch------------------
  bt = SAD10 >> 8;
  aS1DRegs[12].Value = bt;
  pRegAddr[aS1DRegs[12].Index] = bt;
  wmb();
//---REG0Dh------------------
  bt = SL1;
  aS1DRegs[13].Value = bt;
  pRegAddr[aS1DRegs[13].Index] = bt;
  wmb();
//---REG0Eh------------------
  bt = SAD20 & 0xff;
  aS1DRegs[14].Value = bt;
  pRegAddr[aS1DRegs[14].Index] = bt;
  wmb();
//---REG0Fh------------------
  bt = SAD20 >> 8;
  aS1DRegs[15].Value = bt;
  pRegAddr[aS1DRegs[15].Index] = bt;
  wmb();
//---REG10h------------------
  bt = SL2;
  aS1DRegs[16].Value = bt;
  pRegAddr[aS1DRegs[16].Index] = bt;
  wmb();

//---REG11h------------------
  bt = SAD30 & 0xff;
  aS1DRegs[17].Value = bt;
  pRegAddr[aS1DRegs[17].Index] = bt;
  wmb();

//---REG12h------------------
  bt = SAD30 >> 8;
  aS1DRegs[18].Value = bt;
  pRegAddr[aS1DRegs[18].Index] = bt;
  wmb();

//---REG13h------------------
  bt = SAD40 & 0xff;
  aS1DRegs[19].Value = bt;
  pRegAddr[aS1DRegs[19].Index] = bt;
  wmb();

//---REG14h------------------
  bt = SAD40 >> 8;
  aS1DRegs[20].Value = bt;
  pRegAddr[aS1DRegs[20].Index] = bt;
  wmb();
}


//-------------------------------------
// setting up the form of the cursor
// CRX - width in pixels from left side of symbol
// CRY - heigth in pixels from top corner of symbol
void CursorForm(BYTE CRX,BYTE CRY,BYTE CM)
{
  BYTE bt;
//---REG15h-------------------
  aS1DRegs[21].Value = CRX;
  pRegAddr[aS1DRegs[21].Index] = CRX;
  wmb();

//---REG16h-------------------
  bt = CRY & 0x0f;
  bt = bt | (BYTE)((CM << 7) & 0x80);
  aS1DRegs[22].Value = bt;
  pRegAddr[aS1DRegs[22].Index] = bt;
  wmb();
}

//********************************
// setting direction for movement of the cursor
int CursorDir(int dir)
{
  BYTE bt;
  DWORD old_dir;
  old_dir = cur_dir;
  cur_dir = dir & 3;
//---REG17h-------------------
  bt = 0x4c | (dir & 3);
  aS1DRegs[23].Value = bt;
  pRegAddr[aS1DRegs[23].Index] = bt;
  wmb();
  return old_dir;
}

//********************************
// horizontal scrolling
void HScroll(void)
{
//---REG[1Bh]-------------------
  BYTE bt;
  bt = DX & 7;
  aS1DRegs[27].Value = bt;
  pRegAddr[aS1DRegs[27].Index] = bt;
  wmb();

}

//********************************
// setting up overlaying
void Overlay(void)
{
  BYTE bt;
  bt = MX & 3;
  bt = bt | (BYTE)((DM1 << 2) & 4);
  bt = bt | (BYTE)((DM2 << 3) & 8);
  bt = bt | (BYTE)((OV << 4) & 0x10);
//---REG[18h]-------------------
  aS1DRegs[24].Value = bt;
  pRegAddr[aS1DRegs[24].Index] = bt;
  wmb();
}

//********************************
// start address for char generator
void CGRAMAddress(void)
{
  BYTE bt;
  bt = SAG & 0xff;
//---REG[19h]-------------------
  aS1DRegs[25].Value = bt;
  pRegAddr[aS1DRegs[25].Index] = bt;
  wmb();
#ifdef DEBUG_MSG
  printk("-----------%s SAG low byte = %d \n",DEVICE_NAME,bt);
#endif
  bt = SAG >> 8;
//---REG[1Ah]-------------------
  aS1DRegs[26].Value = bt;
  pRegAddr[aS1DRegs[26].Index] = bt;
  wmb();
#ifdef DEBUG_MSG
  printk("-----------%s SAG high byte = %d \n",DEVICE_NAME,bt);
#endif
}

//********************************
// writes cursor's address
void WriteCursorAddress(DWORD addr)
{
  BYTE bt;

  bt = addr & 0xff;
//---REG[1Ch]-------------------
  aS1DRegs[28].Value = bt;
  pRegAddr[aS1DRegs[28].Index] = bt;
  wmb();

  bt = addr >> 8;
//---REG[1Dh]-------------------
  aS1DRegs[29].Value = bt;
  pRegAddr[aS1DRegs[29].Index] = bt;
  wmb();
  cur_pos = addr;
}

//********************************
// reads cursor's address
DWORD ReadCursorAddress(void)
{
  DWORD addr;
  DWORD bt;
  bt = pRegAddr[REG001E_CSRR_P1];
  rmb();
  addr = bt;
  bt = pRegAddr[REG001F_CSRR_P2];
  rmb();
  addr = addr | (bt << 8);
  return addr;
}

//********************************
// loading font to memory
void LoadFont(void)
{
  BYTE *cg;
  int i,j;
  CGRAMAddress();
  cg = (BYTE*)chargen;
  for (i=0;i<256;i++)
	for (j=0;j<8;j++)
	{
	GRAPH_MEM_REGION[SAG+i*8+j] = chargen[i*8+j];