static int cobalt_lcdfb_cursor(struct fb_info *info, struct fb_cursor *cursor)
{
u32 x, y;
int retval;
switch (cursor->set) {
case FB_CUR_SETPOS:
x = cursor->image.dx;
y = cursor->image.dy;
if (x >= LCD_XRES_MAX || y >= LCD_YRES_MAX)
return -EINVAL;
retval = lcd_busy_wait(info);
if (retval < 0)
return retval;
lcd_write_control(info,
LCD_TEXT_POS(info->fix.line_length * y + x));
break;
default:
return -EINVAL;
}
retval = lcd_busy_wait(info);
if (retval < 0)
return retval;
if (cursor->enable)
lcd_write_control(info, LCD_CURSOR_ON);
else
lcd_write_control(info, LCD_CURSOR_OFF);
return 0;
}
static ssize_t cobalt_lcdfb_write(struct fb_info *info, const char __user *buf,
size_t count, loff_t *ppos)
{
char dst[LCD_CHARS_MAX];
unsigned long pos;
int len, retval = 0;
pos = *ppos;
if (pos >= LCD_CHARS_MAX || count == 0)
return 0;
if (count > LCD_CHARS_MAX)
count = LCD_CHARS_MAX;
if (pos + count > LCD_CHARS_MAX)
count = LCD_CHARS_MAX - pos;
if (copy_from_user(dst, buf, count))
return -EFAULT;
for (len = 0; len < count; len++) {
retval = lcd_busy_wait(info);
if (retval < 0)
break;
lcd_write_control(info, LCD_TEXT_POS(pos));
retval = lcd_busy_wait(info);
if (retval < 0)
break;
lcd_write_data(info, dst[len]);
if (pos == 0x0f)
pos = 0x40;
else
pos++;
}
if (retval < 0 && signal_pending(current))
return -ERESTARTSYS;
*ppos += len;
return len;
}
//------------------------------------------------------------------------------------
// lcd_cmd
//------------------------------------------------------------------------------------
//
// write a command to the LCD controller
//
void lcd_cmd(char cmd)
{
char SFRPAGE_SAVE;
SFRPAGE_SAVE = SFRPAGE; // Save Current SFR page
SFRPAGE = CONFIG_PAGE;
lcd_busy_wait();
LCD_CTRL_PORT = LCD_CTRL_PORT & ~RS_MASK; // RS = 0
LCD_CTRL_PORT = LCD_CTRL_PORT & ~RW_MASK; // RW = 0
LCD_DAT_PORT = cmd;
small_delay(1); //RPK
pulse_E();
SFRPAGE = SFRPAGE_SAVE; // Restore SFR page
}
// generic send
void lcd_send(uint8_t data, uint8_t type) {
lcd_busy_wait();
if (type) {
lcd_set_data();
} else {
lcd_set_instruction();
}
lcd_set_write();
lcd_set_enable_on();
lcd_set_port_write();
lcd_write(data);
LCD_DELAY;
LCD_DELAY;
lcd_set_enable_off();
}
static int cobalt_lcdfb_blank(int blank_mode, struct fb_info *info)
{
int retval;
retval = lcd_busy_wait(info);
if (retval < 0)
return retval;
switch (blank_mode) {
case FB_BLANK_UNBLANK:
lcd_write_control(info, LCD_ON);
break;
default:
lcd_write_control(info, LCD_OFF);
break;
}
return 0;
}
//------------------------------------------------------------------------------------
// lcd_dat (putchar)
//------------------------------------------------------------------------------------
//
// write a character to the LCD screen
//
char lcd_dat(char dat)
//char putchar(char dat)
{
char SFRPAGE_SAVE;
SFRPAGE_SAVE = SFRPAGE; // Save Current SFR page
SFRPAGE = CONFIG_PAGE;
lcd_busy_wait();
LCD_CTRL_PORT = LCD_CTRL_PORT | RS_MASK; // RS = 1
LCD_CTRL_PORT = LCD_CTRL_PORT & ~RW_MASK; // RW = 0
LCD_DAT_PORT = dat;
small_delay(1); //RPK
pulse_E();
SFRPAGE = SFRPAGE_SAVE; // Restore SFR page
return 1;
}
// generic get
uint8_t lcd_get(uint8_t type) {
uint8_t data;
lcd_busy_wait();
lcd_set_port_read();
lcd_write(0xFF);
if (type) {
lcd_set_data();
} else {
lcd_set_instruction();
}
lcd_set_read();
lcd_set_enable_on();
LCD_DELAY;
LCD_DELAY;
data = lcd_read();
lcd_set_enable_off();
return data;
}
