sed135x_16bit.c

来自「eCos操作系统源码」· C语言 代码 · 共 619 行 · 第 1/2 页

extern void fs6377_init(int);
// Why doesn't the real mode work?
#define fs6377_init(mode) _csb281_fs6377_init(0)

// global flags to determine what, if anything, was found
static int sed135x_ok;
static int sed_disp_mode_crt;

// GPIO1 is used to control the LCD backlight on many CSB's
#define SED1356_BKL_ON          SED1356_REG_GPIO_CTL |= H2SED(SED1356_GPIO_GPIO1)   // GPIO1 = 1 
#define SED1356_BKL_OFF         SED1356_REG_GPIO_CTL &= H2SED(~SED1356_GPIO_GPIO1)  // GPIO1 = 0

// GPIO2 is used to sense the presence of a monitor.  0 = monitor connected, 1 = no monitor
// we invert the sense to make it easier to test and more logical.
#define SED1356_CRT             SED1356_REG_GPIO_CTL & H2SED(SED1356_GPIO_GPIO2)

#define SED_ROW_SIZE(_depth_)   ((PIXELS_PER_ROW * _depth_) / 8)

//--------------------------------------------------------------------------
// sed135x_on
//
// This function turns on the SED1355 or SED1356 LCD and/or CRT
//
static void 
sed135x_on(void)
{
    uchar temp8;
    int i;

    sed135x_off();

    // Turn on the LCD and/or CRT
    // The SED1356 supports seperate LCD and CRT timing registers
    // that have already been setup.  We just blank the side we 
    // aren't using and enable the other.
    if (sed_disp_mode_crt) {  // 1 = CRT Mode
        // Blank the LCD and CRT
        SED1356_REG_LCD_DISP_MODE_and_MISC |= H2SED(SED1356_LCD_DISP_BLANK);
        SED1356_REG_CRT_DISP_MODE |= H2SED(SED1356_CRT_DISP_BLANK);

        // turn the LCD backlight off
        sed_lcd_bkl(0);

        // Set the SED1356 to CRT Mode
        SED1356_REG_DISP_MODE = H2SED(SED1356_DISP_SWIV_NORM | 
                                      SED1356_DISP_MODE_CRT);

        // Turn on the CRT
        SED1356_REG_CRT_DISP_MODE &= ~H2SED(SED1356_CRT_DISP_BLANK);
    } // if CRT mode
    else {  // 0 = LCD Mode
        // Blank the LCD and CRT
        SED1356_REG_LCD_DISP_MODE_and_MISC |= H2SED(SED1356_LCD_DISP_BLANK);
        SED1356_REG_CRT_DISP_MODE |= H2SED(SED1356_CRT_DISP_BLANK);

        // Set the SED1356 to LCD Mode
        SED1356_REG_DISP_MODE = H2SED(SED1356_DISP_SWIV_NORM | 
                                      SED1356_DISP_MODE_LCD);

        // Turn on the LCD
        SED1356_REG_LCD_DISP_MODE_and_MISC &= ~H2SED(SED1356_LCD_DISP_BLANK);
        sed_lcd_bkl(0xff);    // turn the LCD backlight on/full brightness
    } // else LCD Mode
}

//--------------------------------------------------------------------------
// sed_lcd_bkl()
//
// This function turns on the LCD backlight connected to GPIO1.  This is
// not used if the board has a different method of controlling the
// backlight.  Since the Sed has only a single GPIO bit and no way
// to modulate it, we use any non-zero value of bright to turn it on.
//
static void 
sed_lcd_bkl(uchar bright)
{
    // Any non-zero value for bright means on
    if (bright) 
        SED1356_BKL_ON;
    else 
        SED1356_BKL_OFF;

}

//--------------------------------------------------------------------------
// sed135x_off
//
// This function turns off the SED1356 LCD and/or CRT and the display
// fifo.  It can also turn off the clocks if mode is true, thus allowing
// the programmable clock generator to be changed.
//
static void 
sed135x_off(void)
{
    SED1356_REG_DISP_MODE = H2SED(SED1356_DISP_SWIV_NORM | 
                                  SED1356_DISP_MODE_OFF);
    sed_lcd_bkl(0);  // turn the LCD backlight off
}

//--------------------------------------------------------------------------
// sed135x_init
//
// This function sets up the sed1355 or sed1356 whichever is found
//
int 
sed135x_init(int depth, struct lcd_info *lcd)
{
    vushort temp16;
    int i;
  
    sed135x_ok = 0;
    sed_disp_mode_crt = 0;  // assume LCD

    if ((depth != 4) && (depth != 8) && (depth != 16)) {
        diag_printf("Invalid depth: %d\n", depth);
        return -1;
    }

    // enable host access
    SED1356_REG_REV_and_MISC = 0x0000;

    // Check the ID to make sure we even have a SED1356 installed
    temp16 = SED1356_REG_REV_and_MISC & H2SED(SED1356_REV_ID_MASK);

    if (temp16 != H2SED(SED1356_REV_ID_1356)){
        diag_printf("SED1356 Not Found! SED_REG_REV = %04x.\n", temp16);
        return -1;
    }

    // Disable the display
    SED1356_REG_DISP_MODE = H2SED(SED1356_DISP_SWIV_NORM | 
                                  SED1356_DISP_MODE_OFF);

    // Test for the presence of a CRT
    SED1356_REG_GPIO_CTL = 0x0000;                      // Disable Backlight 
    SED1356_REG_GPIO_CFG = H2SED(SED1356_GPIO_GPIO1);  // GPIO1 Out, GPIO2 In
    if (SED1356_CRT) sed_disp_mode_crt = 0; 
    else sed_disp_mode_crt = 1;

    // Enable Power Save Mode before we mess with the clocks
    SED1356_REG_MEM_CFG_and_REF_RATE = H2SED(SED1356_REF_TYPE_SELF); // set dram to self refresh first
    // shut off MCLK
    SED1356_REG_PWR_CFG_and_STAT = H2SED(SED1356_PWR_MCLK);

    // Wait until power is down - when MCLK bit goes true
    while ((SED1356_REG_PWR_CFG_and_STAT & H2SED(SED1356_PWR_MCLK)) == 0){}

    // Change the programmable clock generator to the desired timing
    if (sed_disp_mode_crt) fs6377_init(SED_DISP_MODE_CRT);
    else fs6377_init(SED_DISP_MODE_LCD);

    // Re-enable Power
    SED1356_REG_PWR_CFG_and_STAT = 0x0000;

    // Common Control Registers
    SED1356_REG_MCLK_CFG = H2SED(SED1356_MCLK_SRC_BCLK);
    SED1356_REG_LCD_PCLK_CFG = H2SED(SED1356_PCLK_SRC_CLKI);
    SED1356_REG_CRT_PCLK_CFG = H2SED(SED1356_PCLK_SRC_CLKI);
    SED1356_REG_MEDIA_PCLK_CFG = 0x0000;
    SED1356_REG_WAIT_STATE = H2SED(0x0001);
    SED1356_REG_MEM_CFG_and_REF_RATE = H2SED(SED1356_MEM_CFG_2CAS_EDO | 
                                             SED1356_REF_RATE_2048);
    SED1356_REG_MEM_TMG0_and_1 = H2SED(SED1356_MEM_TMG0_EDO50_MCLK33 | 
                                       SED1356_MEM_TMG1_EDO50_MCLK33);
    SED1356_REG_PANEL_TYPE_and_MOD_RATE = H2SED(SED1356_PANEL_TYPE_16 | 
                                                SED1356_PANEL_TYPE_CLR | 
                                                SED1356_PANEL_TYPE_TFT);

    // LCD Specific Registers
    SED1356_REG_LCD_HOR_DISP = H2SED((PIXELS_PER_ROW/8) - 1);
    SED1356_REG_LCD_HOR_NONDISP_and_START = H2SED(SED_HOR_NONDISP_LCD | 
                                                  (SED_HOR_PULSE_START_LCD << 8));
    SED1356_REG_LCD_HOR_PULSE = H2SED(SED1356_PULSE_WID(SED_HOR_PULSE_WIDTH_LCD) | 
                                      SED1356_PULSE_POL_LOW);
    SED1356_REG_LCD_VER_DISP_HT_LO_and_HI = H2SED((PIXELS_PER_COL - 1) & 0x3ff);
    SED1356_REG_LCD_VER_NONDISP_and_START = H2SED(SED_VER_NONDISP_LCD | 
                                                  (SED_VER_PULSE_START_LCD << 8));
    SED1356_REG_LCD_VER_PULSE = H2SED(SED1356_PULSE_WID(SED_VER_PULSE_WIDTH_LCD) | 
                                      SED1356_PULSE_POL_LOW);
    switch (depth) {
    case 4:  SED1356_REG_LCD_DISP_MODE_and_MISC = H2SED(SED1356_LCD_DISP_BLANK | 
                                                        SED1356_LCD_DISP_SWIV_NORM | 
                                                        SED1356_LCD_DISP_4BPP);  
        break;
    case 8:  SED1356_REG_LCD_DISP_MODE_and_MISC = H2SED(SED1356_LCD_DISP_BLANK | 
                                                        SED1356_LCD_DISP_SWIV_NORM | 
                                                        SED1356_LCD_DISP_8BPP);  
        break;
    default: SED1356_REG_LCD_DISP_MODE_and_MISC = H2SED(SED1356_LCD_DISP_BLANK | 
                                                        SED1356_LCD_DISP_SWIV_NORM | 
                                                        SED1356_LCD_DISP_16BPP); break;
    }

    SED1356_REG_LCD_DISP_START_LO_and_MID = 0x0000;
    SED1356_REG_LCD_DISP_START_HI = 0x0000;
    SED1356_REG_LCD_ADD_OFFSET_LO_and_HI = H2SED((SED_ROW_SIZE(depth) / 2) & 0x7ff);
    SED1356_REG_LCD_PIXEL_PAN = 0x0000;
    SED1356_REG_LCD_FIFO_THRESH_LO_and_HI = 0x0000;  // auto mode

    // LCD Specific Registers
    SED1356_REG_CRT_HOR_DISP = H2SED((PIXELS_PER_ROW/8) - 1);
    SED1356_REG_CRT_HOR_NONDISP_and_START = H2SED(SED_HOR_NONDISP_CRT | 
                                                  (SED_HOR_PULSE_START_CRT << 8));
    SED1356_REG_CRT_HOR_PULSE = H2SED(SED1356_PULSE_WID(SED_HOR_PULSE_WIDTH_CRT) | 
                                      SED1356_PULSE_POL_LOW);
    SED1356_REG_CRT_VER_DISP_HT_LO_and_HI = H2SED((PIXELS_PER_COL - 1) & 0x3ff);
    SED1356_REG_CRT_VER_NONDISP_and_START = H2SED(SED_VER_NONDISP_CRT | 
                                                  (SED_VER_PULSE_START_CRT << 8));
    SED1356_REG_CRT_VER_PULSE_and_OUT_CTL = H2SED(SED1356_PULSE_WID(SED_VER_PULSE_WIDTH_CRT) | 
                                                  SED1356_PULSE_POL_LOW | SED1356_CRT_OUT_DAC_LVL);
    switch (depth) {
    case 4:  SED1356_REG_CRT_DISP_MODE = H2SED(SED1356_CRT_DISP_BLANK | 
                                               SED1356_CRT_DISP_4BPP);  
        break;
    case 8:  SED1356_REG_CRT_DISP_MODE = H2SED(SED1356_CRT_DISP_BLANK | 
                                               SED1356_CRT_DISP_8BPP);  
        break;
    default: SED1356_REG_CRT_DISP_MODE = H2SED(SED1356_CRT_DISP_BLANK | 
                                               SED1356_CRT_DISP_16BPP); 
        break;
    }


    SED1356_REG_CRT_DISP_START_LO_and_MID = 0x0000;
    SED1356_REG_CRT_DISP_START_HI = 0x0000;
    SED1356_REG_CRT_ADD_OFFSET_LO_and_HI = H2SED((SED_ROW_SIZE(depth) / 2) & 0x7ff);
    SED1356_REG_CRT_PIXEL_PAN = 0x0000;
    SED1356_REG_CRT_FIFO_THRESH_LO_and_HI = 0x0000;  // auto mode

    // Disable Cursor
    SED1356_REG_LCD_CURSOR_CTL_and_START_ADD = 0x0000;
    SED1356_REG_CRT_CURSOR_CTL_and_START_ADD = 0x0000;

    // Disable BitBlt
    SED1356_REG_BLT_CTL_0_and_1 = 0x0000;
    SED1356_REG_BLT_ROP_CODE_and_BLT_OP = 0x0000;
    SED1356_REG_BLT_SRC_START_LO_and_MID = 0x0000;
    SED1356_REG_BLT_SRC_START_HI = 0x0000;
    SED1356_REG_BLT_DEST_START_LO_and_MID = 0x0000;
    SED1356_REG_BLT_DEST_START_HI = 0x0000;
    SED1356_REG_BLT_ADD_OFFSET_LO_and_HI = 0x0000;
    SED1356_REG_BLT_WID_LO_and_HI = 0x0000;
    SED1356_REG_BLT_HGT_LO_and_HI = 0x0000;
    SED1356_REG_BLT_BG_CLR_LO_and_HI = 0x0000;
    SED1356_REG_BLT_FG_CLR_LO_and_HI = 0x0000;

    // Fill the LUT, write to both LCD and CRT luts simultaneously
    SED1356_REG_LUT_MODE = 0x0000;
    for (i = 0; i < 256; i++){

        SED1356_REG_LUT_ADD = H2SED(i);
        SED1356_REG_LUT_DATA = H2SED(sed_lut_16bit[i][0]);  // red
        SED1356_REG_LUT_DATA = H2SED(sed_lut_16bit[i][1]);  // green
        SED1356_REG_LUT_DATA = H2SED(sed_lut_16bit[i][2]);  // blue
    }

    // Disable Power Save Mode
    SED1356_REG_PWR_CFG_and_STAT = 0x0000;

    // Set Watchdog               
//  SED1356_REG_WATCHDOG_CTL = 0x0000;

    // Device found & initialized
    sed135x_ok = 1;

    // turn on the display
    sed135x_on();

    // Fill in the info structure
    lcd->height = 480;            // FIXME
    lcd->width = 640;             // FIXME
    lcd->bpp = depth;
    lcd->type = FB_TRUE_RGB565;
    lcd->rlen = (640*2*2);        // FIXME
    lcd->access_size = 2;         // Framebuffer fixed at 16 bit access
    lcd->stride = 4;              // Only on "odd" 16 byte chunks
    lcd->fb = SED_GET_PHYS_ADD(0);
    lcd->on = sed135x_on;
    lcd->off = sed135x_off;

    return 0;
}

//--------------------------------------------------------------------------
// sed_pwr_dn()
static void 
sed_pwr_dn(void)
{

    // Enable Host Access
    SED1356_REG_REV_and_MISC = 0x0000;

    // Disable the display
    SED1356_REG_DISP_MODE = H2SED(SED1356_DISP_MODE_OFF);

    // Enable Power Save Mode
    // set dram to self refresh first
    SED1356_REG_MEM_CFG_and_REF_RATE = H2SED(SED1356_REF_TYPE_SELF);

    // shut off MCLK
    SED1356_REG_PWR_CFG_and_STAT = H2SED(SED1356_PWR_MCLK);

    // Wait until power is down - when MCLK bit goes true
    while ((SED1356_REG_PWR_CFG_and_STAT & H2SED(SED1356_PWR_MCLK)) == 0){}
}