in hw/display/blizzard.c [482:821]
static void blizzard_reg_write(void *opaque, uint8_t reg, uint16_t value)
{
BlizzardState *s = (BlizzardState *) opaque;
switch (reg) {
case 0x04: /* PLL M-Divider */
s->pll = (value & 0x3f) + 1;
break;
case 0x06: /* PLL Lock Range Control */
s->pll_range = value & 3;
break;
case 0x08: /* PLL Lock Synthesis Control 0 */
s->pll_ctrl &= 0xf00;
s->pll_ctrl |= (value << 0) & 0x0ff;
break;
case 0x0a: /* PLL Lock Synthesis Control 1 */
s->pll_ctrl &= 0x0ff;
s->pll_ctrl |= (value << 8) & 0xf00;
break;
case 0x0c: /* PLL Mode Control 0 */
s->pll_mode = value & 0x77;
if ((value & 3) == 0 || (value & 3) == 3)
fprintf(stderr, "%s: wrong PLL Control bits (%i)\n",
__func__, value & 3);
break;
case 0x0e: /* Clock-Source Select */
s->clksel = value & 0xff;
break;
case 0x10: /* Memory Controller Activate */
s->memenable = value & 1;
break;
case 0x14: /* Memory Controller Bank 0 Status Flag */
break;
case 0x18: /* Auto-Refresh Interval Setting 0 */
s->memrefresh &= 0xf00;
s->memrefresh |= (value << 0) & 0x0ff;
break;
case 0x1a: /* Auto-Refresh Interval Setting 1 */
s->memrefresh &= 0x0ff;
s->memrefresh |= (value << 8) & 0xf00;
break;
case 0x1c: /* Power-On Sequence Timing Control */
s->timing[0] = value & 0x7f;
break;
case 0x1e: /* Timing Control 0 */
s->timing[1] = value & 0x17;
break;
case 0x20: /* Timing Control 1 */
s->timing[2] = value & 0x35;
break;
case 0x24: /* Arbitration Priority Control */
s->priority = value & 1;
break;
case 0x28: /* LCD Panel Configuration */
s->lcd_config = value & 0xff;
if (value & (1 << 7))
fprintf(stderr, "%s: data swap not supported!\n", __func__);
break;
case 0x2a: /* LCD Horizontal Display Width */
s->x = value << 3;
break;
case 0x2c: /* LCD Horizontal Non-display Period */
s->hndp = value & 0xff;
break;
case 0x2e: /* LCD Vertical Display Height 0 */
s->y &= 0x300;
s->y |= (value << 0) & 0x0ff;
break;
case 0x30: /* LCD Vertical Display Height 1 */
s->y &= 0x0ff;
s->y |= (value << 8) & 0x300;
break;
case 0x32: /* LCD Vertical Non-display Period */
s->vndp = value & 0xff;
break;
case 0x34: /* LCD HS Pulse-width */
s->hsync = value & 0xff;
break;
case 0x36: /* LCD HS Pulse Start Position */
s->skipx = value & 0xff;
break;
case 0x38: /* LCD VS Pulse-width */
s->vsync = value & 0xbf;
break;
case 0x3a: /* LCD VS Pulse Start Position */
s->skipy = value & 0xff;
break;
case 0x3c: /* PCLK Polarity */
s->pclk = value & 0x82;
/* Affects calculation of s->hndp, s->hsync and s->skipx. */
break;
case 0x3e: /* High-speed Serial Interface Tx Configuration Port 0 */
s->hssi_config[0] = value;
break;
case 0x40: /* High-speed Serial Interface Tx Configuration Port 1 */
s->hssi_config[1] = value;
if (((value >> 4) & 3) == 3)
fprintf(stderr, "%s: Illegal active-data-links value\n",
__func__);
break;
case 0x42: /* High-speed Serial Interface Tx Mode */
s->hssi_config[2] = value & 0xbd;
break;
case 0x44: /* TV Display Configuration */
s->tv_config = value & 0xfe;
break;
case 0x46 ... 0x4c: /* TV Vertical Blanking Interval Data bits 0 */
s->tv_timing[(reg - 0x46) >> 1] = value;
break;
case 0x4e: /* VBI: Closed Caption / XDS Control / Status */
s->vbi = value;
break;
case 0x50: /* TV Horizontal Start Position */
s->tv_x = value;
break;
case 0x52: /* TV Vertical Start Position */
s->tv_y = value & 0x7f;
break;
case 0x54: /* TV Test Pattern Setting */
s->tv_test = value;
break;
case 0x56: /* TV Filter Setting */
s->tv_filter_config = value & 0xbf;
break;
case 0x58: /* TV Filter Coefficient Index */
s->tv_filter_idx = value & 0x1f;
break;
case 0x5a: /* TV Filter Coefficient Data */
if (s->tv_filter_idx < 0x20)
s->tv_filter_coeff[s->tv_filter_idx ++] = value;
break;
case 0x60: /* Input YUV/RGB Translate Mode 0 */
s->yrc[0] = value & 0xb0;
break;
case 0x62: /* Input YUV/RGB Translate Mode 1 */
s->yrc[1] = value & 0x30;
break;
case 0x64: /* U Data Fix */
s->u = value & 0xff;
break;
case 0x66: /* V Data Fix */
s->v = value & 0xff;
break;
case 0x68: /* Display Mode */
if ((s->mode ^ value) & 3)
s->invalidate = 1;
s->mode = value & 0xb7;
s->enable = value & 1;
s->blank = (value >> 1) & 1;
if (value & (1 << 4))
fprintf(stderr, "%s: Macrovision enable attempt!\n", __func__);
break;
case 0x6a: /* Special Effects */
s->effect = value & 0xfb;
break;
case 0x6c: /* Input Window X Start Position 0 */
s->ix[0] &= 0x300;
s->ix[0] |= (value << 0) & 0x0ff;
break;
case 0x6e: /* Input Window X Start Position 1 */
s->ix[0] &= 0x0ff;
s->ix[0] |= (value << 8) & 0x300;
break;
case 0x70: /* Input Window Y Start Position 0 */
s->iy[0] &= 0x300;
s->iy[0] |= (value << 0) & 0x0ff;
break;
case 0x72: /* Input Window Y Start Position 1 */
s->iy[0] &= 0x0ff;
s->iy[0] |= (value << 8) & 0x300;
break;
case 0x74: /* Input Window X End Position 0 */
s->ix[1] &= 0x300;
s->ix[1] |= (value << 0) & 0x0ff;
break;
case 0x76: /* Input Window X End Position 1 */
s->ix[1] &= 0x0ff;
s->ix[1] |= (value << 8) & 0x300;
break;
case 0x78: /* Input Window Y End Position 0 */
s->iy[1] &= 0x300;
s->iy[1] |= (value << 0) & 0x0ff;
break;
case 0x7a: /* Input Window Y End Position 1 */
s->iy[1] &= 0x0ff;
s->iy[1] |= (value << 8) & 0x300;
break;
case 0x7c: /* Output Window X Start Position 0 */
s->ox[0] &= 0x300;
s->ox[0] |= (value << 0) & 0x0ff;
break;
case 0x7e: /* Output Window X Start Position 1 */
s->ox[0] &= 0x0ff;
s->ox[0] |= (value << 8) & 0x300;
break;
case 0x80: /* Output Window Y Start Position 0 */
s->oy[0] &= 0x300;
s->oy[0] |= (value << 0) & 0x0ff;
break;
case 0x82: /* Output Window Y Start Position 1 */
s->oy[0] &= 0x0ff;
s->oy[0] |= (value << 8) & 0x300;
break;
case 0x84: /* Output Window X End Position 0 */
s->ox[1] &= 0x300;
s->ox[1] |= (value << 0) & 0x0ff;
break;
case 0x86: /* Output Window X End Position 1 */
s->ox[1] &= 0x0ff;
s->ox[1] |= (value << 8) & 0x300;
break;
case 0x88: /* Output Window Y End Position 0 */
s->oy[1] &= 0x300;
s->oy[1] |= (value << 0) & 0x0ff;
break;
case 0x8a: /* Output Window Y End Position 1 */
s->oy[1] &= 0x0ff;
s->oy[1] |= (value << 8) & 0x300;
break;
case 0x8c: /* Input Data Format */
s->iformat = value & 0xf;
s->bpp = blizzard_iformat_bpp[s->iformat];
if (!s->bpp)
fprintf(stderr, "%s: Illegal or unsupported input format %x\n",
__func__, s->iformat);
break;
case 0x8e: /* Data Source Select */
s->source = value & 7;
/* Currently all windows will be "destructive overlays". */
if ((!(s->effect & (1 << 3)) && (s->ix[0] != s->ox[0] ||
s->iy[0] != s->oy[0] ||
s->ix[1] != s->ox[1] ||
s->iy[1] != s->oy[1])) ||
!((s->ix[1] - s->ix[0]) & (s->iy[1] - s->iy[0]) &
(s->ox[1] - s->ox[0]) & (s->oy[1] - s->oy[0]) & 1))
fprintf(stderr, "%s: Illegal input/output window positions\n",
__func__);
blizzard_transfer_setup(s);
break;
case 0x90: /* Display Memory Data Port */
if (!s->data.len && !blizzard_transfer_setup(s))
break;
*s->data.ptr ++ = value;
if (-- s->data.len == 0)
blizzard_window(s);
break;
case 0xa8: /* Border Color 0 */
s->border_r = value;
break;
case 0xaa: /* Border Color 1 */
s->border_g = value;
break;
case 0xac: /* Border Color 2 */
s->border_b = value;
break;
case 0xb4: /* Gamma Correction Enable */
s->gamma_config = value & 0x87;
break;
case 0xb6: /* Gamma Correction Table Index */
s->gamma_idx = value;
break;
case 0xb8: /* Gamma Correction Table Data */
s->gamma_lut[s->gamma_idx ++] = value;
break;
case 0xba: /* 3x3 Matrix Enable */
s->matrix_ena = value & 1;
break;
case 0xbc ... 0xde: /* Coefficient Registers */
s->matrix_coeff[(reg - 0xbc) >> 1] = value & ((reg & 2) ? 0x80 : 0xff);
break;
case 0xe0: /* 3x3 Matrix Red Offset */
s->matrix_r = value;
break;
case 0xe2: /* 3x3 Matrix Green Offset */
s->matrix_g = value;
break;
case 0xe4: /* 3x3 Matrix Blue Offset */
s->matrix_b = value;
break;
case 0xe6: /* Power-save */
s->pm = value & 0x83;
if (value & s->mode & 1)
fprintf(stderr, "%s: The display must be disabled before entering "
"Standby Mode\n", __func__);
break;
case 0xe8: /* Non-display Period Control / Status */
s->status = value & 0x1b;
break;
case 0xea: /* RGB Interface Control */
s->rgbgpio_dir = value & 0x8f;
break;
case 0xec: /* RGB Interface Status */
s->rgbgpio = value & 0xcf;
break;
case 0xee: /* General-purpose IO Pins Configuration */
s->gpio_dir = value;
break;
case 0xf0: /* General-purpose IO Pins Status / Control */
s->gpio = value;
break;
case 0xf2: /* GPIO Positive Edge Interrupt Trigger */
s->gpio_edge[0] = value;
break;
case 0xf4: /* GPIO Negative Edge Interrupt Trigger */
s->gpio_edge[1] = value;
break;
case 0xf6: /* GPIO Interrupt Status */
s->gpio_irq &= value;
break;
case 0xf8: /* GPIO Pull-down Control */
s->gpio_pdown = value;
break;
default:
fprintf(stderr, "%s: unknown register %02x\n", __func__, reg);
break;
}
}