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control: clean up register bit definitions.

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This commit is contained in:
Maxim Poliakovski 2024-04-11 17:50:17 +02:00
parent 45d2c8854d
commit 96efc99a00
1 changed files with 25 additions and 23 deletions
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48
devices/video/control.h
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@ -47,20 +47,20 @@ enum ControlRegs : int {
VBPEQ = 0x05, // vertical back porch with EQ (rw) 12 bits
VSYNC = 0x06, // vertical sync starting point (rw) 12 bits
VHLINE = 0x07, // vertical half line (rw) 12 bits
PIPE_DELAY = 0x08, // controls pixel pipe delay (rw) 10 bits, ndrv says 12 bits but only 10 are writable
PIPE_DELAY = 0x08, // controls pixel pipe delay (rw) ndrv says 12 bits but only 10 are writable
HPIX = 0x09, // horizontal pixel count (rw) 12 bits
HFP = 0x0A, // horizontal front porch (rw) 12 bits
HAL = 0x0B, // horizontal active line (rw) 12 bits
HBWAY = 0x0C, // horizontal breezeway (rw) 12 bits
HSP = 0x0D, // horizontal sync starting point (rw) 12 bits
HEQ = 0x0E, // horizontal equalization (rw) 8 bits, ndrv says 12 bits but only 8 are writable
HEQ = 0x0E, // horizontal equalization (rw) ndrv says 12 bits but only 8 are writable
HLFLN = 0x0F, // horizontal half line (rw) 12 bits
HSERR = 0x10, // horizontal serration (rw) 12 bits
CNTTST = 0x11, // Swatch counter test value (rw) 12 bits
SWATCH_CTRL = 0x12, // Swatch timing generator control (rw) 11 bits
GBASE = 0x13, // graphics base address (rw) 22 bits, 32 byte aligned
ROW_WORDS = 0x14, // framebuffer pitch (rw) 15 bits, 32 byte aligned
MON_SENSE = 0x15, // Monitor sense control & status (rw) 9 bits (three groups of 3-bits; the two LSB groups are writable)
MON_SENSE = 0x15, // Monitor sense control & status (rw) 9 bits
MISC_ENABLES = 0x16, // controls chip's features (rw) 12 bits
GSC_DIVIDE = 0x17, // graphics clock divide count (rw) 2 bits
REFRESH_COUNT = 0x18, // VRAM refresh counter (rw) 10 bits
@ -72,33 +72,34 @@ enum ControlRegs : int {
// Bit definitions for the video timing generator (Swatch) control register.
enum {
// 1 = 1 << 0, //
// 1 = 1 << 1, //
VSYNC_CNT_LOAD = 1 << 0, //
VSYNC_CNT_STOP = 1 << 1, //
VSYNC_POLARITY = 1 << 2, // 0 - negative, 1 - positive
RESET_TIMING = 1 << 3, // toggle this bit to change timing parameters
// 1 = 1 << 4, //
// 1 = 1 << 5, //
HSYNC_CNT_LOAD = 1 << 4, //
HSYNC_CNT_STOP = 1 << 5, //
HSYNC_POLARITY = 1 << 6, // 0 - negative, 1 - positive
// 0 = 1 << 7, //
INTERLACED = 1 << 8, // 0 - progressive, 1 = interlaced
// 0=unused = 1 << 9,
ADJ_FIELD_ONE = 1 << 7, // 1- field I parameters are increased by 1
ADJ_FIELD_TWO = 1 << 8, // 1- field II parameters are increased by 1
TEST_ENABLE = 1 << 9, // counter test enable, probably unimplemented in Control
DISABLE_TIMING = 1 << 10, // 1 - disable video timing, 0 - enable it
};
// Bit definitions for MISC_ENABLES register.
enum {
SCAN_CONTROL = 1 << 0, // 0 - interlaced, 1 - progressive; opposite of INTERLACED above
FB_ENDIAN_LITTLE = 1 << 1, // framebuffer endianness: 0 - big, 1 - little // 1 also makes ControlRegs big endian
DOUBLE_BUFFERING = 1 << 2, // the same data transfers are generated for both the standard bank of VRAM and the optional bank
STANDARD_BANK_DISABLE = 1 << 3, // 0 - data transfers are to be performed for the standard bank of VRAM
SHIFT_CLOCK = 1 << 4, // shift clock is to be generated
DETECT_PAGE_HITS = 1 << 5, // VRAM state machines detect page hits on the system bus to frame buffer single beat writes
VRAM_WIDE_MODE = 1 << 6, // VRAM bus width: 1 - 128bit, 0 - 64bit
MHZ_30_50 = 1 << 7, // 0 - 50 MHz, 1 - 33 MHz // setting this to 33 MHz causes system to hang
VSYNC_DISABLE = 1 << 8, // 0 - enable vertical sync, 1 - disable it
HSYNC_DISABLE = 1 << 9, // 0 - enable horizontal sync, 1 - disable it
CSYNC_DISABLE = 1 << 10, // 0 - enable composite sync, 1 - disable it
BLANK_DISABLE = 1 << 11, // 0 - enable blanking, 1 - disable it
SCAN_CONTROL = 1 << 0, // 0 - interlaced, 1 - progressive
FB_ENDIAN_LITTLE = 1 << 1, // framebuffer endianness: 0 - big, 1 - little,
// 1 also makes ControlRegs big endian
DOUBLE_BUFFERING = 1 << 2, // 1 - enables double buffering
STD_BANK_DISABLE = 1 << 3, // 0 - standard VRAM bank enabled, 1 - disabled
PAGE_DETECT_ENABLE = 1 << 4, // always enabled (set to 1) in the driver
REFRESH_TIMING = 1 << 5, // ?
VRAM_WIDE_MODE = 1 << 6, // VRAM bus width: 1 - 128bit, 0 - 64bit
TRISTATE_OUTPUTS = 1 << 7, // 1 - causes outputs to be tristated
VSYNC_DISABLE = 1 << 8, // 0 - enable vertical sync, 1 - disable it
HSYNC_DISABLE = 1 << 9, // 0 - enable horizontal sync, 1 - disable it
CSYNC_DISABLE = 1 << 10, // 0 - enable composite sync, 1 - disable it
BLANK_DISABLE = 1 << 11, // 0 - enable blanking, 1 - disable it
};
// Bit definitions for INT_ENABLE & INT_STATUS registers.
@ -124,7 +125,8 @@ public:
void write(uint32_t rgn_start, uint32_t offset, uint32_t value, int size);
protected:
void change_one_bar(uint32_t &aperture, uint32_t aperture_size, uint32_t aperture_new, int bar_num);
void change_one_bar(uint32_t &aperture, uint32_t aperture_size, uint32_t aperture_new,
int bar_num);
void notify_bar_change(int bar_num);
void enable_display();