diff options
Diffstat (limited to 'drivers/staging/sm750fb/ddk750_mode.c')
-rw-r--r-- | drivers/staging/sm750fb/ddk750_mode.c | 205 |
1 files changed, 205 insertions, 0 deletions
diff --git a/drivers/staging/sm750fb/ddk750_mode.c b/drivers/staging/sm750fb/ddk750_mode.c new file mode 100644 index 0000000..2e418fb --- /dev/null +++ b/drivers/staging/sm750fb/ddk750_mode.c @@ -0,0 +1,205 @@ + +#include "ddk750_help.h" +#include "ddk750_reg.h" +#include "ddk750_mode.h" +#include "ddk750_chip.h" + +/* + SM750LE only: + This function takes care extra registers and bit fields required to set + up a mode in SM750LE + + Explanation about Display Control register: + HW only supports 7 predefined pixel clocks, and clock select is + in bit 29:27 of Display Control register. +*/ +static unsigned long displayControlAdjust_SM750LE(mode_parameter_t *pModeParam, unsigned long dispControl) +{ + unsigned long x, y; + + x = pModeParam->horizontal_display_end; + y = pModeParam->vertical_display_end; + + /* SM750LE has to set up the top-left and bottom-right + registers as well. + Note that normal SM750/SM718 only use those two register for + auto-centering mode. + */ + POKE32(CRT_AUTO_CENTERING_TL, + FIELD_VALUE(0, CRT_AUTO_CENTERING_TL, TOP, 0) + | FIELD_VALUE(0, CRT_AUTO_CENTERING_TL, LEFT, 0)); + + POKE32(CRT_AUTO_CENTERING_BR, + FIELD_VALUE(0, CRT_AUTO_CENTERING_BR, BOTTOM, y-1) + | FIELD_VALUE(0, CRT_AUTO_CENTERING_BR, RIGHT, x-1)); + + /* Assume common fields in dispControl have been properly set before + calling this function. + This function only sets the extra fields in dispControl. + */ + + /* Clear bit 29:27 of display control register */ + dispControl &= FIELD_CLEAR(CRT_DISPLAY_CTRL, CLK); + + /* Set bit 29:27 of display control register for the right clock */ + /* Note that SM750LE only need to supported 7 resoluitons. */ + if ( x == 800 && y == 600 ) + dispControl = FIELD_SET(dispControl, CRT_DISPLAY_CTRL, CLK, PLL41); + else if (x == 1024 && y == 768) + dispControl = FIELD_SET(dispControl, CRT_DISPLAY_CTRL, CLK, PLL65); + else if (x == 1152 && y == 864) + dispControl = FIELD_SET(dispControl, CRT_DISPLAY_CTRL, CLK, PLL80); + else if (x == 1280 && y == 768) + dispControl = FIELD_SET(dispControl, CRT_DISPLAY_CTRL, CLK, PLL80); + else if (x == 1280 && y == 720) + dispControl = FIELD_SET(dispControl, CRT_DISPLAY_CTRL, CLK, PLL74); + else if (x == 1280 && y == 960) + dispControl = FIELD_SET(dispControl, CRT_DISPLAY_CTRL, CLK, PLL108); + else if (x == 1280 && y == 1024) + dispControl = FIELD_SET(dispControl, CRT_DISPLAY_CTRL, CLK, PLL108); + else /* default to VGA clock */ + dispControl = FIELD_SET(dispControl, CRT_DISPLAY_CTRL, CLK, PLL25); + + /* Set bit 25:24 of display controller */ + dispControl = FIELD_SET(dispControl, CRT_DISPLAY_CTRL, CRTSELECT, CRT); + dispControl = FIELD_SET(dispControl, CRT_DISPLAY_CTRL, RGBBIT, 24BIT); + + /* Set bit 14 of display controller */ + dispControl = FIELD_SET(dispControl, CRT_DISPLAY_CTRL, CLOCK_PHASE, ACTIVE_LOW); + + POKE32(CRT_DISPLAY_CTRL, dispControl); + + return dispControl; +} + + + +/* only timing related registers will be programed */ +static int programModeRegisters(mode_parameter_t * pModeParam,pll_value_t * pll) +{ + int ret = 0; + int cnt = 0; + unsigned int ulTmpValue,ulReg; + if(pll->clockType == SECONDARY_PLL) + { + /* programe secondary pixel clock */ + POKE32(CRT_PLL_CTRL,formatPllReg(pll)); + POKE32(CRT_HORIZONTAL_TOTAL, + FIELD_VALUE(0, CRT_HORIZONTAL_TOTAL, TOTAL, pModeParam->horizontal_total - 1) + | FIELD_VALUE(0, CRT_HORIZONTAL_TOTAL, DISPLAY_END, pModeParam->horizontal_display_end - 1)); + + POKE32(CRT_HORIZONTAL_SYNC, + FIELD_VALUE(0, CRT_HORIZONTAL_SYNC, WIDTH, pModeParam->horizontal_sync_width) + | FIELD_VALUE(0, CRT_HORIZONTAL_SYNC, START, pModeParam->horizontal_sync_start - 1)); + + POKE32(CRT_VERTICAL_TOTAL, + FIELD_VALUE(0, CRT_VERTICAL_TOTAL, TOTAL, pModeParam->vertical_total - 1) + | FIELD_VALUE(0, CRT_VERTICAL_TOTAL, DISPLAY_END, pModeParam->vertical_display_end - 1)); + + POKE32(CRT_VERTICAL_SYNC, + FIELD_VALUE(0, CRT_VERTICAL_SYNC, HEIGHT, pModeParam->vertical_sync_height) + | FIELD_VALUE(0, CRT_VERTICAL_SYNC, START, pModeParam->vertical_sync_start - 1)); + + + ulTmpValue = FIELD_VALUE(0,CRT_DISPLAY_CTRL,VSYNC_PHASE,pModeParam->vertical_sync_polarity)| + FIELD_VALUE(0,CRT_DISPLAY_CTRL,HSYNC_PHASE,pModeParam->horizontal_sync_polarity)| + FIELD_SET(0,CRT_DISPLAY_CTRL,TIMING,ENABLE)| + FIELD_SET(0,CRT_DISPLAY_CTRL,PLANE,ENABLE); + + + if(getChipType() == SM750LE){ + displayControlAdjust_SM750LE(pModeParam,ulTmpValue); + }else{ + ulReg = PEEK32(CRT_DISPLAY_CTRL) + & FIELD_CLEAR(CRT_DISPLAY_CTRL,VSYNC_PHASE) + & FIELD_CLEAR(CRT_DISPLAY_CTRL,HSYNC_PHASE) + & FIELD_CLEAR(CRT_DISPLAY_CTRL,TIMING) + & FIELD_CLEAR(CRT_DISPLAY_CTRL,PLANE); + + POKE32(CRT_DISPLAY_CTRL,ulTmpValue|ulReg); + } + + } + else if(pll->clockType == PRIMARY_PLL) + { + unsigned int ulReservedBits; + POKE32(PANEL_PLL_CTRL,formatPllReg(pll)); + + POKE32(PANEL_HORIZONTAL_TOTAL, + FIELD_VALUE(0, PANEL_HORIZONTAL_TOTAL, TOTAL, pModeParam->horizontal_total - 1) + | FIELD_VALUE(0, PANEL_HORIZONTAL_TOTAL, DISPLAY_END, pModeParam->horizontal_display_end - 1)); + + POKE32(PANEL_HORIZONTAL_SYNC, + FIELD_VALUE(0, PANEL_HORIZONTAL_SYNC, WIDTH, pModeParam->horizontal_sync_width) + | FIELD_VALUE(0, PANEL_HORIZONTAL_SYNC, START, pModeParam->horizontal_sync_start - 1)); + + POKE32(PANEL_VERTICAL_TOTAL, + FIELD_VALUE(0, PANEL_VERTICAL_TOTAL, TOTAL, pModeParam->vertical_total - 1) + | FIELD_VALUE(0, PANEL_VERTICAL_TOTAL, DISPLAY_END, pModeParam->vertical_display_end - 1)); + + POKE32(PANEL_VERTICAL_SYNC, + FIELD_VALUE(0, PANEL_VERTICAL_SYNC, HEIGHT, pModeParam->vertical_sync_height) + | FIELD_VALUE(0, PANEL_VERTICAL_SYNC, START, pModeParam->vertical_sync_start - 1)); + + ulTmpValue = FIELD_VALUE(0,PANEL_DISPLAY_CTRL,VSYNC_PHASE,pModeParam->vertical_sync_polarity)| + FIELD_VALUE(0,PANEL_DISPLAY_CTRL,HSYNC_PHASE,pModeParam->horizontal_sync_polarity)| + FIELD_VALUE(0,PANEL_DISPLAY_CTRL,CLOCK_PHASE,pModeParam->clock_phase_polarity)| + FIELD_SET(0,PANEL_DISPLAY_CTRL,TIMING,ENABLE)| + FIELD_SET(0,PANEL_DISPLAY_CTRL,PLANE,ENABLE); + + ulReservedBits = FIELD_SET(0, PANEL_DISPLAY_CTRL, RESERVED_1_MASK, ENABLE) | + FIELD_SET(0, PANEL_DISPLAY_CTRL, RESERVED_2_MASK, ENABLE) | + FIELD_SET(0, PANEL_DISPLAY_CTRL, RESERVED_3_MASK, ENABLE)| + FIELD_SET(0,PANEL_DISPLAY_CTRL,VSYNC,ACTIVE_LOW); + + ulReg = (PEEK32(PANEL_DISPLAY_CTRL) & ~ulReservedBits) + & FIELD_CLEAR(PANEL_DISPLAY_CTRL, CLOCK_PHASE) + & FIELD_CLEAR(PANEL_DISPLAY_CTRL, VSYNC_PHASE) + & FIELD_CLEAR(PANEL_DISPLAY_CTRL, HSYNC_PHASE) + & FIELD_CLEAR(PANEL_DISPLAY_CTRL, TIMING) + & FIELD_CLEAR(PANEL_DISPLAY_CTRL, PLANE); + + + /* May a hardware bug or just my test chip (not confirmed). + * PANEL_DISPLAY_CTRL register seems requiring few writes + * before a value can be succesfully written in. + * Added some masks to mask out the reserved bits. + * Note: This problem happens by design. The hardware will wait for the + * next vertical sync to turn on/off the plane. + */ + + POKE32(PANEL_DISPLAY_CTRL,ulTmpValue|ulReg); +#if 1 + while((PEEK32(PANEL_DISPLAY_CTRL) & ~ulReservedBits) != (ulTmpValue|ulReg)) + { + cnt++; + if(cnt > 1000) + break; + POKE32(PANEL_DISPLAY_CTRL,ulTmpValue|ulReg); + } +#endif + } + else{ + ret = -1; + } + return ret; +} + +int ddk750_setModeTiming(mode_parameter_t * parm,clock_type_t clock) +{ + pll_value_t pll; + unsigned int uiActualPixelClk; + pll.inputFreq = DEFAULT_INPUT_CLOCK; + pll.clockType = clock; + + uiActualPixelClk = calcPllValue(parm->pixel_clock,&pll); + if(getChipType() == SM750LE){ + /* set graphic mode via IO method */ + outb_p(0x88,0x3d4); + outb_p(0x06,0x3d5); + } + programModeRegisters(parm,&pll); + return 0; +} + + |