static void
update_wids(FFBPtr pFfb, int index)
{
ffb_dac_info_t *p = &pFfb->dac_info;
ffb_dacPtr dac = pFfb->dac;
unsigned int base;
int limit;
if (pFfb->vtSema)
return;
if (p->flags & FFB_DAC_PAC1)
base = FFBDAC_PAC1_SPWLUT(index);
else
base = FFBDAC_PAC2_SPWLUT(index);
DACCFG_WRITE(dac, base, p->wid_table.wid_pool[index].wlut_regval);
/* Schedule the window transfer. */
DACCFG_WRITE(dac, FFBDAC_CFG_WTCTRL,
(FFBDAC_CFG_WTCTRL_TCMD | FFBDAC_CFG_WTCTRL_TE));
limit = 1000000;
while (limit--) {
unsigned int wtctrl = DACCFG_READ(dac, FFBDAC_CFG_WTCTRL);
if ((wtctrl & FFBDAC_CFG_WTCTRL_DS) == 0)
break;
}
}
static void
FFBI2CPutBits(I2CBusPtr b, int clock, int data)
{
FFBPtr pFfb = GET_FFB_FROM_SCRN(xf86Screens[b->scrnIndex]);
ffb_dacPtr dac = pFfb->dac;
unsigned int val;
#ifdef MDATA_NEEDS_BLANK
unsigned int uctrl;
#endif
val = 0;
if (clock)
val |= FFBDAC_CFG_MPDATA_SCL;
if (data)
val |= FFBDAC_CFG_MPDATA_SDA;
#ifdef MDATA_NEEDS_BLANK
/* Force a blank of the screen. */
uctrl = DACCFG_READ(dac, FFBDAC_CFG_UCTRL);
DACCFG_WRITE(dac, FFBDAC_CFG_UCTRL,
(uctrl | FFBDAC_UCTRL_ABLANK));
#endif
/* Tristate requested pins. */
DACCFG_WRITE(dac, FFBDAC_CFG_MPDATA, val);
#ifdef MDATA_NEEDS_BLANK
/* Restore UCTRL to unblank the screen. */
DACCFG_WRITE(dac, FFBDAC_CFG_UCTRL, uctrl);
#endif
}
/* DDC1/DDC2 support */
static unsigned int
FFBDacDdc1Read(ScrnInfoPtr pScrn)
{
FFBPtr pFfb = GET_FFB_FROM_SCRN(pScrn);
ffb_dacPtr dac = pFfb->dac;
unsigned int val;
#ifdef MDATA_NEEDS_BLANK
unsigned int uctrl;
#endif
#ifdef MDATA_NEEDS_BLANK
/* Force a blank of the screen. */
uctrl = DACCFG_READ(dac, FFBDAC_CFG_UCTRL);
DACCFG_WRITE(dac, FFBDAC_CFG_UCTRL,
(uctrl | FFBDAC_UCTRL_ABLANK));
#endif
/* Tristate SCL pin. */
DACCFG_WRITE(dac, FFBDAC_CFG_MPDATA,
FFBDAC_CFG_MPDATA_SCL);
/* Pause until VSYNC is hit. */
WaitForVSYNC(dac);
/* Read the sense line to see what the monitor is driving
* it at.
*/
val = DACCFG_READ(dac, FFBDAC_CFG_MPSENSE);
val = (val & FFBDAC_CFG_MPSENSE_SCL) ? 1 : 0;
/* Stop tristating the SCL pin. */
DACCFG_WRITE(dac, FFBDAC_CFG_MPDATA, 0);
#ifdef MDATA_NEEDS_BLANK
/* Restore UCTRL to unblank the screen. */
DACCFG_WRITE(dac, FFBDAC_CFG_UCTRL, uctrl);
#endif
/* Return the result and we're done. */
return val;
}
static void
FFBI2CGetBits(I2CBusPtr b, int *clock, int *data)
{
FFBPtr pFfb = GET_FFB_FROM_SCRN(xf86Screens[b->scrnIndex]);
ffb_dacPtr dac = pFfb->dac;
unsigned int val;
#ifdef MDATA_NEEDS_BLANK
unsigned int uctrl;
#endif
#ifdef MDATA_NEEDS_BLANK
/* Force a blank of the screen. */
uctrl = DACCFG_READ(dac, FFBDAC_CFG_UCTRL);
DACCFG_WRITE(dac, FFBDAC_CFG_UCTRL,
(uctrl | FFBDAC_UCTRL_ABLANK));
#endif
/* Tristate SCL+SDA pins. */
DACCFG_WRITE(dac, FFBDAC_CFG_MPDATA,
(FFBDAC_CFG_MPDATA_SCL | FFBDAC_CFG_MPDATA_SDA));
/* Read the sense line to see what the monitor is driving
* them at.
*/
val = DACCFG_READ(dac, FFBDAC_CFG_MPSENSE);
*clock = (val & FFBDAC_CFG_MPSENSE_SCL) ? 1 : 0;
*data = (val & FFBDAC_CFG_MPSENSE_SDA) ? 1 : 0;
/* Stop tristating the SCL pin. */
DACCFG_WRITE(dac, FFBDAC_CFG_MPDATA, 0);
#ifdef MDATA_NEEDS_BLANK
/* Restore UCTRL to unblank the screen. */
DACCFG_WRITE(dac, FFBDAC_CFG_UCTRL, uctrl);
#endif
}
