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Diffstat (limited to 'contrib/vidix/drivers/sis_bridge.c')
-rw-r--r--contrib/vidix/drivers/sis_bridge.c835
1 files changed, 835 insertions, 0 deletions
diff --git a/contrib/vidix/drivers/sis_bridge.c b/contrib/vidix/drivers/sis_bridge.c
new file mode 100644
index 000000000..f6916ae87
--- /dev/null
+++ b/contrib/vidix/drivers/sis_bridge.c
@@ -0,0 +1,835 @@
+/**
+ Video bridge detection for SiS 300 and 310/325 series chips.
+
+ Copyright 2003 Jake Page, Sugar Media.
+
+ Based on SiS Xv driver:
+ Copyright 2002-2003 by Thomas Winischhofer, Vienna, Austria.
+
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 2 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program; if not, write to the Free Software
+ Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+
+**/
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+
+#include "libdha.h"
+
+#include "sis_regs.h"
+#include "sis_defs.h"
+
+void sis_init_video_bridge(void);
+
+static void sis_ddc2_delay(unsigned short delaytime)
+{
+ unsigned short i;
+ int temp;
+
+ for (i = 0; i < delaytime; i++) {
+ inSISIDXREG(SISSR, 0x05, temp);
+ }
+}
+
+
+static int sis_do_sense(int tempbl, int tempbh, int tempcl, int tempch)
+{
+ int temp;
+
+ outSISIDXREG(SISPART4, 0x11, tempbl);
+ temp = tempbh | tempcl;
+ setSISIDXREG(SISPART4, 0x10, 0xe0, temp);
+ //usleep(200000);
+ sis_ddc2_delay(0x1000);
+ tempch &= 0x7f;
+ inSISIDXREG(SISPART4, 0x03, temp);
+ temp ^= 0x0e;
+ temp &= tempch;
+ return (temp == tempch);
+}
+
+
+/* sense connected devices on 30x bridge */
+static void sis_sense_30x()
+{
+ unsigned char backupP4_0d, backupP2_00, biosflag;
+ unsigned char testsvhs_tempbl, testsvhs_tempbh;
+ unsigned char testsvhs_tempcl, testsvhs_tempch;
+ unsigned char testcvbs_tempbl, testcvbs_tempbh;
+ unsigned char testcvbs_tempcl, testcvbs_tempch;
+ unsigned char testvga2_tempbl, testvga2_tempbh;
+ unsigned char testvga2_tempcl, testvga2_tempch;
+ int myflag, result = 0, i, j, haveresult;
+#if 0
+ unsigned short temp;
+#endif
+
+ inSISIDXREG(SISPART4, 0x0d, backupP4_0d);
+ outSISIDXREG(SISPART4, 0x0d, (backupP4_0d | 0x04));
+
+ inSISIDXREG(SISPART2, 0x00, backupP2_00);
+ outSISIDXREG(SISPART2, 0x00, (backupP2_00 | 0x1c));
+
+ sis_do_sense(0, 0, 0, 0);
+
+ if ((sis_vga_engine == SIS_315_VGA) ||
+ (sis_device_id == DEVICE_SIS_300)) {
+#if 0
+ if (0 /*pSiS->sishw_ext.UseROM */ ) {
+ if (sis_vga_engine == SIS_300_VGA)
+ temp = 0xfe;
+ else {
+ temp = 0xf3;
+ if (sis_device_id == DEVICE_SIS_330)
+ temp = 0x11b;
+ }
+ if (pSiS->BIOS[temp] & 0x08) {
+ if (sis_verbose > 1) {
+ printf
+ ("[SiS] SiS30x: Video bridge has DVI-I TMDS/VGA combo connector\n");
+ }
+ orSISIDXREG(SISCR, 0x32, 0x80);
+ } else {
+ andSISIDXREG(SISCR, 0x32, 0x7f);
+ }
+ }
+#endif
+ }
+
+ if (sis_vga_engine == SIS_300_VGA) {
+ if (0 /*pSiS->sishw_ext.UseROM */ ) {
+#if 0
+ testvga2_tempbh = pSiS->BIOS[0xf9];
+ testvga2_tempbl = pSiS->BIOS[0xf8];
+ testsvhs_tempbh = pSiS->BIOS[0xfb];
+ testsvhs_tempbl = pSiS->BIOS[0xfa];
+ testcvbs_tempbh = pSiS->BIOS[0xfd];
+ testcvbs_tempbl = pSiS->BIOS[0xfc];
+ biosflag = pSiS->BIOS[0xfe];
+#endif
+ } else {
+ testvga2_tempbh = 0x00;
+ testvga2_tempbl = 0xd1;
+ testsvhs_tempbh = 0x00;
+ testsvhs_tempbl = 0xb9;
+ testcvbs_tempbh = 0x00;
+ testcvbs_tempbl = 0xb3;
+ biosflag = 0;
+ }
+ if (sis_vbflags & (VB_301B | VB_302B | VB_301LV | VB_302LV)) {
+ testvga2_tempbh = 0x01;
+ testvga2_tempbl = 0x90;
+ testsvhs_tempbh = 0x01;
+ testsvhs_tempbl = 0x6b;
+ testcvbs_tempbh = 0x01;
+ testcvbs_tempbl = 0x74;
+ }
+ inSISIDXREG(SISPART4, 0x01, myflag);
+ if (myflag & 0x04) {
+ testvga2_tempbh = 0x00;
+ testvga2_tempbl = 0xfd;
+ testsvhs_tempbh = 0x00;
+ testsvhs_tempbl = 0xdd;
+ testcvbs_tempbh = 0x00;
+ testcvbs_tempbl = 0xee;
+ }
+ testvga2_tempch = 0x0e;
+ testvga2_tempcl = 0x08;
+ testsvhs_tempch = 0x06;
+ testsvhs_tempcl = 0x04;
+ testcvbs_tempch = 0x08;
+ testcvbs_tempcl = 0x04;
+
+ if (sis_device_id == DEVICE_SIS_300) {
+ inSISIDXREG(SISSR, 0x3b, myflag);
+ if (!(myflag & 0x01)) {
+ testvga2_tempbh = 0x00;
+ testvga2_tempbl = 0x00;
+ testvga2_tempch = 0x00;
+ testvga2_tempcl = 0x00;
+ }
+ }
+ } else {
+ if (0 /*pSiS->sishw_ext.UseROM */ ) {
+#if 0
+ if (sis_device_id == DEVICE_SIS_330) {
+ testvga2_tempbh = pSiS->BIOS[0xe6];
+ testvga2_tempbl = pSiS->BIOS[0xe5];
+ testsvhs_tempbh = pSiS->BIOS[0xe8];
+ testsvhs_tempbl = pSiS->BIOS[0xe7];
+ testcvbs_tempbh = pSiS->BIOS[0xea];
+ testcvbs_tempbl = pSiS->BIOS[0xe9];
+ biosflag = pSiS->BIOS[0x11b];
+ } else {
+ testvga2_tempbh = pSiS->BIOS[0xbe];
+ testvga2_tempbl = pSiS->BIOS[0xbd];
+ testsvhs_tempbh = pSiS->BIOS[0xc0];
+ testsvhs_tempbl = pSiS->BIOS[0xbf];
+ testcvbs_tempbh = pSiS->BIOS[0xc2];
+ testcvbs_tempbl = pSiS->BIOS[0xc1];
+ biosflag = pSiS->BIOS[0xf3];
+ }
+#endif
+ } else {
+ testvga2_tempbh = 0x00;
+ testvga2_tempbl = 0xd1;
+ testsvhs_tempbh = 0x00;
+ testsvhs_tempbl = 0xb9;
+ testcvbs_tempbh = 0x00;
+ testcvbs_tempbl = 0xb3;
+ biosflag = 0;
+ }
+
+ if (sis_vbflags & (VB_301B | VB_302B | VB_301LV | VB_302LV)) {
+ if (0 /*pSiS->sishw_ext.UseROM */ ) {
+#if 0
+ if (sis_device_id == DEVICE_SIS_330) {
+ testvga2_tempbh = pSiS->BIOS[0xec];
+ testvga2_tempbl = pSiS->BIOS[0xeb];
+ testsvhs_tempbh = pSiS->BIOS[0xee];
+ testsvhs_tempbl = pSiS->BIOS[0xed];
+ testcvbs_tempbh = pSiS->BIOS[0xf0];
+ testcvbs_tempbl = pSiS->BIOS[0xef];
+ } else {
+ testvga2_tempbh = pSiS->BIOS[0xc4];
+ testvga2_tempbl = pSiS->BIOS[0xc3];
+ testsvhs_tempbh = pSiS->BIOS[0xc6];
+ testsvhs_tempbl = pSiS->BIOS[0xc5];
+ testcvbs_tempbh = pSiS->BIOS[0xc8];
+ testcvbs_tempbl = pSiS->BIOS[0xc7];
+ }
+#endif
+ } else {
+ if (sis_vbflags & (VB_301B | VB_302B)) {
+ testvga2_tempbh = 0x01;
+ testvga2_tempbl = 0x90;
+ testsvhs_tempbh = 0x01;
+ testsvhs_tempbl = 0x6b;
+ testcvbs_tempbh = 0x01;
+ testcvbs_tempbl = 0x74;
+ } else {
+ testvga2_tempbh = 0x00;
+ testvga2_tempbl = 0x00;
+ testsvhs_tempbh = 0x02;
+ testsvhs_tempbl = 0x00;
+ testcvbs_tempbh = 0x01;
+ testcvbs_tempbl = 0x00;
+ }
+ }
+ }
+ if (sis_vbflags & (VB_301 | VB_301B | VB_302B)) {
+ inSISIDXREG(SISPART4, 0x01, myflag);
+ if (myflag & 0x04) {
+ testvga2_tempbh = 0x00;
+ testvga2_tempbl = 0xfd;
+ testsvhs_tempbh = 0x00;
+ testsvhs_tempbl = 0xdd;
+ testcvbs_tempbh = 0x00;
+ testcvbs_tempbl = 0xee;
+ }
+ }
+ if (sis_vbflags & (VB_301LV | VB_302LV)) {
+ /* TW: No VGA2 or SCART on LV bridges */
+ testvga2_tempbh = 0x00;
+ testvga2_tempbl = 0x00;
+ testvga2_tempch = 0x00;
+ testvga2_tempcl = 0x00;
+ testsvhs_tempch = 0x04;
+ testsvhs_tempcl = 0x08;
+ testcvbs_tempch = 0x08;
+ testcvbs_tempcl = 0x08;
+ } else {
+ testvga2_tempch = 0x0e;
+ testvga2_tempcl = 0x08;
+ testsvhs_tempch = 0x06;
+ testsvhs_tempcl = 0x04;
+ testcvbs_tempch = 0x08;
+ testcvbs_tempcl = 0x04;
+ }
+ }
+
+ /* XXX: ?? andSISIDXREG(SISCR, 0x32, ~0x14); */
+ /* pSiS->postVBCR32 &= ~0x14; */
+
+ /* scan for VGA2/SCART */
+ if (testvga2_tempch || testvga2_tempcl ||
+ testvga2_tempbh || testvga2_tempbl) {
+
+ haveresult = 0;
+ for (j = 0; j < 10; j++) {
+ result = 0;
+ for (i = 0; i < 3; i++) {
+ if (sis_do_sense(testvga2_tempbl, testvga2_tempbh,
+ testvga2_tempcl, testvga2_tempch))
+ result++;
+ }
+ if ((result == 0) || (result >= 2))
+ break;
+ }
+ if (result) {
+ if (biosflag & 0x01) {
+ if (sis_verbose > 1) {
+ printf
+ ("[SiS] SiS30x: Detected TV connected to SCART output\n");
+ }
+ sis_vbflags |= TV_SCART;
+ orSISIDXREG(SISCR, 0x32, 0x04);
+ /*pSiS->postVBCR32 |= 0x04; */
+ } else {
+ if (sis_verbose > 1) {
+ printf
+ ("[SiS] SiS30x: Detected secondary VGA connection\n");
+ }
+ sis_vbflags |= VGA2_CONNECTED;
+ orSISIDXREG(SISCR, 0x32, 0x10);
+ /*pSiS->postVBCR32 |= 0x10; */
+ }
+ }
+ }
+
+ /* scanning for TV */
+
+ /* XXX: ?? andSISIDXREG(SISCR, 0x32, ~0x03); */
+ /* pSiS->postVBCR32 &= ~0x03; */
+
+ result = sis_do_sense(testsvhs_tempbl, testsvhs_tempbh,
+ testsvhs_tempcl, testsvhs_tempch);
+
+
+ haveresult = 0;
+ for (j = 0; j < 10; j++) {
+ result = 0;
+ for (i = 0; i < 3; i++) {
+ if (sis_do_sense(testsvhs_tempbl, testsvhs_tempbh,
+ testsvhs_tempcl, testsvhs_tempch))
+ result++;
+ }
+ if ((result == 0) || (result >= 2))
+ break;
+ }
+ if (result) {
+ if (sis_verbose > 1) {
+ printf
+ ("[SiS] SiS30x: Detected TV connected to SVIDEO output\n");
+ }
+ /* TW: So we can be sure that there IS a SVIDEO output */
+ sis_vbflags |= TV_SVIDEO;
+ orSISIDXREG(SISCR, 0x32, 0x02);
+ //pSiS->postVBCR32 |= 0x02;
+ }
+
+ if ((biosflag & 0x02) || (!(result))) {
+ haveresult = 0;
+ for (j = 0; j < 10; j++) {
+ result = 0;
+ for (i = 0; i < 3; i++) {
+ if (sis_do_sense(testcvbs_tempbl, testcvbs_tempbh,
+ testcvbs_tempcl, testcvbs_tempch))
+ result++;
+ }
+ if ((result == 0) || (result >= 2))
+ break;
+ }
+ if (result) {
+ if (sis_verbose > 1) {
+ printf
+ ("[SiS] SiS30x: Detected TV connected to COMPOSITE output\n");
+ }
+ sis_vbflags |= TV_AVIDEO;
+ orSISIDXREG(SISCR, 0x32, 0x01);
+ //pSiS->postVBCR32 |= 0x01;
+ }
+ }
+
+ sis_do_sense(0, 0, 0, 0);
+
+ outSISIDXREG(SISPART2, 0x00, backupP2_00);
+ outSISIDXREG(SISPART4, 0x0d, backupP4_0d);
+}
+
+
+static void sis_detect_crt1()
+{
+ unsigned char CR32;
+ unsigned char CRT1Detected = 0;
+ unsigned char OtherDevices = 0;
+
+ if (!(sis_vbflags & VB_VIDEOBRIDGE)) {
+ sis_crt1_off = 0;
+ return;
+ }
+
+ inSISIDXREG(SISCR, 0x32, CR32);
+
+ if (CR32 & 0x20)
+ CRT1Detected = 1;
+ if (CR32 & 0x5F)
+ OtherDevices = 1;
+
+ if (sis_crt1_off == -1) {
+ if (!CRT1Detected) {
+ /* BIOS detected no CRT1. */
+ /* If other devices exist, switch it off */
+ if (OtherDevices)
+ sis_crt1_off = 1;
+ else
+ sis_crt1_off = 0;
+ } else {
+ /* BIOS detected CRT1, leave/switch it on */
+ sis_crt1_off = 0;
+ }
+ }
+ if (sis_verbose > 0) {
+ printf("[SiS] %sCRT1 connection detected\n",
+ sis_crt1_off ? "No " : "");
+ }
+}
+
+#if 0 /* not used yet */
+static void sis_detect_lcd()
+{
+ unsigned char CR32;
+#if 0
+ /* not supported yet? */
+ unsigned char CR36, CR37;
+#endif
+
+ if (!(sis_vbflags & VB_VIDEOBRIDGE)) {
+ return;
+ }
+
+ inSISIDXREG(SISCR, 0x32, CR32);
+
+ if (CR32 & 0x08)
+ sis_vbflags |= CRT2_LCD;
+
+ /* DDC detection of LCD - not supported yet */
+
+ /* Get other misc info about LCD - not supported */
+}
+#endif
+
+static void sis_detect_tv()
+{
+ unsigned char SR16, SR38, CR32, CR38 = 0, CR79;
+ int temp = 0;
+
+ if (!(sis_vbflags & VB_VIDEOBRIDGE))
+ return;
+
+ inSISIDXREG(SISCR, 0x32, CR32);
+ inSISIDXREG(SISSR, 0x16, SR16);
+ inSISIDXREG(SISSR, 0x38, SR38);
+ switch (sis_vga_engine) {
+ case SIS_300_VGA:
+ if (sis_device_id == DEVICE_SIS_630_VGA)
+ temp = 0x35;
+ break;
+ case SIS_315_VGA:
+ temp = 0x38;
+ break;
+ }
+ if (temp) {
+ inSISIDXREG(SISCR, temp, CR38);
+ }
+
+ if (CR32 & 0x47)
+ sis_vbflags |= CRT2_TV;
+
+ if (CR32 & 0x04)
+ sis_vbflags |= TV_SCART;
+ else if (CR32 & 0x02)
+ sis_vbflags |= TV_SVIDEO;
+ else if (CR32 & 0x01)
+ sis_vbflags |= TV_AVIDEO;
+ else if (CR32 & 0x40)
+ sis_vbflags |= (TV_SVIDEO | TV_HIVISION);
+ else if ((CR38 & 0x04) && (sis_vbflags & (VB_301LV | VB_302LV)))
+ sis_vbflags |= TV_HIVISION_LV;
+ else if ((CR38 & 0x04) && (sis_vbflags & VB_CHRONTEL))
+ sis_vbflags |= (TV_CHSCART | TV_PAL);
+ else if ((CR38 & 0x08) && (sis_vbflags & VB_CHRONTEL))
+ sis_vbflags |= (TV_CHHDTV | TV_NTSC);
+
+ if (sis_vbflags & (TV_SCART | TV_SVIDEO | TV_AVIDEO | TV_HIVISION)) {
+ if (sis_vga_engine == SIS_300_VGA) {
+ /* TW: Should be SR38 here as well, but this
+ * does not work. Looks like a BIOS bug (2.04.5c).
+ */
+ if (SR16 & 0x20)
+ sis_vbflags |= TV_PAL;
+ else
+ sis_vbflags |= TV_NTSC;
+ } else if ((sis_device_id == DEVICE_SIS_550_VGA)) {
+ inSISIDXREG(SISCR, 0x79, CR79);
+ if (CR79 & 0x08) {
+ inSISIDXREG(SISCR, 0x79, CR79);
+ CR79 >>= 5;
+ }
+ if (CR79 & 0x01) {
+ sis_vbflags |= TV_PAL;
+ if (CR38 & 0x40)
+ sis_vbflags |= TV_PALM;
+ else if (CR38 & 0x80)
+ sis_vbflags |= TV_PALN;
+ } else
+ sis_vbflags |= TV_NTSC;
+ } else if ((sis_device_id == DEVICE_SIS_650_VGA)) {
+ inSISIDXREG(SISCR, 0x79, CR79);
+ if (CR79 & 0x20) {
+ sis_vbflags |= TV_PAL;
+ if (CR38 & 0x40)
+ sis_vbflags |= TV_PALM;
+ else if (CR38 & 0x80)
+ sis_vbflags |= TV_PALN;
+ } else
+ sis_vbflags |= TV_NTSC;
+ } else { /* 315, 330 */
+ if (SR38 & 0x01) {
+ sis_vbflags |= TV_PAL;
+ if (CR38 & 0x40)
+ sis_vbflags |= TV_PALM;
+ else if (CR38 & 0x80)
+ sis_vbflags |= TV_PALN;
+ } else
+ sis_vbflags |= TV_NTSC;
+ }
+ }
+
+ if (sis_vbflags &
+ (TV_SCART | TV_SVIDEO | TV_AVIDEO | TV_HIVISION | TV_CHSCART |
+ TV_CHHDTV)) {
+ if (sis_verbose > 0) {
+ printf("[SiS] %sTV standard %s\n",
+ (sis_vbflags & (TV_CHSCART | TV_CHHDTV)) ? "Using " :
+ "Detected default ",
+ (sis_vbflags & TV_NTSC) ? ((sis_vbflags & TV_CHHDTV) ?
+ "480i HDTV" : "NTSC")
+ : ((sis_vbflags & TV_PALM) ? "PALM"
+ : ((sis_vbflags & TV_PALN) ? "PALN" : "PAL")));
+ }
+ }
+
+}
+
+
+static void sis_detect_crt2()
+{
+ unsigned char CR32;
+
+ if (!(sis_vbflags & VB_VIDEOBRIDGE))
+ return;
+
+ /* CRT2-VGA not supported on LVDS and 30xLV */
+ if (sis_vbflags & (VB_LVDS | VB_301LV | VB_302LV))
+ return;
+
+ inSISIDXREG(SISCR, 0x32, CR32);
+
+ if (CR32 & 0x10)
+ sis_vbflags |= CRT2_VGA;
+
+#if 0
+ if (!(pSiS->nocrt2ddcdetection)) {
+ if (sis_vbflags & (VB_301B | VB_302B)) {
+ if (!(sis_vbflags & (CRT2_VGA | CRT2_LCD))) {
+ printf
+ ("[SiS] BIOS detected no secondary VGA, sensing via DDC\n");
+ if (SiS_SenseVGA2DDC(pSiS->SiS_Pr, pSiS)) {
+ printf
+ ("[SiS] DDC error during secondary VGA detection\n");
+ } else {
+ inSISIDXREG(SISCR, 0x32, CR32);
+ if (CR32 & 0x10) {
+ sis_vbflags |= CRT2_VGA;
+ /*pSiS->postVBCR32 |= 0x10; */
+ printf
+ ("[SiS] Detected secondary VGA connection\n");
+ } else {
+ printf
+ ("[SiS] No secondary VGA connection detected\n");
+ }
+ }
+ }
+ }
+ }
+#endif
+
+}
+
+
+/* Preinit: detect video bridge and sense connected devs */
+static void sis_detect_video_bridge()
+{
+ int temp, temp1, temp2;
+
+
+ sis_vbflags = 0;
+
+ if (sis_vga_engine != SIS_300_VGA && sis_vga_engine != SIS_315_VGA)
+ return;
+
+ inSISIDXREG(SISPART4, 0x00, temp);
+ temp &= 0x0F;
+ if (temp == 1) {
+ inSISIDXREG(SISPART4, 0x01, temp1);
+ temp1 &= 0xff;
+ if (temp1 >= 0xE0) {
+ sis_vbflags |= VB_302LV;
+ //pSiS->sishw_ext.ujVBChipID = VB_CHIP_302LV;
+ if (sis_verbose > 1) {
+ printf
+ ("[SiS] Detected SiS302LV video bridge (ID 1; Revision 0x%x)\n",
+ temp1);
+ }
+
+ } else if (temp1 >= 0xD0) {
+ sis_vbflags |= VB_301LV;
+ //pSiS->sishw_ext.ujVBChipID = VB_CHIP_301LV;
+ if (sis_verbose > 1) {
+ printf
+ ("[SiS] Detected SiS301LV video bridge (ID 1; Revision 0x%x)\n",
+ temp1);
+ }
+ } else if (temp1 >= 0xB0) {
+ sis_vbflags |= VB_301B;
+ //pSiS->sishw_ext.ujVBChipID = VB_CHIP_301B;
+ inSISIDXREG(SISPART4, 0x23, temp2);
+ if (!(temp2 & 0x02))
+ sis_vbflags |= VB_30xBDH;
+ if (sis_verbose > 1) {
+ printf
+ ("[SiS] Detected SiS301B%s video bridge (Revision 0x%x)\n",
+ (temp2 & 0x02) ? "" : " (DH)", temp1);
+ }
+ } else {
+ sis_vbflags |= VB_301;
+ //pSiS->sishw_ext.ujVBChipID = VB_CHIP_301;
+ if (sis_verbose > 1) {
+ printf
+ ("[SiS] Detected SiS301 video bridge (Revision 0x%x)\n",
+ temp1);
+ }
+ }
+
+ sis_sense_30x();
+
+ } else if (temp == 2) {
+
+ inSISIDXREG(SISPART4, 0x01, temp1);
+ temp1 &= 0xff;
+ if (temp1 >= 0xE0) {
+ sis_vbflags |= VB_302LV;
+ //pSiS->sishw_ext.ujVBChipID = VB_CHIP_302LV;
+ if (sis_verbose > 1) {
+ printf
+ ("[SiS] Detected SiS302LV video bridge (ID 2; Revision 0x%x)\n",
+ temp1);
+ }
+ } else if (temp1 >= 0xD0) {
+ sis_vbflags |= VB_301LV;
+ //pSiS->sishw_ext.ujVBChipID = VB_CHIP_301LV;
+ if (sis_verbose > 1) {
+ printf
+ ("[SiS] Detected SiS301LV video bridge (ID 2; Revision 0x%x)\n",
+ temp1);
+ }
+ } else {
+ sis_vbflags |= VB_302B;
+ //pSiS->sishw_ext.ujVBChipID = VB_CHIP_302B;
+ inSISIDXREG(SISPART4, 0x23, temp2);
+ if (!(temp & 0x02))
+ sis_vbflags |= VB_30xBDH;
+ if (sis_verbose > 1) {
+ printf
+ ("[SiS] Detected SiS302B%s video bridge (Revision 0x%x)\n",
+ (temp2 & 0x02) ? "" : " (DH)", temp1);
+ }
+ }
+
+ sis_sense_30x();
+
+ } else if (temp == 3) {
+ if (sis_verbose > 1) {
+ printf("[SiS] Detected SiS303 video bridge - not supported\n");
+ }
+ } else {
+ /* big scary mess of code to handle unknown or Chrontel LVDS */
+ /* skipping it for now */
+ if (sis_verbose > 1) {
+ printf
+ ("[SiS] Detected Chrontel video bridge - not supported\n");
+ }
+ }
+
+ /* this is probably not relevant to video overlay driver... */
+ /* detects if brdige uses LCDA for low res text modes */
+ if (sis_vga_engine == SIS_315_VGA) {
+ if (sis_vbflags & (VB_302B | VB_301LV | VB_302LV)) {
+#if 0
+ if (pSiS->sisfblcda != 0xff) {
+ if ((pSiS->sisfblcda & 0x03) == 0x03) {
+ //pSiS->SiS_Pr->SiS_UseLCDA = TRUE;
+ sis_vbflags |= VB_USELCDA;
+ }
+ } else
+#endif
+ {
+ inSISIDXREG(SISCR, 0x34, temp);
+ if (temp <= 0x13) {
+ inSISIDXREG(SISCR, 0x38, temp);
+ if ((temp & 0x03) == 0x03) {
+ //pSiS->SiS_Pr->SiS_UseLCDA = TRUE;
+ sis_vbflags |= VB_USELCDA;
+ } else {
+ inSISIDXREG(SISCR, 0x30, temp);
+ if (temp & 0x20) {
+ inSISIDXREG(SISPART1, 0x13, temp);
+ if (temp & 0x40) {
+ //pSiS->SiS_Pr->SiS_UseLCDA = TRUE;
+ sis_vbflags |= VB_USELCDA;
+ }
+ }
+ }
+ }
+ }
+ if (sis_vbflags & VB_USELCDA) {
+ /* printf("Bridge uses LCDA for low resolution and text modes\n"); */
+ }
+ }
+ }
+
+
+}
+
+
+/* detect video bridge type and sense connected devices */
+void sis_init_video_bridge()
+{
+
+ sis_detect_video_bridge();
+
+ sis_detect_crt1();
+ //sis_detect_lcd(); /* not fully ready probably */
+ sis_detect_tv();
+ sis_detect_crt2();
+
+ sis_detected_crt2_devices =
+ sis_vbflags & (CRT2_LCD | CRT2_TV | CRT2_VGA);
+
+ // force crt2 type
+ if (sis_force_crt2_type == CRT2_DEFAULT) {
+ if (sis_vbflags & CRT2_VGA)
+ sis_force_crt2_type = CRT2_VGA;
+ else if (sis_vbflags & CRT2_LCD)
+ sis_force_crt2_type = CRT2_LCD;
+ else if (sis_vbflags & CRT2_TV)
+ sis_force_crt2_type = CRT2_TV;
+ }
+
+ switch (sis_force_crt2_type) {
+ case CRT2_TV:
+ sis_vbflags = sis_vbflags & ~(CRT2_LCD | CRT2_VGA);
+ if (sis_vbflags & VB_VIDEOBRIDGE)
+ sis_vbflags = sis_vbflags | CRT2_TV;
+ else
+ sis_vbflags = sis_vbflags & ~(CRT2_TV);
+ break;
+ case CRT2_LCD:
+ sis_vbflags = sis_vbflags & ~(CRT2_TV | CRT2_VGA);
+ if ((sis_vbflags & VB_VIDEOBRIDGE) /* XXX: && (pSiS->VBLCDFlags) */
+ )
+ sis_vbflags = sis_vbflags | CRT2_LCD;
+ else {
+ sis_vbflags = sis_vbflags & ~(CRT2_LCD);
+ if (sis_verbose > 0) {
+ printf
+ ("[SiS] Can't force CRT2 to LCD, no panel detected\n");
+ }
+ }
+ break;
+ case CRT2_VGA:
+ if (sis_vbflags & VB_LVDS) {
+ if (sis_verbose > 0) {
+ printf("[SiS] LVDS does not support secondary VGA\n");
+ }
+ break;
+ }
+ if (sis_vbflags & (VB_301LV | VB_302LV)) {
+ if (sis_verbose > 0) {
+ printf
+ ("[SiS] SiS30xLV bridge does not support secondary VGA\n");
+ }
+ break;
+ }
+ sis_vbflags = sis_vbflags & ~(CRT2_TV | CRT2_LCD);
+ if (sis_vbflags & VB_VIDEOBRIDGE)
+ sis_vbflags = sis_vbflags | CRT2_VGA;
+ else
+ sis_vbflags = sis_vbflags & ~(CRT2_VGA);
+ break;
+ default:
+ sis_vbflags &= ~(CRT2_TV | CRT2_LCD | CRT2_VGA);
+ }
+
+ /* CRT2 gamma correction?? */
+
+ /* other force modes: */
+ /* have a 'force tv type' (svideo, composite, scart) option? */
+ /* have a 'force crt1 type' (to turn it off, etc??) */
+
+ /* TW: Check if CRT1 used (or needed; this eg. if no CRT2 detected) */
+ if (sis_vbflags & VB_VIDEOBRIDGE) {
+
+ /* TW: No CRT2 output? Then we NEED CRT1!
+ * We also need CRT1 if depth = 8 and bridge=LVDS|630+301B
+ */
+ if ((!(sis_vbflags & (CRT2_VGA | CRT2_LCD | CRT2_TV))) || ( /*(pScrn->bitsPerPixel == 8) && */
+ ((sis_vbflags & (VB_LVDS | VB_CHRONTEL)) || ((sis_vga_engine == SIS_300_VGA) && (sis_vbflags & VB_301B))))) {
+ sis_crt1_off = 0;
+ }
+ /* TW: No CRT2 output? Then we can't use hw overlay on CRT2 */
+ if (!(sis_vbflags & (CRT2_VGA | CRT2_LCD | CRT2_TV)))
+ sis_overlay_on_crt1 = 1;
+
+ } else { /* TW: no video bridge? */
+
+ /* Then we NEED CRT1... */
+ sis_crt1_off = 0;
+ /* ... and can't use CRT2 for overlay output */
+ sis_overlay_on_crt1 = 1;
+ }
+
+ /* tvstandard options ? */
+
+ // determine using CRT1 or CRT2?
+ /* -> NO dualhead right now... */
+ if (sis_vbflags & DISPTYPE_DISP2) {
+ if (sis_crt1_off) {
+ sis_vbflags |= VB_DISPMODE_SINGLE;
+ /* TW: No CRT1? Then we use the video overlay on CRT2 */
+ sis_overlay_on_crt1 = 0;
+ } else /* TW: CRT1 and CRT2 - mirror or dual head ----- */
+ sis_vbflags |= (VB_DISPMODE_MIRROR | DISPTYPE_CRT1);
+ } else { /* TW: CRT1 only ------------------------------- */
+ sis_vbflags |= (VB_DISPMODE_SINGLE | DISPTYPE_CRT1);
+ }
+
+ if (sis_verbose > 0) {
+ printf("[SiS] Using hardware overlay on CRT%d\n",
+ sis_overlay_on_crt1 ? 1 : 2);
+ }
+
+}
generated by cgit v1.2.3 (git 2.25.1) at 2025-04-25 18:06:44 +0000