drm/mgag200: Add support for a new G200eW3 chipset

- Added support for the new deviceID for G200eW3
- Added PLL algorithm for the G200eW3
- Added some initialization code for G200eW3
Signed-off-by: Mathieu Larouche <mathieu.larouche@matrox.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>

drivers/gpu/drm/mgag200/mgag200_drv.c

@@ -35,6 +35,7 @@ static const struct pci_device_id pciidlist[] = {
 	{ PCI_VENDOR_ID_MATROX, 0x532, PCI_ANY_ID, PCI_ANY_ID, 0, 0, G200_WB },
 	{ PCI_VENDOR_ID_MATROX, 0x533, PCI_ANY_ID, PCI_ANY_ID, 0, 0, G200_EH },
 	{ PCI_VENDOR_ID_MATROX, 0x534, PCI_ANY_ID, PCI_ANY_ID, 0, 0, G200_ER },
+	{ PCI_VENDOR_ID_MATROX, 0x536, PCI_ANY_ID, PCI_ANY_ID, 0, 0, G200_EW3 },
 	{0,}
 };
 

drivers/gpu/drm/mgag200/mgag200_drv.h

@@ -180,6 +180,7 @@ enum mga_type {
 	G200_EV,
 	G200_EH,
 	G200_ER,
+	G200_EW3,
 };
 
 #define IS_G200_SE(mdev) (mdev->type == G200_SE_A || mdev->type == G200_SE_B)

drivers/gpu/drm/mgag200/mgag200_i2c.c

@@ -101,6 +101,7 @@ struct mga_i2c_chan *mgag200_i2c_create(struct drm_device *dev)
 	case G200_SE_B:
 	case G200_EV:
 	case G200_WB:
+	case G200_EW3:
 		data = 1;
 		clock = 2;
 		break;

drivers/gpu/drm/mgag200/mgag200_main.c

@@ -82,12 +82,19 @@ static int mga_probe_vram(struct mga_device *mdev, void __iomem *mem)
 	int orig;
 	int test1, test2;
 	int orig1, orig2;
+	unsigned int vram_size;
 
 	/* Probe */
 	orig = ioread16(mem);
 	iowrite16(0, mem);
 
-	for (offset = 0x100000; offset < mdev->mc.vram_window; offset += 0x4000) {
+	vram_size = mdev->mc.vram_window;
+
+	if ((mdev->type == G200_EW3) && (vram_size >= 0x1000000)) {
+		vram_size = vram_size - 0x400000;
+	}
+
+	for (offset = 0x100000; offset < vram_size; offset += 0x4000) {
 		orig1 = ioread8(mem + offset);
 		orig2 = ioread8(mem + offset + 0x100);
 

drivers/gpu/drm/mgag200/mgag200_mode.c

@@ -159,7 +159,7 @@ static int mga_g200wb_set_plls(struct mga_device *mdev, long clock)
 {
 	unsigned int vcomax, vcomin, pllreffreq;
 	unsigned int delta, tmpdelta;
-	unsigned int testp, testm, testn;
+	unsigned int testp, testm, testn, testp2;
 	unsigned int p, m, n;
 	unsigned int computed;
 	int i, j, tmpcount, vcount;
@@ -167,31 +167,71 @@ static int mga_g200wb_set_plls(struct mga_device *mdev, long clock)
 	u8 tmp;
 
 	m = n = p = 0;
-	vcomax = 550000;
-	vcomin = 150000;
-	pllreffreq = 48000;
 
 	delta = 0xffffffff;
 
-	for (testp = 1; testp < 9; testp++) {
-		if (clock * testp > vcomax)
-			continue;
-		if (clock * testp < vcomin)
-			continue;
+	if (mdev->type == G200_EW3) {
+
+		vcomax = 800000;
+		vcomin = 400000;
+		pllreffreq = 25000;
+
+		for (testp = 1; testp < 8; testp++) {
+			for (testp2 = 1; testp2 < 8; testp2++) {
+				if (testp < testp2)
+					continue;
+				if ((clock * testp * testp2) > vcomax)
+					continue;
+				if ((clock * testp * testp2) < vcomin)
+					continue;
+				for (testm = 1; testm < 26; testm++) {
+					for (testn = 32; testn < 2048 ; testn++) {
+						computed = (pllreffreq * testn) /
+							(testm * testp * testp2);
+						if (computed > clock)
+							tmpdelta = computed - clock;
+						else
+							tmpdelta = clock - computed;
+						if (tmpdelta < delta) {
+							delta = tmpdelta;
+							m = ((testn & 0x100) >> 1) |
+								(testm);
+							n = (testn & 0xFF);
+							p = ((testn & 0x600) >> 3) |
+								(testp2 << 3) |
+								(testp);
+						}
+					}
+				}
+			}
+		}
+	} else {
 
-		for (testm = 1; testm < 17; testm++) {
-			for (testn = 1; testn < 151; testn++) {
-				computed = (pllreffreq * testn) /
-					(testm * testp);
-				if (computed > clock)
-					tmpdelta = computed - clock;
-				else
-					tmpdelta = clock - computed;
-				if (tmpdelta < delta) {
-					delta = tmpdelta;
-					n = testn - 1;
-					m = (testm - 1) | ((n >> 1) & 0x80);
-					p = testp - 1;
+		vcomax = 550000;
+		vcomin = 150000;
+		pllreffreq = 48000;
+
+		for (testp = 1; testp < 9; testp++) {
+			if (clock * testp > vcomax)
+				continue;
+			if (clock * testp < vcomin)
+				continue;
+
+			for (testm = 1; testm < 17; testm++) {
+				for (testn = 1; testn < 151; testn++) {
+					computed = (pllreffreq * testn) /
+						(testm * testp);
+					if (computed > clock)
+						tmpdelta = computed - clock;
+					else
+						tmpdelta = clock - computed;
+					if (tmpdelta < delta) {
+						delta = tmpdelta;
+						n = testn - 1;
+						m = (testm - 1) |
+							((n >> 1) & 0x80);
+						p = testp - 1;
+					}
 				}
 			}
 		}
@@ -569,6 +609,7 @@ static int mga_crtc_set_plls(struct mga_device *mdev, long clock)
 		return mga_g200se_set_plls(mdev, clock);
 		break;
 	case G200_WB:
+	case G200_EW3:
 		return mga_g200wb_set_plls(mdev, clock);
 		break;
 	case G200_EV:
@@ -820,6 +861,7 @@ static int mga_crtc_mode_set(struct drm_crtc *crtc,
 		option2 = 0x00008000;
 		break;
 	case G200_WB:
+	case G200_EW3:
 		dacvalue[MGA1064_VREF_CTL] = 0x07;
 		option = 0x41049120;
 		option2 = 0x0000b000;
@@ -875,7 +917,10 @@ static int mga_crtc_mode_set(struct drm_crtc *crtc,
 		if (IS_G200_SE(mdev) &&
 		    ((i == 0x2c) || (i == 0x2d) || (i == 0x2e)))
 			continue;
-		if ((mdev->type == G200_EV || mdev->type == G200_WB || mdev->type == G200_EH) &&
+		if ((mdev->type == G200_EV ||
+		    mdev->type == G200_WB ||
+		    mdev->type == G200_EH ||
+		    mdev->type == G200_EW3) &&
 		    (i >= 0x44) && (i <= 0x4e))
 			continue;
 
@@ -977,7 +1022,7 @@ static int mga_crtc_mode_set(struct drm_crtc *crtc,
 	else
 		ext_vga[3] = ((1 << bppshift) - 1) | 0x80;
 	ext_vga[4] = 0;
-	if (mdev->type == G200_WB)
+	if (mdev->type == G200_WB || mdev->type == G200_EW3)
 		ext_vga[1] |= 0x88;
 
 	/* Set pixel clocks */
@@ -993,6 +1038,9 @@ static int mga_crtc_mode_set(struct drm_crtc *crtc,
 	if (mdev->type == G200_ER)
 		WREG_ECRT(0x24, 0x5);
 
+	if (mdev->type == G200_EW3)
+		WREG_ECRT(0x34, 0x5);
+
 	if (mdev->type == G200_EV) {
 		WREG_ECRT(6, 0);
 	}
@@ -1205,7 +1253,7 @@ static void mga_crtc_prepare(struct drm_crtc *crtc)
 		WREG_SEQ(1, tmp | 0x20);
 	}
 
-	if (mdev->type == G200_WB)
+	if (mdev->type == G200_WB || mdev->type == G200_EW3)
 		mga_g200wb_prepare(crtc);
 
 	WREG_CRT(17, 0);
@@ -1222,7 +1270,7 @@ static void mga_crtc_commit(struct drm_crtc *crtc)
 	const struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private;
 	u8 tmp;
 
-	if (mdev->type == G200_WB)
+	if (mdev->type == G200_WB || mdev->type == G200_EW3)
 		mga_g200wb_commit(crtc);
 
 	if (mdev->type == G200_SE_A || mdev->type == G200_SE_B) {