added via accelerant, a copy of skeleton driver yet.

git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@13585 a95241bf-73f2-0310-859d-f6bbb57e9c96
2005-07-10 17:45:55 +00:00
parent b69daae506
commit 35bf20db0f
1 changed files with 161 additions and 0 deletions
@@ -0,0 +1,161 @@
+/*
+	Copyright 1999, Be Incorporated.   All Rights Reserved.
+	This file may be used under the terms of the Be Sample Code License.
+
+	Other authors:
+	Mark Watson
+	Rudolf Cornelissen 9/2002-5/2003
+*/
+
+#define MODULE_BIT 0x02000000
+
+#include "acc_std.h"
+
+/*
+	Return the current display mode.  The only time you might return an
+	error is if a mode hasn't been set. Or if the system hands you a NULL pointer.
+*/
+status_t GET_DISPLAY_MODE(display_mode *current_mode)
+{
+	/* check for NULL pointer */
+	if (current_mode == NULL) return B_ERROR;
+
+	*current_mode = si->dm;
+	return B_OK;
+}
+
+/* Return the frame buffer configuration information. */
+status_t GET_FRAME_BUFFER_CONFIG(frame_buffer_config *afb)
+{
+	/* check for NULL pointer */
+	if (afb == NULL) return B_ERROR;
+
+	*afb = si->fbc;
+	return B_OK;
+}
+
+/* Return the maximum and minium pixelclock limits for the specified mode. */
+/* NOTE:
+ * Due to BeOS constraints output for all heads will be limited to the head with
+ * the least capabilities. */
+status_t GET_PIXEL_CLOCK_LIMITS(display_mode *dm, uint32 *low, uint32 *high) 
+{
+	uint32 max_pclk = 0;
+	uint32 min_pclk = 0;
+
+	/* check for NULL pointers */
+	if ((dm == NULL) || (low == NULL) || (high == NULL)) return B_ERROR;
+
+	/* specify requested info */
+	if (dm->flags & DUALHEAD_BITS)
+	{
+		/* dualhead mode */
+		/* find min. value */
+		switch (si->ps.card_type)
+		{
+			default:
+				*low = ((si->ps.min_video_vco * 1000) / 16);
+				break;
+		}
+		/* find max. value:
+		 * using decondary DAC specs because they could be narrower (twinview) */
+		switch (dm->space)
+		{
+			case B_CMAP8:
+				max_pclk = si->ps.max_dac2_clock_8;
+				break;
+			case B_RGB15_LITTLE:
+			case B_RGB16_LITTLE:
+				max_pclk = si->ps.max_dac2_clock_16;
+				break;
+			case B_RGB24_LITTLE:
+				max_pclk = si->ps.max_dac2_clock_24;
+				break;
+			case B_RGB32_LITTLE:
+				/* specially noted because of RAM speed constraints! */
+				max_pclk = si->ps.max_dac2_clock_32dh;
+				break;
+			default:
+				/* use fail-safe value */
+				max_pclk = si->ps.max_dac2_clock_32dh;
+				break;
+		}
+		/* return values in kHz */
+		*high = max_pclk * 1000;
+	}
+	else
+	{
+		/* singlehead mode */
+		/* find min. value */
+		switch (si->ps.card_type)
+		{
+			default:
+				*low = ((si->ps.min_pixel_vco * 1000) / 16);
+				break;
+		}
+		/* find max. value: depends on which head is used as primary head */
+		if (!si->ps.crtc2_prim)
+		{
+			switch (dm->space)
+			{
+				case B_CMAP8:
+					max_pclk = si->ps.max_dac1_clock_8;
+					break;
+				case B_RGB15_LITTLE:
+				case B_RGB16_LITTLE:
+					max_pclk = si->ps.max_dac1_clock_16;
+					break;
+				case B_RGB24_LITTLE:
+					max_pclk = si->ps.max_dac1_clock_24;
+					break;
+				case B_RGB32_LITTLE:
+					max_pclk = si->ps.max_dac1_clock_32;
+					break;
+				default:
+					/* use fail-safe value */
+					max_pclk = si->ps.max_dac1_clock_32;
+					break;
+			}
+		}
+		else
+		{
+			switch (dm->space)
+			{
+				case B_CMAP8:
+					max_pclk = si->ps.max_dac2_clock_8;
+					break;
+				case B_RGB15_LITTLE:
+				case B_RGB16_LITTLE:
+					max_pclk = si->ps.max_dac2_clock_16;
+					break;
+				case B_RGB24_LITTLE:
+					max_pclk = si->ps.max_dac2_clock_24;
+					break;
+				case B_RGB32_LITTLE:
+					max_pclk = si->ps.max_dac2_clock_32;
+					break;
+				default:
+					/* use fail-safe value */
+					max_pclk = si->ps.max_dac2_clock_32;
+					break;
+			}
+		}
+		/* return values in kHz */
+		*high = max_pclk * 1000;
+	}
+
+	/* clamp lower limit to 48Hz vertical refresh for now.
+	 * Apparantly the BeOS screenprefs app does limit the upper refreshrate to 90Hz,
+	 * while it does not limit the lower refreshrate. */
+	min_pclk = ((uint32)dm->timing.h_total * (uint32)dm->timing.v_total * 48) / 1000;
+	if (min_pclk > *low) *low = min_pclk;
+
+	return B_OK;
+}
+
+/* Return the semaphore id that will be used to signal a vertical sync occured.  */
+sem_id ACCELERANT_RETRACE_SEMAPHORE(void)
+{
+//	return si->vblank;
+return B_ERROR;
+}