From d09f463a5d1ce73e0b65d5276fbcca393fa2da46 Mon Sep 17 00:00:00 2001
From: Kaleb Keithley <kaleb@freedesktop.org>
Date: Fri, 14 Nov 2003 16:48:55 +0000
Subject: Initial revision

---
 src/atimach64io.c | 100 ++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 100 insertions(+)
 create mode 100644 src/atimach64io.c

(limited to 'src/atimach64io.c')

diff --git a/src/atimach64io.c b/src/atimach64io.c
new file mode 100644
index 00000000..3197f3ca
--- /dev/null
+++ b/src/atimach64io.c
@@ -0,0 +1,100 @@
+/* $XFree86: xc/programs/Xserver/hw/xfree86/drivers/ati/atimach64io.c,v 1.5 2003/01/01 19:16:32 tsi Exp $ */
+/*
+ * Copyright 2000 through 2003 by Marc Aurele La France (TSI @ UQV), tsi@xfree86.org
+ *
+ * Permission to use, copy, modify, distribute, and sell this software and its
+ * documentation for any purpose is hereby granted without fee, provided that
+ * the above copyright notice appear in all copies and that both that copyright
+ * notice and this permission notice appear in supporting documentation, and
+ * that the name of Marc Aurele La France not be used in advertising or
+ * publicity pertaining to distribution of the software without specific,
+ * written prior permission.  Marc Aurele La France makes no representations
+ * about the suitability of this software for any purpose.  It is provided
+ * "as-is" without express or implied warranty.
+ *
+ * MARC AURELE LA FRANCE DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
+ * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS.  IN NO
+ * EVENT SHALL MARC AURELE LA FRANCE BE LIABLE FOR ANY SPECIAL, INDIRECT OR
+ * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
+ * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
+ * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
+ * PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#include "ati.h"
+#include "atichip.h"
+#include "atimach64io.h"
+
+/*
+ * ATIAccessMach64PLLReg --
+ *
+ * This function sets up the addressing required to access, for read or write,
+ * a 264xT's PLL registers.
+ */
+void
+ATIAccessMach64PLLReg
+(
+    ATIPtr      pATI,
+    const CARD8 Index,
+    const Bool  Write
+)
+{
+    CARD8 clock_cntl1 = in8(CLOCK_CNTL + 1) &
+        ~GetByte(PLL_WR_EN | PLL_ADDR, 1);
+
+    /* Set PLL register to be read or written */
+    out8(CLOCK_CNTL + 1, clock_cntl1 |
+        GetByte(SetBits(Index, PLL_ADDR) | SetBits(Write, PLL_WR_EN), 1));
+}
+
+/*
+ * ATIMach64PollEngineStatus --
+ *
+ * This function refreshes the driver's view of the draw engine's status.  This
+ * has been moved into a separate compilation unit to prevent inlining.
+ */
+void
+ATIMach64PollEngineStatus
+(
+    ATIPtr pATI
+)
+{
+    CARD32 IOValue;
+    int    Count;
+
+    if (pATI->Chip < ATI_CHIP_264VTB)
+    {
+        /*
+         * TODO:  Deal with locked engines.
+         */
+        IOValue = inm(FIFO_STAT);
+        pATI->EngineIsLocked = GetBits(IOValue, FIFO_ERR);
+
+        /*
+         * The following counts the number of bits in FIFO_STAT_BITS, and is
+         * derived from miSetVisualTypes() (formerly cfbSetVisualTypes()).
+         */
+        IOValue = GetBits(IOValue, FIFO_STAT_BITS);
+        Count = (IOValue >> 1) & 0x36DBU;
+        Count = IOValue - Count - ((Count >> 1) & 0x36DBU);
+        Count = ((Count + (Count >> 3)) & 0x71C7U) % 0x3FU;
+        Count = pATI->nFIFOEntries - Count;
+        if (Count > pATI->nAvailableFIFOEntries)
+            pATI->nAvailableFIFOEntries = Count;
+
+        /*
+         * If the command FIFO is non-empty, then the engine isn't idle.
+         */
+        if (pATI->nAvailableFIFOEntries < pATI->nFIFOEntries)
+        {
+            pATI->EngineIsBusy = TRUE;
+            return;
+        }
+    }
+
+    IOValue = inm(GUI_STAT);
+    pATI->EngineIsBusy = GetBits(IOValue, GUI_ACTIVE);
+    Count = GetBits(IOValue, GUI_FIFO);
+    if (Count > pATI->nAvailableFIFOEntries)
+        pATI->nAvailableFIFOEntries = Count;
+}
-- 
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