Merge pull request #11 from worproject/dmac

PL330 DMA Controller
worproject · Nov 24, 2023 · 40b5574 · 40b5574
2 parents 900dff9 + 252e58d
commit 40b5574
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diff --git a/build/RockchipDrivers.sln b/build/RockchipDrivers.sln
@@ -9,6 +9,8 @@ Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "rk3xi2c", "..\drivers\i2c\r
 EndProject
 Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "rk3xgpio", "..\drivers\gpio\rk3xgpio\rk3xgpio.vcxproj", "{A80FE9DD-C140-40F6-A3F4-55A2A55BFAD4}"
 EndProject
+Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "pl330dma", "..\drivers\dma\pl330dma\pl330.vcxproj", "{58434B4F-EE73-4D1E-A78D-9FEC5CEC83C7}"
+EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
 		Debug|ARM64 = Debug|ARM64
@@ -33,6 +35,12 @@ Global
 		{A80FE9DD-C140-40F6-A3F4-55A2A55BFAD4}.Release|ARM64.ActiveCfg = Release|ARM64
 		{A80FE9DD-C140-40F6-A3F4-55A2A55BFAD4}.Release|ARM64.Build.0 = Release|ARM64
 		{A80FE9DD-C140-40F6-A3F4-55A2A55BFAD4}.Release|ARM64.Deploy.0 = Release|ARM64
+		{58434B4F-EE73-4D1E-A78D-9FEC5CEC83C7}.Debug|ARM64.ActiveCfg = Debug|ARM64
+		{58434B4F-EE73-4D1E-A78D-9FEC5CEC83C7}.Debug|ARM64.Build.0 = Debug|ARM64
+		{58434B4F-EE73-4D1E-A78D-9FEC5CEC83C7}.Debug|ARM64.Deploy.0 = Debug|ARM64
+		{58434B4F-EE73-4D1E-A78D-9FEC5CEC83C7}.Release|ARM64.ActiveCfg = Release|ARM64
+		{58434B4F-EE73-4D1E-A78D-9FEC5CEC83C7}.Release|ARM64.Build.0 = Release|ARM64
+		{58434B4F-EE73-4D1E-A78D-9FEC5CEC83C7}.Release|ARM64.Deploy.0 = Release|ARM64
 	EndGlobalSection
 	GlobalSection(SolutionProperties) = preSolution
 		HideSolutionNode = FALSE

diff --git a/drivers/dma/LICENSE.txt b/drivers/dma/LICENSE.txt
@@ -0,0 +1,13 @@
+Copyright 2023 CoolStar
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
diff --git a/drivers/dma/README.md b/drivers/dma/README.md
@@ -0,0 +1,3 @@
+ARM PL330 Driver
+
+Tested on RK3588S
diff --git a/drivers/dma/pl330dma/bitops.h b/drivers/dma/pl330dma/bitops.h
@@ -0,0 +1,36 @@
+/**
+ * __ffs - find first bit in word.
+ * @word: The word to search
+ *
+ * Undefined if no bit exists, so code should check against 0 first.
+ */
+static unsigned long __ffs(unsigned long word)
+{
+	int num = 0;
+
+#if BITS_PER_LONG == 64
+	if ((word & 0xffffffff) == 0) {
+		num += 32;
+		word >>= 32;
+	}
+#endif
+	if ((word & 0xffff) == 0) {
+		num += 16;
+		word >>= 16;
+	}
+	if ((word & 0xff) == 0) {
+		num += 8;
+		word >>= 8;
+	}
+	if ((word & 0xf) == 0) {
+		num += 4;
+		word >>= 4;
+	}
+	if ((word & 0x3) == 0) {
+		num += 2;
+		word >>= 2;
+	}
+	if ((word & 0x1) == 0)
+		num += 1;
+	return num;
+}