[DM/PCI] Add DesignWare PCIe RC/EP base drivers

Too many PCI controllers base on DesignWare PCIe.
This is a modules.

Signed-off-by: GuEe-GUI <[email protected]>

Author: GuEe-GUI

components/drivers/pci/host/Kconfig

@@ -8,3 +8,5 @@ config RT_PCI_HOST_GENERIC
     depends on RT_PCI_ECAM
     select RT_PCI_HOST_COMMON
     default y
+
+rsource "dw/Kconfig"

components/drivers/pci/host/dw/Kconfig

@@ -0,0 +1,13 @@
+config RT_PCI_DW
+    bool "DesignWare-based PCIe"
+    depends on RT_MFD_SYSCON
+    depends on RT_USING_DMA
+    default n
+
+config RT_PCI_DW_HOST
+    bool
+    depends on RT_PCI_DW
+
+config RT_PCI_DW_EP
+    bool
+    depends on RT_PCI_DW

components/drivers/pci/host/dw/SConscript

@@ -0,0 +1,21 @@
+from building import *
+
+group = []
+
+if not GetDepend(['RT_PCI_DW']):
+    Return('group')
+
+cwd = GetCurrentDir()
+CPPPATH = [cwd + '/../../../include']
+
+src = ['pcie-dw.c', 'pcie-dw_platfrom.c']
+
+if GetDepend(['RT_PCI_DW_HOST']):
+    src += ['pcie-dw_host.c']
+
+if GetDepend(['RT_PCI_DW_EP']):
+    src += ['pcie-dw_ep.c']
+
+group = DefineGroup('DeviceDrivers', src, depend = [''], CPPPATH = CPPPATH)
+
+Return('group')