oxnas: bring in new oxnas target

Reboot the oxnas target based on Linux 4.14 by rebasing our support on
top of the now-existing upstream kernel support.
This commit brings oxnas support to the level of v4.17 having upstream
drivers for Ethernet, Serial and NAND flash.
Botch up OpenWrt's local drivers for EHCI, SATA and PCIe based on the
new platform code and device-tree.
Re-introduce base-files from old oxnas target which works for now but
needs further clean-up towards generic board support.

Functional issues:
 * PCIe won't come up (hence no USB3 on Shuttle KD20)
 * I2C bus of Akitio myCloud device is likely not to work (missing
   debounce support in new pinctrl driver)

Code-style issues:
 * plla/pllb needs further cleanup -- currently their users or writing
   into the syscon regmap after acquireling the clk instead of using
   defined clk_*_*() functions to setup multipliers and dividors.
 * PCIe phy needs its own little driver.
 * SATA driver is a monster and should be split into an mfd having
   a raidctrl regmap, sata controller, sata ports and sata phy.

Tested on MitraStar STG-212 aka. Medion Akoya MD86xxx and Shuttle KD20.

Signed-off-by: Daniel Golle <daniel@makrotopia.org>

1 files changed, 49 insertions, 0 deletions

diff --git a/target/linux/oxnas/patches-4.14/500-oxnas-sata.patch b/target/linux/oxnas/patches-4.14/500-oxnas-sata.patch
new file mode 100644
index 0000000000..3825ef0acb
--- /dev/null
+++ b/target/linux/oxnas/patches-4.14/500-oxnas-sata.patch
@@ -0,0 +1,49 @@
+--- a/drivers/ata/Kconfig
++++ b/drivers/ata/Kconfig
+@@ -492,6 +492,13 @@ config SATA_VITESSE
+ 
+ 	  If unsure, say N.
+ 
++config SATA_OXNAS
++	tristate "PLXTECH NAS782X SATA support"
++	help
++	  This option enables support for Nas782x Serial ATA controller.
++
++	  If unsure, say N.
++
+ comment "PATA SFF controllers with BMDMA"
+ 
+ config PATA_ALI
+--- a/drivers/ata/Makefile
++++ b/drivers/ata/Makefile
+@@ -46,6 +46,7 @@ obj-$(CONFIG_SATA_SVW)		+= sata_svw.o
+ obj-$(CONFIG_SATA_ULI)		+= sata_uli.o
+ obj-$(CONFIG_SATA_VIA)		+= sata_via.o
+ obj-$(CONFIG_SATA_VITESSE)	+= sata_vsc.o
++obj-$(CONFIG_SATA_OXNAS)	+= sata_oxnas.o
+ 
+ # SFF PATA w/ BMDMA
+ obj-$(CONFIG_PATA_ALI)		+= pata_ali.o
+--- a/arch/arm/boot/dts/ox820.dtsi
++++ b/arch/arm/boot/dts/ox820.dtsi
+@@ -380,5 +380,20 @@
+ 			};
+ 
+ 		};
++
++		sata: sata@45900000 {
++			compatible = "plxtech,nas782x-sata";
++				/*	ports		dmactl		sgdma	*/
++			reg = <0x45900000 0x20000>, <0x459A0000 0x40>, <0x459B0000 0x20>,
++				/*	core		phy		descriptors (optional)	*/
++				<0x459E0000 0x2000>, <0x44900000 0x0C>, <0x50000000 0x1000>;
++			interrupts = <GIC_SPI 18 IRQ_TYPE_LEVEL_HIGH>;
++			clocks = <&stdclk CLK_820_SATA>;
++			resets = <&reset RESET_SATA>, <&reset RESET_SATA_LINK>, <&reset RESET_SATA_PHY>;
++			reset-names = "sata", "link", "phy";
++			nr-ports = <1>;
++			status = "disabled";
++		};
++
+ 	};
+ };