[mcs814x] add Moschip MSC814x support

This target currently only supports Moschip's MCS8140 SoC, but support
for other chips in the same family (MCS8142, MCS8144) will be easy to add.

Target support is entirely using Device Tree for probing peripherals.
Drivers support include:
- PCI
- USB 1 & 2
- watchdog
- random number generator
- UART
- timer
- internal Ethernet PHY
- Ethernet MAC core

Support for the following boards is included using Device Tree
- Devolo dLAN USB Extender
- Tigal RBT-832

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@32462 3c298f89-4303-0410-b956-a3cf2f4a3e73

8 files changed, 329 insertions, 0 deletions

diff --git a/target/linux/mcs814x/patches-3.3/001-platform.patch b/target/linux/mcs814x/patches-3.3/001-platform.patch
new file mode 100644
index 000000000..dc153a5d4
--- /dev/null
+++ b/target/linux/mcs814x/patches-3.3/001-platform.patch
@@ -0,0 +1,43 @@
+--- a/arch/arm/Kconfig
++++ b/arch/arm/Kconfig
+@@ -869,6 +869,21 @@ config ARCH_EXYNOS
+ 	help
+ 	  Support for SAMSUNG's EXYNOS SoCs (EXYNOS4/5)
+ 
++config ARCH_MCS814X
++	bool "Moschip MCS814x"
++	select CPU_ARM926T
++	select PCI
++	select FIQ
++	select GENERIC_IRQ_CHIP
++	select GENERIC_GPIO
++	select ARCH_REQUIRE_GPIOLIB
++	select CLKDEV_LOOKUP
++	select ARCH_USES_GETTIMEOFFSET
++	select NEED_MACH_MEMORY_H
++	select MULTI_IRQ_HANDLER
++	help
++	  Support for Moschip MCS814x SoCs (MCS8140).
++
+ config ARCH_SHARK
+ 	bool "Shark"
+ 	select CPU_SA110
+@@ -1065,6 +1080,8 @@ source "arch/arm/plat-samsung/Kconfig"
+ source "arch/arm/plat-s3c24xx/Kconfig"
+ source "arch/arm/plat-s5p/Kconfig"
+ 
++source "arch/arm/mach-mcs814x/Kconfig"
++
+ source "arch/arm/plat-spear/Kconfig"
+ 
+ if ARCH_S3C2410
+--- a/arch/arm/Makefile
++++ b/arch/arm/Makefile
+@@ -179,6 +179,7 @@ machine-$(CONFIG_ARCH_S3C64XX)		:= s3c64
+ machine-$(CONFIG_ARCH_S5P64X0)		:= s5p64x0
+ machine-$(CONFIG_ARCH_S5PC100)		:= s5pc100
+ machine-$(CONFIG_ARCH_S5PV210)		:= s5pv210
++machine-$(CONFIG_ARCH_MCS814X)		:= mcs814x
+ machine-$(CONFIG_ARCH_EXYNOS4)		:= exynos
+ machine-$(CONFIG_ARCH_SA1100)		:= sa1100
+ machine-$(CONFIG_ARCH_SHARK)		:= shark
diff --git a/target/linux/mcs814x/patches-3.3/003-ethernet.patch b/target/linux/mcs814x/patches-3.3/003-ethernet.patch
new file mode 100644
index 000000000..ff4faabfb
--- /dev/null
+++ b/target/linux/mcs814x/patches-3.3/003-ethernet.patch
@@ -0,0 +1,16 @@
+--- a/drivers/net/ethernet/Kconfig
++++ b/drivers/net/ethernet/Kconfig
+@@ -176,4 +176,6 @@ source "drivers/net/ethernet/via/Kconfig
+ source "drivers/net/ethernet/xilinx/Kconfig"
+ source "drivers/net/ethernet/xircom/Kconfig"
+ 
++source "drivers/net/ethernet/mcs8140/Kconfig"
++
+ endif # ETHERNET
+--- a/drivers/net/ethernet/Makefile
++++ b/drivers/net/ethernet/Makefile
+@@ -74,3 +74,4 @@ obj-$(CONFIG_NET_VENDOR_TUNDRA) += tundr
+ obj-$(CONFIG_NET_VENDOR_VIA) += via/
+ obj-$(CONFIG_NET_VENDOR_XILINX) += xilinx/
+ obj-$(CONFIG_NET_VENDOR_XIRCOM) += xircom/
++obj-$(CONFIG_NUPORT_ETHERNET_DRIVER) += mcs8140/
diff --git a/target/linux/mcs814x/patches-3.3/004-usb.patch b/target/linux/mcs814x/patches-3.3/004-usb.patch
new file mode 100644
index 000000000..47f747852
--- /dev/null
+++ b/target/linux/mcs814x/patches-3.3/004-usb.patch
@@ -0,0 +1,29 @@
+--- a/drivers/usb/host/ehci-hcd.c
++++ b/drivers/usb/host/ehci-hcd.c
+@@ -1381,6 +1381,11 @@ MODULE_LICENSE ("GPL");
+ #define        PLATFORM_DRIVER         ehci_mv_driver
+ #endif
+ 
++#ifdef CONFIG_ARCH_MCS814X
++#include "ehci-mcs814x.c"
++#define PLATFORM_DRIVER		mcs814x_ehci_driver
++#endif
++
+ #if !defined(PCI_DRIVER) && !defined(PLATFORM_DRIVER) && \
+     !defined(PS3_SYSTEM_BUS_DRIVER) && !defined(OF_PLATFORM_DRIVER) && \
+     !defined(XILINX_OF_PLATFORM_DRIVER)
+--- a/drivers/usb/host/ohci-hcd.c
++++ b/drivers/usb/host/ohci-hcd.c
+@@ -1121,6 +1121,12 @@ MODULE_LICENSE ("GPL");
+ #define PLATFORM_DRIVER		ohci_xls_driver
+ #endif
+ 
++#ifdef CONFIG_ARCH_MCS814X
++#include "ohci-mcs814x.c"
++#define PLATFORM_DRIVER		ohci_hcd_mcs814x_driver
++#endif
++
++
+ #if	!defined(PCI_DRIVER) &&		\
+ 	!defined(PLATFORM_DRIVER) &&	\
+ 	!defined(OMAP1_PLATFORM_DRIVER) &&	\
diff --git a/target/linux/mcs814x/patches-3.3/005-mcs814x_rng.patch b/target/linux/mcs814x/patches-3.3/005-mcs814x_rng.patch
new file mode 100644
index 000000000..7f7ce8e44
--- /dev/null
+++ b/target/linux/mcs814x/patches-3.3/005-mcs814x_rng.patch
@@ -0,0 +1,31 @@
+--- a/drivers/char/hw_random/Kconfig
++++ b/drivers/char/hw_random/Kconfig
+@@ -188,6 +188,18 @@ config HW_RANDOM_TX4939
+ 
+ 	  If unsure, say Y.
+ 
++config HW_RANDOM_MCS814X
++	tristate "Moschip MCS814x Random Number Generator"
++	depends on HW_RANDOM && ARCH_MCS814X
++	---help---
++	  This driver provides kernel-side support for the Random Number
++	  Generator hardware found on Moschip MCS814x processors.
++
++	  To compile this driver as a module, choose M here: the
++	  module will be called mcs814x-rng.
++
++	  If unusure, say Y.
++
+ config HW_RANDOM_MXC_RNGA
+ 	tristate "Freescale i.MX RNGA Random Number Generator"
+ 	depends on HW_RANDOM && ARCH_HAS_RNGA
+--- a/drivers/char/hw_random/Makefile
++++ b/drivers/char/hw_random/Makefile
+@@ -17,6 +17,7 @@ obj-$(CONFIG_HW_RANDOM_OMAP) += omap-rng
+ obj-$(CONFIG_HW_RANDOM_PASEMI) += pasemi-rng.o
+ obj-$(CONFIG_HW_RANDOM_VIRTIO) += virtio-rng.o
+ obj-$(CONFIG_HW_RANDOM_TX4939) += tx4939-rng.o
++obj-$(CONFIG_HW_RANDOM_MCS814X) += mcs814x-rng.o
+ obj-$(CONFIG_HW_RANDOM_MXC_RNGA) += mxc-rnga.o
+ obj-$(CONFIG_HW_RANDOM_OCTEON) += octeon-rng.o
+ obj-$(CONFIG_HW_RANDOM_NOMADIK) += nomadik-rng.o
diff --git a/target/linux/mcs814x/patches-3.3/006-mcs814x_wdt.patch b/target/linux/mcs814x/patches-3.3/006-mcs814x_wdt.patch
new file mode 100644
index 000000000..83547aab7
--- /dev/null
+++ b/target/linux/mcs814x/patches-3.3/006-mcs814x_wdt.patch
@@ -0,0 +1,25 @@
+--- a/drivers/watchdog/Kconfig
++++ b/drivers/watchdog/Kconfig
+@@ -343,6 +343,12 @@ config IMX2_WDT
+ 	  To compile this driver as a module, choose M here: the
+ 	  module will be called imx2_wdt.
+ 
++config MCS814X_WATCHDOG
++	tristate "Moschip MCS814x watchdog"
++	depends on WATCHDOG_CORE && ARCH_MCS814X
++	help
++	  Support for the Moschip MCS814x SoCs on-chip watchdog timer.
++
+ # AVR32 Architecture
+ 
+ config AT32AP700X_WDT
+--- a/drivers/watchdog/Makefile
++++ b/drivers/watchdog/Makefile
+@@ -53,6 +53,7 @@ obj-$(CONFIG_STMP3XXX_WATCHDOG) += stmp3
+ obj-$(CONFIG_NUC900_WATCHDOG) += nuc900_wdt.o
+ obj-$(CONFIG_TS72XX_WATCHDOG) += ts72xx_wdt.o
+ obj-$(CONFIG_IMX2_WDT) += imx2_wdt.o
++obj-$(CONFIG_MCS814X_WATCHDOG) += mcs814x_wdt.o
+ 
+ # AVR32 Architecture
+ obj-$(CONFIG_AT32AP700X_WDT) += at32ap700x_wdt.o
diff --git a/target/linux/mcs814x/patches-3.3/008-mcs814x_gpio.patch b/target/linux/mcs814x/patches-3.3/008-mcs814x_gpio.patch
new file mode 100644
index 000000000..c19a9bae7
--- /dev/null
+++ b/target/linux/mcs814x/patches-3.3/008-mcs814x_gpio.patch
@@ -0,0 +1,25 @@
+--- a/drivers/gpio/Kconfig
++++ b/drivers/gpio/Kconfig
+@@ -450,6 +450,12 @@ config GPIO_MC33880
+ 	  SPI driver for Freescale MC33880 high-side/low-side switch.
+ 	  This provides GPIO interface supporting inputs and outputs.
+ 
++config GPIO_MCS814X
++	tristate "Moschip MCS814x GPIO support"
++	depends on ARCH_MCS814X
++	help
++	   GPIO driver for Moschip MCS814x SoC gpio controllers.
++
+ config GPIO_74X164
+ 	tristate "74x164 serial-in/parallel-out 8-bits shift register"
+ 	depends on SPI_MASTER
+--- a/drivers/gpio/Makefile
++++ b/drivers/gpio/Makefile
+@@ -26,6 +26,7 @@ obj-$(CONFIG_GPIO_MAX7300)	+= gpio-max73
+ obj-$(CONFIG_GPIO_MAX7301)	+= gpio-max7301.o
+ obj-$(CONFIG_GPIO_MAX732X)	+= gpio-max732x.o
+ obj-$(CONFIG_GPIO_MC33880)	+= gpio-mc33880.o
++obj-$(CONFIG_GPIO_MCS814X)	+= gpio-mcs814x.o
+ obj-$(CONFIG_GPIO_MCP23S08)	+= gpio-mcp23s08.o
+ obj-$(CONFIG_GPIO_ML_IOH)	+= gpio-ml-ioh.o
+ obj-$(CONFIG_GPIO_MPC5200)	+= gpio-mpc5200.o
diff --git a/target/linux/mcs814x/patches-3.3/010-fdt_config_cmdline_extend.patch b/target/linux/mcs814x/patches-3.3/010-fdt_config_cmdline_extend.patch
new file mode 100644
index 000000000..8735fd8e9
--- /dev/null
+++ b/target/linux/mcs814x/patches-3.3/010-fdt_config_cmdline_extend.patch
@@ -0,0 +1,140 @@
+The old logic assumes CMDLINE_FROM_BOOTLOADER vs. CMDLINE_FORCE and
+ignores CMDLINE_EXTEND.  Here's the old logic:
+
+- CONFIG_CMDLINE_FORCE=true
+    CONFIG_CMDLINE
+- dt bootargs=non-empty:
+    dt bootargs
+- dt bootargs=empty, @data is non-empty string
+    @data is left unchanged
+- dt bootargs=empty, @data is empty string
+    CONFIG_CMDLINE (or "" if that's not defined)
+
+The new logic is now documented in of_fdt.h and is copied here for
+reference:
+
+- CONFIG_CMDLINE_FORCE=true
+    CONFIG_CMDLINE
+- CONFIG_CMDLINE_EXTEND=true, @data is non-empty string
+    @data + dt bootargs (even if dt bootargs are empty)
+- CONFIG_CMDLINE_EXTEND=true, @data is empty string
+    CONFIG_CMDLINE + dt bootargs (even if dt bootargs are empty)
+- CMDLINE_FROM_BOOTLOADER=true, dt bootargs=non-empty:
+    dt bootargs
+- CMDLINE_FROM_BOOTLOADER=true, dt bootargs=empty, @data is non-empty string
+    @data is left unchanged
+- CMDLINE_FROM_BOOTLOADER=true, dt bootargs=empty, @data is empty string
+    CONFIG_CMDLINE (or "" if that's not defined)
+
+Signed-off-by: Doug Anderson <diand...@chromium.org>
+CC: devicetree-discuss@lists.ozlabs.org
+CC: Grant Likely <grant.lik...@secretlab.ca>
+CC: Benjamin Herrenschmidt <b...@kernel.crashing.org>
+CC: Rob Herring <rob.herr...@calxeda.com>
+---
+
+--- a/drivers/of/fdt.c
++++ b/drivers/of/fdt.c
+@@ -663,6 +663,29 @@ int __init early_init_dt_scan_memory(uns
+ 	return 0;
+ }
+ 
++/*
++ * Convert configs to something easy to use in C code
++ */
++#if defined(CONFIG_CMDLINE_FORCE)
++static const int overwrite_incoming_cmdline = 1;
++static const int read_dt_cmdline;
++static const int concat_cmdline;
++#elif defined(CONFIG_CMDLINE_EXTEND)
++static const int overwrite_incoming_cmdline;
++static const int read_dt_cmdline = 1;
++static const int concat_cmdline = 1;
++#else /* CMDLINE_FROM_BOOTLOADER */
++static const int overwrite_incoming_cmdline;
++static const int read_dt_cmdline = 1;
++static const int concat_cmdline;
++#endif
++
++#ifdef CONFIG_CMDLINE
++static const char *config_cmdline = CONFIG_CMDLINE;
++#else
++static const char *config_cmdline = "";
++#endif
++
+ int __init early_init_dt_scan_chosen(unsigned long node, const char *uname,
+ 				     int depth, void *data)
+ {
+@@ -677,22 +700,26 @@ int __init early_init_dt_scan_chosen(uns
+ 
+ 	early_init_dt_check_for_initrd(node);
+ 
+-	/* Retrieve command line */
+-	p = of_get_flat_dt_prop(node, "bootargs", &l);
+-	if (p != NULL && l > 0)
+-		strlcpy(data, p, min((int)l, COMMAND_LINE_SIZE));
+-
+-	/*
+-	 * CONFIG_CMDLINE is meant to be a default in case nothing else
+-	 * managed to set the command line, unless CONFIG_CMDLINE_FORCE
+-	 * is set in which case we override whatever was found earlier.
+-	 */
+-#ifdef CONFIG_CMDLINE
+-#ifndef CONFIG_CMDLINE_FORCE
+-	if (!((char *)data)[0])
+-#endif
+-		strlcpy(data, CONFIG_CMDLINE, COMMAND_LINE_SIZE);
+-#endif /* CONFIG_CMDLINE */
++	/* Put CONFIG_CMDLINE in if forced or if data had nothing in it to start */
++	if (overwrite_incoming_cmdline || !((char *)data)[0])
++		strlcpy(data, config_cmdline, COMMAND_LINE_SIZE);
++
++	/* Retrieve command line unless forcing */
++	if (read_dt_cmdline) {
++		p = of_get_flat_dt_prop(node, "bootargs", &l);
++		if (p != NULL && l > 0) {
++			if (concat_cmdline) {
++				strlcat(data, " ", COMMAND_LINE_SIZE);
++				strlcat(data, p, min_t(int, (int)l,
++						COMMAND_LINE_SIZE));
++			} else
++				strlcpy(data, p, min_t(int, (int)l,
++						COMMAND_LINE_SIZE));
++		}
++	}
++ 
++        pr_debug("Command line is: %s\n", (char*)data);
++ 
+ 
+ 	pr_debug("Command line is: %s\n", (char*)data);
+ 
+--- a/include/linux/of_fdt.h
++++ b/include/linux/of_fdt.h
+@@ -91,6 +91,27 @@ extern int of_flat_dt_is_compatible(unsi
+ extern int of_flat_dt_match(unsigned long node, const char *const *matches);
+ extern unsigned long of_get_flat_dt_root(void);
+ 
++/*
++ * early_init_dt_scan_chosen - scan the device tree for ramdisk and bootargs
++ *
++ * The boot arguments will be placed into the memory pointed to by @data.
++ * That memory should be COMMAND_LINE_SIZE big and initialized to be a valid
++ * (possibly empty) string.  Logic for what will be in @data after this
++ * function finishes:
++ *
++ * - CONFIG_CMDLINE_FORCE=true
++ *     CONFIG_CMDLINE
++ * - CONFIG_CMDLINE_EXTEND=true, @data is non-empty string
++ *     @data + dt bootargs (even if dt bootargs are empty)
++ * - CONFIG_CMDLINE_EXTEND=true, @data is empty string
++ *     CONFIG_CMDLINE + dt bootargs (even if dt bootargs are empty)
++ * - CMDLINE_FROM_BOOTLOADER=true, dt bootargs=non-empty:
++ *     dt bootargs
++ * - CMDLINE_FROM_BOOTLOADER=true, dt bootargs=empty, @data is non-empty string
++ *     @data is left unchanged
++ * - CMDLINE_FROM_BOOTLOADER=true, dt bootargs=empty, @data is empty string
++ *     CONFIG_CMDLINE (or "" if that's not defined)
++ */
+ extern int early_init_dt_scan_chosen(unsigned long node, const char *uname,
+ 				     int depth, void *data);
+ extern void early_init_dt_check_for_initrd(unsigned long node);
diff --git a/target/linux/mcs814x/patches-3.3/011-mcs814x_internal_phy.patch b/target/linux/mcs814x/patches-3.3/011-mcs814x_internal_phy.patch
new file mode 100644
index 000000000..1b546d744
--- /dev/null
+++ b/target/linux/mcs814x/patches-3.3/011-mcs814x_internal_phy.patch
@@ -0,0 +1,20 @@
+--- a/drivers/net/phy/Kconfig
++++ b/drivers/net/phy/Kconfig
+@@ -135,6 +135,10 @@ config MICREL_PHY
+ 	---help---
+ 	  Currently has a driver for the KSZ8041
+ 
++config MCS814X_PHY
++	tristate "Driver for the Moschip MCS814x internal PHY"
++	depends on ARCH_MCS814X
++
+ config FIXED_PHY
+ 	bool "Driver for MDIO Bus/PHY emulation with fixed speed/link PHYs"
+ 	depends on PHYLIB=y
+--- a/drivers/net/phy/Makefile
++++ b/drivers/net/phy/Makefile
+@@ -38,3 +38,4 @@ obj-$(CONFIG_STE10XP)		+= ste10Xp.o
+ obj-$(CONFIG_MICREL_PHY)	+= micrel.o
+ obj-$(CONFIG_MDIO_OCTEON)	+= mdio-octeon.o
+ obj-$(CONFIG_MICREL_KS8995MA)	+= spi_ks8995.o
++obj-$(CONFIG_MCS814X_PHY)	+= mcs814x.o