1 files changed, 165 insertions, 0 deletions
diff --git a/target/linux/mcs814x/files-3.3/arch/arm/mach-mcs814x/common.c b/target/linux/mcs814x/files-3.3/arch/arm/mach-mcs814x/common.c
new file mode 100644
index 000000000..68b0a0dd1
--- /dev/null
+++ b/target/linux/mcs814x/files-3.3/arch/arm/mach-mcs814x/common.c
@@ -0,0 +1,165 @@
+/*
+ * arch/arm/mach-mcs814x/common.c
+ *
+ * Core functions for Moschip MCS814x SoCs
+ *
+ * This file is licensed under the terms of the GNU General Public
+ * License version 2.  This program is licensed "as is" without any
+ * warranty of any kind, whether express or implied.
+ */
+
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/io.h>
+#include <linux/gpio.h>
+#include <linux/of.h>
+#include <linux/of_address.h>
+
+#include <asm/setup.h>
+#include <asm/mach-types.h>
+#include <asm/mach/arch.h>
+#include <mach/mcs814x.h>
+#include <mach/cpu.h>
+#include <asm/pgtable.h>
+#include <asm/mach/map.h>
+
+void __iomem *mcs814x_sysdbg_base;
+
+static struct map_desc mcs814x_io_desc[] __initdata = {
+	{
+		.virtual	= MCS814X_IO_BASE,
+		.pfn		= __phys_to_pfn(MCS814X_IO_START),
+		.length		= MCS814X_IO_SIZE,
+		.type		= MT_DEVICE
+	},
+};
+
+struct cpu_mode {
+	const char *name;
+	int gpio_start;
+	int gpio_end;
+};
+
+static const struct cpu_mode cpu_modes[] = {
+	{
+		.name		= "I2S",
+		.gpio_start	= 4,
+		.gpio_end	= 8,
+	},
+	{
+		.name		= "UART",
+		.gpio_start	= 4,
+		.gpio_end	= 9,
+	},
+	{
+		.name		= "External MII",
+		.gpio_start	= 0,
+		.gpio_end	= 16,
+	},
+	{
+		.name		= "Normal",
+		.gpio_start	= -1,
+		.gpio_end	= -1,
+	},
+};
+
+static void mcs814x_eth_hardware_filter_set(u8 value)
+{
+	u32 reg;
+
+	reg = readl_relaxed(MCS814X_VIRT_BASE + MCS814X_DBGLED);
+	if (value)
+		reg |= 0x80;
+	else
+		reg &= ~0x80;
+	writel_relaxed(reg, MCS814X_VIRT_BASE + MCS814X_DBGLED);
+}
+
+static void mcs814x_eth_led_cfg_set(u8 cfg)
+{
+	u32 reg;
+
+	reg = readl_relaxed(mcs814x_sysdbg_base + SYSDBG_BS2);
+	reg &= ~LED_CFG_MASK;
+	reg |= cfg;
+	writel_relaxed(reg, mcs814x_sysdbg_base + SYSDBG_BS2);
+}
+
+static void mcs814x_eth_buffer_shifting_set(u8 value)
+{
+	u8 reg;
+
+	reg = readb_relaxed(mcs814x_sysdbg_base + SYSDBG_SYSCTL_MAC);
+	if (value)
+		reg |= BUF_SHIFT_BIT;
+	else
+		reg &= ~BUF_SHIFT_BIT;
+	writeb_relaxed(reg, mcs814x_sysdbg_base + SYSDBG_SYSCTL_MAC);
+}
+
+static struct of_device_id mcs814x_eth_ids[] __initdata = {
+	{ .compatible = "moschip,nuport-mac", },
+	{ /* sentinel */ },
+};
+
+/* Configure platform specific knobs based on ethernet device node
+ * properties */
+static void mcs814x_eth_init(void)
+{
+	struct device_node *np;
+	const unsigned int *intspec;
+
+	np = of_find_matching_node(NULL, mcs814x_eth_ids);
+	if (!np)
+		return;
+
+	/* hardware filter must always be enabled */
+	mcs814x_eth_hardware_filter_set(1);
+
+	intspec = of_get_property(np, "nuport-mac,buffer-shifting", NULL);
+	if (!intspec)
+		mcs814x_eth_buffer_shifting_set(0);
+	else
+		mcs814x_eth_buffer_shifting_set(1);
+
+	intspec = of_get_property(np, "nuport-mac,link-activity", NULL);
+	if (intspec)
+		mcs814x_eth_led_cfg_set(be32_to_cpup(intspec));
+
+	of_node_put(np);
+}
+
+void __init mcs814x_init_machine(void)
+{
+	u32 bs2, cpu_mode;
+	int gpio;
+
+	bs2 = readl_relaxed(mcs814x_sysdbg_base + SYSDBG_BS2);
+	cpu_mode = (bs2 >> CPU_MODE_SHIFT) & CPU_MODE_MASK;
+
+	pr_info("CPU mode: %s\n", cpu_modes[cpu_mode].name);
+
+	/* request the gpios since the pins are muxed for functionnality */
+	for (gpio = cpu_modes[cpu_mode].gpio_start;
+		gpio == cpu_modes[cpu_mode].gpio_end; gpio++) {
+		if (gpio != -1)
+			gpio_request(gpio, cpu_modes[cpu_mode].name);
+	}
+
+	mcs814x_eth_init();
+}
+
+void __init mcs814x_map_io(void)
+{
+	iotable_init(mcs814x_io_desc, ARRAY_SIZE(mcs814x_io_desc));
+
+	mcs814x_sysdbg_base = ioremap(MCS814X_IO_START + MCS814X_SYSDBG,
+					MCS814X_SYSDBG_SIZE);
+	if (!mcs814x_sysdbg_base)
+		panic("unable to remap sysdbg base");
+}
+
+void mcs814x_restart(char mode, const char *cmd)
+{
+	writel_relaxed(~(1 << 31), mcs814x_sysdbg_base);
+}