1 files changed, 125 insertions, 0 deletions
diff --git a/arch/arm/mach-lpc32xx/common.c b/arch/arm/mach-lpc32xx/common.c
new file mode 100644
index 000000000..304ea61a0
--- /dev/null
+++ b/arch/arm/mach-lpc32xx/common.c
@@ -0,0 +1,125 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * arch/arm/mach-lpc32xx/common.c
+ *
+ * Author: Kevin Wells <kevin.wells@nxp.com>
+ *
+ * Copyright (C) 2010 NXP Semiconductors
+ */
+
+#include <linux/init.h>
+#include <linux/soc/nxp/lpc32xx-misc.h>
+
+#include <asm/mach/map.h>
+#include <asm/system_info.h>
+
+#include "lpc32xx.h"
+#include "common.h"
+
+/*
+ * Returns the unique ID for the device
+ */
+void lpc32xx_get_uid(u32 devid[4])
+{
+	int i;
+
+	for (i = 0; i < 4; i++)
+		devid[i] = __raw_readl(LPC32XX_CLKPWR_DEVID(i << 2));
+}
+
+/*
+ * Detects and returns IRAM size for the device variation
+ */
+#define LPC32XX_IRAM_BANK_SIZE SZ_128K
+static u32 iram_size;
+u32 lpc32xx_return_iram(void __iomem **mapbase, dma_addr_t *dmaaddr)
+{
+	if (iram_size == 0) {
+		u32 savedval1, savedval2;
+		void __iomem *iramptr1, *iramptr2;
+
+		iramptr1 = io_p2v(LPC32XX_IRAM_BASE);
+		iramptr2 = io_p2v(LPC32XX_IRAM_BASE + LPC32XX_IRAM_BANK_SIZE);
+		savedval1 = __raw_readl(iramptr1);
+		savedval2 = __raw_readl(iramptr2);
+
+		if (savedval1 == savedval2) {
+			__raw_writel(savedval2 + 1, iramptr2);
+			if (__raw_readl(iramptr1) == savedval2 + 1)
+				iram_size = LPC32XX_IRAM_BANK_SIZE;
+			else
+				iram_size = LPC32XX_IRAM_BANK_SIZE * 2;
+			__raw_writel(savedval2, iramptr2);
+		} else
+			iram_size = LPC32XX_IRAM_BANK_SIZE * 2;
+	}
+	if (dmaaddr)
+		*dmaaddr = LPC32XX_IRAM_BASE;
+	if (mapbase)
+		*mapbase = io_p2v(LPC32XX_IRAM_BASE);
+
+	return iram_size;
+}
+EXPORT_SYMBOL_GPL(lpc32xx_return_iram);
+
+void lpc32xx_set_phy_interface_mode(phy_interface_t mode)
+{
+	u32 tmp = __raw_readl(LPC32XX_CLKPWR_MACCLK_CTRL);
+	tmp &= ~LPC32XX_CLKPWR_MACCTRL_PINS_MSK;
+	if (mode == PHY_INTERFACE_MODE_MII)
+		tmp |= LPC32XX_CLKPWR_MACCTRL_USE_MII_PINS;
+	else
+		tmp |= LPC32XX_CLKPWR_MACCTRL_USE_RMII_PINS;
+	__raw_writel(tmp, LPC32XX_CLKPWR_MACCLK_CTRL);
+}
+EXPORT_SYMBOL_GPL(lpc32xx_set_phy_interface_mode);
+
+static struct map_desc lpc32xx_io_desc[] __initdata = {
+	{
+		.virtual	= (unsigned long)IO_ADDRESS(LPC32XX_AHB0_START),
+		.pfn		= __phys_to_pfn(LPC32XX_AHB0_START),
+		.length		= LPC32XX_AHB0_SIZE,
+		.type		= MT_DEVICE
+	},
+	{
+		.virtual	= (unsigned long)IO_ADDRESS(LPC32XX_AHB1_START),
+		.pfn		= __phys_to_pfn(LPC32XX_AHB1_START),
+		.length		= LPC32XX_AHB1_SIZE,
+		.type		= MT_DEVICE
+	},
+	{
+		.virtual	= (unsigned long)IO_ADDRESS(LPC32XX_FABAPB_START),
+		.pfn		= __phys_to_pfn(LPC32XX_FABAPB_START),
+		.length		= LPC32XX_FABAPB_SIZE,
+		.type		= MT_DEVICE
+	},
+	{
+		.virtual	= (unsigned long)IO_ADDRESS(LPC32XX_IRAM_BASE),
+		.pfn		= __phys_to_pfn(LPC32XX_IRAM_BASE),
+		.length		= (LPC32XX_IRAM_BANK_SIZE * 2),
+		.type		= MT_DEVICE
+	},
+};
+
+void __init lpc32xx_map_io(void)
+{
+	iotable_init(lpc32xx_io_desc, ARRAY_SIZE(lpc32xx_io_desc));
+}
+
+static int __init lpc32xx_check_uid(void)
+{
+	u32 uid[4];
+
+	lpc32xx_get_uid(uid);
+
+	printk(KERN_INFO "LPC32XX unique ID: %08x%08x%08x%08x\n",
+		uid[3], uid[2], uid[1], uid[0]);
+
+	if (!system_serial_low && !system_serial_high) {
+		system_serial_low = uid[0];
+		system_serial_high = uid[1];
+	}
+
+	return 1;
+}
+arch_initcall(lpc32xx_check_uid);