initial_commit

1 files changed, 236 insertions, 0 deletions

diff --git a/arch/arm/mach-integrator/core.c b/arch/arm/mach-integrator/core.c
new file mode 100644
index 00000000..77315b99
--- /dev/null
+++ b/arch/arm/mach-integrator/core.c
@@ -0,0 +1,236 @@
+/*
+ *  linux/arch/arm/mach-integrator/core.c
+ *
+ *  Copyright (C) 2000-2003 Deep Blue Solutions Ltd
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2, as
+ * published by the Free Software Foundation.
+ */
+#include <linux/types.h>
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/device.h>
+#include <linux/spinlock.h>
+#include <linux/interrupt.h>
+#include <linux/irq.h>
+#include <linux/memblock.h>
+#include <linux/sched.h>
+#include <linux/smp.h>
+#include <linux/termios.h>
+#include <linux/amba/bus.h>
+#include <linux/amba/serial.h>
+#include <linux/io.h>
+#include <linux/clkdev.h>
+
+#include <mach/hardware.h>
+#include <mach/platform.h>
+#include <asm/irq.h>
+#include <mach/cm.h>
+#include <asm/system.h>
+#include <asm/leds.h>
+#include <asm/mach/time.h>
+#include <asm/pgtable.h>
+
+static struct amba_pl010_data integrator_uart_data;
+
+static struct amba_device rtc_device = {
+	.dev		= {
+		.init_name = "mb:15",
+	},
+	.res		= {
+		.start	= INTEGRATOR_RTC_BASE,
+		.end	= INTEGRATOR_RTC_BASE + SZ_4K - 1,
+		.flags	= IORESOURCE_MEM,
+	},
+	.irq		= { IRQ_RTCINT, NO_IRQ },
+	.periphid	= 0x00041030,
+};
+
+static struct amba_device uart0_device = {
+	.dev		= {
+		.init_name = "mb:16",
+		.platform_data = &integrator_uart_data,
+	},
+	.res		= {
+		.start	= INTEGRATOR_UART0_BASE,
+		.end	= INTEGRATOR_UART0_BASE + SZ_4K - 1,
+		.flags	= IORESOURCE_MEM,
+	},
+	.irq		= { IRQ_UARTINT0, NO_IRQ },
+	.periphid	= 0x0041010,
+};
+
+static struct amba_device uart1_device = {
+	.dev		= {
+		.init_name = "mb:17",
+		.platform_data = &integrator_uart_data,
+	},
+	.res		= {
+		.start	= INTEGRATOR_UART1_BASE,
+		.end	= INTEGRATOR_UART1_BASE + SZ_4K - 1,
+		.flags	= IORESOURCE_MEM,
+	},
+	.irq		= { IRQ_UARTINT1, NO_IRQ },
+	.periphid	= 0x0041010,
+};
+
+static struct amba_device kmi0_device = {
+	.dev		= {
+		.init_name = "mb:18",
+	},
+	.res		= {
+		.start	= KMI0_BASE,
+		.end	= KMI0_BASE + SZ_4K - 1,
+		.flags	= IORESOURCE_MEM,
+	},
+	.irq		= { IRQ_KMIINT0, NO_IRQ },
+	.periphid	= 0x00041050,
+};
+
+static struct amba_device kmi1_device = {
+	.dev		= {
+		.init_name = "mb:19",
+	},
+	.res		= {
+		.start	= KMI1_BASE,
+		.end	= KMI1_BASE + SZ_4K - 1,
+		.flags	= IORESOURCE_MEM,
+	},
+	.irq		= { IRQ_KMIINT1, NO_IRQ },
+	.periphid	= 0x00041050,
+};
+
+static struct amba_device *amba_devs[] __initdata = {
+	&rtc_device,
+	&uart0_device,
+	&uart1_device,
+	&kmi0_device,
+	&kmi1_device,
+};
+
+/*
+ * These are fixed clocks.
+ */
+static struct clk clk24mhz = {
+	.rate	= 24000000,
+};
+
+static struct clk uartclk = {
+	.rate	= 14745600,
+};
+
+static struct clk dummy_apb_pclk;
+
+static struct clk_lookup lookups[] = {
+	{	/* Bus clock */
+		.con_id		= "apb_pclk",
+		.clk		= &dummy_apb_pclk,
+	}, {	/* UART0 */
+		.dev_id		= "mb:16",
+		.clk		= &uartclk,
+	}, {	/* UART1 */
+		.dev_id		= "mb:17",
+		.clk		= &uartclk,
+	}, {	/* KMI0 */
+		.dev_id		= "mb:18",
+		.clk		= &clk24mhz,
+	}, {	/* KMI1 */
+		.dev_id		= "mb:19",
+		.clk		= &clk24mhz,
+	}, {	/* MMCI - IntegratorCP */
+		.dev_id		= "mb:1c",
+		.clk		= &uartclk,
+	}
+};
+
+void __init integrator_init_early(void)
+{
+	clkdev_add_table(lookups, ARRAY_SIZE(lookups));
+}
+
+static int __init integrator_init(void)
+{
+	int i;
+
+	for (i = 0; i < ARRAY_SIZE(amba_devs); i++) {
+		struct amba_device *d = amba_devs[i];
+		amba_device_register(d, &iomem_resource);
+	}
+
+	return 0;
+}
+
+arch_initcall(integrator_init);
+
+/*
+ * On the Integrator platform, the port RTS and DTR are provided by
+ * bits in the following SC_CTRLS register bits:
+ *        RTS  DTR
+ *  UART0  7    6
+ *  UART1  5    4
+ */
+#define SC_CTRLC	IO_ADDRESS(INTEGRATOR_SC_CTRLC)
+#define SC_CTRLS	IO_ADDRESS(INTEGRATOR_SC_CTRLS)
+
+static void integrator_uart_set_mctrl(struct amba_device *dev, void __iomem *base, unsigned int mctrl)
+{
+	unsigned int ctrls = 0, ctrlc = 0, rts_mask, dtr_mask;
+
+	if (dev == &uart0_device) {
+		rts_mask = 1 << 4;
+		dtr_mask = 1 << 5;
+	} else {
+		rts_mask = 1 << 6;
+		dtr_mask = 1 << 7;
+	}
+
+	if (mctrl & TIOCM_RTS)
+		ctrlc |= rts_mask;
+	else
+		ctrls |= rts_mask;
+
+	if (mctrl & TIOCM_DTR)
+		ctrlc |= dtr_mask;
+	else
+		ctrls |= dtr_mask;
+
+	__raw_writel(ctrls, SC_CTRLS);
+	__raw_writel(ctrlc, SC_CTRLC);
+}
+
+static struct amba_pl010_data integrator_uart_data = {
+	.set_mctrl = integrator_uart_set_mctrl,
+};
+
+#define CM_CTRL	IO_ADDRESS(INTEGRATOR_HDR_CTRL)
+
+static DEFINE_SPINLOCK(cm_lock);
+
+/**
+ * cm_control - update the CM_CTRL register.
+ * @mask: bits to change
+ * @set: bits to set
+ */
+void cm_control(u32 mask, u32 set)
+{
+	unsigned long flags;
+	u32 val;
+
+	spin_lock_irqsave(&cm_lock, flags);
+	val = readl(CM_CTRL) & ~mask;
+	writel(val | set, CM_CTRL);
+	spin_unlock_irqrestore(&cm_lock, flags);
+}
+
+EXPORT_SYMBOL(cm_control);
+
+/*
+ * We need to stop things allocating the low memory; ideally we need a
+ * better implementation of GFP_DMA which does not assume that DMA-able
+ * memory starts at zero.
+ */
+void __init integrator_reserve(void)
+{
+	memblock_reserve(PHYS_OFFSET, __pa(swapper_pg_dir) - PHYS_OFFSET);
+}