---

yaml
---
r: 22837
b: refs/heads/master
c: e7736d4
h: refs/heads/master
i:
  22835: a9ac74e
v: v3

[refs]

@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 73deb7dc05b4cf968e506e7b18345bc65bcbc0f3
+refs/heads/master: e7736d47a11a771ba87314be563b2cb6b8d11d14

trunk/arch/arm/Kconfig

@@ -108,6 +108,13 @@ config ARCH_EBSA110
 	  Ethernet interface, two PCMCIA sockets, two serial ports and a
 	  parallel port.
 
+config ARCH_EP93XX
+	bool "EP93xx-based"
+	select ARM_AMBA
+	select ARM_VIC
+	help
+	  This enables support for the Cirrus EP93xx series of CPUs.
+
 config ARCH_FOOTBRIDGE
 	bool "FootBridge"
 	select FOOTBRIDGE
@@ -250,6 +257,8 @@ endchoice
 
 source "arch/arm/mach-clps711x/Kconfig"
 
+source "arch/arm/mach-ep93xx/Kconfig"
+
 source "arch/arm/mach-footbridge/Kconfig"
 
 source "arch/arm/mach-integrator/Kconfig"

trunk/arch/arm/Makefile

@@ -105,6 +105,7 @@ endif
  machine-$(CONFIG_ARCH_AAEC2000)   := aaec2000
  machine-$(CONFIG_ARCH_REALVIEW)   := realview
  machine-$(CONFIG_ARCH_AT91RM9200) := at91rm9200
+ machine-$(CONFIG_ARCH_EP93XX)     := ep93xx
 
 ifeq ($(CONFIG_ARCH_EBSA110),y)
 # This is what happens if you forget the IOCS16 line.

trunk/arch/arm/mach-ep93xx/Kconfig

@@ -0,0 +1,21 @@
+if ARCH_EP93XX
+
+menu "Cirrus EP93xx Implementation Options"
+
+comment "EP93xx Platforms"
+
+config MACH_GESBC9312
+	bool "Support Glomation GESBC-9312-sx"
+	help
+	  Say 'Y' here if you want your kernel to support the Glomation
+	  GESBC-9312-sx board.
+
+config MACH_TS72XX
+	bool "Support Technologic Systems TS-72xx SBC"
+	help
+	  Say 'Y' here if you want your kernel to support the
+	  Technologic Systems TS-72xx board.
+
+endmenu
+
+endif

trunk/arch/arm/mach-ep93xx/Makefile

@@ -0,0 +1,10 @@
+#
+# Makefile for the linux kernel.
+#
+obj-y			:= core.o
+obj-m			:=
+obj-n			:=
+obj-			:=
+
+obj-$(CONFIG_MACH_GESBC9312)	+= gesbc9312.o
+obj-$(CONFIG_MACH_TS72XX)	+= ts72xx.o

trunk/arch/arm/mach-ep93xx/Makefile.boot

@@ -0,0 +1,2 @@
+   zreladdr-y	:= 0x00008000
+params_phys-y	:= 0x00000100

trunk/arch/arm/mach-ep93xx/core.c

@@ -0,0 +1,173 @@
+/*
+ * arch/arm/mach-ep93xx/core.c
+ * Core routines for Cirrus EP93xx chips.
+ *
+ * Copyright (C) 2006 Lennert Buytenhek <buytenh@wantstofly.org>
+ *
+ * Thanks go to Michael Burian and Ray Lehtiniemi for their key
+ * role in the ep93xx linux community.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or (at
+ * your option) any later version.
+ */
+
+#include <linux/config.h>
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/spinlock.h>
+#include <linux/sched.h>
+#include <linux/interrupt.h>
+#include <linux/serial.h>
+#include <linux/tty.h>
+#include <linux/bitops.h>
+#include <linux/serial.h>
+#include <linux/serial_8250.h>
+#include <linux/serial_core.h>
+#include <linux/device.h>
+#include <linux/mm.h>
+#include <linux/time.h>
+#include <linux/timex.h>
+#include <linux/delay.h>
+#include <linux/amba/bus.h>
+
+#include <asm/types.h>
+#include <asm/setup.h>
+#include <asm/memory.h>
+#include <asm/hardware.h>
+#include <asm/irq.h>
+#include <asm/system.h>
+#include <asm/tlbflush.h>
+#include <asm/pgtable.h>
+#include <asm/io.h>
+
+#include <asm/mach/map.h>
+#include <asm/mach/time.h>
+#include <asm/mach/irq.h>
+
+#include <asm/hardware/vic.h>
+
+
+/*************************************************************************
+ * Static I/O mappings that are needed for all EP93xx platforms
+ *************************************************************************/
+static struct map_desc ep93xx_io_desc[] __initdata = {
+	{
+		.virtual	= EP93XX_AHB_VIRT_BASE,
+		.pfn		= __phys_to_pfn(EP93XX_AHB_PHYS_BASE),
+		.length		= EP93XX_AHB_SIZE,
+		.type		= MT_DEVICE,
+	}, {
+		.virtual	= EP93XX_APB_VIRT_BASE,
+		.pfn		= __phys_to_pfn(EP93XX_APB_PHYS_BASE),
+		.length		= EP93XX_APB_SIZE,
+		.type		= MT_DEVICE,
+	},
+};
+
+void __init ep93xx_map_io(void)
+{
+	iotable_init(ep93xx_io_desc, ARRAY_SIZE(ep93xx_io_desc));
+}
+
+
+/*************************************************************************
+ * Timer handling for EP93xx
+ *************************************************************************
+ * The ep93xx has four internal timers.  Timers 1, 2 (both 16 bit) and
+ * 3 (32 bit) count down at 508 kHz, are self-reloading, and can generate
+ * an interrupt on underflow.  Timer 4 (40 bit) counts down at 983.04 kHz,
+ * is free-running, and can't generate interrupts.
+ *
+ * The 508 kHz timers are ideal for use for the timer interrupt, as the
+ * most common values of HZ divide 508 kHz nicely.  We pick one of the 16
+ * bit timers (timer 1) since we don't need more than 16 bits of reload
+ * value as long as HZ >= 8.
+ *
+ * The higher clock rate of timer 4 makes it a better choice than the
+ * other timers for use in gettimeoffset(), while the fact that it can't
+ * generate interrupts means we don't have to worry about not being able
+ * to use this timer for something else.  We also use timer 4 for keeping
+ * track of lost jiffies.
+ */
+static unsigned int last_jiffy_time;
+
+#define TIMER4_TICKS_PER_JIFFY		((CLOCK_TICK_RATE + (HZ/2)) / HZ)
+
+static int ep93xx_timer_interrupt(int irq, void *dev_id, struct pt_regs *regs)
+{
+	write_seqlock(&xtime_lock);
+
+	__raw_writel(1, EP93XX_TIMER1_CLEAR);
+	while (__raw_readl(EP93XX_TIMER4_VALUE_LOW) - last_jiffy_time
+						>= TIMER4_TICKS_PER_JIFFY) {
+		last_jiffy_time += TIMER4_TICKS_PER_JIFFY;
+		timer_tick(regs);
+	}
+
+	write_sequnlock(&xtime_lock);
+
+	return IRQ_HANDLED;
+}
+
+static struct irqaction ep93xx_timer_irq = {
+	.name		= "ep93xx timer",
+	.flags		= SA_INTERRUPT | SA_TIMER,
+	.handler	= ep93xx_timer_interrupt,
+};
+
+static void __init ep93xx_timer_init(void)
+{
+	/* Enable periodic HZ timer.  */
+	__raw_writel(0x48, EP93XX_TIMER1_CONTROL);
+	__raw_writel((508000 / HZ) - 1, EP93XX_TIMER1_LOAD);
+	__raw_writel(0xc8, EP93XX_TIMER1_CONTROL);
+
+	/* Enable lost jiffy timer.  */
+	__raw_writel(0x100, EP93XX_TIMER4_VALUE_HIGH);
+
+	setup_irq(IRQ_EP93XX_TIMER1, &ep93xx_timer_irq);
+}
+
+static unsigned long ep93xx_gettimeoffset(void)
+{
+	int offset;
+
+	offset = __raw_readl(EP93XX_TIMER4_VALUE_LOW) - last_jiffy_time;
+
+	/* Calculate (1000000 / 983040) * offset.  */
+	return offset + (53 * offset / 3072);
+}
+
+struct sys_timer ep93xx_timer = {
+	.init		= ep93xx_timer_init,
+	.offset		= ep93xx_gettimeoffset,
+};
+
+
+/*************************************************************************
+ * EP93xx IRQ handling
+ *************************************************************************/
+void __init ep93xx_init_irq(void)
+{
+	vic_init((void *)EP93XX_VIC1_BASE, 0, EP93XX_VIC1_VALID_IRQ_MASK);
+	vic_init((void *)EP93XX_VIC2_BASE, 32, EP93XX_VIC2_VALID_IRQ_MASK);
+}
+
+
+/*************************************************************************
+ * EP93xx peripheral handling
+ *************************************************************************/
+void __init ep93xx_init_devices(void)
+{
+	unsigned int v;
+
+	/*
+	 * Disallow access to MaverickCrunch initially.
+	 */
+	v = __raw_readl(EP93XX_SYSCON_DEVICE_CONFIG);
+	v &= ~EP93XX_SYSCON_DEVICE_CONFIG_CRUNCH_ENABLE;
+	__raw_writel(0xaa, EP93XX_SYSCON_SWLOCK);
+	__raw_writel(v, EP93XX_SYSCON_DEVICE_CONFIG);
+}

trunk/arch/arm/mach-ep93xx/gesbc9312.c

@@ -0,0 +1,40 @@
+/*
+ * arch/arm/mach-ep93xx/gesbc9312.c
+ * Glomation GESBC-9312-sx support.
+ *
+ * Copyright (C) 2006 Lennert Buytenhek <buytenh@wantstofly.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or (at
+ * your option) any later version.
+ */
+
+#include <linux/config.h>
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/mm.h>
+#include <linux/sched.h>
+#include <linux/interrupt.h>
+#include <linux/mtd/physmap.h>
+#include <asm/io.h>
+#include <asm/hardware.h>
+#include <asm/mach-types.h>
+#include <asm/mach/arch.h>
+
+static void __init gesbc9312_init_machine(void)
+{
+	ep93xx_init_devices();
+	physmap_configure(0x60000000, 0x00800000, 4, NULL);
+}
+
+MACHINE_START(GESBC9312, "Glomation GESBC-9312-sx")
+	/* Maintainer: Lennert Buytenhek <buytenh@wantstofly.org> */
+	.phys_io	= EP93XX_APB_PHYS_BASE,
+	.io_pg_offst	= ((EP93XX_APB_VIRT_BASE) >> 18) & 0xfffc,
+	.boot_params	= 0x00000100,
+	.map_io		= ep93xx_map_io,
+	.init_irq	= ep93xx_init_irq,
+	.timer		= &ep93xx_timer,
+	.init_machine	= gesbc9312_init_machine,
+MACHINE_END