Initial commit; kernel source import

arch/arm/mach-highbank/Kconfig

@@ -0,0 +1,20 @@
+config ARCH_HIGHBANK
+	bool "Calxeda ECX-1000/2000 (Highbank/Midway)" if ARCH_MULTI_V7
+	select ARCH_HAS_CPUFREQ
+	select ARCH_HAS_OPP
+	select ARCH_WANT_OPTIONAL_GPIOLIB
+	select ARM_AMBA
+	select ARM_GIC
+	select ARM_TIMER_SP804
+	select CACHE_L2X0
+	select CLKDEV_LOOKUP
+	select COMMON_CLK
+	select CPU_V7
+	select GENERIC_CLOCKEVENTS
+	select HAVE_ARM_SCU
+	select HAVE_ARM_TWD if LOCAL_TIMERS
+	select HAVE_SMP
+	select MAILBOX
+	select PL320_MBOX
+	select SPARSE_IRQ
+	select USE_OF

arch/arm/mach-highbank/Makefile

@@ -0,0 +1,8 @@
+obj-y					:= highbank.o system.o smc.o
+
+plus_sec := $(call as-instr,.arch_extension sec,+sec)
+AFLAGS_smc.o				:=-Wa,-march=armv7-a$(plus_sec)
+
+obj-$(CONFIG_SMP)			+= platsmp.o
+obj-$(CONFIG_HOTPLUG_CPU)		+= hotplug.o
+obj-$(CONFIG_PM_SLEEP)			+= pm.o

arch/arm/mach-highbank/core.h

@@ -0,0 +1,19 @@
+#ifndef __HIGHBANK_CORE_H
+#define __HIGHBANK_CORE_H
+
+extern void highbank_set_cpu_jump(int cpu, void *jump_addr);
+extern void highbank_restart(char, const char *);
+extern void __iomem *scu_base_addr;
+
+#ifdef CONFIG_PM_SLEEP
+extern void highbank_pm_init(void);
+#else
+static inline void highbank_pm_init(void) {}
+#endif
+
+extern void highbank_smc1(int fn, int arg);
+extern void highbank_cpu_die(unsigned int cpu);
+
+extern struct smp_operations highbank_smp_ops;
+
+#endif

arch/arm/mach-highbank/highbank.c

@@ -0,0 +1,185 @@
+/*
+ * Copyright 2010-2011 Calxeda, Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+#include <linux/clk.h>
+#include <linux/clkdev.h>
+#include <linux/clocksource.h>
+#include <linux/dma-mapping.h>
+#include <linux/io.h>
+#include <linux/irq.h>
+#include <linux/irqchip.h>
+#include <linux/irqdomain.h>
+#include <linux/of.h>
+#include <linux/of_irq.h>
+#include <linux/of_platform.h>
+#include <linux/of_address.h>
+#include <linux/smp.h>
+#include <linux/amba/bus.h>
+#include <linux/clk-provider.h>
+
+#include <asm/cacheflush.h>
+#include <asm/cputype.h>
+#include <asm/smp_plat.h>
+#include <asm/hardware/cache-l2x0.h>
+#include <asm/mach/arch.h>
+#include <asm/mach/map.h>
+#include <asm/mach/time.h>
+
+#include "core.h"
+#include "sysregs.h"
+
+void __iomem *sregs_base;
+void __iomem *scu_base_addr;
+
+static void __init highbank_scu_map_io(void)
+{
+	unsigned long base;
+
+	/* Get SCU base */
+	asm("mrc p15, 4, %0, c15, c0, 0" : "=r" (base));
+
+	scu_base_addr = ioremap(base, SZ_4K);
+}
+
+#define HB_JUMP_TABLE_PHYS(cpu)		(0x40 + (0x10 * (cpu)))
+#define HB_JUMP_TABLE_VIRT(cpu)		phys_to_virt(HB_JUMP_TABLE_PHYS(cpu))
+
+void highbank_set_cpu_jump(int cpu, void *jump_addr)
+{
+	cpu = MPIDR_AFFINITY_LEVEL(cpu_logical_map(cpu), 0);
+	writel(virt_to_phys(jump_addr), HB_JUMP_TABLE_VIRT(cpu));
+	__cpuc_flush_dcache_area(HB_JUMP_TABLE_VIRT(cpu), 16);
+	outer_clean_range(HB_JUMP_TABLE_PHYS(cpu),
+			  HB_JUMP_TABLE_PHYS(cpu) + 15);
+}
+
+#ifdef CONFIG_CACHE_L2X0
+static void highbank_l2x0_disable(void)
+{
+	/* Disable PL310 L2 Cache controller */
+	highbank_smc1(0x102, 0x0);
+}
+#endif
+
+static void __init highbank_init_irq(void)
+{
+	irqchip_init();
+
+	if (of_find_compatible_node(NULL, NULL, "arm,cortex-a9"))
+		highbank_scu_map_io();
+
+#ifdef CONFIG_CACHE_L2X0
+	/* Enable PL310 L2 Cache controller */
+	highbank_smc1(0x102, 0x1);
+	l2x0_of_init(0, ~0UL);
+	outer_cache.disable = highbank_l2x0_disable;
+#endif
+}
+
+static void __init highbank_timer_init(void)
+{
+	struct device_node *np;
+
+	/* Map system registers */
+	np = of_find_compatible_node(NULL, NULL, "calxeda,hb-sregs");
+	sregs_base = of_iomap(np, 0);
+	WARN_ON(!sregs_base);
+
+	of_clk_init(NULL);
+
+	clocksource_of_init();
+}
+
+static void highbank_power_off(void)
+{
+	highbank_set_pwr_shutdown();
+
+	while (1)
+		cpu_do_idle();
+}
+
+static int highbank_platform_notifier(struct notifier_block *nb,
+				  unsigned long event, void *__dev)
+{
+	struct resource *res;
+	int reg = -1;
+	struct device *dev = __dev;
+
+	if (event != BUS_NOTIFY_ADD_DEVICE)
+		return NOTIFY_DONE;
+
+	if (of_device_is_compatible(dev->of_node, "calxeda,hb-ahci"))
+		reg = 0xc;
+	else if (of_device_is_compatible(dev->of_node, "calxeda,hb-sdhci"))
+		reg = 0x18;
+	else if (of_device_is_compatible(dev->of_node, "arm,pl330"))
+		reg = 0x20;
+	else if (of_device_is_compatible(dev->of_node, "calxeda,hb-xgmac")) {
+		res = platform_get_resource(to_platform_device(dev),
+					    IORESOURCE_MEM, 0);
+		if (res) {
+			if (res->start == 0xfff50000)
+				reg = 0;
+			else if (res->start == 0xfff51000)
+				reg = 4;
+		}
+	}
+
+	if (reg < 0)
+		return NOTIFY_DONE;
+
+	if (of_property_read_bool(dev->of_node, "dma-coherent")) {
+		writel(0xff31, sregs_base + reg);
+		set_dma_ops(dev, &arm_coherent_dma_ops);
+	} else
+		writel(0, sregs_base + reg);
+
+	return NOTIFY_OK;
+}
+
+static struct notifier_block highbank_amba_nb = {
+	.notifier_call = highbank_platform_notifier,
+};
+
+static struct notifier_block highbank_platform_nb = {
+	.notifier_call = highbank_platform_notifier,
+};
+
+static void __init highbank_init(void)
+{
+	pm_power_off = highbank_power_off;
+	highbank_pm_init();
+
+	bus_register_notifier(&platform_bus_type, &highbank_platform_nb);
+	bus_register_notifier(&amba_bustype, &highbank_amba_nb);
+
+	of_platform_populate(NULL, of_default_bus_match_table, NULL, NULL);
+}
+
+static const char *highbank_match[] __initconst = {
+	"calxeda,highbank",
+	"calxeda,ecx-2000",
+	NULL,
+};
+
+DT_MACHINE_START(HIGHBANK, "Highbank")
+	.smp		= smp_ops(highbank_smp_ops),
+	.map_io		= debug_ll_io_init,
+	.init_irq	= highbank_init_irq,
+	.init_time	= highbank_timer_init,
+	.init_machine	= highbank_init,
+	.dt_compat	= highbank_match,
+	.restart	= highbank_restart,
+MACHINE_END

arch/arm/mach-highbank/hotplug.c

@@ -0,0 +1,37 @@
+/*
+ * Copyright 2011 Calxeda, Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+#include <linux/kernel.h>
+#include <asm/cacheflush.h>
+
+#include "core.h"
+#include "sysregs.h"
+
+extern void secondary_startup(void);
+
+/*
+ * platform-specific code to shutdown a CPU
+ *
+ */
+void __ref highbank_cpu_die(unsigned int cpu)
+{
+	highbank_set_cpu_jump(cpu, phys_to_virt(0));
+
+	flush_cache_louis();
+	highbank_set_core_pwr();
+
+	while (1)
+		cpu_do_idle();
+}

arch/arm/mach-highbank/platsmp.c

@@ -0,0 +1,68 @@
+/*
+ * Copyright 2010-2011 Calxeda, Inc.
+ * Based on platsmp.c, Copyright (C) 2002 ARM Ltd.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+#include <linux/init.h>
+#include <linux/smp.h>
+#include <linux/io.h>
+
+#include <asm/smp_scu.h>
+
+#include "core.h"
+
+extern void secondary_startup(void);
+
+static int __cpuinit highbank_boot_secondary(unsigned int cpu, struct task_struct *idle)
+{
+	highbank_set_cpu_jump(cpu, secondary_startup);
+	arch_send_wakeup_ipi_mask(cpumask_of(cpu));
+	return 0;
+}
+
+/*
+ * Initialise the CPU possible map early - this describes the CPUs
+ * which may be present or become present in the system.
+ */
+static void __init highbank_smp_init_cpus(void)
+{
+	unsigned int i, ncores = 4;
+
+	/* sanity check */
+	if (ncores > NR_CPUS) {
+		printk(KERN_WARNING
+		       "highbank: no. of cores (%d) greater than configured "
+		       "maximum of %d - clipping\n",
+		       ncores, NR_CPUS);
+		ncores = NR_CPUS;
+	}
+
+	for (i = 0; i < ncores; i++)
+		set_cpu_possible(i, true);
+}
+
+static void __init highbank_smp_prepare_cpus(unsigned int max_cpus)
+{
+	if (scu_base_addr)
+		scu_enable(scu_base_addr);
+}
+
+struct smp_operations highbank_smp_ops __initdata = {
+	.smp_init_cpus		= highbank_smp_init_cpus,
+	.smp_prepare_cpus	= highbank_smp_prepare_cpus,
+	.smp_boot_secondary	= highbank_boot_secondary,
+#ifdef CONFIG_HOTPLUG_CPU
+	.cpu_die		= highbank_cpu_die,
+#endif
+};

arch/arm/mach-highbank/pm.c

@@ -0,0 +1,67 @@
+/*
+ * Copyright 2011 Calxeda, Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <linux/cpu_pm.h>
+#include <linux/init.h>
+#include <linux/io.h>
+#include <linux/suspend.h>
+
+#include <asm/cacheflush.h>
+#include <asm/proc-fns.h>
+#include <asm/suspend.h>
+
+#include "core.h"
+#include "sysregs.h"
+
+static int highbank_suspend_finish(unsigned long val)
+{
+	outer_flush_all();
+	outer_disable();
+
+	highbank_set_pwr_suspend();
+
+	cpu_do_idle();
+
+	highbank_clear_pwr_request();
+	return 0;
+}
+
+static int highbank_pm_enter(suspend_state_t state)
+{
+	cpu_pm_enter();
+	cpu_cluster_pm_enter();
+
+	highbank_set_cpu_jump(0, cpu_resume);
+	cpu_suspend(0, highbank_suspend_finish);
+
+	cpu_cluster_pm_exit();
+	cpu_pm_exit();
+
+	highbank_smc1(0x102, 0x1);
+	if (scu_base_addr)
+		scu_enable(scu_base_addr);
+	return 0;
+}
+
+static const struct platform_suspend_ops highbank_pm_ops = {
+	.enter = highbank_pm_enter,
+	.valid = suspend_valid_only_mem,
+};
+
+void __init highbank_pm_init(void)
+{
+	suspend_set_ops(&highbank_pm_ops);
+}

arch/arm/mach-highbank/smc.S

@@ -0,0 +1,27 @@
+/*
+ * Copied from omap44xx-smc.S Copyright (C) 2010 Texas Instruments, Inc.
+ * Copyright 2012 Calxeda, Inc.
+ *
+ * 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/linkage.h>
+
+/*
+ * This is common routine to manage secure monitor API
+ * used to modify the PL310 secure registers.
+ * 'r0' contains the value to be modified and 'r12' contains
+ * the monitor API number.
+ * Function signature : void highbank_smc1(u32 fn, u32 arg)
+ */
+
+ENTRY(highbank_smc1)
+	stmfd   sp!, {r4-r11, lr}
+	mov	r12, r0
+	mov 	r0, r1
+	dsb
+	smc	#0
+	ldmfd   sp!, {r4-r11, pc}
+ENDPROC(highbank_smc1)

arch/arm/mach-highbank/sysregs.h

@@ -0,0 +1,86 @@
+/*
+ * Copyright 2011 Calxeda, Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+#ifndef _MACH_HIGHBANK__SYSREGS_H_
+#define _MACH_HIGHBANK__SYSREGS_H_
+
+#include <linux/io.h>
+#include <linux/smp.h>
+#include <asm/smp_plat.h>
+#include <asm/smp_scu.h>
+#include "core.h"
+
+extern void __iomem *sregs_base;
+
+#define HB_SREG_A9_PWR_REQ		0xf00
+#define HB_SREG_A9_BOOT_STAT		0xf04
+#define HB_SREG_A9_BOOT_DATA		0xf08
+
+#define HB_PWR_SUSPEND			0
+#define HB_PWR_SOFT_RESET		1
+#define HB_PWR_HARD_RESET		2
+#define HB_PWR_SHUTDOWN			3
+
+#define SREG_CPU_PWR_CTRL(c)		(0x200 + ((c) * 4))
+
+static inline void highbank_set_core_pwr(void)
+{
+	int cpu = MPIDR_AFFINITY_LEVEL(cpu_logical_map(smp_processor_id()), 0);
+	if (scu_base_addr)
+		scu_power_mode(scu_base_addr, SCU_PM_POWEROFF);
+	else
+		writel_relaxed(1, sregs_base + SREG_CPU_PWR_CTRL(cpu));
+}
+
+static inline void highbank_clear_core_pwr(void)
+{
+	int cpu = MPIDR_AFFINITY_LEVEL(cpu_logical_map(smp_processor_id()), 0);
+	if (scu_base_addr)
+		scu_power_mode(scu_base_addr, SCU_PM_NORMAL);
+	else
+		writel_relaxed(0, sregs_base + SREG_CPU_PWR_CTRL(cpu));
+}
+
+static inline void highbank_set_pwr_suspend(void)
+{
+	writel(HB_PWR_SUSPEND, sregs_base + HB_SREG_A9_PWR_REQ);
+	highbank_set_core_pwr();
+}
+
+static inline void highbank_set_pwr_shutdown(void)
+{
+	writel(HB_PWR_SHUTDOWN, sregs_base + HB_SREG_A9_PWR_REQ);
+	highbank_set_core_pwr();
+}
+
+static inline void highbank_set_pwr_soft_reset(void)
+{
+	writel(HB_PWR_SOFT_RESET, sregs_base + HB_SREG_A9_PWR_REQ);
+	highbank_set_core_pwr();
+}
+
+static inline void highbank_set_pwr_hard_reset(void)
+{
+	writel(HB_PWR_HARD_RESET, sregs_base + HB_SREG_A9_PWR_REQ);
+	highbank_set_core_pwr();
+}
+
+static inline void highbank_clear_pwr_request(void)
+{
+	writel(~0UL, sregs_base + HB_SREG_A9_PWR_REQ);
+	highbank_clear_core_pwr();
+}
+
+#endif

arch/arm/mach-highbank/system.c

@@ -0,0 +1,32 @@
+/*
+ * Copyright 2011 Calxeda, Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+#include <linux/io.h>
+#include <asm/proc-fns.h>
+
+#include "core.h"
+#include "sysregs.h"
+
+void highbank_restart(char mode, const char *cmd)
+{
+	if (mode == 'h')
+		highbank_set_pwr_hard_reset();
+	else
+		highbank_set_pwr_soft_reset();
+
+	while (1)
+		cpu_do_idle();
+}
+