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/*
* 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/irqchip.h>
#include <linux/of.h>
#include <linux/of_irq.h>
#include <linux/of_platform.h>
#include <linux/of_address.h>
#include <linux/amba/bus.h>
#include <linux/clk-provider.h>
#include <linux/platform_device.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 "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);
}
static void highbank_l2x0_disable(void)
{
/* Disable PL310 L2 Cache controller */
highbank_smc1(0x102, 0x0);
}
static void __init highbank_init_irq(void)
{
irqchip_init();
if (of_find_compatible_node(NULL, NULL, "arm,cortex-a9"))
highbank_scu_map_io();
/* Enable PL310 L2 Cache controller */
if (IS_ENABLED(CONFIG_CACHE_L2X0) &&
of_find_compatible_node(NULL, NULL, "arm,pl310-cache")) {
highbank_smc1(0x102, 0x1);
l2x0_of_init(0, ~0UL);
outer_cache.disable = highbank_l2x0_disable;
}
}
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;
u32 val;
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")) {
val = readl(sregs_base + reg);
writel(val | 0xff01, sregs_base + reg);
set_dma_ops(dev, &arm_coherent_dma_ops);
}
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 struct platform_device highbank_cpuidle_device = {
.name = "cpuidle-calxeda",
};
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);
if (of_machine_is_compatible("calxeda,highbank"))
platform_device_register(&highbank_cpuidle_device);
}
static const char *highbank_match[] __initconst = {
"calxeda,highbank",
"calxeda,ecx-2000",
NULL,
};
DT_MACHINE_START(HIGHBANK, "Highbank")
#if defined(CONFIG_ZONE_DMA) && defined(CONFIG_ARM_LPAE)
.dma_zone_size = (4ULL * SZ_1G),
#endif
.smp = smp_ops(highbank_smp_ops),
.init_irq = highbank_init_irq,
.init_time = highbank_timer_init,
.init_machine = highbank_init,
.dt_compat = highbank_match,
.restart = highbank_restart,
MACHINE_END
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