mirror of https://gitee.com/openkylin/linux.git
190 lines
4.5 KiB
C
190 lines
4.5 KiB
C
/*
|
|
* 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/input.h>
|
|
#include <linux/io.h>
|
|
#include <linux/irqchip.h>
|
|
#include <linux/pl320-ipc.h>
|
|
#include <linux/of.h>
|
|
#include <linux/of_irq.h>
|
|
#include <linux/of_platform.h>
|
|
#include <linux/of_address.h>
|
|
#include <linux/reboot.h>
|
|
#include <linux/amba/bus.h>
|
|
#include <linux/platform_device.h>
|
|
|
|
#include <asm/psci.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);
|
|
}
|
|
|
|
|
|
static void highbank_l2c310_write_sec(unsigned long val, unsigned reg)
|
|
{
|
|
if (reg == L2X0_CTRL)
|
|
highbank_smc1(0x102, val);
|
|
else
|
|
WARN_ONCE(1, "Highbank L2C310: ignoring write to reg 0x%x\n",
|
|
reg);
|
|
}
|
|
|
|
static void __init highbank_init_irq(void)
|
|
{
|
|
irqchip_init();
|
|
|
|
if (of_find_compatible_node(NULL, NULL, "arm,cortex-a9"))
|
|
highbank_scu_map_io();
|
|
}
|
|
|
|
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 int hb_keys_notifier(struct notifier_block *nb, unsigned long event, void *data)
|
|
{
|
|
u32 key = *(u32 *)data;
|
|
|
|
if (event != 0x1000)
|
|
return 0;
|
|
|
|
if (key == KEY_POWER)
|
|
orderly_poweroff(false);
|
|
else if (key == 0xffff)
|
|
ctrl_alt_del();
|
|
|
|
return 0;
|
|
}
|
|
static struct notifier_block hb_keys_nb = {
|
|
.notifier_call = hb_keys_notifier,
|
|
};
|
|
|
|
static void __init highbank_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);
|
|
|
|
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);
|
|
|
|
pl320_ipc_register_notifier(&hb_keys_nb);
|
|
|
|
of_platform_populate(NULL, of_default_bus_match_table, NULL, NULL);
|
|
|
|
if (psci_ops.cpu_suspend)
|
|
platform_device_register(&highbank_cpuidle_device);
|
|
}
|
|
|
|
static const char *const 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
|
|
.l2c_aux_val = 0,
|
|
.l2c_aux_mask = ~0,
|
|
.l2c_write_sec = highbank_l2c310_write_sec,
|
|
.init_irq = highbank_init_irq,
|
|
.init_machine = highbank_init,
|
|
.dt_compat = highbank_match,
|
|
.restart = highbank_restart,
|
|
MACHINE_END
|