summaryrefslogtreecommitdiffstats
path: root/kernel/arch/arm/mach-highbank/highbank.c
diff options
context:
space:
mode:
Diffstat (limited to 'kernel/arch/arm/mach-highbank/highbank.c')
-rw-r--r--kernel/arch/arm/mach-highbank/highbank.c189
1 files changed, 189 insertions, 0 deletions
diff --git a/kernel/arch/arm/mach-highbank/highbank.c b/kernel/arch/arm/mach-highbank/highbank.c
new file mode 100644
index 000000000..231fba0d0
--- /dev/null
+++ b/kernel/arch/arm/mach-highbank/highbank.c
@@ -0,0 +1,189 @@
+/*
+ * 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