2 * Copyright 2010-2011 Calxeda, Inc.
4 * This program is free software; you can redistribute it and/or modify it
5 * under the terms and conditions of the GNU General Public License,
6 * version 2, as published by the Free Software Foundation.
8 * This program is distributed in the hope it will be useful, but WITHOUT
9 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
10 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
13 * You should have received a copy of the GNU General Public License along with
14 * this program. If not, see <http://www.gnu.org/licenses/>.
16 #include <linux/clk.h>
17 #include <linux/clkdev.h>
18 #include <linux/clocksource.h>
19 #include <linux/dma-mapping.h>
20 #include <linux/input.h>
22 #include <linux/irqchip.h>
23 #include <linux/pl320-ipc.h>
25 #include <linux/of_irq.h>
26 #include <linux/of_platform.h>
27 #include <linux/of_address.h>
28 #include <linux/reboot.h>
29 #include <linux/amba/bus.h>
30 #include <linux/platform_device.h>
31 #include <linux/psci.h>
33 #include <asm/hardware/cache-l2x0.h>
34 #include <asm/mach/arch.h>
35 #include <asm/mach/map.h>
40 void __iomem *sregs_base;
41 void __iomem *scu_base_addr;
43 static void __init highbank_scu_map_io(void)
48 asm("mrc p15, 4, %0, c15, c0, 0" : "=r" (base));
50 scu_base_addr = ioremap(base, SZ_4K);
54 static void highbank_l2c310_write_sec(unsigned long val, unsigned reg)
57 highbank_smc1(0x102, val);
59 WARN_ONCE(1, "Highbank L2C310: ignoring write to reg 0x%x\n",
63 static void __init highbank_init_irq(void)
67 if (of_find_compatible_node(NULL, NULL, "arm,cortex-a9"))
68 highbank_scu_map_io();
71 static void highbank_power_off(void)
73 highbank_set_pwr_shutdown();
79 static int highbank_platform_notifier(struct notifier_block *nb,
80 unsigned long event, void *__dev)
85 struct device *dev = __dev;
87 if (event != BUS_NOTIFY_ADD_DEVICE)
90 if (of_device_is_compatible(dev->of_node, "calxeda,hb-ahci"))
92 else if (of_device_is_compatible(dev->of_node, "calxeda,hb-sdhci"))
94 else if (of_device_is_compatible(dev->of_node, "arm,pl330"))
96 else if (of_device_is_compatible(dev->of_node, "calxeda,hb-xgmac")) {
97 res = platform_get_resource(to_platform_device(dev),
100 if (res->start == 0xfff50000)
102 else if (res->start == 0xfff51000)
110 if (of_property_read_bool(dev->of_node, "dma-coherent")) {
111 val = readl(sregs_base + reg);
112 writel(val | 0xff01, sregs_base + reg);
113 set_dma_ops(dev, &arm_coherent_dma_ops);
119 static struct notifier_block highbank_amba_nb = {
120 .notifier_call = highbank_platform_notifier,
123 static struct notifier_block highbank_platform_nb = {
124 .notifier_call = highbank_platform_notifier,
127 static struct platform_device highbank_cpuidle_device = {
128 .name = "cpuidle-calxeda",
131 static int hb_keys_notifier(struct notifier_block *nb, unsigned long event, void *data)
133 u32 key = *(u32 *)data;
138 if (key == KEY_POWER)
139 orderly_poweroff(false);
140 else if (key == 0xffff)
145 static struct notifier_block hb_keys_nb = {
146 .notifier_call = hb_keys_notifier,
149 static void __init highbank_init(void)
151 struct device_node *np;
153 /* Map system registers */
154 np = of_find_compatible_node(NULL, NULL, "calxeda,hb-sregs");
155 sregs_base = of_iomap(np, 0);
156 WARN_ON(!sregs_base);
158 pm_power_off = highbank_power_off;
161 bus_register_notifier(&platform_bus_type, &highbank_platform_nb);
162 bus_register_notifier(&amba_bustype, &highbank_amba_nb);
164 pl320_ipc_register_notifier(&hb_keys_nb);
166 of_platform_populate(NULL, of_default_bus_match_table, NULL, NULL);
168 if (psci_ops.cpu_suspend)
169 platform_device_register(&highbank_cpuidle_device);
172 static const char *const highbank_match[] __initconst = {
178 DT_MACHINE_START(HIGHBANK, "Highbank")
179 #if defined(CONFIG_ZONE_DMA) && defined(CONFIG_ARM_LPAE)
180 .dma_zone_size = (4ULL * SZ_1G),
184 .l2c_write_sec = highbank_l2c310_write_sec,
185 .init_irq = highbank_init_irq,
186 .init_machine = highbank_init,
187 .dt_compat = highbank_match,
188 .restart = highbank_restart,