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>
21 #include <linux/irqchip.h>
23 #include <linux/of_irq.h>
24 #include <linux/of_platform.h>
25 #include <linux/of_address.h>
26 #include <linux/amba/bus.h>
27 #include <linux/platform_device.h>
30 #include <asm/hardware/cache-l2x0.h>
31 #include <asm/mach/arch.h>
32 #include <asm/mach/map.h>
37 void __iomem *sregs_base;
38 void __iomem *scu_base_addr;
40 static void __init highbank_scu_map_io(void)
45 asm("mrc p15, 4, %0, c15, c0, 0" : "=r" (base));
47 scu_base_addr = ioremap(base, SZ_4K);
51 static void highbank_l2x0_disable(void)
53 /* Disable PL310 L2 Cache controller */
54 highbank_smc1(0x102, 0x0);
57 static void __init highbank_init_irq(void)
61 if (of_find_compatible_node(NULL, NULL, "arm,cortex-a9"))
62 highbank_scu_map_io();
64 /* Enable PL310 L2 Cache controller */
65 if (IS_ENABLED(CONFIG_CACHE_L2X0) &&
66 of_find_compatible_node(NULL, NULL, "arm,pl310-cache")) {
67 highbank_smc1(0x102, 0x1);
68 l2x0_of_init(0, ~0UL);
69 outer_cache.disable = highbank_l2x0_disable;
73 static void highbank_power_off(void)
75 highbank_set_pwr_shutdown();
81 static int highbank_platform_notifier(struct notifier_block *nb,
82 unsigned long event, void *__dev)
87 struct device *dev = __dev;
89 if (event != BUS_NOTIFY_ADD_DEVICE)
92 if (of_device_is_compatible(dev->of_node, "calxeda,hb-ahci"))
94 else if (of_device_is_compatible(dev->of_node, "calxeda,hb-sdhci"))
96 else if (of_device_is_compatible(dev->of_node, "arm,pl330"))
98 else if (of_device_is_compatible(dev->of_node, "calxeda,hb-xgmac")) {
99 res = platform_get_resource(to_platform_device(dev),
102 if (res->start == 0xfff50000)
104 else if (res->start == 0xfff51000)
112 if (of_property_read_bool(dev->of_node, "dma-coherent")) {
113 val = readl(sregs_base + reg);
114 writel(val | 0xff01, sregs_base + reg);
115 set_dma_ops(dev, &arm_coherent_dma_ops);
121 static struct notifier_block highbank_amba_nb = {
122 .notifier_call = highbank_platform_notifier,
125 static struct notifier_block highbank_platform_nb = {
126 .notifier_call = highbank_platform_notifier,
129 static struct platform_device highbank_cpuidle_device = {
130 .name = "cpuidle-calxeda",
133 static void __init highbank_init(void)
135 struct device_node *np;
137 /* Map system registers */
138 np = of_find_compatible_node(NULL, NULL, "calxeda,hb-sregs");
139 sregs_base = of_iomap(np, 0);
140 WARN_ON(!sregs_base);
142 pm_power_off = highbank_power_off;
145 bus_register_notifier(&platform_bus_type, &highbank_platform_nb);
146 bus_register_notifier(&amba_bustype, &highbank_amba_nb);
148 of_platform_populate(NULL, of_default_bus_match_table, NULL, NULL);
150 if (psci_ops.cpu_suspend)
151 platform_device_register(&highbank_cpuidle_device);
154 static const char *highbank_match[] __initconst = {
160 DT_MACHINE_START(HIGHBANK, "Highbank")
161 #if defined(CONFIG_ZONE_DMA) && defined(CONFIG_ARM_LPAE)
162 .dma_zone_size = (4ULL * SZ_1G),
164 .init_irq = highbank_init_irq,
165 .init_machine = highbank_init,
166 .dt_compat = highbank_match,
167 .restart = highbank_restart,