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/clk-provider.h>
29 #include <asm/cacheflush.h>
30 #include <asm/cputype.h>
31 #include <asm/smp_plat.h>
32 #include <asm/hardware/cache-l2x0.h>
33 #include <asm/mach/arch.h>
34 #include <asm/mach/map.h>
39 void __iomem *sregs_base;
40 void __iomem *scu_base_addr;
42 static void __init highbank_scu_map_io(void)
47 asm("mrc p15, 4, %0, c15, c0, 0" : "=r" (base));
49 scu_base_addr = ioremap(base, SZ_4K);
52 #define HB_JUMP_TABLE_PHYS(cpu) (0x40 + (0x10 * (cpu)))
53 #define HB_JUMP_TABLE_VIRT(cpu) phys_to_virt(HB_JUMP_TABLE_PHYS(cpu))
55 void highbank_set_cpu_jump(int cpu, void *jump_addr)
57 cpu = MPIDR_AFFINITY_LEVEL(cpu_logical_map(cpu), 0);
58 writel(virt_to_phys(jump_addr), HB_JUMP_TABLE_VIRT(cpu));
59 __cpuc_flush_dcache_area(HB_JUMP_TABLE_VIRT(cpu), 16);
60 outer_clean_range(HB_JUMP_TABLE_PHYS(cpu),
61 HB_JUMP_TABLE_PHYS(cpu) + 15);
64 static void highbank_l2x0_disable(void)
66 /* Disable PL310 L2 Cache controller */
67 highbank_smc1(0x102, 0x0);
70 static void __init highbank_init_irq(void)
74 if (of_find_compatible_node(NULL, NULL, "arm,cortex-a9"))
75 highbank_scu_map_io();
77 /* Enable PL310 L2 Cache controller */
78 if (IS_ENABLED(CONFIG_CACHE_L2X0) &&
79 of_find_compatible_node(NULL, NULL, "arm,pl310-cache")) {
80 highbank_smc1(0x102, 0x1);
81 l2x0_of_init(0, ~0UL);
82 outer_cache.disable = highbank_l2x0_disable;
86 static void __init highbank_timer_init(void)
88 struct device_node *np;
90 /* Map system registers */
91 np = of_find_compatible_node(NULL, NULL, "calxeda,hb-sregs");
92 sregs_base = of_iomap(np, 0);
97 clocksource_of_init();
100 static void highbank_power_off(void)
102 highbank_set_pwr_shutdown();
108 static int highbank_platform_notifier(struct notifier_block *nb,
109 unsigned long event, void *__dev)
111 struct resource *res;
114 struct device *dev = __dev;
116 if (event != BUS_NOTIFY_ADD_DEVICE)
119 if (of_device_is_compatible(dev->of_node, "calxeda,hb-ahci"))
121 else if (of_device_is_compatible(dev->of_node, "calxeda,hb-sdhci"))
123 else if (of_device_is_compatible(dev->of_node, "arm,pl330"))
125 else if (of_device_is_compatible(dev->of_node, "calxeda,hb-xgmac")) {
126 res = platform_get_resource(to_platform_device(dev),
129 if (res->start == 0xfff50000)
131 else if (res->start == 0xfff51000)
139 if (of_property_read_bool(dev->of_node, "dma-coherent")) {
140 val = readl(sregs_base + reg);
141 writel(val | 0xff01, sregs_base + reg);
142 set_dma_ops(dev, &arm_coherent_dma_ops);
148 static struct notifier_block highbank_amba_nb = {
149 .notifier_call = highbank_platform_notifier,
152 static struct notifier_block highbank_platform_nb = {
153 .notifier_call = highbank_platform_notifier,
156 static void __init highbank_init(void)
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 of_platform_populate(NULL, of_default_bus_match_table, NULL, NULL);
167 static const char *highbank_match[] __initconst = {
173 DT_MACHINE_START(HIGHBANK, "Highbank")
174 #if defined(CONFIG_ZONE_DMA) && defined(CONFIG_ARM_LPAE)
175 .dma_zone_size = (4ULL * SZ_1G),
177 .smp = smp_ops(highbank_smp_ops),
178 .init_irq = highbank_init_irq,
179 .init_time = highbank_timer_init,
180 .init_machine = highbank_init,
181 .dt_compat = highbank_match,
182 .restart = highbank_restart,