2 * Copyright (C) 2012 Altera Corporation
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation; either version 2 of the License, or
7 * (at your option) any later version.
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
14 * You should have received a copy of the GNU General Public License
15 * along with this program. If not, see <http://www.gnu.org/licenses/>.
17 #include <linux/clk-provider.h>
18 #include <linux/irqchip.h>
19 #include <linux/of_address.h>
20 #include <linux/of_irq.h>
21 #include <linux/of_platform.h>
22 #include <linux/reboot.h>
24 #include <asm/hardware/cache-l2x0.h>
25 #include <asm/mach/arch.h>
26 #include <asm/mach/map.h>
30 void __iomem
*socfpga_scu_base_addr
= ((void __iomem
*)(SOCFPGA_SCU_VIRT_BASE
));
31 void __iomem
*sys_manager_base_addr
;
32 void __iomem
*rst_manager_base_addr
;
33 void __iomem
*clk_mgr_base_addr
;
34 unsigned long cpu1start_addr
;
36 static struct map_desc scu_io_desc __initdata
= {
37 .virtual = SOCFPGA_SCU_VIRT_BASE
,
38 .pfn
= 0, /* run-time */
43 static struct map_desc uart_io_desc __initdata
= {
44 .virtual = 0xfec02000,
45 .pfn
= __phys_to_pfn(0xffc02000),
50 static void __init
socfpga_scu_map_io(void)
55 asm("mrc p15, 4, %0, c15, c0, 0" : "=r" (base
));
57 scu_io_desc
.pfn
= __phys_to_pfn(base
);
58 iotable_init(&scu_io_desc
, 1);
61 static void __init
socfpga_map_io(void)
64 iotable_init(&uart_io_desc
, 1);
65 early_printk("Early printk initialized\n");
68 void __init
socfpga_sysmgr_init(void)
70 struct device_node
*np
;
72 np
= of_find_compatible_node(NULL
, NULL
, "altr,sys-mgr");
74 if (of_property_read_u32(np
, "cpu1-start-addr",
75 (u32
*) &cpu1start_addr
))
76 pr_err("SMP: Need cpu1-start-addr in device tree.\n");
78 sys_manager_base_addr
= of_iomap(np
, 0);
80 np
= of_find_compatible_node(NULL
, NULL
, "altr,rst-mgr");
81 rst_manager_base_addr
= of_iomap(np
, 0);
83 np
= of_find_compatible_node(NULL
, NULL
, "altr,clk-mgr");
84 clk_mgr_base_addr
= of_iomap(np
, 0);
87 static void __init
socfpga_init_irq(void)
90 socfpga_sysmgr_init();
93 static void socfpga_cyclone5_restart(enum reboot_mode mode
, const char *cmd
)
97 temp
= readl(rst_manager_base_addr
+ SOCFPGA_RSTMGR_CTRL
);
99 if (mode
== REBOOT_HARD
)
100 temp
|= RSTMGR_CTRL_SWCOLDRSTREQ
;
102 temp
|= RSTMGR_CTRL_SWWARMRSTREQ
;
103 writel(temp
, rst_manager_base_addr
+ SOCFPGA_RSTMGR_CTRL
);
106 static void __init
socfpga_cyclone5_init(void)
108 l2x0_of_init(0, ~0UL);
109 of_platform_populate(NULL
, of_default_bus_match_table
, NULL
, NULL
);
111 socfpga_init_clocks();
114 static const char *altera_dt_match
[] = {
119 DT_MACHINE_START(SOCFPGA
, "Altera SOCFPGA")
120 .smp
= smp_ops(socfpga_smp_ops
),
121 .map_io
= socfpga_map_io
,
122 .init_irq
= socfpga_init_irq
,
123 .init_machine
= socfpga_cyclone5_init
,
124 .restart
= socfpga_cyclone5_restart
,
125 .dt_compat
= altera_dt_match
,