1/*
  2 *  Copyright (C) 2012-2015 Altera Corporation
  3 *
  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.
  8 *
  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.
 13 *
 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/>.
 16 */
 17#include <linux/irqchip.h>
 18#include <linux/of_address.h>
 19#include <linux/of_irq.h>
 20#include <linux/of_platform.h>
 21#include <linux/reboot.h>
 22
 23#include <asm/hardware/cache-l2x0.h>
 24#include <asm/mach/arch.h>
 25#include <asm/mach/map.h>
 26#include <asm/cacheflush.h>
 27
 28#include "core.h"
 29
 30void __iomem *sys_manager_base_addr;
 31void __iomem *rst_manager_base_addr;
 32void __iomem *sdr_ctl_base_addr;
 33unsigned long socfpga_cpu1start_addr;
 34
 35void __init socfpga_sysmgr_init(void)
 36{
 37	struct device_node *np;
 38
 39	np = of_find_compatible_node(NULL, NULL, "altr,sys-mgr");
 40
 41	if (of_property_read_u32(np, "cpu1-start-addr",
 42			(u32 *) &socfpga_cpu1start_addr))
 43		pr_err("SMP: Need cpu1-start-addr in device tree.\n");
 44
 45	/* Ensure that socfpga_cpu1start_addr is visible to other CPUs */
 46	smp_wmb();
 47	sync_cache_w(&socfpga_cpu1start_addr);
 48
 49	sys_manager_base_addr = of_iomap(np, 0);
 50
 51	np = of_find_compatible_node(NULL, NULL, "altr,rst-mgr");
 52	rst_manager_base_addr = of_iomap(np, 0);
 53
 54	np = of_find_compatible_node(NULL, NULL, "altr,sdr-ctl");
 55	sdr_ctl_base_addr = of_iomap(np, 0);
 56}
 57
 58static void __init socfpga_init_irq(void)
 59{
 60	irqchip_init();
 61	socfpga_sysmgr_init();
 62	if (IS_ENABLED(CONFIG_EDAC_ALTERA_L2C))
 63		socfpga_init_l2_ecc();
 64
 65	if (IS_ENABLED(CONFIG_EDAC_ALTERA_OCRAM))
 66		socfpga_init_ocram_ecc();
 67}
 68
 69static void socfpga_cyclone5_restart(enum reboot_mode mode, const char *cmd)
 70{
 71	u32 temp;
 72
 73	temp = readl(rst_manager_base_addr + SOCFPGA_RSTMGR_CTRL);
 74
 75	if (mode == REBOOT_HARD)
 76		temp |= RSTMGR_CTRL_SWCOLDRSTREQ;
 77	else
 78		temp |= RSTMGR_CTRL_SWWARMRSTREQ;
 79	writel(temp, rst_manager_base_addr + SOCFPGA_RSTMGR_CTRL);
 80}
 81
 82static void socfpga_arria10_restart(enum reboot_mode mode, const char *cmd)
 83{
 84	u32 temp;
 85
 86	temp = readl(rst_manager_base_addr + SOCFPGA_A10_RSTMGR_CTRL);
 87
 88	if (mode == REBOOT_HARD)
 89		temp |= RSTMGR_CTRL_SWCOLDRSTREQ;
 90	else
 91		temp |= RSTMGR_CTRL_SWWARMRSTREQ;
 92	writel(temp, rst_manager_base_addr + SOCFPGA_A10_RSTMGR_CTRL);
 93}
 94
 95static const char *altera_dt_match[] = {
 96	"altr,socfpga",
 97	NULL
 98};
 99
100DT_MACHINE_START(SOCFPGA, "Altera SOCFPGA")
101	.l2c_aux_val	= 0,
102	.l2c_aux_mask	= ~0,
103	.init_irq	= socfpga_init_irq,
104	.restart	= socfpga_cyclone5_restart,
105	.dt_compat	= altera_dt_match,
106MACHINE_END
107
108static const char *altera_a10_dt_match[] = {
109	"altr,socfpga-arria10",
110	NULL
111};
112
113DT_MACHINE_START(SOCFPGA_A10, "Altera SOCFPGA Arria10")
114	.l2c_aux_val	= 0,
115	.l2c_aux_mask	= ~0,
116	.init_irq	= socfpga_init_irq,
117	.restart	= socfpga_arria10_restart,
118	.dt_compat	= altera_a10_dt_match,
119MACHINE_END