2011-07-26 03:19:06 -06:00
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/*
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* Versatile board support using the device tree
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*
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* Copyright (C) 2010 Secret Lab Technologies Ltd.
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* Copyright (C) 2009 Jeremy Kerr <jeremy.kerr@canonical.com>
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* Copyright (C) 2004 ARM Limited
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* Copyright (C) 2000 Deep Blue Solutions Ltd
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include <linux/init.h>
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2015-12-08 13:44:15 -07:00
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#include <linux/io.h>
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#include <linux/of.h>
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#include <linux/of_address.h>
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2011-07-26 03:19:06 -06:00
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#include <linux/of_irq.h>
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#include <linux/of_platform.h>
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2015-12-08 13:44:15 -07:00
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#include <linux/slab.h>
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2011-07-26 03:19:06 -06:00
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#include <asm/mach-types.h>
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#include <asm/mach/arch.h>
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#include "core.h"
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2015-12-08 13:44:15 -07:00
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#define VERSATILE_SYS_PCICTL_OFFSET 0x44
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static void __iomem *versatile_sys_base;
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static void __init versatile_dt_pci_init(void)
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{
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u32 val;
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struct device_node *np;
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struct property *newprop;
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np = of_find_compatible_node(NULL, NULL, "arm,versatile-pci");
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if (!np)
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return;
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/* Check if PCI backplane is detected */
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val = readl(versatile_sys_base + VERSATILE_SYS_PCICTL_OFFSET);
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if (val & 1) {
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/*
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* Enable PCI accesses. Note that the documentaton is
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* inconsistent whether or not this is needed, but the old
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* driver had it so we will keep it.
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*/
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writel(1, versatile_sys_base + VERSATILE_SYS_PCICTL_OFFSET);
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return;
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}
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newprop = kzalloc(sizeof(*newprop), GFP_KERNEL);
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if (!newprop)
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return;
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newprop->name = kstrdup("status", GFP_KERNEL);
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newprop->value = kstrdup("disabled", GFP_KERNEL);
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newprop->length = sizeof("disabled");
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of_update_property(np, newprop);
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pr_info("Not plugged into PCI backplane!\n");
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}
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2011-07-26 03:19:06 -06:00
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static void __init versatile_dt_init(void)
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{
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2015-12-08 13:44:15 -07:00
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struct device_node *np;
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np = of_find_compatible_node(NULL, NULL, "arm,core-module-versatile");
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if (np)
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versatile_sys_base = of_iomap(np, 0);
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WARN_ON(!versatile_sys_base);
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versatile_dt_pci_init();
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2015-12-08 13:44:16 -07:00
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platform_device_register(&versatile_flash_device);
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2011-07-26 03:19:06 -06:00
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of_platform_populate(NULL, of_default_bus_match_table,
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versatile_auxdata_lookup, NULL);
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}
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2015-02-18 13:01:45 -07:00
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static const char *const versatile_dt_match[] __initconst = {
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2011-07-26 03:19:06 -06:00
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"arm,versatile-ab",
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"arm,versatile-pb",
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NULL,
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};
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DT_MACHINE_START(VERSATILE_PB, "ARM-Versatile (Device Tree Support)")
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.map_io = versatile_map_io,
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.init_early = versatile_init_early,
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.init_machine = versatile_dt_init,
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.dt_compat = versatile_dt_match,
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2011-11-03 05:43:08 -06:00
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.restart = versatile_restart,
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2011-07-26 03:19:06 -06:00
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MACHINE_END
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