1/*
  2 * Copyright (C) ST-Ericsson SA 2010
  3 *
  4 * Author: Rabin Vincent <rabin.vincent@stericsson.com> for ST-Ericsson
  5 * Author: Lee Jones <lee.jones@linaro.org> for ST-Ericsson
  6 * License terms: GNU General Public License (GPL) version 2
  7 */
  8
  9#include <linux/platform_device.h>
 10#include <linux/io.h>
 11#include <linux/mfd/dbx500-prcmu.h>
 12#include <linux/sys_soc.h>
 13#include <linux/err.h>
 14#include <linux/slab.h>
 15#include <linux/stat.h>
 16#include <linux/of.h>
 17#include <linux/of_irq.h>
 18#include <linux/of_address.h>
 19#include <linux/irq.h>
 20#include <linux/irqchip.h>
 21#include <linux/irqchip/arm-gic.h>
 22#include <linux/platform_data/clk-ux500.h>
 23#include <linux/platform_data/arm-ux500-pm.h>
 24
 25#include <asm/mach/map.h>
 26
 27#include "setup.h"
 28
 29#include "board-mop500.h"
 30#include "db8500-regs.h"
 31#include "id.h"
 32
 33void ux500_restart(enum reboot_mode mode, const char *cmd)
 34{
 35	local_irq_disable();
 36	local_fiq_disable();
 37
 38	prcmu_system_reset(0);
 39}
 40
 41/*
 42 * FIXME: Should we set up the GPIO domain here?
 43 *
 44 * The problem is that we cannot put the interrupt resources into the platform
 45 * device until the irqdomain has been added. Right now, we set the GIC interrupt
 46 * domain from init_irq(), then load the gpio driver from
 47 * core_initcall(nmk_gpio_init) and add the platform devices from
 48 * arch_initcall(customize_machine).
 49 *
 50 * This feels fragile because it depends on the gpio device getting probed
 51 * _before_ any device uses the gpio interrupts.
 52*/
 53void __init ux500_init_irq(void)
 54{
 55	struct device_node *np;
 56	struct resource r;
 57
 58	irqchip_init();
 59	np = of_find_compatible_node(NULL, NULL, "stericsson,db8500-prcmu");
 60	of_address_to_resource(np, 0, &r);
 61	of_node_put(np);
 62	if (!r.start) {
 63		pr_err("could not find PRCMU base resource\n");
 64		return;
 65	}
 66	prcmu_early_init(r.start, r.end-r.start);
 67	ux500_pm_init(r.start, r.end-r.start);
 68
 69	/*
 70	 * Init clocks here so that they are available for system timer
 71	 * initialization.
 72	 */
 73	if (cpu_is_u8500_family())
 74		u8500_clk_init();
 75	else if (cpu_is_u9540())
 76		u9540_clk_init();
 77	else if (cpu_is_u8540())
 78		u8540_clk_init();
 79}
 80
 81static const char * __init ux500_get_machine(void)
 82{
 83	return kasprintf(GFP_KERNEL, "DB%4x", dbx500_partnumber());
 84}
 85
 86static const char * __init ux500_get_family(void)
 87{
 88	return kasprintf(GFP_KERNEL, "ux500");
 89}
 90
 91static const char * __init ux500_get_revision(void)
 92{
 93	unsigned int rev = dbx500_revision();
 94
 95	if (rev == 0x01)
 96		return kasprintf(GFP_KERNEL, "%s", "ED");
 97	else if (rev >= 0xA0)
 98		return kasprintf(GFP_KERNEL, "%d.%d",
 99				 (rev >> 4) - 0xA + 1, rev & 0xf);
100
101	return kasprintf(GFP_KERNEL, "%s", "Unknown");
102}
103
104static ssize_t ux500_get_process(struct device *dev,
105					struct device_attribute *attr,
106					char *buf)
107{
108	if (dbx500_id.process == 0x00)
109		return sprintf(buf, "Standard\n");
110
111	return sprintf(buf, "%02xnm\n", dbx500_id.process);
112}
113
114static void __init soc_info_populate(struct soc_device_attribute *soc_dev_attr,
115				     const char *soc_id)
116{
117	soc_dev_attr->soc_id   = soc_id;
118	soc_dev_attr->machine  = ux500_get_machine();
119	soc_dev_attr->family   = ux500_get_family();
120	soc_dev_attr->revision = ux500_get_revision();
121}
122
123static const struct device_attribute ux500_soc_attr =
124	__ATTR(process,  S_IRUGO, ux500_get_process,  NULL);
125
126struct device * __init ux500_soc_device_init(const char *soc_id)
127{
128	struct device *parent;
129	struct soc_device *soc_dev;
130	struct soc_device_attribute *soc_dev_attr;
131
132	soc_dev_attr = kzalloc(sizeof(*soc_dev_attr), GFP_KERNEL);
133	if (!soc_dev_attr)
134		return ERR_PTR(-ENOMEM);
135
136	soc_info_populate(soc_dev_attr, soc_id);
137
138	soc_dev = soc_device_register(soc_dev_attr);
139	if (IS_ERR(soc_dev)) {
140	        kfree(soc_dev_attr);
141		return NULL;
142	}
143
144	parent = soc_device_to_device(soc_dev);
145	device_create_file(parent, &ux500_soc_attr);
146
147	return parent;
148}