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/clksrc-dbx500-prcmu.h>
13#include <linux/sys_soc.h>
14#include <linux/err.h>
15#include <linux/slab.h>
16#include <linux/stat.h>
17#include <linux/of.h>
18#include <linux/of_irq.h>
19#include <linux/of_address.h>
20#include <linux/irq.h>
21#include <linux/irqchip.h>
22#include <linux/irqchip/arm-gic.h>
23#include <linux/platform_data/clk-ux500.h>
24#include <linux/platform_data/arm-ux500-pm.h>
25
26#include <asm/mach/map.h>
27
28#include "setup.h"
29
30#include "board-mop500.h"
31#include "db8500-regs.h"
32#include "id.h"
33
34void ux500_restart(enum reboot_mode mode, const char *cmd)
35{
36	local_irq_disable();
37	local_fiq_disable();
38
39	prcmu_system_reset(0);
40}
41
42/*
43 * FIXME: Should we set up the GPIO domain here?
44 *
45 * The problem is that we cannot put the interrupt resources into the platform
46 * device until the irqdomain has been added. Right now, we set the GIC interrupt
47 * domain from init_irq(), then load the gpio driver from
48 * core_initcall(nmk_gpio_init) and add the platform devices from
49 * arch_initcall(customize_machine).
50 *
51 * This feels fragile because it depends on the gpio device getting probed
52 * _before_ any device uses the gpio interrupts.
53*/
54void __init ux500_init_irq(void)
55{
56	struct device_node *np;
57	struct resource r;
58
59	irqchip_init();
60	np = of_find_compatible_node(NULL, NULL, "stericsson,db8500-prcmu");
61	of_address_to_resource(np, 0, &r);
62	of_node_put(np);
63	if (!r.start) {
64		pr_err("could not find PRCMU base resource\n");
65		return;
66	}
67	prcmu_early_init(r.start, r.end-r.start);
68	ux500_pm_init(r.start, r.end-r.start);
69
70	/*
71	 * Init clocks here so that they are available for system timer
72	 * initialization.
73	 */
74	if (cpu_is_u8500_family())
75		u8500_clk_init();
76	else if (cpu_is_u9540())
77		u9540_clk_init();
78	else if (cpu_is_u8540())
79		u8540_clk_init();
80}
81
82static const char * __init ux500_get_machine(void)
83{
84	return kasprintf(GFP_KERNEL, "DB%4x", dbx500_partnumber());
85}
86
87static const char * __init ux500_get_family(void)
88{
89	return kasprintf(GFP_KERNEL, "ux500");
90}
91
92static const char * __init ux500_get_revision(void)
93{
94	unsigned int rev = dbx500_revision();
95
96	if (rev == 0x01)
97		return kasprintf(GFP_KERNEL, "%s", "ED");
98	else if (rev >= 0xA0)
99		return kasprintf(GFP_KERNEL, "%d.%d",
100				 (rev >> 4) - 0xA + 1, rev & 0xf);
101
102	return kasprintf(GFP_KERNEL, "%s", "Unknown");
103}
104
105static ssize_t ux500_get_process(struct device *dev,
106					struct device_attribute *attr,
107					char *buf)
108{
109	if (dbx500_id.process == 0x00)
110		return sprintf(buf, "Standard\n");
111
112	return sprintf(buf, "%02xnm\n", dbx500_id.process);
113}
114
115static void __init soc_info_populate(struct soc_device_attribute *soc_dev_attr,
116				     const char *soc_id)
117{
118	soc_dev_attr->soc_id   = soc_id;
119	soc_dev_attr->machine  = ux500_get_machine();
120	soc_dev_attr->family   = ux500_get_family();
121	soc_dev_attr->revision = ux500_get_revision();
122}
123
124static const struct device_attribute ux500_soc_attr =
125	__ATTR(process,  S_IRUGO, ux500_get_process,  NULL);
126
127struct device * __init ux500_soc_device_init(const char *soc_id)
128{
129	struct device *parent;
130	struct soc_device *soc_dev;
131	struct soc_device_attribute *soc_dev_attr;
132
133	soc_dev_attr = kzalloc(sizeof(*soc_dev_attr), GFP_KERNEL);
134	if (!soc_dev_attr)
135		return ERR_PTR(-ENOMEM);
136
137	soc_info_populate(soc_dev_attr, soc_id);
138
139	soc_dev = soc_device_register(soc_dev_attr);
140	if (IS_ERR(soc_dev)) {
141	        kfree(soc_dev_attr);
142		return NULL;
143	}
144
145	parent = soc_device_to_device(soc_dev);
146	device_create_file(parent, &ux500_soc_attr);
147
148	return parent;
149}
150