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/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	gic_set_irqchip_flags(IRQCHIP_SKIP_SET_WAKE | IRQCHIP_MASK_ON_SUSPEND);
56	irqchip_init();
57
58	/*
59	 * Init clocks here so that they are available for system timer
60	 * initialization.
61	 */
62	if (cpu_is_u8500_family()) {
63		prcmu_early_init(U8500_PRCMU_BASE, SZ_8K - 1);
64		ux500_pm_init(U8500_PRCMU_BASE, SZ_8K - 1);
65
66		u8500_of_clk_init(U8500_CLKRST1_BASE,
67				  U8500_CLKRST2_BASE,
68				  U8500_CLKRST3_BASE,
69				  U8500_CLKRST5_BASE,
70				  U8500_CLKRST6_BASE);
71	} else if (cpu_is_u9540()) {
72		prcmu_early_init(U8500_PRCMU_BASE, SZ_8K - 1);
73		ux500_pm_init(U8500_PRCMU_BASE, SZ_8K - 1);
74		u9540_clk_init(U8500_CLKRST1_BASE, U8500_CLKRST2_BASE,
75			       U8500_CLKRST3_BASE, U8500_CLKRST5_BASE,
76			       U8500_CLKRST6_BASE);
77	} else if (cpu_is_u8540()) {
78		prcmu_early_init(U8500_PRCMU_BASE, SZ_8K + SZ_4K - 1);
79		ux500_pm_init(U8500_PRCMU_BASE, SZ_8K + SZ_4K - 1);
80		u8540_clk_init(U8500_CLKRST1_BASE, U8500_CLKRST2_BASE,
81			       U8500_CLKRST3_BASE, U8500_CLKRST5_BASE,
82			       U8500_CLKRST6_BASE);
83	}
84}
85
86static const char * __init ux500_get_machine(void)
87{
88	return kasprintf(GFP_KERNEL, "DB%4x", dbx500_partnumber());
89}
90
91static const char * __init ux500_get_family(void)
92{
93	return kasprintf(GFP_KERNEL, "ux500");
94}
95
96static const char * __init ux500_get_revision(void)
97{
98	unsigned int rev = dbx500_revision();
99
100	if (rev == 0x01)
101		return kasprintf(GFP_KERNEL, "%s", "ED");
102	else if (rev >= 0xA0)
103		return kasprintf(GFP_KERNEL, "%d.%d",
104				 (rev >> 4) - 0xA + 1, rev & 0xf);
105
106	return kasprintf(GFP_KERNEL, "%s", "Unknown");
107}
108
109static ssize_t ux500_get_process(struct device *dev,
110					struct device_attribute *attr,
111					char *buf)
112{
113	if (dbx500_id.process == 0x00)
114		return sprintf(buf, "Standard\n");
115
116	return sprintf(buf, "%02xnm\n", dbx500_id.process);
117}
118
119static void __init soc_info_populate(struct soc_device_attribute *soc_dev_attr,
120				     const char *soc_id)
121{
122	soc_dev_attr->soc_id   = soc_id;
123	soc_dev_attr->machine  = ux500_get_machine();
124	soc_dev_attr->family   = ux500_get_family();
125	soc_dev_attr->revision = ux500_get_revision();
126}
127
128static const struct device_attribute ux500_soc_attr =
129	__ATTR(process,  S_IRUGO, ux500_get_process,  NULL);
130
131struct device * __init ux500_soc_device_init(const char *soc_id)
132{
133	struct device *parent;
134	struct soc_device *soc_dev;
135	struct soc_device_attribute *soc_dev_attr;
136
137	soc_dev_attr = kzalloc(sizeof(*soc_dev_attr), GFP_KERNEL);
138	if (!soc_dev_attr)
139		return ERR_PTR(-ENOMEM);
140
141	soc_info_populate(soc_dev_attr, soc_id);
142
143	soc_dev = soc_device_register(soc_dev_attr);
144	if (IS_ERR(soc_dev)) {
145	        kfree(soc_dev_attr);
146		return NULL;
147	}
148
149	parent = soc_device_to_device(soc_dev);
150	device_create_file(parent, &ux500_soc_attr);
151
152	return parent;
153}
154