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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/clk.h>
12 #include <linux/mfd/db8500-prcmu.h>
13 #include <linux/mfd/db5500-prcmu.h>
14 #include <linux/clksrc-dbx500-prcmu.h>
15 #include <linux/sys_soc.h>
16 #include <linux/err.h>
17 #include <linux/slab.h>
18 #include <linux/stat.h>
19 #include <linux/of.h>
20 #include <linux/of_irq.h>
21 
22 #include <asm/hardware/gic.h>
23 #include <asm/mach/map.h>
24 
25 #include <mach/hardware.h>
26 #include <mach/setup.h>
27 #include <mach/devices.h>
28 
29 #include "clock.h"
30 
31 void __iomem *_PRCMU_BASE;
32 
33 static const struct of_device_id ux500_dt_irq_match[] = {
34 	{ .compatible = "arm,cortex-a9-gic", .data = gic_of_init, },
35 	{},
36 };
37 
ux500_init_irq(void)38 void __init ux500_init_irq(void)
39 {
40 	void __iomem *dist_base;
41 	void __iomem *cpu_base;
42 
43 	if (cpu_is_u5500()) {
44 		dist_base = __io_address(U5500_GIC_DIST_BASE);
45 		cpu_base = __io_address(U5500_GIC_CPU_BASE);
46 	} else if (cpu_is_u8500()) {
47 		dist_base = __io_address(U8500_GIC_DIST_BASE);
48 		cpu_base = __io_address(U8500_GIC_CPU_BASE);
49 	} else
50 		ux500_unknown_soc();
51 
52 #ifdef CONFIG_OF
53 	if (of_have_populated_dt())
54 		of_irq_init(ux500_dt_irq_match);
55 	else
56 #endif
57 		gic_init(0, 29, dist_base, cpu_base);
58 
59 	/*
60 	 * Init clocks here so that they are available for system timer
61 	 * initialization.
62 	 */
63 	if (cpu_is_u5500())
64 		db5500_prcmu_early_init();
65 	if (cpu_is_u8500())
66 		db8500_prcmu_early_init();
67 	clk_init();
68 }
69 
ux500_get_machine(void)70 static const char * __init ux500_get_machine(void)
71 {
72 	return kasprintf(GFP_KERNEL, "DB%4x", dbx500_partnumber());
73 }
74 
ux500_get_family(void)75 static const char * __init ux500_get_family(void)
76 {
77 	return kasprintf(GFP_KERNEL, "ux500");
78 }
79 
ux500_get_revision(void)80 static const char * __init ux500_get_revision(void)
81 {
82 	unsigned int rev = dbx500_revision();
83 
84 	if (rev == 0x01)
85 		return kasprintf(GFP_KERNEL, "%s", "ED");
86 	else if (rev >= 0xA0)
87 		return kasprintf(GFP_KERNEL, "%d.%d",
88 				 (rev >> 4) - 0xA + 1, rev & 0xf);
89 
90 	return kasprintf(GFP_KERNEL, "%s", "Unknown");
91 }
92 
ux500_get_process(struct device * dev,struct device_attribute * attr,char * buf)93 static ssize_t ux500_get_process(struct device *dev,
94 					struct device_attribute *attr,
95 					char *buf)
96 {
97 	if (dbx500_id.process == 0x00)
98 		return sprintf(buf, "Standard\n");
99 
100 	return sprintf(buf, "%02xnm\n", dbx500_id.process);
101 }
102 
soc_info_populate(struct soc_device_attribute * soc_dev_attr,const char * soc_id)103 static void __init soc_info_populate(struct soc_device_attribute *soc_dev_attr,
104 				     const char *soc_id)
105 {
106 	soc_dev_attr->soc_id   = soc_id;
107 	soc_dev_attr->machine  = ux500_get_machine();
108 	soc_dev_attr->family   = ux500_get_family();
109 	soc_dev_attr->revision = ux500_get_revision();
110 }
111 
112 struct device_attribute ux500_soc_attr =
113 	__ATTR(process,  S_IRUGO, ux500_get_process,  NULL);
114 
ux500_soc_device_init(const char * soc_id)115 struct device * __init ux500_soc_device_init(const char *soc_id)
116 {
117 	struct device *parent;
118 	struct soc_device *soc_dev;
119 	struct soc_device_attribute *soc_dev_attr;
120 
121 	soc_dev_attr = kzalloc(sizeof(*soc_dev_attr), GFP_KERNEL);
122 	if (!soc_dev_attr)
123 		return ERR_PTR(-ENOMEM);
124 
125 	soc_info_populate(soc_dev_attr, soc_id);
126 
127 	soc_dev = soc_device_register(soc_dev_attr);
128 	if (IS_ERR_OR_NULL(soc_dev)) {
129 	        kfree(soc_dev_attr);
130 		return NULL;
131 	}
132 
133 	parent = soc_device_to_device(soc_dev);
134 	if (!IS_ERR_OR_NULL(parent))
135 		device_create_file(parent, &ux500_soc_attr);
136 
137 	return parent;
138 }
139