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
ux500_restart(enum reboot_mode mode,const char * cmd)34 void 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 */
ux500_init_irq(void)54 void __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
ux500_get_machine(void)82 static const char * __init ux500_get_machine(void)
83 {
84 return kasprintf(GFP_KERNEL, "DB%4x", dbx500_partnumber());
85 }
86
ux500_get_family(void)87 static const char * __init ux500_get_family(void)
88 {
89 return kasprintf(GFP_KERNEL, "ux500");
90 }
91
ux500_get_revision(void)92 static 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
ux500_get_process(struct device * dev,struct device_attribute * attr,char * buf)105 static 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
soc_info_populate(struct soc_device_attribute * soc_dev_attr,const char * soc_id)115 static 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
124 static const struct device_attribute ux500_soc_attr =
125 __ATTR(process, S_IRUGO, ux500_get_process, NULL);
126
ux500_soc_device_init(const char * soc_id)127 struct 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