blob: 2236cbd03cd79c11d897353d33401ddc4a3c962e [file] [log] [blame]
Rabin Vincent178980f2010-05-03 07:39:02 +01001/*
2 * Copyright (C) ST-Ericsson SA 2010
3 *
4 * Author: Rabin Vincent <rabin.vincent@stericsson.com> for ST-Ericsson
Lee Joneseda413c2012-02-06 11:22:24 -08005 * Author: Lee Jones <lee.jones@linaro.org> for ST-Ericsson
Rabin Vincent178980f2010-05-03 07:39:02 +01006 * License terms: GNU General Public License (GPL) version 2
7 */
8
9#include <linux/platform_device.h>
Rabin Vincent178980f2010-05-03 07:39:02 +010010#include <linux/io.h>
Linus Walleij650c2a22011-05-15 22:53:56 +020011#include <linux/mfd/db8500-prcmu.h>
Mattias Wallin7ed00af2011-05-27 10:30:34 +020012#include <linux/clksrc-dbx500-prcmu.h>
Lee Joneseda413c2012-02-06 11:22:24 -080013#include <linux/sys_soc.h>
14#include <linux/err.h>
15#include <linux/slab.h>
16#include <linux/stat.h>
Lee Jonesdab64872012-03-07 17:22:30 +000017#include <linux/of.h>
18#include <linux/of_irq.h>
Ulf Hanssonebc96db2012-08-27 15:45:53 +020019#include <linux/platform_data/clk-ux500.h>
Rabin Vincent178980f2010-05-03 07:39:02 +010020
Rabin Vincent178980f2010-05-03 07:39:02 +010021#include <asm/hardware/gic.h>
22#include <asm/mach/map.h>
23
24#include <mach/hardware.h>
25#include <mach/setup.h>
Rabin Vincentd48fd002010-05-03 07:46:56 +010026#include <mach/devices.h>
Rabin Vincent178980f2010-05-03 07:39:02 +010027
Linus Walleij11871892011-03-29 16:53:29 +020028void __iomem *_PRCMU_BASE;
29
Lee Jonesa60b57e2012-04-19 21:36:31 +010030/*
31 * FIXME: Should we set up the GPIO domain here?
32 *
33 * The problem is that we cannot put the interrupt resources into the platform
34 * device until the irqdomain has been added. Right now, we set the GIC interrupt
35 * domain from init_irq(), then load the gpio driver from
36 * core_initcall(nmk_gpio_init) and add the platform devices from
37 * arch_initcall(customize_machine).
38 *
39 * This feels fragile because it depends on the gpio device getting probed
40 * _before_ any device uses the gpio interrupts.
41*/
Lee Jonesdab64872012-03-07 17:22:30 +000042static const struct of_device_id ux500_dt_irq_match[] = {
43 { .compatible = "arm,cortex-a9-gic", .data = gic_of_init, },
44 {},
45};
46
Rabin Vincent178980f2010-05-03 07:39:02 +010047void __init ux500_init_irq(void)
48{
Rabin Vincent92389ca2010-12-08 11:07:57 +053049 void __iomem *dist_base;
50 void __iomem *cpu_base;
51
Linus Walleij7e1f97e2012-08-22 10:55:03 +020052 gic_arch_extn.flags = IRQCHIP_SKIP_SET_WAKE | IRQCHIP_MASK_ON_SUSPEND;
53
Linus Walleije1bbb552012-08-09 17:10:36 +020054 if (cpu_is_u8500_family() || cpu_is_ux540_family()) {
Rabin Vincent92389ca2010-12-08 11:07:57 +053055 dist_base = __io_address(U8500_GIC_DIST_BASE);
56 cpu_base = __io_address(U8500_GIC_CPU_BASE);
57 } else
58 ux500_unknown_soc();
59
Lee Jonesdab64872012-03-07 17:22:30 +000060#ifdef CONFIG_OF
61 if (of_have_populated_dt())
62 of_irq_init(ux500_dt_irq_match);
63 else
64#endif
65 gic_init(0, 29, dist_base, cpu_base);
Linus Walleijba327b12010-05-26 07:38:54 +010066
67 /*
68 * Init clocks here so that they are available for system timer
69 * initialization.
70 */
Linus Walleijbc71c092012-01-23 11:54:44 +010071 if (cpu_is_u8500_family())
Mattias Nilsson73180f82011-08-12 10:28:10 +020072 db8500_prcmu_early_init();
Ulf Hanssonebc96db2012-08-27 15:45:53 +020073
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();
Rabin Vincent178980f2010-05-03 07:39:02 +010080}
Lee Joneseda413c2012-02-06 11:22:24 -080081
Shawn Guoa010bc22012-05-02 17:10:07 +080082void __init ux500_init_late(void)
83{
Shawn Guoa010bc22012-05-02 17:10:07 +080084}
85
Lee Joneseda413c2012-02-06 11:22:24 -080086static 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
128struct 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_OR_NULL(soc_dev)) {
145 kfree(soc_dev_attr);
146 return NULL;
147 }
148
149 parent = soc_device_to_device(soc_dev);
150 if (!IS_ERR_OR_NULL(parent))
151 device_create_file(parent, &ux500_soc_attr);
152
153 return parent;
154}