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
ux500_restart(enum reboot_mode mode,const char * cmd)33 void 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 */
ux500_init_irq(void)53 void __init ux500_init_irq(void)
54 {
55 gic_arch_extn.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
ux500_get_machine(void)86 static const char * __init ux500_get_machine(void)
87 {
88 return kasprintf(GFP_KERNEL, "DB%4x", dbx500_partnumber());
89 }
90
ux500_get_family(void)91 static const char * __init ux500_get_family(void)
92 {
93 return kasprintf(GFP_KERNEL, "ux500");
94 }
95
ux500_get_revision(void)96 static 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
ux500_get_process(struct device * dev,struct device_attribute * attr,char * buf)109 static 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
soc_info_populate(struct soc_device_attribute * soc_dev_attr,const char * soc_id)119 static 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
128 static const struct device_attribute ux500_soc_attr =
129 __ATTR(process, S_IRUGO, ux500_get_process, NULL);
130
ux500_soc_device_init(const char * soc_id)131 struct 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