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/clksrc-dbx500-prcmu.h>
 14#include <linux/sys_soc.h>
 15#include <linux/err.h>
 16#include <linux/slab.h>
 17#include <linux/stat.h>
 18#include <linux/of.h>
 19#include <linux/of_irq.h>
 20
 21#include <asm/hardware/gic.h>
 22#include <asm/mach/map.h>
 23
 24#include <mach/hardware.h>
 25#include <mach/setup.h>
 26#include <mach/devices.h>
 27
 28#include "clock.h"
 29
 30void __iomem *_PRCMU_BASE;
 31
 32/*
 33 * FIXME: Should we set up the GPIO domain here?
 34 *
 35 * The problem is that we cannot put the interrupt resources into the platform
 36 * device until the irqdomain has been added. Right now, we set the GIC interrupt
 37 * domain from init_irq(), then load the gpio driver from
 38 * core_initcall(nmk_gpio_init) and add the platform devices from
 39 * arch_initcall(customize_machine).
 40 *
 41 * This feels fragile because it depends on the gpio device getting probed
 42 * _before_ any device uses the gpio interrupts.
 43*/
 44static const struct of_device_id ux500_dt_irq_match[] = {
 45	{ .compatible = "arm,cortex-a9-gic", .data = gic_of_init, },
 46	{},
 47};
 48
 49void __init ux500_init_irq(void)
 50{
 51	void __iomem *dist_base;
 52	void __iomem *cpu_base;
 53
 54	if (cpu_is_u8500_family()) {
 55		dist_base = __io_address(U8500_GIC_DIST_BASE);
 56		cpu_base = __io_address(U8500_GIC_CPU_BASE);
 57	} else
 58		ux500_unknown_soc();
 59
 60#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);
 66
 67	/*
 68	 * Init clocks here so that they are available for system timer
 69	 * initialization.
 70	 */
 71	if (cpu_is_u8500_family())
 72		db8500_prcmu_early_init();
 73	clk_init();
 74}
 75
 76void __init ux500_init_late(void)
 77{
 78	clk_debugfs_init();
 79	clk_init_smp_twd_cpufreq();
 80}
 81
 82static const char * __init ux500_get_machine(void)
 83{
 84	return kasprintf(GFP_KERNEL, "DB%4x", dbx500_partnumber());
 85}
 86
 87static const char * __init ux500_get_family(void)
 88{
 89	return kasprintf(GFP_KERNEL, "ux500");
 90}
 91
 92static 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
105static 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
115static 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
124struct device_attribute ux500_soc_attr =
125	__ATTR(process,  S_IRUGO, ux500_get_process,  NULL);
126
127struct 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_OR_NULL(soc_dev)) {
141	        kfree(soc_dev_attr);
142		return NULL;
143	}
144
145	parent = soc_device_to_device(soc_dev);
146	if (!IS_ERR_OR_NULL(parent))
147		device_create_file(parent, &ux500_soc_attr);
148
149	return parent;
150}