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
 33void 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*/
 53void __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
 86static 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(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}