1// SPDX-License-Identifier: GPL-2.0-only
  2/*
  3 * Copyright (C) 2008-2009 ST-Ericsson SA
  4 *
  5 * Author: Srinidhi KASAGAR <srinidhi.kasagar@stericsson.com>
 
 
 
 
 
  6 */
  7#include <linux/types.h>
  8#include <linux/init.h>
  9#include <linux/device.h>
 10#include <linux/amba/bus.h>
 11#include <linux/interrupt.h>
 12#include <linux/irq.h>
 13#include <linux/irqchip.h>
 14#include <linux/irqchip/arm-gic.h>
 15#include <linux/mfd/dbx500-prcmu.h>
 16#include <linux/platform_data/arm-ux500-pm.h>
 17#include <linux/platform_device.h>
 18#include <linux/io.h>
 
 
 19#include <linux/of.h>
 20#include <linux/of_address.h>
 21#include <linux/of_platform.h>
 
 22#include <linux/regulator/machine.h>
 
 23
 24#include <asm/outercache.h>
 25#include <asm/hardware/cache-l2x0.h>
 26#include <asm/mach/map.h>
 27#include <asm/mach/arch.h>
 28
 29static int __init ux500_l2x0_unlock(void)
 30{
 31	int i;
 32	struct device_node *np;
 33	void __iomem *l2x0_base;
 34
 35	np = of_find_compatible_node(NULL, NULL, "arm,pl310-cache");
 36	l2x0_base = of_iomap(np, 0);
 37	of_node_put(np);
 38	if (!l2x0_base)
 39		return -ENODEV;
 40
 41	/*
 42	 * Unlock Data and Instruction Lock if locked. Ux500 U-Boot versions
 43	 * apparently locks both caches before jumping to the kernel. The
 44	 * l2x0 core will not touch the unlock registers if the l2x0 is
 45	 * already enabled, so we do it right here instead. The PL310 has
 46	 * 8 sets of registers, one per possible CPU.
 47	 */
 48	for (i = 0; i < 8; i++) {
 49		writel_relaxed(0x0, l2x0_base + L2X0_LOCKDOWN_WAY_D_BASE +
 50			       i * L2X0_LOCKDOWN_STRIDE);
 51		writel_relaxed(0x0, l2x0_base + L2X0_LOCKDOWN_WAY_I_BASE +
 52			       i * L2X0_LOCKDOWN_STRIDE);
 53	}
 54	iounmap(l2x0_base);
 55	return 0;
 
 
 
 
 56}
 57
 58static void ux500_l2c310_write_sec(unsigned long val, unsigned reg)
 
 
 
 
 59{
 
 
 
 
 
 
 60	/*
 61	 * We can't write to secure registers as we are in non-secure
 62	 * mode, until we have some SMI service available.
 
 63	 */
 
 64}
 65
 66/*
 67 * FIXME: Should we set up the GPIO domain here?
 68 *
 69 * The problem is that we cannot put the interrupt resources into the platform
 70 * device until the irqdomain has been added. Right now, we set the GIC interrupt
 71 * domain from init_irq(), then load the gpio driver from
 72 * core_initcall(nmk_gpio_init) and add the platform devices from
 73 * arch_initcall(customize_machine).
 74 *
 75 * This feels fragile because it depends on the gpio device getting probed
 76 * _before_ any device uses the gpio interrupts.
 77*/
 78static void __init ux500_init_irq(void)
 79{
 80	struct device_node *np;
 81	struct resource r;
 82
 83	irqchip_init();
 84	prcmu_early_init();
 85	np = of_find_compatible_node(NULL, NULL, "stericsson,db8500-prcmu");
 86	of_address_to_resource(np, 0, &r);
 87	of_node_put(np);
 88	if (!r.start) {
 89		pr_err("could not find PRCMU base resource\n");
 90		return;
 91	}
 92	ux500_pm_init(r.start, r.end-r.start);
 93
 94	/* Unlock before init */
 95	ux500_l2x0_unlock();
 96	outer_cache.write_sec = ux500_l2c310_write_sec;
 97}
 98
 99static void ux500_restart(enum reboot_mode mode, const char *cmd)
100{
101	local_irq_disable();
102	local_fiq_disable();
103
104	prcmu_system_reset(0);
105}
106
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
107static const struct of_device_id u8500_local_bus_nodes[] = {
108	/* only create devices below soc node */
109	{ .compatible = "stericsson,db8500", },
 
110	{ .compatible = "simple-bus"},
111	{ },
112};
113
114static void __init u8500_init_machine(void)
115{
116	of_platform_populate(NULL, u8500_local_bus_nodes,
117			     NULL, NULL);
 
 
 
 
 
 
 
118}
119
120static const char * stericsson_dt_platform_compat[] = {
121	"st-ericsson,u8500",
 
122	"st-ericsson,u9500",
 
123	NULL,
124};
125
126DT_MACHINE_START(U8500_DT, "ST-Ericsson Ux5x0 platform (Device Tree Support)")
127	.l2c_aux_val    = 0,
128	.l2c_aux_mask	= ~0,
129	.init_irq	= ux500_init_irq,
130	.init_machine	= u8500_init_machine,
 
131	.dt_compat      = stericsson_dt_platform_compat,
132	.restart        = ux500_restart,
133MACHINE_END

 
  1/*
  2 * Copyright (C) 2008-2009 ST-Ericsson SA
  3 *
  4 * Author: Srinidhi KASAGAR <srinidhi.kasagar@stericsson.com>
  5 *
  6 * This program is free software; you can redistribute it and/or modify
  7 * it under the terms of the GNU General Public License version 2, as
  8 * published by the Free Software Foundation.
  9 *
 10 */
 11#include <linux/types.h>
 12#include <linux/init.h>
 13#include <linux/device.h>
 14#include <linux/amba/bus.h>
 15#include <linux/interrupt.h>
 16#include <linux/irq.h>
 
 
 
 
 17#include <linux/platform_device.h>
 18#include <linux/io.h>
 19#include <linux/mfd/abx500/ab8500.h>
 20#include <linux/mfd/dbx500-prcmu.h>
 21#include <linux/of.h>
 
 22#include <linux/of_platform.h>
 23#include <linux/perf/arm_pmu.h>
 24#include <linux/regulator/machine.h>
 25#include <linux/random.h>
 26
 
 
 27#include <asm/mach/map.h>
 
 28
 29#include "setup.h"
 
 
 
 
 
 
 
 
 
 
 30
 31#include "board-mop500-regulators.h"
 32#include "board-mop500.h"
 33#include "db8500-regs.h"
 34#include "id.h"
 35
 36static struct ab8500_platform_data ab8500_platdata = {
 37	.regulator	= &ab8500_regulator_plat_data,
 38};
 39
 40static struct prcmu_pdata db8500_prcmu_pdata = {
 41	.ab_platdata	= &ab8500_platdata,
 42	.version_offset	= DB8500_PRCMU_FW_VERSION_OFFSET,
 43	.legacy_offset	= DB8500_PRCMU_LEGACY_OFFSET,
 44};
 45
 46static void __init u8500_map_io(void)
 47{
 48	debug_ll_io_init();
 49	ux500_setup_id();
 50}
 51
 52/*
 53 * The PMU IRQ lines of two cores are wired together into a single interrupt.
 54 * Bounce the interrupt to the other core if it's not ours.
 55 */
 56static irqreturn_t db8500_pmu_handler(int irq, void *dev, irq_handler_t handler)
 57{
 58	irqreturn_t ret = handler(irq, dev);
 59	int other = !smp_processor_id();
 60
 61	if (ret == IRQ_NONE && cpu_online(other))
 62		irq_set_affinity(irq, cpumask_of(other));
 63
 64	/*
 65	 * We should be able to get away with the amount of IRQ_NONEs we give,
 66	 * while still having the spurious IRQ detection code kick in if the
 67	 * interrupt really starts hitting spuriously.
 68	 */
 69	return ret;
 70}
 71
 72static struct arm_pmu_platdata db8500_pmu_platdata = {
 73	.handle_irq		= db8500_pmu_handler,
 74};
 75
 76static const char *db8500_read_soc_id(void)
 
 
 
 
 
 
 
 
 77{
 78	void __iomem *uid;
 79	const char *retstr;
 80
 81	uid = ioremap(U8500_BB_UID_BASE, 0x20);
 82	if (!uid)
 83		return NULL;
 84	/* Throw these device-specific numbers into the entropy pool */
 85	add_device_randomness(uid, 0x14);
 86	retstr = kasprintf(GFP_KERNEL, "%08x%08x%08x%08x%08x",
 87			 readl((u32 *)uid+0),
 88			 readl((u32 *)uid+1), readl((u32 *)uid+2),
 89			 readl((u32 *)uid+3), readl((u32 *)uid+4));
 90	iounmap(uid);
 91	return retstr;
 
 
 
 92}
 93
 94static struct device * __init db8500_soc_device_init(void)
 95{
 96	const char *soc_id = db8500_read_soc_id();
 
 97
 98	return ux500_soc_device_init(soc_id);
 99}
100
101static struct of_dev_auxdata u8500_auxdata_lookup[] __initdata = {
102	/* Requires call-back bindings. */
103	OF_DEV_AUXDATA("arm,cortex-a9-pmu", 0, "arm-pmu", &db8500_pmu_platdata),
104	/* Requires DMA bindings. */
105	OF_DEV_AUXDATA("stericsson,ux500-msp-i2s", 0x80123000,
106		       "ux500-msp-i2s.0", &msp0_platform_data),
107	OF_DEV_AUXDATA("stericsson,ux500-msp-i2s", 0x80124000,
108		       "ux500-msp-i2s.1", &msp1_platform_data),
109	OF_DEV_AUXDATA("stericsson,ux500-msp-i2s", 0x80117000,
110		       "ux500-msp-i2s.2", &msp2_platform_data),
111	OF_DEV_AUXDATA("stericsson,ux500-msp-i2s", 0x80125000,
112		       "ux500-msp-i2s.3", &msp3_platform_data),
113	/* Requires non-DT:able platform data. */
114	OF_DEV_AUXDATA("stericsson,db8500-prcmu", 0x80157000, "db8500-prcmu",
115			&db8500_prcmu_pdata),
116	OF_DEV_AUXDATA("stericsson,ux500-cryp", 0xa03cb000, "cryp1", NULL),
117	OF_DEV_AUXDATA("stericsson,ux500-hash", 0xa03c2000, "hash1", NULL),
118	OF_DEV_AUXDATA("stericsson,snd-soc-mop500", 0, "snd-soc-mop500.0",
119			NULL),
120	{},
121};
122
123static struct of_dev_auxdata u8540_auxdata_lookup[] __initdata = {
124	OF_DEV_AUXDATA("stericsson,db8500-prcmu", 0x80157000, "db8500-prcmu",
125			&db8500_prcmu_pdata),
126	{},
127};
128
129static const struct of_device_id u8500_local_bus_nodes[] = {
130	/* only create devices below soc node */
131	{ .compatible = "stericsson,db8500", },
132	{ .compatible = "stericsson,db8500-prcmu", },
133	{ .compatible = "simple-bus"},
134	{ },
135};
136
137static void __init u8500_init_machine(void)
138{
139	struct device *parent = db8500_soc_device_init();
140
141	/* automatically probe child nodes of dbx5x0 devices */
142	if (of_machine_is_compatible("st-ericsson,u8540"))
143		of_platform_populate(NULL, u8500_local_bus_nodes,
144				     u8540_auxdata_lookup, parent);
145	else
146		of_platform_populate(NULL, u8500_local_bus_nodes,
147				     u8500_auxdata_lookup, parent);
148}
149
150static const char * stericsson_dt_platform_compat[] = {
151	"st-ericsson,u8500",
152	"st-ericsson,u8540",
153	"st-ericsson,u9500",
154	"st-ericsson,u9540",
155	NULL,
156};
157
158DT_MACHINE_START(U8500_DT, "ST-Ericsson Ux5x0 platform (Device Tree Support)")
159	.map_io		= u8500_map_io,
 
160	.init_irq	= ux500_init_irq,
161	.init_machine	= u8500_init_machine,
162	.init_late	= NULL,
163	.dt_compat      = stericsson_dt_platform_compat,
164	.restart        = ux500_restart,
165MACHINE_END