[linux-2.6-block.git] / arch / arm / mach-keystone / keystone.c

// SPDX-License-Identifier: GPL-2.0-only
/*
 * Keystone2 based boards and SOC related code.
 *
 * Copyright 2013 Texas Instruments, Inc.
 *	Cyril Chemparathy <cyril@ti.com>
 *	Santosh Shilimkar <santosh.shillimkar@ti.com>
 */
#include <linux/io.h>
#include <linux/of.h>
#include <linux/dma-map-ops.h>
#include <linux/init.h>
#include <linux/of_platform.h>
#include <linux/of_address.h>
#include <linux/memblock.h>

#include <asm/setup.h>
#include <asm/mach/map.h>
#include <asm/mach/arch.h>
#include <asm/mach/time.h>
#include <asm/memory.h>

#include "memory.h"

#include "keystone.h"

#ifdef CONFIG_ARM_LPAE
static int keystone_platform_notifier(struct notifier_block *nb,
				      unsigned long event, void *data)
{
	struct device *dev = data;

	if (event != BUS_NOTIFY_ADD_DEVICE)
		return NOTIFY_DONE;

	if (!dev)
		return NOTIFY_BAD;

	if (!dev->of_node) {
		int ret = dma_direct_set_offset(dev, KEYSTONE_HIGH_PHYS_START,
						KEYSTONE_LOW_PHYS_START,
						KEYSTONE_HIGH_PHYS_SIZE);
		dev_err(dev, "set dma_offset%08llx%s\n",
			KEYSTONE_HIGH_PHYS_START - KEYSTONE_LOW_PHYS_START,
			ret ? " failed" : "");
	}
	return NOTIFY_OK;
}

static struct notifier_block platform_nb = {
	.notifier_call = keystone_platform_notifier,
};
#endif /* CONFIG_ARM_LPAE */

static void __init keystone_init(void)
{
#ifdef CONFIG_ARM_LPAE
	if (PHYS_OFFSET >= KEYSTONE_HIGH_PHYS_START)
		bus_register_notifier(&platform_bus_type, &platform_nb);
#endif
	keystone_pm_runtime_init();
}

static long long __init keystone_pv_fixup(void)
{
	long long offset;
	u64 mem_start, mem_end;

	mem_start = memblock_start_of_DRAM();
	mem_end = memblock_end_of_DRAM();

	/* nothing to do if we are running out of the <32-bit space */
	if (mem_start >= KEYSTONE_LOW_PHYS_START &&
	    mem_end   <= KEYSTONE_LOW_PHYS_END)
		return 0;

	if (mem_start < KEYSTONE_HIGH_PHYS_START ||
	    mem_end   > KEYSTONE_HIGH_PHYS_END) {
		pr_crit("Invalid address space for memory (%08llx-%08llx)\n",
		        mem_start, mem_end);
		return 0;
	}

	offset = KEYSTONE_HIGH_PHYS_START - KEYSTONE_LOW_PHYS_START;

	/* Populate the arch idmap hook */
	arch_phys_to_idmap_offset = -offset;

	return offset;
}

static const char *const keystone_match[] __initconst = {
	"ti,k2hk",
	"ti,k2e",
	"ti,k2l",
	"ti,k2g",
	"ti,keystone",
	NULL,
};

DT_MACHINE_START(KEYSTONE, "Keystone")
#if defined(CONFIG_ZONE_DMA) && defined(CONFIG_ARM_LPAE)
	.dma_zone_size	= SZ_2G,
#endif
	.init_machine	= keystone_init,
	.dt_compat	= keystone_match,
	.pv_fixup	= keystone_pv_fixup,
MACHINE_END
Commit	Line	Data
75a6faf6	1	// SPDX-License-Identifier: GPL-2.0-only
828989ad SS	2	/*
	3	* Keystone2 based boards and SOC related code.
	4	*
	5	* Copyright 2013 Texas Instruments, Inc.
	6	* Cyril Chemparathy <cyril@ti.com>
	7	* Santosh Shilimkar <santosh.shillimkar@ti.com>
828989ad SS	8	*/
	9	#include <linux/io.h>
	10	#include <linux/of.h>
16fee29b	11	#include <linux/dma-map-ops.h>
828989ad SS	12	#include <linux/init.h>
	13	#include <linux/of_platform.h>
	14	#include <linux/of_address.h>
bbea06f3	15	#include <linux/memblock.h>
828989ad SS	16
	17	#include <asm/setup.h>
	18	#include <asm/mach/map.h>
	19	#include <asm/mach/arch.h>
	20	#include <asm/mach/time.h>
5eb3da72 SS	21	#include <asm/memory.h>
	22
	23	#include "memory.h"
f07cb6a0 SS	24
f07cb6a0 SS	25	#include "keystone.h"
828989ad	26
cf141ae9	27	#ifdef CONFIG_ARM_LPAE
14f37914 SS	28	static int keystone_platform_notifier(struct notifier_block *nb,
	29	unsigned long event, void *data)
	30	{
	31	struct device *dev = data;
	32
	33	if (event != BUS_NOTIFY_ADD_DEVICE)
	34	return NOTIFY_DONE;
	35
	36	if (!dev)
	37	return NOTIFY_BAD;
	38
	39	if (!dev->of_node) {
e0d07278 JQ	40	int ret = dma_direct_set_offset(dev, KEYSTONE_HIGH_PHYS_START,
	41	KEYSTONE_LOW_PHYS_START,
	42	KEYSTONE_HIGH_PHYS_SIZE);
	43	dev_err(dev, "set dma_offset%08llx%s\n",
	44	KEYSTONE_HIGH_PHYS_START - KEYSTONE_LOW_PHYS_START,
	45	ret ? " failed" : "");
14f37914 SS	46	}
	47	return NOTIFY_OK;
	48	}
828989ad	49
30b5f4d6 RK	50	static struct notifier_block platform_nb = {
	51	.notifier_call = keystone_platform_notifier,
	52	};
cf141ae9	53	#endif /* CONFIG_ARM_LPAE */
30b5f4d6	54
828989ad SS	55	static void __init keystone_init(void)
828989ad SS	56	{
cf141ae9	57	#ifdef CONFIG_ARM_LPAE
e0d07278	58	if (PHYS_OFFSET >= KEYSTONE_HIGH_PHYS_START)
14f37914	59	bus_register_notifier(&platform_bus_type, &platform_nb);
cf141ae9	60	#endif
30b5f4d6	61	keystone_pm_runtime_init();
828989ad SS	62	}
828989ad SS	63
c0b759d8	64	static long long __init keystone_pv_fixup(void)
5eb3da72	65	{
c8ca2b4b	66	long long offset;
844b85dd	67	u64 mem_start, mem_end;
5eb3da72	68
bbea06f3 SS	69	mem_start = memblock_start_of_DRAM();
bbea06f3 SS	70	mem_end = memblock_end_of_DRAM();
5eb3da72 SS	71
	72	/* nothing to do if we are running out of the <32-bit space */
	73	if (mem_start >= KEYSTONE_LOW_PHYS_START &&
	74	mem_end <= KEYSTONE_LOW_PHYS_END)
c8ca2b4b	75	return 0;
5eb3da72 SS	76
	77	if (mem_start < KEYSTONE_HIGH_PHYS_START \|\|
	78	mem_end > KEYSTONE_HIGH_PHYS_END) {
	79	pr_crit("Invalid address space for memory (%08llx-%08llx)\n",
844b85dd	80	mem_start, mem_end);
c8ca2b4b	81	return 0;
5eb3da72 SS	82	}
5eb3da72 SS	83
c8ca2b4b	84	offset = KEYSTONE_HIGH_PHYS_START - KEYSTONE_LOW_PHYS_START;
5eb3da72 SS	85
5eb3da72 SS	86	/* Populate the arch idmap hook */
981b6714	87	arch_phys_to_idmap_offset = -offset;
5eb3da72	88
c8ca2b4b	89	return offset;
5eb3da72 SS	90	}
5eb3da72 SS	91
543c5040	92	static const char *const keystone_match[] __initconst = {
01cf228b NM	93	"ti,k2hk",
	94	"ti,k2e",
	95	"ti,k2l",
3b2d3dc9	96	"ti,k2g",
3babe306	97	"ti,keystone",
828989ad SS	98	NULL,
	99	};
	100
828989ad	101	DT_MACHINE_START(KEYSTONE, "Keystone")
df595a9d SS	102	#if defined(CONFIG_ZONE_DMA) && defined(CONFIG_ARM_LPAE)
	103	.dma_zone_size = SZ_2G,
	104	#endif
828989ad SS	105	.init_machine = keystone_init,
828989ad SS	106	.dt_compat = keystone_match,
c0b759d8	107	.pv_fixup = keystone_pv_fixup,
828989ad	108	MACHINE_END