[people/ms/u-boot.git] / arch / arm / mach-rmobile / cpu_info-rcar.c

/*
 * arch/arm/cpu/armv7/rmobile/cpu_info-rcar.c
 *
 * Copyright (C) 2013,2014 Renesas Electronics Corporation
 *
 * SPDX-License-Identifier: GPL-2.0
 */
#include <common.h>
#include <asm/io.h>

#define PRR_MASK		0x7fff
#define R8A7796_REV_1_0		0x5200
#define R8A7796_REV_1_1		0x5210

static u32 rmobile_get_prr(void);

u32 rmobile_get_cpu_type(void)
{
	return (rmobile_get_prr() & 0x00007F00) >> 8;
}

u32 rmobile_get_cpu_rev_integer(void)
{
	const u32 prr = rmobile_get_prr();

	if ((prr & PRR_MASK) == R8A7796_REV_1_1)
		return 1;
	else
		return ((prr & 0x000000F0) >> 4) + 1;
}

u32 rmobile_get_cpu_rev_fraction(void)
{
	const u32 prr = rmobile_get_prr();

	if ((prr & PRR_MASK) == R8A7796_REV_1_1)
		return 1;
	else
		return prr & 0x0000000F;
}

#if !CONFIG_IS_ENABLED(DM) || !CONFIG_IS_ENABLED(SYSCON)
static u32 rmobile_get_prr(void)
{
	/*
	 * On RCar/RMobile Gen2 and older systems, the PRR is always
	 * located at the address below. On newer systems, the PRR
	 * may be located at different address, but that information
	 * is obtained from DT. This code will be removed when all
	 * of the older systems get converted to DM and OF control.
	 */
	return readl(0xFF000044);
}
#else

#include <dm.h>
#include <syscon.h>
#include <regmap.h>

struct renesas_prr_priv {
	fdt_addr_t	regs;
};

enum {
	PRR_RCAR,
};

static u32 rmobile_get_prr(void)
{
	struct regmap *map;

	map = syscon_get_regmap_by_driver_data(PRR_RCAR);
	if (!map) {
		printf("PRR regmap failed!\n");
		hang();
	}

	return readl(map->base);
}

static const struct udevice_id renesas_prr_ids[] = {
	{ .compatible = "renesas,prr", .data = PRR_RCAR },
	{ }
};

U_BOOT_DRIVER(renesas_prr) = {
	.name	= "renesas_prr",
	.id	= UCLASS_SYSCON,
	.of_match = renesas_prr_ids,
	.flags	= DM_FLAG_PRE_RELOC,
};
#endif
Commit	Line	Data
1d0e9278	1	/*
9b7fa2fe	2	* arch/arm/cpu/armv7/rmobile/cpu_info-rcar.c
1d0e9278	3	*
9b7fa2fe	4	* Copyright (C) 2013,2014 Renesas Electronics Corporation
1d0e9278 NI	5	*
	6	* SPDX-License-Identifier: GPL-2.0
	7	*/
	8	#include <common.h>
	9	#include <asm/io.h>
	10
e965c890 MV	11	#define PRR_MASK 0x7fff
	12	#define R8A7796_REV_1_0 0x5200
	13	#define R8A7796_REV_1_1 0x5210
1d0e9278	14
aff151e5 MV	15	static u32 rmobile_get_prr(void);
aff151e5 MV	16
1d0e9278 NI	17	u32 rmobile_get_cpu_type(void)
1d0e9278 NI	18	{
aff151e5	19	return (rmobile_get_prr() & 0x00007F00) >> 8;
1d0e9278 NI	20	}
	21
	22	u32 rmobile_get_cpu_rev_integer(void)
	23	{
aff151e5	24	const u32 prr = rmobile_get_prr();
e965c890 MV	25
	26	if ((prr & PRR_MASK) == R8A7796_REV_1_1)
	27	return 1;
	28	else
	29	return ((prr & 0x000000F0) >> 4) + 1;
1d0e9278	30	}
a028abea NI	31
	32	u32 rmobile_get_cpu_rev_fraction(void)
	33	{
aff151e5	34	const u32 prr = rmobile_get_prr();
e965c890 MV	35
	36	if ((prr & PRR_MASK) == R8A7796_REV_1_1)
	37	return 1;
	38	else
	39	return prr & 0x0000000F;
a028abea	40	}
aff151e5 MV	41
	42	#if !CONFIG_IS_ENABLED(DM) \|\| !CONFIG_IS_ENABLED(SYSCON)
	43	static u32 rmobile_get_prr(void)
	44	{
	45	/*
	46	* On RCar/RMobile Gen2 and older systems, the PRR is always
	47	* located at the address below. On newer systems, the PRR
	48	* may be located at different address, but that information
	49	* is obtained from DT. This code will be removed when all
	50	* of the older systems get converted to DM and OF control.
	51	*/
	52	return readl(0xFF000044);
	53	}
	54	#else
	55
	56	#include <dm.h>
	57	#include <syscon.h>
	58	#include <regmap.h>
	59
	60	struct renesas_prr_priv {
	61	fdt_addr_t regs;
	62	};
	63
	64	enum {
	65	PRR_RCAR,
	66	};
	67
	68	static u32 rmobile_get_prr(void)
	69	{
	70	struct regmap *map;
	71
	72	map = syscon_get_regmap_by_driver_data(PRR_RCAR);
	73	if (!map) {
	74	printf("PRR regmap failed!\n");
	75	hang();
	76	}
	77
	78	return readl(map->base);
	79	}
	80
	81	static const struct udevice_id renesas_prr_ids[] = {
	82	{ .compatible = "renesas,prr", .data = PRR_RCAR },
	83	{ }
	84	};
	85
	86	U_BOOT_DRIVER(renesas_prr) = {
	87	.name = "renesas_prr",
	88	.id = UCLASS_SYSCON,
	89	.of_match = renesas_prr_ids,
	90	.flags = DM_FLAG_PRE_RELOC,
	91	};
	92	#endif