drivers/cpu/bmips_cpu.c - uboot-imx - Git at Google

 // SPDX-License-Identifier: GPL-2.0+
 /*
  * Copyright (C) 2017 Álvaro Fernández Rojas <noltari@gmail.com>
  *
  * Derived from linux/arch/mips/bcm63xx/cpu.c:
  *	Copyright (C) 2008 Maxime Bizon <mbizon@freebox.fr>
  *	Copyright (C) 2009 Florian Fainelli <florian@openwrt.org>
  */

 #include <common.h>
 #include <cpu.h>
 #include <dm.h>
 #include <errno.h>
 #include <asm/io.h>

 #define REV_CHIPID_SHIFT		16
 #define REV_CHIPID_MASK			(0xffff << REV_CHIPID_SHIFT)
 #define REV_LONG_CHIPID_SHIFT		12
 #define REV_LONG_CHIPID_MASK		(0xfffff << REV_LONG_CHIPID_SHIFT)
 #define REV_REVID_SHIFT			0
 #define REV_REVID_MASK			(0xff << REV_REVID_SHIFT)

 #define REG_BCM6328_OTP			0x62c
 #define BCM6328_TP1_DISABLED		BIT(9)

 #define REG_BCM6318_STRAP_OVRDBUS	0x900
 #define OVRDBUS_6318_FREQ_SHIFT		23
 #define OVRDBUS_6318_FREQ_MASK		(0x3 << OVRDBUS_6318_FREQ_SHIFT)

 #define REG_BCM6328_MISC_STRAPBUS	0x1a40
 #define STRAPBUS_6328_FCVO_SHIFT	7
 #define STRAPBUS_6328_FCVO_MASK		(0x1f << STRAPBUS_6328_FCVO_SHIFT)

 #define REG_BCM6348_PERF_MIPSPLLCFG	0x34
 #define MIPSPLLCFG_6348_M1CPU_SHIFT	6
 #define MIPSPLLCFG_6348_M1CPU_MASK	(0x7 << MIPSPLLCFG_6348_M1CPU_SHIFT)
 #define MIPSPLLCFG_6348_N2_SHIFT	15
 #define MIPSPLLCFG_6348_N2_MASK		(0x1F << MIPSPLLCFG_6348_N2_SHIFT)
 #define MIPSPLLCFG_6348_N1_SHIFT	20
 #define MIPSPLLCFG_6348_N1_MASK		(0x7 << MIPSPLLCFG_6348_N1_SHIFT)

 #define REG_BCM6358_DDR_DMIPSPLLCFG	0x12b8
 #define DMIPSPLLCFG_6358_M1_SHIFT	0
 #define DMIPSPLLCFG_6358_M1_MASK	(0xff << DMIPSPLLCFG_6358_M1_SHIFT)
 #define DMIPSPLLCFG_6358_N1_SHIFT	23
 #define DMIPSPLLCFG_6358_N1_MASK	(0x3f << DMIPSPLLCFG_6358_N1_SHIFT)
 #define DMIPSPLLCFG_6358_N2_SHIFT	29
 #define DMIPSPLLCFG_6358_N2_MASK	(0x7 << DMIPSPLLCFG_6358_N2_SHIFT)

 #define REG_BCM6362_MISC_STRAPBUS	0x1814
 #define STRAPBUS_6362_FCVO_SHIFT	1
 #define STRAPBUS_6362_FCVO_MASK		(0x1f << STRAPBUS_6362_FCVO_SHIFT)

 #define REG_BCM6368_DDR_DMIPSPLLCFG	0x12a0
 #define DMIPSPLLCFG_6368_P1_SHIFT	0
 #define DMIPSPLLCFG_6368_P1_MASK	(0xf << DMIPSPLLCFG_6368_P1_SHIFT)
 #define DMIPSPLLCFG_6368_P2_SHIFT	4
 #define DMIPSPLLCFG_6368_P2_MASK	(0xf << DMIPSPLLCFG_6368_P2_SHIFT)
 #define DMIPSPLLCFG_6368_NDIV_SHIFT	16
 #define DMIPSPLLCFG_6368_NDIV_MASK	(0x1ff << DMIPSPLLCFG_6368_NDIV_SHIFT)
 #define REG_BCM6368_DDR_DMIPSPLLDIV	0x12a4
 #define DMIPSPLLDIV_6368_MDIV_SHIFT	0
 #define DMIPSPLLDIV_6368_MDIV_MASK	(0xff << DMIPSPLLDIV_6368_MDIV_SHIFT)

 #define REG_BCM63268_MISC_STRAPBUS	0x1814
 #define STRAPBUS_63268_FCVO_SHIFT	21
 #define STRAPBUS_63268_FCVO_MASK	(0xf << STRAPBUS_63268_FCVO_SHIFT)

 #define REG_BCM6838_OTP_BRCMBITS0	0x440
 #define VIPER_6838_FREQ_SHIFT		18
 #define VIPER_6838_FREQ_MASK		(0x7 << VIPER_6838_FREQ_SHIFT)

 struct bmips_cpu_priv;

 struct bmips_cpu_hw {
 	int (*get_cpu_desc)(struct bmips_cpu_priv *priv, char *buf, int size);
 	ulong (*get_cpu_freq)(struct bmips_cpu_priv *);
 	int (*get_cpu_count)(struct bmips_cpu_priv *);
 };

 struct bmips_cpu_priv {
 	void __iomem *regs;
 	const struct bmips_cpu_hw *hw;
 };

 /* Specific CPU Ops */
 static int bmips_short_cpu_desc(struct bmips_cpu_priv *priv, char *buf,
 				int size)
 {
 	unsigned short cpu_id;
 	unsigned char cpu_rev;
 	u32 val;

 	val = readl_be(priv->regs);
 	cpu_id = (val & REV_CHIPID_MASK) >> REV_CHIPID_SHIFT;
 	cpu_rev = (val & REV_REVID_MASK) >> REV_REVID_SHIFT;

 	snprintf(buf, size, "BCM%04X%02X", cpu_id, cpu_rev);

 	return 0;
 }

 static int bmips_long_cpu_desc(struct bmips_cpu_priv *priv, char *buf,
 				int size)
 {
 	unsigned int cpu_id;
 	unsigned char cpu_rev;
 	u32 val;

 	val = readl_be(priv->regs);
 	cpu_id = (val & REV_LONG_CHIPID_MASK) >> REV_LONG_CHIPID_SHIFT;
 	cpu_rev = (val & REV_REVID_MASK) >> REV_REVID_SHIFT;

 	snprintf(buf, size, "BCM%05X%02X", cpu_id, cpu_rev);

 	return 0;
 }

 static ulong bcm3380_get_cpu_freq(struct bmips_cpu_priv *priv)
 {
 	return 333000000;
 }

 static ulong bcm6318_get_cpu_freq(struct bmips_cpu_priv *priv)
 {
 	unsigned int mips_pll_fcvo;

 	mips_pll_fcvo = readl_be(priv->regs + REG_BCM6318_STRAP_OVRDBUS);
 	mips_pll_fcvo = (mips_pll_fcvo & OVRDBUS_6318_FREQ_MASK)
 			>> OVRDBUS_6318_FREQ_SHIFT;

 	switch (mips_pll_fcvo) {
 	case 0:
 		return 166000000;
 	case 1:
 		return 400000000;
 	case 2:
 		return 250000000;
 	case 3:
 		return 333000000;
 	default:
 		return 0;
 	}
 }

 static ulong bcm6328_get_cpu_freq(struct bmips_cpu_priv *priv)
 {
 	unsigned int mips_pll_fcvo;

 	mips_pll_fcvo = readl_be(priv->regs + REG_BCM6328_MISC_STRAPBUS);
 	mips_pll_fcvo = (mips_pll_fcvo & STRAPBUS_6328_FCVO_MASK)
 			>> STRAPBUS_6328_FCVO_SHIFT;

 	switch (mips_pll_fcvo) {
 	case 0x12:
 	case 0x14:
 	case 0x19:
 		return 160000000;
 	case 0x1c:
 		return 192000000;
 	case 0x13:
 	case 0x15:
 		return 200000000;
 	case 0x1a:
 		return 384000000;
 	case 0x16:
 		return 400000000;
 	default:
 		return 320000000;
 	}
 }

 static ulong bcm6338_get_cpu_freq(struct bmips_cpu_priv *priv)
 {
 	return 240000000;
 }

 static ulong bcm6348_get_cpu_freq(struct bmips_cpu_priv *priv)
 {
 	unsigned int tmp, n1, n2, m1;

 	tmp = readl_be(priv->regs + REG_BCM6348_PERF_MIPSPLLCFG);
 	n1 = (tmp & MIPSPLLCFG_6348_N1_MASK) >> MIPSPLLCFG_6348_N1_SHIFT;
 	n2 = (tmp & MIPSPLLCFG_6348_N2_MASK) >> MIPSPLLCFG_6348_N2_SHIFT;
 	m1 = (tmp & MIPSPLLCFG_6348_M1CPU_MASK) >> MIPSPLLCFG_6348_M1CPU_SHIFT;

 	return (16 * 1000000 * (n1 + 1) * (n2 + 2)) / (m1 + 1);
 }

 static ulong bcm6358_get_cpu_freq(struct bmips_cpu_priv *priv)
 {
 	unsigned int tmp, n1, n2, m1;

 	tmp = readl_be(priv->regs + REG_BCM6358_DDR_DMIPSPLLCFG);
 	n1 = (tmp & DMIPSPLLCFG_6358_N1_MASK) >> DMIPSPLLCFG_6358_N1_SHIFT;
 	n2 = (tmp & DMIPSPLLCFG_6358_N2_MASK) >> DMIPSPLLCFG_6358_N2_SHIFT;
 	m1 = (tmp & DMIPSPLLCFG_6358_M1_MASK) >> DMIPSPLLCFG_6358_M1_SHIFT;

 	return (16 * 1000000 * n1 * n2) / m1;
 }

 static ulong bcm6362_get_cpu_freq(struct bmips_cpu_priv *priv)
 {
 	unsigned int mips_pll_fcvo;

 	mips_pll_fcvo = readl_be(priv->regs + REG_BCM6362_MISC_STRAPBUS);
 	mips_pll_fcvo = (mips_pll_fcvo & STRAPBUS_6362_FCVO_MASK)
 			>> STRAPBUS_6362_FCVO_SHIFT;

 	switch (mips_pll_fcvo) {
 	case 0x03:
 	case 0x0b:
 	case 0x13:
 	case 0x1b:
 		return 240000000;
 	case 0x04:
 	case 0x0c:
 	case 0x14:
 	case 0x1c:
 		return 160000000;
 	case 0x05:
 	case 0x0e:
 	case 0x16:
 	case 0x1e:
 	case 0x1f:
 		return 400000000;
 	case 0x06:
 		return 440000000;
 	case 0x07:
 	case 0x17:
 		return 384000000;
 	case 0x15:
 	case 0x1d:
 		return 200000000;
 	default:
 		return 320000000;
 	}
 }

 static ulong bcm6368_get_cpu_freq(struct bmips_cpu_priv *priv)
 {
 	unsigned int tmp, p1, p2, ndiv, m1;

 	tmp = readl_be(priv->regs + REG_BCM6368_DDR_DMIPSPLLCFG);
 	p1 = (tmp & DMIPSPLLCFG_6368_P1_MASK) >> DMIPSPLLCFG_6368_P1_SHIFT;
 	p2 = (tmp & DMIPSPLLCFG_6368_P2_MASK) >> DMIPSPLLCFG_6368_P2_SHIFT;
 	ndiv = (tmp & DMIPSPLLCFG_6368_NDIV_MASK) >>
 	       DMIPSPLLCFG_6368_NDIV_SHIFT;

 	tmp = readl_be(priv->regs + REG_BCM6368_DDR_DMIPSPLLDIV);
 	m1 = (tmp & DMIPSPLLDIV_6368_MDIV_MASK) >> DMIPSPLLDIV_6368_MDIV_SHIFT;

 	return (((64 * 1000000) / p1) * p2 * ndiv) / m1;
 }

 static ulong bcm63268_get_cpu_freq(struct bmips_cpu_priv *priv)
 {
 	unsigned int mips_pll_fcvo;

 	mips_pll_fcvo = readl_be(priv->regs + REG_BCM63268_MISC_STRAPBUS);
 	mips_pll_fcvo = (mips_pll_fcvo & STRAPBUS_63268_FCVO_MASK)
 			>> STRAPBUS_63268_FCVO_SHIFT;

 	switch (mips_pll_fcvo) {
 	case 0x3:
 	case 0xe:
 		return 320000000;
 	case 0xa:
 		return 333000000;
 	case 0x2:
 	case 0xb:
 	case 0xf:
 		return 400000000;
 	default:
 		return 0;
 	}
 }

 static ulong bcm6838_get_cpu_freq(struct bmips_cpu_priv *priv)
 {
 	unsigned int mips_viper_freq;

 	mips_viper_freq = readl_be(priv->regs + REG_BCM6838_OTP_BRCMBITS0);
 	mips_viper_freq = (mips_viper_freq & VIPER_6838_FREQ_MASK)
 		>> VIPER_6838_FREQ_SHIFT;

 	switch (mips_viper_freq) {
 	case 0x0:
 		return 600000000;
 	case 0x1:
 		return 400000000;
 	case 0x2:
 		return 240000000;
 	default:
 		return 0;
 	}
 }

 static int bcm6328_get_cpu_count(struct bmips_cpu_priv *priv)
 {
 	u32 val = readl_be(priv->regs + REG_BCM6328_OTP);

 	if (val & BCM6328_TP1_DISABLED)
 		return 1;
 	else
 		return 2;
 }

 static int bcm6345_get_cpu_count(struct bmips_cpu_priv *priv)
 {
 	return 1;
 }

 static int bcm6358_get_cpu_count(struct bmips_cpu_priv *priv)
 {
 	return 2;
 }

 static const struct bmips_cpu_hw bmips_cpu_bcm3380 = {
 	.get_cpu_desc = bmips_short_cpu_desc,
 	.get_cpu_freq = bcm3380_get_cpu_freq,
 	.get_cpu_count = bcm6358_get_cpu_count,
 };

 static const struct bmips_cpu_hw bmips_cpu_bcm6318 = {
 	.get_cpu_desc = bmips_short_cpu_desc,
 	.get_cpu_freq = bcm6318_get_cpu_freq,
 	.get_cpu_count = bcm6345_get_cpu_count,
 };

 static const struct bmips_cpu_hw bmips_cpu_bcm6328 = {
 	.get_cpu_desc = bmips_long_cpu_desc,
 	.get_cpu_freq = bcm6328_get_cpu_freq,
 	.get_cpu_count = bcm6328_get_cpu_count,
 };

 static const struct bmips_cpu_hw bmips_cpu_bcm6338 = {
 	.get_cpu_desc = bmips_short_cpu_desc,
 	.get_cpu_freq = bcm6338_get_cpu_freq,
 	.get_cpu_count = bcm6345_get_cpu_count,
 };

 static const struct bmips_cpu_hw bmips_cpu_bcm6348 = {
 	.get_cpu_desc = bmips_short_cpu_desc,
 	.get_cpu_freq = bcm6348_get_cpu_freq,
 	.get_cpu_count = bcm6345_get_cpu_count,
 };

 static const struct bmips_cpu_hw bmips_cpu_bcm6358 = {
 	.get_cpu_desc = bmips_short_cpu_desc,
 	.get_cpu_freq = bcm6358_get_cpu_freq,
 	.get_cpu_count = bcm6358_get_cpu_count,
 };

 static const struct bmips_cpu_hw bmips_cpu_bcm6362 = {
 	.get_cpu_desc = bmips_short_cpu_desc,
 	.get_cpu_freq = bcm6362_get_cpu_freq,
 	.get_cpu_count = bcm6358_get_cpu_count,
 };

 static const struct bmips_cpu_hw bmips_cpu_bcm6368 = {
 	.get_cpu_desc = bmips_short_cpu_desc,
 	.get_cpu_freq = bcm6368_get_cpu_freq,
 	.get_cpu_count = bcm6358_get_cpu_count,
 };

 static const struct bmips_cpu_hw bmips_cpu_bcm63268 = {
 	.get_cpu_desc = bmips_long_cpu_desc,
 	.get_cpu_freq = bcm63268_get_cpu_freq,
 	.get_cpu_count = bcm6358_get_cpu_count,
 };

 static const struct bmips_cpu_hw bmips_cpu_bcm6838 = {
 	.get_cpu_desc = bmips_short_cpu_desc,
 	.get_cpu_freq = bcm6838_get_cpu_freq,
 	.get_cpu_count = bcm6358_get_cpu_count,
 };

 /* Generic CPU Ops */
 static int bmips_cpu_get_desc(struct udevice *dev, char *buf, int size)
 {
 	struct bmips_cpu_priv *priv = dev_get_priv(dev);
 	const struct bmips_cpu_hw *hw = priv->hw;

 	return hw->get_cpu_desc(priv, buf, size);
 }

 static int bmips_cpu_get_info(struct udevice *dev, struct cpu_info *info)
 {
 	struct bmips_cpu_priv *priv = dev_get_priv(dev);
 	const struct bmips_cpu_hw *hw = priv->hw;

 	info->cpu_freq = hw->get_cpu_freq(priv);
 	info->features = BIT(CPU_FEAT_L1_CACHE);
 	info->features |= BIT(CPU_FEAT_MMU);
 	info->features |= BIT(CPU_FEAT_DEVICE_ID);

 	return 0;
 }

 static int bmips_cpu_get_count(struct udevice *dev)
 {
 	struct bmips_cpu_priv *priv = dev_get_priv(dev);
 	const struct bmips_cpu_hw *hw = priv->hw;

 	return hw->get_cpu_count(priv);
 }

 static int bmips_cpu_get_vendor(struct udevice *dev, char *buf, int size)
 {
 	snprintf(buf, size, "Broadcom");

 	return 0;
 }

 static const struct cpu_ops bmips_cpu_ops = {
 	.get_desc = bmips_cpu_get_desc,
 	.get_info = bmips_cpu_get_info,
 	.get_count = bmips_cpu_get_count,
 	.get_vendor = bmips_cpu_get_vendor,
 };

 /* BMIPS CPU driver */
 int bmips_cpu_bind(struct udevice *dev)
 {
 	struct cpu_platdata *plat = dev_get_parent_platdata(dev);

 	plat->cpu_id = dev_read_u32_default(dev, "reg", -1);
 	plat->device_id = read_c0_prid();

 	return 0;
 }

 int bmips_cpu_probe(struct udevice *dev)
 {
 	struct bmips_cpu_priv *priv = dev_get_priv(dev);
 	const struct bmips_cpu_hw *hw =
 		(const struct bmips_cpu_hw *)dev_get_driver_data(dev);

 	priv->regs = dev_remap_addr(dev_get_parent(dev));
 	if (!priv->regs)
 		return -EINVAL;

 	priv->hw = hw;

 	return 0;
 }

 static const struct udevice_id bmips_cpu_ids[] = {
 	{
 		.compatible = "brcm,bcm3380-cpu",
 		.data = (ulong)&bmips_cpu_bcm3380,
 	}, {
 		.compatible = "brcm,bcm6318-cpu",
 		.data = (ulong)&bmips_cpu_bcm6318,
 	}, {
 		.compatible = "brcm,bcm6328-cpu",
 		.data = (ulong)&bmips_cpu_bcm6328,
 	}, {
 		.compatible = "brcm,bcm6338-cpu",
 		.data = (ulong)&bmips_cpu_bcm6338,
 	}, {
 		.compatible = "brcm,bcm6348-cpu",
 		.data = (ulong)&bmips_cpu_bcm6348,
 	}, {
 		.compatible = "brcm,bcm6358-cpu",
 		.data = (ulong)&bmips_cpu_bcm6358,
 	}, {
 		.compatible = "brcm,bcm6362-cpu",
 		.data = (ulong)&bmips_cpu_bcm6362,
 	}, {
 		.compatible = "brcm,bcm6368-cpu",
 		.data = (ulong)&bmips_cpu_bcm6368,
 	}, {
 		.compatible = "brcm,bcm63268-cpu",
 		.data = (ulong)&bmips_cpu_bcm63268,
 	}, {
 		.compatible = "brcm,bcm6838-cpu",
 		.data = (ulong)&bmips_cpu_bcm6838,
 	},
 	{ /* sentinel */ }
 };

 U_BOOT_DRIVER(bmips_cpu_drv) = {
 	.name = "bmips_cpu",
 	.id = UCLASS_CPU,
 	.of_match = bmips_cpu_ids,
 	.bind = bmips_cpu_bind,
 	.probe = bmips_cpu_probe,
 	.priv_auto_alloc_size = sizeof(struct bmips_cpu_priv),
 	.ops = &bmips_cpu_ops,
 	.flags = DM_FLAG_PRE_RELOC,
 };

 #ifdef CONFIG_DISPLAY_CPUINFO
 int print_cpuinfo(void)
 {
 	struct cpu_info cpu;
 	struct udevice *dev;
 	int err;
 	char desc[100];

 	err = uclass_get_device(UCLASS_CPU, 0, &dev);
 	if (err)
 		return 0;

 	err = cpu_get_info(dev, &cpu);
 	if (err)
 		return 0;

 	err = cpu_get_desc(dev, desc, sizeof(desc));
 	if (err)
 		return 0;

 	printf("Chip ID: %s, MIPS: ", desc);
 	print_freq(cpu.cpu_freq, "\n");

 	return 0;
 }
 #endif
	// SPDX-License-Identifier: GPL-2.0+
	/*
	* Copyright (C) 2017 Álvaro Fernández Rojas <noltari@gmail.com>
	*
	* Derived from linux/arch/mips/bcm63xx/cpu.c:
	* Copyright (C) 2008 Maxime Bizon <mbizon@freebox.fr>
	* Copyright (C) 2009 Florian Fainelli <florian@openwrt.org>
	*/

	#include <common.h>
	#include <cpu.h>
	#include <dm.h>
	#include <errno.h>
	#include <asm/io.h>

	#define REV_CHIPID_SHIFT 16
	#define REV_CHIPID_MASK (0xffff << REV_CHIPID_SHIFT)
	#define REV_LONG_CHIPID_SHIFT 12
	#define REV_LONG_CHIPID_MASK (0xfffff << REV_LONG_CHIPID_SHIFT)
	#define REV_REVID_SHIFT 0
	#define REV_REVID_MASK (0xff << REV_REVID_SHIFT)

	#define REG_BCM6328_OTP 0x62c
	#define BCM6328_TP1_DISABLED BIT(9)

	#define REG_BCM6318_STRAP_OVRDBUS 0x900
	#define OVRDBUS_6318_FREQ_SHIFT 23
	#define OVRDBUS_6318_FREQ_MASK (0x3 << OVRDBUS_6318_FREQ_SHIFT)

	#define REG_BCM6328_MISC_STRAPBUS 0x1a40
	#define STRAPBUS_6328_FCVO_SHIFT 7
	#define STRAPBUS_6328_FCVO_MASK (0x1f << STRAPBUS_6328_FCVO_SHIFT)

	#define REG_BCM6348_PERF_MIPSPLLCFG 0x34
	#define MIPSPLLCFG_6348_M1CPU_SHIFT 6
	#define MIPSPLLCFG_6348_M1CPU_MASK (0x7 << MIPSPLLCFG_6348_M1CPU_SHIFT)
	#define MIPSPLLCFG_6348_N2_SHIFT 15
	#define MIPSPLLCFG_6348_N2_MASK (0x1F << MIPSPLLCFG_6348_N2_SHIFT)
	#define MIPSPLLCFG_6348_N1_SHIFT 20
	#define MIPSPLLCFG_6348_N1_MASK (0x7 << MIPSPLLCFG_6348_N1_SHIFT)

	#define REG_BCM6358_DDR_DMIPSPLLCFG 0x12b8
	#define DMIPSPLLCFG_6358_M1_SHIFT 0
	#define DMIPSPLLCFG_6358_M1_MASK (0xff << DMIPSPLLCFG_6358_M1_SHIFT)
	#define DMIPSPLLCFG_6358_N1_SHIFT 23
	#define DMIPSPLLCFG_6358_N1_MASK (0x3f << DMIPSPLLCFG_6358_N1_SHIFT)
	#define DMIPSPLLCFG_6358_N2_SHIFT 29
	#define DMIPSPLLCFG_6358_N2_MASK (0x7 << DMIPSPLLCFG_6358_N2_SHIFT)

	#define REG_BCM6362_MISC_STRAPBUS 0x1814
	#define STRAPBUS_6362_FCVO_SHIFT 1
	#define STRAPBUS_6362_FCVO_MASK (0x1f << STRAPBUS_6362_FCVO_SHIFT)

	#define REG_BCM6368_DDR_DMIPSPLLCFG 0x12a0
	#define DMIPSPLLCFG_6368_P1_SHIFT 0
	#define DMIPSPLLCFG_6368_P1_MASK (0xf << DMIPSPLLCFG_6368_P1_SHIFT)
	#define DMIPSPLLCFG_6368_P2_SHIFT 4
	#define DMIPSPLLCFG_6368_P2_MASK (0xf << DMIPSPLLCFG_6368_P2_SHIFT)
	#define DMIPSPLLCFG_6368_NDIV_SHIFT 16
	#define DMIPSPLLCFG_6368_NDIV_MASK (0x1ff << DMIPSPLLCFG_6368_NDIV_SHIFT)
	#define REG_BCM6368_DDR_DMIPSPLLDIV 0x12a4
	#define DMIPSPLLDIV_6368_MDIV_SHIFT 0
	#define DMIPSPLLDIV_6368_MDIV_MASK (0xff << DMIPSPLLDIV_6368_MDIV_SHIFT)

	#define REG_BCM63268_MISC_STRAPBUS 0x1814
	#define STRAPBUS_63268_FCVO_SHIFT 21
	#define STRAPBUS_63268_FCVO_MASK (0xf << STRAPBUS_63268_FCVO_SHIFT)

	#define REG_BCM6838_OTP_BRCMBITS0 0x440
	#define VIPER_6838_FREQ_SHIFT 18
	#define VIPER_6838_FREQ_MASK (0x7 << VIPER_6838_FREQ_SHIFT)

	struct bmips_cpu_priv;

	struct bmips_cpu_hw {
	int (get_cpu_desc)(struct bmips_cpu_priv priv, char *buf, int size);
	ulong (get_cpu_freq)(struct bmips_cpu_priv );
	int (get_cpu_count)(struct bmips_cpu_priv );
	};

	struct bmips_cpu_priv {
	void __iomem *regs;
	const struct bmips_cpu_hw *hw;
	};

	/* Specific CPU Ops */
	static int bmips_short_cpu_desc(struct bmips_cpu_priv priv, char buf,
	int size)
	{
	unsigned short cpu_id;
	unsigned char cpu_rev;
	u32 val;

	val = readl_be(priv->regs);
	cpu_id = (val & REV_CHIPID_MASK) >> REV_CHIPID_SHIFT;
	cpu_rev = (val & REV_REVID_MASK) >> REV_REVID_SHIFT;

	snprintf(buf, size, "BCM%04X%02X", cpu_id, cpu_rev);

	return 0;
	}

	static int bmips_long_cpu_desc(struct bmips_cpu_priv priv, char buf,
	int size)
	{
	unsigned int cpu_id;
	unsigned char cpu_rev;
	u32 val;

	val = readl_be(priv->regs);
	cpu_id = (val & REV_LONG_CHIPID_MASK) >> REV_LONG_CHIPID_SHIFT;
	cpu_rev = (val & REV_REVID_MASK) >> REV_REVID_SHIFT;

	snprintf(buf, size, "BCM%05X%02X", cpu_id, cpu_rev);

	return 0;
	}

	static ulong bcm3380_get_cpu_freq(struct bmips_cpu_priv *priv)
	{
	return 333000000;
	}

	static ulong bcm6318_get_cpu_freq(struct bmips_cpu_priv *priv)
	{
	unsigned int mips_pll_fcvo;

	mips_pll_fcvo = readl_be(priv->regs + REG_BCM6318_STRAP_OVRDBUS);
	mips_pll_fcvo = (mips_pll_fcvo & OVRDBUS_6318_FREQ_MASK)
	>> OVRDBUS_6318_FREQ_SHIFT;

	switch (mips_pll_fcvo) {
	case 0:
	return 166000000;
	case 1:
	return 400000000;
	case 2:
	return 250000000;
	case 3:
	return 333000000;
	default:
	return 0;
	}
	}

	static ulong bcm6328_get_cpu_freq(struct bmips_cpu_priv *priv)
	{
	unsigned int mips_pll_fcvo;

	mips_pll_fcvo = readl_be(priv->regs + REG_BCM6328_MISC_STRAPBUS);
	mips_pll_fcvo = (mips_pll_fcvo & STRAPBUS_6328_FCVO_MASK)
	>> STRAPBUS_6328_FCVO_SHIFT;

	switch (mips_pll_fcvo) {
	case 0x12:
	case 0x14:
	case 0x19:
	return 160000000;
	case 0x1c:
	return 192000000;
	case 0x13:
	case 0x15:
	return 200000000;
	case 0x1a:
	return 384000000;
	case 0x16:
	return 400000000;
	default:
	return 320000000;
	}
	}

	static ulong bcm6338_get_cpu_freq(struct bmips_cpu_priv *priv)
	{
	return 240000000;
	}

	static ulong bcm6348_get_cpu_freq(struct bmips_cpu_priv *priv)
	{
	unsigned int tmp, n1, n2, m1;

	tmp = readl_be(priv->regs + REG_BCM6348_PERF_MIPSPLLCFG);
	n1 = (tmp & MIPSPLLCFG_6348_N1_MASK) >> MIPSPLLCFG_6348_N1_SHIFT;
	n2 = (tmp & MIPSPLLCFG_6348_N2_MASK) >> MIPSPLLCFG_6348_N2_SHIFT;
	m1 = (tmp & MIPSPLLCFG_6348_M1CPU_MASK) >> MIPSPLLCFG_6348_M1CPU_SHIFT;

	return (16 * 1000000 * (n1 + 1) * (n2 + 2)) / (m1 + 1);
	}

	static ulong bcm6358_get_cpu_freq(struct bmips_cpu_priv *priv)
	{
	unsigned int tmp, n1, n2, m1;

	tmp = readl_be(priv->regs + REG_BCM6358_DDR_DMIPSPLLCFG);
	n1 = (tmp & DMIPSPLLCFG_6358_N1_MASK) >> DMIPSPLLCFG_6358_N1_SHIFT;
	n2 = (tmp & DMIPSPLLCFG_6358_N2_MASK) >> DMIPSPLLCFG_6358_N2_SHIFT;
	m1 = (tmp & DMIPSPLLCFG_6358_M1_MASK) >> DMIPSPLLCFG_6358_M1_SHIFT;

	return (16 * 1000000 * n1 * n2) / m1;
	}

	static ulong bcm6362_get_cpu_freq(struct bmips_cpu_priv *priv)
	{
	unsigned int mips_pll_fcvo;

	mips_pll_fcvo = readl_be(priv->regs + REG_BCM6362_MISC_STRAPBUS);
	mips_pll_fcvo = (mips_pll_fcvo & STRAPBUS_6362_FCVO_MASK)
	>> STRAPBUS_6362_FCVO_SHIFT;

	switch (mips_pll_fcvo) {
	case 0x03:
	case 0x0b:
	case 0x13:
	case 0x1b:
	return 240000000;
	case 0x04:
	case 0x0c:
	case 0x14:
	case 0x1c:
	return 160000000;
	case 0x05:
	case 0x0e:
	case 0x16:
	case 0x1e:
	case 0x1f:
	return 400000000;
	case 0x06:
	return 440000000;
	case 0x07:
	case 0x17:
	return 384000000;
	case 0x15:
	case 0x1d:
	return 200000000;
	default:
	return 320000000;
	}
	}

	static ulong bcm6368_get_cpu_freq(struct bmips_cpu_priv *priv)
	{
	unsigned int tmp, p1, p2, ndiv, m1;

	tmp = readl_be(priv->regs + REG_BCM6368_DDR_DMIPSPLLCFG);
	p1 = (tmp & DMIPSPLLCFG_6368_P1_MASK) >> DMIPSPLLCFG_6368_P1_SHIFT;
	p2 = (tmp & DMIPSPLLCFG_6368_P2_MASK) >> DMIPSPLLCFG_6368_P2_SHIFT;
	ndiv = (tmp & DMIPSPLLCFG_6368_NDIV_MASK) >>
	DMIPSPLLCFG_6368_NDIV_SHIFT;

	tmp = readl_be(priv->regs + REG_BCM6368_DDR_DMIPSPLLDIV);
	m1 = (tmp & DMIPSPLLDIV_6368_MDIV_MASK) >> DMIPSPLLDIV_6368_MDIV_SHIFT;

	return (((64 * 1000000) / p1) * p2 * ndiv) / m1;
	}

	static ulong bcm63268_get_cpu_freq(struct bmips_cpu_priv *priv)
	{
	unsigned int mips_pll_fcvo;

	mips_pll_fcvo = readl_be(priv->regs + REG_BCM63268_MISC_STRAPBUS);
	mips_pll_fcvo = (mips_pll_fcvo & STRAPBUS_63268_FCVO_MASK)
	>> STRAPBUS_63268_FCVO_SHIFT;

	switch (mips_pll_fcvo) {
	case 0x3:
	case 0xe:
	return 320000000;
	case 0xa:
	return 333000000;
	case 0x2:
	case 0xb:
	case 0xf:
	return 400000000;
	default:
	return 0;
	}
	}

	static ulong bcm6838_get_cpu_freq(struct bmips_cpu_priv *priv)
	{
	unsigned int mips_viper_freq;

	mips_viper_freq = readl_be(priv->regs + REG_BCM6838_OTP_BRCMBITS0);
	mips_viper_freq = (mips_viper_freq & VIPER_6838_FREQ_MASK)
	>> VIPER_6838_FREQ_SHIFT;

	switch (mips_viper_freq) {
	case 0x0:
	return 600000000;
	case 0x1:
	return 400000000;
	case 0x2:
	return 240000000;
	default:
	return 0;
	}
	}

	static int bcm6328_get_cpu_count(struct bmips_cpu_priv *priv)
	{
	u32 val = readl_be(priv->regs + REG_BCM6328_OTP);

	if (val & BCM6328_TP1_DISABLED)
	return 1;
	else
	return 2;
	}

	static int bcm6345_get_cpu_count(struct bmips_cpu_priv *priv)
	{
	return 1;
	}

	static int bcm6358_get_cpu_count(struct bmips_cpu_priv *priv)
	{
	return 2;
	}

	static const struct bmips_cpu_hw bmips_cpu_bcm3380 = {
	.get_cpu_desc = bmips_short_cpu_desc,
	.get_cpu_freq = bcm3380_get_cpu_freq,
	.get_cpu_count = bcm6358_get_cpu_count,
	};

	static const struct bmips_cpu_hw bmips_cpu_bcm6318 = {
	.get_cpu_desc = bmips_short_cpu_desc,
	.get_cpu_freq = bcm6318_get_cpu_freq,
	.get_cpu_count = bcm6345_get_cpu_count,
	};

	static const struct bmips_cpu_hw bmips_cpu_bcm6328 = {
	.get_cpu_desc = bmips_long_cpu_desc,
	.get_cpu_freq = bcm6328_get_cpu_freq,
	.get_cpu_count = bcm6328_get_cpu_count,
	};

	static const struct bmips_cpu_hw bmips_cpu_bcm6338 = {
	.get_cpu_desc = bmips_short_cpu_desc,
	.get_cpu_freq = bcm6338_get_cpu_freq,
	.get_cpu_count = bcm6345_get_cpu_count,
	};

	static const struct bmips_cpu_hw bmips_cpu_bcm6348 = {
	.get_cpu_desc = bmips_short_cpu_desc,
	.get_cpu_freq = bcm6348_get_cpu_freq,
	.get_cpu_count = bcm6345_get_cpu_count,
	};

	static const struct bmips_cpu_hw bmips_cpu_bcm6358 = {
	.get_cpu_desc = bmips_short_cpu_desc,
	.get_cpu_freq = bcm6358_get_cpu_freq,
	.get_cpu_count = bcm6358_get_cpu_count,
	};

	static const struct bmips_cpu_hw bmips_cpu_bcm6362 = {
	.get_cpu_desc = bmips_short_cpu_desc,
	.get_cpu_freq = bcm6362_get_cpu_freq,
	.get_cpu_count = bcm6358_get_cpu_count,
	};

	static const struct bmips_cpu_hw bmips_cpu_bcm6368 = {
	.get_cpu_desc = bmips_short_cpu_desc,
	.get_cpu_freq = bcm6368_get_cpu_freq,
	.get_cpu_count = bcm6358_get_cpu_count,
	};

	static const struct bmips_cpu_hw bmips_cpu_bcm63268 = {
	.get_cpu_desc = bmips_long_cpu_desc,
	.get_cpu_freq = bcm63268_get_cpu_freq,
	.get_cpu_count = bcm6358_get_cpu_count,
	};

	static const struct bmips_cpu_hw bmips_cpu_bcm6838 = {
	.get_cpu_desc = bmips_short_cpu_desc,
	.get_cpu_freq = bcm6838_get_cpu_freq,
	.get_cpu_count = bcm6358_get_cpu_count,
	};

	/* Generic CPU Ops */
	static int bmips_cpu_get_desc(struct udevice dev, char buf, int size)
	{
	struct bmips_cpu_priv *priv = dev_get_priv(dev);
	const struct bmips_cpu_hw *hw = priv->hw;

	return hw->get_cpu_desc(priv, buf, size);
	}

	static int bmips_cpu_get_info(struct udevice dev, struct cpu_info info)
	{
	struct bmips_cpu_priv *priv = dev_get_priv(dev);
	const struct bmips_cpu_hw *hw = priv->hw;

	info->cpu_freq = hw->get_cpu_freq(priv);
	info->features = BIT(CPU_FEAT_L1_CACHE);
	info->features \|= BIT(CPU_FEAT_MMU);
	info->features \|= BIT(CPU_FEAT_DEVICE_ID);

	return 0;
	}

	static int bmips_cpu_get_count(struct udevice *dev)
	{
	struct bmips_cpu_priv *priv = dev_get_priv(dev);
	const struct bmips_cpu_hw *hw = priv->hw;

	return hw->get_cpu_count(priv);
	}

	static int bmips_cpu_get_vendor(struct udevice dev, char buf, int size)
	{
	snprintf(buf, size, "Broadcom");

	return 0;
	}

	static const struct cpu_ops bmips_cpu_ops = {
	.get_desc = bmips_cpu_get_desc,
	.get_info = bmips_cpu_get_info,
	.get_count = bmips_cpu_get_count,
	.get_vendor = bmips_cpu_get_vendor,
	};

	/* BMIPS CPU driver */
	int bmips_cpu_bind(struct udevice *dev)
	{
	struct cpu_platdata *plat = dev_get_parent_platdata(dev);

	plat->cpu_id = dev_read_u32_default(dev, "reg", -1);
	plat->device_id = read_c0_prid();

	return 0;
	}

	int bmips_cpu_probe(struct udevice *dev)
	{
	struct bmips_cpu_priv *priv = dev_get_priv(dev);
	const struct bmips_cpu_hw *hw =
	(const struct bmips_cpu_hw *)dev_get_driver_data(dev);

	priv->regs = dev_remap_addr(dev_get_parent(dev));
	if (!priv->regs)
	return -EINVAL;

	priv->hw = hw;

	return 0;
	}

	static const struct udevice_id bmips_cpu_ids[] = {
	{
	.compatible = "brcm,bcm3380-cpu",
	.data = (ulong)&bmips_cpu_bcm3380,
	}, {
	.compatible = "brcm,bcm6318-cpu",
	.data = (ulong)&bmips_cpu_bcm6318,
	}, {
	.compatible = "brcm,bcm6328-cpu",
	.data = (ulong)&bmips_cpu_bcm6328,
	}, {
	.compatible = "brcm,bcm6338-cpu",
	.data = (ulong)&bmips_cpu_bcm6338,
	}, {
	.compatible = "brcm,bcm6348-cpu",
	.data = (ulong)&bmips_cpu_bcm6348,
	}, {
	.compatible = "brcm,bcm6358-cpu",
	.data = (ulong)&bmips_cpu_bcm6358,
	}, {
	.compatible = "brcm,bcm6362-cpu",
	.data = (ulong)&bmips_cpu_bcm6362,
	}, {
	.compatible = "brcm,bcm6368-cpu",
	.data = (ulong)&bmips_cpu_bcm6368,
	}, {
	.compatible = "brcm,bcm63268-cpu",
	.data = (ulong)&bmips_cpu_bcm63268,
	}, {
	.compatible = "brcm,bcm6838-cpu",
	.data = (ulong)&bmips_cpu_bcm6838,
	},
	{ /* sentinel */ }
	};

	U_BOOT_DRIVER(bmips_cpu_drv) = {
	.name = "bmips_cpu",
	.id = UCLASS_CPU,
	.of_match = bmips_cpu_ids,
	.bind = bmips_cpu_bind,
	.probe = bmips_cpu_probe,
	.priv_auto_alloc_size = sizeof(struct bmips_cpu_priv),
	.ops = &bmips_cpu_ops,
	.flags = DM_FLAG_PRE_RELOC,
	};

	#ifdef CONFIG_DISPLAY_CPUINFO
	int print_cpuinfo(void)
	{
	struct cpu_info cpu;
	struct udevice *dev;
	int err;
	char desc[100];

	err = uclass_get_device(UCLASS_CPU, 0, &dev);
	if (err)
	return 0;

	err = cpu_get_info(dev, &cpu);
	if (err)
	return 0;

	err = cpu_get_desc(dev, desc, sizeof(desc));
	if (err)
	return 0;

	printf("Chip ID: %s, MIPS: ", desc);
	print_freq(cpu.cpu_freq, "\n");

	return 0;
	}
	#endif