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u-boot-brain/drivers/cpu/bmips_cpu.c
Tom Rini 83d290c56f SPDX: Convert all of our single license tags to Linux Kernel style 
When U-Boot started using SPDX tags we were among the early adopters and
there weren't a lot of other examples to borrow from.  So we picked the
area of the file that usually had a full license text and replaced it
with an appropriate SPDX-License-Identifier: entry.  Since then, the
Linux Kernel has adopted SPDX tags and they place it as the very first
line in a file (except where shebangs are used, then it's second line)
and with slightly different comment styles than us.

In part due to community overlap, in part due to better tag visibility
and in part for other minor reasons, switch over to that style.

This commit changes all instances where we have a single declared
license in the tag as both the before and after are identical in tag
contents.  There's also a few places where I found we did not have a tag
and have introduced one.

Signed-off-by: Tom Rini <trini@konsulko.com>
2018-05-07 09:34:12 -04:00

494 lines
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// 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>
DECLARE_GLOBAL_DATA_PTR;
#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)
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 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,
};
/* 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 = fdtdec_get_int(gd->fdt_blob, dev_of_offset(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);
fdt_addr_t addr;
fdt_size_t size;
addr = devfdt_get_addr_size_index(dev_get_parent(dev), 0, &size);
if (addr == FDT_ADDR_T_NONE)
return -EINVAL;
priv->regs = ioremap(addr, size);
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,
},
{ /* 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
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