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// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright 2019 NXP
*/
#include <common.h>
#include <cpu.h>
#include <dm.h>
#include <thermal.h>
#include <asm/global_data.h>
#include <asm/system.h>
#include <asm/arch/sci/sci.h>
#include <asm/arch/sys_proto.h>
#include <asm/arch-imx/cpu.h>
#include <asm/armv8/cpu.h>
#include <linux/bitops.h>
DECLARE_GLOBAL_DATA_PTR;
struct cpu_imx_plat {
const char *name;
const char *rev;
const char *type;
u32 cpu_rsrc;
u32 cpurev;
u32 freq_mhz;
u32 mpidr;
};
const char *get_imx8_type(u32 imxtype)
{
switch (imxtype) {
case MXC_CPU_IMX8QXP:
case MXC_CPU_IMX8QXP_A0:
return "QXP";
case MXC_CPU_IMX8QM:
return "QM";
default:
return "??";
}
}
const char *get_imx8_rev(u32 rev)
{
switch (rev) {
case CHIP_REV_A:
return "A";
case CHIP_REV_B:
return "B";
case CHIP_REV_C:
return "C";
default:
return "?";
}
}
static void set_core_data(struct udevice *dev)
{
struct cpu_imx_plat *plat = dev_get_plat(dev);
if (device_is_compatible(dev, "arm,cortex-a35")) {
plat->cpu_rsrc = SC_R_A35;
plat->name = "A35";
} else if (device_is_compatible(dev, "arm,cortex-a53")) {
plat->cpu_rsrc = SC_R_A53;
plat->name = "A53";
} else if (device_is_compatible(dev, "arm,cortex-a72")) {
plat->cpu_rsrc = SC_R_A72;
plat->name = "A72";
} else {
plat->cpu_rsrc = SC_R_A53;
plat->name = "?";
}
}
#if IS_ENABLED(CONFIG_IMX_SCU_THERMAL)
static int cpu_imx_get_temp(struct cpu_imx_plat *plat)
{
struct udevice *thermal_dev;
int cpu_tmp, ret;
int idx = 1; /* use "cpu-thermal0" device */
if (plat->cpu_rsrc == SC_R_A72)
idx = 2; /* use "cpu-thermal1" device */
ret = uclass_get_device(UCLASS_THERMAL, idx, &thermal_dev);
if (!ret) {
ret = thermal_get_temp(thermal_dev, &cpu_tmp);
if (ret)
return 0xdeadbeef;
} else {
return 0xdeadbeef;
}
return cpu_tmp;
}
#else
static int cpu_imx_get_temp(struct cpu_imx_plat *plat)
{
return 0;
}
#endif
int cpu_imx_get_desc(const struct udevice *dev, char *buf, int size)
{
struct cpu_imx_plat *plat = dev_get_plat(dev);
int ret, temp;
if (size < 100)
return -ENOSPC;
ret = snprintf(buf, size, "NXP i.MX8%s Rev%s %s at %u MHz",
plat->type, plat->rev, plat->name, plat->freq_mhz);
if (IS_ENABLED(CONFIG_IMX_SCU_THERMAL)) {
temp = cpu_imx_get_temp(plat);
buf = buf + ret;
size = size - ret;
if (temp != 0xdeadbeef)
ret = snprintf(buf, size, " at %dC", temp);
else
ret = snprintf(buf, size, " - invalid sensor data");
}
snprintf(buf + ret, size - ret, "\n");
return 0;
}
static int cpu_imx_get_info(const struct udevice *dev, struct cpu_info *info)
{
struct cpu_imx_plat *plat = dev_get_plat(dev);
info->cpu_freq = plat->freq_mhz * 1000;
info->features = BIT(CPU_FEAT_L1_CACHE) | BIT(CPU_FEAT_MMU);
return 0;
}
static int cpu_imx_get_count(const struct udevice *dev)
{
ofnode node;
int num = 0;
ofnode_for_each_subnode(node, dev_ofnode(dev->parent)) {
const char *device_type;
if (!ofnode_is_enabled(node))
continue;
device_type = ofnode_read_string(node, "device_type");
if (!device_type)
continue;
if (!strcmp(device_type, "cpu"))
num++;
}
return num;
}
static int cpu_imx_get_vendor(const struct udevice *dev, char *buf, int size)
{
snprintf(buf, size, "NXP");
return 0;
}
static int cpu_imx_is_current(struct udevice *dev)
{
struct cpu_imx_plat *plat = dev_get_plat(dev);
if (plat->mpidr == (read_mpidr() & 0xffff))
return 1;
return 0;
}
static const struct cpu_ops cpu_imx8_ops = {
.get_desc = cpu_imx_get_desc,
.get_info = cpu_imx_get_info,
.get_count = cpu_imx_get_count,
.get_vendor = cpu_imx_get_vendor,
.is_current = cpu_imx_is_current,
};
static const struct udevice_id cpu_imx8_ids[] = {
{ .compatible = "arm,cortex-a35" },
{ .compatible = "arm,cortex-a53" },
{ .compatible = "arm,cortex-a72" },
{ }
};
static ulong imx8_get_cpu_rate(struct udevice *dev)
{
struct cpu_imx_plat *plat = dev_get_plat(dev);
ulong rate;
int ret;
ret = sc_pm_get_clock_rate(-1, plat->cpu_rsrc, SC_PM_CLK_CPU,
(sc_pm_clock_rate_t *)&rate);
if (ret) {
printf("Could not read CPU frequency: %d\n", ret);
return 0;
}
return rate;
}
static int imx8_cpu_probe(struct udevice *dev)
{
struct cpu_imx_plat *plat = dev_get_plat(dev);
u32 cpurev;
set_core_data(dev);
cpurev = get_cpu_rev();
plat->cpurev = cpurev;
plat->rev = get_imx8_rev(cpurev & 0xFFF);
plat->type = get_imx8_type((cpurev & 0xFF000) >> 12);
plat->freq_mhz = imx8_get_cpu_rate(dev) / 1000000;
plat->mpidr = dev_read_addr(dev);
if (plat->mpidr == FDT_ADDR_T_NONE) {
printf("%s: Failed to get CPU reg property\n", __func__);
return -EINVAL;
}
return 0;
}
U_BOOT_DRIVER(cpu_imx8_drv) = {
.name = "imx8x_cpu",
.id = UCLASS_CPU,
.of_match = cpu_imx8_ids,
.ops = &cpu_imx8_ops,
.probe = imx8_cpu_probe,
.plat_auto = sizeof(struct cpu_imx_plat),
.flags = DM_FLAG_PRE_RELOC,
};
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