u-boot/drivers/thermal/imx_tmu.c

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// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright 2017~2020 NXP
*
*/
#include <config.h>
#include <common.h>
#include <asm/global_data.h>
#include <asm/io.h>
#include <asm/arch/clock.h>
#include <asm/arch/sys_proto.h>
#include <dm.h>
#include <dm/device-internal.h>
#include <dm/device.h>
#include <errno.h>
#include <fuse.h>
#include <linux/delay.h>
#include <malloc.h>
#include <thermal.h>
DECLARE_GLOBAL_DATA_PTR;
#define SITES_MAX 16
#define FLAGS_VER2 0x1
#define FLAGS_VER3 0x2
#define TMR_DISABLE 0x0
#define TMR_ME 0x80000000
#define TMR_ALPF 0x0c000000
#define TMTMIR_DEFAULT 0x00000002
#define TIER_DISABLE 0x0
#define TER_EN 0x80000000
#define TER_ADC_PD 0x40000000
#define TER_ALPF 0x3
/*
* i.MX TMU Registers
*/
struct imx_tmu_site_regs {
u32 tritsr; /* Immediate Temperature Site Register */
u32 tratsr; /* Average Temperature Site Register */
u8 res0[0x8];
};
struct imx_tmu_regs {
u32 tmr; /* Mode Register */
u32 tsr; /* Status Register */
u32 tmtmir; /* Temperature measurement interval Register */
u8 res0[0x14];
u32 tier; /* Interrupt Enable Register */
u32 tidr; /* Interrupt Detect Register */
u32 tiscr; /* Interrupt Site Capture Register */
u32 ticscr; /* Interrupt Critical Site Capture Register */
u8 res1[0x10];
u32 tmhtcrh; /* High Temperature Capture Register */
u32 tmhtcrl; /* Low Temperature Capture Register */
u8 res2[0x8];
u32 tmhtitr; /* High Temperature Immediate Threshold */
u32 tmhtatr; /* High Temperature Average Threshold */
u32 tmhtactr; /* High Temperature Average Crit Threshold */
u8 res3[0x24];
u32 ttcfgr; /* Temperature Configuration Register */
u32 tscfgr; /* Sensor Configuration Register */
u8 res4[0x78];
struct imx_tmu_site_regs site[SITES_MAX];
u8 res5[0x9f8];
u32 ipbrr0; /* IP Block Revision Register 0 */
u32 ipbrr1; /* IP Block Revision Register 1 */
u8 res6[0x310];
u32 ttr0cr; /* Temperature Range 0 Control Register */
u32 ttr1cr; /* Temperature Range 1 Control Register */
u32 ttr2cr; /* Temperature Range 2 Control Register */
u32 ttr3cr; /* Temperature Range 3 Control Register */
};
struct imx_tmu_regs_v2 {
u32 ter; /* TMU enable Register */
u32 tsr; /* Status Register */
u32 tier; /* Interrupt enable register */
u32 tidr; /* Interrupt detect register */
u32 tmhtitr; /* Monitor high temperature immediate threshold register */
u32 tmhtatr; /* Monitor high temperature average threshold register */
u32 tmhtactr; /* TMU monitor high temperature average critical threshold register */
u32 tscr; /* Sensor value capture register */
u32 tritsr; /* Report immediate temperature site register 0 */
u32 tratsr; /* Report average temperature site register 0 */
u32 tasr; /* Amplifier setting register */
u32 ttmc; /* Test MUX control */
u32 tcaliv;
};
struct imx_tmu_regs_v3 {
u32 ter; /* TMU enable Register */
u32 tps; /* Status Register */
u32 tier; /* Interrupt enable register */
u32 tidr; /* Interrupt detect register */
u32 tmhtitr; /* Monitor high temperature immediate threshold register */
u32 tmhtatr; /* Monitor high temperature average threshold register */
u32 tmhtactr; /* TMU monitor high temperature average critical threshold register */
u32 tscr; /* Sensor value capture register */
u32 tritsr; /* Report immediate temperature site register 0 */
u32 tratsr; /* Report average temperature site register 0 */
u32 tasr; /* Amplifier setting register */
u32 ttmc; /* Test MUX control */
u32 tcaliv0;
u32 tcaliv1;
u32 tcaliv_m40;
u32 trim;
};
union tmu_regs {
struct imx_tmu_regs regs_v1;
struct imx_tmu_regs_v2 regs_v2;
struct imx_tmu_regs_v3 regs_v3;
};
struct imx_tmu_plat {
int critical;
int alert;
int polling_delay;
int id;
bool zone_node;
union tmu_regs *regs;
};
static int read_temperature(struct udevice *dev, int *temp)
{
struct imx_tmu_plat *pdata = dev_get_plat(dev);
ulong drv_data = dev_get_driver_data(dev);
u32 val;
u32 retry = 10;
u32 valid = 0;
do {
mdelay(100);
retry--;
if (drv_data & FLAGS_VER3) {
val = readl(&pdata->regs->regs_v3.tritsr);
valid = val & (1 << (30 + pdata->id));
} else if (drv_data & FLAGS_VER2) {
val = readl(&pdata->regs->regs_v2.tritsr);
/*
* Check if TEMP is in valid range, the V bit in TRITSR
* only reflects the RAW uncalibrated data
*/
valid = ((val & 0xff) < 10 || (val & 0xff) > 125) ? 0 : 1;
} else {
val = readl(&pdata->regs->regs_v1.site[pdata->id].tritsr);
valid = val & 0x80000000;
}
} while (!valid && retry > 0);
if (retry > 0) {
if (drv_data & FLAGS_VER3) {
val = (val >> (pdata->id * 16)) & 0xff;
if (val & 0x80) /* Negative */
val = (~(val & 0x7f) + 1);
*temp = val;
if (*temp < -40 || *temp > 125) /* Check the range */
return -EINVAL;
*temp *= 1000;
} else {
*temp = (val & 0xff) * 1000;
}
} else {
return -EINVAL;
}
return 0;
}
int imx_tmu_get_temp(struct udevice *dev, int *temp)
{
struct imx_tmu_plat *pdata = dev_get_plat(dev);
int cpu_tmp = 0;
int ret;
ret = read_temperature(dev, &cpu_tmp);
if (ret)
return ret;
while (cpu_tmp >= pdata->alert) {
printf("CPU Temperature (%dC) has beyond alert (%dC), close to critical (%dC)", cpu_tmp, pdata->alert, pdata->critical);
puts(" waiting...\n");
mdelay(pdata->polling_delay);
ret = read_temperature(dev, &cpu_tmp);
if (ret)
return ret;
}
*temp = cpu_tmp / 1000;
return 0;
}
static const struct dm_thermal_ops imx_tmu_ops = {
.get_temp = imx_tmu_get_temp,
};
static int imx_tmu_calibration(struct udevice *dev)
{
int i, val, len, ret;
u32 range[4];
const fdt32_t *calibration;
struct imx_tmu_plat *pdata = dev_get_plat(dev);
ulong drv_data = dev_get_driver_data(dev);
debug("%s\n", __func__);
if (drv_data & (FLAGS_VER2 | FLAGS_VER3))
return 0;
ret = dev_read_u32_array(dev, "fsl,tmu-range", range, 4);
if (ret) {
printf("TMU: missing calibration range, ret = %d.\n", ret);
return ret;
}
/* Init temperature range registers */
writel(range[0], &pdata->regs->regs_v1.ttr0cr);
writel(range[1], &pdata->regs->regs_v1.ttr1cr);
writel(range[2], &pdata->regs->regs_v1.ttr2cr);
writel(range[3], &pdata->regs->regs_v1.ttr3cr);
calibration = dev_read_prop(dev, "fsl,tmu-calibration", &len);
if (!calibration || len % 8) {
printf("TMU: invalid calibration data.\n");
return -ENODEV;
}
for (i = 0; i < len; i += 8, calibration += 2) {
val = fdt32_to_cpu(*calibration);
writel(val, &pdata->regs->regs_v1.ttcfgr);
val = fdt32_to_cpu(*(calibration + 1));
writel(val, &pdata->regs->regs_v1.tscfgr);
}
return 0;
}
void __weak imx_tmu_arch_init(void *reg_base)
{
}
static void imx_tmu_init(struct udevice *dev)
{
struct imx_tmu_plat *pdata = dev_get_plat(dev);
ulong drv_data = dev_get_driver_data(dev);
debug("%s\n", __func__);
if (drv_data & FLAGS_VER3) {
/* Disable monitoring */
writel(0x0, &pdata->regs->regs_v3.ter);
/* Disable interrupt, using polling instead */
writel(0x0, &pdata->regs->regs_v3.tier);
} else if (drv_data & FLAGS_VER2) {
/* Disable monitoring */
writel(0x0, &pdata->regs->regs_v2.ter);
/* Disable interrupt, using polling instead */
writel(0x0, &pdata->regs->regs_v2.tier);
} else {
/* Disable monitoring */
writel(TMR_DISABLE, &pdata->regs->regs_v1.tmr);
/* Disable interrupt, using polling instead */
writel(TIER_DISABLE, &pdata->regs->regs_v1.tier);
/* Set update_interval */
writel(TMTMIR_DEFAULT, &pdata->regs->regs_v1.tmtmir);
}
imx_tmu_arch_init((void *)pdata->regs);
}
static int imx_tmu_enable_msite(struct udevice *dev)
{
struct imx_tmu_plat *pdata = dev_get_plat(dev);
ulong drv_data = dev_get_driver_data(dev);
u32 reg;
debug("%s\n", __func__);
if (!pdata->regs)
return -EIO;
if (drv_data & FLAGS_VER3) {
reg = readl(&pdata->regs->regs_v3.ter);
reg &= ~TER_EN;
writel(reg, &pdata->regs->regs_v3.ter);
writel(pdata->id << 30, &pdata->regs->regs_v3.tps);
reg &= ~TER_ALPF;
reg |= 0x1;
reg &= ~TER_ADC_PD;
writel(reg, &pdata->regs->regs_v3.ter);
/* Enable monitor */
reg |= TER_EN;
writel(reg, &pdata->regs->regs_v3.ter);
} else if (drv_data & FLAGS_VER2) {
reg = readl(&pdata->regs->regs_v2.ter);
reg &= ~TER_EN;
writel(reg, &pdata->regs->regs_v2.ter);
reg &= ~TER_ALPF;
reg |= 0x1;
writel(reg, &pdata->regs->regs_v2.ter);
/* Enable monitor */
reg |= TER_EN;
writel(reg, &pdata->regs->regs_v2.ter);
} else {
/* Clear the ME before setting MSITE and ALPF*/
reg = readl(&pdata->regs->regs_v1.tmr);
reg &= ~TMR_ME;
writel(reg, &pdata->regs->regs_v1.tmr);
reg |= 1 << (15 - pdata->id);
reg |= TMR_ALPF;
writel(reg, &pdata->regs->regs_v1.tmr);
/* Enable ME */
reg |= TMR_ME;
writel(reg, &pdata->regs->regs_v1.tmr);
}
return 0;
}
static int imx_tmu_bind(struct udevice *dev)
{
struct imx_tmu_plat *pdata = dev_get_plat(dev);
int ret;
ofnode node, offset;
const char *name;
const void *prop;
int minc, maxc;
debug("%s dev name %s\n", __func__, dev->name);
prop = dev_read_prop(dev, "compatible", NULL);
if (!prop)
return 0;
pdata->zone_node = 1;
/* default alert/crit temps based on temp grade */
get_cpu_temp_grade(&minc, &maxc);
pdata->critical = maxc * 1000;
pdata->alert = (maxc - 10) * 1000;
node = ofnode_path("/thermal-zones");
ofnode_for_each_subnode(offset, node) {
/* Bind the subnode to this driver */
name = ofnode_get_name(offset);
ret = device_bind_with_driver_data(dev, dev->driver, name,
dev->driver_data, offset,
NULL);
if (ret)
printf("Error binding driver '%s': %d\n",
dev->driver->name, ret);
}
return 0;
}
static int imx_tmu_parse_fdt(struct udevice *dev)
{
struct imx_tmu_plat *pdata = dev_get_plat(dev), *p_parent_data;
struct ofnode_phandle_args args;
ofnode trips_np;
int ret;
debug("%s dev name %s\n", __func__, dev->name);
if (pdata->zone_node) {
pdata->regs = (union tmu_regs *)dev_read_addr_ptr(dev);
if (!pdata->regs)
return -EINVAL;
return 0;
}
p_parent_data = dev_get_plat(dev->parent);
if (p_parent_data->zone_node)
pdata->regs = p_parent_data->regs;
ret = dev_read_phandle_with_args(dev, "thermal-sensors",
"#thermal-sensor-cells",
0, 0, &args);
if (ret)
return ret;
if (!ofnode_equal(args.node, dev_ofnode(dev->parent)))
return -EFAULT;
if (args.args_count >= 1)
pdata->id = args.args[0];
else
pdata->id = 0;
debug("args.args_count %d, id %d\n", args.args_count, pdata->id);
pdata->polling_delay = dev_read_u32_default(dev, "polling-delay", 1000);
trips_np = ofnode_path("/thermal-zones/cpu-thermal/trips");
ofnode_for_each_subnode(trips_np, trips_np) {
const char *type;
type = ofnode_get_property(trips_np, "type", NULL);
if (!type)
continue;
if (!strcmp(type, "critical"))
pdata->critical = ofnode_read_u32_default(trips_np, "temperature", 85);
else if (strcmp(type, "passive") == 0)
pdata->alert = ofnode_read_u32_default(trips_np, "temperature", 80);
else
continue;
}
debug("id %d polling_delay %d, critical %d, alert %d\n",
pdata->id, pdata->polling_delay, pdata->critical, pdata->alert);
return 0;
}
static int imx_tmu_probe(struct udevice *dev)
{
struct imx_tmu_plat *pdata = dev_get_plat(dev);
int ret;
ret = imx_tmu_parse_fdt(dev);
if (ret) {
printf("Error in parsing TMU FDT %d\n", ret);
return ret;
}
if (pdata->zone_node) {
imx_tmu_init(dev);
imx_tmu_calibration(dev);
imx_tmu_enable_msite(dev);
} else {
imx_tmu_enable_msite(dev);
}
return 0;
}
static const struct udevice_id imx_tmu_ids[] = {
{ .compatible = "fsl,imx8mq-tmu", },
{ .compatible = "fsl,imx8mm-tmu", .data = FLAGS_VER2, },
{ .compatible = "fsl,imx8mp-tmu", .data = FLAGS_VER3, },
{ }
};
U_BOOT_DRIVER(imx_tmu) = {
.name = "imx_tmu",
.id = UCLASS_THERMAL,
.ops = &imx_tmu_ops,
.of_match = imx_tmu_ids,
.bind = imx_tmu_bind,
.probe = imx_tmu_probe,
.plat_auto = sizeof(struct imx_tmu_plat),
.flags = DM_FLAG_PRE_RELOC,
};