/* $NetBSD: meson_thermal.c,v 1.6 2021/01/27 03:10:18 thorpej Exp $ */
/*
* Copyright (c) 2021 Ryo Shimizu <ryo@nerv.org>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
* OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: meson_thermal.c,v 1.6 2021/01/27 03:10:18 thorpej Exp $");
#include <sys/param.h>
#include <sys/types.h>
#include <sys/bus.h>
#include <sys/device.h>
#include <dev/fdt/fdtvar.h>
#include <dev/sysmon/sysmonvar.h>
#define TS_CFG_REG1 0x01
#define TS_CFG_REG1_ANA_EN_VCM __BIT(10)
#define TS_CFG_REG1_ANA_EN_VBG __BIT(9)
#define TS_CFG_REG1_FILTER_EN __BIT(5)
#define TS_CFG_REG1_DEM_EN __BIT(3)
#define TS_CFG_REG1_ANA_CH_SEL __BITS(2,0)
#define TS_CFG_REG2 0x02
#define TS_CFG_REG3 0x03
#define TS_CFG_REG4 0x04
#define TS_CFG_REG5 0x05
#define TS_CFG_REG6 0x06
#define TS_CFG_REG7 0x07
#define TS_STAT0_REG 0x10
#define TS_STAT0_FILTER_OUT __BITS(15,0)
#define TS_STAT1_REG 0x11
#define TS_STAT2_REG 0x12
#define TS_STAT3_REG 0x13
#define TS_STAT4_REG 0x14
#define TS_STAT5_REG 0x15
#define TS_STAT6_REG 0x16
#define TS_STAT7_REG 0x17
#define TS_STAT8_REG 0x18
#define TS_STAT9_REG 0x19
#define THERMAL_READ_REG(sc, reg) \
bus_space_read_4((sc)->sc_bst, (sc)->sc_bsh, (reg) * 4)
#define THERMAL_WRITE_REG(sc, reg, val) \
bus_space_write_4((sc)->sc_bst, (sc)->sc_bsh, (reg) * 4, (val))
#define AOSECURE_READ(sc, reg) \
bus_space_read_4((sc)->sc_bst, (sc)->sc_bsh_ao, (reg))
#define AOSECURE_WRITE(sc, reg, val) \
bus_space_write_4((sc)->sc_bst, (sc)->sc_bsh_ao, (reg), (val))
struct meson_thermal_config {
const char *name;
bus_size_t aosec_reg;
};
static struct meson_thermal_config thermal_cpu_conf = {
.name = "CPU",
.aosec_reg = 0x128
};
static struct meson_thermal_config thermal_ddr_conf = {
.name = "DDR",
.aosec_reg = 0xf0
};
static const struct device_compatible_entry compat_data[] = {
{ .compat = "amlogic,g12a-cpu-thermal", .data = &thermal_cpu_conf },
{ .compat = "amlogic,g12a-ddr-thermal", .data = &thermal_ddr_conf },
DEVICE_COMPAT_EOL
};
struct meson_thermal_softc {
device_t sc_dev;
bus_space_tag_t sc_bst;
bus_space_handle_t sc_bsh;
bus_space_handle_t sc_bsh_ao;
const struct meson_thermal_config *sc_conf;
int sc_phandle;
int sc_ao_calib;
struct sysmon_envsys *sc_sme;
envsys_data_t sc_sensor_temp;
};
static void
meson_thermal_init(struct meson_thermal_softc *sc)
{
uint32_t val;
val = THERMAL_READ_REG(sc, TS_CFG_REG1);
val |= TS_CFG_REG1_ANA_EN_VCM;
val |= TS_CFG_REG1_ANA_EN_VBG;
val |= TS_CFG_REG1_FILTER_EN;
val |= TS_CFG_REG1_DEM_EN;
val &= ~TS_CFG_REG1_ANA_CH_SEL;
val |= __SHIFTIN(3, TS_CFG_REG1_ANA_CH_SEL);
THERMAL_WRITE_REG(sc, TS_CFG_REG1, val);
/* read calibration value in ao-secure */
#define TS_AO_CALIB_VERSION_MASK __BITS(31,24)
#define TS_AO_CALIB_SIGN_MASK __BIT(15)
#define TS_AO_CALIB_TEMP_MASK __BITS(14,0)
val = AOSECURE_READ(sc, sc->sc_conf->aosec_reg);
if ((val & TS_AO_CALIB_VERSION_MASK) != 0) {
sc->sc_ao_calib = (val & TS_AO_CALIB_TEMP_MASK);
if ((val & TS_AO_CALIB_SIGN_MASK) != 0)
sc->sc_ao_calib *= -1;
} else {
sc->sc_ao_calib = 0;
}
}
static int
meson_get_temperature(struct meson_thermal_softc *sc)
{
int val, temp;
int64_t factor, uptat;
val = THERMAL_READ_REG(sc, TS_STAT0_REG) & TS_STAT0_FILTER_OUT;
#define CALIB_A 9411
#define CALIB_B 3159
#define CALIB_m_1024 4342 /* 4.24 */
#define CALIB_n_1024 3318 /* 3.24 */
factor = (val * CALIB_n_1024) / 1024;
uptat = (val * CALIB_m_1024) / 1024;
uptat = (uptat * (1 << 16)) / ((1 << 16) + factor);
temp = ((uptat + sc->sc_ao_calib) * CALIB_A);
temp = (temp - (CALIB_B * (1 << 16))) * 100000LL / (1 << 16);
return temp; /* microcelsius */
}
static void
meson_thermal_refresh(struct sysmon_envsys *sme, envsys_data_t *edata)
{
struct meson_thermal_softc *sc = sme->sme_cookie;
edata->value_cur = meson_get_temperature(sc) + 273150000;
edata->state = ENVSYS_SVALID;
}
static int
meson_thermal_match(device_t parent, cfdata_t cf, void *aux)
{
struct fdt_attach_args * const faa = aux;
return of_compatible_match(faa->faa_phandle, compat_data);
}
static void
meson_thermal_attach(device_t parent, device_t self, void *aux)
{
struct meson_thermal_softc * const sc = device_private(self);
struct fdt_attach_args * const faa = aux;
bus_addr_t addr;
bus_size_t size, aosize;
int phandle, phandle_aosec;
sc->sc_dev = self;
sc->sc_bst = faa->faa_bst;
sc->sc_phandle = phandle = faa->faa_phandle;
sc->sc_conf = of_compatible_lookup(phandle, compat_data)->data;
if (fdtbus_get_reg(phandle, 0, &addr, &size) != 0) {
aprint_error(": couldn't get registers\n");
goto attach_failure0;
}
if (bus_space_map(sc->sc_bst, addr, size, 0, &sc->sc_bsh) != 0) {
aprint_error(": couldn't map registers\n");
goto attach_failure0;
}
phandle_aosec = fdtbus_get_phandle(phandle, "amlogic,ao-secure");
if (fdtbus_get_reg(phandle_aosec, 0, &addr, &aosize) != 0) {
aprint_error(": couldn't get registers\n");
goto attach_failure1;
}
if (bus_space_map(sc->sc_bst, addr, aosize, 0, &sc->sc_bsh_ao) != 0) {
aprint_error(": couldn't map registers\n");
goto attach_failure1;
}
if (fdtbus_clock_enable_index(phandle, 0, true) != 0) {
aprint_error(": couldn't enable clock\n");
goto attach_failure2;
}
meson_thermal_init(sc);
aprint_naive("\n");
aprint_normal(": %s TEMP Sensor\n", sc->sc_conf->name);
sc->sc_sme = sysmon_envsys_create();
sc->sc_sme->sme_name = device_xname(self);
sc->sc_sme->sme_cookie = sc;
sc->sc_sme->sme_flags = 0;
sc->sc_sme->sme_events_timeout = 1;
sc->sc_sme->sme_refresh = meson_thermal_refresh;
sc->sc_sensor_temp.units = ENVSYS_STEMP;
sc->sc_sensor_temp.state = ENVSYS_SINVALID;
snprintf(sc->sc_sensor_temp.desc, ENVSYS_DESCLEN,
"%s", sc->sc_conf->name);
sysmon_envsys_sensor_attach(sc->sc_sme, &sc->sc_sensor_temp);
sysmon_envsys_register(sc->sc_sme);
meson_thermal_refresh(sc->sc_sme, &sc->sc_sensor_temp);
return;
attach_failure2:
bus_space_unmap(sc->sc_bst, sc->sc_bsh_ao, aosize);
attach_failure1:
bus_space_unmap(sc->sc_bst, sc->sc_bsh, size);
attach_failure0:
return;
}
CFATTACH_DECL_NEW(meson_thermal, sizeof(struct meson_thermal_softc),
meson_thermal_match, meson_thermal_attach, NULL, NULL);