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thermal: mediatek: Add tsensor support for V2 thermal system
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This patch adds full support for ver 2 thermal system (e.g., MT7622 SoC).
The new changes include reading calibration data, converting temperature
and hardware initialization which are specific for version 2 system.
Each platform decides which function to call according to its version.

Fixes: 3966be3 ("thermal: mediatek: add support for MT7622 SoC")
Signed-off-by: Henry Yen <henry.yen@mediatek.com>
Reviewed-by: Matthias Brugger <matthias.bgg@gmail.com>
Tested-By: Frank Wunderlich <frank-w@public-files.de>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Link: https://lore.kernel.org/r/1588238074-19338-3-git-send-email-henry.yen@mediatek.com
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Henry Yen authored and Daniel Lezcano committed Jul 31, 2020
1 parent 54bf1e5 commit 8994504
Showing 1 changed file with 125 additions and 7 deletions.
132 changes: 125 additions & 7 deletions drivers/thermal/mtk_thermal.c
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Original file line number Diff line number Diff line change
Expand Up @@ -38,6 +38,7 @@
#define TEMP_MONIDET0 0x014
#define TEMP_MONIDET1 0x018
#define TEMP_MSRCTL0 0x038
#define TEMP_MSRCTL1 0x03c
#define TEMP_AHBPOLL 0x040
#define TEMP_AHBTO 0x044
#define TEMP_ADCPNP0 0x048
Expand Down Expand Up @@ -133,6 +134,20 @@
#define CALIB_BUF0_O_SLOPE_SIGN_V1(x) (((x) >> 7) & 0x1)
#define CALIB_BUF1_ID_V1(x) (((x) >> 9) & 0x1)

/*
* Layout of the fuses providing the calibration data
* These macros could be used for MT7622.
*/
#define CALIB_BUF0_ADC_OE_V2(x) (((x) >> 22) & 0x3ff)
#define CALIB_BUF0_ADC_GE_V2(x) (((x) >> 12) & 0x3ff)
#define CALIB_BUF0_DEGC_CALI_V2(x) (((x) >> 6) & 0x3f)
#define CALIB_BUF0_O_SLOPE_V2(x) (((x) >> 0) & 0x3f)
#define CALIB_BUF1_VTS_TS1_V2(x) (((x) >> 23) & 0x1ff)
#define CALIB_BUF1_VTS_TS2_V2(x) (((x) >> 14) & 0x1ff)
#define CALIB_BUF1_VTS_TSABB_V2(x) (((x) >> 5) & 0x1ff)
#define CALIB_BUF1_VALID_V2(x) (((x) >> 4) & 0x1)
#define CALIB_BUF1_O_SLOPE_SIGN_V2(x) (((x) >> 3) & 0x1)

enum {
VTS1,
VTS2,
Expand All @@ -143,6 +158,11 @@ enum {
MAX_NUM_VTS,
};

enum mtk_thermal_version {
MTK_THERMAL_V1 = 1,
MTK_THERMAL_V2,
};

/* MT2701 thermal sensors */
#define MT2701_TS1 0
#define MT2701_TS2 1
Expand Down Expand Up @@ -245,6 +265,7 @@ struct mtk_thermal_data {
const int *controller_offset;
bool need_switch_bank;
struct thermal_bank_cfg bank_data[MAX_NUM_ZONES];
enum mtk_thermal_version version;
};

struct mtk_thermal {
Expand All @@ -258,8 +279,10 @@ struct mtk_thermal {

/* Calibration values */
s32 adc_ge;
s32 adc_oe;
s32 degc_cali;
s32 o_slope;
s32 o_slope_sign;
s32 vts[MAX_NUM_VTS];

const struct mtk_thermal_data *conf;
Expand Down Expand Up @@ -398,6 +421,7 @@ static const struct mtk_thermal_data mt8173_thermal_data = {
.msr = mt8173_msr,
.adcpnp = mt8173_adcpnp,
.sensor_mux_values = mt8173_mux_values,
.version = MTK_THERMAL_V1,
};

/*
Expand Down Expand Up @@ -428,6 +452,7 @@ static const struct mtk_thermal_data mt2701_thermal_data = {
.msr = mt2701_msr,
.adcpnp = mt2701_adcpnp,
.sensor_mux_values = mt2701_mux_values,
.version = MTK_THERMAL_V1,
};

/*
Expand Down Expand Up @@ -458,6 +483,7 @@ static const struct mtk_thermal_data mt2712_thermal_data = {
.msr = mt2712_msr,
.adcpnp = mt2712_adcpnp,
.sensor_mux_values = mt2712_mux_values,
.version = MTK_THERMAL_V1,
};

/*
Expand All @@ -482,6 +508,7 @@ static const struct mtk_thermal_data mt7622_thermal_data = {
.msr = mt7622_msr,
.adcpnp = mt7622_adcpnp,
.sensor_mux_values = mt7622_mux_values,
.version = MTK_THERMAL_V2,
};

/*
Expand Down Expand Up @@ -514,6 +541,7 @@ static const struct mtk_thermal_data mt8183_thermal_data = {
.msr = mt8183_msr,
.adcpnp = mt8183_adcpnp,
.sensor_mux_values = mt8183_mux_values,
.version = MTK_THERMAL_V1,
};

/**
Expand All @@ -540,6 +568,36 @@ static int raw_to_mcelsius_v1(struct mtk_thermal *mt, int sensno, s32 raw)
return mt->degc_cali * 500 - tmp;
}

static int raw_to_mcelsius_v2(struct mtk_thermal *mt, int sensno, s32 raw)
{
s32 format_1 = 0;
s32 format_2 = 0;
s32 g_oe = 1;
s32 g_gain = 1;
s32 g_x_roomt = 0;
s32 tmp = 0;

if (raw == 0)
return 0;

raw &= 0xfff;
g_gain = 10000 + (((mt->adc_ge - 512) * 10000) >> 12);
g_oe = mt->adc_oe - 512;
format_1 = mt->vts[VTS2] + 3105 - g_oe;
format_2 = (mt->degc_cali * 10) >> 1;
g_x_roomt = (((format_1 * 10000) >> 12) * 10000) / g_gain;

tmp = (((((raw - g_oe) * 10000) >> 12) * 10000) / g_gain) - g_x_roomt;
tmp = tmp * 10 * 100 / 11;

if (mt->o_slope_sign == 0)
tmp = tmp / (165 - mt->o_slope);
else
tmp = tmp / (165 + mt->o_slope);

return (format_2 - tmp) * 100;
}

/**
* mtk_thermal_get_bank - get bank
* @bank: The bank
Expand Down Expand Up @@ -594,9 +652,13 @@ static int mtk_thermal_bank_temperature(struct mtk_thermal_bank *bank)
raw = readl(mt->thermal_base +
conf->msr[conf->bank_data[bank->id].sensors[i]]);

temp = raw_to_mcelsius_v1(mt,
conf->bank_data[bank->id].sensors[i],
raw);
if (mt->conf->version == MTK_THERMAL_V1) {
temp = raw_to_mcelsius_v1(
mt, conf->bank_data[bank->id].sensors[i], raw);
} else {
temp = raw_to_mcelsius_v2(
mt, conf->bank_data[bank->id].sensors[i], raw);
}

/*
* The first read of a sensor often contains very high bogus
Expand Down Expand Up @@ -698,9 +760,11 @@ static void mtk_thermal_init_bank(struct mtk_thermal *mt, int num,
writel(auxadc_phys_base + AUXADC_CON1_CLR_V,
controller_base + TEMP_ADCMUXADDR);

/* AHB address for pnp sensor mux selection */
writel(apmixed_phys_base + APMIXED_SYS_TS_CON1,
controller_base + TEMP_PNPMUXADDR);
if (mt->conf->version == MTK_THERMAL_V1) {
/* AHB address for pnp sensor mux selection */
writel(apmixed_phys_base + APMIXED_SYS_TS_CON1,
controller_base + TEMP_PNPMUXADDR);
}

/* AHB value for auxadc enable */
writel(BIT(conf->auxadc_channel), controller_base + TEMP_ADCEN);
Expand Down Expand Up @@ -803,6 +867,23 @@ static int mtk_thermal_extract_efuse_v1(struct mtk_thermal *mt, u32 *buf)
return 0;
}

static int mtk_thermal_extract_efuse_v2(struct mtk_thermal *mt, u32 *buf)
{
if (!CALIB_BUF1_VALID_V2(buf[1]))
return -EINVAL;

mt->adc_oe = CALIB_BUF0_ADC_OE_V2(buf[0]);
mt->adc_ge = CALIB_BUF0_ADC_GE_V2(buf[0]);
mt->degc_cali = CALIB_BUF0_DEGC_CALI_V2(buf[0]);
mt->o_slope = CALIB_BUF0_O_SLOPE_V2(buf[0]);
mt->vts[VTS1] = CALIB_BUF1_VTS_TS1_V2(buf[1]);
mt->vts[VTS2] = CALIB_BUF1_VTS_TS2_V2(buf[1]);
mt->vts[VTSABB] = CALIB_BUF1_VTS_TSABB_V2(buf[1]);
mt->o_slope_sign = CALIB_BUF1_O_SLOPE_SIGN_V2(buf[1]);

return 0;
}

static int mtk_thermal_get_calibration_data(struct device *dev,
struct mtk_thermal *mt)
{
Expand Down Expand Up @@ -838,8 +919,15 @@ static int mtk_thermal_get_calibration_data(struct device *dev,
goto out;
}

if (mtk_thermal_extract_efuse_v1(mt, buf))
if (mt->conf->version == MTK_THERMAL_V1)
ret = mtk_thermal_extract_efuse_v1(mt, buf);
else
ret = mtk_thermal_extract_efuse_v2(mt, buf);

if (ret) {
dev_info(dev, "Device not calibrated, using default calibration values\n");
ret = 0;
}

out:
kfree(buf);
Expand Down Expand Up @@ -872,6 +960,28 @@ static const struct of_device_id mtk_thermal_of_match[] = {
};
MODULE_DEVICE_TABLE(of, mtk_thermal_of_match);

static void mtk_thermal_turn_on_buffer(void __iomem *apmixed_base)
{
int tmp;

tmp = readl(apmixed_base + APMIXED_SYS_TS_CON1);
tmp &= ~(0x37);
tmp |= 0x1;
writel(tmp, apmixed_base + APMIXED_SYS_TS_CON1);
udelay(200);
}

static void mtk_thermal_release_periodic_ts(struct mtk_thermal *mt,
void __iomem *auxadc_base)
{
int tmp;

writel(0x800, auxadc_base + AUXADC_CON1_SET_V);
writel(0x1, mt->thermal_base + TEMP_MONCTL0);
tmp = readl(mt->thermal_base + TEMP_MSRCTL1);
writel((tmp & (~0x10e)), mt->thermal_base + TEMP_MSRCTL1);
}

static int mtk_thermal_probe(struct platform_device *pdev)
{
int ret, i, ctrl_id;
Expand All @@ -880,6 +990,7 @@ static int mtk_thermal_probe(struct platform_device *pdev)
struct resource *res;
u64 auxadc_phys_base, apmixed_phys_base;
struct thermal_zone_device *tzdev;
void __iomem *apmixed_base, *auxadc_base;

mt = devm_kzalloc(&pdev->dev, sizeof(*mt), GFP_KERNEL);
if (!mt)
Expand Down Expand Up @@ -914,6 +1025,7 @@ static int mtk_thermal_probe(struct platform_device *pdev)
return -ENODEV;
}

auxadc_base = of_iomap(auxadc, 0);
auxadc_phys_base = of_get_phys_base(auxadc);

of_node_put(auxadc);
Expand All @@ -929,6 +1041,7 @@ static int mtk_thermal_probe(struct platform_device *pdev)
return -ENODEV;
}

apmixed_base = of_iomap(apmixedsys, 0);
apmixed_phys_base = of_get_phys_base(apmixedsys);

of_node_put(apmixedsys);
Expand All @@ -954,6 +1067,11 @@ static int mtk_thermal_probe(struct platform_device *pdev)
goto err_disable_clk_auxadc;
}

if (mt->conf->version == MTK_THERMAL_V2) {
mtk_thermal_turn_on_buffer(apmixed_base);
mtk_thermal_release_periodic_ts(mt, auxadc_base);
}

for (ctrl_id = 0; ctrl_id < mt->conf->num_controller ; ctrl_id++)
for (i = 0; i < mt->conf->num_banks; i++)
mtk_thermal_init_bank(mt, i, apmixed_phys_base,
Expand Down

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