Add submodule dependency filesHEADmaster

Change-Id: Iaf8d18082d3991dec7c0ebbea540f092188eb4ec

1 files changed, 279 insertions, 0 deletions

diff --git a/roms/u-boot/drivers/thermal/imx_thermal.c b/roms/u-boot/drivers/thermal/imx_thermal.c
new file mode 100644
index 000000000..2f6343e7a
--- /dev/null
+++ b/roms/u-boot/drivers/thermal/imx_thermal.c
@@ -0,0 +1,279 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * (C) Copyright 2014 Freescale Semiconductor, Inc.
+ * Author: Nitin Garg <nitin.garg@freescale.com>
+ *             Ye Li <Ye.Li@freescale.com>
+ */
+
+#include <config.h>
+#include <common.h>
+#include <div64.h>
+#include <fuse.h>
+#include <log.h>
+#include <asm/io.h>
+#include <asm/arch/clock.h>
+#include <asm/arch/sys_proto.h>
+#include <dm.h>
+#include <errno.h>
+#include <malloc.h>
+#include <linux/delay.h>
+#include <linux/math64.h>
+#include <thermal.h>
+#include <imx_thermal.h>
+
+/* board will busyloop until this many degrees C below CPU max temperature */
+#define TEMPERATURE_HOT_DELTA   5 /* CPU maxT - 5C */
+#define FACTOR0			10000000
+#define FACTOR1			15423
+#define FACTOR2			4148468
+#define OFFSET			3580661
+#define MEASURE_FREQ		327
+#define TEMPERATURE_MIN         -40
+#define TEMPERATURE_HOT         85
+#define TEMPERATURE_MAX         125
+
+#define TEMPSENSE0_TEMP_CNT_SHIFT	8
+#define TEMPSENSE0_TEMP_CNT_MASK	(0xfff << TEMPSENSE0_TEMP_CNT_SHIFT)
+#define TEMPSENSE0_FINISHED		(1 << 2)
+#define TEMPSENSE0_MEASURE_TEMP		(1 << 1)
+#define TEMPSENSE0_POWER_DOWN		(1 << 0)
+#define MISC0_REFTOP_SELBIASOFF		(1 << 3)
+#define TEMPSENSE1_MEASURE_FREQ		0xffff
+
+struct thermal_data {
+	unsigned int fuse;
+	int critical;
+	int minc;
+	int maxc;
+};
+
+#if defined(CONFIG_MX6)
+static int read_cpu_temperature(struct udevice *dev)
+{
+	int temperature;
+	unsigned int reg, n_meas;
+	const struct imx_thermal_plat *pdata = dev_get_plat(dev);
+	struct anatop_regs *anatop = (struct anatop_regs *)pdata->regs;
+	struct thermal_data *priv = dev_get_priv(dev);
+	u32 fuse = priv->fuse;
+	int t1, n1;
+	s64 c1, c2;
+	s64 temp64;
+	s32 rem;
+
+	/*
+	 * Sensor data layout:
+	 *   [31:20] - sensor value @ 25C
+	 * We use universal formula now and only need sensor value @ 25C
+	 * slope = 0.4445388 - (0.0016549 * 25C fuse)
+	 */
+	n1 = fuse >> 20;
+	t1 = 25; /* t1 always 25C */
+
+	/*
+	 * Derived from linear interpolation:
+	 * slope = 0.4445388 - (0.0016549 * 25C fuse)
+	 * slope = (FACTOR2 - FACTOR1 * n1) / FACTOR0
+	 * offset = 3.580661
+	 * offset = OFFSET / 1000000
+	 * (Nmeas - n1) / (Tmeas - t1 - offset) = slope
+	 * We want to reduce this down to the minimum computation necessary
+	 * for each temperature read.  Also, we want Tmeas in millicelsius
+	 * and we don't want to lose precision from integer division. So...
+	 * Tmeas = (Nmeas - n1) / slope + t1 + offset
+	 * milli_Tmeas = 1000000 * (Nmeas - n1) / slope + 1000000 * t1 + OFFSET
+	 * milli_Tmeas = -1000000 * (n1 - Nmeas) / slope + 1000000 * t1 + OFFSET
+	 * Let constant c1 = (-1000000 / slope)
+	 * milli_Tmeas = (n1 - Nmeas) * c1 + 1000000 * t1 + OFFSET
+	 * Let constant c2 = n1 *c1 + 1000000 * t1
+	 * milli_Tmeas = (c2 - Nmeas * c1) + OFFSET
+	 * Tmeas = ((c2 - Nmeas * c1) + OFFSET) / 1000000
+	 */
+	temp64 = FACTOR0;
+	temp64 *= 1000000;
+	temp64 = div_s64_rem(temp64, FACTOR1 * n1 - FACTOR2, &rem);
+	c1 = temp64;
+	c2 = n1 * c1 + 1000000 * t1;
+
+	/*
+	 * now we only use single measure, every time we read
+	 * the temperature, we will power on/down anadig thermal
+	 * module
+	 */
+	writel(TEMPSENSE0_POWER_DOWN, &anatop->tempsense0_clr);
+	writel(MISC0_REFTOP_SELBIASOFF, &anatop->ana_misc0_set);
+
+	/* setup measure freq */
+	reg = readl(&anatop->tempsense1);
+	reg &= ~TEMPSENSE1_MEASURE_FREQ;
+	reg |= MEASURE_FREQ;
+	writel(reg, &anatop->tempsense1);
+
+	/* start the measurement process */
+	writel(TEMPSENSE0_MEASURE_TEMP, &anatop->tempsense0_clr);
+	writel(TEMPSENSE0_FINISHED, &anatop->tempsense0_clr);
+	writel(TEMPSENSE0_MEASURE_TEMP, &anatop->tempsense0_set);
+
+	/* make sure that the latest temp is valid */
+	while ((readl(&anatop->tempsense0) &
+		TEMPSENSE0_FINISHED) == 0)
+		udelay(10000);
+
+	/* read temperature count */
+	reg = readl(&anatop->tempsense0);
+	n_meas = (reg & TEMPSENSE0_TEMP_CNT_MASK)
+		>> TEMPSENSE0_TEMP_CNT_SHIFT;
+	writel(TEMPSENSE0_FINISHED, &anatop->tempsense0_clr);
+
+	/* Tmeas = (c2 - Nmeas * c1 + OFFSET) / 1000000 */
+	temperature = div_s64_rem(c2 - n_meas * c1 + OFFSET, 1000000, &rem);
+
+	/* power down anatop thermal sensor */
+	writel(TEMPSENSE0_POWER_DOWN, &anatop->tempsense0_set);
+	writel(MISC0_REFTOP_SELBIASOFF, &anatop->ana_misc0_clr);
+
+	return temperature;
+}
+#elif defined(CONFIG_MX7)
+static int read_cpu_temperature(struct udevice *dev)
+{
+	unsigned int reg, tmp;
+	unsigned int raw_25c, te1;
+	int temperature;
+	unsigned int *priv = dev_get_priv(dev);
+	u32 fuse = *priv;
+	struct mxc_ccm_anatop_reg *ccm_anatop = (struct mxc_ccm_anatop_reg *)
+						 ANATOP_BASE_ADDR;
+	/*
+	 * fuse data layout:
+	 * [31:21] sensor value @ 25C
+	 * [20:18] hot temperature value
+	 * [17:9] sensor value of room
+	 * [8:0] sensor value of hot
+	 */
+
+	raw_25c = fuse >> 21;
+	if (raw_25c == 0)
+		raw_25c = 25;
+
+	te1 = (fuse >> 9) & 0x1ff;
+
+	/*
+	 * now we only use single measure, every time we read
+	 * the temperature, we will power on/down anadig thermal
+	 * module
+	 */
+	writel(TEMPMON_HW_ANADIG_TEMPSENSE1_POWER_DOWN_MASK, &ccm_anatop->tempsense1_clr);
+	writel(PMU_REF_REFTOP_SELFBIASOFF_MASK, &ccm_anatop->ref_set);
+
+	/* write measure freq */
+	reg = readl(&ccm_anatop->tempsense1);
+	reg &= ~TEMPMON_HW_ANADIG_TEMPSENSE1_MEASURE_FREQ_MASK;
+	reg |= TEMPMON_HW_ANADIG_TEMPSENSE1_MEASURE_FREQ(MEASURE_FREQ);
+	writel(reg, &ccm_anatop->tempsense1);
+
+	writel(TEMPMON_HW_ANADIG_TEMPSENSE1_MEASURE_TEMP_MASK, &ccm_anatop->tempsense1_clr);
+	writel(TEMPMON_HW_ANADIG_TEMPSENSE1_FINISHED_MASK, &ccm_anatop->tempsense1_clr);
+	writel(TEMPMON_HW_ANADIG_TEMPSENSE1_MEASURE_TEMP_MASK, &ccm_anatop->tempsense1_set);
+
+	if (soc_rev() >= CHIP_REV_1_1) {
+		while ((readl(&ccm_anatop->tempsense1) &
+		       TEMPMON_HW_ANADIG_TEMPSENSE1_FINISHED_MASK) == 0)
+			;
+		reg = readl(&ccm_anatop->tempsense1);
+		tmp = (reg & TEMPMON_HW_ANADIG_TEMPSENSE1_TEMP_VALUE_MASK)
+		       >> TEMPMON_HW_ANADIG_TEMPSENSE1_TEMP_VALUE_SHIFT;
+	} else {
+		/*
+		 * Since we can not rely on finish bit, use 10ms
+		 * delay to get temperature. From RM, 17us is
+		 * enough to get data, but to gurantee to get
+		 * the data, delay 10ms here.
+		 */
+		udelay(10000);
+		reg = readl(&ccm_anatop->tempsense1);
+		tmp = (reg & TEMPMON_HW_ANADIG_TEMPSENSE1_TEMP_VALUE_MASK)
+		       >> TEMPMON_HW_ANADIG_TEMPSENSE1_TEMP_VALUE_SHIFT;
+	}
+
+	writel(TEMPMON_HW_ANADIG_TEMPSENSE1_FINISHED_MASK, &ccm_anatop->tempsense1_clr);
+
+	/* power down anatop thermal sensor */
+	writel(TEMPMON_HW_ANADIG_TEMPSENSE1_POWER_DOWN_MASK, &ccm_anatop->tempsense1_set);
+	writel(PMU_REF_REFTOP_SELFBIASOFF_MASK, &ccm_anatop->ref_clr);
+
+	/* Single point */
+	temperature = tmp - (te1 - raw_25c);
+
+	return temperature;
+}
+#endif
+
+int imx_thermal_get_temp(struct udevice *dev, int *temp)
+{
+	struct thermal_data *priv = dev_get_priv(dev);
+	int cpu_tmp = 0;
+
+	cpu_tmp = read_cpu_temperature(dev);
+
+	while (cpu_tmp >= priv->critical) {
+		printf("CPU Temperature (%dC) too close to max (%dC)",
+		       cpu_tmp, priv->maxc);
+		puts(" waiting...\n");
+		udelay(5000000);
+		cpu_tmp = read_cpu_temperature(dev);
+	}
+
+	*temp = cpu_tmp;
+
+	return 0;
+}
+
+static const struct dm_thermal_ops imx_thermal_ops = {
+	.get_temp	= imx_thermal_get_temp,
+};
+
+static int imx_thermal_probe(struct udevice *dev)
+{
+	unsigned int fuse = ~0;
+
+	const struct imx_thermal_plat *pdata = dev_get_plat(dev);
+	struct thermal_data *priv = dev_get_priv(dev);
+
+	/* Read Temperature calibration data fuse */
+	fuse_read(pdata->fuse_bank, pdata->fuse_word, &fuse);
+
+	if (is_soc_type(MXC_SOC_MX6)) {
+		/* Check for valid fuse */
+		if (fuse == 0 || fuse == ~0) {
+			debug("CPU:   Thermal invalid data, fuse: 0x%x\n",
+				fuse);
+			return -EPERM;
+		}
+	} else if (is_soc_type(MXC_SOC_MX7)) {
+		/* No Calibration data in FUSE? */
+		if ((fuse & 0x3ffff) == 0)
+			return -EPERM;
+		/* We do not support 105C TE2 */
+		if (((fuse & 0x1c0000) >> 18) == 0x6)
+			return -EPERM;
+	}
+
+	/* set critical cooling temp */
+	get_cpu_temp_grade(&priv->minc, &priv->maxc);
+	priv->critical = priv->maxc - TEMPERATURE_HOT_DELTA;
+	priv->fuse = fuse;
+
+	enable_thermal_clk();
+
+	return 0;
+}
+
+U_BOOT_DRIVER(imx_thermal) = {
+	.name	= "imx_thermal",
+	.id	= UCLASS_THERMAL,
+	.ops	= &imx_thermal_ops,
+	.probe	= imx_thermal_probe,
+	.priv_auto	= sizeof(struct thermal_data),
+	.flags  = DM_FLAG_PRE_RELOC,
+};