[linux-2.6-block.git] / drivers / thermal / qoriq_thermal.c

// SPDX-License-Identifier: GPL-2.0
//
// Copyright 2016 Freescale Semiconductor, Inc.

#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/err.h>
#include <linux/io.h>
#include <linux/of.h>
#include <linux/of_address.h>
#include <linux/thermal.h>

#include "thermal_core.h"

#define SITES_MAX	16

/*
 * QorIQ TMU Registers
 */
struct qoriq_tmu_site_regs {
	u32 tritsr;		/* Immediate Temperature Site Register */
	u32 tratsr;		/* Average Temperature Site Register */
	u8 res0[0x8];
};

struct qoriq_tmu_regs {
	u32 tmr;		/* Mode Register */
#define TMR_DISABLE	0x0
#define TMR_ME		0x80000000
#define TMR_ALPF	0x0c000000
	u32 tsr;		/* Status Register */
	u32 tmtmir;		/* Temperature measurement interval Register */
#define TMTMIR_DEFAULT	0x0000000f
	u8 res0[0x14];
	u32 tier;		/* Interrupt Enable Register */
#define TIER_DISABLE	0x0
	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 qoriq_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 qoriq_tmu_data;

/*
 * Thermal zone data
 */
struct qoriq_sensor {
	struct thermal_zone_device	*tzd;
	struct qoriq_tmu_data		*qdata;
	int				id;
};

struct qoriq_tmu_data {
	struct qoriq_tmu_regs __iomem *regs;
	bool little_endian;
	struct qoriq_sensor	*sensor[SITES_MAX];
};

static void tmu_write(struct qoriq_tmu_data *p, u32 val, void __iomem *addr)
{
	if (p->little_endian)
		iowrite32(val, addr);
	else
		iowrite32be(val, addr);
}

static u32 tmu_read(struct qoriq_tmu_data *p, void __iomem *addr)
{
	if (p->little_endian)
		return ioread32(addr);
	else
		return ioread32be(addr);
}

static int tmu_get_temp(void *p, int *temp)
{
	struct qoriq_sensor *qsensor = p;
	struct qoriq_tmu_data *qdata = qsensor->qdata;
	u32 val;

	val = tmu_read(qdata, &qdata->regs->site[qsensor->id].tritsr);
	*temp = (val & 0xff) * 1000;

	return 0;
}

static const struct thermal_zone_of_device_ops tmu_tz_ops = {
	.get_temp = tmu_get_temp,
};

static int qoriq_tmu_register_tmu_zone(struct platform_device *pdev)
{
	struct qoriq_tmu_data *qdata = platform_get_drvdata(pdev);
	int id, sites = 0;

	for (id = 0; id < SITES_MAX; id++) {
		qdata->sensor[id] = devm_kzalloc(&pdev->dev,
				sizeof(struct qoriq_sensor), GFP_KERNEL);
		if (!qdata->sensor[id])
			return -ENOMEM;

		qdata->sensor[id]->id = id;
		qdata->sensor[id]->qdata = qdata;
		qdata->sensor[id]->tzd = devm_thermal_zone_of_sensor_register(
				&pdev->dev, id, qdata->sensor[id], &tmu_tz_ops);
		if (IS_ERR(qdata->sensor[id]->tzd)) {
			if (PTR_ERR(qdata->sensor[id]->tzd) == -ENODEV)
				continue;
			else
				return PTR_ERR(qdata->sensor[id]->tzd);
		}

		sites |= 0x1 << (15 - id);
	}

	/* Enable monitoring */
	if (sites != 0)
		tmu_write(qdata, sites | TMR_ME | TMR_ALPF, &qdata->regs->tmr);

	return 0;
}

static int qoriq_tmu_calibration(struct platform_device *pdev)
{
	int i, val, len;
	u32 range[4];
	const u32 *calibration;
	struct device_node *np = pdev->dev.of_node;
	struct qoriq_tmu_data *data = platform_get_drvdata(pdev);

	if (of_property_read_u32_array(np, "fsl,tmu-range", range, 4)) {
		dev_err(&pdev->dev, "missing calibration range.\n");
		return -ENODEV;
	}

	/* Init temperature range registers */
	tmu_write(data, range[0], &data->regs->ttr0cr);
	tmu_write(data, range[1], &data->regs->ttr1cr);
	tmu_write(data, range[2], &data->regs->ttr2cr);
	tmu_write(data, range[3], &data->regs->ttr3cr);

	calibration = of_get_property(np, "fsl,tmu-calibration", &len);
	if (calibration == NULL || len % 8) {
		dev_err(&pdev->dev, "invalid calibration data.\n");
		return -ENODEV;
	}

	for (i = 0; i < len; i += 8, calibration += 2) {
		val = of_read_number(calibration, 1);
		tmu_write(data, val, &data->regs->ttcfgr);
		val = of_read_number(calibration + 1, 1);
		tmu_write(data, val, &data->regs->tscfgr);
	}

	return 0;
}

static void qoriq_tmu_init_device(struct qoriq_tmu_data *data)
{
	/* Disable interrupt, using polling instead */
	tmu_write(data, TIER_DISABLE, &data->regs->tier);

	/* Set update_interval */
	tmu_write(data, TMTMIR_DEFAULT, &data->regs->tmtmir);

	/* Disable monitoring */
	tmu_write(data, TMR_DISABLE, &data->regs->tmr);
}

static int qoriq_tmu_probe(struct platform_device *pdev)
{
	int ret;
	struct qoriq_tmu_data *data;
	struct device_node *np = pdev->dev.of_node;

	if (!np) {
		dev_err(&pdev->dev, "Device OF-Node is NULL");
		return -ENODEV;
	}

	data = devm_kzalloc(&pdev->dev, sizeof(struct qoriq_tmu_data),
			    GFP_KERNEL);
	if (!data)
		return -ENOMEM;

	platform_set_drvdata(pdev, data);

	data->little_endian = of_property_read_bool(np, "little-endian");

	data->regs = of_iomap(np, 0);
	if (!data->regs) {
		dev_err(&pdev->dev, "Failed to get memory region\n");
		ret = -ENODEV;
		goto err_iomap;
	}

	qoriq_tmu_init_device(data);	/* TMU initialization */

	ret = qoriq_tmu_calibration(pdev);	/* TMU calibration */
	if (ret < 0)
		goto err_tmu;

	ret = qoriq_tmu_register_tmu_zone(pdev);
	if (ret < 0) {
		dev_err(&pdev->dev, "Failed to register sensors\n");
		ret = -ENODEV;
		goto err_iomap;
	}

	return 0;

err_tmu:
	iounmap(data->regs);

err_iomap:
	platform_set_drvdata(pdev, NULL);

	return ret;
}

static int qoriq_tmu_remove(struct platform_device *pdev)
{
	struct qoriq_tmu_data *data = platform_get_drvdata(pdev);

	/* Disable monitoring */
	tmu_write(data, TMR_DISABLE, &data->regs->tmr);

	iounmap(data->regs);
	platform_set_drvdata(pdev, NULL);

	return 0;
}

#ifdef CONFIG_PM_SLEEP
static int qoriq_tmu_suspend(struct device *dev)
{
	u32 tmr;
	struct qoriq_tmu_data *data = dev_get_drvdata(dev);

	/* Disable monitoring */
	tmr = tmu_read(data, &data->regs->tmr);
	tmr &= ~TMR_ME;
	tmu_write(data, tmr, &data->regs->tmr);

	return 0;
}

static int qoriq_tmu_resume(struct device *dev)
{
	u32 tmr;
	struct qoriq_tmu_data *data = dev_get_drvdata(dev);

	/* Enable monitoring */
	tmr = tmu_read(data, &data->regs->tmr);
	tmr |= TMR_ME;
	tmu_write(data, tmr, &data->regs->tmr);

	return 0;
}
#endif

static SIMPLE_DEV_PM_OPS(qoriq_tmu_pm_ops,
			 qoriq_tmu_suspend, qoriq_tmu_resume);

static const struct of_device_id qoriq_tmu_match[] = {
	{ .compatible = "fsl,qoriq-tmu", },
	{ .compatible = "fsl,imx8mq-tmu", },
	{},
};
MODULE_DEVICE_TABLE(of, qoriq_tmu_match);

static struct platform_driver qoriq_tmu = {
	.driver	= {
		.name		= "qoriq_thermal",
		.pm		= &qoriq_tmu_pm_ops,
		.of_match_table	= qoriq_tmu_match,
	},
	.probe	= qoriq_tmu_probe,
	.remove	= qoriq_tmu_remove,
};
module_platform_driver(qoriq_tmu);

MODULE_AUTHOR("Jia Hongtao <hongtao.jia@nxp.com>");
MODULE_DESCRIPTION("QorIQ Thermal Monitoring Unit driver");
MODULE_LICENSE("GPL v2");
Commit	Line	Data
2dfef650 FE	1	// SPDX-License-Identifier: GPL-2.0
	2	//
	3	// Copyright 2016 Freescale Semiconductor, Inc.
43528445 JH	4
	5	#include <linux/module.h>
	6	#include <linux/platform_device.h>
	7	#include <linux/err.h>
	8	#include <linux/io.h>
	9	#include <linux/of.h>
	10	#include <linux/of_address.h>
	11	#include <linux/thermal.h>
	12
	13	#include "thermal_core.h"
	14
	15	#define SITES_MAX 16
	16
	17	/*
	18	* QorIQ TMU Registers
	19	*/
	20	struct qoriq_tmu_site_regs {
	21	u32 tritsr; /* Immediate Temperature Site Register */
	22	u32 tratsr; /* Average Temperature Site Register */
	23	u8 res0[0x8];
	24	};
	25
	26	struct qoriq_tmu_regs {
	27	u32 tmr; /* Mode Register */
	28	#define TMR_DISABLE 0x0
	29	#define TMR_ME 0x80000000
	30	#define TMR_ALPF 0x0c000000
	31	u32 tsr; /* Status Register */
	32	u32 tmtmir; /* Temperature measurement interval Register */
	33	#define TMTMIR_DEFAULT 0x0000000f
	34	u8 res0[0x14];
	35	u32 tier; /* Interrupt Enable Register */
	36	#define TIER_DISABLE 0x0
	37	u32 tidr; /* Interrupt Detect Register */
	38	u32 tiscr; /* Interrupt Site Capture Register */
	39	u32 ticscr; /* Interrupt Critical Site Capture Register */
	40	u8 res1[0x10];
	41	u32 tmhtcrh; /* High Temperature Capture Register */
	42	u32 tmhtcrl; /* Low Temperature Capture Register */
	43	u8 res2[0x8];
	44	u32 tmhtitr; /* High Temperature Immediate Threshold */
	45	u32 tmhtatr; /* High Temperature Average Threshold */
	46	u32 tmhtactr; /* High Temperature Average Crit Threshold */
	47	u8 res3[0x24];
	48	u32 ttcfgr; /* Temperature Configuration Register */
	49	u32 tscfgr; /* Sensor Configuration Register */
	50	u8 res4[0x78];
	51	struct qoriq_tmu_site_regs site[SITES_MAX];
	52	u8 res5[0x9f8];
	53	u32 ipbrr0; /* IP Block Revision Register 0 */
	54	u32 ipbrr1; /* IP Block Revision Register 1 */
	55	u8 res6[0x310];
	56	u32 ttr0cr; /* Temperature Range 0 Control Register */
	57	u32 ttr1cr; /* Temperature Range 1 Control Register */
	58	u32 ttr2cr; /* Temperature Range 2 Control Register */
	59	u32 ttr3cr; /* Temperature Range 3 Control Register */
	60	};
	61
7797ff42 YT	62	struct qoriq_tmu_data;
7797ff42 YT	63
43528445 JH	64	/*
	65	* Thermal zone data
	66	*/
7797ff42 YT	67	struct qoriq_sensor {
	68	struct thermal_zone_device *tzd;
	69	struct qoriq_tmu_data *qdata;
	70	int id;
	71	};
	72
43528445	73	struct qoriq_tmu_data {
43528445	74	struct qoriq_tmu_regs __iomem *regs;
43528445	75	bool little_endian;
7797ff42	76	struct qoriq_sensor *sensor[SITES_MAX];
43528445 JH	77	};
	78
	79	static void tmu_write(struct qoriq_tmu_data p, u32 val, void __iomem addr)
	80	{
	81	if (p->little_endian)
	82	iowrite32(val, addr);
	83	else
	84	iowrite32be(val, addr);
	85	}
	86
	87	static u32 tmu_read(struct qoriq_tmu_data p, void __iomem addr)
	88	{
	89	if (p->little_endian)
	90	return ioread32(addr);
	91	else
	92	return ioread32be(addr);
	93	}
	94
	95	static int tmu_get_temp(void p, int temp)
	96	{
7797ff42 YT	97	struct qoriq_sensor *qsensor = p;
7797ff42 YT	98	struct qoriq_tmu_data *qdata = qsensor->qdata;
43528445	99	u32 val;
43528445	100
7797ff42	101	val = tmu_read(qdata, &qdata->regs->site[qsensor->id].tritsr);
43528445 JH	102	temp = (val & 0xff) 1000;
	103
	104	return 0;
	105	}
	106
7797ff42 YT	107	static const struct thermal_zone_of_device_ops tmu_tz_ops = {
	108	.get_temp = tmu_get_temp,
	109	};
43528445	110
7797ff42 YT	111	static int qoriq_tmu_register_tmu_zone(struct platform_device *pdev)
	112	{
	113	struct qoriq_tmu_data *qdata = platform_get_drvdata(pdev);
	114	int id, sites = 0;
	115
	116	for (id = 0; id < SITES_MAX; id++) {
	117	qdata->sensor[id] = devm_kzalloc(&pdev->dev,
	118	sizeof(struct qoriq_sensor), GFP_KERNEL);
	119	if (!qdata->sensor[id])
	120	return -ENOMEM;
	121
	122	qdata->sensor[id]->id = id;
	123	qdata->sensor[id]->qdata = qdata;
	124	qdata->sensor[id]->tzd = devm_thermal_zone_of_sensor_register(
	125	&pdev->dev, id, qdata->sensor[id], &tmu_tz_ops);
	126	if (IS_ERR(qdata->sensor[id]->tzd)) {
	127	if (PTR_ERR(qdata->sensor[id]->tzd) == -ENODEV)
	128	continue;
	129	else
	130	return PTR_ERR(qdata->sensor[id]->tzd);
	131	}
	132
	133	sites \|= 0x1 << (15 - id);
43528445 JH	134	}
43528445 JH	135
7797ff42 YT	136	/* Enable monitoring */
	137	if (sites != 0)
	138	tmu_write(qdata, sites \| TMR_ME \| TMR_ALPF, &qdata->regs->tmr);
43528445	139
7797ff42	140	return 0;
43528445 JH	141	}
	142
	143	static int qoriq_tmu_calibration(struct platform_device *pdev)
	144	{
	145	int i, val, len;
	146	u32 range[4];
	147	const u32 *calibration;
	148	struct device_node *np = pdev->dev.of_node;
	149	struct qoriq_tmu_data *data = platform_get_drvdata(pdev);
	150
	151	if (of_property_read_u32_array(np, "fsl,tmu-range", range, 4)) {
	152	dev_err(&pdev->dev, "missing calibration range.\n");
	153	return -ENODEV;
	154	}
	155
	156	/* Init temperature range registers */
	157	tmu_write(data, range[0], &data->regs->ttr0cr);
	158	tmu_write(data, range[1], &data->regs->ttr1cr);
	159	tmu_write(data, range[2], &data->regs->ttr2cr);
	160	tmu_write(data, range[3], &data->regs->ttr3cr);
	161
	162	calibration = of_get_property(np, "fsl,tmu-calibration", &len);
	163	if (calibration == NULL \|\| len % 8) {
	164	dev_err(&pdev->dev, "invalid calibration data.\n");
	165	return -ENODEV;
	166	}
	167
	168	for (i = 0; i < len; i += 8, calibration += 2) {
	169	val = of_read_number(calibration, 1);
	170	tmu_write(data, val, &data->regs->ttcfgr);
	171	val = of_read_number(calibration + 1, 1);
	172	tmu_write(data, val, &data->regs->tscfgr);
	173	}
	174
	175	return 0;
	176	}
	177
	178	static void qoriq_tmu_init_device(struct qoriq_tmu_data *data)
	179	{
	180	/* Disable interrupt, using polling instead */
	181	tmu_write(data, TIER_DISABLE, &data->regs->tier);
	182
	183	/* Set update_interval */
	184	tmu_write(data, TMTMIR_DEFAULT, &data->regs->tmtmir);
	185
	186	/* Disable monitoring */
	187	tmu_write(data, TMR_DISABLE, &data->regs->tmr);
	188	}
	189
43528445 JH	190	static int qoriq_tmu_probe(struct platform_device *pdev)
	191	{
	192	int ret;
43528445 JH	193	struct qoriq_tmu_data *data;
43528445 JH	194	struct device_node *np = pdev->dev.of_node;
43528445 JH	195
	196	if (!np) {
	197	dev_err(&pdev->dev, "Device OF-Node is NULL");
	198	return -ENODEV;
	199	}
	200
	201	data = devm_kzalloc(&pdev->dev, sizeof(struct qoriq_tmu_data),
	202	GFP_KERNEL);
	203	if (!data)
	204	return -ENOMEM;
	205
	206	platform_set_drvdata(pdev, data);
	207
	208	data->little_endian = of_property_read_bool(np, "little-endian");
	209
43528445 JH	210	data->regs = of_iomap(np, 0);
	211	if (!data->regs) {
	212	dev_err(&pdev->dev, "Failed to get memory region\n");
	213	ret = -ENODEV;
	214	goto err_iomap;
	215	}
	216
	217	qoriq_tmu_init_device(data); /* TMU initialization */
	218
	219	ret = qoriq_tmu_calibration(pdev); /* TMU calibration */
	220	if (ret < 0)
	221	goto err_tmu;
	222
7797ff42 YT	223	ret = qoriq_tmu_register_tmu_zone(pdev);
	224	if (ret < 0) {
	225	dev_err(&pdev->dev, "Failed to register sensors\n");
	226	ret = -ENODEV;
	227	goto err_iomap;
43528445 JH	228	}
43528445 JH	229
43528445 JH	230	return 0;
	231
	232	err_tmu:
	233	iounmap(data->regs);
	234
	235	err_iomap:
	236	platform_set_drvdata(pdev, NULL);
	237
	238	return ret;
	239	}
	240
	241	static int qoriq_tmu_remove(struct platform_device *pdev)
	242	{
	243	struct qoriq_tmu_data *data = platform_get_drvdata(pdev);
	244
43528445 JH	245	/* Disable monitoring */
	246	tmu_write(data, TMR_DISABLE, &data->regs->tmr);
	247
	248	iounmap(data->regs);
	249	platform_set_drvdata(pdev, NULL);
	250
	251	return 0;
	252	}
	253
	254	#ifdef CONFIG_PM_SLEEP
	255	static int qoriq_tmu_suspend(struct device *dev)
	256	{
	257	u32 tmr;
	258	struct qoriq_tmu_data *data = dev_get_drvdata(dev);
	259
	260	/* Disable monitoring */
	261	tmr = tmu_read(data, &data->regs->tmr);
	262	tmr &= ~TMR_ME;
	263	tmu_write(data, tmr, &data->regs->tmr);
	264
	265	return 0;
	266	}
	267
	268	static int qoriq_tmu_resume(struct device *dev)
	269	{
	270	u32 tmr;
	271	struct qoriq_tmu_data *data = dev_get_drvdata(dev);
	272
	273	/* Enable monitoring */
	274	tmr = tmu_read(data, &data->regs->tmr);
	275	tmr \|= TMR_ME;
	276	tmu_write(data, tmr, &data->regs->tmr);
	277
	278	return 0;
	279	}
	280	#endif
	281
	282	static SIMPLE_DEV_PM_OPS(qoriq_tmu_pm_ops,
	283	qoriq_tmu_suspend, qoriq_tmu_resume);
	284
	285	static const struct of_device_id qoriq_tmu_match[] = {
	286	{ .compatible = "fsl,qoriq-tmu", },
6017e2a9	287	{ .compatible = "fsl,imx8mq-tmu", },
43528445 JH	288	{},
	289	};
	290	MODULE_DEVICE_TABLE(of, qoriq_tmu_match);
	291
	292	static struct platform_driver qoriq_tmu = {
	293	.driver = {
	294	.name = "qoriq_thermal",
	295	.pm = &qoriq_tmu_pm_ops,
	296	.of_match_table = qoriq_tmu_match,
	297	},
	298	.probe = qoriq_tmu_probe,
	299	.remove = qoriq_tmu_remove,
	300	};
	301	module_platform_driver(qoriq_tmu);
	302
	303	MODULE_AUTHOR("Jia Hongtao <hongtao.jia@nxp.com>");
	304	MODULE_DESCRIPTION("QorIQ Thermal Monitoring Unit driver");
	305	MODULE_LICENSE("GPL v2");