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Release 4.10 drivers/thermal/rcar_thermal.c

Directory: drivers/thermal
/*
 *  R-Car THS/TSC thermal sensor driver
 *
 * Copyright (C) 2012 Renesas Solutions Corp.
 * Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; version 2 of the License.
 *
 *  This program is distributed in the hope that it will be useful, but
 *  WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 *  General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License along
 *  with this program; if not, write to the Free Software Foundation, Inc.,
 *  59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
 */
#include <linux/delay.h>
#include <linux/err.h>
#include <linux/irq.h>
#include <linux/interrupt.h>
#include <linux/io.h>
#include <linux/module.h>
#include <linux/of_device.h>
#include <linux/platform_device.h>
#include <linux/pm_runtime.h>
#include <linux/reboot.h>
#include <linux/slab.h>
#include <linux/spinlock.h>
#include <linux/thermal.h>

#include "thermal_hwmon.h"


#define IDLE_INTERVAL	5000


#define COMMON_STR	0x00

#define COMMON_ENR	0x04

#define COMMON_INTMSK	0x0c


#define REG_POSNEG	0x20

#define REG_FILONOFF	0x28

#define REG_THSCR	0x2c

#define REG_THSSR	0x30

#define REG_INTCTRL	0x34

/* THSCR */

#define CPCTL	(1 << 12)

/* THSSR */

#define CTEMP	0x3f


struct rcar_thermal_common {
	
void __iomem *base;
	
struct device *dev;
	
struct list_head head;
	
spinlock_t lock;
};


struct rcar_thermal_priv {
	
void __iomem *base;
	
struct rcar_thermal_common *common;
	
struct thermal_zone_device *zone;
	
struct delayed_work work;
	
struct mutex lock;
	
struct list_head list;
	
int id;
	
u32 ctemp;
};


#define rcar_thermal_for_each_priv(pos, common)	\
	list_for_each_entry(pos, &common->head, list)


#define MCELSIUS(temp)			((temp) * 1000)

#define rcar_zone_to_priv(zone)		((zone)->devdata)

#define rcar_priv_to_dev(priv)		((priv)->common->dev)

#define rcar_has_irq_support(priv)	((priv)->common->base)

#define rcar_id_to_shift(priv)		((priv)->id * 8)

#define rcar_of_data(dev)		((unsigned long)of_device_get_match_data(dev))

#define rcar_use_of_thermal(dev)	(rcar_of_data(dev) == USE_OF_THERMAL)


#define USE_OF_THERMAL	1

static const struct of_device_id rcar_thermal_dt_ids[] = {
	{ .compatible = "renesas,rcar-thermal", },
	{ .compatible = "renesas,rcar-gen2-thermal", .data = (void *)USE_OF_THERMAL },
	{},
};
MODULE_DEVICE_TABLE(of, rcar_thermal_dt_ids);

/*
 *              basic functions
 */

#define rcar_thermal_common_read(c, r) \
	_rcar_thermal_common_read(c, COMMON_ ##r)

static u32 _rcar_thermal_common_read(struct rcar_thermal_common *common, u32 reg) { return ioread32(common->base + reg); }

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kuninori morimotokuninori morimoto24100.00%1100.00%
Total24100.00%1100.00%

#define rcar_thermal_common_write(c, r, d) \ _rcar_thermal_common_write(c, COMMON_ ##r, d)
static void _rcar_thermal_common_write(struct rcar_thermal_common *common, u32 reg, u32 data) { iowrite32(data, common->base + reg); }

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kuninori morimotokuninori morimoto28100.00%1100.00%
Total28100.00%1100.00%

#define rcar_thermal_common_bset(c, r, m, d) \ _rcar_thermal_common_bset(c, COMMON_ ##r, m, d)
static void _rcar_thermal_common_bset(struct rcar_thermal_common *common, u32 reg, u32 mask, u32 data) { u32 val; val = ioread32(common->base + reg); val &= ~mask; val |= (data & mask); iowrite32(val, common->base + reg); }

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kuninori morimotokuninori morimoto58100.00%1100.00%
Total58100.00%1100.00%

#define rcar_thermal_read(p, r) _rcar_thermal_read(p, REG_ ##r)
static u32 _rcar_thermal_read(struct rcar_thermal_priv *priv, u32 reg) { return ioread32(priv->base + reg); }

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kuninori morimotokuninori morimoto24100.00%3100.00%
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#define rcar_thermal_write(p, r, d) _rcar_thermal_write(p, REG_ ##r, d)
static void _rcar_thermal_write(struct rcar_thermal_priv *priv, u32 reg, u32 data) { iowrite32(data, priv->base + reg); }

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kuninori morimotokuninori morimoto28100.00%1100.00%
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#define rcar_thermal_bset(p, r, m, d) _rcar_thermal_bset(p, REG_ ##r, m, d)
static void _rcar_thermal_bset(struct rcar_thermal_priv *priv, u32 reg, u32 mask, u32 data) { u32 val; val = ioread32(priv->base + reg); val &= ~mask; val |= (data & mask); iowrite32(val, priv->base + reg); }

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kuninori morimotokuninori morimoto58100.00%2100.00%
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/* * zone device functions */
static int rcar_thermal_update_temp(struct rcar_thermal_priv *priv) { struct device *dev = rcar_priv_to_dev(priv); int i; u32 ctemp, old, new; int ret = -EINVAL; mutex_lock(&priv->lock); /* * TSC decides a value of CPTAP automatically, * and this is the conditions which validate interrupt. */ rcar_thermal_bset(priv, THSCR, CPCTL, CPCTL); ctemp = 0; old = ~0; for (i = 0; i < 128; i++) { /* * we need to wait 300us after changing comparator offset * to get stable temperature. * see "Usage Notes" on datasheet */ udelay(300); new = rcar_thermal_read(priv, THSSR) & CTEMP; if (new == old) { ctemp = new; break; } old = new; } if (!ctemp) { dev_err(dev, "thermal sensor was broken\n"); goto err_out_unlock; } /* * enable IRQ */ if (rcar_has_irq_support(priv)) { rcar_thermal_write(priv, FILONOFF, 0); /* enable Rising/Falling edge interrupt */ rcar_thermal_write(priv, POSNEG, 0x1); rcar_thermal_write(priv, INTCTRL, (((ctemp - 0) << 8) | ((ctemp - 1) << 0))); } dev_dbg(dev, "thermal%d %d -> %d\n", priv->id, priv->ctemp, ctemp); priv->ctemp = ctemp; ret = 0; err_out_unlock: mutex_unlock(&priv->lock); return ret; }

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kuninori morimotokuninori morimoto21392.61%571.43%
wei yongjunwei yongjun166.96%114.29%
yoshihiro shimodayoshihiro shimoda10.43%114.29%
Total230100.00%7100.00%


static int rcar_thermal_get_current_temp(struct rcar_thermal_priv *priv, int *temp) { int tmp; int ret; ret = rcar_thermal_update_temp(priv); if (ret < 0) return ret; mutex_lock(&priv->lock); tmp = MCELSIUS((priv->ctemp * 5) - 65); mutex_unlock(&priv->lock); if ((tmp < MCELSIUS(-45)) || (tmp > MCELSIUS(125))) { struct device *dev = rcar_priv_to_dev(priv); dev_err(dev, "it couldn't measure temperature correctly\n"); return -EIO; } *temp = tmp; return 0; }

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kuninori morimotokuninori morimoto11999.17%787.50%
sascha hauersascha hauer10.83%112.50%
Total120100.00%8100.00%


static int rcar_thermal_of_get_temp(void *data, int *temp) { struct rcar_thermal_priv *priv = data; return rcar_thermal_get_current_temp(priv, temp); }

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kuninori morimotokuninori morimoto29100.00%1100.00%
Total29100.00%1100.00%


static int rcar_thermal_get_temp(struct thermal_zone_device *zone, int *temp) { struct rcar_thermal_priv *priv = rcar_zone_to_priv(zone); return rcar_thermal_get_current_temp(priv, temp); }

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kuninori morimotokuninori morimoto33100.00%1100.00%
Total33100.00%1100.00%


static int rcar_thermal_get_trip_type(struct thermal_zone_device *zone, int trip, enum thermal_trip_type *type) { struct rcar_thermal_priv *priv = rcar_zone_to_priv(zone); struct device *dev = rcar_priv_to_dev(priv); /* see rcar_thermal_get_temp() */ switch (trip) { case 0: /* +90 <= temp */ *type = THERMAL_TRIP_CRITICAL; break; default: dev_err(dev, "rcar driver trip error\n"); return -EINVAL; } return 0; }

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kuninori morimotokuninori morimoto71100.00%2100.00%
Total71100.00%2100.00%


static int rcar_thermal_get_trip_temp(struct thermal_zone_device *zone, int trip, int *temp) { struct rcar_thermal_priv *priv = rcar_zone_to_priv(zone); struct device *dev = rcar_priv_to_dev(priv); /* see rcar_thermal_get_temp() */ switch (trip) { case 0: /* +90 <= temp */ *temp = MCELSIUS(90); break; default: dev_err(dev, "rcar driver trip error\n"); return -EINVAL; } return 0; }

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kuninori morimotokuninori morimoto7298.63%266.67%
sascha hauersascha hauer11.37%133.33%
Total73100.00%3100.00%


static int rcar_thermal_notify(struct thermal_zone_device *zone, int trip, enum thermal_trip_type type) { struct rcar_thermal_priv *priv = rcar_zone_to_priv(zone); struct device *dev = rcar_priv_to_dev(priv); switch (type) { case THERMAL_TRIP_CRITICAL: /* FIXME */ dev_warn(dev, "Thermal reached to critical temperature\n"); break; default: break; } return 0; }

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kuninori morimotokuninori morimoto61100.00%2100.00%
Total61100.00%2100.00%

static const struct thermal_zone_of_device_ops rcar_thermal_zone_of_ops = { .get_temp = rcar_thermal_of_get_temp, }; static struct thermal_zone_device_ops rcar_thermal_zone_ops = { .get_temp = rcar_thermal_get_temp, .get_trip_type = rcar_thermal_get_trip_type, .get_trip_temp = rcar_thermal_get_trip_temp, .notify = rcar_thermal_notify, }; /* * interrupt */ #define rcar_thermal_irq_enable(p) _rcar_thermal_irq_ctrl(p, 1) #define rcar_thermal_irq_disable(p) _rcar_thermal_irq_ctrl(p, 0)
static void _rcar_thermal_irq_ctrl(struct rcar_thermal_priv *priv, int enable) { struct rcar_thermal_common *common = priv->common; unsigned long flags; u32 mask = 0x3 << rcar_id_to_shift(priv); /* enable Rising/Falling */ if (!rcar_has_irq_support(priv)) return; spin_lock_irqsave(&common->lock, flags); rcar_thermal_common_bset(common, INTMSK, mask, enable ? 0 : mask); spin_unlock_irqrestore(&common->lock, flags); }

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kuninori morimotokuninori morimoto82100.00%2100.00%
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static void rcar_thermal_work(struct work_struct *work) { struct rcar_thermal_priv *priv; int cctemp, nctemp; int ret; priv = container_of(work, struct rcar_thermal_priv, work.work); ret = rcar_thermal_get_current_temp(priv, &cctemp); if (ret < 0) return; ret = rcar_thermal_update_temp(priv); if (ret < 0) return; rcar_thermal_irq_enable(priv); ret = rcar_thermal_get_current_temp(priv, &nctemp); if (ret < 0) return; if (nctemp != cctemp) thermal_zone_device_update(priv->zone, THERMAL_EVENT_UNSPECIFIED); }

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kuninori morimotokuninori morimoto7974.53%350.00%
patrick titianopatrick titiano2422.64%116.67%
srinivas pandruvadasrinivas pandruvada21.89%116.67%
sascha hauersascha hauer10.94%116.67%
Total106100.00%6100.00%


static u32 rcar_thermal_had_changed(struct rcar_thermal_priv *priv, u32 status) { struct device *dev = rcar_priv_to_dev(priv); status = (status >> rcar_id_to_shift(priv)) & 0x3; if (status) { dev_dbg(dev, "thermal%d %s%s\n", priv->id, (status & 0x2) ? "Rising " : "", (status & 0x1) ? "Falling" : ""); } return status; }

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kuninori morimotokuninori morimoto77100.00%1100.00%
Total77100.00%1100.00%


static irqreturn_t rcar_thermal_irq(int irq, void *data) { struct rcar_thermal_common *common = data; struct rcar_thermal_priv *priv; unsigned long flags; u32 status, mask; spin_lock_irqsave(&common->lock, flags); mask = rcar_thermal_common_read(common, INTMSK); status = rcar_thermal_common_read(common, STR); rcar_thermal_common_write(common, STR, 0x000F0F0F & mask); spin_unlock_irqrestore(&common->lock, flags); status = status & ~mask; /* * check the status */ rcar_thermal_for_each_priv(priv, common) { if (rcar_thermal_had_changed(priv, status)) { rcar_thermal_irq_disable(priv); schedule_delayed_work(&priv->work, msecs_to_jiffies(300)); } } return IRQ_HANDLED; }

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kuninori morimotokuninori morimoto131100.00%1100.00%
Total131100.00%1100.00%

/* * platform functions */
static int rcar_thermal_remove(struct platform_device *pdev) { struct rcar_thermal_common *common = platform_get_drvdata(pdev); struct device *dev = &pdev->dev; struct rcar_thermal_priv *priv; rcar_thermal_for_each_priv(priv, common) { rcar_thermal_irq_disable(priv); if (rcar_use_of_thermal(dev)) thermal_remove_hwmon_sysfs(priv->zone); else thermal_zone_device_unregister(priv->zone); } pm_runtime_put(dev); pm_runtime_disable(dev); return 0; }

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kuninori morimotokuninori morimoto8398.81%266.67%
bui duc phucbui duc phuc11.19%133.33%
Total84100.00%3100.00%


static int rcar_thermal_probe(struct platform_device *pdev) { struct rcar_thermal_common *common; struct rcar_thermal_priv *priv; struct device *dev = &pdev->dev; struct resource *res, *irq; int mres = 0; int i; int ret = -ENODEV; int idle = IDLE_INTERVAL; u32 enr_bits = 0; common = devm_kzalloc(dev, sizeof(*common), GFP_KERNEL); if (!common) return -ENOMEM; platform_set_drvdata(pdev, common); INIT_LIST_HEAD(&common->head); spin_lock_init(&common->lock); common->dev = dev; pm_runtime_enable(dev); pm_runtime_get_sync(dev); irq = platform_get_resource(pdev, IORESOURCE_IRQ, 0); if (irq) { /* * platform has IRQ support. * Then, driver uses common registers * rcar_has_irq_support() will be enabled */ res = platform_get_resource(pdev, IORESOURCE_MEM, mres++); common->base = devm_ioremap_resource(dev, res); if (IS_ERR(common->base)) return PTR_ERR(common->base); idle = 0; /* polling delay is not needed */ } for (i = 0;; i++) { res = platform_get_resource(pdev, IORESOURCE_MEM, mres++); if (!res) break; priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL); if (!priv) { ret = -ENOMEM; goto error_unregister; } priv->base = devm_ioremap_resource(dev, res); if (IS_ERR(priv->base)) { ret = PTR_ERR(priv->base); goto error_unregister; } priv->common = common; priv->id = i; mutex_init(&priv->lock); INIT_LIST_HEAD(&priv->list); INIT_DELAYED_WORK(&priv->work, rcar_thermal_work); ret = rcar_thermal_update_temp(priv); if (ret < 0) goto error_unregister; if (rcar_use_of_thermal(dev)) priv->zone = devm_thermal_zone_of_sensor_register( dev, i, priv, &rcar_thermal_zone_of_ops); else priv->zone = thermal_zone_device_register( "rcar_thermal", 1, 0, priv, &rcar_thermal_zone_ops, NULL, 0, idle); if (IS_ERR(priv->zone)) { dev_err(dev, "can't register thermal zone\n"); ret = PTR_ERR(priv->zone); priv->zone = NULL; goto error_unregister; } if (rcar_use_of_thermal(dev)) { /* * thermal_zone doesn't enable hwmon as default, * but, enable it here to keep compatible */ priv->zone->tzp->no_hwmon = false; ret = thermal_add_hwmon_sysfs(priv->zone); if (ret) goto error_unregister; } rcar_thermal_irq_enable(priv); list_move_tail(&priv->list, &common->head); /* update ENR bits */ enr_bits |= 3 << (i * 8); } /* enable temperature comparation */ if (irq) { ret = devm_request_irq(dev, irq->start, rcar_thermal_irq, 0, dev_name(dev), common); if (ret) { dev_err(dev, "irq request failed\n "); goto error_unregister; } rcar_thermal_common_write(common, ENR, enr_bits); } dev_info(dev, "%d sensor probed\n", i); return 0; error_unregister: rcar_thermal_remove(pdev); return ret; }

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kuninori morimotokuninori morimoto43477.22%1047.62%
geert uytterhoevengeert uytterhoeven427.47%29.52%
yoshihiro shimodayoshihiro shimoda305.34%14.76%
sachin kamatsachin kamat173.02%14.76%
devendra nagadevendra naga173.02%29.52%
wolfram sangwolfram sang122.14%14.76%
dirk behmedirk behme61.07%14.76%
durgadoss rdurgadoss r20.36%14.76%
laurent pinchartlaurent pinchart10.18%14.76%
eduardo valentineduardo valentin10.18%14.76%
Total562100.00%21100.00%

static struct platform_driver rcar_thermal_driver = { .driver = { .name = "rcar_thermal", .of_match_table = rcar_thermal_dt_ids, }, .probe = rcar_thermal_probe, .remove = rcar_thermal_remove, }; module_platform_driver(rcar_thermal_driver); MODULE_LICENSE("GPL"); MODULE_DESCRIPTION("R-Car THS/TSC thermal sensor driver"); MODULE_AUTHOR("Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>");

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kuninori morimotokuninori morimoto213592.38%2054.05%
geert uytterhoevengeert uytterhoeven421.82%25.41%
yoshihiro shimodayoshihiro shimoda321.38%25.41%
patrick titianopatrick titiano241.04%12.70%
sachin kamatsachin kamat170.74%12.70%
devendra nagadevendra naga170.74%25.41%
wei yongjunwei yongjun160.69%12.70%
wolfram sangwolfram sang120.52%12.70%
dirk behmedirk behme60.26%12.70%
sascha hauersascha hauer30.13%12.70%
durgadoss rdurgadoss r20.09%12.70%
srinivas pandruvadasrinivas pandruvada20.09%12.70%
eduardo valentineduardo valentin10.04%12.70%
bui duc phucbui duc phuc10.04%12.70%
laurent pinchartlaurent pinchart10.04%12.70%
Total2311100.00%37100.00%
Directory: drivers/thermal
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