diff options
Diffstat (limited to 'drivers/thermal/rcar_thermal.c')
| -rw-r--r-- | drivers/thermal/rcar_thermal.c | 571 |
1 files changed, 0 insertions, 571 deletions
diff --git a/drivers/thermal/rcar_thermal.c b/drivers/thermal/rcar_thermal.c deleted file mode 100644 index 73e5fee6cf1d..000000000000 --- a/drivers/thermal/rcar_thermal.c +++ /dev/null @@ -1,571 +0,0 @@ -/* - * 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); -} - -#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); -} - -#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); -} - -#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); -} - -#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); -} - -#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); -} - -/* - * 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; -} - -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; -} - -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); -} - -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); -} - -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; -} - -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; -} - -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; -} - -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); -} - -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); -} - -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; -} - -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; -} - -/* - * 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; -} - -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; -} - -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>"); |