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Date: Thu, 15 Aug 2013 15:24:01 +0800
From: Zhang Rui <rui.zhang@...el.com>
To: Felipe Contreras <felipe.contreras@...il.com>
Cc: linux-pm@...r.kernel.org,
Eduardo Valentin <eduardo.valentin@...com>,
linux-kernel@...r.kernel.org, corentin.chary@...il.com,
matthew.garrett@...ula.com,
x86-drivers <platform-driver-x86@...r.kernel.org>
Subject: Re: [PATCH] thermal: new asus driver
On 四, 2013-08-15 at 15:22 +0800, Zhang Rui wrote:
> On 二, 2013-08-06 at 17:48 -0500, Felipe Contreras wrote:
> > Simple driver to enable control of the fan in ASUS laptops. So far this
> > has only been tested in ASUS Zenbook Prime UX31A, but according to some
> > online reference [1], it should work in other models as well.
> >
> I'd rather prefer to do this in the vendor driver like asus-laptop.c.
> Say, it is the asus-laptop driver that knows the fan control ability of
> the platform and register to the thermal framework.
>
> > Another source was a patch acpi4asus-user's mailing list [2].
> >
> > [1]
> > http://forum.notebookreview.com/asus/705656-fan-control-asus-prime-ux31-ux31a-ux32a-ux32vd.html
> > [2]
> > http://www.mail-archive.com/acpi4asus-user@lists.sourceforge.net/msg00065.html
> >
> > Signed-off-by: Felipe Contreras <felipe.contreras@...il.com>
> > ---
> >
> > I've never implemented a driver like this, so I've no idea if this is the right way to do it.
> >
> > drivers/thermal/Kconfig | 7 ++++
> > drivers/thermal/Makefile | 1 +
> > drivers/thermal/asus_thermal.c | 94 ++++++++++++++++++++++++++++++++++++++++++
> > 3 files changed, 102 insertions(+)
> > create mode 100644 drivers/thermal/asus_thermal.c
> >
> > diff --git a/drivers/thermal/Kconfig b/drivers/thermal/Kconfig
> > index e988c81..0c5b624 100644
> > --- a/drivers/thermal/Kconfig
> > +++ b/drivers/thermal/Kconfig
> > @@ -184,4 +184,11 @@ menu "Texas Instruments thermal drivers"
> > source "drivers/thermal/ti-soc-thermal/Kconfig"
> > endmenu
> >
> > +config ASUS_THERMAL
> > + tristate "ASUS thermal driver"
> > + depends on THERMAL
> > + depends on X86
> > + help
> > + Enables control of the fan in ASUS laptops.
> > +
> > endif
> > diff --git a/drivers/thermal/Makefile b/drivers/thermal/Makefile
> > index 67184a2..ab4ea6f 100644
> > --- a/drivers/thermal/Makefile
> > +++ b/drivers/thermal/Makefile
> > @@ -25,3 +25,4 @@ obj-$(CONFIG_DB8500_CPUFREQ_COOLING) += db8500_cpufreq_cooling.o
> > obj-$(CONFIG_INTEL_POWERCLAMP) += intel_powerclamp.o
> > obj-$(CONFIG_X86_PKG_TEMP_THERMAL) += x86_pkg_temp_thermal.o
> > obj-$(CONFIG_TI_SOC_THERMAL) += ti-soc-thermal/
> > +obj-$(CONFIG_ASUS_THERMAL) += asus_thermal.o
> > diff --git a/drivers/thermal/asus_thermal.c b/drivers/thermal/asus_thermal.c
> > new file mode 100644
> > index 0000000..eceeee3
> > --- /dev/null
> > +++ b/drivers/thermal/asus_thermal.c
> > @@ -0,0 +1,94 @@
> > +#include <linux/module.h>
> > +#include <linux/kernel.h>
> > +#include <linux/init.h>
> > +#include <linux/acpi.h>
> > +#include <linux/thermal.h>
> > +#include <linux/dmi.h>
> > +
> > +MODULE_AUTHOR("Felipe Contreras <felipe.contreras@...il.com>");
> > +MODULE_DESCRIPTION("ASUS fan driver");
> > +MODULE_LICENSE("GPL");
> > +
> > +static struct thermal_cooling_device *cdev;
> > +
> > +static int fan_get_max_state(struct thermal_cooling_device *cdev,
> > + unsigned long *state)
> > +{
> > + *state = 0xff;
> > + return 0;
> > +}
> > +
> > +static int fan_get_cur_state(struct thermal_cooling_device *cdev,
> > + unsigned long *state)
> > +{
> > + struct acpi_object_list params;
> > + union acpi_object in_objs[1];
> > + unsigned long long value;
> > + acpi_status r;
> > +
> > + params.count = ARRAY_SIZE(in_objs);
> > + params.pointer = in_objs;
> > + in_objs[0].type = ACPI_TYPE_INTEGER;
> > + in_objs[0].integer.value = 0;
> > +
> > + r = acpi_evaluate_integer(NULL, "\\_TZ.RFAN", ¶ms, &value);
> > + if (r != AE_OK)
> > + return r;
> > +
> > + *state = value;
> > +
> > + return 0;
> > +}
> > +
> > +static int fan_set(struct thermal_cooling_device *cdev, int fan, int speed)
> > +{
> > + struct acpi_object_list params;
> > + union acpi_object in_objs[2];
> > + unsigned long long value;
> > +
> > + params.count = ARRAY_SIZE(in_objs);
> > + params.pointer = in_objs;
> > + in_objs[0].type = ACPI_TYPE_INTEGER;
> > + in_objs[0].integer.value = fan;
> > + in_objs[1].type = ACPI_TYPE_INTEGER;
> > + in_objs[1].integer.value = speed;
> > +
> > + return acpi_evaluate_integer(NULL, "\\_SB.PCI0.LPCB.EC0.SFNV", ¶ms, &value);
> > +}
> > +
> I checked a couple of BIOS, and it seems that both of these two methods
> can be invoked by ATKD.WMNB indirectly.
> So I'm wondering if it is proper to invoke these two methods directly,
> and if these are some features/functionalities that are still missing in
> the asus-laptop driver.
>
> CC Corentin and Matthew.
>
CC x86 platform drivers mailing list as well.
> thanks,
> rui
> > +static int fan_set_cur_state(struct thermal_cooling_device *cdev,
> > + unsigned long state)
> > +{
> > + return fan_set(cdev, 1, state);
> > +}
> > +
> > +static int fan_set_auto(struct thermal_cooling_device *cdev)
> > +{
> > + return fan_set(cdev, 0, 0);
> > +}
> > +
> > +static const struct thermal_cooling_device_ops fan_cooling_ops = {
> > + .get_max_state = fan_get_max_state,
> > + .get_cur_state = fan_get_cur_state,
> > + .set_cur_state = fan_set_cur_state,
> > +};
> > +
> > +static int __init fan_init(void)
> > +{
> > + if (strcmp(dmi_get_system_info(DMI_SYS_VENDOR), "ASUSTeK COMPUTER INC."))
> > + return -ENODEV;
> > + cdev = thermal_cooling_device_register("Fan", NULL, &fan_cooling_ops);
> > + if (IS_ERR(cdev))
> > + return PTR_ERR(cdev);
> > + fan_set_auto(cdev);
> > + return 0;
> > +}
> > +
> > +static void __exit fan_exit(void)
> > +{
> > + fan_set_auto(cdev);
> > + thermal_cooling_device_unregister(cdev);
> > +}
> > +
> > +module_init(fan_init);
> > +module_exit(fan_exit);
>
>
> --
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