On Thu, Mar 24, 2011 at 11:02 PM, Andy Ross <[email protected]> wrote:
> Ambient light sensor for Pegatron Lucid. Supports pre-existing
> ls_switch sysfs interface to en/disable automatic control, and exports
> the brightness from the device as "ls_value".
>
> Signed-off-by: Andy Ross <[email protected]>
> ---
> drivers/platform/x86/asus-laptop.c | 70
> +++++++++++++++++++++++++++++++++---
> 1 files changed, 65 insertions(+), 5 deletions(-)
>
> diff --git a/drivers/platform/x86/asus-laptop.c
> b/drivers/platform/x86/asus-laptop.c
> index ec46d71..6651d8c 100644
> --- a/drivers/platform/x86/asus-laptop.c
> +++ b/drivers/platform/x86/asus-laptop.c
> @@ -214,9 +214,15 @@ static char *display_get_paths[] = {
>
> /* For Pegatron Lucid tablet */
> #define DEVICE_NAME_PEGA "Lucid"
> +
> #define METHOD_PEGA_ENABLE "ENPR"
> #define METHOD_PEGA_DISABLE "DAPR"
> +#define PEGA_ALS 0x04
> +#define PEGA_ALS_POWER 0x05
> +
> #define METHOD_PEGA_READ "RDLN"
> +#define PEGA_READ_ALS_H 0x02
> +#define PEGA_READ_ALS_L 0x03
>
> /*
> * Define a specific led structure to keep the main structure clean
> @@ -378,6 +384,12 @@ static bool asus_check_pega_lucid(struct asus_laptop
> *asus)
> !acpi_check_handle(asus->handle, METHOD_PEGA_READ, NULL);
> }
>
> +static int asus_pega_lucid_set(struct asus_laptop *asus, int unit, bool
> enable)
> +{
> + char *method = enable ? METHOD_PEGA_ENABLE : METHOD_PEGA_DISABLE;
> + return write_acpi_int(asus->handle, method, unit);
> +}
> +
> /* Generic LED function */
> static int asus_led_set(struct asus_laptop *asus, const char *method,
> int value)
> @@ -1046,7 +1058,15 @@ static ssize_t store_disp(struct device *dev, struct
> device_attribute *attr,
> */
> static void asus_als_switch(struct asus_laptop *asus, int value)
> {
> - if (write_acpi_int(asus->handle, METHOD_ALS_CONTROL, value))
> + int ret;
> + if (asus->have_pega_lucid) {
> + ret = asus_pega_lucid_set(asus, PEGA_ALS, value);
> + if (!ret)
> + ret = asus_pega_lucid_set(asus, PEGA_ALS_POWER,
> value);
> + } else {
> + ret = write_acpi_int(asus->handle, METHOD_ALS_CONTROL, value);
> + }
> + if (ret)
> pr_warning("Error setting light sensor switch\n");
> asus->light_switch = value;
> }
> @@ -1103,6 +1123,35 @@ static ssize_t store_lslvl(struct device *dev, struct
> device_attribute *attr,
> return rv;
> }
>
> +static int pega_int_read(struct asus_laptop *asus, int arg, int *result)
> +{
> + struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
> + int err = write_acpi_int_ret(asus->handle, METHOD_PEGA_READ, arg,
> + &buffer);
> + if (!err) {
> + union acpi_object *obj = buffer.pointer;
I think a kfree(buffer.pointer); is missing here.
> + if (obj && obj->type == ACPI_TYPE_INTEGER)
> + *result = obj->integer.value;
> + else
> + err = -EIO;
> + }
> + return err;
> +}
> +
> +static ssize_t show_lsvalue(struct device *dev,
> + struct device_attribute *attr, char *buf)
> +{
> + struct asus_laptop *asus = dev_get_drvdata(dev);
> + int err, hi, lo;
> +
> + err = pega_int_read(asus, PEGA_READ_ALS_H, &hi);
> + if (!err)
> + err = pega_int_read(asus, PEGA_READ_ALS_L, &lo);
> + if (!err)
> + return sprintf(buf, "%d\n", 10 * hi + lo);
> + return err;
> +}
> +
> /*
> * GPS
> */
> @@ -1300,6 +1349,7 @@ static DEVICE_ATTR(wimax, S_IRUGO | S_IWUSR,
> show_wimax, store_wimax);
> static DEVICE_ATTR(wwan, S_IRUGO | S_IWUSR, show_wwan, store_wwan);
> static DEVICE_ATTR(display, S_IRUGO | S_IWUSR, show_disp, store_disp);
> static DEVICE_ATTR(ledd, S_IRUGO | S_IWUSR, show_ledd, store_ledd);
> +static DEVICE_ATTR(ls_value, S_IRUGO, show_lsvalue, NULL);
Could you document that new file in
Documentation/ABI/testing/sysfs-platform-asus-laptop ?
> static DEVICE_ATTR(ls_level, S_IRUGO | S_IWUSR, show_lslvl, store_lslvl);
> static DEVICE_ATTR(ls_switch, S_IRUGO | S_IWUSR, show_lssw, store_lssw);
> static DEVICE_ATTR(gps, S_IRUGO | S_IWUSR, show_gps, store_gps);
> @@ -1312,6 +1362,7 @@ static struct attribute *asus_attributes[] = {
> &dev_attr_wwan.attr,
> &dev_attr_display.attr,
> &dev_attr_ledd.attr,
> + &dev_attr_ls_value.attr,
> &dev_attr_ls_level.attr,
> &dev_attr_ls_switch.attr,
> &dev_attr_gps.attr,
> @@ -1349,8 +1400,15 @@ static mode_t asus_sysfs_is_visible(struct kobject
> *kobj,
>
> } else if (attr == &dev_attr_ls_switch.attr ||
> attr == &dev_attr_ls_level.attr) {
> - supported = !acpi_check_handle(handle, METHOD_ALS_CONTROL,
> NULL) &&
> - !acpi_check_handle(handle, METHOD_ALS_LEVEL,
> NULL);
> + if (asus->have_pega_lucid) {
> + /* no ls_level interface on the Lucid */
> + supported = attr == &dev_attr_ls_switch.attr;
> + } else {
> + supported = !acpi_check_handle(handle,
> METHOD_ALS_CONTROL, NULL) &&
> + !acpi_check_handle(handle,
> METHOD_ALS_LEVEL, NULL);
> + }
> + } else if (attr == &dev_attr_ls_value.attr) {
> + supported = asus->have_pega_lucid;
> } else if (attr == &dev_attr_gps.attr) {
> supported = !acpi_check_handle(handle, METHOD_GPS_ON, NULL) &&
> !acpi_check_handle(handle, METHOD_GPS_OFF, NULL) &&
> @@ -1562,8 +1620,10 @@ static int __devinit asus_acpi_init(struct asus_laptop
> *asus)
> asus->light_switch = 0; /* Default to light sensor disabled */
> asus->light_level = 5; /* level 5 for sensor sensitivity */
>
> - if (!acpi_check_handle(asus->handle, METHOD_ALS_CONTROL, NULL) &&
> - !acpi_check_handle(asus->handle, METHOD_ALS_LEVEL, NULL)) {
> + if (asus->have_pega_lucid) {
> + asus_als_switch(asus, asus->light_switch);
> + } else if (!acpi_check_handle(asus->handle, METHOD_ALS_CONTROL, NULL)
> &&
> + !acpi_check_handle(asus->handle, METHOD_ALS_LEVEL, NULL)) {
> asus_als_switch(asus, asus->light_switch);
> asus_als_level(asus, asus->light_level);
> }
> --
> 1.7.1
>
>
--
Corentin Chary
http://xf.iksaif.net
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