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Date: Fri, 14 Oct 2011 11:13:36 +0200
From: Corentin Chary <corentincj@...aif.net>
To: Matthew Garrett <mjg@...hat.com>
Cc: Anisse Astier <anisse@...ier.eu>,
acpi4asus-user@...ts.sourceforge.net,
platform-driver-x86@...r.kernel.org, linux-kernel@...r.kernel.org,
Andy Ross <andy.ross@...driver.com>,
Corentin Chary <corentin.chary@...il.com>
Subject: [PATCH 2/8] asus-laptop: Pegatron Lucid ALS sensor
From: Andy Ross <andy.ross@...driver.com>
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 <andy.ross@...driver.com>
Signed-off-by: Corentin Chary <corentin.chary@...il.com>
---
drivers/platform/x86/asus-laptop.c | 80 +++++++++++++++++++++++++++++++++--
1 files changed, 75 insertions(+), 5 deletions(-)
diff --git a/drivers/platform/x86/asus-laptop.c b/drivers/platform/x86/asus-laptop.c
index c08f4c2..afed9ff 100644
--- a/drivers/platform/x86/asus-laptop.c
+++ b/drivers/platform/x86/asus-laptop.c
@@ -177,9 +177,15 @@ MODULE_PARM_DESC(wwan_status, "Set the wireless status on boot "
/* 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
@@ -340,6 +346,12 @@ 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)
@@ -924,8 +936,18 @@ 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))
- pr_warn("Error setting light sensor switch\n");
+ int ret;
+
+ if (asus->is_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;
}
@@ -981,6 +1003,35 @@ 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;
+ 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
*/
@@ -1169,6 +1220,7 @@ 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_IWUSR, NULL, store_disp);
static DEVICE_ATTR(ledd, S_IRUGO | S_IWUSR, show_ledd, store_ledd);
+static DEVICE_ATTR(ls_value, S_IRUGO, show_lsvalue, NULL);
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);
@@ -1181,6 +1233,7 @@ 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,
@@ -1197,6 +1250,19 @@ static mode_t asus_sysfs_is_visible(struct kobject *kobj,
acpi_handle handle = asus->handle;
bool supported;
+ if (asus->is_pega_lucid) {
+ /* no ls_level interface on the Lucid */
+ if (attr == &dev_attr_ls_switch.attr)
+ supported = true;
+ else if (attr == &dev_attr_ls_level.attr)
+ supported = false;
+ else
+ goto normal;
+
+ return supported;
+ }
+
+normal:
if (attr == &dev_attr_wlan.attr) {
supported = !acpi_check_handle(handle, METHOD_WLAN, NULL);
@@ -1219,7 +1285,9 @@ 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);
+ !acpi_check_handle(handle, METHOD_ALS_LEVEL, NULL);
+ } else if (attr == &dev_attr_ls_value.attr) {
+ supported = asus->is_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) &&
@@ -1407,8 +1475,10 @@ 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->is_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);
}
--
1.7.3.4
--
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