===================================================================
1. FAN Status/Control: you can now get the fan status (running or not) and
also set the fan speed (for <5 seconds only). The problem is that there
is an auto regulator that kicks in within about 5 seconds after that to
restart the fan if it is above a threshold temperature (39 Degree C in
my Vaio). It is useful just to get the fan status (primarily). It also
appears that you can change the speed by increasing the values (much
like the LCD control) - there are effectively only about 6 speeds (it
seems - not sure, but from what I've played with on my Vaio).
2. Temperature: you can get the current temperature (same as reported by
ACPI). This is primarily useful for APM users (since ACPI already gives
this). I have used this to detect when the fan comes on in my Vaio (39
Degree C).
From: Narayanan R S <[EMAIL PROTECTED]>
Signed-off-by: Stelian Pop <[EMAIL PROTECTED]>
===================================================================
drivers/char/sonypi.c | 32 ++++++++++++++++++++++++++++++++
include/linux/sonypi.h | 11 ++++++++++-
2 files changed, 42 insertions(+), 1 deletion(-)
===================================================================
Index: include/linux/sonypi.h
===================================================================
--- a/include/linux/sonypi.h (revision 26830)
+++ b/include/linux/sonypi.h (revision 26831)
@@ -1,8 +1,10 @@
/*
* Sony Programmable I/O Control Device driver for VAIO
*
- * Copyright (C) 2001-2004 Stelian Pop <[EMAIL PROTECTED]>
+ * Copyright (C) 2001-2005 Stelian Pop <[EMAIL PROTECTED]>
*
+ * Copyright (C) 2005 Narayanan R S <[EMAIL PROTECTED]>
+
* Copyright (C) 2001-2002 Alc�ve <www.alcove.com>
*
* Copyright (C) 2001 Michael Ashley <[EMAIL PROTECTED]>
@@ -118,6 +120,13 @@
#define SONYPI_IOCGBLUE _IOR('v', 8, __u8)
#define SONYPI_IOCSBLUE _IOW('v', 9, __u8)
+/* get/set fan state on/off */
+#define SONYPI_IOCGFAN _IOR('v', 10, __u8)
+#define SONYPI_IOCSFAN _IOW('v', 11, __u8)
+
+/* get temperature (C) */
+#define SONYPI_IOCGTEMP _IOR('v', 12, __u8)
+
#ifdef __KERNEL__
/* used only for communication between v4l and sonypi */
Index: drivers/char/sonypi.c
===================================================================
--- a/drivers/char/sonypi.c (revision 26830)
+++ b/drivers/char/sonypi.c (revision 26831)
@@ -3,6 +3,8 @@
*
* Copyright (C) 2001-2005 Stelian Pop <[EMAIL PROTECTED]>
*
+ * Copyright (C) 2005 Narayanan R S <[EMAIL PROTECTED]>
+ *
* Copyright (C) 2001-2002 Alc�ve <www.alcove.com>
*
* Copyright (C) 2001 Michael Ashley <[EMAIL PROTECTED]>
@@ -126,6 +128,10 @@ MODULE_PARM_DESC(useinput,
#define SONYPI_BAT2_MAXTK 0xb8
#define SONYPI_BAT2_FULL 0xba
+/* FAN0 information (reverse engineered from ACPI tables) */
+#define SONYPI_FAN0_STATUS 0x93
+#define SONYPI_TEMP_STATUS 0xC1
+
/* ioports used for brightness and type2 events */
#define SONYPI_DATA_IOPORT 0x62
#define SONYPI_CST_IOPORT 0x66
@@ -1009,6 +1015,32 @@ static int sonypi_misc_ioctl(struct inod
}
sonypi_setbluetoothpower(val8);
break;
+ /* FAN Controls */
+ case SONYPI_IOCGFAN:
+ if (sonypi_ec_read(SONYPI_FAN0_STATUS, &val8)) {
+ ret = -EIO;
+ break;
+ }
+ if (copy_to_user((u8 *)arg, &val8, sizeof(val8)))
+ ret = -EFAULT;
+ break;
+ case SONYPI_IOCSFAN:
+ if (copy_from_user(&val8, (u8 *)arg, sizeof(val8))) {
+ ret = -EFAULT;
+ break;
+ }
+ if (sonypi_ec_write(SONYPI_FAN0_STATUS, val8))
+ ret = -EIO;
+ break;
+ /* GET Temperature (useful under APM) */
+ case SONYPI_IOCGTEMP:
+ if (sonypi_ec_read(SONYPI_TEMP_STATUS, &val8)) {
+ ret = -EIO;
+ break;
+ }
+ if (copy_to_user((u8 *)arg, &val8, sizeof(val8)))
+ ret = -EFAULT;
+ break;
default:
ret = -EINVAL;
}
--
Stelian Pop <[EMAIL PROTECTED]>
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to [EMAIL PROTECTED]
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
