* [PATCH] sonypi: return an error from sonypi_camera_command() if the camera isn't enabled
@ 2004-11-16 21:47 Stelian Pop
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From: Stelian Pop @ 2004-11-16 21:47 UTC (permalink / raw)
To: Linux Kernel Mailing List; +Cc: Andrew Morton, Linus Torvalds
The sonypi_camera_command() used to fail without returning an error
code if the user fergot to enable the camera in the sonypi module
(using the camera=1 module parameter). This caused the meye driver
to apparently load correctly but miserably fail later, when trying
to access the camera for getting some data out of it.
This patch adds an error code to sonypi_camera_command() and makes
the meye driver check for it in the PCI probe routine. If the function
fails, a message is printed in the kernel logs reminding the user it
should better RTFM.
The patch also removes some sonypi_camera_command() commands (those
supposed to return the current camera settings) which are unreliable.
The meye driver does not use them anyway.
Please apply.
Signed-off-by: Stelian Pop <stelian@popies.net>
===================================================================
drivers/char/sonypi.c | 47 ++++++++-------------------------------------
drivers/char/sonypi.h | 2 -
drivers/media/video/meye.c | 8 ++++++-
drivers/media/video/meye.h | 2 -
include/linux/sonypi.h | 24 +++++++++++-----------
5 files changed, 30 insertions(+), 53 deletions(-)
===================================================================
diff -Nru a/drivers/char/sonypi.c b/drivers/char/sonypi.c
--- a/drivers/char/sonypi.c 2004-11-16 20:41:10 +01:00
+++ b/drivers/char/sonypi.c 2004-11-16 20:41:10 +01:00
@@ -232,6 +232,8 @@
return v1;
}
+#if 0
+/* Get brightness, hue etc. Unreliable... */
static u8 sonypi_read(u8 fn)
{
u8 v1, v2;
@@ -245,6 +247,7 @@
}
return 0xff;
}
+#endif
/* Set brightness, hue etc */
static void sonypi_set(u8 fn, u8 v)
@@ -435,80 +438,48 @@
}
/* External camera command (exported to the motion eye v4l driver) */
-u8 sonypi_camera_command(int command, u8 value)
+int sonypi_camera_command(int command, u8 value)
{
- u8 ret = 0;
-
if (!camera)
- return 0;
+ return -EIO;
down(&sonypi_device.lock);
switch (command) {
- case SONYPI_COMMAND_GETCAMERA:
- ret = sonypi_camera_ready();
- break;
case SONYPI_COMMAND_SETCAMERA:
if (value)
sonypi_camera_on();
else
sonypi_camera_off();
break;
- case SONYPI_COMMAND_GETCAMERABRIGHTNESS:
- ret = sonypi_read(SONYPI_CAMERA_BRIGHTNESS);
- break;
case SONYPI_COMMAND_SETCAMERABRIGHTNESS:
sonypi_set(SONYPI_CAMERA_BRIGHTNESS, value);
break;
- case SONYPI_COMMAND_GETCAMERACONTRAST:
- ret = sonypi_read(SONYPI_CAMERA_CONTRAST);
- break;
case SONYPI_COMMAND_SETCAMERACONTRAST:
sonypi_set(SONYPI_CAMERA_CONTRAST, value);
break;
- case SONYPI_COMMAND_GETCAMERAHUE:
- ret = sonypi_read(SONYPI_CAMERA_HUE);
- break;
case SONYPI_COMMAND_SETCAMERAHUE:
sonypi_set(SONYPI_CAMERA_HUE, value);
break;
- case SONYPI_COMMAND_GETCAMERACOLOR:
- ret = sonypi_read(SONYPI_CAMERA_COLOR);
- break;
case SONYPI_COMMAND_SETCAMERACOLOR:
sonypi_set(SONYPI_CAMERA_COLOR, value);
break;
- case SONYPI_COMMAND_GETCAMERASHARPNESS:
- ret = sonypi_read(SONYPI_CAMERA_SHARPNESS);
- break;
case SONYPI_COMMAND_SETCAMERASHARPNESS:
sonypi_set(SONYPI_CAMERA_SHARPNESS, value);
break;
- case SONYPI_COMMAND_GETCAMERAPICTURE:
- ret = sonypi_read(SONYPI_CAMERA_PICTURE);
- break;
case SONYPI_COMMAND_SETCAMERAPICTURE:
sonypi_set(SONYPI_CAMERA_PICTURE, value);
break;
- case SONYPI_COMMAND_GETCAMERAAGC:
- ret = sonypi_read(SONYPI_CAMERA_AGC);
- break;
case SONYPI_COMMAND_SETCAMERAAGC:
sonypi_set(SONYPI_CAMERA_AGC, value);
break;
- case SONYPI_COMMAND_GETCAMERADIRECTION:
- ret = sonypi_read(SONYPI_CAMERA_STATUS);
- ret &= SONYPI_DIRECTION_BACKWARDS;
- break;
- case SONYPI_COMMAND_GETCAMERAROMVERSION:
- ret = sonypi_read(SONYPI_CAMERA_ROMVERSION);
- break;
- case SONYPI_COMMAND_GETCAMERAREVISION:
- ret = sonypi_read(SONYPI_CAMERA_REVISION);
+ default:
+ printk(KERN_ERR "sonypi: sonypi_camera_command invalid: %d\n",
+ command);
break;
}
up(&sonypi_device.lock);
- return ret;
+ return 0;
}
EXPORT_SYMBOL(sonypi_camera_command);
diff -Nru a/drivers/char/sonypi.h b/drivers/char/sonypi.h
--- a/drivers/char/sonypi.h 2004-11-16 20:41:10 +01:00
+++ b/drivers/char/sonypi.h 2004-11-16 20:41:10 +01:00
@@ -36,7 +36,7 @@
#ifdef __KERNEL__
-#define SONYPI_DRIVER_VERSION "1.24"
+#define SONYPI_DRIVER_VERSION "1.25"
#define SONYPI_DEVICE_MODEL_TYPE1 1
#define SONYPI_DEVICE_MODEL_TYPE2 2
diff -Nru a/drivers/media/video/meye.c b/drivers/media/video/meye.c
--- a/drivers/media/video/meye.c 2004-11-16 20:41:10 +01:00
+++ b/drivers/media/video/meye.c 2004-11-16 20:41:10 +01:00
@@ -1842,7 +1842,12 @@
memcpy(meye.video_dev, &meye_template, sizeof(meye_template));
meye.video_dev->dev = &meye.mchip_dev->dev;
- sonypi_camera_command(SONYPI_COMMAND_SETCAMERA, 1);
+ if ((ret = sonypi_camera_command(SONYPI_COMMAND_SETCAMERA, 1))) {
+ printk(KERN_ERR "meye: unable to power on the camera\n");
+ printk(KERN_ERR "meye: did you enable the camera in "
+ "sonypi using the module options ?\n");
+ goto outsonypienable;
+ }
ret = -EIO;
if ((ret = pci_enable_device(meye.mchip_dev))) {
@@ -1943,6 +1948,7 @@
pci_disable_device(meye.mchip_dev);
outenabledev:
sonypi_camera_command(SONYPI_COMMAND_SETCAMERA, 0);
+outsonypienable:
kfifo_free(meye.doneq);
outkfifoalloc2:
kfifo_free(meye.grabq);
diff -Nru a/drivers/media/video/meye.h b/drivers/media/video/meye.h
--- a/drivers/media/video/meye.h 2004-11-16 20:41:10 +01:00
+++ b/drivers/media/video/meye.h 2004-11-16 20:41:10 +01:00
@@ -31,7 +31,7 @@
#define _MEYE_PRIV_H_
#define MEYE_DRIVER_MAJORVERSION 1
-#define MEYE_DRIVER_MINORVERSION 11
+#define MEYE_DRIVER_MINORVERSION 12
#define MEYE_DRIVER_VERSION __stringify(MEYE_DRIVER_MAJORVERSION) "." \
__stringify(MEYE_DRIVER_MINORVERSION)
diff -Nru a/include/linux/sonypi.h b/include/linux/sonypi.h
--- a/include/linux/sonypi.h 2004-11-16 20:41:10 +01:00
+++ b/include/linux/sonypi.h 2004-11-16 20:41:10 +01:00
@@ -122,27 +122,27 @@
/* used only for communication between v4l and sonypi */
-#define SONYPI_COMMAND_GETCAMERA 1
+#define SONYPI_COMMAND_GETCAMERA 1 /* obsolete */
#define SONYPI_COMMAND_SETCAMERA 2
-#define SONYPI_COMMAND_GETCAMERABRIGHTNESS 3
+#define SONYPI_COMMAND_GETCAMERABRIGHTNESS 3 /* obsolete */
#define SONYPI_COMMAND_SETCAMERABRIGHTNESS 4
-#define SONYPI_COMMAND_GETCAMERACONTRAST 5
+#define SONYPI_COMMAND_GETCAMERACONTRAST 5 /* obsolete */
#define SONYPI_COMMAND_SETCAMERACONTRAST 6
-#define SONYPI_COMMAND_GETCAMERAHUE 7
+#define SONYPI_COMMAND_GETCAMERAHUE 7 /* obsolete */
#define SONYPI_COMMAND_SETCAMERAHUE 8
-#define SONYPI_COMMAND_GETCAMERACOLOR 9
+#define SONYPI_COMMAND_GETCAMERACOLOR 9 /* obsolete */
#define SONYPI_COMMAND_SETCAMERACOLOR 10
-#define SONYPI_COMMAND_GETCAMERASHARPNESS 11
+#define SONYPI_COMMAND_GETCAMERASHARPNESS 11 /* obsolete */
#define SONYPI_COMMAND_SETCAMERASHARPNESS 12
-#define SONYPI_COMMAND_GETCAMERAPICTURE 13
+#define SONYPI_COMMAND_GETCAMERAPICTURE 13 /* obsolete */
#define SONYPI_COMMAND_SETCAMERAPICTURE 14
-#define SONYPI_COMMAND_GETCAMERAAGC 15
+#define SONYPI_COMMAND_GETCAMERAAGC 15 /* obsolete */
#define SONYPI_COMMAND_SETCAMERAAGC 16
-#define SONYPI_COMMAND_GETCAMERADIRECTION 17
-#define SONYPI_COMMAND_GETCAMERAROMVERSION 18
-#define SONYPI_COMMAND_GETCAMERAREVISION 19
+#define SONYPI_COMMAND_GETCAMERADIRECTION 17 /* obsolete */
+#define SONYPI_COMMAND_GETCAMERAROMVERSION 18 /* obsolete */
+#define SONYPI_COMMAND_GETCAMERAREVISION 19 /* obsolete */
-u8 sonypi_camera_command(int command, u8 value);
+int sonypi_camera_command(int command, u8 value);
#endif /* __KERNEL__ */
--
Stelian Pop <stelian@popies.net>
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