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sony-laptop: add camera enable/disable parameter, better handle possible infinite loop

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Use a parameter to enable/disable motion eye camera (for C1VE/C1VN models)
controls and avoid entering an infinite loop if the camera is not present
and the HW doesn't answer as we expect on io commands.

Signed-off-by: Mattia Dongili <malattia@linux.it>
Signed-off-by: Len Brown <len.brown@intel.com>
This commit is contained in:
malattia@linux.it 2007-04-28 23:18:45 +09:00 committed by Len Brown
parent 7b153f3668
commit 5f3d2898d7
1 changed files with 36 additions and 15 deletions
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51
drivers/misc/sony-laptop.c
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@ -107,6 +107,12 @@ module_param(mask, ulong, 0644);
MODULE_PARM_DESC(mask,
"set this to the mask of event you want to enable (see doc)");
static int camera; /* = 0 */
module_param(camera, int, 0444);
MODULE_PARM_DESC(camera,
"set this to 1 to enable Motion Eye camera controls "
"(only use it if you have a C1VE or C1VN model)");
#ifdef CONFIG_SONY_LAPTOP_OLD
static int minor = -1;
module_param(minor, int, 0);
@ -1226,29 +1232,39 @@ static int sony_pic_camera_ready(void)
return (v != 0xff && (v & SONYPI_CAMERA_STATUS_READY));
}
static void sony_pic_camera_off(void)
static int sony_pic_camera_off(void)
{
if (!camera) {
printk(KERN_WARNING DRV_PFX "camera control not enabled\n");
return -ENODEV;
}
wait_on_command(sony_pic_call3(0x90, SONYPI_CAMERA_PICTURE,
SONYPI_CAMERA_MUTE_MASK),
ITERATIONS_SHORT);
if (!spic_dev.camera_power)
return;
sony_pic_call2(0x91, 0);
spic_dev.camera_power = 0;
if (spic_dev.camera_power) {
sony_pic_call2(0x91, 0);
spic_dev.camera_power = 0;
}
return 0;
}
static void sony_pic_camera_on(void)
static int sony_pic_camera_on(void)
{
int i, j;
int i, j, x;
if (!camera) {
printk(KERN_WARNING DRV_PFX "camera control not enabled\n");
return -ENODEV;
}
if (spic_dev.camera_power)
return;
return 0;
for (j = 5; j > 0; j--) {
while (sony_pic_call2(0x91, 0x1))
for (x = 0; x < 100 && sony_pic_call2(0x91, 0x1); x++)
msleep(10);
sony_pic_call1(0x93);
@ -1262,8 +1278,8 @@ static void sony_pic_camera_on(void)
}
if (j == 0) {
printk(KERN_WARNING "sonypi: failed to power on camera\n");
return;
printk(KERN_WARNING DRV_PFX "failed to power on camera\n");
return -ENODEV;
}
wait_on_command(sony_pic_call3(0x90, SONYPI_CAMERA_CONTROL,
@ -1271,6 +1287,7 @@ static void sony_pic_camera_on(void)
ITERATIONS_SHORT);
spic_dev.camera_power = 1;
return 0;
}
static ssize_t sony_pic_camerapower_store(struct device *dev,
@ -1278,14 +1295,18 @@ static ssize_t sony_pic_camerapower_store(struct device *dev,
const char *buffer, size_t count)
{
unsigned long value;
int result;
if (count > 31)
return -EINVAL;
value = simple_strtoul(buffer, NULL, 10);
if (value)
sony_pic_camera_on();
result = sony_pic_camera_on();
else
sony_pic_camera_off();
result = sony_pic_camera_off();
if (result)
return result;
return count;
}
@ -1662,7 +1683,7 @@ static int sonypi_compat_init(void)
goto err_free_kfifo;
}
if (minor == -1)
printk(KERN_INFO "sonypi: device allocated minor is %d\n",
printk(KERN_INFO DRV_PFX "device allocated minor is %d\n",
sonypi_misc_device.minor);
return 0;