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V4L/DVB: cx88: Only start IR if the input device is opened

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Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Mauro Carvalho Chehab 2010-03-31 16:07:49 -03:00
parent 716aab44df
commit 92f4fc10d7
3 changed files with 66 additions and 15 deletions
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69
drivers/media/video/cx88/cx88-input.c
View File

@ -40,6 +40,10 @@ struct cx88_IR {
struct cx88_core *core;
struct input_dev *input;
struct ir_input_state ir;
struct ir_dev_props props;
int users;
char name[32];
char phys[32];
@ -161,8 +165,16 @@ static enum hrtimer_restart cx88_ir_work(struct hrtimer *timer)
return HRTIMER_RESTART;
}
void cx88_ir_start(struct cx88_core *core, struct cx88_IR *ir)
static int __cx88_ir_start(void *priv)
{
struct cx88_core *core = priv;
struct cx88_IR *ir;
if (!core || !core->ir)
return -EINVAL;
ir = core->ir;
if (ir->polling) {
hrtimer_init(&ir->timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL);
ir->timer.function = cx88_ir_work;
@ -175,10 +187,18 @@ void cx88_ir_start(struct cx88_core *core, struct cx88_IR *ir)
cx_write(MO_DDS_IO, 0xa80a80); /* 4 kHz sample rate */
cx_write(MO_DDSCFG_IO, 0x5); /* enable */
}
return 0;
}
void cx88_ir_stop(struct cx88_core *core, struct cx88_IR *ir)
static void __cx88_ir_stop(void *priv)
{
struct cx88_core *core = priv;
struct cx88_IR *ir;
if (!core || !core->ir)
return;
ir = core->ir;
if (ir->sampling) {
cx_write(MO_DDSCFG_IO, 0x0);
core->pci_irqmask &= ~PCI_INT_IR_SMPINT;
@ -188,6 +208,37 @@ void cx88_ir_stop(struct cx88_core *core, struct cx88_IR *ir)
hrtimer_cancel(&ir->timer);
}
int cx88_ir_start(struct cx88_core *core)
{
if (core->ir->users)
return __cx88_ir_start(core);
return 0;
}
void cx88_ir_stop(struct cx88_core *core)
{
if (core->ir->users)
__cx88_ir_stop(core);
}
static int cx88_ir_open(void *priv)
{
struct cx88_core *core = priv;
core->ir->users++;
return __cx88_ir_start(core);
}
static void cx88_ir_close(void *priv)
{
struct cx88_core *core = priv;
core->ir->users--;
if (!core->ir->users)
__cx88_ir_stop(core);
}
/* ---------------------------------------------------------------------- */
int cx88_ir_init(struct cx88_core *core, struct pci_dev *pci)
@ -383,19 +434,19 @@ int cx88_ir_init(struct cx88_core *core, struct pci_dev *pci)
ir->core = core;
core->ir = ir;
cx88_ir_start(core, ir);
ir->props.priv = core;
ir->props.open = cx88_ir_open;
ir->props.close = cx88_ir_close;
/* all done */
err = ir_input_register(ir->input, ir_codes, NULL, MODULE_NAME);
err = ir_input_register(ir->input, ir_codes, &ir->props, MODULE_NAME);
if (err)
goto err_out_stop;
goto err_out_free;
return 0;
err_out_stop:
cx88_ir_stop(core, ir);
core->ir = NULL;
err_out_free:
core->ir = NULL;
kfree(ir);
return err;
}
@ -408,7 +459,7 @@ int cx88_ir_fini(struct cx88_core *core)
if (NULL == ir)
return 0;
cx88_ir_stop(core, ir);
cx88_ir_stop(core);
ir_input_unregister(ir->input);
kfree(ir);

6
drivers/media/video/cx88/cx88-video.c
View File

@ -1977,7 +1977,7 @@ static void __devexit cx8800_finidev(struct pci_dev *pci_dev)
}
if (core->ir)
cx88_ir_stop(core, core->ir);
cx88_ir_stop(core);
cx88_shutdown(core); /* FIXME */
pci_disable_device(pci_dev);
@ -2015,7 +2015,7 @@ static int cx8800_suspend(struct pci_dev *pci_dev, pm_message_t state)
spin_unlock(&dev->slock);
if (core->ir)
cx88_ir_stop(core, core->ir);
cx88_ir_stop(core);
/* FIXME -- shutdown device */
cx88_shutdown(core);
@ -2056,7 +2056,7 @@ static int cx8800_resume(struct pci_dev *pci_dev)
/* FIXME: re-initialize hardware */
cx88_reset(core);
if (core->ir)
cx88_ir_start(core, core->ir);
cx88_ir_start(core);
cx_set(MO_PCI_INTMSK, core->pci_irqmask);

6
drivers/media/video/cx88/cx88.h
View File

@ -41,7 +41,7 @@
#include <linux/version.h>
#include <linux/mutex.h>
#define CX88_VERSION_CODE KERNEL_VERSION(0,0,7)
#define CX88_VERSION_CODE KERNEL_VERSION(0, 0, 8)
#define UNSET (-1U)
@ -683,8 +683,8 @@ s32 cx88_dsp_detect_stereo_sap(struct cx88_core *core);
int cx88_ir_init(struct cx88_core *core, struct pci_dev *pci);
int cx88_ir_fini(struct cx88_core *core);
void cx88_ir_irq(struct cx88_core *core);
void cx88_ir_start(struct cx88_core *core, struct cx88_IR *ir);
void cx88_ir_stop(struct cx88_core *core, struct cx88_IR *ir);
int cx88_ir_start(struct cx88_core *core);
void cx88_ir_stop(struct cx88_core *core);
/* ----------------------------------------------------------- */
/* cx88-mpeg.c */