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V4L/DVB (11793): xc5000: Properly support power down for newer firmware 

Xceive got rid of the XREG_POWER_DOWN register in later firmware revisions.
Their technical support informed me that the correct way to put the tuner
to sleep is to pull the reset pin (but don't reload the firmware).

Signed-off-by: Devin Heitmueller <dheitmueller@kernellabs.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Devin Heitmueller 2009-04-02 22:02:39 -03:00 committed by Mauro Carvalho Chehab
parent 361d4892cd
commit 7f05b530be
1 changed files with 5 additions and 3 deletions
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8
drivers/media/common/tuners/xc5000.c
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@ -83,7 +83,7 @@ struct xc5000_priv {
#define XREG_D_CODE 0x04 #define XREG_D_CODE 0x04
#define XREG_IF_OUT 0x05 #define XREG_IF_OUT 0x05
#define XREG_SEEK_MODE 0x07 #define XREG_SEEK_MODE 0x07
#define XREG_POWER_DOWN 0x0A #define XREG_POWER_DOWN 0x0A /* Obsolete */
#define XREG_SIGNALSOURCE 0x0D /* 0=Air, 1=Cable */ #define XREG_SIGNALSOURCE 0x0D /* 0=Air, 1=Cable */
#define XREG_SMOOTHEDCVBS 0x0E #define XREG_SMOOTHEDCVBS 0x0E
#define XREG_XTALFREQ 0x0F #define XREG_XTALFREQ 0x0F
@ -841,12 +841,14 @@ static int xc_load_fw_and_init_tuner(struct dvb_frontend *fe)
static int xc5000_sleep(struct dvb_frontend *fe) static int xc5000_sleep(struct dvb_frontend *fe)
{ {
struct xc5000_priv *priv = fe->tuner_priv;
int ret; int ret;
dprintk(1, "%s()\n", __func__); dprintk(1, "%s()\n", __func__);
ret = xc_write_reg(priv, XREG_POWER_DOWN, 0); /* According to Xceive technical support, the "powerdown" register
was removed in newer versions of the firmware. The "supported"
way to sleep the tuner is to pull the reset pin low for 10ms */
ret = xc5000_TunerReset(fe);
if (ret != XC_RESULT_SUCCESS) { if (ret != XC_RESULT_SUCCESS) {
printk(KERN_ERR printk(KERN_ERR
"xc5000: %s() unable to shutdown tuner\n", "xc5000: %s() unable to shutdown tuner\n",