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V4L/DVB (8097): xc5000: check device hardware state to determine if firmware download is needed 

This patch ensures that the xc5000 will have firmware loaded as needed if the
part is powered down or reset via gpio from the host. An example of this, in
some cases, could be after the system resumes from standby or hibernate modes.

Signed-off-by: Michael Krufky <mkrufky@linuxtv.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
This commit is contained in:
Steven Toth 2008-06-21 21:06:02 -03:00 committed by Mauro Carvalho Chehab
parent 836c28584d
commit e470d8177e
2 changed files with 23 additions and 8 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

30
drivers/media/common/tuners/xc5000.c
View File

@ -177,6 +177,7 @@ static XC_TV_STANDARD XC5000_Standard[MAX_TV_STANDARD] = {
{"FM Radio-INPUT1", 0x0208, 0x9002}
};
static int xc5000_is_firmware_loaded(struct dvb_frontend *fe);
static int xc5000_writeregs(struct xc5000_priv *priv, u8 *buf, u8 len);
static int xc5000_readregs(struct xc5000_priv *priv, u8 *buf, u8 len);
static void xc5000_TunerReset(struct dvb_frontend *fe);
@ -352,7 +353,7 @@ static int xc_SetTVStandard(struct xc5000_priv *priv,
static int xc_shutdown(struct xc5000_priv *priv)
{
return 0;
return XC_RESULT_SUCCESS;
/* Fixme: cannot bring tuner back alive once shutdown
* without reloading the driver modules.
* return xc_write_reg(priv, XREG_POWER_DOWN, 0);
@ -685,6 +686,25 @@ static int xc5000_set_params(struct dvb_frontend *fe,
return 0;
}
static int xc5000_is_firmware_loaded(struct dvb_frontend *fe)
{
struct xc5000_priv *priv = fe->tuner_priv;
int ret;
u16 id;
ret = xc5000_readreg(priv, XREG_PRODUCT_ID, &id);
if (ret == XC_RESULT_SUCCESS) {
if (id == XC_PRODUCT_ID_FW_NOT_LOADED)
ret = XC_RESULT_RESET_FAILURE;
else
ret = XC_RESULT_SUCCESS;
}
dprintk(1, "%s() returns %s id = 0x%x\n", __func__,
ret == XC_RESULT_SUCCESS ? "True" : "False", id);
return ret;
}
static int xc_load_fw_and_init_tuner(struct dvb_frontend *fe);
static int xc5000_set_analog_params(struct dvb_frontend *fe,
@ -693,7 +713,7 @@ static int xc5000_set_analog_params(struct dvb_frontend *fe,
struct xc5000_priv *priv = fe->tuner_priv;
int ret;
if(priv->fwloaded == 0)
if (xc5000_is_firmware_loaded(fe) != XC_RESULT_SUCCESS)
xc_load_fw_and_init_tuner(fe);
dprintk(1, "%s() frequency=%d (in units of 62.5khz)\n",
@ -808,11 +828,10 @@ static int xc_load_fw_and_init_tuner(struct dvb_frontend *fe)
struct xc5000_priv *priv = fe->tuner_priv;
int ret = 0;
if (priv->fwloaded == 0) {
if (xc5000_is_firmware_loaded(fe) != XC_RESULT_SUCCESS) {
ret = xc5000_fwupload(fe);
if (ret != XC_RESULT_SUCCESS)
return ret;
priv->fwloaded = 1;
}
/* Start the tuner self-calibration process */
@ -852,7 +871,6 @@ static int xc5000_sleep(struct dvb_frontend *fe)
return -EREMOTEIO;
}
else {
/* priv->fwloaded = 0; */
return XC_RESULT_SUCCESS;
}
}
@ -933,7 +951,6 @@ struct dvb_frontend *xc5000_attach(struct dvb_frontend *fe,
cfg->i2c_address);
printk(KERN_INFO
"xc5000: Firmware has been loaded previously\n");
priv->fwloaded = 1;
break;
case XC_PRODUCT_ID_FW_NOT_LOADED:
printk(KERN_INFO
@ -941,7 +958,6 @@ struct dvb_frontend *xc5000_attach(struct dvb_frontend *fe,
cfg->i2c_address);
printk(KERN_INFO
"xc5000: Firmware has not been loaded previously\n");
priv->fwloaded = 0;
break;
default:
printk(KERN_ERR

1
drivers/media/common/tuners/xc5000_priv.h
View File

@ -30,7 +30,6 @@ struct xc5000_priv {
u32 bandwidth;
u8 video_standard;
u8 rf_mode;
u8 fwloaded;
void *devptr;
};