diff options
| author | Istvan Varga <istvan_v@mailbox.hu> | 2011-06-04 12:03:03 -0300 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@redhat.com> | 2011-07-27 17:52:36 -0300 |
| commit | 5272f6b1f423d4ce636dc90f190e245897bdb045 (patch) | |
| tree | 09f3a634a8cf78c5d5b9e258dc9f650e336ccd04 | |
| parent | 0b4021321c0536a3368746497686ce56e5bcf3e5 (diff) | |
[media] xc4000: implemented power management
The following patch implements the xc4000_sleep() function.
The 'no_powerdown' module parameter is now interpreted differently:
- 0 uses a device-specific default
- 1 disables power management like before
- 2 enables power management
Signed-off-by: Istvan Varga <istvan_v@mailbox.hu>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
| -rw-r--r-- | drivers/media/common/tuners/xc4000.c | 39 |
1 files changed, 34 insertions, 5 deletions
diff --git a/drivers/media/common/tuners/xc4000.c b/drivers/media/common/tuners/xc4000.c index 0afb61f8eae..c373f4b36f5 100644 --- a/drivers/media/common/tuners/xc4000.c +++ b/drivers/media/common/tuners/xc4000.c @@ -43,9 +43,11 @@ MODULE_PARM_DESC(debug, "Turn on/off debugging (default:off)."); static int no_poweroff; module_param(no_poweroff, int, 0644); -MODULE_PARM_DESC(no_poweroff, "0 (default) powers device off when not used.\n" - "\t\t1 keep device energized and with tuner ready all the times.\n" - "\t\tFaster, but consumes more power and keeps the device hotter"); +MODULE_PARM_DESC(no_poweroff, "\n\t\t1: keep device energized and with tuner " + "ready all the times.\n" + "\t\tFaster, but consumes more power and keeps the device hotter.\n" + "\t\t2: powers device off when not used.\n" + "\t\t0 (default): use device-specific default mode."); #define XC4000_DEFAULT_FIRMWARE "xc4000.fw" @@ -102,6 +104,7 @@ struct xc4000_priv { /* Misc Defines */ #define MAX_TV_STANDARD 24 #define XC_MAX_I2C_WRITE_LENGTH 64 +#define XC_POWERED_DOWN 0x80000000U /* Signal Types */ #define XC_RF_MODE_AIR 0 @@ -1365,8 +1368,34 @@ static int xc4000_get_status(struct dvb_frontend *fe, u32 *status) static int xc4000_sleep(struct dvb_frontend *fe) { - /* FIXME: djh disable this for now... */ - return XC_RESULT_SUCCESS; + struct xc4000_priv *priv = fe->tuner_priv; + int ret = XC_RESULT_SUCCESS; + + dprintk(1, "%s()\n", __func__); + + mutex_lock(&priv->lock); + + /* Avoid firmware reload on slow devices */ + if ((no_poweroff == 2 || + (no_poweroff == 0 && + priv->card_type != XC4000_CARD_WINFAST_CX88)) && + (priv->cur_fw.type & BASE) != 0) { + /* force reset and firmware reload */ + priv->cur_fw.type = XC_POWERED_DOWN; + + if (xc_write_reg(priv, XREG_POWER_DOWN, 0) + != XC_RESULT_SUCCESS) { + printk(KERN_ERR + "xc4000: %s() unable to shutdown tuner\n", + __func__); + ret = -EREMOTEIO; + } + xc_wait(20); + } + + mutex_unlock(&priv->lock); + + return ret; } static int xc4000_init(struct dvb_frontend *fe) |