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[media] em28xx: implement FE set_lna() callback 

Make LNA run-time switching possible for PCTV nanoStick T2 290e!

Signed-off-by: Antti Palosaari <crope@iki.fi>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Antti Palosaari 2012-07-19 22:28:56 -03:00 committed by Mauro Carvalho Chehab
parent aa3c598b00
commit 13a5336e88
1 changed files with 36 additions and 5 deletions
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41
drivers/media/usb/em28xx/em28xx-dvb.c
View File

@ -81,6 +81,7 @@ struct em28xx_dvb {
int (*gate_ctrl)(struct dvb_frontend *, int);
struct semaphore pll_mutex;
bool dont_attach_fe1;
int lna_gpio;
};
@ -568,6 +569,33 @@ static void pctv_520e_init(struct em28xx *dev)
i2c_master_send(&dev->i2c_client, regs[i].r, regs[i].len);
};
static int em28xx_pctv_290e_set_lna(struct dvb_frontend *fe, int val)
{
struct em28xx *dev = fe->dvb->priv;
#ifdef CONFIG_GPIOLIB
struct em28xx_dvb *dvb = dev->dvb;
int ret;
unsigned long flags;
if (val)
flags = GPIOF_OUT_INIT_LOW;
else
flags = GPIOF_OUT_INIT_HIGH;
ret = gpio_request_one(dvb->lna_gpio, flags, NULL);
if (ret)
em28xx_errdev("gpio request failed %d\n", ret);
else
gpio_free(dvb->lna_gpio);
return ret;
#else
dev_warn(&dev->udev->dev, "%s: LNA control is disabled\n",
KBUILD_MODNAME);
return 0;
#endif
}
static int em28xx_mt352_terratec_xs_init(struct dvb_frontend *fe)
{
/* Values extracted from a USB trace of the Terratec Windows driver */
@ -809,7 +837,7 @@ static void em28xx_unregister_dvb(struct em28xx_dvb *dvb)
static int em28xx_dvb_init(struct em28xx *dev)
{
int result = 0, mfe_shared = 0, gpio_chip_base;
int result = 0, mfe_shared = 0;
struct em28xx_dvb *dvb;
if (!dev->board.has_dvb) {
@ -958,7 +986,7 @@ static int em28xx_dvb_init(struct em28xx *dev)
dvb->fe[0] = dvb_attach(cxd2820r_attach,
&em28xx_cxd2820r_config,
&dev->i2c_adap,
&gpio_chip_base);
&dvb->lna_gpio);
if (dvb->fe[0]) {
/* FE 0 attach tuner */
if (!dvb_attach(tda18271_attach,
@ -973,15 +1001,18 @@ static int em28xx_dvb_init(struct em28xx *dev)
}
}
#ifdef CONFIG_GPIOLIB
/* enable LNA for DVB-T, DVB-T2 and DVB-C */
result = gpio_request_one(gpio_chip_base, GPIOF_INIT_LOW,
"LNA");
result = gpio_request_one(dvb->lna_gpio, GPIOF_OUT_INIT_LOW,
NULL);
if (result)
em28xx_errdev("gpio request failed %d\n", result);
else
gpio_free(gpio_chip_base);
gpio_free(dvb->lna_gpio);
result = 0; /* continue even set LNA fails */
#endif
dvb->fe[0]->ops.set_lna = em28xx_pctv_290e_set_lna;
break;
case EM2884_BOARD_HAUPPAUGE_WINTV_HVR_930C:
{