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[media] rtl28xxu: masked reg write 

Implement masked register write and use it.

Signed-off-by: Antti Palosaari <crope@iki.fi>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Antti Palosaari 2012-09-17 15:43:57 -03:00 committed by Mauro Carvalho Chehab
parent ef37be1b4d
commit 4005c1a9f6
1 changed files with 36 additions and 47 deletions
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83
drivers/media/usb/dvb-usb-v2/rtl28xxu.c
View File

@ -130,6 +130,26 @@ static int rtl28xx_rd_reg(struct dvb_usb_device *d, u16 reg, u8 *val)
return rtl2831_rd_regs(d, reg, val, 1);
}
static int rtl28xx_wr_reg_mask(struct dvb_usb_device *d, u16 reg, u8 val,
u8 mask)
{
int ret;
u8 tmp;
/* no need for read if whole reg is written */
if (mask != 0xff) {
ret = rtl28xx_rd_reg(d, reg, &tmp);
if (ret)
return ret;
val &= mask;
tmp &= ~mask;
val |= tmp;
}
return rtl28xx_wr_reg(d, reg, val);
}
/* I2C */
static int rtl28xxu_i2c_xfer(struct i2c_adapter *adap, struct i2c_msg msg[],
int num)
@ -258,7 +278,7 @@ static int rtl2832u_read_config(struct dvb_usb_device *d)
{
struct rtl28xxu_priv *priv = d_to_priv(d);
int ret;
u8 buf[2], val;
u8 buf[2];
/* open RTL2832U/RTL2832 I2C gate */
struct rtl28xxu_req req_gate_open = {0x0120, 0x0011, 0x0001, "\x18"};
/* close RTL2832U/RTL2832 I2C gate */
@ -277,24 +297,12 @@ static int rtl2832u_read_config(struct dvb_usb_device *d)
dev_dbg(&d->udev->dev, "%s:\n", __func__);
ret = rtl28xx_rd_reg(d, SYS_GPIO_DIR, &val);
/* enable GPIO3 and GPIO6 as output */
ret = rtl28xx_wr_reg_mask(d, SYS_GPIO_DIR, 0x00, 0x40);
if (ret)
goto err;
val &= 0xbf;
ret = rtl28xx_wr_reg(d, SYS_GPIO_DIR, val);
if (ret)
goto err;
/* enable as output GPIO3 and GPIO6 */
ret = rtl28xx_rd_reg(d, SYS_GPIO_OUT_EN, &val);
if (ret)
goto err;
val |= 0x48;
ret = rtl28xx_wr_reg(d, SYS_GPIO_OUT_EN, val);
ret = rtl28xx_wr_reg_mask(d, SYS_GPIO_OUT_EN, 0x48, 0x48);
if (ret)
goto err;
@ -611,29 +619,25 @@ static int rtl2832u_tua9001_tuner_callback(struct dvb_usb_device *d,
* RXEN GPIO1
*/
ret = rtl28xx_rd_reg(d, SYS_GPIO_OUT_VAL, &val);
if (ret < 0)
goto err;
switch (cmd) {
case TUA9001_CMD_RESETN:
if (arg)
val |= (1 << 4);
val = (1 << 4);
else
val &= ~(1 << 4);
val = (0 << 4);
ret = rtl28xx_wr_reg(d, SYS_GPIO_OUT_VAL, val);
if (ret < 0)
ret = rtl28xx_wr_reg_mask(d, SYS_GPIO_OUT_VAL, val, 0x10);
if (ret)
goto err;
break;
case TUA9001_CMD_RXEN:
if (arg)
val |= (1 << 1);
val = (1 << 1);
else
val &= ~(1 << 1);
val = (0 << 1);
ret = rtl28xx_wr_reg(d, SYS_GPIO_OUT_VAL, val);
if (ret < 0)
ret = rtl28xx_wr_reg_mask(d, SYS_GPIO_OUT_VAL, val, 0x02);
if (ret)
goto err;
break;
}
@ -821,7 +825,6 @@ static int rtl2832u_tuner_attach(struct dvb_usb_adapter *adap)
struct dvb_usb_device *d = adap_to_d(adap);
struct rtl28xxu_priv *priv = d_to_priv(d);
struct dvb_frontend *fe;
u8 val;
dev_dbg(&d->udev->dev, "%s:\n", __func__);
@ -854,26 +857,12 @@ static int rtl2832u_tuner_attach(struct dvb_usb_adapter *adap)
break;
case TUNER_RTL2832_TUA9001:
/* enable GPIO1 and GPIO4 as output */
ret = rtl28xx_rd_reg(d, SYS_GPIO_DIR, &val);
if (ret < 0)
ret = rtl28xx_wr_reg_mask(d, SYS_GPIO_DIR, 0x00, 0x12);
if (ret)
goto err;
val &= ~(1 << 1);
val &= ~(1 << 4);
ret = rtl28xx_wr_reg(d, SYS_GPIO_DIR, val);
if (ret < 0)
goto err;
ret = rtl28xx_rd_reg(d, SYS_GPIO_OUT_EN, &val);
if (ret < 0)
goto err;
val |= (1 << 1);
val |= (1 << 4);
ret = rtl28xx_wr_reg(d, SYS_GPIO_OUT_EN, val);
if (ret < 0)
ret = rtl28xx_wr_reg_mask(d, SYS_GPIO_OUT_EN, 0x12, 0x12);
if (ret)
goto err;
fe = dvb_attach(tua9001_attach, adap->fe[0], &d->i2c_adap,