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| author | Dmitri Belimov <d.belimov@gmail.com> | 2010-05-18 11:30:11 +0400 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@redhat.com> | 2010-08-02 22:29:10 +0400 |
| commit | 4743319fb0d2a808a5e3eeb778a9666daf9da51d (patch) | |
| tree | 048fe72e763e67cefbf6002cae3d94586a523792 /drivers/media/common/tuners/xc5000.c | |
| parent | e252984c5279dde24fbd6d3efe7fe13dc642e714 (diff) | |
| download | linux-4743319fb0d2a808a5e3eeb778a9666daf9da51d.tar.xz | |
V4L/DVB: xc5000, rework xc_write_reg
Rework xc_write_reg function for correct read register of the xc5000.
It is very useful for tm6000.
Tested for tm6000 and for saa7134 works well.
Signed-off-by: Beholder Intl. Ltd. Dmitry Belimov <d.belimov@gmail.com>
Acked-by: Devin Heitmueller <dheitmueller@kernellabs.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Diffstat (limited to 'drivers/media/common/tuners/xc5000.c')
| -rw-r--r-- | drivers/media/common/tuners/xc5000.c | 57 |
1 files changed, 26 insertions, 31 deletions
diff --git a/drivers/media/common/tuners/xc5000.c b/drivers/media/common/tuners/xc5000.c index 432003dded7c..215dad07f060 100644 --- a/drivers/media/common/tuners/xc5000.c +++ b/drivers/media/common/tuners/xc5000.c @@ -232,6 +232,26 @@ static int xc_read_i2c_data(struct xc5000_priv *priv, u8 *buf, int len) return 0; } +static int xc5000_readreg(struct xc5000_priv *priv, u16 reg, u16 *val) +{ + u8 buf[2] = { reg >> 8, reg & 0xff }; + u8 bval[2] = { 0, 0 }; + struct i2c_msg msg[2] = { + { .addr = priv->i2c_props.addr, + .flags = 0, .buf = &buf[0], .len = 2 }, + { .addr = priv->i2c_props.addr, + .flags = I2C_M_RD, .buf = &bval[0], .len = 2 }, + }; + + if (i2c_transfer(priv->i2c_props.adap, msg, 2) != 2) { + printk(KERN_WARNING "xc5000: I2C read failed\n"); + return -EREMOTEIO; + } + + *val = (bval[0] << 8) | bval[1]; + return XC_RESULT_SUCCESS; +} + static void xc_wait(int wait_ms) { msleep(wait_ms); @@ -275,20 +295,14 @@ static int xc_write_reg(struct xc5000_priv *priv, u16 regAddr, u16 i2cData) if (result == XC_RESULT_SUCCESS) { /* wait for busy flag to clear */ while ((WatchDogTimer > 0) && (result == XC_RESULT_SUCCESS)) { - buf[0] = 0; - buf[1] = XREG_BUSY; - - result = xc_send_i2c_data(priv, buf, 2); + result = xc5000_readreg(priv, XREG_BUSY, buf); if (result == XC_RESULT_SUCCESS) { - result = xc_read_i2c_data(priv, buf, 2); - if (result == XC_RESULT_SUCCESS) { - if ((buf[0] == 0) && (buf[1] == 0)) { - /* busy flag cleared */ + if ((buf[0] == 0) && (buf[1] == 0)) { + /* busy flag cleared */ break; - } else { - xc_wait(5); /* wait 5 ms */ - WatchDogTimer--; - } + } else { + xc_wait(5); /* wait 5 ms */ + WatchDogTimer--; } } } @@ -526,25 +540,6 @@ static int xc_tune_channel(struct xc5000_priv *priv, u32 freq_hz, int mode) return found; } -static int xc5000_readreg(struct xc5000_priv *priv, u16 reg, u16 *val) -{ - u8 buf[2] = { reg >> 8, reg & 0xff }; - u8 bval[2] = { 0, 0 }; - struct i2c_msg msg[2] = { - { .addr = priv->i2c_props.addr, - .flags = 0, .buf = &buf[0], .len = 2 }, - { .addr = priv->i2c_props.addr, - .flags = I2C_M_RD, .buf = &bval[0], .len = 2 }, - }; - - if (i2c_transfer(priv->i2c_props.adap, msg, 2) != 2) { - printk(KERN_WARNING "xc5000: I2C read failed\n"); - return -EREMOTEIO; - } - - *val = (bval[0] << 8) | bval[1]; - return XC_RESULT_SUCCESS; -} static int xc5000_fwupload(struct dvb_frontend *fe) { |