diff options
Diffstat (limited to 'drivers/media/common')
| -rw-r--r-- | drivers/media/common/tuners/xc5000.c | 62 |
1 files changed, 20 insertions, 42 deletions
diff --git a/drivers/media/common/tuners/xc5000.c b/drivers/media/common/tuners/xc5000.c index be6981737fb..759168af0e2 100644 --- a/drivers/media/common/tuners/xc5000.c +++ b/drivers/media/common/tuners/xc5000.c @@ -193,7 +193,7 @@ static struct XC_TV_STANDARD XC5000_Standard[MAX_TV_STANDARD] = { 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 int xc5000_readreg(struct xc5000_priv *priv, u16 reg, u16 *val); static int xc5000_TunerReset(struct dvb_frontend *fe); static int xc_send_i2c_data(struct xc5000_priv *priv, u8 *buf, int len) @@ -202,10 +202,19 @@ static int xc_send_i2c_data(struct xc5000_priv *priv, u8 *buf, int len) ? XC_RESULT_I2C_WRITE_FAILURE : XC_RESULT_SUCCESS; } +/* This routine is never used because the only time we read data from the + i2c bus is when we read registers, and we want that to be an atomic i2c + transaction in case we are on a multi-master bus */ static int xc_read_i2c_data(struct xc5000_priv *priv, u8 *buf, int len) { - return xc5000_readregs(priv, buf, len) - ? XC_RESULT_I2C_READ_FAILURE : XC_RESULT_SUCCESS; + struct i2c_msg msg = { .addr = priv->i2c_props.addr, + .flags = I2C_M_RD, .buf = buf, .len = len }; + + if (i2c_transfer(priv->i2c_props.adap, &msg, 1) != 1) { + printk(KERN_ERR "xc5000 I2C read failed (len=%i)\n", len); + return -EREMOTEIO; + } + return 0; } static void xc_wait(int wait_ms) @@ -275,25 +284,6 @@ static int xc_write_reg(struct xc5000_priv *priv, u16 regAddr, u16 i2cData) return result; } -static int xc_read_reg(struct xc5000_priv *priv, u16 regAddr, u16 *i2cData) -{ - u8 buf[2]; - int result; - - buf[0] = (regAddr >> 8) & 0xFF; - buf[1] = regAddr & 0xFF; - result = xc_send_i2c_data(priv, buf, 2); - if (result != XC_RESULT_SUCCESS) - return result; - - result = xc_read_i2c_data(priv, buf, 2); - if (result != XC_RESULT_SUCCESS) - return result; - - *i2cData = buf[0] * 256 + buf[1]; - return result; -} - static int xc_load_i2c_sequence(struct dvb_frontend *fe, const u8 *i2c_sequence) { struct xc5000_priv *priv = fe->tuner_priv; @@ -423,7 +413,7 @@ static int xc_set_IF_frequency(struct xc5000_priv *priv, u32 freq_khz) static int xc_get_ADC_Envelope(struct xc5000_priv *priv, u16 *adc_envelope) { - return xc_read_reg(priv, XREG_ADC_ENV, adc_envelope); + return xc5000_readreg(priv, XREG_ADC_ENV, adc_envelope); } static int xc_get_frequency_error(struct xc5000_priv *priv, u32 *freq_error_hz) @@ -432,7 +422,7 @@ static int xc_get_frequency_error(struct xc5000_priv *priv, u32 *freq_error_hz) u16 regData; u32 tmp; - result = xc_read_reg(priv, XREG_FREQ_ERROR, ®Data); + result = xc5000_readreg(priv, XREG_FREQ_ERROR, ®Data); if (result) return result; @@ -443,7 +433,7 @@ static int xc_get_frequency_error(struct xc5000_priv *priv, u32 *freq_error_hz) static int xc_get_lock_status(struct xc5000_priv *priv, u16 *lock_status) { - return xc_read_reg(priv, XREG_LOCK, lock_status); + return xc5000_readreg(priv, XREG_LOCK, lock_status); } static int xc_get_version(struct xc5000_priv *priv, @@ -453,7 +443,7 @@ static int xc_get_version(struct xc5000_priv *priv, u16 data; int result; - result = xc_read_reg(priv, XREG_VERSION, &data); + result = xc5000_readreg(priv, XREG_VERSION, &data); if (result) return result; @@ -470,7 +460,7 @@ static int xc_get_hsync_freq(struct xc5000_priv *priv, u32 *hsync_freq_hz) u16 regData; int result; - result = xc_read_reg(priv, XREG_HSYNC_FREQ, ®Data); + result = xc5000_readreg(priv, XREG_HSYNC_FREQ, ®Data); if (result) return result; @@ -480,12 +470,12 @@ static int xc_get_hsync_freq(struct xc5000_priv *priv, u32 *hsync_freq_hz) static int xc_get_frame_lines(struct xc5000_priv *priv, u16 *frame_lines) { - return xc_read_reg(priv, XREG_FRAME_LINES, frame_lines); + return xc5000_readreg(priv, XREG_FRAME_LINES, frame_lines); } static int xc_get_quality(struct xc5000_priv *priv, u16 *quality) { - return xc_read_reg(priv, XREG_QUALITY, quality); + return xc5000_readreg(priv, XREG_QUALITY, quality); } static u16 WaitForLock(struct xc5000_priv *priv) @@ -535,7 +525,7 @@ static int xc5000_readreg(struct xc5000_priv *priv, u16 reg, u16 *val) } *val = (bval[0] << 8) | bval[1]; - return 0; + return XC_RESULT_SUCCESS; } static int xc5000_writeregs(struct xc5000_priv *priv, u8 *buf, u8 len) @@ -551,18 +541,6 @@ static int xc5000_writeregs(struct xc5000_priv *priv, u8 *buf, u8 len) return 0; } -static int xc5000_readregs(struct xc5000_priv *priv, u8 *buf, u8 len) -{ - struct i2c_msg msg = { .addr = priv->i2c_props.addr, - .flags = I2C_M_RD, .buf = buf, .len = len }; - - if (i2c_transfer(priv->i2c_props.adap, &msg, 1) != 1) { - printk(KERN_ERR "xc5000 I2C read failed (len=%i)\n", (int)len); - return -EREMOTEIO; - } - return 0; -} - static int xc5000_fwupload(struct dvb_frontend *fe) { struct xc5000_priv *priv = fe->tuner_priv; |