On Tue, Mar 31, 2009 at 11:46 AM, Devin Heitmueller <devin.heitmuel...@gmail.com> wrote: > On Mon, Mar 30, 2009 at 11:39 PM, David Wong <davidtlw...@gmail.com> wrote: >> On Tue, Mar 31, 2009 at 10:57 AM, Devin Heitmueller >> <devin.heitmuel...@gmail.com> wrote: >>> On Mon, Mar 30, 2009 at 10:47 PM, David Wong <davidtlw...@gmail.com> wrote: >>>> Does anyone know how to get XC5000 working for DVB-T, especially 8MHz >>>> bandwidth? >>>> Current driver only supports ATSC with 6MHz bandwidth only. >>>> It seems there is a trick at setting compensated RF frequency. >>>> >>>> DVB-T 8MHz support would probably works for DMB-TH, but DMB-TH >>>> settings is very welcome. >>>> >>>> Regards, >>>> David >>>> -- >>>> To unsubscribe from this list: send the line "unsubscribe linux-media" in >>>> the body of a message to majord...@vger.kernel.org >>>> More majordomo info at http://vger.kernel.org/majordomo-info.html >>>> >>> >>> All of my xc5000 work has been with ATSC/QAM, so I can't say >>> authoritatively what is required to make it work. >>> >>> Well, at a minimum you will have to modify xc5000_set_params to >>> support setting priv->video_standard to DTV8. Beyond that, I don't >>> think you need to do anything specific for DVB-T. >>> >>> Devin >>> >>> -- >>> Devin J. Heitmueller >>> http://www.devinheitmueller.com >>> AIM: devinheitmueller >>> >> >> I have tried followings in xc5000_set_params() >> >> if (fe->ops.info.type == FE_ATSC) { >> ... >> } else if (fe->ops.info.type == FE_OFDM) { >> switch (params->u.ofdm.bandwidth) { >> case BANDWIDTH_6_MHZ: >> printk("xc5000 bandwidth 6MHz\n"); >> priv->bandwidth = BANDWIDTH_6_MHZ; >> priv->video_standard = DTV6; >> break; >> case BANDWIDTH_7_MHZ: >> printk("xc5000 bandwidth 7MHz\n"); >> priv->bandwidth = BANDWIDTH_7_MHZ; >> priv->video_standard = DTV7; >> break; >> case BANDWIDTH_8_MHZ: >> printk("xc5000 bandwidth 8MHz\n"); >> priv->bandwidth = BANDWIDTH_8_MHZ; >> priv->video_standard = DTV8; >> break; >> default: >> printk("xc5000 bandwidth not set!\n"); >> return -EINVAL; >> } >> priv->rf_mode = XC_RF_MODE_AIR; >> priv->freq_hz = params->frequency - 1750000; >> } >> >> >> But no success yet. >> I am wondering the -1750000 compensation for DTV8. >> >> BTW, The xc_debug_dump() could get more information like firmware >> build number and tuner total gain >> >> diff -r 2276e777f950 linux/drivers/media/common/tuners/xc5000.c >> --- a/linux/drivers/media/common/tuners/xc5000.c Thu Mar 26 22:17:48 >> 2009 -0300 >> +++ b/linux/drivers/media/common/tuners/xc5000.c Mon Mar 30 16:23:11 >> 2009 +0800 >> @@ -84,6 +84,7 @@ >> #define XREG_IF_OUT 0x05 >> #define XREG_SEEK_MODE 0x07 >> #define XREG_POWER_DOWN 0x0A >> +#define XREG_OUTPUT_AMP 0x0B >> #define XREG_SIGNALSOURCE 0x0D /* 0=Air, 1=Cable */ >> #define XREG_SMOOTHEDCVBS 0x0E >> #define XREG_XTALFREQ 0x0F >> @@ -100,6 +101,8 @@ >> #define XREG_VERSION 0x07 >> #define XREG_PRODUCT_ID 0x08 >> #define XREG_BUSY 0x09 >> +#define XREG_BUILD_NUM 0x0D >> +#define XREG_TOTAL_GAIN 0x0F >> >> /* >> Basic firmware description. This will remain with >> @@ -468,7 +485,8 @@ >> >> static int xc_get_version(struct xc5000_priv *priv, >> u8 *hw_majorversion, u8 *hw_minorversion, >> - u8 *fw_majorversion, u8 *fw_minorversion) >> + u8 *fw_majorversion, u8 *fw_minorversion, >> + u16 *fw_buildnum) >> { >> u16 data; >> int result; >> @@ -481,6 +499,11 @@ >> (*hw_minorversion) = (data >> 8) & 0x0F; >> (*fw_majorversion) = (data >> 4) & 0x0F; >> (*fw_minorversion) = data & 0x0F; >> + >> + result = xc_read_reg(priv, XREG_BUILD_NUM, &data); >> + if (result) >> + return result; >> + *fw_buildnum = data; >> >> return 0; >> } >> @@ -506,6 +529,11 @@ >> static int xc_get_quality(struct xc5000_priv *priv, u16 *quality) >> { >> return xc_read_reg(priv, XREG_QUALITY, quality); >> +} >> + >> +static int xc_get_total_gain(struct xc5000_priv *priv, u16 *gain) >> +{ >> + return xc_read_reg(priv, XREG_TOTAL_GAIN, gain); >> } >> >> static u16 WaitForLock(struct xc5000_priv *priv) >> @@ -626,8 +654,10 @@ >> u32 hsync_freq_hz = 0; >> u16 frame_lines; >> u16 quality; >> + u16 gain; >> u8 hw_majorversion = 0, hw_minorversion = 0; >> u8 fw_majorversion = 0, fw_minorversion = 0; >> + u16 fw_buildnum = 0; >> >> /* Wait for stats to stabilize. >> * Frame Lines needs two frame times after initial lock >> @@ -646,10 +676,11 @@ >> lock_status); >> >> xc_get_version(priv, &hw_majorversion, &hw_minorversion, >> - &fw_majorversion, &fw_minorversion); >> - dprintk(1, "*** HW: V%02x.%02x, FW: V%02x.%02x\n", >> + &fw_majorversion, &fw_minorversion, &fw_buildnum); >> + dprintk(1, "*** HW: V%02x.%02x, FW: V%02x.%02x build %d\n", >> hw_majorversion, hw_minorversion, >> - fw_majorversion, fw_minorversion); >> + fw_majorversion, fw_minorversion, >> + fw_buildnum); >> >> xc_get_hsync_freq(priv, &hsync_freq_hz); >> dprintk(1, "*** Horizontal sync frequency = %d Hz\n", hsync_freq_hz); >> @@ -659,6 +690,9 @@ >> >> xc_get_quality(priv, &quality); >> dprintk(1, "*** Quality (0:<8dB, 7:>56dB) = %d\n", quality); >> + >> + xc_get_total_gain(priv, &gain); >> + dprintk(1, "*** Total Gain = %d mdB\n", gain * 1000 / 256); >> } >> > > That compensation offset should be correct for all of the digital standards. >
Thanks Devin, perhaps there is something that I don't know between the tuner and the demod (lgs8gl5) on my card, so it doesn't work. Honestly I have never seen such digital output from a tuner (DDI interface). I don't know if my card use that, and I have never seen lgs8xxx with serial digital input from tuner. What is the "protocol" of DDI of XC5000? UART-like or I2C-like? it has only two wires, p and n. I am wonder how it defines clock and data. David -- To unsubscribe from this list: send the line "unsubscribe linux-media" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
