Hi Akihiro,
On Thu, 12 Nov 2009, Akihiro TSUKADA wrote:
From: Akihiro Tsukada <tskd2@xxxxxxxxxxx>
This patch adds a fix to accept frequency with its center shifted.
The driver used to accept center frequencies of the normal UHF band channels,
but in ISDB-T, center frequency is shifted with 1/7MHz.
It was shifted internally in the driver,
but this patch enables to accept both types of frequency.
Priority: normal
Signed-off-by: Akihiro Tsukada <tskd2@xxxxxxxxxxx>
---
friio-fe.c | 10 ++++++----
1 file changed, 6 insertions(+), 4 deletions(-)
diff --git a/linux/drivers/media/dvb/dvb-usb/friio-fe.c b/linux/drivers/media/dvb/dvb-usb/friio-fe.c
--- a/linux/drivers/media/dvb/dvb-usb/friio-fe.c
+++ b/linux/drivers/media/dvb/dvb-usb/friio-fe.c
@@ -134,11 +134,13 @@ static int jdvbt90502_pll_set_freq(struc
deb_fe("%s: freq=%d, step=%d\n", __func__, freq,
state->frontend.ops.info.frequency_stepsize);
/* freq -> oscilator frequency conversion. */
- /* freq: 473,000,000 + n*6,000,000 (no 1/7MHz shift to center freq) */
- /* add 400[1/7 MHZ] = 57.142857MHz. 57MHz for the IF, */
- /* 1/7MHz for center freq shift */
+ /* freq: 473,000,000 + n*6,000,000 [+ 142857 (center freq. shift)] */
f = freq / state->frontend.ops.info.frequency_stepsize;
- f += 400;
+ /* add 399[1/7 MHZ] = 57MHz for the IF */
+ f += 399;
+ /* add center frequency shift if necessary */
+ if (f % 7 == 0)
+ f++;
pll_freq_cmd[DEMOD_REDIRECT_REG] = JDVBT90502_2ND_I2C_REG; /* 0xFE */
pll_freq_cmd[ADDRESS_BYTE] = state->config.pll_address << 1;
pll_freq_cmd[DIVIDER_BYTE1] = (f >> 8) & 0x7F;
I applied your patch, I will later asked Mauro to pull it into main.
thanks,
--
Patrick
http://www.kernellabs.com/
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