From 0e2f0d348a65b48a8af52d7fd64d77b5759413fa Mon Sep 17 00:00:00 2001 From: Akihiro Tsukada Date: Thu, 19 Nov 2009 12:19:50 -0300 Subject: [PATCH] V4L/DVB (13577): [PATCH] dvb-usb-friio: accept center-shifted frequency 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. Signed-off-by: Akihiro Tsukada Signed-off-by: Patrick Boettcher Signed-off-by: Mauro Carvalho Chehab --- drivers/media/dvb/dvb-usb/friio-fe.c | 10 ++++++---- 1 file changed, 6 insertions(+), 4 deletions(-) diff --git a/drivers/media/dvb/dvb-usb/friio-fe.c b/drivers/media/dvb/dvb-usb/friio-fe.c index 9cbbe42ca44b..ebb7b9fd115b 100644 --- a/drivers/media/dvb/dvb-usb/friio-fe.c +++ b/drivers/media/dvb/dvb-usb/friio-fe.c @@ -134,11 +134,13 @@ static int jdvbt90502_pll_set_freq(struct jdvbt90502_state *state, u32 freq) 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; -- GitLab