forked from Minki/linux
58b7450d56
Optimal AGC is highly depended on used RF tuner and due to that it is already included to chip configuration. However, inittab has default AGC value, which was later replaced by one from config. Add also comment to all chip configuration options about default values and if those are needed to set or not. Reported-by: David Howells <dhowells@redhat.com> Signed-off-by: Antti Palosaari <crope@iki.fi> Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
119 lines
2.9 KiB
C
119 lines
2.9 KiB
C
/*
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* Montage M88DS3103 demodulator driver
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*
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* Copyright (C) 2013 Antti Palosaari <crope@iki.fi>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#ifndef M88DS3103_H
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#define M88DS3103_H
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#include <linux/dvb/frontend.h>
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struct m88ds3103_config {
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/*
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* I2C address
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* Default: none, must set
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* 0x68, ...
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*/
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u8 i2c_addr;
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/*
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* clock
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* Default: none, must set
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* 27000000
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*/
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u32 clock;
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/*
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* max bytes I2C provider is asked to write at once
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* Default: none, must set
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* 33, 65, ...
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*/
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u16 i2c_wr_max;
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/*
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* TS output mode
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* Default: M88DS3103_TS_SERIAL
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*/
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#define M88DS3103_TS_SERIAL 0 /* TS output pin D0, normal */
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#define M88DS3103_TS_SERIAL_D7 1 /* TS output pin D7 */
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#define M88DS3103_TS_PARALLEL 2 /* 24 MHz, normal */
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#define M88DS3103_TS_PARALLEL_12 3 /* 12 MHz */
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#define M88DS3103_TS_PARALLEL_16 4 /* 16 MHz */
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#define M88DS3103_TS_PARALLEL_19_2 5 /* 19.2 MHz */
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#define M88DS3103_TS_CI 6 /* 6 MHz */
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u8 ts_mode;
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/*
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* spectrum inversion
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* Default: 0
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*/
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u8 spec_inv:1;
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/*
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* AGC polarity
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* Default: 0
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*/
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u8 agc_inv:1;
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/*
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* clock output
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* Default: M88DS3103_CLOCK_OUT_DISABLED
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*/
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#define M88DS3103_CLOCK_OUT_DISABLED 0
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#define M88DS3103_CLOCK_OUT_ENABLED 1
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#define M88DS3103_CLOCK_OUT_ENABLED_DIV2 2
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u8 clock_out;
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/*
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* DiSEqC envelope mode
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* Default: 0
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*/
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u8 envelope_mode:1;
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/*
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* AGC configuration
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* Default: none, must set
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*/
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u8 agc;
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};
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/*
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* Driver implements own I2C-adapter for tuner I2C access. That's since chip
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* has I2C-gate control which closes gate automatically after I2C transfer.
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* Using own I2C adapter we can workaround that.
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*/
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#if defined(CONFIG_DVB_M88DS3103) || \
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(defined(CONFIG_DVB_M88DS3103_MODULE) && defined(MODULE))
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extern struct dvb_frontend *m88ds3103_attach(
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const struct m88ds3103_config *config,
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struct i2c_adapter *i2c,
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struct i2c_adapter **tuner_i2c);
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#else
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static inline struct dvb_frontend *m88ds3103_attach(
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const struct m88ds3103_config *config,
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struct i2c_adapter *i2c,
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struct i2c_adapter **tuner_i2c)
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{
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pr_warn("%s: driver disabled by Kconfig\n", __func__);
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return NULL;
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}
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#endif
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#endif
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