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c5dec9fb24
When a front-end is disabled, card drivers that use it are compiled with a stub version of the front-end's attach function. This way they have no references to the front-end's code and don't need it to be loaded. If a card driver is compiled into the kernel, and a front-end is a module, then that front-end is effectively disabled wrt the card driver. In this case, the card driver should get the stub version. This was not happening. The stub vs real attach function selection is changed so that when the front-end is a module the real attach function is only used if the card driver is a module as well. This means a module front-end will be supported by card drivers that are modules and not supported by card drivers compiled into the kernel. Signed-off-by: Trent Piepho <xyzzy@speakeasy.org> Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
57 lines
1.8 KiB
C
57 lines
1.8 KiB
C
/*
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* public header file of the frontend drivers for mobile DVB-T demodulators
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* DiBcom 3000M-B and DiBcom 3000P/M-C (http://www.dibcom.fr/)
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*
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* Copyright (C) 2004-5 Patrick Boettcher (patrick.boettcher@desy.de)
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*
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* based on GPL code from DibCom, which has
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*
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* Copyright (C) 2004 Amaury Demol for DiBcom (ademol@dibcom.fr)
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation, version 2.
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*
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* Acknowledgements
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*
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* Amaury Demol (ademol@dibcom.fr) from DiBcom for providing specs and driver
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* sources, on which this driver (and the dvb-dibusb) are based.
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*
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* see Documentation/dvb/README.dibusb for more information
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*
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*/
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#ifndef DIB3000_H
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#define DIB3000_H
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#include <linux/dvb/frontend.h>
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struct dib3000_config
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{
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/* the demodulator's i2c address */
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u8 demod_address;
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};
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struct dib_fe_xfer_ops
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{
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/* pid and transfer handling is done in the demodulator */
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int (*pid_parse)(struct dvb_frontend *fe, int onoff);
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int (*fifo_ctrl)(struct dvb_frontend *fe, int onoff);
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int (*pid_ctrl)(struct dvb_frontend *fe, int index, int pid, int onoff);
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int (*tuner_pass_ctrl)(struct dvb_frontend *fe, int onoff, u8 pll_ctrl);
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};
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#if defined(CONFIG_DVB_DIB3000MB) || (defined(CONFIG_DVB_DIB3000MB_MODULE) && defined(MODULE))
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extern struct dvb_frontend* dib3000mb_attach(const struct dib3000_config* config,
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struct i2c_adapter* i2c, struct dib_fe_xfer_ops *xfer_ops);
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#else
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static inline struct dvb_frontend* dib3000mb_attach(const struct dib3000_config* config,
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struct i2c_adapter* i2c, struct dib_fe_xfer_ops *xfer_ops)
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{
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printk(KERN_WARNING "%s: driver disabled by Kconfig\n", __FUNCTION__);
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return NULL;
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}
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#endif // CONFIG_DVB_DIB3000MB
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#endif // DIB3000_H
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