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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>
103 lines
3 KiB
C
103 lines
3 KiB
C
/*
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Driver for Philips tda1004xh OFDM Frontend
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(c) 2004 Andrew de Quincey
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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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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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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#ifndef TDA1004X_H
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#define TDA1004X_H
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#include <linux/dvb/frontend.h>
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#include <linux/firmware.h>
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enum tda10046_xtal {
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TDA10046_XTAL_4M,
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TDA10046_XTAL_16M,
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};
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enum tda10046_agc {
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TDA10046_AGC_DEFAULT, /* original configuration */
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TDA10046_AGC_IFO_AUTO_NEG, /* IF AGC only, automatic, negtive */
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TDA10046_AGC_IFO_AUTO_POS, /* IF AGC only, automatic, positive */
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TDA10046_AGC_TDA827X, /* IF AGC only, special setup for tda827x */
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TDA10046_AGC_TDA827X_GPL, /* same as above, but GPIOs 0 */
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};
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enum tda10046_if {
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TDA10046_FREQ_3617, /* original config, 36,166 MHZ */
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TDA10046_FREQ_3613, /* 36,13 MHZ */
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TDA10046_FREQ_045, /* low IF, 4.0, 4.5, or 5.0 MHZ */
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TDA10046_FREQ_052, /* low IF, 5.1667 MHZ for tda9889 */
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};
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struct tda1004x_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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/* does the "inversion" need inverted? */
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u8 invert;
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/* Does the OCLK signal need inverted? */
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u8 invert_oclk;
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/* Xtal frequency, 4 or 16MHz*/
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enum tda10046_xtal xtal_freq;
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/* IF frequency */
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enum tda10046_if if_freq;
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/* AGC configuration */
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enum tda10046_agc agc_config;
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/* request firmware for device */
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/* set this to NULL if the card has a firmware EEPROM */
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int (*request_firmware)(struct dvb_frontend* fe, const struct firmware **fw, char* name);
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};
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#if defined(CONFIG_DVB_TDA1004X) || (defined(CONFIG_DVB_TDA1004X_MODULE) && defined(MODULE))
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extern struct dvb_frontend* tda10045_attach(const struct tda1004x_config* config,
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struct i2c_adapter* i2c);
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extern struct dvb_frontend* tda10046_attach(const struct tda1004x_config* config,
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struct i2c_adapter* i2c);
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#else
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static inline struct dvb_frontend* tda10045_attach(const struct tda1004x_config* config,
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struct i2c_adapter* i2c)
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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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static inline struct dvb_frontend* tda10046_attach(const struct tda1004x_config* config,
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struct i2c_adapter* i2c)
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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_TDA1004X
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static inline int tda1004x_writereg(struct dvb_frontend *fe, u8 reg, u8 val) {
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int r = 0;
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u8 buf[] = {reg, val};
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if (fe->ops.write)
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r = fe->ops.write(fe, buf, 2);
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return r;
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}
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#endif // TDA1004X_H
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