OpenCloudOS-Kernel/drivers/media/pci/cx23885/altera-ci.h

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/*
* altera-ci.c
*
* CI driver in conjunction with NetUp Dual DVB-T/C RF CI card
*
* Copyright (C) 2010 NetUP Inc.
* Copyright (C) 2010 Igor M. Liplianin <liplianin@netup.ru>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
*
* GNU General Public License for more details.
*/
#ifndef __ALTERA_CI_H
#define __ALTERA_CI_H
#define ALT_DATA 0x000000ff
#define ALT_TDI 0x00008000
#define ALT_TDO 0x00004000
#define ALT_TCK 0x00002000
#define ALT_RDY 0x00001000
#define ALT_RD 0x00000800
#define ALT_WR 0x00000400
#define ALT_AD_RG 0x00000200
#define ALT_CS 0x00000100
struct altera_ci_config {
void *dev;/* main dev, for example cx23885_dev */
void *adapter;/* for CI to connect to */
struct dvb_demux *demux;/* for hardware PID filter to connect to */
int (*fpga_rw) (void *dev, int ad_rg, int val, int rw);
};
[media] Add and use IS_REACHABLE macro In the media drivers, the v4l2 core knows about all submodules and calls into them from a common function. However this cannot work if the modules that get called are loadable and the core is built-in. In that case we get drivers/built-in.o: In function `set_type': drivers/media/v4l2-core/tuner-core.c:301: undefined reference to `tea5767_attach' drivers/media/v4l2-core/tuner-core.c:307: undefined reference to `tea5761_attach' drivers/media/v4l2-core/tuner-core.c:349: undefined reference to `tda9887_attach' drivers/media/v4l2-core/tuner-core.c:405: undefined reference to `xc4000_attach' This was working previously, until the IS_ENABLED() macro was used to replace the construct like #if defined(CONFIG_DVB_CX24110) || (defined(CONFIG_DVB_CX24110_MODULE) && defined(MODULE)) with the difference that the new code no longer checks whether it is being built as a loadable module itself. To fix this, this new patch adds an 'IS_REACHABLE' macro, which evaluates true in exactly the condition that was used previously. The downside of this is that this trades an obvious link error for a more subtle runtime failure, but it is clear that the change that introduced the link error was unintentional and it seems better to revert it for now. Also, a similar change was originally created by Trent Piepho and then reverted by teh change to the IS_ENABLED macro. Ideally Kconfig would be used to avoid the case of a broken dependency, or the code restructured in a way to turn around the dependency, but either way would require much larger changes here. Fixes: 7b34be71db53 ("[media] use IS_ENABLED() macro") See-also: c5dec9fb248e ("V4L/DVB (4751): Fix DBV_FE_CUSTOMISE for card drivers compiled into kernel") Signed-off-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
2015-02-19 01:12:42 +08:00
#if IS_REACHABLE(CONFIG_MEDIA_ALTERA_CI)
extern int altera_ci_init(struct altera_ci_config *config, int ci_nr);
extern void altera_ci_release(void *dev, int ci_nr);
extern int altera_ci_irq(void *dev);
extern int altera_ci_tuner_reset(void *dev, int ci_nr);
#else
static inline int altera_ci_init(struct altera_ci_config *config, int ci_nr)
{
pr_warn("%s: driver disabled by Kconfig\n", __func__);
return 0;
}
static inline void altera_ci_release(void *dev, int ci_nr)
{
pr_warn("%s: driver disabled by Kconfig\n", __func__);
}
static inline int altera_ci_irq(void *dev)
{
pr_warn("%s: driver disabled by Kconfig\n", __func__);
return 0;
}
static inline int altera_ci_tuner_reset(void *dev, int ci_nr)
{
pr_warn("%s: driver disabled by Kconfig\n", __func__);
return 0;
}
#endif
#if 0
static inline int altera_hw_filt_init(struct altera_ci_config *config,
int hw_filt_nr)
{
pr_warn("%s: driver disabled by Kconfig\n", __func__);
return 0;
}
static inline void altera_hw_filt_release(void *dev, int filt_nr)
{
pr_warn("%s: driver disabled by Kconfig\n", __func__);
}
static inline int altera_pid_feed_control(void *dev, int filt_nr,
struct dvb_demux_feed *dvbdmxfeed, int onoff)
{
pr_warn("%s: driver disabled by Kconfig\n", __func__);
return 0;
}
#endif /* CONFIG_MEDIA_ALTERA_CI */
#endif /* __ALTERA_CI_H */