forked from Minki/linux
9b174527e7
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:7b34be71db("[media] use IS_ENABLED() macro") See-also:c5dec9fb24("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>
137 lines
3.4 KiB
C
137 lines
3.4 KiB
C
/*
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MaxLinear MXL5005S VSB/QAM/DVBT tuner driver
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Copyright (C) 2008 MaxLinear
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Copyright (C) 2008 Steven Toth <stoth@linuxtv.org>
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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 __MXL5005S_H
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#define __MXL5005S_H
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#include <linux/kconfig.h>
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#include <linux/i2c.h>
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#include "dvb_frontend.h"
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struct mxl5005s_config {
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/* 7 bit i2c address */
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u8 i2c_address;
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#define IF_FREQ_4570000HZ 4570000
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#define IF_FREQ_4571429HZ 4571429
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#define IF_FREQ_5380000HZ 5380000
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#define IF_FREQ_36000000HZ 36000000
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#define IF_FREQ_36125000HZ 36125000
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#define IF_FREQ_36166667HZ 36166667
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#define IF_FREQ_44000000HZ 44000000
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u32 if_freq;
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#define CRYSTAL_FREQ_4000000HZ 4000000
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#define CRYSTAL_FREQ_16000000HZ 16000000
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#define CRYSTAL_FREQ_25000000HZ 25000000
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#define CRYSTAL_FREQ_28800000HZ 28800000
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u32 xtal_freq;
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#define MXL_DUAL_AGC 0
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#define MXL_SINGLE_AGC 1
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u8 agc_mode;
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#define MXL_TF_DEFAULT 0
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#define MXL_TF_OFF 1
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#define MXL_TF_C 2
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#define MXL_TF_C_H 3
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#define MXL_TF_D 4
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#define MXL_TF_D_L 5
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#define MXL_TF_E 6
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#define MXL_TF_F 7
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#define MXL_TF_E_2 8
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#define MXL_TF_E_NA 9
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#define MXL_TF_G 10
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u8 tracking_filter;
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#define MXL_RSSI_DISABLE 0
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#define MXL_RSSI_ENABLE 1
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u8 rssi_enable;
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#define MXL_CAP_SEL_DISABLE 0
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#define MXL_CAP_SEL_ENABLE 1
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u8 cap_select;
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#define MXL_DIV_OUT_1 0
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#define MXL_DIV_OUT_4 1
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u8 div_out;
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#define MXL_CLOCK_OUT_DISABLE 0
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#define MXL_CLOCK_OUT_ENABLE 1
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u8 clock_out;
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#define MXL5005S_IF_OUTPUT_LOAD_200_OHM 200
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#define MXL5005S_IF_OUTPUT_LOAD_300_OHM 300
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u32 output_load;
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#define MXL5005S_TOP_5P5 55
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#define MXL5005S_TOP_7P2 72
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#define MXL5005S_TOP_9P2 92
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#define MXL5005S_TOP_11P0 110
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#define MXL5005S_TOP_12P9 129
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#define MXL5005S_TOP_14P7 147
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#define MXL5005S_TOP_16P8 168
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#define MXL5005S_TOP_19P4 194
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#define MXL5005S_TOP_21P2 212
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#define MXL5005S_TOP_23P2 232
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#define MXL5005S_TOP_25P2 252
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#define MXL5005S_TOP_27P1 271
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#define MXL5005S_TOP_29P2 292
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#define MXL5005S_TOP_31P7 317
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#define MXL5005S_TOP_34P9 349
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u32 top;
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#define MXL_ANALOG_MODE 0
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#define MXL_DIGITAL_MODE 1
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u8 mod_mode;
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#define MXL_ZERO_IF 0
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#define MXL_LOW_IF 1
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u8 if_mode;
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/* Some boards need to override the built-in logic for determining
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the gain when in QAM mode (the HVR-1600 is one such case) */
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u8 qam_gain;
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/* Stuff I don't know what to do with */
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u8 AgcMasterByte;
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};
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#if IS_REACHABLE(CONFIG_MEDIA_TUNER_MXL5005S)
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extern struct dvb_frontend *mxl5005s_attach(struct dvb_frontend *fe,
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struct i2c_adapter *i2c,
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struct mxl5005s_config *config);
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#else
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static inline struct dvb_frontend *mxl5005s_attach(struct dvb_frontend *fe,
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struct i2c_adapter *i2c,
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struct mxl5005s_config *config)
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{
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printk(KERN_WARNING "%s: driver disabled by Kconfig\n", __func__);
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return NULL;
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}
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#endif /* CONFIG_DVB_TUNER_MXL5005S */
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#endif /* __MXL5005S_H */
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