alistair23-linux/drivers/media/dvb-frontends/dib7000m.h

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#ifndef DIB7000M_H
#define DIB7000M_H
#include <linux/kconfig.h>
#include "dibx000_common.h"
struct dib7000m_config {
u8 dvbt_mode;
u8 output_mpeg2_in_188_bytes;
u8 hostbus_diversity;
u8 tuner_is_baseband;
u8 mobile_mode;
int (*update_lna) (struct dvb_frontend *, u16 agc_global);
u8 agc_config_count;
struct dibx000_agc_config *agc;
struct dibx000_bandwidth_config *bw;
#define DIB7000M_GPIO_DEFAULT_DIRECTIONS 0xffff
u16 gpio_dir;
#define DIB7000M_GPIO_DEFAULT_VALUES 0x0000
u16 gpio_val;
#define DIB7000M_GPIO_PWM_POS0(v) ((v & 0xf) << 12)
#define DIB7000M_GPIO_PWM_POS1(v) ((v & 0xf) << 8 )
#define DIB7000M_GPIO_PWM_POS2(v) ((v & 0xf) << 4 )
#define DIB7000M_GPIO_PWM_POS3(v) (v & 0xf)
#define DIB7000M_GPIO_DEFAULT_PWM_POS 0xffff
u16 gpio_pwm_pos;
u16 pwm_freq_div;
u8 quartz_direct;
u8 input_clk_is_div_2;
int (*agc_control) (struct dvb_frontend *, u8 before);
};
#define DEFAULT_DIB7000M_I2C_ADDRESS 18
[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>
2015-02-18 10:12:42 -07:00
#if IS_REACHABLE(CONFIG_DVB_DIB7000M)
extern struct dvb_frontend *dib7000m_attach(struct i2c_adapter *i2c_adap,
u8 i2c_addr,
struct dib7000m_config *cfg);
extern struct i2c_adapter *dib7000m_get_i2c_master(struct dvb_frontend *,
enum dibx000_i2c_interface,
int);
extern int dib7000m_pid_filter(struct dvb_frontend *, u8 id, u16 pid, u8 onoff);
extern int dib7000m_pid_filter_ctrl(struct dvb_frontend *fe, u8 onoff);
#else
static inline
struct dvb_frontend *dib7000m_attach(struct i2c_adapter *i2c_adap,
u8 i2c_addr, struct dib7000m_config *cfg)
{
printk(KERN_WARNING "%s: driver disabled by Kconfig\n", __func__);
return NULL;
}
static inline
struct i2c_adapter *dib7000m_get_i2c_master(struct dvb_frontend *demod,
enum dibx000_i2c_interface intf,
int gating)
{
printk(KERN_WARNING "%s: driver disabled by Kconfig\n", __func__);
return NULL;
}
static inline int dib7000m_pid_filter(struct dvb_frontend *fe, u8 id,
u16 pid, u8 onoff)
{
printk(KERN_WARNING "%s: driver disabled by Kconfig\n", __func__);
return -ENODEV;
}
static inline int dib7000m_pid_filter_ctrl(struct dvb_frontend *fe,
uint8_t onoff)
{
printk(KERN_WARNING "%s: driver disabled by Kconfig\n", __func__);
return -ENODEV;
}
#endif
/* TODO
extern INT dib7000m_set_gpio(struct dibDemod *demod, UCHAR num, UCHAR dir, UCHAR val);
extern INT dib7000m_enable_vbg_voltage(struct dibDemod *demod);
extern void dib7000m_set_hostbus_diversity(struct dibDemod *demod, UCHAR onoff);
extern USHORT dib7000m_get_current_agc_global(struct dibDemod *demod);
*/
#endif