1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef _DRXK_H_
3 #define _DRXK_H_
4 
5 #include <linux/types.h>
6 #include <linux/i2c.h>
7 
8 /**
9  * struct drxk_config - Configure the initial parameters for DRX-K
10  *
11  * @adr:		I2C address of the DRX-K
12  * @parallel_ts:	True means that the device uses parallel TS,
13  *			Serial otherwise.
14  * @dynamic_clk:	True means that the clock will be dynamically
15  *			adjusted. Static clock otherwise.
16  * @enable_merr_cfg:	Enable SIO_PDR_PERR_CFG/SIO_PDR_MVAL_CFG.
17  * @single_master:	Device is on the single master mode
18  * @no_i2c_bridge:	Don't switch the I2C bridge to talk with tuner
19  * @antenna_gpio:	GPIO bit used to control the antenna
20  * @antenna_dvbt:	GPIO bit for changing antenna to DVB-C. A value of 1
21  *			means that 1=DVBC, 0 = DVBT. Zero means the opposite.
22  * @mpeg_out_clk_strength: DRXK Mpeg output clock drive strength.
23  * @chunk_size:		maximum size for I2C messages
24  * @microcode_name:	Name of the firmware file with the microcode
25  * @qam_demod_parameter_count:	The number of parameters used for the command
26  *				to set the demodulator parameters. All
27  *				firmwares are using the 2-parameter commmand.
28  *				An exception is the ``drxk_a3.mc`` firmware,
29  *				which uses the 4-parameter command.
30  *				A value of 0 (default) or lower indicates that
31  *				the correct number of parameters will be
32  *				automatically detected.
33  *
34  * On the ``*_gpio`` vars, bit 0 is UIO-1, bit 1 is UIO-2 and bit 2 is
35  * UIO-3.
36  */
37 struct drxk_config {
38 	u8	adr;
39 	bool	single_master;
40 	bool	no_i2c_bridge;
41 	bool	parallel_ts;
42 	bool	dynamic_clk;
43 	bool	enable_merr_cfg;
44 
45 	bool	antenna_dvbt;
46 	u16	antenna_gpio;
47 
48 	u8	mpeg_out_clk_strength;
49 	int	chunk_size;
50 
51 	const char	*microcode_name;
52 	int		 qam_demod_parameter_count;
53 };
54 
55 #if IS_REACHABLE(CONFIG_DVB_DRXK)
56 /**
57  * Attach a drxk demod
58  *
59  * @config: pointer to &struct drxk_config with demod configuration.
60  * @i2c: i2c adapter to use.
61  *
62  * return: FE pointer on success, NULL on failure.
63  */
64 extern struct dvb_frontend *drxk_attach(const struct drxk_config *config,
65 					struct i2c_adapter *i2c);
66 #else
67 static inline struct dvb_frontend *drxk_attach(const struct drxk_config *config,
68 					struct i2c_adapter *i2c)
69 {
70 	printk(KERN_WARNING "%s: driver disabled by Kconfig\n", __func__);
71 	return NULL;
72 }
73 #endif
74 
75 #endif
76