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media: cxusb: implement Medion MD95700 digital / analog coexistence

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This patch prepares cxusb driver for supporting the analog part of
Medion 95700 (previously only the digital - DVB - mode was supported).

Specifically, it adds support for:
* switching the device between analog and digital modes of operation,
* enforcing that only one mode is active at the same time due to hardware
limitations.

Actual implementation of the analog mode will be provided by the next
commit.

Signed-off-by: Maciej S. Szmigiero <mail@maciej.szmigiero.name>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
This commit is contained in:
Maciej S. Szmigiero
2019-04-29 12:16:57 -04:00
committed by Mauro Carvalho Chehab
parent 65efeca0a6
commit d525e5c2f1
5 changed files with 472 additions and 53 deletions
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48
drivers/media/usb/dvb-usb/cxusb.h
View File

@@ -2,6 +2,9 @@
#ifndef _DVB_USB_CXUSB_H_
#define _DVB_USB_CXUSB_H_
#include <linux/i2c.h>
#include <linux/mutex.h>
#define DVB_USB_LOG_PREFIX "cxusb"
#include "dvb-usb.h"
@@ -34,6 +37,7 @@
struct cxusb_state {
u8 gpio_write_state[3];
bool gpio_write_refresh[3];
struct i2c_client *i2c_client_demod;
struct i2c_client *i2c_client_tuner;
@@ -45,4 +49,48 @@ struct cxusb_state {
enum fe_status *status);
};
enum cxusb_open_type {
CXUSB_OPEN_INIT, CXUSB_OPEN_NONE,
CXUSB_OPEN_ANALOG, CXUSB_OPEN_DIGITAL
};
struct cxusb_medion_dev {
/* has to be the first one */
struct cxusb_state state;
struct dvb_usb_device *dvbdev;
enum cxusb_open_type open_type;
unsigned int open_ctr;
struct mutex open_lock;
};
/* defines for "debug" module parameter */
#define CXUSB_DBG_RC BIT(0)
#define CXUSB_DBG_I2C BIT(1)
#define CXUSB_DBG_MISC BIT(2)
extern int dvb_usb_cxusb_debug;
int cxusb_ctrl_msg(struct dvb_usb_device *d,
u8 cmd, const u8 *wbuf, int wlen, u8 *rbuf, int rlen);
static inline int cxusb_medion_analog_init(struct dvb_usb_device *dvbdev)
{
return -EINVAL;
}
static inline int cxusb_medion_register_analog(struct dvb_usb_device *dvbdev)
{
return 0;
}
static inline void cxusb_medion_unregister_analog(struct dvb_usb_device *dvbdev)
{
}
int cxusb_medion_get(struct dvb_usb_device *dvbdev,
enum cxusb_open_type open_type);
void cxusb_medion_put(struct dvb_usb_device *dvbdev);
#endif