[media] dvb_usb_v2: copy current dvb_usb as a starting point

/* dvb-usb.h is part of the DVB USB library.

 *

 * Copyright (C) 2004-6 Patrick Boettcher (patrick.boettcher@desy.de)

 * see dvb-usb-init.c for copyright information.

 *

 * the headerfile, all dvb-usb-drivers have to include.

 *

 * TODO: clean-up the structures for unused fields and update the comments

 */

#ifndef DVB_USB_H

#define DVB_USB_H

#include <linux/input.h>

#include <linux/usb.h>

#include <linux/firmware.h>

#include <linux/mutex.h>

#include <media/rc-core.h>

#include "dvb_frontend.h"

#include "dvb_demux.h"

#include "dvb_net.h"

#include "dmxdev.h"

#include "dvb-pll.h"

#include "dvb-usb-ids.h"

/* debug */

#ifdef CONFIG_DVB_USB_DEBUG

#define dprintk(var,level,args...) \

	    do { if ((var & level)) { printk(args); } } while (0)

#define debug_dump(b,l,func) {\

	int loop_; \

	for (loop_ = 0; loop_ < l; loop_++) func("%02x ", b[loop_]); \

	func("\n");\

}

#define DVB_USB_DEBUG_STATUS

#else

#define dprintk(args...)

#define debug_dump(b,l,func)

#define DVB_USB_DEBUG_STATUS " (debugging is not enabled)"

#endif

/* generic log methods - taken from usb.h */

#ifndef DVB_USB_LOG_PREFIX

 #define DVB_USB_LOG_PREFIX "dvb-usb (please define a log prefix)"

#endif

#undef err

#define err(format, arg...)  printk(KERN_ERR     DVB_USB_LOG_PREFIX ": " format "\n" , ## arg)

#undef info

#define info(format, arg...) printk(KERN_INFO    DVB_USB_LOG_PREFIX ": " format "\n" , ## arg)

#undef warn

#define warn(format, arg...) printk(KERN_WARNING DVB_USB_LOG_PREFIX ": " format "\n" , ## arg)

/**

 * struct dvb_usb_device_description - name and its according USB IDs

 * @name: real name of the box, regardless which DVB USB device class is in use

 * @cold_ids: array of struct usb_device_id which describe the device in

 *  pre-firmware state

 * @warm_ids: array of struct usb_device_id which describe the device in

 *  post-firmware state

 *

 * Each DVB USB device class can have one or more actual devices, this struct

 * assigns a name to it.

 */

struct dvb_usb_device_description {

	const char *name;

#define DVB_USB_ID_MAX_NUM 15

	struct usb_device_id *cold_ids[DVB_USB_ID_MAX_NUM];

	struct usb_device_id *warm_ids[DVB_USB_ID_MAX_NUM];

};

static inline u8 rc5_custom(struct rc_map_table *key)

{

	return (key->scancode >> 8) & 0xff;

}

static inline u8 rc5_data(struct rc_map_table *key)

{

	return key->scancode & 0xff;

}

static inline u16 rc5_scan(struct rc_map_table *key)

{

	return key->scancode & 0xffff;

}

struct dvb_usb_device;

struct dvb_usb_adapter;

struct usb_data_stream;

/**

 * Properties of USB streaming - TODO this structure should be somewhere else

 * describes the kind of USB transfer used for data-streaming.

 *  (BULK or ISOC)

 */

struct usb_data_stream_properties {

#define USB_BULK  1

#define USB_ISOC  2

	int type;

	int count;

	int endpoint;

	union {

		struct {

			int buffersize; /* per URB */

		} bulk;

		struct {

			int framesperurb;

			int framesize;

			int interval;

		} isoc;

	} u;

};

/**

 * struct dvb_usb_adapter_properties - properties of a dvb-usb-adapter.

 *    A DVB-USB-Adapter is basically a dvb_adapter which is present on a USB-device.

 * @caps: capabilities of the DVB USB device.

 * @pid_filter_count: number of PID filter position in the optional hardware

 *  PID-filter.

 * @num_frontends: number of frontends of the DVB USB adapter.

 * @frontend_ctrl: called to power on/off active frontend.

 * @streaming_ctrl: called to start and stop the MPEG2-TS streaming of the

 *  device (not URB submitting/killing).

 * @pid_filter_ctrl: called to en/disable the PID filter, if any.

 * @pid_filter: called to set/unset a PID for filtering.

 * @frontend_attach: called to attach the possible frontends (fill fe-field

 *  of struct dvb_usb_device).

 * @tuner_attach: called to attach the correct tuner and to fill pll_addr,

 *  pll_desc and pll_init_buf of struct dvb_usb_device).

 * @stream: configuration of the USB streaming

 */

struct dvb_usb_adapter_fe_properties {

#define DVB_USB_ADAP_HAS_PID_FILTER               0x01

#define DVB_USB_ADAP_PID_FILTER_CAN_BE_TURNED_OFF 0x02

#define DVB_USB_ADAP_NEED_PID_FILTERING           0x04

#define DVB_USB_ADAP_RECEIVES_204_BYTE_TS         0x08

#define DVB_USB_ADAP_RECEIVES_RAW_PAYLOAD         0x10

	int caps;

	int pid_filter_count;

	int (*streaming_ctrl)  (struct dvb_usb_adapter *, int);

	int (*pid_filter_ctrl) (struct dvb_usb_adapter *, int);

	int (*pid_filter)      (struct dvb_usb_adapter *, int, u16, int);

	int (*frontend_attach) (struct dvb_usb_adapter *);

	int (*tuner_attach)    (struct dvb_usb_adapter *);

	struct usb_data_stream_properties stream;

	int size_of_priv;

};

#define MAX_NO_OF_FE_PER_ADAP 3

struct dvb_usb_adapter_properties {

	int size_of_priv;

	int (*frontend_ctrl)   (struct dvb_frontend *, int);

	int (*fe_ioctl_override) (struct dvb_frontend *,

				  unsigned int, void *, unsigned int);

	int num_frontends;

	struct dvb_usb_adapter_fe_properties fe[MAX_NO_OF_FE_PER_ADAP];

};

/**

 * struct dvb_rc_legacy - old properties of remote controller

 * @rc_map_table: a hard-wired array of struct rc_map_table (NULL to disable

 *  remote control handling).

 * @rc_map_size: number of items in @rc_map_table.

 * @rc_query: called to query an event event.

 * @rc_interval: time in ms between two queries.

 */

struct dvb_rc_legacy {

/* remote control properties */

#define REMOTE_NO_KEY_PRESSED      0x00

#define REMOTE_KEY_PRESSED         0x01

#define REMOTE_KEY_REPEAT          0x02

	struct rc_map_table  *rc_map_table;

	int rc_map_size;

	int (*rc_query) (struct dvb_usb_device *, u32 *, int *);

	int rc_interval;

};

/**

 * struct dvb_rc properties of remote controller, using rc-core

 * @rc_codes: name of rc codes table

 * @protocol: type of protocol(s) currently used by the driver

 * @allowed_protos: protocol(s) supported by the driver

 * @driver_type: Used to point if a device supports raw mode

 * @change_protocol: callback to change protocol

 * @rc_query: called to query an event event.

 * @rc_interval: time in ms between two queries.

 * @bulk_mode: device supports bulk mode for RC (disable polling mode)

 */

struct dvb_rc {

	char *rc_codes;

	u64 protocol;

	u64 allowed_protos;

	enum rc_driver_type driver_type;

	int (*change_protocol)(struct rc_dev *dev, u64 rc_type);

	char *module_name;

	int (*rc_query) (struct dvb_usb_device *d);

	int rc_interval;

	bool bulk_mode;				/* uses bulk mode */

};

/**

 * enum dvb_usb_mode - Specifies if it is using a legacy driver or a new one

 *		       based on rc-core

 * This is initialized/used only inside dvb-usb-remote.c.

 * It shouldn't be set by the drivers.

 */

enum dvb_usb_mode {

	DVB_RC_LEGACY,

	DVB_RC_CORE,

};

/**

 * struct dvb_usb_device_properties - properties of a dvb-usb-device

 * @usb_ctrl: which USB device-side controller is in use. Needed for firmware

 *  download.

 * @firmware: name of the firmware file.

 * @download_firmware: called to download the firmware when the usb_ctrl is

 *  DEVICE_SPECIFIC.

 * @no_reconnect: device doesn't do a reconnect after downloading the firmware,

 *  so do the warm initialization right after it

 *

 * @size_of_priv: how many bytes shall be allocated for the private field

 *  of struct dvb_usb_device.

 *

 * @power_ctrl: called to enable/disable power of the device.

 * @read_mac_address: called to read the MAC address of the device.

 * @identify_state: called to determine the state (cold or warm), when it

 *  is not distinguishable by the USB IDs.

 *

 * @rc: remote controller properties

 *

 * @i2c_algo: i2c_algorithm if the device has I2CoverUSB.

 *

 * @generic_bulk_ctrl_endpoint: most of the DVB USB devices have a generic

 *  endpoint which received control messages with bulk transfers. When this

 *  is non-zero, one can use dvb_usb_generic_rw and dvb_usb_generic_write-

 *  helper functions.

 *

 * @generic_bulk_ctrl_endpoint_response: some DVB USB devices use a separate

 *  endpoint for responses to control messages sent with bulk transfers via

 *  the generic_bulk_ctrl_endpoint. When this is non-zero, this will be used

 *  instead of the generic_bulk_ctrl_endpoint when reading usb responses in

 *  the dvb_usb_generic_rw helper function.

 *

 * @num_device_descs: number of struct dvb_usb_device_description in @devices

 * @devices: array of struct dvb_usb_device_description compatibles with these

 *  properties.

 */

#define MAX_NO_OF_ADAPTER_PER_DEVICE 2

struct dvb_usb_device_properties {

#define DVB_USB_IS_AN_I2C_ADAPTER            0x01

	int caps;

#define DEVICE_SPECIFIC 0

#define CYPRESS_AN2135  1

#define CYPRESS_AN2235  2

#define CYPRESS_FX2     3

	int        usb_ctrl;

	int        (*download_firmware) (struct usb_device *, const struct firmware *);

	const char *firmware;

	int        no_reconnect;

	int size_of_priv;

	int num_adapters;

	struct dvb_usb_adapter_properties adapter[MAX_NO_OF_ADAPTER_PER_DEVICE];

	int (*power_ctrl)       (struct dvb_usb_device *, int);

	int (*read_mac_address) (struct dvb_usb_device *, u8 []);

	int (*identify_state)   (struct usb_device *, struct dvb_usb_device_properties *,

			struct dvb_usb_device_description **, int *);

	struct {

		enum dvb_usb_mode mode;	/* Drivers shouldn't touch on it */

		struct dvb_rc_legacy legacy;

		struct dvb_rc core;

	} rc;

	struct i2c_algorithm *i2c_algo;

	int generic_bulk_ctrl_endpoint;

	int generic_bulk_ctrl_endpoint_response;

	int num_device_descs;

	struct dvb_usb_device_description devices[12];

};

/**

 * struct usb_data_stream - generic object of an USB stream

 * @buf_num: number of buffer allocated.

 * @buf_size: size of each buffer in buf_list.

 * @buf_list: array containing all allocate buffers for streaming.

 * @dma_addr: list of dma_addr_t for each buffer in buf_list.

 *

 * @urbs_initialized: number of URBs initialized.

 * @urbs_submitted: number of URBs submitted.

 */

#define MAX_NO_URBS_FOR_DATA_STREAM 10

struct usb_data_stream {

	struct usb_device                 *udev;

	struct usb_data_stream_properties  props;

#define USB_STATE_INIT    0x00

#define USB_STATE_URB_BUF 0x01

	int state;

	void (*complete) (struct usb_data_stream *, u8 *, size_t);

	struct urb    *urb_list[MAX_NO_URBS_FOR_DATA_STREAM];

	int            buf_num;

	unsigned long  buf_size;

	u8            *buf_list[MAX_NO_URBS_FOR_DATA_STREAM];

	dma_addr_t     dma_addr[MAX_NO_URBS_FOR_DATA_STREAM];

	int urbs_initialized;

	int urbs_submitted;

	void *user_priv;

};

/**

 * struct dvb_usb_adapter - a DVB adapter on a USB device

 * @id: index of this adapter (starting with 0).

 *

 * @feedcount: number of reqested feeds (used for streaming-activation)

 * @pid_filtering: is hardware pid_filtering used or not.

 *

 * @pll_addr: I2C address of the tuner for programming

 * @pll_init: array containing the initialization buffer

 * @pll_desc: pointer to the appropriate struct dvb_pll_desc

 * @tuner_pass_ctrl: called to (de)activate tuner passthru of the demod or the board

 *

 * @dvb_adap: device's dvb_adapter.

 * @dmxdev: device's dmxdev.

 * @demux: device's software demuxer.

 * @dvb_net: device's dvb_net interfaces.

 * @dvb_frontend: device's frontend.

 * @max_feed_count: how many feeds can be handled simultaneously by this

 *  device

 *

 * @fe_init:  rerouted frontend-init (wakeup) function.

 * @fe_sleep: rerouted frontend-sleep function.

 *

 * @stream: the usb data stream.

 */

struct dvb_usb_fe_adapter {

	struct dvb_frontend *fe;

	int (*fe_init)  (struct dvb_frontend *);

	int (*fe_sleep) (struct dvb_frontend *);

	struct usb_data_stream stream;

	int pid_filtering;

	int max_feed_count;

	void *priv;

};

struct dvb_usb_adapter {

	struct dvb_usb_device *dev;

	struct dvb_usb_adapter_properties props;

#define DVB_USB_ADAP_STATE_INIT 0x000

#define DVB_USB_ADAP_STATE_DVB  0x001

	int state;

	u8  id;

	int feedcount;

	/* dvb */

	struct dvb_adapter   dvb_adap;

	struct dmxdev        dmxdev;

	struct dvb_demux     demux;

	struct dvb_net       dvb_net;

	struct dvb_usb_fe_adapter fe_adap[MAX_NO_OF_FE_PER_ADAP];

	int active_fe;

	int num_frontends_initialized;

	void *priv;

};

/**

 * struct dvb_usb_device - object of a DVB USB device

 * @props: copy of the struct dvb_usb_properties this device belongs to.

 * @desc: pointer to the device's struct dvb_usb_device_description.

 * @state: initialization and runtime state of the device.

 *

 * @powered: indicated whether the device is power or not.

 *  Powered is in/decremented for each call to modify the state.

 * @udev: pointer to the device's struct usb_device.

 *

 * @usb_mutex: semaphore of USB control messages (reading needs two messages)

 * @i2c_mutex: semaphore for i2c-transfers

 *

 * @i2c_adap: device's i2c_adapter if it uses I2CoverUSB

 *

 * @rc_dev: rc device for the remote control (rc-core mode)

 * @input_dev: input device for the remote control (legacy mode)

 * @rc_query_work: struct work_struct frequent rc queries

 * @last_event: last triggered event

 * @last_state: last state (no, pressed, repeat)

 * @owner: owner of the dvb_adapter

 * @priv: private data of the actual driver (allocate by dvb-usb, size defined

 *  in size_of_priv of dvb_usb_properties).

 */

struct dvb_usb_device {

	struct dvb_usb_device_properties props;

	struct dvb_usb_device_description *desc;

	struct usb_device *udev;

#define DVB_USB_STATE_INIT        0x000

#define DVB_USB_STATE_I2C         0x001

#define DVB_USB_STATE_DVB         0x002

#define DVB_USB_STATE_REMOTE      0x004

	int state;

	int powered;

	/* locking */

	struct mutex usb_mutex;

	/* i2c */

	struct mutex i2c_mutex;

	struct i2c_adapter i2c_adap;

	int                    num_adapters_initialized;

	struct dvb_usb_adapter adapter[MAX_NO_OF_ADAPTER_PER_DEVICE];

	/* remote control */

	struct rc_dev *rc_dev;

	struct input_dev *input_dev;

	char rc_phys[64];

	struct delayed_work rc_query_work;

	u32 last_event;

	int last_state;

	struct module *owner;

	void *priv;

};

extern int dvb_usbv2_device_init(struct usb_interface *,

			       struct dvb_usb_device_properties *,

			       struct module *, struct dvb_usb_device **,

			       short *adapter_nums);

extern void dvb_usbv2_device_exit(struct usb_interface *);

/* the generic read/write method for device control */

extern int dvb_usbv2_generic_rw(struct dvb_usb_device *, u8 *, u16, u8 *, u16,int);

extern int dvb_usbv2_generic_write(struct dvb_usb_device *, u8 *, u16);

/* commonly used remote control parsing */

extern int dvb_usbv2_nec_rc_key_to_event(struct dvb_usb_device *, u8[], u32 *, int *);

/* commonly used firmware download types and function */

struct hexline {

	u8 len;

	u32 addr;

	u8 type;

	u8 data[255];

	u8 chk;

};

extern int usbv2_cypress_load_firmware(struct usb_device *udev, const struct firmware *fw, int type);

extern int dvb_usbv2_get_hexline(const struct firmware *fw, struct hexline *hx, int *pos);

#endif

/* dvb-usb-common.h is part of the DVB USB library.

 *

 * Copyright (C) 2004-5 Patrick Boettcher (patrick.boettcher@desy.de)

 * see dvb-usb-init.c for copyright information.

 *

 * a header file containing prototypes and types for internal use of the dvb-usb-lib

 */

#ifndef DVB_USB_COMMON_H

#define DVB_USB_COMMON_H

#define DVB_USB_LOG_PREFIX "dvb_usb"

#include "dvb_usb.h"

extern int dvb_usb_debug;

extern int dvb_usb_disable_rc_polling;

#define deb_info(args...)  dprintk(dvb_usb_debug,0x001,args)

#define deb_xfer(args...)  dprintk(dvb_usb_debug,0x002,args)

#define deb_pll(args...)   dprintk(dvb_usb_debug,0x004,args)

#define deb_ts(args...)    dprintk(dvb_usb_debug,0x008,args)

#define deb_err(args...)   dprintk(dvb_usb_debug,0x010,args)

#define deb_rc(args...)    dprintk(dvb_usb_debug,0x020,args)

#define deb_fw(args...)    dprintk(dvb_usb_debug,0x040,args)

#define deb_mem(args...)   dprintk(dvb_usb_debug,0x080,args)

#define deb_uxfer(args...) dprintk(dvb_usb_debug,0x100,args)

/* commonly used  methods */

extern int dvb_usb_download_firmware(struct usb_device *, struct dvb_usb_device_properties *);

extern int dvb_usb_device_power_ctrl(struct dvb_usb_device *d, int onoff);

extern int usb_urb_init(struct usb_data_stream *stream, struct usb_data_stream_properties *props);

extern int usb_urb_exit(struct usb_data_stream *stream);

extern int usb_urb_submit(struct usb_data_stream *stream);

extern int usb_urb_kill(struct usb_data_stream *stream);

extern int dvb_usb_adapter_stream_init(struct dvb_usb_adapter *adap);

extern int dvb_usb_adapter_stream_exit(struct dvb_usb_adapter *adap);

extern int dvb_usb_i2c_init(struct dvb_usb_device *);

extern int dvb_usb_i2c_exit(struct dvb_usb_device *);

extern int dvb_usb_adapter_dvb_init(struct dvb_usb_adapter *adap,

				    short *adapter_nums);

extern int dvb_usb_adapter_dvb_exit(struct dvb_usb_adapter *adap);

extern int dvb_usb_adapter_frontend_init(struct dvb_usb_adapter *adap);

extern int dvb_usb_adapter_frontend_exit(struct dvb_usb_adapter *adap);

extern int dvb_usb_remote_init(struct dvb_usb_device *);

extern int dvb_usb_remote_exit(struct dvb_usb_device *);

#endif

/* dvb-usb-firmware.c is part of the DVB USB library.

 *

 * Copyright (C) 2004-6 Patrick Boettcher (patrick.boettcher@desy.de)

 * see dvb-usb-init.c for copyright information.

 *

 * This file contains functions for downloading the firmware to Cypress FX 1 and 2 based devices.

 *

 * FIXME: This part does actually not belong to dvb-usb, but to the usb-subsystem.

 */

#include "dvb_usb_common.h"

#include <linux/usb.h>

struct usb_cypress_controller {

	int id;

	const char *name;       /* name of the usb controller */

	u16 cpu_cs_register;    /* needs to be restarted, when the firmware has been downloaded. */

};

static struct usb_cypress_controller cypress[] = {

	{ .id = DEVICE_SPECIFIC, .name = "Device specific", .cpu_cs_register = 0 },

	{ .id = CYPRESS_AN2135,  .name = "Cypress AN2135",  .cpu_cs_register = 0x7f92 },

	{ .id = CYPRESS_AN2235,  .name = "Cypress AN2235",  .cpu_cs_register = 0x7f92 },

	{ .id = CYPRESS_FX2,     .name = "Cypress FX2",     .cpu_cs_register = 0xe600 },

};

/*

 * load a firmware packet to the device

 */

static int usb_cypress_writemem(struct usb_device *udev,u16 addr,u8 *data, u8 len)

{

	return usb_control_msg(udev, usb_sndctrlpipe(udev,0),

			0xa0, USB_TYPE_VENDOR, addr, 0x00, data, len, 5000);

}

int usbv2_cypress_load_firmware(struct usb_device *udev, const struct firmware *fw, int type)

{

	struct hexline hx;

	u8 reset;

	int ret,pos=0;

	/* stop the CPU */

	reset = 1;

	if ((ret = usb_cypress_writemem(udev,cypress[type].cpu_cs_register,&reset,1)) != 1)

		err("could not stop the USB controller CPU.");

	while ((ret = dvb_usbv2_get_hexline(fw,&hx,&pos)) > 0) {

		deb_fw("writing to address 0x%04x (buffer: 0x%02x %02x)\n",hx.addr,hx.len,hx.chk);

		ret = usb_cypress_writemem(udev,hx.addr,hx.data,hx.len);

		if (ret != hx.len) {

			err("error while transferring firmware "

				"(transferred size: %d, block size: %d)",

				ret,hx.len);

			ret = -EINVAL;

			break;

		}

	}

	if (ret < 0) {

		err("firmware download failed at %d with %d",pos,ret);

		return ret;

	}

	if (ret == 0) {

		/* restart the CPU */

		reset = 0;

		if (ret || usb_cypress_writemem(udev,cypress[type].cpu_cs_register,&reset,1) != 1) {

			err("could not restart the USB controller CPU.");

			ret = -EINVAL;

		}

	} else

		ret = -EIO;

	return ret;

}

EXPORT_SYMBOL(usbv2_cypress_load_firmware);

int dvb_usb_download_firmware(struct usb_device *udev, struct dvb_usb_device_properties *props)

{

	int ret;

	const struct firmware *fw = NULL;

	if ((ret = request_firmware(&fw, props->firmware, &udev->dev)) != 0) {

		err("did not find the firmware file. (%s) "

			"Please see linux/Documentation/dvb/ for more details on firmware-problems. (%d)",

			props->firmware,ret);

		return ret;

	}

	info("downloading firmware from file '%s'",props->firmware);

	switch (props->usb_ctrl) {

		case CYPRESS_AN2135:

		case CYPRESS_AN2235:

		case CYPRESS_FX2:

			ret = usbv2_cypress_load_firmware(udev, fw, props->usb_ctrl);

			break;

		case DEVICE_SPECIFIC:

			if (props->download_firmware)

				ret = props->download_firmware(udev,fw);

			else {

				err("BUG: driver didn't specified a download_firmware-callback, although it claims to have a DEVICE_SPECIFIC one.");

				ret = -EINVAL;

			}

			break;

		default:

			ret = -EINVAL;

			break;

	}

	release_firmware(fw);

	return ret;

}

int dvb_usbv2_get_hexline(const struct firmware *fw, struct hexline *hx,

			       int *pos)

{

	u8 *b = (u8 *) &fw->data[*pos];

	int data_offs = 4;

	if (*pos >= fw->size)

		return 0;

	memset(hx,0,sizeof(struct hexline));

	hx->len  = b[0];

	if ((*pos + hx->len + 4) >= fw->size)

		return -EINVAL;

	hx->addr = b[1] | (b[2] << 8);

	hx->type = b[3];

	if (hx->type == 0x04) {

		/* b[4] and b[5] are the Extended linear address record data field */

		hx->addr |= (b[4] << 24) | (b[5] << 16);

/*		hx->len -= 2;

		data_offs += 2; */

	}

	memcpy(hx->data,&b[data_offs],hx->len);

	hx->chk = b[hx->len + data_offs];

	*pos += hx->len + 5;

	return *pos;

}

EXPORT_SYMBOL(dvb_usbv2_get_hexline);

/* dvb-usb-i2c.c is part of the DVB USB library.

 *

 * Copyright (C) 2004-6 Patrick Boettcher (patrick.boettcher@desy.de)

 * see dvb-usb-init.c for copyright information.

 *

 * This file contains functions for (de-)initializing an I2C adapter.

 */

#include "dvb_usb_common.h"

int dvb_usb_i2c_init(struct dvb_usb_device *d)

{

	int ret = 0;

	if (!(d->props.caps & DVB_USB_IS_AN_I2C_ADAPTER))

		return 0;

	if (d->props.i2c_algo == NULL) {

		err("no i2c algorithm specified");

		return -EINVAL;

	}

	strlcpy(d->i2c_adap.name, d->desc->name, sizeof(d->i2c_adap.name));

	d->i2c_adap.algo      = d->props.i2c_algo;

	d->i2c_adap.algo_data = NULL;

	d->i2c_adap.dev.parent = &d->udev->dev;

	i2c_set_adapdata(&d->i2c_adap, d);

	if ((ret = i2c_add_adapter(&d->i2c_adap)) < 0)

		err("could not add i2c adapter");

	d->state |= DVB_USB_STATE_I2C;

	return ret;

}

int dvb_usb_i2c_exit(struct dvb_usb_device *d)

{

	if (d->state & DVB_USB_STATE_I2C)

		i2c_del_adapter(&d->i2c_adap);

	d->state &= ~DVB_USB_STATE_I2C;

	return 0;

}