path: root/drivers/media/pci/saa7164/saa7164.h

/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
 *  Driver for the NXP SAA7164 PCIe bridge
 *
 *  Copyright (c) 2010-2015 Steven Toth <stoth@kernellabs.com>
 */

/*
	Driver architecture
	*******************

	saa7164_core.c/buffer.c/cards.c/i2c.c/dvb.c
		|	: Standard Linux driver framework for creating
		|	: exposing and managing interfaces to the rest
		|	: of the kernel or userland. Also uses _fw.c to load
		|	: firmware direct into the PCIe bus, bypassing layers.
		V
	saa7164_api..()	: Translate kernel specific functions/features
		|	: into command buffers.
		V
	saa7164_cmd..()	: Manages the flow of command packets on/off,
		|	: the bus. Deal with bus errors, timeouts etc.
		V
	saa7164_bus..() : Manage a read/write memory ring buffer in the
		|	: PCIe Address space.
		|
		|		saa7164_fw...()	: Load any frimware
		|			|	: direct into the device
		V			V
	<- ----------------- PCIe address space -------------------- ->
*/

#include <linux/pci.h>
#include <linux/i2c.h>
#include <linux/kdev_t.h>
#include <linux/mutex.h>
#include <linux/crc32.h>
#include <linux/kthread.h>
#include <linux/freezer.h>

#include <media/tuner.h>
#include <media/tveeprom.h>
#include <media/dvb_demux.h>
#include <media/dvb_frontend.h>
#include <media/dvb_net.h>
#include <media/dvbdev.h>
#include <media/dmxdev.h>
#include <media/v4l2-common.h>
#include <media/v4l2-ioctl.h>
#include <media/v4l2-device.h>
#include <media/v4l2-ctrls.h>
#include <media/v4l2-event.h>

#include "saa7164-reg.h"
#include "saa7164-types.h"

#define SAA7164_MAXBOARDS 8

#define UNSET (-1U)
#define SAA7164_BOARD_NOAUTO			UNSET
#define SAA7164_BOARD_UNKNOWN			0
#define SAA7164_BOARD_UNKNOWN_REV2		1
#define SAA7164_BOARD_UNKNOWN_REV3		2
#define SAA7164_BOARD_HAUPPAUGE_HVR2250		3
#define SAA7164_BOARD_HAUPPAUGE_HVR2200		4
#define SAA7164_BOARD_HAUPPAUGE_HVR2200_2	5
#define SAA7164_BOARD_HAUPPAUGE_HVR2200_3	6
#define SAA7164_BOARD_HAUPPAUGE_HVR2250_2	7
#define SAA7164_BOARD_HAUPPAUGE_HVR2250_3	8
#define SAA7164_BOARD_HAUPPAUGE_HVR2200_4	9
#define SAA7164_BOARD_HAUPPAUGE_HVR2200_5	10
#define SAA7164_BOARD_HAUPPAUGE_HVR2255proto	11
#define SAA7164_BOARD_HAUPPAUGE_HVR2255		12
#define SAA7164_BOARD_HAUPPAUGE_HVR2205		13

#define SAA7164_MAX_UNITS		8
#define SAA7164_TS_NUMBER_OF_LINES	312
#define SAA7164_PS_NUMBER_OF_LINES	256
#define SAA7164_PT_ENTRIES		16 /* (312 * 188) / 4096 */
#define SAA7164_MAX_ENCODER_BUFFERS	64 /* max 5secs of latency at 6Mbps */
#define SAA7164_MAX_VBI_BUFFERS		64

/* Port related defines */
#define SAA7164_PORT_TS1	(0)
#define SAA7164_PORT_TS2	(SAA7164_PORT_TS1 + 1)
#define SAA7164_PORT_ENC1	(SAA7164_PORT_TS2 + 1)
#define SAA7164_PORT_ENC2	(SAA7164_PORT_ENC1 + 1)
#define SAA7164_PORT_VBI1	(SAA7164_PORT_ENC2 + 1)
#define SAA7164_PORT_VBI2	(SAA7164_PORT_VBI1 + 1)
#define SAA7164_MAX_PORTS	(SAA7164_PORT_VBI2 + 1)

#define DBGLVL_FW    4
#define DBGLVL_DVB   8
#define DBGLVL_I2C  16
#define DBGLVL_API  32
#define DBGLVL_CMD  64
#define DBGLVL_BUS 128
#define DBGLVL_IRQ 256
#define DBGLVL_BUF 512
#define DBGLVL_ENC 1024
#define DBGLVL_VBI 2048
#define DBGLVL_THR 4096
#define DBGLVL_CPU 8192

#define SAA7164_NORMS \
	(V4L2_STD_NTSC_M | V4L2_STD_NTSC_M_JP)

/* TV frequency range copied from tuner-core.c */
#define SAA7164_TV_MIN_FREQ (44U * 16U)
#define SAA7164_TV_MAX_FREQ (958U * 16U)

enum port_t {
	SAA7164_MPEG_UNDEFINED = 0,
	SAA7164_MPEG_DVB,
	SAA7164_MPEG_ENCODER,
	SAA7164_MPEG_VBI,
};

enum saa7164_i2c_bus_nr {
	SAA7164_I2C_BUS_0 = 0,
	SAA7164_I2C_BUS_1,
	SAA7164_I2C_BUS_2,
};

enum saa7164_buffer_flags {
	SAA7164_BUFFER_UNDEFINED = 0,
	SAA7164_BUFFER_FREE,
	SAA7164_BUFFER_BUSY,
	SAA7164_BUFFER_FULL
};

enum saa7164_unit_type {
	SAA7164_UNIT_UNDEFINED = 0,
	SAA7164_UNIT_DIGITAL_DEMODULATOR,
	SAA7164_UNIT_ANALOG_DEMODULATOR,
	SAA7164_UNIT_TUNER,
	SAA7164_UNIT_EEPROM,
	SAA7164_UNIT_ZILOG_IRBLASTER,
	SAA7164_UNIT_ENCODER,
};

/* The PCIe bridge doesn't grant direct access to i2c.
 * Instead, you address i2c devices using a uniqely
 * allocated 'unitid' value via a messaging API. This
 * is a problem. The kernel and existing demod/tuner
 * drivers expect to talk 'i2c', so we have to maintain
 * a translation layer, and a series of functions to
 * convert i2c bus + device address into a unit id.
 */
struct saa7164_unit {
	enum saa7164_unit_type type;
	u8	id;
	char	*name;
	enum saa7164_i2c_bus_nr i2c_bus_nr;
	u8	i2c_bus_addr;
	u8	i2c_reg_len;
};

struct saa7164_board {
	char	*name;
	enum port_t porta, portb, portc,
		portd, porte, portf;
	enum {
		SAA7164_CHIP_UNDEFINED = 0,
		SAA7164_CHIP_REV2,
		SAA7164_CHIP_REV3,
	} chiprev;
	struct	saa7164_unit unit[SAA7164_MAX_UNITS];
};

struct saa7164_subid {
	u16     subvendor;
	u16     subdevice;
	u32     card;
};

struct saa7164_encoder_fh {
	struct v4l2_fh fh;
	struct saa7164_port *port;
	atomic_t v4l_reading;
};

struct saa7164_vbi_fh {
	struct v4l2_fh fh;
	struct saa7164_port *port;
	atomic_t v4l_reading;
};

struct saa7164_histogram_bucket {
	u32 val;
	u32 count;
	u64 update_time;
};

struct saa7164_histogram {
	char name[32];
	struct saa7164_histogram_bucket counter1[64];
};

struct saa7164_user_buffer {
	struct list_head list;

	/* Attributes */
	u8  *data;
	u32 pos;
	u32 actual_size;

	u32 crc;
};

struct saa7164_fw_status {

	/* RISC Core details */
	u32	status;
	u32	mode;
	u32	spec;
	u32	inst;
	u32	cpuload;
	u32	remainheap;

	/* Firmware version */
	u32	version;
	u32	major;
	u32	sub;
	u32	rel;
	u32	buildnr;
};

struct saa7164_dvb {
	struct mutex lock;
	struct dvb_adapter adapter;
	struct dvb_frontend *frontend;
	struct dvb_demux demux;
	struct dmxdev dmxdev;
	struct dmx_frontend fe_hw;
	struct dmx_frontend fe_mem;
	struct dvb_net net;
	int feeding;
};

struct saa7164_i2c {
	struct saa7164_dev		*dev;

	enum saa7164_i2c_bus_nr		nr;

	/* I2C I/O */
	struct i2c_adapter		i2c_adap;
	struct i2c_client		i2c_client;
	u32				i2c_rc;
};

struct saa7164_tvnorm {
	char		*name;
	v4l2_std_id	id;
};

struct saa7164_encoder_params {
	struct saa7164_tvnorm encodernorm;
	u32 height;
	u32 width;
	u32 is_50hz;
	u32 bitrate; /* bps */
	u32 bitrate_peak; /* bps */
	u32 bitrate_mode;
	u32 stream_type; /* V4L2_MPEG_STREAM_TYPE_MPEG2_TS */

	u32 audio_sampling_freq;
	u32 ctl_mute;
	u32 ctl_aspect;
	u32 refdist;
	u32 gop_size;
};

struct saa7164_vbi_params {
	struct saa7164_tvnorm encodernorm;
	u32 height;
	u32 width;
	u32 is_50hz;
	u32 bitrate; /* bps */
	u32 bitrate_peak; /* bps */
	u32 bitrate_mode;
	u32 stream_type; /* V4L2_MPEG_STREAM_TYPE_MPEG2_TS */

	u32 audio_sampling_freq;
	u32 ctl_mute;
	u32 ctl_aspect;
	u32 refdist;
	u32 gop_size;
};

struct saa7164_port;

struct saa7164_buffer {
	struct list_head list;

	/* Note of which h/w buffer list index position we occupy */
	int idx;

	struct saa7164_port *port;

	/* Hardware Specific */
	/* PCI Memory allocations */
	enum saa7164_buffer_flags flags; /* Free, Busy, Full */

	/* A block of page align PCI memory */
	u32 pci_size;	/* PCI allocation size in bytes */
	u64 *cpu;	/* Virtual address */
	dma_addr_t dma;	/* Physical address */
	u32 crc;	/* Checksum for the entire buffer data */

	/* A page table that splits the block into a number of entries */
	u32 pt_size;		/* PCI allocation size in bytes */
	u64 *pt_cpu;		/* Virtual address */
	dma_addr_t pt_dma;	/* Physical address */

	/* Encoder fops */
	u32 pos;
	u32 actual_size;
};

struct saa7164_port {

	struct saa7164_dev *dev;
	enum port_t type;
	int nr;

	/* --- Generic port attributes --- */

	/* HW stream parameters */
	struct tmHWStreamParameters hw_streamingparams;

	/* DMA configuration values, is seeded during initialization */
	struct tmComResDMATermDescrHeader hwcfg;

	/* hardware specific registers */
	u32 bufcounter;
	u32 pitch;
	u32 bufsize;
	u32 bufoffset;
	u32 bufptr32l;
	u32 bufptr32h;
	u64 bufptr64;

	u32 numpte;	/* Number of entries in array, only valid in head */

	struct mutex dmaqueue_lock;
	struct saa7164_buffer dmaqueue;

	u64 last_irq_msecs, last_svc_msecs;
	u64 last_irq_msecs_diff, last_svc_msecs_diff;
	u32 last_svc_wp;
	u32 last_svc_rp;
	u64 last_irq_svc_msecs_diff;
	u64 last_read_msecs, last_read_msecs_diff;
	u64 last_poll_msecs, last_poll_msecs_diff;

	struct saa7164_histogram irq_interval;
	struct saa7164_histogram svc_interval;
	struct saa7164_histogram irq_svc_interval;
	struct saa7164_histogram read_interval;
	struct saa7164_histogram poll_interval;

	/* --- DVB Transport Specific --- */
	struct saa7164_dvb dvb;
	struct i2c_client