asgardius/android_kernel_motorola_sm6225
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions
android_kernel_motorola_sm6225/drivers/media/video/em28xx/em28xx.h
Mauro Carvalho Chehab 3687e1e67e V4L/DVB (7179): Allow more than one em28xx board 
em28xx driver is capable of handling more than one usb device. However, isoc
transfers require a large amount of data to be transfered.

Before this patch, just one em28xx board were enough to allocate more than 50%
URBs:

T:  Bus=02 Lev=00 Prnt=00 Port=00 Cnt=00 Dev#=  1 Spd=480 MxCh= 8
B:  Alloc=480/800 us (60%), #Int=  0, #Iso=  2
D:  Ver= 2.00 Cls=09(hub  ) Sub=00 Prot=01 MxPS=64 #Cfgs=  1

So, only one board could use an USB host at the same time. After the patch, it
is possible to use more than one em28xx at the same time, on the same usb host,
if the image size is slower or equal to 345600, since those images will
require about 30% of the URBs:

T:  Bus=02 Lev=00 Prnt=00 Port=00 Cnt=00 Dev#=  1 Spd=480 MxCh= 8
B:  Alloc=232/800 us (29%), #Int=  0, #Iso=  2
D:  Ver= 2.00 Cls=09(hub  ) Sub=00 Prot=01 MxPS=64 #Cfgs=  1

So, in thesis, after the patch, it would be possible to use up to 3 boards by
each usb host, if the devices are generating small images.

Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
2008-02-18 11:15:17 -03:00

547 lines
14 KiB
C
Raw Blame History

/*
em28xx.h - driver for Empia EM2800/EM2820/2840 USB video capture devices
Copyright (C) 2005 Markus Rechberger <mrechberger@gmail.com>
Ludovico Cavedon <cavedon@sssup.it>
Mauro Carvalho Chehab <mchehab@infradead.org>
Based on the em2800 driver from Sascha Sommer <saschasommer@freenet.de>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#ifndef _EM28XX_H
#define _EM28XX_H
#include <linux/videodev2.h>
#include <linux/i2c.h>
#include <linux/mutex.h>
#include <media/ir-kbd-i2c.h>
#define UNSET -1
/* maximum number of em28xx boards */
#define EM28XX_MAXBOARDS 4 /*FIXME: should be bigger */
/* maximum number of frames that can be queued */
#define EM28XX_NUM_FRAMES 5
/* number of frames that get used for v4l2_read() */
#define EM28XX_NUM_READ_FRAMES 2
/* number of buffers for isoc transfers */
#define EM28XX_NUM_BUFS 5
/* number of packets for each buffer
windows requests only 40 packets .. so we better do the same
this is what I found out for all alternate numbers there!
*/
#define EM28XX_NUM_PACKETS 40
/* default alternate; 0 means choose the best */
#define EM28XX_PINOUT 0
#define EM28XX_INTERLACED_DEFAULT 1
/*
#define (use usbview if you want to get the other alternate number infos)
#define
#define alternate number 2
#define Endpoint Address: 82
Direction: in
Attribute: 1
Type: Isoc
Max Packet Size: 1448
Interval: 125us
alternate number 7
Endpoint Address: 82
Direction: in
Attribute: 1
Type: Isoc
Max Packet Size: 3072
Interval: 125us
*/
/* time to wait when stopping the isoc transfer */
#define EM28XX_URB_TIMEOUT msecs_to_jiffies(EM28XX_NUM_BUFS * EM28XX_NUM_PACKETS)
/* time in msecs to wait for i2c writes to finish */
#define EM2800_I2C_WRITE_TIMEOUT 20
/* the various frame states */
enum em28xx_frame_state {
F_UNUSED = 0,
F_QUEUED,
F_GRABBING,
F_DONE,
F_ERROR,
};
/* stream states */
enum em28xx_stream_state {
STREAM_OFF,
STREAM_INTERRUPT,
STREAM_ON,
};
/* frames */
struct em28xx_frame_t {
void *bufmem;
struct v4l2_buffer buf;
enum em28xx_frame_state state;
struct list_head frame;
unsigned long vma_use_count;
int top_field;
int fieldbytesused;
};
/* io methods */
enum em28xx_io_method {
IO_NONE,
IO_READ,
IO_MMAP,
};
/* inputs */
#define MAX_EM28XX_INPUT 4
enum enum28xx_itype {
EM28XX_VMUX_COMPOSITE1 = 1,
EM28XX_VMUX_COMPOSITE2,
EM28XX_VMUX_COMPOSITE3,
EM28XX_VMUX_COMPOSITE4,
EM28XX_VMUX_SVIDEO,
EM28XX_VMUX_TELEVISION,
EM28XX_VMUX_CABLE,
EM28XX_VMUX_DVB,
EM28XX_VMUX_DEBUG,
EM28XX_RADIO,
};
enum em28xx_amux {
EM28XX_AMUX_VIDEO,
EM28XX_AMUX_LINE_IN,
EM28XX_AMUX_AC97_VIDEO,
EM28XX_AMUX_AC97_LINE_IN,
};
struct em28xx_input {
enum enum28xx_itype type;
unsigned int vmux;
enum em28xx_amux amux;
};
#define INPUT(nr) (&em28xx_boards[dev->model].input[nr])
enum em28xx_decoder {
EM28XX_TVP5150,
EM28XX_SAA7113,
EM28XX_SAA7114
};
struct em28xx_board {
char *name;
int vchannels;
int tuner_type;
/* i2c flags */
unsigned int tda9887_conf;
unsigned int is_em2800:1;
unsigned int has_msp34xx:1;
unsigned int mts_firmware:1;
unsigned int has_12mhz_i2s:1;
unsigned int max_range_640_480:1;
unsigned int analog_gpio;
enum em28xx_decoder decoder;
struct em28xx_input input[MAX_EM28XX_INPUT];
struct em28xx_input radio;
};
struct em28xx_eeprom {
u32 id; /* 0x9567eb1a */
u16 vendor_ID;
u16 product_ID;
u16 chip_conf;
u16 board_conf;
u16 string1, string2, string3;
u8 string_idx_table;
};
/* device states */
enum em28xx_dev_state {
DEV_INITIALIZED = 0x01,
DEV_DISCONNECTED = 0x02,
DEV_MISCONFIGURED = 0x04,
};
#define EM28XX_AUDIO_BUFS 5
#define EM28XX_NUM_AUDIO_PACKETS 64
#define EM28XX_AUDIO_MAX_PACKET_SIZE 196 /* static value */
#define EM28XX_CAPTURE_STREAM_EN 1
#define EM28XX_AUDIO 0x10
struct em28xx_audio {
char name[50];
char *transfer_buffer[EM28XX_AUDIO_BUFS];
struct urb *urb[EM28XX_AUDIO_BUFS];
struct usb_device *udev;
unsigned int capture_transfer_done;
struct snd_pcm_substream *capture_pcm_substream;
unsigned int hwptr_done_capture;
struct snd_card *sndcard;
int users, shutdown;
enum em28xx_stream_state capture_stream;
spinlock_t slock;
};
/* main device struct */
struct em28xx {
/* generic device properties */
char name[30]; /* name (including minor) of the device */
int model; /* index in the device_data struct */
int devno; /* marks the number of this device */
unsigned int analog_gpio;
unsigned int is_em2800:1;
unsigned int has_msp34xx:1;
unsigned int has_tda9887:1;
unsigned int stream_on:1; /* Locks streams */
unsigned int has_audio_class:1;
unsigned int has_12mhz_i2s:1;
unsigned int max_range_640_480:1;
int video_inputs; /* number of video inputs */
struct list_head devlist;
u32 i2s_speed; /* I2S speed for audio digital stream */
enum em28xx_decoder decoder;
int tuner_type; /* type of the tuner */
int tuner_addr; /* tuner address */
int tda9887_conf;
/* i2c i/o */
struct i2c_adapter i2c_adap;
struct i2c_client i2c_client;
/* video for linux */
int users; /* user count for exclusive use */
struct video_device *vdev; /* video for linux device struct */
v4l2_std_id norm; /* selected tv norm */
int ctl_freq; /* selected frequency */
unsigned int ctl_input; /* selected input */
unsigned int ctl_ainput; /* slected audio input */
int mute;
int volume;
/* frame properties */
struct em28xx_frame_t frame[EM28XX_NUM_FRAMES]; /* list of frames */
int num_frames; /* number of frames currently in use */
unsigned int frame_count; /* total number of transfered frames */
struct em28xx_frame_t *frame_current; /* the frame that is being filled */
int width; /* current frame width */
int height; /* current frame height */
int frame_size; /* current frame size */
int field_size; /* current field size */
int bytesperline;
int hscale; /* horizontal scale factor (see datasheet) */
int vscale; /* vertical scale factor (see datasheet) */
int interlaced; /* 1=interlace fileds, 0=just top fileds */
int type;
unsigned int video_bytesread; /* Number of bytes read */
unsigned long hash; /* eeprom hash - for boards with generic ID */
unsigned long i2c_hash; /* i2c devicelist hash - for boards with generic ID */
struct em28xx_audio *adev;
/* states */
enum em28xx_dev_state state;
enum em28xx_stream_state stream;
enum em28xx_io_method io;
struct work_struct request_module_wk;
/* locks */
struct mutex lock;
spinlock_t queue_lock;
struct list_head inqueue, outqueue;
wait_queue_head_t open, wait_frame, wait_stream;
struct video_device *vbi_dev;
struct video_device *radio_dev;
unsigned char eedata[256];
/* usb transfer */
struct usb_device *udev; /* the usb device */
int alt; /* alternate */
int max_pkt_size; /* max packet size of isoc transaction */
int num_alt; /* Number of alternative settings */
unsigned int *alt_max_pkt_size; /* array of wMaxPacketSize */
struct urb *urb[EM28XX_NUM_BUFS]; /* urb for isoc transfers */
char *transfer_buffer[EM28XX_NUM_BUFS]; /* transfer buffers for isoc transfer */
/* helper funcs that call usb_control_msg */
int (*em28xx_write_regs) (struct em28xx * dev, u16 reg, char *buf,
int len);
int (*em28xx_read_reg) (struct em28xx * dev, u16 reg);
int (*em28xx_read_reg_req_len) (struct em28xx * dev, u8 req, u16 reg,
char *buf, int len);
int (*em28xx_write_regs_req) (struct em28xx * dev, u8 req, u16 reg,
char *buf, int len);
int (*em28xx_read_reg_req) (struct em28xx * dev, u8 req, u16 reg);
};
struct em28xx_fh {
struct em28xx *dev;
unsigned int stream_on:1; /* Locks streams */
int radio;
};
struct em28xx_ops {
struct list_head next;
char *name;
int id;
int (*init)(struct em28xx *);
int (*fini)(struct em28xx *);
};
/* Provided by em28xx-i2c.c */
void em28xx_i2c_call_clients(struct em28xx *dev, unsigned int cmd, void *arg);
void em28xx_do_i2c_scan(struct em28xx *dev);
int em28xx_i2c_register(struct em28xx *dev);
int em28xx_i2c_unregister(struct em28xx *dev);
/* Provided by em28xx-core.c */
u32 em28xx_request_buffers(struct em28xx *dev, u32 count);
void em28xx_queue_unusedframes(struct em28xx *dev);
void em28xx_release_buffers(struct em28xx *dev);
int em28xx_read_reg_req_len(struct em28xx *dev, u8 req, u16 reg,
char *buf, int len);
int em28xx_read_reg_req(struct em28xx *dev, u8 req, u16 reg);
int em28xx_read_reg(struct em28xx *dev, u16 reg);
int em28xx_write_regs_req(struct em28xx *dev, u8 req, u16 reg, char *buf,
int len);
int em28xx_write_regs(struct em28xx *dev, u16 reg, char *buf, int len);
int em28xx_audio_analog_set(struct em28xx *dev);
int em28xx_colorlevels_set_default(struct em28xx *dev);
int em28xx_capture_start(struct em28xx *dev, int start);
int em28xx_outfmt_set_yuv422(struct em28xx *dev);
int em28xx_resolution_set(struct em28xx *dev);
int em28xx_init_isoc(struct em28xx *dev);
void em28xx_uninit_isoc(struct em28xx *dev);
int em28xx_set_alternate(struct em28xx *dev);
/* Provided by em28xx-video.c */
int em28xx_register_extension(struct em28xx_ops *dev);
void em28xx_unregister_extension(struct em28xx_ops *dev);
/* Provided by em28xx-cards.c */
extern int em2800_variant_detect(struct usb_device* udev,int model);
extern void em28xx_pre_card_setup(struct em28xx *dev);
extern void em28xx_card_setup(struct em28xx *dev);
extern struct em28xx_board em28xx_boards[];
extern struct usb_device_id em28xx_id_table[];
extern const unsigned int em28xx_bcount;
void em28xx_set_ir(struct em28xx *dev, struct IR_i2c *ir);
/* Provided by em28xx-input.c */
/* TODO: Check if the standard get_key handlers on ir-common can be used */
int em28xx_get_key_terratec(struct IR_i2c *ir, u32 *ir_key, u32 *ir_raw);
int em28xx_get_key_em_haup(struct IR_i2c *ir, u32 *ir_key, u32 *ir_raw);
int em28xx_get_key_pinnacle_usb_grey(struct IR_i2c *ir, u32 *ir_key,
u32 *ir_raw);
/* em2800 registers */
#define EM2800_AUDIOSRC_REG 0x08
/* em28xx registers */
#define I2C_CLK_REG 0x06
#define CHIPID_REG 0x0a
#define USBSUSP_REG 0x0c /* */
#define AUDIOSRC_REG 0x0e
#define XCLK_REG 0x0f
#define VINMODE_REG 0x10
#define VINCTRL_REG 0x11
#define VINENABLE_REG 0x12 /* */
#define GAMMA_REG 0x14
#define RGAIN_REG 0x15
#define GGAIN_REG 0x16
#define BGAIN_REG 0x17
#define ROFFSET_REG 0x18
#define GOFFSET_REG 0x19
#define BOFFSET_REG 0x1a
#define OFLOW_REG 0x1b
#define HSTART_REG 0x1c
#define VSTART_REG 0x1d
#define CWIDTH_REG 0x1e
#define CHEIGHT_REG 0x1f
#define YGAIN_REG 0x20
#define YOFFSET_REG 0x21
#define UVGAIN_REG 0x22
#define UOFFSET_REG 0x23
#define VOFFSET_REG 0x24
#define SHARPNESS_REG 0x25
#define COMPR_REG 0x26
#define OUTFMT_REG 0x27
#define XMIN_REG 0x28
#define XMAX_REG 0x29
#define YMIN_REG 0x2a
#define YMAX_REG 0x2b
#define HSCALELOW_REG 0x30
#define HSCALEHIGH_REG 0x31
#define VSCALELOW_REG 0x32
#define VSCALEHIGH_REG 0x33
#define AC97LSB_REG 0x40
#define AC97MSB_REG 0x41
#define AC97ADDR_REG 0x42
#define AC97BUSY_REG 0x43
/* em202 registers */
#define MASTER_AC97 0x02
#define LINE_IN_AC97 0x10
#define VIDEO_AC97 0x14
/* register settings */
#define EM2800_AUDIO_SRC_TUNER 0x0d
#define EM2800_AUDIO_SRC_LINE 0x0c
#define EM28XX_AUDIO_SRC_TUNER 0xc0
#define EM28XX_AUDIO_SRC_LINE 0x80
/* printk macros */
#define em28xx_err(fmt, arg...) do {\
printk(KERN_ERR fmt , ##arg); } while (0)
#define em28xx_errdev(fmt, arg...) do {\
printk(KERN_ERR "%s: "fmt,\
dev->name , ##arg); } while (0)
#define em28xx_info(fmt, arg...) do {\
printk(KERN_INFO "%s: "fmt,\
dev->name , ##arg); } while (0)
#define em28xx_warn(fmt, arg...) do {\
printk(KERN_WARNING "%s: "fmt,\
dev->name , ##arg); } while (0)
inline static int em28xx_compression_disable(struct em28xx *dev)
{
/* side effect of disabling scaler and mixer */
return em28xx_write_regs(dev, COMPR_REG, "\x00", 1);
}
inline static int em28xx_contrast_get(struct em28xx *dev)
{
return em28xx_read_reg(dev, YGAIN_REG) & 0x1f;
}
inline static int em28xx_brightness_get(struct em28xx *dev)
{
return em28xx_read_reg(dev, YOFFSET_REG);
}
inline static int em28xx_saturation_get(struct em28xx *dev)
{
return em28xx_read_reg(dev, UVGAIN_REG) & 0x1f;
}
inline static int em28xx_u_balance_get(struct em28xx *dev)
{
return em28xx_read_reg(dev, UOFFSET_REG);
}
inline static int em28xx_v_balance_get(struct em28xx *dev)
{
return em28xx_read_reg(dev, VOFFSET_REG);
}
inline static int em28xx_gamma_get(struct em28xx *dev)
{
return em28xx_read_reg(dev, GAMMA_REG) & 0x3f;
}
inline static int em28xx_contrast_set(struct em28xx *dev, s32 val)
{
u8 tmp = (u8) val;
return em28xx_write_regs(dev, YGAIN_REG, &tmp, 1);
}
inline static int em28xx_brightness_set(struct em28xx *dev, s32 val)
{
u8 tmp = (u8) val;
return em28xx_write_regs(dev, YOFFSET_REG, &tmp, 1);
}
inline static int em28xx_saturation_set(struct em28xx *dev, s32 val)
{
u8 tmp = (u8) val;
return em28xx_write_regs(dev, UVGAIN_REG, &tmp, 1);
}
inline static int em28xx_u_balance_set(struct em28xx *dev, s32 val)
{
u8 tmp = (u8) val;
return em28xx_write_regs(dev, UOFFSET_REG, &tmp, 1);
}
inline static int em28xx_v_balance_set(struct em28xx *dev, s32 val)
{
u8 tmp = (u8) val;
return em28xx_write_regs(dev, VOFFSET_REG, &tmp, 1);
}
inline static int em28xx_gamma_set(struct em28xx *dev, s32 val)
{
u8 tmp = (u8) val;
return em28xx_write_regs(dev, GAMMA_REG, &tmp, 1);
}
/*FIXME: maxw should be dependent of alt mode */
inline static unsigned int norm_maxw(struct em28xx *dev)
{
if (dev->max_range_640_480)
return 640;
else
return 720;
}
inline static unsigned int norm_maxh(struct em28xx *dev)
{
if (dev->max_range_640_480)
return 480;
else
return (dev->norm & V4L2_STD_625_50) ? 576 : 480;
}
#endif
Reference in a new issue View git blame Copy permalink