2 em28xx.h - driver for Empia EM2800/EM2820/2840 USB video capture devices
4 Copyright (C) 2005 Markus Rechberger <mrechberger@gmail.com>
5 Ludovico Cavedon <cavedon@sssup.it>
6 Mauro Carvalho Chehab <mchehab@infradead.org>
8 Based on the em2800 driver from Sascha Sommer <saschasommer@freenet.de>
10 This program is free software; you can redistribute it and/or modify
11 it under the terms of the GNU General Public License as published by
12 the Free Software Foundation; either version 2 of the License, or
13 (at your option) any later version.
15 This program is distributed in the hope that it will be useful,
16 but WITHOUT ANY WARRANTY; without even the implied warranty of
17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 GNU General Public License for more details.
20 You should have received a copy of the GNU General Public License
21 along with this program; if not, write to the Free Software
22 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
28 #include <linux/videodev2.h>
29 #include <media/videobuf-vmalloc.h>
31 #include <linux/i2c.h>
32 #include <linux/mutex.h>
33 #include <media/ir-kbd-i2c.h>
34 #if defined(CONFIG_VIDEO_EM28XX_DVB) || defined(CONFIG_VIDEO_EM28XX_DVB_MODULE)
35 #include <media/videobuf-dvb.h>
37 #include "tuner-xc2028.h"
38 #include "em28xx-reg.h"
40 /* Boards supported by driver */
41 #define EM2800_BOARD_UNKNOWN 0
42 #define EM2820_BOARD_UNKNOWN 1
43 #define EM2820_BOARD_TERRATEC_CINERGY_250 2
44 #define EM2820_BOARD_PINNACLE_USB_2 3
45 #define EM2820_BOARD_HAUPPAUGE_WINTV_USB_2 4
46 #define EM2820_BOARD_MSI_VOX_USB_2 5
47 #define EM2800_BOARD_TERRATEC_CINERGY_200 6
48 #define EM2800_BOARD_LEADTEK_WINFAST_USBII 7
49 #define EM2800_BOARD_KWORLD_USB2800 8
50 #define EM2820_BOARD_PINNACLE_DVC_90 9
51 #define EM2880_BOARD_HAUPPAUGE_WINTV_HVR_900 10
52 #define EM2880_BOARD_TERRATEC_HYBRID_XS 11
53 #define EM2820_BOARD_KWORLD_PVRTV2800RF 12
54 #define EM2880_BOARD_TERRATEC_PRODIGY_XS 13
55 #define EM2820_BOARD_PROLINK_PLAYTV_USB2 14
56 #define EM2800_BOARD_VGEAR_POCKETTV 15
57 #define EM2883_BOARD_HAUPPAUGE_WINTV_HVR_950 16
58 #define EM2880_BOARD_PINNACLE_PCTV_HD_PRO 17
59 #define EM2880_BOARD_HAUPPAUGE_WINTV_HVR_900_R2 18
60 #define EM2860_BOARD_POINTNIX_INTRAORAL_CAMERA 19
61 #define EM2880_BOARD_AMD_ATI_TV_WONDER_HD_600 20
62 #define EM2800_BOARD_GRABBEEX_USB2800 21
63 #define EM2750_BOARD_UNKNOWN 22
64 #define EM2750_BOARD_DLCW_130 23
65 #define EM2820_BOARD_DLINK_USB_TV 24
66 #define EM2820_BOARD_GADMEI_UTV310 25
67 #define EM2820_BOARD_HERCULES_SMART_TV_USB2 26
68 #define EM2820_BOARD_PINNACLE_USB_2_FM1216ME 27
69 #define EM2820_BOARD_LEADTEK_WINFAST_USBII_DELUXE 28
70 #define EM2820_BOARD_VIDEOLOGY_20K14XUSB 30
71 #define EM2821_BOARD_USBGEAR_VD204 31
72 #define EM2821_BOARD_SUPERCOMP_USB_2 32
73 #define EM2860_BOARD_TERRATEC_HYBRID_XS 34
74 #define EM2860_BOARD_TYPHOON_DVD_MAKER 35
75 #define EM2860_BOARD_NETGMBH_CAM 36
76 #define EM2860_BOARD_GADMEI_UTV330 37
77 #define EM2861_BOARD_YAKUMO_MOVIE_MIXER 38
78 #define EM2861_BOARD_KWORLD_PVRTV_300U 39
79 #define EM2861_BOARD_PLEXTOR_PX_TV100U 40
80 #define EM2870_BOARD_KWORLD_350U 41
81 #define EM2870_BOARD_KWORLD_355U 42
82 #define EM2870_BOARD_TERRATEC_XS 43
83 #define EM2870_BOARD_TERRATEC_XS_MT2060 44
84 #define EM2870_BOARD_PINNACLE_PCTV_DVB 45
85 #define EM2870_BOARD_COMPRO_VIDEOMATE 46
86 #define EM2880_BOARD_KWORLD_DVB_305U 47
87 #define EM2880_BOARD_KWORLD_DVB_310U 48
88 #define EM2880_BOARD_MSI_DIGIVOX_AD 49
89 #define EM2880_BOARD_MSI_DIGIVOX_AD_II 50
90 #define EM2880_BOARD_TERRATEC_HYBRID_XS_FR 51
91 #define EM2881_BOARD_DNT_DA2_HYBRID 52
92 #define EM2881_BOARD_PINNACLE_HYBRID_PRO 53
93 #define EM2882_BOARD_KWORLD_VS_DVBT 54
94 #define EM2882_BOARD_TERRATEC_HYBRID_XS 55
95 #define EM2882_BOARD_PINNACLE_HYBRID_PRO 56
96 #define EM2883_BOARD_KWORLD_HYBRID_330U 57
97 #define EM2820_BOARD_COMPRO_VIDEOMATE_FORYOU 58
98 #define EM2883_BOARD_HAUPPAUGE_WINTV_HVR_850 60
99 #define EM2820_BOARD_PROLINK_PLAYTV_BOX4_USB2 61
100 #define EM2820_BOARD_GADMEI_TVR200 62
101 #define EM2860_BOARD_KAIOMY_TVNPC_U2 63
102 #define EM2860_BOARD_EASYCAP 64
103 #define EM2820_BOARD_IODATA_GVMVP_SZ 65
105 /* Limits minimum and default number of buffers */
106 #define EM28XX_MIN_BUF 4
107 #define EM28XX_DEF_BUF 8
109 /*Limits the max URB message size */
110 #define URB_MAX_CTRL_SIZE 80
112 /* Params for validated field */
113 #define EM28XX_BOARD_NOT_VALIDATED 1
114 #define EM28XX_BOARD_VALIDATED 0
116 /* Params for em28xx_cmd() audio */
117 #define EM28XX_START_AUDIO 1
118 #define EM28XX_STOP_AUDIO 0
120 /* maximum number of em28xx boards */
121 #define EM28XX_MAXBOARDS 4 /*FIXME: should be bigger */
123 /* maximum number of frames that can be queued */
124 #define EM28XX_NUM_FRAMES 5
125 /* number of frames that get used for v4l2_read() */
126 #define EM28XX_NUM_READ_FRAMES 2
128 /* number of buffers for isoc transfers */
129 #define EM28XX_NUM_BUFS 5
131 /* number of packets for each buffer
132 windows requests only 40 packets .. so we better do the same
133 this is what I found out for all alternate numbers there!
135 #define EM28XX_NUM_PACKETS 40
137 /* default alternate; 0 means choose the best */
138 #define EM28XX_PINOUT 0
140 #define EM28XX_INTERLACED_DEFAULT 1
143 #define (use usbview if you want to get the other alternate number infos)
145 #define alternate number 2
146 #define Endpoint Address: 82
150 Max Packet Size: 1448
159 Max Packet Size: 3072
163 /* time to wait when stopping the isoc transfer */
164 #define EM28XX_URB_TIMEOUT \
165 msecs_to_jiffies(EM28XX_NUM_BUFS * EM28XX_NUM_PACKETS)
167 /* time in msecs to wait for i2c writes to finish */
168 #define EM2800_I2C_WRITE_TIMEOUT 20
176 enum em28xx_stream_state {
184 struct em28xx_usb_isoc_ctl {
185 /* max packet size of isoc transaction */
188 /* number of allocated urbs */
191 /* urb for isoc transfers */
194 /* transfer buffers for isoc transfer */
195 char **transfer_buffer;
197 /* Last buffer command and region */
199 int pos, size, pktsize;
201 /* Last field: ODD or EVEN? */
204 /* Stores incomplete commands */
208 /* Stores already requested buffers */
209 struct em28xx_buffer *buf;
211 /* Stores the number of received fields */
214 /* isoc urb callback */
215 int (*isoc_copy) (struct em28xx *dev, struct urb *urb);
219 /* Struct to enumberate video formats */
222 u32 fourcc; /* v4l2 format id */
227 /* buffer for one video frame */
228 struct em28xx_buffer {
229 /* common v4l buffer stuff -- must be first */
230 struct videobuf_buffer vb;
232 struct list_head frame;
237 struct em28xx_dmaqueue {
238 struct list_head active;
239 struct list_head queued;
241 wait_queue_head_t wq;
243 /* Counters to control buffer fill */
248 enum em28xx_io_method {
256 #define MAX_EM28XX_INPUT 4
257 enum enum28xx_itype {
258 EM28XX_VMUX_COMPOSITE1 = 1,
259 EM28XX_VMUX_COMPOSITE2,
260 EM28XX_VMUX_COMPOSITE3,
261 EM28XX_VMUX_COMPOSITE4,
263 EM28XX_VMUX_TELEVISION,
270 enum em28xx_ac97_mode {
273 EM28XX_AC97_SIGMATEL,
277 struct em28xx_audio_mode {
278 enum em28xx_ac97_mode ac97;
283 unsigned int has_audio:1;
285 unsigned int i2s_3rates:1;
286 unsigned int i2s_5rates:1;
289 /* em28xx has two audio inputs: tuner and line in.
290 However, on most devices, an auxiliary AC97 codec device is used.
291 The AC97 device may have several different inputs and outputs,
292 depending on their model. So, it is possible to use AC97 mixer to
293 address more than two different entries.
296 /* This is the only entry for em28xx tuner input */
297 EM28XX_AMUX_VIDEO, /* em28xx tuner, AC97 mixer Video */
299 EM28XX_AMUX_LINE_IN, /* AC97 mixer Line In */
301 /* Some less-common mixer setups */
302 EM28XX_AMUX_VIDEO2, /* em28xx Line in, AC97 mixer Video */
312 EM28XX_AOUT_MASTER = 1 << 0,
313 EM28XX_AOUT_LINE = 1 << 1,
314 EM28XX_AOUT_MONO = 1 << 2,
315 EM28XX_AOUT_LFE = 1 << 3,
316 EM28XX_AOUT_SURR = 1 << 4,
318 /* PCM IN Mixer - used by AC97_RECORD_SELECT register */
319 EM28XX_AOUT_PCM_IN = 1 << 7,
321 /* Bits 10-8 are used to indicate the PCM IN record select */
322 EM28XX_AOUT_PCM_MIC_PCM = 0 << 8,
323 EM28XX_AOUT_PCM_CD = 1 << 8,
324 EM28XX_AOUT_PCM_VIDEO = 2 << 8,
325 EM28XX_AOUT_PCM_AUX = 3 << 8,
326 EM28XX_AOUT_PCM_LINE = 4 << 8,
327 EM28XX_AOUT_PCM_STEREO = 5 << 8,
328 EM28XX_AOUT_PCM_MONO = 6 << 8,
329 EM28XX_AOUT_PCM_PHONE = 7 << 8,
332 static inline int ac97_return_record_select(int a_out)
334 return (a_out & 0x700) >> 8;
337 struct em28xx_reg_seq {
339 unsigned char val, mask;
343 struct em28xx_input {
344 enum enum28xx_itype type;
346 enum em28xx_amux amux;
347 enum em28xx_aout aout;
348 struct em28xx_reg_seq *gpio;
351 #define INPUT(nr) (&em28xx_boards[dev->model].input[nr])
353 enum em28xx_decoder {
359 enum em28xx_adecoder {
360 EM28XX_NOADECODER = 0,
364 struct em28xx_board {
371 unsigned int tda9887_conf;
374 struct em28xx_reg_seq *dvb_gpio;
375 struct em28xx_reg_seq *suspend_gpio;
376 struct em28xx_reg_seq *tuner_gpio;
377 struct em28xx_reg_seq *mute_gpio;
379 unsigned int is_em2800:1;
380 unsigned int has_msp34xx:1;
381 unsigned int mts_firmware:1;
382 unsigned int max_range_640_480:1;
383 unsigned int has_dvb:1;
384 unsigned int has_snapshot_button:1;
385 unsigned int valid:1;
387 unsigned char xclk, i2c_speed;
389 enum em28xx_decoder decoder;
390 enum em28xx_adecoder adecoder;
392 struct em28xx_input input[MAX_EM28XX_INPUT];
393 struct em28xx_input radio;
394 IR_KEYTAB_TYPE *ir_codes;
397 struct em28xx_eeprom {
398 u32 id; /* 0x9567eb1a */
406 u16 string1, string2, string3;
412 enum em28xx_dev_state {
413 DEV_INITIALIZED = 0x01,
414 DEV_DISCONNECTED = 0x02,
415 DEV_MISCONFIGURED = 0x04,
418 #define EM28XX_AUDIO_BUFS 5
419 #define EM28XX_NUM_AUDIO_PACKETS 64
420 #define EM28XX_AUDIO_MAX_PACKET_SIZE 196 /* static value */
421 #define EM28XX_CAPTURE_STREAM_EN 1
423 /* em28xx extensions */
424 #define EM28XX_AUDIO 0x10
425 #define EM28XX_DVB 0x20
427 struct em28xx_audio {
429 char *transfer_buffer[EM28XX_AUDIO_BUFS];
430 struct urb *urb[EM28XX_AUDIO_BUFS];
431 struct usb_device *udev;
432 unsigned int capture_transfer_done;
433 struct snd_pcm_substream *capture_pcm_substream;
435 unsigned int hwptr_done_capture;
436 struct snd_card *sndcard;
439 enum em28xx_stream_state capture_stream;
447 unsigned int stream_on:1; /* Locks streams */
450 struct videobuf_queue vb_vidq;
452 enum v4l2_buf_type type;
455 /* main device struct */
457 /* generic device properties */
458 char name[30]; /* name (including minor) of the device */
459 int model; /* index in the device_data struct */
460 int devno; /* marks the number of this device */
461 enum em28xx_chip_id chip_id;
463 struct em28xx_board board;
465 unsigned int stream_on:1; /* Locks streams */
466 unsigned int has_audio_class:1;
467 unsigned int has_alsa_audio:1;
469 struct em28xx_fmt *format;
471 struct em28xx_IR *ir;
473 /* Some older em28xx chips needs a waiting time after writing */
474 unsigned int wait_after_write;
476 struct list_head devlist;
478 u32 i2s_speed; /* I2S speed for audio digital stream */
480 struct em28xx_audio_mode audio_mode;
482 int tuner_type; /* type of the tuner */
483 int tuner_addr; /* tuner address */
486 struct i2c_adapter i2c_adap;
487 struct i2c_client i2c_client;
488 /* video for linux */
489 int users; /* user count for exclusive use */
490 struct video_device *vdev; /* video for linux device struct */
491 v4l2_std_id norm; /* selected tv norm */
492 int ctl_freq; /* selected frequency */
493 unsigned int ctl_input; /* selected input */
494 unsigned int ctl_ainput;/* selected audio input */
495 unsigned int ctl_aoutput;/* selected audio output */
498 /* frame properties */
499 int width; /* current frame width */
500 int height; /* current frame height */
501 unsigned hscale; /* horizontal scale factor (see datasheet) */
502 unsigned vscale; /* vertical scale factor (see datasheet) */
503 int interlaced; /* 1=interlace fileds, 0=just top fileds */
504 unsigned int video_bytesread; /* Number of bytes read */
506 unsigned long hash; /* eeprom hash - for boards with generic ID */
507 unsigned long i2c_hash; /* i2c devicelist hash -
508 for boards with generic ID */
510 struct em28xx_audio adev;
513 enum em28xx_dev_state state;
514 enum em28xx_io_method io;
516 struct work_struct request_module_wk;
520 struct mutex ctrl_urb_lock; /* protects urb_buf */
521 /* spinlock_t queue_lock; */
522 struct list_head inqueue, outqueue;
523 wait_queue_head_t open, wait_frame, wait_stream;
524 struct video_device *vbi_dev;
525 struct video_device *radio_dev;
527 unsigned char eedata[256];
529 /* Isoc control struct */
530 struct em28xx_dmaqueue vidq;
531 struct em28xx_usb_isoc_ctl isoc_ctl;
535 struct usb_device *udev; /* the usb device */
536 int alt; /* alternate */
537 int max_pkt_size; /* max packet size of isoc transaction */
538 int num_alt; /* Number of alternative settings */
539 unsigned int *alt_max_pkt_size; /* array of wMaxPacketSize */
540 struct urb *urb[EM28XX_NUM_BUFS]; /* urb for isoc transfers */
541 char *transfer_buffer[EM28XX_NUM_BUFS]; /* transfer buffers for isoc
543 char urb_buf[URB_MAX_CTRL_SIZE]; /* urb control msg buffer */
545 /* helper funcs that call usb_control_msg */
546 int (*em28xx_write_regs) (struct em28xx *dev, u16 reg,
548 int (*em28xx_read_reg) (struct em28xx *dev, u16 reg);
549 int (*em28xx_read_reg_req_len) (struct em28xx *dev, u8 req, u16 reg,
551 int (*em28xx_write_regs_req) (struct em28xx *dev, u8 req, u16 reg,
553 int (*em28xx_read_reg_req) (struct em28xx *dev, u8 req, u16 reg);
555 enum em28xx_mode mode;
557 /* register numbers for GPO/GPIO registers */
558 u16 reg_gpo_num, reg_gpio_num;
560 /* Caches GPO and GPIO registers */
561 unsigned char reg_gpo, reg_gpio;
563 /* Snapshot button */
564 char snapshot_button_path[30]; /* path of the input dev */
565 struct input_dev *sbutton_input_dev;
566 struct delayed_work sbutton_query_work;
568 struct em28xx_dvb *dvb;
572 struct list_head next;
575 int (*init)(struct em28xx *);
576 int (*fini)(struct em28xx *);
579 /* Provided by em28xx-i2c.c */
581 void em28xx_i2c_call_clients(struct em28xx *dev, unsigned int cmd, void *arg);
582 void em28xx_do_i2c_scan(struct em28xx *dev);
583 int em28xx_i2c_register(struct em28xx *dev);
584 int em28xx_i2c_unregister(struct em28xx *dev);
586 /* Provided by em28xx-core.c */
588 u32 em28xx_request_buffers(struct em28xx *dev, u32 count);
589 void em28xx_queue_unusedframes(struct em28xx *dev);
590 void em28xx_release_buffers(struct em28xx *dev);
592 int em28xx_read_reg_req_len(struct em28xx *dev, u8 req, u16 reg,
594 int em28xx_read_reg_req(struct em28xx *dev, u8 req, u16 reg);
595 int em28xx_read_reg(struct em28xx *dev, u16 reg);
596 int em28xx_write_regs_req(struct em28xx *dev, u8 req, u16 reg, char *buf,
598 int em28xx_write_regs(struct em28xx *dev, u16 reg, char *buf, int len);
599 int em28xx_write_reg(struct em28xx *dev, u16 reg, u8 val);
601 int em28xx_read_ac97(struct em28xx *dev, u8 reg);
602 int em28xx_write_ac97(struct em28xx *dev, u8 reg, u16 val);
604 int em28xx_audio_analog_set(struct em28xx *dev);
605 int em28xx_audio_setup(struct em28xx *dev);
607 int em28xx_colorlevels_set_default(struct em28xx *dev);
608 int em28xx_capture_start(struct em28xx *dev, int start);
609 int em28xx_set_outfmt(struct em28xx *dev);
610 int em28xx_resolution_set(struct em28xx *dev);
611 int em28xx_set_alternate(struct em28xx *dev);
612 int em28xx_init_isoc(struct em28xx *dev, int max_packets,
613 int num_bufs, int max_pkt_size,
614 int (*isoc_copy) (struct em28xx *dev, struct urb *urb));
615 void em28xx_uninit_isoc(struct em28xx *dev);
616 int em28xx_set_mode(struct em28xx *dev, enum em28xx_mode set_mode);
617 int em28xx_gpio_set(struct em28xx *dev, struct em28xx_reg_seq *gpio);
618 void em28xx_wake_i2c(struct em28xx *dev);
619 void em28xx_remove_from_devlist(struct em28xx *dev);
620 void em28xx_add_into_devlist(struct em28xx *dev);
621 struct em28xx *em28xx_get_device(int minor,
622 enum v4l2_buf_type *fh_type,
624 int em28xx_register_extension(struct em28xx_ops *dev);
625 void em28xx_unregister_extension(struct em28xx_ops *dev);
626 void em28xx_init_extension(struct em28xx *dev);
627 void em28xx_close_extension(struct em28xx *dev);
629 /* Provided by em28xx-video.c */
630 int em28xx_register_analog_devices(struct em28xx *dev);
631 void em28xx_release_analog_resources(struct em28xx *dev);
633 /* Provided by em28xx-cards.c */
634 extern int em2800_variant_detect(struct usb_device *udev, int model);
635 extern void em28xx_pre_card_setup(struct em28xx *dev);
636 extern void em28xx_card_setup(struct em28xx *dev);
637 extern struct em28xx_board em28xx_boards[];
638 extern struct usb_device_id em28xx_id_table[];
639 extern const unsigned int em28xx_bcount;
640 void em28xx_set_ir(struct em28xx *dev, struct IR_i2c *ir);
641 int em28xx_tuner_callback(void *ptr, int component, int command, int arg);
642 void em28xx_release_resources(struct em28xx *dev);
644 /* Provided by em28xx-input.c */
645 int em28xx_get_key_terratec(struct IR_i2c *ir, u32 *ir_key, u32 *ir_raw);
646 int em28xx_get_key_em_haup(struct IR_i2c *ir, u32 *ir_key, u32 *ir_raw);
647 int em28xx_get_key_pinnacle_usb_grey(struct IR_i2c *ir, u32 *ir_key,
649 void em28xx_register_snapshot_button(struct em28xx *dev);
650 void em28xx_deregister_snapshot_button(struct em28xx *dev);
652 int em28xx_ir_init(struct em28xx *dev);
653 int em28xx_ir_fini(struct em28xx *dev);
657 #define em28xx_err(fmt, arg...) do {\
658 printk(KERN_ERR fmt , ##arg); } while (0)
660 #define em28xx_errdev(fmt, arg...) do {\
661 printk(KERN_ERR "%s: "fmt,\
662 dev->name , ##arg); } while (0)
664 #define em28xx_info(fmt, arg...) do {\
665 printk(KERN_INFO "%s: "fmt,\
666 dev->name , ##arg); } while (0)
667 #define em28xx_warn(fmt, arg...) do {\
668 printk(KERN_WARNING "%s: "fmt,\
669 dev->name , ##arg); } while (0)
671 static inline int em28xx_compression_disable(struct em28xx *dev)
673 /* side effect of disabling scaler and mixer */
674 return em28xx_write_reg(dev, EM28XX_R26_COMPR, 0x00);
677 static inline int em28xx_contrast_get(struct em28xx *dev)
679 return em28xx_read_reg(dev, EM28XX_R20_YGAIN) & 0x1f;
682 static inline int em28xx_brightness_get(struct em28xx *dev)
684 return em28xx_read_reg(dev, EM28XX_R21_YOFFSET);
687 static inline int em28xx_saturation_get(struct em28xx *dev)
689 return em28xx_read_reg(dev, EM28XX_R22_UVGAIN) & 0x1f;
692 static inline int em28xx_u_balance_get(struct em28xx *dev)
694 return em28xx_read_reg(dev, EM28XX_R23_UOFFSET);
697 static inline int em28xx_v_balance_get(struct em28xx *dev)
699 return em28xx_read_reg(dev, EM28XX_R24_VOFFSET);
702 static inline int em28xx_gamma_get(struct em28xx *dev)
704 return em28xx_read_reg(dev, EM28XX_R14_GAMMA) & 0x3f;
707 static inline int em28xx_contrast_set(struct em28xx *dev, s32 val)
710 return em28xx_write_regs(dev, EM28XX_R20_YGAIN, &tmp, 1);
713 static inline int em28xx_brightness_set(struct em28xx *dev, s32 val)
716 return em28xx_write_regs(dev, EM28XX_R21_YOFFSET, &tmp, 1);
719 static inline int em28xx_saturation_set(struct em28xx *dev, s32 val)
722 return em28xx_write_regs(dev, EM28XX_R22_UVGAIN, &tmp, 1);
725 static inline int em28xx_u_balance_set(struct em28xx *dev, s32 val)
728 return em28xx_write_regs(dev, EM28XX_R23_UOFFSET, &tmp, 1);
731 static inline int em28xx_v_balance_set(struct em28xx *dev, s32 val)
734 return em28xx_write_regs(dev, EM28XX_R24_VOFFSET, &tmp, 1);
737 static inline int em28xx_gamma_set(struct em28xx *dev, s32 val)
740 return em28xx_write_regs(dev, EM28XX_R14_GAMMA, &tmp, 1);
743 /*FIXME: maxw should be dependent of alt mode */
744 static inline unsigned int norm_maxw(struct em28xx *dev)
746 if (dev->board.max_range_640_480)
752 static inline unsigned int norm_maxh(struct em28xx *dev)
754 if (dev->board.max_range_640_480)
757 return (dev->norm & V4L2_STD_625_50) ? 576 : 480;