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 EM2821_BOARD_PROLINK_PLAYTV_USB2 33
74 #define EM2860_BOARD_TERRATEC_HYBRID_XS 34
75 #define EM2860_BOARD_TYPHOON_DVD_MAKER 35
76 #define EM2860_BOARD_NETGMBH_CAM 36
77 #define EM2860_BOARD_GADMEI_UTV330 37
78 #define EM2861_BOARD_YAKUMO_MOVIE_MIXER 38
79 #define EM2861_BOARD_KWORLD_PVRTV_300U 39
80 #define EM2861_BOARD_PLEXTOR_PX_TV100U 40
81 #define EM2870_BOARD_KWORLD_350U 41
82 #define EM2870_BOARD_KWORLD_355U 42
83 #define EM2870_BOARD_TERRATEC_XS 43
84 #define EM2870_BOARD_TERRATEC_XS_MT2060 44
85 #define EM2870_BOARD_PINNACLE_PCTV_DVB 45
86 #define EM2870_BOARD_COMPRO_VIDEOMATE 46
87 #define EM2880_BOARD_KWORLD_DVB_305U 47
88 #define EM2880_BOARD_KWORLD_DVB_310U 48
89 #define EM2880_BOARD_MSI_DIGIVOX_AD 49
90 #define EM2880_BOARD_MSI_DIGIVOX_AD_II 50
91 #define EM2880_BOARD_TERRATEC_HYBRID_XS_FR 51
92 #define EM2881_BOARD_DNT_DA2_HYBRID 52
93 #define EM2881_BOARD_PINNACLE_HYBRID_PRO 53
94 #define EM2882_BOARD_KWORLD_VS_DVBT 54
95 #define EM2882_BOARD_TERRATEC_HYBRID_XS 55
96 #define EM2882_BOARD_PINNACLE_HYBRID_PRO 56
97 #define EM2883_BOARD_KWORLD_HYBRID_330U 57
98 #define EM2820_BOARD_COMPRO_VIDEOMATE_FORYOU 58
99 #define EM2883_BOARD_HAUPPAUGE_WINTV_HVR_850 60
100 #define EM2820_BOARD_PROLINK_PLAYTV_BOX4_USB2 61
101 #define EM2820_BOARD_GADMEI_TVR200 62
102 #define EM2860_BOARD_KAIOMY_TVNPC_U2 63
103 #define EM2860_BOARD_EASYCAP 64
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 /* maximum number of em28xx boards */
117 #define EM28XX_MAXBOARDS 4 /*FIXME: should be bigger */
119 /* maximum number of frames that can be queued */
120 #define EM28XX_NUM_FRAMES 5
121 /* number of frames that get used for v4l2_read() */
122 #define EM28XX_NUM_READ_FRAMES 2
124 /* number of buffers for isoc transfers */
125 #define EM28XX_NUM_BUFS 5
127 /* number of packets for each buffer
128 windows requests only 40 packets .. so we better do the same
129 this is what I found out for all alternate numbers there!
131 #define EM28XX_NUM_PACKETS 40
133 /* default alternate; 0 means choose the best */
134 #define EM28XX_PINOUT 0
136 #define EM28XX_INTERLACED_DEFAULT 1
139 #define (use usbview if you want to get the other alternate number infos)
141 #define alternate number 2
142 #define Endpoint Address: 82
146 Max Packet Size: 1448
155 Max Packet Size: 3072
159 /* time to wait when stopping the isoc transfer */
160 #define EM28XX_URB_TIMEOUT msecs_to_jiffies(EM28XX_NUM_BUFS * EM28XX_NUM_PACKETS)
162 /* time in msecs to wait for i2c writes to finish */
163 #define EM2800_I2C_WRITE_TIMEOUT 20
171 enum em28xx_stream_state {
179 struct em28xx_usb_isoc_ctl {
180 /* max packet size of isoc transaction */
183 /* number of allocated urbs */
186 /* urb for isoc transfers */
189 /* transfer buffers for isoc transfer */
190 char **transfer_buffer;
192 /* Last buffer command and region */
194 int pos, size, pktsize;
196 /* Last field: ODD or EVEN? */
199 /* Stores incomplete commands */
203 /* Stores already requested buffers */
204 struct em28xx_buffer *buf;
206 /* Stores the number of received fields */
209 /* isoc urb callback */
210 int (*isoc_copy) (struct em28xx *dev, struct urb *urb);
214 /* Struct to enumberate video formats */
217 u32 fourcc; /* v4l2 format id */
222 /* buffer for one video frame */
223 struct em28xx_buffer {
224 /* common v4l buffer stuff -- must be first */
225 struct videobuf_buffer vb;
227 struct list_head frame;
232 struct em28xx_dmaqueue {
233 struct list_head active;
234 struct list_head queued;
236 wait_queue_head_t wq;
238 /* Counters to control buffer fill */
243 enum em28xx_io_method {
251 #define MAX_EM28XX_INPUT 4
252 enum enum28xx_itype {
253 EM28XX_VMUX_COMPOSITE1 = 1,
254 EM28XX_VMUX_COMPOSITE2,
255 EM28XX_VMUX_COMPOSITE3,
256 EM28XX_VMUX_COMPOSITE4,
258 EM28XX_VMUX_TELEVISION,
265 enum em28xx_ac97_mode {
268 EM28XX_AC97_SIGMATEL,
272 struct em28xx_audio_mode {
273 enum em28xx_ac97_mode ac97;
278 unsigned int has_audio:1;
280 unsigned int i2s_3rates:1;
281 unsigned int i2s_5rates:1;
284 /* em28xx has two audio inputs: tuner and line in.
285 However, on most devices, an auxiliary AC97 codec device is used.
286 The AC97 device may have several different inputs and outputs,
287 depending on their model. So, it is possible to use AC97 mixer to
288 address more than two different entries.
291 /* This is the only entry for em28xx tuner input */
292 EM28XX_AMUX_VIDEO, /* em28xx tuner, AC97 mixer Video */
294 EM28XX_AMUX_LINE_IN, /* AC97 mixer Line In */
296 /* Some less-common mixer setups */
297 EM28XX_AMUX_VIDEO2, /* em28xx Line in, AC97 mixer Video */
307 EM28XX_AOUT_MASTER = 1 << 0,
308 EM28XX_AOUT_LINE = 1 << 1,
309 EM28XX_AOUT_MONO = 1 << 2,
310 EM28XX_AOUT_LFE = 1 << 3,
311 EM28XX_AOUT_SURR = 1 << 4,
313 /* PCM IN Mixer - used by AC97_RECORD_SELECT register */
314 EM28XX_AOUT_PCM_IN = 1 << 7,
316 /* Bits 10-8 are used to indicate the PCM IN record select */
317 EM28XX_AOUT_PCM_MIC_PCM = 0 << 8,
318 EM28XX_AOUT_PCM_CD = 1 << 8,
319 EM28XX_AOUT_PCM_VIDEO = 2 << 8,
320 EM28XX_AOUT_PCM_AUX = 3 << 8,
321 EM28XX_AOUT_PCM_LINE = 4 << 8,
322 EM28XX_AOUT_PCM_STEREO = 5 << 8,
323 EM28XX_AOUT_PCM_MONO = 6 << 8,
324 EM28XX_AOUT_PCM_PHONE = 7 << 8,
327 static inline int ac97_return_record_select(int a_out)
329 return (a_out & 0x700) >> 8;
332 struct em28xx_reg_seq {
334 unsigned char val, mask;
338 struct em28xx_input {
339 enum enum28xx_itype type;
341 enum em28xx_amux amux;
342 enum em28xx_aout aout;
343 struct em28xx_reg_seq *gpio;
346 #define INPUT(nr) (&em28xx_boards[dev->model].input[nr])
348 enum em28xx_decoder {
354 struct em28xx_board {
361 unsigned int tda9887_conf;
364 struct em28xx_reg_seq *dvb_gpio;
365 struct em28xx_reg_seq *suspend_gpio;
366 struct em28xx_reg_seq *tuner_gpio;
368 unsigned int is_em2800:1;
369 unsigned int has_msp34xx:1;
370 unsigned int mts_firmware:1;
371 unsigned int max_range_640_480:1;
372 unsigned int has_dvb:1;
373 unsigned int has_snapshot_button:1;
374 unsigned int valid:1;
376 unsigned char xclk, i2c_speed;
378 enum em28xx_decoder decoder;
380 struct em28xx_input input[MAX_EM28XX_INPUT];
381 struct em28xx_input radio;
382 IR_KEYTAB_TYPE *ir_codes;
385 struct em28xx_eeprom {
386 u32 id; /* 0x9567eb1a */
394 u16 string1, string2, string3;
400 enum em28xx_dev_state {
401 DEV_INITIALIZED = 0x01,
402 DEV_DISCONNECTED = 0x02,
403 DEV_MISCONFIGURED = 0x04,
406 #define EM28XX_AUDIO_BUFS 5
407 #define EM28XX_NUM_AUDIO_PACKETS 64
408 #define EM28XX_AUDIO_MAX_PACKET_SIZE 196 /* static value */
409 #define EM28XX_CAPTURE_STREAM_EN 1
411 /* em28xx extensions */
412 #define EM28XX_AUDIO 0x10
413 #define EM28XX_DVB 0x20
415 struct em28xx_audio {
417 char *transfer_buffer[EM28XX_AUDIO_BUFS];
418 struct urb *urb[EM28XX_AUDIO_BUFS];
419 struct usb_device *udev;
420 unsigned int capture_transfer_done;
421 struct snd_pcm_substream *capture_pcm_substream;
423 unsigned int hwptr_done_capture;
424 struct snd_card *sndcard;
427 enum em28xx_stream_state capture_stream;
435 unsigned int stream_on:1; /* Locks streams */
438 struct videobuf_queue vb_vidq;
440 enum v4l2_buf_type type;
443 /* main device struct */
445 /* generic device properties */
446 char name[30]; /* name (including minor) of the device */
447 int model; /* index in the device_data struct */
448 int devno; /* marks the number of this device */
449 enum em28xx_chip_id chip_id;
451 struct em28xx_board board;
453 unsigned int stream_on:1; /* Locks streams */
454 unsigned int has_audio_class:1;
455 unsigned int has_alsa_audio:1;
457 struct em28xx_fmt *format;
459 struct em28xx_IR *ir;
461 /* Some older em28xx chips needs a waiting time after writing */
462 unsigned int wait_after_write;
464 struct list_head devlist;
466 u32 i2s_speed; /* I2S speed for audio digital stream */
468 struct em28xx_audio_mode audio_mode;
470 int tuner_type; /* type of the tuner */
471 int tuner_addr; /* tuner address */
474 struct i2c_adapter i2c_adap;
475 struct i2c_client i2c_client;
476 /* video for linux */
477 int users; /* user count for exclusive use */
478 struct video_device *vdev; /* video for linux device struct */
479 v4l2_std_id norm; /* selected tv norm */
480 int ctl_freq; /* selected frequency */
481 unsigned int ctl_input; /* selected input */
482 unsigned int ctl_ainput;/* selected audio input */
483 unsigned int ctl_aoutput;/* selected audio output */
486 /* frame properties */
487 int width; /* current frame width */
488 int height; /* current frame height */
489 unsigned hscale; /* horizontal scale factor (see datasheet) */
490 unsigned vscale; /* vertical scale factor (see datasheet) */
491 int interlaced; /* 1=interlace fileds, 0=just top fileds */
492 unsigned int video_bytesread; /* Number of bytes read */
494 unsigned long hash; /* eeprom hash - for boards with generic ID */
495 unsigned long i2c_hash; /* i2c devicelist hash -
496 for boards with generic ID */
498 struct em28xx_audio adev;
501 enum em28xx_dev_state state;
502 enum em28xx_io_method io;
504 struct work_struct request_module_wk;
508 struct mutex ctrl_urb_lock; /* protects urb_buf */
509 /* spinlock_t queue_lock; */
510 struct list_head inqueue, outqueue;
511 wait_queue_head_t open, wait_frame, wait_stream;
512 struct video_device *vbi_dev;
513 struct video_device *radio_dev;
515 unsigned char eedata[256];
517 /* Isoc control struct */
518 struct em28xx_dmaqueue vidq;
519 struct em28xx_usb_isoc_ctl isoc_ctl;
523 struct usb_device *udev; /* the usb device */
524 int alt; /* alternate */
525 int max_pkt_size; /* max packet size of isoc transaction */
526 int num_alt; /* Number of alternative settings */
527 unsigned int *alt_max_pkt_size; /* array of wMaxPacketSize */
528 struct urb *urb[EM28XX_NUM_BUFS]; /* urb for isoc transfers */
529 char *transfer_buffer[EM28XX_NUM_BUFS]; /* transfer buffers for isoc transfer */
530 char urb_buf[URB_MAX_CTRL_SIZE]; /* urb control msg buffer */
532 /* helper funcs that call usb_control_msg */
533 int (*em28xx_write_regs) (struct em28xx *dev, u16 reg,
535 int (*em28xx_read_reg) (struct em28xx *dev, u16 reg);
536 int (*em28xx_read_reg_req_len) (struct em28xx *dev, u8 req, u16 reg,
538 int (*em28xx_write_regs_req) (struct em28xx *dev, u8 req, u16 reg,
540 int (*em28xx_read_reg_req) (struct em28xx *dev, u8 req, u16 reg);
542 enum em28xx_mode mode;
544 /* register numbers for GPO/GPIO registers */
545 u16 reg_gpo_num, reg_gpio_num;
547 /* Caches GPO and GPIO registers */
548 unsigned char reg_gpo, reg_gpio;
550 /* Snapshot button */
551 char snapshot_button_path[30]; /* path of the input dev */
552 struct input_dev *sbutton_input_dev;
553 struct delayed_work sbutton_query_work;
555 struct em28xx_dvb *dvb;
559 struct list_head next;
562 int (*init)(struct em28xx *);
563 int (*fini)(struct em28xx *);
566 /* Provided by em28xx-i2c.c */
568 void em28xx_i2c_call_clients(struct em28xx *dev, unsigned int cmd, void *arg);
569 void em28xx_do_i2c_scan(struct em28xx *dev);
570 int em28xx_i2c_register(struct em28xx *dev);
571 int em28xx_i2c_unregister(struct em28xx *dev);
573 /* Provided by em28xx-core.c */
575 u32 em28xx_request_buffers(struct em28xx *dev, u32 count);
576 void em28xx_queue_unusedframes(struct em28xx *dev);
577 void em28xx_release_buffers(struct em28xx *dev);
579 int em28xx_read_reg_req_len(struct em28xx *dev, u8 req, u16 reg,
581 int em28xx_read_reg_req(struct em28xx *dev, u8 req, u16 reg);
582 int em28xx_read_reg(struct em28xx *dev, u16 reg);
583 int em28xx_write_regs_req(struct em28xx *dev, u8 req, u16 reg, char *buf,
585 int em28xx_write_regs(struct em28xx *dev, u16 reg, char *buf, int len);
586 int em28xx_write_reg(struct em28xx *dev, u16 reg, u8 val);
588 int em28xx_read_ac97(struct em28xx *dev, u8 reg);
589 int em28xx_write_ac97(struct em28xx *dev, u8 reg, u16 val);
591 int em28xx_audio_analog_set(struct em28xx *dev);
592 int em28xx_audio_setup(struct em28xx *dev);
594 int em28xx_colorlevels_set_default(struct em28xx *dev);
595 int em28xx_capture_start(struct em28xx *dev, int start);
596 int em28xx_set_outfmt(struct em28xx *dev);
597 int em28xx_resolution_set(struct em28xx *dev);
598 int em28xx_set_alternate(struct em28xx *dev);
599 int em28xx_init_isoc(struct em28xx *dev, int max_packets,
600 int num_bufs, int max_pkt_size,
601 int (*isoc_copy) (struct em28xx *dev, struct urb *urb));
602 void em28xx_uninit_isoc(struct em28xx *dev);
603 int em28xx_set_mode(struct em28xx *dev, enum em28xx_mode set_mode);
604 int em28xx_gpio_set(struct em28xx *dev, struct em28xx_reg_seq *gpio);
605 void em28xx_wake_i2c(struct em28xx *dev);
606 void em28xx_remove_from_devlist(struct em28xx *dev);
607 void em28xx_add_into_devlist(struct em28xx *dev);
608 struct em28xx *em28xx_get_device(int minor,
609 enum v4l2_buf_type *fh_type,
611 int em28xx_register_extension(struct em28xx_ops *dev);
612 void em28xx_unregister_extension(struct em28xx_ops *dev);
613 void em28xx_init_extension(struct em28xx *dev);
614 void em28xx_close_extension(struct em28xx *dev);
616 /* Provided by em28xx-video.c */
617 int em28xx_register_analog_devices(struct em28xx *dev);
618 void em28xx_release_analog_resources(struct em28xx *dev);
620 /* Provided by em28xx-cards.c */
621 extern int em2800_variant_detect(struct usb_device *udev, int model);
622 extern void em28xx_pre_card_setup(struct em28xx *dev);
623 extern void em28xx_card_setup(struct em28xx *dev);
624 extern struct em28xx_board em28xx_boards[];
625 extern struct usb_device_id em28xx_id_table[];
626 extern const unsigned int em28xx_bcount;
627 void em28xx_set_ir(struct em28xx *dev, struct IR_i2c *ir);
628 int em28xx_tuner_callback(void *ptr, int component, int command, int arg);
629 void em28xx_release_resources(struct em28xx *dev);
631 /* Provided by em28xx-input.c */
632 int em28xx_get_key_terratec(struct IR_i2c *ir, u32 *ir_key, u32 *ir_raw);
633 int em28xx_get_key_em_haup(struct IR_i2c *ir, u32 *ir_key, u32 *ir_raw);
634 int em28xx_get_key_pinnacle_usb_grey(struct IR_i2c *ir, u32 *ir_key,
636 void em28xx_register_snapshot_button(struct em28xx *dev);
637 void em28xx_deregister_snapshot_button(struct em28xx *dev);
639 int em28xx_ir_init(struct em28xx *dev);
640 int em28xx_ir_fini(struct em28xx *dev);
644 #define em28xx_err(fmt, arg...) do {\
645 printk(KERN_ERR fmt , ##arg); } while (0)
647 #define em28xx_errdev(fmt, arg...) do {\
648 printk(KERN_ERR "%s: "fmt,\
649 dev->name , ##arg); } while (0)
651 #define em28xx_info(fmt, arg...) do {\
652 printk(KERN_INFO "%s: "fmt,\
653 dev->name , ##arg); } while (0)
654 #define em28xx_warn(fmt, arg...) do {\
655 printk(KERN_WARNING "%s: "fmt,\
656 dev->name , ##arg); } while (0)
658 static inline int em28xx_compression_disable(struct em28xx *dev)
660 /* side effect of disabling scaler and mixer */
661 return em28xx_write_reg(dev, EM28XX_R26_COMPR, 0x00);
664 static inline int em28xx_contrast_get(struct em28xx *dev)
666 return em28xx_read_reg(dev, EM28XX_R20_YGAIN) & 0x1f;
669 static inline int em28xx_brightness_get(struct em28xx *dev)
671 return em28xx_read_reg(dev, EM28XX_R21_YOFFSET);
674 static inline int em28xx_saturation_get(struct em28xx *dev)
676 return em28xx_read_reg(dev, EM28XX_R22_UVGAIN) & 0x1f;
679 static inline int em28xx_u_balance_get(struct em28xx *dev)
681 return em28xx_read_reg(dev, EM28XX_R23_UOFFSET);
684 static inline int em28xx_v_balance_get(struct em28xx *dev)
686 return em28xx_read_reg(dev, EM28XX_R24_VOFFSET);
689 static inline int em28xx_gamma_get(struct em28xx *dev)
691 return em28xx_read_reg(dev, EM28XX_R14_GAMMA) & 0x3f;
694 static inline int em28xx_contrast_set(struct em28xx *dev, s32 val)
697 return em28xx_write_regs(dev, EM28XX_R20_YGAIN, &tmp, 1);
700 static inline int em28xx_brightness_set(struct em28xx *dev, s32 val)
703 return em28xx_write_regs(dev, EM28XX_R21_YOFFSET, &tmp, 1);
706 static inline int em28xx_saturation_set(struct em28xx *dev, s32 val)
709 return em28xx_write_regs(dev, EM28XX_R22_UVGAIN, &tmp, 1);
712 static inline int em28xx_u_balance_set(struct em28xx *dev, s32 val)
715 return em28xx_write_regs(dev, EM28XX_R23_UOFFSET, &tmp, 1);
718 static inline int em28xx_v_balance_set(struct em28xx *dev, s32 val)
721 return em28xx_write_regs(dev, EM28XX_R24_VOFFSET, &tmp, 1);
724 static inline int em28xx_gamma_set(struct em28xx *dev, s32 val)
727 return em28xx_write_regs(dev, EM28XX_R14_GAMMA, &tmp, 1);
730 /*FIXME: maxw should be dependent of alt mode */
731 static inline unsigned int norm_maxw(struct em28xx *dev)
733 if (dev->board.max_range_640_480)
739 static inline unsigned int norm_maxh(struct em28xx *dev)
741 if (dev->board.max_range_640_480)
744 return (dev->norm & V4L2_STD_625_50) ? 576 : 480;