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 <linux/i2c.h>
30 #include <linux/mutex.h>
31 #include <media/ir-kbd-i2c.h>
35 /* maximum number of em28xx boards */
36 #define EM28XX_MAXBOARDS 1 /*FIXME: should be bigger */
38 /* maximum number of frames that can be queued */
39 #define EM28XX_NUM_FRAMES 5
40 /* number of frames that get used for v4l2_read() */
41 #define EM28XX_NUM_READ_FRAMES 2
43 /* number of buffers for isoc transfers */
44 #define EM28XX_NUM_BUFS 5
46 /* number of packets for each buffer
47 windows requests only 40 packets .. so we better do the same
48 this is what I found out for all alternate numbers there!
50 #define EM28XX_NUM_PACKETS 40
52 /* default alternate; 0 means choose the best */
53 #define EM28XX_PINOUT 0
55 #define EM28XX_INTERLACED_DEFAULT 1
58 #define (use usbview if you want to get the other alternate number infos)
60 #define alternate number 2
61 #define Endpoint Address: 82
78 /* time to wait when stopping the isoc transfer */
79 #define EM28XX_URB_TIMEOUT msecs_to_jiffies(EM28XX_NUM_BUFS * EM28XX_NUM_PACKETS)
81 /* time in msecs to wait for i2c writes to finish */
82 #define EM2800_I2C_WRITE_TIMEOUT 20
84 /* the various frame states */
85 enum em28xx_frame_state {
94 enum em28xx_stream_state {
101 struct em28xx_frame_t {
103 struct v4l2_buffer buf;
104 enum em28xx_frame_state state;
105 struct list_head frame;
106 unsigned long vma_use_count;
112 enum em28xx_io_method {
120 #define MAX_EM28XX_INPUT 4
121 enum enum28xx_itype {
122 EM28XX_VMUX_COMPOSITE1 = 1,
123 EM28XX_VMUX_COMPOSITE2,
124 EM28XX_VMUX_COMPOSITE3,
125 EM28XX_VMUX_COMPOSITE4,
127 EM28XX_VMUX_TELEVISION,
137 EM28XX_AMUX_AC97_VIDEO,
138 EM28XX_AMUX_AC97_LINE_IN,
141 struct em28xx_input {
142 enum enum28xx_itype type;
144 enum em28xx_amux amux;
147 #define INPUT(nr) (&em28xx_boards[dev->model].input[nr])
149 enum em28xx_decoder {
155 struct em28xx_board {
161 unsigned int tda9887_conf;
163 unsigned int is_em2800:1;
164 unsigned int has_tuner:1;
165 unsigned int has_msp34xx:1;
166 unsigned int mts_firmware:1;
167 unsigned int has_12mhz_i2s:1;
168 unsigned int max_range_640_480:1;
170 unsigned int analog_gpio;
172 enum em28xx_decoder decoder;
174 struct em28xx_input input[MAX_EM28XX_INPUT];
175 struct em28xx_input radio;
178 struct em28xx_eeprom {
179 u32 id; /* 0x9567eb1a */
187 u16 string1, string2, string3;
193 enum em28xx_dev_state {
194 DEV_INITIALIZED = 0x01,
195 DEV_DISCONNECTED = 0x02,
196 DEV_MISCONFIGURED = 0x04,
199 #define EM28XX_AUDIO_BUFS 5
200 #define EM28XX_NUM_AUDIO_PACKETS 64
201 #define EM28XX_AUDIO_MAX_PACKET_SIZE 196 /* static value */
202 #define EM28XX_CAPTURE_STREAM_EN 1
203 #define EM28XX_AUDIO 0x10
205 struct em28xx_audio {
207 char *transfer_buffer[EM28XX_AUDIO_BUFS];
208 struct urb *urb[EM28XX_AUDIO_BUFS];
209 struct usb_device *udev;
210 unsigned int capture_transfer_done;
211 struct snd_pcm_substream *capture_pcm_substream;
213 unsigned int hwptr_done_capture;
214 struct snd_card *sndcard;
217 enum em28xx_stream_state capture_stream;
221 /* main device struct */
223 /* generic device properties */
224 char name[30]; /* name (including minor) of the device */
225 int model; /* index in the device_data struct */
226 int devno; /* marks the number of this device */
227 unsigned int analog_gpio;
228 unsigned int is_em2800:1;
229 unsigned int has_tuner:1;
230 unsigned int has_msp34xx:1;
231 unsigned int has_tda9887:1;
232 unsigned int stream_on:1; /* Locks streams */
233 unsigned int has_audio_class:1;
234 unsigned int has_12mhz_i2s:1;
235 unsigned int max_range_640_480:1;
237 int video_inputs; /* number of video inputs */
238 struct list_head devlist;
240 u32 i2s_speed; /* I2S speed for audio digital stream */
242 enum em28xx_decoder decoder;
244 int tuner_type; /* type of the tuner */
245 int tuner_addr; /* tuner address */
248 struct i2c_adapter i2c_adap;
249 struct i2c_client i2c_client;
250 /* video for linux */
251 int users; /* user count for exclusive use */
252 struct video_device *vdev; /* video for linux device struct */
253 v4l2_std_id norm; /* selected tv norm */
254 int ctl_freq; /* selected frequency */
255 unsigned int ctl_input; /* selected input */
256 unsigned int ctl_ainput; /* slected audio input */
259 /* frame properties */
260 struct em28xx_frame_t frame[EM28XX_NUM_FRAMES]; /* list of frames */
261 int num_frames; /* number of frames currently in use */
262 unsigned int frame_count; /* total number of transfered frames */
263 struct em28xx_frame_t *frame_current; /* the frame that is being filled */
264 int width; /* current frame width */
265 int height; /* current frame height */
266 int frame_size; /* current frame size */
267 int field_size; /* current field size */
269 int hscale; /* horizontal scale factor (see datasheet) */
270 int vscale; /* vertical scale factor (see datasheet) */
271 int interlaced; /* 1=interlace fileds, 0=just top fileds */
273 unsigned int video_bytesread; /* Number of bytes read */
275 unsigned long hash; /* eeprom hash - for boards with generic ID */
276 unsigned long i2c_hash; /* i2c devicelist hash - for boards with generic ID */
278 struct em28xx_audio *adev;
281 enum em28xx_dev_state state;
282 enum em28xx_stream_state stream;
283 enum em28xx_io_method io;
285 struct work_struct request_module_wk;
289 spinlock_t queue_lock;
290 struct list_head inqueue, outqueue;
291 wait_queue_head_t open, wait_frame, wait_stream;
292 struct video_device *vbi_dev;
293 struct video_device *radio_dev;
295 unsigned char eedata[256];
298 struct usb_device *udev; /* the usb device */
299 int alt; /* alternate */
300 int max_pkt_size; /* max packet size of isoc transaction */
301 int num_alt; /* Number of alternative settings */
302 unsigned int *alt_max_pkt_size; /* array of wMaxPacketSize */
303 struct urb *urb[EM28XX_NUM_BUFS]; /* urb for isoc transfers */
304 char *transfer_buffer[EM28XX_NUM_BUFS]; /* transfer buffers for isoc transfer */
305 /* helper funcs that call usb_control_msg */
306 int (*em28xx_write_regs) (struct em28xx * dev, u16 reg, char *buf,
308 int (*em28xx_read_reg) (struct em28xx * dev, u16 reg);
309 int (*em28xx_read_reg_req_len) (struct em28xx * dev, u8 req, u16 reg,
311 int (*em28xx_write_regs_req) (struct em28xx * dev, u8 req, u16 reg,
313 int (*em28xx_read_reg_req) (struct em28xx * dev, u8 req, u16 reg);
318 unsigned int stream_on:1; /* Locks streams */
323 struct list_head next;
326 int (*init)(struct em28xx *);
327 int (*fini)(struct em28xx *);
330 /* Provided by em28xx-i2c.c */
332 void em28xx_i2c_call_clients(struct em28xx *dev, unsigned int cmd, void *arg);
333 void em28xx_do_i2c_scan(struct em28xx *dev);
334 int em28xx_i2c_register(struct em28xx *dev);
335 int em28xx_i2c_unregister(struct em28xx *dev);
337 /* Provided by em28xx-core.c */
339 u32 em28xx_request_buffers(struct em28xx *dev, u32 count);
340 void em28xx_queue_unusedframes(struct em28xx *dev);
341 void em28xx_release_buffers(struct em28xx *dev);
343 int em28xx_read_reg_req_len(struct em28xx *dev, u8 req, u16 reg,
345 int em28xx_read_reg_req(struct em28xx *dev, u8 req, u16 reg);
346 int em28xx_read_reg(struct em28xx *dev, u16 reg);
347 int em28xx_write_regs_req(struct em28xx *dev, u8 req, u16 reg, char *buf,
349 int em28xx_write_regs(struct em28xx *dev, u16 reg, char *buf, int len);
350 int em28xx_write_reg_bits(struct em28xx *dev, u16 reg, u8 val,
352 int em28xx_set_audio_source(struct em28xx *dev);
353 int em28xx_audio_analog_set(struct em28xx *dev);
355 int em28xx_colorlevels_set_default(struct em28xx *dev);
356 int em28xx_capture_start(struct em28xx *dev, int start);
357 int em28xx_outfmt_set_yuv422(struct em28xx *dev);
358 int em28xx_resolution_set(struct em28xx *dev);
359 int em28xx_init_isoc(struct em28xx *dev);
360 void em28xx_uninit_isoc(struct em28xx *dev);
361 int em28xx_set_alternate(struct em28xx *dev);
363 /* Provided by em28xx-video.c */
364 int em28xx_register_extension(struct em28xx_ops *dev);
365 void em28xx_unregister_extension(struct em28xx_ops *dev);
367 /* Provided by em28xx-cards.c */
368 extern int em2800_variant_detect(struct usb_device* udev,int model);
369 extern void em28xx_pre_card_setup(struct em28xx *dev);
370 extern void em28xx_card_setup(struct em28xx *dev);
371 extern struct em28xx_board em28xx_boards[];
372 extern struct usb_device_id em28xx_id_table[];
373 extern const unsigned int em28xx_bcount;
374 void em28xx_set_ir(struct em28xx *dev, struct IR_i2c *ir);
376 /* Provided by em28xx-input.c */
377 /* TODO: Check if the standard get_key handlers on ir-common can be used */
378 int em28xx_get_key_terratec(struct IR_i2c *ir, u32 *ir_key, u32 *ir_raw);
379 int em28xx_get_key_em_haup(struct IR_i2c *ir, u32 *ir_key, u32 *ir_raw);
380 int em28xx_get_key_pinnacle_usb_grey(struct IR_i2c *ir, u32 *ir_key,
383 /* em2800 registers */
384 #define EM2800_AUDIOSRC_REG 0x08
386 /* em28xx registers */
387 #define I2C_CLK_REG 0x06
388 #define CHIPID_REG 0x0a
389 #define USBSUSP_REG 0x0c /* */
391 #define AUDIOSRC_REG 0x0e
392 #define XCLK_REG 0x0f
394 #define VINMODE_REG 0x10
395 #define VINCTRL_REG 0x11
396 #define VINENABLE_REG 0x12 /* */
398 #define GAMMA_REG 0x14
399 #define RGAIN_REG 0x15
400 #define GGAIN_REG 0x16
401 #define BGAIN_REG 0x17
402 #define ROFFSET_REG 0x18
403 #define GOFFSET_REG 0x19
404 #define BOFFSET_REG 0x1a
406 #define OFLOW_REG 0x1b
407 #define HSTART_REG 0x1c
408 #define VSTART_REG 0x1d
409 #define CWIDTH_REG 0x1e
410 #define CHEIGHT_REG 0x1f
412 #define YGAIN_REG 0x20
413 #define YOFFSET_REG 0x21
414 #define UVGAIN_REG 0x22
415 #define UOFFSET_REG 0x23
416 #define VOFFSET_REG 0x24
417 #define SHARPNESS_REG 0x25
419 #define COMPR_REG 0x26
420 #define OUTFMT_REG 0x27
422 #define XMIN_REG 0x28
423 #define XMAX_REG 0x29
424 #define YMIN_REG 0x2a
425 #define YMAX_REG 0x2b
427 #define HSCALELOW_REG 0x30
428 #define HSCALEHIGH_REG 0x31
429 #define VSCALELOW_REG 0x32
430 #define VSCALEHIGH_REG 0x33
432 #define AC97LSB_REG 0x40
433 #define AC97MSB_REG 0x41
434 #define AC97ADDR_REG 0x42
435 #define AC97BUSY_REG 0x43
437 /* em202 registers */
438 #define MASTER_AC97 0x02
439 #define LINE_IN_AC97 0x10
440 #define VIDEO_AC97 0x14
442 /* register settings */
443 #define EM2800_AUDIO_SRC_TUNER 0x0d
444 #define EM2800_AUDIO_SRC_LINE 0x0c
445 #define EM28XX_AUDIO_SRC_TUNER 0xc0
446 #define EM28XX_AUDIO_SRC_LINE 0x80
450 #define em28xx_err(fmt, arg...) do {\
451 printk(KERN_ERR fmt , ##arg); } while (0)
453 #define em28xx_errdev(fmt, arg...) do {\
454 printk(KERN_ERR "%s: "fmt,\
455 dev->name , ##arg); } while (0)
457 #define em28xx_info(fmt, arg...) do {\
458 printk(KERN_INFO "%s: "fmt,\
459 dev->name , ##arg); } while (0)
460 #define em28xx_warn(fmt, arg...) do {\
461 printk(KERN_WARNING "%s: "fmt,\
462 dev->name , ##arg); } while (0)
464 inline static int em28xx_compression_disable(struct em28xx *dev)
466 /* side effect of disabling scaler and mixer */
467 return em28xx_write_regs(dev, COMPR_REG, "\x00", 1);
470 inline static int em28xx_contrast_get(struct em28xx *dev)
472 return em28xx_read_reg(dev, YGAIN_REG) & 0x1f;
475 inline static int em28xx_brightness_get(struct em28xx *dev)
477 return em28xx_read_reg(dev, YOFFSET_REG);
480 inline static int em28xx_saturation_get(struct em28xx *dev)
482 return em28xx_read_reg(dev, UVGAIN_REG) & 0x1f;
485 inline static int em28xx_u_balance_get(struct em28xx *dev)
487 return em28xx_read_reg(dev, UOFFSET_REG);
490 inline static int em28xx_v_balance_get(struct em28xx *dev)
492 return em28xx_read_reg(dev, VOFFSET_REG);
495 inline static int em28xx_gamma_get(struct em28xx *dev)
497 return em28xx_read_reg(dev, GAMMA_REG) & 0x3f;
500 inline static int em28xx_contrast_set(struct em28xx *dev, s32 val)
503 return em28xx_write_regs(dev, YGAIN_REG, &tmp, 1);
506 inline static int em28xx_brightness_set(struct em28xx *dev, s32 val)
509 return em28xx_write_regs(dev, YOFFSET_REG, &tmp, 1);
512 inline static int em28xx_saturation_set(struct em28xx *dev, s32 val)
515 return em28xx_write_regs(dev, UVGAIN_REG, &tmp, 1);
518 inline static int em28xx_u_balance_set(struct em28xx *dev, s32 val)
521 return em28xx_write_regs(dev, UOFFSET_REG, &tmp, 1);
524 inline static int em28xx_v_balance_set(struct em28xx *dev, s32 val)
527 return em28xx_write_regs(dev, VOFFSET_REG, &tmp, 1);
530 inline static int em28xx_gamma_set(struct em28xx *dev, s32 val)
533 return em28xx_write_regs(dev, GAMMA_REG, &tmp, 1);
536 /*FIXME: maxw should be dependent of alt mode */
537 inline static unsigned int norm_maxw(struct em28xx *dev)
539 if (dev->max_range_640_480)
545 inline static unsigned int norm_maxh(struct em28xx *dev)
547 if (dev->max_range_640_480)
550 return (dev->norm & V4L2_STD_625_50) ? 576 : 480;