vino.c revision eda9e4e29492aff55ceb3f719a6011bddc60a892 
1/*
2 * Driver for the VINO (Video In No Out) system found in SGI Indys.
3 *
4 * This file is subject to the terms and conditions of the GNU General Public
5 * License version 2 as published by the Free Software Foundation.
6 *
7 * Copyright (C) 2004,2005 Mikael Nousiainen <tmnousia@cc.hut.fi>
8 *
9 * Based on the previous version of the driver for 2.4 kernels by:
10 * Copyright (C) 2003 Ladislav Michl <ladis@linux-mips.org>
11 */
12
13/*
14 * TODO:
15 * - remove "mark pages reserved-hacks" from memory allocation code
16 *   and implement fault()
17 * - check decimation, calculating and reporting image size when
18 *   using decimation
19 * - implement read(), user mode buffers and overlay (?)
20 */
21
22#include <linux/init.h>
23#include <linux/module.h>
24#include <linux/delay.h>
25#include <linux/dma-mapping.h>
26#include <linux/errno.h>
27#include <linux/fs.h>
28#include <linux/interrupt.h>
29#include <linux/kernel.h>
30#include <linux/mm.h>
31#include <linux/time.h>
32#include <linux/version.h>
33
34#ifdef CONFIG_KMOD
35#include <linux/kmod.h>
36#endif
37
38#include <linux/i2c.h>
39#include <linux/i2c-algo-sgi.h>
40
41#include <linux/videodev2.h>
42#include <media/v4l2-common.h>
43#include <media/v4l2-ioctl.h>
44#include <linux/video_decoder.h>
45#include <linux/mutex.h>
46
47#include <asm/paccess.h>
48#include <asm/io.h>
49#include <asm/sgi/ip22.h>
50#include <asm/sgi/mc.h>
51
52#include "vino.h"
53#include "saa7191.h"
54#include "indycam.h"
55
56/* Uncomment the following line to get lots and lots of (mostly useless)
57 * debug info.
58 * Note that the debug output also slows down the driver significantly */
59// #define VINO_DEBUG
60// #define VINO_DEBUG_INT
61
62#define VINO_MODULE_VERSION "0.0.5"
63#define VINO_VERSION_CODE KERNEL_VERSION(0, 0, 5)
64
65MODULE_DESCRIPTION("SGI VINO Video4Linux2 driver");
66MODULE_VERSION(VINO_MODULE_VERSION);
67MODULE_AUTHOR("Mikael Nousiainen <tmnousia@cc.hut.fi>");
68MODULE_LICENSE("GPL");
69
70#ifdef VINO_DEBUG
71#define dprintk(x...) printk("VINO: " x);
72#else
73#define dprintk(x...)
74#endif
75
76#define VINO_NO_CHANNEL			0
77#define VINO_CHANNEL_A			1
78#define VINO_CHANNEL_B			2
79
80#define VINO_PAL_WIDTH			768
81#define VINO_PAL_HEIGHT			576
82#define VINO_NTSC_WIDTH			640
83#define VINO_NTSC_HEIGHT		480
84
85#define VINO_MIN_WIDTH			32
86#define VINO_MIN_HEIGHT			32
87
88#define VINO_CLIPPING_START_ODD_D1	1
89#define VINO_CLIPPING_START_ODD_PAL	15
90#define VINO_CLIPPING_START_ODD_NTSC	12
91
92#define VINO_CLIPPING_START_EVEN_D1	2
93#define VINO_CLIPPING_START_EVEN_PAL	15
94#define VINO_CLIPPING_START_EVEN_NTSC	12
95
96#define VINO_INPUT_CHANNEL_COUNT	3
97
98/* the number is the index for vino_inputs */
99#define VINO_INPUT_NONE			-1
100#define VINO_INPUT_COMPOSITE		0
101#define VINO_INPUT_SVIDEO		1
102#define VINO_INPUT_D1			2
103
104#define VINO_PAGE_RATIO			(PAGE_SIZE / VINO_PAGE_SIZE)
105
106#define VINO_FIFO_THRESHOLD_DEFAULT	16
107
108#define VINO_FRAMEBUFFER_SIZE		((VINO_PAL_WIDTH \
109					  * VINO_PAL_HEIGHT * 4 \
110					  + 3 * PAGE_SIZE) & ~(PAGE_SIZE - 1))
111
112#define VINO_FRAMEBUFFER_COUNT_MAX	8
113
114#define VINO_FRAMEBUFFER_UNUSED		0
115#define VINO_FRAMEBUFFER_IN_USE		1
116#define VINO_FRAMEBUFFER_READY		2
117
118#define VINO_QUEUE_ERROR		-1
119#define VINO_QUEUE_MAGIC		0x20050125
120
121#define VINO_MEMORY_NONE		0
122#define VINO_MEMORY_MMAP		1
123#define VINO_MEMORY_USERPTR		2
124
125#define VINO_DUMMY_DESC_COUNT		4
126#define VINO_DESC_FETCH_DELAY		5	/* microseconds */
127
128#define VINO_MAX_FRAME_SKIP_COUNT	128
129
130/* the number is the index for vino_data_formats */
131#define VINO_DATA_FMT_NONE		-1
132#define VINO_DATA_FMT_GREY		0
133#define VINO_DATA_FMT_RGB332		1
134#define VINO_DATA_FMT_RGB32		2
135#define VINO_DATA_FMT_YUV		3
136
137#define VINO_DATA_FMT_COUNT		4
138
139/* the number is the index for vino_data_norms */
140#define VINO_DATA_NORM_NONE		-1
141#define VINO_DATA_NORM_NTSC		0
142#define VINO_DATA_NORM_PAL		1
143#define VINO_DATA_NORM_SECAM		2
144#define VINO_DATA_NORM_D1		3
145/* The following are special entries that can be used to
146 * autodetect the norm. */
147#define VINO_DATA_NORM_AUTO		0xfe
148#define VINO_DATA_NORM_AUTO_EXT		0xff
149
150#define VINO_DATA_NORM_COUNT		4
151
152/* Internal data structure definitions */
153
154struct vino_input {
155	char *name;
156	v4l2_std_id std;
157};
158
159struct vino_clipping {
160	unsigned int left, right, top, bottom;
161};
162
163struct vino_data_format {
164	/* the description */
165	char *description;
166	/* bytes per pixel */
167	unsigned int bpp;
168	/* V4L2 fourcc code */
169	__u32 pixelformat;
170	/* V4L2 colorspace (duh!) */
171	enum v4l2_colorspace colorspace;
172};
173
174struct vino_data_norm {
175	char *description;
176	unsigned int width, height;
177	struct vino_clipping odd;
178	struct vino_clipping even;
179
180	v4l2_std_id std;
181	unsigned int fps_min, fps_max;
182	__u32 framelines;
183};
184
185struct vino_descriptor_table {
186	/* the number of PAGE_SIZE sized pages in the buffer */
187	unsigned int page_count;
188	/* virtual (kmalloc'd) pointers to the actual data
189	 * (in PAGE_SIZE chunks, used with mmap streaming) */
190	unsigned long *virtual;
191
192	/* cpu address for the VINO descriptor table
193	 * (contains DMA addresses, VINO_PAGE_SIZE chunks) */
194	unsigned long *dma_cpu;
195	/* dma address for the VINO descriptor table
196	 * (contains DMA addresses, VINO_PAGE_SIZE chunks) */
197	dma_addr_t dma;
198};
199
200struct vino_framebuffer {
201	/* identifier nubmer */
202	unsigned int id;
203	/* the length of the whole buffer */
204	unsigned int size;
205	/* the length of actual data in buffer */
206	unsigned int data_size;
207	/* the data format */
208	unsigned int data_format;
209	/* the state of buffer data */
210	unsigned int state;
211	/* is the buffer mapped in user space? */
212	unsigned int map_count;
213	/* memory offset for mmap() */
214	unsigned int offset;
215	/* frame counter */
216	unsigned int frame_counter;
217	/* timestamp (written when image capture finishes) */
218	struct timeval timestamp;
219
220	struct vino_descriptor_table desc_table;
221
222	spinlock_t state_lock;
223};
224
225struct vino_framebuffer_fifo {
226	unsigned int length;
227
228	unsigned int used;
229	unsigned int head;
230	unsigned int tail;
231
232	unsigned int data[VINO_FRAMEBUFFER_COUNT_MAX];
233};
234
235struct vino_framebuffer_queue {
236	unsigned int magic;
237
238	/* VINO_MEMORY_NONE, VINO_MEMORY_MMAP or VINO_MEMORY_USERPTR */
239	unsigned int type;
240	unsigned int length;
241
242	/* data field of in and out contain index numbers for buffer */
243	struct vino_framebuffer_fifo in;
244	struct vino_framebuffer_fifo out;
245
246	struct vino_framebuffer *buffer[VINO_FRAMEBUFFER_COUNT_MAX];
247
248	spinlock_t queue_lock;
249	struct mutex queue_mutex;
250	wait_queue_head_t frame_wait_queue;
251};
252
253struct vino_interrupt_data {
254	struct timeval timestamp;
255	unsigned int frame_counter;
256	unsigned int skip_count;
257	unsigned int skip;
258};
259
260struct vino_channel_settings {
261	unsigned int channel;
262
263	int input;
264	unsigned int data_format;
265	unsigned int data_norm;
266	struct vino_clipping clipping;
267	unsigned int decimation;
268	unsigned int line_size;
269	unsigned int alpha;
270	unsigned int fps;
271	unsigned int framert_reg;
272
273	unsigned int fifo_threshold;
274
275	struct vino_framebuffer_queue fb_queue;
276
277	/* number of the current field */
278	unsigned int field;
279
280	/* read in progress */
281	int reading;
282	/* streaming is active */
283	int streaming;
284	/* the driver is currently processing the queue */
285	int capturing;
286
287	struct mutex mutex;
288	spinlock_t capture_lock;
289
290	unsigned int users;
291
292	struct vino_interrupt_data int_data;
293
294	/* V4L support */
295	struct video_device *v4l_device;
296};
297
298struct vino_client {
299	/* the channel which owns this client:
300	 * VINO_NO_CHANNEL, VINO_CHANNEL_A or VINO_CHANNEL_B */
301	unsigned int owner;
302	struct i2c_client *driver;
303};
304
305struct vino_settings {
306	struct vino_channel_settings a;
307	struct vino_channel_settings b;
308
309	struct vino_client decoder;
310	struct vino_client camera;
311
312	/* a lock for vino register access */
313	spinlock_t vino_lock;
314	/* a lock for channel input changes */
315	spinlock_t input_lock;
316
317	unsigned long dummy_page;
318	struct vino_descriptor_table dummy_desc_table;
319};
320
321/* Module parameters */
322
323/*
324 * Using vino_pixel_conversion the ABGR32-format pixels supplied
325 * by the VINO chip can be converted to more common formats
326 * like RGBA32 (or probably RGB24 in the future). This way we
327 * can give out data that can be specified correctly with
328 * the V4L2-definitions.
329 *
330 * The pixel format is specified as RGBA32 when no conversion
331 * is used.
332 *
333 * Note that this only affects the 32-bit bit depth.
334 *
335 * Use non-zero value to enable conversion.
336 */
337static int vino_pixel_conversion;
338
339module_param_named(pixelconv, vino_pixel_conversion, int, 0);
340
341MODULE_PARM_DESC(pixelconv,
342		 "enable pixel conversion (non-zero value enables)");
343
344/* Internal data structures */
345
346static struct sgi_vino *vino;
347
348static struct vino_settings *vino_drvdata;
349
350static const char *vino_driver_name = "vino";
351static const char *vino_driver_description = "SGI VINO";
352static const char *vino_bus_name = "GIO64 bus";
353static const char *vino_v4l_device_name_a = "SGI VINO Channel A";
354static const char *vino_v4l_device_name_b = "SGI VINO Channel B";
355
356static void vino_capture_tasklet(unsigned long channel);
357
358DECLARE_TASKLET(vino_tasklet_a, vino_capture_tasklet, VINO_CHANNEL_A);
359DECLARE_TASKLET(vino_tasklet_b, vino_capture_tasklet, VINO_CHANNEL_B);
360
361static const struct vino_input vino_inputs[] = {
362	{
363		.name		= "Composite",
364		.std		= V4L2_STD_NTSC | V4L2_STD_PAL
365		| V4L2_STD_SECAM,
366	},{
367		.name		= "S-Video",
368		.std		= V4L2_STD_NTSC | V4L2_STD_PAL
369		| V4L2_STD_SECAM,
370	},{
371		.name		= "D1/IndyCam",
372		.std		= V4L2_STD_NTSC,
373	}
374};
375
376static const struct vino_data_format vino_data_formats[] = {
377	{
378		.description	= "8-bit greyscale",
379		.bpp		= 1,
380		.pixelformat	= V4L2_PIX_FMT_GREY,
381		.colorspace	= V4L2_COLORSPACE_SMPTE170M,
382	},{
383		.description	= "8-bit dithered RGB 3-3-2",
384		.bpp		= 1,
385		.pixelformat	= V4L2_PIX_FMT_RGB332,
386		.colorspace	= V4L2_COLORSPACE_SRGB,
387	},{
388		.description	= "32-bit RGB",
389		.bpp		= 4,
390		.pixelformat	= V4L2_PIX_FMT_RGB32,
391		.colorspace	= V4L2_COLORSPACE_SRGB,
392	},{
393		.description	= "YUV 4:2:2",
394		.bpp		= 2,
395		.pixelformat	= V4L2_PIX_FMT_YUYV, // XXX: swapped?
396		.colorspace	= V4L2_COLORSPACE_SMPTE170M,
397	}
398};
399
400static const struct vino_data_norm vino_data_norms[] = {
401	{
402		.description	= "NTSC",
403		.std		= V4L2_STD_NTSC,
404		.fps_min	= 6,
405		.fps_max	= 30,
406		.framelines	= 525,
407		.width		= VINO_NTSC_WIDTH,
408		.height		= VINO_NTSC_HEIGHT,
409		.odd		= {
410			.top	= VINO_CLIPPING_START_ODD_NTSC,
411			.left	= 0,
412			.bottom	= VINO_CLIPPING_START_ODD_NTSC
413			+ VINO_NTSC_HEIGHT / 2 - 1,
414			.right	= VINO_NTSC_WIDTH,
415		},
416		.even		= {
417			.top	= VINO_CLIPPING_START_EVEN_NTSC,
418			.left	= 0,
419			.bottom	= VINO_CLIPPING_START_EVEN_NTSC
420			+ VINO_NTSC_HEIGHT / 2 - 1,
421			.right	= VINO_NTSC_WIDTH,
422		},
423	},{
424		.description	= "PAL",
425		.std		= V4L2_STD_PAL,
426		.fps_min	= 5,
427		.fps_max	= 25,
428		.framelines	= 625,
429		.width		= VINO_PAL_WIDTH,
430		.height		= VINO_PAL_HEIGHT,
431		.odd		= {
432			.top	= VINO_CLIPPING_START_ODD_PAL,
433			.left	= 0,
434			.bottom	= VINO_CLIPPING_START_ODD_PAL
435			+ VINO_PAL_HEIGHT / 2 - 1,
436			.right	= VINO_PAL_WIDTH,
437		},
438		.even		= {
439			.top	= VINO_CLIPPING_START_EVEN_PAL,
440			.left	= 0,
441			.bottom	= VINO_CLIPPING_START_EVEN_PAL
442			+ VINO_PAL_HEIGHT / 2 - 1,
443			.right	= VINO_PAL_WIDTH,
444		},
445	},{
446		.description	= "SECAM",
447		.std		= V4L2_STD_SECAM,
448		.fps_min	= 5,
449		.fps_max	= 25,
450		.framelines	= 625,
451		.width		= VINO_PAL_WIDTH,
452		.height		= VINO_PAL_HEIGHT,
453		.odd		= {
454			.top	= VINO_CLIPPING_START_ODD_PAL,
455			.left	= 0,
456			.bottom	= VINO_CLIPPING_START_ODD_PAL
457			+ VINO_PAL_HEIGHT / 2 - 1,
458			.right	= VINO_PAL_WIDTH,
459		},
460		.even		= {
461			.top	= VINO_CLIPPING_START_EVEN_PAL,
462			.left	= 0,
463			.bottom	= VINO_CLIPPING_START_EVEN_PAL
464			+ VINO_PAL_HEIGHT / 2 - 1,
465			.right	= VINO_PAL_WIDTH,
466		},
467	},{
468		.description	= "NTSC/D1",
469		.std		= V4L2_STD_NTSC,
470		.fps_min	= 6,
471		.fps_max	= 30,
472		.framelines	= 525,
473		.width		= VINO_NTSC_WIDTH,
474		.height		= VINO_NTSC_HEIGHT,
475		.odd		= {
476			.top	= VINO_CLIPPING_START_ODD_D1,
477			.left	= 0,
478			.bottom	= VINO_CLIPPING_START_ODD_D1
479			+ VINO_NTSC_HEIGHT / 2 - 1,
480			.right	= VINO_NTSC_WIDTH,
481		},
482		.even		= {
483			.top	= VINO_CLIPPING_START_EVEN_D1,
484			.left	= 0,
485			.bottom	= VINO_CLIPPING_START_EVEN_D1
486			+ VINO_NTSC_HEIGHT / 2 - 1,
487			.right	= VINO_NTSC_WIDTH,
488		},
489	}
490};
491
492#define VINO_INDYCAM_V4L2_CONTROL_COUNT		9
493
494struct v4l2_queryctrl vino_indycam_v4l2_controls[] = {
495	{
496		.id = V4L2_CID_AUTOGAIN,
497		.type = V4L2_CTRL_TYPE_BOOLEAN,
498		.name = "Automatic Gain Control",
499		.minimum = 0,
500		.maximum = 1,
501		.step = 1,
502		.default_value = INDYCAM_AGC_DEFAULT,
503		.flags = 0,
504		.reserved = { INDYCAM_CONTROL_AGC, 0 },
505	},{
506		.id = V4L2_CID_AUTO_WHITE_BALANCE,
507		.type = V4L2_CTRL_TYPE_BOOLEAN,
508		.name = "Automatic White Balance",
509		.minimum = 0,
510		.maximum = 1,
511		.step = 1,
512		.default_value = INDYCAM_AWB_DEFAULT,
513		.flags = 0,
514		.reserved = { INDYCAM_CONTROL_AWB, 0 },
515	},{
516		.id = V4L2_CID_GAIN,
517		.type = V4L2_CTRL_TYPE_INTEGER,
518		.name = "Gain",
519		.minimum = INDYCAM_GAIN_MIN,
520		.maximum = INDYCAM_GAIN_MAX,
521		.step = 1,
522		.default_value = INDYCAM_GAIN_DEFAULT,
523		.flags = 0,
524		.reserved = { INDYCAM_CONTROL_GAIN, 0 },
525	},{
526		.id = V4L2_CID_PRIVATE_BASE,
527		.type = V4L2_CTRL_TYPE_INTEGER,
528		.name = "Red Saturation",
529		.minimum = INDYCAM_RED_SATURATION_MIN,
530		.maximum = INDYCAM_RED_SATURATION_MAX,
531		.step = 1,
532		.default_value = INDYCAM_RED_SATURATION_DEFAULT,
533		.flags = 0,
534		.reserved = { INDYCAM_CONTROL_RED_SATURATION, 0 },
535	},{
536		.id = V4L2_CID_PRIVATE_BASE + 1,
537		.type = V4L2_CTRL_TYPE_INTEGER,
538		.name = "Blue Saturation",
539		.minimum = INDYCAM_BLUE_SATURATION_MIN,
540		.maximum = INDYCAM_BLUE_SATURATION_MAX,
541		.step = 1,
542		.default_value = INDYCAM_BLUE_SATURATION_DEFAULT,
543		.flags = 0,
544		.reserved = { INDYCAM_CONTROL_BLUE_SATURATION, 0 },
545	},{
546		.id = V4L2_CID_RED_BALANCE,
547		.type = V4L2_CTRL_TYPE_INTEGER,
548		.name = "Red Balance",
549		.minimum = INDYCAM_RED_BALANCE_MIN,
550		.maximum = INDYCAM_RED_BALANCE_MAX,
551		.step = 1,
552		.default_value = INDYCAM_RED_BALANCE_DEFAULT,
553		.flags = 0,
554		.reserved = { INDYCAM_CONTROL_RED_BALANCE, 0 },
555	},{
556		.id = V4L2_CID_BLUE_BALANCE,
557		.type = V4L2_CTRL_TYPE_INTEGER,
558		.name = "Blue Balance",
559		.minimum = INDYCAM_BLUE_BALANCE_MIN,
560		.maximum = INDYCAM_BLUE_BALANCE_MAX,
561		.step = 1,
562		.default_value = INDYCAM_BLUE_BALANCE_DEFAULT,
563		.flags = 0,
564		.reserved = { INDYCAM_CONTROL_BLUE_BALANCE, 0 },
565	},{
566		.id = V4L2_CID_EXPOSURE,
567		.type = V4L2_CTRL_TYPE_INTEGER,
568		.name = "Shutter Control",
569		.minimum = INDYCAM_SHUTTER_MIN,
570		.maximum = INDYCAM_SHUTTER_MAX,
571		.step = 1,
572		.default_value = INDYCAM_SHUTTER_DEFAULT,
573		.flags = 0,
574		.reserved = { INDYCAM_CONTROL_SHUTTER, 0 },
575	},{
576		.id = V4L2_CID_GAMMA,
577		.type = V4L2_CTRL_TYPE_INTEGER,
578		.name = "Gamma",
579		.minimum = INDYCAM_GAMMA_MIN,
580		.maximum = INDYCAM_GAMMA_MAX,
581		.step = 1,
582		.default_value = INDYCAM_GAMMA_DEFAULT,
583		.flags = 0,
584		.reserved = { INDYCAM_CONTROL_GAMMA, 0 },
585	}
586};
587
588#define VINO_SAA7191_V4L2_CONTROL_COUNT		9
589
590struct v4l2_queryctrl vino_saa7191_v4l2_controls[] = {
591	{
592		.id = V4L2_CID_HUE,
593		.type = V4L2_CTRL_TYPE_INTEGER,
594		.name = "Hue",
595		.minimum = SAA7191_HUE_MIN,
596		.maximum = SAA7191_HUE_MAX,
597		.step = 1,
598		.default_value = SAA7191_HUE_DEFAULT,
599		.flags = 0,
600		.reserved = { SAA7191_CONTROL_HUE, 0 },
601	},{
602		.id = V4L2_CID_PRIVATE_BASE,
603		.type = V4L2_CTRL_TYPE_INTEGER,
604		.name = "Luminance Bandpass",
605		.minimum = SAA7191_BANDPASS_MIN,
606		.maximum = SAA7191_BANDPASS_MAX,
607		.step = 1,
608		.default_value = SAA7191_BANDPASS_DEFAULT,
609		.flags = 0,
610		.reserved = { SAA7191_CONTROL_BANDPASS, 0 },
611	},{
612		.id = V4L2_CID_PRIVATE_BASE + 1,
613		.type = V4L2_CTRL_TYPE_INTEGER,
614		.name = "Luminance Bandpass Weight",
615		.minimum = SAA7191_BANDPASS_WEIGHT_MIN,
616		.maximum = SAA7191_BANDPASS_WEIGHT_MAX,
617		.step = 1,
618		.default_value = SAA7191_BANDPASS_WEIGHT_DEFAULT,
619		.flags = 0,
620		.reserved = { SAA7191_CONTROL_BANDPASS_WEIGHT, 0 },
621	},{
622		.id = V4L2_CID_PRIVATE_BASE + 2,
623		.type = V4L2_CTRL_TYPE_INTEGER,
624		.name = "HF Luminance Coring",
625		.minimum = SAA7191_CORING_MIN,
626		.maximum = SAA7191_CORING_MAX,
627		.step = 1,
628		.default_value = SAA7191_CORING_DEFAULT,
629		.flags = 0,
630		.reserved = { SAA7191_CONTROL_CORING, 0 },
631	},{
632		.id = V4L2_CID_PRIVATE_BASE + 3,
633		.type = V4L2_CTRL_TYPE_BOOLEAN,
634		.name = "Force Colour",
635		.minimum = SAA7191_FORCE_COLOUR_MIN,
636		.maximum = SAA7191_FORCE_COLOUR_MAX,
637		.step = 1,
638		.default_value = SAA7191_FORCE_COLOUR_DEFAULT,
639		.flags = 0,
640		.reserved = { SAA7191_CONTROL_FORCE_COLOUR, 0 },
641	},{
642		.id = V4L2_CID_PRIVATE_BASE + 4,
643		.type = V4L2_CTRL_TYPE_INTEGER,
644		.name = "Chrominance Gain Control",
645		.minimum = SAA7191_CHROMA_GAIN_MIN,
646		.maximum = SAA7191_CHROMA_GAIN_MAX,
647		.step = 1,
648		.default_value = SAA7191_CHROMA_GAIN_DEFAULT,
649		.flags = 0,
650		.reserved = { SAA7191_CONTROL_CHROMA_GAIN, 0 },
651	},{
652		.id = V4L2_CID_PRIVATE_BASE + 5,
653		.type = V4L2_CTRL_TYPE_BOOLEAN,
654		.name = "VTR Time Constant",
655		.minimum = SAA7191_VTRC_MIN,
656		.maximum = SAA7191_VTRC_MAX,
657		.step = 1,
658		.default_value = SAA7191_VTRC_DEFAULT,
659		.flags = 0,
660		.reserved = { SAA7191_CONTROL_VTRC, 0 },
661	},{
662		.id = V4L2_CID_PRIVATE_BASE + 6,
663		.type = V4L2_CTRL_TYPE_INTEGER,
664		.name = "Luminance Delay Compensation",
665		.minimum = SAA7191_LUMA_DELAY_MIN,
666		.maximum = SAA7191_LUMA_DELAY_MAX,
667		.step = 1,
668		.default_value = SAA7191_LUMA_DELAY_DEFAULT,
669		.flags = 0,
670		.reserved = { SAA7191_CONTROL_LUMA_DELAY, 0 },
671	},{
672		.id = V4L2_CID_PRIVATE_BASE + 7,
673		.type = V4L2_CTRL_TYPE_INTEGER,
674		.name = "Vertical Noise Reduction",
675		.minimum = SAA7191_VNR_MIN,
676		.maximum = SAA7191_VNR_MAX,
677		.step = 1,
678		.default_value = SAA7191_VNR_DEFAULT,
679		.flags = 0,
680		.reserved = { SAA7191_CONTROL_VNR, 0 },
681	}
682};
683
684/* VINO I2C bus functions */
685
686unsigned i2c_vino_getctrl(void *data)
687{
688	return vino->i2c_control;
689}
690
691void i2c_vino_setctrl(void *data, unsigned val)
692{
693	vino->i2c_control = val;
694}
695
696unsigned i2c_vino_rdata(void *data)
697{
698	return vino->i2c_data;
699}
700
701void i2c_vino_wdata(void *data, unsigned val)
702{
703	vino->i2c_data = val;
704}
705
706static struct i2c_algo_sgi_data i2c_sgi_vino_data =
707{
708	.getctrl = &i2c_vino_getctrl,
709	.setctrl = &i2c_vino_setctrl,
710	.rdata   = &i2c_vino_rdata,
711	.wdata   = &i2c_vino_wdata,
712	.xfer_timeout = 200,
713	.ack_timeout  = 1000,
714};
715
716/*
717 * There are two possible clients on VINO I2C bus, so we limit usage only
718 * to them.
719 */
720static int i2c_vino_client_reg(struct i2c_client *client)
721{
722	unsigned long flags;
723	int ret = 0;
724
725	spin_lock_irqsave(&vino_drvdata->input_lock, flags);
726	switch (client->driver->id) {
727	case I2C_DRIVERID_SAA7191:
728		if (vino_drvdata->decoder.driver)
729			ret = -EBUSY;
730		else
731			vino_drvdata->decoder.driver = client;
732		break;
733	case I2C_DRIVERID_INDYCAM:
734		if (vino_drvdata->camera.driver)
735			ret = -EBUSY;
736		else
737			vino_drvdata->camera.driver = client;
738		break;
739	default:
740		ret = -ENODEV;
741	}
742	spin_unlock_irqrestore(&vino_drvdata->input_lock, flags);
743
744	return ret;
745}
746
747static int i2c_vino_client_unreg(struct i2c_client *client)
748{
749	unsigned long flags;
750	int ret = 0;
751
752	spin_lock_irqsave(&vino_drvdata->input_lock, flags);
753	if (client == vino_drvdata->decoder.driver) {
754		if (vino_drvdata->decoder.owner != VINO_NO_CHANNEL)
755			ret = -EBUSY;
756		else
757			vino_drvdata->decoder.driver = NULL;
758	} else if (client == vino_drvdata->camera.driver) {
759		if (vino_drvdata->camera.owner != VINO_NO_CHANNEL)
760			ret = -EBUSY;
761		else
762			vino_drvdata->camera.driver = NULL;
763	}
764	spin_unlock_irqrestore(&vino_drvdata->input_lock, flags);
765
766	return ret;
767}
768
769static struct i2c_adapter vino_i2c_adapter =
770{
771	.name			= "VINO I2C bus",
772	.id			= I2C_HW_SGI_VINO,
773	.algo_data		= &i2c_sgi_vino_data,
774	.client_register	= &i2c_vino_client_reg,
775	.client_unregister	= &i2c_vino_client_unreg,
776};
777
778static int vino_i2c_add_bus(void)
779{
780	return i2c_sgi_add_bus(&vino_i2c_adapter);
781}
782
783static int vino_i2c_del_bus(void)
784{
785	return i2c_del_adapter(&vino_i2c_adapter);
786}
787
788static int i2c_camera_command(unsigned int cmd, void *arg)
789{
790	return vino_drvdata->camera.driver->
791		driver->command(vino_drvdata->camera.driver,
792				cmd, arg);
793}
794
795static int i2c_decoder_command(unsigned int cmd, void *arg)
796{
797	return vino_drvdata->decoder.driver->
798		driver->command(vino_drvdata->decoder.driver,
799				cmd, arg);
800}
801
802/* VINO framebuffer/DMA descriptor management */
803
804static void vino_free_buffer_with_count(struct vino_framebuffer *fb,
805					       unsigned int count)
806{
807	unsigned int i;
808
809	dprintk("vino_free_buffer_with_count(): count = %d\n", count);
810
811	for (i = 0; i < count; i++) {
812		ClearPageReserved(virt_to_page((void *)fb->desc_table.virtual[i]));
813		dma_unmap_single(NULL,
814				 fb->desc_table.dma_cpu[VINO_PAGE_RATIO * i],
815				 PAGE_SIZE, DMA_FROM_DEVICE);
816		free_page(fb->desc_table.virtual[i]);
817	}
818
819	dma_free_coherent(NULL,
820			  VINO_PAGE_RATIO * (fb->desc_table.page_count + 4) *
821			  sizeof(dma_addr_t), (void *)fb->desc_table.dma_cpu,
822			  fb->desc_table.dma);
823	kfree(fb->desc_table.virtual);
824
825	memset(fb, 0, sizeof(struct vino_framebuffer));
826}
827
828static void vino_free_buffer(struct vino_framebuffer *fb)
829{
830	vino_free_buffer_with_count(fb, fb->desc_table.page_count);
831}
832
833static int vino_allocate_buffer(struct vino_framebuffer *fb,
834				unsigned int size)
835{
836	unsigned int count, i, j;
837	int ret = 0;
838
839	dprintk("vino_allocate_buffer():\n");
840
841	if (size < 1)
842		return -EINVAL;
843
844	memset(fb, 0, sizeof(struct vino_framebuffer));
845
846	count = ((size / PAGE_SIZE) + 4) & ~3;
847
848	dprintk("vino_allocate_buffer(): size = %d, count = %d\n",
849		size, count);
850
851	/* allocate memory for table with virtual (page) addresses */
852	fb->desc_table.virtual = (unsigned long *)
853		kmalloc(count * sizeof(unsigned long), GFP_KERNEL);
854	if (!fb->desc_table.virtual)
855		return -ENOMEM;
856
857	/* allocate memory for table with dma addresses
858	 * (has space for four extra descriptors) */
859	fb->desc_table.dma_cpu =
860		dma_alloc_coherent(NULL, VINO_PAGE_RATIO * (count + 4) *
861				   sizeof(dma_addr_t), &fb->desc_table.dma,
862				   GFP_KERNEL | GFP_DMA);
863	if (!fb->desc_table.dma_cpu) {
864		ret = -ENOMEM;
865		goto out_free_virtual;
866	}
867
868	/* allocate pages for the buffer and acquire the according
869	 * dma addresses */
870	for (i = 0; i < count; i++) {
871		dma_addr_t dma_data_addr;
872
873		fb->desc_table.virtual[i] =
874			get_zeroed_page(GFP_KERNEL | GFP_DMA);
875		if (!fb->desc_table.virtual[i]) {
876			ret = -ENOBUFS;
877			break;
878		}
879
880		dma_data_addr =
881			dma_map_single(NULL,
882				       (void *)fb->desc_table.virtual[i],
883				       PAGE_SIZE, DMA_FROM_DEVICE);
884
885		for (j = 0; j < VINO_PAGE_RATIO; j++) {
886			fb->desc_table.dma_cpu[VINO_PAGE_RATIO * i + j] =
887				dma_data_addr + VINO_PAGE_SIZE * j;
888		}
889
890		SetPageReserved(virt_to_page((void *)fb->desc_table.virtual[i]));
891	}
892
893	/* page_count needs to be set anyway, because the descriptor table has
894	 * been allocated according to this number */
895	fb->desc_table.page_count = count;
896
897	if (ret) {
898		/* the descriptor with index i doesn't contain
899		 * a valid address yet */
900		vino_free_buffer_with_count(fb, i);
901		return ret;
902	}
903
904	//fb->size = size;
905	fb->size = count * PAGE_SIZE;
906	fb->data_format = VINO_DATA_FMT_NONE;
907
908	/* set the dma stop-bit for the last (count+1)th descriptor */
909	fb->desc_table.dma_cpu[VINO_PAGE_RATIO * count] = VINO_DESC_STOP;
910	return 0;
911
912 out_free_virtual:
913	kfree(fb->desc_table.virtual);
914	return ret;
915}
916
917#if 0
918/* user buffers not fully implemented yet */
919static int vino_prepare_user_buffer(struct vino_framebuffer *fb,
920				     void *user,
921				     unsigned int size)
922{
923	unsigned int count, i, j;
924	int ret = 0;
925
926	dprintk("vino_prepare_user_buffer():\n");
927
928	if (size < 1)
929		return -EINVAL;
930
931	memset(fb, 0, sizeof(struct vino_framebuffer));
932
933	count = ((size / PAGE_SIZE)) & ~3;
934
935	dprintk("vino_prepare_user_buffer(): size = %d, count = %d\n",
936		size, count);
937
938	/* allocate memory for table with virtual (page) addresses */
939	fb->desc_table.virtual = (unsigned long *)
940		kmalloc(count * sizeof(unsigned long), GFP_KERNEL);
941	if (!fb->desc_table.virtual)
942		return -ENOMEM;
943
944	/* allocate memory for table with dma addresses
945	 * (has space for four extra descriptors) */
946	fb->desc_table.dma_cpu =
947		dma_alloc_coherent(NULL, VINO_PAGE_RATIO * (count + 4) *
948				   sizeof(dma_addr_t), &fb->desc_table.dma,
949				   GFP_KERNEL | GFP_DMA);
950	if (!fb->desc_table.dma_cpu) {
951		ret = -ENOMEM;
952		goto out_free_virtual;
953	}
954
955	/* allocate pages for the buffer and acquire the according
956	 * dma addresses */
957	for (i = 0; i < count; i++) {
958		dma_addr_t dma_data_addr;
959
960		fb->desc_table.virtual[i] =
961			get_zeroed_page(GFP_KERNEL | GFP_DMA);
962		if (!fb->desc_table.virtual[i]) {
963			ret = -ENOBUFS;
964			break;
965		}
966
967		dma_data_addr =
968			dma_map_single(NULL,
969				       (void *)fb->desc_table.virtual[i],
970				       PAGE_SIZE, DMA_FROM_DEVICE);
971
972		for (j = 0; j < VINO_PAGE_RATIO; j++) {
973			fb->desc_table.dma_cpu[VINO_PAGE_RATIO * i + j] =
974				dma_data_addr + VINO_PAGE_SIZE * j;
975		}
976
977		SetPageReserved(virt_to_page((void *)fb->desc_table.virtual[i]));
978	}
979
980	/* page_count needs to be set anyway, because the descriptor table has
981	 * been allocated according to this number */
982	fb->desc_table.page_count = count;
983
984	if (ret) {
985		/* the descriptor with index i doesn't contain
986		 * a valid address yet */
987		vino_free_buffer_with_count(fb, i);
988		return ret;
989	}
990
991	//fb->size = size;
992	fb->size = count * PAGE_SIZE;
993
994	/* set the dma stop-bit for the last (count+1)th descriptor */
995	fb->desc_table.dma_cpu[VINO_PAGE_RATIO * count] = VINO_DESC_STOP;
996	return 0;
997
998 out_free_virtual:
999	kfree(fb->desc_table.virtual);
1000	return ret;
1001}
1002#endif
1003
1004static void vino_sync_buffer(struct vino_framebuffer *fb)
1005{
1006	int i;
1007
1008	dprintk("vino_sync_buffer():\n");
1009
1010	for (i = 0; i < fb->desc_table.page_count; i++)
1011		dma_sync_single(NULL,
1012				fb->desc_table.dma_cpu[VINO_PAGE_RATIO * i],
1013				PAGE_SIZE, DMA_FROM_DEVICE);
1014}
1015
1016/* Framebuffer fifo functions (need to be locked externally) */
1017
1018static inline void vino_fifo_init(struct vino_framebuffer_fifo *f,
1019			   unsigned int length)
1020{
1021	f->length = 0;
1022	f->used = 0;
1023	f->head = 0;
1024	f->tail = 0;
1025
1026	if (length > VINO_FRAMEBUFFER_COUNT_MAX)
1027		length = VINO_FRAMEBUFFER_COUNT_MAX;
1028
1029	f->length = length;
1030}
1031
1032/* returns true/false */
1033static inline int vino_fifo_has_id(struct vino_framebuffer_fifo *f,
1034				   unsigned int id)
1035{
1036	unsigned int i;
1037
1038	for (i = f->head; i == (f->tail - 1); i = (i + 1) % f->length) {
1039		if (f->data[i] == id)
1040			return 1;
1041	}
1042
1043	return 0;
1044}
1045
1046#if 0
1047/* returns true/false */
1048static inline int vino_fifo_full(struct vino_framebuffer_fifo *f)
1049{
1050	return (f->used == f->length);
1051}
1052#endif
1053
1054static inline unsigned int vino_fifo_get_used(struct vino_framebuffer_fifo *f)
1055{
1056	return f->used;
1057}
1058
1059static int vino_fifo_enqueue(struct vino_framebuffer_fifo *f, unsigned int id)
1060{
1061	if (id >= f->length) {
1062		return VINO_QUEUE_ERROR;
1063	}
1064
1065	if (vino_fifo_has_id(f, id)) {
1066		return VINO_QUEUE_ERROR;
1067	}
1068
1069	if (f->used < f->length) {
1070		f->data[f->tail] = id;
1071		f->tail = (f->tail + 1) % f->length;
1072		f->used++;
1073	} else {
1074		return VINO_QUEUE_ERROR;
1075	}
1076
1077	return 0;
1078}
1079
1080static int vino_fifo_peek(struct vino_framebuffer_fifo *f, unsigned int *id)
1081{
1082	if (f->used > 0) {
1083		*id = f->data[f->head];
1084	} else {
1085		return VINO_QUEUE_ERROR;
1086	}
1087
1088	return 0;
1089}
1090
1091static int vino_fifo_dequeue(struct vino_framebuffer_fifo *f, unsigned int *id)
1092{
1093	if (f->used > 0) {
1094		*id = f->data[f->head];
1095		f->head = (f->head + 1) % f->length;
1096		f->used--;
1097	} else {
1098		return VINO_QUEUE_ERROR;
1099	}
1100
1101	return 0;
1102}
1103
1104/* Framebuffer queue functions */
1105
1106/* execute with queue_lock locked */
1107static void vino_queue_free_with_count(struct vino_framebuffer_queue *q,
1108				       unsigned int length)
1109{
1110	unsigned int i;
1111
1112	q->length = 0;
1113	memset(&q->in, 0, sizeof(struct vino_framebuffer_fifo));
1114	memset(&q->out, 0, sizeof(struct vino_framebuffer_fifo));
1115	for (i = 0; i < length; i++) {
1116		dprintk("vino_queue_free_with_count(): freeing buffer %d\n",
1117			i);
1118		vino_free_buffer(q->buffer[i]);
1119		kfree(q->buffer[i]);
1120	}
1121
1122	q->type = VINO_MEMORY_NONE;
1123	q->magic = 0;
1124}
1125
1126static void vino_queue_free(struct vino_framebuffer_queue *q)
1127{
1128	dprintk("vino_queue_free():\n");
1129
1130	if (q->magic != VINO_QUEUE_MAGIC)
1131		return;
1132	if (q->type != VINO_MEMORY_MMAP)
1133		return;
1134
1135	mutex_lock(&q->queue_mutex);
1136
1137	vino_queue_free_with_count(q, q->length);
1138
1139	mutex_unlock(&q->queue_mutex);
1140}
1141
1142static int vino_queue_init(struct vino_framebuffer_queue *q,
1143			   unsigned int *length)
1144{
1145	unsigned int i;
1146	int ret = 0;
1147
1148	dprintk("vino_queue_init(): length = %d\n", *length);
1149
1150	if (q->magic == VINO_QUEUE_MAGIC) {
1151		dprintk("vino_queue_init(): queue already initialized!\n");
1152		return -EINVAL;
1153	}
1154
1155	if (q->type != VINO_MEMORY_NONE) {
1156		dprintk("vino_queue_init(): queue already initialized!\n");
1157		return -EINVAL;
1158	}
1159
1160	if (*length < 1)
1161		return -EINVAL;
1162
1163	mutex_lock(&q->queue_mutex);
1164
1165	if (*length > VINO_FRAMEBUFFER_COUNT_MAX)
1166		*length = VINO_FRAMEBUFFER_COUNT_MAX;
1167
1168	q->length = 0;
1169
1170	for (i = 0; i < *length; i++) {
1171		dprintk("vino_queue_init(): allocating buffer %d\n", i);
1172		q->buffer[i] = kmalloc(sizeof(struct vino_framebuffer),
1173				       GFP_KERNEL);
1174		if (!q->buffer[i]) {
1175			dprintk("vino_queue_init(): kmalloc() failed\n");
1176			ret = -ENOMEM;
1177			break;
1178		}
1179
1180		ret = vino_allocate_buffer(q->buffer[i],
1181					   VINO_FRAMEBUFFER_SIZE);
1182		if (ret) {
1183			kfree(q->buffer[i]);
1184			dprintk("vino_queue_init(): "
1185				"vino_allocate_buffer() failed\n");
1186			break;
1187		}
1188
1189		q->buffer[i]->id = i;
1190		if (i > 0) {
1191			q->buffer[i]->offset = q->buffer[i - 1]->offset +
1192				q->buffer[i - 1]->size;
1193		} else {
1194			q->buffer[i]->offset = 0;
1195		}
1196
1197		spin_lock_init(&q->buffer[i]->state_lock);
1198
1199		dprintk("vino_queue_init(): buffer = %d, offset = %d, "
1200			"size = %d\n", i, q->buffer[i]->offset,
1201			q->buffer[i]->size);
1202	}
1203
1204	if (ret) {
1205		vino_queue_free_with_count(q, i);
1206		*length = 0;
1207	} else {
1208		q->length = *length;
1209		vino_fifo_init(&q->in, q->length);
1210		vino_fifo_init(&q->out, q->length);
1211		q->type = VINO_MEMORY_MMAP;
1212		q->magic = VINO_QUEUE_MAGIC;
1213	}
1214
1215	mutex_unlock(&q->queue_mutex);
1216
1217	return ret;
1218}
1219
1220static struct vino_framebuffer *vino_queue_add(struct
1221					       vino_framebuffer_queue *q,
1222					       unsigned int id)
1223{
1224	struct vino_framebuffer *ret = NULL;
1225	unsigned int total;
1226	unsigned long flags;
1227
1228	dprintk("vino_queue_add(): id = %d\n", id);
1229
1230	if (q->magic != VINO_QUEUE_MAGIC) {
1231		return ret;
1232	}
1233
1234	spin_lock_irqsave(&q->queue_lock, flags);
1235
1236	if (q->length == 0)
1237		goto out;
1238
1239	if (id >= q->length)
1240		goto out;
1241
1242	/* not needed?: if (vino_fifo_full(&q->out)) {
1243		goto out;
1244		}*/
1245	/* check that outgoing queue isn't already full
1246	 * (or that it won't become full) */
1247	total = vino_fifo_get_used(&q->in) +
1248		vino_fifo_get_used(&q->out);
1249	if (total >= q->length)
1250		goto out;
1251
1252	if (vino_fifo_enqueue(&q->in, id))
1253		goto out;
1254
1255	ret = q->buffer[id];
1256
1257out:
1258	spin_unlock_irqrestore(&q->queue_lock, flags);
1259
1260	return ret;
1261}
1262
1263static struct vino_framebuffer *vino_queue_transfer(struct
1264						    vino_framebuffer_queue *q)
1265{
1266	struct vino_framebuffer *ret = NULL;
1267	struct vino_framebuffer *fb;
1268	int id;
1269	unsigned long flags;
1270
1271	dprintk("vino_queue_transfer():\n");
1272
1273	if (q->magic != VINO_QUEUE_MAGIC) {
1274		return ret;
1275	}
1276
1277	spin_lock_irqsave(&q->queue_lock, flags);
1278
1279	if (q->length == 0)
1280		goto out;
1281
1282	// now this actually removes an entry from the incoming queue
1283	if (vino_fifo_dequeue(&q->in, &id)) {
1284		goto out;
1285	}
1286
1287	dprintk("vino_queue_transfer(): id = %d\n", id);
1288	fb = q->buffer[id];
1289
1290	// we have already checked that the outgoing queue is not full, but...
1291	if (vino_fifo_enqueue(&q->out, id)) {
1292		printk(KERN_ERR "vino_queue_transfer(): "
1293		       "outgoing queue is full, this shouldn't happen!\n");
1294		goto out;
1295	}
1296
1297	ret = fb;
1298out:
1299	spin_unlock_irqrestore(&q->queue_lock, flags);
1300
1301	return ret;
1302}
1303
1304/* returns true/false */
1305static int vino_queue_incoming_contains(struct vino_framebuffer_queue *q,
1306					unsigned int id)
1307{
1308	int ret = 0;
1309	unsigned long flags;
1310
1311	if (q->magic != VINO_QUEUE_MAGIC) {
1312		return ret;
1313	}
1314
1315	spin_lock_irqsave(&q->queue_lock, flags);
1316
1317	if (q->length == 0)
1318		goto out;
1319
1320	ret = vino_fifo_has_id(&q->in, id);
1321
1322out:
1323	spin_unlock_irqrestore(&q->queue_lock, flags);
1324
1325	return ret;
1326}
1327
1328/* returns true/false */
1329static int vino_queue_outgoing_contains(struct vino_framebuffer_queue *q,
1330					unsigned int id)
1331{
1332	int ret = 0;
1333	unsigned long flags;
1334
1335	if (q->magic != VINO_QUEUE_MAGIC) {
1336		return ret;
1337	}
1338
1339	spin_lock_irqsave(&q->queue_lock, flags);
1340
1341	if (q->length == 0)
1342		goto out;
1343
1344	ret = vino_fifo_has_id(&q->out, id);
1345
1346out:
1347	spin_unlock_irqrestore(&q->queue_lock, flags);
1348
1349	return ret;
1350}
1351
1352static int vino_queue_get_incoming(struct vino_framebuffer_queue *q,
1353				   unsigned int *used)
1354{
1355	int ret = 0;
1356	unsigned long flags;
1357
1358	if (q->magic != VINO_QUEUE_MAGIC) {
1359		return VINO_QUEUE_ERROR;
1360	}
1361
1362	spin_lock_irqsave(&q->queue_lock, flags);
1363
1364	if (q->length == 0) {
1365		ret = VINO_QUEUE_ERROR;
1366		goto out;
1367	}
1368
1369	*used = vino_fifo_get_used(&q->in);
1370
1371out:
1372	spin_unlock_irqrestore(&q->queue_lock, flags);
1373
1374	return ret;
1375}
1376
1377static int vino_queue_get_outgoing(struct vino_framebuffer_queue *q,
1378				   unsigned int *used)
1379{
1380	int ret = 0;
1381	unsigned long flags;
1382
1383	if (q->magic != VINO_QUEUE_MAGIC) {
1384		return VINO_QUEUE_ERROR;
1385	}
1386
1387	spin_lock_irqsave(&q->queue_lock, flags);
1388
1389	if (q->length == 0) {
1390		ret = VINO_QUEUE_ERROR;
1391		goto out;
1392	}
1393
1394	*used = vino_fifo_get_used(&q->out);
1395
1396out:
1397	spin_unlock_irqrestore(&q->queue_lock, flags);
1398
1399	return ret;
1400}
1401
1402#if 0
1403static int vino_queue_get_total(struct vino_framebuffer_queue *q,
1404				unsigned int *total)
1405{
1406	int ret = 0;
1407	unsigned long flags;
1408
1409	if (q->magic != VINO_QUEUE_MAGIC) {
1410		return VINO_QUEUE_ERROR;
1411	}
1412
1413	spin_lock_irqsave(&q->queue_lock, flags);
1414
1415	if (q->length == 0) {
1416		ret = VINO_QUEUE_ERROR;
1417		goto out;
1418	}
1419
1420	*total = vino_fifo_get_used(&q->in) +
1421		vino_fifo_get_used(&q->out);
1422
1423out:
1424	spin_unlock_irqrestore(&q->queue_lock, flags);
1425
1426	return ret;
1427}
1428#endif
1429
1430static struct vino_framebuffer *vino_queue_peek(struct
1431						vino_framebuffer_queue *q,
1432						unsigned int *id)
1433{
1434	struct vino_framebuffer *ret = NULL;
1435	unsigned long flags;
1436
1437	if (q->magic != VINO_QUEUE_MAGIC) {
1438		return ret;
1439	}
1440
1441	spin_lock_irqsave(&q->queue_lock, flags);
1442
1443	if (q->length == 0)
1444		goto out;
1445
1446	if (vino_fifo_peek(&q->in, id)) {
1447		goto out;
1448	}
1449
1450	ret = q->buffer[*id];
1451out:
1452	spin_unlock_irqrestore(&q->queue_lock, flags);
1453
1454	return ret;
1455}
1456
1457static struct vino_framebuffer *vino_queue_remove(struct
1458						  vino_framebuffer_queue *q,
1459						  unsigned int *id)
1460{
1461	struct vino_framebuffer *ret = NULL;
1462	unsigned long flags;
1463	dprintk("vino_queue_remove():\n");
1464
1465	if (q->magic != VINO_QUEUE_MAGIC) {
1466		return ret;
1467	}
1468
1469	spin_lock_irqsave(&q->queue_lock, flags);
1470
1471	if (q->length == 0)
1472		goto out;
1473
1474	if (vino_fifo_dequeue(&q->out, id)) {
1475		goto out;
1476	}
1477
1478	dprintk("vino_queue_remove(): id = %d\n", *id);
1479	ret = q->buffer[*id];
1480out:
1481	spin_unlock_irqrestore(&q->queue_lock, flags);
1482
1483	return ret;
1484}
1485
1486static struct
1487vino_framebuffer *vino_queue_get_buffer(struct vino_framebuffer_queue *q,
1488					unsigned int id)
1489{
1490	struct vino_framebuffer *ret = NULL;
1491	unsigned long flags;
1492
1493	if (q->magic != VINO_QUEUE_MAGIC) {
1494		return ret;
1495	}
1496
1497	spin_lock_irqsave(&q->queue_lock, flags);
1498
1499	if (q->length == 0)
1500		goto out;
1501
1502	if (id >= q->length)
1503		goto out;
1504
1505	ret = q->buffer[id];
1506 out:
1507	spin_unlock_irqrestore(&q->queue_lock, flags);
1508
1509	return ret;
1510}
1511
1512static unsigned int vino_queue_get_length(struct vino_framebuffer_queue *q)
1513{
1514	unsigned int length = 0;
1515	unsigned long flags;
1516
1517	if (q->magic != VINO_QUEUE_MAGIC) {
1518		return length;
1519	}
1520
1521	spin_lock_irqsave(&q->queue_lock, flags);
1522	length = q->length;
1523	spin_unlock_irqrestore(&q->queue_lock, flags);
1524
1525	return length;
1526}
1527
1528static int vino_queue_has_mapped_buffers(struct vino_framebuffer_queue *q)
1529{
1530	unsigned int i;
1531	int ret = 0;
1532	unsigned long flags;
1533
1534	if (q->magic != VINO_QUEUE_MAGIC) {
1535		return ret;
1536	}
1537
1538	spin_lock_irqsave(&q->queue_lock, flags);
1539	for (i = 0; i < q->length; i++) {
1540		if (q->buffer[i]->map_count > 0) {
1541			ret = 1;
1542			break;
1543		}
1544	}
1545	spin_unlock_irqrestore(&q->queue_lock, flags);
1546
1547	return ret;
1548}
1549
1550/* VINO functions */
1551
1552/* execute with input_lock locked */
1553static void vino_update_line_size(struct vino_channel_settings *vcs)
1554{
1555	unsigned int w = vcs->clipping.right - vcs->clipping.left;
1556	unsigned int d = vcs->decimation;
1557	unsigned int bpp = vino_data_formats[vcs->data_format].bpp;
1558	unsigned int lsize;
1559
1560	dprintk("update_line_size(): before: w = %d, d = %d, "
1561		"line_size = %d\n", w, d, vcs->line_size);
1562
1563	/* line size must be multiple of 8 bytes */
1564	lsize = (bpp * (w / d)) & ~7;
1565	w = (lsize / bpp) * d;
1566
1567	vcs->clipping.right = vcs->clipping.left + w;
1568	vcs->line_size = lsize;
1569
1570	dprintk("update_line_size(): after: w = %d, d = %d, "
1571		"line_size = %d\n", w, d, vcs->line_size);
1572}
1573
1574/* execute with input_lock locked */
1575static void vino_set_clipping(struct vino_channel_settings *vcs,
1576			      unsigned int x, unsigned int y,
1577			      unsigned int w, unsigned int h)
1578{
1579	unsigned int maxwidth, maxheight;
1580	unsigned int d;
1581
1582	maxwidth = vino_data_norms[vcs->data_norm].width;
1583	maxheight = vino_data_norms[vcs->data_norm].height;
1584	d = vcs->decimation;
1585
1586	y &= ~1;	/* odd/even fields */
1587
1588	if (x > maxwidth) {
1589		x = 0;
1590	}
1591	if (y > maxheight) {
1592		y = 0;
1593	}
1594
1595	if (((w / d) < VINO_MIN_WIDTH)
1596	    || ((h / d) < VINO_MIN_HEIGHT)) {
1597		w = VINO_MIN_WIDTH * d;
1598		h = VINO_MIN_HEIGHT * d;
1599	}
1600
1601	if ((x + w) > maxwidth) {
1602		w = maxwidth - x;
1603		if ((w / d) < VINO_MIN_WIDTH)
1604			x = maxwidth - VINO_MIN_WIDTH * d;
1605	}
1606	if ((y + h) > maxheight) {
1607		h = maxheight - y;
1608		if ((h / d) < VINO_MIN_HEIGHT)
1609			y = maxheight - VINO_MIN_HEIGHT * d;
1610	}
1611
1612	vcs->clipping.left = x;
1613	vcs->clipping.top = y;
1614	vcs->clipping.right = x + w;
1615	vcs->clipping.bottom = y + h;
1616
1617	vino_update_line_size(vcs);
1618
1619	dprintk("clipping %d, %d, %d, %d / %d - %d\n",
1620		vcs->clipping.left, vcs->clipping.top, vcs->clipping.right,
1621		vcs->clipping.bottom, vcs->decimation, vcs->line_size);
1622}
1623
1624/* execute with input_lock locked */
1625static inline void vino_set_default_clipping(struct vino_channel_settings *vcs)
1626{
1627	vino_set_clipping(vcs, 0, 0, vino_data_norms[vcs->data_norm].width,
1628			  vino_data_norms[vcs->data_norm].height);
1629}
1630
1631/* execute with input_lock locked */
1632static void vino_set_scaling(struct vino_channel_settings *vcs,
1633			     unsigned int w, unsigned int h)
1634{
1635	unsigned int x, y, curw, curh, d;
1636
1637	x = vcs->clipping.left;
1638	y = vcs->clipping.top;
1639	curw = vcs->clipping.right - vcs->clipping.left;
1640	curh = vcs->clipping.bottom - vcs->clipping.top;
1641
1642	d = max(curw / w, curh / h);
1643
1644	dprintk("scaling w: %d, h: %d, curw: %d, curh: %d, d: %d\n",
1645		w, h, curw, curh, d);
1646
1647	if (d < 1) {
1648		d = 1;
1649	} else if (d > 8) {
1650		d = 8;
1651	}
1652
1653	vcs->decimation = d;
1654	vino_set_clipping(vcs, x, y, w * d, h * d);
1655
1656	dprintk("scaling %d, %d, %d, %d / %d - %d\n", vcs->clipping.left,
1657		vcs->clipping.top, vcs->clipping.right, vcs->clipping.bottom,
1658		vcs->decimation, vcs->line_size);
1659}
1660
1661/* execute with input_lock locked */
1662static inline void vino_set_default_scaling(struct vino_channel_settings *vcs)
1663{
1664	vino_set_scaling(vcs, vcs->clipping.right - vcs->clipping.left,
1665			 vcs->clipping.bottom - vcs->clipping.top);
1666}
1667
1668/* execute with input_lock locked */
1669static void vino_set_framerate(struct vino_channel_settings *vcs,
1670			       unsigned int fps)
1671{
1672	unsigned int mask;
1673
1674	switch (vcs->data_norm) {
1675	case VINO_DATA_NORM_NTSC:
1676	case VINO_DATA_NORM_D1:
1677		fps = (unsigned int)(fps / 6) * 6; // FIXME: round!
1678
1679		if (fps < vino_data_norms[vcs->data_norm].fps_min)
1680			fps = vino_data_norms[vcs->data_norm].fps_min;
1681		if (fps > vino_data_norms[vcs->data_norm].fps_max)
1682			fps = vino_data_norms[vcs->data_norm].fps_max;
1683
1684		switch (fps) {
1685		case 6:
1686			mask = 0x003;
1687			break;
1688		case 12:
1689			mask = 0x0c3;
1690			break;
1691		case 18:
1692			mask = 0x333;
1693			break;
1694		case 24:
1695			mask = 0x3ff;
1696			break;
1697		case 30:
1698			mask = 0xfff;
1699			break;
1700		default:
1701			mask = VINO_FRAMERT_FULL;
1702		}
1703		vcs->framert_reg = VINO_FRAMERT_RT(mask);
1704		break;
1705	case VINO_DATA_NORM_PAL:
1706	case VINO_DATA_NORM_SECAM:
1707		fps = (unsigned int)(fps / 5) * 5; // FIXME: round!
1708
1709		if (fps < vino_data_norms[vcs->data_norm].fps_min)
1710			fps = vino_data_norms[vcs->data_norm].fps_min;
1711		if (fps > vino_data_norms[vcs->data_norm].fps_max)
1712			fps = vino_data_norms[vcs->data_norm].fps_max;
1713
1714		switch (fps) {
1715		case 5:
1716			mask = 0x003;
1717			break;
1718		case 10:
1719			mask = 0x0c3;
1720			break;
1721		case 15:
1722			mask = 0x333;
1723			break;
1724		case 20:
1725			mask = 0x0ff;
1726			break;
1727		case 25:
1728			mask = 0x3ff;
1729			break;
1730		default:
1731			mask = VINO_FRAMERT_FULL;
1732		}
1733		vcs->framert_reg = VINO_FRAMERT_RT(mask) | VINO_FRAMERT_PAL;
1734		break;
1735	}
1736
1737	vcs->fps = fps;
1738}
1739
1740/* execute with input_lock locked */
1741static inline void vino_set_default_framerate(struct
1742					      vino_channel_settings *vcs)
1743{
1744	vino_set_framerate(vcs, vino_data_norms[vcs->data_norm].fps_max);
1745}
1746
1747/*
1748 * Prepare VINO for DMA transfer...
1749 * (execute only with vino_lock and input_lock locked)
1750 */
1751static int vino_dma_setup(struct vino_channel_settings *vcs,
1752			  struct vino_framebuffer *fb)
1753{
1754	u32 ctrl, intr;
1755	struct sgi_vino_channel *ch;
1756	const struct vino_data_norm *norm;
1757
1758	dprintk("vino_dma_setup():\n");
1759
1760	vcs->field = 0;
1761	fb->frame_counter = 0;
1762
1763	ch = (vcs->channel == VINO_CHANNEL_A) ? &vino->a : &vino->b;
1764	norm = &vino_data_norms[vcs->data_norm];
1765
1766	ch->page_index = 0;
1767	ch->line_count = 0;
1768
1769	/* VINO line size register is set 8 bytes less than actual */
1770	ch->line_size = vcs->line_size - 8;
1771
1772	/* let VINO know where to transfer data */
1773	ch->start_desc_tbl = fb->desc_table.dma;
1774	ch->next_4_desc = fb->desc_table.dma;
1775
1776	/* give vino time to fetch the first four descriptors, 5 usec
1777	 * should be more than enough time */
1778	udelay(VINO_DESC_FETCH_DELAY);
1779
1780	dprintk("vino_dma_setup(): start desc = %08x, next 4 desc = %08x\n",
1781		ch->start_desc_tbl, ch->next_4_desc);
1782
1783	/* set the alpha register */
1784	ch->alpha = vcs->alpha;
1785
1786	/* set clipping registers */
1787	ch->clip_start = VINO_CLIP_ODD(norm->odd.top + vcs->clipping.top / 2) |
1788		VINO_CLIP_EVEN(norm->even.top +
1789			       vcs->clipping.top / 2) |
1790		VINO_CLIP_X(vcs->clipping.left);
1791	ch->clip_end = VINO_CLIP_ODD(norm->odd.top +
1792				     vcs->clipping.bottom / 2 - 1) |
1793		VINO_CLIP_EVEN(norm->even.top +
1794			       vcs->clipping.bottom / 2 - 1) |
1795		VINO_CLIP_X(vcs->clipping.right);
1796
1797	/* set the size of actual content in the buffer (DECIMATION !) */
1798	fb->data_size = ((vcs->clipping.right - vcs->clipping.left) /
1799			 vcs->decimation) *
1800		((vcs->clipping.bottom - vcs->clipping.top) /
1801		 vcs->decimation) *
1802		vino_data_formats[vcs->data_format].bpp;
1803
1804	ch->frame_rate = vcs->framert_reg;
1805
1806	ctrl = vino->control;
1807	intr = vino->intr_status;
1808
1809	if (vcs->channel == VINO_CHANNEL_A) {
1810		/* All interrupt conditions for this channel was cleared
1811		 * so clear the interrupt status register and enable
1812		 * interrupts */
1813		intr &=	~VINO_INTSTAT_A;
1814		ctrl |= VINO_CTRL_A_INT;
1815
1816		/* enable synchronization */
1817		ctrl |= VINO_CTRL_A_SYNC_ENBL;
1818
1819		/* enable frame assembly */
1820		ctrl |= VINO_CTRL_A_INTERLEAVE_ENBL;
1821
1822		/* set decimation used */
1823		if (vcs->decimation < 2)
1824			ctrl &= ~VINO_CTRL_A_DEC_ENBL;
1825		else {
1826			ctrl |= VINO_CTRL_A_DEC_ENBL;
1827			ctrl &= ~VINO_CTRL_A_DEC_SCALE_MASK;
1828			ctrl |= (vcs->decimation - 1) <<
1829				VINO_CTRL_A_DEC_SCALE_SHIFT;
1830		}
1831
1832		/* select input interface */
1833		if (vcs->input == VINO_INPUT_D1)
1834			ctrl |= VINO_CTRL_A_SELECT;
1835		else
1836			ctrl &= ~VINO_CTRL_A_SELECT;
1837
1838		/* palette */
1839		ctrl &= ~(VINO_CTRL_A_LUMA_ONLY | VINO_CTRL_A_RGB |
1840			  VINO_CTRL_A_DITHER);
1841	} else {
1842		intr &= ~VINO_INTSTAT_B;
1843		ctrl |= VINO_CTRL_B_INT;
1844
1845		ctrl |= VINO_CTRL_B_SYNC_ENBL;
1846		ctrl |= VINO_CTRL_B_INTERLEAVE_ENBL;
1847
1848		if (vcs->decimation < 2)
1849			ctrl &= ~VINO_CTRL_B_DEC_ENBL;
1850		else {
1851			ctrl |= VINO_CTRL_B_DEC_ENBL;
1852			ctrl &= ~VINO_CTRL_B_DEC_SCALE_MASK;
1853			ctrl |= (vcs->decimation - 1) <<
1854				VINO_CTRL_B_DEC_SCALE_SHIFT;
1855
1856		}
1857		if (vcs->input == VINO_INPUT_D1)
1858			ctrl |= VINO_CTRL_B_SELECT;
1859		else
1860			ctrl &= ~VINO_CTRL_B_SELECT;
1861
1862		ctrl &= ~(VINO_CTRL_B_LUMA_ONLY | VINO_CTRL_B_RGB |
1863			  VINO_CTRL_B_DITHER);
1864	}
1865
1866	/* set palette */
1867	fb->data_format = vcs->data_format;
1868
1869	switch (vcs->data_format) {
1870		case VINO_DATA_FMT_GREY:
1871			ctrl |= (vcs->channel == VINO_CHANNEL_A) ?
1872				VINO_CTRL_A_LUMA_ONLY : VINO_CTRL_B_LUMA_ONLY;
1873			break;
1874		case VINO_DATA_FMT_RGB32:
1875			ctrl |= (vcs->channel == VINO_CHANNEL_A) ?
1876				VINO_CTRL_A_RGB : VINO_CTRL_B_RGB;
1877			break;
1878		case VINO_DATA_FMT_YUV:
1879			/* nothing needs to be done */
1880			break;
1881		case VINO_DATA_FMT_RGB332:
1882			ctrl |= (vcs->channel == VINO_CHANNEL_A) ?
1883				VINO_CTRL_A_RGB | VINO_CTRL_A_DITHER :
1884				VINO_CTRL_B_RGB | VINO_CTRL_B_DITHER;
1885			break;
1886	}
1887
1888	vino->intr_status = intr;
1889	vino->control = ctrl;
1890
1891	return 0;
1892}
1893
1894/* (execute only with vino_lock locked) */
1895static inline void vino_dma_start(struct vino_channel_settings *vcs)
1896{
1897	u32 ctrl = vino->control;
1898
1899	dprintk("vino_dma_start():\n");
1900	ctrl |= (vcs->channel == VINO_CHANNEL_A) ?
1901		VINO_CTRL_A_DMA_ENBL : VINO_CTRL_B_DMA_ENBL;
1902	vino->control = ctrl;
1903}
1904
1905/* (execute only with vino_lock locked) */
1906static inline void vino_dma_stop(struct vino_channel_settings *vcs)
1907{
1908	u32 ctrl = vino->control;
1909
1910	ctrl &= (vcs->channel == VINO_CHANNEL_A) ?
1911		~VINO_CTRL_A_DMA_ENBL : ~VINO_CTRL_B_DMA_ENBL;
1912	ctrl &= (vcs->channel == VINO_CHANNEL_A) ?
1913		~VINO_CTRL_A_INT : ~VINO_CTRL_B_INT;
1914	vino->control = ctrl;
1915	dprintk("vino_dma_stop():\n");
1916}
1917
1918/*
1919 * Load dummy page to descriptor registers. This prevents generating of
1920 * spurious interrupts. (execute only with vino_lock locked)
1921 */
1922static void vino_clear_interrupt(struct vino_channel_settings *vcs)
1923{
1924	struct sgi_vino_channel *ch;
1925
1926	ch = (vcs->channel == VINO_CHANNEL_A) ? &vino->a : &vino->b;
1927
1928	ch->page_index = 0;
1929	ch->line_count = 0;
1930
1931	ch->start_desc_tbl = vino_drvdata->dummy_desc_table.dma;
1932	ch->next_4_desc = vino_drvdata->dummy_desc_table.dma;
1933
1934	udelay(VINO_DESC_FETCH_DELAY);
1935	dprintk("channel %c clear interrupt condition\n",
1936	       (vcs->channel == VINO_CHANNEL_A) ? 'A':'B');
1937}
1938
1939static int vino_capture(struct vino_channel_settings *vcs,
1940			struct vino_framebuffer *fb)
1941{
1942	int err = 0;
1943	unsigned long flags, flags2;
1944
1945	spin_lock_irqsave(&fb->state_lock, flags);
1946
1947	if (fb->state == VINO_FRAMEBUFFER_IN_USE)
1948		err = -EBUSY;
1949	fb->state = VINO_FRAMEBUFFER_IN_USE;
1950
1951	spin_unlock_irqrestore(&fb->state_lock, flags);
1952
1953	if (err)
1954		return err;
1955
1956	spin_lock_irqsave(&vino_drvdata->vino_lock, flags);
1957	spin_lock_irqsave(&vino_drvdata->input_lock, flags2);
1958
1959	vino_dma_setup(vcs, fb);
1960	vino_dma_start(vcs);
1961
1962	spin_unlock_irqrestore(&vino_drvdata->input_lock, flags2);
1963	spin_unlock_irqrestore(&vino_drvdata->vino_lock, flags);
1964
1965	return err;
1966}
1967
1968static
1969struct vino_framebuffer *vino_capture_enqueue(struct
1970					      vino_channel_settings *vcs,
1971					      unsigned int index)
1972{
1973	struct vino_framebuffer *fb;
1974	unsigned long flags;
1975
1976	dprintk("vino_capture_enqueue():\n");
1977
1978	spin_lock_irqsave(&vcs->capture_lock, flags);
1979
1980	fb = vino_queue_add(&vcs->fb_queue, index);
1981	if (fb == NULL) {
1982		dprintk("vino_capture_enqueue(): vino_queue_add() failed, "
1983			"queue full?\n");
1984		goto out;
1985	}
1986out:
1987	spin_unlock_irqrestore(&vcs->capture_lock, flags);
1988
1989	return fb;
1990}
1991
1992static int vino_capture_next(struct vino_channel_settings *vcs, int start)
1993{
1994	struct vino_framebuffer *fb;
1995	unsigned int incoming, id;
1996	int err = 0;
1997	unsigned long flags;
1998
1999	dprintk("vino_capture_next():\n");
2000
2001	spin_lock_irqsave(&vcs->capture_lock, flags);
2002
2003	if (start) {
2004		/* start capture only if capture isn't in progress already */
2005		if (vcs->capturing) {
2006			spin_unlock_irqrestore(&vcs->capture_lock, flags);
2007			return 0;
2008		}
2009
2010	} else {
2011		/* capture next frame:
2012		 * stop capture if capturing is not set */
2013		if (!vcs->capturing) {
2014			spin_unlock_irqrestore(&vcs->capture_lock, flags);
2015			return 0;
2016		}
2017	}
2018
2019	err = vino_queue_get_incoming(&vcs->fb_queue, &incoming);
2020	if (err) {
2021		dprintk("vino_capture_next(): vino_queue_get_incoming() "
2022			"failed\n");
2023		err = -EINVAL;
2024		goto out;
2025	}
2026	if (incoming == 0) {
2027		dprintk("vino_capture_next(): no buffers available\n");
2028		goto out;
2029	}
2030
2031	fb = vino_queue_peek(&vcs->fb_queue, &id);
2032	if (fb == NULL) {
2033		dprintk("vino_capture_next(): vino_queue_peek() failed\n");
2034		err = -EINVAL;
2035		goto out;
2036	}
2037
2038	if (start) {
2039		vcs->capturing = 1;
2040	}
2041
2042	spin_unlock_irqrestore(&vcs->capture_lock, flags);
2043
2044	err = vino_capture(vcs, fb);
2045
2046	return err;
2047
2048out:
2049	vcs->capturing = 0;
2050	spin_unlock_irqrestore(&vcs->capture_lock, flags);
2051
2052	return err;
2053}
2054
2055static inline int vino_is_capturing(struct vino_channel_settings *vcs)
2056{
2057	int ret;
2058	unsigned long flags;
2059
2060	spin_lock_irqsave(&vcs->capture_lock, flags);
2061
2062	ret = vcs->capturing;
2063
2064	spin_unlock_irqrestore(&vcs->capture_lock, flags);
2065
2066	return ret;
2067}
2068
2069/* waits until a frame is captured */
2070static int vino_wait_for_frame(struct vino_channel_settings *vcs)
2071{
2072	wait_queue_t wait;
2073	int err = 0;
2074
2075	dprintk("vino_wait_for_frame():\n");
2076
2077	init_waitqueue_entry(&wait, current);
2078	/* add ourselves into wait queue */
2079	add_wait_queue(&vcs->fb_queue.frame_wait_queue, &wait);
2080
2081	/* to ensure that schedule_timeout will return immediately
2082	 * if VINO interrupt was triggered meanwhile */
2083	schedule_timeout_interruptible(msecs_to_jiffies(100));
2084
2085	if (signal_pending(current))
2086		err = -EINTR;
2087
2088	remove_wait_queue(&vcs->fb_queue.frame_wait_queue, &wait);
2089
2090	dprintk("vino_wait_for_frame(): waiting for frame %s\n",
2091		err ? "failed" : "ok");
2092
2093	return err;
2094}
2095
2096/* the function assumes that PAGE_SIZE % 4 == 0 */
2097static void vino_convert_to_rgba(struct vino_framebuffer *fb) {
2098	unsigned char *pageptr;
2099	unsigned int page, i;
2100	unsigned char a;
2101
2102	for (page = 0; page < fb->desc_table.page_count; page++) {
2103		pageptr = (unsigned char *)fb->desc_table.virtual[page];
2104
2105		for (i = 0; i < PAGE_SIZE; i += 4) {
2106			a = pageptr[0];
2107			pageptr[0] = pageptr[3];
2108			pageptr[1] = pageptr[2];
2109			pageptr[2] = pageptr[1];
2110			pageptr[3] = a;
2111			pageptr += 4;
2112		}
2113	}
2114}
2115
2116/* checks if the buffer is in correct state and syncs data */
2117static int vino_check_buffer(struct vino_channel_settings *vcs,
2118			     struct vino_framebuffer *fb)
2119{
2120	int err = 0;
2121	unsigned long flags;
2122
2123	dprintk("vino_check_buffer():\n");
2124
2125	spin_lock_irqsave(&fb->state_lock, flags);
2126	switch (fb->state) {
2127	case VINO_FRAMEBUFFER_IN_USE:
2128		err = -EIO;
2129		break;
2130	case VINO_FRAMEBUFFER_READY:
2131		vino_sync_buffer(fb);
2132		fb->state = VINO_FRAMEBUFFER_UNUSED;
2133		break;
2134	default:
2135		err = -EINVAL;
2136	}
2137	spin_unlock_irqrestore(&fb->state_lock, flags);
2138
2139	if (!err) {
2140		if (vino_pixel_conversion
2141		    && (fb->data_format == VINO_DATA_FMT_RGB32)) {
2142			vino_convert_to_rgba(fb);
2143		}
2144	} else if (err && (err != -EINVAL)) {
2145		dprintk("vino_check_buffer(): buffer not ready\n");
2146
2147		spin_lock_irqsave(&vino_drvdata->vino_lock, flags);
2148		vino_dma_stop(vcs);
2149		vino_clear_interrupt(vcs);
2150		spin_unlock_irqrestore(&vino_drvdata->vino_lock, flags);
2151	}
2152
2153	return err;
2154}
2155
2156/* forcefully terminates capture */
2157static void vino_capture_stop(struct vino_channel_settings *vcs)
2158{
2159	unsigned int incoming = 0, outgoing = 0, id;
2160	unsigned long flags, flags2;
2161
2162	dprintk("vino_capture_stop():\n");
2163
2164	spin_lock_irqsave(&vcs->capture_lock, flags);
2165
2166	/* unset capturing to stop queue processing */
2167	vcs->capturing = 0;
2168
2169	spin_lock_irqsave(&vino_drvdata->vino_lock, flags2);
2170
2171	vino_dma_stop(vcs);
2172	vino_clear_interrupt(vcs);
2173
2174	spin_unlock_irqrestore(&vino_drvdata->vino_lock, flags2);
2175
2176	/* remove all items from the queue */
2177	if (vino_queue_get_incoming(&vcs->fb_queue, &incoming)) {
2178		dprintk("vino_capture_stop(): "
2179			"vino_queue_get_incoming() failed\n");
2180		goto out;
2181	}
2182	while (incoming > 0) {
2183		vino_queue_transfer(&vcs->fb_queue);
2184
2185		if (vino_queue_get_incoming(&vcs->fb_queue, &incoming)) {
2186			dprintk("vino_capture_stop(): "
2187				"vino_queue_get_incoming() failed\n");
2188			goto out;
2189		}
2190	}
2191
2192	if (vino_queue_get_outgoing(&vcs->fb_queue, &outgoing)) {
2193		dprintk("vino_capture_stop(): "
2194			"vino_queue_get_outgoing() failed\n");
2195		goto out;
2196	}
2197	while (outgoing > 0) {
2198		vino_queue_remove(&vcs->fb_queue, &id);
2199
2200		if (vino_queue_get_outgoing(&vcs->fb_queue, &outgoing)) {
2201			dprintk("vino_capture_stop(): "
2202				"vino_queue_get_outgoing() failed\n");
2203			goto out;
2204		}
2205	}
2206
2207out:
2208	spin_unlock_irqrestore(&vcs->capture_lock, flags);
2209}
2210
2211#if 0
2212static int vino_capture_failed(struct vino_channel_settings *vcs)
2213{
2214	struct vino_framebuffer *fb;
2215	unsigned long flags;
2216	unsigned int i;
2217	int ret;
2218
2219	dprintk("vino_capture_failed():\n");
2220
2221	spin_lock_irqsave(&vino_drvdata->vino_lock, flags);
2222
2223	vino_dma_stop(vcs);
2224	vino_clear_interrupt(vcs);
2225
2226	spin_unlock_irqrestore(&vino_drvdata->vino_lock, flags);
2227
2228	ret = vino_queue_get_incoming(&vcs->fb_queue, &i);
2229	if (ret == VINO_QUEUE_ERROR) {
2230		dprintk("vino_queue_get_incoming() failed\n");
2231		return -EINVAL;
2232	}
2233	if (i == 0) {
2234		/* no buffers to process */
2235		return 0;
2236	}
2237
2238	fb = vino_queue_peek(&vcs->fb_queue, &i);
2239	if (fb == NULL) {
2240		dprintk("vino_queue_peek() failed\n");
2241		return -EINVAL;
2242	}
2243
2244	spin_lock_irqsave(&fb->state_lock, flags);
2245	if (fb->state == VINO_FRAMEBUFFER_IN_USE) {
2246		fb->state = VINO_FRAMEBUFFER_UNUSED;
2247		vino_queue_transfer(&vcs->fb_queue);
2248		vino_queue_remove(&vcs->fb_queue, &i);
2249		/* we should actually discard the newest frame,
2250		 * but who cares ... */
2251	}
2252	spin_unlock_irqrestore(&fb->state_lock, flags);
2253
2254	return 0;
2255}
2256#endif
2257
2258static void vino_skip_frame(struct vino_channel_settings *vcs)
2259{
2260	struct vino_framebuffer *fb;
2261	unsigned long flags;
2262	unsigned int id;
2263
2264	spin_lock_irqsave(&vcs->capture_lock, flags);
2265	fb = vino_queue_peek(&vcs->fb_queue, &id);
2266	if (!fb) {
2267		spin_unlock_irqrestore(&vcs->capture_lock, flags);
2268		dprintk("vino_skip_frame(): vino_queue_peek() failed!\n");
2269		return;
2270	}
2271	spin_unlock_irqrestore(&vcs->capture_lock, flags);
2272
2273	spin_lock_irqsave(&fb->state_lock, flags);
2274	fb->state = VINO_FRAMEBUFFER_UNUSED;
2275	spin_unlock_irqrestore(&fb->state_lock, flags);
2276
2277	vino_capture_next(vcs, 0);
2278}
2279
2280static void vino_frame_done(struct vino_channel_settings *vcs)
2281{
2282	struct vino_framebuffer *fb;
2283	unsigned long flags;
2284
2285	spin_lock_irqsave(&vcs->capture_lock, flags);
2286	fb = vino_queue_transfer(&vcs->fb_queue);
2287	if (!fb) {
2288		spin_unlock_irqrestore(&vcs->capture_lock, flags);
2289		dprintk("vino_frame_done(): vino_queue_transfer() failed!\n");
2290		return;
2291	}
2292	spin_unlock_irqrestore(&vcs->capture_lock, flags);
2293
2294	fb->frame_counter = vcs->int_data.frame_counter;
2295	memcpy(&fb->timestamp, &vcs->int_data.timestamp,
2296	       sizeof(struct timeval));
2297
2298	spin_lock_irqsave(&fb->state_lock, flags);
2299	if (fb->state == VINO_FRAMEBUFFER_IN_USE)
2300		fb->state = VINO_FRAMEBUFFER_READY;
2301	spin_unlock_irqrestore(&fb->state_lock, flags);
2302
2303	wake_up(&vcs->fb_queue.frame_wait_queue);
2304
2305	vino_capture_next(vcs, 0);
2306}
2307
2308static void vino_capture_tasklet(unsigned long channel) {
2309	struct vino_channel_settings *vcs;
2310
2311	vcs = (channel == VINO_CHANNEL_A)
2312		? &vino_drvdata->a : &vino_drvdata->b;
2313
2314	if (vcs->int_data.skip)
2315		vcs->int_data.skip_count++;
2316
2317	if (vcs->int_data.skip && (vcs->int_data.skip_count
2318				   <= VINO_MAX_FRAME_SKIP_COUNT)) {
2319		vino_skip_frame(vcs);
2320	} else {
2321		vcs->int_data.skip_count = 0;
2322		vino_frame_done(vcs);
2323	}
2324}
2325
2326static irqreturn_t vino_interrupt(int irq, void *dev_id)
2327{
2328	u32 ctrl, intr;
2329	unsigned int fc_a, fc_b;
2330	int handled_a = 0, skip_a = 0, done_a = 0;
2331	int handled_b = 0, skip_b = 0, done_b = 0;
2332
2333#ifdef VINO_DEBUG_INT
2334	int loop = 0;
2335	unsigned int line_count = vino->a.line_count,
2336		page_index = vino->a.page_index,
2337		field_counter = vino->a.field_counter,
2338		start_desc_tbl = vino->a.start_desc_tbl,
2339		next_4_desc = vino->a.next_4_desc;
2340	unsigned int line_count_2,
2341		page_index_2,
2342		field_counter_2,
2343		start_desc_tbl_2,
2344		next_4_desc_2;
2345#endif
2346
2347	spin_lock(&vino_drvdata->vino_lock);
2348
2349	while ((intr = vino->intr_status)) {
2350		fc_a = vino->a.field_counter >> 1;
2351		fc_b = vino->b.field_counter >> 1;
2352
2353		/* handle error-interrupts in some special way ?
2354		 * --> skips frames */
2355		if (intr & VINO_INTSTAT_A) {
2356			if (intr & VINO_INTSTAT_A_EOF) {
2357				vino_drvdata->a.field++;
2358				if (vino_drvdata->a.field > 1) {
2359					vino_dma_stop(&vino_drvdata->a);
2360					vino_clear_interrupt(&vino_drvdata->a);
2361					vino_drvdata->a.field = 0;
2362					done_a = 1;
2363				} else {
2364					if (vino->a.page_index
2365					    != vino_drvdata->a.line_size) {
2366						vino->a.line_count = 0;
2367						vino->a.page_index =
2368							vino_drvdata->
2369							a.line_size;
2370						vino->a.next_4_desc =
2371							vino->a.start_desc_tbl;
2372					}
2373				}
2374				dprintk("channel A end-of-field "
2375					"interrupt: %04x\n", intr);
2376			} else {
2377				vino_dma_stop(&vino_drvdata->a);
2378				vino_clear_interrupt(&vino_drvdata->a);
2379				vino_drvdata->a.field = 0;
2380				skip_a = 1;
2381				dprintk("channel A error interrupt: %04x\n",
2382					intr);
2383			}
2384
2385#ifdef VINO_DEBUG_INT
2386			line_count_2 = vino->a.line_count;
2387			page_index_2 = vino->a.page_index;
2388			field_counter_2 = vino->a.field_counter;
2389			start_desc_tbl_2 = vino->a.start_desc_tbl;
2390			next_4_desc_2 = vino->a.next_4_desc;
2391
2392			printk("intr = %04x, loop = %d, field = %d\n",
2393			       intr, loop, vino_drvdata->a.field);
2394			printk("1- line count = %04d, page index = %04d, "
2395			       "start = %08x, next = %08x\n"
2396			       "   fieldc = %d, framec = %d\n",
2397			       line_count, page_index, start_desc_tbl,
2398			       next_4_desc, field_counter, fc_a);
2399			printk("12-line count = %04d, page index = %04d, "
2400			       "   start = %08x, next = %08x\n",
2401			       line_count_2, page_index_2, start_desc_tbl_2,
2402			       next_4_desc_2);
2403
2404			if (done_a)
2405				printk("\n");
2406#endif
2407		}
2408
2409		if (intr & VINO_INTSTAT_B) {
2410			if (intr & VINO_INTSTAT_B_EOF) {
2411				vino_drvdata->b.field++;
2412				if (vino_drvdata->b.field > 1) {
2413					vino_dma_stop(&vino_drvdata->b);
2414					vino_clear_interrupt(&vino_drvdata->b);
2415					vino_drvdata->b.field = 0;
2416					done_b = 1;
2417				}
2418				dprintk("channel B end-of-field "
2419					"interrupt: %04x\n", intr);
2420			} else {
2421				vino_dma_stop(&vino_drvdata->b);
2422				vino_clear_interrupt(&vino_drvdata->b);
2423				vino_drvdata->b.field = 0;
2424				skip_b = 1;
2425				dprintk("channel B error interrupt: %04x\n",
2426					intr);
2427			}
2428		}
2429
2430		/* Always remember to clear interrupt status.
2431		 * Disable VINO interrupts while we do this. */
2432		ctrl = vino->control;
2433		vino->control = ctrl & ~(VINO_CTRL_A_INT | VINO_CTRL_B_INT);
2434		vino->intr_status = ~intr;
2435		vino->control = ctrl;
2436
2437		spin_unlock(&vino_drvdata->vino_lock);
2438
2439		if ((!handled_a) && (done_a || skip_a)) {
2440			if (!skip_a) {
2441				do_gettimeofday(&vino_drvdata->
2442						a.int_data.timestamp);
2443				vino_drvdata->a.int_data.frame_counter = fc_a;
2444			}
2445			vino_drvdata->a.int_data.skip = skip_a;
2446
2447			dprintk("channel A %s, interrupt: %d\n",
2448				skip_a ? "skipping frame" : "frame done",
2449				intr);
2450			tasklet_hi_schedule(&vino_tasklet_a);
2451			handled_a = 1;
2452		}
2453
2454		if ((!handled_b) && (done_b || skip_b)) {
2455			if (!skip_b) {
2456				do_gettimeofday(&vino_drvdata->
2457						b.int_data.timestamp);
2458				vino_drvdata->b.int_data.frame_counter = fc_b;
2459			}
2460			vino_drvdata->b.int_data.skip = skip_b;
2461
2462			dprintk("channel B %s, interrupt: %d\n",
2463				skip_b ? "skipping frame" : "frame done",
2464				intr);
2465			tasklet_hi_schedule(&vino_tasklet_b);
2466			handled_b = 1;
2467		}
2468
2469#ifdef VINO_DEBUG_INT
2470		loop++;
2471#endif
2472		spin_lock(&vino_drvdata->vino_lock);
2473	}
2474
2475	spin_unlock(&vino_drvdata->vino_lock);
2476
2477	return IRQ_HANDLED;
2478}
2479
2480/* VINO video input management */
2481
2482static int vino_get_saa7191_input(int input)
2483{
2484	switch (input) {
2485	case VINO_INPUT_COMPOSITE:
2486		return SAA7191_INPUT_COMPOSITE;
2487	case VINO_INPUT_SVIDEO:
2488		return SAA7191_INPUT_SVIDEO;
2489	default:
2490		printk(KERN_ERR "VINO: vino_get_saa7191_input(): "
2491		       "invalid input!\n");
2492		return -1;
2493	}
2494}
2495
2496static int vino_get_saa7191_norm(unsigned int data_norm)
2497{
2498	switch (data_norm) {
2499	case VINO_DATA_NORM_AUTO:
2500		return SAA7191_NORM_AUTO;
2501	case VINO_DATA_NORM_AUTO_EXT:
2502		return SAA7191_NORM_AUTO_EXT;
2503	case VINO_DATA_NORM_PAL:
2504		return SAA7191_NORM_PAL;
2505	case VINO_DATA_NORM_NTSC:
2506		return SAA7191_NORM_NTSC;
2507	case VINO_DATA_NORM_SECAM:
2508		return SAA7191_NORM_SECAM;
2509	default:
2510		printk(KERN_ERR "VINO: vino_get_saa7191_norm(): "
2511		       "invalid norm!\n");
2512		return -1;
2513	}
2514}
2515
2516static int vino_get_from_saa7191_norm(int saa7191_norm)
2517{
2518	switch (saa7191_norm) {
2519	case SAA7191_NORM_PAL:
2520		return VINO_DATA_NORM_PAL;
2521	case SAA7191_NORM_NTSC:
2522		return VINO_DATA_NORM_NTSC;
2523	case SAA7191_NORM_SECAM:
2524		return VINO_DATA_NORM_SECAM;
2525	default:
2526		printk(KERN_ERR "VINO: vino_get_from_saa7191_norm(): "
2527		       "invalid norm!\n");
2528		return VINO_DATA_NORM_NONE;
2529	}
2530}
2531
2532static int vino_saa7191_set_norm(unsigned int *data_norm)
2533{
2534	int saa7191_norm, new_data_norm;
2535	int err = 0;
2536
2537	saa7191_norm = vino_get_saa7191_norm(*data_norm);
2538
2539	err = i2c_decoder_command(DECODER_SAA7191_SET_NORM,
2540				  &saa7191_norm);
2541	if (err)
2542		goto out;
2543
2544	if ((*data_norm == VINO_DATA_NORM_AUTO)
2545	    || (*data_norm == VINO_DATA_NORM_AUTO_EXT)) {
2546		struct saa7191_status status;
2547
2548		err = i2c_decoder_command(DECODER_SAA7191_GET_STATUS,
2549					  &status);
2550		if (err)
2551			goto out;
2552
2553		new_data_norm =
2554			vino_get_from_saa7191_norm(status.norm);
2555		if (new_data_norm == VINO_DATA_NORM_NONE) {
2556			err = -EINVAL;
2557			goto out;
2558		}
2559
2560		*data_norm = (unsigned int)new_data_norm;
2561	}
2562
2563out:
2564	return err;
2565}
2566
2567/* execute with input_lock locked */
2568static int vino_is_input_owner(struct vino_channel_settings *vcs)
2569{
2570	switch(vcs->input) {
2571	case VINO_INPUT_COMPOSITE:
2572	case VINO_INPUT_SVIDEO:
2573		return (vino_drvdata->decoder.owner == vcs->channel);
2574	case VINO_INPUT_D1:
2575		return (vino_drvdata->camera.owner == vcs->channel);
2576	default:
2577		return 0;
2578	}
2579}
2580
2581static int vino_acquire_input(struct vino_channel_settings *vcs)
2582{
2583	unsigned long flags;
2584	int ret = 0;
2585
2586	dprintk("vino_acquire_input():\n");
2587
2588	spin_lock_irqsave(&vino_drvdata->input_lock, flags);
2589
2590	/* First try D1 and then SAA7191 */
2591	if (vino_drvdata->camera.driver
2592	    && (vino_drvdata->camera.owner == VINO_NO_CHANNEL)) {
2593		i2c_use_client(vino_drvdata->camera.driver);
2594		vino_drvdata->camera.owner = vcs->channel;
2595		vcs->input = VINO_INPUT_D1;
2596		vcs->data_norm = VINO_DATA_NORM_D1;
2597	} else if (vino_drvdata->decoder.driver
2598		   && (vino_drvdata->decoder.owner == VINO_NO_CHANNEL)) {
2599		int input, data_norm;
2600		int saa7191_input;
2601
2602		i2c_use_client(vino_drvdata->decoder.driver);
2603		input = VINO_INPUT_COMPOSITE;
2604
2605		saa7191_input = vino_get_saa7191_input(input);
2606		ret = i2c_decoder_command(DECODER_SET_INPUT,
2607					  &saa7191_input);
2608		if (ret) {
2609			ret = -EINVAL;
2610			goto out;
2611		}
2612
2613		spin_unlock_irqrestore(&vino_drvdata->input_lock, flags);
2614
2615		/* Don't hold spinlocks while auto-detecting norm
2616		 * as it may take a while... */
2617
2618		data_norm = VINO_DATA_NORM_AUTO_EXT;
2619
2620		ret = vino_saa7191_set_norm(&data_norm);
2621		if ((ret == -EBUSY) || (ret == -EAGAIN)) {
2622			data_norm = VINO_DATA_NORM_PAL;
2623			ret = vino_saa7191_set_norm(&data_norm);
2624		}
2625
2626		spin_lock_irqsave(&vino_drvdata->input_lock, flags);
2627
2628		if (ret) {
2629			ret = -EINVAL;
2630			goto out;
2631		}
2632
2633		vino_drvdata->decoder.owner = vcs->channel;
2634
2635		vcs->input = input;
2636		vcs->data_norm = data_norm;
2637	} else {
2638		vcs->input = (vcs->channel == VINO_CHANNEL_A) ?
2639			vino_drvdata->b.input : vino_drvdata->a.input;
2640		vcs->data_norm = (vcs->channel == VINO_CHANNEL_A) ?
2641			vino_drvdata->b.data_norm : vino_drvdata->a.data_norm;
2642	}
2643
2644	if (vcs->input == VINO_INPUT_NONE) {
2645		ret = -ENODEV;
2646		goto out;
2647	}
2648
2649	vino_set_default_clipping(vcs);
2650	vino_set_default_scaling(vcs);
2651	vino_set_default_framerate(vcs);
2652
2653	dprintk("vino_acquire_input(): %s\n", vino_inputs[vcs->input].name);
2654
2655out:
2656	spin_unlock_irqrestore(&vino_drvdata->input_lock, flags);
2657
2658	return ret;
2659}
2660
2661static int vino_set_input(struct vino_channel_settings *vcs, int input)
2662{
2663	struct vino_channel_settings *vcs2 = (vcs->channel == VINO_CHANNEL_A) ?
2664		&vino_drvdata->b : &vino_drvdata->a;
2665	unsigned long flags;
2666	int ret = 0;
2667
2668	dprintk("vino_set_input():\n");
2669
2670	spin_lock_irqsave(&vino_drvdata->input_lock, flags);
2671
2672	if (vcs->input == input)
2673		goto out;
2674
2675	switch (input) {
2676	case VINO_INPUT_COMPOSITE:
2677	case VINO_INPUT_SVIDEO:
2678		if (!vino_drvdata->decoder.driver) {
2679			ret = -EINVAL;
2680			goto out;
2681		}
2682
2683		if (vino_drvdata->decoder.owner == VINO_NO_CHANNEL) {
2684			i2c_use_client(vino_drvdata->decoder.driver);
2685			vino_drvdata->decoder.owner = vcs->channel;
2686		}
2687
2688		if (vino_drvdata->decoder.owner == vcs->channel) {
2689			int data_norm;
2690			int saa7191_input;
2691
2692			saa7191_input = vino_get_saa7191_input(input);
2693			ret = i2c_decoder_command(DECODER_SET_INPUT,
2694						  &saa7191_input);
2695			if (ret) {
2696				vino_drvdata->decoder.owner = VINO_NO_CHANNEL;
2697				ret = -EINVAL;
2698				goto out;
2699			}
2700
2701			spin_unlock_irqrestore(&vino_drvdata->input_lock, flags);
2702
2703			/* Don't hold spinlocks while auto-detecting norm
2704			 * as it may take a while... */
2705
2706			data_norm = VINO_DATA_NORM_AUTO_EXT;
2707
2708			ret = vino_saa7191_set_norm(&data_norm);
2709			if ((ret  == -EBUSY) || (ret == -EAGAIN)) {
2710				data_norm = VINO_DATA_NORM_PAL;
2711				ret = vino_saa7191_set_norm(&data_norm);
2712			}
2713
2714			spin_lock_irqsave(&vino_drvdata->input_lock, flags);
2715
2716			if (ret) {
2717				vino_drvdata->decoder.owner = VINO_NO_CHANNEL;
2718				ret = -EINVAL;
2719				goto out;
2720			}
2721
2722			vcs->input = input;
2723			vcs->data_norm = data_norm;
2724		} else {
2725			if (input != vcs2->input) {
2726				ret = -EBUSY;
2727				goto out;
2728			}
2729
2730			vcs->input = input;
2731			vcs->data_norm = vcs2->data_norm;
2732		}
2733
2734		if (vino_drvdata->camera.owner == vcs->channel) {
2735			/* Transfer the ownership or release the input */
2736			if (vcs2->input == VINO_INPUT_D1) {
2737				vino_drvdata->camera.owner = vcs2->channel;
2738			} else {
2739				i2c_release_client(vino_drvdata->
2740						   camera.driver);
2741				vino_drvdata->camera.owner = VINO_NO_CHANNEL;
2742			}
2743		}
2744		break;
2745	case VINO_INPUT_D1:
2746		if (!vino_drvdata->camera.driver) {
2747			ret = -EINVAL;
2748			goto out;
2749		}
2750
2751		if (vino_drvdata->camera.owner == VINO_NO_CHANNEL) {
2752			i2c_use_client(vino_drvdata->camera.driver);
2753			vino_drvdata->camera.owner = vcs->channel;
2754		}
2755
2756		if (vino_drvdata->decoder.owner == vcs->channel) {
2757			/* Transfer the ownership or release the input */
2758			if ((vcs2->input == VINO_INPUT_COMPOSITE) ||
2759				 (vcs2->input == VINO_INPUT_SVIDEO)) {
2760				vino_drvdata->decoder.owner = vcs2->channel;
2761			} else {
2762				i2c_release_client(vino_drvdata->
2763						   decoder.driver);
2764				vino_drvdata->decoder.owner = VINO_NO_CHANNEL;
2765			}
2766		}
2767
2768		vcs->input = input;
2769		vcs->data_norm = VINO_DATA_NORM_D1;
2770		break;
2771	default:
2772		ret = -EINVAL;
2773		goto out;
2774	}
2775
2776	vino_set_default_clipping(vcs);
2777	vino_set_default_scaling(vcs);
2778	vino_set_default_framerate(vcs);
2779
2780	dprintk("vino_set_input(): %s\n", vino_inputs[vcs->input].name);
2781
2782out:
2783	spin_unlock_irqrestore(&vino_drvdata->input_lock, flags);
2784
2785	return ret;
2786}
2787
2788static void vino_release_input(struct vino_channel_settings *vcs)
2789{
2790	struct vino_channel_settings *vcs2 = (vcs->channel == VINO_CHANNEL_A) ?
2791		&vino_drvdata->b : &vino_drvdata->a;
2792	unsigned long flags;
2793
2794	dprintk("vino_release_input():\n");
2795
2796	spin_lock_irqsave(&vino_drvdata->input_lock, flags);
2797
2798	/* Release ownership of the channel
2799	 * and if the other channel takes input from
2800	 * the same source, transfer the ownership */
2801	if (vino_drvdata->camera.owner == vcs->channel) {
2802		if (vcs2->input == VINO_INPUT_D1) {
2803			vino_drvdata->camera.owner = vcs2->channel;
2804		} else {
2805			i2c_release_client(vino_drvdata->camera.driver);
2806			vino_drvdata->camera.owner = VINO_NO_CHANNEL;
2807		}
2808	} else if (vino_drvdata->decoder.owner == vcs->channel) {
2809		if ((vcs2->input == VINO_INPUT_COMPOSITE) ||
2810			 (vcs2->input == VINO_INPUT_SVIDEO)) {
2811			vino_drvdata->decoder.owner = vcs2->channel;
2812		} else {
2813			i2c_release_client(vino_drvdata->decoder.driver);
2814			vino_drvdata->decoder.owner = VINO_NO_CHANNEL;
2815		}
2816	}
2817	vcs->input = VINO_INPUT_NONE;
2818
2819	spin_unlock_irqrestore(&vino_drvdata->input_lock, flags);
2820}
2821
2822/* execute with input_lock locked */
2823static int vino_set_data_norm(struct vino_channel_settings *vcs,
2824			      unsigned int data_norm,
2825			      unsigned long *flags)
2826{
2827	int err = 0;
2828
2829	if (data_norm == vcs->data_norm)
2830		return 0;
2831
2832	switch (vcs->input) {
2833	case VINO_INPUT_D1:
2834		/* only one "norm" supported */
2835		if ((data_norm != VINO_DATA_NORM_D1)
2836		    && (data_norm != VINO_DATA_NORM_AUTO)
2837		    && (data_norm != VINO_DATA_NORM_AUTO_EXT))
2838			return -EINVAL;
2839		break;
2840	case VINO_INPUT_COMPOSITE:
2841	case VINO_INPUT_SVIDEO: {
2842		if ((data_norm != VINO_DATA_NORM_PAL)
2843		    && (data_norm != VINO_DATA_NORM_NTSC)
2844		    && (data_norm != VINO_DATA_NORM_SECAM)
2845		    && (data_norm != VINO_DATA_NORM_AUTO)
2846		    && (data_norm != VINO_DATA_NORM_AUTO_EXT))
2847			return -EINVAL;
2848
2849		spin_unlock_irqrestore(&vino_drvdata->input_lock, *flags);
2850
2851		/* Don't hold spinlocks while setting norm
2852		 * as it may take a while... */
2853
2854		err = vino_saa7191_set_norm(&data_norm);
2855
2856		spin_lock_irqsave(&vino_drvdata->input_lock, *flags);
2857
2858		if (err)
2859			goto out;
2860
2861		vcs->data_norm = data_norm;
2862
2863		vino_set_default_clipping(vcs);
2864		vino_set_default_scaling(vcs);
2865		vino_set_default_framerate(vcs);
2866		break;
2867	}
2868	default:
2869		return -EINVAL;
2870	}
2871
2872out:
2873	return err;
2874}
2875
2876/* V4L2 helper functions */
2877
2878static int vino_find_data_format(__u32 pixelformat)
2879{
2880	int i;
2881
2882	for (i = 0; i < VINO_DATA_FMT_COUNT; i++) {
2883		if (vino_data_formats[i].pixelformat == pixelformat)
2884			return i;
2885	}
2886
2887	return VINO_DATA_FMT_NONE;
2888}
2889
2890static int vino_enum_data_norm(struct vino_channel_settings *vcs, __u32 index)
2891{
2892	int data_norm = VINO_DATA_NORM_NONE;
2893	unsigned long flags;
2894
2895	spin_lock_irqsave(&vino_drvdata->input_lock, flags);
2896	switch(vcs->input) {
2897	case VINO_INPUT_COMPOSITE:
2898	case VINO_INPUT_SVIDEO:
2899		if (index == 0) {
2900			data_norm = VINO_DATA_NORM_PAL;
2901		} else if (index == 1) {
2902			data_norm = VINO_DATA_NORM_NTSC;
2903		} else if (index == 2) {
2904			data_norm = VINO_DATA_NORM_SECAM;
2905		}
2906		break;
2907	case VINO_INPUT_D1:
2908		if (index == 0) {
2909			data_norm = VINO_DATA_NORM_D1;
2910		}
2911		break;
2912	}
2913	spin_unlock_irqrestore(&vino_drvdata->input_lock, flags);
2914
2915	return data_norm;
2916}
2917
2918static int vino_enum_input(struct vino_channel_settings *vcs, __u32 index)
2919{
2920	int input = VINO_INPUT_NONE;
2921	unsigned long flags;
2922
2923	spin_lock_irqsave(&vino_drvdata->input_lock, flags);
2924	if (vino_drvdata->decoder.driver && vino_drvdata->camera.driver) {
2925		switch (index) {
2926		case 0:
2927			input = VINO_INPUT_COMPOSITE;
2928			break;
2929		case 1:
2930			input = VINO_INPUT_SVIDEO;
2931			break;
2932		case 2:
2933			input = VINO_INPUT_D1;
2934			break;
2935		}
2936	} else if (vino_drvdata->decoder.driver) {
2937		switch (index) {
2938		case 0:
2939			input = VINO_INPUT_COMPOSITE;
2940			break;
2941		case 1:
2942			input = VINO_INPUT_SVIDEO;
2943			break;
2944		}
2945	} else if (vino_drvdata->camera.driver) {
2946		switch (index) {
2947		case 0:
2948			input = VINO_INPUT_D1;
2949			break;
2950		}
2951	}
2952	spin_unlock_irqrestore(&vino_drvdata->input_lock, flags);
2953
2954	return input;
2955}
2956
2957/* execute with input_lock locked */
2958static __u32 vino_find_input_index(struct vino_channel_settings *vcs)
2959{
2960	__u32 index = 0;
2961	// FIXME: detect when no inputs available
2962
2963	if (vino_drvdata->decoder.driver && vino_drvdata->camera.driver) {
2964		switch (vcs->input) {
2965		case VINO_INPUT_COMPOSITE:
2966			index = 0;
2967			break;
2968		case VINO_INPUT_SVIDEO:
2969			index = 1;
2970			break;
2971		case VINO_INPUT_D1:
2972			index = 2;
2973			break;
2974		}
2975	} else if (vino_drvdata->decoder.driver) {
2976		switch (vcs->input) {
2977		case VINO_INPUT_COMPOSITE:
2978			index = 0;
2979			break;
2980		case VINO_INPUT_SVIDEO:
2981			index = 1;
2982			break;
2983		}
2984	} else if (vino_drvdata->camera.driver) {
2985		switch (vcs->input) {
2986		case VINO_INPUT_D1:
2987			index = 0;
2988			break;
2989		}
2990	}
2991
2992	return index;
2993}
2994
2995/* V4L2 ioctls */
2996
2997static void vino_v4l2_querycap(struct v4l2_capability *cap)
2998{
2999	memset(cap, 0, sizeof(struct v4l2_capability));
3000
3001	strcpy(cap->driver, vino_driver_name);
3002	strcpy(cap->card, vino_driver_description);
3003	strcpy(cap->bus_info, vino_bus_name);
3004	cap->version = VINO_VERSION_CODE;
3005	cap->capabilities =
3006		V4L2_CAP_VIDEO_CAPTURE |
3007		V4L2_CAP_STREAMING;
3008	// V4L2_CAP_OVERLAY, V4L2_CAP_READWRITE
3009}
3010
3011static int vino_v4l2_enuminput(struct vino_channel_settings *vcs,
3012			       struct v4l2_input *i)
3013{
3014	__u32 index = i->index;
3015	int input;
3016	dprintk("requested index = %d\n", index);
3017
3018	input = vino_enum_input(vcs, index);
3019	if (input == VINO_INPUT_NONE)
3020		return -EINVAL;
3021
3022	memset(i, 0, sizeof(struct v4l2_input));
3023
3024	i->index = index;
3025	i->type = V4L2_INPUT_TYPE_CAMERA;
3026	i->std = vino_inputs[input].std;
3027	strcpy(i->name, vino_inputs[input].name);
3028
3029	if ((input == VINO_INPUT_COMPOSITE)
3030	    || (input == VINO_INPUT_SVIDEO)) {
3031		struct saa7191_status status;
3032		i2c_decoder_command(DECODER_SAA7191_GET_STATUS, &status);
3033		i->status |= status.signal ? 0 : V4L2_IN_ST_NO_SIGNAL;
3034		i->status |= status.color ? 0 : V4L2_IN_ST_NO_COLOR;
3035	}
3036
3037	return 0;
3038}
3039
3040static int vino_v4l2_g_input(struct vino_channel_settings *vcs,
3041			     unsigned int *i)
3042{
3043	__u32 index;
3044	int input;
3045	unsigned long flags;
3046
3047	spin_lock_irqsave(&vino_drvdata->input_lock, flags);
3048	input = vcs->input;
3049	index = vino_find_input_index(vcs);
3050	spin_unlock_irqrestore(&vino_drvdata->input_lock, flags);
3051
3052	dprintk("input = %d\n", input);
3053
3054	if (input == VINO_INPUT_NONE) {
3055		return -EINVAL;
3056	}
3057
3058	*i = index;
3059
3060	return 0;
3061}
3062
3063static int vino_v4l2_s_input(struct vino_channel_settings *vcs,
3064			     unsigned int *i)
3065{
3066	int input;
3067	dprintk("requested input = %d\n", *i);
3068
3069	input = vino_enum_input(vcs, *i);
3070	if (input == VINO_INPUT_NONE)
3071		return -EINVAL;
3072
3073	return vino_set_input(vcs, input);
3074}
3075
3076static int vino_v4l2_enumstd(struct vino_channel_settings *vcs,
3077			     struct v4l2_standard *s)
3078{
3079	int index = s->index;
3080	int data_norm;
3081
3082	data_norm = vino_enum_data_norm(vcs, index);
3083	dprintk("standard index = %d\n", index);
3084
3085	if (data_norm == VINO_DATA_NORM_NONE)
3086		return -EINVAL;
3087
3088	dprintk("standard name = %s\n",
3089	       vino_data_norms[data_norm].description);
3090
3091	memset(s, 0, sizeof(struct v4l2_standard));
3092	s->index = index;
3093
3094	s->id = vino_data_norms[data_norm].std;
3095	s->frameperiod.numerator = 1;
3096	s->frameperiod.denominator =
3097		vino_data_norms[data_norm].fps_max;
3098	s->framelines =
3099		vino_data_norms[data_norm].framelines;
3100	strcpy(s->name,
3101	       vino_data_norms[data_norm].description);
3102
3103	return 0;
3104}
3105
3106static int vino_v4l2_querystd(struct vino_channel_settings *vcs,
3107			      v4l2_std_id *std)
3108{
3109	unsigned long flags;
3110	int err = 0;
3111
3112	spin_lock_irqsave(&vino_drvdata->input_lock, flags);
3113
3114	switch (vcs->input) {
3115	case VINO_INPUT_D1:
3116		*std = vino_inputs[vcs->input].std;
3117		break;
3118	case VINO_INPUT_COMPOSITE:
3119	case VINO_INPUT_SVIDEO: {
3120		struct saa7191_status status;
3121
3122		i2c_decoder_command(DECODER_SAA7191_GET_STATUS, &status);
3123
3124		if (status.signal) {
3125			if (status.signal_60hz) {
3126				*std = V4L2_STD_NTSC;
3127			} else {
3128				*std = V4L2_STD_PAL | V4L2_STD_SECAM;
3129			}
3130		} else {
3131			*std = vino_inputs[vcs->input].std;
3132		}
3133		break;
3134	}
3135	default:
3136		err = -EINVAL;
3137	}
3138
3139	spin_unlock_irqrestore(&vino_drvdata->input_lock, flags);
3140
3141	return err;
3142}
3143
3144static int vino_v4l2_g_std(struct vino_channel_settings *vcs,
3145			   v4l2_std_id *std)
3146{
3147	unsigned long flags;
3148
3149	spin_lock_irqsave(&vino_drvdata->input_lock, flags);
3150
3151	*std = vino_data_norms[vcs->data_norm].std;
3152	dprintk("current standard = %d\n", vcs->data_norm);
3153
3154	spin_unlock_irqrestore(&vino_drvdata->input_lock, flags);
3155
3156	return 0;
3157}
3158
3159static int vino_v4l2_s_std(struct vino_channel_settings *vcs,
3160			   v4l2_std_id *std)
3161{
3162	unsigned long flags;
3163	int ret = 0;
3164
3165	spin_lock_irqsave(&vino_drvdata->input_lock, flags);
3166
3167	if (!vino_is_input_owner(vcs)) {
3168		ret = -EBUSY;
3169		goto out;
3170	}
3171
3172	/* check if the standard is valid for the current input */
3173	if ((*std) & vino_inputs[vcs->input].std) {
3174		dprintk("standard accepted\n");
3175
3176		/* change the video norm for SAA7191
3177		 * and accept NTSC for D1 (do nothing) */
3178
3179		if (vcs->input == VINO_INPUT_D1)
3180			goto out;
3181
3182		if (((*std) & V4L2_STD_PAL)
3183		    && ((*std) & V4L2_STD_NTSC)
3184		    && ((*std) & V4L2_STD_SECAM)) {
3185			ret = vino_set_data_norm(vcs, VINO_DATA_NORM_AUTO_EXT,
3186						 &flags);
3187		} else if ((*std) & V4L2_STD_PAL) {
3188			ret = vino_set_data_norm(vcs, VINO_DATA_NORM_PAL,
3189						 &flags);
3190		} else if ((*std) & V4L2_STD_NTSC) {
3191			ret = vino_set_data_norm(vcs, VINO_DATA_NORM_NTSC,
3192						 &flags);
3193		} else if ((*std) & V4L2_STD_SECAM) {
3194			ret = vino_set_data_norm(vcs, VINO_DATA_NORM_SECAM,
3195						 &flags);
3196		} else {
3197			ret = -EINVAL;
3198		}
3199
3200		if (ret) {
3201			ret = -EINVAL;
3202		}
3203	} else {
3204		ret = -EINVAL;
3205	}
3206
3207out:
3208	spin_unlock_irqrestore(&vino_drvdata->input_lock, flags);
3209
3210	return ret;
3211}
3212
3213static int vino_v4l2_enum_fmt(struct vino_channel_settings *vcs,
3214			      struct v4l2_fmtdesc *fd)
3215{
3216	enum v4l2_buf_type type = fd->type;
3217	int index = fd->index;
3218	dprintk("format index = %d\n", index);
3219
3220	switch (fd->type) {
3221	case V4L2_BUF_TYPE_VIDEO_CAPTURE:
3222		if ((fd->index < 0) ||
3223		    (fd->index >= VINO_DATA_FMT_COUNT))
3224			return -EINVAL;
3225		dprintk("format name = %s\n",
3226		       vino_data_formats[index].description);
3227
3228		memset(fd, 0, sizeof(struct v4l2_fmtdesc));
3229		fd->index = index;
3230		fd->type = type;
3231		fd->pixelformat = vino_data_formats[index].pixelformat;
3232		strcpy(fd->description, vino_data_formats[index].description);
3233		break;
3234	case V4L2_BUF_TYPE_VIDEO_OVERLAY:
3235	default:
3236		return -EINVAL;
3237	}
3238
3239	return 0;
3240}
3241
3242static int vino_v4l2_try_fmt(struct vino_channel_settings *vcs,
3243			     struct v4l2_format *f)
3244{
3245	struct vino_channel_settings tempvcs;
3246	unsigned long flags;
3247
3248	switch (f->type) {
3249	case V4L2_BUF_TYPE_VIDEO_CAPTURE: {
3250		struct v4l2_pix_format *pf = &f->fmt.pix;
3251
3252		dprintk("requested: w = %d, h = %d\n",
3253		       pf->width, pf->height);
3254
3255		spin_lock_irqsave(&vino_drvdata->input_lock, flags);
3256		memcpy(&tempvcs, vcs, sizeof(struct vino_channel_settings));
3257		spin_unlock_irqrestore(&vino_drvdata->input_lock, flags);
3258
3259		tempvcs.data_format = vino_find_data_format(pf->pixelformat);
3260		if (tempvcs.data_format == VINO_DATA_FMT_NONE) {
3261			tempvcs.data_format = VINO_DATA_FMT_GREY;
3262			pf->pixelformat =
3263				vino_data_formats[tempvcs.data_format].
3264				pixelformat;
3265		}
3266
3267		/* data format must be set before clipping/scaling */
3268		vino_set_scaling(&tempvcs, pf->width, pf->height);
3269
3270		dprintk("data format = %s\n",
3271		       vino_data_formats[tempvcs.data_format].description);
3272
3273		pf->width = (tempvcs.clipping.right - tempvcs.clipping.left) /
3274			tempvcs.decimation;
3275		pf->height = (tempvcs.clipping.bottom - tempvcs.clipping.top) /
3276			tempvcs.decimation;
3277
3278		pf->field = V4L2_FIELD_INTERLACED;
3279		pf->bytesperline = tempvcs.line_size;
3280		pf->sizeimage = tempvcs.line_size *
3281			(tempvcs.clipping.bottom - tempvcs.clipping.top) /
3282			tempvcs.decimation;
3283		pf->colorspace =
3284			vino_data_formats[tempvcs.data_format].colorspace;
3285
3286		pf->priv = 0;
3287		break;
3288	}
3289	case V4L2_BUF_TYPE_VIDEO_OVERLAY:
3290	default:
3291		return -EINVAL;
3292	}
3293
3294	return 0;
3295}
3296
3297static int vino_v4l2_g_fmt(struct vino_channel_settings *vcs,
3298			   struct v4l2_format *f)
3299{
3300	unsigned long flags;
3301
3302	switch (f->type) {
3303	case V4L2_BUF_TYPE_VIDEO_CAPTURE: {
3304		struct v4l2_pix_format *pf = &f->fmt.pix;
3305
3306		spin_lock_irqsave(&vino_drvdata->input_lock, flags);
3307
3308		pf->width = (vcs->clipping.right - vcs->clipping.left) /
3309			vcs->decimation;
3310		pf->height = (vcs->clipping.bottom - vcs->clipping.top) /
3311			vcs->decimation;
3312		pf->pixelformat =
3313			vino_data_formats[vcs->data_format].pixelformat;
3314
3315		pf->field = V4L2_FIELD_INTERLACED;
3316		pf->bytesperline = vcs->line_size;
3317		pf->sizeimage = vcs->line_size *
3318			(vcs->clipping.bottom - vcs->clipping.top) /
3319			vcs->decimation;
3320		pf->colorspace =
3321			vino_data_formats[vcs->data_format].colorspace;
3322
3323		pf->priv = 0;
3324
3325		spin_unlock_irqrestore(&vino_drvdata->input_lock, flags);
3326		break;
3327	}
3328	case V4L2_BUF_TYPE_VIDEO_OVERLAY:
3329	default:
3330		return -EINVAL;
3331	}
3332
3333	return 0;
3334}
3335
3336static int vino_v4l2_s_fmt(struct vino_channel_settings *vcs,
3337			   struct v4l2_format *f)
3338{
3339	int data_format;
3340	unsigned long flags;
3341
3342	switch (f->type) {
3343	case V4L2_BUF_TYPE_VIDEO_CAPTURE: {
3344		struct v4l2_pix_format *pf = &f->fmt.pix;
3345
3346		spin_lock_irqsave(&vino_drvdata->input_lock, flags);
3347
3348		data_format = vino_find_data_format(pf->pixelformat);
3349
3350		if (data_format == VINO_DATA_FMT_NONE) {
3351			vcs->data_format = VINO_DATA_FMT_GREY;
3352			pf->pixelformat =
3353				vino_data_formats[vcs->data_format].
3354				pixelformat;
3355		} else {
3356			vcs->data_format = data_format;
3357		}
3358
3359		/* data format must be set before clipping/scaling */
3360		vino_set_scaling(vcs, pf->width, pf->height);
3361
3362		dprintk("data format = %s\n",
3363		       vino_data_formats[vcs->data_format].description);
3364
3365		pf->width = vcs->clipping.right - vcs->clipping.left;
3366		pf->height = vcs->clipping.bottom - vcs->clipping.top;
3367
3368		pf->field = V4L2_FIELD_INTERLACED;
3369		pf->bytesperline = vcs->line_size;
3370		pf->sizeimage = vcs->line_size *
3371			(vcs->clipping.bottom - vcs->clipping.top) /
3372			vcs->decimation;
3373		pf->colorspace =
3374			vino_data_formats[vcs->data_format].colorspace;
3375
3376		pf->priv = 0;
3377
3378		spin_unlock_irqrestore(&vino_drvdata->input_lock, flags);
3379		break;
3380	}
3381	case V4L2_BUF_TYPE_VIDEO_OVERLAY:
3382	default:
3383		return -EINVAL;
3384	}
3385
3386	return 0;
3387}
3388
3389static int vino_v4l2_cropcap(struct vino_channel_settings *vcs,
3390			     struct v4l2_cropcap *ccap)
3391{
3392	const struct vino_data_norm *norm;
3393	unsigned long flags;
3394
3395	switch (ccap->type) {
3396	case V4L2_BUF_TYPE_VIDEO_CAPTURE:
3397		spin_lock_irqsave(&vino_drvdata->input_lock, flags);
3398
3399		norm = &vino_data_norms[vcs->data_norm];
3400
3401		spin_unlock_irqrestore(&vino_drvdata->input_lock, flags);
3402
3403		ccap->bounds.left = 0;
3404		ccap->bounds.top = 0;
3405		ccap->bounds.width = norm->width;
3406		ccap->bounds.height = norm->height;
3407		memcpy(&ccap->defrect, &ccap->bounds,
3408		       sizeof(struct v4l2_rect));
3409
3410		ccap->pixelaspect.numerator = 1;
3411		ccap->pixelaspect.denominator = 1;
3412		break;
3413	case V4L2_BUF_TYPE_VIDEO_OVERLAY:
3414	default:
3415		return -EINVAL;
3416	}
3417
3418	return 0;
3419}
3420
3421static int vino_v4l2_g_crop(struct vino_channel_settings *vcs,
3422			    struct v4l2_crop *c)
3423{
3424	unsigned long flags;
3425
3426	switch (c->type) {
3427	case V4L2_BUF_TYPE_VIDEO_CAPTURE:
3428		spin_lock_irqsave(&vino_drvdata->input_lock, flags);
3429
3430		c->c.left = vcs->clipping.left;
3431		c->c.top = vcs->clipping.top;
3432		c->c.width = vcs->clipping.right - vcs->clipping.left;
3433		c->c.height = vcs->clipping.bottom - vcs->clipping.top;
3434
3435		spin_unlock_irqrestore(&vino_drvdata->input_lock, flags);
3436		break;
3437	case V4L2_BUF_TYPE_VIDEO_OVERLAY:
3438	default:
3439		return -EINVAL;
3440	}
3441
3442	return 0;
3443}
3444
3445static int vino_v4l2_s_crop(struct vino_channel_settings *vcs,
3446			    struct v4l2_crop *c)
3447{
3448	unsigned long flags;
3449
3450	switch (c->type) {
3451	case V4L2_BUF_TYPE_VIDEO_CAPTURE:
3452		spin_lock_irqsave(&vino_drvdata->input_lock, flags);
3453
3454		vino_set_clipping(vcs, c->c.left, c->c.top,
3455				  c->c.width, c->c.height);
3456
3457		spin_unlock_irqrestore(&vino_drvdata->input_lock, flags);
3458		break;
3459	case V4L2_BUF_TYPE_VIDEO_OVERLAY:
3460	default:
3461		return -EINVAL;
3462	}
3463
3464	return 0;
3465}
3466
3467static int vino_v4l2_g_parm(struct vino_channel_settings *vcs,
3468			    struct v4l2_streamparm *sp)
3469{
3470	unsigned long flags;
3471
3472	switch (sp->type) {
3473	case V4L2_BUF_TYPE_VIDEO_CAPTURE: {
3474		struct v4l2_captureparm *cp = &sp->parm.capture;
3475		memset(cp, 0, sizeof(struct v4l2_captureparm));
3476
3477		cp->capability = V4L2_CAP_TIMEPERFRAME;
3478		cp->timeperframe.numerator = 1;
3479
3480		spin_lock_irqsave(&vino_drvdata->input_lock, flags);
3481
3482		cp->timeperframe.denominator = vcs->fps;
3483
3484		spin_unlock_irqrestore(&vino_drvdata->input_lock, flags);
3485
3486		// TODO: cp->readbuffers = xxx;
3487		break;
3488	}
3489	case V4L2_BUF_TYPE_VIDEO_OVERLAY:
3490	default:
3491		return -EINVAL;
3492	}
3493
3494	return 0;
3495}
3496
3497static int vino_v4l2_s_parm(struct vino_channel_settings *vcs,
3498			    struct v4l2_streamparm *sp)
3499{
3500	unsigned long flags;
3501
3502	switch (sp->type) {
3503	case V4L2_BUF_TYPE_VIDEO_CAPTURE: {
3504		struct v4l2_captureparm *cp = &sp->parm.capture;
3505
3506		spin_lock_irqsave(&vino_drvdata->input_lock, flags);
3507
3508		if ((cp->timeperframe.numerator == 0) ||
3509		    (cp->timeperframe.denominator == 0)) {
3510			/* reset framerate */
3511			vino_set_default_framerate(vcs);
3512		} else {
3513			vino_set_framerate(vcs, cp->timeperframe.denominator /
3514					   cp->timeperframe.numerator);
3515		}
3516
3517		spin_unlock_irqrestore(&vino_drvdata->input_lock, flags);
3518
3519		// TODO: set buffers according to cp->readbuffers
3520		break;
3521	}
3522	case V4L2_BUF_TYPE_VIDEO_OVERLAY:
3523	default:
3524		return -EINVAL;
3525	}
3526
3527	return 0;
3528}
3529
3530static int vino_v4l2_reqbufs(struct vino_channel_settings *vcs,
3531			     struct v4l2_requestbuffers *rb)
3532{
3533	if (vcs->reading)
3534		return -EBUSY;
3535
3536	switch (rb->type) {
3537	case V4L2_BUF_TYPE_VIDEO_CAPTURE: {
3538		// TODO: check queue type
3539		if (rb->memory != V4L2_MEMORY_MMAP) {
3540			dprintk("type not mmap\n");
3541			return -EINVAL;
3542		}
3543
3544		dprintk("count = %d\n", rb->count);
3545		if (rb->count > 0) {
3546			if (vino_is_capturing(vcs)) {
3547				dprintk("busy, capturing\n");
3548				return -EBUSY;
3549			}
3550
3551			if (vino_queue_has_mapped_buffers(&vcs->fb_queue)) {
3552				dprintk("busy, buffers still mapped\n");
3553				return -EBUSY;
3554			} else {
3555				vcs->streaming = 0;
3556				vino_queue_free(&vcs->fb_queue);
3557				vino_queue_init(&vcs->fb_queue, &rb->count);
3558			}
3559		} else {
3560			vcs->streaming = 0;
3561			vino_capture_stop(vcs);
3562			vino_queue_free(&vcs->fb_queue);
3563		}
3564		break;
3565	}
3566	case V4L2_BUF_TYPE_VIDEO_OVERLAY:
3567	default:
3568		return -EINVAL;
3569	}
3570
3571	return 0;
3572}
3573
3574static void vino_v4l2_get_buffer_status(struct vino_channel_settings *vcs,
3575					struct vino_framebuffer *fb,
3576					struct v4l2_buffer *b)
3577{
3578	if (vino_queue_outgoing_contains(&vcs->fb_queue,
3579					 fb->id)) {
3580		b->flags &= ~V4L2_BUF_FLAG_QUEUED;
3581		b->flags |= V4L2_BUF_FLAG_DONE;
3582	} else if (vino_queue_incoming_contains(&vcs->fb_queue,
3583				       fb->id)) {
3584		b->flags &= ~V4L2_BUF_FLAG_DONE;
3585		b->flags |= V4L2_BUF_FLAG_QUEUED;
3586	} else {
3587		b->flags &= ~(V4L2_BUF_FLAG_DONE |
3588			      V4L2_BUF_FLAG_QUEUED);
3589	}
3590
3591	b->flags &= ~(V4L2_BUF_FLAG_TIMECODE);
3592
3593	if (fb->map_count > 0)
3594		b->flags |= V4L2_BUF_FLAG_MAPPED;
3595
3596	b->index = fb->id;
3597	b->memory = (vcs->fb_queue.type == VINO_MEMORY_MMAP) ?
3598		V4L2_MEMORY_MMAP : V4L2_MEMORY_USERPTR;
3599	b->m.offset = fb->offset;
3600	b->bytesused = fb->data_size;
3601	b->length = fb->size;
3602	b->field = V4L2_FIELD_INTERLACED;
3603	b->sequence = fb->frame_counter;
3604	memcpy(&b->timestamp, &fb->timestamp,
3605	       sizeof(struct timeval));
3606	// b->input ?
3607
3608	dprintk("buffer %d: length = %d, bytesused = %d, offset = %d\n",
3609		fb->id, fb->size, fb->data_size, fb->offset);
3610}
3611
3612static int vino_v4l2_querybuf(struct vino_channel_settings *vcs,
3613			      struct v4l2_buffer *b)
3614{
3615	if (vcs->reading)
3616		return -EBUSY;
3617
3618	switch (b->type) {
3619	case V4L2_BUF_TYPE_VIDEO_CAPTURE: {
3620		struct vino_framebuffer *fb;
3621
3622		// TODO: check queue type
3623		if (b->index >= vino_queue_get_length(&vcs->fb_queue)) {
3624			dprintk("invalid index = %d\n",
3625			       b->index);
3626			return -EINVAL;
3627		}
3628
3629		fb = vino_queue_get_buffer(&vcs->fb_queue,
3630					   b->index);
3631		if (fb == NULL) {
3632			dprintk("vino_queue_get_buffer() failed");
3633			return -EINVAL;
3634		}
3635
3636		vino_v4l2_get_buffer_status(vcs, fb, b);
3637		break;
3638	}
3639	case V4L2_BUF_TYPE_VIDEO_OVERLAY:
3640	default:
3641		return -EINVAL;
3642	}
3643
3644	return 0;
3645}
3646
3647static int vino_v4l2_qbuf(struct vino_channel_settings *vcs,
3648			  struct v4l2_buffer *b)
3649{
3650	if (vcs->reading)
3651		return -EBUSY;
3652
3653	switch (b->type) {
3654	case V4L2_BUF_TYPE_VIDEO_CAPTURE: {
3655		struct vino_framebuffer *fb;
3656		int ret;
3657
3658		// TODO: check queue type
3659		if (b->memory != V4L2_MEMORY_MMAP) {
3660			dprintk("type not mmap\n");
3661			return -EINVAL;
3662		}
3663
3664		fb = vino_capture_enqueue(vcs, b->index);
3665		if (fb == NULL)
3666			return -EINVAL;
3667
3668		vino_v4l2_get_buffer_status(vcs, fb, b);
3669
3670		if (vcs->streaming) {
3671			ret = vino_capture_next(vcs, 1);
3672			if (ret)
3673				return ret;
3674		}
3675		break;
3676	}
3677	case V4L2_BUF_TYPE_VIDEO_OVERLAY:
3678	default:
3679		return -EINVAL;
3680	}
3681
3682	return 0;
3683}
3684
3685static int vino_v4l2_dqbuf(struct vino_channel_settings *vcs,
3686			   struct v4l2_buffer *b,
3687			   unsigned int nonblocking)
3688{
3689	if (vcs->reading)
3690		return -EBUSY;
3691
3692	switch (b->type) {
3693	case V4L2_BUF_TYPE_VIDEO_CAPTURE: {
3694		struct vino_framebuffer *fb;
3695		unsigned int incoming, outgoing;
3696		int err;
3697
3698		// TODO: check queue type
3699
3700		err = vino_queue_get_incoming(&vcs->fb_queue, &incoming);
3701		if (err) {
3702			dprintk("vino_queue_get_incoming() failed\n");
3703			return -EINVAL;
3704		}
3705		err = vino_queue_get_outgoing(&vcs->fb_queue, &outgoing);
3706		if (err) {
3707			dprintk("vino_queue_get_outgoing() failed\n");
3708			return -EINVAL;
3709		}
3710
3711		dprintk("incoming = %d, outgoing = %d\n", incoming, outgoing);
3712
3713		if (outgoing == 0) {
3714			if (incoming == 0) {
3715				dprintk("no incoming or outgoing buffers\n");
3716				return -EINVAL;
3717			}
3718			if (nonblocking) {
3719				dprintk("non-blocking I/O was selected and "
3720					"there are no buffers to dequeue\n");
3721				return -EAGAIN;
3722			}
3723
3724			err = vino_wait_for_frame(vcs);
3725			if (err) {
3726				err = vino_wait_for_frame(vcs);
3727				if (err) {
3728					/* interrupted or
3729					 * no frames captured because
3730					 * of frame skipping */
3731					// vino_capture_failed(vcs);
3732					return -EIO;
3733				}
3734			}
3735		}
3736
3737		fb = vino_queue_remove(&vcs->fb_queue, &b->index);
3738		if (fb == NULL) {
3739			dprintk("vino_queue_remove() failed\n");
3740			return -EINVAL;
3741		}
3742
3743		err = vino_check_buffer(vcs, fb);
3744
3745		vino_v4l2_get_buffer_status(vcs, fb, b);
3746
3747		if (err)
3748			return -EIO;
3749
3750		break;
3751	}
3752	case V4L2_BUF_TYPE_VIDEO_OVERLAY:
3753	default:
3754		return -EINVAL;
3755	}
3756
3757	return 0;
3758}
3759
3760static int vino_v4l2_streamon(struct vino_channel_settings *vcs)
3761{
3762	unsigned int incoming;
3763	int ret;
3764	if (vcs->reading)
3765		return -EBUSY;
3766
3767	if (vcs->streaming)
3768		return 0;
3769
3770	// TODO: check queue type
3771
3772	if (vino_queue_get_length(&vcs->fb_queue) < 1) {
3773		dprintk("no buffers allocated\n");
3774		return -EINVAL;
3775	}
3776
3777	ret = vino_queue_get_incoming(&vcs->fb_queue, &incoming);
3778	if (ret) {
3779		dprintk("vino_queue_get_incoming() failed\n");
3780		return -EINVAL;
3781	}
3782
3783	vcs->streaming = 1;
3784
3785	if (incoming > 0) {
3786		ret = vino_capture_next(vcs, 1);
3787		if (ret) {
3788			vcs->streaming = 0;
3789
3790			dprintk("couldn't start capture\n");
3791			return -EINVAL;
3792		}
3793	}
3794
3795	return 0;
3796}
3797
3798static int vino_v4l2_streamoff(struct vino_channel_settings *vcs)
3799{
3800	if (vcs->reading)
3801		return -EBUSY;
3802
3803	if (!vcs->streaming)
3804		return 0;
3805
3806	vcs->streaming = 0;
3807	vino_capture_stop(vcs);
3808
3809	return 0;
3810}
3811
3812static int vino_v4l2_queryctrl(struct vino_channel_settings *vcs,
3813			       struct v4l2_queryctrl *queryctrl)
3814{
3815	unsigned long flags;
3816	int i;
3817	int err = 0;
3818
3819	spin_lock_irqsave(&vino_drvdata->input_lock, flags);
3820
3821	switch (vcs->input) {
3822	case VINO_INPUT_D1:
3823		for (i = 0; i < VINO_INDYCAM_V4L2_CONTROL_COUNT; i++) {
3824			if (vino_indycam_v4l2_controls[i].id ==
3825			    queryctrl->id) {
3826				memcpy(queryctrl,
3827				       &vino_indycam_v4l2_controls[i],
3828				       sizeof(struct v4l2_queryctrl));
3829				queryctrl->reserved[0] = 0;
3830				goto found;
3831			}
3832		}
3833
3834		err =  -EINVAL;
3835		break;
3836	case VINO_INPUT_COMPOSITE:
3837	case VINO_INPUT_SVIDEO:
3838		for (i = 0; i < VINO_SAA7191_V4L2_CONTROL_COUNT; i++) {
3839			if (vino_saa7191_v4l2_controls[i].id ==
3840			    queryctrl->id) {
3841				memcpy(queryctrl,
3842				       &vino_saa7191_v4l2_controls[i],
3843				       sizeof(struct v4l2_queryctrl));
3844				queryctrl->reserved[0] = 0;
3845				goto found;
3846			}
3847		}
3848
3849		err =  -EINVAL;
3850		break;
3851	default:
3852		err =  -EINVAL;
3853	}
3854
3855 found:
3856	spin_unlock_irqrestore(&vino_drvdata->input_lock, flags);
3857
3858	return err;
3859}
3860
3861static int vino_v4l2_g_ctrl(struct vino_channel_settings *vcs,
3862			    struct v4l2_control *control)
3863{
3864	unsigned long flags;
3865	int i;
3866	int err = 0;
3867
3868	spin_lock_irqsave(&vino_drvdata->input_lock, flags);
3869
3870	switch (vcs->input) {
3871	case VINO_INPUT_D1: {
3872		struct indycam_control indycam_ctrl;
3873
3874		for (i = 0; i < VINO_INDYCAM_V4L2_CONTROL_COUNT; i++) {
3875			if (vino_indycam_v4l2_controls[i].id ==
3876			    control->id) {
3877				goto found1;
3878			}
3879		}
3880
3881		err = -EINVAL;
3882		goto out;
3883
3884found1:
3885		indycam_ctrl.type = vino_indycam_v4l2_controls[i].reserved[0];
3886
3887		err = i2c_camera_command(DECODER_INDYCAM_GET_CONTROL,
3888					 &indycam_ctrl);
3889		if (err) {
3890			err = -EINVAL;
3891			goto out;
3892		}
3893
3894		control->value = indycam_ctrl.value;
3895		break;
3896	}
3897	case VINO_INPUT_COMPOSITE:
3898	case VINO_INPUT_SVIDEO: {
3899		struct saa7191_control saa7191_ctrl;
3900
3901		for (i = 0; i < VINO_SAA7191_V4L2_CONTROL_COUNT; i++) {
3902			if (vino_saa7191_v4l2_controls[i].id ==
3903			    control->id) {
3904				goto found2;
3905			}
3906		}
3907
3908		err = -EINVAL;
3909		goto out;
3910
3911found2:
3912		saa7191_ctrl.type = vino_saa7191_v4l2_controls[i].reserved[0];
3913
3914		err = i2c_decoder_command(DECODER_SAA7191_GET_CONTROL,
3915					  &saa7191_ctrl);
3916		if (err) {
3917			err = -EINVAL;
3918			goto out;
3919		}
3920
3921		control->value = saa7191_ctrl.value;
3922		break;
3923	}
3924	default:
3925		err =  -EINVAL;
3926	}
3927
3928out:
3929	spin_unlock_irqrestore(&vino_drvdata->input_lock, flags);
3930
3931	return err;
3932}
3933
3934static int vino_v4l2_s_ctrl(struct vino_channel_settings *vcs,
3935			    struct v4l2_control *control)
3936{
3937	unsigned long flags;
3938	int i;
3939	int err = 0;
3940
3941	spin_lock_irqsave(&vino_drvdata->input_lock, flags);
3942
3943	if (!vino_is_input_owner(vcs)) {
3944		err = -EBUSY;
3945		goto out;
3946	}
3947
3948	switch (vcs->input) {
3949	case VINO_INPUT_D1: {
3950		struct indycam_control indycam_ctrl;
3951
3952		for (i = 0; i < VINO_INDYCAM_V4L2_CONTROL_COUNT; i++) {
3953			if (vino_indycam_v4l2_controls[i].id ==
3954			    control->id) {
3955				if ((control->value >=
3956				     vino_indycam_v4l2_controls[i].minimum)
3957				    && (control->value <=
3958					vino_indycam_v4l2_controls[i].
3959					maximum)) {
3960					goto found1;
3961				} else {
3962					err = -ERANGE;
3963					goto out;
3964				}
3965			}
3966		}
3967
3968		err = -EINVAL;
3969		goto out;
3970
3971found1:
3972		indycam_ctrl.type = vino_indycam_v4l2_controls[i].reserved[0];
3973		indycam_ctrl.value = control->value;
3974
3975		err = i2c_camera_command(DECODER_INDYCAM_SET_CONTROL,
3976					 &indycam_ctrl);
3977		if (err)
3978			err = -EINVAL;
3979		break;
3980	}
3981	case VINO_INPUT_COMPOSITE:
3982	case VINO_INPUT_SVIDEO: {
3983		struct saa7191_control saa7191_ctrl;
3984
3985		for (i = 0; i < VINO_SAA7191_V4L2_CONTROL_COUNT; i++) {
3986			if (vino_saa7191_v4l2_controls[i].id ==
3987			    control->id) {
3988				if ((control->value >=
3989				     vino_saa7191_v4l2_controls[i].minimum)
3990				    && (control->value <=
3991					vino_saa7191_v4l2_controls[i].
3992					maximum)) {
3993					goto found2;
3994				} else {
3995					err = -ERANGE;
3996					goto out;
3997				}
3998			}
3999		}
4000		err = -EINVAL;
4001		goto out;
4002
4003found2:
4004		saa7191_ctrl.type = vino_saa7191_v4l2_controls[i].reserved[0];
4005		saa7191_ctrl.value = control->value;
4006
4007		err = i2c_decoder_command(DECODER_SAA7191_SET_CONTROL,
4008					  &saa7191_ctrl);
4009		if (err)
4010			err = -EINVAL;
4011		break;
4012	}
4013	default:
4014		err =  -EINVAL;
4015	}
4016
4017out:
4018	spin_unlock_irqrestore(&vino_drvdata->input_lock, flags);
4019
4020	return err;
4021}
4022
4023/* File operations */
4024
4025static int vino_open(struct inode *inode, struct file *file)
4026{
4027	struct video_device *dev = video_devdata(file);
4028	struct vino_channel_settings *vcs = video_get_drvdata(dev);
4029	int ret = 0;
4030	dprintk("open(): channel = %c\n",
4031	       (vcs->channel == VINO_CHANNEL_A) ? 'A' : 'B');
4032
4033	mutex_lock(&vcs->mutex);
4034
4035	if (vcs->users) {
4036		dprintk("open(): driver busy\n");
4037		ret = -EBUSY;
4038		goto out;
4039	}
4040
4041	ret = vino_acquire_input(vcs);
4042	if (ret) {
4043		dprintk("open(): vino_acquire_input() failed\n");
4044		goto out;
4045	}
4046
4047	vcs->users++;
4048
4049 out:
4050	mutex_unlock(&vcs->mutex);
4051
4052	dprintk("open(): %s!\n", ret ? "failed" : "complete");
4053
4054	return ret;
4055}
4056
4057static int vino_close(struct inode *inode, struct file *file)
4058{
4059	struct video_device *dev = video_devdata(file);
4060	struct vino_channel_settings *vcs = video_get_drvdata(dev);
4061	dprintk("close():\n");
4062
4063	mutex_lock(&vcs->mutex);
4064
4065	vcs->users--;
4066
4067	if (!vcs->users) {
4068		vino_release_input(vcs);
4069
4070		/* stop DMA and free buffers */
4071		vino_capture_stop(vcs);
4072		vino_queue_free(&vcs->fb_queue);
4073	}
4074
4075	mutex_unlock(&vcs->mutex);
4076
4077	return 0;
4078}
4079
4080static void vino_vm_open(struct vm_area_struct *vma)
4081{
4082	struct vino_framebuffer *fb = vma->vm_private_data;
4083
4084	fb->map_count++;
4085	dprintk("vino_vm_open(): count = %d\n", fb->map_count);
4086}
4087
4088static void vino_vm_close(struct vm_area_struct *vma)
4089{
4090	struct vino_framebuffer *fb = vma->vm_private_data;
4091
4092	fb->map_count--;
4093	dprintk("vino_vm_close(): count = %d\n", fb->map_count);
4094}
4095
4096static struct vm_operations_struct vino_vm_ops = {
4097	.open	= vino_vm_open,
4098	.close	= vino_vm_close,
4099};
4100
4101static int vino_mmap(struct file *file, struct vm_area_struct *vma)
4102{
4103	struct video_device *dev = video_devdata(file);
4104	struct vino_channel_settings *vcs = video_get_drvdata(dev);
4105
4106	unsigned long start = vma->vm_start;
4107	unsigned long size = vma->vm_end - vma->vm_start;
4108	unsigned long offset = vma->vm_pgoff << PAGE_SHIFT;
4109
4110	struct vino_framebuffer *fb = NULL;
4111	unsigned int i, length;
4112	int ret = 0;
4113
4114	dprintk("mmap():\n");
4115
4116	// TODO: reject mmap if already mapped
4117
4118	if (mutex_lock_interruptible(&vcs->mutex))
4119		return -EINTR;
4120
4121	if (vcs->reading) {
4122		ret = -EBUSY;
4123		goto out;
4124	}
4125
4126	// TODO: check queue type
4127
4128	if (!(vma->vm_flags & VM_WRITE)) {
4129		dprintk("mmap(): app bug: PROT_WRITE please\n");
4130		ret = -EINVAL;
4131		goto out;
4132	}
4133	if (!(vma->vm_flags & VM_SHARED)) {
4134		dprintk("mmap(): app bug: MAP_SHARED please\n");
4135		ret = -EINVAL;
4136		goto out;
4137	}
4138
4139	/* find the correct buffer using offset */
4140	length = vino_queue_get_length(&vcs->fb_queue);
4141	if (length == 0) {
4142		dprintk("mmap(): queue not initialized\n");
4143		ret = -EINVAL;
4144		goto out;
4145	}
4146
4147	for (i = 0; i < length; i++) {
4148		fb = vino_queue_get_buffer(&vcs->fb_queue, i);
4149		if (fb == NULL) {
4150			dprintk("mmap(): vino_queue_get_buffer() failed\n");
4151			ret = -EINVAL;
4152			goto out;
4153		}
4154
4155		if (fb->offset == offset)
4156			goto found;
4157	}
4158
4159	dprintk("mmap(): invalid offset = %lu\n", offset);
4160	ret = -EINVAL;
4161	goto out;
4162
4163found:
4164	dprintk("mmap(): buffer = %d\n", i);
4165
4166	if (size > (fb->desc_table.page_count * PAGE_SIZE)) {
4167		dprintk("mmap(): failed: size = %lu > %lu\n",
4168			size, fb->desc_table.page_count * PAGE_SIZE);
4169		ret = -EINVAL;
4170		goto out;
4171	}
4172
4173	for (i = 0; i < fb->desc_table.page_count; i++) {
4174		unsigned long pfn =
4175			virt_to_phys((void *)fb->desc_table.virtual[i]) >>
4176			PAGE_SHIFT;
4177
4178		if (size < PAGE_SIZE)
4179			break;
4180
4181		// protection was: PAGE_READONLY
4182		if (remap_pfn_range(vma, start, pfn, PAGE_SIZE,
4183				    vma->vm_page_prot)) {
4184			dprintk("mmap(): remap_pfn_range() failed\n");
4185			ret = -EAGAIN;
4186			goto out;
4187		}
4188
4189		start += PAGE_SIZE;
4190		size -= PAGE_SIZE;
4191	}
4192
4193	fb->map_count = 1;
4194
4195	vma->vm_flags |= VM_DONTEXPAND | VM_RESERVED;
4196	vma->vm_flags &= ~VM_IO;
4197	vma->vm_private_data = fb;
4198	vma->vm_file = file;
4199	vma->vm_ops = &vino_vm_ops;
4200
4201out:
4202	mutex_unlock(&vcs->mutex);
4203
4204	return ret;
4205}
4206
4207static unsigned int vino_poll(struct file *file, poll_table *pt)
4208{
4209	struct video_device *dev = video_devdata(file);
4210	struct vino_channel_settings *vcs = video_get_drvdata(dev);
4211	unsigned int outgoing;
4212	unsigned int ret = 0;
4213
4214	// lock mutex (?)
4215	// TODO: this has to be corrected for different read modes
4216
4217	dprintk("poll():\n");
4218
4219	if (vino_queue_get_outgoing(&vcs->fb_queue, &outgoing)) {
4220		dprintk("poll(): vino_queue_get_outgoing() failed\n");
4221		ret = POLLERR;
4222		goto error;
4223	}
4224	if (outgoing > 0)
4225		goto over;
4226
4227	poll_wait(file, &vcs->fb_queue.frame_wait_queue, pt);
4228
4229	if (vino_queue_get_outgoing(&vcs->fb_queue, &outgoing)) {
4230		dprintk("poll(): vino_queue_get_outgoing() failed\n");
4231		ret = POLLERR;
4232		goto error;
4233	}
4234
4235over:
4236	dprintk("poll(): data %savailable\n",
4237		(outgoing > 0) ? "" : "not ");
4238
4239	if (outgoing > 0)
4240		ret = POLLIN | POLLRDNORM;
4241
4242error:
4243
4244	return ret;
4245}
4246
4247static int vino_do_ioctl(struct inode *inode, struct file *file,
4248		      unsigned int cmd, void *arg)
4249{
4250	struct video_device *dev = video_devdata(file);
4251	struct vino_channel_settings *vcs = video_get_drvdata(dev);
4252
4253#ifdef VINO_DEBUG
4254	switch (_IOC_TYPE(cmd)) {
4255	case 'v':
4256		dprintk("ioctl(): V4L1 unsupported (0x%08x)\n", cmd);
4257		break;
4258	case 'V':
4259		dprintk("ioctl(): V4L2 %s (0x%08x)\n",
4260			v4l2_ioctl_names[_IOC_NR(cmd)], cmd);
4261		break;
4262	default:
4263		dprintk("ioctl(): unsupported command 0x%08x\n", cmd);
4264	}
4265#endif
4266
4267	switch (cmd) {
4268	/* V4L2 interface */
4269	case VIDIOC_QUERYCAP: {
4270		vino_v4l2_querycap(arg);
4271		break;
4272	}
4273	case VIDIOC_ENUMINPUT: {
4274		return vino_v4l2_enuminput(vcs, arg);
4275	}
4276	case VIDIOC_G_INPUT: {
4277		return vino_v4l2_g_input(vcs, arg);
4278	}
4279	case VIDIOC_S_INPUT: {
4280		return vino_v4l2_s_input(vcs, arg);
4281	}
4282	case VIDIOC_ENUMSTD: {
4283		return vino_v4l2_enumstd(vcs, arg);
4284	}
4285	case VIDIOC_QUERYSTD: {
4286		return vino_v4l2_querystd(vcs, arg);
4287	}
4288	case VIDIOC_G_STD: {
4289		return vino_v4l2_g_std(vcs, arg);
4290	}
4291	case VIDIOC_S_STD: {
4292		return vino_v4l2_s_std(vcs, arg);
4293	}
4294	case VIDIOC_ENUM_FMT: {
4295		return vino_v4l2_enum_fmt(vcs, arg);
4296	}
4297	case VIDIOC_TRY_FMT: {
4298		return vino_v4l2_try_fmt(vcs, arg);
4299	}
4300	case VIDIOC_G_FMT: {
4301		return vino_v4l2_g_fmt(vcs, arg);
4302	}
4303	case VIDIOC_S_FMT: {
4304		return vino_v4l2_s_fmt(vcs, arg);
4305	}
4306	case VIDIOC_CROPCAP: {
4307		return vino_v4l2_cropcap(vcs, arg);
4308	}
4309	case VIDIOC_G_CROP: {
4310		return vino_v4l2_g_crop(vcs, arg);
4311	}
4312	case VIDIOC_S_CROP: {
4313		return vino_v4l2_s_crop(vcs, arg);
4314	}
4315	case VIDIOC_G_PARM: {
4316		return vino_v4l2_g_parm(vcs, arg);
4317	}
4318	case VIDIOC_S_PARM: {
4319		return vino_v4l2_s_parm(vcs, arg);
4320	}
4321	case VIDIOC_REQBUFS: {
4322		return vino_v4l2_reqbufs(vcs, arg);
4323	}
4324	case VIDIOC_QUERYBUF: {
4325		return vino_v4l2_querybuf(vcs, arg);
4326	}
4327	case VIDIOC_QBUF: {
4328		return vino_v4l2_qbuf(vcs, arg);
4329	}
4330	case VIDIOC_DQBUF: {
4331		return vino_v4l2_dqbuf(vcs, arg, file->f_flags & O_NONBLOCK);
4332	}
4333	case VIDIOC_STREAMON: {
4334		return vino_v4l2_streamon(vcs);
4335	}
4336	case VIDIOC_STREAMOFF: {
4337		return vino_v4l2_streamoff(vcs);
4338	}
4339	case VIDIOC_QUERYCTRL: {
4340		return vino_v4l2_queryctrl(vcs, arg);
4341	}
4342	case VIDIOC_G_CTRL: {
4343		return vino_v4l2_g_ctrl(vcs, arg);
4344	}
4345	case VIDIOC_S_CTRL: {
4346		return vino_v4l2_s_ctrl(vcs, arg);
4347	}
4348	default:
4349		return -ENOIOCTLCMD;
4350	}
4351
4352	return 0;
4353}
4354
4355static int vino_ioctl(struct inode *inode, struct file *file,
4356		      unsigned int cmd, unsigned long arg)
4357{
4358	struct video_device *dev = video_devdata(file);
4359	struct vino_channel_settings *vcs = video_get_drvdata(dev);
4360	int ret;
4361
4362	if (mutex_lock_interruptible(&vcs->mutex))
4363		return -EINTR;
4364
4365	ret = video_usercopy(inode, file, cmd, arg, vino_do_ioctl);
4366
4367	mutex_unlock(&vcs->mutex);
4368
4369	return ret;
4370}
4371
4372/* Initialization and cleanup */
4373
4374/* __initdata */
4375static int vino_init_stage;
4376
4377static const struct file_operations vino_fops = {
4378	.owner		= THIS_MODULE,
4379	.open		= vino_open,
4380	.release	= vino_close,
4381	.ioctl		= vino_ioctl,
4382	.mmap		= vino_mmap,
4383	.poll		= vino_poll,
4384	.llseek		= no_llseek,
4385};
4386
4387static struct video_device v4l_device_template = {
4388	.name		= "NOT SET",
4389	.fops		= &vino_fops,
4390	.minor		= -1,
4391};
4392
4393static void vino_module_cleanup(int stage)
4394{
4395	switch(stage) {
4396	case 10:
4397		video_unregister_device(vino_drvdata->b.v4l_device);
4398		vino_drvdata->b.v4l_device = NULL;
4399	case 9:
4400		video_unregister_device(vino_drvdata->a.v4l_device);
4401		vino_drvdata->a.v4l_device = NULL;
4402	case 8:
4403		vino_i2c_del_bus();
4404	case 7:
4405		free_irq(SGI_VINO_IRQ, NULL);
4406	case 6:
4407		if (vino_drvdata->b.v4l_device) {
4408			video_device_release(vino_drvdata->b.v4l_device);
4409			vino_drvdata->b.v4l_device = NULL;
4410		}
4411	case 5:
4412		if (vino_drvdata->a.v4l_device) {
4413			video_device_release(vino_drvdata->a.v4l_device);
4414			vino_drvdata->a.v4l_device = NULL;
4415		}
4416	case 4:
4417		/* all entries in dma_cpu dummy table have the same address */
4418		dma_unmap_single(NULL,
4419				 vino_drvdata->dummy_desc_table.dma_cpu[0],
4420				 PAGE_SIZE, DMA_FROM_DEVICE);
4421		dma_free_coherent(NULL, VINO_DUMMY_DESC_COUNT
4422				  * sizeof(dma_addr_t),
4423				  (void *)vino_drvdata->
4424				  dummy_desc_table.dma_cpu,
4425				  vino_drvdata->dummy_desc_table.dma);
4426	case 3:
4427		free_page(vino_drvdata->dummy_page);
4428	case 2:
4429		kfree(vino_drvdata);
4430	case 1:
4431		iounmap(vino);
4432	case 0:
4433		break;
4434	default:
4435		dprintk("vino_module_cleanup(): invalid cleanup stage = %d\n",
4436			stage);
4437	}
4438}
4439
4440static int vino_probe(void)
4441{
4442	unsigned long rev_id;
4443
4444	if (ip22_is_fullhouse()) {
4445		printk(KERN_ERR "VINO doesn't exist in IP22 Fullhouse\n");
4446		return -ENODEV;
4447	}
4448
4449	if (!(sgimc->systemid & SGIMC_SYSID_EPRESENT)) {
4450		printk(KERN_ERR "VINO is not found (EISA BUS not present)\n");
4451		return -ENODEV;
4452	}
4453
4454	vino = (struct sgi_vino *)ioremap(VINO_BASE, sizeof(struct sgi_vino));
4455	if (!vino) {
4456		printk(KERN_ERR "VINO: ioremap() failed\n");
4457		return -EIO;
4458	}
4459	vino_init_stage++;
4460
4461	if (get_dbe(rev_id, &(vino->rev_id))) {
4462		printk(KERN_ERR "Failed to read VINO revision register\n");
4463		vino_module_cleanup(vino_init_stage);
4464		return -ENODEV;
4465	}
4466
4467	if (VINO_ID_VALUE(rev_id) != VINO_CHIP_ID) {
4468		printk(KERN_ERR "Unknown VINO chip ID (Rev/ID: 0x%02lx)\n",
4469		       rev_id);
4470		vino_module_cleanup(vino_init_stage);
4471		return -ENODEV;
4472	}
4473
4474	printk(KERN_INFO "VINO revision %ld found\n", VINO_REV_NUM(rev_id));
4475
4476	return 0;
4477}
4478
4479static int vino_init(void)
4480{
4481	dma_addr_t dma_dummy_address;
4482	int i;
4483
4484	vino_drvdata = kzalloc(sizeof(struct vino_settings), GFP_KERNEL);
4485	if (!vino_drvdata) {
4486		vino_module_cleanup(vino_init_stage);
4487		return -ENOMEM;
4488	}
4489	vino_init_stage++;
4490
4491	/* create a dummy dma descriptor */
4492	vino_drvdata->dummy_page = get_zeroed_page(GFP_KERNEL | GFP_DMA);
4493	if (!vino_drvdata->dummy_page) {
4494		vino_module_cleanup(vino_init_stage);
4495		return -ENOMEM;
4496	}
4497	vino_init_stage++;
4498
4499	// TODO: use page_count in dummy_desc_table
4500
4501	vino_drvdata->dummy_desc_table.dma_cpu =
4502		dma_alloc_coherent(NULL,
4503		VINO_DUMMY_DESC_COUNT * sizeof(dma_addr_t),
4504		&vino_drvdata->dummy_desc_table.dma,
4505		GFP_KERNEL | GFP_DMA);
4506	if (!vino_drvdata->dummy_desc_table.dma_cpu) {
4507		vino_module_cleanup(vino_init_stage);
4508		return -ENOMEM;
4509	}
4510	vino_init_stage++;
4511
4512	dma_dummy_address = dma_map_single(NULL,
4513					   (void *)vino_drvdata->dummy_page,
4514					PAGE_SIZE, DMA_FROM_DEVICE);
4515	for (i = 0; i < VINO_DUMMY_DESC_COUNT; i++) {
4516		vino_drvdata->dummy_desc_table.dma_cpu[i] = dma_dummy_address;
4517	}
4518
4519	/* initialize VINO */
4520
4521	vino->control = 0;
4522	vino->a.next_4_desc = vino_drvdata->dummy_desc_table.dma;
4523	vino->b.next_4_desc = vino_drvdata->dummy_desc_table.dma;
4524	udelay(VINO_DESC_FETCH_DELAY);
4525
4526	vino->intr_status = 0;
4527
4528	vino->a.fifo_thres = VINO_FIFO_THRESHOLD_DEFAULT;
4529	vino->b.fifo_thres = VINO_FIFO_THRESHOLD_DEFAULT;
4530
4531	return 0;
4532}
4533
4534static int vino_init_channel_settings(struct vino_channel_settings *vcs,
4535				 unsigned int channel, const char *name)
4536{
4537	vcs->channel = channel;
4538	vcs->input = VINO_INPUT_NONE;
4539	vcs->alpha = 0;
4540	vcs->users = 0;
4541	vcs->data_format = VINO_DATA_FMT_GREY;
4542	vcs->data_norm = VINO_DATA_NORM_NTSC;
4543	vcs->decimation = 1;
4544	vino_set_default_clipping(vcs);
4545	vino_set_default_framerate(vcs);
4546
4547	vcs->capturing = 0;
4548
4549	mutex_init(&vcs->mutex);
4550	spin_lock_init(&vcs->capture_lock);
4551
4552	mutex_init(&vcs->fb_queue.queue_mutex);
4553	spin_lock_init(&vcs->fb_queue.queue_lock);
4554	init_waitqueue_head(&vcs->fb_queue.frame_wait_queue);
4555
4556	vcs->v4l_device = video_device_alloc();
4557	if (!vcs->v4l_device) {
4558		vino_module_cleanup(vino_init_stage);
4559		return -ENOMEM;
4560	}
4561	vino_init_stage++;
4562
4563	memcpy(vcs->v4l_device, &v4l_device_template,
4564	       sizeof(struct video_device));
4565	strcpy(vcs->v4l_device->name, name);
4566	vcs->v4l_device->release = video_device_release;
4567
4568	video_set_drvdata(vcs->v4l_device, vcs);
4569
4570	return 0;
4571}
4572
4573static int __init vino_module_init(void)
4574{
4575	int ret;
4576
4577	printk(KERN_INFO "SGI VINO driver version %s\n",
4578	       VINO_MODULE_VERSION);
4579
4580	ret = vino_probe();
4581	if (ret)
4582		return ret;
4583
4584	ret = vino_init();
4585	if (ret)
4586		return ret;
4587
4588	/* initialize data structures */
4589
4590	spin_lock_init(&vino_drvdata->vino_lock);
4591	spin_lock_init(&vino_drvdata->input_lock);
4592
4593	ret = vino_init_channel_settings(&vino_drvdata->a, VINO_CHANNEL_A,
4594				    vino_v4l_device_name_a);
4595	if (ret)
4596		return ret;
4597
4598	ret = vino_init_channel_settings(&vino_drvdata->b, VINO_CHANNEL_B,
4599				    vino_v4l_device_name_b);
4600	if (ret)
4601		return ret;
4602
4603	/* initialize hardware and register V4L devices */
4604
4605	ret = request_irq(SGI_VINO_IRQ, vino_interrupt, 0,
4606		vino_driver_description, NULL);
4607	if (ret) {
4608		printk(KERN_ERR "VINO: requesting IRQ %02d failed\n",
4609		       SGI_VINO_IRQ);
4610		vino_module_cleanup(vino_init_stage);
4611		return -EAGAIN;
4612	}
4613	vino_init_stage++;
4614
4615	ret = vino_i2c_add_bus();
4616	if (ret) {
4617		printk(KERN_ERR "VINO I2C bus registration failed\n");
4618		vino_module_cleanup(vino_init_stage);
4619		return ret;
4620	}
4621	vino_init_stage++;
4622
4623	ret = video_register_device(vino_drvdata->a.v4l_device,
4624				    VFL_TYPE_GRABBER, -1);
4625	if (ret < 0) {
4626		printk(KERN_ERR "VINO channel A Video4Linux-device "
4627		       "registration failed\n");
4628		vino_module_cleanup(vino_init_stage);
4629		return -EINVAL;
4630	}
4631	vino_init_stage++;
4632
4633	ret = video_register_device(vino_drvdata->b.v4l_device,
4634				    VFL_TYPE_GRABBER, -1);
4635	if (ret < 0) {
4636		printk(KERN_ERR "VINO channel B Video4Linux-device "
4637		       "registration failed\n");
4638		vino_module_cleanup(vino_init_stage);
4639		return -EINVAL;
4640	}
4641	vino_init_stage++;
4642
4643#if defined(CONFIG_KMOD) && defined(MODULE)
4644	request_module("saa7191");
4645	request_module("indycam");
4646#endif
4647
4648	dprintk("init complete!\n");
4649
4650	return 0;
4651}
4652
4653static void __exit vino_module_exit(void)
4654{
4655	dprintk("exiting, stage = %d ...\n", vino_init_stage);
4656	vino_module_cleanup(vino_init_stage);
4657	dprintk("cleanup complete, exit!\n");
4658}
4659
4660module_init(vino_module_init);
4661module_exit(vino_module_exit);
4662